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/* linux/arch/arm/mach-exynos/setup-dsim.c
*
* Copyright (c) 2010 Samsung Electronics Co., Ltd.
* http://www.samsung.com/
*
* DSIM controller configuration
*
* 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/string.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/gpio.h>
#include <plat/clock.h>
#include <plat/regs-dsim.h>
#include <plat/gpio-cfg.h>
#include <mach/map.h>
#include <mach/regs-pmu.h>
#define S5P_MIPI_M_RESETN 4
static void s5p_dsim_enable_d_phy(unsigned char enable)
{
unsigned int reg;
reg = readl(S5P_MIPI_DPHY_CONTROL(0));
if (enable)
reg |= S5P_MIPI_DPHY_ENABLE;
else if (!(reg & S5P_MIPI_DPHY_SRESETN))
reg &= ~S5P_MIPI_DPHY_ENABLE;
writel(reg, S5P_MIPI_DPHY_CONTROL(0));
}
static void s5p_dsim_enable_dsi_master(unsigned char enable)
{
unsigned int reg;
reg = (readl(S5P_MIPI_DPHY_CONTROL(0))) & ~(1 << 2);
reg |= (enable << 2);
writel(reg, S5P_MIPI_DPHY_CONTROL(0));
}
void s5p_dsim_enable_clk(void *d_clk, unsigned char enable)
{
int ret = 0;
struct clk *dsim_clk = (struct clk *) d_clk;
if (enable) {
ret = clk_enable(dsim_clk);
if (ret < 0)
printk("failed to clk_enable of dsim\n");
} else
clk_disable(dsim_clk);
}
void s5p_dsim_part_reset(void)
{
writel(S5P_MIPI_M_RESETN, S5P_MIPI_DPHY_CONTROL(0));
}
void s5p_dsim_init_d_phy(unsigned int dsim_base)
{
/* enable D-PHY */
s5p_dsim_enable_d_phy(1);
/* enable DSI master block */
s5p_dsim_enable_dsi_master(1);
}
void s5p_dsim_exit_d_phy(unsigned int dsim_base)
{
/* enable DSI master block */
s5p_dsim_enable_dsi_master(0);
/* enable D-PHY */
s5p_dsim_enable_d_phy(0);
}
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