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ar9170usb: fix panic triggered by undersized rxstream buffer
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / video / fsl-diu-fb.c
blob994358a4f30298d9684148db609a8c15723de82c
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 u32 smem_len = info->fix.line_length * info->var.yres_virtual;
754
755 pr_debug("info->var.xres_virtual = %d\n", info->var.xres_virtual);
756 pr_debug("info->var.yres_virtual = %d\n", info->var.yres_virtual);
757 pr_debug("info->fix.line_length = %d\n", info->fix.line_length);
758 pr_debug("MAP_VIDEO_MEMORY: smem_len = %u\n", smem_len);
759
760 info->screen_base = fsl_diu_alloc(smem_len, &phys);
761 if (info->screen_base == NULL) {
762 printk(KERN_ERR "Unable to allocate fb memory\n");
763 return -ENOMEM;
764 }
765 mutex_lock(&info->mm_lock);
766 info->fix.smem_start = (unsigned long) phys;
767 info->fix.smem_len = smem_len;
768 mutex_unlock(&info->mm_lock);
769 info->screen_size = info->fix.smem_len;
770
771 pr_debug("Allocated fb @ paddr=0x%08lx, size=%d.\n",
772 info->fix.smem_start, info->fix.smem_len);
773 pr_debug("screen base %p\n", info->screen_base);
774
775 return 0;
776 }
777
778 static void unmap_video_memory(struct fb_info *info)
779 {
780 fsl_diu_free(info->screen_base, info->fix.smem_len);
781 mutex_lock(&info->mm_lock);
782 info->screen_base = NULL;
783 info->fix.smem_start = 0;
784 info->fix.smem_len = 0;
785 mutex_unlock(&info->mm_lock);
786 }
787
788 /*
789 * Using the fb_var_screeninfo in fb_info we set the aoi of this
790 * particular framebuffer. It is a light version of fsl_diu_set_par.
791 */
792 static int fsl_diu_set_aoi(struct fb_info *info)
793 {
794 struct fb_var_screeninfo *var = &info->var;
795 struct mfb_info *mfbi = info->par;
796 struct diu_ad *ad = mfbi->ad;
797
798 /* AOI should not be greater than display size */
799 ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
800 ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
801 return 0;
802 }
803
804 /*
805 * Using the fb_var_screeninfo in fb_info we set the resolution of this
806 * particular framebuffer. This function alters the fb_fix_screeninfo stored
807 * in fb_info. It does not alter var in fb_info since we are using that
808 * data. This means we depend on the data in var inside fb_info to be
809 * supported by the hardware. fsl_diu_check_var is always called before
810 * fsl_diu_set_par to ensure this.
811 */
812 static int fsl_diu_set_par(struct fb_info *info)
813 {
814 unsigned long len;
815 struct fb_var_screeninfo *var = &info->var;
816 struct mfb_info *mfbi = info->par;
817 struct fsl_diu_data *machine_data = mfbi->parent;
818 struct diu_ad *ad = mfbi->ad;
819 struct diu *hw;
820
821 hw = dr.diu_reg;
822
823 set_fix(info);
824 mfbi->cursor_reset = 1;
825
826 len = info->var.yres_virtual * info->fix.line_length;
827 /* Alloc & dealloc each time resolution/bpp change */
828 if (len != info->fix.smem_len) {
829 if (info->fix.smem_start)
830 unmap_video_memory(info);
831 pr_debug("SET PAR: smem_len = %d\n", info->fix.smem_len);
832
833 /* Memory allocation for framebuffer */
834 if (map_video_memory(info)) {
835 printk(KERN_ERR "Unable to allocate fb memory 1\n");
836 return -ENOMEM;
837 }
838 }
839
840 ad->pix_fmt =
841 diu_ops.get_pixel_format(var->bits_per_pixel,
842 machine_data->monitor_port);
843 ad->addr = cpu_to_le32(info->fix.smem_start);
844 ad->src_size_g_alpha = cpu_to_le32((var->yres_virtual << 12) |
845 var->xres_virtual) | mfbi->g_alpha;
846 /* AOI should not be greater than display size */
847 ad->aoi_size = cpu_to_le32((var->yres << 16) | var->xres);
848 ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
849 ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
850
851 /* Disable chroma keying function */
852 ad->ckmax_r = 0;
853 ad->ckmax_g = 0;
854 ad->ckmax_b = 0;
855
856 ad->ckmin_r = 255;
857 ad->ckmin_g = 255;
858 ad->ckmin_b = 255;
859
860 if (mfbi->index == 0)
861 update_lcdc(info);
862 return 0;
863 }
864
865 static inline __u32 CNVT_TOHW(__u32 val, __u32 width)
866 {
867 return ((val<<width) + 0x7FFF - val)>>16;
868 }
869
870 /*
871 * Set a single color register. The values supplied have a 16 bit magnitude
872 * which needs to be scaled in this function for the hardware. Things to take
873 * into consideration are how many color registers, if any, are supported with
874 * the current color visual. With truecolor mode no color palettes are
875 * supported. Here a psuedo palette is created which we store the value in
876 * pseudo_palette in struct fb_info. For pseudocolor mode we have a limited
877 * color palette.
878 */
879 static int fsl_diu_setcolreg(unsigned regno, unsigned red, unsigned green,
880 unsigned blue, unsigned transp, struct fb_info *info)
881 {
882 int ret = 1;
883
884 /*
885 * If greyscale is true, then we convert the RGB value
886 * to greyscale no matter what visual we are using.
887 */
888 if (info->var.grayscale)
889 red = green = blue = (19595 * red + 38470 * green +
890 7471 * blue) >> 16;
891 switch (info->fix.visual) {
892 case FB_VISUAL_TRUECOLOR:
893 /*
894 * 16-bit True Colour. We encode the RGB value
895 * according to the RGB bitfield information.
896 */
897 if (regno < 16) {
898 u32 *pal = info->pseudo_palette;
899 u32 v;
900
901 red = CNVT_TOHW(red, info->var.red.length);
902 green = CNVT_TOHW(green, info->var.green.length);
903 blue = CNVT_TOHW(blue, info->var.blue.length);
904 transp = CNVT_TOHW(transp, info->var.transp.length);
905
906 v = (red << info->var.red.offset) |
907 (green << info->var.green.offset) |
908 (blue << info->var.blue.offset) |
909 (transp << info->var.transp.offset);
910
911 pal[regno] = v;
912 ret = 0;
913 }
914 break;
915 case FB_VISUAL_STATIC_PSEUDOCOLOR:
916 case FB_VISUAL_PSEUDOCOLOR:
917 break;
918 }
919
920 return ret;
921 }
922
923 /*
924 * Pan (or wrap, depending on the `vmode' field) the display using the
925 * 'xoffset' and 'yoffset' fields of the 'var' structure. If the values
926 * don't fit, return -EINVAL.
927 */
928 static int fsl_diu_pan_display(struct fb_var_screeninfo *var,
929 struct fb_info *info)
930 {
931 if ((info->var.xoffset == var->xoffset) &&
932 (info->var.yoffset == var->yoffset))
933 return 0; /* No change, do nothing */
934
935 if (var->xoffset < 0 || var->yoffset < 0
936 || var->xoffset + info->var.xres > info->var.xres_virtual
937 || var->yoffset + info->var.yres > info->var.yres_virtual)
938 return -EINVAL;
939
940 info->var.xoffset = var->xoffset;
941 info->var.yoffset = var->yoffset;
942
943 if (var->vmode & FB_VMODE_YWRAP)
944 info->var.vmode |= FB_VMODE_YWRAP;
945 else
946 info->var.vmode &= ~FB_VMODE_YWRAP;
947
948 fsl_diu_set_aoi(info);
949
950 return 0;
951 }
952
953 /*
954 * Blank the screen if blank_mode != 0, else unblank. Return 0 if blanking
955 * succeeded, != 0 if un-/blanking failed.
956 * blank_mode == 2: suspend vsync
957 * blank_mode == 3: suspend hsync
958 * blank_mode == 4: powerdown
959 */
960 static int fsl_diu_blank(int blank_mode, struct fb_info *info)
961 {
962 struct mfb_info *mfbi = info->par;
963
964 mfbi->blank = blank_mode;
965
966 switch (blank_mode) {
967 case FB_BLANK_VSYNC_SUSPEND:
968 case FB_BLANK_HSYNC_SUSPEND:
969 /* FIXME: fixes to enable_panel and enable lcdc needed */
970 case FB_BLANK_NORMAL:
971 /* fsl_diu_disable_panel(info);*/
972 break;
973 case FB_BLANK_POWERDOWN:
974 /* disable_lcdc(info); */
975 break;
976 case FB_BLANK_UNBLANK:
977 /* fsl_diu_enable_panel(info);*/
978 break;
979 }
980
981 return 0;
982 }
983
984 static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
985 unsigned long arg)
986 {
987 struct mfb_info *mfbi = info->par;
988 struct diu_ad *ad = mfbi->ad;
989 struct mfb_chroma_key ck;
990 unsigned char global_alpha;
991 struct aoi_display_offset aoi_d;
992 __u32 pix_fmt;
993 void __user *buf = (void __user *)arg;
994
995 if (!arg)
996 return -EINVAL;
997 switch (cmd) {
998 case MFB_SET_PIXFMT:
999 if (copy_from_user(&pix_fmt, buf, sizeof(pix_fmt)))
1000 return -EFAULT;
1001 ad->pix_fmt = pix_fmt;
1002 pr_debug("Set pixel format to 0x%08x\n", ad->pix_fmt);
1003 break;
1004 case MFB_GET_PIXFMT:
1005 pix_fmt = ad->pix_fmt;
1006 if (copy_to_user(buf, &pix_fmt, sizeof(pix_fmt)))
1007 return -EFAULT;
1008 pr_debug("get pixel format 0x%08x\n", ad->pix_fmt);
1009 break;
1010 case MFB_SET_AOID:
1011 if (copy_from_user(&aoi_d, buf, sizeof(aoi_d)))
1012 return -EFAULT;
1013 mfbi->x_aoi_d = aoi_d.x_aoi_d;
1014 mfbi->y_aoi_d = aoi_d.y_aoi_d;
1015 pr_debug("set AOI display offset of index %d to (%d,%d)\n",
1016 mfbi->index, aoi_d.x_aoi_d, aoi_d.y_aoi_d);
1017 fsl_diu_check_var(&info->var, info);
1018 fsl_diu_set_aoi(info);
1019 break;
1020 case MFB_GET_AOID:
1021 aoi_d.x_aoi_d = mfbi->x_aoi_d;
1022 aoi_d.y_aoi_d = mfbi->y_aoi_d;
1023 if (copy_to_user(buf, &aoi_d, sizeof(aoi_d)))
1024 return -EFAULT;
1025 pr_debug("get AOI display offset of index %d (%d,%d)\n",
1026 mfbi->index, aoi_d.x_aoi_d, aoi_d.y_aoi_d);
1027 break;
1028 case MFB_GET_ALPHA:
1029 global_alpha = mfbi->g_alpha;
1030 if (copy_to_user(buf, &global_alpha, sizeof(global_alpha)))
1031 return -EFAULT;
1032 pr_debug("get global alpha of index %d\n", mfbi->index);
1033 break;
1034 case MFB_SET_ALPHA:
1035 /* set panel information */
1036 if (copy_from_user(&global_alpha, buf, sizeof(global_alpha)))
1037 return -EFAULT;
1038 ad->src_size_g_alpha = (ad->src_size_g_alpha & (~0xff)) |
1039 (global_alpha & 0xff);
1040 mfbi->g_alpha = global_alpha;
1041 pr_debug("set global alpha for index %d\n", mfbi->index);
1042 break;
1043 case MFB_SET_CHROMA_KEY:
1044 /* set panel winformation */
1045 if (copy_from_user(&ck, buf, sizeof(ck)))
1046 return -EFAULT;
1047
1048 if (ck.enable &&
1049 (ck.red_max < ck.red_min ||
1050 ck.green_max < ck.green_min ||
1051 ck.blue_max < ck.blue_min))
1052 return -EINVAL;
1053
1054 if (!ck.enable) {
1055 ad->ckmax_r = 0;
1056 ad->ckmax_g = 0;
1057 ad->ckmax_b = 0;
1058 ad->ckmin_r = 255;
1059 ad->ckmin_g = 255;
1060 ad->ckmin_b = 255;
1061 } else {
1062 ad->ckmax_r = ck.red_max;
1063 ad->ckmax_g = ck.green_max;
1064 ad->ckmax_b = ck.blue_max;
1065 ad->ckmin_r = ck.red_min;
1066 ad->ckmin_g = ck.green_min;
1067 ad->ckmin_b = ck.blue_min;
1068 }
1069 pr_debug("set chroma key\n");
1070 break;
1071 case FBIOGET_GWINFO:
1072 if (mfbi->type == MFB_TYPE_OFF)
1073 return -ENODEV;
1074 /* get graphic window information */
1075 if (copy_to_user(buf, ad, sizeof(*ad)))
1076 return -EFAULT;
1077 break;
1078 case FBIOGET_HWCINFO:
1079 pr_debug("FBIOGET_HWCINFO:0x%08x\n", FBIOGET_HWCINFO);
1080 break;
1081 case FBIOPUT_MODEINFO:
1082 pr_debug("FBIOPUT_MODEINFO:0x%08x\n", FBIOPUT_MODEINFO);
1083 break;
1084 case FBIOGET_DISPINFO:
1085 pr_debug("FBIOGET_DISPINFO:0x%08x\n", FBIOGET_DISPINFO);
1086 break;
1087
1088 default:
1089 printk(KERN_ERR "Unknown ioctl command (0x%08X)\n", cmd);
1090 return -ENOIOCTLCMD;
1091 }
1092
1093 return 0;
1094 }
1095
1096 /* turn on fb if count == 1
1097 */
1098 static int fsl_diu_open(struct fb_info *info, int user)
1099 {
1100 struct mfb_info *mfbi = info->par;
1101 int res = 0;
1102
1103 spin_lock(&diu_lock);
1104 mfbi->count++;
1105 if (mfbi->count == 1) {
1106 pr_debug("open plane index %d\n", mfbi->index);
1107 fsl_diu_check_var(&info->var, info);
1108 res = fsl_diu_set_par(info);
1109 if (res < 0)
1110 mfbi->count--;
1111 else {
1112 res = fsl_diu_enable_panel(info);
1113 if (res < 0)
1114 mfbi->count--;
1115 }
1116 }
1117
1118 spin_unlock(&diu_lock);
1119 return res;
1120 }
1121
1122 /* turn off fb if count == 0
1123 */
1124 static int fsl_diu_release(struct fb_info *info, int user)
1125 {
1126 struct mfb_info *mfbi = info->par;
1127 int res = 0;
1128
1129 spin_lock(&diu_lock);
1130 mfbi->count--;
1131 if (mfbi->count == 0) {
1132 pr_debug("release plane index %d\n", mfbi->index);
1133 res = fsl_diu_disable_panel(info);
1134 if (res < 0)
1135 mfbi->count++;
1136 }
1137 spin_unlock(&diu_lock);
1138 return res;
1139 }
1140
1141 static struct fb_ops fsl_diu_ops = {
1142 .owner = THIS_MODULE,
1143 .fb_check_var = fsl_diu_check_var,
1144 .fb_set_par = fsl_diu_set_par,
1145 .fb_setcolreg = fsl_diu_setcolreg,
1146 .fb_blank = fsl_diu_blank,
1147 .fb_pan_display = fsl_diu_pan_display,
1148 .fb_fillrect = cfb_fillrect,
1149 .fb_copyarea = cfb_copyarea,
1150 .fb_imageblit = cfb_imageblit,
1151 .fb_ioctl = fsl_diu_ioctl,
1152 .fb_open = fsl_diu_open,
1153 .fb_release = fsl_diu_release,
1154 };
1155
1156 static int init_fbinfo(struct fb_info *info)
1157 {
1158 struct mfb_info *mfbi = info->par;
1159
1160 info->device = NULL;
1161 info->var.activate = FB_ACTIVATE_NOW;
1162 info->fbops = &fsl_diu_ops;
1163 info->flags = FBINFO_FLAG_DEFAULT;
1164 info->pseudo_palette = &mfbi->pseudo_palette;
1165
1166 /* Allocate colormap */
1167 fb_alloc_cmap(&info->cmap, 16, 0);
1168 return 0;
1169 }
1170
1171 static int __devinit install_fb(struct fb_info *info)
1172 {
1173 int rc;
1174 struct mfb_info *mfbi = info->par;
1175 const char *aoi_mode, *init_aoi_mode = "320x240";
1176
1177 if (init_fbinfo(info))
1178 return -EINVAL;
1179
1180 if (mfbi->index == 0) /* plane 0 */
1181 aoi_mode = fb_mode;
1182 else
1183 aoi_mode = init_aoi_mode;
1184 pr_debug("mode used = %s\n", aoi_mode);
1185 rc = fb_find_mode(&info->var, info, aoi_mode, fsl_diu_mode_db,
1186 ARRAY_SIZE(fsl_diu_mode_db), &fsl_diu_default_mode, default_bpp);
1187
1188 switch (rc) {
1189 case 1:
1190 pr_debug("using mode specified in @mode\n");
1191 break;
1192 case 2:
1193 pr_debug("using mode specified in @mode "
1194 "with ignored refresh rate\n");
1195 break;
1196 case 3:
1197 pr_debug("using mode default mode\n");
1198 break;
1199 case 4:
1200 pr_debug("using mode from list\n");
1201 break;
1202 default:
1203 pr_debug("rc = %d\n", rc);
1204 pr_debug("failed to find mode\n");
1205 return -EINVAL;
1206 break;
1207 }
1208
1209 pr_debug("xres_virtual %d\n", info->var.xres_virtual);
1210 pr_debug("bits_per_pixel %d\n", info->var.bits_per_pixel);
1211
1212 pr_debug("info->var.yres_virtual = %d\n", info->var.yres_virtual);
1213 pr_debug("info->fix.line_length = %d\n", info->fix.line_length);
1214
1215 if (mfbi->type == MFB_TYPE_OFF)
1216 mfbi->blank = FB_BLANK_NORMAL;
1217 else
1218 mfbi->blank = FB_BLANK_UNBLANK;
1219
1220 if (fsl_diu_check_var(&info->var, info)) {
1221 printk(KERN_ERR "fb_check_var failed");
1222 fb_dealloc_cmap(&info->cmap);
1223 return -EINVAL;
1224 }
1225
1226 if (register_framebuffer(info) < 0) {
1227 printk(KERN_ERR "register_framebuffer failed");
1228 unmap_video_memory(info);
1229 fb_dealloc_cmap(&info->cmap);
1230 return -EINVAL;
1231 }
1232
1233 mfbi->registered = 1;
1234 printk(KERN_INFO "fb%d: %s fb device registered successfully.\n",
1235 info->node, info->fix.id);
1236
1237 return 0;
1238 }
1239
1240 static void uninstall_fb(struct fb_info *info)
1241 {
1242 struct mfb_info *mfbi = info->par;
1243
1244 if (!mfbi->registered)
1245 return;
1246
1247 unregister_framebuffer(info);
1248 unmap_video_memory(info);
1249 if (&info->cmap)
1250 fb_dealloc_cmap(&info->cmap);
1251
1252 mfbi->registered = 0;
1253 }
1254
1255 static irqreturn_t fsl_diu_isr(int irq, void *dev_id)
1256 {
1257 struct diu *hw = dr.diu_reg;
1258 unsigned int status = in_be32(&hw->int_status);
1259
1260 if (status) {
1261 /* This is the workaround for underrun */
1262 if (status & INT_UNDRUN) {
1263 out_be32(&hw->diu_mode, 0);
1264 pr_debug("Err: DIU occurs underrun!\n");
1265 udelay(1);
1266 out_be32(&hw->diu_mode, 1);
1267 }
1268 #if defined(CONFIG_NOT_COHERENT_CACHE)
1269 else if (status & INT_VSYNC) {
1270 unsigned int i;
1271 for (i = 0; i < coherence_data_size;
1272 i += d_cache_line_size)
1273 __asm__ __volatile__ (
1274 "dcbz 0, %[input]"
1275 ::[input]"r"(&coherence_data[i]));
1276 }
1277 #endif
1278 return IRQ_HANDLED;
1279 }
1280 return IRQ_NONE;
1281 }
1282
1283 static int request_irq_local(int irq)
1284 {
1285 unsigned long status, ints;
1286 struct diu *hw;
1287 int ret;
1288
1289 hw = dr.diu_reg;
1290
1291 /* Read to clear the status */
1292 status = in_be32(&hw->int_status);
1293
1294 ret = request_irq(irq, fsl_diu_isr, 0, "diu", NULL);
1295 if (ret)
1296 pr_info("Request diu IRQ failed.\n");
1297 else {
1298 ints = INT_PARERR | INT_LS_BF_VS;
1299 #if !defined(CONFIG_NOT_COHERENT_CACHE)
1300 ints |= INT_VSYNC;
1301 #endif
1302 if (dr.mode == MFB_MODE2 || dr.mode == MFB_MODE3)
1303 ints |= INT_VSYNC_WB;
1304
1305 /* Read to clear the status */
1306 status = in_be32(&hw->int_status);
1307 out_be32(&hw->int_mask, ints);
1308 }
1309 return ret;
1310 }
1311
1312 static void free_irq_local(int irq)
1313 {
1314 struct diu *hw = dr.diu_reg;
1315
1316 /* Disable all LCDC interrupt */
1317 out_be32(&hw->int_mask, 0x1f);
1318
1319 free_irq(irq, NULL);
1320 }
1321
1322 #ifdef CONFIG_PM
1323 /*
1324 * Power management hooks. Note that we won't be called from IRQ context,
1325 * unlike the blank functions above, so we may sleep.
1326 */
1327 static int fsl_diu_suspend(struct of_device *ofdev, pm_message_t state)
1328 {
1329 struct fsl_diu_data *machine_data;
1330
1331 machine_data = dev_get_drvdata(&ofdev->dev);
1332 disable_lcdc(machine_data->fsl_diu_info[0]);
1333
1334 return 0;
1335 }
1336
1337 static int fsl_diu_resume(struct of_device *ofdev)
1338 {
1339 struct fsl_diu_data *machine_data;
1340
1341 machine_data = dev_get_drvdata(&ofdev->dev);
1342 enable_lcdc(machine_data->fsl_diu_info[0]);
1343
1344 return 0;
1345 }
1346
1347 #else
1348 #define fsl_diu_suspend NULL
1349 #define fsl_diu_resume NULL
1350 #endif /* CONFIG_PM */
1351
1352 /* Align to 64-bit(8-byte), 32-byte, etc. */
1353 static int allocate_buf(struct device *dev, struct diu_addr *buf, u32 size,
1354 u32 bytes_align)
1355 {
1356 u32 offset, ssize;
1357 u32 mask;
1358 dma_addr_t paddr = 0;
1359
1360 ssize = size + bytes_align;
1361 buf->vaddr = dma_alloc_coherent(dev, ssize, &paddr, GFP_DMA |
1362 __GFP_ZERO);
1363 if (!buf->vaddr)
1364 return -ENOMEM;
1365
1366 buf->paddr = (__u32) paddr;
1367
1368 mask = bytes_align - 1;
1369 offset = (u32)buf->paddr & mask;
1370 if (offset) {
1371 buf->offset = bytes_align - offset;
1372 buf->paddr = (u32)buf->paddr + offset;
1373 } else
1374 buf->offset = 0;
1375 return 0;
1376 }
1377
1378 static void free_buf(struct device *dev, struct diu_addr *buf, u32 size,
1379 u32 bytes_align)
1380 {
1381 dma_free_coherent(dev, 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(&ofdev->dev, &pool.ad,
1480 sizeof(struct diu_ad) * FSL_AOI_NUM, 8))
1481 return -ENOMEM;
1482
1483 /* Get memory for Gamma Table - 32-byte aligned memory */
1484 if (allocate_buf(&ofdev->dev, &pool.gamma, 768, 32)) {
1485 ret = -ENOMEM;
1486 goto error;
1487 }
1488
1489 /* For performance, cursor bitmap buffer aligns to 32-byte boundary */
1490 if (allocate_buf(&ofdev->dev, &pool.cursor, MAX_CURS * MAX_CURS * 2,
1491 32)) {
1492 ret = -ENOMEM;
1493 goto error;
1494 }
1495
1496 i = ARRAY_SIZE(machine_data->fsl_diu_info);
1497 machine_data->dummy_ad = (struct diu_ad *)
1498 ((u32)pool.ad.vaddr + pool.ad.offset) + i;
1499 machine_data->dummy_ad->paddr = pool.ad.paddr +
1500 i * sizeof(struct diu_ad);
1501 machine_data->dummy_aoi_virt = fsl_diu_alloc(64, &dummy_ad_addr);
1502 if (!machine_data->dummy_aoi_virt) {
1503 ret = -ENOMEM;
1504 goto error;
1505 }
1506 machine_data->dummy_ad->addr = cpu_to_le32(dummy_ad_addr);
1507 machine_data->dummy_ad->pix_fmt = 0x88882317;
1508 machine_data->dummy_ad->src_size_g_alpha = cpu_to_le32((4 << 12) | 4);
1509 machine_data->dummy_ad->aoi_size = cpu_to_le32((4 << 16) | 2);
1510 machine_data->dummy_ad->offset_xyi = 0;
1511 machine_data->dummy_ad->offset_xyd = 0;
1512 machine_data->dummy_ad->next_ad = 0;
1513
1514 out_be32(&dr.diu_reg->desc[0], machine_data->dummy_ad->paddr);
1515 out_be32(&dr.diu_reg->desc[1], machine_data->dummy_ad->paddr);
1516 out_be32(&dr.diu_reg->desc[2], machine_data->dummy_ad->paddr);
1517
1518 for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++) {
1519 machine_data->fsl_diu_info[i]->fix.smem_start = 0;
1520 mfbi = machine_data->fsl_diu_info[i]->par;
1521 mfbi->ad = (struct diu_ad *)((u32)pool.ad.vaddr
1522 + pool.ad.offset) + i;
1523 mfbi->ad->paddr = pool.ad.paddr + i * sizeof(struct diu_ad);
1524 ret = install_fb(machine_data->fsl_diu_info[i]);
1525 if (ret) {
1526 dev_err(&ofdev->dev,
1527 "Failed to register framebuffer %d\n",
1528 i);
1529 goto error;
1530 }
1531 }
1532
1533 if (request_irq_local(machine_data->irq)) {
1534 dev_err(machine_data->fsl_diu_info[0]->dev,
1535 "could not request irq for diu.");
1536 goto error;
1537 }
1538
1539 sysfs_attr_init(&machine_data->dev_attr.attr);
1540 machine_data->dev_attr.attr.name = "monitor";
1541 machine_data->dev_attr.attr.mode = S_IRUGO|S_IWUSR;
1542 machine_data->dev_attr.show = show_monitor;
1543 machine_data->dev_attr.store = store_monitor;
1544 error = device_create_file(machine_data->fsl_diu_info[0]->dev,
1545 &machine_data->dev_attr);
1546 if (error) {
1547 dev_err(machine_data->fsl_diu_info[0]->dev,
1548 "could not create sysfs %s file\n",
1549 machine_data->dev_attr.attr.name);
1550 }
1551
1552 dev_set_drvdata(&ofdev->dev, machine_data);
1553 return 0;
1554
1555 error:
1556 for (i = ARRAY_SIZE(machine_data->fsl_diu_info);
1557 i > 0; i--)
1558 uninstall_fb(machine_data->fsl_diu_info[i - 1]);
1559 if (pool.ad.vaddr)
1560 free_buf(&ofdev->dev, &pool.ad,
1561 sizeof(struct diu_ad) * FSL_AOI_NUM, 8);
1562 if (pool.gamma.vaddr)
1563 free_buf(&ofdev->dev, &pool.gamma, 768, 32);
1564 if (pool.cursor.vaddr)
1565 free_buf(&ofdev->dev, &pool.cursor, MAX_CURS * MAX_CURS * 2,
1566 32);
1567 if (machine_data->dummy_aoi_virt)
1568 fsl_diu_free(machine_data->dummy_aoi_virt, 64);
1569 iounmap(dr.diu_reg);
1570
1571 error2:
1572 for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++)
1573 if (machine_data->fsl_diu_info[i])
1574 framebuffer_release(machine_data->fsl_diu_info[i]);
1575 kfree(machine_data);
1576
1577 return ret;
1578 }
1579
1580
1581 static int fsl_diu_remove(struct of_device *ofdev)
1582 {
1583 struct fsl_diu_data *machine_data;
1584 int i;
1585
1586 machine_data = dev_get_drvdata(&ofdev->dev);
1587 disable_lcdc(machine_data->fsl_diu_info[0]);
1588 free_irq_local(machine_data->irq);
1589 for (i = ARRAY_SIZE(machine_data->fsl_diu_info); i > 0; i--)
1590 uninstall_fb(machine_data->fsl_diu_info[i - 1]);
1591 if (pool.ad.vaddr)
1592 free_buf(&ofdev->dev, &pool.ad,
1593 sizeof(struct diu_ad) * FSL_AOI_NUM, 8);
1594 if (pool.gamma.vaddr)
1595 free_buf(&ofdev->dev, &pool.gamma, 768, 32);
1596 if (pool.cursor.vaddr)
1597 free_buf(&ofdev->dev, &pool.cursor, MAX_CURS * MAX_CURS * 2,
1598 32);
1599 if (machine_data->dummy_aoi_virt)
1600 fsl_diu_free(machine_data->dummy_aoi_virt, 64);
1601 iounmap(dr.diu_reg);
1602 for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++)
1603 if (machine_data->fsl_diu_info[i])
1604 framebuffer_release(machine_data->fsl_diu_info[i]);
1605 kfree(machine_data);
1606
1607 return 0;
1608 }
1609
1610 #ifndef MODULE
1611 static int __init fsl_diu_setup(char *options)
1612 {
1613 char *opt;
1614 unsigned long val;
1615
1616 if (!options || !*options)
1617 return 0;
1618
1619 while ((opt = strsep(&options, ",")) != NULL) {
1620 if (!*opt)
1621 continue;
1622 if (!strncmp(opt, "monitor=", 8)) {
1623 if (!strict_strtoul(opt + 8, 10, &val) && (val <= 2))
1624 monitor_port = val;
1625 } else if (!strncmp(opt, "bpp=", 4)) {
1626 if (!strict_strtoul(opt + 4, 10, &val))
1627 default_bpp = val;
1628 } else
1629 fb_mode = opt;
1630 }
1631
1632 return 0;
1633 }
1634 #endif
1635
1636 static struct of_device_id fsl_diu_match[] = {
1637 #ifdef CONFIG_PPC_MPC512x
1638 {
1639 .compatible = "fsl,mpc5121-diu",
1640 },
1641 #endif
1642 {
1643 .compatible = "fsl,diu",
1644 },
1645 {}
1646 };
1647 MODULE_DEVICE_TABLE(of, fsl_diu_match);
1648
1649 static struct of_platform_driver fsl_diu_driver = {
1650 .owner = THIS_MODULE,
1651 .name = "fsl_diu",
1652 .match_table = fsl_diu_match,
1653 .probe = fsl_diu_probe,
1654 .remove = fsl_diu_remove,
1655 .suspend = fsl_diu_suspend,
1656 .resume = fsl_diu_resume,
1657 };
1658
1659 static int __init fsl_diu_init(void)
1660 {
1661 #ifdef CONFIG_NOT_COHERENT_CACHE
1662 struct device_node *np;
1663 const u32 *prop;
1664 #endif
1665 int ret;
1666 #ifndef MODULE
1667 char *option;
1668
1669 /*
1670 * For kernel boot options (in 'video=xxxfb:<options>' format)
1671 */
1672 if (fb_get_options("fslfb", &option))
1673 return -ENODEV;
1674 fsl_diu_setup(option);
1675 #endif
1676 printk(KERN_INFO "Freescale DIU driver\n");
1677
1678 #ifdef CONFIG_NOT_COHERENT_CACHE
1679 np = of_find_node_by_type(NULL, "cpu");
1680 if (!np) {
1681 printk(KERN_ERR "Err: can't find device node 'cpu'\n");
1682 return -ENODEV;
1683 }
1684
1685 prop = of_get_property(np, "d-cache-size", NULL);
1686 if (prop == NULL) {
1687 of_node_put(np);
1688 return -ENODEV;
1689 }
1690
1691 /* Freescale PLRU requires 13/8 times the cache size to do a proper
1692 displacement flush
1693 */
1694 coherence_data_size = *prop * 13;
1695 coherence_data_size /= 8;
1696
1697 prop = of_get_property(np, "d-cache-line-size", NULL);
1698 if (prop == NULL) {
1699 of_node_put(np);
1700 return -ENODEV;
1701 }
1702 d_cache_line_size = *prop;
1703
1704 of_node_put(np);
1705 coherence_data = vmalloc(coherence_data_size);
1706 if (!coherence_data)
1707 return -ENOMEM;
1708 #endif
1709 ret = of_register_platform_driver(&fsl_diu_driver);
1710 if (ret) {
1711 printk(KERN_ERR
1712 "fsl-diu: failed to register platform driver\n");
1713 #if defined(CONFIG_NOT_COHERENT_CACHE)
1714 vfree(coherence_data);
1715 #endif
1716 iounmap(dr.diu_reg);
1717 }
1718 return ret;
1719 }
1720
1721 static void __exit fsl_diu_exit(void)
1722 {
1723 of_unregister_platform_driver(&fsl_diu_driver);
1724 #if defined(CONFIG_NOT_COHERENT_CACHE)
1725 vfree(coherence_data);
1726 #endif
1727 }
1728
1729 module_init(fsl_diu_init);
1730 module_exit(fsl_diu_exit);
1731
1732 MODULE_AUTHOR("York Sun <yorksun@freescale.com>");
1733 MODULE_DESCRIPTION("Freescale DIU framebuffer driver");
1734 MODULE_LICENSE("GPL");
1735
1736 module_param_named(mode, fb_mode, charp, 0);
1737 MODULE_PARM_DESC(mode,
1738 "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
1739 module_param_named(bpp, default_bpp, ulong, 0);
1740 MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified mode");
1741 module_param_named(monitor, monitor_port, int, 0);
1742 MODULE_PARM_DESC(monitor,
1743 "Specify the monitor port (0, 1 or 2) if supported by the platform");
1744
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