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vlan: fix bond/team enslave of vlan challenged slave/port
[linux-2.6/btrfs-unstable.git] / drivers / video / uvesafb.c
blob2f8f82d874a15995b375a7250d5eb259711d9a69
1 /*
2 * A framebuffer driver for VBE 2.0+ compliant video cards
3 *
4 * (c) 2007 Michal Januszewski <spock@gentoo.org>
5 * Loosely based upon the vesafb driver.
6 *
7 */
8 #include <linux/init.h>
9 #include <linux/module.h>
10 #include <linux/moduleparam.h>
11 #include <linux/skbuff.h>
12 #include <linux/timer.h>
13 #include <linux/completion.h>
14 #include <linux/connector.h>
15 #include <linux/random.h>
16 #include <linux/platform_device.h>
17 #include <linux/limits.h>
18 #include <linux/fb.h>
19 #include <linux/io.h>
20 #include <linux/mutex.h>
21 #include <linux/slab.h>
22 #include <video/edid.h>
23 #include <video/uvesafb.h>
24 #ifdef CONFIG_X86
25 #include <video/vga.h>
26 #endif
27 #ifdef CONFIG_MTRR
28 #include <asm/mtrr.h>
29 #endif
30 #include "edid.h"
31
32 static struct cb_id uvesafb_cn_id = {
33 .idx = CN_IDX_V86D,
34 .val = CN_VAL_V86D_UVESAFB
35 };
36 static char v86d_path[PATH_MAX] = "/sbin/v86d";
37 static char v86d_started; /* has v86d been started by uvesafb? */
38
39 static struct fb_fix_screeninfo uvesafb_fix __devinitdata = {
40 .id = "VESA VGA",
41 .type = FB_TYPE_PACKED_PIXELS,
42 .accel = FB_ACCEL_NONE,
43 .visual = FB_VISUAL_TRUECOLOR,
44 };
45
46 static int mtrr __devinitdata = 3; /* enable mtrr by default */
47 static bool blank = 1; /* enable blanking by default */
48 static int ypan = 1; /* 0: scroll, 1: ypan, 2: ywrap */
49 static bool pmi_setpal __devinitdata = true; /* use PMI for palette changes */
50 static bool nocrtc __devinitdata; /* ignore CRTC settings */
51 static bool noedid __devinitdata; /* don't try DDC transfers */
52 static int vram_remap __devinitdata; /* set amt. of memory to be used */
53 static int vram_total __devinitdata; /* set total amount of memory */
54 static u16 maxclk __devinitdata; /* maximum pixel clock */
55 static u16 maxvf __devinitdata; /* maximum vertical frequency */
56 static u16 maxhf __devinitdata; /* maximum horizontal frequency */
57 static u16 vbemode __devinitdata; /* force use of a specific VBE mode */
58 static char *mode_option __devinitdata;
59 static u8 dac_width = 6;
60
61 static struct uvesafb_ktask *uvfb_tasks[UVESAFB_TASKS_MAX];
62 static DEFINE_MUTEX(uvfb_lock);
63
64 /*
65 * A handler for replies from userspace.
66 *
67 * Make sure each message passes consistency checks and if it does,
68 * find the kernel part of the task struct, copy the registers and
69 * the buffer contents and then complete the task.
70 */
71 static void uvesafb_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp)
72 {
73 struct uvesafb_task *utask;
74 struct uvesafb_ktask *task;
75
76 if (!capable(CAP_SYS_ADMIN))
77 return;
78
79 if (msg->seq >= UVESAFB_TASKS_MAX)
80 return;
81
82 mutex_lock(&uvfb_lock);
83 task = uvfb_tasks[msg->seq];
84
85 if (!task || msg->ack != task->ack) {
86 mutex_unlock(&uvfb_lock);
87 return;
88 }
89
90 utask = (struct uvesafb_task *)msg->data;
91
92 /* Sanity checks for the buffer length. */
93 if (task->t.buf_len < utask->buf_len ||
94 utask->buf_len > msg->len - sizeof(*utask)) {
95 mutex_unlock(&uvfb_lock);
96 return;
97 }
98
99 uvfb_tasks[msg->seq] = NULL;
100 mutex_unlock(&uvfb_lock);
101
102 memcpy(&task->t, utask, sizeof(*utask));
103
104 if (task->t.buf_len && task->buf)
105 memcpy(task->buf, utask + 1, task->t.buf_len);
106
107 complete(task->done);
108 return;
109 }
110
111 static int uvesafb_helper_start(void)
112 {
113 char *envp[] = {
114 "HOME=/",
115 "PATH=/sbin:/bin",
116 NULL,
117 };
118
119 char *argv[] = {
120 v86d_path,
121 NULL,
122 };
123
124 return call_usermodehelper(v86d_path, argv, envp, UMH_WAIT_PROC);
125 }
126
127 /*
128 * Execute a uvesafb task.
129 *
130 * Returns 0 if the task is executed successfully.
131 *
132 * A message sent to the userspace consists of the uvesafb_task
133 * struct and (optionally) a buffer. The uvesafb_task struct is
134 * a simplified version of uvesafb_ktask (its kernel counterpart)
135 * containing only the register values, flags and the length of
136 * the buffer.
137 *
138 * Each message is assigned a sequence number (increased linearly)
139 * and a random ack number. The sequence number is used as a key
140 * for the uvfb_tasks array which holds pointers to uvesafb_ktask
141 * structs for all requests.
142 */
143 static int uvesafb_exec(struct uvesafb_ktask *task)
144 {
145 static int seq;
146 struct cn_msg *m;
147 int err;
148 int len = sizeof(task->t) + task->t.buf_len;
149
150 /*
151 * Check whether the message isn't longer than the maximum
152 * allowed by connector.
153 */
154 if (sizeof(*m) + len > CONNECTOR_MAX_MSG_SIZE) {
155 printk(KERN_WARNING "uvesafb: message too long (%d), "
156 "can't execute task\n", (int)(sizeof(*m) + len));
157 return -E2BIG;
158 }
159
160 m = kzalloc(sizeof(*m) + len, GFP_KERNEL);
161 if (!m)
162 return -ENOMEM;
163
164 init_completion(task->done);
165
166 memcpy(&m->id, &uvesafb_cn_id, sizeof(m->id));
167 m->seq = seq;
168 m->len = len;
169 m->ack = random32();
170
171 /* uvesafb_task structure */
172 memcpy(m + 1, &task->t, sizeof(task->t));
173
174 /* Buffer */
175 memcpy((u8 *)(m + 1) + sizeof(task->t), task->buf, task->t.buf_len);
176
177 /*
178 * Save the message ack number so that we can find the kernel
179 * part of this task when a reply is received from userspace.
180 */
181 task->ack = m->ack;
182
183 mutex_lock(&uvfb_lock);
184
185 /* If all slots are taken -- bail out. */
186 if (uvfb_tasks[seq]) {
187 mutex_unlock(&uvfb_lock);
188 err = -EBUSY;
189 goto out;
190 }
191
192 /* Save a pointer to the kernel part of the task struct. */
193 uvfb_tasks[seq] = task;
194 mutex_unlock(&uvfb_lock);
195
196 err = cn_netlink_send(m, 0, GFP_KERNEL);
197 if (err == -ESRCH) {
198 /*
199 * Try to start the userspace helper if sending
200 * the request failed the first time.
201 */
202 err = uvesafb_helper_start();
203 if (err) {
204 printk(KERN_ERR "uvesafb: failed to execute %s\n",
205 v86d_path);
206 printk(KERN_ERR "uvesafb: make sure that the v86d "
207 "helper is installed and executable\n");
208 } else {
209 v86d_started = 1;
210 err = cn_netlink_send(m, 0, gfp_any());
211 if (err == -ENOBUFS)
212 err = 0;
213 }
214 } else if (err == -ENOBUFS)
215 err = 0;
216
217 if (!err && !(task->t.flags & TF_EXIT))
218 err = !wait_for_completion_timeout(task->done,
219 msecs_to_jiffies(UVESAFB_TIMEOUT));
220
221 mutex_lock(&uvfb_lock);
222 uvfb_tasks[seq] = NULL;
223 mutex_unlock(&uvfb_lock);
224
225 seq++;
226 if (seq >= UVESAFB_TASKS_MAX)
227 seq = 0;
228 out:
229 kfree(m);
230 return err;
231 }
232
233 /*
234 * Free a uvesafb_ktask struct.
235 */
236 static void uvesafb_free(struct uvesafb_ktask *task)
237 {
238 if (task) {
239 if (task->done)
240 kfree(task->done);
241 kfree(task);
242 }
243 }
244
245 /*
246 * Prepare a uvesafb_ktask struct to be used again.
247 */
248 static void uvesafb_reset(struct uvesafb_ktask *task)
249 {
250 struct completion *cpl = task->done;
251
252 memset(task, 0, sizeof(*task));
253 task->done = cpl;
254 }
255
256 /*
257 * Allocate and prepare a uvesafb_ktask struct.
258 */
259 static struct uvesafb_ktask *uvesafb_prep(void)
260 {
261 struct uvesafb_ktask *task;
262
263 task = kzalloc(sizeof(*task), GFP_KERNEL);
264 if (task) {
265 task->done = kzalloc(sizeof(*task->done), GFP_KERNEL);
266 if (!task->done) {
267 kfree(task);
268 task = NULL;
269 }
270 }
271 return task;
272 }
273
274 static void uvesafb_setup_var(struct fb_var_screeninfo *var,
275 struct fb_info *info, struct vbe_mode_ib *mode)
276 {
277 struct uvesafb_par *par = info->par;
278
279 var->vmode = FB_VMODE_NONINTERLACED;
280 var->sync = FB_SYNC_VERT_HIGH_ACT;
281
282 var->xres = mode->x_res;
283 var->yres = mode->y_res;
284 var->xres_virtual = mode->x_res;
285 var->yres_virtual = (par->ypan) ?
286 info->fix.smem_len / mode->bytes_per_scan_line :
287 mode->y_res;
288 var->xoffset = 0;
289 var->yoffset = 0;
290 var->bits_per_pixel = mode->bits_per_pixel;
291
292 if (var->bits_per_pixel == 15)
293 var->bits_per_pixel = 16;
294
295 if (var->bits_per_pixel > 8) {
296 var->red.offset = mode->red_off;
297 var->red.length = mode->red_len;
298 var->green.offset = mode->green_off;
299 var->green.length = mode->green_len;
300 var->blue.offset = mode->blue_off;
301 var->blue.length = mode->blue_len;
302 var->transp.offset = mode->rsvd_off;
303 var->transp.length = mode->rsvd_len;
304 } else {
305 var->red.offset = 0;
306 var->green.offset = 0;
307 var->blue.offset = 0;
308 var->transp.offset = 0;
309
310 var->red.length = 8;
311 var->green.length = 8;
312 var->blue.length = 8;
313 var->transp.length = 0;
314 }
315 }
316
317 static int uvesafb_vbe_find_mode(struct uvesafb_par *par,
318 int xres, int yres, int depth, unsigned char flags)
319 {
320 int i, match = -1, h = 0, d = 0x7fffffff;
321
322 for (i = 0; i < par->vbe_modes_cnt; i++) {
323 h = abs(par->vbe_modes[i].x_res - xres) +
324 abs(par->vbe_modes[i].y_res - yres) +
325 abs(depth - par->vbe_modes[i].depth);
326
327 /*
328 * We have an exact match in terms of resolution
329 * and depth.
330 */
331 if (h == 0)
332 return i;
333
334 if (h < d || (h == d && par->vbe_modes[i].depth > depth)) {
335 d = h;
336 match = i;
337 }
338 }
339 i = 1;
340
341 if (flags & UVESAFB_EXACT_DEPTH &&
342 par->vbe_modes[match].depth != depth)
343 i = 0;
344
345 if (flags & UVESAFB_EXACT_RES && d > 24)
346 i = 0;
347
348 if (i != 0)
349 return match;
350 else
351 return -1;
352 }
353
354 static u8 *uvesafb_vbe_state_save(struct uvesafb_par *par)
355 {
356 struct uvesafb_ktask *task;
357 u8 *state;
358 int err;
359
360 if (!par->vbe_state_size)
361 return NULL;
362
363 state = kmalloc(par->vbe_state_size, GFP_KERNEL);
364 if (!state)
365 return ERR_PTR(-ENOMEM);
366
367 task = uvesafb_prep();
368 if (!task) {
369 kfree(state);
370 return NULL;
371 }
372
373 task->t.regs.eax = 0x4f04;
374 task->t.regs.ecx = 0x000f;
375 task->t.regs.edx = 0x0001;
376 task->t.flags = TF_BUF_RET | TF_BUF_ESBX;
377 task->t.buf_len = par->vbe_state_size;
378 task->buf = state;
379 err = uvesafb_exec(task);
380
381 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
382 printk(KERN_WARNING "uvesafb: VBE get state call "
383 "failed (eax=0x%x, err=%d)\n",
384 task->t.regs.eax, err);
385 kfree(state);
386 state = NULL;
387 }
388
389 uvesafb_free(task);
390 return state;
391 }
392
393 static void uvesafb_vbe_state_restore(struct uvesafb_par *par, u8 *state_buf)
394 {
395 struct uvesafb_ktask *task;
396 int err;
397
398 if (!state_buf)
399 return;
400
401 task = uvesafb_prep();
402 if (!task)
403 return;
404
405 task->t.regs.eax = 0x4f04;
406 task->t.regs.ecx = 0x000f;
407 task->t.regs.edx = 0x0002;
408 task->t.buf_len = par->vbe_state_size;
409 task->t.flags = TF_BUF_ESBX;
410 task->buf = state_buf;
411
412 err = uvesafb_exec(task);
413 if (err || (task->t.regs.eax & 0xffff) != 0x004f)
414 printk(KERN_WARNING "uvesafb: VBE state restore call "
415 "failed (eax=0x%x, err=%d)\n",
416 task->t.regs.eax, err);
417
418 uvesafb_free(task);
419 }
420
421 static int __devinit uvesafb_vbe_getinfo(struct uvesafb_ktask *task,
422 struct uvesafb_par *par)
423 {
424 int err;
425
426 task->t.regs.eax = 0x4f00;
427 task->t.flags = TF_VBEIB;
428 task->t.buf_len = sizeof(struct vbe_ib);
429 task->buf = &par->vbe_ib;
430 strncpy(par->vbe_ib.vbe_signature, "VBE2", 4);
431
432 err = uvesafb_exec(task);
433 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
434 printk(KERN_ERR "uvesafb: Getting VBE info block failed "
435 "(eax=0x%x, err=%d)\n", (u32)task->t.regs.eax,
436 err);
437 return -EINVAL;
438 }
439
440 if (par->vbe_ib.vbe_version < 0x0200) {
441 printk(KERN_ERR "uvesafb: Sorry, pre-VBE 2.0 cards are "
442 "not supported.\n");
443 return -EINVAL;
444 }
445
446 if (!par->vbe_ib.mode_list_ptr) {
447 printk(KERN_ERR "uvesafb: Missing mode list!\n");
448 return -EINVAL;
449 }
450
451 printk(KERN_INFO "uvesafb: ");
452
453 /*
454 * Convert string pointers and the mode list pointer into
455 * usable addresses. Print informational messages about the
456 * video adapter and its vendor.
457 */
458 if (par->vbe_ib.oem_vendor_name_ptr)
459 printk("%s, ",
460 ((char *)task->buf) + par->vbe_ib.oem_vendor_name_ptr);
461
462 if (par->vbe_ib.oem_product_name_ptr)
463 printk("%s, ",
464 ((char *)task->buf) + par->vbe_ib.oem_product_name_ptr);
465
466 if (par->vbe_ib.oem_product_rev_ptr)
467 printk("%s, ",
468 ((char *)task->buf) + par->vbe_ib.oem_product_rev_ptr);
469
470 if (par->vbe_ib.oem_string_ptr)
471 printk("OEM: %s, ",
472 ((char *)task->buf) + par->vbe_ib.oem_string_ptr);
473
474 printk("VBE v%d.%d\n", ((par->vbe_ib.vbe_version & 0xff00) >> 8),
475 par->vbe_ib.vbe_version & 0xff);
476
477 return 0;
478 }
479
480 static int __devinit uvesafb_vbe_getmodes(struct uvesafb_ktask *task,
481 struct uvesafb_par *par)
482 {
483 int off = 0, err;
484 u16 *mode;
485
486 par->vbe_modes_cnt = 0;
487
488 /* Count available modes. */
489 mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
490 while (*mode != 0xffff) {
491 par->vbe_modes_cnt++;
492 mode++;
493 }
494
495 par->vbe_modes = kzalloc(sizeof(struct vbe_mode_ib) *
496 par->vbe_modes_cnt, GFP_KERNEL);
497 if (!par->vbe_modes)
498 return -ENOMEM;
499
500 /* Get info about all available modes. */
501 mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
502 while (*mode != 0xffff) {
503 struct vbe_mode_ib *mib;
504
505 uvesafb_reset(task);
506 task->t.regs.eax = 0x4f01;
507 task->t.regs.ecx = (u32) *mode;
508 task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
509 task->t.buf_len = sizeof(struct vbe_mode_ib);
510 task->buf = par->vbe_modes + off;
511
512 err = uvesafb_exec(task);
513 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
514 printk(KERN_WARNING "uvesafb: Getting mode info block "
515 "for mode 0x%x failed (eax=0x%x, err=%d)\n",
516 *mode, (u32)task->t.regs.eax, err);
517 mode++;
518 par->vbe_modes_cnt--;
519 continue;
520 }
521
522 mib = task->buf;
523 mib->mode_id = *mode;
524
525 /*
526 * We only want modes that are supported with the current
527 * hardware configuration, color, graphics and that have
528 * support for the LFB.
529 */
530 if ((mib->mode_attr & VBE_MODE_MASK) == VBE_MODE_MASK &&
531 mib->bits_per_pixel >= 8)
532 off++;
533 else
534 par->vbe_modes_cnt--;
535
536 mode++;
537 mib->depth = mib->red_len + mib->green_len + mib->blue_len;
538
539 /*
540 * Handle 8bpp modes and modes with broken color component
541 * lengths.
542 */
543 if (mib->depth == 0 || (mib->depth == 24 &&
544 mib->bits_per_pixel == 32))
545 mib->depth = mib->bits_per_pixel;
546 }
547
548 if (par->vbe_modes_cnt > 0)
549 return 0;
550 else
551 return -EINVAL;
552 }
553
554 /*
555 * The Protected Mode Interface is 32-bit x86 code, so we only run it on
556 * x86 and not x86_64.
557 */
558 #ifdef CONFIG_X86_32
559 static int __devinit uvesafb_vbe_getpmi(struct uvesafb_ktask *task,
560 struct uvesafb_par *par)
561 {
562 int i, err;
563
564 uvesafb_reset(task);
565 task->t.regs.eax = 0x4f0a;
566 task->t.regs.ebx = 0x0;
567 err = uvesafb_exec(task);
568
569 if ((task->t.regs.eax & 0xffff) != 0x4f || task->t.regs.es < 0xc000) {
570 par->pmi_setpal = par->ypan = 0;
571 } else {
572 par->pmi_base = (u16 *)phys_to_virt(((u32)task->t.regs.es << 4)
573 + task->t.regs.edi);
574 par->pmi_start = (u8 *)par->pmi_base + par->pmi_base[1];
575 par->pmi_pal = (u8 *)par->pmi_base + par->pmi_base[2];
576 printk(KERN_INFO "uvesafb: protected mode interface info at "
577 "%04x:%04x\n",
578 (u16)task->t.regs.es, (u16)task->t.regs.edi);
579 printk(KERN_INFO "uvesafb: pmi: set display start = %p, "
580 "set palette = %p\n", par->pmi_start,
581 par->pmi_pal);
582
583 if (par->pmi_base[3]) {
584 printk(KERN_INFO "uvesafb: pmi: ports = ");
585 for (i = par->pmi_base[3]/2;
586 par->pmi_base[i] != 0xffff; i++)
587 printk("%x ", par->pmi_base[i]);
588 printk("\n");
589
590 if (par->pmi_base[i] != 0xffff) {
591 printk(KERN_INFO "uvesafb: can't handle memory"
592 " requests, pmi disabled\n");
593 par->ypan = par->pmi_setpal = 0;
594 }
595 }
596 }
597 return 0;
598 }
599 #endif /* CONFIG_X86_32 */
600
601 /*
602 * Check whether a video mode is supported by the Video BIOS and is
603 * compatible with the monitor limits.
604 */
605 static int __devinit uvesafb_is_valid_mode(struct fb_videomode *mode,
606 struct fb_info *info)
607 {
608 if (info->monspecs.gtf) {
609 fb_videomode_to_var(&info->var, mode);
610 if (fb_validate_mode(&info->var, info))
611 return 0;
612 }
613
614 if (uvesafb_vbe_find_mode(info->par, mode->xres, mode->yres, 8,
615 UVESAFB_EXACT_RES) == -1)
616 return 0;
617
618 return 1;
619 }
620
621 static int __devinit uvesafb_vbe_getedid(struct uvesafb_ktask *task,
622 struct fb_info *info)
623 {
624 struct uvesafb_par *par = info->par;
625 int err = 0;
626
627 if (noedid || par->vbe_ib.vbe_version < 0x0300)
628 return -EINVAL;
629
630 task->t.regs.eax = 0x4f15;
631 task->t.regs.ebx = 0;
632 task->t.regs.ecx = 0;
633 task->t.buf_len = 0;
634 task->t.flags = 0;
635
636 err = uvesafb_exec(task);
637
638 if ((task->t.regs.eax & 0xffff) != 0x004f || err)
639 return -EINVAL;
640
641 if ((task->t.regs.ebx & 0x3) == 3) {
642 printk(KERN_INFO "uvesafb: VBIOS/hardware supports both "
643 "DDC1 and DDC2 transfers\n");
644 } else if ((task->t.regs.ebx & 0x3) == 2) {
645 printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC2 "
646 "transfers\n");
647 } else if ((task->t.regs.ebx & 0x3) == 1) {
648 printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC1 "
649 "transfers\n");
650 } else {
651 printk(KERN_INFO "uvesafb: VBIOS/hardware doesn't support "
652 "DDC transfers\n");
653 return -EINVAL;
654 }
655
656 task->t.regs.eax = 0x4f15;
657 task->t.regs.ebx = 1;
658 task->t.regs.ecx = task->t.regs.edx = 0;
659 task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
660 task->t.buf_len = EDID_LENGTH;
661 task->buf = kzalloc(EDID_LENGTH, GFP_KERNEL);
662 if (!task->buf)
663 return -ENOMEM;
664
665 err = uvesafb_exec(task);
666
667 if ((task->t.regs.eax & 0xffff) == 0x004f && !err) {
668 fb_edid_to_monspecs(task->buf, &info->monspecs);
669
670 if (info->monspecs.vfmax && info->monspecs.hfmax) {
671 /*
672 * If the maximum pixel clock wasn't specified in
673 * the EDID block, set it to 300 MHz.
674 */
675 if (info->monspecs.dclkmax == 0)
676 info->monspecs.dclkmax = 300 * 1000000;
677 info->monspecs.gtf = 1;
678 }
679 } else {
680 err = -EINVAL;
681 }
682
683 kfree(task->buf);
684 return err;
685 }
686
687 static void __devinit uvesafb_vbe_getmonspecs(struct uvesafb_ktask *task,
688 struct fb_info *info)
689 {
690 struct uvesafb_par *par = info->par;
691 int i;
692
693 memset(&info->monspecs, 0, sizeof(info->monspecs));
694
695 /*
696 * If we don't get all necessary data from the EDID block,
697 * mark it as incompatible with the GTF and set nocrtc so
698 * that we always use the default BIOS refresh rate.
699 */
700 if (uvesafb_vbe_getedid(task, info)) {
701 info->monspecs.gtf = 0;
702 par->nocrtc = 1;
703 }
704
705 /* Kernel command line overrides. */
706 if (maxclk)
707 info->monspecs.dclkmax = maxclk * 1000000;
708 if (maxvf)
709 info->monspecs.vfmax = maxvf;
710 if (maxhf)
711 info->monspecs.hfmax = maxhf * 1000;
712
713 /*
714 * In case DDC transfers are not supported, the user can provide
715 * monitor limits manually. Lower limits are set to "safe" values.
716 */
717 if (info->monspecs.gtf == 0 && maxclk && maxvf && maxhf) {
718 info->monspecs.dclkmin = 0;
719 info->monspecs.vfmin = 60;
720 info->monspecs.hfmin = 29000;
721 info->monspecs.gtf = 1;
722 par->nocrtc = 0;
723 }
724
725 if (info->monspecs.gtf)
726 printk(KERN_INFO
727 "uvesafb: monitor limits: vf = %d Hz, hf = %d kHz, "
728 "clk = %d MHz\n", info->monspecs.vfmax,
729 (int)(info->monspecs.hfmax / 1000),
730 (int)(info->monspecs.dclkmax / 1000000));
731 else
732 printk(KERN_INFO "uvesafb: no monitor limits have been set, "
733 "default refresh rate will be used\n");
734
735 /* Add VBE modes to the modelist. */
736 for (i = 0; i < par->vbe_modes_cnt; i++) {
737 struct fb_var_screeninfo var;
738 struct vbe_mode_ib *mode;
739 struct fb_videomode vmode;
740
741 mode = &par->vbe_modes[i];
742 memset(&var, 0, sizeof(var));
743
744 var.xres = mode->x_res;
745 var.yres = mode->y_res;
746
747 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, &var, info);
748 fb_var_to_videomode(&vmode, &var);
749 fb_add_videomode(&vmode, &info->modelist);
750 }
751
752 /* Add valid VESA modes to our modelist. */
753 for (i = 0; i < VESA_MODEDB_SIZE; i++) {
754 if (uvesafb_is_valid_mode((struct fb_videomode *)
755 &vesa_modes[i], info))
756 fb_add_videomode(&vesa_modes[i], &info->modelist);
757 }
758
759 for (i = 0; i < info->monspecs.modedb_len; i++) {
760 if (uvesafb_is_valid_mode(&info->monspecs.modedb[i], info))
761 fb_add_videomode(&info->monspecs.modedb[i],
762 &info->modelist);
763 }
764
765 return;
766 }
767
768 static void __devinit uvesafb_vbe_getstatesize(struct uvesafb_ktask *task,
769 struct uvesafb_par *par)
770 {
771 int err;
772
773 uvesafb_reset(task);
774
775 /*
776 * Get the VBE state buffer size. We want all available
777 * hardware state data (CL = 0x0f).
778 */
779 task->t.regs.eax = 0x4f04;
780 task->t.regs.ecx = 0x000f;
781 task->t.regs.edx = 0x0000;
782 task->t.flags = 0;
783
784 err = uvesafb_exec(task);
785
786 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
787 printk(KERN_WARNING "uvesafb: VBE state buffer size "
788 "cannot be determined (eax=0x%x, err=%d)\n",
789 task->t.regs.eax, err);
790 par->vbe_state_size = 0;
791 return;
792 }
793
794 par->vbe_state_size = 64 * (task->t.regs.ebx & 0xffff);
795 }
796
797 static int __devinit uvesafb_vbe_init(struct fb_info *info)
798 {
799 struct uvesafb_ktask *task = NULL;
800 struct uvesafb_par *par = info->par;
801 int err;
802
803 task = uvesafb_prep();
804 if (!task)
805 return -ENOMEM;
806
807 err = uvesafb_vbe_getinfo(task, par);
808 if (err)
809 goto out;
810
811 err = uvesafb_vbe_getmodes(task, par);
812 if (err)
813 goto out;
814
815 par->nocrtc = nocrtc;
816 #ifdef CONFIG_X86_32
817 par->pmi_setpal = pmi_setpal;
818 par->ypan = ypan;
819
820 if (par->pmi_setpal || par->ypan) {
821 if (__supported_pte_mask & _PAGE_NX) {
822 par->pmi_setpal = par->ypan = 0;
823 printk(KERN_WARNING "uvesafb: NX protection is actively."
824 "We have better not to use the PMI.\n");
825 } else {
826 uvesafb_vbe_getpmi(task, par);
827 }
828 }
829 #else
830 /* The protected mode interface is not available on non-x86. */
831 par->pmi_setpal = par->ypan = 0;
832 #endif
833
834 INIT_LIST_HEAD(&info->modelist);
835 uvesafb_vbe_getmonspecs(task, info);
836 uvesafb_vbe_getstatesize(task, par);
837
838 out: uvesafb_free(task);
839 return err;
840 }
841
842 static int __devinit uvesafb_vbe_init_mode(struct fb_info *info)
843 {
844 struct list_head *pos;
845 struct fb_modelist *modelist;
846 struct fb_videomode *mode;
847 struct uvesafb_par *par = info->par;
848 int i, modeid;
849
850 /* Has the user requested a specific VESA mode? */
851 if (vbemode) {
852 for (i = 0; i < par->vbe_modes_cnt; i++) {
853 if (par->vbe_modes[i].mode_id == vbemode) {
854 modeid = i;
855 uvesafb_setup_var(&info->var, info,
856 &par->vbe_modes[modeid]);
857 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
858 &info->var, info);
859 /*
860 * With pixclock set to 0, the default BIOS
861 * timings will be used in set_par().
862 */
863 info->var.pixclock = 0;
864 goto gotmode;
865 }
866 }
867 printk(KERN_INFO "uvesafb: requested VBE mode 0x%x is "
868 "unavailable\n", vbemode);
869 vbemode = 0;
870 }
871
872 /* Count the modes in the modelist */
873 i = 0;
874 list_for_each(pos, &info->modelist)
875 i++;
876
877 /*
878 * Convert the modelist into a modedb so that we can use it with
879 * fb_find_mode().
880 */
881 mode = kzalloc(i * sizeof(*mode), GFP_KERNEL);
882 if (mode) {
883 i = 0;
884 list_for_each(pos, &info->modelist) {
885 modelist = list_entry(pos, struct fb_modelist, list);
886 mode[i] = modelist->mode;
887 i++;
888 }
889
890 if (!mode_option)
891 mode_option = UVESAFB_DEFAULT_MODE;
892
893 i = fb_find_mode(&info->var, info, mode_option, mode, i,
894 NULL, 8);
895
896 kfree(mode);
897 }
898
899 /* fb_find_mode() failed */
900 if (i == 0) {
901 info->var.xres = 640;
902 info->var.yres = 480;
903 mode = (struct fb_videomode *)
904 fb_find_best_mode(&info->var, &info->modelist);
905
906 if (mode) {
907 fb_videomode_to_var(&info->var, mode);
908 } else {
909 modeid = par->vbe_modes[0].mode_id;
910 uvesafb_setup_var(&info->var, info,
911 &par->vbe_modes[modeid]);
912 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
913 &info->var, info);
914
915 goto gotmode;
916 }
917 }
918
919 /* Look for a matching VBE mode. */
920 modeid = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres,
921 info->var.bits_per_pixel, UVESAFB_EXACT_RES);
922
923 if (modeid == -1)
924 return -EINVAL;
925
926 uvesafb_setup_var(&info->var, info, &par->vbe_modes[modeid]);
927
928 gotmode:
929 /*
930 * If we are not VBE3.0+ compliant, we're done -- the BIOS will
931 * ignore our timings anyway.
932 */
933 if (par->vbe_ib.vbe_version < 0x0300 || par->nocrtc)
934 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
935 &info->var, info);
936
937 return modeid;
938 }
939
940 static int uvesafb_setpalette(struct uvesafb_pal_entry *entries, int count,
941 int start, struct fb_info *info)
942 {
943 struct uvesafb_ktask *task;
944 #ifdef CONFIG_X86
945 struct uvesafb_par *par = info->par;
946 int i = par->mode_idx;
947 #endif
948 int err = 0;
949
950 /*
951 * We support palette modifications for 8 bpp modes only, so
952 * there can never be more than 256 entries.
953 */
954 if (start + count > 256)
955 return -EINVAL;
956
957 #ifdef CONFIG_X86
958 /* Use VGA registers if mode is VGA-compatible. */
959 if (i >= 0 && i < par->vbe_modes_cnt &&
960 par->vbe_modes[i].mode_attr & VBE_MODE_VGACOMPAT) {
961 for (i = 0; i < count; i++) {
962 outb_p(start + i, dac_reg);
963 outb_p(entries[i].red, dac_val);
964 outb_p(entries[i].green, dac_val);
965 outb_p(entries[i].blue, dac_val);
966 }
967 }
968 #ifdef CONFIG_X86_32
969 else if (par->pmi_setpal) {
970 __asm__ __volatile__(
971 "call *(%%esi)"
972 : /* no return value */
973 : "a" (0x4f09), /* EAX */
974 "b" (0), /* EBX */
975 "c" (count), /* ECX */
976 "d" (start), /* EDX */
977 "D" (entries), /* EDI */
978 "S" (&par->pmi_pal)); /* ESI */
979 }
980 #endif /* CONFIG_X86_32 */
981 else
982 #endif /* CONFIG_X86 */
983 {
984 task = uvesafb_prep();
985 if (!task)
986 return -ENOMEM;
987
988 task->t.regs.eax = 0x4f09;
989 task->t.regs.ebx = 0x0;
990 task->t.regs.ecx = count;
991 task->t.regs.edx = start;
992 task->t.flags = TF_BUF_ESDI;
993 task->t.buf_len = sizeof(struct uvesafb_pal_entry) * count;
994 task->buf = entries;
995
996 err = uvesafb_exec(task);
997 if ((task->t.regs.eax & 0xffff) != 0x004f)
998 err = 1;
999
1000 uvesafb_free(task);
1001 }
1002 return err;
1003 }
1004
1005 static int uvesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
1006 unsigned blue, unsigned transp,
1007 struct fb_info *info)
1008 {
1009 struct uvesafb_pal_entry entry;
1010 int shift = 16 - dac_width;
1011 int err = 0;
1012
1013 if (regno >= info->cmap.len)
1014 return -EINVAL;
1015
1016 if (info->var.bits_per_pixel == 8) {
1017 entry.red = red >> shift;
1018 entry.green = green >> shift;
1019 entry.blue = blue >> shift;
1020 entry.pad = 0;
1021
1022 err = uvesafb_setpalette(&entry, 1, regno, info);
1023 } else if (regno < 16) {
1024 switch (info->var.bits_per_pixel) {
1025 case 16:
1026 if (info->var.red.offset == 10) {
1027 /* 1:5:5:5 */
1028 ((u32 *) (info->pseudo_palette))[regno] =
1029 ((red & 0xf800) >> 1) |
1030 ((green & 0xf800) >> 6) |
1031 ((blue & 0xf800) >> 11);
1032 } else {
1033 /* 0:5:6:5 */
1034 ((u32 *) (info->pseudo_palette))[regno] =
1035 ((red & 0xf800) ) |
1036 ((green & 0xfc00) >> 5) |
1037 ((blue & 0xf800) >> 11);
1038 }
1039 break;
1040
1041 case 24:
1042 case 32:
1043 red >>= 8;
1044 green >>= 8;
1045 blue >>= 8;
1046 ((u32 *)(info->pseudo_palette))[regno] =
1047 (red << info->var.red.offset) |
1048 (green << info->var.green.offset) |
1049 (blue << info->var.blue.offset);
1050 break;
1051 }
1052 }
1053 return err;
1054 }
1055
1056 static int uvesafb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
1057 {
1058 struct uvesafb_pal_entry *entries;
1059 int shift = 16 - dac_width;
1060 int i, err = 0;
1061
1062 if (info->var.bits_per_pixel == 8) {
1063 if (cmap->start + cmap->len > info->cmap.start +
1064 info->cmap.len || cmap->start < info->cmap.start)
1065 return -EINVAL;
1066
1067 entries = kmalloc(sizeof(*entries) * cmap->len, GFP_KERNEL);
1068 if (!entries)
1069 return -ENOMEM;
1070
1071 for (i = 0; i < cmap->len; i++) {
1072 entries[i].red = cmap->red[i] >> shift;
1073 entries[i].green = cmap->green[i] >> shift;
1074 entries[i].blue = cmap->blue[i] >> shift;
1075 entries[i].pad = 0;
1076 }
1077 err = uvesafb_setpalette(entries, cmap->len, cmap->start, info);
1078 kfree(entries);
1079 } else {
1080 /*
1081 * For modes with bpp > 8, we only set the pseudo palette in
1082 * the fb_info struct. We rely on uvesafb_setcolreg to do all
1083 * sanity checking.
1084 */
1085 for (i = 0; i < cmap->len; i++) {
1086 err |= uvesafb_setcolreg(cmap->start + i, cmap->red[i],
1087 cmap->green[i], cmap->blue[i],
1088 0, info);
1089 }
1090 }
1091 return err;
1092 }
1093
1094 static int uvesafb_pan_display(struct fb_var_screeninfo *var,
1095 struct fb_info *info)
1096 {
1097 #ifdef CONFIG_X86_32
1098 int offset;
1099 struct uvesafb_par *par = info->par;
1100
1101 offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;
1102
1103 /*
1104 * It turns out it's not the best idea to do panning via vm86,
1105 * so we only allow it if we have a PMI.
1106 */
1107 if (par->pmi_start) {
1108 __asm__ __volatile__(
1109 "call *(%%edi)"
1110 : /* no return value */
1111 : "a" (0x4f07), /* EAX */
1112 "b" (0), /* EBX */
1113 "c" (offset), /* ECX */
1114 "d" (offset >> 16), /* EDX */
1115 "D" (&par->pmi_start)); /* EDI */
1116 }
1117 #endif
1118 return 0;
1119 }
1120
1121 static int uvesafb_blank(int blank, struct fb_info *info)
1122 {
1123 struct uvesafb_ktask *task;
1124 int err = 1;
1125 #ifdef CONFIG_X86
1126 struct uvesafb_par *par = info->par;
1127
1128 if (par->vbe_ib.capabilities & VBE_CAP_VGACOMPAT) {
1129 int loop = 10000;
1130 u8 seq = 0, crtc17 = 0;
1131
1132 if (blank == FB_BLANK_POWERDOWN) {
1133 seq = 0x20;
1134 crtc17 = 0x00;
1135 err = 0;
1136 } else {
1137 seq = 0x00;
1138 crtc17 = 0x80;
1139 err = (blank == FB_BLANK_UNBLANK) ? 0 : -EINVAL;
1140 }
1141
1142 vga_wseq(NULL, 0x00, 0x01);
1143 seq |= vga_rseq(NULL, 0x01) & ~0x20;
1144 vga_wseq(NULL, 0x00, seq);
1145
1146 crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80;
1147 while (loop--);
1148 vga_wcrt(NULL, 0x17, crtc17);
1149 vga_wseq(NULL, 0x00, 0x03);
1150 } else
1151 #endif /* CONFIG_X86 */
1152 {
1153 task = uvesafb_prep();
1154 if (!task)
1155 return -ENOMEM;
1156
1157 task->t.regs.eax = 0x4f10;
1158 switch (blank) {
1159 case FB_BLANK_UNBLANK:
1160 task->t.regs.ebx = 0x0001;
1161 break;
1162 case FB_BLANK_NORMAL:
1163 task->t.regs.ebx = 0x0101; /* standby */
1164 break;
1165 case FB_BLANK_POWERDOWN:
1166 task->t.regs.ebx = 0x0401; /* powerdown */
1167 break;
1168 default:
1169 goto out;
1170 }
1171
1172 err = uvesafb_exec(task);
1173 if (err || (task->t.regs.eax & 0xffff) != 0x004f)
1174 err = 1;
1175 out: uvesafb_free(task);
1176 }
1177 return err;
1178 }
1179
1180 static int uvesafb_open(struct fb_info *info, int user)
1181 {
1182 struct uvesafb_par *par = info->par;
1183 int cnt = atomic_read(&par->ref_count);
1184 u8 *buf = NULL;
1185
1186 if (!cnt && par->vbe_state_size) {
1187 buf = uvesafb_vbe_state_save(par);
1188 if (IS_ERR(buf)) {
1189 printk(KERN_WARNING "uvesafb: save hardware state"
1190 "failed, error code is %ld!\n", PTR_ERR(buf));
1191 } else {
1192 par->vbe_state_orig = buf;
1193 }
1194 }
1195
1196 atomic_inc(&par->ref_count);
1197 return 0;
1198 }
1199
1200 static int uvesafb_release(struct fb_info *info, int user)
1201 {
1202 struct uvesafb_ktask *task = NULL;
1203 struct uvesafb_par *par = info->par;
1204 int cnt = atomic_read(&par->ref_count);
1205
1206 if (!cnt)
1207 return -EINVAL;
1208
1209 if (cnt != 1)
1210 goto out;
1211
1212 task = uvesafb_prep();
1213 if (!task)
1214 goto out;
1215
1216 /* First, try to set the standard 80x25 text mode. */
1217 task->t.regs.eax = 0x0003;
1218 uvesafb_exec(task);
1219
1220 /*
1221 * Now try to restore whatever hardware state we might have
1222 * saved when the fb device was first opened.
1223 */
1224 uvesafb_vbe_state_restore(par, par->vbe_state_orig);
1225 out:
1226 atomic_dec(&par->ref_count);
1227 if (task)
1228 uvesafb_free(task);
1229 return 0;
1230 }
1231
1232 static int uvesafb_set_par(struct fb_info *info)
1233 {
1234 struct uvesafb_par *par = info->par;
1235 struct uvesafb_ktask *task = NULL;
1236 struct vbe_crtc_ib *crtc = NULL;
1237 struct vbe_mode_ib *mode = NULL;
1238 int i, err = 0, depth = info->var.bits_per_pixel;
1239
1240 if (depth > 8 && depth != 32)
1241 depth = info->var.red.length + info->var.green.length +
1242 info->var.blue.length;
1243
1244 i = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, depth,
1245 UVESAFB_EXACT_RES | UVESAFB_EXACT_DEPTH);
1246 if (i >= 0)
1247 mode = &par->vbe_modes[i];
1248 else
1249 return -EINVAL;
1250
1251 task = uvesafb_prep();
1252 if (!task)
1253 return -ENOMEM;
1254 setmode:
1255 task->t.regs.eax = 0x4f02;
1256 task->t.regs.ebx = mode->mode_id | 0x4000; /* use LFB */
1257
1258 if (par->vbe_ib.vbe_version >= 0x0300 && !par->nocrtc &&
1259 info->var.pixclock != 0) {
1260 task->t.regs.ebx |= 0x0800; /* use CRTC data */
1261 task->t.flags = TF_BUF_ESDI;
1262 crtc = kzalloc(sizeof(struct vbe_crtc_ib), GFP_KERNEL);
1263 if (!crtc) {
1264 err = -ENOMEM;
1265 goto out;
1266 }
1267 crtc->horiz_start = info->var.xres + info->var.right_margin;
1268 crtc->horiz_end = crtc->horiz_start + info->var.hsync_len;
1269 crtc->horiz_total = crtc->horiz_end + info->var.left_margin;
1270
1271 crtc->vert_start = info->var.yres + info->var.lower_margin;
1272 crtc->vert_end = crtc->vert_start + info->var.vsync_len;
1273 crtc->vert_total = crtc->vert_end + info->var.upper_margin;
1274
1275 crtc->pixel_clock = PICOS2KHZ(info->var.pixclock) * 1000;
1276 crtc->refresh_rate = (u16)(100 * (crtc->pixel_clock /
1277 (crtc->vert_total * crtc->horiz_total)));
1278
1279 if (info->var.vmode & FB_VMODE_DOUBLE)
1280 crtc->flags |= 0x1;
1281 if (info->var.vmode & FB_VMODE_INTERLACED)
1282 crtc->flags |= 0x2;
1283 if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
1284 crtc->flags |= 0x4;
1285 if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
1286 crtc->flags |= 0x8;
1287 memcpy(&par->crtc, crtc, sizeof(*crtc));
1288 } else {
1289 memset(&par->crtc, 0, sizeof(*crtc));
1290 }
1291
1292 task->t.buf_len = sizeof(struct vbe_crtc_ib);
1293 task->buf = &par->crtc;
1294
1295 err = uvesafb_exec(task);
1296 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
1297 /*
1298 * The mode switch might have failed because we tried to
1299 * use our own timings. Try again with the default timings.
1300 */
1301 if (crtc != NULL) {
1302 printk(KERN_WARNING "uvesafb: mode switch failed "
1303 "(eax=0x%x, err=%d). Trying again with "
1304 "default timings.\n", task->t.regs.eax, err);
1305 uvesafb_reset(task);
1306 kfree(crtc);
1307 crtc = NULL;
1308 info->var.pixclock = 0;
1309 goto setmode;
1310 } else {
1311 printk(KERN_ERR "uvesafb: mode switch failed (eax="
1312 "0x%x, err=%d)\n", task->t.regs.eax, err);
1313 err = -EINVAL;
1314 goto out;
1315 }
1316 }
1317 par->mode_idx = i;
1318
1319 /* For 8bpp modes, always try to set the DAC to 8 bits. */
1320 if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC &&
1321 mode->bits_per_pixel <= 8) {
1322 uvesafb_reset(task);
1323 task->t.regs.eax = 0x4f08;
1324 task->t.regs.ebx = 0x0800;
1325
1326 err = uvesafb_exec(task);
1327 if (err || (task->t.regs.eax & 0xffff) != 0x004f ||
1328 ((task->t.regs.ebx & 0xff00) >> 8) != 8) {
1329 dac_width = 6;
1330 } else {
1331 dac_width = 8;
1332 }
1333 }
1334
1335 info->fix.visual = (info->var.bits_per_pixel == 8) ?
1336 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
1337 info->fix.line_length = mode->bytes_per_scan_line;
1338
1339 out: if (crtc != NULL)
1340 kfree(crtc);
1341 uvesafb_free(task);
1342
1343 return err;
1344 }
1345
1346 static void uvesafb_check_limits(struct fb_var_screeninfo *var,
1347 struct fb_info *info)
1348 {
1349 const struct fb_videomode *mode;
1350 struct uvesafb_par *par = info->par;
1351
1352 /*
1353 * If pixclock is set to 0, then we're using default BIOS timings
1354 * and thus don't have to perform any checks here.
1355 */
1356 if (!var->pixclock)
1357 return;
1358
1359 if (par->vbe_ib.vbe_version < 0x0300) {
1360 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, var, info);
1361 return;
1362 }
1363
1364 if (!fb_validate_mode(var, info))
1365 return;
1366
1367 mode = fb_find_best_mode(var, &info->modelist);
1368 if (mode) {
1369 if (mode->xres == var->xres && mode->yres == var->yres &&
1370 !(mode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))) {
1371 fb_videomode_to_var(var, mode);
1372 return;
1373 }
1374 }
1375
1376 if (info->monspecs.gtf && !fb_get_mode(FB_MAXTIMINGS, 0, var, info))
1377 return;
1378 /* Use default refresh rate */
1379 var->pixclock = 0;
1380 }
1381
1382 static int uvesafb_check_var(struct fb_var_screeninfo *var,
1383 struct fb_info *info)
1384 {
1385 struct uvesafb_par *par = info->par;
1386 struct vbe_mode_ib *mode = NULL;
1387 int match = -1;
1388 int depth = var->red.length + var->green.length + var->blue.length;
1389
1390 /*
1391 * Various apps will use bits_per_pixel to set the color depth,
1392 * which is theoretically incorrect, but which we'll try to handle
1393 * here.
1394 */
1395 if (depth == 0 || abs(depth - var->bits_per_pixel) >= 8)
1396 depth = var->bits_per_pixel;
1397
1398 match = uvesafb_vbe_find_mode(par, var->xres, var->yres, depth,
1399 UVESAFB_EXACT_RES);
1400 if (match == -1)
1401 return -EINVAL;
1402
1403 mode = &par->vbe_modes[match];
1404 uvesafb_setup_var(var, info, mode);
1405
1406 /*
1407 * Check whether we have remapped enough memory for this mode.
1408 * We might be called at an early stage, when we haven't remapped
1409 * any memory yet, in which case we simply skip the check.
1410 */
1411 if (var->yres * mode->bytes_per_scan_line > info->fix.smem_len
1412 && info->fix.smem_len)
1413 return -EINVAL;
1414
1415 if ((var->vmode & FB_VMODE_DOUBLE) &&
1416 !(par->vbe_modes[match].mode_attr & 0x100))
1417 var->vmode &= ~FB_VMODE_DOUBLE;
1418
1419 if ((var->vmode & FB_VMODE_INTERLACED) &&
1420 !(par->vbe_modes[match].mode_attr & 0x200))
1421 var->vmode &= ~FB_VMODE_INTERLACED;
1422
1423 uvesafb_check_limits(var, info);
1424
1425 var->xres_virtual = var->xres;
1426 var->yres_virtual = (par->ypan) ?
1427 info->fix.smem_len / mode->bytes_per_scan_line :
1428 var->yres;
1429 return 0;
1430 }
1431
1432 static struct fb_ops uvesafb_ops = {
1433 .owner = THIS_MODULE,
1434 .fb_open = uvesafb_open,
1435 .fb_release = uvesafb_release,
1436 .fb_setcolreg = uvesafb_setcolreg,
1437 .fb_setcmap = uvesafb_setcmap,
1438 .fb_pan_display = uvesafb_pan_display,
1439 .fb_blank = uvesafb_blank,
1440 .fb_fillrect = cfb_fillrect,
1441 .fb_copyarea = cfb_copyarea,
1442 .fb_imageblit = cfb_imageblit,
1443 .fb_check_var = uvesafb_check_var,
1444 .fb_set_par = uvesafb_set_par,
1445 };
1446
1447 static void __devinit uvesafb_init_info(struct fb_info *info,
1448 struct vbe_mode_ib *mode)
1449 {
1450 unsigned int size_vmode;
1451 unsigned int size_remap;
1452 unsigned int size_total;
1453 struct uvesafb_par *par = info->par;
1454 int i, h;
1455
1456 info->pseudo_palette = ((u8 *)info->par + sizeof(struct uvesafb_par));
1457 info->fix = uvesafb_fix;
1458 info->fix.ypanstep = par->ypan ? 1 : 0;
1459 info->fix.ywrapstep = (par->ypan > 1) ? 1 : 0;
1460
1461 /* Disable blanking if the user requested so. */
1462 if (!blank)
1463 info->fbops->fb_blank = NULL;
1464
1465 /*
1466 * Find out how much IO memory is required for the mode with
1467 * the highest resolution.
1468 */
1469 size_remap = 0;
1470 for (i = 0; i < par->vbe_modes_cnt; i++) {
1471 h = par->vbe_modes[i].bytes_per_scan_line *
1472 par->vbe_modes[i].y_res;
1473 if (h > size_remap)
1474 size_remap = h;
1475 }
1476 size_remap *= 2;
1477
1478 /*
1479 * size_vmode -- that is the amount of memory needed for the
1480 * used video mode, i.e. the minimum amount of
1481 * memory we need.
1482 */
1483 if (mode != NULL) {
1484 size_vmode = info->var.yres * mode->bytes_per_scan_line;
1485 } else {
1486 size_vmode = info->var.yres * info->var.xres *
1487 ((info->var.bits_per_pixel + 7) >> 3);
1488 }
1489
1490 /*
1491 * size_total -- all video memory we have. Used for mtrr
1492 * entries, resource allocation and bounds
1493 * checking.
1494 */
1495 size_total = par->vbe_ib.total_memory * 65536;
1496 if (vram_total)
1497 size_total = vram_total * 1024 * 1024;
1498 if (size_total < size_vmode)
1499 size_total = size_vmode;
1500
1501 /*
1502 * size_remap -- the amount of video memory we are going to
1503 * use for vesafb. With modern cards it is no
1504 * option to simply use size_total as th
1505 * wastes plenty of kernel address space.
1506 */
1507 if (vram_remap)
1508 size_remap = vram_remap * 1024 * 1024;
1509 if (size_remap < size_vmode)
1510 size_remap = size_vmode;
1511 if (size_remap > size_total)
1512 size_remap = size_total;
1513
1514 info->fix.smem_len = size_remap;
1515 info->fix.smem_start = mode->phys_base_ptr;
1516
1517 /*
1518 * We have to set yres_virtual here because when setup_var() was
1519 * called, smem_len wasn't defined yet.
1520 */
1521 info->var.yres_virtual = info->fix.smem_len /
1522 mode->bytes_per_scan_line;
1523
1524 if (par->ypan && info->var.yres_virtual > info->var.yres) {
1525 printk(KERN_INFO "uvesafb: scrolling: %s "
1526 "using protected mode interface, "
1527 "yres_virtual=%d\n",
1528 (par->ypan > 1) ? "ywrap" : "ypan",
1529 info->var.yres_virtual);
1530 } else {
1531 printk(KERN_INFO "uvesafb: scrolling: redraw\n");
1532 info->var.yres_virtual = info->var.yres;
1533 par->ypan = 0;
1534 }
1535
1536 info->flags = FBINFO_FLAG_DEFAULT |
1537 (par->ypan ? FBINFO_HWACCEL_YPAN : 0);
1538
1539 if (!par->ypan)
1540 info->fbops->fb_pan_display = NULL;
1541 }
1542
1543 static void __devinit uvesafb_init_mtrr(struct fb_info *info)
1544 {
1545 #ifdef CONFIG_MTRR
1546 if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) {
1547 int temp_size = info->fix.smem_len;
1548 unsigned int type = 0;
1549
1550 switch (mtrr) {
1551 case 1:
1552 type = MTRR_TYPE_UNCACHABLE;
1553 break;
1554 case 2:
1555 type = MTRR_TYPE_WRBACK;
1556 break;
1557 case 3:
1558 type = MTRR_TYPE_WRCOMB;
1559 break;
1560 case 4:
1561 type = MTRR_TYPE_WRTHROUGH;
1562 break;
1563 default:
1564 type = 0;
1565 break;
1566 }
1567
1568 if (type) {
1569 int rc;
1570
1571 /* Find the largest power-of-two */
1572 temp_size = roundup_pow_of_two(temp_size);
1573
1574 /* Try and find a power of two to add */
1575 do {
1576 rc = mtrr_add(info->fix.smem_start,
1577 temp_size, type, 1);
1578 temp_size >>= 1;
1579 } while (temp_size >= PAGE_SIZE && rc == -EINVAL);
1580 }
1581 }
1582 #endif /* CONFIG_MTRR */
1583 }
1584
1585 static void __devinit uvesafb_ioremap(struct fb_info *info)
1586 {
1587 #ifdef CONFIG_X86
1588 switch (mtrr) {
1589 case 1: /* uncachable */
1590 info->screen_base = ioremap_nocache(info->fix.smem_start, info->fix.smem_len);
1591 break;
1592 case 2: /* write-back */
1593 info->screen_base = ioremap_cache(info->fix.smem_start, info->fix.smem_len);
1594 break;
1595 case 3: /* write-combining */
1596 info->screen_base = ioremap_wc(info->fix.smem_start, info->fix.smem_len);
1597 break;
1598 case 4: /* write-through */
1599 default:
1600 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
1601 break;
1602 }
1603 #else
1604 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
1605 #endif /* CONFIG_X86 */
1606 }
1607
1608 static ssize_t uvesafb_show_vbe_ver(struct device *dev,
1609 struct device_attribute *attr, char *buf)
1610 {
1611 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1612 struct uvesafb_par *par = info->par;
1613
1614 return snprintf(buf, PAGE_SIZE, "%.4x\n", par->vbe_ib.vbe_version);
1615 }
1616
1617 static DEVICE_ATTR(vbe_version, S_IRUGO, uvesafb_show_vbe_ver, NULL);
1618
1619 static ssize_t uvesafb_show_vbe_modes(struct device *dev,
1620 struct device_attribute *attr, char *buf)
1621 {
1622 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1623 struct uvesafb_par *par = info->par;
1624 int ret = 0, i;
1625
1626 for (i = 0; i < par->vbe_modes_cnt && ret < PAGE_SIZE; i++) {
1627 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1628 "%dx%d-%d, 0x%.4x\n",
1629 par->vbe_modes[i].x_res, par->vbe_modes[i].y_res,
1630 par->vbe_modes[i].depth, par->vbe_modes[i].mode_id);
1631 }
1632
1633 return ret;
1634 }
1635
1636 static DEVICE_ATTR(vbe_modes, S_IRUGO, uvesafb_show_vbe_modes, NULL);
1637
1638 static ssize_t uvesafb_show_vendor(struct device *dev,
1639 struct device_attribute *attr, char *buf)
1640 {
1641 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1642 struct uvesafb_par *par = info->par;
1643
1644 if (par->vbe_ib.oem_vendor_name_ptr)
1645 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1646 (&par->vbe_ib) + par->vbe_ib.oem_vendor_name_ptr);
1647 else
1648 return 0;
1649 }
1650
1651 static DEVICE_ATTR(oem_vendor, S_IRUGO, uvesafb_show_vendor, NULL);
1652
1653 static ssize_t uvesafb_show_product_name(struct device *dev,
1654 struct device_attribute *attr, char *buf)
1655 {
1656 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1657 struct uvesafb_par *par = info->par;
1658
1659 if (par->vbe_ib.oem_product_name_ptr)
1660 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1661 (&par->vbe_ib) + par->vbe_ib.oem_product_name_ptr);
1662 else
1663 return 0;
1664 }
1665
1666 static DEVICE_ATTR(oem_product_name, S_IRUGO, uvesafb_show_product_name, NULL);
1667
1668 static ssize_t uvesafb_show_product_rev(struct device *dev,
1669 struct device_attribute *attr, char *buf)
1670 {
1671 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1672 struct uvesafb_par *par = info->par;
1673
1674 if (par->vbe_ib.oem_product_rev_ptr)
1675 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1676 (&par->vbe_ib) + par->vbe_ib.oem_product_rev_ptr);
1677 else
1678 return 0;
1679 }
1680
1681 static DEVICE_ATTR(oem_product_rev, S_IRUGO, uvesafb_show_product_rev, NULL);
1682
1683 static ssize_t uvesafb_show_oem_string(struct device *dev,
1684 struct device_attribute *attr, char *buf)
1685 {
1686 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1687 struct uvesafb_par *par = info->par;
1688
1689 if (par->vbe_ib.oem_string_ptr)
1690 return snprintf(buf, PAGE_SIZE, "%s\n",
1691 (char *)(&par->vbe_ib) + par->vbe_ib.oem_string_ptr);
1692 else
1693 return 0;
1694 }
1695
1696 static DEVICE_ATTR(oem_string, S_IRUGO, uvesafb_show_oem_string, NULL);
1697
1698 static ssize_t uvesafb_show_nocrtc(struct device *dev,
1699 struct device_attribute *attr, char *buf)
1700 {
1701 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1702 struct uvesafb_par *par = info->par;
1703
1704 return snprintf(buf, PAGE_SIZE, "%d\n", par->nocrtc);
1705 }
1706
1707 static ssize_t uvesafb_store_nocrtc(struct device *dev,
1708 struct device_attribute *attr, const char *buf, size_t count)
1709 {
1710 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1711 struct uvesafb_par *par = info->par;
1712
1713 if (count > 0) {
1714 if (buf[0] == '0')
1715 par->nocrtc = 0;
1716 else
1717 par->nocrtc = 1;
1718 }
1719 return count;
1720 }
1721
1722 static DEVICE_ATTR(nocrtc, S_IRUGO | S_IWUSR, uvesafb_show_nocrtc,
1723 uvesafb_store_nocrtc);
1724
1725 static struct attribute *uvesafb_dev_attrs[] = {
1726 &dev_attr_vbe_version.attr,
1727 &dev_attr_vbe_modes.attr,
1728 &dev_attr_oem_vendor.attr,
1729 &dev_attr_oem_product_name.attr,
1730 &dev_attr_oem_product_rev.attr,
1731 &dev_attr_oem_string.attr,
1732 &dev_attr_nocrtc.attr,
1733 NULL,
1734 };
1735
1736 static struct attribute_group uvesafb_dev_attgrp = {
1737 .name = NULL,
1738 .attrs = uvesafb_dev_attrs,
1739 };
1740
1741 static int __devinit uvesafb_probe(struct platform_device *dev)
1742 {
1743 struct fb_info *info;
1744 struct vbe_mode_ib *mode = NULL;
1745 struct uvesafb_par *par;
1746 int err = 0, i;
1747
1748 info = framebuffer_alloc(sizeof(*par) + sizeof(u32) * 256, &dev->dev);
1749 if (!info)
1750 return -ENOMEM;
1751
1752 par = info->par;
1753
1754 err = uvesafb_vbe_init(info);
1755 if (err) {
1756 printk(KERN_ERR "uvesafb: vbe_init() failed with %d\n", err);
1757 goto out;
1758 }
1759
1760 info->fbops = &uvesafb_ops;
1761
1762 i = uvesafb_vbe_init_mode(info);
1763 if (i < 0) {
1764 err = -EINVAL;
1765 goto out;
1766 } else {
1767 mode = &par->vbe_modes[i];
1768 }
1769
1770 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
1771 err = -ENXIO;
1772 goto out;
1773 }
1774
1775 uvesafb_init_info(info, mode);
1776
1777 if (!request_region(0x3c0, 32, "uvesafb")) {
1778 printk(KERN_ERR "uvesafb: request region 0x3c0-0x3e0 failed\n");
1779 err = -EIO;
1780 goto out_mode;
1781 }
1782
1783 if (!request_mem_region(info->fix.smem_start, info->fix.smem_len,
1784 "uvesafb")) {
1785 printk(KERN_ERR "uvesafb: cannot reserve video memory at "
1786 "0x%lx\n", info->fix.smem_start);
1787 err = -EIO;
1788 goto out_reg;
1789 }
1790
1791 uvesafb_init_mtrr(info);
1792 uvesafb_ioremap(info);
1793
1794 if (!info->screen_base) {
1795 printk(KERN_ERR
1796 "uvesafb: abort, cannot ioremap 0x%x bytes of video "
1797 "memory at 0x%lx\n",
1798 info->fix.smem_len, info->fix.smem_start);
1799 err = -EIO;
1800 goto out_mem;
1801 }
1802
1803 platform_set_drvdata(dev, info);
1804
1805 if (register_framebuffer(info) < 0) {
1806 printk(KERN_ERR
1807 "uvesafb: failed to register framebuffer device\n");
1808 err = -EINVAL;
1809 goto out_unmap;
1810 }
1811
1812 printk(KERN_INFO "uvesafb: framebuffer at 0x%lx, mapped to 0x%p, "
1813 "using %dk, total %dk\n", info->fix.smem_start,
1814 info->screen_base, info->fix.smem_len/1024,
1815 par->vbe_ib.total_memory * 64);
1816 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
1817 info->fix.id);
1818
1819 err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1820 if (err != 0)
1821 printk(KERN_WARNING "fb%d: failed to register attributes\n",
1822 info->node);
1823
1824 return 0;
1825
1826 out_unmap:
1827 iounmap(info->screen_base);
1828 out_mem:
1829 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1830 out_reg:
1831 release_region(0x3c0, 32);
1832 out_mode:
1833 if (!list_empty(&info->modelist))
1834 fb_destroy_modelist(&info->modelist);
1835 fb_destroy_modedb(info->monspecs.modedb);
1836 fb_dealloc_cmap(&info->cmap);
1837 out:
1838 if (par->vbe_modes)
1839 kfree(par->vbe_modes);
1840
1841 framebuffer_release(info);
1842 return err;
1843 }
1844
1845 static int uvesafb_remove(struct platform_device *dev)
1846 {
1847 struct fb_info *info = platform_get_drvdata(dev);
1848
1849 if (info) {
1850 struct uvesafb_par *par = info->par;
1851
1852 sysfs_remove_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1853 unregister_framebuffer(info);
1854 release_region(0x3c0, 32);
1855 iounmap(info->screen_base);
1856 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1857 fb_destroy_modedb(info->monspecs.modedb);
1858 fb_dealloc_cmap(&info->cmap);
1859
1860 if (par) {
1861 if (par->vbe_modes)
1862 kfree(par->vbe_modes);
1863 if (par->vbe_state_orig)
1864 kfree(par->vbe_state_orig);
1865 if (par->vbe_state_saved)
1866 kfree(par->vbe_state_saved);
1867 }
1868
1869 framebuffer_release(info);
1870 }
1871 return 0;
1872 }
1873
1874 static struct platform_driver uvesafb_driver = {
1875 .probe = uvesafb_probe,
1876 .remove = uvesafb_remove,
1877 .driver = {
1878 .name = "uvesafb",
1879 },
1880 };
1881
1882 static struct platform_device *uvesafb_device;
1883
1884 #ifndef MODULE
1885 static int __devinit uvesafb_setup(char *options)
1886 {
1887 char *this_opt;
1888
1889 if (!options || !*options)
1890 return 0;
1891
1892 while ((this_opt = strsep(&options, ",")) != NULL) {
1893 if (!*this_opt) continue;
1894
1895 if (!strcmp(this_opt, "redraw"))
1896 ypan = 0;
1897 else if (!strcmp(this_opt, "ypan"))
1898 ypan = 1;
1899 else if (!strcmp(this_opt, "ywrap"))
1900 ypan = 2;
1901 else if (!strcmp(this_opt, "vgapal"))
1902 pmi_setpal = 0;
1903 else if (!strcmp(this_opt, "pmipal"))
1904 pmi_setpal = 1;
1905 else if (!strncmp(this_opt, "mtrr:", 5))
1906 mtrr = simple_strtoul(this_opt+5, NULL, 0);
1907 else if (!strcmp(this_opt, "nomtrr"))
1908 mtrr = 0;
1909 else if (!strcmp(this_opt, "nocrtc"))
1910 nocrtc = 1;
1911 else if (!strcmp(this_opt, "noedid"))
1912 noedid = 1;
1913 else if (!strcmp(this_opt, "noblank"))
1914 blank = 0;
1915 else if (!strncmp(this_opt, "vtotal:", 7))
1916 vram_total = simple_strtoul(this_opt + 7, NULL, 0);
1917 else if (!strncmp(this_opt, "vremap:", 7))
1918 vram_remap = simple_strtoul(this_opt + 7, NULL, 0);
1919 else if (!strncmp(this_opt, "maxhf:", 6))
1920 maxhf = simple_strtoul(this_opt + 6, NULL, 0);
1921 else if (!strncmp(this_opt, "maxvf:", 6))
1922 maxvf = simple_strtoul(this_opt + 6, NULL, 0);
1923 else if (!strncmp(this_opt, "maxclk:", 7))
1924 maxclk = simple_strtoul(this_opt + 7, NULL, 0);
1925 else if (!strncmp(this_opt, "vbemode:", 8))
1926 vbemode = simple_strtoul(this_opt + 8, NULL, 0);
1927 else if (this_opt[0] >= '0' && this_opt[0] <= '9') {
1928 mode_option = this_opt;
1929 } else {
1930 printk(KERN_WARNING
1931 "uvesafb: unrecognized option %s\n", this_opt);
1932 }
1933 }
1934
1935 return 0;
1936 }
1937 #endif /* !MODULE */
1938
1939 static ssize_t show_v86d(struct device_driver *dev, char *buf)
1940 {
1941 return snprintf(buf, PAGE_SIZE, "%s\n", v86d_path);
1942 }
1943
1944 static ssize_t store_v86d(struct device_driver *dev, const char *buf,
1945 size_t count)
1946 {
1947 strncpy(v86d_path, buf, PATH_MAX);
1948 return count;
1949 }
1950
1951 static DRIVER_ATTR(v86d, S_IRUGO | S_IWUSR, show_v86d, store_v86d);
1952
1953 static int __devinit uvesafb_init(void)
1954 {
1955 int err;
1956
1957 #ifndef MODULE
1958 char *option = NULL;
1959
1960 if (fb_get_options("uvesafb", &option))
1961 return -ENODEV;
1962 uvesafb_setup(option);
1963 #endif
1964 err = cn_add_callback(&uvesafb_cn_id, "uvesafb", uvesafb_cn_callback);
1965 if (err)
1966 return err;
1967
1968 err = platform_driver_register(&uvesafb_driver);
1969
1970 if (!err) {
1971 uvesafb_device = platform_device_alloc("uvesafb", 0);
1972 if (uvesafb_device)
1973 err = platform_device_add(uvesafb_device);
1974 else
1975 err = -ENOMEM;
1976
1977 if (err) {
1978 platform_device_put(uvesafb_device);
1979 platform_driver_unregister(&uvesafb_driver);
1980 cn_del_callback(&uvesafb_cn_id);
1981 return err;
1982 }
1983
1984 err = driver_create_file(&uvesafb_driver.driver,
1985 &driver_attr_v86d);
1986 if (err) {
1987 printk(KERN_WARNING "uvesafb: failed to register "
1988 "attributes\n");
1989 err = 0;
1990 }
1991 }
1992 return err;
1993 }
1994
1995 module_init(uvesafb_init);
1996
1997 static void __devexit uvesafb_exit(void)
1998 {
1999 struct uvesafb_ktask *task;
2000
2001 if (v86d_started) {
2002 task = uvesafb_prep();
2003 if (task) {
2004 task->t.flags = TF_EXIT;
2005 uvesafb_exec(task);
2006 uvesafb_free(task);
2007 }
2008 }
2009
2010 cn_del_callback(&uvesafb_cn_id);
2011 driver_remove_file(&uvesafb_driver.driver, &driver_attr_v86d);
2012 platform_device_unregister(uvesafb_device);
2013 platform_driver_unregister(&uvesafb_driver);
2014 }
2015
2016 module_exit(uvesafb_exit);
2017
2018 static int param_set_scroll(const char *val, const struct kernel_param *kp)
2019 {
2020 ypan = 0;
2021
2022 if (!strcmp(val, "redraw"))
2023 ypan = 0;
2024 else if (!strcmp(val, "ypan"))
2025 ypan = 1;
2026 else if (!strcmp(val, "ywrap"))
2027 ypan = 2;
2028 else
2029 return -EINVAL;
2030
2031 return 0;
2032 }
2033 static struct kernel_param_ops param_ops_scroll = {
2034 .set = param_set_scroll,
2035 };
2036 #define param_check_scroll(name, p) __param_check(name, p, void)
2037
2038 module_param_named(scroll, ypan, scroll, 0);
2039 MODULE_PARM_DESC(scroll,
2040 "Scrolling mode, set to 'redraw', 'ypan', or 'ywrap'");
2041 module_param_named(vgapal, pmi_setpal, invbool, 0);
2042 MODULE_PARM_DESC(vgapal, "Set palette using VGA registers");
2043 module_param_named(pmipal, pmi_setpal, bool, 0);
2044 MODULE_PARM_DESC(pmipal, "Set palette using PMI calls");
2045 module_param(mtrr, uint, 0);
2046 MODULE_PARM_DESC(mtrr,
2047 "Memory Type Range Registers setting. Use 0 to disable.");
2048 module_param(blank, bool, 0);
2049 MODULE_PARM_DESC(blank, "Enable hardware blanking");
2050 module_param(nocrtc, bool, 0);
2051 MODULE_PARM_DESC(nocrtc, "Ignore CRTC timings when setting modes");
2052 module_param(noedid, bool, 0);
2053 MODULE_PARM_DESC(noedid,
2054 "Ignore EDID-provided monitor limits when setting modes");
2055 module_param(vram_remap, uint, 0);
2056 MODULE_PARM_DESC(vram_remap, "Set amount of video memory to be used [MiB]");
2057 module_param(vram_total, uint, 0);
2058 MODULE_PARM_DESC(vram_total, "Set total amount of video memoery [MiB]");
2059 module_param(maxclk, ushort, 0);
2060 MODULE_PARM_DESC(maxclk, "Maximum pixelclock [MHz], overrides EDID data");
2061 module_param(maxhf, ushort, 0);
2062 MODULE_PARM_DESC(maxhf,
2063 "Maximum horizontal frequency [kHz], overrides EDID data");
2064 module_param(maxvf, ushort, 0);
2065 MODULE_PARM_DESC(maxvf,
2066 "Maximum vertical frequency [Hz], overrides EDID data");
2067 module_param(mode_option, charp, 0);
2068 MODULE_PARM_DESC(mode_option,
2069 "Specify initial video mode as \"<xres>x<yres>[-<bpp>][@<refresh>]\"");
2070 module_param(vbemode, ushort, 0);
2071 MODULE_PARM_DESC(vbemode,
2072 "VBE mode number to set, overrides the 'mode' option");
2073 module_param_string(v86d, v86d_path, PATH_MAX, 0660);
2074 MODULE_PARM_DESC(v86d, "Path to the v86d userspace helper.");
2075
2076 MODULE_LICENSE("GPL");
2077 MODULE_AUTHOR("Michal Januszewski <spock@gentoo.org>");
2078 MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards");
2079
(deprecated) Btrfs devel tree