path: root/drivers/video/omap/hwa742.c

/*
 * Epson HWA742 LCD controller driver
 *
 * Copyright (C) 2004-2005 Nokia Corporation
 * Authors:     Juha Yrjölä   <juha.yrjola@nokia.com>
 *	        Imre Deak     <imre.deak@nokia.com>
 * YUV support: Jussi Laako   <jussi.laako@nokia.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/fb.h>
#include <linux/delay.h>
#include <linux/clk.h>

#include <mach/dma.h>
#include <mach/omapfb.h>
#include <mach/hwa742.h>

#define HWA742_REV_CODE_REG       0x0
#define HWA742_CONFIG_REG         0x2
#define HWA742_PLL_DIV_REG        0x4
#define HWA742_PLL_0_REG          0x6
#define HWA742_PLL_1_REG          0x8
#define HWA742_PLL_2_REG          0xa
#define HWA742_PLL_3_REG          0xc
#define HWA742_PLL_4_REG          0xe
#define HWA742_CLK_SRC_REG        0x12
#define HWA742_PANEL_TYPE_REG     0x14
#define HWA742_H_DISP_REG         0x16
#define HWA742_H_NDP_REG          0x18
#define HWA742_V_DISP_1_REG       0x1a
#define HWA742_V_DISP_2_REG       0x1c
#define HWA742_V_NDP_REG          0x1e
#define HWA742_HS_W_REG           0x20
#define HWA742_HP_S_REG           0x22
#define HWA742_VS_W_REG           0x24
#define HWA742_VP_S_REG           0x26
#define HWA742_PCLK_POL_REG       0x28
#define HWA742_INPUT_MODE_REG     0x2a
#define HWA742_TRANSL_MODE_REG1   0x2e
#define HWA742_DISP_MODE_REG      0x34
#define HWA742_WINDOW_TYPE        0x36
#define HWA742_WINDOW_X_START_0   0x38
#define HWA742_WINDOW_X_START_1   0x3a
#define HWA742_WINDOW_Y_START_0   0x3c
#define HWA742_WINDOW_Y_START_1   0x3e
#define HWA742_WINDOW_X_END_0     0x40
#define HWA742_WINDOW_X_END_1     0x42
#define HWA742_WINDOW_Y_END_0     0x44
#define HWA742_WINDOW_Y_END_1     0x46
#define HWA742_MEMORY_WRITE_LSB   0x48
#define HWA742_MEMORY_WRITE_MSB   0x49
#define HWA742_MEMORY_READ_0      0x4a
#define HWA742_MEMORY_READ_1      0x4c
#define HWA742_MEMORY_READ_2      0x4e
#define HWA742_POWER_SAVE         0x56
#define HWA742_NDP_CTRL           0x58

#define HWA742_AUTO_UPDATE_TIME		(HZ / 20)

/* Reserve 4 request slots for requests in irq context */
#define REQ_POOL_SIZE			24
#define IRQ_REQ_POOL_SIZE		4

#define REQ_FROM_IRQ_POOL 0x01

#define REQ_COMPLETE	0
#define REQ_PENDING	1

struct update_param {
	int	x, y, width, height;
	int	color_mode;
	int	flags;
};

struct hwa742_request {
	struct list_head entry;
	unsigned int	 flags;

	int		 (*handler)(struct hwa742_request *req);
	void		 (*complete)(void *data);
	void		 *complete_data;

	union {
		struct update_param	update;
		struct completion	*sync;
	} par;
};

struct {
	enum omapfb_update_mode	update_mode;
	enum omapfb_update_mode	update_mode_before_suspend;

	struct timer_list	auto_update_timer;
	int			stop_auto_update;
	struct omapfb_update_window	auto_update_window;
	unsigned		te_connected:1;
	unsigned		vsync_only:1;

	struct hwa742_request	req_pool[REQ_POOL_SIZE];
	struct list_head	pending_req_list;
	struct list_head	free_req_list;
	struct semaphore	req_sema;
	spinlock_t		req_lock;

	struct extif_timings	reg_timings, lut_timings;

	int			prev_color_mode;
	int			prev_flags;
	int			window_type;

	u32			max_transmit_size;
	u32			extif_clk_period;
	unsigned long		pix_tx_time;
	unsigned long		line_upd_time;


	struct omapfb_device	*fbdev;
	struct lcd_ctrl_extif	*extif;
	const struct lcd_ctrl	*int_ctrl;

	struct clk		*sys_ck;
} hwa742;

struct lcd_ctrl hwa742_ctrl;

static u8 hwa742_read_reg(u8 reg)
{
	u8 data;

	hwa742.extif->set_bits_per_cycle(8);
	hwa742.extif->write_command(&reg, 1);
	hwa742.extif->read_data(&data, 1);

	return data;
}

static void hwa742_write_reg(u8 reg, u8 data)
{
	hwa742.extif->set_bits_per_cycle(8);
	hwa742.extif->write_command(&reg, 1);
	hwa742.extif->write_data(&data, 1);
}

static void set_window_regs(int x_start, int y_start, int x_end, int y_end)
{
	u8 tmp[8];
	u8 cmd;

	x_end--;
	y_end--;
	tmp[0] = x_start;
	tmp[1] = x_start >> 8;
	tmp[2] = y_start;
	tmp[3] = y_start >> 8;
	tmp[4] = x_end;
	tmp[5] = x_end >> 8;
	tmp[6] = y_end;
	tmp[7] = y_end >> 8;

	hwa742.extif->set_bits_per_cycle(8);
	cmd = HWA742_WINDOW_X_START_0;

	hwa742.extif->write_command(&cmd, 1);

	hwa742.extif->write_data(tmp,