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fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / drivers / video / omap / omapfb_main.c
blob14d0f7a1114587fd3496918a8495b636d9152059
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/uaccess.h>
29
30 #include <asm/mach-types.h>
31 #include <asm/arch/dma.h>
32 #include <asm/arch/omapfb.h>
33
34 #define MODULE_NAME "omapfb"
35
36 static unsigned int def_accel;
37 static unsigned long def_vram[OMAPFB_PLANE_NUM];
38 static int def_vram_cnt;
39 static unsigned long def_vxres;
40 static unsigned long def_vyres;
41 static unsigned int def_rotate;
42 static unsigned int def_mirror;
43
44 #ifdef CONFIG_FB_OMAP_MANUAL_UPDATE
45 static int manual_update = 1;
46 #else
47 static int manual_update;
48 #endif
49
50 static struct platform_device *fbdev_pdev;
51 static struct lcd_panel *fbdev_panel;
52 static struct omapfb_device *omapfb_dev;
53
54 struct caps_table_struct {
55 unsigned long flag;
56 const char *name;
57 };
58
59 static struct caps_table_struct ctrl_caps[] = {
60 { OMAPFB_CAPS_MANUAL_UPDATE, "manual update" },
61 { OMAPFB_CAPS_TEARSYNC, "tearing synchronization" },
62 { OMAPFB_CAPS_PLANE_RELOCATE_MEM, "relocate plane memory" },
63 { OMAPFB_CAPS_PLANE_SCALE, "scale plane" },
64 { OMAPFB_CAPS_WINDOW_PIXEL_DOUBLE, "pixel double window" },
65 { OMAPFB_CAPS_WINDOW_SCALE, "scale window" },
66 { OMAPFB_CAPS_WINDOW_OVERLAY, "overlay window" },
67 { OMAPFB_CAPS_SET_BACKLIGHT, "backlight setting" },
68 };
69
70 static struct caps_table_struct color_caps[] = {
71 { 1 << OMAPFB_COLOR_RGB565, "RGB565", },
72 { 1 << OMAPFB_COLOR_YUV422, "YUV422", },
73 { 1 << OMAPFB_COLOR_YUV420, "YUV420", },
74 { 1 << OMAPFB_COLOR_CLUT_8BPP, "CLUT8", },
75 { 1 << OMAPFB_COLOR_CLUT_4BPP, "CLUT4", },
76 { 1 << OMAPFB_COLOR_CLUT_2BPP, "CLUT2", },
77 { 1 << OMAPFB_COLOR_CLUT_1BPP, "CLUT1", },
78 { 1 << OMAPFB_COLOR_RGB444, "RGB444", },
79 { 1 << OMAPFB_COLOR_YUY422, "YUY422", },
80 };
81
82 /*
83 * ---------------------------------------------------------------------------
84 * LCD panel
85 * ---------------------------------------------------------------------------
86 */
87 extern struct lcd_ctrl omap1_int_ctrl;
88 extern struct lcd_ctrl omap2_int_ctrl;
89 extern struct lcd_ctrl hwa742_ctrl;
90 extern struct lcd_ctrl blizzard_ctrl;
91
92 static struct lcd_ctrl *ctrls[] = {
93 #ifdef CONFIG_ARCH_OMAP1
94 &omap1_int_ctrl,
95 #else
96 &omap2_int_ctrl,
97 #endif
98
99 #ifdef CONFIG_FB_OMAP_LCDC_HWA742
100 &hwa742_ctrl,
101 #endif
102 #ifdef CONFIG_FB_OMAP_LCDC_BLIZZARD
103 &blizzard_ctrl,
104 #endif
105 };
106
107 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
108 #ifdef CONFIG_ARCH_OMAP1
109 extern struct lcd_ctrl_extif omap1_ext_if;
110 #else
111 extern struct lcd_ctrl_extif omap2_ext_if;
112 #endif
113 #endif
114
115 static void omapfb_rqueue_lock(struct omapfb_device *fbdev)
116 {
117 mutex_lock(&fbdev->rqueue_mutex);
118 }
119
120 static void omapfb_rqueue_unlock(struct omapfb_device *fbdev)
121 {
122 mutex_unlock(&fbdev->rqueue_mutex);
123 }
124
125 /*
126 * ---------------------------------------------------------------------------
127 * LCD controller and LCD DMA
128 * ---------------------------------------------------------------------------
129 */
130 /* Lookup table to map elem size to elem type. */
131 static const int dma_elem_type[] = {
132 0,
133 OMAP_DMA_DATA_TYPE_S8,
134 OMAP_DMA_DATA_TYPE_S16,
135 0,
136 OMAP_DMA_DATA_TYPE_S32,
137 };
138
139 /*
140 * Allocate resources needed for LCD controller and LCD DMA operations. Video
141 * memory is allocated from system memory according to the virtual display
142 * size, except if a bigger memory size is specified explicitly as a kernel
143 * parameter.
144 */
145 static int ctrl_init(struct omapfb_device *fbdev)
146 {
147 int r;
148 int i;
149
150 /* kernel/module vram parameters override boot tags/board config */
151 if (def_vram_cnt) {
152 for (i = 0; i < def_vram_cnt; i++)
153 fbdev->mem_desc.region[i].size =
154 PAGE_ALIGN(def_vram[i]);
155 fbdev->mem_desc.region_cnt = i;
156 } else {
157 struct omapfb_platform_data *conf;
158
159 conf = fbdev->dev->platform_data;
160 fbdev->mem_desc = conf->mem_desc;
161 }
162
163 if (!fbdev->mem_desc.region_cnt) {
164 struct lcd_panel *panel = fbdev->panel;
165 int def_size;
166 int bpp = panel->bpp;
167
168 /* 12 bpp is packed in 16 bits */
169 if (bpp == 12)
170 bpp = 16;
171 def_size = def_vxres * def_vyres * bpp / 8;
172 fbdev->mem_desc.region_cnt = 1;
173 fbdev->mem_desc.region[0].size = PAGE_ALIGN(def_size);
174 }
175 r = fbdev->ctrl->init(fbdev, 0, &fbdev->mem_desc);
176 if (r < 0) {
177 dev_err(fbdev->dev, "controller initialization failed (%d)\n",
178 r);
179 return r;
180 }
181
182 #ifdef DEBUG
183 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
184 dev_dbg(fbdev->dev, "region%d phys %08x virt %p size=%lu\n",
185 i,
186 fbdev->mem_desc.region[i].paddr,
187 fbdev->mem_desc.region[i].vaddr,
188 fbdev->mem_desc.region[i].size);
189 }
190 #endif
191 return 0;
192 }
193
194 static void ctrl_cleanup(struct omapfb_device *fbdev)
195 {
196 fbdev->ctrl->cleanup();
197 }
198
199 /* Must be called with fbdev->rqueue_mutex held. */
200 static int ctrl_change_mode(struct fb_info *fbi)
201 {
202 int r;
203 unsigned long offset;
204 struct omapfb_plane_struct *plane = fbi->par;
205 struct omapfb_device *fbdev = plane->fbdev;
206 struct fb_var_screeninfo *var = &fbi->var;
207
208 offset = var->yoffset * fbi->fix.line_length +
209 var->xoffset * var->bits_per_pixel / 8;
210
211 if (fbdev->ctrl->sync)
212 fbdev->ctrl->sync();
213 r = fbdev->ctrl->setup_plane(plane->idx, plane->info.channel_out,
214 offset, var->xres_virtual,
215 plane->info.pos_x, plane->info.pos_y,
216 var->xres, var->yres, plane->color_mode);
217 if (fbdev->ctrl->set_scale != NULL)
218 r = fbdev->ctrl->set_scale(plane->idx,
219 var->xres, var->yres,
220 plane->info.out_width,
221 plane->info.out_height);
222
223 return r;
224 }
225
226 /*
227 * ---------------------------------------------------------------------------
228 * fbdev framework callbacks and the ioctl interface
229 * ---------------------------------------------------------------------------
230 */
231 /* Called each time the omapfb device is opened */
232 static int omapfb_open(struct fb_info *info, int user)
233 {
234 return 0;
235 }
236
237 static void omapfb_sync(struct fb_info *info);
238
239 /* Called when the omapfb device is closed. We make sure that any pending
240 * gfx DMA operations are ended, before we return. */
241 static int omapfb_release(struct fb_info *info, int user)
242 {
243 omapfb_sync(info);
244 return 0;
245 }
246
247 /* Store a single color palette entry into a pseudo palette or the hardware
248 * palette if one is available. For now we support only 16bpp and thus store
249 * the entry only to the pseudo palette.
250 */
251 static int _setcolreg(struct fb_info *info, u_int regno, u_int red, u_int green,
252 u_int blue, u_int transp, int update_hw_pal)
253 {
254 struct omapfb_plane_struct *plane = info->par;
255 struct omapfb_device *fbdev = plane->fbdev;
256 struct fb_var_screeninfo *var = &info->var;
257 int r = 0;
258
259 switch (plane->color_mode) {
260 case OMAPFB_COLOR_YUV422:
261 case OMAPFB_COLOR_YUV420:
262 case OMAPFB_COLOR_YUY422:
263 r = -EINVAL;
264 break;
265 case OMAPFB_COLOR_CLUT_8BPP:
266 case OMAPFB_COLOR_CLUT_4BPP:
267 case OMAPFB_COLOR_CLUT_2BPP:
268 case OMAPFB_COLOR_CLUT_1BPP:
269 if (fbdev->ctrl->setcolreg)
270 r = fbdev->ctrl->setcolreg(regno, red, green, blue,
271 transp, update_hw_pal);
272 /* Fallthrough */
273 case OMAPFB_COLOR_RGB565:
274 case OMAPFB_COLOR_RGB444:
275 if (r != 0)
276 break;
277
278 if (regno < 0) {
279 r = -EINVAL;
280 break;
281 }
282
283 if (regno < 16) {
284 u16 pal;
285 pal = ((red >> (16 - var->red.length)) <<
286 var->red.offset) |
287 ((green >> (16 - var->green.length)) <<
288 var->green.offset) |
289 (blue >> (16 - var->blue.length));
290 ((u32 *)(info->pseudo_palette))[regno] = pal;
291 }
292 break;
293 default:
294 BUG();
295 }
296 return r;
297 }
298
299 static int omapfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
300 u_int transp, struct fb_info *info)
301 {
302 return _setcolreg(info, regno, red, green, blue, transp, 1);
303 }
304
305 static int omapfb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
306 {
307 int count, index, r;
308 u16 *red, *green, *blue, *transp;
309 u16 trans = 0xffff;
310
311 red = cmap->red;
312 green = cmap->green;
313 blue = cmap->blue;
314 transp = cmap->transp;
315 index = cmap->start;
316
317 for (count = 0; count < cmap->len; count++) {
318 if (transp)
319 trans = *transp++;
320 r = _setcolreg(info, index++, *red++, *green++, *blue++, trans,
321 count == cmap->len - 1);
322 if (r != 0)
323 return r;
324 }
325
326 return 0;
327 }
328
329 static int omapfb_update_full_screen(struct fb_info *fbi);
330
331 static int omapfb_blank(int blank, struct fb_info *fbi)
332 {
333 struct omapfb_plane_struct *plane = fbi->par;
334 struct omapfb_device *fbdev = plane->fbdev;
335 int do_update = 0;
336 int r = 0;
337
338 omapfb_rqueue_lock(fbdev);
339 switch (blank) {
340 case VESA_NO_BLANKING:
341 if (fbdev->state == OMAPFB_SUSPENDED) {
342 if (fbdev->ctrl->resume)
343 fbdev->ctrl->resume();
344 fbdev->panel->enable(fbdev->panel);
345 fbdev->state = OMAPFB_ACTIVE;
346 if (fbdev->ctrl->get_update_mode() ==
347 OMAPFB_MANUAL_UPDATE)
348 do_update = 1;
349 }
350 break;
351 case VESA_POWERDOWN:
352 if (fbdev->state == OMAPFB_ACTIVE) {
353 fbdev->panel->disable(fbdev->panel);
354 if (fbdev->ctrl->suspend)
355 fbdev->ctrl->suspend();
356 fbdev->state = OMAPFB_SUSPENDED;
357 }
358 break;
359 default:
360 r = -EINVAL;
361 }
362 omapfb_rqueue_unlock(fbdev);
363
364 if (r == 0 && do_update)
365 r = omapfb_update_full_screen(fbi);
366
367 return r;
368 }
369
370 static void omapfb_sync(struct fb_info *fbi)
371 {
372 struct omapfb_plane_struct *plane = fbi->par;
373 struct omapfb_device *fbdev = plane->fbdev;
374
375 omapfb_rqueue_lock(fbdev);
376 if (fbdev->ctrl->sync)
377 fbdev->ctrl->sync();
378 omapfb_rqueue_unlock(fbdev);
379 }
380
381 /*
382 * Set fb_info.fix fields and also updates fbdev.
383 * When calling this fb_info.var must be set up already.
384 */
385 static void set_fb_fix(struct fb_info *fbi)
386 {
387 struct fb_fix_screeninfo *fix = &fbi->fix;
388 struct fb_var_screeninfo *var = &fbi->var;
389 struct omapfb_plane_struct *plane = fbi->par;
390 struct omapfb_mem_region *rg;
391 int bpp;
392
393 rg = &plane->fbdev->mem_desc.region[plane->idx];
394 fbi->screen_base = (char __iomem *)rg->vaddr;
395 fix->smem_start = rg->paddr;
396 fix->smem_len = rg->size;
397
398 fix->type = FB_TYPE_PACKED_PIXELS;
399 bpp = var->bits_per_pixel;
400 if (var->nonstd)
401 fix->visual = FB_VISUAL_PSEUDOCOLOR;
402 else switch (var->bits_per_pixel) {
403 case 16:
404 case 12:
405 fix->visual = FB_VISUAL_TRUECOLOR;
406 /* 12bpp is stored in 16 bits */
407 bpp = 16;
408 break;
409 case 1:
410 case 2:
411 case 4:
412 case 8:
413 fix->visual = FB_VISUAL_PSEUDOCOLOR;
414 break;
415 }
416 fix->accel = FB_ACCEL_OMAP1610;
417 fix->line_length = var->xres_virtual * bpp / 8;
418 }
419
420 static int set_color_mode(struct omapfb_plane_struct *plane,
421 struct fb_var_screeninfo *var)
422 {
423 switch (var->nonstd) {
424 case 0:
425 break;
426 case OMAPFB_COLOR_YUV422:
427 var->bits_per_pixel = 16;
428 plane->color_mode = var->nonstd;
429 return 0;
430 case OMAPFB_COLOR_YUV420:
431 var->bits_per_pixel = 12;
432 plane->color_mode = var->nonstd;
433 return 0;
434 case OMAPFB_COLOR_YUY422:
435 var->bits_per_pixel = 16;
436 plane->color_mode = var->nonstd;
437 return 0;
438 default:
439 return -EINVAL;
440 }
441
442 switch (var->bits_per_pixel) {
443 case 1:
444 plane->color_mode = OMAPFB_COLOR_CLUT_1BPP;
445 return 0;
446 case 2:
447 plane->color_mode = OMAPFB_COLOR_CLUT_2BPP;
448 return 0;
449 case 4:
450 plane->color_mode = OMAPFB_COLOR_CLUT_4BPP;
451 return 0;
452 case 8:
453 plane->color_mode = OMAPFB_COLOR_CLUT_8BPP;
454 return 0;
455 case 12:
456 var->bits_per_pixel = 16;
457 plane->color_mode = OMAPFB_COLOR_RGB444;
458 return 0;
459 case 16:
460 plane->color_mode = OMAPFB_COLOR_RGB565;
461 return 0;
462 default:
463 return -EINVAL;
464 }
465 }
466
467 /*
468 * Check the values in var against our capabilities and in case of out of
469 * bound values try to adjust them.
470 */
471 static int set_fb_var(struct fb_info *fbi,
472 struct fb_var_screeninfo *var)
473 {
474 int bpp;
475 unsigned long max_frame_size;
476 unsigned long line_size;
477 int xres_min, xres_max;
478 int yres_min, yres_max;
479 struct omapfb_plane_struct *plane = fbi->par;
480 struct omapfb_device *fbdev = plane->fbdev;
481 struct lcd_panel *panel = fbdev->panel;
482
483 if (set_color_mode(plane, var) < 0)
484 return -EINVAL;
485
486 bpp = var->bits_per_pixel;
487 if (plane->color_mode == OMAPFB_COLOR_RGB444)
488 bpp = 16;
489
490 switch (var->rotate) {
491 case 0:
492 case 180:
493 xres_min = OMAPFB_PLANE_XRES_MIN;
494 xres_max = panel->x_res;
495 yres_min = OMAPFB_PLANE_YRES_MIN;
496 yres_max = panel->y_res;
497 if (cpu_is_omap15xx()) {
498 var->xres = panel->x_res;
499 var->yres = panel->y_res;
500 }
501 break;
502 case 90:
503 case 270:
504 xres_min = OMAPFB_PLANE_YRES_MIN;
505 xres_max = panel->y_res;
506 yres_min = OMAPFB_PLANE_XRES_MIN;
507 yres_max = panel->x_res;
508 if (cpu_is_omap15xx()) {
509 var->xres = panel->y_res;
510 var->yres = panel->x_res;
511 }
512 break;
513 default:
514 return -EINVAL;
515 }
516
517 if (var->xres < xres_min)
518 var->xres = xres_min;
519 if (var->yres < yres_min)
520 var->yres = yres_min;
521 if (var->xres > xres_max)
522 var->xres = xres_max;
523 if (var->yres > yres_max)
524 var->yres = yres_max;
525
526 if (var->xres_virtual < var->xres)
527 var->xres_virtual = var->xres;
528 if (var->yres_virtual < var->yres)
529 var->yres_virtual = var->yres;
530 max_frame_size = fbdev->mem_desc.region[plane->idx].size;
531 line_size = var->xres_virtual * bpp / 8;
532 if (line_size * var->yres_virtual > max_frame_size) {
533 /* Try to keep yres_virtual first */
534 line_size = max_frame_size / var->yres_virtual;
535 var->xres_virtual = line_size * 8 / bpp;
536 if (var->xres_virtual < var->xres) {
537 /* Still doesn't fit. Shrink yres_virtual too */
538 var->xres_virtual = var->xres;
539 line_size = var->xres * bpp / 8;
540 var->yres_virtual = max_frame_size / line_size;
541 }
542 /* Recheck this, as the virtual size changed. */
543 if (var->xres_virtual < var->xres)
544 var->xres = var->xres_virtual;
545 if (var->yres_virtual < var->yres)
546 var->yres = var->yres_virtual;
547 if (var->xres < xres_min || var->yres < yres_min)
548 return -EINVAL;
549 }
550 if (var->xres + var->xoffset > var->xres_virtual)
551 var->xoffset = var->xres_virtual - var->xres;
552 if (var->yres + var->yoffset > var->yres_virtual)
553 var->yoffset = var->yres_virtual - var->yres;
554 line_size = var->xres * bpp / 8;
555
556 if (plane->color_mode == OMAPFB_COLOR_RGB444) {
557 var->red.offset = 8; var->red.length = 4;
558 var->red.msb_right = 0;
559 var->green.offset = 4; var->green.length = 4;
560 var->green.msb_right = 0;
561 var->blue.offset = 0; var->blue.length = 4;
562 var->blue.msb_right = 0;
563 } else {
564 var->red.offset = 11; var->red.length = 5;
565 var->red.msb_right = 0;
566 var->green.offset = 5; var->green.length = 6;
567 var->green.msb_right = 0;
568 var->blue.offset = 0; var->blue.length = 5;
569 var->blue.msb_right = 0;
570 }
571
572 var->height = -1;
573 var->width = -1;
574 var->grayscale = 0;
575
576 /* pixclock in ps, the rest in pixclock */
577 var->pixclock = 10000000 / (panel->pixel_clock / 100);
578 var->left_margin = panel->hfp;
579 var->right_margin = panel->hbp;
580 var->upper_margin = panel->vfp;
581 var->lower_margin = panel->vbp;
582 var->hsync_len = panel->hsw;
583 var->vsync_len = panel->vsw;
584
585 /* TODO: get these from panel->config */
586 var->vmode = FB_VMODE_NONINTERLACED;
587 var->sync = 0;
588
589 return 0;
590 }
591
592
593 /* Set rotation (0, 90, 180, 270 degree), and switch to the new mode. */
594 static void omapfb_rotate(struct fb_info *fbi, int rotate)
595 {
596 struct omapfb_plane_struct *plane = fbi->par;
597 struct omapfb_device *fbdev = plane->fbdev;
598
599 omapfb_rqueue_lock(fbdev);
600 if (cpu_is_omap15xx() && rotate != fbi->var.rotate) {
601 struct fb_var_screeninfo *new_var = &fbdev->new_var;
602
603 memcpy(new_var, &fbi->var, sizeof(*new_var));
604 new_var->rotate = rotate;
605 if (set_fb_var(fbi, new_var) == 0 &&
606 memcmp(new_var, &fbi->var, sizeof(*new_var))) {
607 memcpy(&fbi->var, new_var, sizeof(*new_var));
608 ctrl_change_mode(fbi);
609 }
610 }
611 omapfb_rqueue_unlock(fbdev);
612 }
613
614 /*
615 * Set new x,y offsets in the virtual display for the visible area and switch
616 * to the new mode.
617 */
618 static int omapfb_pan_display(struct fb_var_screeninfo *var,
619 struct fb_info *fbi)
620 {
621 struct omapfb_plane_struct *plane = fbi->par;
622 struct omapfb_device *fbdev = plane->fbdev;
623 int r = 0;
624
625 omapfb_rqueue_lock(fbdev);
626 if (var->xoffset != fbi->var.xoffset ||
627 var->yoffset != fbi->var.yoffset) {
628 struct fb_var_screeninfo *new_var = &fbdev->new_var;
629
630 memcpy(new_var, &fbi->var, sizeof(*new_var));
631 new_var->xoffset = var->xoffset;
632 new_var->yoffset = var->yoffset;
633 if (set_fb_var(fbi, new_var))
634 r = -EINVAL;
635 else {
636 memcpy(&fbi->var, new_var, sizeof(*new_var));
637 ctrl_change_mode(fbi);
638 }
639 }
640 omapfb_rqueue_unlock(fbdev);
641
642 return r;
643 }
644
645 /* Set mirror to vertical axis and switch to the new mode. */
646 static int omapfb_mirror(struct fb_info *fbi, int mirror)
647 {
648 struct omapfb_plane_struct *plane = fbi->par;
649 struct omapfb_device *fbdev = plane->fbdev;
650 int r = 0;
651
652 omapfb_rqueue_lock(fbdev);
653 mirror = mirror ? 1 : 0;
654 if (cpu_is_omap15xx())
655 r = -EINVAL;
656 else if (mirror != plane->info.mirror) {
657 plane->info.mirror = mirror;
658 r = ctrl_change_mode(fbi);
659 }
660 omapfb_rqueue_unlock(fbdev);
661
662 return r;
663 }
664
665 /*
666 * Check values in var, try to adjust them in case of out of bound values if
667 * possible, or return error.
668 */
669 static int omapfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
670 {
671 struct omapfb_plane_struct *plane = fbi->par;
672 struct omapfb_device *fbdev = plane->fbdev;
673 int r;
674
675 omapfb_rqueue_lock(fbdev);
676 if (fbdev->ctrl->sync != NULL)
677 fbdev->ctrl->sync();
678 r = set_fb_var(fbi, var);
679 omapfb_rqueue_unlock(fbdev);
680
681 return r;
682 }
683
684 /*
685 * Switch to a new mode. The parameters for it has been check already by
686 * omapfb_check_var.
687 */
688 static int omapfb_set_par(struct fb_info *fbi)
689 {
690 struct omapfb_plane_struct *plane = fbi->par;
691 struct omapfb_device *fbdev = plane->fbdev;
692 int r = 0;
693
694 omapfb_rqueue_lock(fbdev);
695 set_fb_fix(fbi);
696 r = ctrl_change_mode(fbi);
697 omapfb_rqueue_unlock(fbdev);
698
699 return r;
700 }
701
702 int omapfb_update_window_async(struct fb_info *fbi,
703 struct omapfb_update_window *win,
704 void (*callback)(void *),
705 void *callback_data)
706 {
707 struct omapfb_plane_struct *plane = fbi->par;
708 struct omapfb_device *fbdev = plane->fbdev;
709 struct fb_var_screeninfo *var;
710
711 var = &fbi->var;
712 if (win->x >= var->xres || win->y >= var->yres ||
713 win->out_x > var->xres || win->out_y >= var->yres)
714 return -EINVAL;
715
716 if (!fbdev->ctrl->update_window ||
717 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
718 return -ENODEV;
719
720 if (win->x + win->width >= var->xres)
721 win->width = var->xres - win->x;
722 if (win->y + win->height >= var->yres)
723 win->height = var->yres - win->y;
724 /* The out sizes should be cropped to the LCD size */
725 if (win->out_x + win->out_width > fbdev->panel->x_res)
726 win->out_width = fbdev->panel->x_res - win->out_x;
727 if (win->out_y + win->out_height > fbdev->panel->y_res)
728 win->out_height = fbdev->panel->y_res - win->out_y;
729 if (!win->width || !win->height || !win->out_width || !win->out_height)
730 return 0;
731
732 return fbdev->ctrl->update_window(fbi, win, callback, callback_data);
733 }
734 EXPORT_SYMBOL(omapfb_update_window_async);
735
736 static int omapfb_update_win(struct fb_info *fbi,
737 struct omapfb_update_window *win)
738 {
739 struct omapfb_plane_struct *plane = fbi->par;
740 int ret;
741
742 omapfb_rqueue_lock(plane->fbdev);
743 ret = omapfb_update_window_async(fbi, win, NULL, 0);
744 omapfb_rqueue_unlock(plane->fbdev);
745
746 return ret;
747 }
748
749 static int omapfb_update_full_screen(struct fb_info *fbi)
750 {
751 struct omapfb_plane_struct *plane = fbi->par;
752 struct omapfb_device *fbdev = plane->fbdev;
753 struct omapfb_update_window win;
754 int r;
755
756 if (!fbdev->ctrl->update_window ||
757 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
758 return -ENODEV;
759
760 win.x = 0;
761 win.y = 0;
762 win.width = fbi->var.xres;
763 win.height = fbi->var.yres;
764 win.out_x = 0;
765 win.out_y = 0;
766 win.out_width = fbi->var.xres;
767 win.out_height = fbi->var.yres;
768 win.format = 0;
769
770 omapfb_rqueue_lock(fbdev);
771 r = fbdev->ctrl->update_window(fbi, &win, NULL, 0);
772 omapfb_rqueue_unlock(fbdev);
773
774 return r;
775 }
776
777 static int omapfb_setup_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
778 {
779 struct omapfb_plane_struct *plane = fbi->par;
780 struct omapfb_device *fbdev = plane->fbdev;
781 struct lcd_panel *panel = fbdev->panel;
782 struct omapfb_plane_info old_info;
783 int r = 0;
784
785 if (pi->pos_x + pi->out_width > panel->x_res ||
786 pi->pos_y + pi->out_height > panel->y_res)
787 return -EINVAL;
788
789 omapfb_rqueue_lock(fbdev);
790 if (pi->enabled && !fbdev->mem_desc.region[plane->idx].size) {
791 /*
792 * This plane's memory was freed, can't enable it
793 * until it's reallocated.
794 */
795 r = -EINVAL;
796 goto out;
797 }
798 old_info = plane->info;
799 plane->info = *pi;
800 if (pi->enabled) {
801 r = ctrl_change_mode(fbi);
802 if (r < 0) {
803 plane->info = old_info;
804 goto out;
805 }
806 }
807 r = fbdev->ctrl->enable_plane(plane->idx, pi->enabled);
808 if (r < 0) {
809 plane->info = old_info;
810 goto out;
811 }
812 out:
813 omapfb_rqueue_unlock(fbdev);
814 return r;
815 }
816
817 static int omapfb_query_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
818 {
819 struct omapfb_plane_struct *plane = fbi->par;
820
821 *pi = plane->info;
822 return 0;
823 }
824
825 static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
826 {
827 struct omapfb_plane_struct *plane = fbi->par;
828 struct omapfb_device *fbdev = plane->fbdev;
829 struct omapfb_mem_region *rg = &fbdev->mem_desc.region[plane->idx];
830 size_t size;
831 int r = 0;
832
833 if (fbdev->ctrl->setup_mem == NULL)
834 return -ENODEV;
835 if (mi->type > OMAPFB_MEMTYPE_MAX)
836 return -EINVAL;
837
838 size = PAGE_ALIGN(mi->size);
839 omapfb_rqueue_lock(fbdev);
840 if (plane->info.enabled) {
841 r = -EBUSY;
842 goto out;
843 }
844 if (rg->size != size || rg->type != mi->type) {
845 struct fb_var_screeninfo *new_var = &fbdev->new_var;
846 unsigned long old_size = rg->size;
847 u8 old_type = rg->type;
848 unsigned long paddr;
849
850 rg->size = size;
851 rg->type = mi->type;
852 /*
853 * size == 0 is a special case, for which we
854 * don't check / adjust the screen parameters.
855 * This isn't a problem since the plane can't
856 * be reenabled unless its size is > 0.
857 */
858 if (old_size != size && size) {
859 if (size) {
860 memcpy(new_var, &fbi->var, sizeof(*new_var));
861 r = set_fb_var(fbi, new_var);
862 if (r < 0)
863 goto out;
864 }
865 }
866
867 if (fbdev->ctrl->sync)
868 fbdev->ctrl->sync();
869 r = fbdev->ctrl->setup_mem(plane->idx, size, mi->type, &paddr);
870 if (r < 0) {
871 /* Revert changes. */
872 rg->size = old_size;
873 rg->type = old_type;
874 goto out;
875 }
876 rg->paddr = paddr;
877
878 if (old_size != size) {
879 if (size) {
880 memcpy(&fbi->var, new_var, sizeof(fbi->var));
881 set_fb_fix(fbi);
882 } else {
883 /*
884 * Set these explicitly to indicate that the
885 * plane memory is dealloce'd, the other
886 * screen parameters in var / fix are invalid.
887 */
888 fbi->fix.smem_start = 0;
889 fbi->fix.smem_len = 0;
890 }
891 }
892 }
893 out:
894 omapfb_rqueue_unlock(fbdev);
895
896 return r;
897 }
898
899 static int omapfb_query_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
900 {
901 struct omapfb_plane_struct *plane = fbi->par;
902 struct omapfb_device *fbdev = plane->fbdev;
903 struct omapfb_mem_region *rg;
904
905 rg = &fbdev->mem_desc.region[plane->idx];
906 memset(mi, 0, sizeof(*mi));
907 mi->size = rg->size;
908 mi->type = rg->type;
909
910 return 0;
911 }
912
913 static int omapfb_set_color_key(struct omapfb_device *fbdev,
914 struct omapfb_color_key *ck)
915 {
916 int r;
917
918 if (!fbdev->ctrl->set_color_key)
919 return -ENODEV;
920
921 omapfb_rqueue_lock(fbdev);
922 r = fbdev->ctrl->set_color_key(ck);
923 omapfb_rqueue_unlock(fbdev);
924
925 return r;
926 }
927
928 static int omapfb_get_color_key(struct omapfb_device *fbdev,
929 struct omapfb_color_key *ck)
930 {
931 int r;
932
933 if (!fbdev->ctrl->get_color_key)
934 return -ENODEV;
935
936 omapfb_rqueue_lock(fbdev);
937 r = fbdev->ctrl->get_color_key(ck);
938 omapfb_rqueue_unlock(fbdev);
939
940 return r;
941 }
942
943 static struct blocking_notifier_head omapfb_client_list[OMAPFB_PLANE_NUM];
944 static int notifier_inited;
945
946 static void omapfb_init_notifier(void)
947 {
948 int i;
949
950 for (i = 0; i < OMAPFB_PLANE_NUM; i++)
951 BLOCKING_INIT_NOTIFIER_HEAD(&omapfb_client_list[i]);
952 }
953
954 int omapfb_register_client(struct omapfb_notifier_block *omapfb_nb,
955 omapfb_notifier_callback_t callback,
956 void *callback_data)
957 {
958 int r;
959
960 if ((unsigned)omapfb_nb->plane_idx > OMAPFB_PLANE_NUM)
961 return -EINVAL;
962
963 if (!notifier_inited) {
964 omapfb_init_notifier();
965 notifier_inited = 1;
966 }
967
968 omapfb_nb->nb.notifier_call = (int (*)(struct notifier_block *,
969 unsigned long, void *))callback;
970 omapfb_nb->data = callback_data;
971 r = blocking_notifier_chain_register(
972 &omapfb_client_list[omapfb_nb->plane_idx],
973 &omapfb_nb->nb);
974 if (r)
975 return r;
976 if (omapfb_dev != NULL &&
977 omapfb_dev->ctrl && omapfb_dev->ctrl->bind_client) {
978 omapfb_dev->ctrl->bind_client(omapfb_nb);
979 }
980
981 return 0;
982 }
983 EXPORT_SYMBOL(omapfb_register_client);
984
985 int omapfb_unregister_client(struct omapfb_notifier_block *omapfb_nb)
986 {
987 return blocking_notifier_chain_unregister(
988 &omapfb_client_list[omapfb_nb->plane_idx], &omapfb_nb->nb);
989 }
990 EXPORT_SYMBOL(omapfb_unregister_client);
991
992 void omapfb_notify_clients(struct omapfb_device *fbdev, unsigned long event)
993 {
994 int i;
995
996 if (!notifier_inited)
997 /* no client registered yet */
998 return;
999
1000 for (i = 0; i < OMAPFB_PLANE_NUM; i++)
1001 blocking_notifier_call_chain(&omapfb_client_list[i], event,
1002 fbdev->fb_info[i]);
1003 }
1004 EXPORT_SYMBOL(omapfb_notify_clients);
1005
1006 static int omapfb_set_update_mode(struct omapfb_device *fbdev,
1007 enum omapfb_update_mode mode)
1008 {
1009 int r;
1010
1011 omapfb_rqueue_lock(fbdev);
1012 r = fbdev->ctrl->set_update_mode(mode);
1013 omapfb_rqueue_unlock(fbdev);
1014
1015 return r;
1016 }
1017
1018 static enum omapfb_update_mode omapfb_get_update_mode(struct omapfb_device *fbdev)
1019 {
1020 int r;
1021
1022 omapfb_rqueue_lock(fbdev);
1023 r = fbdev->ctrl->get_update_mode();
1024 omapfb_rqueue_unlock(fbdev);
1025
1026 return r;
1027 }
1028
1029 static void omapfb_get_caps(struct omapfb_device *fbdev, int plane,
1030 struct omapfb_caps *caps)
1031 {
1032 memset(caps, 0, sizeof(*caps));
1033 fbdev->ctrl->get_caps(plane, caps);
1034 caps->ctrl |= fbdev->panel->get_caps(fbdev->panel);
1035 }
1036
1037 /* For lcd testing */
1038 void omapfb_write_first_pixel(struct omapfb_device *fbdev, u16 pixval)
1039 {
1040 omapfb_rqueue_lock(fbdev);
1041 *(u16 *)fbdev->mem_desc.region[0].vaddr = pixval;
1042 if (fbdev->ctrl->get_update_mode() == OMAPFB_MANUAL_UPDATE) {
1043 struct omapfb_update_window win;
1044
1045 memset(&win, 0, sizeof(win));
1046 win.width = 2;
1047 win.height = 2;
1048 win.out_width = 2;
1049 win.out_height = 2;
1050 fbdev->ctrl->update_window(fbdev->fb_info[0], &win, NULL, 0);
1051 }
1052 omapfb_rqueue_unlock(fbdev);
1053 }
1054 EXPORT_SYMBOL(omapfb_write_first_pixel);
1055
1056 /*
1057 * Ioctl interface. Part of the kernel mode frame buffer API is duplicated
1058 * here to be accessible by user mode code.
1059 */
1060 static int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd,
1061 unsigned long arg)
1062 {
1063 struct omapfb_plane_struct *plane = fbi->par;
1064 struct omapfb_device *fbdev = plane->fbdev;
1065 struct fb_ops *ops = fbi->fbops;
1066 union {
1067 struct omapfb_update_window update_window;
1068 struct omapfb_plane_info plane_info;
1069 struct omapfb_mem_info mem_info;
1070 struct omapfb_color_key color_key;
1071 enum omapfb_update_mode update_mode;
1072 struct omapfb_caps caps;
1073 unsigned int mirror;
1074 int plane_out;
1075 int enable_plane;
1076 } p;
1077 int r = 0;
1078
1079 BUG_ON(!ops);
1080 switch (cmd) {
1081 case OMAPFB_MIRROR:
1082 if (get_user(p.mirror, (int __user *)arg))
1083 r = -EFAULT;
1084 else
1085 omapfb_mirror(fbi, p.mirror);
1086 break;
1087 case OMAPFB_SYNC_GFX:
1088 omapfb_sync(fbi);
1089 break;
1090 case OMAPFB_VSYNC:
1091 break;
1092 case OMAPFB_SET_UPDATE_MODE:
1093 if (get_user(p.update_mode, (int __user *)arg))
1094 r = -EFAULT;
1095 else
1096 r = omapfb_set_update_mode(fbdev, p.update_mode);
1097 break;
1098 case OMAPFB_GET_UPDATE_MODE:
1099 p.update_mode = omapfb_get_update_mode(fbdev);
1100 if (put_user(p.update_mode,
1101 (enum omapfb_update_mode __user *)arg))
1102 r = -EFAULT;
1103 break;
1104 case OMAPFB_UPDATE_WINDOW_OLD:
1105 if (copy_from_user(&p.update_window, (void __user *)arg,
1106 sizeof(struct omapfb_update_window_old)))
1107 r = -EFAULT;
1108 else {
1109 struct omapfb_update_window *u = &p.update_window;
1110 u->out_x = u->x;
1111 u->out_y = u->y;
1112 u->out_width = u->width;
1113 u->out_height = u->height;
1114 memset(u->reserved, 0, sizeof(u->reserved));
1115 r = omapfb_update_win(fbi, u);
1116 }
1117 break;
1118 case OMAPFB_UPDATE_WINDOW:
1119 if (copy_from_user(&p.update_window, (void __user *)arg,
1120 sizeof(p.update_window)))
1121 r = -EFAULT;
1122 else
1123 r = omapfb_update_win(fbi, &p.update_window);
1124 break;
1125 case OMAPFB_SETUP_PLANE:
1126 if (copy_from_user(&p.plane_info, (void __user *)arg,
1127 sizeof(p.plane_info)))
1128 r = -EFAULT;
1129 else
1130 r = omapfb_setup_plane(fbi, &p.plane_info);
1131 break;
1132 case OMAPFB_QUERY_PLANE:
1133 if ((r = omapfb_query_plane(fbi, &p.plane_info)) < 0)
1134 break;
1135 if (copy_to_user((void __user *)arg, &p.plane_info,
1136 sizeof(p.plane_info)))
1137 r = -EFAULT;
1138 break;
1139 case OMAPFB_SETUP_MEM:
1140 if (copy_from_user(&p.mem_info, (void __user *)arg,
1141 sizeof(p.mem_info)))
1142 r = -EFAULT;
1143 else
1144 r = omapfb_setup_mem(fbi, &p.mem_info);
1145 break;
1146 case OMAPFB_QUERY_MEM:
1147 if ((r = omapfb_query_mem(fbi, &p.mem_info)) < 0)
1148 break;
1149 if (copy_to_user((void __user *)arg, &p.mem_info,
1150 sizeof(p.mem_info)))
1151 r = -EFAULT;
1152 break;
1153 case OMAPFB_SET_COLOR_KEY:
1154 if (copy_from_user(&p.color_key, (void __user *)arg,
1155 sizeof(p.color_key)))
1156 r = -EFAULT;
1157 else
1158 r = omapfb_set_color_key(fbdev, &p.color_key);
1159 break;
1160 case OMAPFB_GET_COLOR_KEY:
1161 if ((r = omapfb_get_color_key(fbdev, &p.color_key)) < 0)
1162 break;
1163 if (copy_to_user((void __user *)arg, &p.color_key,
1164 sizeof(p.color_key)))
1165 r = -EFAULT;
1166 break;
1167 case OMAPFB_GET_CAPS:
1168 omapfb_get_caps(fbdev, plane->idx, &p.caps);
1169 if (copy_to_user((void __user *)arg, &p.caps, sizeof(p.caps)))
1170 r = -EFAULT;
1171 break;
1172 case OMAPFB_LCD_TEST:
1173 {
1174 int test_num;
1175
1176 if (get_user(test_num, (int __user *)arg)) {
1177 r = -EFAULT;
1178 break;
1179 }
1180 if (!fbdev->panel->run_test) {
1181 r = -EINVAL;
1182 break;
1183 }
1184 r = fbdev->panel->run_test(fbdev->panel, test_num);
1185 break;
1186 }
1187 case OMAPFB_CTRL_TEST:
1188 {
1189 int test_num;
1190
1191 if (get_user(test_num, (int __user *)arg)) {
1192 r = -EFAULT;
1193 break;
1194 }
1195 if (!fbdev->ctrl->run_test) {
1196 r = -EINVAL;
1197 break;
1198 }
1199 r = fbdev->ctrl->run_test(test_num);
1200 break;
1201 }
1202 default:
1203 r = -EINVAL;
1204 }
1205
1206 return r;
1207 }
1208
1209 static int omapfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
1210 {
1211 struct omapfb_plane_struct *plane = info->par;
1212 struct omapfb_device *fbdev = plane->fbdev;
1213 int r;
1214
1215 omapfb_rqueue_lock(fbdev);
1216 r = fbdev->ctrl->mmap(info, vma);
1217 omapfb_rqueue_unlock(fbdev);
1218
1219 return r;
1220 }
1221
1222 /*
1223 * Callback table for the frame buffer framework. Some of these pointers
1224 * will be changed according to the current setting of fb_info->accel_flags.
1225 */
1226 static struct fb_ops omapfb_ops = {
1227 .owner = THIS_MODULE,
1228 .fb_open = omapfb_open,
1229 .fb_release = omapfb_release,
1230 .fb_setcolreg = omapfb_setcolreg,
1231 .fb_setcmap = omapfb_setcmap,
1232 .fb_fillrect = cfb_fillrect,
1233 .fb_copyarea = cfb_copyarea,
1234 .fb_imageblit = cfb_imageblit,
1235 .fb_blank = omapfb_blank,
1236 .fb_ioctl = omapfb_ioctl,
1237 .fb_check_var = omapfb_check_var,
1238 .fb_set_par = omapfb_set_par,
1239 .fb_rotate = omapfb_rotate,
1240 .fb_pan_display = omapfb_pan_display,
1241 };
1242
1243 /*
1244 * ---------------------------------------------------------------------------
1245 * Sysfs interface
1246 * ---------------------------------------------------------------------------
1247 */
1248 /* omapfbX sysfs entries */
1249 static ssize_t omapfb_show_caps_num(struct device *dev,
1250 struct device_attribute *attr, char *buf)
1251 {
1252 struct omapfb_device *fbdev = (struct omapfb_device *)dev->driver_data;
1253 int plane;
1254 size_t size;
1255 struct omapfb_caps caps;
1256
1257 plane = 0;
1258 size = 0;
1259 while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1260 omapfb_get_caps(fbdev, plane, &caps);
1261 size += snprintf(&buf[size], PAGE_SIZE - size,
1262 "plane#%d %#010x %#010x %#010x\n",
1263 plane, caps.ctrl, caps.plane_color, caps.wnd_color);
1264 plane++;
1265 }
1266 return size;
1267 }
1268
1269 static ssize_t omapfb_show_caps_text(struct device *dev,
1270 struct device_attribute *attr, char *buf)
1271 {
1272 struct omapfb_device *fbdev = (struct omapfb_device *)dev->driver_data;
1273 int i;
1274 struct omapfb_caps caps;
1275 int plane;
1276 size_t size;
1277
1278 plane = 0;
1279 size = 0;
1280 while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1281 omapfb_get_caps(fbdev, plane, &caps);
1282 size += snprintf(&buf[size], PAGE_SIZE - size,
1283 "plane#%d:\n", plane);
1284 for (i = 0; i < ARRAY_SIZE(ctrl_caps) &&
1285 size < PAGE_SIZE; i++) {
1286 if (ctrl_caps[i].flag & caps.ctrl)
1287 size += snprintf(&buf[size], PAGE_SIZE - size,
1288 " %s\n", ctrl_caps[i].name);
1289 }
1290 size += snprintf(&buf[size], PAGE_SIZE - size,
1291 " plane colors:\n");
1292 for (i = 0; i < ARRAY_SIZE(color_caps) &&
1293 size < PAGE_SIZE; i++) {
1294 if (color_caps[i].flag & caps.plane_color)
1295 size += snprintf(&buf[size], PAGE_SIZE - size,
1296 " %s\n", color_caps[i].name);
1297 }
1298 size += snprintf(&buf[size], PAGE_SIZE - size,
1299 " window colors:\n");
1300 for (i = 0; i < ARRAY_SIZE(color_caps) &&
1301 size < PAGE_SIZE; i++) {
1302 if (color_caps[i].flag & caps.wnd_color)
1303 size += snprintf(&buf[size], PAGE_SIZE - size,
1304 " %s\n", color_caps[i].name);
1305 }
1306
1307 plane++;
1308 }
1309 return size;
1310 }
1311
1312 static DEVICE_ATTR(caps_num, 0444, omapfb_show_caps_num, NULL);
1313 static DEVICE_ATTR(caps_text, 0444, omapfb_show_caps_text, NULL);
1314
1315 /* panel sysfs entries */
1316 static ssize_t omapfb_show_panel_name(struct device *dev,
1317 struct device_attribute *attr, char *buf)
1318 {
1319 struct omapfb_device *fbdev = (struct omapfb_device *)dev->driver_data;
1320
1321 return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->panel->name);
1322 }
1323
1324 static ssize_t omapfb_show_bklight_level(struct device *dev,
1325 struct device_attribute *attr,
1326 char *buf)
1327 {
1328 struct omapfb_device *fbdev = (struct omapfb_device *)dev->driver_data;
1329 int r;
1330
1331 if (fbdev->panel->get_bklight_level) {
1332 r = snprintf(buf, PAGE_SIZE, "%d\n",
1333 fbdev->panel->get_bklight_level(fbdev->panel));
1334 } else
1335 r = -ENODEV;
1336 return r;
1337 }
1338
1339 static ssize_t omapfb_store_bklight_level(struct device *dev,
1340 struct device_attribute *attr,
1341 const char *buf, size_t size)
1342 {
1343 struct omapfb_device *fbdev = (struct omapfb_device *)dev->driver_data;
1344 int r;
1345
1346 if (fbdev->panel->set_bklight_level) {
1347 unsigned int level;
1348
1349 if (sscanf(buf, "%10d", &level) == 1) {
1350 r = fbdev->panel->set_bklight_level(fbdev->panel,
1351 level);
1352 } else
1353 r = -EINVAL;
1354 } else
1355 r = -ENODEV;
1356 return r ? r : size;
1357 }
1358
1359 static ssize_t omapfb_show_bklight_max(struct device *dev,
1360 struct device_attribute *attr, char *buf)
1361 {
1362 struct omapfb_device *fbdev = (struct omapfb_device *)dev->driver_data;
1363 int r;
1364
1365 if (fbdev->panel->get_bklight_level) {
1366 r = snprintf(buf, PAGE_SIZE, "%d\n",
1367 fbdev->panel->get_bklight_max(fbdev->panel));
1368 } else
1369 r = -ENODEV;
1370 return r;
1371 }
1372
1373 static struct device_attribute dev_attr_panel_name =
1374 __ATTR(name, 0444, omapfb_show_panel_name, NULL);
1375 static DEVICE_ATTR(backlight_level, 0664,
1376 omapfb_show_bklight_level, omapfb_store_bklight_level);
1377 static DEVICE_ATTR(backlight_max, 0444, omapfb_show_bklight_max, NULL);
1378
1379 static struct attribute *panel_attrs[] = {
1380 &dev_attr_panel_name.attr,
1381 &dev_attr_backlight_level.attr,
1382 &dev_attr_backlight_max.attr,
1383 NULL,
1384 };
1385
1386 static struct attribute_group panel_attr_grp = {
1387 .name = "panel",
1388 .attrs = panel_attrs,
1389 };
1390
1391 /* ctrl sysfs entries */
1392 static ssize_t omapfb_show_ctrl_name(struct device *dev,
1393 struct device_attribute *attr, char *buf)
1394 {
1395 struct omapfb_device *fbdev = (struct omapfb_device *)dev->driver_data;
1396
1397 return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->ctrl->name);
1398 }
1399
1400 static struct device_attribute dev_attr_ctrl_name =
1401 __ATTR(name, 0444, omapfb_show_ctrl_name, NULL);
1402
1403 static struct attribute *ctrl_attrs[] = {
1404 &dev_attr_ctrl_name.attr,
1405 NULL,
1406 };
1407
1408 static struct attribute_group ctrl_attr_grp = {
1409 .name = "ctrl",
1410 .attrs = ctrl_attrs,
1411 };
1412
1413 static int omapfb_register_sysfs(struct omapfb_device *fbdev)
1414 {
1415 int r;
1416
1417 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_num)))
1418 goto fail0;
1419
1420 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_text)))
1421 goto fail1;
1422
1423 if ((r = sysfs_create_group(&fbdev->dev->kobj, &panel_attr_grp)))
1424 goto fail2;
1425
1426 if ((r = sysfs_create_group(&fbdev->dev->kobj, &ctrl_attr_grp)))
1427 goto fail3;
1428
1429 return 0;
1430 fail3:
1431 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1432 fail2:
1433 device_remove_file(fbdev->dev, &dev_attr_caps_text);
1434 fail1:
1435 device_remove_file(fbdev->dev, &dev_attr_caps_num);
1436 fail0:
1437 dev_err(fbdev->dev, "unable to register sysfs interface\n");
1438 return r;
1439 }
1440
1441 static void omapfb_unregister_sysfs(struct omapfb_device *fbdev)
1442 {
1443 sysfs_remove_group(&fbdev->dev->kobj, &ctrl_attr_grp);
1444 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1445 device_remove_file(fbdev->dev, &dev_attr_caps_num);
1446 device_remove_file(fbdev->dev, &dev_attr_caps_text);
1447 }
1448
1449 /*
1450 * ---------------------------------------------------------------------------
1451 * LDM callbacks
1452 * ---------------------------------------------------------------------------
1453 */
1454 /* Initialize system fb_info object and set the default video mode.
1455 * The frame buffer memory already allocated by lcddma_init
1456 */
1457 static int fbinfo_init(struct omapfb_device *fbdev, struct fb_info *info)
1458 {
1459 struct fb_var_screeninfo *var = &info->var;
1460 struct fb_fix_screeninfo *fix = &info->fix;
1461 int r = 0;
1462
1463 info->fbops = &omapfb_ops;
1464 info->flags = FBINFO_FLAG_DEFAULT;
1465
1466 strncpy(fix->id, MODULE_NAME, sizeof(fix->id));
1467
1468 info->pseudo_palette = fbdev->pseudo_palette;
1469
1470 var->accel_flags = def_accel ? FB_ACCELF_TEXT : 0;
1471 var->xres = def_vxres;
1472 var->yres = def_vyres;
1473 var->xres_virtual = def_vxres;
1474 var->yres_virtual = def_vyres;
1475 var->rotate = def_rotate;
1476 var->bits_per_pixel = fbdev->panel->bpp;
1477
1478 set_fb_var(info, var);
1479 set_fb_fix(info);
1480
1481 r = fb_alloc_cmap(&info->cmap, 16, 0);
1482 if (r != 0)
1483 dev_err(fbdev->dev, "unable to allocate color map memory\n");
1484
1485 return r;
1486 }
1487
1488 /* Release the fb_info object */
1489 static void fbinfo_cleanup(struct omapfb_device *fbdev, struct fb_info *fbi)
1490 {
1491 fb_dealloc_cmap(&fbi->cmap);
1492 }
1493
1494 static void planes_cleanup(struct omapfb_device *fbdev)
1495 {
1496 int i;
1497
1498 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1499 if (fbdev->fb_info[i] == NULL)
1500 break;
1501 fbinfo_cleanup(fbdev, fbdev->fb_info[i]);
1502 framebuffer_release(fbdev->fb_info[i]);
1503 }
1504 }
1505
1506 static int planes_init(struct omapfb_device *fbdev)
1507 {
1508 struct fb_info *fbi;
1509 int i;
1510 int r;
1511
1512 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1513 struct omapfb_plane_struct *plane;
1514 fbi = framebuffer_alloc(sizeof(struct omapfb_plane_struct),
1515 fbdev->dev);
1516 if (fbi == NULL) {
1517 dev_err(fbdev->dev,
1518 "unable to allocate memory for plane info\n");
1519 planes_cleanup(fbdev);
1520 return -ENOMEM;
1521 }
1522 plane = fbi->par;
1523 plane->idx = i;
1524 plane->fbdev = fbdev;
1525 plane->info.mirror = def_mirror;
1526 fbdev->fb_info[i] = fbi;
1527
1528 if ((r = fbinfo_init(fbdev, fbi)) < 0) {
1529 framebuffer_release(fbi);
1530 planes_cleanup(fbdev);
1531 return r;
1532 }
1533 plane->info.out_width = fbi->var.xres;
1534 plane->info.out_height = fbi->var.yres;
1535 }
1536 return 0;
1537 }
1538
1539 /*
1540 * Free driver resources. Can be called to rollback an aborted initialization
1541 * sequence.
1542 */
1543 static void omapfb_free_resources(struct omapfb_device *fbdev, int state)
1544 {
1545 int i;
1546
1547 switch (state) {
1548 case OMAPFB_ACTIVE:
1549 for (i = 0; i < fbdev->mem_desc.region_cnt; i++)
1550 unregister_framebuffer(fbdev->fb_info[i]);
1551 case 7:
1552 omapfb_unregister_sysfs(fbdev);
1553 case 6:
1554 fbdev->panel->disable(fbdev->panel);
1555 case 5:
1556 omapfb_set_update_mode(fbdev, OMAPFB_UPDATE_DISABLED);
1557 case 4:
1558 planes_cleanup(fbdev);
1559 case 3:
1560 ctrl_cleanup(fbdev);
1561 case 2:
1562 fbdev->panel->cleanup(fbdev->panel);
1563 case 1:
1564 dev_set_drvdata(fbdev->dev, NULL);
1565 kfree(fbdev);
1566 case 0:
1567 /* nothing to free */
1568 break;
1569 default:
1570 BUG();
1571 }
1572 }
1573
1574 static int omapfb_find_ctrl(struct omapfb_device *fbdev)
1575 {
1576 struct omapfb_platform_data *conf;
1577 char name[17];
1578 int i;
1579
1580 conf = fbdev->dev->platform_data;
1581
1582 fbdev->ctrl = NULL;
1583
1584 strncpy(name, conf->lcd.ctrl_name, sizeof(name) - 1);
1585 name[sizeof(name) - 1] = '\0';
1586
1587 if (strcmp(name, "internal") == 0) {
1588 fbdev->ctrl = fbdev->int_ctrl;
1589 return 0;
1590 }
1591
1592 for (i = 0; i < ARRAY_SIZE(ctrls); i++) {
1593 dev_dbg(fbdev->dev, "ctrl %s\n", ctrls[i]->name);
1594 if (strcmp(ctrls[i]->name, name) == 0) {
1595 fbdev->ctrl = ctrls[i];
1596 break;
1597 }
1598 }
1599
1600 if (fbdev->ctrl == NULL) {
1601 dev_dbg(fbdev->dev, "ctrl %s not supported\n", name);
1602 return -1;
1603 }
1604
1605 return 0;
1606 }
1607
1608 static void check_required_callbacks(struct omapfb_device *fbdev)
1609 {
1610 #define _C(x) (fbdev->ctrl->x != NULL)
1611 #define _P(x) (fbdev->panel->x != NULL)
1612 BUG_ON(fbdev->ctrl == NULL || fbdev->panel == NULL);
1613 BUG_ON(!(_C(init) && _C(cleanup) && _C(get_caps) &&
1614 _C(set_update_mode) && _C(setup_plane) && _C(enable_plane) &&
1615 _P(init) && _P(cleanup) && _P(enable) && _P(disable) &&
1616 _P(get_caps)));
1617 #undef _P
1618 #undef _C
1619 }
1620
1621 /*
1622 * Called by LDM binding to probe and attach a new device.
1623 * Initialization sequence:
1624 * 1. allocate system omapfb_device structure
1625 * 2. select controller type according to platform configuration
1626 * init LCD panel
1627 * 3. init LCD controller and LCD DMA
1628 * 4. init system fb_info structure for all planes
1629 * 5. setup video mode for first plane and enable it
1630 * 6. enable LCD panel
1631 * 7. register sysfs attributes
1632 * OMAPFB_ACTIVE: register system fb_info structure for all planes
1633 */
1634 static int omapfb_do_probe(struct platform_device *pdev,
1635 struct lcd_panel *panel)
1636 {
1637 struct omapfb_device *fbdev = NULL;
1638 int init_state;
1639 unsigned long phz, hhz, vhz;
1640 unsigned long vram;
1641 int i;
1642 int r = 0;
1643
1644 init_state = 0;
1645
1646 if (pdev->num_resources != 0) {
1647 dev_err(&pdev->dev, "probed for an unknown device\n");
1648 r = -ENODEV;
1649 goto cleanup;
1650 }
1651
1652 if (pdev->dev.platform_data == NULL) {
1653 dev_err(&pdev->dev, "missing platform data\n");
1654 r = -ENOENT;
1655 goto cleanup;
1656 }
1657
1658 fbdev = kzalloc(sizeof(struct omapfb_device), GFP_KERNEL);
1659 if (fbdev == NULL) {
1660 dev_err(&pdev->dev,
1661 "unable to allocate memory for device info\n");
1662 r = -ENOMEM;
1663 goto cleanup;
1664 }
1665 init_state++;
1666
1667 fbdev->dev = &pdev->dev;
1668 fbdev->panel = panel;
1669 platform_set_drvdata(pdev, fbdev);
1670
1671 mutex_init(&fbdev->rqueue_mutex);
1672
1673 #ifdef CONFIG_ARCH_OMAP1
1674 fbdev->int_ctrl = &omap1_int_ctrl;
1675 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
1676 fbdev->ext_if = &omap1_ext_if;
1677 #endif
1678 #else /* OMAP2 */
1679 fbdev->int_ctrl = &omap2_int_ctrl;
1680 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
1681 fbdev->ext_if = &omap2_ext_if;
1682 #endif
1683 #endif
1684 if (omapfb_find_ctrl(fbdev) < 0) {
1685 dev_err(fbdev->dev,
1686 "LCD controller not found, board not supported\n");
1687 r = -ENODEV;
1688 goto cleanup;
1689 }
1690
1691 r = fbdev->panel->init(fbdev->panel, fbdev);
1692 if (r)
1693 goto cleanup;
1694
1695 pr_info("omapfb: configured for panel %s\n", fbdev->panel->name);
1696
1697 def_vxres = def_vxres ? : fbdev->panel->x_res;
1698 def_vyres = def_vyres ? : fbdev->panel->y_res;
1699
1700 init_state++;
1701
1702 r = ctrl_init(fbdev);
1703 if (r)
1704 goto cleanup;
1705 if (fbdev->ctrl->mmap != NULL)
1706 omapfb_ops.fb_mmap = omapfb_mmap;
1707 init_state++;
1708
1709 check_required_callbacks(fbdev);
1710
1711 r = planes_init(fbdev);
1712 if (r)
1713 goto cleanup;
1714 init_state++;
1715
1716 #ifdef CONFIG_FB_OMAP_DMA_TUNE
1717 /* Set DMA priority for EMIFF access to highest */
1718 if (cpu_class_is_omap1())
1719 omap_set_dma_priority(0, OMAP_DMA_PORT_EMIFF, 15);
1720 #endif
1721
1722 r = ctrl_change_mode(fbdev->fb_info[0]);
1723 if (r) {
1724 dev_err(fbdev->dev, "mode setting failed\n");
1725 goto cleanup;
1726 }
1727
1728 /* GFX plane is enabled by default */
1729 r = fbdev->ctrl->enable_plane(OMAPFB_PLANE_GFX, 1);
1730 if (r)
1731 goto cleanup;
1732
1733 omapfb_set_update_mode(fbdev, manual_update ?
1734 OMAPFB_MANUAL_UPDATE : OMAPFB_AUTO_UPDATE);
1735 init_state++;
1736
1737 r = fbdev->panel->enable(fbdev->panel);
1738 if (r)
1739 goto cleanup;
1740 init_state++;
1741
1742 r = omapfb_register_sysfs(fbdev);
1743 if (r)
1744 goto cleanup;
1745 init_state++;
1746
1747 vram = 0;
1748 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1749 r = register_framebuffer(fbdev->fb_info[i]);
1750 if (r != 0) {
1751 dev_err(fbdev->dev,
1752 "registering framebuffer %d failed\n", i);
1753 goto cleanup;
1754 }
1755 vram += fbdev->mem_desc.region[i].size;
1756 }
1757
1758 fbdev->state = OMAPFB_ACTIVE;
1759
1760 panel = fbdev->panel;
1761 phz = panel->pixel_clock * 1000;
1762 hhz = phz * 10 / (panel->hfp + panel->x_res + panel->hbp + panel->hsw);
1763 vhz = hhz / (panel->vfp + panel->y_res + panel->vbp + panel->vsw);
1764
1765 omapfb_dev = fbdev;
1766
1767 pr_info("omapfb: Framebuffer initialized. Total vram %lu planes %d\n",
1768 vram, fbdev->mem_desc.region_cnt);
1769 pr_info("omapfb: Pixclock %lu kHz hfreq %lu.%lu kHz "
1770 "vfreq %lu.%lu Hz\n",
1771 phz / 1000, hhz / 10000, hhz % 10, vhz / 10, vhz % 10);
1772
1773 return 0;
1774
1775 cleanup:
1776 omapfb_free_resources(fbdev, init_state);
1777
1778 return r;
1779 }
1780
1781 static int omapfb_probe(struct platform_device *pdev)
1782 {
1783 BUG_ON(fbdev_pdev != NULL);
1784
1785 /* Delay actual initialization until the LCD is registered */
1786 fbdev_pdev = pdev;
1787 if (fbdev_panel != NULL)
1788 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1789 return 0;
1790 }
1791
1792 void omapfb_register_panel(struct lcd_panel *panel)
1793 {
1794 BUG_ON(fbdev_panel != NULL);
1795
1796 fbdev_panel = panel;
1797 if (fbdev_pdev != NULL)
1798 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1799 }
1800
1801 /* Called when the device is being detached from the driver */
1802 static int omapfb_remove(struct platform_device *pdev)
1803 {
1804 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1805 enum omapfb_state saved_state = fbdev->state;
1806
1807 /* FIXME: wait till completion of pending events */
1808
1809 fbdev->state = OMAPFB_DISABLED;
1810 omapfb_free_resources(fbdev, saved_state);
1811
1812 return 0;
1813 }
1814
1815 /* PM suspend */
1816 static int omapfb_suspend(struct platform_device *pdev, pm_message_t mesg)
1817 {
1818 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1819
1820 omapfb_blank(VESA_POWERDOWN, fbdev->fb_info[0]);
1821
1822 return 0;
1823 }
1824
1825 /* PM resume */
1826 static int omapfb_resume(struct platform_device *pdev)
1827 {
1828 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1829
1830 omapfb_blank(VESA_NO_BLANKING, fbdev->fb_info[0]);
1831 return 0;
1832 }
1833
1834 static struct platform_driver omapfb_driver = {
1835 .probe = omapfb_probe,
1836 .remove = omapfb_remove,
1837 .suspend = omapfb_suspend,
1838 .resume = omapfb_resume,
1839 .driver = {
1840 .name = MODULE_NAME,
1841 .owner = THIS_MODULE,
1842 },
1843 };
1844
1845 #ifndef MODULE
1846
1847 /* Process kernel command line parameters */
1848 static int __init omapfb_setup(char *options)
1849 {
1850 char *this_opt = NULL;
1851 int r = 0;
1852
1853 pr_debug("omapfb: options %s\n", options);
1854
1855 if (!options || !*options)
1856 return 0;
1857
1858 while (!r && (this_opt = strsep(&options, ",")) != NULL) {
1859 if (!strncmp(this_opt, "accel", 5))
1860 def_accel = 1;
1861 else if (!strncmp(this_opt, "vram:", 5)) {
1862 char *suffix;
1863 unsigned long vram;
1864 vram = (simple_strtoul(this_opt + 5, &suffix, 0));
1865 switch (suffix[0]) {
1866 case '\0':
1867 break;
1868 case 'm':
1869 case 'M':
1870 vram *= 1024;
1871 /* Fall through */
1872 case 'k':
1873 case 'K':
1874 vram *= 1024;
1875 break;
1876 default:
1877 pr_debug("omapfb: invalid vram suffix %c\n",
1878 suffix[0]);
1879 r = -1;
1880 }
1881 def_vram[def_vram_cnt++] = vram;
1882 }
1883 else if (!strncmp(this_opt, "vxres:", 6))
1884 def_vxres = simple_strtoul(this_opt + 6, NULL, 0);
1885 else if (!strncmp(this_opt, "vyres:", 6))
1886 def_vyres = simple_strtoul(this_opt + 6, NULL, 0);
1887 else if (!strncmp(this_opt, "rotate:", 7))
1888 def_rotate = (simple_strtoul(this_opt + 7, NULL, 0));
1889 else if (!strncmp(this_opt, "mirror:", 7))
1890 def_mirror = (simple_strtoul(this_opt + 7, NULL, 0));
1891 else if (!strncmp(this_opt, "manual_update", 13))
1892 manual_update = 1;
1893 else {
1894 pr_debug("omapfb: invalid option\n");
1895 r = -1;
1896 }
1897 }
1898
1899 return r;
1900 }
1901
1902 #endif
1903
1904 /* Register both the driver and the device */
1905 static int __init omapfb_init(void)
1906 {
1907 #ifndef MODULE
1908 char *option;
1909
1910 if (fb_get_options("omapfb", &option))
1911 return -ENODEV;
1912 omapfb_setup(option);
1913 #endif
1914 /* Register the driver with LDM */
1915 if (platform_driver_register(&omapfb_driver)) {
1916 pr_debug("failed to register omapfb driver\n");
1917 return -ENODEV;
1918 }
1919
1920 return 0;
1921 }
1922
1923 static void __exit omapfb_cleanup(void)
1924 {
1925 platform_driver_unregister(&omapfb_driver);
1926 }
1927
1928 module_param_named(accel, def_accel, uint, 0664);
1929 module_param_array_named(vram, def_vram, ulong, &def_vram_cnt, 0664);
1930 module_param_named(vxres, def_vxres, long, 0664);
1931 module_param_named(vyres, def_vyres, long, 0664);
1932 module_param_named(rotate, def_rotate, uint, 0664);
1933 module_param_named(mirror, def_mirror, uint, 0664);
1934 module_param_named(manual_update, manual_update, bool, 0664);
1935
1936 module_init(omapfb_init);
1937 module_exit(omapfb_cleanup);
1938
1939 MODULE_DESCRIPTION("TI OMAP framebuffer driver");
1940 MODULE_AUTHOR("Imre Deak <imre.deak@nokia.com>");
1941 MODULE_LICENSE("GPL");
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