Commit 106997c1 authored by Cory Maccarrone's avatar Cory Maccarrone Committed by Tony Lindgren

omap1: Add omap7xx USB support

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: default avatarCory Maccarrone <darkstar6262@gmail.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent f8e9e984
...@@ -39,6 +39,7 @@ ...@@ -39,6 +39,7 @@
#include <plat/common.h> #include <plat/common.h>
#include <plat/board.h> #include <plat/board.h>
#include <plat/keypad.h> #include <plat/keypad.h>
#include <plat/usb.h>
#include <mach/irqs.h> #include <mach/irqs.h>
...@@ -140,6 +141,15 @@ static struct platform_device kp_device = { ...@@ -140,6 +141,15 @@ static struct platform_device kp_device = {
.resource = kp_resources, .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 */ /* LCD Device resources */
static struct platform_device lcd_device = { static struct platform_device lcd_device = {
.name = "lcd_htcherald", .name = "lcd_htcherald",
...@@ -214,6 +224,57 @@ static void __init htcherald_disable_watchdog(void) ...@@ -214,6 +224,57 @@ 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)
goto err1;
if (gpio_request(HTCHERALD_GPIO_USB_EN2, "herald_usb") < 0)
goto err2;
if (gpio_request(HTCHERALD_GPIO_USB_DM, "herald_usb") < 0)
goto err3;
if (gpio_request(HTCHERALD_GPIO_USB_DP, "herald_usb") < 0)
goto err4;
/* force USB_EN GPIO to 0 */
do {
/* output low */
gpio_direction_output(HTCHERALD_GPIO_USB_EN1, 0);
} while ((value = gpio_get_value(HTCHERALD_GPIO_USB_EN1)) == 1 &&
--tries);
if (value == 1)
printk(KERN_WARNING "Unable to reset USB, trying to continue\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;
err4:
gpio_free(HTCHERALD_GPIO_USB_DM);
err3:
gpio_free(HTCHERALD_GPIO_USB_EN2);
err2:
gpio_free(HTCHERALD_GPIO_USB_EN1);
err1:
printk(KERN_ERR "Unabled to request GPIO for USB\n");
done:
printk(KERN_INFO "USB setup complete.\n");
}
static void __init htcherald_init(void) static void __init htcherald_init(void)
{ {
printk(KERN_INFO "HTC Herald init.\n"); printk(KERN_INFO "HTC Herald init.\n");
...@@ -225,6 +286,9 @@ static void __init htcherald_init(void) ...@@ -225,6 +286,9 @@ static void __init htcherald_init(void)
platform_add_devices(devices, ARRAY_SIZE(devices)); platform_add_devices(devices, ARRAY_SIZE(devices));
htcherald_disable_watchdog(); htcherald_disable_watchdog();
htcherald_usb_enable();
omap_usb_init(&htcherald_usb_config);
} }
static void __init htcherald_init_irq(void) static void __init htcherald_init_irq(void)
......
...@@ -50,7 +50,9 @@ MUX_CFG_7XX("E3_7XX_KBC4", 13, 25, 0, 24, 1, 0) ...@@ -50,7 +50,9 @@ MUX_CFG_7XX("E3_7XX_KBC4", 13, 25, 0, 24, 1, 0)
MUX_CFG_7XX("AA17_7XX_USB_DM", 2, 21, 0, 20, 0, 0) MUX_CFG_7XX("AA17_7XX_USB_DM", 2, 21, 0, 20, 0, 0)
MUX_CFG_7XX("W16_7XX_USB_PU_EN", 2, 25, 0, 24, 0, 0) MUX_CFG_7XX("W16_7XX_USB_PU_EN", 2, 25, 0, 24, 0, 0)
MUX_CFG_7XX("W17_7XX_USB_VBUSI", 2, 29, 0, 28, 0, 0) MUX_CFG_7XX("W17_7XX_USB_VBUSI", 2, 29, 6, 28, 1, 0)
MUX_CFG_7XX("W18_7XX_USB_DMCK_OUT",3, 3, 1, 2, 0, 0)
MUX_CFG_7XX("W19_7XX_USB_DCRST", 3, 7, 1, 6, 0, 0)
/* MMC Pins */ /* MMC Pins */
MUX_CFG_7XX("MMC_7XX_CMD", 2, 9, 0, 8, 1, 0) MUX_CFG_7XX("MMC_7XX_CMD", 2, 9, 0, 8, 1, 0)
......
...@@ -172,6 +172,8 @@ enum omap7xx_index { ...@@ -172,6 +172,8 @@ enum omap7xx_index {
AA17_7XX_USB_DM, AA17_7XX_USB_DM,
W16_7XX_USB_PU_EN, W16_7XX_USB_PU_EN,
W17_7XX_USB_VBUSI, W17_7XX_USB_VBUSI,
W18_7XX_USB_DMCK_OUT,
W19_7XX_USB_DCRST,
/* MMC */ /* MMC */
MMC_7XX_CMD, MMC_7XX_CMD,
......
...@@ -137,7 +137,13 @@ static u32 __init omap_usb0_init(unsigned nwires, unsigned is_device) ...@@ -137,7 +137,13 @@ static u32 __init omap_usb0_init(unsigned nwires, unsigned is_device)
if (is_device) { if (is_device) {
if (cpu_is_omap24xx()) if (cpu_is_omap24xx())
omap_cfg_reg(J20_24XX_USB0_PUEN); omap_cfg_reg(J20_24XX_USB0_PUEN);
else else if (cpu_is_omap7xx()) {
omap_cfg_reg(AA17_7XX_USB_DM);
omap_cfg_reg(W16_7XX_USB_PU_EN);
omap_cfg_reg(W17_7XX_USB_VBUSI);
omap_cfg_reg(W18_7XX_USB_DMCK_OUT);
omap_cfg_reg(W19_7XX_USB_DCRST);
} else
omap_cfg_reg(W4_USB_PUEN); omap_cfg_reg(W4_USB_PUEN);
} }
......
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