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Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / video / sm501fb.c
blob35370d0ecf037ccb92d5f9136e46f1e1f4d7e683
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 #include <linux/io.h>
33
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 address.
52 *
53 * This structure is used to track memory usage within the SM501 framebuffer
54 * allocation. The sm_addr field is stored as an offset as it is often used
55 * against both the physical and mapped addresses.
56 */
57 struct sm501_mem {
58 unsigned long size;
59 unsigned long sm_addr; /* offset from base of sm501 fb. */
60 void __iomem *k_addr;
61 };
62
63 /* private data that is shared between all frambuffers* */
64 struct sm501fb_info {
65 struct device *dev;
66 struct fb_info *fb[2]; /* fb info for both heads */
67 struct resource *fbmem_res; /* framebuffer resource */
68 struct resource *regs_res; /* registers resource */
69 struct resource *regs2d_res; /* 2d registers resource */
70 struct sm501_platdata_fb *pdata; /* our platform data */
71
72 unsigned long pm_crt_ctrl; /* pm: crt ctrl save */
73
74 int irq;
75 int swap_endian; /* set to swap rgb=>bgr */
76 void __iomem *regs; /* remapped registers */
77 void __iomem *regs2d; /* 2d remapped registers */
78 void __iomem *fbmem; /* remapped framebuffer */
79 size_t fbmem_len; /* length of remapped region */
80 };
81
82 /* per-framebuffer private data */
83 struct sm501fb_par {
84 u32 pseudo_palette[16];
85
86 enum sm501_controller head;
87 struct sm501_mem cursor;
88 struct sm501_mem screen;
89 struct fb_ops ops;
90
91 void *store_fb;
92 void *store_cursor;
93 void __iomem *cursor_regs;
94 struct sm501fb_info *info;
95 };
96
97 /* Helper functions */
98
99 static inline int h_total(struct fb_var_screeninfo *var)
100 {
101 return var->xres + var->left_margin +
102 var->right_margin + var->hsync_len;
103 }
104
105 static inline int v_total(struct fb_var_screeninfo *var)
106 {
107 return var->yres + var->upper_margin +
108 var->lower_margin + var->vsync_len;
109 }
110
111 /* sm501fb_sync_regs()
112 *
113 * This call is mainly for PCI bus systems where we need to
114 * ensure that any writes to the bus are completed before the
115 * next phase, or after completing a function.
116 */
117
118 static inline void sm501fb_sync_regs(struct sm501fb_info *info)
119 {
120 readl(info->regs);
121 }
122
123 /* sm501_alloc_mem
124 *
125 * This is an attempt to lay out memory for the two framebuffers and
126 * everything else
127 *
128 * |fbmem_res->start fbmem_res->end|
129 * | |
130 * |fb[0].fix.smem_start | |fb[1].fix.smem_start | 2K |
131 * |-> fb[0].fix.smem_len <-| spare |-> fb[1].fix.smem_len <-|-> cursors <-|
132 *
133 * The "spare" space is for the 2d engine data
134 * the fixed is space for the cursors (2x1Kbyte)
135 *
136 * we need to allocate memory for the 2D acceleration engine
137 * command list and the data for the engine to deal with.
138 *
139 * - all allocations must be 128bit aligned
140 * - cursors are 64x64x2 bits (1Kbyte)
141 *
142 */
143
144 #define SM501_MEMF_CURSOR (1)
145 #define SM501_MEMF_PANEL (2)
146 #define SM501_MEMF_CRT (4)
147 #define SM501_MEMF_ACCEL (8)
148
149 static int sm501_alloc_mem(struct sm501fb_info *inf, struct sm501_mem *mem,
150 unsigned int why, size_t size, u32 smem_len)
151 {
152 struct sm501fb_par *par;
153 struct fb_info *fbi;
154 unsigned int ptr;
155 unsigned int end;
156
157 switch (why) {
158 case SM501_MEMF_CURSOR:
159 ptr = inf->fbmem_len - size;
160 inf->fbmem_len = ptr; /* adjust available memory. */
161 break;
162
163 case SM501_MEMF_PANEL:
164 if (size > inf->fbmem_len)
165 return -ENOMEM;
166
167 ptr = inf->fbmem_len - size;
168 fbi = inf->fb[HEAD_CRT];
169
170 /* round down, some programs such as directfb do not draw
171 * 0,0 correctly unless the start is aligned to a page start.
172 */
173
174 if (ptr > 0)
175 ptr &= ~(PAGE_SIZE - 1);
176
177 if (fbi && ptr < smem_len)
178 return -ENOMEM;
179
180 break;
181
182 case SM501_MEMF_CRT:
183 ptr = 0;
184
185 /* check to see if we have panel memory allocated
186 * which would put an limit on available memory. */
187
188 fbi = inf->fb[HEAD_PANEL];
189 if (fbi) {
190 par = fbi->par;
191 end = par->screen.k_addr ? par->screen.sm_addr : inf->fbmem_len;
192 } else
193 end = inf->fbmem_len;
194
195 if ((ptr + size) > end)
196 return -ENOMEM;
197
198 break;
199
200 case SM501_MEMF_ACCEL:
201 fbi = inf->fb[HEAD_CRT];
202 ptr = fbi ? smem_len : 0;
203
204 fbi = inf->fb[HEAD_PANEL];
205 if (fbi) {
206 par = fbi->par;
207 end = par->screen.sm_addr;
208 } else
209 end = inf->fbmem_len;
210
211 if ((ptr + size) > end)
212 return -ENOMEM;
213
214 break;
215
216 default:
217 return -EINVAL;
218 }
219
220 mem->size = size;
221 mem->sm_addr = ptr;
222 mem->k_addr = inf->fbmem + ptr;
223
224 dev_dbg(inf->dev, "%s: result %08lx, %p - %u, %zd\n",
225 __func__, mem->sm_addr, mem->k_addr, why, size);
226
227 return 0;
228 }
229
230 /* sm501fb_ps_to_hz
231 *
232 * Converts a period in picoseconds to Hz.
233 *
234 * Note, we try to keep this in Hz to minimise rounding with
235 * the limited PLL settings on the SM501.
236 */
237
238 static unsigned long sm501fb_ps_to_hz(unsigned long psvalue)
239 {
240 unsigned long long numerator=1000000000000ULL;
241
242 /* 10^12 / picosecond period gives frequency in Hz */
243 do_div(numerator, psvalue);
244 return (unsigned long)numerator;
245 }
246
247 /* sm501fb_hz_to_ps is identical to the oposite transform */
248
249 #define sm501fb_hz_to_ps(x) sm501fb_ps_to_hz(x)
250
251 /* sm501fb_setup_gamma
252 *
253 * Programs a linear 1.0 gamma ramp in case the gamma
254 * correction is enabled without programming anything else.
255 */
256
257 static void sm501fb_setup_gamma(struct sm501fb_info *fbi,
258 unsigned long palette)
259 {
260 unsigned long value = 0;
261 int offset;
262
263 /* set gamma values */
264 for (offset = 0; offset < 256 * 4; offset += 4) {
265 writel(value, fbi->regs + palette + offset);
266 value += 0x010101; /* Advance RGB by 1,1,1.*/
267 }
268 }
269
270 /* sm501fb_check_var
271 *
272 * check common variables for both panel and crt
273 */
274
275 static int sm501fb_check_var(struct fb_var_screeninfo *var,
276 struct fb_info *info)
277 {
278 struct sm501fb_par *par = info->par;
279 struct sm501fb_info *sm = par->info;
280 unsigned long tmp;
281
282 /* check we can fit these values into the registers */
283
284 if (var->hsync_len > 255 || var->vsync_len > 63)
285 return -EINVAL;
286
287 /* hdisplay end and hsync start */
288 if ((var->xres + var->right_margin) > 4096)
289 return -EINVAL;
290
291 /* vdisplay end and vsync start */
292 if ((var->yres + var->lower_margin) > 2048)
293 return -EINVAL;
294
295 /* hard limits of device */
296
297 if (h_total(var) > 4096 || v_total(var) > 2048)
298 return -EINVAL;
299
300 /* check our line length is going to be 128 bit aligned */
301
302 tmp = (var->xres * var->bits_per_pixel) / 8;
303 if ((tmp & 15) != 0)
304 return -EINVAL;
305
306 /* check the virtual size */
307
308 if (var->xres_virtual > 4096 || var->yres_virtual > 2048)
309 return -EINVAL;
310
311 /* can cope with 8,16 or 32bpp */
312
313 if (var->bits_per_pixel <= 8)
314 var->bits_per_pixel = 8;
315 else if (var->bits_per_pixel <= 16)
316 var->bits_per_pixel = 16;
317 else if (var->bits_per_pixel == 24)
318 var->bits_per_pixel = 32;
319
320 /* set r/g/b positions and validate bpp */
321 switch(var->bits_per_pixel) {
322 case 8:
323 var->red.length = var->bits_per_pixel;
324 var->red.offset = 0;
325 var->green.length = var->bits_per_pixel;
326 var->green.offset = 0;
327 var->blue.length = var->bits_per_pixel;
328 var->blue.offset = 0;
329 var->transp.length = 0;
330 var->transp.offset = 0;
331
332 break;
333
334 case 16:
335 if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) {
336 var->blue.offset = 11;
337 var->green.offset = 5;
338 var->red.offset = 0;
339 } else {
340 var->red.offset = 11;
341 var->green.offset = 5;
342 var->blue.offset = 0;
343 }
344 var->transp.offset = 0;
345
346 var->red.length = 5;
347 var->green.length = 6;
348 var->blue.length = 5;
349 var->transp.length = 0;
350 break;
351
352 case 32:
353 if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) {
354 var->transp.offset = 0;
355 var->red.offset = 8;
356 var->green.offset = 16;
357 var->blue.offset = 24;
358 } else {
359 var->transp.offset = 24;
360 var->red.offset = 16;
361 var->green.offset = 8;
362 var->blue.offset = 0;
363 }
364
365 var->red.length = 8;
366 var->green.length = 8;
367 var->blue.length = 8;
368 var->transp.length = 0;
369 break;
370
371 default:
372 return -EINVAL;
373 }
374
375 return 0;
376 }
377
378 /*
379 * sm501fb_check_var_crt():
380 *
381 * check the parameters for the CRT head, and either bring them
382 * back into range, or return -EINVAL.
383 */
384
385 static int sm501fb_check_var_crt(struct fb_var_screeninfo *var,
386 struct fb_info *info)
387 {
388 return sm501fb_check_var(var, info);
389 }
390
391 /* sm501fb_check_var_pnl():
392 *
393 * check the parameters for the CRT head, and either bring them
394 * back into range, or return -EINVAL.
395 */
396
397 static int sm501fb_check_var_pnl(struct fb_var_screeninfo *var,
398 struct fb_info *info)
399 {
400 return sm501fb_check_var(var, info);
401 }
402
403 /* sm501fb_set_par_common
404 *
405 * set common registers for framebuffers
406 */
407
408 static int sm501fb_set_par_common(struct fb_info *info,
409 struct fb_var_screeninfo *var)
410 {
411 struct sm501fb_par *par = info->par;
412 struct sm501fb_info *fbi = par->info;
413 unsigned long pixclock; /* pixelclock in Hz */
414 unsigned long sm501pixclock; /* pixelclock the 501 can achive in Hz */
415 unsigned int mem_type;
416 unsigned int clock_type;
417 unsigned int head_addr;
418 unsigned int smem_len;
419
420 dev_dbg(fbi->dev, "%s: %dx%d, bpp = %d, virtual %dx%d\n",
421 __func__, var->xres, var->yres, var->bits_per_pixel,
422 var->xres_virtual, var->yres_virtual);
423
424 switch (par->head) {
425 case HEAD_CRT:
426 mem_type = SM501_MEMF_CRT;
427 clock_type = SM501_CLOCK_V2XCLK;
428 head_addr = SM501_DC_CRT_FB_ADDR;
429 break;
430
431 case HEAD_PANEL:
432 mem_type = SM501_MEMF_PANEL;
433 clock_type = SM501_CLOCK_P2XCLK;
434 head_addr = SM501_DC_PANEL_FB_ADDR;
435 break;
436
437 default:
438 mem_type = 0; /* stop compiler warnings */
439 head_addr = 0;
440 clock_type = 0;
441 }
442
443 switch (var->bits_per_pixel) {
444 case 8:
445 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
446 break;
447
448 case 16:
449 info->fix.visual = FB_VISUAL_TRUECOLOR;
450 break;
451
452 case 32:
453 info->fix.visual = FB_VISUAL_TRUECOLOR;
454 break;
455 }
456
457 /* allocate fb memory within 501 */
458 info->fix.line_length = (var->xres_virtual * var->bits_per_pixel)/8;
459 smem_len = info->fix.line_length * var->yres_virtual;
460
461 dev_dbg(fbi->dev, "%s: line length = %u\n", __func__,
462 info->fix.line_length);
463
464 if (sm501_alloc_mem(fbi, &par->screen, mem_type, smem_len, smem_len)) {
465 dev_err(fbi->dev, "no memory available\n");
466 return -ENOMEM;
467 }
468
469 mutex_lock(&info->mm_lock);
470 info->fix.smem_start = fbi->fbmem_res->start + par->screen.sm_addr;
471 info->fix.smem_len = smem_len;
472 mutex_unlock(&info->mm_lock);
473
474 info->screen_base = fbi->fbmem + par->screen.sm_addr;
475 info->screen_size = info->fix.smem_len;
476
477 /* set start of framebuffer to the screen */
478
479 writel(par->screen.sm_addr | SM501_ADDR_FLIP, fbi->regs + head_addr);
480
481 /* program CRT clock */
482
483 pixclock = sm501fb_ps_to_hz(var->pixclock);
484
485 sm501pixclock = sm501_set_clock(fbi->dev->parent, clock_type,
486 pixclock);
487
488 /* update fb layer with actual clock used */
489 var->pixclock = sm501fb_hz_to_ps(sm501pixclock);
490
491 dev_dbg(fbi->dev, "%s: pixclock(ps) = %u, pixclock(Hz) = %lu, "
492 "sm501pixclock = %lu, error = %ld%%\n",
493 __func__, var->pixclock, pixclock, sm501pixclock,
494 ((pixclock - sm501pixclock)*100)/pixclock);
495
496 return 0;
497 }
498
499 /* sm501fb_set_par_geometry
500 *
501 * set the geometry registers for specified framebuffer.
502 */
503
504 static void sm501fb_set_par_geometry(struct fb_info *info,
505 struct fb_var_screeninfo *var)
506 {
507 struct sm501fb_par *par = info->par;
508 struct sm501fb_info *fbi = par->info;
509 void __iomem *base = fbi->regs;
510 unsigned long reg;
511
512 if (par->head == HEAD_CRT)
513 base += SM501_DC_CRT_H_TOT;
514 else
515 base += SM501_DC_PANEL_H_TOT;
516
517 /* set framebuffer width and display width */
518
519 reg = info->fix.line_length;
520 reg |= ((var->xres * var->bits_per_pixel)/8) << 16;
521
522 writel(reg, fbi->regs + (par->head == HEAD_CRT ?
523 SM501_DC_CRT_FB_OFFSET : SM501_DC_PANEL_FB_OFFSET));
524
525 /* program horizontal total */
526
527 reg = (h_total(var) - 1) << 16;
528 reg |= (var->xres - 1);
529
530 writel(reg, base + SM501_OFF_DC_H_TOT);
531
532 /* program horizontal sync */
533
534 reg = var->hsync_len << 16;
535 reg |= var->xres + var->right_margin - 1;
536
537 writel(reg, base + SM501_OFF_DC_H_SYNC);
538
539 /* program vertical total */
540
541 reg = (v_total(var) - 1) << 16;
542 reg |= (var->yres - 1);
543
544 writel(reg, base + SM501_OFF_DC_V_TOT);
545
546 /* program vertical sync */
547 reg = var->vsync_len << 16;
548 reg |= var->yres + var->lower_margin - 1;
549
550 writel(reg, base + SM501_OFF_DC_V_SYNC);
551 }
552
553 /* sm501fb_pan_crt
554 *
555 * pan the CRT display output within an virtual framebuffer
556 */
557
558 static int sm501fb_pan_crt(struct fb_var_screeninfo *var,
559 struct fb_info *info)
560 {
561 struct sm501fb_par *par = info->par;
562 struct sm501fb_info *fbi = par->info;
563 unsigned int bytes_pixel = var->bits_per_pixel / 8;
564 unsigned long reg;
565 unsigned long xoffs;
566
567 xoffs = var->xoffset * bytes_pixel;
568
569 reg = readl(fbi->regs + SM501_DC_CRT_CONTROL);
570
571 reg &= ~SM501_DC_CRT_CONTROL_PIXEL_MASK;
572 reg |= ((xoffs & 15) / bytes_pixel) << 4;
573 writel(reg, fbi->regs + SM501_DC_CRT_CONTROL);
574
575 reg = (par->screen.sm_addr + xoffs +
576 var->yoffset * info->fix.line_length);
577 writel(reg | SM501_ADDR_FLIP, fbi->regs + SM501_DC_CRT_FB_ADDR);
578
579 sm501fb_sync_regs(fbi);
580 return 0;
581 }
582
583 /* sm501fb_pan_pnl
584 *
585 * pan the panel display output within an virtual framebuffer
586 */
587
588 static int sm501fb_pan_pnl(struct fb_var_screeninfo *var,
589 struct fb_info *info)
590 {
591 struct sm501fb_par *par = info->par;
592 struct sm501fb_info *fbi = par->info;
593 unsigned long reg;
594
595 reg = var->xoffset | (var->xres_virtual << 16);
596 writel(reg, fbi->regs + SM501_DC_PANEL_FB_WIDTH);
597
598 reg = var->yoffset | (var->yres_virtual << 16);
599 writel(reg, fbi->regs + SM501_DC_PANEL_FB_HEIGHT);
600
601 sm501fb_sync_regs(fbi);
602 return 0;
603 }
604
605 /* sm501fb_set_par_crt
606 *
607 * Set the CRT video mode from the fb_info structure
608 */
609
610 static int sm501fb_set_par_crt(struct fb_info *info)
611 {
612 struct sm501fb_par *par = info->par;
613 struct sm501fb_info *fbi = par->info;
614 struct fb_var_screeninfo *var = &info->var;
615 unsigned long control; /* control register */
616 int ret;
617
618 /* activate new configuration */
619
620 dev_dbg(fbi->dev, "%s(%p)\n", __func__, info);
621
622 /* enable CRT DAC - note 0 is on!*/
623 sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER);
624
625 control = readl(fbi->regs + SM501_DC_CRT_CONTROL);
626
627 control &= (SM501_DC_CRT_CONTROL_PIXEL_MASK |
628 SM501_DC_CRT_CONTROL_GAMMA |
629 SM501_DC_CRT_CONTROL_BLANK |
630 SM501_DC_CRT_CONTROL_SEL |
631 SM501_DC_CRT_CONTROL_CP |
632 SM501_DC_CRT_CONTROL_TVP);
633
634 /* set the sync polarities before we check data source */
635
636 if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0)
637 control |= SM501_DC_CRT_CONTROL_HSP;
638
639 if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0)
640 control |= SM501_DC_CRT_CONTROL_VSP;
641
642 if ((control & SM501_DC_CRT_CONTROL_SEL) == 0) {
643 /* the head is displaying panel data... */
644
645 sm501_alloc_mem(fbi, &par->screen, SM501_MEMF_CRT, 0,
646 info->fix.smem_len);
647 goto out_update;
648 }
649
650 ret = sm501fb_set_par_common(info, var);
651 if (ret) {
652 dev_err(fbi->dev, "failed to set common parameters\n");
653 return ret;
654 }
655
656 sm501fb_pan_crt(var, info);
657 sm501fb_set_par_geometry(info, var);
658
659 control |= SM501_FIFO_3; /* fill if >3 free slots */
660
661 switch(var->bits_per_pixel) {
662 case 8:
663 control |= SM501_DC_CRT_CONTROL_8BPP;
664 break;
665
666 case 16:
667 control |= SM501_DC_CRT_CONTROL_16BPP;
668 sm501fb_setup_gamma(fbi, SM501_DC_CRT_PALETTE);
669 break;
670
671 case 32:
672 control |= SM501_DC_CRT_CONTROL_32BPP;
673 sm501fb_setup_gamma(fbi, SM501_DC_CRT_PALETTE);
674 break;
675
676 default:
677 BUG();
678 }
679
680 control |= SM501_DC_CRT_CONTROL_SEL; /* CRT displays CRT data */
681 control |= SM501_DC_CRT_CONTROL_TE; /* enable CRT timing */
682 control |= SM501_DC_CRT_CONTROL_ENABLE; /* enable CRT plane */
683
684 out_update:
685 dev_dbg(fbi->dev, "new control is %08lx\n", control);
686
687 writel(control, fbi->regs + SM501_DC_CRT_CONTROL);
688 sm501fb_sync_regs(fbi);
689
690 return 0;
691 }
692
693 static void sm501fb_panel_power(struct sm501fb_info *fbi, int to)
694 {
695 unsigned long control;
696 void __iomem *ctrl_reg = fbi->regs + SM501_DC_PANEL_CONTROL;
697 struct sm501_platdata_fbsub *pd = fbi->pdata->fb_pnl;
698
699 control = readl(ctrl_reg);
700
701 if (to && (control & SM501_DC_PANEL_CONTROL_VDD) == 0) {
702 /* enable panel power */
703
704 control |= SM501_DC_PANEL_CONTROL_VDD; /* FPVDDEN */
705 writel(control, ctrl_reg);
706 sm501fb_sync_regs(fbi);
707 mdelay(10);
708
709 control |= SM501_DC_PANEL_CONTROL_DATA; /* DATA */
710 writel(control, ctrl_reg);
711 sm501fb_sync_regs(fbi);
712 mdelay(10);
713
714 /* VBIASEN */
715
716 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_VBIASEN)) {
717 if (pd->flags & SM501FB_FLAG_PANEL_INV_VBIASEN)
718 control &= ~SM501_DC_PANEL_CONTROL_BIAS;
719 else
720 control |= SM501_DC_PANEL_CONTROL_BIAS;
721
722 writel(control, ctrl_reg);
723 sm501fb_sync_regs(fbi);
724 mdelay(10);
725 }
726
727 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_FPEN)) {
728 if (pd->flags & SM501FB_FLAG_PANEL_INV_FPEN)
729 control &= ~SM501_DC_PANEL_CONTROL_FPEN;
730 else
731 control |= SM501_DC_PANEL_CONTROL_FPEN;
732
733 writel(control, ctrl_reg);
734 sm501fb_sync_regs(fbi);
735 mdelay(10);
736 }
737 } else if (!to && (control & SM501_DC_PANEL_CONTROL_VDD) != 0) {
738 /* disable panel power */
739 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_FPEN)) {
740 if (pd->flags & SM501FB_FLAG_PANEL_INV_FPEN)
741 control |= SM501_DC_PANEL_CONTROL_FPEN;
742 else
743 control &= ~SM501_DC_PANEL_CONTROL_FPEN;
744
745 writel(control, ctrl_reg);
746 sm501fb_sync_regs(fbi);
747 mdelay(10);
748 }
749
750 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_VBIASEN)) {
751 if (pd->flags & SM501FB_FLAG_PANEL_INV_VBIASEN)
752 control |= SM501_DC_PANEL_CONTROL_BIAS;
753 else
754 control &= ~SM501_DC_PANEL_CONTROL_BIAS;
755
756 writel(control, ctrl_reg);
757 sm501fb_sync_regs(fbi);
758 mdelay(10);
759 }
760
761 control &= ~SM501_DC_PANEL_CONTROL_DATA;
762 writel(control, ctrl_reg);
763 sm501fb_sync_regs(fbi);
764 mdelay(10);
765
766 control &= ~SM501_DC_PANEL_CONTROL_VDD;
767 writel(control, ctrl_reg);
768 sm501fb_sync_regs(fbi);
769 mdelay(10);
770 }
771
772 sm501fb_sync_regs(fbi);
773 }
774
775 /* sm501fb_set_par_pnl
776 *
777 * Set the panel video mode from the fb_info structure
778 */
779
780 static int sm501fb_set_par_pnl(struct fb_info *info)
781 {
782 struct sm501fb_par *par = info->par;
783 struct sm501fb_info *fbi = par->info;
784 struct fb_var_screeninfo *var = &info->var;
785 unsigned long control;
786 unsigned long reg;
787 int ret;
788
789 dev_dbg(fbi->dev, "%s(%p)\n", __func__, info);
790
791 /* activate this new configuration */
792
793 ret = sm501fb_set_par_common(info, var);
794 if (ret)
795 return ret;
796
797 sm501fb_pan_pnl(var, info);
798 sm501fb_set_par_geometry(info, var);
799
800 /* update control register */
801
802 control = readl(fbi->regs + SM501_DC_PANEL_CONTROL);
803 control &= (SM501_DC_PANEL_CONTROL_GAMMA |
804 SM501_DC_PANEL_CONTROL_VDD |
805 SM501_DC_PANEL_CONTROL_DATA |
806 SM501_DC_PANEL_CONTROL_BIAS |
807 SM501_DC_PANEL_CONTROL_FPEN |
808 SM501_DC_PANEL_CONTROL_CP |
809 SM501_DC_PANEL_CONTROL_CK |
810 SM501_DC_PANEL_CONTROL_HP |
811 SM501_DC_PANEL_CONTROL_VP |
812 SM501_DC_PANEL_CONTROL_HPD |
813 SM501_DC_PANEL_CONTROL_VPD);
814
815 control |= SM501_FIFO_3; /* fill if >3 free slots */
816
817 switch(var->bits_per_pixel) {
818 case 8:
819 control |= SM501_DC_PANEL_CONTROL_8BPP;
820 break;
821
822 case 16:
823 control |= SM501_DC_PANEL_CONTROL_16BPP;
824 sm501fb_setup_gamma(fbi, SM501_DC_PANEL_PALETTE);
825 break;
826
827 case 32:
828 control |= SM501_DC_PANEL_CONTROL_32BPP;
829 sm501fb_setup_gamma(fbi, SM501_DC_PANEL_PALETTE);
830 break;
831
832 default:
833 BUG();
834 }
835
836 writel(0x0, fbi->regs + SM501_DC_PANEL_PANNING_CONTROL);
837
838 /* panel plane top left and bottom right location */
839
840 writel(0x00, fbi->regs + SM501_DC_PANEL_TL_LOC);
841
842 reg = var->xres - 1;
843 reg |= (var->yres - 1) << 16;
844
845 writel(reg, fbi->regs + SM501_DC_PANEL_BR_LOC);
846
847 /* program panel control register */
848
849 control |= SM501_DC_PANEL_CONTROL_TE; /* enable PANEL timing */
850 control |= SM501_DC_PANEL_CONTROL_EN; /* enable PANEL gfx plane */
851
852 if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0)
853 control |= SM501_DC_PANEL_CONTROL_HSP;
854
855 if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0)
856 control |= SM501_DC_PANEL_CONTROL_VSP;
857
858 writel(control, fbi->regs + SM501_DC_PANEL_CONTROL);
859 sm501fb_sync_regs(fbi);
860
861 /* ensure the panel interface is not tristated at this point */
862
863 sm501_modify_reg(fbi->dev->parent, SM501_SYSTEM_CONTROL,
864 0, SM501_SYSCTRL_PANEL_TRISTATE);
865
866 /* power the panel up */
867 sm501fb_panel_power(fbi, 1);
868 return 0;
869 }
870
871
872 /* chan_to_field
873 *
874 * convert a colour value into a field position
875 *
876 * from pxafb.c
877 */
878
879 static inline unsigned int chan_to_field(unsigned int chan,
880 struct fb_bitfield *bf)
881 {
882 chan &= 0xffff;
883 chan >>= 16 - bf->length;
884 return chan << bf->offset;
885 }
886
887 /* sm501fb_setcolreg
888 *
889 * set the colour mapping for modes that support palettised data
890 */
891
892 static int sm501fb_setcolreg(unsigned regno,
893 unsigned red, unsigned green, unsigned blue,
894 unsigned transp, struct fb_info *info)
895 {
896 struct sm501fb_par *par = info->par;
897 struct sm501fb_info *fbi = par->info;
898 void __iomem *base = fbi->regs;
899 unsigned int val;
900
901 if (par->head == HEAD_CRT)
902 base += SM501_DC_CRT_PALETTE;
903 else
904 base += SM501_DC_PANEL_PALETTE;
905
906 switch (info->fix.visual) {
907 case FB_VISUAL_TRUECOLOR:
908 /* true-colour, use pseuo-palette */
909
910 if (regno < 16) {
911 u32 *pal = par->pseudo_palette;
912
913 val = chan_to_field(red, &info->var.red);
914 val |= chan_to_field(green, &info->var.green);
915 val |= chan_to_field(blue, &info->var.blue);
916
917 pal[regno] = val;
918 }
919 break;
920
921 case FB_VISUAL_PSEUDOCOLOR:
922 if (regno < 256) {
923 val = (red >> 8) << 16;
924 val |= (green >> 8) << 8;
925 val |= blue >> 8;
926
927 writel(val, base + (regno * 4));
928 }
929
930 break;
931
932 default:
933 return 1; /* unknown type */
934 }
935
936 return 0;
937 }
938
939 /* sm501fb_blank_pnl
940 *
941 * Blank or un-blank the panel interface
942 */
943
944 static int sm501fb_blank_pnl(int blank_mode, struct fb_info *info)
945 {
946 struct sm501fb_par *par = info->par;
947 struct sm501fb_info *fbi = par->info;
948
949 dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info);
950
951 switch (blank_mode) {
952 case FB_BLANK_POWERDOWN:
953 sm501fb_panel_power(fbi, 0);
954 break;
955
956 case FB_BLANK_UNBLANK:
957 sm501fb_panel_power(fbi, 1);
958 break;
959
960 case FB_BLANK_NORMAL:
961 case FB_BLANK_VSYNC_SUSPEND:
962 case FB_BLANK_HSYNC_SUSPEND:
963 default:
964 return 1;
965 }
966
967 return 0;
968 }
969
970 /* sm501fb_blank_crt
971 *
972 * Blank or un-blank the crt interface
973 */
974
975 static int sm501fb_blank_crt(int blank_mode, struct fb_info *info)
976 {
977 struct sm501fb_par *par = info->par;
978 struct sm501fb_info *fbi = par->info;
979 unsigned long ctrl;
980
981 dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info);
982
983 ctrl = readl(fbi->regs + SM501_DC_CRT_CONTROL);
984
985 switch (blank_mode) {
986 case FB_BLANK_POWERDOWN:
987 ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE;
988 sm501_misc_control(fbi->dev->parent, SM501_MISC_DAC_POWER, 0);
989
990 case FB_BLANK_NORMAL:
991 ctrl |= SM501_DC_CRT_CONTROL_BLANK;
992 break;
993
994 case FB_BLANK_UNBLANK:
995 ctrl &= ~SM501_DC_CRT_CONTROL_BLANK;
996 ctrl |= SM501_DC_CRT_CONTROL_ENABLE;
997 sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER);
998 break;
999
1000 case FB_BLANK_VSYNC_SUSPEND:
1001 case FB_BLANK_HSYNC_SUSPEND:
1002 default:
1003 return 1;
1004
1005 }
1006
1007 writel(ctrl, fbi->regs + SM501_DC_CRT_CONTROL);
1008 sm501fb_sync_regs(fbi);
1009
1010 return 0;
1011 }
1012
1013 /* sm501fb_cursor
1014 *
1015 * set or change the hardware cursor parameters
1016 */
1017
1018 static int sm501fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
1019 {
1020 struct sm501fb_par *par = info->par;
1021 struct sm501fb_info *fbi = par->info;
1022 void __iomem *base = fbi->regs;
1023 unsigned long hwc_addr;
1024 unsigned long fg, bg;
1025
1026 dev_dbg(fbi->dev, "%s(%p,%p)\n", __func__, info, cursor);
1027
1028 if (par->head == HEAD_CRT)
1029 base += SM501_DC_CRT_HWC_BASE;
1030 else
1031 base += SM501_DC_PANEL_HWC_BASE;
1032
1033 /* check not being asked to exceed capabilities */
1034
1035 if (cursor->image.width > 64)
1036 return -EINVAL;
1037
1038 if (cursor->image.height > 64)
1039 return -EINVAL;
1040
1041 if (cursor->image.depth > 1)
1042 return -EINVAL;
1043
1044 hwc_addr = readl(base + SM501_OFF_HWC_ADDR);
1045
1046 if (cursor->enable)
1047 writel(hwc_addr | SM501_HWC_EN, base + SM501_OFF_HWC_ADDR);
1048 else
1049 writel(hwc_addr & ~SM501_HWC_EN, base + SM501_OFF_HWC_ADDR);
1050
1051 /* set data */
1052 if (cursor->set & FB_CUR_SETPOS) {
1053 unsigned int x = cursor->image.dx;
1054 unsigned int y = cursor->image.dy;
1055
1056 if (x >= 2048 || y >= 2048 )
1057 return -EINVAL;
1058
1059 dev_dbg(fbi->dev, "set position %d,%d\n", x, y);
1060
1061 //y += cursor->image.height;
1062
1063 writel(x | (y << 16), base + SM501_OFF_HWC_LOC);
1064 }
1065
1066 if (cursor->set & FB_CUR_SETCMAP) {
1067 unsigned int bg_col = cursor->image.bg_color;
1068 unsigned int fg_col = cursor->image.fg_color;
1069
1070 dev_dbg(fbi->dev, "%s: update cmap (%08x,%08x)\n",
1071 __func__, bg_col, fg_col);
1072
1073 bg = ((info->cmap.red[bg_col] & 0xF8) << 8) |
1074 ((info->cmap.green[bg_col] & 0xFC) << 3) |
1075 ((info->cmap.blue[bg_col] & 0xF8) >> 3);
1076
1077 fg = ((info->cmap.red[fg_col] & 0xF8) << 8) |
1078 ((info->cmap.green[fg_col] & 0xFC) << 3) |
1079 ((info->cmap.blue[fg_col] & 0xF8) >> 3);
1080
1081 dev_dbg(fbi->dev, "fgcol %08lx, bgcol %08lx\n", fg, bg);
1082
1083 writel(bg, base + SM501_OFF_HWC_COLOR_1_2);
1084 writel(fg, base + SM501_OFF_HWC_COLOR_3);
1085 }
1086
1087 if (cursor->set & FB_CUR_SETSIZE ||
1088 cursor->set & (FB_CUR_SETIMAGE | FB_CUR_SETSHAPE)) {
1089 /* SM501 cursor is a two bpp 64x64 bitmap this routine
1090 * clears it to transparent then combines the cursor
1091 * shape plane with the colour plane to set the
1092 * cursor */
1093 int x, y;
1094 const unsigned char *pcol = cursor->image.data;
1095 const unsigned char *pmsk = cursor->mask;
1096 void __iomem *dst = par->cursor.k_addr;
1097 unsigned char dcol = 0;
1098 unsigned char dmsk = 0;
1099 unsigned int op;
1100
1101 dev_dbg(fbi->dev, "%s: setting shape (%d,%d)\n",
1102 __func__, cursor->image.width, cursor->image.height);
1103
1104 for (op = 0; op < (64*64*2)/8; op+=4)
1105 writel(0x0, dst + op);
1106
1107 for (y = 0; y < cursor->image.height; y++) {
1108 for (x = 0; x < cursor->image.width; x++) {
1109 if ((x % 8) == 0) {
1110 dcol = *pcol++;
1111 dmsk = *pmsk++;
1112 } else {
1113 dcol >>= 1;
1114 dmsk >>= 1;
1115 }
1116
1117 if (dmsk & 1) {
1118 op = (dcol & 1) ? 1 : 3;
1119 op <<= ((x % 4) * 2);
1120
1121 op |= readb(dst + (x / 4));
1122 writeb(op, dst + (x / 4));
1123 }
1124 }
1125 dst += (64*2)/8;
1126 }
1127 }
1128
1129 sm501fb_sync_regs(fbi); /* ensure cursor data flushed */
1130 return 0;
1131 }
1132
1133 /* sm501fb_crtsrc_show
1134 *
1135 * device attribute code to show where the crt output is sourced from
1136 */
1137
1138 static ssize_t sm501fb_crtsrc_show(struct device *dev,
1139 struct device_attribute *attr, char *buf)
1140 {
1141 struct sm501fb_info *info = dev_get_drvdata(dev);
1142 unsigned long ctrl;
1143
1144 ctrl = readl(info->regs + SM501_DC_CRT_CONTROL);
1145 ctrl &= SM501_DC_CRT_CONTROL_SEL;
1146
1147 return snprintf(buf, PAGE_SIZE, "%s\n", ctrl ? "crt" : "panel");
1148 }
1149
1150 /* sm501fb_crtsrc_show
1151 *
1152 * device attribute code to set where the crt output is sourced from
1153 */
1154
1155 static ssize_t sm501fb_crtsrc_store(struct device *dev,
1156 struct device_attribute *attr,
1157 const char *buf, size_t len)
1158 {
1159 struct sm501fb_info *info = dev_get_drvdata(dev);
1160 enum sm501_controller head;
1161 unsigned long ctrl;
1162
1163 if (len < 1)
1164 return -EINVAL;
1165
1166 if (strnicmp(buf, "crt", 3) == 0)
1167 head = HEAD_CRT;
1168 else if (strnicmp(buf, "panel", 5) == 0)
1169 head = HEAD_PANEL;
1170 else
1171 return -EINVAL;
1172
1173 dev_info(dev, "setting crt source to head %d\n", head);
1174
1175 ctrl = readl(info->regs + SM501_DC_CRT_CONTROL);
1176
1177 if (head == HEAD_CRT) {
1178 ctrl |= SM501_DC_CRT_CONTROL_SEL;
1179 ctrl |= SM501_DC_CRT_CONTROL_ENABLE;
1180 ctrl |= SM501_DC_CRT_CONTROL_TE;
1181 } else {
1182 ctrl &= ~SM501_DC_CRT_CONTROL_SEL;
1183 ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE;
1184 ctrl &= ~SM501_DC_CRT_CONTROL_TE;
1185 }
1186
1187 writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1188 sm501fb_sync_regs(info);
1189
1190 return len;
1191 }
1192
1193 /* Prepare the device_attr for registration with sysfs later */
1194 static DEVICE_ATTR(crt_src, 0666, sm501fb_crtsrc_show, sm501fb_crtsrc_store);
1195
1196 /* sm501fb_show_regs
1197 *
1198 * show the primary sm501 registers
1199 */
1200 static int sm501fb_show_regs(struct sm501fb_info *info, char *ptr,
1201 unsigned int start, unsigned int len)
1202 {
1203 void __iomem *mem = info->regs;
1204 char *buf = ptr;
1205 unsigned int reg;
1206
1207 for (reg = start; reg < (len + start); reg += 4)
1208 ptr += sprintf(ptr, "%08x = %08x\n", reg, readl(mem + reg));
1209
1210 return ptr - buf;
1211 }
1212
1213 /* sm501fb_debug_show_crt
1214 *
1215 * show the crt control and cursor registers
1216 */
1217
1218 static ssize_t sm501fb_debug_show_crt(struct device *dev,
1219 struct device_attribute *attr, char *buf)
1220 {
1221 struct sm501fb_info *info = dev_get_drvdata(dev);
1222 char *ptr = buf;
1223
1224 ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_CONTROL, 0x40);
1225 ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_HWC_BASE, 0x10);
1226
1227 return ptr - buf;
1228 }
1229
1230 static DEVICE_ATTR(fbregs_crt, 0444, sm501fb_debug_show_crt, NULL);
1231
1232 /* sm501fb_debug_show_pnl
1233 *
1234 * show the panel control and cursor registers
1235 */
1236
1237 static ssize_t sm501fb_debug_show_pnl(struct device *dev,
1238 struct device_attribute *attr, char *buf)
1239 {
1240 struct sm501fb_info *info = dev_get_drvdata(dev);
1241 char *ptr = buf;
1242
1243 ptr += sm501fb_show_regs(info, ptr, 0x0, 0x40);
1244 ptr += sm501fb_show_regs(info, ptr, SM501_DC_PANEL_HWC_BASE, 0x10);
1245
1246 return ptr - buf;
1247 }
1248
1249 static DEVICE_ATTR(fbregs_pnl, 0444, sm501fb_debug_show_pnl, NULL);
1250
1251 /* acceleration operations */
1252 static int sm501fb_sync(struct fb_info *info)
1253 {
1254 int count = 1000000;
1255 struct sm501fb_par *par = info->par;
1256 struct sm501fb_info *fbi = par->info;
1257
1258 /* wait for the 2d engine to be ready */
1259 while ((count > 0) &&
1260 (readl(fbi->regs + SM501_SYSTEM_CONTROL) &
1261 SM501_SYSCTRL_2D_ENGINE_STATUS) != 0)
1262 count--;
1263
1264 if (count <= 0) {
1265 dev_err(info->dev, "Timeout waiting for 2d engine sync\n");
1266 return 1;
1267 }
1268 return 0;
1269 }
1270
1271 static void sm501fb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
1272 {
1273 struct sm501fb_par *par = info->par;
1274 struct sm501fb_info *fbi = par->info;
1275 int width = area->width;
1276 int height = area->height;
1277 int sx = area->sx;
1278 int sy = area->sy;
1279 int dx = area->dx;
1280 int dy = area->dy;
1281 unsigned long rtl = 0;
1282
1283 /* source clip */
1284 if ((sx >= info->var.xres_virtual) ||
1285 (sy >= info->var.yres_virtual))
1286 /* source Area not within virtual screen, skipping */
1287 return;
1288 if ((sx + width) >= info->var.xres_virtual)
1289 width = info->var.xres_virtual - sx - 1;
1290 if ((sy + height) >= info->var.yres_virtual)
1291 height = info->var.yres_virtual - sy - 1;
1292
1293 /* dest clip */
1294 if ((dx >= info->var.xres_virtual) ||
1295 (dy >= info->var.yres_virtual))
1296 /* Destination Area not within virtual screen, skipping */
1297 return;
1298 if ((dx + width) >= info->var.xres_virtual)
1299 width = info->var.xres_virtual - dx - 1;
1300 if ((dy + height) >= info->var.yres_virtual)
1301 height = info->var.yres_virtual - dy - 1;
1302
1303 if ((sx < dx) || (sy < dy)) {
1304 rtl = 1 << 27;
1305 sx += width - 1;
1306 dx += width - 1;
1307 sy += height - 1;
1308 dy += height - 1;
1309 }
1310
1311 if (sm501fb_sync(info))
1312 return;
1313
1314 /* set the base addresses */
1315 writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE);
1316 writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_DESTINATION_BASE);
1317
1318 /* set the window width */
1319 writel((info->var.xres << 16) | info->var.xres,
1320 fbi->regs2d + SM501_2D_WINDOW_WIDTH);
1321
1322 /* set window stride */
1323 writel((info->var.xres_virtual << 16) | info->var.xres_virtual,
1324 fbi->regs2d + SM501_2D_PITCH);
1325
1326 /* set data format */
1327 switch (info->var.bits_per_pixel) {
1328 case 8:
1329 writel(0, fbi->regs2d + SM501_2D_STRETCH);
1330 break;
1331 case 16:
1332 writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH);
1333 break;
1334 case 32:
1335 writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH);
1336 break;
1337 }
1338
1339 /* 2d compare mask */
1340 writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK);
1341
1342 /* 2d mask */
1343 writel(0xffffffff, fbi->regs2d + SM501_2D_MASK);
1344
1345 /* source and destination x y */
1346 writel((sx << 16) | sy, fbi->regs2d + SM501_2D_SOURCE);
1347 writel((dx << 16) | dy, fbi->regs2d + SM501_2D_DESTINATION);
1348
1349 /* w/h */
1350 writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION);
1351
1352 /* do area move */
1353 writel(0x800000cc | rtl, fbi->regs2d + SM501_2D_CONTROL);
1354 }
1355
1356 static void sm501fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
1357 {
1358 struct sm501fb_par *par = info->par;
1359 struct sm501fb_info *fbi = par->info;
1360 int width = rect->width, height = rect->height;
1361
1362 if ((rect->dx >= info->var.xres_virtual) ||
1363 (rect->dy >= info->var.yres_virtual))
1364 /* Rectangle not within virtual screen, skipping */
1365 return;
1366 if ((rect->dx + width) >= info->var.xres_virtual)
1367 width = info->var.xres_virtual - rect->dx - 1;
1368 if ((rect->dy + height) >= info->var.yres_virtual)
1369 height = info->var.yres_virtual - rect->dy - 1;
1370
1371 if (sm501fb_sync(info))
1372 return;
1373
1374 /* set the base addresses */
1375 writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE);
1376 writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_DESTINATION_BASE);
1377
1378 /* set the window width */
1379 writel((info->var.xres << 16) | info->var.xres,
1380 fbi->regs2d + SM501_2D_WINDOW_WIDTH);
1381
1382 /* set window stride */
1383 writel((info->var.xres_virtual << 16) | info->var.xres_virtual,
1384 fbi->regs2d + SM501_2D_PITCH);
1385
1386 /* set data format */
1387 switch (info->var.bits_per_pixel) {
1388 case 8:
1389 writel(0, fbi->regs2d + SM501_2D_STRETCH);
1390 break;
1391 case 16:
1392 writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH);
1393 break;
1394 case 32:
1395 writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH);
1396 break;
1397 }
1398
1399 /* 2d compare mask */
1400 writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK);
1401
1402 /* 2d mask */
1403 writel(0xffffffff, fbi->regs2d + SM501_2D_MASK);
1404
1405 /* colour */
1406 writel(rect->color, fbi->regs2d + SM501_2D_FOREGROUND);
1407
1408 /* x y */
1409 writel((rect->dx << 16) | rect->dy, fbi->regs2d + SM501_2D_DESTINATION);
1410
1411 /* w/h */
1412 writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION);
1413
1414 /* do rectangle fill */
1415 writel(0x800100cc, fbi->regs2d + SM501_2D_CONTROL);
1416 }
1417
1418
1419 static struct fb_ops sm501fb_ops_crt = {
1420 .owner = THIS_MODULE,
1421 .fb_check_var = sm501fb_check_var_crt,
1422 .fb_set_par = sm501fb_set_par_crt,
1423 .fb_blank = sm501fb_blank_crt,
1424 .fb_setcolreg = sm501fb_setcolreg,
1425 .fb_pan_display = sm501fb_pan_crt,
1426 .fb_cursor = sm501fb_cursor,
1427 .fb_fillrect = sm501fb_fillrect,
1428 .fb_copyarea = sm501fb_copyarea,
1429 .fb_imageblit = cfb_imageblit,
1430 .fb_sync = sm501fb_sync,
1431 };
1432
1433 static struct fb_ops sm501fb_ops_pnl = {
1434 .owner = THIS_MODULE,
1435 .fb_check_var = sm501fb_check_var_pnl,
1436 .fb_set_par = sm501fb_set_par_pnl,
1437 .fb_pan_display = sm501fb_pan_pnl,
1438 .fb_blank = sm501fb_blank_pnl,
1439 .fb_setcolreg = sm501fb_setcolreg,
1440 .fb_cursor = sm501fb_cursor,
1441 .fb_fillrect = sm501fb_fillrect,
1442 .fb_copyarea = sm501fb_copyarea,
1443 .fb_imageblit = cfb_imageblit,
1444 .fb_sync = sm501fb_sync,
1445 };
1446
1447 /* sm501_init_cursor
1448 *
1449 * initialise hw cursor parameters
1450 */
1451
1452 static int sm501_init_cursor(struct fb_info *fbi, unsigned int reg_base)
1453 {
1454 struct sm501fb_par *par;
1455 struct sm501fb_info *info;
1456 int ret;
1457
1458 if (fbi == NULL)
1459 return 0;
1460
1461 par = fbi->par;
1462 info = par->info;
1463
1464 par->cursor_regs = info->regs + reg_base;
1465
1466 ret = sm501_alloc_mem(info, &par->cursor, SM501_MEMF_CURSOR, 1024,
1467 fbi->fix.smem_len);
1468 if (ret < 0)
1469 return ret;
1470
1471 /* initialise the colour registers */
1472
1473 writel(par->cursor.sm_addr, par->cursor_regs + SM501_OFF_HWC_ADDR);
1474
1475 writel(0x00, par->cursor_regs + SM501_OFF_HWC_LOC);
1476 writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_1_2);
1477 writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_3);
1478 sm501fb_sync_regs(info);
1479
1480 return 0;
1481 }
1482
1483 /* sm501fb_info_start
1484 *
1485 * fills the par structure claiming resources and remapping etc.
1486 */
1487
1488 static int sm501fb_start(struct sm501fb_info *info,
1489 struct platform_device *pdev)
1490 {
1491 struct resource *res;
1492 struct device *dev = &pdev->dev;
1493 int k;
1494 int ret;
1495
1496 info->irq = ret = platform_get_irq(pdev, 0);
1497 if (ret < 0) {
1498 /* we currently do not use the IRQ */
1499 dev_warn(dev, "no irq for device\n");
1500 }
1501
1502 /* allocate, reserve and remap resources for display
1503 * controller registers */
1504 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1505 if (res == NULL) {
1506 dev_err(dev, "no resource definition for registers\n");
1507 ret = -ENOENT;
1508 goto err_release;
1509 }
1510
1511 info->regs_res = request_mem_region(res->start,
1512 resource_size(res),
1513 pdev->name);
1514
1515 if (info->regs_res == NULL) {
1516 dev_err(dev, "cannot claim registers\n");
1517 ret = -ENXIO;
1518 goto err_release;
1519 }
1520
1521 info->regs = ioremap(res->start, resource_size(res));
1522 if (info->regs == NULL) {
1523 dev_err(dev, "cannot remap registers\n");
1524 ret = -ENXIO;
1525 goto err_regs_res;
1526 }
1527
1528 /* allocate, reserve and remap resources for 2d
1529 * controller registers */
1530 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1531 if (res == NULL) {
1532 dev_err(dev, "no resource definition for 2d registers\n");
1533 ret = -ENOENT;
1534 goto err_regs_map;
1535 }
1536
1537 info->regs2d_res = request_mem_region(res->start,
1538 resource_size(res),
1539 pdev->name);
1540
1541 if (info->regs2d_res == NULL) {
1542 dev_err(dev, "cannot claim registers\n");
1543 ret = -ENXIO;
1544 goto err_regs_map;
1545 }
1546
1547 info->regs2d = ioremap(res->start, resource_size(res));
1548 if (info->regs2d == NULL) {
1549 dev_err(dev, "cannot remap registers\n");
1550 ret = -ENXIO;
1551 goto err_regs2d_res;
1552 }
1553
1554 /* allocate, reserve resources for framebuffer */
1555 res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
1556 if (res == NULL) {
1557 dev_err(dev, "no memory resource defined\n");
1558 ret = -ENXIO;
1559 goto err_regs2d_map;
1560 }
1561
1562 info->fbmem_res = request_mem_region(res->start,
1563 resource_size(res),
1564 pdev->name);
1565 if (info->fbmem_res == NULL) {
1566 dev_err(dev, "cannot claim framebuffer\n");
1567 ret = -ENXIO;
1568 goto err_regs2d_map;
1569 }
1570
1571 info->fbmem = ioremap(res->start, resource_size(res));
1572 if (info->fbmem == NULL) {
1573 dev_err(dev, "cannot remap framebuffer\n");
1574 goto err_mem_res;
1575 }
1576
1577 info->fbmem_len = resource_size(res);
1578
1579 /* clear framebuffer memory - avoids garbage data on unused fb */
1580 memset(info->fbmem, 0, info->fbmem_len);
1581
1582 /* clear palette ram - undefined at power on */
1583 for (k = 0; k < (256 * 3); k++)
1584 writel(0, info->regs + SM501_DC_PANEL_PALETTE + (k * 4));
1585
1586 /* enable display controller */
1587 sm501_unit_power(dev->parent, SM501_GATE_DISPLAY, 1);
1588
1589 /* enable 2d controller */
1590 sm501_unit_power(dev->parent, SM501_GATE_2D_ENGINE, 1);
1591
1592 /* setup cursors */
1593 sm501_init_cursor(info->fb[HEAD_CRT], SM501_DC_CRT_HWC_ADDR);
1594 sm501_init_cursor(info->fb[HEAD_PANEL], SM501_DC_PANEL_HWC_ADDR);
1595
1596 return 0; /* everything is setup */
1597
1598 err_mem_res:
1599 release_resource(info->fbmem_res);
1600 kfree(info->fbmem_res);
1601
1602 err_regs2d_map:
1603 iounmap(info->regs2d);
1604
1605 err_regs2d_res:
1606 release_resource(info->regs2d_res);
1607 kfree(info->regs2d_res);
1608
1609 err_regs_map:
1610 iounmap(info->regs);
1611
1612 err_regs_res:
1613 release_resource(info->regs_res);
1614 kfree(info->regs_res);
1615
1616 err_release:
1617 return ret;
1618 }
1619
1620 static void sm501fb_stop(struct sm501fb_info *info)
1621 {
1622 /* disable display controller */
1623 sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0);
1624
1625 iounmap(info->fbmem);
1626 release_resource(info->fbmem_res);
1627 kfree(info->fbmem_res);
1628
1629 iounmap(info->regs2d);
1630 release_resource(info->regs2d_res);
1631 kfree(info->regs2d_res);
1632
1633 iounmap(info->regs);
1634 release_resource(info->regs_res);
1635 kfree(info->regs_res);
1636 }
1637
1638 static int sm501fb_init_fb(struct fb_info *fb,
1639 enum sm501_controller head,
1640 const char *fbname)
1641 {
1642 struct sm501_platdata_fbsub *pd;
1643 struct sm501fb_par *par = fb->par;
1644 struct sm501fb_info *info = par->info;
1645 unsigned long ctrl;
1646 unsigned int enable;
1647 int ret;
1648
1649 switch (head) {
1650 case HEAD_CRT:
1651 pd = info->pdata->fb_crt;
1652 ctrl = readl(info->regs + SM501_DC_CRT_CONTROL);
1653 enable = (ctrl & SM501_DC_CRT_CONTROL_ENABLE) ? 1 : 0;
1654
1655 /* ensure we set the correct source register */
1656 if (info->pdata->fb_route != SM501_FB_CRT_PANEL) {
1657 ctrl |= SM501_DC_CRT_CONTROL_SEL;
1658 writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1659 }
1660
1661 break;
1662
1663 case HEAD_PANEL:
1664 pd = info->pdata->fb_pnl;
1665 ctrl = readl(info->regs + SM501_DC_PANEL_CONTROL);
1666 enable = (ctrl & SM501_DC_PANEL_CONTROL_EN) ? 1 : 0;
1667 break;
1668
1669 default:
1670 pd = NULL; /* stop compiler warnings */
1671 ctrl = 0;
1672 enable = 0;
1673 BUG();
1674 }
1675
1676 dev_info(info->dev, "fb %s %sabled at start\n",
1677 fbname, enable ? "en" : "dis");
1678
1679 /* check to see if our routing allows this */
1680
1681 if (head == HEAD_CRT && info->pdata->fb_route == SM501_FB_CRT_PANEL) {
1682 ctrl &= ~SM501_DC_CRT_CONTROL_SEL;
1683 writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1684 enable = 0;
1685 }
1686
1687 strlcpy(fb->fix.id, fbname, sizeof(fb->fix.id));
1688
1689 memcpy(&par->ops,
1690 (head == HEAD_CRT) ? &sm501fb_ops_crt : &sm501fb_ops_pnl,
1691 sizeof(struct fb_ops));
1692
1693 /* update ops dependant on what we've been passed */
1694
1695 if ((pd->flags & SM501FB_FLAG_USE_HWCURSOR) == 0)
1696 par->ops.fb_cursor = NULL;
1697
1698 fb->fbops = &par->ops;
1699 fb->flags = FBINFO_FLAG_DEFAULT | FBINFO_READS_FAST |
1700 FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
1701 FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN;
1702
1703 /* fixed data */
1704
1705 fb->fix.type = FB_TYPE_PACKED_PIXELS;
1706 fb->fix.type_aux = 0;
1707 fb->fix.xpanstep = 1;
1708 fb->fix.ypanstep = 1;
1709 fb->fix.ywrapstep = 0;
1710 fb->fix.accel = FB_ACCEL_NONE;
1711
1712 /* screenmode */
1713
1714 fb->var.nonstd = 0;
1715 fb->var.activate = FB_ACTIVATE_NOW;
1716 fb->var.accel_flags = 0;
1717 fb->var.vmode = FB_VMODE_NONINTERLACED;
1718 fb->var.bits_per_pixel = 16;
1719
1720 if (enable && (pd->flags & SM501FB_FLAG_USE_INIT_MODE) && 0) {
1721 /* TODO read the mode from the current display */
1722
1723 } else {
1724 if (pd->def_mode) {
1725 dev_info(info->dev, "using supplied mode\n");
1726 fb_videomode_to_var(&fb->var, pd->def_mode);
1727
1728 fb->var.bits_per_pixel = pd->def_bpp ? pd->def_bpp : 8;
1729 fb->var.xres_virtual = fb->var.xres;
1730 fb->var.yres_virtual = fb->var.yres;
1731 } else {
1732 ret = fb_find_mode(&fb->var, fb,
1733 NULL, NULL, 0, NULL, 8);
1734
1735 if (ret == 0 || ret == 4) {
1736 dev_err(info->dev,
1737 "failed to get initial mode\n");
1738 return -EINVAL;
1739 }
1740 }
1741 }
1742
1743 /* initialise and set the palette */
1744 if (fb_alloc_cmap(&fb->cmap, NR_PALETTE, 0)) {
1745 dev_err(info->dev, "failed to allocate cmap memory\n");
1746 return -ENOMEM;
1747 }
1748 fb_set_cmap(&fb->cmap, fb);
1749
1750 ret = (fb->fbops->fb_check_var)(&fb->var, fb);
1751 if (ret)
1752 dev_err(info->dev, "check_var() failed on initial setup?\n");
1753
1754 return 0;
1755 }
1756
1757 /* default platform data if none is supplied (ie, PCI device) */
1758
1759 static struct sm501_platdata_fbsub sm501fb_pdata_crt = {
1760 .flags = (SM501FB_FLAG_USE_INIT_MODE |
1761 SM501FB_FLAG_USE_HWCURSOR |
1762 SM501FB_FLAG_USE_HWACCEL |
1763 SM501FB_FLAG_DISABLE_AT_EXIT),
1764
1765 };
1766
1767 static struct sm501_platdata_fbsub sm501fb_pdata_pnl = {
1768 .flags = (SM501FB_FLAG_USE_INIT_MODE |
1769 SM501FB_FLAG_USE_HWCURSOR |
1770 SM501FB_FLAG_USE_HWACCEL |
1771 SM501FB_FLAG_DISABLE_AT_EXIT),
1772 };
1773
1774 static struct sm501_platdata_fb sm501fb_def_pdata = {
1775 .fb_route = SM501_FB_OWN,
1776 .fb_crt = &sm501fb_pdata_crt,
1777 .fb_pnl = &sm501fb_pdata_pnl,
1778 };
1779
1780 static char driver_name_crt[] = "sm501fb-crt";
1781 static char driver_name_pnl[] = "sm501fb-panel";
1782
1783 static int __devinit sm501fb_probe_one(struct sm501fb_info *info,
1784 enum sm501_controller head)
1785 {
1786 unsigned char *name = (head == HEAD_CRT) ? "crt" : "panel";
1787 struct sm501_platdata_fbsub *pd;
1788 struct sm501fb_par *par;
1789 struct fb_info *fbi;
1790
1791 pd = (head == HEAD_CRT) ? info->pdata->fb_crt : info->pdata->fb_pnl;
1792
1793 /* Do not initialise if we've not been given any platform data */
1794 if (pd == NULL) {
1795 dev_info(info->dev, "no data for fb %s (disabled)\n", name);
1796 return 0;
1797 }
1798
1799 fbi = framebuffer_alloc(sizeof(struct sm501fb_par), info->dev);
1800 if (fbi == NULL) {
1801 dev_err(info->dev, "cannot allocate %s framebuffer\n", name);
1802 return -ENOMEM;
1803 }
1804
1805 par = fbi->par;
1806 par->info = info;
1807 par->head = head;
1808 fbi->pseudo_palette = &par->pseudo_palette;
1809
1810 info->fb[head] = fbi;
1811
1812 return 0;
1813 }
1814
1815 /* Free up anything allocated by sm501fb_init_fb */
1816
1817 static void sm501_free_init_fb(struct sm501fb_info *info,
1818 enum sm501_controller head)
1819 {
1820 struct fb_info *fbi = info->fb[head];
1821
1822 fb_dealloc_cmap(&fbi->cmap);
1823 }
1824
1825 static int __devinit sm501fb_start_one(struct sm501fb_info *info,
1826 enum sm501_controller head,
1827 const char *drvname)
1828 {
1829 struct fb_info *fbi = info->fb[head];
1830 int ret;
1831
1832 if (!fbi)
1833 return 0;
1834
1835 mutex_init(&info->fb[head]->mm_lock);
1836
1837 ret = sm501fb_init_fb(info->fb[head], head, drvname);
1838 if (ret) {
1839 dev_err(info->dev, "cannot initialise fb %s\n", drvname);
1840 return ret;
1841 }
1842
1843 ret = register_framebuffer(info->fb[head]);
1844 if (ret) {
1845 dev_err(info->dev, "failed to register fb %s\n", drvname);
1846 sm501_free_init_fb(info, head);
1847 return ret;
1848 }
1849
1850 dev_info(info->dev, "fb%d: %s frame buffer\n", fbi->node, fbi->fix.id);
1851
1852 return 0;
1853 }
1854
1855 static int __devinit sm501fb_probe(struct platform_device *pdev)
1856 {
1857 struct sm501fb_info *info;
1858 struct device *dev = &pdev->dev;
1859 int ret;
1860
1861 /* allocate our framebuffers */
1862
1863 info = kzalloc(sizeof(struct sm501fb_info), GFP_KERNEL);
1864 if (!info) {
1865 dev_err(dev, "failed to allocate state\n");
1866 return -ENOMEM;
1867 }
1868
1869 info->dev = dev = &pdev->dev;
1870 platform_set_drvdata(pdev, info);
1871
1872 if (dev->parent->platform_data) {
1873 struct sm501_platdata *pd = dev->parent->platform_data;
1874 info->pdata = pd->fb;
1875 }
1876
1877 if (info->pdata == NULL) {
1878 dev_info(dev, "using default configuration data\n");
1879 info->pdata = &sm501fb_def_pdata;
1880 }
1881
1882 /* probe for the presence of each panel */
1883
1884 ret = sm501fb_probe_one(info, HEAD_CRT);
1885 if (ret < 0) {
1886 dev_err(dev, "failed to probe CRT\n");
1887 goto err_alloc;
1888 }
1889
1890 ret = sm501fb_probe_one(info, HEAD_PANEL);
1891 if (ret < 0) {
1892 dev_err(dev, "failed to probe PANEL\n");
1893 goto err_probed_crt;
1894 }
1895
1896 if (info->fb[HEAD_PANEL] == NULL &&
1897 info->fb[HEAD_CRT] == NULL) {
1898 dev_err(dev, "no framebuffers found\n");
1899 goto err_alloc;
1900 }
1901
1902 /* get the resources for both of the framebuffers */
1903
1904 ret = sm501fb_start(info, pdev);
1905 if (ret) {
1906 dev_err(dev, "cannot initialise SM501\n");
1907 goto err_probed_panel;
1908 }
1909
1910 ret = sm501fb_start_one(info, HEAD_CRT, driver_name_crt);
1911 if (ret) {
1912 dev_err(dev, "failed to start CRT\n");
1913 goto err_started;
1914 }
1915
1916 ret = sm501fb_start_one(info, HEAD_PANEL, driver_name_pnl);
1917 if (ret) {
1918 dev_err(dev, "failed to start Panel\n");
1919 goto err_started_crt;
1920 }
1921
1922 /* create device files */
1923
1924 ret = device_create_file(dev, &dev_attr_crt_src);
1925 if (ret)
1926 goto err_started_panel;
1927
1928 ret = device_create_file(dev, &dev_attr_fbregs_pnl);
1929 if (ret)
1930 goto err_attached_crtsrc_file;
1931
1932 ret = device_create_file(dev, &dev_attr_fbregs_crt);
1933 if (ret)
1934 goto err_attached_pnlregs_file;
1935
1936 /* we registered, return ok */
1937 return 0;
1938
1939 err_attached_pnlregs_file:
1940 device_remove_file(dev, &dev_attr_fbregs_pnl);
1941
1942 err_attached_crtsrc_file:
1943 device_remove_file(dev, &dev_attr_crt_src);
1944
1945 err_started_panel:
1946 unregister_framebuffer(info->fb[HEAD_PANEL]);
1947 sm501_free_init_fb(info, HEAD_PANEL);
1948
1949 err_started_crt:
1950 unregister_framebuffer(info->fb[HEAD_CRT]);
1951 sm501_free_init_fb(info, HEAD_CRT);
1952
1953 err_started:
1954 sm501fb_stop(info);
1955
1956 err_probed_panel:
1957 framebuffer_release(info->fb[HEAD_PANEL]);
1958
1959 err_probed_crt:
1960 framebuffer_release(info->fb[HEAD_CRT]);
1961
1962 err_alloc:
1963 kfree(info);
1964
1965 return ret;
1966 }
1967
1968
1969 /*
1970 * Cleanup
1971 */
1972 static int sm501fb_remove(struct platform_device *pdev)
1973 {
1974 struct sm501fb_info *info = platform_get_drvdata(pdev);
1975 struct fb_info *fbinfo_crt = info->fb[0];
1976 struct fb_info *fbinfo_pnl = info->fb[1];
1977
1978 device_remove_file(&pdev->dev, &dev_attr_fbregs_crt);
1979 device_remove_file(&pdev->dev, &dev_attr_fbregs_pnl);
1980 device_remove_file(&pdev->dev, &dev_attr_crt_src);
1981
1982 sm501_free_init_fb(info, HEAD_CRT);
1983 sm501_free_init_fb(info, HEAD_PANEL);
1984
1985 unregister_framebuffer(fbinfo_crt);
1986 unregister_framebuffer(fbinfo_pnl);
1987
1988 sm501fb_stop(info);
1989 kfree(info);
1990
1991 framebuffer_release(fbinfo_pnl);
1992 framebuffer_release(fbinfo_crt);
1993
1994 return 0;
1995 }
1996
1997 #ifdef CONFIG_PM
1998
1999 static int sm501fb_suspend_fb(struct sm501fb_info *info,
2000 enum sm501_controller head)
2001 {
2002 struct fb_info *fbi = info->fb[head];
2003 struct sm501fb_par *par = fbi->par;
2004
2005 if (par->screen.size == 0)
2006 return 0;
2007
2008 /* blank the relevant interface to ensure unit power minimised */
2009 (par->ops.fb_blank)(FB_BLANK_POWERDOWN, fbi);
2010
2011 /* tell console/fb driver we are suspending */
2012
2013 acquire_console_sem();
2014 fb_set_suspend(fbi, 1);
2015 release_console_sem();
2016
2017 /* backup copies in case chip is powered down over suspend */
2018
2019 par->store_fb = vmalloc(par->screen.size);
2020 if (par->store_fb == NULL) {
2021 dev_err(info->dev, "no memory to store screen\n");
2022 return -ENOMEM;
2023 }
2024
2025 par->store_cursor = vmalloc(par->cursor.size);
2026 if (par->store_cursor == NULL) {
2027 dev_err(info->dev, "no memory to store cursor\n");
2028 goto err_nocursor;
2029 }
2030
2031 dev_dbg(info->dev, "suspending screen to %p\n", par->store_fb);
2032 dev_dbg(info->dev, "suspending cursor to %p\n", par->store_cursor);
2033
2034 memcpy_fromio(par->store_fb, par->screen.k_addr, par->screen.size);
2035 memcpy_fromio(par->store_cursor, par->cursor.k_addr, par->cursor.size);
2036
2037 return 0;
2038
2039 err_nocursor:
2040 vfree(par->store_fb);
2041 par->store_fb = NULL;
2042
2043 return -ENOMEM;
2044 }
2045
2046 static void sm501fb_resume_fb(struct sm501fb_info *info,
2047 enum sm501_controller head)
2048 {
2049 struct fb_info *fbi = info->fb[head];
2050 struct sm501fb_par *par = fbi->par;
2051
2052 if (par->screen.size == 0)
2053 return;
2054
2055 /* re-activate the configuration */
2056
2057 (par->ops.fb_set_par)(fbi);
2058
2059 /* restore the data */
2060
2061 dev_dbg(info->dev, "restoring screen from %p\n", par->store_fb);
2062 dev_dbg(info->dev, "restoring cursor from %p\n", par->store_cursor);
2063
2064 if (par->store_fb)
2065 memcpy_toio(par->screen.k_addr, par->store_fb,
2066 par->screen.size);
2067
2068 if (par->store_cursor)
2069 memcpy_toio(par->cursor.k_addr, par->store_cursor,
2070 par->cursor.size);
2071
2072 acquire_console_sem();
2073 fb_set_suspend(fbi, 0);
2074 release_console_sem();
2075
2076 vfree(par->store_fb);
2077 vfree(par->store_cursor);
2078 }
2079
2080
2081 /* suspend and resume support */
2082
2083 static int sm501fb_suspend(struct platform_device *pdev, pm_message_t state)
2084 {
2085 struct sm501fb_info *info = platform_get_drvdata(pdev);
2086
2087 /* store crt control to resume with */
2088 info->pm_crt_ctrl = readl(info->regs + SM501_DC_CRT_CONTROL);
2089
2090 sm501fb_suspend_fb(info, HEAD_CRT);
2091 sm501fb_suspend_fb(info, HEAD_PANEL);
2092
2093 /* turn off the clocks, in case the device is not powered down */
2094 sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0);
2095
2096 return 0;
2097 }
2098
2099 #define SM501_CRT_CTRL_SAVE (SM501_DC_CRT_CONTROL_TVP | \
2100 SM501_DC_CRT_CONTROL_SEL)
2101
2102
2103 static int sm501fb_resume(struct platform_device *pdev)
2104 {
2105 struct sm501fb_info *info = platform_get_drvdata(pdev);
2106 unsigned long crt_ctrl;
2107
2108 sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 1);
2109
2110 /* restore the items we want to be saved for crt control */
2111
2112 crt_ctrl = readl(info->regs + SM501_DC_CRT_CONTROL);
2113 crt_ctrl &= ~SM501_CRT_CTRL_SAVE;
2114 crt_ctrl |= info->pm_crt_ctrl & SM501_CRT_CTRL_SAVE;
2115 writel(crt_ctrl, info->regs + SM501_DC_CRT_CONTROL);
2116
2117 sm501fb_resume_fb(info, HEAD_CRT);
2118 sm501fb_resume_fb(info, HEAD_PANEL);
2119
2120 return 0;
2121 }
2122
2123 #else
2124 #define sm501fb_suspend NULL
2125 #define sm501fb_resume NULL
2126 #endif
2127
2128 static struct platform_driver sm501fb_driver = {
2129 .probe = sm501fb_probe,
2130 .remove = sm501fb_remove,
2131 .suspend = sm501fb_suspend,
2132 .resume = sm501fb_resume,
2133 .driver = {
2134 .name = "sm501-fb",
2135 .owner = THIS_MODULE,
2136 },
2137 };
2138
2139 static int __devinit sm501fb_init(void)
2140 {
2141 return platform_driver_register(&sm501fb_driver);
2142 }
2143
2144 static void __exit sm501fb_cleanup(void)
2145 {
2146 platform_driver_unregister(&sm501fb_driver);
2147 }
2148
2149 module_init(sm501fb_init);
2150 module_exit(sm501fb_cleanup);
2151
2152 MODULE_AUTHOR("Ben Dooks, Vincent Sanders");
2153 MODULE_DESCRIPTION("SM501 Framebuffer driver");
2154 MODULE_LICENSE("GPL v2");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree