diff options
| author | Marco Felsch <m.felsch@pengutronix.de> | 2021-08-24 14:12:08 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2021-10-04 13:57:13 +0200 |
| commit | 718edd880c63934d6feea79a98abea30c3f43a0a (patch) | |
| tree | 39a93525da0c823f4af69b3aff198521863f1640 /drivers/usb | |
| parent | 456d90992fe0b9f4258b693a946f8d13ba5b0b4c (diff) | |
| download | barebox-718edd880c63934d6feea79a98abea30c3f43a0a.tar.gz barebox-718edd880c63934d6feea79a98abea30c3f43a0a.tar.xz | |
usb: imx-us-phy: add vbus_valid ro parameter
The parameter can be used by init scripts to detect a plugged usb cable.
Upon a plugged usb cable the barebox behaviour can be changed which can
be useful e.g. during production to apply a special production
environment.
Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Link: https://lore.barebox.org/20210824121208.31988-1-m.felsch@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/imx/imx-usb-phy.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/drivers/usb/imx/imx-usb-phy.c b/drivers/usb/imx/imx-usb-phy.c index 32098ef248..6a58e71ba2 100644 --- a/drivers/usb/imx/imx-usb-phy.c +++ b/drivers/usb/imx/imx-usb-phy.c @@ -37,9 +37,12 @@ #define BM_USBPHY_CTRL_ENHOSTDISCONDETECT BIT(1) #define ANADIG_USB1_CHRG_DETECT_SET 0x1b4 -#define ANADIG_USB2_CHRG_DETECT_SET 0x214 #define ANADIG_USB1_CHRG_DETECT_EN_B BIT(20) #define ANADIG_USB1_CHRG_DETECT_CHK_CHRG_B BIT(19) +#define ANADIG_USB1_VBUS_DETECT_STAT 0x1c0 +#define ANADIG_USB1_VBUS_DETECT_STAT_VBUS_VALID BIT(3) +#define ANADIG_USB2_CHRG_DETECT_SET 0x214 +#define ANADIG_USB2_VBUS_DETECT_STAT 0x220 struct imx_usbphy { struct usb_phy usb_phy; @@ -49,6 +52,8 @@ struct imx_usbphy { struct clk *clk; struct phy_provider *provider; int port_id; + + unsigned int vbus_valid; }; static int imx_usbphy_phy_init(struct phy *phy) @@ -132,6 +137,21 @@ static const struct phy_ops imx_phy_ops = { .to_usbphy = imx_usbphy_to_usbphy, }; +static int imx_usbphy_get_vbus_state(struct param_d *p, void *priv) +{ + struct imx_usbphy *imxphy = priv; + unsigned int reg, val; + + reg = imxphy->port_id ? + ANADIG_USB1_VBUS_DETECT_STAT : + ANADIG_USB2_VBUS_DETECT_STAT; + val = readl(imxphy->anatop + reg); + + imxphy->vbus_valid = !!(val & ANADIG_USB1_VBUS_DETECT_STAT_VBUS_VALID); + + return 0; +} + static int imx_usbphy_probe(struct device_d *dev) { struct resource *iores; @@ -154,6 +174,15 @@ static int imx_usbphy_probe(struct device_d *dev) ret = PTR_ERR_OR_ZERO(imxphy->anatop); if (ret) goto err_free; + + /* + * This is useful in case of usb-otg = device. In host case + * it isn't that useful since we are the supplier of the vbus + * signal. + */ + dev_add_param_bool(dev, "vbus_valid", param_set_readonly, + imx_usbphy_get_vbus_state, + &imxphy->vbus_valid, imxphy); } iores = dev_request_mem_resource(dev, 0); |