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Linux 3.4.102
[linux/fpc-iii.git] / drivers / video / omap / omapfb_main.c
blobf54b463709e9f5808f37bf4bb187da6a560fb06e
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
38 #define MODULE_NAME "omapfb"
39
40 static unsigned int def_accel;
41 static unsigned long def_vram[OMAPFB_PLANE_NUM];
42 static unsigned int def_vram_cnt;
43 static unsigned long def_vxres;
44 static unsigned long def_vyres;
45 static unsigned int def_rotate;
46 static unsigned int def_mirror;
47
48 #ifdef CONFIG_FB_OMAP_MANUAL_UPDATE
49 static bool manual_update = 1;
50 #else
51 static bool manual_update;
52 #endif
53
54 static struct platform_device *fbdev_pdev;
55 static struct lcd_panel *fbdev_panel;
56 static struct omapfb_device *omapfb_dev;
57
58 struct caps_table_struct {
59 unsigned long flag;
60 const char *name;
61 };
62
63 static struct caps_table_struct ctrl_caps[] = {
64 { OMAPFB_CAPS_MANUAL_UPDATE, "manual update" },
65 { OMAPFB_CAPS_TEARSYNC, "tearing synchronization" },
66 { OMAPFB_CAPS_PLANE_RELOCATE_MEM, "relocate plane memory" },
67 { OMAPFB_CAPS_PLANE_SCALE, "scale plane" },
68 { OMAPFB_CAPS_WINDOW_PIXEL_DOUBLE, "pixel double window" },
69 { OMAPFB_CAPS_WINDOW_SCALE, "scale window" },
70 { OMAPFB_CAPS_WINDOW_OVERLAY, "overlay window" },
71 { OMAPFB_CAPS_WINDOW_ROTATE, "rotate window" },
72 { OMAPFB_CAPS_SET_BACKLIGHT, "backlight setting" },
73 };
74
75 static struct caps_table_struct color_caps[] = {
76 { 1 << OMAPFB_COLOR_RGB565, "RGB565", },
77 { 1 << OMAPFB_COLOR_YUV422, "YUV422", },
78 { 1 << OMAPFB_COLOR_YUV420, "YUV420", },
79 { 1 << OMAPFB_COLOR_CLUT_8BPP, "CLUT8", },
80 { 1 << OMAPFB_COLOR_CLUT_4BPP, "CLUT4", },
81 { 1 << OMAPFB_COLOR_CLUT_2BPP, "CLUT2", },
82 { 1 << OMAPFB_COLOR_CLUT_1BPP, "CLUT1", },
83 { 1 << OMAPFB_COLOR_RGB444, "RGB444", },
84 { 1 << OMAPFB_COLOR_YUY422, "YUY422", },
85 };
86
87 static void omapdss_release(struct device *dev)
88 {
89 }
90
91 /* dummy device for clocks */
92 static struct platform_device omapdss_device = {
93 .name = "omapdss_dss",
94 .id = -1,
95 .dev = {
96 .release = omapdss_release,
97 },
98 };
99
100 /*
101 * ---------------------------------------------------------------------------
102 * LCD panel
103 * ---------------------------------------------------------------------------
104 */
105 extern struct lcd_ctrl hwa742_ctrl;
106
107 static const struct lcd_ctrl *ctrls[] = {
108 &omap1_int_ctrl,
109
110 #ifdef CONFIG_FB_OMAP_LCDC_HWA742
111 &hwa742_ctrl,
112 #endif
113 };
114
115 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
116 extern struct lcd_ctrl_extif omap1_ext_if;
117 #endif
118
119 static void omapfb_rqueue_lock(struct omapfb_device *fbdev)
120 {
121 mutex_lock(&fbdev->rqueue_mutex);
122 }
123
124 static void omapfb_rqueue_unlock(struct omapfb_device *fbdev)
125 {
126 mutex_unlock(&fbdev->rqueue_mutex);
127 }
128
129 /*
130 * ---------------------------------------------------------------------------
131 * LCD controller and LCD DMA
132 * ---------------------------------------------------------------------------
133 */
134 /* Lookup table to map elem size to elem type. */
135 static const int dma_elem_type[] = {
136 0,
137 OMAP_DMA_DATA_TYPE_S8,
138 OMAP_DMA_DATA_TYPE_S16,
139 0,
140 OMAP_DMA_DATA_TYPE_S32,
141 };
142
143 /*
144 * Allocate resources needed for LCD controller and LCD DMA operations. Video
145 * memory is allocated from system memory according to the virtual display
146 * size, except if a bigger memory size is specified explicitly as a kernel
147 * parameter.
148 */
149 static int ctrl_init(struct omapfb_device *fbdev)
150 {
151 int r;
152 int i;
153
154 /* kernel/module vram parameters override boot tags/board config */
155 if (def_vram_cnt) {
156 for (i = 0; i < def_vram_cnt; i++)
157 fbdev->mem_desc.region[i].size =
158 PAGE_ALIGN(def_vram[i]);
159 fbdev->mem_desc.region_cnt = i;
160 }
161
162 if (!fbdev->mem_desc.region_cnt) {
163 struct lcd_panel *panel = fbdev->panel;
164 int def_size;
165 int bpp = panel->bpp;
166
167 /* 12 bpp is packed in 16 bits */
168 if (bpp == 12)
169 bpp = 16;
170 def_size = def_vxres * def_vyres * bpp / 8;
171 fbdev->mem_desc.region_cnt = 1;
172 fbdev->mem_desc.region[0].size = PAGE_ALIGN(def_size);
173 }
174 r = fbdev->ctrl->init(fbdev, 0, &fbdev->mem_desc);
175 if (r < 0) {
176 dev_err(fbdev->dev, "controller initialization failed (%d)\n",
177 r);
178 return r;
179 }
180
181 #ifdef DEBUG
182 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
183 dev_dbg(fbdev->dev, "region%d phys %08x virt %p size=%lu\n",
184 i,
185 fbdev->mem_desc.region[i].paddr,
186 fbdev->mem_desc.region[i].vaddr,
187 fbdev->mem_desc.region[i].size);
188 }
189 #endif
190 return 0;
191 }
192
193 static void ctrl_cleanup(struct omapfb_device *fbdev)
194 {
195 fbdev->ctrl->cleanup();
196 }
197
198 /* Must be called with fbdev->rqueue_mutex held. */
199 static int ctrl_change_mode(struct fb_info *fbi)
200 {
201 int r;
202 unsigned long offset;
203 struct omapfb_plane_struct *plane = fbi->par;
204 struct omapfb_device *fbdev = plane->fbdev;
205 struct fb_var_screeninfo *var = &fbi->var;
206
207 offset = var->yoffset * fbi->fix.line_length +
208 var->xoffset * var->bits_per_pixel / 8;
209
210 if (fbdev->ctrl->sync)
211 fbdev->ctrl->sync();
212 r = fbdev->ctrl->setup_plane(plane->idx, plane->info.channel_out,
213 offset, var->xres_virtual,
214 plane->info.pos_x, plane->info.pos_y,
215 var->xres, var->yres, plane->color_mode);
216 if (r < 0)
217 return r;
218
219 if (fbdev->ctrl->set_rotate != NULL) {
220 r = fbdev->ctrl->set_rotate(var->rotate);
221 if (r < 0)
222 return r;
223 }
224
225 if (fbdev->ctrl->set_scale != NULL)
226 r = fbdev->ctrl->set_scale(plane->idx,
227 var->xres, var->yres,
228 plane->info.out_width,
229 plane->info.out_height);
230
231 return r;
232 }
233
234 /*
235 * ---------------------------------------------------------------------------
236 * fbdev framework callbacks and the ioctl interface
237 * ---------------------------------------------------------------------------
238 */
239 /* Called each time the omapfb device is opened */
240 static int omapfb_open(struct fb_info *info, int user)
241 {
242 return 0;
243 }
244
245 static void omapfb_sync(struct fb_info *info);
246
247 /* Called when the omapfb device is closed. We make sure that any pending
248 * gfx DMA operations are ended, before we return. */
249 static int omapfb_release(struct fb_info *info, int user)
250 {
251 omapfb_sync(info);
252 return 0;
253 }
254
255 /* Store a single color palette entry into a pseudo palette or the hardware
256 * palette if one is available. For now we support only 16bpp and thus store
257 * the entry only to the pseudo palette.
258 */
259 static int _setcolreg(struct fb_info *info, u_int regno, u_int red, u_int green,
260 u_int blue, u_int transp, int update_hw_pal)
261 {
262 struct omapfb_plane_struct *plane = info->par;
263 struct omapfb_device *fbdev = plane->fbdev;
264 struct fb_var_screeninfo *var = &info->var;
265 int r = 0;
266
267 switch (plane->color_mode) {
268 case OMAPFB_COLOR_YUV422:
269 case OMAPFB_COLOR_YUV420:
270 case OMAPFB_COLOR_YUY422:
271 r = -EINVAL;
272 break;
273 case OMAPFB_COLOR_CLUT_8BPP:
274 case OMAPFB_COLOR_CLUT_4BPP:
275 case OMAPFB_COLOR_CLUT_2BPP:
276 case OMAPFB_COLOR_CLUT_1BPP:
277 if (fbdev->ctrl->setcolreg)
278 r = fbdev->ctrl->setcolreg(regno, red, green, blue,
279 transp, update_hw_pal);
280 /* Fallthrough */
281 case OMAPFB_COLOR_RGB565:
282 case OMAPFB_COLOR_RGB444:
283 if (r != 0)
284 break;
285
286 if (regno < 0) {
287 r = -EINVAL;
288 break;
289 }
290
291 if (regno < 16) {
292 u16 pal;
293 pal = ((red >> (16 - var->red.length)) <<
294 var->red.offset) |
295 ((green >> (16 - var->green.length)) <<
296 var->green.offset) |
297 (blue >> (16 - var->blue.length));
298 ((u32 *)(info->pseudo_palette))[regno] = pal;
299 }
300 break;
301 default:
302 BUG();
303 }
304 return r;
305 }
306
307 static int omapfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
308 u_int transp, struct fb_info *info)
309 {
310 return _setcolreg(info, regno, red, green, blue, transp, 1);
311 }
312
313 static int omapfb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
314 {
315 int count, index, r;
316 u16 *red, *green, *blue, *transp;
317 u16 trans = 0xffff;
318
319 red = cmap->red;
320 green = cmap->green;
321 blue = cmap->blue;
322 transp = cmap->transp;
323 index = cmap->start;
324
325 for (count = 0; count < cmap->len; count++) {
326 if (transp)
327 trans = *transp++;
328 r = _setcolreg(info, index++, *red++, *green++, *blue++, trans,
329 count == cmap->len - 1);
330 if (r != 0)
331 return r;
332 }
333
334 return 0;
335 }
336
337 static int omapfb_update_full_screen(struct fb_info *fbi);
338
339 static int omapfb_blank(int blank, struct fb_info *fbi)
340 {
341 struct omapfb_plane_struct *plane = fbi->par;
342 struct omapfb_device *fbdev = plane->fbdev;
343 int do_update = 0;
344 int r = 0;
345
346 omapfb_rqueue_lock(fbdev);
347 switch (blank) {
348 case FB_BLANK_UNBLANK:
349 if (fbdev->state == OMAPFB_SUSPENDED) {
350 if (fbdev->ctrl->resume)
351 fbdev->ctrl->resume();
352 fbdev->panel->enable(fbdev->panel);
353 fbdev->state = OMAPFB_ACTIVE;
354 if (fbdev->ctrl->get_update_mode() ==
355 OMAPFB_MANUAL_UPDATE)
356 do_update = 1;
357 }
358 break;
359 case FB_BLANK_POWERDOWN:
360 if (fbdev->state == OMAPFB_ACTIVE) {
361 fbdev->panel->disable(fbdev->panel);
362 if (fbdev->ctrl->suspend)
363 fbdev->ctrl->suspend();
364 fbdev->state = OMAPFB_SUSPENDED;
365 }
366 break;
367 default:
368 r = -EINVAL;
369 }
370 omapfb_rqueue_unlock(fbdev);
371
372 if (r == 0 && do_update)
373 r = omapfb_update_full_screen(fbi);
374
375 return r;
376 }
377
378 static void omapfb_sync(struct fb_info *fbi)
379 {
380 struct omapfb_plane_struct *plane = fbi->par;
381 struct omapfb_device *fbdev = plane->fbdev;
382
383 omapfb_rqueue_lock(fbdev);
384 if (fbdev->ctrl->sync)
385 fbdev->ctrl->sync();
386 omapfb_rqueue_unlock(fbdev);
387 }
388
389 /*
390 * Set fb_info.fix fields and also updates fbdev.
391 * When calling this fb_info.var must be set up already.
392 */
393 static void set_fb_fix(struct fb_info *fbi, int from_init)
394 {
395 struct fb_fix_screeninfo *fix = &fbi->fix;
396 struct fb_var_screeninfo *var = &fbi->var;
397 struct omapfb_plane_struct *plane = fbi->par;
398 struct omapfb_mem_region *rg;
399 int bpp;
400
401 rg = &plane->fbdev->mem_desc.region[plane->idx];
402 fbi->screen_base = rg->vaddr;
403
404 if (!from_init) {
405 mutex_lock(&fbi->mm_lock);
406 fix->smem_start = rg->paddr;
407 fix->smem_len = rg->size;
408 mutex_unlock(&fbi->mm_lock);
409 } else {
410 fix->smem_start = rg->paddr;
411 fix->smem_len = rg->size;
412 }
413
414 fix->type = FB_TYPE_PACKED_PIXELS;
415 bpp = var->bits_per_pixel;
416 if (var->nonstd)
417 fix->visual = FB_VISUAL_PSEUDOCOLOR;
418 else switch (var->bits_per_pixel) {
419 case 16:
420 case 12:
421 fix->visual = FB_VISUAL_TRUECOLOR;
422 /* 12bpp is stored in 16 bits */
423 bpp = 16;
424 break;
425 case 1:
426 case 2:
427 case 4:
428 case 8:
429 fix->visual = FB_VISUAL_PSEUDOCOLOR;
430 break;
431 }
432 fix->accel = FB_ACCEL_OMAP1610;
433 fix->line_length = var->xres_virtual * bpp / 8;
434 }
435
436 static int set_color_mode(struct omapfb_plane_struct *plane,
437 struct fb_var_screeninfo *var)
438 {
439 switch (var->nonstd) {
440 case 0:
441 break;
442 case OMAPFB_COLOR_YUV422:
443 var->bits_per_pixel = 16;
444 plane->color_mode = var->nonstd;
445 return 0;
446 case OMAPFB_COLOR_YUV420:
447 var->bits_per_pixel = 12;
448 plane->color_mode = var->nonstd;
449 return 0;
450 case OMAPFB_COLOR_YUY422:
451 var->bits_per_pixel = 16;
452 plane->color_mode = var->nonstd;
453 return 0;
454 default:
455 return -EINVAL;
456 }
457
458 switch (var->bits_per_pixel) {
459 case 1:
460 plane->color_mode = OMAPFB_COLOR_CLUT_1BPP;
461 return 0;
462 case 2:
463 plane->color_mode = OMAPFB_COLOR_CLUT_2BPP;
464 return 0;
465 case 4:
466 plane->color_mode = OMAPFB_COLOR_CLUT_4BPP;
467 return 0;
468 case 8:
469 plane->color_mode = OMAPFB_COLOR_CLUT_8BPP;
470 return 0;
471 case 12:
472 var->bits_per_pixel = 16;
473 case 16:
474 if (plane->fbdev->panel->bpp == 12)
475 plane->color_mode = OMAPFB_COLOR_RGB444;
476 else
477 plane->color_mode = OMAPFB_COLOR_RGB565;
478 return 0;
479 default:
480 return -EINVAL;
481 }
482 }
483
484 /*
485 * Check the values in var against our capabilities and in case of out of
486 * bound values try to adjust them.
487 */
488 static int set_fb_var(struct fb_info *fbi,
489 struct fb_var_screeninfo *var)
490 {
491 int bpp;
492 unsigned long max_frame_size;
493 unsigned long line_size;
494 int xres_min, xres_max;
495 int yres_min, yres_max;
496 struct omapfb_plane_struct *plane = fbi->par;
497 struct omapfb_device *fbdev = plane->fbdev;
498 struct lcd_panel *panel = fbdev->panel;
499
500 if (set_color_mode(plane, var) < 0)
501 return -EINVAL;
502
503 bpp = var->bits_per_pixel;
504 if (plane->color_mode == OMAPFB_COLOR_RGB444)
505 bpp = 16;
506
507 switch (var->rotate) {
508 case 0:
509 case 180:
510 xres_min = OMAPFB_PLANE_XRES_MIN;
511 xres_max = panel->x_res;
512 yres_min = OMAPFB_PLANE_YRES_MIN;
513 yres_max = panel->y_res;
514 if (cpu_is_omap15xx()) {
515 var->xres = panel->x_res;
516 var->yres = panel->y_res;
517 }
518 break;
519 case 90:
520 case 270:
521 xres_min = OMAPFB_PLANE_YRES_MIN;
522 xres_max = panel->y_res;
523 yres_min = OMAPFB_PLANE_XRES_MIN;
524 yres_max = panel->x_res;
525 if (cpu_is_omap15xx()) {
526 var->xres = panel->y_res;
527 var->yres = panel->x_res;
528 }
529 break;
530 default:
531 return -EINVAL;
532 }
533
534 if (var->xres < xres_min)
535 var->xres = xres_min;
536 if (var->yres < yres_min)
537 var->yres = yres_min;
538 if (var->xres > xres_max)
539 var->xres = xres_max;
540 if (var->yres > yres_max)
541 var->yres = yres_max;
542
543 if (var->xres_virtual < var->xres)
544 var->xres_virtual = var->xres;
545 if (var->yres_virtual < var->yres)
546 var->yres_virtual = var->yres;
547 max_frame_size = fbdev->mem_desc.region[plane->idx].size;
548 line_size = var->xres_virtual * bpp / 8;
549 if (line_size * var->yres_virtual > max_frame_size) {
550 /* Try to keep yres_virtual first */
551 line_size = max_frame_size / var->yres_virtual;
552 var->xres_virtual = line_size * 8 / bpp;
553 if (var->xres_virtual < var->xres) {
554 /* Still doesn't fit. Shrink yres_virtual too */
555 var->xres_virtual = var->xres;
556 line_size = var->xres * bpp / 8;
557 var->yres_virtual = max_frame_size / line_size;
558 }
559 /* Recheck this, as the virtual size changed. */
560 if (var->xres_virtual < var->xres)
561 var->xres = var->xres_virtual;
562 if (var->yres_virtual < var->yres)
563 var->yres = var->yres_virtual;
564 if (var->xres < xres_min || var->yres < yres_min)
565 return -EINVAL;
566 }
567 if (var->xres + var->xoffset > var->xres_virtual)
568 var->xoffset = var->xres_virtual - var->xres;
569 if (var->yres + var->yoffset > var->yres_virtual)
570 var->yoffset = var->yres_virtual - var->yres;
571
572 if (plane->color_mode == OMAPFB_COLOR_RGB444) {
573 var->red.offset = 8; var->red.length = 4;
574 var->red.msb_right = 0;
575 var->green.offset = 4; var->green.length = 4;
576 var->green.msb_right = 0;
577 var->blue.offset = 0; var->blue.length = 4;
578 var->blue.msb_right = 0;
579 } else {
580 var->red.offset = 11; var->red.length = 5;
581 var->red.msb_right = 0;
582 var->green.offset = 5; var->green.length = 6;
583 var->green.msb_right = 0;
584 var->blue.offset = 0; var->blue.length = 5;
585 var->blue.msb_right = 0;
586 }
587
588 var->height = -1;
589 var->width = -1;
590 var->grayscale = 0;
591
592 /* pixclock in ps, the rest in pixclock */
593 var->pixclock = 10000000 / (panel->pixel_clock / 100);
594 var->left_margin = panel->hfp;
595 var->right_margin = panel->hbp;
596 var->upper_margin = panel->vfp;
597 var->lower_margin = panel->vbp;
598 var->hsync_len = panel->hsw;
599 var->vsync_len = panel->vsw;
600
601 /* TODO: get these from panel->config */
602 var->vmode = FB_VMODE_NONINTERLACED;
603 var->sync = 0;
604
605 return 0;
606 }
607
608
609 /* Set rotation (0, 90, 180, 270 degree), and switch to the new mode. */
610 static void omapfb_rotate(struct fb_info *fbi, int rotate)
611 {
612 struct omapfb_plane_struct *plane = fbi->par;
613 struct omapfb_device *fbdev = plane->fbdev;
614
615 omapfb_rqueue_lock(fbdev);
616 if (rotate != fbi->var.rotate) {
617 struct fb_var_screeninfo *new_var = &fbdev->new_var;
618
619 memcpy(new_var, &fbi->var, sizeof(*new_var));
620 new_var->rotate = rotate;
621 if (set_fb_var(fbi, new_var) == 0 &&
622 memcmp(new_var, &fbi->var, sizeof(*new_var))) {
623 memcpy(&fbi->var, new_var, sizeof(*new_var));
624 ctrl_change_mode(fbi);
625 }
626 }
627 omapfb_rqueue_unlock(fbdev);
628 }
629
630 /*
631 * Set new x,y offsets in the virtual display for the visible area and switch
632 * to the new mode.
633 */
634 static int omapfb_pan_display(struct fb_var_screeninfo *var,
635 struct fb_info *fbi)
636 {
637 struct omapfb_plane_struct *plane = fbi->par;
638 struct omapfb_device *fbdev = plane->fbdev;
639 int r = 0;
640
641 omapfb_rqueue_lock(fbdev);
642 if (var->xoffset != fbi->var.xoffset ||
643 var->yoffset != fbi->var.yoffset) {
644 struct fb_var_screeninfo *new_var = &fbdev->new_var;
645
646 memcpy(new_var, &fbi->var, sizeof(*new_var));
647 new_var->xoffset = var->xoffset;
648 new_var->yoffset = var->yoffset;
649 if (set_fb_var(fbi, new_var))
650 r = -EINVAL;
651 else {
652 memcpy(&fbi->var, new_var, sizeof(*new_var));
653 ctrl_change_mode(fbi);
654 }
655 }
656 omapfb_rqueue_unlock(fbdev);
657
658 return r;
659 }
660
661 /* Set mirror to vertical axis and switch to the new mode. */
662 static int omapfb_mirror(struct fb_info *fbi, int mirror)
663 {
664 struct omapfb_plane_struct *plane = fbi->par;
665 struct omapfb_device *fbdev = plane->fbdev;
666 int r = 0;
667
668 omapfb_rqueue_lock(fbdev);
669 mirror = mirror ? 1 : 0;
670 if (cpu_is_omap15xx())
671 r = -EINVAL;
672 else if (mirror != plane->info.mirror) {
673 plane->info.mirror = mirror;
674 r = ctrl_change_mode(fbi);
675 }
676 omapfb_rqueue_unlock(fbdev);
677
678 return r;
679 }
680
681 /*
682 * Check values in var, try to adjust them in case of out of bound values if
683 * possible, or return error.
684 */
685 static int omapfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
686 {
687 struct omapfb_plane_struct *plane = fbi->par;
688 struct omapfb_device *fbdev = plane->fbdev;
689 int r;
690
691 omapfb_rqueue_lock(fbdev);
692 if (fbdev->ctrl->sync != NULL)
693 fbdev->ctrl->sync();
694 r = set_fb_var(fbi, var);
695 omapfb_rqueue_unlock(fbdev);
696
697 return r;
698 }
699
700 /*
701 * Switch to a new mode. The parameters for it has been check already by
702 * omapfb_check_var.
703 */
704 static int omapfb_set_par(struct fb_info *fbi)
705 {
706 struct omapfb_plane_struct *plane = fbi->par;
707 struct omapfb_device *fbdev = plane->fbdev;
708 int r = 0;
709
710 omapfb_rqueue_lock(fbdev);
711 set_fb_fix(fbi, 0);
712 r = ctrl_change_mode(fbi);
713 omapfb_rqueue_unlock(fbdev);
714
715 return r;
716 }
717
718 int omapfb_update_window_async(struct fb_info *fbi,
719 struct omapfb_update_window *win,
720 void (*callback)(void *),
721 void *callback_data)
722 {
723 int xres, yres;
724 struct omapfb_plane_struct *plane = fbi->par;
725 struct omapfb_device *fbdev = plane->fbdev;
726 struct fb_var_screeninfo *var = &fbi->var;
727
728 switch (var->rotate) {
729 case 0:
730 case 180:
731 xres = fbdev->panel->x_res;
732 yres = fbdev->panel->y_res;
733 break;
734 case 90:
735 case 270:
736 xres = fbdev->panel->y_res;
737 yres = fbdev->panel->x_res;
738 break;
739 default:
740 return -EINVAL;
741 }
742
743 if (win->x >= xres || win->y >= yres ||
744 win->out_x > xres || win->out_y > yres)
745 return -EINVAL;
746
747 if (!fbdev->ctrl->update_window ||
748 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
749 return -ENODEV;
750
751 if (win->x + win->width > xres)
752 win->width = xres - win->x;
753 if (win->y + win->height > yres)
754 win->height = yres - win->y;
755 if (win->out_x + win->out_width > xres)
756 win->out_width = xres - win->out_x;
757 if (win->out_y + win->out_height > yres)
758 win->out_height = yres - win->out_y;
759 if (!win->width || !win->height || !win->out_width || !win->out_height)
760 return 0;
761
762 return fbdev->ctrl->update_window(fbi, win, callback, callback_data);
763 }
764 EXPORT_SYMBOL(omapfb_update_window_async);
765
766 static int omapfb_update_win(struct fb_info *fbi,
767 struct omapfb_update_window *win)
768 {
769 struct omapfb_plane_struct *plane = fbi->par;
770 int ret;
771
772 omapfb_rqueue_lock(plane->fbdev);
773 ret = omapfb_update_window_async(fbi, win, NULL, NULL);
774 omapfb_rqueue_unlock(plane->fbdev);
775
776 return ret;
777 }
778
779 static int omapfb_update_full_screen(struct fb_info *fbi)
780 {
781 struct omapfb_plane_struct *plane = fbi->par;
782 struct omapfb_device *fbdev = plane->fbdev;
783 struct omapfb_update_window win;
784 int r;
785
786 if (!fbdev->ctrl->update_window ||
787 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
788 return -ENODEV;
789
790 win.x = 0;
791 win.y = 0;
792 win.width = fbi->var.xres;
793 win.height = fbi->var.yres;
794 win.out_x = 0;
795 win.out_y = 0;
796 win.out_width = fbi->var.xres;
797 win.out_height = fbi->var.yres;
798 win.format = 0;
799
800 omapfb_rqueue_lock(fbdev);
801 r = fbdev->ctrl->update_window(fbi, &win, NULL, NULL);
802 omapfb_rqueue_unlock(fbdev);
803
804 return r;
805 }
806
807 static int omapfb_setup_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
808 {
809 struct omapfb_plane_struct *plane = fbi->par;
810 struct omapfb_device *fbdev = plane->fbdev;
811 struct lcd_panel *panel = fbdev->panel;
812 struct omapfb_plane_info old_info;
813 int r = 0;
814
815 if (pi->pos_x + pi->out_width > panel->x_res ||
816 pi->pos_y + pi->out_height > panel->y_res)
817 return -EINVAL;
818
819 omapfb_rqueue_lock(fbdev);
820 if (pi->enabled && !fbdev->mem_desc.region[plane->idx].size) {
821 /*
822 * This plane's memory was freed, can't enable it
823 * until it's reallocated.
824 */
825 r = -EINVAL;
826 goto out;
827 }
828 old_info = plane->info;
829 plane->info = *pi;
830 if (pi->enabled) {
831 r = ctrl_change_mode(fbi);
832 if (r < 0) {
833 plane->info = old_info;
834 goto out;
835 }
836 }
837 r = fbdev->ctrl->enable_plane(plane->idx, pi->enabled);
838 if (r < 0) {
839 plane->info = old_info;
840 goto out;
841 }
842 out:
843 omapfb_rqueue_unlock(fbdev);
844 return r;
845 }
846
847 static int omapfb_query_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
848 {
849 struct omapfb_plane_struct *plane = fbi->par;
850
851 *pi = plane->info;
852 return 0;
853 }
854
855 static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
856 {
857 struct omapfb_plane_struct *plane = fbi->par;
858 struct omapfb_device *fbdev = plane->fbdev;
859 struct omapfb_mem_region *rg = &fbdev->mem_desc.region[plane->idx];
860 size_t size;
861 int r = 0;
862
863 if (fbdev->ctrl->setup_mem == NULL)
864 return -ENODEV;
865 if (mi->type != OMAPFB_MEMTYPE_SDRAM)
866 return -EINVAL;
867
868 size = PAGE_ALIGN(mi->size);
869 omapfb_rqueue_lock(fbdev);
870 if (plane->info.enabled) {
871 r = -EBUSY;
872 goto out;
873 }
874 if (rg->size != size || rg->type != mi->type) {
875 struct fb_var_screeninfo *new_var = &fbdev->new_var;
876 unsigned long old_size = rg->size;
877 u8 old_type = rg->type;
878 unsigned long paddr;
879
880 rg->size = size;
881 rg->type = mi->type;
882 /*
883 * size == 0 is a special case, for which we
884 * don't check / adjust the screen parameters.
885 * This isn't a problem since the plane can't
886 * be reenabled unless its size is > 0.
887 */
888 if (old_size != size && size) {
889 if (size) {
890 memcpy(new_var, &fbi->var, sizeof(*new_var));
891 r = set_fb_var(fbi, new_var);
892 if (r < 0)
893 goto out;
894 }
895 }
896
897 if (fbdev->ctrl->sync)
898 fbdev->ctrl->sync();
899 r = fbdev->ctrl->setup_mem(plane->idx, size, mi->type, &paddr);
900 if (r < 0) {
901 /* Revert changes. */
902 rg->size = old_size;
903 rg->type = old_type;
904 goto out;
905 }
906 rg->paddr = paddr;
907
908 if (old_size != size) {
909 if (size) {
910 memcpy(&fbi->var, new_var, sizeof(fbi->var));
911 set_fb_fix(fbi, 0);
912 } else {
913 /*
914 * Set these explicitly to indicate that the
915 * plane memory is dealloce'd, the other
916 * screen parameters in var / fix are invalid.
917 */
918 mutex_lock(&fbi->mm_lock);
919 fbi->fix.smem_start = 0;
920 fbi->fix.smem_len = 0;
921 mutex_unlock(&fbi->mm_lock);
922 }
923 }
924 }
925 out:
926 omapfb_rqueue_unlock(fbdev);
927
928 return r;
929 }
930
931 static int omapfb_query_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
932 {
933 struct omapfb_plane_struct *plane = fbi->par;
934 struct omapfb_device *fbdev = plane->fbdev;
935 struct omapfb_mem_region *rg;
936
937 rg = &fbdev->mem_desc.region[plane->idx];
938 memset(mi, 0, sizeof(*mi));
939 mi->size = rg->size;
940 mi->type = rg->type;
941
942 return 0;
943 }
944
945 static int omapfb_set_color_key(struct omapfb_device *fbdev,
946 struct omapfb_color_key *ck)
947 {
948 int r;
949
950 if (!fbdev->ctrl->set_color_key)
951 return -ENODEV;
952
953 omapfb_rqueue_lock(fbdev);
954 r = fbdev->ctrl->set_color_key(ck);
955 omapfb_rqueue_unlock(fbdev);
956
957 return r;
958 }
959
960 static int omapfb_get_color_key(struct omapfb_device *fbdev,
961 struct omapfb_color_key *ck)
962 {
963 int r;
964
965 if (!fbdev->ctrl->get_color_key)
966 return -ENODEV;
967
968 omapfb_rqueue_lock(fbdev);
969 r = fbdev->ctrl->get_color_key(ck);
970 omapfb_rqueue_unlock(fbdev);
971
972 return r;
973 }
974
975 static struct blocking_notifier_head omapfb_client_list[OMAPFB_PLANE_NUM];
976 static int notifier_inited;
977
978 static void omapfb_init_notifier(void)
979 {
980 int i;
981
982 for (i = 0; i < OMAPFB_PLANE_NUM; i++)
983 BLOCKING_INIT_NOTIFIER_HEAD(&omapfb_client_list[i]);
984 }
985
986 int omapfb_register_client(struct omapfb_notifier_block *omapfb_nb,
987 omapfb_notifier_callback_t callback,
988 void *callback_data)
989 {
990 int r;
991
992 if ((unsigned)omapfb_nb->plane_idx > OMAPFB_PLANE_NUM)
993 return -EINVAL;
994
995 if (!notifier_inited) {
996 omapfb_init_notifier();
997 notifier_inited = 1;
998 }
999
1000 omapfb_nb->nb.notifier_call = (int (*)(struct notifier_block *,
1001 unsigned long, void *))callback;
1002 omapfb_nb->data = callback_data;
1003 r = blocking_notifier_chain_register(
1004 &omapfb_client_list[omapfb_nb->plane_idx],
1005 &omapfb_nb->nb);
1006 if (r)
1007 return r;
1008 if (omapfb_dev != NULL &&
1009 omapfb_dev->ctrl && omapfb_dev->ctrl->bind_client) {
1010 omapfb_dev->ctrl->bind_client(omapfb_nb);
1011 }
1012
1013 return 0;
1014 }
1015 EXPORT_SYMBOL(omapfb_register_client);
1016
1017 int omapfb_unregister_client(struct omapfb_notifier_block *omapfb_nb)
1018 {
1019 return blocking_notifier_chain_unregister(
1020 &omapfb_client_list[omapfb_nb->plane_idx], &omapfb_nb->nb);
1021 }
1022 EXPORT_SYMBOL(omapfb_unregister_client);
1023
1024 void omapfb_notify_clients(struct omapfb_device *fbdev, unsigned long event)
1025 {
1026 int i;
1027
1028 if (!notifier_inited)
1029 /* no client registered yet */
1030 return;
1031
1032 for (i = 0; i < OMAPFB_PLANE_NUM; i++)
1033 blocking_notifier_call_chain(&omapfb_client_list[i], event,
1034 fbdev->fb_info[i]);
1035 }
1036 EXPORT_SYMBOL(omapfb_notify_clients);
1037
1038 static int omapfb_set_update_mode(struct omapfb_device *fbdev,
1039 enum omapfb_update_mode mode)
1040 {
1041 int r;
1042
1043 omapfb_rqueue_lock(fbdev);
1044 r = fbdev->ctrl->set_update_mode(mode);
1045 omapfb_rqueue_unlock(fbdev);
1046
1047 return r;
1048 }
1049
1050 static enum omapfb_update_mode omapfb_get_update_mode(struct omapfb_device *fbdev)
1051 {
1052 int r;
1053
1054 omapfb_rqueue_lock(fbdev);
1055 r = fbdev->ctrl->get_update_mode();
1056 omapfb_rqueue_unlock(fbdev);
1057
1058 return r;
1059 }
1060
1061 static void omapfb_get_caps(struct omapfb_device *fbdev, int plane,
1062 struct omapfb_caps *caps)
1063 {
1064 memset(caps, 0, sizeof(*caps));
1065 fbdev->ctrl->get_caps(plane, caps);
1066 caps->ctrl |= fbdev->panel->get_caps(fbdev->panel);
1067 }
1068
1069 /* For lcd testing */
1070 void omapfb_write_first_pixel(struct omapfb_device *fbdev, u16 pixval)
1071 {
1072 omapfb_rqueue_lock(fbdev);
1073 *(u16 *)fbdev->mem_desc.region[0].vaddr = pixval;
1074 if (fbdev->ctrl->get_update_mode() == OMAPFB_MANUAL_UPDATE) {
1075 struct omapfb_update_window win;
1076
1077 memset(&win, 0, sizeof(win));
1078 win.width = 2;
1079 win.height = 2;
1080 win.out_width = 2;
1081 win.out_height = 2;
1082 fbdev->ctrl->update_window(fbdev->fb_info[0], &win, NULL, NULL);
1083 }
1084 omapfb_rqueue_unlock(fbdev);
1085 }
1086 EXPORT_SYMBOL(omapfb_write_first_pixel);
1087
1088 /*
1089 * Ioctl interface. Part of the kernel mode frame buffer API is duplicated
1090 * here to be accessible by user mode code.
1091 */
1092 static int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd,
1093 unsigned long arg)
1094 {
1095 struct omapfb_plane_struct *plane = fbi->par;
1096 struct omapfb_device *fbdev = plane->fbdev;
1097 struct fb_ops *ops = fbi->fbops;
1098 union {
1099 struct omapfb_update_window update_window;
1100 struct omapfb_plane_info plane_info;
1101 struct omapfb_mem_info mem_info;
1102 struct omapfb_color_key color_key;
1103 enum omapfb_update_mode update_mode;
1104 struct omapfb_caps caps;
1105 unsigned int mirror;
1106 int plane_out;
1107 int enable_plane;
1108 } p;
1109 int r = 0;
1110
1111 BUG_ON(!ops);
1112 switch (cmd) {
1113 case OMAPFB_MIRROR:
1114 if (get_user(p.mirror, (int __user *)arg))
1115 r = -EFAULT;
1116 else
1117 omapfb_mirror(fbi, p.mirror);
1118 break;
1119 case OMAPFB_SYNC_GFX:
1120 omapfb_sync(fbi);
1121 break;
1122 case OMAPFB_VSYNC:
1123 break;
1124 case OMAPFB_SET_UPDATE_MODE:
1125 if (get_user(p.update_mode, (int __user *)arg))
1126 r = -EFAULT;
1127 else
1128 r = omapfb_set_update_mode(fbdev, p.update_mode);
1129 break;
1130 case OMAPFB_GET_UPDATE_MODE:
1131 p.update_mode = omapfb_get_update_mode(fbdev);
1132 if (put_user(p.update_mode,
1133 (enum omapfb_update_mode __user *)arg))
1134 r = -EFAULT;
1135 break;
1136 case OMAPFB_UPDATE_WINDOW_OLD:
1137 if (copy_from_user(&p.update_window, (void __user *)arg,
1138 sizeof(struct omapfb_update_window_old)))
1139 r = -EFAULT;
1140 else {
1141 struct omapfb_update_window *u = &p.update_window;
1142 u->out_x = u->x;
1143 u->out_y = u->y;
1144 u->out_width = u->width;
1145 u->out_height = u->height;
1146 memset(u->reserved, 0, sizeof(u->reserved));
1147 r = omapfb_update_win(fbi, u);
1148 }
1149 break;
1150 case OMAPFB_UPDATE_WINDOW:
1151 if (copy_from_user(&p.update_window, (void __user *)arg,
1152 sizeof(p.update_window)))
1153 r = -EFAULT;
1154 else
1155 r = omapfb_update_win(fbi, &p.update_window);
1156 break;
1157 case OMAPFB_SETUP_PLANE:
1158 if (copy_from_user(&p.plane_info, (void __user *)arg,
1159 sizeof(p.plane_info)))
1160 r = -EFAULT;
1161 else
1162 r = omapfb_setup_plane(fbi, &p.plane_info);
1163 break;
1164 case OMAPFB_QUERY_PLANE:
1165 if ((r = omapfb_query_plane(fbi, &p.plane_info)) < 0)
1166 break;
1167 if (copy_to_user((void __user *)arg, &p.plane_info,
1168 sizeof(p.plane_info)))
1169 r = -EFAULT;
1170 break;
1171 case OMAPFB_SETUP_MEM:
1172 if (copy_from_user(&p.mem_info, (void __user *)arg,
1173 sizeof(p.mem_info)))
1174 r = -EFAULT;
1175 else
1176 r = omapfb_setup_mem(fbi, &p.mem_info);
1177 break;
1178 case OMAPFB_QUERY_MEM:
1179 if ((r = omapfb_query_mem(fbi, &p.mem_info)) < 0)
1180 break;
1181 if (copy_to_user((void __user *)arg, &p.mem_info,
1182 sizeof(p.mem_info)))
1183 r = -EFAULT;
1184 break;
1185 case OMAPFB_SET_COLOR_KEY:
1186 if (copy_from_user(&p.color_key, (void __user *)arg,
1187 sizeof(p.color_key)))
1188 r = -EFAULT;
1189 else
1190 r = omapfb_set_color_key(fbdev, &p.color_key);
1191 break;
1192 case OMAPFB_GET_COLOR_KEY:
1193 if ((r = omapfb_get_color_key(fbdev, &p.color_key)) < 0)
1194 break;
1195 if (copy_to_user((void __user *)arg, &p.color_key,
1196 sizeof(p.color_key)))
1197 r = -EFAULT;
1198 break;
1199 case OMAPFB_GET_CAPS:
1200 omapfb_get_caps(fbdev, plane->idx, &p.caps);
1201 if (copy_to_user((void __user *)arg, &p.caps, sizeof(p.caps)))
1202 r = -EFAULT;
1203 break;
1204 case OMAPFB_LCD_TEST:
1205 {
1206 int test_num;
1207
1208 if (get_user(test_num, (int __user *)arg)) {
1209 r = -EFAULT;
1210 break;
1211 }
1212 if (!fbdev->panel->run_test) {
1213 r = -EINVAL;
1214 break;
1215 }
1216 r = fbdev->panel->run_test(fbdev->panel, test_num);
1217 break;
1218 }
1219 case OMAPFB_CTRL_TEST:
1220 {
1221 int test_num;
1222
1223 if (get_user(test_num, (int __user *)arg)) {
1224 r = -EFAULT;
1225 break;
1226 }
1227 if (!fbdev->ctrl->run_test) {
1228 r = -EINVAL;
1229 break;
1230 }
1231 r = fbdev->ctrl->run_test(test_num);
1232 break;
1233 }
1234 default:
1235 r = -EINVAL;
1236 }
1237
1238 return r;
1239 }
1240
1241 static int omapfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
1242 {
1243 struct omapfb_plane_struct *plane = info->par;
1244 struct omapfb_device *fbdev = plane->fbdev;
1245 int r;
1246
1247 omapfb_rqueue_lock(fbdev);
1248 r = fbdev->ctrl->mmap(info, vma);
1249 omapfb_rqueue_unlock(fbdev);
1250
1251 return r;
1252 }
1253
1254 /*
1255 * Callback table for the frame buffer framework. Some of these pointers
1256 * will be changed according to the current setting of fb_info->accel_flags.
1257 */
1258 static struct fb_ops omapfb_ops = {
1259 .owner = THIS_MODULE,
1260 .fb_open = omapfb_open,
1261 .fb_release = omapfb_release,
1262 .fb_setcolreg = omapfb_setcolreg,
1263 .fb_setcmap = omapfb_setcmap,
1264 .fb_fillrect = cfb_fillrect,
1265 .fb_copyarea = cfb_copyarea,
1266 .fb_imageblit = cfb_imageblit,
1267 .fb_blank = omapfb_blank,
1268 .fb_ioctl = omapfb_ioctl,
1269 .fb_check_var = omapfb_check_var,
1270 .fb_set_par = omapfb_set_par,
1271 .fb_rotate = omapfb_rotate,
1272 .fb_pan_display = omapfb_pan_display,
1273 };
1274
1275 /*
1276 * ---------------------------------------------------------------------------
1277 * Sysfs interface
1278 * ---------------------------------------------------------------------------
1279 */
1280 /* omapfbX sysfs entries */
1281 static ssize_t omapfb_show_caps_num(struct device *dev,
1282 struct device_attribute *attr, char *buf)
1283 {
1284 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1285 int plane;
1286 size_t size;
1287 struct omapfb_caps caps;
1288
1289 plane = 0;
1290 size = 0;
1291 while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1292 omapfb_get_caps(fbdev, plane, &caps);
1293 size += snprintf(&buf[size], PAGE_SIZE - size,
1294 "plane#%d %#010x %#010x %#010x\n",
1295 plane, caps.ctrl, caps.plane_color, caps.wnd_color);
1296 plane++;
1297 }
1298 return size;
1299 }
1300
1301 static ssize_t omapfb_show_caps_text(struct device *dev,
1302 struct device_attribute *attr, char *buf)
1303 {
1304 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1305 int i;
1306 struct omapfb_caps caps;
1307 int plane;
1308 size_t size;
1309
1310 plane = 0;
1311 size = 0;
1312 while (size < PAGE_SIZE && plane < OMAPFB_PLANE_NUM) {
1313 omapfb_get_caps(fbdev, plane, &caps);
1314 size += snprintf(&buf[size], PAGE_SIZE - size,
1315 "plane#%d:\n", plane);
1316 for (i = 0; i < ARRAY_SIZE(ctrl_caps) &&
1317 size < PAGE_SIZE; i++) {
1318 if (ctrl_caps[i].flag & caps.ctrl)
1319 size += snprintf(&buf[size], PAGE_SIZE - size,
1320 " %s\n", ctrl_caps[i].name);
1321 }
1322 size += snprintf(&buf[size], PAGE_SIZE - size,
1323 " plane colors:\n");
1324 for (i = 0; i < ARRAY_SIZE(color_caps) &&
1325 size < PAGE_SIZE; i++) {
1326 if (color_caps[i].flag & caps.plane_color)
1327 size += snprintf(&buf[size], PAGE_SIZE - size,
1328 " %s\n", color_caps[i].name);
1329 }
1330 size += snprintf(&buf[size], PAGE_SIZE - size,
1331 " window colors:\n");
1332 for (i = 0; i < ARRAY_SIZE(color_caps) &&
1333 size < PAGE_SIZE; i++) {
1334 if (color_caps[i].flag & caps.wnd_color)
1335 size += snprintf(&buf[size], PAGE_SIZE - size,
1336 " %s\n", color_caps[i].name);
1337 }
1338
1339 plane++;
1340 }
1341 return size;
1342 }
1343
1344 static DEVICE_ATTR(caps_num, 0444, omapfb_show_caps_num, NULL);
1345 static DEVICE_ATTR(caps_text, 0444, omapfb_show_caps_text, NULL);
1346
1347 /* panel sysfs entries */
1348 static ssize_t omapfb_show_panel_name(struct device *dev,
1349 struct device_attribute *attr, char *buf)
1350 {
1351 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1352
1353 return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->panel->name);
1354 }
1355
1356 static ssize_t omapfb_show_bklight_level(struct device *dev,
1357 struct device_attribute *attr,
1358 char *buf)
1359 {
1360 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1361 int r;
1362
1363 if (fbdev->panel->get_bklight_level) {
1364 r = snprintf(buf, PAGE_SIZE, "%d\n",
1365 fbdev->panel->get_bklight_level(fbdev->panel));
1366 } else
1367 r = -ENODEV;
1368 return r;
1369 }
1370
1371 static ssize_t omapfb_store_bklight_level(struct device *dev,
1372 struct device_attribute *attr,
1373 const char *buf, size_t size)
1374 {
1375 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1376 int r;
1377
1378 if (fbdev->panel->set_bklight_level) {
1379 unsigned int level;
1380
1381 if (sscanf(buf, "%10d", &level) == 1) {
1382 r = fbdev->panel->set_bklight_level(fbdev->panel,
1383 level);
1384 } else
1385 r = -EINVAL;
1386 } else
1387 r = -ENODEV;
1388 return r ? r : size;
1389 }
1390
1391 static ssize_t omapfb_show_bklight_max(struct device *dev,
1392 struct device_attribute *attr, char *buf)
1393 {
1394 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1395 int r;
1396
1397 if (fbdev->panel->get_bklight_level) {
1398 r = snprintf(buf, PAGE_SIZE, "%d\n",
1399 fbdev->panel->get_bklight_max(fbdev->panel));
1400 } else
1401 r = -ENODEV;
1402 return r;
1403 }
1404
1405 static struct device_attribute dev_attr_panel_name =
1406 __ATTR(name, 0444, omapfb_show_panel_name, NULL);
1407 static DEVICE_ATTR(backlight_level, 0664,
1408 omapfb_show_bklight_level, omapfb_store_bklight_level);
1409 static DEVICE_ATTR(backlight_max, 0444, omapfb_show_bklight_max, NULL);
1410
1411 static struct attribute *panel_attrs[] = {
1412 &dev_attr_panel_name.attr,
1413 &dev_attr_backlight_level.attr,
1414 &dev_attr_backlight_max.attr,
1415 NULL,
1416 };
1417
1418 static struct attribute_group panel_attr_grp = {
1419 .name = "panel",
1420 .attrs = panel_attrs,
1421 };
1422
1423 /* ctrl sysfs entries */
1424 static ssize_t omapfb_show_ctrl_name(struct device *dev,
1425 struct device_attribute *attr, char *buf)
1426 {
1427 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1428
1429 return snprintf(buf, PAGE_SIZE, "%s\n", fbdev->ctrl->name);
1430 }
1431
1432 static struct device_attribute dev_attr_ctrl_name =
1433 __ATTR(name, 0444, omapfb_show_ctrl_name, NULL);
1434
1435 static struct attribute *ctrl_attrs[] = {
1436 &dev_attr_ctrl_name.attr,
1437 NULL,
1438 };
1439
1440 static struct attribute_group ctrl_attr_grp = {
1441 .name = "ctrl",
1442 .attrs = ctrl_attrs,
1443 };
1444
1445 static int omapfb_register_sysfs(struct omapfb_device *fbdev)
1446 {
1447 int r;
1448
1449 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_num)))
1450 goto fail0;
1451
1452 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_text)))
1453 goto fail1;
1454
1455 if ((r = sysfs_create_group(&fbdev->dev->kobj, &panel_attr_grp)))
1456 goto fail2;
1457
1458 if ((r = sysfs_create_group(&fbdev->dev->kobj, &ctrl_attr_grp)))
1459 goto fail3;
1460
1461 return 0;
1462 fail3:
1463 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1464 fail2:
1465 device_remove_file(fbdev->dev, &dev_attr_caps_text);
1466 fail1:
1467 device_remove_file(fbdev->dev, &dev_attr_caps_num);
1468 fail0:
1469 dev_err(fbdev->dev, "unable to register sysfs interface\n");
1470 return r;
1471 }
1472
1473 static void omapfb_unregister_sysfs(struct omapfb_device *fbdev)
1474 {
1475 sysfs_remove_group(&fbdev->dev->kobj, &ctrl_attr_grp);
1476 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1477 device_remove_file(fbdev->dev, &dev_attr_caps_num);
1478 device_remove_file(fbdev->dev, &dev_attr_caps_text);
1479 }
1480
1481 /*
1482 * ---------------------------------------------------------------------------
1483 * LDM callbacks
1484 * ---------------------------------------------------------------------------
1485 */
1486 /* Initialize system fb_info object and set the default video mode.
1487 * The frame buffer memory already allocated by lcddma_init
1488 */
1489 static int fbinfo_init(struct omapfb_device *fbdev, struct fb_info *info)
1490 {
1491 struct fb_var_screeninfo *var = &info->var;
1492 struct fb_fix_screeninfo *fix = &info->fix;
1493 int r = 0;
1494
1495 info->fbops = &omapfb_ops;
1496 info->flags = FBINFO_FLAG_DEFAULT;
1497
1498 strncpy(fix->id, MODULE_NAME, sizeof(fix->id));
1499
1500 info->pseudo_palette = fbdev->pseudo_palette;
1501
1502 var->accel_flags = def_accel ? FB_ACCELF_TEXT : 0;
1503 var->xres = def_vxres;
1504 var->yres = def_vyres;
1505 var->xres_virtual = def_vxres;
1506 var->yres_virtual = def_vyres;
1507 var->rotate = def_rotate;
1508 var->bits_per_pixel = fbdev->panel->bpp;
1509
1510 set_fb_var(info, var);
1511 set_fb_fix(info, 1);
1512
1513 r = fb_alloc_cmap(&info->cmap, 16, 0);
1514 if (r != 0)
1515 dev_err(fbdev->dev, "unable to allocate color map memory\n");
1516
1517 return r;
1518 }
1519
1520 /* Release the fb_info object */
1521 static void fbinfo_cleanup(struct omapfb_device *fbdev, struct fb_info *fbi)
1522 {
1523 fb_dealloc_cmap(&fbi->cmap);
1524 }
1525
1526 static void planes_cleanup(struct omapfb_device *fbdev)
1527 {
1528 int i;
1529
1530 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1531 if (fbdev->fb_info[i] == NULL)
1532 break;
1533 fbinfo_cleanup(fbdev, fbdev->fb_info[i]);
1534 framebuffer_release(fbdev->fb_info[i]);
1535 }
1536 }
1537
1538 static int planes_init(struct omapfb_device *fbdev)
1539 {
1540 struct fb_info *fbi;
1541 int i;
1542 int r;
1543
1544 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1545 struct omapfb_plane_struct *plane;
1546 fbi = framebuffer_alloc(sizeof(struct omapfb_plane_struct),
1547 fbdev->dev);
1548 if (fbi == NULL) {
1549 dev_err(fbdev->dev,
1550 "unable to allocate memory for plane info\n");
1551 planes_cleanup(fbdev);
1552 return -ENOMEM;
1553 }
1554 plane = fbi->par;
1555 plane->idx = i;
1556 plane->fbdev = fbdev;
1557 plane->info.mirror = def_mirror;
1558 fbdev->fb_info[i] = fbi;
1559
1560 if ((r = fbinfo_init(fbdev, fbi)) < 0) {
1561 framebuffer_release(fbi);
1562 planes_cleanup(fbdev);
1563 return r;
1564 }
1565 plane->info.out_width = fbi->var.xres;
1566 plane->info.out_height = fbi->var.yres;
1567 }
1568 return 0;
1569 }
1570
1571 /*
1572 * Free driver resources. Can be called to rollback an aborted initialization
1573 * sequence.
1574 */
1575 static void omapfb_free_resources(struct omapfb_device *fbdev, int state)
1576 {
1577 int i;
1578
1579 switch (state) {
1580 case OMAPFB_ACTIVE:
1581 for (i = 0; i < fbdev->mem_desc.region_cnt; i++)
1582 unregister_framebuffer(fbdev->fb_info[i]);
1583 case 7:
1584 omapfb_unregister_sysfs(fbdev);
1585 case 6:
1586 fbdev->panel->disable(fbdev->panel);
1587 case 5:
1588 omapfb_set_update_mode(fbdev, OMAPFB_UPDATE_DISABLED);
1589 case 4:
1590 planes_cleanup(fbdev);
1591 case 3:
1592 ctrl_cleanup(fbdev);
1593 case 2:
1594 fbdev->panel->cleanup(fbdev->panel);
1595 case 1:
1596 dev_set_drvdata(fbdev->dev, NULL);
1597 kfree(fbdev);
1598 case 0:
1599 /* nothing to free */
1600 break;
1601 default:
1602 BUG();
1603 }
1604 }
1605
1606 static int omapfb_find_ctrl(struct omapfb_device *fbdev)
1607 {
1608 struct omapfb_platform_data *conf;
1609 char name[17];
1610 int i;
1611
1612 conf = fbdev->dev->platform_data;
1613
1614 fbdev->ctrl = NULL;
1615
1616 strncpy(name, conf->lcd.ctrl_name, sizeof(name) - 1);
1617 name[sizeof(name) - 1] = '\0';
1618
1619 if (strcmp(name, "internal") == 0) {
1620 fbdev->ctrl = fbdev->int_ctrl;
1621 return 0;
1622 }
1623
1624 for (i = 0; i < ARRAY_SIZE(ctrls); i++) {
1625 dev_dbg(fbdev->dev, "ctrl %s\n", ctrls[i]->name);
1626 if (strcmp(ctrls[i]->name, name) == 0) {
1627 fbdev->ctrl = ctrls[i];
1628 break;
1629 }
1630 }
1631
1632 if (fbdev->ctrl == NULL) {
1633 dev_dbg(fbdev->dev, "ctrl %s not supported\n", name);
1634 return -1;
1635 }
1636
1637 return 0;
1638 }
1639
1640 static void check_required_callbacks(struct omapfb_device *fbdev)
1641 {
1642 #define _C(x) (fbdev->ctrl->x != NULL)
1643 #define _P(x) (fbdev->panel->x != NULL)
1644 BUG_ON(fbdev->ctrl == NULL || fbdev->panel == NULL);
1645 BUG_ON(!(_C(init) && _C(cleanup) && _C(get_caps) &&
1646 _C(set_update_mode) && _C(setup_plane) && _C(enable_plane) &&
1647 _P(init) && _P(cleanup) && _P(enable) && _P(disable) &&
1648 _P(get_caps)));
1649 #undef _P
1650 #undef _C
1651 }
1652
1653 /*
1654 * Called by LDM binding to probe and attach a new device.
1655 * Initialization sequence:
1656 * 1. allocate system omapfb_device structure
1657 * 2. select controller type according to platform configuration
1658 * init LCD panel
1659 * 3. init LCD controller and LCD DMA
1660 * 4. init system fb_info structure for all planes
1661 * 5. setup video mode for first plane and enable it
1662 * 6. enable LCD panel
1663 * 7. register sysfs attributes
1664 * OMAPFB_ACTIVE: register system fb_info structure for all planes
1665 */
1666 static int omapfb_do_probe(struct platform_device *pdev,
1667 struct lcd_panel *panel)
1668 {
1669 struct omapfb_device *fbdev = NULL;
1670 int init_state;
1671 unsigned long phz, hhz, vhz;
1672 unsigned long vram;
1673 int i;
1674 int r = 0;
1675
1676 init_state = 0;
1677
1678 if (pdev->num_resources != 0) {
1679 dev_err(&pdev->dev, "probed for an unknown device\n");
1680 r = -ENODEV;
1681 goto cleanup;
1682 }
1683
1684 if (pdev->dev.platform_data == NULL) {
1685 dev_err(&pdev->dev, "missing platform data\n");
1686 r = -ENOENT;
1687 goto cleanup;
1688 }
1689
1690 fbdev = kzalloc(sizeof(struct omapfb_device), GFP_KERNEL);
1691 if (fbdev == NULL) {
1692 dev_err(&pdev->dev,
1693 "unable to allocate memory for device info\n");
1694 r = -ENOMEM;
1695 goto cleanup;
1696 }
1697 init_state++;
1698
1699 fbdev->dev = &pdev->dev;
1700 fbdev->panel = panel;
1701 fbdev->dssdev = &omapdss_device;
1702 platform_set_drvdata(pdev, fbdev);
1703
1704 mutex_init(&fbdev->rqueue_mutex);
1705
1706 fbdev->int_ctrl = &omap1_int_ctrl;
1707 #ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
1708 fbdev->ext_if = &omap1_ext_if;
1709 #endif
1710 if (omapfb_find_ctrl(fbdev) < 0) {
1711 dev_err(fbdev->dev,
1712 "LCD controller not found, board not supported\n");
1713 r = -ENODEV;
1714 goto cleanup;
1715 }
1716
1717 r = fbdev->panel->init(fbdev->panel, fbdev);
1718 if (r)
1719 goto cleanup;
1720
1721 pr_info("omapfb: configured for panel %s\n", fbdev->panel->name);
1722
1723 def_vxres = def_vxres ? def_vxres : fbdev->panel->x_res;
1724 def_vyres = def_vyres ? def_vyres : fbdev->panel->y_res;
1725
1726 init_state++;
1727
1728 r = ctrl_init(fbdev);
1729 if (r)
1730 goto cleanup;
1731 if (fbdev->ctrl->mmap != NULL)
1732 omapfb_ops.fb_mmap = omapfb_mmap;
1733 init_state++;
1734
1735 check_required_callbacks(fbdev);
1736
1737 r = planes_init(fbdev);
1738 if (r)
1739 goto cleanup;
1740 init_state++;
1741
1742 #ifdef CONFIG_FB_OMAP_DMA_TUNE
1743 /* Set DMA priority for EMIFF access to highest */
1744 omap_set_dma_priority(0, OMAP_DMA_PORT_EMIFF, 15);
1745 #endif
1746
1747 r = ctrl_change_mode(fbdev->fb_info[0]);
1748 if (r) {
1749 dev_err(fbdev->dev, "mode setting failed\n");
1750 goto cleanup;
1751 }
1752
1753 /* GFX plane is enabled by default */
1754 r = fbdev->ctrl->enable_plane(OMAPFB_PLANE_GFX, 1);
1755 if (r)
1756 goto cleanup;
1757
1758 omapfb_set_update_mode(fbdev, manual_update ?
1759 OMAPFB_MANUAL_UPDATE : OMAPFB_AUTO_UPDATE);
1760 init_state++;
1761
1762 r = fbdev->panel->enable(fbdev->panel);
1763 if (r)
1764 goto cleanup;
1765 init_state++;
1766
1767 r = omapfb_register_sysfs(fbdev);
1768 if (r)
1769 goto cleanup;
1770 init_state++;
1771
1772 vram = 0;
1773 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1774 r = register_framebuffer(fbdev->fb_info[i]);
1775 if (r != 0) {
1776 dev_err(fbdev->dev,
1777 "registering framebuffer %d failed\n", i);
1778 goto cleanup;
1779 }
1780 vram += fbdev->mem_desc.region[i].size;
1781 }
1782
1783 fbdev->state = OMAPFB_ACTIVE;
1784
1785 panel = fbdev->panel;
1786 phz = panel->pixel_clock * 1000;
1787 hhz = phz * 10 / (panel->hfp + panel->x_res + panel->hbp + panel->hsw);
1788 vhz = hhz / (panel->vfp + panel->y_res + panel->vbp + panel->vsw);
1789
1790 omapfb_dev = fbdev;
1791
1792 pr_info("omapfb: Framebuffer initialized. Total vram %lu planes %d\n",
1793 vram, fbdev->mem_desc.region_cnt);
1794 pr_info("omapfb: Pixclock %lu kHz hfreq %lu.%lu kHz "
1795 "vfreq %lu.%lu Hz\n",
1796 phz / 1000, hhz / 10000, hhz % 10, vhz / 10, vhz % 10);
1797
1798 return 0;
1799
1800 cleanup:
1801 omapfb_free_resources(fbdev, init_state);
1802
1803 return r;
1804 }
1805
1806 static int omapfb_probe(struct platform_device *pdev)
1807 {
1808 int r;
1809
1810 BUG_ON(fbdev_pdev != NULL);
1811
1812 r = platform_device_register(&omapdss_device);
1813 if (r) {
1814 dev_err(&pdev->dev, "can't register omapdss device\n");
1815 return r;
1816 }
1817
1818 /* Delay actual initialization until the LCD is registered */
1819 fbdev_pdev = pdev;
1820 if (fbdev_panel != NULL)
1821 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1822 return 0;
1823 }
1824
1825 void omapfb_register_panel(struct lcd_panel *panel)
1826 {
1827 BUG_ON(fbdev_panel != NULL);
1828
1829 fbdev_panel = panel;
1830 if (fbdev_pdev != NULL)
1831 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1832 }
1833
1834 /* Called when the device is being detached from the driver */
1835 static int omapfb_remove(struct platform_device *pdev)
1836 {
1837 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1838 enum omapfb_state saved_state = fbdev->state;
1839
1840 /* FIXME: wait till completion of pending events */
1841
1842 fbdev->state = OMAPFB_DISABLED;
1843 omapfb_free_resources(fbdev, saved_state);
1844
1845 platform_device_unregister(&omapdss_device);
1846 fbdev->dssdev = NULL;
1847
1848 return 0;
1849 }
1850
1851 /* PM suspend */
1852 static int omapfb_suspend(struct platform_device *pdev, pm_message_t mesg)
1853 {
1854 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1855
1856 if (fbdev != NULL)
1857 omapfb_blank(FB_BLANK_POWERDOWN, fbdev->fb_info[0]);
1858 return 0;
1859 }
1860
1861 /* PM resume */
1862 static int omapfb_resume(struct platform_device *pdev)
1863 {
1864 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1865
1866 if (fbdev != NULL)
1867 omapfb_blank(FB_BLANK_UNBLANK, fbdev->fb_info[0]);
1868 return 0;
1869 }
1870
1871 static struct platform_driver omapfb_driver = {
1872 .probe = omapfb_probe,
1873 .remove = omapfb_remove,
1874 .suspend = omapfb_suspend,
1875 .resume = omapfb_resume,
1876 .driver = {
1877 .name = MODULE_NAME,
1878 .owner = THIS_MODULE,
1879 },
1880 };
1881
1882 #ifndef MODULE
1883
1884 /* Process kernel command line parameters */
1885 static int __init omapfb_setup(char *options)
1886 {
1887 char *this_opt = NULL;
1888 int r = 0;
1889
1890 pr_debug("omapfb: options %s\n", options);
1891
1892 if (!options || !*options)
1893 return 0;
1894
1895 while (!r && (this_opt = strsep(&options, ",")) != NULL) {
1896 if (!strncmp(this_opt, "accel", 5))
1897 def_accel = 1;
1898 else if (!strncmp(this_opt, "vram:", 5)) {
1899 char *suffix;
1900 unsigned long vram;
1901 vram = (simple_strtoul(this_opt + 5, &suffix, 0));
1902 switch (suffix[0]) {
1903 case '\0':
1904 break;
1905 case 'm':
1906 case 'M':
1907 vram *= 1024;
1908 /* Fall through */
1909 case 'k':
1910 case 'K':
1911 vram *= 1024;
1912 break;
1913 default:
1914 pr_debug("omapfb: invalid vram suffix %c\n",
1915 suffix[0]);
1916 r = -1;
1917 }
1918 def_vram[def_vram_cnt++] = vram;
1919 }
1920 else if (!strncmp(this_opt, "vxres:", 6))
1921 def_vxres = simple_strtoul(this_opt + 6, NULL, 0);
1922 else if (!strncmp(this_opt, "vyres:", 6))
1923 def_vyres = simple_strtoul(this_opt + 6, NULL, 0);
1924 else if (!strncmp(this_opt, "rotate:", 7))
1925 def_rotate = (simple_strtoul(this_opt + 7, NULL, 0));
1926 else if (!strncmp(this_opt, "mirror:", 7))
1927 def_mirror = (simple_strtoul(this_opt + 7, NULL, 0));
1928 else if (!strncmp(this_opt, "manual_update", 13))
1929 manual_update = 1;
1930 else {
1931 pr_debug("omapfb: invalid option\n");
1932 r = -1;
1933 }
1934 }
1935
1936 return r;
1937 }
1938
1939 #endif
1940
1941 /* Register both the driver and the device */
1942 static int __init omapfb_init(void)
1943 {
1944 #ifndef MODULE
1945 char *option;
1946
1947 if (fb_get_options("omapfb", &option))
1948 return -ENODEV;
1949 omapfb_setup(option);
1950 #endif
1951 /* Register the driver with LDM */
1952 if (platform_driver_register(&omapfb_driver)) {
1953 pr_debug("failed to register omapfb driver\n");
1954 return -ENODEV;
1955 }
1956
1957 return 0;
1958 }
1959
1960 static void __exit omapfb_cleanup(void)
1961 {
1962 platform_driver_unregister(&omapfb_driver);
1963 }
1964
1965 module_param_named(accel, def_accel, uint, 0664);
1966 module_param_array_named(vram, def_vram, ulong, &def_vram_cnt, 0664);
1967 module_param_named(vxres, def_vxres, long, 0664);
1968 module_param_named(vyres, def_vyres, long, 0664);
1969 module_param_named(rotate, def_rotate, uint, 0664);
1970 module_param_named(mirror, def_mirror, uint, 0664);
1971 module_param_named(manual_update, manual_update, bool, 0664);
1972
1973 module_init(omapfb_init);
1974 module_exit(omapfb_cleanup);
1975
1976 MODULE_DESCRIPTION("TI OMAP framebuffer driver");
1977 MODULE_AUTHOR("Imre Deak <imre.deak@nokia.com>");
1978 MODULE_LICENSE("GPL");
Linux with added FPC-III support