Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
[linux-2.6] / drivers / video / sm501fb.c
1 /* linux/drivers/video/sm501fb.c
2  *
3  * Copyright (c) 2006 Simtec Electronics
4  *      Vincent Sanders <vince@simtec.co.uk>
5  *      Ben Dooks <ben@simtec.co.uk>
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 as
9  * published by the Free Software Foundation.
10  *
11  * Framebuffer driver for the Silicon Motion SM501
12  */
13
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/errno.h>
17 #include <linux/string.h>
18 #include <linux/mm.h>
19 #include <linux/tty.h>
20 #include <linux/slab.h>
21 #include <linux/delay.h>
22 #include <linux/fb.h>
23 #include <linux/init.h>
24 #include <linux/vmalloc.h>
25 #include <linux/dma-mapping.h>
26 #include <linux/interrupt.h>
27 #include <linux/workqueue.h>
28 #include <linux/wait.h>
29 #include <linux/platform_device.h>
30 #include <linux/clk.h>
31 #include <linux/console.h>
32
33 #include <asm/io.h>
34 #include <asm/uaccess.h>
35 #include <asm/div64.h>
36
37 #ifdef CONFIG_PM
38 #include <linux/pm.h>
39 #endif
40
41 #include <linux/sm501.h>
42 #include <linux/sm501-regs.h>
43
44 #define NR_PALETTE      256
45
46 enum sm501_controller {
47         HEAD_CRT        = 0,
48         HEAD_PANEL      = 1,
49 };
50
51 /* SM501 memory 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 sm501_platdata_fb *pdata;        /* our platform data */
70
71         unsigned long            pm_crt_ctrl;   /* pm: crt ctrl save */
72
73         int                      irq;
74         int                      swap_endian;   /* set to swap rgb=>bgr */
75         void __iomem            *regs;          /* remapped registers */
76         void __iomem            *fbmem;         /* remapped framebuffer */
77         size_t                   fbmem_len;     /* length of remapped region */
78 };
79
80 /* per-framebuffer private data */
81 struct sm501fb_par {
82         u32                      pseudo_palette[16];
83
84         enum sm501_controller    head;
85         struct sm501_mem         cursor;
86         struct sm501_mem         screen;
87         struct fb_ops            ops;
88
89         void                    *store_fb;
90         void                    *store_cursor;
91         void __iomem            *cursor_regs;
92         struct sm501fb_info     *info;
93 };
94
95 /* Helper functions */
96
97 static inline int h_total(struct fb_var_screeninfo *var)
98 {
99         return var->xres + var->left_margin +
100                 var->right_margin + var->hsync_len;
101 }
102
103 static inline int v_total(struct fb_var_screeninfo *var)
104 {
105         return var->yres + var->upper_margin +
106                 var->lower_margin + var->vsync_len;
107 }
108
109 /* sm501fb_sync_regs()
110  *
111  * This call is mainly for PCI bus systems where we need to
112  * ensure that any writes to the bus are completed before the
113  * next phase, or after completing a function.
114 */
115
116 static inline void sm501fb_sync_regs(struct sm501fb_info *info)
117 {
118         readl(info->regs);
119 }
120
121 /* sm501_alloc_mem
122  *
123  * This is an attempt to lay out memory for the two framebuffers and
124  * everything else
125  *
126  * |fbmem_res->start                                           fbmem_res->end|
127  * |                                                                         |
128  * |fb[0].fix.smem_start    |         |fb[1].fix.smem_start    |     2K      |
129  * |-> fb[0].fix.smem_len <-| spare   |-> fb[1].fix.smem_len <-|-> cursors <-|
130  *
131  * The "spare" space is for the 2d engine data
132  * the fixed is space for the cursors (2x1Kbyte)
133  *
134  * we need to allocate memory for the 2D acceleration engine
135  * command list and the data for the engine to deal with.
136  *
137  * - all allocations must be 128bit aligned
138  * - cursors are 64x64x2 bits (1Kbyte)
139  *
140  */
141
142 #define SM501_MEMF_CURSOR               (1)
143 #define SM501_MEMF_PANEL                (2)
144 #define SM501_MEMF_CRT                  (4)
145 #define SM501_MEMF_ACCEL                (8)
146
147 static int sm501_alloc_mem(struct sm501fb_info *inf, struct sm501_mem *mem,
148                            unsigned int why, size_t size)
149 {
150         struct sm501fb_par *par;
151         struct fb_info *fbi;
152         unsigned int ptr;
153         unsigned int end;
154
155         switch (why) {
156         case SM501_MEMF_CURSOR:
157                 ptr = inf->fbmem_len - size;
158                 inf->fbmem_len = ptr;   /* adjust available memory. */
159                 break;
160
161         case SM501_MEMF_PANEL:
162                 if (size > inf->fbmem_len)
163                         return -ENOMEM;
164
165                 ptr = inf->fbmem_len - size;
166                 fbi = inf->fb[HEAD_CRT];
167
168                 /* round down, some programs such as directfb do not draw
169                  * 0,0 correctly unless the start is aligned to a page start.
170                  */
171
172                 if (ptr > 0)
173                         ptr &= ~(PAGE_SIZE - 1);
174
175                 if (fbi && ptr < fbi->fix.smem_len)
176                         return -ENOMEM;
177
178                 break;
179
180         case SM501_MEMF_CRT:
181                 ptr = 0;
182
183                 /* check to see if we have panel memory allocated
184                  * which would put an limit on available memory. */
185
186                 fbi = inf->fb[HEAD_PANEL];
187                 if (fbi) {
188                         par = fbi->par;
189                         end = par->screen.k_addr ? par->screen.sm_addr : inf->fbmem_len;
190                 } else
191                         end = inf->fbmem_len;
192
193                 if ((ptr + size) > end)
194                         return -ENOMEM;
195
196                 break;
197
198         case SM501_MEMF_ACCEL:
199                 fbi = inf->fb[HEAD_CRT];
200                 ptr = fbi ? fbi->fix.smem_len : 0;
201
202                 fbi = inf->fb[HEAD_PANEL];
203                 if (fbi) {
204                         par = fbi->par;
205                         end = par->screen.sm_addr;
206                 } else
207                         end = inf->fbmem_len;
208
209                 if ((ptr + size) > end)
210                         return -ENOMEM;
211
212                 break;
213
214         default:
215                 return -EINVAL;
216         }
217
218         mem->size    = size;
219         mem->sm_addr = ptr;
220         mem->k_addr  = inf->fbmem + ptr;
221
222         dev_dbg(inf->dev, "%s: result %08lx, %p - %u, %zd\n",
223                 __func__, mem->sm_addr, mem->k_addr, why, size);
224
225         return 0;
226 }
227
228 /* sm501fb_ps_to_hz
229  *
230  * Converts a period in picoseconds to Hz.
231  *
232  * Note, we try to keep this in Hz to minimise rounding with
233  * the limited PLL settings on the SM501.
234 */
235
236 static unsigned long sm501fb_ps_to_hz(unsigned long psvalue)
237 {
238         unsigned long long numerator=1000000000000ULL;
239
240         /* 10^12 / picosecond period gives frequency in Hz */
241         do_div(numerator, psvalue);
242         return (unsigned long)numerator;
243 }
244
245 /* sm501fb_hz_to_ps is identical to the oposite transform */
246
247 #define sm501fb_hz_to_ps(x) sm501fb_ps_to_hz(x)
248
249 /* sm501fb_setup_gamma
250  *
251  * Programs a linear 1.0 gamma ramp in case the gamma
252  * correction is enabled without programming anything else.
253 */
254
255 static void sm501fb_setup_gamma(struct sm501fb_info *fbi,
256                                 unsigned long palette)
257 {
258         unsigned long value = 0;
259         int offset;
260
261         /* set gamma values */
262         for (offset = 0; offset < 256 * 4; offset += 4) {
263                 writel(value, fbi->regs + palette + offset);
264                 value += 0x010101;      /* Advance RGB by 1,1,1.*/
265         }
266 }
267
268 /* sm501fb_check_var
269  *
270  * check common variables for both panel and crt
271 */
272
273 static int sm501fb_check_var(struct fb_var_screeninfo *var,
274                              struct fb_info *info)
275 {
276         struct sm501fb_par  *par = info->par;
277         struct sm501fb_info *sm  = par->info;
278         unsigned long tmp;
279
280         /* check we can fit these values into the registers */
281
282         if (var->hsync_len > 255 || var->vsync_len > 63)
283                 return -EINVAL;
284
285         /* hdisplay end and hsync start */
286         if ((var->xres + var->right_margin) > 4096)
287                 return -EINVAL;
288
289         /* vdisplay end and vsync start */
290         if ((var->yres + var->lower_margin) > 2048)
291                 return -EINVAL;
292
293         /* hard limits of device */
294
295         if (h_total(var) > 4096 || v_total(var) > 2048)
296                 return -EINVAL;
297
298         /* check our line length is going to be 128 bit aligned */
299
300         tmp = (var->xres * var->bits_per_pixel) / 8;
301         if ((tmp & 15) != 0)
302                 return -EINVAL;
303
304         /* check the virtual size */
305
306         if (var->xres_virtual > 4096 || var->yres_virtual > 2048)
307                 return -EINVAL;
308
309         /* can cope with 8,16 or 32bpp */
310
311         if (var->bits_per_pixel <= 8)
312                 var->bits_per_pixel = 8;
313         else if (var->bits_per_pixel <= 16)
314                 var->bits_per_pixel = 16;
315         else if (var->bits_per_pixel == 24)
316                 var->bits_per_pixel = 32;
317
318         /* set r/g/b positions and validate bpp */
319         switch(var->bits_per_pixel) {
320         case 8:
321                 var->red.length         = var->bits_per_pixel;
322                 var->red.offset         = 0;
323                 var->green.length       = var->bits_per_pixel;
324                 var->green.offset       = 0;
325                 var->blue.length        = var->bits_per_pixel;
326                 var->blue.offset        = 0;
327                 var->transp.length      = 0;
328                 var->transp.offset      = 0;
329
330                 break;
331
332         case 16:
333                 if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) {
334                         var->blue.offset        = 11;
335                         var->green.offset       = 5;
336                         var->red.offset         = 0;
337                 } else {
338                         var->red.offset         = 11;
339                         var->green.offset       = 5;
340                         var->blue.offset        = 0;
341                 }
342                 var->transp.offset      = 0;
343
344                 var->red.length         = 5;
345                 var->green.length       = 6;
346                 var->blue.length        = 5;
347                 var->transp.length      = 0;
348                 break;
349
350         case 32:
351                 if (sm->pdata->flags & SM501_FBPD_SWAP_FB_ENDIAN) {
352                         var->transp.offset      = 0;
353                         var->red.offset         = 8;
354                         var->green.offset       = 16;
355                         var->blue.offset        = 24;
356                 } else {
357                         var->transp.offset      = 24;
358                         var->red.offset         = 16;
359                         var->green.offset       = 8;
360                         var->blue.offset        = 0;
361                 }
362
363                 var->red.length         = 8;
364                 var->green.length       = 8;
365                 var->blue.length        = 8;
366                 var->transp.length      = 0;
367                 break;
368
369         default:
370                 return -EINVAL;
371         }
372
373         return 0;
374 }
375
376 /*
377  * sm501fb_check_var_crt():
378  *
379  * check the parameters for the CRT head, and either bring them
380  * back into range, or return -EINVAL.
381 */
382
383 static int sm501fb_check_var_crt(struct fb_var_screeninfo *var,
384                                  struct fb_info *info)
385 {
386         return sm501fb_check_var(var, info);
387 }
388
389 /* sm501fb_check_var_pnl():
390  *
391  * check the parameters for the CRT head, and either bring them
392  * back into range, or return -EINVAL.
393 */
394
395 static int sm501fb_check_var_pnl(struct fb_var_screeninfo *var,
396                                  struct fb_info *info)
397 {
398         return sm501fb_check_var(var, info);
399 }
400
401 /* sm501fb_set_par_common
402  *
403  * set common registers for framebuffers
404 */
405
406 static int sm501fb_set_par_common(struct fb_info *info,
407                                   struct fb_var_screeninfo *var)
408 {
409         struct sm501fb_par  *par = info->par;
410         struct sm501fb_info *fbi = par->info;
411         unsigned long pixclock;      /* pixelclock in Hz */
412         unsigned long sm501pixclock; /* pixelclock the 501 can achive in Hz */
413         unsigned int mem_type;
414         unsigned int clock_type;
415         unsigned int head_addr;
416
417         dev_dbg(fbi->dev, "%s: %dx%d, bpp = %d, virtual %dx%d\n",
418                 __func__, var->xres, var->yres, var->bits_per_pixel,
419                 var->xres_virtual, var->yres_virtual);
420
421         switch (par->head) {
422         case HEAD_CRT:
423                 mem_type = SM501_MEMF_CRT;
424                 clock_type = SM501_CLOCK_V2XCLK;
425                 head_addr = SM501_DC_CRT_FB_ADDR;
426                 break;
427
428         case HEAD_PANEL:
429                 mem_type = SM501_MEMF_PANEL;
430                 clock_type = SM501_CLOCK_P2XCLK;
431                 head_addr = SM501_DC_PANEL_FB_ADDR;
432                 break;
433
434         default:
435                 mem_type = 0;           /* stop compiler warnings */
436                 head_addr = 0;
437                 clock_type = 0;
438         }
439
440         switch (var->bits_per_pixel) {
441         case 8:
442                 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
443                 break;
444
445         case 16:
446                 info->fix.visual = FB_VISUAL_TRUECOLOR;
447                 break;
448
449         case 32:
450                 info->fix.visual = FB_VISUAL_TRUECOLOR;
451                 break;
452         }
453
454         /* allocate fb memory within 501 */
455         info->fix.line_length = (var->xres_virtual * var->bits_per_pixel)/8;
456         info->fix.smem_len    = info->fix.line_length * var->yres_virtual;
457
458         dev_dbg(fbi->dev, "%s: line length = %u\n", __func__,
459                 info->fix.line_length);
460
461         if (sm501_alloc_mem(fbi, &par->screen, mem_type,
462                             info->fix.smem_len)) {
463                 dev_err(fbi->dev, "no memory available\n");
464                 return -ENOMEM;
465         }
466
467         info->fix.smem_start = fbi->fbmem_res->start + par->screen.sm_addr;
468
469         info->screen_base = fbi->fbmem + par->screen.sm_addr;
470         info->screen_size = info->fix.smem_len;
471
472         /* set start of framebuffer to the screen */
473
474         writel(par->screen.sm_addr | SM501_ADDR_FLIP, fbi->regs + head_addr);
475
476         /* program CRT clock  */
477
478         pixclock = sm501fb_ps_to_hz(var->pixclock);
479
480         sm501pixclock = sm501_set_clock(fbi->dev->parent, clock_type,
481                                         pixclock);
482
483         /* update fb layer with actual clock used */
484         var->pixclock = sm501fb_hz_to_ps(sm501pixclock);
485
486         dev_dbg(fbi->dev, "%s: pixclock(ps) = %u, pixclock(Hz)  = %lu, "
487                "sm501pixclock = %lu,  error = %ld%%\n",
488                __func__, var->pixclock, pixclock, sm501pixclock,
489                ((pixclock - sm501pixclock)*100)/pixclock);
490
491         return 0;
492 }
493
494 /* sm501fb_set_par_geometry
495  *
496  * set the geometry registers for specified framebuffer.
497 */
498
499 static void sm501fb_set_par_geometry(struct fb_info *info,
500                                      struct fb_var_screeninfo *var)
501 {
502         struct sm501fb_par  *par = info->par;
503         struct sm501fb_info *fbi = par->info;
504         void __iomem *base = fbi->regs;
505         unsigned long reg;
506
507         if (par->head == HEAD_CRT)
508                 base += SM501_DC_CRT_H_TOT;
509         else
510                 base += SM501_DC_PANEL_H_TOT;
511
512         /* set framebuffer width and display width */
513
514         reg = info->fix.line_length;
515         reg |= ((var->xres * var->bits_per_pixel)/8) << 16;
516
517         writel(reg, fbi->regs + (par->head == HEAD_CRT ?
518                     SM501_DC_CRT_FB_OFFSET :  SM501_DC_PANEL_FB_OFFSET));
519
520         /* program horizontal total */
521
522         reg  = (h_total(var) - 1) << 16;
523         reg |= (var->xres - 1);
524
525         writel(reg, base + SM501_OFF_DC_H_TOT);
526
527         /* program horizontal sync */
528
529         reg  = var->hsync_len << 16;
530         reg |= var->xres + var->right_margin - 1;
531
532         writel(reg, base + SM501_OFF_DC_H_SYNC);
533
534         /* program vertical total */
535
536         reg  = (v_total(var) - 1) << 16;
537         reg |= (var->yres - 1);
538
539         writel(reg, base + SM501_OFF_DC_V_TOT);
540
541         /* program vertical sync */
542         reg  = var->vsync_len << 16;
543         reg |= var->yres + var->lower_margin - 1;
544
545         writel(reg, base + SM501_OFF_DC_V_SYNC);
546 }
547
548 /* sm501fb_pan_crt
549  *
550  * pan the CRT display output within an virtual framebuffer
551 */
552
553 static int sm501fb_pan_crt(struct fb_var_screeninfo *var,
554                            struct fb_info *info)
555 {
556         struct sm501fb_par  *par = info->par;
557         struct sm501fb_info *fbi = par->info;
558         unsigned int bytes_pixel = var->bits_per_pixel / 8;
559         unsigned long reg;
560         unsigned long xoffs;
561
562         xoffs = var->xoffset * bytes_pixel;
563
564         reg = readl(fbi->regs + SM501_DC_CRT_CONTROL);
565
566         reg &= ~SM501_DC_CRT_CONTROL_PIXEL_MASK;
567         reg |= ((xoffs & 15) / bytes_pixel) << 4;
568         writel(reg, fbi->regs + SM501_DC_CRT_CONTROL);
569
570         reg = (par->screen.sm_addr + xoffs +
571                var->yoffset * info->fix.line_length);
572         writel(reg | SM501_ADDR_FLIP, fbi->regs + SM501_DC_CRT_FB_ADDR);
573
574         sm501fb_sync_regs(fbi);
575         return 0;
576 }
577
578 /* sm501fb_pan_pnl
579  *
580  * pan the panel display output within an virtual framebuffer
581 */
582
583 static int sm501fb_pan_pnl(struct fb_var_screeninfo *var,
584                            struct fb_info *info)
585 {
586         struct sm501fb_par  *par = info->par;
587         struct sm501fb_info *fbi = par->info;
588         unsigned long reg;
589
590         reg = var->xoffset | (var->xres_virtual << 16);
591         writel(reg, fbi->regs + SM501_DC_PANEL_FB_WIDTH);
592
593         reg = var->yoffset | (var->yres_virtual << 16);
594         writel(reg, fbi->regs + SM501_DC_PANEL_FB_HEIGHT);
595
596         sm501fb_sync_regs(fbi);
597         return 0;
598 }
599
600 /* sm501fb_set_par_crt
601  *
602  * Set the CRT video mode from the fb_info structure
603 */
604
605 static int sm501fb_set_par_crt(struct fb_info *info)
606 {
607         struct sm501fb_par  *par = info->par;
608         struct sm501fb_info *fbi = par->info;
609         struct fb_var_screeninfo *var = &info->var;
610         unsigned long control;       /* control register */
611         int ret;
612
613         /* activate new configuration */
614
615         dev_dbg(fbi->dev, "%s(%p)\n", __func__, info);
616
617         /* enable CRT DAC - note 0 is on!*/
618         sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER);
619
620         control = readl(fbi->regs + SM501_DC_CRT_CONTROL);
621
622         control &= (SM501_DC_CRT_CONTROL_PIXEL_MASK |
623                     SM501_DC_CRT_CONTROL_GAMMA |
624                     SM501_DC_CRT_CONTROL_BLANK |
625                     SM501_DC_CRT_CONTROL_SEL |
626                     SM501_DC_CRT_CONTROL_CP |
627                     SM501_DC_CRT_CONTROL_TVP);
628
629         /* set the sync polarities before we check data source  */
630
631         if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0)
632                 control |= SM501_DC_CRT_CONTROL_HSP;
633
634         if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0)
635                 control |= SM501_DC_CRT_CONTROL_VSP;
636
637         if ((control & SM501_DC_CRT_CONTROL_SEL) == 0) {
638                 /* the head is displaying panel data... */
639
640                 sm501_alloc_mem(fbi, &par->screen, SM501_MEMF_CRT, 0);
641                 goto out_update;
642         }
643
644         ret = sm501fb_set_par_common(info, var);
645         if (ret) {
646                 dev_err(fbi->dev, "failed to set common parameters\n");
647                 return ret;
648         }
649
650         sm501fb_pan_crt(var, info);
651         sm501fb_set_par_geometry(info, var);
652
653         control |= SM501_FIFO_3;        /* fill if >3 free slots */
654
655         switch(var->bits_per_pixel) {
656         case 8:
657                 control |= SM501_DC_CRT_CONTROL_8BPP;
658                 break;
659
660         case 16:
661                 control |= SM501_DC_CRT_CONTROL_16BPP;
662                 sm501fb_setup_gamma(fbi, SM501_DC_CRT_PALETTE);
663                 break;
664
665         case 32:
666                 control |= SM501_DC_CRT_CONTROL_32BPP;
667                 sm501fb_setup_gamma(fbi, SM501_DC_CRT_PALETTE);
668                 break;
669
670         default:
671                 BUG();
672         }
673
674         control |= SM501_DC_CRT_CONTROL_SEL;    /* CRT displays CRT data */
675         control |= SM501_DC_CRT_CONTROL_TE;     /* enable CRT timing */
676         control |= SM501_DC_CRT_CONTROL_ENABLE; /* enable CRT plane */
677
678  out_update:
679         dev_dbg(fbi->dev, "new control is %08lx\n", control);
680
681         writel(control, fbi->regs + SM501_DC_CRT_CONTROL);
682         sm501fb_sync_regs(fbi);
683
684         return 0;
685 }
686
687 static void sm501fb_panel_power(struct sm501fb_info *fbi, int to)
688 {
689         unsigned long control;
690         void __iomem *ctrl_reg = fbi->regs + SM501_DC_PANEL_CONTROL;
691         struct sm501_platdata_fbsub *pd = fbi->pdata->fb_pnl;
692
693         control = readl(ctrl_reg);
694
695         if (to && (control & SM501_DC_PANEL_CONTROL_VDD) == 0) {
696                 /* enable panel power */
697
698                 control |= SM501_DC_PANEL_CONTROL_VDD;  /* FPVDDEN */
699                 writel(control, ctrl_reg);
700                 sm501fb_sync_regs(fbi);
701                 mdelay(10);
702
703                 control |= SM501_DC_PANEL_CONTROL_DATA; /* DATA */
704                 writel(control, ctrl_reg);
705                 sm501fb_sync_regs(fbi);
706                 mdelay(10);
707
708                 /* VBIASEN */
709
710                 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_VBIASEN)) {
711                         if (pd->flags & SM501FB_FLAG_PANEL_INV_VBIASEN)
712                                 control &= ~SM501_DC_PANEL_CONTROL_BIAS;
713                         else
714                                 control |= SM501_DC_PANEL_CONTROL_BIAS;
715
716                         writel(control, ctrl_reg);
717                         sm501fb_sync_regs(fbi);
718                         mdelay(10);
719                 }
720
721                 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_FPEN)) {
722                         if (pd->flags & SM501FB_FLAG_PANEL_INV_FPEN)
723                                 control &= ~SM501_DC_PANEL_CONTROL_FPEN;
724                         else
725                                 control |= SM501_DC_PANEL_CONTROL_FPEN;
726
727                         writel(control, ctrl_reg);
728                         sm501fb_sync_regs(fbi);
729                         mdelay(10);
730                 }
731         } else if (!to && (control & SM501_DC_PANEL_CONTROL_VDD) != 0) {
732                 /* disable panel power */
733                 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_FPEN)) {
734                         if (pd->flags & SM501FB_FLAG_PANEL_INV_FPEN)
735                                 control |= SM501_DC_PANEL_CONTROL_FPEN;
736                         else
737                                 control &= ~SM501_DC_PANEL_CONTROL_FPEN;
738
739                         writel(control, ctrl_reg);
740                         sm501fb_sync_regs(fbi);
741                         mdelay(10);
742                 }
743
744                 if (!(pd->flags & SM501FB_FLAG_PANEL_NO_VBIASEN)) {
745                         if (pd->flags & SM501FB_FLAG_PANEL_INV_VBIASEN)
746                                 control |= SM501_DC_PANEL_CONTROL_BIAS;
747                         else
748                                 control &= ~SM501_DC_PANEL_CONTROL_BIAS;
749
750                         writel(control, ctrl_reg);
751                         sm501fb_sync_regs(fbi);
752                         mdelay(10);
753                 }
754
755                 control &= ~SM501_DC_PANEL_CONTROL_DATA;
756                 writel(control, ctrl_reg);
757                 sm501fb_sync_regs(fbi);
758                 mdelay(10);
759
760                 control &= ~SM501_DC_PANEL_CONTROL_VDD;
761                 writel(control, ctrl_reg);
762                 sm501fb_sync_regs(fbi);
763                 mdelay(10);
764         }
765
766         sm501fb_sync_regs(fbi);
767 }
768
769 /* sm501fb_set_par_pnl
770  *
771  * Set the panel video mode from the fb_info structure
772 */
773
774 static int sm501fb_set_par_pnl(struct fb_info *info)
775 {
776         struct sm501fb_par  *par = info->par;
777         struct sm501fb_info *fbi = par->info;
778         struct fb_var_screeninfo *var = &info->var;
779         unsigned long control;
780         unsigned long reg;
781         int ret;
782
783         dev_dbg(fbi->dev, "%s(%p)\n", __func__, info);
784
785         /* activate this new configuration */
786
787         ret = sm501fb_set_par_common(info, var);
788         if (ret)
789                 return ret;
790
791         sm501fb_pan_pnl(var, info);
792         sm501fb_set_par_geometry(info, var);
793
794         /* update control register */
795
796         control = readl(fbi->regs + SM501_DC_PANEL_CONTROL);
797         control &= (SM501_DC_PANEL_CONTROL_GAMMA |
798                     SM501_DC_PANEL_CONTROL_VDD  |
799                     SM501_DC_PANEL_CONTROL_DATA |
800                     SM501_DC_PANEL_CONTROL_BIAS |
801                     SM501_DC_PANEL_CONTROL_FPEN |
802                     SM501_DC_PANEL_CONTROL_CP |
803                     SM501_DC_PANEL_CONTROL_CK |
804                     SM501_DC_PANEL_CONTROL_HP |
805                     SM501_DC_PANEL_CONTROL_VP |
806                     SM501_DC_PANEL_CONTROL_HPD |
807                     SM501_DC_PANEL_CONTROL_VPD);
808
809         control |= SM501_FIFO_3;        /* fill if >3 free slots */
810
811         switch(var->bits_per_pixel) {
812         case 8:
813                 control |= SM501_DC_PANEL_CONTROL_8BPP;
814                 break;
815
816         case 16:
817                 control |= SM501_DC_PANEL_CONTROL_16BPP;
818                 sm501fb_setup_gamma(fbi, SM501_DC_PANEL_PALETTE);
819                 break;
820
821         case 32:
822                 control |= SM501_DC_PANEL_CONTROL_32BPP;
823                 sm501fb_setup_gamma(fbi, SM501_DC_PANEL_PALETTE);
824                 break;
825
826         default:
827                 BUG();
828         }
829
830         writel(0x0, fbi->regs + SM501_DC_PANEL_PANNING_CONTROL);
831
832         /* panel plane top left and bottom right location */
833
834         writel(0x00, fbi->regs + SM501_DC_PANEL_TL_LOC);
835
836         reg  = var->xres - 1;
837         reg |= (var->yres - 1) << 16;
838
839         writel(reg, fbi->regs + SM501_DC_PANEL_BR_LOC);
840
841         /* program panel control register */
842
843         control |= SM501_DC_PANEL_CONTROL_TE;   /* enable PANEL timing */
844         control |= SM501_DC_PANEL_CONTROL_EN;   /* enable PANEL gfx plane */
845
846         if ((var->sync & FB_SYNC_HOR_HIGH_ACT) == 0)
847                 control |= SM501_DC_PANEL_CONTROL_HSP;
848
849         if ((var->sync & FB_SYNC_VERT_HIGH_ACT) == 0)
850                 control |= SM501_DC_PANEL_CONTROL_VSP;
851
852         writel(control, fbi->regs + SM501_DC_PANEL_CONTROL);
853         sm501fb_sync_regs(fbi);
854
855         /* ensure the panel interface is not tristated at this point */
856
857         sm501_modify_reg(fbi->dev->parent, SM501_SYSTEM_CONTROL,
858                          0, SM501_SYSCTRL_PANEL_TRISTATE);
859
860         /* power the panel up */
861         sm501fb_panel_power(fbi, 1);
862         return 0;
863 }
864
865
866 /* chan_to_field
867  *
868  * convert a colour value into a field position
869  *
870  * from pxafb.c
871 */
872
873 static inline unsigned int chan_to_field(unsigned int chan,
874                                          struct fb_bitfield *bf)
875 {
876         chan &= 0xffff;
877         chan >>= 16 - bf->length;
878         return chan << bf->offset;
879 }
880
881 /* sm501fb_setcolreg
882  *
883  * set the colour mapping for modes that support palettised data
884 */
885
886 static int sm501fb_setcolreg(unsigned regno,
887                              unsigned red, unsigned green, unsigned blue,
888                              unsigned transp, struct fb_info *info)
889 {
890         struct sm501fb_par  *par = info->par;
891         struct sm501fb_info *fbi = par->info;
892         void __iomem *base = fbi->regs;
893         unsigned int val;
894
895         if (par->head == HEAD_CRT)
896                 base += SM501_DC_CRT_PALETTE;
897         else
898                 base += SM501_DC_PANEL_PALETTE;
899
900         switch (info->fix.visual) {
901         case FB_VISUAL_TRUECOLOR:
902                 /* true-colour, use pseuo-palette */
903
904                 if (regno < 16) {
905                         u32 *pal = par->pseudo_palette;
906
907                         val  = chan_to_field(red,   &info->var.red);
908                         val |= chan_to_field(green, &info->var.green);
909                         val |= chan_to_field(blue,  &info->var.blue);
910
911                         pal[regno] = val;
912                 }
913                 break;
914
915         case FB_VISUAL_PSEUDOCOLOR:
916                 if (regno < 256) {
917                         val = (red >> 8) << 16;
918                         val |= (green >> 8) << 8;
919                         val |= blue >> 8;
920
921                         writel(val, base + (regno * 4));
922                 }
923
924                 break;
925
926         default:
927                 return 1;   /* unknown type */
928         }
929
930         return 0;
931 }
932
933 /* sm501fb_blank_pnl
934  *
935  * Blank or un-blank the panel interface
936 */
937
938 static int sm501fb_blank_pnl(int blank_mode, struct fb_info *info)
939 {
940         struct sm501fb_par  *par = info->par;
941         struct sm501fb_info *fbi = par->info;
942
943         dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info);
944
945         switch (blank_mode) {
946         case FB_BLANK_POWERDOWN:
947                 sm501fb_panel_power(fbi, 0);
948                 break;
949
950         case FB_BLANK_UNBLANK:
951                 sm501fb_panel_power(fbi, 1);
952                 break;
953
954         case FB_BLANK_NORMAL:
955         case FB_BLANK_VSYNC_SUSPEND:
956         case FB_BLANK_HSYNC_SUSPEND:
957         default:
958                 return 1;
959         }
960
961         return 0;
962 }
963
964 /* sm501fb_blank_crt
965  *
966  * Blank or un-blank the crt interface
967 */
968
969 static int sm501fb_blank_crt(int blank_mode, struct fb_info *info)
970 {
971         struct sm501fb_par  *par = info->par;
972         struct sm501fb_info *fbi = par->info;
973         unsigned long ctrl;
974
975         dev_dbg(fbi->dev, "%s(mode=%d, %p)\n", __func__, blank_mode, info);
976
977         ctrl = readl(fbi->regs + SM501_DC_CRT_CONTROL);
978
979         switch (blank_mode) {
980         case FB_BLANK_POWERDOWN:
981                 ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE;
982                 sm501_misc_control(fbi->dev->parent, SM501_MISC_DAC_POWER, 0);
983
984         case FB_BLANK_NORMAL:
985                 ctrl |= SM501_DC_CRT_CONTROL_BLANK;
986                 break;
987
988         case FB_BLANK_UNBLANK:
989                 ctrl &= ~SM501_DC_CRT_CONTROL_BLANK;
990                 ctrl |=  SM501_DC_CRT_CONTROL_ENABLE;
991                 sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER);
992                 break;
993
994         case FB_BLANK_VSYNC_SUSPEND:
995         case FB_BLANK_HSYNC_SUSPEND:
996         default:
997                 return 1;
998
999         }
1000
1001         writel(ctrl, fbi->regs + SM501_DC_CRT_CONTROL);
1002         sm501fb_sync_regs(fbi);
1003
1004         return 0;
1005 }
1006
1007 /* sm501fb_cursor
1008  *
1009  * set or change the hardware cursor parameters
1010 */
1011
1012 static int sm501fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
1013 {
1014         struct sm501fb_par  *par = info->par;
1015         struct sm501fb_info *fbi = par->info;
1016         void __iomem *base = fbi->regs;
1017         unsigned long hwc_addr;
1018         unsigned long fg, bg;
1019
1020         dev_dbg(fbi->dev, "%s(%p,%p)\n", __func__, info, cursor);
1021
1022         if (par->head == HEAD_CRT)
1023                 base += SM501_DC_CRT_HWC_BASE;
1024         else
1025                 base += SM501_DC_PANEL_HWC_BASE;
1026
1027         /* check not being asked to exceed capabilities */
1028
1029         if (cursor->image.width > 64)
1030                 return -EINVAL;
1031
1032         if (cursor->image.height > 64)
1033                 return -EINVAL;
1034
1035         if (cursor->image.depth > 1)
1036                 return -EINVAL;
1037
1038         hwc_addr = readl(base + SM501_OFF_HWC_ADDR);
1039
1040         if (cursor->enable)
1041                 writel(hwc_addr | SM501_HWC_EN, base + SM501_OFF_HWC_ADDR);
1042         else
1043                 writel(hwc_addr & ~SM501_HWC_EN, base + SM501_OFF_HWC_ADDR);
1044
1045         /* set data */
1046         if (cursor->set & FB_CUR_SETPOS) {
1047                 unsigned int x = cursor->image.dx;
1048                 unsigned int y = cursor->image.dy;
1049
1050                 if (x >= 2048 || y >= 2048 )
1051                         return -EINVAL;
1052
1053                 dev_dbg(fbi->dev, "set position %d,%d\n", x, y);
1054
1055                 //y += cursor->image.height;
1056
1057                 writel(x | (y << 16), base + SM501_OFF_HWC_LOC);
1058         }
1059
1060         if (cursor->set & FB_CUR_SETCMAP) {
1061                 unsigned int bg_col = cursor->image.bg_color;
1062                 unsigned int fg_col = cursor->image.fg_color;
1063
1064                 dev_dbg(fbi->dev, "%s: update cmap (%08x,%08x)\n",
1065                         __func__, bg_col, fg_col);
1066
1067                 bg = ((info->cmap.red[bg_col] & 0xF8) << 8) |
1068                         ((info->cmap.green[bg_col] & 0xFC) << 3) |
1069                         ((info->cmap.blue[bg_col] & 0xF8) >> 3);
1070
1071                 fg = ((info->cmap.red[fg_col] & 0xF8) << 8) |
1072                         ((info->cmap.green[fg_col] & 0xFC) << 3) |
1073                         ((info->cmap.blue[fg_col] & 0xF8) >> 3);
1074
1075                 dev_dbg(fbi->dev, "fgcol %08lx, bgcol %08lx\n", fg, bg);
1076
1077                 writel(bg, base + SM501_OFF_HWC_COLOR_1_2);
1078                 writel(fg, base + SM501_OFF_HWC_COLOR_3);
1079         }
1080
1081         if (cursor->set & FB_CUR_SETSIZE ||
1082             cursor->set & (FB_CUR_SETIMAGE | FB_CUR_SETSHAPE)) {
1083                 /* SM501 cursor is a two bpp 64x64 bitmap this routine
1084                  * clears it to transparent then combines the cursor
1085                  * shape plane with the colour plane to set the
1086                  * cursor */
1087                 int x, y;
1088                 const unsigned char *pcol = cursor->image.data;
1089                 const unsigned char *pmsk = cursor->mask;
1090                 void __iomem   *dst = par->cursor.k_addr;
1091                 unsigned char  dcol = 0;
1092                 unsigned char  dmsk = 0;
1093                 unsigned int   op;
1094
1095                 dev_dbg(fbi->dev, "%s: setting shape (%d,%d)\n",
1096                         __func__, cursor->image.width, cursor->image.height);
1097
1098                 for (op = 0; op < (64*64*2)/8; op+=4)
1099                         writel(0x0, dst + op);
1100
1101                 for (y = 0; y < cursor->image.height; y++) {
1102                         for (x = 0; x < cursor->image.width; x++) {
1103                                 if ((x % 8) == 0) {
1104                                         dcol = *pcol++;
1105                                         dmsk = *pmsk++;
1106                                 } else {
1107                                         dcol >>= 1;
1108                                         dmsk >>= 1;
1109                                 }
1110
1111                                 if (dmsk & 1) {
1112                                         op = (dcol & 1) ? 1 : 3;
1113                                         op <<= ((x % 4) * 2);
1114
1115                                         op |= readb(dst + (x / 4));
1116                                         writeb(op, dst + (x / 4));
1117                                 }
1118                         }
1119                         dst += (64*2)/8;
1120                 }
1121         }
1122
1123         sm501fb_sync_regs(fbi); /* ensure cursor data flushed */
1124         return 0;
1125 }
1126
1127 /* sm501fb_crtsrc_show
1128  *
1129  * device attribute code to show where the crt output is sourced from
1130 */
1131
1132 static ssize_t sm501fb_crtsrc_show(struct device *dev,
1133                                struct device_attribute *attr, char *buf)
1134 {
1135         struct sm501fb_info *info = dev_get_drvdata(dev);
1136         unsigned long ctrl;
1137
1138         ctrl = readl(info->regs + SM501_DC_CRT_CONTROL);
1139         ctrl &= SM501_DC_CRT_CONTROL_SEL;
1140
1141         return snprintf(buf, PAGE_SIZE, "%s\n", ctrl ? "crt" : "panel");
1142 }
1143
1144 /* sm501fb_crtsrc_show
1145  *
1146  * device attribute code to set where the crt output is sourced from
1147 */
1148
1149 static ssize_t sm501fb_crtsrc_store(struct device *dev,
1150                                 struct device_attribute *attr,
1151                                 const char *buf, size_t len)
1152 {
1153         struct sm501fb_info *info = dev_get_drvdata(dev);
1154         enum sm501_controller head;
1155         unsigned long ctrl;
1156
1157         if (len < 1)
1158                 return -EINVAL;
1159
1160         if (strnicmp(buf, "crt", 3) == 0)
1161                 head = HEAD_CRT;
1162         else if (strnicmp(buf, "panel", 5) == 0)
1163                 head = HEAD_PANEL;
1164         else
1165                 return -EINVAL;
1166
1167         dev_info(dev, "setting crt source to head %d\n", head);
1168
1169         ctrl = readl(info->regs + SM501_DC_CRT_CONTROL);
1170
1171         if (head == HEAD_CRT) {
1172                 ctrl |= SM501_DC_CRT_CONTROL_SEL;
1173                 ctrl |= SM501_DC_CRT_CONTROL_ENABLE;
1174                 ctrl |= SM501_DC_CRT_CONTROL_TE;
1175         } else {
1176                 ctrl &= ~SM501_DC_CRT_CONTROL_SEL;
1177                 ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE;
1178                 ctrl &= ~SM501_DC_CRT_CONTROL_TE;
1179         }
1180
1181         writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1182         sm501fb_sync_regs(info);
1183
1184         return len;
1185 }
1186
1187 /* Prepare the device_attr for registration with sysfs later */
1188 static DEVICE_ATTR(crt_src, 0666, sm501fb_crtsrc_show, sm501fb_crtsrc_store);
1189
1190 /* sm501fb_show_regs
1191  *
1192  * show the primary sm501 registers
1193 */
1194 static int sm501fb_show_regs(struct sm501fb_info *info, char *ptr,
1195                              unsigned int start, unsigned int len)
1196 {
1197         void __iomem *mem = info->regs;
1198         char *buf = ptr;
1199         unsigned int reg;
1200
1201         for (reg = start; reg < (len + start); reg += 4)
1202                 ptr += sprintf(ptr, "%08x = %08x\n", reg, readl(mem + reg));
1203
1204         return ptr - buf;
1205 }
1206
1207 /* sm501fb_debug_show_crt
1208  *
1209  * show the crt control and cursor registers
1210 */
1211
1212 static ssize_t sm501fb_debug_show_crt(struct device *dev,
1213                                   struct device_attribute *attr, char *buf)
1214 {
1215         struct sm501fb_info *info = dev_get_drvdata(dev);
1216         char *ptr = buf;
1217
1218         ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_CONTROL, 0x40);
1219         ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_HWC_BASE, 0x10);
1220
1221         return ptr - buf;
1222 }
1223
1224 static DEVICE_ATTR(fbregs_crt, 0444, sm501fb_debug_show_crt, NULL);
1225
1226 /* sm501fb_debug_show_pnl
1227  *
1228  * show the panel control and cursor registers
1229 */
1230
1231 static ssize_t sm501fb_debug_show_pnl(struct device *dev,
1232                                   struct device_attribute *attr, char *buf)
1233 {
1234         struct sm501fb_info *info = dev_get_drvdata(dev);
1235         char *ptr = buf;
1236
1237         ptr += sm501fb_show_regs(info, ptr, 0x0, 0x40);
1238         ptr += sm501fb_show_regs(info, ptr, SM501_DC_PANEL_HWC_BASE, 0x10);
1239
1240         return ptr - buf;
1241 }
1242
1243 static DEVICE_ATTR(fbregs_pnl, 0444, sm501fb_debug_show_pnl, NULL);
1244
1245 /* framebuffer ops */
1246
1247 static struct fb_ops sm501fb_ops_crt = {
1248         .owner          = THIS_MODULE,
1249         .fb_check_var   = sm501fb_check_var_crt,
1250         .fb_set_par     = sm501fb_set_par_crt,
1251         .fb_blank       = sm501fb_blank_crt,
1252         .fb_setcolreg   = sm501fb_setcolreg,
1253         .fb_pan_display = sm501fb_pan_crt,
1254         .fb_cursor      = sm501fb_cursor,
1255         .fb_fillrect    = cfb_fillrect,
1256         .fb_copyarea    = cfb_copyarea,
1257         .fb_imageblit   = cfb_imageblit,
1258 };
1259
1260 static struct fb_ops sm501fb_ops_pnl = {
1261         .owner          = THIS_MODULE,
1262         .fb_check_var   = sm501fb_check_var_pnl,
1263         .fb_set_par     = sm501fb_set_par_pnl,
1264         .fb_pan_display = sm501fb_pan_pnl,
1265         .fb_blank       = sm501fb_blank_pnl,
1266         .fb_setcolreg   = sm501fb_setcolreg,
1267         .fb_cursor      = sm501fb_cursor,
1268         .fb_fillrect    = cfb_fillrect,
1269         .fb_copyarea    = cfb_copyarea,
1270         .fb_imageblit   = cfb_imageblit,
1271 };
1272
1273 /* sm501_init_cursor
1274  *
1275  * initialise hw cursor parameters
1276 */
1277
1278 static int sm501_init_cursor(struct fb_info *fbi, unsigned int reg_base)
1279 {
1280         struct sm501fb_par *par;
1281         struct sm501fb_info *info;
1282         int ret;
1283
1284         if (fbi == NULL)
1285                 return 0;
1286
1287         par = fbi->par;
1288         info = par->info;
1289
1290         par->cursor_regs = info->regs + reg_base;
1291
1292         ret = sm501_alloc_mem(info, &par->cursor, SM501_MEMF_CURSOR, 1024);
1293         if (ret < 0)
1294                 return ret;
1295
1296         /* initialise the colour registers */
1297
1298         writel(par->cursor.sm_addr, par->cursor_regs + SM501_OFF_HWC_ADDR);
1299
1300         writel(0x00, par->cursor_regs + SM501_OFF_HWC_LOC);
1301         writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_1_2);
1302         writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_3);
1303         sm501fb_sync_regs(info);
1304
1305         return 0;
1306 }
1307
1308 /* sm501fb_info_start
1309  *
1310  * fills the par structure claiming resources and remapping etc.
1311 */
1312
1313 static int sm501fb_start(struct sm501fb_info *info,
1314                          struct platform_device *pdev)
1315 {
1316         struct resource *res;
1317         struct device *dev = &pdev->dev;
1318         int k;
1319         int ret;
1320
1321         info->irq = ret = platform_get_irq(pdev, 0);
1322         if (ret < 0) {
1323                 /* we currently do not use the IRQ */
1324                 dev_warn(dev, "no irq for device\n");
1325         }
1326
1327         /* allocate, reserve and remap resources for registers */
1328         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1329         if (res == NULL) {
1330                 dev_err(dev, "no resource definition for registers\n");
1331                 ret = -ENOENT;
1332                 goto err_release;
1333         }
1334
1335         info->regs_res = request_mem_region(res->start,
1336                                             res->end - res->start,
1337                                             pdev->name);
1338
1339         if (info->regs_res == NULL) {
1340                 dev_err(dev, "cannot claim registers\n");
1341                 ret = -ENXIO;
1342                 goto err_release;
1343         }
1344
1345         info->regs = ioremap(res->start, (res->end - res->start)+1);
1346         if (info->regs == NULL) {
1347                 dev_err(dev, "cannot remap registers\n");
1348                 ret = -ENXIO;
1349                 goto err_regs_res;
1350         }
1351
1352         /* allocate, reserve resources for framebuffer */
1353         res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
1354         if (res == NULL) {
1355                 dev_err(dev, "no memory resource defined\n");
1356                 ret = -ENXIO;
1357                 goto err_regs_map;
1358         }
1359
1360         info->fbmem_res = request_mem_region(res->start,
1361                                              (res->end - res->start)+1,
1362                                              pdev->name);
1363         if (info->fbmem_res == NULL) {
1364                 dev_err(dev, "cannot claim framebuffer\n");
1365                 ret = -ENXIO;
1366                 goto err_regs_map;
1367         }
1368
1369         info->fbmem = ioremap(res->start, (res->end - res->start)+1);
1370         if (info->fbmem == NULL) {
1371                 dev_err(dev, "cannot remap framebuffer\n");
1372                 goto err_mem_res;
1373         }
1374
1375         info->fbmem_len = (res->end - res->start)+1;
1376
1377         /* clear framebuffer memory - avoids garbage data on unused fb */
1378         memset(info->fbmem, 0, info->fbmem_len);
1379
1380         /* clear palette ram - undefined at power on */
1381         for (k = 0; k < (256 * 3); k++)
1382                 writel(0, info->regs + SM501_DC_PANEL_PALETTE + (k * 4));
1383
1384         /* enable display controller */
1385         sm501_unit_power(dev->parent, SM501_GATE_DISPLAY, 1);
1386
1387         /* setup cursors */
1388
1389         sm501_init_cursor(info->fb[HEAD_CRT], SM501_DC_CRT_HWC_ADDR);
1390         sm501_init_cursor(info->fb[HEAD_PANEL], SM501_DC_PANEL_HWC_ADDR);
1391
1392         return 0; /* everything is setup */
1393
1394  err_mem_res:
1395         release_resource(info->fbmem_res);
1396         kfree(info->fbmem_res);
1397
1398  err_regs_map:
1399         iounmap(info->regs);
1400
1401  err_regs_res:
1402         release_resource(info->regs_res);
1403         kfree(info->regs_res);
1404
1405  err_release:
1406         return ret;
1407 }
1408
1409 static void sm501fb_stop(struct sm501fb_info *info)
1410 {
1411         /* disable display controller */
1412         sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0);
1413
1414         iounmap(info->fbmem);
1415         release_resource(info->fbmem_res);
1416         kfree(info->fbmem_res);
1417
1418         iounmap(info->regs);
1419         release_resource(info->regs_res);
1420         kfree(info->regs_res);
1421 }
1422
1423 static int sm501fb_init_fb(struct fb_info *fb,
1424                            enum sm501_controller head,
1425                            const char *fbname)
1426 {
1427         struct sm501_platdata_fbsub *pd;
1428         struct sm501fb_par *par = fb->par;
1429         struct sm501fb_info *info = par->info;
1430         unsigned long ctrl;
1431         unsigned int enable;
1432         int ret;
1433
1434         switch (head) {
1435         case HEAD_CRT:
1436                 pd = info->pdata->fb_crt;
1437                 ctrl = readl(info->regs + SM501_DC_CRT_CONTROL);
1438                 enable = (ctrl & SM501_DC_CRT_CONTROL_ENABLE) ? 1 : 0;
1439
1440                 /* ensure we set the correct source register */
1441                 if (info->pdata->fb_route != SM501_FB_CRT_PANEL) {
1442                         ctrl |= SM501_DC_CRT_CONTROL_SEL;
1443                         writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1444                 }
1445
1446                 break;
1447
1448         case HEAD_PANEL:
1449                 pd = info->pdata->fb_pnl;
1450                 ctrl = readl(info->regs + SM501_DC_PANEL_CONTROL);
1451                 enable = (ctrl & SM501_DC_PANEL_CONTROL_EN) ? 1 : 0;
1452                 break;
1453
1454         default:
1455                 pd = NULL;              /* stop compiler warnings */
1456                 ctrl = 0;
1457                 enable = 0;
1458                 BUG();
1459         }
1460
1461         dev_info(info->dev, "fb %s %sabled at start\n",
1462                  fbname, enable ? "en" : "dis");
1463
1464         /* check to see if our routing allows this */
1465
1466         if (head == HEAD_CRT && info->pdata->fb_route == SM501_FB_CRT_PANEL) {
1467                 ctrl &= ~SM501_DC_CRT_CONTROL_SEL;
1468                 writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1469                 enable = 0;
1470         }
1471
1472         strlcpy(fb->fix.id, fbname, sizeof(fb->fix.id));
1473
1474         memcpy(&par->ops,
1475                (head == HEAD_CRT) ? &sm501fb_ops_crt : &sm501fb_ops_pnl,
1476                sizeof(struct fb_ops));
1477
1478         /* update ops dependant on what we've been passed */
1479
1480         if ((pd->flags & SM501FB_FLAG_USE_HWCURSOR) == 0)
1481                 par->ops.fb_cursor = NULL;
1482
1483         fb->fbops = &par->ops;
1484         fb->flags = FBINFO_FLAG_DEFAULT |
1485                 FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN;
1486
1487         /* fixed data */
1488
1489         fb->fix.type            = FB_TYPE_PACKED_PIXELS;
1490         fb->fix.type_aux        = 0;
1491         fb->fix.xpanstep        = 1;
1492         fb->fix.ypanstep        = 1;
1493         fb->fix.ywrapstep       = 0;
1494         fb->fix.accel           = FB_ACCEL_NONE;
1495
1496         /* screenmode */
1497
1498         fb->var.nonstd          = 0;
1499         fb->var.activate        = FB_ACTIVATE_NOW;
1500         fb->var.accel_flags     = 0;
1501         fb->var.vmode           = FB_VMODE_NONINTERLACED;
1502         fb->var.bits_per_pixel  = 16;
1503
1504         if (enable && (pd->flags & SM501FB_FLAG_USE_INIT_MODE) && 0) {
1505                 /* TODO read the mode from the current display */
1506
1507         } else {
1508                 if (pd->def_mode) {
1509                         dev_info(info->dev, "using supplied mode\n");
1510                         fb_videomode_to_var(&fb->var, pd->def_mode);
1511
1512                         fb->var.bits_per_pixel = pd->def_bpp ? pd->def_bpp : 8;
1513                         fb->var.xres_virtual = fb->var.xres;
1514                         fb->var.yres_virtual = fb->var.yres;
1515                 } else {
1516                         ret = fb_find_mode(&fb->var, fb,
1517                                            NULL, NULL, 0, NULL, 8);
1518
1519                         if (ret == 0 || ret == 4) {
1520                                 dev_err(info->dev,
1521                                         "failed to get initial mode\n");
1522                                 return -EINVAL;
1523                         }
1524                 }
1525         }
1526
1527         /* initialise and set the palette */
1528         fb_alloc_cmap(&fb->cmap, NR_PALETTE, 0);
1529         fb_set_cmap(&fb->cmap, fb);
1530
1531         ret = (fb->fbops->fb_check_var)(&fb->var, fb);
1532         if (ret)
1533                 dev_err(info->dev, "check_var() failed on initial setup?\n");
1534
1535         /* ensure we've activated our new configuration */
1536         (fb->fbops->fb_set_par)(fb);
1537
1538         return 0;
1539 }
1540
1541 /* default platform data if none is supplied (ie, PCI device) */
1542
1543 static struct sm501_platdata_fbsub sm501fb_pdata_crt = {
1544         .flags          = (SM501FB_FLAG_USE_INIT_MODE |
1545                            SM501FB_FLAG_USE_HWCURSOR |
1546                            SM501FB_FLAG_USE_HWACCEL |
1547                            SM501FB_FLAG_DISABLE_AT_EXIT),
1548
1549 };
1550
1551 static struct sm501_platdata_fbsub sm501fb_pdata_pnl = {
1552         .flags          = (SM501FB_FLAG_USE_INIT_MODE |
1553                            SM501FB_FLAG_USE_HWCURSOR |
1554                            SM501FB_FLAG_USE_HWACCEL |
1555                            SM501FB_FLAG_DISABLE_AT_EXIT),
1556 };
1557
1558 static struct sm501_platdata_fb sm501fb_def_pdata = {
1559         .fb_route               = SM501_FB_OWN,
1560         .fb_crt                 = &sm501fb_pdata_crt,
1561         .fb_pnl                 = &sm501fb_pdata_pnl,
1562 };
1563
1564 static char driver_name_crt[] = "sm501fb-crt";
1565 static char driver_name_pnl[] = "sm501fb-panel";
1566
1567 static int __devinit sm501fb_probe_one(struct sm501fb_info *info,
1568                                        enum sm501_controller head)
1569 {
1570         unsigned char *name = (head == HEAD_CRT) ? "crt" : "panel";
1571         struct sm501_platdata_fbsub *pd;
1572         struct sm501fb_par *par;
1573         struct fb_info *fbi;
1574
1575         pd = (head == HEAD_CRT) ? info->pdata->fb_crt : info->pdata->fb_pnl;
1576
1577         /* Do not initialise if we've not been given any platform data */
1578         if (pd == NULL) {
1579                 dev_info(info->dev, "no data for fb %s (disabled)\n", name);
1580                 return 0;
1581         }
1582
1583         fbi = framebuffer_alloc(sizeof(struct sm501fb_par), info->dev);
1584         if (fbi == NULL) {
1585                 dev_err(info->dev, "cannot allocate %s framebuffer\n", name);
1586                 return -ENOMEM;
1587         }
1588
1589         par = fbi->par;
1590         par->info = info;
1591         par->head = head;
1592         fbi->pseudo_palette = &par->pseudo_palette;
1593
1594         info->fb[head] = fbi;
1595
1596         return 0;
1597 }
1598
1599 /* Free up anything allocated by sm501fb_init_fb */
1600
1601 static void sm501_free_init_fb(struct sm501fb_info *info,
1602                                 enum sm501_controller head)
1603 {
1604         struct fb_info *fbi = info->fb[head];
1605
1606         fb_dealloc_cmap(&fbi->cmap);
1607 }
1608
1609 static int __devinit sm501fb_start_one(struct sm501fb_info *info,
1610                                        enum sm501_controller head,
1611                                        const char *drvname)
1612 {
1613         struct fb_info *fbi = info->fb[head];
1614         int ret;
1615
1616         if (!fbi)
1617                 return 0;
1618
1619         ret = sm501fb_init_fb(info->fb[head], head, drvname);
1620         if (ret) {
1621                 dev_err(info->dev, "cannot initialise fb %s\n", drvname);
1622                 return ret;
1623         }
1624
1625         ret = register_framebuffer(info->fb[head]);
1626         if (ret) {
1627                 dev_err(info->dev, "failed to register fb %s\n", drvname);
1628                 sm501_free_init_fb(info, head);
1629                 return ret;
1630         }
1631
1632         dev_info(info->dev, "fb%d: %s frame buffer\n", fbi->node, fbi->fix.id);
1633
1634         return 0;
1635 }
1636
1637 static int __devinit sm501fb_probe(struct platform_device *pdev)
1638 {
1639         struct sm501fb_info *info;
1640         struct device *dev = &pdev->dev;
1641         int ret;
1642
1643         /* allocate our framebuffers */
1644
1645         info = kzalloc(sizeof(struct sm501fb_info), GFP_KERNEL);
1646         if (!info) {
1647                 dev_err(dev, "failed to allocate state\n");
1648                 return -ENOMEM;
1649         }
1650
1651         info->dev = dev = &pdev->dev;
1652         platform_set_drvdata(pdev, info);
1653
1654         if (dev->parent->platform_data) {
1655                 struct sm501_platdata *pd = dev->parent->platform_data;
1656                 info->pdata = pd->fb;
1657         }
1658
1659         if (info->pdata == NULL) {
1660                 dev_info(dev, "using default configuration data\n");
1661                 info->pdata = &sm501fb_def_pdata;
1662         }
1663
1664         /* probe for the presence of each panel */
1665
1666         ret = sm501fb_probe_one(info, HEAD_CRT);
1667         if (ret < 0) {
1668                 dev_err(dev, "failed to probe CRT\n");
1669                 goto err_alloc;
1670         }
1671
1672         ret = sm501fb_probe_one(info, HEAD_PANEL);
1673         if (ret < 0) {
1674                 dev_err(dev, "failed to probe PANEL\n");
1675                 goto err_probed_crt;
1676         }
1677
1678         if (info->fb[HEAD_PANEL] == NULL &&
1679             info->fb[HEAD_CRT] == NULL) {
1680                 dev_err(dev, "no framebuffers found\n");
1681                 goto err_alloc;
1682         }
1683
1684         /* get the resources for both of the framebuffers */
1685
1686         ret = sm501fb_start(info, pdev);
1687         if (ret) {
1688                 dev_err(dev, "cannot initialise SM501\n");
1689                 goto err_probed_panel;
1690         }
1691
1692         ret = sm501fb_start_one(info, HEAD_CRT, driver_name_crt);
1693         if (ret) {
1694                 dev_err(dev, "failed to start CRT\n");
1695                 goto err_started;
1696         }
1697
1698         ret = sm501fb_start_one(info, HEAD_PANEL, driver_name_pnl);
1699         if (ret) {
1700                 dev_err(dev, "failed to start Panel\n");
1701                 goto err_started_crt;
1702         }
1703
1704         /* create device files */
1705
1706         ret = device_create_file(dev, &dev_attr_crt_src);
1707         if (ret)
1708                 goto err_started_panel;
1709
1710         ret = device_create_file(dev, &dev_attr_fbregs_pnl);
1711         if (ret)
1712                 goto err_attached_crtsrc_file;
1713
1714         ret = device_create_file(dev, &dev_attr_fbregs_crt);
1715         if (ret)
1716                 goto err_attached_pnlregs_file;
1717
1718         /* we registered, return ok */
1719         return 0;
1720
1721 err_attached_pnlregs_file:
1722         device_remove_file(dev, &dev_attr_fbregs_pnl);
1723
1724 err_attached_crtsrc_file:
1725         device_remove_file(dev, &dev_attr_crt_src);
1726
1727 err_started_panel:
1728         unregister_framebuffer(info->fb[HEAD_PANEL]);
1729         sm501_free_init_fb(info, HEAD_PANEL);
1730
1731 err_started_crt:
1732         unregister_framebuffer(info->fb[HEAD_CRT]);
1733         sm501_free_init_fb(info, HEAD_CRT);
1734
1735 err_started:
1736         sm501fb_stop(info);
1737
1738 err_probed_panel:
1739         framebuffer_release(info->fb[HEAD_PANEL]);
1740
1741 err_probed_crt:
1742         framebuffer_release(info->fb[HEAD_CRT]);
1743
1744 err_alloc:
1745         kfree(info);
1746
1747         return ret;
1748 }
1749
1750
1751 /*
1752  *  Cleanup
1753  */
1754 static int sm501fb_remove(struct platform_device *pdev)
1755 {
1756         struct sm501fb_info *info = platform_get_drvdata(pdev);
1757         struct fb_info     *fbinfo_crt = info->fb[0];
1758         struct fb_info     *fbinfo_pnl = info->fb[1];
1759
1760         device_remove_file(&pdev->dev, &dev_attr_fbregs_crt);
1761         device_remove_file(&pdev->dev, &dev_attr_fbregs_pnl);
1762         device_remove_file(&pdev->dev, &dev_attr_crt_src);
1763
1764         sm501_free_init_fb(info, HEAD_CRT);
1765         sm501_free_init_fb(info, HEAD_PANEL);
1766
1767         unregister_framebuffer(fbinfo_crt);
1768         unregister_framebuffer(fbinfo_pnl);
1769
1770         sm501fb_stop(info);
1771         kfree(info);
1772
1773         framebuffer_release(fbinfo_pnl);
1774         framebuffer_release(fbinfo_crt);
1775
1776         return 0;
1777 }
1778
1779 #ifdef CONFIG_PM
1780
1781 static int sm501fb_suspend_fb(struct sm501fb_info *info,
1782                               enum sm501_controller head)
1783 {
1784         struct fb_info *fbi = info->fb[head];
1785         struct sm501fb_par *par = fbi->par;
1786
1787         if (par->screen.size == 0)
1788                 return 0;
1789
1790         /* blank the relevant interface to ensure unit power minimised */
1791         (par->ops.fb_blank)(FB_BLANK_POWERDOWN, fbi);
1792
1793         /* tell console/fb driver we are suspending */
1794
1795         acquire_console_sem();
1796         fb_set_suspend(fbi, 1);
1797         release_console_sem();
1798
1799         /* backup copies in case chip is powered down over suspend */
1800
1801         par->store_fb = vmalloc(par->screen.size);
1802         if (par->store_fb == NULL) {
1803                 dev_err(info->dev, "no memory to store screen\n");
1804                 return -ENOMEM;
1805         }
1806
1807         par->store_cursor = vmalloc(par->cursor.size);
1808         if (par->store_cursor == NULL) {
1809                 dev_err(info->dev, "no memory to store cursor\n");
1810                 goto err_nocursor;
1811         }
1812
1813         dev_dbg(info->dev, "suspending screen to %p\n", par->store_fb);
1814         dev_dbg(info->dev, "suspending cursor to %p\n", par->store_cursor);
1815
1816         memcpy_fromio(par->store_fb, par->screen.k_addr, par->screen.size);
1817         memcpy_fromio(par->store_cursor, par->cursor.k_addr, par->cursor.size);
1818
1819         return 0;
1820
1821  err_nocursor:
1822         vfree(par->store_fb);
1823         par->store_fb = NULL;
1824
1825         return -ENOMEM;
1826 }
1827
1828 static void sm501fb_resume_fb(struct sm501fb_info *info,
1829                               enum sm501_controller head)
1830 {
1831         struct fb_info *fbi = info->fb[head];
1832         struct sm501fb_par *par = fbi->par;
1833
1834         if (par->screen.size == 0)
1835                 return;
1836
1837         /* re-activate the configuration */
1838
1839         (par->ops.fb_set_par)(fbi);
1840
1841         /* restore the data */
1842
1843         dev_dbg(info->dev, "restoring screen from %p\n", par->store_fb);
1844         dev_dbg(info->dev, "restoring cursor from %p\n", par->store_cursor);
1845
1846         if (par->store_fb)
1847                 memcpy_toio(par->screen.k_addr, par->store_fb,
1848                             par->screen.size);
1849
1850         if (par->store_cursor)
1851                 memcpy_toio(par->cursor.k_addr, par->store_cursor,
1852                             par->cursor.size);
1853
1854         acquire_console_sem();
1855         fb_set_suspend(fbi, 0);
1856         release_console_sem();
1857
1858         vfree(par->store_fb);
1859         vfree(par->store_cursor);
1860 }
1861
1862
1863 /* suspend and resume support */
1864
1865 static int sm501fb_suspend(struct platform_device *pdev, pm_message_t state)
1866 {
1867         struct sm501fb_info *info = platform_get_drvdata(pdev);
1868
1869         /* store crt control to resume with */
1870         info->pm_crt_ctrl = readl(info->regs + SM501_DC_CRT_CONTROL);
1871
1872         sm501fb_suspend_fb(info, HEAD_CRT);
1873         sm501fb_suspend_fb(info, HEAD_PANEL);
1874
1875         /* turn off the clocks, in case the device is not powered down */
1876         sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0);
1877
1878         return 0;
1879 }
1880
1881 #define SM501_CRT_CTRL_SAVE (SM501_DC_CRT_CONTROL_TVP |        \
1882                              SM501_DC_CRT_CONTROL_SEL)
1883
1884
1885 static int sm501fb_resume(struct platform_device *pdev)
1886 {
1887         struct sm501fb_info *info = platform_get_drvdata(pdev);
1888         unsigned long crt_ctrl;
1889
1890         sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 1);
1891
1892         /* restore the items we want to be saved for crt control */
1893
1894         crt_ctrl = readl(info->regs + SM501_DC_CRT_CONTROL);
1895         crt_ctrl &= ~SM501_CRT_CTRL_SAVE;
1896         crt_ctrl |= info->pm_crt_ctrl & SM501_CRT_CTRL_SAVE;
1897         writel(crt_ctrl, info->regs + SM501_DC_CRT_CONTROL);
1898
1899         sm501fb_resume_fb(info, HEAD_CRT);
1900         sm501fb_resume_fb(info, HEAD_PANEL);
1901
1902         return 0;
1903 }
1904
1905 #else
1906 #define sm501fb_suspend NULL
1907 #define sm501fb_resume  NULL
1908 #endif
1909
1910 static struct platform_driver sm501fb_driver = {
1911         .probe          = sm501fb_probe,
1912         .remove         = sm501fb_remove,
1913         .suspend        = sm501fb_suspend,
1914         .resume         = sm501fb_resume,
1915         .driver         = {
1916                 .name   = "sm501-fb",
1917                 .owner  = THIS_MODULE,
1918         },
1919 };
1920
1921 static int __devinit sm501fb_init(void)
1922 {
1923         return platform_driver_register(&sm501fb_driver);
1924 }
1925
1926 static void __exit sm501fb_cleanup(void)
1927 {
1928         platform_driver_unregister(&sm501fb_driver);
1929 }
1930
1931 module_init(sm501fb_init);
1932 module_exit(sm501fb_cleanup);
1933
1934 MODULE_AUTHOR("Ben Dooks, Vincent Sanders");
1935 MODULE_DESCRIPTION("SM501 Framebuffer driver");
1936 MODULE_LICENSE("GPL v2");