diff options
Diffstat (limited to 'drivers/usb/phy')
26 files changed, 11706 insertions, 0 deletions
diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig new file mode 100644 index 000000000..2acbe41fb --- /dev/null +++ b/drivers/usb/phy/Kconfig @@ -0,0 +1,196 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Physical Layer USB driver configuration +# +menu "USB Physical Layer drivers" + +config USB_PHY + select EXTCON + def_bool n + +# +# USB Transceiver Drivers +# +config AB8500_USB + tristate "AB8500 USB Transceiver Driver" + depends on AB8500_CORE + select USB_PHY + help + Enable this to support the USB OTG transceiver in AB8500 chip. + This transceiver supports high and full speed devices plus, + in host mode, low speed. + +config FSL_USB2_OTG + tristate "Freescale USB OTG Transceiver Driver" + depends on USB_EHCI_FSL && USB_FSL_USB2 && USB_OTG_FSM=y && PM + depends on USB_GADGET || !USB_GADGET # if USB_GADGET=m, this can't be 'y' + select USB_PHY + help + Enable this to support Freescale USB OTG transceiver. + +config ISP1301_OMAP + tristate "Philips ISP1301 with OMAP OTG" + depends on I2C + depends on ARCH_OMAP_OTG || (ARM && COMPILE_TEST) + depends on USB + depends on USB_GADGET || !USB_GADGET # if USB_GADGET=m, this can't be 'y' + select USB_PHY + help + If you say yes here you get support for the Philips ISP1301 + USB-On-The-Go transceiver working with the OMAP OTG controller. + The ISP1301 is a full speed USB transceiver which is used in + products including H2, H3, and H4 development boards for Texas + Instruments OMAP processors. + + This driver can also be built as a module. If so, the module + will be called phy-isp1301-omap. + +config KEYSTONE_USB_PHY + tristate "Keystone USB PHY Driver" + depends on ARCH_KEYSTONE || COMPILE_TEST + depends on NOP_USB_XCEIV + help + Enable this to support Keystone USB phy. This driver provides + interface to interact with USB 2.0 and USB 3.0 PHY that is part + of the Keystone SOC. + +config NOP_USB_XCEIV + tristate "NOP USB Transceiver Driver" + depends on USB_GADGET || !USB_GADGET # if USB_GADGET=m, NOP can't be built-in + select USB_PHY + help + This driver is to be used by all the usb transceiver which are either + built-in with usb ip or which are autonomous and doesn't require any + phy programming such as ISP1x04 etc. + +config AM335X_CONTROL_USB + tristate + +config AM335X_PHY_USB + tristate "AM335x USB PHY Driver" + depends on ARM || COMPILE_TEST + depends on NOP_USB_XCEIV + select USB_PHY + select AM335X_CONTROL_USB + select USB_COMMON + help + This driver provides PHY support for that phy which part for the + AM335x SoC. + +config TWL6030_USB + tristate "TWL6030 USB Transceiver Driver" + depends on TWL4030_CORE && OMAP_USB2 && USB_MUSB_OMAP2PLUS + depends on OF + help + Enable this to support the USB OTG transceiver on TWL6030 + family chips. This TWL6030 transceiver has the VBUS and ID GND + and OTG SRP events capabilities. For all other transceiver functionality + UTMI PHY is embedded in OMAP4430. The internal PHY configurations APIs + are hooked to this driver through platform_data structure. + The definition of internal PHY APIs are in the mach-omap2 layer. + +config USB_GPIO_VBUS + tristate "GPIO based peripheral-only VBUS sensing 'transceiver'" + depends on GPIOLIB || COMPILE_TEST + depends on USB_GADGET || !USB_GADGET # if USB_GADGET=m, this can't be 'y' + select USB_PHY + help + Provides simple GPIO VBUS sensing for controllers with an + internal transceiver via the usb_phy interface, and + optionally control of a D+ pullup GPIO as well as a VBUS + current limit regulator. + +config OMAP_OTG + tristate "OMAP USB OTG controller driver" + depends on ARCH_OMAP_OTG && EXTCON + help + Enable this to support some transceivers on OMAP1 platforms. OTG + controller is needed to switch between host and peripheral modes. + + This driver can also be built as a module. If so, the module + will be called phy-omap-otg. + +config TAHVO_USB + tristate "Tahvo USB transceiver driver" + depends on MFD_RETU + depends on USB_GADGET || !USB_GADGET # if USB_GADGET=m, this can't be 'y' + select USB_PHY + help + Enable this to support USB transceiver on Tahvo. This is used + at least on Nokia 770. + +config TAHVO_USB_HOST_BY_DEFAULT + depends on TAHVO_USB + bool "Device in USB host mode by default" + help + Say Y here, if you want the device to enter USB host mode + by default on bootup. + +config USB_ISP1301 + tristate "NXP ISP1301 USB transceiver support" + depends on USB || USB_GADGET + depends on I2C + select USB_PHY + help + Say Y here to add support for the NXP ISP1301 USB transceiver driver. + This chip is typically used as USB transceiver for USB host, gadget + and OTG drivers (to be selected separately). + + To compile this driver as a module, choose M here: the + module will be called phy-isp1301. + +config USB_MV_OTG + tristate "Marvell USB OTG support" + depends on USB_EHCI_MV && USB_MV_UDC && PM && USB_OTG + depends on USB_GADGET || !USB_GADGET # if USB_GADGET=m, this can't be 'y' + select USB_PHY + help + Say Y here if you want to build Marvell USB OTG transceiver + driver in kernel (including PXA and MMP series). This driver + implements role switch between EHCI host driver and gadget driver. + + To compile this driver as a module, choose M here. + +config USB_MXS_PHY + tristate "Freescale MXS USB PHY support" + depends on ARCH_MXC || ARCH_MXS + select STMP_DEVICE + select USB_PHY + help + Enable this to support the Freescale MXS USB PHY. + + MXS Phy is used by some of the i.MX SoCs, for example imx23/28/6x. + +config USB_TEGRA_PHY + tristate "NVIDIA Tegra USB PHY Driver" + depends on ARCH_TEGRA || COMPILE_TEST + select USB_COMMON + select USB_PHY + select USB_ULPI + help + This driver provides PHY support for the USB controllers found + on NVIDIA Tegra SoC's. + +config USB_ULPI + bool "Generic ULPI Transceiver Driver" + depends on ARM || ARM64 || COMPILE_TEST + select USB_ULPI_VIEWPORT + help + Enable this to support ULPI connected USB OTG transceivers which + are likely found on embedded boards. + +config USB_ULPI_VIEWPORT + bool + help + Provides read/write operations to the ULPI phy register set for + controllers with a viewport register (e.g. Chipidea/ARC controllers). + +config JZ4770_PHY + tristate "Ingenic SoCs Transceiver Driver" + depends on MIPS || COMPILE_TEST + select USB_PHY + help + This driver provides PHY support for the USB controller found + on the JZ-series and X-series SoCs from Ingenic. + +endmenu diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile new file mode 100644 index 000000000..b352bdbe8 --- /dev/null +++ b/drivers/usb/phy/Makefile @@ -0,0 +1,27 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for physical layer USB drivers +# +obj-$(CONFIG_USB_PHY) += phy.o +obj-$(CONFIG_OF) += of.o + +# transceiver drivers, keep the list sorted + +obj-$(CONFIG_AB8500_USB) += phy-ab8500-usb.o +obj-$(CONFIG_FSL_USB2_OTG) += phy-fsl-usb.o +obj-$(CONFIG_ISP1301_OMAP) += phy-isp1301-omap.o +obj-$(CONFIG_NOP_USB_XCEIV) += phy-generic.o +obj-$(CONFIG_TAHVO_USB) += phy-tahvo.o +obj-$(CONFIG_AM335X_CONTROL_USB) += phy-am335x-control.o +obj-$(CONFIG_AM335X_PHY_USB) += phy-am335x.o +obj-$(CONFIG_OMAP_OTG) += phy-omap-otg.o +obj-$(CONFIG_TWL6030_USB) += phy-twl6030-usb.o +obj-$(CONFIG_USB_TEGRA_PHY) += phy-tegra-usb.o +obj-$(CONFIG_USB_GPIO_VBUS) += phy-gpio-vbus-usb.o +obj-$(CONFIG_USB_ISP1301) += phy-isp1301.o +obj-$(CONFIG_USB_MV_OTG) += phy-mv-usb.o +obj-$(CONFIG_USB_MXS_PHY) += phy-mxs-usb.o +obj-$(CONFIG_USB_ULPI) += phy-ulpi.o +obj-$(CONFIG_USB_ULPI_VIEWPORT) += phy-ulpi-viewport.o +obj-$(CONFIG_KEYSTONE_USB_PHY) += phy-keystone.o +obj-$(CONFIG_JZ4770_PHY) += phy-jz4770.o diff --git a/drivers/usb/phy/of.c b/drivers/usb/phy/of.c new file mode 100644 index 000000000..1ab134f45 --- /dev/null +++ b/drivers/usb/phy/of.c @@ -0,0 +1,43 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * USB of helper code + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/usb/of.h> +#include <linux/usb/otg.h> + +static const char *const usbphy_modes[] = { + [USBPHY_INTERFACE_MODE_UNKNOWN] = "", + [USBPHY_INTERFACE_MODE_UTMI] = "utmi", + [USBPHY_INTERFACE_MODE_UTMIW] = "utmi_wide", + [USBPHY_INTERFACE_MODE_ULPI] = "ulpi", + [USBPHY_INTERFACE_MODE_SERIAL] = "serial", + [USBPHY_INTERFACE_MODE_HSIC] = "hsic", +}; + +/** + * of_usb_get_phy_mode - Get phy mode for given device_node + * @np: Pointer to the given device_node + * + * The function gets phy interface string from property 'phy_type', + * and returns the corresponding enum usb_phy_interface + */ +enum usb_phy_interface of_usb_get_phy_mode(struct device_node *np) +{ + const char *phy_type; + int err, i; + + err = of_property_read_string(np, "phy_type", &phy_type); + if (err < 0) + return USBPHY_INTERFACE_MODE_UNKNOWN; + + for (i = 0; i < ARRAY_SIZE(usbphy_modes); i++) + if (!strcmp(phy_type, usbphy_modes[i])) + return i; + + return USBPHY_INTERFACE_MODE_UNKNOWN; +} +EXPORT_SYMBOL_GPL(of_usb_get_phy_mode); diff --git a/drivers/usb/phy/phy-ab8500-usb.c b/drivers/usb/phy/phy-ab8500-usb.c new file mode 100644 index 000000000..4c52ba96f --- /dev/null +++ b/drivers/usb/phy/phy-ab8500-usb.c @@ -0,0 +1,1013 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * USB transceiver driver for AB8500 family chips + * + * Copyright (C) 2010-2013 ST-Ericsson AB + * Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com> + * Avinash Kumar <avinash.kumar@stericsson.com> + * Thirupathi Chippakurthy <thirupathi.chippakurthy@stericsson.com> + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/usb/otg.h> +#include <linux/slab.h> +#include <linux/notifier.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/clk.h> +#include <linux/err.h> +#include <linux/mfd/abx500.h> +#include <linux/mfd/abx500/ab8500.h> +#include <linux/usb/musb-ux500.h> +#include <linux/regulator/consumer.h> +#include <linux/pinctrl/consumer.h> + +/* Bank AB8500_SYS_CTRL2_BLOCK */ +#define AB8500_MAIN_WD_CTRL_REG 0x01 + +/* Bank AB8500_USB */ +#define AB8500_USB_LINE_STAT_REG 0x80 +#define AB8505_USB_LINE_STAT_REG 0x94 +#define AB8500_USB_PHY_CTRL_REG 0x8A + +/* Bank AB8500_DEVELOPMENT */ +#define AB8500_BANK12_ACCESS 0x00 + +/* Bank AB8500_DEBUG */ +#define AB8500_USB_PHY_TUNE1 0x05 +#define AB8500_USB_PHY_TUNE2 0x06 +#define AB8500_USB_PHY_TUNE3 0x07 + +/* Bank AB8500_INTERRUPT */ +#define AB8500_IT_SOURCE2_REG 0x01 + +#define AB8500_BIT_OTG_STAT_ID (1 << 0) +#define AB8500_BIT_PHY_CTRL_HOST_EN (1 << 0) +#define AB8500_BIT_PHY_CTRL_DEVICE_EN (1 << 1) +#define AB8500_BIT_WD_CTRL_ENABLE (1 << 0) +#define AB8500_BIT_WD_CTRL_KICK (1 << 1) +#define AB8500_BIT_SOURCE2_VBUSDET (1 << 7) + +#define AB8500_WD_KICK_DELAY_US 100 /* usec */ +#define AB8500_WD_V11_DISABLE_DELAY_US 100 /* usec */ +#define AB8500_V20_31952_DISABLE_DELAY_US 100 /* usec */ + +/* Usb line status register */ +enum ab8500_usb_link_status { + USB_LINK_NOT_CONFIGURED_8500 = 0, + USB_LINK_STD_HOST_NC_8500, + USB_LINK_STD_HOST_C_NS_8500, + USB_LINK_STD_HOST_C_S_8500, + USB_LINK_HOST_CHG_NM_8500, + USB_LINK_HOST_CHG_HS_8500, + USB_LINK_HOST_CHG_HS_CHIRP_8500, + USB_LINK_DEDICATED_CHG_8500, + USB_LINK_ACA_RID_A_8500, + USB_LINK_ACA_RID_B_8500, + USB_LINK_ACA_RID_C_NM_8500, + USB_LINK_ACA_RID_C_HS_8500, + USB_LINK_ACA_RID_C_HS_CHIRP_8500, + USB_LINK_HM_IDGND_8500, + USB_LINK_RESERVED_8500, + USB_LINK_NOT_VALID_LINK_8500, +}; + +enum ab8505_usb_link_status { + USB_LINK_NOT_CONFIGURED_8505 = 0, + USB_LINK_STD_HOST_NC_8505, + USB_LINK_STD_HOST_C_NS_8505, + USB_LINK_STD_HOST_C_S_8505, + USB_LINK_CDP_8505, + USB_LINK_RESERVED0_8505, + USB_LINK_RESERVED1_8505, + USB_LINK_DEDICATED_CHG_8505, + USB_LINK_ACA_RID_A_8505, + USB_LINK_ACA_RID_B_8505, + USB_LINK_ACA_RID_C_NM_8505, + USB_LINK_RESERVED2_8505, + USB_LINK_RESERVED3_8505, + USB_LINK_HM_IDGND_8505, + USB_LINK_CHARGERPORT_NOT_OK_8505, + USB_LINK_CHARGER_DM_HIGH_8505, + USB_LINK_PHYEN_NO_VBUS_NO_IDGND_8505, + USB_LINK_STD_UPSTREAM_NO_IDGNG_NO_VBUS_8505, + USB_LINK_STD_UPSTREAM_8505, + USB_LINK_CHARGER_SE1_8505, + USB_LINK_CARKIT_CHGR_1_8505, + USB_LINK_CARKIT_CHGR_2_8505, + USB_LINK_ACA_DOCK_CHGR_8505, + USB_LINK_SAMSUNG_BOOT_CBL_PHY_EN_8505, + USB_LINK_SAMSUNG_BOOT_CBL_PHY_DISB_8505, + USB_LINK_SAMSUNG_UART_CBL_PHY_EN_8505, + USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_8505, + USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_8505, +}; + +enum ab8500_usb_mode { + USB_IDLE = 0, + USB_PERIPHERAL, + USB_HOST, + USB_DEDICATED_CHG, + USB_UART +}; + +/* Register USB_LINK_STATUS interrupt */ +#define AB8500_USB_FLAG_USE_LINK_STATUS_IRQ (1 << 0) +/* Register ID_WAKEUP_F interrupt */ +#define AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ (1 << 1) +/* Register VBUS_DET_F interrupt */ +#define AB8500_USB_FLAG_USE_VBUS_DET_IRQ (1 << 2) +/* Driver is using the ab-iddet driver*/ +#define AB8500_USB_FLAG_USE_AB_IDDET (1 << 3) +/* Enable setting regulators voltage */ +#define AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE (1 << 4) + +struct ab8500_usb { + struct usb_phy phy; + struct device *dev; + struct ab8500 *ab8500; + unsigned vbus_draw; + struct work_struct phy_dis_work; + enum ab8500_usb_mode mode; + struct clk *sysclk; + struct regulator *v_ape; + struct regulator *v_musb; + struct regulator *v_ulpi; + int saved_v_ulpi; + int previous_link_status_state; + struct pinctrl *pinctrl; + struct pinctrl_state *pins_sleep; + bool enabled_charging_detection; + unsigned int flags; +}; + +static inline struct ab8500_usb *phy_to_ab(struct usb_phy *x) +{ + return container_of(x, struct ab8500_usb, phy); +} + +static void ab8500_usb_wd_workaround(struct ab8500_usb *ab) +{ + abx500_set_register_interruptible(ab->dev, + AB8500_SYS_CTRL2_BLOCK, + AB8500_MAIN_WD_CTRL_REG, + AB8500_BIT_WD_CTRL_ENABLE); + + udelay(AB8500_WD_KICK_DELAY_US); + + abx500_set_register_interruptible(ab->dev, + AB8500_SYS_CTRL2_BLOCK, + AB8500_MAIN_WD_CTRL_REG, + (AB8500_BIT_WD_CTRL_ENABLE + | AB8500_BIT_WD_CTRL_KICK)); + + udelay(AB8500_WD_V11_DISABLE_DELAY_US); + + abx500_set_register_interruptible(ab->dev, + AB8500_SYS_CTRL2_BLOCK, + AB8500_MAIN_WD_CTRL_REG, + 0); +} + +static void ab8500_usb_regulator_enable(struct ab8500_usb *ab) +{ + int ret, volt; + + ret = regulator_enable(ab->v_ape); + if (ret) + dev_err(ab->dev, "Failed to enable v-ape\n"); + + if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) { + ab->saved_v_ulpi = regulator_get_voltage(ab->v_ulpi); + if (ab->saved_v_ulpi < 0) + dev_err(ab->dev, "Failed to get v_ulpi voltage\n"); + + ret = regulator_set_voltage(ab->v_ulpi, 1300000, 1350000); + if (ret < 0) + dev_err(ab->dev, "Failed to set the Vintcore to 1.3V, ret=%d\n", + ret); + + ret = regulator_set_load(ab->v_ulpi, 28000); + if (ret < 0) + dev_err(ab->dev, "Failed to set optimum mode (ret=%d)\n", + ret); + } + + ret = regulator_enable(ab->v_ulpi); + if (ret) + dev_err(ab->dev, "Failed to enable vddulpivio18\n"); + + if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) { + volt = regulator_get_voltage(ab->v_ulpi); + if ((volt != 1300000) && (volt != 1350000)) + dev_err(ab->dev, "Vintcore is not set to 1.3V volt=%d\n", + volt); + } + + ret = regulator_enable(ab->v_musb); + if (ret) + dev_err(ab->dev, "Failed to enable musb_1v8\n"); +} + +static void ab8500_usb_regulator_disable(struct ab8500_usb *ab) +{ + int ret; + + regulator_disable(ab->v_musb); + + regulator_disable(ab->v_ulpi); + + /* USB is not the only consumer of Vintcore, restore old settings */ + if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) { + if (ab->saved_v_ulpi > 0) { + ret = regulator_set_voltage(ab->v_ulpi, + ab->saved_v_ulpi, ab->saved_v_ulpi); + if (ret < 0) + dev_err(ab->dev, "Failed to set the Vintcore to %duV, ret=%d\n", + ab->saved_v_ulpi, ret); + } + + ret = regulator_set_load(ab->v_ulpi, 0); + if (ret < 0) + dev_err(ab->dev, "Failed to set optimum mode (ret=%d)\n", + ret); + } + + regulator_disable(ab->v_ape); +} + +static void ab8500_usb_wd_linkstatus(struct ab8500_usb *ab, u8 bit) +{ + /* Workaround for v2.0 bug # 31952 */ + if (is_ab8500_2p0(ab->ab8500)) { + abx500_mask_and_set_register_interruptible(ab->dev, + AB8500_USB, AB8500_USB_PHY_CTRL_REG, + bit, bit); + udelay(AB8500_V20_31952_DISABLE_DELAY_US); + } +} + +static void ab8500_usb_phy_enable(struct ab8500_usb *ab, bool sel_host) +{ + u8 bit; + bit = sel_host ? AB8500_BIT_PHY_CTRL_HOST_EN : + AB8500_BIT_PHY_CTRL_DEVICE_EN; + + /* mux and configure USB pins to DEFAULT state */ + ab->pinctrl = pinctrl_get_select(ab->dev, PINCTRL_STATE_DEFAULT); + if (IS_ERR(ab->pinctrl)) + dev_err(ab->dev, "could not get/set default pinstate\n"); + + if (clk_prepare_enable(ab->sysclk)) + dev_err(ab->dev, "can't prepare/enable clock\n"); + + ab8500_usb_regulator_enable(ab); + + abx500_mask_and_set_register_interruptible(ab->dev, + AB8500_USB, AB8500_USB_PHY_CTRL_REG, + bit, bit); +} + +static void ab8500_usb_phy_disable(struct ab8500_usb *ab, bool sel_host) +{ + u8 bit; + bit = sel_host ? AB8500_BIT_PHY_CTRL_HOST_EN : + AB8500_BIT_PHY_CTRL_DEVICE_EN; + + ab8500_usb_wd_linkstatus(ab, bit); + + abx500_mask_and_set_register_interruptible(ab->dev, + AB8500_USB, AB8500_USB_PHY_CTRL_REG, + bit, 0); + + /* Needed to disable the phy.*/ + ab8500_usb_wd_workaround(ab); + + clk_disable_unprepare(ab->sysclk); + + ab8500_usb_regulator_disable(ab); + + if (!IS_ERR(ab->pinctrl)) { + /* configure USB pins to SLEEP state */ + ab->pins_sleep = pinctrl_lookup_state(ab->pinctrl, + PINCTRL_STATE_SLEEP); + + if (IS_ERR(ab->pins_sleep)) + dev_dbg(ab->dev, "could not get sleep pinstate\n"); + else if (pinctrl_select_state(ab->pinctrl, ab->pins_sleep)) + dev_err(ab->dev, "could not set pins to sleep state\n"); + + /* + * as USB pins are shared with iddet, release them to allow + * iddet to request them + */ + pinctrl_put(ab->pinctrl); + } +} + +#define ab8500_usb_host_phy_en(ab) ab8500_usb_phy_enable(ab, true) +#define ab8500_usb_host_phy_dis(ab) ab8500_usb_phy_disable(ab, true) +#define ab8500_usb_peri_phy_en(ab) ab8500_usb_phy_enable(ab, false) +#define ab8500_usb_peri_phy_dis(ab) ab8500_usb_phy_disable(ab, false) + +static int ab8505_usb_link_status_update(struct ab8500_usb *ab, + enum ab8505_usb_link_status lsts) +{ + enum ux500_musb_vbus_id_status event = 0; + + dev_dbg(ab->dev, "ab8505_usb_link_status_update %d\n", lsts); + + /* + * Spurious link_status interrupts are seen at the time of + * disconnection of a device in RIDA state + */ + if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8505 && + (lsts == USB_LINK_STD_HOST_NC_8505)) + return 0; + + ab->previous_link_status_state = lsts; + + switch (lsts) { + case USB_LINK_ACA_RID_B_8505: + event = UX500_MUSB_RIDB; + fallthrough; + case USB_LINK_NOT_CONFIGURED_8505: + case USB_LINK_RESERVED0_8505: + case USB_LINK_RESERVED1_8505: + case USB_LINK_RESERVED2_8505: + case USB_LINK_RESERVED3_8505: + ab->mode = USB_IDLE; + ab->phy.otg->default_a = false; + ab->vbus_draw = 0; + if (event != UX500_MUSB_RIDB) + event = UX500_MUSB_NONE; + /* + * Fallback to default B_IDLE as nothing + * is connected + */ + ab->phy.otg->state = OTG_STATE_B_IDLE; + usb_phy_set_event(&ab->phy, USB_EVENT_NONE); + break; + + case USB_LINK_ACA_RID_C_NM_8505: + event = UX500_MUSB_RIDC; + fallthrough; + case USB_LINK_STD_HOST_NC_8505: + case USB_LINK_STD_HOST_C_NS_8505: + case USB_LINK_STD_HOST_C_S_8505: + case USB_LINK_CDP_8505: + if (ab->mode == USB_IDLE) { + ab->mode = USB_PERIPHERAL; + ab8500_usb_peri_phy_en(ab); + atomic_notifier_call_chain(&ab->phy.notifier, + UX500_MUSB_PREPARE, &ab->vbus_draw); + usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED); + } + if (event != UX500_MUSB_RIDC) + event = UX500_MUSB_VBUS; + break; + + case USB_LINK_ACA_RID_A_8505: + case USB_LINK_ACA_DOCK_CHGR_8505: + event = UX500_MUSB_RIDA; + fallthrough; + case USB_LINK_HM_IDGND_8505: + if (ab->mode == USB_IDLE) { + ab->mode = USB_HOST; + ab8500_usb_host_phy_en(ab); + atomic_notifier_call_chain(&ab->phy.notifier, + UX500_MUSB_PREPARE, &ab->vbus_draw); + } + ab->phy.otg->default_a = true; + if (event != UX500_MUSB_RIDA) + event = UX500_MUSB_ID; + atomic_notifier_call_chain(&ab->phy.notifier, + event, &ab->vbus_draw); + break; + + case USB_LINK_DEDICATED_CHG_8505: + ab->mode = USB_DEDICATED_CHG; + event = UX500_MUSB_CHARGER; + atomic_notifier_call_chain(&ab->phy.notifier, + event, &ab->vbus_draw); + usb_phy_set_event(&ab->phy, USB_EVENT_CHARGER); + break; + + /* + * FIXME: For now we rely on the boot firmware to set up the necessary + * PHY/pin configuration for UART mode. + * + * AB8505 does not seem to report any status change for UART cables, + * possibly because it cannot detect them autonomously. + * We may need to measure the ID resistance manually to reliably + * detect UART cables after bootup. + */ + case USB_LINK_SAMSUNG_UART_CBL_PHY_EN_8505: + case USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_8505: + if (ab->mode == USB_IDLE) { + ab->mode = USB_UART; + ab8500_usb_peri_phy_en(ab); + } + + break; + + default: + break; + } + + return 0; +} + +static int ab8500_usb_link_status_update(struct ab8500_usb *ab, + enum ab8500_usb_link_status lsts) +{ + enum ux500_musb_vbus_id_status event = 0; + + dev_dbg(ab->dev, "ab8500_usb_link_status_update %d\n", lsts); + + /* + * Spurious link_status interrupts are seen in case of a + * disconnection of a device in IDGND and RIDA stage + */ + if (ab->previous_link_status_state == USB_LINK_HM_IDGND_8500 && + (lsts == USB_LINK_STD_HOST_C_NS_8500 || + lsts == USB_LINK_STD_HOST_NC_8500)) + return 0; + + if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8500 && + lsts == USB_LINK_STD_HOST_NC_8500) + return 0; + + ab->previous_link_status_state = lsts; + + switch (lsts) { + case USB_LINK_ACA_RID_B_8500: + event = UX500_MUSB_RIDB; + fallthrough; + case USB_LINK_NOT_CONFIGURED_8500: + case USB_LINK_NOT_VALID_LINK_8500: + ab->mode = USB_IDLE; + ab->phy.otg->default_a = false; + ab->vbus_draw = 0; + if (event != UX500_MUSB_RIDB) + event = UX500_MUSB_NONE; + /* Fallback to default B_IDLE as nothing is connected */ + ab->phy.otg->state = OTG_STATE_B_IDLE; + usb_phy_set_event(&ab->phy, USB_EVENT_NONE); + break; + + case USB_LINK_ACA_RID_C_NM_8500: + case USB_LINK_ACA_RID_C_HS_8500: + case USB_LINK_ACA_RID_C_HS_CHIRP_8500: + event = UX500_MUSB_RIDC; + fallthrough; + case USB_LINK_STD_HOST_NC_8500: + case USB_LINK_STD_HOST_C_NS_8500: + case USB_LINK_STD_HOST_C_S_8500: + case USB_LINK_HOST_CHG_NM_8500: + case USB_LINK_HOST_CHG_HS_8500: + case USB_LINK_HOST_CHG_HS_CHIRP_8500: + if (ab->mode == USB_IDLE) { + ab->mode = USB_PERIPHERAL; + ab8500_usb_peri_phy_en(ab); + atomic_notifier_call_chain(&ab->phy.notifier, + UX500_MUSB_PREPARE, &ab->vbus_draw); + usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED); + } + if (event != UX500_MUSB_RIDC) + event = UX500_MUSB_VBUS; + break; + + case USB_LINK_ACA_RID_A_8500: + event = UX500_MUSB_RIDA; + fallthrough; + case USB_LINK_HM_IDGND_8500: + if (ab->mode == USB_IDLE) { + ab->mode = USB_HOST; + ab8500_usb_host_phy_en(ab); + atomic_notifier_call_chain(&ab->phy.notifier, + UX500_MUSB_PREPARE, &ab->vbus_draw); + } + ab->phy.otg->default_a = true; + if (event != UX500_MUSB_RIDA) + event = UX500_MUSB_ID; + atomic_notifier_call_chain(&ab->phy.notifier, + event, &ab->vbus_draw); + break; + + case USB_LINK_DEDICATED_CHG_8500: + ab->mode = USB_DEDICATED_CHG; + event = UX500_MUSB_CHARGER; + atomic_notifier_call_chain(&ab->phy.notifier, + event, &ab->vbus_draw); + usb_phy_set_event(&ab->phy, USB_EVENT_CHARGER); + break; + + case USB_LINK_RESERVED_8500: + break; + } + + return 0; +} + +/* + * Connection Sequence: + * 1. Link Status Interrupt + * 2. Enable AB clock + * 3. Enable AB regulators + * 4. Enable USB phy + * 5. Reset the musb controller + * 6. Switch the ULPI GPIO pins to function mode + * 7. Enable the musb Peripheral5 clock + * 8. Restore MUSB context + */ +static int abx500_usb_link_status_update(struct ab8500_usb *ab) +{ + u8 reg; + int ret = 0; + + if (is_ab8500(ab->ab8500)) { + enum ab8500_usb_link_status lsts; + + ret = abx500_get_register_interruptible(ab->dev, + AB8500_USB, AB8500_USB_LINE_STAT_REG, ®); + if (ret < 0) + return ret; + lsts = (reg >> 3) & 0x0F; + ret = ab8500_usb_link_status_update(ab, lsts); + } else if (is_ab8505(ab->ab8500)) { + enum ab8505_usb_link_status lsts; + + ret = abx500_get_register_interruptible(ab->dev, + AB8500_USB, AB8505_USB_LINE_STAT_REG, ®); + if (ret < 0) + return ret; + lsts = (reg >> 3) & 0x1F; + ret = ab8505_usb_link_status_update(ab, lsts); + } + + return ret; +} + +/* + * Disconnection Sequence: + * 1. Disconnect Interrupt + * 2. Disable regulators + * 3. Disable AB clock + * 4. Disable the Phy + * 5. Link Status Interrupt + * 6. Disable Musb Clock + */ +static irqreturn_t ab8500_usb_disconnect_irq(int irq, void *data) +{ + struct ab8500_usb *ab = (struct ab8500_usb *) data; + enum usb_phy_events event = USB_EVENT_NONE; + + /* Link status will not be updated till phy is disabled. */ + if (ab->mode == USB_HOST) { + ab->phy.otg->default_a = false; + ab->vbus_draw = 0; + atomic_notifier_call_chain(&ab->phy.notifier, + event, &ab->vbus_draw); + ab8500_usb_host_phy_dis(ab); + ab->mode = USB_IDLE; + } + + if (ab->mode == USB_PERIPHERAL) { + atomic_notifier_call_chain(&ab->phy.notifier, + event, &ab->vbus_draw); + ab8500_usb_peri_phy_dis(ab); + atomic_notifier_call_chain(&ab->phy.notifier, + UX500_MUSB_CLEAN, &ab->vbus_draw); + ab->mode = USB_IDLE; + ab->phy.otg->default_a = false; + ab->vbus_draw = 0; + } + + if (ab->mode == USB_UART) { + ab8500_usb_peri_phy_dis(ab); + ab->mode = USB_IDLE; + } + + if (is_ab8500_2p0(ab->ab8500)) { + if (ab->mode == USB_DEDICATED_CHG) { + ab8500_usb_wd_linkstatus(ab, + AB8500_BIT_PHY_CTRL_DEVICE_EN); + abx500_mask_and_set_register_interruptible(ab->dev, + AB8500_USB, AB8500_USB_PHY_CTRL_REG, + AB8500_BIT_PHY_CTRL_DEVICE_EN, 0); + } + } + + return IRQ_HANDLED; +} + +static irqreturn_t ab8500_usb_link_status_irq(int irq, void *data) +{ + struct ab8500_usb *ab = (struct ab8500_usb *)data; + + abx500_usb_link_status_update(ab); + + return IRQ_HANDLED; +} + +static void ab8500_usb_phy_disable_work(struct work_struct *work) +{ + struct ab8500_usb *ab = container_of(work, struct ab8500_usb, + phy_dis_work); + + if (!ab->phy.otg->host) + ab8500_usb_host_phy_dis(ab); + + if (!ab->phy.otg->gadget) + ab8500_usb_peri_phy_dis(ab); +} + +static int ab8500_usb_set_suspend(struct usb_phy *x, int suspend) +{ + /* TODO */ + return 0; +} + +static int ab8500_usb_set_peripheral(struct usb_otg *otg, + struct usb_gadget *gadget) +{ + struct ab8500_usb *ab; + + if (!otg) + return -ENODEV; + + ab = phy_to_ab(otg->usb_phy); + + ab->phy.otg->gadget = gadget; + + /* Some drivers call this function in atomic context. + * Do not update ab8500 registers directly till this + * is fixed. + */ + + if ((ab->mode != USB_IDLE) && !gadget) { + ab->mode = USB_IDLE; + schedule_work(&ab->phy_dis_work); + } + + return 0; +} + +static int ab8500_usb_set_host(struct usb_otg *otg, struct usb_bus *host) +{ + struct ab8500_usb *ab; + + if (!otg) + return -ENODEV; + + ab = phy_to_ab(otg->usb_phy); + + ab->phy.otg->host = host; + + /* Some drivers call this function in atomic context. + * Do not update ab8500 registers directly till this + * is fixed. + */ + + if ((ab->mode != USB_IDLE) && !host) { + ab->mode = USB_IDLE; + schedule_work(&ab->phy_dis_work); + } + + return 0; +} + +static void ab8500_usb_restart_phy(struct ab8500_usb *ab) +{ + abx500_mask_and_set_register_interruptible(ab->dev, + AB8500_USB, AB8500_USB_PHY_CTRL_REG, + AB8500_BIT_PHY_CTRL_DEVICE_EN, + AB8500_BIT_PHY_CTRL_DEVICE_EN); + + udelay(100); + + abx500_mask_and_set_register_interruptible(ab->dev, + AB8500_USB, AB8500_USB_PHY_CTRL_REG, + AB8500_BIT_PHY_CTRL_DEVICE_EN, + 0); + + abx500_mask_and_set_register_interruptible(ab->dev, + AB8500_USB, AB8500_USB_PHY_CTRL_REG, + AB8500_BIT_PHY_CTRL_HOST_EN, + AB8500_BIT_PHY_CTRL_HOST_EN); + + udelay(100); + + abx500_mask_and_set_register_interruptible(ab->dev, + AB8500_USB, AB8500_USB_PHY_CTRL_REG, + AB8500_BIT_PHY_CTRL_HOST_EN, + 0); +} + +static int ab8500_usb_regulator_get(struct ab8500_usb *ab) +{ + int err; + + ab->v_ape = devm_regulator_get(ab->dev, "v-ape"); + if (IS_ERR(ab->v_ape)) { + dev_err(ab->dev, "Could not get v-ape supply\n"); + err = PTR_ERR(ab->v_ape); + return err; + } + + ab->v_ulpi = devm_regulator_get(ab->dev, "vddulpivio18"); + if (IS_ERR(ab->v_ulpi)) { + dev_err(ab->dev, "Could not get vddulpivio18 supply\n"); + err = PTR_ERR(ab->v_ulpi); + return err; + } + + ab->v_musb = devm_regulator_get(ab->dev, "musb_1v8"); + if (IS_ERR(ab->v_musb)) { + dev_err(ab->dev, "Could not get musb_1v8 supply\n"); + err = PTR_ERR(ab->v_musb); + return err; + } + + return 0; +} + +static int ab8500_usb_irq_setup(struct platform_device *pdev, + struct ab8500_usb *ab) +{ + int err; + int irq; + + if (ab->flags & AB8500_USB_FLAG_USE_LINK_STATUS_IRQ) { + irq = platform_get_irq_byname(pdev, "USB_LINK_STATUS"); + if (irq < 0) + return irq; + err = devm_request_threaded_irq(&pdev->dev, irq, NULL, + ab8500_usb_link_status_irq, + IRQF_NO_SUSPEND | IRQF_SHARED | IRQF_ONESHOT, + "usb-link-status", ab); + if (err < 0) { + dev_err(ab->dev, "request_irq failed for link status irq\n"); + return err; + } + } + + if (ab->flags & AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ) { + irq = platform_get_irq_byname(pdev, "ID_WAKEUP_F"); + if (irq < 0) + return irq; + err = devm_request_threaded_irq(&pdev->dev, irq, NULL, + ab8500_usb_disconnect_irq, + IRQF_NO_SUSPEND | IRQF_SHARED | IRQF_ONESHOT, + "usb-id-fall", ab); + if (err < 0) { + dev_err(ab->dev, "request_irq failed for ID fall irq\n"); + return err; + } + } + + if (ab->flags & AB8500_USB_FLAG_USE_VBUS_DET_IRQ) { + irq = platform_get_irq_byname(pdev, "VBUS_DET_F"); + if (irq < 0) + return irq; + err = devm_request_threaded_irq(&pdev->dev, irq, NULL, + ab8500_usb_disconnect_irq, + IRQF_NO_SUSPEND | IRQF_SHARED | IRQF_ONESHOT, + "usb-vbus-fall", ab); + if (err < 0) { + dev_err(ab->dev, "request_irq failed for Vbus fall irq\n"); + return err; + } + } + + return 0; +} + +static void ab8500_usb_set_ab8500_tuning_values(struct ab8500_usb *ab) +{ + int err; + + /* Enable the PBT/Bank 0x12 access */ + err = abx500_set_register_interruptible(ab->dev, + AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x01); + if (err < 0) + dev_err(ab->dev, "Failed to enable bank12 access err=%d\n", + err); + + err = abx500_set_register_interruptible(ab->dev, + AB8500_DEBUG, AB8500_USB_PHY_TUNE1, 0xC8); + if (err < 0) + dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n", + err); + + err = abx500_set_register_interruptible(ab->dev, + AB8500_DEBUG, AB8500_USB_PHY_TUNE2, 0x00); + if (err < 0) + dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n", + err); + + err = abx500_set_register_interruptible(ab->dev, + AB8500_DEBUG, AB8500_USB_PHY_TUNE3, 0x78); + if (err < 0) + dev_err(ab->dev, "Failed to set PHY_TUNE3 register err=%d\n", + err); + + /* Switch to normal mode/disable Bank 0x12 access */ + err = abx500_set_register_interruptible(ab->dev, + AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x00); + if (err < 0) + dev_err(ab->dev, "Failed to switch bank12 access err=%d\n", + err); +} + +static void ab8500_usb_set_ab8505_tuning_values(struct ab8500_usb *ab) +{ + int err; + + /* Enable the PBT/Bank 0x12 access */ + err = abx500_mask_and_set_register_interruptible(ab->dev, + AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, + 0x01, 0x01); + if (err < 0) + dev_err(ab->dev, "Failed to enable bank12 access err=%d\n", + err); + + err = abx500_mask_and_set_register_interruptible(ab->dev, + AB8500_DEBUG, AB8500_USB_PHY_TUNE1, + 0xC8, 0xC8); + if (err < 0) + dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n", + err); + + err = abx500_mask_and_set_register_interruptible(ab->dev, + AB8500_DEBUG, AB8500_USB_PHY_TUNE2, + 0x60, 0x60); + if (err < 0) + dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n", + err); + + err = abx500_mask_and_set_register_interruptible(ab->dev, + AB8500_DEBUG, AB8500_USB_PHY_TUNE3, + 0xFC, 0x80); + + if (err < 0) + dev_err(ab->dev, "Failed to set PHY_TUNE3 register err=%d\n", + err); + + /* Switch to normal mode/disable Bank 0x12 access */ + err = abx500_mask_and_set_register_interruptible(ab->dev, + AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, + 0x00, 0x00); + if (err < 0) + dev_err(ab->dev, "Failed to switch bank12 access err=%d\n", + err); +} + +static int ab8500_usb_probe(struct platform_device *pdev) +{ + struct ab8500_usb *ab; + struct ab8500 *ab8500; + struct usb_otg *otg; + int err; + int rev; + + ab8500 = dev_get_drvdata(pdev->dev.parent); + rev = abx500_get_chip_id(&pdev->dev); + + if (is_ab8500_1p1_or_earlier(ab8500)) { + dev_err(&pdev->dev, "Unsupported AB8500 chip rev=%d\n", rev); + return -ENODEV; + } + + ab = devm_kzalloc(&pdev->dev, sizeof(*ab), GFP_KERNEL); + if (!ab) + return -ENOMEM; + + otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL); + if (!otg) + return -ENOMEM; + + ab->dev = &pdev->dev; + ab->ab8500 = ab8500; + ab->phy.dev = ab->dev; + ab->phy.otg = otg; + ab->phy.label = "ab8500"; + ab->phy.set_suspend = ab8500_usb_set_suspend; + ab->phy.otg->state = OTG_STATE_UNDEFINED; + + otg->usb_phy = &ab->phy; + otg->set_host = ab8500_usb_set_host; + otg->set_peripheral = ab8500_usb_set_peripheral; + + if (is_ab8500(ab->ab8500)) { + ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ | + AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ | + AB8500_USB_FLAG_USE_VBUS_DET_IRQ | + AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE; + } else if (is_ab8505(ab->ab8500)) { + ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ | + AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ | + AB8500_USB_FLAG_USE_VBUS_DET_IRQ | + AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE; + } + + /* Disable regulator voltage setting for AB8500 <= v2.0 */ + if (is_ab8500_2p0_or_earlier(ab->ab8500)) + ab->flags &= ~AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE; + + platform_set_drvdata(pdev, ab); + + /* all: Disable phy when called from set_host and set_peripheral */ + INIT_WORK(&ab->phy_dis_work, ab8500_usb_phy_disable_work); + + err = ab8500_usb_regulator_get(ab); + if (err) + return err; + + ab->sysclk = devm_clk_get(ab->dev, "sysclk"); + if (IS_ERR(ab->sysclk)) { + dev_err(ab->dev, "Could not get sysclk.\n"); + return PTR_ERR(ab->sysclk); + } + + err = ab8500_usb_irq_setup(pdev, ab); + if (err < 0) + return err; + + err = usb_add_phy(&ab->phy, USB_PHY_TYPE_USB2); + if (err) { + dev_err(&pdev->dev, "Can't register transceiver\n"); + return err; + } + + if (is_ab8500(ab->ab8500) && !is_ab8500_2p0_or_earlier(ab->ab8500)) + /* Phy tuning values for AB8500 > v2.0 */ + ab8500_usb_set_ab8500_tuning_values(ab); + else if (is_ab8505(ab->ab8500)) + /* Phy tuning values for AB8505 */ + ab8500_usb_set_ab8505_tuning_values(ab); + + /* Needed to enable ID detection. */ + ab8500_usb_wd_workaround(ab); + + /* + * This is required for usb-link-status to work properly when a + * cable is connected at boot time. + */ + ab8500_usb_restart_phy(ab); + + abx500_usb_link_status_update(ab); + + dev_info(&pdev->dev, "revision 0x%2x driver initialized\n", rev); + + return 0; +} + +static int ab8500_usb_remove(struct platform_device *pdev) +{ + struct ab8500_usb *ab = platform_get_drvdata(pdev); + + cancel_work_sync(&ab->phy_dis_work); + + usb_remove_phy(&ab->phy); + + if (ab->mode == USB_HOST) + ab8500_usb_host_phy_dis(ab); + else if (ab->mode == USB_PERIPHERAL) + ab8500_usb_peri_phy_dis(ab); + + return 0; +} + +static const struct platform_device_id ab8500_usb_devtype[] = { + { .name = "ab8500-usb", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(platform, ab8500_usb_devtype); + +static struct platform_driver ab8500_usb_driver = { + .probe = ab8500_usb_probe, + .remove = ab8500_usb_remove, + .id_table = ab8500_usb_devtype, + .driver = { + .name = "abx5x0-usb", + }, +}; + +static int __init ab8500_usb_init(void) +{ + return platform_driver_register(&ab8500_usb_driver); +} +subsys_initcall(ab8500_usb_init); + +static void __exit ab8500_usb_exit(void) +{ + platform_driver_unregister(&ab8500_usb_driver); +} +module_exit(ab8500_usb_exit); + +MODULE_AUTHOR("ST-Ericsson AB"); +MODULE_DESCRIPTION("AB8500 family usb transceiver driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/usb/phy/phy-am335x-control.c b/drivers/usb/phy/phy-am335x-control.c new file mode 100644 index 000000000..97e6603c7 --- /dev/null +++ b/drivers/usb/phy/phy-am335x-control.c @@ -0,0 +1,192 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/err.h> +#include <linux/of.h> +#include <linux/io.h> +#include <linux/delay.h> +#include <linux/usb/otg.h> +#include "phy-am335x-control.h" + +struct am335x_control_usb { + struct device *dev; + void __iomem *phy_reg; + void __iomem *wkup; + spinlock_t lock; + struct phy_control phy_ctrl; +}; + +#define AM335X_USB0_CTRL 0x0 +#define AM335X_USB1_CTRL 0x8 +#define AM335x_USB_WKUP 0x0 + +#define USBPHY_CM_PWRDN (1 << 0) +#define USBPHY_OTG_PWRDN (1 << 1) +#define USBPHY_OTGVDET_EN (1 << 19) +#define USBPHY_OTGSESSEND_EN (1 << 20) + +#define AM335X_PHY0_WK_EN (1 << 0) +#define AM335X_PHY1_WK_EN (1 << 8) + +static void am335x_phy_wkup(struct phy_control *phy_ctrl, u32 id, bool on) +{ + struct am335x_control_usb *usb_ctrl; + u32 val; + u32 reg; + + usb_ctrl = container_of(phy_ctrl, struct am335x_control_usb, phy_ctrl); + + switch (id) { + case 0: + reg = AM335X_PHY0_WK_EN; + break; + case 1: + reg = AM335X_PHY1_WK_EN; + break; + default: + WARN_ON(1); + return; + } + + spin_lock(&usb_ctrl->lock); + val = readl(usb_ctrl->wkup); + + if (on) + val |= reg; + else + val &= ~reg; + + writel(val, usb_ctrl->wkup); + spin_unlock(&usb_ctrl->lock); +} + +static void am335x_phy_power(struct phy_control *phy_ctrl, u32 id, + enum usb_dr_mode dr_mode, bool on) +{ + struct am335x_control_usb *usb_ctrl; + u32 val; + u32 reg; + + usb_ctrl = container_of(phy_ctrl, struct am335x_control_usb, phy_ctrl); + + switch (id) { + case 0: + reg = AM335X_USB0_CTRL; + break; + case 1: + reg = AM335X_USB1_CTRL; + break; + default: + WARN_ON(1); + return; + } + + val = readl(usb_ctrl->phy_reg + reg); + if (on) { + if (dr_mode == USB_DR_MODE_HOST) { + val &= ~(USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN | + USBPHY_OTGVDET_EN); + val |= USBPHY_OTGSESSEND_EN; + } else { + val &= ~(USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN); + val |= USBPHY_OTGVDET_EN | USBPHY_OTGSESSEND_EN; + } + } else { + val |= USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN; + } + + writel(val, usb_ctrl->phy_reg + reg); + + /* + * Give the PHY ~1ms to complete the power up operation. + * Tests have shown unstable behaviour if other USB PHY related + * registers are written too shortly after such a transition. + */ + if (on) + mdelay(1); +} + +static const struct phy_control ctrl_am335x = { + .phy_power = am335x_phy_power, + .phy_wkup = am335x_phy_wkup, +}; + +static const struct of_device_id omap_control_usb_id_table[] = { + { .compatible = "ti,am335x-usb-ctrl-module", .data = &ctrl_am335x }, + {} +}; +MODULE_DEVICE_TABLE(of, omap_control_usb_id_table); + +static struct platform_driver am335x_control_driver; +static int match(struct device *dev, const void *data) +{ + const struct device_node *node = (const struct device_node *)data; + return dev->of_node == node && + dev->driver == &am335x_control_driver.driver; +} + +struct phy_control *am335x_get_phy_control(struct device *dev) +{ + struct device_node *node; + struct am335x_control_usb *ctrl_usb; + + node = of_parse_phandle(dev->of_node, "ti,ctrl_mod", 0); + if (!node) + return NULL; + + dev = bus_find_device(&platform_bus_type, NULL, node, match); + of_node_put(node); + if (!dev) + return NULL; + + ctrl_usb = dev_get_drvdata(dev); + put_device(dev); + if (!ctrl_usb) + return NULL; + return &ctrl_usb->phy_ctrl; +} +EXPORT_SYMBOL_GPL(am335x_get_phy_control); + +static int am335x_control_usb_probe(struct platform_device *pdev) +{ + struct am335x_control_usb *ctrl_usb; + const struct of_device_id *of_id; + const struct phy_control *phy_ctrl; + + of_id = of_match_node(omap_control_usb_id_table, pdev->dev.of_node); + if (!of_id) + return -EINVAL; + + phy_ctrl = of_id->data; + + ctrl_usb = devm_kzalloc(&pdev->dev, sizeof(*ctrl_usb), GFP_KERNEL); + if (!ctrl_usb) + return -ENOMEM; + + ctrl_usb->dev = &pdev->dev; + + ctrl_usb->phy_reg = devm_platform_ioremap_resource_byname(pdev, "phy_ctrl"); + if (IS_ERR(ctrl_usb->phy_reg)) + return PTR_ERR(ctrl_usb->phy_reg); + + ctrl_usb->wkup = devm_platform_ioremap_resource_byname(pdev, "wakeup"); + if (IS_ERR(ctrl_usb->wkup)) + return PTR_ERR(ctrl_usb->wkup); + + spin_lock_init(&ctrl_usb->lock); + ctrl_usb->phy_ctrl = *phy_ctrl; + + dev_set_drvdata(ctrl_usb->dev, ctrl_usb); + return 0; +} + +static struct platform_driver am335x_control_driver = { + .probe = am335x_control_usb_probe, + .driver = { + .name = "am335x-control-usb", + .of_match_table = omap_control_usb_id_table, + }, +}; + +module_platform_driver(am335x_control_driver); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/usb/phy/phy-am335x-control.h b/drivers/usb/phy/phy-am335x-control.h new file mode 100644 index 000000000..cd4acfc6e --- /dev/null +++ b/drivers/usb/phy/phy-am335x-control.h @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _AM335x_PHY_CONTROL_H_ +#define _AM335x_PHY_CONTROL_H_ + +struct phy_control { + void (*phy_power)(struct phy_control *phy_ctrl, u32 id, + enum usb_dr_mode dr_mode, bool on); + void (*phy_wkup)(struct phy_control *phy_ctrl, u32 id, bool on); +}; + +static inline void phy_ctrl_power(struct phy_control *phy_ctrl, u32 id, + enum usb_dr_mode dr_mode, bool on) +{ + phy_ctrl->phy_power(phy_ctrl, id, dr_mode, on); +} + +static inline void phy_ctrl_wkup(struct phy_control *phy_ctrl, u32 id, bool on) +{ + phy_ctrl->phy_wkup(phy_ctrl, id, on); +} + +struct phy_control *am335x_get_phy_control(struct device *dev); + +#endif diff --git a/drivers/usb/phy/phy-am335x.c b/drivers/usb/phy/phy-am335x.c new file mode 100644 index 000000000..8524475d9 --- /dev/null +++ b/drivers/usb/phy/phy-am335x.c @@ -0,0 +1,146 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/dma-mapping.h> +#include <linux/usb/otg.h> +#include <linux/usb/usb_phy_generic.h> +#include <linux/slab.h> +#include <linux/clk.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/usb/of.h> + +#include "phy-am335x-control.h" +#include "phy-generic.h" + +struct am335x_phy { + struct usb_phy_generic usb_phy_gen; + struct phy_control *phy_ctrl; + int id; + enum usb_dr_mode dr_mode; +}; + +static int am335x_init(struct usb_phy *phy) +{ + struct am335x_phy *am_phy = dev_get_drvdata(phy->dev); + + phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, true); + return 0; +} + +static void am335x_shutdown(struct usb_phy *phy) +{ + struct am335x_phy *am_phy = dev_get_drvdata(phy->dev); + + phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, false); +} + +static int am335x_phy_probe(struct platform_device *pdev) +{ + struct am335x_phy *am_phy; + struct device *dev = &pdev->dev; + int ret; + + am_phy = devm_kzalloc(dev, sizeof(*am_phy), GFP_KERNEL); + if (!am_phy) + return -ENOMEM; + + am_phy->phy_ctrl = am335x_get_phy_control(dev); + if (!am_phy->phy_ctrl) + return -EPROBE_DEFER; + + am_phy->id = of_alias_get_id(pdev->dev.of_node, "phy"); + if (am_phy->id < 0) { + dev_err(&pdev->dev, "Missing PHY id: %d\n", am_phy->id); + return am_phy->id; + } + + am_phy->dr_mode = of_usb_get_dr_mode_by_phy(pdev->dev.of_node, -1); + + ret = usb_phy_gen_create_phy(dev, &am_phy->usb_phy_gen); + if (ret) + return ret; + + am_phy->usb_phy_gen.phy.init = am335x_init; + am_phy->usb_phy_gen.phy.shutdown = am335x_shutdown; + + platform_set_drvdata(pdev, am_phy); + device_init_wakeup(dev, true); + + /* + * If we leave PHY wakeup enabled then AM33XX wakes up + * immediately from DS0. To avoid this we mark dev->power.can_wakeup + * to false. The same is checked in suspend routine to decide + * on whether to enable PHY wakeup or not. + * PHY wakeup works fine in standby mode, there by allowing us to + * handle remote wakeup, wakeup on disconnect and connect. + */ + + device_set_wakeup_enable(dev, false); + phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, false); + + return usb_add_phy_dev(&am_phy->usb_phy_gen.phy); +} + +static int am335x_phy_remove(struct platform_device *pdev) +{ + struct am335x_phy *am_phy = platform_get_drvdata(pdev); + + usb_remove_phy(&am_phy->usb_phy_gen.phy); + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int am335x_phy_suspend(struct device *dev) +{ + struct am335x_phy *am_phy = dev_get_drvdata(dev); + + /* + * Enable phy wakeup only if dev->power.can_wakeup is true. + * Make sure to enable wakeup to support remote wakeup in + * standby mode ( same is not supported in OFF(DS0) mode). + * Enable it by doing + * echo enabled > /sys/bus/platform/devices/<usb-phy-id>/power/wakeup + */ + + if (device_may_wakeup(dev)) + phy_ctrl_wkup(am_phy->phy_ctrl, am_phy->id, true); + + phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, false); + + return 0; +} + +static int am335x_phy_resume(struct device *dev) +{ + struct am335x_phy *am_phy = dev_get_drvdata(dev); + + phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, true); + + if (device_may_wakeup(dev)) + phy_ctrl_wkup(am_phy->phy_ctrl, am_phy->id, false); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(am335x_pm_ops, am335x_phy_suspend, am335x_phy_resume); + +static const struct of_device_id am335x_phy_ids[] = { + { .compatible = "ti,am335x-usb-phy" }, + { } +}; +MODULE_DEVICE_TABLE(of, am335x_phy_ids); + +static struct platform_driver am335x_phy_driver = { + .probe = am335x_phy_probe, + .remove = am335x_phy_remove, + .driver = { + .name = "am335x-phy-driver", + .pm = &am335x_pm_ops, + .of_match_table = am335x_phy_ids, + }, +}; + +module_platform_driver(am335x_phy_driver); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/usb/phy/phy-fsl-usb.c b/drivers/usb/phy/phy-fsl-usb.c new file mode 100644 index 000000000..972704262 --- /dev/null +++ b/drivers/usb/phy/phy-fsl-usb.c @@ -0,0 +1,1018 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2007,2008 Freescale semiconductor, Inc. + * + * Author: Li Yang <LeoLi@freescale.com> + * Jerry Huang <Chang-Ming.Huang@freescale.com> + * + * Initialization based on code from Shlomi Gridish. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <linux/proc_fs.h> +#include <linux/errno.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/timer.h> +#include <linux/usb.h> +#include <linux/device.h> +#include <linux/usb/ch9.h> +#include <linux/usb/gadget.h> +#include <linux/workqueue.h> +#include <linux/time.h> +#include <linux/fsl_devices.h> +#include <linux/platform_device.h> +#include <linux/uaccess.h> + +#include <asm/unaligned.h> + +#include "phy-fsl-usb.h" + +#ifdef VERBOSE +#define VDBG(fmt, args...) pr_debug("[%s] " fmt, \ + __func__, ## args) +#else +#define VDBG(stuff...) do {} while (0) +#endif + +#define DRIVER_VERSION "Rev. 1.55" +#define DRIVER_AUTHOR "Jerry Huang/Li Yang" +#define DRIVER_DESC "Freescale USB OTG Transceiver Driver" +#define DRIVER_INFO DRIVER_DESC " " DRIVER_VERSION + +static const char driver_name[] = "fsl-usb2-otg"; + +const pm_message_t otg_suspend_state = { + .event = 1, +}; + +#define HA_DATA_PULSE + +static struct usb_dr_mmap *usb_dr_regs; +static struct fsl_otg *fsl_otg_dev; +static int srp_wait_done; + +/* FSM timers */ +struct fsl_otg_timer *a_wait_vrise_tmr, *a_wait_bcon_tmr, *a_aidl_bdis_tmr, + *b_ase0_brst_tmr, *b_se0_srp_tmr; + +/* Driver specific timers */ +struct fsl_otg_timer *b_data_pulse_tmr, *b_vbus_pulse_tmr, *b_srp_fail_tmr, + *b_srp_wait_tmr, *a_wait_enum_tmr; + +static struct list_head active_timers; + +static const struct fsl_otg_config fsl_otg_initdata = { + .otg_port = 1, +}; + +#ifdef CONFIG_PPC32 +static u32 _fsl_readl_be(const unsigned __iomem *p) +{ + return in_be32(p); +} + +static u32 _fsl_readl_le(const unsigned __iomem *p) +{ + return in_le32(p); +} + +static void _fsl_writel_be(u32 v, unsigned __iomem *p) +{ + out_be32(p, v); +} + +static void _fsl_writel_le(u32 v, unsigned __iomem *p) +{ + out_le32(p, v); +} + +static u32 (*_fsl_readl)(const unsigned __iomem *p); +static void (*_fsl_writel)(u32 v, unsigned __iomem *p); + +#define fsl_readl(p) (*_fsl_readl)((p)) +#define fsl_writel(v, p) (*_fsl_writel)((v), (p)) + +#else +#define fsl_readl(addr) readl(addr) +#define fsl_writel(val, addr) writel(val, addr) +#endif /* CONFIG_PPC32 */ + +int write_ulpi(u8 addr, u8 data) +{ + u32 temp; + + temp = 0x60000000 | (addr << 16) | data; + fsl_writel(temp, &usb_dr_regs->ulpiview); + return 0; +} + +/* -------------------------------------------------------------*/ +/* Operations that will be called from OTG Finite State Machine */ + +/* Charge vbus for vbus pulsing in SRP */ +void fsl_otg_chrg_vbus(struct otg_fsm *fsm, int on) +{ + u32 tmp; + + tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK; + + if (on) + /* stop discharging, start charging */ + tmp = (tmp & ~OTGSC_CTRL_VBUS_DISCHARGE) | + OTGSC_CTRL_VBUS_CHARGE; + else + /* stop charging */ + tmp &= ~OTGSC_CTRL_VBUS_CHARGE; + + fsl_writel(tmp, &usb_dr_regs->otgsc); +} + +/* Discharge vbus through a resistor to ground */ +void fsl_otg_dischrg_vbus(int on) +{ + u32 tmp; + + tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK; + + if (on) + /* stop charging, start discharging */ + tmp = (tmp & ~OTGSC_CTRL_VBUS_CHARGE) | + OTGSC_CTRL_VBUS_DISCHARGE; + else + /* stop discharging */ + tmp &= ~OTGSC_CTRL_VBUS_DISCHARGE; + + fsl_writel(tmp, &usb_dr_regs->otgsc); +} + +/* A-device driver vbus, controlled through PP bit in PORTSC */ +void fsl_otg_drv_vbus(struct otg_fsm *fsm, int on) +{ + u32 tmp; + + if (on) { + tmp = fsl_readl(&usb_dr_regs->portsc) & ~PORTSC_W1C_BITS; + fsl_writel(tmp | PORTSC_PORT_POWER, &usb_dr_regs->portsc); + } else { + tmp = fsl_readl(&usb_dr_regs->portsc) & + ~PORTSC_W1C_BITS & ~PORTSC_PORT_POWER; + fsl_writel(tmp, &usb_dr_regs->portsc); + } +} + +/* + * Pull-up D+, signalling connect by periperal. Also used in + * data-line pulsing in SRP + */ +void fsl_otg_loc_conn(struct otg_fsm *fsm, int on) +{ + u32 tmp; + + tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK; + + if (on) + tmp |= OTGSC_CTRL_DATA_PULSING; + else + tmp &= ~OTGSC_CTRL_DATA_PULSING; + + fsl_writel(tmp, &usb_dr_regs->otgsc); +} + +/* + * Generate SOF by host. This is controlled through suspend/resume the + * port. In host mode, controller will automatically send SOF. + * Suspend will block the data on the port. + */ +void fsl_otg_loc_sof(struct otg_fsm *fsm, int on) +{ + u32 tmp; + + tmp = fsl_readl(&fsl_otg_dev->dr_mem_map->portsc) & ~PORTSC_W1C_BITS; + if (on) + tmp |= PORTSC_PORT_FORCE_RESUME; + else + tmp |= PORTSC_PORT_SUSPEND; + + fsl_writel(tmp, &fsl_otg_dev->dr_mem_map->portsc); + +} + +/* Start SRP pulsing by data-line pulsing, followed with v-bus pulsing. */ +void fsl_otg_start_pulse(struct otg_fsm *fsm) +{ + u32 tmp; + + srp_wait_done = 0; +#ifdef HA_DATA_PULSE + tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK; + tmp |= OTGSC_HA_DATA_PULSE; + fsl_writel(tmp, &usb_dr_regs->otgsc); +#else + fsl_otg_loc_conn(1); +#endif + + fsl_otg_add_timer(fsm, b_data_pulse_tmr); +} + +void b_data_pulse_end(unsigned long foo) +{ +#ifdef HA_DATA_PULSE +#else + fsl_otg_loc_conn(0); +#endif + + /* Do VBUS pulse after data pulse */ + fsl_otg_pulse_vbus(); +} + +void fsl_otg_pulse_vbus(void) +{ + srp_wait_done = 0; + fsl_otg_chrg_vbus(&fsl_otg_dev->fsm, 1); + /* start the timer to end vbus charge */ + fsl_otg_add_timer(&fsl_otg_dev->fsm, b_vbus_pulse_tmr); +} + +void b_vbus_pulse_end(unsigned long foo) +{ + fsl_otg_chrg_vbus(&fsl_otg_dev->fsm, 0); + + /* + * As USB3300 using the same a_sess_vld and b_sess_vld voltage + * we need to discharge the bus for a while to distinguish + * residual voltage of vbus pulsing and A device pull up + */ + fsl_otg_dischrg_vbus(1); + fsl_otg_add_timer(&fsl_otg_dev->fsm, b_srp_wait_tmr); +} + +void b_srp_end(unsigned long foo) +{ + fsl_otg_dischrg_vbus(0); + srp_wait_done = 1; + + if ((fsl_otg_dev->phy.otg->state == OTG_STATE_B_SRP_INIT) && + fsl_otg_dev->fsm.b_sess_vld) + fsl_otg_dev->fsm.b_srp_done = 1; +} + +/* + * Workaround for a_host suspending too fast. When a_bus_req=0, + * a_host will start by SRP. It needs to set b_hnp_enable before + * actually suspending to start HNP + */ +void a_wait_enum(unsigned long foo) +{ + VDBG("a_wait_enum timeout\n"); + if (!fsl_otg_dev->phy.otg->host->b_hnp_enable) + fsl_otg_add_timer(&fsl_otg_dev->fsm, a_wait_enum_tmr); + else + otg_statemachine(&fsl_otg_dev->fsm); +} + +/* The timeout callback function to set time out bit */ +void set_tmout(unsigned long indicator) +{ + *(int *)indicator = 1; +} + +/* Initialize timers */ +int fsl_otg_init_timers(struct otg_fsm *fsm) +{ + /* FSM used timers */ + a_wait_vrise_tmr = otg_timer_initializer(&set_tmout, TA_WAIT_VRISE, + (unsigned long)&fsm->a_wait_vrise_tmout); + if (!a_wait_vrise_tmr) + return -ENOMEM; + + a_wait_bcon_tmr = otg_timer_initializer(&set_tmout, TA_WAIT_BCON, + (unsigned long)&fsm->a_wait_bcon_tmout); + if (!a_wait_bcon_tmr) + return -ENOMEM; + + a_aidl_bdis_tmr = otg_timer_initializer(&set_tmout, TA_AIDL_BDIS, + (unsigned long)&fsm->a_aidl_bdis_tmout); + if (!a_aidl_bdis_tmr) + return -ENOMEM; + + b_ase0_brst_tmr = otg_timer_initializer(&set_tmout, TB_ASE0_BRST, + (unsigned long)&fsm->b_ase0_brst_tmout); + if (!b_ase0_brst_tmr) + return -ENOMEM; + + b_se0_srp_tmr = otg_timer_initializer(&set_tmout, TB_SE0_SRP, + (unsigned long)&fsm->b_se0_srp); + if (!b_se0_srp_tmr) + return -ENOMEM; + + b_srp_fail_tmr = otg_timer_initializer(&set_tmout, TB_SRP_FAIL, + (unsigned long)&fsm->b_srp_done); + if (!b_srp_fail_tmr) + return -ENOMEM; + + a_wait_enum_tmr = otg_timer_initializer(&a_wait_enum, 10, + (unsigned long)&fsm); + if (!a_wait_enum_tmr) + return -ENOMEM; + + /* device driver used timers */ + b_srp_wait_tmr = otg_timer_initializer(&b_srp_end, TB_SRP_WAIT, 0); + if (!b_srp_wait_tmr) + return -ENOMEM; + + b_data_pulse_tmr = otg_timer_initializer(&b_data_pulse_end, + TB_DATA_PLS, 0); + if (!b_data_pulse_tmr) + return -ENOMEM; + + b_vbus_pulse_tmr = otg_timer_initializer(&b_vbus_pulse_end, + TB_VBUS_PLS, 0); + if (!b_vbus_pulse_tmr) + return -ENOMEM; + + return 0; +} + +/* Uninitialize timers */ +void fsl_otg_uninit_timers(void) +{ + /* FSM used timers */ + kfree(a_wait_vrise_tmr); + kfree(a_wait_bcon_tmr); + kfree(a_aidl_bdis_tmr); + kfree(b_ase0_brst_tmr); + kfree(b_se0_srp_tmr); + kfree(b_srp_fail_tmr); + kfree(a_wait_enum_tmr); + + /* device driver used timers */ + kfree(b_srp_wait_tmr); + kfree(b_data_pulse_tmr); + kfree(b_vbus_pulse_tmr); +} + +static struct fsl_otg_timer *fsl_otg_get_timer(enum otg_fsm_timer t) +{ + struct fsl_otg_timer *timer; + + /* REVISIT: use array of pointers to timers instead */ + switch (t) { + case A_WAIT_VRISE: + timer = a_wait_vrise_tmr; + break; + case A_WAIT_BCON: + timer = a_wait_vrise_tmr; + break; + case A_AIDL_BDIS: + timer = a_wait_vrise_tmr; + break; + case B_ASE0_BRST: + timer = a_wait_vrise_tmr; + break; + case B_SE0_SRP: + timer = a_wait_vrise_tmr; + break; + case B_SRP_FAIL: + timer = a_wait_vrise_tmr; + break; + case A_WAIT_ENUM: + timer = a_wait_vrise_tmr; + break; + default: + timer = NULL; + } + + return timer; +} + +/* Add timer to timer list */ +void fsl_otg_add_timer(struct otg_fsm *fsm, void *gtimer) +{ + struct fsl_otg_timer *timer = gtimer; + struct fsl_otg_timer *tmp_timer; + + /* + * Check if the timer is already in the active list, + * if so update timer count + */ + list_for_each_entry(tmp_timer, &active_timers, list) + if (tmp_timer == timer) { + timer->count = timer->expires; + return; + } + timer->count = timer->expires; + list_add_tail(&timer->list, &active_timers); +} + +static void fsl_otg_fsm_add_timer(struct otg_fsm *fsm, enum otg_fsm_timer t) +{ + struct fsl_otg_timer *timer; + + timer = fsl_otg_get_timer(t); + if (!timer) + return; + + fsl_otg_add_timer(fsm, timer); +} + +/* Remove timer from the timer list; clear timeout status */ +void fsl_otg_del_timer(struct otg_fsm *fsm, void *gtimer) +{ + struct fsl_otg_timer *timer = gtimer; + struct fsl_otg_timer *tmp_timer, *del_tmp; + + list_for_each_entry_safe(tmp_timer, del_tmp, &active_timers, list) + if (tmp_timer == timer) + list_del(&timer->list); +} + +static void fsl_otg_fsm_del_timer(struct otg_fsm *fsm, enum otg_fsm_timer t) +{ + struct fsl_otg_timer *timer; + + timer = fsl_otg_get_timer(t); + if (!timer) + return; + + fsl_otg_del_timer(fsm, timer); +} + +/* Reset controller, not reset the bus */ +void otg_reset_controller(void) +{ + u32 command; + + command = fsl_readl(&usb_dr_regs->usbcmd); + command |= (1 << 1); + fsl_writel(command, &usb_dr_regs->usbcmd); + while (fsl_readl(&usb_dr_regs->usbcmd) & (1 << 1)) + ; +} + +/* Call suspend/resume routines in host driver */ +int fsl_otg_start_host(struct otg_fsm *fsm, int on) +{ + struct usb_otg *otg = fsm->otg; + struct device *dev; + struct fsl_otg *otg_dev = + container_of(otg->usb_phy, struct fsl_otg, phy); + u32 retval = 0; + + if (!otg->host) + return -ENODEV; + dev = otg->host->controller; + + /* + * Update a_vbus_vld state as a_vbus_vld int is disabled + * in device mode + */ + fsm->a_vbus_vld = + !!(fsl_readl(&usb_dr_regs->otgsc) & OTGSC_STS_A_VBUS_VALID); + if (on) { + /* start fsl usb host controller */ + if (otg_dev->host_working) + goto end; + else { + otg_reset_controller(); + VDBG("host on......\n"); + if (dev->driver->pm && dev->driver->pm->resume) { + retval = dev->driver->pm->resume(dev); + if (fsm->id) { + /* default-b */ + fsl_otg_drv_vbus(fsm, 1); + /* + * Workaround: b_host can't driver + * vbus, but PP in PORTSC needs to + * be 1 for host to work. + * So we set drv_vbus bit in + * transceiver to 0 thru ULPI. + */ + write_ulpi(0x0c, 0x20); + } + } + + otg_dev->host_working = 1; + } + } else { + /* stop fsl usb host controller */ + if (!otg_dev->host_working) + goto end; + else { + VDBG("host off......\n"); + if (dev && dev->driver) { + if (dev->driver->pm && dev->driver->pm->suspend) + retval = dev->driver->pm->suspend(dev); + if (fsm->id) + /* default-b */ + fsl_otg_drv_vbus(fsm, 0); + } + otg_dev->host_working = 0; + } + } +end: + return retval; +} + +/* + * Call suspend and resume function in udc driver + * to stop and start udc driver. + */ +int fsl_otg_start_gadget(struct otg_fsm *fsm, int on) +{ + struct usb_otg *otg = fsm->otg; + struct device *dev; + + if (!otg->gadget || !otg->gadget->dev.parent) + return -ENODEV; + + VDBG("gadget %s\n", on ? "on" : "off"); + dev = otg->gadget->dev.parent; + + if (on) { + if (dev->driver->resume) + dev->driver->resume(dev); + } else { + if (dev->driver->suspend) + dev->driver->suspend(dev, otg_suspend_state); + } + + return 0; +} + +/* + * Called by initialization code of host driver. Register host controller + * to the OTG. Suspend host for OTG role detection. + */ +static int fsl_otg_set_host(struct usb_otg *otg, struct usb_bus *host) +{ + struct fsl_otg *otg_dev; + + if (!otg) + return -ENODEV; + + otg_dev = container_of(otg->usb_phy, struct fsl_otg, phy); + if (otg_dev != fsl_otg_dev) + return -ENODEV; + + otg->host = host; + + otg_dev->fsm.a_bus_drop = 0; + otg_dev->fsm.a_bus_req = 1; + + if (host) { + VDBG("host off......\n"); + + otg->host->otg_port = fsl_otg_initdata.otg_port; + otg->host->is_b_host = otg_dev->fsm.id; + /* + * must leave time for hub_wq to finish its thing + * before yanking the host driver out from under it, + * so suspend the host after a short delay. + */ + otg_dev->host_working = 1; + schedule_delayed_work(&otg_dev->otg_event, 100); + return 0; + } else { + /* host driver going away */ + if (!(fsl_readl(&otg_dev->dr_mem_map->otgsc) & + OTGSC_STS_USB_ID)) { + /* Mini-A cable connected */ + struct otg_fsm *fsm = &otg_dev->fsm; + + otg->state = OTG_STATE_UNDEFINED; + fsm->protocol = PROTO_UNDEF; + } + } + + otg_dev->host_working = 0; + + otg_statemachine(&otg_dev->fsm); + + return 0; +} + +/* Called by initialization code of udc. Register udc to OTG. */ +static int fsl_otg_set_peripheral(struct usb_otg *otg, + struct usb_gadget *gadget) +{ + struct fsl_otg *otg_dev; + + if (!otg) + return -ENODEV; + + otg_dev = container_of(otg->usb_phy, struct fsl_otg, phy); + VDBG("otg_dev 0x%x\n", (int)otg_dev); + VDBG("fsl_otg_dev 0x%x\n", (int)fsl_otg_dev); + if (otg_dev != fsl_otg_dev) + return -ENODEV; + + if (!gadget) { + if (!otg->default_a) + otg->gadget->ops->vbus_draw(otg->gadget, 0); + usb_gadget_vbus_disconnect(otg->gadget); + otg->gadget = 0; + otg_dev->fsm.b_bus_req = 0; + otg_statemachine(&otg_dev->fsm); + return 0; + } + + otg->gadget = gadget; + otg->gadget->is_a_peripheral = !otg_dev->fsm.id; + + otg_dev->fsm.b_bus_req = 1; + + /* start the gadget right away if the ID pin says Mini-B */ + pr_debug("ID pin=%d\n", otg_dev->fsm.id); + if (otg_dev->fsm.id == 1) { + fsl_otg_start_host(&otg_dev->fsm, 0); + otg_drv_vbus(&otg_dev->fsm, 0); + fsl_otg_start_gadget(&otg_dev->fsm, 1); + } + + return 0; +} + +/* + * Delayed pin detect interrupt processing. + * + * When the Mini-A cable is disconnected from the board, + * the pin-detect interrupt happens before the disconnect + * interrupts for the connected device(s). In order to + * process the disconnect interrupt(s) prior to switching + * roles, the pin-detect interrupts are delayed, and handled + * by this routine. + */ +static void fsl_otg_event(struct work_struct *work) +{ + struct fsl_otg *og = container_of(work, struct fsl_otg, otg_event.work); + struct otg_fsm *fsm = &og->fsm; + + if (fsm->id) { /* switch to gadget */ + fsl_otg_start_host(fsm, 0); + otg_drv_vbus(fsm, 0); + fsl_otg_start_gadget(fsm, 1); + } +} + +/* B-device start SRP */ +static int fsl_otg_start_srp(struct usb_otg *otg) +{ + struct fsl_otg *otg_dev; + + if (!otg || otg->state != OTG_STATE_B_IDLE) + return -ENODEV; + + otg_dev = container_of(otg->usb_phy, struct fsl_otg, phy); + if (otg_dev != fsl_otg_dev) + return -ENODEV; + + otg_dev->fsm.b_bus_req = 1; + otg_statemachine(&otg_dev->fsm); + + return 0; +} + +/* A_host suspend will call this function to start hnp */ +static int fsl_otg_start_hnp(struct usb_otg *otg) +{ + struct fsl_otg *otg_dev; + + if (!otg) + return -ENODEV; + + otg_dev = container_of(otg->usb_phy, struct fsl_otg, phy); + if (otg_dev != fsl_otg_dev) + return -ENODEV; + + pr_debug("start_hnp...\n"); + + /* clear a_bus_req to enter a_suspend state */ + otg_dev->fsm.a_bus_req = 0; + otg_statemachine(&otg_dev->fsm); + + return 0; +} + +/* + * Interrupt handler. OTG/host/peripheral share the same int line. + * OTG driver clears OTGSC interrupts and leaves USB interrupts + * intact. It needs to have knowledge of some USB interrupts + * such as port change. + */ +irqreturn_t fsl_otg_isr(int irq, void *dev_id) +{ + struct otg_fsm *fsm = &((struct fsl_otg *)dev_id)->fsm; + struct usb_otg *otg = ((struct fsl_otg *)dev_id)->phy.otg; + u32 otg_int_src, otg_sc; + + otg_sc = fsl_readl(&usb_dr_regs->otgsc); + otg_int_src = otg_sc & OTGSC_INTSTS_MASK & (otg_sc >> 8); + + /* Only clear otg interrupts */ + fsl_writel(otg_sc, &usb_dr_regs->otgsc); + + /*FIXME: ID change not generate when init to 0 */ + fsm->id = (otg_sc & OTGSC_STS_USB_ID) ? 1 : 0; + otg->default_a = (fsm->id == 0); + + /* process OTG interrupts */ + if (otg_int_src) { + if (otg_int_src & OTGSC_INTSTS_USB_ID) { + fsm->id = (otg_sc & OTGSC_STS_USB_ID) ? 1 : 0; + otg->default_a = (fsm->id == 0); + /* clear conn information */ + if (fsm->id) + fsm->b_conn = 0; + else + fsm->a_conn = 0; + + if (otg->host) + otg->host->is_b_host = fsm->id; + if (otg->gadget) + otg->gadget->is_a_peripheral = !fsm->id; + VDBG("ID int (ID is %d)\n", fsm->id); + + if (fsm->id) { /* switch to gadget */ + schedule_delayed_work( + &((struct fsl_otg *)dev_id)->otg_event, + 100); + } else { /* switch to host */ + cancel_delayed_work(& + ((struct fsl_otg *)dev_id)-> + otg_event); + fsl_otg_start_gadget(fsm, 0); + otg_drv_vbus(fsm, 1); + fsl_otg_start_host(fsm, 1); + } + return IRQ_HANDLED; + } + } + return IRQ_NONE; +} + +static struct otg_fsm_ops fsl_otg_ops = { + .chrg_vbus = fsl_otg_chrg_vbus, + .drv_vbus = fsl_otg_drv_vbus, + .loc_conn = fsl_otg_loc_conn, + .loc_sof = fsl_otg_loc_sof, + .start_pulse = fsl_otg_start_pulse, + + .add_timer = fsl_otg_fsm_add_timer, + .del_timer = fsl_otg_fsm_del_timer, + + .start_host = fsl_otg_start_host, + .start_gadget = fsl_otg_start_gadget, +}; + +/* Initialize the global variable fsl_otg_dev and request IRQ for OTG */ +static int fsl_otg_conf(struct platform_device *pdev) +{ + struct fsl_otg *fsl_otg_tc; + int status; + + if (fsl_otg_dev) + return 0; + + /* allocate space to fsl otg device */ + fsl_otg_tc = kzalloc(sizeof(struct fsl_otg), GFP_KERNEL); + if (!fsl_otg_tc) + return -ENOMEM; + + fsl_otg_tc->phy.otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL); + if (!fsl_otg_tc->phy.otg) { + kfree(fsl_otg_tc); + return -ENOMEM; + } + + INIT_DELAYED_WORK(&fsl_otg_tc->otg_event, fsl_otg_event); + + INIT_LIST_HEAD(&active_timers); + status = fsl_otg_init_timers(&fsl_otg_tc->fsm); + if (status) { + pr_info("Couldn't init OTG timers\n"); + goto err; + } + mutex_init(&fsl_otg_tc->fsm.lock); + + /* Set OTG state machine operations */ + fsl_otg_tc->fsm.ops = &fsl_otg_ops; + + /* initialize the otg structure */ + fsl_otg_tc->phy.label = DRIVER_DESC; + fsl_otg_tc->phy.dev = &pdev->dev; + + fsl_otg_tc->phy.otg->usb_phy = &fsl_otg_tc->phy; + fsl_otg_tc->phy.otg->set_host = fsl_otg_set_host; + fsl_otg_tc->phy.otg->set_peripheral = fsl_otg_set_peripheral; + fsl_otg_tc->phy.otg->start_hnp = fsl_otg_start_hnp; + fsl_otg_tc->phy.otg->start_srp = fsl_otg_start_srp; + + fsl_otg_dev = fsl_otg_tc; + + /* Store the otg transceiver */ + status = usb_add_phy(&fsl_otg_tc->phy, USB_PHY_TYPE_USB2); + if (status) { + pr_warn(FSL_OTG_NAME ": unable to register OTG transceiver.\n"); + goto err; + } + + return 0; +err: + fsl_otg_uninit_timers(); + kfree(fsl_otg_tc->phy.otg); + kfree(fsl_otg_tc); + return status; +} + +/* OTG Initialization */ +int usb_otg_start(struct platform_device *pdev) +{ + struct fsl_otg *p_otg; + struct usb_phy *otg_trans = usb_get_phy(USB_PHY_TYPE_USB2); + struct otg_fsm *fsm; + int status; + struct resource *res; + u32 temp; + struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev); + + p_otg = container_of(otg_trans, struct fsl_otg, phy); + fsm = &p_otg->fsm; + + /* Initialize the state machine structure with default values */ + SET_OTG_STATE(otg_trans, OTG_STATE_UNDEFINED); + fsm->otg = p_otg->phy.otg; + + /* We don't require predefined MEM/IRQ resource index */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENXIO; + + /* We don't request_mem_region here to enable resource sharing + * with host/device */ + + usb_dr_regs = ioremap(res->start, sizeof(struct usb_dr_mmap)); + p_otg->dr_mem_map = (struct usb_dr_mmap *)usb_dr_regs; + pdata->regs = (void *)usb_dr_regs; + + if (pdata->init && pdata->init(pdev) != 0) + return -EINVAL; + +#ifdef CONFIG_PPC32 + if (pdata->big_endian_mmio) { + _fsl_readl = _fsl_readl_be; + _fsl_writel = _fsl_writel_be; + } else { + _fsl_readl = _fsl_readl_le; + _fsl_writel = _fsl_writel_le; + } +#endif + + /* request irq */ + p_otg->irq = platform_get_irq(pdev, 0); + if (p_otg->irq < 0) + return p_otg->irq; + status = request_irq(p_otg->irq, fsl_otg_isr, + IRQF_SHARED, driver_name, p_otg); + if (status) { + dev_dbg(p_otg->phy.dev, "can't get IRQ %d, error %d\n", + p_otg->irq, status); + iounmap(p_otg->dr_mem_map); + kfree(p_otg->phy.otg); + kfree(p_otg); + return status; + } + + /* stop the controller */ + temp = fsl_readl(&p_otg->dr_mem_map->usbcmd); + temp &= ~USB_CMD_RUN_STOP; + fsl_writel(temp, &p_otg->dr_mem_map->usbcmd); + + /* reset the controller */ + temp = fsl_readl(&p_otg->dr_mem_map->usbcmd); + temp |= USB_CMD_CTRL_RESET; + fsl_writel(temp, &p_otg->dr_mem_map->usbcmd); + + /* wait reset completed */ + while (fsl_readl(&p_otg->dr_mem_map->usbcmd) & USB_CMD_CTRL_RESET) + ; + + /* configure the VBUSHS as IDLE(both host and device) */ + temp = USB_MODE_STREAM_DISABLE | (pdata->es ? USB_MODE_ES : 0); + fsl_writel(temp, &p_otg->dr_mem_map->usbmode); + + /* configure PHY interface */ + temp = fsl_readl(&p_otg->dr_mem_map->portsc); + temp &= ~(PORTSC_PHY_TYPE_SEL | PORTSC_PTW); + switch (pdata->phy_mode) { + case FSL_USB2_PHY_ULPI: + temp |= PORTSC_PTS_ULPI; + break; + case FSL_USB2_PHY_UTMI_WIDE: + temp |= PORTSC_PTW_16BIT; + fallthrough; + case FSL_USB2_PHY_UTMI: + temp |= PORTSC_PTS_UTMI; + fallthrough; + default: + break; + } + fsl_writel(temp, &p_otg->dr_mem_map->portsc); + + if (pdata->have_sysif_regs) { + /* configure control enable IO output, big endian register */ + temp = __raw_readl(&p_otg->dr_mem_map->control); + temp |= USB_CTRL_IOENB; + __raw_writel(temp, &p_otg->dr_mem_map->control); + } + + /* disable all interrupt and clear all OTGSC status */ + temp = fsl_readl(&p_otg->dr_mem_map->otgsc); + temp &= ~OTGSC_INTERRUPT_ENABLE_BITS_MASK; + temp |= OTGSC_INTERRUPT_STATUS_BITS_MASK | OTGSC_CTRL_VBUS_DISCHARGE; + fsl_writel(temp, &p_otg->dr_mem_map->otgsc); + + /* + * The identification (id) input is FALSE when a Mini-A plug is inserted + * in the devices Mini-AB receptacle. Otherwise, this input is TRUE. + * Also: record initial state of ID pin + */ + if (fsl_readl(&p_otg->dr_mem_map->otgsc) & OTGSC_STS_USB_ID) { + p_otg->phy.otg->state = OTG_STATE_UNDEFINED; + p_otg->fsm.id = 1; + } else { + p_otg->phy.otg->state = OTG_STATE_A_IDLE; + p_otg->fsm.id = 0; + } + + pr_debug("initial ID pin=%d\n", p_otg->fsm.id); + + /* enable OTG ID pin interrupt */ + temp = fsl_readl(&p_otg->dr_mem_map->otgsc); + temp |= OTGSC_INTR_USB_ID_EN; + temp &= ~(OTGSC_CTRL_VBUS_DISCHARGE | OTGSC_INTR_1MS_TIMER_EN); + fsl_writel(temp, &p_otg->dr_mem_map->otgsc); + + return 0; +} + +static int fsl_otg_probe(struct platform_device *pdev) +{ + int ret; + + if (!dev_get_platdata(&pdev->dev)) + return -ENODEV; + + /* configure the OTG */ + ret = fsl_otg_conf(pdev); + if (ret) { + dev_err(&pdev->dev, "Couldn't configure OTG module\n"); + return ret; + } + + /* start OTG */ + ret = usb_otg_start(pdev); + if (ret) { + dev_err(&pdev->dev, "Can't init FSL OTG device\n"); + return ret; + } + + return ret; +} + +static int fsl_otg_remove(struct platform_device *pdev) +{ + struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev); + + usb_remove_phy(&fsl_otg_dev->phy); + free_irq(fsl_otg_dev->irq, fsl_otg_dev); + + iounmap((void *)usb_dr_regs); + + fsl_otg_uninit_timers(); + kfree(fsl_otg_dev->phy.otg); + kfree(fsl_otg_dev); + + if (pdata->exit) + pdata->exit(pdev); + + return 0; +} + +struct platform_driver fsl_otg_driver = { + .probe = fsl_otg_probe, + .remove = fsl_otg_remove, + .driver = { + .name = driver_name, + .owner = THIS_MODULE, + }, +}; + +module_platform_driver(fsl_otg_driver); + +MODULE_DESCRIPTION(DRIVER_INFO); +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_LICENSE("GPL"); diff --git a/drivers/usb/phy/phy-fsl-usb.h b/drivers/usb/phy/phy-fsl-usb.h new file mode 100644 index 000000000..d70341ae5 --- /dev/null +++ b/drivers/usb/phy/phy-fsl-usb.h @@ -0,0 +1,378 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* Copyright (C) 2007,2008 Freescale Semiconductor, Inc. */ + +#include <linux/usb/otg-fsm.h> +#include <linux/usb/otg.h> +#include <linux/ioctl.h> + +/* USB Command Register Bit Masks */ +#define USB_CMD_RUN_STOP (0x1<<0) +#define USB_CMD_CTRL_RESET (0x1<<1) +#define USB_CMD_PERIODIC_SCHEDULE_EN (0x1<<4) +#define USB_CMD_ASYNC_SCHEDULE_EN (0x1<<5) +#define USB_CMD_INT_AA_DOORBELL (0x1<<6) +#define USB_CMD_ASP (0x3<<8) +#define USB_CMD_ASYNC_SCH_PARK_EN (0x1<<11) +#define USB_CMD_SUTW (0x1<<13) +#define USB_CMD_ATDTW (0x1<<14) +#define USB_CMD_ITC (0xFF<<16) + +/* bit 15,3,2 are frame list size */ +#define USB_CMD_FRAME_SIZE_1024 (0x0<<15 | 0x0<<2) +#define USB_CMD_FRAME_SIZE_512 (0x0<<15 | 0x1<<2) +#define USB_CMD_FRAME_SIZE_256 (0x0<<15 | 0x2<<2) +#define USB_CMD_FRAME_SIZE_128 (0x0<<15 | 0x3<<2) +#define USB_CMD_FRAME_SIZE_64 (0x1<<15 | 0x0<<2) +#define USB_CMD_FRAME_SIZE_32 (0x1<<15 | 0x1<<2) +#define USB_CMD_FRAME_SIZE_16 (0x1<<15 | 0x2<<2) +#define USB_CMD_FRAME_SIZE_8 (0x1<<15 | 0x3<<2) + +/* bit 9-8 are async schedule park mode count */ +#define USB_CMD_ASP_00 (0x0<<8) +#define USB_CMD_ASP_01 (0x1<<8) +#define USB_CMD_ASP_10 (0x2<<8) +#define USB_CMD_ASP_11 (0x3<<8) +#define USB_CMD_ASP_BIT_POS (8) + +/* bit 23-16 are interrupt threshold control */ +#define USB_CMD_ITC_NO_THRESHOLD (0x00<<16) +#define USB_CMD_ITC_1_MICRO_FRM (0x01<<16) +#define USB_CMD_ITC_2_MICRO_FRM (0x02<<16) +#define USB_CMD_ITC_4_MICRO_FRM (0x04<<16) +#define USB_CMD_ITC_8_MICRO_FRM (0x08<<16) +#define USB_CMD_ITC_16_MICRO_FRM (0x10<<16) +#define USB_CMD_ITC_32_MICRO_FRM (0x20<<16) +#define USB_CMD_ITC_64_MICRO_FRM (0x40<<16) +#define USB_CMD_ITC_BIT_POS (16) + +/* USB Status Register Bit Masks */ +#define USB_STS_INT (0x1<<0) +#define USB_STS_ERR (0x1<<1) +#define USB_STS_PORT_CHANGE (0x1<<2) +#define USB_STS_FRM_LST_ROLL (0x1<<3) +#define USB_STS_SYS_ERR (0x1<<4) +#define USB_STS_IAA (0x1<<5) +#define USB_STS_RESET_RECEIVED (0x1<<6) +#define USB_STS_SOF (0x1<<7) +#define USB_STS_DCSUSPEND (0x1<<8) +#define USB_STS_HC_HALTED (0x1<<12) +#define USB_STS_RCL (0x1<<13) +#define USB_STS_PERIODIC_SCHEDULE (0x1<<14) +#define USB_STS_ASYNC_SCHEDULE (0x1<<15) + +/* USB Interrupt Enable Register Bit Masks */ +#define USB_INTR_INT_EN (0x1<<0) +#define USB_INTR_ERR_INT_EN (0x1<<1) +#define USB_INTR_PC_DETECT_EN (0x1<<2) +#define USB_INTR_FRM_LST_ROLL_EN (0x1<<3) +#define USB_INTR_SYS_ERR_EN (0x1<<4) +#define USB_INTR_ASYN_ADV_EN (0x1<<5) +#define USB_INTR_RESET_EN (0x1<<6) +#define USB_INTR_SOF_EN (0x1<<7) +#define USB_INTR_DEVICE_SUSPEND (0x1<<8) + +/* Device Address bit masks */ +#define USB_DEVICE_ADDRESS_MASK (0x7F<<25) +#define USB_DEVICE_ADDRESS_BIT_POS (25) +/* PORTSC Register Bit Masks,Only one PORT in OTG mode*/ +#define PORTSC_CURRENT_CONNECT_STATUS (0x1<<0) +#define PORTSC_CONNECT_STATUS_CHANGE (0x1<<1) +#define PORTSC_PORT_ENABLE (0x1<<2) +#define PORTSC_PORT_EN_DIS_CHANGE (0x1<<3) +#define PORTSC_OVER_CURRENT_ACT (0x1<<4) +#define PORTSC_OVER_CUURENT_CHG (0x1<<5) +#define PORTSC_PORT_FORCE_RESUME (0x1<<6) +#define PORTSC_PORT_SUSPEND (0x1<<7) +#define PORTSC_PORT_RESET (0x1<<8) +#define PORTSC_LINE_STATUS_BITS (0x3<<10) +#define PORTSC_PORT_POWER (0x1<<12) +#define PORTSC_PORT_INDICTOR_CTRL (0x3<<14) +#define PORTSC_PORT_TEST_CTRL (0xF<<16) +#define PORTSC_WAKE_ON_CONNECT_EN (0x1<<20) +#define PORTSC_WAKE_ON_CONNECT_DIS (0x1<<21) +#define PORTSC_WAKE_ON_OVER_CURRENT (0x1<<22) +#define PORTSC_PHY_LOW_POWER_SPD (0x1<<23) +#define PORTSC_PORT_FORCE_FULL_SPEED (0x1<<24) +#define PORTSC_PORT_SPEED_MASK (0x3<<26) +#define PORTSC_TRANSCEIVER_WIDTH (0x1<<28) +#define PORTSC_PHY_TYPE_SEL (0x3<<30) +/* bit 11-10 are line status */ +#define PORTSC_LINE_STATUS_SE0 (0x0<<10) +#define PORTSC_LINE_STATUS_JSTATE (0x1<<10) +#define PORTSC_LINE_STATUS_KSTATE (0x2<<10) +#define PORTSC_LINE_STATUS_UNDEF (0x3<<10) +#define PORTSC_LINE_STATUS_BIT_POS (10) + +/* bit 15-14 are port indicator control */ +#define PORTSC_PIC_OFF (0x0<<14) +#define PORTSC_PIC_AMBER (0x1<<14) +#define PORTSC_PIC_GREEN (0x2<<14) +#define PORTSC_PIC_UNDEF (0x3<<14) +#define PORTSC_PIC_BIT_POS (14) + +/* bit 19-16 are port test control */ +#define PORTSC_PTC_DISABLE (0x0<<16) +#define PORTSC_PTC_JSTATE (0x1<<16) +#define PORTSC_PTC_KSTATE (0x2<<16) +#define PORTSC_PTC_SEQNAK (0x3<<16) +#define PORTSC_PTC_PACKET (0x4<<16) +#define PORTSC_PTC_FORCE_EN (0x5<<16) +#define PORTSC_PTC_BIT_POS (16) + +/* bit 27-26 are port speed */ +#define PORTSC_PORT_SPEED_FULL (0x0<<26) +#define PORTSC_PORT_SPEED_LOW (0x1<<26) +#define PORTSC_PORT_SPEED_HIGH (0x2<<26) +#define PORTSC_PORT_SPEED_UNDEF (0x3<<26) +#define PORTSC_SPEED_BIT_POS (26) + +/* bit 28 is parallel transceiver width for UTMI interface */ +#define PORTSC_PTW (0x1<<28) +#define PORTSC_PTW_8BIT (0x0<<28) +#define PORTSC_PTW_16BIT (0x1<<28) + +/* bit 31-30 are port transceiver select */ +#define PORTSC_PTS_UTMI (0x0<<30) +#define PORTSC_PTS_ULPI (0x2<<30) +#define PORTSC_PTS_FSLS_SERIAL (0x3<<30) +#define PORTSC_PTS_BIT_POS (30) + +#define PORTSC_W1C_BITS \ + (PORTSC_CONNECT_STATUS_CHANGE | \ + PORTSC_PORT_EN_DIS_CHANGE | \ + PORTSC_OVER_CUURENT_CHG) + +/* OTG Status Control Register Bit Masks */ +#define OTGSC_CTRL_VBUS_DISCHARGE (0x1<<0) +#define OTGSC_CTRL_VBUS_CHARGE (0x1<<1) +#define OTGSC_CTRL_OTG_TERMINATION (0x1<<3) +#define OTGSC_CTRL_DATA_PULSING (0x1<<4) +#define OTGSC_CTRL_ID_PULL_EN (0x1<<5) +#define OTGSC_HA_DATA_PULSE (0x1<<6) +#define OTGSC_HA_BA (0x1<<7) +#define OTGSC_STS_USB_ID (0x1<<8) +#define OTGSC_STS_A_VBUS_VALID (0x1<<9) +#define OTGSC_STS_A_SESSION_VALID (0x1<<10) +#define OTGSC_STS_B_SESSION_VALID (0x1<<11) +#define OTGSC_STS_B_SESSION_END (0x1<<12) +#define OTGSC_STS_1MS_TOGGLE (0x1<<13) +#define OTGSC_STS_DATA_PULSING (0x1<<14) +#define OTGSC_INTSTS_USB_ID (0x1<<16) +#define OTGSC_INTSTS_A_VBUS_VALID (0x1<<17) +#define OTGSC_INTSTS_A_SESSION_VALID (0x1<<18) +#define OTGSC_INTSTS_B_SESSION_VALID (0x1<<19) +#define OTGSC_INTSTS_B_SESSION_END (0x1<<20) +#define OTGSC_INTSTS_1MS (0x1<<21) +#define OTGSC_INTSTS_DATA_PULSING (0x1<<22) +#define OTGSC_INTR_USB_ID_EN (0x1<<24) +#define OTGSC_INTR_A_VBUS_VALID_EN (0x1<<25) +#define OTGSC_INTR_A_SESSION_VALID_EN (0x1<<26) +#define OTGSC_INTR_B_SESSION_VALID_EN (0x1<<27) +#define OTGSC_INTR_B_SESSION_END_EN (0x1<<28) +#define OTGSC_INTR_1MS_TIMER_EN (0x1<<29) +#define OTGSC_INTR_DATA_PULSING_EN (0x1<<30) +#define OTGSC_INTSTS_MASK (0x00ff0000) + +/* USB MODE Register Bit Masks */ +#define USB_MODE_CTRL_MODE_IDLE (0x0<<0) +#define USB_MODE_CTRL_MODE_DEVICE (0x2<<0) +#define USB_MODE_CTRL_MODE_HOST (0x3<<0) +#define USB_MODE_CTRL_MODE_RSV (0x1<<0) +#define USB_MODE_SETUP_LOCK_OFF (0x1<<3) +#define USB_MODE_STREAM_DISABLE (0x1<<4) +#define USB_MODE_ES (0x1<<2) /* Endian Select */ + +/* control Register Bit Masks */ +#define USB_CTRL_IOENB (0x1<<2) +#define USB_CTRL_ULPI_INT0EN (0x1<<0) + +/* BCSR5 */ +#define BCSR5_INT_USB (0x02) + +/* USB module clk cfg */ +#define SCCR_OFFS (0xA08) +#define SCCR_USB_CLK_DISABLE (0x00000000) /* USB clk disable */ +#define SCCR_USB_MPHCM_11 (0x00c00000) +#define SCCR_USB_MPHCM_01 (0x00400000) +#define SCCR_USB_MPHCM_10 (0x00800000) +#define SCCR_USB_DRCM_11 (0x00300000) +#define SCCR_USB_DRCM_01 (0x00100000) +#define SCCR_USB_DRCM_10 (0x00200000) + +#define SICRL_OFFS (0x114) +#define SICRL_USB0 (0x40000000) +#define SICRL_USB1 (0x20000000) + +#define SICRH_OFFS (0x118) +#define SICRH_USB_UTMI (0x00020000) + +/* OTG interrupt enable bit masks */ +#define OTGSC_INTERRUPT_ENABLE_BITS_MASK \ + (OTGSC_INTR_USB_ID_EN | \ + OTGSC_INTR_1MS_TIMER_EN | \ + OTGSC_INTR_A_VBUS_VALID_EN | \ + OTGSC_INTR_A_SESSION_VALID_EN | \ + OTGSC_INTR_B_SESSION_VALID_EN | \ + OTGSC_INTR_B_SESSION_END_EN | \ + OTGSC_INTR_DATA_PULSING_EN) + +/* OTG interrupt status bit masks */ +#define OTGSC_INTERRUPT_STATUS_BITS_MASK \ + (OTGSC_INTSTS_USB_ID | \ + OTGSC_INTR_1MS_TIMER_EN | \ + OTGSC_INTSTS_A_VBUS_VALID | \ + OTGSC_INTSTS_A_SESSION_VALID | \ + OTGSC_INTSTS_B_SESSION_VALID | \ + OTGSC_INTSTS_B_SESSION_END | \ + OTGSC_INTSTS_DATA_PULSING) + +/* + * A-DEVICE timing constants + */ + +/* Wait for VBUS Rise */ +#define TA_WAIT_VRISE (100) /* a_wait_vrise 100 ms, section: 6.6.5.1 */ + +/* Wait for B-Connect */ +#define TA_WAIT_BCON (10000) /* a_wait_bcon > 1 sec, section: 6.6.5.2 + * This is only used to get out of + * OTG_STATE_A_WAIT_BCON state if there was + * no connection for these many milliseconds + */ + +/* A-Idle to B-Disconnect */ +/* It is necessary for this timer to be more than 750 ms because of a bug in OPT + * test 5.4 in which B OPT disconnects after 750 ms instead of 75ms as stated + * in the test description + */ +#define TA_AIDL_BDIS (5000) /* a_suspend minimum 200 ms, section: 6.6.5.3 */ + +/* B-Idle to A-Disconnect */ +#define TA_BIDL_ADIS (12) /* 3 to 200 ms */ + +/* B-device timing constants */ + + +/* Data-Line Pulse Time*/ +#define TB_DATA_PLS (10) /* b_srp_init,continue 5~10ms, section:5.3.3 */ +#define TB_DATA_PLS_MIN (5) /* minimum 5 ms */ +#define TB_DATA_PLS_MAX (10) /* maximum 10 ms */ + +/* SRP Initiate Time */ +#define TB_SRP_INIT (100) /* b_srp_init,maximum 100 ms, section:5.3.8 */ + +/* SRP Fail Time */ +#define TB_SRP_FAIL (7000) /* b_srp_init,Fail time 5~30s, section:6.8.2.2*/ + +/* SRP result wait time */ +#define TB_SRP_WAIT (60) + +/* VBus time */ +#define TB_VBUS_PLS (30) /* time to keep vbus pulsing asserted */ + +/* Discharge time */ +/* This time should be less than 10ms. It varies from system to system. */ +#define TB_VBUS_DSCHRG (8) + +/* A-SE0 to B-Reset */ +#define TB_ASE0_BRST (20) /* b_wait_acon, mini 3.125 ms,section:6.8.2.4 */ + +/* A bus suspend timer before we can switch to b_wait_aconn */ +#define TB_A_SUSPEND (7) +#define TB_BUS_RESUME (12) + +/* SE0 Time Before SRP */ +#define TB_SE0_SRP (2) /* b_idle,minimum 2 ms, section:5.3.2 */ + +#define SET_OTG_STATE(phy, newstate) ((phy)->otg->state = newstate) + +struct usb_dr_mmap { + /* Capability register */ + u8 res1[256]; + u16 caplength; /* Capability Register Length */ + u16 hciversion; /* Host Controller Interface Version */ + u32 hcsparams; /* Host Controller Structual Parameters */ + u32 hccparams; /* Host Controller Capability Parameters */ + u8 res2[20]; + u32 dciversion; /* Device Controller Interface Version */ + u32 dccparams; /* Device Controller Capability Parameters */ + u8 res3[24]; + /* Operation register */ + u32 usbcmd; /* USB Command Register */ + u32 usbsts; /* USB Status Register */ + u32 usbintr; /* USB Interrupt Enable Register */ + u32 frindex; /* Frame Index Register */ + u8 res4[4]; + u32 deviceaddr; /* Device Address */ + u32 endpointlistaddr; /* Endpoint List Address Register */ + u8 res5[4]; + u32 burstsize; /* Master Interface Data Burst Size Register */ + u32 txttfilltuning; /* Transmit FIFO Tuning Controls Register */ + u8 res6[8]; + u32 ulpiview; /* ULPI register access */ + u8 res7[12]; + u32 configflag; /* Configure Flag Register */ + u32 portsc; /* Port 1 Status and Control Register */ + u8 res8[28]; + u32 otgsc; /* On-The-Go Status and Control */ + u32 usbmode; /* USB Mode Register */ + u32 endptsetupstat; /* Endpoint Setup Status Register */ + u32 endpointprime; /* Endpoint Initialization Register */ + u32 endptflush; /* Endpoint Flush Register */ + u32 endptstatus; /* Endpoint Status Register */ + u32 endptcomplete; /* Endpoint Complete Register */ + u32 endptctrl[6]; /* Endpoint Control Registers */ + u8 res9[552]; + u32 snoop1; + u32 snoop2; + u32 age_cnt_thresh; /* Age Count Threshold Register */ + u32 pri_ctrl; /* Priority Control Register */ + u32 si_ctrl; /* System Interface Control Register */ + u8 res10[236]; + u32 control; /* General Purpose Control Register */ +}; + +struct fsl_otg_timer { + unsigned long expires; /* Number of count increase to timeout */ + unsigned long count; /* Tick counter */ + void (*function)(unsigned long); /* Timeout function */ + unsigned long data; /* Data passed to function */ + struct list_head list; +}; + +inline struct fsl_otg_timer *otg_timer_initializer +(void (*function)(unsigned long), unsigned long expires, unsigned long data) +{ + struct fsl_otg_timer *timer; + + timer = kmalloc(sizeof(struct fsl_otg_timer), GFP_KERNEL); + if (!timer) + return NULL; + timer->function = function; + timer->expires = expires; + timer->data = data; + return timer; +} + +struct fsl_otg { + struct usb_phy phy; + struct otg_fsm fsm; + struct usb_dr_mmap *dr_mem_map; + struct delayed_work otg_event; + + /* used for usb host */ + struct work_struct work_wq; + u8 host_working; + + int irq; +}; + +struct fsl_otg_config { + u8 otg_port; +}; + +#define FSL_OTG_NAME "fsl-usb2-otg" + +void fsl_otg_add_timer(struct otg_fsm *fsm, void *timer); +void fsl_otg_del_timer(struct otg_fsm *fsm, void *timer); +void fsl_otg_pulse_vbus(void); diff --git a/drivers/usb/phy/phy-generic.c b/drivers/usb/phy/phy-generic.c new file mode 100644 index 000000000..3dc5c04e7 --- /dev/null +++ b/drivers/usb/phy/phy-generic.c @@ -0,0 +1,373 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * NOP USB transceiver for all USB transceiver which are either built-in + * into USB IP or which are mostly autonomous. + * + * Copyright (C) 2009 Texas Instruments Inc + * Author: Ajay Kumar Gupta <ajay.gupta@ti.com> + * + * Current status: + * This provides a "nop" transceiver for PHYs which are + * autonomous such as isp1504, isp1707, etc. + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/dma-mapping.h> +#include <linux/usb/gadget.h> +#include <linux/usb/otg.h> +#include <linux/usb/usb_phy_generic.h> +#include <linux/slab.h> +#include <linux/clk.h> +#include <linux/regulator/consumer.h> +#include <linux/of.h> +#include <linux/gpio/consumer.h> +#include <linux/delay.h> + +#include "phy-generic.h" + +#define VBUS_IRQ_FLAGS \ + (IRQF_SHARED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | \ + IRQF_ONESHOT) + +struct platform_device *usb_phy_generic_register(void) +{ + return platform_device_register_simple("usb_phy_generic", + PLATFORM_DEVID_AUTO, NULL, 0); +} +EXPORT_SYMBOL_GPL(usb_phy_generic_register); + +void usb_phy_generic_unregister(struct platform_device *pdev) +{ + platform_device_unregister(pdev); +} +EXPORT_SYMBOL_GPL(usb_phy_generic_unregister); + +static int nop_set_suspend(struct usb_phy *x, int suspend) +{ + struct usb_phy_generic *nop = dev_get_drvdata(x->dev); + + if (!IS_ERR(nop->clk)) { + if (suspend) + clk_disable_unprepare(nop->clk); + else + clk_prepare_enable(nop->clk); + } + + return 0; +} + +static void nop_reset(struct usb_phy_generic *nop) +{ + if (!nop->gpiod_reset) + return; + + gpiod_set_value_cansleep(nop->gpiod_reset, 1); + usleep_range(10000, 20000); + gpiod_set_value_cansleep(nop->gpiod_reset, 0); +} + +/* interface to regulator framework */ +static void nop_set_vbus_draw(struct usb_phy_generic *nop, unsigned mA) +{ + struct regulator *vbus_draw = nop->vbus_draw; + int enabled; + int ret; + + if (!vbus_draw) + return; + + enabled = nop->vbus_draw_enabled; + if (mA) { + regulator_set_current_limit(vbus_draw, 0, 1000 * mA); + if (!enabled) { + ret = regulator_enable(vbus_draw); + if (ret < 0) + return; + nop->vbus_draw_enabled = 1; + } + } else { + if (enabled) { + ret = regulator_disable(vbus_draw); + if (ret < 0) + return; + nop->vbus_draw_enabled = 0; + } + } + nop->mA = mA; +} + + +static irqreturn_t nop_gpio_vbus_thread(int irq, void *data) +{ + struct usb_phy_generic *nop = data; + struct usb_otg *otg = nop->phy.otg; + int vbus, status; + + vbus = gpiod_get_value(nop->gpiod_vbus); + if ((vbus ^ nop->vbus) == 0) + return IRQ_HANDLED; + nop->vbus = vbus; + + if (vbus) { + status = USB_EVENT_VBUS; + otg->state = OTG_STATE_B_PERIPHERAL; + nop->phy.last_event = status; + + /* drawing a "unit load" is *always* OK, except for OTG */ + nop_set_vbus_draw(nop, 100); + + atomic_notifier_call_chain(&nop->phy.notifier, status, + otg->gadget); + } else { + nop_set_vbus_draw(nop, 0); + + status = USB_EVENT_NONE; + otg->state = OTG_STATE_B_IDLE; + nop->phy.last_event = status; + + atomic_notifier_call_chain(&nop->phy.notifier, status, + otg->gadget); + } + return IRQ_HANDLED; +} + +int usb_gen_phy_init(struct usb_phy *phy) +{ + struct usb_phy_generic *nop = dev_get_drvdata(phy->dev); + int ret; + + if (!IS_ERR(nop->vcc)) { + if (regulator_enable(nop->vcc)) + dev_err(phy->dev, "Failed to enable power\n"); + } + + if (!IS_ERR(nop->clk)) { + ret = clk_prepare_enable(nop->clk); + if (ret) + return ret; + } + + nop_reset(nop); + + return 0; +} +EXPORT_SYMBOL_GPL(usb_gen_phy_init); + +void usb_gen_phy_shutdown(struct usb_phy *phy) +{ + struct usb_phy_generic *nop = dev_get_drvdata(phy->dev); + + gpiod_set_value_cansleep(nop->gpiod_reset, 1); + + if (!IS_ERR(nop->clk)) + clk_disable_unprepare(nop->clk); + + if (!IS_ERR(nop->vcc)) { + if (regulator_disable(nop->vcc)) + dev_err(phy->dev, "Failed to disable power\n"); + } +} +EXPORT_SYMBOL_GPL(usb_gen_phy_shutdown); + +static int nop_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget) +{ + if (!otg) + return -ENODEV; + + if (!gadget) { + otg->gadget = NULL; + return -ENODEV; + } + + otg->gadget = gadget; + if (otg->state == OTG_STATE_B_PERIPHERAL) + atomic_notifier_call_chain(&otg->usb_phy->notifier, + USB_EVENT_VBUS, otg->gadget); + else + otg->state = OTG_STATE_B_IDLE; + return 0; +} + +static int nop_set_host(struct usb_otg *otg, struct usb_bus *host) +{ + if (!otg) + return -ENODEV; + + if (!host) { + otg->host = NULL; + return -ENODEV; + } + + otg->host = host; + return 0; +} + +int usb_phy_gen_create_phy(struct device *dev, struct usb_phy_generic *nop) +{ + enum usb_phy_type type = USB_PHY_TYPE_USB2; + int err = 0; + + u32 clk_rate = 0; + bool needs_vcc = false, needs_clk = false; + + if (dev->of_node) { + struct device_node *node = dev->of_node; + + if (of_property_read_u32(node, "clock-frequency", &clk_rate)) + clk_rate = 0; + + needs_vcc = of_property_read_bool(node, "vcc-supply"); + needs_clk = of_property_read_bool(node, "clocks"); + } + nop->gpiod_reset = devm_gpiod_get_optional(dev, "reset", + GPIOD_ASIS); + err = PTR_ERR_OR_ZERO(nop->gpiod_reset); + if (!err) { + nop->gpiod_vbus = devm_gpiod_get_optional(dev, + "vbus-detect", + GPIOD_ASIS); + err = PTR_ERR_OR_ZERO(nop->gpiod_vbus); + } + + if (err) + return dev_err_probe(dev, err, + "Error requesting RESET or VBUS GPIO\n"); + if (nop->gpiod_reset) + gpiod_direction_output(nop->gpiod_reset, 1); + + nop->phy.otg = devm_kzalloc(dev, sizeof(*nop->phy.otg), + GFP_KERNEL); + if (!nop->phy.otg) + return -ENOMEM; + + nop->clk = devm_clk_get(dev, "main_clk"); + if (IS_ERR(nop->clk)) { + dev_dbg(dev, "Can't get phy clock: %ld\n", + PTR_ERR(nop->clk)); + if (needs_clk) + return PTR_ERR(nop->clk); + } + + if (!IS_ERR(nop->clk) && clk_rate) { + err = clk_set_rate(nop->clk, clk_rate); + if (err) { + dev_err(dev, "Error setting clock rate\n"); + return err; + } + } + + nop->vcc = devm_regulator_get(dev, "vcc"); + if (IS_ERR(nop->vcc)) { + dev_dbg(dev, "Error getting vcc regulator: %ld\n", + PTR_ERR(nop->vcc)); + if (needs_vcc) + return -EPROBE_DEFER; + } + + nop->vbus_draw = devm_regulator_get_exclusive(dev, "vbus"); + if (PTR_ERR(nop->vbus_draw) == -ENODEV) + nop->vbus_draw = NULL; + if (IS_ERR(nop->vbus_draw)) + return dev_err_probe(dev, PTR_ERR(nop->vbus_draw), + "could not get vbus regulator\n"); + + nop->dev = dev; + nop->phy.dev = nop->dev; + nop->phy.label = "nop-xceiv"; + nop->phy.set_suspend = nop_set_suspend; + nop->phy.type = type; + + nop->phy.otg->state = OTG_STATE_UNDEFINED; + nop->phy.otg->usb_phy = &nop->phy; + nop->phy.otg->set_host = nop_set_host; + nop->phy.otg->set_peripheral = nop_set_peripheral; + + return 0; +} +EXPORT_SYMBOL_GPL(usb_phy_gen_create_phy); + +static int usb_phy_generic_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct usb_phy_generic *nop; + int err; + + nop = devm_kzalloc(dev, sizeof(*nop), GFP_KERNEL); + if (!nop) + return -ENOMEM; + + err = usb_phy_gen_create_phy(dev, nop); + if (err) + return err; + if (nop->gpiod_vbus) { + err = devm_request_threaded_irq(&pdev->dev, + gpiod_to_irq(nop->gpiod_vbus), + NULL, nop_gpio_vbus_thread, + VBUS_IRQ_FLAGS, "vbus_detect", + nop); + if (err) { + dev_err(&pdev->dev, "can't request irq %i, err: %d\n", + gpiod_to_irq(nop->gpiod_vbus), err); + return err; + } + nop->phy.otg->state = gpiod_get_value(nop->gpiod_vbus) ? + OTG_STATE_B_PERIPHERAL : OTG_STATE_B_IDLE; + } + + nop->phy.init = usb_gen_phy_init; + nop->phy.shutdown = usb_gen_phy_shutdown; + + err = usb_add_phy_dev(&nop->phy); + if (err) { + dev_err(&pdev->dev, "can't register transceiver, err: %d\n", + err); + return err; + } + + platform_set_drvdata(pdev, nop); + + return 0; +} + +static int usb_phy_generic_remove(struct platform_device *pdev) +{ + struct usb_phy_generic *nop = platform_get_drvdata(pdev); + + usb_remove_phy(&nop->phy); + + return 0; +} + +static const struct of_device_id nop_xceiv_dt_ids[] = { + { .compatible = "usb-nop-xceiv" }, + { } +}; + +MODULE_DEVICE_TABLE(of, nop_xceiv_dt_ids); + +static struct platform_driver usb_phy_generic_driver = { + .probe = usb_phy_generic_probe, + .remove = usb_phy_generic_remove, + .driver = { + .name = "usb_phy_generic", + .of_match_table = nop_xceiv_dt_ids, + }, +}; + +static int __init usb_phy_generic_init(void) +{ + return platform_driver_register(&usb_phy_generic_driver); +} +subsys_initcall(usb_phy_generic_init); + +static void __exit usb_phy_generic_exit(void) +{ + platform_driver_unregister(&usb_phy_generic_driver); +} +module_exit(usb_phy_generic_exit); + +MODULE_ALIAS("platform:usb_phy_generic"); +MODULE_AUTHOR("Texas Instruments Inc"); +MODULE_DESCRIPTION("NOP USB Transceiver driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/usb/phy/phy-generic.h b/drivers/usb/phy/phy-generic.h new file mode 100644 index 000000000..7ee80211a --- /dev/null +++ b/drivers/usb/phy/phy-generic.h @@ -0,0 +1,27 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _PHY_GENERIC_H_ +#define _PHY_GENERIC_H_ + +#include <linux/usb/usb_phy_generic.h> +#include <linux/gpio/consumer.h> +#include <linux/regulator/consumer.h> + +struct usb_phy_generic { + struct usb_phy phy; + struct device *dev; + struct clk *clk; + struct regulator *vcc; + struct gpio_desc *gpiod_reset; + struct gpio_desc *gpiod_vbus; + struct regulator *vbus_draw; + bool vbus_draw_enabled; + unsigned long mA; + unsigned int vbus; +}; + +int usb_gen_phy_init(struct usb_phy *phy); +void usb_gen_phy_shutdown(struct usb_phy *phy); + +int usb_phy_gen_create_phy(struct device *dev, struct usb_phy_generic *nop); + +#endif diff --git a/drivers/usb/phy/phy-gpio-vbus-usb.c b/drivers/usb/phy/phy-gpio-vbus-usb.c new file mode 100644 index 000000000..f13f55307 --- /dev/null +++ b/drivers/usb/phy/phy-gpio-vbus-usb.c @@ -0,0 +1,384 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * gpio-vbus.c - simple GPIO VBUS sensing driver for B peripheral devices + * + * Copyright (c) 2008 Philipp Zabel <philipp.zabel@gmail.com> + */ + +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/usb.h> +#include <linux/workqueue.h> + +#include <linux/regulator/consumer.h> + +#include <linux/usb/gadget.h> +#include <linux/usb/otg.h> + + +/* + * A simple GPIO VBUS sensing driver for B peripheral only devices + * with internal transceivers. It can control a D+ pullup GPIO and + * a regulator to limit the current drawn from VBUS. + * + * Needs to be loaded before the UDC driver that will use it. + */ +struct gpio_vbus_data { + struct gpio_desc *vbus_gpiod; + struct gpio_desc *pullup_gpiod; + struct usb_phy phy; + struct device *dev; + struct regulator *vbus_draw; + int vbus_draw_enabled; + unsigned mA; + struct delayed_work work; + int vbus; + int irq; +}; + + +/* + * This driver relies on "both edges" triggering. VBUS has 100 msec to + * stabilize, so the peripheral controller driver may need to cope with + * some bouncing due to current surges (e.g. charging local capacitance) + * and contact chatter. + * + * REVISIT in desperate straits, toggling between rising and falling + * edges might be workable. + */ +#define VBUS_IRQ_FLAGS \ + (IRQF_SHARED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING) + + +/* interface to regulator framework */ +static void set_vbus_draw(struct gpio_vbus_data *gpio_vbus, unsigned mA) +{ + struct regulator *vbus_draw = gpio_vbus->vbus_draw; + int enabled; + int ret; + + if (!vbus_draw) + return; + + enabled = gpio_vbus->vbus_draw_enabled; + if (mA) { + regulator_set_current_limit(vbus_draw, 0, 1000 * mA); + if (!enabled) { + ret = regulator_enable(vbus_draw); + if (ret < 0) + return; + gpio_vbus->vbus_draw_enabled = 1; + } + } else { + if (enabled) { + ret = regulator_disable(vbus_draw); + if (ret < 0) + return; + gpio_vbus->vbus_draw_enabled = 0; + } + } + gpio_vbus->mA = mA; +} + +static int is_vbus_powered(struct gpio_vbus_data *gpio_vbus) +{ + return gpiod_get_value(gpio_vbus->vbus_gpiod); +} + +static void gpio_vbus_work(struct work_struct *work) +{ + struct gpio_vbus_data *gpio_vbus = + container_of(work, struct gpio_vbus_data, work.work); + int status, vbus; + + if (!gpio_vbus->phy.otg->gadget) + return; + + vbus = is_vbus_powered(gpio_vbus); + if ((vbus ^ gpio_vbus->vbus) == 0) + return; + gpio_vbus->vbus = vbus; + + /* Peripheral controllers which manage the pullup themselves won't have + * a pullup GPIO configured here. If it's configured here, we'll do + * what isp1301_omap::b_peripheral() does and enable the pullup here... + * although that may complicate usb_gadget_{,dis}connect() support. + */ + + if (vbus) { + status = USB_EVENT_VBUS; + gpio_vbus->phy.otg->state = OTG_STATE_B_PERIPHERAL; + gpio_vbus->phy.last_event = status; + usb_gadget_vbus_connect(gpio_vbus->phy.otg->gadget); + + /* drawing a "unit load" is *always* OK, except for OTG */ + set_vbus_draw(gpio_vbus, 100); + + /* optionally enable D+ pullup */ + if (gpio_vbus->pullup_gpiod) + gpiod_set_value(gpio_vbus->pullup_gpiod, 1); + + atomic_notifier_call_chain(&gpio_vbus->phy.notifier, + status, gpio_vbus->phy.otg->gadget); + usb_phy_set_event(&gpio_vbus->phy, USB_EVENT_ENUMERATED); + } else { + /* optionally disable D+ pullup */ + if (gpio_vbus->pullup_gpiod) + gpiod_set_value(gpio_vbus->pullup_gpiod, 0); + + set_vbus_draw(gpio_vbus, 0); + + usb_gadget_vbus_disconnect(gpio_vbus->phy.otg->gadget); + status = USB_EVENT_NONE; + gpio_vbus->phy.otg->state = OTG_STATE_B_IDLE; + gpio_vbus->phy.last_event = status; + + atomic_notifier_call_chain(&gpio_vbus->phy.notifier, + status, gpio_vbus->phy.otg->gadget); + usb_phy_set_event(&gpio_vbus->phy, USB_EVENT_NONE); + } +} + +/* VBUS change IRQ handler */ +static irqreturn_t gpio_vbus_irq(int irq, void *data) +{ + struct platform_device *pdev = data; + struct gpio_vbus_data *gpio_vbus = platform_get_drvdata(pdev); + struct usb_otg *otg = gpio_vbus->phy.otg; + + dev_dbg(&pdev->dev, "VBUS %s (gadget: %s)\n", + is_vbus_powered(gpio_vbus) ? "supplied" : "inactive", + otg->gadget ? otg->gadget->name : "none"); + + if (otg->gadget) + schedule_delayed_work(&gpio_vbus->work, msecs_to_jiffies(100)); + + return IRQ_HANDLED; +} + +/* OTG transceiver interface */ + +/* bind/unbind the peripheral controller */ +static int gpio_vbus_set_peripheral(struct usb_otg *otg, + struct usb_gadget *gadget) +{ + struct gpio_vbus_data *gpio_vbus; + struct platform_device *pdev; + + gpio_vbus = container_of(otg->usb_phy, struct gpio_vbus_data, phy); + pdev = to_platform_device(gpio_vbus->dev); + + if (!gadget) { + dev_dbg(&pdev->dev, "unregistering gadget '%s'\n", + otg->gadget->name); + + /* optionally disable D+ pullup */ + if (gpio_vbus->pullup_gpiod) + gpiod_set_value(gpio_vbus->pullup_gpiod, 0); + + set_vbus_draw(gpio_vbus, 0); + + usb_gadget_vbus_disconnect(otg->gadget); + otg->state = OTG_STATE_UNDEFINED; + + otg->gadget = NULL; + return 0; + } + + otg->gadget = gadget; + dev_dbg(&pdev->dev, "registered gadget '%s'\n", gadget->name); + + /* initialize connection state */ + gpio_vbus->vbus = 0; /* start with disconnected */ + gpio_vbus_irq(gpio_vbus->irq, pdev); + return 0; +} + +/* effective for B devices, ignored for A-peripheral */ +static int gpio_vbus_set_power(struct usb_phy *phy, unsigned mA) +{ + struct gpio_vbus_data *gpio_vbus; + + gpio_vbus = container_of(phy, struct gpio_vbus_data, phy); + + if (phy->otg->state == OTG_STATE_B_PERIPHERAL) + set_vbus_draw(gpio_vbus, mA); + return 0; +} + +/* for non-OTG B devices: set/clear transceiver suspend mode */ +static int gpio_vbus_set_suspend(struct usb_phy *phy, int suspend) +{ + struct gpio_vbus_data *gpio_vbus; + + gpio_vbus = container_of(phy, struct gpio_vbus_data, phy); + + /* draw max 0 mA from vbus in suspend mode; or the previously + * recorded amount of current if not suspended + * + * NOTE: high powered configs (mA > 100) may draw up to 2.5 mA + * if they're wake-enabled ... we don't handle that yet. + */ + return gpio_vbus_set_power(phy, suspend ? 0 : gpio_vbus->mA); +} + +/* platform driver interface */ + +static int gpio_vbus_probe(struct platform_device *pdev) +{ + struct gpio_vbus_data *gpio_vbus; + struct resource *res; + struct device *dev = &pdev->dev; + int err, irq; + unsigned long irqflags; + + gpio_vbus = devm_kzalloc(&pdev->dev, sizeof(struct gpio_vbus_data), + GFP_KERNEL); + if (!gpio_vbus) + return -ENOMEM; + + gpio_vbus->phy.otg = devm_kzalloc(&pdev->dev, sizeof(struct usb_otg), + GFP_KERNEL); + if (!gpio_vbus->phy.otg) + return -ENOMEM; + + platform_set_drvdata(pdev, gpio_vbus); + gpio_vbus->dev = &pdev->dev; + gpio_vbus->phy.label = "gpio-vbus"; + gpio_vbus->phy.dev = gpio_vbus->dev; + gpio_vbus->phy.set_power = gpio_vbus_set_power; + gpio_vbus->phy.set_suspend = gpio_vbus_set_suspend; + + gpio_vbus->phy.otg->state = OTG_STATE_UNDEFINED; + gpio_vbus->phy.otg->usb_phy = &gpio_vbus->phy; + gpio_vbus->phy.otg->set_peripheral = gpio_vbus_set_peripheral; + + /* Look up the VBUS sensing GPIO */ + gpio_vbus->vbus_gpiod = devm_gpiod_get(dev, "vbus", GPIOD_IN); + if (IS_ERR(gpio_vbus->vbus_gpiod)) { + err = PTR_ERR(gpio_vbus->vbus_gpiod); + dev_err(&pdev->dev, "can't request vbus gpio, err: %d\n", err); + return err; + } + gpiod_set_consumer_name(gpio_vbus->vbus_gpiod, "vbus_detect"); + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (res) { + irq = res->start; + irqflags = (res->flags & IRQF_TRIGGER_MASK) | IRQF_SHARED; + } else { + irq = gpiod_to_irq(gpio_vbus->vbus_gpiod); + irqflags = VBUS_IRQ_FLAGS; + } + + gpio_vbus->irq = irq; + + /* + * The VBUS sensing GPIO should have a pulldown, which will normally be + * part of a resistor ladder turning a 4.0V-5.25V level on VBUS into a + * value the GPIO detects as active. Some systems will use comparators. + * Get the optional D+ or D- pullup GPIO. If the data line pullup is + * in use, initialize it to "not pulling up" + */ + gpio_vbus->pullup_gpiod = devm_gpiod_get_optional(dev, "pullup", + GPIOD_OUT_LOW); + if (IS_ERR(gpio_vbus->pullup_gpiod)) { + err = PTR_ERR(gpio_vbus->pullup_gpiod); + dev_err(&pdev->dev, "can't request pullup gpio, err: %d\n", + err); + return err; + } + if (gpio_vbus->pullup_gpiod) + gpiod_set_consumer_name(gpio_vbus->pullup_gpiod, "udc_pullup"); + + err = devm_request_irq(&pdev->dev, irq, gpio_vbus_irq, irqflags, + "vbus_detect", pdev); + if (err) { + dev_err(&pdev->dev, "can't request irq %i, err: %d\n", + irq, err); + return err; + } + + INIT_DELAYED_WORK(&gpio_vbus->work, gpio_vbus_work); + + gpio_vbus->vbus_draw = devm_regulator_get(&pdev->dev, "vbus_draw"); + if (IS_ERR(gpio_vbus->vbus_draw)) { + dev_dbg(&pdev->dev, "can't get vbus_draw regulator, err: %ld\n", + PTR_ERR(gpio_vbus->vbus_draw)); + gpio_vbus->vbus_draw = NULL; + } + + /* only active when a gadget is registered */ + err = usb_add_phy(&gpio_vbus->phy, USB_PHY_TYPE_USB2); + if (err) { + dev_err(&pdev->dev, "can't register transceiver, err: %d\n", + err); + return err; + } + + /* TODO: wakeup could be enabled here with device_init_wakeup(dev, 1) */ + + return 0; +} + +static int gpio_vbus_remove(struct platform_device *pdev) +{ + struct gpio_vbus_data *gpio_vbus = platform_get_drvdata(pdev); + + device_init_wakeup(&pdev->dev, 0); + cancel_delayed_work_sync(&gpio_vbus->work); + + usb_remove_phy(&gpio_vbus->phy); + + return 0; +} + +#ifdef CONFIG_PM +static int gpio_vbus_pm_suspend(struct device *dev) +{ + struct gpio_vbus_data *gpio_vbus = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + enable_irq_wake(gpio_vbus->irq); + + return 0; +} + +static int gpio_vbus_pm_resume(struct device *dev) +{ + struct gpio_vbus_data *gpio_vbus = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + disable_irq_wake(gpio_vbus->irq); + + return 0; +} + +static const struct dev_pm_ops gpio_vbus_dev_pm_ops = { + .suspend = gpio_vbus_pm_suspend, + .resume = gpio_vbus_pm_resume, +}; +#endif + +MODULE_ALIAS("platform:gpio-vbus"); + +static struct platform_driver gpio_vbus_driver = { + .driver = { + .name = "gpio-vbus", +#ifdef CONFIG_PM + .pm = &gpio_vbus_dev_pm_ops, +#endif + }, + .probe = gpio_vbus_probe, + .remove = gpio_vbus_remove, +}; + +module_platform_driver(gpio_vbus_driver); + +MODULE_DESCRIPTION("simple GPIO controlled OTG transceiver driver"); +MODULE_AUTHOR("Philipp Zabel"); +MODULE_LICENSE("GPL"); diff --git a/drivers/usb/phy/phy-isp1301-omap.c b/drivers/usb/phy/phy-isp1301-omap.c new file mode 100644 index 000000000..e5d3f2060 --- /dev/null +++ b/drivers/usb/phy/phy-isp1301-omap.c @@ -0,0 +1,1639 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * isp1301_omap - ISP 1301 USB transceiver, talking to OMAP OTG controller + * + * Copyright (C) 2004 Texas Instruments + * Copyright (C) 2004 David Brownell + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/gpio/consumer.h> +#include <linux/usb/ch9.h> +#include <linux/usb/gadget.h> +#include <linux/usb.h> +#include <linux/usb/otg.h> +#include <linux/i2c.h> +#include <linux/workqueue.h> + +#include <asm/irq.h> +#include <asm/mach-types.h> + +#include <linux/soc/ti/omap1-mux.h> +#include <linux/soc/ti/omap1-usb.h> +#include <linux/soc/ti/omap1-io.h> + +#undef VERBOSE + + +#define DRIVER_VERSION "24 August 2004" +#define DRIVER_NAME (isp1301_driver.driver.name) + +MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver"); +MODULE_LICENSE("GPL"); + +struct isp1301 { + struct usb_phy phy; + struct i2c_client *client; + void (*i2c_release)(struct device *dev); + + int irq_type; + + u32 last_otg_ctrl; + unsigned working:1; + + struct timer_list timer; + + /* use keventd context to change the state for us */ + struct work_struct work; + + unsigned long todo; +# define WORK_UPDATE_ISP 0 /* update ISP from OTG */ +# define WORK_UPDATE_OTG 1 /* update OTG from ISP */ +# define WORK_HOST_RESUME 4 /* resume host */ +# define WORK_TIMER 6 /* timer fired */ +# define WORK_STOP 7 /* don't resubmit */ +}; + + +/* bits in OTG_CTRL */ + +#define OTG_XCEIV_OUTPUTS \ + (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID) +#define OTG_XCEIV_INPUTS \ + (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID) +#define OTG_CTRL_BITS \ + (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP) + /* and OTG_PULLUP is sometimes written */ + +#define OTG_CTRL_MASK (OTG_DRIVER_SEL| \ + OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \ + OTG_CTRL_BITS) + + +/*-------------------------------------------------------------------------*/ + +/* board-specific PM hooks */ + +#if defined(CONFIG_MACH_OMAP_H2) || defined(CONFIG_MACH_OMAP_H3) + +#if IS_REACHABLE(CONFIG_TPS65010) + +#include <linux/mfd/tps65010.h> + +#else + +static inline int tps65010_set_vbus_draw(unsigned mA) +{ + pr_debug("tps65010: draw %d mA (STUB)\n", mA); + return 0; +} + +#endif + +static void enable_vbus_draw(struct isp1301 *isp, unsigned mA) +{ + int status = tps65010_set_vbus_draw(mA); + if (status < 0) + pr_debug(" VBUS %d mA error %d\n", mA, status); +} + +#else + +static void enable_vbus_draw(struct isp1301 *isp, unsigned mA) +{ + /* H4 controls this by DIP switch S2.4; no soft control. + * ON means the charger is always enabled. Leave it OFF + * unless the OTG port is used only in B-peripheral mode. + */ +} + +#endif + +static void enable_vbus_source(struct isp1301 *isp) +{ + /* this board won't supply more than 8mA vbus power. + * some boards can switch a 100ma "unit load" (or more). + */ +} + + +/* products will deliver OTG messages with LEDs, GUI, etc */ +static inline void notresponding(struct isp1301 *isp) +{ + printk(KERN_NOTICE "OTG device not responding.\n"); +} + + +/*-------------------------------------------------------------------------*/ + +static struct i2c_driver isp1301_driver; + +/* smbus apis are used for portability */ + +static inline u8 +isp1301_get_u8(struct isp1301 *isp, u8 reg) +{ + return i2c_smbus_read_byte_data(isp->client, reg + 0); +} + +static inline int +isp1301_get_u16(struct isp1301 *isp, u8 reg) +{ + return i2c_smbus_read_word_data(isp->client, reg); +} + +static inline int +isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits) +{ + return i2c_smbus_write_byte_data(isp->client, reg + 0, bits); +} + +static inline int +isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits) +{ + return i2c_smbus_write_byte_data(isp->client, reg + 1, bits); +} + +/*-------------------------------------------------------------------------*/ + +/* identification */ +#define ISP1301_VENDOR_ID 0x00 /* u16 read */ +#define ISP1301_PRODUCT_ID 0x02 /* u16 read */ +#define ISP1301_BCD_DEVICE 0x14 /* u16 read */ + +#define I2C_VENDOR_ID_PHILIPS 0x04cc +#define I2C_PRODUCT_ID_PHILIPS_1301 0x1301 + +/* operational registers */ +#define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */ +# define MC1_SPEED (1 << 0) +# define MC1_SUSPEND (1 << 1) +# define MC1_DAT_SE0 (1 << 2) +# define MC1_TRANSPARENT (1 << 3) +# define MC1_BDIS_ACON_EN (1 << 4) +# define MC1_OE_INT_EN (1 << 5) +# define MC1_UART_EN (1 << 6) +# define MC1_MASK 0x7f +#define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */ +# define MC2_GLOBAL_PWR_DN (1 << 0) +# define MC2_SPD_SUSP_CTRL (1 << 1) +# define MC2_BI_DI (1 << 2) +# define MC2_TRANSP_BDIR0 (1 << 3) +# define MC2_TRANSP_BDIR1 (1 << 4) +# define MC2_AUDIO_EN (1 << 5) +# define MC2_PSW_EN (1 << 6) +# define MC2_EN2V7 (1 << 7) +#define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */ +# define OTG1_DP_PULLUP (1 << 0) +# define OTG1_DM_PULLUP (1 << 1) +# define OTG1_DP_PULLDOWN (1 << 2) +# define OTG1_DM_PULLDOWN (1 << 3) +# define OTG1_ID_PULLDOWN (1 << 4) +# define OTG1_VBUS_DRV (1 << 5) +# define OTG1_VBUS_DISCHRG (1 << 6) +# define OTG1_VBUS_CHRG (1 << 7) +#define ISP1301_OTG_STATUS 0x10 /* u8 readonly */ +# define OTG_B_SESS_END (1 << 6) +# define OTG_B_SESS_VLD (1 << 7) + +#define ISP1301_INTERRUPT_SOURCE 0x08 /* u8 read */ +#define ISP1301_INTERRUPT_LATCH 0x0A /* u8 read, set, +1 clear */ + +#define ISP1301_INTERRUPT_FALLING 0x0C /* u8 read, set, +1 clear */ +#define ISP1301_INTERRUPT_RISING 0x0E /* u8 read, set, +1 clear */ + +/* same bitfields in all interrupt registers */ +# define INTR_VBUS_VLD (1 << 0) +# define INTR_SESS_VLD (1 << 1) +# define INTR_DP_HI (1 << 2) +# define INTR_ID_GND (1 << 3) +# define INTR_DM_HI (1 << 4) +# define INTR_ID_FLOAT (1 << 5) +# define INTR_BDIS_ACON (1 << 6) +# define INTR_CR_INT (1 << 7) + +/*-------------------------------------------------------------------------*/ + +static inline const char *state_name(struct isp1301 *isp) +{ + return usb_otg_state_string(isp->phy.otg->state); +} + +/*-------------------------------------------------------------------------*/ + +/* NOTE: some of this ISP1301 setup is specific to H2 boards; + * not everything is guarded by board-specific checks, or even using + * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI. + * + * ALSO: this currently doesn't use ISP1301 low-power modes + * while OTG is running. + */ + +static void power_down(struct isp1301 *isp) +{ + isp->phy.otg->state = OTG_STATE_UNDEFINED; + + // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); + isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND); + + isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN); + isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); +} + +static void __maybe_unused power_up(struct isp1301 *isp) +{ + // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); + isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND); + + /* do this only when cpu is driving transceiver, + * so host won't see a low speed device... + */ + isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); +} + +#define NO_HOST_SUSPEND + +static int host_suspend(struct isp1301 *isp) +{ +#ifdef NO_HOST_SUSPEND + return 0; +#else + struct device *dev; + + if (!isp->phy.otg->host) + return -ENODEV; + + /* Currently ASSUMES only the OTG port matters; + * other ports could be active... + */ + dev = isp->phy.otg->host->controller; + return dev->driver->suspend(dev, 3, 0); +#endif +} + +static int host_resume(struct isp1301 *isp) +{ +#ifdef NO_HOST_SUSPEND + return 0; +#else + struct device *dev; + + if (!isp->phy.otg->host) + return -ENODEV; + + dev = isp->phy.otg->host->controller; + return dev->driver->resume(dev, 0); +#endif +} + +static int gadget_suspend(struct isp1301 *isp) +{ + isp->phy.otg->gadget->b_hnp_enable = 0; + isp->phy.otg->gadget->a_hnp_support = 0; + isp->phy.otg->gadget->a_alt_hnp_support = 0; + return usb_gadget_vbus_disconnect(isp->phy.otg->gadget); +} + +/*-------------------------------------------------------------------------*/ + +#define TIMER_MINUTES 10 +#define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ) + +/* Almost all our I2C messaging comes from a work queue's task context. + * NOTE: guaranteeing certain response times might mean we shouldn't + * share keventd's work queue; a realtime task might be safest. + */ +static void isp1301_defer_work(struct isp1301 *isp, int work) +{ + int status; + + if (isp && !test_and_set_bit(work, &isp->todo)) { + (void) get_device(&isp->client->dev); + status = schedule_work(&isp->work); + if (!status && !isp->working) + dev_vdbg(&isp->client->dev, + "work item %d may be lost\n", work); + } +} + +/* called from irq handlers */ +static void a_idle(struct isp1301 *isp, const char *tag) +{ + u32 l; + + if (isp->phy.otg->state == OTG_STATE_A_IDLE) + return; + + isp->phy.otg->default_a = 1; + if (isp->phy.otg->host) { + isp->phy.otg->host->is_b_host = 0; + host_suspend(isp); + } + if (isp->phy.otg->gadget) { + isp->phy.otg->gadget->is_a_peripheral = 1; + gadget_suspend(isp); + } + isp->phy.otg->state = OTG_STATE_A_IDLE; + l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; + omap_writel(l, OTG_CTRL); + isp->last_otg_ctrl = l; + pr_debug(" --> %s/%s\n", state_name(isp), tag); +} + +/* called from irq handlers */ +static void b_idle(struct isp1301 *isp, const char *tag) +{ + u32 l; + + if (isp->phy.otg->state == OTG_STATE_B_IDLE) + return; + + isp->phy.otg->default_a = 0; + if (isp->phy.otg->host) { + isp->phy.otg->host->is_b_host = 1; + host_suspend(isp); + } + if (isp->phy.otg->gadget) { + isp->phy.otg->gadget->is_a_peripheral = 0; + gadget_suspend(isp); + } + isp->phy.otg->state = OTG_STATE_B_IDLE; + l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; + omap_writel(l, OTG_CTRL); + isp->last_otg_ctrl = l; + pr_debug(" --> %s/%s\n", state_name(isp), tag); +} + +static void +dump_regs(struct isp1301 *isp, const char *label) +{ + u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1); + u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS); + u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); + + pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n", + omap_readl(OTG_CTRL), label, state_name(isp), + ctrl, status, src); + /* mode control and irq enables don't change much */ +} + +/*-------------------------------------------------------------------------*/ + +#ifdef CONFIG_USB_OTG + +/* + * The OMAP OTG controller handles most of the OTG state transitions. + * + * We translate isp1301 outputs (mostly voltage comparator status) into + * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state + * flags into isp1301 inputs ... and infer state transitions. + */ + +#ifdef VERBOSE + +static void check_state(struct isp1301 *isp, const char *tag) +{ + enum usb_otg_state state = OTG_STATE_UNDEFINED; + u8 fsm = omap_readw(OTG_TEST) & 0x0ff; + unsigned extra = 0; + + switch (fsm) { + + /* default-b */ + case 0x0: + state = OTG_STATE_B_IDLE; + break; + case 0x3: + case 0x7: + extra = 1; + case 0x1: + state = OTG_STATE_B_PERIPHERAL; + break; + case 0x11: + state = OTG_STATE_B_SRP_INIT; + break; + + /* extra dual-role default-b states */ + case 0x12: + case 0x13: + case 0x16: + extra = 1; + case 0x17: + state = OTG_STATE_B_WAIT_ACON; + break; + case 0x34: + state = OTG_STATE_B_HOST; + break; + + /* default-a */ + case 0x36: + state = OTG_STATE_A_IDLE; + break; + case 0x3c: + state = OTG_STATE_A_WAIT_VFALL; + break; + case 0x7d: + state = OTG_STATE_A_VBUS_ERR; + break; + case 0x9e: + case 0x9f: + extra = 1; + case 0x89: + state = OTG_STATE_A_PERIPHERAL; + break; + case 0xb7: + state = OTG_STATE_A_WAIT_VRISE; + break; + case 0xb8: + state = OTG_STATE_A_WAIT_BCON; + break; + case 0xb9: + state = OTG_STATE_A_HOST; + break; + case 0xba: + state = OTG_STATE_A_SUSPEND; + break; + default: + break; + } + if (isp->phy.otg->state == state && !extra) + return; + pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag, + usb_otg_state_string(state), fsm, state_name(isp), + omap_readl(OTG_CTRL)); +} + +#else + +static inline void check_state(struct isp1301 *isp, const char *tag) { } + +#endif + +/* outputs from ISP1301_INTERRUPT_SOURCE */ +static void update_otg1(struct isp1301 *isp, u8 int_src) +{ + u32 otg_ctrl; + + otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; + otg_ctrl &= ~OTG_XCEIV_INPUTS; + otg_ctrl &= ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD); + + if (int_src & INTR_SESS_VLD) + otg_ctrl |= OTG_ASESSVLD; + else if (isp->phy.otg->state == OTG_STATE_A_WAIT_VFALL) { + a_idle(isp, "vfall"); + otg_ctrl &= ~OTG_CTRL_BITS; + } + if (int_src & INTR_VBUS_VLD) + otg_ctrl |= OTG_VBUSVLD; + if (int_src & INTR_ID_GND) { /* default-A */ + if (isp->phy.otg->state == OTG_STATE_B_IDLE + || isp->phy.otg->state + == OTG_STATE_UNDEFINED) { + a_idle(isp, "init"); + return; + } + } else { /* default-B */ + otg_ctrl |= OTG_ID; + if (isp->phy.otg->state == OTG_STATE_A_IDLE + || isp->phy.otg->state == OTG_STATE_UNDEFINED) { + b_idle(isp, "init"); + return; + } + } + omap_writel(otg_ctrl, OTG_CTRL); +} + +/* outputs from ISP1301_OTG_STATUS */ +static void update_otg2(struct isp1301 *isp, u8 otg_status) +{ + u32 otg_ctrl; + + otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; + otg_ctrl &= ~OTG_XCEIV_INPUTS; + otg_ctrl &= ~(OTG_BSESSVLD | OTG_BSESSEND); + if (otg_status & OTG_B_SESS_VLD) + otg_ctrl |= OTG_BSESSVLD; + else if (otg_status & OTG_B_SESS_END) + otg_ctrl |= OTG_BSESSEND; + omap_writel(otg_ctrl, OTG_CTRL); +} + +/* inputs going to ISP1301 */ +static void otg_update_isp(struct isp1301 *isp) +{ + u32 otg_ctrl, otg_change; + u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP; + + otg_ctrl = omap_readl(OTG_CTRL); + otg_change = otg_ctrl ^ isp->last_otg_ctrl; + isp->last_otg_ctrl = otg_ctrl; + otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS; + + switch (isp->phy.otg->state) { + case OTG_STATE_B_IDLE: + case OTG_STATE_B_PERIPHERAL: + case OTG_STATE_B_SRP_INIT: + if (!(otg_ctrl & OTG_PULLUP)) { + // if (otg_ctrl & OTG_B_HNPEN) { + if (isp->phy.otg->gadget->b_hnp_enable) { + isp->phy.otg->state = OTG_STATE_B_WAIT_ACON; + pr_debug(" --> b_wait_acon\n"); + } + goto pulldown; + } +pullup: + set |= OTG1_DP_PULLUP; + clr |= OTG1_DP_PULLDOWN; + break; + case OTG_STATE_A_SUSPEND: + case OTG_STATE_A_PERIPHERAL: + if (otg_ctrl & OTG_PULLUP) + goto pullup; + fallthrough; + // case OTG_STATE_B_WAIT_ACON: + default: +pulldown: + set |= OTG1_DP_PULLDOWN; + clr |= OTG1_DP_PULLUP; + break; + } + +# define toggle(OTG,ISP) do { \ + if (otg_ctrl & OTG) set |= ISP; \ + else clr |= ISP; \ + } while (0) + + if (!(isp->phy.otg->host)) + otg_ctrl &= ~OTG_DRV_VBUS; + + switch (isp->phy.otg->state) { + case OTG_STATE_A_SUSPEND: + if (otg_ctrl & OTG_DRV_VBUS) { + set |= OTG1_VBUS_DRV; + break; + } + /* HNP failed for some reason (A_AIDL_BDIS timeout) */ + notresponding(isp); + + fallthrough; + case OTG_STATE_A_VBUS_ERR: + isp->phy.otg->state = OTG_STATE_A_WAIT_VFALL; + pr_debug(" --> a_wait_vfall\n"); + fallthrough; + case OTG_STATE_A_WAIT_VFALL: + /* FIXME usbcore thinks port power is still on ... */ + clr |= OTG1_VBUS_DRV; + break; + case OTG_STATE_A_IDLE: + if (otg_ctrl & OTG_DRV_VBUS) { + isp->phy.otg->state = OTG_STATE_A_WAIT_VRISE; + pr_debug(" --> a_wait_vrise\n"); + } + fallthrough; + default: + toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV); + } + + toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG); + toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG); + +# undef toggle + + isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set); + isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr); + + /* HNP switch to host or peripheral; and SRP */ + if (otg_change & OTG_PULLUP) { + u32 l; + + switch (isp->phy.otg->state) { + case OTG_STATE_B_IDLE: + if (clr & OTG1_DP_PULLUP) + break; + isp->phy.otg->state = OTG_STATE_B_PERIPHERAL; + pr_debug(" --> b_peripheral\n"); + break; + case OTG_STATE_A_SUSPEND: + if (clr & OTG1_DP_PULLUP) + break; + isp->phy.otg->state = OTG_STATE_A_PERIPHERAL; + pr_debug(" --> a_peripheral\n"); + break; + default: + break; + } + l = omap_readl(OTG_CTRL); + l |= OTG_PULLUP; + omap_writel(l, OTG_CTRL); + } + + check_state(isp, __func__); + dump_regs(isp, "otg->isp1301"); +} + +static irqreturn_t omap_otg_irq(int irq, void *_isp) +{ + u16 otg_irq = omap_readw(OTG_IRQ_SRC); + u32 otg_ctrl; + int ret = IRQ_NONE; + struct isp1301 *isp = _isp; + struct usb_otg *otg = isp->phy.otg; + + /* update ISP1301 transceiver from OTG controller */ + if (otg_irq & OPRT_CHG) { + omap_writew(OPRT_CHG, OTG_IRQ_SRC); + isp1301_defer_work(isp, WORK_UPDATE_ISP); + ret = IRQ_HANDLED; + + /* SRP to become b_peripheral failed */ + } else if (otg_irq & B_SRP_TMROUT) { + pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL)); + notresponding(isp); + + /* gadget drivers that care should monitor all kinds of + * remote wakeup (SRP, normal) using their own timer + * to give "check cable and A-device" messages. + */ + if (isp->phy.otg->state == OTG_STATE_B_SRP_INIT) + b_idle(isp, "srp_timeout"); + + omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC); + ret = IRQ_HANDLED; + + /* HNP to become b_host failed */ + } else if (otg_irq & B_HNP_FAIL) { + pr_debug("otg: %s B_HNP_FAIL, %06x\n", + state_name(isp), omap_readl(OTG_CTRL)); + notresponding(isp); + + otg_ctrl = omap_readl(OTG_CTRL); + otg_ctrl |= OTG_BUSDROP; + otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; + omap_writel(otg_ctrl, OTG_CTRL); + + /* subset of b_peripheral()... */ + isp->phy.otg->state = OTG_STATE_B_PERIPHERAL; + pr_debug(" --> b_peripheral\n"); + + omap_writew(B_HNP_FAIL, OTG_IRQ_SRC); + ret = IRQ_HANDLED; + + /* detect SRP from B-device ... */ + } else if (otg_irq & A_SRP_DETECT) { + pr_debug("otg: %s SRP_DETECT, %06x\n", + state_name(isp), omap_readl(OTG_CTRL)); + + isp1301_defer_work(isp, WORK_UPDATE_OTG); + switch (isp->phy.otg->state) { + case OTG_STATE_A_IDLE: + if (!otg->host) + break; + isp1301_defer_work(isp, WORK_HOST_RESUME); + otg_ctrl = omap_readl(OTG_CTRL); + otg_ctrl |= OTG_A_BUSREQ; + otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) + & ~OTG_XCEIV_INPUTS + & OTG_CTRL_MASK; + omap_writel(otg_ctrl, OTG_CTRL); + break; + default: + break; + } + + omap_writew(A_SRP_DETECT, OTG_IRQ_SRC); + ret = IRQ_HANDLED; + + /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise) + * we don't track them separately + */ + } else if (otg_irq & A_REQ_TMROUT) { + otg_ctrl = omap_readl(OTG_CTRL); + pr_info("otg: BCON_TMOUT from %s, %06x\n", + state_name(isp), otg_ctrl); + notresponding(isp); + + otg_ctrl |= OTG_BUSDROP; + otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; + omap_writel(otg_ctrl, OTG_CTRL); + isp->phy.otg->state = OTG_STATE_A_WAIT_VFALL; + + omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC); + ret = IRQ_HANDLED; + + /* A-supplied voltage fell too low; overcurrent */ + } else if (otg_irq & A_VBUS_ERR) { + otg_ctrl = omap_readl(OTG_CTRL); + printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n", + state_name(isp), otg_irq, otg_ctrl); + + otg_ctrl |= OTG_BUSDROP; + otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; + omap_writel(otg_ctrl, OTG_CTRL); + isp->phy.otg->state = OTG_STATE_A_VBUS_ERR; + + omap_writew(A_VBUS_ERR, OTG_IRQ_SRC); + ret = IRQ_HANDLED; + + /* switch driver; the transceiver code activates it, + * ungating the udc clock or resuming OHCI. + */ + } else if (otg_irq & DRIVER_SWITCH) { + int kick = 0; + + otg_ctrl = omap_readl(OTG_CTRL); + printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n", + state_name(isp), + (otg_ctrl & OTG_DRIVER_SEL) + ? "gadget" : "host", + otg_ctrl); + isp1301_defer_work(isp, WORK_UPDATE_ISP); + + /* role is peripheral */ + if (otg_ctrl & OTG_DRIVER_SEL) { + switch (isp->phy.otg->state) { + case OTG_STATE_A_IDLE: + b_idle(isp, __func__); + break; + default: + break; + } + isp1301_defer_work(isp, WORK_UPDATE_ISP); + + /* role is host */ + } else { + if (!(otg_ctrl & OTG_ID)) { + otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; + omap_writel(otg_ctrl | OTG_A_BUSREQ, OTG_CTRL); + } + + if (otg->host) { + switch (isp->phy.otg->state) { + case OTG_STATE_B_WAIT_ACON: + isp->phy.otg->state = OTG_STATE_B_HOST; + pr_debug(" --> b_host\n"); + kick = 1; + break; + case OTG_STATE_A_WAIT_BCON: + isp->phy.otg->state = OTG_STATE_A_HOST; + pr_debug(" --> a_host\n"); + break; + case OTG_STATE_A_PERIPHERAL: + isp->phy.otg->state = OTG_STATE_A_WAIT_BCON; + pr_debug(" --> a_wait_bcon\n"); + break; + default: + break; + } + isp1301_defer_work(isp, WORK_HOST_RESUME); + } + } + + omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC); + ret = IRQ_HANDLED; + + if (kick) + usb_bus_start_enum(otg->host, otg->host->otg_port); + } + + check_state(isp, __func__); + return ret; +} + +static struct platform_device *otg_dev; + +static int isp1301_otg_init(struct isp1301 *isp) +{ + u32 l; + + if (!otg_dev) + return -ENODEV; + + dump_regs(isp, __func__); + /* some of these values are board-specific... */ + l = omap_readl(OTG_SYSCON_2); + l |= OTG_EN + /* for B-device: */ + | SRP_GPDATA /* 9msec Bdev D+ pulse */ + | SRP_GPDVBUS /* discharge after VBUS pulse */ + // | (3 << 24) /* 2msec VBUS pulse */ + /* for A-device: */ + | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */ + | SRP_DPW /* detect 167+ns SRP pulses */ + | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */ + ; + omap_writel(l, OTG_SYSCON_2); + + update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); + update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); + + check_state(isp, __func__); + pr_debug("otg: %s, %s %06x\n", + state_name(isp), __func__, omap_readl(OTG_CTRL)); + + omap_writew(DRIVER_SWITCH | OPRT_CHG + | B_SRP_TMROUT | B_HNP_FAIL + | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT, OTG_IRQ_EN); + + l = omap_readl(OTG_SYSCON_2); + l |= OTG_EN; + omap_writel(l, OTG_SYSCON_2); + + return 0; +} + +static int otg_probe(struct platform_device *dev) +{ + // struct omap_usb_config *config = dev->platform_data; + + otg_dev = dev; + return 0; +} + +static int otg_remove(struct platform_device *dev) +{ + otg_dev = NULL; + return 0; +} + +static struct platform_driver omap_otg_driver = { + .probe = otg_probe, + .remove = otg_remove, + .driver = { + .name = "omap_otg", + }, +}; + +static int otg_bind(struct isp1301 *isp) +{ + int status; + + if (otg_dev) + return -EBUSY; + + status = platform_driver_register(&omap_otg_driver); + if (status < 0) + return status; + + if (otg_dev) + status = request_irq(otg_dev->resource[1].start, omap_otg_irq, + 0, DRIVER_NAME, isp); + else + status = -ENODEV; + + if (status < 0) + platform_driver_unregister(&omap_otg_driver); + return status; +} + +static void otg_unbind(struct isp1301 *isp) +{ + if (!otg_dev) + return; + free_irq(otg_dev->resource[1].start, isp); +} + +#else + +/* OTG controller isn't clocked */ + +#endif /* CONFIG_USB_OTG */ + +/*-------------------------------------------------------------------------*/ + +static void b_peripheral(struct isp1301 *isp) +{ + u32 l; + + l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; + omap_writel(l, OTG_CTRL); + + usb_gadget_vbus_connect(isp->phy.otg->gadget); + +#ifdef CONFIG_USB_OTG + enable_vbus_draw(isp, 8); + otg_update_isp(isp); +#else + enable_vbus_draw(isp, 100); + /* UDC driver just set OTG_BSESSVLD */ + isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP); + isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN); + isp->phy.otg->state = OTG_STATE_B_PERIPHERAL; + pr_debug(" --> b_peripheral\n"); + dump_regs(isp, "2periph"); +#endif +} + +static void isp_update_otg(struct isp1301 *isp, u8 stat) +{ + struct usb_otg *otg = isp->phy.otg; + u8 isp_stat, isp_bstat; + enum usb_otg_state state = isp->phy.otg->state; + + if (stat & INTR_BDIS_ACON) + pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp)); + + /* start certain state transitions right away */ + isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); + if (isp_stat & INTR_ID_GND) { + if (otg->default_a) { + switch (state) { + case OTG_STATE_B_IDLE: + a_idle(isp, "idle"); + fallthrough; + case OTG_STATE_A_IDLE: + enable_vbus_source(isp); + fallthrough; + case OTG_STATE_A_WAIT_VRISE: + /* we skip over OTG_STATE_A_WAIT_BCON, since + * the HC will transition to A_HOST (or + * A_SUSPEND!) without our noticing except + * when HNP is used. + */ + if (isp_stat & INTR_VBUS_VLD) + isp->phy.otg->state = OTG_STATE_A_HOST; + break; + case OTG_STATE_A_WAIT_VFALL: + if (!(isp_stat & INTR_SESS_VLD)) + a_idle(isp, "vfell"); + break; + default: + if (!(isp_stat & INTR_VBUS_VLD)) + isp->phy.otg->state = OTG_STATE_A_VBUS_ERR; + break; + } + isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); + } else { + switch (state) { + case OTG_STATE_B_PERIPHERAL: + case OTG_STATE_B_HOST: + case OTG_STATE_B_WAIT_ACON: + usb_gadget_vbus_disconnect(otg->gadget); + break; + default: + break; + } + if (state != OTG_STATE_A_IDLE) + a_idle(isp, "id"); + if (otg->host && state == OTG_STATE_A_IDLE) + isp1301_defer_work(isp, WORK_HOST_RESUME); + isp_bstat = 0; + } + } else { + u32 l; + + /* if user unplugged mini-A end of cable, + * don't bypass A_WAIT_VFALL. + */ + if (otg->default_a) { + switch (state) { + default: + isp->phy.otg->state = OTG_STATE_A_WAIT_VFALL; + break; + case OTG_STATE_A_WAIT_VFALL: + state = OTG_STATE_A_IDLE; + /* hub_wq may take a while to notice and + * handle this disconnect, so don't go + * to B_IDLE quite yet. + */ + break; + case OTG_STATE_A_IDLE: + host_suspend(isp); + isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, + MC1_BDIS_ACON_EN); + isp->phy.otg->state = OTG_STATE_B_IDLE; + l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; + l &= ~OTG_CTRL_BITS; + omap_writel(l, OTG_CTRL); + break; + case OTG_STATE_B_IDLE: + break; + } + } + isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); + + switch (isp->phy.otg->state) { + case OTG_STATE_B_PERIPHERAL: + case OTG_STATE_B_WAIT_ACON: + case OTG_STATE_B_HOST: + if (likely(isp_bstat & OTG_B_SESS_VLD)) + break; + enable_vbus_draw(isp, 0); +#ifndef CONFIG_USB_OTG + /* UDC driver will clear OTG_BSESSVLD */ + isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, + OTG1_DP_PULLDOWN); + isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, + OTG1_DP_PULLUP); + dump_regs(isp, __func__); +#endif + fallthrough; + case OTG_STATE_B_SRP_INIT: + b_idle(isp, __func__); + l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; + omap_writel(l, OTG_CTRL); + fallthrough; + case OTG_STATE_B_IDLE: + if (otg->gadget && (isp_bstat & OTG_B_SESS_VLD)) { +#ifdef CONFIG_USB_OTG + update_otg1(isp, isp_stat); + update_otg2(isp, isp_bstat); +#endif + b_peripheral(isp); + } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD))) + isp_bstat |= OTG_B_SESS_END; + break; + case OTG_STATE_A_WAIT_VFALL: + break; + default: + pr_debug("otg: unsupported b-device %s\n", + state_name(isp)); + break; + } + } + + if (state != isp->phy.otg->state) + pr_debug(" isp, %s -> %s\n", + usb_otg_state_string(state), state_name(isp)); + +#ifdef CONFIG_USB_OTG + /* update the OTG controller state to match the isp1301; may + * trigger OPRT_CHG irqs for changes going to the isp1301. + */ + update_otg1(isp, isp_stat); + update_otg2(isp, isp_bstat); + check_state(isp, __func__); +#endif + + dump_regs(isp, "isp1301->otg"); +} + +/*-------------------------------------------------------------------------*/ + +static u8 isp1301_clear_latch(struct isp1301 *isp) +{ + u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH); + isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch); + return latch; +} + +static void +isp1301_work(struct work_struct *work) +{ + struct isp1301 *isp = container_of(work, struct isp1301, work); + int stop; + + /* implicit lock: we're the only task using this device */ + isp->working = 1; + do { + stop = test_bit(WORK_STOP, &isp->todo); + +#ifdef CONFIG_USB_OTG + /* transfer state from otg engine to isp1301 */ + if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) { + otg_update_isp(isp); + put_device(&isp->client->dev); + } +#endif + /* transfer state from isp1301 to otg engine */ + if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) { + u8 stat = isp1301_clear_latch(isp); + + isp_update_otg(isp, stat); + put_device(&isp->client->dev); + } + + if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) { + u32 otg_ctrl; + + /* + * skip A_WAIT_VRISE; hc transitions invisibly + * skip A_WAIT_BCON; same. + */ + switch (isp->phy.otg->state) { + case OTG_STATE_A_WAIT_BCON: + case OTG_STATE_A_WAIT_VRISE: + isp->phy.otg->state = OTG_STATE_A_HOST; + pr_debug(" --> a_host\n"); + otg_ctrl = omap_readl(OTG_CTRL); + otg_ctrl |= OTG_A_BUSREQ; + otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) + & OTG_CTRL_MASK; + omap_writel(otg_ctrl, OTG_CTRL); + break; + case OTG_STATE_B_WAIT_ACON: + isp->phy.otg->state = OTG_STATE_B_HOST; + pr_debug(" --> b_host (acon)\n"); + break; + case OTG_STATE_B_HOST: + case OTG_STATE_B_IDLE: + case OTG_STATE_A_IDLE: + break; + default: + pr_debug(" host resume in %s\n", + state_name(isp)); + } + host_resume(isp); + // mdelay(10); + put_device(&isp->client->dev); + } + + if (test_and_clear_bit(WORK_TIMER, &isp->todo)) { +#ifdef VERBOSE + dump_regs(isp, "timer"); + if (!stop) + mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); +#endif + put_device(&isp->client->dev); + } + + if (isp->todo) + dev_vdbg(&isp->client->dev, + "work done, todo = 0x%lx\n", + isp->todo); + if (stop) { + dev_dbg(&isp->client->dev, "stop\n"); + break; + } + } while (isp->todo); + isp->working = 0; +} + +static irqreturn_t isp1301_irq(int irq, void *isp) +{ + isp1301_defer_work(isp, WORK_UPDATE_OTG); + return IRQ_HANDLED; +} + +static void isp1301_timer(struct timer_list *t) +{ + struct isp1301 *isp = from_timer(isp, t, timer); + + isp1301_defer_work(isp, WORK_TIMER); +} + +/*-------------------------------------------------------------------------*/ + +static void isp1301_release(struct device *dev) +{ + struct isp1301 *isp; + + isp = dev_get_drvdata(dev); + + /* FIXME -- not with a "new style" driver, it doesn't!! */ + + /* ugly -- i2c hijacks our memory hook to wait_for_completion() */ + if (isp->i2c_release) + isp->i2c_release(dev); + kfree(isp->phy.otg); + kfree (isp); +} + +static struct isp1301 *the_transceiver; + +static void isp1301_remove(struct i2c_client *i2c) +{ + struct isp1301 *isp; + + isp = i2c_get_clientdata(i2c); + + isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); + isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); + free_irq(i2c->irq, isp); +#ifdef CONFIG_USB_OTG + otg_unbind(isp); +#endif + set_bit(WORK_STOP, &isp->todo); + del_timer_sync(&isp->timer); + flush_work(&isp->work); + + put_device(&i2c->dev); + the_transceiver = NULL; +} + +/*-------------------------------------------------------------------------*/ + +/* NOTE: three modes are possible here, only one of which + * will be standards-conformant on any given system: + * + * - OTG mode (dual-role), required if there's a Mini-AB connector + * - HOST mode, for when there's one or more A (host) connectors + * - DEVICE mode, for when there's a B/Mini-B (device) connector + * + * As a rule, you won't have an isp1301 chip unless it's there to + * support the OTG mode. Other modes help testing USB controllers + * in isolation from (full) OTG support, or maybe so later board + * revisions can help to support those feature. + */ + +#ifdef CONFIG_USB_OTG + +static int isp1301_otg_enable(struct isp1301 *isp) +{ + power_up(isp); + isp1301_otg_init(isp); + + /* NOTE: since we don't change this, this provides + * a few more interrupts than are strictly needed. + */ + isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, + INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); + isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, + INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); + + dev_info(&isp->client->dev, "ready for dual-role USB ...\n"); + + return 0; +} + +#endif + +/* add or disable the host device+driver */ +static int +isp1301_set_host(struct usb_otg *otg, struct usb_bus *host) +{ + struct isp1301 *isp = container_of(otg->usb_phy, struct isp1301, phy); + + if (isp != the_transceiver) + return -ENODEV; + + if (!host) { + omap_writew(0, OTG_IRQ_EN); + power_down(isp); + otg->host = NULL; + return 0; + } + +#ifdef CONFIG_USB_OTG + otg->host = host; + dev_dbg(&isp->client->dev, "registered host\n"); + host_suspend(isp); + if (otg->gadget) + return isp1301_otg_enable(isp); + return 0; + +#elif !IS_ENABLED(CONFIG_USB_OMAP) + // FIXME update its refcount + otg->host = host; + + power_up(isp); + + if (machine_is_omap_h2()) + isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); + + dev_info(&isp->client->dev, "A-Host sessions ok\n"); + isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, + INTR_ID_GND); + isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, + INTR_ID_GND); + + /* If this has a Mini-AB connector, this mode is highly + * nonstandard ... but can be handy for testing, especially with + * the Mini-A end of an OTG cable. (Or something nonstandard + * like MiniB-to-StandardB, maybe built with a gender mender.) + */ + isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV); + + dump_regs(isp, __func__); + + return 0; + +#else + dev_dbg(&isp->client->dev, "host sessions not allowed\n"); + return -EINVAL; +#endif + +} + +static int +isp1301_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget) +{ + struct isp1301 *isp = container_of(otg->usb_phy, struct isp1301, phy); + + if (isp != the_transceiver) + return -ENODEV; + + if (!gadget) { + omap_writew(0, OTG_IRQ_EN); + if (!otg->default_a) + enable_vbus_draw(isp, 0); + usb_gadget_vbus_disconnect(otg->gadget); + otg->gadget = NULL; + power_down(isp); + return 0; + } + +#ifdef CONFIG_USB_OTG + otg->gadget = gadget; + dev_dbg(&isp->client->dev, "registered gadget\n"); + /* gadget driver may be suspended until vbus_connect () */ + if (otg->host) + return isp1301_otg_enable(isp); + return 0; + +#elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE) + otg->gadget = gadget; + // FIXME update its refcount + + { + u32 l; + + l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; + l &= ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS); + l |= OTG_ID; + omap_writel(l, OTG_CTRL); + } + + power_up(isp); + isp->phy.otg->state = OTG_STATE_B_IDLE; + + if (machine_is_omap_h2() || machine_is_omap_h3()) + isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); + + isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, + INTR_SESS_VLD); + isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, + INTR_VBUS_VLD); + dev_info(&isp->client->dev, "B-Peripheral sessions ok\n"); + dump_regs(isp, __func__); + + /* If this has a Mini-AB connector, this mode is highly + * nonstandard ... but can be handy for testing, so long + * as you don't plug a Mini-A cable into the jack. + */ + if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD) + b_peripheral(isp); + + return 0; + +#else + dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n"); + return -EINVAL; +#endif +} + + +/*-------------------------------------------------------------------------*/ + +static int +isp1301_set_power(struct usb_phy *dev, unsigned mA) +{ + if (!the_transceiver) + return -ENODEV; + if (dev->otg->state == OTG_STATE_B_PERIPHERAL) + enable_vbus_draw(the_transceiver, mA); + return 0; +} + +static int +isp1301_start_srp(struct usb_otg *otg) +{ + struct isp1301 *isp = container_of(otg->usb_phy, struct isp1301, phy); + u32 otg_ctrl; + + if (isp != the_transceiver || isp->phy.otg->state != OTG_STATE_B_IDLE) + return -ENODEV; + + otg_ctrl = omap_readl(OTG_CTRL); + if (!(otg_ctrl & OTG_BSESSEND)) + return -EINVAL; + + otg_ctrl |= OTG_B_BUSREQ; + otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK; + omap_writel(otg_ctrl, OTG_CTRL); + isp->phy.otg->state = OTG_STATE_B_SRP_INIT; + + pr_debug("otg: SRP, %s ... %06x\n", state_name(isp), + omap_readl(OTG_CTRL)); +#ifdef CONFIG_USB_OTG + check_state(isp, __func__); +#endif + return 0; +} + +static int +isp1301_start_hnp(struct usb_otg *otg) +{ +#ifdef CONFIG_USB_OTG + struct isp1301 *isp = container_of(otg->usb_phy, struct isp1301, phy); + u32 l; + + if (isp != the_transceiver) + return -ENODEV; + if (otg->default_a && (otg->host == NULL || !otg->host->b_hnp_enable)) + return -ENOTCONN; + if (!otg->default_a && (otg->gadget == NULL + || !otg->gadget->b_hnp_enable)) + return -ENOTCONN; + + /* We want hardware to manage most HNP protocol timings. + * So do this part as early as possible... + */ + switch (isp->phy.otg->state) { + case OTG_STATE_B_HOST: + isp->phy.otg->state = OTG_STATE_B_PERIPHERAL; + /* caller will suspend next */ + break; + case OTG_STATE_A_HOST: +#if 0 + /* autoconnect mode avoids irq latency bugs */ + isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, + MC1_BDIS_ACON_EN); +#endif + /* caller must suspend then clear A_BUSREQ */ + usb_gadget_vbus_connect(otg->gadget); + l = omap_readl(OTG_CTRL); + l |= OTG_A_SETB_HNPEN; + omap_writel(l, OTG_CTRL); + + break; + case OTG_STATE_A_PERIPHERAL: + /* initiated by B-Host suspend */ + break; + default: + return -EILSEQ; + } + pr_debug("otg: HNP %s, %06x ...\n", + state_name(isp), omap_readl(OTG_CTRL)); + check_state(isp, __func__); + return 0; +#else + /* srp-only */ + return -EINVAL; +#endif +} + +/*-------------------------------------------------------------------------*/ + +static int +isp1301_probe(struct i2c_client *i2c, const struct i2c_device_id *id) +{ + int status; + struct isp1301 *isp; + int irq; + + if (the_transceiver) + return 0; + + isp = kzalloc(sizeof *isp, GFP_KERNEL); + if (!isp) + return 0; + + isp->phy.otg = kzalloc(sizeof *isp->phy.otg, GFP_KERNEL); + if (!isp->phy.otg) { + kfree(isp); + return 0; + } + + INIT_WORK(&isp->work, isp1301_work); + timer_setup(&isp->timer, isp1301_timer, 0); + + i2c_set_clientdata(i2c, isp); + isp->client = i2c; + + /* verify the chip (shouldn't be necessary) */ + status = isp1301_get_u16(isp, ISP1301_VENDOR_ID); + if (status != I2C_VENDOR_ID_PHILIPS) { + dev_dbg(&i2c->dev, "not philips id: %d\n", status); + goto fail; + } + status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID); + if (status != I2C_PRODUCT_ID_PHILIPS_1301) { + dev_dbg(&i2c->dev, "not isp1301, %d\n", status); + goto fail; + } + isp->i2c_release = i2c->dev.release; + i2c->dev.release = isp1301_release; + + /* initial development used chiprev 2.00 */ + status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE); + dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n", + status >> 8, status & 0xff); + + /* make like power-on reset */ + isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK); + + isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI); + isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI); + + isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, + OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN); + isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, + ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN)); + + isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0); + isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); + isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); + +#ifdef CONFIG_USB_OTG + status = otg_bind(isp); + if (status < 0) { + dev_dbg(&i2c->dev, "can't bind OTG\n"); + goto fail; + } +#endif + + if (machine_is_omap_h2()) { + struct gpio_desc *gpiod; + + /* full speed signaling by default */ + isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, + MC1_SPEED); + isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, + MC2_SPD_SUSP_CTRL); + + gpiod = devm_gpiod_get(&i2c->dev, NULL, GPIOD_IN); + if (IS_ERR(gpiod)) { + dev_err(&i2c->dev, "cannot obtain H2 GPIO\n"); + goto fail; + } + gpiod_set_consumer_name(gpiod, "isp1301"); + irq = gpiod_to_irq(gpiod); + isp->irq_type = IRQF_TRIGGER_FALLING; + } else { + irq = i2c->irq; + } + + status = request_irq(irq, isp1301_irq, + isp->irq_type, DRIVER_NAME, isp); + if (status < 0) { + dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n", + i2c->irq, status); + goto fail; + } + + isp->phy.dev = &i2c->dev; + isp->phy.label = DRIVER_NAME; + isp->phy.set_power = isp1301_set_power; + + isp->phy.otg->usb_phy = &isp->phy; + isp->phy.otg->set_host = isp1301_set_host; + isp->phy.otg->set_peripheral = isp1301_set_peripheral; + isp->phy.otg->start_srp = isp1301_start_srp; + isp->phy.otg->start_hnp = isp1301_start_hnp; + + enable_vbus_draw(isp, 0); + power_down(isp); + the_transceiver = isp; + +#ifdef CONFIG_USB_OTG + update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); + update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); +#endif + + dump_regs(isp, __func__); + +#ifdef VERBOSE + mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); + dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES); +#endif + + status = usb_add_phy(&isp->phy, USB_PHY_TYPE_USB2); + if (status < 0) + dev_err(&i2c->dev, "can't register transceiver, %d\n", + status); + + return 0; + +fail: + kfree(isp->phy.otg); + kfree(isp); + return -ENODEV; +} + +static const struct i2c_device_id isp1301_id[] = { + { "isp1301_omap", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, isp1301_id); + +static struct i2c_driver isp1301_driver = { + .driver = { + .name = "isp1301_omap", + }, + .probe = isp1301_probe, + .remove = isp1301_remove, + .id_table = isp1301_id, +}; + +/*-------------------------------------------------------------------------*/ + +static int __init isp_init(void) +{ + return i2c_add_driver(&isp1301_driver); +} +subsys_initcall(isp_init); + +static void __exit isp_exit(void) +{ + if (the_transceiver) + usb_remove_phy(&the_transceiver->phy); + i2c_del_driver(&isp1301_driver); +} +module_exit(isp_exit); + diff --git a/drivers/usb/phy/phy-isp1301.c b/drivers/usb/phy/phy-isp1301.c new file mode 100644 index 000000000..c2777a5c1 --- /dev/null +++ b/drivers/usb/phy/phy-isp1301.c @@ -0,0 +1,159 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * NXP ISP1301 USB transceiver driver + * + * Copyright (C) 2012 Roland Stigge + * + * Author: Roland Stigge <stigge@antcom.de> + */ + +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/i2c.h> +#include <linux/usb/phy.h> +#include <linux/usb/isp1301.h> + +#define DRV_NAME "isp1301" + +struct isp1301 { + struct usb_phy phy; + struct mutex mutex; + + struct i2c_client *client; +}; + +#define phy_to_isp(p) (container_of((p), struct isp1301, phy)) + +static const struct i2c_device_id isp1301_id[] = { + { "isp1301", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, isp1301_id); + +static const struct of_device_id isp1301_of_match[] = { + {.compatible = "nxp,isp1301" }, + { }, +}; +MODULE_DEVICE_TABLE(of, isp1301_of_match); + +static struct i2c_client *isp1301_i2c_client; + +static int __isp1301_write(struct isp1301 *isp, u8 reg, u8 value, u8 clear) +{ + return i2c_smbus_write_byte_data(isp->client, reg | clear, value); +} + +static int isp1301_write(struct isp1301 *isp, u8 reg, u8 value) +{ + return __isp1301_write(isp, reg, value, 0); +} + +static int isp1301_clear(struct isp1301 *isp, u8 reg, u8 value) +{ + return __isp1301_write(isp, reg, value, ISP1301_I2C_REG_CLEAR_ADDR); +} + +static int isp1301_phy_init(struct usb_phy *phy) +{ + struct isp1301 *isp = phy_to_isp(phy); + + /* Disable transparent UART mode first */ + isp1301_clear(isp, ISP1301_I2C_MODE_CONTROL_1, MC1_UART_EN); + isp1301_clear(isp, ISP1301_I2C_MODE_CONTROL_1, ~MC1_SPEED_REG); + isp1301_write(isp, ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG); + isp1301_clear(isp, ISP1301_I2C_MODE_CONTROL_2, ~0); + isp1301_write(isp, ISP1301_I2C_MODE_CONTROL_2, (MC2_BI_DI | MC2_PSW_EN + | MC2_SPD_SUSP_CTRL)); + + isp1301_clear(isp, ISP1301_I2C_OTG_CONTROL_1, ~0); + isp1301_write(isp, ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0); + isp1301_write(isp, ISP1301_I2C_OTG_CONTROL_1, (OTG1_DM_PULLDOWN + | OTG1_DP_PULLDOWN)); + isp1301_clear(isp, ISP1301_I2C_OTG_CONTROL_1, (OTG1_DM_PULLUP + | OTG1_DP_PULLUP)); + + /* mask all interrupts */ + isp1301_clear(isp, ISP1301_I2C_INTERRUPT_LATCH, ~0); + isp1301_clear(isp, ISP1301_I2C_INTERRUPT_FALLING, ~0); + isp1301_clear(isp, ISP1301_I2C_INTERRUPT_RISING, ~0); + + return 0; +} + +static int isp1301_phy_set_vbus(struct usb_phy *phy, int on) +{ + struct isp1301 *isp = phy_to_isp(phy); + + if (on) + isp1301_write(isp, ISP1301_I2C_OTG_CONTROL_1, OTG1_VBUS_DRV); + else + isp1301_clear(isp, ISP1301_I2C_OTG_CONTROL_1, OTG1_VBUS_DRV); + + return 0; +} + +static int isp1301_probe(struct i2c_client *client, + const struct i2c_device_id *i2c_id) +{ + struct isp1301 *isp; + struct usb_phy *phy; + + isp = devm_kzalloc(&client->dev, sizeof(*isp), GFP_KERNEL); + if (!isp) + return -ENOMEM; + + isp->client = client; + mutex_init(&isp->mutex); + + phy = &isp->phy; + phy->dev = &client->dev; + phy->label = DRV_NAME; + phy->init = isp1301_phy_init; + phy->set_vbus = isp1301_phy_set_vbus; + phy->type = USB_PHY_TYPE_USB2; + + i2c_set_clientdata(client, isp); + usb_add_phy_dev(phy); + + isp1301_i2c_client = client; + + return 0; +} + +static void isp1301_remove(struct i2c_client *client) +{ + struct isp1301 *isp = i2c_get_clientdata(client); + + usb_remove_phy(&isp->phy); + isp1301_i2c_client = NULL; +} + +static struct i2c_driver isp1301_driver = { + .driver = { + .name = DRV_NAME, + .of_match_table = isp1301_of_match, + }, + .probe = isp1301_probe, + .remove = isp1301_remove, + .id_table = isp1301_id, +}; + +module_i2c_driver(isp1301_driver); + +struct i2c_client *isp1301_get_client(struct device_node *node) +{ + struct i2c_client *client; + + /* reference of ISP1301 I2C node via DT */ + client = of_find_i2c_device_by_node(node); + if (client) + return client; + + /* non-DT: only one ISP1301 chip supported */ + return isp1301_i2c_client; +} +EXPORT_SYMBOL_GPL(isp1301_get_client); + +MODULE_AUTHOR("Roland Stigge <stigge@antcom.de>"); +MODULE_DESCRIPTION("NXP ISP1301 USB transceiver driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/usb/phy/phy-jz4770.c b/drivers/usb/phy/phy-jz4770.c new file mode 100644 index 000000000..f16adcacd --- /dev/null +++ b/drivers/usb/phy/phy-jz4770.c @@ -0,0 +1,353 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Ingenic SoCs USB PHY driver + * Copyright (c) Paul Cercueil <paul@crapouillou.net> + * Copyright (c) 漆鹏振 (Qi Pengzhen) <aric.pzqi@ingenic.com> + * Copyright (c) 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com> + */ + +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regulator/consumer.h> +#include <linux/usb/otg.h> +#include <linux/usb/phy.h> + +/* OTGPHY register offsets */ +#define REG_USBPCR_OFFSET 0x00 +#define REG_USBRDT_OFFSET 0x04 +#define REG_USBVBFIL_OFFSET 0x08 +#define REG_USBPCR1_OFFSET 0x0c + +/* bits within the USBPCR register */ +#define USBPCR_USB_MODE BIT(31) +#define USBPCR_AVLD_REG BIT(30) +#define USBPCR_COMMONONN BIT(25) +#define USBPCR_VBUSVLDEXT BIT(24) +#define USBPCR_VBUSVLDEXTSEL BIT(23) +#define USBPCR_POR BIT(22) +#define USBPCR_SIDDQ BIT(21) +#define USBPCR_OTG_DISABLE BIT(20) +#define USBPCR_TXPREEMPHTUNE BIT(6) + +#define USBPCR_IDPULLUP_LSB 28 +#define USBPCR_IDPULLUP_MASK GENMASK(29, USBPCR_IDPULLUP_LSB) +#define USBPCR_IDPULLUP_ALWAYS (0x2 << USBPCR_IDPULLUP_LSB) +#define USBPCR_IDPULLUP_SUSPEND (0x1 << USBPCR_IDPULLUP_LSB) +#define USBPCR_IDPULLUP_OTG (0x0 << USBPCR_IDPULLUP_LSB) + +#define USBPCR_COMPDISTUNE_LSB 17 +#define USBPCR_COMPDISTUNE_MASK GENMASK(19, USBPCR_COMPDISTUNE_LSB) +#define USBPCR_COMPDISTUNE_DFT (0x4 << USBPCR_COMPDISTUNE_LSB) + +#define USBPCR_OTGTUNE_LSB 14 +#define USBPCR_OTGTUNE_MASK GENMASK(16, USBPCR_OTGTUNE_LSB) +#define USBPCR_OTGTUNE_DFT (0x4 << USBPCR_OTGTUNE_LSB) + +#define USBPCR_SQRXTUNE_LSB 11 +#define USBPCR_SQRXTUNE_MASK GENMASK(13, USBPCR_SQRXTUNE_LSB) +#define USBPCR_SQRXTUNE_DCR_20PCT (0x7 << USBPCR_SQRXTUNE_LSB) +#define USBPCR_SQRXTUNE_DFT (0x3 << USBPCR_SQRXTUNE_LSB) + +#define USBPCR_TXFSLSTUNE_LSB 7 +#define USBPCR_TXFSLSTUNE_MASK GENMASK(10, USBPCR_TXFSLSTUNE_LSB) +#define USBPCR_TXFSLSTUNE_DCR_50PPT (0xf << USBPCR_TXFSLSTUNE_LSB) +#define USBPCR_TXFSLSTUNE_DCR_25PPT (0x7 << USBPCR_TXFSLSTUNE_LSB) +#define USBPCR_TXFSLSTUNE_DFT (0x3 << USBPCR_TXFSLSTUNE_LSB) +#define USBPCR_TXFSLSTUNE_INC_25PPT (0x1 << USBPCR_TXFSLSTUNE_LSB) +#define USBPCR_TXFSLSTUNE_INC_50PPT (0x0 << USBPCR_TXFSLSTUNE_LSB) + +#define USBPCR_TXHSXVTUNE_LSB 4 +#define USBPCR_TXHSXVTUNE_MASK GENMASK(5, USBPCR_TXHSXVTUNE_LSB) +#define USBPCR_TXHSXVTUNE_DFT (0x3 << USBPCR_TXHSXVTUNE_LSB) +#define USBPCR_TXHSXVTUNE_DCR_15MV (0x1 << USBPCR_TXHSXVTUNE_LSB) + +#define USBPCR_TXRISETUNE_LSB 4 +#define USBPCR_TXRISETUNE_MASK GENMASK(5, USBPCR_TXRISETUNE_LSB) +#define USBPCR_TXRISETUNE_DFT (0x3 << USBPCR_TXRISETUNE_LSB) + +#define USBPCR_TXVREFTUNE_LSB 0 +#define USBPCR_TXVREFTUNE_MASK GENMASK(3, USBPCR_TXVREFTUNE_LSB) +#define USBPCR_TXVREFTUNE_INC_25PPT (0x7 << USBPCR_TXVREFTUNE_LSB) +#define USBPCR_TXVREFTUNE_DFT (0x5 << USBPCR_TXVREFTUNE_LSB) + +/* bits within the USBRDTR register */ +#define USBRDT_UTMI_RST BIT(27) +#define USBRDT_HB_MASK BIT(26) +#define USBRDT_VBFIL_LD_EN BIT(25) +#define USBRDT_IDDIG_EN BIT(24) +#define USBRDT_IDDIG_REG BIT(23) +#define USBRDT_VBFIL_EN BIT(2) + +/* bits within the USBPCR1 register */ +#define USBPCR1_BVLD_REG BIT(31) +#define USBPCR1_DPPD BIT(29) +#define USBPCR1_DMPD BIT(28) +#define USBPCR1_USB_SEL BIT(28) +#define USBPCR1_WORD_IF_16BIT BIT(19) + +enum ingenic_usb_phy_version { + ID_JZ4770, + ID_JZ4780, + ID_X1000, + ID_X1830, +}; + +struct ingenic_soc_info { + enum ingenic_usb_phy_version version; + + void (*usb_phy_init)(struct usb_phy *phy); +}; + +struct jz4770_phy { + const struct ingenic_soc_info *soc_info; + + struct usb_phy phy; + struct usb_otg otg; + struct device *dev; + void __iomem *base; + struct clk *clk; + struct regulator *vcc_supply; +}; + +static inline struct jz4770_phy *otg_to_jz4770_phy(struct usb_otg *otg) +{ + return container_of(otg, struct jz4770_phy, otg); +} + +static inline struct jz4770_phy *phy_to_jz4770_phy(struct usb_phy *phy) +{ + return container_of(phy, struct jz4770_phy, phy); +} + +static int ingenic_usb_phy_set_peripheral(struct usb_otg *otg, + struct usb_gadget *gadget) +{ + struct jz4770_phy *priv = otg_to_jz4770_phy(otg); + u32 reg; + + if (priv->soc_info->version >= ID_X1000) { + reg = readl(priv->base + REG_USBPCR1_OFFSET); + reg |= USBPCR1_BVLD_REG; + writel(reg, priv->base + REG_USBPCR1_OFFSET); + } + + reg = readl(priv->base + REG_USBPCR_OFFSET); + reg &= ~USBPCR_USB_MODE; + reg |= USBPCR_VBUSVLDEXT | USBPCR_VBUSVLDEXTSEL | USBPCR_OTG_DISABLE; + writel(reg, priv->base + REG_USBPCR_OFFSET); + + return 0; +} + +static int ingenic_usb_phy_set_host(struct usb_otg *otg, struct usb_bus *host) +{ + struct jz4770_phy *priv = otg_to_jz4770_phy(otg); + u32 reg; + + reg = readl(priv->base + REG_USBPCR_OFFSET); + reg &= ~(USBPCR_VBUSVLDEXT | USBPCR_VBUSVLDEXTSEL | USBPCR_OTG_DISABLE); + reg |= USBPCR_USB_MODE; + writel(reg, priv->base + REG_USBPCR_OFFSET); + + return 0; +} + +static int ingenic_usb_phy_init(struct usb_phy *phy) +{ + struct jz4770_phy *priv = phy_to_jz4770_phy(phy); + int err; + u32 reg; + + err = regulator_enable(priv->vcc_supply); + if (err) { + dev_err(priv->dev, "Unable to enable VCC: %d\n", err); + return err; + } + + err = clk_prepare_enable(priv->clk); + if (err) { + dev_err(priv->dev, "Unable to start clock: %d\n", err); + return err; + } + + priv->soc_info->usb_phy_init(phy); + + /* Wait for PHY to reset */ + usleep_range(30, 300); + reg = readl(priv->base + REG_USBPCR_OFFSET); + writel(reg & ~USBPCR_POR, priv->base + REG_USBPCR_OFFSET); + usleep_range(300, 1000); + + return 0; +} + +static void ingenic_usb_phy_shutdown(struct usb_phy *phy) +{ + struct jz4770_phy *priv = phy_to_jz4770_phy(phy); + + clk_disable_unprepare(priv->clk); + regulator_disable(priv->vcc_supply); +} + +static void ingenic_usb_phy_remove(void *phy) +{ + usb_remove_phy(phy); +} + +static void jz4770_usb_phy_init(struct usb_phy *phy) +{ + struct jz4770_phy *priv = phy_to_jz4770_phy(phy); + u32 reg; + + reg = USBPCR_AVLD_REG | USBPCR_COMMONONN | USBPCR_IDPULLUP_ALWAYS | + USBPCR_COMPDISTUNE_DFT | USBPCR_OTGTUNE_DFT | USBPCR_SQRXTUNE_DFT | + USBPCR_TXFSLSTUNE_DFT | USBPCR_TXRISETUNE_DFT | USBPCR_TXVREFTUNE_DFT | + USBPCR_POR; + writel(reg, priv->base + REG_USBPCR_OFFSET); +} + +static void jz4780_usb_phy_init(struct usb_phy *phy) +{ + struct jz4770_phy *priv = phy_to_jz4770_phy(phy); + u32 reg; + + reg = readl(priv->base + REG_USBPCR1_OFFSET) | USBPCR1_USB_SEL | + USBPCR1_WORD_IF_16BIT; + writel(reg, priv->base + REG_USBPCR1_OFFSET); + + reg = USBPCR_TXPREEMPHTUNE | USBPCR_COMMONONN | USBPCR_POR; + writel(reg, priv->base + REG_USBPCR_OFFSET); +} + +static void x1000_usb_phy_init(struct usb_phy *phy) +{ + struct jz4770_phy *priv = phy_to_jz4770_phy(phy); + u32 reg; + + reg = readl(priv->base + REG_USBPCR1_OFFSET) | USBPCR1_WORD_IF_16BIT; + writel(reg, priv->base + REG_USBPCR1_OFFSET); + + reg = USBPCR_SQRXTUNE_DCR_20PCT | USBPCR_TXPREEMPHTUNE | + USBPCR_TXHSXVTUNE_DCR_15MV | USBPCR_TXVREFTUNE_INC_25PPT | + USBPCR_COMMONONN | USBPCR_POR; + writel(reg, priv->base + REG_USBPCR_OFFSET); +} + +static void x1830_usb_phy_init(struct usb_phy *phy) +{ + struct jz4770_phy *priv = phy_to_jz4770_phy(phy); + u32 reg; + + /* rdt */ + writel(USBRDT_VBFIL_EN | USBRDT_UTMI_RST, priv->base + REG_USBRDT_OFFSET); + + reg = readl(priv->base + REG_USBPCR1_OFFSET) | USBPCR1_WORD_IF_16BIT | + USBPCR1_DMPD | USBPCR1_DPPD; + writel(reg, priv->base + REG_USBPCR1_OFFSET); + + reg = USBPCR_IDPULLUP_OTG | USBPCR_VBUSVLDEXT | USBPCR_TXPREEMPHTUNE | + USBPCR_COMMONONN | USBPCR_POR; + writel(reg, priv->base + REG_USBPCR_OFFSET); +} + +static const struct ingenic_soc_info jz4770_soc_info = { + .version = ID_JZ4770, + + .usb_phy_init = jz4770_usb_phy_init, +}; + +static const struct ingenic_soc_info jz4780_soc_info = { + .version = ID_JZ4780, + + .usb_phy_init = jz4780_usb_phy_init, +}; + +static const struct ingenic_soc_info x1000_soc_info = { + .version = ID_X1000, + + .usb_phy_init = x1000_usb_phy_init, +}; + +static const struct ingenic_soc_info x1830_soc_info = { + .version = ID_X1830, + + .usb_phy_init = x1830_usb_phy_init, +}; + +static const struct of_device_id ingenic_usb_phy_of_matches[] = { + { .compatible = "ingenic,jz4770-phy", .data = &jz4770_soc_info }, + { .compatible = "ingenic,jz4780-phy", .data = &jz4780_soc_info }, + { .compatible = "ingenic,x1000-phy", .data = &x1000_soc_info }, + { .compatible = "ingenic,x1830-phy", .data = &x1830_soc_info }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, ingenic_usb_phy_of_matches); + +static int jz4770_phy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct jz4770_phy *priv; + int err; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->soc_info = device_get_match_data(&pdev->dev); + if (!priv->soc_info) { + dev_err(&pdev->dev, "Error: No device match found\n"); + return -ENODEV; + } + + platform_set_drvdata(pdev, priv); + priv->dev = dev; + priv->phy.dev = dev; + priv->phy.otg = &priv->otg; + priv->phy.label = "ingenic-usb-phy"; + priv->phy.init = ingenic_usb_phy_init; + priv->phy.shutdown = ingenic_usb_phy_shutdown; + + priv->otg.state = OTG_STATE_UNDEFINED; + priv->otg.usb_phy = &priv->phy; + priv->otg.set_host = ingenic_usb_phy_set_host; + priv->otg.set_peripheral = ingenic_usb_phy_set_peripheral; + + priv->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(priv->base)) { + dev_err(dev, "Failed to map registers\n"); + return PTR_ERR(priv->base); + } + + priv->clk = devm_clk_get(dev, NULL); + if (IS_ERR(priv->clk)) + return dev_err_probe(dev, PTR_ERR(priv->clk), + "Failed to get clock\n"); + + priv->vcc_supply = devm_regulator_get(dev, "vcc"); + if (IS_ERR(priv->vcc_supply)) + return dev_err_probe(dev, PTR_ERR(priv->vcc_supply), + "Failed to get regulator\n"); + + err = usb_add_phy(&priv->phy, USB_PHY_TYPE_USB2); + if (err) + return dev_err_probe(dev, err, "Unable to register PHY\n"); + + return devm_add_action_or_reset(dev, ingenic_usb_phy_remove, &priv->phy); +} + +static struct platform_driver ingenic_phy_driver = { + .probe = jz4770_phy_probe, + .driver = { + .name = "jz4770-phy", + .of_match_table = ingenic_usb_phy_of_matches, + }, +}; +module_platform_driver(ingenic_phy_driver); + +MODULE_AUTHOR("周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>"); +MODULE_AUTHOR("漆鹏振 (Qi Pengzhen) <aric.pzqi@ingenic.com>"); +MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>"); +MODULE_DESCRIPTION("Ingenic SoCs USB PHY driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/usb/phy/phy-keystone.c b/drivers/usb/phy/phy-keystone.c new file mode 100644 index 000000000..f75912279 --- /dev/null +++ b/drivers/usb/phy/phy-keystone.c @@ -0,0 +1,120 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * phy-keystone - USB PHY, talking to dwc3 controller in Keystone. + * + * Copyright (C) 2013 Texas Instruments Incorporated - https://www.ti.com + * + * Author: WingMan Kwok <w-kwok2@ti.com> + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/usb/usb_phy_generic.h> +#include <linux/io.h> +#include <linux/of.h> + +#include "phy-generic.h" + +/* USB PHY control register offsets */ +#define USB_PHY_CTL_UTMI 0x0000 +#define USB_PHY_CTL_PIPE 0x0004 +#define USB_PHY_CTL_PARAM_1 0x0008 +#define USB_PHY_CTL_PARAM_2 0x000c +#define USB_PHY_CTL_CLOCK 0x0010 +#define USB_PHY_CTL_PLL 0x0014 + +#define PHY_REF_SSP_EN BIT(29) + +struct keystone_usbphy { + struct usb_phy_generic usb_phy_gen; + void __iomem *phy_ctrl; +}; + +static inline u32 keystone_usbphy_readl(void __iomem *base, u32 offset) +{ + return readl(base + offset); +} + +static inline void keystone_usbphy_writel(void __iomem *base, + u32 offset, u32 value) +{ + writel(value, base + offset); +} + +static int keystone_usbphy_init(struct usb_phy *phy) +{ + struct keystone_usbphy *k_phy = dev_get_drvdata(phy->dev); + u32 val; + + val = keystone_usbphy_readl(k_phy->phy_ctrl, USB_PHY_CTL_CLOCK); + keystone_usbphy_writel(k_phy->phy_ctrl, USB_PHY_CTL_CLOCK, + val | PHY_REF_SSP_EN); + return 0; +} + +static void keystone_usbphy_shutdown(struct usb_phy *phy) +{ + struct keystone_usbphy *k_phy = dev_get_drvdata(phy->dev); + u32 val; + + val = keystone_usbphy_readl(k_phy->phy_ctrl, USB_PHY_CTL_CLOCK); + keystone_usbphy_writel(k_phy->phy_ctrl, USB_PHY_CTL_CLOCK, + val & ~PHY_REF_SSP_EN); +} + +static int keystone_usbphy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct keystone_usbphy *k_phy; + int ret; + + k_phy = devm_kzalloc(dev, sizeof(*k_phy), GFP_KERNEL); + if (!k_phy) + return -ENOMEM; + + k_phy->phy_ctrl = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(k_phy->phy_ctrl)) + return PTR_ERR(k_phy->phy_ctrl); + + ret = usb_phy_gen_create_phy(dev, &k_phy->usb_phy_gen); + if (ret) + return ret; + + k_phy->usb_phy_gen.phy.init = keystone_usbphy_init; + k_phy->usb_phy_gen.phy.shutdown = keystone_usbphy_shutdown; + + platform_set_drvdata(pdev, k_phy); + + return usb_add_phy_dev(&k_phy->usb_phy_gen.phy); +} + +static int keystone_usbphy_remove(struct platform_device *pdev) +{ + struct keystone_usbphy *k_phy = platform_get_drvdata(pdev); + + usb_remove_phy(&k_phy->usb_phy_gen.phy); + + return 0; +} + +static const struct of_device_id keystone_usbphy_ids[] = { + { .compatible = "ti,keystone-usbphy" }, + { } +}; +MODULE_DEVICE_TABLE(of, keystone_usbphy_ids); + +static struct platform_driver keystone_usbphy_driver = { + .probe = keystone_usbphy_probe, + .remove = keystone_usbphy_remove, + .driver = { + .name = "keystone-usbphy", + .of_match_table = keystone_usbphy_ids, + }, +}; + +module_platform_driver(keystone_usbphy_driver); + +MODULE_ALIAS("platform:keystone-usbphy"); +MODULE_AUTHOR("Texas Instruments Inc."); +MODULE_DESCRIPTION("Keystone USB phy driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/usb/phy/phy-mv-usb.c b/drivers/usb/phy/phy-mv-usb.c new file mode 100644 index 000000000..86503b7d6 --- /dev/null +++ b/drivers/usb/phy/phy-mv-usb.c @@ -0,0 +1,882 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2011 Marvell International Ltd. All rights reserved. + * Author: Chao Xie <chao.xie@marvell.com> + * Neil Zhang <zhangwm@marvell.com> + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/io.h> +#include <linux/iopoll.h> +#include <linux/uaccess.h> +#include <linux/device.h> +#include <linux/proc_fs.h> +#include <linux/clk.h> +#include <linux/workqueue.h> +#include <linux/platform_device.h> + +#include <linux/usb.h> +#include <linux/usb/ch9.h> +#include <linux/usb/otg.h> +#include <linux/usb/gadget.h> +#include <linux/usb/hcd.h> +#include <linux/platform_data/mv_usb.h> + +#include "phy-mv-usb.h" + +#define DRIVER_DESC "Marvell USB OTG transceiver driver" + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); + +static const char driver_name[] = "mv-otg"; + +static char *state_string[] = { + "undefined", + "b_idle", + "b_srp_init", + "b_peripheral", + "b_wait_acon", + "b_host", + "a_idle", + "a_wait_vrise", + "a_wait_bcon", + "a_host", + "a_suspend", + "a_peripheral", + "a_wait_vfall", + "a_vbus_err" +}; + +static int mv_otg_set_vbus(struct usb_otg *otg, bool on) +{ + struct mv_otg *mvotg = container_of(otg->usb_phy, struct mv_otg, phy); + if (mvotg->pdata->set_vbus == NULL) + return -ENODEV; + + return mvotg->pdata->set_vbus(on); +} + +static int mv_otg_set_host(struct usb_otg *otg, + struct usb_bus *host) +{ + otg->host = host; + + return 0; +} + +static int mv_otg_set_peripheral(struct usb_otg *otg, + struct usb_gadget *gadget) +{ + otg->gadget = gadget; + + return 0; +} + +static void mv_otg_run_state_machine(struct mv_otg *mvotg, + unsigned long delay) +{ + dev_dbg(&mvotg->pdev->dev, "transceiver is updated\n"); + if (!mvotg->qwork) + return; + + queue_delayed_work(mvotg->qwork, &mvotg->work, delay); +} + +static void mv_otg_timer_await_bcon(struct timer_list *t) +{ + struct mv_otg *mvotg = from_timer(mvotg, t, + otg_ctrl.timer[A_WAIT_BCON_TIMER]); + + mvotg->otg_ctrl.a_wait_bcon_timeout = 1; + + dev_info(&mvotg->pdev->dev, "B Device No Response!\n"); + + if (spin_trylock(&mvotg->wq_lock)) { + mv_otg_run_state_machine(mvotg, 0); + spin_unlock(&mvotg->wq_lock); + } +} + +static int mv_otg_cancel_timer(struct mv_otg *mvotg, unsigned int id) +{ + struct timer_list *timer; + + if (id >= OTG_TIMER_NUM) + return -EINVAL; + + timer = &mvotg->otg_ctrl.timer[id]; + + if (timer_pending(timer)) + del_timer(timer); + + return 0; +} + +static int mv_otg_set_timer(struct mv_otg *mvotg, unsigned int id, + unsigned long interval) +{ + struct timer_list *timer; + + if (id >= OTG_TIMER_NUM) + return -EINVAL; + + timer = &mvotg->otg_ctrl.timer[id]; + if (timer_pending(timer)) { + dev_err(&mvotg->pdev->dev, "Timer%d is already running\n", id); + return -EBUSY; + } + + timer->expires = jiffies + interval; + add_timer(timer); + + return 0; +} + +static int mv_otg_reset(struct mv_otg *mvotg) +{ + u32 tmp; + int ret; + + /* Stop the controller */ + tmp = readl(&mvotg->op_regs->usbcmd); + tmp &= ~USBCMD_RUN_STOP; + writel(tmp, &mvotg->op_regs->usbcmd); + + /* Reset the controller to get default values */ + writel(USBCMD_CTRL_RESET, &mvotg->op_regs->usbcmd); + + ret = readl_poll_timeout_atomic(&mvotg->op_regs->usbcmd, tmp, + (tmp & USBCMD_CTRL_RESET), 10, 10000); + if (ret < 0) { + dev_err(&mvotg->pdev->dev, + "Wait for RESET completed TIMEOUT\n"); + return ret; + } + + writel(0x0, &mvotg->op_regs->usbintr); + tmp = readl(&mvotg->op_regs->usbsts); + writel(tmp, &mvotg->op_regs->usbsts); + + return 0; +} + +static void mv_otg_init_irq(struct mv_otg *mvotg) +{ + u32 otgsc; + + mvotg->irq_en = OTGSC_INTR_A_SESSION_VALID + | OTGSC_INTR_A_VBUS_VALID; + mvotg->irq_status = OTGSC_INTSTS_A_SESSION_VALID + | OTGSC_INTSTS_A_VBUS_VALID; + + if (mvotg->pdata->vbus == NULL) { + mvotg->irq_en |= OTGSC_INTR_B_SESSION_VALID + | OTGSC_INTR_B_SESSION_END; + mvotg->irq_status |= OTGSC_INTSTS_B_SESSION_VALID + | OTGSC_INTSTS_B_SESSION_END; + } + + if (mvotg->pdata->id == NULL) { + mvotg->irq_en |= OTGSC_INTR_USB_ID; + mvotg->irq_status |= OTGSC_INTSTS_USB_ID; + } + + otgsc = readl(&mvotg->op_regs->otgsc); + otgsc |= mvotg->irq_en; + writel(otgsc, &mvotg->op_regs->otgsc); +} + +static void mv_otg_start_host(struct mv_otg *mvotg, int on) +{ +#ifdef CONFIG_USB + struct usb_otg *otg = mvotg->phy.otg; + struct usb_hcd *hcd; + + if (!otg->host) + return; + + dev_info(&mvotg->pdev->dev, "%s host\n", on ? "start" : "stop"); + + hcd = bus_to_hcd(otg->host); + + if (on) { + usb_add_hcd(hcd, hcd->irq, IRQF_SHARED); + device_wakeup_enable(hcd->self.controller); + } else { + usb_remove_hcd(hcd); + } +#endif /* CONFIG_USB */ +} + +static void mv_otg_start_periphrals(struct mv_otg *mvotg, int on) +{ + struct usb_otg *otg = mvotg->phy.otg; + + if (!otg->gadget) + return; + + dev_info(mvotg->phy.dev, "gadget %s\n", on ? "on" : "off"); + + if (on) + usb_gadget_vbus_connect(otg->gadget); + else + usb_gadget_vbus_disconnect(otg->gadget); +} + +static void otg_clock_enable(struct mv_otg *mvotg) +{ + clk_prepare_enable(mvotg->clk); +} + +static void otg_clock_disable(struct mv_otg *mvotg) +{ + clk_disable_unprepare(mvotg->clk); +} + +static int mv_otg_enable_internal(struct mv_otg *mvotg) +{ + int retval = 0; + + if (mvotg->active) + return 0; + + dev_dbg(&mvotg->pdev->dev, "otg enabled\n"); + + otg_clock_enable(mvotg); + if (mvotg->pdata->phy_init) { + retval = mvotg->pdata->phy_init(mvotg->phy_regs); + if (retval) { + dev_err(&mvotg->pdev->dev, + "init phy error %d\n", retval); + otg_clock_disable(mvotg); + return retval; + } + } + mvotg->active = 1; + + return 0; + +} + +static int mv_otg_enable(struct mv_otg *mvotg) +{ + if (mvotg->clock_gating) + return mv_otg_enable_internal(mvotg); + + return 0; +} + +static void mv_otg_disable_internal(struct mv_otg *mvotg) +{ + if (mvotg->active) { + dev_dbg(&mvotg->pdev->dev, "otg disabled\n"); + if (mvotg->pdata->phy_deinit) + mvotg->pdata->phy_deinit(mvotg->phy_regs); + otg_clock_disable(mvotg); + mvotg->active = 0; + } +} + +static void mv_otg_disable(struct mv_otg *mvotg) +{ + if (mvotg->clock_gating) + mv_otg_disable_internal(mvotg); +} + +static void mv_otg_update_inputs(struct mv_otg *mvotg) +{ + struct mv_otg_ctrl *otg_ctrl = &mvotg->otg_ctrl; + u32 otgsc; + + otgsc = readl(&mvotg->op_regs->otgsc); + + if (mvotg->pdata->vbus) { + if (mvotg->pdata->vbus->poll() == VBUS_HIGH) { + otg_ctrl->b_sess_vld = 1; + otg_ctrl->b_sess_end = 0; + } else { + otg_ctrl->b_sess_vld = 0; + otg_ctrl->b_sess_end = 1; + } + } else { + otg_ctrl->b_sess_vld = !!(otgsc & OTGSC_STS_B_SESSION_VALID); + otg_ctrl->b_sess_end = !!(otgsc & OTGSC_STS_B_SESSION_END); + } + + if (mvotg->pdata->id) + otg_ctrl->id = !!mvotg->pdata->id->poll(); + else + otg_ctrl->id = !!(otgsc & OTGSC_STS_USB_ID); + + if (mvotg->pdata->otg_force_a_bus_req && !otg_ctrl->id) + otg_ctrl->a_bus_req = 1; + + otg_ctrl->a_sess_vld = !!(otgsc & OTGSC_STS_A_SESSION_VALID); + otg_ctrl->a_vbus_vld = !!(otgsc & OTGSC_STS_A_VBUS_VALID); + + dev_dbg(&mvotg->pdev->dev, "%s: ", __func__); + dev_dbg(&mvotg->pdev->dev, "id %d\n", otg_ctrl->id); + dev_dbg(&mvotg->pdev->dev, "b_sess_vld %d\n", otg_ctrl->b_sess_vld); + dev_dbg(&mvotg->pdev->dev, "b_sess_end %d\n", otg_ctrl->b_sess_end); + dev_dbg(&mvotg->pdev->dev, "a_vbus_vld %d\n", otg_ctrl->a_vbus_vld); + dev_dbg(&mvotg->pdev->dev, "a_sess_vld %d\n", otg_ctrl->a_sess_vld); +} + +static void mv_otg_update_state(struct mv_otg *mvotg) +{ + struct mv_otg_ctrl *otg_ctrl = &mvotg->otg_ctrl; + int old_state = mvotg->phy.otg->state; + + switch (old_state) { + case OTG_STATE_UNDEFINED: + mvotg->phy.otg->state = OTG_STATE_B_IDLE; + fallthrough; + case OTG_STATE_B_IDLE: + if (otg_ctrl->id == 0) + mvotg->phy.otg->state = OTG_STATE_A_IDLE; + else if (otg_ctrl->b_sess_vld) + mvotg->phy.otg->state = OTG_STATE_B_PERIPHERAL; + break; + case OTG_STATE_B_PERIPHERAL: + if (!otg_ctrl->b_sess_vld || otg_ctrl->id == 0) + mvotg->phy.otg->state = OTG_STATE_B_IDLE; + break; + case OTG_STATE_A_IDLE: + if (otg_ctrl->id) + mvotg->phy.otg->state = OTG_STATE_B_IDLE; + else if (!(otg_ctrl->a_bus_drop) && + (otg_ctrl->a_bus_req || otg_ctrl->a_srp_det)) + mvotg->phy.otg->state = OTG_STATE_A_WAIT_VRISE; + break; + case OTG_STATE_A_WAIT_VRISE: + if (otg_ctrl->a_vbus_vld) + mvotg->phy.otg->state = OTG_STATE_A_WAIT_BCON; + break; + case OTG_STATE_A_WAIT_BCON: + if (otg_ctrl->id || otg_ctrl->a_bus_drop + || otg_ctrl->a_wait_bcon_timeout) { + mv_otg_cancel_timer(mvotg, A_WAIT_BCON_TIMER); + mvotg->otg_ctrl.a_wait_bcon_timeout = 0; + mvotg->phy.otg->state = OTG_STATE_A_WAIT_VFALL; + otg_ctrl->a_bus_req = 0; + } else if (!otg_ctrl->a_vbus_vld) { + mv_otg_cancel_timer(mvotg, A_WAIT_BCON_TIMER); + mvotg->otg_ctrl.a_wait_bcon_timeout = 0; + mvotg->phy.otg->state = OTG_STATE_A_VBUS_ERR; + } else if (otg_ctrl->b_conn) { + mv_otg_cancel_timer(mvotg, A_WAIT_BCON_TIMER); + mvotg->otg_ctrl.a_wait_bcon_timeout = 0; + mvotg->phy.otg->state = OTG_STATE_A_HOST; + } + break; + case OTG_STATE_A_HOST: + if (otg_ctrl->id || !otg_ctrl->b_conn + || otg_ctrl->a_bus_drop) + mvotg->phy.otg->state = OTG_STATE_A_WAIT_BCON; + else if (!otg_ctrl->a_vbus_vld) + mvotg->phy.otg->state = OTG_STATE_A_VBUS_ERR; + break; + case OTG_STATE_A_WAIT_VFALL: + if (otg_ctrl->id + || (!otg_ctrl->b_conn && otg_ctrl->a_sess_vld) + || otg_ctrl->a_bus_req) + mvotg->phy.otg->state = OTG_STATE_A_IDLE; + break; + case OTG_STATE_A_VBUS_ERR: + if (otg_ctrl->id || otg_ctrl->a_clr_err + || otg_ctrl->a_bus_drop) { + otg_ctrl->a_clr_err = 0; + mvotg->phy.otg->state = OTG_STATE_A_WAIT_VFALL; + } + break; + default: + break; + } +} + +static void mv_otg_work(struct work_struct *work) +{ + struct mv_otg *mvotg; + struct usb_otg *otg; + int old_state; + + mvotg = container_of(to_delayed_work(work), struct mv_otg, work); + +run: + /* work queue is single thread, or we need spin_lock to protect */ + otg = mvotg->phy.otg; + old_state = otg->state; + + if (!mvotg->active) + return; + + mv_otg_update_inputs(mvotg); + mv_otg_update_state(mvotg); + + if (old_state != mvotg->phy.otg->state) { + dev_info(&mvotg->pdev->dev, "change from state %s to %s\n", + state_string[old_state], + state_string[mvotg->phy.otg->state]); + + switch (mvotg->phy.otg->state) { + case OTG_STATE_B_IDLE: + otg->default_a = 0; + if (old_state == OTG_STATE_B_PERIPHERAL) + mv_otg_start_periphrals(mvotg, 0); + mv_otg_reset(mvotg); + mv_otg_disable(mvotg); + usb_phy_set_event(&mvotg->phy, USB_EVENT_NONE); + break; + case OTG_STATE_B_PERIPHERAL: + mv_otg_enable(mvotg); + mv_otg_start_periphrals(mvotg, 1); + usb_phy_set_event(&mvotg->phy, USB_EVENT_ENUMERATED); + break; + case OTG_STATE_A_IDLE: + otg->default_a = 1; + mv_otg_enable(mvotg); + if (old_state == OTG_STATE_A_WAIT_VFALL) + mv_otg_start_host(mvotg, 0); + mv_otg_reset(mvotg); + break; + case OTG_STATE_A_WAIT_VRISE: + mv_otg_set_vbus(otg, 1); + break; + case OTG_STATE_A_WAIT_BCON: + if (old_state != OTG_STATE_A_HOST) + mv_otg_start_host(mvotg, 1); + mv_otg_set_timer(mvotg, A_WAIT_BCON_TIMER, + T_A_WAIT_BCON); + /* + * Now, we directly enter A_HOST. So set b_conn = 1 + * here. In fact, it need host driver to notify us. + */ + mvotg->otg_ctrl.b_conn = 1; + break; + case OTG_STATE_A_HOST: + break; + case OTG_STATE_A_WAIT_VFALL: + /* + * Now, we has exited A_HOST. So set b_conn = 0 + * here. In fact, it need host driver to notify us. + */ + mvotg->otg_ctrl.b_conn = 0; + mv_otg_set_vbus(otg, 0); + break; + case OTG_STATE_A_VBUS_ERR: + break; + default: + break; + } + goto run; + } +} + +static irqreturn_t mv_otg_irq(int irq, void *dev) +{ + struct mv_otg *mvotg = dev; + u32 otgsc; + + otgsc = readl(&mvotg->op_regs->otgsc); + writel(otgsc, &mvotg->op_regs->otgsc); + + /* + * if we have vbus, then the vbus detection for B-device + * will be done by mv_otg_inputs_irq(). + */ + if (mvotg->pdata->vbus) + if ((otgsc & OTGSC_STS_USB_ID) && + !(otgsc & OTGSC_INTSTS_USB_ID)) + return IRQ_NONE; + + if ((otgsc & mvotg->irq_status) == 0) + return IRQ_NONE; + + mv_otg_run_state_machine(mvotg, 0); + + return IRQ_HANDLED; +} + +static irqreturn_t mv_otg_inputs_irq(int irq, void *dev) +{ + struct mv_otg *mvotg = dev; + + /* The clock may disabled at this time */ + if (!mvotg->active) { + mv_otg_enable(mvotg); + mv_otg_init_irq(mvotg); + } + + mv_otg_run_state_machine(mvotg, 0); + + return IRQ_HANDLED; +} + +static ssize_t +a_bus_req_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct mv_otg *mvotg = dev_get_drvdata(dev); + return scnprintf(buf, PAGE_SIZE, "%d\n", + mvotg->otg_ctrl.a_bus_req); +} + +static ssize_t +a_bus_req_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct mv_otg *mvotg = dev_get_drvdata(dev); + + if (count > 2) + return -1; + + /* We will use this interface to change to A device */ + if (mvotg->phy.otg->state != OTG_STATE_B_IDLE + && mvotg->phy.otg->state != OTG_STATE_A_IDLE) + return -1; + + /* The clock may disabled and we need to set irq for ID detected */ + mv_otg_enable(mvotg); + mv_otg_init_irq(mvotg); + + if (buf[0] == '1') { + mvotg->otg_ctrl.a_bus_req = 1; + mvotg->otg_ctrl.a_bus_drop = 0; + dev_dbg(&mvotg->pdev->dev, + "User request: a_bus_req = 1\n"); + + if (spin_trylock(&mvotg->wq_lock)) { + mv_otg_run_state_machine(mvotg, 0); + spin_unlock(&mvotg->wq_lock); + } + } + + return count; +} + +static DEVICE_ATTR_RW(a_bus_req); + +static ssize_t +a_clr_err_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct mv_otg *mvotg = dev_get_drvdata(dev); + if (!mvotg->phy.otg->default_a) + return -1; + + if (count > 2) + return -1; + + if (buf[0] == '1') { + mvotg->otg_ctrl.a_clr_err = 1; + dev_dbg(&mvotg->pdev->dev, + "User request: a_clr_err = 1\n"); + } + + if (spin_trylock(&mvotg->wq_lock)) { + mv_otg_run_state_machine(mvotg, 0); + spin_unlock(&mvotg->wq_lock); + } + + return count; +} + +static DEVICE_ATTR_WO(a_clr_err); + +static ssize_t +a_bus_drop_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct mv_otg *mvotg = dev_get_drvdata(dev); + return scnprintf(buf, PAGE_SIZE, "%d\n", + mvotg->otg_ctrl.a_bus_drop); +} + +static ssize_t +a_bus_drop_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct mv_otg *mvotg = dev_get_drvdata(dev); + if (!mvotg->phy.otg->default_a) + return -1; + + if (count > 2) + return -1; + + if (buf[0] == '0') { + mvotg->otg_ctrl.a_bus_drop = 0; + dev_dbg(&mvotg->pdev->dev, + "User request: a_bus_drop = 0\n"); + } else if (buf[0] == '1') { + mvotg->otg_ctrl.a_bus_drop = 1; + mvotg->otg_ctrl.a_bus_req = 0; + dev_dbg(&mvotg->pdev->dev, + "User request: a_bus_drop = 1\n"); + dev_dbg(&mvotg->pdev->dev, + "User request: and a_bus_req = 0\n"); + } + + if (spin_trylock(&mvotg->wq_lock)) { + mv_otg_run_state_machine(mvotg, 0); + spin_unlock(&mvotg->wq_lock); + } + + return count; +} + +static DEVICE_ATTR_RW(a_bus_drop); + +static struct attribute *inputs_attrs[] = { + &dev_attr_a_bus_req.attr, + &dev_attr_a_clr_err.attr, + &dev_attr_a_bus_drop.attr, + NULL, +}; + +static const struct attribute_group inputs_attr_group = { + .name = "inputs", + .attrs = inputs_attrs, +}; + +static const struct attribute_group *mv_otg_groups[] = { + &inputs_attr_group, + NULL, +}; + +static int mv_otg_remove(struct platform_device *pdev) +{ + struct mv_otg *mvotg = platform_get_drvdata(pdev); + + if (mvotg->qwork) + destroy_workqueue(mvotg->qwork); + + mv_otg_disable(mvotg); + + usb_remove_phy(&mvotg->phy); + + return 0; +} + +static int mv_otg_probe(struct platform_device *pdev) +{ + struct mv_usb_platform_data *pdata = dev_get_platdata(&pdev->dev); + struct mv_otg *mvotg; + struct usb_otg *otg; + struct resource *r; + int retval = 0, i; + + if (pdata == NULL) { + dev_err(&pdev->dev, "failed to get platform data\n"); + return -ENODEV; + } + + mvotg = devm_kzalloc(&pdev->dev, sizeof(*mvotg), GFP_KERNEL); + if (!mvotg) + return -ENOMEM; + + otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL); + if (!otg) + return -ENOMEM; + + platform_set_drvdata(pdev, mvotg); + + mvotg->pdev = pdev; + mvotg->pdata = pdata; + + mvotg->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(mvotg->clk)) + return PTR_ERR(mvotg->clk); + + mvotg->qwork = create_singlethread_workqueue("mv_otg_queue"); + if (!mvotg->qwork) { + dev_dbg(&pdev->dev, "cannot create workqueue for OTG\n"); + return -ENOMEM; + } + + INIT_DELAYED_WORK(&mvotg->work, mv_otg_work); + + /* OTG common part */ + mvotg->pdev = pdev; + mvotg->phy.dev = &pdev->dev; + mvotg->phy.otg = otg; + mvotg->phy.label = driver_name; + + otg->state = OTG_STATE_UNDEFINED; + otg->usb_phy = &mvotg->phy; + otg->set_host = mv_otg_set_host; + otg->set_peripheral = mv_otg_set_peripheral; + otg->set_vbus = mv_otg_set_vbus; + + for (i = 0; i < OTG_TIMER_NUM; i++) + timer_setup(&mvotg->otg_ctrl.timer[i], + mv_otg_timer_await_bcon, 0); + + r = platform_get_resource_byname(mvotg->pdev, + IORESOURCE_MEM, "phyregs"); + if (r == NULL) { + dev_err(&pdev->dev, "no phy I/O memory resource defined\n"); + retval = -ENODEV; + goto err_destroy_workqueue; + } + + mvotg->phy_regs = devm_ioremap(&pdev->dev, r->start, resource_size(r)); + if (mvotg->phy_regs == NULL) { + dev_err(&pdev->dev, "failed to map phy I/O memory\n"); + retval = -EFAULT; + goto err_destroy_workqueue; + } + + r = platform_get_resource_byname(mvotg->pdev, + IORESOURCE_MEM, "capregs"); + if (r == NULL) { + dev_err(&pdev->dev, "no I/O memory resource defined\n"); + retval = -ENODEV; + goto err_destroy_workqueue; + } + + mvotg->cap_regs = devm_ioremap(&pdev->dev, r->start, resource_size(r)); + if (mvotg->cap_regs == NULL) { + dev_err(&pdev->dev, "failed to map I/O memory\n"); + retval = -EFAULT; + goto err_destroy_workqueue; + } + + /* we will acces controller register, so enable the udc controller */ + retval = mv_otg_enable_internal(mvotg); + if (retval) { + dev_err(&pdev->dev, "mv otg enable error %d\n", retval); + goto err_destroy_workqueue; + } + + mvotg->op_regs = + (struct mv_otg_regs __iomem *) ((unsigned long) mvotg->cap_regs + + (readl(mvotg->cap_regs) & CAPLENGTH_MASK)); + + if (pdata->id) { + retval = devm_request_threaded_irq(&pdev->dev, pdata->id->irq, + NULL, mv_otg_inputs_irq, + IRQF_ONESHOT, "id", mvotg); + if (retval) { + dev_info(&pdev->dev, + "Failed to request irq for ID\n"); + pdata->id = NULL; + } + } + + if (pdata->vbus) { + mvotg->clock_gating = 1; + retval = devm_request_threaded_irq(&pdev->dev, pdata->vbus->irq, + NULL, mv_otg_inputs_irq, + IRQF_ONESHOT, "vbus", mvotg); + if (retval) { + dev_info(&pdev->dev, + "Failed to request irq for VBUS, " + "disable clock gating\n"); + mvotg->clock_gating = 0; + pdata->vbus = NULL; + } + } + + if (pdata->disable_otg_clock_gating) + mvotg->clock_gating = 0; + + mv_otg_reset(mvotg); + mv_otg_init_irq(mvotg); + + r = platform_get_resource(mvotg->pdev, IORESOURCE_IRQ, 0); + if (r == NULL) { + dev_err(&pdev->dev, "no IRQ resource defined\n"); + retval = -ENODEV; + goto err_disable_clk; + } + + mvotg->irq = r->start; + if (devm_request_irq(&pdev->dev, mvotg->irq, mv_otg_irq, IRQF_SHARED, + driver_name, mvotg)) { + dev_err(&pdev->dev, "Request irq %d for OTG failed\n", + mvotg->irq); + mvotg->irq = 0; + retval = -ENODEV; + goto err_disable_clk; + } + + retval = usb_add_phy(&mvotg->phy, USB_PHY_TYPE_USB2); + if (retval < 0) { + dev_err(&pdev->dev, "can't register transceiver, %d\n", + retval); + goto err_disable_clk; + } + + spin_lock_init(&mvotg->wq_lock); + if (spin_trylock(&mvotg->wq_lock)) { + mv_otg_run_state_machine(mvotg, 2 * HZ); + spin_unlock(&mvotg->wq_lock); + } + + dev_info(&pdev->dev, + "successful probe OTG device %s clock gating.\n", + mvotg->clock_gating ? "with" : "without"); + + return 0; + +err_disable_clk: + mv_otg_disable_internal(mvotg); +err_destroy_workqueue: + destroy_workqueue(mvotg->qwork); + + return retval; +} + +#ifdef CONFIG_PM +static int mv_otg_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct mv_otg *mvotg = platform_get_drvdata(pdev); + + if (mvotg->phy.otg->state != OTG_STATE_B_IDLE) { + dev_info(&pdev->dev, + "OTG state is not B_IDLE, it is %d!\n", + mvotg->phy.otg->state); + return -EAGAIN; + } + + if (!mvotg->clock_gating) + mv_otg_disable_internal(mvotg); + + return 0; +} + +static int mv_otg_resume(struct platform_device *pdev) +{ + struct mv_otg *mvotg = platform_get_drvdata(pdev); + u32 otgsc; + + if (!mvotg->clock_gating) { + mv_otg_enable_internal(mvotg); + + otgsc = readl(&mvotg->op_regs->otgsc); + otgsc |= mvotg->irq_en; + writel(otgsc, &mvotg->op_regs->otgsc); + + if (spin_trylock(&mvotg->wq_lock)) { + mv_otg_run_state_machine(mvotg, 0); + spin_unlock(&mvotg->wq_lock); + } + } + return 0; +} +#endif + +static struct platform_driver mv_otg_driver = { + .probe = mv_otg_probe, + .remove = mv_otg_remove, + .driver = { + .name = driver_name, + .dev_groups = mv_otg_groups, + }, +#ifdef CONFIG_PM + .suspend = mv_otg_suspend, + .resume = mv_otg_resume, +#endif +}; +module_platform_driver(mv_otg_driver); diff --git a/drivers/usb/phy/phy-mv-usb.h b/drivers/usb/phy/phy-mv-usb.h new file mode 100644 index 000000000..5d5c0abb0 --- /dev/null +++ b/drivers/usb/phy/phy-mv-usb.h @@ -0,0 +1,160 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2011 Marvell International Ltd. All rights reserved. + */ + +#ifndef __MV_USB_OTG_CONTROLLER__ +#define __MV_USB_OTG_CONTROLLER__ + +#include <linux/types.h> + +/* Command Register Bit Masks */ +#define USBCMD_RUN_STOP (0x00000001) +#define USBCMD_CTRL_RESET (0x00000002) + +/* otgsc Register Bit Masks */ +#define OTGSC_CTRL_VUSB_DISCHARGE 0x00000001 +#define OTGSC_CTRL_VUSB_CHARGE 0x00000002 +#define OTGSC_CTRL_OTG_TERM 0x00000008 +#define OTGSC_CTRL_DATA_PULSING 0x00000010 +#define OTGSC_STS_USB_ID 0x00000100 +#define OTGSC_STS_A_VBUS_VALID 0x00000200 +#define OTGSC_STS_A_SESSION_VALID 0x00000400 +#define OTGSC_STS_B_SESSION_VALID 0x00000800 +#define OTGSC_STS_B_SESSION_END 0x00001000 +#define OTGSC_STS_1MS_TOGGLE 0x00002000 +#define OTGSC_STS_DATA_PULSING 0x00004000 +#define OTGSC_INTSTS_USB_ID 0x00010000 +#define OTGSC_INTSTS_A_VBUS_VALID 0x00020000 +#define OTGSC_INTSTS_A_SESSION_VALID 0x00040000 +#define OTGSC_INTSTS_B_SESSION_VALID 0x00080000 +#define OTGSC_INTSTS_B_SESSION_END 0x00100000 +#define OTGSC_INTSTS_1MS 0x00200000 +#define OTGSC_INTSTS_DATA_PULSING 0x00400000 +#define OTGSC_INTR_USB_ID 0x01000000 +#define OTGSC_INTR_A_VBUS_VALID 0x02000000 +#define OTGSC_INTR_A_SESSION_VALID 0x04000000 +#define OTGSC_INTR_B_SESSION_VALID 0x08000000 +#define OTGSC_INTR_B_SESSION_END 0x10000000 +#define OTGSC_INTR_1MS_TIMER 0x20000000 +#define OTGSC_INTR_DATA_PULSING 0x40000000 + +#define CAPLENGTH_MASK (0xff) + +/* Timer's interval, unit 10ms */ +#define T_A_WAIT_VRISE 100 +#define T_A_WAIT_BCON 2000 +#define T_A_AIDL_BDIS 100 +#define T_A_BIDL_ADIS 20 +#define T_B_ASE0_BRST 400 +#define T_B_SE0_SRP 300 +#define T_B_SRP_FAIL 2000 +#define T_B_DATA_PLS 10 +#define T_B_SRP_INIT 100 +#define T_A_SRP_RSPNS 10 +#define T_A_DRV_RSM 5 + +enum otg_function { + OTG_B_DEVICE = 0, + OTG_A_DEVICE +}; + +enum mv_otg_timer { + A_WAIT_BCON_TIMER = 0, + OTG_TIMER_NUM +}; + +/* PXA OTG state machine */ +struct mv_otg_ctrl { + /* internal variables */ + u8 a_set_b_hnp_en; /* A-Device set b_hnp_en */ + u8 b_srp_done; + u8 b_hnp_en; + + /* OTG inputs */ + u8 a_bus_drop; + u8 a_bus_req; + u8 a_clr_err; + u8 a_bus_resume; + u8 a_bus_suspend; + u8 a_conn; + u8 a_sess_vld; + u8 a_srp_det; + u8 a_vbus_vld; + u8 b_bus_req; /* B-Device Require Bus */ + u8 b_bus_resume; + u8 b_bus_suspend; + u8 b_conn; + u8 b_se0_srp; + u8 b_sess_end; + u8 b_sess_vld; + u8 id; + u8 a_suspend_req; + + /*Timer event */ + u8 a_aidl_bdis_timeout; + u8 b_ase0_brst_timeout; + u8 a_bidl_adis_timeout; + u8 a_wait_bcon_timeout; + + struct timer_list timer[OTG_TIMER_NUM]; +}; + +#define VUSBHS_MAX_PORTS 8 + +struct mv_otg_regs { + u32 usbcmd; /* Command register */ + u32 usbsts; /* Status register */ + u32 usbintr; /* Interrupt enable */ + u32 frindex; /* Frame index */ + u32 reserved1[1]; + u32 deviceaddr; /* Device Address */ + u32 eplistaddr; /* Endpoint List Address */ + u32 ttctrl; /* HOST TT status and control */ + u32 burstsize; /* Programmable Burst Size */ + u32 txfilltuning; /* Host Transmit Pre-Buffer Packet Tuning */ + u32 reserved[4]; + u32 epnak; /* Endpoint NAK */ + u32 epnaken; /* Endpoint NAK Enable */ + u32 configflag; /* Configured Flag register */ + u32 portsc[VUSBHS_MAX_PORTS]; /* Port Status/Control x, x = 1..8 */ + u32 otgsc; + u32 usbmode; /* USB Host/Device mode */ + u32 epsetupstat; /* Endpoint Setup Status */ + u32 epprime; /* Endpoint Initialize */ + u32 epflush; /* Endpoint De-initialize */ + u32 epstatus; /* Endpoint Status */ + u32 epcomplete; /* Endpoint Interrupt On Complete */ + u32 epctrlx[16]; /* Endpoint Control, where x = 0.. 15 */ + u32 mcr; /* Mux Control */ + u32 isr; /* Interrupt Status */ + u32 ier; /* Interrupt Enable */ +}; + +struct mv_otg { + struct usb_phy phy; + struct mv_otg_ctrl otg_ctrl; + + /* base address */ + void __iomem *phy_regs; + void __iomem *cap_regs; + struct mv_otg_regs __iomem *op_regs; + + struct platform_device *pdev; + int irq; + u32 irq_status; + u32 irq_en; + + struct delayed_work work; + struct workqueue_struct *qwork; + + spinlock_t wq_lock; + + struct mv_usb_platform_data *pdata; + + unsigned int active; + unsigned int clock_gating; + struct clk *clk; +}; + +#endif diff --git a/drivers/usb/phy/phy-mxs-usb.c b/drivers/usb/phy/phy-mxs-usb.c new file mode 100644 index 000000000..160c92643 --- /dev/null +++ b/drivers/usb/phy/phy-mxs-usb.c @@ -0,0 +1,873 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2012-2014 Freescale Semiconductor, Inc. + * Copyright (C) 2012 Marek Vasut <marex@denx.de> + * on behalf of DENX Software Engineering GmbH + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/clk.h> +#include <linux/usb/otg.h> +#include <linux/stmp_device.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/of_device.h> +#include <linux/regmap.h> +#include <linux/mfd/syscon.h> +#include <linux/iopoll.h> + +#define DRIVER_NAME "mxs_phy" + +/* Register Macro */ +#define HW_USBPHY_PWD 0x00 +#define HW_USBPHY_TX 0x10 +#define HW_USBPHY_CTRL 0x30 +#define HW_USBPHY_CTRL_SET 0x34 +#define HW_USBPHY_CTRL_CLR 0x38 + +#define HW_USBPHY_DEBUG_SET 0x54 +#define HW_USBPHY_DEBUG_CLR 0x58 + +#define HW_USBPHY_IP 0x90 +#define HW_USBPHY_IP_SET 0x94 +#define HW_USBPHY_IP_CLR 0x98 + +#define GM_USBPHY_TX_TXCAL45DP(x) (((x) & 0xf) << 16) +#define GM_USBPHY_TX_TXCAL45DN(x) (((x) & 0xf) << 8) +#define GM_USBPHY_TX_D_CAL(x) (((x) & 0xf) << 0) + +/* imx7ulp */ +#define HW_USBPHY_PLL_SIC 0xa0 +#define HW_USBPHY_PLL_SIC_SET 0xa4 +#define HW_USBPHY_PLL_SIC_CLR 0xa8 + +#define BM_USBPHY_CTRL_SFTRST BIT(31) +#define BM_USBPHY_CTRL_CLKGATE BIT(30) +#define BM_USBPHY_CTRL_OTG_ID_VALUE BIT(27) +#define BM_USBPHY_CTRL_ENAUTOSET_USBCLKS BIT(26) +#define BM_USBPHY_CTRL_ENAUTOCLR_USBCLKGATE BIT(25) +#define BM_USBPHY_CTRL_ENVBUSCHG_WKUP BIT(23) +#define BM_USBPHY_CTRL_ENIDCHG_WKUP BIT(22) +#define BM_USBPHY_CTRL_ENDPDMCHG_WKUP BIT(21) +#define BM_USBPHY_CTRL_ENAUTOCLR_PHY_PWD BIT(20) +#define BM_USBPHY_CTRL_ENAUTOCLR_CLKGATE BIT(19) +#define BM_USBPHY_CTRL_ENAUTO_PWRON_PLL BIT(18) +#define BM_USBPHY_CTRL_ENUTMILEVEL3 BIT(15) +#define BM_USBPHY_CTRL_ENUTMILEVEL2 BIT(14) +#define BM_USBPHY_CTRL_ENHOSTDISCONDETECT BIT(1) + +#define BM_USBPHY_IP_FIX (BIT(17) | BIT(18)) + +#define BM_USBPHY_DEBUG_CLKGATE BIT(30) +/* imx7ulp */ +#define BM_USBPHY_PLL_LOCK BIT(31) +#define BM_USBPHY_PLL_REG_ENABLE BIT(21) +#define BM_USBPHY_PLL_BYPASS BIT(16) +#define BM_USBPHY_PLL_POWER BIT(12) +#define BM_USBPHY_PLL_EN_USB_CLKS BIT(6) + +/* Anatop Registers */ +#define ANADIG_ANA_MISC0 0x150 +#define ANADIG_ANA_MISC0_SET 0x154 +#define ANADIG_ANA_MISC0_CLR 0x158 + +#define ANADIG_USB1_CHRG_DETECT_SET 0x1b4 +#define ANADIG_USB1_CHRG_DETECT_CLR 0x1b8 +#define ANADIG_USB2_CHRG_DETECT_SET 0x214 +#define ANADIG_USB1_CHRG_DETECT_EN_B BIT(20) +#define ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B BIT(19) +#define ANADIG_USB1_CHRG_DETECT_CHK_CONTACT BIT(18) + +#define ANADIG_USB1_VBUS_DET_STAT 0x1c0 +#define ANADIG_USB1_VBUS_DET_STAT_VBUS_VALID BIT(3) + +#define ANADIG_USB1_CHRG_DET_STAT 0x1d0 +#define ANADIG_USB1_CHRG_DET_STAT_DM_STATE BIT(2) +#define ANADIG_USB1_CHRG_DET_STAT_CHRG_DETECTED BIT(1) +#define ANADIG_USB1_CHRG_DET_STAT_PLUG_CONTACT BIT(0) + +#define ANADIG_USB2_VBUS_DET_STAT 0x220 + +#define ANADIG_USB1_LOOPBACK_SET 0x1e4 +#define ANADIG_USB1_LOOPBACK_CLR 0x1e8 +#define ANADIG_USB1_LOOPBACK_UTMI_TESTSTART BIT(0) + +#define ANADIG_USB2_LOOPBACK_SET 0x244 +#define ANADIG_USB2_LOOPBACK_CLR 0x248 + +#define ANADIG_USB1_MISC 0x1f0 +#define ANADIG_USB2_MISC 0x250 + +#define BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG BIT(12) +#define BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG_SL BIT(11) + +#define BM_ANADIG_USB1_VBUS_DET_STAT_VBUS_VALID BIT(3) +#define BM_ANADIG_USB2_VBUS_DET_STAT_VBUS_VALID BIT(3) + +#define BM_ANADIG_USB1_LOOPBACK_UTMI_DIG_TST1 BIT(2) +#define BM_ANADIG_USB1_LOOPBACK_TSTI_TX_EN BIT(5) +#define BM_ANADIG_USB2_LOOPBACK_UTMI_DIG_TST1 BIT(2) +#define BM_ANADIG_USB2_LOOPBACK_TSTI_TX_EN BIT(5) + +#define BM_ANADIG_USB1_MISC_RX_VPIN_FS BIT(29) +#define BM_ANADIG_USB1_MISC_RX_VMIN_FS BIT(28) +#define BM_ANADIG_USB2_MISC_RX_VPIN_FS BIT(29) +#define BM_ANADIG_USB2_MISC_RX_VMIN_FS BIT(28) + +#define to_mxs_phy(p) container_of((p), struct mxs_phy, phy) + +/* Do disconnection between PHY and controller without vbus */ +#define MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS BIT(0) + +/* + * The PHY will be in messy if there is a wakeup after putting + * bus to suspend (set portsc.suspendM) but before setting PHY to low + * power mode (set portsc.phcd). + */ +#define MXS_PHY_ABNORMAL_IN_SUSPEND BIT(1) + +/* + * The SOF sends too fast after resuming, it will cause disconnection + * between host and high speed device. + */ +#define MXS_PHY_SENDING_SOF_TOO_FAST BIT(2) + +/* + * IC has bug fixes logic, they include + * MXS_PHY_ABNORMAL_IN_SUSPEND and MXS_PHY_SENDING_SOF_TOO_FAST + * which are described at above flags, the RTL will handle it + * according to different versions. + */ +#define MXS_PHY_NEED_IP_FIX BIT(3) + +/* Minimum and maximum values for device tree entries */ +#define MXS_PHY_TX_CAL45_MIN 35 +#define MXS_PHY_TX_CAL45_MAX 54 +#define MXS_PHY_TX_D_CAL_MIN 79 +#define MXS_PHY_TX_D_CAL_MAX 119 + +struct mxs_phy_data { + unsigned int flags; +}; + +static const struct mxs_phy_data imx23_phy_data = { + .flags = MXS_PHY_ABNORMAL_IN_SUSPEND | MXS_PHY_SENDING_SOF_TOO_FAST, +}; + +static const struct mxs_phy_data imx6q_phy_data = { + .flags = MXS_PHY_SENDING_SOF_TOO_FAST | + MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS | + MXS_PHY_NEED_IP_FIX, +}; + +static const struct mxs_phy_data imx6sl_phy_data = { + .flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS | + MXS_PHY_NEED_IP_FIX, +}; + +static const struct mxs_phy_data vf610_phy_data = { + .flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS | + MXS_PHY_NEED_IP_FIX, +}; + +static const struct mxs_phy_data imx6sx_phy_data = { + .flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS, +}; + +static const struct mxs_phy_data imx6ul_phy_data = { + .flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS, +}; + +static const struct mxs_phy_data imx7ulp_phy_data = { +}; + +static const struct of_device_id mxs_phy_dt_ids[] = { + { .compatible = "fsl,imx6sx-usbphy", .data = &imx6sx_phy_data, }, + { .compatible = "fsl,imx6sl-usbphy", .data = &imx6sl_phy_data, }, + { .compatible = "fsl,imx6q-usbphy", .data = &imx6q_phy_data, }, + { .compatible = "fsl,imx23-usbphy", .data = &imx23_phy_data, }, + { .compatible = "fsl,vf610-usbphy", .data = &vf610_phy_data, }, + { .compatible = "fsl,imx6ul-usbphy", .data = &imx6ul_phy_data, }, + { .compatible = "fsl,imx7ulp-usbphy", .data = &imx7ulp_phy_data, }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, mxs_phy_dt_ids); + +struct mxs_phy { + struct usb_phy phy; + struct clk *clk; + const struct mxs_phy_data *data; + struct regmap *regmap_anatop; + int port_id; + u32 tx_reg_set; + u32 tx_reg_mask; +}; + +static inline bool is_imx6q_phy(struct mxs_phy *mxs_phy) +{ + return mxs_phy->data == &imx6q_phy_data; +} + +static inline bool is_imx6sl_phy(struct mxs_phy *mxs_phy) +{ + return mxs_phy->data == &imx6sl_phy_data; +} + +static inline bool is_imx7ulp_phy(struct mxs_phy *mxs_phy) +{ + return mxs_phy->data == &imx7ulp_phy_data; +} + +/* + * PHY needs some 32K cycles to switch from 32K clock to + * bus (such as AHB/AXI, etc) clock. + */ +static void mxs_phy_clock_switch_delay(void) +{ + usleep_range(300, 400); +} + +static void mxs_phy_tx_init(struct mxs_phy *mxs_phy) +{ + void __iomem *base = mxs_phy->phy.io_priv; + u32 phytx; + + /* Update TX register if there is anything to write */ + if (mxs_phy->tx_reg_mask) { + phytx = readl(base + HW_USBPHY_TX); + phytx &= ~mxs_phy->tx_reg_mask; + phytx |= mxs_phy->tx_reg_set; + writel(phytx, base + HW_USBPHY_TX); + } +} + +static int mxs_phy_pll_enable(void __iomem *base, bool enable) +{ + int ret = 0; + + if (enable) { + u32 value; + + writel(BM_USBPHY_PLL_REG_ENABLE, base + HW_USBPHY_PLL_SIC_SET); + writel(BM_USBPHY_PLL_BYPASS, base + HW_USBPHY_PLL_SIC_CLR); + writel(BM_USBPHY_PLL_POWER, base + HW_USBPHY_PLL_SIC_SET); + ret = readl_poll_timeout(base + HW_USBPHY_PLL_SIC, + value, (value & BM_USBPHY_PLL_LOCK) != 0, + 100, 10000); + if (ret) + return ret; + + writel(BM_USBPHY_PLL_EN_USB_CLKS, base + + HW_USBPHY_PLL_SIC_SET); + } else { + writel(BM_USBPHY_PLL_EN_USB_CLKS, base + + HW_USBPHY_PLL_SIC_CLR); + writel(BM_USBPHY_PLL_POWER, base + HW_USBPHY_PLL_SIC_CLR); + writel(BM_USBPHY_PLL_BYPASS, base + HW_USBPHY_PLL_SIC_SET); + writel(BM_USBPHY_PLL_REG_ENABLE, base + HW_USBPHY_PLL_SIC_CLR); + } + + return ret; +} + +static int mxs_phy_hw_init(struct mxs_phy *mxs_phy) +{ + int ret; + void __iomem *base = mxs_phy->phy.io_priv; + + if (is_imx7ulp_phy(mxs_phy)) { + ret = mxs_phy_pll_enable(base, true); + if (ret) + return ret; + } + + ret = stmp_reset_block(base + HW_USBPHY_CTRL); + if (ret) + goto disable_pll; + + /* Power up the PHY */ + writel(0, base + HW_USBPHY_PWD); + + /* + * USB PHY Ctrl Setting + * - Auto clock/power on + * - Enable full/low speed support + */ + writel(BM_USBPHY_CTRL_ENAUTOSET_USBCLKS | + BM_USBPHY_CTRL_ENAUTOCLR_USBCLKGATE | + BM_USBPHY_CTRL_ENAUTOCLR_PHY_PWD | + BM_USBPHY_CTRL_ENAUTOCLR_CLKGATE | + BM_USBPHY_CTRL_ENAUTO_PWRON_PLL | + BM_USBPHY_CTRL_ENUTMILEVEL2 | + BM_USBPHY_CTRL_ENUTMILEVEL3, + base + HW_USBPHY_CTRL_SET); + + if (mxs_phy->data->flags & MXS_PHY_NEED_IP_FIX) + writel(BM_USBPHY_IP_FIX, base + HW_USBPHY_IP_SET); + + if (mxs_phy->regmap_anatop) { + unsigned int reg = mxs_phy->port_id ? + ANADIG_USB1_CHRG_DETECT_SET : + ANADIG_USB2_CHRG_DETECT_SET; + /* + * The external charger detector needs to be disabled, + * or the signal at DP will be poor + */ + regmap_write(mxs_phy->regmap_anatop, reg, + ANADIG_USB1_CHRG_DETECT_EN_B | + ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B); + } + + mxs_phy_tx_init(mxs_phy); + + return 0; + +disable_pll: + if (is_imx7ulp_phy(mxs_phy)) + mxs_phy_pll_enable(base, false); + return ret; +} + +/* Return true if the vbus is there */ +static bool mxs_phy_get_vbus_status(struct mxs_phy *mxs_phy) +{ + unsigned int vbus_value = 0; + + if (!mxs_phy->regmap_anatop) + return false; + + if (mxs_phy->port_id == 0) + regmap_read(mxs_phy->regmap_anatop, + ANADIG_USB1_VBUS_DET_STAT, + &vbus_value); + else if (mxs_phy->port_id == 1) + regmap_read(mxs_phy->regmap_anatop, + ANADIG_USB2_VBUS_DET_STAT, + &vbus_value); + + if (vbus_value & BM_ANADIG_USB1_VBUS_DET_STAT_VBUS_VALID) + return true; + else + return false; +} + +static void __mxs_phy_disconnect_line(struct mxs_phy *mxs_phy, bool disconnect) +{ + void __iomem *base = mxs_phy->phy.io_priv; + u32 reg; + + if (disconnect) + writel_relaxed(BM_USBPHY_DEBUG_CLKGATE, + base + HW_USBPHY_DEBUG_CLR); + + if (mxs_phy->port_id == 0) { + reg = disconnect ? ANADIG_USB1_LOOPBACK_SET + : ANADIG_USB1_LOOPBACK_CLR; + regmap_write(mxs_phy->regmap_anatop, reg, + BM_ANADIG_USB1_LOOPBACK_UTMI_DIG_TST1 | + BM_ANADIG_USB1_LOOPBACK_TSTI_TX_EN); + } else if (mxs_phy->port_id == 1) { + reg = disconnect ? ANADIG_USB2_LOOPBACK_SET + : ANADIG_USB2_LOOPBACK_CLR; + regmap_write(mxs_phy->regmap_anatop, reg, + BM_ANADIG_USB2_LOOPBACK_UTMI_DIG_TST1 | + BM_ANADIG_USB2_LOOPBACK_TSTI_TX_EN); + } + + if (!disconnect) + writel_relaxed(BM_USBPHY_DEBUG_CLKGATE, + base + HW_USBPHY_DEBUG_SET); + + /* Delay some time, and let Linestate be SE0 for controller */ + if (disconnect) + usleep_range(500, 1000); +} + +static bool mxs_phy_is_otg_host(struct mxs_phy *mxs_phy) +{ + return mxs_phy->phy.last_event == USB_EVENT_ID; +} + +static void mxs_phy_disconnect_line(struct mxs_phy *mxs_phy, bool on) +{ + bool vbus_is_on = false; + + /* If the SoCs don't need to disconnect line without vbus, quit */ + if (!(mxs_phy->data->flags & MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS)) + return; + + /* If the SoCs don't have anatop, quit */ + if (!mxs_phy->regmap_anatop) + return; + + vbus_is_on = mxs_phy_get_vbus_status(mxs_phy); + + if (on && !vbus_is_on && !mxs_phy_is_otg_host(mxs_phy)) + __mxs_phy_disconnect_line(mxs_phy, true); + else + __mxs_phy_disconnect_line(mxs_phy, false); + +} + +static int mxs_phy_init(struct usb_phy *phy) +{ + int ret; + struct mxs_phy *mxs_phy = to_mxs_phy(phy); + + mxs_phy_clock_switch_delay(); + ret = clk_prepare_enable(mxs_phy->clk); + if (ret) + return ret; + + return mxs_phy_hw_init(mxs_phy); +} + +static void mxs_phy_shutdown(struct usb_phy *phy) +{ + struct mxs_phy *mxs_phy = to_mxs_phy(phy); + u32 value = BM_USBPHY_CTRL_ENVBUSCHG_WKUP | + BM_USBPHY_CTRL_ENDPDMCHG_WKUP | + BM_USBPHY_CTRL_ENIDCHG_WKUP | + BM_USBPHY_CTRL_ENAUTOSET_USBCLKS | + BM_USBPHY_CTRL_ENAUTOCLR_USBCLKGATE | + BM_USBPHY_CTRL_ENAUTOCLR_PHY_PWD | + BM_USBPHY_CTRL_ENAUTOCLR_CLKGATE | + BM_USBPHY_CTRL_ENAUTO_PWRON_PLL; + + writel(value, phy->io_priv + HW_USBPHY_CTRL_CLR); + writel(0xffffffff, phy->io_priv + HW_USBPHY_PWD); + + writel(BM_USBPHY_CTRL_CLKGATE, + phy->io_priv + HW_USBPHY_CTRL_SET); + + if (is_imx7ulp_phy(mxs_phy)) + mxs_phy_pll_enable(phy->io_priv, false); + + clk_disable_unprepare(mxs_phy->clk); +} + +static bool mxs_phy_is_low_speed_connection(struct mxs_phy *mxs_phy) +{ + unsigned int line_state; + /* bit definition is the same for all controllers */ + unsigned int dp_bit = BM_ANADIG_USB1_MISC_RX_VPIN_FS, + dm_bit = BM_ANADIG_USB1_MISC_RX_VMIN_FS; + unsigned int reg = ANADIG_USB1_MISC; + + /* If the SoCs don't have anatop, quit */ + if (!mxs_phy->regmap_anatop) + return false; + + if (mxs_phy->port_id == 0) + reg = ANADIG_USB1_MISC; + else if (mxs_phy->port_id == 1) + reg = ANADIG_USB2_MISC; + + regmap_read(mxs_phy->regmap_anatop, reg, &line_state); + + if ((line_state & (dp_bit | dm_bit)) == dm_bit) + return true; + else + return false; +} + +static int mxs_phy_suspend(struct usb_phy *x, int suspend) +{ + int ret; + struct mxs_phy *mxs_phy = to_mxs_phy(x); + bool low_speed_connection, vbus_is_on; + + low_speed_connection = mxs_phy_is_low_speed_connection(mxs_phy); + vbus_is_on = mxs_phy_get_vbus_status(mxs_phy); + + if (suspend) { + /* + * FIXME: Do not power down RXPWD1PT1 bit for low speed + * connect. The low speed connection will have problem at + * very rare cases during usb suspend and resume process. + */ + if (low_speed_connection & vbus_is_on) { + /* + * If value to be set as pwd value is not 0xffffffff, + * several 32Khz cycles are needed. + */ + mxs_phy_clock_switch_delay(); + writel(0xffbfffff, x->io_priv + HW_USBPHY_PWD); + } else { + writel(0xffffffff, x->io_priv + HW_USBPHY_PWD); + } + writel(BM_USBPHY_CTRL_CLKGATE, + x->io_priv + HW_USBPHY_CTRL_SET); + clk_disable_unprepare(mxs_phy->clk); + } else { + mxs_phy_clock_switch_delay(); + ret = clk_prepare_enable(mxs_phy->clk); + if (ret) + return ret; + writel(BM_USBPHY_CTRL_CLKGATE, + x->io_priv + HW_USBPHY_CTRL_CLR); + writel(0, x->io_priv + HW_USBPHY_PWD); + } + + return 0; +} + +static int mxs_phy_set_wakeup(struct usb_phy *x, bool enabled) +{ + struct mxs_phy *mxs_phy = to_mxs_phy(x); + u32 value = BM_USBPHY_CTRL_ENVBUSCHG_WKUP | + BM_USBPHY_CTRL_ENDPDMCHG_WKUP | + BM_USBPHY_CTRL_ENIDCHG_WKUP; + if (enabled) { + mxs_phy_disconnect_line(mxs_phy, true); + writel_relaxed(value, x->io_priv + HW_USBPHY_CTRL_SET); + } else { + writel_relaxed(value, x->io_priv + HW_USBPHY_CTRL_CLR); + mxs_phy_disconnect_line(mxs_phy, false); + } + + return 0; +} + +static int mxs_phy_on_connect(struct usb_phy *phy, + enum usb_device_speed speed) +{ + dev_dbg(phy->dev, "%s device has connected\n", + (speed == USB_SPEED_HIGH) ? "HS" : "FS/LS"); + + if (speed == USB_SPEED_HIGH) + writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT, + phy->io_priv + HW_USBPHY_CTRL_SET); + + return 0; +} + +static int mxs_phy_on_disconnect(struct usb_phy *phy, + enum usb_device_speed speed) +{ + dev_dbg(phy->dev, "%s device has disconnected\n", + (speed == USB_SPEED_HIGH) ? "HS" : "FS/LS"); + + /* Sometimes, the speed is not high speed when the error occurs */ + if (readl(phy->io_priv + HW_USBPHY_CTRL) & + BM_USBPHY_CTRL_ENHOSTDISCONDETECT) + writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT, + phy->io_priv + HW_USBPHY_CTRL_CLR); + + return 0; +} + +#define MXS_USB_CHARGER_DATA_CONTACT_TIMEOUT 100 +static int mxs_charger_data_contact_detect(struct mxs_phy *x) +{ + struct regmap *regmap = x->regmap_anatop; + int i, stable_contact_count = 0; + u32 val; + + /* Check if vbus is valid */ + regmap_read(regmap, ANADIG_USB1_VBUS_DET_STAT, &val); + if (!(val & ANADIG_USB1_VBUS_DET_STAT_VBUS_VALID)) { + dev_err(x->phy.dev, "vbus is not valid\n"); + return -EINVAL; + } + + /* Enable charger detector */ + regmap_write(regmap, ANADIG_USB1_CHRG_DETECT_CLR, + ANADIG_USB1_CHRG_DETECT_EN_B); + /* + * - Do not check whether a charger is connected to the USB port + * - Check whether the USB plug has been in contact with each other + */ + regmap_write(regmap, ANADIG_USB1_CHRG_DETECT_SET, + ANADIG_USB1_CHRG_DETECT_CHK_CONTACT | + ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B); + + /* Check if plug is connected */ + for (i = 0; i < MXS_USB_CHARGER_DATA_CONTACT_TIMEOUT; i++) { + regmap_read(regmap, ANADIG_USB1_CHRG_DET_STAT, &val); + if (val & ANADIG_USB1_CHRG_DET_STAT_PLUG_CONTACT) { + stable_contact_count++; + if (stable_contact_count > 5) + /* Data pin makes contact */ + break; + else + usleep_range(5000, 10000); + } else { + stable_contact_count = 0; + usleep_range(5000, 6000); + } + } + + if (i == MXS_USB_CHARGER_DATA_CONTACT_TIMEOUT) { + dev_err(x->phy.dev, + "Data pin can't make good contact.\n"); + /* Disable charger detector */ + regmap_write(regmap, ANADIG_USB1_CHRG_DETECT_SET, + ANADIG_USB1_CHRG_DETECT_EN_B | + ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B); + return -ENXIO; + } + + return 0; +} + +static enum usb_charger_type mxs_charger_primary_detection(struct mxs_phy *x) +{ + struct regmap *regmap = x->regmap_anatop; + enum usb_charger_type chgr_type = UNKNOWN_TYPE; + u32 val; + + /* + * - Do check whether a charger is connected to the USB port + * - Do not Check whether the USB plug has been in contact with + * each other + */ + regmap_write(regmap, ANADIG_USB1_CHRG_DETECT_CLR, + ANADIG_USB1_CHRG_DETECT_CHK_CONTACT | + ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B); + + msleep(100); + + /* Check if it is a charger */ + regmap_read(regmap, ANADIG_USB1_CHRG_DET_STAT, &val); + if (!(val & ANADIG_USB1_CHRG_DET_STAT_CHRG_DETECTED)) { + chgr_type = SDP_TYPE; + dev_dbg(x->phy.dev, "It is a standard downstream port\n"); + } + + /* Disable charger detector */ + regmap_write(regmap, ANADIG_USB1_CHRG_DETECT_SET, + ANADIG_USB1_CHRG_DETECT_EN_B | + ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B); + + return chgr_type; +} + +/* + * It must be called after DP is pulled up, which is used to + * differentiate DCP and CDP. + */ +static enum usb_charger_type mxs_charger_secondary_detection(struct mxs_phy *x) +{ + struct regmap *regmap = x->regmap_anatop; + int val; + + msleep(80); + + regmap_read(regmap, ANADIG_USB1_CHRG_DET_STAT, &val); + if (val & ANADIG_USB1_CHRG_DET_STAT_DM_STATE) { + dev_dbg(x->phy.dev, "It is a dedicate charging port\n"); + return DCP_TYPE; + } else { + dev_dbg(x->phy.dev, "It is a charging downstream port\n"); + return CDP_TYPE; + } +} + +static enum usb_charger_type mxs_phy_charger_detect(struct usb_phy *phy) +{ + struct mxs_phy *mxs_phy = to_mxs_phy(phy); + struct regmap *regmap = mxs_phy->regmap_anatop; + void __iomem *base = phy->io_priv; + enum usb_charger_type chgr_type = UNKNOWN_TYPE; + + if (!regmap) + return UNKNOWN_TYPE; + + if (mxs_charger_data_contact_detect(mxs_phy)) + return chgr_type; + + chgr_type = mxs_charger_primary_detection(mxs_phy); + + if (chgr_type != SDP_TYPE) { + /* Pull up DP via test */ + writel_relaxed(BM_USBPHY_DEBUG_CLKGATE, + base + HW_USBPHY_DEBUG_CLR); + regmap_write(regmap, ANADIG_USB1_LOOPBACK_SET, + ANADIG_USB1_LOOPBACK_UTMI_TESTSTART); + + chgr_type = mxs_charger_secondary_detection(mxs_phy); + + /* Stop the test */ + regmap_write(regmap, ANADIG_USB1_LOOPBACK_CLR, + ANADIG_USB1_LOOPBACK_UTMI_TESTSTART); + writel_relaxed(BM_USBPHY_DEBUG_CLKGATE, + base + HW_USBPHY_DEBUG_SET); + } + + return chgr_type; +} + +static int mxs_phy_probe(struct platform_device *pdev) +{ + void __iomem *base; + struct clk *clk; + struct mxs_phy *mxs_phy; + int ret; + struct device_node *np = pdev->dev.of_node; + u32 val; + + base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(base)) + return PTR_ERR(base); + + clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(clk)) { + dev_err(&pdev->dev, + "can't get the clock, err=%ld", PTR_ERR(clk)); + return PTR_ERR(clk); + } + + mxs_phy = devm_kzalloc(&pdev->dev, sizeof(*mxs_phy), GFP_KERNEL); + if (!mxs_phy) + return -ENOMEM; + + /* Some SoCs don't have anatop registers */ + if (of_get_property(np, "fsl,anatop", NULL)) { + mxs_phy->regmap_anatop = syscon_regmap_lookup_by_phandle + (np, "fsl,anatop"); + if (IS_ERR(mxs_phy->regmap_anatop)) { + dev_dbg(&pdev->dev, + "failed to find regmap for anatop\n"); + return PTR_ERR(mxs_phy->regmap_anatop); + } + } + + /* Precompute which bits of the TX register are to be updated, if any */ + if (!of_property_read_u32(np, "fsl,tx-cal-45-dn-ohms", &val) && + val >= MXS_PHY_TX_CAL45_MIN && val <= MXS_PHY_TX_CAL45_MAX) { + /* Scale to a 4-bit value */ + val = (MXS_PHY_TX_CAL45_MAX - val) * 0xF + / (MXS_PHY_TX_CAL45_MAX - MXS_PHY_TX_CAL45_MIN); + mxs_phy->tx_reg_mask |= GM_USBPHY_TX_TXCAL45DN(~0); + mxs_phy->tx_reg_set |= GM_USBPHY_TX_TXCAL45DN(val); + } + + if (!of_property_read_u32(np, "fsl,tx-cal-45-dp-ohms", &val) && + val >= MXS_PHY_TX_CAL45_MIN && val <= MXS_PHY_TX_CAL45_MAX) { + /* Scale to a 4-bit value. */ + val = (MXS_PHY_TX_CAL45_MAX - val) * 0xF + / (MXS_PHY_TX_CAL45_MAX - MXS_PHY_TX_CAL45_MIN); + mxs_phy->tx_reg_mask |= GM_USBPHY_TX_TXCAL45DP(~0); + mxs_phy->tx_reg_set |= GM_USBPHY_TX_TXCAL45DP(val); + } + + if (!of_property_read_u32(np, "fsl,tx-d-cal", &val) && + val >= MXS_PHY_TX_D_CAL_MIN && val <= MXS_PHY_TX_D_CAL_MAX) { + /* Scale to a 4-bit value. Round up the values and heavily + * weight the rounding by adding 2/3 of the denominator. + */ + val = ((MXS_PHY_TX_D_CAL_MAX - val) * 0xF + + (MXS_PHY_TX_D_CAL_MAX - MXS_PHY_TX_D_CAL_MIN) * 2/3) + / (MXS_PHY_TX_D_CAL_MAX - MXS_PHY_TX_D_CAL_MIN); + mxs_phy->tx_reg_mask |= GM_USBPHY_TX_D_CAL(~0); + mxs_phy->tx_reg_set |= GM_USBPHY_TX_D_CAL(val); + } + + ret = of_alias_get_id(np, "usbphy"); + if (ret < 0) + dev_dbg(&pdev->dev, "failed to get alias id, errno %d\n", ret); + mxs_phy->port_id = ret; + + mxs_phy->phy.io_priv = base; + mxs_phy->phy.dev = &pdev->dev; + mxs_phy->phy.label = DRIVER_NAME; + mxs_phy->phy.init = mxs_phy_init; + mxs_phy->phy.shutdown = mxs_phy_shutdown; + mxs_phy->phy.set_suspend = mxs_phy_suspend; + mxs_phy->phy.notify_connect = mxs_phy_on_connect; + mxs_phy->phy.notify_disconnect = mxs_phy_on_disconnect; + mxs_phy->phy.type = USB_PHY_TYPE_USB2; + mxs_phy->phy.set_wakeup = mxs_phy_set_wakeup; + mxs_phy->phy.charger_detect = mxs_phy_charger_detect; + + mxs_phy->clk = clk; + mxs_phy->data = of_device_get_match_data(&pdev->dev); + + platform_set_drvdata(pdev, mxs_phy); + + device_set_wakeup_capable(&pdev->dev, true); + + return usb_add_phy_dev(&mxs_phy->phy); +} + +static int mxs_phy_remove(struct platform_device *pdev) +{ + struct mxs_phy *mxs_phy = platform_get_drvdata(pdev); + + usb_remove_phy(&mxs_phy->phy); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static void mxs_phy_enable_ldo_in_suspend(struct mxs_phy *mxs_phy, bool on) +{ + unsigned int reg = on ? ANADIG_ANA_MISC0_SET : ANADIG_ANA_MISC0_CLR; + + /* If the SoCs don't have anatop, quit */ + if (!mxs_phy->regmap_anatop) + return; + + if (is_imx6q_phy(mxs_phy)) + regmap_write(mxs_phy->regmap_anatop, reg, + BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG); + else if (is_imx6sl_phy(mxs_phy)) + regmap_write(mxs_phy->regmap_anatop, + reg, BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG_SL); +} + +static int mxs_phy_system_suspend(struct device *dev) +{ + struct mxs_phy *mxs_phy = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + mxs_phy_enable_ldo_in_suspend(mxs_phy, true); + + return 0; +} + +static int mxs_phy_system_resume(struct device *dev) +{ + struct mxs_phy *mxs_phy = dev_get_drvdata(dev); + + if (device_may_wakeup(dev)) + mxs_phy_enable_ldo_in_suspend(mxs_phy, false); + + return 0; +} +#endif /* CONFIG_PM_SLEEP */ + +static SIMPLE_DEV_PM_OPS(mxs_phy_pm, mxs_phy_system_suspend, + mxs_phy_system_resume); + +static struct platform_driver mxs_phy_driver = { + .probe = mxs_phy_probe, + .remove = mxs_phy_remove, + .driver = { + .name = DRIVER_NAME, + .of_match_table = mxs_phy_dt_ids, + .pm = &mxs_phy_pm, + }, +}; + +static int __init mxs_phy_module_init(void) +{ + return platform_driver_register(&mxs_phy_driver); +} +postcore_initcall(mxs_phy_module_init); + +static void __exit mxs_phy_module_exit(void) +{ + platform_driver_unregister(&mxs_phy_driver); +} +module_exit(mxs_phy_module_exit); + +MODULE_ALIAS("platform:mxs-usb-phy"); +MODULE_AUTHOR("Marek Vasut <marex@denx.de>"); +MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>"); +MODULE_DESCRIPTION("Freescale MXS USB PHY driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/usb/phy/phy-omap-otg.c b/drivers/usb/phy/phy-omap-otg.c new file mode 100644 index 000000000..6e6ef8c0b --- /dev/null +++ b/drivers/usb/phy/phy-omap-otg.c @@ -0,0 +1,150 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * OMAP OTG controller driver + * + * Based on code from tahvo-usb.c and isp1301_omap.c drivers. + * + * Copyright (C) 2005-2006 Nokia Corporation + * Copyright (C) 2004 Texas Instruments + * Copyright (C) 2004 David Brownell + */ + +#include <linux/io.h> +#include <linux/err.h> +#include <linux/extcon.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/platform_data/usb-omap1.h> + +struct otg_device { + void __iomem *base; + bool id; + bool vbus; + struct extcon_dev *extcon; + struct notifier_block vbus_nb; + struct notifier_block id_nb; +}; + +#define OMAP_OTG_CTRL 0x0c +#define OMAP_OTG_ASESSVLD (1 << 20) +#define OMAP_OTG_BSESSEND (1 << 19) +#define OMAP_OTG_BSESSVLD (1 << 18) +#define OMAP_OTG_VBUSVLD (1 << 17) +#define OMAP_OTG_ID (1 << 16) +#define OMAP_OTG_XCEIV_OUTPUTS \ + (OMAP_OTG_ASESSVLD | OMAP_OTG_BSESSEND | OMAP_OTG_BSESSVLD | \ + OMAP_OTG_VBUSVLD | OMAP_OTG_ID) + +static void omap_otg_ctrl(struct otg_device *otg_dev, u32 outputs) +{ + u32 l; + + l = readl(otg_dev->base + OMAP_OTG_CTRL); + l &= ~OMAP_OTG_XCEIV_OUTPUTS; + l |= outputs; + writel(l, otg_dev->base + OMAP_OTG_CTRL); +} + +static void omap_otg_set_mode(struct otg_device *otg_dev) +{ + if (!otg_dev->id && otg_dev->vbus) + /* Set B-session valid. */ + omap_otg_ctrl(otg_dev, OMAP_OTG_ID | OMAP_OTG_BSESSVLD); + else if (otg_dev->vbus) + /* Set A-session valid. */ + omap_otg_ctrl(otg_dev, OMAP_OTG_ASESSVLD); + else if (!otg_dev->id) + /* Set B-session end to indicate no VBUS. */ + omap_otg_ctrl(otg_dev, OMAP_OTG_ID | OMAP_OTG_BSESSEND); +} + +static int omap_otg_id_notifier(struct notifier_block *nb, + unsigned long event, void *ptr) +{ + struct otg_device *otg_dev = container_of(nb, struct otg_device, id_nb); + + otg_dev->id = event; + omap_otg_set_mode(otg_dev); + + return NOTIFY_DONE; +} + +static int omap_otg_vbus_notifier(struct notifier_block *nb, + unsigned long event, void *ptr) +{ + struct otg_device *otg_dev = container_of(nb, struct otg_device, + vbus_nb); + + otg_dev->vbus = event; + omap_otg_set_mode(otg_dev); + + return NOTIFY_DONE; +} + +static int omap_otg_probe(struct platform_device *pdev) +{ + const struct omap_usb_config *config = pdev->dev.platform_data; + struct otg_device *otg_dev; + struct extcon_dev *extcon; + int ret; + u32 rev; + + if (!config || !config->extcon) + return -ENODEV; + + extcon = extcon_get_extcon_dev(config->extcon); + if (IS_ERR(extcon)) + return PTR_ERR(extcon); + + otg_dev = devm_kzalloc(&pdev->dev, sizeof(*otg_dev), GFP_KERNEL); + if (!otg_dev) + return -ENOMEM; + + otg_dev->base = devm_ioremap_resource(&pdev->dev, &pdev->resource[0]); + if (IS_ERR(otg_dev->base)) + return PTR_ERR(otg_dev->base); + + otg_dev->extcon = extcon; + otg_dev->id_nb.notifier_call = omap_otg_id_notifier; + otg_dev->vbus_nb.notifier_call = omap_otg_vbus_notifier; + + ret = devm_extcon_register_notifier(&pdev->dev, extcon, + EXTCON_USB_HOST, &otg_dev->id_nb); + if (ret) + return ret; + + ret = devm_extcon_register_notifier(&pdev->dev, extcon, + EXTCON_USB, &otg_dev->vbus_nb); + if (ret) { + return ret; + } + + otg_dev->id = extcon_get_state(extcon, EXTCON_USB_HOST); + otg_dev->vbus = extcon_get_state(extcon, EXTCON_USB); + omap_otg_set_mode(otg_dev); + + rev = readl(otg_dev->base); + + dev_info(&pdev->dev, + "OMAP USB OTG controller rev %d.%d (%s, id=%d, vbus=%d)\n", + (rev >> 4) & 0xf, rev & 0xf, config->extcon, otg_dev->id, + otg_dev->vbus); + + platform_set_drvdata(pdev, otg_dev); + + return 0; +} + +static struct platform_driver omap_otg_driver = { + .probe = omap_otg_probe, + .driver = { + .name = "omap_otg", + }, +}; +module_platform_driver(omap_otg_driver); + +MODULE_DESCRIPTION("OMAP USB OTG controller driver"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Aaro Koskinen <aaro.koskinen@iki.fi>"); diff --git a/drivers/usb/phy/phy-tahvo.c b/drivers/usb/phy/phy-tahvo.c new file mode 100644 index 000000000..da63d7e4d --- /dev/null +++ b/drivers/usb/phy/phy-tahvo.c @@ -0,0 +1,440 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Tahvo USB transceiver driver + * + * Copyright (C) 2005-2006 Nokia Corporation + * + * Parts copied from isp1301_omap.c. + * Copyright (C) 2004 Texas Instruments + * Copyright (C) 2004 David Brownell + * + * Original driver written by Juha Yrjölä, Tony Lindgren and Timo Teräs. + * Modified for Retu/Tahvo MFD by Aaro Koskinen. + */ + +#include <linux/io.h> +#include <linux/clk.h> +#include <linux/usb.h> +#include <linux/extcon-provider.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/usb/otg.h> +#include <linux/mfd/retu.h> +#include <linux/usb/gadget.h> +#include <linux/platform_device.h> + +#define DRIVER_NAME "tahvo-usb" + +#define TAHVO_REG_IDSR 0x02 +#define TAHVO_REG_USBR 0x06 + +#define USBR_SLAVE_CONTROL (1 << 8) +#define USBR_VPPVIO_SW (1 << 7) +#define USBR_SPEED (1 << 6) +#define USBR_REGOUT (1 << 5) +#define USBR_MASTER_SW2 (1 << 4) +#define USBR_MASTER_SW1 (1 << 3) +#define USBR_SLAVE_SW (1 << 2) +#define USBR_NSUSPEND (1 << 1) +#define USBR_SEMODE (1 << 0) + +#define TAHVO_MODE_HOST 0 +#define TAHVO_MODE_PERIPHERAL 1 + +struct tahvo_usb { + struct platform_device *pt_dev; + struct usb_phy phy; + int vbus_state; + struct mutex serialize; + struct clk *ick; + int irq; + int tahvo_mode; + struct extcon_dev *extcon; +}; + +static const unsigned int tahvo_cable[] = { + EXTCON_USB, + EXTCON_USB_HOST, + + EXTCON_NONE, +}; + +static ssize_t vbus_show(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct tahvo_usb *tu = dev_get_drvdata(device); + return sprintf(buf, "%s\n", tu->vbus_state ? "on" : "off"); +} +static DEVICE_ATTR_RO(vbus); + +static void check_vbus_state(struct tahvo_usb *tu) +{ + struct retu_dev *rdev = dev_get_drvdata(tu->pt_dev->dev.parent); + int reg, prev_state; + + reg = retu_read(rdev, TAHVO_REG_IDSR); + if (reg & TAHVO_STAT_VBUS) { + switch (tu->phy.otg->state) { + case OTG_STATE_B_IDLE: + /* Enable the gadget driver */ + if (tu->phy.otg->gadget) + usb_gadget_vbus_connect(tu->phy.otg->gadget); + tu->phy.otg->state = OTG_STATE_B_PERIPHERAL; + usb_phy_set_event(&tu->phy, USB_EVENT_ENUMERATED); + break; + case OTG_STATE_A_IDLE: + /* + * Session is now valid assuming the USB hub is driving + * Vbus. + */ + tu->phy.otg->state = OTG_STATE_A_HOST; + break; + default: + break; + } + dev_info(&tu->pt_dev->dev, "USB cable connected\n"); + } else { + switch (tu->phy.otg->state) { + case OTG_STATE_B_PERIPHERAL: + if (tu->phy.otg->gadget) + usb_gadget_vbus_disconnect(tu->phy.otg->gadget); + tu->phy.otg->state = OTG_STATE_B_IDLE; + usb_phy_set_event(&tu->phy, USB_EVENT_NONE); + break; + case OTG_STATE_A_HOST: + tu->phy.otg->state = OTG_STATE_A_IDLE; + break; + default: + break; + } + dev_info(&tu->pt_dev->dev, "USB cable disconnected\n"); + } + + prev_state = tu->vbus_state; + tu->vbus_state = reg & TAHVO_STAT_VBUS; + if (prev_state != tu->vbus_state) { + extcon_set_state_sync(tu->extcon, EXTCON_USB, tu->vbus_state); + sysfs_notify(&tu->pt_dev->dev.kobj, NULL, "vbus_state"); + } +} + +static void tahvo_usb_become_host(struct tahvo_usb *tu) +{ + struct retu_dev *rdev = dev_get_drvdata(tu->pt_dev->dev.parent); + + extcon_set_state_sync(tu->extcon, EXTCON_USB_HOST, true); + + /* Power up the transceiver in USB host mode */ + retu_write(rdev, TAHVO_REG_USBR, USBR_REGOUT | USBR_NSUSPEND | + USBR_MASTER_SW2 | USBR_MASTER_SW1); + tu->phy.otg->state = OTG_STATE_A_IDLE; + + check_vbus_state(tu); +} + +static void tahvo_usb_stop_host(struct tahvo_usb *tu) +{ + tu->phy.otg->state = OTG_STATE_A_IDLE; +} + +static void tahvo_usb_become_peripheral(struct tahvo_usb *tu) +{ + struct retu_dev *rdev = dev_get_drvdata(tu->pt_dev->dev.parent); + + extcon_set_state_sync(tu->extcon, EXTCON_USB_HOST, false); + + /* Power up transceiver and set it in USB peripheral mode */ + retu_write(rdev, TAHVO_REG_USBR, USBR_SLAVE_CONTROL | USBR_REGOUT | + USBR_NSUSPEND | USBR_SLAVE_SW); + tu->phy.otg->state = OTG_STATE_B_IDLE; + + check_vbus_state(tu); +} + +static void tahvo_usb_stop_peripheral(struct tahvo_usb *tu) +{ + if (tu->phy.otg->gadget) + usb_gadget_vbus_disconnect(tu->phy.otg->gadget); + tu->phy.otg->state = OTG_STATE_B_IDLE; +} + +static void tahvo_usb_power_off(struct tahvo_usb *tu) +{ + struct retu_dev *rdev = dev_get_drvdata(tu->pt_dev->dev.parent); + + /* Disable gadget controller if any */ + if (tu->phy.otg->gadget) + usb_gadget_vbus_disconnect(tu->phy.otg->gadget); + + /* Power off transceiver */ + retu_write(rdev, TAHVO_REG_USBR, 0); + tu->phy.otg->state = OTG_STATE_UNDEFINED; +} + +static int tahvo_usb_set_suspend(struct usb_phy *dev, int suspend) +{ + struct tahvo_usb *tu = container_of(dev, struct tahvo_usb, phy); + struct retu_dev *rdev = dev_get_drvdata(tu->pt_dev->dev.parent); + u16 w; + + dev_dbg(&tu->pt_dev->dev, "%s\n", __func__); + + w = retu_read(rdev, TAHVO_REG_USBR); + if (suspend) + w &= ~USBR_NSUSPEND; + else + w |= USBR_NSUSPEND; + retu_write(rdev, TAHVO_REG_USBR, w); + + return 0; +} + +static int tahvo_usb_set_host(struct usb_otg *otg, struct usb_bus *host) +{ + struct tahvo_usb *tu = container_of(otg->usb_phy, struct tahvo_usb, + phy); + + mutex_lock(&tu->serialize); + + if (host == NULL) { + if (tu->tahvo_mode == TAHVO_MODE_HOST) + tahvo_usb_power_off(tu); + otg->host = NULL; + mutex_unlock(&tu->serialize); + return 0; + } + + if (tu->tahvo_mode == TAHVO_MODE_HOST) { + otg->host = NULL; + tahvo_usb_become_host(tu); + } + + otg->host = host; + + mutex_unlock(&tu->serialize); + + return 0; +} + +static int tahvo_usb_set_peripheral(struct usb_otg *otg, + struct usb_gadget *gadget) +{ + struct tahvo_usb *tu = container_of(otg->usb_phy, struct tahvo_usb, + phy); + + mutex_lock(&tu->serialize); + + if (!gadget) { + if (tu->tahvo_mode == TAHVO_MODE_PERIPHERAL) + tahvo_usb_power_off(tu); + tu->phy.otg->gadget = NULL; + mutex_unlock(&tu->serialize); + return 0; + } + + tu->phy.otg->gadget = gadget; + if (tu->tahvo_mode == TAHVO_MODE_PERIPHERAL) + tahvo_usb_become_peripheral(tu); + + mutex_unlock(&tu->serialize); + + return 0; +} + +static irqreturn_t tahvo_usb_vbus_interrupt(int irq, void *_tu) +{ + struct tahvo_usb *tu = _tu; + + mutex_lock(&tu->serialize); + check_vbus_state(tu); + mutex_unlock(&tu->serialize); + + return IRQ_HANDLED; +} + +static ssize_t otg_mode_show(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct tahvo_usb *tu = dev_get_drvdata(device); + + switch (tu->tahvo_mode) { + case TAHVO_MODE_HOST: + return sprintf(buf, "host\n"); + case TAHVO_MODE_PERIPHERAL: + return sprintf(buf, "peripheral\n"); + } + + return -EINVAL; +} + +static ssize_t otg_mode_store(struct device *device, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct tahvo_usb *tu = dev_get_drvdata(device); + int r; + + mutex_lock(&tu->serialize); + if (count >= 4 && strncmp(buf, "host", 4) == 0) { + if (tu->tahvo_mode == TAHVO_MODE_PERIPHERAL) + tahvo_usb_stop_peripheral(tu); + tu->tahvo_mode = TAHVO_MODE_HOST; + if (tu->phy.otg->host) { + dev_info(device, "HOST mode: host controller present\n"); + tahvo_usb_become_host(tu); + } else { + dev_info(device, "HOST mode: no host controller, powering off\n"); + tahvo_usb_power_off(tu); + } + r = strlen(buf); + } else if (count >= 10 && strncmp(buf, "peripheral", 10) == 0) { + if (tu->tahvo_mode == TAHVO_MODE_HOST) + tahvo_usb_stop_host(tu); + tu->tahvo_mode = TAHVO_MODE_PERIPHERAL; + if (tu->phy.otg->gadget) { + dev_info(device, "PERIPHERAL mode: gadget driver present\n"); + tahvo_usb_become_peripheral(tu); + } else { + dev_info(device, "PERIPHERAL mode: no gadget driver, powering off\n"); + tahvo_usb_power_off(tu); + } + r = strlen(buf); + } else { + r = -EINVAL; + } + mutex_unlock(&tu->serialize); + + return r; +} +static DEVICE_ATTR_RW(otg_mode); + +static struct attribute *tahvo_attrs[] = { + &dev_attr_vbus.attr, + &dev_attr_otg_mode.attr, + NULL +}; +ATTRIBUTE_GROUPS(tahvo); + +static int tahvo_usb_probe(struct platform_device *pdev) +{ + struct retu_dev *rdev = dev_get_drvdata(pdev->dev.parent); + struct tahvo_usb *tu; + int ret; + + tu = devm_kzalloc(&pdev->dev, sizeof(*tu), GFP_KERNEL); + if (!tu) + return -ENOMEM; + + tu->phy.otg = devm_kzalloc(&pdev->dev, sizeof(*tu->phy.otg), + GFP_KERNEL); + if (!tu->phy.otg) + return -ENOMEM; + + tu->pt_dev = pdev; + + /* Default mode */ +#ifdef CONFIG_TAHVO_USB_HOST_BY_DEFAULT + tu->tahvo_mode = TAHVO_MODE_HOST; +#else + tu->tahvo_mode = TAHVO_MODE_PERIPHERAL; +#endif + + mutex_init(&tu->serialize); + + tu->ick = devm_clk_get(&pdev->dev, "usb_l4_ick"); + if (!IS_ERR(tu->ick)) + clk_enable(tu->ick); + + /* + * Set initial state, so that we generate kevents only on state changes. + */ + tu->vbus_state = retu_read(rdev, TAHVO_REG_IDSR) & TAHVO_STAT_VBUS; + + tu->extcon = devm_extcon_dev_allocate(&pdev->dev, tahvo_cable); + if (IS_ERR(tu->extcon)) { + dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); + ret = PTR_ERR(tu->extcon); + goto err_disable_clk; + } + + ret = devm_extcon_dev_register(&pdev->dev, tu->extcon); + if (ret) { + dev_err(&pdev->dev, "could not register extcon device: %d\n", + ret); + goto err_disable_clk; + } + + /* Set the initial cable state. */ + extcon_set_state_sync(tu->extcon, EXTCON_USB_HOST, + tu->tahvo_mode == TAHVO_MODE_HOST); + extcon_set_state_sync(tu->extcon, EXTCON_USB, tu->vbus_state); + + /* Create OTG interface */ + tahvo_usb_power_off(tu); + tu->phy.dev = &pdev->dev; + tu->phy.otg->state = OTG_STATE_UNDEFINED; + tu->phy.label = DRIVER_NAME; + tu->phy.set_suspend = tahvo_usb_set_suspend; + + tu->phy.otg->usb_phy = &tu->phy; + tu->phy.otg->set_host = tahvo_usb_set_host; + tu->phy.otg->set_peripheral = tahvo_usb_set_peripheral; + + ret = usb_add_phy(&tu->phy, USB_PHY_TYPE_USB2); + if (ret < 0) { + dev_err(&pdev->dev, "cannot register USB transceiver: %d\n", + ret); + goto err_disable_clk; + } + + dev_set_drvdata(&pdev->dev, tu); + + tu->irq = ret = platform_get_irq(pdev, 0); + if (ret < 0) + goto err_remove_phy; + ret = request_threaded_irq(tu->irq, NULL, tahvo_usb_vbus_interrupt, + IRQF_ONESHOT, + "tahvo-vbus", tu); + if (ret) { + dev_err(&pdev->dev, "could not register tahvo-vbus irq: %d\n", + ret); + goto err_remove_phy; + } + + return 0; + +err_remove_phy: + usb_remove_phy(&tu->phy); +err_disable_clk: + if (!IS_ERR(tu->ick)) + clk_disable(tu->ick); + + return ret; +} + +static int tahvo_usb_remove(struct platform_device *pdev) +{ + struct tahvo_usb *tu = platform_get_drvdata(pdev); + + free_irq(tu->irq, tu); + usb_remove_phy(&tu->phy); + if (!IS_ERR(tu->ick)) + clk_disable(tu->ick); + + return 0; +} + +static struct platform_driver tahvo_usb_driver = { + .probe = tahvo_usb_probe, + .remove = tahvo_usb_remove, + .driver = { + .name = "tahvo-usb", + .dev_groups = tahvo_groups, + }, +}; +module_platform_driver(tahvo_usb_driver); + +MODULE_DESCRIPTION("Tahvo USB transceiver driver"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Juha Yrjölä, Tony Lindgren, and Timo Teräs"); +MODULE_AUTHOR("Aaro Koskinen <aaro.koskinen@iki.fi>"); diff --git a/drivers/usb/phy/phy-tegra-usb.c b/drivers/usb/phy/phy-tegra-usb.c new file mode 100644 index 000000000..f0240107e --- /dev/null +++ b/drivers/usb/phy/phy-tegra-usb.c @@ -0,0 +1,1509 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2010 Google, Inc. + * Copyright (C) 2013 NVIDIA Corporation + * + * Author: + * Erik Gilling <konkers@google.com> + * Benoit Goby <benoit@android.com> + * Venu Byravarasu <vbyravarasu@nvidia.com> + */ + +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/export.h> +#include <linux/gpio/consumer.h> +#include <linux/iopoll.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/resource.h> +#include <linux/slab.h> +#include <linux/spinlock.h> + +#include <linux/regulator/consumer.h> + +#include <linux/usb/ehci_def.h> +#include <linux/usb/of.h> +#include <linux/usb/tegra_usb_phy.h> +#include <linux/usb/ulpi.h> + +#define ULPI_VIEWPORT 0x170 + +/* PORTSC PTS/PHCD bits, Tegra20 only */ +#define TEGRA_USB_PORTSC1 0x184 +#define TEGRA_USB_PORTSC1_PTS(x) (((x) & 0x3) << 30) +#define TEGRA_USB_PORTSC1_PHCD BIT(23) + +/* HOSTPC1 PTS/PHCD bits, Tegra30 and above */ +#define TEGRA_USB_HOSTPC1_DEVLC 0x1b4 +#define TEGRA_USB_HOSTPC1_DEVLC_PTS(x) (((x) & 0x7) << 29) +#define TEGRA_USB_HOSTPC1_DEVLC_PHCD BIT(22) + +/* Bits of PORTSC1, which will get cleared by writing 1 into them */ +#define TEGRA_PORTSC1_RWC_BITS (PORT_CSC | PORT_PEC | PORT_OCC) + +#define USB_SUSP_CTRL 0x400 +#define USB_WAKE_ON_RESUME_EN BIT(2) +#define USB_WAKE_ON_CNNT_EN_DEV BIT(3) +#define USB_WAKE_ON_DISCON_EN_DEV BIT(4) +#define USB_SUSP_CLR BIT(5) +#define USB_PHY_CLK_VALID BIT(7) +#define UTMIP_RESET BIT(11) +#define UHSIC_RESET BIT(11) +#define UTMIP_PHY_ENABLE BIT(12) +#define ULPI_PHY_ENABLE BIT(13) +#define USB_SUSP_SET BIT(14) +#define USB_WAKEUP_DEBOUNCE_COUNT(x) (((x) & 0x7) << 16) + +#define USB_PHY_VBUS_SENSORS 0x404 +#define B_SESS_VLD_WAKEUP_EN BIT(14) +#define A_SESS_VLD_WAKEUP_EN BIT(22) +#define A_VBUS_VLD_WAKEUP_EN BIT(30) + +#define USB_PHY_VBUS_WAKEUP_ID 0x408 +#define ID_INT_EN BIT(0) +#define ID_CHG_DET BIT(1) +#define VBUS_WAKEUP_INT_EN BIT(8) +#define VBUS_WAKEUP_CHG_DET BIT(9) +#define VBUS_WAKEUP_STS BIT(10) +#define VBUS_WAKEUP_WAKEUP_EN BIT(30) + +#define USB1_LEGACY_CTRL 0x410 +#define USB1_NO_LEGACY_MODE BIT(0) +#define USB1_VBUS_SENSE_CTL_MASK (3 << 1) +#define USB1_VBUS_SENSE_CTL_VBUS_WAKEUP (0 << 1) +#define USB1_VBUS_SENSE_CTL_AB_SESS_VLD_OR_VBUS_WAKEUP \ + (1 << 1) +#define USB1_VBUS_SENSE_CTL_AB_SESS_VLD (2 << 1) +#define USB1_VBUS_SENSE_CTL_A_SESS_VLD (3 << 1) + +#define ULPI_TIMING_CTRL_0 0x424 +#define ULPI_OUTPUT_PINMUX_BYP BIT(10) +#define ULPI_CLKOUT_PINMUX_BYP BIT(11) + +#define ULPI_TIMING_CTRL_1 0x428 +#define ULPI_DATA_TRIMMER_LOAD BIT(0) +#define ULPI_DATA_TRIMMER_SEL(x) (((x) & 0x7) << 1) +#define ULPI_STPDIRNXT_TRIMMER_LOAD BIT(16) +#define ULPI_STPDIRNXT_TRIMMER_SEL(x) (((x) & 0x7) << 17) +#define ULPI_DIR_TRIMMER_LOAD BIT(24) +#define ULPI_DIR_TRIMMER_SEL(x) (((x) & 0x7) << 25) + +#define UTMIP_PLL_CFG1 0x804 +#define UTMIP_XTAL_FREQ_COUNT(x) (((x) & 0xfff) << 0) +#define UTMIP_PLLU_ENABLE_DLY_COUNT(x) (((x) & 0x1f) << 27) + +#define UTMIP_XCVR_CFG0 0x808 +#define UTMIP_XCVR_SETUP(x) (((x) & 0xf) << 0) +#define UTMIP_XCVR_SETUP_MSB(x) ((((x) & 0x70) >> 4) << 22) +#define UTMIP_XCVR_LSRSLEW(x) (((x) & 0x3) << 8) +#define UTMIP_XCVR_LSFSLEW(x) (((x) & 0x3) << 10) +#define UTMIP_FORCE_PD_POWERDOWN BIT(14) +#define UTMIP_FORCE_PD2_POWERDOWN BIT(16) +#define UTMIP_FORCE_PDZI_POWERDOWN BIT(18) +#define UTMIP_XCVR_LSBIAS_SEL BIT(21) +#define UTMIP_XCVR_HSSLEW(x) (((x) & 0x3) << 4) +#define UTMIP_XCVR_HSSLEW_MSB(x) ((((x) & 0x1fc) >> 2) << 25) + +#define UTMIP_BIAS_CFG0 0x80c +#define UTMIP_OTGPD BIT(11) +#define UTMIP_BIASPD BIT(10) +#define UTMIP_HSSQUELCH_LEVEL(x) (((x) & 0x3) << 0) +#define UTMIP_HSDISCON_LEVEL(x) (((x) & 0x3) << 2) +#define UTMIP_HSDISCON_LEVEL_MSB(x) ((((x) & 0x4) >> 2) << 24) + +#define UTMIP_HSRX_CFG0 0x810 +#define UTMIP_ELASTIC_LIMIT(x) (((x) & 0x1f) << 10) +#define UTMIP_IDLE_WAIT(x) (((x) & 0x1f) << 15) + +#define UTMIP_HSRX_CFG1 0x814 +#define UTMIP_HS_SYNC_START_DLY(x) (((x) & 0x1f) << 1) + +#define UTMIP_TX_CFG0 0x820 +#define UTMIP_FS_PREABMLE_J BIT(19) +#define UTMIP_HS_DISCON_DISABLE BIT(8) + +#define UTMIP_MISC_CFG0 0x824 +#define UTMIP_DPDM_OBSERVE BIT(26) +#define UTMIP_DPDM_OBSERVE_SEL(x) (((x) & 0xf) << 27) +#define UTMIP_DPDM_OBSERVE_SEL_FS_J UTMIP_DPDM_OBSERVE_SEL(0xf) +#define UTMIP_DPDM_OBSERVE_SEL_FS_K UTMIP_DPDM_OBSERVE_SEL(0xe) +#define UTMIP_DPDM_OBSERVE_SEL_FS_SE1 UTMIP_DPDM_OBSERVE_SEL(0xd) +#define UTMIP_DPDM_OBSERVE_SEL_FS_SE0 UTMIP_DPDM_OBSERVE_SEL(0xc) +#define UTMIP_SUSPEND_EXIT_ON_EDGE BIT(22) + +#define UTMIP_MISC_CFG1 0x828 +#define UTMIP_PLL_ACTIVE_DLY_COUNT(x) (((x) & 0x1f) << 18) +#define UTMIP_PLLU_STABLE_COUNT(x) (((x) & 0xfff) << 6) + +#define UTMIP_DEBOUNCE_CFG0 0x82c +#define UTMIP_BIAS_DEBOUNCE_A(x) (((x) & 0xffff) << 0) + +#define UTMIP_BAT_CHRG_CFG0 0x830 +#define UTMIP_PD_CHRG BIT(0) + +#define UTMIP_SPARE_CFG0 0x834 +#define FUSE_SETUP_SEL BIT(3) + +#define UTMIP_XCVR_CFG1 0x838 +#define UTMIP_FORCE_PDDISC_POWERDOWN BIT(0) +#define UTMIP_FORCE_PDCHRP_POWERDOWN BIT(2) +#define UTMIP_FORCE_PDDR_POWERDOWN BIT(4) +#define UTMIP_XCVR_TERM_RANGE_ADJ(x) (((x) & 0xf) << 18) + +#define UTMIP_BIAS_CFG1 0x83c +#define UTMIP_BIAS_PDTRK_COUNT(x) (((x) & 0x1f) << 3) + +/* For Tegra30 and above only, the address is different in Tegra20 */ +#define USB_USBMODE 0x1f8 +#define USB_USBMODE_MASK (3 << 0) +#define USB_USBMODE_HOST (3 << 0) +#define USB_USBMODE_DEVICE (2 << 0) + +#define PMC_USB_AO 0xf0 +#define VBUS_WAKEUP_PD_P0 BIT(2) +#define ID_PD_P0 BIT(3) + +static DEFINE_SPINLOCK(utmip_pad_lock); +static unsigned int utmip_pad_count; + +struct tegra_xtal_freq { + unsigned int freq; + u8 enable_delay; + u8 stable_count; + u8 active_delay; + u8 xtal_freq_count; + u16 debounce; +}; + +static const struct tegra_xtal_freq tegra_freq_table[] = { + { + .freq = 12000000, + .enable_delay = 0x02, + .stable_count = 0x2F, + .active_delay = 0x04, + .xtal_freq_count = 0x76, + .debounce = 0x7530, + }, + { + .freq = 13000000, + .enable_delay = 0x02, + .stable_count = 0x33, + .active_delay = 0x05, + .xtal_freq_count = 0x7F, + .debounce = 0x7EF4, + }, + { + .freq = 19200000, + .enable_delay = 0x03, + .stable_count = 0x4B, + .active_delay = 0x06, + .xtal_freq_count = 0xBB, + .debounce = 0xBB80, + }, + { + .freq = 26000000, + .enable_delay = 0x04, + .stable_count = 0x66, + .active_delay = 0x09, + .xtal_freq_count = 0xFE, + .debounce = 0xFDE8, + }, +}; + +static inline struct tegra_usb_phy *to_tegra_usb_phy(struct usb_phy *u_phy) +{ + return container_of(u_phy, struct tegra_usb_phy, u_phy); +} + +static void set_pts(struct tegra_usb_phy *phy, u8 pts_val) +{ + void __iomem *base = phy->regs; + u32 val; + + if (phy->soc_config->has_hostpc) { + val = readl_relaxed(base + TEGRA_USB_HOSTPC1_DEVLC); + val &= ~TEGRA_USB_HOSTPC1_DEVLC_PTS(~0); + val |= TEGRA_USB_HOSTPC1_DEVLC_PTS(pts_val); + writel_relaxed(val, base + TEGRA_USB_HOSTPC1_DEVLC); + } else { + val = readl_relaxed(base + TEGRA_USB_PORTSC1); + val &= ~TEGRA_PORTSC1_RWC_BITS; + val &= ~TEGRA_USB_PORTSC1_PTS(~0); + val |= TEGRA_USB_PORTSC1_PTS(pts_val); + writel_relaxed(val, base + TEGRA_USB_PORTSC1); + } +} + +static void set_phcd(struct tegra_usb_phy *phy, bool enable) +{ + void __iomem *base = phy->regs; + u32 val; + + if (phy->soc_config->has_hostpc) { + val = readl_relaxed(base + TEGRA_USB_HOSTPC1_DEVLC); + if (enable) + val |= TEGRA_USB_HOSTPC1_DEVLC_PHCD; + else + val &= ~TEGRA_USB_HOSTPC1_DEVLC_PHCD; + writel_relaxed(val, base + TEGRA_USB_HOSTPC1_DEVLC); + } else { + val = readl_relaxed(base + TEGRA_USB_PORTSC1) & ~PORT_RWC_BITS; + if (enable) + val |= TEGRA_USB_PORTSC1_PHCD; + else + val &= ~TEGRA_USB_PORTSC1_PHCD; + writel_relaxed(val, base + TEGRA_USB_PORTSC1); + } +} + +static int utmip_pad_open(struct tegra_usb_phy *phy) +{ + int ret; + + ret = clk_prepare_enable(phy->pad_clk); + if (ret) { + dev_err(phy->u_phy.dev, + "Failed to enable UTMI-pads clock: %d\n", ret); + return ret; + } + + spin_lock(&utmip_pad_lock); + + ret = reset_control_deassert(phy->pad_rst); + if (ret) { + dev_err(phy->u_phy.dev, + "Failed to initialize UTMI-pads reset: %d\n", ret); + goto unlock; + } + + ret = reset_control_assert(phy->pad_rst); + if (ret) { + dev_err(phy->u_phy.dev, + "Failed to assert UTMI-pads reset: %d\n", ret); + goto unlock; + } + + udelay(1); + + ret = reset_control_deassert(phy->pad_rst); + if (ret) + dev_err(phy->u_phy.dev, + "Failed to deassert UTMI-pads reset: %d\n", ret); +unlock: + spin_unlock(&utmip_pad_lock); + + clk_disable_unprepare(phy->pad_clk); + + return ret; +} + +static int utmip_pad_close(struct tegra_usb_phy *phy) +{ + int ret; + + ret = clk_prepare_enable(phy->pad_clk); + if (ret) { + dev_err(phy->u_phy.dev, + "Failed to enable UTMI-pads clock: %d\n", ret); + return ret; + } + + ret = reset_control_assert(phy->pad_rst); + if (ret) + dev_err(phy->u_phy.dev, + "Failed to assert UTMI-pads reset: %d\n", ret); + + udelay(1); + + clk_disable_unprepare(phy->pad_clk); + + return ret; +} + +static int utmip_pad_power_on(struct tegra_usb_phy *phy) +{ + struct tegra_utmip_config *config = phy->config; + void __iomem *base = phy->pad_regs; + u32 val; + int err; + + err = clk_prepare_enable(phy->pad_clk); + if (err) + return err; + + spin_lock(&utmip_pad_lock); + + if (utmip_pad_count++ == 0) { + val = readl_relaxed(base + UTMIP_BIAS_CFG0); + val &= ~(UTMIP_OTGPD | UTMIP_BIASPD); + + if (phy->soc_config->requires_extra_tuning_parameters) { + val &= ~(UTMIP_HSSQUELCH_LEVEL(~0) | + UTMIP_HSDISCON_LEVEL(~0) | + UTMIP_HSDISCON_LEVEL_MSB(~0)); + + val |= UTMIP_HSSQUELCH_LEVEL(config->hssquelch_level); + val |= UTMIP_HSDISCON_LEVEL(config->hsdiscon_level); + val |= UTMIP_HSDISCON_LEVEL_MSB(config->hsdiscon_level); + } + writel_relaxed(val, base + UTMIP_BIAS_CFG0); + } + + if (phy->pad_wakeup) { + phy->pad_wakeup = false; + utmip_pad_count--; + } + + spin_unlock(&utmip_pad_lock); + + clk_disable_unprepare(phy->pad_clk); + + return 0; +} + +static int utmip_pad_power_off(struct tegra_usb_phy *phy) +{ + void __iomem *base = phy->pad_regs; + u32 val; + int ret; + + ret = clk_prepare_enable(phy->pad_clk); + if (ret) + return ret; + + spin_lock(&utmip_pad_lock); + + if (!utmip_pad_count) { + dev_err(phy->u_phy.dev, "UTMIP pad already powered off\n"); + ret = -EINVAL; + goto ulock; + } + + /* + * In accordance to TRM, OTG and Bias pad circuits could be turned off + * to save power if wake is enabled, but the VBUS-change detection + * method is board-specific and these circuits may need to be enabled + * to generate wakeup event, hence we will just keep them both enabled. + */ + if (phy->wakeup_enabled) { + phy->pad_wakeup = true; + utmip_pad_count++; + } + + if (--utmip_pad_count == 0) { + val = readl_relaxed(base + UTMIP_BIAS_CFG0); + val |= UTMIP_OTGPD | UTMIP_BIASPD; + writel_relaxed(val, base + UTMIP_BIAS_CFG0); + } +ulock: + spin_unlock(&utmip_pad_lock); + + clk_disable_unprepare(phy->pad_clk); + + return ret; +} + +static int utmi_wait_register(void __iomem *reg, u32 mask, u32 result) +{ + u32 tmp; + + return readl_relaxed_poll_timeout(reg, tmp, (tmp & mask) == result, + 2000, 6000); +} + +static void utmi_phy_clk_disable(struct tegra_usb_phy *phy) +{ + void __iomem *base = phy->regs; + u32 val; + + /* + * The USB driver may have already initiated the phy clock + * disable so wait to see if the clock turns off and if not + * then proceed with gating the clock. + */ + if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, 0) == 0) + return; + + if (phy->is_legacy_phy) { + val = readl_relaxed(base + USB_SUSP_CTRL); + val |= USB_SUSP_SET; + writel_relaxed(val, base + USB_SUSP_CTRL); + + usleep_range(10, 100); + + val = readl_relaxed(base + USB_SUSP_CTRL); + val &= ~USB_SUSP_SET; + writel_relaxed(val, base + USB_SUSP_CTRL); + } else { + set_phcd(phy, true); + } + + if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, 0)) + dev_err(phy->u_phy.dev, + "Timeout waiting for PHY to stabilize on disable\n"); +} + +static void utmi_phy_clk_enable(struct tegra_usb_phy *phy) +{ + void __iomem *base = phy->regs; + u32 val; + + /* + * The USB driver may have already initiated the phy clock + * enable so wait to see if the clock turns on and if not + * then proceed with ungating the clock. + */ + if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, + USB_PHY_CLK_VALID) == 0) + return; + + if (phy->is_legacy_phy) { + val = readl_relaxed(base + USB_SUSP_CTRL); + val |= USB_SUSP_CLR; + writel_relaxed(val, base + USB_SUSP_CTRL); + + usleep_range(10, 100); + + val = readl_relaxed(base + USB_SUSP_CTRL); + val &= ~USB_SUSP_CLR; + writel_relaxed(val, base + USB_SUSP_CTRL); + } else { + set_phcd(phy, false); + } + + if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, + USB_PHY_CLK_VALID)) + dev_err(phy->u_phy.dev, + "Timeout waiting for PHY to stabilize on enable\n"); +} + +static int utmi_phy_power_on(struct tegra_usb_phy *phy) +{ + struct tegra_utmip_config *config = phy->config; + void __iomem *base = phy->regs; + u32 val; + int err; + + val = readl_relaxed(base + USB_SUSP_CTRL); + val |= UTMIP_RESET; + writel_relaxed(val, base + USB_SUSP_CTRL); + + if (phy->is_legacy_phy) { + val = readl_relaxed(base + USB1_LEGACY_CTRL); + val |= USB1_NO_LEGACY_MODE; + writel_relaxed(val, base + USB1_LEGACY_CTRL); + } + + val = readl_relaxed(base + UTMIP_TX_CFG0); + val |= UTMIP_FS_PREABMLE_J; + writel_relaxed(val, base + UTMIP_TX_CFG0); + + val = readl_relaxed(base + UTMIP_HSRX_CFG0); + val &= ~(UTMIP_IDLE_WAIT(~0) | UTMIP_ELASTIC_LIMIT(~0)); + val |= UTMIP_IDLE_WAIT(config->idle_wait_delay); + val |= UTMIP_ELASTIC_LIMIT(config->elastic_limit); + writel_relaxed(val, base + UTMIP_HSRX_CFG0); + + val = readl_relaxed(base + UTMIP_HSRX_CFG1); + val &= ~UTMIP_HS_SYNC_START_DLY(~0); + val |= UTMIP_HS_SYNC_START_DLY(config->hssync_start_delay); + writel_relaxed(val, base + UTMIP_HSRX_CFG1); + + val = readl_relaxed(base + UTMIP_DEBOUNCE_CFG0); + val &= ~UTMIP_BIAS_DEBOUNCE_A(~0); + val |= UTMIP_BIAS_DEBOUNCE_A(phy->freq->debounce); + writel_relaxed(val, base + UTMIP_DEBOUNCE_CFG0); + + val = readl_relaxed(base + UTMIP_MISC_CFG0); + val &= ~UTMIP_SUSPEND_EXIT_ON_EDGE; + writel_relaxed(val, base + UTMIP_MISC_CFG0); + + if (!phy->soc_config->utmi_pll_config_in_car_module) { + val = readl_relaxed(base + UTMIP_MISC_CFG1); + val &= ~(UTMIP_PLL_ACTIVE_DLY_COUNT(~0) | + UTMIP_PLLU_STABLE_COUNT(~0)); + val |= UTMIP_PLL_ACTIVE_DLY_COUNT(phy->freq->active_delay) | + UTMIP_PLLU_STABLE_COUNT(phy->freq->stable_count); + writel_relaxed(val, base + UTMIP_MISC_CFG1); + + val = readl_relaxed(base + UTMIP_PLL_CFG1); + val &= ~(UTMIP_XTAL_FREQ_COUNT(~0) | + UTMIP_PLLU_ENABLE_DLY_COUNT(~0)); + val |= UTMIP_XTAL_FREQ_COUNT(phy->freq->xtal_freq_count) | + UTMIP_PLLU_ENABLE_DLY_COUNT(phy->freq->enable_delay); + writel_relaxed(val, base + UTMIP_PLL_CFG1); + } + + val = readl_relaxed(base + USB_SUSP_CTRL); + val &= ~USB_WAKE_ON_RESUME_EN; + writel_relaxed(val, base + USB_SUSP_CTRL); + + if (phy->mode != USB_DR_MODE_HOST) { + val = readl_relaxed(base + USB_SUSP_CTRL); + val &= ~(USB_WAKE_ON_CNNT_EN_DEV | USB_WAKE_ON_DISCON_EN_DEV); + writel_relaxed(val, base + USB_SUSP_CTRL); + + val = readl_relaxed(base + USB_PHY_VBUS_WAKEUP_ID); + val &= ~VBUS_WAKEUP_WAKEUP_EN; + val &= ~(ID_CHG_DET | VBUS_WAKEUP_CHG_DET); + writel_relaxed(val, base + USB_PHY_VBUS_WAKEUP_ID); + + val = readl_relaxed(base + USB_PHY_VBUS_SENSORS); + val &= ~(A_VBUS_VLD_WAKEUP_EN | A_SESS_VLD_WAKEUP_EN); + val &= ~(B_SESS_VLD_WAKEUP_EN); + writel_relaxed(val, base + USB_PHY_VBUS_SENSORS); + + val = readl_relaxed(base + UTMIP_BAT_CHRG_CFG0); + val &= ~UTMIP_PD_CHRG; + writel_relaxed(val, base + UTMIP_BAT_CHRG_CFG0); + } else { + val = readl_relaxed(base + UTMIP_BAT_CHRG_CFG0); + val |= UTMIP_PD_CHRG; + writel_relaxed(val, base + UTMIP_BAT_CHRG_CFG0); + } + + err = utmip_pad_power_on(phy); + if (err) + return err; + + val = readl_relaxed(base + UTMIP_XCVR_CFG0); + val &= ~(UTMIP_FORCE_PD_POWERDOWN | UTMIP_FORCE_PD2_POWERDOWN | + UTMIP_FORCE_PDZI_POWERDOWN | UTMIP_XCVR_LSBIAS_SEL | + UTMIP_XCVR_SETUP(~0) | UTMIP_XCVR_SETUP_MSB(~0) | + UTMIP_XCVR_LSFSLEW(~0) | UTMIP_XCVR_LSRSLEW(~0)); + + if (!config->xcvr_setup_use_fuses) { + val |= UTMIP_XCVR_SETUP(config->xcvr_setup); + val |= UTMIP_XCVR_SETUP_MSB(config->xcvr_setup); + } + val |= UTMIP_XCVR_LSFSLEW(config->xcvr_lsfslew); + val |= UTMIP_XCVR_LSRSLEW(config->xcvr_lsrslew); + + if (phy->soc_config->requires_extra_tuning_parameters) { + val &= ~(UTMIP_XCVR_HSSLEW(~0) | UTMIP_XCVR_HSSLEW_MSB(~0)); + val |= UTMIP_XCVR_HSSLEW(config->xcvr_hsslew); + val |= UTMIP_XCVR_HSSLEW_MSB(config->xcvr_hsslew); + } + writel_relaxed(val, base + UTMIP_XCVR_CFG0); + + val = readl_relaxed(base + UTMIP_XCVR_CFG1); + val &= ~(UTMIP_FORCE_PDDISC_POWERDOWN | UTMIP_FORCE_PDCHRP_POWERDOWN | + UTMIP_FORCE_PDDR_POWERDOWN | UTMIP_XCVR_TERM_RANGE_ADJ(~0)); + val |= UTMIP_XCVR_TERM_RANGE_ADJ(config->term_range_adj); + writel_relaxed(val, base + UTMIP_XCVR_CFG1); + + val = readl_relaxed(base + UTMIP_BIAS_CFG1); + val &= ~UTMIP_BIAS_PDTRK_COUNT(~0); + val |= UTMIP_BIAS_PDTRK_COUNT(0x5); + writel_relaxed(val, base + UTMIP_BIAS_CFG1); + + val = readl_relaxed(base + UTMIP_SPARE_CFG0); + if (config->xcvr_setup_use_fuses) + val |= FUSE_SETUP_SEL; + else + val &= ~FUSE_SETUP_SEL; + writel_relaxed(val, base + UTMIP_SPARE_CFG0); + + if (!phy->is_legacy_phy) { + val = readl_relaxed(base + USB_SUSP_CTRL); + val |= UTMIP_PHY_ENABLE; + writel_relaxed(val, base + USB_SUSP_CTRL); + } + + val = readl_relaxed(base + USB_SUSP_CTRL); + val &= ~UTMIP_RESET; + writel_relaxed(val, base + USB_SUSP_CTRL); + + if (phy->is_legacy_phy) { + val = readl_relaxed(base + USB1_LEGACY_CTRL); + val &= ~USB1_VBUS_SENSE_CTL_MASK; + val |= USB1_VBUS_SENSE_CTL_A_SESS_VLD; + writel_relaxed(val, base + USB1_LEGACY_CTRL); + + val = readl_relaxed(base + USB_SUSP_CTRL); + val &= ~USB_SUSP_SET; + writel_relaxed(val, base + USB_SUSP_CTRL); + } + + utmi_phy_clk_enable(phy); + + if (phy->soc_config->requires_usbmode_setup) { + val = readl_relaxed(base + USB_USBMODE); + val &= ~USB_USBMODE_MASK; + if (phy->mode == USB_DR_MODE_HOST) + val |= USB_USBMODE_HOST; + else + val |= USB_USBMODE_DEVICE; + writel_relaxed(val, base + USB_USBMODE); + } + + if (!phy->is_legacy_phy) + set_pts(phy, 0); + + return 0; +} + +static int utmi_phy_power_off(struct tegra_usb_phy *phy) +{ + void __iomem *base = phy->regs; + u32 val; + + /* + * Give hardware time to settle down after VBUS disconnection, + * otherwise PHY will immediately wake up from suspend. + */ + if (phy->wakeup_enabled && phy->mode != USB_DR_MODE_HOST) + readl_relaxed_poll_timeout(base + USB_PHY_VBUS_WAKEUP_ID, + val, !(val & VBUS_WAKEUP_STS), + 5000, 100000); + + utmi_phy_clk_disable(phy); + + /* PHY won't resume if reset is asserted */ + if (!phy->wakeup_enabled) { + val = readl_relaxed(base + USB_SUSP_CTRL); + val |= UTMIP_RESET; + writel_relaxed(val, base + USB_SUSP_CTRL); + } + + val = readl_relaxed(base + UTMIP_BAT_CHRG_CFG0); + val |= UTMIP_PD_CHRG; + writel_relaxed(val, base + UTMIP_BAT_CHRG_CFG0); + + if (!phy->wakeup_enabled) { + val = readl_relaxed(base + UTMIP_XCVR_CFG0); + val |= UTMIP_FORCE_PD_POWERDOWN | UTMIP_FORCE_PD2_POWERDOWN | + UTMIP_FORCE_PDZI_POWERDOWN; + writel_relaxed(val, base + UTMIP_XCVR_CFG0); + } + + val = readl_relaxed(base + UTMIP_XCVR_CFG1); + val |= UTMIP_FORCE_PDDISC_POWERDOWN | UTMIP_FORCE_PDCHRP_POWERDOWN | + UTMIP_FORCE_PDDR_POWERDOWN; + writel_relaxed(val, base + UTMIP_XCVR_CFG1); + + if (phy->wakeup_enabled) { + val = readl_relaxed(base + USB_SUSP_CTRL); + val &= ~USB_WAKEUP_DEBOUNCE_COUNT(~0); + val |= USB_WAKEUP_DEBOUNCE_COUNT(5); + val |= USB_WAKE_ON_RESUME_EN; + writel_relaxed(val, base + USB_SUSP_CTRL); + + /* + * Ask VBUS sensor to generate wake event once cable is + * connected. + */ + if (phy->mode != USB_DR_MODE_HOST) { + val = readl_relaxed(base + USB_PHY_VBUS_WAKEUP_ID); + val |= VBUS_WAKEUP_WAKEUP_EN; + val &= ~(ID_CHG_DET | VBUS_WAKEUP_CHG_DET); + writel_relaxed(val, base + USB_PHY_VBUS_WAKEUP_ID); + + val = readl_relaxed(base + USB_PHY_VBUS_SENSORS); + val |= A_VBUS_VLD_WAKEUP_EN; + writel_relaxed(val, base + USB_PHY_VBUS_SENSORS); + } + } + + return utmip_pad_power_off(phy); +} + +static void utmi_phy_preresume(struct tegra_usb_phy *phy) +{ + void __iomem *base = phy->regs; + u32 val; + + val = readl_relaxed(base + UTMIP_TX_CFG0); + val |= UTMIP_HS_DISCON_DISABLE; + writel_relaxed(val, base + UTMIP_TX_CFG0); +} + +static void utmi_phy_postresume(struct tegra_usb_phy *phy) +{ + void __iomem *base = phy->regs; + u32 val; + + val = readl_relaxed(base + UTMIP_TX_CFG0); + val &= ~UTMIP_HS_DISCON_DISABLE; + writel_relaxed(val, base + UTMIP_TX_CFG0); +} + +static void utmi_phy_restore_start(struct tegra_usb_phy *phy, + enum tegra_usb_phy_port_speed port_speed) +{ + void __iomem *base = phy->regs; + u32 val; + + val = readl_relaxed(base + UTMIP_MISC_CFG0); + val &= ~UTMIP_DPDM_OBSERVE_SEL(~0); + if (port_speed == TEGRA_USB_PHY_PORT_SPEED_LOW) + val |= UTMIP_DPDM_OBSERVE_SEL_FS_K; + else + val |= UTMIP_DPDM_OBSERVE_SEL_FS_J; + writel_relaxed(val, base + UTMIP_MISC_CFG0); + usleep_range(1, 10); + + val = readl_relaxed(base + UTMIP_MISC_CFG0); + val |= UTMIP_DPDM_OBSERVE; + writel_relaxed(val, base + UTMIP_MISC_CFG0); + usleep_range(10, 100); +} + +static void utmi_phy_restore_end(struct tegra_usb_phy *phy) +{ + void __iomem *base = phy->regs; + u32 val; + + val = readl_relaxed(base + UTMIP_MISC_CFG0); + val &= ~UTMIP_DPDM_OBSERVE; + writel_relaxed(val, base + UTMIP_MISC_CFG0); + usleep_range(10, 100); +} + +static int ulpi_phy_power_on(struct tegra_usb_phy *phy) +{ + void __iomem *base = phy->regs; + u32 val; + int err; + + gpiod_set_value_cansleep(phy->reset_gpio, 1); + + err = clk_prepare_enable(phy->clk); + if (err) + return err; + + usleep_range(5000, 6000); + + gpiod_set_value_cansleep(phy->reset_gpio, 0); + + usleep_range(1000, 2000); + + val = readl_relaxed(base + USB_SUSP_CTRL); + val |= UHSIC_RESET; + writel_relaxed(val, base + USB_SUSP_CTRL); + + val = readl_relaxed(base + ULPI_TIMING_CTRL_0); + val |= ULPI_OUTPUT_PINMUX_BYP | ULPI_CLKOUT_PINMUX_BYP; + writel_relaxed(val, base + ULPI_TIMING_CTRL_0); + + val = readl_relaxed(base + USB_SUSP_CTRL); + val |= ULPI_PHY_ENABLE; + writel_relaxed(val, base + USB_SUSP_CTRL); + + val = 0; + writel_relaxed(val, base + ULPI_TIMING_CTRL_1); + + val |= ULPI_DATA_TRIMMER_SEL(4); + val |= ULPI_STPDIRNXT_TRIMMER_SEL(4); + val |= ULPI_DIR_TRIMMER_SEL(4); + writel_relaxed(val, base + ULPI_TIMING_CTRL_1); + usleep_range(10, 100); + + val |= ULPI_DATA_TRIMMER_LOAD; + val |= ULPI_STPDIRNXT_TRIMMER_LOAD; + val |= ULPI_DIR_TRIMMER_LOAD; + writel_relaxed(val, base + ULPI_TIMING_CTRL_1); + + /* Fix VbusInvalid due to floating VBUS */ + err = usb_phy_io_write(phy->ulpi, 0x40, 0x08); + if (err) { + dev_err(phy->u_phy.dev, "ULPI write failed: %d\n", err); + goto disable_clk; + } + + err = usb_phy_io_write(phy->ulpi, 0x80, 0x0B); + if (err) { + dev_err(phy->u_phy.dev, "ULPI write failed: %d\n", err); + goto disable_clk; + } + + val = readl_relaxed(base + USB_SUSP_CTRL); + val |= USB_SUSP_CLR; + writel_relaxed(val, base + USB_SUSP_CTRL); + usleep_range(100, 1000); + + val = readl_relaxed(base + USB_SUSP_CTRL); + val &= ~USB_SUSP_CLR; + writel_relaxed(val, base + USB_SUSP_CTRL); + + return 0; + +disable_clk: + clk_disable_unprepare(phy->clk); + + return err; +} + +static int ulpi_phy_power_off(struct tegra_usb_phy *phy) +{ + gpiod_set_value_cansleep(phy->reset_gpio, 1); + usleep_range(5000, 6000); + clk_disable_unprepare(phy->clk); + + /* + * Wakeup currently unimplemented for ULPI, thus PHY needs to be + * force-resumed. + */ + if (WARN_ON_ONCE(phy->wakeup_enabled)) { + ulpi_phy_power_on(phy); + return -EOPNOTSUPP; + } + + return 0; +} + +static int tegra_usb_phy_power_on(struct tegra_usb_phy *phy) +{ + int err; + + if (phy->powered_on) + return 0; + + if (phy->is_ulpi_phy) + err = ulpi_phy_power_on(phy); + else + err = utmi_phy_power_on(phy); + if (err) + return err; + + phy->powered_on = true; + + /* Let PHY settle down */ + usleep_range(2000, 2500); + + return 0; +} + +static int tegra_usb_phy_power_off(struct tegra_usb_phy *phy) +{ + int err; + + if (!phy->powered_on) + return 0; + + if (phy->is_ulpi_phy) + err = ulpi_phy_power_off(phy); + else + err = utmi_phy_power_off(phy); + if (err) + return err; + + phy->powered_on = false; + + return 0; +} + +static void tegra_usb_phy_shutdown(struct usb_phy *u_phy) +{ + struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy); + + if (WARN_ON(!phy->freq)) + return; + + usb_phy_set_wakeup(u_phy, false); + tegra_usb_phy_power_off(phy); + + if (!phy->is_ulpi_phy) + utmip_pad_close(phy); + + regulator_disable(phy->vbus); + clk_disable_unprepare(phy->pll_u); + + phy->freq = NULL; +} + +static irqreturn_t tegra_usb_phy_isr(int irq, void *data) +{ + u32 val, int_mask = ID_CHG_DET | VBUS_WAKEUP_CHG_DET; + struct tegra_usb_phy *phy = data; + void __iomem *base = phy->regs; + + /* + * The PHY interrupt also wakes the USB controller driver since + * interrupt is shared. We don't do anything in the PHY driver, + * so just clear the interrupt. + */ + val = readl_relaxed(base + USB_PHY_VBUS_WAKEUP_ID); + writel_relaxed(val, base + USB_PHY_VBUS_WAKEUP_ID); + + return val & int_mask ? IRQ_HANDLED : IRQ_NONE; +} + +static int tegra_usb_phy_set_wakeup(struct usb_phy *u_phy, bool enable) +{ + struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy); + void __iomem *base = phy->regs; + int ret = 0; + u32 val; + + if (phy->wakeup_enabled && phy->mode != USB_DR_MODE_HOST && + phy->irq > 0) { + disable_irq(phy->irq); + + val = readl_relaxed(base + USB_PHY_VBUS_WAKEUP_ID); + val &= ~(ID_INT_EN | VBUS_WAKEUP_INT_EN); + writel_relaxed(val, base + USB_PHY_VBUS_WAKEUP_ID); + + enable_irq(phy->irq); + + free_irq(phy->irq, phy); + + phy->wakeup_enabled = false; + } + + if (enable && phy->mode != USB_DR_MODE_HOST && phy->irq > 0) { + ret = request_irq(phy->irq, tegra_usb_phy_isr, IRQF_SHARED, + dev_name(phy->u_phy.dev), phy); + if (!ret) { + disable_irq(phy->irq); + + /* + * USB clock will be resumed once wake event will be + * generated. The ID-change event requires to have + * interrupts enabled, otherwise it won't be generated. + */ + val = readl_relaxed(base + USB_PHY_VBUS_WAKEUP_ID); + val |= ID_INT_EN | VBUS_WAKEUP_INT_EN; + writel_relaxed(val, base + USB_PHY_VBUS_WAKEUP_ID); + + enable_irq(phy->irq); + } else { + dev_err(phy->u_phy.dev, + "Failed to request interrupt: %d", ret); + enable = false; + } + } + + phy->wakeup_enabled = enable; + + return ret; +} + +static int tegra_usb_phy_set_suspend(struct usb_phy *u_phy, int suspend) +{ + struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy); + int ret; + + if (WARN_ON(!phy->freq)) + return -EINVAL; + + /* + * PHY is sharing IRQ with the CI driver, hence here we either + * disable interrupt for both PHY and CI or for CI only. The + * interrupt needs to be disabled while hardware is reprogrammed + * because interrupt touches the programmed registers, and thus, + * there could be a race condition. + */ + if (phy->irq > 0) + disable_irq(phy->irq); + + if (suspend) + ret = tegra_usb_phy_power_off(phy); + else + ret = tegra_usb_phy_power_on(phy); + + if (phy->irq > 0) + enable_irq(phy->irq); + + return ret; +} + +static int tegra_usb_phy_configure_pmc(struct tegra_usb_phy *phy) +{ + int err, val = 0; + + /* older device-trees don't have PMC regmap */ + if (!phy->pmc_regmap) + return 0; + + /* + * Tegra20 has a different layout of PMC USB register bits and AO is + * enabled by default after system reset on Tegra20, so assume nothing + * to do on Tegra20. + */ + if (!phy->soc_config->requires_pmc_ao_power_up) + return 0; + + /* enable VBUS wake-up detector */ + if (phy->mode != USB_DR_MODE_HOST) + val |= VBUS_WAKEUP_PD_P0 << phy->instance * 4; + + /* enable ID-pin ACC detector for OTG mode switching */ + if (phy->mode == USB_DR_MODE_OTG) + val |= ID_PD_P0 << phy->instance * 4; + + /* disable detectors to reset them */ + err = regmap_set_bits(phy->pmc_regmap, PMC_USB_AO, val); + if (err) { + dev_err(phy->u_phy.dev, "Failed to disable PMC AO: %d\n", err); + return err; + } + + usleep_range(10, 100); + + /* enable detectors */ + err = regmap_clear_bits(phy->pmc_regmap, PMC_USB_AO, val); + if (err) { + dev_err(phy->u_phy.dev, "Failed to enable PMC AO: %d\n", err); + return err; + } + + /* detectors starts to work after 10ms */ + usleep_range(10000, 15000); + + return 0; +} + +static int tegra_usb_phy_init(struct usb_phy *u_phy) +{ + struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy); + unsigned long parent_rate; + unsigned int i; + int err; + + if (WARN_ON(phy->freq)) + return 0; + + err = clk_prepare_enable(phy->pll_u); + if (err) + return err; + + parent_rate = clk_get_rate(clk_get_parent(phy->pll_u)); + for (i = 0; i < ARRAY_SIZE(tegra_freq_table); i++) { + if (tegra_freq_table[i].freq == parent_rate) { + phy->freq = &tegra_freq_table[i]; + break; + } + } + if (!phy->freq) { + dev_err(phy->u_phy.dev, "Invalid pll_u parent rate %ld\n", + parent_rate); + err = -EINVAL; + goto disable_clk; + } + + err = regulator_enable(phy->vbus); + if (err) { + dev_err(phy->u_phy.dev, + "Failed to enable USB VBUS regulator: %d\n", err); + goto disable_clk; + } + + if (!phy->is_ulpi_phy) { + err = utmip_pad_open(phy); + if (err) + goto disable_vbus; + } + + err = tegra_usb_phy_configure_pmc(phy); + if (err) + goto close_phy; + + err = tegra_usb_phy_power_on(phy); + if (err) + goto close_phy; + + return 0; + +close_phy: + if (!phy->is_ulpi_phy) + utmip_pad_close(phy); + +disable_vbus: + regulator_disable(phy->vbus); + +disable_clk: + clk_disable_unprepare(phy->pll_u); + + phy->freq = NULL; + + return err; +} + +void tegra_usb_phy_preresume(struct usb_phy *u_phy) +{ + struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy); + + if (!phy->is_ulpi_phy) + utmi_phy_preresume(phy); +} +EXPORT_SYMBOL_GPL(tegra_usb_phy_preresume); + +void tegra_usb_phy_postresume(struct usb_phy *u_phy) +{ + struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy); + + if (!phy->is_ulpi_phy) + utmi_phy_postresume(phy); +} +EXPORT_SYMBOL_GPL(tegra_usb_phy_postresume); + +void tegra_ehci_phy_restore_start(struct usb_phy *u_phy, + enum tegra_usb_phy_port_speed port_speed) +{ + struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy); + + if (!phy->is_ulpi_phy) + utmi_phy_restore_start(phy, port_speed); +} +EXPORT_SYMBOL_GPL(tegra_ehci_phy_restore_start); + +void tegra_ehci_phy_restore_end(struct usb_phy *u_phy) +{ + struct tegra_usb_phy *phy = to_tegra_usb_phy(u_phy); + + if (!phy->is_ulpi_phy) + utmi_phy_restore_end(phy); +} +EXPORT_SYMBOL_GPL(tegra_ehci_phy_restore_end); + +static int read_utmi_param(struct platform_device *pdev, const char *param, + u8 *dest) +{ + u32 value; + int err; + + err = of_property_read_u32(pdev->dev.of_node, param, &value); + if (err) + dev_err(&pdev->dev, + "Failed to read USB UTMI parameter %s: %d\n", + param, err); + else + *dest = value; + + return err; +} + +static int utmi_phy_probe(struct tegra_usb_phy *tegra_phy, + struct platform_device *pdev) +{ + struct tegra_utmip_config *config; + struct resource *res; + int err; + + tegra_phy->is_ulpi_phy = false; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (!res) { + dev_err(&pdev->dev, "Failed to get UTMI pad regs\n"); + return -ENXIO; + } + + /* + * Note that UTMI pad registers are shared by all PHYs, therefore + * devm_platform_ioremap_resource() can't be used here. + */ + tegra_phy->pad_regs = devm_ioremap(&pdev->dev, res->start, + resource_size(res)); + if (!tegra_phy->pad_regs) { + dev_err(&pdev->dev, "Failed to remap UTMI pad regs\n"); + return -ENOMEM; + } + + tegra_phy->config = devm_kzalloc(&pdev->dev, sizeof(*config), + GFP_KERNEL); + if (!tegra_phy->config) + return -ENOMEM; + + config = tegra_phy->config; + + err = read_utmi_param(pdev, "nvidia,hssync-start-delay", + &config->hssync_start_delay); + if (err) + return err; + + err = read_utmi_param(pdev, "nvidia,elastic-limit", + &config->elastic_limit); + if (err) + return err; + + err = read_utmi_param(pdev, "nvidia,idle-wait-delay", + &config->idle_wait_delay); + if (err) + return err; + + err = read_utmi_param(pdev, "nvidia,term-range-adj", + &config->term_range_adj); + if (err) + return err; + + err = read_utmi_param(pdev, "nvidia,xcvr-lsfslew", + &config->xcvr_lsfslew); + if (err) + return err; + + err = read_utmi_param(pdev, "nvidia,xcvr-lsrslew", + &config->xcvr_lsrslew); + if (err) + return err; + + if (tegra_phy->soc_config->requires_extra_tuning_parameters) { + err = read_utmi_param(pdev, "nvidia,xcvr-hsslew", + &config->xcvr_hsslew); + if (err) + return err; + + err = read_utmi_param(pdev, "nvidia,hssquelch-level", + &config->hssquelch_level); + if (err) + return err; + + err = read_utmi_param(pdev, "nvidia,hsdiscon-level", + &config->hsdiscon_level); + if (err) + return err; + } + + config->xcvr_setup_use_fuses = of_property_read_bool( + pdev->dev.of_node, "nvidia,xcvr-setup-use-fuses"); + + if (!config->xcvr_setup_use_fuses) { + err = read_utmi_param(pdev, "nvidia,xcvr-setup", + &config->xcvr_setup); + if (err) + return err; + } + + return 0; +} + +static void tegra_usb_phy_put_pmc_device(void *dev) +{ + put_device(dev); +} + +static int tegra_usb_phy_parse_pmc(struct device *dev, + struct tegra_usb_phy *phy) +{ + struct platform_device *pmc_pdev; + struct of_phandle_args args; + int err; + + err = of_parse_phandle_with_fixed_args(dev->of_node, "nvidia,pmc", + 1, 0, &args); + if (err) { + if (err != -ENOENT) + return err; + + dev_warn_once(dev, "nvidia,pmc is missing, please update your device-tree\n"); + return 0; + } + + pmc_pdev = of_find_device_by_node(args.np); + of_node_put(args.np); + if (!pmc_pdev) + return -ENODEV; + + err = devm_add_action_or_reset(dev, tegra_usb_phy_put_pmc_device, + &pmc_pdev->dev); + if (err) + return err; + + if (!platform_get_drvdata(pmc_pdev)) + return -EPROBE_DEFER; + + phy->pmc_regmap = dev_get_regmap(&pmc_pdev->dev, "usb_sleepwalk"); + if (!phy->pmc_regmap) + return -EINVAL; + + phy->instance = args.args[0]; + + return 0; +} + +static const struct tegra_phy_soc_config tegra20_soc_config = { + .utmi_pll_config_in_car_module = false, + .has_hostpc = false, + .requires_usbmode_setup = false, + .requires_extra_tuning_parameters = false, + .requires_pmc_ao_power_up = false, +}; + +static const struct tegra_phy_soc_config tegra30_soc_config = { + .utmi_pll_config_in_car_module = true, + .has_hostpc = true, + .requires_usbmode_setup = true, + .requires_extra_tuning_parameters = true, + .requires_pmc_ao_power_up = true, +}; + +static const struct of_device_id tegra_usb_phy_id_table[] = { + { .compatible = "nvidia,tegra30-usb-phy", .data = &tegra30_soc_config }, + { .compatible = "nvidia,tegra20-usb-phy", .data = &tegra20_soc_config }, + { }, +}; +MODULE_DEVICE_TABLE(of, tegra_usb_phy_id_table); + +static int tegra_usb_phy_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct tegra_usb_phy *tegra_phy; + enum usb_phy_interface phy_type; + struct reset_control *reset; + struct gpio_desc *gpiod; + struct resource *res; + struct usb_phy *phy; + int err; + + tegra_phy = devm_kzalloc(&pdev->dev, sizeof(*tegra_phy), GFP_KERNEL); + if (!tegra_phy) + return -ENOMEM; + + tegra_phy->soc_config = of_device_get_match_data(&pdev->dev); + tegra_phy->irq = platform_get_irq_optional(pdev, 0); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "Failed to get I/O memory\n"); + return -ENXIO; + } + + /* + * Note that PHY and USB controller are using shared registers, + * therefore devm_platform_ioremap_resource() can't be used here. + */ + tegra_phy->regs = devm_ioremap(&pdev->dev, res->start, + resource_size(res)); + if (!tegra_phy->regs) { + dev_err(&pdev->dev, "Failed to remap I/O memory\n"); + return -ENOMEM; + } + + tegra_phy->is_legacy_phy = + of_property_read_bool(np, "nvidia,has-legacy-mode"); + + if (of_find_property(np, "dr_mode", NULL)) + tegra_phy->mode = usb_get_dr_mode(&pdev->dev); + else + tegra_phy->mode = USB_DR_MODE_HOST; + + if (tegra_phy->mode == USB_DR_MODE_UNKNOWN) { + dev_err(&pdev->dev, "dr_mode is invalid\n"); + return -EINVAL; + } + + /* On some boards, the VBUS regulator doesn't need to be controlled */ + tegra_phy->vbus = devm_regulator_get(&pdev->dev, "vbus"); + if (IS_ERR(tegra_phy->vbus)) + return PTR_ERR(tegra_phy->vbus); + + tegra_phy->pll_u = devm_clk_get(&pdev->dev, "pll_u"); + err = PTR_ERR_OR_ZERO(tegra_phy->pll_u); + if (err) { + dev_err(&pdev->dev, "Failed to get pll_u clock: %d\n", err); + return err; + } + + err = tegra_usb_phy_parse_pmc(&pdev->dev, tegra_phy); + if (err) { + dev_err_probe(&pdev->dev, err, "Failed to get PMC regmap\n"); + return err; + } + + phy_type = of_usb_get_phy_mode(np); + switch (phy_type) { + case USBPHY_INTERFACE_MODE_UTMI: + err = utmi_phy_probe(tegra_phy, pdev); + if (err) + return err; + + tegra_phy->pad_clk = devm_clk_get(&pdev->dev, "utmi-pads"); + err = PTR_ERR_OR_ZERO(tegra_phy->pad_clk); + if (err) { + dev_err(&pdev->dev, + "Failed to get UTMIP pad clock: %d\n", err); + return err; + } + + reset = devm_reset_control_get_optional_shared(&pdev->dev, + "utmi-pads"); + err = PTR_ERR_OR_ZERO(reset); + if (err) { + dev_err(&pdev->dev, + "Failed to get UTMI-pads reset: %d\n", err); + return err; + } + tegra_phy->pad_rst = reset; + break; + + case USBPHY_INTERFACE_MODE_ULPI: + tegra_phy->is_ulpi_phy = true; + + tegra_phy->clk = devm_clk_get(&pdev->dev, "ulpi-link"); + err = PTR_ERR_OR_ZERO(tegra_phy->clk); + if (err) { + dev_err(&pdev->dev, + "Failed to get ULPI clock: %d\n", err); + return err; + } + + gpiod = devm_gpiod_get(&pdev->dev, "nvidia,phy-reset", + GPIOD_OUT_HIGH); + err = PTR_ERR_OR_ZERO(gpiod); + if (err) { + dev_err(&pdev->dev, + "Request failed for reset GPIO: %d\n", err); + return err; + } + + err = gpiod_set_consumer_name(gpiod, "ulpi_phy_reset_b"); + if (err) { + dev_err(&pdev->dev, + "Failed to set up reset GPIO name: %d\n", err); + return err; + } + + tegra_phy->reset_gpio = gpiod; + + phy = devm_otg_ulpi_create(&pdev->dev, + &ulpi_viewport_access_ops, 0); + if (!phy) { + dev_err(&pdev->dev, "Failed to create ULPI OTG\n"); + return -ENOMEM; + } + + tegra_phy->ulpi = phy; + tegra_phy->ulpi->io_priv = tegra_phy->regs + ULPI_VIEWPORT; + break; + + default: + dev_err(&pdev->dev, "phy_type %u is invalid or unsupported\n", + phy_type); + return -EINVAL; + } + + tegra_phy->u_phy.dev = &pdev->dev; + tegra_phy->u_phy.init = tegra_usb_phy_init; + tegra_phy->u_phy.shutdown = tegra_usb_phy_shutdown; + tegra_phy->u_phy.set_wakeup = tegra_usb_phy_set_wakeup; + tegra_phy->u_phy.set_suspend = tegra_usb_phy_set_suspend; + + platform_set_drvdata(pdev, tegra_phy); + + return usb_add_phy_dev(&tegra_phy->u_phy); +} + +static int tegra_usb_phy_remove(struct platform_device *pdev) +{ + struct tegra_usb_phy *tegra_phy = platform_get_drvdata(pdev); + + usb_remove_phy(&tegra_phy->u_phy); + + return 0; +} + +static struct platform_driver tegra_usb_phy_driver = { + .probe = tegra_usb_phy_probe, + .remove = tegra_usb_phy_remove, + .driver = { + .name = "tegra-phy", + .of_match_table = tegra_usb_phy_id_table, + }, +}; +module_platform_driver(tegra_usb_phy_driver); + +MODULE_DESCRIPTION("Tegra USB PHY driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/usb/phy/phy-twl6030-usb.c b/drivers/usb/phy/phy-twl6030-usb.c new file mode 100644 index 000000000..ab3c38a7d --- /dev/null +++ b/drivers/usb/phy/phy-twl6030-usb.c @@ -0,0 +1,460 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * twl6030_usb - TWL6030 USB transceiver, talking to OMAP OTG driver. + * + * Copyright (C) 2010 Texas Instruments Incorporated - https://www.ti.com + * + * Author: Hema HK <hemahk@ti.com> + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/usb/musb.h> +#include <linux/usb/phy_companion.h> +#include <linux/phy/omap_usb.h> +#include <linux/mfd/twl.h> +#include <linux/regulator/consumer.h> +#include <linux/err.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/of.h> + +/* usb register definitions */ +#define USB_VENDOR_ID_LSB 0x00 +#define USB_VENDOR_ID_MSB 0x01 +#define USB_PRODUCT_ID_LSB 0x02 +#define USB_PRODUCT_ID_MSB 0x03 +#define USB_VBUS_CTRL_SET 0x04 +#define USB_VBUS_CTRL_CLR 0x05 +#define USB_ID_CTRL_SET 0x06 +#define USB_ID_CTRL_CLR 0x07 +#define USB_VBUS_INT_SRC 0x08 +#define USB_VBUS_INT_LATCH_SET 0x09 +#define USB_VBUS_INT_LATCH_CLR 0x0A +#define USB_VBUS_INT_EN_LO_SET 0x0B +#define USB_VBUS_INT_EN_LO_CLR 0x0C +#define USB_VBUS_INT_EN_HI_SET 0x0D +#define USB_VBUS_INT_EN_HI_CLR 0x0E +#define USB_ID_INT_SRC 0x0F +#define USB_ID_INT_LATCH_SET 0x10 +#define USB_ID_INT_LATCH_CLR 0x11 + +#define USB_ID_INT_EN_LO_SET 0x12 +#define USB_ID_INT_EN_LO_CLR 0x13 +#define USB_ID_INT_EN_HI_SET 0x14 +#define USB_ID_INT_EN_HI_CLR 0x15 +#define USB_OTG_ADP_CTRL 0x16 +#define USB_OTG_ADP_HIGH 0x17 +#define USB_OTG_ADP_LOW 0x18 +#define USB_OTG_ADP_RISE 0x19 +#define USB_OTG_REVISION 0x1A + +/* to be moved to LDO */ +#define TWL6030_MISC2 0xE5 +#define TWL6030_CFG_LDO_PD2 0xF5 +#define TWL6030_BACKUP_REG 0xFA + +#define STS_HW_CONDITIONS 0x21 + +/* In module TWL6030_MODULE_PM_MASTER */ +#define STS_HW_CONDITIONS 0x21 +#define STS_USB_ID BIT(2) + +/* In module TWL6030_MODULE_PM_RECEIVER */ +#define VUSB_CFG_TRANS 0x71 +#define VUSB_CFG_STATE 0x72 +#define VUSB_CFG_VOLTAGE 0x73 + +/* in module TWL6030_MODULE_MAIN_CHARGE */ + +#define CHARGERUSB_CTRL1 0x8 + +#define CONTROLLER_STAT1 0x03 +#define VBUS_DET BIT(2) + +struct twl6030_usb { + struct phy_companion comparator; + struct device *dev; + + /* for vbus reporting with irqs disabled */ + spinlock_t lock; + + struct regulator *usb3v3; + + /* used to check initial cable status after probe */ + struct delayed_work get_status_work; + + /* used to set vbus, in atomic path */ + struct work_struct set_vbus_work; + + int irq1; + int irq2; + enum musb_vbus_id_status linkstat; + u8 asleep; + bool vbus_enable; +}; + +#define comparator_to_twl(x) container_of((x), struct twl6030_usb, comparator) + +/*-------------------------------------------------------------------------*/ + +static inline int twl6030_writeb(struct twl6030_usb *twl, u8 module, + u8 data, u8 address) +{ + int ret = 0; + + ret = twl_i2c_write_u8(module, data, address); + if (ret < 0) + dev_err(twl->dev, + "Write[0x%x] Error %d\n", address, ret); + return ret; +} + +static inline u8 twl6030_readb(struct twl6030_usb *twl, u8 module, u8 address) +{ + u8 data; + int ret; + + ret = twl_i2c_read_u8(module, &data, address); + if (ret >= 0) + ret = data; + else + dev_err(twl->dev, + "readb[0x%x,0x%x] Error %d\n", + module, address, ret); + return ret; +} + +static int twl6030_start_srp(struct phy_companion *comparator) +{ + struct twl6030_usb *twl = comparator_to_twl(comparator); + + twl6030_writeb(twl, TWL_MODULE_USB, 0x24, USB_VBUS_CTRL_SET); + twl6030_writeb(twl, TWL_MODULE_USB, 0x84, USB_VBUS_CTRL_SET); + + mdelay(100); + twl6030_writeb(twl, TWL_MODULE_USB, 0xa0, USB_VBUS_CTRL_CLR); + + return 0; +} + +static int twl6030_usb_ldo_init(struct twl6030_usb *twl) +{ + /* Set to OTG_REV 1.3 and turn on the ID_WAKEUP_COMP */ + twl6030_writeb(twl, TWL6030_MODULE_ID0, 0x1, TWL6030_BACKUP_REG); + + /* Program CFG_LDO_PD2 register and set VUSB bit */ + twl6030_writeb(twl, TWL6030_MODULE_ID0, 0x1, TWL6030_CFG_LDO_PD2); + + /* Program MISC2 register and set bit VUSB_IN_VBAT */ + twl6030_writeb(twl, TWL6030_MODULE_ID0, 0x10, TWL6030_MISC2); + + twl->usb3v3 = regulator_get(twl->dev, "usb"); + if (IS_ERR(twl->usb3v3)) + return -ENODEV; + + /* Program the USB_VBUS_CTRL_SET and set VBUS_ACT_COMP bit */ + twl6030_writeb(twl, TWL_MODULE_USB, 0x4, USB_VBUS_CTRL_SET); + + /* + * Program the USB_ID_CTRL_SET register to enable GND drive + * and the ID comparators + */ + twl6030_writeb(twl, TWL_MODULE_USB, 0x14, USB_ID_CTRL_SET); + + return 0; +} + +static ssize_t vbus_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct twl6030_usb *twl = dev_get_drvdata(dev); + unsigned long flags; + int ret = -EINVAL; + + spin_lock_irqsave(&twl->lock, flags); + + switch (twl->linkstat) { + case MUSB_VBUS_VALID: + ret = snprintf(buf, PAGE_SIZE, "vbus\n"); + break; + case MUSB_ID_GROUND: + ret = snprintf(buf, PAGE_SIZE, "id\n"); + break; + case MUSB_VBUS_OFF: + ret = snprintf(buf, PAGE_SIZE, "none\n"); + break; + default: + ret = snprintf(buf, PAGE_SIZE, "UNKNOWN\n"); + } + spin_unlock_irqrestore(&twl->lock, flags); + + return ret; +} +static DEVICE_ATTR_RO(vbus); + +static struct attribute *twl6030_attrs[] = { + &dev_attr_vbus.attr, + NULL, +}; +ATTRIBUTE_GROUPS(twl6030); + +static irqreturn_t twl6030_usb_irq(int irq, void *_twl) +{ + struct twl6030_usb *twl = _twl; + enum musb_vbus_id_status status = MUSB_UNKNOWN; + u8 vbus_state, hw_state; + int ret; + + hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS); + + vbus_state = twl6030_readb(twl, TWL_MODULE_MAIN_CHARGE, + CONTROLLER_STAT1); + if (!(hw_state & STS_USB_ID)) { + if (vbus_state & VBUS_DET) { + ret = regulator_enable(twl->usb3v3); + if (ret) + dev_err(twl->dev, "Failed to enable usb3v3\n"); + + twl->asleep = 1; + status = MUSB_VBUS_VALID; + twl->linkstat = status; + ret = musb_mailbox(status); + if (ret) + twl->linkstat = MUSB_UNKNOWN; + } else { + if (twl->linkstat != MUSB_UNKNOWN) { + status = MUSB_VBUS_OFF; + twl->linkstat = status; + ret = musb_mailbox(status); + if (ret) + twl->linkstat = MUSB_UNKNOWN; + if (twl->asleep) { + regulator_disable(twl->usb3v3); + twl->asleep = 0; + } + } + } + } + sysfs_notify(&twl->dev->kobj, NULL, "vbus"); + + return IRQ_HANDLED; +} + +static irqreturn_t twl6030_usbotg_irq(int irq, void *_twl) +{ + struct twl6030_usb *twl = _twl; + enum musb_vbus_id_status status = MUSB_UNKNOWN; + u8 hw_state; + int ret; + + hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS); + + if (hw_state & STS_USB_ID) { + ret = regulator_enable(twl->usb3v3); + if (ret) + dev_err(twl->dev, "Failed to enable usb3v3\n"); + + twl->asleep = 1; + twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_CLR); + twl6030_writeb(twl, TWL_MODULE_USB, 0x10, USB_ID_INT_EN_HI_SET); + status = MUSB_ID_GROUND; + twl->linkstat = status; + ret = musb_mailbox(status); + if (ret) + twl->linkstat = MUSB_UNKNOWN; + } else { + twl6030_writeb(twl, TWL_MODULE_USB, 0x10, USB_ID_INT_EN_HI_CLR); + twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_SET); + } + twl6030_writeb(twl, TWL_MODULE_USB, status, USB_ID_INT_LATCH_CLR); + + return IRQ_HANDLED; +} + +static void twl6030_status_work(struct work_struct *work) +{ + struct twl6030_usb *twl = container_of(work, struct twl6030_usb, + get_status_work.work); + + twl6030_usb_irq(twl->irq2, twl); + twl6030_usbotg_irq(twl->irq1, twl); +} + +static int twl6030_enable_irq(struct twl6030_usb *twl) +{ + twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_SET); + twl6030_interrupt_unmask(0x05, REG_INT_MSK_LINE_C); + twl6030_interrupt_unmask(0x05, REG_INT_MSK_STS_C); + + twl6030_interrupt_unmask(TWL6030_CHARGER_CTRL_INT_MASK, + REG_INT_MSK_LINE_C); + twl6030_interrupt_unmask(TWL6030_CHARGER_CTRL_INT_MASK, + REG_INT_MSK_STS_C); + + return 0; +} + +static void otg_set_vbus_work(struct work_struct *data) +{ + struct twl6030_usb *twl = container_of(data, struct twl6030_usb, + set_vbus_work); + + /* + * Start driving VBUS. Set OPA_MODE bit in CHARGERUSB_CTRL1 + * register. This enables boost mode. + */ + + if (twl->vbus_enable) + twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE, 0x40, + CHARGERUSB_CTRL1); + else + twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE, 0x00, + CHARGERUSB_CTRL1); +} + +static int twl6030_set_vbus(struct phy_companion *comparator, bool enabled) +{ + struct twl6030_usb *twl = comparator_to_twl(comparator); + + twl->vbus_enable = enabled; + schedule_work(&twl->set_vbus_work); + + return 0; +} + +static int twl6030_usb_probe(struct platform_device *pdev) +{ + u32 ret; + struct twl6030_usb *twl; + int status, err; + struct device_node *np = pdev->dev.of_node; + struct device *dev = &pdev->dev; + + if (!np) { + dev_err(dev, "no DT info\n"); + return -EINVAL; + } + + twl = devm_kzalloc(dev, sizeof(*twl), GFP_KERNEL); + if (!twl) + return -ENOMEM; + + twl->dev = &pdev->dev; + twl->irq1 = platform_get_irq(pdev, 0); + twl->irq2 = platform_get_irq(pdev, 1); + twl->linkstat = MUSB_UNKNOWN; + + if (twl->irq1 < 0) + return twl->irq1; + if (twl->irq2 < 0) + return twl->irq2; + + twl->comparator.set_vbus = twl6030_set_vbus; + twl->comparator.start_srp = twl6030_start_srp; + + ret = omap_usb2_set_comparator(&twl->comparator); + if (ret == -ENODEV) { + dev_info(&pdev->dev, "phy not ready, deferring probe"); + return -EPROBE_DEFER; + } + + /* init spinlock for workqueue */ + spin_lock_init(&twl->lock); + + err = twl6030_usb_ldo_init(twl); + if (err) { + dev_err(&pdev->dev, "ldo init failed\n"); + return err; + } + + platform_set_drvdata(pdev, twl); + + INIT_WORK(&twl->set_vbus_work, otg_set_vbus_work); + INIT_DELAYED_WORK(&twl->get_status_work, twl6030_status_work); + + status = request_threaded_irq(twl->irq1, NULL, twl6030_usbotg_irq, + IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_ONESHOT, + "twl6030_usb", twl); + if (status < 0) { + dev_err(&pdev->dev, "can't get IRQ %d, err %d\n", + twl->irq1, status); + goto err_put_regulator; + } + + status = request_threaded_irq(twl->irq2, NULL, twl6030_usb_irq, + IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_ONESHOT, + "twl6030_usb", twl); + if (status < 0) { + dev_err(&pdev->dev, "can't get IRQ %d, err %d\n", + twl->irq2, status); + goto err_free_irq1; + } + + twl->asleep = 0; + twl6030_enable_irq(twl); + schedule_delayed_work(&twl->get_status_work, HZ); + dev_info(&pdev->dev, "Initialized TWL6030 USB module\n"); + + return 0; + +err_free_irq1: + free_irq(twl->irq1, twl); +err_put_regulator: + regulator_put(twl->usb3v3); + + return status; +} + +static int twl6030_usb_remove(struct platform_device *pdev) +{ + struct twl6030_usb *twl = platform_get_drvdata(pdev); + + cancel_delayed_work_sync(&twl->get_status_work); + twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK, + REG_INT_MSK_LINE_C); + twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK, + REG_INT_MSK_STS_C); + free_irq(twl->irq1, twl); + free_irq(twl->irq2, twl); + regulator_put(twl->usb3v3); + cancel_work_sync(&twl->set_vbus_work); + + return 0; +} + +static const struct of_device_id twl6030_usb_id_table[] = { + { .compatible = "ti,twl6030-usb" }, + {} +}; +MODULE_DEVICE_TABLE(of, twl6030_usb_id_table); + +static struct platform_driver twl6030_usb_driver = { + .probe = twl6030_usb_probe, + .remove = twl6030_usb_remove, + .driver = { + .name = "twl6030_usb", + .of_match_table = of_match_ptr(twl6030_usb_id_table), + .dev_groups = twl6030_groups, + }, +}; + +static int __init twl6030_usb_init(void) +{ + return platform_driver_register(&twl6030_usb_driver); +} +subsys_initcall(twl6030_usb_init); + +static void __exit twl6030_usb_exit(void) +{ + platform_driver_unregister(&twl6030_usb_driver); +} +module_exit(twl6030_usb_exit); + +MODULE_ALIAS("platform:twl6030_usb"); +MODULE_AUTHOR("Hema HK <hemahk@ti.com>"); +MODULE_DESCRIPTION("TWL6030 USB transceiver driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/usb/phy/phy-ulpi-viewport.c b/drivers/usb/phy/phy-ulpi-viewport.c new file mode 100644 index 000000000..0f61e328e --- /dev/null +++ b/drivers/usb/phy/phy-ulpi-viewport.c @@ -0,0 +1,67 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2011 Google, Inc. + */ + +#include <linux/export.h> +#include <linux/kernel.h> +#include <linux/usb.h> +#include <linux/io.h> +#include <linux/iopoll.h> +#include <linux/usb/otg.h> +#include <linux/usb/ulpi.h> + +#define ULPI_VIEW_WAKEUP (1 << 31) +#define ULPI_VIEW_RUN (1 << 30) +#define ULPI_VIEW_WRITE (1 << 29) +#define ULPI_VIEW_READ (0 << 29) +#define ULPI_VIEW_ADDR(x) (((x) & 0xff) << 16) +#define ULPI_VIEW_DATA_READ(x) (((x) >> 8) & 0xff) +#define ULPI_VIEW_DATA_WRITE(x) ((x) & 0xff) + +static int ulpi_viewport_wait(void __iomem *view, u32 mask) +{ + u32 val; + + return readl_poll_timeout_atomic(view, val, !(val & mask), 1, 2000); +} + +static int ulpi_viewport_read(struct usb_phy *otg, u32 reg) +{ + int ret; + void __iomem *view = otg->io_priv; + + writel(ULPI_VIEW_WAKEUP | ULPI_VIEW_WRITE, view); + ret = ulpi_viewport_wait(view, ULPI_VIEW_WAKEUP); + if (ret) + return ret; + + writel(ULPI_VIEW_RUN | ULPI_VIEW_READ | ULPI_VIEW_ADDR(reg), view); + ret = ulpi_viewport_wait(view, ULPI_VIEW_RUN); + if (ret) + return ret; + + return ULPI_VIEW_DATA_READ(readl(view)); +} + +static int ulpi_viewport_write(struct usb_phy *otg, u32 val, u32 reg) +{ + int ret; + void __iomem *view = otg->io_priv; + + writel(ULPI_VIEW_WAKEUP | ULPI_VIEW_WRITE, view); + ret = ulpi_viewport_wait(view, ULPI_VIEW_WAKEUP); + if (ret) + return ret; + + writel(ULPI_VIEW_RUN | ULPI_VIEW_WRITE | ULPI_VIEW_DATA_WRITE(val) | + ULPI_VIEW_ADDR(reg), view); + + return ulpi_viewport_wait(view, ULPI_VIEW_RUN); +} + +struct usb_phy_io_ops ulpi_viewport_access_ops = { + .read = ulpi_viewport_read, + .write = ulpi_viewport_write, +}; +EXPORT_SYMBOL_GPL(ulpi_viewport_access_ops); diff --git a/drivers/usb/phy/phy-ulpi.c b/drivers/usb/phy/phy-ulpi.c new file mode 100644 index 000000000..e683a37e3 --- /dev/null +++ b/drivers/usb/phy/phy-ulpi.c @@ -0,0 +1,303 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Generic ULPI USB transceiver support + * + * Copyright (C) 2009 Daniel Mack <daniel@caiaq.de> + * + * Based on sources from + * + * Sascha Hauer <s.hauer@pengutronix.de> + * Freescale Semiconductors + */ + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/export.h> +#include <linux/usb.h> +#include <linux/usb/otg.h> +#include <linux/usb/ulpi.h> + + +struct ulpi_info { + unsigned int id; + char *name; +}; + +#define ULPI_ID(vendor, product) (((vendor) << 16) | (product)) +#define ULPI_INFO(_id, _name) \ + { \ + .id = (_id), \ + .name = (_name), \ + } + +/* ULPI hardcoded IDs, used for probing */ +static struct ulpi_info ulpi_ids[] = { + ULPI_INFO(ULPI_ID(0x04cc, 0x1504), "NXP ISP1504"), + ULPI_INFO(ULPI_ID(0x0424, 0x0006), "SMSC USB331x"), + ULPI_INFO(ULPI_ID(0x0424, 0x0007), "SMSC USB3320"), + ULPI_INFO(ULPI_ID(0x0424, 0x0009), "SMSC USB334x"), + ULPI_INFO(ULPI_ID(0x0451, 0x1507), "TI TUSB1210"), +}; + +static int ulpi_set_otg_flags(struct usb_phy *phy) +{ + unsigned int flags = ULPI_OTG_CTRL_DP_PULLDOWN | + ULPI_OTG_CTRL_DM_PULLDOWN; + + if (phy->flags & ULPI_OTG_ID_PULLUP) + flags |= ULPI_OTG_CTRL_ID_PULLUP; + + /* + * ULPI Specification rev.1.1 default + * for Dp/DmPulldown is enabled. + */ + if (phy->flags & ULPI_OTG_DP_PULLDOWN_DIS) + flags &= ~ULPI_OTG_CTRL_DP_PULLDOWN; + + if (phy->flags & ULPI_OTG_DM_PULLDOWN_DIS) + flags &= ~ULPI_OTG_CTRL_DM_PULLDOWN; + + if (phy->flags & ULPI_OTG_EXTVBUSIND) + flags |= ULPI_OTG_CTRL_EXTVBUSIND; + + return usb_phy_io_write(phy, flags, ULPI_OTG_CTRL); +} + +static int ulpi_set_fc_flags(struct usb_phy *phy) +{ + unsigned int flags = 0; + + /* + * ULPI Specification rev.1.1 default + * for XcvrSelect is Full Speed. + */ + if (phy->flags & ULPI_FC_HS) + flags |= ULPI_FUNC_CTRL_HIGH_SPEED; + else if (phy->flags & ULPI_FC_LS) + flags |= ULPI_FUNC_CTRL_LOW_SPEED; + else if (phy->flags & ULPI_FC_FS4LS) + flags |= ULPI_FUNC_CTRL_FS4LS; + else + flags |= ULPI_FUNC_CTRL_FULL_SPEED; + + if (phy->flags & ULPI_FC_TERMSEL) + flags |= ULPI_FUNC_CTRL_TERMSELECT; + + /* + * ULPI Specification rev.1.1 default + * for OpMode is Normal Operation. + */ + if (phy->flags & ULPI_FC_OP_NODRV) + flags |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING; + else if (phy->flags & ULPI_FC_OP_DIS_NRZI) + flags |= ULPI_FUNC_CTRL_OPMODE_DISABLE_NRZI; + else if (phy->flags & ULPI_FC_OP_NSYNC_NEOP) + flags |= ULPI_FUNC_CTRL_OPMODE_NOSYNC_NOEOP; + else + flags |= ULPI_FUNC_CTRL_OPMODE_NORMAL; + + /* + * ULPI Specification rev.1.1 default + * for SuspendM is Powered. + */ + flags |= ULPI_FUNC_CTRL_SUSPENDM; + + return usb_phy_io_write(phy, flags, ULPI_FUNC_CTRL); +} + +static int ulpi_set_ic_flags(struct usb_phy *phy) +{ + unsigned int flags = 0; + + if (phy->flags & ULPI_IC_AUTORESUME) + flags |= ULPI_IFC_CTRL_AUTORESUME; + + if (phy->flags & ULPI_IC_EXTVBUS_INDINV) + flags |= ULPI_IFC_CTRL_EXTERNAL_VBUS; + + if (phy->flags & ULPI_IC_IND_PASSTHRU) + flags |= ULPI_IFC_CTRL_PASSTHRU; + + if (phy->flags & ULPI_IC_PROTECT_DIS) + flags |= ULPI_IFC_CTRL_PROTECT_IFC_DISABLE; + + return usb_phy_io_write(phy, flags, ULPI_IFC_CTRL); +} + +static int ulpi_set_flags(struct usb_phy *phy) +{ + int ret; + + ret = ulpi_set_otg_flags(phy); + if (ret) + return ret; + + ret = ulpi_set_ic_flags(phy); + if (ret) + return ret; + + return ulpi_set_fc_flags(phy); +} + +static int ulpi_check_integrity(struct usb_phy *phy) +{ + int ret, i; + unsigned int val = 0x55; + + for (i = 0; i < 2; i++) { + ret = usb_phy_io_write(phy, val, ULPI_SCRATCH); + if (ret < 0) + return ret; + + ret = usb_phy_io_read(phy, ULPI_SCRATCH); + if (ret < 0) + return ret; + + if (ret != val) { + pr_err("ULPI integrity check: failed!"); + return -ENODEV; + } + val = val << 1; + } + + pr_info("ULPI integrity check: passed.\n"); + + return 0; +} + +static int ulpi_init(struct usb_phy *phy) +{ + int i, vid, pid, ret; + u32 ulpi_id = 0; + + for (i = 0; i < 4; i++) { + ret = usb_phy_io_read(phy, ULPI_PRODUCT_ID_HIGH - i); + if (ret < 0) + return ret; + ulpi_id = (ulpi_id << 8) | ret; + } + vid = ulpi_id & 0xffff; + pid = ulpi_id >> 16; + + pr_info("ULPI transceiver vendor/product ID 0x%04x/0x%04x\n", vid, pid); + + for (i = 0; i < ARRAY_SIZE(ulpi_ids); i++) { + if (ulpi_ids[i].id == ULPI_ID(vid, pid)) { + pr_info("Found %s ULPI transceiver.\n", + ulpi_ids[i].name); + break; + } + } + + ret = ulpi_check_integrity(phy); + if (ret) + return ret; + + return ulpi_set_flags(phy); +} + +static int ulpi_set_host(struct usb_otg *otg, struct usb_bus *host) +{ + struct usb_phy *phy = otg->usb_phy; + unsigned int flags = usb_phy_io_read(phy, ULPI_IFC_CTRL); + + if (!host) { + otg->host = NULL; + return 0; + } + + otg->host = host; + + flags &= ~(ULPI_IFC_CTRL_6_PIN_SERIAL_MODE | + ULPI_IFC_CTRL_3_PIN_SERIAL_MODE | + ULPI_IFC_CTRL_CARKITMODE); + + if (phy->flags & ULPI_IC_6PIN_SERIAL) + flags |= ULPI_IFC_CTRL_6_PIN_SERIAL_MODE; + else if (phy->flags & ULPI_IC_3PIN_SERIAL) + flags |= ULPI_IFC_CTRL_3_PIN_SERIAL_MODE; + else if (phy->flags & ULPI_IC_CARKIT) + flags |= ULPI_IFC_CTRL_CARKITMODE; + + return usb_phy_io_write(phy, flags, ULPI_IFC_CTRL); +} + +static int ulpi_set_vbus(struct usb_otg *otg, bool on) +{ + struct usb_phy *phy = otg->usb_phy; + unsigned int flags = usb_phy_io_read(phy, ULPI_OTG_CTRL); + + flags &= ~(ULPI_OTG_CTRL_DRVVBUS | ULPI_OTG_CTRL_DRVVBUS_EXT); + + if (on) { + if (phy->flags & ULPI_OTG_DRVVBUS) + flags |= ULPI_OTG_CTRL_DRVVBUS; + + if (phy->flags & ULPI_OTG_DRVVBUS_EXT) + flags |= ULPI_OTG_CTRL_DRVVBUS_EXT; + } + + return usb_phy_io_write(phy, flags, ULPI_OTG_CTRL); +} + +static void otg_ulpi_init(struct usb_phy *phy, struct usb_otg *otg, + struct usb_phy_io_ops *ops, + unsigned int flags) +{ + phy->label = "ULPI"; + phy->flags = flags; + phy->io_ops = ops; + phy->otg = otg; + phy->init = ulpi_init; + + otg->usb_phy = phy; + otg->set_host = ulpi_set_host; + otg->set_vbus = ulpi_set_vbus; +} + +struct usb_phy * +otg_ulpi_create(struct usb_phy_io_ops *ops, + unsigned int flags) +{ + struct usb_phy *phy; + struct usb_otg *otg; + + phy = kzalloc(sizeof(*phy), GFP_KERNEL); + if (!phy) + return NULL; + + otg = kzalloc(sizeof(*otg), GFP_KERNEL); + if (!otg) { + kfree(phy); + return NULL; + } + + otg_ulpi_init(phy, otg, ops, flags); + + return phy; +} +EXPORT_SYMBOL_GPL(otg_ulpi_create); + +struct usb_phy * +devm_otg_ulpi_create(struct device *dev, + struct usb_phy_io_ops *ops, + unsigned int flags) +{ + struct usb_phy *phy; + struct usb_otg *otg; + + phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL); + if (!phy) + return NULL; + + otg = devm_kzalloc(dev, sizeof(*otg), GFP_KERNEL); + if (!otg) { + devm_kfree(dev, phy); + return NULL; + } + + otg_ulpi_init(phy, otg, ops, flags); + + return phy; +} +EXPORT_SYMBOL_GPL(devm_otg_ulpi_create); diff --git a/drivers/usb/phy/phy.c b/drivers/usb/phy/phy.c new file mode 100644 index 000000000..1b24492bb --- /dev/null +++ b/drivers/usb/phy/phy.c @@ -0,0 +1,770 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * phy.c -- USB phy handling + * + * Copyright (C) 2004-2013 Texas Instruments + */ +#include <linux/kernel.h> +#include <linux/export.h> +#include <linux/err.h> +#include <linux/device.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/of.h> + +#include <linux/usb/phy.h> + +/* Default current range by charger type. */ +#define DEFAULT_SDP_CUR_MIN 2 +#define DEFAULT_SDP_CUR_MAX 500 +#define DEFAULT_SDP_CUR_MIN_SS 150 +#define DEFAULT_SDP_CUR_MAX_SS 900 +#define DEFAULT_DCP_CUR_MIN 500 +#define DEFAULT_DCP_CUR_MAX 5000 +#define DEFAULT_CDP_CUR_MIN 1500 +#define DEFAULT_CDP_CUR_MAX 5000 +#define DEFAULT_ACA_CUR_MIN 1500 +#define DEFAULT_ACA_CUR_MAX 5000 + +static LIST_HEAD(phy_list); +static DEFINE_SPINLOCK(phy_lock); + +struct phy_devm { + struct usb_phy *phy; + struct notifier_block *nb; +}; + +static const char *const usb_chger_type[] = { + [UNKNOWN_TYPE] = "USB_CHARGER_UNKNOWN_TYPE", + [SDP_TYPE] = "USB_CHARGER_SDP_TYPE", + [CDP_TYPE] = "USB_CHARGER_CDP_TYPE", + [DCP_TYPE] = "USB_CHARGER_DCP_TYPE", + [ACA_TYPE] = "USB_CHARGER_ACA_TYPE", +}; + +static const char *const usb_chger_state[] = { + [USB_CHARGER_DEFAULT] = "USB_CHARGER_DEFAULT", + [USB_CHARGER_PRESENT] = "USB_CHARGER_PRESENT", + [USB_CHARGER_ABSENT] = "USB_CHARGER_ABSENT", +}; + +static struct usb_phy *__usb_find_phy(struct list_head *list, + enum usb_phy_type type) +{ + struct usb_phy *phy = NULL; + + list_for_each_entry(phy, list, head) { + if (phy->type != type) + continue; + + return phy; + } + + return ERR_PTR(-ENODEV); +} + +static struct usb_phy *__of_usb_find_phy(struct device_node *node) +{ + struct usb_phy *phy; + + if (!of_device_is_available(node)) + return ERR_PTR(-ENODEV); + + list_for_each_entry(phy, &phy_list, head) { + if (node != phy->dev->of_node) + continue; + + return phy; + } + + return ERR_PTR(-EPROBE_DEFER); +} + +static struct usb_phy *__device_to_usb_phy(struct device *dev) +{ + struct usb_phy *usb_phy; + + list_for_each_entry(usb_phy, &phy_list, head) { + if (usb_phy->dev == dev) + return usb_phy; + } + + return NULL; +} + +static void usb_phy_set_default_current(struct usb_phy *usb_phy) +{ + usb_phy->chg_cur.sdp_min = DEFAULT_SDP_CUR_MIN; + usb_phy->chg_cur.sdp_max = DEFAULT_SDP_CUR_MAX; + usb_phy->chg_cur.dcp_min = DEFAULT_DCP_CUR_MIN; + usb_phy->chg_cur.dcp_max = DEFAULT_DCP_CUR_MAX; + usb_phy->chg_cur.cdp_min = DEFAULT_CDP_CUR_MIN; + usb_phy->chg_cur.cdp_max = DEFAULT_CDP_CUR_MAX; + usb_phy->chg_cur.aca_min = DEFAULT_ACA_CUR_MIN; + usb_phy->chg_cur.aca_max = DEFAULT_ACA_CUR_MAX; +} + +/** + * usb_phy_notify_charger_work - notify the USB charger state + * @work: the charger work to notify the USB charger state + * + * This work can be issued when USB charger state has been changed or + * USB charger current has been changed, then we can notify the current + * what can be drawn to power user and the charger state to userspace. + * + * If we get the charger type from extcon subsystem, we can notify the + * charger state to power user automatically by usb_phy_get_charger_type() + * issuing from extcon subsystem. + * + * If we get the charger type from ->charger_detect() instead of extcon + * subsystem, the usb phy driver should issue usb_phy_set_charger_state() + * to set charger state when the charger state has been changed. + */ +static void usb_phy_notify_charger_work(struct work_struct *work) +{ + struct usb_phy *usb_phy = container_of(work, struct usb_phy, chg_work); + unsigned int min, max; + + switch (usb_phy->chg_state) { + case USB_CHARGER_PRESENT: + usb_phy_get_charger_current(usb_phy, &min, &max); + + atomic_notifier_call_chain(&usb_phy->notifier, max, usb_phy); + break; + case USB_CHARGER_ABSENT: + usb_phy_set_default_current(usb_phy); + + atomic_notifier_call_chain(&usb_phy->notifier, 0, usb_phy); + break; + default: + dev_warn(usb_phy->dev, "Unknown USB charger state: %d\n", + usb_phy->chg_state); + return; + } + + kobject_uevent(&usb_phy->dev->kobj, KOBJ_CHANGE); +} + +static int usb_phy_uevent(struct device *dev, struct kobj_uevent_env *env) +{ + struct usb_phy *usb_phy; + char uchger_state[50] = { 0 }; + char uchger_type[50] = { 0 }; + unsigned long flags; + + spin_lock_irqsave(&phy_lock, flags); + usb_phy = __device_to_usb_phy(dev); + spin_unlock_irqrestore(&phy_lock, flags); + + if (!usb_phy) + return -ENODEV; + + snprintf(uchger_state, ARRAY_SIZE(uchger_state), + "USB_CHARGER_STATE=%s", usb_chger_state[usb_phy->chg_state]); + + snprintf(uchger_type, ARRAY_SIZE(uchger_type), + "USB_CHARGER_TYPE=%s", usb_chger_type[usb_phy->chg_type]); + + if (add_uevent_var(env, uchger_state)) + return -ENOMEM; + + if (add_uevent_var(env, uchger_type)) + return -ENOMEM; + + return 0; +} + +static void __usb_phy_get_charger_type(struct usb_phy *usb_phy) +{ + if (extcon_get_state(usb_phy->edev, EXTCON_CHG_USB_SDP) > 0) { + usb_phy->chg_type = SDP_TYPE; + usb_phy->chg_state = USB_CHARGER_PRESENT; + } else if (extcon_get_state(usb_phy->edev, EXTCON_CHG_USB_CDP) > 0) { + usb_phy->chg_type = CDP_TYPE; + usb_phy->chg_state = USB_CHARGER_PRESENT; + } else if (extcon_get_state(usb_phy->edev, EXTCON_CHG_USB_DCP) > 0) { + usb_phy->chg_type = DCP_TYPE; + usb_phy->chg_state = USB_CHARGER_PRESENT; + } else if (extcon_get_state(usb_phy->edev, EXTCON_CHG_USB_ACA) > 0) { + usb_phy->chg_type = ACA_TYPE; + usb_phy->chg_state = USB_CHARGER_PRESENT; + } else { + usb_phy->chg_type = UNKNOWN_TYPE; + usb_phy->chg_state = USB_CHARGER_ABSENT; + } + + schedule_work(&usb_phy->chg_work); +} + +/** + * usb_phy_get_charger_type - get charger type from extcon subsystem + * @nb: the notifier block to determine charger type + * @state: the cable state + * @data: private data + * + * Determin the charger type from extcon subsystem which also means the + * charger state has been chaned, then we should notify this event. + */ +static int usb_phy_get_charger_type(struct notifier_block *nb, + unsigned long state, void *data) +{ + struct usb_phy *usb_phy = container_of(nb, struct usb_phy, type_nb); + + __usb_phy_get_charger_type(usb_phy); + return NOTIFY_OK; +} + +/** + * usb_phy_set_charger_current - set the USB charger current + * @usb_phy: the USB phy to be used + * @mA: the current need to be set + * + * Usually we only change the charger default current when USB finished the + * enumeration as one SDP charger. As one SDP charger, usb_phy_set_power() + * will issue this function to change charger current when after setting USB + * configuration, or suspend/resume USB. For other type charger, we should + * use the default charger current and we do not suggest to issue this function + * to change the charger current. + * + * When USB charger current has been changed, we need to notify the power users. + */ +void usb_phy_set_charger_current(struct usb_phy *usb_phy, unsigned int mA) +{ + switch (usb_phy->chg_type) { + case SDP_TYPE: + if (usb_phy->chg_cur.sdp_max == mA) + return; + + usb_phy->chg_cur.sdp_max = (mA > DEFAULT_SDP_CUR_MAX_SS) ? + DEFAULT_SDP_CUR_MAX_SS : mA; + break; + case DCP_TYPE: + if (usb_phy->chg_cur.dcp_max == mA) + return; + + usb_phy->chg_cur.dcp_max = (mA > DEFAULT_DCP_CUR_MAX) ? + DEFAULT_DCP_CUR_MAX : mA; + break; + case CDP_TYPE: + if (usb_phy->chg_cur.cdp_max == mA) + return; + + usb_phy->chg_cur.cdp_max = (mA > DEFAULT_CDP_CUR_MAX) ? + DEFAULT_CDP_CUR_MAX : mA; + break; + case ACA_TYPE: + if (usb_phy->chg_cur.aca_max == mA) + return; + + usb_phy->chg_cur.aca_max = (mA > DEFAULT_ACA_CUR_MAX) ? + DEFAULT_ACA_CUR_MAX : mA; + break; + default: + return; + } + + schedule_work(&usb_phy->chg_work); +} +EXPORT_SYMBOL_GPL(usb_phy_set_charger_current); + +/** + * usb_phy_get_charger_current - get the USB charger current + * @usb_phy: the USB phy to be used + * @min: the minimum current + * @max: the maximum current + * + * Usually we will notify the maximum current to power user, but for some + * special case, power user also need the minimum current value. Then the + * power user can issue this function to get the suitable current. + */ +void usb_phy_get_charger_current(struct usb_phy *usb_phy, + unsigned int *min, unsigned int *max) +{ + switch (usb_phy->chg_type) { + case SDP_TYPE: + *min = usb_phy->chg_cur.sdp_min; + *max = usb_phy->chg_cur.sdp_max; + break; + case DCP_TYPE: + *min = usb_phy->chg_cur.dcp_min; + *max = usb_phy->chg_cur.dcp_max; + break; + case CDP_TYPE: + *min = usb_phy->chg_cur.cdp_min; + *max = usb_phy->chg_cur.cdp_max; + break; + case ACA_TYPE: + *min = usb_phy->chg_cur.aca_min; + *max = usb_phy->chg_cur.aca_max; + break; + default: + *min = 0; + *max = 0; + break; + } +} +EXPORT_SYMBOL_GPL(usb_phy_get_charger_current); + +/** + * usb_phy_set_charger_state - set the USB charger state + * @usb_phy: the USB phy to be used + * @state: the new state need to be set for charger + * + * The usb phy driver can issue this function when the usb phy driver + * detected the charger state has been changed, in this case the charger + * type should be get from ->charger_detect(). + */ +void usb_phy_set_charger_state(struct usb_phy *usb_phy, + enum usb_charger_state state) +{ + if (usb_phy->chg_state == state || !usb_phy->charger_detect) + return; + + usb_phy->chg_state = state; + if (usb_phy->chg_state == USB_CHARGER_PRESENT) + usb_phy->chg_type = usb_phy->charger_detect(usb_phy); + else + usb_phy->chg_type = UNKNOWN_TYPE; + + schedule_work(&usb_phy->chg_work); +} +EXPORT_SYMBOL_GPL(usb_phy_set_charger_state); + +static void devm_usb_phy_release(struct device *dev, void *res) +{ + struct usb_phy *phy = *(struct usb_phy **)res; + + usb_put_phy(phy); +} + +static void devm_usb_phy_release2(struct device *dev, void *_res) +{ + struct phy_devm *res = _res; + + if (res->nb) + usb_unregister_notifier(res->phy, res->nb); + usb_put_phy(res->phy); +} + +static int devm_usb_phy_match(struct device *dev, void *res, void *match_data) +{ + struct usb_phy **phy = res; + + return *phy == match_data; +} + +static void usb_charger_init(struct usb_phy *usb_phy) +{ + usb_phy->chg_type = UNKNOWN_TYPE; + usb_phy->chg_state = USB_CHARGER_DEFAULT; + usb_phy_set_default_current(usb_phy); + INIT_WORK(&usb_phy->chg_work, usb_phy_notify_charger_work); +} + +static int usb_add_extcon(struct usb_phy *x) +{ + int ret; + + if (of_property_read_bool(x->dev->of_node, "extcon")) { + x->edev = extcon_get_edev_by_phandle(x->dev, 0); + if (IS_ERR(x->edev)) + return PTR_ERR(x->edev); + + x->id_edev = extcon_get_edev_by_phandle(x->dev, 1); + if (IS_ERR(x->id_edev)) { + x->id_edev = NULL; + dev_info(x->dev, "No separate ID extcon device\n"); + } + + if (x->vbus_nb.notifier_call) { + ret = devm_extcon_register_notifier(x->dev, x->edev, + EXTCON_USB, + &x->vbus_nb); + if (ret < 0) { + dev_err(x->dev, + "register VBUS notifier failed\n"); + return ret; + } + } else { + x->type_nb.notifier_call = usb_phy_get_charger_type; + + ret = devm_extcon_register_notifier(x->dev, x->edev, + EXTCON_CHG_USB_SDP, + &x->type_nb); + if (ret) { + dev_err(x->dev, + "register extcon USB SDP failed.\n"); + return ret; + } + + ret = devm_extcon_register_notifier(x->dev, x->edev, + EXTCON_CHG_USB_CDP, + &x->type_nb); + if (ret) { + dev_err(x->dev, + "register extcon USB CDP failed.\n"); + return ret; + } + + ret = devm_extcon_register_notifier(x->dev, x->edev, + EXTCON_CHG_USB_DCP, + &x->type_nb); + if (ret) { + dev_err(x->dev, + "register extcon USB DCP failed.\n"); + return ret; + } + + ret = devm_extcon_register_notifier(x->dev, x->edev, + EXTCON_CHG_USB_ACA, + &x->type_nb); + if (ret) { + dev_err(x->dev, + "register extcon USB ACA failed.\n"); + return ret; + } + } + + if (x->id_nb.notifier_call) { + struct extcon_dev *id_ext; + + if (x->id_edev) + id_ext = x->id_edev; + else + id_ext = x->edev; + + ret = devm_extcon_register_notifier(x->dev, id_ext, + EXTCON_USB_HOST, + &x->id_nb); + if (ret < 0) { + dev_err(x->dev, + "register ID notifier failed\n"); + return ret; + } + } + } + + if (x->type_nb.notifier_call) + __usb_phy_get_charger_type(x); + + return 0; +} + +/** + * devm_usb_get_phy - find the USB PHY + * @dev: device that requests this phy + * @type: the type of the phy the controller requires + * + * Gets the phy using usb_get_phy(), and associates a device with it using + * devres. On driver detach, release function is invoked on the devres data, + * then, devres data is freed. + * + * For use by USB host and peripheral drivers. + */ +struct usb_phy *devm_usb_get_phy(struct device *dev, enum usb_phy_type type) +{ + struct usb_phy **ptr, *phy; + + ptr = devres_alloc(devm_usb_phy_release, sizeof(*ptr), GFP_KERNEL); + if (!ptr) + return ERR_PTR(-ENOMEM); + + phy = usb_get_phy(type); + if (!IS_ERR(phy)) { + *ptr = phy; + devres_add(dev, ptr); + } else + devres_free(ptr); + + return phy; +} +EXPORT_SYMBOL_GPL(devm_usb_get_phy); + +/** + * usb_get_phy - find the USB PHY + * @type: the type of the phy the controller requires + * + * Returns the phy driver, after getting a refcount to it; or + * -ENODEV if there is no such phy. The caller is responsible for + * calling usb_put_phy() to release that count. + * + * For use by USB host and peripheral drivers. + */ +struct usb_phy *usb_get_phy(enum usb_phy_type type) +{ + struct usb_phy *phy = NULL; + unsigned long flags; + + spin_lock_irqsave(&phy_lock, flags); + + phy = __usb_find_phy(&phy_list, type); + if (IS_ERR(phy) || !try_module_get(phy->dev->driver->owner)) { + pr_debug("PHY: unable to find transceiver of type %s\n", + usb_phy_type_string(type)); + if (!IS_ERR(phy)) + phy = ERR_PTR(-ENODEV); + + goto err0; + } + + get_device(phy->dev); + +err0: + spin_unlock_irqrestore(&phy_lock, flags); + + return phy; +} +EXPORT_SYMBOL_GPL(usb_get_phy); + +/** + * devm_usb_get_phy_by_node - find the USB PHY by device_node + * @dev: device that requests this phy + * @node: the device_node for the phy device. + * @nb: a notifier_block to register with the phy. + * + * Returns the phy driver associated with the given device_node, + * after getting a refcount to it, -ENODEV if there is no such phy or + * -EPROBE_DEFER if the device is not yet loaded. While at that, it + * also associates the device with + * the phy using devres. On driver detach, release function is invoked + * on the devres data, then, devres data is freed. + * + * For use by peripheral drivers for devices related to a phy, + * such as a charger. + */ +struct usb_phy *devm_usb_get_phy_by_node(struct device *dev, + struct device_node *node, + struct notifier_block *nb) +{ + struct usb_phy *phy = ERR_PTR(-ENOMEM); + struct phy_devm *ptr; + unsigned long flags; + + ptr = devres_alloc(devm_usb_phy_release2, sizeof(*ptr), GFP_KERNEL); + if (!ptr) { + dev_dbg(dev, "failed to allocate memory for devres\n"); + goto err0; + } + + spin_lock_irqsave(&phy_lock, flags); + + phy = __of_usb_find_phy(node); + if (IS_ERR(phy)) { + devres_free(ptr); + goto err1; + } + + if (!try_module_get(phy->dev->driver->owner)) { + phy = ERR_PTR(-ENODEV); + devres_free(ptr); + goto err1; + } + if (nb) + usb_register_notifier(phy, nb); + ptr->phy = phy; + ptr->nb = nb; + devres_add(dev, ptr); + + get_device(phy->dev); + +err1: + spin_unlock_irqrestore(&phy_lock, flags); + +err0: + + return phy; +} +EXPORT_SYMBOL_GPL(devm_usb_get_phy_by_node); + +/** + * devm_usb_get_phy_by_phandle - find the USB PHY by phandle + * @dev: device that requests this phy + * @phandle: name of the property holding the phy phandle value + * @index: the index of the phy + * + * Returns the phy driver associated with the given phandle value, + * after getting a refcount to it, -ENODEV if there is no such phy or + * -EPROBE_DEFER if there is a phandle to the phy, but the device is + * not yet loaded. While at that, it also associates the device with + * the phy using devres. On driver detach, release function is invoked + * on the devres data, then, devres data is freed. + * + * For use by USB host and peripheral drivers. + */ +struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev, + const char *phandle, u8 index) +{ + struct device_node *node; + struct usb_phy *phy; + + if (!dev->of_node) { + dev_dbg(dev, "device does not have a device node entry\n"); + return ERR_PTR(-EINVAL); + } + + node = of_parse_phandle(dev->of_node, phandle, index); + if (!node) { + dev_dbg(dev, "failed to get %s phandle in %pOF node\n", phandle, + dev->of_node); + return ERR_PTR(-ENODEV); + } + phy = devm_usb_get_phy_by_node(dev, node, NULL); + of_node_put(node); + return phy; +} +EXPORT_SYMBOL_GPL(devm_usb_get_phy_by_phandle); + +/** + * devm_usb_put_phy - release the USB PHY + * @dev: device that wants to release this phy + * @phy: the phy returned by devm_usb_get_phy() + * + * destroys the devres associated with this phy and invokes usb_put_phy + * to release the phy. + * + * For use by USB host and peripheral drivers. + */ +void devm_usb_put_phy(struct device *dev, struct usb_phy *phy) +{ + int r; + + r = devres_destroy(dev, devm_usb_phy_release, devm_usb_phy_match, phy); + dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); +} +EXPORT_SYMBOL_GPL(devm_usb_put_phy); + +/** + * usb_put_phy - release the USB PHY + * @x: the phy returned by usb_get_phy() + * + * Releases a refcount the caller received from usb_get_phy(). + * + * For use by USB host and peripheral drivers. + */ +void usb_put_phy(struct usb_phy *x) +{ + if (x) { + struct module *owner = x->dev->driver->owner; + + put_device(x->dev); + module_put(owner); + } +} +EXPORT_SYMBOL_GPL(usb_put_phy); + +/** + * usb_add_phy: declare the USB PHY + * @x: the USB phy to be used; or NULL + * @type: the type of this PHY + * + * This call is exclusively for use by phy drivers, which + * coordinate the activities of drivers for host and peripheral + * controllers, and in some cases for VBUS current regulation. + */ +int usb_add_phy(struct usb_phy *x, enum usb_phy_type type) +{ + int ret = 0; + unsigned long flags; + struct usb_phy *phy; + + if (x->type != USB_PHY_TYPE_UNDEFINED) { + dev_err(x->dev, "not accepting initialized PHY %s\n", x->label); + return -EINVAL; + } + + usb_charger_init(x); + ret = usb_add_extcon(x); + if (ret) + return ret; + + ATOMIC_INIT_NOTIFIER_HEAD(&x->notifier); + + spin_lock_irqsave(&phy_lock, flags); + + list_for_each_entry(phy, &phy_list, head) { + if (phy->type == type) { + ret = -EBUSY; + dev_err(x->dev, "transceiver type %s already exists\n", + usb_phy_type_string(type)); + goto out; + } + } + + x->type = type; + list_add_tail(&x->head, &phy_list); + +out: + spin_unlock_irqrestore(&phy_lock, flags); + return ret; +} +EXPORT_SYMBOL_GPL(usb_add_phy); + +static struct device_type usb_phy_dev_type = { + .name = "usb_phy", + .uevent = usb_phy_uevent, +}; + +/** + * usb_add_phy_dev - declare the USB PHY + * @x: the USB phy to be used; or NULL + * + * This call is exclusively for use by phy drivers, which + * coordinate the activities of drivers for host and peripheral + * controllers, and in some cases for VBUS current regulation. + */ +int usb_add_phy_dev(struct usb_phy *x) +{ + unsigned long flags; + int ret; + + if (!x->dev) { + dev_err(x->dev, "no device provided for PHY\n"); + return -EINVAL; + } + + usb_charger_init(x); + ret = usb_add_extcon(x); + if (ret) + return ret; + + x->dev->type = &usb_phy_dev_type; + + ATOMIC_INIT_NOTIFIER_HEAD(&x->notifier); + + spin_lock_irqsave(&phy_lock, flags); + list_add_tail(&x->head, &phy_list); + spin_unlock_irqrestore(&phy_lock, flags); + + return 0; +} +EXPORT_SYMBOL_GPL(usb_add_phy_dev); + +/** + * usb_remove_phy - remove the OTG PHY + * @x: the USB OTG PHY to be removed; + * + * This reverts the effects of usb_add_phy + */ +void usb_remove_phy(struct usb_phy *x) +{ + unsigned long flags; + + spin_lock_irqsave(&phy_lock, flags); + if (x) + list_del(&x->head); + spin_unlock_irqrestore(&phy_lock, flags); +} +EXPORT_SYMBOL_GPL(usb_remove_phy); + +/** + * usb_phy_set_event - set event to phy event + * @x: the phy returned by usb_get_phy(); + * @event: event to set + * + * This sets event to phy event + */ +void usb_phy_set_event(struct usb_phy *x, unsigned long event) +{ + x->last_event = event; +} +EXPORT_SYMBOL_GPL(usb_phy_set_event); |