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usb: imx-us-phy: implement notify_(dis)concect 

The i.MX6 USB phy does not recognize disconnects of high speed
devices when the USBPHY_CTRL_ENHOSTDISCONDETECT is not set. The
phy does not work properly though when this bit is always set, so
implement the notify_(dis)concect() callbacks to set this bit
whenever a high speed device is connected and to clear it again
when the device is disconnected.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2016-09-29 14:30:44 +02:00
parent a44f222e09
commit e21ddc6ec0
1 changed files with 27 additions and 0 deletions
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27
drivers/usb/imx/imx-usb-phy.c
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@ -33,6 +33,7 @@
#define USBPHY_CTRL_CLKGATE (1 << 30)
#define USBPHY_CTRL_ENUTMILEVEL3 (1 << 15)
#define USBPHY_CTRL_ENUTMILEVEL2 (1 << 14)
#define USBPHY_CTRL_ENHOSTDISCONDETECT (1 << 1)
struct imx_usbphy {
struct usb_phy usb_phy;
@ -67,6 +68,30 @@ static int imx_usbphy_phy_init(struct phy *phy)
return 0;
}
static int imx_usbphy_notify_connect(struct usb_phy *phy,
enum usb_device_speed speed)
{
struct imx_usbphy *imxphy = container_of(phy, struct imx_usbphy, usb_phy);
if (speed == USB_SPEED_HIGH) {
writel(USBPHY_CTRL_ENHOSTDISCONDETECT,
imxphy->base + USBPHY_CTRL + SET);
}
return 0;
}
static int imx_usbphy_notify_disconnect(struct usb_phy *phy,
enum usb_device_speed speed)
{
struct imx_usbphy *imxphy = container_of(phy, struct imx_usbphy, usb_phy);
writel(USBPHY_CTRL_ENHOSTDISCONDETECT,
imxphy->base + USBPHY_CTRL + CLR);
return 0;
}
static struct phy *imx_usbphy_xlate(struct device_d *dev,
struct of_phandle_args *args)
{
@ -112,6 +137,8 @@ static int imx_usbphy_probe(struct device_d *dev)
dev->priv = imxphy;
imxphy->usb_phy.dev = dev;
imxphy->usb_phy.notify_connect = imx_usbphy_notify_connect;
imxphy->usb_phy.notify_disconnect = imx_usbphy_notify_disconnect;
imxphy->phy = phy_create(dev, NULL, &imx_phy_ops, NULL);
if (IS_ERR(imxphy->phy)) {
ret = PTR_ERR(imxphy->phy);