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 <linux/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 #include "edid.h"
45
46 static char *fb_mode = "640x480-16@60";
47 static unsigned long default_bpp = 16;
48
49 static const struct fb_videomode sm501_default_mode = {
50 .refresh = 60,
51 .xres = 640,
52 .yres = 480,
53 .pixclock = 20833,
54 .left_margin = 142,
55 .right_margin = 13,
56 .upper_margin = 21,
57 .lower_margin = 1,
58 .hsync_len = 69,
59 .vsync_len = 3,
60 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
61 .vmode = FB_VMODE_NONINTERLACED
62 };
63
64 #define NR_PALETTE 256
65
66 enum sm501_controller {
67 HEAD_CRT = 0,
68 HEAD_PANEL = 1,
69 };
70
71 /* SM501 memory address.
72 *
73 * This structure is used to track memory usage within the SM501 framebuffer
74 * allocation. The sm_addr field is stored as an offset as it is often used
75 * against both the physical and mapped addresses.
76 */
77 struct sm501_mem {
78 unsigned long size;
79 unsigned long sm_addr; /* offset from base of sm501 fb. */
80 void __iomem *k_addr;
81 };
82
83 /* private data that is shared between all frambuffers* */
84 struct sm501fb_info {
85 struct device *dev;
86 struct fb_info *fb[2]; /* fb info for both heads */
87 struct resource *fbmem_res; /* framebuffer resource */
88 struct resource *regs_res; /* registers resource */
89 struct resource *regs2d_res; /* 2d registers resource */
90 struct sm501_platdata_fb *pdata; /* our platform data */
91
92 unsigned long pm_crt_ctrl; /* pm: crt ctrl save */
93
94 int irq;
95 int swap_endian; /* set to swap rgb=>bgr */
96 void __iomem *regs; /* remapped registers */
97 void __iomem *regs2d; /* 2d remapped registers */
98 void __iomem *fbmem; /* remapped framebuffer */
99 size_t fbmem_len; /* length of remapped region */
100 u8 *edid_data;
101 };
102
103 /* per-framebuffer private data */
104 struct sm501fb_par {
105 u32 pseudo_palette[16];
106
107 enum sm501_controller head;
108 struct sm501_mem cursor;
109 struct sm501_mem screen;
110 struct fb_ops ops;
111
112 void *store_fb;
113 void *store_cursor;
114 void __iomem *cursor_regs;
115 struct sm501fb_info *info;
116 };
117
118 /* Helper functions */
119
h_total(struct fb_var_screeninfo * var)120 static inline int h_total(struct fb_var_screeninfo *var)
121 {
122 return var->xres + var->left_margin +
123 var->right_margin + var->hsync_len;
124 }
125
v_total(struct fb_var_screeninfo * var)126 static inline int v_total(struct fb_var_screeninfo *var)
127 {
128 return var->yres + var->upper_margin +
129 var->lower_margin + var->vsync_len;
130 }
131
132 /* sm501fb_sync_regs()
133 *
134 * This call is mainly for PCI bus systems where we need to
135 * ensure that any writes to the bus are completed before the
136 * next phase, or after completing a function.
137 */
138
sm501fb_sync_regs(struct sm501fb_info * info)139 static inline void sm501fb_sync_regs(struct sm501fb_info *info)
140 {
141 smc501_readl(info->regs);
142 }
143
144 /* sm501_alloc_mem
145 *
146 * This is an attempt to lay out memory for the two framebuffers and
147 * everything else
148 *
149 * |fbmem_res->start fbmem_res->end|
150 * | |
151 * |fb[0].fix.smem_start | |fb[1].fix.smem_start | 2K |
152 * |-> fb[0].fix.smem_len <-| spare |-> fb[1].fix.smem_len <-|-> cursors <-|
153 *
154 * The "spare" space is for the 2d engine data
155 * the fixed is space for the cursors (2x1Kbyte)
156 *
157 * we need to allocate memory for the 2D acceleration engine
158 * command list and the data for the engine to deal with.
159 *
160 * - all allocations must be 128bit aligned
161 * - cursors are 64x64x2 bits (1Kbyte)
162 *
163 */
164
165 #define SM501_MEMF_CURSOR (1)
166 #define SM501_MEMF_PANEL (2)
167 #define SM501_MEMF_CRT (4)
168 #define SM501_MEMF_ACCEL (8)
169
sm501_alloc_mem(struct sm501fb_info * inf,struct sm501_mem * mem,unsigned int why,size_t size,u32 smem_len)170 static int sm501_alloc_mem(struct sm501fb_info *inf, struct sm501_mem *mem,
171 unsigned int why, size_t size, u32 smem_len)
172 {
173 struct sm501fb_par *par;
174 struct fb_info *fbi;
175 unsigned int ptr;
176 unsigned int end;
177
178 switch (why) {
179 case SM501_MEMF_CURSOR:
180 ptr = inf->fbmem_len - size;
181 inf->fbmem_len = ptr; /* adjust available memory. */
182 break;
183
184 case SM501_MEMF_PANEL:
185 if (size > inf->fbmem_len)
186 return -ENOMEM;
187
188 ptr = inf->fbmem_len - size;
189 fbi = inf->fb[HEAD_CRT];
190
191 /* round down, some programs such as directfb do not draw
192 * 0,0 correctly unless the start is aligned to a page start.
193 */
194
195 if (ptr > 0)
196 ptr &= ~(PAGE_SIZE - 1);
197
198 if (fbi && ptr < smem_len)
199 return -ENOMEM;
200
201 break;
202
203 case SM501_MEMF_CRT:
204 ptr = 0;
205
206 /* check to see if we have panel memory allocated
207 * which would put an limit on available memory. */
208
209 fbi = inf->fb[HEAD_PANEL];
210 if (fbi) {
211 par = fbi->par;
212 end = par->screen.k_addr ? par->screen.sm_addr : inf->fbmem_len;
213 } else
214 end = inf->fbmem_len;
215
216 if ((ptr + size) > end)
217 return -ENOMEM;
218
219 break;
220
221 case SM501_MEMF_ACCEL:
222 fbi = inf->fb[HEAD_CRT];
223 ptr = fbi ? smem_len : 0;
224
225 fbi = inf->fb[HEAD_PANEL];
226 if (fbi) {
227 par = fbi->par;
228 end = par->screen.sm_addr;
229 } else
230 end = inf->fbmem_len;
231
232 if ((ptr + size) > end)
233 return -ENOMEM;
234
235 break;
236
237 default:
238 return -EINVAL;
239 }
240
241 mem->size = size;
242 mem->sm_addr = ptr;
243 mem->k_addr = inf->fbmem + ptr;
244
245 dev_dbg(inf->dev, "%s: result %08lx, %p - %u, %zd\n",
246 __func__, mem->sm_addr, mem->k_addr, why, size);
247
248 return 0;
249 }
250
251 /* sm501fb_ps_to_hz
252 *
253 * Converts a period in picoseconds to Hz.
254 *
255 * Note, we try to keep this in Hz to minimise rounding with
256 * the limited PLL settings on the SM501.
257 */
258
sm501fb_ps_to_hz(unsigned long psvalue)259 static unsigned long sm501fb_ps_to_hz(unsigned long psvalue)
260 {
261 unsigned long long numerator=1000000000000ULL;
262
263 /* 10^12 / picosecond period gives frequency in Hz */
264 do_div(numerator, psvalue);
265 return (unsigned long)numerator;
266 }
267
268 /* sm501fb_hz_to_ps is identical to the opposite transform */
269
270 #define sm501fb_hz_to_ps(x) sm501fb_ps_to_hz(x)
271
272 /* sm501fb_setup_gamma
273 *
274 * Programs a linear 1.0 gamma ramp in case the gamma
275 * correction is enabled without programming anything else.
276 */
277
sm501fb_setup_gamma(struct sm501fb_info * fbi,unsigned long palette)278 static void sm501fb_setup_gamma(struct sm501fb_info *fbi,
279 unsigned long palette)
280 {
281 unsigned long value = 0;
282 int offset;
283
284 /* set gamma values */
285 for (offset = 0; offset < 256 * 4; offset += 4) {
286 smc501_writel(value, fbi->regs + palette + offset);
287 value += 0x010101; /* Advance RGB by 1,1,1.*/
288 }
289 }
290
291 /* sm501fb_check_var
292 *
293 * check common variables for both panel and crt
294 */
295
sm501fb_check_var(struct fb_var_screeninfo * var,struct fb_info * info)296 static int sm501fb_check_var(struct fb_var_screeninfo *var,
297 struct fb_info *info)
298 {
299 struct sm501fb_par *par = info->par;
300 struct sm501fb_info *sm = par->info;
301 unsigned long tmp;
302
303 /* check we can fit these values into the registers */
304
305 if (var->hsync_len > 255 || var->vsync_len > 63)
306 return -EINVAL;
307
308 /* hdisplay end and hsync start */
309 if ((var->xres + var->right_margin) > 4096)
310 return -EINVAL;
311
312 /* vdisplay end and vsync start */
313 if ((var->yres + var->lower_margin) > 2048)
314 return -EINVAL;
315
316 /* hard limits of device */
317
318 if (h_total(var) > 4096 || v_total(var) > 2048)
319 return -EINVAL;
320
321 /* check our line length is going to be 128 bit aligned */
322
323 tmp = (var->xres * var->bits_per_pixel) / 8;
324 if ((tmp & 15) != 0)
325 return -EINVAL;
326
327 /* check the virtual size */
328
329 if (var->xres_virtual > 4096 || var->yres_virtual > 2048)
330 return -EINVAL;
331
332 /* can cope with 8,16 or 32bpp */
333
334 if (var->bits_per_pixel <= 8)
335 var->bits_per_pixel = 8;
336 else if (var->bits_per_pixel <= 16)
337 var->bits_per_pixel = 16;
338 else if (var->bits_per_pixel == 24)
339 var->bits_per_pixel = 32;
340
341 /* set r/g/b positions and validate bpp */
342 switch(var->bits_per_pixel) {
343 case 8:
344 var->red.length = var->bits_per_pixel;
345 var->red.offset = 0;
346 var->green.length = var->bits_per_pixel;
347 var->green.offset = 0;
348 var->blue.length = var->bits_per_pixel;
349 var->blue.offset = 0;
350 var->transp.length = 0;
351 var->transp.offset = 0;
352
353 break;
354
355 case 16:
356 if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) {
357 var->blue.offset = 11;
358 var->green.offset = 5;
359 var->red.offset = 0;
360 } else {
361 var->red.offset = 11;
362 var->green.offset = 5;
363 var->blue.offset = 0;
364 }
365 var->transp.offset = 0;
366
367 var->red.length = 5;
368 var->green.length = 6;
369 var->blue.length = 5;
370 var->transp.length = 0;
371 break;
372
373 case 32:
374 if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) {
375 var->transp.offset = 0;
376 var->red.offset = 8;
377 var->green.offset = 16;
378 var->blue.offset = 24;
379 } else {
380 var->transp.offset = 24;
381 var->red.offset = 16;
382 var->green.offset = 8;
383 var->blue.offset = 0;
384 }
385
386 var->red.length = 8;
387 var->green.length = 8;
388 var->blue.length = 8;
389 var->transp.length = 0;
390 break;
391
392 default:
393 return -EINVAL;
394 }
395
396 return 0;
397 }
398
399 /*
400 * sm501fb_check_var_crt():
401 *
402 * check the parameters for the CRT head, and either bring them
403 * back into range, or return -EINVAL.
404 */
405
sm501fb_check_var_crt(struct fb_var_screeninfo * var,struct fb_info * info)406 static int sm501fb_check_var_crt(struct fb_var_screeninfo *var,
407 struct fb_info *info)
408 {
409 return sm501fb_check_var(var, info);
410 }
411
412 /* sm501fb_check_var_pnl():
413 *
414 * check the parameters for the CRT head, and either bring them
415 * back into range, or return -EINVAL.
416 */
417
sm501fb_check_var_pnl(struct fb_var_screeninfo * var,struct fb_info * info)418 static int sm501fb_check_var_pnl(struct fb_var_screeninfo *var,
419 struct fb_info *info)
420 {
421 return sm501fb_check_var(var, info);
422 }
423
424 /* sm501fb_set_par_common
425 *
426 * set common registers for framebuffers
427 */
428
sm501fb_set_par_common(struct fb_info * info,struct fb_var_screeninfo * var)429 static int sm501fb_set_par_common(struct fb_info *info,
430 struct fb_var_screeninfo *var)
431 {
432 struct sm501fb_par *par = info->par;
433 struct sm501fb_info *fbi = par->info;
434 unsigned long pixclock; /* pixelclock in Hz */
435 unsigned long sm501pixclock; /* pixelclock the 501 can achieve in Hz */
436 unsigned int mem_type;
437 unsigned int clock_type;
438 unsigned int head_addr;
439 unsigned int smem_len;
440
441 dev_dbg(fbi->dev, "%s: %dx%d, bpp = %d, virtual %dx%d\n",
442 __func__, var->xres, var->yres, var->bits_per_pixel,
443 var->xres_virtual, var->yres_virtual);
444
445 switch (par->head) {
446 case HEAD_CRT:
447 mem_type = SM501_MEMF_CRT;
448 clock_type = SM501_CLOCK_V2XCLK;
449 head_addr = SM501_DC_CRT_FB_ADDR;
450 break;
451
452 case HEAD_PANEL:
453 mem_type = SM501_MEMF_PANEL;
454 clock_type = SM501_CLOCK_P2XCLK;
455 head_addr = SM501_DC_PANEL_FB_ADDR;
456 break;
457
458 default:
459 mem_type = 0; /* stop compiler warnings */
460 head_addr = 0;
461 clock_type = 0;
462 }
463
464 switch (var->bits_per_pixel) {
465 case 8:
466 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
467 break;
468
469 case 16:
470 info->fix.visual = FB_VISUAL_TRUECOLOR;
471 break;
472
473 case 32:
474 info->fix.visual = FB_VISUAL_TRUECOLOR;
475 break;
476 }
477
478 /* allocate fb memory within 501 */
479 info->fix.line_length = (var->xres_virtual * var->bits_per_pixel)/8;
480 smem_len = info->fix.line_length * var->yres_virtual;
481
482 dev_dbg(fbi->dev, "%s: line length = %u\n", __func__,
483 info->fix.line_length);
484
485 if (sm501_alloc_mem(fbi, &par->screen, mem_type, smem_len, smem_len)) {
486 dev_err(fbi->dev, "no memory available\n");
487 return -ENOMEM;
488 }
489
490 mutex_lock(&info->mm_lock);
491 info->fix.smem_start = fbi->fbmem_res->start + par->screen.sm_addr;
492 info->fix.smem_len = smem_len;
493 mutex_unlock(&info->mm_lock);
494
495 info->screen_base = fbi->fbmem + par->screen.sm_addr;
496 info->screen_size = info->fix.smem_len;
497
498 /* set start of framebuffer to the screen */
499
500 smc501_writel(par->screen.sm_addr | SM501_ADDR_FLIP,
501 fbi->regs + head_addr);
502
503 /* program CRT clock */
504
505 pixclock = sm501fb_ps_to_hz(var->pixclock);
506
507 sm501pixclock = sm501_set_clock(fbi->dev->parent, clock_type,
508 pixclock);
509
510 /* update fb layer with actual clock used */
511 var->pixclock = sm501fb_hz_to_ps(sm501pixclock);
512
513 dev_dbg(fbi->dev, "%s: pixclock(ps) = %u, pixclock(Hz) = %lu, "
514 "sm501pixclock = %lu, error = %ld%%\n",
515 __func__, var->pixclock, pixclock, sm501pixclock,
516 ((pixclock - sm501pixclock)*100)/pixclock);
517
518 return 0;
519 }
520
521 /* sm501fb_set_par_geometry
522 *
523 * set the geometry registers for specified framebuffer.
524 */
525
sm501fb_set_par_geometry(struct fb_info * info,struct fb_var_screeninfo * var)526 static void sm501fb_set_par_geometry(struct fb_info *info,
527 struct fb_var_screeninfo *var)
528 {
529 struct sm501fb_par *par = info->par;
530 struct sm501fb_info *fbi = par->info;
531 void __iomem *base = fbi->regs;
532 unsigned long reg;
533
534 if (par->head == HEAD_CRT)
535 base += SM501_DC_CRT_H_TOT;
536 else
537 base += SM501_DC_PANEL_H_TOT;
538
539 /* set framebuffer width and display width */
540
541 reg = info->fix.line_length;
542 reg |= ((var->xres * var->bits_per_pixel)/8) << 16;
543
544 smc501_writel(reg, fbi->regs + (par->head == HEAD_CRT ?
545 SM501_DC_CRT_FB_OFFSET : SM501_DC_PANEL_FB_OFFSET));
546
547 /* program horizontal total */
548
549 reg = (h_total(var) - 1) << 16;
550 reg |= (var->xres - 1);
551
552 smc501_writel(reg, base + SM501_OFF_DC_H_TOT);
553
554 /* program horizontal sync */
555
556 reg = var->hsync_len << 16;
557 reg |= var->xres + var->right_margin - 1;
558
559 smc501_writel(reg, base + SM501_OFF_DC_H_SYNC);
560
561 /* program vertical total */
562
563 reg = (v_total(var) - 1) << 16;
564 reg |= (var->yres - 1);
565
566 smc501_writel(reg, base + SM501_OFF_DC_V_TOT);
567
568 /* program vertical sync */
569 reg = var->vsync_len << 16;
570 reg |= var->yres + var->lower_margin - 1;
571
572 smc501_writel(reg, base + SM501_OFF_DC_V_SYNC);
573 }
574
575 /* sm501fb_pan_crt
576 *
577 * pan the CRT display output within an virtual framebuffer
578 */
579
sm501fb_pan_crt(struct fb_var_screeninfo * var,struct fb_info * info)580 static int sm501fb_pan_crt(struct fb_var_screeninfo *var,
581 struct fb_info *info)
582 {
583 struct sm501fb_par *par = info->par;
584 struct sm501fb_info *fbi = par->info;
585 unsigned int bytes_pixel = info->var.bits_per_pixel / 8;
586 unsigned long reg;
587 unsigned long xoffs;
588
589 xoffs = var->xoffset * bytes_pixel;
590
591 reg = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL);
592
593 reg &= ~SM501_DC_CRT_CONTROL_PIXEL_MASK;
594 reg |= ((xoffs & 15) / bytes_pixel) << 4;
595 smc501_writel(reg, fbi->regs + SM501_DC_CRT_CONTROL);
596
597 reg = (par->screen.sm_addr + xoffs +
598 var->yoffset * info->fix.line_length);
599 smc501_writel(reg | SM501_ADDR_FLIP, fbi->regs + SM501_DC_CRT_FB_ADDR);
600
601 sm501fb_sync_regs(fbi);
602 return 0;
603 }
604
605 /* sm501fb_pan_pnl
606 *
607 * pan the panel display output within an virtual framebuffer
608 */
609
sm501fb_pan_pnl(struct fb_var_screeninfo * var,struct fb_info * info)610 static int sm501fb_pan_pnl(struct fb_var_screeninfo *var,
611 struct fb_info *info)
612 {
613 struct sm501fb_par *par = info->par;
614 struct sm501fb_info *fbi = par->info;
615 unsigned long reg;
616
617 reg = var->xoffset | (info->var.xres_virtual << 16);
618 smc501_writel(reg, fbi->regs + SM501_DC_PANEL_FB_WIDTH);
619
620 reg = var->yoffset | (info->var.yres_virtual << 16);
621 smc501_writel(reg, fbi->regs + SM501_DC_PANEL_FB_HEIGHT);
622
623 sm501fb_sync_regs(fbi);
624 return 0;
625 }
626
627 /* sm501fb_set_par_crt
628 *
629 * Set the CRT video mode from the fb_info structure
630 */
631
sm501fb_set_par_crt(struct fb_info * info)632 static int sm501fb_set_par_crt(struct fb_info *info)
633 {
634 struct sm501fb_par *par = info->par;
635 struct sm501fb_info *fbi = par->info;
636 struct fb_var_screeninfo *var = &info->var;
637 unsigned long control; /* control register */
638 int ret;
639
640 /* activate new configuration */
641
642 dev_dbg(fbi->dev, "%s(%p)\n", __func__, info);
643
644 /* enable CRT DAC - note 0 is on!*/
645 sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER);
646
647 control = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL);
648
649 control &= (SM501_DC_CRT_CONTROL_PIXEL_MASK |
650 SM501_DC_CRT_CONTROL_GAMMA |
651 SM501_DC_CRT_CONTROL_BLANK |
652 SM501_DC_CRT_CONTROL_SEL |
653 SM501_DC_CRT_CONTROL_CP |
654 SM501_DC_CRT_CONTROL_TVP);
655
656 /* set the sync polarities before we check data source */
657
658 if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0)
659 control |= SM501_DC_CRT_CONTROL_HSP;
660
661 if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0)
662 control |= SM501_DC_CRT_CONTROL_VSP;
663
664 if ((control & SM501_DC_CRT_CONTROL_SEL) == 0) {
665 /* the head is displaying panel data... */
666
667 sm501_alloc_mem(fbi, &par->screen, SM501_MEMF_CRT, 0,
668 info->fix.smem_len);
669 goto out_update;
670 }
671
672 ret = sm501fb_set_par_common(info, var);
673 if (ret) {
674 dev_err(fbi->dev, "failed to set common parameters\n");
675 return ret;
676 }
677
678 sm501fb_pan_crt(var, info);
679 sm501fb_set_par_geometry(info, var);
680
681 control |= SM501_FIFO_3; /* fill if >3 free slots */
682
683 switch(var->bits_per_pixel) {
684 case 8:
685 control |= SM501_DC_CRT_CONTROL_8BPP;
686 break;
687
688 case 16:
689 control |= SM501_DC_CRT_CONTROL_16BPP;
690 sm501fb_setup_gamma(fbi, SM501_DC_CRT_PALETTE);
691 break;
692
693 case 32:
694 control |= SM501_DC_CRT_CONTROL_32BPP;
695 sm501fb_setup_gamma(fbi, SM501_DC_CRT_PALETTE);
696 break;
697
698 default:
699 BUG();
700 }
701
702 control |= SM501_DC_CRT_CONTROL_SEL; /* CRT displays CRT data */
703 control |= SM501_DC_CRT_CONTROL_TE; /* enable CRT timing */
704 control |= SM501_DC_CRT_CONTROL_ENABLE; /* enable CRT plane */
705
706 out_update:
707 dev_dbg(fbi->dev, "new control is %08lx\n", control);
708
709 smc501_writel(control, fbi->regs + SM501_DC_CRT_CONTROL);
710 sm501fb_sync_regs(fbi);
711
712 return 0;
713 }
714
sm501fb_panel_power(struct sm501fb_info * fbi,int to)715 static void sm501fb_panel_power(struct sm501fb_info *fbi, int to)
716 {
717 unsigned long control;
718 void __iomem *ctrl_reg = fbi->regs + SM501_DC_PANEL_CONTROL;
719 struct sm501_platdata_fbsub *pd = fbi->pdata->fb_pnl;
720
721 control = smc501_readl(ctrl_reg);
722
723 if (to && (control & SM501_DC_PANEL_CONTROL_VDD) == 0) {
724 /* enable panel power */
725
726 control |= SM501_DC_PANEL_CONTROL_VDD; /* FPVDDEN */
727 smc501_writel(control, ctrl_reg);
728 sm501fb_sync_regs(fbi);
729 mdelay(10);
730
731 control |= SM501_DC_PANEL_CONTROL_DATA; /* DATA */
732 smc501_writel(control, ctrl_reg);
733 sm501fb_sync_regs(fbi);
734 mdelay(10);
735
736 /* VBIASEN */
737
738 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_VBIASEN)) {
739 if (pd->flags & SM501FB_FLAG_PANEL_INV_VBIASEN)
740 control &= ~SM501_DC_PANEL_CONTROL_BIAS;
741 else
742 control |= SM501_DC_PANEL_CONTROL_BIAS;
743
744 smc501_writel(control, ctrl_reg);
745 sm501fb_sync_regs(fbi);
746 mdelay(10);
747 }
748
749 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_FPEN)) {
750 if (pd->flags & SM501FB_FLAG_PANEL_INV_FPEN)
751 control &= ~SM501_DC_PANEL_CONTROL_FPEN;
752 else
753 control |= SM501_DC_PANEL_CONTROL_FPEN;
754
755 smc501_writel(control, ctrl_reg);
756 sm501fb_sync_regs(fbi);
757 mdelay(10);
758 }
759 } else if (!to && (control & SM501_DC_PANEL_CONTROL_VDD) != 0) {
760 /* disable panel power */
761 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_FPEN)) {
762 if (pd->flags & SM501FB_FLAG_PANEL_INV_FPEN)
763 control |= SM501_DC_PANEL_CONTROL_FPEN;
764 else
765 control &= ~SM501_DC_PANEL_CONTROL_FPEN;
766
767 smc501_writel(control, ctrl_reg);
768 sm501fb_sync_regs(fbi);
769 mdelay(10);
770 }
771
772 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_VBIASEN)) {
773 if (pd->flags & SM501FB_FLAG_PANEL_INV_VBIASEN)
774 control |= SM501_DC_PANEL_CONTROL_BIAS;
775 else
776 control &= ~SM501_DC_PANEL_CONTROL_BIAS;
777
778 smc501_writel(control, ctrl_reg);
779 sm501fb_sync_regs(fbi);
780 mdelay(10);
781 }
782
783 control &= ~SM501_DC_PANEL_CONTROL_DATA;
784 smc501_writel(control, ctrl_reg);
785 sm501fb_sync_regs(fbi);
786 mdelay(10);
787
788 control &= ~SM501_DC_PANEL_CONTROL_VDD;
789 smc501_writel(control, ctrl_reg);
790 sm501fb_sync_regs(fbi);
791 mdelay(10);
792 }
793
794 sm501fb_sync_regs(fbi);
795 }
796
797 /* sm501fb_set_par_pnl
798 *
799 * Set the panel video mode from the fb_info structure
800 */
801
sm501fb_set_par_pnl(struct fb_info * info)802 static int sm501fb_set_par_pnl(struct fb_info *info)
803 {
804 struct sm501fb_par *par = info->par;
805 struct sm501fb_info *fbi = par->info;
806 struct fb_var_screeninfo *var = &info->var;
807 unsigned long control;
808 unsigned long reg;
809 int ret;
810
811 dev_dbg(fbi->dev, "%s(%p)\n", __func__, info);
812
813 /* activate this new configuration */
814
815 ret = sm501fb_set_par_common(info, var);
816 if (ret)
817 return ret;
818
819 sm501fb_pan_pnl(var, info);
820 sm501fb_set_par_geometry(info, var);
821
822 /* update control register */
823
824 control = smc501_readl(fbi->regs + SM501_DC_PANEL_CONTROL);
825 control &= (SM501_DC_PANEL_CONTROL_GAMMA |
826 SM501_DC_PANEL_CONTROL_VDD |
827 SM501_DC_PANEL_CONTROL_DATA |
828 SM501_DC_PANEL_CONTROL_BIAS |
829 SM501_DC_PANEL_CONTROL_FPEN |
830 SM501_DC_PANEL_CONTROL_CP |
831 SM501_DC_PANEL_CONTROL_CK |
832 SM501_DC_PANEL_CONTROL_HP |
833 SM501_DC_PANEL_CONTROL_VP |
834 SM501_DC_PANEL_CONTROL_HPD |
835 SM501_DC_PANEL_CONTROL_VPD);
836
837 control |= SM501_FIFO_3; /* fill if >3 free slots */
838
839 switch(var->bits_per_pixel) {
840 case 8:
841 control |= SM501_DC_PANEL_CONTROL_8BPP;
842 break;
843
844 case 16:
845 control |= SM501_DC_PANEL_CONTROL_16BPP;
846 sm501fb_setup_gamma(fbi, SM501_DC_PANEL_PALETTE);
847 break;
848
849 case 32:
850 control |= SM501_DC_PANEL_CONTROL_32BPP;
851 sm501fb_setup_gamma(fbi, SM501_DC_PANEL_PALETTE);
852 break;
853
854 default:
855 BUG();
856 }
857
858 smc501_writel(0x0, fbi->regs + SM501_DC_PANEL_PANNING_CONTROL);
859
860 /* panel plane top left and bottom right location */
861
862 smc501_writel(0x00, fbi->regs + SM501_DC_PANEL_TL_LOC);
863
864 reg = var->xres - 1;
865 reg |= (var->yres - 1) << 16;
866
867 smc501_writel(reg, fbi->regs + SM501_DC_PANEL_BR_LOC);
868
869 /* program panel control register */
870
871 control |= SM501_DC_PANEL_CONTROL_TE; /* enable PANEL timing */
872 control |= SM501_DC_PANEL_CONTROL_EN; /* enable PANEL gfx plane */
873
874 if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0)
875 control |= SM501_DC_PANEL_CONTROL_HSP;
876
877 if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0)
878 control |= SM501_DC_PANEL_CONTROL_VSP;
879
880 smc501_writel(control, fbi->regs + SM501_DC_PANEL_CONTROL);
881 sm501fb_sync_regs(fbi);
882
883 /* ensure the panel interface is not tristated at this point */
884
885 sm501_modify_reg(fbi->dev->parent, SM501_SYSTEM_CONTROL,
886 0, SM501_SYSCTRL_PANEL_TRISTATE);
887
888 /* power the panel up */
889 sm501fb_panel_power(fbi, 1);
890 return 0;
891 }
892
893
894 /* chan_to_field
895 *
896 * convert a colour value into a field position
897 *
898 * from pxafb.c
899 */
900
chan_to_field(unsigned int chan,struct fb_bitfield * bf)901 static inline unsigned int chan_to_field(unsigned int chan,
902 struct fb_bitfield *bf)
903 {
904 chan &= 0xffff;
905 chan >>= 16 - bf->length;
906 return chan << bf->offset;
907 }
908
909 /* sm501fb_setcolreg
910 *
911 * set the colour mapping for modes that support palettised data
912 */
913
sm501fb_setcolreg(unsigned regno,unsigned red,unsigned green,unsigned blue,unsigned transp,struct fb_info * info)914 static int sm501fb_setcolreg(unsigned regno,
915 unsigned red, unsigned green, unsigned blue,
916 unsigned transp, struct fb_info *info)
917 {
918 struct sm501fb_par *par = info->par;
919 struct sm501fb_info *fbi = par->info;
920 void __iomem *base = fbi->regs;
921 unsigned int val;
922
923 if (par->head == HEAD_CRT)
924 base += SM501_DC_CRT_PALETTE;
925 else
926 base += SM501_DC_PANEL_PALETTE;
927
928 switch (info->fix.visual) {
929 case FB_VISUAL_TRUECOLOR:
930 /* true-colour, use pseuo-palette */
931
932 if (regno < 16) {
933 u32 *pal = par->pseudo_palette;
934
935 val = chan_to_field(red, &info->var.red);
936 val |= chan_to_field(green, &info->var.green);
937 val |= chan_to_field(blue, &info->var.blue);
938
939 pal[regno] = val;
940 }
941 break;
942
943 case FB_VISUAL_PSEUDOCOLOR:
944 if (regno < 256) {
945 val = (red >> 8) << 16;
946 val |= (green >> 8) << 8;
947 val |= blue >> 8;
948
949 smc501_writel(val, base + (regno * 4));
950 }
951
952 break;
953
954 default:
955 return 1; /* unknown type */
956 }
957
958 return 0;
959 }
960
961 /* sm501fb_blank_pnl
962 *
963 * Blank or un-blank the panel interface
964 */
965
sm501fb_blank_pnl(int blank_mode,struct fb_info * info)966 static int sm501fb_blank_pnl(int blank_mode, struct fb_info *info)
967 {
968 struct sm501fb_par *par = info->par;
969 struct sm501fb_info *fbi = par->info;
970
971 dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info);
972
973 switch (blank_mode) {
974 case FB_BLANK_POWERDOWN:
975 sm501fb_panel_power(fbi, 0);
976 break;
977
978 case FB_BLANK_UNBLANK:
979 sm501fb_panel_power(fbi, 1);
980 break;
981
982 case FB_BLANK_NORMAL:
983 case FB_BLANK_VSYNC_SUSPEND:
984 case FB_BLANK_HSYNC_SUSPEND:
985 default:
986 return 1;
987 }
988
989 return 0;
990 }
991
992 /* sm501fb_blank_crt
993 *
994 * Blank or un-blank the crt interface
995 */
996
sm501fb_blank_crt(int blank_mode,struct fb_info * info)997 static int sm501fb_blank_crt(int blank_mode, struct fb_info *info)
998 {
999 struct sm501fb_par *par = info->par;
1000 struct sm501fb_info *fbi = par->info;
1001 unsigned long ctrl;
1002
1003 dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info);
1004
1005 ctrl = smc501_readl(fbi->regs + SM501_DC_CRT_CONTROL);
1006
1007 switch (blank_mode) {
1008 case FB_BLANK_POWERDOWN:
1009 ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE;
1010 sm501_misc_control(fbi->dev->parent, SM501_MISC_DAC_POWER, 0);
1011 /* fall through */
1012
1013 case FB_BLANK_NORMAL:
1014 ctrl |= SM501_DC_CRT_CONTROL_BLANK;
1015 break;
1016
1017 case FB_BLANK_UNBLANK:
1018 ctrl &= ~SM501_DC_CRT_CONTROL_BLANK;
1019 ctrl |= SM501_DC_CRT_CONTROL_ENABLE;
1020 sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER);
1021 break;
1022
1023 case FB_BLANK_VSYNC_SUSPEND:
1024 case FB_BLANK_HSYNC_SUSPEND:
1025 default:
1026 return 1;
1027
1028 }
1029
1030 smc501_writel(ctrl, fbi->regs + SM501_DC_CRT_CONTROL);
1031 sm501fb_sync_regs(fbi);
1032
1033 return 0;
1034 }
1035
1036 /* sm501fb_cursor
1037 *
1038 * set or change the hardware cursor parameters
1039 */
1040
sm501fb_cursor(struct fb_info * info,struct fb_cursor * cursor)1041 static int sm501fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
1042 {
1043 struct sm501fb_par *par = info->par;
1044 struct sm501fb_info *fbi = par->info;
1045 void __iomem *base = fbi->regs;
1046 unsigned long hwc_addr;
1047 unsigned long fg, bg;
1048
1049 dev_dbg(fbi->dev, "%s(%p,%p)\n", __func__, info, cursor);
1050
1051 if (par->head == HEAD_CRT)
1052 base += SM501_DC_CRT_HWC_BASE;
1053 else
1054 base += SM501_DC_PANEL_HWC_BASE;
1055
1056 /* check not being asked to exceed capabilities */
1057
1058 if (cursor->image.width > 64)
1059 return -EINVAL;
1060
1061 if (cursor->image.height > 64)
1062 return -EINVAL;
1063
1064 if (cursor->image.depth > 1)
1065 return -EINVAL;
1066
1067 hwc_addr = smc501_readl(base + SM501_OFF_HWC_ADDR);
1068
1069 if (cursor->enable)
1070 smc501_writel(hwc_addr | SM501_HWC_EN,
1071 base + SM501_OFF_HWC_ADDR);
1072 else
1073 smc501_writel(hwc_addr & ~SM501_HWC_EN,
1074 base + SM501_OFF_HWC_ADDR);
1075
1076 /* set data */
1077 if (cursor->set & FB_CUR_SETPOS) {
1078 unsigned int x = cursor->image.dx;
1079 unsigned int y = cursor->image.dy;
1080
1081 if (x >= 2048 || y >= 2048 )
1082 return -EINVAL;
1083
1084 dev_dbg(fbi->dev, "set position %d,%d\n", x, y);
1085
1086 //y += cursor->image.height;
1087
1088 smc501_writel(x | (y << 16), base + SM501_OFF_HWC_LOC);
1089 }
1090
1091 if (cursor->set & FB_CUR_SETCMAP) {
1092 unsigned int bg_col = cursor->image.bg_color;
1093 unsigned int fg_col = cursor->image.fg_color;
1094
1095 dev_dbg(fbi->dev, "%s: update cmap (%08x,%08x)\n",
1096 __func__, bg_col, fg_col);
1097
1098 bg = ((info->cmap.red[bg_col] & 0xF8) << 8) |
1099 ((info->cmap.green[bg_col] & 0xFC) << 3) |
1100 ((info->cmap.blue[bg_col] & 0xF8) >> 3);
1101
1102 fg = ((info->cmap.red[fg_col] & 0xF8) << 8) |
1103 ((info->cmap.green[fg_col] & 0xFC) << 3) |
1104 ((info->cmap.blue[fg_col] & 0xF8) >> 3);
1105
1106 dev_dbg(fbi->dev, "fgcol %08lx, bgcol %08lx\n", fg, bg);
1107
1108 smc501_writel(bg, base + SM501_OFF_HWC_COLOR_1_2);
1109 smc501_writel(fg, base + SM501_OFF_HWC_COLOR_3);
1110 }
1111
1112 if (cursor->set & FB_CUR_SETSIZE ||
1113 cursor->set & (FB_CUR_SETIMAGE | FB_CUR_SETSHAPE)) {
1114 /* SM501 cursor is a two bpp 64x64 bitmap this routine
1115 * clears it to transparent then combines the cursor
1116 * shape plane with the colour plane to set the
1117 * cursor */
1118 int x, y;
1119 const unsigned char *pcol = cursor->image.data;
1120 const unsigned char *pmsk = cursor->mask;
1121 void __iomem *dst = par->cursor.k_addr;
1122 unsigned char dcol = 0;
1123 unsigned char dmsk = 0;
1124 unsigned int op;
1125
1126 dev_dbg(fbi->dev, "%s: setting shape (%d,%d)\n",
1127 __func__, cursor->image.width, cursor->image.height);
1128
1129 for (op = 0; op < (64*64*2)/8; op+=4)
1130 smc501_writel(0x0, dst + op);
1131
1132 for (y = 0; y < cursor->image.height; y++) {
1133 for (x = 0; x < cursor->image.width; x++) {
1134 if ((x % 8) == 0) {
1135 dcol = *pcol++;
1136 dmsk = *pmsk++;
1137 } else {
1138 dcol >>= 1;
1139 dmsk >>= 1;
1140 }
1141
1142 if (dmsk & 1) {
1143 op = (dcol & 1) ? 1 : 3;
1144 op <<= ((x % 4) * 2);
1145
1146 op |= readb(dst + (x / 4));
1147 writeb(op, dst + (x / 4));
1148 }
1149 }
1150 dst += (64*2)/8;
1151 }
1152 }
1153
1154 sm501fb_sync_regs(fbi); /* ensure cursor data flushed */
1155 return 0;
1156 }
1157
1158 /* sm501fb_crtsrc_show
1159 *
1160 * device attribute code to show where the crt output is sourced from
1161 */
1162
sm501fb_crtsrc_show(struct device * dev,struct device_attribute * attr,char * buf)1163 static ssize_t sm501fb_crtsrc_show(struct device *dev,
1164 struct device_attribute *attr, char *buf)
1165 {
1166 struct sm501fb_info *info = dev_get_drvdata(dev);
1167 unsigned long ctrl;
1168
1169 ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
1170 ctrl &= SM501_DC_CRT_CONTROL_SEL;
1171
1172 return snprintf(buf, PAGE_SIZE, "%s\n", ctrl ? "crt" : "panel");
1173 }
1174
1175 /* sm501fb_crtsrc_show
1176 *
1177 * device attribute code to set where the crt output is sourced from
1178 */
1179
sm501fb_crtsrc_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t len)1180 static ssize_t sm501fb_crtsrc_store(struct device *dev,
1181 struct device_attribute *attr,
1182 const char *buf, size_t len)
1183 {
1184 struct sm501fb_info *info = dev_get_drvdata(dev);
1185 enum sm501_controller head;
1186 unsigned long ctrl;
1187
1188 if (len < 1)
1189 return -EINVAL;
1190
1191 if (strncasecmp(buf, "crt", 3) == 0)
1192 head = HEAD_CRT;
1193 else if (strncasecmp(buf, "panel", 5) == 0)
1194 head = HEAD_PANEL;
1195 else
1196 return -EINVAL;
1197
1198 dev_info(dev, "setting crt source to head %d\n", head);
1199
1200 ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
1201
1202 if (head == HEAD_CRT) {
1203 ctrl |= SM501_DC_CRT_CONTROL_SEL;
1204 ctrl |= SM501_DC_CRT_CONTROL_ENABLE;
1205 ctrl |= SM501_DC_CRT_CONTROL_TE;
1206 } else {
1207 ctrl &= ~SM501_DC_CRT_CONTROL_SEL;
1208 ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE;
1209 ctrl &= ~SM501_DC_CRT_CONTROL_TE;
1210 }
1211
1212 smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1213 sm501fb_sync_regs(info);
1214
1215 return len;
1216 }
1217
1218 /* Prepare the device_attr for registration with sysfs later */
1219 static DEVICE_ATTR(crt_src, 0664, sm501fb_crtsrc_show, sm501fb_crtsrc_store);
1220
1221 /* sm501fb_show_regs
1222 *
1223 * show the primary sm501 registers
1224 */
sm501fb_show_regs(struct sm501fb_info * info,char * ptr,unsigned int start,unsigned int len)1225 static int sm501fb_show_regs(struct sm501fb_info *info, char *ptr,
1226 unsigned int start, unsigned int len)
1227 {
1228 void __iomem *mem = info->regs;
1229 char *buf = ptr;
1230 unsigned int reg;
1231
1232 for (reg = start; reg < (len + start); reg += 4)
1233 ptr += sprintf(ptr, "%08x = %08x\n", reg,
1234 smc501_readl(mem + reg));
1235
1236 return ptr - buf;
1237 }
1238
1239 /* sm501fb_debug_show_crt
1240 *
1241 * show the crt control and cursor registers
1242 */
1243
sm501fb_debug_show_crt(struct device * dev,struct device_attribute * attr,char * buf)1244 static ssize_t sm501fb_debug_show_crt(struct device *dev,
1245 struct device_attribute *attr, char *buf)
1246 {
1247 struct sm501fb_info *info = dev_get_drvdata(dev);
1248 char *ptr = buf;
1249
1250 ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_CONTROL, 0x40);
1251 ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_HWC_BASE, 0x10);
1252
1253 return ptr - buf;
1254 }
1255
1256 static DEVICE_ATTR(fbregs_crt, 0444, sm501fb_debug_show_crt, NULL);
1257
1258 /* sm501fb_debug_show_pnl
1259 *
1260 * show the panel control and cursor registers
1261 */
1262
sm501fb_debug_show_pnl(struct device * dev,struct device_attribute * attr,char * buf)1263 static ssize_t sm501fb_debug_show_pnl(struct device *dev,
1264 struct device_attribute *attr, char *buf)
1265 {
1266 struct sm501fb_info *info = dev_get_drvdata(dev);
1267 char *ptr = buf;
1268
1269 ptr += sm501fb_show_regs(info, ptr, 0x0, 0x40);
1270 ptr += sm501fb_show_regs(info, ptr, SM501_DC_PANEL_HWC_BASE, 0x10);
1271
1272 return ptr - buf;
1273 }
1274
1275 static DEVICE_ATTR(fbregs_pnl, 0444, sm501fb_debug_show_pnl, NULL);
1276
1277 /* acceleration operations */
sm501fb_sync(struct fb_info * info)1278 static int sm501fb_sync(struct fb_info *info)
1279 {
1280 int count = 1000000;
1281 struct sm501fb_par *par = info->par;
1282 struct sm501fb_info *fbi = par->info;
1283
1284 /* wait for the 2d engine to be ready */
1285 while ((count > 0) &&
1286 (smc501_readl(fbi->regs + SM501_SYSTEM_CONTROL) &
1287 SM501_SYSCTRL_2D_ENGINE_STATUS) != 0)
1288 count--;
1289
1290 if (count <= 0) {
1291 dev_err(info->dev, "Timeout waiting for 2d engine sync\n");
1292 return 1;
1293 }
1294 return 0;
1295 }
1296
sm501fb_copyarea(struct fb_info * info,const struct fb_copyarea * area)1297 static void sm501fb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
1298 {
1299 struct sm501fb_par *par = info->par;
1300 struct sm501fb_info *fbi = par->info;
1301 int width = area->width;
1302 int height = area->height;
1303 int sx = area->sx;
1304 int sy = area->sy;
1305 int dx = area->dx;
1306 int dy = area->dy;
1307 unsigned long rtl = 0;
1308
1309 /* source clip */
1310 if ((sx >= info->var.xres_virtual) ||
1311 (sy >= info->var.yres_virtual))
1312 /* source Area not within virtual screen, skipping */
1313 return;
1314 if ((sx + width) >= info->var.xres_virtual)
1315 width = info->var.xres_virtual - sx - 1;
1316 if ((sy + height) >= info->var.yres_virtual)
1317 height = info->var.yres_virtual - sy - 1;
1318
1319 /* dest clip */
1320 if ((dx >= info->var.xres_virtual) ||
1321 (dy >= info->var.yres_virtual))
1322 /* Destination Area not within virtual screen, skipping */
1323 return;
1324 if ((dx + width) >= info->var.xres_virtual)
1325 width = info->var.xres_virtual - dx - 1;
1326 if ((dy + height) >= info->var.yres_virtual)
1327 height = info->var.yres_virtual - dy - 1;
1328
1329 if ((sx < dx) || (sy < dy)) {
1330 rtl = 1 << 27;
1331 sx += width - 1;
1332 dx += width - 1;
1333 sy += height - 1;
1334 dy += height - 1;
1335 }
1336
1337 if (sm501fb_sync(info))
1338 return;
1339
1340 /* set the base addresses */
1341 smc501_writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE);
1342 smc501_writel(par->screen.sm_addr,
1343 fbi->regs2d + SM501_2D_DESTINATION_BASE);
1344
1345 /* set the window width */
1346 smc501_writel((info->var.xres << 16) | info->var.xres,
1347 fbi->regs2d + SM501_2D_WINDOW_WIDTH);
1348
1349 /* set window stride */
1350 smc501_writel((info->var.xres_virtual << 16) | info->var.xres_virtual,
1351 fbi->regs2d + SM501_2D_PITCH);
1352
1353 /* set data format */
1354 switch (info->var.bits_per_pixel) {
1355 case 8:
1356 smc501_writel(0, fbi->regs2d + SM501_2D_STRETCH);
1357 break;
1358 case 16:
1359 smc501_writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH);
1360 break;
1361 case 32:
1362 smc501_writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH);
1363 break;
1364 }
1365
1366 /* 2d compare mask */
1367 smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK);
1368
1369 /* 2d mask */
1370 smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_MASK);
1371
1372 /* source and destination x y */
1373 smc501_writel((sx << 16) | sy, fbi->regs2d + SM501_2D_SOURCE);
1374 smc501_writel((dx << 16) | dy, fbi->regs2d + SM501_2D_DESTINATION);
1375
1376 /* w/h */
1377 smc501_writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION);
1378
1379 /* do area move */
1380 smc501_writel(0x800000cc | rtl, fbi->regs2d + SM501_2D_CONTROL);
1381 }
1382
sm501fb_fillrect(struct fb_info * info,const struct fb_fillrect * rect)1383 static void sm501fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
1384 {
1385 struct sm501fb_par *par = info->par;
1386 struct sm501fb_info *fbi = par->info;
1387 int width = rect->width, height = rect->height;
1388
1389 if ((rect->dx >= info->var.xres_virtual) ||
1390 (rect->dy >= info->var.yres_virtual))
1391 /* Rectangle not within virtual screen, skipping */
1392 return;
1393 if ((rect->dx + width) >= info->var.xres_virtual)
1394 width = info->var.xres_virtual - rect->dx - 1;
1395 if ((rect->dy + height) >= info->var.yres_virtual)
1396 height = info->var.yres_virtual - rect->dy - 1;
1397
1398 if (sm501fb_sync(info))
1399 return;
1400
1401 /* set the base addresses */
1402 smc501_writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE);
1403 smc501_writel(par->screen.sm_addr,
1404 fbi->regs2d + SM501_2D_DESTINATION_BASE);
1405
1406 /* set the window width */
1407 smc501_writel((info->var.xres << 16) | info->var.xres,
1408 fbi->regs2d + SM501_2D_WINDOW_WIDTH);
1409
1410 /* set window stride */
1411 smc501_writel((info->var.xres_virtual << 16) | info->var.xres_virtual,
1412 fbi->regs2d + SM501_2D_PITCH);
1413
1414 /* set data format */
1415 switch (info->var.bits_per_pixel) {
1416 case 8:
1417 smc501_writel(0, fbi->regs2d + SM501_2D_STRETCH);
1418 break;
1419 case 16:
1420 smc501_writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH);
1421 break;
1422 case 32:
1423 smc501_writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH);
1424 break;
1425 }
1426
1427 /* 2d compare mask */
1428 smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK);
1429
1430 /* 2d mask */
1431 smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_MASK);
1432
1433 /* colour */
1434 smc501_writel(rect->color, fbi->regs2d + SM501_2D_FOREGROUND);
1435
1436 /* x y */
1437 smc501_writel((rect->dx << 16) | rect->dy,
1438 fbi->regs2d + SM501_2D_DESTINATION);
1439
1440 /* w/h */
1441 smc501_writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION);
1442
1443 /* do rectangle fill */
1444 smc501_writel(0x800100cc, fbi->regs2d + SM501_2D_CONTROL);
1445 }
1446
1447
1448 static struct fb_ops sm501fb_ops_crt = {
1449 .owner = THIS_MODULE,
1450 .fb_check_var = sm501fb_check_var_crt,
1451 .fb_set_par = sm501fb_set_par_crt,
1452 .fb_blank = sm501fb_blank_crt,
1453 .fb_setcolreg = sm501fb_setcolreg,
1454 .fb_pan_display = sm501fb_pan_crt,
1455 .fb_cursor = sm501fb_cursor,
1456 .fb_fillrect = sm501fb_fillrect,
1457 .fb_copyarea = sm501fb_copyarea,
1458 .fb_imageblit = cfb_imageblit,
1459 .fb_sync = sm501fb_sync,
1460 };
1461
1462 static struct fb_ops sm501fb_ops_pnl = {
1463 .owner = THIS_MODULE,
1464 .fb_check_var = sm501fb_check_var_pnl,
1465 .fb_set_par = sm501fb_set_par_pnl,
1466 .fb_pan_display = sm501fb_pan_pnl,
1467 .fb_blank = sm501fb_blank_pnl,
1468 .fb_setcolreg = sm501fb_setcolreg,
1469 .fb_cursor = sm501fb_cursor,
1470 .fb_fillrect = sm501fb_fillrect,
1471 .fb_copyarea = sm501fb_copyarea,
1472 .fb_imageblit = cfb_imageblit,
1473 .fb_sync = sm501fb_sync,
1474 };
1475
1476 /* sm501_init_cursor
1477 *
1478 * initialise hw cursor parameters
1479 */
1480
sm501_init_cursor(struct fb_info * fbi,unsigned int reg_base)1481 static int sm501_init_cursor(struct fb_info *fbi, unsigned int reg_base)
1482 {
1483 struct sm501fb_par *par;
1484 struct sm501fb_info *info;
1485 int ret;
1486
1487 if (fbi == NULL)
1488 return 0;
1489
1490 par = fbi->par;
1491 info = par->info;
1492
1493 par->cursor_regs = info->regs + reg_base;
1494
1495 ret = sm501_alloc_mem(info, &par->cursor, SM501_MEMF_CURSOR, 1024,
1496 fbi->fix.smem_len);
1497 if (ret < 0)
1498 return ret;
1499
1500 /* initialise the colour registers */
1501
1502 smc501_writel(par->cursor.sm_addr,
1503 par->cursor_regs + SM501_OFF_HWC_ADDR);
1504
1505 smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_LOC);
1506 smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_1_2);
1507 smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_3);
1508 sm501fb_sync_regs(info);
1509
1510 return 0;
1511 }
1512
1513 /* sm501fb_info_start
1514 *
1515 * fills the par structure claiming resources and remapping etc.
1516 */
1517
sm501fb_start(struct sm501fb_info * info,struct platform_device * pdev)1518 static int sm501fb_start(struct sm501fb_info *info,
1519 struct platform_device *pdev)
1520 {
1521 struct resource *res;
1522 struct device *dev = &pdev->dev;
1523 int k;
1524 int ret;
1525
1526 info->irq = ret = platform_get_irq(pdev, 0);
1527 if (ret < 0) {
1528 /* we currently do not use the IRQ */
1529 dev_warn(dev, "no irq for device\n");
1530 }
1531
1532 /* allocate, reserve and remap resources for display
1533 * controller registers */
1534 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1535 if (res == NULL) {
1536 dev_err(dev, "no resource definition for registers\n");
1537 ret = -ENOENT;
1538 goto err_release;
1539 }
1540
1541 info->regs_res = request_mem_region(res->start,
1542 resource_size(res),
1543 pdev->name);
1544
1545 if (info->regs_res == NULL) {
1546 dev_err(dev, "cannot claim registers\n");
1547 ret = -ENXIO;
1548 goto err_release;
1549 }
1550
1551 info->regs = ioremap(res->start, resource_size(res));
1552 if (info->regs == NULL) {
1553 dev_err(dev, "cannot remap registers\n");
1554 ret = -ENXIO;
1555 goto err_regs_res;
1556 }
1557
1558 /* allocate, reserve and remap resources for 2d
1559 * controller registers */
1560 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1561 if (res == NULL) {
1562 dev_err(dev, "no resource definition for 2d registers\n");
1563 ret = -ENOENT;
1564 goto err_regs_map;
1565 }
1566
1567 info->regs2d_res = request_mem_region(res->start,
1568 resource_size(res),
1569 pdev->name);
1570
1571 if (info->regs2d_res == NULL) {
1572 dev_err(dev, "cannot claim registers\n");
1573 ret = -ENXIO;
1574 goto err_regs_map;
1575 }
1576
1577 info->regs2d = ioremap(res->start, resource_size(res));
1578 if (info->regs2d == NULL) {
1579 dev_err(dev, "cannot remap registers\n");
1580 ret = -ENXIO;
1581 goto err_regs2d_res;
1582 }
1583
1584 /* allocate, reserve resources for framebuffer */
1585 res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
1586 if (res == NULL) {
1587 dev_err(dev, "no memory resource defined\n");
1588 ret = -ENXIO;
1589 goto err_regs2d_map;
1590 }
1591
1592 info->fbmem_res = request_mem_region(res->start,
1593 resource_size(res),
1594 pdev->name);
1595 if (info->fbmem_res == NULL) {
1596 dev_err(dev, "cannot claim framebuffer\n");
1597 ret = -ENXIO;
1598 goto err_regs2d_map;
1599 }
1600
1601 info->fbmem = ioremap(res->start, resource_size(res));
1602 if (info->fbmem == NULL) {
1603 dev_err(dev, "cannot remap framebuffer\n");
1604 ret = -ENXIO;
1605 goto err_mem_res;
1606 }
1607
1608 info->fbmem_len = resource_size(res);
1609
1610 /* clear framebuffer memory - avoids garbage data on unused fb */
1611 memset_io(info->fbmem, 0, info->fbmem_len);
1612
1613 /* clear palette ram - undefined at power on */
1614 for (k = 0; k < (256 * 3); k++)
1615 smc501_writel(0, info->regs + SM501_DC_PANEL_PALETTE + (k * 4));
1616
1617 /* enable display controller */
1618 sm501_unit_power(dev->parent, SM501_GATE_DISPLAY, 1);
1619
1620 /* enable 2d controller */
1621 sm501_unit_power(dev->parent, SM501_GATE_2D_ENGINE, 1);
1622
1623 /* setup cursors */
1624 sm501_init_cursor(info->fb[HEAD_CRT], SM501_DC_CRT_HWC_ADDR);
1625 sm501_init_cursor(info->fb[HEAD_PANEL], SM501_DC_PANEL_HWC_ADDR);
1626
1627 return 0; /* everything is setup */
1628
1629 err_mem_res:
1630 release_mem_region(info->fbmem_res->start,
1631 resource_size(info->fbmem_res));
1632
1633 err_regs2d_map:
1634 iounmap(info->regs2d);
1635
1636 err_regs2d_res:
1637 release_mem_region(info->regs2d_res->start,
1638 resource_size(info->regs2d_res));
1639
1640 err_regs_map:
1641 iounmap(info->regs);
1642
1643 err_regs_res:
1644 release_mem_region(info->regs_res->start,
1645 resource_size(info->regs_res));
1646
1647 err_release:
1648 return ret;
1649 }
1650
sm501fb_stop(struct sm501fb_info * info)1651 static void sm501fb_stop(struct sm501fb_info *info)
1652 {
1653 /* disable display controller */
1654 sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0);
1655
1656 iounmap(info->fbmem);
1657 release_mem_region(info->fbmem_res->start,
1658 resource_size(info->fbmem_res));
1659
1660 iounmap(info->regs2d);
1661 release_mem_region(info->regs2d_res->start,
1662 resource_size(info->regs2d_res));
1663
1664 iounmap(info->regs);
1665 release_mem_region(info->regs_res->start,
1666 resource_size(info->regs_res));
1667 }
1668
sm501fb_init_fb(struct fb_info * fb,enum sm501_controller head,const char * fbname)1669 static int sm501fb_init_fb(struct fb_info *fb, enum sm501_controller head,
1670 const char *fbname)
1671 {
1672 struct sm501_platdata_fbsub *pd;
1673 struct sm501fb_par *par = fb->par;
1674 struct sm501fb_info *info = par->info;
1675 unsigned long ctrl;
1676 unsigned int enable;
1677 int ret;
1678
1679 switch (head) {
1680 case HEAD_CRT:
1681 pd = info->pdata->fb_crt;
1682 ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
1683 enable = (ctrl & SM501_DC_CRT_CONTROL_ENABLE) ? 1 : 0;
1684
1685 /* ensure we set the correct source register */
1686 if (info->pdata->fb_route != SM501_FB_CRT_PANEL) {
1687 ctrl |= SM501_DC_CRT_CONTROL_SEL;
1688 smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1689 }
1690
1691 break;
1692
1693 case HEAD_PANEL:
1694 pd = info->pdata->fb_pnl;
1695 ctrl = smc501_readl(info->regs + SM501_DC_PANEL_CONTROL);
1696 enable = (ctrl & SM501_DC_PANEL_CONTROL_EN) ? 1 : 0;
1697 break;
1698
1699 default:
1700 pd = NULL; /* stop compiler warnings */
1701 ctrl = 0;
1702 enable = 0;
1703 BUG();
1704 }
1705
1706 dev_info(info->dev, "fb %s %sabled at start\n",
1707 fbname, enable ? "en" : "dis");
1708
1709 /* check to see if our routing allows this */
1710
1711 if (head == HEAD_CRT && info->pdata->fb_route == SM501_FB_CRT_PANEL) {
1712 ctrl &= ~SM501_DC_CRT_CONTROL_SEL;
1713 smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1714 enable = 0;
1715 }
1716
1717 strlcpy(fb->fix.id, fbname, sizeof(fb->fix.id));
1718
1719 memcpy(&par->ops,
1720 (head == HEAD_CRT) ? &sm501fb_ops_crt : &sm501fb_ops_pnl,
1721 sizeof(struct fb_ops));
1722
1723 /* update ops dependent on what we've been passed */
1724
1725 if ((pd->flags & SM501FB_FLAG_USE_HWCURSOR) == 0)
1726 par->ops.fb_cursor = NULL;
1727
1728 fb->fbops = &par->ops;
1729 fb->flags = FBINFO_FLAG_DEFAULT | FBINFO_READS_FAST |
1730 FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
1731 FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN;
1732
1733 #if defined(CONFIG_OF)
1734 #ifdef __BIG_ENDIAN
1735 if (of_get_property(info->dev->parent->of_node, "little-endian", NULL))
1736 fb->flags |= FBINFO_FOREIGN_ENDIAN;
1737 #else
1738 if (of_get_property(info->dev->parent->of_node, "big-endian", NULL))
1739 fb->flags |= FBINFO_FOREIGN_ENDIAN;
1740 #endif
1741 #endif
1742 /* fixed data */
1743
1744 fb->fix.type = FB_TYPE_PACKED_PIXELS;
1745 fb->fix.type_aux = 0;
1746 fb->fix.xpanstep = 1;
1747 fb->fix.ypanstep = 1;
1748 fb->fix.ywrapstep = 0;
1749 fb->fix.accel = FB_ACCEL_NONE;
1750
1751 /* screenmode */
1752
1753 fb->var.nonstd = 0;
1754 fb->var.activate = FB_ACTIVATE_NOW;
1755 fb->var.accel_flags = 0;
1756 fb->var.vmode = FB_VMODE_NONINTERLACED;
1757 fb->var.bits_per_pixel = 16;
1758
1759 if (info->edid_data) {
1760 /* Now build modedb from EDID */
1761 fb_edid_to_monspecs(info->edid_data, &fb->monspecs);
1762 fb_videomode_to_modelist(fb->monspecs.modedb,
1763 fb->monspecs.modedb_len,
1764 &fb->modelist);
1765 }
1766
1767 if (enable && (pd->flags & SM501FB_FLAG_USE_INIT_MODE) && 0) {
1768 /* TODO read the mode from the current display */
1769 } else {
1770 if (pd->def_mode) {
1771 dev_info(info->dev, "using supplied mode\n");
1772 fb_videomode_to_var(&fb->var, pd->def_mode);
1773
1774 fb->var.bits_per_pixel = pd->def_bpp ? pd->def_bpp : 8;
1775 fb->var.xres_virtual = fb->var.xres;
1776 fb->var.yres_virtual = fb->var.yres;
1777 } else {
1778 if (info->edid_data) {
1779 ret = fb_find_mode(&fb->var, fb, fb_mode,
1780 fb->monspecs.modedb,
1781 fb->monspecs.modedb_len,
1782 &sm501_default_mode, default_bpp);
1783 /* edid_data is no longer needed, free it */
1784 kfree(info->edid_data);
1785 } else {
1786 ret = fb_find_mode(&fb->var, fb,
1787 NULL, NULL, 0, NULL, 8);
1788 }
1789
1790 switch (ret) {
1791 case 1:
1792 dev_info(info->dev, "using mode specified in "
1793 "@mode\n");
1794 break;
1795 case 2:
1796 dev_info(info->dev, "using mode specified in "
1797 "@mode with ignored refresh rate\n");
1798 break;
1799 case 3:
1800 dev_info(info->dev, "using mode default "
1801 "mode\n");
1802 break;
1803 case 4:
1804 dev_info(info->dev, "using mode from list\n");
1805 break;
1806 default:
1807 dev_info(info->dev, "ret = %d\n", ret);
1808 dev_info(info->dev, "failed to find mode\n");
1809 return -EINVAL;
1810 }
1811 }
1812 }
1813
1814 /* initialise and set the palette */
1815 if (fb_alloc_cmap(&fb->cmap, NR_PALETTE, 0)) {
1816 dev_err(info->dev, "failed to allocate cmap memory\n");
1817 return -ENOMEM;
1818 }
1819 fb_set_cmap(&fb->cmap, fb);
1820
1821 ret = (fb->fbops->fb_check_var)(&fb->var, fb);
1822 if (ret)
1823 dev_err(info->dev, "check_var() failed on initial setup?\n");
1824
1825 return 0;
1826 }
1827
1828 /* default platform data if none is supplied (ie, PCI device) */
1829
1830 static struct sm501_platdata_fbsub sm501fb_pdata_crt = {
1831 .flags = (SM501FB_FLAG_USE_INIT_MODE |
1832 SM501FB_FLAG_USE_HWCURSOR |
1833 SM501FB_FLAG_USE_HWACCEL |
1834 SM501FB_FLAG_DISABLE_AT_EXIT),
1835
1836 };
1837
1838 static struct sm501_platdata_fbsub sm501fb_pdata_pnl = {
1839 .flags = (SM501FB_FLAG_USE_INIT_MODE |
1840 SM501FB_FLAG_USE_HWCURSOR |
1841 SM501FB_FLAG_USE_HWACCEL |
1842 SM501FB_FLAG_DISABLE_AT_EXIT),
1843 };
1844
1845 static struct sm501_platdata_fb sm501fb_def_pdata = {
1846 .fb_route = SM501_FB_OWN,
1847 .fb_crt = &sm501fb_pdata_crt,
1848 .fb_pnl = &sm501fb_pdata_pnl,
1849 };
1850
1851 static char driver_name_crt[] = "sm501fb-crt";
1852 static char driver_name_pnl[] = "sm501fb-panel";
1853
sm501fb_probe_one(struct sm501fb_info * info,enum sm501_controller head)1854 static int sm501fb_probe_one(struct sm501fb_info *info,
1855 enum sm501_controller head)
1856 {
1857 unsigned char *name = (head == HEAD_CRT) ? "crt" : "panel";
1858 struct sm501_platdata_fbsub *pd;
1859 struct sm501fb_par *par;
1860 struct fb_info *fbi;
1861
1862 pd = (head == HEAD_CRT) ? info->pdata->fb_crt : info->pdata->fb_pnl;
1863
1864 /* Do not initialise if we've not been given any platform data */
1865 if (pd == NULL) {
1866 dev_info(info->dev, "no data for fb %s (disabled)\n", name);
1867 return 0;
1868 }
1869
1870 fbi = framebuffer_alloc(sizeof(struct sm501fb_par), info->dev);
1871 if (fbi == NULL) {
1872 dev_err(info->dev, "cannot allocate %s framebuffer\n", name);
1873 return -ENOMEM;
1874 }
1875
1876 par = fbi->par;
1877 par->info = info;
1878 par->head = head;
1879 fbi->pseudo_palette = &par->pseudo_palette;
1880
1881 info->fb[head] = fbi;
1882
1883 return 0;
1884 }
1885
1886 /* Free up anything allocated by sm501fb_init_fb */
1887
sm501_free_init_fb(struct sm501fb_info * info,enum sm501_controller head)1888 static void sm501_free_init_fb(struct sm501fb_info *info,
1889 enum sm501_controller head)
1890 {
1891 struct fb_info *fbi = info->fb[head];
1892
1893 if (!fbi)
1894 return;
1895
1896 fb_dealloc_cmap(&fbi->cmap);
1897 }
1898
sm501fb_start_one(struct sm501fb_info * info,enum sm501_controller head,const char * drvname)1899 static int sm501fb_start_one(struct sm501fb_info *info,
1900 enum sm501_controller head, const char *drvname)
1901 {
1902 struct fb_info *fbi = info->fb[head];
1903 int ret;
1904
1905 if (!fbi)
1906 return 0;
1907
1908 mutex_init(&info->fb[head]->mm_lock);
1909
1910 ret = sm501fb_init_fb(info->fb[head], head, drvname);
1911 if (ret) {
1912 dev_err(info->dev, "cannot initialise fb %s\n", drvname);
1913 return ret;
1914 }
1915
1916 ret = register_framebuffer(info->fb[head]);
1917 if (ret) {
1918 dev_err(info->dev, "failed to register fb %s\n", drvname);
1919 sm501_free_init_fb(info, head);
1920 return ret;
1921 }
1922
1923 dev_info(info->dev, "fb%d: %s frame buffer\n", fbi->node, fbi->fix.id);
1924
1925 return 0;
1926 }
1927
sm501fb_probe(struct platform_device * pdev)1928 static int sm501fb_probe(struct platform_device *pdev)
1929 {
1930 struct sm501fb_info *info;
1931 struct device *dev = &pdev->dev;
1932 int ret;
1933
1934 /* allocate our framebuffers */
1935 info = kzalloc(sizeof(*info), GFP_KERNEL);
1936 if (!info) {
1937 dev_err(dev, "failed to allocate state\n");
1938 return -ENOMEM;
1939 }
1940
1941 info->dev = dev = &pdev->dev;
1942 platform_set_drvdata(pdev, info);
1943
1944 if (dev->parent->platform_data) {
1945 struct sm501_platdata *pd = dev->parent->platform_data;
1946 info->pdata = pd->fb;
1947 }
1948
1949 if (info->pdata == NULL) {
1950 int found = 0;
1951 #if defined(CONFIG_OF)
1952 struct device_node *np = pdev->dev.parent->of_node;
1953 const u8 *prop;
1954 const char *cp;
1955 int len;
1956
1957 info->pdata = &sm501fb_def_pdata;
1958 if (np) {
1959 /* Get EDID */
1960 cp = of_get_property(np, "mode", &len);
1961 if (cp)
1962 strcpy(fb_mode, cp);
1963 prop = of_get_property(np, "edid", &len);
1964 if (prop && len == EDID_LENGTH) {
1965 info->edid_data = kmemdup(prop, EDID_LENGTH,
1966 GFP_KERNEL);
1967 if (info->edid_data)
1968 found = 1;
1969 }
1970 }
1971 #endif
1972 if (!found) {
1973 dev_info(dev, "using default configuration data\n");
1974 info->pdata = &sm501fb_def_pdata;
1975 }
1976 }
1977
1978 /* probe for the presence of each panel */
1979
1980 ret = sm501fb_probe_one(info, HEAD_CRT);
1981 if (ret < 0) {
1982 dev_err(dev, "failed to probe CRT\n");
1983 goto err_alloc;
1984 }
1985
1986 ret = sm501fb_probe_one(info, HEAD_PANEL);
1987 if (ret < 0) {
1988 dev_err(dev, "failed to probe PANEL\n");
1989 goto err_probed_crt;
1990 }
1991
1992 if (info->fb[HEAD_PANEL] == NULL &&
1993 info->fb[HEAD_CRT] == NULL) {
1994 dev_err(dev, "no framebuffers found\n");
1995 ret = -ENODEV;
1996 goto err_alloc;
1997 }
1998
1999 /* get the resources for both of the framebuffers */
2000
2001 ret = sm501fb_start(info, pdev);
2002 if (ret) {
2003 dev_err(dev, "cannot initialise SM501\n");
2004 goto err_probed_panel;
2005 }
2006
2007 ret = sm501fb_start_one(info, HEAD_CRT, driver_name_crt);
2008 if (ret) {
2009 dev_err(dev, "failed to start CRT\n");
2010 goto err_started;
2011 }
2012
2013 ret = sm501fb_start_one(info, HEAD_PANEL, driver_name_pnl);
2014 if (ret) {
2015 dev_err(dev, "failed to start Panel\n");
2016 goto err_started_crt;
2017 }
2018
2019 /* create device files */
2020
2021 ret = device_create_file(dev, &dev_attr_crt_src);
2022 if (ret)
2023 goto err_started_panel;
2024
2025 ret = device_create_file(dev, &dev_attr_fbregs_pnl);
2026 if (ret)
2027 goto err_attached_crtsrc_file;
2028
2029 ret = device_create_file(dev, &dev_attr_fbregs_crt);
2030 if (ret)
2031 goto err_attached_pnlregs_file;
2032
2033 /* we registered, return ok */
2034 return 0;
2035
2036 err_attached_pnlregs_file:
2037 device_remove_file(dev, &dev_attr_fbregs_pnl);
2038
2039 err_attached_crtsrc_file:
2040 device_remove_file(dev, &dev_attr_crt_src);
2041
2042 err_started_panel:
2043 unregister_framebuffer(info->fb[HEAD_PANEL]);
2044 sm501_free_init_fb(info, HEAD_PANEL);
2045
2046 err_started_crt:
2047 unregister_framebuffer(info->fb[HEAD_CRT]);
2048 sm501_free_init_fb(info, HEAD_CRT);
2049
2050 err_started:
2051 sm501fb_stop(info);
2052
2053 err_probed_panel:
2054 framebuffer_release(info->fb[HEAD_PANEL]);
2055
2056 err_probed_crt:
2057 framebuffer_release(info->fb[HEAD_CRT]);
2058
2059 err_alloc:
2060 kfree(info);
2061
2062 return ret;
2063 }
2064
2065
2066 /*
2067 * Cleanup
2068 */
sm501fb_remove(struct platform_device * pdev)2069 static int sm501fb_remove(struct platform_device *pdev)
2070 {
2071 struct sm501fb_info *info = platform_get_drvdata(pdev);
2072 struct fb_info *fbinfo_crt = info->fb[0];
2073 struct fb_info *fbinfo_pnl = info->fb[1];
2074
2075 device_remove_file(&pdev->dev, &dev_attr_fbregs_crt);
2076 device_remove_file(&pdev->dev, &dev_attr_fbregs_pnl);
2077 device_remove_file(&pdev->dev, &dev_attr_crt_src);
2078
2079 sm501_free_init_fb(info, HEAD_CRT);
2080 sm501_free_init_fb(info, HEAD_PANEL);
2081
2082 if (fbinfo_crt)
2083 unregister_framebuffer(fbinfo_crt);
2084 if (fbinfo_pnl)
2085 unregister_framebuffer(fbinfo_pnl);
2086
2087 sm501fb_stop(info);
2088 kfree(info);
2089
2090 framebuffer_release(fbinfo_pnl);
2091 framebuffer_release(fbinfo_crt);
2092
2093 return 0;
2094 }
2095
2096 #ifdef CONFIG_PM
2097
sm501fb_suspend_fb(struct sm501fb_info * info,enum sm501_controller head)2098 static int sm501fb_suspend_fb(struct sm501fb_info *info,
2099 enum sm501_controller head)
2100 {
2101 struct fb_info *fbi = info->fb[head];
2102 struct sm501fb_par *par;
2103
2104 if (!fbi)
2105 return 0;
2106
2107 par = fbi->par;
2108 if (par->screen.size == 0)
2109 return 0;
2110
2111 /* blank the relevant interface to ensure unit power minimised */
2112 (par->ops.fb_blank)(FB_BLANK_POWERDOWN, fbi);
2113
2114 /* tell console/fb driver we are suspending */
2115
2116 console_lock();
2117 fb_set_suspend(fbi, 1);
2118 console_unlock();
2119
2120 /* backup copies in case chip is powered down over suspend */
2121
2122 par->store_fb = vmalloc(par->screen.size);
2123 if (par->store_fb == NULL) {
2124 dev_err(info->dev, "no memory to store screen\n");
2125 return -ENOMEM;
2126 }
2127
2128 par->store_cursor = vmalloc(par->cursor.size);
2129 if (par->store_cursor == NULL) {
2130 dev_err(info->dev, "no memory to store cursor\n");
2131 goto err_nocursor;
2132 }
2133
2134 dev_dbg(info->dev, "suspending screen to %p\n", par->store_fb);
2135 dev_dbg(info->dev, "suspending cursor to %p\n", par->store_cursor);
2136
2137 memcpy_fromio(par->store_fb, par->screen.k_addr, par->screen.size);
2138 memcpy_fromio(par->store_cursor, par->cursor.k_addr, par->cursor.size);
2139
2140 return 0;
2141
2142 err_nocursor:
2143 vfree(par->store_fb);
2144 par->store_fb = NULL;
2145
2146 return -ENOMEM;
2147 }
2148
sm501fb_resume_fb(struct sm501fb_info * info,enum sm501_controller head)2149 static void sm501fb_resume_fb(struct sm501fb_info *info,
2150 enum sm501_controller head)
2151 {
2152 struct fb_info *fbi = info->fb[head];
2153 struct sm501fb_par *par;
2154
2155 if (!fbi)
2156 return;
2157
2158 par = fbi->par;
2159 if (par->screen.size == 0)
2160 return;
2161
2162 /* re-activate the configuration */
2163
2164 (par->ops.fb_set_par)(fbi);
2165
2166 /* restore the data */
2167
2168 dev_dbg(info->dev, "restoring screen from %p\n", par->store_fb);
2169 dev_dbg(info->dev, "restoring cursor from %p\n", par->store_cursor);
2170
2171 if (par->store_fb)
2172 memcpy_toio(par->screen.k_addr, par->store_fb,
2173 par->screen.size);
2174
2175 if (par->store_cursor)
2176 memcpy_toio(par->cursor.k_addr, par->store_cursor,
2177 par->cursor.size);
2178
2179 console_lock();
2180 fb_set_suspend(fbi, 0);
2181 console_unlock();
2182
2183 vfree(par->store_fb);
2184 vfree(par->store_cursor);
2185 }
2186
2187
2188 /* suspend and resume support */
2189
sm501fb_suspend(struct platform_device * pdev,pm_message_t state)2190 static int sm501fb_suspend(struct platform_device *pdev, pm_message_t state)
2191 {
2192 struct sm501fb_info *info = platform_get_drvdata(pdev);
2193
2194 /* store crt control to resume with */
2195 info->pm_crt_ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
2196
2197 sm501fb_suspend_fb(info, HEAD_CRT);
2198 sm501fb_suspend_fb(info, HEAD_PANEL);
2199
2200 /* turn off the clocks, in case the device is not powered down */
2201 sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0);
2202
2203 return 0;
2204 }
2205
2206 #define SM501_CRT_CTRL_SAVE (SM501_DC_CRT_CONTROL_TVP | \
2207 SM501_DC_CRT_CONTROL_SEL)
2208
2209
sm501fb_resume(struct platform_device * pdev)2210 static int sm501fb_resume(struct platform_device *pdev)
2211 {
2212 struct sm501fb_info *info = platform_get_drvdata(pdev);
2213 unsigned long crt_ctrl;
2214
2215 sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 1);
2216
2217 /* restore the items we want to be saved for crt control */
2218
2219 crt_ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
2220 crt_ctrl &= ~SM501_CRT_CTRL_SAVE;
2221 crt_ctrl |= info->pm_crt_ctrl & SM501_CRT_CTRL_SAVE;
2222 smc501_writel(crt_ctrl, info->regs + SM501_DC_CRT_CONTROL);
2223
2224 sm501fb_resume_fb(info, HEAD_CRT);
2225 sm501fb_resume_fb(info, HEAD_PANEL);
2226
2227 return 0;
2228 }
2229
2230 #else
2231 #define sm501fb_suspend NULL
2232 #define sm501fb_resume NULL
2233 #endif
2234
2235 static struct platform_driver sm501fb_driver = {
2236 .probe = sm501fb_probe,
2237 .remove = sm501fb_remove,
2238 .suspend = sm501fb_suspend,
2239 .resume = sm501fb_resume,
2240 .driver = {
2241 .name = "sm501-fb",
2242 },
2243 };
2244
2245 module_platform_driver(sm501fb_driver);
2246
2247 module_param_named(mode, fb_mode, charp, 0);
2248 MODULE_PARM_DESC(mode,
2249 "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
2250 module_param_named(bpp, default_bpp, ulong, 0);
2251 MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified mode");
2252 MODULE_AUTHOR("Ben Dooks, Vincent Sanders");
2253 MODULE_DESCRIPTION("SM501 Framebuffer driver");
2254 MODULE_LICENSE("GPL v2");
2255
