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dm writecache: correct uncommitted_block when discarding uncommitted entry
[linux/fpc-iii.git] / drivers / video / fbdev / omap / omapfb_main.c
blobe8a304f84ea848783a5a2628af7bee0d660d0e84
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 #ifdef CONFIG_FB_OMAP_MANUAL_UPDATE
38 static bool manual_update = 1;
39 #else
40 static bool manual_update;
41 #endif
42
43 static struct platform_device *fbdev_pdev;
44 static struct lcd_panel *fbdev_panel;
45 static struct omapfb_device *omapfb_dev;
46
47 struct caps_table_struct {
48 unsigned long flag;
49 const char *name;
50 };
51
52 static const struct caps_table_struct ctrl_caps[] = {
53 { OMAPFB_CAPS_MANUAL_UPDATE, "manual update" },
54 { OMAPFB_CAPS_TEARSYNC, "tearing synchronization" },
55 { OMAPFB_CAPS_PLANE_RELOCATE_MEM, "relocate plane memory" },
56 { OMAPFB_CAPS_PLANE_SCALE, "scale plane" },
57 { OMAPFB_CAPS_WINDOW_PIXEL_DOUBLE, "pixel double window" },
58 { OMAPFB_CAPS_WINDOW_SCALE, "scale window" },
59 { OMAPFB_CAPS_WINDOW_OVERLAY, "overlay window" },
60 { OMAPFB_CAPS_WINDOW_ROTATE, "rotate window" },
61 { OMAPFB_CAPS_SET_BACKLIGHT, "backlight setting" },
62 };
63
64 static const struct caps_table_struct color_caps[] = {
65 { 1 << OMAPFB_COLOR_RGB565, "RGB565", },
66 { 1 << OMAPFB_COLOR_YUV422, "YUV422", },
67 { 1 << OMAPFB_COLOR_YUV420, "YUV420", },
68 { 1 << OMAPFB_COLOR_CLUT_8BPP, "CLUT8", },
69 { 1 << OMAPFB_COLOR_CLUT_4BPP, "CLUT4", },
70 { 1 << OMAPFB_COLOR_CLUT_2BPP, "CLUT2", },
71 { 1 << OMAPFB_COLOR_CLUT_1BPP, "CLUT1", },
72 { 1 << OMAPFB_COLOR_RGB444, "RGB444", },
73 { 1 << OMAPFB_COLOR_YUY422, "YUY422", },
74 };
75
76 static void omapdss_release(struct device *dev)
77 {
78 }
79
80 /* dummy device for clocks */
81 static struct platform_device omapdss_device = {
82 .name = "omapdss_dss",
83 .id = -1,
84 .dev = {
85 .release = omapdss_release,
86 },
87 };
88
89 /*
90 * ---------------------------------------------------------------------------
91 * LCD panel
92 * ---------------------------------------------------------------------------
93 */
94 extern struct lcd_ctrl hwa742_ctrl;
95
96 static const struct lcd_ctrl *ctrls[] = {
97 &omap1_int_ctrl,
98
99 #ifdef CONFIG_FB_OMAP_LCDC_HWA742
100 &hwa742_ctrl,
101 #endif
102 };
103
104 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
105 extern struct lcd_ctrl_extif omap1_ext_if;
106 #endif
107
108 static void omapfb_rqueue_lock(struct omapfb_device *fbdev)
109 {
110 mutex_lock(&fbdev->rqueue_mutex);
111 }
112
113 static void omapfb_rqueue_unlock(struct omapfb_device *fbdev)
114 {
115 mutex_unlock(&fbdev->rqueue_mutex);
116 }
117
118 /*
119 * ---------------------------------------------------------------------------
120 * LCD controller and LCD DMA
121 * ---------------------------------------------------------------------------
122 */
123 /*
124 * Allocate resources needed for LCD controller and LCD DMA operations. Video
125 * memory is allocated from system memory according to the virtual display
126 * size, except if a bigger memory size is specified explicitly as a kernel
127 * parameter.
128 */
129 static int ctrl_init(struct omapfb_device *fbdev)
130 {
131 int r;
132 int i;
133
134 /* kernel/module vram parameters override boot tags/board config */
135 if (def_vram_cnt) {
136 for (i = 0; i < def_vram_cnt; i++)
137 fbdev->mem_desc.region[i].size =
138 PAGE_ALIGN(def_vram[i]);
139 fbdev->mem_desc.region_cnt = i;
140 }
141
142 if (!fbdev->mem_desc.region_cnt) {
143 struct lcd_panel *panel = fbdev->panel;
144 int def_size;
145 int bpp = panel->bpp;
146
147 /* 12 bpp is packed in 16 bits */
148 if (bpp == 12)
149 bpp = 16;
150 def_size = def_vxres * def_vyres * bpp / 8;
151 fbdev->mem_desc.region_cnt = 1;
152 fbdev->mem_desc.region[0].size = PAGE_ALIGN(def_size);
153 }
154 r = fbdev->ctrl->init(fbdev, 0, &fbdev->mem_desc);
155 if (r < 0) {
156 dev_err(fbdev->dev, "controller initialization failed (%d)\n",
157 r);
158 return r;
159 }
160
161 #ifdef DEBUG
162 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
163 dev_dbg(fbdev->dev, "region%d phys %08x virt %p size=%lu\n",
164 i,
165 fbdev->mem_desc.region[i].paddr,
166 fbdev->mem_desc.region[i].vaddr,
167 fbdev->mem_desc.region[i].size);
168 }
169 #endif
170 return 0;
171 }
172
173 static void ctrl_cleanup(struct omapfb_device *fbdev)
174 {
175 fbdev->ctrl->cleanup();
176 }
177
178 /* Must be called with fbdev->rqueue_mutex held. */
179 static int ctrl_change_mode(struct fb_info *fbi)
180 {
181 int r;
182 unsigned long offset;
183 struct omapfb_plane_struct *plane = fbi->par;
184 struct omapfb_device *fbdev = plane->fbdev;
185 struct fb_var_screeninfo *var = &fbi->var;
186
187 offset = var->yoffset * fbi->fix.line_length +
188 var->xoffset * var->bits_per_pixel / 8;
189
190 if (fbdev->ctrl->sync)
191 fbdev->ctrl->sync();
192 r = fbdev->ctrl->setup_plane(plane->idx, plane->info.channel_out,
193 offset, var->xres_virtual,
194 plane->info.pos_x, plane->info.pos_y,
195 var->xres, var->yres, plane->color_mode);
196 if (r < 0)
197 return r;
198
199 if (fbdev->ctrl->set_rotate != NULL) {
200 r = fbdev->ctrl->set_rotate(var->rotate);
201 if (r < 0)
202 return r;
203 }
204
205 if (fbdev->ctrl->set_scale != NULL)
206 r = fbdev->ctrl->set_scale(plane->idx,
207 var->xres, var->yres,
208 plane->info.out_width,
209 plane->info.out_height);
210
211 return r;
212 }
213
214 /*
215 * ---------------------------------------------------------------------------
216 * fbdev framework callbacks and the ioctl interface
217 * ---------------------------------------------------------------------------
218 */
219 /* Called each time the omapfb device is opened */
220 static int omapfb_open(struct fb_info *info, int user)
221 {
222 return 0;
223 }
224
225 static void omapfb_sync(struct fb_info *info);
226
227 /* Called when the omapfb device is closed. We make sure that any pending
228 * gfx DMA operations are ended, before we return. */
229 static int omapfb_release(struct fb_info *info, int user)
230 {
231 omapfb_sync(info);
232 return 0;
233 }
234
235 /* Store a single color palette entry into a pseudo palette or the hardware
236 * palette if one is available. For now we support only 16bpp and thus store
237 * the entry only to the pseudo palette.
238 */
239 static int _setcolreg(struct fb_info *info, u_int regno, u_int red, u_int green,
240 u_int blue, u_int transp, int update_hw_pal)
241 {
242 struct omapfb_plane_struct *plane = info->par;
243 struct omapfb_device *fbdev = plane->fbdev;
244 struct fb_var_screeninfo *var = &info->var;
245 int r = 0;
246
247 switch (plane->color_mode) {
248 case OMAPFB_COLOR_YUV422:
249 case OMAPFB_COLOR_YUV420:
250 case OMAPFB_COLOR_YUY422:
251 r = -EINVAL;
252 break;
253 case OMAPFB_COLOR_CLUT_8BPP:
254 case OMAPFB_COLOR_CLUT_4BPP:
255 case OMAPFB_COLOR_CLUT_2BPP:
256 case OMAPFB_COLOR_CLUT_1BPP:
257 if (fbdev->ctrl->setcolreg)
258 r = fbdev->ctrl->setcolreg(regno, red, green, blue,
259 transp, update_hw_pal);
260 /* Fallthrough */
261 case OMAPFB_COLOR_RGB565:
262 case OMAPFB_COLOR_RGB444:
263 if (r != 0)
264 break;
265
266 if (regno < 16) {
267 u16 pal;
268 pal = ((red >> (16 - var->red.length)) <<
269 var->red.offset) |
270 ((green >> (16 - var->green.length)) <<
271 var->green.offset) |
272 (blue >> (16 - var->blue.length));
273 ((u32 *)(info->pseudo_palette))[regno] = pal;
274 }
275 break;
276 default:
277 BUG();
278 }
279 return r;
280 }
281
282 static int omapfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
283 u_int transp, struct fb_info *info)
284 {
285 return _setcolreg(info, regno, red, green, blue, transp, 1);
286 }
287
288 static int omapfb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
289 {
290 int count, index, r;
291 u16 *red, *green, *blue, *transp;
292 u16 trans = 0xffff;
293
294 red = cmap->red;
295 green = cmap->green;
296 blue = cmap->blue;
297 transp = cmap->transp;
298 index = cmap->start;
299
300 for (count = 0; count < cmap->len; count++) {
301 if (transp)
302 trans = *transp++;
303 r = _setcolreg(info, index++, *red++, *green++, *blue++, trans,
304 count == cmap->len - 1);
305 if (r != 0)
306 return r;
307 }
308
309 return 0;
310 }
311
312 static int omapfb_update_full_screen(struct fb_info *fbi);
313
314 static int omapfb_blank(int blank, struct fb_info *fbi)
315 {
316 struct omapfb_plane_struct *plane = fbi->par;
317 struct omapfb_device *fbdev = plane->fbdev;
318 int do_update = 0;
319 int r = 0;
320
321 omapfb_rqueue_lock(fbdev);
322 switch (blank) {
323 case FB_BLANK_UNBLANK:
324 if (fbdev->state == OMAPFB_SUSPENDED) {
325 if (fbdev->ctrl->resume)
326 fbdev->ctrl->resume();
327 if (fbdev->panel->enable)
328 fbdev->panel->enable(fbdev->panel);
329 fbdev->state = OMAPFB_ACTIVE;
330 if (fbdev->ctrl->get_update_mode() ==
331 OMAPFB_MANUAL_UPDATE)
332 do_update = 1;
333 }
334 break;
335 case FB_BLANK_POWERDOWN:
336 if (fbdev->state == OMAPFB_ACTIVE) {
337 if (fbdev->panel->disable)
338 fbdev->panel->disable(fbdev->panel);
339 if (fbdev->ctrl->suspend)
340 fbdev->ctrl->suspend();
341 fbdev->state = OMAPFB_SUSPENDED;
342 }
343 break;
344 default:
345 r = -EINVAL;
346 }
347 omapfb_rqueue_unlock(fbdev);
348
349 if (r == 0 && do_update)
350 r = omapfb_update_full_screen(fbi);
351
352 return r;
353 }
354
355 static void omapfb_sync(struct fb_info *fbi)
356 {
357 struct omapfb_plane_struct *plane = fbi->par;
358 struct omapfb_device *fbdev = plane->fbdev;
359
360 omapfb_rqueue_lock(fbdev);
361 if (fbdev->ctrl->sync)
362 fbdev->ctrl->sync();
363 omapfb_rqueue_unlock(fbdev);
364 }
365
366 /*
367 * Set fb_info.fix fields and also updates fbdev.
368 * When calling this fb_info.var must be set up already.
369 */
370 static void set_fb_fix(struct fb_info *fbi, int from_init)
371 {
372 struct fb_fix_screeninfo *fix = &fbi->fix;
373 struct fb_var_screeninfo *var = &fbi->var;
374 struct omapfb_plane_struct *plane = fbi->par;
375 struct omapfb_mem_region *rg;
376 int bpp;
377
378 rg = &plane->fbdev->mem_desc.region[plane->idx];
379 fbi->screen_base = rg->vaddr;
380
381 if (!from_init) {
382 mutex_lock(&fbi->mm_lock);
383 fix->smem_start = rg->paddr;
384 fix->smem_len = rg->size;
385 mutex_unlock(&fbi->mm_lock);
386 } else {
387 fix->smem_start = rg->paddr;
388 fix->smem_len = rg->size;
389 }
390
391 fix->type = FB_TYPE_PACKED_PIXELS;
392 bpp = var->bits_per_pixel;
393 if (var->nonstd)
394 fix->visual = FB_VISUAL_PSEUDOCOLOR;
395 else switch (var->bits_per_pixel) {
396 case 16:
397 case 12:
398 fix->visual = FB_VISUAL_TRUECOLOR;
399 /* 12bpp is stored in 16 bits */
400 bpp = 16;
401 break;
402 case 1:
403 case 2:
404 case 4:
405 case 8:
406 fix->visual = FB_VISUAL_PSEUDOCOLOR;
407 break;
408 }
409 fix->accel = FB_ACCEL_OMAP1610;
410 fix->line_length = var->xres_virtual * bpp / 8;
411 }
412
413 static int set_color_mode(struct omapfb_plane_struct *plane,
414 struct fb_var_screeninfo *var)
415 {
416 switch (var->nonstd) {
417 case 0:
418 break;
419 case OMAPFB_COLOR_YUV422:
420 var->bits_per_pixel = 16;
421 plane->color_mode = var->nonstd;
422 return 0;
423 case OMAPFB_COLOR_YUV420:
424 var->bits_per_pixel = 12;
425 plane->color_mode = var->nonstd;
426 return 0;
427 case OMAPFB_COLOR_YUY422:
428 var->bits_per_pixel = 16;
429 plane->color_mode = var->nonstd;
430 return 0;
431 default:
432 return -EINVAL;
433 }
434
435 switch (var->bits_per_pixel) {
436 case 1:
437 plane->color_mode = OMAPFB_COLOR_CLUT_1BPP;
438 return 0;
439 case 2:
440 plane->color_mode = OMAPFB_COLOR_CLUT_2BPP;
441 return 0;
442 case 4:
443 plane->color_mode = OMAPFB_COLOR_CLUT_4BPP;
444 return 0;
445 case 8:
446 plane->color_mode = OMAPFB_COLOR_CLUT_8BPP;
447 return 0;
448 case 12:
449 var->bits_per_pixel = 16;
450 /* fall through */
451 case 16:
452 if (plane->fbdev->panel->bpp == 12)
453 plane->color_mode = OMAPFB_COLOR_RGB444;
454 else
455 plane->color_mode = OMAPFB_COLOR_RGB565;
456 return 0;
457 default:
458 return -EINVAL;
459 }
460 }
461
462 /*
463 * Check the values in var against our capabilities and in case of out of
464 * bound values try to adjust them.
465 */
466 static int set_fb_var(struct fb_info *fbi,
467 struct fb_var_screeninfo *var)
468 {
469 int bpp;
470 unsigned long max_frame_size;
471 unsigned long line_size;
472 int xres_min, xres_max;
473 int yres_min, yres_max;
474 struct omapfb_plane_struct *plane = fbi->par;
475 struct omapfb_device *fbdev = plane->fbdev;
476 struct lcd_panel *panel = fbdev->panel;
477
478 if (set_color_mode(plane, var) < 0)
479 return -EINVAL;
480
481 bpp = var->bits_per_pixel;
482 if (plane->color_mode == OMAPFB_COLOR_RGB444)
483 bpp = 16;
484
485 switch (var->rotate) {
486 case 0:
487 case 180:
488 xres_min = OMAPFB_PLANE_XRES_MIN;
489 xres_max = panel->x_res;
490 yres_min = OMAPFB_PLANE_YRES_MIN;
491 yres_max = panel->y_res;
492 if (cpu_is_omap15xx()) {
493 var->xres = panel->x_res;
494 var->yres = panel->y_res;
495 }
496 break;
497 case 90:
498 case 270:
499 xres_min = OMAPFB_PLANE_YRES_MIN;
500 xres_max = panel->y_res;
501 yres_min = OMAPFB_PLANE_XRES_MIN;
502 yres_max = panel->x_res;
503 if (cpu_is_omap15xx()) {
504 var->xres = panel->y_res;
505 var->yres = panel->x_res;
506 }
507 break;
508 default:
509 return -EINVAL;
510 }
511
512 if (var->xres < xres_min)
513 var->xres = xres_min;
514 if (var->yres < yres_min)
515 var->yres = yres_min;
516 if (var->xres > xres_max)
517 var->xres = xres_max;
518 if (var->yres > yres_max)
519 var->yres = yres_max;
520
521 if (var->xres_virtual < var->xres)
522 var->xres_virtual = var->xres;
523 if (var->yres_virtual < var->yres)
524 var->yres_virtual = var->yres;
525 max_frame_size = fbdev->mem_desc.region[plane->idx].size;
526 line_size = var->xres_virtual * bpp / 8;
527 if (line_size * var->yres_virtual > max_frame_size) {
528 /* Try to keep yres_virtual first */
529 line_size = max_frame_size / var->yres_virtual;
530 var->xres_virtual = line_size * 8 / bpp;
531 if (var->xres_virtual < var->xres) {
532 /* Still doesn't fit. Shrink yres_virtual too */
533 var->xres_virtual = var->xres;
534 line_size = var->xres * bpp / 8;
535 var->yres_virtual = max_frame_size / line_size;
536 }
537 /* Recheck this, as the virtual size changed. */
538 if (var->xres_virtual < var->xres)
539 var->xres = var->xres_virtual;
540 if (var->yres_virtual < var->yres)
541 var->yres = var->yres_virtual;
542 if (var->xres < xres_min || var->yres < yres_min)
543 return -EINVAL;
544 }
545 if (var->xres + var->xoffset > var->xres_virtual)
546 var->xoffset = var->xres_virtual - var->xres;
547 if (var->yres + var->yoffset > var->yres_virtual)
548 var->yoffset = var->yres_virtual - var->yres;
549
550 if (plane->color_mode == OMAPFB_COLOR_RGB444) {
551 var->red.offset = 8; var->red.length = 4;
552 var->red.msb_right = 0;
553 var->green.offset = 4; var->green.length = 4;
554 var->green.msb_right = 0;
555 var->blue.offset = 0; var->blue.length = 4;
556 var->blue.msb_right = 0;
557 } else {
558 var->red.offset = 11; var->red.length = 5;
559 var->red.msb_right = 0;
560 var->green.offset = 5; var->green.length = 6;
561 var->green.msb_right = 0;
562 var->blue.offset = 0; var->blue.length = 5;
563 var->blue.msb_right = 0;
564 }
565
566 var->height = -1;
567 var->width = -1;
568 var->grayscale = 0;
569
570 /* pixclock in ps, the rest in pixclock */
571 var->pixclock = 10000000 / (panel->pixel_clock / 100);
572 var->left_margin = panel->hfp;
573 var->right_margin = panel->hbp;
574 var->upper_margin = panel->vfp;
575 var->lower_margin = panel->vbp;
576 var->hsync_len = panel->hsw;
577 var->vsync_len = panel->vsw;
578
579 /* TODO: get these from panel->config */
580 var->vmode = FB_VMODE_NONINTERLACED;
581 var->sync = 0;
582
583 return 0;
584 }
585
586
587 /*
588 * Set new x,y offsets in the virtual display for the visible area and switch
589 * to the new mode.
590 */
591 static int omapfb_pan_display(struct fb_var_screeninfo *var,
592 struct fb_info *fbi)
593 {
594 struct omapfb_plane_struct *plane = fbi->par;
595 struct omapfb_device *fbdev = plane->fbdev;
596 int r = 0;
597
598 omapfb_rqueue_lock(fbdev);
599 if (var->xoffset != fbi->var.xoffset ||
600 var->yoffset != fbi->var.yoffset) {
601 struct fb_var_screeninfo *new_var = &fbdev->new_var;
602
603 memcpy(new_var, &fbi->var, sizeof(*new_var));
604 new_var->xoffset = var->xoffset;
605 new_var->yoffset = var->yoffset;
606 if (set_fb_var(fbi, new_var))
607 r = -EINVAL;
608 else {
609 memcpy(&fbi->var, new_var, sizeof(*new_var));
610 ctrl_change_mode(fbi);
611 }
612 }
613 omapfb_rqueue_unlock(fbdev);
614
615 return r;
616 }
617
618 /* Set mirror to vertical axis and switch to the new mode. */
619 static int omapfb_mirror(struct fb_info *fbi, int mirror)
620 {
621 struct omapfb_plane_struct *plane = fbi->par;
622 struct omapfb_device *fbdev = plane->fbdev;
623 int r = 0;
624
625 omapfb_rqueue_lock(fbdev);
626 mirror = mirror ? 1 : 0;
627 if (cpu_is_omap15xx())
628 r = -EINVAL;
629 else if (mirror != plane->info.mirror) {
630 plane->info.mirror = mirror;
631 r = ctrl_change_mode(fbi);
632 }
633 omapfb_rqueue_unlock(fbdev);
634
635 return r;
636 }
637
638 /*
639 * Check values in var, try to adjust them in case of out of bound values if
640 * possible, or return error.
641 */
642 static int omapfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
643 {
644 struct omapfb_plane_struct *plane = fbi->par;
645 struct omapfb_device *fbdev = plane->fbdev;
646 int r;
647
648 omapfb_rqueue_lock(fbdev);
649 if (fbdev->ctrl->sync != NULL)
650 fbdev->ctrl->sync();
651 r = set_fb_var(fbi, var);
652 omapfb_rqueue_unlock(fbdev);
653
654 return r;
655 }
656
657 /*
658 * Switch to a new mode. The parameters for it has been check already by
659 * omapfb_check_var.
660 */
661 static int omapfb_set_par(struct fb_info *fbi)
662 {
663 struct omapfb_plane_struct *plane = fbi->par;
664 struct omapfb_device *fbdev = plane->fbdev;
665 int r = 0;
666
667 omapfb_rqueue_lock(fbdev);
668 set_fb_fix(fbi, 0);
669 r = ctrl_change_mode(fbi);
670 omapfb_rqueue_unlock(fbdev);
671
672 return r;
673 }
674
675 int omapfb_update_window_async(struct fb_info *fbi,
676 struct omapfb_update_window *win,
677 void (*callback)(void *),
678 void *callback_data)
679 {
680 int xres, yres;
681 struct omapfb_plane_struct *plane = fbi->par;
682 struct omapfb_device *fbdev = plane->fbdev;
683 struct fb_var_screeninfo *var = &fbi->var;
684
685 switch (var->rotate) {
686 case 0:
687 case 180:
688 xres = fbdev->panel->x_res;
689 yres = fbdev->panel->y_res;
690 break;
691 case 90:
692 case 270:
693 xres = fbdev->panel->y_res;
694 yres = fbdev->panel->x_res;
695 break;
696 default:
697 return -EINVAL;
698 }
699
700 if (win->x >= xres || win->y >= yres ||
701 win->out_x > xres || win->out_y > yres)
702 return -EINVAL;
703
704 if (!fbdev->ctrl->update_window ||
705 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
706 return -ENODEV;
707
708 if (win->x + win->width > xres)
709 win->width = xres - win->x;
710 if (win->y + win->height > yres)
711 win->height = yres - win->y;
712 if (win->out_x + win->out_width > xres)
713 win->out_width = xres - win->out_x;
714 if (win->out_y + win->out_height > yres)
715 win->out_height = yres - win->out_y;
716 if (!win->width || !win->height || !win->out_width || !win->out_height)
717 return 0;
718
719 return fbdev->ctrl->update_window(fbi, win, callback, callback_data);
720 }
721 EXPORT_SYMBOL(omapfb_update_window_async);
722
723 static int omapfb_update_win(struct fb_info *fbi,
724 struct omapfb_update_window *win)
725 {
726 struct omapfb_plane_struct *plane = fbi->par;
727 int ret;
728
729 omapfb_rqueue_lock(plane->fbdev);
730 ret = omapfb_update_window_async(fbi, win, NULL, NULL);
731 omapfb_rqueue_unlock(plane->fbdev);
732
733 return ret;
734 }
735
736 static int omapfb_update_full_screen(struct fb_info *fbi)
737 {
738 struct omapfb_plane_struct *plane = fbi->par;
739 struct omapfb_device *fbdev = plane->fbdev;
740 struct omapfb_update_window win;
741 int r;
742
743 if (!fbdev->ctrl->update_window ||
744 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
745 return -ENODEV;
746
747 win.x = 0;
748 win.y = 0;
749 win.width = fbi->var.xres;
750 win.height = fbi->var.yres;
751 win.out_x = 0;
752 win.out_y = 0;
753 win.out_width = fbi->var.xres;
754 win.out_height = fbi->var.yres;
755 win.format = 0;
756
757 omapfb_rqueue_lock(fbdev);
758 r = fbdev->ctrl->update_window(fbi, &win, NULL, NULL);
759 omapfb_rqueue_unlock(fbdev);
760
761 return r;
762 }
763
764 static int omapfb_setup_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
765 {
766 struct omapfb_plane_struct *plane = fbi->par;
767 struct omapfb_device *fbdev = plane->fbdev;
768 struct lcd_panel *panel = fbdev->panel;
769 struct omapfb_plane_info old_info;
770 int r = 0;
771
772 if (pi->pos_x + pi->out_width > panel->x_res ||
773 pi->pos_y + pi->out_height > panel->y_res)
774 return -EINVAL;
775
776 omapfb_rqueue_lock(fbdev);
777 if (pi->enabled && !fbdev->mem_desc.region[plane->idx].size) {
778 /*
779 * This plane's memory was freed, can't enable it
780 * until it's reallocated.
781 */
782 r = -EINVAL;
783 goto out;
784 }
785 old_info = plane->info;
786 plane->info = *pi;
787 if (pi->enabled) {
788 r = ctrl_change_mode(fbi);
789 if (r < 0) {
790 plane->info = old_info;
791 goto out;
792 }
793 }
794 r = fbdev->ctrl->enable_plane(plane->idx, pi->enabled);
795 if (r < 0) {
796 plane->info = old_info;
797 goto out;
798 }
799 out:
800 omapfb_rqueue_unlock(fbdev);
801 return r;
802 }
803
804 static int omapfb_query_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
805 {
806 struct omapfb_plane_struct *plane = fbi->par;
807
808 *pi = plane->info;
809 return 0;
810 }
811
812 static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
813 {
814 struct omapfb_plane_struct *plane = fbi->par;
815 struct omapfb_device *fbdev = plane->fbdev;
816 struct omapfb_mem_region *rg = &fbdev->mem_desc.region[plane->idx];
817 size_t size;
818 int r = 0;
819
820 if (fbdev->ctrl->setup_mem == NULL)
821 return -ENODEV;
822 if (mi->type != OMAPFB_MEMTYPE_SDRAM)
823 return -EINVAL;
824
825 size = PAGE_ALIGN(mi->size);
826 omapfb_rqueue_lock(fbdev);
827 if (plane->info.enabled) {
828 r = -EBUSY;
829 goto out;
830 }
831 if (rg->size != size || rg->type != mi->type) {
832 struct fb_var_screeninfo *new_var = &fbdev->new_var;
833 unsigned long old_size = rg->size;
834 u8 old_type = rg->type;
835 unsigned long paddr;
836
837 rg->size = size;
838 rg->type = mi->type;
839 /*
840 * size == 0 is a special case, for which we
841 * don't check / adjust the screen parameters.
842 * This isn't a problem since the plane can't
843 * be reenabled unless its size is > 0.
844 */
845 if (old_size != size && size) {
846 if (size) {
847 memcpy(new_var, &fbi->var, sizeof(*new_var));
848 r = set_fb_var(fbi, new_var);
849 if (r < 0)
850 goto out;
851 }
852 }
853
854 if (fbdev->ctrl->sync)
855 fbdev->ctrl->sync();
856 r = fbdev->ctrl->setup_mem(plane->idx, size, mi->type, &paddr);
857 if (r < 0) {
858 /* Revert changes. */
859 rg->size = old_size;
860 rg->type = old_type;
861 goto out;
862 }
863 rg->paddr = paddr;
864
865 if (old_size != size) {
866 if (size) {
867 memcpy(&fbi->var, new_var, sizeof(fbi->var));
868 set_fb_fix(fbi, 0);
869 } else {
870 /*
871 * Set these explicitly to indicate that the
872 * plane memory is dealloce'd, the other
873 * screen parameters in var / fix are invalid.
874 */
875 mutex_lock(&fbi->mm_lock);
876 fbi->fix.smem_start = 0;
877 fbi->fix.smem_len = 0;
878 mutex_unlock(&fbi->mm_lock);
879 }
880 }
881 }
882 out:
883 omapfb_rqueue_unlock(fbdev);
884
885 return r;
886 }
887
888 static int omapfb_query_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
889 {
890 struct omapfb_plane_struct *plane = fbi->par;
891 struct omapfb_device *fbdev = plane->fbdev;
892 struct omapfb_mem_region *rg;
893
894 rg = &fbdev->mem_desc.region[plane->idx];
895 memset(mi, 0, sizeof(*mi));
896 mi->size = rg->size;
897 mi->type = rg->type;
898
899 return 0;
900 }
901
902 static int omapfb_set_color_key(struct omapfb_device *fbdev,
903 struct omapfb_color_key *ck)
904 {
905 int r;
906
907 if (!fbdev->ctrl->set_color_key)
908 return -ENODEV;
909
910 omapfb_rqueue_lock(fbdev);
911 r = fbdev->ctrl->set_color_key(ck);
912 omapfb_rqueue_unlock(fbdev);
913
914 return r;
915 }
916
917 static int omapfb_get_color_key(struct omapfb_device *fbdev,
918 struct omapfb_color_key *ck)
919 {
920 int r;
921
922 if (!fbdev->ctrl->get_color_key)
923 return -ENODEV;
924
925 omapfb_rqueue_lock(fbdev);
926 r = fbdev->ctrl->get_color_key(ck);
927 omapfb_rqueue_unlock(fbdev);
928
929 return r;
930 }
931
932 static struct blocking_notifier_head omapfb_client_list[OMAPFB_PLANE_NUM];
933 static int notifier_inited;
934
935 static void omapfb_init_notifier(void)
936 {
937 int i;
938
939 for (i = 0; i < OMAPFB_PLANE_NUM; i++)
940 BLOCKING_INIT_NOTIFIER_HEAD(&omapfb_client_list[i]);
941 }
942
943 int omapfb_register_client(struct omapfb_notifier_block *omapfb_nb,
944 omapfb_notifier_callback_t callback,
945 void *callback_data)
946 {
947 int r;
948
949 if ((unsigned)omapfb_nb->plane_idx >= OMAPFB_PLANE_NUM)
950 return -EINVAL;
951
952 if (!notifier_inited) {
953 omapfb_init_notifier();
954 notifier_inited = 1;
955 }
956
957 omapfb_nb->nb.notifier_call = (int (*)(struct notifier_block *,
958 unsigned long, void *))callback;
959 omapfb_nb->data = callback_data;
960 r = blocking_notifier_chain_register(
961 &omapfb_client_list[omapfb_nb->plane_idx],
962 &omapfb_nb->nb);
963 if (r)
964 return r;
965 if (omapfb_dev != NULL &&
966 omapfb_dev->ctrl && omapfb_dev->ctrl->bind_client) {
967 omapfb_dev->ctrl->bind_client(omapfb_nb);
968 }
969
970 return 0;
971 }
972 EXPORT_SYMBOL(omapfb_register_client);
973
974 int omapfb_unregister_client(struct omapfb_notifier_block *omapfb_nb)
975 {
976 return blocking_notifier_chain_unregister(
977 &omapfb_client_list[omapfb_nb->plane_idx], &omapfb_nb->nb);
978 }
979 EXPORT_SYMBOL(omapfb_unregister_client);
980
981 void omapfb_notify_clients(struct omapfb_device *fbdev, unsigned long event)
982 {
983 int i;
984
985 if (!notifier_inited)
986 /* no client registered yet */
987 return;
988
989 for (i = 0; i < OMAPFB_PLANE_NUM; i++)
990 blocking_notifier_call_chain(&omapfb_client_list[i], event,
991 fbdev->fb_info[i]);
992 }
993 EXPORT_SYMBOL(omapfb_notify_clients);
994
995 static int omapfb_set_update_mode(struct omapfb_device *fbdev,
996 enum omapfb_update_mode mode)
997 {
998 int r;
999
1000 omapfb_rqueue_lock(fbdev);
1001 r = fbdev->ctrl->set_update_mode(mode);
1002 omapfb_rqueue_unlock(fbdev);
1003
1004 return r;
1005 }
1006
1007 static enum omapfb_update_mode omapfb_get_update_mode(struct omapfb_device *fbdev)
1008 {
1009 int r;
1010
1011 omapfb_rqueue_lock(fbdev);
1012 r = fbdev->ctrl->get_update_mode();
1013 omapfb_rqueue_unlock(fbdev);
1014
1015 return r;
1016 }
1017
1018 static void omapfb_get_caps(struct omapfb_device *fbdev, int plane,
1019 struct omapfb_caps *caps)
1020 {
1021 memset(caps, 0, sizeof(*caps));
1022 fbdev->ctrl->get_caps(plane, caps);
1023 if (fbdev->panel->get_caps)
1024 caps->ctrl |= fbdev->panel->get_caps(fbdev->panel);
1025 }
1026
1027 /* For lcd testing */
1028 void omapfb_write_first_pixel(struct omapfb_device *fbdev, u16 pixval)
1029 {
1030 omapfb_rqueue_lock(fbdev);
1031 *(u16 *)fbdev->mem_desc.region[0].vaddr = pixval;
1032 if (fbdev->ctrl->get_update_mode() == OMAPFB_MANUAL_UPDATE) {
1033 struct omapfb_update_window win;
1034
1035 memset(&win, 0, sizeof(win));
1036 win.width = 2;
1037 win.height = 2;
1038 win.out_width = 2;
1039 win.out_height = 2;
1040 fbdev->ctrl->update_window(fbdev->fb_info[0], &win, NULL, NULL);
1041 }
1042 omapfb_rqueue_unlock(fbdev);
1043 }
1044 EXPORT_SYMBOL(omapfb_write_first_pixel);
1045
1046 /*
1047 * Ioctl interface. Part of the kernel mode frame buffer API is duplicated
1048 * here to be accessible by user mode code.
1049 */
1050 static int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd,
1051 unsigned long arg)
1052 {
1053 struct omapfb_plane_struct *plane = fbi->par;
1054 struct omapfb_device *fbdev = plane->fbdev;
1055 const struct fb_ops *ops = fbi->fbops;
1056 union {
1057 struct omapfb_update_window update_window;
1058 struct omapfb_plane_info plane_info;
1059 struct omapfb_mem_info mem_info;
1060 struct omapfb_color_key color_key;
1061 enum omapfb_update_mode update_mode;
1062 struct omapfb_caps caps;
1063 unsigned int mirror;
1064 int plane_out;
1065 int enable_plane;
1066 } p;
1067 int r = 0;
1068
1069 BUG_ON(!ops);
1070 switch (cmd) {
1071 case OMAPFB_MIRROR:
1072 if (get_user(p.mirror, (int __user *)arg))
1073 r = -EFAULT;
1074 else
1075 omapfb_mirror(fbi, p.mirror);
1076 break;
1077 case OMAPFB_SYNC_GFX:
1078 omapfb_sync(fbi);
1079 break;
1080 case OMAPFB_VSYNC:
1081 break;
1082 case OMAPFB_SET_UPDATE_MODE:
1083 if (get_user(p.update_mode, (int __user *)arg))
1084 r = -EFAULT;
1085 else
1086 r = omapfb_set_update_mode(fbdev, p.update_mode);
1087 break;
1088 case OMAPFB_GET_UPDATE_MODE:
1089 p.update_mode = omapfb_get_update_mode(fbdev);
1090 if (put_user(p.update_mode,
1091 (enum omapfb_update_mode __user *)arg))
1092 r = -EFAULT;
1093 break;
1094 case OMAPFB_UPDATE_WINDOW_OLD:
1095 if (copy_from_user(&p.update_window, (void __user *)arg,
1096 sizeof(struct omapfb_update_window_old)))
1097 r = -EFAULT;
1098 else {
1099 struct omapfb_update_window *u = &p.update_window;
1100 u->out_x = u->x;
1101 u->out_y = u->y;
1102 u->out_width = u->width;
1103 u->out_height = u->height;
1104 memset(u->reserved, 0, sizeof(u->reserved));
1105 r = omapfb_update_win(fbi, u);
1106 }
1107 break;
1108 case OMAPFB_UPDATE_WINDOW:
1109 if (copy_from_user(&p.update_window, (void __user *)arg,
1110 sizeof(p.update_window)))
1111 r = -EFAULT;
1112 else
1113 r = omapfb_update_win(fbi, &p.update_window);
1114 break;
1115 case OMAPFB_SETUP_PLANE:
1116 if (copy_from_user(&p.plane_info, (void __user *)arg,
1117 sizeof(p.plane_info)))
1118 r = -EFAULT;
1119 else
1120 r = omapfb_setup_plane(fbi, &p.plane_info);
1121 break;
1122 case OMAPFB_QUERY_PLANE:
1123 if ((r = omapfb_query_plane(fbi, &p.plane_info)) < 0)
1124 break;
1125 if (copy_to_user((void __user *)arg, &p.plane_info,
1126 sizeof(p.plane_info)))
1127 r = -EFAULT;
1128 break;
1129 case OMAPFB_SETUP_MEM:
1130 if (copy_from_user(&p.mem_info, (void __user *)arg,
1131 sizeof(p.mem_info)))
1132 r = -EFAULT;
1133 else
1134 r = omapfb_setup_mem(fbi, &p.mem_info);
1135 break;
1136 case OMAPFB_QUERY_MEM:
1137 if ((r = omapfb_query_mem(fbi, &p.mem_info)) < 0)
1138 break;
1139 if (copy_to_user((void __user *)arg, &p.mem_info,
1140 sizeof(p.mem_info)))
1141 r = -EFAULT;
1142 break;
1143 case OMAPFB_SET_COLOR_KEY:
1144 if (copy_from_user(&p.color_key, (void __user *)arg,
1145 sizeof(p.color_key)))
1146 r = -EFAULT;
1147 else
1148 r = omapfb_set_color_key(fbdev, &p.color_key);
1149 break;
1150 case OMAPFB_GET_COLOR_KEY:
1151 if ((r = omapfb_get_color_key(fbdev, &p.color_key)) < 0)
1152 break;
1153 if (copy_to_user((void __user *)arg, &p.color_key,
1154 sizeof(p.color_key)))
1155 r = -EFAULT;
1156 break;
1157 case OMAPFB_GET_CAPS:
1158 omapfb_get_caps(fbdev, plane->idx, &p.caps);
1159 if (copy_to_user((void __user *)arg, &p.caps, sizeof(p.caps)))
1160 r = -EFAULT;
1161 break;
1162 case OMAPFB_LCD_TEST:
1163 {
1164 int test_num;
1165
1166 if (get_user(test_num, (int __user *)arg)) {
1167 r = -EFAULT;
1168 break;
1169 }
1170 if (!fbdev->panel->run_test) {
1171 r = -EINVAL;
1172 break;
1173 }
1174 r = fbdev->panel->run_test(fbdev->panel, test_num);
1175 break;
1176 }
1177 case OMAPFB_CTRL_TEST:
1178 {
1179 int test_num;
1180
1181 if (get_user(test_num, (int __user *)arg)) {
1182 r = -EFAULT;
1183 break;
1184 }
1185 if (!fbdev->ctrl->run_test) {
1186 r = -EINVAL;
1187 break;
1188 }
1189 r = fbdev->ctrl->run_test(test_num);
1190 break;
1191 }
1192 default:
1193 r = -EINVAL;
1194 }
1195
1196 return r;
1197 }
1198
1199 static int omapfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
1200 {
1201 struct omapfb_plane_struct *plane = info->par;
1202 struct omapfb_device *fbdev = plane->fbdev;
1203 int r;
1204
1205 omapfb_rqueue_lock(fbdev);
1206 r = fbdev->ctrl->mmap(info, vma);
1207 omapfb_rqueue_unlock(fbdev);
1208
1209 return r;
1210 }
1211
1212 /*
1213 * Callback table for the frame buffer framework. Some of these pointers
1214 * will be changed according to the current setting of fb_info->accel_flags.
1215 */
1216 static struct fb_ops omapfb_ops = {
1217 .owner = THIS_MODULE,
1218 .fb_open = omapfb_open,
1219 .fb_release = omapfb_release,
1220 .fb_setcolreg = omapfb_setcolreg,
1221 .fb_setcmap = omapfb_setcmap,
1222 .fb_fillrect = cfb_fillrect,
1223 .fb_copyarea = cfb_copyarea,
1224 .fb_imageblit = cfb_imageblit,
1225 .fb_blank = omapfb_blank,
1226 .fb_ioctl = omapfb_ioctl,
1227 .fb_check_var = omapfb_check_var,
1228 .fb_set_par = omapfb_set_par,
1229 .fb_pan_display = omapfb_pan_display,
1230 };
1231
1232 /*
1233 * ---------------------------------------------------------------------------
1234 * Sysfs interface
1235 * ---------------------------------------------------------------------------
1236 */
1237 /* omapfbX sysfs entries */
1238 static ssize_t omapfb_show_caps_num(struct device *dev,
1239 struct device_attribute *attr, char *buf)
1240 {
1241 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1242 int plane;
1243 size_t size;
1244 struct omapfb_caps caps;
1245
1246 plane = 0;
1247 size = 0;
1248 while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1249 omapfb_get_caps(fbdev, plane, &caps);
1250 size += snprintf(&buf[size], PAGE_SIZE - size,
1251 "plane#%d %#010x %#010x %#010x\n",
1252 plane, caps.ctrl, caps.plane_color, caps.wnd_color);
1253 plane++;
1254 }
1255 return size;
1256 }
1257
1258 static ssize_t omapfb_show_caps_text(struct device *dev,
1259 struct device_attribute *attr, char *buf)
1260 {
1261 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1262 int i;
1263 struct omapfb_caps caps;
1264 int plane;
1265 size_t size;
1266
1267 plane = 0;
1268 size = 0;
1269 while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1270 omapfb_get_caps(fbdev, plane, &caps);
1271 size += snprintf(&buf[size], PAGE_SIZE - size,
1272 "plane#%d:\n", plane);
1273 for (i = 0; i < ARRAY_SIZE(ctrl_caps) &&
1274 size < PAGE_SIZE; i++) {
1275 if (ctrl_caps[i].flag & caps.ctrl)
1276 size += snprintf(&buf[size], PAGE_SIZE - size,
1277 " %s\n", ctrl_caps[i].name);
1278 }
1279 size += snprintf(&buf[size], PAGE_SIZE - size,
1280 " plane colors:\n");
1281 for (i = 0; i < ARRAY_SIZE(color_caps) &&
1282 size < PAGE_SIZE; i++) {
1283 if (color_caps[i].flag & caps.plane_color)
1284 size += snprintf(&buf[size], PAGE_SIZE - size,
1285 " %s\n", color_caps[i].name);
1286 }
1287 size += snprintf(&buf[size], PAGE_SIZE - size,
1288 " window colors:\n");
1289 for (i = 0; i < ARRAY_SIZE(color_caps) &&
1290 size < PAGE_SIZE; i++) {
1291 if (color_caps[i].flag & caps.wnd_color)
1292 size += snprintf(&buf[size], PAGE_SIZE - size,
1293 " %s\n", color_caps[i].name);
1294 }
1295
1296 plane++;
1297 }
1298 return size;
1299 }
1300
1301 static DEVICE_ATTR(caps_num, 0444, omapfb_show_caps_num, NULL);
1302 static DEVICE_ATTR(caps_text, 0444, omapfb_show_caps_text, NULL);
1303
1304 /* panel sysfs entries */
1305 static ssize_t omapfb_show_panel_name(struct device *dev,
1306 struct device_attribute *attr, char *buf)
1307 {
1308 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1309
1310 return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->panel->name);
1311 }
1312
1313 static ssize_t omapfb_show_bklight_level(struct device *dev,
1314 struct device_attribute *attr,
1315 char *buf)
1316 {
1317 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1318 int r;
1319
1320 if (fbdev->panel->get_bklight_level) {
1321 r = snprintf(buf, PAGE_SIZE, "%d\n",
1322 fbdev->panel->get_bklight_level(fbdev->panel));
1323 } else
1324 r = -ENODEV;
1325 return r;
1326 }
1327
1328 static ssize_t omapfb_store_bklight_level(struct device *dev,
1329 struct device_attribute *attr,
1330 const char *buf, size_t size)
1331 {
1332 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1333 int r;
1334
1335 if (fbdev->panel->set_bklight_level) {
1336 unsigned int level;
1337
1338 if (sscanf(buf, "%10d", &level) == 1) {
1339 r = fbdev->panel->set_bklight_level(fbdev->panel,
1340 level);
1341 } else
1342 r = -EINVAL;
1343 } else
1344 r = -ENODEV;
1345 return r ? r : size;
1346 }
1347
1348 static ssize_t omapfb_show_bklight_max(struct device *dev,
1349 struct device_attribute *attr, char *buf)
1350 {
1351 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1352 int r;
1353
1354 if (fbdev->panel->get_bklight_level) {
1355 r = snprintf(buf, PAGE_SIZE, "%d\n",
1356 fbdev->panel->get_bklight_max(fbdev->panel));
1357 } else
1358 r = -ENODEV;
1359 return r;
1360 }
1361
1362 static struct device_attribute dev_attr_panel_name =
1363 __ATTR(name, 0444, omapfb_show_panel_name, NULL);
1364 static DEVICE_ATTR(backlight_level, 0664,
1365 omapfb_show_bklight_level, omapfb_store_bklight_level);
1366 static DEVICE_ATTR(backlight_max, 0444, omapfb_show_bklight_max, NULL);
1367
1368 static struct attribute *panel_attrs[] = {
1369 &dev_attr_panel_name.attr,
1370 &dev_attr_backlight_level.attr,
1371 &dev_attr_backlight_max.attr,
1372 NULL,
1373 };
1374
1375 static const struct attribute_group panel_attr_grp = {
1376 .name = "panel",
1377 .attrs = panel_attrs,
1378 };
1379
1380 /* ctrl sysfs entries */
1381 static ssize_t omapfb_show_ctrl_name(struct device *dev,
1382 struct device_attribute *attr, char *buf)
1383 {
1384 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1385
1386 return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->ctrl->name);
1387 }
1388
1389 static struct device_attribute dev_attr_ctrl_name =
1390 __ATTR(name, 0444, omapfb_show_ctrl_name, NULL);
1391
1392 static struct attribute *ctrl_attrs[] = {
1393 &dev_attr_ctrl_name.attr,
1394 NULL,
1395 };
1396
1397 static const struct attribute_group ctrl_attr_grp = {
1398 .name = "ctrl",
1399 .attrs = ctrl_attrs,
1400 };
1401
1402 static int omapfb_register_sysfs(struct omapfb_device *fbdev)
1403 {
1404 int r;
1405
1406 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_num)))
1407 goto fail0;
1408
1409 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_text)))
1410 goto fail1;
1411
1412 if ((r = sysfs_create_group(&fbdev->dev->kobj, &panel_attr_grp)))
1413 goto fail2;
1414
1415 if ((r = sysfs_create_group(&fbdev->dev->kobj, &ctrl_attr_grp)))
1416 goto fail3;
1417
1418 return 0;
1419 fail3:
1420 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1421 fail2:
1422 device_remove_file(fbdev->dev, &dev_attr_caps_text);
1423 fail1:
1424 device_remove_file(fbdev->dev, &dev_attr_caps_num);
1425 fail0:
1426 dev_err(fbdev->dev, "unable to register sysfs interface\n");
1427 return r;
1428 }
1429
1430 static void omapfb_unregister_sysfs(struct omapfb_device *fbdev)
1431 {
1432 sysfs_remove_group(&fbdev->dev->kobj, &ctrl_attr_grp);
1433 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1434 device_remove_file(fbdev->dev, &dev_attr_caps_num);
1435 device_remove_file(fbdev->dev, &dev_attr_caps_text);
1436 }
1437
1438 /*
1439 * ---------------------------------------------------------------------------
1440 * LDM callbacks
1441 * ---------------------------------------------------------------------------
1442 */
1443 /* Initialize system fb_info object and set the default video mode.
1444 * The frame buffer memory already allocated by lcddma_init
1445 */
1446 static int fbinfo_init(struct omapfb_device *fbdev, struct fb_info *info)
1447 {
1448 struct fb_var_screeninfo *var = &info->var;
1449 struct fb_fix_screeninfo *fix = &info->fix;
1450 int r = 0;
1451
1452 info->fbops = &omapfb_ops;
1453 info->flags = FBINFO_FLAG_DEFAULT;
1454
1455 strncpy(fix->id, MODULE_NAME, sizeof(fix->id));
1456
1457 info->pseudo_palette = fbdev->pseudo_palette;
1458
1459 var->accel_flags = def_accel ? FB_ACCELF_TEXT : 0;
1460 var->xres = def_vxres;
1461 var->yres = def_vyres;
1462 var->xres_virtual = def_vxres;
1463 var->yres_virtual = def_vyres;
1464 var->rotate = def_rotate;
1465 var->bits_per_pixel = fbdev->panel->bpp;
1466
1467 set_fb_var(info, var);
1468 set_fb_fix(info, 1);
1469
1470 r = fb_alloc_cmap(&info->cmap, 16, 0);
1471 if (r != 0)
1472 dev_err(fbdev->dev, "unable to allocate color map memory\n");
1473
1474 return r;
1475 }
1476
1477 /* Release the fb_info object */
1478 static void fbinfo_cleanup(struct omapfb_device *fbdev, struct fb_info *fbi)
1479 {
1480 fb_dealloc_cmap(&fbi->cmap);
1481 }
1482
1483 static void planes_cleanup(struct omapfb_device *fbdev)
1484 {
1485 int i;
1486
1487 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1488 if (fbdev->fb_info[i] == NULL)
1489 break;
1490 fbinfo_cleanup(fbdev, fbdev->fb_info[i]);
1491 framebuffer_release(fbdev->fb_info[i]);
1492 }
1493 }
1494
1495 static int planes_init(struct omapfb_device *fbdev)
1496 {
1497 struct fb_info *fbi;
1498 int i;
1499 int r;
1500
1501 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1502 struct omapfb_plane_struct *plane;
1503 fbi = framebuffer_alloc(sizeof(struct omapfb_plane_struct),
1504 fbdev->dev);
1505 if (fbi == NULL) {
1506 planes_cleanup(fbdev);
1507 return -ENOMEM;
1508 }
1509 plane = fbi->par;
1510 plane->idx = i;
1511 plane->fbdev = fbdev;
1512 plane->info.mirror = def_mirror;
1513 fbdev->fb_info[i] = fbi;
1514
1515 if ((r = fbinfo_init(fbdev, fbi)) < 0) {
1516 framebuffer_release(fbi);
1517 planes_cleanup(fbdev);
1518 return r;
1519 }
1520 plane->info.out_width = fbi->var.xres;
1521 plane->info.out_height = fbi->var.yres;
1522 }
1523 return 0;
1524 }
1525
1526 /*
1527 * Free driver resources. Can be called to rollback an aborted initialization
1528 * sequence.
1529 */
1530 static void omapfb_free_resources(struct omapfb_device *fbdev, int state)
1531 {
1532 int i;
1533
1534 switch (state) {
1535 case OMAPFB_ACTIVE:
1536 for (i = 0; i < fbdev->mem_desc.region_cnt; i++)
1537 unregister_framebuffer(fbdev->fb_info[i]);
1538 /* fall through */
1539 case 7:
1540 omapfb_unregister_sysfs(fbdev);
1541 /* fall through */
1542 case 6:
1543 if (fbdev->panel->disable)
1544 fbdev->panel->disable(fbdev->panel);
1545 /* fall through */
1546 case 5:
1547 omapfb_set_update_mode(fbdev, OMAPFB_UPDATE_DISABLED);
1548 /* fall through */
1549 case 4:
1550 planes_cleanup(fbdev);
1551 /* fall through */
1552 case 3:
1553 ctrl_cleanup(fbdev);
1554 /* fall through */
1555 case 2:
1556 if (fbdev->panel->cleanup)
1557 fbdev->panel->cleanup(fbdev->panel);
1558 /* fall through */
1559 case 1:
1560 dev_set_drvdata(fbdev->dev, NULL);
1561 kfree(fbdev);
1562 case 0:
1563 /* nothing to free */
1564 break;
1565 default:
1566 BUG();
1567 }
1568 }
1569
1570 static int omapfb_find_ctrl(struct omapfb_device *fbdev)
1571 {
1572 struct omapfb_platform_data *conf;
1573 char name[17];
1574 int i;
1575
1576 conf = dev_get_platdata(fbdev->dev);
1577
1578 fbdev->ctrl = NULL;
1579
1580 strncpy(name, conf->lcd.ctrl_name, sizeof(name) - 1);
1581 name[sizeof(name) - 1] = '\0';
1582
1583 if (strcmp(name, "internal") == 0) {
1584 fbdev->ctrl = fbdev->int_ctrl;
1585 return 0;
1586 }
1587
1588 for (i = 0; i < ARRAY_SIZE(ctrls); i++) {
1589 dev_dbg(fbdev->dev, "ctrl %s\n", ctrls[i]->name);
1590 if (strcmp(ctrls[i]->name, name) == 0) {
1591 fbdev->ctrl = ctrls[i];
1592 break;
1593 }
1594 }
1595
1596 if (fbdev->ctrl == NULL) {
1597 dev_dbg(fbdev->dev, "ctrl %s not supported\n", name);
1598 return -1;
1599 }
1600
1601 return 0;
1602 }
1603
1604 /*
1605 * Called by LDM binding to probe and attach a new device.
1606 * Initialization sequence:
1607 * 1. allocate system omapfb_device structure
1608 * 2. select controller type according to platform configuration
1609 * init LCD panel
1610 * 3. init LCD controller and LCD DMA
1611 * 4. init system fb_info structure for all planes
1612 * 5. setup video mode for first plane and enable it
1613 * 6. enable LCD panel
1614 * 7. register sysfs attributes
1615 * OMAPFB_ACTIVE: register system fb_info structure for all planes
1616 */
1617 static int omapfb_do_probe(struct platform_device *pdev,
1618 struct lcd_panel *panel)
1619 {
1620 struct omapfb_device *fbdev = NULL;
1621 int init_state;
1622 unsigned long phz, hhz, vhz;
1623 unsigned long vram;
1624 int i;
1625 int r = 0;
1626
1627 init_state = 0;
1628
1629 if (pdev->num_resources != 0) {
1630 dev_err(&pdev->dev, "probed for an unknown device\n");
1631 r = -ENODEV;
1632 goto cleanup;
1633 }
1634
1635 if (dev_get_platdata(&pdev->dev) == NULL) {
1636 dev_err(&pdev->dev, "missing platform data\n");
1637 r = -ENOENT;
1638 goto cleanup;
1639 }
1640
1641 fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
1642 if (fbdev == NULL) {
1643 dev_err(&pdev->dev,
1644 "unable to allocate memory for device info\n");
1645 r = -ENOMEM;
1646 goto cleanup;
1647 }
1648 init_state++;
1649
1650 fbdev->dev = &pdev->dev;
1651 fbdev->panel = panel;
1652 fbdev->dssdev = &omapdss_device;
1653 platform_set_drvdata(pdev, fbdev);
1654
1655 mutex_init(&fbdev->rqueue_mutex);
1656
1657 fbdev->int_ctrl = &omap1_int_ctrl;
1658 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
1659 fbdev->ext_if = &omap1_ext_if;
1660 #endif
1661 if (omapfb_find_ctrl(fbdev) < 0) {
1662 dev_err(fbdev->dev,
1663 "LCD controller not found, board not supported\n");
1664 r = -ENODEV;
1665 goto cleanup;
1666 }
1667
1668 if (fbdev->panel->init) {
1669 r = fbdev->panel->init(fbdev->panel, fbdev);
1670 if (r)
1671 goto cleanup;
1672 }
1673
1674 pr_info("omapfb: configured for panel %s\n", fbdev->panel->name);
1675
1676 def_vxres = def_vxres ? def_vxres : fbdev->panel->x_res;
1677 def_vyres = def_vyres ? def_vyres : fbdev->panel->y_res;
1678
1679 init_state++;
1680
1681 r = ctrl_init(fbdev);
1682 if (r)
1683 goto cleanup;
1684 if (fbdev->ctrl->mmap != NULL)
1685 omapfb_ops.fb_mmap = omapfb_mmap;
1686 init_state++;
1687
1688 r = planes_init(fbdev);
1689 if (r)
1690 goto cleanup;
1691 init_state++;
1692
1693 #ifdef CONFIG_FB_OMAP_DMA_TUNE
1694 /* Set DMA priority for EMIFF access to highest */
1695 omap_set_dma_priority(0, OMAP_DMA_PORT_EMIFF, 15);
1696 #endif
1697
1698 r = ctrl_change_mode(fbdev->fb_info[0]);
1699 if (r) {
1700 dev_err(fbdev->dev, "mode setting failed\n");
1701 goto cleanup;
1702 }
1703
1704 /* GFX plane is enabled by default */
1705 r = fbdev->ctrl->enable_plane(OMAPFB_PLANE_GFX, 1);
1706 if (r)
1707 goto cleanup;
1708
1709 omapfb_set_update_mode(fbdev, manual_update ?
1710 OMAPFB_MANUAL_UPDATE : OMAPFB_AUTO_UPDATE);
1711 init_state++;
1712
1713 if (fbdev->panel->enable) {
1714 r = fbdev->panel->enable(fbdev->panel);
1715 if (r)
1716 goto cleanup;
1717 }
1718 init_state++;
1719
1720 r = omapfb_register_sysfs(fbdev);
1721 if (r)
1722 goto cleanup;
1723 init_state++;
1724
1725 vram = 0;
1726 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1727 r = register_framebuffer(fbdev->fb_info[i]);
1728 if (r != 0) {
1729 dev_err(fbdev->dev,
1730 "registering framebuffer %d failed\n", i);
1731 goto cleanup;
1732 }
1733 vram += fbdev->mem_desc.region[i].size;
1734 }
1735
1736 fbdev->state = OMAPFB_ACTIVE;
1737
1738 panel = fbdev->panel;
1739 phz = panel->pixel_clock * 1000;
1740 hhz = phz * 10 / (panel->hfp + panel->x_res + panel->hbp + panel->hsw);
1741 vhz = hhz / (panel->vfp + panel->y_res + panel->vbp + panel->vsw);
1742
1743 omapfb_dev = fbdev;
1744
1745 pr_info("omapfb: Framebuffer initialized. Total vram %lu planes %d\n",
1746 vram, fbdev->mem_desc.region_cnt);
1747 pr_info("omapfb: Pixclock %lu kHz hfreq %lu.%lu kHz "
1748 "vfreq %lu.%lu Hz\n",
1749 phz / 1000, hhz / 10000, hhz % 10, vhz / 10, vhz % 10);
1750
1751 return 0;
1752
1753 cleanup:
1754 omapfb_free_resources(fbdev, init_state);
1755
1756 return r;
1757 }
1758
1759 static int omapfb_probe(struct platform_device *pdev)
1760 {
1761 int r;
1762
1763 BUG_ON(fbdev_pdev != NULL);
1764
1765 r = platform_device_register(&omapdss_device);
1766 if (r) {
1767 dev_err(&pdev->dev, "can't register omapdss device\n");
1768 return r;
1769 }
1770
1771 /* Delay actual initialization until the LCD is registered */
1772 fbdev_pdev = pdev;
1773 if (fbdev_panel != NULL)
1774 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1775 return 0;
1776 }
1777
1778 void omapfb_register_panel(struct lcd_panel *panel)
1779 {
1780 BUG_ON(fbdev_panel != NULL);
1781
1782 fbdev_panel = panel;
1783 if (fbdev_pdev != NULL)
1784 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1785 }
1786 EXPORT_SYMBOL_GPL(omapfb_register_panel);
1787
1788 /* Called when the device is being detached from the driver */
1789 static int omapfb_remove(struct platform_device *pdev)
1790 {
1791 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1792 enum omapfb_state saved_state = fbdev->state;
1793
1794 /* FIXME: wait till completion of pending events */
1795
1796 fbdev->state = OMAPFB_DISABLED;
1797 omapfb_free_resources(fbdev, saved_state);
1798
1799 platform_device_unregister(&omapdss_device);
1800 fbdev->dssdev = NULL;
1801
1802 return 0;
1803 }
1804
1805 /* PM suspend */
1806 static int omapfb_suspend(struct platform_device *pdev, pm_message_t mesg)
1807 {
1808 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1809
1810 if (fbdev != NULL)
1811 omapfb_blank(FB_BLANK_POWERDOWN, fbdev->fb_info[0]);
1812 return 0;
1813 }
1814
1815 /* PM resume */
1816 static int omapfb_resume(struct platform_device *pdev)
1817 {
1818 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1819
1820 if (fbdev != NULL)
1821 omapfb_blank(FB_BLANK_UNBLANK, fbdev->fb_info[0]);
1822 return 0;
1823 }
1824
1825 static struct platform_driver omapfb_driver = {
1826 .probe = omapfb_probe,
1827 .remove = omapfb_remove,
1828 .suspend = omapfb_suspend,
1829 .resume = omapfb_resume,
1830 .driver = {
1831 .name = MODULE_NAME,
1832 },
1833 };
1834
1835 #ifndef MODULE
1836
1837 /* Process kernel command line parameters */
1838 static int __init omapfb_setup(char *options)
1839 {
1840 char *this_opt = NULL;
1841 int r = 0;
1842
1843 pr_debug("omapfb: options %s\n", options);
1844
1845 if (!options || !*options)
1846 return 0;
1847
1848 while (!r && (this_opt = strsep(&options, ",")) != NULL) {
1849 if (!strncmp(this_opt, "accel", 5))
1850 def_accel = 1;
1851 else if (!strncmp(this_opt, "vram:", 5)) {
1852 char *suffix;
1853 unsigned long vram;
1854 vram = (simple_strtoul(this_opt + 5, &suffix, 0));
1855 switch (suffix[0]) {
1856 case '\0':
1857 break;
1858 case 'm':
1859 case 'M':
1860 vram *= 1024;
1861 /* Fall through */
1862 case 'k':
1863 case 'K':
1864 vram *= 1024;
1865 break;
1866 default:
1867 pr_debug("omapfb: invalid vram suffix %c\n",
1868 suffix[0]);
1869 r = -1;
1870 }
1871 def_vram[def_vram_cnt++] = vram;
1872 }
1873 else if (!strncmp(this_opt, "vxres:", 6))
1874 def_vxres = simple_strtoul(this_opt + 6, NULL, 0);
1875 else if (!strncmp(this_opt, "vyres:", 6))
1876 def_vyres = simple_strtoul(this_opt + 6, NULL, 0);
1877 else if (!strncmp(this_opt, "rotate:", 7))
1878 def_rotate = (simple_strtoul(this_opt + 7, NULL, 0));
1879 else if (!strncmp(this_opt, "mirror:", 7))
1880 def_mirror = (simple_strtoul(this_opt + 7, NULL, 0));
1881 else if (!strncmp(this_opt, "manual_update", 13))
1882 manual_update = 1;
1883 else {
1884 pr_debug("omapfb: invalid option\n");
1885 r = -1;
1886 }
1887 }
1888
1889 return r;
1890 }
1891
1892 #endif
1893
1894 /* Register both the driver and the device */
1895 static int __init omapfb_init(void)
1896 {
1897 #ifndef MODULE
1898 char *option;
1899
1900 if (fb_get_options("omapfb", &option))
1901 return -ENODEV;
1902 omapfb_setup(option);
1903 #endif
1904 /* Register the driver with LDM */
1905 if (platform_driver_register(&omapfb_driver)) {
1906 pr_debug("failed to register omapfb driver\n");
1907 return -ENODEV;
1908 }
1909
1910 return 0;
1911 }
1912
1913 static void __exit omapfb_cleanup(void)
1914 {
1915 platform_driver_unregister(&omapfb_driver);
1916 }
1917
1918 module_param_named(accel, def_accel, uint, 0664);
1919 module_param_array_named(vram, def_vram, ulong, &def_vram_cnt, 0664);
1920 module_param_named(vxres, def_vxres, long, 0664);
1921 module_param_named(vyres, def_vyres, long, 0664);
1922 module_param_named(rotate, def_rotate, uint, 0664);
1923 module_param_named(mirror, def_mirror, uint, 0664);
1924 module_param_named(manual_update, manual_update, bool, 0664);
1925
1926 module_init(omapfb_init);
1927 module_exit(omapfb_cleanup);
1928
1929 MODULE_DESCRIPTION("TI OMAP framebuffer driver");
1930 MODULE_AUTHOR("Imre Deak <imre.deak@nokia.com>");
1931 MODULE_LICENSE("GPL");
Linux with added FPC-III support