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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64...
[mirror_ubuntu-zesty-kernel.git] / drivers / video / fbdev / fsl-diu-fb.c
1 /*
2 * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
3 *
4 * Freescale DIU Frame Buffer device driver
5 *
6 * Authors: Hongjun Chen <hong-jun.chen@freescale.com>
7 * Paul Widmer <paul.widmer@freescale.com>
8 * Srikanth Srinivasan <srikanth.srinivasan@freescale.com>
9 * York Sun <yorksun@freescale.com>
10 *
11 * Based on imxfb.c Copyright (C) 2004 S.Hauer, Pengutronix
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 *
18 */
19
20 #include <linux/module.h>
21 #include <linux/kernel.h>
22 #include <linux/errno.h>
23 #include <linux/string.h>
24 #include <linux/slab.h>
25 #include <linux/fb.h>
26 #include <linux/init.h>
27 #include <linux/dma-mapping.h>
28 #include <linux/platform_device.h>
29 #include <linux/interrupt.h>
30 #include <linux/clk.h>
31 #include <linux/uaccess.h>
32 #include <linux/vmalloc.h>
33 #include <linux/spinlock.h>
34 #include <linux/of_address.h>
35 #include <linux/of_irq.h>
36
37 #include <sysdev/fsl_soc.h>
38 #include <linux/fsl-diu-fb.h>
39 #include "edid.h"
40
41 #define NUM_AOIS 5 /* 1 for plane 0, 2 for planes 1 & 2 each */
42
43 /* HW cursor parameters */
44 #define MAX_CURS 32
45
46 /* INT_STATUS/INT_MASK field descriptions */
47 #define INT_VSYNC 0x01 /* Vsync interrupt */
48 #define INT_VSYNC_WB 0x02 /* Vsync interrupt for write back operation */
49 #define INT_UNDRUN 0x04 /* Under run exception interrupt */
50 #define INT_PARERR 0x08 /* Display parameters error interrupt */
51 #define INT_LS_BF_VS 0x10 /* Lines before vsync. interrupt */
52
53 /*
54 * List of supported video modes
55 *
56 * The first entry is the default video mode. The remain entries are in
57 * order if increasing resolution and frequency. The 320x240-60 mode is
58 * the initial AOI for the second and third planes.
59 */
60 static struct fb_videomode fsl_diu_mode_db[] = {
61 {
62 .refresh = 60,
63 .xres = 1024,
64 .yres = 768,
65 .pixclock = 15385,
66 .left_margin = 160,
67 .right_margin = 24,
68 .upper_margin = 29,
69 .lower_margin = 3,
70 .hsync_len = 136,
71 .vsync_len = 6,
72 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
73 .vmode = FB_VMODE_NONINTERLACED
74 },
75 {
76 .refresh = 60,
77 .xres = 320,
78 .yres = 240,
79 .pixclock = 79440,
80 .left_margin = 16,
81 .right_margin = 16,
82 .upper_margin = 16,
83 .lower_margin = 5,
84 .hsync_len = 48,
85 .vsync_len = 1,
86 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
87 .vmode = FB_VMODE_NONINTERLACED
88 },
89 {
90 .refresh = 60,
91 .xres = 640,
92 .yres = 480,
93 .pixclock = 39722,
94 .left_margin = 48,
95 .right_margin = 16,
96 .upper_margin = 33,
97 .lower_margin = 10,
98 .hsync_len = 96,
99 .vsync_len = 2,
100 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
101 .vmode = FB_VMODE_NONINTERLACED
102 },
103 {
104 .refresh = 72,
105 .xres = 640,
106 .yres = 480,
107 .pixclock = 32052,
108 .left_margin = 128,
109 .right_margin = 24,
110 .upper_margin = 28,
111 .lower_margin = 9,
112 .hsync_len = 40,
113 .vsync_len = 3,
114 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
115 .vmode = FB_VMODE_NONINTERLACED
116 },
117 {
118 .refresh = 75,
119 .xres = 640,
120 .yres = 480,
121 .pixclock = 31747,
122 .left_margin = 120,
123 .right_margin = 16,
124 .upper_margin = 16,
125 .lower_margin = 1,
126 .hsync_len = 64,
127 .vsync_len = 3,
128 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
129 .vmode = FB_VMODE_NONINTERLACED
130 },
131 {
132 .refresh = 90,
133 .xres = 640,
134 .yres = 480,
135 .pixclock = 25057,
136 .left_margin = 120,
137 .right_margin = 32,
138 .upper_margin = 14,
139 .lower_margin = 25,
140 .hsync_len = 40,
141 .vsync_len = 14,
142 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
143 .vmode = FB_VMODE_NONINTERLACED
144 },
145 {
146 .refresh = 100,
147 .xres = 640,
148 .yres = 480,
149 .pixclock = 22272,
150 .left_margin = 48,
151 .right_margin = 32,
152 .upper_margin = 17,
153 .lower_margin = 22,
154 .hsync_len = 128,
155 .vsync_len = 12,
156 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
157 .vmode = FB_VMODE_NONINTERLACED
158 },
159 {
160 .refresh = 60,
161 .xres = 800,
162 .yres = 480,
163 .pixclock = 33805,
164 .left_margin = 96,
165 .right_margin = 24,
166 .upper_margin = 10,
167 .lower_margin = 3,
168 .hsync_len = 72,
169 .vsync_len = 7,
170 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
171 .vmode = FB_VMODE_NONINTERLACED
172 },
173 {
174 .refresh = 60,
175 .xres = 800,
176 .yres = 600,
177 .pixclock = 25000,
178 .left_margin = 88,
179 .right_margin = 40,
180 .upper_margin = 23,
181 .lower_margin = 1,
182 .hsync_len = 128,
183 .vsync_len = 4,
184 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
185 .vmode = FB_VMODE_NONINTERLACED
186 },
187 {
188 .refresh = 60,
189 .xres = 854,
190 .yres = 480,
191 .pixclock = 31518,
192 .left_margin = 104,
193 .right_margin = 16,
194 .upper_margin = 13,
195 .lower_margin = 1,
196 .hsync_len = 88,
197 .vsync_len = 3,
198 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
199 .vmode = FB_VMODE_NONINTERLACED
200 },
201 {
202 .refresh = 70,
203 .xres = 1024,
204 .yres = 768,
205 .pixclock = 16886,
206 .left_margin = 3,
207 .right_margin = 3,
208 .upper_margin = 2,
209 .lower_margin = 2,
210 .hsync_len = 40,
211 .vsync_len = 18,
212 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
213 .vmode = FB_VMODE_NONINTERLACED
214 },
215 {
216 .refresh = 75,
217 .xres = 1024,
218 .yres = 768,
219 .pixclock = 15009,
220 .left_margin = 3,
221 .right_margin = 3,
222 .upper_margin = 2,
223 .lower_margin = 2,
224 .hsync_len = 80,
225 .vsync_len = 32,
226 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
227 .vmode = FB_VMODE_NONINTERLACED
228 },
229 {
230 .refresh = 60,
231 .xres = 1280,
232 .yres = 480,
233 .pixclock = 18939,
234 .left_margin = 353,
235 .right_margin = 47,
236 .upper_margin = 39,
237 .lower_margin = 4,
238 .hsync_len = 8,
239 .vsync_len = 2,
240 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
241 .vmode = FB_VMODE_NONINTERLACED
242 },
243 {
244 .refresh = 60,
245 .xres = 1280,
246 .yres = 720,
247 .pixclock = 13426,
248 .left_margin = 192,
249 .right_margin = 64,
250 .upper_margin = 22,
251 .lower_margin = 1,
252 .hsync_len = 136,
253 .vsync_len = 3,
254 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
255 .vmode = FB_VMODE_NONINTERLACED
256 },
257 {
258 .refresh = 60,
259 .xres = 1280,
260 .yres = 1024,
261 .pixclock = 9375,
262 .left_margin = 38,
263 .right_margin = 128,
264 .upper_margin = 2,
265 .lower_margin = 7,
266 .hsync_len = 216,
267 .vsync_len = 37,
268 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
269 .vmode = FB_VMODE_NONINTERLACED
270 },
271 {
272 .refresh = 70,
273 .xres = 1280,
274 .yres = 1024,
275 .pixclock = 9380,
276 .left_margin = 6,
277 .right_margin = 6,
278 .upper_margin = 4,
279 .lower_margin = 4,
280 .hsync_len = 60,
281 .vsync_len = 94,
282 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
283 .vmode = FB_VMODE_NONINTERLACED
284 },
285 {
286 .refresh = 75,
287 .xres = 1280,
288 .yres = 1024,
289 .pixclock = 9380,
290 .left_margin = 6,
291 .right_margin = 6,
292 .upper_margin = 4,
293 .lower_margin = 4,
294 .hsync_len = 60,
295 .vsync_len = 15,
296 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
297 .vmode = FB_VMODE_NONINTERLACED
298 },
299 {
300 .refresh = 60,
301 .xres = 1920,
302 .yres = 1080,
303 .pixclock = 5787,
304 .left_margin = 328,
305 .right_margin = 120,
306 .upper_margin = 34,
307 .lower_margin = 1,
308 .hsync_len = 208,
309 .vsync_len = 3,
310 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
311 .vmode = FB_VMODE_NONINTERLACED
312 },
313 };
314
315 static char *fb_mode;
316 static unsigned long default_bpp = 32;
317 static enum fsl_diu_monitor_port monitor_port;
318 static char *monitor_string;
319
320 #if defined(CONFIG_NOT_COHERENT_CACHE)
321 static u8 *coherence_data;
322 static size_t coherence_data_size;
323 static unsigned int d_cache_line_size;
324 #endif
325
326 static DEFINE_SPINLOCK(diu_lock);
327
328 enum mfb_index {
329 PLANE0 = 0, /* Plane 0, only one AOI that fills the screen */
330 PLANE1_AOI0, /* Plane 1, first AOI */
331 PLANE1_AOI1, /* Plane 1, second AOI */
332 PLANE2_AOI0, /* Plane 2, first AOI */
333 PLANE2_AOI1, /* Plane 2, second AOI */
334 };
335
336 struct mfb_info {
337 enum mfb_index index;
338 char *id;
339 int registered;
340 unsigned long pseudo_palette[16];
341 struct diu_ad *ad;
342 unsigned char g_alpha;
343 unsigned int count;
344 int x_aoi_d; /* aoi display x offset to physical screen */
345 int y_aoi_d; /* aoi display y offset to physical screen */
346 struct fsl_diu_data *parent;
347 };
348
349 /**
350 * struct fsl_diu_data - per-DIU data structure
351 * @dma_addr: DMA address of this structure
352 * @fsl_diu_info: fb_info objects, one per AOI
353 * @dev_attr: sysfs structure
354 * @irq: IRQ
355 * @monitor_port: the monitor port this DIU is connected to
356 * @diu_reg: pointer to the DIU hardware registers
357 * @reg_lock: spinlock for register access
358 * @dummy_aoi: video buffer for the 4x4 32-bit dummy AOI
359 * dummy_ad: DIU Area Descriptor for the dummy AOI
360 * @ad[]: Area Descriptors for each real AOI
361 * @gamma: gamma color table
362 * @cursor: hardware cursor data
363 *
364 * This data structure must be allocated with 32-byte alignment, so that the
365 * internal fields can be aligned properly.
366 */
367 struct fsl_diu_data {
368 dma_addr_t dma_addr;
369 struct fb_info fsl_diu_info[NUM_AOIS];
370 struct mfb_info mfb[NUM_AOIS];
371 struct device_attribute dev_attr;
372 unsigned int irq;
373 enum fsl_diu_monitor_port monitor_port;
374 struct diu __iomem *diu_reg;
375 spinlock_t reg_lock;
376 u8 dummy_aoi[4 * 4 * 4];
377 struct diu_ad dummy_ad __aligned(8);
378 struct diu_ad ad[NUM_AOIS] __aligned(8);
379 u8 gamma[256 * 3] __aligned(32);
380 /* It's easier to parse the cursor data as little-endian */
381 __le16 cursor[MAX_CURS * MAX_CURS] __aligned(32);
382 /* Blank cursor data -- used to hide the cursor */
383 __le16 blank_cursor[MAX_CURS * MAX_CURS] __aligned(32);
384 uint8_t edid_data[EDID_LENGTH];
385 bool has_edid;
386 } __aligned(32);
387
388 /* Determine the DMA address of a member of the fsl_diu_data structure */
389 #define DMA_ADDR(p, f) ((p)->dma_addr + offsetof(struct fsl_diu_data, f))
390
391 static struct mfb_info mfb_template[] = {
392 {
393 .index = PLANE0,
394 .id = "Panel0",
395 .registered = 0,
396 .count = 0,
397 .x_aoi_d = 0,
398 .y_aoi_d = 0,
399 },
400 {
401 .index = PLANE1_AOI0,
402 .id = "Panel1 AOI0",
403 .registered = 0,
404 .g_alpha = 0xff,
405 .count = 0,
406 .x_aoi_d = 0,
407 .y_aoi_d = 0,
408 },
409 {
410 .index = PLANE1_AOI1,
411 .id = "Panel1 AOI1",
412 .registered = 0,
413 .g_alpha = 0xff,
414 .count = 0,
415 .x_aoi_d = 0,
416 .y_aoi_d = 480,
417 },
418 {
419 .index = PLANE2_AOI0,
420 .id = "Panel2 AOI0",
421 .registered = 0,
422 .g_alpha = 0xff,
423 .count = 0,
424 .x_aoi_d = 640,
425 .y_aoi_d = 0,
426 },
427 {
428 .index = PLANE2_AOI1,
429 .id = "Panel2 AOI1",
430 .registered = 0,
431 .g_alpha = 0xff,
432 .count = 0,
433 .x_aoi_d = 640,
434 .y_aoi_d = 480,
435 },
436 };
437
438 #ifdef DEBUG
439 static void __attribute__ ((unused)) fsl_diu_dump(struct diu __iomem *hw)
440 {
441 mb();
442 pr_debug("DIU: desc=%08x,%08x,%08x, gamma=%08x pallete=%08x "
443 "cursor=%08x curs_pos=%08x diu_mode=%08x bgnd=%08x "
444 "disp_size=%08x hsyn_para=%08x vsyn_para=%08x syn_pol=%08x "
445 "thresholds=%08x int_mask=%08x plut=%08x\n",
446 hw->desc[0], hw->desc[1], hw->desc[2], hw->gamma,
447 hw->pallete, hw->cursor, hw->curs_pos, hw->diu_mode,
448 hw->bgnd, hw->disp_size, hw->hsyn_para, hw->vsyn_para,
449 hw->syn_pol, hw->thresholds, hw->int_mask, hw->plut);
450 rmb();
451 }
452 #endif
453
454 /**
455 * fsl_diu_name_to_port - convert a port name to a monitor port enum
456 *
457 * Takes the name of a monitor port ("dvi", "lvds", or "dlvds") and returns
458 * the enum fsl_diu_monitor_port that corresponds to that string.
459 *
460 * For compatibility with older versions, a number ("0", "1", or "2") is also
461 * supported.
462 *
463 * If the string is unknown, DVI is assumed.
464 *
465 * If the particular port is not supported by the platform, another port
466 * (platform-specific) is chosen instead.
467 */
468 static enum fsl_diu_monitor_port fsl_diu_name_to_port(const char *s)
469 {
470 enum fsl_diu_monitor_port port = FSL_DIU_PORT_DVI;
471 unsigned long val;
472
473 if (s) {
474 if (!kstrtoul(s, 10, &val) && (val <= 2))
475 port = (enum fsl_diu_monitor_port) val;
476 else if (strncmp(s, "lvds", 4) == 0)
477 port = FSL_DIU_PORT_LVDS;
478 else if (strncmp(s, "dlvds", 5) == 0)
479 port = FSL_DIU_PORT_DLVDS;
480 }
481
482 if (diu_ops.valid_monitor_port)
483 port = diu_ops.valid_monitor_port(port);
484
485 return port;
486 }
487
488 /*
489 * Workaround for failed writing desc register of planes.
490 * Needed with MPC5121 DIU rev 2.0 silicon.
491 */
492 void wr_reg_wa(u32 *reg, u32 val)
493 {
494 do {
495 out_be32(reg, val);
496 } while (in_be32(reg) != val);
497 }
498
499 static void fsl_diu_enable_panel(struct fb_info *info)
500 {
501 struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
502 struct diu_ad *ad = mfbi->ad;
503 struct fsl_diu_data *data = mfbi->parent;
504 struct diu __iomem *hw = data->diu_reg;
505
506 switch (mfbi->index) {
507 case PLANE0:
508 wr_reg_wa(&hw->desc[0], ad->paddr);
509 break;
510 case PLANE1_AOI0:
511 cmfbi = &data->mfb[2];
512 if (hw->desc[1] != ad->paddr) { /* AOI0 closed */
513 if (cmfbi->count > 0) /* AOI1 open */
514 ad->next_ad =
515 cpu_to_le32(cmfbi->ad->paddr);
516 else
517 ad->next_ad = 0;
518 wr_reg_wa(&hw->desc[1], ad->paddr);
519 }
520 break;
521 case PLANE2_AOI0:
522 cmfbi = &data->mfb[4];
523 if (hw->desc[2] != ad->paddr) { /* AOI0 closed */
524 if (cmfbi->count > 0) /* AOI1 open */
525 ad->next_ad =
526 cpu_to_le32(cmfbi->ad->paddr);
527 else
528 ad->next_ad = 0;
529 wr_reg_wa(&hw->desc[2], ad->paddr);
530 }
531 break;
532 case PLANE1_AOI1:
533 pmfbi = &data->mfb[1];
534 ad->next_ad = 0;
535 if (hw->desc[1] == data->dummy_ad.paddr)
536 wr_reg_wa(&hw->desc[1], ad->paddr);
537 else /* AOI0 open */
538 pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
539 break;
540 case PLANE2_AOI1:
541 pmfbi = &data->mfb[3];
542 ad->next_ad = 0;
543 if (hw->desc[2] == data->dummy_ad.paddr)
544 wr_reg_wa(&hw->desc[2], ad->paddr);
545 else /* AOI0 was open */
546 pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
547 break;
548 }
549 }
550
551 static void fsl_diu_disable_panel(struct fb_info *info)
552 {
553 struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
554 struct diu_ad *ad = mfbi->ad;
555 struct fsl_diu_data *data = mfbi->parent;
556 struct diu __iomem *hw = data->diu_reg;
557
558 switch (mfbi->index) {
559 case PLANE0:
560 wr_reg_wa(&hw->desc[0], 0);
561 break;
562 case PLANE1_AOI0:
563 cmfbi = &data->mfb[2];
564 if (cmfbi->count > 0) /* AOI1 is open */
565 wr_reg_wa(&hw->desc[1], cmfbi->ad->paddr);
566 /* move AOI1 to the first */
567 else /* AOI1 was closed */
568 wr_reg_wa(&hw->desc[1], data->dummy_ad.paddr);
569 /* close AOI 0 */
570 break;
571 case PLANE2_AOI0:
572 cmfbi = &data->mfb[4];
573 if (cmfbi->count > 0) /* AOI1 is open */
574 wr_reg_wa(&hw->desc[2], cmfbi->ad->paddr);
575 /* move AOI1 to the first */
576 else /* AOI1 was closed */
577 wr_reg_wa(&hw->desc[2], data->dummy_ad.paddr);
578 /* close AOI 0 */
579 break;
580 case PLANE1_AOI1:
581 pmfbi = &data->mfb[1];
582 if (hw->desc[1] != ad->paddr) {
583 /* AOI1 is not the first in the chain */
584 if (pmfbi->count > 0)
585 /* AOI0 is open, must be the first */
586 pmfbi->ad->next_ad = 0;
587 } else /* AOI1 is the first in the chain */
588 wr_reg_wa(&hw->desc[1], data->dummy_ad.paddr);
589 /* close AOI 1 */
590 break;
591 case PLANE2_AOI1:
592 pmfbi = &data->mfb[3];
593 if (hw->desc[2] != ad->paddr) {
594 /* AOI1 is not the first in the chain */
595 if (pmfbi->count > 0)
596 /* AOI0 is open, must be the first */
597 pmfbi->ad->next_ad = 0;
598 } else /* AOI1 is the first in the chain */
599 wr_reg_wa(&hw->desc[2], data->dummy_ad.paddr);
600 /* close AOI 1 */
601 break;
602 }
603 }
604
605 static void enable_lcdc(struct fb_info *info)
606 {
607 struct mfb_info *mfbi = info->par;
608 struct fsl_diu_data *data = mfbi->parent;
609 struct diu __iomem *hw = data->diu_reg;
610
611 out_be32(&hw->diu_mode, MFB_MODE1);
612 }
613
614 static void disable_lcdc(struct fb_info *info)
615 {
616 struct mfb_info *mfbi = info->par;
617 struct fsl_diu_data *data = mfbi->parent;
618 struct diu __iomem *hw = data->diu_reg;
619
620 out_be32(&hw->diu_mode, 0);
621 }
622
623 static void adjust_aoi_size_position(struct fb_var_screeninfo *var,
624 struct fb_info *info)
625 {
626 struct mfb_info *lower_aoi_mfbi, *upper_aoi_mfbi, *mfbi = info->par;
627 struct fsl_diu_data *data = mfbi->parent;
628 int available_height, upper_aoi_bottom;
629 enum mfb_index index = mfbi->index;
630 int lower_aoi_is_open, upper_aoi_is_open;
631 __u32 base_plane_width, base_plane_height, upper_aoi_height;
632
633 base_plane_width = data->fsl_diu_info[0].var.xres;
634 base_plane_height = data->fsl_diu_info[0].var.yres;
635
636 if (mfbi->x_aoi_d < 0)
637 mfbi->x_aoi_d = 0;
638 if (mfbi->y_aoi_d < 0)
639 mfbi->y_aoi_d = 0;
640 switch (index) {
641 case PLANE0:
642 if (mfbi->x_aoi_d != 0)
643 mfbi->x_aoi_d = 0;
644 if (mfbi->y_aoi_d != 0)
645 mfbi->y_aoi_d = 0;
646 break;
647 case PLANE1_AOI0:
648 case PLANE2_AOI0:
649 lower_aoi_mfbi = data->fsl_diu_info[index+1].par;
650 lower_aoi_is_open = lower_aoi_mfbi->count > 0 ? 1 : 0;
651 if (var->xres > base_plane_width)
652 var->xres = base_plane_width;
653 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
654 mfbi->x_aoi_d = base_plane_width - var->xres;
655
656 if (lower_aoi_is_open)
657 available_height = lower_aoi_mfbi->y_aoi_d;
658 else
659 available_height = base_plane_height;
660 if (var->yres > available_height)
661 var->yres = available_height;
662 if ((mfbi->y_aoi_d + var->yres) > available_height)
663 mfbi->y_aoi_d = available_height - var->yres;
664 break;
665 case PLANE1_AOI1:
666 case PLANE2_AOI1:
667 upper_aoi_mfbi = data->fsl_diu_info[index-1].par;
668 upper_aoi_height = data->fsl_diu_info[index-1].var.yres;
669 upper_aoi_bottom = upper_aoi_mfbi->y_aoi_d + upper_aoi_height;
670 upper_aoi_is_open = upper_aoi_mfbi->count > 0 ? 1 : 0;
671 if (var->xres > base_plane_width)
672 var->xres = base_plane_width;
673 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
674 mfbi->x_aoi_d = base_plane_width - var->xres;
675 if (mfbi->y_aoi_d < 0)
676 mfbi->y_aoi_d = 0;
677 if (upper_aoi_is_open) {
678 if (mfbi->y_aoi_d < upper_aoi_bottom)
679 mfbi->y_aoi_d = upper_aoi_bottom;
680 available_height = base_plane_height
681 - upper_aoi_bottom;
682 } else
683 available_height = base_plane_height;
684 if (var->yres > available_height)
685 var->yres = available_height;
686 if ((mfbi->y_aoi_d + var->yres) > base_plane_height)
687 mfbi->y_aoi_d = base_plane_height - var->yres;
688 break;
689 }
690 }
691 /*
692 * Checks to see if the hardware supports the state requested by var passed
693 * in. This function does not alter the hardware state! If the var passed in
694 * is slightly off by what the hardware can support then we alter the var
695 * PASSED in to what we can do. If the hardware doesn't support mode change
696 * a -EINVAL will be returned by the upper layers.
697 */
698 static int fsl_diu_check_var(struct fb_var_screeninfo *var,
699 struct fb_info *info)
700 {
701 if (var->xres_virtual < var->xres)
702 var->xres_virtual = var->xres;
703 if (var->yres_virtual < var->yres)
704 var->yres_virtual = var->yres;
705
706 if (var->xoffset < 0)
707 var->xoffset = 0;
708
709 if (var->yoffset < 0)
710 var->yoffset = 0;
711
712 if (var->xoffset + info->var.xres > info->var.xres_virtual)
713 var->xoffset = info->var.xres_virtual - info->var.xres;
714
715 if (var->yoffset + info->var.yres > info->var.yres_virtual)
716 var->yoffset = info->var.yres_virtual - info->var.yres;
717
718 if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
719 (var->bits_per_pixel != 16))
720 var->bits_per_pixel = default_bpp;
721
722 switch (var->bits_per_pixel) {
723 case 16:
724 var->red.length = 5;
725 var->red.offset = 11;
726 var->red.msb_right = 0;
727
728 var->green.length = 6;
729 var->green.offset = 5;
730 var->green.msb_right = 0;
731
732 var->blue.length = 5;
733 var->blue.offset = 0;
734 var->blue.msb_right = 0;
735
736 var->transp.length = 0;
737 var->transp.offset = 0;
738 var->transp.msb_right = 0;
739 break;
740 case 24:
741 var->red.length = 8;
742 var->red.offset = 0;
743 var->red.msb_right = 0;
744
745 var->green.length = 8;
746 var->green.offset = 8;
747 var->green.msb_right = 0;
748
749 var->blue.length = 8;
750 var->blue.offset = 16;
751 var->blue.msb_right = 0;
752
753 var->transp.length = 0;
754 var->transp.offset = 0;
755 var->transp.msb_right = 0;
756 break;
757 case 32:
758 var->red.length = 8;
759 var->red.offset = 16;
760 var->red.msb_right = 0;
761
762 var->green.length = 8;
763 var->green.offset = 8;
764 var->green.msb_right = 0;
765
766 var->blue.length = 8;
767 var->blue.offset = 0;
768 var->blue.msb_right = 0;
769
770 var->transp.length = 8;
771 var->transp.offset = 24;
772 var->transp.msb_right = 0;
773
774 break;
775 }
776
777 var->height = -1;
778 var->width = -1;
779 var->grayscale = 0;
780
781 /* Copy nonstd field to/from sync for fbset usage */
782 var->sync |= var->nonstd;
783 var->nonstd |= var->sync;
784
785 adjust_aoi_size_position(var, info);
786 return 0;
787 }
788
789 static void set_fix(struct fb_info *info)
790 {
791 struct fb_fix_screeninfo *fix = &info->fix;
792 struct fb_var_screeninfo *var = &info->var;
793 struct mfb_info *mfbi = info->par;
794
795 strncpy(fix->id, mfbi->id, sizeof(fix->id));
796 fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
797 fix->type = FB_TYPE_PACKED_PIXELS;
798 fix->accel = FB_ACCEL_NONE;
799 fix->visual = FB_VISUAL_TRUECOLOR;
800 fix->xpanstep = 1;
801 fix->ypanstep = 1;
802 }
803
804 static void update_lcdc(struct fb_info *info)
805 {
806 struct fb_var_screeninfo *var = &info->var;
807 struct mfb_info *mfbi = info->par;
808 struct fsl_diu_data *data = mfbi->parent;
809 struct diu __iomem *hw;
810 int i, j;
811 u8 *gamma_table_base;
812
813 u32 temp;
814
815 hw = data->diu_reg;
816
817 if (diu_ops.set_monitor_port)
818 diu_ops.set_monitor_port(data->monitor_port);
819 gamma_table_base = data->gamma;
820
821 /* Prep for DIU init - gamma table, cursor table */
822
823 for (i = 0; i <= 2; i++)
824 for (j = 0; j <= 255; j++)
825 *gamma_table_base++ = j;
826
827 if (diu_ops.set_gamma_table)
828 diu_ops.set_gamma_table(data->monitor_port, data->gamma);
829
830 disable_lcdc(info);
831
832 /* Program DIU registers */
833
834 out_be32(&hw->gamma, DMA_ADDR(data, gamma));
835
836 out_be32(&hw->bgnd, 0x007F7F7F); /* Set background to grey */
837 out_be32(&hw->disp_size, (var->yres << 16) | var->xres);
838
839 /* Horizontal and vertical configuration register */
840 temp = var->left_margin << 22 | /* BP_H */
841 var->hsync_len << 11 | /* PW_H */
842 var->right_margin; /* FP_H */
843
844 out_be32(&hw->hsyn_para, temp);
845
846 temp = var->upper_margin << 22 | /* BP_V */
847 var->vsync_len << 11 | /* PW_V */
848 var->lower_margin; /* FP_V */
849
850 out_be32(&hw->vsyn_para, temp);
851
852 diu_ops.set_pixel_clock(var->pixclock);
853
854 #ifndef CONFIG_PPC_MPC512x
855 /*
856 * The PLUT register is defined differently on the MPC5121 than it
857 * is on other SOCs. Unfortunately, there's no documentation that
858 * explains how it's supposed to be programmed, so for now, we leave
859 * it at the default value on the MPC5121.
860 *
861 * For other SOCs, program it for the highest priority, which will
862 * reduce the chance of underrun. Technically, we should scale the
863 * priority to match the screen resolution, but doing that properly
864 * requires delicate fine-tuning for each use-case.
865 */
866 out_be32(&hw->plut, 0x01F5F666);
867 #endif
868
869 /* Enable the DIU */
870 enable_lcdc(info);
871 }
872
873 static int map_video_memory(struct fb_info *info)
874 {
875 u32 smem_len = info->fix.line_length * info->var.yres_virtual;
876 void *p;
877
878 p = alloc_pages_exact(smem_len, GFP_DMA | __GFP_ZERO);
879 if (!p) {
880 dev_err(info->dev, "unable to allocate fb memory\n");
881 return -ENOMEM;
882 }
883 mutex_lock(&info->mm_lock);
884 info->screen_base = p;
885 info->fix.smem_start = virt_to_phys(info->screen_base);
886 info->fix.smem_len = smem_len;
887 mutex_unlock(&info->mm_lock);
888 info->screen_size = info->fix.smem_len;
889
890 return 0;
891 }
892
893 static void unmap_video_memory(struct fb_info *info)
894 {
895 void *p = info->screen_base;
896 size_t l = info->fix.smem_len;
897
898 mutex_lock(&info->mm_lock);
899 info->screen_base = NULL;
900 info->fix.smem_start = 0;
901 info->fix.smem_len = 0;
902 mutex_unlock(&info->mm_lock);
903
904 if (p)
905 free_pages_exact(p, l);
906 }
907
908 /*
909 * Using the fb_var_screeninfo in fb_info we set the aoi of this
910 * particular framebuffer. It is a light version of fsl_diu_set_par.
911 */
912 static int fsl_diu_set_aoi(struct fb_info *info)
913 {
914 struct fb_var_screeninfo *var = &info->var;
915 struct mfb_info *mfbi = info->par;
916 struct diu_ad *ad = mfbi->ad;
917
918 /* AOI should not be greater than display size */
919 ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
920 ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
921 return 0;
922 }
923
924 /**
925 * fsl_diu_get_pixel_format: return the pixel format for a given color depth
926 *
927 * The pixel format is a 32-bit value that determine which bits in each
928 * pixel are to be used for each color. This is the default function used
929 * if the platform does not define its own version.
930 */
931 static u32 fsl_diu_get_pixel_format(unsigned int bits_per_pixel)
932 {
933 #define PF_BYTE_F 0x10000000
934 #define PF_ALPHA_C_MASK 0x0E000000
935 #define PF_ALPHA_C_SHIFT 25
936 #define PF_BLUE_C_MASK 0x01800000
937 #define PF_BLUE_C_SHIFT 23
938 #define PF_GREEN_C_MASK 0x00600000
939 #define PF_GREEN_C_SHIFT 21
940 #define PF_RED_C_MASK 0x00180000
941 #define PF_RED_C_SHIFT 19
942 #define PF_PALETTE 0x00040000
943 #define PF_PIXEL_S_MASK 0x00030000
944 #define PF_PIXEL_S_SHIFT 16
945 #define PF_COMP_3_MASK 0x0000F000
946 #define PF_COMP_3_SHIFT 12
947 #define PF_COMP_2_MASK 0x00000F00
948 #define PF_COMP_2_SHIFT 8
949 #define PF_COMP_1_MASK 0x000000F0
950 #define PF_COMP_1_SHIFT 4
951 #define PF_COMP_0_MASK 0x0000000F
952 #define PF_COMP_0_SHIFT 0
953
954 #define MAKE_PF(alpha, red, green, blue, size, c0, c1, c2, c3) \
955 cpu_to_le32(PF_BYTE_F | (alpha << PF_ALPHA_C_SHIFT) | \
956 (blue << PF_BLUE_C_SHIFT) | (green << PF_GREEN_C_SHIFT) | \
957 (red << PF_RED_C_SHIFT) | (c3 << PF_COMP_3_SHIFT) | \
958 (c2 << PF_COMP_2_SHIFT) | (c1 << PF_COMP_1_SHIFT) | \
959 (c0 << PF_COMP_0_SHIFT) | (size << PF_PIXEL_S_SHIFT))
960
961 switch (bits_per_pixel) {
962 case 32:
963 /* 0x88883316 */
964 return MAKE_PF(3, 2, 1, 0, 3, 8, 8, 8, 8);
965 case 24:
966 /* 0x88082219 */
967 return MAKE_PF(4, 0, 1, 2, 2, 8, 8, 8, 0);
968 case 16:
969 /* 0x65053118 */
970 return MAKE_PF(4, 2, 1, 0, 1, 5, 6, 5, 0);
971 default:
972 pr_err("fsl-diu: unsupported color depth %u\n", bits_per_pixel);
973 return 0;
974 }
975 }
976
977 /*
978 * Copies a cursor image from user space to the proper place in driver
979 * memory so that the hardware can display the cursor image.
980 *
981 * Cursor data is represented as a sequence of 'width' bits packed into bytes.
982 * That is, the first 8 bits are in the first byte, the second 8 bits in the
983 * second byte, and so on. Therefore, the each row of the cursor is (width +
984 * 7) / 8 bytes of 'data'
985 *
986 * The DIU only supports cursors up to 32x32 (MAX_CURS). We reject cursors
987 * larger than this, so we already know that 'width' <= 32. Therefore, we can
988 * simplify our code by using a 32-bit big-endian integer ("line") to read in
989 * a single line of pixels, and only look at the top 'width' bits of that
990 * integer.
991 *
992 * This could result in an unaligned 32-bit read. For example, if the cursor
993 * is 24x24, then the first three bytes of 'image' contain the pixel data for
994 * the top line of the cursor. We do a 32-bit read of 'image', but we look
995 * only at the top 24 bits. Then we increment 'image' by 3 bytes. The next
996 * read is unaligned. The only problem is that we might read past the end of
997 * 'image' by 1-3 bytes, but that should not cause any problems.
998 */
999 static void fsl_diu_load_cursor_image(struct fb_info *info,
1000 const void *image, uint16_t bg, uint16_t fg,
1001 unsigned int width, unsigned int height)
1002 {
1003 struct mfb_info *mfbi = info->par;
1004 struct fsl_diu_data *data = mfbi->parent;
1005 __le16 *cursor = data->cursor;
1006 __le16 _fg = cpu_to_le16(fg);
1007 __le16 _bg = cpu_to_le16(bg);
1008 unsigned int h, w;
1009
1010 for (h = 0; h < height; h++) {
1011 uint32_t mask = 1 << 31;
1012 uint32_t line = be32_to_cpup(image);
1013
1014 for (w = 0; w < width; w++) {
1015 cursor[w] = (line & mask) ? _fg : _bg;
1016 mask >>= 1;
1017 }
1018
1019 cursor += MAX_CURS;
1020 image += DIV_ROUND_UP(width, 8);
1021 }
1022 }
1023
1024 /*
1025 * Set a hardware cursor. The image data for the cursor is passed via the
1026 * fb_cursor object.
1027 */
1028 static int fsl_diu_cursor(struct fb_info *info, struct fb_cursor *cursor)
1029 {
1030 struct mfb_info *mfbi = info->par;
1031 struct fsl_diu_data *data = mfbi->parent;
1032 struct diu __iomem *hw = data->diu_reg;
1033
1034 if (cursor->image.width > MAX_CURS || cursor->image.height > MAX_CURS)
1035 return -EINVAL;
1036
1037 /* The cursor size has changed */
1038 if (cursor->set & FB_CUR_SETSIZE) {
1039 /*
1040 * The DIU cursor is a fixed size, so when we get this
1041 * message, instead of resizing the cursor, we just clear
1042 * all the image data, in expectation of new data. However,
1043 * in tests this control does not appear to be normally
1044 * called.
1045 */
1046 memset(data->cursor, 0, sizeof(data->cursor));
1047 }
1048
1049 /* The cursor position has changed (cursor->image.dx|dy) */
1050 if (cursor->set & FB_CUR_SETPOS) {
1051 uint32_t xx, yy;
1052
1053 yy = (cursor->image.dy - info->var.yoffset) & 0x7ff;
1054 xx = (cursor->image.dx - info->var.xoffset) & 0x7ff;
1055
1056 out_be32(&hw->curs_pos, yy << 16 | xx);
1057 }
1058
1059 /*
1060 * FB_CUR_SETIMAGE - the cursor image has changed
1061 * FB_CUR_SETCMAP - the cursor colors has changed
1062 * FB_CUR_SETSHAPE - the cursor bitmask has changed
1063 */
1064 if (cursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETCMAP | FB_CUR_SETIMAGE)) {
1065 unsigned int image_size =
1066 DIV_ROUND_UP(cursor->image.width, 8) * cursor->image.height;
1067 unsigned int image_words =
1068 DIV_ROUND_UP(image_size, sizeof(uint32_t));
1069 unsigned int bg_idx = cursor->image.bg_color;
1070 unsigned int fg_idx = cursor->image.fg_color;
1071 uint8_t buffer[image_size];
1072 uint32_t *image, *source, *mask;
1073 uint16_t fg, bg;
1074 unsigned int i;
1075
1076 if (info->state != FBINFO_STATE_RUNNING)
1077 return 0;
1078
1079 /*
1080 * Determine the size of the cursor image data. Normally,
1081 * it's 8x16.
1082 */
1083 image_size = DIV_ROUND_UP(cursor->image.width, 8) *
1084 cursor->image.height;
1085
1086 bg = ((info->cmap.red[bg_idx] & 0xf8) << 7) |
1087 ((info->cmap.green[bg_idx] & 0xf8) << 2) |
1088 ((info->cmap.blue[bg_idx] & 0xf8) >> 3) |
1089 1 << 15;
1090
1091 fg = ((info->cmap.red[fg_idx] & 0xf8) << 7) |
1092 ((info->cmap.green[fg_idx] & 0xf8) << 2) |
1093 ((info->cmap.blue[fg_idx] & 0xf8) >> 3) |
1094 1 << 15;
1095
1096 /* Use 32-bit operations on the data to improve performance */
1097 image = (uint32_t *)buffer;
1098 source = (uint32_t *)cursor->image.data;
1099 mask = (uint32_t *)cursor->mask;
1100
1101 if (cursor->rop == ROP_XOR)
1102 for (i = 0; i < image_words; i++)
1103 image[i] = source[i] ^ mask[i];
1104 else
1105 for (i = 0; i < image_words; i++)
1106 image[i] = source[i] & mask[i];
1107
1108 fsl_diu_load_cursor_image(info, image, bg, fg,
1109 cursor->image.width, cursor->image.height);
1110 }
1111
1112 /*
1113 * Show or hide the cursor. The cursor data is always stored in the
1114 * 'cursor' memory block, and the actual cursor position is always in
1115 * the DIU's CURS_POS register. To hide the cursor, we redirect the
1116 * CURSOR register to a blank cursor. The show the cursor, we
1117 * redirect the CURSOR register to the real cursor data.
1118 */
1119 if (cursor->enable)
1120 out_be32(&hw->cursor, DMA_ADDR(data, cursor));
1121 else
1122 out_be32(&hw->cursor, DMA_ADDR(data, blank_cursor));
1123
1124 return 0;
1125 }
1126
1127 /*
1128 * Using the fb_var_screeninfo in fb_info we set the resolution of this
1129 * particular framebuffer. This function alters the fb_fix_screeninfo stored
1130 * in fb_info. It does not alter var in fb_info since we are using that
1131 * data. This means we depend on the data in var inside fb_info to be
1132 * supported by the hardware. fsl_diu_check_var is always called before
1133 * fsl_diu_set_par to ensure this.
1134 */
1135 static int fsl_diu_set_par(struct fb_info *info)
1136 {
1137 unsigned long len;
1138 struct fb_var_screeninfo *var = &info->var;
1139 struct mfb_info *mfbi = info->par;
1140 struct fsl_diu_data *data = mfbi->parent;
1141 struct diu_ad *ad = mfbi->ad;
1142 struct diu __iomem *hw;
1143
1144 hw = data->diu_reg;
1145
1146 set_fix(info);
1147
1148 len = info->var.yres_virtual * info->fix.line_length;
1149 /* Alloc & dealloc each time resolution/bpp change */
1150 if (len != info->fix.smem_len) {
1151 if (info->fix.smem_start)
1152 unmap_video_memory(info);
1153
1154 /* Memory allocation for framebuffer */
1155 if (map_video_memory(info)) {
1156 dev_err(info->dev, "unable to allocate fb memory 1\n");
1157 return -ENOMEM;
1158 }
1159 }
1160
1161 if (diu_ops.get_pixel_format)
1162 ad->pix_fmt = diu_ops.get_pixel_format(data->monitor_port,
1163 var->bits_per_pixel);
1164 else
1165 ad->pix_fmt = fsl_diu_get_pixel_format(var->bits_per_pixel);
1166
1167 ad->addr = cpu_to_le32(info->fix.smem_start);
1168 ad->src_size_g_alpha = cpu_to_le32((var->yres_virtual << 12) |
1169 var->xres_virtual) | mfbi->g_alpha;
1170 /* AOI should not be greater than display size */
1171 ad->aoi_size = cpu_to_le32((var->yres << 16) | var->xres);
1172 ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
1173 ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
1174
1175 /* Disable chroma keying function */
1176 ad->ckmax_r = 0;
1177 ad->ckmax_g = 0;
1178 ad->ckmax_b = 0;
1179
1180 ad->ckmin_r = 255;
1181 ad->ckmin_g = 255;
1182 ad->ckmin_b = 255;
1183
1184 if (mfbi->index == PLANE0)
1185 update_lcdc(info);
1186 return 0;
1187 }
1188
1189 static inline __u32 CNVT_TOHW(__u32 val, __u32 width)
1190 {
1191 return ((val << width) + 0x7FFF - val) >> 16;
1192 }
1193
1194 /*
1195 * Set a single color register. The values supplied have a 16 bit magnitude
1196 * which needs to be scaled in this function for the hardware. Things to take
1197 * into consideration are how many color registers, if any, are supported with
1198 * the current color visual. With truecolor mode no color palettes are
1199 * supported. Here a pseudo palette is created which we store the value in
1200 * pseudo_palette in struct fb_info. For pseudocolor mode we have a limited
1201 * color palette.
1202 */
1203 static int fsl_diu_setcolreg(unsigned int regno, unsigned int red,
1204 unsigned int green, unsigned int blue,
1205 unsigned int transp, struct fb_info *info)
1206 {
1207 int ret = 1;
1208
1209 /*
1210 * If greyscale is true, then we convert the RGB value
1211 * to greyscale no matter what visual we are using.
1212 */
1213 if (info->var.grayscale)
1214 red = green = blue = (19595 * red + 38470 * green +
1215 7471 * blue) >> 16;
1216 switch (info->fix.visual) {
1217 case FB_VISUAL_TRUECOLOR:
1218 /*
1219 * 16-bit True Colour. We encode the RGB value
1220 * according to the RGB bitfield information.
1221 */
1222 if (regno < 16) {
1223 u32 *pal = info->pseudo_palette;
1224 u32 v;
1225
1226 red = CNVT_TOHW(red, info->var.red.length);
1227 green = CNVT_TOHW(green, info->var.green.length);
1228 blue = CNVT_TOHW(blue, info->var.blue.length);
1229 transp = CNVT_TOHW(transp, info->var.transp.length);
1230
1231 v = (red << info->var.red.offset) |
1232 (green << info->var.green.offset) |
1233 (blue << info->var.blue.offset) |
1234 (transp << info->var.transp.offset);
1235
1236 pal[regno] = v;
1237 ret = 0;
1238 }
1239 break;
1240 }
1241
1242 return ret;
1243 }
1244
1245 /*
1246 * Pan (or wrap, depending on the `vmode' field) the display using the
1247 * 'xoffset' and 'yoffset' fields of the 'var' structure. If the values
1248 * don't fit, return -EINVAL.
1249 */
1250 static int fsl_diu_pan_display(struct fb_var_screeninfo *var,
1251 struct fb_info *info)
1252 {
1253 if ((info->var.xoffset == var->xoffset) &&
1254 (info->var.yoffset == var->yoffset))
1255 return 0; /* No change, do nothing */
1256
1257 if (var->xoffset < 0 || var->yoffset < 0
1258 || var->xoffset + info->var.xres > info->var.xres_virtual
1259 || var->yoffset + info->var.yres > info->var.yres_virtual)
1260 return -EINVAL;
1261
1262 info->var.xoffset = var->xoffset;
1263 info->var.yoffset = var->yoffset;
1264
1265 if (var->vmode & FB_VMODE_YWRAP)
1266 info->var.vmode |= FB_VMODE_YWRAP;
1267 else
1268 info->var.vmode &= ~FB_VMODE_YWRAP;
1269
1270 fsl_diu_set_aoi(info);
1271
1272 return 0;
1273 }
1274
1275 static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
1276 unsigned long arg)
1277 {
1278 struct mfb_info *mfbi = info->par;
1279 struct diu_ad *ad = mfbi->ad;
1280 struct mfb_chroma_key ck;
1281 unsigned char global_alpha;
1282 struct aoi_display_offset aoi_d;
1283 __u32 pix_fmt;
1284 void __user *buf = (void __user *)arg;
1285
1286 if (!arg)
1287 return -EINVAL;
1288
1289 dev_dbg(info->dev, "ioctl %08x (dir=%s%s type=%u nr=%u size=%u)\n", cmd,
1290 _IOC_DIR(cmd) & _IOC_READ ? "R" : "",
1291 _IOC_DIR(cmd) & _IOC_WRITE ? "W" : "",
1292 _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
1293
1294 switch (cmd) {
1295 case MFB_SET_PIXFMT_OLD:
1296 dev_warn(info->dev,
1297 "MFB_SET_PIXFMT value of 0x%08x is deprecated.\n",
1298 MFB_SET_PIXFMT_OLD);
1299 case MFB_SET_PIXFMT:
1300 if (copy_from_user(&pix_fmt, buf, sizeof(pix_fmt)))
1301 return -EFAULT;
1302 ad->pix_fmt = pix_fmt;
1303 break;
1304 case MFB_GET_PIXFMT_OLD:
1305 dev_warn(info->dev,
1306 "MFB_GET_PIXFMT value of 0x%08x is deprecated.\n",
1307 MFB_GET_PIXFMT_OLD);
1308 case MFB_GET_PIXFMT:
1309 pix_fmt = ad->pix_fmt;
1310 if (copy_to_user(buf, &pix_fmt, sizeof(pix_fmt)))
1311 return -EFAULT;
1312 break;
1313 case MFB_SET_AOID:
1314 if (copy_from_user(&aoi_d, buf, sizeof(aoi_d)))
1315 return -EFAULT;
1316 mfbi->x_aoi_d = aoi_d.x_aoi_d;
1317 mfbi->y_aoi_d = aoi_d.y_aoi_d;
1318 fsl_diu_check_var(&info->var, info);
1319 fsl_diu_set_aoi(info);
1320 break;
1321 case MFB_GET_AOID:
1322 aoi_d.x_aoi_d = mfbi->x_aoi_d;
1323 aoi_d.y_aoi_d = mfbi->y_aoi_d;
1324 if (copy_to_user(buf, &aoi_d, sizeof(aoi_d)))
1325 return -EFAULT;
1326 break;
1327 case MFB_GET_ALPHA:
1328 global_alpha = mfbi->g_alpha;
1329 if (copy_to_user(buf, &global_alpha, sizeof(global_alpha)))
1330 return -EFAULT;
1331 break;
1332 case MFB_SET_ALPHA:
1333 /* set panel information */
1334 if (copy_from_user(&global_alpha, buf, sizeof(global_alpha)))
1335 return -EFAULT;
1336 ad->src_size_g_alpha = (ad->src_size_g_alpha & (~0xff)) |
1337 (global_alpha & 0xff);
1338 mfbi->g_alpha = global_alpha;
1339 break;
1340 case MFB_SET_CHROMA_KEY:
1341 /* set panel winformation */
1342 if (copy_from_user(&ck, buf, sizeof(ck)))
1343 return -EFAULT;
1344
1345 if (ck.enable &&
1346 (ck.red_max < ck.red_min ||
1347 ck.green_max < ck.green_min ||
1348 ck.blue_max < ck.blue_min))
1349 return -EINVAL;
1350
1351 if (!ck.enable) {
1352 ad->ckmax_r = 0;
1353 ad->ckmax_g = 0;
1354 ad->ckmax_b = 0;
1355 ad->ckmin_r = 255;
1356 ad->ckmin_g = 255;
1357 ad->ckmin_b = 255;
1358 } else {
1359 ad->ckmax_r = ck.red_max;
1360 ad->ckmax_g = ck.green_max;
1361 ad->ckmax_b = ck.blue_max;
1362 ad->ckmin_r = ck.red_min;
1363 ad->ckmin_g = ck.green_min;
1364 ad->ckmin_b = ck.blue_min;
1365 }
1366 break;
1367 #ifdef CONFIG_PPC_MPC512x
1368 case MFB_SET_GAMMA: {
1369 struct fsl_diu_data *data = mfbi->parent;
1370
1371 if (copy_from_user(data->gamma, buf, sizeof(data->gamma)))
1372 return -EFAULT;
1373 setbits32(&data->diu_reg->gamma, 0); /* Force table reload */
1374 break;
1375 }
1376 case MFB_GET_GAMMA: {
1377 struct fsl_diu_data *data = mfbi->parent;
1378
1379 if (copy_to_user(buf, data->gamma, sizeof(data->gamma)))
1380 return -EFAULT;
1381 break;
1382 }
1383 #endif
1384 default:
1385 dev_err(info->dev, "unknown ioctl command (0x%08X)\n", cmd);
1386 return -ENOIOCTLCMD;
1387 }
1388
1389 return 0;
1390 }
1391
1392 static inline void fsl_diu_enable_interrupts(struct fsl_diu_data *data)
1393 {
1394 u32 int_mask = INT_UNDRUN; /* enable underrun detection */
1395
1396 if (IS_ENABLED(CONFIG_NOT_COHERENT_CACHE))
1397 int_mask |= INT_VSYNC; /* enable vertical sync */
1398
1399 clrbits32(&data->diu_reg->int_mask, int_mask);
1400 }
1401
1402 /* turn on fb if count == 1
1403 */
1404 static int fsl_diu_open(struct fb_info *info, int user)
1405 {
1406 struct mfb_info *mfbi = info->par;
1407 int res = 0;
1408
1409 /* free boot splash memory on first /dev/fb0 open */
1410 if ((mfbi->index == PLANE0) && diu_ops.release_bootmem)
1411 diu_ops.release_bootmem();
1412
1413 spin_lock(&diu_lock);
1414 mfbi->count++;
1415 if (mfbi->count == 1) {
1416 fsl_diu_check_var(&info->var, info);
1417 res = fsl_diu_set_par(info);
1418 if (res < 0)
1419 mfbi->count--;
1420 else {
1421 fsl_diu_enable_interrupts(mfbi->parent);
1422 fsl_diu_enable_panel(info);
1423 }
1424 }
1425
1426 spin_unlock(&diu_lock);
1427 return res;
1428 }
1429
1430 /* turn off fb if count == 0
1431 */
1432 static int fsl_diu_release(struct fb_info *info, int user)
1433 {
1434 struct mfb_info *mfbi = info->par;
1435 int res = 0;
1436
1437 spin_lock(&diu_lock);
1438 mfbi->count--;
1439 if (mfbi->count == 0) {
1440 struct fsl_diu_data *data = mfbi->parent;
1441 bool disable = true;
1442 int i;
1443
1444 /* Disable interrupts only if all AOIs are closed */
1445 for (i = 0; i < NUM_AOIS; i++) {
1446 struct mfb_info *mi = data->fsl_diu_info[i].par;
1447
1448 if (mi->count)
1449 disable = false;
1450 }
1451 if (disable)
1452 out_be32(&data->diu_reg->int_mask, 0xffffffff);
1453 fsl_diu_disable_panel(info);
1454 }
1455
1456 spin_unlock(&diu_lock);
1457 return res;
1458 }
1459
1460 static struct fb_ops fsl_diu_ops = {
1461 .owner = THIS_MODULE,
1462 .fb_check_var = fsl_diu_check_var,
1463 .fb_set_par = fsl_diu_set_par,
1464 .fb_setcolreg = fsl_diu_setcolreg,
1465 .fb_pan_display = fsl_diu_pan_display,
1466 .fb_fillrect = cfb_fillrect,
1467 .fb_copyarea = cfb_copyarea,
1468 .fb_imageblit = cfb_imageblit,
1469 .fb_ioctl = fsl_diu_ioctl,
1470 .fb_open = fsl_diu_open,
1471 .fb_release = fsl_diu_release,
1472 .fb_cursor = fsl_diu_cursor,
1473 };
1474
1475 static int install_fb(struct fb_info *info)
1476 {
1477 int rc;
1478 struct mfb_info *mfbi = info->par;
1479 struct fsl_diu_data *data = mfbi->parent;
1480 const char *aoi_mode, *init_aoi_mode = "320x240";
1481 struct fb_videomode *db = fsl_diu_mode_db;
1482 unsigned int dbsize = ARRAY_SIZE(fsl_diu_mode_db);
1483 int has_default_mode = 1;
1484
1485 info->var.activate = FB_ACTIVATE_NOW;
1486 info->fbops = &fsl_diu_ops;
1487 info->flags = FBINFO_DEFAULT | FBINFO_VIRTFB | FBINFO_PARTIAL_PAN_OK |
1488 FBINFO_READS_FAST;
1489 info->pseudo_palette = mfbi->pseudo_palette;
1490
1491 rc = fb_alloc_cmap(&info->cmap, 16, 0);
1492 if (rc)
1493 return rc;
1494
1495 if (mfbi->index == PLANE0) {
1496 if (data->has_edid) {
1497 /* Now build modedb from EDID */
1498 fb_edid_to_monspecs(data->edid_data, &info->monspecs);
1499 fb_videomode_to_modelist(info->monspecs.modedb,
1500 info->monspecs.modedb_len,
1501 &info->modelist);
1502 db = info->monspecs.modedb;
1503 dbsize = info->monspecs.modedb_len;
1504 }
1505 aoi_mode = fb_mode;
1506 } else {
1507 aoi_mode = init_aoi_mode;
1508 }
1509 rc = fb_find_mode(&info->var, info, aoi_mode, db, dbsize, NULL,
1510 default_bpp);
1511 if (!rc) {
1512 /*
1513 * For plane 0 we continue and look into
1514 * driver's internal modedb.
1515 */
1516 if ((mfbi->index == PLANE0) && data->has_edid)
1517 has_default_mode = 0;
1518 else
1519 return -EINVAL;
1520 }
1521
1522 if (!has_default_mode) {
1523 rc = fb_find_mode(&info->var, info, aoi_mode, fsl_diu_mode_db,
1524 ARRAY_SIZE(fsl_diu_mode_db), NULL, default_bpp);
1525 if (rc)
1526 has_default_mode = 1;
1527 }
1528
1529 /* Still not found, use preferred mode from database if any */
1530 if (!has_default_mode && info->monspecs.modedb) {
1531 struct fb_monspecs *specs = &info->monspecs;
1532 struct fb_videomode *modedb = &specs->modedb[0];
1533
1534 /*
1535 * Get preferred timing. If not found,
1536 * first mode in database will be used.
1537 */
1538 if (specs->misc & FB_MISC_1ST_DETAIL) {
1539 int i;
1540
1541 for (i = 0; i < specs->modedb_len; i++) {
1542 if (specs->modedb[i].flag & FB_MODE_IS_FIRST) {
1543 modedb = &specs->modedb[i];
1544 break;
1545 }
1546 }
1547 }
1548
1549 info->var.bits_per_pixel = default_bpp;
1550 fb_videomode_to_var(&info->var, modedb);
1551 }
1552
1553 if (fsl_diu_check_var(&info->var, info)) {
1554 dev_err(info->dev, "fsl_diu_check_var failed\n");
1555 unmap_video_memory(info);
1556 fb_dealloc_cmap(&info->cmap);
1557 return -EINVAL;
1558 }
1559
1560 if (register_framebuffer(info) < 0) {
1561 dev_err(info->dev, "register_framebuffer failed\n");
1562 unmap_video_memory(info);
1563 fb_dealloc_cmap(&info->cmap);
1564 return -EINVAL;
1565 }
1566
1567 mfbi->registered = 1;
1568 dev_info(info->dev, "%s registered successfully\n", mfbi->id);
1569
1570 return 0;
1571 }
1572
1573 static void uninstall_fb(struct fb_info *info)
1574 {
1575 struct mfb_info *mfbi = info->par;
1576
1577 if (!mfbi->registered)
1578 return;
1579
1580 unregister_framebuffer(info);
1581 unmap_video_memory(info);
1582 if (&info->cmap)
1583 fb_dealloc_cmap(&info->cmap);
1584
1585 mfbi->registered = 0;
1586 }
1587
1588 static irqreturn_t fsl_diu_isr(int irq, void *dev_id)
1589 {
1590 struct diu __iomem *hw = dev_id;
1591 uint32_t status = in_be32(&hw->int_status);
1592
1593 if (status) {
1594 /* This is the workaround for underrun */
1595 if (status & INT_UNDRUN) {
1596 out_be32(&hw->diu_mode, 0);
1597 udelay(1);
1598 out_be32(&hw->diu_mode, 1);
1599 }
1600 #if defined(CONFIG_NOT_COHERENT_CACHE)
1601 else if (status & INT_VSYNC) {
1602 unsigned int i;
1603
1604 for (i = 0; i < coherence_data_size;
1605 i += d_cache_line_size)
1606 __asm__ __volatile__ (
1607 "dcbz 0, %[input]"
1608 ::[input]"r"(&coherence_data[i]));
1609 }
1610 #endif
1611 return IRQ_HANDLED;
1612 }
1613 return IRQ_NONE;
1614 }
1615
1616 #ifdef CONFIG_PM
1617 /*
1618 * Power management hooks. Note that we won't be called from IRQ context,
1619 * unlike the blank functions above, so we may sleep.
1620 */
1621 static int fsl_diu_suspend(struct platform_device *ofdev, pm_message_t state)
1622 {
1623 struct fsl_diu_data *data;
1624
1625 data = dev_get_drvdata(&ofdev->dev);
1626 disable_lcdc(data->fsl_diu_info);
1627
1628 return 0;
1629 }
1630
1631 static int fsl_diu_resume(struct platform_device *ofdev)
1632 {
1633 struct fsl_diu_data *data;
1634 unsigned int i;
1635
1636 data = dev_get_drvdata(&ofdev->dev);
1637
1638 fsl_diu_enable_interrupts(data);
1639 update_lcdc(data->fsl_diu_info);
1640 for (i = 0; i < NUM_AOIS; i++) {
1641 if (data->mfb[i].count)
1642 fsl_diu_enable_panel(&data->fsl_diu_info[i]);
1643 }
1644
1645 return 0;
1646 }
1647
1648 #else
1649 #define fsl_diu_suspend NULL
1650 #define fsl_diu_resume NULL
1651 #endif /* CONFIG_PM */
1652
1653 static ssize_t store_monitor(struct device *device,
1654 struct device_attribute *attr, const char *buf, size_t count)
1655 {
1656 enum fsl_diu_monitor_port old_monitor_port;
1657 struct fsl_diu_data *data =
1658 container_of(attr, struct fsl_diu_data, dev_attr);
1659
1660 old_monitor_port = data->monitor_port;
1661 data->monitor_port = fsl_diu_name_to_port(buf);
1662
1663 if (old_monitor_port != data->monitor_port) {
1664 /* All AOIs need adjust pixel format
1665 * fsl_diu_set_par only change the pixsel format here
1666 * unlikely to fail. */
1667 unsigned int i;
1668
1669 for (i=0; i < NUM_AOIS; i++)
1670 fsl_diu_set_par(&data->fsl_diu_info[i]);
1671 }
1672 return count;
1673 }
1674
1675 static ssize_t show_monitor(struct device *device,
1676 struct device_attribute *attr, char *buf)
1677 {
1678 struct fsl_diu_data *data =
1679 container_of(attr, struct fsl_diu_data, dev_attr);
1680
1681 switch (data->monitor_port) {
1682 case FSL_DIU_PORT_DVI:
1683 return sprintf(buf, "DVI\n");
1684 case FSL_DIU_PORT_LVDS:
1685 return sprintf(buf, "Single-link LVDS\n");
1686 case FSL_DIU_PORT_DLVDS:
1687 return sprintf(buf, "Dual-link LVDS\n");
1688 }
1689
1690 return 0;
1691 }
1692
1693 static int fsl_diu_probe(struct platform_device *pdev)
1694 {
1695 struct device_node *np = pdev->dev.of_node;
1696 struct mfb_info *mfbi;
1697 struct fsl_diu_data *data;
1698 dma_addr_t dma_addr; /* DMA addr of fsl_diu_data struct */
1699 const void *prop;
1700 unsigned int i;
1701 int ret;
1702
1703 data = dmam_alloc_coherent(&pdev->dev, sizeof(struct fsl_diu_data),
1704 &dma_addr, GFP_DMA | __GFP_ZERO);
1705 if (!data)
1706 return -ENOMEM;
1707 data->dma_addr = dma_addr;
1708
1709 /*
1710 * dma_alloc_coherent() uses a page allocator, so the address is
1711 * always page-aligned. We need the memory to be 32-byte aligned,
1712 * so that's good. However, if one day the allocator changes, we
1713 * need to catch that. It's not worth the effort to handle unaligned
1714 * alloctions now because it's highly unlikely to ever be a problem.
1715 */
1716 if ((unsigned long)data & 31) {
1717 dev_err(&pdev->dev, "misaligned allocation");
1718 ret = -ENOMEM;
1719 goto error;
1720 }
1721
1722 spin_lock_init(&data->reg_lock);
1723
1724 for (i = 0; i < NUM_AOIS; i++) {
1725 struct fb_info *info = &data->fsl_diu_info[i];
1726
1727 info->device = &pdev->dev;
1728 info->par = &data->mfb[i];
1729
1730 /*
1731 * We store the physical address of the AD in the reserved
1732 * 'paddr' field of the AD itself.
1733 */
1734 data->ad[i].paddr = DMA_ADDR(data, ad[i]);
1735
1736 info->fix.smem_start = 0;
1737
1738 /* Initialize the AOI data structure */
1739 mfbi = info->par;
1740 memcpy(mfbi, &mfb_template[i], sizeof(struct mfb_info));
1741 mfbi->parent = data;
1742 mfbi->ad = &data->ad[i];
1743 }
1744
1745 /* Get the EDID data from the device tree, if present */
1746 prop = of_get_property(np, "edid", &ret);
1747 if (prop && ret == EDID_LENGTH) {
1748 memcpy(data->edid_data, prop, EDID_LENGTH);
1749 data->has_edid = true;
1750 }
1751
1752 data->diu_reg = of_iomap(np, 0);
1753 if (!data->diu_reg) {
1754 dev_err(&pdev->dev, "cannot map DIU registers\n");
1755 ret = -EFAULT;
1756 goto error;
1757 }
1758
1759 /* Get the IRQ of the DIU */
1760 data->irq = irq_of_parse_and_map(np, 0);
1761
1762 if (!data->irq) {
1763 dev_err(&pdev->dev, "could not get DIU IRQ\n");
1764 ret = -EINVAL;
1765 goto error;
1766 }
1767 data->monitor_port = monitor_port;
1768
1769 /* Initialize the dummy Area Descriptor */
1770 data->dummy_ad.addr = cpu_to_le32(DMA_ADDR(data, dummy_aoi));
1771 data->dummy_ad.pix_fmt = 0x88882317;
1772 data->dummy_ad.src_size_g_alpha = cpu_to_le32((4 << 12) | 4);
1773 data->dummy_ad.aoi_size = cpu_to_le32((4 << 16) | 2);
1774 data->dummy_ad.offset_xyi = 0;
1775 data->dummy_ad.offset_xyd = 0;
1776 data->dummy_ad.next_ad = 0;
1777 data->dummy_ad.paddr = DMA_ADDR(data, dummy_ad);
1778
1779 /*
1780 * Let DIU continue to display splash screen if it was pre-initialized
1781 * by the bootloader; otherwise, clear the display.
1782 */
1783 if (in_be32(&data->diu_reg->diu_mode) == MFB_MODE0)
1784 out_be32(&data->diu_reg->desc[0], 0);
1785
1786 out_be32(&data->diu_reg->desc[1], data->dummy_ad.paddr);
1787 out_be32(&data->diu_reg->desc[2], data->dummy_ad.paddr);
1788
1789 /*
1790 * Older versions of U-Boot leave interrupts enabled, so disable
1791 * all of them and clear the status register.
1792 */
1793 out_be32(&data->diu_reg->int_mask, 0xffffffff);
1794 in_be32(&data->diu_reg->int_status);
1795
1796 ret = request_irq(data->irq, fsl_diu_isr, 0, "fsl-diu-fb",
1797 data->diu_reg);
1798 if (ret) {
1799 dev_err(&pdev->dev, "could not claim irq\n");
1800 goto error;
1801 }
1802
1803 for (i = 0; i < NUM_AOIS; i++) {
1804 ret = install_fb(&data->fsl_diu_info[i]);
1805 if (ret) {
1806 dev_err(&pdev->dev, "could not register fb %d\n", i);
1807 free_irq(data->irq, data->diu_reg);
1808 goto error;
1809 }
1810 }
1811
1812 sysfs_attr_init(&data->dev_attr.attr);
1813 data->dev_attr.attr.name = "monitor";
1814 data->dev_attr.attr.mode = S_IRUGO|S_IWUSR;
1815 data->dev_attr.show = show_monitor;
1816 data->dev_attr.store = store_monitor;
1817 ret = device_create_file(&pdev->dev, &data->dev_attr);
1818 if (ret) {
1819 dev_err(&pdev->dev, "could not create sysfs file %s\n",
1820 data->dev_attr.attr.name);
1821 }
1822
1823 dev_set_drvdata(&pdev->dev, data);
1824 return 0;
1825
1826 error:
1827 for (i = 0; i < NUM_AOIS; i++)
1828 uninstall_fb(&data->fsl_diu_info[i]);
1829
1830 iounmap(data->diu_reg);
1831
1832 return ret;
1833 }
1834
1835 static int fsl_diu_remove(struct platform_device *pdev)
1836 {
1837 struct fsl_diu_data *data;
1838 int i;
1839
1840 data = dev_get_drvdata(&pdev->dev);
1841 disable_lcdc(&data->fsl_diu_info[0]);
1842
1843 free_irq(data->irq, data->diu_reg);
1844
1845 for (i = 0; i < NUM_AOIS; i++)
1846 uninstall_fb(&data->fsl_diu_info[i]);
1847
1848 iounmap(data->diu_reg);
1849
1850 return 0;
1851 }
1852
1853 #ifndef MODULE
1854 static int __init fsl_diu_setup(char *options)
1855 {
1856 char *opt;
1857 unsigned long val;
1858
1859 if (!options || !*options)
1860 return 0;
1861
1862 while ((opt = strsep(&options, ",")) != NULL) {
1863 if (!*opt)
1864 continue;
1865 if (!strncmp(opt, "monitor=", 8)) {
1866 monitor_port = fsl_diu_name_to_port(opt + 8);
1867 } else if (!strncmp(opt, "bpp=", 4)) {
1868 if (!kstrtoul(opt + 4, 10, &val))
1869 default_bpp = val;
1870 } else
1871 fb_mode = opt;
1872 }
1873
1874 return 0;
1875 }
1876 #endif
1877
1878 static struct of_device_id fsl_diu_match[] = {
1879 #ifdef CONFIG_PPC_MPC512x
1880 {
1881 .compatible = "fsl,mpc5121-diu",
1882 },
1883 #endif
1884 {
1885 .compatible = "fsl,diu",
1886 },
1887 {}
1888 };
1889 MODULE_DEVICE_TABLE(of, fsl_diu_match);
1890
1891 static struct platform_driver fsl_diu_driver = {
1892 .driver = {
1893 .name = "fsl-diu-fb",
1894 .of_match_table = fsl_diu_match,
1895 },
1896 .probe = fsl_diu_probe,
1897 .remove = fsl_diu_remove,
1898 .suspend = fsl_diu_suspend,
1899 .resume = fsl_diu_resume,
1900 };
1901
1902 static int __init fsl_diu_init(void)
1903 {
1904 #ifdef CONFIG_NOT_COHERENT_CACHE
1905 struct device_node *np;
1906 const u32 *prop;
1907 #endif
1908 int ret;
1909 #ifndef MODULE
1910 char *option;
1911
1912 /*
1913 * For kernel boot options (in 'video=xxxfb:<options>' format)
1914 */
1915 if (fb_get_options("fslfb", &option))
1916 return -ENODEV;
1917 fsl_diu_setup(option);
1918 #else
1919 monitor_port = fsl_diu_name_to_port(monitor_string);
1920 #endif
1921
1922 /*
1923 * Must to verify set_pixel_clock. If not implement on platform,
1924 * then that means that there is no platform support for the DIU.
1925 */
1926 if (!diu_ops.set_pixel_clock)
1927 return -ENODEV;
1928
1929 pr_info("Freescale Display Interface Unit (DIU) framebuffer driver\n");
1930
1931 #ifdef CONFIG_NOT_COHERENT_CACHE
1932 np = of_find_node_by_type(NULL, "cpu");
1933 if (!np) {
1934 pr_err("fsl-diu-fb: can't find 'cpu' device node\n");
1935 return -ENODEV;
1936 }
1937
1938 prop = of_get_property(np, "d-cache-size", NULL);
1939 if (prop == NULL) {
1940 pr_err("fsl-diu-fb: missing 'd-cache-size' property' "
1941 "in 'cpu' node\n");
1942 of_node_put(np);
1943 return -ENODEV;
1944 }
1945
1946 /*
1947 * Freescale PLRU requires 13/8 times the cache size to do a proper
1948 * displacement flush
1949 */
1950 coherence_data_size = be32_to_cpup(prop) * 13;
1951 coherence_data_size /= 8;
1952
1953 pr_debug("fsl-diu-fb: coherence data size is %zu bytes\n",
1954 coherence_data_size);
1955
1956 prop = of_get_property(np, "d-cache-line-size", NULL);
1957 if (prop == NULL) {
1958 pr_err("fsl-diu-fb: missing 'd-cache-line-size' property' "
1959 "in 'cpu' node\n");
1960 of_node_put(np);
1961 return -ENODEV;
1962 }
1963 d_cache_line_size = be32_to_cpup(prop);
1964
1965 pr_debug("fsl-diu-fb: cache lines size is %u bytes\n",
1966 d_cache_line_size);
1967
1968 of_node_put(np);
1969 coherence_data = vmalloc(coherence_data_size);
1970 if (!coherence_data) {
1971 pr_err("fsl-diu-fb: could not allocate coherence data "
1972 "(size=%zu)\n", coherence_data_size);
1973 return -ENOMEM;
1974 }
1975
1976 #endif
1977
1978 ret = platform_driver_register(&fsl_diu_driver);
1979 if (ret) {
1980 pr_err("fsl-diu-fb: failed to register platform driver\n");
1981 #if defined(CONFIG_NOT_COHERENT_CACHE)
1982 vfree(coherence_data);
1983 #endif
1984 }
1985 return ret;
1986 }
1987
1988 static void __exit fsl_diu_exit(void)
1989 {
1990 platform_driver_unregister(&fsl_diu_driver);
1991 #if defined(CONFIG_NOT_COHERENT_CACHE)
1992 vfree(coherence_data);
1993 #endif
1994 }
1995
1996 module_init(fsl_diu_init);
1997 module_exit(fsl_diu_exit);
1998
1999 MODULE_AUTHOR("York Sun <yorksun@freescale.com>");
2000 MODULE_DESCRIPTION("Freescale DIU framebuffer driver");
2001 MODULE_LICENSE("GPL");
2002
2003 module_param_named(mode, fb_mode, charp, 0);
2004 MODULE_PARM_DESC(mode,
2005 "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
2006 module_param_named(bpp, default_bpp, ulong, 0);
2007 MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified in 'mode'");
2008 module_param_named(monitor, monitor_string, charp, 0);
2009 MODULE_PARM_DESC(monitor, "Specify the monitor port "
2010 "(\"dvi\", \"lvds\", or \"dlvds\") if supported by the platform");
2011
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