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authorMike Rapoport <mike@compulab.co.il>2009-05-12 16:31:16 +0300
committerEric Miao <eric.y.miao@gmail.com>2009-06-05 10:50:25 +0800
commit128d88b82e47d070170c256b2b19f57c352af310 (patch)
tree6a135607b91b4804691583f9f505db080d5091d8 /arch
parent3690a0f4266127557524501c680760b1e6cb55d0 (diff)
downloadtalos-obmc-linux-128d88b82e47d070170c256b2b19f57c352af310.tar.gz
talos-obmc-linux-128d88b82e47d070170c256b2b19f57c352af310.zip
[ARM] pxa/em-x270: add support for on-board USB Hub
Signed-off-by: Mike Rapoport <mike@compulab.co.il> Signed-off-by: Eric Miao <eric.miao@marvell.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-pxa/em-x270.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/em-x270.c b/arch/arm/mach-pxa/em-x270.c
index 35a12038dc0b..3ff1fec017fd 100644
--- a/arch/arm/mach-pxa/em-x270.c
+++ b/arch/arm/mach-pxa/em-x270.c
@@ -55,6 +55,7 @@
#define GPIO95_MMC_WP (95)
#define GPIO56_NAND_RB (56)
#define GPIO93_CAM_RESET (93)
+#define GPIO16_USB_HUB_RESET (16)
/* eXeda specific GPIOs */
#define GPIO114_MMC_CD (114)
@@ -63,6 +64,7 @@
#define GPIO37_WLAN_RST (37)
#define GPIO95_TOUCHPAD_INT (95)
#define GPIO130_CAM_RESET (130)
+#define GPIO10_USB_HUB_RESET (10)
/* common GPIOs */
#define GPIO11_NAND_CS (11)
@@ -70,11 +72,13 @@
#define EM_X270_ETHIRQ IRQ_GPIO(GPIO41_ETHIRQ)
#define GPIO115_WLAN_PWEN (115)
#define GPIO19_WLAN_STRAP (19)
+#define GPIO9_USB_VBUS_EN (9)
static int mmc_cd;
static int nand_rb;
static int dm9000_flags;
static int cam_reset;
+static int usb_hub_reset;
static unsigned long common_pin_config[] = {
/* AC'97 */
@@ -197,12 +201,14 @@ static unsigned long common_pin_config[] = {
static unsigned long em_x270_pin_config[] = {
GPIO13_GPIO, /* MMC card detect */
+ GPIO16_GPIO, /* USB hub reset */
GPIO56_GPIO, /* NAND Ready/Busy */
GPIO93_GPIO | MFP_LPM_DRIVE_LOW, /* Camera reset */
GPIO95_GPIO, /* MMC Write protect */
};
static unsigned long exeda_pin_config[] = {
+ GPIO10_GPIO, /* USB hub reset */
GPIO20_GPIO, /* NAND Ready/Busy */
GPIO38_GPIO | MFP_LPM_DRIVE_LOW, /* SD slot power */
GPIO95_GPIO, /* touchpad IRQ */
@@ -471,18 +477,79 @@ static inline void em_x270_init_nor(void) {}
/* PXA27x OHCI controller setup */
#if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
+static struct regulator *em_x270_usb_ldo;
+
+static int em_x270_usb_hub_init(void)
+{
+ int err;
+
+ em_x270_usb_ldo = regulator_get(NULL, "vcc usb");
+ if (IS_ERR(em_x270_usb_ldo))
+ return PTR_ERR(em_x270_usb_ldo);
+
+ err = gpio_request(GPIO9_USB_VBUS_EN, "vbus en");
+ if (err)
+ goto err_free_usb_ldo;
+
+ err = gpio_request(usb_hub_reset, "hub rst");
+ if (err)
+ goto err_free_vbus_gpio;
+
+ /* USB Hub power-on and reset */
+ gpio_direction_output(usb_hub_reset, 0);
+ regulator_enable(em_x270_usb_ldo);
+ gpio_set_value(usb_hub_reset, 1);
+ gpio_set_value(usb_hub_reset, 0);
+ regulator_disable(em_x270_usb_ldo);
+ regulator_enable(em_x270_usb_ldo);
+ gpio_set_value(usb_hub_reset, 1);
+
+ /* enable VBUS */
+ gpio_direction_output(GPIO9_USB_VBUS_EN, 1);
+
+ return 0;
+
+err_free_vbus_gpio:
+ gpio_free(GPIO9_USB_VBUS_EN);
+err_free_usb_ldo:
+ regulator_put(em_x270_usb_ldo);
+
+ return err;
+}
+
static int em_x270_ohci_init(struct device *dev)
{
+ int err;
+
+ /* we don't want to entirely disable USB if the HUB init failed */
+ err = em_x270_usb_hub_init();
+ if (err)
+ pr_err("USB Hub initialization failed: %d\n", err);
+
/* enable port 2 transiever */
UP2OCR = UP2OCR_HXS | UP2OCR_HXOE;
return 0;
}
+static void em_x270_ohci_exit(struct device *dev)
+{
+ gpio_free(usb_hub_reset);
+ gpio_free(GPIO9_USB_VBUS_EN);
+
+ if (!IS_ERR(em_x270_usb_ldo)) {
+ if (regulator_is_enabled(em_x270_usb_ldo))
+ regulator_disable(em_x270_usb_ldo);
+
+ regulator_put(em_x270_usb_ldo);
+ }
+}
+
static struct pxaohci_platform_data em_x270_ohci_platform_data = {
.port_mode = PMM_PERPORT_MODE,
.flags = ENABLE_PORT1 | ENABLE_PORT2 | POWER_CONTROL_LOW,
.init = em_x270_ohci_init,
+ .exit = em_x270_ohci_exit,
};
static void __init em_x270_init_ohci(void)
@@ -1129,6 +1196,7 @@ static void __init em_x270_module_init(void)
nand_rb = GPIO56_NAND_RB;
dm9000_flags = DM9000_PLATF_32BITONLY;
cam_reset = GPIO93_CAM_RESET;
+ usb_hub_reset = GPIO16_USB_HUB_RESET;
}
static void __init em_x270_exeda_init(void)
@@ -1140,6 +1208,7 @@ static void __init em_x270_exeda_init(void)
nand_rb = GPIO20_NAND_RB;
dm9000_flags = DM9000_PLATF_16BITONLY;
cam_reset = GPIO130_CAM_RESET;
+ usb_hub_reset = GPIO10_USB_HUB_RESET;
}
static void __init em_x270_init(void)
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