omap4: pandaboard: enable the ehci port on pandaboard

The OMAP4 PandaBoard has EHCI port1 hooked up to an external
SMSC3320 transciever. GPIO 1 is used to power on the transceiver
and GPIO 62 for reset on the transceiver.

Signed-off-by: David Anders <x0132446@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/board-omap4panda.c b/arch/arm/mach-omap2/board-omap4panda.c
index e9c6b24361b..5eb1a77bf0e 100644
--- a/arch/arm/mach-omap2/board-omap4panda.c
+++ b/arch/arm/mach-omap2/board-omap4panda.c
@@ -41,6 +41,9 @@
 #include "timer-gp.h"
 
 
+#define GPIO_HUB_POWER          1
+#define GPIO_HUB_NRESET         62
+
 static struct gpio_led gpio_leds[] = {
         {
                 .name                   = "pandaboard::status1",
@@ -78,6 +81,56 @@ static void __init omap4_panda_init_irq(void)
         omap_gpio_init();
 }
 
+static const struct ehci_hcd_omap_platform_data ehci_pdata __initconst = {
+        .port_mode[0] = EHCI_HCD_OMAP_MODE_PHY,
+        .port_mode[1] = EHCI_HCD_OMAP_MODE_UNKNOWN,
+        .port_mode[2] = EHCI_HCD_OMAP_MODE_UNKNOWN,
+        .phy_reset  = false,
+        .reset_gpio_port[0]  = -EINVAL,
+        .reset_gpio_port[1]  = -EINVAL,
+        .reset_gpio_port[2]  = -EINVAL
+};
+
+static void __init omap4_ehci_init(void)
+{
+        int ret;
+
+
+        /* disable the power to the usb hub prior to init */
+        ret = gpio_request(GPIO_HUB_POWER, "hub_power");
+        if (ret) {
+                pr_err("Cannot request GPIO %d\n", GPIO_HUB_POWER);
+                goto error1;
+        }
+        gpio_export(GPIO_HUB_POWER, 0);
+        gpio_direction_output(GPIO_HUB_POWER, 0);
+        gpio_set_value(GPIO_HUB_POWER, 0);
+
+        /* reset phy+hub */
+        ret = gpio_request(GPIO_HUB_NRESET, "hub_nreset");
+        if (ret) {
+                pr_err("Cannot request GPIO %d\n", GPIO_HUB_NRESET);
+                goto error2;
+        }
+        gpio_export(GPIO_HUB_NRESET, 0);
+        gpio_direction_output(GPIO_HUB_NRESET, 0);
+        gpio_set_value(GPIO_HUB_NRESET, 0);
+        gpio_set_value(GPIO_HUB_NRESET, 1);
+
+        usb_ehci_init(&ehci_pdata);
+
+        /* enable power to hub */
+        gpio_set_value(GPIO_HUB_POWER, 1);
+        return;
+
+error2:
+        gpio_free(GPIO_HUB_POWER);
+error1:
+        pr_err("Unable to initialize EHCI power/reset\n");
+        return;
+
+}
+
 static struct omap_musb_board_data musb_board_data = {
         .interface_type         = MUSB_INTERFACE_UTMI,
         .mode                   = MUSB_PERIPHERAL,
@@ -314,6 +367,7 @@ static void __init omap4_panda_init(void)
         omap4_twl6030_hsmmc_init(mmc);
         /* OMAP4 Panda uses internal transceiver so register nop transceiver */
         usb_nop_xceiv_register();
+        omap4_ehci_init();
         /* FIXME: allow multi-omap to boot until musb is updated for omap4 */
         if (!cpu_is_omap44xx())
                 usb_musb_init(&musb_board_data);