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| author | David Brownell <dbrownell@users.sourceforge.net> | 2007-12-27 11:19:49 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-02-01 14:35:01 -0800 |
| commit | 4bde4a4c4ff53e67cde4b0fe630d6fc28106bff8 (patch) | |
| tree | 2974db90544830883700844cc3ef65c1d2108d81 /drivers/usb | |
| parent | 979e524a9c563376af096d2d8629b9969fc06659 (diff) | |
| download | kernel_samsung_crespo-4bde4a4c4ff53e67cde4b0fe630d6fc28106bff8.zip kernel_samsung_crespo-4bde4a4c4ff53e67cde4b0fe630d6fc28106bff8.tar.gz kernel_samsung_crespo-4bde4a4c4ff53e67cde4b0fe630d6fc28106bff8.tar.bz2 | |
USB: ohci-at91 uses generic GPIO calls
Update the ohci-at91 bus glue to start understanding about the per-port
power switch GPIOs it's given (on the sam9263-ek and potentially other
boards). For the moment this just claims them and forces them active
(assuming active-low power enables) whenever the HCD is loaded.
The assumption is still that board setup configures the GPIOs. Using
gpio_request() tracks actual usage and guards against conflict.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/ohci-at91.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c index d849c80..126fcbd 100644 --- a/drivers/usb/host/ohci-at91.c +++ b/drivers/usb/host/ohci-at91.c @@ -17,6 +17,8 @@ #include <asm/mach-types.h> #include <asm/hardware.h> +#include <asm/gpio.h> + #include <asm/arch/board.h> #include <asm/arch/cpu.h> @@ -271,12 +273,41 @@ static const struct hc_driver ohci_at91_hc_driver = { static int ohci_hcd_at91_drv_probe(struct platform_device *pdev) { + struct at91_usbh_data *pdata = pdev->dev.platform_data; + int i; + + if (pdata) { + /* REVISIT make the driver support per-port power switching, + * and also overcurrent detection. Here we assume the ports + * are always powered while this driver is active, and use + * active-low power switches. + */ + for (i = 0; i < pdata->ports; i++) { + if (pdata->vbus_pin[i] <= 0) + continue; + gpio_request(pdata->vbus_pin[i], "ohci_vbus"); + gpio_direction_output(pdata->vbus_pin[i], 0); + } + } + device_init_wakeup(&pdev->dev, 1); return usb_hcd_at91_probe(&ohci_at91_hc_driver, pdev); } static int ohci_hcd_at91_drv_remove(struct platform_device *pdev) { + struct at91_usbh_data *pdata = pdev->dev.platform_data; + int i; + + if (pdata) { + for (i = 0; i < pdata->ports; i++) { + if (pdata->vbus_pin[i] <= 0) + continue; + gpio_direction_output(pdata->vbus_pin[i], 1); + gpio_free(pdata->vbus_pin[i]); + } + } + device_init_wakeup(&pdev->dev, 0); return usb_hcd_at91_remove(platform_get_drvdata(pdev), pdev); } |