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ARM Chumby: Add USB support 

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2011-01-19 13:58:39 +01:00
parent 6e7c00feb1
commit 6729267643
1 changed files with 35 additions and 2 deletions
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37
arch/arm/boards/chumby_falconwing/falconwing.c
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@ -22,6 +22,7 @@
#include <environment.h>
#include <errno.h>
#include <mci.h>
#include <usb/ehci.h>
#include <asm/armlinux.h>
#include <asm/io.h>
#include <generated/mach-types.h>
@ -29,6 +30,7 @@
#include <mach/clock.h>
#include <mach/mci.h>
#include <mach/fb.h>
#include <mach/usb.h>
static struct memory_platform_data ram_pdata = {
.name = "ram0",
@ -197,10 +199,10 @@ static const uint32_t pad_setup[] = {
/* backlight control, to be controled by PWM, here we only want to disable it */
PWM2_GPIO | GPIO_OUT | GPIO_VALUE(0), /* 1 enables, 0 disables the backlight */
/* send a reset signal to the USB hub */
/* USB hub reset (active low) */
AUART1_TX_GPIO | GPIO_OUT | GPIO_VALUE(0),
/* USB power disable (FIXME what level to be switched off) */
/* USB power (active high) */
AUART1_CTS_GPIO | GPIO_OUT | GPIO_VALUE(0),
/* Detecting if a display is connected (0 = display attached) (external pull up) */
@ -298,6 +300,35 @@ static int register_persistant_environment(void)
return devfs_add_partition("disk0.1", 0, cdev->size, DEVFS_PARTITION_FIXED, "env0");
}
static struct ehci_platform_data chumby_usb_pdata = {
.flags = EHCI_HAS_TT,
.hccr_offset = 0x100,
.hcor_offset = 0x140,
};
static struct device_d usb_dev = {
.name = "ehci",
.id = -1,
.map_base = IMX_USB_BASE,
.size = 0x200,
.platform_data = &chumby_usb_pdata,
};
#define GPIO_USB_HUB_RESET 29
#define GPIO_USB_HUB_POWER 26
static void falconwing_init_usb(void)
{
/* power USB hub */
gpio_direction_output(GPIO_USB_HUB_POWER, 1);
mdelay(1);
/* bring USB hub out of reset */
gpio_direction_output(GPIO_USB_HUB_RESET, 1);
imx_usb_phy_enable();
register_device(&usb_dev);
}
static int falconwing_devices_init(void)
{
int i, rc;
@ -313,6 +344,8 @@ static int falconwing_devices_init(void)
register_device(&mci_dev);
register_device(&ldcif_dev);
falconwing_init_usb();
armlinux_add_dram(&sdram_dev);
armlinux_set_bootparams((void*)(sdram_dev.map_base + 0x100));
armlinux_set_architecture(MACH_TYPE_CHUMBY);