matroxfb: fix regression with uninitalized fb_info->mm_lock mutex (second head)
[linux-2.6.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 <linux/uaccess.h>
19
20 /* **************************************************** */
21
22 static int mem = 8192;
23
24 module_param(mem, int, 0);
25 MODULE_PARM_DESC(mem, "Memory size reserved for dualhead (default=8MB)");
26
27 /* **************************************************** */
28
29 static int matroxfb_dh_setcolreg(unsigned regno, unsigned red, unsigned green,
30                 unsigned blue, unsigned transp, struct fb_info* info) {
31         u_int32_t col;
32 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
33
34         if (regno >= 16)
35                 return 1;
36         if (m2info->fbcon.var.grayscale) {
37                 /* gray = 0.30*R + 0.59*G + 0.11*B */
38                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
39         }
40         red = CNVT_TOHW(red, m2info->fbcon.var.red.length);
41         green = CNVT_TOHW(green, m2info->fbcon.var.green.length);
42         blue = CNVT_TOHW(blue, m2info->fbcon.var.blue.length);
43         transp = CNVT_TOHW(transp, m2info->fbcon.var.transp.length);
44
45         col = (red << m2info->fbcon.var.red.offset)     |
46               (green << m2info->fbcon.var.green.offset) |
47               (blue << m2info->fbcon.var.blue.offset)   |
48               (transp << m2info->fbcon.var.transp.offset);
49
50         switch (m2info->fbcon.var.bits_per_pixel) {
51                 case 16:
52                         m2info->cmap[regno] = col | (col << 16);
53                         break;
54                 case 32:
55                         m2info->cmap[regno] = col;
56                         break;
57         }
58         return 0;
59 #undef m2info
60 }
61
62 static void matroxfb_dh_restore(struct matroxfb_dh_fb_info* m2info,
63                 struct my_timming* mt,
64                 int mode,
65                 unsigned int pos) {
66         u_int32_t tmp;
67         u_int32_t datactl;
68         MINFO_FROM(m2info->primary_dev);
69
70         switch (mode) {
71                 case 15:
72                         tmp = 0x00200000;
73                         break;
74                 case 16:
75                         tmp = 0x00400000;
76                         break;
77 /*              case 32: */
78                 default:
79                         tmp = 0x00800000;
80                         break;
81         }
82         tmp |= 0x00000001;      /* enable CRTC2 */
83         datactl = 0;
84         if (ACCESS_FBINFO(outputs[1]).src == MATROXFB_SRC_CRTC2) {
85                 if (ACCESS_FBINFO(devflags.g450dac)) {
86                         tmp |= 0x00000006; /* source from secondary pixel PLL */
87                         /* no vidrst when in monitor mode */
88                         if (ACCESS_FBINFO(outputs[1]).mode != MATROXFB_OUTPUT_MODE_MONITOR) {
89                                 tmp |=  0xC0001000; /* Enable H/V vidrst */
90                         }
91                 } else {
92                         tmp |= 0x00000002; /* source from VDOCLK */
93                         tmp |= 0xC0000000; /* enable vvidrst & hvidrst */
94                         /* MGA TVO is our clock source */
95                 }
96         } else if (ACCESS_FBINFO(outputs[0]).src == MATROXFB_SRC_CRTC2) {
97                 tmp |= 0x00000004; /* source from pixclock */
98                 /* PIXPLL is our clock source */
99         }
100         if (ACCESS_FBINFO(outputs[0]).src == MATROXFB_SRC_CRTC2) {
101                 tmp |= 0x00100000;      /* connect CRTC2 to DAC */
102         }
103         if (mt->interlaced) {
104                 tmp |= 0x02000000;      /* interlaced, second field is bigger, as G450 apparently ignores it */
105                 mt->VDisplay >>= 1;
106                 mt->VSyncStart >>= 1;
107                 mt->VSyncEnd >>= 1;
108                 mt->VTotal >>= 1;
109         }
110         if ((mt->HTotal & 7) == 2) {
111                 datactl |= 0x00000010;
112                 mt->HTotal &= ~7;
113         }
114         tmp |= 0x10000000;      /* 0x10000000 is VIDRST polarity */
115         mga_outl(0x3C14, ((mt->HDisplay - 8) << 16) | (mt->HTotal - 8));
116         mga_outl(0x3C18, ((mt->HSyncEnd - 8) << 16) | (mt->HSyncStart - 8));
117         mga_outl(0x3C1C, ((mt->VDisplay - 1) << 16) | (mt->VTotal - 1));
118         mga_outl(0x3C20, ((mt->VSyncEnd - 1) << 16) | (mt->VSyncStart - 1));
119         mga_outl(0x3C24, ((mt->VSyncStart) << 16) | (mt->HSyncStart));  /* preload */
120         {
121                 u_int32_t linelen = m2info->fbcon.var.xres_virtual * (m2info->fbcon.var.bits_per_pixel >> 3);
122                 if (tmp & 0x02000000) {
123                         /* field #0 is smaller, so... */
124                         mga_outl(0x3C2C, pos);                  /* field #1 vmemory start */
125                         mga_outl(0x3C28, pos + linelen);        /* field #0 vmemory start */
126                         linelen <<= 1;
127                         m2info->interlaced = 1;
128                 } else {
129                         mga_outl(0x3C28, pos);          /* vmemory start */
130                         m2info->interlaced = 0;
131                 }
132                 mga_outl(0x3C40, linelen);
133         }
134         mga_outl(0x3C4C, datactl);      /* data control */
135         if (tmp & 0x02000000) {
136                 int i;
137
138                 mga_outl(0x3C10, tmp & ~0x02000000);
139                 for (i = 0; i < 2; i++) {
140                         unsigned int nl;
141                         unsigned int lastl = 0;
142
143                         while ((nl = mga_inl(0x3C48) & 0xFFF) >= lastl) {
144                                 lastl = nl;
145                         }
146                 }
147         }
148         mga_outl(0x3C10, tmp);
149         ACCESS_FBINFO(hw).crtc2.ctl = tmp;
150
151         tmp = mt->VDisplay << 16;       /* line compare */
152         if (mt->sync & FB_SYNC_HOR_HIGH_ACT)
153                 tmp |= 0x00000100;
154         if (mt->sync & FB_SYNC_VERT_HIGH_ACT)
155                 tmp |= 0x00000200;
156         mga_outl(0x3C44, tmp);
157 }
158
159 static void matroxfb_dh_disable(struct matroxfb_dh_fb_info* m2info) {
160         MINFO_FROM(m2info->primary_dev);
161
162         mga_outl(0x3C10, 0x00000004);   /* disable CRTC2, CRTC1->DAC1, PLL as clock source */
163         ACCESS_FBINFO(hw).crtc2.ctl = 0x00000004;
164 }
165
166 static void matroxfb_dh_pan_var(struct matroxfb_dh_fb_info* m2info,
167                 struct fb_var_screeninfo* var) {
168         unsigned int pos;
169         unsigned int linelen;
170         unsigned int pixelsize;
171         MINFO_FROM(m2info->primary_dev);
172
173         m2info->fbcon.var.xoffset = var->xoffset;
174         m2info->fbcon.var.yoffset = var->yoffset;
175         pixelsize = m2info->fbcon.var.bits_per_pixel >> 3;
176         linelen = m2info->fbcon.var.xres_virtual * pixelsize;
177         pos = m2info->fbcon.var.yoffset * linelen + m2info->fbcon.var.xoffset * pixelsize;
178         pos += m2info->video.offbase;
179         if (m2info->interlaced) {
180                 mga_outl(0x3C2C, pos);
181                 mga_outl(0x3C28, pos + linelen);
182         } else {
183                 mga_outl(0x3C28, pos);
184         }
185 }
186
187 static int matroxfb_dh_decode_var(struct matroxfb_dh_fb_info* m2info,
188                 struct fb_var_screeninfo* var,
189                 int *visual,
190                 int *video_cmap_len,
191                 int *mode) {
192         unsigned int mask;
193         unsigned int memlen;
194         unsigned int vramlen;
195
196         switch (var->bits_per_pixel) {
197                 case 16:        mask = 0x1F;
198                                 break;
199                 case 32:        mask = 0x0F;
200                                 break;
201                 default:        return -EINVAL;
202         }
203         vramlen = m2info->video.len_usable;
204         if (var->yres_virtual < var->yres)
205                 var->yres_virtual = var->yres;
206         if (var->xres_virtual < var->xres)
207                 var->xres_virtual = var->xres;
208         var->xres_virtual = (var->xres_virtual + mask) & ~mask;
209         if (var->yres_virtual > 32767)
210                 return -EINVAL;
211         memlen = var->xres_virtual * var->yres_virtual * (var->bits_per_pixel >> 3);
212         if (memlen > vramlen)
213                 return -EINVAL;
214         if (var->xoffset + var->xres > var->xres_virtual)
215                 var->xoffset = var->xres_virtual - var->xres;
216         if (var->yoffset + var->yres > var->yres_virtual)
217                 var->yoffset = var->yres_virtual - var->yres;
218
219         var->xres &= ~7;
220         var->left_margin &= ~7;
221         var->right_margin &= ~7;
222         var->hsync_len &= ~7;
223
224         *mode = var->bits_per_pixel;
225         if (var->bits_per_pixel == 16) {
226                 if (var->green.length == 5) {
227                         var->red.offset = 10;
228                         var->red.length = 5;
229                         var->green.offset = 5;
230                         var->green.length = 5;
231                         var->blue.offset = 0;
232                         var->blue.length = 5;
233                         var->transp.offset = 15;
234                         var->transp.length = 1;
235                         *mode = 15;
236                 } else {
237                         var->red.offset = 11;
238                         var->red.length = 5;
239                         var->green.offset = 5;
240                         var->green.length = 6;
241                         var->blue.offset = 0;
242                         var->blue.length = 5;
243                         var->transp.offset = 0;
244                         var->transp.length = 0;
245                 }
246         } else {
247                         var->red.offset = 16;
248                         var->red.length = 8;
249                         var->green.offset = 8;
250                         var->green.length = 8;
251                         var->blue.offset = 0;
252                         var->blue.length = 8;
253                         var->transp.offset = 24;
254                         var->transp.length = 8;
255         }
256         *visual = FB_VISUAL_TRUECOLOR;
257         *video_cmap_len = 16;
258         return 0;
259 }
260
261 static int matroxfb_dh_open(struct fb_info* info, int user) {
262 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
263         MINFO_FROM(m2info->primary_dev);
264
265         if (MINFO) {
266                 int err;
267
268                 if (ACCESS_FBINFO(dead)) {
269                         return -ENXIO;
270                 }
271                 err = ACCESS_FBINFO(fbops).fb_open(&ACCESS_FBINFO(fbcon), user);
272                 if (err) {
273                         return err;
274                 }
275         }
276         return 0;
277 #undef m2info
278 }
279
280 static int matroxfb_dh_release(struct fb_info* info, int user) {
281 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
282         int err = 0;
283         MINFO_FROM(m2info->primary_dev);
284
285         if (MINFO) {
286                 err = ACCESS_FBINFO(fbops).fb_release(&ACCESS_FBINFO(fbcon), user);
287         }
288         return err;
289 #undef m2info
290 }
291
292 /*
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         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         }
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         MINFO_FROM(m2info->primary_dev);
403
404         matroxfb_enable_irq(PMINFO 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, &ACCESS_FBINFO(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 = ACCESS_FBINFO(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         MINFO_FROM(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(PMINFO 1);
453                         }
454                 case MATROXFB_SET_OUTPUT_MODE:
455                 case MATROXFB_GET_OUTPUT_MODE:
456                 case MATROXFB_GET_ALL_OUTPUTS:
457                         {
458                                 return ACCESS_FBINFO(fbcon.fbops)->fb_ioctl(&ACCESS_FBINFO(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 (!ACCESS_FBINFO(outputs[out]).output)
473                                                         return -ENXIO;
474                                                 switch (ACCESS_FBINFO(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 (ACCESS_FBINFO(devflags.panellink)) {
484                                         if (tmp & MATROXFB_OUTPUT_CONN_DFP)
485                                                 return -EINVAL;
486                                         if ((ACCESS_FBINFO(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 (ACCESS_FBINFO(outputs[out]).src != MATROXFB_SRC_CRTC2) {
493                                                         changes = 1;
494                                                         ACCESS_FBINFO(outputs[out]).src = MATROXFB_SRC_CRTC2;
495                                                 }
496                                         } else if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2) {
497                                                 changes = 1;
498                                                 ACCESS_FBINFO(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 (ACCESS_FBINFO(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 (ACCESS_FBINFO(outputs[out]).output) {
527                                                 switch (ACCESS_FBINFO(outputs[out]).src) {
528                                                         case MATROXFB_SRC_NONE:
529                                                         case MATROXFB_SRC_CRTC2:
530                                                                 tmp |= 1 << out;
531                                                                 break;
532                                                 }
533                                         }
534                                 }
535                                 if (ACCESS_FBINFO(devflags.panellink)) {
536                                         tmp &= ~MATROXFB_OUTPUT_CONN_DFP;
537                                         if (ACCESS_FBINFO(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(CPMINFO struct matroxfb_dh_fb_info* m2info) {
599 #define minfo (m2info->primary_dev)
600         void* oldcrtc2;
601
602         m2info->fbcon.fbops = &matroxfb_dh_ops;
603         m2info->fbcon.flags = FBINFO_FLAG_DEFAULT;
604         m2info->fbcon.flags |= FBINFO_HWACCEL_XPAN |
605                                FBINFO_HWACCEL_YPAN;
606         m2info->fbcon.pseudo_palette = m2info->cmap;
607         fb_alloc_cmap(&m2info->fbcon.cmap, 256, 1);
608
609         if (mem < 64)
610                 mem *= 1024;
611         if (mem < 64*1024)
612                 mem *= 1024;
613         mem &= ~0x00000FFF;     /* PAGE_MASK? */
614         if (ACCESS_FBINFO(video.len_usable) + mem <= ACCESS_FBINFO(video.len))
615                 m2info->video.offbase = ACCESS_FBINFO(video.len) - mem;
616         else if (ACCESS_FBINFO(video.len) < mem) {
617                 return -ENOMEM;
618         } else { /* check yres on first head... */
619                 m2info->video.borrowed = mem;
620                 ACCESS_FBINFO(video.len_usable) -= mem;
621                 m2info->video.offbase = ACCESS_FBINFO(video.len_usable);
622         }
623         m2info->video.base = ACCESS_FBINFO(video.base) + m2info->video.offbase;
624         m2info->video.len = m2info->video.len_usable = m2info->video.len_maximum = mem;
625         m2info->video.vbase.vaddr = vaddr_va(ACCESS_FBINFO(video.vbase)) + m2info->video.offbase;
626         m2info->mmio.base = ACCESS_FBINFO(mmio.base);
627         m2info->mmio.vbase = ACCESS_FBINFO(mmio.vbase);
628         m2info->mmio.len = ACCESS_FBINFO(mmio.len);
629
630         matroxfb_dh_init_fix(m2info);
631         if (register_framebuffer(&m2info->fbcon)) {
632                 return -ENXIO;
633         }
634         if (!m2info->initialized)
635                 fb_set_var(&m2info->fbcon, &matroxfb_dh_defined);
636         down_write(&ACCESS_FBINFO(crtc2.lock));
637         oldcrtc2 = ACCESS_FBINFO(crtc2.info);
638         ACCESS_FBINFO(crtc2.info) = m2info;
639         up_write(&ACCESS_FBINFO(crtc2.lock));
640         if (oldcrtc2) {
641                 printk(KERN_ERR "matroxfb_crtc2: Internal consistency check failed: crtc2 already present: %p\n",
642                         oldcrtc2);
643         }
644         return 0;
645 #undef minfo
646 }
647
648 /* ************************** */
649
650 static int matroxfb_dh_registerfb(struct matroxfb_dh_fb_info* m2info) {
651 #define minfo (m2info->primary_dev)
652         if (matroxfb_dh_regit(PMINFO m2info)) {
653                 printk(KERN_ERR "matroxfb_crtc2: secondary head failed to register\n");
654                 return -1;
655         }
656         printk(KERN_INFO "matroxfb_crtc2: secondary head of fb%u was registered as fb%u\n",
657                 ACCESS_FBINFO(fbcon.node), m2info->fbcon.node);
658         m2info->fbcon_registered = 1;
659         return 0;
660 #undef minfo
661 }
662
663 static void matroxfb_dh_deregisterfb(struct matroxfb_dh_fb_info* m2info) {
664 #define minfo (m2info->primary_dev)
665         if (m2info->fbcon_registered) {
666                 int id;
667                 struct matroxfb_dh_fb_info* crtc2;
668
669                 down_write(&ACCESS_FBINFO(crtc2.lock));
670                 crtc2 = ACCESS_FBINFO(crtc2.info);
671                 if (crtc2 == m2info)
672                         ACCESS_FBINFO(crtc2.info) = NULL;
673                 up_write(&ACCESS_FBINFO(crtc2.lock));
674                 if (crtc2 != m2info) {
675                         printk(KERN_ERR "matroxfb_crtc2: Internal consistency check failed: crtc2 mismatch at unload: %p != %p\n",
676                                 crtc2, m2info);
677                         printk(KERN_ERR "matroxfb_crtc2: Expect kernel crash after module unload.\n");
678                         return;
679                 }
680                 id = m2info->fbcon.node;
681                 unregister_framebuffer(&m2info->fbcon);
682                 /* return memory back to primary head */
683                 ACCESS_FBINFO(video.len_usable) += m2info->video.borrowed;
684                 printk(KERN_INFO "matroxfb_crtc2: fb%u unregistered\n", id);
685                 m2info->fbcon_registered = 0;
686         }
687 #undef minfo
688 }
689
690 static void* matroxfb_crtc2_probe(struct matrox_fb_info* minfo) {
691         struct matroxfb_dh_fb_info* m2info;
692
693         /* hardware is CRTC2 incapable... */
694         if (!ACCESS_FBINFO(devflags.crtc2))
695                 return NULL;
696         m2info = kzalloc(sizeof(*m2info), GFP_KERNEL);
697         if (!m2info) {
698                 printk(KERN_ERR "matroxfb_crtc2: Not enough memory for CRTC2 control structs\n");
699                 return NULL;
700         }
701         m2info->primary_dev = MINFO;
702         if (matroxfb_dh_registerfb(m2info)) {
703                 kfree(m2info);
704                 printk(KERN_ERR "matroxfb_crtc2: CRTC2 framebuffer failed to register\n");
705                 return NULL;
706         }
707         return m2info;
708 }
709
710 static void matroxfb_crtc2_remove(struct matrox_fb_info* minfo, void* crtc2) {
711         matroxfb_dh_deregisterfb(crtc2);
712         kfree(crtc2);
713 }
714
715 static struct matroxfb_driver crtc2 = {
716                 .name =         "Matrox G400 CRTC2",
717                 .probe =        matroxfb_crtc2_probe,
718                 .remove =       matroxfb_crtc2_remove };
719
720 static int matroxfb_crtc2_init(void) {
721         if (fb_get_options("matrox_crtc2fb", NULL))
722                 return -ENODEV;
723
724         matroxfb_register_driver(&crtc2);
725         return 0;
726 }
727
728 static void matroxfb_crtc2_exit(void) {
729         matroxfb_unregister_driver(&crtc2);
730 }
731
732 MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>");
733 MODULE_DESCRIPTION("Matrox G400 CRTC2 driver");
734 MODULE_LICENSE("GPL");
735 module_init(matroxfb_crtc2_init);
736 module_exit(matroxfb_crtc2_exit);
737 /* we do not have __setup() yet */