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Linux 2.6.34-rc3
[pohmelfs.git] / drivers / video / matrox / matroxfb_crtc2.c
blob78414baa5a54f185da5d43f2b9deaa7c70e66e0d
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 struct matrox_fb_info *minfo = 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 (minfo->outputs[1].src == MATROXFB_SRC_CRTC2) {
85 if (minfo->devflags.g450dac) {
86 tmp |= 0x00000006; /* source from secondary pixel PLL */
87 /* no vidrst when in monitor mode */
88 if (minfo->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 (minfo->outputs[0].src == MATROXFB_SRC_CRTC2) {
97 tmp |= 0x00000004; /* source from pixclock */
98 /* PIXPLL is our clock source */
99 }
100 if (minfo->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 minfo->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 struct matrox_fb_info *minfo = m2info->primary_dev;
161
162 mga_outl(0x3C10, 0x00000004); /* disable CRTC2, CRTC1->DAC1, PLL as clock source */
163 minfo->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 struct matrox_fb_info *minfo = 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 struct matrox_fb_info *minfo = m2info->primary_dev;
264
265 if (minfo) {
266 int err;
267
268 if (minfo->dead) {
269 return -ENXIO;
270 }
271 err = minfo->fbops.fb_open(&minfo->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 struct matrox_fb_info *minfo = m2info->primary_dev;
284
285 if (minfo) {
286 err = minfo->fbops.fb_release(&minfo->fbcon, user);
287 }
288 return err;
289 #undef m2info
290 }
291
292 /*
293 * This function is called before the register_framebuffer so
294 * no locking is needed.
295 */
296 static void matroxfb_dh_init_fix(struct matroxfb_dh_fb_info *m2info)
297 {
298 struct fb_fix_screeninfo *fix = &m2info->fbcon.fix;
299
300 strcpy(fix->id, "MATROX DH");
301
302 fix->smem_start = m2info->video.base;
303 fix->smem_len = m2info->video.len_usable;
304 fix->ypanstep = 1;
305 fix->ywrapstep = 0;
306 fix->xpanstep = 8; /* TBD */
307 fix->mmio_start = m2info->mmio.base;
308 fix->mmio_len = m2info->mmio.len;
309 fix->accel = 0; /* no accel... */
310 }
311
312 static int matroxfb_dh_check_var(struct fb_var_screeninfo* var, struct fb_info* info) {
313 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
314 int visual;
315 int cmap_len;
316 int mode;
317
318 return matroxfb_dh_decode_var(m2info, var, &visual, &cmap_len, &mode);
319 #undef m2info
320 }
321
322 static int matroxfb_dh_set_par(struct fb_info* info) {
323 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
324 int visual;
325 int cmap_len;
326 int mode;
327 int err;
328 struct fb_var_screeninfo* var = &info->var;
329 struct matrox_fb_info *minfo = m2info->primary_dev;
330
331 if ((err = matroxfb_dh_decode_var(m2info, var, &visual, &cmap_len, &mode)) != 0)
332 return err;
333 /* cmap */
334 {
335 m2info->fbcon.screen_base = vaddr_va(m2info->video.vbase);
336 m2info->fbcon.fix.visual = visual;
337 m2info->fbcon.fix.type = FB_TYPE_PACKED_PIXELS;
338 m2info->fbcon.fix.type_aux = 0;
339 m2info->fbcon.fix.line_length = (var->xres_virtual * var->bits_per_pixel) >> 3;
340 }
341 {
342 struct my_timming mt;
343 unsigned int pos;
344 int out;
345 int cnt;
346
347 matroxfb_var2my(&m2info->fbcon.var, &mt);
348 mt.crtc = MATROXFB_SRC_CRTC2;
349 /* CRTC2 delay */
350 mt.delay = 34;
351
352 pos = (m2info->fbcon.var.yoffset * m2info->fbcon.var.xres_virtual + m2info->fbcon.var.xoffset) * m2info->fbcon.var.bits_per_pixel >> 3;
353 pos += m2info->video.offbase;
354 cnt = 0;
355 down_read(&minfo->altout.lock);
356 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
357 if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2) {
358 cnt++;
359 if (minfo->outputs[out].output->compute) {
360 minfo->outputs[out].output->compute(minfo->outputs[out].data, &mt);
361 }
362 }
363 }
364 minfo->crtc2.pixclock = mt.pixclock;
365 minfo->crtc2.mnp = mt.mnp;
366 up_read(&minfo->altout.lock);
367 if (cnt) {
368 matroxfb_dh_restore(m2info, &mt, mode, pos);
369 } else {
370 matroxfb_dh_disable(m2info);
371 }
372 DAC1064_global_init(minfo);
373 DAC1064_global_restore(minfo);
374 down_read(&minfo->altout.lock);
375 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
376 if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2 &&
377 minfo->outputs[out].output->program) {
378 minfo->outputs[out].output->program(minfo->outputs[out].data);
379 }
380 }
381 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
382 if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2 &&
383 minfo->outputs[out].output->start) {
384 minfo->outputs[out].output->start(minfo->outputs[out].data);
385 }
386 }
387 up_read(&minfo->altout.lock);
388 }
389 m2info->initialized = 1;
390 return 0;
391 #undef m2info
392 }
393
394 static int matroxfb_dh_pan_display(struct fb_var_screeninfo* var, struct fb_info* info) {
395 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
396 matroxfb_dh_pan_var(m2info, var);
397 return 0;
398 #undef m2info
399 }
400
401 static int matroxfb_dh_get_vblank(const struct matroxfb_dh_fb_info* m2info, struct fb_vblank* vblank) {
402 struct matrox_fb_info *minfo = m2info->primary_dev;
403
404 matroxfb_enable_irq(minfo, 0);
405 memset(vblank, 0, sizeof(*vblank));
406 vblank->flags = FB_VBLANK_HAVE_VCOUNT | FB_VBLANK_HAVE_VBLANK;
407 /* mask out reserved bits + field number (odd/even) */
408 vblank->vcount = mga_inl(0x3C48) & 0x000007FF;
409 /* compatibility stuff */
410 if (vblank->vcount >= m2info->fbcon.var.yres)
411 vblank->flags |= FB_VBLANK_VBLANKING;
412 if (test_bit(0, &minfo->irq_flags)) {
413 vblank->flags |= FB_VBLANK_HAVE_COUNT;
414 /* Only one writer, aligned int value...
415 it should work without lock and without atomic_t */
416 vblank->count = minfo->crtc2.vsync.cnt;
417 }
418 return 0;
419 }
420
421 static int matroxfb_dh_ioctl(struct fb_info *info,
422 unsigned int cmd,
423 unsigned long arg)
424 {
425 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
426 struct matrox_fb_info *minfo = m2info->primary_dev;
427
428 DBG(__func__)
429
430 switch (cmd) {
431 case FBIOGET_VBLANK:
432 {
433 struct fb_vblank vblank;
434 int err;
435
436 err = matroxfb_dh_get_vblank(m2info, &vblank);
437 if (err)
438 return err;
439 if (copy_to_user((void __user *)arg, &vblank, sizeof(vblank)))
440 return -EFAULT;
441 return 0;
442 }
443 case FBIO_WAITFORVSYNC:
444 {
445 u_int32_t crt;
446
447 if (get_user(crt, (u_int32_t __user *)arg))
448 return -EFAULT;
449
450 if (crt != 0)
451 return -ENODEV;
452 return matroxfb_wait_for_sync(minfo, 1);
453 }
454 case MATROXFB_SET_OUTPUT_MODE:
455 case MATROXFB_GET_OUTPUT_MODE:
456 case MATROXFB_GET_ALL_OUTPUTS:
457 {
458 return minfo->fbcon.fbops->fb_ioctl(&minfo->fbcon, cmd, arg);
459 }
460 case MATROXFB_SET_OUTPUT_CONNECTION:
461 {
462 u_int32_t tmp;
463 int out;
464 int changes;
465
466 if (get_user(tmp, (u_int32_t __user *)arg))
467 return -EFAULT;
468 for (out = 0; out < 32; out++) {
469 if (tmp & (1 << out)) {
470 if (out >= MATROXFB_MAX_OUTPUTS)
471 return -ENXIO;
472 if (!minfo->outputs[out].output)
473 return -ENXIO;
474 switch (minfo->outputs[out].src) {
475 case MATROXFB_SRC_NONE:
476 case MATROXFB_SRC_CRTC2:
477 break;
478 default:
479 return -EBUSY;
480 }
481 }
482 }
483 if (minfo->devflags.panellink) {
484 if (tmp & MATROXFB_OUTPUT_CONN_DFP)
485 return -EINVAL;
486 if ((minfo->outputs[2].src == MATROXFB_SRC_CRTC1) && tmp)
487 return -EBUSY;
488 }
489 changes = 0;
490 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
491 if (tmp & (1 << out)) {
492 if (minfo->outputs[out].src != MATROXFB_SRC_CRTC2) {
493 changes = 1;
494 minfo->outputs[out].src = MATROXFB_SRC_CRTC2;
495 }
496 } else if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2) {
497 changes = 1;
498 minfo->outputs[out].src = MATROXFB_SRC_NONE;
499 }
500 }
501 if (!changes)
502 return 0;
503 matroxfb_dh_set_par(info);
504 return 0;
505 }
506 case MATROXFB_GET_OUTPUT_CONNECTION:
507 {
508 u_int32_t conn = 0;
509 int out;
510
511 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
512 if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2) {
513 conn |= 1 << out;
514 }
515 }
516 if (put_user(conn, (u_int32_t __user *)arg))
517 return -EFAULT;
518 return 0;
519 }
520 case MATROXFB_GET_AVAILABLE_OUTPUTS:
521 {
522 u_int32_t tmp = 0;
523 int out;
524
525 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
526 if (minfo->outputs[out].output) {
527 switch (minfo->outputs[out].src) {
528 case MATROXFB_SRC_NONE:
529 case MATROXFB_SRC_CRTC2:
530 tmp |= 1 << out;
531 break;
532 }
533 }
534 }
535 if (minfo->devflags.panellink) {
536 tmp &= ~MATROXFB_OUTPUT_CONN_DFP;
537 if (minfo->outputs[2].src == MATROXFB_SRC_CRTC1) {
538 tmp = 0;
539 }
540 }
541 if (put_user(tmp, (u_int32_t __user *)arg))
542 return -EFAULT;
543 return 0;
544 }
545 }
546 return -ENOTTY;
547 #undef m2info
548 }
549
550 static int matroxfb_dh_blank(int blank, struct fb_info* info) {
551 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
552 switch (blank) {
553 case 1:
554 case 2:
555 case 3:
556 case 4:
557 default:;
558 }
559 /* do something... */
560 return 0;
561 #undef m2info
562 }
563
564 static struct fb_ops matroxfb_dh_ops = {
565 .owner = THIS_MODULE,
566 .fb_open = matroxfb_dh_open,
567 .fb_release = matroxfb_dh_release,
568 .fb_check_var = matroxfb_dh_check_var,
569 .fb_set_par = matroxfb_dh_set_par,
570 .fb_setcolreg = matroxfb_dh_setcolreg,
571 .fb_pan_display =matroxfb_dh_pan_display,
572 .fb_blank = matroxfb_dh_blank,
573 .fb_ioctl = matroxfb_dh_ioctl,
574 .fb_fillrect = cfb_fillrect,
575 .fb_copyarea = cfb_copyarea,
576 .fb_imageblit = cfb_imageblit,
577 };
578
579 static struct fb_var_screeninfo matroxfb_dh_defined = {
580 640,480,640,480,/* W,H, virtual W,H */
581 0,0, /* offset */
582 32, /* depth */
583 0, /* gray */
584 {0,0,0}, /* R */
585 {0,0,0}, /* G */
586 {0,0,0}, /* B */
587 {0,0,0}, /* alpha */
588 0, /* nonstd */
589 FB_ACTIVATE_NOW,
590 -1,-1, /* display size */
591 0, /* accel flags */
592 39721L,48L,16L,33L,10L,
593 96L,2,0, /* no sync info */
594 FB_VMODE_NONINTERLACED,
595 0, {0,0,0,0,0}
596 };
597
598 static int matroxfb_dh_regit(const struct matrox_fb_info *minfo,
599 struct matroxfb_dh_fb_info *m2info)
600 {
601 #define minfo (m2info->primary_dev)
602 void* oldcrtc2;
603
604 m2info->fbcon.fbops = &matroxfb_dh_ops;
605 m2info->fbcon.flags = FBINFO_FLAG_DEFAULT;
606 m2info->fbcon.flags |= FBINFO_HWACCEL_XPAN |
607 FBINFO_HWACCEL_YPAN;
608 m2info->fbcon.pseudo_palette = m2info->cmap;
609 fb_alloc_cmap(&m2info->fbcon.cmap, 256, 1);
610
611 if (mem < 64)
612 mem *= 1024;
613 if (mem < 64*1024)
614 mem *= 1024;
615 mem &= ~0x00000FFF; /* PAGE_MASK? */
616 if (minfo->video.len_usable + mem <= minfo->video.len)
617 m2info->video.offbase = minfo->video.len - mem;
618 else if (minfo->video.len < mem) {
619 return -ENOMEM;
620 } else { /* check yres on first head... */
621 m2info->video.borrowed = mem;
622 minfo->video.len_usable -= mem;
623 m2info->video.offbase = minfo->video.len_usable;
624 }
625 m2info->video.base = minfo->video.base + m2info->video.offbase;
626 m2info->video.len = m2info->video.len_usable = m2info->video.len_maximum = mem;
627 m2info->video.vbase.vaddr = vaddr_va(minfo->video.vbase) + m2info->video.offbase;
628 m2info->mmio.base = minfo->mmio.base;
629 m2info->mmio.vbase = minfo->mmio.vbase;
630 m2info->mmio.len = minfo->mmio.len;
631
632 matroxfb_dh_init_fix(m2info);
633 if (register_framebuffer(&m2info->fbcon)) {
634 return -ENXIO;
635 }
636 if (!m2info->initialized)
637 fb_set_var(&m2info->fbcon, &matroxfb_dh_defined);
638 down_write(&minfo->crtc2.lock);
639 oldcrtc2 = minfo->crtc2.info;
640 minfo->crtc2.info = m2info;
641 up_write(&minfo->crtc2.lock);
642 if (oldcrtc2) {
643 printk(KERN_ERR "matroxfb_crtc2: Internal consistency check failed: crtc2 already present: %p\n",
644 oldcrtc2);
645 }
646 return 0;
647 #undef minfo
648 }
649
650 /* ************************** */
651
652 static int matroxfb_dh_registerfb(struct matroxfb_dh_fb_info* m2info) {
653 #define minfo (m2info->primary_dev)
654 if (matroxfb_dh_regit(minfo, m2info)) {
655 printk(KERN_ERR "matroxfb_crtc2: secondary head failed to register\n");
656 return -1;
657 }
658 printk(KERN_INFO "matroxfb_crtc2: secondary head of fb%u was registered as fb%u\n",
659 minfo->fbcon.node, m2info->fbcon.node);
660 m2info->fbcon_registered = 1;
661 return 0;
662 #undef minfo
663 }
664
665 static void matroxfb_dh_deregisterfb(struct matroxfb_dh_fb_info* m2info) {
666 #define minfo (m2info->primary_dev)
667 if (m2info->fbcon_registered) {
668 int id;
669 struct matroxfb_dh_fb_info* crtc2;
670
671 down_write(&minfo->crtc2.lock);
672 crtc2 = minfo->crtc2.info;
673 if (crtc2 == m2info)
674 minfo->crtc2.info = NULL;
675 up_write(&minfo->crtc2.lock);
676 if (crtc2 != m2info) {
677 printk(KERN_ERR "matroxfb_crtc2: Internal consistency check failed: crtc2 mismatch at unload: %p != %p\n",
678 crtc2, m2info);
679 printk(KERN_ERR "matroxfb_crtc2: Expect kernel crash after module unload.\n");
680 return;
681 }
682 id = m2info->fbcon.node;
683 unregister_framebuffer(&m2info->fbcon);
684 /* return memory back to primary head */
685 minfo->video.len_usable += m2info->video.borrowed;
686 printk(KERN_INFO "matroxfb_crtc2: fb%u unregistered\n", id);
687 m2info->fbcon_registered = 0;
688 }
689 #undef minfo
690 }
691
692 static void* matroxfb_crtc2_probe(struct matrox_fb_info* minfo) {
693 struct matroxfb_dh_fb_info* m2info;
694
695 /* hardware is CRTC2 incapable... */
696 if (!minfo->devflags.crtc2)
697 return NULL;
698 m2info = kzalloc(sizeof(*m2info), GFP_KERNEL);
699 if (!m2info) {
700 printk(KERN_ERR "matroxfb_crtc2: Not enough memory for CRTC2 control structs\n");
701 return NULL;
702 }
703 m2info->primary_dev = minfo;
704 if (matroxfb_dh_registerfb(m2info)) {
705 kfree(m2info);
706 printk(KERN_ERR "matroxfb_crtc2: CRTC2 framebuffer failed to register\n");
707 return NULL;
708 }
709 return m2info;
710 }
711
712 static void matroxfb_crtc2_remove(struct matrox_fb_info* minfo, void* crtc2) {
713 matroxfb_dh_deregisterfb(crtc2);
714 kfree(crtc2);
715 }
716
717 static struct matroxfb_driver crtc2 = {
718 .name = "Matrox G400 CRTC2",
719 .probe = matroxfb_crtc2_probe,
720 .remove = matroxfb_crtc2_remove };
721
722 static int matroxfb_crtc2_init(void) {
723 if (fb_get_options("matrox_crtc2fb", NULL))
724 return -ENODEV;
725
726 matroxfb_register_driver(&crtc2);
727 return 0;
728 }
729
730 static void matroxfb_crtc2_exit(void) {
731 matroxfb_unregister_driver(&crtc2);
732 }
733
734 MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>");
735 MODULE_DESCRIPTION("Matrox G400 CRTC2 driver");
736 MODULE_LICENSE("GPL");
737 module_init(matroxfb_crtc2_init);
738 module_exit(matroxfb_crtc2_exit);
739 /* we do not have __setup() yet */