-From 900fa0abfea0cb7562c523769981dadc25f1f8cd Mon Sep 17 00:00:00 2001
-From: John Crispin <blogic@openwrt.org>
-Date: Sun, 27 Jul 2014 09:43:42 +0100
-Subject: [PATCH 37/57] USB: phy: add ralink SoC driver
-
-Signed-off-by: John Crispin <blogic@openwrt.org>
----
- drivers/usb/phy/Kconfig | 8 ++
- drivers/usb/phy/Makefile | 1 +
- drivers/usb/phy/ralink-phy.c | 190 ++++++++++++++++++++++++++++++++++++++++++
- 3 files changed, 199 insertions(+)
- create mode 100644 drivers/usb/phy/ralink-phy.c
-
---- a/drivers/usb/phy/Kconfig
-+++ b/drivers/usb/phy/Kconfig
-@@ -251,6 +251,14 @@ config USB_RCAR_GEN2_PHY
- To compile this driver as a module, choose M here: the
- module will be called phy-rcar-gen2-usb.
-
-+config RALINK_USBPHY
-+ bool "Ralink USB PHY controller Driver"
-+ depends on MIPS && RALINK
-+ select USB_PHY
-+ help
-+ Enable this to support ralink USB phy controller for ralink
-+ SoCs.
-+
- config USB_ULPI
- bool "Generic ULPI Transceiver Driver"
- depends on ARM
---- a/drivers/usb/phy/Makefile
-+++ b/drivers/usb/phy/Makefile
-@@ -33,3 +33,4 @@ obj-$(CONFIG_USB_RCAR_GEN2_PHY) += phy-
- obj-$(CONFIG_USB_ULPI) += phy-ulpi.o
- obj-$(CONFIG_USB_ULPI_VIEWPORT) += phy-ulpi-viewport.o
- obj-$(CONFIG_KEYSTONE_USB_PHY) += phy-keystone.o
-+obj-$(CONFIG_RALINK_USBPHY) += ralink-phy.o
---- /dev/null
-+++ b/drivers/usb/phy/ralink-phy.c
-@@ -0,0 +1,193 @@
-+/*
-+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
-+ *
-+ * based on: Renesas R-Car USB phy driver
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include <linux/delay.h>
-+#include <linux/io.h>
-+#include <linux/usb/otg.h>
-+#include <linux/of_platform.h>
-+#include <linux/platform_device.h>
-+#include <linux/spinlock.h>
-+#include <linux/module.h>
-+#include <linux/reset.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 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 usb_power_on(struct usb_phy *phy)
-+{
-+ if (atomic_inc_return(&usb_pwr_ref) == 1) {
-+ u32 t;
-+
-+ usb_phy_enable(1);
-+
-+// reset_control_assert(rstdev);
-+// reset_control_assert(rsthost);
-+
-+ if (OTG_STATE_B_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 void usb_power_off(struct usb_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);
-+ }
-+}
-+
-+static int usb_set_host(struct usb_otg *otg, struct usb_bus *host)
-+{
-+ otg->gadget = NULL;
-+ otg->host = host;
-+
-+ return 0;
-+}
-+
-+static int usb_set_peripheral(struct usb_otg *otg,
-+ struct usb_gadget *gadget)
-+{
-+ otg->host = NULL;
-+ otg->gadget = gadget;
-+
-+ return 0;
-+}
-+
-+static const struct of_device_id ralink_usbphy_dt_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_usbphy_dt_match);
-+
-+static int usb_phy_probe(struct platform_device *pdev)
-+{
-+ const struct of_device_id *match;
-+ struct device *dev = &pdev->dev;
-+ struct usb_otg *otg;
-+ struct usb_phy *phy;
-+ int ret;
-+
-+ match = of_match_device(ralink_usbphy_dt_match, &pdev->dev);
-+ phy_clk = (int) match->data;
-+
-+ rsthost = devm_reset_control_get(&pdev->dev, "host");
-+ rstdev = devm_reset_control_get(&pdev->dev, "device");
-+
-+ phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
-+ if (!phy) {
-+ dev_err(&pdev->dev, "unable to allocate memory for USB PHY\n");
-+ return -ENOMEM;
-+ }
-+
-+ otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
-+ if (!otg) {
-+ dev_err(&pdev->dev, "unable to allocate memory for USB OTG\n");
-+ return -ENOMEM;
-+ }
-+
-+ phy->dev = dev;
-+ phy->label = dev_name(dev);
-+ phy->init = usb_power_on;
-+ phy->shutdown = usb_power_off;
-+ otg->set_host = usb_set_host;
-+ otg->set_peripheral = usb_set_peripheral;
-+ otg->phy = phy;
-+ phy->otg = otg;
-+ ret = usb_add_phy(phy, USB_PHY_TYPE_USB2);
-+
-+ if (ret < 0) {
-+ dev_err(dev, "usb phy addition error\n");
-+ return ret;
-+ }
-+
-+ platform_set_drvdata(pdev, phy);
-+
-+ dev_info(&pdev->dev, "loaded\n");
-+
-+ return ret;
-+}
-+
-+static int usb_phy_remove(struct platform_device *pdev)
-+{
-+ struct usb_phy *phy = platform_get_drvdata(pdev);
-+
-+ usb_remove_phy(phy);
-+
-+ return 0;
-+}
-+
-+static struct platform_driver usb_phy_driver = {
-+ .driver = {
-+ .owner = THIS_MODULE,
-+ .name = "rt3xxx-usbphy",
-+ .of_match_table = of_match_ptr(ralink_usbphy_dt_match),
-+ },
-+ .probe = usb_phy_probe,
-+ .remove = usb_phy_remove,
-+};
-+
-+module_platform_driver(usb_phy_driver);
-+
-+MODULE_LICENSE("GPL v2");
-+MODULE_DESCRIPTION("Ralink USB phy");
-+MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
projects / openwrt / svn-archive / archive.git / blobdiff