[RFC][PATCH 4/5] ARM: S5P64x0: Adding OTG PHY control code

[p.paneri@samsung.com]

From: Praveen Paneri <p.paneri@samsung.com>

A generic method to initialize and exit OTG PHY which can be
used for all the samsung SoCs.
OTG platdata structure added in platform to pass required
platform specific functions and data to the driver.

Signed-off-by: Praveen Paneri <p.paneri@samsung.com>
---
 arch/arm/mach-s5p64x0/Makefile           |    1 +
 arch/arm/mach-s5p64x0/include/mach/map.h |    4 +
 arch/arm/mach-s5p64x0/setup-otg-phy.c    |   89 ++++++++++++++++++++++++++++++
 arch/arm/plat-s5p/include/plat/otg.h     |   29 ++++++++++
 4 files changed, 123 insertions(+), 0 deletions(-)
 create mode 100644 arch/arm/mach-s5p64x0/setup-otg-phy.c
 create mode 100644 arch/arm/plat-s5p/include/plat/otg.h

diff --git a/arch/arm/mach-s5p64x0/Makefile b/arch/arm/mach-s5p64x0/Makefile
index ae6bf6f..611fb3a 100644
--- a/arch/arm/mach-s5p64x0/Makefile
+++ b/arch/arm/mach-s5p64x0/Makefile
@@ -28,3 +28,4 @@ obj-y				+= dev-audio.o
 obj-$(CONFIG_S3C64XX_DEV_SPI)	+= dev-spi.o
 
 obj-$(CONFIG_S5P64X0_SETUP_I2C1)	+= setup-i2c1.o
+obj-$(CONFIG_S3C_DEV_DWC_OTG)	+= setup-otg-phy.o
diff --git a/arch/arm/mach-s5p64x0/include/mach/map.h b/arch/arm/mach-s5p64x0/include/mach/map.h
index 95c9125..717c279 100644
--- a/arch/arm/mach-s5p64x0/include/mach/map.h
+++ b/arch/arm/mach-s5p64x0/include/mach/map.h
@@ -44,6 +44,8 @@
 #define S5P64X0_PA_SPI1		0xEC500000
 
 #define S5P64X0_PA_HSOTG	0xED100000
+#define S5P64X0_PA_USB_HSPHY	0xED200000
+#define S5P64X0_VA_USB_HSPHY	S3C_ADDR_CPU(0x00100000)
 
 #define S5P64X0_PA_HSMMC(x)	(0xED800000 + ((x) * 0x100000))
 
@@ -71,6 +73,8 @@
 #define S5P_PA_TIMER		S5P64X0_PA_TIMER
 
 #define SAMSUNG_PA_ADC		S5P64X0_PA_ADC
+#define S3C_PA_USB_HSOTG	S5P64X0_PA_HSOTG
+#define S3C_VA_USB_HSPHY        S5P64X0_VA_USB_HSPHY
 
 /* UART */
 
diff --git a/arch/arm/mach-s5p64x0/setup-otg-phy.c b/arch/arm/mach-s5p64x0/setup-otg-phy.c
new file mode 100644
index 0000000..c351554
--- /dev/null
+++ b/arch/arm/mach-s5p64x0/setup-otg-phy.c
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2011 Samsung Electronics Co.Ltd
+ * Author: Praveen Paneri <p.paneri@samsung.com>
+ * based on arch/arm/mach-exynos4/setup-usb-phy.c
+ * written by Joonyoung Shim <jy0922.shim@samsung.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.
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <mach/regs-clock.h>
+#include <mach/gpio.h>
+#include <plat/regs-usb-hsotg-phy.h>
+#include <plat/usb-phy.h>
+
+struct clk *otg_clk;
+static int s5p64x0_otg_phy_init(struct platform_device *pdev)
+{
+	int err;
+
+	otg_clk = clk_get(&pdev->dev, "otg");
+	if (IS_ERR(otg_clk)) {
+		dev_err(&pdev->dev, "Failed to get otg clock\n");
+		return PTR_ERR(otg_clk);
+	}
+
+	err = clk_enable(otg_clk);
+	if (err) {
+		clk_put(otg_clk);
+		return err;
+	}
+
+	if (gpio_is_valid(S5P6440_GPN(1))) {
+		err = gpio_request(S5P6440_GPN(1), "GPN");
+		if (err)
+			printk(KERN_ERR "failed to request GPN1\n");
+		gpio_direction_output(S5P6440_GPN(1), 1);
+	}
+
+	writel(readl(S5P64X0_OTHERS)&~S5P64X0_OTHERS_USB_SIG_MASK,
+							S5P64X0_OTHERS);
+	writel(0x0, S3C_PHYPWR);         /* Power up */
+	writel(S3C_PHYCLK_CLKSEL_12M, S3C_PHYCLK);
+	writel(S3C_RSTCON_PHY, S3C_RSTCON);
+
+	udelay(50);
+	writel(0x0, S3C_RSTCON);
+	udelay(50);
+
+	return 0;
+}
+
+static int s5p64x0_otg_phy_exit(struct platform_device *pdev)
+{
+	writel(readl(S3C_PHYPWR)|(0x1F<<1), S3C_PHYPWR);
+	writel(readl(S5P64X0_OTHERS)&~S5P64X0_OTHERS_USB_SIG_MASK,
+							S5P64X0_OTHERS);
+
+	gpio_free(S5P6440_GPN(1));
+
+	clk_disable(otg_clk);
+	clk_put(otg_clk);
+
+	return 0;
+}
+
+int s5p_usb_phy_init(struct platform_device *pdev, int type)
+{
+	if (type == S5P_USB_PHY_DEVICE)
+		return s5p64x0_otg_phy_init(pdev);
+
+	return -EINVAL;
+}
+
+int s5p_usb_phy_exit(struct platform_device *pdev, int type)
+{
+	if (type == S5P_USB_PHY_DEVICE)
+		return s5p64x0_otg_phy_exit(pdev);
+
+	return -EINVAL;
+}
diff --git a/arch/arm/plat-s5p/include/plat/otg.h b/arch/arm/plat-s5p/include/plat/otg.h
new file mode 100644
index 0000000..3111dcc
--- /dev/null
+++ b/arch/arm/plat-s5p/include/plat/otg.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2011 Samsung Electronics Co.Ltd
+ * Author: Praveen Paneri <p.paneri@samsung.com>
+ * based on arch/arm/plat-s5p/include/plat/usb-phy.h
+ * written by Joonyoung Shim <jy0922.shim@samsung.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.
+ */
+
+#ifndef __PLAT_S5P_OTG_H
+#define __PLAT_S5P_OTG_H
+
+struct s5p_otg_platdata {
+	int (*phy_init)(struct platform_device *pdev, int type);
+	int (*phy_exit)(struct platform_device *pdev, int type);
+	u32 dev_rx_fifo_size;
+	u32 dev_nptx_fifo_size;
+	u32 host_rx_fifo_size;
+	u32 host_nptx_fifo_size;
+	u32 host_ch_num;
+
+};
+
+extern void s5p_otg_set_platdata(struct s5p_otg_platdata *pd);
+
+#endif /* __PLAT_S5P_OTG_H */
-- 
1.7.0.4