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Date: Fri, 06 Dec 2013 11:31:37 +0100
From: Kamil Debski <k.debski@...sung.com>
To: linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
linux-usb@...r.kernel.org, devicetree@...r.kernel.org
Cc: kyungmin.park@...sung.com, kishon@...com, t.figa@...sung.com,
s.nawrocki@...sung.com, m.szyprowski@...sung.com,
gautam.vivek@...sung.com, mat.krawczuk@...il.com,
yulgon.kim@...sung.com, p.paneri@...sung.com,
av.tikhomirov@...sung.com, jg1.han@...sung.com,
galak@...eaurora.org, matt.porter@...aro.org, k.debski@...sung.com
Subject: [PATCH v4 6/9] phy: Add support for S5PV210 to the Exynos USB PHY
driver
From: Mateusz Krawczuk <mat.krawczuk@...il.com>
Add support for the Samsung's S5PV210 SoC to the Exynos USB PHY driver.
Signed-off-by: Mateusz Krawczuk <m.krawczuk@...tner.samsung.com>
[k.debski@...sung.com: cleanup and commit description]
[k.debski@...sung.com: make changes accordingly to the mailing list
comments]
Signed-off-by: Kamil Debski <k.debski@...sung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
---
.../devicetree/bindings/phy/samsung-usbphy.txt | 1 +
drivers/phy/Kconfig | 7 +
drivers/phy/Makefile | 1 +
drivers/phy/phy-s5pv210-usb2.c | 206 ++++++++++++++++++++
drivers/phy/phy-samsung-usb2.c | 6 +
drivers/phy/phy-samsung-usb2.h | 1 +
6 files changed, 222 insertions(+)
create mode 100644 drivers/phy/phy-s5pv210-usb2.c
diff --git a/Documentation/devicetree/bindings/phy/samsung-usbphy.txt b/Documentation/devicetree/bindings/phy/samsung-usbphy.txt
index cadbf70..77a8e9c 100644
--- a/Documentation/devicetree/bindings/phy/samsung-usbphy.txt
+++ b/Documentation/devicetree/bindings/phy/samsung-usbphy.txt
@@ -3,6 +3,7 @@ Samsung S5P/EXYNOS SoC series USB PHY
Required properties:
- compatible : should be one of the listed compatibles:
+ - "samsung,s5pv210-usb2-phy"
- "samsung,exynos4210-usb2-phy"
- "samsung,exynos4212-usb2-phy"
- reg : a list of registers used by phy driver
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index b29018f..2e433cd 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -58,6 +58,13 @@ config PHY_SAMSUNG_USB2
This driver provides common interface to interact, for Samsung
USB 2.0 PHY driver.
+config PHY_S5PV210_USB2
+ bool "Support for S5PV210"
+ depends on PHY_SAMSUNG_USB2
+ depends on ARCH_S5PV210
+ help
+ Enable USB PHY support for S5PV210
+
config PHY_EXYNOS4210_USB2
bool "Support for Exynos 4210"
depends on PHY_SAMSUNG_USB2
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 9f4befd..fefc6c2 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -8,5 +8,6 @@ obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o
obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o
obj-$(CONFIG_TWL4030_USB) += phy-twl4030-usb.o
obj-$(CONFIG_PHY_SAMSUNG_USB2) += phy-samsung-usb2.o
+obj-$(CONFIG_PHY_S5PV210_USB2) += phy-s5pv210-usb2.o
obj-$(CONFIG_PHY_EXYNOS4210_USB2) += phy-exynos4210-usb2.o
obj-$(CONFIG_PHY_EXYNOS4212_USB2) += phy-exynos4212-usb2.o
diff --git a/drivers/phy/phy-s5pv210-usb2.c b/drivers/phy/phy-s5pv210-usb2.c
new file mode 100644
index 0000000..528a114
--- /dev/null
+++ b/drivers/phy/phy-s5pv210-usb2.c
@@ -0,0 +1,206 @@
+/*
+ * Samsung SoC USB 1.1/2.0 PHY driver - S5PV210 support
+ *
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * Authors: Kamil Debski <k.debski@...sung.com>
+ *
+ * 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-samsung-usb2.h"
+
+/* Exynos USB PHY registers */
+
+/* PHY power control */
+#define S5PV210_UPHYPWR 0x0
+
+#define S5PV210_UPHYPWR_PHY0_SUSPEND (1 << 0)
+#define S5PV210_UPHYPWR_PHY0_PWR (1 << 3)
+#define S5PV210_UPHYPWR_PHY0_OTG_PWR (1 << 4)
+#define S5PV210_UPHYPWR_PHY0 ( \
+ S5PV210_UPHYPWR_PHY0_SUSPEND | \
+ S5PV210_UPHYPWR_PHY0_PWR | \
+ S5PV210_UPHYPWR_PHY0_OTG_PWR)
+
+#define S5PV210_UPHYPWR_PHY1_SUSPEND (1 << 6)
+#define S5PV210_UPHYPWR_PHY1_PWR (1 << 7)
+#define S5PV210_UPHYPWR_PHY1 ( \
+ S5PV210_UPHYPWR_PHY1_SUSPEND | \
+ S5PV210_UPHYPWR_PHY1_PWR)
+
+/* PHY clock control */
+#define S5PV210_UPHYCLK 0x4
+
+#define S5PV210_UPHYCLK_PHYFSEL_MASK (0x3 << 0)
+#define S5PV210_UPHYCLK_PHYFSEL_48MHZ (0x0 << 0)
+#define S5PV210_UPHYCLK_PHYFSEL_24MHZ (0x3 << 0)
+#define S5PV210_UPHYCLK_PHYFSEL_12MHZ (0x2 << 0)
+
+#define S5PV210_UPHYCLK_PHY0_ID_PULLUP (0x1 << 2)
+#define S5PV210_UPHYCLK_PHY0_COMMON_ON (0x1 << 4)
+#define S5PV210_UPHYCLK_PHY1_COMMON_ON (0x1 << 7)
+
+/* PHY reset control */
+#define S5PV210_UPHYRST 0x8
+
+#define S5PV210_URSTCON_PHY0 (1 << 0)
+#define S5PV210_URSTCON_OTG_HLINK (1 << 1)
+#define S5PV210_URSTCON_OTG_PHYLINK (1 << 2)
+#define S5PV210_URSTCON_PHY1_ALL (1 << 3)
+#define S5PV210_URSTCON_HOST_LINK_ALL (1 << 4)
+
+/* Isolation, configured in the power management unit */
+#define S5PV210_USB_ISOL_DEVICE_OFFSET 0x704
+#define S5PV210_USB_ISOL_DEVICE (1 << 0)
+#define S5PV210_USB_ISOL_HOST_OFFSET 0x708
+#define S5PV210_USB_ISOL_HOST (1 << 1)
+
+
+enum s5pv210_phy_id {
+ S5PV210_DEVICE,
+ S5PV210_HOST,
+ S5PV210_NUM_PHYS,
+};
+
+/*
+ * s5pv210_rate_to_clk() converts the supplied clock rate to the value that
+ * can be written to the phy register.
+ */
+static int s5pv210_rate_to_clk(unsigned long rate, u32 *reg)
+{
+ pr_info("%lu\n", rate);
+ switch (rate) {
+ case 12 * MHZ:
+ *reg = S5PV210_UPHYCLK_PHYFSEL_12MHZ;
+ break;
+ case 24 * MHZ:
+ *reg = S5PV210_UPHYCLK_PHYFSEL_24MHZ;
+ break;
+ case 48 * MHZ:
+ *reg = S5PV210_UPHYCLK_PHYFSEL_48MHZ;
+ break;
+ default:
+ return -EINVAL;
+ }
+}
+
+static void s5pv210_isol(struct samsung_usb2_phy_instance *inst, bool on)
+{
+ struct samsung_usb2_phy_driver *drv = inst->drv;
+ u32 mask;
+ u32 tmp;
+
+ if (!drv->reg_isol)
+ return;
+
+ switch (inst->cfg->id) {
+ case S5PV210_DEVICE:
+ mask = S5PV210_USB_ISOL_DEVICE;
+ break;
+ case S5PV210_HOST:
+ mask = S5PV210_USB_ISOL_HOST;
+ break;
+ default:
+ return;
+ };
+
+ regmap_update_bits(drv->reg_pmu, offset, mask, on ? 0 : mask);
+}
+
+static void s5pv210_phy_pwr(struct samsung_usb2_phy_instance *inst, bool on)
+{
+ struct samsung_usb2_phy_driver *drv = inst->drv;
+ u32 rstbits = 0;
+ u32 phypwr = 0;
+ u32 rst;
+ u32 pwr;
+
+ switch (inst->cfg->id) {
+ case S5PV210_DEVICE:
+ phypwr = S5PV210_UPHYPWR_PHY0;
+ rstbits = S5PV210_URSTCON_PHY0;
+ break;
+ case S5PV210_HOST:
+ phypwr = S5PV210_UPHYPWR_PHY1;
+ rstbits = S5PV210_URSTCON_PHY1_ALL |
+ S5PV210_URSTCON_HOST_LINK_ALL;
+ break;
+ };
+
+ if (on) {
+ writel(inst->clk, drv->reg_phy + S5PV210_UPHYCLK);
+
+ pwr = readl(drv->reg_phy + S5PV210_UPHYPWR);
+ pwr &= ~phypwr;
+ writel(pwr, drv->reg_phy + S5PV210_UPHYPWR);
+
+ rst = readl(drv->reg_phy + S5PV210_UPHYRST);
+ rst |= rstbits;
+ writel(rst, drv->reg_phy + S5PV210_UPHYRST);
+ udelay(10);
+ rst &= ~rstbits;
+ writel(rst, drv->reg_phy + S5PV210_UPHYRST);
+ } else {
+ pwr = readl(drv->reg_phy + S5PV210_UPHYPWR);
+ pwr |= phypwr;
+ writel(pwr, drv->reg_phy + S5PV210_UPHYPWR);
+ }
+}
+
+static int s5pv210_power_on(struct samsung_usb2_phy_instance *inst)
+{
+ struct samsung_usb2_phy_driver *drv = inst->drv;
+
+ s5pv210_isol(inst, 0);
+ s5pv210_phy_pwr(inst, 1);
+
+ return 0;
+}
+
+static int s5pv210_power_off(struct samsung_usb2_phy_instance *inst)
+{
+ struct samsung_usb2_phy_driver *drv = inst->drv;
+
+ s5pv210_phy_pwr(inst, 0);
+ s5pv210_isol(inst, 1);
+
+ return 0;
+}
+
+
+static const struct samsung_usb2_common_phy s5pv210_phys[] = {
+ {
+ .label = "device",
+ .id = S5PV210_DEVICE,
+ .rate_to_clk = s5pv210_rate_to_clk,
+ .power_on = s5pv210_power_on,
+ .power_off = s5pv210_power_off,
+ },
+ {
+ .label = "host",
+ .id = S5PV210_HOST,
+ .rate_to_clk = s5pv210_rate_to_clk,
+ .power_on = s5pv210_power_on,
+ .power_off = s5pv210_power_off,
+ },
+ {},
+};
+
+const struct samsung_usb2_phy_config s5pv210_usb2_phy_config = {
+ .cpu = TYPE_S5PV210,
+ .num_phys = S5PV210_NUM_PHYS,
+ .phys = s5pv210_phys,
+};
+
diff --git a/drivers/phy/phy-samsung-usb2.c b/drivers/phy/phy-samsung-usb2.c
index 804ec77..ef93fd3 100644
--- a/drivers/phy/phy-samsung-usb2.c
+++ b/drivers/phy/phy-samsung-usb2.c
@@ -98,6 +98,12 @@ static struct phy *samsung_usb2_phy_xlate(struct device *dev,
}
static const struct of_device_id samsung_usb2_phy_of_match[] = {
+#ifdef CONFIG_PHY_S5PV210_USB2
+ {
+ .compatible = "samsung,s5pv210-usb2-phy",
+ .data = &s5pv210_usb2_phy_config,
+ },
+#endif
#ifdef CONFIG_PHY_EXYNOS4210_USB2
{
.compatible = "samsung,exynos4210-usb2-phy",
diff --git a/drivers/phy/phy-samsung-usb2.h b/drivers/phy/phy-samsung-usb2.h
index cd12477..0f51dbb 100644
--- a/drivers/phy/phy-samsung-usb2.h
+++ b/drivers/phy/phy-samsung-usb2.h
@@ -66,6 +66,7 @@ struct samsung_usb2_phy_config {
char has_mode_switch;
};
+extern const struct samsung_usb2_phy_config s5pv210_usb2_phy_config;
extern const struct samsung_usb2_phy_config exynos4210_usb2_phy_config;
extern const struct samsung_usb2_phy_config exynos4212_usb2_phy_config;
#endif
--
1.7.9.5
--
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