From f8f10f496bce396416d7156da876222c6ce8c341 Mon Sep 17 00:00:00 2001
From: Steven Kipisz <skipisz@beagleboard.org>
Date: Wed, 9 Jan 2009 12:01:11 -0600
Subject: [PATCH-USB] Omap3 beagleboard: add support for EHCI in revision C1 boards

Signed-off-by: Jason Kridner <jkridner@beagleboard.org>
---
 arch/arm/mach-omap2/board-omap3beagle.c |   10 +---------
 arch/arm/mach-omap2/usb-ehci.c          |    4 +---
 drivers/usb/host/ehci-omap.c            |   26 ++++++++++++++++++++++++++
 3 files changed, 28 insertions(+), 12 deletions(-)

diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c
index fe97bab..de81153 100644
--- a/arch/arm/mach-omap2/board-omap3beagle.c
+++ b/arch/arm/mach-omap2/board-omap3beagle.c
@@ -140,15 +140,7 @@ static int beagle_twl_gpio_setup(struct device *dev,
 	 * power switch and overcurrent detect
 	 */
 
-	gpio_request(gpio + 1, "EHCI_nOC");
-	gpio_direction_input(gpio + 1);
-
-	/* TWL4030_GPIO_MAX + 0 == ledA, EHCI nEN_USB_PWR (out, active low) */
-	gpio_request(gpio + TWL4030_GPIO_MAX, "nEN_USB_PWR");
-	gpio_direction_output(gpio + TWL4030_GPIO_MAX, 1);
-
-	/* TWL4030_GPIO_MAX + 1 == ledB, PMU_STAT (out, active low LED) */
-	gpio_leds[2].gpio = gpio + TWL4030_GPIO_MAX + 1;
+        /* TODO: This needs to be modified to not rely on u-boot */
 
 	return 0;
 }
diff --git a/arch/arm/mach-omap2/usb-ehci.c b/arch/arm/mach-omap2/usb-ehci.c
index 489439d..2c6305b 100644
--- a/arch/arm/mach-omap2/usb-ehci.c
+++ b/arch/arm/mach-omap2/usb-ehci.c
@@ -152,9 +152,7 @@ static void setup_ehci_io_mux(void)
 void __init usb_ehci_init(void)
 {
 #if     defined(CONFIG_USB_EHCI_HCD) || defined(CONFIG_USB_EHCI_HCD_MODULE)
-	/* Setup Pin IO MUX for EHCI */
-	if (cpu_is_omap34xx())
-		setup_ehci_io_mux();
+	/* TODO: Setup Pin IO MUX for EHCI - moved this temporarily to U-boot */
 
 	if (platform_device_register(&ehci_device) < 0) {
 		printk(KERN_ERR "Unable to register HS-USB (EHCI) device\n");

diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
index 1b3266c..8472996 100644
--- a/drivers/usb/host/ehci-omap.c
+++ b/drivers/usb/host/ehci-omap.c
@@ -48,16 +48,26 @@
  *		to get the PHY state machine in working state
  */
 #define EXTERNAL_PHY_RESET
+#ifdef CONFIG_MACH_OMAP3_BEAGLE
+#define	EXT_PHY_RESET_GPIO_PORT2	(147)
+#else
 #define	EXT_PHY_RESET_GPIO_PORT1	(57)
 #define	EXT_PHY_RESET_GPIO_PORT2	(61)
+#endif
 #define	EXT_PHY_RESET_DELAY		(10)
 
+#define PHY_STP_PULLUP_ENABLE           (0x10)
+#define PHY_STP_PULLUP_DISABLE          (0x90)
+
+
 /* ISSUE2:
  * USBHOST supports External charge pump PHYs only
  * Use the VBUS from Port1 to power VBUS of Port2 externally
  * So use Port2 as the working ULPI port
  */
+#ifndef CONFIG_MACH_OMAP3_BEAGLE
 #define VBUS_INTERNAL_CHARGEPUMP_HACK
+#endif
 
 #endif /* CONFIG_OMAP_EHCI_PHY_MODE */
 
@@ -225,14 +235,43 @@ static int omap_start_ehc(struct platform_device *dev, struct usb_hcd *hcd)
 
 #ifdef EXTERNAL_PHY_RESET
 	/* Refer: ISSUE1 */
+#ifndef CONFIG_MACH_OMAP3_BEAGLE
 	gpio_request(EXT_PHY_RESET_GPIO_PORT1, "USB1 PHY reset");
 	gpio_direction_output(EXT_PHY_RESET_GPIO_PORT1, 0);
+#endif
 	gpio_request(EXT_PHY_RESET_GPIO_PORT2, "USB2 PHY reset");
 	gpio_direction_output(EXT_PHY_RESET_GPIO_PORT2, 0);
+	gpio_set_value(EXT_PHY_RESET_GPIO_PORT2, 0);
 	/* Hold the PHY in RESET for enough time till DIR is high */
 	udelay(EXT_PHY_RESET_DELAY);
 #endif
 
+        /*
+         * The PHY register 0x7 - Interface Control register is
+         * configured to disable the integrated STP pull-up resistor
+         * used for interface protection.
+	 *
+	 * May not need to be here.
+         */
+        omap_writel((0x7 << EHCI_INSNREG05_ULPI_REGADD_SHIFT) |/* interface reg */
+                (2 << EHCI_INSNREG05_ULPI_OPSEL_SHIFT) |/*   Write */
+                (1 << EHCI_INSNREG05_ULPI_PORTSEL_SHIFT) |/* Port1 */
+                (1 << EHCI_INSNREG05_ULPI_CONTROL_SHIFT) |/* Start */
+                (PHY_STP_PULLUP_DISABLE),
+                EHCI_INSNREG05_ULPI);
+
+        while (!(omap_readl(EHCI_INSNREG05_ULPI) & (1<<EHCI_INSNREG05_ULPI_CONTROL_SHIFT)));
+
+        /* Force PHY to HS */
+        omap_writel((0x4 << EHCI_INSNREG05_ULPI_REGADD_SHIFT) |/* function ctrl */
+                (2 << EHCI_INSNREG05_ULPI_OPSEL_SHIFT) |/*   Write */
+                (1 << EHCI_INSNREG05_ULPI_PORTSEL_SHIFT) |/* Port1 */
+                (1 << EHCI_INSNREG05_ULPI_CONTROL_SHIFT) |/* Start */
+                (0x40),
+                EHCI_INSNREG05_ULPI);
+
+        while (!(omap_readl(EHCI_INSNREG05_ULPI) & (1<<EHCI_INSNREG05_ULPI_CONTROL_SHIFT)));
+
 	/* Configure TLL for 60Mhz clk for ULPI */
 	ehci_clocks->usbtll_fck_clk = clk_get(&dev->dev, USBHOST_TLL_FCLK);
 	if (IS_ERR(ehci_clocks->usbtll_fck_clk))
@@ -307,7 +346,9 @@ static int omap_start_ehc(struct platform_device *dev, struct usb_hcd *hcd)
 	 * Hold the PHY in RESET for enough time till PHY is settled and ready
 	 */
 	udelay(EXT_PHY_RESET_DELAY);
+#ifndef CONFIG_MACH_OMAP3_BEAGLE
 	gpio_set_value(EXT_PHY_RESET_GPIO_PORT1, 1);
+#endif
 	gpio_set_value(EXT_PHY_RESET_GPIO_PORT2, 1);
 #endif
 
@@ -393,7 +434,9 @@ static void omap_stop_ehc(struct platform_device *dev, struct usb_hcd *hcd)
 
 
 #ifdef EXTERNAL_PHY_RESET
+#ifndef CONFIG_MACH_OMAP3_BEAGLE
 	gpio_free(EXT_PHY_RESET_GPIO_PORT1);
+#endif
 	gpio_free(EXT_PHY_RESET_GPIO_PORT2);
 #endif

--
1.6.0.4.790.gaa14a 
