diff options
Diffstat (limited to 'drivers/usb/dwc2')
| -rw-r--r-- | drivers/usb/dwc2/params.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c index ea6bd537e337..091bfcfef753 100644 --- a/drivers/usb/dwc2/params.c +++ b/drivers/usb/dwc2/params.c @@ -1029,11 +1029,33 @@ int dwc2_get_hwparams(struct dwc2_hsotg *hsotg) return 0; } +static int dwc2_limit_speed(struct dwc2_hsotg *hsotg) +{ + enum usb_device_speed usb_speed; + + usb_speed = usb_get_maximum_speed(hsotg->dev); + switch (usb_speed) { + case USB_SPEED_LOW: + dev_err(hsotg->dev, "Maximum speed cannot be forced to low-speed\n"); + return -EINVAL; + case USB_SPEED_FULL: + if (hsotg->params.speed == DWC2_SPEED_PARAM_LOW) + break; + hsotg->params.speed = DWC2_SPEED_PARAM_FULL; + break; + default: + break; + } + + return 0; +} + typedef void (*set_params_cb)(struct dwc2_hsotg *data); int dwc2_init_params(struct dwc2_hsotg *hsotg) { set_params_cb set_params; + int ret; dwc2_set_default_params(hsotg); dwc2_get_device_properties(hsotg); @@ -1051,6 +1073,10 @@ int dwc2_init_params(struct dwc2_hsotg *hsotg) } } + ret = dwc2_limit_speed(hsotg); + if (ret) + return ret; + dwc2_check_params(hsotg); return 0; |