From: Dmitry Baryshkov <[EMAIL PROTECTED]>
Some boards (like e.g. Tosa) invert the VBUS-detection signal:
it's low when a host is supplying VBUS, and high otherwise.
Allow specifying whether gpio_vbus value is inverted.
Signed-off-by: Dmitry Baryshkov <[EMAIL PROTECTED]>
Signed-off-by: David Brownell <[EMAIL PROTECTED]>
Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
---
drivers/usb/gadget/pxa2xx_udc.c | 9 +++++++--
include/asm-arm/mach/udc_pxa2xx.h | 2 ++
2 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/gadget/pxa2xx_udc.c b/drivers/usb/gadget/pxa2xx_udc.c
index 4abf9d2..8bd9ce2 100644
--- a/drivers/usb/gadget/pxa2xx_udc.c
+++ b/drivers/usb/gadget/pxa2xx_udc.c
@@ -127,8 +127,10 @@ static int is_vbus_present(void)
{
struct pxa2xx_udc_mach_info *mach = the_controller->mach;
- if (mach->gpio_vbus)
- return gpio_get_value(mach->gpio_vbus);
+ if (mach->gpio_vbus) {
+ int value = gpio_get_value(mach->gpio_vbus);
+ return mach->gpio_vbus_inverted ? !value : value;
+ }
if (mach->udc_is_connected)
return mach->udc_is_connected();
return 1;
@@ -1398,6 +1400,9 @@ static irqreturn_t udc_vbus_irq(int irq, void *_dev)
struct pxa2xx_udc *dev = _dev;
int vbus = gpio_get_value(dev->mach->gpio_vbus);
+ if (dev->mach->gpio_vbus_inverted)
+ vbus = !vbus;
+
pxa2xx_udc_vbus_session(&dev->gadget, vbus);
return IRQ_HANDLED;
}
diff --git a/include/asm-arm/mach/udc_pxa2xx.h
b/include/asm-arm/mach/udc_pxa2xx.h
index ff0a957..f191e14 100644
--- a/include/asm-arm/mach/udc_pxa2xx.h
+++ b/include/asm-arm/mach/udc_pxa2xx.h
@@ -19,7 +19,9 @@ struct pxa2xx_udc_mach_info {
* with on-chip GPIOs not Lubbock's wierd hardware, can have a sane
* VBUS IRQ and omit the methods above. Store the GPIO number
* here; for GPIO 0, also mask in one of the pxa_gpio_mode() bits.
+ * Note that sometimes the signals go through inverters...
*/
+ bool gpio_vbus_inverted;
u16 gpio_vbus; /* high == vbus present */
u16 gpio_pullup; /* high == pullup activated */
};
--
1.5.3.8
-
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