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usb: cdns3: gadget: Implement udc_set_speed() callback

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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>
This commit is contained in:
Vignesh Raghavendra 2019-10-01 17:26:34 +05:30 committed by Marek Vasut
parent 7e91f6ccdc
commit 927c22b0da
1 changed files with 26 additions and 4 deletions
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30
drivers/usb/cdns3/gadget.c
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@ -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: