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Avoid beyond bounds copy while caching ACL
[zen-stable.git] / drivers / video / matrox / matroxfb_crtc2.c
blob02796a4317a94c95e3d2ae10649f69e36490c7fd
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/slab.h>
19 #include <linux/uaccess.h>
20
21 /* **************************************************** */
22
23 static int mem = 8192;
24
25 module_param(mem, int, 0);
26 MODULE_PARM_DESC(mem, "Memory size reserved for dualhead (default=8MB)");
27
28 /* **************************************************** */
29
30 static int matroxfb_dh_setcolreg(unsigned regno, unsigned red, unsigned green,
31 unsigned blue, unsigned transp, struct fb_info* info) {
32 u_int32_t col;
33 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
34
35 if (regno >= 16)
36 return 1;
37 if (m2info->fbcon.var.grayscale) {
38 /* gray = 0.30*R + 0.59*G + 0.11*B */
39 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
40 }
41 red = CNVT_TOHW(red, m2info->fbcon.var.red.length);
42 green = CNVT_TOHW(green, m2info->fbcon.var.green.length);
43 blue = CNVT_TOHW(blue, m2info->fbcon.var.blue.length);
44 transp = CNVT_TOHW(transp, m2info->fbcon.var.transp.length);
45
46 col = (red << m2info->fbcon.var.red.offset) |
47 (green << m2info->fbcon.var.green.offset) |
48 (blue << m2info->fbcon.var.blue.offset) |
49 (transp << m2info->fbcon.var.transp.offset);
50
51 switch (m2info->fbcon.var.bits_per_pixel) {
52 case 16:
53 m2info->cmap[regno] = col | (col << 16);
54 break;
55 case 32:
56 m2info->cmap[regno] = col;
57 break;
58 }
59 return 0;
60 #undef m2info
61 }
62
63 static void matroxfb_dh_restore(struct matroxfb_dh_fb_info* m2info,
64 struct my_timming* mt,
65 int mode,
66 unsigned int pos) {
67 u_int32_t tmp;
68 u_int32_t datactl;
69 struct matrox_fb_info *minfo = m2info->primary_dev;
70
71 switch (mode) {
72 case 15:
73 tmp = 0x00200000;
74 break;
75 case 16:
76 tmp = 0x00400000;
77 break;
78 /* case 32: */
79 default:
80 tmp = 0x00800000;
81 break;
82 }
83 tmp |= 0x00000001; /* enable CRTC2 */
84 datactl = 0;
85 if (minfo->outputs[1].src == MATROXFB_SRC_CRTC2) {
86 if (minfo->devflags.g450dac) {
87 tmp |= 0x00000006; /* source from secondary pixel PLL */
88 /* no vidrst when in monitor mode */
89 if (minfo->outputs[1].mode != MATROXFB_OUTPUT_MODE_MONITOR) {
90 tmp |= 0xC0001000; /* Enable H/V vidrst */
91 }
92 } else {
93 tmp |= 0x00000002; /* source from VDOCLK */
94 tmp |= 0xC0000000; /* enable vvidrst & hvidrst */
95 /* MGA TVO is our clock source */
96 }
97 } else if (minfo->outputs[0].src == MATROXFB_SRC_CRTC2) {
98 tmp |= 0x00000004; /* source from pixclock */
99 /* PIXPLL is our clock source */
100 }
101 if (minfo->outputs[0].src == MATROXFB_SRC_CRTC2) {
102 tmp |= 0x00100000; /* connect CRTC2 to DAC */
103 }
104 if (mt->interlaced) {
105 tmp |= 0x02000000; /* interlaced, second field is bigger, as G450 apparently ignores it */
106 mt->VDisplay >>= 1;
107 mt->VSyncStart >>= 1;
108 mt->VSyncEnd >>= 1;
109 mt->VTotal >>= 1;
110 }
111 if ((mt->HTotal & 7) == 2) {
112 datactl |= 0x00000010;
113 mt->HTotal &= ~7;
114 }
115 tmp |= 0x10000000; /* 0x10000000 is VIDRST polarity */
116 mga_outl(0x3C14, ((mt->HDisplay - 8) << 16) | (mt->HTotal - 8));
117 mga_outl(0x3C18, ((mt->HSyncEnd - 8) << 16) | (mt->HSyncStart - 8));
118 mga_outl(0x3C1C, ((mt->VDisplay - 1) << 16) | (mt->VTotal - 1));
119 mga_outl(0x3C20, ((mt->VSyncEnd - 1) << 16) | (mt->VSyncStart - 1));
120 mga_outl(0x3C24, ((mt->VSyncStart) << 16) | (mt->HSyncStart)); /* preload */
121 {
122 u_int32_t linelen = m2info->fbcon.var.xres_virtual * (m2info->fbcon.var.bits_per_pixel >> 3);
123 if (tmp & 0x02000000) {
124 /* field #0 is smaller, so... */
125 mga_outl(0x3C2C, pos); /* field #1 vmemory start */
126 mga_outl(0x3C28, pos + linelen); /* field #0 vmemory start */
127 linelen <<= 1;
128 m2info->interlaced = 1;
129 } else {
130 mga_outl(0x3C28, pos); /* vmemory start */
131 m2info->interlaced = 0;
132 }
133 mga_outl(0x3C40, linelen);
134 }
135 mga_outl(0x3C4C, datactl); /* data control */
136 if (tmp & 0x02000000) {
137 int i;
138
139 mga_outl(0x3C10, tmp & ~0x02000000);
140 for (i = 0; i < 2; i++) {
141 unsigned int nl;
142 unsigned int lastl = 0;
143
144 while ((nl = mga_inl(0x3C48) & 0xFFF) >= lastl) {
145 lastl = nl;
146 }
147 }
148 }
149 mga_outl(0x3C10, tmp);
150 minfo->hw.crtc2.ctl = tmp;
151
152 tmp = mt->VDisplay << 16; /* line compare */
153 if (mt->sync & FB_SYNC_HOR_HIGH_ACT)
154 tmp |= 0x00000100;
155 if (mt->sync & FB_SYNC_VERT_HIGH_ACT)
156 tmp |= 0x00000200;
157 mga_outl(0x3C44, tmp);
158 }
159
160 static void matroxfb_dh_disable(struct matroxfb_dh_fb_info* m2info) {
161 struct matrox_fb_info *minfo = m2info->primary_dev;
162
163 mga_outl(0x3C10, 0x00000004); /* disable CRTC2, CRTC1->DAC1, PLL as clock source */
164 minfo->hw.crtc2.ctl = 0x00000004;
165 }
166
167 static void matroxfb_dh_pan_var(struct matroxfb_dh_fb_info* m2info,
168 struct fb_var_screeninfo* var) {
169 unsigned int pos;
170 unsigned int linelen;
171 unsigned int pixelsize;
172 struct matrox_fb_info *minfo = m2info->primary_dev;
173
174 m2info->fbcon.var.xoffset = var->xoffset;
175 m2info->fbcon.var.yoffset = var->yoffset;
176 pixelsize = m2info->fbcon.var.bits_per_pixel >> 3;
177 linelen = m2info->fbcon.var.xres_virtual * pixelsize;
178 pos = m2info->fbcon.var.yoffset * linelen + m2info->fbcon.var.xoffset * pixelsize;
179 pos += m2info->video.offbase;
180 if (m2info->interlaced) {
181 mga_outl(0x3C2C, pos);
182 mga_outl(0x3C28, pos + linelen);
183 } else {
184 mga_outl(0x3C28, pos);
185 }
186 }
187
188 static int matroxfb_dh_decode_var(struct matroxfb_dh_fb_info* m2info,
189 struct fb_var_screeninfo* var,
190 int *visual,
191 int *video_cmap_len,
192 int *mode) {
193 unsigned int mask;
194 unsigned int memlen;
195 unsigned int vramlen;
196
197 switch (var->bits_per_pixel) {
198 case 16: mask = 0x1F;
199 break;
200 case 32: mask = 0x0F;
201 break;
202 default: return -EINVAL;
203 }
204 vramlen = m2info->video.len_usable;
205 if (var->yres_virtual < var->yres)
206 var->yres_virtual = var->yres;
207 if (var->xres_virtual < var->xres)
208 var->xres_virtual = var->xres;
209 var->xres_virtual = (var->xres_virtual + mask) & ~mask;
210 if (var->yres_virtual > 32767)
211 return -EINVAL;
212 memlen = var->xres_virtual * var->yres_virtual * (var->bits_per_pixel >> 3);
213 if (memlen > vramlen)
214 return -EINVAL;
215 if (var->xoffset + var->xres > var->xres_virtual)
216 var->xoffset = var->xres_virtual - var->xres;
217 if (var->yoffset + var->yres > var->yres_virtual)
218 var->yoffset = var->yres_virtual - var->yres;
219
220 var->xres &= ~7;
221 var->left_margin &= ~7;
222 var->right_margin &= ~7;
223 var->hsync_len &= ~7;
224
225 *mode = var->bits_per_pixel;
226 if (var->bits_per_pixel == 16) {
227 if (var->green.length == 5) {
228 var->red.offset = 10;
229 var->red.length = 5;
230 var->green.offset = 5;
231 var->green.length = 5;
232 var->blue.offset = 0;
233 var->blue.length = 5;
234 var->transp.offset = 15;
235 var->transp.length = 1;
236 *mode = 15;
237 } else {
238 var->red.offset = 11;
239 var->red.length = 5;
240 var->green.offset = 5;
241 var->green.length = 6;
242 var->blue.offset = 0;
243 var->blue.length = 5;
244 var->transp.offset = 0;
245 var->transp.length = 0;
246 }
247 } else {
248 var->red.offset = 16;
249 var->red.length = 8;
250 var->green.offset = 8;
251 var->green.length = 8;
252 var->blue.offset = 0;
253 var->blue.length = 8;
254 var->transp.offset = 24;
255 var->transp.length = 8;
256 }
257 *visual = FB_VISUAL_TRUECOLOR;
258 *video_cmap_len = 16;
259 return 0;
260 }
261
262 static int matroxfb_dh_open(struct fb_info* info, int user) {
263 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
264 struct matrox_fb_info *minfo = m2info->primary_dev;
265
266 if (minfo) {
267 int err;
268
269 if (minfo->dead) {
270 return -ENXIO;
271 }
272 err = minfo->fbops.fb_open(&minfo->fbcon, user);
273 if (err) {
274 return err;
275 }
276 }
277 return 0;
278 #undef m2info
279 }
280
281 static int matroxfb_dh_release(struct fb_info* info, int user) {
282 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
283 int err = 0;
284 struct matrox_fb_info *minfo = m2info->primary_dev;
285
286 if (minfo) {
287 err = minfo->fbops.fb_release(&minfo->fbcon, user);
288 }
289 return err;
290 #undef m2info
291 }
292
293 /*
294 * This function is called before the register_framebuffer so
295 * no locking is needed.
296 */
297 static void matroxfb_dh_init_fix(struct matroxfb_dh_fb_info *m2info)
298 {
299 struct fb_fix_screeninfo *fix = &m2info->fbcon.fix;
300
301 strcpy(fix->id, "MATROX DH");
302
303 fix->smem_start = m2info->video.base;
304 fix->smem_len = m2info->video.len_usable;
305 fix->ypanstep = 1;
306 fix->ywrapstep = 0;
307 fix->xpanstep = 8; /* TBD */
308 fix->mmio_start = m2info->mmio.base;
309 fix->mmio_len = m2info->mmio.len;
310 fix->accel = 0; /* no accel... */
311 }
312
313 static int matroxfb_dh_check_var(struct fb_var_screeninfo* var, struct fb_info* info) {
314 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
315 int visual;
316 int cmap_len;
317 int mode;
318
319 return matroxfb_dh_decode_var(m2info, var, &visual, &cmap_len, &mode);
320 #undef m2info
321 }
322
323 static int matroxfb_dh_set_par(struct fb_info* info) {
324 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
325 int visual;
326 int cmap_len;
327 int mode;
328 int err;
329 struct fb_var_screeninfo* var = &info->var;
330 struct matrox_fb_info *minfo = m2info->primary_dev;
331
332 if ((err = matroxfb_dh_decode_var(m2info, var, &visual, &cmap_len, &mode)) != 0)
333 return err;
334 /* cmap */
335 {
336 m2info->fbcon.screen_base = vaddr_va(m2info->video.vbase);
337 m2info->fbcon.fix.visual = visual;
338 m2info->fbcon.fix.type = FB_TYPE_PACKED_PIXELS;
339 m2info->fbcon.fix.type_aux = 0;
340 m2info->fbcon.fix.line_length = (var->xres_virtual * var->bits_per_pixel) >> 3;
341 }
342 {
343 struct my_timming mt;
344 unsigned int pos;
345 int out;
346 int cnt;
347
348 matroxfb_var2my(&m2info->fbcon.var, &mt);
349 mt.crtc = MATROXFB_SRC_CRTC2;
350 /* CRTC2 delay */
351 mt.delay = 34;
352
353 pos = (m2info->fbcon.var.yoffset * m2info->fbcon.var.xres_virtual + m2info->fbcon.var.xoffset) * m2info->fbcon.var.bits_per_pixel >> 3;
354 pos += m2info->video.offbase;
355 cnt = 0;
356 down_read(&minfo->altout.lock);
357 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
358 if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2) {
359 cnt++;
360 if (minfo->outputs[out].output->compute) {
361 minfo->outputs[out].output->compute(minfo->outputs[out].data, &mt);
362 }
363 }
364 }
365 minfo->crtc2.pixclock = mt.pixclock;
366 minfo->crtc2.mnp = mt.mnp;
367 up_read(&minfo->altout.lock);
368 if (cnt) {
369 matroxfb_dh_restore(m2info, &mt, mode, pos);
370 } else {
371 matroxfb_dh_disable(m2info);
372 }
373 DAC1064_global_init(minfo);
374 DAC1064_global_restore(minfo);
375 down_read(&minfo->altout.lock);
376 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
377 if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2 &&
378 minfo->outputs[out].output->program) {
379 minfo->outputs[out].output->program(minfo->outputs[out].data);
380 }
381 }
382 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
383 if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2 &&
384 minfo->outputs[out].output->start) {
385 minfo->outputs[out].output->start(minfo->outputs[out].data);
386 }
387 }
388 up_read(&minfo->altout.lock);
389 }
390 m2info->initialized = 1;
391 return 0;
392 #undef m2info
393 }
394
395 static int matroxfb_dh_pan_display(struct fb_var_screeninfo* var, struct fb_info* info) {
396 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
397 matroxfb_dh_pan_var(m2info, var);
398 return 0;
399 #undef m2info
400 }
401
402 static int matroxfb_dh_get_vblank(const struct matroxfb_dh_fb_info* m2info, struct fb_vblank* vblank) {
403 struct matrox_fb_info *minfo = m2info->primary_dev;
404
405 matroxfb_enable_irq(minfo, 0);
406 memset(vblank, 0, sizeof(*vblank));
407 vblank->flags = FB_VBLANK_HAVE_VCOUNT | FB_VBLANK_HAVE_VBLANK;
408 /* mask out reserved bits + field number (odd/even) */
409 vblank->vcount = mga_inl(0x3C48) & 0x000007FF;
410 /* compatibility stuff */
411 if (vblank->vcount >= m2info->fbcon.var.yres)
412 vblank->flags |= FB_VBLANK_VBLANKING;
413 if (test_bit(0, &minfo->irq_flags)) {
414 vblank->flags |= FB_VBLANK_HAVE_COUNT;
415 /* Only one writer, aligned int value...
416 it should work without lock and without atomic_t */
417 vblank->count = minfo->crtc2.vsync.cnt;
418 }
419 return 0;
420 }
421
422 static int matroxfb_dh_ioctl(struct fb_info *info,
423 unsigned int cmd,
424 unsigned long arg)
425 {
426 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
427 struct matrox_fb_info *minfo = m2info->primary_dev;
428
429 DBG(__func__)
430
431 switch (cmd) {
432 case FBIOGET_VBLANK:
433 {
434 struct fb_vblank vblank;
435 int err;
436
437 err = matroxfb_dh_get_vblank(m2info, &vblank);
438 if (err)
439 return err;
440 if (copy_to_user((void __user *)arg, &vblank, sizeof(vblank)))
441 return -EFAULT;
442 return 0;
443 }
444 case FBIO_WAITFORVSYNC:
445 {
446 u_int32_t crt;
447
448 if (get_user(crt, (u_int32_t __user *)arg))
449 return -EFAULT;
450
451 if (crt != 0)
452 return -ENODEV;
453 return matroxfb_wait_for_sync(minfo, 1);
454 }
455 case MATROXFB_SET_OUTPUT_MODE:
456 case MATROXFB_GET_OUTPUT_MODE:
457 case MATROXFB_GET_ALL_OUTPUTS:
458 {
459 return minfo->fbcon.fbops->fb_ioctl(&minfo->fbcon, cmd, arg);
460 }
461 case MATROXFB_SET_OUTPUT_CONNECTION:
462 {
463 u_int32_t tmp;
464 int out;
465 int changes;
466
467 if (get_user(tmp, (u_int32_t __user *)arg))
468 return -EFAULT;
469 for (out = 0; out < 32; out++) {
470 if (tmp & (1 << out)) {
471 if (out >= MATROXFB_MAX_OUTPUTS)
472 return -ENXIO;
473 if (!minfo->outputs[out].output)
474 return -ENXIO;
475 switch (minfo->outputs[out].src) {
476 case MATROXFB_SRC_NONE:
477 case MATROXFB_SRC_CRTC2:
478 break;
479 default:
480 return -EBUSY;
481 }
482 }
483 }
484 if (minfo->devflags.panellink) {
485 if (tmp & MATROXFB_OUTPUT_CONN_DFP)
486 return -EINVAL;
487 if ((minfo->outputs[2].src == MATROXFB_SRC_CRTC1) && tmp)
488 return -EBUSY;
489 }
490 changes = 0;
491 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
492 if (tmp & (1 << out)) {
493 if (minfo->outputs[out].src != MATROXFB_SRC_CRTC2) {
494 changes = 1;
495 minfo->outputs[out].src = MATROXFB_SRC_CRTC2;
496 }
497 } else if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2) {
498 changes = 1;
499 minfo->outputs[out].src = MATROXFB_SRC_NONE;
500 }
501 }
502 if (!changes)
503 return 0;
504 matroxfb_dh_set_par(info);
505 return 0;
506 }
507 case MATROXFB_GET_OUTPUT_CONNECTION:
508 {
509 u_int32_t conn = 0;
510 int out;
511
512 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
513 if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2) {
514 conn |= 1 << out;
515 }
516 }
517 if (put_user(conn, (u_int32_t __user *)arg))
518 return -EFAULT;
519 return 0;
520 }
521 case MATROXFB_GET_AVAILABLE_OUTPUTS:
522 {
523 u_int32_t tmp = 0;
524 int out;
525
526 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
527 if (minfo->outputs[out].output) {
528 switch (minfo->outputs[out].src) {
529 case MATROXFB_SRC_NONE:
530 case MATROXFB_SRC_CRTC2:
531 tmp |= 1 << out;
532 break;
533 }
534 }
535 }
536 if (minfo->devflags.panellink) {
537 tmp &= ~MATROXFB_OUTPUT_CONN_DFP;
538 if (minfo->outputs[2].src == MATROXFB_SRC_CRTC1) {
539 tmp = 0;
540 }
541 }
542 if (put_user(tmp, (u_int32_t __user *)arg))
543 return -EFAULT;
544 return 0;
545 }
546 }
547 return -ENOTTY;
548 #undef m2info
549 }
550
551 static int matroxfb_dh_blank(int blank, struct fb_info* info) {
552 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
553 switch (blank) {
554 case 1:
555 case 2:
556 case 3:
557 case 4:
558 default:;
559 }
560 /* do something... */
561 return 0;
562 #undef m2info
563 }
564
565 static struct fb_ops matroxfb_dh_ops = {
566 .owner = THIS_MODULE,
567 .fb_open = matroxfb_dh_open,
568 .fb_release = matroxfb_dh_release,
569 .fb_check_var = matroxfb_dh_check_var,
570 .fb_set_par = matroxfb_dh_set_par,
571 .fb_setcolreg = matroxfb_dh_setcolreg,
572 .fb_pan_display =matroxfb_dh_pan_display,
573 .fb_blank = matroxfb_dh_blank,
574 .fb_ioctl = matroxfb_dh_ioctl,
575 .fb_fillrect = cfb_fillrect,
576 .fb_copyarea = cfb_copyarea,
577 .fb_imageblit = cfb_imageblit,
578 };
579
580 static struct fb_var_screeninfo matroxfb_dh_defined = {
581 640,480,640,480,/* W,H, virtual W,H */
582 0,0, /* offset */
583 32, /* depth */
584 0, /* gray */
585 {0,0,0}, /* R */
586 {0,0,0}, /* G */
587 {0,0,0}, /* B */
588 {0,0,0}, /* alpha */
589 0, /* nonstd */
590 FB_ACTIVATE_NOW,
591 -1,-1, /* display size */
592 0, /* accel flags */
593 39721L,48L,16L,33L,10L,
594 96L,2,0, /* no sync info */
595 FB_VMODE_NONINTERLACED,
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 */