diff options
Diffstat (limited to 'arch/arm/cpu')
| -rw-r--r-- | arch/arm/cpu/armv7/tegra20/usb.c | 37 |
1 files changed, 21 insertions, 16 deletions
diff --git a/arch/arm/cpu/armv7/tegra20/usb.c b/arch/arm/cpu/armv7/tegra20/usb.c index 178bb13..cac0918 100644 --- a/arch/arm/cpu/armv7/tegra20/usb.c +++ b/arch/arm/cpu/armv7/tegra20/usb.c @@ -137,24 +137,29 @@ static const u8 utmip_elastic_limit = 16; /* UTMIP High Speed Sync Start Delay */ static const u8 utmip_hs_sync_start_delay = 9; -/* Put the port into host mode (this only works for OTG ports) */ +/* Put the port into host mode */ static void set_host_mode(struct fdt_usb *config) { - if (config->dr_mode == DR_MODE_OTG) { - /* Check whether remote host from USB1 is driving VBus */ - if (readl(&config->reg->phy_vbus_sensors) & VBUS_VLD_STS) - return; - - /* - * If not driving, we set the GPIO to enable VBUS. We assume - * that the pinmux is set up correctly for this. - */ - if (fdt_gpio_isvalid(&config->vbus_gpio)) { - fdtdec_setup_gpio(&config->vbus_gpio); - gpio_direction_output(config->vbus_gpio.gpio, 1); - debug("set_host_mode: GPIO %d high\n", - config->vbus_gpio.gpio); - } + /* + * If we are an OTG port, check if remote host is driving VBus and + * bail out in this case. + */ + if (config->dr_mode == DR_MODE_OTG && + (readl(&config->reg->phy_vbus_sensors) & VBUS_VLD_STS)) + return; + + /* + * If not driving, we set the GPIO to enable VBUS. We assume + * that the pinmux is set up correctly for this. + */ + if (fdt_gpio_isvalid(&config->vbus_gpio)) { + fdtdec_setup_gpio(&config->vbus_gpio); + gpio_direction_output(config->vbus_gpio.gpio, + (config->vbus_gpio.flags & FDT_GPIO_ACTIVE_LOW) ? + 0 : 1); + debug("set_host_mode: GPIO %d %s\n", config->vbus_gpio.gpio, + (config->vbus_gpio.flags & FDT_GPIO_ACTIVE_LOW) ? + "low" : "high"); } } |