blob: e5d0f92eeae36613314f4bd347f9090777c07a02 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* 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/config.h>
32#include <linux/module.h>
Russell Kingd052d1b2005-10-29 19:07:23 +010033#include <linux/platform_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <linux/delay.h>
35
36#include <linux/types.h>
37#include <linux/errno.h>
38#include <linux/mm.h>
39#include <linux/mman.h>
40#include <linux/fb.h>
41
42#include <asm/io.h>
43
44#include <video/s1d13xxxfb.h>
45
46#define PFX "s1d13xxxfb: "
47
48#if 0
49#define dbg(fmt, args...) do { printk(KERN_INFO fmt, ## args); } while(0)
50#else
51#define dbg(fmt, args...) do { } while (0)
52#endif
53
54/*
55 * Here we define the default struct fb_fix_screeninfo
56 */
57static struct fb_fix_screeninfo __devinitdata s1d13xxxfb_fix = {
58 .id = S1D_FBID,
59 .type = FB_TYPE_PACKED_PIXELS,
60 .visual = FB_VISUAL_PSEUDOCOLOR,
61 .xpanstep = 0,
62 .ypanstep = 1,
63 .ywrapstep = 0,
64 .accel = FB_ACCEL_NONE,
65};
66
67static inline u8
68s1d13xxxfb_readreg(struct s1d13xxxfb_par *par, u16 regno)
69{
Hirokazu Takata316240f2005-07-07 17:59:32 -070070#if defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_OPSPUT) || defined(CONFIG_PLAT_MAPPI3)
71 regno=((regno & 1) ? (regno & ~1L) : (regno + 1));
72#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 return readb(par->regs + regno);
74}
75
76static inline void
77s1d13xxxfb_writereg(struct s1d13xxxfb_par *par, u16 regno, u8 value)
78{
Hirokazu Takata316240f2005-07-07 17:59:32 -070079#if defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_OPSPUT) || defined(CONFIG_PLAT_MAPPI3)
80 regno=((regno & 1) ? (regno & ~1L) : (regno + 1));
81#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 writeb(value, par->regs + regno);
83}
84
85static inline void
86s1d13xxxfb_runinit(struct s1d13xxxfb_par *par,
87 const struct s1d13xxxfb_regval *initregs,
88 const unsigned int size)
89{
90 int i;
91
92 for (i = 0; i < size; i++) {
93 if ((initregs[i].addr == S1DREG_DELAYOFF) ||
94 (initregs[i].addr == S1DREG_DELAYON))
95 mdelay((int)initregs[i].value);
96 else {
97 s1d13xxxfb_writereg(par, initregs[i].addr, initregs[i].value);
98 }
99 }
100
101 /* make sure the hardware can cope with us */
102 mdelay(1);
103}
104
105static inline void
106lcd_enable(struct s1d13xxxfb_par *par, int enable)
107{
108 u8 mode = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
109
110 if (enable)
111 mode |= 0x01;
112 else
113 mode &= ~0x01;
114
115 s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, mode);
116}
117
118static inline void
119crt_enable(struct s1d13xxxfb_par *par, int enable)
120{
121 u8 mode = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
122
123 if (enable)
124 mode |= 0x02;
125 else
126 mode &= ~0x02;
127
128 s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, mode);
129}
130
131/* framebuffer control routines */
132
133static inline void
134s1d13xxxfb_setup_pseudocolour(struct fb_info *info)
135{
136 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
137
138 info->var.red.length = 4;
139 info->var.green.length = 4;
140 info->var.blue.length = 4;
141}
142
143static inline void
144s1d13xxxfb_setup_truecolour(struct fb_info *info)
145{
146 info->fix.visual = FB_VISUAL_TRUECOLOR;
147 info->var.bits_per_pixel = 16;
148
149 info->var.red.length = 5;
150 info->var.red.offset = 11;
151
152 info->var.green.length = 6;
153 info->var.green.offset = 5;
154
155 info->var.blue.length = 5;
156 info->var.blue.offset = 0;
157}
158
159/**
160 * s1d13xxxfb_set_par - Alters the hardware state.
161 * @info: frame buffer structure
162 *
163 * Using the fb_var_screeninfo in fb_info we set the depth of the
164 * framebuffer. This function alters the par AND the
165 * fb_fix_screeninfo stored in fb_info. It doesn't not alter var in
166 * fb_info since we are using that data. This means we depend on the
167 * data in var inside fb_info to be supported by the hardware.
168 * xxxfb_check_var is always called before xxxfb_set_par to ensure this.
169 *
170 * XXX TODO: write proper s1d13xxxfb_check_var(), without which that
171 * function is quite useless.
172 */
173static int
174s1d13xxxfb_set_par(struct fb_info *info)
175{
176 struct s1d13xxxfb_par *s1dfb = info->par;
177 unsigned int val;
178
179 dbg("s1d13xxxfb_set_par: bpp=%d\n", info->var.bits_per_pixel);
180
181 if ((s1dfb->display & 0x01)) /* LCD */
182 val = s1d13xxxfb_readreg(s1dfb, S1DREG_LCD_DISP_MODE); /* read colour control */
183 else /* CRT */
184 val = s1d13xxxfb_readreg(s1dfb, S1DREG_CRT_DISP_MODE); /* read colour control */
185
186 val &= ~0x07;
187
188 switch (info->var.bits_per_pixel) {
189 case 4:
190 dbg("pseudo colour 4\n");
191 s1d13xxxfb_setup_pseudocolour(info);
192 val |= 2;
193 break;
194 case 8:
195 dbg("pseudo colour 8\n");
196 s1d13xxxfb_setup_pseudocolour(info);
197 val |= 3;
198 break;
199 case 16:
200 dbg("true colour\n");
201 s1d13xxxfb_setup_truecolour(info);
202 val |= 5;
203 break;
204
205 default:
206 dbg("bpp not supported!\n");
207 return -EINVAL;
208 }
209
210 dbg("writing %02x to display mode register\n", val);
211
212 if ((s1dfb->display & 0x01)) /* LCD */
213 s1d13xxxfb_writereg(s1dfb, S1DREG_LCD_DISP_MODE, val);
214 else /* CRT */
215 s1d13xxxfb_writereg(s1dfb, S1DREG_CRT_DISP_MODE, val);
216
217 info->fix.line_length = info->var.xres * info->var.bits_per_pixel;
218 info->fix.line_length /= 8;
219
220 dbg("setting line_length to %d\n", info->fix.line_length);
221
222 dbg("done setup\n");
223
224 return 0;
225}
226
227/**
228 * s1d13xxxfb_setcolreg - sets a color register.
229 * @regno: Which register in the CLUT we are programming
230 * @red: The red value which can be up to 16 bits wide
231 * @green: The green value which can be up to 16 bits wide
232 * @blue: The blue value which can be up to 16 bits wide.
233 * @transp: If supported the alpha value which can be up to 16 bits wide.
234 * @info: frame buffer info structure
235 *
236 * Returns negative errno on error, or zero on success.
237 */
238static int
239s1d13xxxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
240 u_int transp, struct fb_info *info)
241{
242 struct s1d13xxxfb_par *s1dfb = info->par;
243 unsigned int pseudo_val;
244
245 if (regno >= S1D_PALETTE_SIZE)
246 return -EINVAL;
247
248 dbg("s1d13xxxfb_setcolreg: %d: rgb=%d,%d,%d, tr=%d\n",
249 regno, red, green, blue, transp);
250
251 if (info->var.grayscale)
252 red = green = blue = (19595*red + 38470*green + 7471*blue) >> 16;
253
254 switch (info->fix.visual) {
255 case FB_VISUAL_TRUECOLOR:
256 if (regno >= 16)
257 return -EINVAL;
258
259 /* deal with creating pseudo-palette entries */
260
261 pseudo_val = (red >> 11) << info->var.red.offset;
262 pseudo_val |= (green >> 10) << info->var.green.offset;
263 pseudo_val |= (blue >> 11) << info->var.blue.offset;
264
265 dbg("s1d13xxxfb_setcolreg: pseudo %d, val %08x\n",
266 regno, pseudo_val);
267
Hirokazu Takata316240f2005-07-07 17:59:32 -0700268#if defined(CONFIG_PLAT_MAPPI)
269 ((u32 *)info->pseudo_palette)[regno] = cpu_to_le16(pseudo_val);
270#else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 ((u32 *)info->pseudo_palette)[regno] = pseudo_val;
Hirokazu Takata316240f2005-07-07 17:59:32 -0700272#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273
274 break;
275 case FB_VISUAL_PSEUDOCOLOR:
276 s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_ADDR, regno);
277 s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_DATA, red);
278 s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_DATA, green);
279 s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_DATA, blue);
280
281 break;
282 default:
283 return -ENOSYS;
284 }
285
286 dbg("s1d13xxxfb_setcolreg: done\n");
287
288 return 0;
289}
290
291/**
292 * s1d13xxxfb_blank - blanks the display.
293 * @blank_mode: the blank mode we want.
294 * @info: frame buffer structure that represents a single frame buffer
295 *
296 * Blank the screen if blank_mode != 0, else unblank. Return 0 if
297 * blanking succeeded, != 0 if un-/blanking failed due to e.g. a
298 * video mode which doesn't support it. Implements VESA suspend
299 * and powerdown modes on hardware that supports disabling hsync/vsync:
300 * blank_mode == 2: suspend vsync
301 * blank_mode == 3: suspend hsync
302 * blank_mode == 4: powerdown
303 *
304 * Returns negative errno on error, or zero on success.
305 */
306static int
307s1d13xxxfb_blank(int blank_mode, struct fb_info *info)
308{
309 struct s1d13xxxfb_par *par = info->par;
310
311 dbg("s1d13xxxfb_blank: blank=%d, info=%p\n", blank_mode, info);
312
313 switch (blank_mode) {
314 case FB_BLANK_UNBLANK:
315 case FB_BLANK_NORMAL:
316 if ((par->display & 0x01) != 0)
317 lcd_enable(par, 1);
318 if ((par->display & 0x02) != 0)
319 crt_enable(par, 1);
320 break;
321 case FB_BLANK_VSYNC_SUSPEND:
322 case FB_BLANK_HSYNC_SUSPEND:
323 break;
324 case FB_BLANK_POWERDOWN:
325 lcd_enable(par, 0);
326 crt_enable(par, 0);
327 break;
328 default:
329 return -EINVAL;
330 }
331
332 /* let fbcon do a soft blank for us */
333 return ((blank_mode == FB_BLANK_NORMAL) ? 1 : 0);
334}
335
336/**
337 * s1d13xxxfb_pan_display - Pans the display.
338 * @var: frame buffer variable screen structure
339 * @info: frame buffer structure that represents a single frame buffer
340 *
341 * Pan (or wrap, depending on the `vmode' field) the display using the
342 * `yoffset' field of the `var' structure (`xoffset' not yet supported).
343 * If the values don't fit, return -EINVAL.
344 *
345 * Returns negative errno on error, or zero on success.
346 */
347static int
348s1d13xxxfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
349{
350 struct s1d13xxxfb_par *par = info->par;
351 u32 start;
352
353 if (var->xoffset != 0) /* not yet ... */
354 return -EINVAL;
355
356 if (var->yoffset + info->var.yres > info->var.yres_virtual)
357 return -EINVAL;
358
359 start = (info->fix.line_length >> 1) * var->yoffset;
360
361 if ((par->display & 0x01)) {
362 /* LCD */
363 s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START0, (start & 0xff));
364 s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START1, ((start >> 8) & 0xff));
365 s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START2, ((start >> 16) & 0x0f));
366 } else {
367 /* CRT */
368 s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START0, (start & 0xff));
369 s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START1, ((start >> 8) & 0xff));
370 s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START2, ((start >> 16) & 0x0f));
371 }
372
373 return 0;
374}
375
376
377/* framebuffer information structures */
378
379static struct fb_ops s1d13xxxfb_fbops = {
380 .owner = THIS_MODULE,
381 .fb_set_par = s1d13xxxfb_set_par,
382 .fb_setcolreg = s1d13xxxfb_setcolreg,
383 .fb_blank = s1d13xxxfb_blank,
384
385 .fb_pan_display = s1d13xxxfb_pan_display,
386
387 /* to be replaced by any acceleration we can */
388 .fb_fillrect = cfb_fillrect,
389 .fb_copyarea = cfb_copyarea,
390 .fb_imageblit = cfb_imageblit,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391};
392
393static int s1d13xxxfb_width_tab[2][4] __devinitdata = {
394 {4, 8, 16, -1},
395 {9, 12, 18, -1},
396};
397
398/**
399 * s1d13xxxfb_fetch_hw_state - Configure the framebuffer according to
400 * hardware setup.
401 * @info: frame buffer structure
402 *
403 * We setup the framebuffer structures according to the current
404 * hardware setup. On some machines, the BIOS will have filled
405 * the chip registers with such info, on others, these values will
406 * have been written in some init procedure. In any case, the
407 * software values needs to match the hardware ones. This is what
408 * this function ensures.
409 *
410 * Note: some of the hardcoded values here might need some love to
411 * work on various chips, and might need to no longer be hardcoded.
412 */
413static void __devinit
414s1d13xxxfb_fetch_hw_state(struct fb_info *info)
415{
416 struct fb_var_screeninfo *var = &info->var;
417 struct fb_fix_screeninfo *fix = &info->fix;
418 struct s1d13xxxfb_par *par = info->par;
419 u8 panel, display;
420 u16 offset;
421 u32 xres, yres;
422 u32 xres_virtual, yres_virtual;
423 int bpp, lcd_bpp;
424 int is_color, is_dual, is_tft;
425 int lcd_enabled, crt_enabled;
426
427 fix->type = FB_TYPE_PACKED_PIXELS;
428
429 /* general info */
430 par->display = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
431 crt_enabled = (par->display & 0x02) != 0;
432 lcd_enabled = (par->display & 0x01) != 0;
433
434 if (lcd_enabled && crt_enabled)
435 printk(KERN_WARNING PFX "Warning: LCD and CRT detected, using LCD\n");
436
437 if (lcd_enabled)
438 display = s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_MODE);
439 else /* CRT */
440 display = s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_MODE);
441
442 bpp = display & 0x07;
443
444 switch (bpp) {
445 case 2: /* 4 bpp */
446 case 3: /* 8 bpp */
447 var->bits_per_pixel = 8;
448 var->red.offset = var->green.offset = var->blue.offset = 0;
449 var->red.length = var->green.length = var->blue.length = 8;
450 break;
451 case 5: /* 16 bpp */
452 s1d13xxxfb_setup_truecolour(info);
453 break;
454 default:
455 dbg("bpp: %i\n", bpp);
456 }
457 fb_alloc_cmap(&info->cmap, 256, 0);
458
459 /* LCD info */
460 panel = s1d13xxxfb_readreg(par, S1DREG_PANEL_TYPE);
461 is_color = (panel & 0x04) != 0;
462 is_dual = (panel & 0x02) != 0;
463 is_tft = (panel & 0x01) != 0;
464 lcd_bpp = s1d13xxxfb_width_tab[is_tft][(panel >> 4) & 3];
465
466 if (lcd_enabled) {
467 xres = (s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_HWIDTH) + 1) * 8;
468 yres = (s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_VHEIGHT0) +
469 ((s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_VHEIGHT1) & 0x03) << 8) + 1);
470
471 offset = (s1d13xxxfb_readreg(par, S1DREG_LCD_MEM_OFF0) +
472 ((s1d13xxxfb_readreg(par, S1DREG_LCD_MEM_OFF1) & 0x7) << 8));
473 } else { /* crt */
474 xres = (s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_HWIDTH) + 1) * 8;
475 yres = (s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_VHEIGHT0) +
476 ((s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_VHEIGHT1) & 0x03) << 8) + 1);
477
478 offset = (s1d13xxxfb_readreg(par, S1DREG_CRT_MEM_OFF0) +
479 ((s1d13xxxfb_readreg(par, S1DREG_CRT_MEM_OFF1) & 0x7) << 8));
480 }
481 xres_virtual = offset * 16 / var->bits_per_pixel;
482 yres_virtual = fix->smem_len / (offset * 2);
483
484 var->xres = xres;
485 var->yres = yres;
486 var->xres_virtual = xres_virtual;
487 var->yres_virtual = yres_virtual;
488 var->xoffset = var->yoffset = 0;
489
490 fix->line_length = offset * 2;
491
492 var->grayscale = !is_color;
493
494 var->activate = FB_ACTIVATE_NOW;
495
496 dbg(PFX "bpp=%d, lcd_bpp=%d, "
497 "crt_enabled=%d, lcd_enabled=%d\n",
498 var->bits_per_pixel, lcd_bpp, crt_enabled, lcd_enabled);
499 dbg(PFX "xres=%d, yres=%d, vxres=%d, vyres=%d "
500 "is_color=%d, is_dual=%d, is_tft=%d\n",
501 xres, yres, xres_virtual, yres_virtual, is_color, is_dual, is_tft);
502}
503
504
Andrew Morton27f931d2005-06-21 17:16:55 -0700505static int
Russell King3ae5eae2005-11-09 22:32:44 +0000506s1d13xxxfb_remove(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507{
Russell King3ae5eae2005-11-09 22:32:44 +0000508 struct fb_info *info = platform_get_drvdata(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 struct s1d13xxxfb_par *par = NULL;
510
511 if (info) {
512 par = info->par;
513 if (par && par->regs) {
514 /* disable output & enable powersave */
515 s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, 0x00);
516 s1d13xxxfb_writereg(par, S1DREG_PS_CNF, 0x11);
517 iounmap(par->regs);
518 }
519
520 fb_dealloc_cmap(&info->cmap);
521
522 if (info->screen_base)
523 iounmap(info->screen_base);
524
525 framebuffer_release(info);
526 }
527
528 release_mem_region(pdev->resource[0].start,
529 pdev->resource[0].end - pdev->resource[0].start +1);
530 release_mem_region(pdev->resource[1].start,
531 pdev->resource[1].end - pdev->resource[1].start +1);
532 return 0;
533}
534
535static int __devinit
Russell King3ae5eae2005-11-09 22:32:44 +0000536s1d13xxxfb_probe(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 struct s1d13xxxfb_par *default_par;
539 struct fb_info *info;
540 struct s1d13xxxfb_pdata *pdata = NULL;
541 int ret = 0;
542 u8 revision;
543
544 dbg("probe called: device is %p\n", dev);
545
546 printk(KERN_INFO "Epson S1D13XXX FB Driver\n");
547
548 /* enable platform-dependent hardware glue, if any */
Russell King3ae5eae2005-11-09 22:32:44 +0000549 if (pdev->dev.platform_data)
550 pdata = pdev->dev.platform_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551
552 if (pdata && pdata->platform_init_video)
553 pdata->platform_init_video();
554
555
556 if (pdev->num_resources != 2) {
557 dev_err(&pdev->dev, "invalid num_resources: %i\n",
558 pdev->num_resources);
559 ret = -ENODEV;
560 goto bail;
561 }
562
563 /* resource[0] is VRAM, resource[1] is registers */
564 if (pdev->resource[0].flags != IORESOURCE_MEM
565 || pdev->resource[1].flags != IORESOURCE_MEM) {
566 dev_err(&pdev->dev, "invalid resource type\n");
567 ret = -ENODEV;
568 goto bail;
569 }
570
571 if (!request_mem_region(pdev->resource[0].start,
572 pdev->resource[0].end - pdev->resource[0].start +1, "s1d13xxxfb mem")) {
Russell King3ae5eae2005-11-09 22:32:44 +0000573 dev_dbg(&pdev->dev, "request_mem_region failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 ret = -EBUSY;
575 goto bail;
576 }
577
578 if (!request_mem_region(pdev->resource[1].start,
579 pdev->resource[1].end - pdev->resource[1].start +1, "s1d13xxxfb regs")) {
Russell King3ae5eae2005-11-09 22:32:44 +0000580 dev_dbg(&pdev->dev, "request_mem_region failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 ret = -EBUSY;
582 goto bail;
583 }
584
585 info = framebuffer_alloc(sizeof(struct s1d13xxxfb_par) + sizeof(u32) * 256, &pdev->dev);
586 if (!info) {
587 ret = -ENOMEM;
588 goto bail;
589 }
590
591 default_par = info->par;
592 default_par->regs = ioremap_nocache(pdev->resource[1].start,
593 pdev->resource[1].end - pdev->resource[1].start +1);
594 if (!default_par->regs) {
595 printk(KERN_ERR PFX "unable to map registers\n");
596 ret = -ENOMEM;
597 goto bail;
598 }
599 info->pseudo_palette = default_par->pseudo_palette;
600
601 info->screen_base = ioremap_nocache(pdev->resource[0].start,
602 pdev->resource[0].end - pdev->resource[0].start +1);
603
604 if (!info->screen_base) {
605 printk(KERN_ERR PFX "unable to map framebuffer\n");
606 ret = -ENOMEM;
607 goto bail;
608 }
609
610 revision = s1d13xxxfb_readreg(default_par, S1DREG_REV_CODE);
611 if ((revision >> 2) != S1D_CHIP_REV) {
612 printk(KERN_INFO PFX "chip not found: %i\n", (revision >> 2));
613 ret = -ENODEV;
614 goto bail;
615 }
616
617 info->fix = s1d13xxxfb_fix;
618 info->fix.mmio_start = pdev->resource[1].start;
619 info->fix.mmio_len = pdev->resource[1].end - pdev->resource[1].start +1;
620 info->fix.smem_start = pdev->resource[0].start;
621 info->fix.smem_len = pdev->resource[0].end - pdev->resource[0].start +1;
622
623 printk(KERN_INFO PFX "regs mapped at 0x%p, fb %d KiB mapped at 0x%p\n",
624 default_par->regs, info->fix.smem_len / 1024, info->screen_base);
625
626 info->par = default_par;
627 info->fbops = &s1d13xxxfb_fbops;
628 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
629
630 /* perform "manual" chip initialization, if needed */
631 if (pdata && pdata->initregs)
632 s1d13xxxfb_runinit(info->par, pdata->initregs, pdata->initregssize);
633
634 s1d13xxxfb_fetch_hw_state(info);
635
636 if (register_framebuffer(info) < 0) {
637 ret = -EINVAL;
638 goto bail;
639 }
640
Russell King3ae5eae2005-11-09 22:32:44 +0000641 platform_set_drvdata(pdev, info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642
643 printk(KERN_INFO "fb%d: %s frame buffer device\n",
644 info->node, info->fix.id);
645
646 return 0;
647
648bail:
Russell King3ae5eae2005-11-09 22:32:44 +0000649 s1d13xxxfb_remove(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 return ret;
651
652}
653
654#ifdef CONFIG_PM
Russell King3ae5eae2005-11-09 22:32:44 +0000655static int s1d13xxxfb_suspend(struct platform_device *dev, pm_message_t state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656{
Russell King3ae5eae2005-11-09 22:32:44 +0000657 struct fb_info *info = platform_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 struct s1d13xxxfb_par *s1dfb = info->par;
659 struct s1d13xxxfb_pdata *pdata = NULL;
660
661 /* disable display */
662 lcd_enable(s1dfb, 0);
663 crt_enable(s1dfb, 0);
664
Russell King3ae5eae2005-11-09 22:32:44 +0000665 if (dev->dev.platform_data)
666 pdata = dev->dev.platform_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667
668#if 0
669 if (!s1dfb->disp_save)
670 s1dfb->disp_save = kmalloc(info->fix.smem_len, GFP_KERNEL);
671
672 if (!s1dfb->disp_save) {
673 printk(KERN_ERR PFX "no memory to save screen");
674 return -ENOMEM;
675 }
676
677 memcpy_fromio(s1dfb->disp_save, info->screen_base, info->fix.smem_len);
678#else
679 s1dfb->disp_save = NULL;
680#endif
681
682 if (!s1dfb->regs_save)
683 s1dfb->regs_save = kmalloc(info->fix.mmio_len, GFP_KERNEL);
684
685 if (!s1dfb->regs_save) {
686 printk(KERN_ERR PFX "no memory to save registers");
687 return -ENOMEM;
688 }
689
690 /* backup all registers */
691 memcpy_fromio(s1dfb->regs_save, s1dfb->regs, info->fix.mmio_len);
692
693 /* now activate power save mode */
694 s1d13xxxfb_writereg(s1dfb, S1DREG_PS_CNF, 0x11);
695
696 if (pdata && pdata->platform_suspend_video)
697 return pdata->platform_suspend_video();
698 else
699 return 0;
700}
701
Russell King3ae5eae2005-11-09 22:32:44 +0000702static int s1d13xxxfb_resume(struct platform_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703{
Russell King3ae5eae2005-11-09 22:32:44 +0000704 struct fb_info *info = platform_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 struct s1d13xxxfb_par *s1dfb = info->par;
706 struct s1d13xxxfb_pdata *pdata = NULL;
707
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 /* awaken the chip */
709 s1d13xxxfb_writereg(s1dfb, S1DREG_PS_CNF, 0x10);
710
711 /* do not let go until SDRAM "wakes up" */
712 while ((s1d13xxxfb_readreg(s1dfb, S1DREG_PS_STATUS) & 0x01))
713 udelay(10);
714
Russell King3ae5eae2005-11-09 22:32:44 +0000715 if (dev->dev.platform_data)
716 pdata = dev->dev.platform_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717
718 if (s1dfb->regs_save) {
719 /* will write RO regs, *should* get away with it :) */
720 memcpy_toio(s1dfb->regs, s1dfb->regs_save, info->fix.mmio_len);
721 kfree(s1dfb->regs_save);
722 }
723
724 if (s1dfb->disp_save) {
725 memcpy_toio(info->screen_base, s1dfb->disp_save,
726 info->fix.smem_len);
727 kfree(s1dfb->disp_save); /* XXX kmalloc()'d when? */
728 }
729
730 if ((s1dfb->display & 0x01) != 0)
731 lcd_enable(s1dfb, 1);
732 if ((s1dfb->display & 0x02) != 0)
733 crt_enable(s1dfb, 1);
734
735 if (pdata && pdata->platform_resume_video)
736 return pdata->platform_resume_video();
737 else
738 return 0;
739}
740#endif /* CONFIG_PM */
741
Russell King3ae5eae2005-11-09 22:32:44 +0000742static struct platform_driver s1d13xxxfb_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 .probe = s1d13xxxfb_probe,
744 .remove = s1d13xxxfb_remove,
745#ifdef CONFIG_PM
746 .suspend = s1d13xxxfb_suspend,
Russell King3ae5eae2005-11-09 22:32:44 +0000747 .resume = s1d13xxxfb_resume,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748#endif
Russell King3ae5eae2005-11-09 22:32:44 +0000749 .driver = {
750 .name = S1D_DEVICENAME,
751 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752};
753
754
755static int __init
756s1d13xxxfb_init(void)
757{
758 if (fb_get_options("s1d13xxxfb", NULL))
759 return -ENODEV;
760
Russell King3ae5eae2005-11-09 22:32:44 +0000761 return platform_driver_register(&s1d13xxxfb_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762}
763
764
765static void __exit
766s1d13xxxfb_exit(void)
767{
Russell King3ae5eae2005-11-09 22:32:44 +0000768 platform_driver_unregister(&s1d13xxxfb_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769}
770
771module_init(s1d13xxxfb_init);
772module_exit(s1d13xxxfb_exit);
773
774
775MODULE_LICENSE("GPL");
776MODULE_DESCRIPTION("Framebuffer driver for S1D13xxx devices");
777MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>, Thibaut VARENE <varenet@parisc-linux.org>");