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1 | /* |
2 | * Common code for AUO-K190X framebuffer drivers |
3 | * |
4 | * Copyright (C) 2012 Heiko Stuebner <heiko@sntech.de> |
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 version 2 as |
8 | * published by the Free Software Foundation. |
9 | */ |
10 | |
11 | #include <linux/module.h> |
12 | #include <linux/kernel.h> |
13 | #include <linux/gpio.h> |
14 | #include <linux/platform_device.h> |
15 | #include <linux/pm_runtime.h> |
16 | #include <linux/fb.h> |
17 | #include <linux/delay.h> |
18 | #include <linux/uaccess.h> |
19 | #include <linux/vmalloc.h> |
20 | #include <linux/regulator/consumer.h> |
21 | |
22 | #include <video/auo_k190xfb.h> |
23 | |
24 | #include "auo_k190x.h" |
25 | |
26 | struct panel_info { |
27 | int w; |
28 | int h; |
29 | }; |
30 | |
31 | /* table of panel specific parameters to be indexed into by the board drivers */ |
32 | static struct panel_info panel_table[] = { |
33 | /* standard 6" */ |
34 | [AUOK190X_RESOLUTION_800_600] = { |
35 | .w = 800, |
36 | .h = 600, |
37 | }, |
38 | /* standard 9" */ |
39 | [AUOK190X_RESOLUTION_1024_768] = { |
40 | .w = 1024, |
41 | .h = 768, |
42 | }, |
43 | }; |
44 | |
45 | /* |
46 | * private I80 interface to the board driver |
47 | */ |
48 | |
49 | static void auok190x_issue_data(struct auok190xfb_par *par, u16 data) |
50 | { |
51 | par->board->set_ctl(par, AUOK190X_I80_WR, 0); |
52 | par->board->set_hdb(par, data); |
53 | par->board->set_ctl(par, AUOK190X_I80_WR, 1); |
54 | } |
55 | |
56 | static void auok190x_issue_cmd(struct auok190xfb_par *par, u16 data) |
57 | { |
58 | par->board->set_ctl(par, AUOK190X_I80_DC, 0); |
59 | auok190x_issue_data(par, data); |
60 | par->board->set_ctl(par, AUOK190X_I80_DC, 1); |
61 | } |
62 | |
63 | static int auok190x_issue_pixels(struct auok190xfb_par *par, int size, |
64 | u16 *data) |
65 | { |
66 | struct device *dev = par->info->device; |
67 | int i; |
68 | u16 tmp; |
69 | |
70 | if (size & 3) { |
71 | dev_err(dev, "issue_pixels: size %d must be a multiple of 4\n", |
72 | size); |
73 | return -EINVAL; |
74 | } |
75 | |
76 | for (i = 0; i < (size >> 1); i++) { |
77 | par->board->set_ctl(par, AUOK190X_I80_WR, 0); |
78 | |
79 | /* simple reduction of 8bit staticgray to 4bit gray |
80 | * combines 4 * 4bit pixel values into a 16bit value |
81 | */ |
82 | tmp = (data[2*i] & 0xF0) >> 4; |
83 | tmp |= (data[2*i] & 0xF000) >> 8; |
84 | tmp |= (data[2*i+1] & 0xF0) << 4; |
85 | tmp |= (data[2*i+1] & 0xF000); |
86 | |
87 | par->board->set_hdb(par, tmp); |
88 | par->board->set_ctl(par, AUOK190X_I80_WR, 1); |
89 | } |
90 | |
91 | return 0; |
92 | } |
93 | |
94 | static u16 auok190x_read_data(struct auok190xfb_par *par) |
95 | { |
96 | u16 data; |
97 | |
98 | par->board->set_ctl(par, AUOK190X_I80_OE, 0); |
99 | data = par->board->get_hdb(par); |
100 | par->board->set_ctl(par, AUOK190X_I80_OE, 1); |
101 | |
102 | return data; |
103 | } |
104 | |
105 | /* |
106 | * Command interface for the controller drivers |
107 | */ |
108 | |
109 | void auok190x_send_command_nowait(struct auok190xfb_par *par, u16 data) |
110 | { |
111 | par->board->set_ctl(par, AUOK190X_I80_CS, 0); |
112 | auok190x_issue_cmd(par, data); |
113 | par->board->set_ctl(par, AUOK190X_I80_CS, 1); |
114 | } |
115 | EXPORT_SYMBOL_GPL(auok190x_send_command_nowait); |
116 | |
117 | void auok190x_send_cmdargs_nowait(struct auok190xfb_par *par, u16 cmd, |
118 | int argc, u16 *argv) |
119 | { |
120 | int i; |
121 | |
122 | par->board->set_ctl(par, AUOK190X_I80_CS, 0); |
123 | auok190x_issue_cmd(par, cmd); |
124 | |
125 | for (i = 0; i < argc; i++) |
126 | auok190x_issue_data(par, argv[i]); |
127 | par->board->set_ctl(par, AUOK190X_I80_CS, 1); |
128 | } |
129 | EXPORT_SYMBOL_GPL(auok190x_send_cmdargs_nowait); |
130 | |
131 | int auok190x_send_command(struct auok190xfb_par *par, u16 data) |
132 | { |
133 | int ret; |
134 | |
135 | ret = par->board->wait_for_rdy(par); |
136 | if (ret) |
137 | return ret; |
138 | |
139 | auok190x_send_command_nowait(par, data); |
140 | return 0; |
141 | } |
142 | EXPORT_SYMBOL_GPL(auok190x_send_command); |
143 | |
144 | int auok190x_send_cmdargs(struct auok190xfb_par *par, u16 cmd, |
145 | int argc, u16 *argv) |
146 | { |
147 | int ret; |
148 | |
149 | ret = par->board->wait_for_rdy(par); |
150 | if (ret) |
151 | return ret; |
152 | |
153 | auok190x_send_cmdargs_nowait(par, cmd, argc, argv); |
154 | return 0; |
155 | } |
156 | EXPORT_SYMBOL_GPL(auok190x_send_cmdargs); |
157 | |
158 | int auok190x_read_cmdargs(struct auok190xfb_par *par, u16 cmd, |
159 | int argc, u16 *argv) |
160 | { |
161 | int i, ret; |
162 | |
163 | ret = par->board->wait_for_rdy(par); |
164 | if (ret) |
165 | return ret; |
166 | |
167 | par->board->set_ctl(par, AUOK190X_I80_CS, 0); |
168 | auok190x_issue_cmd(par, cmd); |
169 | |
170 | for (i = 0; i < argc; i++) |
171 | argv[i] = auok190x_read_data(par); |
172 | par->board->set_ctl(par, AUOK190X_I80_CS, 1); |
173 | |
174 | return 0; |
175 | } |
176 | EXPORT_SYMBOL_GPL(auok190x_read_cmdargs); |
177 | |
178 | void auok190x_send_cmdargs_pixels_nowait(struct auok190xfb_par *par, u16 cmd, |
179 | int argc, u16 *argv, int size, u16 *data) |
180 | { |
181 | int i; |
182 | |
183 | par->board->set_ctl(par, AUOK190X_I80_CS, 0); |
184 | |
185 | auok190x_issue_cmd(par, cmd); |
186 | |
187 | for (i = 0; i < argc; i++) |
188 | auok190x_issue_data(par, argv[i]); |
189 | |
190 | auok190x_issue_pixels(par, size, data); |
191 | |
192 | par->board->set_ctl(par, AUOK190X_I80_CS, 1); |
193 | } |
194 | EXPORT_SYMBOL_GPL(auok190x_send_cmdargs_pixels_nowait); |
195 | |
196 | int auok190x_send_cmdargs_pixels(struct auok190xfb_par *par, u16 cmd, |
197 | int argc, u16 *argv, int size, u16 *data) |
198 | { |
199 | int ret; |
200 | |
201 | ret = par->board->wait_for_rdy(par); |
202 | if (ret) |
203 | return ret; |
204 | |
205 | auok190x_send_cmdargs_pixels_nowait(par, cmd, argc, argv, size, data); |
206 | |
207 | return 0; |
208 | } |
209 | EXPORT_SYMBOL_GPL(auok190x_send_cmdargs_pixels); |
210 | |
211 | /* |
212 | * fbdefio callbacks - common on both controllers. |
213 | */ |
214 | |
215 | static void auok190xfb_dpy_first_io(struct fb_info *info) |
216 | { |
217 | /* tell runtime-pm that we wish to use the device in a short time */ |
218 | pm_runtime_get(info->device); |
219 | } |
220 | |
221 | /* this is called back from the deferred io workqueue */ |
222 | static void auok190xfb_dpy_deferred_io(struct fb_info *info, |
223 | struct list_head *pagelist) |
224 | { |
225 | struct fb_deferred_io *fbdefio = info->fbdefio; |
226 | struct auok190xfb_par *par = info->par; |
227 | u16 yres = info->var.yres; |
228 | u16 xres = info->var.xres; |
229 | u16 y1 = 0, h = 0; |
230 | int prev_index = -1; |
231 | struct page *cur; |
232 | int h_inc; |
233 | int threshold; |
234 | |
235 | if (!list_empty(pagelist)) |
236 | /* the device resume should've been requested through first_io, |
237 | * if the resume did not finish until now, wait for it. |
238 | */ |
239 | pm_runtime_barrier(info->device); |
240 | else |
241 | /* We reached this via the fsync or some other way. |
242 | * In either case the first_io function did not run, |
243 | * so we runtime_resume the device here synchronously. |
244 | */ |
245 | pm_runtime_get_sync(info->device); |
246 | |
247 | /* Do a full screen update every n updates to prevent |
248 | * excessive darkening of the Sipix display. |
249 | * If we do this, there is no need to walk the pages. |
250 | */ |
251 | if (par->need_refresh(par)) { |
252 | par->update_all(par); |
253 | goto out; |
254 | } |
255 | |
256 | /* height increment is fixed per page */ |
257 | h_inc = DIV_ROUND_UP(PAGE_SIZE , xres); |
258 | |
259 | /* calculate number of pages from pixel height */ |
260 | threshold = par->consecutive_threshold / h_inc; |
261 | if (threshold < 1) |
262 | threshold = 1; |
263 | |
264 | /* walk the written page list and swizzle the data */ |
265 | list_for_each_entry(cur, &fbdefio->pagelist, lru) { |
266 | if (prev_index < 0) { |
267 | /* just starting so assign first page */ |
268 | y1 = (cur->index << PAGE_SHIFT) / xres; |
269 | h = h_inc; |
270 | } else if ((cur->index - prev_index) <= threshold) { |
271 | /* page is within our threshold for single updates */ |
272 | h += h_inc * (cur->index - prev_index); |
273 | } else { |
274 | /* page not consecutive, issue previous update first */ |
275 | par->update_partial(par, y1, y1 + h); |
276 | |
277 | /* start over with our non consecutive page */ |
278 | y1 = (cur->index << PAGE_SHIFT) / xres; |
279 | h = h_inc; |
280 | } |
281 | prev_index = cur->index; |
282 | } |
283 | |
284 | /* if we still have any pages to update we do so now */ |
285 | if (h >= yres) |
286 | /* its a full screen update, just do it */ |
287 | par->update_all(par); |
288 | else |
289 | par->update_partial(par, y1, min((u16) (y1 + h), yres)); |
290 | |
291 | out: |
292 | pm_runtime_mark_last_busy(info->device); |
293 | pm_runtime_put_autosuspend(info->device); |
294 | } |
295 | |
296 | /* |
297 | * framebuffer operations |
298 | */ |
299 | |
300 | /* |
301 | * this is the slow path from userspace. they can seek and write to |
302 | * the fb. it's inefficient to do anything less than a full screen draw |
303 | */ |
304 | static ssize_t auok190xfb_write(struct fb_info *info, const char __user *buf, |
305 | size_t count, loff_t *ppos) |
306 | { |
307 | struct auok190xfb_par *par = info->par; |
308 | unsigned long p = *ppos; |
309 | void *dst; |
310 | int err = 0; |
311 | unsigned long total_size; |
312 | |
313 | if (info->state != FBINFO_STATE_RUNNING) |
314 | return -EPERM; |
315 | |
316 | total_size = info->fix.smem_len; |
317 | |
318 | if (p > total_size) |
319 | return -EFBIG; |
320 | |
321 | if (count > total_size) { |
322 | err = -EFBIG; |
323 | count = total_size; |
324 | } |
325 | |
326 | if (count + p > total_size) { |
327 | if (!err) |
328 | err = -ENOSPC; |
329 | |
330 | count = total_size - p; |
331 | } |
332 | |
333 | dst = (void *)(info->screen_base + p); |
334 | |
335 | if (copy_from_user(dst, buf, count)) |
336 | err = -EFAULT; |
337 | |
338 | if (!err) |
339 | *ppos += count; |
340 | |
341 | par->update_all(par); |
342 | |
343 | return (err) ? err : count; |
344 | } |
345 | |
346 | static void auok190xfb_fillrect(struct fb_info *info, |
347 | const struct fb_fillrect *rect) |
348 | { |
349 | struct auok190xfb_par *par = info->par; |
350 | |
351 | sys_fillrect(info, rect); |
352 | |
353 | par->update_all(par); |
354 | } |
355 | |
356 | static void auok190xfb_copyarea(struct fb_info *info, |
357 | const struct fb_copyarea *area) |
358 | { |
359 | struct auok190xfb_par *par = info->par; |
360 | |
361 | sys_copyarea(info, area); |
362 | |
363 | par->update_all(par); |
364 | } |
365 | |
366 | static void auok190xfb_imageblit(struct fb_info *info, |
367 | const struct fb_image *image) |
368 | { |
369 | struct auok190xfb_par *par = info->par; |
370 | |
371 | sys_imageblit(info, image); |
372 | |
373 | par->update_all(par); |
374 | } |
375 | |
376 | static int auok190xfb_check_var(struct fb_var_screeninfo *var, |
377 | struct fb_info *info) |
378 | { |
379 | if (info->var.xres != var->xres || info->var.yres != var->yres || |
380 | info->var.xres_virtual != var->xres_virtual || |
381 | info->var.yres_virtual != var->yres_virtual) { |
382 | pr_info("%s: Resolution not supported: X%u x Y%u\n", |
383 | __func__, var->xres, var->yres); |
384 | return -EINVAL; |
385 | } |
386 | |
387 | /* |
388 | * Memory limit |
389 | */ |
390 | |
391 | if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) { |
392 | pr_info("%s: Memory Limit requested yres_virtual = %u\n", |
393 | __func__, var->yres_virtual); |
394 | return -ENOMEM; |
395 | } |
396 | |
397 | return 0; |
398 | } |
399 | |
400 | static struct fb_ops auok190xfb_ops = { |
401 | .owner = THIS_MODULE, |
402 | .fb_read = fb_sys_read, |
403 | .fb_write = auok190xfb_write, |
404 | .fb_fillrect = auok190xfb_fillrect, |
405 | .fb_copyarea = auok190xfb_copyarea, |
406 | .fb_imageblit = auok190xfb_imageblit, |
407 | .fb_check_var = auok190xfb_check_var, |
408 | }; |
409 | |
410 | /* |
411 | * Controller-functions common to both K1900 and K1901 |
412 | */ |
413 | |
414 | static int auok190x_read_temperature(struct auok190xfb_par *par) |
415 | { |
416 | struct device *dev = par->info->device; |
417 | u16 data[4]; |
418 | int temp; |
419 | |
420 | pm_runtime_get_sync(dev); |
421 | |
422 | mutex_lock(&(par->io_lock)); |
423 | |
424 | auok190x_read_cmdargs(par, AUOK190X_CMD_READ_VERSION, 4, data); |
425 | |
426 | mutex_unlock(&(par->io_lock)); |
427 | |
428 | pm_runtime_mark_last_busy(dev); |
429 | pm_runtime_put_autosuspend(dev); |
430 | |
431 | /* sanitize and split of half-degrees for now */ |
432 | temp = ((data[0] & AUOK190X_VERSION_TEMP_MASK) >> 1); |
433 | |
434 | /* handle positive and negative temperatures */ |
435 | if (temp >= 201) |
436 | return (255 - temp + 1) * (-1); |
437 | else |
438 | return temp; |
439 | } |
440 | |
441 | static void auok190x_identify(struct auok190xfb_par *par) |
442 | { |
443 | struct device *dev = par->info->device; |
444 | u16 data[4]; |
445 | |
446 | pm_runtime_get_sync(dev); |
447 | |
448 | mutex_lock(&(par->io_lock)); |
449 | |
450 | auok190x_read_cmdargs(par, AUOK190X_CMD_READ_VERSION, 4, data); |
451 | |
452 | mutex_unlock(&(par->io_lock)); |
453 | |
454 | par->epd_type = data[1] & AUOK190X_VERSION_TEMP_MASK; |
455 | |
456 | par->panel_size_int = AUOK190X_VERSION_SIZE_INT(data[2]); |
457 | par->panel_size_float = AUOK190X_VERSION_SIZE_FLOAT(data[2]); |
458 | par->panel_model = AUOK190X_VERSION_MODEL(data[2]); |
459 | |
460 | par->tcon_version = AUOK190X_VERSION_TCON(data[3]); |
461 | par->lut_version = AUOK190X_VERSION_LUT(data[3]); |
462 | |
463 | dev_dbg(dev, "panel %d.%din, model 0x%x, EPD 0x%x TCON-rev 0x%x, LUT-rev 0x%x", |
464 | par->panel_size_int, par->panel_size_float, par->panel_model, |
465 | par->epd_type, par->tcon_version, par->lut_version); |
466 | |
467 | pm_runtime_mark_last_busy(dev); |
468 | pm_runtime_put_autosuspend(dev); |
469 | } |
470 | |
471 | /* |
472 | * Sysfs functions |
473 | */ |
474 | |
475 | static ssize_t update_mode_show(struct device *dev, |
476 | struct device_attribute *attr, char *buf) |
477 | { |
478 | struct fb_info *info = dev_get_drvdata(dev); |
479 | struct auok190xfb_par *par = info->par; |
480 | |
481 | return sprintf(buf, "%d\n", par->update_mode); |
482 | } |
483 | |
484 | static ssize_t update_mode_store(struct device *dev, |
485 | struct device_attribute *attr, |
486 | const char *buf, size_t count) |
487 | { |
488 | struct fb_info *info = dev_get_drvdata(dev); |
489 | struct auok190xfb_par *par = info->par; |
490 | int mode, ret; |
491 | |
492 | ret = kstrtoint(buf, 10, &mode); |
493 | if (ret) |
494 | return ret; |
495 | |
496 | par->update_mode = mode; |
497 | |
498 | /* if we enter a better mode, do a full update */ |
499 | if (par->last_mode > 1 && mode < par->last_mode) |
500 | par->update_all(par); |
501 | |
502 | return count; |
503 | } |
504 | |
505 | static ssize_t flash_show(struct device *dev, struct device_attribute *attr, |
506 | char *buf) |
507 | { |
508 | struct fb_info *info = dev_get_drvdata(dev); |
509 | struct auok190xfb_par *par = info->par; |
510 | |
511 | return sprintf(buf, "%d\n", par->flash); |
512 | } |
513 | |
514 | static ssize_t flash_store(struct device *dev, struct device_attribute *attr, |
515 | const char *buf, size_t count) |
516 | { |
517 | struct fb_info *info = dev_get_drvdata(dev); |
518 | struct auok190xfb_par *par = info->par; |
519 | int flash, ret; |
520 | |
521 | ret = kstrtoint(buf, 10, &flash); |
522 | if (ret) |
523 | return ret; |
524 | |
525 | if (flash > 0) |
526 | par->flash = 1; |
527 | else |
528 | par->flash = 0; |
529 | |
530 | return count; |
531 | } |
532 | |
533 | static ssize_t temp_show(struct device *dev, struct device_attribute *attr, |
534 | char *buf) |
535 | { |
536 | struct fb_info *info = dev_get_drvdata(dev); |
537 | struct auok190xfb_par *par = info->par; |
538 | int temp; |
539 | |
540 | temp = auok190x_read_temperature(par); |
541 | return sprintf(buf, "%d\n", temp); |
542 | } |
543 | |
544 | static DEVICE_ATTR(update_mode, 0644, update_mode_show, update_mode_store); |
545 | static DEVICE_ATTR(flash, 0644, flash_show, flash_store); |
546 | static DEVICE_ATTR(temp, 0644, temp_show, NULL); |
547 | |
548 | static struct attribute *auok190x_attributes[] = { |
549 | &dev_attr_update_mode.attr, |
550 | &dev_attr_flash.attr, |
551 | &dev_attr_temp.attr, |
552 | NULL |
553 | }; |
554 | |
555 | static const struct attribute_group auok190x_attr_group = { |
556 | .attrs = auok190x_attributes, |
557 | }; |
558 | |
559 | static int auok190x_power(struct auok190xfb_par *par, bool on) |
560 | { |
561 | struct auok190x_board *board = par->board; |
562 | int ret; |
563 | |
564 | if (on) { |
565 | /* We should maintain POWER up for at least 80ms before set |
566 | * RST_N and SLP_N to high (TCON spec 20100803_v35 p59) |
567 | */ |
568 | ret = regulator_enable(par->regulator); |
569 | if (ret) |
570 | return ret; |
571 | |
572 | msleep(200); |
573 | gpio_set_value(board->gpio_nrst, 1); |
574 | gpio_set_value(board->gpio_nsleep, 1); |
575 | msleep(200); |
576 | } else { |
577 | regulator_disable(par->regulator); |
578 | gpio_set_value(board->gpio_nrst, 0); |
579 | gpio_set_value(board->gpio_nsleep, 0); |
580 | } |
581 | |
582 | return 0; |
583 | } |
584 | |
585 | /* |
586 | * Recovery - powercycle the controller |
587 | */ |
588 | |
589 | static void auok190x_recover(struct auok190xfb_par *par) |
590 | { |
591 | auok190x_power(par, 0); |
592 | msleep(100); |
593 | auok190x_power(par, 1); |
594 | |
595 | par->init(par); |
596 | |
597 | /* wait for init to complete */ |
598 | par->board->wait_for_rdy(par); |
599 | } |
600 | |
601 | /* |
602 | * Power-management |
603 | */ |
604 | |
605 | #ifdef CONFIG_PM |
606 | static int auok190x_runtime_suspend(struct device *dev) |
607 | { |
608 | struct platform_device *pdev = to_platform_device(dev); |
609 | struct fb_info *info = platform_get_drvdata(pdev); |
610 | struct auok190xfb_par *par = info->par; |
611 | struct auok190x_board *board = par->board; |
612 | u16 standby_param; |
613 | |
614 | /* take and keep the lock until we are resumed, as the controller |
615 | * will never reach the non-busy state when in standby mode |
616 | */ |
617 | mutex_lock(&(par->io_lock)); |
618 | |
619 | if (par->standby) { |
620 | dev_warn(dev, "already in standby, runtime-pm pairing mismatch\n"); |
621 | mutex_unlock(&(par->io_lock)); |
622 | return 0; |
623 | } |
624 | |
625 | /* according to runtime_pm.txt runtime_suspend only means, that the |
626 | * device will not process data and will not communicate with the CPU |
627 | * As we hold the lock, this stays true even without standby |
628 | */ |
629 | if (board->quirks & AUOK190X_QUIRK_STANDBYBROKEN) { |
630 | dev_dbg(dev, "runtime suspend without standby\n"); |
631 | goto finish; |
632 | } else if (board->quirks & AUOK190X_QUIRK_STANDBYPARAM) { |
633 | /* for some TCON versions STANDBY expects a parameter (0) but |
634 | * it seems the real tcon version has to be determined yet. |
635 | */ |
636 | dev_dbg(dev, "runtime suspend with additional empty param\n"); |
637 | standby_param = 0; |
638 | auok190x_send_cmdargs(par, AUOK190X_CMD_STANDBY, 1, |
639 | &standby_param); |
640 | } else { |
641 | dev_dbg(dev, "runtime suspend without param\n"); |
642 | auok190x_send_command(par, AUOK190X_CMD_STANDBY); |
643 | } |
644 | |
645 | msleep(64); |
646 | |
647 | finish: |
648 | par->standby = 1; |
649 | |
650 | return 0; |
651 | } |
652 | |
653 | static int auok190x_runtime_resume(struct device *dev) |
654 | { |
655 | struct platform_device *pdev = to_platform_device(dev); |
656 | struct fb_info *info = platform_get_drvdata(pdev); |
657 | struct auok190xfb_par *par = info->par; |
658 | struct auok190x_board *board = par->board; |
659 | |
660 | if (!par->standby) { |
661 | dev_warn(dev, "not in standby, runtime-pm pairing mismatch\n"); |
662 | return 0; |
663 | } |
664 | |
665 | if (board->quirks & AUOK190X_QUIRK_STANDBYBROKEN) { |
666 | dev_dbg(dev, "runtime resume without standby\n"); |
667 | } else { |
668 | /* when in standby, controller is always busy |
669 | * and only accepts the wakeup command |
670 | */ |
671 | dev_dbg(dev, "runtime resume from standby\n"); |
672 | auok190x_send_command_nowait(par, AUOK190X_CMD_WAKEUP); |
673 | |
674 | msleep(160); |
675 | |
676 | /* wait for the controller to be ready and release the lock */ |
677 | board->wait_for_rdy(par); |
678 | } |
679 | |
680 | par->standby = 0; |
681 | |
682 | mutex_unlock(&(par->io_lock)); |
683 | |
684 | return 0; |
685 | } |
686 | |
687 | static int auok190x_suspend(struct device *dev) |
688 | { |
689 | struct platform_device *pdev = to_platform_device(dev); |
690 | struct fb_info *info = platform_get_drvdata(pdev); |
691 | struct auok190xfb_par *par = info->par; |
692 | struct auok190x_board *board = par->board; |
693 | int ret; |
694 | |
695 | dev_dbg(dev, "suspend\n"); |
696 | if (board->quirks & AUOK190X_QUIRK_STANDBYBROKEN) { |
697 | /* suspend via powering off the ic */ |
698 | dev_dbg(dev, "suspend with broken standby\n"); |
699 | |
700 | auok190x_power(par, 0); |
701 | } else { |
702 | dev_dbg(dev, "suspend using sleep\n"); |
703 | |
704 | /* the sleep state can only be entered from the standby state. |
705 | * pm_runtime_get_noresume gets called before the suspend call. |
706 | * So the devices usage count is >0 but it is not necessarily |
707 | * active. |
708 | */ |
709 | if (!pm_runtime_status_suspended(dev)) { |
710 | ret = auok190x_runtime_suspend(dev); |
711 | if (ret < 0) { |
712 | dev_err(dev, "auok190x_runtime_suspend failed with %d\n", |
713 | ret); |
714 | return ret; |
715 | } |
716 | par->manual_standby = 1; |
717 | } |
718 | |
719 | gpio_direction_output(board->gpio_nsleep, 0); |
720 | } |
721 | |
722 | msleep(100); |
723 | |
724 | return 0; |
725 | } |
726 | |
727 | static int auok190x_resume(struct device *dev) |
728 | { |
729 | struct platform_device *pdev = to_platform_device(dev); |
730 | struct fb_info *info = platform_get_drvdata(pdev); |
731 | struct auok190xfb_par *par = info->par; |
732 | struct auok190x_board *board = par->board; |
733 | |
734 | dev_dbg(dev, "resume\n"); |
735 | if (board->quirks & AUOK190X_QUIRK_STANDBYBROKEN) { |
736 | dev_dbg(dev, "resume with broken standby\n"); |
737 | |
738 | auok190x_power(par, 1); |
739 | |
740 | par->init(par); |
741 | } else { |
742 | dev_dbg(dev, "resume from sleep\n"); |
743 | |
744 | /* device should be in runtime suspend when we were suspended |
745 | * and pm_runtime_put_sync gets called after this function. |
746 | * So there is no need to touch the standby mode here at all. |
747 | */ |
748 | gpio_direction_output(board->gpio_nsleep, 1); |
749 | msleep(100); |
750 | |
751 | /* an additional init call seems to be necessary after sleep */ |
752 | auok190x_runtime_resume(dev); |
753 | par->init(par); |
754 | |
755 | /* if we were runtime-suspended before, suspend again*/ |
756 | if (!par->manual_standby) |
757 | auok190x_runtime_suspend(dev); |
758 | else |
759 | par->manual_standby = 0; |
760 | } |
761 | |
762 | return 0; |
763 | } |
764 | #endif |
765 | |
766 | const struct dev_pm_ops auok190x_pm = { |
767 | SET_RUNTIME_PM_OPS(auok190x_runtime_suspend, auok190x_runtime_resume, |
768 | NULL) |
769 | SET_SYSTEM_SLEEP_PM_OPS(auok190x_suspend, auok190x_resume) |
770 | }; |
771 | EXPORT_SYMBOL_GPL(auok190x_pm); |
772 | |
773 | /* |
774 | * Common probe and remove code |
775 | */ |
776 | |
777 | int auok190x_common_probe(struct platform_device *pdev, |
778 | struct auok190x_init_data *init) |
779 | { |
780 | struct auok190x_board *board = init->board; |
781 | struct auok190xfb_par *par; |
782 | struct fb_info *info; |
783 | struct panel_info *panel; |
784 | int videomemorysize, ret; |
785 | unsigned char *videomemory; |
786 | |
787 | /* check board contents */ |
788 | if (!board->init || !board->cleanup || !board->wait_for_rdy |
789 | || !board->set_ctl || !board->set_hdb || !board->get_hdb |
790 | || !board->setup_irq) |
791 | return -EINVAL; |
792 | |
793 | info = framebuffer_alloc(sizeof(struct auok190xfb_par), &pdev->dev); |
794 | if (!info) |
795 | return -ENOMEM; |
796 | |
797 | par = info->par; |
798 | par->info = info; |
799 | par->board = board; |
800 | par->recover = auok190x_recover; |
801 | par->update_partial = init->update_partial; |
802 | par->update_all = init->update_all; |
803 | par->need_refresh = init->need_refresh; |
804 | par->init = init->init; |
805 | |
806 | /* init update modes */ |
807 | par->update_cnt = 0; |
808 | par->update_mode = -1; |
809 | par->last_mode = -1; |
810 | par->flash = 0; |
811 | |
812 | par->regulator = regulator_get(info->device, "vdd"); |
813 | if (IS_ERR(par->regulator)) { |
814 | ret = PTR_ERR(par->regulator); |
815 | dev_err(info->device, "Failed to get regulator: %d\n", ret); |
816 | goto err_reg; |
817 | } |
818 | |
819 | ret = board->init(par); |
820 | if (ret) { |
821 | dev_err(info->device, "board init failed, %d\n", ret); |
822 | goto err_board; |
823 | } |
824 | |
825 | ret = gpio_request(board->gpio_nsleep, "AUOK190x sleep"); |
826 | if (ret) { |
827 | dev_err(info->device, "could not request sleep gpio, %d\n", |
828 | ret); |
829 | goto err_gpio1; |
830 | } |
831 | |
832 | ret = gpio_direction_output(board->gpio_nsleep, 0); |
833 | if (ret) { |
834 | dev_err(info->device, "could not set sleep gpio, %d\n", ret); |
835 | goto err_gpio2; |
836 | } |
837 | |
838 | ret = gpio_request(board->gpio_nrst, "AUOK190x reset"); |
839 | if (ret) { |
840 | dev_err(info->device, "could not request reset gpio, %d\n", |
841 | ret); |
842 | goto err_gpio2; |
843 | } |
844 | |
845 | ret = gpio_direction_output(board->gpio_nrst, 0); |
846 | if (ret) { |
847 | dev_err(info->device, "could not set reset gpio, %d\n", ret); |
848 | goto err_gpio3; |
849 | } |
850 | |
851 | ret = auok190x_power(par, 1); |
852 | if (ret) { |
853 | dev_err(info->device, "could not power on the device, %d\n", |
854 | ret); |
855 | goto err_gpio3; |
856 | } |
857 | |
858 | mutex_init(&par->io_lock); |
859 | |
860 | init_waitqueue_head(&par->waitq); |
861 | |
862 | ret = par->board->setup_irq(par->info); |
863 | if (ret) { |
864 | dev_err(info->device, "could not setup ready-irq, %d\n", ret); |
865 | goto err_irq; |
866 | } |
867 | |
868 | /* wait for init to complete */ |
869 | par->board->wait_for_rdy(par); |
870 | |
871 | /* |
872 | * From here on the controller can talk to us |
873 | */ |
874 | |
875 | /* initialise fix, var, resolution and rotation */ |
876 | |
877 | strlcpy(info->fix.id, init->id, 16); |
878 | info->fix.type = FB_TYPE_PACKED_PIXELS; |
879 | info->fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR; |
880 | info->fix.xpanstep = 0; |
881 | info->fix.ypanstep = 0; |
882 | info->fix.ywrapstep = 0; |
883 | info->fix.accel = FB_ACCEL_NONE; |
884 | |
885 | info->var.bits_per_pixel = 8; |
886 | info->var.grayscale = 1; |
887 | info->var.red.length = 8; |
888 | info->var.green.length = 8; |
889 | info->var.blue.length = 8; |
890 | |
891 | panel = &panel_table[board->resolution]; |
892 | |
893 | /* if 90 degree rotation, switch width and height */ |
894 | if (board->rotation & 1) { |
895 | info->var.xres = panel->h; |
896 | info->var.yres = panel->w; |
897 | info->var.xres_virtual = panel->h; |
898 | info->var.yres_virtual = panel->w; |
899 | info->fix.line_length = panel->h; |
900 | } else { |
901 | info->var.xres = panel->w; |
902 | info->var.yres = panel->h; |
903 | info->var.xres_virtual = panel->w; |
904 | info->var.yres_virtual = panel->h; |
905 | info->fix.line_length = panel->w; |
906 | } |
907 | |
908 | par->resolution = board->resolution; |
909 | par->rotation = board->rotation; |
910 | |
911 | /* videomemory handling */ |
912 | |
913 | videomemorysize = roundup((panel->w * panel->h), PAGE_SIZE); |
914 | videomemory = vmalloc(videomemorysize); |
915 | if (!videomemory) { |
916 | ret = -ENOMEM; |
917 | goto err_irq; |
918 | } |
919 | |
920 | memset(videomemory, 0, videomemorysize); |
921 | info->screen_base = (char *)videomemory; |
922 | info->fix.smem_len = videomemorysize; |
923 | |
924 | info->flags = FBINFO_FLAG_DEFAULT | FBINFO_VIRTFB; |
925 | info->fbops = &auok190xfb_ops; |
926 | |
927 | /* deferred io init */ |
928 | |
929 | info->fbdefio = devm_kzalloc(info->device, |
930 | sizeof(struct fb_deferred_io), |
931 | GFP_KERNEL); |
932 | if (!info->fbdefio) { |
933 | dev_err(info->device, "Failed to allocate memory\n"); |
934 | ret = -ENOMEM; |
935 | goto err_defio; |
936 | } |
937 | |
938 | dev_dbg(info->device, "targetting %d frames per second\n", board->fps); |
939 | info->fbdefio->delay = HZ / board->fps; |
940 | info->fbdefio->first_io = auok190xfb_dpy_first_io, |
941 | info->fbdefio->deferred_io = auok190xfb_dpy_deferred_io, |
942 | fb_deferred_io_init(info); |
943 | |
944 | /* color map */ |
945 | |
946 | ret = fb_alloc_cmap(&info->cmap, 256, 0); |
947 | if (ret < 0) { |
948 | dev_err(info->device, "Failed to allocate colormap\n"); |
949 | goto err_cmap; |
950 | } |
951 | |
952 | /* controller init */ |
953 | |
954 | par->consecutive_threshold = 100; |
955 | par->init(par); |
956 | auok190x_identify(par); |
957 | |
958 | platform_set_drvdata(pdev, info); |
959 | |
960 | ret = register_framebuffer(info); |
961 | if (ret < 0) |
962 | goto err_regfb; |
963 | |
964 | ret = sysfs_create_group(&info->device->kobj, &auok190x_attr_group); |
965 | if (ret) |
966 | goto err_sysfs; |
967 | |
968 | dev_info(info->device, "fb%d: %dx%d using %dK of video memory\n", |
969 | info->node, info->var.xres, info->var.yres, |
970 | videomemorysize >> 10); |
971 | |
972 | /* increase autosuspend_delay when we use alternative methods |
973 | * for runtime_pm |
974 | */ |
975 | par->autosuspend_delay = (board->quirks & AUOK190X_QUIRK_STANDBYBROKEN) |
976 | ? 1000 : 200; |
977 | |
978 | pm_runtime_set_active(info->device); |
979 | pm_runtime_enable(info->device); |
980 | pm_runtime_set_autosuspend_delay(info->device, par->autosuspend_delay); |
981 | pm_runtime_use_autosuspend(info->device); |
982 | |
983 | return 0; |
984 | |
985 | err_sysfs: |
986 | unregister_framebuffer(info); |
987 | err_regfb: |
988 | fb_dealloc_cmap(&info->cmap); |
989 | err_cmap: |
990 | fb_deferred_io_cleanup(info); |
991 | err_defio: |
992 | vfree((void *)info->screen_base); |
993 | err_irq: |
994 | auok190x_power(par, 0); |
995 | err_gpio3: |
996 | gpio_free(board->gpio_nrst); |
997 | err_gpio2: |
998 | gpio_free(board->gpio_nsleep); |
999 | err_gpio1: |
1000 | board->cleanup(par); |
1001 | err_board: |
1002 | regulator_put(par->regulator); |
1003 | err_reg: |
1004 | framebuffer_release(info); |
1005 | |
1006 | return ret; |
1007 | } |
1008 | EXPORT_SYMBOL_GPL(auok190x_common_probe); |
1009 | |
1010 | int auok190x_common_remove(struct platform_device *pdev) |
1011 | { |
1012 | struct fb_info *info = platform_get_drvdata(pdev); |
1013 | struct auok190xfb_par *par = info->par; |
1014 | struct auok190x_board *board = par->board; |
1015 | |
1016 | pm_runtime_disable(info->device); |
1017 | |
1018 | sysfs_remove_group(&info->device->kobj, &auok190x_attr_group); |
1019 | |
1020 | unregister_framebuffer(info); |
1021 | |
1022 | fb_dealloc_cmap(&info->cmap); |
1023 | |
1024 | fb_deferred_io_cleanup(info); |
1025 | |
1026 | vfree((void *)info->screen_base); |
1027 | |
1028 | auok190x_power(par, 0); |
1029 | |
1030 | gpio_free(board->gpio_nrst); |
1031 | gpio_free(board->gpio_nsleep); |
1032 | |
1033 | board->cleanup(par); |
1034 | |
1035 | regulator_put(par->regulator); |
1036 | |
1037 | framebuffer_release(info); |
1038 | |
1039 | return 0; |
1040 | } |
1041 | EXPORT_SYMBOL_GPL(auok190x_common_remove); |
1042 | |
1043 | MODULE_DESCRIPTION("Common code for AUO-K190X controllers"); |
1044 | MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>"); |
1045 | MODULE_LICENSE("GPL"); |
1046 |
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