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Remove workaround for unimmunized rcu_dereference from mce_log()
[linux-2.6/kvm.git] / drivers / video / sm501fb.c
blob1be95a68d69678d4ba05400bedd506467826cb99
1 /* linux/drivers/video/sm501fb.c
2 *
3 * Copyright (c) 2006 Simtec Electronics
4 * Vincent Sanders <vince@simtec.co.uk>
5 * Ben Dooks <ben@simtec.co.uk>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * Framebuffer driver for the Silicon Motion SM501
12 */
13
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/errno.h>
17 #include <linux/string.h>
18 #include <linux/mm.h>
19 #include <linux/tty.h>
20 #include <linux/slab.h>
21 #include <linux/delay.h>
22 #include <linux/fb.h>
23 #include <linux/init.h>
24 #include <linux/vmalloc.h>
25 #include <linux/dma-mapping.h>
26 #include <linux/interrupt.h>
27 #include <linux/workqueue.h>
28 #include <linux/wait.h>
29 #include <linux/platform_device.h>
30 #include <linux/clk.h>
31 #include <linux/console.h>
32
33 #include <asm/io.h>
34 #include <asm/uaccess.h>
35 #include <asm/div64.h>
36
37 #ifdef CONFIG_PM
38 #include <linux/pm.h>
39 #endif
40
41 #include <linux/sm501.h>
42 #include <linux/sm501-regs.h>
43
44 #define NR_PALETTE 256
45
46 enum sm501_controller {
47 HEAD_CRT = 0,
48 HEAD_PANEL = 1,
49 };
50
51 /* SM501 memory adress */
52 struct sm501_mem {
53 unsigned long size;
54 unsigned long sm_addr;
55 void __iomem *k_addr;
56 };
57
58 /* private data that is shared between all frambuffers* */
59 struct sm501fb_info {
60 struct device *dev;
61 struct fb_info *fb[2]; /* fb info for both heads */
62 struct resource *fbmem_res; /* framebuffer resource */
63 struct resource *regs_res; /* registers resource */
64 struct sm501_platdata_fb *pdata; /* our platform data */
65
66 unsigned long pm_crt_ctrl; /* pm: crt ctrl save */
67
68 int irq;
69 int swap_endian; /* set to swap rgb=>bgr */
70 void __iomem *regs; /* remapped registers */
71 void __iomem *fbmem; /* remapped framebuffer */
72 size_t fbmem_len; /* length of remapped region */
73 };
74
75 /* per-framebuffer private data */
76 struct sm501fb_par {
77 u32 pseudo_palette[16];
78
79 enum sm501_controller head;
80 struct sm501_mem cursor;
81 struct sm501_mem screen;
82 struct fb_ops ops;
83
84 void *store_fb;
85 void *store_cursor;
86 void __iomem *cursor_regs;
87 struct sm501fb_info *info;
88 };
89
90 /* Helper functions */
91
92 static inline int h_total(struct fb_var_screeninfo *var)
93 {
94 return var->xres + var->left_margin +
95 var->right_margin + var->hsync_len;
96 }
97
98 static inline int v_total(struct fb_var_screeninfo *var)
99 {
100 return var->yres + var->upper_margin +
101 var->lower_margin + var->vsync_len;
102 }
103
104 /* sm501fb_sync_regs()
105 *
106 * This call is mainly for PCI bus systems where we need to
107 * ensure that any writes to the bus are completed before the
108 * next phase, or after completing a function.
109 */
110
111 static inline void sm501fb_sync_regs(struct sm501fb_info *info)
112 {
113 readl(info->regs);
114 }
115
116 /* sm501_alloc_mem
117 *
118 * This is an attempt to lay out memory for the two framebuffers and
119 * everything else
120 *
121 * |fbmem_res->start fbmem_res->end|
122 * | |
123 * |fb[0].fix.smem_start | |fb[1].fix.smem_start | 2K |
124 * |-> fb[0].fix.smem_len <-| spare |-> fb[1].fix.smem_len <-|-> cursors <-|
125 *
126 * The "spare" space is for the 2d engine data
127 * the fixed is space for the cursors (2x1Kbyte)
128 *
129 * we need to allocate memory for the 2D acceleration engine
130 * command list and the data for the engine to deal with.
131 *
132 * - all allocations must be 128bit aligned
133 * - cursors are 64x64x2 bits (1Kbyte)
134 *
135 */
136
137 #define SM501_MEMF_CURSOR (1)
138 #define SM501_MEMF_PANEL (2)
139 #define SM501_MEMF_CRT (4)
140 #define SM501_MEMF_ACCEL (8)
141
142 static int sm501_alloc_mem(struct sm501fb_info *inf, struct sm501_mem *mem,
143 unsigned int why, size_t size)
144 {
145 unsigned int ptr = 0;
146
147 switch (why) {
148 case SM501_MEMF_CURSOR:
149 ptr = inf->fbmem_len - size;
150 inf->fbmem_len = ptr;
151 break;
152
153 case SM501_MEMF_PANEL:
154 ptr = inf->fbmem_len - size;
155 if (ptr < inf->fb[0]->fix.smem_len)
156 return -ENOMEM;
157
158 break;
159
160 case SM501_MEMF_CRT:
161 ptr = 0;
162 break;
163
164 case SM501_MEMF_ACCEL:
165 ptr = inf->fb[0]->fix.smem_len;
166
167 if ((ptr + size) >
168 (inf->fb[1]->fix.smem_start - inf->fbmem_res->start))
169 return -ENOMEM;
170 break;
171
172 default:
173 return -EINVAL;
174 }
175
176 mem->size = size;
177 mem->sm_addr = ptr;
178 mem->k_addr = inf->fbmem + ptr;
179
180 dev_dbg(inf->dev, "%s: result %08lx, %p - %u, %zd\n",
181 __func__, mem->sm_addr, mem->k_addr, why, size);
182
183 return 0;
184 }
185
186 /* sm501fb_ps_to_hz
187 *
188 * Converts a period in picoseconds to Hz.
189 *
190 * Note, we try to keep this in Hz to minimise rounding with
191 * the limited PLL settings on the SM501.
192 */
193
194 static unsigned long sm501fb_ps_to_hz(unsigned long psvalue)
195 {
196 unsigned long long numerator=1000000000000ULL;
197
198 /* 10^12 / picosecond period gives frequency in Hz */
199 do_div(numerator, psvalue);
200 return (unsigned long)numerator;
201 }
202
203 /* sm501fb_hz_to_ps is identical to the oposite transform */
204
205 #define sm501fb_hz_to_ps(x) sm501fb_ps_to_hz(x)
206
207 /* sm501fb_setup_gamma
208 *
209 * Programs a linear 1.0 gamma ramp in case the gamma
210 * correction is enabled without programming anything else.
211 */
212
213 static void sm501fb_setup_gamma(struct sm501fb_info *fbi,
214 unsigned long palette)
215 {
216 unsigned long value = 0;
217 int offset;
218
219 /* set gamma values */
220 for (offset = 0; offset < 256 * 4; offset += 4) {
221 writel(value, fbi->regs + palette + offset);
222 value += 0x010101; /* Advance RGB by 1,1,1.*/
223 }
224 }
225
226 /* sm501fb_check_var
227 *
228 * check common variables for both panel and crt
229 */
230
231 static int sm501fb_check_var(struct fb_var_screeninfo *var,
232 struct fb_info *info)
233 {
234 struct sm501fb_par *par = info->par;
235 struct sm501fb_info *sm = par->info;
236 unsigned long tmp;
237
238 /* check we can fit these values into the registers */
239
240 if (var->hsync_len > 255 || var->vsync_len > 255)
241 return -EINVAL;
242
243 if ((var->xres + var->right_margin) >= 4096)
244 return -EINVAL;
245
246 if ((var->yres + var->lower_margin) > 2048)
247 return -EINVAL;
248
249 /* hard limits of device */
250
251 if (h_total(var) > 4096 || v_total(var) > 2048)
252 return -EINVAL;
253
254 /* check our line length is going to be 128 bit aligned */
255
256 tmp = (var->xres * var->bits_per_pixel) / 8;
257 if ((tmp & 15) != 0)
258 return -EINVAL;
259
260 /* check the virtual size */
261
262 if (var->xres_virtual > 4096 || var->yres_virtual > 2048)
263 return -EINVAL;
264
265 /* can cope with 8,16 or 32bpp */
266
267 if (var->bits_per_pixel <= 8)
268 var->bits_per_pixel = 8;
269 else if (var->bits_per_pixel <= 16)
270 var->bits_per_pixel = 16;
271 else if (var->bits_per_pixel == 24)
272 var->bits_per_pixel = 32;
273
274 /* set r/g/b positions and validate bpp */
275 switch(var->bits_per_pixel) {
276 case 8:
277 var->red.length = var->bits_per_pixel;
278 var->red.offset = 0;
279 var->green.length = var->bits_per_pixel;
280 var->green.offset = 0;
281 var->blue.length = var->bits_per_pixel;
282 var->blue.offset = 0;
283 var->transp.length = 0;
284
285 break;
286
287 case 16:
288 if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) {
289 var->red.offset = 11;
290 var->green.offset = 5;
291 var->blue.offset = 0;
292 } else {
293 var->blue.offset = 11;
294 var->green.offset = 5;
295 var->red.offset = 0;
296 }
297
298 var->red.length = 5;
299 var->green.length = 6;
300 var->blue.length = 5;
301 var->transp.length = 0;
302 break;
303
304 case 32:
305 if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) {
306 var->transp.offset = 0;
307 var->red.offset = 8;
308 var->green.offset = 16;
309 var->blue.offset = 24;
310 } else {
311 var->transp.offset = 24;
312 var->red.offset = 16;
313 var->green.offset = 8;
314 var->blue.offset = 0;
315 }
316
317 var->red.length = 8;
318 var->green.length = 8;
319 var->blue.length = 8;
320 var->transp.length = 0;
321 break;
322
323 default:
324 return -EINVAL;
325 }
326
327 return 0;
328 }
329
330 /*
331 * sm501fb_check_var_crt():
332 *
333 * check the parameters for the CRT head, and either bring them
334 * back into range, or return -EINVAL.
335 */
336
337 static int sm501fb_check_var_crt(struct fb_var_screeninfo *var,
338 struct fb_info *info)
339 {
340 return sm501fb_check_var(var, info);
341 }
342
343 /* sm501fb_check_var_pnl():
344 *
345 * check the parameters for the CRT head, and either bring them
346 * back into range, or return -EINVAL.
347 */
348
349 static int sm501fb_check_var_pnl(struct fb_var_screeninfo *var,
350 struct fb_info *info)
351 {
352 return sm501fb_check_var(var, info);
353 }
354
355 /* sm501fb_set_par_common
356 *
357 * set common registers for framebuffers
358 */
359
360 static int sm501fb_set_par_common(struct fb_info *info,
361 struct fb_var_screeninfo *var)
362 {
363 struct sm501fb_par *par = info->par;
364 struct sm501fb_info *fbi = par->info;
365 unsigned long pixclock; /* pixelclock in Hz */
366 unsigned long sm501pixclock; /* pixelclock the 501 can achive in Hz */
367 unsigned int mem_type;
368 unsigned int clock_type;
369 unsigned int head_addr;
370
371 dev_dbg(fbi->dev, "%s: %dx%d, bpp = %d, virtual %dx%d\n",
372 __func__, var->xres, var->yres, var->bits_per_pixel,
373 var->xres_virtual, var->yres_virtual);
374
375 switch (par->head) {
376 case HEAD_CRT:
377 mem_type = SM501_MEMF_CRT;
378 clock_type = SM501_CLOCK_V2XCLK;
379 head_addr = SM501_DC_CRT_FB_ADDR;
380 break;
381
382 case HEAD_PANEL:
383 mem_type = SM501_MEMF_PANEL;
384 clock_type = SM501_CLOCK_P2XCLK;
385 head_addr = SM501_DC_PANEL_FB_ADDR;
386 break;
387
388 default:
389 mem_type = 0; /* stop compiler warnings */
390 head_addr = 0;
391 clock_type = 0;
392 }
393
394 switch (var->bits_per_pixel) {
395 case 8:
396 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
397 break;
398
399 case 16:
400 info->fix.visual = FB_VISUAL_DIRECTCOLOR;
401 break;
402
403 case 32:
404 info->fix.visual = FB_VISUAL_TRUECOLOR;
405 break;
406 }
407
408 /* allocate fb memory within 501 */
409 info->fix.line_length = (var->xres_virtual * var->bits_per_pixel)/8;
410 info->fix.smem_len = info->fix.line_length * var->yres_virtual;
411
412 dev_dbg(fbi->dev, "%s: line length = %u\n", __func__,
413 info->fix.line_length);
414
415 if (sm501_alloc_mem(fbi, &par->screen, mem_type,
416 info->fix.smem_len)) {
417 dev_err(fbi->dev, "no memory available\n");
418 return -ENOMEM;
419 }
420
421 info->fix.smem_start = fbi->fbmem_res->start + par->screen.sm_addr;
422
423 info->screen_base = fbi->fbmem + par->screen.sm_addr;
424 info->screen_size = info->fix.smem_len;
425
426 /* set start of framebuffer to the screen */
427
428 writel(par->screen.sm_addr | SM501_ADDR_FLIP, fbi->regs + head_addr);
429
430 /* program CRT clock */
431
432 pixclock = sm501fb_ps_to_hz(var->pixclock);
433
434 sm501pixclock = sm501_set_clock(fbi->dev->parent, clock_type,
435 pixclock);
436
437 /* update fb layer with actual clock used */
438 var->pixclock = sm501fb_hz_to_ps(sm501pixclock);
439
440 dev_dbg(fbi->dev, "%s: pixclock(ps) = %u, pixclock(Hz) = %lu, "
441 "sm501pixclock = %lu, error = %ld%%\n",
442 __func__, var->pixclock, pixclock, sm501pixclock,
443 ((pixclock - sm501pixclock)*100)/pixclock);
444
445 return 0;
446 }
447
448 /* sm501fb_set_par_geometry
449 *
450 * set the geometry registers for specified framebuffer.
451 */
452
453 static void sm501fb_set_par_geometry(struct fb_info *info,
454 struct fb_var_screeninfo *var)
455 {
456 struct sm501fb_par *par = info->par;
457 struct sm501fb_info *fbi = par->info;
458 void __iomem *base = fbi->regs;
459 unsigned long reg;
460
461 if (par->head == HEAD_CRT)
462 base += SM501_DC_CRT_H_TOT;
463 else
464 base += SM501_DC_PANEL_H_TOT;
465
466 /* set framebuffer width and display width */
467
468 reg = info->fix.line_length;
469 reg |= ((var->xres * var->bits_per_pixel)/8) << 16;
470
471 writel(reg, fbi->regs + (par->head == HEAD_CRT ?
472 SM501_DC_CRT_FB_OFFSET : SM501_DC_PANEL_FB_OFFSET));
473
474 /* program horizontal total */
475
476 reg = (h_total(var) - 1) << 16;
477 reg |= (var->xres - 1);
478
479 writel(reg, base + SM501_OFF_DC_H_TOT);
480
481 /* program horizontal sync */
482
483 reg = var->hsync_len << 16;
484 reg |= var->xres + var->right_margin - 1;
485
486 writel(reg, base + SM501_OFF_DC_H_SYNC);
487
488 /* program vertical total */
489
490 reg = (v_total(var) - 1) << 16;
491 reg |= (var->yres - 1);
492
493 writel(reg, base + SM501_OFF_DC_V_TOT);
494
495 /* program vertical sync */
496 reg = var->vsync_len << 16;
497 reg |= var->yres + var->lower_margin - 1;
498
499 writel(reg, base + SM501_OFF_DC_V_SYNC);
500 }
501
502 /* sm501fb_pan_crt
503 *
504 * pan the CRT display output within an virtual framebuffer
505 */
506
507 static int sm501fb_pan_crt(struct fb_var_screeninfo *var,
508 struct fb_info *info)
509 {
510 struct sm501fb_par *par = info->par;
511 struct sm501fb_info *fbi = par->info;
512 unsigned int bytes_pixel = var->bits_per_pixel / 8;
513 unsigned long reg;
514 unsigned long xoffs;
515
516 xoffs = var->xoffset * bytes_pixel;
517
518 reg = readl(fbi->regs + SM501_DC_CRT_CONTROL);
519
520 reg &= ~SM501_DC_CRT_CONTROL_PIXEL_MASK;
521 reg |= ((xoffs & 15) / bytes_pixel) << 4;
522 writel(reg, fbi->regs + SM501_DC_CRT_CONTROL);
523
524 reg = (par->screen.sm_addr + xoffs +
525 var->yoffset * info->fix.line_length);
526 writel(reg | SM501_ADDR_FLIP, fbi->regs + SM501_DC_CRT_FB_ADDR);
527
528 sm501fb_sync_regs(fbi);
529 return 0;
530 }
531
532 /* sm501fb_pan_pnl
533 *
534 * pan the panel display output within an virtual framebuffer
535 */
536
537 static int sm501fb_pan_pnl(struct fb_var_screeninfo *var,
538 struct fb_info *info)
539 {
540 struct sm501fb_par *par = info->par;
541 struct sm501fb_info *fbi = par->info;
542 unsigned long reg;
543
544 reg = var->xoffset | (var->xres_virtual << 16);
545 writel(reg, fbi->regs + SM501_DC_PANEL_FB_WIDTH);
546
547 reg = var->yoffset | (var->yres_virtual << 16);
548 writel(reg, fbi->regs + SM501_DC_PANEL_FB_HEIGHT);
549
550 sm501fb_sync_regs(fbi);
551 return 0;
552 }
553
554 /* sm501fb_set_par_crt
555 *
556 * Set the CRT video mode from the fb_info structure
557 */
558
559 static int sm501fb_set_par_crt(struct fb_info *info)
560 {
561 struct sm501fb_par *par = info->par;
562 struct sm501fb_info *fbi = par->info;
563 struct fb_var_screeninfo *var = &info->var;
564 unsigned long control; /* control register */
565 int ret;
566
567 /* activate new configuration */
568
569 dev_dbg(fbi->dev, "%s(%p)\n", __func__, info);
570
571 /* enable CRT DAC - note 0 is on!*/
572 sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER);
573
574 control = readl(fbi->regs + SM501_DC_CRT_CONTROL);
575
576 control &= (SM501_DC_CRT_CONTROL_PIXEL_MASK |
577 SM501_DC_CRT_CONTROL_GAMMA |
578 SM501_DC_CRT_CONTROL_BLANK |
579 SM501_DC_CRT_CONTROL_SEL |
580 SM501_DC_CRT_CONTROL_CP |
581 SM501_DC_CRT_CONTROL_TVP);
582
583 /* set the sync polarities before we check data source */
584
585 if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0)
586 control |= SM501_DC_CRT_CONTROL_HSP;
587
588 if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0)
589 control |= SM501_DC_CRT_CONTROL_VSP;
590
591 if ((control & SM501_DC_CRT_CONTROL_SEL) == 0) {
592 /* the head is displaying panel data... */
593
594 sm501_alloc_mem(fbi, &par->screen, SM501_MEMF_CRT, 0);
595 goto out_update;
596 }
597
598 ret = sm501fb_set_par_common(info, var);
599 if (ret) {
600 dev_err(fbi->dev, "failed to set common parameters\n");
601 return ret;
602 }
603
604 sm501fb_pan_crt(var, info);
605 sm501fb_set_par_geometry(info, var);
606
607 control |= SM501_FIFO_3; /* fill if >3 free slots */
608
609 switch(var->bits_per_pixel) {
610 case 8:
611 control |= SM501_DC_CRT_CONTROL_8BPP;
612 break;
613
614 case 16:
615 control |= SM501_DC_CRT_CONTROL_16BPP;
616 break;
617
618 case 32:
619 control |= SM501_DC_CRT_CONTROL_32BPP;
620 sm501fb_setup_gamma(fbi, SM501_DC_CRT_PALETTE);
621 break;
622
623 default:
624 BUG();
625 }
626
627 control |= SM501_DC_CRT_CONTROL_SEL; /* CRT displays CRT data */
628 control |= SM501_DC_CRT_CONTROL_TE; /* enable CRT timing */
629 control |= SM501_DC_CRT_CONTROL_ENABLE; /* enable CRT plane */
630
631 out_update:
632 dev_dbg(fbi->dev, "new control is %08lx\n", control);
633
634 writel(control, fbi->regs + SM501_DC_CRT_CONTROL);
635 sm501fb_sync_regs(fbi);
636
637 return 0;
638 }
639
640 static void sm501fb_panel_power(struct sm501fb_info *fbi, int to)
641 {
642 unsigned long control;
643 void __iomem *ctrl_reg = fbi->regs + SM501_DC_PANEL_CONTROL;
644
645 control = readl(ctrl_reg);
646
647 if (to && (control & SM501_DC_PANEL_CONTROL_VDD) == 0) {
648 /* enable panel power */
649
650 control |= SM501_DC_PANEL_CONTROL_VDD; /* FPVDDEN */
651 writel(control, ctrl_reg);
652 sm501fb_sync_regs(fbi);
653 mdelay(10);
654
655 control |= SM501_DC_PANEL_CONTROL_DATA; /* DATA */
656 writel(control, ctrl_reg);
657 sm501fb_sync_regs(fbi);
658 mdelay(10);
659
660 control |= SM501_DC_PANEL_CONTROL_BIAS; /* VBIASEN */
661 writel(control, ctrl_reg);
662 sm501fb_sync_regs(fbi);
663 mdelay(10);
664
665 control |= SM501_DC_PANEL_CONTROL_FPEN;
666 writel(control, ctrl_reg);
667
668 } else if (!to && (control & SM501_DC_PANEL_CONTROL_VDD) != 0) {
669 /* disable panel power */
670
671 control &= ~SM501_DC_PANEL_CONTROL_FPEN;
672 writel(control, ctrl_reg);
673 sm501fb_sync_regs(fbi);
674 mdelay(10);
675
676 control &= ~SM501_DC_PANEL_CONTROL_BIAS;
677 writel(control, ctrl_reg);
678 sm501fb_sync_regs(fbi);
679 mdelay(10);
680
681 control &= ~SM501_DC_PANEL_CONTROL_DATA;
682 writel(control, ctrl_reg);
683 sm501fb_sync_regs(fbi);
684 mdelay(10);
685
686 control &= ~SM501_DC_PANEL_CONTROL_VDD;
687 writel(control, ctrl_reg);
688 sm501fb_sync_regs(fbi);
689 mdelay(10);
690 }
691
692 sm501fb_sync_regs(fbi);
693 }
694
695 /* sm501fb_set_par_pnl
696 *
697 * Set the panel video mode from the fb_info structure
698 */
699
700 static int sm501fb_set_par_pnl(struct fb_info *info)
701 {
702 struct sm501fb_par *par = info->par;
703 struct sm501fb_info *fbi = par->info;
704 struct fb_var_screeninfo *var = &info->var;
705 unsigned long control;
706 unsigned long reg;
707 int ret;
708
709 dev_dbg(fbi->dev, "%s(%p)\n", __func__, info);
710
711 /* activate this new configuration */
712
713 ret = sm501fb_set_par_common(info, var);
714 if (ret)
715 return ret;
716
717 sm501fb_pan_pnl(var, info);
718 sm501fb_set_par_geometry(info, var);
719
720 /* update control register */
721
722 control = readl(fbi->regs + SM501_DC_PANEL_CONTROL);
723 control &= (SM501_DC_PANEL_CONTROL_GAMMA |
724 SM501_DC_PANEL_CONTROL_VDD |
725 SM501_DC_PANEL_CONTROL_DATA |
726 SM501_DC_PANEL_CONTROL_BIAS |
727 SM501_DC_PANEL_CONTROL_FPEN |
728 SM501_DC_PANEL_CONTROL_CP |
729 SM501_DC_PANEL_CONTROL_CK |
730 SM501_DC_PANEL_CONTROL_HP |
731 SM501_DC_PANEL_CONTROL_VP |
732 SM501_DC_PANEL_CONTROL_HPD |
733 SM501_DC_PANEL_CONTROL_VPD);
734
735 control |= SM501_FIFO_3; /* fill if >3 free slots */
736
737 switch(var->bits_per_pixel) {
738 case 8:
739 control |= SM501_DC_PANEL_CONTROL_8BPP;
740 break;
741
742 case 16:
743 control |= SM501_DC_PANEL_CONTROL_16BPP;
744 break;
745
746 case 32:
747 control |= SM501_DC_PANEL_CONTROL_32BPP;
748 sm501fb_setup_gamma(fbi, SM501_DC_PANEL_PALETTE);
749 break;
750
751 default:
752 BUG();
753 }
754
755 writel(0x0, fbi->regs + SM501_DC_PANEL_PANNING_CONTROL);
756
757 /* panel plane top left and bottom right location */
758
759 writel(0x00, fbi->regs + SM501_DC_PANEL_TL_LOC);
760
761 reg = var->xres - 1;
762 reg |= (var->yres - 1) << 16;
763
764 writel(reg, fbi->regs + SM501_DC_PANEL_BR_LOC);
765
766 /* program panel control register */
767
768 control |= SM501_DC_PANEL_CONTROL_TE; /* enable PANEL timing */
769 control |= SM501_DC_PANEL_CONTROL_EN; /* enable PANEL gfx plane */
770
771 if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0)
772 control |= SM501_DC_PANEL_CONTROL_HSP;
773
774 if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0)
775 control |= SM501_DC_PANEL_CONTROL_VSP;
776
777 writel(control, fbi->regs + SM501_DC_PANEL_CONTROL);
778 sm501fb_sync_regs(fbi);
779
780 /* ensure the panel interface is not tristated at this point */
781
782 sm501_modify_reg(fbi->dev->parent, SM501_SYSTEM_CONTROL,
783 0, SM501_SYSCTRL_PANEL_TRISTATE);
784
785 /* power the panel up */
786 sm501fb_panel_power(fbi, 1);
787 return 0;
788 }
789
790
791 /* chan_to_field
792 *
793 * convert a colour value into a field position
794 *
795 * from pxafb.c
796 */
797
798 static inline unsigned int chan_to_field(unsigned int chan,
799 struct fb_bitfield *bf)
800 {
801 chan &= 0xffff;
802 chan >>= 16 - bf->length;
803 return chan << bf->offset;
804 }
805
806 /* sm501fb_setcolreg
807 *
808 * set the colour mapping for modes that support palettised data
809 */
810
811 static int sm501fb_setcolreg(unsigned regno,
812 unsigned red, unsigned green, unsigned blue,
813 unsigned transp, struct fb_info *info)
814 {
815 struct sm501fb_par *par = info->par;
816 struct sm501fb_info *fbi = par->info;
817 void __iomem *base = fbi->regs;
818 unsigned int val;
819
820 if (par->head == HEAD_CRT)
821 base += SM501_DC_CRT_PALETTE;
822 else
823 base += SM501_DC_PANEL_PALETTE;
824
825 switch (info->fix.visual) {
826 case FB_VISUAL_TRUECOLOR:
827 /* true-colour, use pseuo-palette */
828
829 if (regno < 16) {
830 u32 *pal = par->pseudo_palette;
831
832 val = chan_to_field(red, &info->var.red);
833 val |= chan_to_field(green, &info->var.green);
834 val |= chan_to_field(blue, &info->var.blue);
835
836 pal[regno] = val;
837 }
838 break;
839
840 case FB_VISUAL_PSEUDOCOLOR:
841 if (regno < 256) {
842 val = (red >> 8) << 16;
843 val |= (green >> 8) << 8;
844 val |= blue >> 8;
845
846 writel(val, base + (regno * 4));
847 }
848
849 break;
850
851 default:
852 return 1; /* unknown type */
853 }
854
855 return 0;
856 }
857
858 /* sm501fb_blank_pnl
859 *
860 * Blank or un-blank the panel interface
861 */
862
863 static int sm501fb_blank_pnl(int blank_mode, struct fb_info *info)
864 {
865 struct sm501fb_par *par = info->par;
866 struct sm501fb_info *fbi = par->info;
867
868 dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info);
869
870 switch (blank_mode) {
871 case FB_BLANK_POWERDOWN:
872 sm501fb_panel_power(fbi, 0);
873 break;
874
875 case FB_BLANK_UNBLANK:
876 sm501fb_panel_power(fbi, 1);
877 break;
878
879 case FB_BLANK_NORMAL:
880 case FB_BLANK_VSYNC_SUSPEND:
881 case FB_BLANK_HSYNC_SUSPEND:
882 default:
883 return 1;
884 }
885
886 return 0;
887 }
888
889 /* sm501fb_blank_crt
890 *
891 * Blank or un-blank the crt interface
892 */
893
894 static int sm501fb_blank_crt(int blank_mode, struct fb_info *info)
895 {
896 struct sm501fb_par *par = info->par;
897 struct sm501fb_info *fbi = par->info;
898 unsigned long ctrl;
899
900 dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info);
901
902 ctrl = readl(fbi->regs + SM501_DC_CRT_CONTROL);
903
904 switch (blank_mode) {
905 case FB_BLANK_POWERDOWN:
906 ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE;
907 sm501_misc_control(fbi->dev->parent, SM501_MISC_DAC_POWER, 0);
908
909 case FB_BLANK_NORMAL:
910 ctrl |= SM501_DC_CRT_CONTROL_BLANK;
911 break;
912
913 case FB_BLANK_UNBLANK:
914 ctrl &= ~SM501_DC_CRT_CONTROL_BLANK;
915 ctrl |= SM501_DC_CRT_CONTROL_ENABLE;
916 sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER);
917 break;
918
919 case FB_BLANK_VSYNC_SUSPEND:
920 case FB_BLANK_HSYNC_SUSPEND:
921 default:
922 return 1;
923
924 }
925
926 writel(ctrl, fbi->regs + SM501_DC_CRT_CONTROL);
927 sm501fb_sync_regs(fbi);
928
929 return 0;
930 }
931
932 /* sm501fb_cursor
933 *
934 * set or change the hardware cursor parameters
935 */
936
937 static int sm501fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
938 {
939 struct sm501fb_par *par = info->par;
940 struct sm501fb_info *fbi = par->info;
941 void __iomem *base = fbi->regs;
942 unsigned long hwc_addr;
943 unsigned long fg, bg;
944
945 dev_dbg(fbi->dev, "%s(%p,%p)\n", __func__, info, cursor);
946
947 if (par->head == HEAD_CRT)
948 base += SM501_DC_CRT_HWC_BASE;
949 else
950 base += SM501_DC_PANEL_HWC_BASE;
951
952 /* check not being asked to exceed capabilities */
953
954 if (cursor->image.width > 64)
955 return -EINVAL;
956
957 if (cursor->image.height > 64)
958 return -EINVAL;
959
960 if (cursor->image.depth > 1)
961 return -EINVAL;
962
963 hwc_addr = readl(base + SM501_OFF_HWC_ADDR);
964
965 if (cursor->enable)
966 writel(hwc_addr | SM501_HWC_EN, base + SM501_OFF_HWC_ADDR);
967 else
968 writel(hwc_addr & ~SM501_HWC_EN, base + SM501_OFF_HWC_ADDR);
969
970 /* set data */
971 if (cursor->set & FB_CUR_SETPOS) {
972 unsigned int x = cursor->image.dx;
973 unsigned int y = cursor->image.dy;
974
975 if (x >= 2048 || y >= 2048 )
976 return -EINVAL;
977
978 dev_dbg(fbi->dev, "set position %d,%d\n", x, y);
979
980 //y += cursor->image.height;
981
982 writel(x | (y << 16), base + SM501_OFF_HWC_LOC);
983 }
984
985 if (cursor->set & FB_CUR_SETCMAP) {
986 unsigned int bg_col = cursor->image.bg_color;
987 unsigned int fg_col = cursor->image.fg_color;
988
989 dev_dbg(fbi->dev, "%s: update cmap (%08x,%08x)\n",
990 __func__, bg_col, fg_col);
991
992 bg = ((info->cmap.red[bg_col] & 0xF8) << 8) |
993 ((info->cmap.green[bg_col] & 0xFC) << 3) |
994 ((info->cmap.blue[bg_col] & 0xF8) >> 3);
995
996 fg = ((info->cmap.red[fg_col] & 0xF8) << 8) |
997 ((info->cmap.green[fg_col] & 0xFC) << 3) |
998 ((info->cmap.blue[fg_col] & 0xF8) >> 3);
999
1000 dev_dbg(fbi->dev, "fgcol %08lx, bgcol %08lx\n", fg, bg);
1001
1002 writel(bg, base + SM501_OFF_HWC_COLOR_1_2);
1003 writel(fg, base + SM501_OFF_HWC_COLOR_3);
1004 }
1005
1006 if (cursor->set & FB_CUR_SETSIZE ||
1007 cursor->set & (FB_CUR_SETIMAGE | FB_CUR_SETSHAPE)) {
1008 /* SM501 cursor is a two bpp 64x64 bitmap this routine
1009 * clears it to transparent then combines the cursor
1010 * shape plane with the colour plane to set the
1011 * cursor */
1012 int x, y;
1013 const unsigned char *pcol = cursor->image.data;
1014 const unsigned char *pmsk = cursor->mask;
1015 void __iomem *dst = par->cursor.k_addr;
1016 unsigned char dcol = 0;
1017 unsigned char dmsk = 0;
1018 unsigned int op;
1019
1020 dev_dbg(fbi->dev, "%s: setting shape (%d,%d)\n",
1021 __func__, cursor->image.width, cursor->image.height);
1022
1023 for (op = 0; op < (64*64*2)/8; op+=4)
1024 writel(0x0, dst + op);
1025
1026 for (y = 0; y < cursor->image.height; y++) {
1027 for (x = 0; x < cursor->image.width; x++) {
1028 if ((x % 8) == 0) {
1029 dcol = *pcol++;
1030 dmsk = *pmsk++;
1031 } else {
1032 dcol >>= 1;
1033 dmsk >>= 1;
1034 }
1035
1036 if (dmsk & 1) {
1037 op = (dcol & 1) ? 1 : 3;
1038 op <<= ((x % 4) * 2);
1039
1040 op |= readb(dst + (x / 4));
1041 writeb(op, dst + (x / 4));
1042 }
1043 }
1044 dst += (64*2)/8;
1045 }
1046 }
1047
1048 sm501fb_sync_regs(fbi); /* ensure cursor data flushed */
1049 return 0;
1050 }
1051
1052 /* sm501fb_crtsrc_show
1053 *
1054 * device attribute code to show where the crt output is sourced from
1055 */
1056
1057 static ssize_t sm501fb_crtsrc_show(struct device *dev,
1058 struct device_attribute *attr, char *buf)
1059 {
1060 struct sm501fb_info *info = dev_get_drvdata(dev);
1061 unsigned long ctrl;
1062
1063 ctrl = readl(info->regs + SM501_DC_CRT_CONTROL);
1064 ctrl &= SM501_DC_CRT_CONTROL_SEL;
1065
1066 return snprintf(buf, PAGE_SIZE, "%s\n", ctrl ? "crt" : "panel");
1067 }
1068
1069 /* sm501fb_crtsrc_show
1070 *
1071 * device attribute code to set where the crt output is sourced from
1072 */
1073
1074 static ssize_t sm501fb_crtsrc_store(struct device *dev,
1075 struct device_attribute *attr,
1076 const char *buf, size_t len)
1077 {
1078 struct sm501fb_info *info = dev_get_drvdata(dev);
1079 enum sm501_controller head;
1080 unsigned long ctrl;
1081
1082 if (len < 1)
1083 return -EINVAL;
1084
1085 if (strnicmp(buf, "crt", 3) == 0)
1086 head = HEAD_CRT;
1087 else if (strnicmp(buf, "panel", 5) == 0)
1088 head = HEAD_PANEL;
1089 else
1090 return -EINVAL;
1091
1092 dev_info(dev, "setting crt source to head %d\n", head);
1093
1094 ctrl = readl(info->regs + SM501_DC_CRT_CONTROL);
1095
1096 if (head == HEAD_CRT) {
1097 ctrl |= SM501_DC_CRT_CONTROL_SEL;
1098 ctrl |= SM501_DC_CRT_CONTROL_ENABLE;
1099 ctrl |= SM501_DC_CRT_CONTROL_TE;
1100 } else {
1101 ctrl &= ~SM501_DC_CRT_CONTROL_SEL;
1102 ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE;
1103 ctrl &= ~SM501_DC_CRT_CONTROL_TE;
1104 }
1105
1106 writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1107 sm501fb_sync_regs(info);
1108
1109 return len;
1110 }
1111
1112 /* Prepare the device_attr for registration with sysfs later */
1113 static DEVICE_ATTR(crt_src, 0666, sm501fb_crtsrc_show, sm501fb_crtsrc_store);
1114
1115 /* sm501fb_show_regs
1116 *
1117 * show the primary sm501 registers
1118 */
1119 static int sm501fb_show_regs(struct sm501fb_info *info, char *ptr,
1120 unsigned int start, unsigned int len)
1121 {
1122 void __iomem *mem = info->regs;
1123 char *buf = ptr;
1124 unsigned int reg;
1125
1126 for (reg = start; reg < (len + start); reg += 4)
1127 ptr += sprintf(ptr, "%08x = %08x\n", reg, readl(mem + reg));
1128
1129 return ptr - buf;
1130 }
1131
1132 /* sm501fb_debug_show_crt
1133 *
1134 * show the crt control and cursor registers
1135 */
1136
1137 static ssize_t sm501fb_debug_show_crt(struct device *dev,
1138 struct device_attribute *attr, char *buf)
1139 {
1140 struct sm501fb_info *info = dev_get_drvdata(dev);
1141 char *ptr = buf;
1142
1143 ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_CONTROL, 0x40);
1144 ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_HWC_BASE, 0x10);
1145
1146 return ptr - buf;
1147 }
1148
1149 static DEVICE_ATTR(fbregs_crt, 0444, sm501fb_debug_show_crt, NULL);
1150
1151 /* sm501fb_debug_show_pnl
1152 *
1153 * show the panel control and cursor registers
1154 */
1155
1156 static ssize_t sm501fb_debug_show_pnl(struct device *dev,
1157 struct device_attribute *attr, char *buf)
1158 {
1159 struct sm501fb_info *info = dev_get_drvdata(dev);
1160 char *ptr = buf;
1161
1162 ptr += sm501fb_show_regs(info, ptr, 0x0, 0x40);
1163 ptr += sm501fb_show_regs(info, ptr, SM501_DC_PANEL_HWC_BASE, 0x10);
1164
1165 return ptr - buf;
1166 }
1167
1168 static DEVICE_ATTR(fbregs_pnl, 0444, sm501fb_debug_show_pnl, NULL);
1169
1170 /* framebuffer ops */
1171
1172 static struct fb_ops sm501fb_ops_crt = {
1173 .owner = THIS_MODULE,
1174 .fb_check_var = sm501fb_check_var_crt,
1175 .fb_set_par = sm501fb_set_par_crt,
1176 .fb_blank = sm501fb_blank_crt,
1177 .fb_setcolreg = sm501fb_setcolreg,
1178 .fb_pan_display = sm501fb_pan_crt,
1179 .fb_cursor = sm501fb_cursor,
1180 .fb_fillrect = cfb_fillrect,
1181 .fb_copyarea = cfb_copyarea,
1182 .fb_imageblit = cfb_imageblit,
1183 };
1184
1185 static struct fb_ops sm501fb_ops_pnl = {
1186 .owner = THIS_MODULE,
1187 .fb_check_var = sm501fb_check_var_pnl,
1188 .fb_set_par = sm501fb_set_par_pnl,
1189 .fb_pan_display = sm501fb_pan_pnl,
1190 .fb_blank = sm501fb_blank_pnl,
1191 .fb_setcolreg = sm501fb_setcolreg,
1192 .fb_cursor = sm501fb_cursor,
1193 .fb_fillrect = cfb_fillrect,
1194 .fb_copyarea = cfb_copyarea,
1195 .fb_imageblit = cfb_imageblit,
1196 };
1197
1198 /* sm501fb_info_alloc
1199 *
1200 * creates and initialises an sm501fb_info structure
1201 */
1202
1203 static struct sm501fb_info *sm501fb_info_alloc(struct fb_info *fbinfo_crt,
1204 struct fb_info *fbinfo_pnl)
1205 {
1206 struct sm501fb_info *info;
1207 struct sm501fb_par *par;
1208
1209 info = kzalloc(sizeof(struct sm501fb_info), GFP_KERNEL);
1210 if (info) {
1211 /* set the references back */
1212
1213 par = fbinfo_crt->par;
1214 par->info = info;
1215 par->head = HEAD_CRT;
1216 fbinfo_crt->pseudo_palette = &par->pseudo_palette;
1217
1218 par = fbinfo_pnl->par;
1219 par->info = info;
1220 par->head = HEAD_PANEL;
1221 fbinfo_pnl->pseudo_palette = &par->pseudo_palette;
1222
1223 /* store the two fbs into our info */
1224 info->fb[HEAD_CRT] = fbinfo_crt;
1225 info->fb[HEAD_PANEL] = fbinfo_pnl;
1226 }
1227
1228 return info;
1229 }
1230
1231 /* sm501_init_cursor
1232 *
1233 * initialise hw cursor parameters
1234 */
1235
1236 static int sm501_init_cursor(struct fb_info *fbi, unsigned int reg_base)
1237 {
1238 struct sm501fb_par *par = fbi->par;
1239 struct sm501fb_info *info = par->info;
1240 int ret;
1241
1242 par->cursor_regs = info->regs + reg_base;
1243
1244 ret = sm501_alloc_mem(info, &par->cursor, SM501_MEMF_CURSOR, 1024);
1245 if (ret < 0)
1246 return ret;
1247
1248 /* initialise the colour registers */
1249
1250 writel(par->cursor.sm_addr, par->cursor_regs + SM501_OFF_HWC_ADDR);
1251
1252 writel(0x00, par->cursor_regs + SM501_OFF_HWC_LOC);
1253 writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_1_2);
1254 writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_3);
1255 sm501fb_sync_regs(info);
1256
1257 return 0;
1258 }
1259
1260 /* sm501fb_info_start
1261 *
1262 * fills the par structure claiming resources and remapping etc.
1263 */
1264
1265 static int sm501fb_start(struct sm501fb_info *info,
1266 struct platform_device *pdev)
1267 {
1268 struct resource *res;
1269 struct device *dev;
1270 int ret;
1271
1272 info->dev = dev = &pdev->dev;
1273 platform_set_drvdata(pdev, info);
1274
1275 info->irq = ret = platform_get_irq(pdev, 0);
1276 if (ret < 0) {
1277 /* we currently do not use the IRQ */
1278 dev_warn(dev, "no irq for device\n");
1279 }
1280
1281 /* allocate, reserve and remap resources for registers */
1282 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1283 if (res == NULL) {
1284 dev_err(dev, "no resource definition for registers\n");
1285 ret = -ENOENT;
1286 goto err_release;
1287 }
1288
1289 info->regs_res = request_mem_region(res->start,
1290 res->end - res->start,
1291 pdev->name);
1292
1293 if (info->regs_res == NULL) {
1294 dev_err(dev, "cannot claim registers\n");
1295 ret = -ENXIO;
1296 goto err_release;
1297 }
1298
1299 info->regs = ioremap(res->start, (res->end - res->start)+1);
1300 if (info->regs == NULL) {
1301 dev_err(dev, "cannot remap registers\n");
1302 ret = -ENXIO;
1303 goto err_regs_res;
1304 }
1305
1306 /* allocate, reserve resources for framebuffer */
1307 res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
1308 if (res == NULL) {
1309 dev_err(dev, "no memory resource defined\n");
1310 ret = -ENXIO;
1311 goto err_regs_map;
1312 }
1313
1314 info->fbmem_res = request_mem_region(res->start,
1315 (res->end - res->start)+1,
1316 pdev->name);
1317 if (info->fbmem_res == NULL) {
1318 dev_err(dev, "cannot claim framebuffer\n");
1319 ret = -ENXIO;
1320 goto err_regs_map;
1321 }
1322
1323 info->fbmem = ioremap(res->start, (res->end - res->start)+1);
1324 if (info->fbmem == NULL) {
1325 dev_err(dev, "cannot remap framebuffer\n");
1326 goto err_mem_res;
1327 }
1328
1329 info->fbmem_len = (res->end - res->start)+1;
1330
1331 /* enable display controller */
1332 sm501_unit_power(dev->parent, SM501_GATE_DISPLAY, 1);
1333
1334 /* setup cursors */
1335
1336 sm501_init_cursor(info->fb[HEAD_CRT], SM501_DC_CRT_HWC_ADDR);
1337 sm501_init_cursor(info->fb[HEAD_PANEL], SM501_DC_PANEL_HWC_ADDR);
1338
1339 return 0; /* everything is setup */
1340
1341 err_mem_res:
1342 release_resource(info->fbmem_res);
1343 kfree(info->fbmem_res);
1344
1345 err_regs_map:
1346 iounmap(info->regs);
1347
1348 err_regs_res:
1349 release_resource(info->regs_res);
1350 kfree(info->regs_res);
1351
1352 err_release:
1353 return ret;
1354 }
1355
1356 static void sm501fb_stop(struct sm501fb_info *info)
1357 {
1358 /* disable display controller */
1359 sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0);
1360
1361 iounmap(info->fbmem);
1362 release_resource(info->fbmem_res);
1363 kfree(info->fbmem_res);
1364
1365 iounmap(info->regs);
1366 release_resource(info->regs_res);
1367 kfree(info->regs_res);
1368 }
1369
1370 static void sm501fb_info_release(struct sm501fb_info *info)
1371 {
1372 kfree(info);
1373 }
1374
1375 static int sm501fb_init_fb(struct fb_info *fb,
1376 enum sm501_controller head,
1377 const char *fbname)
1378 {
1379 struct sm501_platdata_fbsub *pd;
1380 struct sm501fb_par *par = fb->par;
1381 struct sm501fb_info *info = par->info;
1382 unsigned long ctrl;
1383 unsigned int enable;
1384 int ret;
1385
1386 switch (head) {
1387 case HEAD_CRT:
1388 pd = info->pdata->fb_crt;
1389 ctrl = readl(info->regs + SM501_DC_CRT_CONTROL);
1390 enable = (ctrl & SM501_DC_CRT_CONTROL_ENABLE) ? 1 : 0;
1391
1392 /* ensure we set the correct source register */
1393 if (info->pdata->fb_route != SM501_FB_CRT_PANEL) {
1394 ctrl |= SM501_DC_CRT_CONTROL_SEL;
1395 writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1396 }
1397
1398 break;
1399
1400 case HEAD_PANEL:
1401 pd = info->pdata->fb_pnl;
1402 ctrl = readl(info->regs + SM501_DC_PANEL_CONTROL);
1403 enable = (ctrl & SM501_DC_PANEL_CONTROL_EN) ? 1 : 0;
1404 break;
1405
1406 default:
1407 pd = NULL; /* stop compiler warnings */
1408 ctrl = 0;
1409 enable = 0;
1410 BUG();
1411 }
1412
1413 dev_info(info->dev, "fb %s %sabled at start\n",
1414 fbname, enable ? "en" : "dis");
1415
1416 /* check to see if our routing allows this */
1417
1418 if (head == HEAD_CRT && info->pdata->fb_route == SM501_FB_CRT_PANEL) {
1419 ctrl &= ~SM501_DC_CRT_CONTROL_SEL;
1420 writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1421 enable = 0;
1422 }
1423
1424 strlcpy(fb->fix.id, fbname, sizeof(fb->fix.id));
1425
1426 memcpy(&par->ops,
1427 (head == HEAD_CRT) ? &sm501fb_ops_crt : &sm501fb_ops_pnl,
1428 sizeof(struct fb_ops));
1429
1430 /* update ops dependant on what we've been passed */
1431
1432 if ((pd->flags & SM501FB_FLAG_USE_HWCURSOR) == 0)
1433 par->ops.fb_cursor = NULL;
1434
1435 fb->fbops = &par->ops;
1436 fb->flags = FBINFO_FLAG_DEFAULT |
1437 FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN;
1438
1439 /* fixed data */
1440
1441 fb->fix.type = FB_TYPE_PACKED_PIXELS;
1442 fb->fix.type_aux = 0;
1443 fb->fix.xpanstep = 1;
1444 fb->fix.ypanstep = 1;
1445 fb->fix.ywrapstep = 0;
1446 fb->fix.accel = FB_ACCEL_NONE;
1447
1448 /* screenmode */
1449
1450 fb->var.nonstd = 0;
1451 fb->var.activate = FB_ACTIVATE_NOW;
1452 fb->var.accel_flags = 0;
1453 fb->var.vmode = FB_VMODE_NONINTERLACED;
1454 fb->var.bits_per_pixel = 16;
1455
1456 if (enable && (pd->flags & SM501FB_FLAG_USE_INIT_MODE) && 0) {
1457 /* TODO read the mode from the current display */
1458
1459 } else {
1460 if (pd->def_mode) {
1461 dev_info(info->dev, "using supplied mode\n");
1462 fb_videomode_to_var(&fb->var, pd->def_mode);
1463
1464 fb->var.bits_per_pixel = pd->def_bpp ? pd->def_bpp : 8;
1465 fb->var.xres_virtual = fb->var.xres;
1466 fb->var.yres_virtual = fb->var.yres;
1467 } else {
1468 ret = fb_find_mode(&fb->var, fb,
1469 NULL, NULL, 0, NULL, 8);
1470
1471 if (ret == 0 || ret == 4) {
1472 dev_err(info->dev,
1473 "failed to get initial mode\n");
1474 return -EINVAL;
1475 }
1476 }
1477 }
1478
1479 /* initialise and set the palette */
1480 fb_alloc_cmap(&fb->cmap, NR_PALETTE, 0);
1481 fb_set_cmap(&fb->cmap, fb);
1482
1483 ret = (fb->fbops->fb_check_var)(&fb->var, fb);
1484 if (ret)
1485 dev_err(info->dev, "check_var() failed on initial setup?\n");
1486
1487 /* ensure we've activated our new configuration */
1488 (fb->fbops->fb_set_par)(fb);
1489
1490 return 0;
1491 }
1492
1493 /* default platform data if none is supplied (ie, PCI device) */
1494
1495 static struct sm501_platdata_fbsub sm501fb_pdata_crt = {
1496 .flags = (SM501FB_FLAG_USE_INIT_MODE |
1497 SM501FB_FLAG_USE_HWCURSOR |
1498 SM501FB_FLAG_USE_HWACCEL |
1499 SM501FB_FLAG_DISABLE_AT_EXIT),
1500
1501 };
1502
1503 static struct sm501_platdata_fbsub sm501fb_pdata_pnl = {
1504 .flags = (SM501FB_FLAG_USE_INIT_MODE |
1505 SM501FB_FLAG_USE_HWCURSOR |
1506 SM501FB_FLAG_USE_HWACCEL |
1507 SM501FB_FLAG_DISABLE_AT_EXIT),
1508 };
1509
1510 static struct sm501_platdata_fb sm501fb_def_pdata = {
1511 .fb_route = SM501_FB_OWN,
1512 .fb_crt = &sm501fb_pdata_crt,
1513 .fb_pnl = &sm501fb_pdata_pnl,
1514 };
1515
1516 static char driver_name_crt[] = "sm501fb-crt";
1517 static char driver_name_pnl[] = "sm501fb-panel";
1518
1519 static int __init sm501fb_probe(struct platform_device *pdev)
1520 {
1521 struct sm501fb_info *info;
1522 struct device *dev = &pdev->dev;
1523 struct fb_info *fbinfo_crt;
1524 struct fb_info *fbinfo_pnl;
1525 int ret;
1526
1527 /* allocate our framebuffers */
1528
1529 fbinfo_crt = framebuffer_alloc(sizeof(struct sm501fb_par), dev);
1530 if (fbinfo_crt == NULL) {
1531 dev_err(dev, "cannot allocate crt framebuffer\n");
1532 return -ENOMEM;
1533 }
1534
1535 fbinfo_pnl = framebuffer_alloc(sizeof(struct sm501fb_par), dev);
1536 if (fbinfo_pnl == NULL) {
1537 dev_err(dev, "cannot allocate panel framebuffer\n");
1538 ret = -ENOMEM;
1539 goto fbinfo_crt_alloc_fail;
1540 }
1541
1542 info = sm501fb_info_alloc(fbinfo_crt, fbinfo_pnl);
1543 if (info == NULL) {
1544 dev_err(dev, "cannot allocate par\n");
1545 ret = -ENOMEM;
1546 goto sm501fb_alloc_fail;
1547 }
1548
1549 if (dev->parent->platform_data) {
1550 struct sm501_platdata *pd = dev->parent->platform_data;
1551 info->pdata = pd->fb;
1552 }
1553
1554 if (info->pdata == NULL) {
1555 dev_info(dev, "using default configuration data\n");
1556 info->pdata = &sm501fb_def_pdata;
1557 }
1558
1559 /* start the framebuffers */
1560
1561 ret = sm501fb_start(info, pdev);
1562 if (ret) {
1563 dev_err(dev, "cannot initialise SM501\n");
1564 goto sm501fb_start_fail;
1565 }
1566
1567 /* CRT framebuffer setup */
1568
1569 ret = sm501fb_init_fb(fbinfo_crt, HEAD_CRT, driver_name_crt);
1570 if (ret) {
1571 dev_err(dev, "cannot initialise CRT fb\n");
1572 goto sm501fb_start_fail;
1573 }
1574
1575 /* Panel framebuffer setup */
1576
1577 ret = sm501fb_init_fb(fbinfo_pnl, HEAD_PANEL, driver_name_pnl);
1578 if (ret) {
1579 dev_err(dev, "cannot initialise Panel fb\n");
1580 goto sm501fb_start_fail;
1581 }
1582
1583 /* register framebuffers */
1584
1585 ret = register_framebuffer(fbinfo_crt);
1586 if (ret < 0) {
1587 dev_err(dev, "failed to register CRT fb (%d)\n", ret);
1588 goto register_crt_fail;
1589 }
1590
1591 ret = register_framebuffer(fbinfo_pnl);
1592 if (ret < 0) {
1593 dev_err(dev, "failed to register panel fb (%d)\n", ret);
1594 goto register_pnl_fail;
1595 }
1596
1597 dev_info(dev, "fb%d: %s frame buffer device\n",
1598 fbinfo_crt->node, fbinfo_crt->fix.id);
1599
1600 dev_info(dev, "fb%d: %s frame buffer device\n",
1601 fbinfo_pnl->node, fbinfo_pnl->fix.id);
1602
1603 /* create device files */
1604
1605 ret = device_create_file(dev, &dev_attr_crt_src);
1606 if (ret)
1607 goto crtsrc_fail;
1608
1609 ret = device_create_file(dev, &dev_attr_fbregs_pnl);
1610 if (ret)
1611 goto fbregs_pnl_fail;
1612
1613 ret = device_create_file(dev, &dev_attr_fbregs_crt);
1614 if (ret)
1615 goto fbregs_crt_fail;
1616
1617 /* we registered, return ok */
1618 return 0;
1619
1620 fbregs_crt_fail:
1621 device_remove_file(dev, &dev_attr_fbregs_pnl);
1622
1623 fbregs_pnl_fail:
1624 device_remove_file(dev, &dev_attr_crt_src);
1625
1626 crtsrc_fail:
1627 unregister_framebuffer(fbinfo_pnl);
1628
1629 register_pnl_fail:
1630 unregister_framebuffer(fbinfo_crt);
1631
1632 register_crt_fail:
1633 sm501fb_stop(info);
1634
1635 sm501fb_start_fail:
1636 sm501fb_info_release(info);
1637
1638 sm501fb_alloc_fail:
1639 framebuffer_release(fbinfo_pnl);
1640
1641 fbinfo_crt_alloc_fail:
1642 framebuffer_release(fbinfo_crt);
1643
1644 return ret;
1645 }
1646
1647
1648 /*
1649 * Cleanup
1650 */
1651 static int sm501fb_remove(struct platform_device *pdev)
1652 {
1653 struct sm501fb_info *info = platform_get_drvdata(pdev);
1654 struct fb_info *fbinfo_crt = info->fb[0];
1655 struct fb_info *fbinfo_pnl = info->fb[1];
1656
1657 device_remove_file(&pdev->dev, &dev_attr_fbregs_crt);
1658 device_remove_file(&pdev->dev, &dev_attr_fbregs_pnl);
1659 device_remove_file(&pdev->dev, &dev_attr_crt_src);
1660
1661 unregister_framebuffer(fbinfo_crt);
1662 unregister_framebuffer(fbinfo_pnl);
1663
1664 sm501fb_stop(info);
1665 sm501fb_info_release(info);
1666
1667 framebuffer_release(fbinfo_pnl);
1668 framebuffer_release(fbinfo_crt);
1669
1670 return 0;
1671 }
1672
1673 #ifdef CONFIG_PM
1674
1675 static int sm501fb_suspend_fb(struct sm501fb_info *info,
1676 enum sm501_controller head)
1677 {
1678 struct fb_info *fbi = info->fb[head];
1679 struct sm501fb_par *par = fbi->par;
1680
1681 if (par->screen.size == 0)
1682 return 0;
1683
1684 /* backup copies in case chip is powered down over suspend */
1685
1686 par->store_fb = vmalloc(par->screen.size);
1687 if (par->store_fb == NULL) {
1688 dev_err(info->dev, "no memory to store screen\n");
1689 return -ENOMEM;
1690 }
1691
1692 par->store_cursor = vmalloc(par->cursor.size);
1693 if (par->store_cursor == NULL) {
1694 dev_err(info->dev, "no memory to store cursor\n");
1695 goto err_nocursor;
1696 }
1697
1698 dev_dbg(info->dev, "suspending screen to %p\n", par->store_fb);
1699 dev_dbg(info->dev, "suspending cursor to %p\n", par->store_cursor);
1700
1701 memcpy_fromio(par->store_fb, par->screen.k_addr, par->screen.size);
1702 memcpy_fromio(par->store_cursor, par->cursor.k_addr, par->cursor.size);
1703 /* blank the relevant interface to ensure unit power minimised */
1704 (par->ops.fb_blank)(FB_BLANK_POWERDOWN, fbi);
1705
1706 acquire_console_sem();
1707 fb_set_suspend(fbi, 1);
1708 release_console_sem();
1709
1710 return 0;
1711
1712 err_nocursor:
1713 vfree(par->store_fb);
1714 par->store_fb = NULL;
1715
1716 return -ENOMEM;
1717 }
1718
1719 static void sm501fb_resume_fb(struct sm501fb_info *info,
1720 enum sm501_controller head)
1721 {
1722 struct fb_info *fbi = info->fb[head];
1723 struct sm501fb_par *par = fbi->par;
1724
1725 if (par->screen.size == 0)
1726 return;
1727
1728 /* re-activate the configuration */
1729
1730 (par->ops.fb_set_par)(fbi);
1731
1732 /* restore the data */
1733
1734 dev_dbg(info->dev, "restoring screen from %p\n", par->store_fb);
1735 dev_dbg(info->dev, "restoring cursor from %p\n", par->store_cursor);
1736
1737 if (par->store_fb)
1738 memcpy_toio(par->screen.k_addr, par->store_fb,
1739 par->screen.size);
1740
1741 if (par->store_cursor)
1742 memcpy_toio(par->cursor.k_addr, par->store_cursor,
1743 par->cursor.size);
1744
1745 acquire_console_sem();
1746 fb_set_suspend(fbi, 0);
1747 release_console_sem();
1748
1749 vfree(par->store_fb);
1750 vfree(par->store_cursor);
1751 }
1752
1753
1754 /* suspend and resume support */
1755
1756 static int sm501fb_suspend(struct platform_device *pdev, pm_message_t state)
1757 {
1758 struct sm501fb_info *info = platform_get_drvdata(pdev);
1759
1760 /* store crt control to resume with */
1761 info->pm_crt_ctrl = readl(info->regs + SM501_DC_CRT_CONTROL);
1762
1763 sm501fb_suspend_fb(info, HEAD_CRT);
1764 sm501fb_suspend_fb(info, HEAD_PANEL);
1765
1766 /* turn off the clocks, in case the device is not powered down */
1767 sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0);
1768
1769 return 0;
1770 }
1771
1772 #define SM501_CRT_CTRL_SAVE (SM501_DC_CRT_CONTROL_TVP | \
1773 SM501_DC_CRT_CONTROL_SEL)
1774
1775
1776 static int sm501fb_resume(struct platform_device *pdev)
1777 {
1778 struct sm501fb_info *info = platform_get_drvdata(pdev);
1779 unsigned long crt_ctrl;
1780
1781 sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 1);
1782
1783 /* restore the items we want to be saved for crt control */
1784
1785 crt_ctrl = readl(info->regs + SM501_DC_CRT_CONTROL);
1786 crt_ctrl &= ~SM501_CRT_CTRL_SAVE;
1787 crt_ctrl |= info->pm_crt_ctrl & SM501_CRT_CTRL_SAVE;
1788 writel(crt_ctrl, info->regs + SM501_DC_CRT_CONTROL);
1789
1790 sm501fb_resume_fb(info, HEAD_CRT);
1791 sm501fb_resume_fb(info, HEAD_PANEL);
1792
1793 return 0;
1794 }
1795
1796 #else
1797 #define sm501fb_suspend NULL
1798 #define sm501fb_resume NULL
1799 #endif
1800
1801 static struct platform_driver sm501fb_driver = {
1802 .probe = sm501fb_probe,
1803 .remove = sm501fb_remove,
1804 .suspend = sm501fb_suspend,
1805 .resume = sm501fb_resume,
1806 .driver = {
1807 .name = "sm501-fb",
1808 .owner = THIS_MODULE,
1809 },
1810 };
1811
1812 static int __devinit sm501fb_init(void)
1813 {
1814 return platform_driver_register(&sm501fb_driver);
1815 }
1816
1817 static void __exit sm501fb_cleanup(void)
1818 {
1819 platform_driver_unregister(&sm501fb_driver);
1820 }
1821
1822 module_init(sm501fb_init);
1823 module_exit(sm501fb_cleanup);
1824
1825 MODULE_AUTHOR("Ben Dooks, Vincent Sanders");
1826 MODULE_DESCRIPTION("SM501 Framebuffer driver");
1827 MODULE_LICENSE("GPL v2");
kernel-based virtual machine