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PCI: Fix oops in pci_vpd_truncate
[linux-2.6/mini2440.git] / drivers / video / s1d13xxxfb.c
blob0726aecf3b7e084c87f6abdc66ca44f4c16cb631
1 /* drivers/video/s1d13xxxfb.c
2 *
3 * (c) 2004 Simtec Electronics
4 * (c) 2005 Thibaut VARENE <varenet@parisc-linux.org>
5 *
6 * Driver for Epson S1D13xxx series framebuffer chips
7 *
8 * Adapted from
9 * linux/drivers/video/skeletonfb.c
10 * linux/drivers/video/epson1355fb.c
11 * linux/drivers/video/epson/s1d13xxxfb.c (2.4 driver by Epson)
12 *
13 * Note, currently only tested on S1D13806 with 16bit CRT.
14 * As such, this driver might still contain some hardcoded bits relating to
15 * S1D13806.
16 * Making it work on other S1D13XXX chips should merely be a matter of adding
17 * a few switch()s, some missing glue here and there maybe, and split header
18 * files.
19 *
20 * TODO: - handle dual screen display (CRT and LCD at the same time).
21 * - check_var(), mode change, etc.
22 * - PM untested.
23 * - Accelerated interfaces.
24 * - Probably not SMP safe :)
25 *
26 * This file is subject to the terms and conditions of the GNU General Public
27 * License. See the file COPYING in the main directory of this archive for
28 * more details.
29 */
30
31 #include <linux/module.h>
32 #include <linux/platform_device.h>
33 #include <linux/delay.h>
34
35 #include <linux/types.h>
36 #include <linux/errno.h>
37 #include <linux/mm.h>
38 #include <linux/mman.h>
39 #include <linux/fb.h>
40
41 #include <asm/io.h>
42
43 #include <video/s1d13xxxfb.h>
44
45 #define PFX "s1d13xxxfb: "
46
47 #if 0
48 #define dbg(fmt, args...) do { printk(KERN_INFO fmt, ## args); } while(0)
49 #else
50 #define dbg(fmt, args...) do { } while (0)
51 #endif
52
53 /*
54 * List of card production ids
55 */
56 static const int s1d13xxxfb_prod_ids[] = {
57 S1D13505_PROD_ID,
58 S1D13506_PROD_ID,
59 S1D13806_PROD_ID,
60 };
61
62 /*
63 * List of card strings
64 */
65 static const char *s1d13xxxfb_prod_names[] = {
66 "S1D13505",
67 "S1D13506",
68 "S1D13806",
69 };
70
71 /*
72 * Here we define the default struct fb_fix_screeninfo
73 */
74 static struct fb_fix_screeninfo __devinitdata s1d13xxxfb_fix = {
75 .id = S1D_FBID,
76 .type = FB_TYPE_PACKED_PIXELS,
77 .visual = FB_VISUAL_PSEUDOCOLOR,
78 .xpanstep = 0,
79 .ypanstep = 1,
80 .ywrapstep = 0,
81 .accel = FB_ACCEL_NONE,
82 };
83
84 static inline u8
85 s1d13xxxfb_readreg(struct s1d13xxxfb_par *par, u16 regno)
86 {
87 #if defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_OPSPUT) || defined(CONFIG_PLAT_MAPPI3)
88 regno=((regno & 1) ? (regno & ~1L) : (regno + 1));
89 #endif
90 return readb(par->regs + regno);
91 }
92
93 static inline void
94 s1d13xxxfb_writereg(struct s1d13xxxfb_par *par, u16 regno, u8 value)
95 {
96 #if defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_OPSPUT) || defined(CONFIG_PLAT_MAPPI3)
97 regno=((regno & 1) ? (regno & ~1L) : (regno + 1));
98 #endif
99 writeb(value, par->regs + regno);
100 }
101
102 static inline void
103 s1d13xxxfb_runinit(struct s1d13xxxfb_par *par,
104 const struct s1d13xxxfb_regval *initregs,
105 const unsigned int size)
106 {
107 int i;
108
109 for (i = 0; i < size; i++) {
110 if ((initregs[i].addr == S1DREG_DELAYOFF) ||
111 (initregs[i].addr == S1DREG_DELAYON))
112 mdelay((int)initregs[i].value);
113 else {
114 s1d13xxxfb_writereg(par, initregs[i].addr, initregs[i].value);
115 }
116 }
117
118 /* make sure the hardware can cope with us */
119 mdelay(1);
120 }
121
122 static inline void
123 lcd_enable(struct s1d13xxxfb_par *par, int enable)
124 {
125 u8 mode = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
126
127 if (enable)
128 mode |= 0x01;
129 else
130 mode &= ~0x01;
131
132 s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, mode);
133 }
134
135 static inline void
136 crt_enable(struct s1d13xxxfb_par *par, int enable)
137 {
138 u8 mode = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
139
140 if (enable)
141 mode |= 0x02;
142 else
143 mode &= ~0x02;
144
145 s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, mode);
146 }
147
148 /* framebuffer control routines */
149
150 static inline void
151 s1d13xxxfb_setup_pseudocolour(struct fb_info *info)
152 {
153 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
154
155 info->var.red.length = 4;
156 info->var.green.length = 4;
157 info->var.blue.length = 4;
158 }
159
160 static inline void
161 s1d13xxxfb_setup_truecolour(struct fb_info *info)
162 {
163 info->fix.visual = FB_VISUAL_TRUECOLOR;
164 info->var.bits_per_pixel = 16;
165
166 info->var.red.length = 5;
167 info->var.red.offset = 11;
168
169 info->var.green.length = 6;
170 info->var.green.offset = 5;
171
172 info->var.blue.length = 5;
173 info->var.blue.offset = 0;
174 }
175
176 /**
177 * s1d13xxxfb_set_par - Alters the hardware state.
178 * @info: frame buffer structure
179 *
180 * Using the fb_var_screeninfo in fb_info we set the depth of the
181 * framebuffer. This function alters the par AND the
182 * fb_fix_screeninfo stored in fb_info. It doesn't not alter var in
183 * fb_info since we are using that data. This means we depend on the
184 * data in var inside fb_info to be supported by the hardware.
185 * xxxfb_check_var is always called before xxxfb_set_par to ensure this.
186 *
187 * XXX TODO: write proper s1d13xxxfb_check_var(), without which that
188 * function is quite useless.
189 */
190 static int
191 s1d13xxxfb_set_par(struct fb_info *info)
192 {
193 struct s1d13xxxfb_par *s1dfb = info->par;
194 unsigned int val;
195
196 dbg("s1d13xxxfb_set_par: bpp=%d\n", info->var.bits_per_pixel);
197
198 if ((s1dfb->display & 0x01)) /* LCD */
199 val = s1d13xxxfb_readreg(s1dfb, S1DREG_LCD_DISP_MODE); /* read colour control */
200 else /* CRT */
201 val = s1d13xxxfb_readreg(s1dfb, S1DREG_CRT_DISP_MODE); /* read colour control */
202
203 val &= ~0x07;
204
205 switch (info->var.bits_per_pixel) {
206 case 4:
207 dbg("pseudo colour 4\n");
208 s1d13xxxfb_setup_pseudocolour(info);
209 val |= 2;
210 break;
211 case 8:
212 dbg("pseudo colour 8\n");
213 s1d13xxxfb_setup_pseudocolour(info);
214 val |= 3;
215 break;
216 case 16:
217 dbg("true colour\n");
218 s1d13xxxfb_setup_truecolour(info);
219 val |= 5;
220 break;
221
222 default:
223 dbg("bpp not supported!\n");
224 return -EINVAL;
225 }
226
227 dbg("writing %02x to display mode register\n", val);
228
229 if ((s1dfb->display & 0x01)) /* LCD */
230 s1d13xxxfb_writereg(s1dfb, S1DREG_LCD_DISP_MODE, val);
231 else /* CRT */
232 s1d13xxxfb_writereg(s1dfb, S1DREG_CRT_DISP_MODE, val);
233
234 info->fix.line_length = info->var.xres * info->var.bits_per_pixel;
235 info->fix.line_length /= 8;
236
237 dbg("setting line_length to %d\n", info->fix.line_length);
238
239 dbg("done setup\n");
240
241 return 0;
242 }
243
244 /**
245 * s1d13xxxfb_setcolreg - sets a color register.
246 * @regno: Which register in the CLUT we are programming
247 * @red: The red value which can be up to 16 bits wide
248 * @green: The green value which can be up to 16 bits wide
249 * @blue: The blue value which can be up to 16 bits wide.
250 * @transp: If supported the alpha value which can be up to 16 bits wide.
251 * @info: frame buffer info structure
252 *
253 * Returns negative errno on error, or zero on success.
254 */
255 static int
256 s1d13xxxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
257 u_int transp, struct fb_info *info)
258 {
259 struct s1d13xxxfb_par *s1dfb = info->par;
260 unsigned int pseudo_val;
261
262 if (regno >= S1D_PALETTE_SIZE)
263 return -EINVAL;
264
265 dbg("s1d13xxxfb_setcolreg: %d: rgb=%d,%d,%d, tr=%d\n",
266 regno, red, green, blue, transp);
267
268 if (info->var.grayscale)
269 red = green = blue = (19595*red + 38470*green + 7471*blue) >> 16;
270
271 switch (info->fix.visual) {
272 case FB_VISUAL_TRUECOLOR:
273 if (regno >= 16)
274 return -EINVAL;
275
276 /* deal with creating pseudo-palette entries */
277
278 pseudo_val = (red >> 11) << info->var.red.offset;
279 pseudo_val |= (green >> 10) << info->var.green.offset;
280 pseudo_val |= (blue >> 11) << info->var.blue.offset;
281
282 dbg("s1d13xxxfb_setcolreg: pseudo %d, val %08x\n",
283 regno, pseudo_val);
284
285 #if defined(CONFIG_PLAT_MAPPI)
286 ((u32 *)info->pseudo_palette)[regno] = cpu_to_le16(pseudo_val);
287 #else
288 ((u32 *)info->pseudo_palette)[regno] = pseudo_val;
289 #endif
290
291 break;
292 case FB_VISUAL_PSEUDOCOLOR:
293 s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_ADDR, regno);
294 s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_DATA, red);
295 s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_DATA, green);
296 s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_DATA, blue);
297
298 break;
299 default:
300 return -ENOSYS;
301 }
302
303 dbg("s1d13xxxfb_setcolreg: done\n");
304
305 return 0;
306 }
307
308 /**
309 * s1d13xxxfb_blank - blanks the display.
310 * @blank_mode: the blank mode we want.
311 * @info: frame buffer structure that represents a single frame buffer
312 *
313 * Blank the screen if blank_mode != 0, else unblank. Return 0 if
314 * blanking succeeded, != 0 if un-/blanking failed due to e.g. a
315 * video mode which doesn't support it. Implements VESA suspend
316 * and powerdown modes on hardware that supports disabling hsync/vsync:
317 * blank_mode == 2: suspend vsync
318 * blank_mode == 3: suspend hsync
319 * blank_mode == 4: powerdown
320 *
321 * Returns negative errno on error, or zero on success.
322 */
323 static int
324 s1d13xxxfb_blank(int blank_mode, struct fb_info *info)
325 {
326 struct s1d13xxxfb_par *par = info->par;
327
328 dbg("s1d13xxxfb_blank: blank=%d, info=%p\n", blank_mode, info);
329
330 switch (blank_mode) {
331 case FB_BLANK_UNBLANK:
332 case FB_BLANK_NORMAL:
333 if ((par->display & 0x01) != 0)
334 lcd_enable(par, 1);
335 if ((par->display & 0x02) != 0)
336 crt_enable(par, 1);
337 break;
338 case FB_BLANK_VSYNC_SUSPEND:
339 case FB_BLANK_HSYNC_SUSPEND:
340 break;
341 case FB_BLANK_POWERDOWN:
342 lcd_enable(par, 0);
343 crt_enable(par, 0);
344 break;
345 default:
346 return -EINVAL;
347 }
348
349 /* let fbcon do a soft blank for us */
350 return ((blank_mode == FB_BLANK_NORMAL) ? 1 : 0);
351 }
352
353 /**
354 * s1d13xxxfb_pan_display - Pans the display.
355 * @var: frame buffer variable screen structure
356 * @info: frame buffer structure that represents a single frame buffer
357 *
358 * Pan (or wrap, depending on the `vmode' field) the display using the
359 * `yoffset' field of the `var' structure (`xoffset' not yet supported).
360 * If the values don't fit, return -EINVAL.
361 *
362 * Returns negative errno on error, or zero on success.
363 */
364 static int
365 s1d13xxxfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
366 {
367 struct s1d13xxxfb_par *par = info->par;
368 u32 start;
369
370 if (var->xoffset != 0) /* not yet ... */
371 return -EINVAL;
372
373 if (var->yoffset + info->var.yres > info->var.yres_virtual)
374 return -EINVAL;
375
376 start = (info->fix.line_length >> 1) * var->yoffset;
377
378 if ((par->display & 0x01)) {
379 /* LCD */
380 s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START0, (start & 0xff));
381 s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START1, ((start >> 8) & 0xff));
382 s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START2, ((start >> 16) & 0x0f));
383 } else {
384 /* CRT */
385 s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START0, (start & 0xff));
386 s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START1, ((start >> 8) & 0xff));
387 s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START2, ((start >> 16) & 0x0f));
388 }
389
390 return 0;
391 }
392
393 /* framebuffer information structures */
394
395 static struct fb_ops s1d13xxxfb_fbops = {
396 .owner = THIS_MODULE,
397 .fb_set_par = s1d13xxxfb_set_par,
398 .fb_setcolreg = s1d13xxxfb_setcolreg,
399 .fb_blank = s1d13xxxfb_blank,
400
401 .fb_pan_display = s1d13xxxfb_pan_display,
402
403 /* to be replaced by any acceleration we can */
404 .fb_fillrect = cfb_fillrect,
405 .fb_copyarea = cfb_copyarea,
406 .fb_imageblit = cfb_imageblit,
407 };
408
409 static int s1d13xxxfb_width_tab[2][4] __devinitdata = {
410 {4, 8, 16, -1},
411 {9, 12, 18, -1},
412 };
413
414 /**
415 * s1d13xxxfb_fetch_hw_state - Configure the framebuffer according to
416 * hardware setup.
417 * @info: frame buffer structure
418 *
419 * We setup the framebuffer structures according to the current
420 * hardware setup. On some machines, the BIOS will have filled
421 * the chip registers with such info, on others, these values will
422 * have been written in some init procedure. In any case, the
423 * software values needs to match the hardware ones. This is what
424 * this function ensures.
425 *
426 * Note: some of the hardcoded values here might need some love to
427 * work on various chips, and might need to no longer be hardcoded.
428 */
429 static void __devinit
430 s1d13xxxfb_fetch_hw_state(struct fb_info *info)
431 {
432 struct fb_var_screeninfo *var = &info->var;
433 struct fb_fix_screeninfo *fix = &info->fix;
434 struct s1d13xxxfb_par *par = info->par;
435 u8 panel, display;
436 u16 offset;
437 u32 xres, yres;
438 u32 xres_virtual, yres_virtual;
439 int bpp, lcd_bpp;
440 int is_color, is_dual, is_tft;
441 int lcd_enabled, crt_enabled;
442
443 fix->type = FB_TYPE_PACKED_PIXELS;
444
445 /* general info */
446 par->display = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
447 crt_enabled = (par->display & 0x02) != 0;
448 lcd_enabled = (par->display & 0x01) != 0;
449
450 if (lcd_enabled && crt_enabled)
451 printk(KERN_WARNING PFX "Warning: LCD and CRT detected, using LCD\n");
452
453 if (lcd_enabled)
454 display = s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_MODE);
455 else /* CRT */
456 display = s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_MODE);
457
458 bpp = display & 0x07;
459
460 switch (bpp) {
461 case 2: /* 4 bpp */
462 case 3: /* 8 bpp */
463 var->bits_per_pixel = 8;
464 var->red.offset = var->green.offset = var->blue.offset = 0;
465 var->red.length = var->green.length = var->blue.length = 8;
466 break;
467 case 5: /* 16 bpp */
468 s1d13xxxfb_setup_truecolour(info);
469 break;
470 default:
471 dbg("bpp: %i\n", bpp);
472 }
473 fb_alloc_cmap(&info->cmap, 256, 0);
474
475 /* LCD info */
476 panel = s1d13xxxfb_readreg(par, S1DREG_PANEL_TYPE);
477 is_color = (panel & 0x04) != 0;
478 is_dual = (panel & 0x02) != 0;
479 is_tft = (panel & 0x01) != 0;
480 lcd_bpp = s1d13xxxfb_width_tab[is_tft][(panel >> 4) & 3];
481
482 if (lcd_enabled) {
483 xres = (s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_HWIDTH) + 1) * 8;
484 yres = (s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_VHEIGHT0) +
485 ((s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_VHEIGHT1) & 0x03) << 8) + 1);
486
487 offset = (s1d13xxxfb_readreg(par, S1DREG_LCD_MEM_OFF0) +
488 ((s1d13xxxfb_readreg(par, S1DREG_LCD_MEM_OFF1) & 0x7) << 8));
489 } else { /* crt */
490 xres = (s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_HWIDTH) + 1) * 8;
491 yres = (s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_VHEIGHT0) +
492 ((s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_VHEIGHT1) & 0x03) << 8) + 1);
493
494 offset = (s1d13xxxfb_readreg(par, S1DREG_CRT_MEM_OFF0) +
495 ((s1d13xxxfb_readreg(par, S1DREG_CRT_MEM_OFF1) & 0x7) << 8));
496 }
497 xres_virtual = offset * 16 / var->bits_per_pixel;
498 yres_virtual = fix->smem_len / (offset * 2);
499
500 var->xres = xres;
501 var->yres = yres;
502 var->xres_virtual = xres_virtual;
503 var->yres_virtual = yres_virtual;
504 var->xoffset = var->yoffset = 0;
505
506 fix->line_length = offset * 2;
507
508 var->grayscale = !is_color;
509
510 var->activate = FB_ACTIVATE_NOW;
511
512 dbg(PFX "bpp=%d, lcd_bpp=%d, "
513 "crt_enabled=%d, lcd_enabled=%d\n",
514 var->bits_per_pixel, lcd_bpp, crt_enabled, lcd_enabled);
515 dbg(PFX "xres=%d, yres=%d, vxres=%d, vyres=%d "
516 "is_color=%d, is_dual=%d, is_tft=%d\n",
517 xres, yres, xres_virtual, yres_virtual, is_color, is_dual, is_tft);
518 }
519
520
521 static int
522 s1d13xxxfb_remove(struct platform_device *pdev)
523 {
524 struct fb_info *info = platform_get_drvdata(pdev);
525 struct s1d13xxxfb_par *par = NULL;
526
527 if (info) {
528 par = info->par;
529 if (par && par->regs) {
530 /* disable output & enable powersave */
531 s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, 0x00);
532 s1d13xxxfb_writereg(par, S1DREG_PS_CNF, 0x11);
533 iounmap(par->regs);
534 }
535
536 fb_dealloc_cmap(&info->cmap);
537
538 if (info->screen_base)
539 iounmap(info->screen_base);
540
541 framebuffer_release(info);
542 }
543
544 release_mem_region(pdev->resource[0].start,
545 pdev->resource[0].end - pdev->resource[0].start +1);
546 release_mem_region(pdev->resource[1].start,
547 pdev->resource[1].end - pdev->resource[1].start +1);
548 return 0;
549 }
550
551 static int __devinit
552 s1d13xxxfb_probe(struct platform_device *pdev)
553 {
554 struct s1d13xxxfb_par *default_par;
555 struct fb_info *info;
556 struct s1d13xxxfb_pdata *pdata = NULL;
557 int ret = 0;
558 int i;
559 u8 revision, prod_id;
560
561 dbg("probe called: device is %p\n", pdev);
562
563 printk(KERN_INFO "Epson S1D13XXX FB Driver\n");
564
565 /* enable platform-dependent hardware glue, if any */
566 if (pdev->dev.platform_data)
567 pdata = pdev->dev.platform_data;
568
569 if (pdata && pdata->platform_init_video)
570 pdata->platform_init_video();
571
572
573 if (pdev->num_resources != 2) {
574 dev_err(&pdev->dev, "invalid num_resources: %i\n",
575 pdev->num_resources);
576 ret = -ENODEV;
577 goto bail;
578 }
579
580 /* resource[0] is VRAM, resource[1] is registers */
581 if (pdev->resource[0].flags != IORESOURCE_MEM
582 || pdev->resource[1].flags != IORESOURCE_MEM) {
583 dev_err(&pdev->dev, "invalid resource type\n");
584 ret = -ENODEV;
585 goto bail;
586 }
587
588 if (!request_mem_region(pdev->resource[0].start,
589 pdev->resource[0].end - pdev->resource[0].start +1, "s1d13xxxfb mem")) {
590 dev_dbg(&pdev->dev, "request_mem_region failed\n");
591 ret = -EBUSY;
592 goto bail;
593 }
594
595 if (!request_mem_region(pdev->resource[1].start,
596 pdev->resource[1].end - pdev->resource[1].start +1, "s1d13xxxfb regs")) {
597 dev_dbg(&pdev->dev, "request_mem_region failed\n");
598 ret = -EBUSY;
599 goto bail;
600 }
601
602 info = framebuffer_alloc(sizeof(struct s1d13xxxfb_par) + sizeof(u32) * 256, &pdev->dev);
603 if (!info) {
604 ret = -ENOMEM;
605 goto bail;
606 }
607
608 platform_set_drvdata(pdev, info);
609 default_par = info->par;
610 default_par->regs = ioremap_nocache(pdev->resource[1].start,
611 pdev->resource[1].end - pdev->resource[1].start +1);
612 if (!default_par->regs) {
613 printk(KERN_ERR PFX "unable to map registers\n");
614 ret = -ENOMEM;
615 goto bail;
616 }
617 info->pseudo_palette = default_par->pseudo_palette;
618
619 info->screen_base = ioremap_nocache(pdev->resource[0].start,
620 pdev->resource[0].end - pdev->resource[0].start +1);
621
622 if (!info->screen_base) {
623 printk(KERN_ERR PFX "unable to map framebuffer\n");
624 ret = -ENOMEM;
625 goto bail;
626 }
627
628 /* production id is top 6 bits */
629 prod_id = s1d13xxxfb_readreg(default_par, S1DREG_REV_CODE) >> 2;
630 /* revision id is lower 2 bits */
631 revision = s1d13xxxfb_readreg(default_par, S1DREG_REV_CODE) & 0x3;
632 ret = -ENODEV;
633
634 for (i = 0; i < ARRAY_SIZE(s1d13xxxfb_prod_ids); i++) {
635 if (prod_id == s1d13xxxfb_prod_ids[i]) {
636 /* looks like we got it in our list */
637 default_par->prod_id = prod_id;
638 default_par->revision = revision;
639 ret = 0;
640 break;
641 }
642 }
643
644 if (!ret) {
645 printk(KERN_INFO PFX "chip production id %i = %s\n",
646 prod_id, s1d13xxxfb_prod_names[i]);
647 printk(KERN_INFO PFX "chip revision %i\n", revision);
648 } else {
649 printk(KERN_INFO PFX
650 "unknown chip production id %i, revision %i\n",
651 prod_id, revision);
652 printk(KERN_INFO PFX "please contant maintainer\n");
653 goto bail;
654 }
655
656 info->fix = s1d13xxxfb_fix;
657 info->fix.mmio_start = pdev->resource[1].start;
658 info->fix.mmio_len = pdev->resource[1].end - pdev->resource[1].start +1;
659 info->fix.smem_start = pdev->resource[0].start;
660 info->fix.smem_len = pdev->resource[0].end - pdev->resource[0].start +1;
661
662 printk(KERN_INFO PFX "regs mapped at 0x%p, fb %d KiB mapped at 0x%p\n",
663 default_par->regs, info->fix.smem_len / 1024, info->screen_base);
664
665 info->par = default_par;
666 info->fbops = &s1d13xxxfb_fbops;
667 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
668
669 /* perform "manual" chip initialization, if needed */
670 if (pdata && pdata->initregs)
671 s1d13xxxfb_runinit(info->par, pdata->initregs, pdata->initregssize);
672
673 s1d13xxxfb_fetch_hw_state(info);
674
675 if (register_framebuffer(info) < 0) {
676 ret = -EINVAL;
677 goto bail;
678 }
679
680 printk(KERN_INFO "fb%d: %s frame buffer device\n",
681 info->node, info->fix.id);
682
683 return 0;
684
685 bail:
686 s1d13xxxfb_remove(pdev);
687 return ret;
688
689 }
690
691 #ifdef CONFIG_PM
692 static int s1d13xxxfb_suspend(struct platform_device *dev, pm_message_t state)
693 {
694 struct fb_info *info = platform_get_drvdata(dev);
695 struct s1d13xxxfb_par *s1dfb = info->par;
696 struct s1d13xxxfb_pdata *pdata = NULL;
697
698 /* disable display */
699 lcd_enable(s1dfb, 0);
700 crt_enable(s1dfb, 0);
701
702 if (dev->dev.platform_data)
703 pdata = dev->dev.platform_data;
704
705 #if 0
706 if (!s1dfb->disp_save)
707 s1dfb->disp_save = kmalloc(info->fix.smem_len, GFP_KERNEL);
708
709 if (!s1dfb->disp_save) {
710 printk(KERN_ERR PFX "no memory to save screen");
711 return -ENOMEM;
712 }
713
714 memcpy_fromio(s1dfb->disp_save, info->screen_base, info->fix.smem_len);
715 #else
716 s1dfb->disp_save = NULL;
717 #endif
718
719 if (!s1dfb->regs_save)
720 s1dfb->regs_save = kmalloc(info->fix.mmio_len, GFP_KERNEL);
721
722 if (!s1dfb->regs_save) {
723 printk(KERN_ERR PFX "no memory to save registers");
724 return -ENOMEM;
725 }
726
727 /* backup all registers */
728 memcpy_fromio(s1dfb->regs_save, s1dfb->regs, info->fix.mmio_len);
729
730 /* now activate power save mode */
731 s1d13xxxfb_writereg(s1dfb, S1DREG_PS_CNF, 0x11);
732
733 if (pdata && pdata->platform_suspend_video)
734 return pdata->platform_suspend_video();
735 else
736 return 0;
737 }
738
739 static int s1d13xxxfb_resume(struct platform_device *dev)
740 {
741 struct fb_info *info = platform_get_drvdata(dev);
742 struct s1d13xxxfb_par *s1dfb = info->par;
743 struct s1d13xxxfb_pdata *pdata = NULL;
744
745 /* awaken the chip */
746 s1d13xxxfb_writereg(s1dfb, S1DREG_PS_CNF, 0x10);
747
748 /* do not let go until SDRAM "wakes up" */
749 while ((s1d13xxxfb_readreg(s1dfb, S1DREG_PS_STATUS) & 0x01))
750 udelay(10);
751
752 if (dev->dev.platform_data)
753 pdata = dev->dev.platform_data;
754
755 if (s1dfb->regs_save) {
756 /* will write RO regs, *should* get away with it :) */
757 memcpy_toio(s1dfb->regs, s1dfb->regs_save, info->fix.mmio_len);
758 kfree(s1dfb->regs_save);
759 }
760
761 if (s1dfb->disp_save) {
762 memcpy_toio(info->screen_base, s1dfb->disp_save,
763 info->fix.smem_len);
764 kfree(s1dfb->disp_save); /* XXX kmalloc()'d when? */
765 }
766
767 if ((s1dfb->display & 0x01) != 0)
768 lcd_enable(s1dfb, 1);
769 if ((s1dfb->display & 0x02) != 0)
770 crt_enable(s1dfb, 1);
771
772 if (pdata && pdata->platform_resume_video)
773 return pdata->platform_resume_video();
774 else
775 return 0;
776 }
777 #endif /* CONFIG_PM */
778
779 static struct platform_driver s1d13xxxfb_driver = {
780 .probe = s1d13xxxfb_probe,
781 .remove = s1d13xxxfb_remove,
782 #ifdef CONFIG_PM
783 .suspend = s1d13xxxfb_suspend,
784 .resume = s1d13xxxfb_resume,
785 #endif
786 .driver = {
787 .name = S1D_DEVICENAME,
788 },
789 };
790
791
792 static int __init
793 s1d13xxxfb_init(void)
794 {
795
796 #ifndef MODULE
797 if (fb_get_options("s1d13xxxfb", NULL))
798 return -ENODEV;
799 #endif
800
801 return platform_driver_register(&s1d13xxxfb_driver);
802 }
803
804
805 static void __exit
806 s1d13xxxfb_exit(void)
807 {
808 platform_driver_unregister(&s1d13xxxfb_driver);
809 }
810
811 module_init(s1d13xxxfb_init);
812 module_exit(s1d13xxxfb_exit);
813
814
815 MODULE_LICENSE("GPL");
816 MODULE_DESCRIPTION("Framebuffer driver for S1D13xxx devices");
817 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>, Thibaut VARENE <varenet@parisc-linux.org>");
Support for the Chinese Samsung S3C2440 based development boards