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[kvmfornfv.git] / kernel / drivers / video / fbdev / omap2 / displays-new / panel-nec-nl8048hl11.c
1 /*
2  * NEC NL8048HL11 Panel driver
3  *
4  * Copyright (C) 2010 Texas Instruments Inc.
5  * Author: Erik Gilling <konkers@android.com>
6  * Converted to new DSS device model: Tomi Valkeinen <tomi.valkeinen@ti.com>
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  */
13
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
24 struct 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  * NEC PIX Clock Ratings
42  * MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz
43  */
44 #define LCD_PIXEL_CLOCK         23800000
45
46 static 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
70 static 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
90 static 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; /* register address write */
97         data = 0x0100 | reg_data; /* register data write */
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
107 static int init_nec_8048_wvga_lcd(struct spi_device *spi)
108 {
109         unsigned int i;
110         /* Initialization Sequence */
111         /* nec_8048_spi_send(spi, REG, VAL) */
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
121 static 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
137 static 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
148 static 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
176 static 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
192 static 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
204 static 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
212 static 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
221 static 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
236 static 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
263 static 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         /* XXX the panel spec doesn't mention any QVGA pin?? */
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
291 static 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
361 err_reg:
362 err_gpio:
363         omap_dss_put_device(ddata->in);
364         return r;
365 }
366
367 static 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
386 static 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
396 static int nec_8048_resume(struct device *dev)
397 {
398         struct spi_device *spi = to_spi_device(dev);
399
400         /* reinitialize the panel */
401         spi_setup(spi);
402         nec_8048_spi_send(spi, 2, 0x00);
403         init_nec_8048_wvga_lcd(spi);
404
405         return 0;
406 }
407 static 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
414 static const struct of_device_id nec_8048_of_match[] = {
415         { .compatible = "omapdss,nec,nl8048hl11", },
416         {},
417 };
418
419 MODULE_DEVICE_TABLE(of, nec_8048_of_match);
420
421 static struct spi_driver nec_8048_driver = {
422         .driver = {
423                 .name   = "panel-nec-nl8048hl11",
424                 .owner  = THIS_MODULE,
425                 .pm     = NEC_8048_PM_OPS,
426                 .of_match_table = nec_8048_of_match,
427                 .suppress_bind_attrs = true,
428         },
429         .probe  = nec_8048_probe,
430         .remove = nec_8048_remove,
431 };
432
433 module_spi_driver(nec_8048_driver);
434
435 MODULE_ALIAS("spi:nec,nl8048hl11");
436 MODULE_AUTHOR("Erik Gilling <konkers@android.com>");
437 MODULE_DESCRIPTION("NEC-NL8048HL11 Driver");
438 MODULE_LICENSE("GPL");