drivers/video/sm501fb.c: Convert release_resource to release_mem_region
[linux-2.6.git] / 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 #include <linux/io.h>
33
34 #include <asm/uaccess.h>
35 #include <asm/div64.h>
36
37 #ifdef CONFIG_PM
38 #include <linux/pm.h>
39 #endif
40
41 #include <linux/sm501.h>
42 #include <linux/sm501-regs.h>
43
44 #include "edid.h"
45
46 static char *fb_mode = "640x480-16@60";
47 static unsigned long default_bpp = 16;
48
49 static struct fb_videomode __devinitdata 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
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
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
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
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
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
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
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
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
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
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
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
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 = 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
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 | (var->xres_virtual << 16);
618         smc501_writel(reg, fbi->regs + SM501_DC_PANEL_FB_WIDTH);
619
620         reg = var->yoffset | (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
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
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
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
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
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
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
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
1012         case FB_BLANK_NORMAL:
1013                 ctrl |= SM501_DC_CRT_CONTROL_BLANK;
1014                 break;
1015
1016         case FB_BLANK_UNBLANK:
1017                 ctrl &= ~SM501_DC_CRT_CONTROL_BLANK;
1018                 ctrl |=  SM501_DC_CRT_CONTROL_ENABLE;
1019                 sm501_misc_control(fbi->dev->parent, 0, SM501_MISC_DAC_POWER);
1020                 break;
1021
1022         case FB_BLANK_VSYNC_SUSPEND:
1023         case FB_BLANK_HSYNC_SUSPEND:
1024         default:
1025                 return 1;
1026
1027         }
1028
1029         smc501_writel(ctrl, fbi->regs + SM501_DC_CRT_CONTROL);
1030         sm501fb_sync_regs(fbi);
1031
1032         return 0;
1033 }
1034
1035 /* sm501fb_cursor
1036  *
1037  * set or change the hardware cursor parameters
1038 */
1039
1040 static int sm501fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
1041 {
1042         struct sm501fb_par  *par = info->par;
1043         struct sm501fb_info *fbi = par->info;
1044         void __iomem *base = fbi->regs;
1045         unsigned long hwc_addr;
1046         unsigned long fg, bg;
1047
1048         dev_dbg(fbi->dev, "%s(%p,%p)\n", __func__, info, cursor);
1049
1050         if (par->head == HEAD_CRT)
1051                 base += SM501_DC_CRT_HWC_BASE;
1052         else
1053                 base += SM501_DC_PANEL_HWC_BASE;
1054
1055         /* check not being asked to exceed capabilities */
1056
1057         if (cursor->image.width > 64)
1058                 return -EINVAL;
1059
1060         if (cursor->image.height > 64)
1061                 return -EINVAL;
1062
1063         if (cursor->image.depth > 1)
1064                 return -EINVAL;
1065
1066         hwc_addr = smc501_readl(base + SM501_OFF_HWC_ADDR);
1067
1068         if (cursor->enable)
1069                 smc501_writel(hwc_addr | SM501_HWC_EN,
1070                                 base + SM501_OFF_HWC_ADDR);
1071         else
1072                 smc501_writel(hwc_addr & ~SM501_HWC_EN,
1073                                 base + SM501_OFF_HWC_ADDR);
1074
1075         /* set data */
1076         if (cursor->set & FB_CUR_SETPOS) {
1077                 unsigned int x = cursor->image.dx;
1078                 unsigned int y = cursor->image.dy;
1079
1080                 if (x >= 2048 || y >= 2048 )
1081                         return -EINVAL;
1082
1083                 dev_dbg(fbi->dev, "set position %d,%d\n", x, y);
1084
1085                 //y += cursor->image.height;
1086
1087                 smc501_writel(x | (y << 16), base + SM501_OFF_HWC_LOC);
1088         }
1089
1090         if (cursor->set & FB_CUR_SETCMAP) {
1091                 unsigned int bg_col = cursor->image.bg_color;
1092                 unsigned int fg_col = cursor->image.fg_color;
1093
1094                 dev_dbg(fbi->dev, "%s: update cmap (%08x,%08x)\n",
1095                         __func__, bg_col, fg_col);
1096
1097                 bg = ((info->cmap.red[bg_col] & 0xF8) << 8) |
1098                         ((info->cmap.green[bg_col] & 0xFC) << 3) |
1099                         ((info->cmap.blue[bg_col] & 0xF8) >> 3);
1100
1101                 fg = ((info->cmap.red[fg_col] & 0xF8) << 8) |
1102                         ((info->cmap.green[fg_col] & 0xFC) << 3) |
1103                         ((info->cmap.blue[fg_col] & 0xF8) >> 3);
1104
1105                 dev_dbg(fbi->dev, "fgcol %08lx, bgcol %08lx\n", fg, bg);
1106
1107                 smc501_writel(bg, base + SM501_OFF_HWC_COLOR_1_2);
1108                 smc501_writel(fg, base + SM501_OFF_HWC_COLOR_3);
1109         }
1110
1111         if (cursor->set & FB_CUR_SETSIZE ||
1112             cursor->set & (FB_CUR_SETIMAGE | FB_CUR_SETSHAPE)) {
1113                 /* SM501 cursor is a two bpp 64x64 bitmap this routine
1114                  * clears it to transparent then combines the cursor
1115                  * shape plane with the colour plane to set the
1116                  * cursor */
1117                 int x, y;
1118                 const unsigned char *pcol = cursor->image.data;
1119                 const unsigned char *pmsk = cursor->mask;
1120                 void __iomem   *dst = par->cursor.k_addr;
1121                 unsigned char  dcol = 0;
1122                 unsigned char  dmsk = 0;
1123                 unsigned int   op;
1124
1125                 dev_dbg(fbi->dev, "%s: setting shape (%d,%d)\n",
1126                         __func__, cursor->image.width, cursor->image.height);
1127
1128                 for (op = 0; op < (64*64*2)/8; op+=4)
1129                         smc501_writel(0x0, dst + op);
1130
1131                 for (y = 0; y < cursor->image.height; y++) {
1132                         for (x = 0; x < cursor->image.width; x++) {
1133                                 if ((x % 8) == 0) {
1134                                         dcol = *pcol++;
1135                                         dmsk = *pmsk++;
1136                                 } else {
1137                                         dcol >>= 1;
1138                                         dmsk >>= 1;
1139                                 }
1140
1141                                 if (dmsk & 1) {
1142                                         op = (dcol & 1) ? 1 : 3;
1143                                         op <<= ((x % 4) * 2);
1144
1145                                         op |= readb(dst + (x / 4));
1146                                         writeb(op, dst + (x / 4));
1147                                 }
1148                         }
1149                         dst += (64*2)/8;
1150                 }
1151         }
1152
1153         sm501fb_sync_regs(fbi); /* ensure cursor data flushed */
1154         return 0;
1155 }
1156
1157 /* sm501fb_crtsrc_show
1158  *
1159  * device attribute code to show where the crt output is sourced from
1160 */
1161
1162 static ssize_t sm501fb_crtsrc_show(struct device *dev,
1163                                struct device_attribute *attr, char *buf)
1164 {
1165         struct sm501fb_info *info = dev_get_drvdata(dev);
1166         unsigned long ctrl;
1167
1168         ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
1169         ctrl &= SM501_DC_CRT_CONTROL_SEL;
1170
1171         return snprintf(buf, PAGE_SIZE, "%s\n", ctrl ? "crt" : "panel");
1172 }
1173
1174 /* sm501fb_crtsrc_show
1175  *
1176  * device attribute code to set where the crt output is sourced from
1177 */
1178
1179 static ssize_t sm501fb_crtsrc_store(struct device *dev,
1180                                 struct device_attribute *attr,
1181                                 const char *buf, size_t len)
1182 {
1183         struct sm501fb_info *info = dev_get_drvdata(dev);
1184         enum sm501_controller head;
1185         unsigned long ctrl;
1186
1187         if (len < 1)
1188                 return -EINVAL;
1189
1190         if (strnicmp(buf, "crt", 3) == 0)
1191                 head = HEAD_CRT;
1192         else if (strnicmp(buf, "panel", 5) == 0)
1193                 head = HEAD_PANEL;
1194         else
1195                 return -EINVAL;
1196
1197         dev_info(dev, "setting crt source to head %d\n", head);
1198
1199         ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
1200
1201         if (head == HEAD_CRT) {
1202                 ctrl |= SM501_DC_CRT_CONTROL_SEL;
1203                 ctrl |= SM501_DC_CRT_CONTROL_ENABLE;
1204                 ctrl |= SM501_DC_CRT_CONTROL_TE;
1205         } else {
1206                 ctrl &= ~SM501_DC_CRT_CONTROL_SEL;
1207                 ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE;
1208                 ctrl &= ~SM501_DC_CRT_CONTROL_TE;
1209         }
1210
1211         smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1212         sm501fb_sync_regs(info);
1213
1214         return len;
1215 }
1216
1217 /* Prepare the device_attr for registration with sysfs later */
1218 static DEVICE_ATTR(crt_src, 0666, sm501fb_crtsrc_show, sm501fb_crtsrc_store);
1219
1220 /* sm501fb_show_regs
1221  *
1222  * show the primary sm501 registers
1223 */
1224 static int sm501fb_show_regs(struct sm501fb_info *info, char *ptr,
1225                              unsigned int start, unsigned int len)
1226 {
1227         void __iomem *mem = info->regs;
1228         char *buf = ptr;
1229         unsigned int reg;
1230
1231         for (reg = start; reg < (len + start); reg += 4)
1232                 ptr += sprintf(ptr, "%08x = %08x\n", reg,
1233                                 smc501_readl(mem + reg));
1234
1235         return ptr - buf;
1236 }
1237
1238 /* sm501fb_debug_show_crt
1239  *
1240  * show the crt control and cursor registers
1241 */
1242
1243 static ssize_t sm501fb_debug_show_crt(struct device *dev,
1244                                   struct device_attribute *attr, char *buf)
1245 {
1246         struct sm501fb_info *info = dev_get_drvdata(dev);
1247         char *ptr = buf;
1248
1249         ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_CONTROL, 0x40);
1250         ptr += sm501fb_show_regs(info, ptr, SM501_DC_CRT_HWC_BASE, 0x10);
1251
1252         return ptr - buf;
1253 }
1254
1255 static DEVICE_ATTR(fbregs_crt, 0444, sm501fb_debug_show_crt, NULL);
1256
1257 /* sm501fb_debug_show_pnl
1258  *
1259  * show the panel control and cursor registers
1260 */
1261
1262 static ssize_t sm501fb_debug_show_pnl(struct device *dev,
1263                                   struct device_attribute *attr, char *buf)
1264 {
1265         struct sm501fb_info *info = dev_get_drvdata(dev);
1266         char *ptr = buf;
1267
1268         ptr += sm501fb_show_regs(info, ptr, 0x0, 0x40);
1269         ptr += sm501fb_show_regs(info, ptr, SM501_DC_PANEL_HWC_BASE, 0x10);
1270
1271         return ptr - buf;
1272 }
1273
1274 static DEVICE_ATTR(fbregs_pnl, 0444, sm501fb_debug_show_pnl, NULL);
1275
1276 /* acceleration operations */
1277 static int sm501fb_sync(struct fb_info *info)
1278 {
1279         int count = 1000000;
1280         struct sm501fb_par  *par = info->par;
1281         struct sm501fb_info *fbi = par->info;
1282
1283         /* wait for the 2d engine to be ready */
1284         while ((count > 0) &&
1285                (smc501_readl(fbi->regs + SM501_SYSTEM_CONTROL) &
1286                 SM501_SYSCTRL_2D_ENGINE_STATUS) != 0)
1287                 count--;
1288
1289         if (count <= 0) {
1290                 dev_err(info->dev, "Timeout waiting for 2d engine sync\n");
1291                 return 1;
1292         }
1293         return 0;
1294 }
1295
1296 static void sm501fb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
1297 {
1298         struct sm501fb_par  *par = info->par;
1299         struct sm501fb_info *fbi = par->info;
1300         int width = area->width;
1301         int height = area->height;
1302         int sx = area->sx;
1303         int sy = area->sy;
1304         int dx = area->dx;
1305         int dy = area->dy;
1306         unsigned long rtl = 0;
1307
1308         /* source clip */
1309         if ((sx >= info->var.xres_virtual) ||
1310             (sy >= info->var.yres_virtual))
1311                 /* source Area not within virtual screen, skipping */
1312                 return;
1313         if ((sx + width) >= info->var.xres_virtual)
1314                 width = info->var.xres_virtual - sx - 1;
1315         if ((sy + height) >= info->var.yres_virtual)
1316                 height = info->var.yres_virtual - sy - 1;
1317
1318         /* dest clip */
1319         if ((dx >= info->var.xres_virtual) ||
1320             (dy >= info->var.yres_virtual))
1321                 /* Destination Area not within virtual screen, skipping */
1322                 return;
1323         if ((dx + width) >= info->var.xres_virtual)
1324                 width = info->var.xres_virtual - dx - 1;
1325         if ((dy + height) >= info->var.yres_virtual)
1326                 height = info->var.yres_virtual - dy - 1;
1327
1328         if ((sx < dx) || (sy < dy)) {
1329                 rtl = 1 << 27;
1330                 sx += width - 1;
1331                 dx += width - 1;
1332                 sy += height - 1;
1333                 dy += height - 1;
1334         }
1335
1336         if (sm501fb_sync(info))
1337                 return;
1338
1339         /* set the base addresses */
1340         smc501_writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE);
1341         smc501_writel(par->screen.sm_addr,
1342                         fbi->regs2d + SM501_2D_DESTINATION_BASE);
1343
1344         /* set the window width */
1345         smc501_writel((info->var.xres << 16) | info->var.xres,
1346                fbi->regs2d + SM501_2D_WINDOW_WIDTH);
1347
1348         /* set window stride */
1349         smc501_writel((info->var.xres_virtual << 16) | info->var.xres_virtual,
1350                fbi->regs2d + SM501_2D_PITCH);
1351
1352         /* set data format */
1353         switch (info->var.bits_per_pixel) {
1354         case 8:
1355                 smc501_writel(0, fbi->regs2d + SM501_2D_STRETCH);
1356                 break;
1357         case 16:
1358                 smc501_writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH);
1359                 break;
1360         case 32:
1361                 smc501_writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH);
1362                 break;
1363         }
1364
1365         /* 2d compare mask */
1366         smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK);
1367
1368         /* 2d mask */
1369         smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_MASK);
1370
1371         /* source and destination x y */
1372         smc501_writel((sx << 16) | sy, fbi->regs2d + SM501_2D_SOURCE);
1373         smc501_writel((dx << 16) | dy, fbi->regs2d + SM501_2D_DESTINATION);
1374
1375         /* w/h */
1376         smc501_writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION);
1377
1378         /* do area move */
1379         smc501_writel(0x800000cc | rtl, fbi->regs2d + SM501_2D_CONTROL);
1380 }
1381
1382 static void sm501fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
1383 {
1384         struct sm501fb_par  *par = info->par;
1385         struct sm501fb_info *fbi = par->info;
1386         int width = rect->width, height = rect->height;
1387
1388         if ((rect->dx >= info->var.xres_virtual) ||
1389             (rect->dy >= info->var.yres_virtual))
1390                 /* Rectangle not within virtual screen, skipping */
1391                 return;
1392         if ((rect->dx + width) >= info->var.xres_virtual)
1393                 width = info->var.xres_virtual - rect->dx - 1;
1394         if ((rect->dy + height) >= info->var.yres_virtual)
1395                 height = info->var.yres_virtual - rect->dy - 1;
1396
1397         if (sm501fb_sync(info))
1398                 return;
1399
1400         /* set the base addresses */
1401         smc501_writel(par->screen.sm_addr, fbi->regs2d + SM501_2D_SOURCE_BASE);
1402         smc501_writel(par->screen.sm_addr,
1403                         fbi->regs2d + SM501_2D_DESTINATION_BASE);
1404
1405         /* set the window width */
1406         smc501_writel((info->var.xres << 16) | info->var.xres,
1407                fbi->regs2d + SM501_2D_WINDOW_WIDTH);
1408
1409         /* set window stride */
1410         smc501_writel((info->var.xres_virtual << 16) | info->var.xres_virtual,
1411                fbi->regs2d + SM501_2D_PITCH);
1412
1413         /* set data format */
1414         switch (info->var.bits_per_pixel) {
1415         case 8:
1416                 smc501_writel(0, fbi->regs2d + SM501_2D_STRETCH);
1417                 break;
1418         case 16:
1419                 smc501_writel(0x00100000, fbi->regs2d + SM501_2D_STRETCH);
1420                 break;
1421         case 32:
1422                 smc501_writel(0x00200000, fbi->regs2d + SM501_2D_STRETCH);
1423                 break;
1424         }
1425
1426         /* 2d compare mask */
1427         smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_COLOR_COMPARE_MASK);
1428
1429         /* 2d mask */
1430         smc501_writel(0xffffffff, fbi->regs2d + SM501_2D_MASK);
1431
1432         /* colour */
1433         smc501_writel(rect->color, fbi->regs2d + SM501_2D_FOREGROUND);
1434
1435         /* x y */
1436         smc501_writel((rect->dx << 16) | rect->dy,
1437                         fbi->regs2d + SM501_2D_DESTINATION);
1438
1439         /* w/h */
1440         smc501_writel((width << 16) | height, fbi->regs2d + SM501_2D_DIMENSION);
1441
1442         /* do rectangle fill */
1443         smc501_writel(0x800100cc, fbi->regs2d + SM501_2D_CONTROL);
1444 }
1445
1446
1447 static struct fb_ops sm501fb_ops_crt = {
1448         .owner          = THIS_MODULE,
1449         .fb_check_var   = sm501fb_check_var_crt,
1450         .fb_set_par     = sm501fb_set_par_crt,
1451         .fb_blank       = sm501fb_blank_crt,
1452         .fb_setcolreg   = sm501fb_setcolreg,
1453         .fb_pan_display = sm501fb_pan_crt,
1454         .fb_cursor      = sm501fb_cursor,
1455         .fb_fillrect    = sm501fb_fillrect,
1456         .fb_copyarea    = sm501fb_copyarea,
1457         .fb_imageblit   = cfb_imageblit,
1458         .fb_sync        = sm501fb_sync,
1459 };
1460
1461 static struct fb_ops sm501fb_ops_pnl = {
1462         .owner          = THIS_MODULE,
1463         .fb_check_var   = sm501fb_check_var_pnl,
1464         .fb_set_par     = sm501fb_set_par_pnl,
1465         .fb_pan_display = sm501fb_pan_pnl,
1466         .fb_blank       = sm501fb_blank_pnl,
1467         .fb_setcolreg   = sm501fb_setcolreg,
1468         .fb_cursor      = sm501fb_cursor,
1469         .fb_fillrect    = sm501fb_fillrect,
1470         .fb_copyarea    = sm501fb_copyarea,
1471         .fb_imageblit   = cfb_imageblit,
1472         .fb_sync        = sm501fb_sync,
1473 };
1474
1475 /* sm501_init_cursor
1476  *
1477  * initialise hw cursor parameters
1478 */
1479
1480 static int sm501_init_cursor(struct fb_info *fbi, unsigned int reg_base)
1481 {
1482         struct sm501fb_par *par;
1483         struct sm501fb_info *info;
1484         int ret;
1485
1486         if (fbi == NULL)
1487                 return 0;
1488
1489         par = fbi->par;
1490         info = par->info;
1491
1492         par->cursor_regs = info->regs + reg_base;
1493
1494         ret = sm501_alloc_mem(info, &par->cursor, SM501_MEMF_CURSOR, 1024,
1495                               fbi->fix.smem_len);
1496         if (ret < 0)
1497                 return ret;
1498
1499         /* initialise the colour registers */
1500
1501         smc501_writel(par->cursor.sm_addr,
1502                         par->cursor_regs + SM501_OFF_HWC_ADDR);
1503
1504         smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_LOC);
1505         smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_1_2);
1506         smc501_writel(0x00, par->cursor_regs + SM501_OFF_HWC_COLOR_3);
1507         sm501fb_sync_regs(info);
1508
1509         return 0;
1510 }
1511
1512 /* sm501fb_info_start
1513  *
1514  * fills the par structure claiming resources and remapping etc.
1515 */
1516
1517 static int sm501fb_start(struct sm501fb_info *info,
1518                          struct platform_device *pdev)
1519 {
1520         struct resource *res;
1521         struct device *dev = &pdev->dev;
1522         int k;
1523         int ret;
1524
1525         info->irq = ret = platform_get_irq(pdev, 0);
1526         if (ret < 0) {
1527                 /* we currently do not use the IRQ */
1528                 dev_warn(dev, "no irq for device\n");
1529         }
1530
1531         /* allocate, reserve and remap resources for display
1532          * controller registers */
1533         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1534         if (res == NULL) {
1535                 dev_err(dev, "no resource definition for registers\n");
1536                 ret = -ENOENT;
1537                 goto err_release;
1538         }
1539
1540         info->regs_res = request_mem_region(res->start,
1541                                             resource_size(res),
1542                                             pdev->name);
1543
1544         if (info->regs_res == NULL) {
1545                 dev_err(dev, "cannot claim registers\n");
1546                 ret = -ENXIO;
1547                 goto err_release;
1548         }
1549
1550         info->regs = ioremap(res->start, resource_size(res));
1551         if (info->regs == NULL) {
1552                 dev_err(dev, "cannot remap registers\n");
1553                 ret = -ENXIO;
1554                 goto err_regs_res;
1555         }
1556
1557         /* allocate, reserve and remap resources for 2d
1558          * controller registers */
1559         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1560         if (res == NULL) {
1561                 dev_err(dev, "no resource definition for 2d registers\n");
1562                 ret = -ENOENT;
1563                 goto err_regs_map;
1564         }
1565
1566         info->regs2d_res = request_mem_region(res->start,
1567                                               resource_size(res),
1568                                               pdev->name);
1569
1570         if (info->regs2d_res == NULL) {
1571                 dev_err(dev, "cannot claim registers\n");
1572                 ret = -ENXIO;
1573                 goto err_regs_map;
1574         }
1575
1576         info->regs2d = ioremap(res->start, resource_size(res));
1577         if (info->regs2d == NULL) {
1578                 dev_err(dev, "cannot remap registers\n");
1579                 ret = -ENXIO;
1580                 goto err_regs2d_res;
1581         }
1582
1583         /* allocate, reserve resources for framebuffer */
1584         res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
1585         if (res == NULL) {
1586                 dev_err(dev, "no memory resource defined\n");
1587                 ret = -ENXIO;
1588                 goto err_regs2d_map;
1589         }
1590
1591         info->fbmem_res = request_mem_region(res->start,
1592                                              resource_size(res),
1593                                              pdev->name);
1594         if (info->fbmem_res == NULL) {
1595                 dev_err(dev, "cannot claim framebuffer\n");
1596                 ret = -ENXIO;
1597                 goto err_regs2d_map;
1598         }
1599
1600         info->fbmem = ioremap(res->start, resource_size(res));
1601         if (info->fbmem == NULL) {
1602                 dev_err(dev, "cannot remap framebuffer\n");
1603                 goto err_mem_res;
1604         }
1605
1606         info->fbmem_len = resource_size(res);
1607
1608         /* clear framebuffer memory - avoids garbage data on unused fb */
1609         memset(info->fbmem, 0, info->fbmem_len);
1610
1611         /* clear palette ram - undefined at power on */
1612         for (k = 0; k < (256 * 3); k++)
1613                 smc501_writel(0, info->regs + SM501_DC_PANEL_PALETTE + (k * 4));
1614
1615         /* enable display controller */
1616         sm501_unit_power(dev->parent, SM501_GATE_DISPLAY, 1);
1617
1618         /* enable 2d controller */
1619         sm501_unit_power(dev->parent, SM501_GATE_2D_ENGINE, 1);
1620
1621         /* setup cursors */
1622         sm501_init_cursor(info->fb[HEAD_CRT], SM501_DC_CRT_HWC_ADDR);
1623         sm501_init_cursor(info->fb[HEAD_PANEL], SM501_DC_PANEL_HWC_ADDR);
1624
1625         return 0; /* everything is setup */
1626
1627  err_mem_res:
1628         release_mem_region(info->fbmem_res->start,
1629                            resource_size(info->fbmem_res));
1630
1631  err_regs2d_map:
1632         iounmap(info->regs2d);
1633
1634  err_regs2d_res:
1635         release_mem_region(info->regs2d_res->start,
1636                            resource_size(info->regs2d_res));
1637
1638  err_regs_map:
1639         iounmap(info->regs);
1640
1641  err_regs_res:
1642         release_mem_region(info->regs_res->start,
1643                            resource_size(info->regs_res));
1644
1645  err_release:
1646         return ret;
1647 }
1648
1649 static void sm501fb_stop(struct sm501fb_info *info)
1650 {
1651         /* disable display controller */
1652         sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0);
1653
1654         iounmap(info->fbmem);
1655         release_mem_region(info->fbmem_res->start,
1656                            resource_size(info->fbmem_res));
1657
1658         iounmap(info->regs2d);
1659         release_mem_region(info->regs2d_res->start,
1660                            resource_size(info->regs2d_res));
1661
1662         iounmap(info->regs);
1663         release_mem_region(info->regs_res->start,
1664                            resource_size(info->regs_res));
1665 }
1666
1667 static int sm501fb_init_fb(struct fb_info *fb,
1668                            enum sm501_controller head,
1669                            const char *fbname)
1670 {
1671         struct sm501_platdata_fbsub *pd;
1672         struct sm501fb_par *par = fb->par;
1673         struct sm501fb_info *info = par->info;
1674         unsigned long ctrl;
1675         unsigned int enable;
1676         int ret;
1677
1678         switch (head) {
1679         case HEAD_CRT:
1680                 pd = info->pdata->fb_crt;
1681                 ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
1682                 enable = (ctrl & SM501_DC_CRT_CONTROL_ENABLE) ? 1 : 0;
1683
1684                 /* ensure we set the correct source register */
1685                 if (info->pdata->fb_route != SM501_FB_CRT_PANEL) {
1686                         ctrl |= SM501_DC_CRT_CONTROL_SEL;
1687                         smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1688                 }
1689
1690                 break;
1691
1692         case HEAD_PANEL:
1693                 pd = info->pdata->fb_pnl;
1694                 ctrl = smc501_readl(info->regs + SM501_DC_PANEL_CONTROL);
1695                 enable = (ctrl & SM501_DC_PANEL_CONTROL_EN) ? 1 : 0;
1696                 break;
1697
1698         default:
1699                 pd = NULL;              /* stop compiler warnings */
1700                 ctrl = 0;
1701                 enable = 0;
1702                 BUG();
1703         }
1704
1705         dev_info(info->dev, "fb %s %sabled at start\n",
1706                  fbname, enable ? "en" : "dis");
1707
1708         /* check to see if our routing allows this */
1709
1710         if (head == HEAD_CRT && info->pdata->fb_route == SM501_FB_CRT_PANEL) {
1711                 ctrl &= ~SM501_DC_CRT_CONTROL_SEL;
1712                 smc501_writel(ctrl, info->regs + SM501_DC_CRT_CONTROL);
1713                 enable = 0;
1714         }
1715
1716         strlcpy(fb->fix.id, fbname, sizeof(fb->fix.id));
1717
1718         memcpy(&par->ops,
1719                (head == HEAD_CRT) ? &sm501fb_ops_crt : &sm501fb_ops_pnl,
1720                sizeof(struct fb_ops));
1721
1722         /* update ops dependent on what we've been passed */
1723
1724         if ((pd->flags & SM501FB_FLAG_USE_HWCURSOR) == 0)
1725                 par->ops.fb_cursor = NULL;
1726
1727         fb->fbops = &par->ops;
1728         fb->flags = FBINFO_FLAG_DEFAULT | FBINFO_READS_FAST |
1729                 FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
1730                 FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN;
1731
1732 #if defined(CONFIG_OF)
1733 #ifdef __BIG_ENDIAN
1734         if (of_get_property(info->dev->parent->of_node, "little-endian", NULL))
1735                 fb->flags |= FBINFO_FOREIGN_ENDIAN;
1736 #else
1737         if (of_get_property(info->dev->parent->of_node, "big-endian", NULL))
1738                 fb->flags |= FBINFO_FOREIGN_ENDIAN;
1739 #endif
1740 #endif
1741         /* fixed data */
1742
1743         fb->fix.type            = FB_TYPE_PACKED_PIXELS;
1744         fb->fix.type_aux        = 0;
1745         fb->fix.xpanstep        = 1;
1746         fb->fix.ypanstep        = 1;
1747         fb->fix.ywrapstep       = 0;
1748         fb->fix.accel           = FB_ACCEL_NONE;
1749
1750         /* screenmode */
1751
1752         fb->var.nonstd          = 0;
1753         fb->var.activate        = FB_ACTIVATE_NOW;
1754         fb->var.accel_flags     = 0;
1755         fb->var.vmode           = FB_VMODE_NONINTERLACED;
1756         fb->var.bits_per_pixel  = 16;
1757
1758         if (info->edid_data) {
1759                         /* Now build modedb from EDID */
1760                         fb_edid_to_monspecs(info->edid_data, &fb->monspecs);
1761                         fb_videomode_to_modelist(fb->monspecs.modedb,
1762                                                  fb->monspecs.modedb_len,
1763                                                  &fb->modelist);
1764         }
1765
1766         if (enable && (pd->flags & SM501FB_FLAG_USE_INIT_MODE) && 0) {
1767                 /* TODO read the mode from the current display */
1768         } else {
1769                 if (pd->def_mode) {
1770                         dev_info(info->dev, "using supplied mode\n");
1771                         fb_videomode_to_var(&fb->var, pd->def_mode);
1772
1773                         fb->var.bits_per_pixel = pd->def_bpp ? pd->def_bpp : 8;
1774                         fb->var.xres_virtual = fb->var.xres;
1775                         fb->var.yres_virtual = fb->var.yres;
1776                 } else {
1777                         if (info->edid_data) {
1778                                 ret = fb_find_mode(&fb->var, fb, fb_mode,
1779                                         fb->monspecs.modedb,
1780                                         fb->monspecs.modedb_len,
1781                                         &sm501_default_mode, default_bpp);
1782                                 /* edid_data is no longer needed, free it */
1783                                 kfree(info->edid_data);
1784                         } else {
1785                                 ret = fb_find_mode(&fb->var, fb,
1786                                            NULL, NULL, 0, NULL, 8);
1787                         }
1788
1789                         switch (ret) {
1790                         case 1:
1791                                 dev_info(info->dev, "using mode specified in "
1792                                                 "@mode\n");
1793                                 break;
1794                         case 2:
1795                                 dev_info(info->dev, "using mode specified in "
1796                                         "@mode with ignored refresh rate\n");
1797                                 break;
1798                         case 3:
1799                                 dev_info(info->dev, "using mode default "
1800                                         "mode\n");
1801                                 break;
1802                         case 4:
1803                                 dev_info(info->dev, "using mode from list\n");
1804                                 break;
1805                         default:
1806                                 dev_info(info->dev, "ret = %d\n", ret);
1807                                 dev_info(info->dev, "failed to find mode\n");
1808                                 return -EINVAL;
1809                         }
1810                 }
1811         }
1812
1813         /* initialise and set the palette */
1814         if (fb_alloc_cmap(&fb->cmap, NR_PALETTE, 0)) {
1815                 dev_err(info->dev, "failed to allocate cmap memory\n");
1816                 return -ENOMEM;
1817         }
1818         fb_set_cmap(&fb->cmap, fb);
1819
1820         ret = (fb->fbops->fb_check_var)(&fb->var, fb);
1821         if (ret)
1822                 dev_err(info->dev, "check_var() failed on initial setup?\n");
1823
1824         return 0;
1825 }
1826
1827 /* default platform data if none is supplied (ie, PCI device) */
1828
1829 static struct sm501_platdata_fbsub sm501fb_pdata_crt = {
1830         .flags          = (SM501FB_FLAG_USE_INIT_MODE |
1831                            SM501FB_FLAG_USE_HWCURSOR |
1832                            SM501FB_FLAG_USE_HWACCEL |
1833                            SM501FB_FLAG_DISABLE_AT_EXIT),
1834
1835 };
1836
1837 static struct sm501_platdata_fbsub sm501fb_pdata_pnl = {
1838         .flags          = (SM501FB_FLAG_USE_INIT_MODE |
1839                            SM501FB_FLAG_USE_HWCURSOR |
1840                            SM501FB_FLAG_USE_HWACCEL |
1841                            SM501FB_FLAG_DISABLE_AT_EXIT),
1842 };
1843
1844 static struct sm501_platdata_fb sm501fb_def_pdata = {
1845         .fb_route               = SM501_FB_OWN,
1846         .fb_crt                 = &sm501fb_pdata_crt,
1847         .fb_pnl                 = &sm501fb_pdata_pnl,
1848 };
1849
1850 static char driver_name_crt[] = "sm501fb-crt";
1851 static char driver_name_pnl[] = "sm501fb-panel";
1852
1853 static int __devinit sm501fb_probe_one(struct sm501fb_info *info,
1854                                        enum sm501_controller head)
1855 {
1856         unsigned char *name = (head == HEAD_CRT) ? "crt" : "panel";
1857         struct sm501_platdata_fbsub *pd;
1858         struct sm501fb_par *par;
1859         struct fb_info *fbi;
1860
1861         pd = (head == HEAD_CRT) ? info->pdata->fb_crt : info->pdata->fb_pnl;
1862
1863         /* Do not initialise if we've not been given any platform data */
1864         if (pd == NULL) {
1865                 dev_info(info->dev, "no data for fb %s (disabled)\n", name);
1866                 return 0;
1867         }
1868
1869         fbi = framebuffer_alloc(sizeof(struct sm501fb_par), info->dev);
1870         if (fbi == NULL) {
1871                 dev_err(info->dev, "cannot allocate %s framebuffer\n", name);
1872                 return -ENOMEM;
1873         }
1874
1875         par = fbi->par;
1876         par->info = info;
1877         par->head = head;
1878         fbi->pseudo_palette = &par->pseudo_palette;
1879
1880         info->fb[head] = fbi;
1881
1882         return 0;
1883 }
1884
1885 /* Free up anything allocated by sm501fb_init_fb */
1886
1887 static void sm501_free_init_fb(struct sm501fb_info *info,
1888                                 enum sm501_controller head)
1889 {
1890         struct fb_info *fbi = info->fb[head];
1891
1892         fb_dealloc_cmap(&fbi->cmap);
1893 }
1894
1895 static int __devinit sm501fb_start_one(struct sm501fb_info *info,
1896                                        enum sm501_controller head,
1897                                        const char *drvname)
1898 {
1899         struct fb_info *fbi = info->fb[head];
1900         int ret;
1901
1902         if (!fbi)
1903                 return 0;
1904
1905         mutex_init(&info->fb[head]->mm_lock);
1906
1907         ret = sm501fb_init_fb(info->fb[head], head, drvname);
1908         if (ret) {
1909                 dev_err(info->dev, "cannot initialise fb %s\n", drvname);
1910                 return ret;
1911         }
1912
1913         ret = register_framebuffer(info->fb[head]);
1914         if (ret) {
1915                 dev_err(info->dev, "failed to register fb %s\n", drvname);
1916                 sm501_free_init_fb(info, head);
1917                 return ret;
1918         }
1919
1920         dev_info(info->dev, "fb%d: %s frame buffer\n", fbi->node, fbi->fix.id);
1921
1922         return 0;
1923 }
1924
1925 static int __devinit sm501fb_probe(struct platform_device *pdev)
1926 {
1927         struct sm501fb_info *info;
1928         struct device *dev = &pdev->dev;
1929         int ret;
1930
1931         /* allocate our framebuffers */
1932
1933         info = kzalloc(sizeof(struct sm501fb_info), GFP_KERNEL);
1934         if (!info) {
1935                 dev_err(dev, "failed to allocate state\n");
1936                 return -ENOMEM;
1937         }
1938
1939         info->dev = dev = &pdev->dev;
1940         platform_set_drvdata(pdev, info);
1941
1942         if (dev->parent->platform_data) {
1943                 struct sm501_platdata *pd = dev->parent->platform_data;
1944                 info->pdata = pd->fb;
1945         }
1946
1947         if (info->pdata == NULL) {
1948                 int found = 0;
1949 #if defined(CONFIG_OF)
1950                 struct device_node *np = pdev->dev.parent->of_node;
1951                 const u8 *prop;
1952                 const char *cp;
1953                 int len;
1954
1955                 info->pdata = &sm501fb_def_pdata;
1956                 if (np) {
1957                         /* Get EDID */
1958                         cp = of_get_property(np, "mode", &len);
1959                         if (cp)
1960                                 strcpy(fb_mode, cp);
1961                         prop = of_get_property(np, "edid", &len);
1962                         if (prop && len == EDID_LENGTH) {
1963                                 info->edid_data = kmemdup(prop, EDID_LENGTH,
1964                                                           GFP_KERNEL);
1965                                 if (info->edid_data)
1966                                         found = 1;
1967                         }
1968                 }
1969 #endif
1970                 if (!found) {
1971                         dev_info(dev, "using default configuration data\n");
1972                         info->pdata = &sm501fb_def_pdata;
1973                 }
1974         }
1975
1976         /* probe for the presence of each panel */
1977
1978         ret = sm501fb_probe_one(info, HEAD_CRT);
1979         if (ret < 0) {
1980                 dev_err(dev, "failed to probe CRT\n");
1981                 goto err_alloc;
1982         }
1983
1984         ret = sm501fb_probe_one(info, HEAD_PANEL);
1985         if (ret < 0) {
1986                 dev_err(dev, "failed to probe PANEL\n");
1987                 goto err_probed_crt;
1988         }
1989
1990         if (info->fb[HEAD_PANEL] == NULL &&
1991             info->fb[HEAD_CRT] == NULL) {
1992                 dev_err(dev, "no framebuffers found\n");
1993                 goto err_alloc;
1994         }
1995
1996         /* get the resources for both of the framebuffers */
1997
1998         ret = sm501fb_start(info, pdev);
1999         if (ret) {
2000                 dev_err(dev, "cannot initialise SM501\n");
2001                 goto err_probed_panel;
2002         }
2003
2004         ret = sm501fb_start_one(info, HEAD_CRT, driver_name_crt);
2005         if (ret) {
2006                 dev_err(dev, "failed to start CRT\n");
2007                 goto err_started;
2008         }
2009
2010         ret = sm501fb_start_one(info, HEAD_PANEL, driver_name_pnl);
2011         if (ret) {
2012                 dev_err(dev, "failed to start Panel\n");
2013                 goto err_started_crt;
2014         }
2015
2016         /* create device files */
2017
2018         ret = device_create_file(dev, &dev_attr_crt_src);
2019         if (ret)
2020                 goto err_started_panel;
2021
2022         ret = device_create_file(dev, &dev_attr_fbregs_pnl);
2023         if (ret)
2024                 goto err_attached_crtsrc_file;
2025
2026         ret = device_create_file(dev, &dev_attr_fbregs_crt);
2027         if (ret)
2028                 goto err_attached_pnlregs_file;
2029
2030         /* we registered, return ok */
2031         return 0;
2032
2033 err_attached_pnlregs_file:
2034         device_remove_file(dev, &dev_attr_fbregs_pnl);
2035
2036 err_attached_crtsrc_file:
2037         device_remove_file(dev, &dev_attr_crt_src);
2038
2039 err_started_panel:
2040         unregister_framebuffer(info->fb[HEAD_PANEL]);
2041         sm501_free_init_fb(info, HEAD_PANEL);
2042
2043 err_started_crt:
2044         unregister_framebuffer(info->fb[HEAD_CRT]);
2045         sm501_free_init_fb(info, HEAD_CRT);
2046
2047 err_started:
2048         sm501fb_stop(info);
2049
2050 err_probed_panel:
2051         framebuffer_release(info->fb[HEAD_PANEL]);
2052
2053 err_probed_crt:
2054         framebuffer_release(info->fb[HEAD_CRT]);
2055
2056 err_alloc:
2057         kfree(info);
2058
2059         return ret;
2060 }
2061
2062
2063 /*
2064  *  Cleanup
2065  */
2066 static int sm501fb_remove(struct platform_device *pdev)
2067 {
2068         struct sm501fb_info *info = platform_get_drvdata(pdev);
2069         struct fb_info     *fbinfo_crt = info->fb[0];
2070         struct fb_info     *fbinfo_pnl = info->fb[1];
2071
2072         device_remove_file(&pdev->dev, &dev_attr_fbregs_crt);
2073         device_remove_file(&pdev->dev, &dev_attr_fbregs_pnl);
2074         device_remove_file(&pdev->dev, &dev_attr_crt_src);
2075
2076         sm501_free_init_fb(info, HEAD_CRT);
2077         sm501_free_init_fb(info, HEAD_PANEL);
2078
2079         unregister_framebuffer(fbinfo_crt);
2080         unregister_framebuffer(fbinfo_pnl);
2081
2082         sm501fb_stop(info);
2083         kfree(info);
2084
2085         framebuffer_release(fbinfo_pnl);
2086         framebuffer_release(fbinfo_crt);
2087
2088         return 0;
2089 }
2090
2091 #ifdef CONFIG_PM
2092
2093 static int sm501fb_suspend_fb(struct sm501fb_info *info,
2094                               enum sm501_controller head)
2095 {
2096         struct fb_info *fbi = info->fb[head];
2097         struct sm501fb_par *par = fbi->par;
2098
2099         if (par->screen.size == 0)
2100                 return 0;
2101
2102         /* blank the relevant interface to ensure unit power minimised */
2103         (par->ops.fb_blank)(FB_BLANK_POWERDOWN, fbi);
2104
2105         /* tell console/fb driver we are suspending */
2106
2107         console_lock();
2108         fb_set_suspend(fbi, 1);
2109         console_unlock();
2110
2111         /* backup copies in case chip is powered down over suspend */
2112
2113         par->store_fb = vmalloc(par->screen.size);
2114         if (par->store_fb == NULL) {
2115                 dev_err(info->dev, "no memory to store screen\n");
2116                 return -ENOMEM;
2117         }
2118
2119         par->store_cursor = vmalloc(par->cursor.size);
2120         if (par->store_cursor == NULL) {
2121                 dev_err(info->dev, "no memory to store cursor\n");
2122                 goto err_nocursor;
2123         }
2124
2125         dev_dbg(info->dev, "suspending screen to %p\n", par->store_fb);
2126         dev_dbg(info->dev, "suspending cursor to %p\n", par->store_cursor);
2127
2128         memcpy_fromio(par->store_fb, par->screen.k_addr, par->screen.size);
2129         memcpy_fromio(par->store_cursor, par->cursor.k_addr, par->cursor.size);
2130
2131         return 0;
2132
2133  err_nocursor:
2134         vfree(par->store_fb);
2135         par->store_fb = NULL;
2136
2137         return -ENOMEM;
2138 }
2139
2140 static void sm501fb_resume_fb(struct sm501fb_info *info,
2141                               enum sm501_controller head)
2142 {
2143         struct fb_info *fbi = info->fb[head];
2144         struct sm501fb_par *par = fbi->par;
2145
2146         if (par->screen.size == 0)
2147                 return;
2148
2149         /* re-activate the configuration */
2150
2151         (par->ops.fb_set_par)(fbi);
2152
2153         /* restore the data */
2154
2155         dev_dbg(info->dev, "restoring screen from %p\n", par->store_fb);
2156         dev_dbg(info->dev, "restoring cursor from %p\n", par->store_cursor);
2157
2158         if (par->store_fb)
2159                 memcpy_toio(par->screen.k_addr, par->store_fb,
2160                             par->screen.size);
2161
2162         if (par->store_cursor)
2163                 memcpy_toio(par->cursor.k_addr, par->store_cursor,
2164                             par->cursor.size);
2165
2166         console_lock();
2167         fb_set_suspend(fbi, 0);
2168         console_unlock();
2169
2170         vfree(par->store_fb);
2171         vfree(par->store_cursor);
2172 }
2173
2174
2175 /* suspend and resume support */
2176
2177 static int sm501fb_suspend(struct platform_device *pdev, pm_message_t state)
2178 {
2179         struct sm501fb_info *info = platform_get_drvdata(pdev);
2180
2181         /* store crt control to resume with */
2182         info->pm_crt_ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
2183
2184         sm501fb_suspend_fb(info, HEAD_CRT);
2185         sm501fb_suspend_fb(info, HEAD_PANEL);
2186
2187         /* turn off the clocks, in case the device is not powered down */
2188         sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 0);
2189
2190         return 0;
2191 }
2192
2193 #define SM501_CRT_CTRL_SAVE (SM501_DC_CRT_CONTROL_TVP |        \
2194                              SM501_DC_CRT_CONTROL_SEL)
2195
2196
2197 static int sm501fb_resume(struct platform_device *pdev)
2198 {
2199         struct sm501fb_info *info = platform_get_drvdata(pdev);
2200         unsigned long crt_ctrl;
2201
2202         sm501_unit_power(info->dev->parent, SM501_GATE_DISPLAY, 1);
2203
2204         /* restore the items we want to be saved for crt control */
2205
2206         crt_ctrl = smc501_readl(info->regs + SM501_DC_CRT_CONTROL);
2207         crt_ctrl &= ~SM501_CRT_CTRL_SAVE;
2208         crt_ctrl |= info->pm_crt_ctrl & SM501_CRT_CTRL_SAVE;
2209         smc501_writel(crt_ctrl, info->regs + SM501_DC_CRT_CONTROL);
2210
2211         sm501fb_resume_fb(info, HEAD_CRT);
2212         sm501fb_resume_fb(info, HEAD_PANEL);
2213
2214         return 0;
2215 }
2216
2217 #else
2218 #define sm501fb_suspend NULL
2219 #define sm501fb_resume  NULL
2220 #endif
2221
2222 static struct platform_driver sm501fb_driver = {
2223         .probe          = sm501fb_probe,
2224         .remove         = sm501fb_remove,
2225         .suspend        = sm501fb_suspend,
2226         .resume         = sm501fb_resume,
2227         .driver         = {
2228                 .name   = "sm501-fb",
2229                 .owner  = THIS_MODULE,
2230         },
2231 };
2232
2233 static int __devinit sm501fb_init(void)
2234 {
2235         return platform_driver_register(&sm501fb_driver);
2236 }
2237
2238 static void __exit sm501fb_cleanup(void)
2239 {
2240         platform_driver_unregister(&sm501fb_driver);
2241 }
2242
2243 module_init(sm501fb_init);
2244 module_exit(sm501fb_cleanup);
2245
2246 module_param_named(mode, fb_mode, charp, 0);
2247 MODULE_PARM_DESC(mode,
2248         "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
2249 module_param_named(bpp, default_bpp, ulong, 0);
2250 MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified mode");
2251 MODULE_AUTHOR("Ben Dooks, Vincent Sanders");
2252 MODULE_DESCRIPTION("SM501 Framebuffer driver");
2253 MODULE_LICENSE("GPL v2");