projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 7f471ee8 JS |
1 | /* |
| 2 | * Copyright (C) 2012 Samsung Electronics Co.Ltd | |
| 3 | * Author: Joonyoung Shim <jy0922.shim@samsung.com> | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or modify | |
| 6 | * it under the terms of the GNU General Public License version 2 as | |
| 7 | * published by the Free Software Foundationr | |
| 8 | */ | |
| 9 | ||
| 10 | #include <linux/clk.h> | |
| 11 | #include <linux/delay.h> | |
| 12 | #include <linux/err.h> | |
| 13 | #include <linux/io.h> | |
| 14 | #include <linux/platform_device.h> | |
| 15 | #include <mach/map.h> | |
| 16 | #include <mach/regs-sys.h> | |
| 17 | #include <plat/cpu.h> | |
| 18 | #include <plat/regs-usb-hsotg-phy.h> | |
| 19 | #include <plat/usb-phy.h> | |
| 20 | ||
| 21 | static int s5pv210_usb_otgphy_init(struct platform_device *pdev) | |
| 22 | { | |
| 23 | struct clk *xusbxti; | |
| 24 | u32 phyclk; | |
| 25 | ||
| 26 | writel(readl(S5PV210_USB_PHY_CON) | S5PV210_USB_PHY0_EN, | |
| 27 | S5PV210_USB_PHY_CON); | |
| 28 | ||
| 29 | /* set clock frequency for PLL */ | |
| 30 | phyclk = readl(S3C_PHYCLK) & ~S3C_PHYCLK_CLKSEL_MASK; | |
| 31 | ||
| 32 | xusbxti = clk_get(&pdev->dev, "xusbxti"); | |
| 33 | if (xusbxti && !IS_ERR(xusbxti)) { | |
| 34 | switch (clk_get_rate(xusbxti)) { | |
| 35 | case 12 * MHZ: | |
| 36 | phyclk |= S3C_PHYCLK_CLKSEL_12M; | |
| 37 | break; | |
| 38 | case 24 * MHZ: | |
| 39 | phyclk |= S3C_PHYCLK_CLKSEL_24M; | |
| 40 | break; | |
| 41 | default: | |
| 42 | case 48 * MHZ: | |
| 43 | /* default reference clock */ | |
| 44 | break; | |
| 45 | } | |
| 46 | clk_put(xusbxti); | |
| 47 | } | |
| 48 | ||
| 49 | /* TODO: select external clock/oscillator */ | |
| 50 | writel(phyclk | S3C_PHYCLK_CLK_FORCE, S3C_PHYCLK); | |
| 51 | ||
| 52 | /* set to normal OTG PHY */ | |
| 53 | writel((readl(S3C_PHYPWR) & ~S3C_PHYPWR_NORMAL_MASK), S3C_PHYPWR); | |
| 54 | mdelay(1); | |
| 55 | ||
| 56 | /* reset OTG PHY and Link */ | |
| 57 | writel(S3C_RSTCON_PHY | S3C_RSTCON_HCLK | S3C_RSTCON_PHYCLK, | |
| 58 | S3C_RSTCON); | |
| 59 | udelay(20); /* at-least 10uS */ | |
| 60 | writel(0, S3C_RSTCON); | |
| 61 | ||
| 62 | return 0; | |
| 63 | } | |
| 64 | ||
| 65 | static int s5pv210_usb_otgphy_exit(struct platform_device *pdev) | |
| 66 | { | |
| 67 | writel((readl(S3C_PHYPWR) | S3C_PHYPWR_ANALOG_POWERDOWN | | |
| 68 | S3C_PHYPWR_OTG_DISABLE), S3C_PHYPWR); | |
| 69 | ||
| 70 | writel(readl(S5PV210_USB_PHY_CON) & ~S5PV210_USB_PHY0_EN, | |
| 71 | S5PV210_USB_PHY_CON); | |
| 72 | ||
| 73 | return 0; | |
| 74 | } | |
| 75 | ||
| 76 | int s5p_usb_phy_init(struct platform_device *pdev, int type) | |
| 77 | { | |
| 78 | if (type == S5P_USB_PHY_DEVICE) | |
| 79 | return s5pv210_usb_otgphy_init(pdev); | |
| 80 | ||
| 81 | return -EINVAL; | |
| 82 | } | |
| 83 | ||
| 84 | int s5p_usb_phy_exit(struct platform_device *pdev, int type) | |
| 85 | { | |
| 86 | if (type == S5P_USB_PHY_DEVICE) | |
| 87 | return s5pv210_usb_otgphy_exit(pdev); | |
| 88 | ||
| 89 | return -EINVAL; | |
| 90 | } |