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added 2.6.29.6 aldebaran kernel
[nao-ulib.git] / kernel / 2.6.29.6-aldebaran-rt / drivers / video / omap / omapfb_main.c
blob1a49519dafa483b864c992dfb1f92b2f8e02505f
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 <mach/dma.h>
32 #include <mach/omapfb.h>
33
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_SET_BACKLIGHT, "backlight setting" },
71 };
72
73 static struct caps_table_struct color_caps[] = {
74 { 1 << OMAPFB_COLOR_RGB565, "RGB565", },
75 { 1 << OMAPFB_COLOR_YUV422, "YUV422", },
76 { 1 << OMAPFB_COLOR_YUV420, "YUV420", },
77 { 1 << OMAPFB_COLOR_CLUT_8BPP, "CLUT8", },
78 { 1 << OMAPFB_COLOR_CLUT_4BPP, "CLUT4", },
79 { 1 << OMAPFB_COLOR_CLUT_2BPP, "CLUT2", },
80 { 1 << OMAPFB_COLOR_CLUT_1BPP, "CLUT1", },
81 { 1 << OMAPFB_COLOR_RGB444, "RGB444", },
82 { 1 << OMAPFB_COLOR_YUY422, "YUY422", },
83 };
84
85 /*
86 * ---------------------------------------------------------------------------
87 * LCD panel
88 * ---------------------------------------------------------------------------
89 */
90 extern struct lcd_ctrl hwa742_ctrl;
91 extern struct lcd_ctrl blizzard_ctrl;
92
93 static const struct lcd_ctrl *ctrls[] = {
94 #ifdef CONFIG_ARCH_OMAP1
95 &omap1_int_ctrl,
96 #else
97 &omap2_int_ctrl,
98 #endif
99
100 #ifdef CONFIG_FB_OMAP_LCDC_HWA742
101 &hwa742_ctrl,
102 #endif
103 #ifdef CONFIG_FB_OMAP_LCDC_BLIZZARD
104 &blizzard_ctrl,
105 #endif
106 };
107
108 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
109 #ifdef CONFIG_ARCH_OMAP1
110 extern struct lcd_ctrl_extif omap1_ext_if;
111 #else
112 extern struct lcd_ctrl_extif omap2_ext_if;
113 #endif
114 #endif
115
116 static void omapfb_rqueue_lock(struct omapfb_device *fbdev)
117 {
118 mutex_lock(&fbdev->rqueue_mutex);
119 }
120
121 static void omapfb_rqueue_unlock(struct omapfb_device *fbdev)
122 {
123 mutex_unlock(&fbdev->rqueue_mutex);
124 }
125
126 /*
127 * ---------------------------------------------------------------------------
128 * LCD controller and LCD DMA
129 * ---------------------------------------------------------------------------
130 */
131 /* Lookup table to map elem size to elem type. */
132 static const int dma_elem_type[] = {
133 0,
134 OMAP_DMA_DATA_TYPE_S8,
135 OMAP_DMA_DATA_TYPE_S16,
136 0,
137 OMAP_DMA_DATA_TYPE_S32,
138 };
139
140 /*
141 * Allocate resources needed for LCD controller and LCD DMA operations. Video
142 * memory is allocated from system memory according to the virtual display
143 * size, except if a bigger memory size is specified explicitly as a kernel
144 * parameter.
145 */
146 static int ctrl_init(struct omapfb_device *fbdev)
147 {
148 int r;
149 int i;
150
151 /* kernel/module vram parameters override boot tags/board config */
152 if (def_vram_cnt) {
153 for (i = 0; i < def_vram_cnt; i++)
154 fbdev->mem_desc.region[i].size =
155 PAGE_ALIGN(def_vram[i]);
156 fbdev->mem_desc.region_cnt = i;
157 } else {
158 struct omapfb_platform_data *conf;
159
160 conf = fbdev->dev->platform_data;
161 fbdev->mem_desc = conf->mem_desc;
162 }
163
164 if (!fbdev->mem_desc.region_cnt) {
165 struct lcd_panel *panel = fbdev->panel;
166 int def_size;
167 int bpp = panel->bpp;
168
169 /* 12 bpp is packed in 16 bits */
170 if (bpp == 12)
171 bpp = 16;
172 def_size = def_vxres * def_vyres * bpp / 8;
173 fbdev->mem_desc.region_cnt = 1;
174 fbdev->mem_desc.region[0].size = PAGE_ALIGN(def_size);
175 }
176 r = fbdev->ctrl->init(fbdev, 0, &fbdev->mem_desc);
177 if (r < 0) {
178 dev_err(fbdev->dev, "controller initialization failed (%d)\n",
179 r);
180 return r;
181 }
182
183 #ifdef DEBUG
184 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
185 dev_dbg(fbdev->dev, "region%d phys %08x virt %p size=%lu\n",
186 i,
187 fbdev->mem_desc.region[i].paddr,
188 fbdev->mem_desc.region[i].vaddr,
189 fbdev->mem_desc.region[i].size);
190 }
191 #endif
192 return 0;
193 }
194
195 static void ctrl_cleanup(struct omapfb_device *fbdev)
196 {
197 fbdev->ctrl->cleanup();
198 }
199
200 /* Must be called with fbdev->rqueue_mutex held. */
201 static int ctrl_change_mode(struct fb_info *fbi)
202 {
203 int r;
204 unsigned long offset;
205 struct omapfb_plane_struct *plane = fbi->par;
206 struct omapfb_device *fbdev = plane->fbdev;
207 struct fb_var_screeninfo *var = &fbi->var;
208
209 offset = var->yoffset * fbi->fix.line_length +
210 var->xoffset * var->bits_per_pixel / 8;
211
212 if (fbdev->ctrl->sync)
213 fbdev->ctrl->sync();
214 r = fbdev->ctrl->setup_plane(plane->idx, plane->info.channel_out,
215 offset, var->xres_virtual,
216 plane->info.pos_x, plane->info.pos_y,
217 var->xres, var->yres, plane->color_mode);
218 if (fbdev->ctrl->set_scale != NULL)
219 r = fbdev->ctrl->set_scale(plane->idx,
220 var->xres, var->yres,
221 plane->info.out_width,
222 plane->info.out_height);
223
224 return r;
225 }
226
227 /*
228 * ---------------------------------------------------------------------------
229 * fbdev framework callbacks and the ioctl interface
230 * ---------------------------------------------------------------------------
231 */
232 /* Called each time the omapfb device is opened */
233 static int omapfb_open(struct fb_info *info, int user)
234 {
235 return 0;
236 }
237
238 static void omapfb_sync(struct fb_info *info);
239
240 /* Called when the omapfb device is closed. We make sure that any pending
241 * gfx DMA operations are ended, before we return. */
242 static int omapfb_release(struct fb_info *info, int user)
243 {
244 omapfb_sync(info);
245 return 0;
246 }
247
248 /* Store a single color palette entry into a pseudo palette or the hardware
249 * palette if one is available. For now we support only 16bpp and thus store
250 * the entry only to the pseudo palette.
251 */
252 static int _setcolreg(struct fb_info *info, u_int regno, u_int red, u_int green,
253 u_int blue, u_int transp, int update_hw_pal)
254 {
255 struct omapfb_plane_struct *plane = info->par;
256 struct omapfb_device *fbdev = plane->fbdev;
257 struct fb_var_screeninfo *var = &info->var;
258 int r = 0;
259
260 switch (plane->color_mode) {
261 case OMAPFB_COLOR_YUV422:
262 case OMAPFB_COLOR_YUV420:
263 case OMAPFB_COLOR_YUY422:
264 r = -EINVAL;
265 break;
266 case OMAPFB_COLOR_CLUT_8BPP:
267 case OMAPFB_COLOR_CLUT_4BPP:
268 case OMAPFB_COLOR_CLUT_2BPP:
269 case OMAPFB_COLOR_CLUT_1BPP:
270 if (fbdev->ctrl->setcolreg)
271 r = fbdev->ctrl->setcolreg(regno, red, green, blue,
272 transp, update_hw_pal);
273 /* Fallthrough */
274 case OMAPFB_COLOR_RGB565:
275 case OMAPFB_COLOR_RGB444:
276 if (r != 0)
277 break;
278
279 if (regno < 0) {
280 r = -EINVAL;
281 break;
282 }
283
284 if (regno < 16) {
285 u16 pal;
286 pal = ((red >> (16 - var->red.length)) <<
287 var->red.offset) |
288 ((green >> (16 - var->green.length)) <<
289 var->green.offset) |
290 (blue >> (16 - var->blue.length));
291 ((u32 *)(info->pseudo_palette))[regno] = pal;
292 }
293 break;
294 default:
295 BUG();
296 }
297 return r;
298 }
299
300 static int omapfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
301 u_int transp, struct fb_info *info)
302 {
303 return _setcolreg(info, regno, red, green, blue, transp, 1);
304 }
305
306 static int omapfb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
307 {
308 int count, index, r;
309 u16 *red, *green, *blue, *transp;
310 u16 trans = 0xffff;
311
312 red = cmap->red;
313 green = cmap->green;
314 blue = cmap->blue;
315 transp = cmap->transp;
316 index = cmap->start;
317
318 for (count = 0; count < cmap->len; count++) {
319 if (transp)
320 trans = *transp++;
321 r = _setcolreg(info, index++, *red++, *green++, *blue++, trans,
322 count == cmap->len - 1);
323 if (r != 0)
324 return r;
325 }
326
327 return 0;
328 }
329
330 static int omapfb_update_full_screen(struct fb_info *fbi);
331
332 static int omapfb_blank(int blank, struct fb_info *fbi)
333 {
334 struct omapfb_plane_struct *plane = fbi->par;
335 struct omapfb_device *fbdev = plane->fbdev;
336 int do_update = 0;
337 int r = 0;
338
339 omapfb_rqueue_lock(fbdev);
340 switch (blank) {
341 case VESA_NO_BLANKING:
342 if (fbdev->state == OMAPFB_SUSPENDED) {
343 if (fbdev->ctrl->resume)
344 fbdev->ctrl->resume();
345 fbdev->panel->enable(fbdev->panel);
346 fbdev->state = OMAPFB_ACTIVE;
347 if (fbdev->ctrl->get_update_mode() ==
348 OMAPFB_MANUAL_UPDATE)
349 do_update = 1;
350 }
351 break;
352 case VESA_POWERDOWN:
353 if (fbdev->state == OMAPFB_ACTIVE) {
354 fbdev->panel->disable(fbdev->panel);
355 if (fbdev->ctrl->suspend)
356 fbdev->ctrl->suspend();
357 fbdev->state = OMAPFB_SUSPENDED;
358 }
359 break;
360 default:
361 r = -EINVAL;
362 }
363 omapfb_rqueue_unlock(fbdev);
364
365 if (r == 0 && do_update)
366 r = omapfb_update_full_screen(fbi);
367
368 return r;
369 }
370
371 static void omapfb_sync(struct fb_info *fbi)
372 {
373 struct omapfb_plane_struct *plane = fbi->par;
374 struct omapfb_device *fbdev = plane->fbdev;
375
376 omapfb_rqueue_lock(fbdev);
377 if (fbdev->ctrl->sync)
378 fbdev->ctrl->sync();
379 omapfb_rqueue_unlock(fbdev);
380 }
381
382 /*
383 * Set fb_info.fix fields and also updates fbdev.
384 * When calling this fb_info.var must be set up already.
385 */
386 static void set_fb_fix(struct fb_info *fbi)
387 {
388 struct fb_fix_screeninfo *fix = &fbi->fix;
389 struct fb_var_screeninfo *var = &fbi->var;
390 struct omapfb_plane_struct *plane = fbi->par;
391 struct omapfb_mem_region *rg;
392 int bpp;
393
394 rg = &plane->fbdev->mem_desc.region[plane->idx];
395 fbi->screen_base = rg->vaddr;
396 fix->smem_start = rg->paddr;
397 fix->smem_len = rg->size;
398
399 fix->type = FB_TYPE_PACKED_PIXELS;
400 bpp = var->bits_per_pixel;
401 if (var->nonstd)
402 fix->visual = FB_VISUAL_PSEUDOCOLOR;
403 else switch (var->bits_per_pixel) {
404 case 16:
405 case 12:
406 fix->visual = FB_VISUAL_TRUECOLOR;
407 /* 12bpp is stored in 16 bits */
408 bpp = 16;
409 break;
410 case 1:
411 case 2:
412 case 4:
413 case 8:
414 fix->visual = FB_VISUAL_PSEUDOCOLOR;
415 break;
416 }
417 fix->accel = FB_ACCEL_OMAP1610;
418 fix->line_length = var->xres_virtual * bpp / 8;
419 }
420
421 static int set_color_mode(struct omapfb_plane_struct *plane,
422 struct fb_var_screeninfo *var)
423 {
424 switch (var->nonstd) {
425 case 0:
426 break;
427 case OMAPFB_COLOR_YUV422:
428 var->bits_per_pixel = 16;
429 plane->color_mode = var->nonstd;
430 return 0;
431 case OMAPFB_COLOR_YUV420:
432 var->bits_per_pixel = 12;
433 plane->color_mode = var->nonstd;
434 return 0;
435 case OMAPFB_COLOR_YUY422:
436 var->bits_per_pixel = 16;
437 plane->color_mode = var->nonstd;
438 return 0;
439 default:
440 return -EINVAL;
441 }
442
443 switch (var->bits_per_pixel) {
444 case 1:
445 plane->color_mode = OMAPFB_COLOR_CLUT_1BPP;
446 return 0;
447 case 2:
448 plane->color_mode = OMAPFB_COLOR_CLUT_2BPP;
449 return 0;
450 case 4:
451 plane->color_mode = OMAPFB_COLOR_CLUT_4BPP;
452 return 0;
453 case 8:
454 plane->color_mode = OMAPFB_COLOR_CLUT_8BPP;
455 return 0;
456 case 12:
457 var->bits_per_pixel = 16;
458 plane->color_mode = OMAPFB_COLOR_RGB444;
459 return 0;
460 case 16:
461 plane->color_mode = OMAPFB_COLOR_RGB565;
462 return 0;
463 default:
464 return -EINVAL;
465 }
466 }
467
468 /*
469 * Check the values in var against our capabilities and in case of out of
470 * bound values try to adjust them.
471 */
472 static int set_fb_var(struct fb_info *fbi,
473 struct fb_var_screeninfo *var)
474 {
475 int bpp;
476 unsigned long max_frame_size;
477 unsigned long line_size;
478 int xres_min, xres_max;
479 int yres_min, yres_max;
480 struct omapfb_plane_struct *plane = fbi->par;
481 struct omapfb_device *fbdev = plane->fbdev;
482 struct lcd_panel *panel = fbdev->panel;
483
484 if (set_color_mode(plane, var) < 0)
485 return -EINVAL;
486
487 bpp = var->bits_per_pixel;
488 if (plane->color_mode == OMAPFB_COLOR_RGB444)
489 bpp = 16;
490
491 switch (var->rotate) {
492 case 0:
493 case 180:
494 xres_min = OMAPFB_PLANE_XRES_MIN;
495 xres_max = panel->x_res;
496 yres_min = OMAPFB_PLANE_YRES_MIN;
497 yres_max = panel->y_res;
498 if (cpu_is_omap15xx()) {
499 var->xres = panel->x_res;
500 var->yres = panel->y_res;
501 }
502 break;
503 case 90:
504 case 270:
505 xres_min = OMAPFB_PLANE_YRES_MIN;
506 xres_max = panel->y_res;
507 yres_min = OMAPFB_PLANE_XRES_MIN;
508 yres_max = panel->x_res;
509 if (cpu_is_omap15xx()) {
510 var->xres = panel->y_res;
511 var->yres = panel->x_res;
512 }
513 break;
514 default:
515 return -EINVAL;
516 }
517
518 if (var->xres < xres_min)
519 var->xres = xres_min;
520 if (var->yres < yres_min)
521 var->yres = yres_min;
522 if (var->xres > xres_max)
523 var->xres = xres_max;
524 if (var->yres > yres_max)
525 var->yres = yres_max;
526
527 if (var->xres_virtual < var->xres)
528 var->xres_virtual = var->xres;
529 if (var->yres_virtual < var->yres)
530 var->yres_virtual = var->yres;
531 max_frame_size = fbdev->mem_desc.region[plane->idx].size;
532 line_size = var->xres_virtual * bpp / 8;
533 if (line_size * var->yres_virtual > max_frame_size) {
534 /* Try to keep yres_virtual first */
535 line_size = max_frame_size / var->yres_virtual;
536 var->xres_virtual = line_size * 8 / bpp;
537 if (var->xres_virtual < var->xres) {
538 /* Still doesn't fit. Shrink yres_virtual too */
539 var->xres_virtual = var->xres;
540 line_size = var->xres * bpp / 8;
541 var->yres_virtual = max_frame_size / line_size;
542 }
543 /* Recheck this, as the virtual size changed. */
544 if (var->xres_virtual < var->xres)
545 var->xres = var->xres_virtual;
546 if (var->yres_virtual < var->yres)
547 var->yres = var->yres_virtual;
548 if (var->xres < xres_min || var->yres < yres_min)
549 return -EINVAL;
550 }
551 if (var->xres + var->xoffset > var->xres_virtual)
552 var->xoffset = var->xres_virtual - var->xres;
553 if (var->yres + var->yoffset > var->yres_virtual)
554 var->yoffset = var->yres_virtual - var->yres;
555 line_size = var->xres * bpp / 8;
556
557 if (plane->color_mode == OMAPFB_COLOR_RGB444) {
558 var->red.offset = 8; var->red.length = 4;
559 var->red.msb_right = 0;
560 var->green.offset = 4; var->green.length = 4;
561 var->green.msb_right = 0;
562 var->blue.offset = 0; var->blue.length = 4;
563 var->blue.msb_right = 0;
564 } else {
565 var->red.offset = 11; var->red.length = 5;
566 var->red.msb_right = 0;
567 var->green.offset = 5; var->green.length = 6;
568 var->green.msb_right = 0;
569 var->blue.offset = 0; var->blue.length = 5;
570 var->blue.msb_right = 0;
571 }
572
573 var->height = -1;
574 var->width = -1;
575 var->grayscale = 0;
576
577 /* pixclock in ps, the rest in pixclock */
578 var->pixclock = 10000000 / (panel->pixel_clock / 100);
579 var->left_margin = panel->hfp;
580 var->right_margin = panel->hbp;
581 var->upper_margin = panel->vfp;
582 var->lower_margin = panel->vbp;
583 var->hsync_len = panel->hsw;
584 var->vsync_len = panel->vsw;
585
586 /* TODO: get these from panel->config */
587 var->vmode = FB_VMODE_NONINTERLACED;
588 var->sync = 0;
589
590 return 0;
591 }
592
593
594 /* Set rotation (0, 90, 180, 270 degree), and switch to the new mode. */
595 static void omapfb_rotate(struct fb_info *fbi, int rotate)
596 {
597 struct omapfb_plane_struct *plane = fbi->par;
598 struct omapfb_device *fbdev = plane->fbdev;
599
600 omapfb_rqueue_lock(fbdev);
601 if (cpu_is_omap15xx() && rotate != fbi->var.rotate) {
602 struct fb_var_screeninfo *new_var = &fbdev->new_var;
603
604 memcpy(new_var, &fbi->var, sizeof(*new_var));
605 new_var->rotate = rotate;
606 if (set_fb_var(fbi, new_var) == 0 &&
607 memcmp(new_var, &fbi->var, sizeof(*new_var))) {
608 memcpy(&fbi->var, new_var, sizeof(*new_var));
609 ctrl_change_mode(fbi);
610 }
611 }
612 omapfb_rqueue_unlock(fbdev);
613 }
614
615 /*
616 * Set new x,y offsets in the virtual display for the visible area and switch
617 * to the new mode.
618 */
619 static int omapfb_pan_display(struct fb_var_screeninfo *var,
620 struct fb_info *fbi)
621 {
622 struct omapfb_plane_struct *plane = fbi->par;
623 struct omapfb_device *fbdev = plane->fbdev;
624 int r = 0;
625
626 omapfb_rqueue_lock(fbdev);
627 if (var->xoffset != fbi->var.xoffset ||
628 var->yoffset != fbi->var.yoffset) {
629 struct fb_var_screeninfo *new_var = &fbdev->new_var;
630
631 memcpy(new_var, &fbi->var, sizeof(*new_var));
632 new_var->xoffset = var->xoffset;
633 new_var->yoffset = var->yoffset;
634 if (set_fb_var(fbi, new_var))
635 r = -EINVAL;
636 else {
637 memcpy(&fbi->var, new_var, sizeof(*new_var));
638 ctrl_change_mode(fbi);
639 }
640 }
641 omapfb_rqueue_unlock(fbdev);
642
643 return r;
644 }
645
646 /* Set mirror to vertical axis and switch to the new mode. */
647 static int omapfb_mirror(struct fb_info *fbi, int mirror)
648 {
649 struct omapfb_plane_struct *plane = fbi->par;
650 struct omapfb_device *fbdev = plane->fbdev;
651 int r = 0;
652
653 omapfb_rqueue_lock(fbdev);
654 mirror = mirror ? 1 : 0;
655 if (cpu_is_omap15xx())
656 r = -EINVAL;
657 else if (mirror != plane->info.mirror) {
658 plane->info.mirror = mirror;
659 r = ctrl_change_mode(fbi);
660 }
661 omapfb_rqueue_unlock(fbdev);
662
663 return r;
664 }
665
666 /*
667 * Check values in var, try to adjust them in case of out of bound values if
668 * possible, or return error.
669 */
670 static int omapfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
671 {
672 struct omapfb_plane_struct *plane = fbi->par;
673 struct omapfb_device *fbdev = plane->fbdev;
674 int r;
675
676 omapfb_rqueue_lock(fbdev);
677 if (fbdev->ctrl->sync != NULL)
678 fbdev->ctrl->sync();
679 r = set_fb_var(fbi, var);
680 omapfb_rqueue_unlock(fbdev);
681
682 return r;
683 }
684
685 /*
686 * Switch to a new mode. The parameters for it has been check already by
687 * omapfb_check_var.
688 */
689 static int omapfb_set_par(struct fb_info *fbi)
690 {
691 struct omapfb_plane_struct *plane = fbi->par;
692 struct omapfb_device *fbdev = plane->fbdev;
693 int r = 0;
694
695 omapfb_rqueue_lock(fbdev);
696 set_fb_fix(fbi);
697 r = ctrl_change_mode(fbi);
698 omapfb_rqueue_unlock(fbdev);
699
700 return r;
701 }
702
703 int omapfb_update_window_async(struct fb_info *fbi,
704 struct omapfb_update_window *win,
705 void (*callback)(void *),
706 void *callback_data)
707 {
708 struct omapfb_plane_struct *plane = fbi->par;
709 struct omapfb_device *fbdev = plane->fbdev;
710 struct fb_var_screeninfo *var;
711
712 var = &fbi->var;
713 if (win->x >= var->xres || win->y >= var->yres ||
714 win->out_x > var->xres || win->out_y >= var->yres)
715 return -EINVAL;
716
717 if (!fbdev->ctrl->update_window ||
718 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
719 return -ENODEV;
720
721 if (win->x + win->width >= var->xres)
722 win->width = var->xres - win->x;
723 if (win->y + win->height >= var->yres)
724 win->height = var->yres - win->y;
725 /* The out sizes should be cropped to the LCD size */
726 if (win->out_x + win->out_width > fbdev->panel->x_res)
727 win->out_width = fbdev->panel->x_res - win->out_x;
728 if (win->out_y + win->out_height > fbdev->panel->y_res)
729 win->out_height = fbdev->panel->y_res - win->out_y;
730 if (!win->width || !win->height || !win->out_width || !win->out_height)
731 return 0;
732
733 return fbdev->ctrl->update_window(fbi, win, callback, callback_data);
734 }
735 EXPORT_SYMBOL(omapfb_update_window_async);
736
737 static int omapfb_update_win(struct fb_info *fbi,
738 struct omapfb_update_window *win)
739 {
740 struct omapfb_plane_struct *plane = fbi->par;
741 int ret;
742
743 omapfb_rqueue_lock(plane->fbdev);
744 ret = omapfb_update_window_async(fbi, win, NULL, NULL);
745 omapfb_rqueue_unlock(plane->fbdev);
746
747 return ret;
748 }
749
750 static int omapfb_update_full_screen(struct fb_info *fbi)
751 {
752 struct omapfb_plane_struct *plane = fbi->par;
753 struct omapfb_device *fbdev = plane->fbdev;
754 struct omapfb_update_window win;
755 int r;
756
757 if (!fbdev->ctrl->update_window ||
758 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
759 return -ENODEV;
760
761 win.x = 0;
762 win.y = 0;
763 win.width = fbi->var.xres;
764 win.height = fbi->var.yres;
765 win.out_x = 0;
766 win.out_y = 0;
767 win.out_width = fbi->var.xres;
768 win.out_height = fbi->var.yres;
769 win.format = 0;
770
771 omapfb_rqueue_lock(fbdev);
772 r = fbdev->ctrl->update_window(fbi, &win, NULL, NULL);
773 omapfb_rqueue_unlock(fbdev);
774
775 return r;
776 }
777
778 static int omapfb_setup_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
779 {
780 struct omapfb_plane_struct *plane = fbi->par;
781 struct omapfb_device *fbdev = plane->fbdev;
782 struct lcd_panel *panel = fbdev->panel;
783 struct omapfb_plane_info old_info;
784 int r = 0;
785
786 if (pi->pos_x + pi->out_width > panel->x_res ||
787 pi->pos_y + pi->out_height > panel->y_res)
788 return -EINVAL;
789
790 omapfb_rqueue_lock(fbdev);
791 if (pi->enabled && !fbdev->mem_desc.region[plane->idx].size) {
792 /*
793 * This plane's memory was freed, can't enable it
794 * until it's reallocated.
795 */
796 r = -EINVAL;
797 goto out;
798 }
799 old_info = plane->info;
800 plane->info = *pi;
801 if (pi->enabled) {
802 r = ctrl_change_mode(fbi);
803 if (r < 0) {
804 plane->info = old_info;
805 goto out;
806 }
807 }
808 r = fbdev->ctrl->enable_plane(plane->idx, pi->enabled);
809 if (r < 0) {
810 plane->info = old_info;
811 goto out;
812 }
813 out:
814 omapfb_rqueue_unlock(fbdev);
815 return r;
816 }
817
818 static int omapfb_query_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
819 {
820 struct omapfb_plane_struct *plane = fbi->par;
821
822 *pi = plane->info;
823 return 0;
824 }
825
826 static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
827 {
828 struct omapfb_plane_struct *plane = fbi->par;
829 struct omapfb_device *fbdev = plane->fbdev;
830 struct omapfb_mem_region *rg = &fbdev->mem_desc.region[plane->idx];
831 size_t size;
832 int r = 0;
833
834 if (fbdev->ctrl->setup_mem == NULL)
835 return -ENODEV;
836 if (mi->type > OMAPFB_MEMTYPE_MAX)
837 return -EINVAL;
838
839 size = PAGE_ALIGN(mi->size);
840 omapfb_rqueue_lock(fbdev);
841 if (plane->info.enabled) {
842 r = -EBUSY;
843 goto out;
844 }
845 if (rg->size != size || rg->type != mi->type) {
846 struct fb_var_screeninfo *new_var = &fbdev->new_var;
847 unsigned long old_size = rg->size;
848 u8 old_type = rg->type;
849 unsigned long paddr;
850
851 rg->size = size;
852 rg->type = mi->type;
853 /*
854 * size == 0 is a special case, for which we
855 * don't check / adjust the screen parameters.
856 * This isn't a problem since the plane can't
857 * be reenabled unless its size is > 0.
858 */
859 if (old_size != size && size) {
860 if (size) {
861 memcpy(new_var, &fbi->var, sizeof(*new_var));
862 r = set_fb_var(fbi, new_var);
863 if (r < 0)
864 goto out;
865 }
866 }
867
868 if (fbdev->ctrl->sync)
869 fbdev->ctrl->sync();
870 r = fbdev->ctrl->setup_mem(plane->idx, size, mi->type, &paddr);
871 if (r < 0) {
872 /* Revert changes. */
873 rg->size = old_size;
874 rg->type = old_type;
875 goto out;
876 }
877 rg->paddr = paddr;
878
879 if (old_size != size) {
880 if (size) {
881 memcpy(&fbi->var, new_var, sizeof(fbi->var));
882 set_fb_fix(fbi);
883 } else {
884 /*
885 * Set these explicitly to indicate that the
886 * plane memory is dealloce'd, the other
887 * screen parameters in var / fix are invalid.
888 */
889 fbi->fix.smem_start = 0;
890 fbi->fix.smem_len = 0;
891 }
892 }
893 }
894 out:
895 omapfb_rqueue_unlock(fbdev);
896
897 return r;
898 }
899
900 static int omapfb_query_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
901 {
902 struct omapfb_plane_struct *plane = fbi->par;
903 struct omapfb_device *fbdev = plane->fbdev;
904 struct omapfb_mem_region *rg;
905
906 rg = &fbdev->mem_desc.region[plane->idx];
907 memset(mi, 0, sizeof(*mi));
908 mi->size = rg->size;
909 mi->type = rg->type;
910
911 return 0;
912 }
913
914 static int omapfb_set_color_key(struct omapfb_device *fbdev,
915 struct omapfb_color_key *ck)
916 {
917 int r;
918
919 if (!fbdev->ctrl->set_color_key)
920 return -ENODEV;
921
922 omapfb_rqueue_lock(fbdev);
923 r = fbdev->ctrl->set_color_key(ck);
924 omapfb_rqueue_unlock(fbdev);
925
926 return r;
927 }
928
929 static int omapfb_get_color_key(struct omapfb_device *fbdev,
930 struct omapfb_color_key *ck)
931 {
932 int r;
933
934 if (!fbdev->ctrl->get_color_key)
935 return -ENODEV;
936
937 omapfb_rqueue_lock(fbdev);
938 r = fbdev->ctrl->get_color_key(ck);
939 omapfb_rqueue_unlock(fbdev);
940
941 return r;
942 }
943
944 static struct blocking_notifier_head omapfb_client_list[OMAPFB_PLANE_NUM];
945 static int notifier_inited;
946
947 static void omapfb_init_notifier(void)
948 {
949 int i;
950
951 for (i = 0; i < OMAPFB_PLANE_NUM; i++)
952 BLOCKING_INIT_NOTIFIER_HEAD(&omapfb_client_list[i]);
953 }
954
955 int omapfb_register_client(struct omapfb_notifier_block *omapfb_nb,
956 omapfb_notifier_callback_t callback,
957 void *callback_data)
958 {
959 int r;
960
961 if ((unsigned)omapfb_nb->plane_idx > OMAPFB_PLANE_NUM)
962 return -EINVAL;
963
964 if (!notifier_inited) {
965 omapfb_init_notifier();
966 notifier_inited = 1;
967 }
968
969 omapfb_nb->nb.notifier_call = (int (*)(struct notifier_block *,
970 unsigned long, void *))callback;
971 omapfb_nb->data = callback_data;
972 r = blocking_notifier_chain_register(
973 &omapfb_client_list[omapfb_nb->plane_idx],
974 &omapfb_nb->nb);
975 if (r)
976 return r;
977 if (omapfb_dev != NULL &&
978 omapfb_dev->ctrl && omapfb_dev->ctrl->bind_client) {
979 omapfb_dev->ctrl->bind_client(omapfb_nb);
980 }
981
982 return 0;
983 }
984 EXPORT_SYMBOL(omapfb_register_client);
985
986 int omapfb_unregister_client(struct omapfb_notifier_block *omapfb_nb)
987 {
988 return blocking_notifier_chain_unregister(
989 &omapfb_client_list[omapfb_nb->plane_idx], &omapfb_nb->nb);
990 }
991 EXPORT_SYMBOL(omapfb_unregister_client);
992
993 void omapfb_notify_clients(struct omapfb_device *fbdev, unsigned long event)
994 {
995 int i;
996
997 if (!notifier_inited)
998 /* no client registered yet */
999 return;
1000
1001 for (i = 0; i < OMAPFB_PLANE_NUM; i++)
1002 blocking_notifier_call_chain(&omapfb_client_list[i], event,
1003 fbdev->fb_info[i]);
1004 }
1005 EXPORT_SYMBOL(omapfb_notify_clients);
1006
1007 static int omapfb_set_update_mode(struct omapfb_device *fbdev,
1008 enum omapfb_update_mode mode)
1009 {
1010 int r;
1011
1012 omapfb_rqueue_lock(fbdev);
1013 r = fbdev->ctrl->set_update_mode(mode);
1014 omapfb_rqueue_unlock(fbdev);
1015
1016 return r;
1017 }
1018
1019 static enum omapfb_update_mode omapfb_get_update_mode(struct omapfb_device *fbdev)
1020 {
1021 int r;
1022
1023 omapfb_rqueue_lock(fbdev);
1024 r = fbdev->ctrl->get_update_mode();
1025 omapfb_rqueue_unlock(fbdev);
1026
1027 return r;
1028 }
1029
1030 static void omapfb_get_caps(struct omapfb_device *fbdev, int plane,
1031 struct omapfb_caps *caps)
1032 {
1033 memset(caps, 0, sizeof(*caps));
1034 fbdev->ctrl->get_caps(plane, caps);
1035 caps->ctrl |= fbdev->panel->get_caps(fbdev->panel);
1036 }
1037
1038 /* For lcd testing */
1039 void omapfb_write_first_pixel(struct omapfb_device *fbdev, u16 pixval)
1040 {
1041 omapfb_rqueue_lock(fbdev);
1042 *(u16 *)fbdev->mem_desc.region[0].vaddr = pixval;
1043 if (fbdev->ctrl->get_update_mode() == OMAPFB_MANUAL_UPDATE) {
1044 struct omapfb_update_window win;
1045
1046 memset(&win, 0, sizeof(win));
1047 win.width = 2;
1048 win.height = 2;
1049 win.out_width = 2;
1050 win.out_height = 2;
1051 fbdev->ctrl->update_window(fbdev->fb_info[0], &win, NULL, NULL);
1052 }
1053 omapfb_rqueue_unlock(fbdev);
1054 }
1055 EXPORT_SYMBOL(omapfb_write_first_pixel);
1056
1057 /*
1058 * Ioctl interface. Part of the kernel mode frame buffer API is duplicated
1059 * here to be accessible by user mode code.
1060 */
1061 static int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd,
1062 unsigned long arg)
1063 {
1064 struct omapfb_plane_struct *plane = fbi->par;
1065 struct omapfb_device *fbdev = plane->fbdev;
1066 struct fb_ops *ops = fbi->fbops;
1067 union {
1068 struct omapfb_update_window update_window;
1069 struct omapfb_plane_info plane_info;
1070 struct omapfb_mem_info mem_info;
1071 struct omapfb_color_key color_key;
1072 enum omapfb_update_mode update_mode;
1073 struct omapfb_caps caps;
1074 unsigned int mirror;
1075 int plane_out;
1076 int enable_plane;
1077 } p;
1078 int r = 0;
1079
1080 BUG_ON(!ops);
1081 switch (cmd) {
1082 case OMAPFB_MIRROR:
1083 if (get_user(p.mirror, (int __user *)arg))
1084 r = -EFAULT;
1085 else
1086 omapfb_mirror(fbi, p.mirror);
1087 break;
1088 case OMAPFB_SYNC_GFX:
1089 omapfb_sync(fbi);
1090 break;
1091 case OMAPFB_VSYNC:
1092 break;
1093 case OMAPFB_SET_UPDATE_MODE:
1094 if (get_user(p.update_mode, (int __user *)arg))
1095 r = -EFAULT;
1096 else
1097 r = omapfb_set_update_mode(fbdev, p.update_mode);
1098 break;
1099 case OMAPFB_GET_UPDATE_MODE:
1100 p.update_mode = omapfb_get_update_mode(fbdev);
1101 if (put_user(p.update_mode,
1102 (enum omapfb_update_mode __user *)arg))
1103 r = -EFAULT;
1104 break;
1105 case OMAPFB_UPDATE_WINDOW_OLD:
1106 if (copy_from_user(&p.update_window, (void __user *)arg,
1107 sizeof(struct omapfb_update_window_old)))
1108 r = -EFAULT;
1109 else {
1110 struct omapfb_update_window *u = &p.update_window;
1111 u->out_x = u->x;
1112 u->out_y = u->y;
1113 u->out_width = u->width;
1114 u->out_height = u->height;
1115 memset(u->reserved, 0, sizeof(u->reserved));
1116 r = omapfb_update_win(fbi, u);
1117 }
1118 break;
1119 case OMAPFB_UPDATE_WINDOW:
1120 if (copy_from_user(&p.update_window, (void __user *)arg,
1121 sizeof(p.update_window)))
1122 r = -EFAULT;
1123 else
1124 r = omapfb_update_win(fbi, &p.update_window);
1125 break;
1126 case OMAPFB_SETUP_PLANE:
1127 if (copy_from_user(&p.plane_info, (void __user *)arg,
1128 sizeof(p.plane_info)))
1129 r = -EFAULT;
1130 else
1131 r = omapfb_setup_plane(fbi, &p.plane_info);
1132 break;
1133 case OMAPFB_QUERY_PLANE:
1134 if ((r = omapfb_query_plane(fbi, &p.plane_info)) < 0)
1135 break;
1136 if (copy_to_user((void __user *)arg, &p.plane_info,
1137 sizeof(p.plane_info)))
1138 r = -EFAULT;
1139 break;
1140 case OMAPFB_SETUP_MEM:
1141 if (copy_from_user(&p.mem_info, (void __user *)arg,
1142 sizeof(p.mem_info)))
1143 r = -EFAULT;
1144 else
1145 r = omapfb_setup_mem(fbi, &p.mem_info);
1146 break;
1147 case OMAPFB_QUERY_MEM:
1148 if ((r = omapfb_query_mem(fbi, &p.mem_info)) < 0)
1149 break;
1150 if (copy_to_user((void __user *)arg, &p.mem_info,
1151 sizeof(p.mem_info)))
1152 r = -EFAULT;
1153 break;
1154 case OMAPFB_SET_COLOR_KEY:
1155 if (copy_from_user(&p.color_key, (void __user *)arg,
1156 sizeof(p.color_key)))
1157 r = -EFAULT;
1158 else
1159 r = omapfb_set_color_key(fbdev, &p.color_key);
1160 break;
1161 case OMAPFB_GET_COLOR_KEY:
1162 if ((r = omapfb_get_color_key(fbdev, &p.color_key)) < 0)
1163 break;
1164 if (copy_to_user((void __user *)arg, &p.color_key,
1165 sizeof(p.color_key)))
1166 r = -EFAULT;
1167 break;
1168 case OMAPFB_GET_CAPS:
1169 omapfb_get_caps(fbdev, plane->idx, &p.caps);
1170 if (copy_to_user((void __user *)arg, &p.caps, sizeof(p.caps)))
1171 r = -EFAULT;
1172 break;
1173 case OMAPFB_LCD_TEST:
1174 {
1175 int test_num;
1176
1177 if (get_user(test_num, (int __user *)arg)) {
1178 r = -EFAULT;
1179 break;
1180 }
1181 if (!fbdev->panel->run_test) {
1182 r = -EINVAL;
1183 break;
1184 }
1185 r = fbdev->panel->run_test(fbdev->panel, test_num);
1186 break;
1187 }
1188 case OMAPFB_CTRL_TEST:
1189 {
1190 int test_num;
1191
1192 if (get_user(test_num, (int __user *)arg)) {
1193 r = -EFAULT;
1194 break;
1195 }
1196 if (!fbdev->ctrl->run_test) {
1197 r = -EINVAL;
1198 break;
1199 }
1200 r = fbdev->ctrl->run_test(test_num);
1201 break;
1202 }
1203 default:
1204 r = -EINVAL;
1205 }
1206
1207 return r;
1208 }
1209
1210 static int omapfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
1211 {
1212 struct omapfb_plane_struct *plane = info->par;
1213 struct omapfb_device *fbdev = plane->fbdev;
1214 int r;
1215
1216 omapfb_rqueue_lock(fbdev);
1217 r = fbdev->ctrl->mmap(info, vma);
1218 omapfb_rqueue_unlock(fbdev);
1219
1220 return r;
1221 }
1222
1223 /*
1224 * Callback table for the frame buffer framework. Some of these pointers
1225 * will be changed according to the current setting of fb_info->accel_flags.
1226 */
1227 static struct fb_ops omapfb_ops = {
1228 .owner = THIS_MODULE,
1229 .fb_open = omapfb_open,
1230 .fb_release = omapfb_release,
1231 .fb_setcolreg = omapfb_setcolreg,
1232 .fb_setcmap = omapfb_setcmap,
1233 .fb_fillrect = cfb_fillrect,
1234 .fb_copyarea = cfb_copyarea,
1235 .fb_imageblit = cfb_imageblit,
1236 .fb_blank = omapfb_blank,
1237 .fb_ioctl = omapfb_ioctl,
1238 .fb_check_var = omapfb_check_var,
1239 .fb_set_par = omapfb_set_par,
1240 .fb_rotate = omapfb_rotate,
1241 .fb_pan_display = omapfb_pan_display,
1242 };
1243
1244 /*
1245 * ---------------------------------------------------------------------------
1246 * Sysfs interface
1247 * ---------------------------------------------------------------------------
1248 */
1249 /* omapfbX sysfs entries */
1250 static ssize_t omapfb_show_caps_num(struct device *dev,
1251 struct device_attribute *attr, char *buf)
1252 {
1253 struct omapfb_device *fbdev = (struct omapfb_device *)dev->driver_data;
1254 int plane;
1255 size_t size;
1256 struct omapfb_caps caps;
1257
1258 plane = 0;
1259 size = 0;
1260 while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1261 omapfb_get_caps(fbdev, plane, &caps);
1262 size += snprintf(&buf[size], PAGE_SIZE - size,
1263 "plane#%d %#010x %#010x %#010x\n",
1264 plane, caps.ctrl, caps.plane_color, caps.wnd_color);
1265 plane++;
1266 }
1267 return size;
1268 }
1269
1270 static ssize_t omapfb_show_caps_text(struct device *dev,
1271 struct device_attribute *attr, char *buf)
1272 {
1273 struct omapfb_device *fbdev = (struct omapfb_device *)dev->driver_data;
1274 int i;
1275 struct omapfb_caps caps;
1276 int plane;
1277 size_t size;
1278
1279 plane = 0;
1280 size = 0;
1281 while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1282 omapfb_get_caps(fbdev, plane, &caps);
1283 size += snprintf(&buf[size], PAGE_SIZE - size,
1284 "plane#%d:\n", plane);
1285 for (i = 0; i < ARRAY_SIZE(ctrl_caps) &&
1286 size < PAGE_SIZE; i++) {
1287 if (ctrl_caps[i].flag & caps.ctrl)
1288 size += snprintf(&buf[size], PAGE_SIZE - size,
1289 " %s\n", ctrl_caps[i].name);
1290 }
1291 size += snprintf(&buf[size], PAGE_SIZE - size,
1292 " plane colors:\n");
1293 for (i = 0; i < ARRAY_SIZE(color_caps) &&
1294 size < PAGE_SIZE; i++) {
1295 if (color_caps[i].flag & caps.plane_color)
1296 size += snprintf(&buf[size], PAGE_SIZE - size,
1297 " %s\n", color_caps[i].name);
1298 }
1299 size += snprintf(&buf[size], PAGE_SIZE - size,
1300 " window colors:\n");
1301 for (i = 0; i < ARRAY_SIZE(color_caps) &&
1302 size < PAGE_SIZE; i++) {
1303 if (color_caps[i].flag & caps.wnd_color)
1304 size += snprintf(&buf[size], PAGE_SIZE - size,
1305 " %s\n", color_caps[i].name);
1306 }
1307
1308 plane++;
1309 }
1310 return size;
1311 }
1312
1313 static DEVICE_ATTR(caps_num, 0444, omapfb_show_caps_num, NULL);
1314 static DEVICE_ATTR(caps_text, 0444, omapfb_show_caps_text, NULL);
1315
1316 /* panel sysfs entries */
1317 static ssize_t omapfb_show_panel_name(struct device *dev,
1318 struct device_attribute *attr, char *buf)
1319 {
1320 struct omapfb_device *fbdev = (struct omapfb_device *)dev->driver_data;
1321
1322 return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->panel->name);
1323 }
1324
1325 static ssize_t omapfb_show_bklight_level(struct device *dev,
1326 struct device_attribute *attr,
1327 char *buf)
1328 {
1329 struct omapfb_device *fbdev = (struct omapfb_device *)dev->driver_data;
1330 int r;
1331
1332 if (fbdev->panel->get_bklight_level) {
1333 r = snprintf(buf, PAGE_SIZE, "%d\n",
1334 fbdev->panel->get_bklight_level(fbdev->panel));
1335 } else
1336 r = -ENODEV;
1337 return r;
1338 }
1339
1340 static ssize_t omapfb_store_bklight_level(struct device *dev,
1341 struct device_attribute *attr,
1342 const char *buf, size_t size)
1343 {
1344 struct omapfb_device *fbdev = (struct omapfb_device *)dev->driver_data;
1345 int r;
1346
1347 if (fbdev->panel->set_bklight_level) {
1348 unsigned int level;
1349
1350 if (sscanf(buf, "%10d", &level) == 1) {
1351 r = fbdev->panel->set_bklight_level(fbdev->panel,
1352 level);
1353 } else
1354 r = -EINVAL;
1355 } else
1356 r = -ENODEV;
1357 return r ? r : size;
1358 }
1359
1360 static ssize_t omapfb_show_bklight_max(struct device *dev,
1361 struct device_attribute *attr, char *buf)
1362 {
1363 struct omapfb_device *fbdev = (struct omapfb_device *)dev->driver_data;
1364 int r;
1365
1366 if (fbdev->panel->get_bklight_level) {
1367 r = snprintf(buf, PAGE_SIZE, "%d\n",
1368 fbdev->panel->get_bklight_max(fbdev->panel));
1369 } else
1370 r = -ENODEV;
1371 return r;
1372 }
1373
1374 static struct device_attribute dev_attr_panel_name =
1375 __ATTR(name, 0444, omapfb_show_panel_name, NULL);
1376 static DEVICE_ATTR(backlight_level, 0664,
1377 omapfb_show_bklight_level, omapfb_store_bklight_level);
1378 static DEVICE_ATTR(backlight_max, 0444, omapfb_show_bklight_max, NULL);
1379
1380 static struct attribute *panel_attrs[] = {
1381 &dev_attr_panel_name.attr,
1382 &dev_attr_backlight_level.attr,
1383 &dev_attr_backlight_max.attr,
1384 NULL,
1385 };
1386
1387 static struct attribute_group panel_attr_grp = {
1388 .name = "panel",
1389 .attrs = panel_attrs,
1390 };
1391
1392 /* ctrl sysfs entries */
1393 static ssize_t omapfb_show_ctrl_name(struct device *dev,
1394 struct device_attribute *attr, char *buf)
1395 {
1396 struct omapfb_device *fbdev = (struct omapfb_device *)dev->driver_data;
1397
1398 return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->ctrl->name);
1399 }
1400
1401 static struct device_attribute dev_attr_ctrl_name =
1402 __ATTR(name, 0444, omapfb_show_ctrl_name, NULL);
1403
1404 static struct attribute *ctrl_attrs[] = {
1405 &dev_attr_ctrl_name.attr,
1406 NULL,
1407 };
1408
1409 static struct attribute_group ctrl_attr_grp = {
1410 .name = "ctrl",
1411 .attrs = ctrl_attrs,
1412 };
1413
1414 static int omapfb_register_sysfs(struct omapfb_device *fbdev)
1415 {
1416 int r;
1417
1418 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_num)))
1419 goto fail0;
1420
1421 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_text)))
1422 goto fail1;
1423
1424 if ((r = sysfs_create_group(&fbdev->dev->kobj, &panel_attr_grp)))
1425 goto fail2;
1426
1427 if ((r = sysfs_create_group(&fbdev->dev->kobj, &ctrl_attr_grp)))
1428 goto fail3;
1429
1430 return 0;
1431 fail3:
1432 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1433 fail2:
1434 device_remove_file(fbdev->dev, &dev_attr_caps_text);
1435 fail1:
1436 device_remove_file(fbdev->dev, &dev_attr_caps_num);
1437 fail0:
1438 dev_err(fbdev->dev, "unable to register sysfs interface\n");
1439 return r;
1440 }
1441
1442 static void omapfb_unregister_sysfs(struct omapfb_device *fbdev)
1443 {
1444 sysfs_remove_group(&fbdev->dev->kobj, &ctrl_attr_grp);
1445 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1446 device_remove_file(fbdev->dev, &dev_attr_caps_num);
1447 device_remove_file(fbdev->dev, &dev_attr_caps_text);
1448 }
1449
1450 /*
1451 * ---------------------------------------------------------------------------
1452 * LDM callbacks
1453 * ---------------------------------------------------------------------------
1454 */
1455 /* Initialize system fb_info object and set the default video mode.
1456 * The frame buffer memory already allocated by lcddma_init
1457 */
1458 static int fbinfo_init(struct omapfb_device *fbdev, struct fb_info *info)
1459 {
1460 struct fb_var_screeninfo *var = &info->var;
1461 struct fb_fix_screeninfo *fix = &info->fix;
1462 int r = 0;
1463
1464 info->fbops = &omapfb_ops;
1465 info->flags = FBINFO_FLAG_DEFAULT;
1466
1467 strncpy(fix->id, MODULE_NAME, sizeof(fix->id));
1468
1469 info->pseudo_palette = fbdev->pseudo_palette;
1470
1471 var->accel_flags = def_accel ? FB_ACCELF_TEXT : 0;
1472 var->xres = def_vxres;
1473 var->yres = def_vyres;
1474 var->xres_virtual = def_vxres;
1475 var->yres_virtual = def_vyres;
1476 var->rotate = def_rotate;
1477 var->bits_per_pixel = fbdev->panel->bpp;
1478
1479 set_fb_var(info, var);
1480 set_fb_fix(info);
1481
1482 r = fb_alloc_cmap(&info->cmap, 16, 0);
1483 if (r != 0)
1484 dev_err(fbdev->dev, "unable to allocate color map memory\n");
1485
1486 return r;
1487 }
1488
1489 /* Release the fb_info object */
1490 static void fbinfo_cleanup(struct omapfb_device *fbdev, struct fb_info *fbi)
1491 {
1492 fb_dealloc_cmap(&fbi->cmap);
1493 }
1494
1495 static void planes_cleanup(struct omapfb_device *fbdev)
1496 {
1497 int i;
1498
1499 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1500 if (fbdev->fb_info[i] == NULL)
1501 break;
1502 fbinfo_cleanup(fbdev, fbdev->fb_info[i]);
1503 framebuffer_release(fbdev->fb_info[i]);
1504 }
1505 }
1506
1507 static int planes_init(struct omapfb_device *fbdev)
1508 {
1509 struct fb_info *fbi;
1510 int i;
1511 int r;
1512
1513 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1514 struct omapfb_plane_struct *plane;
1515 fbi = framebuffer_alloc(sizeof(struct omapfb_plane_struct),
1516 fbdev->dev);
1517 if (fbi == NULL) {
1518 dev_err(fbdev->dev,
1519 "unable to allocate memory for plane info\n");
1520 planes_cleanup(fbdev);
1521 return -ENOMEM;
1522 }
1523 plane = fbi->par;
1524 plane->idx = i;
1525 plane->fbdev = fbdev;
1526 plane->info.mirror = def_mirror;
1527 fbdev->fb_info[i] = fbi;
1528
1529 if ((r = fbinfo_init(fbdev, fbi)) < 0) {
1530 framebuffer_release(fbi);
1531 planes_cleanup(fbdev);
1532 return r;
1533 }
1534 plane->info.out_width = fbi->var.xres;
1535 plane->info.out_height = fbi->var.yres;
1536 }
1537 return 0;
1538 }
1539
1540 /*
1541 * Free driver resources. Can be called to rollback an aborted initialization
1542 * sequence.
1543 */
1544 static void omapfb_free_resources(struct omapfb_device *fbdev, int state)
1545 {
1546 int i;
1547
1548 switch (state) {
1549 case OMAPFB_ACTIVE:
1550 for (i = 0; i < fbdev->mem_desc.region_cnt; i++)
1551 unregister_framebuffer(fbdev->fb_info[i]);
1552 case 7:
1553 omapfb_unregister_sysfs(fbdev);
1554 case 6:
1555 fbdev->panel->disable(fbdev->panel);
1556 case 5:
1557 omapfb_set_update_mode(fbdev, OMAPFB_UPDATE_DISABLED);
1558 case 4:
1559 planes_cleanup(fbdev);
1560 case 3:
1561 ctrl_cleanup(fbdev);
1562 case 2:
1563 fbdev->panel->cleanup(fbdev->panel);
1564 case 1:
1565 dev_set_drvdata(fbdev->dev, NULL);
1566 kfree(fbdev);
1567 case 0:
1568 /* nothing to free */
1569 break;
1570 default:
1571 BUG();
1572 }
1573 }
1574
1575 static int omapfb_find_ctrl(struct omapfb_device *fbdev)
1576 {
1577 struct omapfb_platform_data *conf;
1578 char name[17];
1579 int i;
1580
1581 conf = fbdev->dev->platform_data;
1582
1583 fbdev->ctrl = NULL;
1584
1585 strncpy(name, conf->lcd.ctrl_name, sizeof(name) - 1);
1586 name[sizeof(name) - 1] = '\0';
1587
1588 if (strcmp(name, "internal") == 0) {
1589 fbdev->ctrl = fbdev->int_ctrl;
1590 return 0;
1591 }
1592
1593 for (i = 0; i < ARRAY_SIZE(ctrls); i++) {
1594 dev_dbg(fbdev->dev, "ctrl %s\n", ctrls[i]->name);
1595 if (strcmp(ctrls[i]->name, name) == 0) {
1596 fbdev->ctrl = ctrls[i];
1597 break;
1598 }
1599 }
1600
1601 if (fbdev->ctrl == NULL) {
1602 dev_dbg(fbdev->dev, "ctrl %s not supported\n", name);
1603 return -1;
1604 }
1605
1606 return 0;
1607 }
1608
1609 static void check_required_callbacks(struct omapfb_device *fbdev)
1610 {
1611 #define _C(x) (fbdev->ctrl->x != NULL)
1612 #define _P(x) (fbdev->panel->x != NULL)
1613 BUG_ON(fbdev->ctrl == NULL || fbdev->panel == NULL);
1614 BUG_ON(!(_C(init) && _C(cleanup) && _C(get_caps) &&
1615 _C(set_update_mode) && _C(setup_plane) && _C(enable_plane) &&
1616 _P(init) && _P(cleanup) && _P(enable) && _P(disable) &&
1617 _P(get_caps)));
1618 #undef _P
1619 #undef _C
1620 }
1621
1622 /*
1623 * Called by LDM binding to probe and attach a new device.
1624 * Initialization sequence:
1625 * 1. allocate system omapfb_device structure
1626 * 2. select controller type according to platform configuration
1627 * init LCD panel
1628 * 3. init LCD controller and LCD DMA
1629 * 4. init system fb_info structure for all planes
1630 * 5. setup video mode for first plane and enable it
1631 * 6. enable LCD panel
1632 * 7. register sysfs attributes
1633 * OMAPFB_ACTIVE: register system fb_info structure for all planes
1634 */
1635 static int omapfb_do_probe(struct platform_device *pdev,
1636 struct lcd_panel *panel)
1637 {
1638 struct omapfb_device *fbdev = NULL;
1639 int init_state;
1640 unsigned long phz, hhz, vhz;
1641 unsigned long vram;
1642 int i;
1643 int r = 0;
1644
1645 init_state = 0;
1646
1647 if (pdev->num_resources != 0) {
1648 dev_err(&pdev->dev, "probed for an unknown device\n");
1649 r = -ENODEV;
1650 goto cleanup;
1651 }
1652
1653 if (pdev->dev.platform_data == NULL) {
1654 dev_err(&pdev->dev, "missing platform data\n");
1655 r = -ENOENT;
1656 goto cleanup;
1657 }
1658
1659 fbdev = kzalloc(sizeof(struct omapfb_device), GFP_KERNEL);
1660 if (fbdev == NULL) {
1661 dev_err(&pdev->dev,
1662 "unable to allocate memory for device info\n");
1663 r = -ENOMEM;
1664 goto cleanup;
1665 }
1666 init_state++;
1667
1668 fbdev->dev = &pdev->dev;
1669 fbdev->panel = panel;
1670 platform_set_drvdata(pdev, fbdev);
1671
1672 mutex_init(&fbdev->rqueue_mutex);
1673
1674 #ifdef CONFIG_ARCH_OMAP1
1675 fbdev->int_ctrl = &omap1_int_ctrl;
1676 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
1677 fbdev->ext_if = &omap1_ext_if;
1678 #endif
1679 #else /* OMAP2 */
1680 fbdev->int_ctrl = &omap2_int_ctrl;
1681 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
1682 fbdev->ext_if = &omap2_ext_if;
1683 #endif
1684 #endif
1685 if (omapfb_find_ctrl(fbdev) < 0) {
1686 dev_err(fbdev->dev,
1687 "LCD controller not found, board not supported\n");
1688 r = -ENODEV;
1689 goto cleanup;
1690 }
1691
1692 r = fbdev->panel->init(fbdev->panel, fbdev);
1693 if (r)
1694 goto cleanup;
1695
1696 pr_info("omapfb: configured for panel %s\n", fbdev->panel->name);
1697
1698 def_vxres = def_vxres ? : fbdev->panel->x_res;
1699 def_vyres = def_vyres ? : fbdev->panel->y_res;
1700
1701 init_state++;
1702
1703 r = ctrl_init(fbdev);
1704 if (r)
1705 goto cleanup;
1706 if (fbdev->ctrl->mmap != NULL)
1707 omapfb_ops.fb_mmap = omapfb_mmap;
1708 init_state++;
1709
1710 check_required_callbacks(fbdev);
1711
1712 r = planes_init(fbdev);
1713 if (r)
1714 goto cleanup;
1715 init_state++;
1716
1717 #ifdef CONFIG_FB_OMAP_DMA_TUNE
1718 /* Set DMA priority for EMIFF access to highest */
1719 if (cpu_class_is_omap1())
1720 omap_set_dma_priority(0, OMAP_DMA_PORT_EMIFF, 15);
1721 #endif
1722
1723 r = ctrl_change_mode(fbdev->fb_info[0]);
1724 if (r) {
1725 dev_err(fbdev->dev, "mode setting failed\n");
1726 goto cleanup;
1727 }
1728
1729 /* GFX plane is enabled by default */
1730 r = fbdev->ctrl->enable_plane(OMAPFB_PLANE_GFX, 1);
1731 if (r)
1732 goto cleanup;
1733
1734 omapfb_set_update_mode(fbdev, manual_update ?
1735 OMAPFB_MANUAL_UPDATE : OMAPFB_AUTO_UPDATE);
1736 init_state++;
1737
1738 r = fbdev->panel->enable(fbdev->panel);
1739 if (r)
1740 goto cleanup;
1741 init_state++;
1742
1743 r = omapfb_register_sysfs(fbdev);
1744 if (r)
1745 goto cleanup;
1746 init_state++;
1747
1748 vram = 0;
1749 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1750 r = register_framebuffer(fbdev->fb_info[i]);
1751 if (r != 0) {
1752 dev_err(fbdev->dev,
1753 "registering framebuffer %d failed\n", i);
1754 goto cleanup;
1755 }
1756 vram += fbdev->mem_desc.region[i].size;
1757 }
1758
1759 fbdev->state = OMAPFB_ACTIVE;
1760
1761 panel = fbdev->panel;
1762 phz = panel->pixel_clock * 1000;
1763 hhz = phz * 10 / (panel->hfp + panel->x_res + panel->hbp + panel->hsw);
1764 vhz = hhz / (panel->vfp + panel->y_res + panel->vbp + panel->vsw);
1765
1766 omapfb_dev = fbdev;
1767
1768 pr_info("omapfb: Framebuffer initialized. Total vram %lu planes %d\n",
1769 vram, fbdev->mem_desc.region_cnt);
1770 pr_info("omapfb: Pixclock %lu kHz hfreq %lu.%lu kHz "
1771 "vfreq %lu.%lu Hz\n",
1772 phz / 1000, hhz / 10000, hhz % 10, vhz / 10, vhz % 10);
1773
1774 return 0;
1775
1776 cleanup:
1777 omapfb_free_resources(fbdev, init_state);
1778
1779 return r;
1780 }
1781
1782 static int omapfb_probe(struct platform_device *pdev)
1783 {
1784 BUG_ON(fbdev_pdev != NULL);
1785
1786 /* Delay actual initialization until the LCD is registered */
1787 fbdev_pdev = pdev;
1788 if (fbdev_panel != NULL)
1789 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1790 return 0;
1791 }
1792
1793 void omapfb_register_panel(struct lcd_panel *panel)
1794 {
1795 BUG_ON(fbdev_panel != NULL);
1796
1797 fbdev_panel = panel;
1798 if (fbdev_pdev != NULL)
1799 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1800 }
1801
1802 /* Called when the device is being detached from the driver */
1803 static int omapfb_remove(struct platform_device *pdev)
1804 {
1805 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1806 enum omapfb_state saved_state = fbdev->state;
1807
1808 /* FIXME: wait till completion of pending events */
1809
1810 fbdev->state = OMAPFB_DISABLED;
1811 omapfb_free_resources(fbdev, saved_state);
1812
1813 return 0;
1814 }
1815
1816 /* PM suspend */
1817 static int omapfb_suspend(struct platform_device *pdev, pm_message_t mesg)
1818 {
1819 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1820
1821 omapfb_blank(VESA_POWERDOWN, fbdev->fb_info[0]);
1822
1823 return 0;
1824 }
1825
1826 /* PM resume */
1827 static int omapfb_resume(struct platform_device *pdev)
1828 {
1829 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1830
1831 omapfb_blank(VESA_NO_BLANKING, fbdev->fb_info[0]);
1832 return 0;
1833 }
1834
1835 static struct platform_driver omapfb_driver = {
1836 .probe = omapfb_probe,
1837 .remove = omapfb_remove,
1838 .suspend = omapfb_suspend,
1839 .resume = omapfb_resume,
1840 .driver = {
1841 .name = MODULE_NAME,
1842 .owner = THIS_MODULE,
1843 },
1844 };
1845
1846 #ifndef MODULE
1847
1848 /* Process kernel command line parameters */
1849 static int __init omapfb_setup(char *options)
1850 {
1851 char *this_opt = NULL;
1852 int r = 0;
1853
1854 pr_debug("omapfb: options %s\n", options);
1855
1856 if (!options || !*options)
1857 return 0;
1858
1859 while (!r && (this_opt = strsep(&options, ",")) != NULL) {
1860 if (!strncmp(this_opt, "accel", 5))
1861 def_accel = 1;
1862 else if (!strncmp(this_opt, "vram:", 5)) {
1863 char *suffix;
1864 unsigned long vram;
1865 vram = (simple_strtoul(this_opt + 5, &suffix, 0));
1866 switch (suffix[0]) {
1867 case '\0':
1868 break;
1869 case 'm':
1870 case 'M':
1871 vram *= 1024;
1872 /* Fall through */
1873 case 'k':
1874 case 'K':
1875 vram *= 1024;
1876 break;
1877 default:
1878 pr_debug("omapfb: invalid vram suffix %c\n",
1879 suffix[0]);
1880 r = -1;
1881 }
1882 def_vram[def_vram_cnt++] = vram;
1883 }
1884 else if (!strncmp(this_opt, "vxres:", 6))
1885 def_vxres = simple_strtoul(this_opt + 6, NULL, 0);
1886 else if (!strncmp(this_opt, "vyres:", 6))
1887 def_vyres = simple_strtoul(this_opt + 6, NULL, 0);
1888 else if (!strncmp(this_opt, "rotate:", 7))
1889 def_rotate = (simple_strtoul(this_opt + 7, NULL, 0));
1890 else if (!strncmp(this_opt, "mirror:", 7))
1891 def_mirror = (simple_strtoul(this_opt + 7, NULL, 0));
1892 else if (!strncmp(this_opt, "manual_update", 13))
1893 manual_update = 1;
1894 else {
1895 pr_debug("omapfb: invalid option\n");
1896 r = -1;
1897 }
1898 }
1899
1900 return r;
1901 }
1902
1903 #endif
1904
1905 /* Register both the driver and the device */
1906 static int __init omapfb_init(void)
1907 {
1908 #ifndef MODULE
1909 char *option;
1910
1911 if (fb_get_options("omapfb", &option))
1912 return -ENODEV;
1913 omapfb_setup(option);
1914 #endif
1915 /* Register the driver with LDM */
1916 if (platform_driver_register(&omapfb_driver)) {
1917 pr_debug("failed to register omapfb driver\n");
1918 return -ENODEV;
1919 }
1920
1921 return 0;
1922 }
1923
1924 static void __exit omapfb_cleanup(void)
1925 {
1926 platform_driver_unregister(&omapfb_driver);
1927 }
1928
1929 module_param_named(accel, def_accel, uint, 0664);
1930 module_param_array_named(vram, def_vram, ulong, &def_vram_cnt, 0664);
1931 module_param_named(vxres, def_vxres, long, 0664);
1932 module_param_named(vyres, def_vyres, long, 0664);
1933 module_param_named(rotate, def_rotate, uint, 0664);
1934 module_param_named(mirror, def_mirror, uint, 0664);
1935 module_param_named(manual_update, manual_update, bool, 0664);
1936
1937 module_init(omapfb_init);
1938 module_exit(omapfb_cleanup);
1939
1940 MODULE_DESCRIPTION("TI OMAP framebuffer driver");
1941 MODULE_AUTHOR("Imre Deak <imre.deak@nokia.com>");
1942 MODULE_LICENSE("GPL");
Nao low-level kernelspace/userspace library that runs on our robots, Nao-Team HTWK