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/*
* Copyright (C) 2011 Samsung Electronics Co.Ltd
* Author: 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/map.h>
#include <plat/cpu.h>
#include <plat/regs-usb-hsotg-phy.h>
#include <plat/usb-phy.h>
#include "regs-sys.h"
static int s3c_usb_otgphy_init(struct platform_device *pdev)
{
struct clk *xusbxti;
u32 phyclk;
writel(readl(S3C64XX_OTHERS) | S3C64XX_OTHERS_USBMASK, S3C64XX_OTHERS);
/* set clock frequency for PLL */
phyclk = readl(S3C_PHYCLK) & ~S3C_PHYCLK_CLKSEL_MASK;
xusbxti = clk_get(&pdev->dev, "xusbxti");
if (xusbxti && !IS_ERR(xusbxti)) {
switch (clk_get_rate(xusbxti)) {
case 12 * MHZ:
phyclk |= S3C_PHYCLK_CLKSEL_12M;
break;
case 24 * MHZ:
phyclk |= S3C_PHYCLK_CLKSEL_24M;
break;
default:
case 48 * MHZ:
/* default reference clock */
break;
}
clk_put(xusbxti);
}
/* TODO: select external clock/oscillator */
writel(phyclk | S3C_PHYCLK_CLK_FORCE, S3C_PHYCLK);
/* set to normal OTG PHY */
writel((readl(S3C_PHYPWR) & ~S3C_PHYPWR_NORMAL_MASK), S3C_PHYPWR);
mdelay(1);
/* reset OTG PHY and Link */
writel(S3C_RSTCON_PHY | S3C_RSTCON_HCLK | S3C_RSTCON_PHYCLK,
S3C_RSTCON);
udelay(20); /* at-least 10uS */
writel(0, S3C_RSTCON);
return 0;
}
static int s3c_usb_otgphy_exit(struct platform_device *pdev)
{
writel((readl(S3C_PHYPWR) | S3C_PHYPWR_ANALOG_POWERDOWN |
S3C_PHYPWR_OTG_DISABLE), S3C_PHYPWR);
writel(readl(S3C64XX_OTHERS) & ~S3C64XX_OTHERS_USBMASK, S3C64XX_OTHERS);
return 0;
}
int s5p_usb_phy_init(struct platform_device *pdev, int type)
{
if (type == S5P_USB_PHY_DEVICE)
return s3c_usb_otgphy_init(pdev);
return -EINVAL;
}
int s5p_usb_phy_exit(struct platform_device *pdev, int type)
{
if (type == S5P_USB_PHY_DEVICE)
return s3c_usb_otgphy_exit(pdev);
return -EINVAL;
}
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