You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
241 lines
6.3 KiB
Diff
241 lines
6.3 KiB
Diff
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
|
|
|
|
diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
|
|
index 7d1451d..fc04d76 100644
|
|
--- 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
|
|
diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
|
|
index be58ada..52d59c1 100644
|
|
--- a/drivers/usb/phy/Makefile
|
|
+++ b/drivers/usb/phy/Makefile
|
|
@@ -33,3 +33,4 @@ obj-$(CONFIG_USB_RCAR_GEN2_PHY) += phy-rcar-gen2-usb.o
|
|
obj-$(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
|
|
diff --git a/drivers/usb/phy/ralink-phy.c b/drivers/usb/phy/ralink-phy.c
|
|
new file mode 100644
|
|
index 0000000..28046e5
|
|
--- /dev/null
|
|
+++ b/drivers/usb/phy/ralink-phy.c
|
|
@@ -0,0 +1,190 @@
|
|
+/*
|
|
+ * 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 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);
|
|
+ } 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_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>");
|
|
--
|
|
1.7.10.4
|
|
|