1 From f8f10f496bce396416d7156da876222c6ce8c341 Mon Sep 17 00:00:00 2001
2 From: Steven Kipisz <skipisz@beagleboard.org>
3 Date: Wed, 9 Jan 2009 12:01:11 -0600
4 Subject: [PATCH-USB] Omap3 beagleboard: add support for EHCI in revision C1 boards
6 Signed-off-by: Jason Kridner <jkridner@beagleboard.org>
8 arch/arm/mach-omap2/board-omap3beagle.c | 10 +---------
9 arch/arm/mach-omap2/usb-ehci.c | 4 +---
10 drivers/usb/host/ehci-omap.c | 26 ++++++++++++++++++++++++++
11 3 files changed, 28 insertions(+), 12 deletions(-)
13 diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c
14 index fe97bab..de81153 100644
15 --- a/arch/arm/mach-omap2/board-omap3beagle.c
16 +++ b/arch/arm/mach-omap2/board-omap3beagle.c
17 @@ -140,15 +140,7 @@ static int beagle_twl_gpio_setup(struct device *dev,
18 * power switch and overcurrent detect
21 - gpio_request(gpio + 1, "EHCI_nOC");
22 - gpio_direction_input(gpio + 1);
24 - /* TWL4030_GPIO_MAX + 0 == ledA, EHCI nEN_USB_PWR (out, active low) */
25 - gpio_request(gpio + TWL4030_GPIO_MAX, "nEN_USB_PWR");
26 - gpio_direction_output(gpio + TWL4030_GPIO_MAX, 1);
28 - /* TWL4030_GPIO_MAX + 1 == ledB, PMU_STAT (out, active low LED) */
29 - gpio_leds[2].gpio = gpio + TWL4030_GPIO_MAX + 1;
30 + /* TODO: This needs to be modified to not rely on u-boot */
34 diff --git a/arch/arm/mach-omap2/usb-ehci.c b/arch/arm/mach-omap2/usb-ehci.c
35 index 489439d..2c6305b 100644
36 --- a/arch/arm/mach-omap2/usb-ehci.c
37 +++ b/arch/arm/mach-omap2/usb-ehci.c
38 @@ -152,9 +152,7 @@ static void setup_ehci_io_mux(void)
39 void __init usb_ehci_init(void)
41 #if defined(CONFIG_USB_EHCI_HCD) || defined(CONFIG_USB_EHCI_HCD_MODULE)
42 - /* Setup Pin IO MUX for EHCI */
43 - if (cpu_is_omap34xx())
44 - setup_ehci_io_mux();
45 + /* TODO: Setup Pin IO MUX for EHCI - moved this temporarily to U-boot */
47 if (platform_device_register(&ehci_device) < 0) {
48 printk(KERN_ERR "Unable to register HS-USB (EHCI) device\n");
50 diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
51 index 1b3266c..8472996 100644
52 --- a/drivers/usb/host/ehci-omap.c
53 +++ b/drivers/usb/host/ehci-omap.c
55 * to get the PHY state machine in working state
57 #define EXTERNAL_PHY_RESET
58 +#ifdef CONFIG_MACH_OMAP3_BEAGLE
59 +#define EXT_PHY_RESET_GPIO_PORT2 (147)
61 #define EXT_PHY_RESET_GPIO_PORT1 (57)
62 #define EXT_PHY_RESET_GPIO_PORT2 (61)
64 #define EXT_PHY_RESET_DELAY (10)
66 +#define PHY_STP_PULLUP_ENABLE (0x10)
67 +#define PHY_STP_PULLUP_DISABLE (0x90)
71 * USBHOST supports External charge pump PHYs only
72 * Use the VBUS from Port1 to power VBUS of Port2 externally
73 * So use Port2 as the working ULPI port
75 +#ifndef CONFIG_MACH_OMAP3_BEAGLE
76 #define VBUS_INTERNAL_CHARGEPUMP_HACK
79 #endif /* CONFIG_OMAP_EHCI_PHY_MODE */
81 @@ -225,14 +235,43 @@ static int omap_start_ehc(struct platform_device *dev, struct usb_hcd *hcd)
83 #ifdef EXTERNAL_PHY_RESET
85 +#ifndef CONFIG_MACH_OMAP3_BEAGLE
86 gpio_request(EXT_PHY_RESET_GPIO_PORT1, "USB1 PHY reset");
87 gpio_direction_output(EXT_PHY_RESET_GPIO_PORT1, 0);
89 gpio_request(EXT_PHY_RESET_GPIO_PORT2, "USB2 PHY reset");
90 gpio_direction_output(EXT_PHY_RESET_GPIO_PORT2, 0);
91 + gpio_set_value(EXT_PHY_RESET_GPIO_PORT2, 0);
92 /* Hold the PHY in RESET for enough time till DIR is high */
93 udelay(EXT_PHY_RESET_DELAY);
97 + * The PHY register 0x7 - Interface Control register is
98 + * configured to disable the integrated STP pull-up resistor
99 + * used for interface protection.
101 + * May not need to be here.
103 + omap_writel((0x7 << EHCI_INSNREG05_ULPI_REGADD_SHIFT) |/* interface reg */
104 + (2 << EHCI_INSNREG05_ULPI_OPSEL_SHIFT) |/* Write */
105 + (1 << EHCI_INSNREG05_ULPI_PORTSEL_SHIFT) |/* Port1 */
106 + (1 << EHCI_INSNREG05_ULPI_CONTROL_SHIFT) |/* Start */
107 + (PHY_STP_PULLUP_DISABLE),
108 + EHCI_INSNREG05_ULPI);
110 + while (!(omap_readl(EHCI_INSNREG05_ULPI) & (1<<EHCI_INSNREG05_ULPI_CONTROL_SHIFT)));
112 + /* Force PHY to HS */
113 + omap_writel((0x4 << EHCI_INSNREG05_ULPI_REGADD_SHIFT) |/* function ctrl */
114 + (2 << EHCI_INSNREG05_ULPI_OPSEL_SHIFT) |/* Write */
115 + (1 << EHCI_INSNREG05_ULPI_PORTSEL_SHIFT) |/* Port1 */
116 + (1 << EHCI_INSNREG05_ULPI_CONTROL_SHIFT) |/* Start */
118 + EHCI_INSNREG05_ULPI);
120 + while (!(omap_readl(EHCI_INSNREG05_ULPI) & (1<<EHCI_INSNREG05_ULPI_CONTROL_SHIFT)));
122 /* Configure TLL for 60Mhz clk for ULPI */
123 ehci_clocks->usbtll_fck_clk = clk_get(&dev->dev, USBHOST_TLL_FCLK);
124 if (IS_ERR(ehci_clocks->usbtll_fck_clk))
125 @@ -307,7 +346,9 @@ static int omap_start_ehc(struct platform_device *dev, struct usb_hcd *hcd)
126 * Hold the PHY in RESET for enough time till PHY is settled and ready
128 udelay(EXT_PHY_RESET_DELAY);
129 +#ifndef CONFIG_MACH_OMAP3_BEAGLE
130 gpio_set_value(EXT_PHY_RESET_GPIO_PORT1, 1);
132 gpio_set_value(EXT_PHY_RESET_GPIO_PORT2, 1);
135 @@ -393,7 +434,9 @@ static void omap_stop_ehc(struct platform_device *dev, struct usb_hcd *hcd)
138 #ifdef EXTERNAL_PHY_RESET
139 +#ifndef CONFIG_MACH_OMAP3_BEAGLE
140 gpio_free(EXT_PHY_RESET_GPIO_PORT1);
142 gpio_free(EXT_PHY_RESET_GPIO_PORT2);