diff options
| -rw-r--r-- | drivers/usb/otg/msm_otg.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/drivers/usb/otg/msm_otg.c b/drivers/usb/otg/msm_otg.c index 854b7e3413dd..628ba7d943da 100644 --- a/drivers/usb/otg/msm_otg.c +++ b/drivers/usb/otg/msm_otg.c @@ -38,6 +38,7 @@ #include <linux/usb/hcd.h> #include <linux/usb/msm_hsusb.h> #include <linux/usb/msm_hsusb_hw.h> +#include <linux/regulator/consumer.h> #include <mach/clk.h> @@ -45,6 +46,171 @@ #define DRIVER_NAME "msm_otg" #define ULPI_IO_TIMEOUT_USEC (10 * 1000) + +#define USB_PHY_3P3_VOL_MIN 3050000 /* uV */ +#define USB_PHY_3P3_VOL_MAX 3300000 /* uV */ +#define USB_PHY_3P3_HPM_LOAD 50000 /* uA */ +#define USB_PHY_3P3_LPM_LOAD 4000 /* uA */ + +#define USB_PHY_1P8_VOL_MIN 1800000 /* uV */ +#define USB_PHY_1P8_VOL_MAX 1800000 /* uV */ +#define USB_PHY_1P8_HPM_LOAD 50000 /* uA */ +#define USB_PHY_1P8_LPM_LOAD 4000 /* uA */ + +#define USB_PHY_VDD_DIG_VOL_MIN 1000000 /* uV */ +#define USB_PHY_VDD_DIG_VOL_MAX 1320000 /* uV */ + +static struct regulator *hsusb_3p3; +static struct regulator *hsusb_1p8; +static struct regulator *hsusb_vddcx; + +static int msm_hsusb_init_vddcx(struct msm_otg *motg, int init) +{ + int ret = 0; + + if (init) { + hsusb_vddcx = regulator_get(motg->otg.dev, "HSUSB_VDDCX"); + if (IS_ERR(hsusb_vddcx)) { + dev_err(motg->otg.dev, "unable to get hsusb vddcx\n"); + return PTR_ERR(hsusb_vddcx); + } + + ret = regulator_set_voltage(hsusb_vddcx, + USB_PHY_VDD_DIG_VOL_MIN, + USB_PHY_VDD_DIG_VOL_MAX); + if (ret) { + dev_err(motg->otg.dev, "unable to set the voltage " + "for hsusb vddcx\n"); + regulator_put(hsusb_vddcx); + return ret; + } + + ret = regulator_enable(hsusb_vddcx); + if (ret) { + dev_err(motg->otg.dev, "unable to enable hsusb vddcx\n"); + regulator_put(hsusb_vddcx); + } + } else { + ret = regulator_set_voltage(hsusb_vddcx, 0, + USB_PHY_VDD_DIG_VOL_MIN); + if (ret) { + dev_err(motg->otg.dev, "unable to set the voltage " + "for hsusb vddcx\n"); + return ret; + } + ret = regulator_disable(hsusb_vddcx); + if (ret) + dev_err(motg->otg.dev, "unable to disable hsusb vddcx\n"); + + regulator_put(hsusb_vddcx); + } + + return ret; +} + +static int msm_hsusb_ldo_init(struct msm_otg *motg, int init) +{ + int rc = 0; + + if (init) { + hsusb_3p3 = regulator_get(motg->otg.dev, "HSUSB_3p3"); + if (IS_ERR(hsusb_3p3)) { + dev_err(motg->otg.dev, "unable to get hsusb 3p3\n"); + return PTR_ERR(hsusb_3p3); + } + + rc = regulator_set_voltage(hsusb_3p3, USB_PHY_3P3_VOL_MIN, + USB_PHY_3P3_VOL_MAX); + if (rc) { + dev_err(motg->otg.dev, "unable to set voltage level " + "for hsusb 3p3\n"); + goto put_3p3; + } + rc = regulator_enable(hsusb_3p3); + if (rc) { + dev_err(motg->otg.dev, "unable to enable the hsusb 3p3\n"); + goto put_3p3; + } + hsusb_1p8 = regulator_get(motg->otg.dev, "HSUSB_1p8"); + if (IS_ERR(hsusb_1p8)) { + dev_err(motg->otg.dev, "unable to get hsusb 1p8\n"); + rc = PTR_ERR(hsusb_1p8); + goto disable_3p3; + } + rc = regulator_set_voltage(hsusb_1p8, USB_PHY_1P8_VOL_MIN, + USB_PHY_1P8_VOL_MAX); + if (rc) { + dev_err(motg->otg.dev, "unable to set voltage level " + "for hsusb 1p8\n"); + goto put_1p8; + } + rc = regulator_enable(hsusb_1p8); + if (rc) { + dev_err(motg->otg.dev, "unable to enable the hsusb 1p8\n"); + goto put_1p8; + } + + return 0; + } + + regulator_disable(hsusb_1p8); +put_1p8: + regulator_put(hsusb_1p8); +disable_3p3: + regulator_disable(hsusb_3p3); +put_3p3: + regulator_put(hsusb_3p3); + return rc; +} + +static int msm_hsusb_ldo_set_mode(int on) +{ + int ret = 0; + + if (!hsusb_1p8 || IS_ERR(hsusb_1p8)) { + pr_err("%s: HSUSB_1p8 is not initialized\n", __func__); + return -ENODEV; + } + + if (!hsusb_3p3 || IS_ERR(hsusb_3p3)) { + pr_err("%s: HSUSB_3p3 is not initialized\n", __func__); + return -ENODEV; + } + + if (on) { + ret = regulator_set_optimum_mode(hsusb_1p8, + USB_PHY_1P8_HPM_LOAD); + if (ret < 0) { + pr_err("%s: Unable to set HPM of the regulator " + "HSUSB_1p8\n", __func__); + return ret; + } + ret = regulator_set_optimum_mode(hsusb_3p3, + USB_PHY_3P3_HPM_LOAD); + if (ret < 0) { + pr_err("%s: Unable to set HPM of the regulator " + "HSUSB_3p3\n", __func__); + regulator_set_optimum_mode(hsusb_1p8, + USB_PHY_1P8_LPM_LOAD); + return ret; + } + } else { + ret = regulator_set_optimum_mode(hsusb_1p8, + USB_PHY_1P8_LPM_LOAD); + if (ret < 0) + pr_err("%s: Unable to set LPM of the regulator " + "HSUSB_1p8\n", __func__); + ret = regulator_set_optimum_mode(hsusb_3p3, + USB_PHY_3P3_LPM_LOAD); + if (ret < 0) + pr_err("%s: Unable to set LPM of the regulator " + "HSUSB_3p3\n", __func__); + } + + pr_debug("reg (%s)\n", on ? "HPM" : "LPM"); + return ret < 0 ? ret : 0; +} + static int ulpi_read(struct otg_transceiver *otg, u32 reg) { struct msm_otg *motg = container_of(otg, struct msm_otg, otg); @@ -1297,6 +1463,24 @@ static int __init msm_otg_probe(struct platform_device *pdev) clk_enable(motg->clk); clk_enable(motg->pclk); + + ret = msm_hsusb_init_vddcx(motg, 1); + if (ret) { + dev_err(&pdev->dev, "hsusb vddcx configuration failed\n"); + goto free_regs; + } + + ret = msm_hsusb_ldo_init(motg, 1); + if (ret) { + dev_err(&pdev->dev, "hsusb vreg configuration failed\n"); + goto vddcx_exit; + } + ret = msm_hsusb_ldo_set_mode(1); + if (ret) { + dev_err(&pdev->dev, "hsusb vreg enable failed\n"); + goto ldo_exit; + } + if (motg->core_clk) clk_enable(motg->core_clk); @@ -1345,6 +1529,10 @@ free_irq: disable_clks: clk_disable(motg->pclk); clk_disable(motg->clk); +ldo_exit: + msm_hsusb_ldo_init(motg, 0); +vddcx_exit: + msm_hsusb_init_vddcx(motg, 0); free_regs: iounmap(motg->regs); put_core_clk: @@ -1410,6 +1598,7 @@ static int __devexit msm_otg_remove(struct platform_device *pdev) clk_disable(motg->pclk_src); clk_put(motg->pclk_src); } + msm_hsusb_ldo_init(motg, 0); iounmap(motg->regs); pm_runtime_set_suspended(&pdev->dev); |
