This source file includes following definitions.
- nec_8048_spi_send
- init_nec_8048_wvga_lcd
- nec_8048_connect
- nec_8048_disconnect
- nec_8048_enable
- nec_8048_disable
- nec_8048_set_timings
- nec_8048_get_timings
- nec_8048_check_timings
- nec_8048_probe_of
- nec_8048_probe
- nec_8048_remove
- nec_8048_suspend
- nec_8048_resume
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10 #include <linux/module.h>
11 #include <linux/delay.h>
12 #include <linux/spi/spi.h>
13 #include <linux/fb.h>
14 #include <linux/gpio.h>
15 #include <linux/of_gpio.h>
16
17 #include <video/omapfb_dss.h>
18
19 struct panel_drv_data {
20 struct omap_dss_device dssdev;
21 struct omap_dss_device *in;
22
23 struct omap_video_timings videomode;
24
25 int data_lines;
26
27 int res_gpio;
28 int qvga_gpio;
29
30 struct spi_device *spi;
31 };
32
33 #define LCD_XRES 800
34 #define LCD_YRES 480
35
36
37
38
39 #define LCD_PIXEL_CLOCK 23800000
40
41 static const struct {
42 unsigned char addr;
43 unsigned char dat;
44 } nec_8048_init_seq[] = {
45 { 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 }, { 5, 0x14 },
46 { 6, 0x24 }, { 16, 0xD7 }, { 17, 0x00 }, { 18, 0x00 }, { 19, 0x55 },
47 { 20, 0x01 }, { 21, 0x70 }, { 22, 0x1E }, { 23, 0x25 }, { 24, 0x25 },
48 { 25, 0x02 }, { 26, 0x02 }, { 27, 0xA0 }, { 32, 0x2F }, { 33, 0x0F },
49 { 34, 0x0F }, { 35, 0x0F }, { 36, 0x0F }, { 37, 0x0F }, { 38, 0x0F },
50 { 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 }, { 42, 0x02 }, { 43, 0x0F },
51 { 44, 0x0F }, { 45, 0x0F }, { 46, 0x0F }, { 47, 0x0F }, { 48, 0x0F },
52 { 49, 0x0F }, { 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 },
53 { 80, 0x0C }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 }, { 86, 0x14 },
54 { 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 }, { 92, 0x02 }, { 93, 0x0C },
55 { 94, 0x1C }, { 95, 0x27 }, { 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 },
56 { 103, 0x27 }, { 112, 0x01 }, { 113, 0x0E }, { 114, 0x02 },
57 { 115, 0x0C }, { 118, 0x0C }, { 121, 0x30 }, { 130, 0x00 },
58 { 131, 0x00 }, { 132, 0xFC }, { 134, 0x00 }, { 136, 0x00 },
59 { 138, 0x00 }, { 139, 0x00 }, { 140, 0x00 }, { 141, 0xFC },
60 { 143, 0x00 }, { 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 },
61 { 149, 0x00 }, { 150, 0xFC }, { 152, 0x00 }, { 154, 0x00 },
62 { 156, 0x00 }, { 157, 0x00 }, { 2, 0x00 },
63 };
64
65 static const struct omap_video_timings nec_8048_panel_timings = {
66 .x_res = LCD_XRES,
67 .y_res = LCD_YRES,
68 .pixelclock = LCD_PIXEL_CLOCK,
69 .hfp = 6,
70 .hsw = 1,
71 .hbp = 4,
72 .vfp = 3,
73 .vsw = 1,
74 .vbp = 4,
75
76 .vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
77 .hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
78 .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
79 .de_level = OMAPDSS_SIG_ACTIVE_HIGH,
80 .sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
81 };
82
83 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
84
85 static int nec_8048_spi_send(struct spi_device *spi, unsigned char reg_addr,
86 unsigned char reg_data)
87 {
88 int ret = 0;
89 unsigned int cmd = 0, data = 0;
90
91 cmd = 0x0000 | reg_addr;
92 data = 0x0100 | reg_data;
93 data = (cmd << 16) | data;
94
95 ret = spi_write(spi, (unsigned char *)&data, 4);
96 if (ret)
97 pr_err("error in spi_write %x\n", data);
98
99 return ret;
100 }
101
102 static int init_nec_8048_wvga_lcd(struct spi_device *spi)
103 {
104 unsigned int i;
105
106
107 for (i = 0; i < (ARRAY_SIZE(nec_8048_init_seq) - 1); i++)
108 nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
109 nec_8048_init_seq[i].dat);
110 udelay(20);
111 nec_8048_spi_send(spi, nec_8048_init_seq[i].addr,
112 nec_8048_init_seq[i].dat);
113 return 0;
114 }
115
116 static int nec_8048_connect(struct omap_dss_device *dssdev)
117 {
118 struct panel_drv_data *ddata = to_panel_data(dssdev);
119 struct omap_dss_device *in = ddata->in;
120 int r;
121
122 if (omapdss_device_is_connected(dssdev))
123 return 0;
124
125 r = in->ops.dpi->connect(in, dssdev);
126 if (r)
127 return r;
128
129 return 0;
130 }
131
132 static void nec_8048_disconnect(struct omap_dss_device *dssdev)
133 {
134 struct panel_drv_data *ddata = to_panel_data(dssdev);
135 struct omap_dss_device *in = ddata->in;
136
137 if (!omapdss_device_is_connected(dssdev))
138 return;
139
140 in->ops.dpi->disconnect(in, dssdev);
141 }
142
143 static int nec_8048_enable(struct omap_dss_device *dssdev)
144 {
145 struct panel_drv_data *ddata = to_panel_data(dssdev);
146 struct omap_dss_device *in = ddata->in;
147 int r;
148
149 if (!omapdss_device_is_connected(dssdev))
150 return -ENODEV;
151
152 if (omapdss_device_is_enabled(dssdev))
153 return 0;
154
155 if (ddata->data_lines)
156 in->ops.dpi->set_data_lines(in, ddata->data_lines);
157 in->ops.dpi->set_timings(in, &ddata->videomode);
158
159 r = in->ops.dpi->enable(in);
160 if (r)
161 return r;
162
163 if (gpio_is_valid(ddata->res_gpio))
164 gpio_set_value_cansleep(ddata->res_gpio, 1);
165
166 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
167
168 return 0;
169 }
170
171 static void nec_8048_disable(struct omap_dss_device *dssdev)
172 {
173 struct panel_drv_data *ddata = to_panel_data(dssdev);
174 struct omap_dss_device *in = ddata->in;
175
176 if (!omapdss_device_is_enabled(dssdev))
177 return;
178
179 if (gpio_is_valid(ddata->res_gpio))
180 gpio_set_value_cansleep(ddata->res_gpio, 0);
181
182 in->ops.dpi->disable(in);
183
184 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
185 }
186
187 static void nec_8048_set_timings(struct omap_dss_device *dssdev,
188 struct omap_video_timings *timings)
189 {
190 struct panel_drv_data *ddata = to_panel_data(dssdev);
191 struct omap_dss_device *in = ddata->in;
192
193 ddata->videomode = *timings;
194 dssdev->panel.timings = *timings;
195
196 in->ops.dpi->set_timings(in, timings);
197 }
198
199 static void nec_8048_get_timings(struct omap_dss_device *dssdev,
200 struct omap_video_timings *timings)
201 {
202 struct panel_drv_data *ddata = to_panel_data(dssdev);
203
204 *timings = ddata->videomode;
205 }
206
207 static int nec_8048_check_timings(struct omap_dss_device *dssdev,
208 struct omap_video_timings *timings)
209 {
210 struct panel_drv_data *ddata = to_panel_data(dssdev);
211 struct omap_dss_device *in = ddata->in;
212
213 return in->ops.dpi->check_timings(in, timings);
214 }
215
216 static struct omap_dss_driver nec_8048_ops = {
217 .connect = nec_8048_connect,
218 .disconnect = nec_8048_disconnect,
219
220 .enable = nec_8048_enable,
221 .disable = nec_8048_disable,
222
223 .set_timings = nec_8048_set_timings,
224 .get_timings = nec_8048_get_timings,
225 .check_timings = nec_8048_check_timings,
226
227 .get_resolution = omapdss_default_get_resolution,
228 };
229
230
231 static int nec_8048_probe_of(struct spi_device *spi)
232 {
233 struct device_node *node = spi->dev.of_node;
234 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
235 struct omap_dss_device *in;
236 int gpio;
237
238 gpio = of_get_named_gpio(node, "reset-gpios", 0);
239 if (!gpio_is_valid(gpio)) {
240 dev_err(&spi->dev, "failed to parse enable gpio\n");
241 return gpio;
242 }
243 ddata->res_gpio = gpio;
244
245
246 ddata->qvga_gpio = -ENOENT;
247
248 in = omapdss_of_find_source_for_first_ep(node);
249 if (IS_ERR(in)) {
250 dev_err(&spi->dev, "failed to find video source\n");
251 return PTR_ERR(in);
252 }
253
254 ddata->in = in;
255
256 return 0;
257 }
258
259 static int nec_8048_probe(struct spi_device *spi)
260 {
261 struct panel_drv_data *ddata;
262 struct omap_dss_device *dssdev;
263 int r;
264
265 dev_dbg(&spi->dev, "%s\n", __func__);
266
267 if (!spi->dev.of_node)
268 return -ENODEV;
269
270 spi->mode = SPI_MODE_0;
271 spi->bits_per_word = 32;
272
273 r = spi_setup(spi);
274 if (r < 0) {
275 dev_err(&spi->dev, "spi_setup failed: %d\n", r);
276 return r;
277 }
278
279 init_nec_8048_wvga_lcd(spi);
280
281 ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
282 if (ddata == NULL)
283 return -ENOMEM;
284
285 dev_set_drvdata(&spi->dev, ddata);
286
287 ddata->spi = spi;
288
289 r = nec_8048_probe_of(spi);
290 if (r)
291 return r;
292
293 if (gpio_is_valid(ddata->qvga_gpio)) {
294 r = devm_gpio_request_one(&spi->dev, ddata->qvga_gpio,
295 GPIOF_OUT_INIT_HIGH, "lcd QVGA");
296 if (r)
297 goto err_gpio;
298 }
299
300 if (gpio_is_valid(ddata->res_gpio)) {
301 r = devm_gpio_request_one(&spi->dev, ddata->res_gpio,
302 GPIOF_OUT_INIT_LOW, "lcd RES");
303 if (r)
304 goto err_gpio;
305 }
306
307 ddata->videomode = nec_8048_panel_timings;
308
309 dssdev = &ddata->dssdev;
310 dssdev->dev = &spi->dev;
311 dssdev->driver = &nec_8048_ops;
312 dssdev->type = OMAP_DISPLAY_TYPE_DPI;
313 dssdev->owner = THIS_MODULE;
314 dssdev->panel.timings = ddata->videomode;
315
316 r = omapdss_register_display(dssdev);
317 if (r) {
318 dev_err(&spi->dev, "Failed to register panel\n");
319 goto err_reg;
320 }
321
322 return 0;
323
324 err_reg:
325 err_gpio:
326 omap_dss_put_device(ddata->in);
327 return r;
328 }
329
330 static int nec_8048_remove(struct spi_device *spi)
331 {
332 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
333 struct omap_dss_device *dssdev = &ddata->dssdev;
334 struct omap_dss_device *in = ddata->in;
335
336 dev_dbg(&ddata->spi->dev, "%s\n", __func__);
337
338 omapdss_unregister_display(dssdev);
339
340 nec_8048_disable(dssdev);
341 nec_8048_disconnect(dssdev);
342
343 omap_dss_put_device(in);
344
345 return 0;
346 }
347
348 #ifdef CONFIG_PM_SLEEP
349 static int nec_8048_suspend(struct device *dev)
350 {
351 struct spi_device *spi = to_spi_device(dev);
352
353 nec_8048_spi_send(spi, 2, 0x01);
354 mdelay(40);
355
356 return 0;
357 }
358
359 static int nec_8048_resume(struct device *dev)
360 {
361 struct spi_device *spi = to_spi_device(dev);
362
363
364 spi_setup(spi);
365 nec_8048_spi_send(spi, 2, 0x00);
366 init_nec_8048_wvga_lcd(spi);
367
368 return 0;
369 }
370 static SIMPLE_DEV_PM_OPS(nec_8048_pm_ops, nec_8048_suspend,
371 nec_8048_resume);
372 #define NEC_8048_PM_OPS (&nec_8048_pm_ops)
373 #else
374 #define NEC_8048_PM_OPS NULL
375 #endif
376
377 static const struct of_device_id nec_8048_of_match[] = {
378 { .compatible = "omapdss,nec,nl8048hl11", },
379 {},
380 };
381
382 MODULE_DEVICE_TABLE(of, nec_8048_of_match);
383
384 static struct spi_driver nec_8048_driver = {
385 .driver = {
386 .name = "panel-nec-nl8048hl11",
387 .pm = NEC_8048_PM_OPS,
388 .of_match_table = nec_8048_of_match,
389 .suppress_bind_attrs = true,
390 },
391 .probe = nec_8048_probe,
392 .remove = nec_8048_remove,
393 };
394
395 module_spi_driver(nec_8048_driver);
396
397 MODULE_ALIAS("spi:nec,nl8048hl11");
398 MODULE_AUTHOR("Erik Gilling <konkers@android.com>");
399 MODULE_DESCRIPTION("NEC-NL8048HL11 Driver");
400 MODULE_LICENSE("GPL");