[linux-2.6-block.git] / drivers / video / omap2 / displays / panel-sharp-ls037v7dw01.c

/*
 * LCD panel driver for Sharp LS037V7DW01
 *
 * Copyright (C) 2008 Nokia Corporation
 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
 *
 * 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.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */

#include <linux/module.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/backlight.h>
#include <linux/fb.h>
#include <linux/err.h>
#include <linux/slab.h>

#include <plat/display.h>

struct sharp_data {
	struct backlight_device *bl;
};

static struct omap_video_timings sharp_ls_timings = {
	.x_res = 480,
	.y_res = 640,

	.pixel_clock	= 19200,

	.hsw		= 2,
	.hfp		= 1,
	.hbp		= 28,

	.vsw		= 1,
	.vfp		= 1,
	.vbp		= 1,
};

static int sharp_ls_bl_update_status(struct backlight_device *bl)
{
	struct omap_dss_device *dssdev = dev_get_drvdata(&bl->dev);
	int level;

	if (!dssdev->set_backlight)
		return -EINVAL;

	if (bl->props.fb_blank == FB_BLANK_UNBLANK &&
			bl->props.power == FB_BLANK_UNBLANK)
		level = bl->props.brightness;
	else
		level = 0;

	return dssdev->set_backlight(dssdev, level);
}

static int sharp_ls_bl_get_brightness(struct backlight_device *bl)
{
	if (bl->props.fb_blank == FB_BLANK_UNBLANK &&
			bl->props.power == FB_BLANK_UNBLANK)
		return bl->props.brightness;

	return 0;
}

static const struct backlight_ops sharp_ls_bl_ops = {
	.get_brightness = sharp_ls_bl_get_brightness,
	.update_status  = sharp_ls_bl_update_status,
};


static int sharp_ls_panel_probe(struct omap_dss_device *dssdev)
{
	struct backlight_properties props;
	struct backlight_device *bl;
	struct sharp_data *sd;
	int r;

	dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
		OMAP_DSS_LCD_IHS;
	dssdev->panel.acb = 0x28;
	dssdev->panel.timings = sharp_ls_timings;

	sd = kzalloc(sizeof(*sd), GFP_KERNEL);
	if (!sd)
		return -ENOMEM;

	dev_set_drvdata(&dssdev->dev, sd);

	memset(&props, 0, sizeof(struct backlight_properties));
	props.max_brightness = dssdev->max_backlight_level;

	bl = backlight_device_register("sharp-ls", &dssdev->dev, dssdev,
			&sharp_ls_bl_ops, &props);
	if (IS_ERR(bl)) {
		r = PTR_ERR(bl);
		kfree(sd);
		return r;
	}
	sd->bl = bl;

	bl->props.fb_blank = FB_BLANK_UNBLANK;
	bl->props.power = FB_BLANK_UNBLANK;
	bl->props.brightness = dssdev->max_backlight_level;
	r = sharp_ls_bl_update_status(bl);
	if (r < 0)
		dev_err(&dssdev->dev, "failed to set lcd brightness\n");

	return 0;
}

static void sharp_ls_panel_remove(struct omap_dss_device *dssdev)
{
	struct sharp_data *sd = dev_get_drvdata(&dssdev->dev);
	struct backlight_device *bl = sd->bl;

	bl->props.power = FB_BLANK_POWERDOWN;
	sharp_ls_bl_update_status(bl);
	backlight_device_unregister(bl);

	kfree(sd);
}

static int sharp_ls_power_on(struct omap_dss_device *dssdev)
{
	int r = 0;

	if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
		return 0;

	r = omapdss_dpi_display_enable(dssdev);
	if (r)
		goto err0;

	/* wait couple of vsyncs until enabling the LCD */
	msleep(50);

	if (dssdev->platform_enable) {
		r = dssdev->platform_enable(dssdev);
		if (r)
			goto err1;
	}

	return 0;
err1:
	omapdss_dpi_display_disable(dssdev);
err0:
	return r;
}

static void sharp_ls_power_off(struct omap_dss_device *dssdev)
{
	if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
		return;

	if (dssdev->platform_disable)
		dssdev->platform_disable(dssdev);

	/* wait at least 5 vsyncs after disabling the LCD */

	msleep(100);

	omapdss_dpi_display_disable(dssdev);
}

static int sharp_ls_panel_enable(struct omap_dss_device *dssdev)
{
	int r;
	r = sharp_ls_power_on(dssdev);
	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
	return r;
}

static void sharp_ls_panel_disable(struct omap_dss_device *dssdev)
{
	sharp_ls_power_off(dssdev);
	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
}

static int sharp_ls_panel_suspend(struct omap_dss_device *dssdev)
{
	sharp_ls_power_off(dssdev);
	dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
	return 0;
}

static int sharp_ls_panel_resume(struct omap_dss_device *dssdev)
{
	int r;
	r = sharp_ls_power_on(dssdev);
	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
	return r;
}

static struct omap_dss_driver sharp_ls_driver = {
	.probe		= sharp_ls_panel_probe,
	.remove		= sharp_ls_panel_remove,

	.enable		= sharp_ls_panel_enable,
	.disable	= sharp_ls_panel_disable,
	.suspend	= sharp_ls_panel_suspend,
	.resume		= sharp_ls_panel_resume,

	.driver         = {
		.name   = "sharp_ls_panel",
		.owner  = THIS_MODULE,
	},
};

static int __init sharp_ls_panel_drv_init(void)
{
	return omap_dss_register_driver(&sharp_ls_driver);
}

static void __exit sharp_ls_panel_drv_exit(void)
{
	omap_dss_unregister_driver(&sharp_ls_driver);
}

module_init(sharp_ls_panel_drv_init);
module_exit(sharp_ls_panel_drv_exit);
MODULE_LICENSE("GPL");
Commit	Line	Data
3b8f29b4 TV	1	/*
	2	* LCD panel driver for Sharp LS037V7DW01
	3	*
	4	* Copyright (C) 2008 Nokia Corporation
	5	* Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License version 2 as published by
	9	* the Free Software Foundation.
	10	*
	11	* This program is distributed in the hope that it will be useful, but WITHOUT
	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	14	* more details.
	15	*
	16	* You should have received a copy of the GNU General Public License along with
	17	* this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
	20	#include <linux/module.h>
	21	#include <linux/delay.h>
	22	#include <linux/device.h>
2b88c5bc VH	23	#include <linux/backlight.h>
2b88c5bc VH	24	#include <linux/fb.h>
3b8f29b4	25	#include <linux/err.h>
2b88c5bc	26	#include <linux/slab.h>
3b8f29b4 TV	27
	28	#include <plat/display.h>
	29
2b88c5bc VH	30	struct sharp_data {
	31	struct backlight_device *bl;
	32	};
	33
3b8f29b4 TV	34	static struct omap_video_timings sharp_ls_timings = {
	35	.x_res = 480,
	36	.y_res = 640,
	37
	38	.pixel_clock = 19200,
	39
	40	.hsw = 2,
	41	.hfp = 1,
	42	.hbp = 28,
	43
	44	.vsw = 1,
	45	.vfp = 1,
	46	.vbp = 1,
	47	};
	48
2b88c5bc VH	49	static int sharp_ls_bl_update_status(struct backlight_device *bl)
	50	{
	51	struct omap_dss_device *dssdev = dev_get_drvdata(&bl->dev);
	52	int level;
	53
	54	if (!dssdev->set_backlight)
	55	return -EINVAL;
	56
	57	if (bl->props.fb_blank == FB_BLANK_UNBLANK &&
	58	bl->props.power == FB_BLANK_UNBLANK)
	59	level = bl->props.brightness;
	60	else
	61	level = 0;
	62
	63	return dssdev->set_backlight(dssdev, level);
	64	}
	65
	66	static int sharp_ls_bl_get_brightness(struct backlight_device *bl)
	67	{
	68	if (bl->props.fb_blank == FB_BLANK_UNBLANK &&
	69	bl->props.power == FB_BLANK_UNBLANK)
	70	return bl->props.brightness;
	71
	72	return 0;
	73	}
	74
	75	static const struct backlight_ops sharp_ls_bl_ops = {
	76	.get_brightness = sharp_ls_bl_get_brightness,
	77	.update_status = sharp_ls_bl_update_status,
	78	};
	79
	80
	81
3b8f29b4 TV	82	static int sharp_ls_panel_probe(struct omap_dss_device *dssdev)
3b8f29b4 TV	83	{
2b88c5bc VH	84	struct backlight_properties props;
	85	struct backlight_device *bl;
	86	struct sharp_data *sd;
	87	int r;
	88
3b8f29b4 TV	89	dssdev->panel.config = OMAP_DSS_LCD_TFT \| OMAP_DSS_LCD_IVS \|
	90	OMAP_DSS_LCD_IHS;
	91	dssdev->panel.acb = 0x28;
	92	dssdev->panel.timings = sharp_ls_timings;
	93
2b88c5bc VH	94	sd = kzalloc(sizeof(*sd), GFP_KERNEL);
	95	if (!sd)
	96	return -ENOMEM;
	97
	98	dev_set_drvdata(&dssdev->dev, sd);
	99
	100	memset(&props, 0, sizeof(struct backlight_properties));
	101	props.max_brightness = dssdev->max_backlight_level;
	102
	103	bl = backlight_device_register("sharp-ls", &dssdev->dev, dssdev,
	104	&sharp_ls_bl_ops, &props);
	105	if (IS_ERR(bl)) {
	106	r = PTR_ERR(bl);
	107	kfree(sd);
	108	return r;
	109	}
	110	sd->bl = bl;
	111
	112	bl->props.fb_blank = FB_BLANK_UNBLANK;
	113	bl->props.power = FB_BLANK_UNBLANK;
	114	bl->props.brightness = dssdev->max_backlight_level;
	115	r = sharp_ls_bl_update_status(bl);
	116	if (r < 0)
	117	dev_err(&dssdev->dev, "failed to set lcd brightness\n");
	118
3b8f29b4 TV	119	return 0;
	120	}
	121
	122	static void sharp_ls_panel_remove(struct omap_dss_device *dssdev)
	123	{
2b88c5bc VH	124	struct sharp_data *sd = dev_get_drvdata(&dssdev->dev);
	125	struct backlight_device *bl = sd->bl;
	126
	127	bl->props.power = FB_BLANK_POWERDOWN;
	128	sharp_ls_bl_update_status(bl);
	129	backlight_device_unregister(bl);
	130
	131	kfree(sd);
3b8f29b4 TV	132	}
3b8f29b4 TV	133
37ac60e4	134	static int sharp_ls_power_on(struct omap_dss_device *dssdev)
3b8f29b4	135	{
3b8f29b4 TV	136	int r = 0;
3b8f29b4 TV	137
18016e35 SM	138	if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
	139	return 0;
	140
37ac60e4 TV	141	r = omapdss_dpi_display_enable(dssdev);
	142	if (r)
	143	goto err0;
	144
3b8f29b4 TV	145	/* wait couple of vsyncs until enabling the LCD */
	146	msleep(50);
	147
37ac60e4	148	if (dssdev->platform_enable) {
3b8f29b4	149	r = dssdev->platform_enable(dssdev);
37ac60e4 TV	150	if (r)
	151	goto err1;
	152	}
3b8f29b4	153
37ac60e4 TV	154	return 0;
	155	err1:
	156	omapdss_dpi_display_disable(dssdev);
	157	err0:
3b8f29b4 TV	158	return r;
	159	}
	160
37ac60e4	161	static void sharp_ls_power_off(struct omap_dss_device *dssdev)
3b8f29b4	162	{
18016e35 SM	163	if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
	164	return;
	165
3b8f29b4 TV	166	if (dssdev->platform_disable)
	167	dssdev->platform_disable(dssdev);
	168
3b8f29b4 TV	169	/* wait at least 5 vsyncs after disabling the LCD */
	170
	171	msleep(100);
37ac60e4 TV	172
	173	omapdss_dpi_display_disable(dssdev);
	174	}
	175
	176	static int sharp_ls_panel_enable(struct omap_dss_device *dssdev)
	177	{
	178	int r;
	179	r = sharp_ls_power_on(dssdev);
	180	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
	181	return r;
	182	}
	183
	184	static void sharp_ls_panel_disable(struct omap_dss_device *dssdev)
	185	{
	186	sharp_ls_power_off(dssdev);
	187	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
3b8f29b4 TV	188	}
	189
	190	static int sharp_ls_panel_suspend(struct omap_dss_device *dssdev)
	191	{
37ac60e4 TV	192	sharp_ls_power_off(dssdev);
37ac60e4 TV	193	dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
3b8f29b4 TV	194	return 0;
	195	}
	196
	197	static int sharp_ls_panel_resume(struct omap_dss_device *dssdev)
	198	{
37ac60e4 TV	199	int r;
	200	r = sharp_ls_power_on(dssdev);
	201	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
	202	return r;
3b8f29b4 TV	203	}
	204
	205	static struct omap_dss_driver sharp_ls_driver = {
	206	.probe = sharp_ls_panel_probe,
	207	.remove = sharp_ls_panel_remove,
	208
	209	.enable = sharp_ls_panel_enable,
	210	.disable = sharp_ls_panel_disable,
	211	.suspend = sharp_ls_panel_suspend,
	212	.resume = sharp_ls_panel_resume,
	213
	214	.driver = {
	215	.name = "sharp_ls_panel",
	216	.owner = THIS_MODULE,
	217	},
	218	};
	219
	220	static int __init sharp_ls_panel_drv_init(void)
	221	{
	222	return omap_dss_register_driver(&sharp_ls_driver);
	223	}
	224
	225	static void __exit sharp_ls_panel_drv_exit(void)
	226	{
	227	omap_dss_unregister_driver(&sharp_ls_driver);
	228	}
	229
	230	module_init(sharp_ls_panel_drv_init);
	231	module_exit(sharp_ls_panel_drv_exit);
	232	MODULE_LICENSE("GPL");