[linux-2.6-block.git] / drivers / gpu / drm / omapdrm / displays / panel-sharp-ls037v7dw01.c

/*
 * LCD panel driver for Sharp LS037V7DW01
 *
 * Copyright (C) 2013 Texas Instruments
 * Author: Tomi Valkeinen <tomi.valkeinen@ti.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.
 */

#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/regulator/consumer.h>
#include <video/omapdss.h>

struct panel_drv_data {
	struct omap_dss_device dssdev;
	struct omap_dss_device *in;
	struct regulator *vcc;

	int data_lines;

	struct omap_video_timings videomode;

	struct gpio_desc *resb_gpio;	/* low = reset active min 20 us */
	struct gpio_desc *ini_gpio;	/* high = power on */
	struct gpio_desc *mo_gpio;	/* low = 480x640, high = 240x320 */
	struct gpio_desc *lr_gpio;	/* high = conventional horizontal scanning */
	struct gpio_desc *ud_gpio;	/* high = conventional vertical scanning */
};

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

	.pixelclock	= 19200000,

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

	.vsw		= 1,
	.vfp		= 1,
	.vbp		= 1,

	.vsync_level	= OMAPDSS_SIG_ACTIVE_LOW,
	.hsync_level	= OMAPDSS_SIG_ACTIVE_LOW,
	.data_pclk_edge	= OMAPDSS_DRIVE_SIG_RISING_EDGE,
	.de_level	= OMAPDSS_SIG_ACTIVE_HIGH,
	.sync_pclk_edge	= OMAPDSS_DRIVE_SIG_FALLING_EDGE,
};

#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)

static int sharp_ls_connect(struct omap_dss_device *dssdev)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;
	int r;

	if (omapdss_device_is_connected(dssdev))
		return 0;

	r = in->ops.dpi->connect(in, dssdev);
	if (r)
		return r;

	return 0;
}

static void sharp_ls_disconnect(struct omap_dss_device *dssdev)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	if (!omapdss_device_is_connected(dssdev))
		return;

	in->ops.dpi->disconnect(in, dssdev);
}

static int sharp_ls_enable(struct omap_dss_device *dssdev)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;
	int r;

	if (!omapdss_device_is_connected(dssdev))
		return -ENODEV;

	if (omapdss_device_is_enabled(dssdev))
		return 0;

	if (ddata->data_lines)
		in->ops.dpi->set_data_lines(in, ddata->data_lines);
	in->ops.dpi->set_timings(in, &ddata->videomode);

	if (ddata->vcc) {
		r = regulator_enable(ddata->vcc);
		if (r != 0)
			return r;
	}

	r = in->ops.dpi->enable(in);
	if (r) {
		regulator_disable(ddata->vcc);
		return r;
	}

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

	if (ddata->resb_gpio)
		gpiod_set_value_cansleep(ddata->resb_gpio, 1);

	if (ddata->ini_gpio)
		gpiod_set_value_cansleep(ddata->ini_gpio, 1);

	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;

	return 0;
}

static void sharp_ls_disable(struct omap_dss_device *dssdev)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	if (!omapdss_device_is_enabled(dssdev))
		return;

	if (ddata->ini_gpio)
		gpiod_set_value_cansleep(ddata->ini_gpio, 0);

	if (ddata->resb_gpio)
		gpiod_set_value_cansleep(ddata->resb_gpio, 0);

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

	msleep(100);

	in->ops.dpi->disable(in);

	if (ddata->vcc)
		regulator_disable(ddata->vcc);

	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
}

static void sharp_ls_set_timings(struct omap_dss_device *dssdev,
		struct omap_video_timings *timings)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	ddata->videomode = *timings;
	dssdev->panel.timings = *timings;

	in->ops.dpi->set_timings(in, timings);
}

static void sharp_ls_get_timings(struct omap_dss_device *dssdev,
		struct omap_video_timings *timings)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);

	*timings = ddata->videomode;
}

static int sharp_ls_check_timings(struct omap_dss_device *dssdev,
		struct omap_video_timings *timings)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	return in->ops.dpi->check_timings(in, timings);
}

static struct omap_dss_driver sharp_ls_ops = {
	.connect	= sharp_ls_connect,
	.disconnect	= sharp_ls_disconnect,

	.enable		= sharp_ls_enable,
	.disable	= sharp_ls_disable,

	.set_timings	= sharp_ls_set_timings,
	.get_timings	= sharp_ls_get_timings,
	.check_timings	= sharp_ls_check_timings,

	.get_resolution	= omapdss_default_get_resolution,
};

static  int sharp_ls_get_gpio_of(struct device *dev, int index, int val,
	const char *desc, struct gpio_desc **gpiod)
{
	struct gpio_desc *gd;

	*gpiod = NULL;

	gd = devm_gpiod_get_index(dev, desc, index, GPIOD_OUT_LOW);
	if (IS_ERR(gd))
		return PTR_ERR(gd);

	*gpiod = gd;
	return 0;
}

static int sharp_ls_probe_of(struct platform_device *pdev)
{
	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
	struct device_node *node = pdev->dev.of_node;
	struct omap_dss_device *in;
	int r;

	ddata->vcc = devm_regulator_get(&pdev->dev, "envdd");
	if (IS_ERR(ddata->vcc)) {
		dev_err(&pdev->dev, "failed to get regulator\n");
		return PTR_ERR(ddata->vcc);
	}

	/* lcd INI */
	r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "enable", &ddata->ini_gpio);
	if (r)
		return r;

	/* lcd RESB */
	r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "reset", &ddata->resb_gpio);
	if (r)
		return r;

	/* lcd MO */
	r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "mode", &ddata->mo_gpio);
	if (r)
		return r;

	/* lcd LR */
	r = sharp_ls_get_gpio_of(&pdev->dev, 1, 1, "mode", &ddata->lr_gpio);
	if (r)
		return r;

	/* lcd UD */
	r = sharp_ls_get_gpio_of(&pdev->dev, 2, 1, "mode", &ddata->ud_gpio);
	if (r)
		return r;

	in = omapdss_of_find_source_for_first_ep(node);
	if (IS_ERR(in)) {
		dev_err(&pdev->dev, "failed to find video source\n");
		return PTR_ERR(in);
	}

	ddata->in = in;

	return 0;
}

static int sharp_ls_probe(struct platform_device *pdev)
{
	struct panel_drv_data *ddata;
	struct omap_dss_device *dssdev;
	int r;

	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
	if (ddata == NULL)
		return -ENOMEM;

	platform_set_drvdata(pdev, ddata);

	if (!pdev->dev.of_node)
		return -ENODEV;

	r = sharp_ls_probe_of(pdev);
	if (r)
		return r;

	ddata->videomode = sharp_ls_timings;

	dssdev = &ddata->dssdev;
	dssdev->dev = &pdev->dev;
	dssdev->driver = &sharp_ls_ops;
	dssdev->type = OMAP_DISPLAY_TYPE_DPI;
	dssdev->owner = THIS_MODULE;
	dssdev->panel.timings = ddata->videomode;
	dssdev->phy.dpi.data_lines = ddata->data_lines;

	r = omapdss_register_display(dssdev);
	if (r) {
		dev_err(&pdev->dev, "Failed to register panel\n");
		goto err_reg;
	}

	return 0;

err_reg:
	omap_dss_put_device(ddata->in);
	return r;
}

static int __exit sharp_ls_remove(struct platform_device *pdev)
{
	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
	struct omap_dss_device *dssdev = &ddata->dssdev;
	struct omap_dss_device *in = ddata->in;

	omapdss_unregister_display(dssdev);

	sharp_ls_disable(dssdev);
	sharp_ls_disconnect(dssdev);

	omap_dss_put_device(in);

	return 0;
}

static const struct of_device_id sharp_ls_of_match[] = {
	{ .compatible = "omapdss,sharp,ls037v7dw01", },
	{},
};

MODULE_DEVICE_TABLE(of, sharp_ls_of_match);

static struct platform_driver sharp_ls_driver = {
	.probe = sharp_ls_probe,
	.remove = __exit_p(sharp_ls_remove),
	.driver = {
		.name = "panel-sharp-ls037v7dw01",
		.of_match_table = sharp_ls_of_match,
		.suppress_bind_attrs = true,
	},
};

module_platform_driver(sharp_ls_driver);

MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
MODULE_DESCRIPTION("Sharp LS037V7DW01 Panel Driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
922ae890 TV	1	/*
	2	* LCD panel driver for Sharp LS037V7DW01
	3	*
	4	* Copyright (C) 2013 Texas Instruments
	5	* Author: Tomi Valkeinen <tomi.valkeinen@ti.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
	12	#include <linux/delay.h>
d9e32ecd	13	#include <linux/gpio/consumer.h>
922ae890	14	#include <linux/module.h>
be88c16a TL	15	#include <linux/of.h>
be88c16a TL	16	#include <linux/of_gpio.h>
922ae890 TV	17	#include <linux/platform_device.h>
922ae890 TV	18	#include <linux/slab.h>
be88c16a	19	#include <linux/regulator/consumer.h>
922ae890	20	#include <video/omapdss.h>
922ae890 TV	21
	22	struct panel_drv_data {
	23	struct omap_dss_device dssdev;
	24	struct omap_dss_device *in;
be88c16a	25	struct regulator *vcc;
922ae890 TV	26
	27	int data_lines;
	28
	29	struct omap_video_timings videomode;
	30
9522f9fe TL	31	struct gpio_desc resb_gpio; / low = reset active min 20 us */
	32	struct gpio_desc ini_gpio; / high = power on */
	33	struct gpio_desc mo_gpio; / low = 480x640, high = 240x320 */
	34	struct gpio_desc lr_gpio; / high = conventional horizontal scanning */
	35	struct gpio_desc ud_gpio; / high = conventional vertical scanning */
922ae890 TV	36	};
	37
	38	static const struct omap_video_timings sharp_ls_timings = {
	39	.x_res = 480,
	40	.y_res = 640,
	41
d8d78941	42	.pixelclock = 19200000,
922ae890 TV	43
	44	.hsw = 2,
	45	.hfp = 1,
	46	.hbp = 28,
	47
	48	.vsw = 1,
	49	.vfp = 1,
	50	.vbp = 1,
	51
	52	.vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
	53	.hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
	54	.data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
	55	.de_level = OMAPDSS_SIG_ACTIVE_HIGH,
7a16360d	56	.sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE,
922ae890 TV	57	};
	58
	59	#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
	60
	61	static int sharp_ls_connect(struct omap_dss_device *dssdev)
	62	{
	63	struct panel_drv_data *ddata = to_panel_data(dssdev);
	64	struct omap_dss_device *in = ddata->in;
	65	int r;
	66
	67	if (omapdss_device_is_connected(dssdev))
	68	return 0;
	69
	70	r = in->ops.dpi->connect(in, dssdev);
	71	if (r)
	72	return r;
	73
	74	return 0;
	75	}
	76
	77	static void sharp_ls_disconnect(struct omap_dss_device *dssdev)
	78	{
	79	struct panel_drv_data *ddata = to_panel_data(dssdev);
	80	struct omap_dss_device *in = ddata->in;
	81
	82	if (!omapdss_device_is_connected(dssdev))
	83	return;
	84
	85	in->ops.dpi->disconnect(in, dssdev);
	86	}
	87
	88	static int sharp_ls_enable(struct omap_dss_device *dssdev)
	89	{
	90	struct panel_drv_data *ddata = to_panel_data(dssdev);
	91	struct omap_dss_device *in = ddata->in;
	92	int r;
	93
	94	if (!omapdss_device_is_connected(dssdev))
	95	return -ENODEV;
	96
	97	if (omapdss_device_is_enabled(dssdev))
	98	return 0;
	99
be88c16a TL	100	if (ddata->data_lines)
be88c16a TL	101	in->ops.dpi->set_data_lines(in, ddata->data_lines);
922ae890 TV	102	in->ops.dpi->set_timings(in, &ddata->videomode);
922ae890 TV	103
be88c16a TL	104	if (ddata->vcc) {
	105	r = regulator_enable(ddata->vcc);
	106	if (r != 0)
	107	return r;
	108	}
	109
922ae890	110	r = in->ops.dpi->enable(in);
be88c16a TL	111	if (r) {
be88c16a TL	112	regulator_disable(ddata->vcc);
922ae890	113	return r;
be88c16a	114	}
922ae890 TV	115
	116	/* wait couple of vsyncs until enabling the LCD */
	117	msleep(50);
	118
9522f9fe TL	119	if (ddata->resb_gpio)
9522f9fe TL	120	gpiod_set_value_cansleep(ddata->resb_gpio, 1);
922ae890	121
9522f9fe TL	122	if (ddata->ini_gpio)
9522f9fe TL	123	gpiod_set_value_cansleep(ddata->ini_gpio, 1);
922ae890 TV	124
	125	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
	126
	127	return 0;
	128	}
	129
	130	static void sharp_ls_disable(struct omap_dss_device *dssdev)
	131	{
	132	struct panel_drv_data *ddata = to_panel_data(dssdev);
	133	struct omap_dss_device *in = ddata->in;
	134
	135	if (!omapdss_device_is_enabled(dssdev))
	136	return;
	137
9522f9fe TL	138	if (ddata->ini_gpio)
9522f9fe TL	139	gpiod_set_value_cansleep(ddata->ini_gpio, 0);
922ae890	140
9522f9fe TL	141	if (ddata->resb_gpio)
9522f9fe TL	142	gpiod_set_value_cansleep(ddata->resb_gpio, 0);
922ae890 TV	143
	144	/* wait at least 5 vsyncs after disabling the LCD */
	145
	146	msleep(100);
	147
	148	in->ops.dpi->disable(in);
	149
be88c16a TL	150	if (ddata->vcc)
	151	regulator_disable(ddata->vcc);
	152
922ae890 TV	153	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
	154	}
	155
	156	static void sharp_ls_set_timings(struct omap_dss_device *dssdev,
	157	struct omap_video_timings *timings)
	158	{
	159	struct panel_drv_data *ddata = to_panel_data(dssdev);
	160	struct omap_dss_device *in = ddata->in;
	161
	162	ddata->videomode = *timings;
	163	dssdev->panel.timings = *timings;
	164
	165	in->ops.dpi->set_timings(in, timings);
	166	}
	167
	168	static void sharp_ls_get_timings(struct omap_dss_device *dssdev,
	169	struct omap_video_timings *timings)
	170	{
	171	struct panel_drv_data *ddata = to_panel_data(dssdev);
	172
	173	*timings = ddata->videomode;
	174	}
	175
	176	static int sharp_ls_check_timings(struct omap_dss_device *dssdev,
	177	struct omap_video_timings *timings)
	178	{
	179	struct panel_drv_data *ddata = to_panel_data(dssdev);
	180	struct omap_dss_device *in = ddata->in;
	181
	182	return in->ops.dpi->check_timings(in, timings);
	183	}
	184
	185	static struct omap_dss_driver sharp_ls_ops = {
	186	.connect = sharp_ls_connect,
	187	.disconnect = sharp_ls_disconnect,
	188
	189	.enable = sharp_ls_enable,
	190	.disable = sharp_ls_disable,
	191
	192	.set_timings = sharp_ls_set_timings,
	193	.get_timings = sharp_ls_get_timings,
	194	.check_timings = sharp_ls_check_timings,
	195
	196	.get_resolution = omapdss_default_get_resolution,
	197	};
	198
be88c16a TL	199	static int sharp_ls_get_gpio_of(struct device *dev, int index, int val,
	200	const char desc, struct gpio_desc *gpiod)
	201	{
	202	struct gpio_desc *gd;
be88c16a TL	203
	204	*gpiod = NULL;
	205
ca8c67da	206	gd = devm_gpiod_get_index(dev, desc, index, GPIOD_OUT_LOW);
be88c16a	207	if (IS_ERR(gd))
ca8c67da	208	return PTR_ERR(gd);
be88c16a TL	209
	210	*gpiod = gd;
	211	return 0;
	212	}
	213
	214	static int sharp_ls_probe_of(struct platform_device *pdev)
	215	{
	216	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
	217	struct device_node *node = pdev->dev.of_node;
	218	struct omap_dss_device *in;
	219	int r;
	220
	221	ddata->vcc = devm_regulator_get(&pdev->dev, "envdd");
	222	if (IS_ERR(ddata->vcc)) {
	223	dev_err(&pdev->dev, "failed to get regulator\n");
	224	return PTR_ERR(ddata->vcc);
	225	}
	226
	227	/* lcd INI */
	228	r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "enable", &ddata->ini_gpio);
	229	if (r)
	230	return r;
	231
	232	/* lcd RESB */
	233	r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "reset", &ddata->resb_gpio);
	234	if (r)
	235	return r;
	236
	237	/* lcd MO */
	238	r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "mode", &ddata->mo_gpio);
	239	if (r)
	240	return r;
	241
	242	/* lcd LR */
	243	r = sharp_ls_get_gpio_of(&pdev->dev, 1, 1, "mode", &ddata->lr_gpio);
	244	if (r)
	245	return r;
	246
	247	/* lcd UD */
	248	r = sharp_ls_get_gpio_of(&pdev->dev, 2, 1, "mode", &ddata->ud_gpio);
	249	if (r)
	250	return r;
	251
	252	in = omapdss_of_find_source_for_first_ep(node);
	253	if (IS_ERR(in)) {
	254	dev_err(&pdev->dev, "failed to find video source\n");
	255	return PTR_ERR(in);
	256	}
	257
	258	ddata->in = in;
	259
	260	return 0;
	261	}
	262
922ae890 TV	263	static int sharp_ls_probe(struct platform_device *pdev)
	264	{
	265	struct panel_drv_data *ddata;
	266	struct omap_dss_device *dssdev;
	267	int r;
	268
	269	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
	270	if (ddata == NULL)
	271	return -ENOMEM;
	272
	273	platform_set_drvdata(pdev, ddata);
	274
393c2698	275	if (!pdev->dev.of_node)
922ae890	276	return -ENODEV;
393c2698 TV	277
	278	r = sharp_ls_probe_of(pdev);
	279	if (r)
	280	return r;
922ae890	281
922ae890 TV	282	ddata->videomode = sharp_ls_timings;
	283
	284	dssdev = &ddata->dssdev;
	285	dssdev->dev = &pdev->dev;
	286	dssdev->driver = &sharp_ls_ops;
	287	dssdev->type = OMAP_DISPLAY_TYPE_DPI;
	288	dssdev->owner = THIS_MODULE;
	289	dssdev->panel.timings = ddata->videomode;
	290	dssdev->phy.dpi.data_lines = ddata->data_lines;
	291
	292	r = omapdss_register_display(dssdev);
	293	if (r) {
	294	dev_err(&pdev->dev, "Failed to register panel\n");
	295	goto err_reg;
	296	}
	297
	298	return 0;
	299
	300	err_reg:
922ae890 TV	301	omap_dss_put_device(ddata->in);
	302	return r;
	303	}
	304
	305	static int __exit sharp_ls_remove(struct platform_device *pdev)
	306	{
	307	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
	308	struct omap_dss_device *dssdev = &ddata->dssdev;
	309	struct omap_dss_device *in = ddata->in;
	310
	311	omapdss_unregister_display(dssdev);
	312
	313	sharp_ls_disable(dssdev);
	314	sharp_ls_disconnect(dssdev);
	315
	316	omap_dss_put_device(in);
	317
	318	return 0;
	319	}
	320
be88c16a TL	321	static const struct of_device_id sharp_ls_of_match[] = {
	322	{ .compatible = "omapdss,sharp,ls037v7dw01", },
	323	{},
	324	};
	325
	326	MODULE_DEVICE_TABLE(of, sharp_ls_of_match);
	327
922ae890 TV	328	static struct platform_driver sharp_ls_driver = {
	329	.probe = sharp_ls_probe,
	330	.remove = __exit_p(sharp_ls_remove),
	331	.driver = {
	332	.name = "panel-sharp-ls037v7dw01",
be88c16a	333	.of_match_table = sharp_ls_of_match,
422ccbd5	334	.suppress_bind_attrs = true,
922ae890 TV	335	},
	336	};
	337
	338	module_platform_driver(sharp_ls_driver);
	339
	340	MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
	341	MODULE_DESCRIPTION("Sharp LS037V7DW01 Panel Driver");
	342	MODULE_LICENSE("GPL");