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13#include <linux/module.h>
14#include <linux/delay.h>
15#include <linux/spi/spi.h>
16#include <linux/mutex.h>
17#include <linux/gpio.h>
18
19#include <video/omapdss.h>
20#include <video/omap-panel-data.h>
21
22static struct omap_video_timings lb035q02_timings = {
23 .x_res = 320,
24 .y_res = 240,
25
26 .pixelclock = 6500000,
27
28 .hsw = 2,
29 .hfp = 20,
30 .hbp = 68,
31
32 .vsw = 2,
33 .vfp = 4,
34 .vbp = 18,
35
36 .vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
37 .hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
38 .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
39 .de_level = OMAPDSS_SIG_ACTIVE_HIGH,
40 .sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE,
41};
42
43struct panel_drv_data {
44 struct omap_dss_device dssdev;
45 struct omap_dss_device *in;
46
47 struct spi_device *spi;
48
49 int data_lines;
50
51 struct omap_video_timings videomode;
52
53
54 int backlight_gpio;
55
56 struct gpio_desc *enable_gpio;
57};
58
59#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
60
61static int lb035q02_write_reg(struct spi_device *spi, u8 reg, u16 val)
62{
63 struct spi_message msg;
64 struct spi_transfer index_xfer = {
65 .len = 3,
66 .cs_change = 1,
67 };
68 struct spi_transfer value_xfer = {
69 .len = 3,
70 };
71 u8 buffer[16];
72
73 spi_message_init(&msg);
74
75
76 buffer[0] = 0x70;
77 buffer[1] = 0x00;
78 buffer[2] = reg & 0x7f;
79 index_xfer.tx_buf = buffer;
80 spi_message_add_tail(&index_xfer, &msg);
81
82
83 buffer[4] = 0x72;
84 buffer[5] = val >> 8;
85 buffer[6] = val;
86 value_xfer.tx_buf = buffer + 4;
87 spi_message_add_tail(&value_xfer, &msg);
88
89 return spi_sync(spi, &msg);
90}
91
92static void init_lb035q02_panel(struct spi_device *spi)
93{
94
95 lb035q02_write_reg(spi, 0x01, 0x6300);
96 lb035q02_write_reg(spi, 0x02, 0x0200);
97 lb035q02_write_reg(spi, 0x03, 0x0177);
98 lb035q02_write_reg(spi, 0x04, 0x04c7);
99 lb035q02_write_reg(spi, 0x05, 0xffc0);
100 lb035q02_write_reg(spi, 0x06, 0xe806);
101 lb035q02_write_reg(spi, 0x0a, 0x4008);
102 lb035q02_write_reg(spi, 0x0b, 0x0000);
103 lb035q02_write_reg(spi, 0x0d, 0x0030);
104 lb035q02_write_reg(spi, 0x0e, 0x2800);
105 lb035q02_write_reg(spi, 0x0f, 0x0000);
106 lb035q02_write_reg(spi, 0x16, 0x9f80);
107 lb035q02_write_reg(spi, 0x17, 0x0a0f);
108 lb035q02_write_reg(spi, 0x1e, 0x00c1);
109 lb035q02_write_reg(spi, 0x30, 0x0300);
110 lb035q02_write_reg(spi, 0x31, 0x0007);
111 lb035q02_write_reg(spi, 0x32, 0x0000);
112 lb035q02_write_reg(spi, 0x33, 0x0000);
113 lb035q02_write_reg(spi, 0x34, 0x0707);
114 lb035q02_write_reg(spi, 0x35, 0x0004);
115 lb035q02_write_reg(spi, 0x36, 0x0302);
116 lb035q02_write_reg(spi, 0x37, 0x0202);
117 lb035q02_write_reg(spi, 0x3a, 0x0a0d);
118 lb035q02_write_reg(spi, 0x3b, 0x0806);
119}
120
121static int lb035q02_connect(struct omap_dss_device *dssdev)
122{
123 struct panel_drv_data *ddata = to_panel_data(dssdev);
124 struct omap_dss_device *in = ddata->in;
125 int r;
126
127 if (omapdss_device_is_connected(dssdev))
128 return 0;
129
130 r = in->ops.dpi->connect(in, dssdev);
131 if (r)
132 return r;
133
134 init_lb035q02_panel(ddata->spi);
135
136 return 0;
137}
138
139static void lb035q02_disconnect(struct omap_dss_device *dssdev)
140{
141 struct panel_drv_data *ddata = to_panel_data(dssdev);
142 struct omap_dss_device *in = ddata->in;
143
144 if (!omapdss_device_is_connected(dssdev))
145 return;
146
147 in->ops.dpi->disconnect(in, dssdev);
148}
149
150static int lb035q02_enable(struct omap_dss_device *dssdev)
151{
152 struct panel_drv_data *ddata = to_panel_data(dssdev);
153 struct omap_dss_device *in = ddata->in;
154 int r;
155
156 if (!omapdss_device_is_connected(dssdev))
157 return -ENODEV;
158
159 if (omapdss_device_is_enabled(dssdev))
160 return 0;
161
162 if (ddata->data_lines)
163 in->ops.dpi->set_data_lines(in, ddata->data_lines);
164 in->ops.dpi->set_timings(in, &ddata->videomode);
165
166 r = in->ops.dpi->enable(in);
167 if (r)
168 return r;
169
170 if (ddata->enable_gpio)
171 gpiod_set_value_cansleep(ddata->enable_gpio, 1);
172
173 if (gpio_is_valid(ddata->backlight_gpio))
174 gpio_set_value_cansleep(ddata->backlight_gpio, 1);
175
176 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
177
178 return 0;
179}
180
181static void lb035q02_disable(struct omap_dss_device *dssdev)
182{
183 struct panel_drv_data *ddata = to_panel_data(dssdev);
184 struct omap_dss_device *in = ddata->in;
185
186 if (!omapdss_device_is_enabled(dssdev))
187 return;
188
189 if (ddata->enable_gpio)
190 gpiod_set_value_cansleep(ddata->enable_gpio, 0);
191
192 if (gpio_is_valid(ddata->backlight_gpio))
193 gpio_set_value_cansleep(ddata->backlight_gpio, 0);
194
195 in->ops.dpi->disable(in);
196
197 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
198}
199
200static void lb035q02_set_timings(struct omap_dss_device *dssdev,
201 struct omap_video_timings *timings)
202{
203 struct panel_drv_data *ddata = to_panel_data(dssdev);
204 struct omap_dss_device *in = ddata->in;
205
206 ddata->videomode = *timings;
207 dssdev->panel.timings = *timings;
208
209 in->ops.dpi->set_timings(in, timings);
210}
211
212static void lb035q02_get_timings(struct omap_dss_device *dssdev,
213 struct omap_video_timings *timings)
214{
215 struct panel_drv_data *ddata = to_panel_data(dssdev);
216
217 *timings = ddata->videomode;
218}
219
220static int lb035q02_check_timings(struct omap_dss_device *dssdev,
221 struct omap_video_timings *timings)
222{
223 struct panel_drv_data *ddata = to_panel_data(dssdev);
224 struct omap_dss_device *in = ddata->in;
225
226 return in->ops.dpi->check_timings(in, timings);
227}
228
229static struct omap_dss_driver lb035q02_ops = {
230 .connect = lb035q02_connect,
231 .disconnect = lb035q02_disconnect,
232
233 .enable = lb035q02_enable,
234 .disable = lb035q02_disable,
235
236 .set_timings = lb035q02_set_timings,
237 .get_timings = lb035q02_get_timings,
238 .check_timings = lb035q02_check_timings,
239
240 .get_resolution = omapdss_default_get_resolution,
241};
242
243static int lb035q02_probe_pdata(struct spi_device *spi)
244{
245 const struct panel_lb035q02_platform_data *pdata;
246 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
247 struct omap_dss_device *dssdev, *in;
248 int r;
249
250 pdata = dev_get_platdata(&spi->dev);
251
252 in = omap_dss_find_output(pdata->source);
253 if (in == NULL) {
254 dev_err(&spi->dev, "failed to find video source '%s'\n",
255 pdata->source);
256 return -EPROBE_DEFER;
257 }
258
259 ddata->in = in;
260
261 ddata->data_lines = pdata->data_lines;
262
263 dssdev = &ddata->dssdev;
264 dssdev->name = pdata->name;
265
266 r = devm_gpio_request_one(&spi->dev, pdata->enable_gpio,
267 GPIOF_OUT_INIT_LOW, "panel enable");
268 if (r)
269 goto err_gpio;
270
271 ddata->enable_gpio = gpio_to_desc(pdata->enable_gpio);
272
273 ddata->backlight_gpio = pdata->backlight_gpio;
274
275 return 0;
276err_gpio:
277 omap_dss_put_device(ddata->in);
278 return r;
279}
280
281static int lb035q02_probe_of(struct spi_device *spi)
282{
283 struct device_node *node = spi->dev.of_node;
284 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
285 struct omap_dss_device *in;
286 struct gpio_desc *gpio;
287
288 gpio = devm_gpiod_get(&spi->dev, "enable", GPIOD_OUT_LOW);
289 if (IS_ERR(gpio)) {
290 dev_err(&spi->dev, "failed to parse enable gpio\n");
291 return PTR_ERR(gpio);
292 }
293
294 ddata->enable_gpio = gpio;
295
296 ddata->backlight_gpio = -ENOENT;
297
298 in = omapdss_of_find_source_for_first_ep(node);
299 if (IS_ERR(in)) {
300 dev_err(&spi->dev, "failed to find video source\n");
301 return PTR_ERR(in);
302 }
303
304 ddata->in = in;
305
306 return 0;
307}
308
309static int lb035q02_panel_spi_probe(struct spi_device *spi)
310{
311 struct panel_drv_data *ddata;
312 struct omap_dss_device *dssdev;
313 int r;
314
315 ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
316 if (ddata == NULL)
317 return -ENOMEM;
318
319 dev_set_drvdata(&spi->dev, ddata);
320
321 ddata->spi = spi;
322
323 if (dev_get_platdata(&spi->dev)) {
324 r = lb035q02_probe_pdata(spi);
325 if (r)
326 return r;
327 } else if (spi->dev.of_node) {
328 r = lb035q02_probe_of(spi);
329 if (r)
330 return r;
331 } else {
332 return -ENODEV;
333 }
334
335 if (gpio_is_valid(ddata->backlight_gpio)) {
336 r = devm_gpio_request_one(&spi->dev, ddata->backlight_gpio,
337 GPIOF_OUT_INIT_LOW, "panel backlight");
338 if (r)
339 goto err_gpio;
340 }
341
342 ddata->videomode = lb035q02_timings;
343
344 dssdev = &ddata->dssdev;
345 dssdev->dev = &spi->dev;
346 dssdev->driver = &lb035q02_ops;
347 dssdev->type = OMAP_DISPLAY_TYPE_DPI;
348 dssdev->owner = THIS_MODULE;
349 dssdev->panel.timings = ddata->videomode;
350 dssdev->phy.dpi.data_lines = ddata->data_lines;
351
352 r = omapdss_register_display(dssdev);
353 if (r) {
354 dev_err(&spi->dev, "Failed to register panel\n");
355 goto err_reg;
356 }
357
358 return 0;
359
360err_reg:
361err_gpio:
362 omap_dss_put_device(ddata->in);
363 return r;
364}
365
366static int lb035q02_panel_spi_remove(struct spi_device *spi)
367{
368 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
369 struct omap_dss_device *dssdev = &ddata->dssdev;
370 struct omap_dss_device *in = ddata->in;
371
372 omapdss_unregister_display(dssdev);
373
374 lb035q02_disable(dssdev);
375 lb035q02_disconnect(dssdev);
376
377 omap_dss_put_device(in);
378
379 return 0;
380}
381
382static const struct of_device_id lb035q02_of_match[] = {
383 { .compatible = "omapdss,lgphilips,lb035q02", },
384 {},
385};
386
387MODULE_DEVICE_TABLE(of, lb035q02_of_match);
388
389static struct spi_driver lb035q02_spi_driver = {
390 .probe = lb035q02_panel_spi_probe,
391 .remove = lb035q02_panel_spi_remove,
392 .driver = {
393 .name = "panel_lgphilips_lb035q02",
394 .of_match_table = lb035q02_of_match,
395 .suppress_bind_attrs = true,
396 },
397};
398
399module_spi_driver(lb035q02_spi_driver);
400
401MODULE_ALIAS("spi:lgphilips,lb035q02");
402MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
403MODULE_DESCRIPTION("LG.Philips LB035Q02 LCD Panel driver");
404MODULE_LICENSE("GPL");
405
