OMAPFB: prevent buffer underflow in omapfb_parse_vram_param()
[sfrench/cifs-2.6.git] / drivers / video / fbdev / omap2 / omapfb / omapfb-main.c
1 /*
2  * linux/drivers/video/omap2/omapfb-main.c
3  *
4  * Copyright (C) 2008 Nokia Corporation
5  * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
6  *
7  * Some code and ideas taken from drivers/video/omap/ driver
8  * by Imre Deak.
9  *
10  * This program is free software; you can redistribute it and/or modify it
11  * under the terms of the GNU General Public License version 2 as published by
12  * the Free Software Foundation.
13  *
14  * This program is distributed in the hope that it will be useful, but WITHOUT
15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
17  * more details.
18  *
19  * You should have received a copy of the GNU General Public License along with
20  * this program.  If not, see <http://www.gnu.org/licenses/>.
21  */
22
23 #include <linux/module.h>
24 #include <linux/delay.h>
25 #include <linux/slab.h>
26 #include <linux/fb.h>
27 #include <linux/dma-mapping.h>
28 #include <linux/vmalloc.h>
29 #include <linux/device.h>
30 #include <linux/platform_device.h>
31 #include <linux/omapfb.h>
32
33 #include <video/omapfb_dss.h>
34 #include <video/omapvrfb.h>
35
36 #include "omapfb.h"
37
38 #define MODULE_NAME     "omapfb"
39
40 #define OMAPFB_PLANE_XRES_MIN           8
41 #define OMAPFB_PLANE_YRES_MIN           8
42
43 static char *def_mode;
44 static char *def_vram;
45 static bool def_vrfb;
46 static int def_rotate;
47 static bool def_mirror;
48 static bool auto_update;
49 static unsigned int auto_update_freq;
50 module_param(auto_update, bool, 0);
51 module_param(auto_update_freq, uint, 0644);
52
53 #ifdef DEBUG
54 bool omapfb_debug;
55 module_param_named(debug, omapfb_debug, bool, 0644);
56 static bool omapfb_test_pattern;
57 module_param_named(test, omapfb_test_pattern, bool, 0644);
58 #endif
59
60 static int omapfb_fb_init(struct omapfb2_device *fbdev, struct fb_info *fbi);
61 static int omapfb_get_recommended_bpp(struct omapfb2_device *fbdev,
62                 struct omap_dss_device *dssdev);
63
64 #ifdef DEBUG
65 static void draw_pixel(struct fb_info *fbi, int x, int y, unsigned color)
66 {
67         struct fb_var_screeninfo *var = &fbi->var;
68         struct fb_fix_screeninfo *fix = &fbi->fix;
69         void __iomem *addr = fbi->screen_base;
70         const unsigned bytespp = var->bits_per_pixel >> 3;
71         const unsigned line_len = fix->line_length / bytespp;
72
73         int r = (color >> 16) & 0xff;
74         int g = (color >> 8) & 0xff;
75         int b = (color >> 0) & 0xff;
76
77         if (var->bits_per_pixel == 16) {
78                 u16 __iomem *p = (u16 __iomem *)addr;
79                 p += y * line_len + x;
80
81                 r = r * 32 / 256;
82                 g = g * 64 / 256;
83                 b = b * 32 / 256;
84
85                 __raw_writew((r << 11) | (g << 5) | (b << 0), p);
86         } else if (var->bits_per_pixel == 24) {
87                 u8 __iomem *p = (u8 __iomem *)addr;
88                 p += (y * line_len + x) * 3;
89
90                 __raw_writeb(b, p + 0);
91                 __raw_writeb(g, p + 1);
92                 __raw_writeb(r, p + 2);
93         } else if (var->bits_per_pixel == 32) {
94                 u32 __iomem *p = (u32 __iomem *)addr;
95                 p += y * line_len + x;
96                 __raw_writel(color, p);
97         }
98 }
99
100 static void fill_fb(struct fb_info *fbi)
101 {
102         struct fb_var_screeninfo *var = &fbi->var;
103         const short w = var->xres_virtual;
104         const short h = var->yres_virtual;
105         void __iomem *addr = fbi->screen_base;
106         int y, x;
107
108         if (!addr)
109                 return;
110
111         DBG("fill_fb %dx%d, line_len %d bytes\n", w, h, fbi->fix.line_length);
112
113         for (y = 0; y < h; y++) {
114                 for (x = 0; x < w; x++) {
115                         if (x < 20 && y < 20)
116                                 draw_pixel(fbi, x, y, 0xffffff);
117                         else if (x < 20 && (y > 20 && y < h - 20))
118                                 draw_pixel(fbi, x, y, 0xff);
119                         else if (y < 20 && (x > 20 && x < w - 20))
120                                 draw_pixel(fbi, x, y, 0xff00);
121                         else if (x > w - 20 && (y > 20 && y < h - 20))
122                                 draw_pixel(fbi, x, y, 0xff0000);
123                         else if (y > h - 20 && (x > 20 && x < w - 20))
124                                 draw_pixel(fbi, x, y, 0xffff00);
125                         else if (x == 20 || x == w - 20 ||
126                                         y == 20 || y == h - 20)
127                                 draw_pixel(fbi, x, y, 0xffffff);
128                         else if (x == y || w - x == h - y)
129                                 draw_pixel(fbi, x, y, 0xff00ff);
130                         else if (w - x == y || x == h - y)
131                                 draw_pixel(fbi, x, y, 0x00ffff);
132                         else if (x > 20 && y > 20 && x < w - 20 && y < h - 20) {
133                                 int t = x * 3 / w;
134                                 unsigned r = 0, g = 0, b = 0;
135                                 unsigned c;
136                                 if (var->bits_per_pixel == 16) {
137                                         if (t == 0)
138                                                 b = (y % 32) * 256 / 32;
139                                         else if (t == 1)
140                                                 g = (y % 64) * 256 / 64;
141                                         else if (t == 2)
142                                                 r = (y % 32) * 256 / 32;
143                                 } else {
144                                         if (t == 0)
145                                                 b = (y % 256);
146                                         else if (t == 1)
147                                                 g = (y % 256);
148                                         else if (t == 2)
149                                                 r = (y % 256);
150                                 }
151                                 c = (r << 16) | (g << 8) | (b << 0);
152                                 draw_pixel(fbi, x, y, c);
153                         } else {
154                                 draw_pixel(fbi, x, y, 0);
155                         }
156                 }
157         }
158 }
159 #endif
160
161 static unsigned omapfb_get_vrfb_offset(const struct omapfb_info *ofbi, int rot)
162 {
163         const struct vrfb *vrfb = &ofbi->region->vrfb;
164         unsigned offset;
165
166         switch (rot) {
167         case FB_ROTATE_UR:
168                 offset = 0;
169                 break;
170         case FB_ROTATE_CW:
171                 offset = vrfb->yoffset;
172                 break;
173         case FB_ROTATE_UD:
174                 offset = vrfb->yoffset * OMAP_VRFB_LINE_LEN + vrfb->xoffset;
175                 break;
176         case FB_ROTATE_CCW:
177                 offset = vrfb->xoffset * OMAP_VRFB_LINE_LEN;
178                 break;
179         default:
180                 BUG();
181                 return 0;
182         }
183
184         offset *= vrfb->bytespp;
185
186         return offset;
187 }
188
189 static u32 omapfb_get_region_rot_paddr(const struct omapfb_info *ofbi, int rot)
190 {
191         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
192                 return ofbi->region->vrfb.paddr[rot]
193                         + omapfb_get_vrfb_offset(ofbi, rot);
194         } else {
195                 return ofbi->region->paddr;
196         }
197 }
198
199 static u32 omapfb_get_region_paddr(const struct omapfb_info *ofbi)
200 {
201         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
202                 return ofbi->region->vrfb.paddr[0];
203         else
204                 return ofbi->region->paddr;
205 }
206
207 static void __iomem *omapfb_get_region_vaddr(const struct omapfb_info *ofbi)
208 {
209         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
210                 return ofbi->region->vrfb.vaddr[0];
211         else
212                 return ofbi->region->vaddr;
213 }
214
215 static struct omapfb_colormode omapfb_colormodes[] = {
216         {
217                 .dssmode = OMAP_DSS_COLOR_UYVY,
218                 .bits_per_pixel = 16,
219                 .nonstd = OMAPFB_COLOR_YUV422,
220         }, {
221                 .dssmode = OMAP_DSS_COLOR_YUV2,
222                 .bits_per_pixel = 16,
223                 .nonstd = OMAPFB_COLOR_YUY422,
224         }, {
225                 .dssmode = OMAP_DSS_COLOR_ARGB16,
226                 .bits_per_pixel = 16,
227                 .red    = { .length = 4, .offset = 8, .msb_right = 0 },
228                 .green  = { .length = 4, .offset = 4, .msb_right = 0 },
229                 .blue   = { .length = 4, .offset = 0, .msb_right = 0 },
230                 .transp = { .length = 4, .offset = 12, .msb_right = 0 },
231         }, {
232                 .dssmode = OMAP_DSS_COLOR_RGB16,
233                 .bits_per_pixel = 16,
234                 .red    = { .length = 5, .offset = 11, .msb_right = 0 },
235                 .green  = { .length = 6, .offset = 5, .msb_right = 0 },
236                 .blue   = { .length = 5, .offset = 0, .msb_right = 0 },
237                 .transp = { .length = 0, .offset = 0, .msb_right = 0 },
238         }, {
239                 .dssmode = OMAP_DSS_COLOR_RGB24P,
240                 .bits_per_pixel = 24,
241                 .red    = { .length = 8, .offset = 16, .msb_right = 0 },
242                 .green  = { .length = 8, .offset = 8, .msb_right = 0 },
243                 .blue   = { .length = 8, .offset = 0, .msb_right = 0 },
244                 .transp = { .length = 0, .offset = 0, .msb_right = 0 },
245         }, {
246                 .dssmode = OMAP_DSS_COLOR_RGB24U,
247                 .bits_per_pixel = 32,
248                 .red    = { .length = 8, .offset = 16, .msb_right = 0 },
249                 .green  = { .length = 8, .offset = 8, .msb_right = 0 },
250                 .blue   = { .length = 8, .offset = 0, .msb_right = 0 },
251                 .transp = { .length = 0, .offset = 0, .msb_right = 0 },
252         }, {
253                 .dssmode = OMAP_DSS_COLOR_ARGB32,
254                 .bits_per_pixel = 32,
255                 .red    = { .length = 8, .offset = 16, .msb_right = 0 },
256                 .green  = { .length = 8, .offset = 8, .msb_right = 0 },
257                 .blue   = { .length = 8, .offset = 0, .msb_right = 0 },
258                 .transp = { .length = 8, .offset = 24, .msb_right = 0 },
259         }, {
260                 .dssmode = OMAP_DSS_COLOR_RGBA32,
261                 .bits_per_pixel = 32,
262                 .red    = { .length = 8, .offset = 24, .msb_right = 0 },
263                 .green  = { .length = 8, .offset = 16, .msb_right = 0 },
264                 .blue   = { .length = 8, .offset = 8, .msb_right = 0 },
265                 .transp = { .length = 8, .offset = 0, .msb_right = 0 },
266         }, {
267                 .dssmode = OMAP_DSS_COLOR_RGBX32,
268                 .bits_per_pixel = 32,
269                 .red    = { .length = 8, .offset = 24, .msb_right = 0 },
270                 .green  = { .length = 8, .offset = 16, .msb_right = 0 },
271                 .blue   = { .length = 8, .offset = 8, .msb_right = 0 },
272                 .transp = { .length = 0, .offset = 0, .msb_right = 0 },
273         },
274 };
275
276 static bool cmp_component(struct fb_bitfield *f1, struct fb_bitfield *f2)
277 {
278         return f1->length == f2->length &&
279                 f1->offset == f2->offset &&
280                 f1->msb_right == f2->msb_right;
281 }
282
283 static bool cmp_var_to_colormode(struct fb_var_screeninfo *var,
284                 struct omapfb_colormode *color)
285 {
286         if (var->bits_per_pixel == 0 ||
287                         var->red.length == 0 ||
288                         var->blue.length == 0 ||
289                         var->green.length == 0)
290                 return 0;
291
292         return var->bits_per_pixel == color->bits_per_pixel &&
293                 cmp_component(&var->red, &color->red) &&
294                 cmp_component(&var->green, &color->green) &&
295                 cmp_component(&var->blue, &color->blue) &&
296                 cmp_component(&var->transp, &color->transp);
297 }
298
299 static void assign_colormode_to_var(struct fb_var_screeninfo *var,
300                 struct omapfb_colormode *color)
301 {
302         var->bits_per_pixel = color->bits_per_pixel;
303         var->nonstd = color->nonstd;
304         var->red = color->red;
305         var->green = color->green;
306         var->blue = color->blue;
307         var->transp = color->transp;
308 }
309
310 static int fb_mode_to_dss_mode(struct fb_var_screeninfo *var,
311                 enum omap_color_mode *mode)
312 {
313         enum omap_color_mode dssmode;
314         int i;
315
316         /* first match with nonstd field */
317         if (var->nonstd) {
318                 for (i = 0; i < ARRAY_SIZE(omapfb_colormodes); ++i) {
319                         struct omapfb_colormode *m = &omapfb_colormodes[i];
320                         if (var->nonstd == m->nonstd) {
321                                 assign_colormode_to_var(var, m);
322                                 *mode = m->dssmode;
323                                 return 0;
324                         }
325                 }
326
327                 return -EINVAL;
328         }
329
330         /* then try exact match of bpp and colors */
331         for (i = 0; i < ARRAY_SIZE(omapfb_colormodes); ++i) {
332                 struct omapfb_colormode *m = &omapfb_colormodes[i];
333                 if (cmp_var_to_colormode(var, m)) {
334                         assign_colormode_to_var(var, m);
335                         *mode = m->dssmode;
336                         return 0;
337                 }
338         }
339
340         /* match with bpp if user has not filled color fields
341          * properly */
342         switch (var->bits_per_pixel) {
343         case 1:
344                 dssmode = OMAP_DSS_COLOR_CLUT1;
345                 break;
346         case 2:
347                 dssmode = OMAP_DSS_COLOR_CLUT2;
348                 break;
349         case 4:
350                 dssmode = OMAP_DSS_COLOR_CLUT4;
351                 break;
352         case 8:
353                 dssmode = OMAP_DSS_COLOR_CLUT8;
354                 break;
355         case 12:
356                 dssmode = OMAP_DSS_COLOR_RGB12U;
357                 break;
358         case 16:
359                 dssmode = OMAP_DSS_COLOR_RGB16;
360                 break;
361         case 24:
362                 dssmode = OMAP_DSS_COLOR_RGB24P;
363                 break;
364         case 32:
365                 dssmode = OMAP_DSS_COLOR_RGB24U;
366                 break;
367         default:
368                 return -EINVAL;
369         }
370
371         for (i = 0; i < ARRAY_SIZE(omapfb_colormodes); ++i) {
372                 struct omapfb_colormode *m = &omapfb_colormodes[i];
373                 if (dssmode == m->dssmode) {
374                         assign_colormode_to_var(var, m);
375                         *mode = m->dssmode;
376                         return 0;
377                 }
378         }
379
380         return -EINVAL;
381 }
382
383 static int check_fb_res_bounds(struct fb_var_screeninfo *var)
384 {
385         int xres_min = OMAPFB_PLANE_XRES_MIN;
386         int xres_max = 2048;
387         int yres_min = OMAPFB_PLANE_YRES_MIN;
388         int yres_max = 2048;
389
390         /* XXX: some applications seem to set virtual res to 0. */
391         if (var->xres_virtual == 0)
392                 var->xres_virtual = var->xres;
393
394         if (var->yres_virtual == 0)
395                 var->yres_virtual = var->yres;
396
397         if (var->xres_virtual < xres_min || var->yres_virtual < yres_min)
398                 return -EINVAL;
399
400         if (var->xres < xres_min)
401                 var->xres = xres_min;
402         if (var->yres < yres_min)
403                 var->yres = yres_min;
404         if (var->xres > xres_max)
405                 var->xres = xres_max;
406         if (var->yres > yres_max)
407                 var->yres = yres_max;
408
409         if (var->xres > var->xres_virtual)
410                 var->xres = var->xres_virtual;
411         if (var->yres > var->yres_virtual)
412                 var->yres = var->yres_virtual;
413
414         return 0;
415 }
416
417 static void shrink_height(unsigned long max_frame_size,
418                 struct fb_var_screeninfo *var)
419 {
420         DBG("can't fit FB into memory, reducing y\n");
421         var->yres_virtual = max_frame_size /
422                 (var->xres_virtual * var->bits_per_pixel >> 3);
423
424         if (var->yres_virtual < OMAPFB_PLANE_YRES_MIN)
425                 var->yres_virtual = OMAPFB_PLANE_YRES_MIN;
426
427         if (var->yres > var->yres_virtual)
428                 var->yres = var->yres_virtual;
429 }
430
431 static void shrink_width(unsigned long max_frame_size,
432                 struct fb_var_screeninfo *var)
433 {
434         DBG("can't fit FB into memory, reducing x\n");
435         var->xres_virtual = max_frame_size / var->yres_virtual /
436                 (var->bits_per_pixel >> 3);
437
438         if (var->xres_virtual < OMAPFB_PLANE_XRES_MIN)
439                 var->xres_virtual = OMAPFB_PLANE_XRES_MIN;
440
441         if (var->xres > var->xres_virtual)
442                 var->xres = var->xres_virtual;
443 }
444
445 static int check_vrfb_fb_size(unsigned long region_size,
446                 const struct fb_var_screeninfo *var)
447 {
448         unsigned long min_phys_size = omap_vrfb_min_phys_size(var->xres_virtual,
449                 var->yres_virtual, var->bits_per_pixel >> 3);
450
451         return min_phys_size > region_size ? -EINVAL : 0;
452 }
453
454 static int check_fb_size(const struct omapfb_info *ofbi,
455                 struct fb_var_screeninfo *var)
456 {
457         unsigned long max_frame_size = ofbi->region->size;
458         int bytespp = var->bits_per_pixel >> 3;
459         unsigned long line_size = var->xres_virtual * bytespp;
460
461         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
462                 /* One needs to check for both VRFB and OMAPFB limitations. */
463                 if (check_vrfb_fb_size(max_frame_size, var))
464                         shrink_height(omap_vrfb_max_height(
465                                 max_frame_size, var->xres_virtual, bytespp) *
466                                 line_size, var);
467
468                 if (check_vrfb_fb_size(max_frame_size, var)) {
469                         DBG("cannot fit FB to memory\n");
470                         return -EINVAL;
471                 }
472
473                 return 0;
474         }
475
476         DBG("max frame size %lu, line size %lu\n", max_frame_size, line_size);
477
478         if (line_size * var->yres_virtual > max_frame_size)
479                 shrink_height(max_frame_size, var);
480
481         if (line_size * var->yres_virtual > max_frame_size) {
482                 shrink_width(max_frame_size, var);
483                 line_size = var->xres_virtual * bytespp;
484         }
485
486         if (line_size * var->yres_virtual > max_frame_size) {
487                 DBG("cannot fit FB to memory\n");
488                 return -EINVAL;
489         }
490
491         return 0;
492 }
493
494 /*
495  * Consider if VRFB assisted rotation is in use and if the virtual space for
496  * the zero degree view needs to be mapped. The need for mapping also acts as
497  * the trigger for setting up the hardware on the context in question. This
498  * ensures that one does not attempt to access the virtual view before the
499  * hardware is serving the address translations.
500  */
501 static int setup_vrfb_rotation(struct fb_info *fbi)
502 {
503         struct omapfb_info *ofbi = FB2OFB(fbi);
504         struct omapfb2_mem_region *rg = ofbi->region;
505         struct vrfb *vrfb = &rg->vrfb;
506         struct fb_var_screeninfo *var = &fbi->var;
507         struct fb_fix_screeninfo *fix = &fbi->fix;
508         unsigned bytespp;
509         bool yuv_mode;
510         enum omap_color_mode mode;
511         int r;
512         bool reconf;
513
514         if (!rg->size || ofbi->rotation_type != OMAP_DSS_ROT_VRFB)
515                 return 0;
516
517         DBG("setup_vrfb_rotation\n");
518
519         r = fb_mode_to_dss_mode(var, &mode);
520         if (r)
521                 return r;
522
523         bytespp = var->bits_per_pixel >> 3;
524
525         yuv_mode = mode == OMAP_DSS_COLOR_YUV2 || mode == OMAP_DSS_COLOR_UYVY;
526
527         /* We need to reconfigure VRFB if the resolution changes, if yuv mode
528          * is enabled/disabled, or if bytes per pixel changes */
529
530         /* XXX we shouldn't allow this when framebuffer is mmapped */
531
532         reconf = false;
533
534         if (yuv_mode != vrfb->yuv_mode)
535                 reconf = true;
536         else if (bytespp != vrfb->bytespp)
537                 reconf = true;
538         else if (vrfb->xres != var->xres_virtual ||
539                         vrfb->yres != var->yres_virtual)
540                 reconf = true;
541
542         if (vrfb->vaddr[0] && reconf) {
543                 fbi->screen_base = NULL;
544                 fix->smem_start = 0;
545                 fix->smem_len = 0;
546                 iounmap(vrfb->vaddr[0]);
547                 vrfb->vaddr[0] = NULL;
548                 DBG("setup_vrfb_rotation: reset fb\n");
549         }
550
551         if (vrfb->vaddr[0])
552                 return 0;
553
554         omap_vrfb_setup(&rg->vrfb, rg->paddr,
555                         var->xres_virtual,
556                         var->yres_virtual,
557                         bytespp, yuv_mode);
558
559         /* Now one can ioremap the 0 angle view */
560         r = omap_vrfb_map_angle(vrfb, var->yres_virtual, 0);
561         if (r)
562                 return r;
563
564         /* used by open/write in fbmem.c */
565         fbi->screen_base = ofbi->region->vrfb.vaddr[0];
566
567         fix->smem_start = ofbi->region->vrfb.paddr[0];
568
569         switch (var->nonstd) {
570         case OMAPFB_COLOR_YUV422:
571         case OMAPFB_COLOR_YUY422:
572                 fix->line_length =
573                         (OMAP_VRFB_LINE_LEN * var->bits_per_pixel) >> 2;
574                 break;
575         default:
576                 fix->line_length =
577                         (OMAP_VRFB_LINE_LEN * var->bits_per_pixel) >> 3;
578                 break;
579         }
580
581         fix->smem_len = var->yres_virtual * fix->line_length;
582
583         return 0;
584 }
585
586 int dss_mode_to_fb_mode(enum omap_color_mode dssmode,
587                         struct fb_var_screeninfo *var)
588 {
589         int i;
590
591         for (i = 0; i < ARRAY_SIZE(omapfb_colormodes); ++i) {
592                 struct omapfb_colormode *mode = &omapfb_colormodes[i];
593                 if (dssmode == mode->dssmode) {
594                         assign_colormode_to_var(var, mode);
595                         return 0;
596                 }
597         }
598         return -ENOENT;
599 }
600
601 void set_fb_fix(struct fb_info *fbi)
602 {
603         struct fb_fix_screeninfo *fix = &fbi->fix;
604         struct fb_var_screeninfo *var = &fbi->var;
605         struct omapfb_info *ofbi = FB2OFB(fbi);
606         struct omapfb2_mem_region *rg = ofbi->region;
607
608         DBG("set_fb_fix\n");
609
610         /* used by open/write in fbmem.c */
611         fbi->screen_base = (char __iomem *)omapfb_get_region_vaddr(ofbi);
612
613         /* used by mmap in fbmem.c */
614         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
615                 switch (var->nonstd) {
616                 case OMAPFB_COLOR_YUV422:
617                 case OMAPFB_COLOR_YUY422:
618                         fix->line_length =
619                                 (OMAP_VRFB_LINE_LEN * var->bits_per_pixel) >> 2;
620                         break;
621                 default:
622                         fix->line_length =
623                                 (OMAP_VRFB_LINE_LEN * var->bits_per_pixel) >> 3;
624                         break;
625                 }
626
627                 fix->smem_len = var->yres_virtual * fix->line_length;
628         } else {
629                 fix->line_length =
630                         (var->xres_virtual * var->bits_per_pixel) >> 3;
631                 fix->smem_len = rg->size;
632         }
633
634         fix->smem_start = omapfb_get_region_paddr(ofbi);
635
636         fix->type = FB_TYPE_PACKED_PIXELS;
637
638         if (var->nonstd)
639                 fix->visual = FB_VISUAL_PSEUDOCOLOR;
640         else {
641                 switch (var->bits_per_pixel) {
642                 case 32:
643                 case 24:
644                 case 16:
645                 case 12:
646                         fix->visual = FB_VISUAL_TRUECOLOR;
647                         /* 12bpp is stored in 16 bits */
648                         break;
649                 case 1:
650                 case 2:
651                 case 4:
652                 case 8:
653                         fix->visual = FB_VISUAL_PSEUDOCOLOR;
654                         break;
655                 }
656         }
657
658         fix->accel = FB_ACCEL_NONE;
659
660         fix->xpanstep = 1;
661         fix->ypanstep = 1;
662 }
663
664 /* check new var and possibly modify it to be ok */
665 int check_fb_var(struct fb_info *fbi, struct fb_var_screeninfo *var)
666 {
667         struct omapfb_info *ofbi = FB2OFB(fbi);
668         struct omap_dss_device *display = fb2display(fbi);
669         enum omap_color_mode mode = 0;
670         int i;
671         int r;
672
673         DBG("check_fb_var %d\n", ofbi->id);
674
675         WARN_ON(!atomic_read(&ofbi->region->lock_count));
676
677         r = fb_mode_to_dss_mode(var, &mode);
678         if (r) {
679                 DBG("cannot convert var to omap dss mode\n");
680                 return r;
681         }
682
683         for (i = 0; i < ofbi->num_overlays; ++i) {
684                 if ((ofbi->overlays[i]->supported_modes & mode) == 0) {
685                         DBG("invalid mode\n");
686                         return -EINVAL;
687                 }
688         }
689
690         if (var->rotate > 3)
691                 return -EINVAL;
692
693         if (check_fb_res_bounds(var))
694                 return -EINVAL;
695
696         /* When no memory is allocated ignore the size check */
697         if (ofbi->region->size != 0 && check_fb_size(ofbi, var))
698                 return -EINVAL;
699
700         if (var->xres + var->xoffset > var->xres_virtual)
701                 var->xoffset = var->xres_virtual - var->xres;
702         if (var->yres + var->yoffset > var->yres_virtual)
703                 var->yoffset = var->yres_virtual - var->yres;
704
705         DBG("xres = %d, yres = %d, vxres = %d, vyres = %d\n",
706                         var->xres, var->yres,
707                         var->xres_virtual, var->yres_virtual);
708
709         if (display && display->driver->get_dimensions) {
710                 u32 w, h;
711                 display->driver->get_dimensions(display, &w, &h);
712                 var->width = DIV_ROUND_CLOSEST(w, 1000);
713                 var->height = DIV_ROUND_CLOSEST(h, 1000);
714         } else {
715                 var->height = -1;
716                 var->width = -1;
717         }
718
719         var->grayscale          = 0;
720
721         if (display && display->driver->get_timings) {
722                 struct omap_video_timings timings;
723                 display->driver->get_timings(display, &timings);
724
725                 /* pixclock in ps, the rest in pixclock */
726                 var->pixclock = timings.pixelclock != 0 ?
727                         KHZ2PICOS(timings.pixelclock / 1000) :
728                         0;
729                 var->left_margin = timings.hbp;
730                 var->right_margin = timings.hfp;
731                 var->upper_margin = timings.vbp;
732                 var->lower_margin = timings.vfp;
733                 var->hsync_len = timings.hsw;
734                 var->vsync_len = timings.vsw;
735                 var->sync |= timings.hsync_level == OMAPDSS_SIG_ACTIVE_HIGH ?
736                                 FB_SYNC_HOR_HIGH_ACT : 0;
737                 var->sync |= timings.vsync_level == OMAPDSS_SIG_ACTIVE_HIGH ?
738                                 FB_SYNC_VERT_HIGH_ACT : 0;
739                 var->vmode = timings.interlace ?
740                                 FB_VMODE_INTERLACED : FB_VMODE_NONINTERLACED;
741         } else {
742                 var->pixclock = 0;
743                 var->left_margin = 0;
744                 var->right_margin = 0;
745                 var->upper_margin = 0;
746                 var->lower_margin = 0;
747                 var->hsync_len = 0;
748                 var->vsync_len = 0;
749                 var->sync = 0;
750                 var->vmode = FB_VMODE_NONINTERLACED;
751         }
752
753         return 0;
754 }
755
756 /*
757  * ---------------------------------------------------------------------------
758  * fbdev framework callbacks
759  * ---------------------------------------------------------------------------
760  */
761 static int omapfb_open(struct fb_info *fbi, int user)
762 {
763         return 0;
764 }
765
766 static int omapfb_release(struct fb_info *fbi, int user)
767 {
768         return 0;
769 }
770
771 static unsigned calc_rotation_offset_dma(const struct fb_var_screeninfo *var,
772                 const struct fb_fix_screeninfo *fix, int rotation)
773 {
774         unsigned offset;
775
776         offset = var->yoffset * fix->line_length +
777                 var->xoffset * (var->bits_per_pixel >> 3);
778
779         return offset;
780 }
781
782 static unsigned calc_rotation_offset_vrfb(const struct fb_var_screeninfo *var,
783                 const struct fb_fix_screeninfo *fix, int rotation)
784 {
785         unsigned offset;
786
787         if (rotation == FB_ROTATE_UD)
788                 offset = (var->yres_virtual - var->yres) *
789                         fix->line_length;
790         else if (rotation == FB_ROTATE_CW)
791                 offset = (var->yres_virtual - var->yres) *
792                         (var->bits_per_pixel >> 3);
793         else
794                 offset = 0;
795
796         if (rotation == FB_ROTATE_UR)
797                 offset += var->yoffset * fix->line_length +
798                         var->xoffset * (var->bits_per_pixel >> 3);
799         else if (rotation == FB_ROTATE_UD)
800                 offset -= var->yoffset * fix->line_length +
801                         var->xoffset * (var->bits_per_pixel >> 3);
802         else if (rotation == FB_ROTATE_CW)
803                 offset -= var->xoffset * fix->line_length +
804                         var->yoffset * (var->bits_per_pixel >> 3);
805         else if (rotation == FB_ROTATE_CCW)
806                 offset += var->xoffset * fix->line_length +
807                         var->yoffset * (var->bits_per_pixel >> 3);
808
809         return offset;
810 }
811
812 static void omapfb_calc_addr(const struct omapfb_info *ofbi,
813                              const struct fb_var_screeninfo *var,
814                              const struct fb_fix_screeninfo *fix,
815                              int rotation, u32 *paddr)
816 {
817         u32 data_start_p;
818         int offset;
819
820         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
821                 data_start_p = omapfb_get_region_rot_paddr(ofbi, rotation);
822         else
823                 data_start_p = omapfb_get_region_paddr(ofbi);
824
825         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
826                 offset = calc_rotation_offset_vrfb(var, fix, rotation);
827         else
828                 offset = calc_rotation_offset_dma(var, fix, rotation);
829
830         data_start_p += offset;
831
832         if (offset)
833                 DBG("offset %d, %d = %d\n",
834                     var->xoffset, var->yoffset, offset);
835
836         DBG("paddr %x\n", data_start_p);
837
838         *paddr = data_start_p;
839 }
840
841 /* setup overlay according to the fb */
842 int omapfb_setup_overlay(struct fb_info *fbi, struct omap_overlay *ovl,
843                 u16 posx, u16 posy, u16 outw, u16 outh)
844 {
845         int r = 0;
846         struct omapfb_info *ofbi = FB2OFB(fbi);
847         struct fb_var_screeninfo *var = &fbi->var;
848         struct fb_fix_screeninfo *fix = &fbi->fix;
849         enum omap_color_mode mode = 0;
850         u32 data_start_p = 0;
851         struct omap_overlay_info info;
852         int xres, yres;
853         int screen_width;
854         int mirror;
855         int rotation = var->rotate;
856         int i;
857
858         WARN_ON(!atomic_read(&ofbi->region->lock_count));
859
860         for (i = 0; i < ofbi->num_overlays; i++) {
861                 if (ovl != ofbi->overlays[i])
862                         continue;
863
864                 rotation = (rotation + ofbi->rotation[i]) % 4;
865                 break;
866         }
867
868         DBG("setup_overlay %d, posx %d, posy %d, outw %d, outh %d\n", ofbi->id,
869                         posx, posy, outw, outh);
870
871         if (rotation == FB_ROTATE_CW || rotation == FB_ROTATE_CCW) {
872                 xres = var->yres;
873                 yres = var->xres;
874         } else {
875                 xres = var->xres;
876                 yres = var->yres;
877         }
878
879         if (ofbi->region->size)
880                 omapfb_calc_addr(ofbi, var, fix, rotation, &data_start_p);
881
882         r = fb_mode_to_dss_mode(var, &mode);
883         if (r) {
884                 DBG("fb_mode_to_dss_mode failed");
885                 goto err;
886         }
887
888         switch (var->nonstd) {
889         case OMAPFB_COLOR_YUV422:
890         case OMAPFB_COLOR_YUY422:
891                 if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
892                         screen_width = fix->line_length
893                                 / (var->bits_per_pixel >> 2);
894                         break;
895                 }
896         default:
897                 screen_width = fix->line_length / (var->bits_per_pixel >> 3);
898                 break;
899         }
900
901         ovl->get_overlay_info(ovl, &info);
902
903         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
904                 mirror = 0;
905         else
906                 mirror = ofbi->mirror;
907
908         info.paddr = data_start_p;
909         info.screen_width = screen_width;
910         info.width = xres;
911         info.height = yres;
912         info.color_mode = mode;
913         info.rotation_type = ofbi->rotation_type;
914         info.rotation = rotation;
915         info.mirror = mirror;
916
917         info.pos_x = posx;
918         info.pos_y = posy;
919         info.out_width = outw;
920         info.out_height = outh;
921
922         r = ovl->set_overlay_info(ovl, &info);
923         if (r) {
924                 DBG("ovl->setup_overlay_info failed\n");
925                 goto err;
926         }
927
928         return 0;
929
930 err:
931         DBG("setup_overlay failed\n");
932         return r;
933 }
934
935 /* apply var to the overlay */
936 int omapfb_apply_changes(struct fb_info *fbi, int init)
937 {
938         int r = 0;
939         struct omapfb_info *ofbi = FB2OFB(fbi);
940         struct fb_var_screeninfo *var = &fbi->var;
941         struct omap_overlay *ovl;
942         u16 posx, posy;
943         u16 outw, outh;
944         int i;
945
946 #ifdef DEBUG
947         if (omapfb_test_pattern)
948                 fill_fb(fbi);
949 #endif
950
951         WARN_ON(!atomic_read(&ofbi->region->lock_count));
952
953         for (i = 0; i < ofbi->num_overlays; i++) {
954                 ovl = ofbi->overlays[i];
955
956                 DBG("apply_changes, fb %d, ovl %d\n", ofbi->id, ovl->id);
957
958                 if (ofbi->region->size == 0) {
959                         /* the fb is not available. disable the overlay */
960                         omapfb_overlay_enable(ovl, 0);
961                         if (!init && ovl->manager)
962                                 ovl->manager->apply(ovl->manager);
963                         continue;
964                 }
965
966                 if (init || (ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) {
967                         int rotation = (var->rotate + ofbi->rotation[i]) % 4;
968                         if (rotation == FB_ROTATE_CW ||
969                                         rotation == FB_ROTATE_CCW) {
970                                 outw = var->yres;
971                                 outh = var->xres;
972                         } else {
973                                 outw = var->xres;
974                                 outh = var->yres;
975                         }
976                 } else {
977                         struct omap_overlay_info info;
978                         ovl->get_overlay_info(ovl, &info);
979                         outw = info.out_width;
980                         outh = info.out_height;
981                 }
982
983                 if (init) {
984                         posx = 0;
985                         posy = 0;
986                 } else {
987                         struct omap_overlay_info info;
988                         ovl->get_overlay_info(ovl, &info);
989                         posx = info.pos_x;
990                         posy = info.pos_y;
991                 }
992
993                 r = omapfb_setup_overlay(fbi, ovl, posx, posy, outw, outh);
994                 if (r)
995                         goto err;
996
997                 if (!init && ovl->manager)
998                         ovl->manager->apply(ovl->manager);
999         }
1000         return 0;
1001 err:
1002         DBG("apply_changes failed\n");
1003         return r;
1004 }
1005
1006 /* checks var and eventually tweaks it to something supported,
1007  * DO NOT MODIFY PAR */
1008 static int omapfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
1009 {
1010         struct omapfb_info *ofbi = FB2OFB(fbi);
1011         int r;
1012
1013         DBG("check_var(%d)\n", FB2OFB(fbi)->id);
1014
1015         omapfb_get_mem_region(ofbi->region);
1016
1017         r = check_fb_var(fbi, var);
1018
1019         omapfb_put_mem_region(ofbi->region);
1020
1021         return r;
1022 }
1023
1024 /* set the video mode according to info->var */
1025 static int omapfb_set_par(struct fb_info *fbi)
1026 {
1027         struct omapfb_info *ofbi = FB2OFB(fbi);
1028         int r;
1029
1030         DBG("set_par(%d)\n", FB2OFB(fbi)->id);
1031
1032         omapfb_get_mem_region(ofbi->region);
1033
1034         set_fb_fix(fbi);
1035
1036         r = setup_vrfb_rotation(fbi);
1037         if (r)
1038                 goto out;
1039
1040         r = omapfb_apply_changes(fbi, 0);
1041
1042  out:
1043         omapfb_put_mem_region(ofbi->region);
1044
1045         return r;
1046 }
1047
1048 static int omapfb_pan_display(struct fb_var_screeninfo *var,
1049                 struct fb_info *fbi)
1050 {
1051         struct omapfb_info *ofbi = FB2OFB(fbi);
1052         struct fb_var_screeninfo new_var;
1053         int r;
1054
1055         DBG("pan_display(%d)\n", FB2OFB(fbi)->id);
1056
1057         if (var->xoffset == fbi->var.xoffset &&
1058             var->yoffset == fbi->var.yoffset)
1059                 return 0;
1060
1061         new_var = fbi->var;
1062         new_var.xoffset = var->xoffset;
1063         new_var.yoffset = var->yoffset;
1064
1065         fbi->var = new_var;
1066
1067         omapfb_get_mem_region(ofbi->region);
1068
1069         r = omapfb_apply_changes(fbi, 0);
1070
1071         omapfb_put_mem_region(ofbi->region);
1072
1073         return r;
1074 }
1075
1076 static void mmap_user_open(struct vm_area_struct *vma)
1077 {
1078         struct omapfb2_mem_region *rg = vma->vm_private_data;
1079
1080         omapfb_get_mem_region(rg);
1081         atomic_inc(&rg->map_count);
1082         omapfb_put_mem_region(rg);
1083 }
1084
1085 static void mmap_user_close(struct vm_area_struct *vma)
1086 {
1087         struct omapfb2_mem_region *rg = vma->vm_private_data;
1088
1089         omapfb_get_mem_region(rg);
1090         atomic_dec(&rg->map_count);
1091         omapfb_put_mem_region(rg);
1092 }
1093
1094 static const struct vm_operations_struct mmap_user_ops = {
1095         .open = mmap_user_open,
1096         .close = mmap_user_close,
1097 };
1098
1099 static int omapfb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
1100 {
1101         struct omapfb_info *ofbi = FB2OFB(fbi);
1102         struct fb_fix_screeninfo *fix = &fbi->fix;
1103         struct omapfb2_mem_region *rg;
1104         unsigned long start;
1105         u32 len;
1106         int r;
1107
1108         rg = omapfb_get_mem_region(ofbi->region);
1109
1110         start = omapfb_get_region_paddr(ofbi);
1111         len = fix->smem_len;
1112
1113         DBG("user mmap region start %lx, len %d, off %lx\n", start, len,
1114                         vma->vm_pgoff << PAGE_SHIFT);
1115
1116         vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
1117         vma->vm_ops = &mmap_user_ops;
1118         vma->vm_private_data = rg;
1119
1120         r = vm_iomap_memory(vma, start, len);
1121         if (r)
1122                 goto error;
1123
1124         /* vm_ops.open won't be called for mmap itself. */
1125         atomic_inc(&rg->map_count);
1126
1127         omapfb_put_mem_region(rg);
1128
1129         return 0;
1130
1131 error:
1132         omapfb_put_mem_region(ofbi->region);
1133
1134         return r;
1135 }
1136
1137 /* Store a single color palette entry into a pseudo palette or the hardware
1138  * palette if one is available. For now we support only 16bpp and thus store
1139  * the entry only to the pseudo palette.
1140  */
1141 static int _setcolreg(struct fb_info *fbi, u_int regno, u_int red, u_int green,
1142                 u_int blue, u_int transp, int update_hw_pal)
1143 {
1144         /*struct omapfb_info *ofbi = FB2OFB(fbi);*/
1145         /*struct omapfb2_device *fbdev = ofbi->fbdev;*/
1146         struct fb_var_screeninfo *var = &fbi->var;
1147         int r = 0;
1148
1149         enum omapfb_color_format mode = OMAPFB_COLOR_RGB24U; /* XXX */
1150
1151         /*switch (plane->color_mode) {*/
1152         switch (mode) {
1153         case OMAPFB_COLOR_YUV422:
1154         case OMAPFB_COLOR_YUV420:
1155         case OMAPFB_COLOR_YUY422:
1156                 r = -EINVAL;
1157                 break;
1158         case OMAPFB_COLOR_CLUT_8BPP:
1159         case OMAPFB_COLOR_CLUT_4BPP:
1160         case OMAPFB_COLOR_CLUT_2BPP:
1161         case OMAPFB_COLOR_CLUT_1BPP:
1162                 /*
1163                    if (fbdev->ctrl->setcolreg)
1164                    r = fbdev->ctrl->setcolreg(regno, red, green, blue,
1165                    transp, update_hw_pal);
1166                    */
1167                 /* Fallthrough */
1168                 r = -EINVAL;
1169                 break;
1170         case OMAPFB_COLOR_RGB565:
1171         case OMAPFB_COLOR_RGB444:
1172         case OMAPFB_COLOR_RGB24P:
1173         case OMAPFB_COLOR_RGB24U:
1174                 if (r != 0)
1175                         break;
1176
1177                 if (regno < 16) {
1178                         u32 pal;
1179                         pal = ((red >> (16 - var->red.length)) <<
1180                                         var->red.offset) |
1181                                 ((green >> (16 - var->green.length)) <<
1182                                  var->green.offset) |
1183                                 (blue >> (16 - var->blue.length));
1184                         ((u32 *)(fbi->pseudo_palette))[regno] = pal;
1185                 }
1186                 break;
1187         default:
1188                 BUG();
1189         }
1190         return r;
1191 }
1192
1193 static int omapfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
1194                 u_int transp, struct fb_info *info)
1195 {
1196         DBG("setcolreg\n");
1197
1198         return _setcolreg(info, regno, red, green, blue, transp, 1);
1199 }
1200
1201 static int omapfb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
1202 {
1203         int count, index, r;
1204         u16 *red, *green, *blue, *transp;
1205         u16 trans = 0xffff;
1206
1207         DBG("setcmap\n");
1208
1209         red     = cmap->red;
1210         green   = cmap->green;
1211         blue    = cmap->blue;
1212         transp  = cmap->transp;
1213         index   = cmap->start;
1214
1215         for (count = 0; count < cmap->len; count++) {
1216                 if (transp)
1217                         trans = *transp++;
1218                 r = _setcolreg(info, index++, *red++, *green++, *blue++, trans,
1219                                 count == cmap->len - 1);
1220                 if (r != 0)
1221                         return r;
1222         }
1223
1224         return 0;
1225 }
1226
1227 static int omapfb_blank(int blank, struct fb_info *fbi)
1228 {
1229         struct omapfb_info *ofbi = FB2OFB(fbi);
1230         struct omapfb2_device *fbdev = ofbi->fbdev;
1231         struct omap_dss_device *display = fb2display(fbi);
1232         struct omapfb_display_data *d;
1233         int r = 0;
1234
1235         if (!display)
1236                 return -EINVAL;
1237
1238         omapfb_lock(fbdev);
1239
1240         d = get_display_data(fbdev, display);
1241
1242         switch (blank) {
1243         case FB_BLANK_UNBLANK:
1244                 if (display->state == OMAP_DSS_DISPLAY_ACTIVE)
1245                         goto exit;
1246
1247                 r = display->driver->enable(display);
1248
1249                 if ((display->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) &&
1250                                 d->update_mode == OMAPFB_AUTO_UPDATE &&
1251                                 !d->auto_update_work_enabled)
1252                         omapfb_start_auto_update(fbdev, display);
1253
1254                 break;
1255
1256         case FB_BLANK_NORMAL:
1257                 /* FB_BLANK_NORMAL could be implemented.
1258                  * Needs DSS additions. */
1259         case FB_BLANK_VSYNC_SUSPEND:
1260         case FB_BLANK_HSYNC_SUSPEND:
1261         case FB_BLANK_POWERDOWN:
1262                 if (display->state != OMAP_DSS_DISPLAY_ACTIVE)
1263                         goto exit;
1264
1265                 if (d->auto_update_work_enabled)
1266                         omapfb_stop_auto_update(fbdev, display);
1267
1268                 display->driver->disable(display);
1269
1270                 break;
1271
1272         default:
1273                 r = -EINVAL;
1274         }
1275
1276 exit:
1277         omapfb_unlock(fbdev);
1278
1279         return r;
1280 }
1281
1282 #if 0
1283 /* XXX fb_read and fb_write are needed for VRFB */
1284 ssize_t omapfb_write(struct fb_info *info, const char __user *buf,
1285                 size_t count, loff_t *ppos)
1286 {
1287         DBG("omapfb_write %d, %lu\n", count, (unsigned long)*ppos);
1288         /* XXX needed for VRFB */
1289         return count;
1290 }
1291 #endif
1292
1293 static struct fb_ops omapfb_ops = {
1294         .owner          = THIS_MODULE,
1295         .fb_open        = omapfb_open,
1296         .fb_release     = omapfb_release,
1297         .fb_fillrect    = cfb_fillrect,
1298         .fb_copyarea    = cfb_copyarea,
1299         .fb_imageblit   = cfb_imageblit,
1300         .fb_blank       = omapfb_blank,
1301         .fb_ioctl       = omapfb_ioctl,
1302         .fb_check_var   = omapfb_check_var,
1303         .fb_set_par     = omapfb_set_par,
1304         .fb_pan_display = omapfb_pan_display,
1305         .fb_mmap        = omapfb_mmap,
1306         .fb_setcolreg   = omapfb_setcolreg,
1307         .fb_setcmap     = omapfb_setcmap,
1308         /*.fb_write     = omapfb_write,*/
1309 };
1310
1311 static void omapfb_free_fbmem(struct fb_info *fbi)
1312 {
1313         struct omapfb_info *ofbi = FB2OFB(fbi);
1314         struct omapfb2_device *fbdev = ofbi->fbdev;
1315         struct omapfb2_mem_region *rg;
1316
1317         rg = ofbi->region;
1318
1319         if (rg->token == NULL)
1320                 return;
1321
1322         WARN_ON(atomic_read(&rg->map_count));
1323
1324         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
1325                 /* unmap the 0 angle rotation */
1326                 if (rg->vrfb.vaddr[0]) {
1327                         iounmap(rg->vrfb.vaddr[0]);
1328                         rg->vrfb.vaddr[0] = NULL;
1329                 }
1330
1331                 omap_vrfb_release_ctx(&rg->vrfb);
1332         }
1333
1334         dma_free_attrs(fbdev->dev, rg->size, rg->token, rg->dma_handle,
1335                         rg->attrs);
1336
1337         rg->token = NULL;
1338         rg->vaddr = NULL;
1339         rg->paddr = 0;
1340         rg->alloc = 0;
1341         rg->size = 0;
1342 }
1343
1344 static void clear_fb_info(struct fb_info *fbi)
1345 {
1346         memset(&fbi->var, 0, sizeof(fbi->var));
1347         memset(&fbi->fix, 0, sizeof(fbi->fix));
1348         strlcpy(fbi->fix.id, MODULE_NAME, sizeof(fbi->fix.id));
1349 }
1350
1351 static int omapfb_free_all_fbmem(struct omapfb2_device *fbdev)
1352 {
1353         int i;
1354
1355         DBG("free all fbmem\n");
1356
1357         for (i = 0; i < fbdev->num_fbs; i++) {
1358                 struct fb_info *fbi = fbdev->fbs[i];
1359                 omapfb_free_fbmem(fbi);
1360                 clear_fb_info(fbi);
1361         }
1362
1363         return 0;
1364 }
1365
1366 static int omapfb_alloc_fbmem(struct fb_info *fbi, unsigned long size,
1367                 unsigned long paddr)
1368 {
1369         struct omapfb_info *ofbi = FB2OFB(fbi);
1370         struct omapfb2_device *fbdev = ofbi->fbdev;
1371         struct omapfb2_mem_region *rg;
1372         void *token;
1373         unsigned long attrs;
1374         dma_addr_t dma_handle;
1375         int r;
1376
1377         rg = ofbi->region;
1378
1379         rg->paddr = 0;
1380         rg->vaddr = NULL;
1381         memset(&rg->vrfb, 0, sizeof rg->vrfb);
1382         rg->size = 0;
1383         rg->type = 0;
1384         rg->alloc = false;
1385         rg->map = false;
1386
1387         size = PAGE_ALIGN(size);
1388
1389         attrs = DMA_ATTR_WRITE_COMBINE;
1390
1391         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
1392                 attrs |= DMA_ATTR_NO_KERNEL_MAPPING;
1393
1394         DBG("allocating %lu bytes for fb %d\n", size, ofbi->id);
1395
1396         token = dma_alloc_attrs(fbdev->dev, size, &dma_handle,
1397                         GFP_KERNEL, attrs);
1398
1399         if (token == NULL) {
1400                 dev_err(fbdev->dev, "failed to allocate framebuffer\n");
1401                 return -ENOMEM;
1402         }
1403
1404         DBG("allocated VRAM paddr %lx, vaddr %p\n",
1405                         (unsigned long)dma_handle, token);
1406
1407         if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
1408                 r = omap_vrfb_request_ctx(&rg->vrfb);
1409                 if (r) {
1410                         dma_free_attrs(fbdev->dev, size, token, dma_handle,
1411                                         attrs);
1412                         dev_err(fbdev->dev, "vrfb create ctx failed\n");
1413                         return r;
1414                 }
1415         }
1416
1417         rg->attrs = attrs;
1418         rg->token = token;
1419         rg->dma_handle = dma_handle;
1420
1421         rg->paddr = (unsigned long)dma_handle;
1422         rg->vaddr = (void __iomem *)token;
1423         rg->size = size;
1424         rg->alloc = 1;
1425
1426         return 0;
1427 }
1428
1429 /* allocate fbmem using display resolution as reference */
1430 static int omapfb_alloc_fbmem_display(struct fb_info *fbi, unsigned long size,
1431                 unsigned long paddr)
1432 {
1433         struct omapfb_info *ofbi = FB2OFB(fbi);
1434         struct omapfb2_device *fbdev = ofbi->fbdev;
1435         struct omap_dss_device *display;
1436         int bytespp;
1437
1438         display =  fb2display(fbi);
1439
1440         if (!display)
1441                 return 0;
1442
1443         switch (omapfb_get_recommended_bpp(fbdev, display)) {
1444         case 16:
1445                 bytespp = 2;
1446                 break;
1447         case 24:
1448                 bytespp = 4;
1449                 break;
1450         default:
1451                 bytespp = 4;
1452                 break;
1453         }
1454
1455         if (!size) {
1456                 u16 w, h;
1457
1458                 display->driver->get_resolution(display, &w, &h);
1459
1460                 if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
1461                         size = max(omap_vrfb_min_phys_size(w, h, bytespp),
1462                                         omap_vrfb_min_phys_size(h, w, bytespp));
1463
1464                         DBG("adjusting fb mem size for VRFB, %u -> %lu\n",
1465                                         w * h * bytespp, size);
1466                 } else {
1467                         size = w * h * bytespp;
1468                 }
1469         }
1470
1471         if (!size)
1472                 return 0;
1473
1474         return omapfb_alloc_fbmem(fbi, size, paddr);
1475 }
1476
1477 static int omapfb_parse_vram_param(const char *param, int max_entries,
1478                 unsigned long *sizes, unsigned long *paddrs)
1479 {
1480         unsigned int fbnum;
1481         unsigned long size;
1482         unsigned long paddr = 0;
1483         char *p, *start;
1484
1485         start = (char *)param;
1486
1487         while (1) {
1488                 p = start;
1489
1490                 fbnum = simple_strtoul(p, &p, 10);
1491
1492                 if (p == start)
1493                         return -EINVAL;
1494
1495                 if (*p != ':')
1496                         return -EINVAL;
1497
1498                 if (fbnum >= max_entries)
1499                         return -EINVAL;
1500
1501                 size = memparse(p + 1, &p);
1502
1503                 if (!size)
1504                         return -EINVAL;
1505
1506                 paddr = 0;
1507
1508                 if (*p == '@') {
1509                         paddr = simple_strtoul(p + 1, &p, 16);
1510
1511                         if (!paddr)
1512                                 return -EINVAL;
1513
1514                 }
1515
1516                 WARN_ONCE(paddr,
1517                         "reserving memory at predefined address not supported\n");
1518
1519                 paddrs[fbnum] = paddr;
1520                 sizes[fbnum] = size;
1521
1522                 if (*p == 0)
1523                         break;
1524
1525                 if (*p != ',')
1526                         return -EINVAL;
1527
1528                 ++p;
1529
1530                 start = p;
1531         }
1532
1533         return 0;
1534 }
1535
1536 static int omapfb_allocate_all_fbs(struct omapfb2_device *fbdev)
1537 {
1538         int i, r;
1539         unsigned long vram_sizes[10];
1540         unsigned long vram_paddrs[10];
1541
1542         memset(&vram_sizes, 0, sizeof(vram_sizes));
1543         memset(&vram_paddrs, 0, sizeof(vram_paddrs));
1544
1545         if (def_vram && omapfb_parse_vram_param(def_vram, 10,
1546                                 vram_sizes, vram_paddrs)) {
1547                 dev_err(fbdev->dev, "failed to parse vram parameter\n");
1548
1549                 memset(&vram_sizes, 0, sizeof(vram_sizes));
1550                 memset(&vram_paddrs, 0, sizeof(vram_paddrs));
1551         }
1552
1553         for (i = 0; i < fbdev->num_fbs; i++) {
1554                 /* allocate memory automatically only for fb0, or if
1555                  * excplicitly defined with vram or plat data option */
1556                 if (i == 0 || vram_sizes[i] != 0) {
1557                         r = omapfb_alloc_fbmem_display(fbdev->fbs[i],
1558                                         vram_sizes[i], vram_paddrs[i]);
1559
1560                         if (r)
1561                                 return r;
1562                 }
1563         }
1564
1565         for (i = 0; i < fbdev->num_fbs; i++) {
1566                 struct omapfb_info *ofbi = FB2OFB(fbdev->fbs[i]);
1567                 struct omapfb2_mem_region *rg;
1568                 rg = ofbi->region;
1569
1570                 DBG("region%d phys %08x virt %p size=%lu\n",
1571                                 i,
1572                                 rg->paddr,
1573                                 rg->vaddr,
1574                                 rg->size);
1575         }
1576
1577         return 0;
1578 }
1579
1580 static void omapfb_clear_fb(struct fb_info *fbi)
1581 {
1582         const struct fb_fillrect rect = {
1583                 .dx = 0,
1584                 .dy = 0,
1585                 .width = fbi->var.xres_virtual,
1586                 .height = fbi->var.yres_virtual,
1587                 .color = 0,
1588                 .rop = ROP_COPY,
1589         };
1590
1591         cfb_fillrect(fbi, &rect);
1592 }
1593
1594 int omapfb_realloc_fbmem(struct fb_info *fbi, unsigned long size, int type)
1595 {
1596         struct omapfb_info *ofbi = FB2OFB(fbi);
1597         struct omapfb2_device *fbdev = ofbi->fbdev;
1598         struct omapfb2_mem_region *rg = ofbi->region;
1599         unsigned long old_size = rg->size;
1600         unsigned long old_paddr = rg->paddr;
1601         int old_type = rg->type;
1602         int r;
1603
1604         if (type != OMAPFB_MEMTYPE_SDRAM)
1605                 return -EINVAL;
1606
1607         size = PAGE_ALIGN(size);
1608
1609         if (old_size == size && old_type == type)
1610                 return 0;
1611
1612         omapfb_free_fbmem(fbi);
1613
1614         if (size == 0) {
1615                 clear_fb_info(fbi);
1616                 return 0;
1617         }
1618
1619         r = omapfb_alloc_fbmem(fbi, size, 0);
1620
1621         if (r) {
1622                 if (old_size)
1623                         omapfb_alloc_fbmem(fbi, old_size, old_paddr);
1624
1625                 if (rg->size == 0)
1626                         clear_fb_info(fbi);
1627
1628                 return r;
1629         }
1630
1631         if (old_size == size)
1632                 return 0;
1633
1634         if (old_size == 0) {
1635                 DBG("initializing fb %d\n", ofbi->id);
1636                 r = omapfb_fb_init(fbdev, fbi);
1637                 if (r) {
1638                         DBG("omapfb_fb_init failed\n");
1639                         goto err;
1640                 }
1641                 r = omapfb_apply_changes(fbi, 1);
1642                 if (r) {
1643                         DBG("omapfb_apply_changes failed\n");
1644                         goto err;
1645                 }
1646         } else {
1647                 struct fb_var_screeninfo new_var;
1648                 memcpy(&new_var, &fbi->var, sizeof(new_var));
1649                 r = check_fb_var(fbi, &new_var);
1650                 if (r)
1651                         goto err;
1652                 memcpy(&fbi->var, &new_var, sizeof(fbi->var));
1653                 set_fb_fix(fbi);
1654                 r = setup_vrfb_rotation(fbi);
1655                 if (r)
1656                         goto err;
1657         }
1658
1659         omapfb_clear_fb(fbi);
1660
1661         return 0;
1662 err:
1663         omapfb_free_fbmem(fbi);
1664         clear_fb_info(fbi);
1665         return r;
1666 }
1667
1668 static void omapfb_auto_update_work(struct work_struct *work)
1669 {
1670         struct omap_dss_device *dssdev;
1671         struct omap_dss_driver *dssdrv;
1672         struct omapfb_display_data *d;
1673         u16 w, h;
1674         unsigned int freq;
1675         struct omapfb2_device *fbdev;
1676
1677         d = container_of(work, struct omapfb_display_data,
1678                         auto_update_work.work);
1679
1680         dssdev = d->dssdev;
1681         dssdrv = dssdev->driver;
1682         fbdev = d->fbdev;
1683
1684         if (!dssdrv || !dssdrv->update)
1685                 return;
1686
1687         if (dssdrv->sync)
1688                 dssdrv->sync(dssdev);
1689
1690         dssdrv->get_resolution(dssdev, &w, &h);
1691         dssdrv->update(dssdev, 0, 0, w, h);
1692
1693         freq = auto_update_freq;
1694         if (freq == 0)
1695                 freq = 20;
1696         queue_delayed_work(fbdev->auto_update_wq,
1697                         &d->auto_update_work, HZ / freq);
1698 }
1699
1700 void omapfb_start_auto_update(struct omapfb2_device *fbdev,
1701                 struct omap_dss_device *display)
1702 {
1703         struct omapfb_display_data *d;
1704
1705         if (fbdev->auto_update_wq == NULL) {
1706                 struct workqueue_struct *wq;
1707
1708                 wq = create_singlethread_workqueue("omapfb_auto_update");
1709
1710                 if (wq == NULL) {
1711                         dev_err(fbdev->dev, "Failed to create workqueue for "
1712                                         "auto-update\n");
1713                         return;
1714                 }
1715
1716                 fbdev->auto_update_wq = wq;
1717         }
1718
1719         d = get_display_data(fbdev, display);
1720
1721         INIT_DELAYED_WORK(&d->auto_update_work, omapfb_auto_update_work);
1722
1723         d->auto_update_work_enabled = true;
1724
1725         omapfb_auto_update_work(&d->auto_update_work.work);
1726 }
1727
1728 void omapfb_stop_auto_update(struct omapfb2_device *fbdev,
1729                 struct omap_dss_device *display)
1730 {
1731         struct omapfb_display_data *d;
1732
1733         d = get_display_data(fbdev, display);
1734
1735         cancel_delayed_work_sync(&d->auto_update_work);
1736
1737         d->auto_update_work_enabled = false;
1738 }
1739
1740 /* initialize fb_info, var, fix to something sane based on the display */
1741 static int omapfb_fb_init(struct omapfb2_device *fbdev, struct fb_info *fbi)
1742 {
1743         struct fb_var_screeninfo *var = &fbi->var;
1744         struct omap_dss_device *display = fb2display(fbi);
1745         struct omapfb_info *ofbi = FB2OFB(fbi);
1746         int r = 0;
1747
1748         fbi->fbops = &omapfb_ops;
1749         fbi->flags = FBINFO_FLAG_DEFAULT;
1750         fbi->pseudo_palette = fbdev->pseudo_palette;
1751
1752         if (ofbi->region->size == 0) {
1753                 clear_fb_info(fbi);
1754                 return 0;
1755         }
1756
1757         var->nonstd = 0;
1758         var->bits_per_pixel = 0;
1759
1760         var->rotate = def_rotate;
1761
1762         if (display) {
1763                 u16 w, h;
1764                 int rotation = (var->rotate + ofbi->rotation[0]) % 4;
1765
1766                 display->driver->get_resolution(display, &w, &h);
1767
1768                 if (rotation == FB_ROTATE_CW ||
1769                                 rotation == FB_ROTATE_CCW) {
1770                         var->xres = h;
1771                         var->yres = w;
1772                 } else {
1773                         var->xres = w;
1774                         var->yres = h;
1775                 }
1776
1777                 var->xres_virtual = var->xres;
1778                 var->yres_virtual = var->yres;
1779
1780                 if (!var->bits_per_pixel) {
1781                         switch (omapfb_get_recommended_bpp(fbdev, display)) {
1782                         case 16:
1783                                 var->bits_per_pixel = 16;
1784                                 break;
1785                         case 24:
1786                                 var->bits_per_pixel = 32;
1787                                 break;
1788                         default:
1789                                 dev_err(fbdev->dev, "illegal display "
1790                                                 "bpp\n");
1791                                 return -EINVAL;
1792                         }
1793                 }
1794         } else {
1795                 /* if there's no display, let's just guess some basic values */
1796                 var->xres = 320;
1797                 var->yres = 240;
1798                 var->xres_virtual = var->xres;
1799                 var->yres_virtual = var->yres;
1800                 if (!var->bits_per_pixel)
1801                         var->bits_per_pixel = 16;
1802         }
1803
1804         r = check_fb_var(fbi, var);
1805         if (r)
1806                 goto err;
1807
1808         set_fb_fix(fbi);
1809         r = setup_vrfb_rotation(fbi);
1810         if (r)
1811                 goto err;
1812
1813         r = fb_alloc_cmap(&fbi->cmap, 256, 0);
1814         if (r)
1815                 dev_err(fbdev->dev, "unable to allocate color map memory\n");
1816
1817 err:
1818         return r;
1819 }
1820
1821 static void fbinfo_cleanup(struct omapfb2_device *fbdev, struct fb_info *fbi)
1822 {
1823         fb_dealloc_cmap(&fbi->cmap);
1824 }
1825
1826
1827 static void omapfb_free_resources(struct omapfb2_device *fbdev)
1828 {
1829         int i;
1830
1831         DBG("free_resources\n");
1832
1833         if (fbdev == NULL)
1834                 return;
1835
1836         for (i = 0; i < fbdev->num_overlays; i++) {
1837                 struct omap_overlay *ovl = fbdev->overlays[i];
1838
1839                 ovl->disable(ovl);
1840
1841                 if (ovl->manager)
1842                         ovl->unset_manager(ovl);
1843         }
1844
1845         for (i = 0; i < fbdev->num_fbs; i++)
1846                 unregister_framebuffer(fbdev->fbs[i]);
1847
1848         /* free the reserved fbmem */
1849         omapfb_free_all_fbmem(fbdev);
1850
1851         for (i = 0; i < fbdev->num_fbs; i++) {
1852                 fbinfo_cleanup(fbdev, fbdev->fbs[i]);
1853                 framebuffer_release(fbdev->fbs[i]);
1854         }
1855
1856         for (i = 0; i < fbdev->num_displays; i++) {
1857                 struct omap_dss_device *dssdev = fbdev->displays[i].dssdev;
1858
1859                 if (fbdev->displays[i].auto_update_work_enabled)
1860                         omapfb_stop_auto_update(fbdev, dssdev);
1861
1862                 if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)
1863                         dssdev->driver->disable(dssdev);
1864
1865                 dssdev->driver->disconnect(dssdev);
1866
1867                 omap_dss_put_device(dssdev);
1868         }
1869
1870         if (fbdev->auto_update_wq != NULL) {
1871                 flush_workqueue(fbdev->auto_update_wq);
1872                 destroy_workqueue(fbdev->auto_update_wq);
1873                 fbdev->auto_update_wq = NULL;
1874         }
1875
1876         dev_set_drvdata(fbdev->dev, NULL);
1877 }
1878
1879 static int omapfb_create_framebuffers(struct omapfb2_device *fbdev)
1880 {
1881         int r, i;
1882
1883         fbdev->num_fbs = 0;
1884
1885         DBG("create %d framebuffers\n", CONFIG_FB_OMAP2_NUM_FBS);
1886
1887         /* allocate fb_infos */
1888         for (i = 0; i < CONFIG_FB_OMAP2_NUM_FBS; i++) {
1889                 struct fb_info *fbi;
1890                 struct omapfb_info *ofbi;
1891
1892                 fbi = framebuffer_alloc(sizeof(struct omapfb_info),
1893                                 fbdev->dev);
1894
1895                 if (fbi == NULL) {
1896                         dev_err(fbdev->dev,
1897                                 "unable to allocate memory for plane info\n");
1898                         return -ENOMEM;
1899                 }
1900
1901                 clear_fb_info(fbi);
1902
1903                 fbdev->fbs[i] = fbi;
1904
1905                 ofbi = FB2OFB(fbi);
1906                 ofbi->fbdev = fbdev;
1907                 ofbi->id = i;
1908
1909                 ofbi->region = &fbdev->regions[i];
1910                 ofbi->region->id = i;
1911                 init_rwsem(&ofbi->region->lock);
1912
1913                 /* assign these early, so that fb alloc can use them */
1914                 ofbi->rotation_type = def_vrfb ? OMAP_DSS_ROT_VRFB :
1915                         OMAP_DSS_ROT_DMA;
1916                 ofbi->mirror = def_mirror;
1917
1918                 fbdev->num_fbs++;
1919         }
1920
1921         DBG("fb_infos allocated\n");
1922
1923         /* assign overlays for the fbs */
1924         for (i = 0; i < min(fbdev->num_fbs, fbdev->num_overlays); i++) {
1925                 struct omapfb_info *ofbi = FB2OFB(fbdev->fbs[i]);
1926
1927                 ofbi->overlays[0] = fbdev->overlays[i];
1928                 ofbi->num_overlays = 1;
1929         }
1930
1931         /* allocate fb memories */
1932         r = omapfb_allocate_all_fbs(fbdev);
1933         if (r) {
1934                 dev_err(fbdev->dev, "failed to allocate fbmem\n");
1935                 return r;
1936         }
1937
1938         DBG("fbmems allocated\n");
1939
1940         /* setup fb_infos */
1941         for (i = 0; i < fbdev->num_fbs; i++) {
1942                 struct fb_info *fbi = fbdev->fbs[i];
1943                 struct omapfb_info *ofbi = FB2OFB(fbi);
1944
1945                 omapfb_get_mem_region(ofbi->region);
1946                 r = omapfb_fb_init(fbdev, fbi);
1947                 omapfb_put_mem_region(ofbi->region);
1948
1949                 if (r) {
1950                         dev_err(fbdev->dev, "failed to setup fb_info\n");
1951                         return r;
1952                 }
1953         }
1954
1955         for (i = 0; i < fbdev->num_fbs; i++) {
1956                 struct fb_info *fbi = fbdev->fbs[i];
1957                 struct omapfb_info *ofbi = FB2OFB(fbi);
1958
1959                 if (ofbi->region->size == 0)
1960                         continue;
1961
1962                 omapfb_clear_fb(fbi);
1963         }
1964
1965         DBG("fb_infos initialized\n");
1966
1967         for (i = 0; i < fbdev->num_fbs; i++) {
1968                 r = register_framebuffer(fbdev->fbs[i]);
1969                 if (r != 0) {
1970                         dev_err(fbdev->dev,
1971                                 "registering framebuffer %d failed\n", i);
1972                         return r;
1973                 }
1974         }
1975
1976         DBG("framebuffers registered\n");
1977
1978         for (i = 0; i < fbdev->num_fbs; i++) {
1979                 struct fb_info *fbi = fbdev->fbs[i];
1980                 struct omapfb_info *ofbi = FB2OFB(fbi);
1981
1982                 omapfb_get_mem_region(ofbi->region);
1983                 r = omapfb_apply_changes(fbi, 1);
1984                 omapfb_put_mem_region(ofbi->region);
1985
1986                 if (r) {
1987                         dev_err(fbdev->dev, "failed to change mode\n");
1988                         return r;
1989                 }
1990         }
1991
1992         /* Enable fb0 */
1993         if (fbdev->num_fbs > 0) {
1994                 struct omapfb_info *ofbi = FB2OFB(fbdev->fbs[0]);
1995
1996                 if (ofbi->num_overlays > 0) {
1997                         struct omap_overlay *ovl = ofbi->overlays[0];
1998
1999                         ovl->manager->apply(ovl->manager);
2000
2001                         r = omapfb_overlay_enable(ovl, 1);
2002
2003                         if (r) {
2004                                 dev_err(fbdev->dev,
2005                                                 "failed to enable overlay\n");
2006                                 return r;
2007                         }
2008                 }
2009         }
2010
2011         DBG("create_framebuffers done\n");
2012
2013         return 0;
2014 }
2015
2016 static int omapfb_mode_to_timings(const char *mode_str,
2017                 struct omap_dss_device *display,
2018                 struct omap_video_timings *timings, u8 *bpp)
2019 {
2020         struct fb_info *fbi;
2021         struct fb_var_screeninfo *var;
2022         struct fb_ops *fbops;
2023         int r;
2024
2025 #ifdef CONFIG_OMAP2_DSS_VENC
2026         if (strcmp(mode_str, "pal") == 0) {
2027                 *timings = omap_dss_pal_timings;
2028                 *bpp = 24;
2029                 return 0;
2030         } else if (strcmp(mode_str, "ntsc") == 0) {
2031                 *timings = omap_dss_ntsc_timings;
2032                 *bpp = 24;
2033                 return 0;
2034         }
2035 #endif
2036
2037         /* this is quite a hack, but I wanted to use the modedb and for
2038          * that we need fb_info and var, so we create dummy ones */
2039
2040         *bpp = 0;
2041         fbi = NULL;
2042         var = NULL;
2043         fbops = NULL;
2044
2045         fbi = kzalloc(sizeof(*fbi), GFP_KERNEL);
2046         if (fbi == NULL) {
2047                 r = -ENOMEM;
2048                 goto err;
2049         }
2050
2051         var = kzalloc(sizeof(*var), GFP_KERNEL);
2052         if (var == NULL) {
2053                 r = -ENOMEM;
2054                 goto err;
2055         }
2056
2057         fbops = kzalloc(sizeof(*fbops), GFP_KERNEL);
2058         if (fbops == NULL) {
2059                 r = -ENOMEM;
2060                 goto err;
2061         }
2062
2063         fbi->fbops = fbops;
2064
2065         r = fb_find_mode(var, fbi, mode_str, NULL, 0, NULL, 24);
2066         if (r == 0) {
2067                 r = -EINVAL;
2068                 goto err;
2069         }
2070
2071         if (display->driver->get_timings) {
2072                 display->driver->get_timings(display, timings);
2073         } else {
2074                 timings->data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
2075                 timings->de_level = OMAPDSS_SIG_ACTIVE_HIGH;
2076                 timings->sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE;
2077         }
2078
2079         timings->pixelclock = PICOS2KHZ(var->pixclock) * 1000;
2080         timings->hbp = var->left_margin;
2081         timings->hfp = var->right_margin;
2082         timings->vbp = var->upper_margin;
2083         timings->vfp = var->lower_margin;
2084         timings->hsw = var->hsync_len;
2085         timings->vsw = var->vsync_len;
2086         timings->x_res = var->xres;
2087         timings->y_res = var->yres;
2088         timings->hsync_level = var->sync & FB_SYNC_HOR_HIGH_ACT ?
2089                                 OMAPDSS_SIG_ACTIVE_HIGH :
2090                                 OMAPDSS_SIG_ACTIVE_LOW;
2091         timings->vsync_level = var->sync & FB_SYNC_VERT_HIGH_ACT ?
2092                                 OMAPDSS_SIG_ACTIVE_HIGH :
2093                                 OMAPDSS_SIG_ACTIVE_LOW;
2094         timings->interlace = var->vmode & FB_VMODE_INTERLACED;
2095
2096         switch (var->bits_per_pixel) {
2097         case 16:
2098                 *bpp = 16;
2099                 break;
2100         case 24:
2101         case 32:
2102         default:
2103                 *bpp = 24;
2104                 break;
2105         }
2106
2107         r = 0;
2108
2109 err:
2110         kfree(fbi);
2111         kfree(var);
2112         kfree(fbops);
2113
2114         return r;
2115 }
2116
2117 static int omapfb_set_def_mode(struct omapfb2_device *fbdev,
2118                 struct omap_dss_device *display, char *mode_str)
2119 {
2120         int r;
2121         u8 bpp;
2122         struct omap_video_timings timings, temp_timings;
2123         struct omapfb_display_data *d;
2124
2125         r = omapfb_mode_to_timings(mode_str, display, &timings, &bpp);
2126         if (r)
2127                 return r;
2128
2129         d = get_display_data(fbdev, display);
2130         d->bpp_override = bpp;
2131
2132         if (display->driver->check_timings) {
2133                 r = display->driver->check_timings(display, &timings);
2134                 if (r)
2135                         return r;
2136         } else {
2137                 /* If check_timings is not present compare xres and yres */
2138                 if (display->driver->get_timings) {
2139                         display->driver->get_timings(display, &temp_timings);
2140
2141                         if (temp_timings.x_res != timings.x_res ||
2142                                 temp_timings.y_res != timings.y_res)
2143                                 return -EINVAL;
2144                 }
2145         }
2146
2147         if (display->driver->set_timings)
2148                         display->driver->set_timings(display, &timings);
2149
2150         return 0;
2151 }
2152
2153 static int omapfb_get_recommended_bpp(struct omapfb2_device *fbdev,
2154                 struct omap_dss_device *dssdev)
2155 {
2156         struct omapfb_display_data *d;
2157
2158         BUG_ON(dssdev->driver->get_recommended_bpp == NULL);
2159
2160         d = get_display_data(fbdev, dssdev);
2161
2162         if (d->bpp_override != 0)
2163                 return d->bpp_override;
2164
2165         return dssdev->driver->get_recommended_bpp(dssdev);
2166 }
2167
2168 static int omapfb_parse_def_modes(struct omapfb2_device *fbdev)
2169 {
2170         char *str, *options, *this_opt;
2171         int r = 0;
2172
2173         str = kstrdup(def_mode, GFP_KERNEL);
2174         if (!str)
2175                 return -ENOMEM;
2176         options = str;
2177
2178         while (!r && (this_opt = strsep(&options, ",")) != NULL) {
2179                 char *p, *display_str, *mode_str;
2180                 struct omap_dss_device *display;
2181                 int i;
2182
2183                 p = strchr(this_opt, ':');
2184                 if (!p) {
2185                         r = -EINVAL;
2186                         break;
2187                 }
2188
2189                 *p = 0;
2190                 display_str = this_opt;
2191                 mode_str = p + 1;
2192
2193                 display = NULL;
2194                 for (i = 0; i < fbdev->num_displays; ++i) {
2195                         if (strcmp(fbdev->displays[i].dssdev->name,
2196                                                 display_str) == 0) {
2197                                 display = fbdev->displays[i].dssdev;
2198                                 break;
2199                         }
2200                 }
2201
2202                 if (!display) {
2203                         r = -EINVAL;
2204                         break;
2205                 }
2206
2207                 r = omapfb_set_def_mode(fbdev, display, mode_str);
2208                 if (r)
2209                         break;
2210         }
2211
2212         kfree(str);
2213
2214         return r;
2215 }
2216
2217 static void fb_videomode_to_omap_timings(struct fb_videomode *m,
2218                 struct omap_dss_device *display,
2219                 struct omap_video_timings *t)
2220 {
2221         if (display->driver->get_timings) {
2222                 display->driver->get_timings(display, t);
2223         } else {
2224                 t->data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
2225                 t->de_level = OMAPDSS_SIG_ACTIVE_HIGH;
2226                 t->sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE;
2227         }
2228
2229         t->x_res = m->xres;
2230         t->y_res = m->yres;
2231         t->pixelclock = PICOS2KHZ(m->pixclock) * 1000;
2232         t->hsw = m->hsync_len;
2233         t->hfp = m->right_margin;
2234         t->hbp = m->left_margin;
2235         t->vsw = m->vsync_len;
2236         t->vfp = m->lower_margin;
2237         t->vbp = m->upper_margin;
2238         t->hsync_level = m->sync & FB_SYNC_HOR_HIGH_ACT ?
2239                                 OMAPDSS_SIG_ACTIVE_HIGH :
2240                                 OMAPDSS_SIG_ACTIVE_LOW;
2241         t->vsync_level = m->sync & FB_SYNC_VERT_HIGH_ACT ?
2242                                 OMAPDSS_SIG_ACTIVE_HIGH :
2243                                 OMAPDSS_SIG_ACTIVE_LOW;
2244         t->interlace = m->vmode & FB_VMODE_INTERLACED;
2245 }
2246
2247 static int omapfb_find_best_mode(struct omap_dss_device *display,
2248                 struct omap_video_timings *timings)
2249 {
2250         struct fb_monspecs *specs;
2251         u8 *edid;
2252         int r, i, best_idx, len;
2253
2254         if (!display->driver->read_edid)
2255                 return -ENODEV;
2256
2257         len = 0x80 * 2;
2258         edid = kmalloc(len, GFP_KERNEL);
2259         if (edid == NULL)
2260                 return -ENOMEM;
2261
2262         r = display->driver->read_edid(display, edid, len);
2263         if (r < 0)
2264                 goto err1;
2265
2266         specs = kzalloc(sizeof(*specs), GFP_KERNEL);
2267         if (specs == NULL) {
2268                 r = -ENOMEM;
2269                 goto err1;
2270         }
2271
2272         fb_edid_to_monspecs(edid, specs);
2273
2274         best_idx = -1;
2275
2276         for (i = 0; i < specs->modedb_len; ++i) {
2277                 struct fb_videomode *m;
2278                 struct omap_video_timings t;
2279
2280                 m = &specs->modedb[i];
2281
2282                 if (m->pixclock == 0)
2283                         continue;
2284
2285                 /* skip repeated pixel modes */
2286                 if (m->xres == 2880 || m->xres == 1440)
2287                         continue;
2288
2289                 if (m->vmode & FB_VMODE_INTERLACED ||
2290                                 m->vmode & FB_VMODE_DOUBLE)
2291                         continue;
2292
2293                 fb_videomode_to_omap_timings(m, display, &t);
2294
2295                 r = display->driver->check_timings(display, &t);
2296                 if (r == 0) {
2297                         best_idx = i;
2298                         break;
2299                 }
2300         }
2301
2302         if (best_idx == -1) {
2303                 r = -ENOENT;
2304                 goto err2;
2305         }
2306
2307         fb_videomode_to_omap_timings(&specs->modedb[best_idx], display,
2308                 timings);
2309
2310         r = 0;
2311
2312 err2:
2313         fb_destroy_modedb(specs->modedb);
2314         kfree(specs);
2315 err1:
2316         kfree(edid);
2317
2318         return r;
2319 }
2320
2321 static int omapfb_init_display(struct omapfb2_device *fbdev,
2322                 struct omap_dss_device *dssdev)
2323 {
2324         struct omap_dss_driver *dssdrv = dssdev->driver;
2325         struct omapfb_display_data *d;
2326         int r;
2327
2328         r = dssdrv->enable(dssdev);
2329         if (r) {
2330                 dev_warn(fbdev->dev, "Failed to enable display '%s'\n",
2331                                 dssdev->name);
2332                 return r;
2333         }
2334
2335         d = get_display_data(fbdev, dssdev);
2336
2337         d->fbdev = fbdev;
2338
2339         if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) {
2340                 u16 w, h;
2341
2342                 if (auto_update) {
2343                         omapfb_start_auto_update(fbdev, dssdev);
2344                         d->update_mode = OMAPFB_AUTO_UPDATE;
2345                 } else {
2346                         d->update_mode = OMAPFB_MANUAL_UPDATE;
2347                 }
2348
2349                 if (dssdrv->enable_te) {
2350                         r = dssdrv->enable_te(dssdev, 1);
2351                         if (r) {
2352                                 dev_err(fbdev->dev, "Failed to set TE\n");
2353                                 return r;
2354                         }
2355                 }
2356
2357                 dssdrv->get_resolution(dssdev, &w, &h);
2358                 r = dssdrv->update(dssdev, 0, 0, w, h);
2359                 if (r) {
2360                         dev_err(fbdev->dev,
2361                                         "Failed to update display\n");
2362                         return r;
2363                 }
2364         } else {
2365                 d->update_mode = OMAPFB_AUTO_UPDATE;
2366         }
2367
2368         return 0;
2369 }
2370
2371 static int omapfb_init_connections(struct omapfb2_device *fbdev,
2372                 struct omap_dss_device *def_dssdev)
2373 {
2374         int i, r;
2375         struct omap_overlay_manager *mgr;
2376
2377         r = def_dssdev->driver->connect(def_dssdev);
2378         if (r) {
2379                 dev_err(fbdev->dev, "failed to connect default display\n");
2380                 return r;
2381         }
2382
2383         for (i = 0; i < fbdev->num_displays; ++i) {
2384                 struct omap_dss_device *dssdev = fbdev->displays[i].dssdev;
2385
2386                 if (dssdev == def_dssdev)
2387                         continue;
2388
2389                 /*
2390                  * We don't care if the connect succeeds or not. We just want to
2391                  * connect as many displays as possible.
2392                  */
2393                 dssdev->driver->connect(dssdev);
2394         }
2395
2396         mgr = omapdss_find_mgr_from_display(def_dssdev);
2397
2398         if (!mgr) {
2399                 dev_err(fbdev->dev, "no ovl manager for the default display\n");
2400                 return -EINVAL;
2401         }
2402
2403         for (i = 0; i < fbdev->num_overlays; i++) {
2404                 struct omap_overlay *ovl = fbdev->overlays[i];
2405
2406                 if (ovl->manager)
2407                         ovl->unset_manager(ovl);
2408
2409                 r = ovl->set_manager(ovl, mgr);
2410                 if (r)
2411                         dev_warn(fbdev->dev,
2412                                         "failed to connect overlay %s to manager %s\n",
2413                                         ovl->name, mgr->name);
2414         }
2415
2416         return 0;
2417 }
2418
2419 static struct omap_dss_device *
2420 omapfb_find_default_display(struct omapfb2_device *fbdev)
2421 {
2422         const char *def_name;
2423         int i;
2424
2425         /*
2426          * Search with the display name from the user or the board file,
2427          * comparing to display names and aliases
2428          */
2429
2430         def_name = omapdss_get_default_display_name();
2431
2432         if (def_name) {
2433                 for (i = 0; i < fbdev->num_displays; ++i) {
2434                         struct omap_dss_device *dssdev;
2435
2436                         dssdev = fbdev->displays[i].dssdev;
2437
2438                         if (dssdev->name && strcmp(def_name, dssdev->name) == 0)
2439                                 return dssdev;
2440
2441                         if (strcmp(def_name, dssdev->alias) == 0)
2442                                 return dssdev;
2443                 }
2444
2445                 /* def_name given but not found */
2446                 return NULL;
2447         }
2448
2449         /* then look for DT alias display0 */
2450         for (i = 0; i < fbdev->num_displays; ++i) {
2451                 struct omap_dss_device *dssdev;
2452                 int id;
2453
2454                 dssdev = fbdev->displays[i].dssdev;
2455
2456                 if (dssdev->dev->of_node == NULL)
2457                         continue;
2458
2459                 id = of_alias_get_id(dssdev->dev->of_node, "display");
2460                 if (id == 0)
2461                         return dssdev;
2462         }
2463
2464         /* return the first display we have in the list */
2465         return fbdev->displays[0].dssdev;
2466 }
2467
2468 static int omapfb_probe(struct platform_device *pdev)
2469 {
2470         struct omapfb2_device *fbdev = NULL;
2471         int r = 0;
2472         int i;
2473         struct omap_dss_device *def_display;
2474         struct omap_dss_device *dssdev;
2475
2476         DBG("omapfb_probe\n");
2477
2478         if (omapdss_is_initialized() == false)
2479                 return -EPROBE_DEFER;
2480
2481         if (pdev->num_resources != 0) {
2482                 dev_err(&pdev->dev, "probed for an unknown device\n");
2483                 r = -ENODEV;
2484                 goto err0;
2485         }
2486
2487         fbdev = devm_kzalloc(&pdev->dev, sizeof(struct omapfb2_device),
2488                         GFP_KERNEL);
2489         if (fbdev == NULL) {
2490                 r = -ENOMEM;
2491                 goto err0;
2492         }
2493
2494         if (def_vrfb && !omap_vrfb_supported()) {
2495                 def_vrfb = 0;
2496                 dev_warn(&pdev->dev, "VRFB is not supported on this hardware, "
2497                                 "ignoring the module parameter vrfb=y\n");
2498         }
2499
2500         r = omapdss_compat_init();
2501         if (r)
2502                 goto err0;
2503
2504         mutex_init(&fbdev->mtx);
2505
2506         fbdev->dev = &pdev->dev;
2507         platform_set_drvdata(pdev, fbdev);
2508
2509         fbdev->num_displays = 0;
2510         dssdev = NULL;
2511         for_each_dss_dev(dssdev) {
2512                 struct omapfb_display_data *d;
2513
2514                 omap_dss_get_device(dssdev);
2515
2516                 if (!dssdev->driver) {
2517                         dev_warn(&pdev->dev, "no driver for display: %s\n",
2518                                 dssdev->name);
2519                         omap_dss_put_device(dssdev);
2520                         continue;
2521                 }
2522
2523                 d = &fbdev->displays[fbdev->num_displays++];
2524                 d->dssdev = dssdev;
2525                 if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE)
2526                         d->update_mode = OMAPFB_MANUAL_UPDATE;
2527                 else
2528                         d->update_mode = OMAPFB_AUTO_UPDATE;
2529         }
2530
2531         if (fbdev->num_displays == 0) {
2532                 dev_err(&pdev->dev, "no displays\n");
2533                 r = -EPROBE_DEFER;
2534                 goto cleanup;
2535         }
2536
2537         fbdev->num_overlays = omap_dss_get_num_overlays();
2538         for (i = 0; i < fbdev->num_overlays; i++)
2539                 fbdev->overlays[i] = omap_dss_get_overlay(i);
2540
2541         fbdev->num_managers = omap_dss_get_num_overlay_managers();
2542         for (i = 0; i < fbdev->num_managers; i++)
2543                 fbdev->managers[i] = omap_dss_get_overlay_manager(i);
2544
2545         def_display = omapfb_find_default_display(fbdev);
2546         if (def_display == NULL) {
2547                 dev_err(fbdev->dev, "failed to find default display\n");
2548                 r = -EPROBE_DEFER;
2549                 goto cleanup;
2550         }
2551
2552         r = omapfb_init_connections(fbdev, def_display);
2553         if (r) {
2554                 dev_err(fbdev->dev, "failed to init overlay connections\n");
2555                 goto cleanup;
2556         }
2557
2558         if (def_mode && strlen(def_mode) > 0) {
2559                 if (omapfb_parse_def_modes(fbdev))
2560                         dev_warn(&pdev->dev, "cannot parse default modes\n");
2561         } else if (def_display && def_display->driver->set_timings &&
2562                         def_display->driver->check_timings) {
2563                 struct omap_video_timings t;
2564
2565                 r = omapfb_find_best_mode(def_display, &t);
2566
2567                 if (r == 0)
2568                         def_display->driver->set_timings(def_display, &t);
2569         }
2570
2571         r = omapfb_create_framebuffers(fbdev);
2572         if (r)
2573                 goto cleanup;
2574
2575         for (i = 0; i < fbdev->num_managers; i++) {
2576                 struct omap_overlay_manager *mgr;
2577                 mgr = fbdev->managers[i];
2578                 r = mgr->apply(mgr);
2579                 if (r)
2580                         dev_warn(fbdev->dev, "failed to apply dispc config\n");
2581         }
2582
2583         DBG("mgr->apply'ed\n");
2584
2585         if (def_display) {
2586                 r = omapfb_init_display(fbdev, def_display);
2587                 if (r) {
2588                         dev_err(fbdev->dev,
2589                                         "failed to initialize default "
2590                                         "display\n");
2591                         goto cleanup;
2592                 }
2593         }
2594
2595         DBG("create sysfs for fbs\n");
2596         r = omapfb_create_sysfs(fbdev);
2597         if (r) {
2598                 dev_err(fbdev->dev, "failed to create sysfs entries\n");
2599                 goto cleanup;
2600         }
2601
2602         if (def_display) {
2603                 u16 w, h;
2604
2605                 def_display->driver->get_resolution(def_display, &w, &h);
2606
2607                 dev_info(fbdev->dev, "using display '%s' mode %dx%d\n",
2608                         def_display->name, w, h);
2609         }
2610
2611         return 0;
2612
2613 cleanup:
2614         omapfb_free_resources(fbdev);
2615         omapdss_compat_uninit();
2616 err0:
2617         dev_err(&pdev->dev, "failed to setup omapfb\n");
2618         return r;
2619 }
2620
2621 static int omapfb_remove(struct platform_device *pdev)
2622 {
2623         struct omapfb2_device *fbdev = platform_get_drvdata(pdev);
2624
2625         /* FIXME: wait till completion of pending events */
2626
2627         omapfb_remove_sysfs(fbdev);
2628
2629         omapfb_free_resources(fbdev);
2630
2631         omapdss_compat_uninit();
2632
2633         return 0;
2634 }
2635
2636 static struct platform_driver omapfb_driver = {
2637         .probe          = omapfb_probe,
2638         .remove         = omapfb_remove,
2639         .driver         = {
2640                 .name   = "omapfb",
2641         },
2642 };
2643
2644 module_param_named(mode, def_mode, charp, 0);
2645 module_param_named(vram, def_vram, charp, 0);
2646 module_param_named(rotate, def_rotate, int, 0);
2647 module_param_named(vrfb, def_vrfb, bool, 0);
2648 module_param_named(mirror, def_mirror, bool, 0);
2649
2650 module_platform_driver(omapfb_driver);
2651
2652 MODULE_ALIAS("platform:omapfb");
2653 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
2654 MODULE_DESCRIPTION("OMAP2/3 Framebuffer");
2655 MODULE_LICENSE("GPL v2");