[deliverable/linux.git] / drivers / video / omap2 / displays-new / encoder-tfp410.c

/*
 * TFP410 DPI-to-DVI encoder 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/gpio.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

#include <video/omapdss.h>
#include <video/omap-panel-data.h>

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

	int pd_gpio;
	int data_lines;

	struct omap_video_timings timings;
};

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

static int tfp410_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;

	if (omapdss_device_is_connected(dssdev))
		return -EBUSY;

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

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

	return 0;
}

static void tfp410_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(!omapdss_device_is_connected(dssdev));
	if (!omapdss_device_is_connected(dssdev))
		return;

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

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

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

static int tfp410_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;

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

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

	if (gpio_is_valid(ddata->pd_gpio))
		gpio_set_value_cansleep(ddata->pd_gpio, 1);

	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;

	return 0;
}

static void tfp410_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 (gpio_is_valid(ddata->pd_gpio))
		gpio_set_value_cansleep(ddata->pd_gpio, 0);

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

	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
}

static void tfp410_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.dpi->set_timings(in, timings);
}

static void tfp410_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 tfp410_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 const struct omapdss_dvi_ops tfp410_dvi_ops = {
	.connect	= tfp410_connect,
	.disconnect	= tfp410_disconnect,

	.enable		= tfp410_enable,
	.disable	= tfp410_disable,

	.check_timings	= tfp410_check_timings,
	.set_timings	= tfp410_set_timings,
	.get_timings	= tfp410_get_timings,
};

static int tfp410_probe_pdata(struct platform_device *pdev)
{
	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
	struct encoder_tfp410_platform_data *pdata;
	struct omap_dss_device *dssdev, *in;

	pdata = dev_get_platdata(&pdev->dev);

	ddata->pd_gpio = pdata->power_down_gpio;

	ddata->data_lines = pdata->data_lines;

	in = omap_dss_find_output(pdata->source);
	if (in == NULL) {
		dev_err(&pdev->dev, "Failed to find video source\n");
		return -ENODEV;
	}

	ddata->in = in;

	dssdev = &ddata->dssdev;
	dssdev->name = pdata->name;

	return 0;
}

static int tfp410_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)
		return -ENOMEM;

	platform_set_drvdata(pdev, ddata);

	if (dev_get_platdata(&pdev->dev)) {
		r = tfp410_probe_pdata(pdev);
		if (r)
			return r;
	} else {
		return -ENODEV;
	}

	if (gpio_is_valid(ddata->pd_gpio)) {
		r = devm_gpio_request_one(&pdev->dev, ddata->pd_gpio,
				GPIOF_OUT_INIT_LOW, "tfp410 PD");
		if (r) {
			dev_err(&pdev->dev, "Failed to request PD GPIO %d\n",
					ddata->pd_gpio);
			goto err_gpio;
		}
	}

	dssdev = &ddata->dssdev;
	dssdev->ops.dvi = &tfp410_dvi_ops;
	dssdev->dev = &pdev->dev;
	dssdev->type = OMAP_DISPLAY_TYPE_DPI;
	dssdev->output_type = OMAP_DISPLAY_TYPE_DVI;
	dssdev->owner = THIS_MODULE;
	dssdev->phy.dpi.data_lines = ddata->data_lines;

	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 tfp410_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))
		tfp410_disable(dssdev);

	WARN_ON(omapdss_device_is_connected(dssdev));
	if (omapdss_device_is_connected(dssdev))
		tfp410_disconnect(dssdev, dssdev->dst);

	omap_dss_put_device(in);

	return 0;
}

static struct platform_driver tfp410_driver = {
	.probe	= tfp410_probe,
	.remove	= __exit_p(tfp410_remove),
	.driver	= {
		.name	= "tfp410",
		.owner	= THIS_MODULE,
	},
};

module_platform_driver(tfp410_driver);

MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
MODULE_DESCRIPTION("TFP410 DPI to DVI encoder driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
2773fefb TV	1	/*
	2	* TFP410 DPI-to-DVI encoder 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/gpio.h>
	13	#include <linux/module.h>
	14	#include <linux/platform_device.h>
	15	#include <linux/slab.h>
	16
	17	#include <video/omapdss.h>
	18	#include <video/omap-panel-data.h>
	19
	20	struct panel_drv_data {
	21	struct omap_dss_device dssdev;
	22	struct omap_dss_device *in;
	23
	24	int pd_gpio;
	25	int data_lines;
	26
	27	struct omap_video_timings timings;
	28	};
	29
	30	#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
	31
	32	static int tfp410_connect(struct omap_dss_device *dssdev,
	33	struct omap_dss_device *dst)
	34	{
	35	struct panel_drv_data *ddata = to_panel_data(dssdev);
	36	struct omap_dss_device *in = ddata->in;
	37	int r;
	38
	39	if (omapdss_device_is_connected(dssdev))
	40	return -EBUSY;
	41
	42	r = in->ops.dpi->connect(in, dssdev);
	43	if (r)
	44	return r;
	45
a73fdc64	46	dst->src = dssdev;
9560dc10	47	dssdev->dst = dst;
2773fefb TV	48
	49	return 0;
	50	}
	51
	52	static void tfp410_disconnect(struct omap_dss_device *dssdev,
	53	struct omap_dss_device *dst)
	54	{
	55	struct panel_drv_data *ddata = to_panel_data(dssdev);
	56	struct omap_dss_device *in = ddata->in;
	57
	58	WARN_ON(!omapdss_device_is_connected(dssdev));
	59	if (!omapdss_device_is_connected(dssdev))
	60	return;
	61
9560dc10 TV	62	WARN_ON(dst != dssdev->dst);
9560dc10 TV	63	if (dst != dssdev->dst)
2773fefb TV	64	return;
2773fefb TV	65
a73fdc64	66	dst->src = NULL;
9560dc10	67	dssdev->dst = NULL;
2773fefb TV	68
	69	in->ops.dpi->disconnect(in, &ddata->dssdev);
	70	}
	71
	72	static int tfp410_enable(struct omap_dss_device *dssdev)
	73	{
	74	struct panel_drv_data *ddata = to_panel_data(dssdev);
	75	struct omap_dss_device *in = ddata->in;
	76	int r;
	77
	78	if (!omapdss_device_is_connected(dssdev))
	79	return -ENODEV;
	80
	81	if (omapdss_device_is_enabled(dssdev))
	82	return 0;
	83
	84	in->ops.dpi->set_timings(in, &ddata->timings);
	85	in->ops.dpi->set_data_lines(in, ddata->data_lines);
	86
	87	r = in->ops.dpi->enable(in);
	88	if (r)
	89	return r;
	90
	91	if (gpio_is_valid(ddata->pd_gpio))
	92	gpio_set_value_cansleep(ddata->pd_gpio, 1);
	93
	94	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
	95
	96	return 0;
	97	}
	98
	99	static void tfp410_disable(struct omap_dss_device *dssdev)
	100	{
	101	struct panel_drv_data *ddata = to_panel_data(dssdev);
	102	struct omap_dss_device *in = ddata->in;
	103
	104	if (!omapdss_device_is_enabled(dssdev))
	105	return;
	106
	107	if (gpio_is_valid(ddata->pd_gpio))
	108	gpio_set_value_cansleep(ddata->pd_gpio, 0);
	109
	110	in->ops.dpi->disable(in);
	111
	112	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
	113	}
	114
	115	static void tfp410_set_timings(struct omap_dss_device *dssdev,
	116	struct omap_video_timings *timings)
	117	{
	118	struct panel_drv_data *ddata = to_panel_data(dssdev);
	119	struct omap_dss_device *in = ddata->in;
	120
	121	ddata->timings = *timings;
	122	dssdev->panel.timings = *timings;
	123
	124	in->ops.dpi->set_timings(in, timings);
	125	}
	126
	127	static void tfp410_get_timings(struct omap_dss_device *dssdev,
	128	struct omap_video_timings *timings)
	129	{
	130	struct panel_drv_data *ddata = to_panel_data(dssdev);
	131
132	*timings = ddata->timings;
133	}
134
135	static int tfp410_check_timings(struct omap_dss_device *dssdev,
136	struct omap_video_timings *timings)
137	{
138	struct panel_drv_data *ddata = to_panel_data(dssdev);
139	struct omap_dss_device *in = ddata->in;
140
141	return in->ops.dpi->check_timings(in, timings);
142	}
143
144	static const struct omapdss_dvi_ops tfp410_dvi_ops = {
145	.connect = tfp410_connect,
146	.disconnect = tfp410_disconnect,
147
148	.enable = tfp410_enable,
149	.disable = tfp410_disable,
150
151	.check_timings = tfp410_check_timings,
152	.set_timings = tfp410_set_timings,
153	.get_timings = tfp410_get_timings,
154	};
155
156	static int tfp410_probe_pdata(struct platform_device *pdev)
157	{
158	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
159	struct encoder_tfp410_platform_data *pdata;
160	struct omap_dss_device dssdev, in;
161
162	pdata = dev_get_platdata(&pdev->dev);
163
164	ddata->pd_gpio = pdata->power_down_gpio;
165
166	ddata->data_lines = pdata->data_lines;
167
168	in = omap_dss_find_output(pdata->source);
169	if (in == NULL) {
170	dev_err(&pdev->dev, "Failed to find video source\n");
171	return -ENODEV;
172	}
173
174	ddata->in = in;
175
176	dssdev = &ddata->dssdev;
177	dssdev->name = pdata->name;
178
179	return 0;
180	}
181
182	static int tfp410_probe(struct platform_device *pdev)
183	{
184	struct panel_drv_data *ddata;
185	struct omap_dss_device *dssdev;
186	int r;
187
188	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
189	if (!ddata)
190	return -ENOMEM;
191
192	platform_set_drvdata(pdev, ddata);
193
194	if (dev_get_platdata(&pdev->dev)) {
195	r = tfp410_probe_pdata(pdev);
196	if (r)
197	return r;
198	} else {
199	return -ENODEV;
200	}
201
202	if (gpio_is_valid(ddata->pd_gpio)) {
203	r = devm_gpio_request_one(&pdev->dev, ddata->pd_gpio,
204	GPIOF_OUT_INIT_LOW, "tfp410 PD");
205	if (r) {
206	dev_err(&pdev->dev, "Failed to request PD GPIO %d\n",
207	ddata->pd_gpio);
208	goto err_gpio;
209	}
210	}
211
212	dssdev = &ddata->dssdev;
213	dssdev->ops.dvi = &tfp410_dvi_ops;
214	dssdev->dev = &pdev->dev;
215	dssdev->type = OMAP_DISPLAY_TYPE_DPI;
216	dssdev->output_type = OMAP_DISPLAY_TYPE_DVI;
217	dssdev->owner = THIS_MODULE;
218	dssdev->phy.dpi.data_lines = ddata->data_lines;
219
220	r = omapdss_register_output(dssdev);
221	if (r) {
222	dev_err(&pdev->dev, "Failed to register output\n");
223	goto err_reg;
224	}
225
226	return 0;
227	err_reg:
228	err_gpio:
229	omap_dss_put_device(ddata->in);
230	return r;
231	}
232
233	static int __exit tfp410_remove(struct platform_device *pdev)
234	{
235	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
236	struct omap_dss_device *dssdev = &ddata->dssdev;
237	struct omap_dss_device *in = ddata->in;
238
239	omapdss_unregister_output(&ddata->dssdev);
240
241	WARN_ON(omapdss_device_is_enabled(dssdev));
242	if (omapdss_device_is_enabled(dssdev))
243	tfp410_disable(dssdev);
244
245	WARN_ON(omapdss_device_is_connected(dssdev));
246	if (omapdss_device_is_connected(dssdev))
9560dc10	247	tfp410_disconnect(dssdev, dssdev->dst);
2773fefb TV	248
	249	omap_dss_put_device(in);
	250
	251	return 0;
	252	}
	253
	254	static struct platform_driver tfp410_driver = {
	255	.probe = tfp410_probe,
	256	.remove = __exit_p(tfp410_remove),
	257	.driver = {
	258	.name = "tfp410",
	259	.owner = THIS_MODULE,
	260	},
	261	};
	262
	263	module_platform_driver(tfp410_driver);
	264
	265	MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
	266	MODULE_DESCRIPTION("TFP410 DPI to DVI encoder driver");
	267	MODULE_LICENSE("GPL");