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Merge branch 'rcu/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck...
[linux-2.6.git] / drivers / video / fsl-diu-fb.c
blob6c278056fc60c858209b987f97163b1901f4d61f
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 #include <linux/spinlock.h>
34
35 #include <sysdev/fsl_soc.h>
36 #include <linux/fsl-diu-fb.h>
37 #include "edid.h"
38
39 #define NUM_AOIS 5 /* 1 for plane 0, 2 for planes 1 & 2 each */
40
41 /* HW cursor parameters */
42 #define MAX_CURS 32
43
44 /* INT_STATUS/INT_MASK field descriptions */
45 #define INT_VSYNC 0x01 /* Vsync interrupt */
46 #define INT_VSYNC_WB 0x02 /* Vsync interrupt for write back operation */
47 #define INT_UNDRUN 0x04 /* Under run exception interrupt */
48 #define INT_PARERR 0x08 /* Display parameters error interrupt */
49 #define INT_LS_BF_VS 0x10 /* Lines before vsync. interrupt */
50
51 /*
52 * List of supported video modes
53 *
54 * The first entry is the default video mode. The remain entries are in
55 * order if increasing resolution and frequency. The 320x240-60 mode is
56 * the initial AOI for the second and third planes.
57 */
58 static struct fb_videomode fsl_diu_mode_db[] = {
59 {
60 .refresh = 60,
61 .xres = 1024,
62 .yres = 768,
63 .pixclock = 15385,
64 .left_margin = 160,
65 .right_margin = 24,
66 .upper_margin = 29,
67 .lower_margin = 3,
68 .hsync_len = 136,
69 .vsync_len = 6,
70 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
71 .vmode = FB_VMODE_NONINTERLACED
72 },
73 {
74 .refresh = 60,
75 .xres = 320,
76 .yres = 240,
77 .pixclock = 79440,
78 .left_margin = 16,
79 .right_margin = 16,
80 .upper_margin = 16,
81 .lower_margin = 5,
82 .hsync_len = 48,
83 .vsync_len = 1,
84 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
85 .vmode = FB_VMODE_NONINTERLACED
86 },
87 {
88 .refresh = 60,
89 .xres = 640,
90 .yres = 480,
91 .pixclock = 39722,
92 .left_margin = 48,
93 .right_margin = 16,
94 .upper_margin = 33,
95 .lower_margin = 10,
96 .hsync_len = 96,
97 .vsync_len = 2,
98 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
99 .vmode = FB_VMODE_NONINTERLACED
100 },
101 {
102 .refresh = 72,
103 .xres = 640,
104 .yres = 480,
105 .pixclock = 32052,
106 .left_margin = 128,
107 .right_margin = 24,
108 .upper_margin = 28,
109 .lower_margin = 9,
110 .hsync_len = 40,
111 .vsync_len = 3,
112 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
113 .vmode = FB_VMODE_NONINTERLACED
114 },
115 {
116 .refresh = 75,
117 .xres = 640,
118 .yres = 480,
119 .pixclock = 31747,
120 .left_margin = 120,
121 .right_margin = 16,
122 .upper_margin = 16,
123 .lower_margin = 1,
124 .hsync_len = 64,
125 .vsync_len = 3,
126 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
127 .vmode = FB_VMODE_NONINTERLACED
128 },
129 {
130 .refresh = 90,
131 .xres = 640,
132 .yres = 480,
133 .pixclock = 25057,
134 .left_margin = 120,
135 .right_margin = 32,
136 .upper_margin = 14,
137 .lower_margin = 25,
138 .hsync_len = 40,
139 .vsync_len = 14,
140 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
141 .vmode = FB_VMODE_NONINTERLACED
142 },
143 {
144 .refresh = 100,
145 .xres = 640,
146 .yres = 480,
147 .pixclock = 22272,
148 .left_margin = 48,
149 .right_margin = 32,
150 .upper_margin = 17,
151 .lower_margin = 22,
152 .hsync_len = 128,
153 .vsync_len = 12,
154 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
155 .vmode = FB_VMODE_NONINTERLACED
156 },
157 {
158 .refresh = 60,
159 .xres = 800,
160 .yres = 480,
161 .pixclock = 33805,
162 .left_margin = 96,
163 .right_margin = 24,
164 .upper_margin = 10,
165 .lower_margin = 3,
166 .hsync_len = 72,
167 .vsync_len = 7,
168 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
169 .vmode = FB_VMODE_NONINTERLACED
170 },
171 {
172 .refresh = 60,
173 .xres = 800,
174 .yres = 600,
175 .pixclock = 25000,
176 .left_margin = 88,
177 .right_margin = 40,
178 .upper_margin = 23,
179 .lower_margin = 1,
180 .hsync_len = 128,
181 .vsync_len = 4,
182 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
183 .vmode = FB_VMODE_NONINTERLACED
184 },
185 {
186 .refresh = 60,
187 .xres = 854,
188 .yres = 480,
189 .pixclock = 31518,
190 .left_margin = 104,
191 .right_margin = 16,
192 .upper_margin = 13,
193 .lower_margin = 1,
194 .hsync_len = 88,
195 .vsync_len = 3,
196 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
197 .vmode = FB_VMODE_NONINTERLACED
198 },
199 {
200 .refresh = 70,
201 .xres = 1024,
202 .yres = 768,
203 .pixclock = 16886,
204 .left_margin = 3,
205 .right_margin = 3,
206 .upper_margin = 2,
207 .lower_margin = 2,
208 .hsync_len = 40,
209 .vsync_len = 18,
210 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
211 .vmode = FB_VMODE_NONINTERLACED
212 },
213 {
214 .refresh = 75,
215 .xres = 1024,
216 .yres = 768,
217 .pixclock = 15009,
218 .left_margin = 3,
219 .right_margin = 3,
220 .upper_margin = 2,
221 .lower_margin = 2,
222 .hsync_len = 80,
223 .vsync_len = 32,
224 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
225 .vmode = FB_VMODE_NONINTERLACED
226 },
227 {
228 .refresh = 60,
229 .xres = 1280,
230 .yres = 480,
231 .pixclock = 18939,
232 .left_margin = 353,
233 .right_margin = 47,
234 .upper_margin = 39,
235 .lower_margin = 4,
236 .hsync_len = 8,
237 .vsync_len = 2,
238 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
239 .vmode = FB_VMODE_NONINTERLACED
240 },
241 {
242 .refresh = 60,
243 .xres = 1280,
244 .yres = 720,
245 .pixclock = 13426,
246 .left_margin = 192,
247 .right_margin = 64,
248 .upper_margin = 22,
249 .lower_margin = 1,
250 .hsync_len = 136,
251 .vsync_len = 3,
252 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
253 .vmode = FB_VMODE_NONINTERLACED
254 },
255 {
256 .refresh = 60,
257 .xres = 1280,
258 .yres = 1024,
259 .pixclock = 9375,
260 .left_margin = 38,
261 .right_margin = 128,
262 .upper_margin = 2,
263 .lower_margin = 7,
264 .hsync_len = 216,
265 .vsync_len = 37,
266 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
267 .vmode = FB_VMODE_NONINTERLACED
268 },
269 {
270 .refresh = 70,
271 .xres = 1280,
272 .yres = 1024,
273 .pixclock = 9380,
274 .left_margin = 6,
275 .right_margin = 6,
276 .upper_margin = 4,
277 .lower_margin = 4,
278 .hsync_len = 60,
279 .vsync_len = 94,
280 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
281 .vmode = FB_VMODE_NONINTERLACED
282 },
283 {
284 .refresh = 75,
285 .xres = 1280,
286 .yres = 1024,
287 .pixclock = 9380,
288 .left_margin = 6,
289 .right_margin = 6,
290 .upper_margin = 4,
291 .lower_margin = 4,
292 .hsync_len = 60,
293 .vsync_len = 15,
294 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
295 .vmode = FB_VMODE_NONINTERLACED
296 },
297 {
298 .refresh = 60,
299 .xres = 1920,
300 .yres = 1080,
301 .pixclock = 5787,
302 .left_margin = 328,
303 .right_margin = 120,
304 .upper_margin = 34,
305 .lower_margin = 1,
306 .hsync_len = 208,
307 .vsync_len = 3,
308 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
309 .vmode = FB_VMODE_NONINTERLACED
310 },
311 };
312
313 static char *fb_mode;
314 static unsigned long default_bpp = 32;
315 static enum fsl_diu_monitor_port monitor_port;
316 static char *monitor_string;
317
318 #if defined(CONFIG_NOT_COHERENT_CACHE)
319 static u8 *coherence_data;
320 static size_t coherence_data_size;
321 static unsigned int d_cache_line_size;
322 #endif
323
324 static DEFINE_SPINLOCK(diu_lock);
325
326 enum mfb_index {
327 PLANE0 = 0, /* Plane 0, only one AOI that fills the screen */
328 PLANE1_AOI0, /* Plane 1, first AOI */
329 PLANE1_AOI1, /* Plane 1, second AOI */
330 PLANE2_AOI0, /* Plane 2, first AOI */
331 PLANE2_AOI1, /* Plane 2, second AOI */
332 };
333
334 struct mfb_info {
335 enum mfb_index index;
336 char *id;
337 int registered;
338 unsigned long pseudo_palette[16];
339 struct diu_ad *ad;
340 unsigned char g_alpha;
341 unsigned int count;
342 int x_aoi_d; /* aoi display x offset to physical screen */
343 int y_aoi_d; /* aoi display y offset to physical screen */
344 struct fsl_diu_data *parent;
345 };
346
347 /**
348 * struct fsl_diu_data - per-DIU data structure
349 * @dma_addr: DMA address of this structure
350 * @fsl_diu_info: fb_info objects, one per AOI
351 * @dev_attr: sysfs structure
352 * @irq: IRQ
353 * @monitor_port: the monitor port this DIU is connected to
354 * @diu_reg: pointer to the DIU hardware registers
355 * @reg_lock: spinlock for register access
356 * @dummy_aoi: video buffer for the 4x4 32-bit dummy AOI
357 * dummy_ad: DIU Area Descriptor for the dummy AOI
358 * @ad[]: Area Descriptors for each real AOI
359 * @gamma: gamma color table
360 * @cursor: hardware cursor data
361 *
362 * This data structure must be allocated with 32-byte alignment, so that the
363 * internal fields can be aligned properly.
364 */
365 struct fsl_diu_data {
366 dma_addr_t dma_addr;
367 struct fb_info fsl_diu_info[NUM_AOIS];
368 struct mfb_info mfb[NUM_AOIS];
369 struct device_attribute dev_attr;
370 unsigned int irq;
371 enum fsl_diu_monitor_port monitor_port;
372 struct diu __iomem *diu_reg;
373 spinlock_t reg_lock;
374 u8 dummy_aoi[4 * 4 * 4];
375 struct diu_ad dummy_ad __aligned(8);
376 struct diu_ad ad[NUM_AOIS] __aligned(8);
377 u8 gamma[256 * 3] __aligned(32);
378 /* It's easier to parse the cursor data as little-endian */
379 __le16 cursor[MAX_CURS * MAX_CURS] __aligned(32);
380 /* Blank cursor data -- used to hide the cursor */
381 __le16 blank_cursor[MAX_CURS * MAX_CURS] __aligned(32);
382 uint8_t edid_data[EDID_LENGTH];
383 bool has_edid;
384 } __aligned(32);
385
386 /* Determine the DMA address of a member of the fsl_diu_data structure */
387 #define DMA_ADDR(p, f) ((p)->dma_addr + offsetof(struct fsl_diu_data, f))
388
389 static struct mfb_info mfb_template[] = {
390 {
391 .index = PLANE0,
392 .id = "Panel0",
393 .registered = 0,
394 .count = 0,
395 .x_aoi_d = 0,
396 .y_aoi_d = 0,
397 },
398 {
399 .index = PLANE1_AOI0,
400 .id = "Panel1 AOI0",
401 .registered = 0,
402 .g_alpha = 0xff,
403 .count = 0,
404 .x_aoi_d = 0,
405 .y_aoi_d = 0,
406 },
407 {
408 .index = PLANE1_AOI1,
409 .id = "Panel1 AOI1",
410 .registered = 0,
411 .g_alpha = 0xff,
412 .count = 0,
413 .x_aoi_d = 0,
414 .y_aoi_d = 480,
415 },
416 {
417 .index = PLANE2_AOI0,
418 .id = "Panel2 AOI0",
419 .registered = 0,
420 .g_alpha = 0xff,
421 .count = 0,
422 .x_aoi_d = 640,
423 .y_aoi_d = 0,
424 },
425 {
426 .index = PLANE2_AOI1,
427 .id = "Panel2 AOI1",
428 .registered = 0,
429 .g_alpha = 0xff,
430 .count = 0,
431 .x_aoi_d = 640,
432 .y_aoi_d = 480,
433 },
434 };
435
436 #ifdef DEBUG
437 static void __attribute__ ((unused)) fsl_diu_dump(struct diu __iomem *hw)
438 {
439 mb();
440 pr_debug("DIU: desc=%08x,%08x,%08x, gamma=%08x pallete=%08x "
441 "cursor=%08x curs_pos=%08x diu_mode=%08x bgnd=%08x "
442 "disp_size=%08x hsyn_para=%08x vsyn_para=%08x syn_pol=%08x "
443 "thresholds=%08x int_mask=%08x plut=%08x\n",
444 hw->desc[0], hw->desc[1], hw->desc[2], hw->gamma,
445 hw->pallete, hw->cursor, hw->curs_pos, hw->diu_mode,
446 hw->bgnd, hw->disp_size, hw->hsyn_para, hw->vsyn_para,
447 hw->syn_pol, hw->thresholds, hw->int_mask, hw->plut);
448 rmb();
449 }
450 #endif
451
452 /**
453 * fsl_diu_name_to_port - convert a port name to a monitor port enum
454 *
455 * Takes the name of a monitor port ("dvi", "lvds", or "dlvds") and returns
456 * the enum fsl_diu_monitor_port that corresponds to that string.
457 *
458 * For compatibility with older versions, a number ("0", "1", or "2") is also
459 * supported.
460 *
461 * If the string is unknown, DVI is assumed.
462 *
463 * If the particular port is not supported by the platform, another port
464 * (platform-specific) is chosen instead.
465 */
466 static enum fsl_diu_monitor_port fsl_diu_name_to_port(const char *s)
467 {
468 enum fsl_diu_monitor_port port = FSL_DIU_PORT_DVI;
469 unsigned long val;
470
471 if (s) {
472 if (!strict_strtoul(s, 10, &val) && (val <= 2))
473 port = (enum fsl_diu_monitor_port) val;
474 else if (strncmp(s, "lvds", 4) == 0)
475 port = FSL_DIU_PORT_LVDS;
476 else if (strncmp(s, "dlvds", 5) == 0)
477 port = FSL_DIU_PORT_DLVDS;
478 }
479
480 return diu_ops.valid_monitor_port(port);
481 }
482
483 /*
484 * Workaround for failed writing desc register of planes.
485 * Needed with MPC5121 DIU rev 2.0 silicon.
486 */
487 void wr_reg_wa(u32 *reg, u32 val)
488 {
489 do {
490 out_be32(reg, val);
491 } while (in_be32(reg) != val);
492 }
493
494 static void fsl_diu_enable_panel(struct fb_info *info)
495 {
496 struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
497 struct diu_ad *ad = mfbi->ad;
498 struct fsl_diu_data *data = mfbi->parent;
499 struct diu __iomem *hw = data->diu_reg;
500
501 switch (mfbi->index) {
502 case PLANE0:
503 wr_reg_wa(&hw->desc[0], ad->paddr);
504 break;
505 case PLANE1_AOI0:
506 cmfbi = &data->mfb[2];
507 if (hw->desc[1] != ad->paddr) { /* AOI0 closed */
508 if (cmfbi->count > 0) /* AOI1 open */
509 ad->next_ad =
510 cpu_to_le32(cmfbi->ad->paddr);
511 else
512 ad->next_ad = 0;
513 wr_reg_wa(&hw->desc[1], ad->paddr);
514 }
515 break;
516 case PLANE2_AOI0:
517 cmfbi = &data->mfb[4];
518 if (hw->desc[2] != ad->paddr) { /* AOI0 closed */
519 if (cmfbi->count > 0) /* AOI1 open */
520 ad->next_ad =
521 cpu_to_le32(cmfbi->ad->paddr);
522 else
523 ad->next_ad = 0;
524 wr_reg_wa(&hw->desc[2], ad->paddr);
525 }
526 break;
527 case PLANE1_AOI1:
528 pmfbi = &data->mfb[1];
529 ad->next_ad = 0;
530 if (hw->desc[1] == data->dummy_ad.paddr)
531 wr_reg_wa(&hw->desc[1], ad->paddr);
532 else /* AOI0 open */
533 pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
534 break;
535 case PLANE2_AOI1:
536 pmfbi = &data->mfb[3];
537 ad->next_ad = 0;
538 if (hw->desc[2] == data->dummy_ad.paddr)
539 wr_reg_wa(&hw->desc[2], ad->paddr);
540 else /* AOI0 was open */
541 pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
542 break;
543 }
544 }
545
546 static void fsl_diu_disable_panel(struct fb_info *info)
547 {
548 struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
549 struct diu_ad *ad = mfbi->ad;
550 struct fsl_diu_data *data = mfbi->parent;
551 struct diu __iomem *hw = data->diu_reg;
552
553 switch (mfbi->index) {
554 case PLANE0:
555 wr_reg_wa(&hw->desc[0], 0);
556 break;
557 case PLANE1_AOI0:
558 cmfbi = &data->mfb[2];
559 if (cmfbi->count > 0) /* AOI1 is open */
560 wr_reg_wa(&hw->desc[1], cmfbi->ad->paddr);
561 /* move AOI1 to the first */
562 else /* AOI1 was closed */
563 wr_reg_wa(&hw->desc[1], data->dummy_ad.paddr);
564 /* close AOI 0 */
565 break;
566 case PLANE2_AOI0:
567 cmfbi = &data->mfb[4];
568 if (cmfbi->count > 0) /* AOI1 is open */
569 wr_reg_wa(&hw->desc[2], cmfbi->ad->paddr);
570 /* move AOI1 to the first */
571 else /* AOI1 was closed */
572 wr_reg_wa(&hw->desc[2], data->dummy_ad.paddr);
573 /* close AOI 0 */
574 break;
575 case PLANE1_AOI1:
576 pmfbi = &data->mfb[1];
577 if (hw->desc[1] != ad->paddr) {
578 /* AOI1 is not the first in the chain */
579 if (pmfbi->count > 0)
580 /* AOI0 is open, must be the first */
581 pmfbi->ad->next_ad = 0;
582 } else /* AOI1 is the first in the chain */
583 wr_reg_wa(&hw->desc[1], data->dummy_ad.paddr);
584 /* close AOI 1 */
585 break;
586 case PLANE2_AOI1:
587 pmfbi = &data->mfb[3];
588 if (hw->desc[2] != ad->paddr) {
589 /* AOI1 is not the first in the chain */
590 if (pmfbi->count > 0)
591 /* AOI0 is open, must be the first */
592 pmfbi->ad->next_ad = 0;
593 } else /* AOI1 is the first in the chain */
594 wr_reg_wa(&hw->desc[2], data->dummy_ad.paddr);
595 /* close AOI 1 */
596 break;
597 }
598 }
599
600 static void enable_lcdc(struct fb_info *info)
601 {
602 struct mfb_info *mfbi = info->par;
603 struct fsl_diu_data *data = mfbi->parent;
604 struct diu __iomem *hw = data->diu_reg;
605
606 out_be32(&hw->diu_mode, MFB_MODE1);
607 }
608
609 static void disable_lcdc(struct fb_info *info)
610 {
611 struct mfb_info *mfbi = info->par;
612 struct fsl_diu_data *data = mfbi->parent;
613 struct diu __iomem *hw = data->diu_reg;
614
615 out_be32(&hw->diu_mode, 0);
616 }
617
618 static void adjust_aoi_size_position(struct fb_var_screeninfo *var,
619 struct fb_info *info)
620 {
621 struct mfb_info *lower_aoi_mfbi, *upper_aoi_mfbi, *mfbi = info->par;
622 struct fsl_diu_data *data = mfbi->parent;
623 int available_height, upper_aoi_bottom;
624 enum mfb_index index = mfbi->index;
625 int lower_aoi_is_open, upper_aoi_is_open;
626 __u32 base_plane_width, base_plane_height, upper_aoi_height;
627
628 base_plane_width = data->fsl_diu_info[0].var.xres;
629 base_plane_height = data->fsl_diu_info[0].var.yres;
630
631 if (mfbi->x_aoi_d < 0)
632 mfbi->x_aoi_d = 0;
633 if (mfbi->y_aoi_d < 0)
634 mfbi->y_aoi_d = 0;
635 switch (index) {
636 case PLANE0:
637 if (mfbi->x_aoi_d != 0)
638 mfbi->x_aoi_d = 0;
639 if (mfbi->y_aoi_d != 0)
640 mfbi->y_aoi_d = 0;
641 break;
642 case PLANE1_AOI0:
643 case PLANE2_AOI0:
644 lower_aoi_mfbi = data->fsl_diu_info[index+1].par;
645 lower_aoi_is_open = lower_aoi_mfbi->count > 0 ? 1 : 0;
646 if (var->xres > base_plane_width)
647 var->xres = base_plane_width;
648 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
649 mfbi->x_aoi_d = base_plane_width - var->xres;
650
651 if (lower_aoi_is_open)
652 available_height = lower_aoi_mfbi->y_aoi_d;
653 else
654 available_height = base_plane_height;
655 if (var->yres > available_height)
656 var->yres = available_height;
657 if ((mfbi->y_aoi_d + var->yres) > available_height)
658 mfbi->y_aoi_d = available_height - var->yres;
659 break;
660 case PLANE1_AOI1:
661 case PLANE2_AOI1:
662 upper_aoi_mfbi = data->fsl_diu_info[index-1].par;
663 upper_aoi_height = data->fsl_diu_info[index-1].var.yres;
664 upper_aoi_bottom = upper_aoi_mfbi->y_aoi_d + upper_aoi_height;
665 upper_aoi_is_open = upper_aoi_mfbi->count > 0 ? 1 : 0;
666 if (var->xres > base_plane_width)
667 var->xres = base_plane_width;
668 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
669 mfbi->x_aoi_d = base_plane_width - var->xres;
670 if (mfbi->y_aoi_d < 0)
671 mfbi->y_aoi_d = 0;
672 if (upper_aoi_is_open) {
673 if (mfbi->y_aoi_d < upper_aoi_bottom)
674 mfbi->y_aoi_d = upper_aoi_bottom;
675 available_height = base_plane_height
676 - upper_aoi_bottom;
677 } else
678 available_height = base_plane_height;
679 if (var->yres > available_height)
680 var->yres = available_height;
681 if ((mfbi->y_aoi_d + var->yres) > base_plane_height)
682 mfbi->y_aoi_d = base_plane_height - var->yres;
683 break;
684 }
685 }
686 /*
687 * Checks to see if the hardware supports the state requested by var passed
688 * in. This function does not alter the hardware state! If the var passed in
689 * is slightly off by what the hardware can support then we alter the var
690 * PASSED in to what we can do. If the hardware doesn't support mode change
691 * a -EINVAL will be returned by the upper layers.
692 */
693 static int fsl_diu_check_var(struct fb_var_screeninfo *var,
694 struct fb_info *info)
695 {
696 if (var->xres_virtual < var->xres)
697 var->xres_virtual = var->xres;
698 if (var->yres_virtual < var->yres)
699 var->yres_virtual = var->yres;
700
701 if (var->xoffset < 0)
702 var->xoffset = 0;
703
704 if (var->yoffset < 0)
705 var->yoffset = 0;
706
707 if (var->xoffset + info->var.xres > info->var.xres_virtual)
708 var->xoffset = info->var.xres_virtual - info->var.xres;
709
710 if (var->yoffset + info->var.yres > info->var.yres_virtual)
711 var->yoffset = info->var.yres_virtual - info->var.yres;
712
713 if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
714 (var->bits_per_pixel != 16))
715 var->bits_per_pixel = default_bpp;
716
717 switch (var->bits_per_pixel) {
718 case 16:
719 var->red.length = 5;
720 var->red.offset = 11;
721 var->red.msb_right = 0;
722
723 var->green.length = 6;
724 var->green.offset = 5;
725 var->green.msb_right = 0;
726
727 var->blue.length = 5;
728 var->blue.offset = 0;
729 var->blue.msb_right = 0;
730
731 var->transp.length = 0;
732 var->transp.offset = 0;
733 var->transp.msb_right = 0;
734 break;
735 case 24:
736 var->red.length = 8;
737 var->red.offset = 0;
738 var->red.msb_right = 0;
739
740 var->green.length = 8;
741 var->green.offset = 8;
742 var->green.msb_right = 0;
743
744 var->blue.length = 8;
745 var->blue.offset = 16;
746 var->blue.msb_right = 0;
747
748 var->transp.length = 0;
749 var->transp.offset = 0;
750 var->transp.msb_right = 0;
751 break;
752 case 32:
753 var->red.length = 8;
754 var->red.offset = 16;
755 var->red.msb_right = 0;
756
757 var->green.length = 8;
758 var->green.offset = 8;
759 var->green.msb_right = 0;
760
761 var->blue.length = 8;
762 var->blue.offset = 0;
763 var->blue.msb_right = 0;
764
765 var->transp.length = 8;
766 var->transp.offset = 24;
767 var->transp.msb_right = 0;
768
769 break;
770 }
771
772 var->height = -1;
773 var->width = -1;
774 var->grayscale = 0;
775
776 /* Copy nonstd field to/from sync for fbset usage */
777 var->sync |= var->nonstd;
778 var->nonstd |= var->sync;
779
780 adjust_aoi_size_position(var, info);
781 return 0;
782 }
783
784 static void set_fix(struct fb_info *info)
785 {
786 struct fb_fix_screeninfo *fix = &info->fix;
787 struct fb_var_screeninfo *var = &info->var;
788 struct mfb_info *mfbi = info->par;
789
790 strncpy(fix->id, mfbi->id, sizeof(fix->id));
791 fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
792 fix->type = FB_TYPE_PACKED_PIXELS;
793 fix->accel = FB_ACCEL_NONE;
794 fix->visual = FB_VISUAL_TRUECOLOR;
795 fix->xpanstep = 1;
796 fix->ypanstep = 1;
797 }
798
799 static void update_lcdc(struct fb_info *info)
800 {
801 struct fb_var_screeninfo *var = &info->var;
802 struct mfb_info *mfbi = info->par;
803 struct fsl_diu_data *data = mfbi->parent;
804 struct diu __iomem *hw;
805 int i, j;
806 u8 *gamma_table_base;
807
808 u32 temp;
809
810 hw = data->diu_reg;
811
812 if (diu_ops.set_monitor_port)
813 diu_ops.set_monitor_port(data->monitor_port);
814 gamma_table_base = data->gamma;
815
816 /* Prep for DIU init - gamma table, cursor table */
817
818 for (i = 0; i <= 2; i++)
819 for (j = 0; j <= 255; j++)
820 *gamma_table_base++ = j;
821
822 if (diu_ops.set_gamma_table)
823 diu_ops.set_gamma_table(data->monitor_port, data->gamma);
824
825 disable_lcdc(info);
826
827 /* Program DIU registers */
828
829 out_be32(&hw->gamma, DMA_ADDR(data, gamma));
830
831 out_be32(&hw->bgnd, 0x007F7F7F); /* Set background to grey */
832 out_be32(&hw->disp_size, (var->yres << 16) | var->xres);
833
834 /* Horizontal and vertical configuration register */
835 temp = var->left_margin << 22 | /* BP_H */
836 var->hsync_len << 11 | /* PW_H */
837 var->right_margin; /* FP_H */
838
839 out_be32(&hw->hsyn_para, temp);
840
841 temp = var->upper_margin << 22 | /* BP_V */
842 var->vsync_len << 11 | /* PW_V */
843 var->lower_margin; /* FP_V */
844
845 out_be32(&hw->vsyn_para, temp);
846
847 diu_ops.set_pixel_clock(var->pixclock);
848
849 #ifndef CONFIG_PPC_MPC512x
850 /*
851 * The PLUT register is defined differently on the MPC5121 than it
852 * is on other SOCs. Unfortunately, there's no documentation that
853 * explains how it's supposed to be programmed, so for now, we leave
854 * it at the default value on the MPC5121.
855 *
856 * For other SOCs, program it for the highest priority, which will
857 * reduce the chance of underrun. Technically, we should scale the
858 * priority to match the screen resolution, but doing that properly
859 * requires delicate fine-tuning for each use-case.
860 */
861 out_be32(&hw->plut, 0x01F5F666);
862 #endif
863
864 /* Enable the DIU */
865 enable_lcdc(info);
866 }
867
868 static int map_video_memory(struct fb_info *info)
869 {
870 u32 smem_len = info->fix.line_length * info->var.yres_virtual;
871 void *p;
872
873 p = alloc_pages_exact(smem_len, GFP_DMA | __GFP_ZERO);
874 if (!p) {
875 dev_err(info->dev, "unable to allocate fb memory\n");
876 return -ENOMEM;
877 }
878 mutex_lock(&info->mm_lock);
879 info->screen_base = p;
880 info->fix.smem_start = virt_to_phys(info->screen_base);
881 info->fix.smem_len = smem_len;
882 mutex_unlock(&info->mm_lock);
883 info->screen_size = info->fix.smem_len;
884
885 return 0;
886 }
887
888 static void unmap_video_memory(struct fb_info *info)
889 {
890 void *p = info->screen_base;
891 size_t l = info->fix.smem_len;
892
893 mutex_lock(&info->mm_lock);
894 info->screen_base = NULL;
895 info->fix.smem_start = 0;
896 info->fix.smem_len = 0;
897 mutex_unlock(&info->mm_lock);
898
899 if (p)
900 free_pages_exact(p, l);
901 }
902
903 /*
904 * Using the fb_var_screeninfo in fb_info we set the aoi of this
905 * particular framebuffer. It is a light version of fsl_diu_set_par.
906 */
907 static int fsl_diu_set_aoi(struct fb_info *info)
908 {
909 struct fb_var_screeninfo *var = &info->var;
910 struct mfb_info *mfbi = info->par;
911 struct diu_ad *ad = mfbi->ad;
912
913 /* AOI should not be greater than display size */
914 ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
915 ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
916 return 0;
917 }
918
919 /**
920 * fsl_diu_get_pixel_format: return the pixel format for a given color depth
921 *
922 * The pixel format is a 32-bit value that determine which bits in each
923 * pixel are to be used for each color. This is the default function used
924 * if the platform does not define its own version.
925 */
926 static u32 fsl_diu_get_pixel_format(unsigned int bits_per_pixel)
927 {
928 #define PF_BYTE_F 0x10000000
929 #define PF_ALPHA_C_MASK 0x0E000000
930 #define PF_ALPHA_C_SHIFT 25
931 #define PF_BLUE_C_MASK 0x01800000
932 #define PF_BLUE_C_SHIFT 23
933 #define PF_GREEN_C_MASK 0x00600000
934 #define PF_GREEN_C_SHIFT 21
935 #define PF_RED_C_MASK 0x00180000
936 #define PF_RED_C_SHIFT 19
937 #define PF_PALETTE 0x00040000
938 #define PF_PIXEL_S_MASK 0x00030000
939 #define PF_PIXEL_S_SHIFT 16
940 #define PF_COMP_3_MASK 0x0000F000
941 #define PF_COMP_3_SHIFT 12
942 #define PF_COMP_2_MASK 0x00000F00
943 #define PF_COMP_2_SHIFT 8
944 #define PF_COMP_1_MASK 0x000000F0
945 #define PF_COMP_1_SHIFT 4
946 #define PF_COMP_0_MASK 0x0000000F
947 #define PF_COMP_0_SHIFT 0
948
949 #define MAKE_PF(alpha, red, green, blue, size, c0, c1, c2, c3) \
950 cpu_to_le32(PF_BYTE_F | (alpha << PF_ALPHA_C_SHIFT) | \
951 (blue << PF_BLUE_C_SHIFT) | (green << PF_GREEN_C_SHIFT) | \
952 (red << PF_RED_C_SHIFT) | (c3 << PF_COMP_3_SHIFT) | \
953 (c2 << PF_COMP_2_SHIFT) | (c1 << PF_COMP_1_SHIFT) | \
954 (c0 << PF_COMP_0_SHIFT) | (size << PF_PIXEL_S_SHIFT))
955
956 switch (bits_per_pixel) {
957 case 32:
958 /* 0x88883316 */
959 return MAKE_PF(3, 2, 1, 0, 3, 8, 8, 8, 8);
960 case 24:
961 /* 0x88082219 */
962 return MAKE_PF(4, 0, 1, 2, 2, 8, 8, 8, 0);
963 case 16:
964 /* 0x65053118 */
965 return MAKE_PF(4, 2, 1, 0, 1, 5, 6, 5, 0);
966 default:
967 pr_err("fsl-diu: unsupported color depth %u\n", bits_per_pixel);
968 return 0;
969 }
970 }
971
972 /*
973 * Copies a cursor image from user space to the proper place in driver
974 * memory so that the hardware can display the cursor image.
975 *
976 * Cursor data is represented as a sequence of 'width' bits packed into bytes.
977 * That is, the first 8 bits are in the first byte, the second 8 bits in the
978 * second byte, and so on. Therefore, the each row of the cursor is (width +
979 * 7) / 8 bytes of 'data'
980 *
981 * The DIU only supports cursors up to 32x32 (MAX_CURS). We reject cursors
982 * larger than this, so we already know that 'width' <= 32. Therefore, we can
983 * simplify our code by using a 32-bit big-endian integer ("line") to read in
984 * a single line of pixels, and only look at the top 'width' bits of that
985 * integer.
986 *
987 * This could result in an unaligned 32-bit read. For example, if the cursor
988 * is 24x24, then the first three bytes of 'image' contain the pixel data for
989 * the top line of the cursor. We do a 32-bit read of 'image', but we look
990 * only at the top 24 bits. Then we increment 'image' by 3 bytes. The next
991 * read is unaligned. The only problem is that we might read past the end of
992 * 'image' by 1-3 bytes, but that should not cause any problems.
993 */
994 static void fsl_diu_load_cursor_image(struct fb_info *info,
995 const void *image, uint16_t bg, uint16_t fg,
996 unsigned int width, unsigned int height)
997 {
998 struct mfb_info *mfbi = info->par;
999 struct fsl_diu_data *data = mfbi->parent;
1000 __le16 *cursor = data->cursor;
1001 __le16 _fg = cpu_to_le16(fg);
1002 __le16 _bg = cpu_to_le16(bg);
1003 unsigned int h, w;
1004
1005 for (h = 0; h < height; h++) {
1006 uint32_t mask = 1 << 31;
1007 uint32_t line = be32_to_cpup(image);
1008
1009 for (w = 0; w < width; w++) {
1010 cursor[w] = (line & mask) ? _fg : _bg;
1011 mask >>= 1;
1012 }
1013
1014 cursor += MAX_CURS;
1015 image += DIV_ROUND_UP(width, 8);
1016 }
1017 }
1018
1019 /*
1020 * Set a hardware cursor. The image data for the cursor is passed via the
1021 * fb_cursor object.
1022 */
1023 static int fsl_diu_cursor(struct fb_info *info, struct fb_cursor *cursor)
1024 {
1025 struct mfb_info *mfbi = info->par;
1026 struct fsl_diu_data *data = mfbi->parent;
1027 struct diu __iomem *hw = data->diu_reg;
1028
1029 if (cursor->image.width > MAX_CURS || cursor->image.height > MAX_CURS)
1030 return -EINVAL;
1031
1032 /* The cursor size has changed */
1033 if (cursor->set & FB_CUR_SETSIZE) {
1034 /*
1035 * The DIU cursor is a fixed size, so when we get this
1036 * message, instead of resizing the cursor, we just clear
1037 * all the image data, in expectation of new data. However,
1038 * in tests this control does not appear to be normally
1039 * called.
1040 */
1041 memset(data->cursor, 0, sizeof(data->cursor));
1042 }
1043
1044 /* The cursor position has changed (cursor->image.dx|dy) */
1045 if (cursor->set & FB_CUR_SETPOS) {
1046 uint32_t xx, yy;
1047
1048 yy = (cursor->image.dy - info->var.yoffset) & 0x7ff;
1049 xx = (cursor->image.dx - info->var.xoffset) & 0x7ff;
1050
1051 out_be32(&hw->curs_pos, yy << 16 | xx);
1052 }
1053
1054 /*
1055 * FB_CUR_SETIMAGE - the cursor image has changed
1056 * FB_CUR_SETCMAP - the cursor colors has changed
1057 * FB_CUR_SETSHAPE - the cursor bitmask has changed
1058 */
1059 if (cursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETCMAP | FB_CUR_SETIMAGE)) {
1060 unsigned int image_size =
1061 DIV_ROUND_UP(cursor->image.width, 8) * cursor->image.height;
1062 unsigned int image_words =
1063 DIV_ROUND_UP(image_size, sizeof(uint32_t));
1064 unsigned int bg_idx = cursor->image.bg_color;
1065 unsigned int fg_idx = cursor->image.fg_color;
1066 uint8_t buffer[image_size];
1067 uint32_t *image, *source, *mask;
1068 uint16_t fg, bg;
1069 unsigned int i;
1070
1071 if (info->state != FBINFO_STATE_RUNNING)
1072 return 0;
1073
1074 /*
1075 * Determine the size of the cursor image data. Normally,
1076 * it's 8x16.
1077 */
1078 image_size = DIV_ROUND_UP(cursor->image.width, 8) *
1079 cursor->image.height;
1080
1081 bg = ((info->cmap.red[bg_idx] & 0xf8) << 7) |
1082 ((info->cmap.green[bg_idx] & 0xf8) << 2) |
1083 ((info->cmap.blue[bg_idx] & 0xf8) >> 3) |
1084 1 << 15;
1085
1086 fg = ((info->cmap.red[fg_idx] & 0xf8) << 7) |
1087 ((info->cmap.green[fg_idx] & 0xf8) << 2) |
1088 ((info->cmap.blue[fg_idx] & 0xf8) >> 3) |
1089 1 << 15;
1090
1091 /* Use 32-bit operations on the data to improve performance */
1092 image = (uint32_t *)buffer;
1093 source = (uint32_t *)cursor->image.data;
1094 mask = (uint32_t *)cursor->mask;
1095
1096 if (cursor->rop == ROP_XOR)
1097 for (i = 0; i < image_words; i++)
1098 image[i] = source[i] ^ mask[i];
1099 else
1100 for (i = 0; i < image_words; i++)
1101 image[i] = source[i] & mask[i];
1102
1103 fsl_diu_load_cursor_image(info, image, bg, fg,
1104 cursor->image.width, cursor->image.height);
1105 };
1106
1107 /*
1108 * Show or hide the cursor. The cursor data is always stored in the
1109 * 'cursor' memory block, and the actual cursor position is always in
1110 * the DIU's CURS_POS register. To hide the cursor, we redirect the
1111 * CURSOR register to a blank cursor. The show the cursor, we
1112 * redirect the CURSOR register to the real cursor data.
1113 */
1114 if (cursor->enable)
1115 out_be32(&hw->cursor, DMA_ADDR(data, cursor));
1116 else
1117 out_be32(&hw->cursor, DMA_ADDR(data, blank_cursor));
1118
1119 return 0;
1120 }
1121
1122 /*
1123 * Using the fb_var_screeninfo in fb_info we set the resolution of this
1124 * particular framebuffer. This function alters the fb_fix_screeninfo stored
1125 * in fb_info. It does not alter var in fb_info since we are using that
1126 * data. This means we depend on the data in var inside fb_info to be
1127 * supported by the hardware. fsl_diu_check_var is always called before
1128 * fsl_diu_set_par to ensure this.
1129 */
1130 static int fsl_diu_set_par(struct fb_info *info)
1131 {
1132 unsigned long len;
1133 struct fb_var_screeninfo *var = &info->var;
1134 struct mfb_info *mfbi = info->par;
1135 struct fsl_diu_data *data = mfbi->parent;
1136 struct diu_ad *ad = mfbi->ad;
1137 struct diu __iomem *hw;
1138
1139 hw = data->diu_reg;
1140
1141 set_fix(info);
1142
1143 len = info->var.yres_virtual * info->fix.line_length;
1144 /* Alloc & dealloc each time resolution/bpp change */
1145 if (len != info->fix.smem_len) {
1146 if (info->fix.smem_start)
1147 unmap_video_memory(info);
1148
1149 /* Memory allocation for framebuffer */
1150 if (map_video_memory(info)) {
1151 dev_err(info->dev, "unable to allocate fb memory 1\n");
1152 return -ENOMEM;
1153 }
1154 }
1155
1156 if (diu_ops.get_pixel_format)
1157 ad->pix_fmt = diu_ops.get_pixel_format(data->monitor_port,
1158 var->bits_per_pixel);
1159 else
1160 ad->pix_fmt = fsl_diu_get_pixel_format(var->bits_per_pixel);
1161
1162 ad->addr = cpu_to_le32(info->fix.smem_start);
1163 ad->src_size_g_alpha = cpu_to_le32((var->yres_virtual << 12) |
1164 var->xres_virtual) | mfbi->g_alpha;
1165 /* AOI should not be greater than display size */
1166 ad->aoi_size = cpu_to_le32((var->yres << 16) | var->xres);
1167 ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
1168 ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
1169
1170 /* Disable chroma keying function */
1171 ad->ckmax_r = 0;
1172 ad->ckmax_g = 0;
1173 ad->ckmax_b = 0;
1174
1175 ad->ckmin_r = 255;
1176 ad->ckmin_g = 255;
1177 ad->ckmin_b = 255;
1178
1179 if (mfbi->index == PLANE0)
1180 update_lcdc(info);
1181 return 0;
1182 }
1183
1184 static inline __u32 CNVT_TOHW(__u32 val, __u32 width)
1185 {
1186 return ((val << width) + 0x7FFF - val) >> 16;
1187 }
1188
1189 /*
1190 * Set a single color register. The values supplied have a 16 bit magnitude
1191 * which needs to be scaled in this function for the hardware. Things to take
1192 * into consideration are how many color registers, if any, are supported with
1193 * the current color visual. With truecolor mode no color palettes are
1194 * supported. Here a pseudo palette is created which we store the value in
1195 * pseudo_palette in struct fb_info. For pseudocolor mode we have a limited
1196 * color palette.
1197 */
1198 static int fsl_diu_setcolreg(unsigned int regno, unsigned int red,
1199 unsigned int green, unsigned int blue,
1200 unsigned int transp, struct fb_info *info)
1201 {
1202 int ret = 1;
1203
1204 /*
1205 * If greyscale is true, then we convert the RGB value
1206 * to greyscale no matter what visual we are using.
1207 */
1208 if (info->var.grayscale)
1209 red = green = blue = (19595 * red + 38470 * green +
1210 7471 * blue) >> 16;
1211 switch (info->fix.visual) {
1212 case FB_VISUAL_TRUECOLOR:
1213 /*
1214 * 16-bit True Colour. We encode the RGB value
1215 * according to the RGB bitfield information.
1216 */
1217 if (regno < 16) {
1218 u32 *pal = info->pseudo_palette;
1219 u32 v;
1220
1221 red = CNVT_TOHW(red, info->var.red.length);
1222 green = CNVT_TOHW(green, info->var.green.length);
1223 blue = CNVT_TOHW(blue, info->var.blue.length);
1224 transp = CNVT_TOHW(transp, info->var.transp.length);
1225
1226 v = (red << info->var.red.offset) |
1227 (green << info->var.green.offset) |
1228 (blue << info->var.blue.offset) |
1229 (transp << info->var.transp.offset);
1230
1231 pal[regno] = v;
1232 ret = 0;
1233 }
1234 break;
1235 }
1236
1237 return ret;
1238 }
1239
1240 /*
1241 * Pan (or wrap, depending on the `vmode' field) the display using the
1242 * 'xoffset' and 'yoffset' fields of the 'var' structure. If the values
1243 * don't fit, return -EINVAL.
1244 */
1245 static int fsl_diu_pan_display(struct fb_var_screeninfo *var,
1246 struct fb_info *info)
1247 {
1248 if ((info->var.xoffset == var->xoffset) &&
1249 (info->var.yoffset == var->yoffset))
1250 return 0; /* No change, do nothing */
1251
1252 if (var->xoffset < 0 || var->yoffset < 0
1253 || var->xoffset + info->var.xres > info->var.xres_virtual
1254 || var->yoffset + info->var.yres > info->var.yres_virtual)
1255 return -EINVAL;
1256
1257 info->var.xoffset = var->xoffset;
1258 info->var.yoffset = var->yoffset;
1259
1260 if (var->vmode & FB_VMODE_YWRAP)
1261 info->var.vmode |= FB_VMODE_YWRAP;
1262 else
1263 info->var.vmode &= ~FB_VMODE_YWRAP;
1264
1265 fsl_diu_set_aoi(info);
1266
1267 return 0;
1268 }
1269
1270 static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
1271 unsigned long arg)
1272 {
1273 struct mfb_info *mfbi = info->par;
1274 struct diu_ad *ad = mfbi->ad;
1275 struct mfb_chroma_key ck;
1276 unsigned char global_alpha;
1277 struct aoi_display_offset aoi_d;
1278 __u32 pix_fmt;
1279 void __user *buf = (void __user *)arg;
1280
1281 if (!arg)
1282 return -EINVAL;
1283
1284 dev_dbg(info->dev, "ioctl %08x (dir=%s%s type=%u nr=%u size=%u)\n", cmd,
1285 _IOC_DIR(cmd) & _IOC_READ ? "R" : "",
1286 _IOC_DIR(cmd) & _IOC_WRITE ? "W" : "",
1287 _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
1288
1289 switch (cmd) {
1290 case MFB_SET_PIXFMT_OLD:
1291 dev_warn(info->dev,
1292 "MFB_SET_PIXFMT value of 0x%08x is deprecated.\n",
1293 MFB_SET_PIXFMT_OLD);
1294 case MFB_SET_PIXFMT:
1295 if (copy_from_user(&pix_fmt, buf, sizeof(pix_fmt)))
1296 return -EFAULT;
1297 ad->pix_fmt = pix_fmt;
1298 break;
1299 case MFB_GET_PIXFMT_OLD:
1300 dev_warn(info->dev,
1301 "MFB_GET_PIXFMT value of 0x%08x is deprecated.\n",
1302 MFB_GET_PIXFMT_OLD);
1303 case MFB_GET_PIXFMT:
1304 pix_fmt = ad->pix_fmt;
1305 if (copy_to_user(buf, &pix_fmt, sizeof(pix_fmt)))
1306 return -EFAULT;
1307 break;
1308 case MFB_SET_AOID:
1309 if (copy_from_user(&aoi_d, buf, sizeof(aoi_d)))
1310 return -EFAULT;
1311 mfbi->x_aoi_d = aoi_d.x_aoi_d;
1312 mfbi->y_aoi_d = aoi_d.y_aoi_d;
1313 fsl_diu_check_var(&info->var, info);
1314 fsl_diu_set_aoi(info);
1315 break;
1316 case MFB_GET_AOID:
1317 aoi_d.x_aoi_d = mfbi->x_aoi_d;
1318 aoi_d.y_aoi_d = mfbi->y_aoi_d;
1319 if (copy_to_user(buf, &aoi_d, sizeof(aoi_d)))
1320 return -EFAULT;
1321 break;
1322 case MFB_GET_ALPHA:
1323 global_alpha = mfbi->g_alpha;
1324 if (copy_to_user(buf, &global_alpha, sizeof(global_alpha)))
1325 return -EFAULT;
1326 break;
1327 case MFB_SET_ALPHA:
1328 /* set panel information */
1329 if (copy_from_user(&global_alpha, buf, sizeof(global_alpha)))
1330 return -EFAULT;
1331 ad->src_size_g_alpha = (ad->src_size_g_alpha & (~0xff)) |
1332 (global_alpha & 0xff);
1333 mfbi->g_alpha = global_alpha;
1334 break;
1335 case MFB_SET_CHROMA_KEY:
1336 /* set panel winformation */
1337 if (copy_from_user(&ck, buf, sizeof(ck)))
1338 return -EFAULT;
1339
1340 if (ck.enable &&
1341 (ck.red_max < ck.red_min ||
1342 ck.green_max < ck.green_min ||
1343 ck.blue_max < ck.blue_min))
1344 return -EINVAL;
1345
1346 if (!ck.enable) {
1347 ad->ckmax_r = 0;
1348 ad->ckmax_g = 0;
1349 ad->ckmax_b = 0;
1350 ad->ckmin_r = 255;
1351 ad->ckmin_g = 255;
1352 ad->ckmin_b = 255;
1353 } else {
1354 ad->ckmax_r = ck.red_max;
1355 ad->ckmax_g = ck.green_max;
1356 ad->ckmax_b = ck.blue_max;
1357 ad->ckmin_r = ck.red_min;
1358 ad->ckmin_g = ck.green_min;
1359 ad->ckmin_b = ck.blue_min;
1360 }
1361 break;
1362 #ifdef CONFIG_PPC_MPC512x
1363 case MFB_SET_GAMMA: {
1364 struct fsl_diu_data *data = mfbi->parent;
1365
1366 if (copy_from_user(data->gamma, buf, sizeof(data->gamma)))
1367 return -EFAULT;
1368 setbits32(&data->diu_reg->gamma, 0); /* Force table reload */
1369 break;
1370 }
1371 case MFB_GET_GAMMA: {
1372 struct fsl_diu_data *data = mfbi->parent;
1373
1374 if (copy_to_user(buf, data->gamma, sizeof(data->gamma)))
1375 return -EFAULT;
1376 break;
1377 }
1378 #endif
1379 default:
1380 dev_err(info->dev, "unknown ioctl command (0x%08X)\n", cmd);
1381 return -ENOIOCTLCMD;
1382 }
1383
1384 return 0;
1385 }
1386
1387 static inline void fsl_diu_enable_interrupts(struct fsl_diu_data *data)
1388 {
1389 u32 int_mask = INT_UNDRUN; /* enable underrun detection */
1390
1391 if (IS_ENABLED(CONFIG_NOT_COHERENT_CACHE))
1392 int_mask |= INT_VSYNC; /* enable vertical sync */
1393
1394 clrbits32(&data->diu_reg->int_mask, int_mask);
1395 }
1396
1397 /* turn on fb if count == 1
1398 */
1399 static int fsl_diu_open(struct fb_info *info, int user)
1400 {
1401 struct mfb_info *mfbi = info->par;
1402 int res = 0;
1403
1404 /* free boot splash memory on first /dev/fb0 open */
1405 if ((mfbi->index == PLANE0) && diu_ops.release_bootmem)
1406 diu_ops.release_bootmem();
1407
1408 spin_lock(&diu_lock);
1409 mfbi->count++;
1410 if (mfbi->count == 1) {
1411 fsl_diu_check_var(&info->var, info);
1412 res = fsl_diu_set_par(info);
1413 if (res < 0)
1414 mfbi->count--;
1415 else {
1416 fsl_diu_enable_interrupts(mfbi->parent);
1417 fsl_diu_enable_panel(info);
1418 }
1419 }
1420
1421 spin_unlock(&diu_lock);
1422 return res;
1423 }
1424
1425 /* turn off fb if count == 0
1426 */
1427 static int fsl_diu_release(struct fb_info *info, int user)
1428 {
1429 struct mfb_info *mfbi = info->par;
1430 int res = 0;
1431
1432 spin_lock(&diu_lock);
1433 mfbi->count--;
1434 if (mfbi->count == 0) {
1435 struct fsl_diu_data *data = mfbi->parent;
1436 bool disable = true;
1437 int i;
1438
1439 /* Disable interrupts only if all AOIs are closed */
1440 for (i = 0; i < NUM_AOIS; i++) {
1441 struct mfb_info *mi = data->fsl_diu_info[i].par;
1442
1443 if (mi->count)
1444 disable = false;
1445 }
1446 if (disable)
1447 out_be32(&data->diu_reg->int_mask, 0xffffffff);
1448 fsl_diu_disable_panel(info);
1449 }
1450
1451 spin_unlock(&diu_lock);
1452 return res;
1453 }
1454
1455 static struct fb_ops fsl_diu_ops = {
1456 .owner = THIS_MODULE,
1457 .fb_check_var = fsl_diu_check_var,
1458 .fb_set_par = fsl_diu_set_par,
1459 .fb_setcolreg = fsl_diu_setcolreg,
1460 .fb_pan_display = fsl_diu_pan_display,
1461 .fb_fillrect = cfb_fillrect,
1462 .fb_copyarea = cfb_copyarea,
1463 .fb_imageblit = cfb_imageblit,
1464 .fb_ioctl = fsl_diu_ioctl,
1465 .fb_open = fsl_diu_open,
1466 .fb_release = fsl_diu_release,
1467 .fb_cursor = fsl_diu_cursor,
1468 };
1469
1470 static int install_fb(struct fb_info *info)
1471 {
1472 int rc;
1473 struct mfb_info *mfbi = info->par;
1474 struct fsl_diu_data *data = mfbi->parent;
1475 const char *aoi_mode, *init_aoi_mode = "320x240";
1476 struct fb_videomode *db = fsl_diu_mode_db;
1477 unsigned int dbsize = ARRAY_SIZE(fsl_diu_mode_db);
1478 int has_default_mode = 1;
1479
1480 info->var.activate = FB_ACTIVATE_NOW;
1481 info->fbops = &fsl_diu_ops;
1482 info->flags = FBINFO_DEFAULT | FBINFO_VIRTFB | FBINFO_PARTIAL_PAN_OK |
1483 FBINFO_READS_FAST;
1484 info->pseudo_palette = mfbi->pseudo_palette;
1485
1486 rc = fb_alloc_cmap(&info->cmap, 16, 0);
1487 if (rc)
1488 return rc;
1489
1490 if (mfbi->index == PLANE0) {
1491 if (data->has_edid) {
1492 /* Now build modedb from EDID */
1493 fb_edid_to_monspecs(data->edid_data, &info->monspecs);
1494 fb_videomode_to_modelist(info->monspecs.modedb,
1495 info->monspecs.modedb_len,
1496 &info->modelist);
1497 db = info->monspecs.modedb;
1498 dbsize = info->monspecs.modedb_len;
1499 }
1500 aoi_mode = fb_mode;
1501 } else {
1502 aoi_mode = init_aoi_mode;
1503 }
1504 rc = fb_find_mode(&info->var, info, aoi_mode, db, dbsize, NULL,
1505 default_bpp);
1506 if (!rc) {
1507 /*
1508 * For plane 0 we continue and look into
1509 * driver's internal modedb.
1510 */
1511 if ((mfbi->index == PLANE0) && data->has_edid)
1512 has_default_mode = 0;
1513 else
1514 return -EINVAL;
1515 }
1516
1517 if (!has_default_mode) {
1518 rc = fb_find_mode(&info->var, info, aoi_mode, fsl_diu_mode_db,
1519 ARRAY_SIZE(fsl_diu_mode_db), NULL, default_bpp);
1520 if (rc)
1521 has_default_mode = 1;
1522 }
1523
1524 /* Still not found, use preferred mode from database if any */
1525 if (!has_default_mode && info->monspecs.modedb) {
1526 struct fb_monspecs *specs = &info->monspecs;
1527 struct fb_videomode *modedb = &specs->modedb[0];
1528
1529 /*
1530 * Get preferred timing. If not found,
1531 * first mode in database will be used.
1532 */
1533 if (specs->misc & FB_MISC_1ST_DETAIL) {
1534 int i;
1535
1536 for (i = 0; i < specs->modedb_len; i++) {
1537 if (specs->modedb[i].flag & FB_MODE_IS_FIRST) {
1538 modedb = &specs->modedb[i];
1539 break;
1540 }
1541 }
1542 }
1543
1544 info->var.bits_per_pixel = default_bpp;
1545 fb_videomode_to_var(&info->var, modedb);
1546 }
1547
1548 if (fsl_diu_check_var(&info->var, info)) {
1549 dev_err(info->dev, "fsl_diu_check_var failed\n");
1550 unmap_video_memory(info);
1551 fb_dealloc_cmap(&info->cmap);
1552 return -EINVAL;
1553 }
1554
1555 if (register_framebuffer(info) < 0) {
1556 dev_err(info->dev, "register_framebuffer failed\n");
1557 unmap_video_memory(info);
1558 fb_dealloc_cmap(&info->cmap);
1559 return -EINVAL;
1560 }
1561
1562 mfbi->registered = 1;
1563 dev_info(info->dev, "%s registered successfully\n", mfbi->id);
1564
1565 return 0;
1566 }
1567
1568 static void uninstall_fb(struct fb_info *info)
1569 {
1570 struct mfb_info *mfbi = info->par;
1571
1572 if (!mfbi->registered)
1573 return;
1574
1575 unregister_framebuffer(info);
1576 unmap_video_memory(info);
1577 if (&info->cmap)
1578 fb_dealloc_cmap(&info->cmap);
1579
1580 mfbi->registered = 0;
1581 }
1582
1583 static irqreturn_t fsl_diu_isr(int irq, void *dev_id)
1584 {
1585 struct diu __iomem *hw = dev_id;
1586 uint32_t status = in_be32(&hw->int_status);
1587
1588 if (status) {
1589 /* This is the workaround for underrun */
1590 if (status & INT_UNDRUN) {
1591 out_be32(&hw->diu_mode, 0);
1592 udelay(1);
1593 out_be32(&hw->diu_mode, 1);
1594 }
1595 #if defined(CONFIG_NOT_COHERENT_CACHE)
1596 else if (status & INT_VSYNC) {
1597 unsigned int i;
1598
1599 for (i = 0; i < coherence_data_size;
1600 i += d_cache_line_size)
1601 __asm__ __volatile__ (
1602 "dcbz 0, %[input]"
1603 ::[input]"r"(&coherence_data[i]));
1604 }
1605 #endif
1606 return IRQ_HANDLED;
1607 }
1608 return IRQ_NONE;
1609 }
1610
1611 #ifdef CONFIG_PM
1612 /*
1613 * Power management hooks. Note that we won't be called from IRQ context,
1614 * unlike the blank functions above, so we may sleep.
1615 */
1616 static int fsl_diu_suspend(struct platform_device *ofdev, pm_message_t state)
1617 {
1618 struct fsl_diu_data *data;
1619
1620 data = dev_get_drvdata(&ofdev->dev);
1621 disable_lcdc(data->fsl_diu_info);
1622
1623 return 0;
1624 }
1625
1626 static int fsl_diu_resume(struct platform_device *ofdev)
1627 {
1628 struct fsl_diu_data *data;
1629
1630 data = dev_get_drvdata(&ofdev->dev);
1631 enable_lcdc(data->fsl_diu_info);
1632
1633 return 0;
1634 }
1635
1636 #else
1637 #define fsl_diu_suspend NULL
1638 #define fsl_diu_resume NULL
1639 #endif /* CONFIG_PM */
1640
1641 static ssize_t store_monitor(struct device *device,
1642 struct device_attribute *attr, const char *buf, size_t count)
1643 {
1644 enum fsl_diu_monitor_port old_monitor_port;
1645 struct fsl_diu_data *data =
1646 container_of(attr, struct fsl_diu_data, dev_attr);
1647
1648 old_monitor_port = data->monitor_port;
1649 data->monitor_port = fsl_diu_name_to_port(buf);
1650
1651 if (old_monitor_port != data->monitor_port) {
1652 /* All AOIs need adjust pixel format
1653 * fsl_diu_set_par only change the pixsel format here
1654 * unlikely to fail. */
1655 unsigned int i;
1656
1657 for (i=0; i < NUM_AOIS; i++)
1658 fsl_diu_set_par(&data->fsl_diu_info[i]);
1659 }
1660 return count;
1661 }
1662
1663 static ssize_t show_monitor(struct device *device,
1664 struct device_attribute *attr, char *buf)
1665 {
1666 struct fsl_diu_data *data =
1667 container_of(attr, struct fsl_diu_data, dev_attr);
1668
1669 switch (data->monitor_port) {
1670 case FSL_DIU_PORT_DVI:
1671 return sprintf(buf, "DVI\n");
1672 case FSL_DIU_PORT_LVDS:
1673 return sprintf(buf, "Single-link LVDS\n");
1674 case FSL_DIU_PORT_DLVDS:
1675 return sprintf(buf, "Dual-link LVDS\n");
1676 }
1677
1678 return 0;
1679 }
1680
1681 static int fsl_diu_probe(struct platform_device *pdev)
1682 {
1683 struct device_node *np = pdev->dev.of_node;
1684 struct mfb_info *mfbi;
1685 struct fsl_diu_data *data;
1686 dma_addr_t dma_addr; /* DMA addr of fsl_diu_data struct */
1687 const void *prop;
1688 unsigned int i;
1689 int ret;
1690
1691 data = dmam_alloc_coherent(&pdev->dev, sizeof(struct fsl_diu_data),
1692 &dma_addr, GFP_DMA | __GFP_ZERO);
1693 if (!data)
1694 return -ENOMEM;
1695 data->dma_addr = dma_addr;
1696
1697 /*
1698 * dma_alloc_coherent() uses a page allocator, so the address is
1699 * always page-aligned. We need the memory to be 32-byte aligned,
1700 * so that's good. However, if one day the allocator changes, we
1701 * need to catch that. It's not worth the effort to handle unaligned
1702 * alloctions now because it's highly unlikely to ever be a problem.
1703 */
1704 if ((unsigned long)data & 31) {
1705 dev_err(&pdev->dev, "misaligned allocation");
1706 ret = -ENOMEM;
1707 goto error;
1708 }
1709
1710 spin_lock_init(&data->reg_lock);
1711
1712 for (i = 0; i < NUM_AOIS; i++) {
1713 struct fb_info *info = &data->fsl_diu_info[i];
1714
1715 info->device = &pdev->dev;
1716 info->par = &data->mfb[i];
1717
1718 /*
1719 * We store the physical address of the AD in the reserved
1720 * 'paddr' field of the AD itself.
1721 */
1722 data->ad[i].paddr = DMA_ADDR(data, ad[i]);
1723
1724 info->fix.smem_start = 0;
1725
1726 /* Initialize the AOI data structure */
1727 mfbi = info->par;
1728 memcpy(mfbi, &mfb_template[i], sizeof(struct mfb_info));
1729 mfbi->parent = data;
1730 mfbi->ad = &data->ad[i];
1731 }
1732
1733 /* Get the EDID data from the device tree, if present */
1734 prop = of_get_property(np, "edid", &ret);
1735 if (prop && ret == EDID_LENGTH) {
1736 memcpy(data->edid_data, prop, EDID_LENGTH);
1737 data->has_edid = true;
1738 }
1739
1740 data->diu_reg = of_iomap(np, 0);
1741 if (!data->diu_reg) {
1742 dev_err(&pdev->dev, "cannot map DIU registers\n");
1743 ret = -EFAULT;
1744 goto error;
1745 }
1746
1747 /* Get the IRQ of the DIU */
1748 data->irq = irq_of_parse_and_map(np, 0);
1749
1750 if (!data->irq) {
1751 dev_err(&pdev->dev, "could not get DIU IRQ\n");
1752 ret = -EINVAL;
1753 goto error;
1754 }
1755 data->monitor_port = monitor_port;
1756
1757 /* Initialize the dummy Area Descriptor */
1758 data->dummy_ad.addr = cpu_to_le32(DMA_ADDR(data, dummy_aoi));
1759 data->dummy_ad.pix_fmt = 0x88882317;
1760 data->dummy_ad.src_size_g_alpha = cpu_to_le32((4 << 12) | 4);
1761 data->dummy_ad.aoi_size = cpu_to_le32((4 << 16) | 2);
1762 data->dummy_ad.offset_xyi = 0;
1763 data->dummy_ad.offset_xyd = 0;
1764 data->dummy_ad.next_ad = 0;
1765 data->dummy_ad.paddr = DMA_ADDR(data, dummy_ad);
1766
1767 /*
1768 * Let DIU continue to display splash screen if it was pre-initialized
1769 * by the bootloader; otherwise, clear the display.
1770 */
1771 if (in_be32(&data->diu_reg->diu_mode) == MFB_MODE0)
1772 out_be32(&data->diu_reg->desc[0], 0);
1773
1774 out_be32(&data->diu_reg->desc[1], data->dummy_ad.paddr);
1775 out_be32(&data->diu_reg->desc[2], data->dummy_ad.paddr);
1776
1777 /*
1778 * Older versions of U-Boot leave interrupts enabled, so disable
1779 * all of them and clear the status register.
1780 */
1781 out_be32(&data->diu_reg->int_mask, 0xffffffff);
1782 in_be32(&data->diu_reg->int_status);
1783
1784 ret = request_irq(data->irq, fsl_diu_isr, 0, "fsl-diu-fb",
1785 data->diu_reg);
1786 if (ret) {
1787 dev_err(&pdev->dev, "could not claim irq\n");
1788 goto error;
1789 }
1790
1791 for (i = 0; i < NUM_AOIS; i++) {
1792 ret = install_fb(&data->fsl_diu_info[i]);
1793 if (ret) {
1794 dev_err(&pdev->dev, "could not register fb %d\n", i);
1795 free_irq(data->irq, data->diu_reg);
1796 goto error;
1797 }
1798 }
1799
1800 sysfs_attr_init(&data->dev_attr.attr);
1801 data->dev_attr.attr.name = "monitor";
1802 data->dev_attr.attr.mode = S_IRUGO|S_IWUSR;
1803 data->dev_attr.show = show_monitor;
1804 data->dev_attr.store = store_monitor;
1805 ret = device_create_file(&pdev->dev, &data->dev_attr);
1806 if (ret) {
1807 dev_err(&pdev->dev, "could not create sysfs file %s\n",
1808 data->dev_attr.attr.name);
1809 }
1810
1811 dev_set_drvdata(&pdev->dev, data);
1812 return 0;
1813
1814 error:
1815 for (i = 0; i < NUM_AOIS; i++)
1816 uninstall_fb(&data->fsl_diu_info[i]);
1817
1818 iounmap(data->diu_reg);
1819
1820 return ret;
1821 }
1822
1823 static int fsl_diu_remove(struct platform_device *pdev)
1824 {
1825 struct fsl_diu_data *data;
1826 int i;
1827
1828 data = dev_get_drvdata(&pdev->dev);
1829 disable_lcdc(&data->fsl_diu_info[0]);
1830
1831 free_irq(data->irq, data->diu_reg);
1832
1833 for (i = 0; i < NUM_AOIS; i++)
1834 uninstall_fb(&data->fsl_diu_info[i]);
1835
1836 iounmap(data->diu_reg);
1837
1838 return 0;
1839 }
1840
1841 #ifndef MODULE
1842 static int __init fsl_diu_setup(char *options)
1843 {
1844 char *opt;
1845 unsigned long val;
1846
1847 if (!options || !*options)
1848 return 0;
1849
1850 while ((opt = strsep(&options, ",")) != NULL) {
1851 if (!*opt)
1852 continue;
1853 if (!strncmp(opt, "monitor=", 8)) {
1854 monitor_port = fsl_diu_name_to_port(opt + 8);
1855 } else if (!strncmp(opt, "bpp=", 4)) {
1856 if (!strict_strtoul(opt + 4, 10, &val))
1857 default_bpp = val;
1858 } else
1859 fb_mode = opt;
1860 }
1861
1862 return 0;
1863 }
1864 #endif
1865
1866 static struct of_device_id fsl_diu_match[] = {
1867 #ifdef CONFIG_PPC_MPC512x
1868 {
1869 .compatible = "fsl,mpc5121-diu",
1870 },
1871 #endif
1872 {
1873 .compatible = "fsl,diu",
1874 },
1875 {}
1876 };
1877 MODULE_DEVICE_TABLE(of, fsl_diu_match);
1878
1879 static struct platform_driver fsl_diu_driver = {
1880 .driver = {
1881 .name = "fsl-diu-fb",
1882 .owner = THIS_MODULE,
1883 .of_match_table = fsl_diu_match,
1884 },
1885 .probe = fsl_diu_probe,
1886 .remove = fsl_diu_remove,
1887 .suspend = fsl_diu_suspend,
1888 .resume = fsl_diu_resume,
1889 };
1890
1891 static int __init fsl_diu_init(void)
1892 {
1893 #ifdef CONFIG_NOT_COHERENT_CACHE
1894 struct device_node *np;
1895 const u32 *prop;
1896 #endif
1897 int ret;
1898 #ifndef MODULE
1899 char *option;
1900
1901 /*
1902 * For kernel boot options (in 'video=xxxfb:<options>' format)
1903 */
1904 if (fb_get_options("fslfb", &option))
1905 return -ENODEV;
1906 fsl_diu_setup(option);
1907 #else
1908 monitor_port = fsl_diu_name_to_port(monitor_string);
1909 #endif
1910 pr_info("Freescale Display Interface Unit (DIU) framebuffer driver\n");
1911
1912 #ifdef CONFIG_NOT_COHERENT_CACHE
1913 np = of_find_node_by_type(NULL, "cpu");
1914 if (!np) {
1915 pr_err("fsl-diu-fb: can't find 'cpu' device node\n");
1916 return -ENODEV;
1917 }
1918
1919 prop = of_get_property(np, "d-cache-size", NULL);
1920 if (prop == NULL) {
1921 pr_err("fsl-diu-fb: missing 'd-cache-size' property' "
1922 "in 'cpu' node\n");
1923 of_node_put(np);
1924 return -ENODEV;
1925 }
1926
1927 /*
1928 * Freescale PLRU requires 13/8 times the cache size to do a proper
1929 * displacement flush
1930 */
1931 coherence_data_size = be32_to_cpup(prop) * 13;
1932 coherence_data_size /= 8;
1933
1934 pr_debug("fsl-diu-fb: coherence data size is %zu bytes\n",
1935 coherence_data_size);
1936
1937 prop = of_get_property(np, "d-cache-line-size", NULL);
1938 if (prop == NULL) {
1939 pr_err("fsl-diu-fb: missing 'd-cache-line-size' property' "
1940 "in 'cpu' node\n");
1941 of_node_put(np);
1942 return -ENODEV;
1943 }
1944 d_cache_line_size = be32_to_cpup(prop);
1945
1946 pr_debug("fsl-diu-fb: cache lines size is %u bytes\n",
1947 d_cache_line_size);
1948
1949 of_node_put(np);
1950 coherence_data = vmalloc(coherence_data_size);
1951 if (!coherence_data) {
1952 pr_err("fsl-diu-fb: could not allocate coherence data "
1953 "(size=%zu)\n", coherence_data_size);
1954 return -ENOMEM;
1955 }
1956
1957 #endif
1958
1959 ret = platform_driver_register(&fsl_diu_driver);
1960 if (ret) {
1961 pr_err("fsl-diu-fb: failed to register platform driver\n");
1962 #if defined(CONFIG_NOT_COHERENT_CACHE)
1963 vfree(coherence_data);
1964 #endif
1965 }
1966 return ret;
1967 }
1968
1969 static void __exit fsl_diu_exit(void)
1970 {
1971 platform_driver_unregister(&fsl_diu_driver);
1972 #if defined(CONFIG_NOT_COHERENT_CACHE)
1973 vfree(coherence_data);
1974 #endif
1975 }
1976
1977 module_init(fsl_diu_init);
1978 module_exit(fsl_diu_exit);
1979
1980 MODULE_AUTHOR("York Sun <yorksun@freescale.com>");
1981 MODULE_DESCRIPTION("Freescale DIU framebuffer driver");
1982 MODULE_LICENSE("GPL");
1983
1984 module_param_named(mode, fb_mode, charp, 0);
1985 MODULE_PARM_DESC(mode,
1986 "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
1987 module_param_named(bpp, default_bpp, ulong, 0);
1988 MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified in 'mode'");
1989 module_param_named(monitor, monitor_string, charp, 0);
1990 MODULE_PARM_DESC(monitor, "Specify the monitor port "
1991 "(\"dvi\", \"lvds\", or \"dlvds\") if supported by the platform");
1992
Linus' kernel tree