From 128d88b82e47d070170c256b2b19f57c352af310 Mon Sep 17 00:00:00 2001 From: Mike Rapoport Date: Tue, 12 May 2009 16:31:16 +0300 Subject: [ARM] pxa/em-x270: add support for on-board USB Hub Signed-off-by: Mike Rapoport Signed-off-by: Eric Miao --- arch/arm/mach-pxa/em-x270.c | 69 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) (limited to 'arch/arm/mach-pxa/em-x270.c') 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) -- cgit v1.2.3-55-g7522