diff options
Diffstat (limited to 'drivers/usb/phy/phy-tegra-usb.c')
| -rw-r--r-- | drivers/usb/phy/phy-tegra-usb.c | 1509 |
1 files changed, 1509 insertions, 0 deletions
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"); |