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12#include <linux/delay.h>
13#include <linux/gpio.h>
14#include <linux/module.h>
15#include <linux/of.h>
16#include <linux/of_gpio.h>
17#include <linux/platform_device.h>
18#include <linux/slab.h>
19#include <linux/regulator/consumer.h>
20#include <video/omapdss.h>
21#include <video/omap-panel-data.h>
22
23struct panel_drv_data {
24 struct omap_dss_device dssdev;
25 struct omap_dss_device *in;
26 struct regulator *vcc;
27
28 int data_lines;
29
30 struct omap_video_timings videomode;
31
32 struct gpio_desc *resb_gpio;
33 struct gpio_desc *ini_gpio;
34 struct gpio_desc *mo_gpio;
35 struct gpio_desc *lr_gpio;
36 struct gpio_desc *ud_gpio;
37};
38
39static const struct omap_video_timings sharp_ls_timings = {
40 .x_res = 480,
41 .y_res = 640,
42
43 .pixelclock = 19200000,
44
45 .hsw = 2,
46 .hfp = 1,
47 .hbp = 28,
48
49 .vsw = 1,
50 .vfp = 1,
51 .vbp = 1,
52
53 .vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
54 .hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
55 .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
56 .de_level = OMAPDSS_SIG_ACTIVE_HIGH,
57 .sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE,
58};
59
60#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
61
62static int sharp_ls_connect(struct omap_dss_device *dssdev)
63{
64 struct panel_drv_data *ddata = to_panel_data(dssdev);
65 struct omap_dss_device *in = ddata->in;
66 int r;
67
68 if (omapdss_device_is_connected(dssdev))
69 return 0;
70
71 r = in->ops.dpi->connect(in, dssdev);
72 if (r)
73 return r;
74
75 return 0;
76}
77
78static void sharp_ls_disconnect(struct omap_dss_device *dssdev)
79{
80 struct panel_drv_data *ddata = to_panel_data(dssdev);
81 struct omap_dss_device *in = ddata->in;
82
83 if (!omapdss_device_is_connected(dssdev))
84 return;
85
86 in->ops.dpi->disconnect(in, dssdev);
87}
88
89static int sharp_ls_enable(struct omap_dss_device *dssdev)
90{
91 struct panel_drv_data *ddata = to_panel_data(dssdev);
92 struct omap_dss_device *in = ddata->in;
93 int r;
94
95 if (!omapdss_device_is_connected(dssdev))
96 return -ENODEV;
97
98 if (omapdss_device_is_enabled(dssdev))
99 return 0;
100
101 if (ddata->data_lines)
102 in->ops.dpi->set_data_lines(in, ddata->data_lines);
103 in->ops.dpi->set_timings(in, &ddata->videomode);
104
105 if (ddata->vcc) {
106 r = regulator_enable(ddata->vcc);
107 if (r != 0)
108 return r;
109 }
110
111 r = in->ops.dpi->enable(in);
112 if (r) {
113 regulator_disable(ddata->vcc);
114 return r;
115 }
116
117
118 msleep(50);
119
120 if (ddata->resb_gpio)
121 gpiod_set_value_cansleep(ddata->resb_gpio, 1);
122
123 if (ddata->ini_gpio)
124 gpiod_set_value_cansleep(ddata->ini_gpio, 1);
125
126 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
127
128 return 0;
129}
130
131static void sharp_ls_disable(struct omap_dss_device *dssdev)
132{
133 struct panel_drv_data *ddata = to_panel_data(dssdev);
134 struct omap_dss_device *in = ddata->in;
135
136 if (!omapdss_device_is_enabled(dssdev))
137 return;
138
139 if (ddata->ini_gpio)
140 gpiod_set_value_cansleep(ddata->ini_gpio, 0);
141
142 if (ddata->resb_gpio)
143 gpiod_set_value_cansleep(ddata->resb_gpio, 0);
144
145
146
147 msleep(100);
148
149 in->ops.dpi->disable(in);
150
151 if (ddata->vcc)
152 regulator_disable(ddata->vcc);
153
154 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
155}
156
157static void sharp_ls_set_timings(struct omap_dss_device *dssdev,
158 struct omap_video_timings *timings)
159{
160 struct panel_drv_data *ddata = to_panel_data(dssdev);
161 struct omap_dss_device *in = ddata->in;
162
163 ddata->videomode = *timings;
164 dssdev->panel.timings = *timings;
165
166 in->ops.dpi->set_timings(in, timings);
167}
168
169static void sharp_ls_get_timings(struct omap_dss_device *dssdev,
170 struct omap_video_timings *timings)
171{
172 struct panel_drv_data *ddata = to_panel_data(dssdev);
173
174 *timings = ddata->videomode;
175}
176
177static int sharp_ls_check_timings(struct omap_dss_device *dssdev,
178 struct omap_video_timings *timings)
179{
180 struct panel_drv_data *ddata = to_panel_data(dssdev);
181 struct omap_dss_device *in = ddata->in;
182
183 return in->ops.dpi->check_timings(in, timings);
184}
185
186static struct omap_dss_driver sharp_ls_ops = {
187 .connect = sharp_ls_connect,
188 .disconnect = sharp_ls_disconnect,
189
190 .enable = sharp_ls_enable,
191 .disable = sharp_ls_disable,
192
193 .set_timings = sharp_ls_set_timings,
194 .get_timings = sharp_ls_get_timings,
195 .check_timings = sharp_ls_check_timings,
196
197 .get_resolution = omapdss_default_get_resolution,
198};
199
200static int sharp_ls_get_gpio(struct device *dev, int gpio, unsigned long flags,
201 char *desc, struct gpio_desc **gpiod)
202{
203 int r;
204
205 r = devm_gpio_request_one(dev, gpio, flags, desc);
206 if (r) {
207 *gpiod = NULL;
208 return r == -ENOENT ? 0 : r;
209 }
210
211 *gpiod = gpio_to_desc(gpio);
212
213 return 0;
214}
215
216static int sharp_ls_probe_pdata(struct platform_device *pdev)
217{
218 const struct panel_sharp_ls037v7dw01_platform_data *pdata;
219 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
220 struct omap_dss_device *dssdev, *in;
221 int r;
222
223 pdata = dev_get_platdata(&pdev->dev);
224
225 in = omap_dss_find_output(pdata->source);
226 if (in == NULL) {
227 dev_err(&pdev->dev, "failed to find video source '%s'\n",
228 pdata->source);
229 return -EPROBE_DEFER;
230 }
231
232 ddata->in = in;
233
234 ddata->data_lines = pdata->data_lines;
235
236 dssdev = &ddata->dssdev;
237 dssdev->name = pdata->name;
238
239 r = sharp_ls_get_gpio(&pdev->dev, pdata->mo_gpio, GPIOF_OUT_INIT_LOW,
240 "lcd MO", &ddata->mo_gpio);
241 if (r)
242 return r;
243 r = sharp_ls_get_gpio(&pdev->dev, pdata->lr_gpio, GPIOF_OUT_INIT_HIGH,
244 "lcd LR", &ddata->lr_gpio);
245 if (r)
246 return r;
247 r = sharp_ls_get_gpio(&pdev->dev, pdata->ud_gpio, GPIOF_OUT_INIT_HIGH,
248 "lcd UD", &ddata->ud_gpio);
249 if (r)
250 return r;
251 r = sharp_ls_get_gpio(&pdev->dev, pdata->resb_gpio, GPIOF_OUT_INIT_LOW,
252 "lcd RESB", &ddata->resb_gpio);
253 if (r)
254 return r;
255 r = sharp_ls_get_gpio(&pdev->dev, pdata->ini_gpio, GPIOF_OUT_INIT_LOW,
256 "lcd INI", &ddata->ini_gpio);
257 if (r)
258 return r;
259
260 return 0;
261}
262
263static int sharp_ls_get_gpio_of(struct device *dev, int index, int val,
264 const char *desc, struct gpio_desc **gpiod)
265{
266 struct gpio_desc *gd;
267
268 *gpiod = NULL;
269
270 gd = devm_gpiod_get_index(dev, desc, index, GPIOD_OUT_LOW);
271 if (IS_ERR(gd))
272 return PTR_ERR(gd);
273
274 *gpiod = gd;
275 return 0;
276}
277
278static int sharp_ls_probe_of(struct platform_device *pdev)
279{
280 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
281 struct device_node *node = pdev->dev.of_node;
282 struct omap_dss_device *in;
283 int r;
284
285 ddata->vcc = devm_regulator_get(&pdev->dev, "envdd");
286 if (IS_ERR(ddata->vcc)) {
287 dev_err(&pdev->dev, "failed to get regulator\n");
288 return PTR_ERR(ddata->vcc);
289 }
290
291
292 r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "enable", &ddata->ini_gpio);
293 if (r)
294 return r;
295
296
297 r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "reset", &ddata->resb_gpio);
298 if (r)
299 return r;
300
301
302 r = sharp_ls_get_gpio_of(&pdev->dev, 0, 0, "mode", &ddata->mo_gpio);
303 if (r)
304 return r;
305
306
307 r = sharp_ls_get_gpio_of(&pdev->dev, 1, 1, "mode", &ddata->lr_gpio);
308 if (r)
309 return r;
310
311
312 r = sharp_ls_get_gpio_of(&pdev->dev, 2, 1, "mode", &ddata->ud_gpio);
313 if (r)
314 return r;
315
316 in = omapdss_of_find_source_for_first_ep(node);
317 if (IS_ERR(in)) {
318 dev_err(&pdev->dev, "failed to find video source\n");
319 return PTR_ERR(in);
320 }
321
322 ddata->in = in;
323
324 return 0;
325}
326
327static int sharp_ls_probe(struct platform_device *pdev)
328{
329 struct panel_drv_data *ddata;
330 struct omap_dss_device *dssdev;
331 int r;
332
333 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
334 if (ddata == NULL)
335 return -ENOMEM;
336
337 platform_set_drvdata(pdev, ddata);
338
339 if (dev_get_platdata(&pdev->dev)) {
340 r = sharp_ls_probe_pdata(pdev);
341 if (r)
342 return r;
343 } else if (pdev->dev.of_node) {
344 r = sharp_ls_probe_of(pdev);
345 if (r)
346 return r;
347 } else {
348 return -ENODEV;
349 }
350
351 ddata->videomode = sharp_ls_timings;
352
353 dssdev = &ddata->dssdev;
354 dssdev->dev = &pdev->dev;
355 dssdev->driver = &sharp_ls_ops;
356 dssdev->type = OMAP_DISPLAY_TYPE_DPI;
357 dssdev->owner = THIS_MODULE;
358 dssdev->panel.timings = ddata->videomode;
359 dssdev->phy.dpi.data_lines = ddata->data_lines;
360
361 r = omapdss_register_display(dssdev);
362 if (r) {
363 dev_err(&pdev->dev, "Failed to register panel\n");
364 goto err_reg;
365 }
366
367 return 0;
368
369err_reg:
370 omap_dss_put_device(ddata->in);
371 return r;
372}
373
374static int __exit sharp_ls_remove(struct platform_device *pdev)
375{
376 struct panel_drv_data *ddata = platform_get_drvdata(pdev);
377 struct omap_dss_device *dssdev = &ddata->dssdev;
378 struct omap_dss_device *in = ddata->in;
379
380 omapdss_unregister_display(dssdev);
381
382 sharp_ls_disable(dssdev);
383 sharp_ls_disconnect(dssdev);
384
385 omap_dss_put_device(in);
386
387 return 0;
388}
389
390static const struct of_device_id sharp_ls_of_match[] = {
391 { .compatible = "omapdss,sharp,ls037v7dw01", },
392 {},
393};
394
395MODULE_DEVICE_TABLE(of, sharp_ls_of_match);
396
397static struct platform_driver sharp_ls_driver = {
398 .probe = sharp_ls_probe,
399 .remove = __exit_p(sharp_ls_remove),
400 .driver = {
401 .name = "panel-sharp-ls037v7dw01",
402 .of_match_table = sharp_ls_of_match,
403 .suppress_bind_attrs = true,
404 },
405};
406
407module_platform_driver(sharp_ls_driver);
408
409MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
410MODULE_DESCRIPTION("Sharp LS037V7DW01 Panel Driver");
411MODULE_LICENSE("GPL");
412
