summaryrefslogtreecommitdiff
path: root/drivers/usb/phy/phy-msm-usb.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/usb/phy/phy-msm-usb.c')
-rw-r--r--drivers/usb/phy/phy-msm-usb.c702
1 files changed, 398 insertions, 304 deletions
diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index 5b37b81f2ef6..ced34f39bdd4 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -30,9 +30,13 @@
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/reset.h>
#include <linux/usb.h>
#include <linux/usb/otg.h>
+#include <linux/usb/of.h>
#include <linux/usb/ulpi.h>
#include <linux/usb/gadget.h>
#include <linux/usb/hcd.h>
@@ -44,6 +48,7 @@
#define DRIVER_NAME "msm_otg"
#define ULPI_IO_TIMEOUT_USEC (10 * 1000)
+#define LINK_RESET_TIMEOUT_USEC (250 * 1000)
#define USB_PHY_3P3_VOL_MIN 3050000 /* uV */
#define USB_PHY_3P3_VOL_MAX 3300000 /* uV */
@@ -57,48 +62,38 @@
#define USB_PHY_VDD_DIG_VOL_MIN 1000000 /* uV */
#define USB_PHY_VDD_DIG_VOL_MAX 1320000 /* uV */
+#define USB_PHY_SUSP_DIG_VOL 500000 /* uV */
-static struct regulator *hsusb_3p3;
-static struct regulator *hsusb_1p8;
-static struct regulator *hsusb_vddcx;
+enum vdd_levels {
+ VDD_LEVEL_NONE = 0,
+ VDD_LEVEL_MIN,
+ VDD_LEVEL_MAX,
+};
static int msm_hsusb_init_vddcx(struct msm_otg *motg, int init)
{
int ret = 0;
if (init) {
- hsusb_vddcx = regulator_get(motg->phy.dev, "HSUSB_VDDCX");
- if (IS_ERR(hsusb_vddcx)) {
- dev_err(motg->phy.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);
+ ret = regulator_set_voltage(motg->vddcx,
+ motg->vdd_levels[VDD_LEVEL_MIN],
+ motg->vdd_levels[VDD_LEVEL_MAX]);
if (ret) {
- dev_err(motg->phy.dev, "unable to set the voltage "
- "for hsusb vddcx\n");
- regulator_put(hsusb_vddcx);
+ dev_err(motg->phy.dev, "Cannot set vddcx voltage\n");
return ret;
}
- ret = regulator_enable(hsusb_vddcx);
- if (ret) {
+ ret = regulator_enable(motg->vddcx);
+ if (ret)
dev_err(motg->phy.dev, "unable to enable hsusb vddcx\n");
- regulator_put(hsusb_vddcx);
- }
} else {
- ret = regulator_set_voltage(hsusb_vddcx, 0,
- USB_PHY_VDD_DIG_VOL_MAX);
+ ret = regulator_set_voltage(motg->vddcx, 0,
+ motg->vdd_levels[VDD_LEVEL_MAX]);
if (ret)
- dev_err(motg->phy.dev, "unable to set the voltage "
- "for hsusb vddcx\n");
- ret = regulator_disable(hsusb_vddcx);
+ dev_err(motg->phy.dev, "Cannot set vddcx voltage\n");
+ ret = regulator_disable(motg->vddcx);
if (ret)
dev_err(motg->phy.dev, "unable to disable hsusb vddcx\n");
-
- regulator_put(hsusb_vddcx);
}
return ret;
@@ -109,98 +104,67 @@ static int msm_hsusb_ldo_init(struct msm_otg *motg, int init)
int rc = 0;
if (init) {
- hsusb_3p3 = regulator_get(motg->phy.dev, "HSUSB_3p3");
- if (IS_ERR(hsusb_3p3)) {
- dev_err(motg->phy.dev, "unable to get hsusb 3p3\n");
- return PTR_ERR(hsusb_3p3);
- }
-
- rc = regulator_set_voltage(hsusb_3p3, USB_PHY_3P3_VOL_MIN,
+ rc = regulator_set_voltage(motg->v3p3, USB_PHY_3P3_VOL_MIN,
USB_PHY_3P3_VOL_MAX);
if (rc) {
- dev_err(motg->phy.dev, "unable to set voltage level "
- "for hsusb 3p3\n");
- goto put_3p3;
+ dev_err(motg->phy.dev, "Cannot set v3p3 voltage\n");
+ goto exit;
}
- rc = regulator_enable(hsusb_3p3);
+ rc = regulator_enable(motg->v3p3);
if (rc) {
dev_err(motg->phy.dev, "unable to enable the hsusb 3p3\n");
- goto put_3p3;
+ goto exit;
}
- hsusb_1p8 = regulator_get(motg->phy.dev, "HSUSB_1p8");
- if (IS_ERR(hsusb_1p8)) {
- dev_err(motg->phy.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,
+ rc = regulator_set_voltage(motg->v1p8, USB_PHY_1P8_VOL_MIN,
USB_PHY_1P8_VOL_MAX);
if (rc) {
- dev_err(motg->phy.dev, "unable to set voltage level "
- "for hsusb 1p8\n");
- goto put_1p8;
+ dev_err(motg->phy.dev, "Cannot set v1p8 voltage\n");
+ goto disable_3p3;
}
- rc = regulator_enable(hsusb_1p8);
+ rc = regulator_enable(motg->v1p8);
if (rc) {
dev_err(motg->phy.dev, "unable to enable the hsusb 1p8\n");
- goto put_1p8;
+ goto disable_3p3;
}
return 0;
}
- regulator_disable(hsusb_1p8);
-put_1p8:
- regulator_put(hsusb_1p8);
+ regulator_disable(motg->v1p8);
disable_3p3:
- regulator_disable(hsusb_3p3);
-put_3p3:
- regulator_put(hsusb_3p3);
+ regulator_disable(motg->v3p3);
+exit:
return rc;
}
-static int msm_hsusb_ldo_set_mode(int on)
+static int msm_hsusb_ldo_set_mode(struct msm_otg *motg, 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,
+ ret = regulator_set_optimum_mode(motg->v1p8,
USB_PHY_1P8_HPM_LOAD);
if (ret < 0) {
- pr_err("%s: Unable to set HPM of the regulator "
- "HSUSB_1p8\n", __func__);
+ pr_err("Could not set HPM for v1p8\n");
return ret;
}
- ret = regulator_set_optimum_mode(hsusb_3p3,
+ ret = regulator_set_optimum_mode(motg->v3p3,
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,
+ pr_err("Could not set HPM for v3p3\n");
+ regulator_set_optimum_mode(motg->v1p8,
USB_PHY_1P8_LPM_LOAD);
return ret;
}
} else {
- ret = regulator_set_optimum_mode(hsusb_1p8,
+ ret = regulator_set_optimum_mode(motg->v1p8,
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,
+ pr_err("Could not set LPM for v1p8\n");
+ ret = regulator_set_optimum_mode(motg->v3p3,
USB_PHY_3P3_LPM_LOAD);
if (ret < 0)
- pr_err("%s: Unable to set LPM of the regulator "
- "HSUSB_3p3\n", __func__);
+ pr_err("Could not set LPM for v3p3\n");
}
pr_debug("reg (%s)\n", on ? "HPM" : "LPM");
@@ -265,27 +229,47 @@ static struct usb_phy_io_ops msm_otg_io_ops = {
static void ulpi_init(struct msm_otg *motg)
{
struct msm_otg_platform_data *pdata = motg->pdata;
- int *seq = pdata->phy_init_seq;
+ int *seq = pdata->phy_init_seq, idx;
+ u32 addr = ULPI_EXT_VENDOR_SPECIFIC;
- if (!seq)
- return;
+ for (idx = 0; idx < pdata->phy_init_sz; idx++) {
+ if (seq[idx] == -1)
+ continue;
- while (seq[0] >= 0) {
dev_vdbg(motg->phy.dev, "ulpi: write 0x%02x to 0x%02x\n",
- seq[0], seq[1]);
- ulpi_write(&motg->phy, seq[0], seq[1]);
- seq += 2;
+ seq[idx], addr + idx);
+ ulpi_write(&motg->phy, seq[idx], addr + idx);
}
}
+static int msm_phy_notify_disconnect(struct usb_phy *phy,
+ enum usb_device_speed speed)
+{
+ int val;
+
+ /*
+ * Put the transceiver in non-driving mode. Otherwise host
+ * may not detect soft-disconnection.
+ */
+ val = ulpi_read(phy, ULPI_FUNC_CTRL);
+ val &= ~ULPI_FUNC_CTRL_OPMODE_MASK;
+ val |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING;
+ ulpi_write(phy, val, ULPI_FUNC_CTRL);
+
+ return 0;
+}
+
static int msm_otg_link_clk_reset(struct msm_otg *motg, bool assert)
{
- int ret = 0;
+ int ret;
- if (!motg->pdata->link_clk_reset)
- return ret;
+ if (motg->pdata->link_clk_reset)
+ ret = motg->pdata->link_clk_reset(motg->clk, assert);
+ else if (assert)
+ ret = reset_control_assert(motg->link_rst);
+ else
+ ret = reset_control_deassert(motg->link_rst);
- ret = motg->pdata->link_clk_reset(motg->clk, assert);
if (ret)
dev_err(motg->phy.dev, "usb link clk reset %s failed\n",
assert ? "assert" : "deassert");
@@ -295,111 +279,150 @@ static int msm_otg_link_clk_reset(struct msm_otg *motg, bool assert)
static int msm_otg_phy_clk_reset(struct msm_otg *motg)
{
- int ret = 0;
+ int ret;
- if (!motg->pdata->phy_clk_reset)
- return ret;
+ if (motg->pdata->phy_clk_reset)
+ ret = motg->pdata->phy_clk_reset(motg->phy_reset_clk);
+ else
+ ret = reset_control_reset(motg->phy_rst);
- ret = motg->pdata->phy_clk_reset(motg->phy_reset_clk);
if (ret)
dev_err(motg->phy.dev, "usb phy clk reset failed\n");
return ret;
}
-static int msm_otg_phy_reset(struct msm_otg *motg)
+static int msm_link_reset(struct msm_otg *motg)
{
u32 val;
int ret;
- int retries;
ret = msm_otg_link_clk_reset(motg, 1);
if (ret)
return ret;
- ret = msm_otg_phy_clk_reset(motg);
- if (ret)
- return ret;
+
+ /* wait for 1ms delay as suggested in HPG. */
+ usleep_range(1000, 1200);
+
ret = msm_otg_link_clk_reset(motg, 0);
if (ret)
return ret;
+ if (motg->phy_number)
+ writel(readl(USB_PHY_CTRL2) | BIT(16), USB_PHY_CTRL2);
+
+ /* put transceiver in serial mode as part of reset */
val = readl(USB_PORTSC) & ~PORTSC_PTS_MASK;
- writel(val | PORTSC_PTS_ULPI, USB_PORTSC);
+ writel(val | PORTSC_PTS_SERIAL, USB_PORTSC);
- for (retries = 3; retries > 0; retries--) {
- ret = ulpi_write(&motg->phy, ULPI_FUNC_CTRL_SUSPENDM,
- ULPI_CLR(ULPI_FUNC_CTRL));
- if (!ret)
- break;
- ret = msm_otg_phy_clk_reset(motg);
- if (ret)
- return ret;
- }
- if (!retries)
- return -ETIMEDOUT;
+ return 0;
+}
- /* This reset calibrates the phy, if the above write succeeded */
- ret = msm_otg_phy_clk_reset(motg);
- if (ret)
- return ret;
+static int msm_otg_reset(struct usb_phy *phy)
+{
+ struct msm_otg *motg = container_of(phy, struct msm_otg, phy);
+ int cnt = 0;
- for (retries = 3; retries > 0; retries--) {
- ret = ulpi_read(&motg->phy, ULPI_DEBUG);
- if (ret != -ETIMEDOUT)
+ writel(USBCMD_RESET, USB_USBCMD);
+ while (cnt < LINK_RESET_TIMEOUT_USEC) {
+ if (!(readl(USB_USBCMD) & USBCMD_RESET))
break;
- ret = msm_otg_phy_clk_reset(motg);
- if (ret)
- return ret;
+ udelay(1);
+ cnt++;
}
- if (!retries)
+ if (cnt >= LINK_RESET_TIMEOUT_USEC)
return -ETIMEDOUT;
- dev_info(motg->phy.dev, "phy_reset: success\n");
+ /* select ULPI phy and clear other status/control bits in PORTSC */
+ writel(PORTSC_PTS_ULPI, USB_PORTSC);
+
+ writel(0x0, USB_AHBBURST);
+ writel(0x08, USB_AHBMODE);
+
+ if (motg->phy_number)
+ writel(readl(USB_PHY_CTRL2) | BIT(16), USB_PHY_CTRL2);
return 0;
}
-#define LINK_RESET_TIMEOUT_USEC (250 * 1000)
-static int msm_otg_reset(struct usb_phy *phy)
+static void msm_phy_reset(struct msm_otg *motg)
+{
+ void __iomem *addr;
+
+ if (motg->pdata->phy_type != SNPS_28NM_INTEGRATED_PHY) {
+ msm_otg_phy_clk_reset(motg);
+ return;
+ }
+
+ addr = USB_PHY_CTRL;
+ if (motg->phy_number)
+ addr = USB_PHY_CTRL2;
+
+ /* Assert USB PHY_POR */
+ writel(readl(addr) | PHY_POR_ASSERT, addr);
+
+ /*
+ * wait for minimum 10 microseconds as suggested in HPG.
+ * Use a slightly larger value since the exact value didn't
+ * work 100% of the time.
+ */
+ udelay(12);
+
+ /* Deassert USB PHY_POR */
+ writel(readl(addr) & ~PHY_POR_ASSERT, addr);
+}
+
+static int msm_usb_reset(struct usb_phy *phy)
{
struct msm_otg *motg = container_of(phy, struct msm_otg, phy);
- struct msm_otg_platform_data *pdata = motg->pdata;
- int cnt = 0;
int ret;
- u32 val = 0;
- u32 ulpi_val = 0;
- ret = msm_otg_phy_reset(motg);
+ if (!IS_ERR(motg->core_clk))
+ clk_prepare_enable(motg->core_clk);
+
+ ret = msm_link_reset(motg);
if (ret) {
dev_err(phy->dev, "phy_reset failed\n");
return ret;
}
- ulpi_init(motg);
-
- writel(USBCMD_RESET, USB_USBCMD);
- while (cnt < LINK_RESET_TIMEOUT_USEC) {
- if (!(readl(USB_USBCMD) & USBCMD_RESET))
- break;
- udelay(1);
- cnt++;
+ ret = msm_otg_reset(&motg->phy);
+ if (ret) {
+ dev_err(phy->dev, "link reset failed\n");
+ return ret;
}
- if (cnt >= LINK_RESET_TIMEOUT_USEC)
- return -ETIMEDOUT;
-
- /* select ULPI phy */
- writel(0x80000000, USB_PORTSC);
msleep(100);
- writel(0x0, USB_AHBBURST);
- writel(0x00, USB_AHBMODE);
+ /* Reset USB PHY after performing USB Link RESET */
+ msm_phy_reset(motg);
+
+ if (!IS_ERR(motg->core_clk))
+ clk_disable_unprepare(motg->core_clk);
+
+ return 0;
+}
+
+static int msm_phy_init(struct usb_phy *phy)
+{
+ struct msm_otg *motg = container_of(phy, struct msm_otg, phy);
+ struct msm_otg_platform_data *pdata = motg->pdata;
+ u32 val, ulpi_val = 0;
+
+ /* Program USB PHY Override registers. */
+ ulpi_init(motg);
+
+ /*
+ * It is recommended in HPG to reset USB PHY after programming
+ * USB PHY Override registers.
+ */
+ msm_phy_reset(motg);
if (pdata->otg_control == OTG_PHY_CONTROL) {
val = readl(USB_OTGSC);
- if (pdata->mode == USB_OTG) {
+ if (pdata->mode == USB_DR_MODE_OTG) {
ulpi_val = ULPI_INT_IDGRD | ULPI_INT_SESS_VALID;
val |= OTGSC_IDIE | OTGSC_BSVIE;
- } else if (pdata->mode == USB_PERIPHERAL) {
+ } else if (pdata->mode == USB_DR_MODE_PERIPHERAL) {
ulpi_val = ULPI_INT_SESS_VALID;
val |= OTGSC_BSVIE;
}
@@ -408,6 +431,9 @@ static int msm_otg_reset(struct usb_phy *phy)
ulpi_write(phy, ulpi_val, ULPI_USB_INT_EN_FALL);
}
+ if (motg->phy_number)
+ writel(readl(USB_PHY_CTRL2) | BIT(16), USB_PHY_CTRL2);
+
return 0;
}
@@ -416,22 +442,20 @@ static int msm_otg_reset(struct usb_phy *phy)
#ifdef CONFIG_PM
-#define USB_PHY_SUSP_DIG_VOL 500000
-static int msm_hsusb_config_vddcx(int high)
+static int msm_hsusb_config_vddcx(struct msm_otg *motg, int high)
{
- int max_vol = USB_PHY_VDD_DIG_VOL_MAX;
+ int max_vol = motg->vdd_levels[VDD_LEVEL_MAX];
int min_vol;
int ret;
if (high)
- min_vol = USB_PHY_VDD_DIG_VOL_MIN;
+ min_vol = motg->vdd_levels[VDD_LEVEL_MIN];
else
- min_vol = USB_PHY_SUSP_DIG_VOL;
+ min_vol = motg->vdd_levels[VDD_LEVEL_NONE];
- ret = regulator_set_voltage(hsusb_vddcx, min_vol, max_vol);
+ ret = regulator_set_voltage(motg->vddcx, min_vol, max_vol);
if (ret) {
- pr_err("%s: unable to set the voltage for regulator "
- "HSUSB_VDDCX\n", __func__);
+ pr_err("Cannot set vddcx voltage\n");
return ret;
}
@@ -445,6 +469,7 @@ static int msm_otg_suspend(struct msm_otg *motg)
struct usb_phy *phy = &motg->phy;
struct usb_bus *bus = phy->otg->host;
struct msm_otg_platform_data *pdata = motg->pdata;
+ void __iomem *addr;
int cnt = 0;
if (atomic_read(&motg->in_lpm))
@@ -504,22 +529,23 @@ static int msm_otg_suspend(struct msm_otg *motg)
*/
writel(readl(USB_USBCMD) | ASYNC_INTR_CTRL | ULPI_STP_CTRL, USB_USBCMD);
+ addr = USB_PHY_CTRL;
+ if (motg->phy_number)
+ addr = USB_PHY_CTRL2;
+
if (motg->pdata->phy_type == SNPS_28NM_INTEGRATED_PHY &&
motg->pdata->otg_control == OTG_PMIC_CONTROL)
- writel(readl(USB_PHY_CTRL) | PHY_RETEN, USB_PHY_CTRL);
+ writel(readl(addr) | PHY_RETEN, addr);
clk_disable_unprepare(motg->pclk);
clk_disable_unprepare(motg->clk);
- if (motg->core_clk)
+ if (!IS_ERR(motg->core_clk))
clk_disable_unprepare(motg->core_clk);
- if (!IS_ERR(motg->pclk_src))
- clk_disable_unprepare(motg->pclk_src);
-
if (motg->pdata->phy_type == SNPS_28NM_INTEGRATED_PHY &&
motg->pdata->otg_control == OTG_PMIC_CONTROL) {
- msm_hsusb_ldo_set_mode(0);
- msm_hsusb_config_vddcx(0);
+ msm_hsusb_ldo_set_mode(motg, 0);
+ msm_hsusb_config_vddcx(motg, 0);
}
if (device_may_wakeup(phy->dev))
@@ -539,25 +565,28 @@ static int msm_otg_resume(struct msm_otg *motg)
{
struct usb_phy *phy = &motg->phy;
struct usb_bus *bus = phy->otg->host;
+ void __iomem *addr;
int cnt = 0;
unsigned temp;
if (!atomic_read(&motg->in_lpm))
return 0;
- if (!IS_ERR(motg->pclk_src))
- clk_prepare_enable(motg->pclk_src);
-
clk_prepare_enable(motg->pclk);
clk_prepare_enable(motg->clk);
- if (motg->core_clk)
+ if (!IS_ERR(motg->core_clk))
clk_prepare_enable(motg->core_clk);
if (motg->pdata->phy_type == SNPS_28NM_INTEGRATED_PHY &&
motg->pdata->otg_control == OTG_PMIC_CONTROL) {
- msm_hsusb_ldo_set_mode(1);
- msm_hsusb_config_vddcx(1);
- writel(readl(USB_PHY_CTRL) & ~PHY_RETEN, USB_PHY_CTRL);
+
+ addr = USB_PHY_CTRL;
+ if (motg->phy_number)
+ addr = USB_PHY_CTRL2;
+
+ msm_hsusb_ldo_set_mode(motg, 1);
+ msm_hsusb_config_vddcx(motg, 1);
+ writel(readl(addr) & ~PHY_RETEN, addr);
}
temp = readl(USB_USBCMD);
@@ -586,8 +615,7 @@ static int msm_otg_resume(struct msm_otg *motg)
* PHY. USB state can not be restored. Re-insertion
* of USB cable is the only way to get USB working.
*/
- dev_err(phy->dev, "Unable to resume USB."
- "Re-plugin the cable\n");
+ dev_err(phy->dev, "Unable to resume USB. Re-plugin the cable\n");
msm_otg_reset(phy);
}
@@ -687,7 +715,7 @@ static int msm_otg_set_host(struct usb_otg *otg, struct usb_bus *host)
* Fail host registration if this board can support
* only peripheral configuration.
*/
- if (motg->pdata->mode == USB_PERIPHERAL) {
+ if (motg->pdata->mode == USB_DR_MODE_PERIPHERAL) {
dev_info(otg->phy->dev, "Host mode is not supported\n");
return -ENODEV;
}
@@ -716,7 +744,7 @@ static int msm_otg_set_host(struct usb_otg *otg, struct usb_bus *host)
* Kick the state machine work, if peripheral is not supported
* or peripheral is already registered with us.
*/
- if (motg->pdata->mode == USB_HOST || otg->gadget) {
+ if (motg->pdata->mode == USB_DR_MODE_HOST || otg->gadget) {
pm_runtime_get_sync(otg->phy->dev);
schedule_work(&motg->sm_work);
}
@@ -760,7 +788,7 @@ static int msm_otg_set_peripheral(struct usb_otg *otg,
* Fail peripheral registration if this board can support
* only host configuration.
*/
- if (motg->pdata->mode == USB_HOST) {
+ if (motg->pdata->mode == USB_DR_MODE_HOST) {
dev_info(otg->phy->dev, "Peripheral mode is not supported\n");
return -ENODEV;
}
@@ -785,7 +813,7 @@ static int msm_otg_set_peripheral(struct usb_otg *otg,
* Kick the state machine work, if host is not supported
* or host is already registered with us.
*/
- if (motg->pdata->mode == USB_PERIPHERAL || otg->host) {
+ if (motg->pdata->mode == USB_DR_MODE_PERIPHERAL || otg->host) {
pm_runtime_get_sync(otg->phy->dev);
schedule_work(&motg->sm_work);
}
@@ -1106,7 +1134,7 @@ static void msm_otg_init_sm(struct msm_otg *motg)
u32 otgsc = readl(USB_OTGSC);
switch (pdata->mode) {
- case USB_OTG:
+ case USB_DR_MODE_OTG:
if (pdata->otg_control == OTG_PHY_CONTROL) {
if (otgsc & OTGSC_ID)
set_bit(ID, &motg->inputs);
@@ -1118,21 +1146,14 @@ static void msm_otg_init_sm(struct msm_otg *motg)
else
clear_bit(B_SESS_VLD, &motg->inputs);
} else if (pdata->otg_control == OTG_USER_CONTROL) {
- if (pdata->default_mode == USB_HOST) {
- clear_bit(ID, &motg->inputs);
- } else if (pdata->default_mode == USB_PERIPHERAL) {
- set_bit(ID, &motg->inputs);
- set_bit(B_SESS_VLD, &motg->inputs);
- } else {
set_bit(ID, &motg->inputs);
clear_bit(B_SESS_VLD, &motg->inputs);
- }
}
break;
- case USB_HOST:
+ case USB_DR_MODE_HOST:
clear_bit(ID, &motg->inputs);
break;
- case USB_PERIPHERAL:
+ case USB_DR_MODE_PERIPHERAL:
set_bit(ID, &motg->inputs);
if (otgsc & OTGSC_BSV)
set_bit(B_SESS_VLD, &motg->inputs);
@@ -1282,13 +1303,13 @@ static int msm_otg_mode_show(struct seq_file *s, void *unused)
switch (otg->phy->state) {
case OTG_STATE_A_HOST:
- seq_printf(s, "host\n");
+ seq_puts(s, "host\n");
break;
case OTG_STATE_B_PERIPHERAL:
- seq_printf(s, "peripheral\n");
+ seq_puts(s, "peripheral\n");
break;
default:
- seq_printf(s, "none\n");
+ seq_puts(s, "none\n");
break;
}
@@ -1308,7 +1329,7 @@ static ssize_t msm_otg_mode_write(struct file *file, const char __user *ubuf,
char buf[16];
struct usb_otg *otg = motg->phy.otg;
int status = count;
- enum usb_mode_type req_mode;
+ enum usb_dr_mode req_mode;
memset(buf, 0x00, sizeof(buf));
@@ -1318,18 +1339,18 @@ static ssize_t msm_otg_mode_write(struct file *file, const char __user *ubuf,
}
if (!strncmp(buf, "host", 4)) {
- req_mode = USB_HOST;
+ req_mode = USB_DR_MODE_HOST;
} else if (!strncmp(buf, "peripheral", 10)) {
- req_mode = USB_PERIPHERAL;
+ req_mode = USB_DR_MODE_PERIPHERAL;
} else if (!strncmp(buf, "none", 4)) {
- req_mode = USB_NONE;
+ req_mode = USB_DR_MODE_UNKNOWN;
} else {
status = -EINVAL;
goto out;
}
switch (req_mode) {
- case USB_NONE:
+ case USB_DR_MODE_UNKNOWN:
switch (otg->phy->state) {
case OTG_STATE_A_HOST:
case OTG_STATE_B_PERIPHERAL:
@@ -1340,7 +1361,7 @@ static ssize_t msm_otg_mode_write(struct file *file, const char __user *ubuf,
goto out;
}
break;
- case USB_PERIPHERAL:
+ case USB_DR_MODE_PERIPHERAL:
switch (otg->phy->state) {
case OTG_STATE_B_IDLE:
case OTG_STATE_A_HOST:
@@ -1351,7 +1372,7 @@ static ssize_t msm_otg_mode_write(struct file *file, const char __user *ubuf,
goto out;
}
break;
- case USB_HOST:
+ case USB_DR_MODE_HOST:
switch (otg->phy->state) {
case OTG_STATE_B_IDLE:
case OTG_STATE_B_PERIPHERAL:
@@ -1406,74 +1427,154 @@ static void msm_otg_debugfs_cleanup(void)
debugfs_remove(msm_otg_dbg_root);
}
-static int __init msm_otg_probe(struct platform_device *pdev)
+static struct of_device_id msm_otg_dt_match[] = {
+ {
+ .compatible = "qcom,usb-otg-ci",
+ .data = (void *) CI_45NM_INTEGRATED_PHY
+ },
+ {
+ .compatible = "qcom,usb-otg-snps",
+ .data = (void *) SNPS_28NM_INTEGRATED_PHY
+ },
+ { }
+};
+MODULE_DEVICE_TABLE(of, msm_otg_dt_match);
+
+static int msm_otg_read_dt(struct platform_device *pdev, struct msm_otg *motg)
+{
+ struct msm_otg_platform_data *pdata;
+ const struct of_device_id *id;
+ struct device_node *node = pdev->dev.of_node;
+ struct property *prop;
+ int len, ret, words;
+ u32 val, tmp[3];
+
+ pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+
+ motg->pdata = pdata;
+
+ id = of_match_device(msm_otg_dt_match, &pdev->dev);
+ pdata->phy_type = (enum msm_usb_phy_type) id->data;
+
+ motg->link_rst = devm_reset_control_get(&pdev->dev, "link");
+ if (IS_ERR(motg->link_rst))
+ return PTR_ERR(motg->link_rst);
+
+ motg->phy_rst = devm_reset_control_get(&pdev->dev, "phy");
+ if (IS_ERR(motg->phy_rst))
+ return PTR_ERR(motg->phy_rst);
+
+ pdata->mode = of_usb_get_dr_mode(node);
+ if (pdata->mode == USB_DR_MODE_UNKNOWN)
+ pdata->mode = USB_DR_MODE_OTG;
+
+ pdata->otg_control = OTG_PHY_CONTROL;
+ if (!of_property_read_u32(node, "qcom,otg-control", &val))
+ if (val == OTG_PMIC_CONTROL)
+ pdata->otg_control = val;
+
+ if (!of_property_read_u32(node, "qcom,phy-num", &val) && val < 2)
+ motg->phy_number = val;
+
+ motg->vdd_levels[VDD_LEVEL_NONE] = USB_PHY_SUSP_DIG_VOL;
+ motg->vdd_levels[VDD_LEVEL_MIN] = USB_PHY_VDD_DIG_VOL_MIN;
+ motg->vdd_levels[VDD_LEVEL_MAX] = USB_PHY_VDD_DIG_VOL_MAX;
+
+ if (of_get_property(node, "qcom,vdd-levels", &len) &&
+ len == sizeof(tmp)) {
+ of_property_read_u32_array(node, "qcom,vdd-levels",
+ tmp, len / sizeof(*tmp));
+ motg->vdd_levels[VDD_LEVEL_NONE] = tmp[VDD_LEVEL_NONE];
+ motg->vdd_levels[VDD_LEVEL_MIN] = tmp[VDD_LEVEL_MIN];
+ motg->vdd_levels[VDD_LEVEL_MAX] = tmp[VDD_LEVEL_MAX];
+ }
+
+ prop = of_find_property(node, "qcom,phy-init-sequence", &len);
+ if (!prop || !len)
+ return 0;
+
+ words = len / sizeof(u32);
+
+ if (words >= ULPI_EXT_VENDOR_SPECIFIC) {
+ dev_warn(&pdev->dev, "Too big PHY init sequence %d\n", words);
+ return 0;
+ }
+
+ pdata->phy_init_seq = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
+ if (!pdata->phy_init_seq) {
+ dev_warn(&pdev->dev, "No space for PHY init sequence\n");
+ return 0;
+ }
+
+ ret = of_property_read_u32_array(node, "qcom,phy-init-sequence",
+ pdata->phy_init_seq, words);
+ if (!ret)
+ pdata->phy_init_sz = words;
+
+ return 0;
+}
+
+static int msm_otg_probe(struct platform_device *pdev)
{
+ struct regulator_bulk_data regs[3];
int ret = 0;
+ struct device_node *np = pdev->dev.of_node;
+ struct msm_otg_platform_data *pdata;
struct resource *res;
struct msm_otg *motg;
struct usb_phy *phy;
+ void __iomem *phy_select;
- dev_info(&pdev->dev, "msm_otg probe\n");
- if (!dev_get_platdata(&pdev->dev)) {
- dev_err(&pdev->dev, "No platform data given. Bailing out\n");
- return -ENODEV;
- }
-
- motg = kzalloc(sizeof(struct msm_otg), GFP_KERNEL);
+ motg = devm_kzalloc(&pdev->dev, sizeof(struct msm_otg), GFP_KERNEL);
if (!motg) {
dev_err(&pdev->dev, "unable to allocate msm_otg\n");
return -ENOMEM;
}
- motg->phy.otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL);
+ pdata = dev_get_platdata(&pdev->dev);
+ if (!pdata) {
+ if (!np)
+ return -ENXIO;
+ ret = msm_otg_read_dt(pdev, motg);
+ if (ret)
+ return ret;
+ }
+
+ motg->phy.otg = devm_kzalloc(&pdev->dev, sizeof(struct usb_otg),
+ GFP_KERNEL);
if (!motg->phy.otg) {
dev_err(&pdev->dev, "unable to allocate msm_otg\n");
- ret = -ENOMEM;
- goto free_motg;
+ return -ENOMEM;
}
- motg->pdata = dev_get_platdata(&pdev->dev);
phy = &motg->phy;
phy->dev = &pdev->dev;
- motg->phy_reset_clk = clk_get(&pdev->dev, "usb_phy_clk");
+ motg->phy_reset_clk = devm_clk_get(&pdev->dev,
+ np ? "phy" : "usb_phy_clk");
if (IS_ERR(motg->phy_reset_clk)) {
dev_err(&pdev->dev, "failed to get usb_phy_clk\n");
- ret = PTR_ERR(motg->phy_reset_clk);
- goto free_motg;
+ return PTR_ERR(motg->phy_reset_clk);
}
- motg->clk = clk_get(&pdev->dev, "usb_hs_clk");
+ motg->clk = devm_clk_get(&pdev->dev, np ? "core" : "usb_hs_clk");
if (IS_ERR(motg->clk)) {
dev_err(&pdev->dev, "failed to get usb_hs_clk\n");
- ret = PTR_ERR(motg->clk);
- goto put_phy_reset_clk;
+ return PTR_ERR(motg->clk);
}
- clk_set_rate(motg->clk, 60000000);
/*
* If USB Core is running its protocol engine based on CORE CLK,
* CORE CLK must be running at >55Mhz for correct HSUSB
* operation and USB core cannot tolerate frequency changes on
- * CORE CLK. For such USB cores, vote for maximum clk frequency
- * on pclk source
+ * CORE CLK.
*/
- if (motg->pdata->pclk_src_name) {
- motg->pclk_src = clk_get(&pdev->dev,
- motg->pdata->pclk_src_name);
- if (IS_ERR(motg->pclk_src))
- goto put_clk;
- clk_set_rate(motg->pclk_src, INT_MAX);
- clk_prepare_enable(motg->pclk_src);
- } else
- motg->pclk_src = ERR_PTR(-ENOENT);
-
-
- motg->pclk = clk_get(&pdev->dev, "usb_hs_pclk");
+ motg->pclk = devm_clk_get(&pdev->dev, np ? "iface" : "usb_hs_pclk");
if (IS_ERR(motg->pclk)) {
dev_err(&pdev->dev, "failed to get usb_hs_pclk\n");
- ret = PTR_ERR(motg->pclk);
- goto put_pclk_src;
+ return PTR_ERR(motg->pclk);
}
/*
@@ -1481,69 +1582,90 @@ static int __init msm_otg_probe(struct platform_device *pdev)
* clock is introduced to remove the dependency on AXI
* bus frequency.
*/
- motg->core_clk = clk_get(&pdev->dev, "usb_hs_core_clk");
- if (IS_ERR(motg->core_clk))
- motg->core_clk = NULL;
+ motg->core_clk = devm_clk_get(&pdev->dev,
+ np ? "alt_core" : "usb_hs_core_clk");
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(&pdev->dev, "failed to get platform resource mem\n");
- ret = -ENODEV;
- goto put_core_clk;
- }
+ if (!res)
+ return -EINVAL;
+ motg->regs = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+ if (!motg->regs)
+ return -ENOMEM;
- motg->regs = ioremap(res->start, resource_size(res));
- if (!motg->regs) {
- dev_err(&pdev->dev, "ioremap failed\n");
- ret = -ENOMEM;
- goto put_core_clk;
+ /*
+ * NOTE: The PHYs can be multiplexed between the chipidea controller
+ * and the dwc3 controller, using a single bit. It is important that
+ * the dwc3 driver does not set this bit in an incompatible way.
+ */
+ if (motg->phy_number) {
+ phy_select = devm_ioremap_nocache(&pdev->dev, USB2_PHY_SEL, 4);
+ if (IS_ERR(phy_select))
+ return PTR_ERR(phy_select);
+ /* Enable second PHY with the OTG port */
+ writel(0x1, phy_select);
}
+
dev_info(&pdev->dev, "OTG regs = %p\n", motg->regs);
motg->irq = platform_get_irq(pdev, 0);
- if (!motg->irq) {
+ if (motg->irq < 0) {
dev_err(&pdev->dev, "platform_get_irq failed\n");
- ret = -ENODEV;
- goto free_regs;
+ return motg->irq;
}
+ regs[0].supply = "vddcx";
+ regs[1].supply = "v3p3";
+ regs[2].supply = "v1p8";
+
+ ret = devm_regulator_bulk_get(motg->phy.dev, ARRAY_SIZE(regs), regs);
+ if (ret)
+ return ret;
+
+ motg->vddcx = regs[0].consumer;
+ motg->v3p3 = regs[1].consumer;
+ motg->v1p8 = regs[2].consumer;
+
+ clk_set_rate(motg->clk, 60000000);
+
clk_prepare_enable(motg->clk);
clk_prepare_enable(motg->pclk);
+ if (!IS_ERR(motg->core_clk))
+ clk_prepare_enable(motg->core_clk);
+
ret = msm_hsusb_init_vddcx(motg, 1);
if (ret) {
dev_err(&pdev->dev, "hsusb vddcx configuration failed\n");
- goto free_regs;
+ goto disable_clks;
}
ret = msm_hsusb_ldo_init(motg, 1);
if (ret) {
dev_err(&pdev->dev, "hsusb vreg configuration failed\n");
- goto vddcx_exit;
+ goto disable_vddcx;
}
- ret = msm_hsusb_ldo_set_mode(1);
+ ret = msm_hsusb_ldo_set_mode(motg, 1);
if (ret) {
dev_err(&pdev->dev, "hsusb vreg enable failed\n");
- goto ldo_exit;
+ goto disable_ldo;
}
- if (motg->core_clk)
- clk_prepare_enable(motg->core_clk);
-
writel(0, USB_USBINTR);
writel(0, USB_OTGSC);
INIT_WORK(&motg->sm_work, msm_otg_sm_work);
INIT_DELAYED_WORK(&motg->chg_work, msm_chg_detect_work);
- ret = request_irq(motg->irq, msm_otg_irq, IRQF_SHARED,
+ ret = devm_request_irq(&pdev->dev, motg->irq, msm_otg_irq, IRQF_SHARED,
"msm_otg", motg);
if (ret) {
dev_err(&pdev->dev, "request irq failed\n");
- goto disable_clks;
+ goto disable_ldo;
}
- phy->init = msm_otg_reset;
+ phy->init = msm_phy_init;
phy->set_power = msm_otg_set_power;
+ phy->notify_disconnect = msm_phy_notify_disconnect;
+ phy->type = USB_PHY_TYPE_USB2;
phy->io_ops = &msm_otg_io_ops;
@@ -1551,54 +1673,38 @@ static int __init msm_otg_probe(struct platform_device *pdev)
phy->otg->set_host = msm_otg_set_host;
phy->otg->set_peripheral = msm_otg_set_peripheral;
- ret = usb_add_phy(&motg->phy, USB_PHY_TYPE_USB2);
+ msm_usb_reset(phy);
+
+ ret = usb_add_phy_dev(&motg->phy);
if (ret) {
dev_err(&pdev->dev, "usb_add_phy failed\n");
- goto free_irq;
+ goto disable_ldo;
}
platform_set_drvdata(pdev, motg);
device_init_wakeup(&pdev->dev, 1);
- if (motg->pdata->mode == USB_OTG &&
- motg->pdata->otg_control == OTG_USER_CONTROL) {
+ if (motg->pdata->mode == USB_DR_MODE_OTG &&
+ motg->pdata->otg_control == OTG_USER_CONTROL) {
ret = msm_otg_debugfs_init(motg);
if (ret)
- dev_dbg(&pdev->dev, "mode debugfs file is"
- "not available\n");
+ dev_dbg(&pdev->dev, "Can not create mode change file\n");
}
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
return 0;
-free_irq:
- free_irq(motg->irq, motg);
+
+disable_ldo:
+ msm_hsusb_ldo_init(motg, 0);
+disable_vddcx:
+ msm_hsusb_init_vddcx(motg, 0);
disable_clks:
clk_disable_unprepare(motg->pclk);
clk_disable_unprepare(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:
- if (motg->core_clk)
- clk_put(motg->core_clk);
- clk_put(motg->pclk);
-put_pclk_src:
- if (!IS_ERR(motg->pclk_src)) {
- clk_disable_unprepare(motg->pclk_src);
- clk_put(motg->pclk_src);
- }
-put_clk:
- clk_put(motg->clk);
-put_phy_reset_clk:
- clk_put(motg->phy_reset_clk);
-free_motg:
- kfree(motg->phy.otg);
- kfree(motg);
+ if (!IS_ERR(motg->core_clk))
+ clk_disable_unprepare(motg->core_clk);
return ret;
}
@@ -1621,7 +1727,7 @@ static int msm_otg_remove(struct platform_device *pdev)
pm_runtime_disable(&pdev->dev);
usb_remove_phy(phy);
- free_irq(motg->irq, motg);
+ disable_irq(motg->irq);
/*
* Put PHY in low power mode.
@@ -1641,26 +1747,12 @@ static int msm_otg_remove(struct platform_device *pdev)
clk_disable_unprepare(motg->pclk);
clk_disable_unprepare(motg->clk);
- if (motg->core_clk)
+ if (!IS_ERR(motg->core_clk))
clk_disable_unprepare(motg->core_clk);
- if (!IS_ERR(motg->pclk_src)) {
- clk_disable_unprepare(motg->pclk_src);
- clk_put(motg->pclk_src);
- }
msm_hsusb_ldo_init(motg, 0);
- iounmap(motg->regs);
pm_runtime_set_suspended(&pdev->dev);
- clk_put(motg->phy_reset_clk);
- clk_put(motg->pclk);
- clk_put(motg->clk);
- if (motg->core_clk)
- clk_put(motg->core_clk);
-
- kfree(motg->phy.otg);
- kfree(motg);
-
return 0;
}
@@ -1740,15 +1832,17 @@ static const struct dev_pm_ops msm_otg_dev_pm_ops = {
};
static struct platform_driver msm_otg_driver = {
+ .probe = msm_otg_probe,
.remove = msm_otg_remove,
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
.pm = &msm_otg_dev_pm_ops,
+ .of_match_table = msm_otg_dt_match,
},
};
-module_platform_driver_probe(msm_otg_driver, msm_otg_probe);
+module_platform_driver(msm_otg_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("MSM USB transceiver driver");