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bridge: Pull ip header into skb->data before looking into ip header.
[linux/fpc-iii.git] / drivers / video / s1d13xxxfb.c
blob28b1c6c3d8ac98054ca2aad04021d4107cd01662
1 /* drivers/video/s1d13xxxfb.c
2 *
3 * (c) 2004 Simtec Electronics
4 * (c) 2005 Thibaut VARENE <varenet@parisc-linux.org>
5 * (c) 2009 Kristoffer Ericson <kristoffer.ericson@gmail.com>
6 *
7 * Driver for Epson S1D13xxx series framebuffer chips
8 *
9 * Adapted from
10 * linux/drivers/video/skeletonfb.c
11 * linux/drivers/video/epson1355fb.c
12 * linux/drivers/video/epson/s1d13xxxfb.c (2.4 driver by Epson)
13 *
14 * TODO: - handle dual screen display (CRT and LCD at the same time).
15 * - check_var(), mode change, etc.
16 * - probably not SMP safe :)
17 * - support all bitblt operations on all cards
18 *
19 * This file is subject to the terms and conditions of the GNU General Public
20 * License. See the file COPYING in the main directory of this archive for
21 * more details.
22 */
23
24 #include <linux/module.h>
25 #include <linux/platform_device.h>
26 #include <linux/delay.h>
27 #include <linux/types.h>
28 #include <linux/errno.h>
29 #include <linux/mm.h>
30 #include <linux/mman.h>
31 #include <linux/fb.h>
32 #include <linux/spinlock_types.h>
33 #include <linux/spinlock.h>
34 #include <linux/slab.h>
35
36 #include <asm/io.h>
37
38 #include <video/s1d13xxxfb.h>
39
40 #define PFX "s1d13xxxfb: "
41 #define BLIT "s1d13xxxfb_bitblt: "
42
43 /*
44 * set this to enable debugging on general functions
45 */
46 #if 0
47 #define dbg(fmt, args...) do { printk(KERN_INFO fmt, ## args); } while(0)
48 #else
49 #define dbg(fmt, args...) do { } while (0)
50 #endif
51
52 /*
53 * set this to enable debugging on 2D acceleration
54 */
55 #if 0
56 #define dbg_blit(fmt, args...) do { printk(KERN_INFO BLIT fmt, ## args); } while (0)
57 #else
58 #define dbg_blit(fmt, args...) do { } while (0)
59 #endif
60
61 /*
62 * we make sure only one bitblt operation is running
63 */
64 static DEFINE_SPINLOCK(s1d13xxxfb_bitblt_lock);
65
66 /*
67 * list of card production ids
68 */
69 static const int s1d13xxxfb_prod_ids[] = {
70 S1D13505_PROD_ID,
71 S1D13506_PROD_ID,
72 S1D13806_PROD_ID,
73 };
74
75 /*
76 * List of card strings
77 */
78 static const char *s1d13xxxfb_prod_names[] = {
79 "S1D13505",
80 "S1D13506",
81 "S1D13806",
82 };
83
84 /*
85 * here we define the default struct fb_fix_screeninfo
86 */
87 static struct fb_fix_screeninfo __devinitdata s1d13xxxfb_fix = {
88 .id = S1D_FBID,
89 .type = FB_TYPE_PACKED_PIXELS,
90 .visual = FB_VISUAL_PSEUDOCOLOR,
91 .xpanstep = 0,
92 .ypanstep = 1,
93 .ywrapstep = 0,
94 .accel = FB_ACCEL_NONE,
95 };
96
97 static inline u8
98 s1d13xxxfb_readreg(struct s1d13xxxfb_par *par, u16 regno)
99 {
100 #if defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_OPSPUT) || defined(CONFIG_PLAT_MAPPI3)
101 regno=((regno & 1) ? (regno & ~1L) : (regno + 1));
102 #endif
103 return readb(par->regs + regno);
104 }
105
106 static inline void
107 s1d13xxxfb_writereg(struct s1d13xxxfb_par *par, u16 regno, u8 value)
108 {
109 #if defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_OPSPUT) || defined(CONFIG_PLAT_MAPPI3)
110 regno=((regno & 1) ? (regno & ~1L) : (regno + 1));
111 #endif
112 writeb(value, par->regs + regno);
113 }
114
115 static inline void
116 s1d13xxxfb_runinit(struct s1d13xxxfb_par *par,
117 const struct s1d13xxxfb_regval *initregs,
118 const unsigned int size)
119 {
120 int i;
121
122 for (i = 0; i < size; i++) {
123 if ((initregs[i].addr == S1DREG_DELAYOFF) ||
124 (initregs[i].addr == S1DREG_DELAYON))
125 mdelay((int)initregs[i].value);
126 else {
127 s1d13xxxfb_writereg(par, initregs[i].addr, initregs[i].value);
128 }
129 }
130
131 /* make sure the hardware can cope with us */
132 mdelay(1);
133 }
134
135 static inline void
136 lcd_enable(struct s1d13xxxfb_par *par, int enable)
137 {
138 u8 mode = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
139
140 if (enable)
141 mode |= 0x01;
142 else
143 mode &= ~0x01;
144
145 s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, mode);
146 }
147
148 static inline void
149 crt_enable(struct s1d13xxxfb_par *par, int enable)
150 {
151 u8 mode = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
152
153 if (enable)
154 mode |= 0x02;
155 else
156 mode &= ~0x02;
157
158 s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, mode);
159 }
160
161
162 /*************************************************************
163 framebuffer control functions
164 *************************************************************/
165 static inline void
166 s1d13xxxfb_setup_pseudocolour(struct fb_info *info)
167 {
168 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
169
170 info->var.red.length = 4;
171 info->var.green.length = 4;
172 info->var.blue.length = 4;
173 }
174
175 static inline void
176 s1d13xxxfb_setup_truecolour(struct fb_info *info)
177 {
178 info->fix.visual = FB_VISUAL_TRUECOLOR;
179 info->var.bits_per_pixel = 16;
180
181 info->var.red.length = 5;
182 info->var.red.offset = 11;
183
184 info->var.green.length = 6;
185 info->var.green.offset = 5;
186
187 info->var.blue.length = 5;
188 info->var.blue.offset = 0;
189 }
190
191 /**
192 * s1d13xxxfb_set_par - Alters the hardware state.
193 * @info: frame buffer structure
194 *
195 * Using the fb_var_screeninfo in fb_info we set the depth of the
196 * framebuffer. This function alters the par AND the
197 * fb_fix_screeninfo stored in fb_info. It doesn't not alter var in
198 * fb_info since we are using that data. This means we depend on the
199 * data in var inside fb_info to be supported by the hardware.
200 * xxxfb_check_var is always called before xxxfb_set_par to ensure this.
201 *
202 * XXX TODO: write proper s1d13xxxfb_check_var(), without which that
203 * function is quite useless.
204 */
205 static int
206 s1d13xxxfb_set_par(struct fb_info *info)
207 {
208 struct s1d13xxxfb_par *s1dfb = info->par;
209 unsigned int val;
210
211 dbg("s1d13xxxfb_set_par: bpp=%d\n", info->var.bits_per_pixel);
212
213 if ((s1dfb->display & 0x01)) /* LCD */
214 val = s1d13xxxfb_readreg(s1dfb, S1DREG_LCD_DISP_MODE); /* read colour control */
215 else /* CRT */
216 val = s1d13xxxfb_readreg(s1dfb, S1DREG_CRT_DISP_MODE); /* read colour control */
217
218 val &= ~0x07;
219
220 switch (info->var.bits_per_pixel) {
221 case 4:
222 dbg("pseudo colour 4\n");
223 s1d13xxxfb_setup_pseudocolour(info);
224 val |= 2;
225 break;
226 case 8:
227 dbg("pseudo colour 8\n");
228 s1d13xxxfb_setup_pseudocolour(info);
229 val |= 3;
230 break;
231 case 16:
232 dbg("true colour\n");
233 s1d13xxxfb_setup_truecolour(info);
234 val |= 5;
235 break;
236
237 default:
238 dbg("bpp not supported!\n");
239 return -EINVAL;
240 }
241
242 dbg("writing %02x to display mode register\n", val);
243
244 if ((s1dfb->display & 0x01)) /* LCD */
245 s1d13xxxfb_writereg(s1dfb, S1DREG_LCD_DISP_MODE, val);
246 else /* CRT */
247 s1d13xxxfb_writereg(s1dfb, S1DREG_CRT_DISP_MODE, val);
248
249 info->fix.line_length = info->var.xres * info->var.bits_per_pixel;
250 info->fix.line_length /= 8;
251
252 dbg("setting line_length to %d\n", info->fix.line_length);
253
254 dbg("done setup\n");
255
256 return 0;
257 }
258
259 /**
260 * s1d13xxxfb_setcolreg - sets a color register.
261 * @regno: Which register in the CLUT we are programming
262 * @red: The red value which can be up to 16 bits wide
263 * @green: The green value which can be up to 16 bits wide
264 * @blue: The blue value which can be up to 16 bits wide.
265 * @transp: If supported the alpha value which can be up to 16 bits wide.
266 * @info: frame buffer info structure
267 *
268 * Returns negative errno on error, or zero on success.
269 */
270 static int
271 s1d13xxxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
272 u_int transp, struct fb_info *info)
273 {
274 struct s1d13xxxfb_par *s1dfb = info->par;
275 unsigned int pseudo_val;
276
277 if (regno >= S1D_PALETTE_SIZE)
278 return -EINVAL;
279
280 dbg("s1d13xxxfb_setcolreg: %d: rgb=%d,%d,%d, tr=%d\n",
281 regno, red, green, blue, transp);
282
283 if (info->var.grayscale)
284 red = green = blue = (19595*red + 38470*green + 7471*blue) >> 16;
285
286 switch (info->fix.visual) {
287 case FB_VISUAL_TRUECOLOR:
288 if (regno >= 16)
289 return -EINVAL;
290
291 /* deal with creating pseudo-palette entries */
292
293 pseudo_val = (red >> 11) << info->var.red.offset;
294 pseudo_val |= (green >> 10) << info->var.green.offset;
295 pseudo_val |= (blue >> 11) << info->var.blue.offset;
296
297 dbg("s1d13xxxfb_setcolreg: pseudo %d, val %08x\n",
298 regno, pseudo_val);
299
300 #if defined(CONFIG_PLAT_MAPPI)
301 ((u32 *)info->pseudo_palette)[regno] = cpu_to_le16(pseudo_val);
302 #else
303 ((u32 *)info->pseudo_palette)[regno] = pseudo_val;
304 #endif
305
306 break;
307 case FB_VISUAL_PSEUDOCOLOR:
308 s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_ADDR, regno);
309 s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_DATA, red);
310 s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_DATA, green);
311 s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_DATA, blue);
312
313 break;
314 default:
315 return -ENOSYS;
316 }
317
318 dbg("s1d13xxxfb_setcolreg: done\n");
319
320 return 0;
321 }
322
323 /**
324 * s1d13xxxfb_blank - blanks the display.
325 * @blank_mode: the blank mode we want.
326 * @info: frame buffer structure that represents a single frame buffer
327 *
328 * Blank the screen if blank_mode != 0, else unblank. Return 0 if
329 * blanking succeeded, != 0 if un-/blanking failed due to e.g. a
330 * video mode which doesn't support it. Implements VESA suspend
331 * and powerdown modes on hardware that supports disabling hsync/vsync:
332 * blank_mode == 2: suspend vsync
333 * blank_mode == 3: suspend hsync
334 * blank_mode == 4: powerdown
335 *
336 * Returns negative errno on error, or zero on success.
337 */
338 static int
339 s1d13xxxfb_blank(int blank_mode, struct fb_info *info)
340 {
341 struct s1d13xxxfb_par *par = info->par;
342
343 dbg("s1d13xxxfb_blank: blank=%d, info=%p\n", blank_mode, info);
344
345 switch (blank_mode) {
346 case FB_BLANK_UNBLANK:
347 case FB_BLANK_NORMAL:
348 if ((par->display & 0x01) != 0)
349 lcd_enable(par, 1);
350 if ((par->display & 0x02) != 0)
351 crt_enable(par, 1);
352 break;
353 case FB_BLANK_VSYNC_SUSPEND:
354 case FB_BLANK_HSYNC_SUSPEND:
355 break;
356 case FB_BLANK_POWERDOWN:
357 lcd_enable(par, 0);
358 crt_enable(par, 0);
359 break;
360 default:
361 return -EINVAL;
362 }
363
364 /* let fbcon do a soft blank for us */
365 return ((blank_mode == FB_BLANK_NORMAL) ? 1 : 0);
366 }
367
368 /**
369 * s1d13xxxfb_pan_display - Pans the display.
370 * @var: frame buffer variable screen structure
371 * @info: frame buffer structure that represents a single frame buffer
372 *
373 * Pan (or wrap, depending on the `vmode' field) the display using the
374 * `yoffset' field of the `var' structure (`xoffset' not yet supported).
375 * If the values don't fit, return -EINVAL.
376 *
377 * Returns negative errno on error, or zero on success.
378 */
379 static int
380 s1d13xxxfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
381 {
382 struct s1d13xxxfb_par *par = info->par;
383 u32 start;
384
385 if (var->xoffset != 0) /* not yet ... */
386 return -EINVAL;
387
388 if (var->yoffset + info->var.yres > info->var.yres_virtual)
389 return -EINVAL;
390
391 start = (info->fix.line_length >> 1) * var->yoffset;
392
393 if ((par->display & 0x01)) {
394 /* LCD */
395 s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START0, (start & 0xff));
396 s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START1, ((start >> 8) & 0xff));
397 s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START2, ((start >> 16) & 0x0f));
398 } else {
399 /* CRT */
400 s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START0, (start & 0xff));
401 s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START1, ((start >> 8) & 0xff));
402 s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START2, ((start >> 16) & 0x0f));
403 }
404
405 return 0;
406 }
407
408 /************************************************************
409 functions to handle bitblt acceleration
410 ************************************************************/
411
412 /**
413 * bltbit_wait_bitclear - waits for change in register value
414 * @info : frambuffer structure
415 * @bit : value currently in register
416 * @timeout : ...
417 *
418 * waits until value changes FROM bit
419 *
420 */
421 static u8
422 bltbit_wait_bitclear(struct fb_info *info, u8 bit, int timeout)
423 {
424 while (s1d13xxxfb_readreg(info->par, S1DREG_BBLT_CTL0) & bit) {
425 udelay(10);
426 if (!--timeout) {
427 dbg_blit("wait_bitclear timeout\n");
428 break;
429 }
430 }
431
432 return timeout;
433 }
434
435 /*
436 * s1d13xxxfb_bitblt_copyarea - accelerated copyarea function
437 * @info : framebuffer structure
438 * @area : fb_copyarea structure
439 *
440 * supports (atleast) S1D13506
441 *
442 */
443 static void
444 s1d13xxxfb_bitblt_copyarea(struct fb_info *info, const struct fb_copyarea *area)
445 {
446 u32 dst, src;
447 u32 stride;
448 u16 reverse = 0;
449 u16 sx = area->sx, sy = area->sy;
450 u16 dx = area->dx, dy = area->dy;
451 u16 width = area->width, height = area->height;
452 u16 bpp;
453
454 spin_lock(&s1d13xxxfb_bitblt_lock);
455
456 /* bytes per xres line */
457 bpp = (info->var.bits_per_pixel >> 3);
458 stride = bpp * info->var.xres;
459
460 /* reverse, calculate the last pixel in rectangle */
461 if ((dy > sy) || ((dy == sy) && (dx >= sx))) {
462 dst = (((dy + height - 1) * stride) + (bpp * (dx + width - 1)));
463 src = (((sy + height - 1) * stride) + (bpp * (sx + width - 1)));
464 reverse = 1;
465 /* not reverse, calculate the first pixel in rectangle */
466 } else { /* (y * xres) + (bpp * x) */
467 dst = (dy * stride) + (bpp * dx);
468 src = (sy * stride) + (bpp * sx);
469 }
470
471 /* set source address */
472 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_SRC_START0, (src & 0xff));
473 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_SRC_START1, (src >> 8) & 0x00ff);
474 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_SRC_START2, (src >> 16) & 0x00ff);
475
476 /* set destination address */
477 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START0, (dst & 0xff));
478 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START1, (dst >> 8) & 0x00ff);
479 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START2, (dst >> 16) & 0x00ff);
480
481 /* program height and width */
482 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_WIDTH0, (width & 0xff) - 1);
483 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_WIDTH1, (width >> 8));
484
485 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_HEIGHT0, (height & 0xff) - 1);
486 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_HEIGHT1, (height >> 8));
487
488 /* negative direction ROP */
489 if (reverse == 1) {
490 dbg_blit("(copyarea) negative rop\n");
491 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_OP, 0x03);
492 } else /* positive direction ROP */ {
493 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_OP, 0x02);
494 dbg_blit("(copyarea) positive rop\n");
495 }
496
497 /* set for rectangel mode and not linear */
498 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL0, 0x0);
499
500 /* setup the bpp 1 = 16bpp, 0 = 8bpp*/
501 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL1, (bpp >> 1));
502
503 /* set words per xres */
504 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_MEM_OFF0, (stride >> 1) & 0xff);
505 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_MEM_OFF1, (stride >> 9));
506
507 dbg_blit("(copyarea) dx=%d, dy=%d\n", dx, dy);
508 dbg_blit("(copyarea) sx=%d, sy=%d\n", sx, sy);
509 dbg_blit("(copyarea) width=%d, height=%d\n", width - 1, height - 1);
510 dbg_blit("(copyarea) stride=%d\n", stride);
511 dbg_blit("(copyarea) bpp=%d=0x0%d, mem_offset1=%d, mem_offset2=%d\n", bpp, (bpp >> 1),
512 (stride >> 1) & 0xff, stride >> 9);
513
514 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CC_EXP, 0x0c);
515
516 /* initialize the engine */
517 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL0, 0x80);
518
519 /* wait to complete */
520 bltbit_wait_bitclear(info, 0x80, 8000);
521
522 spin_unlock(&s1d13xxxfb_bitblt_lock);
523 }
524
525 /**
526 *
527 * s1d13xxxfb_bitblt_solidfill - accelerated solidfill function
528 * @info : framebuffer structure
529 * @rect : fb_fillrect structure
530 *
531 * supports (atleast 13506)
532 *
533 **/
534 static void
535 s1d13xxxfb_bitblt_solidfill(struct fb_info *info, const struct fb_fillrect *rect)
536 {
537 u32 screen_stride, dest;
538 u32 fg;
539 u16 bpp = (info->var.bits_per_pixel >> 3);
540
541 /* grab spinlock */
542 spin_lock(&s1d13xxxfb_bitblt_lock);
543
544 /* bytes per x width */
545 screen_stride = (bpp * info->var.xres);
546
547 /* bytes to starting point */
548 dest = ((rect->dy * screen_stride) + (bpp * rect->dx));
549
550 dbg_blit("(solidfill) dx=%d, dy=%d, stride=%d, dest=%d\n"
551 "(solidfill) : rect_width=%d, rect_height=%d\n",
552 rect->dx, rect->dy, screen_stride, dest,
553 rect->width - 1, rect->height - 1);
554
555 dbg_blit("(solidfill) : xres=%d, yres=%d, bpp=%d\n",
556 info->var.xres, info->var.yres,
557 info->var.bits_per_pixel);
558 dbg_blit("(solidfill) : rop=%d\n", rect->rop);
559
560 /* We split the destination into the three registers */
561 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START0, (dest & 0x00ff));
562 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START1, ((dest >> 8) & 0x00ff));
563 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START2, ((dest >> 16) & 0x00ff));
564
565 /* give information regarding rectangel width */
566 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_WIDTH0, ((rect->width) & 0x00ff) - 1);
567 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_WIDTH1, (rect->width >> 8));
568
569 /* give information regarding rectangel height */
570 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_HEIGHT0, ((rect->height) & 0x00ff) - 1);
571 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_HEIGHT1, (rect->height >> 8));
572
573 if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
574 info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
575 fg = ((u32 *)info->pseudo_palette)[rect->color];
576 dbg_blit("(solidfill) truecolor/directcolor\n");
577 dbg_blit("(solidfill) pseudo_palette[%d] = %d\n", rect->color, fg);
578 } else {
579 fg = rect->color;
580 dbg_blit("(solidfill) color = %d\n", rect->color);
581 }
582
583 /* set foreground color */
584 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_FGC0, (fg & 0xff));
585 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_FGC1, (fg >> 8) & 0xff);
586
587 /* set rectangual region of memory (rectangle and not linear) */
588 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL0, 0x0);
589
590 /* set operation mode SOLID_FILL */
591 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_OP, BBLT_SOLID_FILL);
592
593 /* set bits per pixel (1 = 16bpp, 0 = 8bpp) */
594 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL1, (info->var.bits_per_pixel >> 4));
595
596 /* set the memory offset for the bblt in word sizes */
597 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_MEM_OFF0, (screen_stride >> 1) & 0x00ff);
598 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_MEM_OFF1, (screen_stride >> 9));
599
600 /* and away we go.... */
601 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL0, 0x80);
602
603 /* wait until its done */
604 bltbit_wait_bitclear(info, 0x80, 8000);
605
606 /* let others play */
607 spin_unlock(&s1d13xxxfb_bitblt_lock);
608 }
609
610 /* framebuffer information structures */
611 static struct fb_ops s1d13xxxfb_fbops = {
612 .owner = THIS_MODULE,
613 .fb_set_par = s1d13xxxfb_set_par,
614 .fb_setcolreg = s1d13xxxfb_setcolreg,
615 .fb_blank = s1d13xxxfb_blank,
616
617 .fb_pan_display = s1d13xxxfb_pan_display,
618
619 /* gets replaced at chip detection time */
620 .fb_fillrect = cfb_fillrect,
621 .fb_copyarea = cfb_copyarea,
622 .fb_imageblit = cfb_imageblit,
623 };
624
625 static int s1d13xxxfb_width_tab[2][4] __devinitdata = {
626 {4, 8, 16, -1},
627 {9, 12, 18, -1},
628 };
629
630 /**
631 * s1d13xxxfb_fetch_hw_state - Configure the framebuffer according to
632 * hardware setup.
633 * @info: frame buffer structure
634 *
635 * We setup the framebuffer structures according to the current
636 * hardware setup. On some machines, the BIOS will have filled
637 * the chip registers with such info, on others, these values will
638 * have been written in some init procedure. In any case, the
639 * software values needs to match the hardware ones. This is what
640 * this function ensures.
641 *
642 * Note: some of the hardcoded values here might need some love to
643 * work on various chips, and might need to no longer be hardcoded.
644 */
645 static void __devinit
646 s1d13xxxfb_fetch_hw_state(struct fb_info *info)
647 {
648 struct fb_var_screeninfo *var = &info->var;
649 struct fb_fix_screeninfo *fix = &info->fix;
650 struct s1d13xxxfb_par *par = info->par;
651 u8 panel, display;
652 u16 offset;
653 u32 xres, yres;
654 u32 xres_virtual, yres_virtual;
655 int bpp, lcd_bpp;
656 int is_color, is_dual, is_tft;
657 int lcd_enabled, crt_enabled;
658
659 fix->type = FB_TYPE_PACKED_PIXELS;
660
661 /* general info */
662 par->display = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
663 crt_enabled = (par->display & 0x02) != 0;
664 lcd_enabled = (par->display & 0x01) != 0;
665
666 if (lcd_enabled && crt_enabled)
667 printk(KERN_WARNING PFX "Warning: LCD and CRT detected, using LCD\n");
668
669 if (lcd_enabled)
670 display = s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_MODE);
671 else /* CRT */
672 display = s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_MODE);
673
674 bpp = display & 0x07;
675
676 switch (bpp) {
677 case 2: /* 4 bpp */
678 case 3: /* 8 bpp */
679 var->bits_per_pixel = 8;
680 var->red.offset = var->green.offset = var->blue.offset = 0;
681 var->red.length = var->green.length = var->blue.length = 8;
682 break;
683 case 5: /* 16 bpp */
684 s1d13xxxfb_setup_truecolour(info);
685 break;
686 default:
687 dbg("bpp: %i\n", bpp);
688 }
689 fb_alloc_cmap(&info->cmap, 256, 0);
690
691 /* LCD info */
692 panel = s1d13xxxfb_readreg(par, S1DREG_PANEL_TYPE);
693 is_color = (panel & 0x04) != 0;
694 is_dual = (panel & 0x02) != 0;
695 is_tft = (panel & 0x01) != 0;
696 lcd_bpp = s1d13xxxfb_width_tab[is_tft][(panel >> 4) & 3];
697
698 if (lcd_enabled) {
699 xres = (s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_HWIDTH) + 1) * 8;
700 yres = (s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_VHEIGHT0) +
701 ((s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_VHEIGHT1) & 0x03) << 8) + 1);
702
703 offset = (s1d13xxxfb_readreg(par, S1DREG_LCD_MEM_OFF0) +
704 ((s1d13xxxfb_readreg(par, S1DREG_LCD_MEM_OFF1) & 0x7) << 8));
705 } else { /* crt */
706 xres = (s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_HWIDTH) + 1) * 8;
707 yres = (s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_VHEIGHT0) +
708 ((s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_VHEIGHT1) & 0x03) << 8) + 1);
709
710 offset = (s1d13xxxfb_readreg(par, S1DREG_CRT_MEM_OFF0) +
711 ((s1d13xxxfb_readreg(par, S1DREG_CRT_MEM_OFF1) & 0x7) << 8));
712 }
713 xres_virtual = offset * 16 / var->bits_per_pixel;
714 yres_virtual = fix->smem_len / (offset * 2);
715
716 var->xres = xres;
717 var->yres = yres;
718 var->xres_virtual = xres_virtual;
719 var->yres_virtual = yres_virtual;
720 var->xoffset = var->yoffset = 0;
721
722 fix->line_length = offset * 2;
723
724 var->grayscale = !is_color;
725
726 var->activate = FB_ACTIVATE_NOW;
727
728 dbg(PFX "bpp=%d, lcd_bpp=%d, "
729 "crt_enabled=%d, lcd_enabled=%d\n",
730 var->bits_per_pixel, lcd_bpp, crt_enabled, lcd_enabled);
731 dbg(PFX "xres=%d, yres=%d, vxres=%d, vyres=%d "
732 "is_color=%d, is_dual=%d, is_tft=%d\n",
733 xres, yres, xres_virtual, yres_virtual, is_color, is_dual, is_tft);
734 }
735
736
737 static int
738 s1d13xxxfb_remove(struct platform_device *pdev)
739 {
740 struct fb_info *info = platform_get_drvdata(pdev);
741 struct s1d13xxxfb_par *par = NULL;
742
743 if (info) {
744 par = info->par;
745 if (par && par->regs) {
746 /* disable output & enable powersave */
747 s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, 0x00);
748 s1d13xxxfb_writereg(par, S1DREG_PS_CNF, 0x11);
749 iounmap(par->regs);
750 }
751
752 fb_dealloc_cmap(&info->cmap);
753
754 if (info->screen_base)
755 iounmap(info->screen_base);
756
757 framebuffer_release(info);
758 }
759
760 release_mem_region(pdev->resource[0].start,
761 pdev->resource[0].end - pdev->resource[0].start +1);
762 release_mem_region(pdev->resource[1].start,
763 pdev->resource[1].end - pdev->resource[1].start +1);
764 return 0;
765 }
766
767 static int __devinit
768 s1d13xxxfb_probe(struct platform_device *pdev)
769 {
770 struct s1d13xxxfb_par *default_par;
771 struct fb_info *info;
772 struct s1d13xxxfb_pdata *pdata = NULL;
773 int ret = 0;
774 int i;
775 u8 revision, prod_id;
776
777 dbg("probe called: device is %p\n", pdev);
778
779 printk(KERN_INFO "Epson S1D13XXX FB Driver\n");
780
781 /* enable platform-dependent hardware glue, if any */
782 if (pdev->dev.platform_data)
783 pdata = pdev->dev.platform_data;
784
785 if (pdata && pdata->platform_init_video)
786 pdata->platform_init_video();
787
788 if (pdev->num_resources != 2) {
789 dev_err(&pdev->dev, "invalid num_resources: %i\n",
790 pdev->num_resources);
791 ret = -ENODEV;
792 goto bail;
793 }
794
795 /* resource[0] is VRAM, resource[1] is registers */
796 if (pdev->resource[0].flags != IORESOURCE_MEM
797 || pdev->resource[1].flags != IORESOURCE_MEM) {
798 dev_err(&pdev->dev, "invalid resource type\n");
799 ret = -ENODEV;
800 goto bail;
801 }
802
803 if (!request_mem_region(pdev->resource[0].start,
804 pdev->resource[0].end - pdev->resource[0].start +1, "s1d13xxxfb mem")) {
805 dev_dbg(&pdev->dev, "request_mem_region failed\n");
806 ret = -EBUSY;
807 goto bail;
808 }
809
810 if (!request_mem_region(pdev->resource[1].start,
811 pdev->resource[1].end - pdev->resource[1].start +1, "s1d13xxxfb regs")) {
812 dev_dbg(&pdev->dev, "request_mem_region failed\n");
813 ret = -EBUSY;
814 goto bail;
815 }
816
817 info = framebuffer_alloc(sizeof(struct s1d13xxxfb_par) + sizeof(u32) * 256, &pdev->dev);
818 if (!info) {
819 ret = -ENOMEM;
820 goto bail;
821 }
822
823 platform_set_drvdata(pdev, info);
824 default_par = info->par;
825 default_par->regs = ioremap_nocache(pdev->resource[1].start,
826 pdev->resource[1].end - pdev->resource[1].start +1);
827 if (!default_par->regs) {
828 printk(KERN_ERR PFX "unable to map registers\n");
829 ret = -ENOMEM;
830 goto bail;
831 }
832 info->pseudo_palette = default_par->pseudo_palette;
833
834 info->screen_base = ioremap_nocache(pdev->resource[0].start,
835 pdev->resource[0].end - pdev->resource[0].start +1);
836
837 if (!info->screen_base) {
838 printk(KERN_ERR PFX "unable to map framebuffer\n");
839 ret = -ENOMEM;
840 goto bail;
841 }
842
843 /* production id is top 6 bits */
844 prod_id = s1d13xxxfb_readreg(default_par, S1DREG_REV_CODE) >> 2;
845 /* revision id is lower 2 bits */
846 revision = s1d13xxxfb_readreg(default_par, S1DREG_REV_CODE) & 0x3;
847 ret = -ENODEV;
848
849 for (i = 0; i < ARRAY_SIZE(s1d13xxxfb_prod_ids); i++) {
850 if (prod_id == s1d13xxxfb_prod_ids[i]) {
851 /* looks like we got it in our list */
852 default_par->prod_id = prod_id;
853 default_par->revision = revision;
854 ret = 0;
855 break;
856 }
857 }
858
859 if (!ret) {
860 printk(KERN_INFO PFX "chip production id %i = %s\n",
861 prod_id, s1d13xxxfb_prod_names[i]);
862 printk(KERN_INFO PFX "chip revision %i\n", revision);
863 } else {
864 printk(KERN_INFO PFX
865 "unknown chip production id %i, revision %i\n",
866 prod_id, revision);
867 printk(KERN_INFO PFX "please contant maintainer\n");
868 goto bail;
869 }
870
871 info->fix = s1d13xxxfb_fix;
872 info->fix.mmio_start = pdev->resource[1].start;
873 info->fix.mmio_len = pdev->resource[1].end - pdev->resource[1].start + 1;
874 info->fix.smem_start = pdev->resource[0].start;
875 info->fix.smem_len = pdev->resource[0].end - pdev->resource[0].start + 1;
876
877 printk(KERN_INFO PFX "regs mapped at 0x%p, fb %d KiB mapped at 0x%p\n",
878 default_par->regs, info->fix.smem_len / 1024, info->screen_base);
879
880 info->par = default_par;
881 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
882 info->fbops = &s1d13xxxfb_fbops;
883
884 switch(prod_id) {
885 case S1D13506_PROD_ID: /* activate acceleration */
886 s1d13xxxfb_fbops.fb_fillrect = s1d13xxxfb_bitblt_solidfill;
887 s1d13xxxfb_fbops.fb_copyarea = s1d13xxxfb_bitblt_copyarea;
888 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN |
889 FBINFO_HWACCEL_FILLRECT | FBINFO_HWACCEL_COPYAREA;
890 break;
891 default:
892 break;
893 }
894
895 /* perform "manual" chip initialization, if needed */
896 if (pdata && pdata->initregs)
897 s1d13xxxfb_runinit(info->par, pdata->initregs, pdata->initregssize);
898
899 s1d13xxxfb_fetch_hw_state(info);
900
901 if (register_framebuffer(info) < 0) {
902 ret = -EINVAL;
903 goto bail;
904 }
905
906 printk(KERN_INFO "fb%d: %s frame buffer device\n",
907 info->node, info->fix.id);
908
909 return 0;
910
911 bail:
912 s1d13xxxfb_remove(pdev);
913 return ret;
914
915 }
916
917 #ifdef CONFIG_PM
918 static int s1d13xxxfb_suspend(struct platform_device *dev, pm_message_t state)
919 {
920 struct fb_info *info = platform_get_drvdata(dev);
921 struct s1d13xxxfb_par *s1dfb = info->par;
922 struct s1d13xxxfb_pdata *pdata = NULL;
923
924 /* disable display */
925 lcd_enable(s1dfb, 0);
926 crt_enable(s1dfb, 0);
927
928 if (dev->dev.platform_data)
929 pdata = dev->dev.platform_data;
930
931 #if 0
932 if (!s1dfb->disp_save)
933 s1dfb->disp_save = kmalloc(info->fix.smem_len, GFP_KERNEL);
934
935 if (!s1dfb->disp_save) {
936 printk(KERN_ERR PFX "no memory to save screen");
937 return -ENOMEM;
938 }
939
940 memcpy_fromio(s1dfb->disp_save, info->screen_base, info->fix.smem_len);
941 #else
942 s1dfb->disp_save = NULL;
943 #endif
944
945 if (!s1dfb->regs_save)
946 s1dfb->regs_save = kmalloc(info->fix.mmio_len, GFP_KERNEL);
947
948 if (!s1dfb->regs_save) {
949 printk(KERN_ERR PFX "no memory to save registers");
950 return -ENOMEM;
951 }
952
953 /* backup all registers */
954 memcpy_fromio(s1dfb->regs_save, s1dfb->regs, info->fix.mmio_len);
955
956 /* now activate power save mode */
957 s1d13xxxfb_writereg(s1dfb, S1DREG_PS_CNF, 0x11);
958
959 if (pdata && pdata->platform_suspend_video)
960 return pdata->platform_suspend_video();
961 else
962 return 0;
963 }
964
965 static int s1d13xxxfb_resume(struct platform_device *dev)
966 {
967 struct fb_info *info = platform_get_drvdata(dev);
968 struct s1d13xxxfb_par *s1dfb = info->par;
969 struct s1d13xxxfb_pdata *pdata = NULL;
970
971 /* awaken the chip */
972 s1d13xxxfb_writereg(s1dfb, S1DREG_PS_CNF, 0x10);
973
974 /* do not let go until SDRAM "wakes up" */
975 while ((s1d13xxxfb_readreg(s1dfb, S1DREG_PS_STATUS) & 0x01))
976 udelay(10);
977
978 if (dev->dev.platform_data)
979 pdata = dev->dev.platform_data;
980
981 if (s1dfb->regs_save) {
982 /* will write RO regs, *should* get away with it :) */
983 memcpy_toio(s1dfb->regs, s1dfb->regs_save, info->fix.mmio_len);
984 kfree(s1dfb->regs_save);
985 }
986
987 if (s1dfb->disp_save) {
988 memcpy_toio(info->screen_base, s1dfb->disp_save,
989 info->fix.smem_len);
990 kfree(s1dfb->disp_save); /* XXX kmalloc()'d when? */
991 }
992
993 if ((s1dfb->display & 0x01) != 0)
994 lcd_enable(s1dfb, 1);
995 if ((s1dfb->display & 0x02) != 0)
996 crt_enable(s1dfb, 1);
997
998 if (pdata && pdata->platform_resume_video)
999 return pdata->platform_resume_video();
1000 else
1001 return 0;
1002 }
1003 #endif /* CONFIG_PM */
1004
1005 static struct platform_driver s1d13xxxfb_driver = {
1006 .probe = s1d13xxxfb_probe,
1007 .remove = s1d13xxxfb_remove,
1008 #ifdef CONFIG_PM
1009 .suspend = s1d13xxxfb_suspend,
1010 .resume = s1d13xxxfb_resume,
1011 #endif
1012 .driver = {
1013 .name = S1D_DEVICENAME,
1014 },
1015 };
1016
1017
1018 static int __init
1019 s1d13xxxfb_init(void)
1020 {
1021
1022 #ifndef MODULE
1023 if (fb_get_options("s1d13xxxfb", NULL))
1024 return -ENODEV;
1025 #endif
1026
1027 return platform_driver_register(&s1d13xxxfb_driver);
1028 }
1029
1030
1031 static void __exit
1032 s1d13xxxfb_exit(void)
1033 {
1034 platform_driver_unregister(&s1d13xxxfb_driver);
1035 }
1036
1037 module_init(s1d13xxxfb_init);
1038 module_exit(s1d13xxxfb_exit);
1039
1040
1041 MODULE_LICENSE("GPL");
1042 MODULE_DESCRIPTION("Framebuffer driver for S1D13xxx devices");
1043 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>, Thibaut VARENE <varenet@parisc-linux.org>");
Linux with added FPC-III support