linux-kernel - [PATCH 1/9] usb:fsl:otg: Add controller version based ULPI and UTMI phy

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Date:	Thu, 26 Mar 2015 20:47:36 +0530
From:	Ramneek Mehresh <ramneek.mehresh@...escale.com>
To:	<linux-kernel@...r.kernel.org>
CC:	<balbi@...com>, <stern@...land.harvard.edu>,
	<gregkh@...uxfoundation.org>,
	Ramneek Mehresh <ramneek.mehresh@...escale.com>,
	Shengzhou Liu <Shengzhou.Liu@...escale.com>
Subject: [PATCH 1/9] usb:fsl:otg: Add controller version based ULPI and UTMI phy

Add controller version based ULPI and UTMI phy initialization for
otg driver

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@...escale.com>
Signed-off-by: Ramneek Mehresh <ramneek.mehresh@...escale.com>
Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@...escale.com>
Tested-by: Fleming Andrew-AFLEMING <AFLEMING@...escale.com>
---
 drivers/usb/phy/phy-fsl-usb.c | 20 ++++++++++++++++++++
 drivers/usb/phy/phy-fsl-usb.h |  7 +++++++
 2 files changed, 27 insertions(+)

diff --git a/drivers/usb/phy/phy-fsl-usb.c b/drivers/usb/phy/phy-fsl-usb.c
index 94eb292..f90093a 100644
--- a/drivers/usb/phy/phy-fsl-usb.c
+++ b/drivers/usb/phy/phy-fsl-usb.c
@@ -923,12 +923,32 @@ int usb_otg_start(struct platform_device *pdev)
 	temp &= ~(PORTSC_PHY_TYPE_SEL | PORTSC_PTW);
 	switch (pdata->phy_mode) {
 	case FSL_USB2_PHY_ULPI:
+		if (pdata->controller_ver) {
+			/* controller version 1.6 or above */
+			setbits32(&p_otg->dr_mem_map->control,
+				USB_CTRL_ULPI_PHY_CLK_SEL);
+			/*
+			 * Due to controller issue of PHY_CLK_VALID in ULPI
+			 * mode, we set USB_CTRL_USB_EN before checking
+			 * PHY_CLK_VALID, otherwise PHY_CLK_VALID doesn't work.
+			 */
+			clrsetbits_be32(&p_otg->dr_mem_map->control,
+				 USB_CTRL_UTMI_PHY_EN, USB_CTRL_IOENB);
+		}
 		temp |= PORTSC_PTS_ULPI;
 		break;
 	case FSL_USB2_PHY_UTMI_WIDE:
 		temp |= PORTSC_PTW_16BIT;
 		/* fall through */
 	case FSL_USB2_PHY_UTMI:
+		if (pdata->controller_ver) {
+			/* controller version 1.6 or above */
+			setbits32(&p_otg->dr_mem_map->control,
+				 USB_CTRL_UTMI_PHY_EN);
+			/* Delay for UTMI PHY CLK to become stable - 10ms */
+			mdelay(FSL_UTMI_PHY_DLY);
+		}
+		setbits32(&p_otg->dr_mem_map->control, USB_CTRL_UTMI_PHY_EN);
 		temp |= PORTSC_PTS_UTMI;
 		/* fall through */
 	default:
diff --git a/drivers/usb/phy/phy-fsl-usb.h b/drivers/usb/phy/phy-fsl-usb.h
index 2314995..4a78fb3 100644
--- a/drivers/usb/phy/phy-fsl-usb.h
+++ b/drivers/usb/phy/phy-fsl-usb.h
@@ -199,6 +199,13 @@
 /* control Register Bit Masks */
 #define  USB_CTRL_IOENB			(0x1<<2)
 #define  USB_CTRL_ULPI_INT0EN		(0x1<<0)
+#define  USB_CTRL_WU_INT_EN		(0x1<<1)
+#define  USB_CTRL_LINE_STATE_FILTER__EN	(0x1<<3)
+#define  USB_CTRL_KEEP_OTG_ON		(0x1<<4)
+#define  USB_CTRL_OTG_PORT		(0x1<<5)
+#define  USB_CTRL_PLL_RESET		(0x1<<8)
+#define  USB_CTRL_UTMI_PHY_EN		(0x1<<9)
+#define  USB_CTRL_ULPI_PHY_CLK_SEL	(0x1<<10)
 
 /* BCSR5 */
 #define BCSR5_INT_USB			(0x02)
-- 
1.8.3.1

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