path: root/drivers/video/atmel_lcdfb.c

/*
 *  Driver for AT91/AT32 LCD Controller
 *
 *  Copyright (C) 2007 Atmel Corporation
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive for
 * more details.
 */

#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/clk.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/backlight.h>
#include <linux/gfp.h>
#include <linux/module.h>
#include <linux/platform_data/atmel.h>

#include <mach/cpu.h>
#include <asm/gpio.h>

#include <video/atmel_lcdc.h>

#define lcdc_readl(sinfo, reg)		__raw_readl((sinfo)->mmio+(reg))
#define lcdc_writel(sinfo, reg, val)	__raw_writel((val), (sinfo)->mmio+(reg))

/* configurable parameters */
#define ATMEL_LCDC_CVAL_DEFAULT		0xc8
#define ATMEL_LCDC_DMA_BURST_LEN	8	/* words */
#define ATMEL_LCDC_FIFO_SIZE		512	/* words */

struct atmel_lcdfb_config {
	bool have_alt_pixclock;
	bool have_hozval;
	bool have_intensity_bit;
};

static struct atmel_lcdfb_config at91sam9261_config = {
	.have_hozval		= true,
	.have_intensity_bit	= true,
};

static struct atmel_lcdfb_config at91sam9263_config = {
	.have_intensity_bit	= true,
};

static struct atmel_lcdfb_config at91sam9g10_config = {
	.have_hozval		= true,
};

static struct atmel_lcdfb_config at91sam9g45_config = {
	.have_alt_pixclock	= true,
};

static struct atmel_lcdfb_config at91sam9g45es_config = {
};

static struct atmel_lcdfb_config at91sam9rl_config = {
	.have_intensity_bit	= true,
};

static struct atmel_lcdfb_config at32ap_config = {
	.have_hozval		= true,
};

static const struct platform_device_id atmel_lcdfb_devtypes[] = {
	{
		.name = "at91sam9261-lcdfb",
		.driver_data = (unsigned long)&at91sam9261_config,
	}, {
		.name = "at91sam9263-lcdfb",
		.driver_data = (unsigned long)&at91sam9263_config,
	}, {
		.name = "at91sam9g10-lcdfb",
		.driver_data = (unsigned long)&at91sam9g10_config,
	}, {
		.name = "at91sam9g45-lcdfb",
		.driver_data = (unsigned long)&at91sam9g45_config,
	}, {
		.name = "at91sam9g45es-lcdfb",
		.driver_data = (unsigned long)&at91sam9g45es_config,
	}, {
		.name = "at91sam9rl-lcdfb",
		.driver_data = (unsigned long)&at91sam9rl_config,
	}, {
		.name = "at32ap-lcdfb",
		.driver_data = (unsigned long)&at32ap_config,
	}, {
		/* terminator */
	}
};

static struct atmel_lcdfb_config *
atmel_lcdfb_get_config(struct platform_device *pdev)
{
	unsigned long data;

	data = platform_get_device_id(pdev)->driver_data;

	return (struct atmel_lcdfb_config *)data;
}

#if defined(CONFIG_ARCH_AT91)
#define	ATMEL_LCDFB_FBINFO_DEFAULT	(FBINFO_DEFAULT \
					 | FBINFO_PARTIAL_PAN_OK \
					 | FBINFO_HWACCEL_YPAN)

static inline void atmel_lcdfb_update_dma2d(struct atmel_lcdfb_info *sinfo,
					struct fb_var_screeninfo *var,