Merge master.kernel.org:/pub/scm/linux/kernel/git/bunk/trivial
[linux-2.6] / 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 };
580
581 static struct fb_var_screeninfo matroxfb_dh_defined = {
582                 640,480,640,480,/* W,H, virtual W,H */
583                 0,0,            /* offset */
584                 32,             /* depth */
585                 0,              /* gray */
586                 {0,0,0},        /* R */
587                 {0,0,0},        /* G */
588                 {0,0,0},        /* B */
589                 {0,0,0},        /* alpha */
590                 0,              /* nonstd */
591                 FB_ACTIVATE_NOW,
592                 -1,-1,          /* display size */
593                 0,              /* accel flags */
594                 39721L,48L,16L,33L,10L,
595                 96L,2,0,        /* no sync info */
596                 FB_VMODE_NONINTERLACED,
597                 0, {0,0,0,0,0}
598 };
599
600 static int matroxfb_dh_regit(CPMINFO struct matroxfb_dh_fb_info* m2info) {
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 (ACCESS_FBINFO(video.len_usable) + mem <= ACCESS_FBINFO(video.len))
617                 m2info->video.offbase = ACCESS_FBINFO(video.len) - mem;
618         else if (ACCESS_FBINFO(video.len) < mem) {
619                 return -ENOMEM;
620         } else { /* check yres on first head... */
621                 m2info->video.borrowed = mem;
622                 ACCESS_FBINFO(video.len_usable) -= mem;
623                 m2info->video.offbase = ACCESS_FBINFO(video.len_usable);
624         }
625         m2info->video.base = ACCESS_FBINFO(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(ACCESS_FBINFO(video.vbase)) + m2info->video.offbase;
628         m2info->mmio.base = ACCESS_FBINFO(mmio.base);
629         m2info->mmio.vbase = ACCESS_FBINFO(mmio.vbase);
630         m2info->mmio.len = ACCESS_FBINFO(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(&ACCESS_FBINFO(crtc2.lock));
639         oldcrtc2 = ACCESS_FBINFO(crtc2.info);
640         ACCESS_FBINFO(crtc2.info) = m2info;
641         up_write(&ACCESS_FBINFO(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(PMINFO 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                 ACCESS_FBINFO(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(&ACCESS_FBINFO(crtc2.lock));
672                 crtc2 = ACCESS_FBINFO(crtc2.info);
673                 if (crtc2 == m2info)
674                         ACCESS_FBINFO(crtc2.info) = NULL;
675                 up_write(&ACCESS_FBINFO(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                 ACCESS_FBINFO(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 (!ACCESS_FBINFO(devflags.crtc2))
697                 return NULL;
698         m2info = (struct matroxfb_dh_fb_info*)kmalloc(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         memset(m2info, 0, sizeof(*m2info));
704         m2info->primary_dev = MINFO;
705         if (matroxfb_dh_registerfb(m2info)) {
706                 kfree(m2info);
707                 printk(KERN_ERR "matroxfb_crtc2: CRTC2 framebuffer failed to register\n");
708                 return NULL;
709         }
710         return m2info;
711 }
712
713 static void matroxfb_crtc2_remove(struct matrox_fb_info* minfo, void* crtc2) {
714         matroxfb_dh_deregisterfb(crtc2);
715         kfree(crtc2);
716 }
717
718 static struct matroxfb_driver crtc2 = {
719                 .name =         "Matrox G400 CRTC2",
720                 .probe =        matroxfb_crtc2_probe,
721                 .remove =       matroxfb_crtc2_remove };
722
723 static int matroxfb_crtc2_init(void) {
724         if (fb_get_options("matrox_crtc2fb", NULL))
725                 return -ENODEV;
726
727         matroxfb_register_driver(&crtc2);
728         return 0;
729 }
730
731 static void matroxfb_crtc2_exit(void) {
732         matroxfb_unregister_driver(&crtc2);
733 }
734
735 MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>");
736 MODULE_DESCRIPTION("Matrox G400 CRTC2 driver");
737 MODULE_LICENSE("GPL");
738 module_init(matroxfb_crtc2_init);
739 module_exit(matroxfb_crtc2_exit);
740 /* we do not have __setup() yet */