Commit | Line | Data |
---|---|---|
9ce4ad0a GI |
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> | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
9ce4ad0a GI |
19 | |
20 | #include <plat/display.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 | long val; | |
148 | int ret; | |
149 | ||
150 | ret = strict_strtol(buf, 0, &val); | |
151 | if (ret < 0) | |
152 | return ret; | |
153 | ||
154 | ret = tpo_td043_write_mirror(tpo_td043->spi, tpo_td043->hmirror, val); | |
155 | if (ret < 0) | |
156 | return ret; | |
157 | ||
158 | tpo_td043->vmirror = val; | |
159 | ||
160 | return count; | |
161 | } | |
162 | ||
163 | static ssize_t tpo_td043_mode_show(struct device *dev, | |
164 | struct device_attribute *attr, char *buf) | |
165 | { | |
166 | struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev); | |
167 | ||
168 | return snprintf(buf, PAGE_SIZE, "%d\n", tpo_td043->mode); | |
169 | } | |
170 | ||
171 | static ssize_t tpo_td043_mode_store(struct device *dev, | |
172 | struct device_attribute *attr, const char *buf, size_t count) | |
173 | { | |
174 | struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev); | |
175 | long val; | |
176 | int ret; | |
177 | ||
178 | ret = strict_strtol(buf, 0, &val); | |
179 | if (ret != 0 || val & ~7) | |
180 | return -EINVAL; | |
181 | ||
182 | tpo_td043->mode = val; | |
183 | ||
184 | val |= TPO_R02_NCLK_RISING; | |
185 | tpo_td043_write(tpo_td043->spi, 2, val); | |
186 | ||
187 | return count; | |
188 | } | |
189 | ||
190 | static ssize_t tpo_td043_gamma_show(struct device *dev, | |
191 | struct device_attribute *attr, char *buf) | |
192 | { | |
193 | struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev); | |
194 | ssize_t len = 0; | |
195 | int ret; | |
196 | int i; | |
197 | ||
198 | for (i = 0; i < ARRAY_SIZE(tpo_td043->gamma); i++) { | |
199 | ret = snprintf(buf + len, PAGE_SIZE - len, "%u ", | |
200 | tpo_td043->gamma[i]); | |
201 | if (ret < 0) | |
202 | return ret; | |
203 | len += ret; | |
204 | } | |
205 | buf[len - 1] = '\n'; | |
206 | ||
207 | return len; | |
208 | } | |
209 | ||
210 | static ssize_t tpo_td043_gamma_store(struct device *dev, | |
211 | struct device_attribute *attr, const char *buf, size_t count) | |
212 | { | |
213 | struct tpo_td043_device *tpo_td043 = dev_get_drvdata(dev); | |
214 | unsigned int g[12]; | |
215 | int ret; | |
216 | int i; | |
217 | ||
218 | ret = sscanf(buf, "%u %u %u %u %u %u %u %u %u %u %u %u", | |
219 | &g[0], &g[1], &g[2], &g[3], &g[4], &g[5], | |
220 | &g[6], &g[7], &g[8], &g[9], &g[10], &g[11]); | |
221 | ||
222 | if (ret != 12) | |
223 | return -EINVAL; | |
224 | ||
225 | for (i = 0; i < 12; i++) | |
226 | tpo_td043->gamma[i] = g[i]; | |
227 | ||
228 | tpo_td043_write_gamma(tpo_td043->spi, tpo_td043->gamma); | |
229 | ||
230 | return count; | |
231 | } | |
232 | ||
233 | static DEVICE_ATTR(vmirror, S_IRUGO | S_IWUSR, | |
234 | tpo_td043_vmirror_show, tpo_td043_vmirror_store); | |
235 | static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, | |
236 | tpo_td043_mode_show, tpo_td043_mode_store); | |
237 | static DEVICE_ATTR(gamma, S_IRUGO | S_IWUSR, | |
238 | tpo_td043_gamma_show, tpo_td043_gamma_store); | |
239 | ||
240 | static struct attribute *tpo_td043_attrs[] = { | |
241 | &dev_attr_vmirror.attr, | |
242 | &dev_attr_mode.attr, | |
243 | &dev_attr_gamma.attr, | |
244 | NULL, | |
245 | }; | |
246 | ||
247 | static struct attribute_group tpo_td043_attr_group = { | |
248 | .attrs = tpo_td043_attrs, | |
249 | }; | |
250 | ||
251 | static const struct omap_video_timings tpo_td043_timings = { | |
252 | .x_res = 800, | |
253 | .y_res = 480, | |
254 | ||
255 | .pixel_clock = 36000, | |
256 | ||
257 | .hsw = 1, | |
258 | .hfp = 68, | |
259 | .hbp = 214, | |
260 | ||
261 | .vsw = 1, | |
262 | .vfp = 39, | |
263 | .vbp = 34, | |
264 | }; | |
265 | ||
60684754 | 266 | static int tpo_td043_power_on(struct omap_dss_device *dssdev) |
9ce4ad0a GI |
267 | { |
268 | struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev); | |
269 | int nreset_gpio = dssdev->reset_gpio; | |
37ac60e4 | 270 | int r; |
9ce4ad0a | 271 | |
37ac60e4 TV |
272 | r = omapdss_dpi_display_enable(dssdev); |
273 | if (r) | |
274 | goto err0; | |
9ce4ad0a GI |
275 | |
276 | if (dssdev->platform_enable) { | |
37ac60e4 TV |
277 | r = dssdev->platform_enable(dssdev); |
278 | if (r) | |
279 | goto err1; | |
9ce4ad0a GI |
280 | } |
281 | ||
282 | regulator_enable(tpo_td043->vcc_reg); | |
283 | ||
284 | /* wait for power up */ | |
285 | msleep(160); | |
286 | ||
287 | if (gpio_is_valid(nreset_gpio)) | |
288 | gpio_set_value(nreset_gpio, 1); | |
289 | ||
290 | tpo_td043_write(tpo_td043->spi, 2, | |
291 | TPO_R02_MODE(tpo_td043->mode) | TPO_R02_NCLK_RISING); | |
292 | tpo_td043_write(tpo_td043->spi, 3, TPO_R03_VAL_NORMAL); | |
293 | tpo_td043_write(tpo_td043->spi, 0x20, 0xf0); | |
294 | tpo_td043_write(tpo_td043->spi, 0x21, 0xf0); | |
295 | tpo_td043_write_mirror(tpo_td043->spi, tpo_td043->hmirror, | |
296 | tpo_td043->vmirror); | |
297 | tpo_td043_write_gamma(tpo_td043->spi, tpo_td043->gamma); | |
298 | ||
299 | return 0; | |
37ac60e4 TV |
300 | err1: |
301 | omapdss_dpi_display_disable(dssdev); | |
302 | err0: | |
303 | return r; | |
9ce4ad0a GI |
304 | } |
305 | ||
60684754 | 306 | static void tpo_td043_power_off(struct omap_dss_device *dssdev) |
9ce4ad0a GI |
307 | { |
308 | struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev); | |
309 | int nreset_gpio = dssdev->reset_gpio; | |
310 | ||
9ce4ad0a GI |
311 | tpo_td043_write(tpo_td043->spi, 3, |
312 | TPO_R03_VAL_STANDBY | TPO_R03_EN_PWM); | |
313 | ||
314 | if (gpio_is_valid(nreset_gpio)) | |
315 | gpio_set_value(nreset_gpio, 0); | |
316 | ||
317 | /* wait for at least 2 vsyncs before cutting off power */ | |
318 | msleep(50); | |
319 | ||
320 | tpo_td043_write(tpo_td043->spi, 3, TPO_R03_VAL_STANDBY); | |
321 | ||
322 | regulator_disable(tpo_td043->vcc_reg); | |
323 | ||
324 | if (dssdev->platform_disable) | |
325 | dssdev->platform_disable(dssdev); | |
37ac60e4 TV |
326 | |
327 | omapdss_dpi_display_disable(dssdev); | |
328 | } | |
329 | ||
330 | static int tpo_td043_enable(struct omap_dss_device *dssdev) | |
331 | { | |
332 | int ret; | |
333 | ||
334 | dev_dbg(&dssdev->dev, "enable\n"); | |
335 | ||
60684754 | 336 | ret = tpo_td043_power_on(dssdev); |
37ac60e4 TV |
337 | if (ret) |
338 | return ret; | |
339 | ||
340 | dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; | |
341 | ||
342 | return 0; | |
343 | } | |
344 | ||
345 | static void tpo_td043_disable(struct omap_dss_device *dssdev) | |
346 | { | |
347 | dev_dbg(&dssdev->dev, "disable\n"); | |
348 | ||
60684754 | 349 | tpo_td043_power_off(dssdev); |
37ac60e4 TV |
350 | |
351 | dssdev->state = OMAP_DSS_DISPLAY_DISABLED; | |
9ce4ad0a GI |
352 | } |
353 | ||
354 | static int tpo_td043_suspend(struct omap_dss_device *dssdev) | |
355 | { | |
60684754 | 356 | tpo_td043_power_off(dssdev); |
37ac60e4 | 357 | dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED; |
9ce4ad0a GI |
358 | return 0; |
359 | } | |
360 | ||
361 | static int tpo_td043_resume(struct omap_dss_device *dssdev) | |
362 | { | |
37ac60e4 TV |
363 | int r = 0; |
364 | ||
60684754 | 365 | r = tpo_td043_power_on(dssdev); |
37ac60e4 TV |
366 | if (r) |
367 | return r; | |
368 | ||
369 | dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; | |
370 | ||
371 | return 0; | |
9ce4ad0a GI |
372 | } |
373 | ||
374 | static int tpo_td043_probe(struct omap_dss_device *dssdev) | |
375 | { | |
376 | struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev); | |
377 | int nreset_gpio = dssdev->reset_gpio; | |
378 | int ret = 0; | |
379 | ||
380 | dev_dbg(&dssdev->dev, "probe\n"); | |
381 | ||
382 | if (tpo_td043 == NULL) { | |
383 | dev_err(&dssdev->dev, "missing tpo_td043_device\n"); | |
384 | return -ENODEV; | |
385 | } | |
386 | ||
387 | dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IHS | | |
388 | OMAP_DSS_LCD_IVS | OMAP_DSS_LCD_IPC; | |
389 | dssdev->panel.timings = tpo_td043_timings; | |
390 | dssdev->ctrl.pixel_size = 24; | |
391 | ||
392 | tpo_td043->mode = TPO_R02_MODE_800x480; | |
393 | memcpy(tpo_td043->gamma, tpo_td043_def_gamma, sizeof(tpo_td043->gamma)); | |
394 | ||
395 | tpo_td043->vcc_reg = regulator_get(&dssdev->dev, "vcc"); | |
396 | if (IS_ERR(tpo_td043->vcc_reg)) { | |
397 | dev_err(&dssdev->dev, "failed to get LCD VCC regulator\n"); | |
398 | ret = PTR_ERR(tpo_td043->vcc_reg); | |
399 | goto fail_regulator; | |
400 | } | |
401 | ||
402 | if (gpio_is_valid(nreset_gpio)) { | |
403 | ret = gpio_request(nreset_gpio, "lcd reset"); | |
404 | if (ret < 0) { | |
405 | dev_err(&dssdev->dev, "couldn't request reset GPIO\n"); | |
406 | goto fail_gpio_req; | |
407 | } | |
408 | ||
409 | ret = gpio_direction_output(nreset_gpio, 0); | |
410 | if (ret < 0) { | |
411 | dev_err(&dssdev->dev, "couldn't set GPIO direction\n"); | |
412 | goto fail_gpio_direction; | |
413 | } | |
414 | } | |
415 | ||
416 | ret = sysfs_create_group(&dssdev->dev.kobj, &tpo_td043_attr_group); | |
417 | if (ret) | |
418 | dev_warn(&dssdev->dev, "failed to create sysfs files\n"); | |
419 | ||
420 | return 0; | |
421 | ||
422 | fail_gpio_direction: | |
423 | gpio_free(nreset_gpio); | |
424 | fail_gpio_req: | |
425 | regulator_put(tpo_td043->vcc_reg); | |
426 | fail_regulator: | |
427 | kfree(tpo_td043); | |
428 | return ret; | |
429 | } | |
430 | ||
431 | static void tpo_td043_remove(struct omap_dss_device *dssdev) | |
432 | { | |
433 | struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&dssdev->dev); | |
434 | int nreset_gpio = dssdev->reset_gpio; | |
435 | ||
436 | dev_dbg(&dssdev->dev, "remove\n"); | |
437 | ||
438 | sysfs_remove_group(&dssdev->dev.kobj, &tpo_td043_attr_group); | |
439 | regulator_put(tpo_td043->vcc_reg); | |
440 | if (gpio_is_valid(nreset_gpio)) | |
441 | gpio_free(nreset_gpio); | |
442 | } | |
443 | ||
444 | static struct omap_dss_driver tpo_td043_driver = { | |
445 | .probe = tpo_td043_probe, | |
446 | .remove = tpo_td043_remove, | |
447 | ||
448 | .enable = tpo_td043_enable, | |
449 | .disable = tpo_td043_disable, | |
450 | .suspend = tpo_td043_suspend, | |
451 | .resume = tpo_td043_resume, | |
452 | .set_mirror = tpo_td043_set_hmirror, | |
453 | .get_mirror = tpo_td043_get_hmirror, | |
454 | ||
455 | .driver = { | |
456 | .name = "tpo_td043mtea1_panel", | |
457 | .owner = THIS_MODULE, | |
458 | }, | |
459 | }; | |
460 | ||
461 | static int tpo_td043_spi_probe(struct spi_device *spi) | |
462 | { | |
463 | struct omap_dss_device *dssdev = spi->dev.platform_data; | |
464 | struct tpo_td043_device *tpo_td043; | |
465 | int ret; | |
466 | ||
467 | if (dssdev == NULL) { | |
468 | dev_err(&spi->dev, "missing dssdev\n"); | |
469 | return -ENODEV; | |
470 | } | |
471 | ||
472 | spi->bits_per_word = 16; | |
473 | spi->mode = SPI_MODE_0; | |
474 | ||
475 | ret = spi_setup(spi); | |
476 | if (ret < 0) { | |
477 | dev_err(&spi->dev, "spi_setup failed: %d\n", ret); | |
478 | return ret; | |
479 | } | |
480 | ||
481 | tpo_td043 = kzalloc(sizeof(*tpo_td043), GFP_KERNEL); | |
482 | if (tpo_td043 == NULL) | |
483 | return -ENOMEM; | |
484 | ||
485 | tpo_td043->spi = spi; | |
486 | dev_set_drvdata(&spi->dev, tpo_td043); | |
487 | dev_set_drvdata(&dssdev->dev, tpo_td043); | |
488 | ||
489 | omap_dss_register_driver(&tpo_td043_driver); | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
494 | static int __devexit tpo_td043_spi_remove(struct spi_device *spi) | |
495 | { | |
496 | struct tpo_td043_device *tpo_td043 = dev_get_drvdata(&spi->dev); | |
497 | ||
498 | omap_dss_unregister_driver(&tpo_td043_driver); | |
499 | kfree(tpo_td043); | |
500 | ||
501 | return 0; | |
502 | } | |
503 | ||
504 | static struct spi_driver tpo_td043_spi_driver = { | |
505 | .driver = { | |
506 | .name = "tpo_td043mtea1_panel_spi", | |
507 | .bus = &spi_bus_type, | |
508 | .owner = THIS_MODULE, | |
509 | }, | |
510 | .probe = tpo_td043_spi_probe, | |
511 | .remove = __devexit_p(tpo_td043_spi_remove), | |
512 | }; | |
513 | ||
514 | static int __init tpo_td043_init(void) | |
515 | { | |
516 | return spi_register_driver(&tpo_td043_spi_driver); | |
517 | } | |
518 | ||
519 | static void __exit tpo_td043_exit(void) | |
520 | { | |
521 | spi_unregister_driver(&tpo_td043_spi_driver); | |
522 | } | |
523 | ||
524 | module_init(tpo_td043_init); | |
525 | module_exit(tpo_td043_exit); | |
526 | ||
527 | MODULE_AUTHOR("Gražvydas Ignotas <notasas@gmail.com>"); | |
528 | MODULE_DESCRIPTION("TPO TD043MTEA1 LCD Driver"); | |
529 | MODULE_LICENSE("GPL"); |