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