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linux/audit.h: move ptrace.h include to kernel header
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / video / fsl-diu-fb.c
blob19cfd7a925638f305c7e349490ade67cf6dd425c
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 u8 cursor[MAX_CURS * MAX_CURS * 2] __aligned(32);
379 uint8_t edid_data[EDID_LENGTH];
380 bool has_edid;
381 } __aligned(32);
382
383 /* Determine the DMA address of a member of the fsl_diu_data structure */
384 #define DMA_ADDR(p, f) ((p)->dma_addr + offsetof(struct fsl_diu_data, f))
385
386 static struct mfb_info mfb_template[] = {
387 {
388 .index = PLANE0,
389 .id = "Panel0",
390 .registered = 0,
391 .count = 0,
392 .x_aoi_d = 0,
393 .y_aoi_d = 0,
394 },
395 {
396 .index = PLANE1_AOI0,
397 .id = "Panel1 AOI0",
398 .registered = 0,
399 .g_alpha = 0xff,
400 .count = 0,
401 .x_aoi_d = 0,
402 .y_aoi_d = 0,
403 },
404 {
405 .index = PLANE1_AOI1,
406 .id = "Panel1 AOI1",
407 .registered = 0,
408 .g_alpha = 0xff,
409 .count = 0,
410 .x_aoi_d = 0,
411 .y_aoi_d = 480,
412 },
413 {
414 .index = PLANE2_AOI0,
415 .id = "Panel2 AOI0",
416 .registered = 0,
417 .g_alpha = 0xff,
418 .count = 0,
419 .x_aoi_d = 640,
420 .y_aoi_d = 0,
421 },
422 {
423 .index = PLANE2_AOI1,
424 .id = "Panel2 AOI1",
425 .registered = 0,
426 .g_alpha = 0xff,
427 .count = 0,
428 .x_aoi_d = 640,
429 .y_aoi_d = 480,
430 },
431 };
432
433 #ifdef DEBUG
434 static void __attribute__ ((unused)) fsl_diu_dump(struct diu __iomem *hw)
435 {
436 mb();
437 pr_debug("DIU: desc=%08x,%08x,%08x, gamma=%08x pallete=%08x "
438 "cursor=%08x curs_pos=%08x diu_mode=%08x bgnd=%08x "
439 "disp_size=%08x hsyn_para=%08x vsyn_para=%08x syn_pol=%08x "
440 "thresholds=%08x int_mask=%08x plut=%08x\n",
441 hw->desc[0], hw->desc[1], hw->desc[2], hw->gamma,
442 hw->pallete, hw->cursor, hw->curs_pos, hw->diu_mode,
443 hw->bgnd, hw->disp_size, hw->hsyn_para, hw->vsyn_para,
444 hw->syn_pol, hw->thresholds, hw->int_mask, hw->plut);
445 rmb();
446 }
447 #endif
448
449 /**
450 * fsl_diu_name_to_port - convert a port name to a monitor port enum
451 *
452 * Takes the name of a monitor port ("dvi", "lvds", or "dlvds") and returns
453 * the enum fsl_diu_monitor_port that corresponds to that string.
454 *
455 * For compatibility with older versions, a number ("0", "1", or "2") is also
456 * supported.
457 *
458 * If the string is unknown, DVI is assumed.
459 *
460 * If the particular port is not supported by the platform, another port
461 * (platform-specific) is chosen instead.
462 */
463 static enum fsl_diu_monitor_port fsl_diu_name_to_port(const char *s)
464 {
465 enum fsl_diu_monitor_port port = FSL_DIU_PORT_DVI;
466 unsigned long val;
467
468 if (s) {
469 if (!strict_strtoul(s, 10, &val) && (val <= 2))
470 port = (enum fsl_diu_monitor_port) val;
471 else if (strncmp(s, "lvds", 4) == 0)
472 port = FSL_DIU_PORT_LVDS;
473 else if (strncmp(s, "dlvds", 5) == 0)
474 port = FSL_DIU_PORT_DLVDS;
475 }
476
477 return diu_ops.valid_monitor_port(port);
478 }
479
480 /*
481 * Workaround for failed writing desc register of planes.
482 * Needed with MPC5121 DIU rev 2.0 silicon.
483 */
484 void wr_reg_wa(u32 *reg, u32 val)
485 {
486 do {
487 out_be32(reg, val);
488 } while (in_be32(reg) != val);
489 }
490
491 static void fsl_diu_enable_panel(struct fb_info *info)
492 {
493 struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
494 struct diu_ad *ad = mfbi->ad;
495 struct fsl_diu_data *data = mfbi->parent;
496 struct diu __iomem *hw = data->diu_reg;
497
498 switch (mfbi->index) {
499 case PLANE0:
500 wr_reg_wa(&hw->desc[0], ad->paddr);
501 break;
502 case PLANE1_AOI0:
503 cmfbi = &data->mfb[2];
504 if (hw->desc[1] != ad->paddr) { /* AOI0 closed */
505 if (cmfbi->count > 0) /* AOI1 open */
506 ad->next_ad =
507 cpu_to_le32(cmfbi->ad->paddr);
508 else
509 ad->next_ad = 0;
510 wr_reg_wa(&hw->desc[1], ad->paddr);
511 }
512 break;
513 case PLANE2_AOI0:
514 cmfbi = &data->mfb[4];
515 if (hw->desc[2] != ad->paddr) { /* AOI0 closed */
516 if (cmfbi->count > 0) /* AOI1 open */
517 ad->next_ad =
518 cpu_to_le32(cmfbi->ad->paddr);
519 else
520 ad->next_ad = 0;
521 wr_reg_wa(&hw->desc[2], ad->paddr);
522 }
523 break;
524 case PLANE1_AOI1:
525 pmfbi = &data->mfb[1];
526 ad->next_ad = 0;
527 if (hw->desc[1] == data->dummy_ad.paddr)
528 wr_reg_wa(&hw->desc[1], ad->paddr);
529 else /* AOI0 open */
530 pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
531 break;
532 case PLANE2_AOI1:
533 pmfbi = &data->mfb[3];
534 ad->next_ad = 0;
535 if (hw->desc[2] == data->dummy_ad.paddr)
536 wr_reg_wa(&hw->desc[2], ad->paddr);
537 else /* AOI0 was open */
538 pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
539 break;
540 }
541 }
542
543 static void fsl_diu_disable_panel(struct fb_info *info)
544 {
545 struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
546 struct diu_ad *ad = mfbi->ad;
547 struct fsl_diu_data *data = mfbi->parent;
548 struct diu __iomem *hw = data->diu_reg;
549
550 switch (mfbi->index) {
551 case PLANE0:
552 wr_reg_wa(&hw->desc[0], 0);
553 break;
554 case PLANE1_AOI0:
555 cmfbi = &data->mfb[2];
556 if (cmfbi->count > 0) /* AOI1 is open */
557 wr_reg_wa(&hw->desc[1], cmfbi->ad->paddr);
558 /* move AOI1 to the first */
559 else /* AOI1 was closed */
560 wr_reg_wa(&hw->desc[1], data->dummy_ad.paddr);
561 /* close AOI 0 */
562 break;
563 case PLANE2_AOI0:
564 cmfbi = &data->mfb[4];
565 if (cmfbi->count > 0) /* AOI1 is open */
566 wr_reg_wa(&hw->desc[2], cmfbi->ad->paddr);
567 /* move AOI1 to the first */
568 else /* AOI1 was closed */
569 wr_reg_wa(&hw->desc[2], data->dummy_ad.paddr);
570 /* close AOI 0 */
571 break;
572 case PLANE1_AOI1:
573 pmfbi = &data->mfb[1];
574 if (hw->desc[1] != ad->paddr) {
575 /* AOI1 is not the first in the chain */
576 if (pmfbi->count > 0)
577 /* AOI0 is open, must be the first */
578 pmfbi->ad->next_ad = 0;
579 } else /* AOI1 is the first in the chain */
580 wr_reg_wa(&hw->desc[1], data->dummy_ad.paddr);
581 /* close AOI 1 */
582 break;
583 case PLANE2_AOI1:
584 pmfbi = &data->mfb[3];
585 if (hw->desc[2] != ad->paddr) {
586 /* AOI1 is not the first in the chain */
587 if (pmfbi->count > 0)
588 /* AOI0 is open, must be the first */
589 pmfbi->ad->next_ad = 0;
590 } else /* AOI1 is the first in the chain */
591 wr_reg_wa(&hw->desc[2], data->dummy_ad.paddr);
592 /* close AOI 1 */
593 break;
594 }
595 }
596
597 static void enable_lcdc(struct fb_info *info)
598 {
599 struct mfb_info *mfbi = info->par;
600 struct fsl_diu_data *data = mfbi->parent;
601 struct diu __iomem *hw = data->diu_reg;
602
603 out_be32(&hw->diu_mode, MFB_MODE1);
604 }
605
606 static void disable_lcdc(struct fb_info *info)
607 {
608 struct mfb_info *mfbi = info->par;
609 struct fsl_diu_data *data = mfbi->parent;
610 struct diu __iomem *hw = data->diu_reg;
611
612 out_be32(&hw->diu_mode, 0);
613 }
614
615 static void adjust_aoi_size_position(struct fb_var_screeninfo *var,
616 struct fb_info *info)
617 {
618 struct mfb_info *lower_aoi_mfbi, *upper_aoi_mfbi, *mfbi = info->par;
619 struct fsl_diu_data *data = mfbi->parent;
620 int available_height, upper_aoi_bottom;
621 enum mfb_index index = mfbi->index;
622 int lower_aoi_is_open, upper_aoi_is_open;
623 __u32 base_plane_width, base_plane_height, upper_aoi_height;
624
625 base_plane_width = data->fsl_diu_info[0].var.xres;
626 base_plane_height = data->fsl_diu_info[0].var.yres;
627
628 if (mfbi->x_aoi_d < 0)
629 mfbi->x_aoi_d = 0;
630 if (mfbi->y_aoi_d < 0)
631 mfbi->y_aoi_d = 0;
632 switch (index) {
633 case PLANE0:
634 if (mfbi->x_aoi_d != 0)
635 mfbi->x_aoi_d = 0;
636 if (mfbi->y_aoi_d != 0)
637 mfbi->y_aoi_d = 0;
638 break;
639 case PLANE1_AOI0:
640 case PLANE2_AOI0:
641 lower_aoi_mfbi = data->fsl_diu_info[index+1].par;
642 lower_aoi_is_open = lower_aoi_mfbi->count > 0 ? 1 : 0;
643 if (var->xres > base_plane_width)
644 var->xres = base_plane_width;
645 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
646 mfbi->x_aoi_d = base_plane_width - var->xres;
647
648 if (lower_aoi_is_open)
649 available_height = lower_aoi_mfbi->y_aoi_d;
650 else
651 available_height = base_plane_height;
652 if (var->yres > available_height)
653 var->yres = available_height;
654 if ((mfbi->y_aoi_d + var->yres) > available_height)
655 mfbi->y_aoi_d = available_height - var->yres;
656 break;
657 case PLANE1_AOI1:
658 case PLANE2_AOI1:
659 upper_aoi_mfbi = data->fsl_diu_info[index-1].par;
660 upper_aoi_height = data->fsl_diu_info[index-1].var.yres;
661 upper_aoi_bottom = upper_aoi_mfbi->y_aoi_d + upper_aoi_height;
662 upper_aoi_is_open = upper_aoi_mfbi->count > 0 ? 1 : 0;
663 if (var->xres > base_plane_width)
664 var->xres = base_plane_width;
665 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
666 mfbi->x_aoi_d = base_plane_width - var->xres;
667 if (mfbi->y_aoi_d < 0)
668 mfbi->y_aoi_d = 0;
669 if (upper_aoi_is_open) {
670 if (mfbi->y_aoi_d < upper_aoi_bottom)
671 mfbi->y_aoi_d = upper_aoi_bottom;
672 available_height = base_plane_height
673 - upper_aoi_bottom;
674 } else
675 available_height = base_plane_height;
676 if (var->yres > available_height)
677 var->yres = available_height;
678 if ((mfbi->y_aoi_d + var->yres) > base_plane_height)
679 mfbi->y_aoi_d = base_plane_height - var->yres;
680 break;
681 }
682 }
683 /*
684 * Checks to see if the hardware supports the state requested by var passed
685 * in. This function does not alter the hardware state! If the var passed in
686 * is slightly off by what the hardware can support then we alter the var
687 * PASSED in to what we can do. If the hardware doesn't support mode change
688 * a -EINVAL will be returned by the upper layers.
689 */
690 static int fsl_diu_check_var(struct fb_var_screeninfo *var,
691 struct fb_info *info)
692 {
693 if (var->xres_virtual < var->xres)
694 var->xres_virtual = var->xres;
695 if (var->yres_virtual < var->yres)
696 var->yres_virtual = var->yres;
697
698 if (var->xoffset < 0)
699 var->xoffset = 0;
700
701 if (var->yoffset < 0)
702 var->yoffset = 0;
703
704 if (var->xoffset + info->var.xres > info->var.xres_virtual)
705 var->xoffset = info->var.xres_virtual - info->var.xres;
706
707 if (var->yoffset + info->var.yres > info->var.yres_virtual)
708 var->yoffset = info->var.yres_virtual - info->var.yres;
709
710 if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
711 (var->bits_per_pixel != 16))
712 var->bits_per_pixel = default_bpp;
713
714 switch (var->bits_per_pixel) {
715 case 16:
716 var->red.length = 5;
717 var->red.offset = 11;
718 var->red.msb_right = 0;
719
720 var->green.length = 6;
721 var->green.offset = 5;
722 var->green.msb_right = 0;
723
724 var->blue.length = 5;
725 var->blue.offset = 0;
726 var->blue.msb_right = 0;
727
728 var->transp.length = 0;
729 var->transp.offset = 0;
730 var->transp.msb_right = 0;
731 break;
732 case 24:
733 var->red.length = 8;
734 var->red.offset = 0;
735 var->red.msb_right = 0;
736
737 var->green.length = 8;
738 var->green.offset = 8;
739 var->green.msb_right = 0;
740
741 var->blue.length = 8;
742 var->blue.offset = 16;
743 var->blue.msb_right = 0;
744
745 var->transp.length = 0;
746 var->transp.offset = 0;
747 var->transp.msb_right = 0;
748 break;
749 case 32:
750 var->red.length = 8;
751 var->red.offset = 16;
752 var->red.msb_right = 0;
753
754 var->green.length = 8;
755 var->green.offset = 8;
756 var->green.msb_right = 0;
757
758 var->blue.length = 8;
759 var->blue.offset = 0;
760 var->blue.msb_right = 0;
761
762 var->transp.length = 8;
763 var->transp.offset = 24;
764 var->transp.msb_right = 0;
765
766 break;
767 }
768
769 var->height = -1;
770 var->width = -1;
771 var->grayscale = 0;
772
773 /* Copy nonstd field to/from sync for fbset usage */
774 var->sync |= var->nonstd;
775 var->nonstd |= var->sync;
776
777 adjust_aoi_size_position(var, info);
778 return 0;
779 }
780
781 static void set_fix(struct fb_info *info)
782 {
783 struct fb_fix_screeninfo *fix = &info->fix;
784 struct fb_var_screeninfo *var = &info->var;
785 struct mfb_info *mfbi = info->par;
786
787 strncpy(fix->id, mfbi->id, sizeof(fix->id));
788 fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
789 fix->type = FB_TYPE_PACKED_PIXELS;
790 fix->accel = FB_ACCEL_NONE;
791 fix->visual = FB_VISUAL_TRUECOLOR;
792 fix->xpanstep = 1;
793 fix->ypanstep = 1;
794 }
795
796 static void update_lcdc(struct fb_info *info)
797 {
798 struct fb_var_screeninfo *var = &info->var;
799 struct mfb_info *mfbi = info->par;
800 struct fsl_diu_data *data = mfbi->parent;
801 struct diu __iomem *hw;
802 int i, j;
803 u8 *gamma_table_base;
804
805 u32 temp;
806
807 hw = data->diu_reg;
808
809 if (diu_ops.set_monitor_port)
810 diu_ops.set_monitor_port(data->monitor_port);
811 gamma_table_base = data->gamma;
812
813 /* Prep for DIU init - gamma table, cursor table */
814
815 for (i = 0; i <= 2; i++)
816 for (j = 0; j <= 255; j++)
817 *gamma_table_base++ = j;
818
819 if (diu_ops.set_gamma_table)
820 diu_ops.set_gamma_table(data->monitor_port, data->gamma);
821
822 disable_lcdc(info);
823
824 /* Program DIU registers */
825
826 out_be32(&hw->gamma, DMA_ADDR(data, gamma));
827 out_be32(&hw->cursor, DMA_ADDR(data, cursor));
828
829 out_be32(&hw->bgnd, 0x007F7F7F); /* Set background to grey */
830 out_be32(&hw->disp_size, (var->yres << 16) | var->xres);
831
832 /* Horizontal and vertical configuration register */
833 temp = var->left_margin << 22 | /* BP_H */
834 var->hsync_len << 11 | /* PW_H */
835 var->right_margin; /* FP_H */
836
837 out_be32(&hw->hsyn_para, temp);
838
839 temp = var->upper_margin << 22 | /* BP_V */
840 var->vsync_len << 11 | /* PW_V */
841 var->lower_margin; /* FP_V */
842
843 out_be32(&hw->vsyn_para, temp);
844
845 diu_ops.set_pixel_clock(var->pixclock);
846
847 #ifndef CONFIG_PPC_MPC512x
848 /*
849 * The PLUT register is defined differently on the MPC5121 than it
850 * is on other SOCs. Unfortunately, there's no documentation that
851 * explains how it's supposed to be programmed, so for now, we leave
852 * it at the default value on the MPC5121.
853 *
854 * For other SOCs, program it for the highest priority, which will
855 * reduce the chance of underrun. Technically, we should scale the
856 * priority to match the screen resolution, but doing that properly
857 * requires delicate fine-tuning for each use-case.
858 */
859 out_be32(&hw->plut, 0x01F5F666);
860 #endif
861
862 /* Enable the DIU */
863 enable_lcdc(info);
864 }
865
866 static int map_video_memory(struct fb_info *info)
867 {
868 u32 smem_len = info->fix.line_length * info->var.yres_virtual;
869 void *p;
870
871 p = alloc_pages_exact(smem_len, GFP_DMA | __GFP_ZERO);
872 if (!p) {
873 dev_err(info->dev, "unable to allocate fb memory\n");
874 return -ENOMEM;
875 }
876 mutex_lock(&info->mm_lock);
877 info->screen_base = p;
878 info->fix.smem_start = virt_to_phys(info->screen_base);
879 info->fix.smem_len = smem_len;
880 mutex_unlock(&info->mm_lock);
881 info->screen_size = info->fix.smem_len;
882
883 return 0;
884 }
885
886 static void unmap_video_memory(struct fb_info *info)
887 {
888 void *p = info->screen_base;
889 size_t l = info->fix.smem_len;
890
891 mutex_lock(&info->mm_lock);
892 info->screen_base = NULL;
893 info->fix.smem_start = 0;
894 info->fix.smem_len = 0;
895 mutex_unlock(&info->mm_lock);
896
897 if (p)
898 free_pages_exact(p, l);
899 }
900
901 /*
902 * Using the fb_var_screeninfo in fb_info we set the aoi of this
903 * particular framebuffer. It is a light version of fsl_diu_set_par.
904 */
905 static int fsl_diu_set_aoi(struct fb_info *info)
906 {
907 struct fb_var_screeninfo *var = &info->var;
908 struct mfb_info *mfbi = info->par;
909 struct diu_ad *ad = mfbi->ad;
910
911 /* AOI should not be greater than display size */
912 ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
913 ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
914 return 0;
915 }
916
917 /**
918 * fsl_diu_get_pixel_format: return the pixel format for a given color depth
919 *
920 * The pixel format is a 32-bit value that determine which bits in each
921 * pixel are to be used for each color. This is the default function used
922 * if the platform does not define its own version.
923 */
924 static u32 fsl_diu_get_pixel_format(unsigned int bits_per_pixel)
925 {
926 #define PF_BYTE_F 0x10000000
927 #define PF_ALPHA_C_MASK 0x0E000000
928 #define PF_ALPHA_C_SHIFT 25
929 #define PF_BLUE_C_MASK 0x01800000
930 #define PF_BLUE_C_SHIFT 23
931 #define PF_GREEN_C_MASK 0x00600000
932 #define PF_GREEN_C_SHIFT 21
933 #define PF_RED_C_MASK 0x00180000
934 #define PF_RED_C_SHIFT 19
935 #define PF_PALETTE 0x00040000
936 #define PF_PIXEL_S_MASK 0x00030000
937 #define PF_PIXEL_S_SHIFT 16
938 #define PF_COMP_3_MASK 0x0000F000
939 #define PF_COMP_3_SHIFT 12
940 #define PF_COMP_2_MASK 0x00000F00
941 #define PF_COMP_2_SHIFT 8
942 #define PF_COMP_1_MASK 0x000000F0
943 #define PF_COMP_1_SHIFT 4
944 #define PF_COMP_0_MASK 0x0000000F
945 #define PF_COMP_0_SHIFT 0
946
947 #define MAKE_PF(alpha, red, blue, green, size, c0, c1, c2, c3) \
948 cpu_to_le32(PF_BYTE_F | (alpha << PF_ALPHA_C_SHIFT) | \
949 (blue << PF_BLUE_C_SHIFT) | (green << PF_GREEN_C_SHIFT) | \
950 (red << PF_RED_C_SHIFT) | (c3 << PF_COMP_3_SHIFT) | \
951 (c2 << PF_COMP_2_SHIFT) | (c1 << PF_COMP_1_SHIFT) | \
952 (c0 << PF_COMP_0_SHIFT) | (size << PF_PIXEL_S_SHIFT))
953
954 switch (bits_per_pixel) {
955 case 32:
956 /* 0x88883316 */
957 return MAKE_PF(3, 2, 0, 1, 3, 8, 8, 8, 8);
958 case 24:
959 /* 0x88082219 */
960 return MAKE_PF(4, 0, 1, 2, 2, 0, 8, 8, 8);
961 case 16:
962 /* 0x65053118 */
963 return MAKE_PF(4, 2, 1, 0, 1, 5, 6, 5, 0);
964 default:
965 pr_err("fsl-diu: unsupported color depth %u\n", bits_per_pixel);
966 return 0;
967 }
968 }
969
970 /*
971 * Using the fb_var_screeninfo in fb_info we set the resolution of this
972 * particular framebuffer. This function alters the fb_fix_screeninfo stored
973 * in fb_info. It does not alter var in fb_info since we are using that
974 * data. This means we depend on the data in var inside fb_info to be
975 * supported by the hardware. fsl_diu_check_var is always called before
976 * fsl_diu_set_par to ensure this.
977 */
978 static int fsl_diu_set_par(struct fb_info *info)
979 {
980 unsigned long len;
981 struct fb_var_screeninfo *var = &info->var;
982 struct mfb_info *mfbi = info->par;
983 struct fsl_diu_data *data = mfbi->parent;
984 struct diu_ad *ad = mfbi->ad;
985 struct diu __iomem *hw;
986
987 hw = data->diu_reg;
988
989 set_fix(info);
990
991 len = info->var.yres_virtual * info->fix.line_length;
992 /* Alloc & dealloc each time resolution/bpp change */
993 if (len != info->fix.smem_len) {
994 if (info->fix.smem_start)
995 unmap_video_memory(info);
996
997 /* Memory allocation for framebuffer */
998 if (map_video_memory(info)) {
999 dev_err(info->dev, "unable to allocate fb memory 1\n");
1000 return -ENOMEM;
1001 }
1002 }
1003
1004 if (diu_ops.get_pixel_format)
1005 ad->pix_fmt = diu_ops.get_pixel_format(data->monitor_port,
1006 var->bits_per_pixel);
1007 else
1008 ad->pix_fmt = fsl_diu_get_pixel_format(var->bits_per_pixel);
1009
1010 ad->addr = cpu_to_le32(info->fix.smem_start);
1011 ad->src_size_g_alpha = cpu_to_le32((var->yres_virtual << 12) |
1012 var->xres_virtual) | mfbi->g_alpha;
1013 /* AOI should not be greater than display size */
1014 ad->aoi_size = cpu_to_le32((var->yres << 16) | var->xres);
1015 ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
1016 ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
1017
1018 /* Disable chroma keying function */
1019 ad->ckmax_r = 0;
1020 ad->ckmax_g = 0;
1021 ad->ckmax_b = 0;
1022
1023 ad->ckmin_r = 255;
1024 ad->ckmin_g = 255;
1025 ad->ckmin_b = 255;
1026
1027 if (mfbi->index == PLANE0)
1028 update_lcdc(info);
1029 return 0;
1030 }
1031
1032 static inline __u32 CNVT_TOHW(__u32 val, __u32 width)
1033 {
1034 return ((val << width) + 0x7FFF - val) >> 16;
1035 }
1036
1037 /*
1038 * Set a single color register. The values supplied have a 16 bit magnitude
1039 * which needs to be scaled in this function for the hardware. Things to take
1040 * into consideration are how many color registers, if any, are supported with
1041 * the current color visual. With truecolor mode no color palettes are
1042 * supported. Here a pseudo palette is created which we store the value in
1043 * pseudo_palette in struct fb_info. For pseudocolor mode we have a limited
1044 * color palette.
1045 */
1046 static int fsl_diu_setcolreg(unsigned int regno, unsigned int red,
1047 unsigned int green, unsigned int blue,
1048 unsigned int transp, struct fb_info *info)
1049 {
1050 int ret = 1;
1051
1052 /*
1053 * If greyscale is true, then we convert the RGB value
1054 * to greyscale no matter what visual we are using.
1055 */
1056 if (info->var.grayscale)
1057 red = green = blue = (19595 * red + 38470 * green +
1058 7471 * blue) >> 16;
1059 switch (info->fix.visual) {
1060 case FB_VISUAL_TRUECOLOR:
1061 /*
1062 * 16-bit True Colour. We encode the RGB value
1063 * according to the RGB bitfield information.
1064 */
1065 if (regno < 16) {
1066 u32 *pal = info->pseudo_palette;
1067 u32 v;
1068
1069 red = CNVT_TOHW(red, info->var.red.length);
1070 green = CNVT_TOHW(green, info->var.green.length);
1071 blue = CNVT_TOHW(blue, info->var.blue.length);
1072 transp = CNVT_TOHW(transp, info->var.transp.length);
1073
1074 v = (red << info->var.red.offset) |
1075 (green << info->var.green.offset) |
1076 (blue << info->var.blue.offset) |
1077 (transp << info->var.transp.offset);
1078
1079 pal[regno] = v;
1080 ret = 0;
1081 }
1082 break;
1083 }
1084
1085 return ret;
1086 }
1087
1088 /*
1089 * Pan (or wrap, depending on the `vmode' field) the display using the
1090 * 'xoffset' and 'yoffset' fields of the 'var' structure. If the values
1091 * don't fit, return -EINVAL.
1092 */
1093 static int fsl_diu_pan_display(struct fb_var_screeninfo *var,
1094 struct fb_info *info)
1095 {
1096 if ((info->var.xoffset == var->xoffset) &&
1097 (info->var.yoffset == var->yoffset))
1098 return 0; /* No change, do nothing */
1099
1100 if (var->xoffset < 0 || var->yoffset < 0
1101 || var->xoffset + info->var.xres > info->var.xres_virtual
1102 || var->yoffset + info->var.yres > info->var.yres_virtual)
1103 return -EINVAL;
1104
1105 info->var.xoffset = var->xoffset;
1106 info->var.yoffset = var->yoffset;
1107
1108 if (var->vmode & FB_VMODE_YWRAP)
1109 info->var.vmode |= FB_VMODE_YWRAP;
1110 else
1111 info->var.vmode &= ~FB_VMODE_YWRAP;
1112
1113 fsl_diu_set_aoi(info);
1114
1115 return 0;
1116 }
1117
1118 static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
1119 unsigned long arg)
1120 {
1121 struct mfb_info *mfbi = info->par;
1122 struct diu_ad *ad = mfbi->ad;
1123 struct mfb_chroma_key ck;
1124 unsigned char global_alpha;
1125 struct aoi_display_offset aoi_d;
1126 __u32 pix_fmt;
1127 void __user *buf = (void __user *)arg;
1128
1129 if (!arg)
1130 return -EINVAL;
1131
1132 dev_dbg(info->dev, "ioctl %08x (dir=%s%s type=%u nr=%u size=%u)\n", cmd,
1133 _IOC_DIR(cmd) & _IOC_READ ? "R" : "",
1134 _IOC_DIR(cmd) & _IOC_WRITE ? "W" : "",
1135 _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
1136
1137 switch (cmd) {
1138 case MFB_SET_PIXFMT_OLD:
1139 dev_warn(info->dev,
1140 "MFB_SET_PIXFMT value of 0x%08x is deprecated.\n",
1141 MFB_SET_PIXFMT_OLD);
1142 case MFB_SET_PIXFMT:
1143 if (copy_from_user(&pix_fmt, buf, sizeof(pix_fmt)))
1144 return -EFAULT;
1145 ad->pix_fmt = pix_fmt;
1146 break;
1147 case MFB_GET_PIXFMT_OLD:
1148 dev_warn(info->dev,
1149 "MFB_GET_PIXFMT value of 0x%08x is deprecated.\n",
1150 MFB_GET_PIXFMT_OLD);
1151 case MFB_GET_PIXFMT:
1152 pix_fmt = ad->pix_fmt;
1153 if (copy_to_user(buf, &pix_fmt, sizeof(pix_fmt)))
1154 return -EFAULT;
1155 break;
1156 case MFB_SET_AOID:
1157 if (copy_from_user(&aoi_d, buf, sizeof(aoi_d)))
1158 return -EFAULT;
1159 mfbi->x_aoi_d = aoi_d.x_aoi_d;
1160 mfbi->y_aoi_d = aoi_d.y_aoi_d;
1161 fsl_diu_check_var(&info->var, info);
1162 fsl_diu_set_aoi(info);
1163 break;
1164 case MFB_GET_AOID:
1165 aoi_d.x_aoi_d = mfbi->x_aoi_d;
1166 aoi_d.y_aoi_d = mfbi->y_aoi_d;
1167 if (copy_to_user(buf, &aoi_d, sizeof(aoi_d)))
1168 return -EFAULT;
1169 break;
1170 case MFB_GET_ALPHA:
1171 global_alpha = mfbi->g_alpha;
1172 if (copy_to_user(buf, &global_alpha, sizeof(global_alpha)))
1173 return -EFAULT;
1174 break;
1175 case MFB_SET_ALPHA:
1176 /* set panel information */
1177 if (copy_from_user(&global_alpha, buf, sizeof(global_alpha)))
1178 return -EFAULT;
1179 ad->src_size_g_alpha = (ad->src_size_g_alpha & (~0xff)) |
1180 (global_alpha & 0xff);
1181 mfbi->g_alpha = global_alpha;
1182 break;
1183 case MFB_SET_CHROMA_KEY:
1184 /* set panel winformation */
1185 if (copy_from_user(&ck, buf, sizeof(ck)))
1186 return -EFAULT;
1187
1188 if (ck.enable &&
1189 (ck.red_max < ck.red_min ||
1190 ck.green_max < ck.green_min ||
1191 ck.blue_max < ck.blue_min))
1192 return -EINVAL;
1193
1194 if (!ck.enable) {
1195 ad->ckmax_r = 0;
1196 ad->ckmax_g = 0;
1197 ad->ckmax_b = 0;
1198 ad->ckmin_r = 255;
1199 ad->ckmin_g = 255;
1200 ad->ckmin_b = 255;
1201 } else {
1202 ad->ckmax_r = ck.red_max;
1203 ad->ckmax_g = ck.green_max;
1204 ad->ckmax_b = ck.blue_max;
1205 ad->ckmin_r = ck.red_min;
1206 ad->ckmin_g = ck.green_min;
1207 ad->ckmin_b = ck.blue_min;
1208 }
1209 break;
1210 #ifdef CONFIG_PPC_MPC512x
1211 case MFB_SET_GAMMA: {
1212 struct fsl_diu_data *data = mfbi->parent;
1213
1214 if (copy_from_user(data->gamma, buf, sizeof(data->gamma)))
1215 return -EFAULT;
1216 setbits32(&data->diu_reg->gamma, 0); /* Force table reload */
1217 break;
1218 }
1219 case MFB_GET_GAMMA: {
1220 struct fsl_diu_data *data = mfbi->parent;
1221
1222 if (copy_to_user(buf, data->gamma, sizeof(data->gamma)))
1223 return -EFAULT;
1224 break;
1225 }
1226 #endif
1227 default:
1228 dev_err(info->dev, "unknown ioctl command (0x%08X)\n", cmd);
1229 return -ENOIOCTLCMD;
1230 }
1231
1232 return 0;
1233 }
1234
1235 /* turn on fb if count == 1
1236 */
1237 static int fsl_diu_open(struct fb_info *info, int user)
1238 {
1239 struct mfb_info *mfbi = info->par;
1240 int res = 0;
1241
1242 /* free boot splash memory on first /dev/fb0 open */
1243 if ((mfbi->index == PLANE0) && diu_ops.release_bootmem)
1244 diu_ops.release_bootmem();
1245
1246 spin_lock(&diu_lock);
1247 mfbi->count++;
1248 if (mfbi->count == 1) {
1249 fsl_diu_check_var(&info->var, info);
1250 res = fsl_diu_set_par(info);
1251 if (res < 0)
1252 mfbi->count--;
1253 else {
1254 struct fsl_diu_data *data = mfbi->parent;
1255
1256 #ifdef CONFIG_NOT_COHERENT_CACHE
1257 /*
1258 * Enable underrun detection and vertical sync
1259 * interrupts.
1260 */
1261 clrbits32(&data->diu_reg->int_mask,
1262 INT_UNDRUN | INT_VSYNC);
1263 #else
1264 /* Enable underrun detection */
1265 clrbits32(&data->diu_reg->int_mask, INT_UNDRUN);
1266 #endif
1267 fsl_diu_enable_panel(info);
1268 }
1269 }
1270
1271 spin_unlock(&diu_lock);
1272 return res;
1273 }
1274
1275 /* turn off fb if count == 0
1276 */
1277 static int fsl_diu_release(struct fb_info *info, int user)
1278 {
1279 struct mfb_info *mfbi = info->par;
1280 int res = 0;
1281
1282 spin_lock(&diu_lock);
1283 mfbi->count--;
1284 if (mfbi->count == 0) {
1285 struct fsl_diu_data *data = mfbi->parent;
1286
1287 /* Disable interrupts */
1288 out_be32(&data->diu_reg->int_mask, 0xffffffff);
1289 fsl_diu_disable_panel(info);
1290 }
1291
1292 spin_unlock(&diu_lock);
1293 return res;
1294 }
1295
1296 static struct fb_ops fsl_diu_ops = {
1297 .owner = THIS_MODULE,
1298 .fb_check_var = fsl_diu_check_var,
1299 .fb_set_par = fsl_diu_set_par,
1300 .fb_setcolreg = fsl_diu_setcolreg,
1301 .fb_pan_display = fsl_diu_pan_display,
1302 .fb_fillrect = cfb_fillrect,
1303 .fb_copyarea = cfb_copyarea,
1304 .fb_imageblit = cfb_imageblit,
1305 .fb_ioctl = fsl_diu_ioctl,
1306 .fb_open = fsl_diu_open,
1307 .fb_release = fsl_diu_release,
1308 };
1309
1310 static int install_fb(struct fb_info *info)
1311 {
1312 int rc;
1313 struct mfb_info *mfbi = info->par;
1314 struct fsl_diu_data *data = mfbi->parent;
1315 const char *aoi_mode, *init_aoi_mode = "320x240";
1316 struct fb_videomode *db = fsl_diu_mode_db;
1317 unsigned int dbsize = ARRAY_SIZE(fsl_diu_mode_db);
1318 int has_default_mode = 1;
1319
1320 info->var.activate = FB_ACTIVATE_NOW;
1321 info->fbops = &fsl_diu_ops;
1322 info->flags = FBINFO_DEFAULT | FBINFO_VIRTFB | FBINFO_PARTIAL_PAN_OK |
1323 FBINFO_READS_FAST;
1324 info->pseudo_palette = mfbi->pseudo_palette;
1325
1326 rc = fb_alloc_cmap(&info->cmap, 16, 0);
1327 if (rc)
1328 return rc;
1329
1330 if (mfbi->index == PLANE0) {
1331 if (data->has_edid) {
1332 /* Now build modedb from EDID */
1333 fb_edid_to_monspecs(data->edid_data, &info->monspecs);
1334 fb_videomode_to_modelist(info->monspecs.modedb,
1335 info->monspecs.modedb_len,
1336 &info->modelist);
1337 db = info->monspecs.modedb;
1338 dbsize = info->monspecs.modedb_len;
1339 }
1340 aoi_mode = fb_mode;
1341 } else {
1342 aoi_mode = init_aoi_mode;
1343 }
1344 rc = fb_find_mode(&info->var, info, aoi_mode, db, dbsize, NULL,
1345 default_bpp);
1346 if (!rc) {
1347 /*
1348 * For plane 0 we continue and look into
1349 * driver's internal modedb.
1350 */
1351 if ((mfbi->index == PLANE0) && data->has_edid)
1352 has_default_mode = 0;
1353 else
1354 return -EINVAL;
1355 }
1356
1357 if (!has_default_mode) {
1358 rc = fb_find_mode(&info->var, info, aoi_mode, fsl_diu_mode_db,
1359 ARRAY_SIZE(fsl_diu_mode_db), NULL, default_bpp);
1360 if (rc)
1361 has_default_mode = 1;
1362 }
1363
1364 /* Still not found, use preferred mode from database if any */
1365 if (!has_default_mode && info->monspecs.modedb) {
1366 struct fb_monspecs *specs = &info->monspecs;
1367 struct fb_videomode *modedb = &specs->modedb[0];
1368
1369 /*
1370 * Get preferred timing. If not found,
1371 * first mode in database will be used.
1372 */
1373 if (specs->misc & FB_MISC_1ST_DETAIL) {
1374 int i;
1375
1376 for (i = 0; i < specs->modedb_len; i++) {
1377 if (specs->modedb[i].flag & FB_MODE_IS_FIRST) {
1378 modedb = &specs->modedb[i];
1379 break;
1380 }
1381 }
1382 }
1383
1384 info->var.bits_per_pixel = default_bpp;
1385 fb_videomode_to_var(&info->var, modedb);
1386 }
1387
1388 if (fsl_diu_check_var(&info->var, info)) {
1389 dev_err(info->dev, "fsl_diu_check_var failed\n");
1390 unmap_video_memory(info);
1391 fb_dealloc_cmap(&info->cmap);
1392 return -EINVAL;
1393 }
1394
1395 if (register_framebuffer(info) < 0) {
1396 dev_err(info->dev, "register_framebuffer failed\n");
1397 unmap_video_memory(info);
1398 fb_dealloc_cmap(&info->cmap);
1399 return -EINVAL;
1400 }
1401
1402 mfbi->registered = 1;
1403 dev_info(info->dev, "%s registered successfully\n", mfbi->id);
1404
1405 return 0;
1406 }
1407
1408 static void uninstall_fb(struct fb_info *info)
1409 {
1410 struct mfb_info *mfbi = info->par;
1411
1412 if (!mfbi->registered)
1413 return;
1414
1415 unregister_framebuffer(info);
1416 unmap_video_memory(info);
1417 if (&info->cmap)
1418 fb_dealloc_cmap(&info->cmap);
1419
1420 mfbi->registered = 0;
1421 }
1422
1423 static irqreturn_t fsl_diu_isr(int irq, void *dev_id)
1424 {
1425 struct diu __iomem *hw = dev_id;
1426 uint32_t status = in_be32(&hw->int_status);
1427
1428 if (status) {
1429 /* This is the workaround for underrun */
1430 if (status & INT_UNDRUN) {
1431 out_be32(&hw->diu_mode, 0);
1432 udelay(1);
1433 out_be32(&hw->diu_mode, 1);
1434 }
1435 #if defined(CONFIG_NOT_COHERENT_CACHE)
1436 else if (status & INT_VSYNC) {
1437 unsigned int i;
1438
1439 for (i = 0; i < coherence_data_size;
1440 i += d_cache_line_size)
1441 __asm__ __volatile__ (
1442 "dcbz 0, %[input]"
1443 ::[input]"r"(&coherence_data[i]));
1444 }
1445 #endif
1446 return IRQ_HANDLED;
1447 }
1448 return IRQ_NONE;
1449 }
1450
1451 #ifdef CONFIG_PM
1452 /*
1453 * Power management hooks. Note that we won't be called from IRQ context,
1454 * unlike the blank functions above, so we may sleep.
1455 */
1456 static int fsl_diu_suspend(struct platform_device *ofdev, pm_message_t state)
1457 {
1458 struct fsl_diu_data *data;
1459
1460 data = dev_get_drvdata(&ofdev->dev);
1461 disable_lcdc(data->fsl_diu_info);
1462
1463 return 0;
1464 }
1465
1466 static int fsl_diu_resume(struct platform_device *ofdev)
1467 {
1468 struct fsl_diu_data *data;
1469
1470 data = dev_get_drvdata(&ofdev->dev);
1471 enable_lcdc(data->fsl_diu_info);
1472
1473 return 0;
1474 }
1475
1476 #else
1477 #define fsl_diu_suspend NULL
1478 #define fsl_diu_resume NULL
1479 #endif /* CONFIG_PM */
1480
1481 static ssize_t store_monitor(struct device *device,
1482 struct device_attribute *attr, const char *buf, size_t count)
1483 {
1484 enum fsl_diu_monitor_port old_monitor_port;
1485 struct fsl_diu_data *data =
1486 container_of(attr, struct fsl_diu_data, dev_attr);
1487
1488 old_monitor_port = data->monitor_port;
1489 data->monitor_port = fsl_diu_name_to_port(buf);
1490
1491 if (old_monitor_port != data->monitor_port) {
1492 /* All AOIs need adjust pixel format
1493 * fsl_diu_set_par only change the pixsel format here
1494 * unlikely to fail. */
1495 unsigned int i;
1496
1497 for (i=0; i < NUM_AOIS; i++)
1498 fsl_diu_set_par(&data->fsl_diu_info[i]);
1499 }
1500 return count;
1501 }
1502
1503 static ssize_t show_monitor(struct device *device,
1504 struct device_attribute *attr, char *buf)
1505 {
1506 struct fsl_diu_data *data =
1507 container_of(attr, struct fsl_diu_data, dev_attr);
1508
1509 switch (data->monitor_port) {
1510 case FSL_DIU_PORT_DVI:
1511 return sprintf(buf, "DVI\n");
1512 case FSL_DIU_PORT_LVDS:
1513 return sprintf(buf, "Single-link LVDS\n");
1514 case FSL_DIU_PORT_DLVDS:
1515 return sprintf(buf, "Dual-link LVDS\n");
1516 }
1517
1518 return 0;
1519 }
1520
1521 static int fsl_diu_probe(struct platform_device *pdev)
1522 {
1523 struct device_node *np = pdev->dev.of_node;
1524 struct mfb_info *mfbi;
1525 struct fsl_diu_data *data;
1526 dma_addr_t dma_addr; /* DMA addr of fsl_diu_data struct */
1527 const void *prop;
1528 unsigned int i;
1529 int ret;
1530
1531 data = dmam_alloc_coherent(&pdev->dev, sizeof(struct fsl_diu_data),
1532 &dma_addr, GFP_DMA | __GFP_ZERO);
1533 if (!data)
1534 return -ENOMEM;
1535 data->dma_addr = dma_addr;
1536
1537 /*
1538 * dma_alloc_coherent() uses a page allocator, so the address is
1539 * always page-aligned. We need the memory to be 32-byte aligned,
1540 * so that's good. However, if one day the allocator changes, we
1541 * need to catch that. It's not worth the effort to handle unaligned
1542 * alloctions now because it's highly unlikely to ever be a problem.
1543 */
1544 if ((unsigned long)data & 31) {
1545 dev_err(&pdev->dev, "misaligned allocation");
1546 ret = -ENOMEM;
1547 goto error;
1548 }
1549
1550 spin_lock_init(&data->reg_lock);
1551
1552 for (i = 0; i < NUM_AOIS; i++) {
1553 struct fb_info *info = &data->fsl_diu_info[i];
1554
1555 info->device = &pdev->dev;
1556 info->par = &data->mfb[i];
1557
1558 /*
1559 * We store the physical address of the AD in the reserved
1560 * 'paddr' field of the AD itself.
1561 */
1562 data->ad[i].paddr = DMA_ADDR(data, ad[i]);
1563
1564 info->fix.smem_start = 0;
1565
1566 /* Initialize the AOI data structure */
1567 mfbi = info->par;
1568 memcpy(mfbi, &mfb_template[i], sizeof(struct mfb_info));
1569 mfbi->parent = data;
1570 mfbi->ad = &data->ad[i];
1571 }
1572
1573 /* Get the EDID data from the device tree, if present */
1574 prop = of_get_property(np, "edid", &ret);
1575 if (prop && ret == EDID_LENGTH) {
1576 memcpy(data->edid_data, prop, EDID_LENGTH);
1577 data->has_edid = true;
1578 }
1579
1580 data->diu_reg = of_iomap(np, 0);
1581 if (!data->diu_reg) {
1582 dev_err(&pdev->dev, "cannot map DIU registers\n");
1583 ret = -EFAULT;
1584 goto error;
1585 }
1586
1587 /* Get the IRQ of the DIU */
1588 data->irq = irq_of_parse_and_map(np, 0);
1589
1590 if (!data->irq) {
1591 dev_err(&pdev->dev, "could not get DIU IRQ\n");
1592 ret = -EINVAL;
1593 goto error;
1594 }
1595 data->monitor_port = monitor_port;
1596
1597 /* Initialize the dummy Area Descriptor */
1598 data->dummy_ad.addr = cpu_to_le32(DMA_ADDR(data, dummy_aoi));
1599 data->dummy_ad.pix_fmt = 0x88882317;
1600 data->dummy_ad.src_size_g_alpha = cpu_to_le32((4 << 12) | 4);
1601 data->dummy_ad.aoi_size = cpu_to_le32((4 << 16) | 2);
1602 data->dummy_ad.offset_xyi = 0;
1603 data->dummy_ad.offset_xyd = 0;
1604 data->dummy_ad.next_ad = 0;
1605 data->dummy_ad.paddr = DMA_ADDR(data, dummy_ad);
1606
1607 /*
1608 * Let DIU continue to display splash screen if it was pre-initialized
1609 * by the bootloader; otherwise, clear the display.
1610 */
1611 if (in_be32(&data->diu_reg->diu_mode) == MFB_MODE0)
1612 out_be32(&data->diu_reg->desc[0], 0);
1613
1614 out_be32(&data->diu_reg->desc[1], data->dummy_ad.paddr);
1615 out_be32(&data->diu_reg->desc[2], data->dummy_ad.paddr);
1616
1617 for (i = 0; i < NUM_AOIS; i++) {
1618 ret = install_fb(&data->fsl_diu_info[i]);
1619 if (ret) {
1620 dev_err(&pdev->dev, "could not register fb %d\n", i);
1621 goto error;
1622 }
1623 }
1624
1625 /*
1626 * Older versions of U-Boot leave interrupts enabled, so disable
1627 * all of them and clear the status register.
1628 */
1629 out_be32(&data->diu_reg->int_mask, 0xffffffff);
1630 in_be32(&data->diu_reg->int_status);
1631
1632 ret = request_irq(data->irq, fsl_diu_isr, 0, "fsl-diu-fb",
1633 &data->diu_reg);
1634 if (ret) {
1635 dev_err(&pdev->dev, "could not claim irq\n");
1636 goto error;
1637 }
1638
1639 sysfs_attr_init(&data->dev_attr.attr);
1640 data->dev_attr.attr.name = "monitor";
1641 data->dev_attr.attr.mode = S_IRUGO|S_IWUSR;
1642 data->dev_attr.show = show_monitor;
1643 data->dev_attr.store = store_monitor;
1644 ret = device_create_file(&pdev->dev, &data->dev_attr);
1645 if (ret) {
1646 dev_err(&pdev->dev, "could not create sysfs file %s\n",
1647 data->dev_attr.attr.name);
1648 }
1649
1650 dev_set_drvdata(&pdev->dev, data);
1651 return 0;
1652
1653 error:
1654 for (i = 0; i < NUM_AOIS; i++)
1655 uninstall_fb(&data->fsl_diu_info[i]);
1656
1657 iounmap(data->diu_reg);
1658
1659 return ret;
1660 }
1661
1662 static int fsl_diu_remove(struct platform_device *pdev)
1663 {
1664 struct fsl_diu_data *data;
1665 int i;
1666
1667 data = dev_get_drvdata(&pdev->dev);
1668 disable_lcdc(&data->fsl_diu_info[0]);
1669
1670 free_irq(data->irq, &data->diu_reg);
1671
1672 for (i = 0; i < NUM_AOIS; i++)
1673 uninstall_fb(&data->fsl_diu_info[i]);
1674
1675 iounmap(data->diu_reg);
1676
1677 return 0;
1678 }
1679
1680 #ifndef MODULE
1681 static int __init fsl_diu_setup(char *options)
1682 {
1683 char *opt;
1684 unsigned long val;
1685
1686 if (!options || !*options)
1687 return 0;
1688
1689 while ((opt = strsep(&options, ",")) != NULL) {
1690 if (!*opt)
1691 continue;
1692 if (!strncmp(opt, "monitor=", 8)) {
1693 monitor_port = fsl_diu_name_to_port(opt + 8);
1694 } else if (!strncmp(opt, "bpp=", 4)) {
1695 if (!strict_strtoul(opt + 4, 10, &val))
1696 default_bpp = val;
1697 } else
1698 fb_mode = opt;
1699 }
1700
1701 return 0;
1702 }
1703 #endif
1704
1705 static struct of_device_id fsl_diu_match[] = {
1706 #ifdef CONFIG_PPC_MPC512x
1707 {
1708 .compatible = "fsl,mpc5121-diu",
1709 },
1710 #endif
1711 {
1712 .compatible = "fsl,diu",
1713 },
1714 {}
1715 };
1716 MODULE_DEVICE_TABLE(of, fsl_diu_match);
1717
1718 static struct platform_driver fsl_diu_driver = {
1719 .driver = {
1720 .name = "fsl-diu-fb",
1721 .owner = THIS_MODULE,
1722 .of_match_table = fsl_diu_match,
1723 },
1724 .probe = fsl_diu_probe,
1725 .remove = fsl_diu_remove,
1726 .suspend = fsl_diu_suspend,
1727 .resume = fsl_diu_resume,
1728 };
1729
1730 static int __init fsl_diu_init(void)
1731 {
1732 #ifdef CONFIG_NOT_COHERENT_CACHE
1733 struct device_node *np;
1734 const u32 *prop;
1735 #endif
1736 int ret;
1737 #ifndef MODULE
1738 char *option;
1739
1740 /*
1741 * For kernel boot options (in 'video=xxxfb:<options>' format)
1742 */
1743 if (fb_get_options("fslfb", &option))
1744 return -ENODEV;
1745 fsl_diu_setup(option);
1746 #else
1747 monitor_port = fsl_diu_name_to_port(monitor_string);
1748 #endif
1749 pr_info("Freescale Display Interface Unit (DIU) framebuffer driver\n");
1750
1751 #ifdef CONFIG_NOT_COHERENT_CACHE
1752 np = of_find_node_by_type(NULL, "cpu");
1753 if (!np) {
1754 pr_err("fsl-diu-fb: can't find 'cpu' device node\n");
1755 return -ENODEV;
1756 }
1757
1758 prop = of_get_property(np, "d-cache-size", NULL);
1759 if (prop == NULL) {
1760 pr_err("fsl-diu-fb: missing 'd-cache-size' property' "
1761 "in 'cpu' node\n");
1762 of_node_put(np);
1763 return -ENODEV;
1764 }
1765
1766 /*
1767 * Freescale PLRU requires 13/8 times the cache size to do a proper
1768 * displacement flush
1769 */
1770 coherence_data_size = be32_to_cpup(prop) * 13;
1771 coherence_data_size /= 8;
1772
1773 pr_debug("fsl-diu-fb: coherence data size is %zu bytes\n",
1774 coherence_data_size);
1775
1776 prop = of_get_property(np, "d-cache-line-size", NULL);
1777 if (prop == NULL) {
1778 pr_err("fsl-diu-fb: missing 'd-cache-line-size' property' "
1779 "in 'cpu' node\n");
1780 of_node_put(np);
1781 return -ENODEV;
1782 }
1783 d_cache_line_size = be32_to_cpup(prop);
1784
1785 pr_debug("fsl-diu-fb: cache lines size is %u bytes\n",
1786 d_cache_line_size);
1787
1788 of_node_put(np);
1789 coherence_data = vmalloc(coherence_data_size);
1790 if (!coherence_data) {
1791 pr_err("fsl-diu-fb: could not allocate coherence data "
1792 "(size=%zu)\n", coherence_data_size);
1793 return -ENOMEM;
1794 }
1795
1796 #endif
1797
1798 ret = platform_driver_register(&fsl_diu_driver);
1799 if (ret) {
1800 pr_err("fsl-diu-fb: failed to register platform driver\n");
1801 #if defined(CONFIG_NOT_COHERENT_CACHE)
1802 vfree(coherence_data);
1803 #endif
1804 }
1805 return ret;
1806 }
1807
1808 static void __exit fsl_diu_exit(void)
1809 {
1810 platform_driver_unregister(&fsl_diu_driver);
1811 #if defined(CONFIG_NOT_COHERENT_CACHE)
1812 vfree(coherence_data);
1813 #endif
1814 }
1815
1816 module_init(fsl_diu_init);
1817 module_exit(fsl_diu_exit);
1818
1819 MODULE_AUTHOR("York Sun <yorksun@freescale.com>");
1820 MODULE_DESCRIPTION("Freescale DIU framebuffer driver");
1821 MODULE_LICENSE("GPL");
1822
1823 module_param_named(mode, fb_mode, charp, 0);
1824 MODULE_PARM_DESC(mode,
1825 "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
1826 module_param_named(bpp, default_bpp, ulong, 0);
1827 MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified in 'mode'");
1828 module_param_named(monitor, monitor_string, charp, 0);
1829 MODULE_PARM_DESC(monitor, "Specify the monitor port "
1830 "(\"dvi\", \"lvds\", or \"dlvds\") if supported by the platform");
1831
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