Implement udc_set_speed() callback to limit Controller's speed to high-speed/full-speed when working with gadgets that are high-speed or full-speed only
Signed-off-by: Vignesh Raghavendra vigneshr@ti.com --- drivers/usb/cdns3/gadget.c | 30 ++++++++++++++++++++++++++---- 1 file changed, 26 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c index a4debb0ddf1d..0e02b779656c 100644 --- a/drivers/usb/cdns3/gadget.c +++ b/drivers/usb/cdns3/gadget.c @@ -2378,6 +2378,29 @@ static int cdns3_gadget_udc_stop(struct usb_gadget *gadget) return ret; }
+static void cdns3_gadget_udc_set_speed(struct usb_gadget *gadget, + enum usb_device_speed speed) +{ + struct cdns3_device *priv_dev = gadget_to_cdns3_device(gadget); + + switch (speed) { + case USB_SPEED_FULL: + writel(USB_CONF_SFORCE_FS, &priv_dev->regs->usb_conf); + writel(USB_CONF_USB3DIS, &priv_dev->regs->usb_conf); + break; + case USB_SPEED_HIGH: + writel(USB_CONF_USB3DIS, &priv_dev->regs->usb_conf); + break; + case USB_SPEED_SUPER: + break; + default: + dev_err(cdns->dev, "invalid speed parameter %d\n", + speed); + } + + priv_dev->gadget.speed = speed; +} + static const struct usb_gadget_ops cdns3_gadget_ops = { .get_frame = cdns3_gadget_get_frame, .wakeup = cdns3_gadget_wakeup, @@ -2386,6 +2409,7 @@ static const struct usb_gadget_ops cdns3_gadget_ops = { .udc_start = cdns3_gadget_udc_start, .udc_stop = cdns3_gadget_udc_stop, .match_ep = cdns3_gadget_match_ep, + .udc_set_speed = cdns3_gadget_udc_set_speed, };
static void cdns3_free_all_eps(struct cdns3_device *priv_dev) @@ -2557,11 +2581,9 @@ static int cdns3_gadget_start(struct cdns3 *cdns) /* Check the maximum_speed parameter */ switch (max_speed) { case USB_SPEED_FULL: - writel(USB_CONF_SFORCE_FS, &priv_dev->regs->usb_conf); - break; + /* fall through */ case USB_SPEED_HIGH: - writel(USB_CONF_USB3DIS, &priv_dev->regs->usb_conf); - break; + /* fall through */ case USB_SPEED_SUPER: break; default: