diff options
Diffstat (limited to 'drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c')
| -rw-r--r-- | drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c | 453 |
1 files changed, 453 insertions, 0 deletions
diff --git a/drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c b/drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c new file mode 100644 index 0000000000..4c10cafded --- /dev/null +++ b/drivers/phy/broadcom/phy-brcm-usb-init-synopsys.c @@ -0,0 +1,453 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2018, Broadcom */ + +/* + * This module contains USB PHY initialization for power up and S3 resume + * for newer Synopsys based USB hardware first used on the bcm7216. + */ + +#include <linux/delay.h> +#include <linux/io.h> + +#include <linux/soc/brcmstb/brcmstb.h> +#include "phy-brcm-usb-init.h" + +#define PHY_LOCK_TIMEOUT_MS 200 + +/* Register definitions for syscon piarbctl registers */ +#define PIARBCTL_CAM 0x00 +#define PIARBCTL_SPLITTER 0x04 +#define PIARBCTL_MISC 0x08 +#define PIARBCTL_MISC_SATA_PRIORITY_MASK GENMASK(3, 0) +#define PIARBCTL_MISC_CAM0_MEM_PAGE_MASK GENMASK(7, 4) +#define PIARBCTL_MISC_CAM1_MEM_PAGE_MASK GENMASK(11, 8) +#define PIARBCTL_MISC_USB_MEM_PAGE_MASK GENMASK(15, 12) +#define PIARBCTL_MISC_USB_PRIORITY_MASK GENMASK(19, 16) +#define PIARBCTL_MISC_USB_4G_SDRAM_MASK BIT(29) +#define PIARBCTL_MISC_USB_SELECT_MASK BIT(30) +#define PIARBCTL_MISC_SECURE_MASK BIT(31) + +#define PIARBCTL_MISC_USB_ONLY_MASK \ + (PIARBCTL_MISC_USB_SELECT_MASK | \ + PIARBCTL_MISC_USB_4G_SDRAM_MASK | \ + PIARBCTL_MISC_USB_PRIORITY_MASK | \ + PIARBCTL_MISC_USB_MEM_PAGE_MASK) + +/* Register definitions for the USB CTRL block */ +#define USB_CTRL_SETUP 0x00 +#define USB_CTRL_SETUP_IOC_MASK BIT(4) +#define USB_CTRL_SETUP_IPP_MASK BIT(5) +#define USB_CTRL_SETUP_SOFT_SHUTDOWN_MASK BIT(9) +#define USB_CTRL_SETUP_SCB1_EN_MASK BIT(14) +#define USB_CTRL_SETUP_SCB2_EN_MASK BIT(15) +#define USB_CTRL_SETUP_tca_drv_sel_MASK BIT(24) +#define USB_CTRL_SETUP_STRAP_IPP_SEL_MASK BIT(25) +#define USB_CTRL_USB_PM 0x04 +#define USB_CTRL_USB_PM_XHC_S2_CLK_SWITCH_EN_MASK BIT(3) +#define USB_CTRL_USB_PM_XHC_PME_EN_MASK BIT(4) +#define USB_CTRL_USB_PM_XHC_SOFT_RESETB_MASK BIT(22) +#define USB_CTRL_USB_PM_BDC_SOFT_RESETB_MASK BIT(23) +#define USB_CTRL_USB_PM_SOFT_RESET_MASK BIT(30) +#define USB_CTRL_USB_PM_USB_PWRDN_MASK BIT(31) +#define USB_CTRL_USB_PM_STATUS 0x08 +#define USB_CTRL_USB_DEVICE_CTL1 0x10 +#define USB_CTRL_USB_DEVICE_CTL1_PORT_MODE_MASK GENMASK(1, 0) +#define USB_CTRL_TEST_PORT_CTL 0x30 +#define USB_CTRL_TEST_PORT_CTL_TPOUT_SEL_MASK GENMASK(7, 0) +#define USB_CTRL_TEST_PORT_CTL_TPOUT_SEL_PME_GEN_MASK 0x0000002e +#define USB_CTRL_TP_DIAG1 0x34 +#define USB_CTLR_TP_DIAG1_wake_MASK BIT(1) +#define USB_CTRL_CTLR_CSHCR 0x50 +#define USB_CTRL_CTLR_CSHCR_ctl_pme_en_MASK BIT(18) +#define USB_CTRL_P0_U2PHY_CFG1 0x68 +#define USB_CTRL_P0_U2PHY_CFG1_COMMONONN_MASK BIT(10) + +/* Register definitions for the USB_PHY block in 7211b0 */ +#define USB_PHY_PLL_CTL 0x00 +#define USB_PHY_PLL_CTL_PLL_SUSPEND_MASK BIT(27) +#define USB_PHY_PLL_CTL_PLL_RESETB_MASK BIT(30) +#define USB_PHY_PLL_LDO_CTL 0x08 +#define USB_PHY_PLL_LDO_CTL_AFE_BG_PWRDWNB_MASK BIT(0) +#define USB_PHY_PLL_LDO_CTL_AFE_LDO_PWRDWNB_MASK BIT(1) +#define USB_PHY_PLL_LDO_CTL_AFE_CORERDY_MASK BIT(2) +#define USB_PHY_UTMI_CTL_1 0x04 +#define USB_PHY_UTMI_CTL_1_PHY_MODE_MASK GENMASK(3, 2) +#define USB_PHY_UTMI_CTL_1_PHY_MODE_SHIFT 2 +#define USB_PHY_UTMI_CTL_1_POWER_UP_FSM_EN_MASK BIT(11) +#define USB_PHY_IDDQ 0x1c +#define USB_PHY_IDDQ_phy_iddq_MASK BIT(0) +#define USB_PHY_STATUS 0x20 +#define USB_PHY_STATUS_pll_lock_MASK BIT(0) + +/* Register definitions for the MDIO registers in the DWC2 block of + * the 7211b0. + * NOTE: The PHY's MDIO registers are only accessible through the + * legacy DesignWare USB controller even though it's not being used. + */ +#define USB_GMDIOCSR 0 +#define USB_GMDIOGEN 4 + +/* Register definitions for the BDC EC block in 7211b0 */ +#define BDC_EC_AXIRDA 0x0c +#define BDC_EC_AXIRDA_RTS_MASK GENMASK(31, 28) +#define BDC_EC_AXIRDA_RTS_SHIFT 28 + +#define USB_XHCI_GBL_GUSB2PHYCFG 0x100 +#define USB_XHCI_GBL_GUSB2PHYCFG_U2_FREECLK_EXISTS_MASK BIT(30) + +static void usb_mdio_write_7211b0(struct brcm_usb_init_params *params, + uint8_t addr, uint16_t data) +{ + void __iomem *usb_mdio = params->regs[BRCM_REGS_USB_MDIO]; + + addr &= 0x1f; /* 5-bit address */ + brcm_usb_writel(0xffffffff, usb_mdio + USB_GMDIOGEN); + while (brcm_usb_readl(usb_mdio + USB_GMDIOCSR) & (1<<31)) + ; + brcm_usb_writel(0x59020000 | (addr << 18) | data, + usb_mdio + USB_GMDIOGEN); + while (brcm_usb_readl(usb_mdio + USB_GMDIOCSR) & (1<<31)) + ; + brcm_usb_writel(0x00000000, usb_mdio + USB_GMDIOGEN); + while (brcm_usb_readl(usb_mdio + USB_GMDIOCSR) & (1<<31)) + ; +} + +static uint16_t __maybe_unused usb_mdio_read_7211b0( + struct brcm_usb_init_params *params, uint8_t addr) +{ + void __iomem *usb_mdio = params->regs[BRCM_REGS_USB_MDIO]; + + addr &= 0x1f; /* 5-bit address */ + brcm_usb_writel(0xffffffff, usb_mdio + USB_GMDIOGEN); + while (brcm_usb_readl(usb_mdio + USB_GMDIOCSR) & (1<<31)) + ; + brcm_usb_writel(0x69020000 | (addr << 18), usb_mdio + USB_GMDIOGEN); + while (brcm_usb_readl(usb_mdio + USB_GMDIOCSR) & (1<<31)) + ; + brcm_usb_writel(0x00000000, usb_mdio + USB_GMDIOGEN); + while (brcm_usb_readl(usb_mdio + USB_GMDIOCSR) & (1<<31)) + ; + return brcm_usb_readl(usb_mdio + USB_GMDIOCSR) & 0xffff; +} + +static void usb2_eye_fix_7211b0(struct brcm_usb_init_params *params) +{ + /* select bank */ + usb_mdio_write_7211b0(params, 0x1f, 0x80a0); + + /* Set the eye */ + usb_mdio_write_7211b0(params, 0x0a, 0xc6a0); +} + +static void xhci_soft_reset(struct brcm_usb_init_params *params, + int on_off) +{ + void __iomem *ctrl = params->regs[BRCM_REGS_CTRL]; + void __iomem *xhci_gbl = params->regs[BRCM_REGS_XHCI_GBL]; + + /* Assert reset */ + if (on_off) { + USB_CTRL_UNSET(ctrl, USB_PM, XHC_SOFT_RESETB); + /* De-assert reset */ + } else { + USB_CTRL_SET(ctrl, USB_PM, XHC_SOFT_RESETB); + /* Required for COMMONONN to be set */ + USB_XHCI_GBL_UNSET(xhci_gbl, GUSB2PHYCFG, U2_FREECLK_EXISTS); + } +} + +static void usb_init_ipp(struct brcm_usb_init_params *params) +{ + void __iomem *ctrl = params->regs[BRCM_REGS_CTRL]; + u32 reg; + u32 orig_reg; + + pr_debug("%s\n", __func__); + + orig_reg = reg = brcm_usb_readl(USB_CTRL_REG(ctrl, SETUP)); + if (params->ipp != 2) + /* override ipp strap pin (if it exits) */ + reg &= ~(USB_CTRL_MASK(SETUP, STRAP_IPP_SEL)); + + /* Override the default OC and PP polarity */ + reg &= ~(USB_CTRL_MASK(SETUP, IPP) | USB_CTRL_MASK(SETUP, IOC)); + if (params->ioc) + reg |= USB_CTRL_MASK(SETUP, IOC); + if (params->ipp == 1) + reg |= USB_CTRL_MASK(SETUP, IPP); + brcm_usb_writel(reg, USB_CTRL_REG(ctrl, SETUP)); + + /* + * If we're changing IPP, make sure power is off long enough + * to turn off any connected devices. + */ + if ((reg ^ orig_reg) & USB_CTRL_MASK(SETUP, IPP)) + msleep(50); +} + +static void syscon_piarbctl_init(struct regmap *rmap) +{ + /* Switch from legacy USB OTG controller to new STB USB controller */ + regmap_update_bits(rmap, PIARBCTL_MISC, PIARBCTL_MISC_USB_ONLY_MASK, + PIARBCTL_MISC_USB_SELECT_MASK | + PIARBCTL_MISC_USB_4G_SDRAM_MASK); +} + +static void usb_init_common(struct brcm_usb_init_params *params) +{ + u32 reg; + void __iomem *ctrl = params->regs[BRCM_REGS_CTRL]; + + pr_debug("%s\n", __func__); + + if (USB_CTRL_MASK(USB_DEVICE_CTL1, PORT_MODE)) { + reg = brcm_usb_readl(USB_CTRL_REG(ctrl, USB_DEVICE_CTL1)); + reg &= ~USB_CTRL_MASK(USB_DEVICE_CTL1, PORT_MODE); + reg |= params->port_mode; + brcm_usb_writel(reg, USB_CTRL_REG(ctrl, USB_DEVICE_CTL1)); + } + switch (params->supported_port_modes) { + case USB_CTLR_MODE_HOST: + USB_CTRL_UNSET(ctrl, USB_PM, BDC_SOFT_RESETB); + break; + default: + USB_CTRL_UNSET(ctrl, USB_PM, BDC_SOFT_RESETB); + USB_CTRL_SET(ctrl, USB_PM, BDC_SOFT_RESETB); + break; + } +} + +static void usb_wake_enable_7211b0(struct brcm_usb_init_params *params, + bool enable) +{ + void __iomem *ctrl = params->regs[BRCM_REGS_CTRL]; + + if (enable) + USB_CTRL_SET(ctrl, CTLR_CSHCR, ctl_pme_en); + else + USB_CTRL_UNSET(ctrl, CTLR_CSHCR, ctl_pme_en); +} + +static void usb_wake_enable_7216(struct brcm_usb_init_params *params, + bool enable) +{ + void __iomem *ctrl = params->regs[BRCM_REGS_CTRL]; + + if (enable) + USB_CTRL_SET(ctrl, USB_PM, XHC_PME_EN); + else + USB_CTRL_UNSET(ctrl, USB_PM, XHC_PME_EN); +} + +static void usb_init_common_7211b0(struct brcm_usb_init_params *params) +{ + void __iomem *ctrl = params->regs[BRCM_REGS_CTRL]; + void __iomem *usb_phy = params->regs[BRCM_REGS_USB_PHY]; + void __iomem *bdc_ec = params->regs[BRCM_REGS_BDC_EC]; + int timeout_ms = PHY_LOCK_TIMEOUT_MS; + u32 reg; + + if (params->syscon_piarbctl) + syscon_piarbctl_init(params->syscon_piarbctl); + + USB_CTRL_UNSET(ctrl, USB_PM, USB_PWRDN); + + usb_wake_enable_7211b0(params, false); + if (!params->wake_enabled) { + + /* undo possible suspend settings */ + brcm_usb_writel(0, usb_phy + USB_PHY_IDDQ); + reg = brcm_usb_readl(usb_phy + USB_PHY_PLL_CTL); + reg |= USB_PHY_PLL_CTL_PLL_RESETB_MASK; + brcm_usb_writel(reg, usb_phy + USB_PHY_PLL_CTL); + + /* temporarily enable FSM so PHY comes up properly */ + reg = brcm_usb_readl(usb_phy + USB_PHY_UTMI_CTL_1); + reg |= USB_PHY_UTMI_CTL_1_POWER_UP_FSM_EN_MASK; + brcm_usb_writel(reg, usb_phy + USB_PHY_UTMI_CTL_1); + } + + /* Disable PLL auto suspend */ + reg = brcm_usb_readl(usb_phy + USB_PHY_PLL_CTL); + reg |= USB_PHY_PLL_CTL_PLL_SUSPEND_MASK; + brcm_usb_writel(reg, usb_phy + USB_PHY_PLL_CTL); + + /* Init the PHY */ + reg = USB_PHY_PLL_LDO_CTL_AFE_CORERDY_MASK | + USB_PHY_PLL_LDO_CTL_AFE_LDO_PWRDWNB_MASK | + USB_PHY_PLL_LDO_CTL_AFE_BG_PWRDWNB_MASK; + brcm_usb_writel(reg, usb_phy + USB_PHY_PLL_LDO_CTL); + + /* wait for lock */ + while (timeout_ms-- > 0) { + reg = brcm_usb_readl(usb_phy + USB_PHY_STATUS); + if (reg & USB_PHY_STATUS_pll_lock_MASK) + break; + usleep_range(1000, 2000); + } + + /* Set the PHY_MODE */ + reg = brcm_usb_readl(usb_phy + USB_PHY_UTMI_CTL_1); + reg &= ~USB_PHY_UTMI_CTL_1_PHY_MODE_MASK; + reg |= params->supported_port_modes << USB_PHY_UTMI_CTL_1_PHY_MODE_SHIFT; + brcm_usb_writel(reg, usb_phy + USB_PHY_UTMI_CTL_1); + + usb_init_common(params); + + /* + * The BDC controller will get occasional failures with + * the default "Read Transaction Size" of 6 (1024 bytes). + * Set it to 4 (256 bytes). + */ + if ((params->supported_port_modes != USB_CTLR_MODE_HOST) && bdc_ec) { + reg = brcm_usb_readl(bdc_ec + BDC_EC_AXIRDA); + reg &= ~BDC_EC_AXIRDA_RTS_MASK; + reg |= (0x4 << BDC_EC_AXIRDA_RTS_SHIFT); + brcm_usb_writel(reg, bdc_ec + BDC_EC_AXIRDA); + } + + /* + * Disable FSM, otherwise the PHY will auto suspend when no + * device is connected and will be reset on resume. + */ + reg = brcm_usb_readl(usb_phy + USB_PHY_UTMI_CTL_1); + reg &= ~USB_PHY_UTMI_CTL_1_POWER_UP_FSM_EN_MASK; + brcm_usb_writel(reg, usb_phy + USB_PHY_UTMI_CTL_1); + + usb2_eye_fix_7211b0(params); +} + +static void usb_init_common_7216(struct brcm_usb_init_params *params) +{ + void __iomem *ctrl = params->regs[BRCM_REGS_CTRL]; + + USB_CTRL_UNSET(ctrl, USB_PM, XHC_S2_CLK_SWITCH_EN); + USB_CTRL_UNSET(ctrl, USB_PM, USB_PWRDN); + + /* 1 millisecond - for USB clocks to settle down */ + usleep_range(1000, 2000); + + /* Disable PHY when port is suspended */ + USB_CTRL_SET(ctrl, P0_U2PHY_CFG1, COMMONONN); + + usb_wake_enable_7216(params, false); + usb_init_common(params); +} + +static void usb_init_xhci(struct brcm_usb_init_params *params) +{ + pr_debug("%s\n", __func__); + + xhci_soft_reset(params, 0); +} + +static void usb_uninit_common_7216(struct brcm_usb_init_params *params) +{ + void __iomem *ctrl = params->regs[BRCM_REGS_CTRL]; + + pr_debug("%s\n", __func__); + + if (params->wake_enabled) { + /* Switch to using slower clock during suspend to save power */ + USB_CTRL_SET(ctrl, USB_PM, XHC_S2_CLK_SWITCH_EN); + usb_wake_enable_7216(params, true); + } else { + USB_CTRL_SET(ctrl, USB_PM, USB_PWRDN); + } +} + +static void usb_uninit_common_7211b0(struct brcm_usb_init_params *params) +{ + void __iomem *ctrl = params->regs[BRCM_REGS_CTRL]; + void __iomem *usb_phy = params->regs[BRCM_REGS_USB_PHY]; + u32 reg; + + pr_debug("%s\n", __func__); + + if (params->wake_enabled) { + USB_CTRL_SET(ctrl, TEST_PORT_CTL, TPOUT_SEL_PME_GEN); + usb_wake_enable_7211b0(params, true); + } else { + USB_CTRL_SET(ctrl, USB_PM, USB_PWRDN); + brcm_usb_writel(0, usb_phy + USB_PHY_PLL_LDO_CTL); + reg = brcm_usb_readl(usb_phy + USB_PHY_PLL_CTL); + reg &= ~USB_PHY_PLL_CTL_PLL_RESETB_MASK; + brcm_usb_writel(reg, usb_phy + USB_PHY_PLL_CTL); + brcm_usb_writel(USB_PHY_IDDQ_phy_iddq_MASK, + usb_phy + USB_PHY_IDDQ); + } + +} + +static void usb_uninit_xhci(struct brcm_usb_init_params *params) +{ + + pr_debug("%s\n", __func__); + + if (!params->wake_enabled) + xhci_soft_reset(params, 1); +} + +static int usb_get_dual_select(struct brcm_usb_init_params *params) +{ + void __iomem *ctrl = params->regs[BRCM_REGS_CTRL]; + u32 reg = 0; + + pr_debug("%s\n", __func__); + + reg = brcm_usb_readl(USB_CTRL_REG(ctrl, USB_DEVICE_CTL1)); + reg &= USB_CTRL_MASK(USB_DEVICE_CTL1, PORT_MODE); + return reg; +} + +static void usb_set_dual_select(struct brcm_usb_init_params *params) +{ + void __iomem *ctrl = params->regs[BRCM_REGS_CTRL]; + u32 reg; + + pr_debug("%s\n", __func__); + + reg = brcm_usb_readl(USB_CTRL_REG(ctrl, USB_DEVICE_CTL1)); + reg &= ~USB_CTRL_MASK(USB_DEVICE_CTL1, PORT_MODE); + reg |= params->port_mode; + brcm_usb_writel(reg, USB_CTRL_REG(ctrl, USB_DEVICE_CTL1)); +} + +static const struct brcm_usb_init_ops bcm7216_ops = { + .init_ipp = usb_init_ipp, + .init_common = usb_init_common_7216, + .init_xhci = usb_init_xhci, + .uninit_common = usb_uninit_common_7216, + .uninit_xhci = usb_uninit_xhci, + .get_dual_select = usb_get_dual_select, + .set_dual_select = usb_set_dual_select, +}; + +static const struct brcm_usb_init_ops bcm7211b0_ops = { + .init_ipp = usb_init_ipp, + .init_common = usb_init_common_7211b0, + .init_xhci = usb_init_xhci, + .uninit_common = usb_uninit_common_7211b0, + .uninit_xhci = usb_uninit_xhci, + .get_dual_select = usb_get_dual_select, + .set_dual_select = usb_set_dual_select, +}; + +void brcm_usb_dvr_init_7216(struct brcm_usb_init_params *params) +{ + + pr_debug("%s\n", __func__); + + params->family_name = "7216"; + params->ops = &bcm7216_ops; +} + +void brcm_usb_dvr_init_7211b0(struct brcm_usb_init_params *params) +{ + + pr_debug("%s\n", __func__); + + params->family_name = "7211"; + params->ops = &bcm7211b0_ops; +} |