HID: picolcd: sanity check report size in raw_event() callback
[firefly-linux-kernel-4.4.55.git] / arch / arm / mach-s5pv210 / setup-usb-phy.c
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
16 #include <mach/map.h>
17
18 #include <plat/cpu.h>
19 #include <plat/regs-usb-hsotg-phy.h>
20 #include <plat/usb-phy.h>
21
22 #define S5PV210_USB_PHY_CON     (S3C_VA_SYS + 0xE80C)
23 #define S5PV210_USB_PHY0_EN     (1 << 0)
24 #define S5PV210_USB_PHY1_EN     (1 << 1)
25
26 static int s5pv210_usb_otgphy_init(struct platform_device *pdev)
27 {
28         struct clk *xusbxti;
29         u32 phyclk;
30
31         writel(readl(S5PV210_USB_PHY_CON) | S5PV210_USB_PHY0_EN,
32                         S5PV210_USB_PHY_CON);
33
34         /* set clock frequency for PLL */
35         phyclk = readl(S3C_PHYCLK) & ~S3C_PHYCLK_CLKSEL_MASK;
36
37         xusbxti = clk_get(&pdev->dev, "xusbxti");
38         if (xusbxti && !IS_ERR(xusbxti)) {
39                 switch (clk_get_rate(xusbxti)) {
40                 case 12 * MHZ:
41                         phyclk |= S3C_PHYCLK_CLKSEL_12M;
42                         break;
43                 case 24 * MHZ:
44                         phyclk |= S3C_PHYCLK_CLKSEL_24M;
45                         break;
46                 default:
47                 case 48 * MHZ:
48                         /* default reference clock */
49                         break;
50                 }
51                 clk_put(xusbxti);
52         }
53
54         /* TODO: select external clock/oscillator */
55         writel(phyclk | S3C_PHYCLK_CLK_FORCE, S3C_PHYCLK);
56
57         /* set to normal OTG PHY */
58         writel((readl(S3C_PHYPWR) & ~S3C_PHYPWR_NORMAL_MASK), S3C_PHYPWR);
59         mdelay(1);
60
61         /* reset OTG PHY and Link */
62         writel(S3C_RSTCON_PHY | S3C_RSTCON_HCLK | S3C_RSTCON_PHYCLK,
63                         S3C_RSTCON);
64         udelay(20);     /* at-least 10uS */
65         writel(0, S3C_RSTCON);
66
67         return 0;
68 }
69
70 static int s5pv210_usb_otgphy_exit(struct platform_device *pdev)
71 {
72         writel((readl(S3C_PHYPWR) | S3C_PHYPWR_ANALOG_POWERDOWN |
73                                 S3C_PHYPWR_OTG_DISABLE), S3C_PHYPWR);
74
75         writel(readl(S5PV210_USB_PHY_CON) & ~S5PV210_USB_PHY0_EN,
76                         S5PV210_USB_PHY_CON);
77
78         return 0;
79 }
80
81 int s5p_usb_phy_init(struct platform_device *pdev, int type)
82 {
83         if (type == USB_PHY_TYPE_DEVICE)
84                 return s5pv210_usb_otgphy_init(pdev);
85
86         return -EINVAL;
87 }
88
89 int s5p_usb_phy_exit(struct platform_device *pdev, int type)
90 {
91         if (type == USB_PHY_TYPE_DEVICE)
92                 return s5pv210_usb_otgphy_exit(pdev);
93
94         return -EINVAL;
95 }