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Staging: comedi: Remove unioxx5_subd_priv typedef
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / video / uvesafb.c
blob0b370aebdbfd24d528cab7442d1983801b36b7c5
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 <video/edid.h>
22 #include <video/uvesafb.h>
23 #ifdef CONFIG_X86
24 #include <video/vga.h>
25 #endif
26 #ifdef CONFIG_MTRR
27 #include <asm/mtrr.h>
28 #endif
29 #include "edid.h"
30
31 static struct cb_id uvesafb_cn_id = {
32 .idx = CN_IDX_V86D,
33 .val = CN_VAL_V86D_UVESAFB
34 };
35 static char v86d_path[PATH_MAX] = "/sbin/v86d";
36 static char v86d_started; /* has v86d been started by uvesafb? */
37
38 static struct fb_fix_screeninfo uvesafb_fix __devinitdata = {
39 .id = "VESA VGA",
40 .type = FB_TYPE_PACKED_PIXELS,
41 .accel = FB_ACCEL_NONE,
42 .visual = FB_VISUAL_TRUECOLOR,
43 };
44
45 static int mtrr __devinitdata = 3; /* enable mtrr by default */
46 static int blank = 1; /* enable blanking by default */
47 static int ypan = 1; /* 0: scroll, 1: ypan, 2: ywrap */
48 static int pmi_setpal __devinitdata = 1; /* use PMI for palette changes */
49 static int nocrtc __devinitdata; /* ignore CRTC settings */
50 static int noedid __devinitdata; /* don't try DDC transfers */
51 static int vram_remap __devinitdata; /* set amt. of memory to be used */
52 static int vram_total __devinitdata; /* set total amount of memory */
53 static u16 maxclk __devinitdata; /* maximum pixel clock */
54 static u16 maxvf __devinitdata; /* maximum vertical frequency */
55 static u16 maxhf __devinitdata; /* maximum horizontal frequency */
56 static u16 vbemode __devinitdata; /* force use of a specific VBE mode */
57 static char *mode_option __devinitdata;
58
59 static struct uvesafb_ktask *uvfb_tasks[UVESAFB_TASKS_MAX];
60 static DEFINE_MUTEX(uvfb_lock);
61
62 /*
63 * A handler for replies from userspace.
64 *
65 * Make sure each message passes consistency checks and if it does,
66 * find the kernel part of the task struct, copy the registers and
67 * the buffer contents and then complete the task.
68 */
69 static void uvesafb_cn_callback(void *data)
70 {
71 struct cn_msg *msg = data;
72 struct uvesafb_task *utask;
73 struct uvesafb_ktask *task;
74
75 if (msg->seq >= UVESAFB_TASKS_MAX)
76 return;
77
78 mutex_lock(&uvfb_lock);
79 task = uvfb_tasks[msg->seq];
80
81 if (!task || msg->ack != task->ack) {
82 mutex_unlock(&uvfb_lock);
83 return;
84 }
85
86 utask = (struct uvesafb_task *)msg->data;
87
88 /* Sanity checks for the buffer length. */
89 if (task->t.buf_len < utask->buf_len ||
90 utask->buf_len > msg->len - sizeof(*utask)) {
91 mutex_unlock(&uvfb_lock);
92 return;
93 }
94
95 uvfb_tasks[msg->seq] = NULL;
96 mutex_unlock(&uvfb_lock);
97
98 memcpy(&task->t, utask, sizeof(*utask));
99
100 if (task->t.buf_len && task->buf)
101 memcpy(task->buf, utask + 1, task->t.buf_len);
102
103 complete(task->done);
104 return;
105 }
106
107 static int uvesafb_helper_start(void)
108 {
109 char *envp[] = {
110 "HOME=/",
111 "PATH=/sbin:/bin",
112 NULL,
113 };
114
115 char *argv[] = {
116 v86d_path,
117 NULL,
118 };
119
120 return call_usermodehelper(v86d_path, argv, envp, 1);
121 }
122
123 /*
124 * Execute a uvesafb task.
125 *
126 * Returns 0 if the task is executed successfully.
127 *
128 * A message sent to the userspace consists of the uvesafb_task
129 * struct and (optionally) a buffer. The uvesafb_task struct is
130 * a simplified version of uvesafb_ktask (its kernel counterpart)
131 * containing only the register values, flags and the length of
132 * the buffer.
133 *
134 * Each message is assigned a sequence number (increased linearly)
135 * and a random ack number. The sequence number is used as a key
136 * for the uvfb_tasks array which holds pointers to uvesafb_ktask
137 * structs for all requests.
138 */
139 static int uvesafb_exec(struct uvesafb_ktask *task)
140 {
141 static int seq;
142 struct cn_msg *m;
143 int err;
144 int len = sizeof(task->t) + task->t.buf_len;
145
146 /*
147 * Check whether the message isn't longer than the maximum
148 * allowed by connector.
149 */
150 if (sizeof(*m) + len > CONNECTOR_MAX_MSG_SIZE) {
151 printk(KERN_WARNING "uvesafb: message too long (%d), "
152 "can't execute task\n", (int)(sizeof(*m) + len));
153 return -E2BIG;
154 }
155
156 m = kzalloc(sizeof(*m) + len, GFP_KERNEL);
157 if (!m)
158 return -ENOMEM;
159
160 init_completion(task->done);
161
162 memcpy(&m->id, &uvesafb_cn_id, sizeof(m->id));
163 m->seq = seq;
164 m->len = len;
165 m->ack = random32();
166
167 /* uvesafb_task structure */
168 memcpy(m + 1, &task->t, sizeof(task->t));
169
170 /* Buffer */
171 memcpy((u8 *)(m + 1) + sizeof(task->t), task->buf, task->t.buf_len);
172
173 /*
174 * Save the message ack number so that we can find the kernel
175 * part of this task when a reply is received from userspace.
176 */
177 task->ack = m->ack;
178
179 mutex_lock(&uvfb_lock);
180
181 /* If all slots are taken -- bail out. */
182 if (uvfb_tasks[seq]) {
183 mutex_unlock(&uvfb_lock);
184 err = -EBUSY;
185 goto out;
186 }
187
188 /* Save a pointer to the kernel part of the task struct. */
189 uvfb_tasks[seq] = task;
190 mutex_unlock(&uvfb_lock);
191
192 err = cn_netlink_send(m, 0, GFP_KERNEL);
193 if (err == -ESRCH) {
194 /*
195 * Try to start the userspace helper if sending
196 * the request failed the first time.
197 */
198 err = uvesafb_helper_start();
199 if (err) {
200 printk(KERN_ERR "uvesafb: failed to execute %s\n",
201 v86d_path);
202 printk(KERN_ERR "uvesafb: make sure that the v86d "
203 "helper is installed and executable\n");
204 } else {
205 v86d_started = 1;
206 err = cn_netlink_send(m, 0, gfp_any());
207 if (err == -ENOBUFS)
208 err = 0;
209 }
210 } else if (err == -ENOBUFS)
211 err = 0;
212
213 if (!err && !(task->t.flags & TF_EXIT))
214 err = !wait_for_completion_timeout(task->done,
215 msecs_to_jiffies(UVESAFB_TIMEOUT));
216
217 mutex_lock(&uvfb_lock);
218 uvfb_tasks[seq] = NULL;
219 mutex_unlock(&uvfb_lock);
220
221 seq++;
222 if (seq >= UVESAFB_TASKS_MAX)
223 seq = 0;
224 out:
225 kfree(m);
226 return err;
227 }
228
229 /*
230 * Free a uvesafb_ktask struct.
231 */
232 static void uvesafb_free(struct uvesafb_ktask *task)
233 {
234 if (task) {
235 if (task->done)
236 kfree(task->done);
237 kfree(task);
238 }
239 }
240
241 /*
242 * Prepare a uvesafb_ktask struct to be used again.
243 */
244 static void uvesafb_reset(struct uvesafb_ktask *task)
245 {
246 struct completion *cpl = task->done;
247
248 memset(task, 0, sizeof(*task));
249 task->done = cpl;
250 }
251
252 /*
253 * Allocate and prepare a uvesafb_ktask struct.
254 */
255 static struct uvesafb_ktask *uvesafb_prep(void)
256 {
257 struct uvesafb_ktask *task;
258
259 task = kzalloc(sizeof(*task), GFP_KERNEL);
260 if (task) {
261 task->done = kzalloc(sizeof(*task->done), GFP_KERNEL);
262 if (!task->done) {
263 kfree(task);
264 task = NULL;
265 }
266 }
267 return task;
268 }
269
270 static void uvesafb_setup_var(struct fb_var_screeninfo *var,
271 struct fb_info *info, struct vbe_mode_ib *mode)
272 {
273 struct uvesafb_par *par = info->par;
274
275 var->vmode = FB_VMODE_NONINTERLACED;
276 var->sync = FB_SYNC_VERT_HIGH_ACT;
277
278 var->xres = mode->x_res;
279 var->yres = mode->y_res;
280 var->xres_virtual = mode->x_res;
281 var->yres_virtual = (par->ypan) ?
282 info->fix.smem_len / mode->bytes_per_scan_line :
283 mode->y_res;
284 var->xoffset = 0;
285 var->yoffset = 0;
286 var->bits_per_pixel = mode->bits_per_pixel;
287
288 if (var->bits_per_pixel == 15)
289 var->bits_per_pixel = 16;
290
291 if (var->bits_per_pixel > 8) {
292 var->red.offset = mode->red_off;
293 var->red.length = mode->red_len;
294 var->green.offset = mode->green_off;
295 var->green.length = mode->green_len;
296 var->blue.offset = mode->blue_off;
297 var->blue.length = mode->blue_len;
298 var->transp.offset = mode->rsvd_off;
299 var->transp.length = mode->rsvd_len;
300 } else {
301 var->red.offset = 0;
302 var->green.offset = 0;
303 var->blue.offset = 0;
304 var->transp.offset = 0;
305
306 /*
307 * We're assuming that we can switch the DAC to 8 bits. If
308 * this proves to be incorrect, we'll update the fields
309 * later in set_par().
310 */
311 if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC) {
312 var->red.length = 8;
313 var->green.length = 8;
314 var->blue.length = 8;
315 var->transp.length = 0;
316 } else {
317 var->red.length = 6;
318 var->green.length = 6;
319 var->blue.length = 6;
320 var->transp.length = 0;
321 }
322 }
323 }
324
325 static int uvesafb_vbe_find_mode(struct uvesafb_par *par,
326 int xres, int yres, int depth, unsigned char flags)
327 {
328 int i, match = -1, h = 0, d = 0x7fffffff;
329
330 for (i = 0; i < par->vbe_modes_cnt; i++) {
331 h = abs(par->vbe_modes[i].x_res - xres) +
332 abs(par->vbe_modes[i].y_res - yres) +
333 abs(depth - par->vbe_modes[i].depth);
334
335 /*
336 * We have an exact match in terms of resolution
337 * and depth.
338 */
339 if (h == 0)
340 return i;
341
342 if (h < d || (h == d && par->vbe_modes[i].depth > depth)) {
343 d = h;
344 match = i;
345 }
346 }
347 i = 1;
348
349 if (flags & UVESAFB_EXACT_DEPTH &&
350 par->vbe_modes[match].depth != depth)
351 i = 0;
352
353 if (flags & UVESAFB_EXACT_RES && d > 24)
354 i = 0;
355
356 if (i != 0)
357 return match;
358 else
359 return -1;
360 }
361
362 static u8 *uvesafb_vbe_state_save(struct uvesafb_par *par)
363 {
364 struct uvesafb_ktask *task;
365 u8 *state;
366 int err;
367
368 if (!par->vbe_state_size)
369 return NULL;
370
371 state = kmalloc(par->vbe_state_size, GFP_KERNEL);
372 if (!state)
373 return NULL;
374
375 task = uvesafb_prep();
376 if (!task) {
377 kfree(state);
378 return NULL;
379 }
380
381 task->t.regs.eax = 0x4f04;
382 task->t.regs.ecx = 0x000f;
383 task->t.regs.edx = 0x0001;
384 task->t.flags = TF_BUF_RET | TF_BUF_ESBX;
385 task->t.buf_len = par->vbe_state_size;
386 task->buf = state;
387 err = uvesafb_exec(task);
388
389 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
390 printk(KERN_WARNING "uvesafb: VBE get state call "
391 "failed (eax=0x%x, err=%d)\n",
392 task->t.regs.eax, err);
393 kfree(state);
394 state = NULL;
395 }
396
397 uvesafb_free(task);
398 return state;
399 }
400
401 static void uvesafb_vbe_state_restore(struct uvesafb_par *par, u8 *state_buf)
402 {
403 struct uvesafb_ktask *task;
404 int err;
405
406 if (!state_buf)
407 return;
408
409 task = uvesafb_prep();
410 if (!task)
411 return;
412
413 task->t.regs.eax = 0x4f04;
414 task->t.regs.ecx = 0x000f;
415 task->t.regs.edx = 0x0002;
416 task->t.buf_len = par->vbe_state_size;
417 task->t.flags = TF_BUF_ESBX;
418 task->buf = state_buf;
419
420 err = uvesafb_exec(task);
421 if (err || (task->t.regs.eax & 0xffff) != 0x004f)
422 printk(KERN_WARNING "uvesafb: VBE state restore call "
423 "failed (eax=0x%x, err=%d)\n",
424 task->t.regs.eax, err);
425
426 uvesafb_free(task);
427 }
428
429 static int __devinit uvesafb_vbe_getinfo(struct uvesafb_ktask *task,
430 struct uvesafb_par *par)
431 {
432 int err;
433
434 task->t.regs.eax = 0x4f00;
435 task->t.flags = TF_VBEIB;
436 task->t.buf_len = sizeof(struct vbe_ib);
437 task->buf = &par->vbe_ib;
438 strncpy(par->vbe_ib.vbe_signature, "VBE2", 4);
439
440 err = uvesafb_exec(task);
441 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
442 printk(KERN_ERR "uvesafb: Getting VBE info block failed "
443 "(eax=0x%x, err=%d)\n", (u32)task->t.regs.eax,
444 err);
445 return -EINVAL;
446 }
447
448 if (par->vbe_ib.vbe_version < 0x0200) {
449 printk(KERN_ERR "uvesafb: Sorry, pre-VBE 2.0 cards are "
450 "not supported.\n");
451 return -EINVAL;
452 }
453
454 if (!par->vbe_ib.mode_list_ptr) {
455 printk(KERN_ERR "uvesafb: Missing mode list!\n");
456 return -EINVAL;
457 }
458
459 printk(KERN_INFO "uvesafb: ");
460
461 /*
462 * Convert string pointers and the mode list pointer into
463 * usable addresses. Print informational messages about the
464 * video adapter and its vendor.
465 */
466 if (par->vbe_ib.oem_vendor_name_ptr)
467 printk("%s, ",
468 ((char *)task->buf) + par->vbe_ib.oem_vendor_name_ptr);
469
470 if (par->vbe_ib.oem_product_name_ptr)
471 printk("%s, ",
472 ((char *)task->buf) + par->vbe_ib.oem_product_name_ptr);
473
474 if (par->vbe_ib.oem_product_rev_ptr)
475 printk("%s, ",
476 ((char *)task->buf) + par->vbe_ib.oem_product_rev_ptr);
477
478 if (par->vbe_ib.oem_string_ptr)
479 printk("OEM: %s, ",
480 ((char *)task->buf) + par->vbe_ib.oem_string_ptr);
481
482 printk("VBE v%d.%d\n", ((par->vbe_ib.vbe_version & 0xff00) >> 8),
483 par->vbe_ib.vbe_version & 0xff);
484
485 return 0;
486 }
487
488 static int __devinit uvesafb_vbe_getmodes(struct uvesafb_ktask *task,
489 struct uvesafb_par *par)
490 {
491 int off = 0, err;
492 u16 *mode;
493
494 par->vbe_modes_cnt = 0;
495
496 /* Count available modes. */
497 mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
498 while (*mode != 0xffff) {
499 par->vbe_modes_cnt++;
500 mode++;
501 }
502
503 par->vbe_modes = kzalloc(sizeof(struct vbe_mode_ib) *
504 par->vbe_modes_cnt, GFP_KERNEL);
505 if (!par->vbe_modes)
506 return -ENOMEM;
507
508 /* Get info about all available modes. */
509 mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
510 while (*mode != 0xffff) {
511 struct vbe_mode_ib *mib;
512
513 uvesafb_reset(task);
514 task->t.regs.eax = 0x4f01;
515 task->t.regs.ecx = (u32) *mode;
516 task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
517 task->t.buf_len = sizeof(struct vbe_mode_ib);
518 task->buf = par->vbe_modes + off;
519
520 err = uvesafb_exec(task);
521 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
522 printk(KERN_WARNING "uvesafb: Getting mode info block "
523 "for mode 0x%x failed (eax=0x%x, err=%d)\n",
524 *mode, (u32)task->t.regs.eax, err);
525 mode++;
526 par->vbe_modes_cnt--;
527 continue;
528 }
529
530 mib = task->buf;
531 mib->mode_id = *mode;
532
533 /*
534 * We only want modes that are supported with the current
535 * hardware configuration, color, graphics and that have
536 * support for the LFB.
537 */
538 if ((mib->mode_attr & VBE_MODE_MASK) == VBE_MODE_MASK &&
539 mib->bits_per_pixel >= 8)
540 off++;
541 else
542 par->vbe_modes_cnt--;
543
544 mode++;
545 mib->depth = mib->red_len + mib->green_len + mib->blue_len;
546
547 /*
548 * Handle 8bpp modes and modes with broken color component
549 * lengths.
550 */
551 if (mib->depth == 0 || (mib->depth == 24 &&
552 mib->bits_per_pixel == 32))
553 mib->depth = mib->bits_per_pixel;
554 }
555
556 if (par->vbe_modes_cnt > 0)
557 return 0;
558 else
559 return -EINVAL;
560 }
561
562 /*
563 * The Protected Mode Interface is 32-bit x86 code, so we only run it on
564 * x86 and not x86_64.
565 */
566 #ifdef CONFIG_X86_32
567 static int __devinit uvesafb_vbe_getpmi(struct uvesafb_ktask *task,
568 struct uvesafb_par *par)
569 {
570 int i, err;
571
572 uvesafb_reset(task);
573 task->t.regs.eax = 0x4f0a;
574 task->t.regs.ebx = 0x0;
575 err = uvesafb_exec(task);
576
577 if ((task->t.regs.eax & 0xffff) != 0x4f || task->t.regs.es < 0xc000) {
578 par->pmi_setpal = par->ypan = 0;
579 } else {
580 par->pmi_base = (u16 *)phys_to_virt(((u32)task->t.regs.es << 4)
581 + task->t.regs.edi);
582 par->pmi_start = (u8 *)par->pmi_base + par->pmi_base[1];
583 par->pmi_pal = (u8 *)par->pmi_base + par->pmi_base[2];
584 printk(KERN_INFO "uvesafb: protected mode interface info at "
585 "%04x:%04x\n",
586 (u16)task->t.regs.es, (u16)task->t.regs.edi);
587 printk(KERN_INFO "uvesafb: pmi: set display start = %p, "
588 "set palette = %p\n", par->pmi_start,
589 par->pmi_pal);
590
591 if (par->pmi_base[3]) {
592 printk(KERN_INFO "uvesafb: pmi: ports = ");
593 for (i = par->pmi_base[3]/2;
594 par->pmi_base[i] != 0xffff; i++)
595 printk("%x ", par->pmi_base[i]);
596 printk("\n");
597
598 if (par->pmi_base[i] != 0xffff) {
599 printk(KERN_INFO "uvesafb: can't handle memory"
600 " requests, pmi disabled\n");
601 par->ypan = par->pmi_setpal = 0;
602 }
603 }
604 }
605 return 0;
606 }
607 #endif /* CONFIG_X86_32 */
608
609 /*
610 * Check whether a video mode is supported by the Video BIOS and is
611 * compatible with the monitor limits.
612 */
613 static int __devinit uvesafb_is_valid_mode(struct fb_videomode *mode,
614 struct fb_info *info)
615 {
616 if (info->monspecs.gtf) {
617 fb_videomode_to_var(&info->var, mode);
618 if (fb_validate_mode(&info->var, info))
619 return 0;
620 }
621
622 if (uvesafb_vbe_find_mode(info->par, mode->xres, mode->yres, 8,
623 UVESAFB_EXACT_RES) == -1)
624 return 0;
625
626 return 1;
627 }
628
629 static int __devinit uvesafb_vbe_getedid(struct uvesafb_ktask *task,
630 struct fb_info *info)
631 {
632 struct uvesafb_par *par = info->par;
633 int err = 0;
634
635 if (noedid || par->vbe_ib.vbe_version < 0x0300)
636 return -EINVAL;
637
638 task->t.regs.eax = 0x4f15;
639 task->t.regs.ebx = 0;
640 task->t.regs.ecx = 0;
641 task->t.buf_len = 0;
642 task->t.flags = 0;
643
644 err = uvesafb_exec(task);
645
646 if ((task->t.regs.eax & 0xffff) != 0x004f || err)
647 return -EINVAL;
648
649 if ((task->t.regs.ebx & 0x3) == 3) {
650 printk(KERN_INFO "uvesafb: VBIOS/hardware supports both "
651 "DDC1 and DDC2 transfers\n");
652 } else if ((task->t.regs.ebx & 0x3) == 2) {
653 printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC2 "
654 "transfers\n");
655 } else if ((task->t.regs.ebx & 0x3) == 1) {
656 printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC1 "
657 "transfers\n");
658 } else {
659 printk(KERN_INFO "uvesafb: VBIOS/hardware doesn't support "
660 "DDC transfers\n");
661 return -EINVAL;
662 }
663
664 task->t.regs.eax = 0x4f15;
665 task->t.regs.ebx = 1;
666 task->t.regs.ecx = task->t.regs.edx = 0;
667 task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
668 task->t.buf_len = EDID_LENGTH;
669 task->buf = kzalloc(EDID_LENGTH, GFP_KERNEL);
670
671 err = uvesafb_exec(task);
672
673 if ((task->t.regs.eax & 0xffff) == 0x004f && !err) {
674 fb_edid_to_monspecs(task->buf, &info->monspecs);
675
676 if (info->monspecs.vfmax && info->monspecs.hfmax) {
677 /*
678 * If the maximum pixel clock wasn't specified in
679 * the EDID block, set it to 300 MHz.
680 */
681 if (info->monspecs.dclkmax == 0)
682 info->monspecs.dclkmax = 300 * 1000000;
683 info->monspecs.gtf = 1;
684 }
685 } else {
686 err = -EINVAL;
687 }
688
689 kfree(task->buf);
690 return err;
691 }
692
693 static void __devinit uvesafb_vbe_getmonspecs(struct uvesafb_ktask *task,
694 struct fb_info *info)
695 {
696 struct uvesafb_par *par = info->par;
697 int i;
698
699 memset(&info->monspecs, 0, sizeof(info->monspecs));
700
701 /*
702 * If we don't get all necessary data from the EDID block,
703 * mark it as incompatible with the GTF and set nocrtc so
704 * that we always use the default BIOS refresh rate.
705 */
706 if (uvesafb_vbe_getedid(task, info)) {
707 info->monspecs.gtf = 0;
708 par->nocrtc = 1;
709 }
710
711 /* Kernel command line overrides. */
712 if (maxclk)
713 info->monspecs.dclkmax = maxclk * 1000000;
714 if (maxvf)
715 info->monspecs.vfmax = maxvf;
716 if (maxhf)
717 info->monspecs.hfmax = maxhf * 1000;
718
719 /*
720 * In case DDC transfers are not supported, the user can provide
721 * monitor limits manually. Lower limits are set to "safe" values.
722 */
723 if (info->monspecs.gtf == 0 && maxclk && maxvf && maxhf) {
724 info->monspecs.dclkmin = 0;
725 info->monspecs.vfmin = 60;
726 info->monspecs.hfmin = 29000;
727 info->monspecs.gtf = 1;
728 par->nocrtc = 0;
729 }
730
731 if (info->monspecs.gtf)
732 printk(KERN_INFO
733 "uvesafb: monitor limits: vf = %d Hz, hf = %d kHz, "
734 "clk = %d MHz\n", info->monspecs.vfmax,
735 (int)(info->monspecs.hfmax / 1000),
736 (int)(info->monspecs.dclkmax / 1000000));
737 else
738 printk(KERN_INFO "uvesafb: no monitor limits have been set, "
739 "default refresh rate will be used\n");
740
741 /* Add VBE modes to the modelist. */
742 for (i = 0; i < par->vbe_modes_cnt; i++) {
743 struct fb_var_screeninfo var;
744 struct vbe_mode_ib *mode;
745 struct fb_videomode vmode;
746
747 mode = &par->vbe_modes[i];
748 memset(&var, 0, sizeof(var));
749
750 var.xres = mode->x_res;
751 var.yres = mode->y_res;
752
753 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, &var, info);
754 fb_var_to_videomode(&vmode, &var);
755 fb_add_videomode(&vmode, &info->modelist);
756 }
757
758 /* Add valid VESA modes to our modelist. */
759 for (i = 0; i < VESA_MODEDB_SIZE; i++) {
760 if (uvesafb_is_valid_mode((struct fb_videomode *)
761 &vesa_modes[i], info))
762 fb_add_videomode(&vesa_modes[i], &info->modelist);
763 }
764
765 for (i = 0; i < info->monspecs.modedb_len; i++) {
766 if (uvesafb_is_valid_mode(&info->monspecs.modedb[i], info))
767 fb_add_videomode(&info->monspecs.modedb[i],
768 &info->modelist);
769 }
770
771 return;
772 }
773
774 static void __devinit uvesafb_vbe_getstatesize(struct uvesafb_ktask *task,
775 struct uvesafb_par *par)
776 {
777 int err;
778
779 uvesafb_reset(task);
780
781 /*
782 * Get the VBE state buffer size. We want all available
783 * hardware state data (CL = 0x0f).
784 */
785 task->t.regs.eax = 0x4f04;
786 task->t.regs.ecx = 0x000f;
787 task->t.regs.edx = 0x0000;
788 task->t.flags = 0;
789
790 err = uvesafb_exec(task);
791
792 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
793 printk(KERN_WARNING "uvesafb: VBE state buffer size "
794 "cannot be determined (eax=0x%x, err=%d)\n",
795 task->t.regs.eax, err);
796 par->vbe_state_size = 0;
797 return;
798 }
799
800 par->vbe_state_size = 64 * (task->t.regs.ebx & 0xffff);
801 }
802
803 static int __devinit uvesafb_vbe_init(struct fb_info *info)
804 {
805 struct uvesafb_ktask *task = NULL;
806 struct uvesafb_par *par = info->par;
807 int err;
808
809 task = uvesafb_prep();
810 if (!task)
811 return -ENOMEM;
812
813 err = uvesafb_vbe_getinfo(task, par);
814 if (err)
815 goto out;
816
817 err = uvesafb_vbe_getmodes(task, par);
818 if (err)
819 goto out;
820
821 par->nocrtc = nocrtc;
822 #ifdef CONFIG_X86_32
823 par->pmi_setpal = pmi_setpal;
824 par->ypan = ypan;
825
826 if (par->pmi_setpal || par->ypan)
827 uvesafb_vbe_getpmi(task, par);
828 #else
829 /* The protected mode interface is not available on non-x86. */
830 par->pmi_setpal = par->ypan = 0;
831 #endif
832
833 INIT_LIST_HEAD(&info->modelist);
834 uvesafb_vbe_getmonspecs(task, info);
835 uvesafb_vbe_getstatesize(task, par);
836
837 out: uvesafb_free(task);
838 return err;
839 }
840
841 static int __devinit uvesafb_vbe_init_mode(struct fb_info *info)
842 {
843 struct list_head *pos;
844 struct fb_modelist *modelist;
845 struct fb_videomode *mode;
846 struct uvesafb_par *par = info->par;
847 int i, modeid;
848
849 /* Has the user requested a specific VESA mode? */
850 if (vbemode) {
851 for (i = 0; i < par->vbe_modes_cnt; i++) {
852 if (par->vbe_modes[i].mode_id == vbemode) {
853 modeid = i;
854 uvesafb_setup_var(&info->var, info,
855 &par->vbe_modes[modeid]);
856 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
857 &info->var, info);
858 /*
859 * With pixclock set to 0, the default BIOS
860 * timings will be used in set_par().
861 */
862 info->var.pixclock = 0;
863 goto gotmode;
864 }
865 }
866 printk(KERN_INFO "uvesafb: requested VBE mode 0x%x is "
867 "unavailable\n", vbemode);
868 vbemode = 0;
869 }
870
871 /* Count the modes in the modelist */
872 i = 0;
873 list_for_each(pos, &info->modelist)
874 i++;
875
876 /*
877 * Convert the modelist into a modedb so that we can use it with
878 * fb_find_mode().
879 */
880 mode = kzalloc(i * sizeof(*mode), GFP_KERNEL);
881 if (mode) {
882 i = 0;
883 list_for_each(pos, &info->modelist) {
884 modelist = list_entry(pos, struct fb_modelist, list);
885 mode[i] = modelist->mode;
886 i++;
887 }
888
889 if (!mode_option)
890 mode_option = UVESAFB_DEFAULT_MODE;
891
892 i = fb_find_mode(&info->var, info, mode_option, mode, i,
893 NULL, 8);
894
895 kfree(mode);
896 }
897
898 /* fb_find_mode() failed */
899 if (i == 0) {
900 info->var.xres = 640;
901 info->var.yres = 480;
902 mode = (struct fb_videomode *)
903 fb_find_best_mode(&info->var, &info->modelist);
904
905 if (mode) {
906 fb_videomode_to_var(&info->var, mode);
907 } else {
908 modeid = par->vbe_modes[0].mode_id;
909 uvesafb_setup_var(&info->var, info,
910 &par->vbe_modes[modeid]);
911 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
912 &info->var, info);
913
914 goto gotmode;
915 }
916 }
917
918 /* Look for a matching VBE mode. */
919 modeid = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres,
920 info->var.bits_per_pixel, UVESAFB_EXACT_RES);
921
922 if (modeid == -1)
923 return -EINVAL;
924
925 uvesafb_setup_var(&info->var, info, &par->vbe_modes[modeid]);
926
927 gotmode:
928 /*
929 * If we are not VBE3.0+ compliant, we're done -- the BIOS will
930 * ignore our timings anyway.
931 */
932 if (par->vbe_ib.vbe_version < 0x0300 || par->nocrtc)
933 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
934 &info->var, info);
935
936 return modeid;
937 }
938
939 static int uvesafb_setpalette(struct uvesafb_pal_entry *entries, int count,
940 int start, struct fb_info *info)
941 {
942 struct uvesafb_ktask *task;
943 #ifdef CONFIG_X86
944 struct uvesafb_par *par = info->par;
945 int i = par->mode_idx;
946 #endif
947 int err = 0;
948
949 /*
950 * We support palette modifications for 8 bpp modes only, so
951 * there can never be more than 256 entries.
952 */
953 if (start + count > 256)
954 return -EINVAL;
955
956 #ifdef CONFIG_X86
957 /* Use VGA registers if mode is VGA-compatible. */
958 if (i >= 0 && i < par->vbe_modes_cnt &&
959 par->vbe_modes[i].mode_attr & VBE_MODE_VGACOMPAT) {
960 for (i = 0; i < count; i++) {
961 outb_p(start + i, dac_reg);
962 outb_p(entries[i].red, dac_val);
963 outb_p(entries[i].green, dac_val);
964 outb_p(entries[i].blue, dac_val);
965 }
966 }
967 #ifdef CONFIG_X86_32
968 else if (par->pmi_setpal) {
969 __asm__ __volatile__(
970 "call *(%%esi)"
971 : /* no return value */
972 : "a" (0x4f09), /* EAX */
973 "b" (0), /* EBX */
974 "c" (count), /* ECX */
975 "d" (start), /* EDX */
976 "D" (entries), /* EDI */
977 "S" (&par->pmi_pal)); /* ESI */
978 }
979 #endif /* CONFIG_X86_32 */
980 else
981 #endif /* CONFIG_X86 */
982 {
983 task = uvesafb_prep();
984 if (!task)
985 return -ENOMEM;
986
987 task->t.regs.eax = 0x4f09;
988 task->t.regs.ebx = 0x0;
989 task->t.regs.ecx = count;
990 task->t.regs.edx = start;
991 task->t.flags = TF_BUF_ESDI;
992 task->t.buf_len = sizeof(struct uvesafb_pal_entry) * count;
993 task->buf = entries;
994
995 err = uvesafb_exec(task);
996 if ((task->t.regs.eax & 0xffff) != 0x004f)
997 err = 1;
998
999 uvesafb_free(task);
1000 }
1001 return err;
1002 }
1003
1004 static int uvesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
1005 unsigned blue, unsigned transp,
1006 struct fb_info *info)
1007 {
1008 struct uvesafb_pal_entry entry;
1009 int shift = 16 - info->var.green.length;
1010 int err = 0;
1011
1012 if (regno >= info->cmap.len)
1013 return -EINVAL;
1014
1015 if (info->var.bits_per_pixel == 8) {
1016 entry.red = red >> shift;
1017 entry.green = green >> shift;
1018 entry.blue = blue >> shift;
1019 entry.pad = 0;
1020
1021 err = uvesafb_setpalette(&entry, 1, regno, info);
1022 } else if (regno < 16) {
1023 switch (info->var.bits_per_pixel) {
1024 case 16:
1025 if (info->var.red.offset == 10) {
1026 /* 1:5:5:5 */
1027 ((u32 *) (info->pseudo_palette))[regno] =
1028 ((red & 0xf800) >> 1) |
1029 ((green & 0xf800) >> 6) |
1030 ((blue & 0xf800) >> 11);
1031 } else {
1032 /* 0:5:6:5 */
1033 ((u32 *) (info->pseudo_palette))[regno] =
1034 ((red & 0xf800) ) |
1035 ((green & 0xfc00) >> 5) |
1036 ((blue & 0xf800) >> 11);
1037 }
1038 break;
1039
1040 case 24:
1041 case 32:
1042 red >>= 8;
1043 green >>= 8;
1044 blue >>= 8;
1045 ((u32 *)(info->pseudo_palette))[regno] =
1046 (red << info->var.red.offset) |
1047 (green << info->var.green.offset) |
1048 (blue << info->var.blue.offset);
1049 break;
1050 }
1051 }
1052 return err;
1053 }
1054
1055 static int uvesafb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
1056 {
1057 struct uvesafb_pal_entry *entries;
1058 int shift = 16 - info->var.green.length;
1059 int i, err = 0;
1060
1061 if (info->var.bits_per_pixel == 8) {
1062 if (cmap->start + cmap->len > info->cmap.start +
1063 info->cmap.len || cmap->start < info->cmap.start)
1064 return -EINVAL;
1065
1066 entries = kmalloc(sizeof(*entries) * cmap->len, GFP_KERNEL);
1067 if (!entries)
1068 return -ENOMEM;
1069
1070 for (i = 0; i < cmap->len; i++) {
1071 entries[i].red = cmap->red[i] >> shift;
1072 entries[i].green = cmap->green[i] >> shift;
1073 entries[i].blue = cmap->blue[i] >> shift;
1074 entries[i].pad = 0;
1075 }
1076 err = uvesafb_setpalette(entries, cmap->len, cmap->start, info);
1077 kfree(entries);
1078 } else {
1079 /*
1080 * For modes with bpp > 8, we only set the pseudo palette in
1081 * the fb_info struct. We rely on uvesafb_setcolreg to do all
1082 * sanity checking.
1083 */
1084 for (i = 0; i < cmap->len; i++) {
1085 err |= uvesafb_setcolreg(cmap->start + i, cmap->red[i],
1086 cmap->green[i], cmap->blue[i],
1087 0, info);
1088 }
1089 }
1090 return err;
1091 }
1092
1093 static int uvesafb_pan_display(struct fb_var_screeninfo *var,
1094 struct fb_info *info)
1095 {
1096 #ifdef CONFIG_X86_32
1097 int offset;
1098 struct uvesafb_par *par = info->par;
1099
1100 offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;
1101
1102 /*
1103 * It turns out it's not the best idea to do panning via vm86,
1104 * so we only allow it if we have a PMI.
1105 */
1106 if (par->pmi_start) {
1107 __asm__ __volatile__(
1108 "call *(%%edi)"
1109 : /* no return value */
1110 : "a" (0x4f07), /* EAX */
1111 "b" (0), /* EBX */
1112 "c" (offset), /* ECX */
1113 "d" (offset >> 16), /* EDX */
1114 "D" (&par->pmi_start)); /* EDI */
1115 }
1116 #endif
1117 return 0;
1118 }
1119
1120 static int uvesafb_blank(int blank, struct fb_info *info)
1121 {
1122 struct uvesafb_ktask *task;
1123 int err = 1;
1124 #ifdef CONFIG_X86
1125 struct uvesafb_par *par = info->par;
1126
1127 if (par->vbe_ib.capabilities & VBE_CAP_VGACOMPAT) {
1128 int loop = 10000;
1129 u8 seq = 0, crtc17 = 0;
1130
1131 if (blank == FB_BLANK_POWERDOWN) {
1132 seq = 0x20;
1133 crtc17 = 0x00;
1134 err = 0;
1135 } else {
1136 seq = 0x00;
1137 crtc17 = 0x80;
1138 err = (blank == FB_BLANK_UNBLANK) ? 0 : -EINVAL;
1139 }
1140
1141 vga_wseq(NULL, 0x00, 0x01);
1142 seq |= vga_rseq(NULL, 0x01) & ~0x20;
1143 vga_wseq(NULL, 0x00, seq);
1144
1145 crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80;
1146 while (loop--);
1147 vga_wcrt(NULL, 0x17, crtc17);
1148 vga_wseq(NULL, 0x00, 0x03);
1149 } else
1150 #endif /* CONFIG_X86 */
1151 {
1152 task = uvesafb_prep();
1153 if (!task)
1154 return -ENOMEM;
1155
1156 task->t.regs.eax = 0x4f10;
1157 switch (blank) {
1158 case FB_BLANK_UNBLANK:
1159 task->t.regs.ebx = 0x0001;
1160 break;
1161 case FB_BLANK_NORMAL:
1162 task->t.regs.ebx = 0x0101; /* standby */
1163 break;
1164 case FB_BLANK_POWERDOWN:
1165 task->t.regs.ebx = 0x0401; /* powerdown */
1166 break;
1167 default:
1168 goto out;
1169 }
1170
1171 err = uvesafb_exec(task);
1172 if (err || (task->t.regs.eax & 0xffff) != 0x004f)
1173 err = 1;
1174 out: uvesafb_free(task);
1175 }
1176 return err;
1177 }
1178
1179 static int uvesafb_open(struct fb_info *info, int user)
1180 {
1181 struct uvesafb_par *par = info->par;
1182 int cnt = atomic_read(&par->ref_count);
1183
1184 if (!cnt && par->vbe_state_size)
1185 par->vbe_state_orig = uvesafb_vbe_state_save(par);
1186
1187 atomic_inc(&par->ref_count);
1188 return 0;
1189 }
1190
1191 static int uvesafb_release(struct fb_info *info, int user)
1192 {
1193 struct uvesafb_ktask *task = NULL;
1194 struct uvesafb_par *par = info->par;
1195 int cnt = atomic_read(&par->ref_count);
1196
1197 if (!cnt)
1198 return -EINVAL;
1199
1200 if (cnt != 1)
1201 goto out;
1202
1203 task = uvesafb_prep();
1204 if (!task)
1205 goto out;
1206
1207 /* First, try to set the standard 80x25 text mode. */
1208 task->t.regs.eax = 0x0003;
1209 uvesafb_exec(task);
1210
1211 /*
1212 * Now try to restore whatever hardware state we might have
1213 * saved when the fb device was first opened.
1214 */
1215 uvesafb_vbe_state_restore(par, par->vbe_state_orig);
1216 out:
1217 atomic_dec(&par->ref_count);
1218 if (task)
1219 uvesafb_free(task);
1220 return 0;
1221 }
1222
1223 static int uvesafb_set_par(struct fb_info *info)
1224 {
1225 struct uvesafb_par *par = info->par;
1226 struct uvesafb_ktask *task = NULL;
1227 struct vbe_crtc_ib *crtc = NULL;
1228 struct vbe_mode_ib *mode = NULL;
1229 int i, err = 0, depth = info->var.bits_per_pixel;
1230
1231 if (depth > 8 && depth != 32)
1232 depth = info->var.red.length + info->var.green.length +
1233 info->var.blue.length;
1234
1235 i = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, depth,
1236 UVESAFB_EXACT_RES | UVESAFB_EXACT_DEPTH);
1237 if (i >= 0)
1238 mode = &par->vbe_modes[i];
1239 else
1240 return -EINVAL;
1241
1242 task = uvesafb_prep();
1243 if (!task)
1244 return -ENOMEM;
1245 setmode:
1246 task->t.regs.eax = 0x4f02;
1247 task->t.regs.ebx = mode->mode_id | 0x4000; /* use LFB */
1248
1249 if (par->vbe_ib.vbe_version >= 0x0300 && !par->nocrtc &&
1250 info->var.pixclock != 0) {
1251 task->t.regs.ebx |= 0x0800; /* use CRTC data */
1252 task->t.flags = TF_BUF_ESDI;
1253 crtc = kzalloc(sizeof(struct vbe_crtc_ib), GFP_KERNEL);
1254 if (!crtc) {
1255 err = -ENOMEM;
1256 goto out;
1257 }
1258 crtc->horiz_start = info->var.xres + info->var.right_margin;
1259 crtc->horiz_end = crtc->horiz_start + info->var.hsync_len;
1260 crtc->horiz_total = crtc->horiz_end + info->var.left_margin;
1261
1262 crtc->vert_start = info->var.yres + info->var.lower_margin;
1263 crtc->vert_end = crtc->vert_start + info->var.vsync_len;
1264 crtc->vert_total = crtc->vert_end + info->var.upper_margin;
1265
1266 crtc->pixel_clock = PICOS2KHZ(info->var.pixclock) * 1000;
1267 crtc->refresh_rate = (u16)(100 * (crtc->pixel_clock /
1268 (crtc->vert_total * crtc->horiz_total)));
1269
1270 if (info->var.vmode & FB_VMODE_DOUBLE)
1271 crtc->flags |= 0x1;
1272 if (info->var.vmode & FB_VMODE_INTERLACED)
1273 crtc->flags |= 0x2;
1274 if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
1275 crtc->flags |= 0x4;
1276 if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
1277 crtc->flags |= 0x8;
1278 memcpy(&par->crtc, crtc, sizeof(*crtc));
1279 } else {
1280 memset(&par->crtc, 0, sizeof(*crtc));
1281 }
1282
1283 task->t.buf_len = sizeof(struct vbe_crtc_ib);
1284 task->buf = &par->crtc;
1285
1286 err = uvesafb_exec(task);
1287 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
1288 /*
1289 * The mode switch might have failed because we tried to
1290 * use our own timings. Try again with the default timings.
1291 */
1292 if (crtc != NULL) {
1293 printk(KERN_WARNING "uvesafb: mode switch failed "
1294 "(eax=0x%x, err=%d). Trying again with "
1295 "default timings.\n", task->t.regs.eax, err);
1296 uvesafb_reset(task);
1297 kfree(crtc);
1298 crtc = NULL;
1299 info->var.pixclock = 0;
1300 goto setmode;
1301 } else {
1302 printk(KERN_ERR "uvesafb: mode switch failed (eax="
1303 "0x%x, err=%d)\n", task->t.regs.eax, err);
1304 err = -EINVAL;
1305 goto out;
1306 }
1307 }
1308 par->mode_idx = i;
1309
1310 /* For 8bpp modes, always try to set the DAC to 8 bits. */
1311 if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC &&
1312 mode->bits_per_pixel <= 8) {
1313 uvesafb_reset(task);
1314 task->t.regs.eax = 0x4f08;
1315 task->t.regs.ebx = 0x0800;
1316
1317 err = uvesafb_exec(task);
1318 if (err || (task->t.regs.eax & 0xffff) != 0x004f ||
1319 ((task->t.regs.ebx & 0xff00) >> 8) != 8) {
1320 /*
1321 * We've failed to set the DAC palette format -
1322 * time to correct var.
1323 */
1324 info->var.red.length = 6;
1325 info->var.green.length = 6;
1326 info->var.blue.length = 6;
1327 }
1328 }
1329
1330 info->fix.visual = (info->var.bits_per_pixel == 8) ?
1331 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
1332 info->fix.line_length = mode->bytes_per_scan_line;
1333
1334 out: if (crtc != NULL)
1335 kfree(crtc);
1336 uvesafb_free(task);
1337
1338 return err;
1339 }
1340
1341 static void uvesafb_check_limits(struct fb_var_screeninfo *var,
1342 struct fb_info *info)
1343 {
1344 const struct fb_videomode *mode;
1345 struct uvesafb_par *par = info->par;
1346
1347 /*
1348 * If pixclock is set to 0, then we're using default BIOS timings
1349 * and thus don't have to perform any checks here.
1350 */
1351 if (!var->pixclock)
1352 return;
1353
1354 if (par->vbe_ib.vbe_version < 0x0300) {
1355 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, var, info);
1356 return;
1357 }
1358
1359 if (!fb_validate_mode(var, info))
1360 return;
1361
1362 mode = fb_find_best_mode(var, &info->modelist);
1363 if (mode) {
1364 if (mode->xres == var->xres && mode->yres == var->yres &&
1365 !(mode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))) {
1366 fb_videomode_to_var(var, mode);
1367 return;
1368 }
1369 }
1370
1371 if (info->monspecs.gtf && !fb_get_mode(FB_MAXTIMINGS, 0, var, info))
1372 return;
1373 /* Use default refresh rate */
1374 var->pixclock = 0;
1375 }
1376
1377 static int uvesafb_check_var(struct fb_var_screeninfo *var,
1378 struct fb_info *info)
1379 {
1380 struct uvesafb_par *par = info->par;
1381 struct vbe_mode_ib *mode = NULL;
1382 int match = -1;
1383 int depth = var->red.length + var->green.length + var->blue.length;
1384
1385 /*
1386 * Various apps will use bits_per_pixel to set the color depth,
1387 * which is theoretically incorrect, but which we'll try to handle
1388 * here.
1389 */
1390 if (depth == 0 || abs(depth - var->bits_per_pixel) >= 8)
1391 depth = var->bits_per_pixel;
1392
1393 match = uvesafb_vbe_find_mode(par, var->xres, var->yres, depth,
1394 UVESAFB_EXACT_RES);
1395 if (match == -1)
1396 return -EINVAL;
1397
1398 mode = &par->vbe_modes[match];
1399 uvesafb_setup_var(var, info, mode);
1400
1401 /*
1402 * Check whether we have remapped enough memory for this mode.
1403 * We might be called at an early stage, when we haven't remapped
1404 * any memory yet, in which case we simply skip the check.
1405 */
1406 if (var->yres * mode->bytes_per_scan_line > info->fix.smem_len
1407 && info->fix.smem_len)
1408 return -EINVAL;
1409
1410 if ((var->vmode & FB_VMODE_DOUBLE) &&
1411 !(par->vbe_modes[match].mode_attr & 0x100))
1412 var->vmode &= ~FB_VMODE_DOUBLE;
1413
1414 if ((var->vmode & FB_VMODE_INTERLACED) &&
1415 !(par->vbe_modes[match].mode_attr & 0x200))
1416 var->vmode &= ~FB_VMODE_INTERLACED;
1417
1418 uvesafb_check_limits(var, info);
1419
1420 var->xres_virtual = var->xres;
1421 var->yres_virtual = (par->ypan) ?
1422 info->fix.smem_len / mode->bytes_per_scan_line :
1423 var->yres;
1424 return 0;
1425 }
1426
1427 static void uvesafb_save_state(struct fb_info *info)
1428 {
1429 struct uvesafb_par *par = info->par;
1430
1431 if (par->vbe_state_saved)
1432 kfree(par->vbe_state_saved);
1433
1434 par->vbe_state_saved = uvesafb_vbe_state_save(par);
1435 }
1436
1437 static void uvesafb_restore_state(struct fb_info *info)
1438 {
1439 struct uvesafb_par *par = info->par;
1440
1441 uvesafb_vbe_state_restore(par, par->vbe_state_saved);
1442 }
1443
1444 static struct fb_ops uvesafb_ops = {
1445 .owner = THIS_MODULE,
1446 .fb_open = uvesafb_open,
1447 .fb_release = uvesafb_release,
1448 .fb_setcolreg = uvesafb_setcolreg,
1449 .fb_setcmap = uvesafb_setcmap,
1450 .fb_pan_display = uvesafb_pan_display,
1451 .fb_blank = uvesafb_blank,
1452 .fb_fillrect = cfb_fillrect,
1453 .fb_copyarea = cfb_copyarea,
1454 .fb_imageblit = cfb_imageblit,
1455 .fb_check_var = uvesafb_check_var,
1456 .fb_set_par = uvesafb_set_par,
1457 .fb_save_state = uvesafb_save_state,
1458 .fb_restore_state = uvesafb_restore_state,
1459 };
1460
1461 static void __devinit uvesafb_init_info(struct fb_info *info,
1462 struct vbe_mode_ib *mode)
1463 {
1464 unsigned int size_vmode;
1465 unsigned int size_remap;
1466 unsigned int size_total;
1467 struct uvesafb_par *par = info->par;
1468 int i, h;
1469
1470 info->pseudo_palette = ((u8 *)info->par + sizeof(struct uvesafb_par));
1471 info->fix = uvesafb_fix;
1472 info->fix.ypanstep = par->ypan ? 1 : 0;
1473 info->fix.ywrapstep = (par->ypan > 1) ? 1 : 0;
1474
1475 /*
1476 * If we were unable to get the state buffer size, disable
1477 * functions for saving and restoring the hardware state.
1478 */
1479 if (par->vbe_state_size == 0) {
1480 info->fbops->fb_save_state = NULL;
1481 info->fbops->fb_restore_state = NULL;
1482 }
1483
1484 /* Disable blanking if the user requested so. */
1485 if (!blank)
1486 info->fbops->fb_blank = NULL;
1487
1488 /*
1489 * Find out how much IO memory is required for the mode with
1490 * the highest resolution.
1491 */
1492 size_remap = 0;
1493 for (i = 0; i < par->vbe_modes_cnt; i++) {
1494 h = par->vbe_modes[i].bytes_per_scan_line *
1495 par->vbe_modes[i].y_res;
1496 if (h > size_remap)
1497 size_remap = h;
1498 }
1499 size_remap *= 2;
1500
1501 /*
1502 * size_vmode -- that is the amount of memory needed for the
1503 * used video mode, i.e. the minimum amount of
1504 * memory we need.
1505 */
1506 if (mode != NULL) {
1507 size_vmode = info->var.yres * mode->bytes_per_scan_line;
1508 } else {
1509 size_vmode = info->var.yres * info->var.xres *
1510 ((info->var.bits_per_pixel + 7) >> 3);
1511 }
1512
1513 /*
1514 * size_total -- all video memory we have. Used for mtrr
1515 * entries, resource allocation and bounds
1516 * checking.
1517 */
1518 size_total = par->vbe_ib.total_memory * 65536;
1519 if (vram_total)
1520 size_total = vram_total * 1024 * 1024;
1521 if (size_total < size_vmode)
1522 size_total = size_vmode;
1523
1524 /*
1525 * size_remap -- the amount of video memory we are going to
1526 * use for vesafb. With modern cards it is no
1527 * option to simply use size_total as th
1528 * wastes plenty of kernel address space.
1529 */
1530 if (vram_remap)
1531 size_remap = vram_remap * 1024 * 1024;
1532 if (size_remap < size_vmode)
1533 size_remap = size_vmode;
1534 if (size_remap > size_total)
1535 size_remap = size_total;
1536
1537 info->fix.smem_len = size_remap;
1538 info->fix.smem_start = mode->phys_base_ptr;
1539
1540 /*
1541 * We have to set yres_virtual here because when setup_var() was
1542 * called, smem_len wasn't defined yet.
1543 */
1544 info->var.yres_virtual = info->fix.smem_len /
1545 mode->bytes_per_scan_line;
1546
1547 if (par->ypan && info->var.yres_virtual > info->var.yres) {
1548 printk(KERN_INFO "uvesafb: scrolling: %s "
1549 "using protected mode interface, "
1550 "yres_virtual=%d\n",
1551 (par->ypan > 1) ? "ywrap" : "ypan",
1552 info->var.yres_virtual);
1553 } else {
1554 printk(KERN_INFO "uvesafb: scrolling: redraw\n");
1555 info->var.yres_virtual = info->var.yres;
1556 par->ypan = 0;
1557 }
1558
1559 info->flags = FBINFO_FLAG_DEFAULT |
1560 (par->ypan ? FBINFO_HWACCEL_YPAN : 0);
1561
1562 if (!par->ypan)
1563 info->fbops->fb_pan_display = NULL;
1564 }
1565
1566 static void __devinit uvesafb_init_mtrr(struct fb_info *info)
1567 {
1568 #ifdef CONFIG_MTRR
1569 if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) {
1570 int temp_size = info->fix.smem_len;
1571 unsigned int type = 0;
1572
1573 switch (mtrr) {
1574 case 1:
1575 type = MTRR_TYPE_UNCACHABLE;
1576 break;
1577 case 2:
1578 type = MTRR_TYPE_WRBACK;
1579 break;
1580 case 3:
1581 type = MTRR_TYPE_WRCOMB;
1582 break;
1583 case 4:
1584 type = MTRR_TYPE_WRTHROUGH;
1585 break;
1586 default:
1587 type = 0;
1588 break;
1589 }
1590
1591 if (type) {
1592 int rc;
1593
1594 /* Find the largest power-of-two */
1595 while (temp_size & (temp_size - 1))
1596 temp_size &= (temp_size - 1);
1597
1598 /* Try and find a power of two to add */
1599 do {
1600 rc = mtrr_add(info->fix.smem_start,
1601 temp_size, type, 1);
1602 temp_size >>= 1;
1603 } while (temp_size >= PAGE_SIZE && rc == -EINVAL);
1604 }
1605 }
1606 #endif /* CONFIG_MTRR */
1607 }
1608
1609
1610 static ssize_t uvesafb_show_vbe_ver(struct device *dev,
1611 struct device_attribute *attr, char *buf)
1612 {
1613 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1614 struct uvesafb_par *par = info->par;
1615
1616 return snprintf(buf, PAGE_SIZE, "%.4x\n", par->vbe_ib.vbe_version);
1617 }
1618
1619 static DEVICE_ATTR(vbe_version, S_IRUGO, uvesafb_show_vbe_ver, NULL);
1620
1621 static ssize_t uvesafb_show_vbe_modes(struct device *dev,
1622 struct device_attribute *attr, char *buf)
1623 {
1624 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1625 struct uvesafb_par *par = info->par;
1626 int ret = 0, i;
1627
1628 for (i = 0; i < par->vbe_modes_cnt && ret < PAGE_SIZE; i++) {
1629 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1630 "%dx%d-%d, 0x%.4x\n",
1631 par->vbe_modes[i].x_res, par->vbe_modes[i].y_res,
1632 par->vbe_modes[i].depth, par->vbe_modes[i].mode_id);
1633 }
1634
1635 return ret;
1636 }
1637
1638 static DEVICE_ATTR(vbe_modes, S_IRUGO, uvesafb_show_vbe_modes, NULL);
1639
1640 static ssize_t uvesafb_show_vendor(struct device *dev,
1641 struct device_attribute *attr, char *buf)
1642 {
1643 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1644 struct uvesafb_par *par = info->par;
1645
1646 if (par->vbe_ib.oem_vendor_name_ptr)
1647 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1648 (&par->vbe_ib) + par->vbe_ib.oem_vendor_name_ptr);
1649 else
1650 return 0;
1651 }
1652
1653 static DEVICE_ATTR(oem_vendor, S_IRUGO, uvesafb_show_vendor, NULL);
1654
1655 static ssize_t uvesafb_show_product_name(struct device *dev,
1656 struct device_attribute *attr, char *buf)
1657 {
1658 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1659 struct uvesafb_par *par = info->par;
1660
1661 if (par->vbe_ib.oem_product_name_ptr)
1662 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1663 (&par->vbe_ib) + par->vbe_ib.oem_product_name_ptr);
1664 else
1665 return 0;
1666 }
1667
1668 static DEVICE_ATTR(oem_product_name, S_IRUGO, uvesafb_show_product_name, NULL);
1669
1670 static ssize_t uvesafb_show_product_rev(struct device *dev,
1671 struct device_attribute *attr, char *buf)
1672 {
1673 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1674 struct uvesafb_par *par = info->par;
1675
1676 if (par->vbe_ib.oem_product_rev_ptr)
1677 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1678 (&par->vbe_ib) + par->vbe_ib.oem_product_rev_ptr);
1679 else
1680 return 0;
1681 }
1682
1683 static DEVICE_ATTR(oem_product_rev, S_IRUGO, uvesafb_show_product_rev, NULL);
1684
1685 static ssize_t uvesafb_show_oem_string(struct device *dev,
1686 struct device_attribute *attr, char *buf)
1687 {
1688 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1689 struct uvesafb_par *par = info->par;
1690
1691 if (par->vbe_ib.oem_string_ptr)
1692 return snprintf(buf, PAGE_SIZE, "%s\n",
1693 (char *)(&par->vbe_ib) + par->vbe_ib.oem_string_ptr);
1694 else
1695 return 0;
1696 }
1697
1698 static DEVICE_ATTR(oem_string, S_IRUGO, uvesafb_show_oem_string, NULL);
1699
1700 static ssize_t uvesafb_show_nocrtc(struct device *dev,
1701 struct device_attribute *attr, char *buf)
1702 {
1703 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1704 struct uvesafb_par *par = info->par;
1705
1706 return snprintf(buf, PAGE_SIZE, "%d\n", par->nocrtc);
1707 }
1708
1709 static ssize_t uvesafb_store_nocrtc(struct device *dev,
1710 struct device_attribute *attr, const char *buf, size_t count)
1711 {
1712 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1713 struct uvesafb_par *par = info->par;
1714
1715 if (count > 0) {
1716 if (buf[0] == '0')
1717 par->nocrtc = 0;
1718 else
1719 par->nocrtc = 1;
1720 }
1721 return count;
1722 }
1723
1724 static DEVICE_ATTR(nocrtc, S_IRUGO | S_IWUSR, uvesafb_show_nocrtc,
1725 uvesafb_store_nocrtc);
1726
1727 static struct attribute *uvesafb_dev_attrs[] = {
1728 &dev_attr_vbe_version.attr,
1729 &dev_attr_vbe_modes.attr,
1730 &dev_attr_oem_vendor.attr,
1731 &dev_attr_oem_product_name.attr,
1732 &dev_attr_oem_product_rev.attr,
1733 &dev_attr_oem_string.attr,
1734 &dev_attr_nocrtc.attr,
1735 NULL,
1736 };
1737
1738 static struct attribute_group uvesafb_dev_attgrp = {
1739 .name = NULL,
1740 .attrs = uvesafb_dev_attrs,
1741 };
1742
1743 static int __devinit uvesafb_probe(struct platform_device *dev)
1744 {
1745 struct fb_info *info;
1746 struct vbe_mode_ib *mode = NULL;
1747 struct uvesafb_par *par;
1748 int err = 0, i;
1749
1750 info = framebuffer_alloc(sizeof(*par) + sizeof(u32) * 256, &dev->dev);
1751 if (!info)
1752 return -ENOMEM;
1753
1754 par = info->par;
1755
1756 err = uvesafb_vbe_init(info);
1757 if (err) {
1758 printk(KERN_ERR "uvesafb: vbe_init() failed with %d\n", err);
1759 goto out;
1760 }
1761
1762 info->fbops = &uvesafb_ops;
1763
1764 i = uvesafb_vbe_init_mode(info);
1765 if (i < 0) {
1766 err = -EINVAL;
1767 goto out;
1768 } else {
1769 mode = &par->vbe_modes[i];
1770 }
1771
1772 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
1773 err = -ENXIO;
1774 goto out;
1775 }
1776
1777 uvesafb_init_info(info, mode);
1778
1779 if (!request_mem_region(info->fix.smem_start, info->fix.smem_len,
1780 "uvesafb")) {
1781 printk(KERN_ERR "uvesafb: cannot reserve video memory at "
1782 "0x%lx\n", info->fix.smem_start);
1783 err = -EIO;
1784 goto out_mode;
1785 }
1786
1787 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
1788
1789 if (!info->screen_base) {
1790 printk(KERN_ERR
1791 "uvesafb: abort, cannot ioremap 0x%x bytes of video "
1792 "memory at 0x%lx\n",
1793 info->fix.smem_len, info->fix.smem_start);
1794 err = -EIO;
1795 goto out_mem;
1796 }
1797
1798 if (!request_region(0x3c0, 32, "uvesafb")) {
1799 printk(KERN_ERR "uvesafb: request region 0x3c0-0x3e0 failed\n");
1800 err = -EIO;
1801 goto out_unmap;
1802 }
1803
1804 uvesafb_init_mtrr(info);
1805 platform_set_drvdata(dev, info);
1806
1807 if (register_framebuffer(info) < 0) {
1808 printk(KERN_ERR
1809 "uvesafb: failed to register framebuffer device\n");
1810 err = -EINVAL;
1811 goto out_reg;
1812 }
1813
1814 printk(KERN_INFO "uvesafb: framebuffer at 0x%lx, mapped to 0x%p, "
1815 "using %dk, total %dk\n", info->fix.smem_start,
1816 info->screen_base, info->fix.smem_len/1024,
1817 par->vbe_ib.total_memory * 64);
1818 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
1819 info->fix.id);
1820
1821 err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1822 if (err != 0)
1823 printk(KERN_WARNING "fb%d: failed to register attributes\n",
1824 info->node);
1825
1826 return 0;
1827
1828 out_reg:
1829 release_region(0x3c0, 32);
1830 out_unmap:
1831 iounmap(info->screen_base);
1832 out_mem:
1833 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1834 out_mode:
1835 if (!list_empty(&info->modelist))
1836 fb_destroy_modelist(&info->modelist);
1837 fb_destroy_modedb(info->monspecs.modedb);
1838 fb_dealloc_cmap(&info->cmap);
1839 out:
1840 if (par->vbe_modes)
1841 kfree(par->vbe_modes);
1842
1843 framebuffer_release(info);
1844 return err;
1845 }
1846
1847 static int uvesafb_remove(struct platform_device *dev)
1848 {
1849 struct fb_info *info = platform_get_drvdata(dev);
1850
1851 if (info) {
1852 struct uvesafb_par *par = info->par;
1853
1854 sysfs_remove_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1855 unregister_framebuffer(info);
1856 release_region(0x3c0, 32);
1857 iounmap(info->screen_base);
1858 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1859 fb_destroy_modedb(info->monspecs.modedb);
1860 fb_dealloc_cmap(&info->cmap);
1861
1862 if (par) {
1863 if (par->vbe_modes)
1864 kfree(par->vbe_modes);
1865 if (par->vbe_state_orig)
1866 kfree(par->vbe_state_orig);
1867 if (par->vbe_state_saved)
1868 kfree(par->vbe_state_saved);
1869 }
1870
1871 framebuffer_release(info);
1872 }
1873 return 0;
1874 }
1875
1876 static struct platform_driver uvesafb_driver = {
1877 .probe = uvesafb_probe,
1878 .remove = uvesafb_remove,
1879 .driver = {
1880 .name = "uvesafb",
1881 },
1882 };
1883
1884 static struct platform_device *uvesafb_device;
1885
1886 #ifndef MODULE
1887 static int __devinit uvesafb_setup(char *options)
1888 {
1889 char *this_opt;
1890
1891 if (!options || !*options)
1892 return 0;
1893
1894 while ((this_opt = strsep(&options, ",")) != NULL) {
1895 if (!*this_opt) continue;
1896
1897 if (!strcmp(this_opt, "redraw"))
1898 ypan = 0;
1899 else if (!strcmp(this_opt, "ypan"))
1900 ypan = 1;
1901 else if (!strcmp(this_opt, "ywrap"))
1902 ypan = 2;
1903 else if (!strcmp(this_opt, "vgapal"))
1904 pmi_setpal = 0;
1905 else if (!strcmp(this_opt, "pmipal"))
1906 pmi_setpal = 1;
1907 else if (!strncmp(this_opt, "mtrr:", 5))
1908 mtrr = simple_strtoul(this_opt+5, NULL, 0);
1909 else if (!strcmp(this_opt, "nomtrr"))
1910 mtrr = 0;
1911 else if (!strcmp(this_opt, "nocrtc"))
1912 nocrtc = 1;
1913 else if (!strcmp(this_opt, "noedid"))
1914 noedid = 1;
1915 else if (!strcmp(this_opt, "noblank"))
1916 blank = 0;
1917 else if (!strncmp(this_opt, "vtotal:", 7))
1918 vram_total = simple_strtoul(this_opt + 7, NULL, 0);
1919 else if (!strncmp(this_opt, "vremap:", 7))
1920 vram_remap = simple_strtoul(this_opt + 7, NULL, 0);
1921 else if (!strncmp(this_opt, "maxhf:", 6))
1922 maxhf = simple_strtoul(this_opt + 6, NULL, 0);
1923 else if (!strncmp(this_opt, "maxvf:", 6))
1924 maxvf = simple_strtoul(this_opt + 6, NULL, 0);
1925 else if (!strncmp(this_opt, "maxclk:", 7))
1926 maxclk = simple_strtoul(this_opt + 7, NULL, 0);
1927 else if (!strncmp(this_opt, "vbemode:", 8))
1928 vbemode = simple_strtoul(this_opt + 8, NULL, 0);
1929 else if (this_opt[0] >= '0' && this_opt[0] <= '9') {
1930 mode_option = this_opt;
1931 } else {
1932 printk(KERN_WARNING
1933 "uvesafb: unrecognized option %s\n", this_opt);
1934 }
1935 }
1936
1937 return 0;
1938 }
1939 #endif /* !MODULE */
1940
1941 static ssize_t show_v86d(struct device_driver *dev, char *buf)
1942 {
1943 return snprintf(buf, PAGE_SIZE, "%s\n", v86d_path);
1944 }
1945
1946 static ssize_t store_v86d(struct device_driver *dev, const char *buf,
1947 size_t count)
1948 {
1949 strncpy(v86d_path, buf, PATH_MAX);
1950 return count;
1951 }
1952
1953 static DRIVER_ATTR(v86d, S_IRUGO | S_IWUSR, show_v86d, store_v86d);
1954
1955 static int __devinit uvesafb_init(void)
1956 {
1957 int err;
1958
1959 #ifndef MODULE
1960 char *option = NULL;
1961
1962 if (fb_get_options("uvesafb", &option))
1963 return -ENODEV;
1964 uvesafb_setup(option);
1965 #endif
1966 err = cn_add_callback(&uvesafb_cn_id, "uvesafb", uvesafb_cn_callback);
1967 if (err)
1968 return err;
1969
1970 err = platform_driver_register(&uvesafb_driver);
1971
1972 if (!err) {
1973 uvesafb_device = platform_device_alloc("uvesafb", 0);
1974 if (uvesafb_device)
1975 err = platform_device_add(uvesafb_device);
1976 else
1977 err = -ENOMEM;
1978
1979 if (err) {
1980 platform_device_put(uvesafb_device);
1981 platform_driver_unregister(&uvesafb_driver);
1982 cn_del_callback(&uvesafb_cn_id);
1983 return err;
1984 }
1985
1986 err = driver_create_file(&uvesafb_driver.driver,
1987 &driver_attr_v86d);
1988 if (err) {
1989 printk(KERN_WARNING "uvesafb: failed to register "
1990 "attributes\n");
1991 err = 0;
1992 }
1993 }
1994 return err;
1995 }
1996
1997 module_init(uvesafb_init);
1998
1999 static void __devexit uvesafb_exit(void)
2000 {
2001 struct uvesafb_ktask *task;
2002
2003 if (v86d_started) {
2004 task = uvesafb_prep();
2005 if (task) {
2006 task->t.flags = TF_EXIT;
2007 uvesafb_exec(task);
2008 uvesafb_free(task);
2009 }
2010 }
2011
2012 cn_del_callback(&uvesafb_cn_id);
2013 driver_remove_file(&uvesafb_driver.driver, &driver_attr_v86d);
2014 platform_device_unregister(uvesafb_device);
2015 platform_driver_unregister(&uvesafb_driver);
2016 }
2017
2018 module_exit(uvesafb_exit);
2019
2020 static int param_get_scroll(char *buffer, struct kernel_param *kp)
2021 {
2022 return 0;
2023 }
2024
2025 static int param_set_scroll(const char *val, struct kernel_param *kp)
2026 {
2027 ypan = 0;
2028
2029 if (!strcmp(val, "redraw"))
2030 ypan = 0;
2031 else if (!strcmp(val, "ypan"))
2032 ypan = 1;
2033 else if (!strcmp(val, "ywrap"))
2034 ypan = 2;
2035
2036 return 0;
2037 }
2038
2039 #define param_check_scroll(name, p) __param_check(name, p, void)
2040
2041 module_param_named(scroll, ypan, scroll, 0);
2042 MODULE_PARM_DESC(scroll,
2043 "Scrolling mode, set to 'redraw', 'ypan', or 'ywrap'");
2044 module_param_named(vgapal, pmi_setpal, invbool, 0);
2045 MODULE_PARM_DESC(vgapal, "Set palette using VGA registers");
2046 module_param_named(pmipal, pmi_setpal, bool, 0);
2047 MODULE_PARM_DESC(pmipal, "Set palette using PMI calls");
2048 module_param(mtrr, uint, 0);
2049 MODULE_PARM_DESC(mtrr,
2050 "Memory Type Range Registers setting. Use 0 to disable.");
2051 module_param(blank, bool, 0);
2052 MODULE_PARM_DESC(blank, "Enable hardware blanking");
2053 module_param(nocrtc, bool, 0);
2054 MODULE_PARM_DESC(nocrtc, "Ignore CRTC timings when setting modes");
2055 module_param(noedid, bool, 0);
2056 MODULE_PARM_DESC(noedid,
2057 "Ignore EDID-provided monitor limits when setting modes");
2058 module_param(vram_remap, uint, 0);
2059 MODULE_PARM_DESC(vram_remap, "Set amount of video memory to be used [MiB]");
2060 module_param(vram_total, uint, 0);
2061 MODULE_PARM_DESC(vram_total, "Set total amount of video memoery [MiB]");
2062 module_param(maxclk, ushort, 0);
2063 MODULE_PARM_DESC(maxclk, "Maximum pixelclock [MHz], overrides EDID data");
2064 module_param(maxhf, ushort, 0);
2065 MODULE_PARM_DESC(maxhf,
2066 "Maximum horizontal frequency [kHz], overrides EDID data");
2067 module_param(maxvf, ushort, 0);
2068 MODULE_PARM_DESC(maxvf,
2069 "Maximum vertical frequency [Hz], overrides EDID data");
2070 module_param(mode_option, charp, 0);
2071 MODULE_PARM_DESC(mode_option,
2072 "Specify initial video mode as \"<xres>x<yres>[-<bpp>][@<refresh>]\"");
2073 module_param(vbemode, ushort, 0);
2074 MODULE_PARM_DESC(vbemode,
2075 "VBE mode number to set, overrides the 'mode' option");
2076 module_param_string(v86d, v86d_path, PATH_MAX, 0660);
2077 MODULE_PARM_DESC(v86d, "Path to the v86d userspace helper.");
2078
2079 MODULE_LICENSE("GPL");
2080 MODULE_AUTHOR("Michal Januszewski <spock@gentoo.org>");
2081 MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards");
2082
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree