+++ /dev/null
-From b00b5eafa7e8d059bd0ce844e66f648916953270 Mon Sep 17 00:00:00 2001
-From: John Crispin <blogic@openwrt.org>
-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>
----
- .../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 +331,14 @@
- help
- This option enables support for APM X-Gene SoC multi-purpose PHY.
-
-+config PHY_RALINK_USB
-+ 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-$(CONFIG_PHY_TUSB1210) += phy-tusb1210.o
- obj-$(CONFIG_PHY_BRCMSTB_SATA) += phy-brcmstb-sata.o
- obj-$(CONFIG_PHY_PISTACHIO_USB) += phy-pistachio-usb.o
-+obj-$(CONFIG_PHY_RALINK_USB) += phy-ralink-usb.o
---- /dev/null
-+++ b/drivers/phy/phy-ralink-usb.c
-@@ -0,0 +1,228 @@
-+/*
-+ * Allwinner ralink USB phy driver
-+ *
-+ * Copyright (C) 2016 John Crispin <blogic@openwrt.org>
-+ *
-+ * Based on code from
-+ * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ */
-+
-+#include <linux/delay.h>
-+#include <linux/err.h>
-+#include <linux/io.h>
-+#include <linux/kernel.h>
-+#include <linux/module.h>
-+#include <linux/mutex.h>
-+#include <linux/phy/phy.h>
-+#include <linux/platform_device.h>
-+#include <linux/reset.h>
-+#include <linux/of_platform.h>
-+
-+#include <asm/mach-ralink/ralink_regs.h>
-+
-+#define RT_SYSC_REG_SYSCFG1 0x014
-+#define RT_SYSC_REG_CLKCFG1 0x030
-+#define RT_SYSC_REG_USB_PHY_CFG 0x05c
-+
-+#define OFS_U2_PHY_AC0 0x00
-+#define OFS_U2_PHY_AC1 0x04
-+#define OFS_U2_PHY_AC2 0x08
-+#define OFS_U2_PHY_ACR0 0x10
-+#define OFS_U2_PHY_ACR1 0x14
-+#define OFS_U2_PHY_ACR2 0x18
-+#define OFS_U2_PHY_ACR3 0x1C
-+#define OFS_U2_PHY_ACR4 0x20
-+#define OFS_U2_PHY_AMON0 0x24
-+#define OFS_U2_PHY_DCR0 0x60
-+#define OFS_U2_PHY_DCR1 0x64
-+#define OFS_U2_PHY_DTM0 0x68
-+#define OFS_U2_PHY_DTM1 0x6C
-+
-+#define RT_RSTCTRL_UDEV BIT(25)
-+#define RT_RSTCTRL_UHST BIT(22)
-+#define RT_SYSCFG1_USB0_HOST_MODE BIT(10)
-+
-+#define MT7620_CLKCFG1_UPHY0_CLK_EN BIT(25)
-+#define MT7620_CLKCFG1_UPHY1_CLK_EN BIT(22)
-+#define RT_CLKCFG1_UPHY1_CLK_EN BIT(20)
-+#define RT_CLKCFG1_UPHY0_CLK_EN BIT(18)
-+
-+#define USB_PHY_UTMI_8B60M BIT(1)
-+#define UDEV_WAKEUP BIT(0)
-+
-+struct ralink_usb_phy {
-+ struct reset_control *rstdev;
-+ struct reset_control *rsthost;
-+ u32 clk;
-+ struct phy *phy;
-+ void __iomem *base;
-+};
-+
-+static void u2_phy_w32(struct ralink_usb_phy *phy, u32 val, u32 reg)
-+{
-+ iowrite32(val, phy->base + reg);
-+}
-+
-+static u32 u2_phy_r32(struct ralink_usb_phy *phy, u32 reg)
-+{
-+ return ioread32(phy->base + reg);
-+}
-+
-+static void
-+u2_phy_init(struct ralink_usb_phy *phy)
-+{
-+ u2_phy_r32(phy, OFS_U2_PHY_AC2);
-+ u2_phy_r32(phy, OFS_U2_PHY_ACR0);
-+ u2_phy_r32(phy, OFS_U2_PHY_DCR0);
-+
-+ u2_phy_w32(phy, 0x00ffff02, OFS_U2_PHY_DCR0);
-+ u2_phy_r32(phy, OFS_U2_PHY_DCR0);
-+ u2_phy_w32(phy, 0x00555502, OFS_U2_PHY_DCR0);
-+ u2_phy_r32(phy, OFS_U2_PHY_DCR0);
-+ u2_phy_w32(phy, 0x00aaaa02, OFS_U2_PHY_DCR0);
-+ u2_phy_r32(phy, OFS_U2_PHY_DCR0);
-+ u2_phy_w32(phy, 0x00000402, OFS_U2_PHY_DCR0);
-+ u2_phy_r32(phy, OFS_U2_PHY_DCR0);
-+ u2_phy_w32(phy, 0x0048086a, OFS_U2_PHY_AC0);
-+ u2_phy_w32(phy, 0x4400001c, OFS_U2_PHY_AC1);
-+ u2_phy_w32(phy, 0xc0200000, OFS_U2_PHY_ACR3);
-+ u2_phy_w32(phy, 0x02000000, OFS_U2_PHY_DTM0);
-+}
-+
-+static int ralink_usb_phy_power_on(struct phy *_phy)
-+{
-+ 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);
-+
-+ if (!IS_ERR(phy->base))
-+ u2_phy_init(phy);
-+
-+ /* 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
-+ dev_info(&phy->phy->dev, "UTMI 16bit 30MHz\n");
-+
-+ return 0;
-+}
-+
-+static int ralink_usb_phy_power_off(struct phy *_phy)
-+{
-+ struct ralink_usb_phy *phy = phy_get_drvdata(_phy);
-+
-+ /* assert the reset lines */
-+ reset_control_assert(phy->rstdev);
-+ reset_control_assert(phy->rsthost);
-+
-+ /* disable the phy */
-+ rt_sysc_m32(phy->clk, 0, RT_SYSC_REG_CLKCFG1);
-+
-+ return 0;
-+}
-+
-+static struct phy_ops ralink_usb_phy_ops = {
-+ .power_on = ralink_usb_phy_power_on,
-+ .power_off = ralink_usb_phy_power_off,
-+ .owner = THIS_MODULE,
-+};
-+
-+static const struct of_device_id ralink_usb_phy_of_match[] = {
-+ {
-+ .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);
-+
-+static int ralink_usb_phy_probe(struct platform_device *pdev)
-+{
-+ struct resource *res;
-+ 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);
-+ if (!match)
-+ return -ENODEV;
-+
-+ phy->clk = (int) match->data;
-+
-+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+ phy->base = devm_ioremap_resource(&pdev->dev, res);
-+
-+ 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);
-+ }
-+
-+ 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(phy->phy);
-+ }
-+ phy_set_drvdata(phy->phy, phy);
-+
-+ phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
-+
-+ return PTR_ERR_OR_ZERO(phy_provider);
-+}
-+
-+static struct platform_driver ralink_usb_phy_driver = {
-+ .probe = ralink_usb_phy_probe,
-+ .driver = {
-+ .of_match_table = ralink_usb_phy_of_match,
-+ .name = "ralink-usb-phy",
-+ }
-+};
-+module_platform_driver(ralink_usb_phy_driver);
-+
-+MODULE_DESCRIPTION("Ralink USB phy driver");
-+MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
-+MODULE_LICENSE("GPL v2");
projects / openwrt.git / blobdiff