[deliverable/linux.git] / drivers / gpu / drm / omapdrm / displays / encoder-tpd12s015.c

/*
 * TPD12S015 HDMI ESD protection & level shifter chip driver
 *
 * 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/completion.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/gpio/consumer.h>

#include "../dss/omapdss.h"

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

	struct gpio_desc *ct_cp_hpd_gpio;
	struct gpio_desc *ls_oe_gpio;
	struct gpio_desc *hpd_gpio;

	struct omap_video_timings timings;
};

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

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

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

	dst->src = dssdev;
	dssdev->dst = dst;

	gpiod_set_value_cansleep(ddata->ct_cp_hpd_gpio, 1);
	/* DC-DC converter needs at max 300us to get to 90% of 5V */
	udelay(300);

	return 0;
}

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

	WARN_ON(dst != dssdev->dst);

	if (dst != dssdev->dst)
		return;

	gpiod_set_value_cansleep(ddata->ct_cp_hpd_gpio, 0);

	dst->src = NULL;
	dssdev->dst = NULL;

	in->ops.hdmi->disconnect(in, &ddata->dssdev);
}

static int tpd_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 (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
		return 0;

	in->ops.hdmi->set_timings(in, &ddata->timings);

	r = in->ops.hdmi->enable(in);
	if (r)
		return r;

	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;

	return r;
}

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

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

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

	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
}

static void tpd_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->timings = *timings;
	dssdev->panel.timings = *timings;

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

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

	*timings = ddata->timings;
}

static int tpd_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;
	int r;

	r = in->ops.hdmi->check_timings(in, timings);

	return r;
}

static int tpd_read_edid(struct omap_dss_device *dssdev,
		u8 *edid, int len)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;
	int r;

	if (!gpiod_get_value_cansleep(ddata->hpd_gpio))
		return -ENODEV;

	gpiod_set_value_cansleep(ddata->ls_oe_gpio, 1);

	r = in->ops.hdmi->read_edid(in, edid, len);

	gpiod_set_value_cansleep(ddata->ls_oe_gpio, 0);

	return r;
}

static bool tpd_detect(struct omap_dss_device *dssdev)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);

	return gpiod_get_value_cansleep(ddata->hpd_gpio);
}

static int tpd_set_infoframe(struct omap_dss_device *dssdev,
		const struct hdmi_avi_infoframe *avi)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	return in->ops.hdmi->set_infoframe(in, avi);
}

static int tpd_set_hdmi_mode(struct omap_dss_device *dssdev,
		bool hdmi_mode)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	return in->ops.hdmi->set_hdmi_mode(in, hdmi_mode);
}

static const struct omapdss_hdmi_ops tpd_hdmi_ops = {
	.connect		= tpd_connect,
	.disconnect		= tpd_disconnect,

	.enable			= tpd_enable,
	.disable		= tpd_disable,

	.check_timings		= tpd_check_timings,
	.set_timings		= tpd_set_timings,
	.get_timings		= tpd_get_timings,

	.read_edid		= tpd_read_edid,
	.detect			= tpd_detect,
	.set_infoframe		= tpd_set_infoframe,
	.set_hdmi_mode		= tpd_set_hdmi_mode,
};

static int tpd_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;

	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 tpd_probe(struct platform_device *pdev)
{
	struct omap_dss_device *in, *dssdev;
	struct panel_drv_data *ddata;
	int r;
	struct gpio_desc *gpio;

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

	platform_set_drvdata(pdev, ddata);

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

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


	gpio = devm_gpiod_get_index_optional(&pdev->dev, NULL, 0,
		 GPIOD_OUT_LOW);
	if (IS_ERR(gpio))
		goto err_gpio;

	ddata->ct_cp_hpd_gpio = gpio;

	gpio = devm_gpiod_get_index_optional(&pdev->dev, NULL, 1,
		 GPIOD_OUT_LOW);
	if (IS_ERR(gpio))
		goto err_gpio;

	ddata->ls_oe_gpio = gpio;

	gpio = devm_gpiod_get_index(&pdev->dev, NULL, 2,
		GPIOD_IN);
	if (IS_ERR(gpio))
		goto err_gpio;

	ddata->hpd_gpio = gpio;

	dssdev = &ddata->dssdev;
	dssdev->ops.hdmi = &tpd_hdmi_ops;
	dssdev->dev = &pdev->dev;
	dssdev->type = OMAP_DISPLAY_TYPE_HDMI;
	dssdev->output_type = OMAP_DISPLAY_TYPE_HDMI;
	dssdev->owner = THIS_MODULE;
	dssdev->port_num = 1;

	in = ddata->in;

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

	return 0;
err_reg:
err_gpio:
	omap_dss_put_device(ddata->in);
	return r;
}

static int __exit tpd_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_output(&ddata->dssdev);

	WARN_ON(omapdss_device_is_enabled(dssdev));
	if (omapdss_device_is_enabled(dssdev))
		tpd_disable(dssdev);

	WARN_ON(omapdss_device_is_connected(dssdev));
	if (omapdss_device_is_connected(dssdev))
		tpd_disconnect(dssdev, dssdev->dst);

	omap_dss_put_device(in);

	return 0;
}

static const struct of_device_id tpd_of_match[] = {
	{ .compatible = "omapdss,ti,tpd12s015", },
	{},
};

MODULE_DEVICE_TABLE(of, tpd_of_match);

static struct platform_driver tpd_driver = {
	.probe	= tpd_probe,
	.remove	= __exit_p(tpd_remove),
	.driver	= {
		.name	= "tpd12s015",
		.of_match_table = tpd_of_match,
		.suppress_bind_attrs = true,
	},
};

module_platform_driver(tpd_driver);

MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
MODULE_DESCRIPTION("TPD12S015 driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
a0ee577f TV	1	/*
	2	* TPD12S015 HDMI ESD protection & level shifter chip driver
	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/completion.h>
	13	#include <linux/delay.h>
	14	#include <linux/module.h>
	15	#include <linux/slab.h>
a0ee577f	16	#include <linux/platform_device.h>
460543ba	17	#include <linux/gpio/consumer.h>
a0ee577f	18
32043da7	19	#include "../dss/omapdss.h"
a0ee577f TV	20
	21	struct panel_drv_data {
	22	struct omap_dss_device dssdev;
	23	struct omap_dss_device *in;
	24
460543ba MA	25	struct gpio_desc *ct_cp_hpd_gpio;
	26	struct gpio_desc *ls_oe_gpio;
	27	struct gpio_desc *hpd_gpio;
a0ee577f TV	28
a0ee577f TV	29	struct omap_video_timings timings;
a0ee577f TV	30	};
	31
	32	#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
	33
a0ee577f TV	34	static int tpd_connect(struct omap_dss_device *dssdev,
	35	struct omap_dss_device *dst)
	36	{
	37	struct panel_drv_data *ddata = to_panel_data(dssdev);
	38	struct omap_dss_device *in = ddata->in;
	39	int r;
	40
	41	r = in->ops.hdmi->connect(in, dssdev);
	42	if (r)
	43	return r;
	44
a73fdc64	45	dst->src = dssdev;
9560dc10	46	dssdev->dst = dst;
a0ee577f	47
460543ba	48	gpiod_set_value_cansleep(ddata->ct_cp_hpd_gpio, 1);
a0ee577f TV	49	/* DC-DC converter needs at max 300us to get to 90% of 5V */
	50	udelay(300);
	51
a0ee577f TV	52	return 0;
	53	}
	54
	55	static void tpd_disconnect(struct omap_dss_device *dssdev,
	56	struct omap_dss_device *dst)
	57	{
	58	struct panel_drv_data *ddata = to_panel_data(dssdev);
	59	struct omap_dss_device *in = ddata->in;
	60
9560dc10	61	WARN_ON(dst != dssdev->dst);
a0ee577f	62
9560dc10	63	if (dst != dssdev->dst)
a0ee577f TV	64	return;
a0ee577f TV	65
460543ba	66	gpiod_set_value_cansleep(ddata->ct_cp_hpd_gpio, 0);
a0ee577f	67
a73fdc64	68	dst->src = NULL;
9560dc10	69	dssdev->dst = NULL;
a0ee577f TV	70
	71	in->ops.hdmi->disconnect(in, &ddata->dssdev);
	72	}
	73
	74	static int tpd_enable(struct omap_dss_device *dssdev)
	75	{
	76	struct panel_drv_data *ddata = to_panel_data(dssdev);
	77	struct omap_dss_device *in = ddata->in;
	78	int r;
	79
	80	if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
	81	return 0;
	82
	83	in->ops.hdmi->set_timings(in, &ddata->timings);
	84
	85	r = in->ops.hdmi->enable(in);
	86	if (r)
	87	return r;
	88
	89	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
	90
	91	return r;
	92	}
	93
	94	static void tpd_disable(struct omap_dss_device *dssdev)
	95	{
	96	struct panel_drv_data *ddata = to_panel_data(dssdev);
	97	struct omap_dss_device *in = ddata->in;
	98
	99	if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
	100	return;
	101
	102	in->ops.hdmi->disable(in);
	103
	104	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
	105	}
	106
	107	static void tpd_set_timings(struct omap_dss_device *dssdev,
	108	struct omap_video_timings *timings)
	109	{
	110	struct panel_drv_data *ddata = to_panel_data(dssdev);
	111	struct omap_dss_device *in = ddata->in;
	112
	113	ddata->timings = *timings;
	114	dssdev->panel.timings = *timings;
	115
	116	in->ops.hdmi->set_timings(in, timings);
	117	}
	118
	119	static void tpd_get_timings(struct omap_dss_device *dssdev,
	120	struct omap_video_timings *timings)
	121	{
	122	struct panel_drv_data *ddata = to_panel_data(dssdev);
	123
	124	*timings = ddata->timings;
	125	}
	126
	127	static int tpd_check_timings(struct omap_dss_device *dssdev,
	128	struct omap_video_timings *timings)
	129	{
	130	struct panel_drv_data *ddata = to_panel_data(dssdev);
	131	struct omap_dss_device *in = ddata->in;
	132	int r;
	133
134	r = in->ops.hdmi->check_timings(in, timings);
135
136	return r;
137	}
138
139	static int tpd_read_edid(struct omap_dss_device *dssdev,
140	u8 *edid, int len)
141	{
142	struct panel_drv_data *ddata = to_panel_data(dssdev);
143	struct omap_dss_device *in = ddata->in;
a87a6d6b	144	int r;
a0ee577f	145
460543ba	146	if (!gpiod_get_value_cansleep(ddata->hpd_gpio))
a0ee577f TV	147	return -ENODEV;
a0ee577f TV	148
460543ba	149	gpiod_set_value_cansleep(ddata->ls_oe_gpio, 1);
a87a6d6b TV	150
	151	r = in->ops.hdmi->read_edid(in, edid, len);
	152
460543ba	153	gpiod_set_value_cansleep(ddata->ls_oe_gpio, 0);
a87a6d6b TV	154
a87a6d6b TV	155	return r;
a0ee577f TV	156	}
	157
	158	static bool tpd_detect(struct omap_dss_device *dssdev)
	159	{
	160	struct panel_drv_data *ddata = to_panel_data(dssdev);
	161
460543ba	162	return gpiod_get_value_cansleep(ddata->hpd_gpio);
a0ee577f TV	163	}
a0ee577f TV	164
9fb1737d TV	165	static int tpd_set_infoframe(struct omap_dss_device *dssdev,
	166	const struct hdmi_avi_infoframe *avi)
	167	{
	168	struct panel_drv_data *ddata = to_panel_data(dssdev);
	169	struct omap_dss_device *in = ddata->in;
	170
	171	return in->ops.hdmi->set_infoframe(in, avi);
	172	}
	173
	174	static int tpd_set_hdmi_mode(struct omap_dss_device *dssdev,
	175	bool hdmi_mode)
	176	{
	177	struct panel_drv_data *ddata = to_panel_data(dssdev);
	178	struct omap_dss_device *in = ddata->in;
	179
	180	return in->ops.hdmi->set_hdmi_mode(in, hdmi_mode);
	181	}
	182
a0ee577f TV	183	static const struct omapdss_hdmi_ops tpd_hdmi_ops = {
	184	.connect = tpd_connect,
	185	.disconnect = tpd_disconnect,
	186
	187	.enable = tpd_enable,
	188	.disable = tpd_disable,
	189
	190	.check_timings = tpd_check_timings,
	191	.set_timings = tpd_set_timings,
	192	.get_timings = tpd_get_timings,
	193
	194	.read_edid = tpd_read_edid,
	195	.detect = tpd_detect,
9fb1737d TV	196	.set_infoframe = tpd_set_infoframe,
9fb1737d TV	197	.set_hdmi_mode = tpd_set_hdmi_mode,
a0ee577f TV	198	};
a0ee577f TV	199
5e4c89c0 TV	200	static int tpd_probe_of(struct platform_device *pdev)
	201	{
	202	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
	203	struct device_node *node = pdev->dev.of_node;
	204	struct omap_dss_device *in;
5e4c89c0 TV	205
	206	in = omapdss_of_find_source_for_first_ep(node);
	207	if (IS_ERR(in)) {
	208	dev_err(&pdev->dev, "failed to find video source\n");
	209	return PTR_ERR(in);
	210	}
	211
	212	ddata->in = in;
	213
	214	return 0;
	215	}
	216
a0ee577f TV	217	static int tpd_probe(struct platform_device *pdev)
	218	{
	219	struct omap_dss_device in, dssdev;
	220	struct panel_drv_data *ddata;
	221	int r;
460543ba	222	struct gpio_desc *gpio;
a0ee577f TV	223
	224	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
	225	if (!ddata)
	226	return -ENOMEM;
	227
	228	platform_set_drvdata(pdev, ddata);
	229
45dd63c4	230	if (!pdev->dev.of_node)
a0ee577f	231	return -ENODEV;
45dd63c4 MA	232
	233	r = tpd_probe_of(pdev);
	234	if (r)
	235	return r;
a0ee577f	236
460543ba	237
d8e31637	238	gpio = devm_gpiod_get_index_optional(&pdev->dev, NULL, 0,
460543ba MA	239	GPIOD_OUT_LOW);
460543ba MA	240	if (IS_ERR(gpio))
a0ee577f TV	241	goto err_gpio;
a0ee577f TV	242
460543ba	243	ddata->ct_cp_hpd_gpio = gpio;
a0ee577f	244
460543ba MA	245	gpio = devm_gpiod_get_index_optional(&pdev->dev, NULL, 1,
	246	GPIOD_OUT_LOW);
	247	if (IS_ERR(gpio))
a0ee577f TV	248	goto err_gpio;
a0ee577f TV	249
460543ba MA	250	ddata->ls_oe_gpio = gpio;
	251
	252	gpio = devm_gpiod_get_index(&pdev->dev, NULL, 2,
	253	GPIOD_IN);
	254	if (IS_ERR(gpio))
	255	goto err_gpio;
	256
	257	ddata->hpd_gpio = gpio;
	258
a0ee577f TV	259	dssdev = &ddata->dssdev;
	260	dssdev->ops.hdmi = &tpd_hdmi_ops;
	261	dssdev->dev = &pdev->dev;
	262	dssdev->type = OMAP_DISPLAY_TYPE_HDMI;
	263	dssdev->output_type = OMAP_DISPLAY_TYPE_HDMI;
	264	dssdev->owner = THIS_MODULE;
ef691ff4	265	dssdev->port_num = 1;
a0ee577f TV	266
	267	in = ddata->in;
	268
	269	r = omapdss_register_output(dssdev);
	270	if (r) {
	271	dev_err(&pdev->dev, "Failed to register output\n");
	272	goto err_reg;
	273	}
	274
	275	return 0;
	276	err_reg:
a0ee577f TV	277	err_gpio:
	278	omap_dss_put_device(ddata->in);
	279	return r;
	280	}
	281
	282	static int __exit tpd_remove(struct platform_device *pdev)
	283	{
	284	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
	285	struct omap_dss_device *dssdev = &ddata->dssdev;
	286	struct omap_dss_device *in = ddata->in;
	287
	288	omapdss_unregister_output(&ddata->dssdev);
	289
	290	WARN_ON(omapdss_device_is_enabled(dssdev));
	291	if (omapdss_device_is_enabled(dssdev))
	292	tpd_disable(dssdev);
	293
	294	WARN_ON(omapdss_device_is_connected(dssdev));
	295	if (omapdss_device_is_connected(dssdev))
9560dc10	296	tpd_disconnect(dssdev, dssdev->dst);
a0ee577f TV	297
	298	omap_dss_put_device(in);
	299
	300	return 0;
	301	}
	302
5e4c89c0 TV	303	static const struct of_device_id tpd_of_match[] = {
	304	{ .compatible = "omapdss,ti,tpd12s015", },
	305	{},
	306	};
	307
	308	MODULE_DEVICE_TABLE(of, tpd_of_match);
	309
a0ee577f TV	310	static struct platform_driver tpd_driver = {
	311	.probe = tpd_probe,
	312	.remove = __exit_p(tpd_remove),
	313	.driver = {
	314	.name = "tpd12s015",
5e4c89c0	315	.of_match_table = tpd_of_match,
422ccbd5	316	.suppress_bind_attrs = true,
a0ee577f TV	317	},
	318	};
	319
	320	module_platform_driver(tpd_driver);
	321
	322	MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
	323	MODULE_DESCRIPTION("TPD12S015 driver");
	324	MODULE_LICENSE("GPL");