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fbdev: add mutex for fb_mmap locking
[linux-2.6/mini2440.git] / drivers / video / matrox / matroxfb_crtc2.c
blob909e10a11898b4c54a83b04eb56aa9171b9a90d3
1 /*
2 *
3 * Hardware accelerated Matrox Millennium I, II, Mystique, G100, G200, G400 and G450.
4 *
5 * (c) 1998-2002 Petr Vandrovec <vandrove@vc.cvut.cz>
6 *
7 * Portions Copyright (c) 2001 Matrox Graphics Inc.
8 *
9 * Version: 1.65 2002/08/14
10 *
11 */
12
13 #include "matroxfb_maven.h"
14 #include "matroxfb_crtc2.h"
15 #include "matroxfb_misc.h"
16 #include "matroxfb_DAC1064.h"
17 #include <linux/matroxfb.h>
18 #include <linux/uaccess.h>
19
20 /* **************************************************** */
21
22 static int mem = 8192;
23
24 module_param(mem, int, 0);
25 MODULE_PARM_DESC(mem, "Memory size reserved for dualhead (default=8MB)");
26
27 /* **************************************************** */
28
29 static int matroxfb_dh_setcolreg(unsigned regno, unsigned red, unsigned green,
30 unsigned blue, unsigned transp, struct fb_info* info) {
31 u_int32_t col;
32 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
33
34 if (regno >= 16)
35 return 1;
36 if (m2info->fbcon.var.grayscale) {
37 /* gray = 0.30*R + 0.59*G + 0.11*B */
38 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
39 }
40 red = CNVT_TOHW(red, m2info->fbcon.var.red.length);
41 green = CNVT_TOHW(green, m2info->fbcon.var.green.length);
42 blue = CNVT_TOHW(blue, m2info->fbcon.var.blue.length);
43 transp = CNVT_TOHW(transp, m2info->fbcon.var.transp.length);
44
45 col = (red << m2info->fbcon.var.red.offset) |
46 (green << m2info->fbcon.var.green.offset) |
47 (blue << m2info->fbcon.var.blue.offset) |
48 (transp << m2info->fbcon.var.transp.offset);
49
50 switch (m2info->fbcon.var.bits_per_pixel) {
51 case 16:
52 m2info->cmap[regno] = col | (col << 16);
53 break;
54 case 32:
55 m2info->cmap[regno] = col;
56 break;
57 }
58 return 0;
59 #undef m2info
60 }
61
62 static void matroxfb_dh_restore(struct matroxfb_dh_fb_info* m2info,
63 struct my_timming* mt,
64 int mode,
65 unsigned int pos) {
66 u_int32_t tmp;
67 u_int32_t datactl;
68 MINFO_FROM(m2info->primary_dev);
69
70 switch (mode) {
71 case 15:
72 tmp = 0x00200000;
73 break;
74 case 16:
75 tmp = 0x00400000;
76 break;
77 /* case 32: */
78 default:
79 tmp = 0x00800000;
80 break;
81 }
82 tmp |= 0x00000001; /* enable CRTC2 */
83 datactl = 0;
84 if (ACCESS_FBINFO(outputs[1]).src == MATROXFB_SRC_CRTC2) {
85 if (ACCESS_FBINFO(devflags.g450dac)) {
86 tmp |= 0x00000006; /* source from secondary pixel PLL */
87 /* no vidrst when in monitor mode */
88 if (ACCESS_FBINFO(outputs[1]).mode != MATROXFB_OUTPUT_MODE_MONITOR) {
89 tmp |= 0xC0001000; /* Enable H/V vidrst */
90 }
91 } else {
92 tmp |= 0x00000002; /* source from VDOCLK */
93 tmp |= 0xC0000000; /* enable vvidrst & hvidrst */
94 /* MGA TVO is our clock source */
95 }
96 } else if (ACCESS_FBINFO(outputs[0]).src == MATROXFB_SRC_CRTC2) {
97 tmp |= 0x00000004; /* source from pixclock */
98 /* PIXPLL is our clock source */
99 }
100 if (ACCESS_FBINFO(outputs[0]).src == MATROXFB_SRC_CRTC2) {
101 tmp |= 0x00100000; /* connect CRTC2 to DAC */
102 }
103 if (mt->interlaced) {
104 tmp |= 0x02000000; /* interlaced, second field is bigger, as G450 apparently ignores it */
105 mt->VDisplay >>= 1;
106 mt->VSyncStart >>= 1;
107 mt->VSyncEnd >>= 1;
108 mt->VTotal >>= 1;
109 }
110 if ((mt->HTotal & 7) == 2) {
111 datactl |= 0x00000010;
112 mt->HTotal &= ~7;
113 }
114 tmp |= 0x10000000; /* 0x10000000 is VIDRST polarity */
115 mga_outl(0x3C14, ((mt->HDisplay - 8) << 16) | (mt->HTotal - 8));
116 mga_outl(0x3C18, ((mt->HSyncEnd - 8) << 16) | (mt->HSyncStart - 8));
117 mga_outl(0x3C1C, ((mt->VDisplay - 1) << 16) | (mt->VTotal - 1));
118 mga_outl(0x3C20, ((mt->VSyncEnd - 1) << 16) | (mt->VSyncStart - 1));
119 mga_outl(0x3C24, ((mt->VSyncStart) << 16) | (mt->HSyncStart)); /* preload */
120 {
121 u_int32_t linelen = m2info->fbcon.var.xres_virtual * (m2info->fbcon.var.bits_per_pixel >> 3);
122 if (tmp & 0x02000000) {
123 /* field #0 is smaller, so... */
124 mga_outl(0x3C2C, pos); /* field #1 vmemory start */
125 mga_outl(0x3C28, pos + linelen); /* field #0 vmemory start */
126 linelen <<= 1;
127 m2info->interlaced = 1;
128 } else {
129 mga_outl(0x3C28, pos); /* vmemory start */
130 m2info->interlaced = 0;
131 }
132 mga_outl(0x3C40, linelen);
133 }
134 mga_outl(0x3C4C, datactl); /* data control */
135 if (tmp & 0x02000000) {
136 int i;
137
138 mga_outl(0x3C10, tmp & ~0x02000000);
139 for (i = 0; i < 2; i++) {
140 unsigned int nl;
141 unsigned int lastl = 0;
142
143 while ((nl = mga_inl(0x3C48) & 0xFFF) >= lastl) {
144 lastl = nl;
145 }
146 }
147 }
148 mga_outl(0x3C10, tmp);
149 ACCESS_FBINFO(hw).crtc2.ctl = tmp;
150
151 tmp = mt->VDisplay << 16; /* line compare */
152 if (mt->sync & FB_SYNC_HOR_HIGH_ACT)
153 tmp |= 0x00000100;
154 if (mt->sync & FB_SYNC_VERT_HIGH_ACT)
155 tmp |= 0x00000200;
156 mga_outl(0x3C44, tmp);
157 }
158
159 static void matroxfb_dh_disable(struct matroxfb_dh_fb_info* m2info) {
160 MINFO_FROM(m2info->primary_dev);
161
162 mga_outl(0x3C10, 0x00000004); /* disable CRTC2, CRTC1->DAC1, PLL as clock source */
163 ACCESS_FBINFO(hw).crtc2.ctl = 0x00000004;
164 }
165
166 static void matroxfb_dh_pan_var(struct matroxfb_dh_fb_info* m2info,
167 struct fb_var_screeninfo* var) {
168 unsigned int pos;
169 unsigned int linelen;
170 unsigned int pixelsize;
171 MINFO_FROM(m2info->primary_dev);
172
173 m2info->fbcon.var.xoffset = var->xoffset;
174 m2info->fbcon.var.yoffset = var->yoffset;
175 pixelsize = m2info->fbcon.var.bits_per_pixel >> 3;
176 linelen = m2info->fbcon.var.xres_virtual * pixelsize;
177 pos = m2info->fbcon.var.yoffset * linelen + m2info->fbcon.var.xoffset * pixelsize;
178 pos += m2info->video.offbase;
179 if (m2info->interlaced) {
180 mga_outl(0x3C2C, pos);
181 mga_outl(0x3C28, pos + linelen);
182 } else {
183 mga_outl(0x3C28, pos);
184 }
185 }
186
187 static int matroxfb_dh_decode_var(struct matroxfb_dh_fb_info* m2info,
188 struct fb_var_screeninfo* var,
189 int *visual,
190 int *video_cmap_len,
191 int *mode) {
192 unsigned int mask;
193 unsigned int memlen;
194 unsigned int vramlen;
195
196 switch (var->bits_per_pixel) {
197 case 16: mask = 0x1F;
198 break;
199 case 32: mask = 0x0F;
200 break;
201 default: return -EINVAL;
202 }
203 vramlen = m2info->video.len_usable;
204 if (var->yres_virtual < var->yres)
205 var->yres_virtual = var->yres;
206 if (var->xres_virtual < var->xres)
207 var->xres_virtual = var->xres;
208 var->xres_virtual = (var->xres_virtual + mask) & ~mask;
209 if (var->yres_virtual > 32767)
210 return -EINVAL;
211 memlen = var->xres_virtual * var->yres_virtual * (var->bits_per_pixel >> 3);
212 if (memlen > vramlen)
213 return -EINVAL;
214 if (var->xoffset + var->xres > var->xres_virtual)
215 var->xoffset = var->xres_virtual - var->xres;
216 if (var->yoffset + var->yres > var->yres_virtual)
217 var->yoffset = var->yres_virtual - var->yres;
218
219 var->xres &= ~7;
220 var->left_margin &= ~7;
221 var->right_margin &= ~7;
222 var->hsync_len &= ~7;
223
224 *mode = var->bits_per_pixel;
225 if (var->bits_per_pixel == 16) {
226 if (var->green.length == 5) {
227 var->red.offset = 10;
228 var->red.length = 5;
229 var->green.offset = 5;
230 var->green.length = 5;
231 var->blue.offset = 0;
232 var->blue.length = 5;
233 var->transp.offset = 15;
234 var->transp.length = 1;
235 *mode = 15;
236 } else {
237 var->red.offset = 11;
238 var->red.length = 5;
239 var->green.offset = 5;
240 var->green.length = 6;
241 var->blue.offset = 0;
242 var->blue.length = 5;
243 var->transp.offset = 0;
244 var->transp.length = 0;
245 }
246 } else {
247 var->red.offset = 16;
248 var->red.length = 8;
249 var->green.offset = 8;
250 var->green.length = 8;
251 var->blue.offset = 0;
252 var->blue.length = 8;
253 var->transp.offset = 24;
254 var->transp.length = 8;
255 }
256 *visual = FB_VISUAL_TRUECOLOR;
257 *video_cmap_len = 16;
258 return 0;
259 }
260
261 static int matroxfb_dh_open(struct fb_info* info, int user) {
262 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
263 MINFO_FROM(m2info->primary_dev);
264
265 if (MINFO) {
266 int err;
267
268 if (ACCESS_FBINFO(dead)) {
269 return -ENXIO;
270 }
271 err = ACCESS_FBINFO(fbops).fb_open(&ACCESS_FBINFO(fbcon), user);
272 if (err) {
273 return err;
274 }
275 }
276 return 0;
277 #undef m2info
278 }
279
280 static int matroxfb_dh_release(struct fb_info* info, int user) {
281 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
282 int err = 0;
283 MINFO_FROM(m2info->primary_dev);
284
285 if (MINFO) {
286 err = ACCESS_FBINFO(fbops).fb_release(&ACCESS_FBINFO(fbcon), user);
287 }
288 return err;
289 #undef m2info
290 }
291
292 static void matroxfb_dh_init_fix(struct matroxfb_dh_fb_info *m2info)
293 {
294 struct fb_fix_screeninfo *fix = &m2info->fbcon.fix;
295
296 strcpy(fix->id, "MATROX DH");
297
298 mutex_lock(&m2info->fbcon.mm_lock);
299 fix->smem_start = m2info->video.base;
300 fix->smem_len = m2info->video.len_usable;
301 mutex_unlock(&m2info->fbcon.mm_lock);
302 fix->ypanstep = 1;
303 fix->ywrapstep = 0;
304 fix->xpanstep = 8; /* TBD */
305 fix->mmio_start = m2info->mmio.base;
306 fix->mmio_len = m2info->mmio.len;
307 fix->accel = 0; /* no accel... */
308 }
309
310 static int matroxfb_dh_check_var(struct fb_var_screeninfo* var, struct fb_info* info) {
311 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
312 int visual;
313 int cmap_len;
314 int mode;
315
316 return matroxfb_dh_decode_var(m2info, var, &visual, &cmap_len, &mode);
317 #undef m2info
318 }
319
320 static int matroxfb_dh_set_par(struct fb_info* info) {
321 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
322 int visual;
323 int cmap_len;
324 int mode;
325 int err;
326 struct fb_var_screeninfo* var = &info->var;
327 MINFO_FROM(m2info->primary_dev);
328
329 if ((err = matroxfb_dh_decode_var(m2info, var, &visual, &cmap_len, &mode)) != 0)
330 return err;
331 /* cmap */
332 {
333 m2info->fbcon.screen_base = vaddr_va(m2info->video.vbase);
334 m2info->fbcon.fix.visual = visual;
335 m2info->fbcon.fix.type = FB_TYPE_PACKED_PIXELS;
336 m2info->fbcon.fix.type_aux = 0;
337 m2info->fbcon.fix.line_length = (var->xres_virtual * var->bits_per_pixel) >> 3;
338 }
339 {
340 struct my_timming mt;
341 unsigned int pos;
342 int out;
343 int cnt;
344
345 matroxfb_var2my(&m2info->fbcon.var, &mt);
346 mt.crtc = MATROXFB_SRC_CRTC2;
347 /* CRTC2 delay */
348 mt.delay = 34;
349
350 pos = (m2info->fbcon.var.yoffset * m2info->fbcon.var.xres_virtual + m2info->fbcon.var.xoffset) * m2info->fbcon.var.bits_per_pixel >> 3;
351 pos += m2info->video.offbase;
352 cnt = 0;
353 down_read(&ACCESS_FBINFO(altout).lock);
354 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
355 if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2) {
356 cnt++;
357 if (ACCESS_FBINFO(outputs[out]).output->compute) {
358 ACCESS_FBINFO(outputs[out]).output->compute(ACCESS_FBINFO(outputs[out]).data, &mt);
359 }
360 }
361 }
362 ACCESS_FBINFO(crtc2).pixclock = mt.pixclock;
363 ACCESS_FBINFO(crtc2).mnp = mt.mnp;
364 up_read(&ACCESS_FBINFO(altout).lock);
365 if (cnt) {
366 matroxfb_dh_restore(m2info, &mt, mode, pos);
367 } else {
368 matroxfb_dh_disable(m2info);
369 }
370 DAC1064_global_init(PMINFO2);
371 DAC1064_global_restore(PMINFO2);
372 down_read(&ACCESS_FBINFO(altout).lock);
373 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
374 if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2 &&
375 ACCESS_FBINFO(outputs[out]).output->program) {
376 ACCESS_FBINFO(outputs[out]).output->program(ACCESS_FBINFO(outputs[out]).data);
377 }
378 }
379 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
380 if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2 &&
381 ACCESS_FBINFO(outputs[out]).output->start) {
382 ACCESS_FBINFO(outputs[out]).output->start(ACCESS_FBINFO(outputs[out]).data);
383 }
384 }
385 up_read(&ACCESS_FBINFO(altout).lock);
386 }
387 m2info->initialized = 1;
388 return 0;
389 #undef m2info
390 }
391
392 static int matroxfb_dh_pan_display(struct fb_var_screeninfo* var, struct fb_info* info) {
393 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
394 matroxfb_dh_pan_var(m2info, var);
395 return 0;
396 #undef m2info
397 }
398
399 static int matroxfb_dh_get_vblank(const struct matroxfb_dh_fb_info* m2info, struct fb_vblank* vblank) {
400 MINFO_FROM(m2info->primary_dev);
401
402 matroxfb_enable_irq(PMINFO 0);
403 memset(vblank, 0, sizeof(*vblank));
404 vblank->flags = FB_VBLANK_HAVE_VCOUNT | FB_VBLANK_HAVE_VBLANK;
405 /* mask out reserved bits + field number (odd/even) */
406 vblank->vcount = mga_inl(0x3C48) & 0x000007FF;
407 /* compatibility stuff */
408 if (vblank->vcount >= m2info->fbcon.var.yres)
409 vblank->flags |= FB_VBLANK_VBLANKING;
410 if (test_bit(0, &ACCESS_FBINFO(irq_flags))) {
411 vblank->flags |= FB_VBLANK_HAVE_COUNT;
412 /* Only one writer, aligned int value...
413 it should work without lock and without atomic_t */
414 vblank->count = ACCESS_FBINFO(crtc2).vsync.cnt;
415 }
416 return 0;
417 }
418
419 static int matroxfb_dh_ioctl(struct fb_info *info,
420 unsigned int cmd,
421 unsigned long arg)
422 {
423 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
424 MINFO_FROM(m2info->primary_dev);
425
426 DBG(__func__)
427
428 switch (cmd) {
429 case FBIOGET_VBLANK:
430 {
431 struct fb_vblank vblank;
432 int err;
433
434 err = matroxfb_dh_get_vblank(m2info, &vblank);
435 if (err)
436 return err;
437 if (copy_to_user((void __user *)arg, &vblank, sizeof(vblank)))
438 return -EFAULT;
439 return 0;
440 }
441 case FBIO_WAITFORVSYNC:
442 {
443 u_int32_t crt;
444
445 if (get_user(crt, (u_int32_t __user *)arg))
446 return -EFAULT;
447
448 if (crt != 0)
449 return -ENODEV;
450 return matroxfb_wait_for_sync(PMINFO 1);
451 }
452 case MATROXFB_SET_OUTPUT_MODE:
453 case MATROXFB_GET_OUTPUT_MODE:
454 case MATROXFB_GET_ALL_OUTPUTS:
455 {
456 return ACCESS_FBINFO(fbcon.fbops)->fb_ioctl(&ACCESS_FBINFO(fbcon), cmd, arg);
457 }
458 case MATROXFB_SET_OUTPUT_CONNECTION:
459 {
460 u_int32_t tmp;
461 int out;
462 int changes;
463
464 if (get_user(tmp, (u_int32_t __user *)arg))
465 return -EFAULT;
466 for (out = 0; out < 32; out++) {
467 if (tmp & (1 << out)) {
468 if (out >= MATROXFB_MAX_OUTPUTS)
469 return -ENXIO;
470 if (!ACCESS_FBINFO(outputs[out]).output)
471 return -ENXIO;
472 switch (ACCESS_FBINFO(outputs[out]).src) {
473 case MATROXFB_SRC_NONE:
474 case MATROXFB_SRC_CRTC2:
475 break;
476 default:
477 return -EBUSY;
478 }
479 }
480 }
481 if (ACCESS_FBINFO(devflags.panellink)) {
482 if (tmp & MATROXFB_OUTPUT_CONN_DFP)
483 return -EINVAL;
484 if ((ACCESS_FBINFO(outputs[2]).src == MATROXFB_SRC_CRTC1) && tmp)
485 return -EBUSY;
486 }
487 changes = 0;
488 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
489 if (tmp & (1 << out)) {
490 if (ACCESS_FBINFO(outputs[out]).src != MATROXFB_SRC_CRTC2) {
491 changes = 1;
492 ACCESS_FBINFO(outputs[out]).src = MATROXFB_SRC_CRTC2;
493 }
494 } else if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2) {
495 changes = 1;
496 ACCESS_FBINFO(outputs[out]).src = MATROXFB_SRC_NONE;
497 }
498 }
499 if (!changes)
500 return 0;
501 matroxfb_dh_set_par(info);
502 return 0;
503 }
504 case MATROXFB_GET_OUTPUT_CONNECTION:
505 {
506 u_int32_t conn = 0;
507 int out;
508
509 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
510 if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2) {
511 conn |= 1 << out;
512 }
513 }
514 if (put_user(conn, (u_int32_t __user *)arg))
515 return -EFAULT;
516 return 0;
517 }
518 case MATROXFB_GET_AVAILABLE_OUTPUTS:
519 {
520 u_int32_t tmp = 0;
521 int out;
522
523 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
524 if (ACCESS_FBINFO(outputs[out]).output) {
525 switch (ACCESS_FBINFO(outputs[out]).src) {
526 case MATROXFB_SRC_NONE:
527 case MATROXFB_SRC_CRTC2:
528 tmp |= 1 << out;
529 break;
530 }
531 }
532 }
533 if (ACCESS_FBINFO(devflags.panellink)) {
534 tmp &= ~MATROXFB_OUTPUT_CONN_DFP;
535 if (ACCESS_FBINFO(outputs[2]).src == MATROXFB_SRC_CRTC1) {
536 tmp = 0;
537 }
538 }
539 if (put_user(tmp, (u_int32_t __user *)arg))
540 return -EFAULT;
541 return 0;
542 }
543 }
544 return -ENOTTY;
545 #undef m2info
546 }
547
548 static int matroxfb_dh_blank(int blank, struct fb_info* info) {
549 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
550 switch (blank) {
551 case 1:
552 case 2:
553 case 3:
554 case 4:
555 default:;
556 }
557 /* do something... */
558 return 0;
559 #undef m2info
560 }
561
562 static struct fb_ops matroxfb_dh_ops = {
563 .owner = THIS_MODULE,
564 .fb_open = matroxfb_dh_open,
565 .fb_release = matroxfb_dh_release,
566 .fb_check_var = matroxfb_dh_check_var,
567 .fb_set_par = matroxfb_dh_set_par,
568 .fb_setcolreg = matroxfb_dh_setcolreg,
569 .fb_pan_display =matroxfb_dh_pan_display,
570 .fb_blank = matroxfb_dh_blank,
571 .fb_ioctl = matroxfb_dh_ioctl,
572 .fb_fillrect = cfb_fillrect,
573 .fb_copyarea = cfb_copyarea,
574 .fb_imageblit = cfb_imageblit,
575 };
576
577 static struct fb_var_screeninfo matroxfb_dh_defined = {
578 640,480,640,480,/* W,H, virtual W,H */
579 0,0, /* offset */
580 32, /* depth */
581 0, /* gray */
582 {0,0,0}, /* R */
583 {0,0,0}, /* G */
584 {0,0,0}, /* B */
585 {0,0,0}, /* alpha */
586 0, /* nonstd */
587 FB_ACTIVATE_NOW,
588 -1,-1, /* display size */
589 0, /* accel flags */
590 39721L,48L,16L,33L,10L,
591 96L,2,0, /* no sync info */
592 FB_VMODE_NONINTERLACED,
593 0, {0,0,0,0,0}
594 };
595
596 static int matroxfb_dh_regit(CPMINFO struct matroxfb_dh_fb_info* m2info) {
597 #define minfo (m2info->primary_dev)
598 void* oldcrtc2;
599
600 m2info->fbcon.fbops = &matroxfb_dh_ops;
601 m2info->fbcon.flags = FBINFO_FLAG_DEFAULT;
602 m2info->fbcon.flags |= FBINFO_HWACCEL_XPAN |
603 FBINFO_HWACCEL_YPAN;
604 m2info->fbcon.pseudo_palette = m2info->cmap;
605 fb_alloc_cmap(&m2info->fbcon.cmap, 256, 1);
606
607 if (mem < 64)
608 mem *= 1024;
609 if (mem < 64*1024)
610 mem *= 1024;
611 mem &= ~0x00000FFF; /* PAGE_MASK? */
612 if (ACCESS_FBINFO(video.len_usable) + mem <= ACCESS_FBINFO(video.len))
613 m2info->video.offbase = ACCESS_FBINFO(video.len) - mem;
614 else if (ACCESS_FBINFO(video.len) < mem) {
615 return -ENOMEM;
616 } else { /* check yres on first head... */
617 m2info->video.borrowed = mem;
618 ACCESS_FBINFO(video.len_usable) -= mem;
619 m2info->video.offbase = ACCESS_FBINFO(video.len_usable);
620 }
621 m2info->video.base = ACCESS_FBINFO(video.base) + m2info->video.offbase;
622 m2info->video.len = m2info->video.len_usable = m2info->video.len_maximum = mem;
623 m2info->video.vbase.vaddr = vaddr_va(ACCESS_FBINFO(video.vbase)) + m2info->video.offbase;
624 m2info->mmio.base = ACCESS_FBINFO(mmio.base);
625 m2info->mmio.vbase = ACCESS_FBINFO(mmio.vbase);
626 m2info->mmio.len = ACCESS_FBINFO(mmio.len);
627
628 matroxfb_dh_init_fix(m2info);
629 if (register_framebuffer(&m2info->fbcon)) {
630 return -ENXIO;
631 }
632 if (!m2info->initialized)
633 fb_set_var(&m2info->fbcon, &matroxfb_dh_defined);
634 down_write(&ACCESS_FBINFO(crtc2.lock));
635 oldcrtc2 = ACCESS_FBINFO(crtc2.info);
636 ACCESS_FBINFO(crtc2.info) = m2info;
637 up_write(&ACCESS_FBINFO(crtc2.lock));
638 if (oldcrtc2) {
639 printk(KERN_ERR "matroxfb_crtc2: Internal consistency check failed: crtc2 already present: %p\n",
640 oldcrtc2);
641 }
642 return 0;
643 #undef minfo
644 }
645
646 /* ************************** */
647
648 static int matroxfb_dh_registerfb(struct matroxfb_dh_fb_info* m2info) {
649 #define minfo (m2info->primary_dev)
650 if (matroxfb_dh_regit(PMINFO m2info)) {
651 printk(KERN_ERR "matroxfb_crtc2: secondary head failed to register\n");
652 return -1;
653 }
654 printk(KERN_INFO "matroxfb_crtc2: secondary head of fb%u was registered as fb%u\n",
655 ACCESS_FBINFO(fbcon.node), m2info->fbcon.node);
656 m2info->fbcon_registered = 1;
657 return 0;
658 #undef minfo
659 }
660
661 static void matroxfb_dh_deregisterfb(struct matroxfb_dh_fb_info* m2info) {
662 #define minfo (m2info->primary_dev)
663 if (m2info->fbcon_registered) {
664 int id;
665 struct matroxfb_dh_fb_info* crtc2;
666
667 down_write(&ACCESS_FBINFO(crtc2.lock));
668 crtc2 = ACCESS_FBINFO(crtc2.info);
669 if (crtc2 == m2info)
670 ACCESS_FBINFO(crtc2.info) = NULL;
671 up_write(&ACCESS_FBINFO(crtc2.lock));
672 if (crtc2 != m2info) {
673 printk(KERN_ERR "matroxfb_crtc2: Internal consistency check failed: crtc2 mismatch at unload: %p != %p\n",
674 crtc2, m2info);
675 printk(KERN_ERR "matroxfb_crtc2: Expect kernel crash after module unload.\n");
676 return;
677 }
678 id = m2info->fbcon.node;
679 unregister_framebuffer(&m2info->fbcon);
680 /* return memory back to primary head */
681 ACCESS_FBINFO(video.len_usable) += m2info->video.borrowed;
682 printk(KERN_INFO "matroxfb_crtc2: fb%u unregistered\n", id);
683 m2info->fbcon_registered = 0;
684 }
685 #undef minfo
686 }
687
688 static void* matroxfb_crtc2_probe(struct matrox_fb_info* minfo) {
689 struct matroxfb_dh_fb_info* m2info;
690
691 /* hardware is CRTC2 incapable... */
692 if (!ACCESS_FBINFO(devflags.crtc2))
693 return NULL;
694 m2info = kzalloc(sizeof(*m2info), GFP_KERNEL);
695 if (!m2info) {
696 printk(KERN_ERR "matroxfb_crtc2: Not enough memory for CRTC2 control structs\n");
697 return NULL;
698 }
699 m2info->primary_dev = MINFO;
700 if (matroxfb_dh_registerfb(m2info)) {
701 kfree(m2info);
702 printk(KERN_ERR "matroxfb_crtc2: CRTC2 framebuffer failed to register\n");
703 return NULL;
704 }
705 return m2info;
706 }
707
708 static void matroxfb_crtc2_remove(struct matrox_fb_info* minfo, void* crtc2) {
709 matroxfb_dh_deregisterfb(crtc2);
710 kfree(crtc2);
711 }
712
713 static struct matroxfb_driver crtc2 = {
714 .name = "Matrox G400 CRTC2",
715 .probe = matroxfb_crtc2_probe,
716 .remove = matroxfb_crtc2_remove };
717
718 static int matroxfb_crtc2_init(void) {
719 if (fb_get_options("matrox_crtc2fb", NULL))
720 return -ENODEV;
721
722 matroxfb_register_driver(&crtc2);
723 return 0;
724 }
725
726 static void matroxfb_crtc2_exit(void) {
727 matroxfb_unregister_driver(&crtc2);
728 }
729
730 MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>");
731 MODULE_DESCRIPTION("Matrox G400 CRTC2 driver");
732 MODULE_LICENSE("GPL");
733 module_init(matroxfb_crtc2_init);
734 module_exit(matroxfb_crtc2_exit);
735 /* we do not have __setup() yet */
Support for the Chinese Samsung S3C2440 based development boards