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1d45ac49 SN |
1 | /* |
2 | * Copyright (C) 2011 Samsung Electronics Co., Ltd. | |
3 | * | |
4 | * S5P - Helper functions for MIPI-CSIS and MIPI-DSIM D-PHY control | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
30da66ea | 11 | #include <linux/export.h> |
1d45ac49 SN |
12 | #include <linux/kernel.h> |
13 | #include <linux/platform_device.h> | |
14 | #include <linux/io.h> | |
15 | #include <linux/spinlock.h> | |
16 | #include <mach/regs-clock.h> | |
17 | ||
69a3d4f7 | 18 | static int __s5p_mipi_phy_control(int id, bool on, u32 reset) |
1d45ac49 SN |
19 | { |
20 | static DEFINE_SPINLOCK(lock); | |
21 | void __iomem *addr; | |
22 | unsigned long flags; | |
1d45ac49 SN |
23 | u32 cfg; |
24 | ||
69a3d4f7 SN |
25 | id = max(0, id); |
26 | if (id > 1) | |
1d45ac49 SN |
27 | return -EINVAL; |
28 | ||
69a3d4f7 | 29 | addr = S5P_MIPI_DPHY_CONTROL(id); |
1d45ac49 SN |
30 | |
31 | spin_lock_irqsave(&lock, flags); | |
32 | ||
33 | cfg = __raw_readl(addr); | |
34 | cfg = on ? (cfg | reset) : (cfg & ~reset); | |
35 | __raw_writel(cfg, addr); | |
36 | ||
37 | if (on) { | |
38 | cfg |= S5P_MIPI_DPHY_ENABLE; | |
39 | } else if (!(cfg & (S5P_MIPI_DPHY_SRESETN | | |
40 | S5P_MIPI_DPHY_MRESETN) & ~reset)) { | |
41 | cfg &= ~S5P_MIPI_DPHY_ENABLE; | |
42 | } | |
43 | ||
44 | __raw_writel(cfg, addr); | |
45 | spin_unlock_irqrestore(&lock, flags); | |
46 | ||
47 | return 0; | |
48 | } | |
49 | ||
69a3d4f7 | 50 | int s5p_csis_phy_enable(int id, bool on) |
1d45ac49 | 51 | { |
69a3d4f7 | 52 | return __s5p_mipi_phy_control(id, on, S5P_MIPI_DPHY_SRESETN); |
1d45ac49 | 53 | } |
30da66ea | 54 | EXPORT_SYMBOL(s5p_csis_phy_enable); |
1d45ac49 SN |
55 | |
56 | int s5p_dsim_phy_enable(struct platform_device *pdev, bool on) | |
57 | { | |
69a3d4f7 | 58 | return __s5p_mipi_phy_control(pdev->id, on, S5P_MIPI_DPHY_MRESETN); |
1d45ac49 | 59 | } |
30da66ea | 60 | EXPORT_SYMBOL(s5p_dsim_phy_enable); |