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 * @blank_cursor: blank cursor for hiding cursor
364 * @next_cursor: scratch space to build load cursor
365 * @edid_data: EDID information buffer
366 * @has_edid: whether or not the EDID buffer is valid
367 *
368 * This data structure must be allocated with 32-byte alignment, so that the
369 * internal fields can be aligned properly.
370 */
371 struct fsl_diu_data {
372 dma_addr_t dma_addr;
373 struct fb_info fsl_diu_info[NUM_AOIS];
374 struct mfb_info mfb[NUM_AOIS];
375 struct device_attribute dev_attr;
376 unsigned int irq;
377 enum fsl_diu_monitor_port monitor_port;
378 struct diu __iomem *diu_reg;
379 spinlock_t reg_lock;
380 u8 dummy_aoi[4 * 4 * 4];
381 struct diu_ad dummy_ad __aligned(8);
382 struct diu_ad ad[NUM_AOIS] __aligned(8);
383 u8 gamma[256 * 3] __aligned(32);
384 /* It's easier to parse the cursor data as little-endian */
385 __le16 cursor[MAX_CURS * MAX_CURS] __aligned(32);
386 /* Blank cursor data -- used to hide the cursor */
387 __le16 blank_cursor[MAX_CURS * MAX_CURS] __aligned(32);
388 /* Scratch cursor data -- used to build new cursor */
389 __le16 next_cursor[MAX_CURS * MAX_CURS] __aligned(32);
390 uint8_t edid_data[EDID_LENGTH];
391 bool has_edid;
392 } __aligned(32);
393
394 /* Determine the DMA address of a member of the fsl_diu_data structure */
395 #define DMA_ADDR(p, f) ((p)->dma_addr + offsetof(struct fsl_diu_data, f))
396
397 static const struct mfb_info mfb_template[] = {
398 {
399 .index = PLANE0,
400 .id = "Panel0",
401 .registered = 0,
402 .count = 0,
403 .x_aoi_d = 0,
404 .y_aoi_d = 0,
405 },
406 {
407 .index = PLANE1_AOI0,
408 .id = "Panel1 AOI0",
409 .registered = 0,
410 .g_alpha = 0xff,
411 .count = 0,
412 .x_aoi_d = 0,
413 .y_aoi_d = 0,
414 },
415 {
416 .index = PLANE1_AOI1,
417 .id = "Panel1 AOI1",
418 .registered = 0,
419 .g_alpha = 0xff,
420 .count = 0,
421 .x_aoi_d = 0,
422 .y_aoi_d = 480,
423 },
424 {
425 .index = PLANE2_AOI0,
426 .id = "Panel2 AOI0",
427 .registered = 0,
428 .g_alpha = 0xff,
429 .count = 0,
430 .x_aoi_d = 640,
431 .y_aoi_d = 0,
432 },
433 {
434 .index = PLANE2_AOI1,
435 .id = "Panel2 AOI1",
436 .registered = 0,
437 .g_alpha = 0xff,
438 .count = 0,
439 .x_aoi_d = 640,
440 .y_aoi_d = 480,
441 },
442 };
443
444 #ifdef DEBUG
fsl_diu_dump(struct diu __iomem * hw)445 static void __attribute__ ((unused)) fsl_diu_dump(struct diu __iomem *hw)
446 {
447 mb();
448 pr_debug("DIU: desc=%08x,%08x,%08x, gamma=%08x palette=%08x "
449 "cursor=%08x curs_pos=%08x diu_mode=%08x bgnd=%08x "
450 "disp_size=%08x hsyn_para=%08x vsyn_para=%08x syn_pol=%08x "
451 "thresholds=%08x int_mask=%08x plut=%08x\n",
452 hw->desc[0], hw->desc[1], hw->desc[2], hw->gamma,
453 hw->palette, hw->cursor, hw->curs_pos, hw->diu_mode,
454 hw->bgnd, hw->disp_size, hw->hsyn_para, hw->vsyn_para,
455 hw->syn_pol, hw->thresholds, hw->int_mask, hw->plut);
456 rmb();
457 }
458 #endif
459
460 /**
461 * fsl_diu_name_to_port - convert a port name to a monitor port enum
462 *
463 * Takes the name of a monitor port ("dvi", "lvds", or "dlvds") and returns
464 * the enum fsl_diu_monitor_port that corresponds to that string.
465 *
466 * For compatibility with older versions, a number ("0", "1", or "2") is also
467 * supported.
468 *
469 * If the string is unknown, DVI is assumed.
470 *
471 * If the particular port is not supported by the platform, another port
472 * (platform-specific) is chosen instead.
473 */
fsl_diu_name_to_port(const char * s)474 static enum fsl_diu_monitor_port fsl_diu_name_to_port(const char *s)
475 {
476 enum fsl_diu_monitor_port port = FSL_DIU_PORT_DVI;
477 unsigned long val;
478
479 if (s) {
480 if (!kstrtoul(s, 10, &val) && (val <= 2))
481 port = (enum fsl_diu_monitor_port) val;
482 else if (strncmp(s, "lvds", 4) == 0)
483 port = FSL_DIU_PORT_LVDS;
484 else if (strncmp(s, "dlvds", 5) == 0)
485 port = FSL_DIU_PORT_DLVDS;
486 }
487
488 if (diu_ops.valid_monitor_port)
489 port = diu_ops.valid_monitor_port(port);
490
491 return port;
492 }
493
494 /*
495 * Workaround for failed writing desc register of planes.
496 * Needed with MPC5121 DIU rev 2.0 silicon.
497 */
wr_reg_wa(u32 * reg,u32 val)498 void wr_reg_wa(u32 *reg, u32 val)
499 {
500 do {
501 out_be32(reg, val);
502 } while (in_be32(reg) != val);
503 }
504
fsl_diu_enable_panel(struct fb_info * info)505 static void fsl_diu_enable_panel(struct fb_info *info)
506 {
507 struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
508 struct diu_ad *ad = mfbi->ad;
509 struct fsl_diu_data *data = mfbi->parent;
510 struct diu __iomem *hw = data->diu_reg;
511
512 switch (mfbi->index) {
513 case PLANE0:
514 wr_reg_wa(&hw->desc[0], ad->paddr);
515 break;
516 case PLANE1_AOI0:
517 cmfbi = &data->mfb[2];
518 if (hw->desc[1] != ad->paddr) { /* AOI0 closed */
519 if (cmfbi->count > 0) /* AOI1 open */
520 ad->next_ad =
521 cpu_to_le32(cmfbi->ad->paddr);
522 else
523 ad->next_ad = 0;
524 wr_reg_wa(&hw->desc[1], ad->paddr);
525 }
526 break;
527 case PLANE2_AOI0:
528 cmfbi = &data->mfb[4];
529 if (hw->desc[2] != ad->paddr) { /* AOI0 closed */
530 if (cmfbi->count > 0) /* AOI1 open */
531 ad->next_ad =
532 cpu_to_le32(cmfbi->ad->paddr);
533 else
534 ad->next_ad = 0;
535 wr_reg_wa(&hw->desc[2], ad->paddr);
536 }
537 break;
538 case PLANE1_AOI1:
539 pmfbi = &data->mfb[1];
540 ad->next_ad = 0;
541 if (hw->desc[1] == data->dummy_ad.paddr)
542 wr_reg_wa(&hw->desc[1], ad->paddr);
543 else /* AOI0 open */
544 pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
545 break;
546 case PLANE2_AOI1:
547 pmfbi = &data->mfb[3];
548 ad->next_ad = 0;
549 if (hw->desc[2] == data->dummy_ad.paddr)
550 wr_reg_wa(&hw->desc[2], ad->paddr);
551 else /* AOI0 was open */
552 pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
553 break;
554 }
555 }
556
fsl_diu_disable_panel(struct fb_info * info)557 static void fsl_diu_disable_panel(struct fb_info *info)
558 {
559 struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
560 struct diu_ad *ad = mfbi->ad;
561 struct fsl_diu_data *data = mfbi->parent;
562 struct diu __iomem *hw = data->diu_reg;
563
564 switch (mfbi->index) {
565 case PLANE0:
566 wr_reg_wa(&hw->desc[0], 0);
567 break;
568 case PLANE1_AOI0:
569 cmfbi = &data->mfb[2];
570 if (cmfbi->count > 0) /* AOI1 is open */
571 wr_reg_wa(&hw->desc[1], cmfbi->ad->paddr);
572 /* move AOI1 to the first */
573 else /* AOI1 was closed */
574 wr_reg_wa(&hw->desc[1], data->dummy_ad.paddr);
575 /* close AOI 0 */
576 break;
577 case PLANE2_AOI0:
578 cmfbi = &data->mfb[4];
579 if (cmfbi->count > 0) /* AOI1 is open */
580 wr_reg_wa(&hw->desc[2], cmfbi->ad->paddr);
581 /* move AOI1 to the first */
582 else /* AOI1 was closed */
583 wr_reg_wa(&hw->desc[2], data->dummy_ad.paddr);
584 /* close AOI 0 */
585 break;
586 case PLANE1_AOI1:
587 pmfbi = &data->mfb[1];
588 if (hw->desc[1] != ad->paddr) {
589 /* AOI1 is not the first in the chain */
590 if (pmfbi->count > 0)
591 /* AOI0 is open, must be the first */
592 pmfbi->ad->next_ad = 0;
593 } else /* AOI1 is the first in the chain */
594 wr_reg_wa(&hw->desc[1], data->dummy_ad.paddr);
595 /* close AOI 1 */
596 break;
597 case PLANE2_AOI1:
598 pmfbi = &data->mfb[3];
599 if (hw->desc[2] != ad->paddr) {
600 /* AOI1 is not the first in the chain */
601 if (pmfbi->count > 0)
602 /* AOI0 is open, must be the first */
603 pmfbi->ad->next_ad = 0;
604 } else /* AOI1 is the first in the chain */
605 wr_reg_wa(&hw->desc[2], data->dummy_ad.paddr);
606 /* close AOI 1 */
607 break;
608 }
609 }
610
enable_lcdc(struct fb_info * info)611 static void enable_lcdc(struct fb_info *info)
612 {
613 struct mfb_info *mfbi = info->par;
614 struct fsl_diu_data *data = mfbi->parent;
615 struct diu __iomem *hw = data->diu_reg;
616
617 out_be32(&hw->diu_mode, MFB_MODE1);
618 }
619
disable_lcdc(struct fb_info * info)620 static void disable_lcdc(struct fb_info *info)
621 {
622 struct mfb_info *mfbi = info->par;
623 struct fsl_diu_data *data = mfbi->parent;
624 struct diu __iomem *hw = data->diu_reg;
625
626 out_be32(&hw->diu_mode, 0);
627 }
628
adjust_aoi_size_position(struct fb_var_screeninfo * var,struct fb_info * info)629 static void adjust_aoi_size_position(struct fb_var_screeninfo *var,
630 struct fb_info *info)
631 {
632 struct mfb_info *lower_aoi_mfbi, *upper_aoi_mfbi, *mfbi = info->par;
633 struct fsl_diu_data *data = mfbi->parent;
634 int available_height, upper_aoi_bottom;
635 enum mfb_index index = mfbi->index;
636 int lower_aoi_is_open, upper_aoi_is_open;
637 __u32 base_plane_width, base_plane_height, upper_aoi_height;
638
639 base_plane_width = data->fsl_diu_info[0].var.xres;
640 base_plane_height = data->fsl_diu_info[0].var.yres;
641
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 switch (index) {
647 case PLANE0:
648 if (mfbi->x_aoi_d != 0)
649 mfbi->x_aoi_d = 0;
650 if (mfbi->y_aoi_d != 0)
651 mfbi->y_aoi_d = 0;
652 break;
653 case PLANE1_AOI0:
654 case PLANE2_AOI0:
655 lower_aoi_mfbi = data->fsl_diu_info[index+1].par;
656 lower_aoi_is_open = lower_aoi_mfbi->count > 0 ? 1 : 0;
657 if (var->xres > base_plane_width)
658 var->xres = base_plane_width;
659 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
660 mfbi->x_aoi_d = base_plane_width - var->xres;
661
662 if (lower_aoi_is_open)
663 available_height = lower_aoi_mfbi->y_aoi_d;
664 else
665 available_height = base_plane_height;
666 if (var->yres > available_height)
667 var->yres = available_height;
668 if ((mfbi->y_aoi_d + var->yres) > available_height)
669 mfbi->y_aoi_d = available_height - var->yres;
670 break;
671 case PLANE1_AOI1:
672 case PLANE2_AOI1:
673 upper_aoi_mfbi = data->fsl_diu_info[index-1].par;
674 upper_aoi_height = data->fsl_diu_info[index-1].var.yres;
675 upper_aoi_bottom = upper_aoi_mfbi->y_aoi_d + upper_aoi_height;
676 upper_aoi_is_open = upper_aoi_mfbi->count > 0 ? 1 : 0;
677 if (var->xres > base_plane_width)
678 var->xres = base_plane_width;
679 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
680 mfbi->x_aoi_d = base_plane_width - var->xres;
681 if (mfbi->y_aoi_d < 0)
682 mfbi->y_aoi_d = 0;
683 if (upper_aoi_is_open) {
684 if (mfbi->y_aoi_d < upper_aoi_bottom)
685 mfbi->y_aoi_d = upper_aoi_bottom;
686 available_height = base_plane_height
687 - upper_aoi_bottom;
688 } else
689 available_height = base_plane_height;
690 if (var->yres > available_height)
691 var->yres = available_height;
692 if ((mfbi->y_aoi_d + var->yres) > base_plane_height)
693 mfbi->y_aoi_d = base_plane_height - var->yres;
694 break;
695 }
696 }
697 /*
698 * Checks to see if the hardware supports the state requested by var passed
699 * in. This function does not alter the hardware state! If the var passed in
700 * is slightly off by what the hardware can support then we alter the var
701 * PASSED in to what we can do. If the hardware doesn't support mode change
702 * a -EINVAL will be returned by the upper layers.
703 */
fsl_diu_check_var(struct fb_var_screeninfo * var,struct fb_info * info)704 static int fsl_diu_check_var(struct fb_var_screeninfo *var,
705 struct fb_info *info)
706 {
707 if (var->xres_virtual < var->xres)
708 var->xres_virtual = var->xres;
709 if (var->yres_virtual < var->yres)
710 var->yres_virtual = var->yres;
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
set_fix(struct fb_info * info)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
update_lcdc(struct fb_info * info)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
map_video_memory(struct fb_info * info)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
unmap_video_memory(struct fb_info * info)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 */
fsl_diu_set_aoi(struct fb_info * info)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 */
fsl_diu_get_pixel_format(unsigned int bits_per_pixel)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 */
fsl_diu_load_cursor_image(struct fb_info * info,const void * image,uint16_t bg,uint16_t fg,unsigned int width,unsigned int height)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 */
fsl_diu_cursor(struct fb_info * info,struct fb_cursor * cursor)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 /*
1066 * Determine the size of the cursor image data. Normally,
1067 * it's 8x16.
1068 */
1069 unsigned int image_size =
1070 DIV_ROUND_UP(cursor->image.width, 8) *
1071 cursor->image.height;
1072 unsigned int image_words =
1073 DIV_ROUND_UP(image_size, sizeof(uint32_t));
1074 unsigned int bg_idx = cursor->image.bg_color;
1075 unsigned int fg_idx = cursor->image.fg_color;
1076 uint32_t *image, *source, *mask;
1077 uint16_t fg, bg;
1078 unsigned int i;
1079
1080 if (info->state != FBINFO_STATE_RUNNING)
1081 return 0;
1082
1083 bg = ((info->cmap.red[bg_idx] & 0xf8) << 7) |
1084 ((info->cmap.green[bg_idx] & 0xf8) << 2) |
1085 ((info->cmap.blue[bg_idx] & 0xf8) >> 3) |
1086 1 << 15;
1087
1088 fg = ((info->cmap.red[fg_idx] & 0xf8) << 7) |
1089 ((info->cmap.green[fg_idx] & 0xf8) << 2) |
1090 ((info->cmap.blue[fg_idx] & 0xf8) >> 3) |
1091 1 << 15;
1092
1093 /* Use 32-bit operations on the data to improve performance */
1094 image = (uint32_t *)data->next_cursor;
1095 source = (uint32_t *)cursor->image.data;
1096 mask = (uint32_t *)cursor->mask;
1097
1098 if (cursor->rop == ROP_XOR)
1099 for (i = 0; i < image_words; i++)
1100 image[i] = source[i] ^ mask[i];
1101 else
1102 for (i = 0; i < image_words; i++)
1103 image[i] = source[i] & mask[i];
1104
1105 fsl_diu_load_cursor_image(info, image, bg, fg,
1106 cursor->image.width, cursor->image.height);
1107 }
1108
1109 /*
1110 * Show or hide the cursor. The cursor data is always stored in the
1111 * 'cursor' memory block, and the actual cursor position is always in
1112 * the DIU's CURS_POS register. To hide the cursor, we redirect the
1113 * CURSOR register to a blank cursor. The show the cursor, we
1114 * redirect the CURSOR register to the real cursor data.
1115 */
1116 if (cursor->enable)
1117 out_be32(&hw->cursor, DMA_ADDR(data, cursor));
1118 else
1119 out_be32(&hw->cursor, DMA_ADDR(data, blank_cursor));
1120
1121 return 0;
1122 }
1123
1124 /*
1125 * Using the fb_var_screeninfo in fb_info we set the resolution of this
1126 * particular framebuffer. This function alters the fb_fix_screeninfo stored
1127 * in fb_info. It does not alter var in fb_info since we are using that
1128 * data. This means we depend on the data in var inside fb_info to be
1129 * supported by the hardware. fsl_diu_check_var is always called before
1130 * fsl_diu_set_par to ensure this.
1131 */
fsl_diu_set_par(struct fb_info * info)1132 static int fsl_diu_set_par(struct fb_info *info)
1133 {
1134 unsigned long len;
1135 struct fb_var_screeninfo *var = &info->var;
1136 struct mfb_info *mfbi = info->par;
1137 struct fsl_diu_data *data = mfbi->parent;
1138 struct diu_ad *ad = mfbi->ad;
1139 struct diu __iomem *hw;
1140
1141 hw = data->diu_reg;
1142
1143 set_fix(info);
1144
1145 len = info->var.yres_virtual * info->fix.line_length;
1146 /* Alloc & dealloc each time resolution/bpp change */
1147 if (len != info->fix.smem_len) {
1148 if (info->fix.smem_start)
1149 unmap_video_memory(info);
1150
1151 /* Memory allocation for framebuffer */
1152 if (map_video_memory(info)) {
1153 dev_err(info->dev, "unable to allocate fb memory 1\n");
1154 return -ENOMEM;
1155 }
1156 }
1157
1158 if (diu_ops.get_pixel_format)
1159 ad->pix_fmt = diu_ops.get_pixel_format(data->monitor_port,
1160 var->bits_per_pixel);
1161 else
1162 ad->pix_fmt = fsl_diu_get_pixel_format(var->bits_per_pixel);
1163
1164 ad->addr = cpu_to_le32(info->fix.smem_start);
1165 ad->src_size_g_alpha = cpu_to_le32((var->yres_virtual << 12) |
1166 var->xres_virtual) | mfbi->g_alpha;
1167 /* AOI should not be greater than display size */
1168 ad->aoi_size = cpu_to_le32((var->yres << 16) | var->xres);
1169 ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
1170 ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
1171
1172 /* Disable chroma keying function */
1173 ad->ckmax_r = 0;
1174 ad->ckmax_g = 0;
1175 ad->ckmax_b = 0;
1176
1177 ad->ckmin_r = 255;
1178 ad->ckmin_g = 255;
1179 ad->ckmin_b = 255;
1180
1181 if (mfbi->index == PLANE0)
1182 update_lcdc(info);
1183 return 0;
1184 }
1185
CNVT_TOHW(__u32 val,__u32 width)1186 static inline __u32 CNVT_TOHW(__u32 val, __u32 width)
1187 {
1188 return ((val << width) + 0x7FFF - val) >> 16;
1189 }
1190
1191 /*
1192 * Set a single color register. The values supplied have a 16 bit magnitude
1193 * which needs to be scaled in this function for the hardware. Things to take
1194 * into consideration are how many color registers, if any, are supported with
1195 * the current color visual. With truecolor mode no color palettes are
1196 * supported. Here a pseudo palette is created which we store the value in
1197 * pseudo_palette in struct fb_info. For pseudocolor mode we have a limited
1198 * color palette.
1199 */
fsl_diu_setcolreg(unsigned int regno,unsigned int red,unsigned int green,unsigned int blue,unsigned int transp,struct fb_info * info)1200 static int fsl_diu_setcolreg(unsigned int regno, unsigned int red,
1201 unsigned int green, unsigned int blue,
1202 unsigned int transp, struct fb_info *info)
1203 {
1204 int ret = 1;
1205
1206 /*
1207 * If greyscale is true, then we convert the RGB value
1208 * to greyscale no matter what visual we are using.
1209 */
1210 if (info->var.grayscale)
1211 red = green = blue = (19595 * red + 38470 * green +
1212 7471 * blue) >> 16;
1213 switch (info->fix.visual) {
1214 case FB_VISUAL_TRUECOLOR:
1215 /*
1216 * 16-bit True Colour. We encode the RGB value
1217 * according to the RGB bitfield information.
1218 */
1219 if (regno < 16) {
1220 u32 *pal = info->pseudo_palette;
1221 u32 v;
1222
1223 red = CNVT_TOHW(red, info->var.red.length);
1224 green = CNVT_TOHW(green, info->var.green.length);
1225 blue = CNVT_TOHW(blue, info->var.blue.length);
1226 transp = CNVT_TOHW(transp, info->var.transp.length);
1227
1228 v = (red << info->var.red.offset) |
1229 (green << info->var.green.offset) |
1230 (blue << info->var.blue.offset) |
1231 (transp << info->var.transp.offset);
1232
1233 pal[regno] = v;
1234 ret = 0;
1235 }
1236 break;
1237 }
1238
1239 return ret;
1240 }
1241
1242 /*
1243 * Pan (or wrap, depending on the `vmode' field) the display using the
1244 * 'xoffset' and 'yoffset' fields of the 'var' structure. If the values
1245 * don't fit, return -EINVAL.
1246 */
fsl_diu_pan_display(struct fb_var_screeninfo * var,struct fb_info * info)1247 static int fsl_diu_pan_display(struct fb_var_screeninfo *var,
1248 struct fb_info *info)
1249 {
1250 if ((info->var.xoffset == var->xoffset) &&
1251 (info->var.yoffset == var->yoffset))
1252 return 0; /* No change, do nothing */
1253
1254 if (var->xoffset + info->var.xres > info->var.xres_virtual
1255 || var->yoffset + info->var.yres > info->var.yres_virtual)
1256 return -EINVAL;
1257
1258 info->var.xoffset = var->xoffset;
1259 info->var.yoffset = var->yoffset;
1260
1261 if (var->vmode & FB_VMODE_YWRAP)
1262 info->var.vmode |= FB_VMODE_YWRAP;
1263 else
1264 info->var.vmode &= ~FB_VMODE_YWRAP;
1265
1266 fsl_diu_set_aoi(info);
1267
1268 return 0;
1269 }
1270
fsl_diu_ioctl(struct fb_info * info,unsigned int cmd,unsigned long arg)1271 static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
1272 unsigned long arg)
1273 {
1274 struct mfb_info *mfbi = info->par;
1275 struct diu_ad *ad = mfbi->ad;
1276 struct mfb_chroma_key ck;
1277 unsigned char global_alpha;
1278 struct aoi_display_offset aoi_d;
1279 __u32 pix_fmt;
1280 void __user *buf = (void __user *)arg;
1281
1282 if (!arg)
1283 return -EINVAL;
1284
1285 dev_dbg(info->dev, "ioctl %08x (dir=%s%s type=%u nr=%u size=%u)\n", cmd,
1286 _IOC_DIR(cmd) & _IOC_READ ? "R" : "",
1287 _IOC_DIR(cmd) & _IOC_WRITE ? "W" : "",
1288 _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
1289
1290 switch (cmd) {
1291 case MFB_SET_PIXFMT_OLD:
1292 dev_warn(info->dev,
1293 "MFB_SET_PIXFMT value of 0x%08x is deprecated.\n",
1294 MFB_SET_PIXFMT_OLD);
1295 case MFB_SET_PIXFMT:
1296 if (copy_from_user(&pix_fmt, buf, sizeof(pix_fmt)))
1297 return -EFAULT;
1298 ad->pix_fmt = pix_fmt;
1299 break;
1300 case MFB_GET_PIXFMT_OLD:
1301 dev_warn(info->dev,
1302 "MFB_GET_PIXFMT value of 0x%08x is deprecated.\n",
1303 MFB_GET_PIXFMT_OLD);
1304 case MFB_GET_PIXFMT:
1305 pix_fmt = ad->pix_fmt;
1306 if (copy_to_user(buf, &pix_fmt, sizeof(pix_fmt)))
1307 return -EFAULT;
1308 break;
1309 case MFB_SET_AOID:
1310 if (copy_from_user(&aoi_d, buf, sizeof(aoi_d)))
1311 return -EFAULT;
1312 mfbi->x_aoi_d = aoi_d.x_aoi_d;
1313 mfbi->y_aoi_d = aoi_d.y_aoi_d;
1314 fsl_diu_check_var(&info->var, info);
1315 fsl_diu_set_aoi(info);
1316 break;
1317 case MFB_GET_AOID:
1318 aoi_d.x_aoi_d = mfbi->x_aoi_d;
1319 aoi_d.y_aoi_d = mfbi->y_aoi_d;
1320 if (copy_to_user(buf, &aoi_d, sizeof(aoi_d)))
1321 return -EFAULT;
1322 break;
1323 case MFB_GET_ALPHA:
1324 global_alpha = mfbi->g_alpha;
1325 if (copy_to_user(buf, &global_alpha, sizeof(global_alpha)))
1326 return -EFAULT;
1327 break;
1328 case MFB_SET_ALPHA:
1329 /* set panel information */
1330 if (copy_from_user(&global_alpha, buf, sizeof(global_alpha)))
1331 return -EFAULT;
1332 ad->src_size_g_alpha = (ad->src_size_g_alpha & (~0xff)) |
1333 (global_alpha & 0xff);
1334 mfbi->g_alpha = global_alpha;
1335 break;
1336 case MFB_SET_CHROMA_KEY:
1337 /* set panel winformation */
1338 if (copy_from_user(&ck, buf, sizeof(ck)))
1339 return -EFAULT;
1340
1341 if (ck.enable &&
1342 (ck.red_max < ck.red_min ||
1343 ck.green_max < ck.green_min ||
1344 ck.blue_max < ck.blue_min))
1345 return -EINVAL;
1346
1347 if (!ck.enable) {
1348 ad->ckmax_r = 0;
1349 ad->ckmax_g = 0;
1350 ad->ckmax_b = 0;
1351 ad->ckmin_r = 255;
1352 ad->ckmin_g = 255;
1353 ad->ckmin_b = 255;
1354 } else {
1355 ad->ckmax_r = ck.red_max;
1356 ad->ckmax_g = ck.green_max;
1357 ad->ckmax_b = ck.blue_max;
1358 ad->ckmin_r = ck.red_min;
1359 ad->ckmin_g = ck.green_min;
1360 ad->ckmin_b = ck.blue_min;
1361 }
1362 break;
1363 #ifdef CONFIG_PPC_MPC512x
1364 case MFB_SET_GAMMA: {
1365 struct fsl_diu_data *data = mfbi->parent;
1366
1367 if (copy_from_user(data->gamma, buf, sizeof(data->gamma)))
1368 return -EFAULT;
1369 setbits32(&data->diu_reg->gamma, 0); /* Force table reload */
1370 break;
1371 }
1372 case MFB_GET_GAMMA: {
1373 struct fsl_diu_data *data = mfbi->parent;
1374
1375 if (copy_to_user(buf, data->gamma, sizeof(data->gamma)))
1376 return -EFAULT;
1377 break;
1378 }
1379 #endif
1380 default:
1381 dev_err(info->dev, "unknown ioctl command (0x%08X)\n", cmd);
1382 return -ENOIOCTLCMD;
1383 }
1384
1385 return 0;
1386 }
1387
fsl_diu_enable_interrupts(struct fsl_diu_data * data)1388 static inline void fsl_diu_enable_interrupts(struct fsl_diu_data *data)
1389 {
1390 u32 int_mask = INT_UNDRUN; /* enable underrun detection */
1391
1392 if (IS_ENABLED(CONFIG_NOT_COHERENT_CACHE))
1393 int_mask |= INT_VSYNC; /* enable vertical sync */
1394
1395 clrbits32(&data->diu_reg->int_mask, int_mask);
1396 }
1397
1398 /* turn on fb if count == 1
1399 */
fsl_diu_open(struct fb_info * info,int user)1400 static int fsl_diu_open(struct fb_info *info, int user)
1401 {
1402 struct mfb_info *mfbi = info->par;
1403 int res = 0;
1404
1405 /* free boot splash memory on first /dev/fb0 open */
1406 if ((mfbi->index == PLANE0) && diu_ops.release_bootmem)
1407 diu_ops.release_bootmem();
1408
1409 spin_lock(&diu_lock);
1410 mfbi->count++;
1411 if (mfbi->count == 1) {
1412 fsl_diu_check_var(&info->var, info);
1413 res = fsl_diu_set_par(info);
1414 if (res < 0)
1415 mfbi->count--;
1416 else {
1417 fsl_diu_enable_interrupts(mfbi->parent);
1418 fsl_diu_enable_panel(info);
1419 }
1420 }
1421
1422 spin_unlock(&diu_lock);
1423 return res;
1424 }
1425
1426 /* turn off fb if count == 0
1427 */
fsl_diu_release(struct fb_info * info,int user)1428 static int fsl_diu_release(struct fb_info *info, int user)
1429 {
1430 struct mfb_info *mfbi = info->par;
1431 int res = 0;
1432
1433 spin_lock(&diu_lock);
1434 mfbi->count--;
1435 if (mfbi->count == 0) {
1436 struct fsl_diu_data *data = mfbi->parent;
1437 bool disable = true;
1438 int i;
1439
1440 /* Disable interrupts only if all AOIs are closed */
1441 for (i = 0; i < NUM_AOIS; i++) {
1442 struct mfb_info *mi = data->fsl_diu_info[i].par;
1443
1444 if (mi->count)
1445 disable = false;
1446 }
1447 if (disable)
1448 out_be32(&data->diu_reg->int_mask, 0xffffffff);
1449 fsl_diu_disable_panel(info);
1450 }
1451
1452 spin_unlock(&diu_lock);
1453 return res;
1454 }
1455
1456 static struct fb_ops fsl_diu_ops = {
1457 .owner = THIS_MODULE,
1458 .fb_check_var = fsl_diu_check_var,
1459 .fb_set_par = fsl_diu_set_par,
1460 .fb_setcolreg = fsl_diu_setcolreg,
1461 .fb_pan_display = fsl_diu_pan_display,
1462 .fb_fillrect = cfb_fillrect,
1463 .fb_copyarea = cfb_copyarea,
1464 .fb_imageblit = cfb_imageblit,
1465 .fb_ioctl = fsl_diu_ioctl,
1466 .fb_open = fsl_diu_open,
1467 .fb_release = fsl_diu_release,
1468 .fb_cursor = fsl_diu_cursor,
1469 };
1470
install_fb(struct fb_info * info)1471 static int install_fb(struct fb_info *info)
1472 {
1473 int rc;
1474 struct mfb_info *mfbi = info->par;
1475 struct fsl_diu_data *data = mfbi->parent;
1476 const char *aoi_mode, *init_aoi_mode = "320x240";
1477 struct fb_videomode *db = fsl_diu_mode_db;
1478 unsigned int dbsize = ARRAY_SIZE(fsl_diu_mode_db);
1479 int has_default_mode = 1;
1480
1481 info->var.activate = FB_ACTIVATE_NOW;
1482 info->fbops = &fsl_diu_ops;
1483 info->flags = FBINFO_DEFAULT | FBINFO_VIRTFB | FBINFO_PARTIAL_PAN_OK |
1484 FBINFO_READS_FAST;
1485 info->pseudo_palette = mfbi->pseudo_palette;
1486
1487 rc = fb_alloc_cmap(&info->cmap, 16, 0);
1488 if (rc)
1489 return rc;
1490
1491 if (mfbi->index == PLANE0) {
1492 if (data->has_edid) {
1493 /* Now build modedb from EDID */
1494 fb_edid_to_monspecs(data->edid_data, &info->monspecs);
1495 fb_videomode_to_modelist(info->monspecs.modedb,
1496 info->monspecs.modedb_len,
1497 &info->modelist);
1498 db = info->monspecs.modedb;
1499 dbsize = info->monspecs.modedb_len;
1500 }
1501 aoi_mode = fb_mode;
1502 } else {
1503 aoi_mode = init_aoi_mode;
1504 }
1505 rc = fb_find_mode(&info->var, info, aoi_mode, db, dbsize, NULL,
1506 default_bpp);
1507 if (!rc) {
1508 /*
1509 * For plane 0 we continue and look into
1510 * driver's internal modedb.
1511 */
1512 if ((mfbi->index == PLANE0) && data->has_edid)
1513 has_default_mode = 0;
1514 else
1515 return -EINVAL;
1516 }
1517
1518 if (!has_default_mode) {
1519 rc = fb_find_mode(&info->var, info, aoi_mode, fsl_diu_mode_db,
1520 ARRAY_SIZE(fsl_diu_mode_db), NULL, default_bpp);
1521 if (rc)
1522 has_default_mode = 1;
1523 }
1524
1525 /* Still not found, use preferred mode from database if any */
1526 if (!has_default_mode && info->monspecs.modedb) {
1527 struct fb_monspecs *specs = &info->monspecs;
1528 struct fb_videomode *modedb = &specs->modedb[0];
1529
1530 /*
1531 * Get preferred timing. If not found,
1532 * first mode in database will be used.
1533 */
1534 if (specs->misc & FB_MISC_1ST_DETAIL) {
1535 int i;
1536
1537 for (i = 0; i < specs->modedb_len; i++) {
1538 if (specs->modedb[i].flag & FB_MODE_IS_FIRST) {
1539 modedb = &specs->modedb[i];
1540 break;
1541 }
1542 }
1543 }
1544
1545 info->var.bits_per_pixel = default_bpp;
1546 fb_videomode_to_var(&info->var, modedb);
1547 }
1548
1549 if (fsl_diu_check_var(&info->var, info)) {
1550 dev_err(info->dev, "fsl_diu_check_var failed\n");
1551 unmap_video_memory(info);
1552 fb_dealloc_cmap(&info->cmap);
1553 return -EINVAL;
1554 }
1555
1556 if (register_framebuffer(info) < 0) {
1557 dev_err(info->dev, "register_framebuffer failed\n");
1558 unmap_video_memory(info);
1559 fb_dealloc_cmap(&info->cmap);
1560 return -EINVAL;
1561 }
1562
1563 mfbi->registered = 1;
1564 dev_info(info->dev, "%s registered successfully\n", mfbi->id);
1565
1566 return 0;
1567 }
1568
uninstall_fb(struct fb_info * info)1569 static void uninstall_fb(struct fb_info *info)
1570 {
1571 struct mfb_info *mfbi = info->par;
1572
1573 if (!mfbi->registered)
1574 return;
1575
1576 unregister_framebuffer(info);
1577 unmap_video_memory(info);
1578 if (&info->cmap)
1579 fb_dealloc_cmap(&info->cmap);
1580
1581 mfbi->registered = 0;
1582 }
1583
fsl_diu_isr(int irq,void * dev_id)1584 static irqreturn_t fsl_diu_isr(int irq, void *dev_id)
1585 {
1586 struct diu __iomem *hw = dev_id;
1587 uint32_t status = in_be32(&hw->int_status);
1588
1589 if (status) {
1590 /* This is the workaround for underrun */
1591 if (status & INT_UNDRUN) {
1592 out_be32(&hw->diu_mode, 0);
1593 udelay(1);
1594 out_be32(&hw->diu_mode, 1);
1595 }
1596 #if defined(CONFIG_NOT_COHERENT_CACHE)
1597 else if (status & INT_VSYNC) {
1598 unsigned int i;
1599
1600 for (i = 0; i < coherence_data_size;
1601 i += d_cache_line_size)
1602 __asm__ __volatile__ (
1603 "dcbz 0, %[input]"
1604 ::[input]"r"(&coherence_data[i]));
1605 }
1606 #endif
1607 return IRQ_HANDLED;
1608 }
1609 return IRQ_NONE;
1610 }
1611
1612 #ifdef CONFIG_PM
1613 /*
1614 * Power management hooks. Note that we won't be called from IRQ context,
1615 * unlike the blank functions above, so we may sleep.
1616 */
fsl_diu_suspend(struct platform_device * ofdev,pm_message_t state)1617 static int fsl_diu_suspend(struct platform_device *ofdev, pm_message_t state)
1618 {
1619 struct fsl_diu_data *data;
1620
1621 data = dev_get_drvdata(&ofdev->dev);
1622 disable_lcdc(data->fsl_diu_info);
1623
1624 return 0;
1625 }
1626
fsl_diu_resume(struct platform_device * ofdev)1627 static int fsl_diu_resume(struct platform_device *ofdev)
1628 {
1629 struct fsl_diu_data *data;
1630 unsigned int i;
1631
1632 data = dev_get_drvdata(&ofdev->dev);
1633
1634 fsl_diu_enable_interrupts(data);
1635 update_lcdc(data->fsl_diu_info);
1636 for (i = 0; i < NUM_AOIS; i++) {
1637 if (data->mfb[i].count)
1638 fsl_diu_enable_panel(&data->fsl_diu_info[i]);
1639 }
1640
1641 return 0;
1642 }
1643
1644 #else
1645 #define fsl_diu_suspend NULL
1646 #define fsl_diu_resume NULL
1647 #endif /* CONFIG_PM */
1648
store_monitor(struct device * device,struct device_attribute * attr,const char * buf,size_t count)1649 static ssize_t store_monitor(struct device *device,
1650 struct device_attribute *attr, const char *buf, size_t count)
1651 {
1652 enum fsl_diu_monitor_port old_monitor_port;
1653 struct fsl_diu_data *data =
1654 container_of(attr, struct fsl_diu_data, dev_attr);
1655
1656 old_monitor_port = data->monitor_port;
1657 data->monitor_port = fsl_diu_name_to_port(buf);
1658
1659 if (old_monitor_port != data->monitor_port) {
1660 /* All AOIs need adjust pixel format
1661 * fsl_diu_set_par only change the pixsel format here
1662 * unlikely to fail. */
1663 unsigned int i;
1664
1665 for (i=0; i < NUM_AOIS; i++)
1666 fsl_diu_set_par(&data->fsl_diu_info[i]);
1667 }
1668 return count;
1669 }
1670
show_monitor(struct device * device,struct device_attribute * attr,char * buf)1671 static ssize_t show_monitor(struct device *device,
1672 struct device_attribute *attr, char *buf)
1673 {
1674 struct fsl_diu_data *data =
1675 container_of(attr, struct fsl_diu_data, dev_attr);
1676
1677 switch (data->monitor_port) {
1678 case FSL_DIU_PORT_DVI:
1679 return sprintf(buf, "DVI\n");
1680 case FSL_DIU_PORT_LVDS:
1681 return sprintf(buf, "Single-link LVDS\n");
1682 case FSL_DIU_PORT_DLVDS:
1683 return sprintf(buf, "Dual-link LVDS\n");
1684 }
1685
1686 return 0;
1687 }
1688
fsl_diu_probe(struct platform_device * pdev)1689 static int fsl_diu_probe(struct platform_device *pdev)
1690 {
1691 struct device_node *np = pdev->dev.of_node;
1692 struct mfb_info *mfbi;
1693 struct fsl_diu_data *data;
1694 dma_addr_t dma_addr; /* DMA addr of fsl_diu_data struct */
1695 const void *prop;
1696 unsigned int i;
1697 int ret;
1698
1699 data = dmam_alloc_coherent(&pdev->dev, sizeof(struct fsl_diu_data),
1700 &dma_addr, GFP_DMA | __GFP_ZERO);
1701 if (!data)
1702 return -ENOMEM;
1703 data->dma_addr = dma_addr;
1704
1705 /*
1706 * dma_alloc_coherent() uses a page allocator, so the address is
1707 * always page-aligned. We need the memory to be 32-byte aligned,
1708 * so that's good. However, if one day the allocator changes, we
1709 * need to catch that. It's not worth the effort to handle unaligned
1710 * alloctions now because it's highly unlikely to ever be a problem.
1711 */
1712 if ((unsigned long)data & 31) {
1713 dev_err(&pdev->dev, "misaligned allocation");
1714 ret = -ENOMEM;
1715 goto error;
1716 }
1717
1718 spin_lock_init(&data->reg_lock);
1719
1720 for (i = 0; i < NUM_AOIS; i++) {
1721 struct fb_info *info = &data->fsl_diu_info[i];
1722
1723 info->device = &pdev->dev;
1724 info->par = &data->mfb[i];
1725
1726 /*
1727 * We store the physical address of the AD in the reserved
1728 * 'paddr' field of the AD itself.
1729 */
1730 data->ad[i].paddr = DMA_ADDR(data, ad[i]);
1731
1732 info->fix.smem_start = 0;
1733
1734 /* Initialize the AOI data structure */
1735 mfbi = info->par;
1736 memcpy(mfbi, &mfb_template[i], sizeof(struct mfb_info));
1737 mfbi->parent = data;
1738 mfbi->ad = &data->ad[i];
1739 }
1740
1741 /* Get the EDID data from the device tree, if present */
1742 prop = of_get_property(np, "edid", &ret);
1743 if (prop && ret == EDID_LENGTH) {
1744 memcpy(data->edid_data, prop, EDID_LENGTH);
1745 data->has_edid = true;
1746 }
1747
1748 data->diu_reg = of_iomap(np, 0);
1749 if (!data->diu_reg) {
1750 dev_err(&pdev->dev, "cannot map DIU registers\n");
1751 ret = -EFAULT;
1752 goto error;
1753 }
1754
1755 /* Get the IRQ of the DIU */
1756 data->irq = irq_of_parse_and_map(np, 0);
1757
1758 if (!data->irq) {
1759 dev_err(&pdev->dev, "could not get DIU IRQ\n");
1760 ret = -EINVAL;
1761 goto error;
1762 }
1763 data->monitor_port = monitor_port;
1764
1765 /* Initialize the dummy Area Descriptor */
1766 data->dummy_ad.addr = cpu_to_le32(DMA_ADDR(data, dummy_aoi));
1767 data->dummy_ad.pix_fmt = 0x88882317;
1768 data->dummy_ad.src_size_g_alpha = cpu_to_le32((4 << 12) | 4);
1769 data->dummy_ad.aoi_size = cpu_to_le32((4 << 16) | 2);
1770 data->dummy_ad.offset_xyi = 0;
1771 data->dummy_ad.offset_xyd = 0;
1772 data->dummy_ad.next_ad = 0;
1773 data->dummy_ad.paddr = DMA_ADDR(data, dummy_ad);
1774
1775 /*
1776 * Let DIU continue to display splash screen if it was pre-initialized
1777 * by the bootloader; otherwise, clear the display.
1778 */
1779 if (in_be32(&data->diu_reg->diu_mode) == MFB_MODE0)
1780 out_be32(&data->diu_reg->desc[0], 0);
1781
1782 out_be32(&data->diu_reg->desc[1], data->dummy_ad.paddr);
1783 out_be32(&data->diu_reg->desc[2], data->dummy_ad.paddr);
1784
1785 /*
1786 * Older versions of U-Boot leave interrupts enabled, so disable
1787 * all of them and clear the status register.
1788 */
1789 out_be32(&data->diu_reg->int_mask, 0xffffffff);
1790 in_be32(&data->diu_reg->int_status);
1791
1792 ret = request_irq(data->irq, fsl_diu_isr, 0, "fsl-diu-fb",
1793 data->diu_reg);
1794 if (ret) {
1795 dev_err(&pdev->dev, "could not claim irq\n");
1796 goto error;
1797 }
1798
1799 for (i = 0; i < NUM_AOIS; i++) {
1800 ret = install_fb(&data->fsl_diu_info[i]);
1801 if (ret) {
1802 dev_err(&pdev->dev, "could not register fb %d\n", i);
1803 free_irq(data->irq, data->diu_reg);
1804 goto error;
1805 }
1806 }
1807
1808 sysfs_attr_init(&data->dev_attr.attr);
1809 data->dev_attr.attr.name = "monitor";
1810 data->dev_attr.attr.mode = S_IRUGO|S_IWUSR;
1811 data->dev_attr.show = show_monitor;
1812 data->dev_attr.store = store_monitor;
1813 ret = device_create_file(&pdev->dev, &data->dev_attr);
1814 if (ret) {
1815 dev_err(&pdev->dev, "could not create sysfs file %s\n",
1816 data->dev_attr.attr.name);
1817 }
1818
1819 dev_set_drvdata(&pdev->dev, data);
1820 return 0;
1821
1822 error:
1823 for (i = 0; i < NUM_AOIS; i++)
1824 uninstall_fb(&data->fsl_diu_info[i]);
1825
1826 iounmap(data->diu_reg);
1827
1828 return ret;
1829 }
1830
fsl_diu_remove(struct platform_device * pdev)1831 static int fsl_diu_remove(struct platform_device *pdev)
1832 {
1833 struct fsl_diu_data *data;
1834 int i;
1835
1836 data = dev_get_drvdata(&pdev->dev);
1837 disable_lcdc(&data->fsl_diu_info[0]);
1838
1839 free_irq(data->irq, data->diu_reg);
1840
1841 for (i = 0; i < NUM_AOIS; i++)
1842 uninstall_fb(&data->fsl_diu_info[i]);
1843
1844 iounmap(data->diu_reg);
1845
1846 return 0;
1847 }
1848
1849 #ifndef MODULE
fsl_diu_setup(char * options)1850 static int __init fsl_diu_setup(char *options)
1851 {
1852 char *opt;
1853 unsigned long val;
1854
1855 if (!options || !*options)
1856 return 0;
1857
1858 while ((opt = strsep(&options, ",")) != NULL) {
1859 if (!*opt)
1860 continue;
1861 if (!strncmp(opt, "monitor=", 8)) {
1862 monitor_port = fsl_diu_name_to_port(opt + 8);
1863 } else if (!strncmp(opt, "bpp=", 4)) {
1864 if (!kstrtoul(opt + 4, 10, &val))
1865 default_bpp = val;
1866 } else
1867 fb_mode = opt;
1868 }
1869
1870 return 0;
1871 }
1872 #endif
1873
1874 static const struct of_device_id fsl_diu_match[] = {
1875 #ifdef CONFIG_PPC_MPC512x
1876 {
1877 .compatible = "fsl,mpc5121-diu",
1878 },
1879 #endif
1880 {
1881 .compatible = "fsl,diu",
1882 },
1883 {}
1884 };
1885 MODULE_DEVICE_TABLE(of, fsl_diu_match);
1886
1887 static struct platform_driver fsl_diu_driver = {
1888 .driver = {
1889 .name = "fsl-diu-fb",
1890 .of_match_table = fsl_diu_match,
1891 },
1892 .probe = fsl_diu_probe,
1893 .remove = fsl_diu_remove,
1894 .suspend = fsl_diu_suspend,
1895 .resume = fsl_diu_resume,
1896 };
1897
fsl_diu_init(void)1898 static int __init fsl_diu_init(void)
1899 {
1900 #ifdef CONFIG_NOT_COHERENT_CACHE
1901 struct device_node *np;
1902 const u32 *prop;
1903 #endif
1904 int ret;
1905 #ifndef MODULE
1906 char *option;
1907
1908 /*
1909 * For kernel boot options (in 'video=xxxfb:<options>' format)
1910 */
1911 if (fb_get_options("fslfb", &option))
1912 return -ENODEV;
1913 fsl_diu_setup(option);
1914 #else
1915 monitor_port = fsl_diu_name_to_port(monitor_string);
1916 #endif
1917
1918 /*
1919 * Must to verify set_pixel_clock. If not implement on platform,
1920 * then that means that there is no platform support for the DIU.
1921 */
1922 if (!diu_ops.set_pixel_clock)
1923 return -ENODEV;
1924
1925 pr_info("Freescale Display Interface Unit (DIU) framebuffer driver\n");
1926
1927 #ifdef CONFIG_NOT_COHERENT_CACHE
1928 np = of_find_node_by_type(NULL, "cpu");
1929 if (!np) {
1930 pr_err("fsl-diu-fb: can't find 'cpu' device node\n");
1931 return -ENODEV;
1932 }
1933
1934 prop = of_get_property(np, "d-cache-size", NULL);
1935 if (prop == NULL) {
1936 pr_err("fsl-diu-fb: missing 'd-cache-size' property' "
1937 "in 'cpu' node\n");
1938 of_node_put(np);
1939 return -ENODEV;
1940 }
1941
1942 /*
1943 * Freescale PLRU requires 13/8 times the cache size to do a proper
1944 * displacement flush
1945 */
1946 coherence_data_size = be32_to_cpup(prop) * 13;
1947 coherence_data_size /= 8;
1948
1949 pr_debug("fsl-diu-fb: coherence data size is %zu bytes\n",
1950 coherence_data_size);
1951
1952 prop = of_get_property(np, "d-cache-line-size", NULL);
1953 if (prop == NULL) {
1954 pr_err("fsl-diu-fb: missing 'd-cache-line-size' property' "
1955 "in 'cpu' node\n");
1956 of_node_put(np);
1957 return -ENODEV;
1958 }
1959 d_cache_line_size = be32_to_cpup(prop);
1960
1961 pr_debug("fsl-diu-fb: cache lines size is %u bytes\n",
1962 d_cache_line_size);
1963
1964 of_node_put(np);
1965 coherence_data = vmalloc(coherence_data_size);
1966 if (!coherence_data)
1967 return -ENOMEM;
1968 #endif
1969
1970 ret = platform_driver_register(&fsl_diu_driver);
1971 if (ret) {
1972 pr_err("fsl-diu-fb: failed to register platform driver\n");
1973 #if defined(CONFIG_NOT_COHERENT_CACHE)
1974 vfree(coherence_data);
1975 #endif
1976 }
1977 return ret;
1978 }
1979
fsl_diu_exit(void)1980 static void __exit fsl_diu_exit(void)
1981 {
1982 platform_driver_unregister(&fsl_diu_driver);
1983 #if defined(CONFIG_NOT_COHERENT_CACHE)
1984 vfree(coherence_data);
1985 #endif
1986 }
1987
1988 module_init(fsl_diu_init);
1989 module_exit(fsl_diu_exit);
1990
1991 MODULE_AUTHOR("York Sun <yorksun@freescale.com>");
1992 MODULE_DESCRIPTION("Freescale DIU framebuffer driver");
1993 MODULE_LICENSE("GPL");
1994
1995 module_param_named(mode, fb_mode, charp, 0);
1996 MODULE_PARM_DESC(mode,
1997 "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
1998 module_param_named(bpp, default_bpp, ulong, 0);
1999 MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified in 'mode'");
2000 module_param_named(monitor, monitor_string, charp, 0);
2001 MODULE_PARM_DESC(monitor, "Specify the monitor port "
2002 "(\"dvi\", \"lvds\", or \"dlvds\") if supported by the platform");
2003
2004
