diff options
Diffstat (limited to 'recipes/linux/linux-rp-2.6.24/tosa/0013-USB-gadget-pxa2xx_udc-supports-inverted-vbus.patch')
| -rw-r--r-- | recipes/linux/linux-rp-2.6.24/tosa/0013-USB-gadget-pxa2xx_udc-supports-inverted-vbus.patch | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/recipes/linux/linux-rp-2.6.24/tosa/0013-USB-gadget-pxa2xx_udc-supports-inverted-vbus.patch b/recipes/linux/linux-rp-2.6.24/tosa/0013-USB-gadget-pxa2xx_udc-supports-inverted-vbus.patch new file mode 100644 index 0000000000..082a2c72b8 --- /dev/null +++ b/recipes/linux/linux-rp-2.6.24/tosa/0013-USB-gadget-pxa2xx_udc-supports-inverted-vbus.patch @@ -0,0 +1,61 @@ +From 18c1a92a09faf75ebdac7ac471c741a6622cf3e2 Mon Sep 17 00:00:00 2001 +From: Dmitry Baryshkov <dbaryshkov@gmail.com> +Date: Wed, 9 Jan 2008 01:27:49 +0300 +Subject: [PATCH 13/64] USB: gadget: pxa2xx_udc supports inverted vbus + +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 <dbaryshkov@gmail.com> +Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> +Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> +--- + 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 3173b39..4f7d4ef 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; +@@ -1397,6 +1399,9 @@ 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 + |