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Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / video / fbdev / s1d13xxxfb.c
blob4541afcf9386ec25d640772de014c02d3f4d2869
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 { } 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 *
516 * s1d13xxxfb_bitblt_solidfill - accelerated solidfill function
517 * @info : framebuffer structure
518 * @rect : fb_fillrect structure
519 *
520 * supports (atleast 13506)
521 *
522 **/
523 static void
524 s1d13xxxfb_bitblt_solidfill(struct fb_info *info, const struct fb_fillrect *rect)
525 {
526 u32 screen_stride, dest;
527 u32 fg;
528 u16 bpp = (info->var.bits_per_pixel >> 3);
529
530 /* grab spinlock */
531 spin_lock(&s1d13xxxfb_bitblt_lock);
532
533 /* bytes per x width */
534 screen_stride = (bpp * info->var.xres);
535
536 /* bytes to starting point */
537 dest = ((rect->dy * screen_stride) + (bpp * rect->dx));
538
539 dbg_blit("(solidfill) dx=%d, dy=%d, stride=%d, dest=%d\n"
540 "(solidfill) : rect_width=%d, rect_height=%d\n",
541 rect->dx, rect->dy, screen_stride, dest,
542 rect->width - 1, rect->height - 1);
543
544 dbg_blit("(solidfill) : xres=%d, yres=%d, bpp=%d\n",
545 info->var.xres, info->var.yres,
546 info->var.bits_per_pixel);
547 dbg_blit("(solidfill) : rop=%d\n", rect->rop);
548
549 /* We split the destination into the three registers */
550 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START0, (dest & 0x00ff));
551 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START1, ((dest >> 8) & 0x00ff));
552 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_DST_START2, ((dest >> 16) & 0x00ff));
553
554 /* give information regarding rectangel width */
555 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_WIDTH0, ((rect->width) & 0x00ff) - 1);
556 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_WIDTH1, (rect->width >> 8));
557
558 /* give information regarding rectangel height */
559 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_HEIGHT0, ((rect->height) & 0x00ff) - 1);
560 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_HEIGHT1, (rect->height >> 8));
561
562 if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
563 info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
564 fg = ((u32 *)info->pseudo_palette)[rect->color];
565 dbg_blit("(solidfill) truecolor/directcolor\n");
566 dbg_blit("(solidfill) pseudo_palette[%d] = %d\n", rect->color, fg);
567 } else {
568 fg = rect->color;
569 dbg_blit("(solidfill) color = %d\n", rect->color);
570 }
571
572 /* set foreground color */
573 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_FGC0, (fg & 0xff));
574 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_FGC1, (fg >> 8) & 0xff);
575
576 /* set rectangual region of memory (rectangle and not linear) */
577 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL0, 0x0);
578
579 /* set operation mode SOLID_FILL */
580 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_OP, BBLT_SOLID_FILL);
581
582 /* set bits per pixel (1 = 16bpp, 0 = 8bpp) */
583 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL1, (info->var.bits_per_pixel >> 4));
584
585 /* set the memory offset for the bblt in word sizes */
586 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_MEM_OFF0, (screen_stride >> 1) & 0x00ff);
587 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_MEM_OFF1, (screen_stride >> 9));
588
589 /* and away we go.... */
590 s1d13xxxfb_writereg(info->par, S1DREG_BBLT_CTL0, 0x80);
591
592 /* wait until its done */
593 bltbit_wait_bitclear(info, 0x80, 8000);
594
595 /* let others play */
596 spin_unlock(&s1d13xxxfb_bitblt_lock);
597 }
598
599 /* framebuffer information structures */
600 static struct fb_ops s1d13xxxfb_fbops = {
601 .owner = THIS_MODULE,
602 .fb_set_par = s1d13xxxfb_set_par,
603 .fb_setcolreg = s1d13xxxfb_setcolreg,
604 .fb_blank = s1d13xxxfb_blank,
605
606 .fb_pan_display = s1d13xxxfb_pan_display,
607
608 /* gets replaced at chip detection time */
609 .fb_fillrect = cfb_fillrect,
610 .fb_copyarea = cfb_copyarea,
611 .fb_imageblit = cfb_imageblit,
612 };
613
614 static int s1d13xxxfb_width_tab[2][4] = {
615 {4, 8, 16, -1},
616 {9, 12, 18, -1},
617 };
618
619 /**
620 * s1d13xxxfb_fetch_hw_state - Configure the framebuffer according to
621 * hardware setup.
622 * @info: frame buffer structure
623 *
624 * We setup the framebuffer structures according to the current
625 * hardware setup. On some machines, the BIOS will have filled
626 * the chip registers with such info, on others, these values will
627 * have been written in some init procedure. In any case, the
628 * software values needs to match the hardware ones. This is what
629 * this function ensures.
630 *
631 * Note: some of the hardcoded values here might need some love to
632 * work on various chips, and might need to no longer be hardcoded.
633 */
634 static void s1d13xxxfb_fetch_hw_state(struct fb_info *info)
635 {
636 struct fb_var_screeninfo *var = &info->var;
637 struct fb_fix_screeninfo *fix = &info->fix;
638 struct s1d13xxxfb_par *par = info->par;
639 u8 panel, display;
640 u16 offset;
641 u32 xres, yres;
642 u32 xres_virtual, yres_virtual;
643 int bpp, lcd_bpp;
644 int is_color, is_dual, is_tft;
645 int lcd_enabled, crt_enabled;
646
647 fix->type = FB_TYPE_PACKED_PIXELS;
648
649 /* general info */
650 par->display = s1d13xxxfb_readreg(par, S1DREG_COM_DISP_MODE);
651 crt_enabled = (par->display & 0x02) != 0;
652 lcd_enabled = (par->display & 0x01) != 0;
653
654 if (lcd_enabled && crt_enabled)
655 printk(KERN_WARNING PFX "Warning: LCD and CRT detected, using LCD\n");
656
657 if (lcd_enabled)
658 display = s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_MODE);
659 else /* CRT */
660 display = s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_MODE);
661
662 bpp = display & 0x07;
663
664 switch (bpp) {
665 case 2: /* 4 bpp */
666 case 3: /* 8 bpp */
667 var->bits_per_pixel = 8;
668 var->red.offset = var->green.offset = var->blue.offset = 0;
669 var->red.length = var->green.length = var->blue.length = 8;
670 break;
671 case 5: /* 16 bpp */
672 s1d13xxxfb_setup_truecolour(info);
673 break;
674 default:
675 dbg("bpp: %i\n", bpp);
676 }
677 fb_alloc_cmap(&info->cmap, 256, 0);
678
679 /* LCD info */
680 panel = s1d13xxxfb_readreg(par, S1DREG_PANEL_TYPE);
681 is_color = (panel & 0x04) != 0;
682 is_dual = (panel & 0x02) != 0;
683 is_tft = (panel & 0x01) != 0;
684 lcd_bpp = s1d13xxxfb_width_tab[is_tft][(panel >> 4) & 3];
685
686 if (lcd_enabled) {
687 xres = (s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_HWIDTH) + 1) * 8;
688 yres = (s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_VHEIGHT0) +
689 ((s1d13xxxfb_readreg(par, S1DREG_LCD_DISP_VHEIGHT1) & 0x03) << 8) + 1);
690
691 offset = (s1d13xxxfb_readreg(par, S1DREG_LCD_MEM_OFF0) +
692 ((s1d13xxxfb_readreg(par, S1DREG_LCD_MEM_OFF1) & 0x7) << 8));
693 } else { /* crt */
694 xres = (s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_HWIDTH) + 1) * 8;
695 yres = (s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_VHEIGHT0) +
696 ((s1d13xxxfb_readreg(par, S1DREG_CRT_DISP_VHEIGHT1) & 0x03) << 8) + 1);
697
698 offset = (s1d13xxxfb_readreg(par, S1DREG_CRT_MEM_OFF0) +
699 ((s1d13xxxfb_readreg(par, S1DREG_CRT_MEM_OFF1) & 0x7) << 8));
700 }
701 xres_virtual = offset * 16 / var->bits_per_pixel;
702 yres_virtual = fix->smem_len / (offset * 2);
703
704 var->xres = xres;
705 var->yres = yres;
706 var->xres_virtual = xres_virtual;
707 var->yres_virtual = yres_virtual;
708 var->xoffset = var->yoffset = 0;
709
710 fix->line_length = offset * 2;
711
712 var->grayscale = !is_color;
713
714 var->activate = FB_ACTIVATE_NOW;
715
716 dbg(PFX "bpp=%d, lcd_bpp=%d, "
717 "crt_enabled=%d, lcd_enabled=%d\n",
718 var->bits_per_pixel, lcd_bpp, crt_enabled, lcd_enabled);
719 dbg(PFX "xres=%d, yres=%d, vxres=%d, vyres=%d "
720 "is_color=%d, is_dual=%d, is_tft=%d\n",
721 xres, yres, xres_virtual, yres_virtual, is_color, is_dual, is_tft);
722 }
723
724 static void __s1d13xxxfb_remove(struct platform_device *pdev)
725 {
726 struct fb_info *info = platform_get_drvdata(pdev);
727 struct s1d13xxxfb_par *par = NULL;
728
729 if (info) {
730 par = info->par;
731 if (par && par->regs) {
732 /* disable output & enable powersave */
733 s1d13xxxfb_writereg(par, S1DREG_COM_DISP_MODE, 0x00);
734 s1d13xxxfb_writereg(par, S1DREG_PS_CNF, 0x11);
735 iounmap(par->regs);
736 }
737
738 fb_dealloc_cmap(&info->cmap);
739
740 if (info->screen_base)
741 iounmap(info->screen_base);
742
743 framebuffer_release(info);
744 }
745
746 release_mem_region(pdev->resource[0].start,
747 resource_size(&pdev->resource[0]));
748 release_mem_region(pdev->resource[1].start,
749 resource_size(&pdev->resource[1]));
750 }
751
752 static int s1d13xxxfb_remove(struct platform_device *pdev)
753 {
754 struct fb_info *info = platform_get_drvdata(pdev);
755
756 unregister_framebuffer(info);
757 __s1d13xxxfb_remove(pdev);
758 return 0;
759 }
760
761 static int s1d13xxxfb_probe(struct platform_device *pdev)
762 {
763 struct s1d13xxxfb_par *default_par;
764 struct fb_info *info;
765 struct s1d13xxxfb_pdata *pdata = NULL;
766 int ret = 0;
767 int i;
768 u8 revision, prod_id;
769
770 dbg("probe called: device is %p\n", pdev);
771
772 printk(KERN_INFO "Epson S1D13XXX FB Driver\n");
773
774 /* enable platform-dependent hardware glue, if any */
775 if (dev_get_platdata(&pdev->dev))
776 pdata = dev_get_platdata(&pdev->dev);
777
778 if (pdata && pdata->platform_init_video)
779 pdata->platform_init_video();
780
781 if (pdev->num_resources != 2) {
782 dev_err(&pdev->dev, "invalid num_resources: %i\n",
783 pdev->num_resources);
784 ret = -ENODEV;
785 goto bail;
786 }
787
788 /* resource[0] is VRAM, resource[1] is registers */
789 if (pdev->resource[0].flags != IORESOURCE_MEM
790 || pdev->resource[1].flags != IORESOURCE_MEM) {
791 dev_err(&pdev->dev, "invalid resource type\n");
792 ret = -ENODEV;
793 goto bail;
794 }
795
796 if (!request_mem_region(pdev->resource[0].start,
797 resource_size(&pdev->resource[0]), "s1d13xxxfb mem")) {
798 dev_dbg(&pdev->dev, "request_mem_region failed\n");
799 ret = -EBUSY;
800 goto bail;
801 }
802
803 if (!request_mem_region(pdev->resource[1].start,
804 resource_size(&pdev->resource[1]), "s1d13xxxfb regs")) {
805 dev_dbg(&pdev->dev, "request_mem_region failed\n");
806 ret = -EBUSY;
807 goto bail;
808 }
809
810 info = framebuffer_alloc(sizeof(struct s1d13xxxfb_par) + sizeof(u32) * 256, &pdev->dev);
811 if (!info) {
812 ret = -ENOMEM;
813 goto bail;
814 }
815
816 platform_set_drvdata(pdev, info);
817 default_par = info->par;
818 default_par->regs = ioremap(pdev->resource[1].start,
819 resource_size(&pdev->resource[1]));
820 if (!default_par->regs) {
821 printk(KERN_ERR PFX "unable to map registers\n");
822 ret = -ENOMEM;
823 goto bail;
824 }
825 info->pseudo_palette = default_par->pseudo_palette;
826
827 info->screen_base = ioremap(pdev->resource[0].start,
828 resource_size(&pdev->resource[0]));
829
830 if (!info->screen_base) {
831 printk(KERN_ERR PFX "unable to map framebuffer\n");
832 ret = -ENOMEM;
833 goto bail;
834 }
835
836 /* production id is top 6 bits */
837 prod_id = s1d13xxxfb_readreg(default_par, S1DREG_REV_CODE) >> 2;
838 /* revision id is lower 2 bits */
839 revision = s1d13xxxfb_readreg(default_par, S1DREG_REV_CODE) & 0x3;
840 ret = -ENODEV;
841
842 for (i = 0; i < ARRAY_SIZE(s1d13xxxfb_prod_ids); i++) {
843 if (prod_id == s1d13xxxfb_prod_ids[i]) {
844 /* looks like we got it in our list */
845 default_par->prod_id = prod_id;
846 default_par->revision = revision;
847 ret = 0;
848 break;
849 }
850 }
851
852 if (!ret) {
853 printk(KERN_INFO PFX "chip production id %i = %s\n",
854 prod_id, s1d13xxxfb_prod_names[i]);
855 printk(KERN_INFO PFX "chip revision %i\n", revision);
856 } else {
857 printk(KERN_INFO PFX
858 "unknown chip production id %i, revision %i\n",
859 prod_id, revision);
860 printk(KERN_INFO PFX "please contact maintainer\n");
861 goto bail;
862 }
863
864 info->fix = s1d13xxxfb_fix;
865 info->fix.mmio_start = pdev->resource[1].start;
866 info->fix.mmio_len = resource_size(&pdev->resource[1]);
867 info->fix.smem_start = pdev->resource[0].start;
868 info->fix.smem_len = resource_size(&pdev->resource[0]);
869
870 printk(KERN_INFO PFX "regs mapped at 0x%p, fb %d KiB mapped at 0x%p\n",
871 default_par->regs, info->fix.smem_len / 1024, info->screen_base);
872
873 info->par = default_par;
874 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
875 info->fbops = &s1d13xxxfb_fbops;
876
877 switch(prod_id) {
878 case S1D13506_PROD_ID: /* activate acceleration */
879 s1d13xxxfb_fbops.fb_fillrect = s1d13xxxfb_bitblt_solidfill;
880 s1d13xxxfb_fbops.fb_copyarea = s1d13xxxfb_bitblt_copyarea;
881 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN |
882 FBINFO_HWACCEL_FILLRECT | FBINFO_HWACCEL_COPYAREA;
883 break;
884 default:
885 break;
886 }
887
888 /* perform "manual" chip initialization, if needed */
889 if (pdata && pdata->initregs)
890 s1d13xxxfb_runinit(info->par, pdata->initregs, pdata->initregssize);
891
892 s1d13xxxfb_fetch_hw_state(info);
893
894 if (register_framebuffer(info) < 0) {
895 ret = -EINVAL;
896 goto bail;
897 }
898
899 fb_info(info, "%s frame buffer device\n", info->fix.id);
900
901 return 0;
902
903 bail:
904 __s1d13xxxfb_remove(pdev);
905 return ret;
906
907 }
908
909 #ifdef CONFIG_PM
910 static int s1d13xxxfb_suspend(struct platform_device *dev, pm_message_t state)
911 {
912 struct fb_info *info = platform_get_drvdata(dev);
913 struct s1d13xxxfb_par *s1dfb = info->par;
914 struct s1d13xxxfb_pdata *pdata = NULL;
915
916 /* disable display */
917 lcd_enable(s1dfb, 0);
918 crt_enable(s1dfb, 0);
919
920 if (dev_get_platdata(&dev->dev))
921 pdata = dev_get_platdata(&dev->dev);
922
923 #if 0
924 if (!s1dfb->disp_save)
925 s1dfb->disp_save = kmalloc(info->fix.smem_len, GFP_KERNEL);
926
927 if (!s1dfb->disp_save) {
928 printk(KERN_ERR PFX "no memory to save screen\n");
929 return -ENOMEM;
930 }
931
932 memcpy_fromio(s1dfb->disp_save, info->screen_base, info->fix.smem_len);
933 #else
934 s1dfb->disp_save = NULL;
935 #endif
936
937 if (!s1dfb->regs_save)
938 s1dfb->regs_save = kmalloc(info->fix.mmio_len, GFP_KERNEL);
939
940 if (!s1dfb->regs_save) {
941 printk(KERN_ERR PFX "no memory to save registers");
942 return -ENOMEM;
943 }
944
945 /* backup all registers */
946 memcpy_fromio(s1dfb->regs_save, s1dfb->regs, info->fix.mmio_len);
947
948 /* now activate power save mode */
949 s1d13xxxfb_writereg(s1dfb, S1DREG_PS_CNF, 0x11);
950
951 if (pdata && pdata->platform_suspend_video)
952 return pdata->platform_suspend_video();
953 else
954 return 0;
955 }
956
957 static int s1d13xxxfb_resume(struct platform_device *dev)
958 {
959 struct fb_info *info = platform_get_drvdata(dev);
960 struct s1d13xxxfb_par *s1dfb = info->par;
961 struct s1d13xxxfb_pdata *pdata = NULL;
962
963 /* awaken the chip */
964 s1d13xxxfb_writereg(s1dfb, S1DREG_PS_CNF, 0x10);
965
966 /* do not let go until SDRAM "wakes up" */
967 while ((s1d13xxxfb_readreg(s1dfb, S1DREG_PS_STATUS) & 0x01))
968 udelay(10);
969
970 if (dev_get_platdata(&dev->dev))
971 pdata = dev_get_platdata(&dev->dev);
972
973 if (s1dfb->regs_save) {
974 /* will write RO regs, *should* get away with it :) */
975 memcpy_toio(s1dfb->regs, s1dfb->regs_save, info->fix.mmio_len);
976 kfree(s1dfb->regs_save);
977 }
978
979 if (s1dfb->disp_save) {
980 memcpy_toio(info->screen_base, s1dfb->disp_save,
981 info->fix.smem_len);
982 kfree(s1dfb->disp_save); /* XXX kmalloc()'d when? */
983 }
984
985 if ((s1dfb->display & 0x01) != 0)
986 lcd_enable(s1dfb, 1);
987 if ((s1dfb->display & 0x02) != 0)
988 crt_enable(s1dfb, 1);
989
990 if (pdata && pdata->platform_resume_video)
991 return pdata->platform_resume_video();
992 else
993 return 0;
994 }
995 #endif /* CONFIG_PM */
996
997 static struct platform_driver s1d13xxxfb_driver = {
998 .probe = s1d13xxxfb_probe,
999 .remove = s1d13xxxfb_remove,
1000 #ifdef CONFIG_PM
1001 .suspend = s1d13xxxfb_suspend,
1002 .resume = s1d13xxxfb_resume,
1003 #endif
1004 .driver = {
1005 .name = S1D_DEVICENAME,
1006 },
1007 };
1008
1009
1010 static int __init
1011 s1d13xxxfb_init(void)
1012 {
1013
1014 #ifndef MODULE
1015 if (fb_get_options("s1d13xxxfb", NULL))
1016 return -ENODEV;
1017 #endif
1018
1019 return platform_driver_register(&s1d13xxxfb_driver);
1020 }
1021
1022
1023 static void __exit
1024 s1d13xxxfb_exit(void)
1025 {
1026 platform_driver_unregister(&s1d13xxxfb_driver);
1027 }
1028
1029 module_init(s1d13xxxfb_init);
1030 module_exit(s1d13xxxfb_exit);
1031
1032
1033 MODULE_LICENSE("GPL");
1034 MODULE_DESCRIPTION("Framebuffer driver for S1D13xxx devices");
1035 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>, Thibaut VARENE <varenet@parisc-linux.org>");
Linux with added FPC-III support