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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / video / omap / omapfb_main.c
blobb291bfaac80e79bc931c8131afec2a4f6a627353
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/slab.h>
30 #include <linux/uaccess.h>
31 #include <linux/module.h>
32
33 #include <plat/dma.h>
34
35 #include "omapfb.h"
36 #include "lcdc.h"
37 #include "dispc.h"
38
39 #define MODULE_NAME "omapfb"
40
41 static unsigned int def_accel;
42 static unsigned long def_vram[OMAPFB_PLANE_NUM];
43 static unsigned int def_vram_cnt;
44 static unsigned long def_vxres;
45 static unsigned long def_vyres;
46 static unsigned int def_rotate;
47 static unsigned int def_mirror;
48
49 #ifdef CONFIG_FB_OMAP_MANUAL_UPDATE
50 static bool manual_update = 1;
51 #else
52 static bool manual_update;
53 #endif
54
55 static struct platform_device *fbdev_pdev;
56 static struct lcd_panel *fbdev_panel;
57 static struct omapfb_device *omapfb_dev;
58
59 struct caps_table_struct {
60 unsigned long flag;
61 const char *name;
62 };
63
64 static struct caps_table_struct ctrl_caps[] = {
65 { OMAPFB_CAPS_MANUAL_UPDATE, "manual update" },
66 { OMAPFB_CAPS_TEARSYNC, "tearing synchronization" },
67 { OMAPFB_CAPS_PLANE_RELOCATE_MEM, "relocate plane memory" },
68 { OMAPFB_CAPS_PLANE_SCALE, "scale plane" },
69 { OMAPFB_CAPS_WINDOW_PIXEL_DOUBLE, "pixel double window" },
70 { OMAPFB_CAPS_WINDOW_SCALE, "scale window" },
71 { OMAPFB_CAPS_WINDOW_OVERLAY, "overlay window" },
72 { OMAPFB_CAPS_WINDOW_ROTATE, "rotate window" },
73 { OMAPFB_CAPS_SET_BACKLIGHT, "backlight setting" },
74 };
75
76 static struct caps_table_struct color_caps[] = {
77 { 1 << OMAPFB_COLOR_RGB565, "RGB565", },
78 { 1 << OMAPFB_COLOR_YUV422, "YUV422", },
79 { 1 << OMAPFB_COLOR_YUV420, "YUV420", },
80 { 1 << OMAPFB_COLOR_CLUT_8BPP, "CLUT8", },
81 { 1 << OMAPFB_COLOR_CLUT_4BPP, "CLUT4", },
82 { 1 << OMAPFB_COLOR_CLUT_2BPP, "CLUT2", },
83 { 1 << OMAPFB_COLOR_CLUT_1BPP, "CLUT1", },
84 { 1 << OMAPFB_COLOR_RGB444, "RGB444", },
85 { 1 << OMAPFB_COLOR_YUY422, "YUY422", },
86 };
87
88 static void omapdss_release(struct device *dev)
89 {
90 }
91
92 /* dummy device for clocks */
93 static struct platform_device omapdss_device = {
94 .name = "omapdss_dss",
95 .id = -1,
96 .dev = {
97 .release = omapdss_release,
98 },
99 };
100
101 /*
102 * ---------------------------------------------------------------------------
103 * LCD panel
104 * ---------------------------------------------------------------------------
105 */
106 extern struct lcd_ctrl hwa742_ctrl;
107 extern struct lcd_ctrl blizzard_ctrl;
108
109 static const struct lcd_ctrl *ctrls[] = {
110 #ifdef CONFIG_ARCH_OMAP1
111 &omap1_int_ctrl,
112 #else
113 &omap2_int_ctrl,
114 #endif
115
116 #ifdef CONFIG_FB_OMAP_LCDC_HWA742
117 &hwa742_ctrl,
118 #endif
119 #ifdef CONFIG_FB_OMAP_LCDC_BLIZZARD
120 &blizzard_ctrl,
121 #endif
122 };
123
124 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
125 #ifdef CONFIG_ARCH_OMAP1
126 extern struct lcd_ctrl_extif omap1_ext_if;
127 #else
128 extern struct lcd_ctrl_extif omap2_ext_if;
129 #endif
130 #endif
131
132 static void omapfb_rqueue_lock(struct omapfb_device *fbdev)
133 {
134 mutex_lock(&fbdev->rqueue_mutex);
135 }
136
137 static void omapfb_rqueue_unlock(struct omapfb_device *fbdev)
138 {
139 mutex_unlock(&fbdev->rqueue_mutex);
140 }
141
142 /*
143 * ---------------------------------------------------------------------------
144 * LCD controller and LCD DMA
145 * ---------------------------------------------------------------------------
146 */
147 /* Lookup table to map elem size to elem type. */
148 static const int dma_elem_type[] = {
149 0,
150 OMAP_DMA_DATA_TYPE_S8,
151 OMAP_DMA_DATA_TYPE_S16,
152 0,
153 OMAP_DMA_DATA_TYPE_S32,
154 };
155
156 /*
157 * Allocate resources needed for LCD controller and LCD DMA operations. Video
158 * memory is allocated from system memory according to the virtual display
159 * size, except if a bigger memory size is specified explicitly as a kernel
160 * parameter.
161 */
162 static int ctrl_init(struct omapfb_device *fbdev)
163 {
164 int r;
165 int i;
166
167 /* kernel/module vram parameters override boot tags/board config */
168 if (def_vram_cnt) {
169 for (i = 0; i < def_vram_cnt; i++)
170 fbdev->mem_desc.region[i].size =
171 PAGE_ALIGN(def_vram[i]);
172 fbdev->mem_desc.region_cnt = i;
173 } else {
174 struct omapfb_platform_data *conf;
175
176 conf = fbdev->dev->platform_data;
177 fbdev->mem_desc = conf->mem_desc;
178 }
179
180 if (!fbdev->mem_desc.region_cnt) {
181 struct lcd_panel *panel = fbdev->panel;
182 int def_size;
183 int bpp = panel->bpp;
184
185 /* 12 bpp is packed in 16 bits */
186 if (bpp == 12)
187 bpp = 16;
188 def_size = def_vxres * def_vyres * bpp / 8;
189 fbdev->mem_desc.region_cnt = 1;
190 fbdev->mem_desc.region[0].size = PAGE_ALIGN(def_size);
191 }
192 r = fbdev->ctrl->init(fbdev, 0, &fbdev->mem_desc);
193 if (r < 0) {
194 dev_err(fbdev->dev, "controller initialization failed (%d)\n",
195 r);
196 return r;
197 }
198
199 #ifdef DEBUG
200 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
201 dev_dbg(fbdev->dev, "region%d phys %08x virt %p size=%lu\n",
202 i,
203 fbdev->mem_desc.region[i].paddr,
204 fbdev->mem_desc.region[i].vaddr,
205 fbdev->mem_desc.region[i].size);
206 }
207 #endif
208 return 0;
209 }
210
211 static void ctrl_cleanup(struct omapfb_device *fbdev)
212 {
213 fbdev->ctrl->cleanup();
214 }
215
216 /* Must be called with fbdev->rqueue_mutex held. */
217 static int ctrl_change_mode(struct fb_info *fbi)
218 {
219 int r;
220 unsigned long offset;
221 struct omapfb_plane_struct *plane = fbi->par;
222 struct omapfb_device *fbdev = plane->fbdev;
223 struct fb_var_screeninfo *var = &fbi->var;
224
225 offset = var->yoffset * fbi->fix.line_length +
226 var->xoffset * var->bits_per_pixel / 8;
227
228 if (fbdev->ctrl->sync)
229 fbdev->ctrl->sync();
230 r = fbdev->ctrl->setup_plane(plane->idx, plane->info.channel_out,
231 offset, var->xres_virtual,
232 plane->info.pos_x, plane->info.pos_y,
233 var->xres, var->yres, plane->color_mode);
234 if (r < 0)
235 return r;
236
237 if (fbdev->ctrl->set_rotate != NULL) {
238 r = fbdev->ctrl->set_rotate(var->rotate);
239 if (r < 0)
240 return r;
241 }
242
243 if (fbdev->ctrl->set_scale != NULL)
244 r = fbdev->ctrl->set_scale(plane->idx,
245 var->xres, var->yres,
246 plane->info.out_width,
247 plane->info.out_height);
248
249 return r;
250 }
251
252 /*
253 * ---------------------------------------------------------------------------
254 * fbdev framework callbacks and the ioctl interface
255 * ---------------------------------------------------------------------------
256 */
257 /* Called each time the omapfb device is opened */
258 static int omapfb_open(struct fb_info *info, int user)
259 {
260 return 0;
261 }
262
263 static void omapfb_sync(struct fb_info *info);
264
265 /* Called when the omapfb device is closed. We make sure that any pending
266 * gfx DMA operations are ended, before we return. */
267 static int omapfb_release(struct fb_info *info, int user)
268 {
269 omapfb_sync(info);
270 return 0;
271 }
272
273 /* Store a single color palette entry into a pseudo palette or the hardware
274 * palette if one is available. For now we support only 16bpp and thus store
275 * the entry only to the pseudo palette.
276 */
277 static int _setcolreg(struct fb_info *info, u_int regno, u_int red, u_int green,
278 u_int blue, u_int transp, int update_hw_pal)
279 {
280 struct omapfb_plane_struct *plane = info->par;
281 struct omapfb_device *fbdev = plane->fbdev;
282 struct fb_var_screeninfo *var = &info->var;
283 int r = 0;
284
285 switch (plane->color_mode) {
286 case OMAPFB_COLOR_YUV422:
287 case OMAPFB_COLOR_YUV420:
288 case OMAPFB_COLOR_YUY422:
289 r = -EINVAL;
290 break;
291 case OMAPFB_COLOR_CLUT_8BPP:
292 case OMAPFB_COLOR_CLUT_4BPP:
293 case OMAPFB_COLOR_CLUT_2BPP:
294 case OMAPFB_COLOR_CLUT_1BPP:
295 if (fbdev->ctrl->setcolreg)
296 r = fbdev->ctrl->setcolreg(regno, red, green, blue,
297 transp, update_hw_pal);
298 /* Fallthrough */
299 case OMAPFB_COLOR_RGB565:
300 case OMAPFB_COLOR_RGB444:
301 if (r != 0)
302 break;
303
304 if (regno < 0) {
305 r = -EINVAL;
306 break;
307 }
308
309 if (regno < 16) {
310 u16 pal;
311 pal = ((red >> (16 - var->red.length)) <<
312 var->red.offset) |
313 ((green >> (16 - var->green.length)) <<
314 var->green.offset) |
315 (blue >> (16 - var->blue.length));
316 ((u32 *)(info->pseudo_palette))[regno] = pal;
317 }
318 break;
319 default:
320 BUG();
321 }
322 return r;
323 }
324
325 static int omapfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
326 u_int transp, struct fb_info *info)
327 {
328 return _setcolreg(info, regno, red, green, blue, transp, 1);
329 }
330
331 static int omapfb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
332 {
333 int count, index, r;
334 u16 *red, *green, *blue, *transp;
335 u16 trans = 0xffff;
336
337 red = cmap->red;
338 green = cmap->green;
339 blue = cmap->blue;
340 transp = cmap->transp;
341 index = cmap->start;
342
343 for (count = 0; count < cmap->len; count++) {
344 if (transp)
345 trans = *transp++;
346 r = _setcolreg(info, index++, *red++, *green++, *blue++, trans,
347 count == cmap->len - 1);
348 if (r != 0)
349 return r;
350 }
351
352 return 0;
353 }
354
355 static int omapfb_update_full_screen(struct fb_info *fbi);
356
357 static int omapfb_blank(int blank, struct fb_info *fbi)
358 {
359 struct omapfb_plane_struct *plane = fbi->par;
360 struct omapfb_device *fbdev = plane->fbdev;
361 int do_update = 0;
362 int r = 0;
363
364 omapfb_rqueue_lock(fbdev);
365 switch (blank) {
366 case FB_BLANK_UNBLANK:
367 if (fbdev->state == OMAPFB_SUSPENDED) {
368 if (fbdev->ctrl->resume)
369 fbdev->ctrl->resume();
370 fbdev->panel->enable(fbdev->panel);
371 fbdev->state = OMAPFB_ACTIVE;
372 if (fbdev->ctrl->get_update_mode() ==
373 OMAPFB_MANUAL_UPDATE)
374 do_update = 1;
375 }
376 break;
377 case FB_BLANK_POWERDOWN:
378 if (fbdev->state == OMAPFB_ACTIVE) {
379 fbdev->panel->disable(fbdev->panel);
380 if (fbdev->ctrl->suspend)
381 fbdev->ctrl->suspend();
382 fbdev->state = OMAPFB_SUSPENDED;
383 }
384 break;
385 default:
386 r = -EINVAL;
387 }
388 omapfb_rqueue_unlock(fbdev);
389
390 if (r == 0 && do_update)
391 r = omapfb_update_full_screen(fbi);
392
393 return r;
394 }
395
396 static void omapfb_sync(struct fb_info *fbi)
397 {
398 struct omapfb_plane_struct *plane = fbi->par;
399 struct omapfb_device *fbdev = plane->fbdev;
400
401 omapfb_rqueue_lock(fbdev);
402 if (fbdev->ctrl->sync)
403 fbdev->ctrl->sync();
404 omapfb_rqueue_unlock(fbdev);
405 }
406
407 /*
408 * Set fb_info.fix fields and also updates fbdev.
409 * When calling this fb_info.var must be set up already.
410 */
411 static void set_fb_fix(struct fb_info *fbi, int from_init)
412 {
413 struct fb_fix_screeninfo *fix = &fbi->fix;
414 struct fb_var_screeninfo *var = &fbi->var;
415 struct omapfb_plane_struct *plane = fbi->par;
416 struct omapfb_mem_region *rg;
417 int bpp;
418
419 rg = &plane->fbdev->mem_desc.region[plane->idx];
420 fbi->screen_base = rg->vaddr;
421
422 if (!from_init) {
423 mutex_lock(&fbi->mm_lock);
424 fix->smem_start = rg->paddr;
425 fix->smem_len = rg->size;
426 mutex_unlock(&fbi->mm_lock);
427 } else {
428 fix->smem_start = rg->paddr;
429 fix->smem_len = rg->size;
430 }
431
432 fix->type = FB_TYPE_PACKED_PIXELS;
433 bpp = var->bits_per_pixel;
434 if (var->nonstd)
435 fix->visual = FB_VISUAL_PSEUDOCOLOR;
436 else switch (var->bits_per_pixel) {
437 case 16:
438 case 12:
439 fix->visual = FB_VISUAL_TRUECOLOR;
440 /* 12bpp is stored in 16 bits */
441 bpp = 16;
442 break;
443 case 1:
444 case 2:
445 case 4:
446 case 8:
447 fix->visual = FB_VISUAL_PSEUDOCOLOR;
448 break;
449 }
450 fix->accel = FB_ACCEL_OMAP1610;
451 fix->line_length = var->xres_virtual * bpp / 8;
452 }
453
454 static int set_color_mode(struct omapfb_plane_struct *plane,
455 struct fb_var_screeninfo *var)
456 {
457 switch (var->nonstd) {
458 case 0:
459 break;
460 case OMAPFB_COLOR_YUV422:
461 var->bits_per_pixel = 16;
462 plane->color_mode = var->nonstd;
463 return 0;
464 case OMAPFB_COLOR_YUV420:
465 var->bits_per_pixel = 12;
466 plane->color_mode = var->nonstd;
467 return 0;
468 case OMAPFB_COLOR_YUY422:
469 var->bits_per_pixel = 16;
470 plane->color_mode = var->nonstd;
471 return 0;
472 default:
473 return -EINVAL;
474 }
475
476 switch (var->bits_per_pixel) {
477 case 1:
478 plane->color_mode = OMAPFB_COLOR_CLUT_1BPP;
479 return 0;
480 case 2:
481 plane->color_mode = OMAPFB_COLOR_CLUT_2BPP;
482 return 0;
483 case 4:
484 plane->color_mode = OMAPFB_COLOR_CLUT_4BPP;
485 return 0;
486 case 8:
487 plane->color_mode = OMAPFB_COLOR_CLUT_8BPP;
488 return 0;
489 case 12:
490 var->bits_per_pixel = 16;
491 case 16:
492 if (plane->fbdev->panel->bpp == 12)
493 plane->color_mode = OMAPFB_COLOR_RGB444;
494 else
495 plane->color_mode = OMAPFB_COLOR_RGB565;
496 return 0;
497 default:
498 return -EINVAL;
499 }
500 }
501
502 /*
503 * Check the values in var against our capabilities and in case of out of
504 * bound values try to adjust them.
505 */
506 static int set_fb_var(struct fb_info *fbi,
507 struct fb_var_screeninfo *var)
508 {
509 int bpp;
510 unsigned long max_frame_size;
511 unsigned long line_size;
512 int xres_min, xres_max;
513 int yres_min, yres_max;
514 struct omapfb_plane_struct *plane = fbi->par;
515 struct omapfb_device *fbdev = plane->fbdev;
516 struct lcd_panel *panel = fbdev->panel;
517
518 if (set_color_mode(plane, var) < 0)
519 return -EINVAL;
520
521 bpp = var->bits_per_pixel;
522 if (plane->color_mode == OMAPFB_COLOR_RGB444)
523 bpp = 16;
524
525 switch (var->rotate) {
526 case 0:
527 case 180:
528 xres_min = OMAPFB_PLANE_XRES_MIN;
529 xres_max = panel->x_res;
530 yres_min = OMAPFB_PLANE_YRES_MIN;
531 yres_max = panel->y_res;
532 if (cpu_is_omap15xx()) {
533 var->xres = panel->x_res;
534 var->yres = panel->y_res;
535 }
536 break;
537 case 90:
538 case 270:
539 xres_min = OMAPFB_PLANE_YRES_MIN;
540 xres_max = panel->y_res;
541 yres_min = OMAPFB_PLANE_XRES_MIN;
542 yres_max = panel->x_res;
543 if (cpu_is_omap15xx()) {
544 var->xres = panel->y_res;
545 var->yres = panel->x_res;
546 }
547 break;
548 default:
549 return -EINVAL;
550 }
551
552 if (var->xres < xres_min)
553 var->xres = xres_min;
554 if (var->yres < yres_min)
555 var->yres = yres_min;
556 if (var->xres > xres_max)
557 var->xres = xres_max;
558 if (var->yres > yres_max)
559 var->yres = yres_max;
560
561 if (var->xres_virtual < var->xres)
562 var->xres_virtual = var->xres;
563 if (var->yres_virtual < var->yres)
564 var->yres_virtual = var->yres;
565 max_frame_size = fbdev->mem_desc.region[plane->idx].size;
566 line_size = var->xres_virtual * bpp / 8;
567 if (line_size * var->yres_virtual > max_frame_size) {
568 /* Try to keep yres_virtual first */
569 line_size = max_frame_size / var->yres_virtual;
570 var->xres_virtual = line_size * 8 / bpp;
571 if (var->xres_virtual < var->xres) {
572 /* Still doesn't fit. Shrink yres_virtual too */
573 var->xres_virtual = var->xres;
574 line_size = var->xres * bpp / 8;
575 var->yres_virtual = max_frame_size / line_size;
576 }
577 /* Recheck this, as the virtual size changed. */
578 if (var->xres_virtual < var->xres)
579 var->xres = var->xres_virtual;
580 if (var->yres_virtual < var->yres)
581 var->yres = var->yres_virtual;
582 if (var->xres < xres_min || var->yres < yres_min)
583 return -EINVAL;
584 }
585 if (var->xres + var->xoffset > var->xres_virtual)
586 var->xoffset = var->xres_virtual - var->xres;
587 if (var->yres + var->yoffset > var->yres_virtual)
588 var->yoffset = var->yres_virtual - var->yres;
589
590 if (plane->color_mode == OMAPFB_COLOR_RGB444) {
591 var->red.offset = 8; var->red.length = 4;
592 var->red.msb_right = 0;
593 var->green.offset = 4; var->green.length = 4;
594 var->green.msb_right = 0;
595 var->blue.offset = 0; var->blue.length = 4;
596 var->blue.msb_right = 0;
597 } else {
598 var->red.offset = 11; var->red.length = 5;
599 var->red.msb_right = 0;
600 var->green.offset = 5; var->green.length = 6;
601 var->green.msb_right = 0;
602 var->blue.offset = 0; var->blue.length = 5;
603 var->blue.msb_right = 0;
604 }
605
606 var->height = -1;
607 var->width = -1;
608 var->grayscale = 0;
609
610 /* pixclock in ps, the rest in pixclock */
611 var->pixclock = 10000000 / (panel->pixel_clock / 100);
612 var->left_margin = panel->hfp;
613 var->right_margin = panel->hbp;
614 var->upper_margin = panel->vfp;
615 var->lower_margin = panel->vbp;
616 var->hsync_len = panel->hsw;
617 var->vsync_len = panel->vsw;
618
619 /* TODO: get these from panel->config */
620 var->vmode = FB_VMODE_NONINTERLACED;
621 var->sync = 0;
622
623 return 0;
624 }
625
626
627 /* Set rotation (0, 90, 180, 270 degree), and switch to the new mode. */
628 static void omapfb_rotate(struct fb_info *fbi, int rotate)
629 {
630 struct omapfb_plane_struct *plane = fbi->par;
631 struct omapfb_device *fbdev = plane->fbdev;
632
633 omapfb_rqueue_lock(fbdev);
634 if (rotate != fbi->var.rotate) {
635 struct fb_var_screeninfo *new_var = &fbdev->new_var;
636
637 memcpy(new_var, &fbi->var, sizeof(*new_var));
638 new_var->rotate = rotate;
639 if (set_fb_var(fbi, new_var) == 0 &&
640 memcmp(new_var, &fbi->var, sizeof(*new_var))) {
641 memcpy(&fbi->var, new_var, sizeof(*new_var));
642 ctrl_change_mode(fbi);
643 }
644 }
645 omapfb_rqueue_unlock(fbdev);
646 }
647
648 /*
649 * Set new x,y offsets in the virtual display for the visible area and switch
650 * to the new mode.
651 */
652 static int omapfb_pan_display(struct fb_var_screeninfo *var,
653 struct fb_info *fbi)
654 {
655 struct omapfb_plane_struct *plane = fbi->par;
656 struct omapfb_device *fbdev = plane->fbdev;
657 int r = 0;
658
659 omapfb_rqueue_lock(fbdev);
660 if (var->xoffset != fbi->var.xoffset ||
661 var->yoffset != fbi->var.yoffset) {
662 struct fb_var_screeninfo *new_var = &fbdev->new_var;
663
664 memcpy(new_var, &fbi->var, sizeof(*new_var));
665 new_var->xoffset = var->xoffset;
666 new_var->yoffset = var->yoffset;
667 if (set_fb_var(fbi, new_var))
668 r = -EINVAL;
669 else {
670 memcpy(&fbi->var, new_var, sizeof(*new_var));
671 ctrl_change_mode(fbi);
672 }
673 }
674 omapfb_rqueue_unlock(fbdev);
675
676 return r;
677 }
678
679 /* Set mirror to vertical axis and switch to the new mode. */
680 static int omapfb_mirror(struct fb_info *fbi, int mirror)
681 {
682 struct omapfb_plane_struct *plane = fbi->par;
683 struct omapfb_device *fbdev = plane->fbdev;
684 int r = 0;
685
686 omapfb_rqueue_lock(fbdev);
687 mirror = mirror ? 1 : 0;
688 if (cpu_is_omap15xx())
689 r = -EINVAL;
690 else if (mirror != plane->info.mirror) {
691 plane->info.mirror = mirror;
692 r = ctrl_change_mode(fbi);
693 }
694 omapfb_rqueue_unlock(fbdev);
695
696 return r;
697 }
698
699 /*
700 * Check values in var, try to adjust them in case of out of bound values if
701 * possible, or return error.
702 */
703 static int omapfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
704 {
705 struct omapfb_plane_struct *plane = fbi->par;
706 struct omapfb_device *fbdev = plane->fbdev;
707 int r;
708
709 omapfb_rqueue_lock(fbdev);
710 if (fbdev->ctrl->sync != NULL)
711 fbdev->ctrl->sync();
712 r = set_fb_var(fbi, var);
713 omapfb_rqueue_unlock(fbdev);
714
715 return r;
716 }
717
718 /*
719 * Switch to a new mode. The parameters for it has been check already by
720 * omapfb_check_var.
721 */
722 static int omapfb_set_par(struct fb_info *fbi)
723 {
724 struct omapfb_plane_struct *plane = fbi->par;
725 struct omapfb_device *fbdev = plane->fbdev;
726 int r = 0;
727
728 omapfb_rqueue_lock(fbdev);
729 set_fb_fix(fbi, 0);
730 r = ctrl_change_mode(fbi);
731 omapfb_rqueue_unlock(fbdev);
732
733 return r;
734 }
735
736 int omapfb_update_window_async(struct fb_info *fbi,
737 struct omapfb_update_window *win,
738 void (*callback)(void *),
739 void *callback_data)
740 {
741 int xres, yres;
742 struct omapfb_plane_struct *plane = fbi->par;
743 struct omapfb_device *fbdev = plane->fbdev;
744 struct fb_var_screeninfo *var = &fbi->var;
745
746 switch (var->rotate) {
747 case 0:
748 case 180:
749 xres = fbdev->panel->x_res;
750 yres = fbdev->panel->y_res;
751 break;
752 case 90:
753 case 270:
754 xres = fbdev->panel->y_res;
755 yres = fbdev->panel->x_res;
756 break;
757 default:
758 return -EINVAL;
759 }
760
761 if (win->x >= xres || win->y >= yres ||
762 win->out_x > xres || win->out_y > yres)
763 return -EINVAL;
764
765 if (!fbdev->ctrl->update_window ||
766 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
767 return -ENODEV;
768
769 if (win->x + win->width > xres)
770 win->width = xres - win->x;
771 if (win->y + win->height > yres)
772 win->height = yres - win->y;
773 if (win->out_x + win->out_width > xres)
774 win->out_width = xres - win->out_x;
775 if (win->out_y + win->out_height > yres)
776 win->out_height = yres - win->out_y;
777 if (!win->width || !win->height || !win->out_width || !win->out_height)
778 return 0;
779
780 return fbdev->ctrl->update_window(fbi, win, callback, callback_data);
781 }
782 EXPORT_SYMBOL(omapfb_update_window_async);
783
784 static int omapfb_update_win(struct fb_info *fbi,
785 struct omapfb_update_window *win)
786 {
787 struct omapfb_plane_struct *plane = fbi->par;
788 int ret;
789
790 omapfb_rqueue_lock(plane->fbdev);
791 ret = omapfb_update_window_async(fbi, win, NULL, NULL);
792 omapfb_rqueue_unlock(plane->fbdev);
793
794 return ret;
795 }
796
797 static int omapfb_update_full_screen(struct fb_info *fbi)
798 {
799 struct omapfb_plane_struct *plane = fbi->par;
800 struct omapfb_device *fbdev = plane->fbdev;
801 struct omapfb_update_window win;
802 int r;
803
804 if (!fbdev->ctrl->update_window ||
805 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
806 return -ENODEV;
807
808 win.x = 0;
809 win.y = 0;
810 win.width = fbi->var.xres;
811 win.height = fbi->var.yres;
812 win.out_x = 0;
813 win.out_y = 0;
814 win.out_width = fbi->var.xres;
815 win.out_height = fbi->var.yres;
816 win.format = 0;
817
818 omapfb_rqueue_lock(fbdev);
819 r = fbdev->ctrl->update_window(fbi, &win, NULL, NULL);
820 omapfb_rqueue_unlock(fbdev);
821
822 return r;
823 }
824
825 static int omapfb_setup_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
826 {
827 struct omapfb_plane_struct *plane = fbi->par;
828 struct omapfb_device *fbdev = plane->fbdev;
829 struct lcd_panel *panel = fbdev->panel;
830 struct omapfb_plane_info old_info;
831 int r = 0;
832
833 if (pi->pos_x + pi->out_width > panel->x_res ||
834 pi->pos_y + pi->out_height > panel->y_res)
835 return -EINVAL;
836
837 omapfb_rqueue_lock(fbdev);
838 if (pi->enabled && !fbdev->mem_desc.region[plane->idx].size) {
839 /*
840 * This plane's memory was freed, can't enable it
841 * until it's reallocated.
842 */
843 r = -EINVAL;
844 goto out;
845 }
846 old_info = plane->info;
847 plane->info = *pi;
848 if (pi->enabled) {
849 r = ctrl_change_mode(fbi);
850 if (r < 0) {
851 plane->info = old_info;
852 goto out;
853 }
854 }
855 r = fbdev->ctrl->enable_plane(plane->idx, pi->enabled);
856 if (r < 0) {
857 plane->info = old_info;
858 goto out;
859 }
860 out:
861 omapfb_rqueue_unlock(fbdev);
862 return r;
863 }
864
865 static int omapfb_query_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
866 {
867 struct omapfb_plane_struct *plane = fbi->par;
868
869 *pi = plane->info;
870 return 0;
871 }
872
873 static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
874 {
875 struct omapfb_plane_struct *plane = fbi->par;
876 struct omapfb_device *fbdev = plane->fbdev;
877 struct omapfb_mem_region *rg = &fbdev->mem_desc.region[plane->idx];
878 size_t size;
879 int r = 0;
880
881 if (fbdev->ctrl->setup_mem == NULL)
882 return -ENODEV;
883 if (mi->type > OMAPFB_MEMTYPE_MAX)
884 return -EINVAL;
885
886 size = PAGE_ALIGN(mi->size);
887 omapfb_rqueue_lock(fbdev);
888 if (plane->info.enabled) {
889 r = -EBUSY;
890 goto out;
891 }
892 if (rg->size != size || rg->type != mi->type) {
893 struct fb_var_screeninfo *new_var = &fbdev->new_var;
894 unsigned long old_size = rg->size;
895 u8 old_type = rg->type;
896 unsigned long paddr;
897
898 rg->size = size;
899 rg->type = mi->type;
900 /*
901 * size == 0 is a special case, for which we
902 * don't check / adjust the screen parameters.
903 * This isn't a problem since the plane can't
904 * be reenabled unless its size is > 0.
905 */
906 if (old_size != size && size) {
907 if (size) {
908 memcpy(new_var, &fbi->var, sizeof(*new_var));
909 r = set_fb_var(fbi, new_var);
910 if (r < 0)
911 goto out;
912 }
913 }
914
915 if (fbdev->ctrl->sync)
916 fbdev->ctrl->sync();
917 r = fbdev->ctrl->setup_mem(plane->idx, size, mi->type, &paddr);
918 if (r < 0) {
919 /* Revert changes. */
920 rg->size = old_size;
921 rg->type = old_type;
922 goto out;
923 }
924 rg->paddr = paddr;
925
926 if (old_size != size) {
927 if (size) {
928 memcpy(&fbi->var, new_var, sizeof(fbi->var));
929 set_fb_fix(fbi, 0);
930 } else {
931 /*
932 * Set these explicitly to indicate that the
933 * plane memory is dealloce'd, the other
934 * screen parameters in var / fix are invalid.
935 */
936 mutex_lock(&fbi->mm_lock);
937 fbi->fix.smem_start = 0;
938 fbi->fix.smem_len = 0;
939 mutex_unlock(&fbi->mm_lock);
940 }
941 }
942 }
943 out:
944 omapfb_rqueue_unlock(fbdev);
945
946 return r;
947 }
948
949 static int omapfb_query_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
950 {
951 struct omapfb_plane_struct *plane = fbi->par;
952 struct omapfb_device *fbdev = plane->fbdev;
953 struct omapfb_mem_region *rg;
954
955 rg = &fbdev->mem_desc.region[plane->idx];
956 memset(mi, 0, sizeof(*mi));
957 mi->size = rg->size;
958 mi->type = rg->type;
959
960 return 0;
961 }
962
963 static int omapfb_set_color_key(struct omapfb_device *fbdev,
964 struct omapfb_color_key *ck)
965 {
966 int r;
967
968 if (!fbdev->ctrl->set_color_key)
969 return -ENODEV;
970
971 omapfb_rqueue_lock(fbdev);
972 r = fbdev->ctrl->set_color_key(ck);
973 omapfb_rqueue_unlock(fbdev);
974
975 return r;
976 }
977
978 static int omapfb_get_color_key(struct omapfb_device *fbdev,
979 struct omapfb_color_key *ck)
980 {
981 int r;
982
983 if (!fbdev->ctrl->get_color_key)
984 return -ENODEV;
985
986 omapfb_rqueue_lock(fbdev);
987 r = fbdev->ctrl->get_color_key(ck);
988 omapfb_rqueue_unlock(fbdev);
989
990 return r;
991 }
992
993 static struct blocking_notifier_head omapfb_client_list[OMAPFB_PLANE_NUM];
994 static int notifier_inited;
995
996 static void omapfb_init_notifier(void)
997 {
998 int i;
999
1000 for (i = 0; i < OMAPFB_PLANE_NUM; i++)
1001 BLOCKING_INIT_NOTIFIER_HEAD(&omapfb_client_list[i]);
1002 }
1003
1004 int omapfb_register_client(struct omapfb_notifier_block *omapfb_nb,
1005 omapfb_notifier_callback_t callback,
1006 void *callback_data)
1007 {
1008 int r;
1009
1010 if ((unsigned)omapfb_nb->plane_idx > OMAPFB_PLANE_NUM)
1011 return -EINVAL;
1012
1013 if (!notifier_inited) {
1014 omapfb_init_notifier();
1015 notifier_inited = 1;
1016 }
1017
1018 omapfb_nb->nb.notifier_call = (int (*)(struct notifier_block *,
1019 unsigned long, void *))callback;
1020 omapfb_nb->data = callback_data;
1021 r = blocking_notifier_chain_register(
1022 &omapfb_client_list[omapfb_nb->plane_idx],
1023 &omapfb_nb->nb);
1024 if (r)
1025 return r;
1026 if (omapfb_dev != NULL &&
1027 omapfb_dev->ctrl && omapfb_dev->ctrl->bind_client) {
1028 omapfb_dev->ctrl->bind_client(omapfb_nb);
1029 }
1030
1031 return 0;
1032 }
1033 EXPORT_SYMBOL(omapfb_register_client);
1034
1035 int omapfb_unregister_client(struct omapfb_notifier_block *omapfb_nb)
1036 {
1037 return blocking_notifier_chain_unregister(
1038 &omapfb_client_list[omapfb_nb->plane_idx], &omapfb_nb->nb);
1039 }
1040 EXPORT_SYMBOL(omapfb_unregister_client);
1041
1042 void omapfb_notify_clients(struct omapfb_device *fbdev, unsigned long event)
1043 {
1044 int i;
1045
1046 if (!notifier_inited)
1047 /* no client registered yet */
1048 return;
1049
1050 for (i = 0; i < OMAPFB_PLANE_NUM; i++)
1051 blocking_notifier_call_chain(&omapfb_client_list[i], event,
1052 fbdev->fb_info[i]);
1053 }
1054 EXPORT_SYMBOL(omapfb_notify_clients);
1055
1056 static int omapfb_set_update_mode(struct omapfb_device *fbdev,
1057 enum omapfb_update_mode mode)
1058 {
1059 int r;
1060
1061 omapfb_rqueue_lock(fbdev);
1062 r = fbdev->ctrl->set_update_mode(mode);
1063 omapfb_rqueue_unlock(fbdev);
1064
1065 return r;
1066 }
1067
1068 static enum omapfb_update_mode omapfb_get_update_mode(struct omapfb_device *fbdev)
1069 {
1070 int r;
1071
1072 omapfb_rqueue_lock(fbdev);
1073 r = fbdev->ctrl->get_update_mode();
1074 omapfb_rqueue_unlock(fbdev);
1075
1076 return r;
1077 }
1078
1079 static void omapfb_get_caps(struct omapfb_device *fbdev, int plane,
1080 struct omapfb_caps *caps)
1081 {
1082 memset(caps, 0, sizeof(*caps));
1083 fbdev->ctrl->get_caps(plane, caps);
1084 caps->ctrl |= fbdev->panel->get_caps(fbdev->panel);
1085 }
1086
1087 /* For lcd testing */
1088 void omapfb_write_first_pixel(struct omapfb_device *fbdev, u16 pixval)
1089 {
1090 omapfb_rqueue_lock(fbdev);
1091 *(u16 *)fbdev->mem_desc.region[0].vaddr = pixval;
1092 if (fbdev->ctrl->get_update_mode() == OMAPFB_MANUAL_UPDATE) {
1093 struct omapfb_update_window win;
1094
1095 memset(&win, 0, sizeof(win));
1096 win.width = 2;
1097 win.height = 2;
1098 win.out_width = 2;
1099 win.out_height = 2;
1100 fbdev->ctrl->update_window(fbdev->fb_info[0], &win, NULL, NULL);
1101 }
1102 omapfb_rqueue_unlock(fbdev);
1103 }
1104 EXPORT_SYMBOL(omapfb_write_first_pixel);
1105
1106 /*
1107 * Ioctl interface. Part of the kernel mode frame buffer API is duplicated
1108 * here to be accessible by user mode code.
1109 */
1110 static int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd,
1111 unsigned long arg)
1112 {
1113 struct omapfb_plane_struct *plane = fbi->par;
1114 struct omapfb_device *fbdev = plane->fbdev;
1115 struct fb_ops *ops = fbi->fbops;
1116 union {
1117 struct omapfb_update_window update_window;
1118 struct omapfb_plane_info plane_info;
1119 struct omapfb_mem_info mem_info;
1120 struct omapfb_color_key color_key;
1121 enum omapfb_update_mode update_mode;
1122 struct omapfb_caps caps;
1123 unsigned int mirror;
1124 int plane_out;
1125 int enable_plane;
1126 } p;
1127 int r = 0;
1128
1129 BUG_ON(!ops);
1130 switch (cmd) {
1131 case OMAPFB_MIRROR:
1132 if (get_user(p.mirror, (int __user *)arg))
1133 r = -EFAULT;
1134 else
1135 omapfb_mirror(fbi, p.mirror);
1136 break;
1137 case OMAPFB_SYNC_GFX:
1138 omapfb_sync(fbi);
1139 break;
1140 case OMAPFB_VSYNC:
1141 break;
1142 case OMAPFB_SET_UPDATE_MODE:
1143 if (get_user(p.update_mode, (int __user *)arg))
1144 r = -EFAULT;
1145 else
1146 r = omapfb_set_update_mode(fbdev, p.update_mode);
1147 break;
1148 case OMAPFB_GET_UPDATE_MODE:
1149 p.update_mode = omapfb_get_update_mode(fbdev);
1150 if (put_user(p.update_mode,
1151 (enum omapfb_update_mode __user *)arg))
1152 r = -EFAULT;
1153 break;
1154 case OMAPFB_UPDATE_WINDOW_OLD:
1155 if (copy_from_user(&p.update_window, (void __user *)arg,
1156 sizeof(struct omapfb_update_window_old)))
1157 r = -EFAULT;
1158 else {
1159 struct omapfb_update_window *u = &p.update_window;
1160 u->out_x = u->x;
1161 u->out_y = u->y;
1162 u->out_width = u->width;
1163 u->out_height = u->height;
1164 memset(u->reserved, 0, sizeof(u->reserved));
1165 r = omapfb_update_win(fbi, u);
1166 }
1167 break;
1168 case OMAPFB_UPDATE_WINDOW:
1169 if (copy_from_user(&p.update_window, (void __user *)arg,
1170 sizeof(p.update_window)))
1171 r = -EFAULT;
1172 else
1173 r = omapfb_update_win(fbi, &p.update_window);
1174 break;
1175 case OMAPFB_SETUP_PLANE:
1176 if (copy_from_user(&p.plane_info, (void __user *)arg,
1177 sizeof(p.plane_info)))
1178 r = -EFAULT;
1179 else
1180 r = omapfb_setup_plane(fbi, &p.plane_info);
1181 break;
1182 case OMAPFB_QUERY_PLANE:
1183 if ((r = omapfb_query_plane(fbi, &p.plane_info)) < 0)
1184 break;
1185 if (copy_to_user((void __user *)arg, &p.plane_info,
1186 sizeof(p.plane_info)))
1187 r = -EFAULT;
1188 break;
1189 case OMAPFB_SETUP_MEM:
1190 if (copy_from_user(&p.mem_info, (void __user *)arg,
1191 sizeof(p.mem_info)))
1192 r = -EFAULT;
1193 else
1194 r = omapfb_setup_mem(fbi, &p.mem_info);
1195 break;
1196 case OMAPFB_QUERY_MEM:
1197 if ((r = omapfb_query_mem(fbi, &p.mem_info)) < 0)
1198 break;
1199 if (copy_to_user((void __user *)arg, &p.mem_info,
1200 sizeof(p.mem_info)))
1201 r = -EFAULT;
1202 break;
1203 case OMAPFB_SET_COLOR_KEY:
1204 if (copy_from_user(&p.color_key, (void __user *)arg,
1205 sizeof(p.color_key)))
1206 r = -EFAULT;
1207 else
1208 r = omapfb_set_color_key(fbdev, &p.color_key);
1209 break;
1210 case OMAPFB_GET_COLOR_KEY:
1211 if ((r = omapfb_get_color_key(fbdev, &p.color_key)) < 0)
1212 break;
1213 if (copy_to_user((void __user *)arg, &p.color_key,
1214 sizeof(p.color_key)))
1215 r = -EFAULT;
1216 break;
1217 case OMAPFB_GET_CAPS:
1218 omapfb_get_caps(fbdev, plane->idx, &p.caps);
1219 if (copy_to_user((void __user *)arg, &p.caps, sizeof(p.caps)))
1220 r = -EFAULT;
1221 break;
1222 case OMAPFB_LCD_TEST:
1223 {
1224 int test_num;
1225
1226 if (get_user(test_num, (int __user *)arg)) {
1227 r = -EFAULT;
1228 break;
1229 }
1230 if (!fbdev->panel->run_test) {
1231 r = -EINVAL;
1232 break;
1233 }
1234 r = fbdev->panel->run_test(fbdev->panel, test_num);
1235 break;
1236 }
1237 case OMAPFB_CTRL_TEST:
1238 {
1239 int test_num;
1240
1241 if (get_user(test_num, (int __user *)arg)) {
1242 r = -EFAULT;
1243 break;
1244 }
1245 if (!fbdev->ctrl->run_test) {
1246 r = -EINVAL;
1247 break;
1248 }
1249 r = fbdev->ctrl->run_test(test_num);
1250 break;
1251 }
1252 default:
1253 r = -EINVAL;
1254 }
1255
1256 return r;
1257 }
1258
1259 static int omapfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
1260 {
1261 struct omapfb_plane_struct *plane = info->par;
1262 struct omapfb_device *fbdev = plane->fbdev;
1263 int r;
1264
1265 omapfb_rqueue_lock(fbdev);
1266 r = fbdev->ctrl->mmap(info, vma);
1267 omapfb_rqueue_unlock(fbdev);
1268
1269 return r;
1270 }
1271
1272 /*
1273 * Callback table for the frame buffer framework. Some of these pointers
1274 * will be changed according to the current setting of fb_info->accel_flags.
1275 */
1276 static struct fb_ops omapfb_ops = {
1277 .owner = THIS_MODULE,
1278 .fb_open = omapfb_open,
1279 .fb_release = omapfb_release,
1280 .fb_setcolreg = omapfb_setcolreg,
1281 .fb_setcmap = omapfb_setcmap,
1282 .fb_fillrect = cfb_fillrect,
1283 .fb_copyarea = cfb_copyarea,
1284 .fb_imageblit = cfb_imageblit,
1285 .fb_blank = omapfb_blank,
1286 .fb_ioctl = omapfb_ioctl,
1287 .fb_check_var = omapfb_check_var,
1288 .fb_set_par = omapfb_set_par,
1289 .fb_rotate = omapfb_rotate,
1290 .fb_pan_display = omapfb_pan_display,
1291 };
1292
1293 /*
1294 * ---------------------------------------------------------------------------
1295 * Sysfs interface
1296 * ---------------------------------------------------------------------------
1297 */
1298 /* omapfbX sysfs entries */
1299 static ssize_t omapfb_show_caps_num(struct device *dev,
1300 struct device_attribute *attr, char *buf)
1301 {
1302 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1303 int plane;
1304 size_t size;
1305 struct omapfb_caps caps;
1306
1307 plane = 0;
1308 size = 0;
1309 while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1310 omapfb_get_caps(fbdev, plane, &caps);
1311 size += snprintf(&buf[size], PAGE_SIZE - size,
1312 "plane#%d %#010x %#010x %#010x\n",
1313 plane, caps.ctrl, caps.plane_color, caps.wnd_color);
1314 plane++;
1315 }
1316 return size;
1317 }
1318
1319 static ssize_t omapfb_show_caps_text(struct device *dev,
1320 struct device_attribute *attr, char *buf)
1321 {
1322 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1323 int i;
1324 struct omapfb_caps caps;
1325 int plane;
1326 size_t size;
1327
1328 plane = 0;
1329 size = 0;
1330 while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1331 omapfb_get_caps(fbdev, plane, &caps);
1332 size += snprintf(&buf[size], PAGE_SIZE - size,
1333 "plane#%d:\n", plane);
1334 for (i = 0; i < ARRAY_SIZE(ctrl_caps) &&
1335 size < PAGE_SIZE; i++) {
1336 if (ctrl_caps[i].flag & caps.ctrl)
1337 size += snprintf(&buf[size], PAGE_SIZE - size,
1338 " %s\n", ctrl_caps[i].name);
1339 }
1340 size += snprintf(&buf[size], PAGE_SIZE - size,
1341 " plane colors:\n");
1342 for (i = 0; i < ARRAY_SIZE(color_caps) &&
1343 size < PAGE_SIZE; i++) {
1344 if (color_caps[i].flag & caps.plane_color)
1345 size += snprintf(&buf[size], PAGE_SIZE - size,
1346 " %s\n", color_caps[i].name);
1347 }
1348 size += snprintf(&buf[size], PAGE_SIZE - size,
1349 " window colors:\n");
1350 for (i = 0; i < ARRAY_SIZE(color_caps) &&
1351 size < PAGE_SIZE; i++) {
1352 if (color_caps[i].flag & caps.wnd_color)
1353 size += snprintf(&buf[size], PAGE_SIZE - size,
1354 " %s\n", color_caps[i].name);
1355 }
1356
1357 plane++;
1358 }
1359 return size;
1360 }
1361
1362 static DEVICE_ATTR(caps_num, 0444, omapfb_show_caps_num, NULL);
1363 static DEVICE_ATTR(caps_text, 0444, omapfb_show_caps_text, NULL);
1364
1365 /* panel sysfs entries */
1366 static ssize_t omapfb_show_panel_name(struct device *dev,
1367 struct device_attribute *attr, char *buf)
1368 {
1369 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1370
1371 return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->panel->name);
1372 }
1373
1374 static ssize_t omapfb_show_bklight_level(struct device *dev,
1375 struct device_attribute *attr,
1376 char *buf)
1377 {
1378 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1379 int r;
1380
1381 if (fbdev->panel->get_bklight_level) {
1382 r = snprintf(buf, PAGE_SIZE, "%d\n",
1383 fbdev->panel->get_bklight_level(fbdev->panel));
1384 } else
1385 r = -ENODEV;
1386 return r;
1387 }
1388
1389 static ssize_t omapfb_store_bklight_level(struct device *dev,
1390 struct device_attribute *attr,
1391 const char *buf, size_t size)
1392 {
1393 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1394 int r;
1395
1396 if (fbdev->panel->set_bklight_level) {
1397 unsigned int level;
1398
1399 if (sscanf(buf, "%10d", &level) == 1) {
1400 r = fbdev->panel->set_bklight_level(fbdev->panel,
1401 level);
1402 } else
1403 r = -EINVAL;
1404 } else
1405 r = -ENODEV;
1406 return r ? r : size;
1407 }
1408
1409 static ssize_t omapfb_show_bklight_max(struct device *dev,
1410 struct device_attribute *attr, char *buf)
1411 {
1412 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1413 int r;
1414
1415 if (fbdev->panel->get_bklight_level) {
1416 r = snprintf(buf, PAGE_SIZE, "%d\n",
1417 fbdev->panel->get_bklight_max(fbdev->panel));
1418 } else
1419 r = -ENODEV;
1420 return r;
1421 }
1422
1423 static struct device_attribute dev_attr_panel_name =
1424 __ATTR(name, 0444, omapfb_show_panel_name, NULL);
1425 static DEVICE_ATTR(backlight_level, 0664,
1426 omapfb_show_bklight_level, omapfb_store_bklight_level);
1427 static DEVICE_ATTR(backlight_max, 0444, omapfb_show_bklight_max, NULL);
1428
1429 static struct attribute *panel_attrs[] = {
1430 &dev_attr_panel_name.attr,
1431 &dev_attr_backlight_level.attr,
1432 &dev_attr_backlight_max.attr,
1433 NULL,
1434 };
1435
1436 static struct attribute_group panel_attr_grp = {
1437 .name = "panel",
1438 .attrs = panel_attrs,
1439 };
1440
1441 /* ctrl sysfs entries */
1442 static ssize_t omapfb_show_ctrl_name(struct device *dev,
1443 struct device_attribute *attr, char *buf)
1444 {
1445 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1446
1447 return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->ctrl->name);
1448 }
1449
1450 static struct device_attribute dev_attr_ctrl_name =
1451 __ATTR(name, 0444, omapfb_show_ctrl_name, NULL);
1452
1453 static struct attribute *ctrl_attrs[] = {
1454 &dev_attr_ctrl_name.attr,
1455 NULL,
1456 };
1457
1458 static struct attribute_group ctrl_attr_grp = {
1459 .name = "ctrl",
1460 .attrs = ctrl_attrs,
1461 };
1462
1463 static int omapfb_register_sysfs(struct omapfb_device *fbdev)
1464 {
1465 int r;
1466
1467 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_num)))
1468 goto fail0;
1469
1470 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_text)))
1471 goto fail1;
1472
1473 if ((r = sysfs_create_group(&fbdev->dev->kobj, &panel_attr_grp)))
1474 goto fail2;
1475
1476 if ((r = sysfs_create_group(&fbdev->dev->kobj, &ctrl_attr_grp)))
1477 goto fail3;
1478
1479 return 0;
1480 fail3:
1481 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1482 fail2:
1483 device_remove_file(fbdev->dev, &dev_attr_caps_text);
1484 fail1:
1485 device_remove_file(fbdev->dev, &dev_attr_caps_num);
1486 fail0:
1487 dev_err(fbdev->dev, "unable to register sysfs interface\n");
1488 return r;
1489 }
1490
1491 static void omapfb_unregister_sysfs(struct omapfb_device *fbdev)
1492 {
1493 sysfs_remove_group(&fbdev->dev->kobj, &ctrl_attr_grp);
1494 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1495 device_remove_file(fbdev->dev, &dev_attr_caps_num);
1496 device_remove_file(fbdev->dev, &dev_attr_caps_text);
1497 }
1498
1499 /*
1500 * ---------------------------------------------------------------------------
1501 * LDM callbacks
1502 * ---------------------------------------------------------------------------
1503 */
1504 /* Initialize system fb_info object and set the default video mode.
1505 * The frame buffer memory already allocated by lcddma_init
1506 */
1507 static int fbinfo_init(struct omapfb_device *fbdev, struct fb_info *info)
1508 {
1509 struct fb_var_screeninfo *var = &info->var;
1510 struct fb_fix_screeninfo *fix = &info->fix;
1511 int r = 0;
1512
1513 info->fbops = &omapfb_ops;
1514 info->flags = FBINFO_FLAG_DEFAULT;
1515
1516 strncpy(fix->id, MODULE_NAME, sizeof(fix->id));
1517
1518 info->pseudo_palette = fbdev->pseudo_palette;
1519
1520 var->accel_flags = def_accel ? FB_ACCELF_TEXT : 0;
1521 var->xres = def_vxres;
1522 var->yres = def_vyres;
1523 var->xres_virtual = def_vxres;
1524 var->yres_virtual = def_vyres;
1525 var->rotate = def_rotate;
1526 var->bits_per_pixel = fbdev->panel->bpp;
1527
1528 set_fb_var(info, var);
1529 set_fb_fix(info, 1);
1530
1531 r = fb_alloc_cmap(&info->cmap, 16, 0);
1532 if (r != 0)
1533 dev_err(fbdev->dev, "unable to allocate color map memory\n");
1534
1535 return r;
1536 }
1537
1538 /* Release the fb_info object */
1539 static void fbinfo_cleanup(struct omapfb_device *fbdev, struct fb_info *fbi)
1540 {
1541 fb_dealloc_cmap(&fbi->cmap);
1542 }
1543
1544 static void planes_cleanup(struct omapfb_device *fbdev)
1545 {
1546 int i;
1547
1548 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1549 if (fbdev->fb_info[i] == NULL)
1550 break;
1551 fbinfo_cleanup(fbdev, fbdev->fb_info[i]);
1552 framebuffer_release(fbdev->fb_info[i]);
1553 }
1554 }
1555
1556 static int planes_init(struct omapfb_device *fbdev)
1557 {
1558 struct fb_info *fbi;
1559 int i;
1560 int r;
1561
1562 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1563 struct omapfb_plane_struct *plane;
1564 fbi = framebuffer_alloc(sizeof(struct omapfb_plane_struct),
1565 fbdev->dev);
1566 if (fbi == NULL) {
1567 dev_err(fbdev->dev,
1568 "unable to allocate memory for plane info\n");
1569 planes_cleanup(fbdev);
1570 return -ENOMEM;
1571 }
1572 plane = fbi->par;
1573 plane->idx = i;
1574 plane->fbdev = fbdev;
1575 plane->info.mirror = def_mirror;
1576 fbdev->fb_info[i] = fbi;
1577
1578 if ((r = fbinfo_init(fbdev, fbi)) < 0) {
1579 framebuffer_release(fbi);
1580 planes_cleanup(fbdev);
1581 return r;
1582 }
1583 plane->info.out_width = fbi->var.xres;
1584 plane->info.out_height = fbi->var.yres;
1585 }
1586 return 0;
1587 }
1588
1589 /*
1590 * Free driver resources. Can be called to rollback an aborted initialization
1591 * sequence.
1592 */
1593 static void omapfb_free_resources(struct omapfb_device *fbdev, int state)
1594 {
1595 int i;
1596
1597 switch (state) {
1598 case OMAPFB_ACTIVE:
1599 for (i = 0; i < fbdev->mem_desc.region_cnt; i++)
1600 unregister_framebuffer(fbdev->fb_info[i]);
1601 case 7:
1602 omapfb_unregister_sysfs(fbdev);
1603 case 6:
1604 fbdev->panel->disable(fbdev->panel);
1605 case 5:
1606 omapfb_set_update_mode(fbdev, OMAPFB_UPDATE_DISABLED);
1607 case 4:
1608 planes_cleanup(fbdev);
1609 case 3:
1610 ctrl_cleanup(fbdev);
1611 case 2:
1612 fbdev->panel->cleanup(fbdev->panel);
1613 case 1:
1614 dev_set_drvdata(fbdev->dev, NULL);
1615 kfree(fbdev);
1616 case 0:
1617 /* nothing to free */
1618 break;
1619 default:
1620 BUG();
1621 }
1622 }
1623
1624 static int omapfb_find_ctrl(struct omapfb_device *fbdev)
1625 {
1626 struct omapfb_platform_data *conf;
1627 char name[17];
1628 int i;
1629
1630 conf = fbdev->dev->platform_data;
1631
1632 fbdev->ctrl = NULL;
1633
1634 strncpy(name, conf->lcd.ctrl_name, sizeof(name) - 1);
1635 name[sizeof(name) - 1] = '\0';
1636
1637 if (strcmp(name, "internal") == 0) {
1638 fbdev->ctrl = fbdev->int_ctrl;
1639 return 0;
1640 }
1641
1642 for (i = 0; i < ARRAY_SIZE(ctrls); i++) {
1643 dev_dbg(fbdev->dev, "ctrl %s\n", ctrls[i]->name);
1644 if (strcmp(ctrls[i]->name, name) == 0) {
1645 fbdev->ctrl = ctrls[i];
1646 break;
1647 }
1648 }
1649
1650 if (fbdev->ctrl == NULL) {
1651 dev_dbg(fbdev->dev, "ctrl %s not supported\n", name);
1652 return -1;
1653 }
1654
1655 return 0;
1656 }
1657
1658 static void check_required_callbacks(struct omapfb_device *fbdev)
1659 {
1660 #define _C(x) (fbdev->ctrl->x != NULL)
1661 #define _P(x) (fbdev->panel->x != NULL)
1662 BUG_ON(fbdev->ctrl == NULL || fbdev->panel == NULL);
1663 BUG_ON(!(_C(init) && _C(cleanup) && _C(get_caps) &&
1664 _C(set_update_mode) && _C(setup_plane) && _C(enable_plane) &&
1665 _P(init) && _P(cleanup) && _P(enable) && _P(disable) &&
1666 _P(get_caps)));
1667 #undef _P
1668 #undef _C
1669 }
1670
1671 /*
1672 * Called by LDM binding to probe and attach a new device.
1673 * Initialization sequence:
1674 * 1. allocate system omapfb_device structure
1675 * 2. select controller type according to platform configuration
1676 * init LCD panel
1677 * 3. init LCD controller and LCD DMA
1678 * 4. init system fb_info structure for all planes
1679 * 5. setup video mode for first plane and enable it
1680 * 6. enable LCD panel
1681 * 7. register sysfs attributes
1682 * OMAPFB_ACTIVE: register system fb_info structure for all planes
1683 */
1684 static int omapfb_do_probe(struct platform_device *pdev,
1685 struct lcd_panel *panel)
1686 {
1687 struct omapfb_device *fbdev = NULL;
1688 int init_state;
1689 unsigned long phz, hhz, vhz;
1690 unsigned long vram;
1691 int i;
1692 int r = 0;
1693
1694 init_state = 0;
1695
1696 if (pdev->num_resources != 0) {
1697 dev_err(&pdev->dev, "probed for an unknown device\n");
1698 r = -ENODEV;
1699 goto cleanup;
1700 }
1701
1702 if (pdev->dev.platform_data == NULL) {
1703 dev_err(&pdev->dev, "missing platform data\n");
1704 r = -ENOENT;
1705 goto cleanup;
1706 }
1707
1708 fbdev = kzalloc(sizeof(struct omapfb_device), GFP_KERNEL);
1709 if (fbdev == NULL) {
1710 dev_err(&pdev->dev,
1711 "unable to allocate memory for device info\n");
1712 r = -ENOMEM;
1713 goto cleanup;
1714 }
1715 init_state++;
1716
1717 fbdev->dev = &pdev->dev;
1718 fbdev->panel = panel;
1719 fbdev->dssdev = &omapdss_device;
1720 platform_set_drvdata(pdev, fbdev);
1721
1722 mutex_init(&fbdev->rqueue_mutex);
1723
1724 #ifdef CONFIG_ARCH_OMAP1
1725 fbdev->int_ctrl = &omap1_int_ctrl;
1726 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
1727 fbdev->ext_if = &omap1_ext_if;
1728 #endif
1729 #else /* OMAP2 */
1730 fbdev->int_ctrl = &omap2_int_ctrl;
1731 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
1732 fbdev->ext_if = &omap2_ext_if;
1733 #endif
1734 #endif
1735 if (omapfb_find_ctrl(fbdev) < 0) {
1736 dev_err(fbdev->dev,
1737 "LCD controller not found, board not supported\n");
1738 r = -ENODEV;
1739 goto cleanup;
1740 }
1741
1742 r = fbdev->panel->init(fbdev->panel, fbdev);
1743 if (r)
1744 goto cleanup;
1745
1746 pr_info("omapfb: configured for panel %s\n", fbdev->panel->name);
1747
1748 def_vxres = def_vxres ? def_vxres : fbdev->panel->x_res;
1749 def_vyres = def_vyres ? def_vyres : fbdev->panel->y_res;
1750
1751 init_state++;
1752
1753 r = ctrl_init(fbdev);
1754 if (r)
1755 goto cleanup;
1756 if (fbdev->ctrl->mmap != NULL)
1757 omapfb_ops.fb_mmap = omapfb_mmap;
1758 init_state++;
1759
1760 check_required_callbacks(fbdev);
1761
1762 r = planes_init(fbdev);
1763 if (r)
1764 goto cleanup;
1765 init_state++;
1766
1767 #ifdef CONFIG_FB_OMAP_DMA_TUNE
1768 /* Set DMA priority for EMIFF access to highest */
1769 if (cpu_class_is_omap1())
1770 omap_set_dma_priority(0, OMAP_DMA_PORT_EMIFF, 15);
1771 #endif
1772
1773 r = ctrl_change_mode(fbdev->fb_info[0]);
1774 if (r) {
1775 dev_err(fbdev->dev, "mode setting failed\n");
1776 goto cleanup;
1777 }
1778
1779 /* GFX plane is enabled by default */
1780 r = fbdev->ctrl->enable_plane(OMAPFB_PLANE_GFX, 1);
1781 if (r)
1782 goto cleanup;
1783
1784 omapfb_set_update_mode(fbdev, manual_update ?
1785 OMAPFB_MANUAL_UPDATE : OMAPFB_AUTO_UPDATE);
1786 init_state++;
1787
1788 r = fbdev->panel->enable(fbdev->panel);
1789 if (r)
1790 goto cleanup;
1791 init_state++;
1792
1793 r = omapfb_register_sysfs(fbdev);
1794 if (r)
1795 goto cleanup;
1796 init_state++;
1797
1798 vram = 0;
1799 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1800 r = register_framebuffer(fbdev->fb_info[i]);
1801 if (r != 0) {
1802 dev_err(fbdev->dev,
1803 "registering framebuffer %d failed\n", i);
1804 goto cleanup;
1805 }
1806 vram += fbdev->mem_desc.region[i].size;
1807 }
1808
1809 fbdev->state = OMAPFB_ACTIVE;
1810
1811 panel = fbdev->panel;
1812 phz = panel->pixel_clock * 1000;
1813 hhz = phz * 10 / (panel->hfp + panel->x_res + panel->hbp + panel->hsw);
1814 vhz = hhz / (panel->vfp + panel->y_res + panel->vbp + panel->vsw);
1815
1816 omapfb_dev = fbdev;
1817
1818 pr_info("omapfb: Framebuffer initialized. Total vram %lu planes %d\n",
1819 vram, fbdev->mem_desc.region_cnt);
1820 pr_info("omapfb: Pixclock %lu kHz hfreq %lu.%lu kHz "
1821 "vfreq %lu.%lu Hz\n",
1822 phz / 1000, hhz / 10000, hhz % 10, vhz / 10, vhz % 10);
1823
1824 return 0;
1825
1826 cleanup:
1827 omapfb_free_resources(fbdev, init_state);
1828
1829 return r;
1830 }
1831
1832 static int omapfb_probe(struct platform_device *pdev)
1833 {
1834 int r;
1835
1836 BUG_ON(fbdev_pdev != NULL);
1837
1838 r = platform_device_register(&omapdss_device);
1839 if (r) {
1840 dev_err(&pdev->dev, "can't register omapdss device\n");
1841 return r;
1842 }
1843
1844 /* Delay actual initialization until the LCD is registered */
1845 fbdev_pdev = pdev;
1846 if (fbdev_panel != NULL)
1847 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1848 return 0;
1849 }
1850
1851 void omapfb_register_panel(struct lcd_panel *panel)
1852 {
1853 BUG_ON(fbdev_panel != NULL);
1854
1855 fbdev_panel = panel;
1856 if (fbdev_pdev != NULL)
1857 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1858 }
1859
1860 /* Called when the device is being detached from the driver */
1861 static int omapfb_remove(struct platform_device *pdev)
1862 {
1863 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1864 enum omapfb_state saved_state = fbdev->state;
1865
1866 /* FIXME: wait till completion of pending events */
1867
1868 fbdev->state = OMAPFB_DISABLED;
1869 omapfb_free_resources(fbdev, saved_state);
1870
1871 platform_device_unregister(&omapdss_device);
1872 fbdev->dssdev = NULL;
1873
1874 return 0;
1875 }
1876
1877 /* PM suspend */
1878 static int omapfb_suspend(struct platform_device *pdev, pm_message_t mesg)
1879 {
1880 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1881
1882 if (fbdev != NULL)
1883 omapfb_blank(FB_BLANK_POWERDOWN, fbdev->fb_info[0]);
1884 return 0;
1885 }
1886
1887 /* PM resume */
1888 static int omapfb_resume(struct platform_device *pdev)
1889 {
1890 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1891
1892 if (fbdev != NULL)
1893 omapfb_blank(FB_BLANK_UNBLANK, fbdev->fb_info[0]);
1894 return 0;
1895 }
1896
1897 static struct platform_driver omapfb_driver = {
1898 .probe = omapfb_probe,
1899 .remove = omapfb_remove,
1900 .suspend = omapfb_suspend,
1901 .resume = omapfb_resume,
1902 .driver = {
1903 .name = MODULE_NAME,
1904 .owner = THIS_MODULE,
1905 },
1906 };
1907
1908 #ifndef MODULE
1909
1910 /* Process kernel command line parameters */
1911 static int __init omapfb_setup(char *options)
1912 {
1913 char *this_opt = NULL;
1914 int r = 0;
1915
1916 pr_debug("omapfb: options %s\n", options);
1917
1918 if (!options || !*options)
1919 return 0;
1920
1921 while (!r && (this_opt = strsep(&options, ",")) != NULL) {
1922 if (!strncmp(this_opt, "accel", 5))
1923 def_accel = 1;
1924 else if (!strncmp(this_opt, "vram:", 5)) {
1925 char *suffix;
1926 unsigned long vram;
1927 vram = (simple_strtoul(this_opt + 5, &suffix, 0));
1928 switch (suffix[0]) {
1929 case '\0':
1930 break;
1931 case 'm':
1932 case 'M':
1933 vram *= 1024;
1934 /* Fall through */
1935 case 'k':
1936 case 'K':
1937 vram *= 1024;
1938 break;
1939 default:
1940 pr_debug("omapfb: invalid vram suffix %c\n",
1941 suffix[0]);
1942 r = -1;
1943 }
1944 def_vram[def_vram_cnt++] = vram;
1945 }
1946 else if (!strncmp(this_opt, "vxres:", 6))
1947 def_vxres = simple_strtoul(this_opt + 6, NULL, 0);
1948 else if (!strncmp(this_opt, "vyres:", 6))
1949 def_vyres = simple_strtoul(this_opt + 6, NULL, 0);
1950 else if (!strncmp(this_opt, "rotate:", 7))
1951 def_rotate = (simple_strtoul(this_opt + 7, NULL, 0));
1952 else if (!strncmp(this_opt, "mirror:", 7))
1953 def_mirror = (simple_strtoul(this_opt + 7, NULL, 0));
1954 else if (!strncmp(this_opt, "manual_update", 13))
1955 manual_update = 1;
1956 else {
1957 pr_debug("omapfb: invalid option\n");
1958 r = -1;
1959 }
1960 }
1961
1962 return r;
1963 }
1964
1965 #endif
1966
1967 /* Register both the driver and the device */
1968 static int __init omapfb_init(void)
1969 {
1970 #ifndef MODULE
1971 char *option;
1972
1973 if (fb_get_options("omapfb", &option))
1974 return -ENODEV;
1975 omapfb_setup(option);
1976 #endif
1977 /* Register the driver with LDM */
1978 if (platform_driver_register(&omapfb_driver)) {
1979 pr_debug("failed to register omapfb driver\n");
1980 return -ENODEV;
1981 }
1982
1983 return 0;
1984 }
1985
1986 static void __exit omapfb_cleanup(void)
1987 {
1988 platform_driver_unregister(&omapfb_driver);
1989 }
1990
1991 module_param_named(accel, def_accel, uint, 0664);
1992 module_param_array_named(vram, def_vram, ulong, &def_vram_cnt, 0664);
1993 module_param_named(vxres, def_vxres, long, 0664);
1994 module_param_named(vyres, def_vyres, long, 0664);
1995 module_param_named(rotate, def_rotate, uint, 0664);
1996 module_param_named(mirror, def_mirror, uint, 0664);
1997 module_param_named(manual_update, manual_update, bool, 0664);
1998
1999 module_init(omapfb_init);
2000 module_exit(omapfb_cleanup);
2001
2002 MODULE_DESCRIPTION("TI OMAP framebuffer driver");
2003 MODULE_AUTHOR("Imre Deak <imre.deak@nokia.com>");
2004 MODULE_LICENSE("GPL");