i2c: tegra: Add stub runtime power management
[linux-2.6.git] / drivers / video / pxafb.c
1 /*
2  *  linux/drivers/video/pxafb.c
3  *
4  *  Copyright (C) 1999 Eric A. Thomas.
5  *  Copyright (C) 2004 Jean-Frederic Clere.
6  *  Copyright (C) 2004 Ian Campbell.
7  *  Copyright (C) 2004 Jeff Lackey.
8  *   Based on sa1100fb.c Copyright (C) 1999 Eric A. Thomas
9  *  which in turn is
10  *   Based on acornfb.c Copyright (C) Russell King.
11  *
12  * This file is subject to the terms and conditions of the GNU General Public
13  * License.  See the file COPYING in the main directory of this archive for
14  * more details.
15  *
16  *              Intel PXA250/210 LCD Controller Frame Buffer Driver
17  *
18  * Please direct your questions and comments on this driver to the following
19  * email address:
20  *
21  *      linux-arm-kernel@lists.arm.linux.org.uk
22  *
23  * Add support for overlay1 and overlay2 based on pxafb_overlay.c:
24  *
25  *   Copyright (C) 2004, Intel Corporation
26  *
27  *     2003/08/27: <yu.tang@intel.com>
28  *     2004/03/10: <stanley.cai@intel.com>
29  *     2004/10/28: <yan.yin@intel.com>
30  *
31  *   Copyright (C) 2006-2008 Marvell International Ltd.
32  *   All Rights Reserved
33  */
34
35 #include <linux/module.h>
36 #include <linux/moduleparam.h>
37 #include <linux/kernel.h>
38 #include <linux/sched.h>
39 #include <linux/errno.h>
40 #include <linux/string.h>
41 #include <linux/interrupt.h>
42 #include <linux/slab.h>
43 #include <linux/mm.h>
44 #include <linux/fb.h>
45 #include <linux/delay.h>
46 #include <linux/init.h>
47 #include <linux/ioport.h>
48 #include <linux/cpufreq.h>
49 #include <linux/platform_device.h>
50 #include <linux/dma-mapping.h>
51 #include <linux/clk.h>
52 #include <linux/err.h>
53 #include <linux/completion.h>
54 #include <linux/mutex.h>
55 #include <linux/kthread.h>
56 #include <linux/freezer.h>
57
58 #include <mach/hardware.h>
59 #include <asm/io.h>
60 #include <asm/irq.h>
61 #include <asm/div64.h>
62 #include <mach/bitfield.h>
63 #include <mach/pxafb.h>
64
65 /*
66  * Complain if VAR is out of range.
67  */
68 #define DEBUG_VAR 1
69
70 #include "pxafb.h"
71
72 /* Bits which should not be set in machine configuration structures */
73 #define LCCR0_INVALID_CONFIG_MASK       (LCCR0_OUM | LCCR0_BM | LCCR0_QDM |\
74                                          LCCR0_DIS | LCCR0_EFM | LCCR0_IUM |\
75                                          LCCR0_SFM | LCCR0_LDM | LCCR0_ENB)
76
77 #define LCCR3_INVALID_CONFIG_MASK       (LCCR3_HSP | LCCR3_VSP |\
78                                          LCCR3_PCD | LCCR3_BPP(0xf))
79
80 static int pxafb_activate_var(struct fb_var_screeninfo *var,
81                                 struct pxafb_info *);
82 static void set_ctrlr_state(struct pxafb_info *fbi, u_int state);
83 static void setup_base_frame(struct pxafb_info *fbi,
84                              struct fb_var_screeninfo *var, int branch);
85 static int setup_frame_dma(struct pxafb_info *fbi, int dma, int pal,
86                            unsigned long offset, size_t size);
87
88 static unsigned long video_mem_size = 0;
89
90 static inline unsigned long
91 lcd_readl(struct pxafb_info *fbi, unsigned int off)
92 {
93         return __raw_readl(fbi->mmio_base + off);
94 }
95
96 static inline void
97 lcd_writel(struct pxafb_info *fbi, unsigned int off, unsigned long val)
98 {
99         __raw_writel(val, fbi->mmio_base + off);
100 }
101
102 static inline void pxafb_schedule_work(struct pxafb_info *fbi, u_int state)
103 {
104         unsigned long flags;
105
106         local_irq_save(flags);
107         /*
108          * We need to handle two requests being made at the same time.
109          * There are two important cases:
110          *  1. When we are changing VT (C_REENABLE) while unblanking
111          *     (C_ENABLE) We must perform the unblanking, which will
112          *     do our REENABLE for us.
113          *  2. When we are blanking, but immediately unblank before
114          *     we have blanked.  We do the "REENABLE" thing here as
115          *     well, just to be sure.
116          */
117         if (fbi->task_state == C_ENABLE && state == C_REENABLE)
118                 state = (u_int) -1;
119         if (fbi->task_state == C_DISABLE && state == C_ENABLE)
120                 state = C_REENABLE;
121
122         if (state != (u_int)-1) {
123                 fbi->task_state = state;
124                 schedule_work(&fbi->task);
125         }
126         local_irq_restore(flags);
127 }
128
129 static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
130 {
131         chan &= 0xffff;
132         chan >>= 16 - bf->length;
133         return chan << bf->offset;
134 }
135
136 static int
137 pxafb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
138                        u_int trans, struct fb_info *info)
139 {
140         struct pxafb_info *fbi = (struct pxafb_info *)info;
141         u_int val;
142
143         if (regno >= fbi->palette_size)
144                 return 1;
145
146         if (fbi->fb.var.grayscale) {
147                 fbi->palette_cpu[regno] = ((blue >> 8) & 0x00ff);
148                 return 0;
149         }
150
151         switch (fbi->lccr4 & LCCR4_PAL_FOR_MASK) {
152         case LCCR4_PAL_FOR_0:
153                 val  = ((red   >>  0) & 0xf800);
154                 val |= ((green >>  5) & 0x07e0);
155                 val |= ((blue  >> 11) & 0x001f);
156                 fbi->palette_cpu[regno] = val;
157                 break;
158         case LCCR4_PAL_FOR_1:
159                 val  = ((red   << 8) & 0x00f80000);
160                 val |= ((green >> 0) & 0x0000fc00);
161                 val |= ((blue  >> 8) & 0x000000f8);
162                 ((u32 *)(fbi->palette_cpu))[regno] = val;
163                 break;
164         case LCCR4_PAL_FOR_2:
165                 val  = ((red   << 8) & 0x00fc0000);
166                 val |= ((green >> 0) & 0x0000fc00);
167                 val |= ((blue  >> 8) & 0x000000fc);
168                 ((u32 *)(fbi->palette_cpu))[regno] = val;
169                 break;
170         case LCCR4_PAL_FOR_3:
171                 val  = ((red   << 8) & 0x00ff0000);
172                 val |= ((green >> 0) & 0x0000ff00);
173                 val |= ((blue  >> 8) & 0x000000ff);
174                 ((u32 *)(fbi->palette_cpu))[regno] = val;
175                 break;
176         }
177
178         return 0;
179 }
180
181 static int
182 pxafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
183                    u_int trans, struct fb_info *info)
184 {
185         struct pxafb_info *fbi = (struct pxafb_info *)info;
186         unsigned int val;
187         int ret = 1;
188
189         /*
190          * If inverse mode was selected, invert all the colours
191          * rather than the register number.  The register number
192          * is what you poke into the framebuffer to produce the
193          * colour you requested.
194          */
195         if (fbi->cmap_inverse) {
196                 red   = 0xffff - red;
197                 green = 0xffff - green;
198                 blue  = 0xffff - blue;
199         }
200
201         /*
202          * If greyscale is true, then we convert the RGB value
203          * to greyscale no matter what visual we are using.
204          */
205         if (fbi->fb.var.grayscale)
206                 red = green = blue = (19595 * red + 38470 * green +
207                                         7471 * blue) >> 16;
208
209         switch (fbi->fb.fix.visual) {
210         case FB_VISUAL_TRUECOLOR:
211                 /*
212                  * 16-bit True Colour.  We encode the RGB value
213                  * according to the RGB bitfield information.
214                  */
215                 if (regno < 16) {
216                         u32 *pal = fbi->fb.pseudo_palette;
217
218                         val  = chan_to_field(red, &fbi->fb.var.red);
219                         val |= chan_to_field(green, &fbi->fb.var.green);
220                         val |= chan_to_field(blue, &fbi->fb.var.blue);
221
222                         pal[regno] = val;
223                         ret = 0;
224                 }
225                 break;
226
227         case FB_VISUAL_STATIC_PSEUDOCOLOR:
228         case FB_VISUAL_PSEUDOCOLOR:
229                 ret = pxafb_setpalettereg(regno, red, green, blue, trans, info);
230                 break;
231         }
232
233         return ret;
234 }
235
236 /* calculate pixel depth, transparency bit included, >=16bpp formats _only_ */
237 static inline int var_to_depth(struct fb_var_screeninfo *var)
238 {
239         return var->red.length + var->green.length +
240                 var->blue.length + var->transp.length;
241 }
242
243 /* calculate 4-bit BPP value for LCCR3 and OVLxC1 */
244 static int pxafb_var_to_bpp(struct fb_var_screeninfo *var)
245 {
246         int bpp = -EINVAL;
247
248         switch (var->bits_per_pixel) {
249         case 1:  bpp = 0; break;
250         case 2:  bpp = 1; break;
251         case 4:  bpp = 2; break;
252         case 8:  bpp = 3; break;
253         case 16: bpp = 4; break;
254         case 24:
255                 switch (var_to_depth(var)) {
256                 case 18: bpp = 6; break; /* 18-bits/pixel packed */
257                 case 19: bpp = 8; break; /* 19-bits/pixel packed */
258                 case 24: bpp = 9; break;
259                 }
260                 break;
261         case 32:
262                 switch (var_to_depth(var)) {
263                 case 18: bpp = 5; break; /* 18-bits/pixel unpacked */
264                 case 19: bpp = 7; break; /* 19-bits/pixel unpacked */
265                 case 25: bpp = 10; break;
266                 }
267                 break;
268         }
269         return bpp;
270 }
271
272 /*
273  *  pxafb_var_to_lccr3():
274  *    Convert a bits per pixel value to the correct bit pattern for LCCR3
275  *
276  *  NOTE: for PXA27x with overlays support, the LCCR3_PDFOR_x bits have an
277  *  implication of the acutal use of transparency bit,  which we handle it
278  *  here separatedly. See PXA27x Developer's Manual, Section <<7.4.6 Pixel
279  *  Formats>> for the valid combination of PDFOR, PAL_FOR for various BPP.
280  *
281  *  Transparency for palette pixel formats is not supported at the moment.
282  */
283 static uint32_t pxafb_var_to_lccr3(struct fb_var_screeninfo *var)
284 {
285         int bpp = pxafb_var_to_bpp(var);
286         uint32_t lccr3;
287
288         if (bpp < 0)
289                 return 0;
290
291         lccr3 = LCCR3_BPP(bpp);
292
293         switch (var_to_depth(var)) {
294         case 16: lccr3 |= var->transp.length ? LCCR3_PDFOR_3 : 0; break;
295         case 18: lccr3 |= LCCR3_PDFOR_3; break;
296         case 24: lccr3 |= var->transp.length ? LCCR3_PDFOR_2 : LCCR3_PDFOR_3;
297                  break;
298         case 19:
299         case 25: lccr3 |= LCCR3_PDFOR_0; break;
300         }
301         return lccr3;
302 }
303
304 #define SET_PIXFMT(v, r, g, b, t)                               \
305 ({                                                              \
306         (v)->transp.offset = (t) ? (r) + (g) + (b) : 0;         \
307         (v)->transp.length = (t) ? (t) : 0;                     \
308         (v)->blue.length   = (b); (v)->blue.offset = 0;         \
309         (v)->green.length  = (g); (v)->green.offset = (b);      \
310         (v)->red.length    = (r); (v)->red.offset = (b) + (g);  \
311 })
312
313 /* set the RGBT bitfields of fb_var_screeninf according to
314  * var->bits_per_pixel and given depth
315  */
316 static void pxafb_set_pixfmt(struct fb_var_screeninfo *var, int depth)
317 {
318         if (depth == 0)
319                 depth = var->bits_per_pixel;
320
321         if (var->bits_per_pixel < 16) {
322                 /* indexed pixel formats */
323                 var->red.offset    = 0; var->red.length    = 8;
324                 var->green.offset  = 0; var->green.length  = 8;
325                 var->blue.offset   = 0; var->blue.length   = 8;
326                 var->transp.offset = 0; var->transp.length = 8;
327         }
328
329         switch (depth) {
330         case 16: var->transp.length ?
331                  SET_PIXFMT(var, 5, 5, 5, 1) :          /* RGBT555 */
332                  SET_PIXFMT(var, 5, 6, 5, 0); break;    /* RGB565 */
333         case 18: SET_PIXFMT(var, 6, 6, 6, 0); break;    /* RGB666 */
334         case 19: SET_PIXFMT(var, 6, 6, 6, 1); break;    /* RGBT666 */
335         case 24: var->transp.length ?
336                  SET_PIXFMT(var, 8, 8, 7, 1) :          /* RGBT887 */
337                  SET_PIXFMT(var, 8, 8, 8, 0); break;    /* RGB888 */
338         case 25: SET_PIXFMT(var, 8, 8, 8, 1); break;    /* RGBT888 */
339         }
340 }
341
342 #ifdef CONFIG_CPU_FREQ
343 /*
344  *  pxafb_display_dma_period()
345  *    Calculate the minimum period (in picoseconds) between two DMA
346  *    requests for the LCD controller.  If we hit this, it means we're
347  *    doing nothing but LCD DMA.
348  */
349 static unsigned int pxafb_display_dma_period(struct fb_var_screeninfo *var)
350 {
351         /*
352          * Period = pixclock * bits_per_byte * bytes_per_transfer
353          *              / memory_bits_per_pixel;
354          */
355         return var->pixclock * 8 * 16 / var->bits_per_pixel;
356 }
357 #endif
358
359 /*
360  * Select the smallest mode that allows the desired resolution to be
361  * displayed. If desired parameters can be rounded up.
362  */
363 static struct pxafb_mode_info *pxafb_getmode(struct pxafb_mach_info *mach,
364                                              struct fb_var_screeninfo *var)
365 {
366         struct pxafb_mode_info *mode = NULL;
367         struct pxafb_mode_info *modelist = mach->modes;
368         unsigned int best_x = 0xffffffff, best_y = 0xffffffff;
369         unsigned int i;
370
371         for (i = 0; i < mach->num_modes; i++) {
372                 if (modelist[i].xres >= var->xres &&
373                     modelist[i].yres >= var->yres &&
374                     modelist[i].xres < best_x &&
375                     modelist[i].yres < best_y &&
376                     modelist[i].bpp >= var->bits_per_pixel) {
377                         best_x = modelist[i].xres;
378                         best_y = modelist[i].yres;
379                         mode = &modelist[i];
380                 }
381         }
382
383         return mode;
384 }
385
386 static void pxafb_setmode(struct fb_var_screeninfo *var,
387                           struct pxafb_mode_info *mode)
388 {
389         var->xres               = mode->xres;
390         var->yres               = mode->yres;
391         var->bits_per_pixel     = mode->bpp;
392         var->pixclock           = mode->pixclock;
393         var->hsync_len          = mode->hsync_len;
394         var->left_margin        = mode->left_margin;
395         var->right_margin       = mode->right_margin;
396         var->vsync_len          = mode->vsync_len;
397         var->upper_margin       = mode->upper_margin;
398         var->lower_margin       = mode->lower_margin;
399         var->sync               = mode->sync;
400         var->grayscale          = mode->cmap_greyscale;
401         var->transp.length      = mode->transparency;
402
403         /* set the initial RGBA bitfields */
404         pxafb_set_pixfmt(var, mode->depth);
405 }
406
407 static int pxafb_adjust_timing(struct pxafb_info *fbi,
408                                struct fb_var_screeninfo *var)
409 {
410         int line_length;
411
412         var->xres = max_t(int, var->xres, MIN_XRES);
413         var->yres = max_t(int, var->yres, MIN_YRES);
414
415         if (!(fbi->lccr0 & LCCR0_LCDT)) {
416                 clamp_val(var->hsync_len, 1, 64);
417                 clamp_val(var->vsync_len, 1, 64);
418                 clamp_val(var->left_margin,  1, 255);
419                 clamp_val(var->right_margin, 1, 255);
420                 clamp_val(var->upper_margin, 1, 255);
421                 clamp_val(var->lower_margin, 1, 255);
422         }
423
424         /* make sure each line is aligned on word boundary */
425         line_length = var->xres * var->bits_per_pixel / 8;
426         line_length = ALIGN(line_length, 4);
427         var->xres = line_length * 8 / var->bits_per_pixel;
428
429         /* we don't support xpan, force xres_virtual to be equal to xres */
430         var->xres_virtual = var->xres;
431
432         if (var->accel_flags & FB_ACCELF_TEXT)
433                 var->yres_virtual = fbi->fb.fix.smem_len / line_length;
434         else
435                 var->yres_virtual = max(var->yres_virtual, var->yres);
436
437         /* check for limits */
438         if (var->xres > MAX_XRES || var->yres > MAX_YRES)
439                 return -EINVAL;
440
441         if (var->yres > var->yres_virtual)
442                 return -EINVAL;
443
444         return 0;
445 }
446
447 /*
448  *  pxafb_check_var():
449  *    Get the video params out of 'var'. If a value doesn't fit, round it up,
450  *    if it's too big, return -EINVAL.
451  *
452  *    Round up in the following order: bits_per_pixel, xres,
453  *    yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
454  *    bitfields, horizontal timing, vertical timing.
455  */
456 static int pxafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
457 {
458         struct pxafb_info *fbi = (struct pxafb_info *)info;
459         struct pxafb_mach_info *inf = fbi->dev->platform_data;
460         int err;
461
462         if (inf->fixed_modes) {
463                 struct pxafb_mode_info *mode;
464
465                 mode = pxafb_getmode(inf, var);
466                 if (!mode)
467                         return -EINVAL;
468                 pxafb_setmode(var, mode);
469         }
470
471         /* do a test conversion to BPP fields to check the color formats */
472         err = pxafb_var_to_bpp(var);
473         if (err < 0)
474                 return err;
475
476         pxafb_set_pixfmt(var, var_to_depth(var));
477
478         err = pxafb_adjust_timing(fbi, var);
479         if (err)
480                 return err;
481
482 #ifdef CONFIG_CPU_FREQ
483         pr_debug("pxafb: dma period = %d ps\n",
484                  pxafb_display_dma_period(var));
485 #endif
486
487         return 0;
488 }
489
490 /*
491  * pxafb_set_par():
492  *      Set the user defined part of the display for the specified console
493  */
494 static int pxafb_set_par(struct fb_info *info)
495 {
496         struct pxafb_info *fbi = (struct pxafb_info *)info;
497         struct fb_var_screeninfo *var = &info->var;
498
499         if (var->bits_per_pixel >= 16)
500                 fbi->fb.fix.visual = FB_VISUAL_TRUECOLOR;
501         else if (!fbi->cmap_static)
502                 fbi->fb.fix.visual = FB_VISUAL_PSEUDOCOLOR;
503         else {
504                 /*
505                  * Some people have weird ideas about wanting static
506                  * pseudocolor maps.  I suspect their user space
507                  * applications are broken.
508                  */
509                 fbi->fb.fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
510         }
511
512         fbi->fb.fix.line_length = var->xres_virtual *
513                                   var->bits_per_pixel / 8;
514         if (var->bits_per_pixel >= 16)
515                 fbi->palette_size = 0;
516         else
517                 fbi->palette_size = var->bits_per_pixel == 1 ?
518                                         4 : 1 << var->bits_per_pixel;
519
520         fbi->palette_cpu = (u16 *)&fbi->dma_buff->palette[0];
521
522         if (fbi->fb.var.bits_per_pixel >= 16)
523                 fb_dealloc_cmap(&fbi->fb.cmap);
524         else
525                 fb_alloc_cmap(&fbi->fb.cmap, 1<<fbi->fb.var.bits_per_pixel, 0);
526
527         pxafb_activate_var(var, fbi);
528
529         return 0;
530 }
531
532 static int pxafb_pan_display(struct fb_var_screeninfo *var,
533                              struct fb_info *info)
534 {
535         struct pxafb_info *fbi = (struct pxafb_info *)info;
536         struct fb_var_screeninfo newvar;
537         int dma = DMA_MAX + DMA_BASE;
538
539         if (fbi->state != C_ENABLE)
540                 return 0;
541
542         /* Only take .xoffset, .yoffset and .vmode & FB_VMODE_YWRAP from what
543          * was passed in and copy the rest from the old screeninfo.
544          */
545         memcpy(&newvar, &fbi->fb.var, sizeof(newvar));
546         newvar.xoffset = var->xoffset;
547         newvar.yoffset = var->yoffset;
548         newvar.vmode &= ~FB_VMODE_YWRAP;
549         newvar.vmode |= var->vmode & FB_VMODE_YWRAP;
550
551         setup_base_frame(fbi, &newvar, 1);
552
553         if (fbi->lccr0 & LCCR0_SDS)
554                 lcd_writel(fbi, FBR1, fbi->fdadr[dma + 1] | 0x1);
555
556         lcd_writel(fbi, FBR0, fbi->fdadr[dma] | 0x1);
557         return 0;
558 }
559
560 /*
561  * pxafb_blank():
562  *      Blank the display by setting all palette values to zero.  Note, the
563  *      16 bpp mode does not really use the palette, so this will not
564  *      blank the display in all modes.
565  */
566 static int pxafb_blank(int blank, struct fb_info *info)
567 {
568         struct pxafb_info *fbi = (struct pxafb_info *)info;
569         int i;
570
571         switch (blank) {
572         case FB_BLANK_POWERDOWN:
573         case FB_BLANK_VSYNC_SUSPEND:
574         case FB_BLANK_HSYNC_SUSPEND:
575         case FB_BLANK_NORMAL:
576                 if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
577                     fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
578                         for (i = 0; i < fbi->palette_size; i++)
579                                 pxafb_setpalettereg(i, 0, 0, 0, 0, info);
580
581                 pxafb_schedule_work(fbi, C_DISABLE);
582                 /* TODO if (pxafb_blank_helper) pxafb_blank_helper(blank); */
583                 break;
584
585         case FB_BLANK_UNBLANK:
586                 /* TODO if (pxafb_blank_helper) pxafb_blank_helper(blank); */
587                 if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR ||
588                     fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
589                         fb_set_cmap(&fbi->fb.cmap, info);
590                 pxafb_schedule_work(fbi, C_ENABLE);
591         }
592         return 0;
593 }
594
595 static struct fb_ops pxafb_ops = {
596         .owner          = THIS_MODULE,
597         .fb_check_var   = pxafb_check_var,
598         .fb_set_par     = pxafb_set_par,
599         .fb_pan_display = pxafb_pan_display,
600         .fb_setcolreg   = pxafb_setcolreg,
601         .fb_fillrect    = cfb_fillrect,
602         .fb_copyarea    = cfb_copyarea,
603         .fb_imageblit   = cfb_imageblit,
604         .fb_blank       = pxafb_blank,
605 };
606
607 #ifdef CONFIG_FB_PXA_OVERLAY
608 static void overlay1fb_setup(struct pxafb_layer *ofb)
609 {
610         int size = ofb->fb.fix.line_length * ofb->fb.var.yres_virtual;
611         unsigned long start = ofb->video_mem_phys;
612         setup_frame_dma(ofb->fbi, DMA_OV1, PAL_NONE, start, size);
613 }
614
615 /* Depending on the enable status of overlay1/2, the DMA should be
616  * updated from FDADRx (when disabled) or FBRx (when enabled).
617  */
618 static void overlay1fb_enable(struct pxafb_layer *ofb)
619 {
620         int enabled = lcd_readl(ofb->fbi, OVL1C1) & OVLxC1_OEN;
621         uint32_t fdadr1 = ofb->fbi->fdadr[DMA_OV1] | (enabled ? 0x1 : 0);
622
623         lcd_writel(ofb->fbi, enabled ? FBR1 : FDADR1, fdadr1);
624         lcd_writel(ofb->fbi, OVL1C2, ofb->control[1]);
625         lcd_writel(ofb->fbi, OVL1C1, ofb->control[0] | OVLxC1_OEN);
626 }
627
628 static void overlay1fb_disable(struct pxafb_layer *ofb)
629 {
630         uint32_t lccr5;
631
632         if (!(lcd_readl(ofb->fbi, OVL1C1) & OVLxC1_OEN))
633                 return;
634
635         lccr5 = lcd_readl(ofb->fbi, LCCR5);
636
637         lcd_writel(ofb->fbi, OVL1C1, ofb->control[0] & ~OVLxC1_OEN);
638
639         lcd_writel(ofb->fbi, LCSR1, LCSR1_BS(1));
640         lcd_writel(ofb->fbi, LCCR5, lccr5 & ~LCSR1_BS(1));
641         lcd_writel(ofb->fbi, FBR1, ofb->fbi->fdadr[DMA_OV1] | 0x3);
642
643         if (wait_for_completion_timeout(&ofb->branch_done, 1 * HZ) == 0)
644                 pr_warning("%s: timeout disabling overlay1\n", __func__);
645
646         lcd_writel(ofb->fbi, LCCR5, lccr5);
647 }
648
649 static void overlay2fb_setup(struct pxafb_layer *ofb)
650 {
651         int size, div = 1, pfor = NONSTD_TO_PFOR(ofb->fb.var.nonstd);
652         unsigned long start[3] = { ofb->video_mem_phys, 0, 0 };
653
654         if (pfor == OVERLAY_FORMAT_RGB || pfor == OVERLAY_FORMAT_YUV444_PACKED) {
655                 size = ofb->fb.fix.line_length * ofb->fb.var.yres_virtual;
656                 setup_frame_dma(ofb->fbi, DMA_OV2_Y, -1, start[0], size);
657         } else {
658                 size = ofb->fb.var.xres_virtual * ofb->fb.var.yres_virtual;
659                 switch (pfor) {
660                 case OVERLAY_FORMAT_YUV444_PLANAR: div = 1; break;
661                 case OVERLAY_FORMAT_YUV422_PLANAR: div = 2; break;
662                 case OVERLAY_FORMAT_YUV420_PLANAR: div = 4; break;
663                 }
664                 start[1] = start[0] + size;
665                 start[2] = start[1] + size / div;
666                 setup_frame_dma(ofb->fbi, DMA_OV2_Y,  -1, start[0], size);
667                 setup_frame_dma(ofb->fbi, DMA_OV2_Cb, -1, start[1], size / div);
668                 setup_frame_dma(ofb->fbi, DMA_OV2_Cr, -1, start[2], size / div);
669         }
670 }
671
672 static void overlay2fb_enable(struct pxafb_layer *ofb)
673 {
674         int pfor = NONSTD_TO_PFOR(ofb->fb.var.nonstd);
675         int enabled = lcd_readl(ofb->fbi, OVL2C1) & OVLxC1_OEN;
676         uint32_t fdadr2 = ofb->fbi->fdadr[DMA_OV2_Y]  | (enabled ? 0x1 : 0);
677         uint32_t fdadr3 = ofb->fbi->fdadr[DMA_OV2_Cb] | (enabled ? 0x1 : 0);
678         uint32_t fdadr4 = ofb->fbi->fdadr[DMA_OV2_Cr] | (enabled ? 0x1 : 0);
679
680         if (pfor == OVERLAY_FORMAT_RGB || pfor == OVERLAY_FORMAT_YUV444_PACKED)
681                 lcd_writel(ofb->fbi, enabled ? FBR2 : FDADR2, fdadr2);
682         else {
683                 lcd_writel(ofb->fbi, enabled ? FBR2 : FDADR2, fdadr2);
684                 lcd_writel(ofb->fbi, enabled ? FBR3 : FDADR3, fdadr3);
685                 lcd_writel(ofb->fbi, enabled ? FBR4 : FDADR4, fdadr4);
686         }
687         lcd_writel(ofb->fbi, OVL2C2, ofb->control[1]);
688         lcd_writel(ofb->fbi, OVL2C1, ofb->control[0] | OVLxC1_OEN);
689 }
690
691 static void overlay2fb_disable(struct pxafb_layer *ofb)
692 {
693         uint32_t lccr5;
694
695         if (!(lcd_readl(ofb->fbi, OVL2C1) & OVLxC1_OEN))
696                 return;
697
698         lccr5 = lcd_readl(ofb->fbi, LCCR5);
699
700         lcd_writel(ofb->fbi, OVL2C1, ofb->control[0] & ~OVLxC1_OEN);
701
702         lcd_writel(ofb->fbi, LCSR1, LCSR1_BS(2));
703         lcd_writel(ofb->fbi, LCCR5, lccr5 & ~LCSR1_BS(2));
704         lcd_writel(ofb->fbi, FBR2, ofb->fbi->fdadr[DMA_OV2_Y]  | 0x3);
705         lcd_writel(ofb->fbi, FBR3, ofb->fbi->fdadr[DMA_OV2_Cb] | 0x3);
706         lcd_writel(ofb->fbi, FBR4, ofb->fbi->fdadr[DMA_OV2_Cr] | 0x3);
707
708         if (wait_for_completion_timeout(&ofb->branch_done, 1 * HZ) == 0)
709                 pr_warning("%s: timeout disabling overlay2\n", __func__);
710 }
711
712 static struct pxafb_layer_ops ofb_ops[] = {
713         [0] = {
714                 .enable         = overlay1fb_enable,
715                 .disable        = overlay1fb_disable,
716                 .setup          = overlay1fb_setup,
717         },
718         [1] = {
719                 .enable         = overlay2fb_enable,
720                 .disable        = overlay2fb_disable,
721                 .setup          = overlay2fb_setup,
722         },
723 };
724
725 static int overlayfb_open(struct fb_info *info, int user)
726 {
727         struct pxafb_layer *ofb = (struct pxafb_layer *)info;
728
729         /* no support for framebuffer console on overlay */
730         if (user == 0)
731                 return -ENODEV;
732
733         if (ofb->usage++ == 0)
734                 /* unblank the base framebuffer */
735                 fb_blank(&ofb->fbi->fb, FB_BLANK_UNBLANK);
736
737         return 0;
738 }
739
740 static int overlayfb_release(struct fb_info *info, int user)
741 {
742         struct pxafb_layer *ofb = (struct pxafb_layer*) info;
743
744         if (ofb->usage == 1) {
745                 ofb->ops->disable(ofb);
746                 ofb->fb.var.height      = -1;
747                 ofb->fb.var.width       = -1;
748                 ofb->fb.var.xres = ofb->fb.var.xres_virtual = 0;
749                 ofb->fb.var.yres = ofb->fb.var.yres_virtual = 0;
750
751                 ofb->usage--;
752         }
753         return 0;
754 }
755
756 static int overlayfb_check_var(struct fb_var_screeninfo *var,
757                                struct fb_info *info)
758 {
759         struct pxafb_layer *ofb = (struct pxafb_layer *)info;
760         struct fb_var_screeninfo *base_var = &ofb->fbi->fb.var;
761         int xpos, ypos, pfor, bpp;
762
763         xpos = NONSTD_TO_XPOS(var->nonstd);
764         ypos = NONSTD_TO_YPOS(var->nonstd);
765         pfor = NONSTD_TO_PFOR(var->nonstd);
766
767         bpp = pxafb_var_to_bpp(var);
768         if (bpp < 0)
769                 return -EINVAL;
770
771         /* no support for YUV format on overlay1 */
772         if (ofb->id == OVERLAY1 && pfor != 0)
773                 return -EINVAL;
774
775         /* for YUV packed formats, bpp = 'minimum bpp of YUV components' */
776         switch (pfor) {
777         case OVERLAY_FORMAT_RGB:
778                 bpp = pxafb_var_to_bpp(var);
779                 if (bpp < 0)
780                         return -EINVAL;
781
782                 pxafb_set_pixfmt(var, var_to_depth(var));
783                 break;
784         case OVERLAY_FORMAT_YUV444_PACKED: bpp = 24; break;
785         case OVERLAY_FORMAT_YUV444_PLANAR: bpp = 8; break;
786         case OVERLAY_FORMAT_YUV422_PLANAR: bpp = 4; break;
787         case OVERLAY_FORMAT_YUV420_PLANAR: bpp = 2; break;
788         default:
789                 return -EINVAL;
790         }
791
792         /* each line must start at a 32-bit word boundary */
793         if ((xpos * bpp) % 32)
794                 return -EINVAL;
795
796         /* xres must align on 32-bit word boundary */
797         var->xres = roundup(var->xres * bpp, 32) / bpp;
798
799         if ((xpos + var->xres > base_var->xres) ||
800             (ypos + var->yres > base_var->yres))
801                 return -EINVAL;
802
803         var->xres_virtual = var->xres;
804         var->yres_virtual = max(var->yres, var->yres_virtual);
805         return 0;
806 }
807
808 static int overlayfb_check_video_memory(struct pxafb_layer *ofb)
809 {
810         struct fb_var_screeninfo *var = &ofb->fb.var;
811         int pfor = NONSTD_TO_PFOR(var->nonstd);
812         int size, bpp = 0;
813
814         switch (pfor) {
815         case OVERLAY_FORMAT_RGB: bpp = var->bits_per_pixel; break;
816         case OVERLAY_FORMAT_YUV444_PACKED: bpp = 24; break;
817         case OVERLAY_FORMAT_YUV444_PLANAR: bpp = 24; break;
818         case OVERLAY_FORMAT_YUV422_PLANAR: bpp = 16; break;
819         case OVERLAY_FORMAT_YUV420_PLANAR: bpp = 12; break;
820         }
821
822         ofb->fb.fix.line_length = var->xres_virtual * bpp / 8;
823
824         size = PAGE_ALIGN(ofb->fb.fix.line_length * var->yres_virtual);
825
826         if (ofb->video_mem) {
827                 if (ofb->video_mem_size >= size)
828                         return 0;
829         }
830         return -EINVAL;
831 }
832
833 static int overlayfb_set_par(struct fb_info *info)
834 {
835         struct pxafb_layer *ofb = (struct pxafb_layer *)info;
836         struct fb_var_screeninfo *var = &info->var;
837         int xpos, ypos, pfor, bpp, ret;
838
839         ret = overlayfb_check_video_memory(ofb);
840         if (ret)
841                 return ret;
842
843         bpp  = pxafb_var_to_bpp(var);
844         xpos = NONSTD_TO_XPOS(var->nonstd);
845         ypos = NONSTD_TO_YPOS(var->nonstd);
846         pfor = NONSTD_TO_PFOR(var->nonstd);
847
848         ofb->control[0] = OVLxC1_PPL(var->xres) | OVLxC1_LPO(var->yres) |
849                           OVLxC1_BPP(bpp);
850         ofb->control[1] = OVLxC2_XPOS(xpos) | OVLxC2_YPOS(ypos);
851
852         if (ofb->id == OVERLAY2)
853                 ofb->control[1] |= OVL2C2_PFOR(pfor);
854
855         ofb->ops->setup(ofb);
856         ofb->ops->enable(ofb);
857         return 0;
858 }
859
860 static struct fb_ops overlay_fb_ops = {
861         .owner                  = THIS_MODULE,
862         .fb_open                = overlayfb_open,
863         .fb_release             = overlayfb_release,
864         .fb_check_var           = overlayfb_check_var,
865         .fb_set_par             = overlayfb_set_par,
866 };
867
868 static void __devinit init_pxafb_overlay(struct pxafb_info *fbi,
869                                          struct pxafb_layer *ofb, int id)
870 {
871         sprintf(ofb->fb.fix.id, "overlay%d", id + 1);
872
873         ofb->fb.fix.type                = FB_TYPE_PACKED_PIXELS;
874         ofb->fb.fix.xpanstep            = 0;
875         ofb->fb.fix.ypanstep            = 1;
876
877         ofb->fb.var.activate            = FB_ACTIVATE_NOW;
878         ofb->fb.var.height              = -1;
879         ofb->fb.var.width               = -1;
880         ofb->fb.var.vmode               = FB_VMODE_NONINTERLACED;
881
882         ofb->fb.fbops                   = &overlay_fb_ops;
883         ofb->fb.flags                   = FBINFO_FLAG_DEFAULT;
884         ofb->fb.node                    = -1;
885         ofb->fb.pseudo_palette          = NULL;
886
887         ofb->id = id;
888         ofb->ops = &ofb_ops[id];
889         ofb->usage = 0;
890         ofb->fbi = fbi;
891         init_completion(&ofb->branch_done);
892 }
893
894 static inline int pxafb_overlay_supported(void)
895 {
896         if (cpu_is_pxa27x() || cpu_is_pxa3xx())
897                 return 1;
898
899         return 0;
900 }
901
902 static int __devinit pxafb_overlay_map_video_memory(struct pxafb_info *pxafb,
903         struct pxafb_layer *ofb)
904 {
905         /* We assume that user will use at most video_mem_size for overlay fb,
906          * anyway, it's useless to use 16bpp main plane and 24bpp overlay
907          */
908         ofb->video_mem = alloc_pages_exact(PAGE_ALIGN(pxafb->video_mem_size),
909                 GFP_KERNEL | __GFP_ZERO);
910         if (ofb->video_mem == NULL)
911                 return -ENOMEM;
912
913         ofb->video_mem_phys = virt_to_phys(ofb->video_mem);
914         ofb->video_mem_size = PAGE_ALIGN(pxafb->video_mem_size);
915
916         mutex_lock(&ofb->fb.mm_lock);
917         ofb->fb.fix.smem_start  = ofb->video_mem_phys;
918         ofb->fb.fix.smem_len    = pxafb->video_mem_size;
919         mutex_unlock(&ofb->fb.mm_lock);
920
921         ofb->fb.screen_base     = ofb->video_mem;
922
923         return 0;
924 }
925
926 static void __devinit pxafb_overlay_init(struct pxafb_info *fbi)
927 {
928         int i, ret;
929
930         if (!pxafb_overlay_supported())
931                 return;
932
933         for (i = 0; i < 2; i++) {
934                 struct pxafb_layer *ofb = &fbi->overlay[i];
935                 init_pxafb_overlay(fbi, ofb, i);
936                 ret = register_framebuffer(&ofb->fb);
937                 if (ret) {
938                         dev_err(fbi->dev, "failed to register overlay %d\n", i);
939                         continue;
940                 }
941                 ret = pxafb_overlay_map_video_memory(fbi, ofb);
942                 if (ret) {
943                         dev_err(fbi->dev,
944                                 "failed to map video memory for overlay %d\n",
945                                 i);
946                         unregister_framebuffer(&ofb->fb);
947                         continue;
948                 }
949                 ofb->registered = 1;
950         }
951
952         /* mask all IU/BS/EOF/SOF interrupts */
953         lcd_writel(fbi, LCCR5, ~0);
954
955         pr_info("PXA Overlay driver loaded successfully!\n");
956 }
957
958 static void __devexit pxafb_overlay_exit(struct pxafb_info *fbi)
959 {
960         int i;
961
962         if (!pxafb_overlay_supported())
963                 return;
964
965         for (i = 0; i < 2; i++) {
966                 struct pxafb_layer *ofb = &fbi->overlay[i];
967                 if (ofb->registered) {
968                         if (ofb->video_mem)
969                                 free_pages_exact(ofb->video_mem,
970                                         ofb->video_mem_size);
971                         unregister_framebuffer(&ofb->fb);
972                 }
973         }
974 }
975 #else
976 static inline void pxafb_overlay_init(struct pxafb_info *fbi) {}
977 static inline void pxafb_overlay_exit(struct pxafb_info *fbi) {}
978 #endif /* CONFIG_FB_PXA_OVERLAY */
979
980 /*
981  * Calculate the PCD value from the clock rate (in picoseconds).
982  * We take account of the PPCR clock setting.
983  * From PXA Developer's Manual:
984  *
985  *   PixelClock =      LCLK
986  *                -------------
987  *                2 ( PCD + 1 )
988  *
989  *   PCD =      LCLK
990  *         ------------- - 1
991  *         2(PixelClock)
992  *
993  * Where:
994  *   LCLK = LCD/Memory Clock
995  *   PCD = LCCR3[7:0]
996  *
997  * PixelClock here is in Hz while the pixclock argument given is the
998  * period in picoseconds. Hence PixelClock = 1 / ( pixclock * 10^-12 )
999  *
1000  * The function get_lclk_frequency_10khz returns LCLK in units of
1001  * 10khz. Calling the result of this function lclk gives us the
1002  * following
1003  *
1004  *    PCD = (lclk * 10^4 ) * ( pixclock * 10^-12 )
1005  *          -------------------------------------- - 1
1006  *                          2
1007  *
1008  * Factoring the 10^4 and 10^-12 out gives 10^-8 == 1 / 100000000 as used below.
1009  */
1010 static inline unsigned int get_pcd(struct pxafb_info *fbi,
1011                                    unsigned int pixclock)
1012 {
1013         unsigned long long pcd;
1014
1015         /* FIXME: Need to take into account Double Pixel Clock mode
1016          * (DPC) bit? or perhaps set it based on the various clock
1017          * speeds */
1018         pcd = (unsigned long long)(clk_get_rate(fbi->clk) / 10000);
1019         pcd *= pixclock;
1020         do_div(pcd, 100000000 * 2);
1021         /* no need for this, since we should subtract 1 anyway. they cancel */
1022         /* pcd += 1; */ /* make up for integer math truncations */
1023         return (unsigned int)pcd;
1024 }
1025
1026 /*
1027  * Some touchscreens need hsync information from the video driver to
1028  * function correctly. We export it here.  Note that 'hsync_time' and
1029  * the value returned from pxafb_get_hsync_time() is the *reciprocal*
1030  * of the hsync period in seconds.
1031  */
1032 static inline void set_hsync_time(struct pxafb_info *fbi, unsigned int pcd)
1033 {
1034         unsigned long htime;
1035
1036         if ((pcd == 0) || (fbi->fb.var.hsync_len == 0)) {
1037                 fbi->hsync_time = 0;
1038                 return;
1039         }
1040
1041         htime = clk_get_rate(fbi->clk) / (pcd * fbi->fb.var.hsync_len);
1042
1043         fbi->hsync_time = htime;
1044 }
1045
1046 unsigned long pxafb_get_hsync_time(struct device *dev)
1047 {
1048         struct pxafb_info *fbi = dev_get_drvdata(dev);
1049
1050         /* If display is blanked/suspended, hsync isn't active */
1051         if (!fbi || (fbi->state != C_ENABLE))
1052                 return 0;
1053
1054         return fbi->hsync_time;
1055 }
1056 EXPORT_SYMBOL(pxafb_get_hsync_time);
1057
1058 static int setup_frame_dma(struct pxafb_info *fbi, int dma, int pal,
1059                            unsigned long start, size_t size)
1060 {
1061         struct pxafb_dma_descriptor *dma_desc, *pal_desc;
1062         unsigned int dma_desc_off, pal_desc_off;
1063
1064         if (dma < 0 || dma >= DMA_MAX * 2)
1065                 return -EINVAL;
1066
1067         dma_desc = &fbi->dma_buff->dma_desc[dma];
1068         dma_desc_off = offsetof(struct pxafb_dma_buff, dma_desc[dma]);
1069
1070         dma_desc->fsadr = start;
1071         dma_desc->fidr  = 0;
1072         dma_desc->ldcmd = size;
1073
1074         if (pal < 0 || pal >= PAL_MAX * 2) {
1075                 dma_desc->fdadr = fbi->dma_buff_phys + dma_desc_off;
1076                 fbi->fdadr[dma] = fbi->dma_buff_phys + dma_desc_off;
1077         } else {
1078                 pal_desc = &fbi->dma_buff->pal_desc[pal];
1079                 pal_desc_off = offsetof(struct pxafb_dma_buff, pal_desc[pal]);
1080
1081                 pal_desc->fsadr = fbi->dma_buff_phys + pal * PALETTE_SIZE;
1082                 pal_desc->fidr  = 0;
1083
1084                 if ((fbi->lccr4 & LCCR4_PAL_FOR_MASK) == LCCR4_PAL_FOR_0)
1085                         pal_desc->ldcmd = fbi->palette_size * sizeof(u16);
1086                 else
1087                         pal_desc->ldcmd = fbi->palette_size * sizeof(u32);
1088
1089                 pal_desc->ldcmd |= LDCMD_PAL;
1090
1091                 /* flip back and forth between palette and frame buffer */
1092                 pal_desc->fdadr = fbi->dma_buff_phys + dma_desc_off;
1093                 dma_desc->fdadr = fbi->dma_buff_phys + pal_desc_off;
1094                 fbi->fdadr[dma] = fbi->dma_buff_phys + dma_desc_off;
1095         }
1096
1097         return 0;
1098 }
1099
1100 static void setup_base_frame(struct pxafb_info *fbi,
1101                              struct fb_var_screeninfo *var,
1102                              int branch)
1103 {
1104         struct fb_fix_screeninfo *fix = &fbi->fb.fix;
1105         int nbytes, dma, pal, bpp = var->bits_per_pixel;
1106         unsigned long offset;
1107
1108         dma = DMA_BASE + (branch ? DMA_MAX : 0);
1109         pal = (bpp >= 16) ? PAL_NONE : PAL_BASE + (branch ? PAL_MAX : 0);
1110
1111         nbytes = fix->line_length * var->yres;
1112         offset = fix->line_length * var->yoffset + fbi->video_mem_phys;
1113
1114         if (fbi->lccr0 & LCCR0_SDS) {
1115                 nbytes = nbytes / 2;
1116                 setup_frame_dma(fbi, dma + 1, PAL_NONE, offset + nbytes, nbytes);
1117         }
1118
1119         setup_frame_dma(fbi, dma, pal, offset, nbytes);
1120 }
1121
1122 #ifdef CONFIG_FB_PXA_SMARTPANEL
1123 static int setup_smart_dma(struct pxafb_info *fbi)
1124 {
1125         struct pxafb_dma_descriptor *dma_desc;
1126         unsigned long dma_desc_off, cmd_buff_off;
1127
1128         dma_desc = &fbi->dma_buff->dma_desc[DMA_CMD];
1129         dma_desc_off = offsetof(struct pxafb_dma_buff, dma_desc[DMA_CMD]);
1130         cmd_buff_off = offsetof(struct pxafb_dma_buff, cmd_buff);
1131
1132         dma_desc->fdadr = fbi->dma_buff_phys + dma_desc_off;
1133         dma_desc->fsadr = fbi->dma_buff_phys + cmd_buff_off;
1134         dma_desc->fidr  = 0;
1135         dma_desc->ldcmd = fbi->n_smart_cmds * sizeof(uint16_t);
1136
1137         fbi->fdadr[DMA_CMD] = dma_desc->fdadr;
1138         return 0;
1139 }
1140
1141 int pxafb_smart_flush(struct fb_info *info)
1142 {
1143         struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb);
1144         uint32_t prsr;
1145         int ret = 0;
1146
1147         /* disable controller until all registers are set up */
1148         lcd_writel(fbi, LCCR0, fbi->reg_lccr0 & ~LCCR0_ENB);
1149
1150         /* 1. make it an even number of commands to align on 32-bit boundary
1151          * 2. add the interrupt command to the end of the chain so we can
1152          *    keep track of the end of the transfer
1153          */
1154
1155         while (fbi->n_smart_cmds & 1)
1156                 fbi->smart_cmds[fbi->n_smart_cmds++] = SMART_CMD_NOOP;
1157
1158         fbi->smart_cmds[fbi->n_smart_cmds++] = SMART_CMD_INTERRUPT;
1159         fbi->smart_cmds[fbi->n_smart_cmds++] = SMART_CMD_WAIT_FOR_VSYNC;
1160         setup_smart_dma(fbi);
1161
1162         /* continue to execute next command */
1163         prsr = lcd_readl(fbi, PRSR) | PRSR_ST_OK | PRSR_CON_NT;
1164         lcd_writel(fbi, PRSR, prsr);
1165
1166         /* stop the processor in case it executed "wait for sync" cmd */
1167         lcd_writel(fbi, CMDCR, 0x0001);
1168
1169         /* don't send interrupts for fifo underruns on channel 6 */
1170         lcd_writel(fbi, LCCR5, LCCR5_IUM(6));
1171
1172         lcd_writel(fbi, LCCR1, fbi->reg_lccr1);
1173         lcd_writel(fbi, LCCR2, fbi->reg_lccr2);
1174         lcd_writel(fbi, LCCR3, fbi->reg_lccr3);
1175         lcd_writel(fbi, LCCR4, fbi->reg_lccr4);
1176         lcd_writel(fbi, FDADR0, fbi->fdadr[0]);
1177         lcd_writel(fbi, FDADR6, fbi->fdadr[6]);
1178
1179         /* begin sending */
1180         lcd_writel(fbi, LCCR0, fbi->reg_lccr0 | LCCR0_ENB);
1181
1182         if (wait_for_completion_timeout(&fbi->command_done, HZ/2) == 0) {
1183                 pr_warning("%s: timeout waiting for command done\n",
1184                                 __func__);
1185                 ret = -ETIMEDOUT;
1186         }
1187
1188         /* quick disable */
1189         prsr = lcd_readl(fbi, PRSR) & ~(PRSR_ST_OK | PRSR_CON_NT);
1190         lcd_writel(fbi, PRSR, prsr);
1191         lcd_writel(fbi, LCCR0, fbi->reg_lccr0 & ~LCCR0_ENB);
1192         lcd_writel(fbi, FDADR6, 0);
1193         fbi->n_smart_cmds = 0;
1194         return ret;
1195 }
1196
1197 int pxafb_smart_queue(struct fb_info *info, uint16_t *cmds, int n_cmds)
1198 {
1199         int i;
1200         struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb);
1201
1202         for (i = 0; i < n_cmds; i++, cmds++) {
1203                 /* if it is a software delay, flush and delay */
1204                 if ((*cmds & 0xff00) == SMART_CMD_DELAY) {
1205                         pxafb_smart_flush(info);
1206                         mdelay(*cmds & 0xff);
1207                         continue;
1208                 }
1209
1210                 /* leave 2 commands for INTERRUPT and WAIT_FOR_SYNC */
1211                 if (fbi->n_smart_cmds == CMD_BUFF_SIZE - 8)
1212                         pxafb_smart_flush(info);
1213
1214                 fbi->smart_cmds[fbi->n_smart_cmds++] = *cmds;
1215         }
1216
1217         return 0;
1218 }
1219
1220 static unsigned int __smart_timing(unsigned time_ns, unsigned long lcd_clk)
1221 {
1222         unsigned int t = (time_ns * (lcd_clk / 1000000) / 1000);
1223         return (t == 0) ? 1 : t;
1224 }
1225
1226 static void setup_smart_timing(struct pxafb_info *fbi,
1227                                 struct fb_var_screeninfo *var)
1228 {
1229         struct pxafb_mach_info *inf = fbi->dev->platform_data;
1230         struct pxafb_mode_info *mode = &inf->modes[0];
1231         unsigned long lclk = clk_get_rate(fbi->clk);
1232         unsigned t1, t2, t3, t4;
1233
1234         t1 = max(mode->a0csrd_set_hld, mode->a0cswr_set_hld);
1235         t2 = max(mode->rd_pulse_width, mode->wr_pulse_width);
1236         t3 = mode->op_hold_time;
1237         t4 = mode->cmd_inh_time;
1238
1239         fbi->reg_lccr1 =
1240                 LCCR1_DisWdth(var->xres) |
1241                 LCCR1_BegLnDel(__smart_timing(t1, lclk)) |
1242                 LCCR1_EndLnDel(__smart_timing(t2, lclk)) |
1243                 LCCR1_HorSnchWdth(__smart_timing(t3, lclk));
1244
1245         fbi->reg_lccr2 = LCCR2_DisHght(var->yres);
1246         fbi->reg_lccr3 = fbi->lccr3 | LCCR3_PixClkDiv(__smart_timing(t4, lclk));
1247         fbi->reg_lccr3 |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? LCCR3_HSP : 0;
1248         fbi->reg_lccr3 |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? LCCR3_VSP : 0;
1249
1250         /* FIXME: make this configurable */
1251         fbi->reg_cmdcr = 1;
1252 }
1253
1254 static int pxafb_smart_thread(void *arg)
1255 {
1256         struct pxafb_info *fbi = arg;
1257         struct pxafb_mach_info *inf = fbi->dev->platform_data;
1258
1259         if (!inf->smart_update) {
1260                 pr_err("%s: not properly initialized, thread terminated\n",
1261                                 __func__);
1262                 return -EINVAL;
1263         }
1264         inf = fbi->dev->platform_data;
1265
1266         pr_debug("%s(): task starting\n", __func__);
1267
1268         set_freezable();
1269         while (!kthread_should_stop()) {
1270
1271                 if (try_to_freeze())
1272                         continue;
1273
1274                 mutex_lock(&fbi->ctrlr_lock);
1275
1276                 if (fbi->state == C_ENABLE) {
1277                         inf->smart_update(&fbi->fb);
1278                         complete(&fbi->refresh_done);
1279                 }
1280
1281                 mutex_unlock(&fbi->ctrlr_lock);
1282
1283                 set_current_state(TASK_INTERRUPTIBLE);
1284                 schedule_timeout(30 * HZ / 1000);
1285         }
1286
1287         pr_debug("%s(): task ending\n", __func__);
1288         return 0;
1289 }
1290
1291 static int pxafb_smart_init(struct pxafb_info *fbi)
1292 {
1293         if (!(fbi->lccr0 & LCCR0_LCDT))
1294                 return 0;
1295
1296         fbi->smart_cmds = (uint16_t *) fbi->dma_buff->cmd_buff;
1297         fbi->n_smart_cmds = 0;
1298
1299         init_completion(&fbi->command_done);
1300         init_completion(&fbi->refresh_done);
1301
1302         fbi->smart_thread = kthread_run(pxafb_smart_thread, fbi,
1303                                         "lcd_refresh");
1304         if (IS_ERR(fbi->smart_thread)) {
1305                 pr_err("%s: unable to create kernel thread\n", __func__);
1306                 return PTR_ERR(fbi->smart_thread);
1307         }
1308
1309         return 0;
1310 }
1311 #else
1312 int pxafb_smart_queue(struct fb_info *info, uint16_t *cmds, int n_cmds)
1313 {
1314         return 0;
1315 }
1316
1317 int pxafb_smart_flush(struct fb_info *info)
1318 {
1319         return 0;
1320 }
1321
1322 static inline int pxafb_smart_init(struct pxafb_info *fbi) { return 0; }
1323 #endif /* CONFIG_FB_PXA_SMARTPANEL */
1324
1325 static void setup_parallel_timing(struct pxafb_info *fbi,
1326                                   struct fb_var_screeninfo *var)
1327 {
1328         unsigned int lines_per_panel, pcd = get_pcd(fbi, var->pixclock);
1329
1330         fbi->reg_lccr1 =
1331                 LCCR1_DisWdth(var->xres) +
1332                 LCCR1_HorSnchWdth(var->hsync_len) +
1333                 LCCR1_BegLnDel(var->left_margin) +
1334                 LCCR1_EndLnDel(var->right_margin);
1335
1336         /*
1337          * If we have a dual scan LCD, we need to halve
1338          * the YRES parameter.
1339          */
1340         lines_per_panel = var->yres;
1341         if ((fbi->lccr0 & LCCR0_SDS) == LCCR0_Dual)
1342                 lines_per_panel /= 2;
1343
1344         fbi->reg_lccr2 =
1345                 LCCR2_DisHght(lines_per_panel) +
1346                 LCCR2_VrtSnchWdth(var->vsync_len) +
1347                 LCCR2_BegFrmDel(var->upper_margin) +
1348                 LCCR2_EndFrmDel(var->lower_margin);
1349
1350         fbi->reg_lccr3 = fbi->lccr3 |
1351                 (var->sync & FB_SYNC_HOR_HIGH_ACT ?
1352                  LCCR3_HorSnchH : LCCR3_HorSnchL) |
1353                 (var->sync & FB_SYNC_VERT_HIGH_ACT ?
1354                  LCCR3_VrtSnchH : LCCR3_VrtSnchL);
1355
1356         if (pcd) {
1357                 fbi->reg_lccr3 |= LCCR3_PixClkDiv(pcd);
1358                 set_hsync_time(fbi, pcd);
1359         }
1360 }
1361
1362 /*
1363  * pxafb_activate_var():
1364  *      Configures LCD Controller based on entries in var parameter.
1365  *      Settings are only written to the controller if changes were made.
1366  */
1367 static int pxafb_activate_var(struct fb_var_screeninfo *var,
1368                               struct pxafb_info *fbi)
1369 {
1370         u_long flags;
1371
1372         /* Update shadow copy atomically */
1373         local_irq_save(flags);
1374
1375 #ifdef CONFIG_FB_PXA_SMARTPANEL
1376         if (fbi->lccr0 & LCCR0_LCDT)
1377                 setup_smart_timing(fbi, var);
1378         else
1379 #endif
1380                 setup_parallel_timing(fbi, var);
1381
1382         setup_base_frame(fbi, var, 0);
1383
1384         fbi->reg_lccr0 = fbi->lccr0 |
1385                 (LCCR0_LDM | LCCR0_SFM | LCCR0_IUM | LCCR0_EFM |
1386                  LCCR0_QDM | LCCR0_BM  | LCCR0_OUM);
1387
1388         fbi->reg_lccr3 |= pxafb_var_to_lccr3(var);
1389
1390         fbi->reg_lccr4 = lcd_readl(fbi, LCCR4) & ~LCCR4_PAL_FOR_MASK;
1391         fbi->reg_lccr4 |= (fbi->lccr4 & LCCR4_PAL_FOR_MASK);
1392         local_irq_restore(flags);
1393
1394         /*
1395          * Only update the registers if the controller is enabled
1396          * and something has changed.
1397          */
1398         if ((lcd_readl(fbi, LCCR0) != fbi->reg_lccr0) ||
1399             (lcd_readl(fbi, LCCR1) != fbi->reg_lccr1) ||
1400             (lcd_readl(fbi, LCCR2) != fbi->reg_lccr2) ||
1401             (lcd_readl(fbi, LCCR3) != fbi->reg_lccr3) ||
1402             (lcd_readl(fbi, LCCR4) != fbi->reg_lccr4) ||
1403             (lcd_readl(fbi, FDADR0) != fbi->fdadr[0]) ||
1404             ((fbi->lccr0 & LCCR0_SDS) &&
1405             (lcd_readl(fbi, FDADR1) != fbi->fdadr[1])))
1406                 pxafb_schedule_work(fbi, C_REENABLE);
1407
1408         return 0;
1409 }
1410
1411 /*
1412  * NOTE!  The following functions are purely helpers for set_ctrlr_state.
1413  * Do not call them directly; set_ctrlr_state does the correct serialisation
1414  * to ensure that things happen in the right way 100% of time time.
1415  *      -- rmk
1416  */
1417 static inline void __pxafb_backlight_power(struct pxafb_info *fbi, int on)
1418 {
1419         pr_debug("pxafb: backlight o%s\n", on ? "n" : "ff");
1420
1421         if (fbi->backlight_power)
1422                 fbi->backlight_power(on);
1423 }
1424
1425 static inline void __pxafb_lcd_power(struct pxafb_info *fbi, int on)
1426 {
1427         pr_debug("pxafb: LCD power o%s\n", on ? "n" : "ff");
1428
1429         if (fbi->lcd_power)
1430                 fbi->lcd_power(on, &fbi->fb.var);
1431 }
1432
1433 static void pxafb_enable_controller(struct pxafb_info *fbi)
1434 {
1435         pr_debug("pxafb: Enabling LCD controller\n");
1436         pr_debug("fdadr0 0x%08x\n", (unsigned int) fbi->fdadr[0]);
1437         pr_debug("fdadr1 0x%08x\n", (unsigned int) fbi->fdadr[1]);
1438         pr_debug("reg_lccr0 0x%08x\n", (unsigned int) fbi->reg_lccr0);
1439         pr_debug("reg_lccr1 0x%08x\n", (unsigned int) fbi->reg_lccr1);
1440         pr_debug("reg_lccr2 0x%08x\n", (unsigned int) fbi->reg_lccr2);
1441         pr_debug("reg_lccr3 0x%08x\n", (unsigned int) fbi->reg_lccr3);
1442
1443         /* enable LCD controller clock */
1444         clk_enable(fbi->clk);
1445
1446         if (fbi->lccr0 & LCCR0_LCDT)
1447                 return;
1448
1449         /* Sequence from 11.7.10 */
1450         lcd_writel(fbi, LCCR4, fbi->reg_lccr4);
1451         lcd_writel(fbi, LCCR3, fbi->reg_lccr3);
1452         lcd_writel(fbi, LCCR2, fbi->reg_lccr2);
1453         lcd_writel(fbi, LCCR1, fbi->reg_lccr1);
1454         lcd_writel(fbi, LCCR0, fbi->reg_lccr0 & ~LCCR0_ENB);
1455
1456         lcd_writel(fbi, FDADR0, fbi->fdadr[0]);
1457         if (fbi->lccr0 & LCCR0_SDS)
1458                 lcd_writel(fbi, FDADR1, fbi->fdadr[1]);
1459         lcd_writel(fbi, LCCR0, fbi->reg_lccr0 | LCCR0_ENB);
1460 }
1461
1462 static void pxafb_disable_controller(struct pxafb_info *fbi)
1463 {
1464         uint32_t lccr0;
1465
1466 #ifdef CONFIG_FB_PXA_SMARTPANEL
1467         if (fbi->lccr0 & LCCR0_LCDT) {
1468                 wait_for_completion_timeout(&fbi->refresh_done,
1469                                 200 * HZ / 1000);
1470                 return;
1471         }
1472 #endif
1473
1474         /* Clear LCD Status Register */
1475         lcd_writel(fbi, LCSR, 0xffffffff);
1476
1477         lccr0 = lcd_readl(fbi, LCCR0) & ~LCCR0_LDM;
1478         lcd_writel(fbi, LCCR0, lccr0);
1479         lcd_writel(fbi, LCCR0, lccr0 | LCCR0_DIS);
1480
1481         wait_for_completion_timeout(&fbi->disable_done, 200 * HZ / 1000);
1482
1483         /* disable LCD controller clock */
1484         clk_disable(fbi->clk);
1485 }
1486
1487 /*
1488  *  pxafb_handle_irq: Handle 'LCD DONE' interrupts.
1489  */
1490 static irqreturn_t pxafb_handle_irq(int irq, void *dev_id)
1491 {
1492         struct pxafb_info *fbi = dev_id;
1493         unsigned int lccr0, lcsr;
1494
1495         lcsr = lcd_readl(fbi, LCSR);
1496         if (lcsr & LCSR_LDD) {
1497                 lccr0 = lcd_readl(fbi, LCCR0);
1498                 lcd_writel(fbi, LCCR0, lccr0 | LCCR0_LDM);
1499                 complete(&fbi->disable_done);
1500         }
1501
1502 #ifdef CONFIG_FB_PXA_SMARTPANEL
1503         if (lcsr & LCSR_CMD_INT)
1504                 complete(&fbi->command_done);
1505 #endif
1506         lcd_writel(fbi, LCSR, lcsr);
1507
1508 #ifdef CONFIG_FB_PXA_OVERLAY
1509         {
1510                 unsigned int lcsr1 = lcd_readl(fbi, LCSR1);
1511                 if (lcsr1 & LCSR1_BS(1))
1512                         complete(&fbi->overlay[0].branch_done);
1513
1514                 if (lcsr1 & LCSR1_BS(2))
1515                         complete(&fbi->overlay[1].branch_done);
1516
1517                 lcd_writel(fbi, LCSR1, lcsr1);
1518         }
1519 #endif
1520         return IRQ_HANDLED;
1521 }
1522
1523 /*
1524  * This function must be called from task context only, since it will
1525  * sleep when disabling the LCD controller, or if we get two contending
1526  * processes trying to alter state.
1527  */
1528 static void set_ctrlr_state(struct pxafb_info *fbi, u_int state)
1529 {
1530         u_int old_state;
1531
1532         mutex_lock(&fbi->ctrlr_lock);
1533
1534         old_state = fbi->state;
1535
1536         /*
1537          * Hack around fbcon initialisation.
1538          */
1539         if (old_state == C_STARTUP && state == C_REENABLE)
1540                 state = C_ENABLE;
1541
1542         switch (state) {
1543         case C_DISABLE_CLKCHANGE:
1544                 /*
1545                  * Disable controller for clock change.  If the
1546                  * controller is already disabled, then do nothing.
1547                  */
1548                 if (old_state != C_DISABLE && old_state != C_DISABLE_PM) {
1549                         fbi->state = state;
1550                         /* TODO __pxafb_lcd_power(fbi, 0); */
1551                         pxafb_disable_controller(fbi);
1552                 }
1553                 break;
1554
1555         case C_DISABLE_PM:
1556         case C_DISABLE:
1557                 /*
1558                  * Disable controller
1559                  */
1560                 if (old_state != C_DISABLE) {
1561                         fbi->state = state;
1562                         __pxafb_backlight_power(fbi, 0);
1563                         __pxafb_lcd_power(fbi, 0);
1564                         if (old_state != C_DISABLE_CLKCHANGE)
1565                                 pxafb_disable_controller(fbi);
1566                 }
1567                 break;
1568
1569         case C_ENABLE_CLKCHANGE:
1570                 /*
1571                  * Enable the controller after clock change.  Only
1572                  * do this if we were disabled for the clock change.
1573                  */
1574                 if (old_state == C_DISABLE_CLKCHANGE) {
1575                         fbi->state = C_ENABLE;
1576                         pxafb_enable_controller(fbi);
1577                         /* TODO __pxafb_lcd_power(fbi, 1); */
1578                 }
1579                 break;
1580
1581         case C_REENABLE:
1582                 /*
1583                  * Re-enable the controller only if it was already
1584                  * enabled.  This is so we reprogram the control
1585                  * registers.
1586                  */
1587                 if (old_state == C_ENABLE) {
1588                         __pxafb_lcd_power(fbi, 0);
1589                         pxafb_disable_controller(fbi);
1590                         pxafb_enable_controller(fbi);
1591                         __pxafb_lcd_power(fbi, 1);
1592                 }
1593                 break;
1594
1595         case C_ENABLE_PM:
1596                 /*
1597                  * Re-enable the controller after PM.  This is not
1598                  * perfect - think about the case where we were doing
1599                  * a clock change, and we suspended half-way through.
1600                  */
1601                 if (old_state != C_DISABLE_PM)
1602                         break;
1603                 /* fall through */
1604
1605         case C_ENABLE:
1606                 /*
1607                  * Power up the LCD screen, enable controller, and
1608                  * turn on the backlight.
1609                  */
1610                 if (old_state != C_ENABLE) {
1611                         fbi->state = C_ENABLE;
1612                         pxafb_enable_controller(fbi);
1613                         __pxafb_lcd_power(fbi, 1);
1614                         __pxafb_backlight_power(fbi, 1);
1615                 }
1616                 break;
1617         }
1618         mutex_unlock(&fbi->ctrlr_lock);
1619 }
1620
1621 /*
1622  * Our LCD controller task (which is called when we blank or unblank)
1623  * via keventd.
1624  */
1625 static void pxafb_task(struct work_struct *work)
1626 {
1627         struct pxafb_info *fbi =
1628                 container_of(work, struct pxafb_info, task);
1629         u_int state = xchg(&fbi->task_state, -1);
1630
1631         set_ctrlr_state(fbi, state);
1632 }
1633
1634 #ifdef CONFIG_CPU_FREQ
1635 /*
1636  * CPU clock speed change handler.  We need to adjust the LCD timing
1637  * parameters when the CPU clock is adjusted by the power management
1638  * subsystem.
1639  *
1640  * TODO: Determine why f->new != 10*get_lclk_frequency_10khz()
1641  */
1642 static int
1643 pxafb_freq_transition(struct notifier_block *nb, unsigned long val, void *data)
1644 {
1645         struct pxafb_info *fbi = TO_INF(nb, freq_transition);
1646         /* TODO struct cpufreq_freqs *f = data; */
1647         u_int pcd;
1648
1649         switch (val) {
1650         case CPUFREQ_PRECHANGE:
1651 #ifdef CONFIG_FB_PXA_OVERLAY
1652                 if (!(fbi->overlay[0].usage || fbi->overlay[1].usage))
1653 #endif
1654                         set_ctrlr_state(fbi, C_DISABLE_CLKCHANGE);
1655                 break;
1656
1657         case CPUFREQ_POSTCHANGE:
1658                 pcd = get_pcd(fbi, fbi->fb.var.pixclock);
1659                 set_hsync_time(fbi, pcd);
1660                 fbi->reg_lccr3 = (fbi->reg_lccr3 & ~0xff) |
1661                                   LCCR3_PixClkDiv(pcd);
1662                 set_ctrlr_state(fbi, C_ENABLE_CLKCHANGE);
1663                 break;
1664         }
1665         return 0;
1666 }
1667
1668 static int
1669 pxafb_freq_policy(struct notifier_block *nb, unsigned long val, void *data)
1670 {
1671         struct pxafb_info *fbi = TO_INF(nb, freq_policy);
1672         struct fb_var_screeninfo *var = &fbi->fb.var;
1673         struct cpufreq_policy *policy = data;
1674
1675         switch (val) {
1676         case CPUFREQ_ADJUST:
1677         case CPUFREQ_INCOMPATIBLE:
1678                 pr_debug("min dma period: %d ps, "
1679                         "new clock %d kHz\n", pxafb_display_dma_period(var),
1680                         policy->max);
1681                 /* TODO: fill in min/max values */
1682                 break;
1683         }
1684         return 0;
1685 }
1686 #endif
1687
1688 #ifdef CONFIG_PM
1689 /*
1690  * Power management hooks.  Note that we won't be called from IRQ context,
1691  * unlike the blank functions above, so we may sleep.
1692  */
1693 static int pxafb_suspend(struct device *dev)
1694 {
1695         struct pxafb_info *fbi = dev_get_drvdata(dev);
1696
1697         set_ctrlr_state(fbi, C_DISABLE_PM);
1698         return 0;
1699 }
1700
1701 static int pxafb_resume(struct device *dev)
1702 {
1703         struct pxafb_info *fbi = dev_get_drvdata(dev);
1704
1705         set_ctrlr_state(fbi, C_ENABLE_PM);
1706         return 0;
1707 }
1708
1709 static const struct dev_pm_ops pxafb_pm_ops = {
1710         .suspend        = pxafb_suspend,
1711         .resume         = pxafb_resume,
1712 };
1713 #endif
1714
1715 static int __devinit pxafb_init_video_memory(struct pxafb_info *fbi)
1716 {
1717         int size = PAGE_ALIGN(fbi->video_mem_size);
1718
1719         fbi->video_mem = alloc_pages_exact(size, GFP_KERNEL | __GFP_ZERO);
1720         if (fbi->video_mem == NULL)
1721                 return -ENOMEM;
1722
1723         fbi->video_mem_phys = virt_to_phys(fbi->video_mem);
1724         fbi->video_mem_size = size;
1725
1726         fbi->fb.fix.smem_start  = fbi->video_mem_phys;
1727         fbi->fb.fix.smem_len    = fbi->video_mem_size;
1728         fbi->fb.screen_base     = fbi->video_mem;
1729
1730         return fbi->video_mem ? 0 : -ENOMEM;
1731 }
1732
1733 static void pxafb_decode_mach_info(struct pxafb_info *fbi,
1734                                    struct pxafb_mach_info *inf)
1735 {
1736         unsigned int lcd_conn = inf->lcd_conn;
1737         struct pxafb_mode_info *m;
1738         int i;
1739
1740         fbi->cmap_inverse       = inf->cmap_inverse;
1741         fbi->cmap_static        = inf->cmap_static;
1742         fbi->lccr4              = inf->lccr4;
1743
1744         switch (lcd_conn & LCD_TYPE_MASK) {
1745         case LCD_TYPE_MONO_STN:
1746                 fbi->lccr0 = LCCR0_CMS;
1747                 break;
1748         case LCD_TYPE_MONO_DSTN:
1749                 fbi->lccr0 = LCCR0_CMS | LCCR0_SDS;
1750                 break;
1751         case LCD_TYPE_COLOR_STN:
1752                 fbi->lccr0 = 0;
1753                 break;
1754         case LCD_TYPE_COLOR_DSTN:
1755                 fbi->lccr0 = LCCR0_SDS;
1756                 break;
1757         case LCD_TYPE_COLOR_TFT:
1758                 fbi->lccr0 = LCCR0_PAS;
1759                 break;
1760         case LCD_TYPE_SMART_PANEL:
1761                 fbi->lccr0 = LCCR0_LCDT | LCCR0_PAS;
1762                 break;
1763         default:
1764                 /* fall back to backward compatibility way */
1765                 fbi->lccr0 = inf->lccr0;
1766                 fbi->lccr3 = inf->lccr3;
1767                 goto decode_mode;
1768         }
1769
1770         if (lcd_conn == LCD_MONO_STN_8BPP)
1771                 fbi->lccr0 |= LCCR0_DPD;
1772
1773         fbi->lccr0 |= (lcd_conn & LCD_ALTERNATE_MAPPING) ? LCCR0_LDDALT : 0;
1774
1775         fbi->lccr3 = LCCR3_Acb((inf->lcd_conn >> 10) & 0xff);
1776         fbi->lccr3 |= (lcd_conn & LCD_BIAS_ACTIVE_LOW) ? LCCR3_OEP : 0;
1777         fbi->lccr3 |= (lcd_conn & LCD_PCLK_EDGE_FALL)  ? LCCR3_PCP : 0;
1778
1779 decode_mode:
1780         pxafb_setmode(&fbi->fb.var, &inf->modes[0]);
1781
1782         /* decide video memory size as follows:
1783          * 1. default to mode of maximum resolution
1784          * 2. allow platform to override
1785          * 3. allow module parameter to override
1786          */
1787         for (i = 0, m = &inf->modes[0]; i < inf->num_modes; i++, m++)
1788                 fbi->video_mem_size = max_t(size_t, fbi->video_mem_size,
1789                                 m->xres * m->yres * m->bpp / 8);
1790
1791         if (inf->video_mem_size > fbi->video_mem_size)
1792                 fbi->video_mem_size = inf->video_mem_size;
1793
1794         if (video_mem_size > fbi->video_mem_size)
1795                 fbi->video_mem_size = video_mem_size;
1796 }
1797
1798 static struct pxafb_info * __devinit pxafb_init_fbinfo(struct device *dev)
1799 {
1800         struct pxafb_info *fbi;
1801         void *addr;
1802         struct pxafb_mach_info *inf = dev->platform_data;
1803
1804         /* Alloc the pxafb_info and pseudo_palette in one step */
1805         fbi = kmalloc(sizeof(struct pxafb_info) + sizeof(u32) * 16, GFP_KERNEL);
1806         if (!fbi)
1807                 return NULL;
1808
1809         memset(fbi, 0, sizeof(struct pxafb_info));
1810         fbi->dev = dev;
1811
1812         fbi->clk = clk_get(dev, NULL);
1813         if (IS_ERR(fbi->clk)) {
1814                 kfree(fbi);
1815                 return NULL;
1816         }
1817
1818         strcpy(fbi->fb.fix.id, PXA_NAME);
1819
1820         fbi->fb.fix.type        = FB_TYPE_PACKED_PIXELS;
1821         fbi->fb.fix.type_aux    = 0;
1822         fbi->fb.fix.xpanstep    = 0;
1823         fbi->fb.fix.ypanstep    = 1;
1824         fbi->fb.fix.ywrapstep   = 0;
1825         fbi->fb.fix.accel       = FB_ACCEL_NONE;
1826
1827         fbi->fb.var.nonstd      = 0;
1828         fbi->fb.var.activate    = FB_ACTIVATE_NOW;
1829         fbi->fb.var.height      = -1;
1830         fbi->fb.var.width       = -1;
1831         fbi->fb.var.accel_flags = FB_ACCELF_TEXT;
1832         fbi->fb.var.vmode       = FB_VMODE_NONINTERLACED;
1833
1834         fbi->fb.fbops           = &pxafb_ops;
1835         fbi->fb.flags           = FBINFO_DEFAULT;
1836         fbi->fb.node            = -1;
1837
1838         addr = fbi;
1839         addr = addr + sizeof(struct pxafb_info);
1840         fbi->fb.pseudo_palette  = addr;
1841
1842         fbi->state              = C_STARTUP;
1843         fbi->task_state         = (u_char)-1;
1844
1845         pxafb_decode_mach_info(fbi, inf);
1846
1847 #ifdef CONFIG_FB_PXA_OVERLAY
1848         /* place overlay(s) on top of base */
1849         if (pxafb_overlay_supported())
1850                 fbi->lccr0 |= LCCR0_OUC;
1851 #endif
1852
1853         init_waitqueue_head(&fbi->ctrlr_wait);
1854         INIT_WORK(&fbi->task, pxafb_task);
1855         mutex_init(&fbi->ctrlr_lock);
1856         init_completion(&fbi->disable_done);
1857
1858         return fbi;
1859 }
1860
1861 #ifdef CONFIG_FB_PXA_PARAMETERS
1862 static int __devinit parse_opt_mode(struct device *dev, const char *this_opt)
1863 {
1864         struct pxafb_mach_info *inf = dev->platform_data;
1865
1866         const char *name = this_opt+5;
1867         unsigned int namelen = strlen(name);
1868         int res_specified = 0, bpp_specified = 0;
1869         unsigned int xres = 0, yres = 0, bpp = 0;
1870         int yres_specified = 0;
1871         int i;
1872         for (i = namelen-1; i >= 0; i--) {
1873                 switch (name[i]) {
1874                 case '-':
1875                         namelen = i;
1876                         if (!bpp_specified && !yres_specified) {
1877                                 bpp = simple_strtoul(&name[i+1], NULL, 0);
1878                                 bpp_specified = 1;
1879                         } else
1880                                 goto done;
1881                         break;
1882                 case 'x':
1883                         if (!yres_specified) {
1884                                 yres = simple_strtoul(&name[i+1], NULL, 0);
1885                                 yres_specified = 1;
1886                         } else
1887                                 goto done;
1888                         break;
1889                 case '0' ... '9':
1890                         break;
1891                 default:
1892                         goto done;
1893                 }
1894         }
1895         if (i < 0 && yres_specified) {
1896                 xres = simple_strtoul(name, NULL, 0);
1897                 res_specified = 1;
1898         }
1899 done:
1900         if (res_specified) {
1901                 dev_info(dev, "overriding resolution: %dx%d\n", xres, yres);
1902                 inf->modes[0].xres = xres; inf->modes[0].yres = yres;
1903         }
1904         if (bpp_specified)
1905                 switch (bpp) {
1906                 case 1:
1907                 case 2:
1908                 case 4:
1909                 case 8:
1910                 case 16:
1911                         inf->modes[0].bpp = bpp;
1912                         dev_info(dev, "overriding bit depth: %d\n", bpp);
1913                         break;
1914                 default:
1915                         dev_err(dev, "Depth %d is not valid\n", bpp);
1916                         return -EINVAL;
1917                 }
1918         return 0;
1919 }
1920
1921 static int __devinit parse_opt(struct device *dev, char *this_opt)
1922 {
1923         struct pxafb_mach_info *inf = dev->platform_data;
1924         struct pxafb_mode_info *mode = &inf->modes[0];
1925         char s[64];
1926
1927         s[0] = '\0';
1928
1929         if (!strncmp(this_opt, "vmem:", 5)) {
1930                 video_mem_size = memparse(this_opt + 5, NULL);
1931         } else if (!strncmp(this_opt, "mode:", 5)) {
1932                 return parse_opt_mode(dev, this_opt);
1933         } else if (!strncmp(this_opt, "pixclock:", 9)) {
1934                 mode->pixclock = simple_strtoul(this_opt+9, NULL, 0);
1935                 sprintf(s, "pixclock: %ld\n", mode->pixclock);
1936         } else if (!strncmp(this_opt, "left:", 5)) {
1937                 mode->left_margin = simple_strtoul(this_opt+5, NULL, 0);
1938                 sprintf(s, "left: %u\n", mode->left_margin);
1939         } else if (!strncmp(this_opt, "right:", 6)) {
1940                 mode->right_margin = simple_strtoul(this_opt+6, NULL, 0);
1941                 sprintf(s, "right: %u\n", mode->right_margin);
1942         } else if (!strncmp(this_opt, "upper:", 6)) {
1943                 mode->upper_margin = simple_strtoul(this_opt+6, NULL, 0);
1944                 sprintf(s, "upper: %u\n", mode->upper_margin);
1945         } else if (!strncmp(this_opt, "lower:", 6)) {
1946                 mode->lower_margin = simple_strtoul(this_opt+6, NULL, 0);
1947                 sprintf(s, "lower: %u\n", mode->lower_margin);
1948         } else if (!strncmp(this_opt, "hsynclen:", 9)) {
1949                 mode->hsync_len = simple_strtoul(this_opt+9, NULL, 0);
1950                 sprintf(s, "hsynclen: %u\n", mode->hsync_len);
1951         } else if (!strncmp(this_opt, "vsynclen:", 9)) {
1952                 mode->vsync_len = simple_strtoul(this_opt+9, NULL, 0);
1953                 sprintf(s, "vsynclen: %u\n", mode->vsync_len);
1954         } else if (!strncmp(this_opt, "hsync:", 6)) {
1955                 if (simple_strtoul(this_opt+6, NULL, 0) == 0) {
1956                         sprintf(s, "hsync: Active Low\n");
1957                         mode->sync &= ~FB_SYNC_HOR_HIGH_ACT;
1958                 } else {
1959                         sprintf(s, "hsync: Active High\n");
1960                         mode->sync |= FB_SYNC_HOR_HIGH_ACT;
1961                 }
1962         } else if (!strncmp(this_opt, "vsync:", 6)) {
1963                 if (simple_strtoul(this_opt+6, NULL, 0) == 0) {
1964                         sprintf(s, "vsync: Active Low\n");
1965                         mode->sync &= ~FB_SYNC_VERT_HIGH_ACT;
1966                 } else {
1967                         sprintf(s, "vsync: Active High\n");
1968                         mode->sync |= FB_SYNC_VERT_HIGH_ACT;
1969                 }
1970         } else if (!strncmp(this_opt, "dpc:", 4)) {
1971                 if (simple_strtoul(this_opt+4, NULL, 0) == 0) {
1972                         sprintf(s, "double pixel clock: false\n");
1973                         inf->lccr3 &= ~LCCR3_DPC;
1974                 } else {
1975                         sprintf(s, "double pixel clock: true\n");
1976                         inf->lccr3 |= LCCR3_DPC;
1977                 }
1978         } else if (!strncmp(this_opt, "outputen:", 9)) {
1979                 if (simple_strtoul(this_opt+9, NULL, 0) == 0) {
1980                         sprintf(s, "output enable: active low\n");
1981                         inf->lccr3 = (inf->lccr3 & ~LCCR3_OEP) | LCCR3_OutEnL;
1982                 } else {
1983                         sprintf(s, "output enable: active high\n");
1984                         inf->lccr3 = (inf->lccr3 & ~LCCR3_OEP) | LCCR3_OutEnH;
1985                 }
1986         } else if (!strncmp(this_opt, "pixclockpol:", 12)) {
1987                 if (simple_strtoul(this_opt+12, NULL, 0) == 0) {
1988                         sprintf(s, "pixel clock polarity: falling edge\n");
1989                         inf->lccr3 = (inf->lccr3 & ~LCCR3_PCP) | LCCR3_PixFlEdg;
1990                 } else {
1991                         sprintf(s, "pixel clock polarity: rising edge\n");
1992                         inf->lccr3 = (inf->lccr3 & ~LCCR3_PCP) | LCCR3_PixRsEdg;
1993                 }
1994         } else if (!strncmp(this_opt, "color", 5)) {
1995                 inf->lccr0 = (inf->lccr0 & ~LCCR0_CMS) | LCCR0_Color;
1996         } else if (!strncmp(this_opt, "mono", 4)) {
1997                 inf->lccr0 = (inf->lccr0 & ~LCCR0_CMS) | LCCR0_Mono;
1998         } else if (!strncmp(this_opt, "active", 6)) {
1999                 inf->lccr0 = (inf->lccr0 & ~LCCR0_PAS) | LCCR0_Act;
2000         } else if (!strncmp(this_opt, "passive", 7)) {
2001                 inf->lccr0 = (inf->lccr0 & ~LCCR0_PAS) | LCCR0_Pas;
2002         } else if (!strncmp(this_opt, "single", 6)) {
2003                 inf->lccr0 = (inf->lccr0 & ~LCCR0_SDS) | LCCR0_Sngl;
2004         } else if (!strncmp(this_opt, "dual", 4)) {
2005                 inf->lccr0 = (inf->lccr0 & ~LCCR0_SDS) | LCCR0_Dual;
2006         } else if (!strncmp(this_opt, "4pix", 4)) {
2007                 inf->lccr0 = (inf->lccr0 & ~LCCR0_DPD) | LCCR0_4PixMono;
2008         } else if (!strncmp(this_opt, "8pix", 4)) {
2009                 inf->lccr0 = (inf->lccr0 & ~LCCR0_DPD) | LCCR0_8PixMono;
2010         } else {
2011                 dev_err(dev, "unknown option: %s\n", this_opt);
2012                 return -EINVAL;
2013         }
2014
2015         if (s[0] != '\0')
2016                 dev_info(dev, "override %s", s);
2017
2018         return 0;
2019 }
2020
2021 static int __devinit pxafb_parse_options(struct device *dev, char *options)
2022 {
2023         char *this_opt;
2024         int ret;
2025
2026         if (!options || !*options)
2027                 return 0;
2028
2029         dev_dbg(dev, "options are \"%s\"\n", options ? options : "null");
2030
2031         /* could be made table driven or similar?... */
2032         while ((this_opt = strsep(&options, ",")) != NULL) {
2033                 ret = parse_opt(dev, this_opt);
2034                 if (ret)
2035                         return ret;
2036         }
2037         return 0;
2038 }
2039
2040 static char g_options[256] __devinitdata = "";
2041
2042 #ifndef MODULE
2043 static int __init pxafb_setup_options(void)
2044 {
2045         char *options = NULL;
2046
2047         if (fb_get_options("pxafb", &options))
2048                 return -ENODEV;
2049
2050         if (options)
2051                 strlcpy(g_options, options, sizeof(g_options));
2052
2053         return 0;
2054 }
2055 #else
2056 #define pxafb_setup_options()           (0)
2057
2058 module_param_string(options, g_options, sizeof(g_options), 0);
2059 MODULE_PARM_DESC(options, "LCD parameters (see Documentation/fb/pxafb.txt)");
2060 #endif
2061
2062 #else
2063 #define pxafb_parse_options(...)        (0)
2064 #define pxafb_setup_options()           (0)
2065 #endif
2066
2067 #ifdef DEBUG_VAR
2068 /* Check for various illegal bit-combinations. Currently only
2069  * a warning is given. */
2070 static void __devinit pxafb_check_options(struct device *dev,
2071                                           struct pxafb_mach_info *inf)
2072 {
2073         if (inf->lcd_conn)
2074                 return;
2075
2076         if (inf->lccr0 & LCCR0_INVALID_CONFIG_MASK)
2077                 dev_warn(dev, "machine LCCR0 setting contains "
2078                                 "illegal bits: %08x\n",
2079                         inf->lccr0 & LCCR0_INVALID_CONFIG_MASK);
2080         if (inf->lccr3 & LCCR3_INVALID_CONFIG_MASK)
2081                 dev_warn(dev, "machine LCCR3 setting contains "
2082                                 "illegal bits: %08x\n",
2083                         inf->lccr3 & LCCR3_INVALID_CONFIG_MASK);
2084         if (inf->lccr0 & LCCR0_DPD &&
2085             ((inf->lccr0 & LCCR0_PAS) != LCCR0_Pas ||
2086              (inf->lccr0 & LCCR0_SDS) != LCCR0_Sngl ||
2087              (inf->lccr0 & LCCR0_CMS) != LCCR0_Mono))
2088                 dev_warn(dev, "Double Pixel Data (DPD) mode is "
2089                                 "only valid in passive mono"
2090                                 " single panel mode\n");
2091         if ((inf->lccr0 & LCCR0_PAS) == LCCR0_Act &&
2092             (inf->lccr0 & LCCR0_SDS) == LCCR0_Dual)
2093                 dev_warn(dev, "Dual panel only valid in passive mode\n");
2094         if ((inf->lccr0 & LCCR0_PAS) == LCCR0_Pas &&
2095              (inf->modes->upper_margin || inf->modes->lower_margin))
2096                 dev_warn(dev, "Upper and lower margins must be 0 in "
2097                                 "passive mode\n");
2098 }
2099 #else
2100 #define pxafb_check_options(...)        do {} while (0)
2101 #endif
2102
2103 static int __devinit pxafb_probe(struct platform_device *dev)
2104 {
2105         struct pxafb_info *fbi;
2106         struct pxafb_mach_info *inf;
2107         struct resource *r;
2108         int irq, ret;
2109
2110         dev_dbg(&dev->dev, "pxafb_probe\n");
2111
2112         inf = dev->dev.platform_data;
2113         ret = -ENOMEM;
2114         fbi = NULL;
2115         if (!inf)
2116                 goto failed;
2117
2118         ret = pxafb_parse_options(&dev->dev, g_options);
2119         if (ret < 0)
2120                 goto failed;
2121
2122         pxafb_check_options(&dev->dev, inf);
2123
2124         dev_dbg(&dev->dev, "got a %dx%dx%d LCD\n",
2125                         inf->modes->xres,
2126                         inf->modes->yres,
2127                         inf->modes->bpp);
2128         if (inf->modes->xres == 0 ||
2129             inf->modes->yres == 0 ||
2130             inf->modes->bpp == 0) {
2131                 dev_err(&dev->dev, "Invalid resolution or bit depth\n");
2132                 ret = -EINVAL;
2133                 goto failed;
2134         }
2135
2136         fbi = pxafb_init_fbinfo(&dev->dev);
2137         if (!fbi) {
2138                 /* only reason for pxafb_init_fbinfo to fail is kmalloc */
2139                 dev_err(&dev->dev, "Failed to initialize framebuffer device\n");
2140                 ret = -ENOMEM;
2141                 goto failed;
2142         }
2143
2144         if (cpu_is_pxa3xx() && inf->acceleration_enabled)
2145                 fbi->fb.fix.accel = FB_ACCEL_PXA3XX;
2146
2147         fbi->backlight_power = inf->pxafb_backlight_power;
2148         fbi->lcd_power = inf->pxafb_lcd_power;
2149
2150         r = platform_get_resource(dev, IORESOURCE_MEM, 0);
2151         if (r == NULL) {
2152                 dev_err(&dev->dev, "no I/O memory resource defined\n");
2153                 ret = -ENODEV;
2154                 goto failed_fbi;
2155         }
2156
2157         r = request_mem_region(r->start, resource_size(r), dev->name);
2158         if (r == NULL) {
2159                 dev_err(&dev->dev, "failed to request I/O memory\n");
2160                 ret = -EBUSY;
2161                 goto failed_fbi;
2162         }
2163
2164         fbi->mmio_base = ioremap(r->start, resource_size(r));
2165         if (fbi->mmio_base == NULL) {
2166                 dev_err(&dev->dev, "failed to map I/O memory\n");
2167                 ret = -EBUSY;
2168                 goto failed_free_res;
2169         }
2170
2171         fbi->dma_buff_size = PAGE_ALIGN(sizeof(struct pxafb_dma_buff));
2172         fbi->dma_buff = dma_alloc_coherent(fbi->dev, fbi->dma_buff_size,
2173                                 &fbi->dma_buff_phys, GFP_KERNEL);
2174         if (fbi->dma_buff == NULL) {
2175                 dev_err(&dev->dev, "failed to allocate memory for DMA\n");
2176                 ret = -ENOMEM;
2177                 goto failed_free_io;
2178         }
2179
2180         ret = pxafb_init_video_memory(fbi);
2181         if (ret) {
2182                 dev_err(&dev->dev, "Failed to allocate video RAM: %d\n", ret);
2183                 ret = -ENOMEM;
2184                 goto failed_free_dma;
2185         }
2186
2187         irq = platform_get_irq(dev, 0);
2188         if (irq < 0) {
2189                 dev_err(&dev->dev, "no IRQ defined\n");
2190                 ret = -ENODEV;
2191                 goto failed_free_mem;
2192         }
2193
2194         ret = request_irq(irq, pxafb_handle_irq, IRQF_DISABLED, "LCD", fbi);
2195         if (ret) {
2196                 dev_err(&dev->dev, "request_irq failed: %d\n", ret);
2197                 ret = -EBUSY;
2198                 goto failed_free_mem;
2199         }
2200
2201         ret = pxafb_smart_init(fbi);
2202         if (ret) {
2203                 dev_err(&dev->dev, "failed to initialize smartpanel\n");
2204                 goto failed_free_irq;
2205         }
2206
2207         /*
2208          * This makes sure that our colour bitfield
2209          * descriptors are correctly initialised.
2210          */
2211         ret = pxafb_check_var(&fbi->fb.var, &fbi->fb);
2212         if (ret) {
2213                 dev_err(&dev->dev, "failed to get suitable mode\n");
2214                 goto failed_free_irq;
2215         }
2216
2217         ret = pxafb_set_par(&fbi->fb);
2218         if (ret) {
2219                 dev_err(&dev->dev, "Failed to set parameters\n");
2220                 goto failed_free_irq;
2221         }
2222
2223         platform_set_drvdata(dev, fbi);
2224
2225         ret = register_framebuffer(&fbi->fb);
2226         if (ret < 0) {
2227                 dev_err(&dev->dev,
2228                         "Failed to register framebuffer device: %d\n", ret);
2229                 goto failed_free_cmap;
2230         }
2231
2232         pxafb_overlay_init(fbi);
2233
2234 #ifdef CONFIG_CPU_FREQ
2235         fbi->freq_transition.notifier_call = pxafb_freq_transition;
2236         fbi->freq_policy.notifier_call = pxafb_freq_policy;
2237         cpufreq_register_notifier(&fbi->freq_transition,
2238                                 CPUFREQ_TRANSITION_NOTIFIER);
2239         cpufreq_register_notifier(&fbi->freq_policy,
2240                                 CPUFREQ_POLICY_NOTIFIER);
2241 #endif
2242
2243         /*
2244          * Ok, now enable the LCD controller
2245          */
2246         set_ctrlr_state(fbi, C_ENABLE);
2247
2248         return 0;
2249
2250 failed_free_cmap:
2251         if (fbi->fb.cmap.len)
2252                 fb_dealloc_cmap(&fbi->fb.cmap);
2253 failed_free_irq:
2254         free_irq(irq, fbi);
2255 failed_free_mem:
2256         free_pages_exact(fbi->video_mem, fbi->video_mem_size);
2257 failed_free_dma:
2258         dma_free_coherent(&dev->dev, fbi->dma_buff_size,
2259                         fbi->dma_buff, fbi->dma_buff_phys);
2260 failed_free_io:
2261         iounmap(fbi->mmio_base);
2262 failed_free_res:
2263         release_mem_region(r->start, resource_size(r));
2264 failed_fbi:
2265         clk_put(fbi->clk);
2266         platform_set_drvdata(dev, NULL);
2267         kfree(fbi);
2268 failed:
2269         return ret;
2270 }
2271
2272 static int __devexit pxafb_remove(struct platform_device *dev)
2273 {
2274         struct pxafb_info *fbi = platform_get_drvdata(dev);
2275         struct resource *r;
2276         int irq;
2277         struct fb_info *info;
2278
2279         if (!fbi)
2280                 return 0;
2281
2282         info = &fbi->fb;
2283
2284         pxafb_overlay_exit(fbi);
2285         unregister_framebuffer(info);
2286
2287         pxafb_disable_controller(fbi);
2288
2289         if (fbi->fb.cmap.len)
2290                 fb_dealloc_cmap(&fbi->fb.cmap);
2291
2292         irq = platform_get_irq(dev, 0);
2293         free_irq(irq, fbi);
2294
2295         free_pages_exact(fbi->video_mem, fbi->video_mem_size);
2296
2297         dma_free_writecombine(&dev->dev, fbi->dma_buff_size,
2298                         fbi->dma_buff, fbi->dma_buff_phys);
2299
2300         iounmap(fbi->mmio_base);
2301
2302         r = platform_get_resource(dev, IORESOURCE_MEM, 0);
2303         release_mem_region(r->start, resource_size(r));
2304
2305         clk_put(fbi->clk);
2306         kfree(fbi);
2307
2308         return 0;
2309 }
2310
2311 static struct platform_driver pxafb_driver = {
2312         .probe          = pxafb_probe,
2313         .remove         = __devexit_p(pxafb_remove),
2314         .driver         = {
2315                 .owner  = THIS_MODULE,
2316                 .name   = "pxa2xx-fb",
2317 #ifdef CONFIG_PM
2318                 .pm     = &pxafb_pm_ops,
2319 #endif
2320         },
2321 };
2322
2323 static int __init pxafb_init(void)
2324 {
2325         if (pxafb_setup_options())
2326                 return -EINVAL;
2327
2328         return platform_driver_register(&pxafb_driver);
2329 }
2330
2331 static void __exit pxafb_exit(void)
2332 {
2333         platform_driver_unregister(&pxafb_driver);
2334 }
2335
2336 module_init(pxafb_init);
2337 module_exit(pxafb_exit);
2338
2339 MODULE_DESCRIPTION("loadable framebuffer driver for PXA");
2340 MODULE_LICENSE("GPL");