You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
199 lines
5.4 KiB
199 lines
5.4 KiB
--- a/drivers/phy/Kconfig
|
|
+++ b/drivers/phy/Kconfig
|
|
@@ -239,6 +239,11 @@
|
|
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
|
|
+
|
|
config PHY_STIH407_USB
|
|
tristate "STMicroelectronics USB2 picoPHY driver for STiH407 family"
|
|
depends on RESET_CONTROLLER
|
|
--- a/drivers/phy/Makefile
|
|
+++ b/drivers/phy/Makefile
|
|
@@ -31,3 +31,4 @@
|
|
obj-$(CONFIG_PHY_XGENE) += phy-xgene.o
|
|
obj-$(CONFIG_PHY_STIH407_USB) += phy-stih407-usb.o
|
|
obj-$(CONFIG_PHY_STIH41X_USB) += phy-stih41x-usb.o
|
|
+obj-$(CONFIG_PHY_RALINK_USB) += phy-ralink-usb.o
|
|
--- /dev/null
|
|
+++ b/drivers/phy/phy-ralink-usb.c
|
|
@@ -0,0 +1,175 @@
|
|
+/*
|
|
+ * Allwinner ralink USB phy driver
|
|
+ *
|
|
+ * Copyright (C) 2014 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 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)
|
|
+
|
|
+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;
|
|
+
|
|
+static void usb_phy_enable(int state)
|
|
+{
|
|
+ if (state)
|
|
+ rt_sysc_m32(0, phy_clk, RT_SYSC_REG_CLKCFG1);
|
|
+ else
|
|
+ rt_sysc_m32(phy_clk, 0, RT_SYSC_REG_CLKCFG1);
|
|
+ mdelay(100);
|
|
+}
|
|
+
|
|
+static int ralink_usb_phy_init(struct phy *_phy)
|
|
+{
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int ralink_usb_phy_exit(struct phy *_phy)
|
|
+{
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int ralink_usb_phy_power_on(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");
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+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);
|
|
+ }
|
|
+
|
|
+ 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) },
|
|
+ { },
|
|
+};
|
|
+MODULE_DEVICE_TABLE(of, ralink_usb_phy_of_match);
|
|
+
|
|
+static int ralink_usb_phy_probe(struct platform_device *pdev)
|
|
+{
|
|
+ struct device *dev = &pdev->dev;
|
|
+ struct phy_provider *phy_provider;
|
|
+ const struct of_device_id *match;
|
|
+
|
|
+ match = of_match_device(ralink_usb_phy_of_match, &pdev->dev);
|
|
+ phy_clk = (int) match->data;
|
|
+
|
|
+ rsthost = devm_reset_control_get(&pdev->dev, "host");
|
|
+ rstdev = devm_reset_control_get(&pdev->dev, "device");
|
|
+
|
|
+ rt_phy = devm_phy_create(dev, NULL, &ralink_usb_phy_ops, NULL);
|
|
+ if (IS_ERR(rt_phy)) {
|
|
+ dev_err(dev, "failed to create PHY\n");
|
|
+ return PTR_ERR(rt_phy);
|
|
+ }
|
|
+
|
|
+ phy_provider = devm_of_phy_provider_register(dev, ralink_usb_phy_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");
|
|
|