fsl/usb: Add controller version based ULPI and UTMI phy support

Add support for ULPI and UTMI PHYs based on usb controller
version info read from device-tree

Example of USB Controller versioning info:
Version 1.2 and below : MPC8536, MPC8315, etc
Version 1.6 : P1020, P1010, P2020, P5020, etc
Version 2.2 : PSC9131, PSC9132, P3060, etc

No changes for non-DT users

Signed-off-by: Ramneek Mehresh <ramneek.mehresh@freescale.com>
Acked-by: Li Yang <leoli@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

3 files changed, 81 insertions, 8 deletions

diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
index 3e7345172e03..653e577ab3ee 100644
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -1,6 +1,6 @@
 /*
  * Copyright 2005-2009 MontaVista Software, Inc.
- * Copyright 2008      Freescale Semiconductor, Inc.
+ * Copyright 2008,2012      Freescale Semiconductor, Inc.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
@@ -211,19 +211,32 @@ static void usb_hcd_fsl_remove(struct usb_hcd *hcd,
 	usb_put_hcd(hcd);
 }
 
-static void ehci_fsl_setup_phy(struct ehci_hcd *ehci,
+static void ehci_fsl_setup_phy(struct usb_hcd *hcd,
 			       enum fsl_usb2_phy_modes phy_mode,
 			       unsigned int port_offset)
 {
-	u32 portsc;
-	struct usb_hcd *hcd = ehci_to_hcd(ehci);
+	u32 portsc, temp;
+	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 	void __iomem *non_ehci = hcd->regs;
+	struct device *dev = hcd->self.controller;
+	struct fsl_usb2_platform_data *pdata = dev->platform_data;
+
+	if (pdata->controller_ver < 0) {
+		dev_warn(hcd->self.controller, "Could not get controller version\n");
+		return;
+	}
 
 	portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]);
 	portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW);
 
 	switch (phy_mode) {
 	case FSL_USB2_PHY_ULPI:
+		if (pdata->controller_ver) {
+			/* controller version 1.6 or above */
+			temp = in_be32(non_ehci + FSL_SOC_USB_CTRL);
+			out_be32(non_ehci + FSL_SOC_USB_CTRL, temp |
+				USB_CTRL_USB_EN | ULPI_PHY_CLK_SEL);
+		}
 		portsc |= PORT_PTS_ULPI;
 		break;
 	case FSL_USB2_PHY_SERIAL:
@@ -233,6 +246,14 @@ static void ehci_fsl_setup_phy(struct ehci_hcd *ehci,
 		portsc |= PORT_PTS_PTW;
 		/* fall through */
 	case FSL_USB2_PHY_UTMI:
+		if (pdata->controller_ver) {
+			/* controller version 1.6 or above */
+			temp = in_be32(non_ehci + FSL_SOC_USB_CTRL);
+			out_be32(non_ehci + FSL_SOC_USB_CTRL, temp |
+				UTMI_PHY_EN | USB_CTRL_USB_EN);
+			mdelay(FSL_UTMI_PHY_DLY);  /* Delay for UTMI PHY CLK to
+						become stable - 10ms*/
+		}
 		/* enable UTMI PHY */
 		setbits32(non_ehci + FSL_SOC_USB_CTRL, CTRL_UTMI_PHY_EN);
 		portsc |= PORT_PTS_UTMI;
@@ -271,7 +292,7 @@ static void ehci_fsl_usb_setup(struct ehci_hcd *ehci)
 
 	if ((pdata->operating_mode == FSL_USB2_DR_HOST) ||
 			(pdata->operating_mode == FSL_USB2_DR_OTG))
-		ehci_fsl_setup_phy(ehci, pdata->phy_mode, 0);
+		ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0);
 
 	if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
 		unsigned int chip, rev, svr;
@@ -285,9 +306,9 @@ static void ehci_fsl_usb_setup(struct ehci_hcd *ehci)
 			ehci->has_fsl_port_bug = 1;
 
 		if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
-			ehci_fsl_setup_phy(ehci, pdata->phy_mode, 0);
+			ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0);
 		if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
-			ehci_fsl_setup_phy(ehci, pdata->phy_mode, 1);
+			ehci_fsl_setup_phy(hcd, pdata->phy_mode, 1);
 	}
 
 	if (pdata->have_sysif_regs) {
diff --git a/drivers/usb/host/ehci-fsl.h b/drivers/usb/host/ehci-fsl.h
index 863fb0c080d7..88403684d10b 100644
--- a/drivers/usb/host/ehci-fsl.h
+++ b/drivers/usb/host/ehci-fsl.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2005-2010 Freescale Semiconductor, Inc.
+/* Copyright (C) 2005-2010,2012 Freescale Semiconductor, Inc.
  * Copyright (c) 2005 MontaVista Software
  *
  * This program is free software; you can redistribute  it and/or modify it
@@ -50,4 +50,15 @@
 #define CTRL_UTMI_PHY_EN	(1<<9)
 #define CTRL_PHY_CLK_VALID	(1 << 17)
 #define SNOOP_SIZE_2GB		0x1e
+
+/* control Register Bit Masks */
+#define ULPI_INT_EN             (1<<0)
+#define WU_INT_EN               (1<<1)
+#define USB_CTRL_USB_EN         (1<<2)
+#define LINE_STATE_FILTER__EN   (1<<3)
+#define KEEP_OTG_ON             (1<<4)
+#define OTG_PORT                (1<<5)
+#define PLL_RESET               (1<<8)
+#define UTMI_PHY_EN             (1<<9)
+#define ULPI_PHY_CLK_SEL        (1<<10)
 #endif				/* _EHCI_FSL_H */
diff --git a/drivers/usb/host/fsl-mph-dr-of.c b/drivers/usb/host/fsl-mph-dr-of.c
index ab333ac6071d..22ff6b3a676f 100644
--- a/drivers/usb/host/fsl-mph-dr-of.c
+++ b/drivers/usb/host/fsl-mph-dr-of.c
@@ -119,6 +119,39 @@ error:
 
 static const struct of_device_id fsl_usb2_mph_dr_of_match[];
 
+static int usb_get_ver_info(struct device_node *np)
+{
+	int ver = -1;
+
+	/*
+	 * returns 1 for usb controller version 1.6
+	 * returns 2 for usb controller version 2.2
+	 * returns 0 otherwise
+	 */
+	if (of_device_is_compatible(np, "fsl-usb2-dr")) {
+		if (of_device_is_compatible(np, "fsl-usb2-dr-v1.6"))
+			ver = FSL_USB_VER_1_6;
+		else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.2"))
+			ver = FSL_USB_VER_2_2;
+		else /* for previous controller versions */
+			ver = FSL_USB_VER_OLD;
+
+		if (ver > -1)
+			return ver;
+	}
+
+	if (of_device_is_compatible(np, "fsl-usb2-mph")) {
+		if (of_device_is_compatible(np, "fsl-usb2-mph-v1.6"))
+			ver = FSL_USB_VER_1_6;
+		else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.2"))
+			ver = FSL_USB_VER_2_2;
+		else /* for previous controller versions */
+			ver = FSL_USB_VER_OLD;
+	}
+
+	return ver;
+}
+
 static int __devinit fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev)
 {
 	struct device_node *np = ofdev->dev.of_node;
@@ -166,6 +199,14 @@ static int __devinit fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev)
 
 	prop = of_get_property(np, "phy_type", NULL);
 	pdata->phy_mode = determine_usb_phy(prop);
+	pdata->controller_ver = usb_get_ver_info(np);
+
+	if (pdata->have_sysif_regs) {
+		if (pdata->controller_ver < 0) {
+			dev_warn(&ofdev->dev, "Could not get controller version\n");
+			return -ENODEV;
+		}
+	}
 
 	for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) {
 		if (!dev_data->drivers[i])