From: Anji jonnala <anjir@xxxxxxxxxxxxxx>
Signed-off-by: Anji jonnala <anjir@xxxxxxxxxxxxxx>
Signed-off-by: Pavankumar Kondeti <pkondeti@xxxxxxxxxxxxxx>
---
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 854b7e3..628ba7d 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);
--
Sent by a consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
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