USB: OTG: msm: Configure PHY Analog and Digital voltage domains

Signed-off-by: Anji jonnala <anjir@codeaurora.org>
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

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);