linux/arch/arm/plat-s5p/setup-mipiphy.c
Sylwester Nawrocki 1d45ac49da ARM: S5P: Add support for common MIPI CSIS/DSIM D-PHY control
Add common code for MIPI-CSIS and MIPI-DSIM drivers to support
their corresponding D-PHY's enable and reset control.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-03-11 15:49:01 +09:00

64 lines
1.4 KiB
C

/*
* Copyright (C) 2011 Samsung Electronics Co., Ltd.
*
* S5P - Helper functions for MIPI-CSIS and MIPI-DSIM D-PHY control
*
* 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 Foundation.
*/
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/spinlock.h>
#include <mach/regs-clock.h>
static int __s5p_mipi_phy_control(struct platform_device *pdev,
bool on, u32 reset)
{
static DEFINE_SPINLOCK(lock);
void __iomem *addr;
unsigned long flags;
int pid;
u32 cfg;
if (!pdev)
return -EINVAL;
pid = (pdev->id == -1) ? 0 : pdev->id;
if (pid != 0 && pid != 1)
return -EINVAL;
addr = S5P_MIPI_DPHY_CONTROL(pid);
spin_lock_irqsave(&lock, flags);
cfg = __raw_readl(addr);
cfg = on ? (cfg | reset) : (cfg & ~reset);
__raw_writel(cfg, addr);
if (on) {
cfg |= S5P_MIPI_DPHY_ENABLE;
} else if (!(cfg & (S5P_MIPI_DPHY_SRESETN |
S5P_MIPI_DPHY_MRESETN) & ~reset)) {
cfg &= ~S5P_MIPI_DPHY_ENABLE;
}
__raw_writel(cfg, addr);
spin_unlock_irqrestore(&lock, flags);
return 0;
}
int s5p_csis_phy_enable(struct platform_device *pdev, bool on)
{
return __s5p_mipi_phy_control(pdev, on, S5P_MIPI_DPHY_SRESETN);
}
int s5p_dsim_phy_enable(struct platform_device *pdev, bool on)
{
return __s5p_mipi_phy_control(pdev, on, S5P_MIPI_DPHY_MRESETN);
}