[RFC] [PATCH] phy: Add new Exynos USB PHY driver
From: Kamil Debski
Date: Wed Sep 11 2013 - 07:28:03 EST
Add a new driver for the Exynos USB PHY. The new driver uses the generic
PHY framework.
Signed-off-by: Kamil Debski <k.debski@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
Cc: Kishon Vijay Abraham I <kishon@xxxxxx>
Cc: Tomasz Figa <t.figa@xxxxxxxxxxx>
Cc: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
Cc: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
---
Hi,
This patch adds a new drive for USB PHYs for Samsung SoCs. The driver is using
the Generic PHY Framework created by Kishon Vijay Abrahan I. It can be found
here https://lkml.org/lkml/2013/8/21/29.
This patch adds support to Exynos4 family of SoCs. Support for Exynos3 and
Exynos5 is planned to be added in the near future.
I welcome your comments.
Best wishes,
Kamil Debski
---
.../devicetree/bindings/phy/samsung-usbphy.txt | 48 +++
drivers/phy/Kconfig | 23 ++
drivers/phy/Makefile | 3 +
drivers/phy/phy-exynos-usb.c | 245 ++++++++++++++
drivers/phy/phy-exynos-usb.h | 95 ++++++
drivers/phy/phy-exynos4210-usb.c | 315 ++++++++++++++++++
drivers/phy/phy-exynos4212-usb.c | 349 ++++++++++++++++++++
7 files changed, 1078 insertions(+)
create mode 100644 Documentation/devicetree/bindings/phy/samsung-usbphy.txt
create mode 100644 drivers/phy/phy-exynos-usb.c
create mode 100644 drivers/phy/phy-exynos-usb.h
create mode 100644 drivers/phy/phy-exynos4210-usb.c
create mode 100644 drivers/phy/phy-exynos4212-usb.c
diff --git a/Documentation/devicetree/bindings/phy/samsung-usbphy.txt b/Documentation/devicetree/bindings/phy/samsung-usbphy.txt
new file mode 100644
index 0000000..f618e8d
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/samsung-usbphy.txt
@@ -0,0 +1,48 @@
+Samsung S5P/EXYNOS SoC series USB PHY
+-------------------------------------------------
+
+Required properties:
+- compatible : should be one of the listed compatibles:
+ - "samsung,exynos4210-usbphy"
+ - "samsung,exynos4212-usbphy"
+- reg : a list of registers used by phy driver
+ - first and obligatory is the location of phy modules registers
+ - second and also required is the location of isolation registers
+ (isolation registers control the physical connection between the in
+ SoC modules and outside of the SoC, this also can be called enable
+ control in the documentation of the SoC)
+ - third is the location of the mode switch register, this only applies
+ to SoCs that have such a feature; mode switching enables to have
+ both host and device used the same SoC pins and is commonly used
+ when OTG is supported
+- #phy-cells : from the generic phy bindings, must be 1;
+
+The second cell in the PHY specifier identifies the PHY its meaning is SoC
+dependent. For the currently supported SoCs (Exynos 4210 and Exynos 4212) it
+is as follows:
+ 0 - USB device,
+ 1 - USB host,
+ 2 - HSIC0,
+ 3 - HSIC1,
+
+Example:
+
+For Exynos 4412 (compatible with Exynos 4212):
+
+exynos_usbphy: exynos-usbphy@125B0000 {
+ compatible = "samsung,exynos4212-usbphy";
+ reg = <0x125B0000 0x100>, <0x10020704 0x0c>, <0x1001021c 0x4>;
+ clocks = <&clock 305>, <&clock 2>, <&clock 2>, <&clock 2>,
+ <&clock 2>;
+ clock-names = "phy", "device", "host", "hsic0", "hsic1";
+ status = "okay";
+ #phy-cells = <1>;
+};
+
+Then the PHY can be used in other nodes such as:
+
+ehci@12580000 {
+ status = "okay";
+ phys = <&exynos_usbphy 2>;
+ phy-names = "hsic0";
+};
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index 108c5f6..af3c422 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -21,4 +21,27 @@ config PHY_EXYNOS_MIPI_VIDEO
Support for MIPI CSI-2 and MIPI DSI DPHY found on Samsung
S5P and EXYNOS SoCs.
+config PHY_EXYNOS_USB
+ tristate "Samsung USB PHY driver (using the Generic PHY Framework)"
+ help
+ Samsung USB PHY driver
+
+ Enable this to support Samsung USB phy helper driver for Samsung SoCs.
+ This driver provides common interface to interact, for Samsung
+ USB 2.0 PHY driver.
+
+config PHY_EXYNOS4210_USB
+ bool "Support for Exynos 4210"
+ depends on PHY_EXYNOS_USB
+ depends on CPU_EXYNOS4210
+ help
+ Enable USB PHY support for Exynos 4210
+
+config PHY_EXYNOS4212_USB
+ bool "Support for Exynos 4212"
+ depends on PHY_EXYNOS_USB
+ depends on (SOC_EXYNOS4212 || SOC_EXYNOS4412)
+ help
+ Enable USB PHY support for Exynos 4212
+
endmenu
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 71d8841..d75f932 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -4,3 +4,6 @@
obj-$(CONFIG_GENERIC_PHY) += phy-core.o
obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o
+obj-$(CONFIG_PHY_EXYNOS_USB) += phy-exynos-usb.o
+obj-$(CONFIG_PHY_EXYNOS4210_USB) += phy-exynos4210-usb.o
+obj-$(CONFIG_PHY_EXYNOS4212_USB) += phy-exynos4212-usb.o
diff --git a/drivers/phy/phy-exynos-usb.c b/drivers/phy/phy-exynos-usb.c
new file mode 100644
index 0000000..b15a19f
--- /dev/null
+++ b/drivers/phy/phy-exynos-usb.c
@@ -0,0 +1,245 @@
+/*
+ * Samsung S5P/EXYNOS SoC series USB PHY driver
+ *
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * Author: Kamil Debski <k.debski@xxxxxxxxxxx>
+ *
+ * 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/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include "phy-exynos-usb.h"
+
+static int exynos_uphy_power_on(struct phy *phy)
+{
+ struct uphy_instance *inst = phy_get_drvdata(phy);
+ struct uphy_driver *drv = inst->drv;
+ int ret;
+
+ dev_info(drv->dev, "Request to power_on \"%s\" usb phy\n",
+ inst->cfg->label);
+ ret = clk_prepare_enable(drv->clk);
+ if (ret)
+ return ret;
+ if (inst->cfg->power_on) {
+ spin_lock(&drv->lock);
+ ret = inst->cfg->power_on(inst);
+ spin_unlock(&drv->lock);
+ }
+ clk_disable_unprepare(drv->clk);
+ return ret;
+}
+
+static int exynos_uphy_power_off(struct phy *phy)
+{
+ struct uphy_instance *inst = phy_get_drvdata(phy);
+ struct uphy_driver *drv = inst->drv;
+ int ret;
+
+ dev_info(drv->dev, "Request to power_off \"%s\" usb phy\n",
+ inst->cfg->label);
+ ret = clk_prepare_enable(drv->clk);
+ if (ret)
+ return ret;
+ if (inst->cfg->power_off) {
+ spin_lock(&drv->lock);
+ ret = inst->cfg->power_off(inst);
+ spin_unlock(&drv->lock);
+ }
+ clk_disable_unprepare(drv->clk);
+ return ret;
+}
+
+static struct phy_ops exynos_uphy_ops = {
+ .power_on = exynos_uphy_power_on,
+ .power_off = exynos_uphy_power_off,
+ .owner = THIS_MODULE,
+};
+
+static struct phy *exynos_uphy_xlate(struct device *dev,
+ struct of_phandle_args *args)
+{
+ struct uphy_driver *drv;
+
+ drv = dev_get_drvdata(dev);
+ if (!drv)
+ return ERR_PTR(-EINVAL);
+
+ if (WARN_ON(args->args[0] >= drv->cfg->num_phys))
+ return ERR_PTR(-ENODEV);
+
+ return drv->uphy_instances[args->args[0]].phy;
+}
+
+static const struct of_device_id exynos_uphy_of_match[];
+
+static int exynos_uphy_probe(struct platform_device *pdev)
+{
+ struct uphy_driver *drv;
+ struct device *dev = &pdev->dev;
+ struct resource *mem;
+ struct phy_provider *phy_provider;
+
+ const struct of_device_id *match;
+ const struct uphy_config *cfg;
+ struct clk *clk;
+
+ int i;
+
+ match = of_match_node(exynos_uphy_of_match, pdev->dev.of_node);
+ if (!match) {
+ dev_err(dev, "of_match_node() failed\n");
+ return -EINVAL;
+ }
+ cfg = match->data;
+ if (!cfg) {
+ dev_err(dev, "Failed to get configuration\n");
+ return -EINVAL;
+ }
+
+ drv = devm_kzalloc(dev, sizeof(struct uphy_driver) +
+ cfg->num_phys * sizeof(struct uphy_instance), GFP_KERNEL);
+
+ if (!drv) {
+ dev_err(dev, "Failed to allocate memory\n");
+ return -ENOMEM;
+ }
+
+ dev_set_drvdata(dev, drv);
+ spin_lock_init(&drv->lock);
+
+ drv->cfg = cfg;
+ drv->dev = dev;
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ drv->reg_phy = devm_ioremap_resource(dev, mem);
+ if (IS_ERR(drv->reg_phy)) {
+ dev_err(dev, "Failed to map register memory (phy)\n");
+ return PTR_ERR(drv->reg_phy);
+ }
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ drv->reg_isol = devm_ioremap_resource(dev, mem);
+ if (IS_ERR(drv->reg_isol)) {
+ dev_err(dev, "Failed to map register memory (isolation)\n");
+ return PTR_ERR(drv->reg_isol);
+ }
+
+ switch (drv->cfg->cpu) {
+ case TYPE_EXYNOS4210:
+ case TYPE_EXYNOS4212:
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 2);
+ drv->reg_mode = devm_ioremap_resource(dev, mem);
+ if (IS_ERR(drv->reg_mode)) {
+ dev_err(dev, "Failed to map register memory (mode switch)\n");
+ return PTR_ERR(drv->reg_mode);
+ }
+ break;
+ default:
+ break;
+ }
+
+ phy_provider = devm_of_phy_provider_register(dev,
+ exynos_uphy_xlate);
+ if (IS_ERR(phy_provider)) {
+ dev_err(drv->dev, "Failed to register phy provider\n");
+ return PTR_ERR(phy_provider);
+ }
+
+ drv->clk = devm_clk_get(dev, "phy");
+ if (IS_ERR(drv->clk)) {
+ dev_err(dev, "Failed to get clock of phy controller\n");
+ return PTR_ERR(drv->clk);
+ }
+
+ for (i = 0; i < drv->cfg->num_phys; i++) {
+ char *label = drv->cfg->phys[i].label;
+ struct uphy_instance *p = &drv->uphy_instances[i];
+
+ dev_info(dev, "Creating phy \"%s\"\n", label);
+ p->phy = devm_phy_create(dev, &exynos_uphy_ops, NULL);
+ if (IS_ERR(p->phy)) {
+ dev_err(drv->dev, "Failed to create uphy \"%s\"\n",
+ label);
+ return PTR_ERR(p->phy);
+ }
+
+ p->cfg = &drv->cfg->phys[i];
+ p->drv = drv;
+ phy_set_drvdata(p->phy, p);
+
+ clk = clk_get(dev, p->cfg->label);
+ if (IS_ERR(clk)) {
+ dev_err(dev, "Failed to get clock of \"%s\" phy\n",
+ p->cfg->label);
+ return PTR_ERR(drv->clk);
+ }
+
+ p->rate = clk_get_rate(clk);
+
+ if (p->cfg->rate_to_clk) {
+ p->clk = p->cfg->rate_to_clk(p->rate);
+ if (p->clk == CLKSEL_ERROR) {
+ dev_err(dev, "Clock rate (%ld) not supported\n",
+ p->rate);
+ clk_put(clk);
+ return -EINVAL;
+ }
+ }
+ clk_put(clk);
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_PHY_EXYNOS4210_USB
+extern const struct uphy_config exynos4210_uphy_config;
+#endif
+
+#ifdef CONFIG_PHY_EXYNOS4212_USB
+extern const struct uphy_config exynos4212_uphy_config;
+#endif
+
+static const struct of_device_id exynos_uphy_of_match[] = {
+#ifdef CONFIG_PHY_EXYNOS4210_USB
+ {
+ .compatible = "samsung,exynos4210-usbphy",
+ .data = &exynos4210_uphy_config,
+ },
+#endif
+#ifdef CONFIG_PHY_EXYNOS4212_USB
+ {
+ .compatible = "samsung,exynos4212-usbphy",
+ .data = &exynos4212_uphy_config,
+ },
+#endif
+ { },
+};
+
+static struct platform_driver exynos_uphy_driver = {
+ .probe = exynos_uphy_probe,
+ .driver = {
+ .of_match_table = exynos_uphy_of_match,
+ .name = "exynos-usbphy-new",
+ .owner = THIS_MODULE,
+ }
+};
+
+module_platform_driver(exynos_uphy_driver);
+MODULE_DESCRIPTION("Samsung S5P/EXYNOS SoC USB PHY driver");
+MODULE_AUTHOR("Kamil Debski <k.debski@xxxxxxxxxxx>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:exynos-uphy-new");
+
diff --git a/drivers/phy/phy-exynos-usb.h b/drivers/phy/phy-exynos-usb.h
new file mode 100644
index 0000000..597a02e
--- /dev/null
+++ b/drivers/phy/phy-exynos-usb.h
@@ -0,0 +1,95 @@
+/*
+ * Samsung S5P/EXYNOS SoC series USB PHY driver
+ *
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * Author: Kamil Debski <k.debski@xxxxxxxxxxx>
+ *
+ * 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.
+ */
+
+#ifndef _PHY_SAMSUNG_NEW_H
+#define _PHY_SAMSUNG_NEW_H
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+
+#define CLKSEL_ERROR -1
+
+#ifndef KHZ
+#define KHZ 1000
+#endif
+
+#ifndef MHZ
+#define MHZ (KHZ * KHZ)
+#endif
+
+enum phy_type {
+ PHY_DEVICE,
+ PHY_HOST,
+};
+
+enum samsung_cpu_type {
+ TYPE_S3C64XX,
+ TYPE_EXYNOS4210,
+ TYPE_EXYNOS4212,
+ TYPE_EXYNOS5250,
+};
+
+enum uphy_state {
+ STATE_OFF,
+ STATE_ON,
+};
+
+struct uphy_driver;
+struct uphy_instance;
+struct uphy_config;
+
+struct uphy_instance {
+ struct uphy_driver *drv;
+ struct phy *phy;
+ const struct common_phy *cfg;
+ enum uphy_state state;
+ int ref_cnt;
+ u32 clk;
+ unsigned long rate;
+};
+
+struct uphy_driver {
+ struct device *dev;
+ spinlock_t lock;
+ void __iomem *reg_phy;
+ void __iomem *reg_isol;
+ void __iomem *reg_mode;
+ const struct uphy_config *cfg;
+ struct clk *clk;
+ struct uphy_instance uphy_instances[0];
+};
+
+struct common_phy {
+ char *label;
+ enum phy_type type;
+ unsigned int id;
+ u32 (*rate_to_clk)(unsigned long);
+ int (*power_on)(struct uphy_instance *);
+ int (*power_off)(struct uphy_instance *);
+};
+
+
+struct uphy_config {
+ enum samsung_cpu_type cpu;
+ int num_phys;
+ const struct common_phy *phys;
+};
+
+#endif
+
diff --git a/drivers/phy/phy-exynos4210-usb.c b/drivers/phy/phy-exynos4210-usb.c
new file mode 100644
index 0000000..4b849e7
--- /dev/null
+++ b/drivers/phy/phy-exynos4210-usb.c
@@ -0,0 +1,315 @@
+/*
+ * Samsung S5P/EXYNOS SoC series USB PHY driver
+ *
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * Author: Kamil Debski <k.debski@xxxxxxxxxxx>
+ *
+ * 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/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include "phy-exynos-usb.h"
+
+/* Exynos USB PHY registers */
+
+/* PHY power control */
+#define EXYNOS_4210_UPHYPWR 0x0
+
+#define EXYNOS_4210_UPHYPWR_PHY0_SUSPEND (1 << 0)
+#define EXYNOS_4210_UPHYPWR_PHY0_PWR (1 << 3)
+#define EXYNOS_4210_UPHYPWR_PHY0_OTG_PWR (1 << 4)
+#define EXYNOS_4210_UPHYPWR_PHY0_SLEEP (1 << 5)
+#define EXYNOS_4210_UPHYPWR_PHY0 ( \
+ EXYNOS_4210_UPHYPWR_PHY0_SUSPEND | \
+ EXYNOS_4210_UPHYPWR_PHY0_PWR | \
+ EXYNOS_4210_UPHYPWR_PHY0_OTG_PWR | \
+ EXYNOS_4210_UPHYPWR_PHY0_SLEEP)
+
+#define EXYNOS_4210_UPHYPWR_PHY1_SUSPEND (1 << 6)
+#define EXYNOS_4210_UPHYPWR_PHY1_PWR (1 << 7)
+#define EXYNOS_4210_UPHYPWR_PHY1_SLEEP (1 << 8)
+#define EXYNOS_4210_UPHYPWR_PHY1 ( \
+ EXYNOS_4210_UPHYPWR_PHY1_SUSPEND | \
+ EXYNOS_4210_UPHYPWR_PHY1_PWR | \
+ EXYNOS_4210_UPHYPWR_PHY1_SLEEP)
+
+#define EXYNOS_4210_UPHYPWR_HSCI0_SUSPEND (1 << 9)
+#define EXYNOS_4210_UPHYPWR_HSCI0_SLEEP (1 << 10)
+#define EXYNOS_4210_UPHYPWR_HSCI0 ( \
+ EXYNOS_4210_UPHYPWR_HSCI0_SUSPEND | \
+ EXYNOS_4210_UPHYPWR_HSCI0_SLEEP)
+
+#define EXYNOS_4210_UPHYPWR_HSCI1_SUSPEND (1 << 11)
+#define EXYNOS_4210_UPHYPWR_HSCI1_SLEEP (1 << 12)
+#define EXYNOS_4210_UPHYPWR_HSCI1 ( \
+ EXYNOS_4210_UPHYPWR_HSCI1_SUSPEND | \
+ EXYNOS_4210_UPHYPWR_HSCI1_SLEEP)
+
+/* PHY clock control */
+#define EXYNOS_4210_UPHYCLK 0x4
+
+#define EXYNOS_4210_UPHYCLK_PHYFSEL_MASK (0x3 << 0)
+#define EXYNOS_4210_UPHYCLK_PHYFSEL_48MHZ (0x0 << 0)
+#define EXYNOS_4210_UPHYCLK_PHYFSEL_24MHZ (0x3 << 0)
+#define EXYNOS_4210_UPHYCLK_PHYFSEL_12MHZ (0x2 << 0)
+
+#define EXYNOS_4210_UPHYCLK_PHY0_ID_PULLUP (0x1 << 2)
+#define EXYNOS_4210_UPHYCLK_PHY0_COMMON_ON (0x1 << 4)
+#define EXYNOS_4210_UPHYCLK_PHY1_COMMON_ON (0x1 << 7)
+
+/* PHY reset control */
+#define EXYNOS_4210_UPHYRST 0x8
+
+#define EXYNOS_4210_URSTCON_PHY0 (1 << 0)
+#define EXYNOS_4210_URSTCON_OTG_HLINK (1 << 1)
+#define EXYNOS_4210_URSTCON_OTG_PHYLINK (1 << 2)
+#define EXYNOS_4210_URSTCON_PHY1_ALL (1 << 3)
+#define EXYNOS_4210_URSTCON_PHY1_P0 (1 << 4)
+#define EXYNOS_4210_URSTCON_PHY1_P1P2 (1 << 5)
+#define EXYNOS_4210_URSTCON_HOST_LINK_ALL (1 << 6)
+#define EXYNOS_4210_URSTCON_HOST_LINK_P0 (1 << 7)
+#define EXYNOS_4210_URSTCON_HOST_LINK_P1 (1 << 8)
+#define EXYNOS_4210_URSTCON_HOST_LINK_P2 (1 << 9)
+
+/* Isolation, configured in the power management unit */
+#define EXYNOS_4210_USB_ISOL_DEVICE_OFFSET 0x0
+#define EXYNOS_4210_USB_ISOL_DEVICE (1 << 0)
+#define EXYNOS_4210_USB_ISOL_HOST_OFFSET 0x4
+#define EXYNOS_4210_USB_ISOL_HOST (1 << 0)
+
+/* USBYPHY1 Floating prevention */
+#define EXYNOS_4210_UPHY1CON 0x34
+#define EXYNOS_4210_UPHY1CON_FLOAT_PREVENTION 0x1
+
+enum exynos4210_phy_id {
+ EXYNOS4210_DEVICE,
+ EXYNOS4210_HOST,
+ EXYNOS4210_HSIC0,
+ EXYNOS4210_HSIC1,
+ EXYNOS4210_NUM_PHYS,
+};
+
+/* exynos4210_rate_to_clk() converts the supplied clock rate to the value that
+ * can be written to the phy register. */
+static u32 exynos4210_rate_to_clk(unsigned long rate)
+{
+ unsigned int clksel;
+
+ switch (rate) {
+ case 12 * MHZ:
+ clksel = EXYNOS_4210_UPHYCLK_PHYFSEL_12MHZ;
+ break;
+ case 24 * MHZ:
+ clksel = EXYNOS_4210_UPHYCLK_PHYFSEL_24MHZ;
+ break;
+ case 48 * MHZ:
+ clksel = EXYNOS_4210_UPHYCLK_PHYFSEL_48MHZ;
+ break;
+ default:
+ clksel = CLKSEL_ERROR;
+ }
+
+ return clksel;
+}
+
+static void exynos4210_isol(struct uphy_instance *inst, bool on)
+{
+ struct uphy_driver *drv = inst->drv;
+ u32 offset;
+ u32 mask;
+ u32 tmp;
+
+ if (!drv->reg_isol)
+ return;
+
+ switch (inst->cfg->id) {
+ case EXYNOS4210_DEVICE:
+ offset = EXYNOS_4210_USB_ISOL_DEVICE_OFFSET;
+ mask = EXYNOS_4210_USB_ISOL_DEVICE;
+ break;
+ case EXYNOS4210_HOST:
+ offset = EXYNOS_4210_USB_ISOL_HOST_OFFSET;
+ mask = EXYNOS_4210_USB_ISOL_HOST;
+ break;
+ default:
+ return;
+ };
+
+ tmp = readl(drv->reg_isol + offset);
+ if (on)
+ tmp &= ~mask;
+ else
+ tmp |= mask;
+ writel(tmp, drv->reg_isol + offset);
+}
+
+static void exynos4210_phy_pwr(struct uphy_instance *inst, bool on)
+{
+ struct uphy_driver *drv = inst->drv;
+ u32 rstbits = 0;
+ u32 phypwr = 0;
+ u32 rst;
+ u32 pwr;
+
+ switch (inst->cfg->id) {
+ case EXYNOS4210_DEVICE:
+ phypwr = EXYNOS_4210_UPHYPWR_PHY0;
+ rstbits = EXYNOS_4210_URSTCON_PHY0;
+ break;
+ case EXYNOS4210_HOST:
+ phypwr = EXYNOS_4210_UPHYPWR_PHY1;
+ rstbits = EXYNOS_4210_URSTCON_PHY1_ALL |
+ EXYNOS_4210_URSTCON_PHY1_P0 |
+ EXYNOS_4210_URSTCON_PHY1_P1P2 |
+ EXYNOS_4210_URSTCON_HOST_LINK_ALL |
+ EXYNOS_4210_URSTCON_HOST_LINK_P0;
+ writel(on, drv->reg_phy + EXYNOS_4210_UPHY1CON);
+ break;
+ case EXYNOS4210_HSIC0:
+ phypwr = EXYNOS_4210_UPHYPWR_HSCI0;
+ rstbits = EXYNOS_4210_URSTCON_PHY1_P1P2 |
+ EXYNOS_4210_URSTCON_HOST_LINK_P1;
+ break;
+ case EXYNOS4210_HSIC1:
+ phypwr = EXYNOS_4210_UPHYPWR_HSCI1;
+ rstbits = EXYNOS_4210_URSTCON_PHY1_P1P2 |
+ EXYNOS_4210_URSTCON_HOST_LINK_P2;
+ break;
+ };
+
+ if (on) {
+ writel(inst->clk, drv->reg_phy + EXYNOS_4210_UPHYCLK);
+
+ pwr = readl(drv->reg_phy + EXYNOS_4210_UPHYPWR);
+ pwr &= ~phypwr;
+ writel(pwr, drv->reg_phy + EXYNOS_4210_UPHYPWR);
+
+ rst = readl(drv->reg_phy + EXYNOS_4210_UPHYRST);
+ rst |= rstbits;
+ writel(rst, drv->reg_phy + EXYNOS_4210_UPHYRST);
+ udelay(10);
+ rst &= ~rstbits;
+ writel(rst, drv->reg_phy + EXYNOS_4210_UPHYRST);
+ } else {
+ pwr = readl(drv->reg_phy + EXYNOS_4210_UPHYPWR);
+ pwr |= phypwr;
+ writel(pwr, drv->reg_phy + EXYNOS_4210_UPHYPWR);
+ }
+}
+
+static int exynos4210_power_on(struct uphy_instance *inst)
+{
+ struct uphy_driver *drv = inst->drv;
+
+ if (inst->state == STATE_ON) {
+ dev_err(drv->dev, "usb phy \"%s\" already on",
+ inst->cfg->label);
+ return -ENODEV;
+ }
+ inst->state = STATE_ON;
+ inst->ref_cnt++;
+ if (inst->ref_cnt > 1)
+ return 0;
+
+ exynos4210_isol(inst, 0);
+ exynos4210_phy_pwr(inst, 1);
+
+ /* Power on the device, as it is necessary for HSIC to work */
+ if (inst->cfg->id == EXYNOS4210_HOST) {
+ struct uphy_instance *device =
+ &drv->uphy_instances[EXYNOS4210_DEVICE];
+ device->ref_cnt++;
+ if (device->ref_cnt > 1)
+ return 0;
+ exynos4210_phy_pwr(device, 1);
+ exynos4210_isol(device, 0);
+ }
+
+ return 0;
+}
+
+static int exynos4210_power_off(struct uphy_instance *inst)
+{
+ struct uphy_driver *drv = inst->drv;
+
+ if (inst->state == STATE_OFF) {
+ dev_err(drv->dev, "usb phy \"%s\" already off",
+ inst->cfg->label);
+ return -EINVAL;
+ }
+
+ inst->state = STATE_OFF;
+ inst->ref_cnt++;
+ if (inst->ref_cnt > 0)
+ return 0;
+
+ exynos4210_phy_pwr(inst, 0);
+ exynos4210_isol(inst, 1);
+
+ if (inst->cfg->id == EXYNOS4210_HOST) {
+ struct uphy_instance *device =
+ &drv->uphy_instances[EXYNOS4210_DEVICE];
+ device->ref_cnt--;
+ if (device->ref_cnt > 0)
+ return 0;
+ exynos4210_phy_pwr(device, 0);
+ exynos4210_isol(device, 1);
+ }
+
+ return 0;
+}
+
+
+static const struct common_phy exynos4210_phys[] = {
+ {
+ .label = "device",
+ .type = PHY_DEVICE,
+ .id = EXYNOS4210_DEVICE,
+ .rate_to_clk = exynos4210_rate_to_clk,
+ .power_on = exynos4210_power_on,
+ .power_off = exynos4210_power_off,
+ },
+ {
+ .label = "host",
+ .type = PHY_HOST,
+ .id = EXYNOS4210_HOST,
+ .rate_to_clk = exynos4210_rate_to_clk,
+ .power_on = exynos4210_power_on,
+ .power_off = exynos4210_power_off,
+ },
+ {
+ .label = "hsic0",
+ .type = PHY_HOST,
+ .id = EXYNOS4210_HSIC0,
+ .rate_to_clk = exynos4210_rate_to_clk,
+ .power_on = exynos4210_power_on,
+ .power_off = exynos4210_power_off,
+ },
+ {
+ .label = "hsic1",
+ .type = PHY_HOST,
+ .id = EXYNOS4210_HSIC1,
+ .rate_to_clk = exynos4210_rate_to_clk,
+ .power_on = exynos4210_power_on,
+ .power_off = exynos4210_power_off,
+ },
+ {},
+};
+
+const struct uphy_config exynos4210_uphy_config = {
+ .cpu = TYPE_EXYNOS4210,
+ .num_phys = EXYNOS4210_NUM_PHYS,
+ .phys = exynos4210_phys,
+};
+
diff --git a/drivers/phy/phy-exynos4212-usb.c b/drivers/phy/phy-exynos4212-usb.c
new file mode 100644
index 0000000..80480a4
--- /dev/null
+++ b/drivers/phy/phy-exynos4212-usb.c
@@ -0,0 +1,349 @@
+/*
+ * Samsung S5P/EXYNOS SoC series USB PHY driver
+ *
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * Author: Kamil Debski <k.debski@xxxxxxxxxxx>
+ *
+ * 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/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include "phy-exynos-usb.h"
+
+/* Exynos USB PHY registers */
+
+/* PHY power control */
+#define EXYNOS_4212_UPHYPWR 0x0
+
+#define EXYNOS_4212_UPHYPWR_DEV_SUSPEND (1 << 0)
+#define EXYNOS_4212_UPHYPWR_DEV_PWR (1 << 3)
+#define EXYNOS_4212_UPHYPWR_DEV_OTG_PWR (1 << 4)
+#define EXYNOS_4212_UPHYPWR_DEV_SLEEP (1 << 5)
+#define EXYNOS_4212_UPHYPWR_DEV ( \
+ EXYNOS_4212_UPHYPWR_DEV_SUSPEND | \
+ EXYNOS_4212_UPHYPWR_DEV_PWR | \
+ EXYNOS_4212_UPHYPWR_DEV_OTG_PWR | \
+ EXYNOS_4212_UPHYPWR_DEV_SLEEP)
+
+#define EXYNOS_4212_UPHYPWR_HOST_SUSPEND (1 << 6)
+#define EXYNOS_4212_UPHYPWR_HOST_PWR (1 << 7)
+#define EXYNOS_4212_UPHYPWR_HOST_SLEEP (1 << 8)
+#define EXYNOS_4212_UPHYPWR_HOST ( \
+ EXYNOS_4212_UPHYPWR_HOST_SUSPEND | \
+ EXYNOS_4212_UPHYPWR_HOST_PWR | \
+ EXYNOS_4212_UPHYPWR_HOST_SLEEP)
+
+#define EXYNOS_4212_UPHYPWR_HSCI0_SUSPEND (1 << 9)
+#define EXYNOS_4212_UPHYPWR_HSCI0_PWR (1 << 10)
+#define EXYNOS_4212_UPHYPWR_HSCI0_SLEEP (1 << 11)
+#define EXYNOS_4212_UPHYPWR_HSCI0 ( \
+ EXYNOS_4212_UPHYPWR_HSCI0_SUSPEND | \
+ EXYNOS_4212_UPHYPWR_HSCI0_PWR | \
+ EXYNOS_4212_UPHYPWR_HSCI0_SLEEP)
+
+#define EXYNOS_4212_UPHYPWR_HSCI1_SUSPEND (1 << 12)
+#define EXYNOS_4212_UPHYPWR_HSCI1_PWR (1 << 13)
+#define EXYNOS_4212_UPHYPWR_HSCI1_SLEEP (1 << 14)
+#define EXYNOS_4212_UPHYPWR_HSCI1 ( \
+ EXYNOS_4212_UPHYPWR_HSCI1_SUSPEND | \
+ EXYNOS_4212_UPHYPWR_HSCI1_PWR | \
+ EXYNOS_4212_UPHYPWR_HSCI1_SLEEP)
+
+/* PHY clock control */
+#define EXYNOS_4212_UPHYCLK 0x4
+
+#define EXYNOS_4212_UPHYCLK_PHYFSEL_MASK (0x7 << 0)
+#define EXYNOS_4212_UPHYCLK_PHYFSEL_9MHZ6 (0x0 << 0)
+#define EXYNOS_4212_UPHYCLK_PHYFSEL_10MHZ (0x1 << 0)
+#define EXYNOS_4212_UPHYCLK_PHYFSEL_12MHZ (0x2 << 0)
+#define EXYNOS_4212_UPHYCLK_PHYFSEL_19MHZ2 (0x3 << 0)
+#define EXYNOS_4212_UPHYCLK_PHYFSEL_20MHZ (0x4 << 0)
+#define EXYNOS_4212_UPHYCLK_PHYFSEL_24MHZ (0x5 << 0)
+#define EXYNOS_4212_UPHYCLK_PHYFSEL_50MHZ (0x7 << 0)
+
+#define EXYNOS_4212_UPHYCLK_PHY0_ID_PULLUP (0x1 << 3)
+#define EXYNOS_4212_UPHYCLK_PHY0_COMMON_ON (0x1 << 4)
+#define EXYNOS_4212_UPHYCLK_PHY1_COMMON_ON (0x1 << 7)
+
+#define EXYNOS_4212_UPHYCLK_HSIC_REFCLK_MASK (0x7f << 10)
+#define EXYNOS_4212_UPHYCLK_HSIC_REFCLK_12MHZ (0x24 << 10)
+#define EXYNOS_4212_UPHYCLK_HSIC_REFCLK_15MHZ (0x1c << 10)
+#define EXYNOS_4212_UPHYCLK_HSIC_REFCLK_16MHZ (0x1a << 10)
+#define EXYNOS_4212_UPHYCLK_HSIC_REFCLK_19MHZ2 (0x15 << 10)
+#define EXYNOS_4212_UPHYCLK_HSIC_REFCLK_20MHZ (0x14 << 10)
+
+/* PHY reset control */
+#define EXYNOS_4212_UPHYRST 0x8
+
+#define EXYNOS_4212_URSTCON_DEVICE (1 << 0)
+#define EXYNOS_4212_URSTCON_OTG_HLINK (1 << 1)
+#define EXYNOS_4212_URSTCON_OTG_PHYLINK (1 << 2)
+#define EXYNOS_4212_URSTCON_HOST_PHY (1 << 3)
+#define EXYNOS_4212_URSTCON_PHY1 (1 << 4)
+#define EXYNOS_4212_URSTCON_HSIC0 (1 << 5)
+#define EXYNOS_4212_URSTCON_HSIC1 (1 << 6)
+#define EXYNOS_4212_URSTCON_HOST_LINK_ALL (1 << 7)
+#define EXYNOS_4212_URSTCON_HOST_LINK_P0 (1 << 8)
+#define EXYNOS_4212_URSTCON_HOST_LINK_P1 (1 << 9)
+#define EXYNOS_4212_URSTCON_HOST_LINK_P2 (1 << 10)
+
+/* Isolation, configured in the power management unit */
+#define EXYNOS_4212_USB_ISOL_OFFSET 0x0
+#define EXYNOS_4212_USB_ISOL_OTG (1 << 0)
+#define EXYNOS_4212_USB_ISOL_HSIC0_OFFSET 0x4
+#define EXYNOS_4212_USB_ISOL_HSIC0 (1 << 0)
+#define EXYNOS_4212_USB_ISOL_HSIC1_OFFSET 0x8
+#define EXYNOS_4212_USB_ISOL_HSIC1 (1 << 0)
+
+enum exynos4x12_phy_id {
+ EXYNOS4212_DEVICE,
+ EXYNOS4212_HOST,
+ EXYNOS4212_HSIC0,
+ EXYNOS4212_HSIC1,
+ EXYNOS4212_NUM_PHYS,
+};
+
+/* exynos4212_rate_to_clk() converts the supplied clock rate to the value that
+ * can be written to the phy register. */
+static u32 exynos4212_rate_to_clk(unsigned long rate)
+{
+ unsigned int clksel;
+
+ /* EXYNOS_4212_UPHYCLK_PHYFSEL_MASK */
+
+ switch (rate) {
+ case 9600 * KHZ:
+ clksel = EXYNOS_4212_UPHYCLK_PHYFSEL_9MHZ6;
+ break;
+ case 10 * MHZ:
+ clksel = EXYNOS_4212_UPHYCLK_PHYFSEL_10MHZ;
+ break;
+ case 12 * MHZ:
+ clksel = EXYNOS_4212_UPHYCLK_PHYFSEL_12MHZ;
+ break;
+ case 19200 * KHZ:
+ clksel = EXYNOS_4212_UPHYCLK_PHYFSEL_19MHZ2;
+ break;
+ case 20 * MHZ:
+ clksel = EXYNOS_4212_UPHYCLK_PHYFSEL_20MHZ;
+ break;
+ case 24 * MHZ:
+ clksel = EXYNOS_4212_UPHYCLK_PHYFSEL_24MHZ;
+ break;
+ case 50 * MHZ:
+ clksel = EXYNOS_4212_UPHYCLK_PHYFSEL_50MHZ;
+ break;
+ default:
+ clksel = CLKSEL_ERROR;
+ }
+
+ return clksel;
+}
+
+static void exynos4212_isol(struct uphy_instance *inst, bool on)
+{
+ struct uphy_driver *drv = inst->drv;
+ u32 offset;
+ u32 mask;
+ u32 tmp;
+
+ if (!drv->reg_isol)
+ return;
+
+ switch (inst->cfg->id) {
+ case EXYNOS4212_DEVICE:
+ offset = EXYNOS_4212_USB_ISOL_OFFSET;
+ mask = EXYNOS_4212_USB_ISOL_OTG;
+ break;
+ case EXYNOS4212_HOST:
+ offset = EXYNOS_4212_USB_ISOL_OFFSET;
+ mask = EXYNOS_4212_USB_ISOL_OTG;
+ break;
+ case EXYNOS4212_HSIC0:
+ offset = EXYNOS_4212_USB_ISOL_HSIC0_OFFSET;
+ mask = EXYNOS_4212_USB_ISOL_HSIC0;
+ break;
+ case EXYNOS4212_HSIC1:
+ offset = EXYNOS_4212_USB_ISOL_HSIC1_OFFSET;
+ mask = EXYNOS_4212_USB_ISOL_HSIC1;
+ break;
+ default:
+ return;
+ };
+
+ tmp = readl(drv->reg_isol + offset);
+ if (on)
+ tmp &= ~mask;
+ else
+ tmp |= mask;
+ writel(tmp, drv->reg_isol + offset);
+}
+
+static void exynos4212_phy_pwr(struct uphy_instance *inst, bool on)
+{
+ struct uphy_driver *drv = inst->drv;
+ u32 rstbits = 0;
+ u32 phypwr = 0;
+ u32 rst;
+ u32 pwr;
+
+ switch (inst->cfg->id) {
+ case EXYNOS4212_DEVICE:
+ phypwr = EXYNOS_4212_UPHYPWR_DEV;
+ rstbits = EXYNOS_4212_URSTCON_DEVICE;
+ break;
+ case EXYNOS4212_HOST:
+ phypwr = EXYNOS_4212_UPHYPWR_HOST;
+ rstbits = EXYNOS_4212_URSTCON_HOST_PHY;
+ break;
+ case EXYNOS4212_HSIC0:
+ phypwr = EXYNOS_4212_UPHYPWR_HSCI0;
+ rstbits = EXYNOS_4212_URSTCON_HSIC1 |
+ EXYNOS_4212_URSTCON_HOST_LINK_P0 |
+ EXYNOS_4212_URSTCON_HOST_PHY;
+ break;
+ case EXYNOS4212_HSIC1:
+ phypwr = EXYNOS_4212_UPHYPWR_HSCI1;
+ rstbits = EXYNOS_4212_URSTCON_HSIC1 |
+ EXYNOS_4212_URSTCON_HOST_LINK_P1;
+ break;
+ };
+
+ if (on) {
+ writel(inst->clk, drv->reg_phy + EXYNOS_4212_UPHYCLK);
+
+ pwr = readl(drv->reg_phy + EXYNOS_4212_UPHYPWR);
+ pwr &= ~phypwr;
+ writel(pwr, drv->reg_phy + EXYNOS_4212_UPHYPWR);
+
+ rst = readl(drv->reg_phy + EXYNOS_4212_UPHYRST);
+ rst |= rstbits;
+ writel(rst, drv->reg_phy + EXYNOS_4212_UPHYRST);
+ udelay(10);
+ rst &= ~rstbits;
+ writel(rst, drv->reg_phy + EXYNOS_4212_UPHYRST);
+ } else {
+ pwr = readl(drv->reg_phy + EXYNOS_4212_UPHYPWR);
+ pwr |= phypwr;
+ writel(pwr, drv->reg_phy + EXYNOS_4212_UPHYPWR);
+ }
+}
+
+static int exynos4212_power_on(struct uphy_instance *inst)
+{
+ struct uphy_driver *drv = inst->drv;
+
+ if (inst->state == STATE_ON) {
+ dev_err(drv->dev, "usb phy \"%s\" already on",
+ inst->cfg->label);
+ return -ENODEV;
+ }
+
+ inst->state = STATE_ON;
+ inst->ref_cnt++;
+ if (inst->ref_cnt > 1)
+ return 0;
+
+ exynos4212_isol(inst, 0);
+ exynos4212_phy_pwr(inst, 1);
+
+ /* Power on the device, as it is necessary for HSIC to work */
+ if (inst->cfg->id == EXYNOS4212_HSIC0) {
+ struct uphy_instance *device =
+ &drv->uphy_instances[EXYNOS4212_DEVICE];
+ device->ref_cnt++;
+ if (device->ref_cnt > 1)
+ return 0;
+ exynos4212_phy_pwr(device, 1);
+ exynos4212_isol(device, 0);
+ }
+
+ return 0;
+}
+
+static int exynos4212_power_off(struct uphy_instance *inst)
+{
+ struct uphy_driver *drv = inst->drv;
+
+ if (inst->state == STATE_OFF) {
+ dev_err(drv->dev, "usb phy \"%s\" already off",
+ inst->cfg->label);
+ return -EINVAL;
+ }
+
+ inst->state = STATE_OFF;
+ inst->ref_cnt--;
+
+ if (inst->ref_cnt > 0)
+ return 0;
+
+ exynos4212_phy_pwr(inst, 0);
+ exynos4212_isol(inst, 1);
+
+ if (inst->cfg->id == EXYNOS4212_HSIC0) {
+ struct uphy_instance *device =
+ &drv->uphy_instances[EXYNOS4212_DEVICE];
+ device->ref_cnt--;
+ if (device->ref_cnt > 0)
+ return 0;
+ exynos4212_phy_pwr(device, 0);
+ exynos4212_isol(device, 1);
+ }
+
+ return 0;
+}
+
+
+static const struct common_phy exynos4212_phys[] = {
+ {
+ .label = "device",
+ .type = PHY_DEVICE,
+ .id = EXYNOS4212_DEVICE,
+ .rate_to_clk = exynos4212_rate_to_clk,
+ .power_on = exynos4212_power_on,
+ .power_off = exynos4212_power_off,
+ },
+ {
+ .label = "host",
+ .type = PHY_HOST,
+ .id = EXYNOS4212_HOST,
+ .rate_to_clk = exynos4212_rate_to_clk,
+ .power_on = exynos4212_power_on,
+ .power_off = exynos4212_power_off,
+ },
+ {
+ .label = "hsic0",
+ .type = PHY_HOST,
+ .id = EXYNOS4212_HSIC0,
+ .rate_to_clk = exynos4212_rate_to_clk,
+ .power_on = exynos4212_power_on,
+ .power_off = exynos4212_power_off,
+ },
+ {
+ .label = "hsic1",
+ .type = PHY_HOST,
+ .id = EXYNOS4212_HSIC1,
+ .rate_to_clk = exynos4212_rate_to_clk,
+ .power_on = exynos4212_power_on,
+ .power_off = exynos4212_power_off,
+ },
+ {},
+};
+
+const struct uphy_config exynos4212_uphy_config = {
+ .cpu = TYPE_EXYNOS4212,
+ .num_phys = EXYNOS4212_NUM_PHYS,
+ .phys = exynos4212_phys,
+};
+
--
1.7.9.5
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