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First Support on Ginger and OMAP TI
[linux-ginger.git] / drivers / video / omap / omapfb_main.c
blobc7f59a5ccdbc3866ac8a19a24ca38582bb6822f2
1 /*
2 * Framebuffer driver for TI OMAP boards
3 *
4 * Copyright (C) 2004 Nokia Corporation
5 * Author: Imre Deak <imre.deak@nokia.com>
6 *
7 * Acknowledgements:
8 * Alex McMains <aam@ridgerun.com> - Original driver
9 * Juha Yrjola <juha.yrjola@nokia.com> - Original driver and improvements
10 * Dirk Behme <dirk.behme@de.bosch.com> - changes for 2.6 kernel API
11 * Texas Instruments - H3 support
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful, but
19 * WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License along
24 * with this program; if not, write to the Free Software Foundation, Inc.,
25 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 */
27 #include <linux/platform_device.h>
28 #include <linux/mm.h>
29 #include <linux/uaccess.h>
30
31 #include <plat/dma.h>
32
33 #include "omapfb.h"
34 #include "lcdc.h"
35 #include "dispc.h"
36
37 #define MODULE_NAME "omapfb"
38
39 static unsigned int def_accel;
40 static unsigned long def_vram[OMAPFB_PLANE_NUM];
41 static unsigned int def_vram_cnt;
42 static unsigned long def_vxres;
43 static unsigned long def_vyres;
44 static unsigned int def_rotate;
45 static unsigned int def_mirror;
46
47 #ifdef CONFIG_FB_OMAP_MANUAL_UPDATE
48 static int manual_update = 1;
49 #else
50 static int manual_update;
51 #endif
52
53 static struct platform_device *fbdev_pdev;
54 static struct lcd_panel *fbdev_panel;
55 static struct omapfb_device *omapfb_dev;
56
57 struct caps_table_struct {
58 unsigned long flag;
59 const char *name;
60 };
61
62 static struct caps_table_struct ctrl_caps[] = {
63 { OMAPFB_CAPS_MANUAL_UPDATE, "manual update" },
64 { OMAPFB_CAPS_TEARSYNC, "tearing synchronization" },
65 { OMAPFB_CAPS_PLANE_RELOCATE_MEM, "relocate plane memory" },
66 { OMAPFB_CAPS_PLANE_SCALE, "scale plane" },
67 { OMAPFB_CAPS_WINDOW_PIXEL_DOUBLE, "pixel double window" },
68 { OMAPFB_CAPS_WINDOW_SCALE, "scale window" },
69 { OMAPFB_CAPS_WINDOW_OVERLAY, "overlay window" },
70 { OMAPFB_CAPS_WINDOW_ROTATE, "rotate window" },
71 { OMAPFB_CAPS_SET_BACKLIGHT, "backlight setting" },
72 };
73
74 static struct caps_table_struct color_caps[] = {
75 { 1 << OMAPFB_COLOR_RGB565, "RGB565", },
76 { 1 << OMAPFB_COLOR_YUV422, "YUV422", },
77 { 1 << OMAPFB_COLOR_YUV420, "YUV420", },
78 { 1 << OMAPFB_COLOR_CLUT_8BPP, "CLUT8", },
79 { 1 << OMAPFB_COLOR_CLUT_4BPP, "CLUT4", },
80 { 1 << OMAPFB_COLOR_CLUT_2BPP, "CLUT2", },
81 { 1 << OMAPFB_COLOR_CLUT_1BPP, "CLUT1", },
82 { 1 << OMAPFB_COLOR_RGB444, "RGB444", },
83 { 1 << OMAPFB_COLOR_YUY422, "YUY422", },
84 };
85
86 /*
87 * ---------------------------------------------------------------------------
88 * LCD panel
89 * ---------------------------------------------------------------------------
90 */
91 extern struct lcd_ctrl hwa742_ctrl;
92 extern struct lcd_ctrl blizzard_ctrl;
93
94 static const struct lcd_ctrl *ctrls[] = {
95 #ifdef CONFIG_ARCH_OMAP1
96 &omap1_int_ctrl,
97 #else
98 &omap2_int_ctrl,
99 #endif
100
101 #ifdef CONFIG_FB_OMAP_LCDC_HWA742
102 &hwa742_ctrl,
103 #endif
104 #ifdef CONFIG_FB_OMAP_LCDC_BLIZZARD
105 &blizzard_ctrl,
106 #endif
107 };
108
109 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
110 #ifdef CONFIG_ARCH_OMAP1
111 extern struct lcd_ctrl_extif omap1_ext_if;
112 #else
113 extern struct lcd_ctrl_extif omap2_ext_if;
114 #endif
115 #endif
116
117 static void omapfb_rqueue_lock(struct omapfb_device *fbdev)
118 {
119 mutex_lock(&fbdev->rqueue_mutex);
120 }
121
122 static void omapfb_rqueue_unlock(struct omapfb_device *fbdev)
123 {
124 mutex_unlock(&fbdev->rqueue_mutex);
125 }
126
127 /*
128 * ---------------------------------------------------------------------------
129 * LCD controller and LCD DMA
130 * ---------------------------------------------------------------------------
131 */
132 /* Lookup table to map elem size to elem type. */
133 static const int dma_elem_type[] = {
134 0,
135 OMAP_DMA_DATA_TYPE_S8,
136 OMAP_DMA_DATA_TYPE_S16,
137 0,
138 OMAP_DMA_DATA_TYPE_S32,
139 };
140
141 /*
142 * Allocate resources needed for LCD controller and LCD DMA operations. Video
143 * memory is allocated from system memory according to the virtual display
144 * size, except if a bigger memory size is specified explicitly as a kernel
145 * parameter.
146 */
147 static int ctrl_init(struct omapfb_device *fbdev)
148 {
149 int r;
150 int i;
151
152 /* kernel/module vram parameters override boot tags/board config */
153 if (def_vram_cnt) {
154 for (i = 0; i < def_vram_cnt; i++)
155 fbdev->mem_desc.region[i].size =
156 PAGE_ALIGN(def_vram[i]);
157 fbdev->mem_desc.region_cnt = i;
158 } else {
159 struct omapfb_platform_data *conf;
160
161 conf = fbdev->dev->platform_data;
162 fbdev->mem_desc = conf->mem_desc;
163 }
164
165 if (!fbdev->mem_desc.region_cnt) {
166 struct lcd_panel *panel = fbdev->panel;
167 int def_size;
168 int bpp = panel->bpp;
169
170 /* 12 bpp is packed in 16 bits */
171 if (bpp == 12)
172 bpp = 16;
173 def_size = def_vxres * def_vyres * bpp / 8;
174 fbdev->mem_desc.region_cnt = 1;
175 fbdev->mem_desc.region[0].size = PAGE_ALIGN(def_size);
176 }
177 r = fbdev->ctrl->init(fbdev, 0, &fbdev->mem_desc);
178 if (r < 0) {
179 dev_err(fbdev->dev, "controller initialization failed (%d)\n",
180 r);
181 return r;
182 }
183
184 #ifdef DEBUG
185 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
186 dev_dbg(fbdev->dev, "region%d phys %08x virt %p size=%lu\n",
187 i,
188 fbdev->mem_desc.region[i].paddr,
189 fbdev->mem_desc.region[i].vaddr,
190 fbdev->mem_desc.region[i].size);
191 }
192 #endif
193 return 0;
194 }
195
196 static void ctrl_cleanup(struct omapfb_device *fbdev)
197 {
198 fbdev->ctrl->cleanup();
199 }
200
201 /* Must be called with fbdev->rqueue_mutex held. */
202 static int ctrl_change_mode(struct fb_info *fbi)
203 {
204 int r;
205 unsigned long offset;
206 struct omapfb_plane_struct *plane = fbi->par;
207 struct omapfb_device *fbdev = plane->fbdev;
208 struct fb_var_screeninfo *var = &fbi->var;
209
210 offset = var->yoffset * fbi->fix.line_length +
211 var->xoffset * var->bits_per_pixel / 8;
212
213 if (fbdev->ctrl->sync)
214 fbdev->ctrl->sync();
215 r = fbdev->ctrl->setup_plane(plane->idx, plane->info.channel_out,
216 offset, var->xres_virtual,
217 plane->info.pos_x, plane->info.pos_y,
218 var->xres, var->yres, plane->color_mode);
219 if (r < 0)
220 return r;
221
222 if (fbdev->ctrl->set_rotate != NULL) {
223 r = fbdev->ctrl->set_rotate(var->rotate);
224 if (r < 0)
225 return r;
226 }
227
228 if (fbdev->ctrl->set_scale != NULL)
229 r = fbdev->ctrl->set_scale(plane->idx,
230 var->xres, var->yres,
231 plane->info.out_width,
232 plane->info.out_height);
233
234 return r;
235 }
236
237 /*
238 * ---------------------------------------------------------------------------
239 * fbdev framework callbacks and the ioctl interface
240 * ---------------------------------------------------------------------------
241 */
242 /* Called each time the omapfb device is opened */
243 static int omapfb_open(struct fb_info *info, int user)
244 {
245 return 0;
246 }
247
248 static void omapfb_sync(struct fb_info *info);
249
250 /* Called when the omapfb device is closed. We make sure that any pending
251 * gfx DMA operations are ended, before we return. */
252 static int omapfb_release(struct fb_info *info, int user)
253 {
254 omapfb_sync(info);
255 return 0;
256 }
257
258 /* Store a single color palette entry into a pseudo palette or the hardware
259 * palette if one is available. For now we support only 16bpp and thus store
260 * the entry only to the pseudo palette.
261 */
262 static int _setcolreg(struct fb_info *info, u_int regno, u_int red, u_int green,
263 u_int blue, u_int transp, int update_hw_pal)
264 {
265 struct omapfb_plane_struct *plane = info->par;
266 struct omapfb_device *fbdev = plane->fbdev;
267 struct fb_var_screeninfo *var = &info->var;
268 int r = 0;
269
270 switch (plane->color_mode) {
271 case OMAPFB_COLOR_YUV422:
272 case OMAPFB_COLOR_YUV420:
273 case OMAPFB_COLOR_YUY422:
274 r = -EINVAL;
275 break;
276 case OMAPFB_COLOR_CLUT_8BPP:
277 case OMAPFB_COLOR_CLUT_4BPP:
278 case OMAPFB_COLOR_CLUT_2BPP:
279 case OMAPFB_COLOR_CLUT_1BPP:
280 if (fbdev->ctrl->setcolreg)
281 r = fbdev->ctrl->setcolreg(regno, red, green, blue,
282 transp, update_hw_pal);
283 /* Fallthrough */
284 case OMAPFB_COLOR_RGB565:
285 case OMAPFB_COLOR_RGB444:
286 if (r != 0)
287 break;
288
289 if (regno < 0) {
290 r = -EINVAL;
291 break;
292 }
293
294 if (regno < 16) {
295 u16 pal;
296 pal = ((red >> (16 - var->red.length)) <<
297 var->red.offset) |
298 ((green >> (16 - var->green.length)) <<
299 var->green.offset) |
300 (blue >> (16 - var->blue.length));
301 ((u32 *)(info->pseudo_palette))[regno] = pal;
302 }
303 break;
304 default:
305 BUG();
306 }
307 return r;
308 }
309
310 static int omapfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
311 u_int transp, struct fb_info *info)
312 {
313 return _setcolreg(info, regno, red, green, blue, transp, 1);
314 }
315
316 static int omapfb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
317 {
318 int count, index, r;
319 u16 *red, *green, *blue, *transp;
320 u16 trans = 0xffff;
321
322 red = cmap->red;
323 green = cmap->green;
324 blue = cmap->blue;
325 transp = cmap->transp;
326 index = cmap->start;
327
328 for (count = 0; count < cmap->len; count++) {
329 if (transp)
330 trans = *transp++;
331 r = _setcolreg(info, index++, *red++, *green++, *blue++, trans,
332 count == cmap->len - 1);
333 if (r != 0)
334 return r;
335 }
336
337 return 0;
338 }
339
340 static int omapfb_update_full_screen(struct fb_info *fbi);
341
342 static int omapfb_blank(int blank, struct fb_info *fbi)
343 {
344 struct omapfb_plane_struct *plane = fbi->par;
345 struct omapfb_device *fbdev = plane->fbdev;
346 int do_update = 0;
347 int r = 0;
348
349 omapfb_rqueue_lock(fbdev);
350 switch (blank) {
351 case FB_BLANK_UNBLANK:
352 if (fbdev->state == OMAPFB_SUSPENDED) {
353 if (fbdev->ctrl->resume)
354 fbdev->ctrl->resume();
355 fbdev->panel->enable(fbdev->panel);
356 fbdev->state = OMAPFB_ACTIVE;
357 if (fbdev->ctrl->get_update_mode() ==
358 OMAPFB_MANUAL_UPDATE)
359 do_update = 1;
360 }
361 break;
362 case FB_BLANK_POWERDOWN:
363 if (fbdev->state == OMAPFB_ACTIVE) {
364 fbdev->panel->disable(fbdev->panel);
365 if (fbdev->ctrl->suspend)
366 fbdev->ctrl->suspend();
367 fbdev->state = OMAPFB_SUSPENDED;
368 }
369 break;
370 default:
371 r = -EINVAL;
372 }
373 omapfb_rqueue_unlock(fbdev);
374
375 if (r == 0 && do_update)
376 r = omapfb_update_full_screen(fbi);
377
378 return r;
379 }
380
381 static void omapfb_sync(struct fb_info *fbi)
382 {
383 struct omapfb_plane_struct *plane = fbi->par;
384 struct omapfb_device *fbdev = plane->fbdev;
385
386 omapfb_rqueue_lock(fbdev);
387 if (fbdev->ctrl->sync)
388 fbdev->ctrl->sync();
389 omapfb_rqueue_unlock(fbdev);
390 }
391
392 /*
393 * Set fb_info.fix fields and also updates fbdev.
394 * When calling this fb_info.var must be set up already.
395 */
396 static void set_fb_fix(struct fb_info *fbi, int from_init)
397 {
398 struct fb_fix_screeninfo *fix = &fbi->fix;
399 struct fb_var_screeninfo *var = &fbi->var;
400 struct omapfb_plane_struct *plane = fbi->par;
401 struct omapfb_mem_region *rg;
402 int bpp;
403
404 rg = &plane->fbdev->mem_desc.region[plane->idx];
405 fbi->screen_base = rg->vaddr;
406
407 if (!from_init) {
408 mutex_lock(&fbi->mm_lock);
409 fix->smem_start = rg->paddr;
410 fix->smem_len = rg->size;
411 mutex_unlock(&fbi->mm_lock);
412 } else {
413 fix->smem_start = rg->paddr;
414 fix->smem_len = rg->size;
415 }
416
417 fix->type = FB_TYPE_PACKED_PIXELS;
418 bpp = var->bits_per_pixel;
419 if (var->nonstd)
420 fix->visual = FB_VISUAL_PSEUDOCOLOR;
421 else switch (var->bits_per_pixel) {
422 case 16:
423 case 12:
424 fix->visual = FB_VISUAL_TRUECOLOR;
425 /* 12bpp is stored in 16 bits */
426 bpp = 16;
427 break;
428 case 1:
429 case 2:
430 case 4:
431 case 8:
432 fix->visual = FB_VISUAL_PSEUDOCOLOR;
433 break;
434 }
435 fix->accel = FB_ACCEL_OMAP1610;
436 fix->line_length = var->xres_virtual * bpp / 8;
437 }
438
439 static int set_color_mode(struct omapfb_plane_struct *plane,
440 struct fb_var_screeninfo *var)
441 {
442 switch (var->nonstd) {
443 case 0:
444 break;
445 case OMAPFB_COLOR_YUV422:
446 var->bits_per_pixel = 16;
447 plane->color_mode = var->nonstd;
448 return 0;
449 case OMAPFB_COLOR_YUV420:
450 var->bits_per_pixel = 12;
451 plane->color_mode = var->nonstd;
452 return 0;
453 case OMAPFB_COLOR_YUY422:
454 var->bits_per_pixel = 16;
455 plane->color_mode = var->nonstd;
456 return 0;
457 default:
458 return -EINVAL;
459 }
460
461 switch (var->bits_per_pixel) {
462 case 1:
463 plane->color_mode = OMAPFB_COLOR_CLUT_1BPP;
464 return 0;
465 case 2:
466 plane->color_mode = OMAPFB_COLOR_CLUT_2BPP;
467 return 0;
468 case 4:
469 plane->color_mode = OMAPFB_COLOR_CLUT_4BPP;
470 return 0;
471 case 8:
472 plane->color_mode = OMAPFB_COLOR_CLUT_8BPP;
473 return 0;
474 case 12:
475 var->bits_per_pixel = 16;
476 plane->color_mode = OMAPFB_COLOR_RGB444;
477 return 0;
478 case 16:
479 plane->color_mode = OMAPFB_COLOR_RGB565;
480 return 0;
481 default:
482 return -EINVAL;
483 }
484 }
485
486 /*
487 * Check the values in var against our capabilities and in case of out of
488 * bound values try to adjust them.
489 */
490 static int set_fb_var(struct fb_info *fbi,
491 struct fb_var_screeninfo *var)
492 {
493 int bpp;
494 unsigned long max_frame_size;
495 unsigned long line_size;
496 int xres_min, xres_max;
497 int yres_min, yres_max;
498 struct omapfb_plane_struct *plane = fbi->par;
499 struct omapfb_device *fbdev = plane->fbdev;
500 struct lcd_panel *panel = fbdev->panel;
501
502 if (set_color_mode(plane, var) < 0)
503 return -EINVAL;
504
505 bpp = var->bits_per_pixel;
506 if (plane->color_mode == OMAPFB_COLOR_RGB444)
507 bpp = 16;
508
509 switch (var->rotate) {
510 case 0:
511 case 180:
512 xres_min = OMAPFB_PLANE_XRES_MIN;
513 xres_max = panel->x_res;
514 yres_min = OMAPFB_PLANE_YRES_MIN;
515 yres_max = panel->y_res;
516 if (cpu_is_omap15xx()) {
517 var->xres = panel->x_res;
518 var->yres = panel->y_res;
519 }
520 break;
521 case 90:
522 case 270:
523 xres_min = OMAPFB_PLANE_YRES_MIN;
524 xres_max = panel->y_res;
525 yres_min = OMAPFB_PLANE_XRES_MIN;
526 yres_max = panel->x_res;
527 if (cpu_is_omap15xx()) {
528 var->xres = panel->y_res;
529 var->yres = panel->x_res;
530 }
531 break;
532 default:
533 return -EINVAL;
534 }
535
536 if (var->xres < xres_min)
537 var->xres = xres_min;
538 if (var->yres < yres_min)
539 var->yres = yres_min;
540 if (var->xres > xres_max)
541 var->xres = xres_max;
542 if (var->yres > yres_max)
543 var->yres = yres_max;
544
545 if (var->xres_virtual < var->xres)
546 var->xres_virtual = var->xres;
547 if (var->yres_virtual < var->yres)
548 var->yres_virtual = var->yres;
549 max_frame_size = fbdev->mem_desc.region[plane->idx].size;
550 line_size = var->xres_virtual * bpp / 8;
551 if (line_size * var->yres_virtual > max_frame_size) {
552 /* Try to keep yres_virtual first */
553 line_size = max_frame_size / var->yres_virtual;
554 var->xres_virtual = line_size * 8 / bpp;
555 if (var->xres_virtual < var->xres) {
556 /* Still doesn't fit. Shrink yres_virtual too */
557 var->xres_virtual = var->xres;
558 line_size = var->xres * bpp / 8;
559 var->yres_virtual = max_frame_size / line_size;
560 }
561 /* Recheck this, as the virtual size changed. */
562 if (var->xres_virtual < var->xres)
563 var->xres = var->xres_virtual;
564 if (var->yres_virtual < var->yres)
565 var->yres = var->yres_virtual;
566 if (var->xres < xres_min || var->yres < yres_min)
567 return -EINVAL;
568 }
569 if (var->xres + var->xoffset > var->xres_virtual)
570 var->xoffset = var->xres_virtual - var->xres;
571 if (var->yres + var->yoffset > var->yres_virtual)
572 var->yoffset = var->yres_virtual - var->yres;
573
574 if (plane->color_mode == OMAPFB_COLOR_RGB444) {
575 var->red.offset = 8; var->red.length = 4;
576 var->red.msb_right = 0;
577 var->green.offset = 4; var->green.length = 4;
578 var->green.msb_right = 0;
579 var->blue.offset = 0; var->blue.length = 4;
580 var->blue.msb_right = 0;
581 } else {
582 var->red.offset = 11; var->red.length = 5;
583 var->red.msb_right = 0;
584 var->green.offset = 5; var->green.length = 6;
585 var->green.msb_right = 0;
586 var->blue.offset = 0; var->blue.length = 5;
587 var->blue.msb_right = 0;
588 }
589
590 var->height = -1;
591 var->width = -1;
592 var->grayscale = 0;
593
594 /* pixclock in ps, the rest in pixclock */
595 var->pixclock = 10000000 / (panel->pixel_clock / 100);
596 var->left_margin = panel->hfp;
597 var->right_margin = panel->hbp;
598 var->upper_margin = panel->vfp;
599 var->lower_margin = panel->vbp;
600 var->hsync_len = panel->hsw;
601 var->vsync_len = panel->vsw;
602
603 /* TODO: get these from panel->config */
604 var->vmode = FB_VMODE_NONINTERLACED;
605 var->sync = 0;
606
607 return 0;
608 }
609
610
611 /* Set rotation (0, 90, 180, 270 degree), and switch to the new mode. */
612 static void omapfb_rotate(struct fb_info *fbi, int rotate)
613 {
614 struct omapfb_plane_struct *plane = fbi->par;
615 struct omapfb_device *fbdev = plane->fbdev;
616
617 omapfb_rqueue_lock(fbdev);
618 if (rotate != fbi->var.rotate) {
619 struct fb_var_screeninfo *new_var = &fbdev->new_var;
620
621 memcpy(new_var, &fbi->var, sizeof(*new_var));
622 new_var->rotate = rotate;
623 if (set_fb_var(fbi, new_var) == 0 &&
624 memcmp(new_var, &fbi->var, sizeof(*new_var))) {
625 memcpy(&fbi->var, new_var, sizeof(*new_var));
626 ctrl_change_mode(fbi);
627 }
628 }
629 omapfb_rqueue_unlock(fbdev);
630 }
631
632 /*
633 * Set new x,y offsets in the virtual display for the visible area and switch
634 * to the new mode.
635 */
636 static int omapfb_pan_display(struct fb_var_screeninfo *var,
637 struct fb_info *fbi)
638 {
639 struct omapfb_plane_struct *plane = fbi->par;
640 struct omapfb_device *fbdev = plane->fbdev;
641 int r = 0;
642
643 omapfb_rqueue_lock(fbdev);
644 if (var->xoffset != fbi->var.xoffset ||
645 var->yoffset != fbi->var.yoffset) {
646 struct fb_var_screeninfo *new_var = &fbdev->new_var;
647
648 memcpy(new_var, &fbi->var, sizeof(*new_var));
649 new_var->xoffset = var->xoffset;
650 new_var->yoffset = var->yoffset;
651 if (set_fb_var(fbi, new_var))
652 r = -EINVAL;
653 else {
654 memcpy(&fbi->var, new_var, sizeof(*new_var));
655 ctrl_change_mode(fbi);
656 }
657 }
658 omapfb_rqueue_unlock(fbdev);
659
660 return r;
661 }
662
663 /* Set mirror to vertical axis and switch to the new mode. */
664 static int omapfb_mirror(struct fb_info *fbi, int mirror)
665 {
666 struct omapfb_plane_struct *plane = fbi->par;
667 struct omapfb_device *fbdev = plane->fbdev;
668 int r = 0;
669
670 omapfb_rqueue_lock(fbdev);
671 mirror = mirror ? 1 : 0;
672 if (cpu_is_omap15xx())
673 r = -EINVAL;
674 else if (mirror != plane->info.mirror) {
675 plane->info.mirror = mirror;
676 r = ctrl_change_mode(fbi);
677 }
678 omapfb_rqueue_unlock(fbdev);
679
680 return r;
681 }
682
683 /*
684 * Check values in var, try to adjust them in case of out of bound values if
685 * possible, or return error.
686 */
687 static int omapfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
688 {
689 struct omapfb_plane_struct *plane = fbi->par;
690 struct omapfb_device *fbdev = plane->fbdev;
691 int r;
692
693 omapfb_rqueue_lock(fbdev);
694 if (fbdev->ctrl->sync != NULL)
695 fbdev->ctrl->sync();
696 r = set_fb_var(fbi, var);
697 omapfb_rqueue_unlock(fbdev);
698
699 return r;
700 }
701
702 /*
703 * Switch to a new mode. The parameters for it has been check already by
704 * omapfb_check_var.
705 */
706 static int omapfb_set_par(struct fb_info *fbi)
707 {
708 struct omapfb_plane_struct *plane = fbi->par;
709 struct omapfb_device *fbdev = plane->fbdev;
710 int r = 0;
711
712 omapfb_rqueue_lock(fbdev);
713 set_fb_fix(fbi, 0);
714 r = ctrl_change_mode(fbi);
715 omapfb_rqueue_unlock(fbdev);
716
717 return r;
718 }
719
720 int omapfb_update_window_async(struct fb_info *fbi,
721 struct omapfb_update_window *win,
722 void (*callback)(void *),
723 void *callback_data)
724 {
725 int xres, yres;
726 struct omapfb_plane_struct *plane = fbi->par;
727 struct omapfb_device *fbdev = plane->fbdev;
728 struct fb_var_screeninfo *var = &fbi->var;
729
730 switch (var->rotate) {
731 case 0:
732 case 180:
733 xres = fbdev->panel->x_res;
734 yres = fbdev->panel->y_res;
735 break;
736 case 90:
737 case 270:
738 xres = fbdev->panel->y_res;
739 yres = fbdev->panel->x_res;
740 break;
741 default:
742 return -EINVAL;
743 }
744
745 if (win->x >= xres || win->y >= yres ||
746 win->out_x > xres || win->out_y > yres)
747 return -EINVAL;
748
749 if (!fbdev->ctrl->update_window ||
750 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
751 return -ENODEV;
752
753 if (win->x + win->width > xres)
754 win->width = xres - win->x;
755 if (win->y + win->height > yres)
756 win->height = yres - win->y;
757 if (win->out_x + win->out_width > xres)
758 win->out_width = xres - win->out_x;
759 if (win->out_y + win->out_height > yres)
760 win->out_height = yres - win->out_y;
761 if (!win->width || !win->height || !win->out_width || !win->out_height)
762 return 0;
763
764 return fbdev->ctrl->update_window(fbi, win, callback, callback_data);
765 }
766 EXPORT_SYMBOL(omapfb_update_window_async);
767
768 static int omapfb_update_win(struct fb_info *fbi,
769 struct omapfb_update_window *win)
770 {
771 struct omapfb_plane_struct *plane = fbi->par;
772 int ret;
773
774 omapfb_rqueue_lock(plane->fbdev);
775 ret = omapfb_update_window_async(fbi, win, NULL, NULL);
776 omapfb_rqueue_unlock(plane->fbdev);
777
778 return ret;
779 }
780
781 static int omapfb_update_full_screen(struct fb_info *fbi)
782 {
783 struct omapfb_plane_struct *plane = fbi->par;
784 struct omapfb_device *fbdev = plane->fbdev;
785 struct omapfb_update_window win;
786 int r;
787
788 if (!fbdev->ctrl->update_window ||
789 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
790 return -ENODEV;
791
792 win.x = 0;
793 win.y = 0;
794 win.width = fbi->var.xres;
795 win.height = fbi->var.yres;
796 win.out_x = 0;
797 win.out_y = 0;
798 win.out_width = fbi->var.xres;
799 win.out_height = fbi->var.yres;
800 win.format = 0;
801
802 omapfb_rqueue_lock(fbdev);
803 r = fbdev->ctrl->update_window(fbi, &win, NULL, NULL);
804 omapfb_rqueue_unlock(fbdev);
805
806 return r;
807 }
808
809 static int omapfb_setup_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
810 {
811 struct omapfb_plane_struct *plane = fbi->par;
812 struct omapfb_device *fbdev = plane->fbdev;
813 struct lcd_panel *panel = fbdev->panel;
814 struct omapfb_plane_info old_info;
815 int r = 0;
816
817 if (pi->pos_x + pi->out_width > panel->x_res ||
818 pi->pos_y + pi->out_height > panel->y_res)
819 return -EINVAL;
820
821 omapfb_rqueue_lock(fbdev);
822 if (pi->enabled && !fbdev->mem_desc.region[plane->idx].size) {
823 /*
824 * This plane's memory was freed, can't enable it
825 * until it's reallocated.
826 */
827 r = -EINVAL;
828 goto out;
829 }
830 old_info = plane->info;
831 plane->info = *pi;
832 if (pi->enabled) {
833 r = ctrl_change_mode(fbi);
834 if (r < 0) {
835 plane->info = old_info;
836 goto out;
837 }
838 }
839 r = fbdev->ctrl->enable_plane(plane->idx, pi->enabled);
840 if (r < 0) {
841 plane->info = old_info;
842 goto out;
843 }
844 out:
845 omapfb_rqueue_unlock(fbdev);
846 return r;
847 }
848
849 static int omapfb_query_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
850 {
851 struct omapfb_plane_struct *plane = fbi->par;
852
853 *pi = plane->info;
854 return 0;
855 }
856
857 static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
858 {
859 struct omapfb_plane_struct *plane = fbi->par;
860 struct omapfb_device *fbdev = plane->fbdev;
861 struct omapfb_mem_region *rg = &fbdev->mem_desc.region[plane->idx];
862 size_t size;
863 int r = 0;
864
865 if (fbdev->ctrl->setup_mem == NULL)
866 return -ENODEV;
867 if (mi->type > OMAPFB_MEMTYPE_MAX)
868 return -EINVAL;
869
870 size = PAGE_ALIGN(mi->size);
871 omapfb_rqueue_lock(fbdev);
872 if (plane->info.enabled) {
873 r = -EBUSY;
874 goto out;
875 }
876 if (rg->size != size || rg->type != mi->type) {
877 struct fb_var_screeninfo *new_var = &fbdev->new_var;
878 unsigned long old_size = rg->size;
879 u8 old_type = rg->type;
880 unsigned long paddr;
881
882 rg->size = size;
883 rg->type = mi->type;
884 /*
885 * size == 0 is a special case, for which we
886 * don't check / adjust the screen parameters.
887 * This isn't a problem since the plane can't
888 * be reenabled unless its size is > 0.
889 */
890 if (old_size != size && size) {
891 if (size) {
892 memcpy(new_var, &fbi->var, sizeof(*new_var));
893 r = set_fb_var(fbi, new_var);
894 if (r < 0)
895 goto out;
896 }
897 }
898
899 if (fbdev->ctrl->sync)
900 fbdev->ctrl->sync();
901 r = fbdev->ctrl->setup_mem(plane->idx, size, mi->type, &paddr);
902 if (r < 0) {
903 /* Revert changes. */
904 rg->size = old_size;
905 rg->type = old_type;
906 goto out;
907 }
908 rg->paddr = paddr;
909
910 if (old_size != size) {
911 if (size) {
912 memcpy(&fbi->var, new_var, sizeof(fbi->var));
913 set_fb_fix(fbi, 0);
914 } else {
915 /*
916 * Set these explicitly to indicate that the
917 * plane memory is dealloce'd, the other
918 * screen parameters in var / fix are invalid.
919 */
920 mutex_lock(&fbi->mm_lock);
921 fbi->fix.smem_start = 0;
922 fbi->fix.smem_len = 0;
923 mutex_unlock(&fbi->mm_lock);
924 }
925 }
926 }
927 out:
928 omapfb_rqueue_unlock(fbdev);
929
930 return r;
931 }
932
933 static int omapfb_query_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
934 {
935 struct omapfb_plane_struct *plane = fbi->par;
936 struct omapfb_device *fbdev = plane->fbdev;
937 struct omapfb_mem_region *rg;
938
939 rg = &fbdev->mem_desc.region[plane->idx];
940 memset(mi, 0, sizeof(*mi));
941 mi->size = rg->size;
942 mi->type = rg->type;
943
944 return 0;
945 }
946
947 static int omapfb_set_color_key(struct omapfb_device *fbdev,
948 struct omapfb_color_key *ck)
949 {
950 int r;
951
952 if (!fbdev->ctrl->set_color_key)
953 return -ENODEV;
954
955 omapfb_rqueue_lock(fbdev);
956 r = fbdev->ctrl->set_color_key(ck);
957 omapfb_rqueue_unlock(fbdev);
958
959 return r;
960 }
961
962 static int omapfb_get_color_key(struct omapfb_device *fbdev,
963 struct omapfb_color_key *ck)
964 {
965 int r;
966
967 if (!fbdev->ctrl->get_color_key)
968 return -ENODEV;
969
970 omapfb_rqueue_lock(fbdev);
971 r = fbdev->ctrl->get_color_key(ck);
972 omapfb_rqueue_unlock(fbdev);
973
974 return r;
975 }
976
977 static struct blocking_notifier_head omapfb_client_list[OMAPFB_PLANE_NUM];
978 static int notifier_inited;
979
980 static void omapfb_init_notifier(void)
981 {
982 int i;
983
984 for (i = 0; i < OMAPFB_PLANE_NUM; i++)
985 BLOCKING_INIT_NOTIFIER_HEAD(&omapfb_client_list[i]);
986 }
987
988 int omapfb_register_client(struct omapfb_notifier_block *omapfb_nb,
989 omapfb_notifier_callback_t callback,
990 void *callback_data)
991 {
992 int r;
993
994 if ((unsigned)omapfb_nb->plane_idx > OMAPFB_PLANE_NUM)
995 return -EINVAL;
996
997 if (!notifier_inited) {
998 omapfb_init_notifier();
999 notifier_inited = 1;
1000 }
1001
1002 omapfb_nb->nb.notifier_call = (int (*)(struct notifier_block *,
1003 unsigned long, void *))callback;
1004 omapfb_nb->data = callback_data;
1005 r = blocking_notifier_chain_register(
1006 &omapfb_client_list[omapfb_nb->plane_idx],
1007 &omapfb_nb->nb);
1008 if (r)
1009 return r;
1010 if (omapfb_dev != NULL &&
1011 omapfb_dev->ctrl && omapfb_dev->ctrl->bind_client) {
1012 omapfb_dev->ctrl->bind_client(omapfb_nb);
1013 }
1014
1015 return 0;
1016 }
1017 EXPORT_SYMBOL(omapfb_register_client);
1018
1019 int omapfb_unregister_client(struct omapfb_notifier_block *omapfb_nb)
1020 {
1021 return blocking_notifier_chain_unregister(
1022 &omapfb_client_list[omapfb_nb->plane_idx], &omapfb_nb->nb);
1023 }
1024 EXPORT_SYMBOL(omapfb_unregister_client);
1025
1026 void omapfb_notify_clients(struct omapfb_device *fbdev, unsigned long event)
1027 {
1028 int i;
1029
1030 if (!notifier_inited)
1031 /* no client registered yet */
1032 return;
1033
1034 for (i = 0; i < OMAPFB_PLANE_NUM; i++)
1035 blocking_notifier_call_chain(&omapfb_client_list[i], event,
1036 fbdev->fb_info[i]);
1037 }
1038 EXPORT_SYMBOL(omapfb_notify_clients);
1039
1040 static int omapfb_set_update_mode(struct omapfb_device *fbdev,
1041 enum omapfb_update_mode mode)
1042 {
1043 int r;
1044
1045 omapfb_rqueue_lock(fbdev);
1046 r = fbdev->ctrl->set_update_mode(mode);
1047 omapfb_rqueue_unlock(fbdev);
1048
1049 return r;
1050 }
1051
1052 static enum omapfb_update_mode omapfb_get_update_mode(struct omapfb_device *fbdev)
1053 {
1054 int r;
1055
1056 omapfb_rqueue_lock(fbdev);
1057 r = fbdev->ctrl->get_update_mode();
1058 omapfb_rqueue_unlock(fbdev);
1059
1060 return r;
1061 }
1062
1063 static void omapfb_get_caps(struct omapfb_device *fbdev, int plane,
1064 struct omapfb_caps *caps)
1065 {
1066 memset(caps, 0, sizeof(*caps));
1067 fbdev->ctrl->get_caps(plane, caps);
1068 caps->ctrl |= fbdev->panel->get_caps(fbdev->panel);
1069 }
1070
1071 /* For lcd testing */
1072 void omapfb_write_first_pixel(struct omapfb_device *fbdev, u16 pixval)
1073 {
1074 omapfb_rqueue_lock(fbdev);
1075 *(u16 *)fbdev->mem_desc.region[0].vaddr = pixval;
1076 if (fbdev->ctrl->get_update_mode() == OMAPFB_MANUAL_UPDATE) {
1077 struct omapfb_update_window win;
1078
1079 memset(&win, 0, sizeof(win));
1080 win.width = 2;
1081 win.height = 2;
1082 win.out_width = 2;
1083 win.out_height = 2;
1084 fbdev->ctrl->update_window(fbdev->fb_info[0], &win, NULL, NULL);
1085 }
1086 omapfb_rqueue_unlock(fbdev);
1087 }
1088 EXPORT_SYMBOL(omapfb_write_first_pixel);
1089
1090 /*
1091 * Ioctl interface. Part of the kernel mode frame buffer API is duplicated
1092 * here to be accessible by user mode code.
1093 */
1094 static int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd,
1095 unsigned long arg)
1096 {
1097 struct omapfb_plane_struct *plane = fbi->par;
1098 struct omapfb_device *fbdev = plane->fbdev;
1099 struct fb_ops *ops = fbi->fbops;
1100 union {
1101 struct omapfb_update_window update_window;
1102 struct omapfb_plane_info plane_info;
1103 struct omapfb_mem_info mem_info;
1104 struct omapfb_color_key color_key;
1105 enum omapfb_update_mode update_mode;
1106 struct omapfb_caps caps;
1107 unsigned int mirror;
1108 int plane_out;
1109 int enable_plane;
1110 } p;
1111 int r = 0;
1112
1113 BUG_ON(!ops);
1114 switch (cmd) {
1115 case OMAPFB_MIRROR:
1116 if (get_user(p.mirror, (int __user *)arg))
1117 r = -EFAULT;
1118 else
1119 omapfb_mirror(fbi, p.mirror);
1120 break;
1121 case OMAPFB_SYNC_GFX:
1122 omapfb_sync(fbi);
1123 break;
1124 case OMAPFB_VSYNC:
1125 break;
1126 case OMAPFB_SET_UPDATE_MODE:
1127 if (get_user(p.update_mode, (int __user *)arg))
1128 r = -EFAULT;
1129 else
1130 r = omapfb_set_update_mode(fbdev, p.update_mode);
1131 break;
1132 case OMAPFB_GET_UPDATE_MODE:
1133 p.update_mode = omapfb_get_update_mode(fbdev);
1134 if (put_user(p.update_mode,
1135 (enum omapfb_update_mode __user *)arg))
1136 r = -EFAULT;
1137 break;
1138 case OMAPFB_UPDATE_WINDOW_OLD:
1139 if (copy_from_user(&p.update_window, (void __user *)arg,
1140 sizeof(struct omapfb_update_window_old)))
1141 r = -EFAULT;
1142 else {
1143 struct omapfb_update_window *u = &p.update_window;
1144 u->out_x = u->x;
1145 u->out_y = u->y;
1146 u->out_width = u->width;
1147 u->out_height = u->height;
1148 memset(u->reserved, 0, sizeof(u->reserved));
1149 r = omapfb_update_win(fbi, u);
1150 }
1151 break;
1152 case OMAPFB_UPDATE_WINDOW:
1153 if (copy_from_user(&p.update_window, (void __user *)arg,
1154 sizeof(p.update_window)))
1155 r = -EFAULT;
1156 else
1157 r = omapfb_update_win(fbi, &p.update_window);
1158 break;
1159 case OMAPFB_SETUP_PLANE:
1160 if (copy_from_user(&p.plane_info, (void __user *)arg,
1161 sizeof(p.plane_info)))
1162 r = -EFAULT;
1163 else
1164 r = omapfb_setup_plane(fbi, &p.plane_info);
1165 break;
1166 case OMAPFB_QUERY_PLANE:
1167 if ((r = omapfb_query_plane(fbi, &p.plane_info)) < 0)
1168 break;
1169 if (copy_to_user((void __user *)arg, &p.plane_info,
1170 sizeof(p.plane_info)))
1171 r = -EFAULT;
1172 break;
1173 case OMAPFB_SETUP_MEM:
1174 if (copy_from_user(&p.mem_info, (void __user *)arg,
1175 sizeof(p.mem_info)))
1176 r = -EFAULT;
1177 else
1178 r = omapfb_setup_mem(fbi, &p.mem_info);
1179 break;
1180 case OMAPFB_QUERY_MEM:
1181 if ((r = omapfb_query_mem(fbi, &p.mem_info)) < 0)
1182 break;
1183 if (copy_to_user((void __user *)arg, &p.mem_info,
1184 sizeof(p.mem_info)))
1185 r = -EFAULT;
1186 break;
1187 case OMAPFB_SET_COLOR_KEY:
1188 if (copy_from_user(&p.color_key, (void __user *)arg,
1189 sizeof(p.color_key)))
1190 r = -EFAULT;
1191 else
1192 r = omapfb_set_color_key(fbdev, &p.color_key);
1193 break;
1194 case OMAPFB_GET_COLOR_KEY:
1195 if ((r = omapfb_get_color_key(fbdev, &p.color_key)) < 0)
1196 break;
1197 if (copy_to_user((void __user *)arg, &p.color_key,
1198 sizeof(p.color_key)))
1199 r = -EFAULT;
1200 break;
1201 case OMAPFB_GET_CAPS:
1202 omapfb_get_caps(fbdev, plane->idx, &p.caps);
1203 if (copy_to_user((void __user *)arg, &p.caps, sizeof(p.caps)))
1204 r = -EFAULT;
1205 break;
1206 case OMAPFB_LCD_TEST:
1207 {
1208 int test_num;
1209
1210 if (get_user(test_num, (int __user *)arg)) {
1211 r = -EFAULT;
1212 break;
1213 }
1214 if (!fbdev->panel->run_test) {
1215 r = -EINVAL;
1216 break;
1217 }
1218 r = fbdev->panel->run_test(fbdev->panel, test_num);
1219 break;
1220 }
1221 case OMAPFB_CTRL_TEST:
1222 {
1223 int test_num;
1224
1225 if (get_user(test_num, (int __user *)arg)) {
1226 r = -EFAULT;
1227 break;
1228 }
1229 if (!fbdev->ctrl->run_test) {
1230 r = -EINVAL;
1231 break;
1232 }
1233 r = fbdev->ctrl->run_test(test_num);
1234 break;
1235 }
1236 default:
1237 r = -EINVAL;
1238 }
1239
1240 return r;
1241 }
1242
1243 static int omapfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
1244 {
1245 struct omapfb_plane_struct *plane = info->par;
1246 struct omapfb_device *fbdev = plane->fbdev;
1247 int r;
1248
1249 omapfb_rqueue_lock(fbdev);
1250 r = fbdev->ctrl->mmap(info, vma);
1251 omapfb_rqueue_unlock(fbdev);
1252
1253 return r;
1254 }
1255
1256 /*
1257 * Callback table for the frame buffer framework. Some of these pointers
1258 * will be changed according to the current setting of fb_info->accel_flags.
1259 */
1260 static struct fb_ops omapfb_ops = {
1261 .owner = THIS_MODULE,
1262 .fb_open = omapfb_open,
1263 .fb_release = omapfb_release,
1264 .fb_setcolreg = omapfb_setcolreg,
1265 .fb_setcmap = omapfb_setcmap,
1266 .fb_fillrect = cfb_fillrect,
1267 .fb_copyarea = cfb_copyarea,
1268 .fb_imageblit = cfb_imageblit,
1269 .fb_blank = omapfb_blank,
1270 .fb_ioctl = omapfb_ioctl,
1271 .fb_check_var = omapfb_check_var,
1272 .fb_set_par = omapfb_set_par,
1273 .fb_rotate = omapfb_rotate,
1274 .fb_pan_display = omapfb_pan_display,
1275 };
1276
1277 /*
1278 * ---------------------------------------------------------------------------
1279 * Sysfs interface
1280 * ---------------------------------------------------------------------------
1281 */
1282 /* omapfbX sysfs entries */
1283 static ssize_t omapfb_show_caps_num(struct device *dev,
1284 struct device_attribute *attr, char *buf)
1285 {
1286 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1287 int plane;
1288 size_t size;
1289 struct omapfb_caps caps;
1290
1291 plane = 0;
1292 size = 0;
1293 while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1294 omapfb_get_caps(fbdev, plane, &caps);
1295 size += snprintf(&buf[size], PAGE_SIZE - size,
1296 "plane#%d %#010x %#010x %#010x\n",
1297 plane, caps.ctrl, caps.plane_color, caps.wnd_color);
1298 plane++;
1299 }
1300 return size;
1301 }
1302
1303 static ssize_t omapfb_show_caps_text(struct device *dev,
1304 struct device_attribute *attr, char *buf)
1305 {
1306 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1307 int i;
1308 struct omapfb_caps caps;
1309 int plane;
1310 size_t size;
1311
1312 plane = 0;
1313 size = 0;
1314 while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1315 omapfb_get_caps(fbdev, plane, &caps);
1316 size += snprintf(&buf[size], PAGE_SIZE - size,
1317 "plane#%d:\n", plane);
1318 for (i = 0; i < ARRAY_SIZE(ctrl_caps) &&
1319 size < PAGE_SIZE; i++) {
1320 if (ctrl_caps[i].flag & caps.ctrl)
1321 size += snprintf(&buf[size], PAGE_SIZE - size,
1322 " %s\n", ctrl_caps[i].name);
1323 }
1324 size += snprintf(&buf[size], PAGE_SIZE - size,
1325 " plane colors:\n");
1326 for (i = 0; i < ARRAY_SIZE(color_caps) &&
1327 size < PAGE_SIZE; i++) {
1328 if (color_caps[i].flag & caps.plane_color)
1329 size += snprintf(&buf[size], PAGE_SIZE - size,
1330 " %s\n", color_caps[i].name);
1331 }
1332 size += snprintf(&buf[size], PAGE_SIZE - size,
1333 " window colors:\n");
1334 for (i = 0; i < ARRAY_SIZE(color_caps) &&
1335 size < PAGE_SIZE; i++) {
1336 if (color_caps[i].flag & caps.wnd_color)
1337 size += snprintf(&buf[size], PAGE_SIZE - size,
1338 " %s\n", color_caps[i].name);
1339 }
1340
1341 plane++;
1342 }
1343 return size;
1344 }
1345
1346 static DEVICE_ATTR(caps_num, 0444, omapfb_show_caps_num, NULL);
1347 static DEVICE_ATTR(caps_text, 0444, omapfb_show_caps_text, NULL);
1348
1349 /* panel sysfs entries */
1350 static ssize_t omapfb_show_panel_name(struct device *dev,
1351 struct device_attribute *attr, char *buf)
1352 {
1353 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1354
1355 return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->panel->name);
1356 }
1357
1358 static ssize_t omapfb_show_bklight_level(struct device *dev,
1359 struct device_attribute *attr,
1360 char *buf)
1361 {
1362 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1363 int r;
1364
1365 if (fbdev->panel->get_bklight_level) {
1366 r = snprintf(buf, PAGE_SIZE, "%d\n",
1367 fbdev->panel->get_bklight_level(fbdev->panel));
1368 } else
1369 r = -ENODEV;
1370 return r;
1371 }
1372
1373 static ssize_t omapfb_store_bklight_level(struct device *dev,
1374 struct device_attribute *attr,
1375 const char *buf, size_t size)
1376 {
1377 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1378 int r;
1379
1380 if (fbdev->panel->set_bklight_level) {
1381 unsigned int level;
1382
1383 if (sscanf(buf, "%10d", &level) == 1) {
1384 r = fbdev->panel->set_bklight_level(fbdev->panel,
1385 level);
1386 } else
1387 r = -EINVAL;
1388 } else
1389 r = -ENODEV;
1390 return r ? r : size;
1391 }
1392
1393 static ssize_t omapfb_show_bklight_max(struct device *dev,
1394 struct device_attribute *attr, char *buf)
1395 {
1396 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1397 int r;
1398
1399 if (fbdev->panel->get_bklight_level) {
1400 r = snprintf(buf, PAGE_SIZE, "%d\n",
1401 fbdev->panel->get_bklight_max(fbdev->panel));
1402 } else
1403 r = -ENODEV;
1404 return r;
1405 }
1406
1407 static struct device_attribute dev_attr_panel_name =
1408 __ATTR(name, 0444, omapfb_show_panel_name, NULL);
1409 static DEVICE_ATTR(backlight_level, 0664,
1410 omapfb_show_bklight_level, omapfb_store_bklight_level);
1411 static DEVICE_ATTR(backlight_max, 0444, omapfb_show_bklight_max, NULL);
1412
1413 static struct attribute *panel_attrs[] = {
1414 &dev_attr_panel_name.attr,
1415 &dev_attr_backlight_level.attr,
1416 &dev_attr_backlight_max.attr,
1417 NULL,
1418 };
1419
1420 static struct attribute_group panel_attr_grp = {
1421 .name = "panel",
1422 .attrs = panel_attrs,
1423 };
1424
1425 /* ctrl sysfs entries */
1426 static ssize_t omapfb_show_ctrl_name(struct device *dev,
1427 struct device_attribute *attr, char *buf)
1428 {
1429 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1430
1431 return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->ctrl->name);
1432 }
1433
1434 static struct device_attribute dev_attr_ctrl_name =
1435 __ATTR(name, 0444, omapfb_show_ctrl_name, NULL);
1436
1437 static struct attribute *ctrl_attrs[] = {
1438 &dev_attr_ctrl_name.attr,
1439 NULL,
1440 };
1441
1442 static struct attribute_group ctrl_attr_grp = {
1443 .name = "ctrl",
1444 .attrs = ctrl_attrs,
1445 };
1446
1447 static int omapfb_register_sysfs(struct omapfb_device *fbdev)
1448 {
1449 int r;
1450
1451 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_num)))
1452 goto fail0;
1453
1454 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_text)))
1455 goto fail1;
1456
1457 if ((r = sysfs_create_group(&fbdev->dev->kobj, &panel_attr_grp)))
1458 goto fail2;
1459
1460 if ((r = sysfs_create_group(&fbdev->dev->kobj, &ctrl_attr_grp)))
1461 goto fail3;
1462
1463 return 0;
1464 fail3:
1465 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1466 fail2:
1467 device_remove_file(fbdev->dev, &dev_attr_caps_text);
1468 fail1:
1469 device_remove_file(fbdev->dev, &dev_attr_caps_num);
1470 fail0:
1471 dev_err(fbdev->dev, "unable to register sysfs interface\n");
1472 return r;
1473 }
1474
1475 static void omapfb_unregister_sysfs(struct omapfb_device *fbdev)
1476 {
1477 sysfs_remove_group(&fbdev->dev->kobj, &ctrl_attr_grp);
1478 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1479 device_remove_file(fbdev->dev, &dev_attr_caps_num);
1480 device_remove_file(fbdev->dev, &dev_attr_caps_text);
1481 }
1482
1483 /*
1484 * ---------------------------------------------------------------------------
1485 * LDM callbacks
1486 * ---------------------------------------------------------------------------
1487 */
1488 /* Initialize system fb_info object and set the default video mode.
1489 * The frame buffer memory already allocated by lcddma_init
1490 */
1491 static int fbinfo_init(struct omapfb_device *fbdev, struct fb_info *info)
1492 {
1493 struct fb_var_screeninfo *var = &info->var;
1494 struct fb_fix_screeninfo *fix = &info->fix;
1495 int r = 0;
1496
1497 info->fbops = &omapfb_ops;
1498 info->flags = FBINFO_FLAG_DEFAULT;
1499
1500 strncpy(fix->id, MODULE_NAME, sizeof(fix->id));
1501
1502 info->pseudo_palette = fbdev->pseudo_palette;
1503
1504 var->accel_flags = def_accel ? FB_ACCELF_TEXT : 0;
1505 var->xres = def_vxres;
1506 var->yres = def_vyres;
1507 var->xres_virtual = def_vxres;
1508 var->yres_virtual = def_vyres;
1509 var->rotate = def_rotate;
1510 var->bits_per_pixel = fbdev->panel->bpp;
1511
1512 set_fb_var(info, var);
1513 set_fb_fix(info, 1);
1514
1515 r = fb_alloc_cmap(&info->cmap, 16, 0);
1516 if (r != 0)
1517 dev_err(fbdev->dev, "unable to allocate color map memory\n");
1518
1519 return r;
1520 }
1521
1522 /* Release the fb_info object */
1523 static void fbinfo_cleanup(struct omapfb_device *fbdev, struct fb_info *fbi)
1524 {
1525 fb_dealloc_cmap(&fbi->cmap);
1526 }
1527
1528 static void planes_cleanup(struct omapfb_device *fbdev)
1529 {
1530 int i;
1531
1532 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1533 if (fbdev->fb_info[i] == NULL)
1534 break;
1535 fbinfo_cleanup(fbdev, fbdev->fb_info[i]);
1536 framebuffer_release(fbdev->fb_info[i]);
1537 }
1538 }
1539
1540 static int planes_init(struct omapfb_device *fbdev)
1541 {
1542 struct fb_info *fbi;
1543 int i;
1544 int r;
1545
1546 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1547 struct omapfb_plane_struct *plane;
1548 fbi = framebuffer_alloc(sizeof(struct omapfb_plane_struct),
1549 fbdev->dev);
1550 if (fbi == NULL) {
1551 dev_err(fbdev->dev,
1552 "unable to allocate memory for plane info\n");
1553 planes_cleanup(fbdev);
1554 return -ENOMEM;
1555 }
1556 plane = fbi->par;
1557 plane->idx = i;
1558 plane->fbdev = fbdev;
1559 plane->info.mirror = def_mirror;
1560 fbdev->fb_info[i] = fbi;
1561
1562 if ((r = fbinfo_init(fbdev, fbi)) < 0) {
1563 framebuffer_release(fbi);
1564 planes_cleanup(fbdev);
1565 return r;
1566 }
1567 plane->info.out_width = fbi->var.xres;
1568 plane->info.out_height = fbi->var.yres;
1569 }
1570 return 0;
1571 }
1572
1573 /*
1574 * Free driver resources. Can be called to rollback an aborted initialization
1575 * sequence.
1576 */
1577 static void omapfb_free_resources(struct omapfb_device *fbdev, int state)
1578 {
1579 int i;
1580
1581 switch (state) {
1582 case OMAPFB_ACTIVE:
1583 for (i = 0; i < fbdev->mem_desc.region_cnt; i++)
1584 unregister_framebuffer(fbdev->fb_info[i]);
1585 case 7:
1586 omapfb_unregister_sysfs(fbdev);
1587 case 6:
1588 fbdev->panel->disable(fbdev->panel);
1589 case 5:
1590 omapfb_set_update_mode(fbdev, OMAPFB_UPDATE_DISABLED);
1591 case 4:
1592 planes_cleanup(fbdev);
1593 case 3:
1594 ctrl_cleanup(fbdev);
1595 case 2:
1596 fbdev->panel->cleanup(fbdev->panel);
1597 case 1:
1598 dev_set_drvdata(fbdev->dev, NULL);
1599 kfree(fbdev);
1600 case 0:
1601 /* nothing to free */
1602 break;
1603 default:
1604 BUG();
1605 }
1606 }
1607
1608 static int omapfb_find_ctrl(struct omapfb_device *fbdev)
1609 {
1610 struct omapfb_platform_data *conf;
1611 char name[17];
1612 int i;
1613
1614 conf = fbdev->dev->platform_data;
1615
1616 fbdev->ctrl = NULL;
1617
1618 strncpy(name, conf->lcd.ctrl_name, sizeof(name) - 1);
1619 name[sizeof(name) - 1] = '\0';
1620
1621 if (strcmp(name, "internal") == 0) {
1622 fbdev->ctrl = fbdev->int_ctrl;
1623 return 0;
1624 }
1625
1626 for (i = 0; i < ARRAY_SIZE(ctrls); i++) {
1627 dev_dbg(fbdev->dev, "ctrl %s\n", ctrls[i]->name);
1628 if (strcmp(ctrls[i]->name, name) == 0) {
1629 fbdev->ctrl = ctrls[i];
1630 break;
1631 }
1632 }
1633
1634 if (fbdev->ctrl == NULL) {
1635 dev_dbg(fbdev->dev, "ctrl %s not supported\n", name);
1636 return -1;
1637 }
1638
1639 return 0;
1640 }
1641
1642 static void check_required_callbacks(struct omapfb_device *fbdev)
1643 {
1644 #define _C(x) (fbdev->ctrl->x != NULL)
1645 #define _P(x) (fbdev->panel->x != NULL)
1646 BUG_ON(fbdev->ctrl == NULL || fbdev->panel == NULL);
1647 BUG_ON(!(_C(init) && _C(cleanup) && _C(get_caps) &&
1648 _C(set_update_mode) && _C(setup_plane) && _C(enable_plane) &&
1649 _P(init) && _P(cleanup) && _P(enable) && _P(disable) &&
1650 _P(get_caps)));
1651 #undef _P
1652 #undef _C
1653 }
1654
1655 /*
1656 * Called by LDM binding to probe and attach a new device.
1657 * Initialization sequence:
1658 * 1. allocate system omapfb_device structure
1659 * 2. select controller type according to platform configuration
1660 * init LCD panel
1661 * 3. init LCD controller and LCD DMA
1662 * 4. init system fb_info structure for all planes
1663 * 5. setup video mode for first plane and enable it
1664 * 6. enable LCD panel
1665 * 7. register sysfs attributes
1666 * OMAPFB_ACTIVE: register system fb_info structure for all planes
1667 */
1668 static int omapfb_do_probe(struct platform_device *pdev,
1669 struct lcd_panel *panel)
1670 {
1671 struct omapfb_device *fbdev = NULL;
1672 int init_state;
1673 unsigned long phz, hhz, vhz;
1674 unsigned long vram;
1675 int i;
1676 int r = 0;
1677
1678 init_state = 0;
1679
1680 if (pdev->num_resources != 0) {
1681 dev_err(&pdev->dev, "probed for an unknown device\n");
1682 r = -ENODEV;
1683 goto cleanup;
1684 }
1685
1686 if (pdev->dev.platform_data == NULL) {
1687 dev_err(&pdev->dev, "missing platform data\n");
1688 r = -ENOENT;
1689 goto cleanup;
1690 }
1691
1692 fbdev = kzalloc(sizeof(struct omapfb_device), GFP_KERNEL);
1693 if (fbdev == NULL) {
1694 dev_err(&pdev->dev,
1695 "unable to allocate memory for device info\n");
1696 r = -ENOMEM;
1697 goto cleanup;
1698 }
1699 init_state++;
1700
1701 fbdev->dev = &pdev->dev;
1702 fbdev->panel = panel;
1703 platform_set_drvdata(pdev, fbdev);
1704
1705 mutex_init(&fbdev->rqueue_mutex);
1706
1707 #ifdef CONFIG_ARCH_OMAP1
1708 fbdev->int_ctrl = &omap1_int_ctrl;
1709 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
1710 fbdev->ext_if = &omap1_ext_if;
1711 #endif
1712 #else /* OMAP2 */
1713 fbdev->int_ctrl = &omap2_int_ctrl;
1714 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
1715 fbdev->ext_if = &omap2_ext_if;
1716 #endif
1717 #endif
1718 if (omapfb_find_ctrl(fbdev) < 0) {
1719 dev_err(fbdev->dev,
1720 "LCD controller not found, board not supported\n");
1721 r = -ENODEV;
1722 goto cleanup;
1723 }
1724
1725 r = fbdev->panel->init(fbdev->panel, fbdev);
1726 if (r)
1727 goto cleanup;
1728
1729 pr_info("omapfb: configured for panel %s\n", fbdev->panel->name);
1730
1731 def_vxres = def_vxres ? def_vxres : fbdev->panel->x_res;
1732 def_vyres = def_vyres ? def_vyres : fbdev->panel->y_res;
1733
1734 init_state++;
1735
1736 r = ctrl_init(fbdev);
1737 if (r)
1738 goto cleanup;
1739 if (fbdev->ctrl->mmap != NULL)
1740 omapfb_ops.fb_mmap = omapfb_mmap;
1741 init_state++;
1742
1743 check_required_callbacks(fbdev);
1744
1745 r = planes_init(fbdev);
1746 if (r)
1747 goto cleanup;
1748 init_state++;
1749
1750 #ifdef CONFIG_FB_OMAP_DMA_TUNE
1751 /* Set DMA priority for EMIFF access to highest */
1752 if (cpu_class_is_omap1())
1753 omap_set_dma_priority(0, OMAP_DMA_PORT_EMIFF, 15);
1754 #endif
1755
1756 r = ctrl_change_mode(fbdev->fb_info[0]);
1757 if (r) {
1758 dev_err(fbdev->dev, "mode setting failed\n");
1759 goto cleanup;
1760 }
1761
1762 /* GFX plane is enabled by default */
1763 r = fbdev->ctrl->enable_plane(OMAPFB_PLANE_GFX, 1);
1764 if (r)
1765 goto cleanup;
1766
1767 omapfb_set_update_mode(fbdev, manual_update ?
1768 OMAPFB_MANUAL_UPDATE : OMAPFB_AUTO_UPDATE);
1769 init_state++;
1770
1771 r = fbdev->panel->enable(fbdev->panel);
1772 if (r)
1773 goto cleanup;
1774 init_state++;
1775
1776 r = omapfb_register_sysfs(fbdev);
1777 if (r)
1778 goto cleanup;
1779 init_state++;
1780
1781 vram = 0;
1782 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1783 r = register_framebuffer(fbdev->fb_info[i]);
1784 if (r != 0) {
1785 dev_err(fbdev->dev,
1786 "registering framebuffer %d failed\n", i);
1787 goto cleanup;
1788 }
1789 vram += fbdev->mem_desc.region[i].size;
1790 }
1791
1792 fbdev->state = OMAPFB_ACTIVE;
1793
1794 panel = fbdev->panel;
1795 phz = panel->pixel_clock * 1000;
1796 hhz = phz * 10 / (panel->hfp + panel->x_res + panel->hbp + panel->hsw);
1797 vhz = hhz / (panel->vfp + panel->y_res + panel->vbp + panel->vsw);
1798
1799 omapfb_dev = fbdev;
1800
1801 pr_info("omapfb: Framebuffer initialized. Total vram %lu planes %d\n",
1802 vram, fbdev->mem_desc.region_cnt);
1803 pr_info("omapfb: Pixclock %lu kHz hfreq %lu.%lu kHz "
1804 "vfreq %lu.%lu Hz\n",
1805 phz / 1000, hhz / 10000, hhz % 10, vhz / 10, vhz % 10);
1806
1807 return 0;
1808
1809 cleanup:
1810 omapfb_free_resources(fbdev, init_state);
1811
1812 return r;
1813 }
1814
1815 static int omapfb_probe(struct platform_device *pdev)
1816 {
1817 BUG_ON(fbdev_pdev != NULL);
1818
1819 /* Delay actual initialization until the LCD is registered */
1820 fbdev_pdev = pdev;
1821 if (fbdev_panel != NULL)
1822 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1823 return 0;
1824 }
1825
1826 void omapfb_register_panel(struct lcd_panel *panel)
1827 {
1828 BUG_ON(fbdev_panel != NULL);
1829
1830 fbdev_panel = panel;
1831 if (fbdev_pdev != NULL)
1832 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1833 }
1834
1835 /* Called when the device is being detached from the driver */
1836 static int omapfb_remove(struct platform_device *pdev)
1837 {
1838 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1839 enum omapfb_state saved_state = fbdev->state;
1840
1841 /* FIXME: wait till completion of pending events */
1842
1843 fbdev->state = OMAPFB_DISABLED;
1844 omapfb_free_resources(fbdev, saved_state);
1845
1846 return 0;
1847 }
1848
1849 /* PM suspend */
1850 static int omapfb_suspend(struct platform_device *pdev, pm_message_t mesg)
1851 {
1852 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1853
1854 if (fbdev != NULL)
1855 omapfb_blank(FB_BLANK_POWERDOWN, fbdev->fb_info[0]);
1856 return 0;
1857 }
1858
1859 /* PM resume */
1860 static int omapfb_resume(struct platform_device *pdev)
1861 {
1862 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1863
1864 if (fbdev != NULL)
1865 omapfb_blank(FB_BLANK_UNBLANK, fbdev->fb_info[0]);
1866 return 0;
1867 }
1868
1869 static struct platform_driver omapfb_driver = {
1870 .probe = omapfb_probe,
1871 .remove = omapfb_remove,
1872 .suspend = omapfb_suspend,
1873 .resume = omapfb_resume,
1874 .driver = {
1875 .name = MODULE_NAME,
1876 .owner = THIS_MODULE,
1877 },
1878 };
1879
1880 #ifndef MODULE
1881
1882 /* Process kernel command line parameters */
1883 static int __init omapfb_setup(char *options)
1884 {
1885 char *this_opt = NULL;
1886 int r = 0;
1887
1888 pr_debug("omapfb: options %s\n", options);
1889
1890 if (!options || !*options)
1891 return 0;
1892
1893 while (!r && (this_opt = strsep(&options, ",")) != NULL) {
1894 if (!strncmp(this_opt, "accel", 5))
1895 def_accel = 1;
1896 else if (!strncmp(this_opt, "vram:", 5)) {
1897 char *suffix;
1898 unsigned long vram;
1899 vram = (simple_strtoul(this_opt + 5, &suffix, 0));
1900 switch (suffix[0]) {
1901 case '\0':
1902 break;
1903 case 'm':
1904 case 'M':
1905 vram *= 1024;
1906 /* Fall through */
1907 case 'k':
1908 case 'K':
1909 vram *= 1024;
1910 break;
1911 default:
1912 pr_debug("omapfb: invalid vram suffix %c\n",
1913 suffix[0]);
1914 r = -1;
1915 }
1916 def_vram[def_vram_cnt++] = vram;
1917 }
1918 else if (!strncmp(this_opt, "vxres:", 6))
1919 def_vxres = simple_strtoul(this_opt + 6, NULL, 0);
1920 else if (!strncmp(this_opt, "vyres:", 6))
1921 def_vyres = simple_strtoul(this_opt + 6, NULL, 0);
1922 else if (!strncmp(this_opt, "rotate:", 7))
1923 def_rotate = (simple_strtoul(this_opt + 7, NULL, 0));
1924 else if (!strncmp(this_opt, "mirror:", 7))
1925 def_mirror = (simple_strtoul(this_opt + 7, NULL, 0));
1926 else if (!strncmp(this_opt, "manual_update", 13))
1927 manual_update = 1;
1928 else {
1929 pr_debug("omapfb: invalid option\n");
1930 r = -1;
1931 }
1932 }
1933
1934 return r;
1935 }
1936
1937 #endif
1938
1939 /* Register both the driver and the device */
1940 static int __init omapfb_init(void)
1941 {
1942 #ifndef MODULE
1943 char *option;
1944
1945 if (fb_get_options("omapfb", &option))
1946 return -ENODEV;
1947 omapfb_setup(option);
1948 #endif
1949 /* Register the driver with LDM */
1950 if (platform_driver_register(&omapfb_driver)) {
1951 pr_debug("failed to register omapfb driver\n");
1952 return -ENODEV;
1953 }
1954
1955 return 0;
1956 }
1957
1958 static void __exit omapfb_cleanup(void)
1959 {
1960 platform_driver_unregister(&omapfb_driver);
1961 }
1962
1963 module_param_named(accel, def_accel, uint, 0664);
1964 module_param_array_named(vram, def_vram, ulong, &def_vram_cnt, 0664);
1965 module_param_named(vxres, def_vxres, long, 0664);
1966 module_param_named(vyres, def_vyres, long, 0664);
1967 module_param_named(rotate, def_rotate, uint, 0664);
1968 module_param_named(mirror, def_mirror, uint, 0664);
1969 module_param_named(manual_update, manual_update, bool, 0664);
1970
1971 module_init(omapfb_init);
1972 module_exit(omapfb_cleanup);
1973
1974 MODULE_DESCRIPTION("TI OMAP framebuffer driver");
1975 MODULE_AUTHOR("Imre Deak <imre.deak@nokia.com>");
1976 MODULE_LICENSE("GPL");
Linux for Ginger Game Console