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xfs: fix the comment of xlog_recover_buffer_pass2()
[linux-2.6/btrfs-unstable.git] / drivers / video / omap / omapfb_main.c
blobd40612c31a989d9437e482496ff52c6f451404d8
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 <linux/omap-dma.h>
34
35 #include <mach/hardware.h>
36
37 #include "omapfb.h"
38 #include "lcdc.h"
39
40 #define MODULE_NAME "omapfb"
41
42 static unsigned int def_accel;
43 static unsigned long def_vram[OMAPFB_PLANE_NUM];
44 static unsigned int def_vram_cnt;
45 static unsigned long def_vxres;
46 static unsigned long def_vyres;
47 static unsigned int def_rotate;
48 static unsigned int def_mirror;
49
50 #ifdef CONFIG_FB_OMAP_MANUAL_UPDATE
51 static bool manual_update = 1;
52 #else
53 static bool manual_update;
54 #endif
55
56 static struct platform_device *fbdev_pdev;
57 static struct lcd_panel *fbdev_panel;
58 static struct omapfb_device *omapfb_dev;
59
60 struct caps_table_struct {
61 unsigned long flag;
62 const char *name;
63 };
64
65 static struct caps_table_struct ctrl_caps[] = {
66 { OMAPFB_CAPS_MANUAL_UPDATE, "manual update" },
67 { OMAPFB_CAPS_TEARSYNC, "tearing synchronization" },
68 { OMAPFB_CAPS_PLANE_RELOCATE_MEM, "relocate plane memory" },
69 { OMAPFB_CAPS_PLANE_SCALE, "scale plane" },
70 { OMAPFB_CAPS_WINDOW_PIXEL_DOUBLE, "pixel double window" },
71 { OMAPFB_CAPS_WINDOW_SCALE, "scale window" },
72 { OMAPFB_CAPS_WINDOW_OVERLAY, "overlay window" },
73 { OMAPFB_CAPS_WINDOW_ROTATE, "rotate window" },
74 { OMAPFB_CAPS_SET_BACKLIGHT, "backlight setting" },
75 };
76
77 static struct caps_table_struct color_caps[] = {
78 { 1 << OMAPFB_COLOR_RGB565, "RGB565", },
79 { 1 << OMAPFB_COLOR_YUV422, "YUV422", },
80 { 1 << OMAPFB_COLOR_YUV420, "YUV420", },
81 { 1 << OMAPFB_COLOR_CLUT_8BPP, "CLUT8", },
82 { 1 << OMAPFB_COLOR_CLUT_4BPP, "CLUT4", },
83 { 1 << OMAPFB_COLOR_CLUT_2BPP, "CLUT2", },
84 { 1 << OMAPFB_COLOR_CLUT_1BPP, "CLUT1", },
85 { 1 << OMAPFB_COLOR_RGB444, "RGB444", },
86 { 1 << OMAPFB_COLOR_YUY422, "YUY422", },
87 };
88
89 static void omapdss_release(struct device *dev)
90 {
91 }
92
93 /* dummy device for clocks */
94 static struct platform_device omapdss_device = {
95 .name = "omapdss_dss",
96 .id = -1,
97 .dev = {
98 .release = omapdss_release,
99 },
100 };
101
102 /*
103 * ---------------------------------------------------------------------------
104 * LCD panel
105 * ---------------------------------------------------------------------------
106 */
107 extern struct lcd_ctrl hwa742_ctrl;
108
109 static const struct lcd_ctrl *ctrls[] = {
110 &omap1_int_ctrl,
111
112 #ifdef CONFIG_FB_OMAP_LCDC_HWA742
113 &hwa742_ctrl,
114 #endif
115 };
116
117 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
118 extern struct lcd_ctrl_extif omap1_ext_if;
119 #endif
120
121 static void omapfb_rqueue_lock(struct omapfb_device *fbdev)
122 {
123 mutex_lock(&fbdev->rqueue_mutex);
124 }
125
126 static void omapfb_rqueue_unlock(struct omapfb_device *fbdev)
127 {
128 mutex_unlock(&fbdev->rqueue_mutex);
129 }
130
131 /*
132 * ---------------------------------------------------------------------------
133 * LCD controller and LCD DMA
134 * ---------------------------------------------------------------------------
135 */
136 /*
137 * Allocate resources needed for LCD controller and LCD DMA operations. Video
138 * memory is allocated from system memory according to the virtual display
139 * size, except if a bigger memory size is specified explicitly as a kernel
140 * parameter.
141 */
142 static int ctrl_init(struct omapfb_device *fbdev)
143 {
144 int r;
145 int i;
146
147 /* kernel/module vram parameters override boot tags/board config */
148 if (def_vram_cnt) {
149 for (i = 0; i < def_vram_cnt; i++)
150 fbdev->mem_desc.region[i].size =
151 PAGE_ALIGN(def_vram[i]);
152 fbdev->mem_desc.region_cnt = i;
153 }
154
155 if (!fbdev->mem_desc.region_cnt) {
156 struct lcd_panel *panel = fbdev->panel;
157 int def_size;
158 int bpp = panel->bpp;
159
160 /* 12 bpp is packed in 16 bits */
161 if (bpp == 12)
162 bpp = 16;
163 def_size = def_vxres * def_vyres * bpp / 8;
164 fbdev->mem_desc.region_cnt = 1;
165 fbdev->mem_desc.region[0].size = PAGE_ALIGN(def_size);
166 }
167 r = fbdev->ctrl->init(fbdev, 0, &fbdev->mem_desc);
168 if (r < 0) {
169 dev_err(fbdev->dev, "controller initialization failed (%d)\n",
170 r);
171 return r;
172 }
173
174 #ifdef DEBUG
175 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
176 dev_dbg(fbdev->dev, "region%d phys %08x virt %p size=%lu\n",
177 i,
178 fbdev->mem_desc.region[i].paddr,
179 fbdev->mem_desc.region[i].vaddr,
180 fbdev->mem_desc.region[i].size);
181 }
182 #endif
183 return 0;
184 }
185
186 static void ctrl_cleanup(struct omapfb_device *fbdev)
187 {
188 fbdev->ctrl->cleanup();
189 }
190
191 /* Must be called with fbdev->rqueue_mutex held. */
192 static int ctrl_change_mode(struct fb_info *fbi)
193 {
194 int r;
195 unsigned long offset;
196 struct omapfb_plane_struct *plane = fbi->par;
197 struct omapfb_device *fbdev = plane->fbdev;
198 struct fb_var_screeninfo *var = &fbi->var;
199
200 offset = var->yoffset * fbi->fix.line_length +
201 var->xoffset * var->bits_per_pixel / 8;
202
203 if (fbdev->ctrl->sync)
204 fbdev->ctrl->sync();
205 r = fbdev->ctrl->setup_plane(plane->idx, plane->info.channel_out,
206 offset, var->xres_virtual,
207 plane->info.pos_x, plane->info.pos_y,
208 var->xres, var->yres, plane->color_mode);
209 if (r < 0)
210 return r;
211
212 if (fbdev->ctrl->set_rotate != NULL) {
213 r = fbdev->ctrl->set_rotate(var->rotate);
214 if (r < 0)
215 return r;
216 }
217
218 if (fbdev->ctrl->set_scale != NULL)
219 r = fbdev->ctrl->set_scale(plane->idx,
220 var->xres, var->yres,
221 plane->info.out_width,
222 plane->info.out_height);
223
224 return r;
225 }
226
227 /*
228 * ---------------------------------------------------------------------------
229 * fbdev framework callbacks and the ioctl interface
230 * ---------------------------------------------------------------------------
231 */
232 /* Called each time the omapfb device is opened */
233 static int omapfb_open(struct fb_info *info, int user)
234 {
235 return 0;
236 }
237
238 static void omapfb_sync(struct fb_info *info);
239
240 /* Called when the omapfb device is closed. We make sure that any pending
241 * gfx DMA operations are ended, before we return. */
242 static int omapfb_release(struct fb_info *info, int user)
243 {
244 omapfb_sync(info);
245 return 0;
246 }
247
248 /* Store a single color palette entry into a pseudo palette or the hardware
249 * palette if one is available. For now we support only 16bpp and thus store
250 * the entry only to the pseudo palette.
251 */
252 static int _setcolreg(struct fb_info *info, u_int regno, u_int red, u_int green,
253 u_int blue, u_int transp, int update_hw_pal)
254 {
255 struct omapfb_plane_struct *plane = info->par;
256 struct omapfb_device *fbdev = plane->fbdev;
257 struct fb_var_screeninfo *var = &info->var;
258 int r = 0;
259
260 switch (plane->color_mode) {
261 case OMAPFB_COLOR_YUV422:
262 case OMAPFB_COLOR_YUV420:
263 case OMAPFB_COLOR_YUY422:
264 r = -EINVAL;
265 break;
266 case OMAPFB_COLOR_CLUT_8BPP:
267 case OMAPFB_COLOR_CLUT_4BPP:
268 case OMAPFB_COLOR_CLUT_2BPP:
269 case OMAPFB_COLOR_CLUT_1BPP:
270 if (fbdev->ctrl->setcolreg)
271 r = fbdev->ctrl->setcolreg(regno, red, green, blue,
272 transp, update_hw_pal);
273 /* Fallthrough */
274 case OMAPFB_COLOR_RGB565:
275 case OMAPFB_COLOR_RGB444:
276 if (r != 0)
277 break;
278
279 if (regno < 0) {
280 r = -EINVAL;
281 break;
282 }
283
284 if (regno < 16) {
285 u16 pal;
286 pal = ((red >> (16 - var->red.length)) <<
287 var->red.offset) |
288 ((green >> (16 - var->green.length)) <<
289 var->green.offset) |
290 (blue >> (16 - var->blue.length));
291 ((u32 *)(info->pseudo_palette))[regno] = pal;
292 }
293 break;
294 default:
295 BUG();
296 }
297 return r;
298 }
299
300 static int omapfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
301 u_int transp, struct fb_info *info)
302 {
303 return _setcolreg(info, regno, red, green, blue, transp, 1);
304 }
305
306 static int omapfb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
307 {
308 int count, index, r;
309 u16 *red, *green, *blue, *transp;
310 u16 trans = 0xffff;
311
312 red = cmap->red;
313 green = cmap->green;
314 blue = cmap->blue;
315 transp = cmap->transp;
316 index = cmap->start;
317
318 for (count = 0; count < cmap->len; count++) {
319 if (transp)
320 trans = *transp++;
321 r = _setcolreg(info, index++, *red++, *green++, *blue++, trans,
322 count == cmap->len - 1);
323 if (r != 0)
324 return r;
325 }
326
327 return 0;
328 }
329
330 static int omapfb_update_full_screen(struct fb_info *fbi);
331
332 static int omapfb_blank(int blank, struct fb_info *fbi)
333 {
334 struct omapfb_plane_struct *plane = fbi->par;
335 struct omapfb_device *fbdev = plane->fbdev;
336 int do_update = 0;
337 int r = 0;
338
339 omapfb_rqueue_lock(fbdev);
340 switch (blank) {
341 case FB_BLANK_UNBLANK:
342 if (fbdev->state == OMAPFB_SUSPENDED) {
343 if (fbdev->ctrl->resume)
344 fbdev->ctrl->resume();
345 fbdev->panel->enable(fbdev->panel);
346 fbdev->state = OMAPFB_ACTIVE;
347 if (fbdev->ctrl->get_update_mode() ==
348 OMAPFB_MANUAL_UPDATE)
349 do_update = 1;
350 }
351 break;
352 case FB_BLANK_POWERDOWN:
353 if (fbdev->state == OMAPFB_ACTIVE) {
354 fbdev->panel->disable(fbdev->panel);
355 if (fbdev->ctrl->suspend)
356 fbdev->ctrl->suspend();
357 fbdev->state = OMAPFB_SUSPENDED;
358 }
359 break;
360 default:
361 r = -EINVAL;
362 }
363 omapfb_rqueue_unlock(fbdev);
364
365 if (r == 0 && do_update)
366 r = omapfb_update_full_screen(fbi);
367
368 return r;
369 }
370
371 static void omapfb_sync(struct fb_info *fbi)
372 {
373 struct omapfb_plane_struct *plane = fbi->par;
374 struct omapfb_device *fbdev = plane->fbdev;
375
376 omapfb_rqueue_lock(fbdev);
377 if (fbdev->ctrl->sync)
378 fbdev->ctrl->sync();
379 omapfb_rqueue_unlock(fbdev);
380 }
381
382 /*
383 * Set fb_info.fix fields and also updates fbdev.
384 * When calling this fb_info.var must be set up already.
385 */
386 static void set_fb_fix(struct fb_info *fbi, int from_init)
387 {
388 struct fb_fix_screeninfo *fix = &fbi->fix;
389 struct fb_var_screeninfo *var = &fbi->var;
390 struct omapfb_plane_struct *plane = fbi->par;
391 struct omapfb_mem_region *rg;
392 int bpp;
393
394 rg = &plane->fbdev->mem_desc.region[plane->idx];
395 fbi->screen_base = rg->vaddr;
396
397 if (!from_init) {
398 mutex_lock(&fbi->mm_lock);
399 fix->smem_start = rg->paddr;
400 fix->smem_len = rg->size;
401 mutex_unlock(&fbi->mm_lock);
402 } else {
403 fix->smem_start = rg->paddr;
404 fix->smem_len = rg->size;
405 }
406
407 fix->type = FB_TYPE_PACKED_PIXELS;
408 bpp = var->bits_per_pixel;
409 if (var->nonstd)
410 fix->visual = FB_VISUAL_PSEUDOCOLOR;
411 else switch (var->bits_per_pixel) {
412 case 16:
413 case 12:
414 fix->visual = FB_VISUAL_TRUECOLOR;
415 /* 12bpp is stored in 16 bits */
416 bpp = 16;
417 break;
418 case 1:
419 case 2:
420 case 4:
421 case 8:
422 fix->visual = FB_VISUAL_PSEUDOCOLOR;
423 break;
424 }
425 fix->accel = FB_ACCEL_OMAP1610;
426 fix->line_length = var->xres_virtual * bpp / 8;
427 }
428
429 static int set_color_mode(struct omapfb_plane_struct *plane,
430 struct fb_var_screeninfo *var)
431 {
432 switch (var->nonstd) {
433 case 0:
434 break;
435 case OMAPFB_COLOR_YUV422:
436 var->bits_per_pixel = 16;
437 plane->color_mode = var->nonstd;
438 return 0;
439 case OMAPFB_COLOR_YUV420:
440 var->bits_per_pixel = 12;
441 plane->color_mode = var->nonstd;
442 return 0;
443 case OMAPFB_COLOR_YUY422:
444 var->bits_per_pixel = 16;
445 plane->color_mode = var->nonstd;
446 return 0;
447 default:
448 return -EINVAL;
449 }
450
451 switch (var->bits_per_pixel) {
452 case 1:
453 plane->color_mode = OMAPFB_COLOR_CLUT_1BPP;
454 return 0;
455 case 2:
456 plane->color_mode = OMAPFB_COLOR_CLUT_2BPP;
457 return 0;
458 case 4:
459 plane->color_mode = OMAPFB_COLOR_CLUT_4BPP;
460 return 0;
461 case 8:
462 plane->color_mode = OMAPFB_COLOR_CLUT_8BPP;
463 return 0;
464 case 12:
465 var->bits_per_pixel = 16;
466 case 16:
467 if (plane->fbdev->panel->bpp == 12)
468 plane->color_mode = OMAPFB_COLOR_RGB444;
469 else
470 plane->color_mode = OMAPFB_COLOR_RGB565;
471 return 0;
472 default:
473 return -EINVAL;
474 }
475 }
476
477 /*
478 * Check the values in var against our capabilities and in case of out of
479 * bound values try to adjust them.
480 */
481 static int set_fb_var(struct fb_info *fbi,
482 struct fb_var_screeninfo *var)
483 {
484 int bpp;
485 unsigned long max_frame_size;
486 unsigned long line_size;
487 int xres_min, xres_max;
488 int yres_min, yres_max;
489 struct omapfb_plane_struct *plane = fbi->par;
490 struct omapfb_device *fbdev = plane->fbdev;
491 struct lcd_panel *panel = fbdev->panel;
492
493 if (set_color_mode(plane, var) < 0)
494 return -EINVAL;
495
496 bpp = var->bits_per_pixel;
497 if (plane->color_mode == OMAPFB_COLOR_RGB444)
498 bpp = 16;
499
500 switch (var->rotate) {
501 case 0:
502 case 180:
503 xres_min = OMAPFB_PLANE_XRES_MIN;
504 xres_max = panel->x_res;
505 yres_min = OMAPFB_PLANE_YRES_MIN;
506 yres_max = panel->y_res;
507 if (cpu_is_omap15xx()) {
508 var->xres = panel->x_res;
509 var->yres = panel->y_res;
510 }
511 break;
512 case 90:
513 case 270:
514 xres_min = OMAPFB_PLANE_YRES_MIN;
515 xres_max = panel->y_res;
516 yres_min = OMAPFB_PLANE_XRES_MIN;
517 yres_max = panel->x_res;
518 if (cpu_is_omap15xx()) {
519 var->xres = panel->y_res;
520 var->yres = panel->x_res;
521 }
522 break;
523 default:
524 return -EINVAL;
525 }
526
527 if (var->xres < xres_min)
528 var->xres = xres_min;
529 if (var->yres < yres_min)
530 var->yres = yres_min;
531 if (var->xres > xres_max)
532 var->xres = xres_max;
533 if (var->yres > yres_max)
534 var->yres = yres_max;
535
536 if (var->xres_virtual < var->xres)
537 var->xres_virtual = var->xres;
538 if (var->yres_virtual < var->yres)
539 var->yres_virtual = var->yres;
540 max_frame_size = fbdev->mem_desc.region[plane->idx].size;
541 line_size = var->xres_virtual * bpp / 8;
542 if (line_size * var->yres_virtual > max_frame_size) {
543 /* Try to keep yres_virtual first */
544 line_size = max_frame_size / var->yres_virtual;
545 var->xres_virtual = line_size * 8 / bpp;
546 if (var->xres_virtual < var->xres) {
547 /* Still doesn't fit. Shrink yres_virtual too */
548 var->xres_virtual = var->xres;
549 line_size = var->xres * bpp / 8;
550 var->yres_virtual = max_frame_size / line_size;
551 }
552 /* Recheck this, as the virtual size changed. */
553 if (var->xres_virtual < var->xres)
554 var->xres = var->xres_virtual;
555 if (var->yres_virtual < var->yres)
556 var->yres = var->yres_virtual;
557 if (var->xres < xres_min || var->yres < yres_min)
558 return -EINVAL;
559 }
560 if (var->xres + var->xoffset > var->xres_virtual)
561 var->xoffset = var->xres_virtual - var->xres;
562 if (var->yres + var->yoffset > var->yres_virtual)
563 var->yoffset = var->yres_virtual - var->yres;
564
565 if (plane->color_mode == OMAPFB_COLOR_RGB444) {
566 var->red.offset = 8; var->red.length = 4;
567 var->red.msb_right = 0;
568 var->green.offset = 4; var->green.length = 4;
569 var->green.msb_right = 0;
570 var->blue.offset = 0; var->blue.length = 4;
571 var->blue.msb_right = 0;
572 } else {
573 var->red.offset = 11; var->red.length = 5;
574 var->red.msb_right = 0;
575 var->green.offset = 5; var->green.length = 6;
576 var->green.msb_right = 0;
577 var->blue.offset = 0; var->blue.length = 5;
578 var->blue.msb_right = 0;
579 }
580
581 var->height = -1;
582 var->width = -1;
583 var->grayscale = 0;
584
585 /* pixclock in ps, the rest in pixclock */
586 var->pixclock = 10000000 / (panel->pixel_clock / 100);
587 var->left_margin = panel->hfp;
588 var->right_margin = panel->hbp;
589 var->upper_margin = panel->vfp;
590 var->lower_margin = panel->vbp;
591 var->hsync_len = panel->hsw;
592 var->vsync_len = panel->vsw;
593
594 /* TODO: get these from panel->config */
595 var->vmode = FB_VMODE_NONINTERLACED;
596 var->sync = 0;
597
598 return 0;
599 }
600
601
602 /* Set rotation (0, 90, 180, 270 degree), and switch to the new mode. */
603 static void omapfb_rotate(struct fb_info *fbi, int rotate)
604 {
605 struct omapfb_plane_struct *plane = fbi->par;
606 struct omapfb_device *fbdev = plane->fbdev;
607
608 omapfb_rqueue_lock(fbdev);
609 if (rotate != fbi->var.rotate) {
610 struct fb_var_screeninfo *new_var = &fbdev->new_var;
611
612 memcpy(new_var, &fbi->var, sizeof(*new_var));
613 new_var->rotate = rotate;
614 if (set_fb_var(fbi, new_var) == 0 &&
615 memcmp(new_var, &fbi->var, sizeof(*new_var))) {
616 memcpy(&fbi->var, new_var, sizeof(*new_var));
617 ctrl_change_mode(fbi);
618 }
619 }
620 omapfb_rqueue_unlock(fbdev);
621 }
622
623 /*
624 * Set new x,y offsets in the virtual display for the visible area and switch
625 * to the new mode.
626 */
627 static int omapfb_pan_display(struct fb_var_screeninfo *var,
628 struct fb_info *fbi)
629 {
630 struct omapfb_plane_struct *plane = fbi->par;
631 struct omapfb_device *fbdev = plane->fbdev;
632 int r = 0;
633
634 omapfb_rqueue_lock(fbdev);
635 if (var->xoffset != fbi->var.xoffset ||
636 var->yoffset != fbi->var.yoffset) {
637 struct fb_var_screeninfo *new_var = &fbdev->new_var;
638
639 memcpy(new_var, &fbi->var, sizeof(*new_var));
640 new_var->xoffset = var->xoffset;
641 new_var->yoffset = var->yoffset;
642 if (set_fb_var(fbi, new_var))
643 r = -EINVAL;
644 else {
645 memcpy(&fbi->var, new_var, sizeof(*new_var));
646 ctrl_change_mode(fbi);
647 }
648 }
649 omapfb_rqueue_unlock(fbdev);
650
651 return r;
652 }
653
654 /* Set mirror to vertical axis and switch to the new mode. */
655 static int omapfb_mirror(struct fb_info *fbi, int mirror)
656 {
657 struct omapfb_plane_struct *plane = fbi->par;
658 struct omapfb_device *fbdev = plane->fbdev;
659 int r = 0;
660
661 omapfb_rqueue_lock(fbdev);
662 mirror = mirror ? 1 : 0;
663 if (cpu_is_omap15xx())
664 r = -EINVAL;
665 else if (mirror != plane->info.mirror) {
666 plane->info.mirror = mirror;
667 r = ctrl_change_mode(fbi);
668 }
669 omapfb_rqueue_unlock(fbdev);
670
671 return r;
672 }
673
674 /*
675 * Check values in var, try to adjust them in case of out of bound values if
676 * possible, or return error.
677 */
678 static int omapfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
679 {
680 struct omapfb_plane_struct *plane = fbi->par;
681 struct omapfb_device *fbdev = plane->fbdev;
682 int r;
683
684 omapfb_rqueue_lock(fbdev);
685 if (fbdev->ctrl->sync != NULL)
686 fbdev->ctrl->sync();
687 r = set_fb_var(fbi, var);
688 omapfb_rqueue_unlock(fbdev);
689
690 return r;
691 }
692
693 /*
694 * Switch to a new mode. The parameters for it has been check already by
695 * omapfb_check_var.
696 */
697 static int omapfb_set_par(struct fb_info *fbi)
698 {
699 struct omapfb_plane_struct *plane = fbi->par;
700 struct omapfb_device *fbdev = plane->fbdev;
701 int r = 0;
702
703 omapfb_rqueue_lock(fbdev);
704 set_fb_fix(fbi, 0);
705 r = ctrl_change_mode(fbi);
706 omapfb_rqueue_unlock(fbdev);
707
708 return r;
709 }
710
711 int omapfb_update_window_async(struct fb_info *fbi,
712 struct omapfb_update_window *win,
713 void (*callback)(void *),
714 void *callback_data)
715 {
716 int xres, yres;
717 struct omapfb_plane_struct *plane = fbi->par;
718 struct omapfb_device *fbdev = plane->fbdev;
719 struct fb_var_screeninfo *var = &fbi->var;
720
721 switch (var->rotate) {
722 case 0:
723 case 180:
724 xres = fbdev->panel->x_res;
725 yres = fbdev->panel->y_res;
726 break;
727 case 90:
728 case 270:
729 xres = fbdev->panel->y_res;
730 yres = fbdev->panel->x_res;
731 break;
732 default:
733 return -EINVAL;
734 }
735
736 if (win->x >= xres || win->y >= yres ||
737 win->out_x > xres || win->out_y > yres)
738 return -EINVAL;
739
740 if (!fbdev->ctrl->update_window ||
741 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
742 return -ENODEV;
743
744 if (win->x + win->width > xres)
745 win->width = xres - win->x;
746 if (win->y + win->height > yres)
747 win->height = yres - win->y;
748 if (win->out_x + win->out_width > xres)
749 win->out_width = xres - win->out_x;
750 if (win->out_y + win->out_height > yres)
751 win->out_height = yres - win->out_y;
752 if (!win->width || !win->height || !win->out_width || !win->out_height)
753 return 0;
754
755 return fbdev->ctrl->update_window(fbi, win, callback, callback_data);
756 }
757 EXPORT_SYMBOL(omapfb_update_window_async);
758
759 static int omapfb_update_win(struct fb_info *fbi,
760 struct omapfb_update_window *win)
761 {
762 struct omapfb_plane_struct *plane = fbi->par;
763 int ret;
764
765 omapfb_rqueue_lock(plane->fbdev);
766 ret = omapfb_update_window_async(fbi, win, NULL, NULL);
767 omapfb_rqueue_unlock(plane->fbdev);
768
769 return ret;
770 }
771
772 static int omapfb_update_full_screen(struct fb_info *fbi)
773 {
774 struct omapfb_plane_struct *plane = fbi->par;
775 struct omapfb_device *fbdev = plane->fbdev;
776 struct omapfb_update_window win;
777 int r;
778
779 if (!fbdev->ctrl->update_window ||
780 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
781 return -ENODEV;
782
783 win.x = 0;
784 win.y = 0;
785 win.width = fbi->var.xres;
786 win.height = fbi->var.yres;
787 win.out_x = 0;
788 win.out_y = 0;
789 win.out_width = fbi->var.xres;
790 win.out_height = fbi->var.yres;
791 win.format = 0;
792
793 omapfb_rqueue_lock(fbdev);
794 r = fbdev->ctrl->update_window(fbi, &win, NULL, NULL);
795 omapfb_rqueue_unlock(fbdev);
796
797 return r;
798 }
799
800 static int omapfb_setup_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
801 {
802 struct omapfb_plane_struct *plane = fbi->par;
803 struct omapfb_device *fbdev = plane->fbdev;
804 struct lcd_panel *panel = fbdev->panel;
805 struct omapfb_plane_info old_info;
806 int r = 0;
807
808 if (pi->pos_x + pi->out_width > panel->x_res ||
809 pi->pos_y + pi->out_height > panel->y_res)
810 return -EINVAL;
811
812 omapfb_rqueue_lock(fbdev);
813 if (pi->enabled && !fbdev->mem_desc.region[plane->idx].size) {
814 /*
815 * This plane's memory was freed, can't enable it
816 * until it's reallocated.
817 */
818 r = -EINVAL;
819 goto out;
820 }
821 old_info = plane->info;
822 plane->info = *pi;
823 if (pi->enabled) {
824 r = ctrl_change_mode(fbi);
825 if (r < 0) {
826 plane->info = old_info;
827 goto out;
828 }
829 }
830 r = fbdev->ctrl->enable_plane(plane->idx, pi->enabled);
831 if (r < 0) {
832 plane->info = old_info;
833 goto out;
834 }
835 out:
836 omapfb_rqueue_unlock(fbdev);
837 return r;
838 }
839
840 static int omapfb_query_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
841 {
842 struct omapfb_plane_struct *plane = fbi->par;
843
844 *pi = plane->info;
845 return 0;
846 }
847
848 static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
849 {
850 struct omapfb_plane_struct *plane = fbi->par;
851 struct omapfb_device *fbdev = plane->fbdev;
852 struct omapfb_mem_region *rg = &fbdev->mem_desc.region[plane->idx];
853 size_t size;
854 int r = 0;
855
856 if (fbdev->ctrl->setup_mem == NULL)
857 return -ENODEV;
858 if (mi->type != OMAPFB_MEMTYPE_SDRAM)
859 return -EINVAL;
860
861 size = PAGE_ALIGN(mi->size);
862 omapfb_rqueue_lock(fbdev);
863 if (plane->info.enabled) {
864 r = -EBUSY;
865 goto out;
866 }
867 if (rg->size != size || rg->type != mi->type) {
868 struct fb_var_screeninfo *new_var = &fbdev->new_var;
869 unsigned long old_size = rg->size;
870 u8 old_type = rg->type;
871 unsigned long paddr;
872
873 rg->size = size;
874 rg->type = mi->type;
875 /*
876 * size == 0 is a special case, for which we
877 * don't check / adjust the screen parameters.
878 * This isn't a problem since the plane can't
879 * be reenabled unless its size is > 0.
880 */
881 if (old_size != size && size) {
882 if (size) {
883 memcpy(new_var, &fbi->var, sizeof(*new_var));
884 r = set_fb_var(fbi, new_var);
885 if (r < 0)
886 goto out;
887 }
888 }
889
890 if (fbdev->ctrl->sync)
891 fbdev->ctrl->sync();
892 r = fbdev->ctrl->setup_mem(plane->idx, size, mi->type, &paddr);
893 if (r < 0) {
894 /* Revert changes. */
895 rg->size = old_size;
896 rg->type = old_type;
897 goto out;
898 }
899 rg->paddr = paddr;
900
901 if (old_size != size) {
902 if (size) {
903 memcpy(&fbi->var, new_var, sizeof(fbi->var));
904 set_fb_fix(fbi, 0);
905 } else {
906 /*
907 * Set these explicitly to indicate that the
908 * plane memory is dealloce'd, the other
909 * screen parameters in var / fix are invalid.
910 */
911 mutex_lock(&fbi->mm_lock);
912 fbi->fix.smem_start = 0;
913 fbi->fix.smem_len = 0;
914 mutex_unlock(&fbi->mm_lock);
915 }
916 }
917 }
918 out:
919 omapfb_rqueue_unlock(fbdev);
920
921 return r;
922 }
923
924 static int omapfb_query_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
925 {
926 struct omapfb_plane_struct *plane = fbi->par;
927 struct omapfb_device *fbdev = plane->fbdev;
928 struct omapfb_mem_region *rg;
929
930 rg = &fbdev->mem_desc.region[plane->idx];
931 memset(mi, 0, sizeof(*mi));
932 mi->size = rg->size;
933 mi->type = rg->type;
934
935 return 0;
936 }
937
938 static int omapfb_set_color_key(struct omapfb_device *fbdev,
939 struct omapfb_color_key *ck)
940 {
941 int r;
942
943 if (!fbdev->ctrl->set_color_key)
944 return -ENODEV;
945
946 omapfb_rqueue_lock(fbdev);
947 r = fbdev->ctrl->set_color_key(ck);
948 omapfb_rqueue_unlock(fbdev);
949
950 return r;
951 }
952
953 static int omapfb_get_color_key(struct omapfb_device *fbdev,
954 struct omapfb_color_key *ck)
955 {
956 int r;
957
958 if (!fbdev->ctrl->get_color_key)
959 return -ENODEV;
960
961 omapfb_rqueue_lock(fbdev);
962 r = fbdev->ctrl->get_color_key(ck);
963 omapfb_rqueue_unlock(fbdev);
964
965 return r;
966 }
967
968 static struct blocking_notifier_head omapfb_client_list[OMAPFB_PLANE_NUM];
969 static int notifier_inited;
970
971 static void omapfb_init_notifier(void)
972 {
973 int i;
974
975 for (i = 0; i < OMAPFB_PLANE_NUM; i++)
976 BLOCKING_INIT_NOTIFIER_HEAD(&omapfb_client_list[i]);
977 }
978
979 int omapfb_register_client(struct omapfb_notifier_block *omapfb_nb,
980 omapfb_notifier_callback_t callback,
981 void *callback_data)
982 {
983 int r;
984
985 if ((unsigned)omapfb_nb->plane_idx > OMAPFB_PLANE_NUM)
986 return -EINVAL;
987
988 if (!notifier_inited) {
989 omapfb_init_notifier();
990 notifier_inited = 1;
991 }
992
993 omapfb_nb->nb.notifier_call = (int (*)(struct notifier_block *,
994 unsigned long, void *))callback;
995 omapfb_nb->data = callback_data;
996 r = blocking_notifier_chain_register(
997 &omapfb_client_list[omapfb_nb->plane_idx],
998 &omapfb_nb->nb);
999 if (r)
1000 return r;
1001 if (omapfb_dev != NULL &&
1002 omapfb_dev->ctrl && omapfb_dev->ctrl->bind_client) {
1003 omapfb_dev->ctrl->bind_client(omapfb_nb);
1004 }
1005
1006 return 0;
1007 }
1008 EXPORT_SYMBOL(omapfb_register_client);
1009
1010 int omapfb_unregister_client(struct omapfb_notifier_block *omapfb_nb)
1011 {
1012 return blocking_notifier_chain_unregister(
1013 &omapfb_client_list[omapfb_nb->plane_idx], &omapfb_nb->nb);
1014 }
1015 EXPORT_SYMBOL(omapfb_unregister_client);
1016
1017 void omapfb_notify_clients(struct omapfb_device *fbdev, unsigned long event)
1018 {
1019 int i;
1020
1021 if (!notifier_inited)
1022 /* no client registered yet */
1023 return;
1024
1025 for (i = 0; i < OMAPFB_PLANE_NUM; i++)
1026 blocking_notifier_call_chain(&omapfb_client_list[i], event,
1027 fbdev->fb_info[i]);
1028 }
1029 EXPORT_SYMBOL(omapfb_notify_clients);
1030
1031 static int omapfb_set_update_mode(struct omapfb_device *fbdev,
1032 enum omapfb_update_mode mode)
1033 {
1034 int r;
1035
1036 omapfb_rqueue_lock(fbdev);
1037 r = fbdev->ctrl->set_update_mode(mode);
1038 omapfb_rqueue_unlock(fbdev);
1039
1040 return r;
1041 }
1042
1043 static enum omapfb_update_mode omapfb_get_update_mode(struct omapfb_device *fbdev)
1044 {
1045 int r;
1046
1047 omapfb_rqueue_lock(fbdev);
1048 r = fbdev->ctrl->get_update_mode();
1049 omapfb_rqueue_unlock(fbdev);
1050
1051 return r;
1052 }
1053
1054 static void omapfb_get_caps(struct omapfb_device *fbdev, int plane,
1055 struct omapfb_caps *caps)
1056 {
1057 memset(caps, 0, sizeof(*caps));
1058 fbdev->ctrl->get_caps(plane, caps);
1059 caps->ctrl |= fbdev->panel->get_caps(fbdev->panel);
1060 }
1061
1062 /* For lcd testing */
1063 void omapfb_write_first_pixel(struct omapfb_device *fbdev, u16 pixval)
1064 {
1065 omapfb_rqueue_lock(fbdev);
1066 *(u16 *)fbdev->mem_desc.region[0].vaddr = pixval;
1067 if (fbdev->ctrl->get_update_mode() == OMAPFB_MANUAL_UPDATE) {
1068 struct omapfb_update_window win;
1069
1070 memset(&win, 0, sizeof(win));
1071 win.width = 2;
1072 win.height = 2;
1073 win.out_width = 2;
1074 win.out_height = 2;
1075 fbdev->ctrl->update_window(fbdev->fb_info[0], &win, NULL, NULL);
1076 }
1077 omapfb_rqueue_unlock(fbdev);
1078 }
1079 EXPORT_SYMBOL(omapfb_write_first_pixel);
1080
1081 /*
1082 * Ioctl interface. Part of the kernel mode frame buffer API is duplicated
1083 * here to be accessible by user mode code.
1084 */
1085 static int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd,
1086 unsigned long arg)
1087 {
1088 struct omapfb_plane_struct *plane = fbi->par;
1089 struct omapfb_device *fbdev = plane->fbdev;
1090 struct fb_ops *ops = fbi->fbops;
1091 union {
1092 struct omapfb_update_window update_window;
1093 struct omapfb_plane_info plane_info;
1094 struct omapfb_mem_info mem_info;
1095 struct omapfb_color_key color_key;
1096 enum omapfb_update_mode update_mode;
1097 struct omapfb_caps caps;
1098 unsigned int mirror;
1099 int plane_out;
1100 int enable_plane;
1101 } p;
1102 int r = 0;
1103
1104 BUG_ON(!ops);
1105 switch (cmd) {
1106 case OMAPFB_MIRROR:
1107 if (get_user(p.mirror, (int __user *)arg))
1108 r = -EFAULT;
1109 else
1110 omapfb_mirror(fbi, p.mirror);
1111 break;
1112 case OMAPFB_SYNC_GFX:
1113 omapfb_sync(fbi);
1114 break;
1115 case OMAPFB_VSYNC:
1116 break;
1117 case OMAPFB_SET_UPDATE_MODE:
1118 if (get_user(p.update_mode, (int __user *)arg))
1119 r = -EFAULT;
1120 else
1121 r = omapfb_set_update_mode(fbdev, p.update_mode);
1122 break;
1123 case OMAPFB_GET_UPDATE_MODE:
1124 p.update_mode = omapfb_get_update_mode(fbdev);
1125 if (put_user(p.update_mode,
1126 (enum omapfb_update_mode __user *)arg))
1127 r = -EFAULT;
1128 break;
1129 case OMAPFB_UPDATE_WINDOW_OLD:
1130 if (copy_from_user(&p.update_window, (void __user *)arg,
1131 sizeof(struct omapfb_update_window_old)))
1132 r = -EFAULT;
1133 else {
1134 struct omapfb_update_window *u = &p.update_window;
1135 u->out_x = u->x;
1136 u->out_y = u->y;
1137 u->out_width = u->width;
1138 u->out_height = u->height;
1139 memset(u->reserved, 0, sizeof(u->reserved));
1140 r = omapfb_update_win(fbi, u);
1141 }
1142 break;
1143 case OMAPFB_UPDATE_WINDOW:
1144 if (copy_from_user(&p.update_window, (void __user *)arg,
1145 sizeof(p.update_window)))
1146 r = -EFAULT;
1147 else
1148 r = omapfb_update_win(fbi, &p.update_window);
1149 break;
1150 case OMAPFB_SETUP_PLANE:
1151 if (copy_from_user(&p.plane_info, (void __user *)arg,
1152 sizeof(p.plane_info)))
1153 r = -EFAULT;
1154 else
1155 r = omapfb_setup_plane(fbi, &p.plane_info);
1156 break;
1157 case OMAPFB_QUERY_PLANE:
1158 if ((r = omapfb_query_plane(fbi, &p.plane_info)) < 0)
1159 break;
1160 if (copy_to_user((void __user *)arg, &p.plane_info,
1161 sizeof(p.plane_info)))
1162 r = -EFAULT;
1163 break;
1164 case OMAPFB_SETUP_MEM:
1165 if (copy_from_user(&p.mem_info, (void __user *)arg,
1166 sizeof(p.mem_info)))
1167 r = -EFAULT;
1168 else
1169 r = omapfb_setup_mem(fbi, &p.mem_info);
1170 break;
1171 case OMAPFB_QUERY_MEM:
1172 if ((r = omapfb_query_mem(fbi, &p.mem_info)) < 0)
1173 break;
1174 if (copy_to_user((void __user *)arg, &p.mem_info,
1175 sizeof(p.mem_info)))
1176 r = -EFAULT;
1177 break;
1178 case OMAPFB_SET_COLOR_KEY:
1179 if (copy_from_user(&p.color_key, (void __user *)arg,
1180 sizeof(p.color_key)))
1181 r = -EFAULT;
1182 else
1183 r = omapfb_set_color_key(fbdev, &p.color_key);
1184 break;
1185 case OMAPFB_GET_COLOR_KEY:
1186 if ((r = omapfb_get_color_key(fbdev, &p.color_key)) < 0)
1187 break;
1188 if (copy_to_user((void __user *)arg, &p.color_key,
1189 sizeof(p.color_key)))
1190 r = -EFAULT;
1191 break;
1192 case OMAPFB_GET_CAPS:
1193 omapfb_get_caps(fbdev, plane->idx, &p.caps);
1194 if (copy_to_user((void __user *)arg, &p.caps, sizeof(p.caps)))
1195 r = -EFAULT;
1196 break;
1197 case OMAPFB_LCD_TEST:
1198 {
1199 int test_num;
1200
1201 if (get_user(test_num, (int __user *)arg)) {
1202 r = -EFAULT;
1203 break;
1204 }
1205 if (!fbdev->panel->run_test) {
1206 r = -EINVAL;
1207 break;
1208 }
1209 r = fbdev->panel->run_test(fbdev->panel, test_num);
1210 break;
1211 }
1212 case OMAPFB_CTRL_TEST:
1213 {
1214 int test_num;
1215
1216 if (get_user(test_num, (int __user *)arg)) {
1217 r = -EFAULT;
1218 break;
1219 }
1220 if (!fbdev->ctrl->run_test) {
1221 r = -EINVAL;
1222 break;
1223 }
1224 r = fbdev->ctrl->run_test(test_num);
1225 break;
1226 }
1227 default:
1228 r = -EINVAL;
1229 }
1230
1231 return r;
1232 }
1233
1234 static int omapfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
1235 {
1236 struct omapfb_plane_struct *plane = info->par;
1237 struct omapfb_device *fbdev = plane->fbdev;
1238 int r;
1239
1240 omapfb_rqueue_lock(fbdev);
1241 r = fbdev->ctrl->mmap(info, vma);
1242 omapfb_rqueue_unlock(fbdev);
1243
1244 return r;
1245 }
1246
1247 /*
1248 * Callback table for the frame buffer framework. Some of these pointers
1249 * will be changed according to the current setting of fb_info->accel_flags.
1250 */
1251 static struct fb_ops omapfb_ops = {
1252 .owner = THIS_MODULE,
1253 .fb_open = omapfb_open,
1254 .fb_release = omapfb_release,
1255 .fb_setcolreg = omapfb_setcolreg,
1256 .fb_setcmap = omapfb_setcmap,
1257 .fb_fillrect = cfb_fillrect,
1258 .fb_copyarea = cfb_copyarea,
1259 .fb_imageblit = cfb_imageblit,
1260 .fb_blank = omapfb_blank,
1261 .fb_ioctl = omapfb_ioctl,
1262 .fb_check_var = omapfb_check_var,
1263 .fb_set_par = omapfb_set_par,
1264 .fb_rotate = omapfb_rotate,
1265 .fb_pan_display = omapfb_pan_display,
1266 };
1267
1268 /*
1269 * ---------------------------------------------------------------------------
1270 * Sysfs interface
1271 * ---------------------------------------------------------------------------
1272 */
1273 /* omapfbX sysfs entries */
1274 static ssize_t omapfb_show_caps_num(struct device *dev,
1275 struct device_attribute *attr, char *buf)
1276 {
1277 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1278 int plane;
1279 size_t size;
1280 struct omapfb_caps caps;
1281
1282 plane = 0;
1283 size = 0;
1284 while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1285 omapfb_get_caps(fbdev, plane, &caps);
1286 size += snprintf(&buf[size], PAGE_SIZE - size,
1287 "plane#%d %#010x %#010x %#010x\n",
1288 plane, caps.ctrl, caps.plane_color, caps.wnd_color);
1289 plane++;
1290 }
1291 return size;
1292 }
1293
1294 static ssize_t omapfb_show_caps_text(struct device *dev,
1295 struct device_attribute *attr, char *buf)
1296 {
1297 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1298 int i;
1299 struct omapfb_caps caps;
1300 int plane;
1301 size_t size;
1302
1303 plane = 0;
1304 size = 0;
1305 while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1306 omapfb_get_caps(fbdev, plane, &caps);
1307 size += snprintf(&buf[size], PAGE_SIZE - size,
1308 "plane#%d:\n", plane);
1309 for (i = 0; i < ARRAY_SIZE(ctrl_caps) &&
1310 size < PAGE_SIZE; i++) {
1311 if (ctrl_caps[i].flag & caps.ctrl)
1312 size += snprintf(&buf[size], PAGE_SIZE - size,
1313 " %s\n", ctrl_caps[i].name);
1314 }
1315 size += snprintf(&buf[size], PAGE_SIZE - size,
1316 " plane colors:\n");
1317 for (i = 0; i < ARRAY_SIZE(color_caps) &&
1318 size < PAGE_SIZE; i++) {
1319 if (color_caps[i].flag & caps.plane_color)
1320 size += snprintf(&buf[size], PAGE_SIZE - size,
1321 " %s\n", color_caps[i].name);
1322 }
1323 size += snprintf(&buf[size], PAGE_SIZE - size,
1324 " window colors:\n");
1325 for (i = 0; i < ARRAY_SIZE(color_caps) &&
1326 size < PAGE_SIZE; i++) {
1327 if (color_caps[i].flag & caps.wnd_color)
1328 size += snprintf(&buf[size], PAGE_SIZE - size,
1329 " %s\n", color_caps[i].name);
1330 }
1331
1332 plane++;
1333 }
1334 return size;
1335 }
1336
1337 static DEVICE_ATTR(caps_num, 0444, omapfb_show_caps_num, NULL);
1338 static DEVICE_ATTR(caps_text, 0444, omapfb_show_caps_text, NULL);
1339
1340 /* panel sysfs entries */
1341 static ssize_t omapfb_show_panel_name(struct device *dev,
1342 struct device_attribute *attr, char *buf)
1343 {
1344 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1345
1346 return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->panel->name);
1347 }
1348
1349 static ssize_t omapfb_show_bklight_level(struct device *dev,
1350 struct device_attribute *attr,
1351 char *buf)
1352 {
1353 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1354 int r;
1355
1356 if (fbdev->panel->get_bklight_level) {
1357 r = snprintf(buf, PAGE_SIZE, "%d\n",
1358 fbdev->panel->get_bklight_level(fbdev->panel));
1359 } else
1360 r = -ENODEV;
1361 return r;
1362 }
1363
1364 static ssize_t omapfb_store_bklight_level(struct device *dev,
1365 struct device_attribute *attr,
1366 const char *buf, size_t size)
1367 {
1368 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1369 int r;
1370
1371 if (fbdev->panel->set_bklight_level) {
1372 unsigned int level;
1373
1374 if (sscanf(buf, "%10d", &level) == 1) {
1375 r = fbdev->panel->set_bklight_level(fbdev->panel,
1376 level);
1377 } else
1378 r = -EINVAL;
1379 } else
1380 r = -ENODEV;
1381 return r ? r : size;
1382 }
1383
1384 static ssize_t omapfb_show_bklight_max(struct device *dev,
1385 struct device_attribute *attr, char *buf)
1386 {
1387 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1388 int r;
1389
1390 if (fbdev->panel->get_bklight_level) {
1391 r = snprintf(buf, PAGE_SIZE, "%d\n",
1392 fbdev->panel->get_bklight_max(fbdev->panel));
1393 } else
1394 r = -ENODEV;
1395 return r;
1396 }
1397
1398 static struct device_attribute dev_attr_panel_name =
1399 __ATTR(name, 0444, omapfb_show_panel_name, NULL);
1400 static DEVICE_ATTR(backlight_level, 0664,
1401 omapfb_show_bklight_level, omapfb_store_bklight_level);
1402 static DEVICE_ATTR(backlight_max, 0444, omapfb_show_bklight_max, NULL);
1403
1404 static struct attribute *panel_attrs[] = {
1405 &dev_attr_panel_name.attr,
1406 &dev_attr_backlight_level.attr,
1407 &dev_attr_backlight_max.attr,
1408 NULL,
1409 };
1410
1411 static struct attribute_group panel_attr_grp = {
1412 .name = "panel",
1413 .attrs = panel_attrs,
1414 };
1415
1416 /* ctrl sysfs entries */
1417 static ssize_t omapfb_show_ctrl_name(struct device *dev,
1418 struct device_attribute *attr, char *buf)
1419 {
1420 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1421
1422 return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->ctrl->name);
1423 }
1424
1425 static struct device_attribute dev_attr_ctrl_name =
1426 __ATTR(name, 0444, omapfb_show_ctrl_name, NULL);
1427
1428 static struct attribute *ctrl_attrs[] = {
1429 &dev_attr_ctrl_name.attr,
1430 NULL,
1431 };
1432
1433 static struct attribute_group ctrl_attr_grp = {
1434 .name = "ctrl",
1435 .attrs = ctrl_attrs,
1436 };
1437
1438 static int omapfb_register_sysfs(struct omapfb_device *fbdev)
1439 {
1440 int r;
1441
1442 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_num)))
1443 goto fail0;
1444
1445 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_text)))
1446 goto fail1;
1447
1448 if ((r = sysfs_create_group(&fbdev->dev->kobj, &panel_attr_grp)))
1449 goto fail2;
1450
1451 if ((r = sysfs_create_group(&fbdev->dev->kobj, &ctrl_attr_grp)))
1452 goto fail3;
1453
1454 return 0;
1455 fail3:
1456 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1457 fail2:
1458 device_remove_file(fbdev->dev, &dev_attr_caps_text);
1459 fail1:
1460 device_remove_file(fbdev->dev, &dev_attr_caps_num);
1461 fail0:
1462 dev_err(fbdev->dev, "unable to register sysfs interface\n");
1463 return r;
1464 }
1465
1466 static void omapfb_unregister_sysfs(struct omapfb_device *fbdev)
1467 {
1468 sysfs_remove_group(&fbdev->dev->kobj, &ctrl_attr_grp);
1469 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1470 device_remove_file(fbdev->dev, &dev_attr_caps_num);
1471 device_remove_file(fbdev->dev, &dev_attr_caps_text);
1472 }
1473
1474 /*
1475 * ---------------------------------------------------------------------------
1476 * LDM callbacks
1477 * ---------------------------------------------------------------------------
1478 */
1479 /* Initialize system fb_info object and set the default video mode.
1480 * The frame buffer memory already allocated by lcddma_init
1481 */
1482 static int fbinfo_init(struct omapfb_device *fbdev, struct fb_info *info)
1483 {
1484 struct fb_var_screeninfo *var = &info->var;
1485 struct fb_fix_screeninfo *fix = &info->fix;
1486 int r = 0;
1487
1488 info->fbops = &omapfb_ops;
1489 info->flags = FBINFO_FLAG_DEFAULT;
1490
1491 strncpy(fix->id, MODULE_NAME, sizeof(fix->id));
1492
1493 info->pseudo_palette = fbdev->pseudo_palette;
1494
1495 var->accel_flags = def_accel ? FB_ACCELF_TEXT : 0;
1496 var->xres = def_vxres;
1497 var->yres = def_vyres;
1498 var->xres_virtual = def_vxres;
1499 var->yres_virtual = def_vyres;
1500 var->rotate = def_rotate;
1501 var->bits_per_pixel = fbdev->panel->bpp;
1502
1503 set_fb_var(info, var);
1504 set_fb_fix(info, 1);
1505
1506 r = fb_alloc_cmap(&info->cmap, 16, 0);
1507 if (r != 0)
1508 dev_err(fbdev->dev, "unable to allocate color map memory\n");
1509
1510 return r;
1511 }
1512
1513 /* Release the fb_info object */
1514 static void fbinfo_cleanup(struct omapfb_device *fbdev, struct fb_info *fbi)
1515 {
1516 fb_dealloc_cmap(&fbi->cmap);
1517 }
1518
1519 static void planes_cleanup(struct omapfb_device *fbdev)
1520 {
1521 int i;
1522
1523 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1524 if (fbdev->fb_info[i] == NULL)
1525 break;
1526 fbinfo_cleanup(fbdev, fbdev->fb_info[i]);
1527 framebuffer_release(fbdev->fb_info[i]);
1528 }
1529 }
1530
1531 static int planes_init(struct omapfb_device *fbdev)
1532 {
1533 struct fb_info *fbi;
1534 int i;
1535 int r;
1536
1537 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1538 struct omapfb_plane_struct *plane;
1539 fbi = framebuffer_alloc(sizeof(struct omapfb_plane_struct),
1540 fbdev->dev);
1541 if (fbi == NULL) {
1542 dev_err(fbdev->dev,
1543 "unable to allocate memory for plane info\n");
1544 planes_cleanup(fbdev);
1545 return -ENOMEM;
1546 }
1547 plane = fbi->par;
1548 plane->idx = i;
1549 plane->fbdev = fbdev;
1550 plane->info.mirror = def_mirror;
1551 fbdev->fb_info[i] = fbi;
1552
1553 if ((r = fbinfo_init(fbdev, fbi)) < 0) {
1554 framebuffer_release(fbi);
1555 planes_cleanup(fbdev);
1556 return r;
1557 }
1558 plane->info.out_width = fbi->var.xres;
1559 plane->info.out_height = fbi->var.yres;
1560 }
1561 return 0;
1562 }
1563
1564 /*
1565 * Free driver resources. Can be called to rollback an aborted initialization
1566 * sequence.
1567 */
1568 static void omapfb_free_resources(struct omapfb_device *fbdev, int state)
1569 {
1570 int i;
1571
1572 switch (state) {
1573 case OMAPFB_ACTIVE:
1574 for (i = 0; i < fbdev->mem_desc.region_cnt; i++)
1575 unregister_framebuffer(fbdev->fb_info[i]);
1576 case 7:
1577 omapfb_unregister_sysfs(fbdev);
1578 case 6:
1579 fbdev->panel->disable(fbdev->panel);
1580 case 5:
1581 omapfb_set_update_mode(fbdev, OMAPFB_UPDATE_DISABLED);
1582 case 4:
1583 planes_cleanup(fbdev);
1584 case 3:
1585 ctrl_cleanup(fbdev);
1586 case 2:
1587 fbdev->panel->cleanup(fbdev->panel);
1588 case 1:
1589 dev_set_drvdata(fbdev->dev, NULL);
1590 kfree(fbdev);
1591 case 0:
1592 /* nothing to free */
1593 break;
1594 default:
1595 BUG();
1596 }
1597 }
1598
1599 static int omapfb_find_ctrl(struct omapfb_device *fbdev)
1600 {
1601 struct omapfb_platform_data *conf;
1602 char name[17];
1603 int i;
1604
1605 conf = fbdev->dev->platform_data;
1606
1607 fbdev->ctrl = NULL;
1608
1609 strncpy(name, conf->lcd.ctrl_name, sizeof(name) - 1);
1610 name[sizeof(name) - 1] = '\0';
1611
1612 if (strcmp(name, "internal") == 0) {
1613 fbdev->ctrl = fbdev->int_ctrl;
1614 return 0;
1615 }
1616
1617 for (i = 0; i < ARRAY_SIZE(ctrls); i++) {
1618 dev_dbg(fbdev->dev, "ctrl %s\n", ctrls[i]->name);
1619 if (strcmp(ctrls[i]->name, name) == 0) {
1620 fbdev->ctrl = ctrls[i];
1621 break;
1622 }
1623 }
1624
1625 if (fbdev->ctrl == NULL) {
1626 dev_dbg(fbdev->dev, "ctrl %s not supported\n", name);
1627 return -1;
1628 }
1629
1630 return 0;
1631 }
1632
1633 static void check_required_callbacks(struct omapfb_device *fbdev)
1634 {
1635 #define _C(x) (fbdev->ctrl->x != NULL)
1636 #define _P(x) (fbdev->panel->x != NULL)
1637 BUG_ON(fbdev->ctrl == NULL || fbdev->panel == NULL);
1638 BUG_ON(!(_C(init) && _C(cleanup) && _C(get_caps) &&
1639 _C(set_update_mode) && _C(setup_plane) && _C(enable_plane) &&
1640 _P(init) && _P(cleanup) && _P(enable) && _P(disable) &&
1641 _P(get_caps)));
1642 #undef _P
1643 #undef _C
1644 }
1645
1646 /*
1647 * Called by LDM binding to probe and attach a new device.
1648 * Initialization sequence:
1649 * 1. allocate system omapfb_device structure
1650 * 2. select controller type according to platform configuration
1651 * init LCD panel
1652 * 3. init LCD controller and LCD DMA
1653 * 4. init system fb_info structure for all planes
1654 * 5. setup video mode for first plane and enable it
1655 * 6. enable LCD panel
1656 * 7. register sysfs attributes
1657 * OMAPFB_ACTIVE: register system fb_info structure for all planes
1658 */
1659 static int omapfb_do_probe(struct platform_device *pdev,
1660 struct lcd_panel *panel)
1661 {
1662 struct omapfb_device *fbdev = NULL;
1663 int init_state;
1664 unsigned long phz, hhz, vhz;
1665 unsigned long vram;
1666 int i;
1667 int r = 0;
1668
1669 init_state = 0;
1670
1671 if (pdev->num_resources != 0) {
1672 dev_err(&pdev->dev, "probed for an unknown device\n");
1673 r = -ENODEV;
1674 goto cleanup;
1675 }
1676
1677 if (pdev->dev.platform_data == NULL) {
1678 dev_err(&pdev->dev, "missing platform data\n");
1679 r = -ENOENT;
1680 goto cleanup;
1681 }
1682
1683 fbdev = kzalloc(sizeof(struct omapfb_device), GFP_KERNEL);
1684 if (fbdev == NULL) {
1685 dev_err(&pdev->dev,
1686 "unable to allocate memory for device info\n");
1687 r = -ENOMEM;
1688 goto cleanup;
1689 }
1690 init_state++;
1691
1692 fbdev->dev = &pdev->dev;
1693 fbdev->panel = panel;
1694 fbdev->dssdev = &omapdss_device;
1695 platform_set_drvdata(pdev, fbdev);
1696
1697 mutex_init(&fbdev->rqueue_mutex);
1698
1699 fbdev->int_ctrl = &omap1_int_ctrl;
1700 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
1701 fbdev->ext_if = &omap1_ext_if;
1702 #endif
1703 if (omapfb_find_ctrl(fbdev) < 0) {
1704 dev_err(fbdev->dev,
1705 "LCD controller not found, board not supported\n");
1706 r = -ENODEV;
1707 goto cleanup;
1708 }
1709
1710 r = fbdev->panel->init(fbdev->panel, fbdev);
1711 if (r)
1712 goto cleanup;
1713
1714 pr_info("omapfb: configured for panel %s\n", fbdev->panel->name);
1715
1716 def_vxres = def_vxres ? def_vxres : fbdev->panel->x_res;
1717 def_vyres = def_vyres ? def_vyres : fbdev->panel->y_res;
1718
1719 init_state++;
1720
1721 r = ctrl_init(fbdev);
1722 if (r)
1723 goto cleanup;
1724 if (fbdev->ctrl->mmap != NULL)
1725 omapfb_ops.fb_mmap = omapfb_mmap;
1726 init_state++;
1727
1728 check_required_callbacks(fbdev);
1729
1730 r = planes_init(fbdev);
1731 if (r)
1732 goto cleanup;
1733 init_state++;
1734
1735 #ifdef CONFIG_FB_OMAP_DMA_TUNE
1736 /* Set DMA priority for EMIFF access to highest */
1737 omap_set_dma_priority(0, OMAP_DMA_PORT_EMIFF, 15);
1738 #endif
1739
1740 r = ctrl_change_mode(fbdev->fb_info[0]);
1741 if (r) {
1742 dev_err(fbdev->dev, "mode setting failed\n");
1743 goto cleanup;
1744 }
1745
1746 /* GFX plane is enabled by default */
1747 r = fbdev->ctrl->enable_plane(OMAPFB_PLANE_GFX, 1);
1748 if (r)
1749 goto cleanup;
1750
1751 omapfb_set_update_mode(fbdev, manual_update ?
1752 OMAPFB_MANUAL_UPDATE : OMAPFB_AUTO_UPDATE);
1753 init_state++;
1754
1755 r = fbdev->panel->enable(fbdev->panel);
1756 if (r)
1757 goto cleanup;
1758 init_state++;
1759
1760 r = omapfb_register_sysfs(fbdev);
1761 if (r)
1762 goto cleanup;
1763 init_state++;
1764
1765 vram = 0;
1766 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1767 r = register_framebuffer(fbdev->fb_info[i]);
1768 if (r != 0) {
1769 dev_err(fbdev->dev,
1770 "registering framebuffer %d failed\n", i);
1771 goto cleanup;
1772 }
1773 vram += fbdev->mem_desc.region[i].size;
1774 }
1775
1776 fbdev->state = OMAPFB_ACTIVE;
1777
1778 panel = fbdev->panel;
1779 phz = panel->pixel_clock * 1000;
1780 hhz = phz * 10 / (panel->hfp + panel->x_res + panel->hbp + panel->hsw);
1781 vhz = hhz / (panel->vfp + panel->y_res + panel->vbp + panel->vsw);
1782
1783 omapfb_dev = fbdev;
1784
1785 pr_info("omapfb: Framebuffer initialized. Total vram %lu planes %d\n",
1786 vram, fbdev->mem_desc.region_cnt);
1787 pr_info("omapfb: Pixclock %lu kHz hfreq %lu.%lu kHz "
1788 "vfreq %lu.%lu Hz\n",
1789 phz / 1000, hhz / 10000, hhz % 10, vhz / 10, vhz % 10);
1790
1791 return 0;
1792
1793 cleanup:
1794 omapfb_free_resources(fbdev, init_state);
1795
1796 return r;
1797 }
1798
1799 static int omapfb_probe(struct platform_device *pdev)
1800 {
1801 int r;
1802
1803 BUG_ON(fbdev_pdev != NULL);
1804
1805 r = platform_device_register(&omapdss_device);
1806 if (r) {
1807 dev_err(&pdev->dev, "can't register omapdss device\n");
1808 return r;
1809 }
1810
1811 /* Delay actual initialization until the LCD is registered */
1812 fbdev_pdev = pdev;
1813 if (fbdev_panel != NULL)
1814 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1815 return 0;
1816 }
1817
1818 void omapfb_register_panel(struct lcd_panel *panel)
1819 {
1820 BUG_ON(fbdev_panel != NULL);
1821
1822 fbdev_panel = panel;
1823 if (fbdev_pdev != NULL)
1824 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1825 }
1826
1827 /* Called when the device is being detached from the driver */
1828 static int omapfb_remove(struct platform_device *pdev)
1829 {
1830 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1831 enum omapfb_state saved_state = fbdev->state;
1832
1833 /* FIXME: wait till completion of pending events */
1834
1835 fbdev->state = OMAPFB_DISABLED;
1836 omapfb_free_resources(fbdev, saved_state);
1837
1838 platform_device_unregister(&omapdss_device);
1839 fbdev->dssdev = NULL;
1840
1841 return 0;
1842 }
1843
1844 /* PM suspend */
1845 static int omapfb_suspend(struct platform_device *pdev, pm_message_t mesg)
1846 {
1847 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1848
1849 if (fbdev != NULL)
1850 omapfb_blank(FB_BLANK_POWERDOWN, fbdev->fb_info[0]);
1851 return 0;
1852 }
1853
1854 /* PM resume */
1855 static int omapfb_resume(struct platform_device *pdev)
1856 {
1857 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1858
1859 if (fbdev != NULL)
1860 omapfb_blank(FB_BLANK_UNBLANK, fbdev->fb_info[0]);
1861 return 0;
1862 }
1863
1864 static struct platform_driver omapfb_driver = {
1865 .probe = omapfb_probe,
1866 .remove = omapfb_remove,
1867 .suspend = omapfb_suspend,
1868 .resume = omapfb_resume,
1869 .driver = {
1870 .name = MODULE_NAME,
1871 .owner = THIS_MODULE,
1872 },
1873 };
1874
1875 #ifndef MODULE
1876
1877 /* Process kernel command line parameters */
1878 static int __init omapfb_setup(char *options)
1879 {
1880 char *this_opt = NULL;
1881 int r = 0;
1882
1883 pr_debug("omapfb: options %s\n", options);
1884
1885 if (!options || !*options)
1886 return 0;
1887
1888 while (!r && (this_opt = strsep(&options, ",")) != NULL) {
1889 if (!strncmp(this_opt, "accel", 5))
1890 def_accel = 1;
1891 else if (!strncmp(this_opt, "vram:", 5)) {
1892 char *suffix;
1893 unsigned long vram;
1894 vram = (simple_strtoul(this_opt + 5, &suffix, 0));
1895 switch (suffix[0]) {
1896 case '\0':
1897 break;
1898 case 'm':
1899 case 'M':
1900 vram *= 1024;
1901 /* Fall through */
1902 case 'k':
1903 case 'K':
1904 vram *= 1024;
1905 break;
1906 default:
1907 pr_debug("omapfb: invalid vram suffix %c\n",
1908 suffix[0]);
1909 r = -1;
1910 }
1911 def_vram[def_vram_cnt++] = vram;
1912 }
1913 else if (!strncmp(this_opt, "vxres:", 6))
1914 def_vxres = simple_strtoul(this_opt + 6, NULL, 0);
1915 else if (!strncmp(this_opt, "vyres:", 6))
1916 def_vyres = simple_strtoul(this_opt + 6, NULL, 0);
1917 else if (!strncmp(this_opt, "rotate:", 7))
1918 def_rotate = (simple_strtoul(this_opt + 7, NULL, 0));
1919 else if (!strncmp(this_opt, "mirror:", 7))
1920 def_mirror = (simple_strtoul(this_opt + 7, NULL, 0));
1921 else if (!strncmp(this_opt, "manual_update", 13))
1922 manual_update = 1;
1923 else {
1924 pr_debug("omapfb: invalid option\n");
1925 r = -1;
1926 }
1927 }
1928
1929 return r;
1930 }
1931
1932 #endif
1933
1934 /* Register both the driver and the device */
1935 static int __init omapfb_init(void)
1936 {
1937 #ifndef MODULE
1938 char *option;
1939
1940 if (fb_get_options("omapfb", &option))
1941 return -ENODEV;
1942 omapfb_setup(option);
1943 #endif
1944 /* Register the driver with LDM */
1945 if (platform_driver_register(&omapfb_driver)) {
1946 pr_debug("failed to register omapfb driver\n");
1947 return -ENODEV;
1948 }
1949
1950 return 0;
1951 }
1952
1953 static void __exit omapfb_cleanup(void)
1954 {
1955 platform_driver_unregister(&omapfb_driver);
1956 }
1957
1958 module_param_named(accel, def_accel, uint, 0664);
1959 module_param_array_named(vram, def_vram, ulong, &def_vram_cnt, 0664);
1960 module_param_named(vxres, def_vxres, long, 0664);
1961 module_param_named(vyres, def_vyres, long, 0664);
1962 module_param_named(rotate, def_rotate, uint, 0664);
1963 module_param_named(mirror, def_mirror, uint, 0664);
1964 module_param_named(manual_update, manual_update, bool, 0664);
1965
1966 module_init(omapfb_init);
1967 module_exit(omapfb_cleanup);
1968
1969 MODULE_DESCRIPTION("TI OMAP framebuffer driver");
1970 MODULE_AUTHOR("Imre Deak <imre.deak@nokia.com>");
1971 MODULE_LICENSE("GPL");
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