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Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
[drm/drm-misc.git] / drivers / video / fbdev / s1d13xxxfb.c
blobe80c806ef520dc4beba2c5091a446c3c4c947a22
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 #include <linux/io.h>
36
37 #include <video/s1d13xxxfb.h>
38
39 #define PFX "s1d13xxxfb: "
40 #define BLIT "s1d13xxxfb_bitblt: "
41
42 /*
43 * set this to enable debugging on general functions
44 */
45 #if 0
46 #define dbg(fmt, args...) do { printk(KERN_INFO fmt, ## args); } while(0)
47 #else
48 #define dbg(fmt, args...) do { no_printk(KERN_INFO fmt, ## args); } while (0)
49 #endif
50
51 /*
52 * set this to enable debugging on 2D acceleration
53 */
54 #if 0
55 #define dbg_blit(fmt, args...) do { printk(KERN_INFO BLIT fmt, ## args); } while (0)
56 #else
57 #define dbg_blit(fmt, args...) do { } while (0)
58 #endif
59
60 /*
61 * we make sure only one bitblt operation is running
62 */
63 static DEFINE_SPINLOCK(s1d13xxxfb_bitblt_lock);
64
65 /*
66 * list of card production ids
67 */
68 static const int s1d13xxxfb_prod_ids[] = {
69 S1D13505_PROD_ID,
70 S1D13506_PROD_ID,
71 S1D13806_PROD_ID,
72 };
73
74 /*
75 * List of card strings
76 */
77 static const char *s1d13xxxfb_prod_names[] = {
78 "S1D13505",
79 "S1D13506",
80 "S1D13806",
81 };
82
83 /*
84 * here we define the default struct fb_fix_screeninfo
85 */
86 static const struct fb_fix_screeninfo s1d13xxxfb_fix = {
87 .id = S1D_FBID,
88 .type = FB_TYPE_PACKED_PIXELS,
89 .visual = FB_VISUAL_PSEUDOCOLOR,
90 .xpanstep = 0,
91 .ypanstep = 1,
92 .ywrapstep = 0,
93 .accel = FB_ACCEL_NONE,
94 };
95
96 static inline u8
97 s1d13xxxfb_readreg(struct s1d13xxxfb_par *par, u16 regno)
98 {
99 return readb(par->regs + regno);
100 }
101
102 static inline void
103 s1d13xxxfb_writereg(struct s1d13xxxfb_par *par, u16 regno, u8 value)
104 {
105 writeb(value, par->regs + regno);
106 }
107
108 static inline void
109 s1d13xxxfb_runinit(struct s1d13xxxfb_par *par,
110 const struct s1d13xxxfb_regval *initregs,
111 const unsigned int size)
112 {
113 int i;
114
115 for (i = 0; i < size; i++) {
116 if ((initregs[i].addr == S1DREG_DELAYOFF) ||
117 (initregs[i].addr == S1DREG_DELAYON))
118 mdelay((int)initregs[i].value);
119 else {
120 s1d13xxxfb_writereg(par, initregs[i].addr, initregs[i].value);
121 }
122 }
123
124 /* make sure the hardware can cope with us */
125 mdelay(1);
126 }
127
128 static inline void
129 lcd_enable(struct s1d13xxxfb_par *par, int enable)
130 {
131 u8 mode = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
132
133 if (enable)
134 mode |= 0x01;
135 else
136 mode &= ~0x01;
137
138 s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, mode);
139 }
140
141 static inline void
142 crt_enable(struct s1d13xxxfb_par *par, int enable)
143 {
144 u8 mode = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
145
146 if (enable)
147 mode |= 0x02;
148 else
149 mode &= ~0x02;
150
151 s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, mode);
152 }
153
154
155 /*************************************************************
156 framebuffer control functions
157 *************************************************************/
158 static inline void
159 s1d13xxxfb_setup_pseudocolour(struct fb_info *info)
160 {
161 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
162
163 info->var.red.length = 4;
164 info->var.green.length = 4;
165 info->var.blue.length = 4;
166 }
167
168 static inline void
169 s1d13xxxfb_setup_truecolour(struct fb_info *info)
170 {
171 info->fix.visual = FB_VISUAL_TRUECOLOR;
172 info->var.bits_per_pixel = 16;
173
174 info->var.red.length = 5;
175 info->var.red.offset = 11;
176
177 info->var.green.length = 6;
178 info->var.green.offset = 5;
179
180 info->var.blue.length = 5;
181 info->var.blue.offset = 0;
182 }
183
184 /**
185 * s1d13xxxfb_set_par - Alters the hardware state.
186 * @info: frame buffer structure
187 *
188 * Using the fb_var_screeninfo in fb_info we set the depth of the
189 * framebuffer. This function alters the par AND the
190 * fb_fix_screeninfo stored in fb_info. It doesn't not alter var in
191 * fb_info since we are using that data. This means we depend on the
192 * data in var inside fb_info to be supported by the hardware.
193 * xxxfb_check_var is always called before xxxfb_set_par to ensure this.
194 *
195 * XXX TODO: write proper s1d13xxxfb_check_var(), without which that
196 * function is quite useless.
197 */
198 static int
199 s1d13xxxfb_set_par(struct fb_info *info)
200 {
201 struct s1d13xxxfb_par *s1dfb = info->par;
202 unsigned int val;
203
204 dbg("s1d13xxxfb_set_par: bpp=%d\n", info->var.bits_per_pixel);
205
206 if ((s1dfb->display & 0x01)) /* LCD */
207 val = s1d13xxxfb_readreg(s1dfb, S1DREG_LCD_DISP_MODE); /* read colour control */
208 else /* CRT */
209 val = s1d13xxxfb_readreg(s1dfb, S1DREG_CRT_DISP_MODE); /* read colour control */
210
211 val &= ~0x07;
212
213 switch (info->var.bits_per_pixel) {
214 case 4:
215 dbg("pseudo colour 4\n");
216 s1d13xxxfb_setup_pseudocolour(info);
217 val |= 2;
218 break;
219 case 8:
220 dbg("pseudo colour 8\n");
221 s1d13xxxfb_setup_pseudocolour(info);
222 val |= 3;
223 break;
224 case 16:
225 dbg("true colour\n");
226 s1d13xxxfb_setup_truecolour(info);
227 val |= 5;
228 break;
229
230 default:
231 dbg("bpp not supported!\n");
232 return -EINVAL;
233 }
234
235 dbg("writing %02x to display mode register\n", val);
236
237 if ((s1dfb->display & 0x01)) /* LCD */
238 s1d13xxxfb_writereg(s1dfb, S1DREG_LCD_DISP_MODE, val);
239 else /* CRT */
240 s1d13xxxfb_writereg(s1dfb, S1DREG_CRT_DISP_MODE, val);
241
242 info->fix.line_length = info->var.xres * info->var.bits_per_pixel;
243 info->fix.line_length /= 8;
244
245 dbg("setting line_length to %d\n", info->fix.line_length);
246
247 dbg("done setup\n");
248
249 return 0;
250 }
251
252 /**
253 * s1d13xxxfb_setcolreg - sets a color register.
254 * @regno: Which register in the CLUT we are programming
255 * @red: The red value which can be up to 16 bits wide
256 * @green: The green value which can be up to 16 bits wide
257 * @blue: The blue value which can be up to 16 bits wide.
258 * @transp: If supported the alpha value which can be up to 16 bits wide.
259 * @info: frame buffer info structure
260 *
261 * Returns negative errno on error, or zero on success.
262 */
263 static int
264 s1d13xxxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
265 u_int transp, struct fb_info *info)
266 {
267 struct s1d13xxxfb_par *s1dfb = info->par;
268 unsigned int pseudo_val;
269
270 if (regno >= S1D_PALETTE_SIZE)
271 return -EINVAL;
272
273 dbg("s1d13xxxfb_setcolreg: %d: rgb=%d,%d,%d, tr=%d\n",
274 regno, red, green, blue, transp);
275
276 if (info->var.grayscale)
277 red = green = blue = (19595*red + 38470*green + 7471*blue) >> 16;
278
279 switch (info->fix.visual) {
280 case FB_VISUAL_TRUECOLOR:
281 if (regno >= 16)
282 return -EINVAL;
283
284 /* deal with creating pseudo-palette entries */
285
286 pseudo_val = (red >> 11) << info->var.red.offset;
287 pseudo_val |= (green >> 10) << info->var.green.offset;
288 pseudo_val |= (blue >> 11) << info->var.blue.offset;
289
290 dbg("s1d13xxxfb_setcolreg: pseudo %d, val %08x\n",
291 regno, pseudo_val);
292
293 ((u32 *)info->pseudo_palette)[regno] = pseudo_val;
294
295 break;
296 case FB_VISUAL_PSEUDOCOLOR:
297 s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_ADDR, regno);
298 s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_DATA, red);
299 s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_DATA, green);
300 s1d13xxxfb_writereg(s1dfb, S1DREG_LKUP_DATA, blue);
301
302 break;
303 default:
304 return -ENOSYS;
305 }
306
307 dbg("s1d13xxxfb_setcolreg: done\n");
308
309 return 0;
310 }
311
312 /**
313 * s1d13xxxfb_blank - blanks the display.
314 * @blank_mode: the blank mode we want.
315 * @info: frame buffer structure that represents a single frame buffer
316 *
317 * Blank the screen if blank_mode != 0, else unblank. Return 0 if
318 * blanking succeeded, != 0 if un-/blanking failed due to e.g. a
319 * video mode which doesn't support it. Implements VESA suspend
320 * and powerdown modes on hardware that supports disabling hsync/vsync:
321 * blank_mode == 2: suspend vsync
322 * blank_mode == 3: suspend hsync
323 * blank_mode == 4: powerdown
324 *
325 * Returns negative errno on error, or zero on success.
326 */
327 static int
328 s1d13xxxfb_blank(int blank_mode, struct fb_info *info)
329 {
330 struct s1d13xxxfb_par *par = info->par;
331
332 dbg("s1d13xxxfb_blank: blank=%d, info=%p\n", blank_mode, info);
333
334 switch (blank_mode) {
335 case FB_BLANK_UNBLANK:
336 case FB_BLANK_NORMAL:
337 if ((par->display & 0x01) != 0)
338 lcd_enable(par, 1);
339 if ((par->display & 0x02) != 0)
340 crt_enable(par, 1);
341 break;
342 case FB_BLANK_VSYNC_SUSPEND:
343 case FB_BLANK_HSYNC_SUSPEND:
344 break;
345 case FB_BLANK_POWERDOWN:
346 lcd_enable(par, 0);
347 crt_enable(par, 0);
348 break;
349 default:
350 return -EINVAL;
351 }
352
353 /* let fbcon do a soft blank for us */
354 return ((blank_mode == FB_BLANK_NORMAL) ? 1 : 0);
355 }
356
357 /**
358 * s1d13xxxfb_pan_display - Pans the display.
359 * @var: frame buffer variable screen structure
360 * @info: frame buffer structure that represents a single frame buffer
361 *
362 * Pan (or wrap, depending on the `vmode' field) the display using the
363 * `yoffset' field of the `var' structure (`xoffset' not yet supported).
364 * If the values don't fit, return -EINVAL.
365 *
366 * Returns negative errno on error, or zero on success.
367 */
368 static int
369 s1d13xxxfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
370 {
371 struct s1d13xxxfb_par *par = info->par;
372 u32 start;
373
374 if (var->xoffset != 0) /* not yet ... */
375 return -EINVAL;
376
377 if (var->yoffset + info->var.yres > info->var.yres_virtual)
378 return -EINVAL;
379
380 start = (info->fix.line_length >> 1) * var->yoffset;
381
382 if ((par->display & 0x01)) {
383 /* LCD */
384 s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START0, (start & 0xff));
385 s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START1, ((start >> 8) & 0xff));
386 s1d13xxxfb_writereg(par, S1DREG_LCD_DISP_START2, ((start >> 16) & 0x0f));
387 } else {
388 /* CRT */
389 s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START0, (start & 0xff));
390 s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START1, ((start >> 8) & 0xff));
391 s1d13xxxfb_writereg(par, S1DREG_CRT_DISP_START2, ((start >> 16) & 0x0f));
392 }
393
394 return 0;
395 }
396
397 /************************************************************
398 functions to handle bitblt acceleration
399 ************************************************************/
400
401 /**
402 * bltbit_wait_bitclear - waits for change in register value
403 * @info : frambuffer structure
404 * @bit : value currently in register
405 * @timeout : ...
406 *
407 * waits until value changes FROM bit
408 *
409 */
410 static u8
411 bltbit_wait_bitclear(struct fb_info *info, u8 bit, int timeout)
412 {
413 while (s1d13xxxfb_readreg(info->par, S1DREG_BBLT_CTL0) & bit) {
414 udelay(10);
415 if (!--timeout) {
416 dbg_blit("wait_bitclear timeout\n");
417 break;
418 }
419 }
420
421 return timeout;
422 }
423
424 /*
425 * s1d13xxxfb_bitblt_copyarea - accelerated copyarea function
426 * @info : framebuffer structure
427 * @area : fb_copyarea structure
428 *
429 * supports (atleast) S1D13506
430 *
431 */
432 static void
433 s1d13xxxfb_bitblt_copyarea(struct fb_info *info, const struct fb_copyarea *area)
434 {
435 u32 dst, src;
436 u32 stride;
437 u16 reverse = 0;
438 u16 sx = area->sx, sy = area->sy;
439 u16 dx = area->dx, dy = area->dy;
440 u16 width = area->width, height = area->height;
441 u16 bpp;
442
443 spin_lock(&s1d13xxxfb_bitblt_lock);
444
445 /* bytes per xres line */
446 bpp = (info->var.bits_per_pixel >> 3);
447 stride = bpp * info->var.xres;
448
449 /* reverse, calculate the last pixel in rectangle */
450 if ((dy > sy) || ((dy == sy) && (dx >= sx))) {
451 dst = (((dy + height - 1) * stride) + (bpp * (dx + width - 1)));
452 src = (((sy + height - 1) * stride) + (bpp * (sx + width - 1)));
453 reverse = 1;
454 /* not reverse, calculate the first pixel in rectangle */
455 } else { /* (y * xres) + (bpp * x) */
456 dst = (dy * stride) + (bpp * dx);
457 src = (sy * stride) + (bpp * sx);
458 }
459
460 /* set source address */
461 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_SRC_START0, (src & 0xff));
462 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_SRC_START1, (src >> 8) & 0x00ff);
463 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_SRC_START2, (src >> 16) & 0x00ff);
464
465 /* set destination address */
466 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START0, (dst & 0xff));
467 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START1, (dst >> 8) & 0x00ff);
468 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START2, (dst >> 16) & 0x00ff);
469
470 /* program height and width */
471 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_WIDTH0, (width & 0xff) - 1);
472 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_WIDTH1, (width >> 8));
473
474 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_HEIGHT0, (height & 0xff) - 1);
475 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_HEIGHT1, (height >> 8));
476
477 /* negative direction ROP */
478 if (reverse == 1) {
479 dbg_blit("(copyarea) negative rop\n");
480 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_OP, 0x03);
481 } else /* positive direction ROP */ {
482 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_OP, 0x02);
483 dbg_blit("(copyarea) positive rop\n");
484 }
485
486 /* set for rectangel mode and not linear */
487 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL0, 0x0);
488
489 /* setup the bpp 1 = 16bpp, 0 = 8bpp*/
490 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL1, (bpp >> 1));
491
492 /* set words per xres */
493 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_MEM_OFF0, (stride >> 1) & 0xff);
494 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_MEM_OFF1, (stride >> 9));
495
496 dbg_blit("(copyarea) dx=%d, dy=%d\n", dx, dy);
497 dbg_blit("(copyarea) sx=%d, sy=%d\n", sx, sy);
498 dbg_blit("(copyarea) width=%d, height=%d\n", width - 1, height - 1);
499 dbg_blit("(copyarea) stride=%d\n", stride);
500 dbg_blit("(copyarea) bpp=%d=0x0%d, mem_offset1=%d, mem_offset2=%d\n", bpp, (bpp >> 1),
501 (stride >> 1) & 0xff, stride >> 9);
502
503 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CC_EXP, 0x0c);
504
505 /* initialize the engine */
506 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL0, 0x80);
507
508 /* wait to complete */
509 bltbit_wait_bitclear(info, 0x80, 8000);
510
511 spin_unlock(&s1d13xxxfb_bitblt_lock);
512 }
513
514 /**
515 * s1d13xxxfb_bitblt_solidfill - accelerated solidfill function
516 * @info : framebuffer structure
517 * @rect : fb_fillrect structure
518 *
519 * supports (atleast 13506)
520 *
521 **/
522 static void
523 s1d13xxxfb_bitblt_solidfill(struct fb_info *info, const struct fb_fillrect *rect)
524 {
525 u32 screen_stride, dest;
526 u32 fg;
527 u16 bpp = (info->var.bits_per_pixel >> 3);
528
529 /* grab spinlock */
530 spin_lock(&s1d13xxxfb_bitblt_lock);
531
532 /* bytes per x width */
533 screen_stride = (bpp * info->var.xres);
534
535 /* bytes to starting point */
536 dest = ((rect->dy * screen_stride) + (bpp * rect->dx));
537
538 dbg_blit("(solidfill) dx=%d, dy=%d, stride=%d, dest=%d\n"
539 "(solidfill) : rect_width=%d, rect_height=%d\n",
540 rect->dx, rect->dy, screen_stride, dest,
541 rect->width - 1, rect->height - 1);
542
543 dbg_blit("(solidfill) : xres=%d, yres=%d, bpp=%d\n",
544 info->var.xres, info->var.yres,
545 info->var.bits_per_pixel);
546 dbg_blit("(solidfill) : rop=%d\n", rect->rop);
547
548 /* We split the destination into the three registers */
549 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START0, (dest & 0x00ff));
550 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START1, ((dest >> 8) & 0x00ff));
551 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START2, ((dest >> 16) & 0x00ff));
552
553 /* give information regarding rectangel width */
554 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_WIDTH0, ((rect->width) & 0x00ff) - 1);
555 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_WIDTH1, (rect->width >> 8));
556
557 /* give information regarding rectangel height */
558 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_HEIGHT0, ((rect->height) & 0x00ff) - 1);
559 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_HEIGHT1, (rect->height >> 8));
560
561 if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
562 info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
563 fg = ((u32 *)info->pseudo_palette)[rect->color];
564 dbg_blit("(solidfill) truecolor/directcolor\n");
565 dbg_blit("(solidfill) pseudo_palette[%d] = %d\n", rect->color, fg);
566 } else {
567 fg = rect->color;
568 dbg_blit("(solidfill) color = %d\n", rect->color);
569 }
570
571 /* set foreground color */
572 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_FGC0, (fg & 0xff));
573 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_FGC1, (fg >> 8) & 0xff);
574
575 /* set rectangual region of memory (rectangle and not linear) */
576 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL0, 0x0);
577
578 /* set operation mode SOLID_FILL */
579 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_OP, BBLT_SOLID_FILL);
580
581 /* set bits per pixel (1 = 16bpp, 0 = 8bpp) */
582 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL1, (info->var.bits_per_pixel >> 4));
583
584 /* set the memory offset for the bblt in word sizes */
585 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_MEM_OFF0, (screen_stride >> 1) & 0x00ff);
586 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_MEM_OFF1, (screen_stride >> 9));
587
588 /* and away we go.... */
589 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL0, 0x80);
590
591 /* wait until its done */
592 bltbit_wait_bitclear(info, 0x80, 8000);
593
594 /* let others play */
595 spin_unlock(&s1d13xxxfb_bitblt_lock);
596 }
597
598 /* framebuffer information structures */
599 static const struct fb_ops s1d13xxxfb_fbops = {
600 .owner = THIS_MODULE,
601 FB_DEFAULT_IOMEM_OPS,
602 .fb_set_par = s1d13xxxfb_set_par,
603 .fb_setcolreg = s1d13xxxfb_setcolreg,
604 .fb_blank = s1d13xxxfb_blank,
605 .fb_pan_display = s1d13xxxfb_pan_display,
606 };
607
608 static const struct fb_ops s1d13xxxfb_fbops_s1d13506 = {
609 .owner = THIS_MODULE,
610 __FB_DEFAULT_IOMEM_OPS_RDWR,
611 .fb_set_par = s1d13xxxfb_set_par,
612 .fb_setcolreg = s1d13xxxfb_setcolreg,
613 .fb_blank = s1d13xxxfb_blank,
614 .fb_pan_display = s1d13xxxfb_pan_display,
615 .fb_fillrect = s1d13xxxfb_bitblt_solidfill,
616 .fb_copyarea = s1d13xxxfb_bitblt_copyarea,
617 .fb_imageblit = cfb_imageblit,
618 __FB_DEFAULT_IOMEM_OPS_MMAP,
619 };
620
621 static int s1d13xxxfb_width_tab[2][4] = {
622 {4, 8, 16, -1},
623 {9, 12, 18, -1},
624 };
625
626 /**
627 * s1d13xxxfb_fetch_hw_state - Configure the framebuffer according to
628 * hardware setup.
629 * @info: frame buffer structure
630 *
631 * We setup the framebuffer structures according to the current
632 * hardware setup. On some machines, the BIOS will have filled
633 * the chip registers with such info, on others, these values will
634 * have been written in some init procedure. In any case, the
635 * software values needs to match the hardware ones. This is what
636 * this function ensures.
637 *
638 * Note: some of the hardcoded values here might need some love to
639 * work on various chips, and might need to no longer be hardcoded.
640 */
641 static void s1d13xxxfb_fetch_hw_state(struct fb_info *info)
642 {
643 struct fb_var_screeninfo *var = &info->var;
644 struct fb_fix_screeninfo *fix = &info->fix;
645 struct s1d13xxxfb_par *par = info->par;
646 u8 panel, display;
647 u16 offset;
648 u32 xres, yres;
649 u32 xres_virtual, yres_virtual;
650 int bpp, lcd_bpp;
651 int is_color, is_dual, is_tft;
652 int lcd_enabled, crt_enabled;
653
654 fix->type = FB_TYPE_PACKED_PIXELS;
655
656 /* general info */
657 par->display = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
658 crt_enabled = (par->display & 0x02) != 0;
659 lcd_enabled = (par->display & 0x01) != 0;
660
661 if (lcd_enabled && crt_enabled)
662 printk(KERN_WARNING PFX "Warning: LCD and CRT detected, using LCD\n");
663
664 if (lcd_enabled)
665 display = s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_MODE);
666 else /* CRT */
667 display = s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_MODE);
668
669 bpp = display & 0x07;
670
671 switch (bpp) {
672 case 2: /* 4 bpp */
673 case 3: /* 8 bpp */
674 var->bits_per_pixel = 8;
675 var->red.offset = var->green.offset = var->blue.offset = 0;
676 var->red.length = var->green.length = var->blue.length = 8;
677 break;
678 case 5: /* 16 bpp */
679 s1d13xxxfb_setup_truecolour(info);
680 break;
681 default:
682 dbg("bpp: %i\n", bpp);
683 }
684 fb_alloc_cmap(&info->cmap, 256, 0);
685
686 /* LCD info */
687 panel = s1d13xxxfb_readreg(par, S1DREG_PANEL_TYPE);
688 is_color = (panel & 0x04) != 0;
689 is_dual = (panel & 0x02) != 0;
690 is_tft = (panel & 0x01) != 0;
691 lcd_bpp = s1d13xxxfb_width_tab[is_tft][(panel >> 4) & 3];
692
693 if (lcd_enabled) {
694 xres = (s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_HWIDTH) + 1) * 8;
695 yres = (s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_VHEIGHT0) +
696 ((s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_VHEIGHT1) & 0x03) << 8) + 1);
697
698 offset = (s1d13xxxfb_readreg(par, S1DREG_LCD_MEM_OFF0) +
699 ((s1d13xxxfb_readreg(par, S1DREG_LCD_MEM_OFF1) & 0x7) << 8));
700 } else { /* crt */
701 xres = (s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_HWIDTH) + 1) * 8;
702 yres = (s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_VHEIGHT0) +
703 ((s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_VHEIGHT1) & 0x03) << 8) + 1);
704
705 offset = (s1d13xxxfb_readreg(par, S1DREG_CRT_MEM_OFF0) +
706 ((s1d13xxxfb_readreg(par, S1DREG_CRT_MEM_OFF1) & 0x7) << 8));
707 }
708 xres_virtual = offset * 16 / var->bits_per_pixel;
709 yres_virtual = fix->smem_len / (offset * 2);
710
711 var->xres = xres;
712 var->yres = yres;
713 var->xres_virtual = xres_virtual;
714 var->yres_virtual = yres_virtual;
715 var->xoffset = var->yoffset = 0;
716
717 fix->line_length = offset * 2;
718
719 var->grayscale = !is_color;
720
721 var->activate = FB_ACTIVATE_NOW;
722
723 dbg(PFX "bpp=%d, lcd_bpp=%d, "
724 "crt_enabled=%d, lcd_enabled=%d\n",
725 var->bits_per_pixel, lcd_bpp, crt_enabled, lcd_enabled);
726 dbg(PFX "xres=%d, yres=%d, vxres=%d, vyres=%d "
727 "is_color=%d, is_dual=%d, is_tft=%d\n",
728 xres, yres, xres_virtual, yres_virtual, is_color, is_dual, is_tft);
729 }
730
731 static void __s1d13xxxfb_remove(struct platform_device *pdev)
732 {
733 struct fb_info *info = platform_get_drvdata(pdev);
734 struct s1d13xxxfb_par *par = NULL;
735
736 if (info) {
737 par = info->par;
738 if (par && par->regs) {
739 /* disable output & enable powersave */
740 s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, 0x00);
741 s1d13xxxfb_writereg(par, S1DREG_PS_CNF, 0x11);
742 iounmap(par->regs);
743 }
744
745 fb_dealloc_cmap(&info->cmap);
746
747 if (info->screen_base)
748 iounmap(info->screen_base);
749
750 framebuffer_release(info);
751 }
752
753 release_mem_region(pdev->resource[0].start,
754 resource_size(&pdev->resource[0]));
755 release_mem_region(pdev->resource[1].start,
756 resource_size(&pdev->resource[1]));
757 }
758
759 static void s1d13xxxfb_remove(struct platform_device *pdev)
760 {
761 struct fb_info *info = platform_get_drvdata(pdev);
762
763 unregister_framebuffer(info);
764 __s1d13xxxfb_remove(pdev);
765 }
766
767 static int s1d13xxxfb_probe(struct platform_device *pdev)
768 {
769 struct s1d13xxxfb_par *default_par;
770 struct fb_info *info;
771 struct s1d13xxxfb_pdata *pdata = NULL;
772 int ret = 0;
773 int i;
774 u8 revision, prod_id;
775
776 dbg("probe called: device is %p\n", pdev);
777
778 printk(KERN_INFO "Epson S1D13XXX FB Driver\n");
779
780 /* enable platform-dependent hardware glue, if any */
781 if (dev_get_platdata(&pdev->dev))
782 pdata = dev_get_platdata(&pdev->dev);
783
784 if (pdata && pdata->platform_init_video)
785 pdata->platform_init_video();
786
787 if (pdev->num_resources != 2) {
788 dev_err(&pdev->dev, "invalid num_resources: %i\n",
789 pdev->num_resources);
790 ret = -ENODEV;
791 goto bail;
792 }
793
794 /* resource[0] is VRAM, resource[1] is registers */
795 if (pdev->resource[0].flags != IORESOURCE_MEM
796 || pdev->resource[1].flags != IORESOURCE_MEM) {
797 dev_err(&pdev->dev, "invalid resource type\n");
798 ret = -ENODEV;
799 goto bail;
800 }
801
802 if (!request_mem_region(pdev->resource[0].start,
803 resource_size(&pdev->resource[0]), "s1d13xxxfb mem")) {
804 dev_dbg(&pdev->dev, "request_mem_region failed\n");
805 ret = -EBUSY;
806 goto bail;
807 }
808
809 if (!request_mem_region(pdev->resource[1].start,
810 resource_size(&pdev->resource[1]), "s1d13xxxfb regs")) {
811 dev_dbg(&pdev->dev, "request_mem_region failed\n");
812 ret = -EBUSY;
813 goto bail;
814 }
815
816 info = framebuffer_alloc(sizeof(struct s1d13xxxfb_par) + sizeof(u32) * 256, &pdev->dev);
817 if (!info) {
818 ret = -ENOMEM;
819 goto bail;
820 }
821
822 platform_set_drvdata(pdev, info);
823 default_par = info->par;
824 default_par->regs = ioremap(pdev->resource[1].start,
825 resource_size(&pdev->resource[1]));
826 if (!default_par->regs) {
827 printk(KERN_ERR PFX "unable to map registers\n");
828 ret = -ENOMEM;
829 goto bail;
830 }
831 info->pseudo_palette = default_par->pseudo_palette;
832
833 info->screen_base = ioremap(pdev->resource[0].start,
834 resource_size(&pdev->resource[0]));
835
836 if (!info->screen_base) {
837 printk(KERN_ERR PFX "unable to map framebuffer\n");
838 ret = -ENOMEM;
839 goto bail;
840 }
841
842 /* production id is top 6 bits */
843 prod_id = s1d13xxxfb_readreg(default_par, S1DREG_REV_CODE) >> 2;
844 /* revision id is lower 2 bits */
845 revision = s1d13xxxfb_readreg(default_par, S1DREG_REV_CODE) & 0x3;
846 ret = -ENODEV;
847
848 for (i = 0; i < ARRAY_SIZE(s1d13xxxfb_prod_ids); i++) {
849 if (prod_id == s1d13xxxfb_prod_ids[i]) {
850 /* looks like we got it in our list */
851 default_par->prod_id = prod_id;
852 default_par->revision = revision;
853 ret = 0;
854 break;
855 }
856 }
857
858 if (!ret) {
859 printk(KERN_INFO PFX "chip production id %i = %s\n",
860 prod_id, s1d13xxxfb_prod_names[i]);
861 printk(KERN_INFO PFX "chip revision %i\n", revision);
862 } else {
863 printk(KERN_INFO PFX
864 "unknown chip production id %i, revision %i\n",
865 prod_id, revision);
866 printk(KERN_INFO PFX "please contact maintainer\n");
867 goto bail;
868 }
869
870 info->fix = s1d13xxxfb_fix;
871 info->fix.mmio_start = pdev->resource[1].start;
872 info->fix.mmio_len = resource_size(&pdev->resource[1]);
873 info->fix.smem_start = pdev->resource[0].start;
874 info->fix.smem_len = resource_size(&pdev->resource[0]);
875
876 printk(KERN_INFO PFX "regs mapped at 0x%p, fb %d KiB mapped at 0x%p\n",
877 default_par->regs, info->fix.smem_len / 1024, info->screen_base);
878
879 info->par = default_par;
880
881 switch(prod_id) {
882 case S1D13506_PROD_ID: /* activate acceleration */
883 info->flags = FBINFO_HWACCEL_YPAN |
884 FBINFO_HWACCEL_FILLRECT | FBINFO_HWACCEL_COPYAREA;
885 info->fbops = &s1d13xxxfb_fbops_s1d13506;
886 break;
887 default:
888 info->flags = FBINFO_HWACCEL_YPAN;
889 info->fbops = &s1d13xxxfb_fbops;
890 break;
891 }
892
893 /* perform "manual" chip initialization, if needed */
894 if (pdata && pdata->initregs)
895 s1d13xxxfb_runinit(info->par, pdata->initregs, pdata->initregssize);
896
897 s1d13xxxfb_fetch_hw_state(info);
898
899 if (register_framebuffer(info) < 0) {
900 ret = -EINVAL;
901 goto bail;
902 }
903
904 fb_info(info, "%s frame buffer device\n", info->fix.id);
905
906 return 0;
907
908 bail:
909 __s1d13xxxfb_remove(pdev);
910 return ret;
911
912 }
913
914 #ifdef CONFIG_PM
915 static int s1d13xxxfb_suspend(struct platform_device *dev, pm_message_t state)
916 {
917 struct fb_info *info = platform_get_drvdata(dev);
918 struct s1d13xxxfb_par *s1dfb = info->par;
919 struct s1d13xxxfb_pdata *pdata = NULL;
920
921 /* disable display */
922 lcd_enable(s1dfb, 0);
923 crt_enable(s1dfb, 0);
924
925 if (dev_get_platdata(&dev->dev))
926 pdata = dev_get_platdata(&dev->dev);
927
928 #if 0
929 if (!s1dfb->disp_save)
930 s1dfb->disp_save = kmalloc(info->fix.smem_len, GFP_KERNEL);
931
932 if (!s1dfb->disp_save) {
933 printk(KERN_ERR PFX "no memory to save screen\n");
934 return -ENOMEM;
935 }
936
937 memcpy_fromio(s1dfb->disp_save, info->screen_base, info->fix.smem_len);
938 #else
939 s1dfb->disp_save = NULL;
940 #endif
941
942 if (!s1dfb->regs_save)
943 s1dfb->regs_save = kmalloc(info->fix.mmio_len, GFP_KERNEL);
944
945 if (!s1dfb->regs_save) {
946 printk(KERN_ERR PFX "no memory to save registers");
947 return -ENOMEM;
948 }
949
950 /* backup all registers */
951 memcpy_fromio(s1dfb->regs_save, s1dfb->regs, info->fix.mmio_len);
952
953 /* now activate power save mode */
954 s1d13xxxfb_writereg(s1dfb, S1DREG_PS_CNF, 0x11);
955
956 if (pdata && pdata->platform_suspend_video)
957 return pdata->platform_suspend_video();
958 else
959 return 0;
960 }
961
962 static int s1d13xxxfb_resume(struct platform_device *dev)
963 {
964 struct fb_info *info = platform_get_drvdata(dev);
965 struct s1d13xxxfb_par *s1dfb = info->par;
966 struct s1d13xxxfb_pdata *pdata = NULL;
967
968 /* awaken the chip */
969 s1d13xxxfb_writereg(s1dfb, S1DREG_PS_CNF, 0x10);
970
971 /* do not let go until SDRAM "wakes up" */
972 while ((s1d13xxxfb_readreg(s1dfb, S1DREG_PS_STATUS) & 0x01))
973 udelay(10);
974
975 if (dev_get_platdata(&dev->dev))
976 pdata = dev_get_platdata(&dev->dev);
977
978 if (s1dfb->regs_save) {
979 /* will write RO regs, *should* get away with it :) */
980 memcpy_toio(s1dfb->regs, s1dfb->regs_save, info->fix.mmio_len);
981 kfree(s1dfb->regs_save);
982 }
983
984 if (s1dfb->disp_save) {
985 memcpy_toio(info->screen_base, s1dfb->disp_save,
986 info->fix.smem_len);
987 kfree(s1dfb->disp_save); /* XXX kmalloc()'d when? */
988 }
989
990 if ((s1dfb->display & 0x01) != 0)
991 lcd_enable(s1dfb, 1);
992 if ((s1dfb->display & 0x02) != 0)
993 crt_enable(s1dfb, 1);
994
995 if (pdata && pdata->platform_resume_video)
996 return pdata->platform_resume_video();
997 else
998 return 0;
999 }
1000 #endif /* CONFIG_PM */
1001
1002 static struct platform_driver s1d13xxxfb_driver = {
1003 .probe = s1d13xxxfb_probe,
1004 .remove = s1d13xxxfb_remove,
1005 #ifdef CONFIG_PM
1006 .suspend = s1d13xxxfb_suspend,
1007 .resume = s1d13xxxfb_resume,
1008 #endif
1009 .driver = {
1010 .name = S1D_DEVICENAME,
1011 },
1012 };
1013
1014
1015 static int __init
1016 s1d13xxxfb_init(void)
1017 {
1018
1019 #ifndef MODULE
1020 if (fb_get_options("s1d13xxxfb", NULL))
1021 return -ENODEV;
1022 #endif
1023
1024 return platform_driver_register(&s1d13xxxfb_driver);
1025 }
1026
1027
1028 static void __exit
1029 s1d13xxxfb_exit(void)
1030 {
1031 platform_driver_unregister(&s1d13xxxfb_driver);
1032 }
1033
1034 module_init(s1d13xxxfb_init);
1035 module_exit(s1d13xxxfb_exit);
1036
1037
1038 MODULE_LICENSE("GPL");
1039 MODULE_DESCRIPTION("Framebuffer driver for S1D13xxx devices");
1040 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>, Thibaut VARENE <varenet@parisc-linux.org>");
Kernel DRM miscellaneous fixes and cross-tree changes