diff options
| author | David Anders <x0132446@ti.com> | 2010-10-07 23:36:30 +0400 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2010-10-08 22:07:00 +0400 |
| commit | 4415beb6fb519c4e98491666838494a8c46cc3ee (patch) | |
| tree | 0d5a4a38f138534fb8310dc18909bd8f38273fa4 /arch/arm | |
| parent | b9b52620823f84f95f3fd94dd6769b7102d7888a (diff) | |
| download | linux-4415beb6fb519c4e98491666838494a8c46cc3ee.tar.xz | |
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>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-omap2/board-omap4panda.c | 54 |
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 e9c6b24361bc..5eb1a77bf0e5 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); |