This change implements USB client side support into the HTC
Herald board configuration. It uses a similar, but updated
algorithm to initialize the USB as is used in the linwizard
project.
Signed-off-by: Cory Maccarrone <darkstar6262@xxxxxxxxx>
---
arch/arm/mach-omap1/board-htcherald.c | 70 +++++++++++++++++++++++++++++++++
1 files changed, 70 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap1/board-htcherald.c b/arch/arm/mach-omap1/board-htcherald.c
index 5f28a5c..8949570 100644
--- a/arch/arm/mach-omap1/board-htcherald.c
+++ b/arch/arm/mach-omap1/board-htcherald.c
@@ -39,6 +39,7 @@
#include <plat/common.h>
#include <plat/board.h>
#include <plat/keypad.h>
+#include <plat/usb.h>
#include <mach/irqs.h>
@@ -140,6 +141,15 @@ static struct platform_device kp_device = {
.resource = kp_resources,
};
+/* USB Device */
+static struct omap_usb_config htcherald_usb_config __initdata = {
+ .otg = 0,
+ .register_host = 0,
+ .register_dev = 1,
+ .hmc_mode = 4,
+ .pins[0] = 2,
+};
+
/* LCD Device resources */
static struct platform_device lcd_device = {
.name = "lcd_htcherald",
@@ -214,6 +224,63 @@ static void __init htcherald_disable_watchdog(void)
}
}
+#define HTCHERALD_GPIO_USB_EN1 33
+#define HTCHERALD_GPIO_USB_EN2 73
+#define HTCHERALD_GPIO_USB_DM 35
+#define HTCHERALD_GPIO_USB_DP 36
+
+static void __init htcherald_usb_enable(void)
+{
+ unsigned int tries = 20;
+ unsigned int value = 0;
+
+ /* Request the GPIOs we need to control here */
+ if (gpio_request(HTCHERALD_GPIO_USB_EN1, "herald_usb") < 0) {
+ printk(KERN_WARNING "Unable to request HTCHERALD_GPIO_USB_EN1, USB will be unavailable\n");
+ goto done;
+ }
+
+ if (gpio_request(HTCHERALD_GPIO_USB_EN2, "herald_usb") < 0) {
+ printk(KERN_WARNING "Unable to request HTCHERALD_GPIO_USB_EN2, USB will be unavailable\n");
+ goto err1;
+ }
+
+ if (gpio_request(HTCHERALD_GPIO_USB_DM, "herald_usb") < 0) {
+ printk(KERN_WARNING "Unable to request HTCHERALD_GPIO_USB_DM, USB will be unavailable\n");
+ goto err2;
+ }
+
+ if (gpio_request(HTCHERALD_GPIO_USB_DP, "herald_usb") < 0) {
+ printk(KERN_WARNING "Unable to request HTCHERALD_GPIO_USB_DP, USB will be unavailable\n");
+ goto err3;
+ }
+
+ /* force USB_EN GPIO to 0 */
+ do {
+ gpio_direction_output(HTCHERALD_GPIO_USB_EN1, 0); /* output low */
+ } while((value = gpio_get_value(HTCHERALD_GPIO_USB_EN1)) == 1 && --tries);
+
+ if (value == 1) {
+ printk(KERN_WARNING "unable to reset USB_EN GPIO after 20 tries.\n");
+ printk(KERN_WARNING "I will try to continue anyway: USB may not be available.\n");
+ }
+
+ gpio_direction_output(HTCHERALD_GPIO_USB_EN2, 0); /* output low */
+ gpio_direction_input(HTCHERALD_GPIO_USB_DM); /* input */
+ gpio_direction_input(HTCHERALD_GPIO_USB_DP); /* input */
+
+ goto done;
+
+err3:
+ gpio_free(HTCHERALD_GPIO_USB_DM);
+err2:
+ gpio_free(HTCHERALD_GPIO_USB_EN2);
+err1:
+ gpio_free(HTCHERALD_GPIO_USB_EN1);
+done:
+ printk(KERN_INFO "USB setup complete.\n");
+}
+
static void __init htcherald_init(void)
{
printk(KERN_INFO "HTC Herald init.\n");
@@ -225,6 +292,9 @@ static void __init htcherald_init(void)
platform_add_devices(devices, ARRAY_SIZE(devices));
htcherald_disable_watchdog();
+
+ htcherald_usb_enable();
+ omap_usb_init(&htcherald_usb_config);
}
static void __init htcherald_init_irq(void)
--
1.6.3.3
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