Merge branches 'core-fixes-for-linus' and 'irq-fixes-for-linus' of git://git.kernel...
[pandora-kernel.git] / drivers / video / omap2 / displays / panel-tpo-td043mtea1.c
1 /*
2  * LCD panel driver for TPO TD043MTEA1
3  *
4  * Author: Gražvydas Ignotas <notasas@gmail.com>
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  */
11
12 #include <linux/module.h>
13 #include <linux/delay.h>
14 #include <linux/spi/spi.h>
15 #include <linux/regulator/consumer.h>
16 #include <linux/gpio.h>
17 #include <linux/err.h>
18 #include <linux/slab.h>
19
20 #include <video/omapdss.h>
21
22 #define TPO_R02_MODE(x)         ((x) & 7)
23 #define TPO_R02_MODE_800x480    7
24 #define TPO_R02_NCLK_RISING     BIT(3)
25 #define TPO_R02_HSYNC_HIGH      BIT(4)
26 #define TPO_R02_VSYNC_HIGH      BIT(5)
27
28 #define TPO_R03_NSTANDBY        BIT(0)
29 #define TPO_R03_EN_CP_CLK       BIT(1)
30 #define TPO_R03_EN_VGL_PUMP     BIT(2)
31 #define TPO_R03_EN_PWM          BIT(3)
32 #define TPO_R03_DRIVING_CAP_100 BIT(4)
33 #define TPO_R03_EN_PRE_CHARGE   BIT(6)
34 #define TPO_R03_SOFTWARE_CTL    BIT(7)
35
36 #define TPO_R04_NFLIP_H         BIT(0)
37 #define TPO_R04_NFLIP_V         BIT(1)
38 #define TPO_R04_CP_CLK_FREQ_1H  BIT(2)
39 #define TPO_R04_VGL_FREQ_1H     BIT(4)
40
41 #define TPO_R03_VAL_NORMAL (TPO_R03_NSTANDBY | TPO_R03_EN_CP_CLK | \
42                         TPO_R03_EN_VGL_PUMP |  TPO_R03_EN_PWM | \
43                         TPO_R03_DRIVING_CAP_100 | TPO_R03_EN_PRE_CHARGE | \
44                         TPO_R03_SOFTWARE_CTL)
45
46 #define TPO_R03_VAL_STANDBY (TPO_R03_DRIVING_CAP_100 | \
47                         TPO_R03_EN_PRE_CHARGE | TPO_R03_SOFTWARE_CTL)
48
49 static const u16 tpo_td043_def_gamma[12] = {
50         106, 200, 289, 375, 460, 543, 625, 705, 785, 864, 942, 1020
51 };
52
53 struct tpo_td043_device {
54         struct spi_device *spi;
55         struct regulator *vcc_reg;
56         u16 gamma[12];
57         u32 mode;
58         u32 hmirror:1;
59         u32 vmirror:1;
60 };
61
62 static int tpo_td043_write(struct spi_device *spi, u8 addr, u8 data)
63 {
64         struct spi_message      m;
65         struct spi_transfer     xfer;
66         u16                     w;
67         int                     r;
68
69         spi_message_init(&m);
70
71         memset(&xfer, 0, sizeof(xfer));
72
73         w = ((u16)addr << 10) | (1 << 8) | data;
74         xfer.tx_buf = &w;
75         xfer.bits_per_word = 16;
76         xfer.len = 2;
77         spi_message_add_tail(&xfer, &m);
78
79         r = spi_sync(spi, &m);
80         if (r < 0)
81                 dev_warn(&spi->dev, "failed to write to LCD reg (%d)\n", r);
82         return r;
83 }
84
85 static void tpo_td043_write_gamma(struct spi_device *spi, u16 gamma[12])
86 {
87         u8 i, val;
88
89         /* gamma bits [9:8] */
90         for (val = i = 0; i < 4; i++)
91                 val |= (gamma[i] & 0x300) >> ((i + 1) * 2);
92         tpo_td043_write(spi, 0x11, val);
93
94         for (val = i = 0; i < 4; i++)
95                 val |= (gamma[i+4] & 0x300) >> ((i + 1) * 2);
96         tpo_td043_write(spi, 0x12, val);
97
98         for (val = i = 0; i < 4; i++)
99                 val |= (gamma[i+8] & 0x300) >> ((i + 1) * 2);
100         tpo_td043_write(spi, 0x13, val);
101
102         /* gamma bits [7:0] */
103         for (val = i = 0; i < 12; i++)
104                 tpo_td043_write(spi, 0x14 + i, gamma[i] & 0xff);
105 }
106
107 static int tpo_td043_write_mirror(struct spi_device *spi, bool h, bool v)
108 {
109         u8 reg4 = TPO_R04_NFLIP_H | TPO_R04_NFLIP_V | \
110                 TPO_R04_CP_CLK_FREQ_1H | TPO_R04_VGL_FREQ_1H;
111         if (h)
112                 reg4 &= ~TPO_R04_NFLIP_H;
113         if (v)
114                 reg4 &= ~TPO_R04_NFLIP_V;
115
116         return tpo_td043_write(spi, 4, reg4);
117 }
118
119 static int tpo_td043_set_hmirror(struct omap_dss_device *dssdev, bool enable)
120 {
121         struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
122
123         tpo_td043->hmirror = enable;
124         return tpo_td043_write_mirror(tpo_td043->spi, tpo_td043->hmirror,
125                         tpo_td043->vmirror);
126 }
127
128 static bool tpo_td043_get_hmirror(struct omap_dss_device *dssdev)
129 {
130         struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
131
132         return tpo_td043->hmirror;
133 }
134
135 static ssize_t tpo_td043_vmirror_show(struct device *dev,
136         struct device_attribute *attr, char *buf)
137 {
138         struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev);
139
140         return snprintf(buf, PAGE_SIZE, "%d\n", tpo_td043->vmirror);
141 }
142
143 static ssize_t tpo_td043_vmirror_store(struct device *dev,
144         struct device_attribute *attr, const char *buf, size_t count)
145 {
146         struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev);
147         int val;
148         int ret;
149
150         ret = kstrtoint(buf, 0, &val);
151         if (ret < 0)
152                 return ret;
153
154         val = !!val;
155
156         ret = tpo_td043_write_mirror(tpo_td043->spi, tpo_td043->hmirror, val);
157         if (ret < 0)
158                 return ret;
159
160         tpo_td043->vmirror = val;
161
162         return count;
163 }
164
165 static ssize_t tpo_td043_mode_show(struct device *dev,
166         struct device_attribute *attr, char *buf)
167 {
168         struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev);
169
170         return snprintf(buf, PAGE_SIZE, "%d\n", tpo_td043->mode);
171 }
172
173 static ssize_t tpo_td043_mode_store(struct device *dev,
174         struct device_attribute *attr, const char *buf, size_t count)
175 {
176         struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev);
177         long val;
178         int ret;
179
180         ret = kstrtol(buf, 0, &val);
181         if (ret != 0 || val & ~7)
182                 return -EINVAL;
183
184         tpo_td043->mode = val;
185
186         val |= TPO_R02_NCLK_RISING;
187         tpo_td043_write(tpo_td043->spi, 2, val);
188
189         return count;
190 }
191
192 static ssize_t tpo_td043_gamma_show(struct device *dev,
193         struct device_attribute *attr, char *buf)
194 {
195         struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev);
196         ssize_t len = 0;
197         int ret;
198         int i;
199
200         for (i = 0; i < ARRAY_SIZE(tpo_td043->gamma); i++) {
201                 ret = snprintf(buf + len, PAGE_SIZE - len, "%u ",
202                                 tpo_td043->gamma[i]);
203                 if (ret < 0)
204                         return ret;
205                 len += ret;
206         }
207         buf[len - 1] = '\n';
208
209         return len;
210 }
211
212 static ssize_t tpo_td043_gamma_store(struct device *dev,
213         struct device_attribute *attr, const char *buf, size_t count)
214 {
215         struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev);
216         unsigned int g[12];
217         int ret;
218         int i;
219
220         ret = sscanf(buf, "%u %u %u %u %u %u %u %u %u %u %u %u",
221                         &g[0], &g[1], &g[2], &g[3], &g[4], &g[5],
222                         &g[6], &g[7], &g[8], &g[9], &g[10], &g[11]);
223
224         if (ret != 12)
225                 return -EINVAL;
226
227         for (i = 0; i < 12; i++)
228                 tpo_td043->gamma[i] = g[i];
229
230         tpo_td043_write_gamma(tpo_td043->spi, tpo_td043->gamma);
231
232         return count;
233 }
234
235 static DEVICE_ATTR(vmirror, S_IRUGO | S_IWUSR,
236                 tpo_td043_vmirror_show, tpo_td043_vmirror_store);
237 static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR,
238                 tpo_td043_mode_show, tpo_td043_mode_store);
239 static DEVICE_ATTR(gamma, S_IRUGO | S_IWUSR,
240                 tpo_td043_gamma_show, tpo_td043_gamma_store);
241
242 static struct attribute *tpo_td043_attrs[] = {
243         &dev_attr_vmirror.attr,
244         &dev_attr_mode.attr,
245         &dev_attr_gamma.attr,
246         NULL,
247 };
248
249 static struct attribute_group tpo_td043_attr_group = {
250         .attrs = tpo_td043_attrs,
251 };
252
253 static const struct omap_video_timings tpo_td043_timings = {
254         .x_res          = 800,
255         .y_res          = 480,
256
257         .pixel_clock    = 36000,
258
259         .hsw            = 1,
260         .hfp            = 68,
261         .hbp            = 214,
262
263         .vsw            = 1,
264         .vfp            = 39,
265         .vbp            = 34,
266 };
267
268 static int tpo_td043_power_on(struct omap_dss_device *dssdev)
269 {
270         struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
271         int nreset_gpio = dssdev->reset_gpio;
272         int r;
273
274         if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
275                 return 0;
276
277         r = omapdss_dpi_display_enable(dssdev);
278         if (r)
279                 goto err0;
280
281         if (dssdev->platform_enable) {
282                 r = dssdev->platform_enable(dssdev);
283                 if (r)
284                         goto err1;
285         }
286
287         regulator_enable(tpo_td043->vcc_reg);
288
289         /* wait for power up */
290         msleep(160);
291
292         if (gpio_is_valid(nreset_gpio))
293                 gpio_set_value(nreset_gpio, 1);
294
295         tpo_td043_write(tpo_td043->spi, 2,
296                         TPO_R02_MODE(tpo_td043->mode) | TPO_R02_NCLK_RISING);
297         tpo_td043_write(tpo_td043->spi, 3, TPO_R03_VAL_NORMAL);
298         tpo_td043_write(tpo_td043->spi, 0x20, 0xf0);
299         tpo_td043_write(tpo_td043->spi, 0x21, 0xf0);
300         tpo_td043_write_mirror(tpo_td043->spi, tpo_td043->hmirror,
301                         tpo_td043->vmirror);
302         tpo_td043_write_gamma(tpo_td043->spi, tpo_td043->gamma);
303
304         return 0;
305 err1:
306         omapdss_dpi_display_disable(dssdev);
307 err0:
308         return r;
309 }
310
311 static void tpo_td043_power_off(struct omap_dss_device *dssdev)
312 {
313         struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
314         int nreset_gpio = dssdev->reset_gpio;
315
316         if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
317                 return;
318
319         tpo_td043_write(tpo_td043->spi, 3,
320                         TPO_R03_VAL_STANDBY | TPO_R03_EN_PWM);
321
322         if (gpio_is_valid(nreset_gpio))
323                 gpio_set_value(nreset_gpio, 0);
324
325         /* wait for at least 2 vsyncs before cutting off power */
326         msleep(50);
327
328         tpo_td043_write(tpo_td043->spi, 3, TPO_R03_VAL_STANDBY);
329
330         regulator_disable(tpo_td043->vcc_reg);
331
332         if (dssdev->platform_disable)
333                 dssdev->platform_disable(dssdev);
334
335         omapdss_dpi_display_disable(dssdev);
336 }
337
338 static int tpo_td043_enable(struct omap_dss_device *dssdev)
339 {
340         int ret;
341
342         dev_dbg(&dssdev->dev, "enable\n");
343
344         ret = tpo_td043_power_on(dssdev);
345         if (ret)
346                 return ret;
347
348         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
349
350         return 0;
351 }
352
353 static void tpo_td043_disable(struct omap_dss_device *dssdev)
354 {
355         dev_dbg(&dssdev->dev, "disable\n");
356
357         tpo_td043_power_off(dssdev);
358
359         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
360 }
361
362 static int tpo_td043_suspend(struct omap_dss_device *dssdev)
363 {
364         tpo_td043_power_off(dssdev);
365         dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
366         return 0;
367 }
368
369 static int tpo_td043_resume(struct omap_dss_device *dssdev)
370 {
371         int r = 0;
372
373         r = tpo_td043_power_on(dssdev);
374         if (r)
375                 return r;
376
377         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
378
379         return 0;
380 }
381
382 static int tpo_td043_probe(struct omap_dss_device *dssdev)
383 {
384         struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
385         int nreset_gpio = dssdev->reset_gpio;
386         int ret = 0;
387
388         dev_dbg(&dssdev->dev, "probe\n");
389
390         if (tpo_td043 == NULL) {
391                 dev_err(&dssdev->dev, "missing tpo_td043_device\n");
392                 return -ENODEV;
393         }
394
395         dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IHS |
396                                 OMAP_DSS_LCD_IVS | OMAP_DSS_LCD_IPC;
397         dssdev->panel.timings = tpo_td043_timings;
398         dssdev->ctrl.pixel_size = 24;
399
400         tpo_td043->mode = TPO_R02_MODE_800x480;
401         memcpy(tpo_td043->gamma, tpo_td043_def_gamma, sizeof(tpo_td043->gamma));
402
403         tpo_td043->vcc_reg = regulator_get(&dssdev->dev, "vcc");
404         if (IS_ERR(tpo_td043->vcc_reg)) {
405                 dev_err(&dssdev->dev, "failed to get LCD VCC regulator\n");
406                 ret = PTR_ERR(tpo_td043->vcc_reg);
407                 goto fail_regulator;
408         }
409
410         if (gpio_is_valid(nreset_gpio)) {
411                 ret = gpio_request(nreset_gpio, "lcd reset");
412                 if (ret < 0) {
413                         dev_err(&dssdev->dev, "couldn't request reset GPIO\n");
414                         goto fail_gpio_req;
415                 }
416
417                 ret = gpio_direction_output(nreset_gpio, 0);
418                 if (ret < 0) {
419                         dev_err(&dssdev->dev, "couldn't set GPIO direction\n");
420                         goto fail_gpio_direction;
421                 }
422         }
423
424         ret = sysfs_create_group(&dssdev->dev.kobj, &tpo_td043_attr_group);
425         if (ret)
426                 dev_warn(&dssdev->dev, "failed to create sysfs files\n");
427
428         return 0;
429
430 fail_gpio_direction:
431         gpio_free(nreset_gpio);
432 fail_gpio_req:
433         regulator_put(tpo_td043->vcc_reg);
434 fail_regulator:
435         kfree(tpo_td043);
436         return ret;
437 }
438
439 static void tpo_td043_remove(struct omap_dss_device *dssdev)
440 {
441         struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev);
442         int nreset_gpio = dssdev->reset_gpio;
443
444         dev_dbg(&dssdev->dev, "remove\n");
445
446         sysfs_remove_group(&dssdev->dev.kobj, &tpo_td043_attr_group);
447         regulator_put(tpo_td043->vcc_reg);
448         if (gpio_is_valid(nreset_gpio))
449                 gpio_free(nreset_gpio);
450 }
451
452 static struct omap_dss_driver tpo_td043_driver = {
453         .probe          = tpo_td043_probe,
454         .remove         = tpo_td043_remove,
455
456         .enable         = tpo_td043_enable,
457         .disable        = tpo_td043_disable,
458         .suspend        = tpo_td043_suspend,
459         .resume         = tpo_td043_resume,
460         .set_mirror     = tpo_td043_set_hmirror,
461         .get_mirror     = tpo_td043_get_hmirror,
462
463         .driver         = {
464                 .name   = "tpo_td043mtea1_panel",
465                 .owner  = THIS_MODULE,
466         },
467 };
468
469 static int tpo_td043_spi_probe(struct spi_device *spi)
470 {
471         struct omap_dss_device *dssdev = spi->dev.platform_data;
472         struct tpo_td043_device *tpo_td043;
473         int ret;
474
475         if (dssdev == NULL) {
476                 dev_err(&spi->dev, "missing dssdev\n");
477                 return -ENODEV;
478         }
479
480         spi->bits_per_word = 16;
481         spi->mode = SPI_MODE_0;
482
483         ret = spi_setup(spi);
484         if (ret < 0) {
485                 dev_err(&spi->dev, "spi_setup failed: %d\n", ret);
486                 return ret;
487         }
488
489         tpo_td043 = kzalloc(sizeof(*tpo_td043), GFP_KERNEL);
490         if (tpo_td043 == NULL)
491                 return -ENOMEM;
492
493         tpo_td043->spi = spi;
494         dev_set_drvdata(&spi->dev, tpo_td043);
495         dev_set_drvdata(&dssdev->dev, tpo_td043);
496
497         omap_dss_register_driver(&tpo_td043_driver);
498
499         return 0;
500 }
501
502 static int __devexit tpo_td043_spi_remove(struct spi_device *spi)
503 {
504         struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&spi->dev);
505
506         omap_dss_unregister_driver(&tpo_td043_driver);
507         kfree(tpo_td043);
508
509         return 0;
510 }
511
512 static struct spi_driver tpo_td043_spi_driver = {
513         .driver = {
514                 .name   = "tpo_td043mtea1_panel_spi",
515                 .bus    = &spi_bus_type,
516                 .owner  = THIS_MODULE,
517         },
518         .probe  = tpo_td043_spi_probe,
519         .remove = __devexit_p(tpo_td043_spi_remove),
520 };
521
522 static int __init tpo_td043_init(void)
523 {
524         return spi_register_driver(&tpo_td043_spi_driver);
525 }
526
527 static void __exit tpo_td043_exit(void)
528 {
529         spi_unregister_driver(&tpo_td043_spi_driver);
530 }
531
532 module_init(tpo_td043_init);
533 module_exit(tpo_td043_exit);
534
535 MODULE_AUTHOR("Gražvydas Ignotas <notasas@gmail.com>");
536 MODULE_DESCRIPTION("TPO TD043MTEA1 LCD Driver");
537 MODULE_LICENSE("GPL");