diff options
Diffstat (limited to 'drivers/phy/phy-exynos5-usbdrd.c')
| -rw-r--r-- | drivers/phy/phy-exynos5-usbdrd.c | 676 |
1 files changed, 676 insertions, 0 deletions
diff --git a/drivers/phy/phy-exynos5-usbdrd.c b/drivers/phy/phy-exynos5-usbdrd.c new file mode 100644 index 00000000000..76d862b2202 --- /dev/null +++ b/drivers/phy/phy-exynos5-usbdrd.c @@ -0,0 +1,676 @@ +/* + * Samsung EXYNOS5 SoC series USB DRD PHY driver + * + * Phy provider for USB 3.0 DRD controller on Exynos5 SoC series + * + * Copyright (C) 2014 Samsung Electronics Co., Ltd. + * Author: Vivek Gautam <gautam.vivek@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/phy/phy.h> +#include <linux/platform_device.h> +#include <linux/mutex.h> +#include <linux/mfd/syscon.h> +#include <linux/mfd/syscon/exynos5-pmu.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> + +/* Exynos USB PHY registers */ +#define EXYNOS5_FSEL_9MHZ6 0x0 +#define EXYNOS5_FSEL_10MHZ 0x1 +#define EXYNOS5_FSEL_12MHZ 0x2 +#define EXYNOS5_FSEL_19MHZ2 0x3 +#define EXYNOS5_FSEL_20MHZ 0x4 +#define EXYNOS5_FSEL_24MHZ 0x5 +#define EXYNOS5_FSEL_50MHZ 0x7 + +/* EXYNOS5: USB 3.0 DRD PHY registers */ +#define EXYNOS5_DRD_LINKSYSTEM 0x04 + +#define LINKSYSTEM_FLADJ_MASK (0x3f << 1) +#define LINKSYSTEM_FLADJ(_x) ((_x) << 1) +#define LINKSYSTEM_XHCI_VERSION_CONTROL BIT(27) + +#define EXYNOS5_DRD_PHYUTMI 0x08 + +#define PHYUTMI_OTGDISABLE BIT(6) +#define PHYUTMI_FORCESUSPEND BIT(1) +#define PHYUTMI_FORCESLEEP BIT(0) + +#define EXYNOS5_DRD_PHYPIPE 0x0c + +#define EXYNOS5_DRD_PHYCLKRST 0x10 + +#define PHYCLKRST_EN_UTMISUSPEND BIT(31) + +#define PHYCLKRST_SSC_REFCLKSEL_MASK (0xff << 23) +#define PHYCLKRST_SSC_REFCLKSEL(_x) ((_x) << 23) + +#define PHYCLKRST_SSC_RANGE_MASK (0x03 << 21) +#define PHYCLKRST_SSC_RANGE(_x) ((_x) << 21) + +#define PHYCLKRST_SSC_EN BIT(20) +#define PHYCLKRST_REF_SSP_EN BIT(19) +#define PHYCLKRST_REF_CLKDIV2 BIT(18) + +#define PHYCLKRST_MPLL_MULTIPLIER_MASK (0x7f << 11) +#define PHYCLKRST_MPLL_MULTIPLIER_100MHZ_REF (0x19 << 11) +#define PHYCLKRST_MPLL_MULTIPLIER_50M_REF (0x32 << 11) +#define PHYCLKRST_MPLL_MULTIPLIER_24MHZ_REF (0x68 << 11) +#define PHYCLKRST_MPLL_MULTIPLIER_20MHZ_REF (0x7d << 11) +#define PHYCLKRST_MPLL_MULTIPLIER_19200KHZ_REF (0x02 << 11) + +#define PHYCLKRST_FSEL_UTMI_MASK (0x7 << 5) +#define PHYCLKRST_FSEL_PIPE_MASK (0x7 << 8) +#define PHYCLKRST_FSEL(_x) ((_x) << 5) +#define PHYCLKRST_FSEL_PAD_100MHZ (0x27 << 5) +#define PHYCLKRST_FSEL_PAD_24MHZ (0x2a << 5) +#define PHYCLKRST_FSEL_PAD_20MHZ (0x31 << 5) +#define PHYCLKRST_FSEL_PAD_19_2MHZ (0x38 << 5) + +#define PHYCLKRST_RETENABLEN BIT(4) + +#define PHYCLKRST_REFCLKSEL_MASK (0x03 << 2) +#define PHYCLKRST_REFCLKSEL_PAD_REFCLK (0x2 << 2) +#define PHYCLKRST_REFCLKSEL_EXT_REFCLK (0x3 << 2) + +#define PHYCLKRST_PORTRESET BIT(1) +#define PHYCLKRST_COMMONONN BIT(0) + +#define EXYNOS5_DRD_PHYREG0 0x14 +#define EXYNOS5_DRD_PHYREG1 0x18 + +#define EXYNOS5_DRD_PHYPARAM0 0x1c + +#define PHYPARAM0_REF_USE_PAD BIT(31) +#define PHYPARAM0_REF_LOSLEVEL_MASK (0x1f << 26) +#define PHYPARAM0_REF_LOSLEVEL (0x9 << 26) + +#define EXYNOS5_DRD_PHYPARAM1 0x20 + +#define PHYPARAM1_PCS_TXDEEMPH_MASK (0x1f << 0) +#define PHYPARAM1_PCS_TXDEEMPH (0x1c) + +#define EXYNOS5_DRD_PHYTERM 0x24 + +#define EXYNOS5_DRD_PHYTEST 0x28 + +#define PHYTEST_POWERDOWN_SSP BIT(3) +#define PHYTEST_POWERDOWN_HSP BIT(2) + +#define EXYNOS5_DRD_PHYADP 0x2c + +#define EXYNOS5_DRD_PHYUTMICLKSEL 0x30 + +#define PHYUTMICLKSEL_UTMI_CLKSEL BIT(2) + +#define EXYNOS5_DRD_PHYRESUME 0x34 +#define EXYNOS5_DRD_LINKPORT 0x44 + +#define KHZ 1000 +#define MHZ (KHZ * KHZ) + +enum exynos5_usbdrd_phy_id { + EXYNOS5_DRDPHY_UTMI, + EXYNOS5_DRDPHY_PIPE3, + EXYNOS5_DRDPHYS_NUM, +}; + +struct phy_usb_instance; +struct exynos5_usbdrd_phy; + +struct exynos5_usbdrd_phy_config { + u32 id; + void (*phy_isol)(struct phy_usb_instance *inst, u32 on); + void (*phy_init)(struct exynos5_usbdrd_phy *phy_drd); + unsigned int (*set_refclk)(struct phy_usb_instance *inst); +}; + +struct exynos5_usbdrd_phy_drvdata { + const struct exynos5_usbdrd_phy_config *phy_cfg; + u32 pmu_offset_usbdrd0_phy; + u32 pmu_offset_usbdrd1_phy; +}; + +/** + * struct exynos5_usbdrd_phy - driver data for USB 3.0 PHY + * @dev: pointer to device instance of this platform device + * @reg_phy: usb phy controller register memory base + * @clk: phy clock for register access + * @drv_data: pointer to SoC level driver data structure + * @phys[]: array for 'EXYNOS5_DRDPHYS_NUM' number of PHY + * instances each with its 'phy' and 'phy_cfg'. + * @extrefclk: frequency select settings when using 'separate + * reference clocks' for SS and HS operations + * @ref_clk: reference clock to PHY block from which PHY's + * operational clocks are derived + * @ref_rate: rate of above reference clock + */ +struct exynos5_usbdrd_phy { + struct device *dev; + void __iomem *reg_phy; + struct clk *clk; + const struct exynos5_usbdrd_phy_drvdata *drv_data; + struct phy_usb_instance { + struct phy *phy; + u32 index; + struct regmap *reg_pmu; + u32 pmu_offset; + const struct exynos5_usbdrd_phy_config *phy_cfg; + } phys[EXYNOS5_DRDPHYS_NUM]; + u32 extrefclk; + struct clk *ref_clk; + struct regulator *vbus; +}; + +static inline +struct exynos5_usbdrd_phy *to_usbdrd_phy(struct phy_usb_instance *inst) +{ + return container_of((inst), struct exynos5_usbdrd_phy, + phys[(inst)->index]); +} + +/* + * exynos5_rate_to_clk() converts the supplied clock rate to the value that + * can be written to the phy register. + */ +static unsigned int exynos5_rate_to_clk(unsigned long rate, u32 *reg) +{ + /* EXYNOS5_FSEL_MASK */ + + switch (rate) { + case 9600 * KHZ: + *reg = EXYNOS5_FSEL_9MHZ6; + break; + case 10 * MHZ: + *reg = EXYNOS5_FSEL_10MHZ; + break; + case 12 * MHZ: + *reg = EXYNOS5_FSEL_12MHZ; + break; + case 19200 * KHZ: + *reg = EXYNOS5_FSEL_19MHZ2; + break; + case 20 * MHZ: + *reg = EXYNOS5_FSEL_20MHZ; + break; + case 24 * MHZ: + *reg = EXYNOS5_FSEL_24MHZ; + break; + case 50 * MHZ: + *reg = EXYNOS5_FSEL_50MHZ; + break; + default: + return -EINVAL; + } + + return 0; +} + +static void exynos5_usbdrd_phy_isol(struct phy_usb_instance *inst, + unsigned int on) +{ + unsigned int val; + + if (!inst->reg_pmu) + return; + + val = on ? 0 : EXYNOS5_PHY_ENABLE; + + regmap_update_bits(inst->reg_pmu, inst->pmu_offset, + EXYNOS5_PHY_ENABLE, val); +} + +/* + * Sets the pipe3 phy's clk as EXTREFCLK (XXTI) which is internal clock + * from clock core. Further sets multiplier values and spread spectrum + * clock settings for SuperSpeed operations. + */ +static unsigned int +exynos5_usbdrd_pipe3_set_refclk(struct phy_usb_instance *inst) +{ + static u32 reg; + struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst); + + /* restore any previous reference clock settings */ + reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST); + + /* Use EXTREFCLK as ref clock */ + reg &= ~PHYCLKRST_REFCLKSEL_MASK; + reg |= PHYCLKRST_REFCLKSEL_EXT_REFCLK; + + /* FSEL settings corresponding to reference clock */ + reg &= ~PHYCLKRST_FSEL_PIPE_MASK | + PHYCLKRST_MPLL_MULTIPLIER_MASK | + PHYCLKRST_SSC_REFCLKSEL_MASK; + switch (phy_drd->extrefclk) { + case EXYNOS5_FSEL_50MHZ: + reg |= (PHYCLKRST_MPLL_MULTIPLIER_50M_REF | + PHYCLKRST_SSC_REFCLKSEL(0x00)); + break; + case EXYNOS5_FSEL_24MHZ: + reg |= (PHYCLKRST_MPLL_MULTIPLIER_24MHZ_REF | + PHYCLKRST_SSC_REFCLKSEL(0x88)); + break; + case EXYNOS5_FSEL_20MHZ: + reg |= (PHYCLKRST_MPLL_MULTIPLIER_20MHZ_REF | + PHYCLKRST_SSC_REFCLKSEL(0x00)); + break; + case EXYNOS5_FSEL_19MHZ2: + reg |= (PHYCLKRST_MPLL_MULTIPLIER_19200KHZ_REF | + PHYCLKRST_SSC_REFCLKSEL(0x88)); + break; + default: + dev_dbg(phy_drd->dev, "unsupported ref clk\n"); + break; + } + + return reg; +} + +/* + * Sets the utmi phy's clk as EXTREFCLK (XXTI) which is internal clock + * from clock core. Further sets the FSEL values for HighSpeed operations. + */ +static unsigned int +exynos5_usbdrd_utmi_set_refclk(struct phy_usb_instance *inst) +{ + static u32 reg; + struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst); + + /* restore any previous reference clock settings */ + reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST); + + reg &= ~PHYCLKRST_REFCLKSEL_MASK; + reg |= PHYCLKRST_REFCLKSEL_EXT_REFCLK; + + reg &= ~PHYCLKRST_FSEL_UTMI_MASK | + PHYCLKRST_MPLL_MULTIPLIER_MASK | + PHYCLKRST_SSC_REFCLKSEL_MASK; + reg |= PHYCLKRST_FSEL(phy_drd->extrefclk); + + return reg; +} + +static void exynos5_usbdrd_pipe3_init(struct exynos5_usbdrd_phy *phy_drd) +{ + u32 reg; + + reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM1); + /* Set Tx De-Emphasis level */ + reg &= ~PHYPARAM1_PCS_TXDEEMPH_MASK; + reg |= PHYPARAM1_PCS_TXDEEMPH; + writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM1); + + reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST); + reg &= ~PHYTEST_POWERDOWN_SSP; + writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST); +} + +static void exynos5_usbdrd_utmi_init(struct exynos5_usbdrd_phy *phy_drd) +{ + u32 reg; + + reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM0); + /* Set Loss-of-Signal Detector sensitivity */ + reg &= ~PHYPARAM0_REF_LOSLEVEL_MASK; + reg |= PHYPARAM0_REF_LOSLEVEL; + writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM0); + + reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM1); + /* Set Tx De-Emphasis level */ + reg &= ~PHYPARAM1_PCS_TXDEEMPH_MASK; + reg |= PHYPARAM1_PCS_TXDEEMPH; + writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM1); + + /* UTMI Power Control */ + writel(PHYUTMI_OTGDISABLE, phy_drd->reg_phy + EXYNOS5_DRD_PHYUTMI); + + reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST); + reg &= ~PHYTEST_POWERDOWN_HSP; + writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST); +} + +static int exynos5_usbdrd_phy_init(struct phy *phy) +{ + int ret; + u32 reg; + struct phy_usb_instance *inst = phy_get_drvdata(phy); + struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst); + + ret = clk_prepare_enable(phy_drd->clk); + if (ret) + return ret; + + /* Reset USB 3.0 PHY */ + writel(0x0, phy_drd->reg_phy + EXYNOS5_DRD_PHYREG0); + writel(0x0, phy_drd->reg_phy + EXYNOS5_DRD_PHYRESUME); + + /* + * Setting the Frame length Adj value[6:1] to default 0x20 + * See xHCI 1.0 spec, 5.2.4 + */ + reg = LINKSYSTEM_XHCI_VERSION_CONTROL | + LINKSYSTEM_FLADJ(0x20); + writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_LINKSYSTEM); + + reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM0); + /* Select PHY CLK source */ + reg &= ~PHYPARAM0_REF_USE_PAD; + writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM0); + + /* This bit must be set for both HS and SS operations */ + reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYUTMICLKSEL); + reg |= PHYUTMICLKSEL_UTMI_CLKSEL; + writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYUTMICLKSEL); + + /* UTMI or PIPE3 specific init */ + inst->phy_cfg->phy_init(phy_drd); + + /* reference clock settings */ + reg = inst->phy_cfg->set_refclk(inst); + + /* Digital power supply in normal operating mode */ + reg |= PHYCLKRST_RETENABLEN | + /* Enable ref clock for SS function */ + PHYCLKRST_REF_SSP_EN | + /* Enable spread spectrum */ + PHYCLKRST_SSC_EN | + /* Power down HS Bias and PLL blocks in suspend mode */ + PHYCLKRST_COMMONONN | + /* Reset the port */ + PHYCLKRST_PORTRESET; + + writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST); + + udelay(10); + + reg &= ~PHYCLKRST_PORTRESET; + writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST); + + clk_disable_unprepare(phy_drd->clk); + + return 0; +} + +static int exynos5_usbdrd_phy_exit(struct phy *phy) +{ + int ret; + u32 reg; + struct phy_usb_instance *inst = phy_get_drvdata(phy); + struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst); + + ret = clk_prepare_enable(phy_drd->clk); + if (ret) + return ret; + + reg = PHYUTMI_OTGDISABLE | + PHYUTMI_FORCESUSPEND | + PHYUTMI_FORCESLEEP; + writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYUTMI); + + /* Resetting the PHYCLKRST enable bits to reduce leakage current */ + reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST); + reg &= ~(PHYCLKRST_REF_SSP_EN | + PHYCLKRST_SSC_EN | + PHYCLKRST_COMMONONN); + writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST); + + /* Control PHYTEST to remove leakage current */ + reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST); + reg |= PHYTEST_POWERDOWN_SSP | + PHYTEST_POWERDOWN_HSP; + writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST); + + clk_disable_unprepare(phy_drd->clk); + + return 0; +} + +static int exynos5_usbdrd_phy_power_on(struct phy *phy) +{ + int ret; + struct phy_usb_instance *inst = phy_get_drvdata(phy); + struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst); + + dev_dbg(phy_drd->dev, "Request to power_on usbdrd_phy phy\n"); + + clk_prepare_enable(phy_drd->ref_clk); + + /* Enable VBUS supply */ + if (phy_drd->vbus) { + ret = regulator_enable(phy_drd->vbus); + if (ret) { + dev_err(phy_drd->dev, "Failed to enable VBUS supply\n"); + goto fail_vbus; + } + } + + /* Power-on PHY*/ + inst->phy_cfg->phy_isol(inst, 0); + + return 0; + +fail_vbus: + clk_disable_unprepare(phy_drd->ref_clk); + + return ret; +} + +static int exynos5_usbdrd_phy_power_off(struct phy *phy) +{ + struct phy_usb_instance *inst = phy_get_drvdata(phy); + struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst); + + dev_dbg(phy_drd->dev, "Request to power_off usbdrd_phy phy\n"); + + /* Power-off the PHY */ + inst->phy_cfg->phy_isol(inst, 1); + + /* Disable VBUS supply */ + if (phy_drd->vbus) + regulator_disable(phy_drd->vbus); + + clk_disable_unprepare(phy_drd->ref_clk); + + return 0; +} + +static struct phy *exynos5_usbdrd_phy_xlate(struct device *dev, + struct of_phandle_args *args) +{ + struct exynos5_usbdrd_phy *phy_drd = dev_get_drvdata(dev); + + if (WARN_ON(args->args[0] > EXYNOS5_DRDPHYS_NUM)) + return ERR_PTR(-ENODEV); + + return phy_drd->phys[args->args[0]].phy; +} + +static struct phy_ops exynos5_usbdrd_phy_ops = { + .init = exynos5_usbdrd_phy_init, + .exit = exynos5_usbdrd_phy_exit, + .power_on = exynos5_usbdrd_phy_power_on, + .power_off = exynos5_usbdrd_phy_power_off, + .owner = THIS_MODULE, +}; + +const struct exynos5_usbdrd_phy_config phy_cfg_exynos5[] = { + { + .id = EXYNOS5_DRDPHY_UTMI, + .phy_isol = exynos5_usbdrd_phy_isol, + .phy_init = exynos5_usbdrd_utmi_init, + .set_refclk = exynos5_usbdrd_utmi_set_refclk, + }, + { + .id = EXYNOS5_DRDPHY_PIPE3, + .phy_isol = exynos5_usbdrd_phy_isol, + .phy_init = exynos5_usbdrd_pipe3_init, + .set_refclk = exynos5_usbdrd_pipe3_set_refclk, + }, +}; + +const struct exynos5_usbdrd_phy_drvdata exynos5420_usbdrd_phy = { + .phy_cfg = phy_cfg_exynos5, + .pmu_offset_usbdrd0_phy = EXYNOS5_USBDRD_PHY_CONTROL, + .pmu_offset_usbdrd1_phy = EXYNOS5420_USBDRD1_PHY_CONTROL, +}; + +const struct exynos5_usbdrd_phy_drvdata exynos5250_usbdrd_phy = { + .phy_cfg = phy_cfg_exynos5, + .pmu_offset_usbdrd0_phy = EXYNOS5_USBDRD_PHY_CONTROL, +}; + +static const struct of_device_id exynos5_usbdrd_phy_of_match[] = { + { + .compatible = "samsung,exynos5250-usbdrd-phy", + .data = &exynos5250_usbdrd_phy + }, { + .compatible = "samsung,exynos5420-usbdrd-phy", + .data = &exynos5420_usbdrd_phy + }, + { }, +}; + +static int exynos5_usbdrd_phy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *node = dev->of_node; + struct exynos5_usbdrd_phy *phy_drd; + struct phy_provider *phy_provider; + struct resource *res; + const struct of_device_id *match; + const struct exynos5_usbdrd_phy_drvdata *drv_data; + struct regmap *reg_pmu; + u32 pmu_offset; + unsigned long ref_rate; + int i, ret; + int channel; + + phy_drd = devm_kzalloc(dev, sizeof(*phy_drd), GFP_KERNEL); + if (!phy_drd) + return -ENOMEM; + + dev_set_drvdata(dev, phy_drd); + phy_drd->dev = dev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + phy_drd->reg_phy = devm_ioremap_resource(dev, res); + if (IS_ERR(phy_drd->reg_phy)) + return PTR_ERR(phy_drd->reg_phy); + + match = of_match_node(exynos5_usbdrd_phy_of_match, pdev->dev.of_node); + + drv_data = match->data; + phy_drd->drv_data = drv_data; + + phy_drd->clk = devm_clk_get(dev, "phy"); + if (IS_ERR(phy_drd->clk)) { + dev_err(dev, "Failed to get clock of phy controller\n"); + return PTR_ERR(phy_drd->clk); + } + + phy_drd->ref_clk = devm_clk_get(dev, "ref"); + if (IS_ERR(phy_drd->ref_clk)) { + dev_err(dev, "Failed to get reference clock of usbdrd phy\n"); + return PTR_ERR(phy_drd->ref_clk); + } + ref_rate = clk_get_rate(phy_drd->ref_clk); + + ret = exynos5_rate_to_clk(ref_rate, &phy_drd->extrefclk); + if (ret) { + dev_err(phy_drd->dev, "Clock rate (%ld) not supported\n", + ref_rate); + return ret; + } + + reg_pmu = syscon_regmap_lookup_by_phandle(dev->of_node, + "samsung,pmu-syscon"); + if (IS_ERR(reg_pmu)) { + dev_err(dev, "Failed to lookup PMU regmap\n"); + return PTR_ERR(reg_pmu); + } + + /* + * Exynos5420 SoC has multiple channels for USB 3.0 PHY, with + * each having separate power control registers. + * 'channel' facilitates to set such registers. + */ + channel = of_alias_get_id(node, "usbdrdphy"); + if (channel < 0) + dev_dbg(dev, "Not a multi-controller usbdrd phy\n"); + + switch (channel) { + case 1: + pmu_offset = phy_drd->drv_data->pmu_offset_usbdrd1_phy; + break; + case 0: + default: + pmu_offset = phy_drd->drv_data->pmu_offset_usbdrd0_phy; + break; + } + + /* Get Vbus regulator */ + phy_drd->vbus = devm_regulator_get(dev, "vbus"); + if (IS_ERR(phy_drd->vbus)) { + ret = PTR_ERR(phy_drd->vbus); + if (ret == -EPROBE_DEFER) + return ret; + + dev_warn(dev, "Failed to get VBUS supply regulator\n"); + phy_drd->vbus = NULL; + } + + dev_vdbg(dev, "Creating usbdrd_phy phy\n"); + + for (i = 0; i < EXYNOS5_DRDPHYS_NUM; i++) { + struct phy *phy = devm_phy_create(dev, &exynos5_usbdrd_phy_ops, + NULL); + if (IS_ERR(phy)) { + dev_err(dev, "Failed to create usbdrd_phy phy\n"); + return PTR_ERR(phy); + } + + phy_drd->phys[i].phy = phy; + phy_drd->phys[i].index = i; + phy_drd->phys[i].reg_pmu = reg_pmu; + phy_drd->phys[i].pmu_offset = pmu_offset; + phy_drd->phys[i].phy_cfg = &drv_data->phy_cfg[i]; + phy_set_drvdata(phy, &phy_drd->phys[i]); + } + + phy_provider = devm_of_phy_provider_register(dev, + exynos5_usbdrd_phy_xlate); + if (IS_ERR(phy_provider)) { + dev_err(phy_drd->dev, "Failed to register phy provider\n"); + return PTR_ERR(phy_provider); + } + + return 0; +} + +static struct platform_driver exynos5_usb3drd_phy = { + .probe = exynos5_usbdrd_phy_probe, + .driver = { + .of_match_table = exynos5_usbdrd_phy_of_match, + .name = "exynos5_usb3drd_phy", + .owner = THIS_MODULE, + } +}; + +module_platform_driver(exynos5_usb3drd_phy); +MODULE_DESCRIPTION("Samsung EXYNOS5 SoCs USB 3.0 DRD controller PHY driver"); +MODULE_AUTHOR("Vivek Gautam <gautam.vivek@samsung.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:exynos5_usb3drd_phy"); |