ralink: update the usb phy driver to the version sent upstream

Signed-off-by: John Crispin <blogic@openwrt.org>

SVN-Revision: 48114

1 files changed, 112 insertions, 84 deletions

diff --git a/target/linux/ramips/patches-4.3/0029-phy-usb-add-ralink-phy.patch b/target/linux/ramips/patches-4.3/0029-phy-usb-add-ralink-phy.patch
index 8534da3439..f511b8838e 100644
--- a/target/linux/ramips/patches-4.3/0029-phy-usb-add-ralink-phy.patch
+++ b/target/linux/ramips/patches-4.3/0029-phy-usb-add-ralink-phy.patch
@@ -1,19 +1,44 @@
-From a10fc0cb650be725157eca50e2ceb34efc281ac2 Mon Sep 17 00:00:00 2001
+From b00b5eafa7e8d059bd0ce844e66f648916953270 Mon Sep 17 00:00:00 2001
 From: John Crispin <blogic@openwrt.org>
-Date: Mon, 22 Apr 2013 23:20:03 +0200
-Subject: [PATCH 29/53] phy: usb: add ralink phy
+Date: Sun, 3 Jan 2016 19:11:22 +0100
+Subject: [PATCH 2/3] phy: ralink-usb: add driver for Mediatek/Ralink
+
+Add a driver to setup the USB phy on Mediatek/Ralink SoCs.
+The driver is trivial and only sets up power and host mode.
 
 Signed-off-by: John Crispin <blogic@openwrt.org>
 ---
- drivers/phy/Kconfig          |    5 ++
- drivers/phy/Makefile         |    1 +
- drivers/phy/phy-ralink-usb.c |  175 ++++++++++++++++++++++++++++++++++++++++++
- 3 files changed, 181 insertions(+)
+ .../devicetree/bindings/phy/ralink-usb-phy.txt     |   17 ++
+ drivers/phy/Kconfig                                |    8 +
+ drivers/phy/Makefile                               |    1 +
+ drivers/phy/phy-ralink-usb.c                       |  171 ++++++++++++++++++++
+ 4 files changed, 197 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/phy/ralink-usb-phy.txt
  create mode 100644 drivers/phy/phy-ralink-usb.c
 
+--- /dev/null
++++ b/Documentation/devicetree/bindings/phy/ralink-usb-phy.txt
+@@ -0,0 +1,17 @@
++Mediatek/Ralink USB PHY
++
++Required properties:
++ - compatible: ralink,rt3352-usbphy or mediatek,mt7620-usbphy
++ - #phy-cells: should be 0
++ - resets: the two reset controllers for host and device
++ - reset-names: the names of the 2 reset controllers
++
++Example:
++
++usbphy: phy {
++	compatible = "mediatek,mt7620-usbphy";
++	#phy-cells = <0>;
++
++	resets = <&rstctrl 22 &rstctrl 25>;
++	reset-names = "host", "device";
++};
 --- a/drivers/phy/Kconfig
 +++ b/drivers/phy/Kconfig
-@@ -331,6 +331,11 @@ config PHY_XGENE
+@@ -331,6 +331,14 @@
  	help
  	  This option enables support for APM X-Gene SoC multi-purpose PHY.
  
@@ -21,13 +46,16 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +	tristate "Ralink USB PHY driver"
 +	select GENERIC_PHY
 +	depends on RALINK
++	help
++	  This option enables support for the Ralink USB PHY found inside
++	  RT3352 and MT7620.
 +
  config PHY_STIH407_USB
  	tristate "STMicroelectronics USB2 picoPHY driver for STiH407 family"
  	depends on RESET_CONTROLLER
 --- a/drivers/phy/Makefile
 +++ b/drivers/phy/Makefile
-@@ -46,3 +46,4 @@ obj-$(CONFIG_PHY_QCOM_UFS) 	+= phy-qcom-
+@@ -46,3 +46,4 @@
  obj-$(CONFIG_PHY_TUSB1210)		+= phy-tusb1210.o
  obj-$(CONFIG_PHY_BRCMSTB_SATA)		+= phy-brcmstb-sata.o
  obj-$(CONFIG_PHY_PISTACHIO_USB)		+= phy-pistachio-usb.o
@@ -38,7 +66,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +/*
 + * Allwinner ralink USB phy driver
 + *
-+ * Copyright (C) 2014 John Crispin <blogic@openwrt.org>
++ * Copyright (C) 2016 John Crispin <blogic@openwrt.org>
 + *
 + * Based on code from
 + * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
@@ -83,94 +111,76 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +#define USB_PHY_UTMI_8B60M		BIT(1)
 +#define UDEV_WAKEUP			BIT(0)
 +
-+static atomic_t usb_pwr_ref = ATOMIC_INIT(0);
-+static struct reset_control *rstdev;
-+static struct reset_control *rsthost;
-+static u32 phy_clk;
-+static struct phy *rt_phy;
++struct ralink_usb_phy {
++	struct reset_control	*rstdev;
++	struct reset_control	*rsthost;
++	u32			clk;
++	struct phy		*phy;
++};
 +
-+static void usb_phy_enable(int state)
++static int ralink_usb_phy_power_on(struct phy *_phy)
 +{
-+	if (state)
-+		rt_sysc_m32(0, phy_clk, RT_SYSC_REG_CLKCFG1);
++	struct ralink_usb_phy *phy = phy_get_drvdata(_phy);
++	u32 t;
++
++	/* enable the phy */
++	rt_sysc_m32(0, phy->clk, RT_SYSC_REG_CLKCFG1);
++
++	/* setup host mode */
++	rt_sysc_m32(0, RT_SYSCFG1_USB0_HOST_MODE, RT_SYSC_REG_SYSCFG1);
++
++	/* deassert the reset lines */
++	reset_control_deassert(phy->rsthost);
++	reset_control_deassert(phy->rstdev);
++
++	/*
++	 * The SDK kernel had a delay of 100ms. however on device
++	 * testing showed that 10ms is enough
++	 */
++	mdelay(10);
++
++	/* print some status info */
++	t = rt_sysc_r32(RT_SYSC_REG_USB_PHY_CFG);
++	dev_info(&phy->phy->dev, "remote usb device wakeup %s\n",
++		(t & UDEV_WAKEUP) ? ("enabled") : ("disabled"));
++	if (t & USB_PHY_UTMI_8B60M)
++		dev_info(&phy->phy->dev, "UTMI 8bit 60MHz\n");
 +	else
-+		rt_sysc_m32(phy_clk, 0, RT_SYSC_REG_CLKCFG1);
-+	mdelay(100);
-+}
-+
-+static int ralink_usb_phy_init(struct phy *_phy)
-+{
-+	return 0;
-+}
++		dev_info(&phy->phy->dev, "UTMI 16bit 30MHz\n");
 +
-+static int ralink_usb_phy_exit(struct phy *_phy)
-+{
 +	return 0;
 +}
 +
-+static int ralink_usb_phy_power_on(struct phy *_phy)
++static int ralink_usb_phy_power_off(struct phy *_phy)
 +{
-+	if (atomic_inc_return(&usb_pwr_ref) == 1) {
-+		int host = 1;
-+		u32 t;
-+
-+		usb_phy_enable(1);
-+
-+		if (host) {
-+			rt_sysc_m32(0, RT_SYSCFG1_USB0_HOST_MODE, RT_SYSC_REG_SYSCFG1);
-+			if (!IS_ERR(rsthost))
-+				reset_control_deassert(rsthost);
-+			if (!IS_ERR(rstdev))
-+				reset_control_deassert(rstdev);
-+		} else {
-+			rt_sysc_m32(RT_SYSCFG1_USB0_HOST_MODE, 0, RT_SYSC_REG_SYSCFG1);
-+			if (!IS_ERR(rstdev))
-+				reset_control_deassert(rstdev);
-+		}
-+		mdelay(100);
-+
-+		t = rt_sysc_r32(RT_SYSC_REG_USB_PHY_CFG);
-+		dev_info(&_phy->dev, "remote usb device wakeup %s\n",
-+			(t & UDEV_WAKEUP) ? ("enabbled") : ("disabled"));
-+		if (t & USB_PHY_UTMI_8B60M)
-+			dev_info(&_phy->dev, "UTMI 8bit 60MHz\n");
-+		else
-+			dev_info(&_phy->dev, "UTMI 16bit 30MHz\n");
-+	}
++	struct ralink_usb_phy *phy = phy_get_drvdata(_phy);
 +
-+	return 0;
-+}
++	/* disable the phy */
++	rt_sysc_m32(phy->clk, 0, RT_SYSC_REG_CLKCFG1);
 +
-+static int ralink_usb_phy_power_off(struct phy *_phy)
-+{
-+	if (atomic_dec_return(&usb_pwr_ref) == 0) {
-+		usb_phy_enable(0);
-+		if (!IS_ERR(rstdev))
-+			reset_control_assert(rstdev);
-+		if (!IS_ERR(rsthost))
-+			reset_control_assert(rsthost);
-+	}
++	/* assert the reset lines */
++	reset_control_assert(phy->rstdev);
++	reset_control_assert(phy->rsthost);
 +
 +	return 0;
 +}
 +
 +static struct phy_ops ralink_usb_phy_ops = {
-+	.init		= ralink_usb_phy_init,
-+	.exit		= ralink_usb_phy_exit,
 +	.power_on	= ralink_usb_phy_power_on,
 +	.power_off	= ralink_usb_phy_power_off,
 +	.owner		= THIS_MODULE,
 +};
 +
-+static struct phy *ralink_usb_phy_xlate(struct device *dev,
-+					struct of_phandle_args *args)
-+{
-+	return rt_phy;
-+}
-+
 +static const struct of_device_id ralink_usb_phy_of_match[] = {
-+	{ .compatible = "ralink,rt3xxx-usbphy", .data = (void *) (RT_CLKCFG1_UPHY1_CLK_EN | RT_CLKCFG1_UPHY0_CLK_EN) },
-+	{ .compatible = "ralink,mt7620a-usbphy", .data = (void *) (MT7620_CLKCFG1_UPHY1_CLK_EN | MT7620_CLKCFG1_UPHY0_CLK_EN) },
++	{
++		.compatible = "ralink,rt3352-usbphy",
++		.data = (void *) (RT_CLKCFG1_UPHY1_CLK_EN |
++				  RT_CLKCFG1_UPHY0_CLK_EN)
++	},
++	{
++		.compatible = "mediatek,mt7620-usbphy",
++		.data = (void *) (MT7620_CLKCFG1_UPHY1_CLK_EN |
++				  MT7620_CLKCFG1_UPHY0_CLK_EN) },
 +	{ },
 +};
 +MODULE_DEVICE_TABLE(of, ralink_usb_phy_of_match);
@@ -180,20 +190,38 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +	struct device *dev = &pdev->dev;
 +	struct phy_provider *phy_provider;
 +	const struct of_device_id *match;
++	struct ralink_usb_phy *phy;
++
++	phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
++	if (!phy)
++		return -ENOMEM;
 +
 +	match = of_match_device(ralink_usb_phy_of_match, &pdev->dev);
-+	phy_clk = (int) match->data;
++	if (!match)
++		return -ENODEV;
++
++	phy->clk = (int) match->data;
 +
-+	rsthost = devm_reset_control_get(&pdev->dev, "host");
-+	rstdev = devm_reset_control_get(&pdev->dev, "device");
++	phy->rsthost = devm_reset_control_get(&pdev->dev, "host");
++	if (IS_ERR(phy->rsthost)) {
++		dev_err(dev, "host reset is missing\n");
++		return PTR_ERR(phy->rsthost);
++	}
++
++	phy->rstdev = devm_reset_control_get(&pdev->dev, "device");
++	if (IS_ERR(phy->rstdev)) {
++		dev_err(dev, "device reset is missing\n");
++		return PTR_ERR(phy->rstdev);
++	}
 +
-+	rt_phy = devm_phy_create(dev, NULL, &ralink_usb_phy_ops);
-+	if (IS_ERR(rt_phy)) {
++	phy->phy = devm_phy_create(dev, NULL, &ralink_usb_phy_ops);
++	if (IS_ERR(phy->phy)) {
 +		dev_err(dev, "failed to create PHY\n");
-+		return PTR_ERR(rt_phy);
++		return PTR_ERR(phy->phy);
 +	}
++	phy_set_drvdata(phy->phy, phy);
 +
-+	phy_provider = devm_of_phy_provider_register(dev, ralink_usb_phy_xlate);
++	phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
 +
 +	return PTR_ERR_OR_ZERO(phy_provider);
 +}