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14#include <linux/module.h>
15#include <linux/delay.h>
16#include <linux/spi/spi.h>
17#include <linux/fb.h>
18#include <linux/gpio.h>
19#include <linux/of_gpio.h>
20
21#include <video/omapdss.h>
22#include <video/omap-panel-data.h>
23
24struct panel_drv_data {
25 struct omap_dss_device dssdev;
26 struct omap_dss_device *in;
27
28 struct omap_video_timings videomode;
29
30 int data_lines;
31
32 int res_gpio;
33 int qvga_gpio;
34
35 struct spi_device *spi;
36};
37
38#define LCD_XRES 800
39#define LCD_YRES 480
40
41
42
43
44#define LCD_PIXEL_CLOCK 23800000
45
46static const struct {
47 unsigned char addr;
48 unsigned char dat;
49} nec_8048_init_seq[] = {
50 { 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 },
51 { 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 },
52 { 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 },
53 { 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F },
54 { 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F },
55 { 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F },
56 { 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F },
57 { 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 },
58 { 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 },
59 { 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C },
60 { 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 },
61 { 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 },
62 { 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 },
63 { 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 },
64 { 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC },
65 { 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 },
66 { 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 },
67 { 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 },
68};
69
70static const struct omap_video_timings nec_8048_panel_timings = {
71 .x_res = LCD_XRES,
72 .y_res = LCD_YRES,
73 .pixelclock = LCD_PIXEL_CLOCK,
74 .hfp = 6,
75 .hsw = 1,
76 .hbp = 4,
77 .vfp = 3,
78 .vsw = 1,
79 .vbp = 4,
80
81 .vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
82 .hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
83 .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
84 .de_level = OMAPDSS_SIG_ACTIVE_HIGH,
85 .sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
86};
87
88#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
89
90static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr,
91 unsigned char reg_data)
92{
93 int ret = 0;
94 unsigned int cmd = 0, data = 0;
95
96 cmd = 0x0000 | reg_addr;
97 data = 0x0100 | reg_data;
98 data = (cmd << 16) | data;
99
100 ret = spi_write(spi, (unsigned char *)&data, 4);
101 if (ret)
102 pr_err("error in spi_write %x\n", data);
103
104 return ret;
105}
106
107static int init_nec_8048_wvga_lcd(struct spi_device *spi)
108{
109 unsigned int i;
110
111
112 for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++)
113 nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
114 nec_8048_init_seq[i].dat);
115 udelay(20);
116 nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
117 nec_8048_init_seq[i].dat);
118 return 0;
119}
120
121static int nec_8048_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 return 0;
135}
136
137static void nec_8048_disconnect(struct omap_dss_device *dssdev)
138{
139 struct panel_drv_data *ddata = to_panel_data(dssdev);
140 struct omap_dss_device *in = ddata->in;
141
142 if (!omapdss_device_is_connected(dssdev))
143 return;
144
145 in->ops.dpi->disconnect(in, dssdev);
146}
147
148static int nec_8048_enable(struct omap_dss_device *dssdev)
149{
150 struct panel_drv_data *ddata = to_panel_data(dssdev);
151 struct omap_dss_device *in = ddata->in;
152 int r;
153
154 if (!omapdss_device_is_connected(dssdev))
155 return -ENODEV;
156
157 if (omapdss_device_is_enabled(dssdev))
158 return 0;
159
160 if (ddata->data_lines)
161 in->ops.dpi->set_data_lines(in, ddata->data_lines);
162 in->ops.dpi->set_timings(in, &ddata->videomode);
163
164 r = in->ops.dpi->enable(in);
165 if (r)
166 return r;
167
168 if (gpio_is_valid(ddata->res_gpio))
169 gpio_set_value_cansleep(ddata->res_gpio, 1);
170
171 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
172
173 return 0;
174}
175
176static void nec_8048_disable(struct omap_dss_device *dssdev)
177{
178 struct panel_drv_data *ddata = to_panel_data(dssdev);
179 struct omap_dss_device *in = ddata->in;
180
181 if (!omapdss_device_is_enabled(dssdev))
182 return;
183
184 if (gpio_is_valid(ddata->res_gpio))
185 gpio_set_value_cansleep(ddata->res_gpio, 0);
186
187 in->ops.dpi->disable(in);
188
189 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
190}
191
192static void nec_8048_set_timings(struct omap_dss_device *dssdev,
193 struct omap_video_timings *timings)
194{
195 struct panel_drv_data *ddata = to_panel_data(dssdev);
196 struct omap_dss_device *in = ddata->in;
197
198 ddata->videomode = *timings;
199 dssdev->panel.timings = *timings;
200
201 in->ops.dpi->set_timings(in, timings);
202}
203
204static void nec_8048_get_timings(struct omap_dss_device *dssdev,
205 struct omap_video_timings *timings)
206{
207 struct panel_drv_data *ddata = to_panel_data(dssdev);
208
209 *timings = ddata->videomode;
210}
211
212static int nec_8048_check_timings(struct omap_dss_device *dssdev,
213 struct omap_video_timings *timings)
214{
215 struct panel_drv_data *ddata = to_panel_data(dssdev);
216 struct omap_dss_device *in = ddata->in;
217
218 return in->ops.dpi->check_timings(in, timings);
219}
220
221static struct omap_dss_driver nec_8048_ops = {
222 .connect = nec_8048_connect,
223 .disconnect = nec_8048_disconnect,
224
225 .enable = nec_8048_enable,
226 .disable = nec_8048_disable,
227
228 .set_timings = nec_8048_set_timings,
229 .get_timings = nec_8048_get_timings,
230 .check_timings = nec_8048_check_timings,
231
232 .get_resolution = omapdss_default_get_resolution,
233};
234
235
236static int nec_8048_probe_pdata(struct spi_device *spi)
237{
238 const struct panel_nec_nl8048hl11_platform_data *pdata;
239 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
240 struct omap_dss_device *dssdev, *in;
241
242 pdata = dev_get_platdata(&spi->dev);
243
244 ddata->qvga_gpio = pdata->qvga_gpio;
245 ddata->res_gpio = pdata->res_gpio;
246
247 in = omap_dss_find_output(pdata->source);
248 if (in == NULL) {
249 dev_err(&spi->dev, "failed to find video source '%s'\n",
250 pdata->source);
251 return -EPROBE_DEFER;
252 }
253 ddata->in = in;
254
255 ddata->data_lines = pdata->data_lines;
256
257 dssdev = &ddata->dssdev;
258 dssdev->name = pdata->name;
259
260 return 0;
261}
262
263static int nec_8048_probe_of(struct spi_device *spi)
264{
265 struct device_node *node = spi->dev.of_node;
266 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
267 struct omap_dss_device *in;
268 int gpio;
269
270 gpio = of_get_named_gpio(node, "reset-gpios", 0);
271 if (!gpio_is_valid(gpio)) {
272 dev_err(&spi->dev, "failed to parse enable gpio\n");
273 return gpio;
274 }
275 ddata->res_gpio = gpio;
276
277
278 ddata->qvga_gpio = -ENOENT;
279
280 in = omapdss_of_find_source_for_first_ep(node);
281 if (IS_ERR(in)) {
282 dev_err(&spi->dev, "failed to find video source\n");
283 return PTR_ERR(in);
284 }
285
286 ddata->in = in;
287
288 return 0;
289}
290
291static int nec_8048_probe(struct spi_device *spi)
292{
293 struct panel_drv_data *ddata;
294 struct omap_dss_device *dssdev;
295 int r;
296
297 dev_dbg(&spi->dev, "%s\n", __func__);
298
299 spi->mode = SPI_MODE_0;
300 spi->bits_per_word = 32;
301
302 r = spi_setup(spi);
303 if (r < 0) {
304 dev_err(&spi->dev, "spi_setup failed: %d\n", r);
305 return r;
306 }
307
308 init_nec_8048_wvga_lcd(spi);
309
310 ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
311 if (ddata == NULL)
312 return -ENOMEM;
313
314 dev_set_drvdata(&spi->dev, ddata);
315
316 ddata->spi = spi;
317
318 if (dev_get_platdata(&spi->dev)) {
319 r = nec_8048_probe_pdata(spi);
320 if (r)
321 return r;
322 } else if (spi->dev.of_node) {
323 r = nec_8048_probe_of(spi);
324 if (r)
325 return r;
326 } else {
327 return -ENODEV;
328 }
329
330 if (gpio_is_valid(ddata->qvga_gpio)) {
331 r = devm_gpio_request_one(&spi->dev, ddata->qvga_gpio,
332 GPIOF_OUT_INIT_HIGH, "lcd QVGA");
333 if (r)
334 goto err_gpio;
335 }
336
337 if (gpio_is_valid(ddata->res_gpio)) {
338 r = devm_gpio_request_one(&spi->dev, ddata->res_gpio,
339 GPIOF_OUT_INIT_LOW, "lcd RES");
340 if (r)
341 goto err_gpio;
342 }
343
344 ddata->videomode = nec_8048_panel_timings;
345
346 dssdev = &ddata->dssdev;
347 dssdev->dev = &spi->dev;
348 dssdev->driver = &nec_8048_ops;
349 dssdev->type = OMAP_DISPLAY_TYPE_DPI;
350 dssdev->owner = THIS_MODULE;
351 dssdev->panel.timings = ddata->videomode;
352
353 r = omapdss_register_display(dssdev);
354 if (r) {
355 dev_err(&spi->dev, "Failed to register panel\n");
356 goto err_reg;
357 }
358
359 return 0;
360
361err_reg:
362err_gpio:
363 omap_dss_put_device(ddata->in);
364 return r;
365}
366
367static int nec_8048_remove(struct spi_device *spi)
368{
369 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
370 struct omap_dss_device *dssdev = &ddata->dssdev;
371 struct omap_dss_device *in = ddata->in;
372
373 dev_dbg(&ddata->spi->dev, "%s\n", __func__);
374
375 omapdss_unregister_display(dssdev);
376
377 nec_8048_disable(dssdev);
378 nec_8048_disconnect(dssdev);
379
380 omap_dss_put_device(in);
381
382 return 0;
383}
384
385#ifdef CONFIG_PM_SLEEP
386static int nec_8048_suspend(struct device *dev)
387{
388 struct spi_device *spi = to_spi_device(dev);
389
390 nec_8048_spi_send(spi, 2, 0x01);
391 mdelay(40);
392
393 return 0;
394}
395
396static int nec_8048_resume(struct device *dev)
397{
398 struct spi_device *spi = to_spi_device(dev);
399
400
401 spi_setup(spi);
402 nec_8048_spi_send(spi, 2, 0x00);
403 init_nec_8048_wvga_lcd(spi);
404
405 return 0;
406}
407static SIMPLE_DEV_PM_OPS(nec_8048_pm_ops, nec_8048_suspend,
408 nec_8048_resume);
409#define NEC_8048_PM_OPS (&nec_8048_pm_ops)
410#else
411#define NEC_8048_PM_OPS NULL
412#endif
413
414static const struct of_device_id nec_8048_of_match[] = {
415 { .compatible = "omapdss,nec,nl8048hl11", },
416 {},
417};
418
419MODULE_DEVICE_TABLE(of, nec_8048_of_match);
420
421static struct spi_driver nec_8048_driver = {
422 .driver = {
423 .name = "panel-nec-nl8048hl11",
424 .pm = NEC_8048_PM_OPS,
425 .of_match_table = nec_8048_of_match,
426 .suppress_bind_attrs = true,
427 },
428 .probe = nec_8048_probe,
429 .remove = nec_8048_remove,
430};
431
432module_spi_driver(nec_8048_driver);
433
434MODULE_ALIAS("spi:nec,nl8048hl11");
435MODULE_AUTHOR("Erik Gilling <konkers@android.com>");
436MODULE_DESCRIPTION("NEC-NL8048HL11 Driver");
437MODULE_LICENSE("GPL");
438
