/* * Copyright (C) 2012 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 version 2 as * published by the Free Software Foundationr */ #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 <mach/regs-sys.h> #include <plat/cpu.h> #include <plat/regs-usb-hsotg-phy.h> #include <plat/usb-phy.h> static int s5pv210_usb_otgphy_init(struct platform_device *pdev) { struct clk *xusbxti; u32 phyclk; writel(readl(S5PV210_USB_PHY_CON) | S5PV210_USB_PHY0_EN, S5PV210_USB_PHY_CON); /* 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 s5pv210_usb_otgphy_exit(struct platform_device *pdev) { writel((readl(S3C_PHYPWR) | S3C_PHYPWR_ANALOG_POWERDOWN | S3C_PHYPWR_OTG_DISABLE), S3C_PHYPWR); writel(readl(S5PV210_USB_PHY_CON) & ~S5PV210_USB_PHY0_EN, S5PV210_USB_PHY_CON); return 0; } int s5p_usb_phy_init(struct platform_device *pdev, int type) { if (type == S5P_USB_PHY_DEVICE) return s5pv210_usb_otgphy_init(pdev); return -EINVAL; } int s5p_usb_phy_exit(struct platform_device *pdev, int type) { if (type == S5P_USB_PHY_DEVICE) return s5pv210_usb_otgphy_exit(pdev); return -EINVAL; }