tun: Limit amount of queued packets per device
[linux-2.6] / drivers / video / fsl-diu-fb.c
1 /*
2  * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
3  *
4  *  Freescale DIU Frame Buffer device driver
5  *
6  *  Authors: Hongjun Chen <hong-jun.chen@freescale.com>
7  *           Paul Widmer <paul.widmer@freescale.com>
8  *           Srikanth Srinivasan <srikanth.srinivasan@freescale.com>
9  *           York Sun <yorksun@freescale.com>
10  *
11  *   Based on imxfb.c Copyright (C) 2004 S.Hauer, Pengutronix
12  *
13  * This program is free software; you can redistribute  it and/or modify it
14  * under  the terms of  the GNU General  Public License as published by the
15  * Free Software Foundation;  either version 2 of the  License, or (at your
16  * option) any later version.
17  *
18  */
19
20 #include <linux/module.h>
21 #include <linux/kernel.h>
22 #include <linux/errno.h>
23 #include <linux/string.h>
24 #include <linux/slab.h>
25 #include <linux/fb.h>
26 #include <linux/init.h>
27 #include <linux/dma-mapping.h>
28 #include <linux/platform_device.h>
29 #include <linux/interrupt.h>
30 #include <linux/clk.h>
31 #include <linux/uaccess.h>
32 #include <linux/vmalloc.h>
33
34 #include <linux/of_platform.h>
35
36 #include <sysdev/fsl_soc.h>
37 #include "fsl-diu-fb.h"
38
39 /*
40  * These parameters give default parameters
41  * for video output 1024x768,
42  * FIXME - change timing to proper amounts
43  * hsync 31.5kHz, vsync 60Hz
44  */
45 static struct fb_videomode __devinitdata fsl_diu_default_mode = {
46         .refresh        = 60,
47         .xres           = 1024,
48         .yres           = 768,
49         .pixclock       = 15385,
50         .left_margin    = 160,
51         .right_margin   = 24,
52         .upper_margin   = 29,
53         .lower_margin   = 3,
54         .hsync_len      = 136,
55         .vsync_len      = 6,
56         .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
57         .vmode          = FB_VMODE_NONINTERLACED
58 };
59
60 static struct fb_videomode __devinitdata fsl_diu_mode_db[] = {
61         {
62                 .name           = "1024x768-60",
63                 .refresh        = 60,
64                 .xres           = 1024,
65                 .yres           = 768,
66                 .pixclock       = 15385,
67                 .left_margin    = 160,
68                 .right_margin   = 24,
69                 .upper_margin   = 29,
70                 .lower_margin   = 3,
71                 .hsync_len      = 136,
72                 .vsync_len      = 6,
73                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
74                 .vmode          = FB_VMODE_NONINTERLACED
75         },
76         {
77                 .name           = "1024x768-70",
78                 .refresh        = 70,
79                 .xres           = 1024,
80                 .yres           = 768,
81                 .pixclock       = 16886,
82                 .left_margin    = 3,
83                 .right_margin   = 3,
84                 .upper_margin   = 2,
85                 .lower_margin   = 2,
86                 .hsync_len      = 40,
87                 .vsync_len      = 18,
88                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
89                 .vmode          = FB_VMODE_NONINTERLACED
90         },
91         {
92                 .name           = "1024x768-75",
93                 .refresh        = 75,
94                 .xres           = 1024,
95                 .yres           = 768,
96                 .pixclock       = 15009,
97                 .left_margin    = 3,
98                 .right_margin   = 3,
99                 .upper_margin   = 2,
100                 .lower_margin   = 2,
101                 .hsync_len      = 80,
102                 .vsync_len      = 32,
103                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
104                 .vmode          = FB_VMODE_NONINTERLACED
105         },
106         {
107                 .name           = "1280x1024-60",
108                 .refresh        = 60,
109                 .xres           = 1280,
110                 .yres           = 1024,
111                 .pixclock       = 9375,
112                 .left_margin    = 38,
113                 .right_margin   = 128,
114                 .upper_margin   = 2,
115                 .lower_margin   = 7,
116                 .hsync_len      = 216,
117                 .vsync_len      = 37,
118                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
119                 .vmode          = FB_VMODE_NONINTERLACED
120         },
121         {
122                 .name           = "1280x1024-70",
123                 .refresh        = 70,
124                 .xres           = 1280,
125                 .yres           = 1024,
126                 .pixclock       = 9380,
127                 .left_margin    = 6,
128                 .right_margin   = 6,
129                 .upper_margin   = 4,
130                 .lower_margin   = 4,
131                 .hsync_len      = 60,
132                 .vsync_len      = 94,
133                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
134                 .vmode          = FB_VMODE_NONINTERLACED
135         },
136         {
137                 .name           = "1280x1024-75",
138                 .refresh        = 75,
139                 .xres           = 1280,
140                 .yres           = 1024,
141                 .pixclock       = 9380,
142                 .left_margin    = 6,
143                 .right_margin   = 6,
144                 .upper_margin   = 4,
145                 .lower_margin   = 4,
146                 .hsync_len      = 60,
147                 .vsync_len      = 15,
148                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
149                 .vmode          = FB_VMODE_NONINTERLACED
150         },
151         {
152                 .name           = "320x240",            /* for AOI only */
153                 .refresh        = 60,
154                 .xres           = 320,
155                 .yres           = 240,
156                 .pixclock       = 15385,
157                 .left_margin    = 0,
158                 .right_margin   = 0,
159                 .upper_margin   = 0,
160                 .lower_margin   = 0,
161                 .hsync_len      = 0,
162                 .vsync_len      = 0,
163                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
164                 .vmode          = FB_VMODE_NONINTERLACED
165         },
166         {
167                 .name           = "1280x480-60",
168                 .refresh        = 60,
169                 .xres           = 1280,
170                 .yres           = 480,
171                 .pixclock       = 18939,
172                 .left_margin    = 353,
173                 .right_margin   = 47,
174                 .upper_margin   = 39,
175                 .lower_margin   = 4,
176                 .hsync_len      = 8,
177                 .vsync_len      = 2,
178                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
179                 .vmode          = FB_VMODE_NONINTERLACED
180         },
181 };
182
183 static char *fb_mode = "1024x768-32@60";
184 static unsigned long default_bpp = 32;
185 static int monitor_port;
186
187 #if defined(CONFIG_NOT_COHERENT_CACHE)
188 static u8 *coherence_data;
189 static size_t coherence_data_size;
190 static unsigned int d_cache_line_size;
191 #endif
192
193 static DEFINE_SPINLOCK(diu_lock);
194
195 struct fsl_diu_data {
196         struct fb_info *fsl_diu_info[FSL_AOI_NUM - 1];
197                                 /*FSL_AOI_NUM has one dummy AOI */
198         struct device_attribute dev_attr;
199         struct diu_ad *dummy_ad;
200         void *dummy_aoi_virt;
201         unsigned int irq;
202         int fb_enabled;
203         int monitor_port;
204 };
205
206 struct mfb_info {
207         int index;
208         int type;
209         char *id;
210         int registered;
211         int blank;
212         unsigned long pseudo_palette[16];
213         struct diu_ad *ad;
214         int cursor_reset;
215         unsigned char g_alpha;
216         unsigned int count;
217         int x_aoi_d;            /* aoi display x offset to physical screen */
218         int y_aoi_d;            /* aoi display y offset to physical screen */
219         struct fsl_diu_data *parent;
220 };
221
222
223 static struct mfb_info mfb_template[] = {
224         {               /* AOI 0 for plane 0 */
225         .index = 0,
226         .type = MFB_TYPE_OUTPUT,
227         .id = "Panel0",
228         .registered = 0,
229         .count = 0,
230         .x_aoi_d = 0,
231         .y_aoi_d = 0,
232         },
233         {               /* AOI 0 for plane 1 */
234         .index = 1,
235         .type = MFB_TYPE_OUTPUT,
236         .id = "Panel1 AOI0",
237         .registered = 0,
238         .g_alpha = 0xff,
239         .count = 0,
240         .x_aoi_d = 0,
241         .y_aoi_d = 0,
242         },
243         {               /* AOI 1 for plane 1 */
244         .index = 2,
245         .type = MFB_TYPE_OUTPUT,
246         .id = "Panel1 AOI1",
247         .registered = 0,
248         .g_alpha = 0xff,
249         .count = 0,
250         .x_aoi_d = 0,
251         .y_aoi_d = 480,
252         },
253         {               /* AOI 0 for plane 2 */
254         .index = 3,
255         .type = MFB_TYPE_OUTPUT,
256         .id = "Panel2 AOI0",
257         .registered = 0,
258         .g_alpha = 0xff,
259         .count = 0,
260         .x_aoi_d = 640,
261         .y_aoi_d = 0,
262         },
263         {               /* AOI 1 for plane 2 */
264         .index = 4,
265         .type = MFB_TYPE_OUTPUT,
266         .id = "Panel2 AOI1",
267         .registered = 0,
268         .g_alpha = 0xff,
269         .count = 0,
270         .x_aoi_d = 640,
271         .y_aoi_d = 480,
272         },
273 };
274
275 static struct diu_hw dr = {
276         .mode = MFB_MODE1,
277         .reg_lock = __SPIN_LOCK_UNLOCKED(diu_hw.reg_lock),
278 };
279
280 static struct diu_pool pool;
281
282 /**
283  * fsl_diu_alloc - allocate memory for the DIU
284  * @size: number of bytes to allocate
285  * @param: returned physical address of memory
286  *
287  * This function allocates a physically-contiguous block of memory.
288  */
289 static void *fsl_diu_alloc(size_t size, phys_addr_t *phys)
290 {
291         void *virt;
292
293         pr_debug("size=%zu\n", size);
294
295         virt = alloc_pages_exact(size, GFP_DMA | __GFP_ZERO);
296         if (virt) {
297                 *phys = virt_to_phys(virt);
298                 pr_debug("virt=%p phys=%llx\n", virt,
299                         (unsigned long long)*phys);
300         }
301
302         return virt;
303 }
304
305 /**
306  * fsl_diu_free - release DIU memory
307  * @virt: pointer returned by fsl_diu_alloc()
308  * @size: number of bytes allocated by fsl_diu_alloc()
309  *
310  * This function releases memory allocated by fsl_diu_alloc().
311  */
312 static void fsl_diu_free(void *virt, size_t size)
313 {
314         pr_debug("virt=%p size=%zu\n", virt, size);
315
316         if (virt && size)
317                 free_pages_exact(virt, size);
318 }
319
320 static int fsl_diu_enable_panel(struct fb_info *info)
321 {
322         struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
323         struct diu *hw = dr.diu_reg;
324         struct diu_ad *ad = mfbi->ad;
325         struct fsl_diu_data *machine_data = mfbi->parent;
326         int res = 0;
327
328         pr_debug("enable_panel index %d\n", mfbi->index);
329         if (mfbi->type != MFB_TYPE_OFF) {
330                 switch (mfbi->index) {
331                 case 0:                         /* plane 0 */
332                         if (hw->desc[0] != ad->paddr)
333                                 out_be32(&hw->desc[0], ad->paddr);
334                         break;
335                 case 1:                         /* plane 1 AOI 0 */
336                         cmfbi = machine_data->fsl_diu_info[2]->par;
337                         if (hw->desc[1] != ad->paddr) { /* AOI0 closed */
338                                 if (cmfbi->count > 0)   /* AOI1 open */
339                                         ad->next_ad =
340                                                 cpu_to_le32(cmfbi->ad->paddr);
341                                 else
342                                         ad->next_ad = 0;
343                                 out_be32(&hw->desc[1], ad->paddr);
344                         }
345                         break;
346                 case 3:                         /* plane 2 AOI 0 */
347                         cmfbi = machine_data->fsl_diu_info[4]->par;
348                         if (hw->desc[2] != ad->paddr) { /* AOI0 closed */
349                                 if (cmfbi->count > 0)   /* AOI1 open */
350                                         ad->next_ad =
351                                                 cpu_to_le32(cmfbi->ad->paddr);
352                                 else
353                                         ad->next_ad = 0;
354                                 out_be32(&hw->desc[2], ad->paddr);
355                         }
356                         break;
357                 case 2:                         /* plane 1 AOI 1 */
358                         pmfbi = machine_data->fsl_diu_info[1]->par;
359                         ad->next_ad = 0;
360                         if (hw->desc[1] == machine_data->dummy_ad->paddr)
361                                 out_be32(&hw->desc[1], ad->paddr);
362                         else                                    /* AOI0 open */
363                                 pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
364                         break;
365                 case 4:                         /* plane 2 AOI 1 */
366                         pmfbi = machine_data->fsl_diu_info[3]->par;
367                         ad->next_ad = 0;
368                         if (hw->desc[2] == machine_data->dummy_ad->paddr)
369                                 out_be32(&hw->desc[2], ad->paddr);
370                         else                            /* AOI0 was open */
371                                 pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
372                         break;
373                 default:
374                         res = -EINVAL;
375                         break;
376                 }
377         } else
378                 res = -EINVAL;
379         return res;
380 }
381
382 static int fsl_diu_disable_panel(struct fb_info *info)
383 {
384         struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
385         struct diu *hw = dr.diu_reg;
386         struct diu_ad *ad = mfbi->ad;
387         struct fsl_diu_data *machine_data = mfbi->parent;
388         int res = 0;
389
390         switch (mfbi->index) {
391         case 0:                                 /* plane 0 */
392                 if (hw->desc[0] != machine_data->dummy_ad->paddr)
393                         out_be32(&hw->desc[0],
394                                 machine_data->dummy_ad->paddr);
395                 break;
396         case 1:                                 /* plane 1 AOI 0 */
397                 cmfbi = machine_data->fsl_diu_info[2]->par;
398                 if (cmfbi->count > 0)   /* AOI1 is open */
399                         out_be32(&hw->desc[1], cmfbi->ad->paddr);
400                                         /* move AOI1 to the first */
401                 else                    /* AOI1 was closed */
402                         out_be32(&hw->desc[1],
403                                 machine_data->dummy_ad->paddr);
404                                         /* close AOI 0 */
405                 break;
406         case 3:                                 /* plane 2 AOI 0 */
407                 cmfbi = machine_data->fsl_diu_info[4]->par;
408                 if (cmfbi->count > 0)   /* AOI1 is open */
409                         out_be32(&hw->desc[2], cmfbi->ad->paddr);
410                                         /* move AOI1 to the first */
411                 else                    /* AOI1 was closed */
412                         out_be32(&hw->desc[2],
413                                 machine_data->dummy_ad->paddr);
414                                         /* close AOI 0 */
415                 break;
416         case 2:                                 /* plane 1 AOI 1 */
417                 pmfbi = machine_data->fsl_diu_info[1]->par;
418                 if (hw->desc[1] != ad->paddr) {
419                                 /* AOI1 is not the first in the chain */
420                         if (pmfbi->count > 0)
421                                         /* AOI0 is open, must be the first */
422                                 pmfbi->ad->next_ad = 0;
423                 } else                  /* AOI1 is the first in the chain */
424                         out_be32(&hw->desc[1], machine_data->dummy_ad->paddr);
425                                         /* close AOI 1 */
426                 break;
427         case 4:                                 /* plane 2 AOI 1 */
428                 pmfbi = machine_data->fsl_diu_info[3]->par;
429                 if (hw->desc[2] != ad->paddr) {
430                                 /* AOI1 is not the first in the chain */
431                         if (pmfbi->count > 0)
432                                 /* AOI0 is open, must be the first */
433                                 pmfbi->ad->next_ad = 0;
434                 } else          /* AOI1 is the first in the chain */
435                         out_be32(&hw->desc[2], machine_data->dummy_ad->paddr);
436                                 /* close AOI 1 */
437                 break;
438         default:
439                 res = -EINVAL;
440                 break;
441         }
442
443         return res;
444 }
445
446 static void enable_lcdc(struct fb_info *info)
447 {
448         struct diu *hw = dr.diu_reg;
449         struct mfb_info *mfbi = info->par;
450         struct fsl_diu_data *machine_data = mfbi->parent;
451
452         if (!machine_data->fb_enabled) {
453                 out_be32(&hw->diu_mode, dr.mode);
454                 machine_data->fb_enabled++;
455         }
456 }
457
458 static void disable_lcdc(struct fb_info *info)
459 {
460         struct diu *hw = dr.diu_reg;
461         struct mfb_info *mfbi = info->par;
462         struct fsl_diu_data *machine_data = mfbi->parent;
463
464         if (machine_data->fb_enabled) {
465                 out_be32(&hw->diu_mode, 0);
466                 machine_data->fb_enabled = 0;
467         }
468 }
469
470 static void adjust_aoi_size_position(struct fb_var_screeninfo *var,
471                                 struct fb_info *info)
472 {
473         struct mfb_info *lower_aoi_mfbi, *upper_aoi_mfbi, *mfbi = info->par;
474         struct fsl_diu_data *machine_data = mfbi->parent;
475         int available_height, upper_aoi_bottom, index = mfbi->index;
476         int lower_aoi_is_open, upper_aoi_is_open;
477         __u32 base_plane_width, base_plane_height, upper_aoi_height;
478
479         base_plane_width = machine_data->fsl_diu_info[0]->var.xres;
480         base_plane_height = machine_data->fsl_diu_info[0]->var.yres;
481
482         if (mfbi->x_aoi_d < 0)
483                 mfbi->x_aoi_d = 0;
484         if (mfbi->y_aoi_d < 0)
485                 mfbi->y_aoi_d = 0;
486         switch (index) {
487         case 0:
488                 if (mfbi->x_aoi_d != 0)
489                         mfbi->x_aoi_d = 0;
490                 if (mfbi->y_aoi_d != 0)
491                         mfbi->y_aoi_d = 0;
492                 break;
493         case 1:                 /* AOI 0 */
494         case 3:
495                 lower_aoi_mfbi = machine_data->fsl_diu_info[index+1]->par;
496                 lower_aoi_is_open = lower_aoi_mfbi->count > 0 ? 1 : 0;
497                 if (var->xres > base_plane_width)
498                         var->xres = base_plane_width;
499                 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
500                         mfbi->x_aoi_d = base_plane_width - var->xres;
501
502                 if (lower_aoi_is_open)
503                         available_height = lower_aoi_mfbi->y_aoi_d;
504                 else
505                         available_height = base_plane_height;
506                 if (var->yres > available_height)
507                         var->yres = available_height;
508                 if ((mfbi->y_aoi_d + var->yres) > available_height)
509                         mfbi->y_aoi_d = available_height - var->yres;
510                 break;
511         case 2:                 /* AOI 1 */
512         case 4:
513                 upper_aoi_mfbi = machine_data->fsl_diu_info[index-1]->par;
514                 upper_aoi_height =
515                                 machine_data->fsl_diu_info[index-1]->var.yres;
516                 upper_aoi_bottom = upper_aoi_mfbi->y_aoi_d + upper_aoi_height;
517                 upper_aoi_is_open = upper_aoi_mfbi->count > 0 ? 1 : 0;
518                 if (var->xres > base_plane_width)
519                         var->xres = base_plane_width;
520                 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
521                         mfbi->x_aoi_d = base_plane_width - var->xres;
522                 if (mfbi->y_aoi_d < 0)
523                         mfbi->y_aoi_d = 0;
524                 if (upper_aoi_is_open) {
525                         if (mfbi->y_aoi_d < upper_aoi_bottom)
526                                 mfbi->y_aoi_d = upper_aoi_bottom;
527                         available_height = base_plane_height
528                                                 - upper_aoi_bottom;
529                 } else
530                         available_height = base_plane_height;
531                 if (var->yres > available_height)
532                         var->yres = available_height;
533                 if ((mfbi->y_aoi_d + var->yres) > base_plane_height)
534                         mfbi->y_aoi_d = base_plane_height - var->yres;
535                 break;
536         }
537 }
538 /*
539  * Checks to see if the hardware supports the state requested by var passed
540  * in. This function does not alter the hardware state! If the var passed in
541  * is slightly off by what the hardware can support then we alter the var
542  * PASSED in to what we can do. If the hardware doesn't support mode change
543  * a -EINVAL will be returned by the upper layers.
544  */
545 static int fsl_diu_check_var(struct fb_var_screeninfo *var,
546                                 struct fb_info *info)
547 {
548         unsigned long htotal, vtotal;
549
550         pr_debug("check_var xres: %d\n", var->xres);
551         pr_debug("check_var yres: %d\n", var->yres);
552
553         if (var->xres_virtual < var->xres)
554                 var->xres_virtual = var->xres;
555         if (var->yres_virtual < var->yres)
556                 var->yres_virtual = var->yres;
557
558         if (var->xoffset < 0)
559                 var->xoffset = 0;
560
561         if (var->yoffset < 0)
562                 var->yoffset = 0;
563
564         if (var->xoffset + info->var.xres > info->var.xres_virtual)
565                 var->xoffset = info->var.xres_virtual - info->var.xres;
566
567         if (var->yoffset + info->var.yres > info->var.yres_virtual)
568                 var->yoffset = info->var.yres_virtual - info->var.yres;
569
570         if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
571             (var->bits_per_pixel != 16))
572                 var->bits_per_pixel = default_bpp;
573
574         switch (var->bits_per_pixel) {
575         case 16:
576                 var->red.length = 5;
577                 var->red.offset = 11;
578                 var->red.msb_right = 0;
579
580                 var->green.length = 6;
581                 var->green.offset = 5;
582                 var->green.msb_right = 0;
583
584                 var->blue.length = 5;
585                 var->blue.offset = 0;
586                 var->blue.msb_right = 0;
587
588                 var->transp.length = 0;
589                 var->transp.offset = 0;
590                 var->transp.msb_right = 0;
591                 break;
592         case 24:
593                 var->red.length = 8;
594                 var->red.offset = 0;
595                 var->red.msb_right = 0;
596
597                 var->green.length = 8;
598                 var->green.offset = 8;
599                 var->green.msb_right = 0;
600
601                 var->blue.length = 8;
602                 var->blue.offset = 16;
603                 var->blue.msb_right = 0;
604
605                 var->transp.length = 0;
606                 var->transp.offset = 0;
607                 var->transp.msb_right = 0;
608                 break;
609         case 32:
610                 var->red.length = 8;
611                 var->red.offset = 16;
612                 var->red.msb_right = 0;
613
614                 var->green.length = 8;
615                 var->green.offset = 8;
616                 var->green.msb_right = 0;
617
618                 var->blue.length = 8;
619                 var->blue.offset = 0;
620                 var->blue.msb_right = 0;
621
622                 var->transp.length = 8;
623                 var->transp.offset = 24;
624                 var->transp.msb_right = 0;
625
626                 break;
627         }
628         /* If the pixclock is below the minimum spec'd value then set to
629          * refresh rate for 60Hz since this is supported by most monitors.
630          * Refer to Documentation/fb/ for calculations.
631          */
632         if ((var->pixclock < MIN_PIX_CLK) || (var->pixclock > MAX_PIX_CLK)) {
633                 htotal = var->xres + var->right_margin + var->hsync_len +
634                     var->left_margin;
635                 vtotal = var->yres + var->lower_margin + var->vsync_len +
636                     var->upper_margin;
637                 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
638                 var->pixclock = KHZ2PICOS(var->pixclock);
639                 pr_debug("pixclock set for 60Hz refresh = %u ps\n",
640                         var->pixclock);
641         }
642
643         var->height = -1;
644         var->width = -1;
645         var->grayscale = 0;
646
647         /* Copy nonstd field to/from sync for fbset usage */
648         var->sync |= var->nonstd;
649         var->nonstd |= var->sync;
650
651         adjust_aoi_size_position(var, info);
652         return 0;
653 }
654
655 static void set_fix(struct fb_info *info)
656 {
657         struct fb_fix_screeninfo *fix = &info->fix;
658         struct fb_var_screeninfo *var = &info->var;
659         struct mfb_info *mfbi = info->par;
660
661         strncpy(fix->id, mfbi->id, strlen(mfbi->id));
662         fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
663         fix->type = FB_TYPE_PACKED_PIXELS;
664         fix->accel = FB_ACCEL_NONE;
665         fix->visual = FB_VISUAL_TRUECOLOR;
666         fix->xpanstep = 1;
667         fix->ypanstep = 1;
668 }
669
670 static void update_lcdc(struct fb_info *info)
671 {
672         struct fb_var_screeninfo *var = &info->var;
673         struct mfb_info *mfbi = info->par;
674         struct fsl_diu_data *machine_data = mfbi->parent;
675         struct diu *hw;
676         int i, j;
677         char __iomem *cursor_base, *gamma_table_base;
678
679         u32 temp;
680
681         hw = dr.diu_reg;
682
683         if (mfbi->type == MFB_TYPE_OFF) {
684                 fsl_diu_disable_panel(info);
685                 return;
686         }
687
688         diu_ops.set_monitor_port(machine_data->monitor_port);
689         gamma_table_base = pool.gamma.vaddr;
690         cursor_base = pool.cursor.vaddr;
691         /* Prep for DIU init  - gamma table, cursor table */
692
693         for (i = 0; i <= 2; i++)
694            for (j = 0; j <= 255; j++)
695               *gamma_table_base++ = j;
696
697         diu_ops.set_gamma_table(machine_data->monitor_port, pool.gamma.vaddr);
698
699         pr_debug("update-lcdc: HW - %p\n Disabling DIU\n", hw);
700         disable_lcdc(info);
701
702         /* Program DIU registers */
703
704         out_be32(&hw->gamma, pool.gamma.paddr);
705         out_be32(&hw->cursor, pool.cursor.paddr);
706
707         out_be32(&hw->bgnd, 0x007F7F7F);        /* BGND */
708         out_be32(&hw->bgnd_wb, 0);              /* BGND_WB */
709         out_be32(&hw->disp_size, (var->yres << 16 | var->xres));
710                                                 /* DISP SIZE */
711         pr_debug("DIU xres: %d\n", var->xres);
712         pr_debug("DIU yres: %d\n", var->yres);
713
714         out_be32(&hw->wb_size, 0); /* WB SIZE */
715         out_be32(&hw->wb_mem_addr, 0); /* WB MEM ADDR */
716
717         /* Horizontal and vertical configuration register */
718         temp = var->left_margin << 22 | /* BP_H */
719                var->hsync_len << 11 |   /* PW_H */
720                var->right_margin;       /* FP_H */
721
722         out_be32(&hw->hsyn_para, temp);
723
724         temp = var->upper_margin << 22 | /* BP_V */
725                var->vsync_len << 11 |    /* PW_V  */
726                var->lower_margin;        /* FP_V  */
727
728         out_be32(&hw->vsyn_para, temp);
729
730         pr_debug("DIU right_margin - %d\n", var->right_margin);
731         pr_debug("DIU left_margin - %d\n", var->left_margin);
732         pr_debug("DIU hsync_len - %d\n", var->hsync_len);
733         pr_debug("DIU upper_margin - %d\n", var->upper_margin);
734         pr_debug("DIU lower_margin - %d\n", var->lower_margin);
735         pr_debug("DIU vsync_len - %d\n", var->vsync_len);
736         pr_debug("DIU HSYNC - 0x%08x\n", hw->hsyn_para);
737         pr_debug("DIU VSYNC - 0x%08x\n", hw->vsyn_para);
738
739         diu_ops.set_pixel_clock(var->pixclock);
740
741         out_be32(&hw->syn_pol, 0);      /* SYNC SIGNALS POLARITY */
742         out_be32(&hw->thresholds, 0x00037800); /* The Thresholds */
743         out_be32(&hw->int_status, 0);   /* INTERRUPT STATUS */
744         out_be32(&hw->plut, 0x01F5F666);
745
746         /* Enable the DIU */
747         enable_lcdc(info);
748 }
749
750 static int map_video_memory(struct fb_info *info)
751 {
752         phys_addr_t phys;
753
754         pr_debug("info->var.xres_virtual = %d\n", info->var.xres_virtual);
755         pr_debug("info->var.yres_virtual = %d\n", info->var.yres_virtual);
756         pr_debug("info->fix.line_length  = %d\n", info->fix.line_length);
757
758         info->fix.smem_len = info->fix.line_length * info->var.yres_virtual;
759         pr_debug("MAP_VIDEO_MEMORY: smem_len = %d\n", info->fix.smem_len);
760         info->screen_base = fsl_diu_alloc(info->fix.smem_len, &phys);
761         if (info->screen_base == NULL) {
762                 printk(KERN_ERR "Unable to allocate fb memory\n");
763                 return -ENOMEM;
764         }
765         info->fix.smem_start = (unsigned long) phys;
766         info->screen_size = info->fix.smem_len;
767
768         pr_debug("Allocated fb @ paddr=0x%08lx, size=%d.\n",
769                                 info->fix.smem_start,
770                 info->fix.smem_len);
771         pr_debug("screen base %p\n", info->screen_base);
772
773         return 0;
774 }
775
776 static void unmap_video_memory(struct fb_info *info)
777 {
778         fsl_diu_free(info->screen_base, info->fix.smem_len);
779         info->screen_base = NULL;
780         info->fix.smem_start = 0;
781         info->fix.smem_len = 0;
782 }
783
784 /*
785  * Using the fb_var_screeninfo in fb_info we set the aoi of this
786  * particular framebuffer. It is a light version of fsl_diu_set_par.
787  */
788 static int fsl_diu_set_aoi(struct fb_info *info)
789 {
790         struct fb_var_screeninfo *var = &info->var;
791         struct mfb_info *mfbi = info->par;
792         struct diu_ad *ad = mfbi->ad;
793
794         /* AOI should not be greater than display size */
795         ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
796         ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
797         return 0;
798 }
799
800 /*
801  * Using the fb_var_screeninfo in fb_info we set the resolution of this
802  * particular framebuffer. This function alters the fb_fix_screeninfo stored
803  * in fb_info. It does not alter var in fb_info since we are using that
804  * data. This means we depend on the data in var inside fb_info to be
805  * supported by the hardware. fsl_diu_check_var is always called before
806  * fsl_diu_set_par to ensure this.
807  */
808 static int fsl_diu_set_par(struct fb_info *info)
809 {
810         unsigned long len;
811         struct fb_var_screeninfo *var = &info->var;
812         struct mfb_info *mfbi = info->par;
813         struct fsl_diu_data *machine_data = mfbi->parent;
814         struct diu_ad *ad = mfbi->ad;
815         struct diu *hw;
816
817         hw = dr.diu_reg;
818
819         set_fix(info);
820         mfbi->cursor_reset = 1;
821
822         len = info->var.yres_virtual * info->fix.line_length;
823         /* Alloc & dealloc each time resolution/bpp change */
824         if (len != info->fix.smem_len) {
825                 if (info->fix.smem_start)
826                         unmap_video_memory(info);
827                 pr_debug("SET PAR: smem_len = %d\n", info->fix.smem_len);
828
829                 /* Memory allocation for framebuffer */
830                 if (map_video_memory(info)) {
831                         printk(KERN_ERR "Unable to allocate fb memory 1\n");
832                         return -ENOMEM;
833                 }
834         }
835
836         ad->pix_fmt =
837                 diu_ops.get_pixel_format(var->bits_per_pixel,
838                                          machine_data->monitor_port);
839         ad->addr    = cpu_to_le32(info->fix.smem_start);
840         ad->src_size_g_alpha = cpu_to_le32((var->yres_virtual << 12) |
841                                 var->xres_virtual) | mfbi->g_alpha;
842         /* AOI should not be greater than display size */
843         ad->aoi_size    = cpu_to_le32((var->yres << 16) | var->xres);
844         ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
845         ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
846
847         /* Disable chroma keying function */
848         ad->ckmax_r = 0;
849         ad->ckmax_g = 0;
850         ad->ckmax_b = 0;
851
852         ad->ckmin_r = 255;
853         ad->ckmin_g = 255;
854         ad->ckmin_b = 255;
855
856         if (mfbi->index == 0)
857                 update_lcdc(info);
858         return 0;
859 }
860
861 static inline __u32 CNVT_TOHW(__u32 val, __u32 width)
862 {
863         return ((val<<width) + 0x7FFF - val)>>16;
864 }
865
866 /*
867  * Set a single color register. The values supplied have a 16 bit magnitude
868  * which needs to be scaled in this function for the hardware. Things to take
869  * into consideration are how many color registers, if any, are supported with
870  * the current color visual. With truecolor mode no color palettes are
871  * supported. Here a psuedo palette is created which we store the value in
872  * pseudo_palette in struct fb_info. For pseudocolor mode we have a limited
873  * color palette.
874  */
875 static int fsl_diu_setcolreg(unsigned regno, unsigned red, unsigned green,
876                            unsigned blue, unsigned transp, struct fb_info *info)
877 {
878         int ret = 1;
879
880         /*
881          * If greyscale is true, then we convert the RGB value
882          * to greyscale no matter what visual we are using.
883          */
884         if (info->var.grayscale)
885                 red = green = blue = (19595 * red + 38470 * green +
886                                       7471 * blue) >> 16;
887         switch (info->fix.visual) {
888         case FB_VISUAL_TRUECOLOR:
889                 /*
890                  * 16-bit True Colour.  We encode the RGB value
891                  * according to the RGB bitfield information.
892                  */
893                 if (regno < 16) {
894                         u32 *pal = info->pseudo_palette;
895                         u32 v;
896
897                         red = CNVT_TOHW(red, info->var.red.length);
898                         green = CNVT_TOHW(green, info->var.green.length);
899                         blue = CNVT_TOHW(blue, info->var.blue.length);
900                         transp = CNVT_TOHW(transp, info->var.transp.length);
901
902                         v = (red << info->var.red.offset) |
903                             (green << info->var.green.offset) |
904                             (blue << info->var.blue.offset) |
905                             (transp << info->var.transp.offset);
906
907                         pal[regno] = v;
908                         ret = 0;
909                 }
910                 break;
911         case FB_VISUAL_STATIC_PSEUDOCOLOR:
912         case FB_VISUAL_PSEUDOCOLOR:
913                 break;
914         }
915
916         return ret;
917 }
918
919 /*
920  * Pan (or wrap, depending on the `vmode' field) the display using the
921  * 'xoffset' and 'yoffset' fields of the 'var' structure. If the values
922  * don't fit, return -EINVAL.
923  */
924 static int fsl_diu_pan_display(struct fb_var_screeninfo *var,
925                              struct fb_info *info)
926 {
927         if ((info->var.xoffset == var->xoffset) &&
928             (info->var.yoffset == var->yoffset))
929                 return 0;       /* No change, do nothing */
930
931         if (var->xoffset < 0 || var->yoffset < 0
932             || var->xoffset + info->var.xres > info->var.xres_virtual
933             || var->yoffset + info->var.yres > info->var.yres_virtual)
934                 return -EINVAL;
935
936         info->var.xoffset = var->xoffset;
937         info->var.yoffset = var->yoffset;
938
939         if (var->vmode & FB_VMODE_YWRAP)
940                 info->var.vmode |= FB_VMODE_YWRAP;
941         else
942                 info->var.vmode &= ~FB_VMODE_YWRAP;
943
944         fsl_diu_set_aoi(info);
945
946         return 0;
947 }
948
949 /*
950  * Blank the screen if blank_mode != 0, else unblank. Return 0 if blanking
951  * succeeded, != 0 if un-/blanking failed.
952  * blank_mode == 2: suspend vsync
953  * blank_mode == 3: suspend hsync
954  * blank_mode == 4: powerdown
955  */
956 static int fsl_diu_blank(int blank_mode, struct fb_info *info)
957 {
958         struct mfb_info *mfbi = info->par;
959
960         mfbi->blank = blank_mode;
961
962         switch (blank_mode) {
963         case FB_BLANK_VSYNC_SUSPEND:
964         case FB_BLANK_HSYNC_SUSPEND:
965         /* FIXME: fixes to enable_panel and enable lcdc needed */
966         case FB_BLANK_NORMAL:
967         /*      fsl_diu_disable_panel(info);*/
968                 break;
969         case FB_BLANK_POWERDOWN:
970         /*      disable_lcdc(info);     */
971                 break;
972         case FB_BLANK_UNBLANK:
973         /*      fsl_diu_enable_panel(info);*/
974                 break;
975         }
976
977         return 0;
978 }
979
980 static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
981                        unsigned long arg)
982 {
983         struct mfb_info *mfbi = info->par;
984         struct diu_ad *ad = mfbi->ad;
985         struct mfb_chroma_key ck;
986         unsigned char global_alpha;
987         struct aoi_display_offset aoi_d;
988         __u32 pix_fmt;
989         void __user *buf = (void __user *)arg;
990
991         if (!arg)
992                 return -EINVAL;
993         switch (cmd) {
994         case MFB_SET_PIXFMT:
995                 if (copy_from_user(&pix_fmt, buf, sizeof(pix_fmt)))
996                         return -EFAULT;
997                 ad->pix_fmt = pix_fmt;
998                 pr_debug("Set pixel format to 0x%08x\n", ad->pix_fmt);
999                 break;
1000         case MFB_GET_PIXFMT:
1001                 pix_fmt = ad->pix_fmt;
1002                 if (copy_to_user(buf, &pix_fmt, sizeof(pix_fmt)))
1003                         return -EFAULT;
1004                 pr_debug("get pixel format 0x%08x\n", ad->pix_fmt);
1005                 break;
1006         case MFB_SET_AOID:
1007                 if (copy_from_user(&aoi_d, buf, sizeof(aoi_d)))
1008                         return -EFAULT;
1009                 mfbi->x_aoi_d = aoi_d.x_aoi_d;
1010                 mfbi->y_aoi_d = aoi_d.y_aoi_d;
1011                 pr_debug("set AOI display offset of index %d to (%d,%d)\n",
1012                                  mfbi->index, aoi_d.x_aoi_d, aoi_d.y_aoi_d);
1013                 fsl_diu_check_var(&info->var, info);
1014                 fsl_diu_set_aoi(info);
1015                 break;
1016         case MFB_GET_AOID:
1017                 aoi_d.x_aoi_d = mfbi->x_aoi_d;
1018                 aoi_d.y_aoi_d = mfbi->y_aoi_d;
1019                 if (copy_to_user(buf, &aoi_d, sizeof(aoi_d)))
1020                         return -EFAULT;
1021                 pr_debug("get AOI display offset of index %d (%d,%d)\n",
1022                                 mfbi->index, aoi_d.x_aoi_d, aoi_d.y_aoi_d);
1023                 break;
1024         case MFB_GET_ALPHA:
1025                 global_alpha = mfbi->g_alpha;
1026                 if (copy_to_user(buf, &global_alpha, sizeof(global_alpha)))
1027                         return -EFAULT;
1028                 pr_debug("get global alpha of index %d\n", mfbi->index);
1029                 break;
1030         case MFB_SET_ALPHA:
1031                 /* set panel information */
1032                 if (copy_from_user(&global_alpha, buf, sizeof(global_alpha)))
1033                         return -EFAULT;
1034                 ad->src_size_g_alpha = (ad->src_size_g_alpha & (~0xff)) |
1035                                                         (global_alpha & 0xff);
1036                 mfbi->g_alpha = global_alpha;
1037                 pr_debug("set global alpha for index %d\n", mfbi->index);
1038                 break;
1039         case MFB_SET_CHROMA_KEY:
1040                 /* set panel winformation */
1041                 if (copy_from_user(&ck, buf, sizeof(ck)))
1042                         return -EFAULT;
1043
1044                 if (ck.enable &&
1045                    (ck.red_max < ck.red_min ||
1046                     ck.green_max < ck.green_min ||
1047                     ck.blue_max < ck.blue_min))
1048                         return -EINVAL;
1049
1050                 if (!ck.enable) {
1051                         ad->ckmax_r = 0;
1052                         ad->ckmax_g = 0;
1053                         ad->ckmax_b = 0;
1054                         ad->ckmin_r = 255;
1055                         ad->ckmin_g = 255;
1056                         ad->ckmin_b = 255;
1057                 } else {
1058                         ad->ckmax_r = ck.red_max;
1059                         ad->ckmax_g = ck.green_max;
1060                         ad->ckmax_b = ck.blue_max;
1061                         ad->ckmin_r = ck.red_min;
1062                         ad->ckmin_g = ck.green_min;
1063                         ad->ckmin_b = ck.blue_min;
1064                 }
1065                 pr_debug("set chroma key\n");
1066                 break;
1067         case FBIOGET_GWINFO:
1068                 if (mfbi->type == MFB_TYPE_OFF)
1069                         return -ENODEV;
1070                 /* get graphic window information */
1071                 if (copy_to_user(buf, ad, sizeof(*ad)))
1072                         return -EFAULT;
1073                 break;
1074         case FBIOGET_HWCINFO:
1075                 pr_debug("FBIOGET_HWCINFO:0x%08x\n", FBIOGET_HWCINFO);
1076                 break;
1077         case FBIOPUT_MODEINFO:
1078                 pr_debug("FBIOPUT_MODEINFO:0x%08x\n", FBIOPUT_MODEINFO);
1079                 break;
1080         case FBIOGET_DISPINFO:
1081                 pr_debug("FBIOGET_DISPINFO:0x%08x\n", FBIOGET_DISPINFO);
1082                 break;
1083
1084         default:
1085                 printk(KERN_ERR "Unknown ioctl command (0x%08X)\n", cmd);
1086                 return -ENOIOCTLCMD;
1087         }
1088
1089         return 0;
1090 }
1091
1092 /* turn on fb if count == 1
1093  */
1094 static int fsl_diu_open(struct fb_info *info, int user)
1095 {
1096         struct mfb_info *mfbi = info->par;
1097         int res = 0;
1098
1099         spin_lock(&diu_lock);
1100         mfbi->count++;
1101         if (mfbi->count == 1) {
1102                 pr_debug("open plane index %d\n", mfbi->index);
1103                 fsl_diu_check_var(&info->var, info);
1104                 res = fsl_diu_set_par(info);
1105                 if (res < 0)
1106                         mfbi->count--;
1107                 else {
1108                         res = fsl_diu_enable_panel(info);
1109                         if (res < 0)
1110                                 mfbi->count--;
1111                 }
1112         }
1113
1114         spin_unlock(&diu_lock);
1115         return res;
1116 }
1117
1118 /* turn off fb if count == 0
1119  */
1120 static int fsl_diu_release(struct fb_info *info, int user)
1121 {
1122         struct mfb_info *mfbi = info->par;
1123         int res = 0;
1124
1125         spin_lock(&diu_lock);
1126         mfbi->count--;
1127         if (mfbi->count == 0) {
1128                 pr_debug("release plane index %d\n", mfbi->index);
1129                 res = fsl_diu_disable_panel(info);
1130                 if (res < 0)
1131                         mfbi->count++;
1132         }
1133         spin_unlock(&diu_lock);
1134         return res;
1135 }
1136
1137 static struct fb_ops fsl_diu_ops = {
1138         .owner = THIS_MODULE,
1139         .fb_check_var = fsl_diu_check_var,
1140         .fb_set_par = fsl_diu_set_par,
1141         .fb_setcolreg = fsl_diu_setcolreg,
1142         .fb_blank = fsl_diu_blank,
1143         .fb_pan_display = fsl_diu_pan_display,
1144         .fb_fillrect = cfb_fillrect,
1145         .fb_copyarea = cfb_copyarea,
1146         .fb_imageblit = cfb_imageblit,
1147         .fb_ioctl = fsl_diu_ioctl,
1148         .fb_open = fsl_diu_open,
1149         .fb_release = fsl_diu_release,
1150 };
1151
1152 static int init_fbinfo(struct fb_info *info)
1153 {
1154         struct mfb_info *mfbi = info->par;
1155
1156         info->device = NULL;
1157         info->var.activate = FB_ACTIVATE_NOW;
1158         info->fbops = &fsl_diu_ops;
1159         info->flags = FBINFO_FLAG_DEFAULT;
1160         info->pseudo_palette = &mfbi->pseudo_palette;
1161
1162         /* Allocate colormap */
1163         fb_alloc_cmap(&info->cmap, 16, 0);
1164         return 0;
1165 }
1166
1167 static int __devinit install_fb(struct fb_info *info)
1168 {
1169         int rc;
1170         struct mfb_info *mfbi = info->par;
1171         const char *aoi_mode, *init_aoi_mode = "320x240";
1172
1173         if (init_fbinfo(info))
1174                 return -EINVAL;
1175
1176         if (mfbi->index == 0)   /* plane 0 */
1177                 aoi_mode = fb_mode;
1178         else
1179                 aoi_mode = init_aoi_mode;
1180         pr_debug("mode used = %s\n", aoi_mode);
1181         rc = fb_find_mode(&info->var, info, aoi_mode, fsl_diu_mode_db,
1182              ARRAY_SIZE(fsl_diu_mode_db), &fsl_diu_default_mode, default_bpp);
1183
1184         switch (rc) {
1185         case 1:
1186                 pr_debug("using mode specified in @mode\n");
1187                 break;
1188         case 2:
1189                 pr_debug("using mode specified in @mode "
1190                         "with ignored refresh rate\n");
1191                 break;
1192         case 3:
1193                 pr_debug("using mode default mode\n");
1194                 break;
1195         case 4:
1196                 pr_debug("using mode from list\n");
1197                 break;
1198         default:
1199                 pr_debug("rc = %d\n", rc);
1200                 pr_debug("failed to find mode\n");
1201                 return -EINVAL;
1202                 break;
1203         }
1204
1205         pr_debug("xres_virtual %d\n", info->var.xres_virtual);
1206         pr_debug("bits_per_pixel %d\n", info->var.bits_per_pixel);
1207
1208         pr_debug("info->var.yres_virtual = %d\n", info->var.yres_virtual);
1209         pr_debug("info->fix.line_length = %d\n", info->fix.line_length);
1210
1211         if (mfbi->type == MFB_TYPE_OFF)
1212                 mfbi->blank = FB_BLANK_NORMAL;
1213         else
1214                 mfbi->blank = FB_BLANK_UNBLANK;
1215
1216         if (fsl_diu_check_var(&info->var, info)) {
1217                 printk(KERN_ERR "fb_check_var failed");
1218                 fb_dealloc_cmap(&info->cmap);
1219                 return -EINVAL;
1220         }
1221
1222         if (fsl_diu_set_par(info)) {
1223                 printk(KERN_ERR "fb_set_par failed");
1224                 fb_dealloc_cmap(&info->cmap);
1225                 return -EINVAL;
1226         }
1227
1228         if (register_framebuffer(info) < 0) {
1229                 printk(KERN_ERR "register_framebuffer failed");
1230                 unmap_video_memory(info);
1231                 fb_dealloc_cmap(&info->cmap);
1232                 return -EINVAL;
1233         }
1234
1235         mfbi->registered = 1;
1236         printk(KERN_INFO "fb%d: %s fb device registered successfully.\n",
1237                  info->node, info->fix.id);
1238
1239         return 0;
1240 }
1241
1242 static void uninstall_fb(struct fb_info *info)
1243 {
1244         struct mfb_info *mfbi = info->par;
1245
1246         if (!mfbi->registered)
1247                 return;
1248
1249         unregister_framebuffer(info);
1250         unmap_video_memory(info);
1251         if (&info->cmap)
1252                 fb_dealloc_cmap(&info->cmap);
1253
1254         mfbi->registered = 0;
1255 }
1256
1257 static irqreturn_t fsl_diu_isr(int irq, void *dev_id)
1258 {
1259         struct diu *hw = dr.diu_reg;
1260         unsigned int status = in_be32(&hw->int_status);
1261
1262         if (status) {
1263                 /* This is the workaround for underrun */
1264                 if (status & INT_UNDRUN) {
1265                         out_be32(&hw->diu_mode, 0);
1266                         pr_debug("Err: DIU occurs underrun!\n");
1267                         udelay(1);
1268                         out_be32(&hw->diu_mode, 1);
1269                 }
1270 #if defined(CONFIG_NOT_COHERENT_CACHE)
1271                 else if (status & INT_VSYNC) {
1272                         unsigned int i;
1273                         for (i = 0; i < coherence_data_size;
1274                                 i += d_cache_line_size)
1275                                 __asm__ __volatile__ (
1276                                         "dcbz 0, %[input]"
1277                                 ::[input]"r"(&coherence_data[i]));
1278                 }
1279 #endif
1280                 return IRQ_HANDLED;
1281         }
1282         return IRQ_NONE;
1283 }
1284
1285 static int request_irq_local(int irq)
1286 {
1287         unsigned long status, ints;
1288         struct diu *hw;
1289         int ret;
1290
1291         hw = dr.diu_reg;
1292
1293         /* Read to clear the status */
1294         status = in_be32(&hw->int_status);
1295
1296         ret = request_irq(irq, fsl_diu_isr, 0, "diu", NULL);
1297         if (ret)
1298                 pr_info("Request diu IRQ failed.\n");
1299         else {
1300                 ints = INT_PARERR | INT_LS_BF_VS;
1301 #if !defined(CONFIG_NOT_COHERENT_CACHE)
1302                 ints |= INT_VSYNC;
1303 #endif
1304                 if (dr.mode == MFB_MODE2 || dr.mode == MFB_MODE3)
1305                         ints |= INT_VSYNC_WB;
1306
1307                 /* Read to clear the status */
1308                 status = in_be32(&hw->int_status);
1309                 out_be32(&hw->int_mask, ints);
1310         }
1311         return ret;
1312 }
1313
1314 static void free_irq_local(int irq)
1315 {
1316         struct diu *hw = dr.diu_reg;
1317
1318         /* Disable all LCDC interrupt */
1319         out_be32(&hw->int_mask, 0x1f);
1320
1321         free_irq(irq, NULL);
1322 }
1323
1324 #ifdef CONFIG_PM
1325 /*
1326  * Power management hooks. Note that we won't be called from IRQ context,
1327  * unlike the blank functions above, so we may sleep.
1328  */
1329 static int fsl_diu_suspend(struct of_device *ofdev, pm_message_t state)
1330 {
1331         struct fsl_diu_data *machine_data;
1332
1333         machine_data = dev_get_drvdata(&ofdev->dev);
1334         disable_lcdc(machine_data->fsl_diu_info[0]);
1335
1336         return 0;
1337 }
1338
1339 static int fsl_diu_resume(struct of_device *ofdev)
1340 {
1341         struct fsl_diu_data *machine_data;
1342
1343         machine_data = dev_get_drvdata(&ofdev->dev);
1344         enable_lcdc(machine_data->fsl_diu_info[0]);
1345
1346         return 0;
1347 }
1348
1349 #else
1350 #define fsl_diu_suspend NULL
1351 #define fsl_diu_resume NULL
1352 #endif                          /* CONFIG_PM */
1353
1354 /* Align to 64-bit(8-byte), 32-byte, etc. */
1355 static int allocate_buf(struct diu_addr *buf, u32 size, u32 bytes_align)
1356 {
1357         u32 offset, ssize;
1358         u32 mask;
1359         dma_addr_t paddr = 0;
1360
1361         ssize = size + bytes_align;
1362         buf->vaddr = dma_alloc_coherent(NULL, ssize, &paddr, GFP_DMA |
1363                                                              __GFP_ZERO);
1364         if (!buf->vaddr)
1365                 return -ENOMEM;
1366
1367         buf->paddr = (__u32) paddr;
1368
1369         mask = bytes_align - 1;
1370         offset = (u32)buf->paddr & mask;
1371         if (offset) {
1372                 buf->offset = bytes_align - offset;
1373                 buf->paddr = (u32)buf->paddr + offset;
1374         } else
1375                 buf->offset = 0;
1376         return 0;
1377 }
1378
1379 static void free_buf(struct diu_addr *buf, u32 size, u32 bytes_align)
1380 {
1381         dma_free_coherent(NULL, size + bytes_align,
1382                                 buf->vaddr, (buf->paddr - buf->offset));
1383         return;
1384 }
1385
1386 static ssize_t store_monitor(struct device *device,
1387         struct device_attribute *attr, const char *buf, size_t count)
1388 {
1389         int old_monitor_port;
1390         unsigned long val;
1391         struct fsl_diu_data *machine_data =
1392                 container_of(attr, struct fsl_diu_data, dev_attr);
1393
1394         if (strict_strtoul(buf, 10, &val))
1395                 return 0;
1396
1397         old_monitor_port = machine_data->monitor_port;
1398         machine_data->monitor_port = diu_ops.set_sysfs_monitor_port(val);
1399
1400         if (old_monitor_port != machine_data->monitor_port) {
1401                 /* All AOIs need adjust pixel format
1402                  * fsl_diu_set_par only change the pixsel format here
1403                  * unlikely to fail. */
1404                 fsl_diu_set_par(machine_data->fsl_diu_info[0]);
1405                 fsl_diu_set_par(machine_data->fsl_diu_info[1]);
1406                 fsl_diu_set_par(machine_data->fsl_diu_info[2]);
1407                 fsl_diu_set_par(machine_data->fsl_diu_info[3]);
1408                 fsl_diu_set_par(machine_data->fsl_diu_info[4]);
1409         }
1410         return count;
1411 }
1412
1413 static ssize_t show_monitor(struct device *device,
1414         struct device_attribute *attr, char *buf)
1415 {
1416         struct fsl_diu_data *machine_data =
1417                 container_of(attr, struct fsl_diu_data, dev_attr);
1418         return diu_ops.show_monitor_port(machine_data->monitor_port, buf);
1419 }
1420
1421 static int __devinit fsl_diu_probe(struct of_device *ofdev,
1422         const struct of_device_id *match)
1423 {
1424         struct device_node *np = ofdev->node;
1425         struct mfb_info *mfbi;
1426         phys_addr_t dummy_ad_addr;
1427         int ret, i, error = 0;
1428         struct resource res;
1429         struct fsl_diu_data *machine_data;
1430
1431         machine_data = kzalloc(sizeof(struct fsl_diu_data), GFP_KERNEL);
1432         if (!machine_data)
1433                 return -ENOMEM;
1434
1435         for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++) {
1436                 machine_data->fsl_diu_info[i] =
1437                         framebuffer_alloc(sizeof(struct mfb_info), &ofdev->dev);
1438                 if (!machine_data->fsl_diu_info[i]) {
1439                         dev_err(&ofdev->dev, "cannot allocate memory\n");
1440                         ret = -ENOMEM;
1441                         goto error2;
1442                 }
1443                 mfbi = machine_data->fsl_diu_info[i]->par;
1444                 memcpy(mfbi, &mfb_template[i], sizeof(struct mfb_info));
1445                 mfbi->parent = machine_data;
1446         }
1447
1448         ret = of_address_to_resource(np, 0, &res);
1449         if (ret) {
1450                 dev_err(&ofdev->dev, "could not obtain DIU address\n");
1451                 goto error;
1452         }
1453         if (!res.start) {
1454                 dev_err(&ofdev->dev, "invalid DIU address\n");
1455                 goto error;
1456         }
1457         dev_dbg(&ofdev->dev, "%s, res.start: 0x%08x\n", __func__, res.start);
1458
1459         dr.diu_reg = ioremap(res.start, sizeof(struct diu));
1460         if (!dr.diu_reg) {
1461                 dev_err(&ofdev->dev, "Err: can't map DIU registers!\n");
1462                 ret = -EFAULT;
1463                 goto error2;
1464         }
1465
1466         out_be32(&dr.diu_reg->diu_mode, 0);             /* disable DIU anyway*/
1467
1468         /* Get the IRQ of the DIU */
1469         machine_data->irq = irq_of_parse_and_map(np, 0);
1470
1471         if (!machine_data->irq) {
1472                 dev_err(&ofdev->dev, "could not get DIU IRQ\n");
1473                 ret = -EINVAL;
1474                 goto error;
1475         }
1476         machine_data->monitor_port = monitor_port;
1477
1478         /* Area descriptor memory pool aligns to 64-bit boundary */
1479         if (allocate_buf(&pool.ad, sizeof(struct diu_ad) * FSL_AOI_NUM, 8))
1480                 return -ENOMEM;
1481
1482         /* Get memory for Gamma Table  - 32-byte aligned memory */
1483         if (allocate_buf(&pool.gamma, 768, 32)) {
1484                 ret = -ENOMEM;
1485                 goto error;
1486         }
1487
1488         /* For performance, cursor bitmap buffer aligns to 32-byte boundary */
1489         if (allocate_buf(&pool.cursor, MAX_CURS * MAX_CURS * 2, 32)) {
1490                 ret = -ENOMEM;
1491                 goto error;
1492         }
1493
1494         i = ARRAY_SIZE(machine_data->fsl_diu_info);
1495         machine_data->dummy_ad = (struct diu_ad *)
1496                         ((u32)pool.ad.vaddr + pool.ad.offset) + i;
1497         machine_data->dummy_ad->paddr = pool.ad.paddr +
1498                         i * sizeof(struct diu_ad);
1499         machine_data->dummy_aoi_virt = fsl_diu_alloc(64, &dummy_ad_addr);
1500         if (!machine_data->dummy_aoi_virt) {
1501                 ret = -ENOMEM;
1502                 goto error;
1503         }
1504         machine_data->dummy_ad->addr = cpu_to_le32(dummy_ad_addr);
1505         machine_data->dummy_ad->pix_fmt = 0x88882317;
1506         machine_data->dummy_ad->src_size_g_alpha = cpu_to_le32((4 << 12) | 4);
1507         machine_data->dummy_ad->aoi_size = cpu_to_le32((4 << 16) |  2);
1508         machine_data->dummy_ad->offset_xyi = 0;
1509         machine_data->dummy_ad->offset_xyd = 0;
1510         machine_data->dummy_ad->next_ad = 0;
1511
1512         out_be32(&dr.diu_reg->desc[0], machine_data->dummy_ad->paddr);
1513         out_be32(&dr.diu_reg->desc[1], machine_data->dummy_ad->paddr);
1514         out_be32(&dr.diu_reg->desc[2], machine_data->dummy_ad->paddr);
1515
1516         for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++) {
1517                 machine_data->fsl_diu_info[i]->fix.smem_start = 0;
1518                 mfbi = machine_data->fsl_diu_info[i]->par;
1519                 mfbi->ad = (struct diu_ad *)((u32)pool.ad.vaddr
1520                                         + pool.ad.offset) + i;
1521                 mfbi->ad->paddr = pool.ad.paddr + i * sizeof(struct diu_ad);
1522                 ret = install_fb(machine_data->fsl_diu_info[i]);
1523                 if (ret) {
1524                         dev_err(&ofdev->dev,
1525                                 "Failed to register framebuffer %d\n",
1526                                 i);
1527                         goto error;
1528                 }
1529         }
1530
1531         if (request_irq_local(machine_data->irq)) {
1532                 dev_err(machine_data->fsl_diu_info[0]->dev,
1533                         "could not request irq for diu.");
1534                 goto error;
1535         }
1536
1537         machine_data->dev_attr.attr.name = "monitor";
1538         machine_data->dev_attr.attr.mode = S_IRUGO|S_IWUSR;
1539         machine_data->dev_attr.show = show_monitor;
1540         machine_data->dev_attr.store = store_monitor;
1541         error = device_create_file(machine_data->fsl_diu_info[0]->dev,
1542                                   &machine_data->dev_attr);
1543         if (error) {
1544                 dev_err(machine_data->fsl_diu_info[0]->dev,
1545                         "could not create sysfs %s file\n",
1546                         machine_data->dev_attr.attr.name);
1547         }
1548
1549         dev_set_drvdata(&ofdev->dev, machine_data);
1550         return 0;
1551
1552 error:
1553         for (i = ARRAY_SIZE(machine_data->fsl_diu_info);
1554                 i > 0; i--)
1555                 uninstall_fb(machine_data->fsl_diu_info[i - 1]);
1556         if (pool.ad.vaddr)
1557                 free_buf(&pool.ad, sizeof(struct diu_ad) * FSL_AOI_NUM, 8);
1558         if (pool.gamma.vaddr)
1559                 free_buf(&pool.gamma, 768, 32);
1560         if (pool.cursor.vaddr)
1561                 free_buf(&pool.cursor, MAX_CURS * MAX_CURS * 2, 32);
1562         if (machine_data->dummy_aoi_virt)
1563                 fsl_diu_free(machine_data->dummy_aoi_virt, 64);
1564         iounmap(dr.diu_reg);
1565
1566 error2:
1567         for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++)
1568                 if (machine_data->fsl_diu_info[i])
1569                         framebuffer_release(machine_data->fsl_diu_info[i]);
1570         kfree(machine_data);
1571
1572         return ret;
1573 }
1574
1575
1576 static int fsl_diu_remove(struct of_device *ofdev)
1577 {
1578         struct fsl_diu_data *machine_data;
1579         int i;
1580
1581         machine_data = dev_get_drvdata(&ofdev->dev);
1582         disable_lcdc(machine_data->fsl_diu_info[0]);
1583         free_irq_local(machine_data->irq);
1584         for (i = ARRAY_SIZE(machine_data->fsl_diu_info); i > 0; i--)
1585                 uninstall_fb(machine_data->fsl_diu_info[i - 1]);
1586         if (pool.ad.vaddr)
1587                 free_buf(&pool.ad, sizeof(struct diu_ad) * FSL_AOI_NUM, 8);
1588         if (pool.gamma.vaddr)
1589                 free_buf(&pool.gamma, 768, 32);
1590         if (pool.cursor.vaddr)
1591                 free_buf(&pool.cursor, MAX_CURS * MAX_CURS * 2, 32);
1592         if (machine_data->dummy_aoi_virt)
1593                 fsl_diu_free(machine_data->dummy_aoi_virt, 64);
1594         iounmap(dr.diu_reg);
1595         for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++)
1596                 if (machine_data->fsl_diu_info[i])
1597                         framebuffer_release(machine_data->fsl_diu_info[i]);
1598         kfree(machine_data);
1599
1600         return 0;
1601 }
1602
1603 #ifndef MODULE
1604 static int __init fsl_diu_setup(char *options)
1605 {
1606         char *opt;
1607         unsigned long val;
1608
1609         if (!options || !*options)
1610                 return 0;
1611
1612         while ((opt = strsep(&options, ",")) != NULL) {
1613                 if (!*opt)
1614                         continue;
1615                 if (!strncmp(opt, "monitor=", 8)) {
1616                         if (!strict_strtoul(opt + 8, 10, &val) && (val <= 2))
1617                                 monitor_port = val;
1618                 } else if (!strncmp(opt, "bpp=", 4)) {
1619                         if (!strict_strtoul(opt + 4, 10, &val))
1620                                 default_bpp = val;
1621                 } else
1622                         fb_mode = opt;
1623         }
1624
1625         return 0;
1626 }
1627 #endif
1628
1629 static struct of_device_id fsl_diu_match[] = {
1630         {
1631                 .compatible = "fsl,diu",
1632         },
1633         {}
1634 };
1635 MODULE_DEVICE_TABLE(of, fsl_diu_match);
1636
1637 static struct of_platform_driver fsl_diu_driver = {
1638         .owner          = THIS_MODULE,
1639         .name           = "fsl_diu",
1640         .match_table    = fsl_diu_match,
1641         .probe          = fsl_diu_probe,
1642         .remove         = fsl_diu_remove,
1643         .suspend        = fsl_diu_suspend,
1644         .resume         = fsl_diu_resume,
1645 };
1646
1647 static int __init fsl_diu_init(void)
1648 {
1649 #ifdef CONFIG_NOT_COHERENT_CACHE
1650         struct device_node *np;
1651         const u32 *prop;
1652 #endif
1653         int ret;
1654 #ifndef MODULE
1655         char *option;
1656
1657         /*
1658          * For kernel boot options (in 'video=xxxfb:<options>' format)
1659          */
1660         if (fb_get_options("fslfb", &option))
1661                 return -ENODEV;
1662         fsl_diu_setup(option);
1663 #endif
1664         printk(KERN_INFO "Freescale DIU driver\n");
1665
1666 #ifdef CONFIG_NOT_COHERENT_CACHE
1667         np = of_find_node_by_type(NULL, "cpu");
1668         if (!np) {
1669                 printk(KERN_ERR "Err: can't find device node 'cpu'\n");
1670                 return -ENODEV;
1671         }
1672
1673         prop = of_get_property(np, "d-cache-size", NULL);
1674         if (prop == NULL) {
1675                 of_node_put(np);
1676                 return -ENODEV;
1677         }
1678
1679         /* Freescale PLRU requires 13/8 times the cache size to do a proper
1680            displacement flush
1681          */
1682         coherence_data_size = *prop * 13;
1683         coherence_data_size /= 8;
1684
1685         prop = of_get_property(np, "d-cache-line-size", NULL);
1686         if (prop == NULL) {
1687                 of_node_put(np);
1688                 return -ENODEV;
1689         }
1690         d_cache_line_size = *prop;
1691
1692         of_node_put(np);
1693         coherence_data = vmalloc(coherence_data_size);
1694         if (!coherence_data)
1695                 return -ENOMEM;
1696 #endif
1697         ret = of_register_platform_driver(&fsl_diu_driver);
1698         if (ret) {
1699                 printk(KERN_ERR
1700                         "fsl-diu: failed to register platform driver\n");
1701 #if defined(CONFIG_NOT_COHERENT_CACHE)
1702                 vfree(coherence_data);
1703 #endif
1704                 iounmap(dr.diu_reg);
1705         }
1706         return ret;
1707 }
1708
1709 static void __exit fsl_diu_exit(void)
1710 {
1711         of_unregister_platform_driver(&fsl_diu_driver);
1712 #if defined(CONFIG_NOT_COHERENT_CACHE)
1713         vfree(coherence_data);
1714 #endif
1715 }
1716
1717 module_init(fsl_diu_init);
1718 module_exit(fsl_diu_exit);
1719
1720 MODULE_AUTHOR("York Sun <yorksun@freescale.com>");
1721 MODULE_DESCRIPTION("Freescale DIU framebuffer driver");
1722 MODULE_LICENSE("GPL");
1723
1724 module_param_named(mode, fb_mode, charp, 0);
1725 MODULE_PARM_DESC(mode,
1726         "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
1727 module_param_named(bpp, default_bpp, ulong, 0);
1728 MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified mode");
1729 module_param_named(monitor, monitor_port, int, 0);
1730 MODULE_PARM_DESC(monitor,
1731         "Specify the monitor port (0, 1 or 2) if supported by the platform");
1732