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Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / video / fbdev / matrox / matroxfb_crtc2.c
blob7655afa3fd500b672ff1dae94b59472e5e75528e
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 *
4 * Hardware accelerated Matrox Millennium I, II, Mystique, G100, G200, G400 and G450.
5 *
6 * (c) 1998-2002 Petr Vandrovec <vandrove@vc.cvut.cz>
7 *
8 * Portions Copyright (c) 2001 Matrox Graphics Inc.
9 *
10 * Version: 1.65 2002/08/14
11 *
12 */
13
14 #include "matroxfb_maven.h"
15 #include "matroxfb_crtc2.h"
16 #include "matroxfb_misc.h"
17 #include "matroxfb_DAC1064.h"
18 #include <linux/matroxfb.h>
19 #include <linux/slab.h>
20 #include <linux/uaccess.h>
21
22 /* **************************************************** */
23
24 static int mem = 8192;
25
26 module_param(mem, int, 0);
27 MODULE_PARM_DESC(mem, "Memory size reserved for dualhead (default=8MB)");
28
29 /* **************************************************** */
30
31 static int matroxfb_dh_setcolreg(unsigned regno, unsigned red, unsigned green,
32 unsigned blue, unsigned transp, struct fb_info* info) {
33 u_int32_t col;
34 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
35
36 if (regno >= 16)
37 return 1;
38 if (m2info->fbcon.var.grayscale) {
39 /* gray = 0.30*R + 0.59*G + 0.11*B */
40 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
41 }
42 red = CNVT_TOHW(red, m2info->fbcon.var.red.length);
43 green = CNVT_TOHW(green, m2info->fbcon.var.green.length);
44 blue = CNVT_TOHW(blue, m2info->fbcon.var.blue.length);
45 transp = CNVT_TOHW(transp, m2info->fbcon.var.transp.length);
46
47 col = (red << m2info->fbcon.var.red.offset) |
48 (green << m2info->fbcon.var.green.offset) |
49 (blue << m2info->fbcon.var.blue.offset) |
50 (transp << m2info->fbcon.var.transp.offset);
51
52 switch (m2info->fbcon.var.bits_per_pixel) {
53 case 16:
54 m2info->cmap[regno] = col | (col << 16);
55 break;
56 case 32:
57 m2info->cmap[regno] = col;
58 break;
59 }
60 return 0;
61 #undef m2info
62 }
63
64 static void matroxfb_dh_restore(struct matroxfb_dh_fb_info* m2info,
65 struct my_timming* mt,
66 int mode,
67 unsigned int pos) {
68 u_int32_t tmp;
69 u_int32_t datactl;
70 struct matrox_fb_info *minfo = m2info->primary_dev;
71
72 switch (mode) {
73 case 15:
74 tmp = 0x00200000;
75 break;
76 case 16:
77 tmp = 0x00400000;
78 break;
79 /* case 32: */
80 default:
81 tmp = 0x00800000;
82 break;
83 }
84 tmp |= 0x00000001; /* enable CRTC2 */
85 datactl = 0;
86 if (minfo->outputs[1].src == MATROXFB_SRC_CRTC2) {
87 if (minfo->devflags.g450dac) {
88 tmp |= 0x00000006; /* source from secondary pixel PLL */
89 /* no vidrst when in monitor mode */
90 if (minfo->outputs[1].mode != MATROXFB_OUTPUT_MODE_MONITOR) {
91 tmp |= 0xC0001000; /* Enable H/V vidrst */
92 }
93 } else {
94 tmp |= 0x00000002; /* source from VDOCLK */
95 tmp |= 0xC0000000; /* enable vvidrst & hvidrst */
96 /* MGA TVO is our clock source */
97 }
98 } else if (minfo->outputs[0].src == MATROXFB_SRC_CRTC2) {
99 tmp |= 0x00000004; /* source from pixclock */
100 /* PIXPLL is our clock source */
101 }
102 if (minfo->outputs[0].src == MATROXFB_SRC_CRTC2) {
103 tmp |= 0x00100000; /* connect CRTC2 to DAC */
104 }
105 if (mt->interlaced) {
106 tmp |= 0x02000000; /* interlaced, second field is bigger, as G450 apparently ignores it */
107 mt->VDisplay >>= 1;
108 mt->VSyncStart >>= 1;
109 mt->VSyncEnd >>= 1;
110 mt->VTotal >>= 1;
111 }
112 if ((mt->HTotal & 7) == 2) {
113 datactl |= 0x00000010;
114 mt->HTotal &= ~7;
115 }
116 tmp |= 0x10000000; /* 0x10000000 is VIDRST polarity */
117 mga_outl(0x3C14, ((mt->HDisplay - 8) << 16) | (mt->HTotal - 8));
118 mga_outl(0x3C18, ((mt->HSyncEnd - 8) << 16) | (mt->HSyncStart - 8));
119 mga_outl(0x3C1C, ((mt->VDisplay - 1) << 16) | (mt->VTotal - 1));
120 mga_outl(0x3C20, ((mt->VSyncEnd - 1) << 16) | (mt->VSyncStart - 1));
121 mga_outl(0x3C24, ((mt->VSyncStart) << 16) | (mt->HSyncStart)); /* preload */
122 {
123 u_int32_t linelen = m2info->fbcon.var.xres_virtual * (m2info->fbcon.var.bits_per_pixel >> 3);
124 if (tmp & 0x02000000) {
125 /* field #0 is smaller, so... */
126 mga_outl(0x3C2C, pos); /* field #1 vmemory start */
127 mga_outl(0x3C28, pos + linelen); /* field #0 vmemory start */
128 linelen <<= 1;
129 m2info->interlaced = 1;
130 } else {
131 mga_outl(0x3C28, pos); /* vmemory start */
132 m2info->interlaced = 0;
133 }
134 mga_outl(0x3C40, linelen);
135 }
136 mga_outl(0x3C4C, datactl); /* data control */
137 if (tmp & 0x02000000) {
138 int i;
139
140 mga_outl(0x3C10, tmp & ~0x02000000);
141 for (i = 0; i < 2; i++) {
142 unsigned int nl;
143 unsigned int lastl = 0;
144
145 while ((nl = mga_inl(0x3C48) & 0xFFF) >= lastl) {
146 lastl = nl;
147 }
148 }
149 }
150 mga_outl(0x3C10, tmp);
151 minfo->hw.crtc2.ctl = tmp;
152
153 tmp = mt->VDisplay << 16; /* line compare */
154 if (mt->sync & FB_SYNC_HOR_HIGH_ACT)
155 tmp |= 0x00000100;
156 if (mt->sync & FB_SYNC_VERT_HIGH_ACT)
157 tmp |= 0x00000200;
158 mga_outl(0x3C44, tmp);
159 }
160
161 static void matroxfb_dh_disable(struct matroxfb_dh_fb_info* m2info) {
162 struct matrox_fb_info *minfo = m2info->primary_dev;
163
164 mga_outl(0x3C10, 0x00000004); /* disable CRTC2, CRTC1->DAC1, PLL as clock source */
165 minfo->hw.crtc2.ctl = 0x00000004;
166 }
167
168 static void matroxfb_dh_pan_var(struct matroxfb_dh_fb_info* m2info,
169 struct fb_var_screeninfo* var) {
170 unsigned int pos;
171 unsigned int linelen;
172 unsigned int pixelsize;
173 struct matrox_fb_info *minfo = m2info->primary_dev;
174
175 m2info->fbcon.var.xoffset = var->xoffset;
176 m2info->fbcon.var.yoffset = var->yoffset;
177 pixelsize = m2info->fbcon.var.bits_per_pixel >> 3;
178 linelen = m2info->fbcon.var.xres_virtual * pixelsize;
179 pos = m2info->fbcon.var.yoffset * linelen + m2info->fbcon.var.xoffset * pixelsize;
180 pos += m2info->video.offbase;
181 if (m2info->interlaced) {
182 mga_outl(0x3C2C, pos);
183 mga_outl(0x3C28, pos + linelen);
184 } else {
185 mga_outl(0x3C28, pos);
186 }
187 }
188
189 static int matroxfb_dh_decode_var(struct matroxfb_dh_fb_info* m2info,
190 struct fb_var_screeninfo* var,
191 int *visual,
192 int *video_cmap_len,
193 int *mode) {
194 unsigned int mask;
195 unsigned int memlen;
196 unsigned int vramlen;
197
198 switch (var->bits_per_pixel) {
199 case 16: mask = 0x1F;
200 break;
201 case 32: mask = 0x0F;
202 break;
203 default: return -EINVAL;
204 }
205 vramlen = m2info->video.len_usable;
206 if (var->yres_virtual < var->yres)
207 var->yres_virtual = var->yres;
208 if (var->xres_virtual < var->xres)
209 var->xres_virtual = var->xres;
210 var->xres_virtual = (var->xres_virtual + mask) & ~mask;
211 if (var->yres_virtual > 32767)
212 return -EINVAL;
213 memlen = var->xres_virtual * var->yres_virtual * (var->bits_per_pixel >> 3);
214 if (memlen > vramlen)
215 return -EINVAL;
216 if (var->xoffset + var->xres > var->xres_virtual)
217 var->xoffset = var->xres_virtual - var->xres;
218 if (var->yoffset + var->yres > var->yres_virtual)
219 var->yoffset = var->yres_virtual - var->yres;
220
221 var->xres &= ~7;
222 var->left_margin &= ~7;
223 var->right_margin &= ~7;
224 var->hsync_len &= ~7;
225
226 *mode = var->bits_per_pixel;
227 if (var->bits_per_pixel == 16) {
228 if (var->green.length == 5) {
229 var->red.offset = 10;
230 var->red.length = 5;
231 var->green.offset = 5;
232 var->green.length = 5;
233 var->blue.offset = 0;
234 var->blue.length = 5;
235 var->transp.offset = 15;
236 var->transp.length = 1;
237 *mode = 15;
238 } else {
239 var->red.offset = 11;
240 var->red.length = 5;
241 var->green.offset = 5;
242 var->green.length = 6;
243 var->blue.offset = 0;
244 var->blue.length = 5;
245 var->transp.offset = 0;
246 var->transp.length = 0;
247 }
248 } else {
249 var->red.offset = 16;
250 var->red.length = 8;
251 var->green.offset = 8;
252 var->green.length = 8;
253 var->blue.offset = 0;
254 var->blue.length = 8;
255 var->transp.offset = 24;
256 var->transp.length = 8;
257 }
258 *visual = FB_VISUAL_TRUECOLOR;
259 *video_cmap_len = 16;
260 return 0;
261 }
262
263 static int matroxfb_dh_open(struct fb_info* info, int user) {
264 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
265 struct matrox_fb_info *minfo = m2info->primary_dev;
266
267 if (minfo) {
268 int err;
269
270 if (minfo->dead) {
271 return -ENXIO;
272 }
273 err = minfo->fbops.fb_open(&minfo->fbcon, user);
274 if (err) {
275 return err;
276 }
277 }
278 return 0;
279 #undef m2info
280 }
281
282 static int matroxfb_dh_release(struct fb_info* info, int user) {
283 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
284 int err = 0;
285 struct matrox_fb_info *minfo = m2info->primary_dev;
286
287 if (minfo) {
288 err = minfo->fbops.fb_release(&minfo->fbcon, user);
289 }
290 return err;
291 #undef m2info
292 }
293
294 /*
295 * This function is called before the register_framebuffer so
296 * no locking is needed.
297 */
298 static void matroxfb_dh_init_fix(struct matroxfb_dh_fb_info *m2info)
299 {
300 struct fb_fix_screeninfo *fix = &m2info->fbcon.fix;
301
302 strcpy(fix->id, "MATROX DH");
303
304 fix->smem_start = m2info->video.base;
305 fix->smem_len = m2info->video.len_usable;
306 fix->ypanstep = 1;
307 fix->ywrapstep = 0;
308 fix->xpanstep = 8; /* TBD */
309 fix->mmio_start = m2info->mmio.base;
310 fix->mmio_len = m2info->mmio.len;
311 fix->accel = 0; /* no accel... */
312 }
313
314 static int matroxfb_dh_check_var(struct fb_var_screeninfo* var, struct fb_info* info) {
315 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
316 int visual;
317 int cmap_len;
318 int mode;
319
320 return matroxfb_dh_decode_var(m2info, var, &visual, &cmap_len, &mode);
321 #undef m2info
322 }
323
324 static int matroxfb_dh_set_par(struct fb_info* info) {
325 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
326 int visual;
327 int cmap_len;
328 int mode;
329 int err;
330 struct fb_var_screeninfo* var = &info->var;
331 struct matrox_fb_info *minfo = m2info->primary_dev;
332
333 if ((err = matroxfb_dh_decode_var(m2info, var, &visual, &cmap_len, &mode)) != 0)
334 return err;
335 /* cmap */
336 {
337 m2info->fbcon.screen_base = vaddr_va(m2info->video.vbase);
338 m2info->fbcon.fix.visual = visual;
339 m2info->fbcon.fix.type = FB_TYPE_PACKED_PIXELS;
340 m2info->fbcon.fix.type_aux = 0;
341 m2info->fbcon.fix.line_length = (var->xres_virtual * var->bits_per_pixel) >> 3;
342 }
343 {
344 struct my_timming mt;
345 unsigned int pos;
346 int out;
347 int cnt;
348
349 matroxfb_var2my(&m2info->fbcon.var, &mt);
350 mt.crtc = MATROXFB_SRC_CRTC2;
351 /* CRTC2 delay */
352 mt.delay = 34;
353
354 pos = (m2info->fbcon.var.yoffset * m2info->fbcon.var.xres_virtual + m2info->fbcon.var.xoffset) * m2info->fbcon.var.bits_per_pixel >> 3;
355 pos += m2info->video.offbase;
356 cnt = 0;
357 down_read(&minfo->altout.lock);
358 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
359 if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2) {
360 cnt++;
361 if (minfo->outputs[out].output->compute) {
362 minfo->outputs[out].output->compute(minfo->outputs[out].data, &mt);
363 }
364 }
365 }
366 minfo->crtc2.pixclock = mt.pixclock;
367 minfo->crtc2.mnp = mt.mnp;
368 up_read(&minfo->altout.lock);
369 if (cnt) {
370 matroxfb_dh_restore(m2info, &mt, mode, pos);
371 } else {
372 matroxfb_dh_disable(m2info);
373 }
374 DAC1064_global_init(minfo);
375 DAC1064_global_restore(minfo);
376 down_read(&minfo->altout.lock);
377 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
378 if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2 &&
379 minfo->outputs[out].output->program) {
380 minfo->outputs[out].output->program(minfo->outputs[out].data);
381 }
382 }
383 for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
384 if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2 &&
385 minfo->outputs[out].output->start) {
386 minfo->outputs[out].output->start(minfo->outputs[out].data);
387 }
388 }
389 up_read(&minfo->altout.lock);
390 }
391 m2info->initialized = 1;
392 return 0;
393 #undef m2info
394 }
395
396 static int matroxfb_dh_pan_display(struct fb_var_screeninfo* var, struct fb_info* info) {
397 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
398 matroxfb_dh_pan_var(m2info, var);
399 return 0;
400 #undef m2info
401 }
402
403 static int matroxfb_dh_get_vblank(const struct matroxfb_dh_fb_info* m2info, struct fb_vblank* vblank) {
404 struct matrox_fb_info *minfo = m2info->primary_dev;
405
406 matroxfb_enable_irq(minfo, 0);
407 memset(vblank, 0, sizeof(*vblank));
408 vblank->flags = FB_VBLANK_HAVE_VCOUNT | FB_VBLANK_HAVE_VBLANK;
409 /* mask out reserved bits + field number (odd/even) */
410 vblank->vcount = mga_inl(0x3C48) & 0x000007FF;
411 /* compatibility stuff */
412 if (vblank->vcount >= m2info->fbcon.var.yres)
413 vblank->flags |= FB_VBLANK_VBLANKING;
414 if (test_bit(0, &minfo->irq_flags)) {
415 vblank->flags |= FB_VBLANK_HAVE_COUNT;
416 /* Only one writer, aligned int value...
417 it should work without lock and without atomic_t */
418 vblank->count = minfo->crtc2.vsync.cnt;
419 }
420 return 0;
421 }
422
423 static int matroxfb_dh_ioctl(struct fb_info *info,
424 unsigned int cmd,
425 unsigned long arg)
426 {
427 #define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
428 struct matrox_fb_info *minfo = m2info->primary_dev;
429
430 DBG(__func__)
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(minfo, 1);
455 }
456 case MATROXFB_SET_OUTPUT_MODE:
457 case MATROXFB_GET_OUTPUT_MODE:
458 case MATROXFB_GET_ALL_OUTPUTS:
459 {
460 return minfo->fbcon.fbops->fb_ioctl(&minfo->fbcon, cmd, arg);
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 (!minfo->outputs[out].output)
475 return -ENXIO;
476 switch (minfo->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 (minfo->devflags.panellink) {
486 if (tmp & MATROXFB_OUTPUT_CONN_DFP)
487 return -EINVAL;
488 if ((minfo->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 (minfo->outputs[out].src != MATROXFB_SRC_CRTC2) {
495 changes = 1;
496 minfo->outputs[out].src = MATROXFB_SRC_CRTC2;
497 }
498 } else if (minfo->outputs[out].src == MATROXFB_SRC_CRTC2) {
499 changes = 1;
500 minfo->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 (minfo->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 (minfo->outputs[out].output) {
529 switch (minfo->outputs[out].src) {
530 case MATROXFB_SRC_NONE:
531 case MATROXFB_SRC_CRTC2:
532 tmp |= 1 << out;
533 break;
534 }
535 }
536 }
537 if (minfo->devflags.panellink) {
538 tmp &= ~MATROXFB_OUTPUT_CONN_DFP;
539 if (minfo->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 const 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 };
598
599 static int matroxfb_dh_regit(const struct matrox_fb_info *minfo,
600 struct matroxfb_dh_fb_info *m2info)
601 {
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 (minfo->video.len_usable + mem <= minfo->video.len)
618 m2info->video.offbase = minfo->video.len - mem;
619 else if (minfo->video.len < mem) {
620 return -ENOMEM;
621 } else { /* check yres on first head... */
622 m2info->video.borrowed = mem;
623 minfo->video.len_usable -= mem;
624 m2info->video.offbase = minfo->video.len_usable;
625 }
626 m2info->video.base = minfo->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(minfo->video.vbase) + m2info->video.offbase;
629 m2info->mmio.base = minfo->mmio.base;
630 m2info->mmio.vbase = minfo->mmio.vbase;
631 m2info->mmio.len = minfo->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(&minfo->crtc2.lock);
640 oldcrtc2 = minfo->crtc2.info;
641 minfo->crtc2.info = m2info;
642 up_write(&minfo->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(minfo, 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 minfo->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(&minfo->crtc2.lock);
673 crtc2 = minfo->crtc2.info;
674 if (crtc2 == m2info)
675 minfo->crtc2.info = NULL;
676 up_write(&minfo->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 minfo->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 (!minfo->devflags.crtc2)
698 return NULL;
699 m2info = kzalloc(sizeof(*m2info), GFP_KERNEL);
700 if (!m2info)
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 */
Linux with added FPC-III support