2 * Common code for AUO-K190X framebuffer drivers
4 * Copyright (C) 2012 Heiko Stuebner <heiko@sntech.de>
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.
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>
17 #include <linux/delay.h>
18 #include <linux/uaccess.h>
19 #include <linux/vmalloc.h>
20 #include <linux/regulator/consumer.h>
22 #include <video/auo_k190xfb.h>
24 #include "auo_k190x.h"
31 /* table of panel specific parameters to be indexed into by the board drivers */
32 static struct panel_info panel_table[] = {
34 [AUOK190X_RESOLUTION_800_600] = {
39 [AUOK190X_RESOLUTION_1024_768] = {
43 [AUOK190X_RESOLUTION_600_800] = {
47 [AUOK190X_RESOLUTION_768_1024] = {
54 * private I80 interface to the board driver
57 static void auok190x_issue_data(struct auok190xfb_par *par, u16 data)
59 par->board->set_ctl(par, AUOK190X_I80_WR, 0);
60 par->board->set_hdb(par, data);
61 par->board->set_ctl(par, AUOK190X_I80_WR, 1);
64 static void auok190x_issue_cmd(struct auok190xfb_par *par, u16 data)
66 par->board->set_ctl(par, AUOK190X_I80_DC, 0);
67 auok190x_issue_data(par, data);
68 par->board->set_ctl(par, AUOK190X_I80_DC, 1);
72 * Conversion of 16bit color to 4bit grayscale
73 * does roughly (0.3 * R + 0.6 G + 0.1 B) / 2
75 static inline int rgb565_to_gray4(u16 data, struct fb_var_screeninfo *var)
77 return ((((data & 0xF800) >> var->red.offset) * 77 +
78 ((data & 0x07E0) >> (var->green.offset + 1)) * 151 +
79 ((data & 0x1F) >> var->blue.offset) * 28) >> 8 >> 1);
82 static int auok190x_issue_pixels_rgb565(struct auok190xfb_par *par, int size,
85 struct fb_var_screeninfo *var = &par->info->var;
86 struct device *dev = par->info->device;
91 dev_err(dev, "issue_pixels: size %d must be a multiple of 8\n",
96 for (i = 0; i < (size >> 2); i++) {
97 par->board->set_ctl(par, AUOK190X_I80_WR, 0);
99 tmp = (rgb565_to_gray4(data[4*i], var) & 0x000F);
100 tmp |= (rgb565_to_gray4(data[4*i+1], var) << 4) & 0x00F0;
101 tmp |= (rgb565_to_gray4(data[4*i+2], var) << 8) & 0x0F00;
102 tmp |= (rgb565_to_gray4(data[4*i+3], var) << 12) & 0xF000;
104 par->board->set_hdb(par, tmp);
105 par->board->set_ctl(par, AUOK190X_I80_WR, 1);
111 static int auok190x_issue_pixels_gray8(struct auok190xfb_par *par, int size,
114 struct device *dev = par->info->device;
119 dev_err(dev, "issue_pixels: size %d must be a multiple of 4\n",
124 for (i = 0; i < (size >> 1); i++) {
125 par->board->set_ctl(par, AUOK190X_I80_WR, 0);
127 /* simple reduction of 8bit staticgray to 4bit gray
128 * combines 4 * 4bit pixel values into a 16bit value
130 tmp = (data[2*i] & 0xF0) >> 4;
131 tmp |= (data[2*i] & 0xF000) >> 8;
132 tmp |= (data[2*i+1] & 0xF0) << 4;
133 tmp |= (data[2*i+1] & 0xF000);
135 par->board->set_hdb(par, tmp);
136 par->board->set_ctl(par, AUOK190X_I80_WR, 1);
142 static int auok190x_issue_pixels(struct auok190xfb_par *par, int size,
145 struct fb_info *info = par->info;
146 struct device *dev = par->info->device;
148 if (info->var.bits_per_pixel == 8 && info->var.grayscale)
149 auok190x_issue_pixels_gray8(par, size, data);
150 else if (info->var.bits_per_pixel == 16)
151 auok190x_issue_pixels_rgb565(par, size, data);
153 dev_err(dev, "unsupported color mode (bits: %d, gray: %d)\n",
154 info->var.bits_per_pixel, info->var.grayscale);
159 static u16 auok190x_read_data(struct auok190xfb_par *par)
163 par->board->set_ctl(par, AUOK190X_I80_OE, 0);
164 data = par->board->get_hdb(par);
165 par->board->set_ctl(par, AUOK190X_I80_OE, 1);
171 * Command interface for the controller drivers
174 void auok190x_send_command_nowait(struct auok190xfb_par *par, u16 data)
176 par->board->set_ctl(par, AUOK190X_I80_CS, 0);
177 auok190x_issue_cmd(par, data);
178 par->board->set_ctl(par, AUOK190X_I80_CS, 1);
180 EXPORT_SYMBOL_GPL(auok190x_send_command_nowait);
182 void auok190x_send_cmdargs_nowait(struct auok190xfb_par *par, u16 cmd,
187 par->board->set_ctl(par, AUOK190X_I80_CS, 0);
188 auok190x_issue_cmd(par, cmd);
190 for (i = 0; i < argc; i++)
191 auok190x_issue_data(par, argv[i]);
192 par->board->set_ctl(par, AUOK190X_I80_CS, 1);
194 EXPORT_SYMBOL_GPL(auok190x_send_cmdargs_nowait);
196 int auok190x_send_command(struct auok190xfb_par *par, u16 data)
200 ret = par->board->wait_for_rdy(par);
204 auok190x_send_command_nowait(par, data);
207 EXPORT_SYMBOL_GPL(auok190x_send_command);
209 int auok190x_send_cmdargs(struct auok190xfb_par *par, u16 cmd,
214 ret = par->board->wait_for_rdy(par);
218 auok190x_send_cmdargs_nowait(par, cmd, argc, argv);
221 EXPORT_SYMBOL_GPL(auok190x_send_cmdargs);
223 int auok190x_read_cmdargs(struct auok190xfb_par *par, u16 cmd,
228 ret = par->board->wait_for_rdy(par);
232 par->board->set_ctl(par, AUOK190X_I80_CS, 0);
233 auok190x_issue_cmd(par, cmd);
235 for (i = 0; i < argc; i++)
236 argv[i] = auok190x_read_data(par);
237 par->board->set_ctl(par, AUOK190X_I80_CS, 1);
241 EXPORT_SYMBOL_GPL(auok190x_read_cmdargs);
243 void auok190x_send_cmdargs_pixels_nowait(struct auok190xfb_par *par, u16 cmd,
244 int argc, u16 *argv, int size, u16 *data)
248 par->board->set_ctl(par, AUOK190X_I80_CS, 0);
250 auok190x_issue_cmd(par, cmd);
252 for (i = 0; i < argc; i++)
253 auok190x_issue_data(par, argv[i]);
255 auok190x_issue_pixels(par, size, data);
257 par->board->set_ctl(par, AUOK190X_I80_CS, 1);
259 EXPORT_SYMBOL_GPL(auok190x_send_cmdargs_pixels_nowait);
261 int auok190x_send_cmdargs_pixels(struct auok190xfb_par *par, u16 cmd,
262 int argc, u16 *argv, int size, u16 *data)
266 ret = par->board->wait_for_rdy(par);
270 auok190x_send_cmdargs_pixels_nowait(par, cmd, argc, argv, size, data);
274 EXPORT_SYMBOL_GPL(auok190x_send_cmdargs_pixels);
277 * fbdefio callbacks - common on both controllers.
280 static void auok190xfb_dpy_first_io(struct fb_info *info)
282 /* tell runtime-pm that we wish to use the device in a short time */
283 pm_runtime_get(info->device);
286 /* this is called back from the deferred io workqueue */
287 static void auok190xfb_dpy_deferred_io(struct fb_info *info,
288 struct list_head *pagelist)
290 struct fb_deferred_io *fbdefio = info->fbdefio;
291 struct auok190xfb_par *par = info->par;
292 u16 line_length = info->fix.line_length;
293 u16 yres = info->var.yres;
300 if (!list_empty(pagelist))
301 /* the device resume should've been requested through first_io,
302 * if the resume did not finish until now, wait for it.
304 pm_runtime_barrier(info->device);
306 /* We reached this via the fsync or some other way.
307 * In either case the first_io function did not run,
308 * so we runtime_resume the device here synchronously.
310 pm_runtime_get_sync(info->device);
312 /* Do a full screen update every n updates to prevent
313 * excessive darkening of the Sipix display.
314 * If we do this, there is no need to walk the pages.
316 if (par->need_refresh(par)) {
317 par->update_all(par);
321 /* height increment is fixed per page */
322 h_inc = DIV_ROUND_UP(PAGE_SIZE , line_length);
324 /* calculate number of pages from pixel height */
325 threshold = par->consecutive_threshold / h_inc;
329 /* walk the written page list and swizzle the data */
330 list_for_each_entry(cur, &fbdefio->pagelist, lru) {
331 if (prev_index < 0) {
332 /* just starting so assign first page */
333 y1 = (cur->index << PAGE_SHIFT) / line_length;
335 } else if ((cur->index - prev_index) <= threshold) {
336 /* page is within our threshold for single updates */
337 h += h_inc * (cur->index - prev_index);
339 /* page not consecutive, issue previous update first */
340 par->update_partial(par, y1, y1 + h);
342 /* start over with our non consecutive page */
343 y1 = (cur->index << PAGE_SHIFT) / line_length;
346 prev_index = cur->index;
349 /* if we still have any pages to update we do so now */
351 /* its a full screen update, just do it */
352 par->update_all(par);
354 par->update_partial(par, y1, min((u16) (y1 + h), yres));
357 pm_runtime_mark_last_busy(info->device);
358 pm_runtime_put_autosuspend(info->device);
362 * framebuffer operations
366 * this is the slow path from userspace. they can seek and write to
367 * the fb. it's inefficient to do anything less than a full screen draw
369 static ssize_t auok190xfb_write(struct fb_info *info, const char __user *buf,
370 size_t count, loff_t *ppos)
372 struct auok190xfb_par *par = info->par;
373 unsigned long p = *ppos;
376 unsigned long total_size;
378 if (info->state != FBINFO_STATE_RUNNING)
381 total_size = info->fix.smem_len;
386 if (count > total_size) {
391 if (count + p > total_size) {
395 count = total_size - p;
398 dst = (void *)(info->screen_base + p);
400 if (copy_from_user(dst, buf, count))
406 par->update_all(par);
408 return (err) ? err : count;
411 static void auok190xfb_fillrect(struct fb_info *info,
412 const struct fb_fillrect *rect)
414 struct auok190xfb_par *par = info->par;
416 sys_fillrect(info, rect);
418 par->update_all(par);
421 static void auok190xfb_copyarea(struct fb_info *info,
422 const struct fb_copyarea *area)
424 struct auok190xfb_par *par = info->par;
426 sys_copyarea(info, area);
428 par->update_all(par);
431 static void auok190xfb_imageblit(struct fb_info *info,
432 const struct fb_image *image)
434 struct auok190xfb_par *par = info->par;
436 sys_imageblit(info, image);
438 par->update_all(par);
441 static int auok190xfb_check_var(struct fb_var_screeninfo *var,
442 struct fb_info *info)
444 struct device *dev = info->device;
445 struct auok190xfb_par *par = info->par;
446 struct panel_info *panel = &panel_table[par->resolution];
453 if (var->bits_per_pixel == 8 && var->grayscale == 1) {
455 * For 8-bit grayscale, R, G, and B offset are equal.
459 var->red.msb_right = 0;
461 var->green.length = 8;
462 var->green.offset = 0;
463 var->green.msb_right = 0;
465 var->blue.length = 8;
466 var->blue.offset = 0;
467 var->blue.msb_right = 0;
469 var->transp.length = 0;
470 var->transp.offset = 0;
471 var->transp.msb_right = 0;
472 } else if (var->bits_per_pixel == 16) {
474 var->red.offset = 11;
475 var->red.msb_right = 0;
477 var->green.length = 6;
478 var->green.offset = 5;
479 var->green.msb_right = 0;
481 var->blue.length = 5;
482 var->blue.offset = 0;
483 var->blue.msb_right = 0;
485 var->transp.length = 0;
486 var->transp.offset = 0;
487 var->transp.msb_right = 0;
489 dev_warn(dev, "unsupported color mode (bits: %d, grayscale: %d)\n",
490 info->var.bits_per_pixel, info->var.grayscale);
498 switch (var->rotate) {
501 var->xres = panel->w;
502 var->yres = panel->h;
506 var->xres = panel->h;
507 var->yres = panel->w;
510 dev_dbg(dev, "Invalid rotation request\n");
514 var->xres_virtual = var->xres;
515 var->yres_virtual = var->yres;
521 size = var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8;
522 if (size > info->fix.smem_len) {
523 dev_err(dev, "Memory limit exceeded, requested %dK\n",
531 static int auok190xfb_set_fix(struct fb_info *info)
533 struct fb_fix_screeninfo *fix = &info->fix;
534 struct fb_var_screeninfo *var = &info->var;
536 fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
538 fix->type = FB_TYPE_PACKED_PIXELS;
539 fix->accel = FB_ACCEL_NONE;
540 fix->visual = (var->grayscale) ? FB_VISUAL_STATIC_PSEUDOCOLOR
541 : FB_VISUAL_TRUECOLOR;
549 static int auok190xfb_set_par(struct fb_info *info)
551 struct auok190xfb_par *par = info->par;
553 par->rotation = info->var.rotate;
554 auok190xfb_set_fix(info);
556 /* reinit the controller to honor the rotation */
559 /* wait for init to complete */
560 par->board->wait_for_rdy(par);
565 static struct fb_ops auok190xfb_ops = {
566 .owner = THIS_MODULE,
567 .fb_read = fb_sys_read,
568 .fb_write = auok190xfb_write,
569 .fb_fillrect = auok190xfb_fillrect,
570 .fb_copyarea = auok190xfb_copyarea,
571 .fb_imageblit = auok190xfb_imageblit,
572 .fb_check_var = auok190xfb_check_var,
573 .fb_set_par = auok190xfb_set_par,
577 * Controller-functions common to both K1900 and K1901
580 static int auok190x_read_temperature(struct auok190xfb_par *par)
582 struct device *dev = par->info->device;
586 pm_runtime_get_sync(dev);
588 mutex_lock(&(par->io_lock));
590 auok190x_read_cmdargs(par, AUOK190X_CMD_READ_VERSION, 4, data);
592 mutex_unlock(&(par->io_lock));
594 pm_runtime_mark_last_busy(dev);
595 pm_runtime_put_autosuspend(dev);
597 /* sanitize and split of half-degrees for now */
598 temp = ((data[0] & AUOK190X_VERSION_TEMP_MASK) >> 1);
600 /* handle positive and negative temperatures */
602 return (255 - temp + 1) * (-1);
607 static void auok190x_identify(struct auok190xfb_par *par)
609 struct device *dev = par->info->device;
612 pm_runtime_get_sync(dev);
614 mutex_lock(&(par->io_lock));
616 auok190x_read_cmdargs(par, AUOK190X_CMD_READ_VERSION, 4, data);
618 mutex_unlock(&(par->io_lock));
620 par->epd_type = data[1] & AUOK190X_VERSION_TEMP_MASK;
622 par->panel_size_int = AUOK190X_VERSION_SIZE_INT(data[2]);
623 par->panel_size_float = AUOK190X_VERSION_SIZE_FLOAT(data[2]);
624 par->panel_model = AUOK190X_VERSION_MODEL(data[2]);
626 par->tcon_version = AUOK190X_VERSION_TCON(data[3]);
627 par->lut_version = AUOK190X_VERSION_LUT(data[3]);
629 dev_dbg(dev, "panel %d.%din, model 0x%x, EPD 0x%x TCON-rev 0x%x, LUT-rev 0x%x",
630 par->panel_size_int, par->panel_size_float, par->panel_model,
631 par->epd_type, par->tcon_version, par->lut_version);
633 pm_runtime_mark_last_busy(dev);
634 pm_runtime_put_autosuspend(dev);
641 static ssize_t update_mode_show(struct device *dev,
642 struct device_attribute *attr, char *buf)
644 struct fb_info *info = dev_get_drvdata(dev);
645 struct auok190xfb_par *par = info->par;
647 return sprintf(buf, "%d\n", par->update_mode);
650 static ssize_t update_mode_store(struct device *dev,
651 struct device_attribute *attr,
652 const char *buf, size_t count)
654 struct fb_info *info = dev_get_drvdata(dev);
655 struct auok190xfb_par *par = info->par;
658 ret = kstrtoint(buf, 10, &mode);
662 par->update_mode = mode;
664 /* if we enter a better mode, do a full update */
665 if (par->last_mode > 1 && mode < par->last_mode)
666 par->update_all(par);
671 static ssize_t flash_show(struct device *dev, struct device_attribute *attr,
674 struct fb_info *info = dev_get_drvdata(dev);
675 struct auok190xfb_par *par = info->par;
677 return sprintf(buf, "%d\n", par->flash);
680 static ssize_t flash_store(struct device *dev, struct device_attribute *attr,
681 const char *buf, size_t count)
683 struct fb_info *info = dev_get_drvdata(dev);
684 struct auok190xfb_par *par = info->par;
687 ret = kstrtoint(buf, 10, &flash);
699 static ssize_t temp_show(struct device *dev, struct device_attribute *attr,
702 struct fb_info *info = dev_get_drvdata(dev);
703 struct auok190xfb_par *par = info->par;
706 temp = auok190x_read_temperature(par);
707 return sprintf(buf, "%d\n", temp);
710 static DEVICE_ATTR(update_mode, 0644, update_mode_show, update_mode_store);
711 static DEVICE_ATTR(flash, 0644, flash_show, flash_store);
712 static DEVICE_ATTR(temp, 0644, temp_show, NULL);
714 static struct attribute *auok190x_attributes[] = {
715 &dev_attr_update_mode.attr,
716 &dev_attr_flash.attr,
721 static const struct attribute_group auok190x_attr_group = {
722 .attrs = auok190x_attributes,
725 static int auok190x_power(struct auok190xfb_par *par, bool on)
727 struct auok190x_board *board = par->board;
731 /* We should maintain POWER up for at least 80ms before set
732 * RST_N and SLP_N to high (TCON spec 20100803_v35 p59)
734 ret = regulator_enable(par->regulator);
739 gpio_set_value(board->gpio_nrst, 1);
740 gpio_set_value(board->gpio_nsleep, 1);
743 regulator_disable(par->regulator);
744 gpio_set_value(board->gpio_nrst, 0);
745 gpio_set_value(board->gpio_nsleep, 0);
752 * Recovery - powercycle the controller
755 static void auok190x_recover(struct auok190xfb_par *par)
757 struct device *dev = par->info->device;
759 auok190x_power(par, 0);
761 auok190x_power(par, 1);
763 /* after powercycling the device, it's always active */
764 pm_runtime_set_active(dev);
769 /* wait for init to complete */
770 par->board->wait_for_rdy(par);
778 static int auok190x_runtime_suspend(struct device *dev)
780 struct platform_device *pdev = to_platform_device(dev);
781 struct fb_info *info = platform_get_drvdata(pdev);
782 struct auok190xfb_par *par = info->par;
783 struct auok190x_board *board = par->board;
786 /* take and keep the lock until we are resumed, as the controller
787 * will never reach the non-busy state when in standby mode
789 mutex_lock(&(par->io_lock));
792 dev_warn(dev, "already in standby, runtime-pm pairing mismatch\n");
793 mutex_unlock(&(par->io_lock));
797 /* according to runtime_pm.txt runtime_suspend only means, that the
798 * device will not process data and will not communicate with the CPU
799 * As we hold the lock, this stays true even without standby
801 if (board->quirks & AUOK190X_QUIRK_STANDBYBROKEN) {
802 dev_dbg(dev, "runtime suspend without standby\n");
804 } else if (board->quirks & AUOK190X_QUIRK_STANDBYPARAM) {
805 /* for some TCON versions STANDBY expects a parameter (0) but
806 * it seems the real tcon version has to be determined yet.
808 dev_dbg(dev, "runtime suspend with additional empty param\n");
810 auok190x_send_cmdargs(par, AUOK190X_CMD_STANDBY, 1,
813 dev_dbg(dev, "runtime suspend without param\n");
814 auok190x_send_command(par, AUOK190X_CMD_STANDBY);
825 static int auok190x_runtime_resume(struct device *dev)
827 struct platform_device *pdev = to_platform_device(dev);
828 struct fb_info *info = platform_get_drvdata(pdev);
829 struct auok190xfb_par *par = info->par;
830 struct auok190x_board *board = par->board;
833 dev_warn(dev, "not in standby, runtime-pm pairing mismatch\n");
837 if (board->quirks & AUOK190X_QUIRK_STANDBYBROKEN) {
838 dev_dbg(dev, "runtime resume without standby\n");
840 /* when in standby, controller is always busy
841 * and only accepts the wakeup command
843 dev_dbg(dev, "runtime resume from standby\n");
844 auok190x_send_command_nowait(par, AUOK190X_CMD_WAKEUP);
848 /* wait for the controller to be ready and release the lock */
849 board->wait_for_rdy(par);
854 mutex_unlock(&(par->io_lock));
859 static int auok190x_suspend(struct device *dev)
861 struct platform_device *pdev = to_platform_device(dev);
862 struct fb_info *info = platform_get_drvdata(pdev);
863 struct auok190xfb_par *par = info->par;
864 struct auok190x_board *board = par->board;
867 dev_dbg(dev, "suspend\n");
868 if (board->quirks & AUOK190X_QUIRK_STANDBYBROKEN) {
869 /* suspend via powering off the ic */
870 dev_dbg(dev, "suspend with broken standby\n");
872 auok190x_power(par, 0);
874 dev_dbg(dev, "suspend using sleep\n");
876 /* the sleep state can only be entered from the standby state.
877 * pm_runtime_get_noresume gets called before the suspend call.
878 * So the devices usage count is >0 but it is not necessarily
881 if (!pm_runtime_status_suspended(dev)) {
882 ret = auok190x_runtime_suspend(dev);
884 dev_err(dev, "auok190x_runtime_suspend failed with %d\n",
888 par->manual_standby = 1;
891 gpio_direction_output(board->gpio_nsleep, 0);
899 static int auok190x_resume(struct device *dev)
901 struct platform_device *pdev = to_platform_device(dev);
902 struct fb_info *info = platform_get_drvdata(pdev);
903 struct auok190xfb_par *par = info->par;
904 struct auok190x_board *board = par->board;
906 dev_dbg(dev, "resume\n");
907 if (board->quirks & AUOK190X_QUIRK_STANDBYBROKEN) {
908 dev_dbg(dev, "resume with broken standby\n");
910 auok190x_power(par, 1);
914 dev_dbg(dev, "resume from sleep\n");
916 /* device should be in runtime suspend when we were suspended
917 * and pm_runtime_put_sync gets called after this function.
918 * So there is no need to touch the standby mode here at all.
920 gpio_direction_output(board->gpio_nsleep, 1);
923 /* an additional init call seems to be necessary after sleep */
924 auok190x_runtime_resume(dev);
927 /* if we were runtime-suspended before, suspend again*/
928 if (!par->manual_standby)
929 auok190x_runtime_suspend(dev);
931 par->manual_standby = 0;
938 const struct dev_pm_ops auok190x_pm = {
939 SET_RUNTIME_PM_OPS(auok190x_runtime_suspend, auok190x_runtime_resume,
941 SET_SYSTEM_SLEEP_PM_OPS(auok190x_suspend, auok190x_resume)
943 EXPORT_SYMBOL_GPL(auok190x_pm);
946 * Common probe and remove code
949 int auok190x_common_probe(struct platform_device *pdev,
950 struct auok190x_init_data *init)
952 struct auok190x_board *board = init->board;
953 struct auok190xfb_par *par;
954 struct fb_info *info;
955 struct panel_info *panel;
956 int videomemorysize, ret;
957 unsigned char *videomemory;
959 /* check board contents */
960 if (!board->init || !board->cleanup || !board->wait_for_rdy
961 || !board->set_ctl || !board->set_hdb || !board->get_hdb
962 || !board->setup_irq)
965 info = framebuffer_alloc(sizeof(struct auok190xfb_par), &pdev->dev);
972 par->recover = auok190x_recover;
973 par->update_partial = init->update_partial;
974 par->update_all = init->update_all;
975 par->need_refresh = init->need_refresh;
976 par->init = init->init;
978 /* init update modes */
980 par->update_mode = -1;
984 par->regulator = regulator_get(info->device, "vdd");
985 if (IS_ERR(par->regulator)) {
986 ret = PTR_ERR(par->regulator);
987 dev_err(info->device, "Failed to get regulator: %d\n", ret);
991 ret = board->init(par);
993 dev_err(info->device, "board init failed, %d\n", ret);
997 ret = gpio_request(board->gpio_nsleep, "AUOK190x sleep");
999 dev_err(info->device, "could not request sleep gpio, %d\n",
1004 ret = gpio_direction_output(board->gpio_nsleep, 0);
1006 dev_err(info->device, "could not set sleep gpio, %d\n", ret);
1010 ret = gpio_request(board->gpio_nrst, "AUOK190x reset");
1012 dev_err(info->device, "could not request reset gpio, %d\n",
1017 ret = gpio_direction_output(board->gpio_nrst, 0);
1019 dev_err(info->device, "could not set reset gpio, %d\n", ret);
1023 ret = auok190x_power(par, 1);
1025 dev_err(info->device, "could not power on the device, %d\n",
1030 mutex_init(&par->io_lock);
1032 init_waitqueue_head(&par->waitq);
1034 ret = par->board->setup_irq(par->info);
1036 dev_err(info->device, "could not setup ready-irq, %d\n", ret);
1040 /* wait for init to complete */
1041 par->board->wait_for_rdy(par);
1044 * From here on the controller can talk to us
1047 /* initialise fix, var, resolution and rotation */
1049 strlcpy(info->fix.id, init->id, 16);
1050 info->var.bits_per_pixel = 8;
1051 info->var.grayscale = 1;
1053 panel = &panel_table[board->resolution];
1055 par->resolution = board->resolution;
1058 /* videomemory handling */
1060 videomemorysize = roundup((panel->w * panel->h) * 2, PAGE_SIZE);
1061 videomemory = vmalloc(videomemorysize);
1067 memset(videomemory, 0, videomemorysize);
1068 info->screen_base = (char *)videomemory;
1069 info->fix.smem_len = videomemorysize;
1071 info->flags = FBINFO_FLAG_DEFAULT | FBINFO_VIRTFB;
1072 info->fbops = &auok190xfb_ops;
1074 ret = auok190xfb_check_var(&info->var, info);
1078 auok190xfb_set_fix(info);
1080 /* deferred io init */
1082 info->fbdefio = devm_kzalloc(info->device,
1083 sizeof(struct fb_deferred_io),
1085 if (!info->fbdefio) {
1086 dev_err(info->device, "Failed to allocate memory\n");
1091 dev_dbg(info->device, "targeting %d frames per second\n", board->fps);
1092 info->fbdefio->delay = HZ / board->fps;
1093 info->fbdefio->first_io = auok190xfb_dpy_first_io,
1094 info->fbdefio->deferred_io = auok190xfb_dpy_deferred_io,
1095 fb_deferred_io_init(info);
1099 ret = fb_alloc_cmap(&info->cmap, 256, 0);
1101 dev_err(info->device, "Failed to allocate colormap\n");
1105 /* controller init */
1107 par->consecutive_threshold = 100;
1109 auok190x_identify(par);
1111 platform_set_drvdata(pdev, info);
1113 ret = register_framebuffer(info);
1117 ret = sysfs_create_group(&info->device->kobj, &auok190x_attr_group);
1121 dev_info(info->device, "fb%d: %dx%d using %dK of video memory\n",
1122 info->node, info->var.xres, info->var.yres,
1123 videomemorysize >> 10);
1125 /* increase autosuspend_delay when we use alternative methods
1128 par->autosuspend_delay = (board->quirks & AUOK190X_QUIRK_STANDBYBROKEN)
1131 pm_runtime_set_active(info->device);
1132 pm_runtime_enable(info->device);
1133 pm_runtime_set_autosuspend_delay(info->device, par->autosuspend_delay);
1134 pm_runtime_use_autosuspend(info->device);
1139 unregister_framebuffer(info);
1141 fb_dealloc_cmap(&info->cmap);
1143 fb_deferred_io_cleanup(info);
1145 vfree((void *)info->screen_base);
1147 auok190x_power(par, 0);
1149 gpio_free(board->gpio_nrst);
1151 gpio_free(board->gpio_nsleep);
1153 board->cleanup(par);
1155 regulator_put(par->regulator);
1157 framebuffer_release(info);
1161 EXPORT_SYMBOL_GPL(auok190x_common_probe);
1163 int auok190x_common_remove(struct platform_device *pdev)
1165 struct fb_info *info = platform_get_drvdata(pdev);
1166 struct auok190xfb_par *par = info->par;
1167 struct auok190x_board *board = par->board;
1169 pm_runtime_disable(info->device);
1171 sysfs_remove_group(&info->device->kobj, &auok190x_attr_group);
1173 unregister_framebuffer(info);
1175 fb_dealloc_cmap(&info->cmap);
1177 fb_deferred_io_cleanup(info);
1179 vfree((void *)info->screen_base);
1181 auok190x_power(par, 0);
1183 gpio_free(board->gpio_nrst);
1184 gpio_free(board->gpio_nsleep);
1186 board->cleanup(par);
1188 regulator_put(par->regulator);
1190 framebuffer_release(info);
1194 EXPORT_SYMBOL_GPL(auok190x_common_remove);
1196 MODULE_DESCRIPTION("Common code for AUO-K190X controllers");
1197 MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>");
1198 MODULE_LICENSE("GPL");