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Linux-2.6.12-rc2
[mirror_ubuntu-zesty-kernel.git] / drivers / video / matrox / matroxfb_crtc2.c
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 <asm/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_cfbX_init(struct matroxfb_dh_fb_info* m2info) {
167 /* no acceleration for secondary head... */
168 m2info->cmap[16] = 0xFFFFFFFF;
169 }
170
171 static void matroxfb_dh_pan_var(struct matroxfb_dh_fb_info* m2info,
172 struct fb_var_screeninfo* var) {
173 unsigned int pos;
174 unsigned int linelen;
175 unsigned int pixelsize;
176 MINFO_FROM(m2info->primary_dev);
177
178 m2info->fbcon.var.xoffset = var->xoffset;
179 m2info->fbcon.var.yoffset = var->yoffset;
180 pixelsize = m2info->fbcon.var.bits_per_pixel >> 3;
181 linelen = m2info->fbcon.var.xres_virtual * pixelsize;
182 pos = m2info->fbcon.var.yoffset * linelen + m2info->fbcon.var.xoffset * pixelsize;
183 pos += m2info->video.offbase;
184 if (m2info->interlaced) {
185 mga_outl(0x3C2C, pos);
186 mga_outl(0x3C28, pos + linelen);
187 } else {
188 mga_outl(0x3C28, pos);
189 }
190 }
191
192 static int matroxfb_dh_decode_var(struct matroxfb_dh_fb_info* m2info,
193 struct fb_var_screeninfo* var,
194 int *visual,
195 int *video_cmap_len,
196 int *mode) {
197 unsigned int mask;
198 unsigned int memlen;
199 unsigned int vramlen;
200
201 switch (var->bits_per_pixel) {
202 case 16: mask = 0x1F;
203 break;
204 case 32: mask = 0x0F;
205 break;
206 default: return -EINVAL;
207 }
208 vramlen = m2info->video.len_usable;
209 if (var->yres_virtual < var->yres)
210 var->yres_virtual = var->yres;
211 if (var->xres_virtual < var->xres)
212 var->xres_virtual = var->xres;
213 var->xres_virtual = (var->xres_virtual + mask) & ~mask;
214 if (var->yres_virtual > 32767)
215 return -EINVAL;
216 memlen = var->xres_virtual * var->yres_virtual * (var->bits_per_pixel >> 3);
217 if (memlen > vramlen)
218 return -EINVAL;
219 if (var->xoffset + var->xres > var->xres_virtual)
220 var->xoffset = var->xres_virtual - var->xres;
221 if (var->yoffset + var->yres > var->yres_virtual)
222 var->yoffset = var->yres_virtual - var->yres;
223
224 var->xres &= ~7;
225 var->left_margin &= ~7;
226 var->right_margin &= ~7;
227 var->hsync_len &= ~7;
228
229 *mode = var->bits_per_pixel;
230 if (var->bits_per_pixel == 16) {
231 if (var->green.length == 5) {
232 var->red.offset = 10;
233 var->red.length = 5;
234 var->green.offset = 5;
235 var->green.length = 5;
236 var->blue.offset = 0;
237 var->blue.length = 5;
238 var->transp.offset = 15;
239 var->transp.length = 1;
240 *mode = 15;
241 } else {
242 var->red.offset = 11;
243 var->red.length = 5;
244 var->green.offset = 5;
245 var->green.length = 6;
246 var->blue.offset = 0;
247 var->blue.length = 5;
248 var->transp.offset = 0;
249 var->transp.length = 0;
250 }
251 } else {
252 var->red.offset = 16;
253 var->red.length = 8;
254 var->green.offset = 8;
255 var->green.length = 8;
256 var->blue.offset = 0;
257 var->blue.length = 8;
258 var->transp.offset = 24;
259 var->transp.length = 8;
260 }
261 *visual = FB_VISUAL_TRUECOLOR;
262 *video_cmap_len = 16;
263 return 0;
264 }
265
266 static int matroxfb_dh_open(struct fb_info* info, int user) {
267 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
268 MINFO_FROM(m2info->primary_dev);
269
270 if (MINFO) {
271 int err;
272
273 if (ACCESS_FBINFO(dead)) {
274 return -ENXIO;
275 }
276 err = ACCESS_FBINFO(fbops).fb_open(&ACCESS_FBINFO(fbcon), user);
277 if (err) {
278 return err;
279 }
280 }
281 return 0;
282 #undef m2info
283 }
284
285 static int matroxfb_dh_release(struct fb_info* info, int user) {
286 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
287 int err = 0;
288 MINFO_FROM(m2info->primary_dev);
289
290 if (MINFO) {
291 err = ACCESS_FBINFO(fbops).fb_release(&ACCESS_FBINFO(fbcon), user);
292 }
293 return err;
294 #undef m2info
295 }
296
297 static void matroxfb_dh_init_fix(struct matroxfb_dh_fb_info *m2info) {
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 MINFO_FROM(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(&ACCESS_FBINFO(altout).lock);
356 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
357 if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2) {
358 cnt++;
359 if (ACCESS_FBINFO(outputs[out]).output->compute) {
360 ACCESS_FBINFO(outputs[out]).output->compute(ACCESS_FBINFO(outputs[out]).data, &mt);
361 }
362 }
363 }
364 ACCESS_FBINFO(crtc2).pixclock = mt.pixclock;
365 ACCESS_FBINFO(crtc2).mnp = mt.mnp;
366 up_read(&ACCESS_FBINFO(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(PMINFO2);
373 DAC1064_global_restore(PMINFO2);
374 down_read(&ACCESS_FBINFO(altout).lock);
375 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
376 if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2 &&
377 ACCESS_FBINFO(outputs[out]).output->program) {
378 ACCESS_FBINFO(outputs[out]).output->program(ACCESS_FBINFO(outputs[out]).data);
379 }
380 }
381 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
382 if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2 &&
383 ACCESS_FBINFO(outputs[out]).output->start) {
384 ACCESS_FBINFO(outputs[out]).output->start(ACCESS_FBINFO(outputs[out]).data);
385 }
386 }
387 up_read(&ACCESS_FBINFO(altout).lock);
388 matroxfb_dh_cfbX_init(m2info);
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 MINFO_FROM(m2info->primary_dev);
404
405 matroxfb_enable_irq(PMINFO 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, &ACCESS_FBINFO(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 = ACCESS_FBINFO(crtc2).vsync.cnt;
418 }
419 return 0;
420 }
421
422 static int matroxfb_dh_ioctl(struct inode* inode,
423 struct file* file,
424 unsigned int cmd,
425 unsigned long arg,
426 struct fb_info* info) {
427 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
428 MINFO_FROM(m2info->primary_dev);
429
430 DBG(__FUNCTION__)
431
432 switch (cmd) {
433 case FBIOGET_VBLANK:
434 {
435 struct fb_vblank vblank;
436 int err;
437
438 err = matroxfb_dh_get_vblank(m2info, &vblank);
439 if (err)
440 return err;
441 if (copy_to_user((void __user *)arg, &vblank, sizeof(vblank)))
442 return -EFAULT;
443 return 0;
444 }
445 case FBIO_WAITFORVSYNC:
446 {
447 u_int32_t crt;
448
449 if (get_user(crt, (u_int32_t __user *)arg))
450 return -EFAULT;
451
452 if (crt != 0)
453 return -ENODEV;
454 return matroxfb_wait_for_sync(PMINFO 1);
455 }
456 case MATROXFB_SET_OUTPUT_MODE:
457 case MATROXFB_GET_OUTPUT_MODE:
458 case MATROXFB_GET_ALL_OUTPUTS:
459 {
460 return ACCESS_FBINFO(fbcon.fbops)->fb_ioctl(inode, file, cmd, arg, &ACCESS_FBINFO(fbcon));
461 }
462 case MATROXFB_SET_OUTPUT_CONNECTION:
463 {
464 u_int32_t tmp;
465 int out;
466 int changes;
467
468 if (get_user(tmp, (u_int32_t __user *)arg))
469 return -EFAULT;
470 for (out = 0; out < 32; out++) {
471 if (tmp & (1 << out)) {
472 if (out >= MATROXFB_MAX_OUTPUTS)
473 return -ENXIO;
474 if (!ACCESS_FBINFO(outputs[out]).output)
475 return -ENXIO;
476 switch (ACCESS_FBINFO(outputs[out]).src) {
477 case MATROXFB_SRC_NONE:
478 case MATROXFB_SRC_CRTC2:
479 break;
480 default:
481 return -EBUSY;
482 }
483 }
484 }
485 if (ACCESS_FBINFO(devflags.panellink)) {
486 if (tmp & MATROXFB_OUTPUT_CONN_DFP)
487 return -EINVAL;
488 if ((ACCESS_FBINFO(outputs[2]).src == MATROXFB_SRC_CRTC1) && tmp)
489 return -EBUSY;
490 }
491 changes = 0;
492 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
493 if (tmp & (1 << out)) {
494 if (ACCESS_FBINFO(outputs[out]).src != MATROXFB_SRC_CRTC2) {
495 changes = 1;
496 ACCESS_FBINFO(outputs[out]).src = MATROXFB_SRC_CRTC2;
497 }
498 } else if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2) {
499 changes = 1;
500 ACCESS_FBINFO(outputs[out]).src = MATROXFB_SRC_NONE;
501 }
502 }
503 if (!changes)
504 return 0;
505 matroxfb_dh_set_par(info);
506 return 0;
507 }
508 case MATROXFB_GET_OUTPUT_CONNECTION:
509 {
510 u_int32_t conn = 0;
511 int out;
512
513 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
514 if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2) {
515 conn |= 1 << out;
516 }
517 }
518 if (put_user(conn, (u_int32_t __user *)arg))
519 return -EFAULT;
520 return 0;
521 }
522 case MATROXFB_GET_AVAILABLE_OUTPUTS:
523 {
524 u_int32_t tmp = 0;
525 int out;
526
527 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
528 if (ACCESS_FBINFO(outputs[out]).output) {
529 switch (ACCESS_FBINFO(outputs[out]).src) {
530 case MATROXFB_SRC_NONE:
531 case MATROXFB_SRC_CRTC2:
532 tmp |= 1 << out;
533 break;
534 }
535 }
536 }
537 if (ACCESS_FBINFO(devflags.panellink)) {
538 tmp &= ~MATROXFB_OUTPUT_CONN_DFP;
539 if (ACCESS_FBINFO(outputs[2]).src == MATROXFB_SRC_CRTC1) {
540 tmp = 0;
541 }
542 }
543 if (put_user(tmp, (u_int32_t __user *)arg))
544 return -EFAULT;
545 return 0;
546 }
547 }
548 return -ENOTTY;
549 #undef m2info
550 }
551
552 static int matroxfb_dh_blank(int blank, struct fb_info* info) {
553 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
554 switch (blank) {
555 case 1:
556 case 2:
557 case 3:
558 case 4:
559 default:;
560 }
561 /* do something... */
562 return 0;
563 #undef m2info
564 }
565
566 static struct fb_ops matroxfb_dh_ops = {
567 .owner = THIS_MODULE,
568 .fb_open = matroxfb_dh_open,
569 .fb_release = matroxfb_dh_release,
570 .fb_check_var = matroxfb_dh_check_var,
571 .fb_set_par = matroxfb_dh_set_par,
572 .fb_setcolreg = matroxfb_dh_setcolreg,
573 .fb_pan_display =matroxfb_dh_pan_display,
574 .fb_blank = matroxfb_dh_blank,
575 .fb_ioctl = matroxfb_dh_ioctl,
576 .fb_fillrect = cfb_fillrect,
577 .fb_copyarea = cfb_copyarea,
578 .fb_imageblit = cfb_imageblit,
579 .fb_cursor = soft_cursor,
580 };
581
582 static struct fb_var_screeninfo matroxfb_dh_defined = {
583 640,480,640,480,/* W,H, virtual W,H */
584 0,0, /* offset */
585 32, /* depth */
586 0, /* gray */
587 {0,0,0}, /* R */
588 {0,0,0}, /* G */
589 {0,0,0}, /* B */
590 {0,0,0}, /* alpha */
591 0, /* nonstd */
592 FB_ACTIVATE_NOW,
593 -1,-1, /* display size */
594 0, /* accel flags */
595 39721L,48L,16L,33L,10L,
596 96L,2,0, /* no sync info */
597 FB_VMODE_NONINTERLACED,
598 0, {0,0,0,0,0}
599 };
600
601 static int matroxfb_dh_regit(CPMINFO struct matroxfb_dh_fb_info* m2info) {
602 #define minfo (m2info->primary_dev)
603 void* oldcrtc2;
604
605 m2info->fbcon.fbops = &matroxfb_dh_ops;
606 m2info->fbcon.flags = FBINFO_FLAG_DEFAULT;
607 m2info->fbcon.flags |= FBINFO_HWACCEL_XPAN |
608 FBINFO_HWACCEL_YPAN;
609 m2info->fbcon.pseudo_palette = m2info->cmap;
610 fb_alloc_cmap(&m2info->fbcon.cmap, 256, 1);
611
612 if (mem < 64)
613 mem *= 1024;
614 if (mem < 64*1024)
615 mem *= 1024;
616 mem &= ~0x00000FFF; /* PAGE_MASK? */
617 if (ACCESS_FBINFO(video.len_usable) + mem <= ACCESS_FBINFO(video.len))
618 m2info->video.offbase = ACCESS_FBINFO(video.len) - mem;
619 else if (ACCESS_FBINFO(video.len) < mem) {
620 return -ENOMEM;
621 } else { /* check yres on first head... */
622 m2info->video.borrowed = mem;
623 ACCESS_FBINFO(video.len_usable) -= mem;
624 m2info->video.offbase = ACCESS_FBINFO(video.len_usable);
625 }
626 m2info->video.base = ACCESS_FBINFO(video.base) + m2info->video.offbase;
627 m2info->video.len = m2info->video.len_usable = m2info->video.len_maximum = mem;
628 m2info->video.vbase.vaddr = vaddr_va(ACCESS_FBINFO(video.vbase)) + m2info->video.offbase;
629 m2info->mmio.base = ACCESS_FBINFO(mmio.base);
630 m2info->mmio.vbase = ACCESS_FBINFO(mmio.vbase);
631 m2info->mmio.len = ACCESS_FBINFO(mmio.len);
632
633 matroxfb_dh_init_fix(m2info);
634 if (register_framebuffer(&m2info->fbcon)) {
635 return -ENXIO;
636 }
637 if (!m2info->initialized)
638 fb_set_var(&m2info->fbcon, &matroxfb_dh_defined);
639 down_write(&ACCESS_FBINFO(crtc2.lock));
640 oldcrtc2 = ACCESS_FBINFO(crtc2.info);
641 ACCESS_FBINFO(crtc2.info) = m2info;
642 up_write(&ACCESS_FBINFO(crtc2.lock));
643 if (oldcrtc2) {
644 printk(KERN_ERR "matroxfb_crtc2: Internal consistency check failed: crtc2 already present: %p\n",
645 oldcrtc2);
646 }
647 return 0;
648 #undef minfo
649 }
650
651 /* ************************** */
652
653 static int matroxfb_dh_registerfb(struct matroxfb_dh_fb_info* m2info) {
654 #define minfo (m2info->primary_dev)
655 if (matroxfb_dh_regit(PMINFO m2info)) {
656 printk(KERN_ERR "matroxfb_crtc2: secondary head failed to register\n");
657 return -1;
658 }
659 printk(KERN_INFO "matroxfb_crtc2: secondary head of fb%u was registered as fb%u\n",
660 ACCESS_FBINFO(fbcon.node), m2info->fbcon.node);
661 m2info->fbcon_registered = 1;
662 return 0;
663 #undef minfo
664 }
665
666 static void matroxfb_dh_deregisterfb(struct matroxfb_dh_fb_info* m2info) {
667 #define minfo (m2info->primary_dev)
668 if (m2info->fbcon_registered) {
669 int id;
670 struct matroxfb_dh_fb_info* crtc2;
671
672 down_write(&ACCESS_FBINFO(crtc2.lock));
673 crtc2 = ACCESS_FBINFO(crtc2.info);
674 if (crtc2 == m2info)
675 ACCESS_FBINFO(crtc2.info) = NULL;
676 up_write(&ACCESS_FBINFO(crtc2.lock));
677 if (crtc2 != m2info) {
678 printk(KERN_ERR "matroxfb_crtc2: Internal consistency check failed: crtc2 mismatch at unload: %p != %p\n",
679 crtc2, m2info);
680 printk(KERN_ERR "matroxfb_crtc2: Expect kernel crash after module unload.\n");
681 return;
682 }
683 id = m2info->fbcon.node;
684 unregister_framebuffer(&m2info->fbcon);
685 /* return memory back to primary head */
686 ACCESS_FBINFO(video.len_usable) += m2info->video.borrowed;
687 printk(KERN_INFO "matroxfb_crtc2: fb%u unregistered\n", id);
688 m2info->fbcon_registered = 0;
689 }
690 #undef minfo
691 }
692
693 static void* matroxfb_crtc2_probe(struct matrox_fb_info* minfo) {
694 struct matroxfb_dh_fb_info* m2info;
695
696 /* hardware is CRTC2 incapable... */
697 if (!ACCESS_FBINFO(devflags.crtc2))
698 return NULL;
699 m2info = (struct matroxfb_dh_fb_info*)kmalloc(sizeof(*m2info), GFP_KERNEL);
700 if (!m2info) {
701 printk(KERN_ERR "matroxfb_crtc2: Not enough memory for CRTC2 control structs\n");
702 return NULL;
703 }
704 memset(m2info, 0, sizeof(*m2info));
705 m2info->primary_dev = MINFO;
706 if (matroxfb_dh_registerfb(m2info)) {
707 kfree(m2info);
708 printk(KERN_ERR "matroxfb_crtc2: CRTC2 framebuffer failed to register\n");
709 return NULL;
710 }
711 return m2info;
712 }
713
714 static void matroxfb_crtc2_remove(struct matrox_fb_info* minfo, void* crtc2) {
715 matroxfb_dh_deregisterfb(crtc2);
716 kfree(crtc2);
717 }
718
719 static struct matroxfb_driver crtc2 = {
720 .name = "Matrox G400 CRTC2",
721 .probe = matroxfb_crtc2_probe,
722 .remove = matroxfb_crtc2_remove };
723
724 static int matroxfb_crtc2_init(void) {
725 if (fb_get_options("matrox_crtc2fb", NULL))
726 return -ENODEV;
727
728 matroxfb_register_driver(&crtc2);
729 return 0;
730 }
731
732 static void matroxfb_crtc2_exit(void) {
733 matroxfb_unregister_driver(&crtc2);
734 }
735
736 MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>");
737 MODULE_DESCRIPTION("Matrox G400 CRTC2 driver");
738 MODULE_LICENSE("GPL");
739 module_init(matroxfb_crtc2_init);
740 module_exit(matroxfb_crtc2_exit);
741 /* we do not have __setup() yet */
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