From: Marco Felsch <m.felsch@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH] usb: imx-us-phy: add vbus_valid ro parameter
Date: Tue, 24 Aug 2021 12:46:48 +0200 [thread overview]
Message-ID: <20210824104648.15938-1-m.felsch@pengutronix.de> (raw)
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>
---
drivers/usb/imx/imx-usb-phy.c | 34 +++++++++++++++++++++++++++++++++-
1 file changed, 33 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/imx/imx-usb-phy.c b/drivers/usb/imx/imx-usb-phy.c
index 32098ef248..9420c8c109 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;
@@ -132,6 +135,27 @@ static const struct phy_ops imx_phy_ops = {
.to_usbphy = imx_usbphy_to_usbphy,
};
+/* Albeit the access can only happen serial use two variables */
+unsigned int vbus_valid_usb1;
+unsigned int vbus_valid_usb2;
+
+static int imx_usbphy_get_vbus_state(struct param_d *p, void *priv)
+{
+ struct imx_usbphy *imxphy = priv;
+ unsigned int *vbus_valid;
+ unsigned int reg, val;
+
+ reg = imxphy->port_id ?
+ ANADIG_USB1_VBUS_DETECT_STAT :
+ ANADIG_USB2_VBUS_DETECT_STAT;
+ val = readl(imxphy->anatop + reg);
+
+ vbus_valid = imxphy->port_id ? &vbus_valid_usb1 : &vbus_valid_usb2;
+ *vbus_valid = !!(val & ANADIG_USB1_VBUS_DETECT_STAT_VBUS_VALID);
+
+ return 0;
+}
+
static int imx_usbphy_probe(struct device_d *dev)
{
struct resource *iores;
@@ -149,11 +173,19 @@ static int imx_usbphy_probe(struct device_d *dev)
imxphy->port_id = ret;
if (of_get_property(np, "fsl,anatop", NULL)) {
+ unsigned int *vbus_valid = imxphy->port_id ?
+ &vbus_valid_usb1 :
+ &vbus_valid_usb2;
+
imxphy->anatop =
syscon_base_lookup_by_phandle(np, "fsl,anatop");
ret = PTR_ERR_OR_ZERO(imxphy->anatop);
if (ret)
goto err_free;
+
+ dev_add_param_bool(dev, "vbus_valid", param_set_readonly,
+ imx_usbphy_get_vbus_state, vbus_valid,
+ imxphy);
}
iores = dev_request_mem_resource(dev, 0);
--
2.30.2
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next reply other threads:[~2021-08-24 10:48 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-24 10:46 Marco Felsch [this message]
2021-08-24 11:01 ` Ahmad Fatoum
2021-08-24 11:13 ` Marco Felsch
2021-08-24 11:21 ` Ahmad Fatoum
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