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>
This commit is contained in:
Anji jonnala
Greg Kroah-Hartman
parent
d860852e08
commit
11aa5c478e
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@ -38,6 +38,7 @@
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#include <linux/usb/hcd.h>
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#include <linux/usb/msm_hsusb.h>
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#include <linux/usb/msm_hsusb_hw.h>
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#include <linux/regulator/consumer.h>
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#include <mach/clk.h>
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@ -45,6 +46,171 @@
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#define DRIVER_NAME "msm_otg"
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#define ULPI_IO_TIMEOUT_USEC (10 * 1000)
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#define USB_PHY_3P3_VOL_MIN 3050000 /* uV */
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#define USB_PHY_3P3_VOL_MAX 3300000 /* uV */
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#define USB_PHY_3P3_HPM_LOAD 50000 /* uA */
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#define USB_PHY_3P3_LPM_LOAD 4000 /* uA */
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#define USB_PHY_1P8_VOL_MIN 1800000 /* uV */
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#define USB_PHY_1P8_VOL_MAX 1800000 /* uV */
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#define USB_PHY_1P8_HPM_LOAD 50000 /* uA */
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#define USB_PHY_1P8_LPM_LOAD 4000 /* uA */
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#define USB_PHY_VDD_DIG_VOL_MIN 1000000 /* uV */
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#define USB_PHY_VDD_DIG_VOL_MAX 1320000 /* uV */
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static struct regulator *hsusb_3p3;
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static struct regulator *hsusb_1p8;
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static struct regulator *hsusb_vddcx;
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static int msm_hsusb_init_vddcx(struct msm_otg *motg, int init)
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{
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int ret = 0;
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if (init) {
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hsusb_vddcx = regulator_get(motg->otg.dev, "HSUSB_VDDCX");
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if (IS_ERR(hsusb_vddcx)) {
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dev_err(motg->otg.dev, "unable to get hsusb vddcx\n");
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return PTR_ERR(hsusb_vddcx);
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}
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ret = regulator_set_voltage(hsusb_vddcx,
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USB_PHY_VDD_DIG_VOL_MIN,
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USB_PHY_VDD_DIG_VOL_MAX);
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if (ret) {
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dev_err(motg->otg.dev, "unable to set the voltage "
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"for hsusb vddcx\n");
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regulator_put(hsusb_vddcx);
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return ret;
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}
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ret = regulator_enable(hsusb_vddcx);
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if (ret) {
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dev_err(motg->otg.dev, "unable to enable hsusb vddcx\n");
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regulator_put(hsusb_vddcx);
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}
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} else {
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ret = regulator_set_voltage(hsusb_vddcx, 0,
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USB_PHY_VDD_DIG_VOL_MIN);
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if (ret) {
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dev_err(motg->otg.dev, "unable to set the voltage "
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"for hsusb vddcx\n");
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return ret;
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}
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ret = regulator_disable(hsusb_vddcx);
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if (ret)
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dev_err(motg->otg.dev, "unable to disable hsusb vddcx\n");
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regulator_put(hsusb_vddcx);
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}
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return ret;
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}
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static int msm_hsusb_ldo_init(struct msm_otg *motg, int init)
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{
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int rc = 0;
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if (init) {
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hsusb_3p3 = regulator_get(motg->otg.dev, "HSUSB_3p3");
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if (IS_ERR(hsusb_3p3)) {
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dev_err(motg->otg.dev, "unable to get hsusb 3p3\n");
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return PTR_ERR(hsusb_3p3);
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}
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rc = regulator_set_voltage(hsusb_3p3, USB_PHY_3P3_VOL_MIN,
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USB_PHY_3P3_VOL_MAX);
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if (rc) {
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dev_err(motg->otg.dev, "unable to set voltage level "
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"for hsusb 3p3\n");
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goto put_3p3;
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}
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rc = regulator_enable(hsusb_3p3);
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if (rc) {
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dev_err(motg->otg.dev, "unable to enable the hsusb 3p3\n");
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goto put_3p3;
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}
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hsusb_1p8 = regulator_get(motg->otg.dev, "HSUSB_1p8");
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if (IS_ERR(hsusb_1p8)) {
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dev_err(motg->otg.dev, "unable to get hsusb 1p8\n");
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rc = PTR_ERR(hsusb_1p8);
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goto disable_3p3;
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}
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rc = regulator_set_voltage(hsusb_1p8, USB_PHY_1P8_VOL_MIN,
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USB_PHY_1P8_VOL_MAX);
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if (rc) {
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dev_err(motg->otg.dev, "unable to set voltage level "
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"for hsusb 1p8\n");
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goto put_1p8;
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}
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rc = regulator_enable(hsusb_1p8);
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if (rc) {
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dev_err(motg->otg.dev, "unable to enable the hsusb 1p8\n");
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goto put_1p8;
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}
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return 0;
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}
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regulator_disable(hsusb_1p8);
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put_1p8:
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regulator_put(hsusb_1p8);
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disable_3p3:
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regulator_disable(hsusb_3p3);
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put_3p3:
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regulator_put(hsusb_3p3);
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return rc;
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}
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static int msm_hsusb_ldo_set_mode(int on)
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{
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int ret = 0;
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if (!hsusb_1p8 || IS_ERR(hsusb_1p8)) {
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pr_err("%s: HSUSB_1p8 is not initialized\n", __func__);
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return -ENODEV;
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}
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if (!hsusb_3p3 || IS_ERR(hsusb_3p3)) {
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pr_err("%s: HSUSB_3p3 is not initialized\n", __func__);
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return -ENODEV;
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}
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if (on) {
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ret = regulator_set_optimum_mode(hsusb_1p8,
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USB_PHY_1P8_HPM_LOAD);
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if (ret < 0) {
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pr_err("%s: Unable to set HPM of the regulator "
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"HSUSB_1p8\n", __func__);
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return ret;
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}
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ret = regulator_set_optimum_mode(hsusb_3p3,
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USB_PHY_3P3_HPM_LOAD);
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if (ret < 0) {
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pr_err("%s: Unable to set HPM of the regulator "
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"HSUSB_3p3\n", __func__);
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regulator_set_optimum_mode(hsusb_1p8,
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USB_PHY_1P8_LPM_LOAD);
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return ret;
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}
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} else {
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ret = regulator_set_optimum_mode(hsusb_1p8,
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USB_PHY_1P8_LPM_LOAD);
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if (ret < 0)
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pr_err("%s: Unable to set LPM of the regulator "
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"HSUSB_1p8\n", __func__);
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ret = regulator_set_optimum_mode(hsusb_3p3,
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USB_PHY_3P3_LPM_LOAD);
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if (ret < 0)
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pr_err("%s: Unable to set LPM of the regulator "
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"HSUSB_3p3\n", __func__);
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}
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pr_debug("reg (%s)\n", on ? "HPM" : "LPM");
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return ret < 0 ? ret : 0;
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}
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static int ulpi_read(struct otg_transceiver *otg, u32 reg)
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{
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struct msm_otg *motg = container_of(otg, struct msm_otg, otg);
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@ -1297,6 +1463,24 @@ static int __init msm_otg_probe(struct platform_device *pdev)
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clk_enable(motg->clk);
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clk_enable(motg->pclk);
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ret = msm_hsusb_init_vddcx(motg, 1);
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if (ret) {
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dev_err(&pdev->dev, "hsusb vddcx configuration failed\n");
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goto free_regs;
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}
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ret = msm_hsusb_ldo_init(motg, 1);
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if (ret) {
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dev_err(&pdev->dev, "hsusb vreg configuration failed\n");
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goto vddcx_exit;
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}
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ret = msm_hsusb_ldo_set_mode(1);
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if (ret) {
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dev_err(&pdev->dev, "hsusb vreg enable failed\n");
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goto ldo_exit;
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}
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if (motg->core_clk)
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clk_enable(motg->core_clk);
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@ -1345,6 +1529,10 @@ free_irq:
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disable_clks:
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clk_disable(motg->pclk);
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clk_disable(motg->clk);
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ldo_exit:
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msm_hsusb_ldo_init(motg, 0);
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vddcx_exit:
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msm_hsusb_init_vddcx(motg, 0);
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free_regs:
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iounmap(motg->regs);
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put_core_clk:
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@ -1410,6 +1598,7 @@ static int __devexit msm_otg_remove(struct platform_device *pdev)
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clk_disable(motg->pclk_src);
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clk_put(motg->pclk_src);
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}
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msm_hsusb_ldo_init(motg, 0);
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iounmap(motg->regs);
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pm_runtime_set_suspended(&pdev->dev);
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