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Date: Tue, 22 Nov 2016 19:46:47 -0800
From: John Stultz <john.stultz@...aro.org>
To: lkml <linux-kernel@...r.kernel.org>
Cc: John Stultz <john.stultz@...aro.org>,
Wei Xu <xuwei5@...ilicon.com>,
Guodong Xu <guodong.xu@...aro.org>,
Amit Pundir <amit.pundir@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
John Youn <johnyoun@...opsys.com>,
Douglas Anderson <dianders@...omium.org>,
Chen Yu <chenyu56@...wei.com>,
Kishon Vijay Abraham I <kishon@...com>,
Felipe Balbi <felipe.balbi@...ux.intel.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-usb@...r.kernel.org
Subject: [RFC][PATCH 1/3] phy: phy-hi6220-usb: Wire up extconn support to hikey's phy driver
This wires extconn support to hikey's phy driver, and
connects it to the usb UDC layer via a usb_phy structure.
Not sure if this is the right way to connect phy -> UDC,
but I'm lacking a clear example.
Cc: Wei Xu <xuwei5@...ilicon.com>
Cc: Guodong Xu <guodong.xu@...aro.org>
Cc: Amit Pundir <amit.pundir@...aro.org>
Cc: Rob Herring <robh+dt@...nel.org>
Cc: John Youn <johnyoun@...opsys.com>
Cc: Douglas Anderson <dianders@...omium.org>
Cc: Chen Yu <chenyu56@...wei.com>
Cc: Kishon Vijay Abraham I <kishon@...com>
Cc: Felipe Balbi <felipe.balbi@...ux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-usb@...r.kernel.org
Signed-off-by: John Stultz <john.stultz@...aro.org>
---
arch/arm64/boot/dts/hisilicon/hi6220.dtsi | 11 +++
drivers/phy/Kconfig | 2 +
drivers/phy/phy-hi6220-usb.c | 139 ++++++++++++++++++++++++++++++
3 files changed, 152 insertions(+)
diff --git a/arch/arm64/boot/dts/hisilicon/hi6220.dtsi b/arch/arm64/boot/dts/hisilicon/hi6220.dtsi
index 17839db..171fbb2 100644
--- a/arch/arm64/boot/dts/hisilicon/hi6220.dtsi
+++ b/arch/arm64/boot/dts/hisilicon/hi6220.dtsi
@@ -732,10 +732,21 @@
regulator-always-on;
};
+ usb_vbus: usb-vbus {
+ compatible = "linux,extcon-usb-gpio";
+ id-gpio = <&gpio2 6 1>;
+ };
+
+ usb_id: usb-id {
+ compatible = "linux,extcon-usb-gpio";
+ id-gpio = <&gpio2 5 1>;
+ };
+
usb_phy: usbphy {
compatible = "hisilicon,hi6220-usb-phy";
#phy-cells = <0>;
phy-supply = <&fixed_5v_hub>;
+ extcon = <&usb_vbus>, <&usb_id>;
hisilicon,peripheral-syscon = <&sys_ctrl>;
};
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index fe00f91..76f4f17 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -254,8 +254,10 @@ config PHY_MT65XX_USB3
config PHY_HI6220_USB
tristate "hi6220 USB PHY support"
depends on (ARCH_HISI && ARM64) || COMPILE_TEST
+ depends on EXTCON
select GENERIC_PHY
select MFD_SYSCON
+ select USB_PHY
help
Enable this to support the HISILICON HI6220 USB PHY.
diff --git a/drivers/phy/phy-hi6220-usb.c b/drivers/phy/phy-hi6220-usb.c
index b2141cb..89d8475 100644
--- a/drivers/phy/phy-hi6220-usb.c
+++ b/drivers/phy/phy-hi6220-usb.c
@@ -12,7 +12,12 @@
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/phy/phy.h>
+#include <linux/usb/phy_companion.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/phy.h>
#include <linux/regmap.h>
+#include <linux/extcon.h>
#define SC_PERIPH_CTRL4 0x00c
@@ -44,9 +49,21 @@
#define EYE_PATTERN_PARA 0x7053348c
+
+struct hi6220_usb_cable {
+ struct notifier_block nb;
+ struct extcon_dev *extcon;
+ int state;
+};
+
struct hi6220_priv {
struct regmap *reg;
struct device *dev;
+ struct usb_phy phy;
+
+ struct delayed_work work;
+ struct hi6220_usb_cable vbus;
+ struct hi6220_usb_cable id;
};
static void hi6220_phy_init(struct hi6220_priv *priv)
@@ -112,23 +129,85 @@ static int hi6220_phy_exit(struct phy *phy)
return hi6220_phy_setup(priv, false);
}
+
static struct phy_ops hi6220_phy_ops = {
.init = hi6220_phy_start,
.exit = hi6220_phy_exit,
.owner = THIS_MODULE,
};
+static void hi6220_detect_work(struct work_struct *work)
+{
+ struct hi6220_priv *priv =
+ container_of(to_delayed_work(work), struct hi6220_priv, work);
+ struct usb_otg *otg = priv->phy.otg;
+
+ if (!IS_ERR(priv->vbus.extcon))
+ priv->vbus.state = extcon_get_cable_state_(priv->vbus.extcon,
+ EXTCON_USB);
+ if (!IS_ERR(priv->id.extcon))
+ priv->id.state = extcon_get_cable_state_(priv->id.extcon,
+ EXTCON_USB_HOST);
+ if (otg->gadget) {
+ if (priv->id.state)
+ usb_gadget_vbus_connect(otg->gadget);
+ else
+ usb_gadget_vbus_disconnect(otg->gadget);
+ }
+}
+
+static int hi6220_otg_vbus_notifier(struct notifier_block *nb,
+ unsigned long event, void *ptr)
+{
+ struct hi6220_usb_cable *vbus = container_of(nb,
+ struct hi6220_usb_cable, nb);
+ struct hi6220_priv *priv = container_of(vbus,
+ struct hi6220_priv, vbus);
+
+ schedule_delayed_work(&priv->work, msecs_to_jiffies(100));
+ return NOTIFY_DONE;
+}
+
+static int hi6220_otg_id_notifier(struct notifier_block *nb,
+ unsigned long event, void *ptr)
+{
+ struct hi6220_usb_cable *id = container_of(nb,
+ struct hi6220_usb_cable, nb);
+ struct hi6220_priv *priv = container_of(id, struct hi6220_priv, id);
+
+ schedule_delayed_work(&priv->work, msecs_to_jiffies(100));
+ return NOTIFY_DONE;
+}
+
+static int hi6220_otg_set_host(struct usb_otg *otg, struct usb_bus *host)
+{
+ otg->host = host;
+ return 0;
+}
+
+static int hi6220_otg_set_peripheral(struct usb_otg *otg,
+ struct usb_gadget *gadget)
+{
+ otg->gadget = gadget;
+ return 0;
+}
+
static int hi6220_phy_probe(struct platform_device *pdev)
{
struct phy_provider *phy_provider;
struct device *dev = &pdev->dev;
struct phy *phy;
+ struct usb_otg *otg;
struct hi6220_priv *priv;
+ struct extcon_dev *ext_id, *ext_vbus;
+ int ret;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
+ INIT_DELAYED_WORK(&priv->work, hi6220_detect_work);
+
priv->dev = dev;
priv->reg = syscon_regmap_lookup_by_phandle(dev->of_node,
"hisilicon,peripheral-syscon");
@@ -137,13 +216,73 @@ static int hi6220_phy_probe(struct platform_device *pdev)
return PTR_ERR(priv->reg);
}
+
+ ext_id = ERR_PTR(-ENODEV);
+ ext_vbus = ERR_PTR(-ENODEV);
+ if (of_property_read_bool(dev->of_node, "extcon")) {
+ /* Each one of them is not mandatory */
+ ext_vbus = extcon_get_edev_by_phandle(&pdev->dev, 0);
+ if (IS_ERR(ext_vbus) && PTR_ERR(ext_vbus) != -ENODEV)
+ return PTR_ERR(ext_vbus);
+
+ ext_id = extcon_get_edev_by_phandle(&pdev->dev, 1);
+ if (IS_ERR(ext_id) && PTR_ERR(ext_id) != -ENODEV)
+ return PTR_ERR(ext_id);
+ }
+
+ priv->vbus.extcon = ext_vbus;
+ if (!IS_ERR(ext_vbus)) {
+ priv->vbus.nb.notifier_call = hi6220_otg_vbus_notifier;
+ ret = extcon_register_notifier(ext_vbus, EXTCON_USB,
+ &priv->vbus.nb);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "register VBUS notifier failed\n");
+ return ret;
+ }
+
+ priv->vbus.state = extcon_get_cable_state_(ext_vbus,
+ EXTCON_USB);
+ }
+
+ priv->id.extcon = ext_id;
+ if (!IS_ERR(ext_id)) {
+ priv->id.nb.notifier_call = hi6220_otg_id_notifier;
+ ret = extcon_register_notifier(ext_id, EXTCON_USB_HOST,
+ &priv->id.nb);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "register ID notifier failed\n");
+ return ret;
+ }
+
+ priv->id.state = extcon_get_cable_state_(ext_id,
+ EXTCON_USB_HOST);
+ }
+
hi6220_phy_init(priv);
phy = devm_phy_create(dev, NULL, &hi6220_phy_ops);
if (IS_ERR(phy))
return PTR_ERR(phy);
+ otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
+ if (!otg)
+ return -ENOMEM;
+
+ priv->dev = &pdev->dev;
+ priv->phy.dev = priv->dev;
+ priv->phy.label = "hi6220_usb_phy";
+ priv->phy.otg = otg;
+ priv->phy.type = USB_PHY_TYPE_USB2;
+ otg->set_host = hi6220_otg_set_host;
+ otg->set_peripheral = hi6220_otg_set_peripheral;
+ otg->usb_phy = &priv->phy;
+
+ platform_set_drvdata(pdev, priv);
+
phy_set_drvdata(phy, priv);
+
+ usb_add_phy_dev(&priv->phy);
+
phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
return PTR_ERR_OR_ZERO(phy_provider);
}
--
2.7.4
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