1/*
  2 * Analog TV Connector 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/slab.h>
 13#include <linux/module.h>
 14#include <linux/platform_device.h>
 15#include <linux/of.h>
 16
 17#include <video/omapdss.h>
 18#include <video/omap-panel-data.h>
 19
 20struct panel_drv_data {
 21	struct omap_dss_device dssdev;
 22	struct omap_dss_device *in;
 23
 24	struct device *dev;
 25
 26	struct omap_video_timings timings;
 27
 28	enum omap_dss_venc_type connector_type;
 29	bool invert_polarity;
 30};
 31
 32static const struct omap_video_timings tvc_pal_timings = {
 33	.x_res		= 720,
 34	.y_res		= 574,
 35	.pixelclock	= 13500000,
 36	.hsw		= 64,
 37	.hfp		= 12,
 38	.hbp		= 68,
 39	.vsw		= 5,
 40	.vfp		= 5,
 41	.vbp		= 41,
 42
 43	.interlace	= true,
 44};
 45
 46static const struct of_device_id tvc_of_match[];
 47
 48struct tvc_of_data {
 49	enum omap_dss_venc_type connector_type;
 50};
 51
 52#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
 53
 54static int tvc_connect(struct omap_dss_device *dssdev)
 55{
 56	struct panel_drv_data *ddata = to_panel_data(dssdev);
 57	struct omap_dss_device *in = ddata->in;
 58	int r;
 59
 60	dev_dbg(ddata->dev, "connect\n");
 61
 62	if (omapdss_device_is_connected(dssdev))
 63		return 0;
 64
 65	r = in->ops.atv->connect(in, dssdev);
 66	if (r)
 67		return r;
 68
 69	return 0;
 70}
 71
 72static void tvc_disconnect(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
 77	dev_dbg(ddata->dev, "disconnect\n");
 78
 79	if (!omapdss_device_is_connected(dssdev))
 80		return;
 81
 82	in->ops.atv->disconnect(in, dssdev);
 83}
 84
 85static int tvc_enable(struct omap_dss_device *dssdev)
 86{
 87	struct panel_drv_data *ddata = to_panel_data(dssdev);
 88	struct omap_dss_device *in = ddata->in;
 89	int r;
 90
 91	dev_dbg(ddata->dev, "enable\n");
 92
 93	if (!omapdss_device_is_connected(dssdev))
 94		return -ENODEV;
 95
 96	if (omapdss_device_is_enabled(dssdev))
 97		return 0;
 98
 99	in->ops.atv->set_timings(in, &ddata->timings);
100
101	if (!ddata->dev->of_node) {
102		in->ops.atv->set_type(in, ddata->connector_type);
103
104		in->ops.atv->invert_vid_out_polarity(in,
105			ddata->invert_polarity);
106	}
107
108	r = in->ops.atv->enable(in);
109	if (r)
110		return r;
111
112	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
113
114	return r;
115}
116
117static void tvc_disable(struct omap_dss_device *dssdev)
118{
119	struct panel_drv_data *ddata = to_panel_data(dssdev);
120	struct omap_dss_device *in = ddata->in;
121
122	dev_dbg(ddata->dev, "disable\n");
123
124	if (!omapdss_device_is_enabled(dssdev))
125		return;
126
127	in->ops.atv->disable(in);
128
129	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
130}
131
132static void tvc_set_timings(struct omap_dss_device *dssdev,
133		struct omap_video_timings *timings)
134{
135	struct panel_drv_data *ddata = to_panel_data(dssdev);
136	struct omap_dss_device *in = ddata->in;
137
138	ddata->timings = *timings;
139	dssdev->panel.timings = *timings;
140
141	in->ops.atv->set_timings(in, timings);
142}
143
144static void tvc_get_timings(struct omap_dss_device *dssdev,
145		struct omap_video_timings *timings)
146{
147	struct panel_drv_data *ddata = to_panel_data(dssdev);
148
149	*timings = ddata->timings;
150}
151
152static int tvc_check_timings(struct omap_dss_device *dssdev,
153		struct omap_video_timings *timings)
154{
155	struct panel_drv_data *ddata = to_panel_data(dssdev);
156	struct omap_dss_device *in = ddata->in;
157
158	return in->ops.atv->check_timings(in, timings);
159}
160
161static u32 tvc_get_wss(struct omap_dss_device *dssdev)
162{
163	struct panel_drv_data *ddata = to_panel_data(dssdev);
164	struct omap_dss_device *in = ddata->in;
165
166	return in->ops.atv->get_wss(in);
167}
168
169static int tvc_set_wss(struct omap_dss_device *dssdev, u32 wss)
170{
171	struct panel_drv_data *ddata = to_panel_data(dssdev);
172	struct omap_dss_device *in = ddata->in;
173
174	return in->ops.atv->set_wss(in, wss);
175}
176
177static struct omap_dss_driver tvc_driver = {
178	.connect		= tvc_connect,
179	.disconnect		= tvc_disconnect,
180
181	.enable			= tvc_enable,
182	.disable		= tvc_disable,
183
184	.set_timings		= tvc_set_timings,
185	.get_timings		= tvc_get_timings,
186	.check_timings		= tvc_check_timings,
187
188	.get_resolution		= omapdss_default_get_resolution,
189
190	.get_wss		= tvc_get_wss,
191	.set_wss		= tvc_set_wss,
192};
193
194static int tvc_probe_pdata(struct platform_device *pdev)
195{
196	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
197	struct connector_atv_platform_data *pdata;
198	struct omap_dss_device *in, *dssdev;
199
200	pdata = dev_get_platdata(&pdev->dev);
201
202	in = omap_dss_find_output(pdata->source);
203	if (in == NULL) {
204		dev_err(&pdev->dev, "Failed to find video source\n");
205		return -EPROBE_DEFER;
206	}
207
208	ddata->in = in;
209
210	ddata->connector_type = pdata->connector_type;
211	ddata->invert_polarity = pdata->invert_polarity;
212
213	dssdev = &ddata->dssdev;
214	dssdev->name = pdata->name;
215
216	return 0;
217}
218
219static int tvc_probe_of(struct platform_device *pdev)
220{
221	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
222	struct device_node *node = pdev->dev.of_node;
223	struct omap_dss_device *in;
224
225	in = omapdss_of_find_source_for_first_ep(node);
226	if (IS_ERR(in)) {
227		dev_err(&pdev->dev, "failed to find video source\n");
228		return PTR_ERR(in);
229	}
230
231	ddata->in = in;
232
233	return 0;
234}
235
236static int tvc_probe(struct platform_device *pdev)
237{
238	struct panel_drv_data *ddata;
239	struct omap_dss_device *dssdev;
240	int r;
241
242	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
243	if (!ddata)
244		return -ENOMEM;
245
246	platform_set_drvdata(pdev, ddata);
247	ddata->dev = &pdev->dev;
248
249	if (dev_get_platdata(&pdev->dev)) {
250		r = tvc_probe_pdata(pdev);
251		if (r)
252			return r;
253	} else if (pdev->dev.of_node) {
254		r = tvc_probe_of(pdev);
255		if (r)
256			return r;
257	} else {
258		return -ENODEV;
259	}
260
261	ddata->timings = tvc_pal_timings;
262
263	dssdev = &ddata->dssdev;
264	dssdev->driver = &tvc_driver;
265	dssdev->dev = &pdev->dev;
266	dssdev->type = OMAP_DISPLAY_TYPE_VENC;
267	dssdev->owner = THIS_MODULE;
268	dssdev->panel.timings = tvc_pal_timings;
269
270	r = omapdss_register_display(dssdev);
271	if (r) {
272		dev_err(&pdev->dev, "Failed to register panel\n");
273		goto err_reg;
274	}
275
276	return 0;
277err_reg:
278	omap_dss_put_device(ddata->in);
279	return r;
280}
281
282static int __exit tvc_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_display(&ddata->dssdev);
289
290	tvc_disable(dssdev);
291	tvc_disconnect(dssdev);
292
293	omap_dss_put_device(in);
294
295	return 0;
296}
297
298static const struct of_device_id tvc_of_match[] = {
299	{ .compatible = "omapdss,svideo-connector", },
300	{ .compatible = "omapdss,composite-video-connector", },
301	{},
302};
303
304MODULE_DEVICE_TABLE(of, tvc_of_match);
305
306static struct platform_driver tvc_connector_driver = {
307	.probe	= tvc_probe,
308	.remove	= __exit_p(tvc_remove),
309	.driver	= {
310		.name	= "connector-analog-tv",
311		.of_match_table = tvc_of_match,
312		.suppress_bind_attrs = true,
313	},
314};
315
316module_platform_driver(tvc_connector_driver);
317
318MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
319MODULE_DESCRIPTION("Analog TV Connector driver");
320MODULE_LICENSE("GPL");