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NFS: Use d_automount() rather than abusing follow_link()
[linux-2.6.git] / drivers / video / fsl-diu-fb.c
blob8bbbf08fa3ce0cc3d0163c9dcc1dc9f3f77cc8ad
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 <linux/fsl-diu-fb.h>
38 #include "edid.h"
39
40 /*
41 * These parameters give default parameters
42 * for video output 1024x768,
43 * FIXME - change timing to proper amounts
44 * hsync 31.5kHz, vsync 60Hz
45 */
46 static struct fb_videomode __devinitdata fsl_diu_default_mode = {
47 .refresh = 60,
48 .xres = 1024,
49 .yres = 768,
50 .pixclock = 15385,
51 .left_margin = 160,
52 .right_margin = 24,
53 .upper_margin = 29,
54 .lower_margin = 3,
55 .hsync_len = 136,
56 .vsync_len = 6,
57 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
58 .vmode = FB_VMODE_NONINTERLACED
59 };
60
61 static struct fb_videomode __devinitdata fsl_diu_mode_db[] = {
62 {
63 .name = "1024x768-60",
64 .refresh = 60,
65 .xres = 1024,
66 .yres = 768,
67 .pixclock = 15385,
68 .left_margin = 160,
69 .right_margin = 24,
70 .upper_margin = 29,
71 .lower_margin = 3,
72 .hsync_len = 136,
73 .vsync_len = 6,
74 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
75 .vmode = FB_VMODE_NONINTERLACED
76 },
77 {
78 .name = "1024x768-70",
79 .refresh = 70,
80 .xres = 1024,
81 .yres = 768,
82 .pixclock = 16886,
83 .left_margin = 3,
84 .right_margin = 3,
85 .upper_margin = 2,
86 .lower_margin = 2,
87 .hsync_len = 40,
88 .vsync_len = 18,
89 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
90 .vmode = FB_VMODE_NONINTERLACED
91 },
92 {
93 .name = "1024x768-75",
94 .refresh = 75,
95 .xres = 1024,
96 .yres = 768,
97 .pixclock = 15009,
98 .left_margin = 3,
99 .right_margin = 3,
100 .upper_margin = 2,
101 .lower_margin = 2,
102 .hsync_len = 80,
103 .vsync_len = 32,
104 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
105 .vmode = FB_VMODE_NONINTERLACED
106 },
107 {
108 .name = "1280x1024-60",
109 .refresh = 60,
110 .xres = 1280,
111 .yres = 1024,
112 .pixclock = 9375,
113 .left_margin = 38,
114 .right_margin = 128,
115 .upper_margin = 2,
116 .lower_margin = 7,
117 .hsync_len = 216,
118 .vsync_len = 37,
119 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
120 .vmode = FB_VMODE_NONINTERLACED
121 },
122 {
123 .name = "1280x1024-70",
124 .refresh = 70,
125 .xres = 1280,
126 .yres = 1024,
127 .pixclock = 9380,
128 .left_margin = 6,
129 .right_margin = 6,
130 .upper_margin = 4,
131 .lower_margin = 4,
132 .hsync_len = 60,
133 .vsync_len = 94,
134 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
135 .vmode = FB_VMODE_NONINTERLACED
136 },
137 {
138 .name = "1280x1024-75",
139 .refresh = 75,
140 .xres = 1280,
141 .yres = 1024,
142 .pixclock = 9380,
143 .left_margin = 6,
144 .right_margin = 6,
145 .upper_margin = 4,
146 .lower_margin = 4,
147 .hsync_len = 60,
148 .vsync_len = 15,
149 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
150 .vmode = FB_VMODE_NONINTERLACED
151 },
152 {
153 .name = "320x240", /* for AOI only */
154 .refresh = 60,
155 .xres = 320,
156 .yres = 240,
157 .pixclock = 15385,
158 .left_margin = 0,
159 .right_margin = 0,
160 .upper_margin = 0,
161 .lower_margin = 0,
162 .hsync_len = 0,
163 .vsync_len = 0,
164 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
165 .vmode = FB_VMODE_NONINTERLACED
166 },
167 {
168 .name = "1280x480-60",
169 .refresh = 60,
170 .xres = 1280,
171 .yres = 480,
172 .pixclock = 18939,
173 .left_margin = 353,
174 .right_margin = 47,
175 .upper_margin = 39,
176 .lower_margin = 4,
177 .hsync_len = 8,
178 .vsync_len = 2,
179 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
180 .vmode = FB_VMODE_NONINTERLACED
181 },
182 };
183
184 static char *fb_mode = "1024x768-32@60";
185 static unsigned long default_bpp = 32;
186 static int monitor_port;
187
188 #if defined(CONFIG_NOT_COHERENT_CACHE)
189 static u8 *coherence_data;
190 static size_t coherence_data_size;
191 static unsigned int d_cache_line_size;
192 #endif
193
194 static DEFINE_SPINLOCK(diu_lock);
195
196 struct fsl_diu_data {
197 struct fb_info *fsl_diu_info[FSL_AOI_NUM - 1];
198 /*FSL_AOI_NUM has one dummy AOI */
199 struct device_attribute dev_attr;
200 struct diu_ad *dummy_ad;
201 void *dummy_aoi_virt;
202 unsigned int irq;
203 int fb_enabled;
204 int monitor_port;
205 };
206
207 struct mfb_info {
208 int index;
209 int type;
210 char *id;
211 int registered;
212 int blank;
213 unsigned long pseudo_palette[16];
214 struct diu_ad *ad;
215 int cursor_reset;
216 unsigned char g_alpha;
217 unsigned int count;
218 int x_aoi_d; /* aoi display x offset to physical screen */
219 int y_aoi_d; /* aoi display y offset to physical screen */
220 struct fsl_diu_data *parent;
221 u8 *edid_data;
222 };
223
224
225 static struct mfb_info mfb_template[] = {
226 { /* AOI 0 for plane 0 */
227 .index = 0,
228 .type = MFB_TYPE_OUTPUT,
229 .id = "Panel0",
230 .registered = 0,
231 .count = 0,
232 .x_aoi_d = 0,
233 .y_aoi_d = 0,
234 },
235 { /* AOI 0 for plane 1 */
236 .index = 1,
237 .type = MFB_TYPE_OUTPUT,
238 .id = "Panel1 AOI0",
239 .registered = 0,
240 .g_alpha = 0xff,
241 .count = 0,
242 .x_aoi_d = 0,
243 .y_aoi_d = 0,
244 },
245 { /* AOI 1 for plane 1 */
246 .index = 2,
247 .type = MFB_TYPE_OUTPUT,
248 .id = "Panel1 AOI1",
249 .registered = 0,
250 .g_alpha = 0xff,
251 .count = 0,
252 .x_aoi_d = 0,
253 .y_aoi_d = 480,
254 },
255 { /* AOI 0 for plane 2 */
256 .index = 3,
257 .type = MFB_TYPE_OUTPUT,
258 .id = "Panel2 AOI0",
259 .registered = 0,
260 .g_alpha = 0xff,
261 .count = 0,
262 .x_aoi_d = 640,
263 .y_aoi_d = 0,
264 },
265 { /* AOI 1 for plane 2 */
266 .index = 4,
267 .type = MFB_TYPE_OUTPUT,
268 .id = "Panel2 AOI1",
269 .registered = 0,
270 .g_alpha = 0xff,
271 .count = 0,
272 .x_aoi_d = 640,
273 .y_aoi_d = 480,
274 },
275 };
276
277 static struct diu_hw dr = {
278 .mode = MFB_MODE1,
279 .reg_lock = __SPIN_LOCK_UNLOCKED(diu_hw.reg_lock),
280 };
281
282 static struct diu_pool pool;
283
284 /**
285 * fsl_diu_alloc - allocate memory for the DIU
286 * @size: number of bytes to allocate
287 * @param: returned physical address of memory
288 *
289 * This function allocates a physically-contiguous block of memory.
290 */
291 static void *fsl_diu_alloc(size_t size, phys_addr_t *phys)
292 {
293 void *virt;
294
295 pr_debug("size=%zu\n", size);
296
297 virt = alloc_pages_exact(size, GFP_DMA | __GFP_ZERO);
298 if (virt) {
299 *phys = virt_to_phys(virt);
300 pr_debug("virt=%p phys=%llx\n", virt,
301 (unsigned long long)*phys);
302 }
303
304 return virt;
305 }
306
307 /**
308 * fsl_diu_free - release DIU memory
309 * @virt: pointer returned by fsl_diu_alloc()
310 * @size: number of bytes allocated by fsl_diu_alloc()
311 *
312 * This function releases memory allocated by fsl_diu_alloc().
313 */
314 static void fsl_diu_free(void *virt, size_t size)
315 {
316 pr_debug("virt=%p size=%zu\n", virt, size);
317
318 if (virt && size)
319 free_pages_exact(virt, size);
320 }
321
322 /*
323 * Workaround for failed writing desc register of planes.
324 * Needed with MPC5121 DIU rev 2.0 silicon.
325 */
326 void wr_reg_wa(u32 *reg, u32 val)
327 {
328 do {
329 out_be32(reg, val);
330 } while (in_be32(reg) != val);
331 }
332
333 static int fsl_diu_enable_panel(struct fb_info *info)
334 {
335 struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
336 struct diu *hw = dr.diu_reg;
337 struct diu_ad *ad = mfbi->ad;
338 struct fsl_diu_data *machine_data = mfbi->parent;
339 int res = 0;
340
341 pr_debug("enable_panel index %d\n", mfbi->index);
342 if (mfbi->type != MFB_TYPE_OFF) {
343 switch (mfbi->index) {
344 case 0: /* plane 0 */
345 if (hw->desc[0] != ad->paddr)
346 wr_reg_wa(&hw->desc[0], ad->paddr);
347 break;
348 case 1: /* plane 1 AOI 0 */
349 cmfbi = machine_data->fsl_diu_info[2]->par;
350 if (hw->desc[1] != ad->paddr) { /* AOI0 closed */
351 if (cmfbi->count > 0) /* AOI1 open */
352 ad->next_ad =
353 cpu_to_le32(cmfbi->ad->paddr);
354 else
355 ad->next_ad = 0;
356 wr_reg_wa(&hw->desc[1], ad->paddr);
357 }
358 break;
359 case 3: /* plane 2 AOI 0 */
360 cmfbi = machine_data->fsl_diu_info[4]->par;
361 if (hw->desc[2] != ad->paddr) { /* AOI0 closed */
362 if (cmfbi->count > 0) /* AOI1 open */
363 ad->next_ad =
364 cpu_to_le32(cmfbi->ad->paddr);
365 else
366 ad->next_ad = 0;
367 wr_reg_wa(&hw->desc[2], ad->paddr);
368 }
369 break;
370 case 2: /* plane 1 AOI 1 */
371 pmfbi = machine_data->fsl_diu_info[1]->par;
372 ad->next_ad = 0;
373 if (hw->desc[1] == machine_data->dummy_ad->paddr)
374 wr_reg_wa(&hw->desc[1], ad->paddr);
375 else /* AOI0 open */
376 pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
377 break;
378 case 4: /* plane 2 AOI 1 */
379 pmfbi = machine_data->fsl_diu_info[3]->par;
380 ad->next_ad = 0;
381 if (hw->desc[2] == machine_data->dummy_ad->paddr)
382 wr_reg_wa(&hw->desc[2], ad->paddr);
383 else /* AOI0 was open */
384 pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
385 break;
386 default:
387 res = -EINVAL;
388 break;
389 }
390 } else
391 res = -EINVAL;
392 return res;
393 }
394
395 static int fsl_diu_disable_panel(struct fb_info *info)
396 {
397 struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
398 struct diu *hw = dr.diu_reg;
399 struct diu_ad *ad = mfbi->ad;
400 struct fsl_diu_data *machine_data = mfbi->parent;
401 int res = 0;
402
403 switch (mfbi->index) {
404 case 0: /* plane 0 */
405 if (hw->desc[0] != machine_data->dummy_ad->paddr)
406 wr_reg_wa(&hw->desc[0], machine_data->dummy_ad->paddr);
407 break;
408 case 1: /* plane 1 AOI 0 */
409 cmfbi = machine_data->fsl_diu_info[2]->par;
410 if (cmfbi->count > 0) /* AOI1 is open */
411 wr_reg_wa(&hw->desc[1], cmfbi->ad->paddr);
412 /* move AOI1 to the first */
413 else /* AOI1 was closed */
414 wr_reg_wa(&hw->desc[1], machine_data->dummy_ad->paddr);
415 /* close AOI 0 */
416 break;
417 case 3: /* plane 2 AOI 0 */
418 cmfbi = machine_data->fsl_diu_info[4]->par;
419 if (cmfbi->count > 0) /* AOI1 is open */
420 wr_reg_wa(&hw->desc[2], cmfbi->ad->paddr);
421 /* move AOI1 to the first */
422 else /* AOI1 was closed */
423 wr_reg_wa(&hw->desc[2], machine_data->dummy_ad->paddr);
424 /* close AOI 0 */
425 break;
426 case 2: /* plane 1 AOI 1 */
427 pmfbi = machine_data->fsl_diu_info[1]->par;
428 if (hw->desc[1] != ad->paddr) {
429 /* AOI1 is not the first in the chain */
430 if (pmfbi->count > 0)
431 /* AOI0 is open, must be the first */
432 pmfbi->ad->next_ad = 0;
433 } else /* AOI1 is the first in the chain */
434 wr_reg_wa(&hw->desc[1], machine_data->dummy_ad->paddr);
435 /* close AOI 1 */
436 break;
437 case 4: /* plane 2 AOI 1 */
438 pmfbi = machine_data->fsl_diu_info[3]->par;
439 if (hw->desc[2] != ad->paddr) {
440 /* AOI1 is not the first in the chain */
441 if (pmfbi->count > 0)
442 /* AOI0 is open, must be the first */
443 pmfbi->ad->next_ad = 0;
444 } else /* AOI1 is the first in the chain */
445 wr_reg_wa(&hw->desc[2], machine_data->dummy_ad->paddr);
446 /* close AOI 1 */
447 break;
448 default:
449 res = -EINVAL;
450 break;
451 }
452
453 return res;
454 }
455
456 static void enable_lcdc(struct fb_info *info)
457 {
458 struct diu *hw = dr.diu_reg;
459 struct mfb_info *mfbi = info->par;
460 struct fsl_diu_data *machine_data = mfbi->parent;
461
462 if (!machine_data->fb_enabled) {
463 out_be32(&hw->diu_mode, dr.mode);
464 machine_data->fb_enabled++;
465 }
466 }
467
468 static void disable_lcdc(struct fb_info *info)
469 {
470 struct diu *hw = dr.diu_reg;
471 struct mfb_info *mfbi = info->par;
472 struct fsl_diu_data *machine_data = mfbi->parent;
473
474 if (machine_data->fb_enabled) {
475 out_be32(&hw->diu_mode, 0);
476 machine_data->fb_enabled = 0;
477 }
478 }
479
480 static void adjust_aoi_size_position(struct fb_var_screeninfo *var,
481 struct fb_info *info)
482 {
483 struct mfb_info *lower_aoi_mfbi, *upper_aoi_mfbi, *mfbi = info->par;
484 struct fsl_diu_data *machine_data = mfbi->parent;
485 int available_height, upper_aoi_bottom, index = mfbi->index;
486 int lower_aoi_is_open, upper_aoi_is_open;
487 __u32 base_plane_width, base_plane_height, upper_aoi_height;
488
489 base_plane_width = machine_data->fsl_diu_info[0]->var.xres;
490 base_plane_height = machine_data->fsl_diu_info[0]->var.yres;
491
492 if (mfbi->x_aoi_d < 0)
493 mfbi->x_aoi_d = 0;
494 if (mfbi->y_aoi_d < 0)
495 mfbi->y_aoi_d = 0;
496 switch (index) {
497 case 0:
498 if (mfbi->x_aoi_d != 0)
499 mfbi->x_aoi_d = 0;
500 if (mfbi->y_aoi_d != 0)
501 mfbi->y_aoi_d = 0;
502 break;
503 case 1: /* AOI 0 */
504 case 3:
505 lower_aoi_mfbi = machine_data->fsl_diu_info[index+1]->par;
506 lower_aoi_is_open = lower_aoi_mfbi->count > 0 ? 1 : 0;
507 if (var->xres > base_plane_width)
508 var->xres = base_plane_width;
509 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
510 mfbi->x_aoi_d = base_plane_width - var->xres;
511
512 if (lower_aoi_is_open)
513 available_height = lower_aoi_mfbi->y_aoi_d;
514 else
515 available_height = base_plane_height;
516 if (var->yres > available_height)
517 var->yres = available_height;
518 if ((mfbi->y_aoi_d + var->yres) > available_height)
519 mfbi->y_aoi_d = available_height - var->yres;
520 break;
521 case 2: /* AOI 1 */
522 case 4:
523 upper_aoi_mfbi = machine_data->fsl_diu_info[index-1]->par;
524 upper_aoi_height =
525 machine_data->fsl_diu_info[index-1]->var.yres;
526 upper_aoi_bottom = upper_aoi_mfbi->y_aoi_d + upper_aoi_height;
527 upper_aoi_is_open = upper_aoi_mfbi->count > 0 ? 1 : 0;
528 if (var->xres > base_plane_width)
529 var->xres = base_plane_width;
530 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
531 mfbi->x_aoi_d = base_plane_width - var->xres;
532 if (mfbi->y_aoi_d < 0)
533 mfbi->y_aoi_d = 0;
534 if (upper_aoi_is_open) {
535 if (mfbi->y_aoi_d < upper_aoi_bottom)
536 mfbi->y_aoi_d = upper_aoi_bottom;
537 available_height = base_plane_height
538 - upper_aoi_bottom;
539 } else
540 available_height = base_plane_height;
541 if (var->yres > available_height)
542 var->yres = available_height;
543 if ((mfbi->y_aoi_d + var->yres) > base_plane_height)
544 mfbi->y_aoi_d = base_plane_height - var->yres;
545 break;
546 }
547 }
548 /*
549 * Checks to see if the hardware supports the state requested by var passed
550 * in. This function does not alter the hardware state! If the var passed in
551 * is slightly off by what the hardware can support then we alter the var
552 * PASSED in to what we can do. If the hardware doesn't support mode change
553 * a -EINVAL will be returned by the upper layers.
554 */
555 static int fsl_diu_check_var(struct fb_var_screeninfo *var,
556 struct fb_info *info)
557 {
558 unsigned long htotal, vtotal;
559
560 pr_debug("check_var xres: %d\n", var->xres);
561 pr_debug("check_var yres: %d\n", var->yres);
562
563 if (var->xres_virtual < var->xres)
564 var->xres_virtual = var->xres;
565 if (var->yres_virtual < var->yres)
566 var->yres_virtual = var->yres;
567
568 if (var->xoffset < 0)
569 var->xoffset = 0;
570
571 if (var->yoffset < 0)
572 var->yoffset = 0;
573
574 if (var->xoffset + info->var.xres > info->var.xres_virtual)
575 var->xoffset = info->var.xres_virtual - info->var.xres;
576
577 if (var->yoffset + info->var.yres > info->var.yres_virtual)
578 var->yoffset = info->var.yres_virtual - info->var.yres;
579
580 if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
581 (var->bits_per_pixel != 16))
582 var->bits_per_pixel = default_bpp;
583
584 switch (var->bits_per_pixel) {
585 case 16:
586 var->red.length = 5;
587 var->red.offset = 11;
588 var->red.msb_right = 0;
589
590 var->green.length = 6;
591 var->green.offset = 5;
592 var->green.msb_right = 0;
593
594 var->blue.length = 5;
595 var->blue.offset = 0;
596 var->blue.msb_right = 0;
597
598 var->transp.length = 0;
599 var->transp.offset = 0;
600 var->transp.msb_right = 0;
601 break;
602 case 24:
603 var->red.length = 8;
604 var->red.offset = 0;
605 var->red.msb_right = 0;
606
607 var->green.length = 8;
608 var->green.offset = 8;
609 var->green.msb_right = 0;
610
611 var->blue.length = 8;
612 var->blue.offset = 16;
613 var->blue.msb_right = 0;
614
615 var->transp.length = 0;
616 var->transp.offset = 0;
617 var->transp.msb_right = 0;
618 break;
619 case 32:
620 var->red.length = 8;
621 var->red.offset = 16;
622 var->red.msb_right = 0;
623
624 var->green.length = 8;
625 var->green.offset = 8;
626 var->green.msb_right = 0;
627
628 var->blue.length = 8;
629 var->blue.offset = 0;
630 var->blue.msb_right = 0;
631
632 var->transp.length = 8;
633 var->transp.offset = 24;
634 var->transp.msb_right = 0;
635
636 break;
637 }
638 /* If the pixclock is below the minimum spec'd value then set to
639 * refresh rate for 60Hz since this is supported by most monitors.
640 * Refer to Documentation/fb/ for calculations.
641 */
642 if ((var->pixclock < MIN_PIX_CLK) || (var->pixclock > MAX_PIX_CLK)) {
643 htotal = var->xres + var->right_margin + var->hsync_len +
644 var->left_margin;
645 vtotal = var->yres + var->lower_margin + var->vsync_len +
646 var->upper_margin;
647 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
648 var->pixclock = KHZ2PICOS(var->pixclock);
649 pr_debug("pixclock set for 60Hz refresh = %u ps\n",
650 var->pixclock);
651 }
652
653 var->height = -1;
654 var->width = -1;
655 var->grayscale = 0;
656
657 /* Copy nonstd field to/from sync for fbset usage */
658 var->sync |= var->nonstd;
659 var->nonstd |= var->sync;
660
661 adjust_aoi_size_position(var, info);
662 return 0;
663 }
664
665 static void set_fix(struct fb_info *info)
666 {
667 struct fb_fix_screeninfo *fix = &info->fix;
668 struct fb_var_screeninfo *var = &info->var;
669 struct mfb_info *mfbi = info->par;
670
671 strncpy(fix->id, mfbi->id, strlen(mfbi->id));
672 fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
673 fix->type = FB_TYPE_PACKED_PIXELS;
674 fix->accel = FB_ACCEL_NONE;
675 fix->visual = FB_VISUAL_TRUECOLOR;
676 fix->xpanstep = 1;
677 fix->ypanstep = 1;
678 }
679
680 static void update_lcdc(struct fb_info *info)
681 {
682 struct fb_var_screeninfo *var = &info->var;
683 struct mfb_info *mfbi = info->par;
684 struct fsl_diu_data *machine_data = mfbi->parent;
685 struct diu *hw;
686 int i, j;
687 char __iomem *cursor_base, *gamma_table_base;
688
689 u32 temp;
690
691 hw = dr.diu_reg;
692
693 if (mfbi->type == MFB_TYPE_OFF) {
694 fsl_diu_disable_panel(info);
695 return;
696 }
697
698 diu_ops.set_monitor_port(machine_data->monitor_port);
699 gamma_table_base = pool.gamma.vaddr;
700 cursor_base = pool.cursor.vaddr;
701 /* Prep for DIU init - gamma table, cursor table */
702
703 for (i = 0; i <= 2; i++)
704 for (j = 0; j <= 255; j++)
705 *gamma_table_base++ = j;
706
707 diu_ops.set_gamma_table(machine_data->monitor_port, pool.gamma.vaddr);
708
709 pr_debug("update-lcdc: HW - %p\n Disabling DIU\n", hw);
710 disable_lcdc(info);
711
712 /* Program DIU registers */
713
714 out_be32(&hw->gamma, pool.gamma.paddr);
715 out_be32(&hw->cursor, pool.cursor.paddr);
716
717 out_be32(&hw->bgnd, 0x007F7F7F); /* BGND */
718 out_be32(&hw->bgnd_wb, 0); /* BGND_WB */
719 out_be32(&hw->disp_size, (var->yres << 16 | var->xres));
720 /* DISP SIZE */
721 pr_debug("DIU xres: %d\n", var->xres);
722 pr_debug("DIU yres: %d\n", var->yres);
723
724 out_be32(&hw->wb_size, 0); /* WB SIZE */
725 out_be32(&hw->wb_mem_addr, 0); /* WB MEM ADDR */
726
727 /* Horizontal and vertical configuration register */
728 temp = var->left_margin << 22 | /* BP_H */
729 var->hsync_len << 11 | /* PW_H */
730 var->right_margin; /* FP_H */
731
732 out_be32(&hw->hsyn_para, temp);
733
734 temp = var->upper_margin << 22 | /* BP_V */
735 var->vsync_len << 11 | /* PW_V */
736 var->lower_margin; /* FP_V */
737
738 out_be32(&hw->vsyn_para, temp);
739
740 pr_debug("DIU right_margin - %d\n", var->right_margin);
741 pr_debug("DIU left_margin - %d\n", var->left_margin);
742 pr_debug("DIU hsync_len - %d\n", var->hsync_len);
743 pr_debug("DIU upper_margin - %d\n", var->upper_margin);
744 pr_debug("DIU lower_margin - %d\n", var->lower_margin);
745 pr_debug("DIU vsync_len - %d\n", var->vsync_len);
746 pr_debug("DIU HSYNC - 0x%08x\n", hw->hsyn_para);
747 pr_debug("DIU VSYNC - 0x%08x\n", hw->vsyn_para);
748
749 diu_ops.set_pixel_clock(var->pixclock);
750
751 out_be32(&hw->syn_pol, 0); /* SYNC SIGNALS POLARITY */
752 out_be32(&hw->thresholds, 0x00037800); /* The Thresholds */
753 out_be32(&hw->int_status, 0); /* INTERRUPT STATUS */
754 out_be32(&hw->plut, 0x01F5F666);
755
756 /* Enable the DIU */
757 enable_lcdc(info);
758 }
759
760 static int map_video_memory(struct fb_info *info)
761 {
762 phys_addr_t phys;
763 u32 smem_len = info->fix.line_length * info->var.yres_virtual;
764
765 pr_debug("info->var.xres_virtual = %d\n", info->var.xres_virtual);
766 pr_debug("info->var.yres_virtual = %d\n", info->var.yres_virtual);
767 pr_debug("info->fix.line_length = %d\n", info->fix.line_length);
768 pr_debug("MAP_VIDEO_MEMORY: smem_len = %u\n", smem_len);
769
770 info->screen_base = fsl_diu_alloc(smem_len, &phys);
771 if (info->screen_base == NULL) {
772 printk(KERN_ERR "Unable to allocate fb memory\n");
773 return -ENOMEM;
774 }
775 mutex_lock(&info->mm_lock);
776 info->fix.smem_start = (unsigned long) phys;
777 info->fix.smem_len = smem_len;
778 mutex_unlock(&info->mm_lock);
779 info->screen_size = info->fix.smem_len;
780
781 pr_debug("Allocated fb @ paddr=0x%08lx, size=%d.\n",
782 info->fix.smem_start, info->fix.smem_len);
783 pr_debug("screen base %p\n", info->screen_base);
784
785 return 0;
786 }
787
788 static void unmap_video_memory(struct fb_info *info)
789 {
790 fsl_diu_free(info->screen_base, info->fix.smem_len);
791 mutex_lock(&info->mm_lock);
792 info->screen_base = NULL;
793 info->fix.smem_start = 0;
794 info->fix.smem_len = 0;
795 mutex_unlock(&info->mm_lock);
796 }
797
798 /*
799 * Using the fb_var_screeninfo in fb_info we set the aoi of this
800 * particular framebuffer. It is a light version of fsl_diu_set_par.
801 */
802 static int fsl_diu_set_aoi(struct fb_info *info)
803 {
804 struct fb_var_screeninfo *var = &info->var;
805 struct mfb_info *mfbi = info->par;
806 struct diu_ad *ad = mfbi->ad;
807
808 /* AOI should not be greater than display size */
809 ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
810 ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
811 return 0;
812 }
813
814 /*
815 * Using the fb_var_screeninfo in fb_info we set the resolution of this
816 * particular framebuffer. This function alters the fb_fix_screeninfo stored
817 * in fb_info. It does not alter var in fb_info since we are using that
818 * data. This means we depend on the data in var inside fb_info to be
819 * supported by the hardware. fsl_diu_check_var is always called before
820 * fsl_diu_set_par to ensure this.
821 */
822 static int fsl_diu_set_par(struct fb_info *info)
823 {
824 unsigned long len;
825 struct fb_var_screeninfo *var = &info->var;
826 struct mfb_info *mfbi = info->par;
827 struct fsl_diu_data *machine_data = mfbi->parent;
828 struct diu_ad *ad = mfbi->ad;
829 struct diu *hw;
830
831 hw = dr.diu_reg;
832
833 set_fix(info);
834 mfbi->cursor_reset = 1;
835
836 len = info->var.yres_virtual * info->fix.line_length;
837 /* Alloc & dealloc each time resolution/bpp change */
838 if (len != info->fix.smem_len) {
839 if (info->fix.smem_start)
840 unmap_video_memory(info);
841 pr_debug("SET PAR: smem_len = %d\n", info->fix.smem_len);
842
843 /* Memory allocation for framebuffer */
844 if (map_video_memory(info)) {
845 printk(KERN_ERR "Unable to allocate fb memory 1\n");
846 return -ENOMEM;
847 }
848 }
849
850 ad->pix_fmt =
851 diu_ops.get_pixel_format(var->bits_per_pixel,
852 machine_data->monitor_port);
853 ad->addr = cpu_to_le32(info->fix.smem_start);
854 ad->src_size_g_alpha = cpu_to_le32((var->yres_virtual << 12) |
855 var->xres_virtual) | mfbi->g_alpha;
856 /* AOI should not be greater than display size */
857 ad->aoi_size = cpu_to_le32((var->yres << 16) | var->xres);
858 ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
859 ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
860
861 /* Disable chroma keying function */
862 ad->ckmax_r = 0;
863 ad->ckmax_g = 0;
864 ad->ckmax_b = 0;
865
866 ad->ckmin_r = 255;
867 ad->ckmin_g = 255;
868 ad->ckmin_b = 255;
869
870 if (mfbi->index == 0)
871 update_lcdc(info);
872 return 0;
873 }
874
875 static inline __u32 CNVT_TOHW(__u32 val, __u32 width)
876 {
877 return ((val<<width) + 0x7FFF - val)>>16;
878 }
879
880 /*
881 * Set a single color register. The values supplied have a 16 bit magnitude
882 * which needs to be scaled in this function for the hardware. Things to take
883 * into consideration are how many color registers, if any, are supported with
884 * the current color visual. With truecolor mode no color palettes are
885 * supported. Here a psuedo palette is created which we store the value in
886 * pseudo_palette in struct fb_info. For pseudocolor mode we have a limited
887 * color palette.
888 */
889 static int fsl_diu_setcolreg(unsigned regno, unsigned red, unsigned green,
890 unsigned blue, unsigned transp, struct fb_info *info)
891 {
892 int ret = 1;
893
894 /*
895 * If greyscale is true, then we convert the RGB value
896 * to greyscale no matter what visual we are using.
897 */
898 if (info->var.grayscale)
899 red = green = blue = (19595 * red + 38470 * green +
900 7471 * blue) >> 16;
901 switch (info->fix.visual) {
902 case FB_VISUAL_TRUECOLOR:
903 /*
904 * 16-bit True Colour. We encode the RGB value
905 * according to the RGB bitfield information.
906 */
907 if (regno < 16) {
908 u32 *pal = info->pseudo_palette;
909 u32 v;
910
911 red = CNVT_TOHW(red, info->var.red.length);
912 green = CNVT_TOHW(green, info->var.green.length);
913 blue = CNVT_TOHW(blue, info->var.blue.length);
914 transp = CNVT_TOHW(transp, info->var.transp.length);
915
916 v = (red << info->var.red.offset) |
917 (green << info->var.green.offset) |
918 (blue << info->var.blue.offset) |
919 (transp << info->var.transp.offset);
920
921 pal[regno] = v;
922 ret = 0;
923 }
924 break;
925 case FB_VISUAL_STATIC_PSEUDOCOLOR:
926 case FB_VISUAL_PSEUDOCOLOR:
927 break;
928 }
929
930 return ret;
931 }
932
933 /*
934 * Pan (or wrap, depending on the `vmode' field) the display using the
935 * 'xoffset' and 'yoffset' fields of the 'var' structure. If the values
936 * don't fit, return -EINVAL.
937 */
938 static int fsl_diu_pan_display(struct fb_var_screeninfo *var,
939 struct fb_info *info)
940 {
941 if ((info->var.xoffset == var->xoffset) &&
942 (info->var.yoffset == var->yoffset))
943 return 0; /* No change, do nothing */
944
945 if (var->xoffset < 0 || var->yoffset < 0
946 || var->xoffset + info->var.xres > info->var.xres_virtual
947 || var->yoffset + info->var.yres > info->var.yres_virtual)
948 return -EINVAL;
949
950 info->var.xoffset = var->xoffset;
951 info->var.yoffset = var->yoffset;
952
953 if (var->vmode & FB_VMODE_YWRAP)
954 info->var.vmode |= FB_VMODE_YWRAP;
955 else
956 info->var.vmode &= ~FB_VMODE_YWRAP;
957
958 fsl_diu_set_aoi(info);
959
960 return 0;
961 }
962
963 /*
964 * Blank the screen if blank_mode != 0, else unblank. Return 0 if blanking
965 * succeeded, != 0 if un-/blanking failed.
966 * blank_mode == 2: suspend vsync
967 * blank_mode == 3: suspend hsync
968 * blank_mode == 4: powerdown
969 */
970 static int fsl_diu_blank(int blank_mode, struct fb_info *info)
971 {
972 struct mfb_info *mfbi = info->par;
973
974 mfbi->blank = blank_mode;
975
976 switch (blank_mode) {
977 case FB_BLANK_VSYNC_SUSPEND:
978 case FB_BLANK_HSYNC_SUSPEND:
979 /* FIXME: fixes to enable_panel and enable lcdc needed */
980 case FB_BLANK_NORMAL:
981 /* fsl_diu_disable_panel(info);*/
982 break;
983 case FB_BLANK_POWERDOWN:
984 /* disable_lcdc(info); */
985 break;
986 case FB_BLANK_UNBLANK:
987 /* fsl_diu_enable_panel(info);*/
988 break;
989 }
990
991 return 0;
992 }
993
994 static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
995 unsigned long arg)
996 {
997 struct mfb_info *mfbi = info->par;
998 struct diu_ad *ad = mfbi->ad;
999 struct mfb_chroma_key ck;
1000 unsigned char global_alpha;
1001 struct aoi_display_offset aoi_d;
1002 __u32 pix_fmt;
1003 void __user *buf = (void __user *)arg;
1004
1005 if (!arg)
1006 return -EINVAL;
1007 switch (cmd) {
1008 case MFB_SET_PIXFMT:
1009 if (copy_from_user(&pix_fmt, buf, sizeof(pix_fmt)))
1010 return -EFAULT;
1011 ad->pix_fmt = pix_fmt;
1012 pr_debug("Set pixel format to 0x%08x\n", ad->pix_fmt);
1013 break;
1014 case MFB_GET_PIXFMT:
1015 pix_fmt = ad->pix_fmt;
1016 if (copy_to_user(buf, &pix_fmt, sizeof(pix_fmt)))
1017 return -EFAULT;
1018 pr_debug("get pixel format 0x%08x\n", ad->pix_fmt);
1019 break;
1020 case MFB_SET_AOID:
1021 if (copy_from_user(&aoi_d, buf, sizeof(aoi_d)))
1022 return -EFAULT;
1023 mfbi->x_aoi_d = aoi_d.x_aoi_d;
1024 mfbi->y_aoi_d = aoi_d.y_aoi_d;
1025 pr_debug("set AOI display offset of index %d to (%d,%d)\n",
1026 mfbi->index, aoi_d.x_aoi_d, aoi_d.y_aoi_d);
1027 fsl_diu_check_var(&info->var, info);
1028 fsl_diu_set_aoi(info);
1029 break;
1030 case MFB_GET_AOID:
1031 aoi_d.x_aoi_d = mfbi->x_aoi_d;
1032 aoi_d.y_aoi_d = mfbi->y_aoi_d;
1033 if (copy_to_user(buf, &aoi_d, sizeof(aoi_d)))
1034 return -EFAULT;
1035 pr_debug("get AOI display offset of index %d (%d,%d)\n",
1036 mfbi->index, aoi_d.x_aoi_d, aoi_d.y_aoi_d);
1037 break;
1038 case MFB_GET_ALPHA:
1039 global_alpha = mfbi->g_alpha;
1040 if (copy_to_user(buf, &global_alpha, sizeof(global_alpha)))
1041 return -EFAULT;
1042 pr_debug("get global alpha of index %d\n", mfbi->index);
1043 break;
1044 case MFB_SET_ALPHA:
1045 /* set panel information */
1046 if (copy_from_user(&global_alpha, buf, sizeof(global_alpha)))
1047 return -EFAULT;
1048 ad->src_size_g_alpha = (ad->src_size_g_alpha & (~0xff)) |
1049 (global_alpha & 0xff);
1050 mfbi->g_alpha = global_alpha;
1051 pr_debug("set global alpha for index %d\n", mfbi->index);
1052 break;
1053 case MFB_SET_CHROMA_KEY:
1054 /* set panel winformation */
1055 if (copy_from_user(&ck, buf, sizeof(ck)))
1056 return -EFAULT;
1057
1058 if (ck.enable &&
1059 (ck.red_max < ck.red_min ||
1060 ck.green_max < ck.green_min ||
1061 ck.blue_max < ck.blue_min))
1062 return -EINVAL;
1063
1064 if (!ck.enable) {
1065 ad->ckmax_r = 0;
1066 ad->ckmax_g = 0;
1067 ad->ckmax_b = 0;
1068 ad->ckmin_r = 255;
1069 ad->ckmin_g = 255;
1070 ad->ckmin_b = 255;
1071 } else {
1072 ad->ckmax_r = ck.red_max;
1073 ad->ckmax_g = ck.green_max;
1074 ad->ckmax_b = ck.blue_max;
1075 ad->ckmin_r = ck.red_min;
1076 ad->ckmin_g = ck.green_min;
1077 ad->ckmin_b = ck.blue_min;
1078 }
1079 pr_debug("set chroma key\n");
1080 break;
1081 case FBIOGET_GWINFO:
1082 if (mfbi->type == MFB_TYPE_OFF)
1083 return -ENODEV;
1084 /* get graphic window information */
1085 if (copy_to_user(buf, ad, sizeof(*ad)))
1086 return -EFAULT;
1087 break;
1088 case FBIOGET_HWCINFO:
1089 pr_debug("FBIOGET_HWCINFO:0x%08x\n", FBIOGET_HWCINFO);
1090 break;
1091 case FBIOPUT_MODEINFO:
1092 pr_debug("FBIOPUT_MODEINFO:0x%08x\n", FBIOPUT_MODEINFO);
1093 break;
1094 case FBIOGET_DISPINFO:
1095 pr_debug("FBIOGET_DISPINFO:0x%08x\n", FBIOGET_DISPINFO);
1096 break;
1097
1098 default:
1099 printk(KERN_ERR "Unknown ioctl command (0x%08X)\n", cmd);
1100 return -ENOIOCTLCMD;
1101 }
1102
1103 return 0;
1104 }
1105
1106 /* turn on fb if count == 1
1107 */
1108 static int fsl_diu_open(struct fb_info *info, int user)
1109 {
1110 struct mfb_info *mfbi = info->par;
1111 int res = 0;
1112
1113 /* free boot splash memory on first /dev/fb0 open */
1114 if (!mfbi->index && diu_ops.release_bootmem)
1115 diu_ops.release_bootmem();
1116
1117 spin_lock(&diu_lock);
1118 mfbi->count++;
1119 if (mfbi->count == 1) {
1120 pr_debug("open plane index %d\n", mfbi->index);
1121 fsl_diu_check_var(&info->var, info);
1122 res = fsl_diu_set_par(info);
1123 if (res < 0)
1124 mfbi->count--;
1125 else {
1126 res = fsl_diu_enable_panel(info);
1127 if (res < 0)
1128 mfbi->count--;
1129 }
1130 }
1131
1132 spin_unlock(&diu_lock);
1133 return res;
1134 }
1135
1136 /* turn off fb if count == 0
1137 */
1138 static int fsl_diu_release(struct fb_info *info, int user)
1139 {
1140 struct mfb_info *mfbi = info->par;
1141 int res = 0;
1142
1143 spin_lock(&diu_lock);
1144 mfbi->count--;
1145 if (mfbi->count == 0) {
1146 pr_debug("release plane index %d\n", mfbi->index);
1147 res = fsl_diu_disable_panel(info);
1148 if (res < 0)
1149 mfbi->count++;
1150 }
1151 spin_unlock(&diu_lock);
1152 return res;
1153 }
1154
1155 static struct fb_ops fsl_diu_ops = {
1156 .owner = THIS_MODULE,
1157 .fb_check_var = fsl_diu_check_var,
1158 .fb_set_par = fsl_diu_set_par,
1159 .fb_setcolreg = fsl_diu_setcolreg,
1160 .fb_blank = fsl_diu_blank,
1161 .fb_pan_display = fsl_diu_pan_display,
1162 .fb_fillrect = cfb_fillrect,
1163 .fb_copyarea = cfb_copyarea,
1164 .fb_imageblit = cfb_imageblit,
1165 .fb_ioctl = fsl_diu_ioctl,
1166 .fb_open = fsl_diu_open,
1167 .fb_release = fsl_diu_release,
1168 };
1169
1170 static int init_fbinfo(struct fb_info *info)
1171 {
1172 struct mfb_info *mfbi = info->par;
1173
1174 info->device = NULL;
1175 info->var.activate = FB_ACTIVATE_NOW;
1176 info->fbops = &fsl_diu_ops;
1177 info->flags = FBINFO_FLAG_DEFAULT;
1178 info->pseudo_palette = &mfbi->pseudo_palette;
1179
1180 /* Allocate colormap */
1181 fb_alloc_cmap(&info->cmap, 16, 0);
1182 return 0;
1183 }
1184
1185 static int __devinit install_fb(struct fb_info *info)
1186 {
1187 int rc;
1188 struct mfb_info *mfbi = info->par;
1189 const char *aoi_mode, *init_aoi_mode = "320x240";
1190 struct fb_videomode *db = fsl_diu_mode_db;
1191 unsigned int dbsize = ARRAY_SIZE(fsl_diu_mode_db);
1192 int has_default_mode = 1;
1193
1194 if (init_fbinfo(info))
1195 return -EINVAL;
1196
1197 if (mfbi->index == 0) { /* plane 0 */
1198 if (mfbi->edid_data) {
1199 /* Now build modedb from EDID */
1200 fb_edid_to_monspecs(mfbi->edid_data, &info->monspecs);
1201 fb_videomode_to_modelist(info->monspecs.modedb,
1202 info->monspecs.modedb_len,
1203 &info->modelist);
1204 db = info->monspecs.modedb;
1205 dbsize = info->monspecs.modedb_len;
1206 }
1207 aoi_mode = fb_mode;
1208 } else {
1209 aoi_mode = init_aoi_mode;
1210 }
1211 pr_debug("mode used = %s\n", aoi_mode);
1212 rc = fb_find_mode(&info->var, info, aoi_mode, db, dbsize,
1213 &fsl_diu_default_mode, default_bpp);
1214 switch (rc) {
1215 case 1:
1216 pr_debug("using mode specified in @mode\n");
1217 break;
1218 case 2:
1219 pr_debug("using mode specified in @mode "
1220 "with ignored refresh rate\n");
1221 break;
1222 case 3:
1223 pr_debug("using mode default mode\n");
1224 break;
1225 case 4:
1226 pr_debug("using mode from list\n");
1227 break;
1228 default:
1229 pr_debug("rc = %d\n", rc);
1230 pr_debug("failed to find mode\n");
1231 /*
1232 * For plane 0 we continue and look into
1233 * driver's internal modedb.
1234 */
1235 if (mfbi->index == 0 && mfbi->edid_data)
1236 has_default_mode = 0;
1237 else
1238 return -EINVAL;
1239 break;
1240 }
1241
1242 if (!has_default_mode) {
1243 rc = fb_find_mode(&info->var, info, aoi_mode, fsl_diu_mode_db,
1244 ARRAY_SIZE(fsl_diu_mode_db),
1245 &fsl_diu_default_mode,
1246 default_bpp);
1247 if (rc > 0 && rc < 5)
1248 has_default_mode = 1;
1249 }
1250
1251 /* Still not found, use preferred mode from database if any */
1252 if (!has_default_mode && info->monspecs.modedb) {
1253 struct fb_monspecs *specs = &info->monspecs;
1254 struct fb_videomode *modedb = &specs->modedb[0];
1255
1256 /*
1257 * Get preferred timing. If not found,
1258 * first mode in database will be used.
1259 */
1260 if (specs->misc & FB_MISC_1ST_DETAIL) {
1261 int i;
1262
1263 for (i = 0; i < specs->modedb_len; i++) {
1264 if (specs->modedb[i].flag & FB_MODE_IS_FIRST) {
1265 modedb = &specs->modedb[i];
1266 break;
1267 }
1268 }
1269 }
1270
1271 info->var.bits_per_pixel = default_bpp;
1272 fb_videomode_to_var(&info->var, modedb);
1273 }
1274
1275 pr_debug("xres_virtual %d\n", info->var.xres_virtual);
1276 pr_debug("bits_per_pixel %d\n", info->var.bits_per_pixel);
1277
1278 pr_debug("info->var.yres_virtual = %d\n", info->var.yres_virtual);
1279 pr_debug("info->fix.line_length = %d\n", info->fix.line_length);
1280
1281 if (mfbi->type == MFB_TYPE_OFF)
1282 mfbi->blank = FB_BLANK_NORMAL;
1283 else
1284 mfbi->blank = FB_BLANK_UNBLANK;
1285
1286 if (fsl_diu_check_var(&info->var, info)) {
1287 printk(KERN_ERR "fb_check_var failed");
1288 fb_dealloc_cmap(&info->cmap);
1289 return -EINVAL;
1290 }
1291
1292 if (register_framebuffer(info) < 0) {
1293 printk(KERN_ERR "register_framebuffer failed");
1294 unmap_video_memory(info);
1295 fb_dealloc_cmap(&info->cmap);
1296 return -EINVAL;
1297 }
1298
1299 mfbi->registered = 1;
1300 printk(KERN_INFO "fb%d: %s fb device registered successfully.\n",
1301 info->node, info->fix.id);
1302
1303 return 0;
1304 }
1305
1306 static void uninstall_fb(struct fb_info *info)
1307 {
1308 struct mfb_info *mfbi = info->par;
1309
1310 if (!mfbi->registered)
1311 return;
1312
1313 if (mfbi->index == 0)
1314 kfree(mfbi->edid_data);
1315
1316 unregister_framebuffer(info);
1317 unmap_video_memory(info);
1318 if (&info->cmap)
1319 fb_dealloc_cmap(&info->cmap);
1320
1321 mfbi->registered = 0;
1322 }
1323
1324 static irqreturn_t fsl_diu_isr(int irq, void *dev_id)
1325 {
1326 struct diu *hw = dr.diu_reg;
1327 unsigned int status = in_be32(&hw->int_status);
1328
1329 if (status) {
1330 /* This is the workaround for underrun */
1331 if (status & INT_UNDRUN) {
1332 out_be32(&hw->diu_mode, 0);
1333 pr_debug("Err: DIU occurs underrun!\n");
1334 udelay(1);
1335 out_be32(&hw->diu_mode, 1);
1336 }
1337 #if defined(CONFIG_NOT_COHERENT_CACHE)
1338 else if (status & INT_VSYNC) {
1339 unsigned int i;
1340 for (i = 0; i < coherence_data_size;
1341 i += d_cache_line_size)
1342 __asm__ __volatile__ (
1343 "dcbz 0, %[input]"
1344 ::[input]"r"(&coherence_data[i]));
1345 }
1346 #endif
1347 return IRQ_HANDLED;
1348 }
1349 return IRQ_NONE;
1350 }
1351
1352 static int request_irq_local(int irq)
1353 {
1354 unsigned long status, ints;
1355 struct diu *hw;
1356 int ret;
1357
1358 hw = dr.diu_reg;
1359
1360 /* Read to clear the status */
1361 status = in_be32(&hw->int_status);
1362
1363 ret = request_irq(irq, fsl_diu_isr, 0, "diu", NULL);
1364 if (ret)
1365 pr_info("Request diu IRQ failed.\n");
1366 else {
1367 ints = INT_PARERR | INT_LS_BF_VS;
1368 #if !defined(CONFIG_NOT_COHERENT_CACHE)
1369 ints |= INT_VSYNC;
1370 #endif
1371 if (dr.mode == MFB_MODE2 || dr.mode == MFB_MODE3)
1372 ints |= INT_VSYNC_WB;
1373
1374 /* Read to clear the status */
1375 status = in_be32(&hw->int_status);
1376 out_be32(&hw->int_mask, ints);
1377 }
1378 return ret;
1379 }
1380
1381 static void free_irq_local(int irq)
1382 {
1383 struct diu *hw = dr.diu_reg;
1384
1385 /* Disable all LCDC interrupt */
1386 out_be32(&hw->int_mask, 0x1f);
1387
1388 free_irq(irq, NULL);
1389 }
1390
1391 #ifdef CONFIG_PM
1392 /*
1393 * Power management hooks. Note that we won't be called from IRQ context,
1394 * unlike the blank functions above, so we may sleep.
1395 */
1396 static int fsl_diu_suspend(struct platform_device *ofdev, pm_message_t state)
1397 {
1398 struct fsl_diu_data *machine_data;
1399
1400 machine_data = dev_get_drvdata(&ofdev->dev);
1401 disable_lcdc(machine_data->fsl_diu_info[0]);
1402
1403 return 0;
1404 }
1405
1406 static int fsl_diu_resume(struct platform_device *ofdev)
1407 {
1408 struct fsl_diu_data *machine_data;
1409
1410 machine_data = dev_get_drvdata(&ofdev->dev);
1411 enable_lcdc(machine_data->fsl_diu_info[0]);
1412
1413 return 0;
1414 }
1415
1416 #else
1417 #define fsl_diu_suspend NULL
1418 #define fsl_diu_resume NULL
1419 #endif /* CONFIG_PM */
1420
1421 /* Align to 64-bit(8-byte), 32-byte, etc. */
1422 static int allocate_buf(struct device *dev, struct diu_addr *buf, u32 size,
1423 u32 bytes_align)
1424 {
1425 u32 offset, ssize;
1426 u32 mask;
1427 dma_addr_t paddr = 0;
1428
1429 ssize = size + bytes_align;
1430 buf->vaddr = dma_alloc_coherent(dev, ssize, &paddr, GFP_DMA |
1431 __GFP_ZERO);
1432 if (!buf->vaddr)
1433 return -ENOMEM;
1434
1435 buf->paddr = (__u32) paddr;
1436
1437 mask = bytes_align - 1;
1438 offset = (u32)buf->paddr & mask;
1439 if (offset) {
1440 buf->offset = bytes_align - offset;
1441 buf->paddr = (u32)buf->paddr + offset;
1442 } else
1443 buf->offset = 0;
1444 return 0;
1445 }
1446
1447 static void free_buf(struct device *dev, struct diu_addr *buf, u32 size,
1448 u32 bytes_align)
1449 {
1450 dma_free_coherent(dev, size + bytes_align,
1451 buf->vaddr, (buf->paddr - buf->offset));
1452 return;
1453 }
1454
1455 static ssize_t store_monitor(struct device *device,
1456 struct device_attribute *attr, const char *buf, size_t count)
1457 {
1458 int old_monitor_port;
1459 unsigned long val;
1460 struct fsl_diu_data *machine_data =
1461 container_of(attr, struct fsl_diu_data, dev_attr);
1462
1463 if (strict_strtoul(buf, 10, &val))
1464 return 0;
1465
1466 old_monitor_port = machine_data->monitor_port;
1467 machine_data->monitor_port = diu_ops.set_sysfs_monitor_port(val);
1468
1469 if (old_monitor_port != machine_data->monitor_port) {
1470 /* All AOIs need adjust pixel format
1471 * fsl_diu_set_par only change the pixsel format here
1472 * unlikely to fail. */
1473 fsl_diu_set_par(machine_data->fsl_diu_info[0]);
1474 fsl_diu_set_par(machine_data->fsl_diu_info[1]);
1475 fsl_diu_set_par(machine_data->fsl_diu_info[2]);
1476 fsl_diu_set_par(machine_data->fsl_diu_info[3]);
1477 fsl_diu_set_par(machine_data->fsl_diu_info[4]);
1478 }
1479 return count;
1480 }
1481
1482 static ssize_t show_monitor(struct device *device,
1483 struct device_attribute *attr, char *buf)
1484 {
1485 struct fsl_diu_data *machine_data =
1486 container_of(attr, struct fsl_diu_data, dev_attr);
1487 return diu_ops.show_monitor_port(machine_data->monitor_port, buf);
1488 }
1489
1490 static int __devinit fsl_diu_probe(struct platform_device *ofdev,
1491 const struct of_device_id *match)
1492 {
1493 struct device_node *np = ofdev->dev.of_node;
1494 struct mfb_info *mfbi;
1495 phys_addr_t dummy_ad_addr;
1496 int ret, i, error = 0;
1497 struct resource res;
1498 struct fsl_diu_data *machine_data;
1499 int diu_mode;
1500
1501 machine_data = kzalloc(sizeof(struct fsl_diu_data), GFP_KERNEL);
1502 if (!machine_data)
1503 return -ENOMEM;
1504
1505 for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++) {
1506 machine_data->fsl_diu_info[i] =
1507 framebuffer_alloc(sizeof(struct mfb_info), &ofdev->dev);
1508 if (!machine_data->fsl_diu_info[i]) {
1509 dev_err(&ofdev->dev, "cannot allocate memory\n");
1510 ret = -ENOMEM;
1511 goto error2;
1512 }
1513 mfbi = machine_data->fsl_diu_info[i]->par;
1514 memcpy(mfbi, &mfb_template[i], sizeof(struct mfb_info));
1515 mfbi->parent = machine_data;
1516
1517 if (mfbi->index == 0) {
1518 const u8 *prop;
1519 int len;
1520
1521 /* Get EDID */
1522 prop = of_get_property(np, "edid", &len);
1523 if (prop && len == EDID_LENGTH)
1524 mfbi->edid_data = kmemdup(prop, EDID_LENGTH,
1525 GFP_KERNEL);
1526 }
1527 }
1528
1529 ret = of_address_to_resource(np, 0, &res);
1530 if (ret) {
1531 dev_err(&ofdev->dev, "could not obtain DIU address\n");
1532 goto error;
1533 }
1534 if (!res.start) {
1535 dev_err(&ofdev->dev, "invalid DIU address\n");
1536 goto error;
1537 }
1538 dev_dbg(&ofdev->dev, "%s, res.start: 0x%08x\n", __func__, res.start);
1539
1540 dr.diu_reg = ioremap(res.start, sizeof(struct diu));
1541 if (!dr.diu_reg) {
1542 dev_err(&ofdev->dev, "Err: can't map DIU registers!\n");
1543 ret = -EFAULT;
1544 goto error2;
1545 }
1546
1547 diu_mode = in_be32(&dr.diu_reg->diu_mode);
1548 if (diu_mode != MFB_MODE1)
1549 out_be32(&dr.diu_reg->diu_mode, 0); /* disable DIU */
1550
1551 /* Get the IRQ of the DIU */
1552 machine_data->irq = irq_of_parse_and_map(np, 0);
1553
1554 if (!machine_data->irq) {
1555 dev_err(&ofdev->dev, "could not get DIU IRQ\n");
1556 ret = -EINVAL;
1557 goto error;
1558 }
1559 machine_data->monitor_port = monitor_port;
1560
1561 /* Area descriptor memory pool aligns to 64-bit boundary */
1562 if (allocate_buf(&ofdev->dev, &pool.ad,
1563 sizeof(struct diu_ad) * FSL_AOI_NUM, 8))
1564 return -ENOMEM;
1565
1566 /* Get memory for Gamma Table - 32-byte aligned memory */
1567 if (allocate_buf(&ofdev->dev, &pool.gamma, 768, 32)) {
1568 ret = -ENOMEM;
1569 goto error;
1570 }
1571
1572 /* For performance, cursor bitmap buffer aligns to 32-byte boundary */
1573 if (allocate_buf(&ofdev->dev, &pool.cursor, MAX_CURS * MAX_CURS * 2,
1574 32)) {
1575 ret = -ENOMEM;
1576 goto error;
1577 }
1578
1579 i = ARRAY_SIZE(machine_data->fsl_diu_info);
1580 machine_data->dummy_ad = (struct diu_ad *)
1581 ((u32)pool.ad.vaddr + pool.ad.offset) + i;
1582 machine_data->dummy_ad->paddr = pool.ad.paddr +
1583 i * sizeof(struct diu_ad);
1584 machine_data->dummy_aoi_virt = fsl_diu_alloc(64, &dummy_ad_addr);
1585 if (!machine_data->dummy_aoi_virt) {
1586 ret = -ENOMEM;
1587 goto error;
1588 }
1589 machine_data->dummy_ad->addr = cpu_to_le32(dummy_ad_addr);
1590 machine_data->dummy_ad->pix_fmt = 0x88882317;
1591 machine_data->dummy_ad->src_size_g_alpha = cpu_to_le32((4 << 12) | 4);
1592 machine_data->dummy_ad->aoi_size = cpu_to_le32((4 << 16) | 2);
1593 machine_data->dummy_ad->offset_xyi = 0;
1594 machine_data->dummy_ad->offset_xyd = 0;
1595 machine_data->dummy_ad->next_ad = 0;
1596
1597 /*
1598 * Let DIU display splash screen if it was pre-initialized
1599 * by the bootloader, set dummy area descriptor otherwise.
1600 */
1601 if (diu_mode != MFB_MODE1)
1602 out_be32(&dr.diu_reg->desc[0], machine_data->dummy_ad->paddr);
1603
1604 out_be32(&dr.diu_reg->desc[1], machine_data->dummy_ad->paddr);
1605 out_be32(&dr.diu_reg->desc[2], machine_data->dummy_ad->paddr);
1606
1607 for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++) {
1608 machine_data->fsl_diu_info[i]->fix.smem_start = 0;
1609 mfbi = machine_data->fsl_diu_info[i]->par;
1610 mfbi->ad = (struct diu_ad *)((u32)pool.ad.vaddr
1611 + pool.ad.offset) + i;
1612 mfbi->ad->paddr = pool.ad.paddr + i * sizeof(struct diu_ad);
1613 ret = install_fb(machine_data->fsl_diu_info[i]);
1614 if (ret) {
1615 dev_err(&ofdev->dev,
1616 "Failed to register framebuffer %d\n",
1617 i);
1618 goto error;
1619 }
1620 }
1621
1622 if (request_irq_local(machine_data->irq)) {
1623 dev_err(machine_data->fsl_diu_info[0]->dev,
1624 "could not request irq for diu.");
1625 goto error;
1626 }
1627
1628 sysfs_attr_init(&machine_data->dev_attr.attr);
1629 machine_data->dev_attr.attr.name = "monitor";
1630 machine_data->dev_attr.attr.mode = S_IRUGO|S_IWUSR;
1631 machine_data->dev_attr.show = show_monitor;
1632 machine_data->dev_attr.store = store_monitor;
1633 error = device_create_file(machine_data->fsl_diu_info[0]->dev,
1634 &machine_data->dev_attr);
1635 if (error) {
1636 dev_err(machine_data->fsl_diu_info[0]->dev,
1637 "could not create sysfs %s file\n",
1638 machine_data->dev_attr.attr.name);
1639 }
1640
1641 dev_set_drvdata(&ofdev->dev, machine_data);
1642 return 0;
1643
1644 error:
1645 for (i = ARRAY_SIZE(machine_data->fsl_diu_info);
1646 i > 0; i--)
1647 uninstall_fb(machine_data->fsl_diu_info[i - 1]);
1648 if (pool.ad.vaddr)
1649 free_buf(&ofdev->dev, &pool.ad,
1650 sizeof(struct diu_ad) * FSL_AOI_NUM, 8);
1651 if (pool.gamma.vaddr)
1652 free_buf(&ofdev->dev, &pool.gamma, 768, 32);
1653 if (pool.cursor.vaddr)
1654 free_buf(&ofdev->dev, &pool.cursor, MAX_CURS * MAX_CURS * 2,
1655 32);
1656 if (machine_data->dummy_aoi_virt)
1657 fsl_diu_free(machine_data->dummy_aoi_virt, 64);
1658 iounmap(dr.diu_reg);
1659
1660 error2:
1661 for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++)
1662 if (machine_data->fsl_diu_info[i])
1663 framebuffer_release(machine_data->fsl_diu_info[i]);
1664 kfree(machine_data);
1665
1666 return ret;
1667 }
1668
1669
1670 static int fsl_diu_remove(struct platform_device *ofdev)
1671 {
1672 struct fsl_diu_data *machine_data;
1673 int i;
1674
1675 machine_data = dev_get_drvdata(&ofdev->dev);
1676 disable_lcdc(machine_data->fsl_diu_info[0]);
1677 free_irq_local(machine_data->irq);
1678 for (i = ARRAY_SIZE(machine_data->fsl_diu_info); i > 0; i--)
1679 uninstall_fb(machine_data->fsl_diu_info[i - 1]);
1680 if (pool.ad.vaddr)
1681 free_buf(&ofdev->dev, &pool.ad,
1682 sizeof(struct diu_ad) * FSL_AOI_NUM, 8);
1683 if (pool.gamma.vaddr)
1684 free_buf(&ofdev->dev, &pool.gamma, 768, 32);
1685 if (pool.cursor.vaddr)
1686 free_buf(&ofdev->dev, &pool.cursor, MAX_CURS * MAX_CURS * 2,
1687 32);
1688 if (machine_data->dummy_aoi_virt)
1689 fsl_diu_free(machine_data->dummy_aoi_virt, 64);
1690 iounmap(dr.diu_reg);
1691 for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++)
1692 if (machine_data->fsl_diu_info[i])
1693 framebuffer_release(machine_data->fsl_diu_info[i]);
1694 kfree(machine_data);
1695
1696 return 0;
1697 }
1698
1699 #ifndef MODULE
1700 static int __init fsl_diu_setup(char *options)
1701 {
1702 char *opt;
1703 unsigned long val;
1704
1705 if (!options || !*options)
1706 return 0;
1707
1708 while ((opt = strsep(&options, ",")) != NULL) {
1709 if (!*opt)
1710 continue;
1711 if (!strncmp(opt, "monitor=", 8)) {
1712 if (!strict_strtoul(opt + 8, 10, &val) && (val <= 2))
1713 monitor_port = val;
1714 } else if (!strncmp(opt, "bpp=", 4)) {
1715 if (!strict_strtoul(opt + 4, 10, &val))
1716 default_bpp = val;
1717 } else
1718 fb_mode = opt;
1719 }
1720
1721 return 0;
1722 }
1723 #endif
1724
1725 static struct of_device_id fsl_diu_match[] = {
1726 #ifdef CONFIG_PPC_MPC512x
1727 {
1728 .compatible = "fsl,mpc5121-diu",
1729 },
1730 #endif
1731 {
1732 .compatible = "fsl,diu",
1733 },
1734 {}
1735 };
1736 MODULE_DEVICE_TABLE(of, fsl_diu_match);
1737
1738 static struct of_platform_driver fsl_diu_driver = {
1739 .driver = {
1740 .name = "fsl_diu",
1741 .owner = THIS_MODULE,
1742 .of_match_table = fsl_diu_match,
1743 },
1744 .probe = fsl_diu_probe,
1745 .remove = fsl_diu_remove,
1746 .suspend = fsl_diu_suspend,
1747 .resume = fsl_diu_resume,
1748 };
1749
1750 static int __init fsl_diu_init(void)
1751 {
1752 #ifdef CONFIG_NOT_COHERENT_CACHE
1753 struct device_node *np;
1754 const u32 *prop;
1755 #endif
1756 int ret;
1757 #ifndef MODULE
1758 char *option;
1759
1760 /*
1761 * For kernel boot options (in 'video=xxxfb:<options>' format)
1762 */
1763 if (fb_get_options("fslfb", &option))
1764 return -ENODEV;
1765 fsl_diu_setup(option);
1766 #endif
1767 printk(KERN_INFO "Freescale DIU driver\n");
1768
1769 #ifdef CONFIG_NOT_COHERENT_CACHE
1770 np = of_find_node_by_type(NULL, "cpu");
1771 if (!np) {
1772 printk(KERN_ERR "Err: can't find device node 'cpu'\n");
1773 return -ENODEV;
1774 }
1775
1776 prop = of_get_property(np, "d-cache-size", NULL);
1777 if (prop == NULL) {
1778 of_node_put(np);
1779 return -ENODEV;
1780 }
1781
1782 /* Freescale PLRU requires 13/8 times the cache size to do a proper
1783 displacement flush
1784 */
1785 coherence_data_size = *prop * 13;
1786 coherence_data_size /= 8;
1787
1788 prop = of_get_property(np, "d-cache-line-size", NULL);
1789 if (prop == NULL) {
1790 of_node_put(np);
1791 return -ENODEV;
1792 }
1793 d_cache_line_size = *prop;
1794
1795 of_node_put(np);
1796 coherence_data = vmalloc(coherence_data_size);
1797 if (!coherence_data)
1798 return -ENOMEM;
1799 #endif
1800 ret = of_register_platform_driver(&fsl_diu_driver);
1801 if (ret) {
1802 printk(KERN_ERR
1803 "fsl-diu: failed to register platform driver\n");
1804 #if defined(CONFIG_NOT_COHERENT_CACHE)
1805 vfree(coherence_data);
1806 #endif
1807 iounmap(dr.diu_reg);
1808 }
1809 return ret;
1810 }
1811
1812 static void __exit fsl_diu_exit(void)
1813 {
1814 of_unregister_platform_driver(&fsl_diu_driver);
1815 #if defined(CONFIG_NOT_COHERENT_CACHE)
1816 vfree(coherence_data);
1817 #endif
1818 }
1819
1820 module_init(fsl_diu_init);
1821 module_exit(fsl_diu_exit);
1822
1823 MODULE_AUTHOR("York Sun <yorksun@freescale.com>");
1824 MODULE_DESCRIPTION("Freescale DIU framebuffer driver");
1825 MODULE_LICENSE("GPL");
1826
1827 module_param_named(mode, fb_mode, charp, 0);
1828 MODULE_PARM_DESC(mode,
1829 "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
1830 module_param_named(bpp, default_bpp, ulong, 0);
1831 MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified mode");
1832 module_param_named(monitor, monitor_port, int, 0);
1833 MODULE_PARM_DESC(monitor,
1834 "Specify the monitor port (0, 1 or 2) if supported by the platform");
1835
Linus' kernel tree