diff options
Diffstat (limited to 'arch/arm/mach-exynos/setup-usb-phy.c')
| -rw-r--r-- | arch/arm/mach-exynos/setup-usb-phy.c | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/arch/arm/mach-exynos/setup-usb-phy.c b/arch/arm/mach-exynos/setup-usb-phy.c deleted file mode 100644 index 6af40662a44..00000000000 --- a/arch/arm/mach-exynos/setup-usb-phy.c +++ /dev/null @@ -1,223 +0,0 @@ -/* - * 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/regs-pmu.h> -#include <mach/regs-usb-phy.h> -#include <plat/cpu.h> -#include <plat/usb-phy.h> - -static atomic_t host_usage; - -static int exynos4_usb_host_phy_is_on(void) -{ - return (readl(EXYNOS4_PHYPWR) & PHY1_STD_ANALOG_POWERDOWN) ? 0 : 1; -} - -static void exynos4210_usb_phy_clkset(struct platform_device *pdev) -{ - struct clk *xusbxti_clk; - u32 phyclk; - - xusbxti_clk = clk_get(&pdev->dev, "xusbxti"); - if (xusbxti_clk && !IS_ERR(xusbxti_clk)) { - if (soc_is_exynos4210()) { - /* set clock frequency for PLL */ - phyclk = readl(EXYNOS4_PHYCLK) & ~EXYNOS4210_CLKSEL_MASK; - - switch (clk_get_rate(xusbxti_clk)) { - case 12 * MHZ: - phyclk |= EXYNOS4210_CLKSEL_12M; - break; - case 48 * MHZ: - phyclk |= EXYNOS4210_CLKSEL_48M; - break; - default: - case 24 * MHZ: - phyclk |= EXYNOS4210_CLKSEL_24M; - break; - } - writel(phyclk, EXYNOS4_PHYCLK); - } else if (soc_is_exynos4212() || soc_is_exynos4412()) { - /* set clock frequency for PLL */ - phyclk = readl(EXYNOS4_PHYCLK) & ~EXYNOS4X12_CLKSEL_MASK; - - switch (clk_get_rate(xusbxti_clk)) { - case 9600 * KHZ: - phyclk |= EXYNOS4X12_CLKSEL_9600K; - break; - case 10 * MHZ: - phyclk |= EXYNOS4X12_CLKSEL_10M; - break; - case 12 * MHZ: - phyclk |= EXYNOS4X12_CLKSEL_12M; - break; - case 19200 * KHZ: - phyclk |= EXYNOS4X12_CLKSEL_19200K; - break; - case 20 * MHZ: - phyclk |= EXYNOS4X12_CLKSEL_20M; - break; - default: - case 24 * MHZ: - /* default reference clock */ - phyclk |= EXYNOS4X12_CLKSEL_24M; - break; - } - writel(phyclk, EXYNOS4_PHYCLK); - } - clk_put(xusbxti_clk); - } -} - -static int exynos4210_usb_phy0_init(struct platform_device *pdev) -{ - u32 rstcon; - - writel(readl(S5P_USBDEVICE_PHY_CONTROL) | S5P_USBDEVICE_PHY_ENABLE, - S5P_USBDEVICE_PHY_CONTROL); - - exynos4210_usb_phy_clkset(pdev); - - /* set to normal PHY0 */ - writel((readl(EXYNOS4_PHYPWR) & ~PHY0_NORMAL_MASK), EXYNOS4_PHYPWR); - - /* reset PHY0 and Link */ - rstcon = readl(EXYNOS4_RSTCON) | PHY0_SWRST_MASK; - writel(rstcon, EXYNOS4_RSTCON); - udelay(10); - - rstcon &= ~PHY0_SWRST_MASK; - writel(rstcon, EXYNOS4_RSTCON); - - return 0; -} - -static int exynos4210_usb_phy0_exit(struct platform_device *pdev) -{ - writel((readl(EXYNOS4_PHYPWR) | PHY0_ANALOG_POWERDOWN | - PHY0_OTG_DISABLE), EXYNOS4_PHYPWR); - - writel(readl(S5P_USBDEVICE_PHY_CONTROL) & ~S5P_USBDEVICE_PHY_ENABLE, - S5P_USBDEVICE_PHY_CONTROL); - - return 0; -} - -static int exynos4210_usb_phy1_init(struct platform_device *pdev) -{ - struct clk *otg_clk; - u32 rstcon; - int err; - - atomic_inc(&host_usage); - - 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 (exynos4_usb_host_phy_is_on()) - return 0; - - writel(readl(S5P_USBHOST_PHY_CONTROL) | S5P_USBHOST_PHY_ENABLE, - S5P_USBHOST_PHY_CONTROL); - - exynos4210_usb_phy_clkset(pdev); - - /* floating prevention logic: disable */ - writel((readl(EXYNOS4_PHY1CON) | FPENABLEN), EXYNOS4_PHY1CON); - - /* set to normal HSIC 0 and 1 of PHY1 */ - writel((readl(EXYNOS4_PHYPWR) & ~PHY1_HSIC_NORMAL_MASK), - EXYNOS4_PHYPWR); - - /* set to normal standard USB of PHY1 */ - writel((readl(EXYNOS4_PHYPWR) & ~PHY1_STD_NORMAL_MASK), EXYNOS4_PHYPWR); - - /* reset all ports of both PHY and Link */ - rstcon = readl(EXYNOS4_RSTCON) | HOST_LINK_PORT_SWRST_MASK | - PHY1_SWRST_MASK; - writel(rstcon, EXYNOS4_RSTCON); - udelay(10); - - rstcon &= ~(HOST_LINK_PORT_SWRST_MASK | PHY1_SWRST_MASK); - writel(rstcon, EXYNOS4_RSTCON); - udelay(80); - - clk_disable(otg_clk); - clk_put(otg_clk); - - return 0; -} - -static int exynos4210_usb_phy1_exit(struct platform_device *pdev) -{ - struct clk *otg_clk; - int err; - - if (atomic_dec_return(&host_usage) > 0) - return 0; - - 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; - } - - writel((readl(EXYNOS4_PHYPWR) | PHY1_STD_ANALOG_POWERDOWN), - EXYNOS4_PHYPWR); - - writel(readl(S5P_USBHOST_PHY_CONTROL) & ~S5P_USBHOST_PHY_ENABLE, - S5P_USBHOST_PHY_CONTROL); - - clk_disable(otg_clk); - clk_put(otg_clk); - - return 0; -} - -int s5p_usb_phy_init(struct platform_device *pdev, int type) -{ - if (type == USB_PHY_TYPE_DEVICE) - return exynos4210_usb_phy0_init(pdev); - else if (type == USB_PHY_TYPE_HOST) - return exynos4210_usb_phy1_init(pdev); - - return -EINVAL; -} - -int s5p_usb_phy_exit(struct platform_device *pdev, int type) -{ - if (type == USB_PHY_TYPE_DEVICE) - return exynos4210_usb_phy0_exit(pdev); - else if (type == USB_PHY_TYPE_HOST) - return exynos4210_usb_phy1_exit(pdev); - - return -EINVAL; -} |