[PATCH v6 15/19] usb: phy: msm: Fix PTS definitions for MSM USB controller

[Ivan T. Ivanov]

From: Tim Bird <tbird20d@xxxxxxxxx>

Fix the value used for Parallel Transceiver Select (PTS) for the MSM USB
controller.  This is a standard chipidea PORTSC definition, where
a PHY_TYPE of 10b (<<30) is ULPI and 11b (<<30) is SERIAL.
Fix the definitions and use them correctly in the driver code.

Signed-off-by: Tim Bird <tim.bird@xxxxxxxxxxxxxx>
---
 drivers/usb/phy/phy-msm-usb.c    | 8 +++++---
 include/linux/usb/msm_hsusb_hw.h | 5 +++--
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index dababf9..e83d13a 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -287,8 +287,9 @@ static int msm_link_reset(struct msm_otg *motg)
 	if (motg->phy_number)
 		writel(readl(USB_PHY_CTRL2) | BIT(16), USB_PHY_CTRL2);

+	/* put transciever 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);

 	return 0;
 }
@@ -308,8 +309,9 @@ static int msm_otg_reset(struct usb_phy *phy)
 	if (cnt >= LINK_RESET_TIMEOUT_USEC)
 		return -ETIMEDOUT;

-	/* select ULPI phy */
-	writel(0x80000000, USB_PORTSC);
+	/* 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);

diff --git a/include/linux/usb/msm_hsusb_hw.h b/include/linux/usb/msm_hsusb_hw.h
index 575c743..98d3dd8 100644
--- a/include/linux/usb/msm_hsusb_hw.h
+++ b/include/linux/usb/msm_hsusb_hw.h
@@ -31,8 +31,9 @@
 #define USB_USBINTR          (MSM_USB_BASE + 0x0148)

 #define PORTSC_PHCD            (1 << 23) /* phy suspend mode */
-#define PORTSC_PTS_MASK         (3 << 30)
-#define PORTSC_PTS_ULPI         (3 << 30)
+#define PORTSC_PTS_MASK        (3 << 30)
+#define PORTSC_PTS_ULPI        (2 << 30)
+#define PORTSC_PTS_SERIAL      (3 << 30)

 #define USB_ULPI_VIEWPORT    (MSM_USB_BASE + 0x0170)
 #define ULPI_RUN              (1 << 30)
--
1.8.3.2

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