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Merge tag 'locking-urgent-2020-12-27' of git://git.kernel.org/pub/scm/linux/kernel...
[linux/fpc-iii.git] / drivers / video / fbdev / omap / omapfb_main.c
blob3d090d2d9ed9ee2c5e4015c5c2a0c2e208402810
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Framebuffer driver for TI OMAP boards
4 *
5 * Copyright (C) 2004 Nokia Corporation
6 * Author: Imre Deak <imre.deak@nokia.com>
7 *
8 * Acknowledgements:
9 * Alex McMains <aam@ridgerun.com> - Original driver
10 * Juha Yrjola <juha.yrjola@nokia.com> - Original driver and improvements
11 * Dirk Behme <dirk.behme@de.bosch.com> - changes for 2.6 kernel API
12 * Texas Instruments - H3 support
13 */
14 #include <linux/platform_device.h>
15 #include <linux/mm.h>
16 #include <linux/slab.h>
17 #include <linux/uaccess.h>
18 #include <linux/module.h>
19
20 #include <linux/omap-dma.h>
21
22 #include <mach/hardware.h>
23
24 #include "omapfb.h"
25 #include "lcdc.h"
26
27 #define MODULE_NAME "omapfb"
28
29 static unsigned int def_accel;
30 static unsigned long def_vram[OMAPFB_PLANE_NUM];
31 static unsigned int def_vram_cnt;
32 static unsigned long def_vxres;
33 static unsigned long def_vyres;
34 static unsigned int def_rotate;
35 static unsigned int def_mirror;
36
37 static bool manual_update = IS_BUILTIN(CONFIG_FB_OMAP_MANUAL_UPDATE);
38
39 static struct platform_device *fbdev_pdev;
40 static struct lcd_panel *fbdev_panel;
41 static struct omapfb_device *omapfb_dev;
42
43 struct caps_table_struct {
44 unsigned long flag;
45 const char *name;
46 };
47
48 static const struct caps_table_struct ctrl_caps[] = {
49 { OMAPFB_CAPS_MANUAL_UPDATE, "manual update" },
50 { OMAPFB_CAPS_TEARSYNC, "tearing synchronization" },
51 { OMAPFB_CAPS_PLANE_RELOCATE_MEM, "relocate plane memory" },
52 { OMAPFB_CAPS_PLANE_SCALE, "scale plane" },
53 { OMAPFB_CAPS_WINDOW_PIXEL_DOUBLE, "pixel double window" },
54 { OMAPFB_CAPS_WINDOW_SCALE, "scale window" },
55 { OMAPFB_CAPS_WINDOW_OVERLAY, "overlay window" },
56 { OMAPFB_CAPS_WINDOW_ROTATE, "rotate window" },
57 { OMAPFB_CAPS_SET_BACKLIGHT, "backlight setting" },
58 };
59
60 static const struct caps_table_struct color_caps[] = {
61 { 1 << OMAPFB_COLOR_RGB565, "RGB565", },
62 { 1 << OMAPFB_COLOR_YUV422, "YUV422", },
63 { 1 << OMAPFB_COLOR_YUV420, "YUV420", },
64 { 1 << OMAPFB_COLOR_CLUT_8BPP, "CLUT8", },
65 { 1 << OMAPFB_COLOR_CLUT_4BPP, "CLUT4", },
66 { 1 << OMAPFB_COLOR_CLUT_2BPP, "CLUT2", },
67 { 1 << OMAPFB_COLOR_CLUT_1BPP, "CLUT1", },
68 { 1 << OMAPFB_COLOR_RGB444, "RGB444", },
69 { 1 << OMAPFB_COLOR_YUY422, "YUY422", },
70 };
71
72 static void omapdss_release(struct device *dev)
73 {
74 }
75
76 /* dummy device for clocks */
77 static struct platform_device omapdss_device = {
78 .name = "omapdss_dss",
79 .id = -1,
80 .dev = {
81 .release = omapdss_release,
82 },
83 };
84
85 /*
86 * ---------------------------------------------------------------------------
87 * LCD panel
88 * ---------------------------------------------------------------------------
89 */
90 extern struct lcd_ctrl hwa742_ctrl;
91
92 static const struct lcd_ctrl *ctrls[] = {
93 &omap1_int_ctrl,
94
95 #ifdef CONFIG_FB_OMAP_LCDC_HWA742
96 &hwa742_ctrl,
97 #endif
98 };
99
100 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
101 extern struct lcd_ctrl_extif omap1_ext_if;
102 #endif
103
104 static void omapfb_rqueue_lock(struct omapfb_device *fbdev)
105 {
106 mutex_lock(&fbdev->rqueue_mutex);
107 }
108
109 static void omapfb_rqueue_unlock(struct omapfb_device *fbdev)
110 {
111 mutex_unlock(&fbdev->rqueue_mutex);
112 }
113
114 /*
115 * ---------------------------------------------------------------------------
116 * LCD controller and LCD DMA
117 * ---------------------------------------------------------------------------
118 */
119 /*
120 * Allocate resources needed for LCD controller and LCD DMA operations. Video
121 * memory is allocated from system memory according to the virtual display
122 * size, except if a bigger memory size is specified explicitly as a kernel
123 * parameter.
124 */
125 static int ctrl_init(struct omapfb_device *fbdev)
126 {
127 int r;
128 int i;
129
130 /* kernel/module vram parameters override boot tags/board config */
131 if (def_vram_cnt) {
132 for (i = 0; i < def_vram_cnt; i++)
133 fbdev->mem_desc.region[i].size =
134 PAGE_ALIGN(def_vram[i]);
135 fbdev->mem_desc.region_cnt = i;
136 }
137
138 if (!fbdev->mem_desc.region_cnt) {
139 struct lcd_panel *panel = fbdev->panel;
140 int def_size;
141 int bpp = panel->bpp;
142
143 /* 12 bpp is packed in 16 bits */
144 if (bpp == 12)
145 bpp = 16;
146 def_size = def_vxres * def_vyres * bpp / 8;
147 fbdev->mem_desc.region_cnt = 1;
148 fbdev->mem_desc.region[0].size = PAGE_ALIGN(def_size);
149 }
150 r = fbdev->ctrl->init(fbdev, 0, &fbdev->mem_desc);
151 if (r < 0) {
152 dev_err(fbdev->dev, "controller initialization failed (%d)\n",
153 r);
154 return r;
155 }
156
157 #ifdef DEBUG
158 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
159 dev_dbg(fbdev->dev, "region%d phys %08x virt %p size=%lu\n",
160 i,
161 fbdev->mem_desc.region[i].paddr,
162 fbdev->mem_desc.region[i].vaddr,
163 fbdev->mem_desc.region[i].size);
164 }
165 #endif
166 return 0;
167 }
168
169 static void ctrl_cleanup(struct omapfb_device *fbdev)
170 {
171 fbdev->ctrl->cleanup();
172 }
173
174 /* Must be called with fbdev->rqueue_mutex held. */
175 static int ctrl_change_mode(struct fb_info *fbi)
176 {
177 int r;
178 unsigned long offset;
179 struct omapfb_plane_struct *plane = fbi->par;
180 struct omapfb_device *fbdev = plane->fbdev;
181 struct fb_var_screeninfo *var = &fbi->var;
182
183 offset = var->yoffset * fbi->fix.line_length +
184 var->xoffset * var->bits_per_pixel / 8;
185
186 if (fbdev->ctrl->sync)
187 fbdev->ctrl->sync();
188 r = fbdev->ctrl->setup_plane(plane->idx, plane->info.channel_out,
189 offset, var->xres_virtual,
190 plane->info.pos_x, plane->info.pos_y,
191 var->xres, var->yres, plane->color_mode);
192 if (r < 0)
193 return r;
194
195 if (fbdev->ctrl->set_rotate != NULL) {
196 r = fbdev->ctrl->set_rotate(var->rotate);
197 if (r < 0)
198 return r;
199 }
200
201 if (fbdev->ctrl->set_scale != NULL)
202 r = fbdev->ctrl->set_scale(plane->idx,
203 var->xres, var->yres,
204 plane->info.out_width,
205 plane->info.out_height);
206
207 return r;
208 }
209
210 /*
211 * ---------------------------------------------------------------------------
212 * fbdev framework callbacks and the ioctl interface
213 * ---------------------------------------------------------------------------
214 */
215 /* Called each time the omapfb device is opened */
216 static int omapfb_open(struct fb_info *info, int user)
217 {
218 return 0;
219 }
220
221 static void omapfb_sync(struct fb_info *info);
222
223 /* Called when the omapfb device is closed. We make sure that any pending
224 * gfx DMA operations are ended, before we return. */
225 static int omapfb_release(struct fb_info *info, int user)
226 {
227 omapfb_sync(info);
228 return 0;
229 }
230
231 /* Store a single color palette entry into a pseudo palette or the hardware
232 * palette if one is available. For now we support only 16bpp and thus store
233 * the entry only to the pseudo palette.
234 */
235 static int _setcolreg(struct fb_info *info, u_int regno, u_int red, u_int green,
236 u_int blue, u_int transp, int update_hw_pal)
237 {
238 struct omapfb_plane_struct *plane = info->par;
239 struct omapfb_device *fbdev = plane->fbdev;
240 struct fb_var_screeninfo *var = &info->var;
241 int r = 0;
242
243 switch (plane->color_mode) {
244 case OMAPFB_COLOR_YUV422:
245 case OMAPFB_COLOR_YUV420:
246 case OMAPFB_COLOR_YUY422:
247 r = -EINVAL;
248 break;
249 case OMAPFB_COLOR_CLUT_8BPP:
250 case OMAPFB_COLOR_CLUT_4BPP:
251 case OMAPFB_COLOR_CLUT_2BPP:
252 case OMAPFB_COLOR_CLUT_1BPP:
253 if (fbdev->ctrl->setcolreg)
254 r = fbdev->ctrl->setcolreg(regno, red, green, blue,
255 transp, update_hw_pal);
256 fallthrough;
257 case OMAPFB_COLOR_RGB565:
258 case OMAPFB_COLOR_RGB444:
259 if (r != 0)
260 break;
261
262 if (regno < 16) {
263 u16 pal;
264 pal = ((red >> (16 - var->red.length)) <<
265 var->red.offset) |
266 ((green >> (16 - var->green.length)) <<
267 var->green.offset) |
268 (blue >> (16 - var->blue.length));
269 ((u32 *)(info->pseudo_palette))[regno] = pal;
270 }
271 break;
272 default:
273 BUG();
274 }
275 return r;
276 }
277
278 static int omapfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
279 u_int transp, struct fb_info *info)
280 {
281 return _setcolreg(info, regno, red, green, blue, transp, 1);
282 }
283
284 static int omapfb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
285 {
286 int count, index, r;
287 u16 *red, *green, *blue, *transp;
288 u16 trans = 0xffff;
289
290 red = cmap->red;
291 green = cmap->green;
292 blue = cmap->blue;
293 transp = cmap->transp;
294 index = cmap->start;
295
296 for (count = 0; count < cmap->len; count++) {
297 if (transp)
298 trans = *transp++;
299 r = _setcolreg(info, index++, *red++, *green++, *blue++, trans,
300 count == cmap->len - 1);
301 if (r != 0)
302 return r;
303 }
304
305 return 0;
306 }
307
308 static int omapfb_update_full_screen(struct fb_info *fbi);
309
310 static int omapfb_blank(int blank, struct fb_info *fbi)
311 {
312 struct omapfb_plane_struct *plane = fbi->par;
313 struct omapfb_device *fbdev = plane->fbdev;
314 int do_update = 0;
315 int r = 0;
316
317 omapfb_rqueue_lock(fbdev);
318 switch (blank) {
319 case FB_BLANK_UNBLANK:
320 if (fbdev->state == OMAPFB_SUSPENDED) {
321 if (fbdev->ctrl->resume)
322 fbdev->ctrl->resume();
323 if (fbdev->panel->enable)
324 fbdev->panel->enable(fbdev->panel);
325 fbdev->state = OMAPFB_ACTIVE;
326 if (fbdev->ctrl->get_update_mode() ==
327 OMAPFB_MANUAL_UPDATE)
328 do_update = 1;
329 }
330 break;
331 case FB_BLANK_POWERDOWN:
332 if (fbdev->state == OMAPFB_ACTIVE) {
333 if (fbdev->panel->disable)
334 fbdev->panel->disable(fbdev->panel);
335 if (fbdev->ctrl->suspend)
336 fbdev->ctrl->suspend();
337 fbdev->state = OMAPFB_SUSPENDED;
338 }
339 break;
340 default:
341 r = -EINVAL;
342 }
343 omapfb_rqueue_unlock(fbdev);
344
345 if (r == 0 && do_update)
346 r = omapfb_update_full_screen(fbi);
347
348 return r;
349 }
350
351 static void omapfb_sync(struct fb_info *fbi)
352 {
353 struct omapfb_plane_struct *plane = fbi->par;
354 struct omapfb_device *fbdev = plane->fbdev;
355
356 omapfb_rqueue_lock(fbdev);
357 if (fbdev->ctrl->sync)
358 fbdev->ctrl->sync();
359 omapfb_rqueue_unlock(fbdev);
360 }
361
362 /*
363 * Set fb_info.fix fields and also updates fbdev.
364 * When calling this fb_info.var must be set up already.
365 */
366 static void set_fb_fix(struct fb_info *fbi, int from_init)
367 {
368 struct fb_fix_screeninfo *fix = &fbi->fix;
369 struct fb_var_screeninfo *var = &fbi->var;
370 struct omapfb_plane_struct *plane = fbi->par;
371 struct omapfb_mem_region *rg;
372 int bpp;
373
374 rg = &plane->fbdev->mem_desc.region[plane->idx];
375 fbi->screen_base = rg->vaddr;
376
377 if (!from_init) {
378 mutex_lock(&fbi->mm_lock);
379 fix->smem_start = rg->paddr;
380 fix->smem_len = rg->size;
381 mutex_unlock(&fbi->mm_lock);
382 } else {
383 fix->smem_start = rg->paddr;
384 fix->smem_len = rg->size;
385 }
386
387 fix->type = FB_TYPE_PACKED_PIXELS;
388 bpp = var->bits_per_pixel;
389 if (var->nonstd)
390 fix->visual = FB_VISUAL_PSEUDOCOLOR;
391 else switch (var->bits_per_pixel) {
392 case 16:
393 case 12:
394 fix->visual = FB_VISUAL_TRUECOLOR;
395 /* 12bpp is stored in 16 bits */
396 bpp = 16;
397 break;
398 case 1:
399 case 2:
400 case 4:
401 case 8:
402 fix->visual = FB_VISUAL_PSEUDOCOLOR;
403 break;
404 }
405 fix->accel = FB_ACCEL_OMAP1610;
406 fix->line_length = var->xres_virtual * bpp / 8;
407 }
408
409 static int set_color_mode(struct omapfb_plane_struct *plane,
410 struct fb_var_screeninfo *var)
411 {
412 switch (var->nonstd) {
413 case 0:
414 break;
415 case OMAPFB_COLOR_YUV422:
416 var->bits_per_pixel = 16;
417 plane->color_mode = var->nonstd;
418 return 0;
419 case OMAPFB_COLOR_YUV420:
420 var->bits_per_pixel = 12;
421 plane->color_mode = var->nonstd;
422 return 0;
423 case OMAPFB_COLOR_YUY422:
424 var->bits_per_pixel = 16;
425 plane->color_mode = var->nonstd;
426 return 0;
427 default:
428 return -EINVAL;
429 }
430
431 switch (var->bits_per_pixel) {
432 case 1:
433 plane->color_mode = OMAPFB_COLOR_CLUT_1BPP;
434 return 0;
435 case 2:
436 plane->color_mode = OMAPFB_COLOR_CLUT_2BPP;
437 return 0;
438 case 4:
439 plane->color_mode = OMAPFB_COLOR_CLUT_4BPP;
440 return 0;
441 case 8:
442 plane->color_mode = OMAPFB_COLOR_CLUT_8BPP;
443 return 0;
444 case 12:
445 var->bits_per_pixel = 16;
446 fallthrough;
447 case 16:
448 if (plane->fbdev->panel->bpp == 12)
449 plane->color_mode = OMAPFB_COLOR_RGB444;
450 else
451 plane->color_mode = OMAPFB_COLOR_RGB565;
452 return 0;
453 default:
454 return -EINVAL;
455 }
456 }
457
458 /*
459 * Check the values in var against our capabilities and in case of out of
460 * bound values try to adjust them.
461 */
462 static int set_fb_var(struct fb_info *fbi,
463 struct fb_var_screeninfo *var)
464 {
465 int bpp;
466 unsigned long max_frame_size;
467 unsigned long line_size;
468 int xres_min, xres_max;
469 int yres_min, yres_max;
470 struct omapfb_plane_struct *plane = fbi->par;
471 struct omapfb_device *fbdev = plane->fbdev;
472 struct lcd_panel *panel = fbdev->panel;
473
474 if (set_color_mode(plane, var) < 0)
475 return -EINVAL;
476
477 bpp = var->bits_per_pixel;
478 if (plane->color_mode == OMAPFB_COLOR_RGB444)
479 bpp = 16;
480
481 switch (var->rotate) {
482 case 0:
483 case 180:
484 xres_min = OMAPFB_PLANE_XRES_MIN;
485 xres_max = panel->x_res;
486 yres_min = OMAPFB_PLANE_YRES_MIN;
487 yres_max = panel->y_res;
488 if (cpu_is_omap15xx()) {
489 var->xres = panel->x_res;
490 var->yres = panel->y_res;
491 }
492 break;
493 case 90:
494 case 270:
495 xres_min = OMAPFB_PLANE_YRES_MIN;
496 xres_max = panel->y_res;
497 yres_min = OMAPFB_PLANE_XRES_MIN;
498 yres_max = panel->x_res;
499 if (cpu_is_omap15xx()) {
500 var->xres = panel->y_res;
501 var->yres = panel->x_res;
502 }
503 break;
504 default:
505 return -EINVAL;
506 }
507
508 if (var->xres < xres_min)
509 var->xres = xres_min;
510 if (var->yres < yres_min)
511 var->yres = yres_min;
512 if (var->xres > xres_max)
513 var->xres = xres_max;
514 if (var->yres > yres_max)
515 var->yres = yres_max;
516
517 if (var->xres_virtual < var->xres)
518 var->xres_virtual = var->xres;
519 if (var->yres_virtual < var->yres)
520 var->yres_virtual = var->yres;
521 max_frame_size = fbdev->mem_desc.region[plane->idx].size;
522 line_size = var->xres_virtual * bpp / 8;
523 if (line_size * var->yres_virtual > max_frame_size) {
524 /* Try to keep yres_virtual first */
525 line_size = max_frame_size / var->yres_virtual;
526 var->xres_virtual = line_size * 8 / bpp;
527 if (var->xres_virtual < var->xres) {
528 /* Still doesn't fit. Shrink yres_virtual too */
529 var->xres_virtual = var->xres;
530 line_size = var->xres * bpp / 8;
531 var->yres_virtual = max_frame_size / line_size;
532 }
533 /* Recheck this, as the virtual size changed. */
534 if (var->xres_virtual < var->xres)
535 var->xres = var->xres_virtual;
536 if (var->yres_virtual < var->yres)
537 var->yres = var->yres_virtual;
538 if (var->xres < xres_min || var->yres < yres_min)
539 return -EINVAL;
540 }
541 if (var->xres + var->xoffset > var->xres_virtual)
542 var->xoffset = var->xres_virtual - var->xres;
543 if (var->yres + var->yoffset > var->yres_virtual)
544 var->yoffset = var->yres_virtual - var->yres;
545
546 if (plane->color_mode == OMAPFB_COLOR_RGB444) {
547 var->red.offset = 8; var->red.length = 4;
548 var->red.msb_right = 0;
549 var->green.offset = 4; var->green.length = 4;
550 var->green.msb_right = 0;
551 var->blue.offset = 0; var->blue.length = 4;
552 var->blue.msb_right = 0;
553 } else {
554 var->red.offset = 11; var->red.length = 5;
555 var->red.msb_right = 0;
556 var->green.offset = 5; var->green.length = 6;
557 var->green.msb_right = 0;
558 var->blue.offset = 0; var->blue.length = 5;
559 var->blue.msb_right = 0;
560 }
561
562 var->height = -1;
563 var->width = -1;
564 var->grayscale = 0;
565
566 /* pixclock in ps, the rest in pixclock */
567 var->pixclock = 10000000 / (panel->pixel_clock / 100);
568 var->left_margin = panel->hfp;
569 var->right_margin = panel->hbp;
570 var->upper_margin = panel->vfp;
571 var->lower_margin = panel->vbp;
572 var->hsync_len = panel->hsw;
573 var->vsync_len = panel->vsw;
574
575 /* TODO: get these from panel->config */
576 var->vmode = FB_VMODE_NONINTERLACED;
577 var->sync = 0;
578
579 return 0;
580 }
581
582
583 /*
584 * Set new x,y offsets in the virtual display for the visible area and switch
585 * to the new mode.
586 */
587 static int omapfb_pan_display(struct fb_var_screeninfo *var,
588 struct fb_info *fbi)
589 {
590 struct omapfb_plane_struct *plane = fbi->par;
591 struct omapfb_device *fbdev = plane->fbdev;
592 int r = 0;
593
594 omapfb_rqueue_lock(fbdev);
595 if (var->xoffset != fbi->var.xoffset ||
596 var->yoffset != fbi->var.yoffset) {
597 struct fb_var_screeninfo *new_var = &fbdev->new_var;
598
599 memcpy(new_var, &fbi->var, sizeof(*new_var));
600 new_var->xoffset = var->xoffset;
601 new_var->yoffset = var->yoffset;
602 if (set_fb_var(fbi, new_var))
603 r = -EINVAL;
604 else {
605 memcpy(&fbi->var, new_var, sizeof(*new_var));
606 ctrl_change_mode(fbi);
607 }
608 }
609 omapfb_rqueue_unlock(fbdev);
610
611 return r;
612 }
613
614 /* Set mirror to vertical axis and switch to the new mode. */
615 static int omapfb_mirror(struct fb_info *fbi, int mirror)
616 {
617 struct omapfb_plane_struct *plane = fbi->par;
618 struct omapfb_device *fbdev = plane->fbdev;
619 int r = 0;
620
621 omapfb_rqueue_lock(fbdev);
622 mirror = mirror ? 1 : 0;
623 if (cpu_is_omap15xx())
624 r = -EINVAL;
625 else if (mirror != plane->info.mirror) {
626 plane->info.mirror = mirror;
627 r = ctrl_change_mode(fbi);
628 }
629 omapfb_rqueue_unlock(fbdev);
630
631 return r;
632 }
633
634 /*
635 * Check values in var, try to adjust them in case of out of bound values if
636 * possible, or return error.
637 */
638 static int omapfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
639 {
640 struct omapfb_plane_struct *plane = fbi->par;
641 struct omapfb_device *fbdev = plane->fbdev;
642 int r;
643
644 omapfb_rqueue_lock(fbdev);
645 if (fbdev->ctrl->sync != NULL)
646 fbdev->ctrl->sync();
647 r = set_fb_var(fbi, var);
648 omapfb_rqueue_unlock(fbdev);
649
650 return r;
651 }
652
653 /*
654 * Switch to a new mode. The parameters for it has been check already by
655 * omapfb_check_var.
656 */
657 static int omapfb_set_par(struct fb_info *fbi)
658 {
659 struct omapfb_plane_struct *plane = fbi->par;
660 struct omapfb_device *fbdev = plane->fbdev;
661 int r = 0;
662
663 omapfb_rqueue_lock(fbdev);
664 set_fb_fix(fbi, 0);
665 r = ctrl_change_mode(fbi);
666 omapfb_rqueue_unlock(fbdev);
667
668 return r;
669 }
670
671 int omapfb_update_window_async(struct fb_info *fbi,
672 struct omapfb_update_window *win,
673 void (*callback)(void *),
674 void *callback_data)
675 {
676 int xres, yres;
677 struct omapfb_plane_struct *plane = fbi->par;
678 struct omapfb_device *fbdev = plane->fbdev;
679 struct fb_var_screeninfo *var = &fbi->var;
680
681 switch (var->rotate) {
682 case 0:
683 case 180:
684 xres = fbdev->panel->x_res;
685 yres = fbdev->panel->y_res;
686 break;
687 case 90:
688 case 270:
689 xres = fbdev->panel->y_res;
690 yres = fbdev->panel->x_res;
691 break;
692 default:
693 return -EINVAL;
694 }
695
696 if (win->x >= xres || win->y >= yres ||
697 win->out_x > xres || win->out_y > yres)
698 return -EINVAL;
699
700 if (!fbdev->ctrl->update_window ||
701 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
702 return -ENODEV;
703
704 if (win->x + win->width > xres)
705 win->width = xres - win->x;
706 if (win->y + win->height > yres)
707 win->height = yres - win->y;
708 if (win->out_x + win->out_width > xres)
709 win->out_width = xres - win->out_x;
710 if (win->out_y + win->out_height > yres)
711 win->out_height = yres - win->out_y;
712 if (!win->width || !win->height || !win->out_width || !win->out_height)
713 return 0;
714
715 return fbdev->ctrl->update_window(fbi, win, callback, callback_data);
716 }
717 EXPORT_SYMBOL(omapfb_update_window_async);
718
719 static int omapfb_update_win(struct fb_info *fbi,
720 struct omapfb_update_window *win)
721 {
722 struct omapfb_plane_struct *plane = fbi->par;
723 int ret;
724
725 omapfb_rqueue_lock(plane->fbdev);
726 ret = omapfb_update_window_async(fbi, win, NULL, NULL);
727 omapfb_rqueue_unlock(plane->fbdev);
728
729 return ret;
730 }
731
732 static int omapfb_update_full_screen(struct fb_info *fbi)
733 {
734 struct omapfb_plane_struct *plane = fbi->par;
735 struct omapfb_device *fbdev = plane->fbdev;
736 struct omapfb_update_window win;
737 int r;
738
739 if (!fbdev->ctrl->update_window ||
740 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
741 return -ENODEV;
742
743 win.x = 0;
744 win.y = 0;
745 win.width = fbi->var.xres;
746 win.height = fbi->var.yres;
747 win.out_x = 0;
748 win.out_y = 0;
749 win.out_width = fbi->var.xres;
750 win.out_height = fbi->var.yres;
751 win.format = 0;
752
753 omapfb_rqueue_lock(fbdev);
754 r = fbdev->ctrl->update_window(fbi, &win, NULL, NULL);
755 omapfb_rqueue_unlock(fbdev);
756
757 return r;
758 }
759
760 static int omapfb_setup_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
761 {
762 struct omapfb_plane_struct *plane = fbi->par;
763 struct omapfb_device *fbdev = plane->fbdev;
764 struct lcd_panel *panel = fbdev->panel;
765 struct omapfb_plane_info old_info;
766 int r = 0;
767
768 if (pi->pos_x + pi->out_width > panel->x_res ||
769 pi->pos_y + pi->out_height > panel->y_res)
770 return -EINVAL;
771
772 omapfb_rqueue_lock(fbdev);
773 if (pi->enabled && !fbdev->mem_desc.region[plane->idx].size) {
774 /*
775 * This plane's memory was freed, can't enable it
776 * until it's reallocated.
777 */
778 r = -EINVAL;
779 goto out;
780 }
781 old_info = plane->info;
782 plane->info = *pi;
783 if (pi->enabled) {
784 r = ctrl_change_mode(fbi);
785 if (r < 0) {
786 plane->info = old_info;
787 goto out;
788 }
789 }
790 r = fbdev->ctrl->enable_plane(plane->idx, pi->enabled);
791 if (r < 0) {
792 plane->info = old_info;
793 goto out;
794 }
795 out:
796 omapfb_rqueue_unlock(fbdev);
797 return r;
798 }
799
800 static int omapfb_query_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
801 {
802 struct omapfb_plane_struct *plane = fbi->par;
803
804 *pi = plane->info;
805 return 0;
806 }
807
808 static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
809 {
810 struct omapfb_plane_struct *plane = fbi->par;
811 struct omapfb_device *fbdev = plane->fbdev;
812 struct omapfb_mem_region *rg = &fbdev->mem_desc.region[plane->idx];
813 size_t size;
814 int r = 0;
815
816 if (fbdev->ctrl->setup_mem == NULL)
817 return -ENODEV;
818 if (mi->type != OMAPFB_MEMTYPE_SDRAM)
819 return -EINVAL;
820
821 size = PAGE_ALIGN(mi->size);
822 omapfb_rqueue_lock(fbdev);
823 if (plane->info.enabled) {
824 r = -EBUSY;
825 goto out;
826 }
827 if (rg->size != size || rg->type != mi->type) {
828 struct fb_var_screeninfo *new_var = &fbdev->new_var;
829 unsigned long old_size = rg->size;
830 u8 old_type = rg->type;
831 unsigned long paddr;
832
833 rg->size = size;
834 rg->type = mi->type;
835 /*
836 * size == 0 is a special case, for which we
837 * don't check / adjust the screen parameters.
838 * This isn't a problem since the plane can't
839 * be reenabled unless its size is > 0.
840 */
841 if (old_size != size && size) {
842 if (size) {
843 memcpy(new_var, &fbi->var, sizeof(*new_var));
844 r = set_fb_var(fbi, new_var);
845 if (r < 0)
846 goto out;
847 }
848 }
849
850 if (fbdev->ctrl->sync)
851 fbdev->ctrl->sync();
852 r = fbdev->ctrl->setup_mem(plane->idx, size, mi->type, &paddr);
853 if (r < 0) {
854 /* Revert changes. */
855 rg->size = old_size;
856 rg->type = old_type;
857 goto out;
858 }
859 rg->paddr = paddr;
860
861 if (old_size != size) {
862 if (size) {
863 memcpy(&fbi->var, new_var, sizeof(fbi->var));
864 set_fb_fix(fbi, 0);
865 } else {
866 /*
867 * Set these explicitly to indicate that the
868 * plane memory is dealloce'd, the other
869 * screen parameters in var / fix are invalid.
870 */
871 mutex_lock(&fbi->mm_lock);
872 fbi->fix.smem_start = 0;
873 fbi->fix.smem_len = 0;
874 mutex_unlock(&fbi->mm_lock);
875 }
876 }
877 }
878 out:
879 omapfb_rqueue_unlock(fbdev);
880
881 return r;
882 }
883
884 static int omapfb_query_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
885 {
886 struct omapfb_plane_struct *plane = fbi->par;
887 struct omapfb_device *fbdev = plane->fbdev;
888 struct omapfb_mem_region *rg;
889
890 rg = &fbdev->mem_desc.region[plane->idx];
891 memset(mi, 0, sizeof(*mi));
892 mi->size = rg->size;
893 mi->type = rg->type;
894
895 return 0;
896 }
897
898 static int omapfb_set_color_key(struct omapfb_device *fbdev,
899 struct omapfb_color_key *ck)
900 {
901 int r;
902
903 if (!fbdev->ctrl->set_color_key)
904 return -ENODEV;
905
906 omapfb_rqueue_lock(fbdev);
907 r = fbdev->ctrl->set_color_key(ck);
908 omapfb_rqueue_unlock(fbdev);
909
910 return r;
911 }
912
913 static int omapfb_get_color_key(struct omapfb_device *fbdev,
914 struct omapfb_color_key *ck)
915 {
916 int r;
917
918 if (!fbdev->ctrl->get_color_key)
919 return -ENODEV;
920
921 omapfb_rqueue_lock(fbdev);
922 r = fbdev->ctrl->get_color_key(ck);
923 omapfb_rqueue_unlock(fbdev);
924
925 return r;
926 }
927
928 static struct blocking_notifier_head omapfb_client_list[OMAPFB_PLANE_NUM];
929 static int notifier_inited;
930
931 static void omapfb_init_notifier(void)
932 {
933 int i;
934
935 for (i = 0; i < OMAPFB_PLANE_NUM; i++)
936 BLOCKING_INIT_NOTIFIER_HEAD(&omapfb_client_list[i]);
937 }
938
939 int omapfb_register_client(struct omapfb_notifier_block *omapfb_nb,
940 omapfb_notifier_callback_t callback,
941 void *callback_data)
942 {
943 int r;
944
945 if ((unsigned)omapfb_nb->plane_idx >= OMAPFB_PLANE_NUM)
946 return -EINVAL;
947
948 if (!notifier_inited) {
949 omapfb_init_notifier();
950 notifier_inited = 1;
951 }
952
953 omapfb_nb->nb.notifier_call = (int (*)(struct notifier_block *,
954 unsigned long, void *))callback;
955 omapfb_nb->data = callback_data;
956 r = blocking_notifier_chain_register(
957 &omapfb_client_list[omapfb_nb->plane_idx],
958 &omapfb_nb->nb);
959 if (r)
960 return r;
961 if (omapfb_dev != NULL &&
962 omapfb_dev->ctrl && omapfb_dev->ctrl->bind_client) {
963 omapfb_dev->ctrl->bind_client(omapfb_nb);
964 }
965
966 return 0;
967 }
968 EXPORT_SYMBOL(omapfb_register_client);
969
970 int omapfb_unregister_client(struct omapfb_notifier_block *omapfb_nb)
971 {
972 return blocking_notifier_chain_unregister(
973 &omapfb_client_list[omapfb_nb->plane_idx], &omapfb_nb->nb);
974 }
975 EXPORT_SYMBOL(omapfb_unregister_client);
976
977 void omapfb_notify_clients(struct omapfb_device *fbdev, unsigned long event)
978 {
979 int i;
980
981 if (!notifier_inited)
982 /* no client registered yet */
983 return;
984
985 for (i = 0; i < OMAPFB_PLANE_NUM; i++)
986 blocking_notifier_call_chain(&omapfb_client_list[i], event,
987 fbdev->fb_info[i]);
988 }
989 EXPORT_SYMBOL(omapfb_notify_clients);
990
991 static int omapfb_set_update_mode(struct omapfb_device *fbdev,
992 enum omapfb_update_mode mode)
993 {
994 int r;
995
996 omapfb_rqueue_lock(fbdev);
997 r = fbdev->ctrl->set_update_mode(mode);
998 omapfb_rqueue_unlock(fbdev);
999
1000 return r;
1001 }
1002
1003 static enum omapfb_update_mode omapfb_get_update_mode(struct omapfb_device *fbdev)
1004 {
1005 int r;
1006
1007 omapfb_rqueue_lock(fbdev);
1008 r = fbdev->ctrl->get_update_mode();
1009 omapfb_rqueue_unlock(fbdev);
1010
1011 return r;
1012 }
1013
1014 static void omapfb_get_caps(struct omapfb_device *fbdev, int plane,
1015 struct omapfb_caps *caps)
1016 {
1017 memset(caps, 0, sizeof(*caps));
1018 fbdev->ctrl->get_caps(plane, caps);
1019 if (fbdev->panel->get_caps)
1020 caps->ctrl |= fbdev->panel->get_caps(fbdev->panel);
1021 }
1022
1023 /* For lcd testing */
1024 void omapfb_write_first_pixel(struct omapfb_device *fbdev, u16 pixval)
1025 {
1026 omapfb_rqueue_lock(fbdev);
1027 *(u16 *)fbdev->mem_desc.region[0].vaddr = pixval;
1028 if (fbdev->ctrl->get_update_mode() == OMAPFB_MANUAL_UPDATE) {
1029 struct omapfb_update_window win;
1030
1031 memset(&win, 0, sizeof(win));
1032 win.width = 2;
1033 win.height = 2;
1034 win.out_width = 2;
1035 win.out_height = 2;
1036 fbdev->ctrl->update_window(fbdev->fb_info[0], &win, NULL, NULL);
1037 }
1038 omapfb_rqueue_unlock(fbdev);
1039 }
1040 EXPORT_SYMBOL(omapfb_write_first_pixel);
1041
1042 /*
1043 * Ioctl interface. Part of the kernel mode frame buffer API is duplicated
1044 * here to be accessible by user mode code.
1045 */
1046 static int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd,
1047 unsigned long arg)
1048 {
1049 struct omapfb_plane_struct *plane = fbi->par;
1050 struct omapfb_device *fbdev = plane->fbdev;
1051 const struct fb_ops *ops = fbi->fbops;
1052 union {
1053 struct omapfb_update_window update_window;
1054 struct omapfb_plane_info plane_info;
1055 struct omapfb_mem_info mem_info;
1056 struct omapfb_color_key color_key;
1057 enum omapfb_update_mode update_mode;
1058 struct omapfb_caps caps;
1059 unsigned int mirror;
1060 int plane_out;
1061 int enable_plane;
1062 } p;
1063 int r = 0;
1064
1065 BUG_ON(!ops);
1066 switch (cmd) {
1067 case OMAPFB_MIRROR:
1068 if (get_user(p.mirror, (int __user *)arg))
1069 r = -EFAULT;
1070 else
1071 omapfb_mirror(fbi, p.mirror);
1072 break;
1073 case OMAPFB_SYNC_GFX:
1074 omapfb_sync(fbi);
1075 break;
1076 case OMAPFB_VSYNC:
1077 break;
1078 case OMAPFB_SET_UPDATE_MODE:
1079 if (get_user(p.update_mode, (int __user *)arg))
1080 r = -EFAULT;
1081 else
1082 r = omapfb_set_update_mode(fbdev, p.update_mode);
1083 break;
1084 case OMAPFB_GET_UPDATE_MODE:
1085 p.update_mode = omapfb_get_update_mode(fbdev);
1086 if (put_user(p.update_mode,
1087 (enum omapfb_update_mode __user *)arg))
1088 r = -EFAULT;
1089 break;
1090 case OMAPFB_UPDATE_WINDOW_OLD:
1091 if (copy_from_user(&p.update_window, (void __user *)arg,
1092 sizeof(struct omapfb_update_window_old)))
1093 r = -EFAULT;
1094 else {
1095 struct omapfb_update_window *u = &p.update_window;
1096 u->out_x = u->x;
1097 u->out_y = u->y;
1098 u->out_width = u->width;
1099 u->out_height = u->height;
1100 memset(u->reserved, 0, sizeof(u->reserved));
1101 r = omapfb_update_win(fbi, u);
1102 }
1103 break;
1104 case OMAPFB_UPDATE_WINDOW:
1105 if (copy_from_user(&p.update_window, (void __user *)arg,
1106 sizeof(p.update_window)))
1107 r = -EFAULT;
1108 else
1109 r = omapfb_update_win(fbi, &p.update_window);
1110 break;
1111 case OMAPFB_SETUP_PLANE:
1112 if (copy_from_user(&p.plane_info, (void __user *)arg,
1113 sizeof(p.plane_info)))
1114 r = -EFAULT;
1115 else
1116 r = omapfb_setup_plane(fbi, &p.plane_info);
1117 break;
1118 case OMAPFB_QUERY_PLANE:
1119 if ((r = omapfb_query_plane(fbi, &p.plane_info)) < 0)
1120 break;
1121 if (copy_to_user((void __user *)arg, &p.plane_info,
1122 sizeof(p.plane_info)))
1123 r = -EFAULT;
1124 break;
1125 case OMAPFB_SETUP_MEM:
1126 if (copy_from_user(&p.mem_info, (void __user *)arg,
1127 sizeof(p.mem_info)))
1128 r = -EFAULT;
1129 else
1130 r = omapfb_setup_mem(fbi, &p.mem_info);
1131 break;
1132 case OMAPFB_QUERY_MEM:
1133 if ((r = omapfb_query_mem(fbi, &p.mem_info)) < 0)
1134 break;
1135 if (copy_to_user((void __user *)arg, &p.mem_info,
1136 sizeof(p.mem_info)))
1137 r = -EFAULT;
1138 break;
1139 case OMAPFB_SET_COLOR_KEY:
1140 if (copy_from_user(&p.color_key, (void __user *)arg,
1141 sizeof(p.color_key)))
1142 r = -EFAULT;
1143 else
1144 r = omapfb_set_color_key(fbdev, &p.color_key);
1145 break;
1146 case OMAPFB_GET_COLOR_KEY:
1147 if ((r = omapfb_get_color_key(fbdev, &p.color_key)) < 0)
1148 break;
1149 if (copy_to_user((void __user *)arg, &p.color_key,
1150 sizeof(p.color_key)))
1151 r = -EFAULT;
1152 break;
1153 case OMAPFB_GET_CAPS:
1154 omapfb_get_caps(fbdev, plane->idx, &p.caps);
1155 if (copy_to_user((void __user *)arg, &p.caps, sizeof(p.caps)))
1156 r = -EFAULT;
1157 break;
1158 case OMAPFB_LCD_TEST:
1159 {
1160 int test_num;
1161
1162 if (get_user(test_num, (int __user *)arg)) {
1163 r = -EFAULT;
1164 break;
1165 }
1166 if (!fbdev->panel->run_test) {
1167 r = -EINVAL;
1168 break;
1169 }
1170 r = fbdev->panel->run_test(fbdev->panel, test_num);
1171 break;
1172 }
1173 case OMAPFB_CTRL_TEST:
1174 {
1175 int test_num;
1176
1177 if (get_user(test_num, (int __user *)arg)) {
1178 r = -EFAULT;
1179 break;
1180 }
1181 if (!fbdev->ctrl->run_test) {
1182 r = -EINVAL;
1183 break;
1184 }
1185 r = fbdev->ctrl->run_test(test_num);
1186 break;
1187 }
1188 default:
1189 r = -EINVAL;
1190 }
1191
1192 return r;
1193 }
1194
1195 static int omapfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
1196 {
1197 struct omapfb_plane_struct *plane = info->par;
1198 struct omapfb_device *fbdev = plane->fbdev;
1199 int r;
1200
1201 omapfb_rqueue_lock(fbdev);
1202 r = fbdev->ctrl->mmap(info, vma);
1203 omapfb_rqueue_unlock(fbdev);
1204
1205 return r;
1206 }
1207
1208 /*
1209 * Callback table for the frame buffer framework. Some of these pointers
1210 * will be changed according to the current setting of fb_info->accel_flags.
1211 */
1212 static struct fb_ops omapfb_ops = {
1213 .owner = THIS_MODULE,
1214 .fb_open = omapfb_open,
1215 .fb_release = omapfb_release,
1216 .fb_setcolreg = omapfb_setcolreg,
1217 .fb_setcmap = omapfb_setcmap,
1218 .fb_fillrect = cfb_fillrect,
1219 .fb_copyarea = cfb_copyarea,
1220 .fb_imageblit = cfb_imageblit,
1221 .fb_blank = omapfb_blank,
1222 .fb_ioctl = omapfb_ioctl,
1223 .fb_check_var = omapfb_check_var,
1224 .fb_set_par = omapfb_set_par,
1225 .fb_pan_display = omapfb_pan_display,
1226 };
1227
1228 /*
1229 * ---------------------------------------------------------------------------
1230 * Sysfs interface
1231 * ---------------------------------------------------------------------------
1232 */
1233 /* omapfbX sysfs entries */
1234 static ssize_t omapfb_show_caps_num(struct device *dev,
1235 struct device_attribute *attr, char *buf)
1236 {
1237 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1238 int plane;
1239 size_t size;
1240 struct omapfb_caps caps;
1241
1242 plane = 0;
1243 size = 0;
1244 while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1245 omapfb_get_caps(fbdev, plane, &caps);
1246 size += scnprintf(&buf[size], PAGE_SIZE - size,
1247 "plane#%d %#010x %#010x %#010x\n",
1248 plane, caps.ctrl, caps.plane_color, caps.wnd_color);
1249 plane++;
1250 }
1251 return size;
1252 }
1253
1254 static ssize_t omapfb_show_caps_text(struct device *dev,
1255 struct device_attribute *attr, char *buf)
1256 {
1257 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1258 int i;
1259 struct omapfb_caps caps;
1260 int plane;
1261 size_t size;
1262
1263 plane = 0;
1264 size = 0;
1265 while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1266 omapfb_get_caps(fbdev, plane, &caps);
1267 size += scnprintf(&buf[size], PAGE_SIZE - size,
1268 "plane#%d:\n", plane);
1269 for (i = 0; i < ARRAY_SIZE(ctrl_caps) &&
1270 size < PAGE_SIZE; i++) {
1271 if (ctrl_caps[i].flag & caps.ctrl)
1272 size += scnprintf(&buf[size], PAGE_SIZE - size,
1273 " %s\n", ctrl_caps[i].name);
1274 }
1275 size += scnprintf(&buf[size], PAGE_SIZE - size,
1276 " plane colors:\n");
1277 for (i = 0; i < ARRAY_SIZE(color_caps) &&
1278 size < PAGE_SIZE; i++) {
1279 if (color_caps[i].flag & caps.plane_color)
1280 size += scnprintf(&buf[size], PAGE_SIZE - size,
1281 " %s\n", color_caps[i].name);
1282 }
1283 size += scnprintf(&buf[size], PAGE_SIZE - size,
1284 " window colors:\n");
1285 for (i = 0; i < ARRAY_SIZE(color_caps) &&
1286 size < PAGE_SIZE; i++) {
1287 if (color_caps[i].flag & caps.wnd_color)
1288 size += scnprintf(&buf[size], PAGE_SIZE - size,
1289 " %s\n", color_caps[i].name);
1290 }
1291
1292 plane++;
1293 }
1294 return size;
1295 }
1296
1297 static DEVICE_ATTR(caps_num, 0444, omapfb_show_caps_num, NULL);
1298 static DEVICE_ATTR(caps_text, 0444, omapfb_show_caps_text, NULL);
1299
1300 /* panel sysfs entries */
1301 static ssize_t omapfb_show_panel_name(struct device *dev,
1302 struct device_attribute *attr, char *buf)
1303 {
1304 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1305
1306 return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->panel->name);
1307 }
1308
1309 static ssize_t omapfb_show_bklight_level(struct device *dev,
1310 struct device_attribute *attr,
1311 char *buf)
1312 {
1313 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1314 int r;
1315
1316 if (fbdev->panel->get_bklight_level) {
1317 r = snprintf(buf, PAGE_SIZE, "%d\n",
1318 fbdev->panel->get_bklight_level(fbdev->panel));
1319 } else
1320 r = -ENODEV;
1321 return r;
1322 }
1323
1324 static ssize_t omapfb_store_bklight_level(struct device *dev,
1325 struct device_attribute *attr,
1326 const char *buf, size_t size)
1327 {
1328 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1329 int r;
1330
1331 if (fbdev->panel->set_bklight_level) {
1332 unsigned int level;
1333
1334 if (sscanf(buf, "%10d", &level) == 1) {
1335 r = fbdev->panel->set_bklight_level(fbdev->panel,
1336 level);
1337 } else
1338 r = -EINVAL;
1339 } else
1340 r = -ENODEV;
1341 return r ? r : size;
1342 }
1343
1344 static ssize_t omapfb_show_bklight_max(struct device *dev,
1345 struct device_attribute *attr, char *buf)
1346 {
1347 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1348 int r;
1349
1350 if (fbdev->panel->get_bklight_level) {
1351 r = snprintf(buf, PAGE_SIZE, "%d\n",
1352 fbdev->panel->get_bklight_max(fbdev->panel));
1353 } else
1354 r = -ENODEV;
1355 return r;
1356 }
1357
1358 static struct device_attribute dev_attr_panel_name =
1359 __ATTR(name, 0444, omapfb_show_panel_name, NULL);
1360 static DEVICE_ATTR(backlight_level, 0664,
1361 omapfb_show_bklight_level, omapfb_store_bklight_level);
1362 static DEVICE_ATTR(backlight_max, 0444, omapfb_show_bklight_max, NULL);
1363
1364 static struct attribute *panel_attrs[] = {
1365 &dev_attr_panel_name.attr,
1366 &dev_attr_backlight_level.attr,
1367 &dev_attr_backlight_max.attr,
1368 NULL,
1369 };
1370
1371 static const struct attribute_group panel_attr_grp = {
1372 .name = "panel",
1373 .attrs = panel_attrs,
1374 };
1375
1376 /* ctrl sysfs entries */
1377 static ssize_t omapfb_show_ctrl_name(struct device *dev,
1378 struct device_attribute *attr, char *buf)
1379 {
1380 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1381
1382 return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->ctrl->name);
1383 }
1384
1385 static struct device_attribute dev_attr_ctrl_name =
1386 __ATTR(name, 0444, omapfb_show_ctrl_name, NULL);
1387
1388 static struct attribute *ctrl_attrs[] = {
1389 &dev_attr_ctrl_name.attr,
1390 NULL,
1391 };
1392
1393 static const struct attribute_group ctrl_attr_grp = {
1394 .name = "ctrl",
1395 .attrs = ctrl_attrs,
1396 };
1397
1398 static int omapfb_register_sysfs(struct omapfb_device *fbdev)
1399 {
1400 int r;
1401
1402 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_num)))
1403 goto fail0;
1404
1405 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_text)))
1406 goto fail1;
1407
1408 if ((r = sysfs_create_group(&fbdev->dev->kobj, &panel_attr_grp)))
1409 goto fail2;
1410
1411 if ((r = sysfs_create_group(&fbdev->dev->kobj, &ctrl_attr_grp)))
1412 goto fail3;
1413
1414 return 0;
1415 fail3:
1416 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1417 fail2:
1418 device_remove_file(fbdev->dev, &dev_attr_caps_text);
1419 fail1:
1420 device_remove_file(fbdev->dev, &dev_attr_caps_num);
1421 fail0:
1422 dev_err(fbdev->dev, "unable to register sysfs interface\n");
1423 return r;
1424 }
1425
1426 static void omapfb_unregister_sysfs(struct omapfb_device *fbdev)
1427 {
1428 sysfs_remove_group(&fbdev->dev->kobj, &ctrl_attr_grp);
1429 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1430 device_remove_file(fbdev->dev, &dev_attr_caps_num);
1431 device_remove_file(fbdev->dev, &dev_attr_caps_text);
1432 }
1433
1434 /*
1435 * ---------------------------------------------------------------------------
1436 * LDM callbacks
1437 * ---------------------------------------------------------------------------
1438 */
1439 /* Initialize system fb_info object and set the default video mode.
1440 * The frame buffer memory already allocated by lcddma_init
1441 */
1442 static int fbinfo_init(struct omapfb_device *fbdev, struct fb_info *info)
1443 {
1444 struct fb_var_screeninfo *var = &info->var;
1445 struct fb_fix_screeninfo *fix = &info->fix;
1446 int r = 0;
1447
1448 info->fbops = &omapfb_ops;
1449 info->flags = FBINFO_FLAG_DEFAULT;
1450
1451 strncpy(fix->id, MODULE_NAME, sizeof(fix->id));
1452
1453 info->pseudo_palette = fbdev->pseudo_palette;
1454
1455 var->accel_flags = def_accel ? FB_ACCELF_TEXT : 0;
1456 var->xres = def_vxres;
1457 var->yres = def_vyres;
1458 var->xres_virtual = def_vxres;
1459 var->yres_virtual = def_vyres;
1460 var->rotate = def_rotate;
1461 var->bits_per_pixel = fbdev->panel->bpp;
1462
1463 set_fb_var(info, var);
1464 set_fb_fix(info, 1);
1465
1466 r = fb_alloc_cmap(&info->cmap, 16, 0);
1467 if (r != 0)
1468 dev_err(fbdev->dev, "unable to allocate color map memory\n");
1469
1470 return r;
1471 }
1472
1473 /* Release the fb_info object */
1474 static void fbinfo_cleanup(struct omapfb_device *fbdev, struct fb_info *fbi)
1475 {
1476 fb_dealloc_cmap(&fbi->cmap);
1477 }
1478
1479 static void planes_cleanup(struct omapfb_device *fbdev)
1480 {
1481 int i;
1482
1483 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1484 if (fbdev->fb_info[i] == NULL)
1485 break;
1486 fbinfo_cleanup(fbdev, fbdev->fb_info[i]);
1487 framebuffer_release(fbdev->fb_info[i]);
1488 }
1489 }
1490
1491 static int planes_init(struct omapfb_device *fbdev)
1492 {
1493 struct fb_info *fbi;
1494 int i;
1495 int r;
1496
1497 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1498 struct omapfb_plane_struct *plane;
1499 fbi = framebuffer_alloc(sizeof(struct omapfb_plane_struct),
1500 fbdev->dev);
1501 if (fbi == NULL) {
1502 planes_cleanup(fbdev);
1503 return -ENOMEM;
1504 }
1505 plane = fbi->par;
1506 plane->idx = i;
1507 plane->fbdev = fbdev;
1508 plane->info.mirror = def_mirror;
1509 fbdev->fb_info[i] = fbi;
1510
1511 if ((r = fbinfo_init(fbdev, fbi)) < 0) {
1512 framebuffer_release(fbi);
1513 planes_cleanup(fbdev);
1514 return r;
1515 }
1516 plane->info.out_width = fbi->var.xres;
1517 plane->info.out_height = fbi->var.yres;
1518 }
1519 return 0;
1520 }
1521
1522 /*
1523 * Free driver resources. Can be called to rollback an aborted initialization
1524 * sequence.
1525 */
1526 static void omapfb_free_resources(struct omapfb_device *fbdev, int state)
1527 {
1528 int i;
1529
1530 switch (state) {
1531 case OMAPFB_ACTIVE:
1532 for (i = 0; i < fbdev->mem_desc.region_cnt; i++)
1533 unregister_framebuffer(fbdev->fb_info[i]);
1534 fallthrough;
1535 case 7:
1536 omapfb_unregister_sysfs(fbdev);
1537 fallthrough;
1538 case 6:
1539 if (fbdev->panel->disable)
1540 fbdev->panel->disable(fbdev->panel);
1541 fallthrough;
1542 case 5:
1543 omapfb_set_update_mode(fbdev, OMAPFB_UPDATE_DISABLED);
1544 fallthrough;
1545 case 4:
1546 planes_cleanup(fbdev);
1547 fallthrough;
1548 case 3:
1549 ctrl_cleanup(fbdev);
1550 fallthrough;
1551 case 2:
1552 if (fbdev->panel->cleanup)
1553 fbdev->panel->cleanup(fbdev->panel);
1554 fallthrough;
1555 case 1:
1556 dev_set_drvdata(fbdev->dev, NULL);
1557 kfree(fbdev);
1558 case 0:
1559 /* nothing to free */
1560 break;
1561 default:
1562 BUG();
1563 }
1564 }
1565
1566 static int omapfb_find_ctrl(struct omapfb_device *fbdev)
1567 {
1568 struct omapfb_platform_data *conf;
1569 char name[17];
1570 int i;
1571
1572 conf = dev_get_platdata(fbdev->dev);
1573
1574 fbdev->ctrl = NULL;
1575
1576 strncpy(name, conf->lcd.ctrl_name, sizeof(name) - 1);
1577 name[sizeof(name) - 1] = '\0';
1578
1579 if (strcmp(name, "internal") == 0) {
1580 fbdev->ctrl = fbdev->int_ctrl;
1581 return 0;
1582 }
1583
1584 for (i = 0; i < ARRAY_SIZE(ctrls); i++) {
1585 dev_dbg(fbdev->dev, "ctrl %s\n", ctrls[i]->name);
1586 if (strcmp(ctrls[i]->name, name) == 0) {
1587 fbdev->ctrl = ctrls[i];
1588 break;
1589 }
1590 }
1591
1592 if (fbdev->ctrl == NULL) {
1593 dev_dbg(fbdev->dev, "ctrl %s not supported\n", name);
1594 return -1;
1595 }
1596
1597 return 0;
1598 }
1599
1600 /*
1601 * Called by LDM binding to probe and attach a new device.
1602 * Initialization sequence:
1603 * 1. allocate system omapfb_device structure
1604 * 2. select controller type according to platform configuration
1605 * init LCD panel
1606 * 3. init LCD controller and LCD DMA
1607 * 4. init system fb_info structure for all planes
1608 * 5. setup video mode for first plane and enable it
1609 * 6. enable LCD panel
1610 * 7. register sysfs attributes
1611 * OMAPFB_ACTIVE: register system fb_info structure for all planes
1612 */
1613 static int omapfb_do_probe(struct platform_device *pdev,
1614 struct lcd_panel *panel)
1615 {
1616 struct omapfb_device *fbdev = NULL;
1617 int init_state;
1618 unsigned long phz, hhz, vhz;
1619 unsigned long vram;
1620 int i;
1621 int r = 0;
1622
1623 init_state = 0;
1624
1625 if (pdev->num_resources != 0) {
1626 dev_err(&pdev->dev, "probed for an unknown device\n");
1627 r = -ENODEV;
1628 goto cleanup;
1629 }
1630
1631 if (dev_get_platdata(&pdev->dev) == NULL) {
1632 dev_err(&pdev->dev, "missing platform data\n");
1633 r = -ENOENT;
1634 goto cleanup;
1635 }
1636
1637 fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
1638 if (fbdev == NULL) {
1639 dev_err(&pdev->dev,
1640 "unable to allocate memory for device info\n");
1641 r = -ENOMEM;
1642 goto cleanup;
1643 }
1644 init_state++;
1645
1646 fbdev->dev = &pdev->dev;
1647 fbdev->panel = panel;
1648 fbdev->dssdev = &omapdss_device;
1649 platform_set_drvdata(pdev, fbdev);
1650
1651 mutex_init(&fbdev->rqueue_mutex);
1652
1653 fbdev->int_ctrl = &omap1_int_ctrl;
1654 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
1655 fbdev->ext_if = &omap1_ext_if;
1656 #endif
1657 if (omapfb_find_ctrl(fbdev) < 0) {
1658 dev_err(fbdev->dev,
1659 "LCD controller not found, board not supported\n");
1660 r = -ENODEV;
1661 goto cleanup;
1662 }
1663
1664 if (fbdev->panel->init) {
1665 r = fbdev->panel->init(fbdev->panel, fbdev);
1666 if (r)
1667 goto cleanup;
1668 }
1669
1670 pr_info("omapfb: configured for panel %s\n", fbdev->panel->name);
1671
1672 def_vxres = def_vxres ? def_vxres : fbdev->panel->x_res;
1673 def_vyres = def_vyres ? def_vyres : fbdev->panel->y_res;
1674
1675 init_state++;
1676
1677 r = ctrl_init(fbdev);
1678 if (r)
1679 goto cleanup;
1680 if (fbdev->ctrl->mmap != NULL)
1681 omapfb_ops.fb_mmap = omapfb_mmap;
1682 init_state++;
1683
1684 r = planes_init(fbdev);
1685 if (r)
1686 goto cleanup;
1687 init_state++;
1688
1689 #ifdef CONFIG_FB_OMAP_DMA_TUNE
1690 /* Set DMA priority for EMIFF access to highest */
1691 omap_set_dma_priority(0, OMAP_DMA_PORT_EMIFF, 15);
1692 #endif
1693
1694 r = ctrl_change_mode(fbdev->fb_info[0]);
1695 if (r) {
1696 dev_err(fbdev->dev, "mode setting failed\n");
1697 goto cleanup;
1698 }
1699
1700 /* GFX plane is enabled by default */
1701 r = fbdev->ctrl->enable_plane(OMAPFB_PLANE_GFX, 1);
1702 if (r)
1703 goto cleanup;
1704
1705 omapfb_set_update_mode(fbdev, manual_update ?
1706 OMAPFB_MANUAL_UPDATE : OMAPFB_AUTO_UPDATE);
1707 init_state++;
1708
1709 if (fbdev->panel->enable) {
1710 r = fbdev->panel->enable(fbdev->panel);
1711 if (r)
1712 goto cleanup;
1713 }
1714 init_state++;
1715
1716 r = omapfb_register_sysfs(fbdev);
1717 if (r)
1718 goto cleanup;
1719 init_state++;
1720
1721 vram = 0;
1722 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1723 r = register_framebuffer(fbdev->fb_info[i]);
1724 if (r != 0) {
1725 dev_err(fbdev->dev,
1726 "registering framebuffer %d failed\n", i);
1727 goto cleanup;
1728 }
1729 vram += fbdev->mem_desc.region[i].size;
1730 }
1731
1732 fbdev->state = OMAPFB_ACTIVE;
1733
1734 panel = fbdev->panel;
1735 phz = panel->pixel_clock * 1000;
1736 hhz = phz * 10 / (panel->hfp + panel->x_res + panel->hbp + panel->hsw);
1737 vhz = hhz / (panel->vfp + panel->y_res + panel->vbp + panel->vsw);
1738
1739 omapfb_dev = fbdev;
1740
1741 pr_info("omapfb: Framebuffer initialized. Total vram %lu planes %d\n",
1742 vram, fbdev->mem_desc.region_cnt);
1743 pr_info("omapfb: Pixclock %lu kHz hfreq %lu.%lu kHz "
1744 "vfreq %lu.%lu Hz\n",
1745 phz / 1000, hhz / 10000, hhz % 10, vhz / 10, vhz % 10);
1746
1747 return 0;
1748
1749 cleanup:
1750 omapfb_free_resources(fbdev, init_state);
1751
1752 return r;
1753 }
1754
1755 static int omapfb_probe(struct platform_device *pdev)
1756 {
1757 int r;
1758
1759 BUG_ON(fbdev_pdev != NULL);
1760
1761 r = platform_device_register(&omapdss_device);
1762 if (r) {
1763 dev_err(&pdev->dev, "can't register omapdss device\n");
1764 return r;
1765 }
1766
1767 /* Delay actual initialization until the LCD is registered */
1768 fbdev_pdev = pdev;
1769 if (fbdev_panel != NULL)
1770 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1771 return 0;
1772 }
1773
1774 void omapfb_register_panel(struct lcd_panel *panel)
1775 {
1776 BUG_ON(fbdev_panel != NULL);
1777
1778 fbdev_panel = panel;
1779 if (fbdev_pdev != NULL)
1780 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1781 }
1782 EXPORT_SYMBOL_GPL(omapfb_register_panel);
1783
1784 /* Called when the device is being detached from the driver */
1785 static int omapfb_remove(struct platform_device *pdev)
1786 {
1787 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1788 enum omapfb_state saved_state = fbdev->state;
1789
1790 /* FIXME: wait till completion of pending events */
1791
1792 fbdev->state = OMAPFB_DISABLED;
1793 omapfb_free_resources(fbdev, saved_state);
1794
1795 platform_device_unregister(&omapdss_device);
1796 fbdev->dssdev = NULL;
1797
1798 return 0;
1799 }
1800
1801 /* PM suspend */
1802 static int omapfb_suspend(struct platform_device *pdev, pm_message_t mesg)
1803 {
1804 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1805
1806 if (fbdev != NULL)
1807 omapfb_blank(FB_BLANK_POWERDOWN, fbdev->fb_info[0]);
1808 return 0;
1809 }
1810
1811 /* PM resume */
1812 static int omapfb_resume(struct platform_device *pdev)
1813 {
1814 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1815
1816 if (fbdev != NULL)
1817 omapfb_blank(FB_BLANK_UNBLANK, fbdev->fb_info[0]);
1818 return 0;
1819 }
1820
1821 static struct platform_driver omapfb_driver = {
1822 .probe = omapfb_probe,
1823 .remove = omapfb_remove,
1824 .suspend = omapfb_suspend,
1825 .resume = omapfb_resume,
1826 .driver = {
1827 .name = MODULE_NAME,
1828 },
1829 };
1830
1831 #ifndef MODULE
1832
1833 /* Process kernel command line parameters */
1834 static int __init omapfb_setup(char *options)
1835 {
1836 char *this_opt = NULL;
1837 int r = 0;
1838
1839 pr_debug("omapfb: options %s\n", options);
1840
1841 if (!options || !*options)
1842 return 0;
1843
1844 while (!r && (this_opt = strsep(&options, ",")) != NULL) {
1845 if (!strncmp(this_opt, "accel", 5))
1846 def_accel = 1;
1847 else if (!strncmp(this_opt, "vram:", 5)) {
1848 char *suffix;
1849 unsigned long vram;
1850 vram = (simple_strtoul(this_opt + 5, &suffix, 0));
1851 switch (suffix[0]) {
1852 case '\0':
1853 break;
1854 case 'm':
1855 case 'M':
1856 vram *= 1024;
1857 fallthrough;
1858 case 'k':
1859 case 'K':
1860 vram *= 1024;
1861 break;
1862 default:
1863 pr_debug("omapfb: invalid vram suffix %c\n",
1864 suffix[0]);
1865 r = -1;
1866 }
1867 def_vram[def_vram_cnt++] = vram;
1868 }
1869 else if (!strncmp(this_opt, "vxres:", 6))
1870 def_vxres = simple_strtoul(this_opt + 6, NULL, 0);
1871 else if (!strncmp(this_opt, "vyres:", 6))
1872 def_vyres = simple_strtoul(this_opt + 6, NULL, 0);
1873 else if (!strncmp(this_opt, "rotate:", 7))
1874 def_rotate = (simple_strtoul(this_opt + 7, NULL, 0));
1875 else if (!strncmp(this_opt, "mirror:", 7))
1876 def_mirror = (simple_strtoul(this_opt + 7, NULL, 0));
1877 else if (!strncmp(this_opt, "manual_update", 13))
1878 manual_update = 1;
1879 else {
1880 pr_debug("omapfb: invalid option\n");
1881 r = -1;
1882 }
1883 }
1884
1885 return r;
1886 }
1887
1888 #endif
1889
1890 /* Register both the driver and the device */
1891 static int __init omapfb_init(void)
1892 {
1893 #ifndef MODULE
1894 char *option;
1895
1896 if (fb_get_options("omapfb", &option))
1897 return -ENODEV;
1898 omapfb_setup(option);
1899 #endif
1900 /* Register the driver with LDM */
1901 if (platform_driver_register(&omapfb_driver)) {
1902 pr_debug("failed to register omapfb driver\n");
1903 return -ENODEV;
1904 }
1905
1906 return 0;
1907 }
1908
1909 static void __exit omapfb_cleanup(void)
1910 {
1911 platform_driver_unregister(&omapfb_driver);
1912 }
1913
1914 module_param_named(accel, def_accel, uint, 0664);
1915 module_param_array_named(vram, def_vram, ulong, &def_vram_cnt, 0664);
1916 module_param_named(vxres, def_vxres, long, 0664);
1917 module_param_named(vyres, def_vyres, long, 0664);
1918 module_param_named(rotate, def_rotate, uint, 0664);
1919 module_param_named(mirror, def_mirror, uint, 0664);
1920 module_param_named(manual_update, manual_update, bool, 0664);
1921
1922 module_init(omapfb_init);
1923 module_exit(omapfb_cleanup);
1924
1925 MODULE_DESCRIPTION("TI OMAP framebuffer driver");
1926 MODULE_AUTHOR("Imre Deak <imre.deak@nokia.com>");
1927 MODULE_LICENSE("GPL");
Linux with added FPC-III support