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Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / video / uvesafb.c
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 = {
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 = 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 = true; /* use PMI for palette changes */
50 static bool nocrtc; /* ignore CRTC settings */
51 static bool noedid; /* don't try DDC transfers */
52 static int vram_remap; /* set amt. of memory to be used */
53 static int vram_total; /* set total amount of memory */
54 static u16 maxclk; /* maximum pixel clock */
55 static u16 maxvf; /* maximum vertical frequency */
56 static u16 maxhf; /* maximum horizontal frequency */
57 static u16 vbemode; /* force use of a specific VBE mode */
58 static char *mode_option;
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 = prandom_u32();
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 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 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 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 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 uvesafb_vbe_getedid(struct uvesafb_ktask *task, struct fb_info *info)
622 {
623 struct uvesafb_par *par = info->par;
624 int err = 0;
625
626 if (noedid || par->vbe_ib.vbe_version < 0x0300)
627 return -EINVAL;
628
629 task->t.regs.eax = 0x4f15;
630 task->t.regs.ebx = 0;
631 task->t.regs.ecx = 0;
632 task->t.buf_len = 0;
633 task->t.flags = 0;
634
635 err = uvesafb_exec(task);
636
637 if ((task->t.regs.eax & 0xffff) != 0x004f || err)
638 return -EINVAL;
639
640 if ((task->t.regs.ebx & 0x3) == 3) {
641 printk(KERN_INFO "uvesafb: VBIOS/hardware supports both "
642 "DDC1 and DDC2 transfers\n");
643 } else if ((task->t.regs.ebx & 0x3) == 2) {
644 printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC2 "
645 "transfers\n");
646 } else if ((task->t.regs.ebx & 0x3) == 1) {
647 printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC1 "
648 "transfers\n");
649 } else {
650 printk(KERN_INFO "uvesafb: VBIOS/hardware doesn't support "
651 "DDC transfers\n");
652 return -EINVAL;
653 }
654
655 task->t.regs.eax = 0x4f15;
656 task->t.regs.ebx = 1;
657 task->t.regs.ecx = task->t.regs.edx = 0;
658 task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
659 task->t.buf_len = EDID_LENGTH;
660 task->buf = kzalloc(EDID_LENGTH, GFP_KERNEL);
661 if (!task->buf)
662 return -ENOMEM;
663
664 err = uvesafb_exec(task);
665
666 if ((task->t.regs.eax & 0xffff) == 0x004f && !err) {
667 fb_edid_to_monspecs(task->buf, &info->monspecs);
668
669 if (info->monspecs.vfmax && info->monspecs.hfmax) {
670 /*
671 * If the maximum pixel clock wasn't specified in
672 * the EDID block, set it to 300 MHz.
673 */
674 if (info->monspecs.dclkmax == 0)
675 info->monspecs.dclkmax = 300 * 1000000;
676 info->monspecs.gtf = 1;
677 }
678 } else {
679 err = -EINVAL;
680 }
681
682 kfree(task->buf);
683 return err;
684 }
685
686 static void uvesafb_vbe_getmonspecs(struct uvesafb_ktask *task,
687 struct fb_info *info)
688 {
689 struct uvesafb_par *par = info->par;
690 int i;
691
692 memset(&info->monspecs, 0, sizeof(info->monspecs));
693
694 /*
695 * If we don't get all necessary data from the EDID block,
696 * mark it as incompatible with the GTF and set nocrtc so
697 * that we always use the default BIOS refresh rate.
698 */
699 if (uvesafb_vbe_getedid(task, info)) {
700 info->monspecs.gtf = 0;
701 par->nocrtc = 1;
702 }
703
704 /* Kernel command line overrides. */
705 if (maxclk)
706 info->monspecs.dclkmax = maxclk * 1000000;
707 if (maxvf)
708 info->monspecs.vfmax = maxvf;
709 if (maxhf)
710 info->monspecs.hfmax = maxhf * 1000;
711
712 /*
713 * In case DDC transfers are not supported, the user can provide
714 * monitor limits manually. Lower limits are set to "safe" values.
715 */
716 if (info->monspecs.gtf == 0 && maxclk && maxvf && maxhf) {
717 info->monspecs.dclkmin = 0;
718 info->monspecs.vfmin = 60;
719 info->monspecs.hfmin = 29000;
720 info->monspecs.gtf = 1;
721 par->nocrtc = 0;
722 }
723
724 if (info->monspecs.gtf)
725 printk(KERN_INFO
726 "uvesafb: monitor limits: vf = %d Hz, hf = %d kHz, "
727 "clk = %d MHz\n", info->monspecs.vfmax,
728 (int)(info->monspecs.hfmax / 1000),
729 (int)(info->monspecs.dclkmax / 1000000));
730 else
731 printk(KERN_INFO "uvesafb: no monitor limits have been set, "
732 "default refresh rate will be used\n");
733
734 /* Add VBE modes to the modelist. */
735 for (i = 0; i < par->vbe_modes_cnt; i++) {
736 struct fb_var_screeninfo var;
737 struct vbe_mode_ib *mode;
738 struct fb_videomode vmode;
739
740 mode = &par->vbe_modes[i];
741 memset(&var, 0, sizeof(var));
742
743 var.xres = mode->x_res;
744 var.yres = mode->y_res;
745
746 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, &var, info);
747 fb_var_to_videomode(&vmode, &var);
748 fb_add_videomode(&vmode, &info->modelist);
749 }
750
751 /* Add valid VESA modes to our modelist. */
752 for (i = 0; i < VESA_MODEDB_SIZE; i++) {
753 if (uvesafb_is_valid_mode((struct fb_videomode *)
754 &vesa_modes[i], info))
755 fb_add_videomode(&vesa_modes[i], &info->modelist);
756 }
757
758 for (i = 0; i < info->monspecs.modedb_len; i++) {
759 if (uvesafb_is_valid_mode(&info->monspecs.modedb[i], info))
760 fb_add_videomode(&info->monspecs.modedb[i],
761 &info->modelist);
762 }
763
764 return;
765 }
766
767 static void uvesafb_vbe_getstatesize(struct uvesafb_ktask *task,
768 struct uvesafb_par *par)
769 {
770 int err;
771
772 uvesafb_reset(task);
773
774 /*
775 * Get the VBE state buffer size. We want all available
776 * hardware state data (CL = 0x0f).
777 */
778 task->t.regs.eax = 0x4f04;
779 task->t.regs.ecx = 0x000f;
780 task->t.regs.edx = 0x0000;
781 task->t.flags = 0;
782
783 err = uvesafb_exec(task);
784
785 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
786 printk(KERN_WARNING "uvesafb: VBE state buffer size "
787 "cannot be determined (eax=0x%x, err=%d)\n",
788 task->t.regs.eax, err);
789 par->vbe_state_size = 0;
790 return;
791 }
792
793 par->vbe_state_size = 64 * (task->t.regs.ebx & 0xffff);
794 }
795
796 static int uvesafb_vbe_init(struct fb_info *info)
797 {
798 struct uvesafb_ktask *task = NULL;
799 struct uvesafb_par *par = info->par;
800 int err;
801
802 task = uvesafb_prep();
803 if (!task)
804 return -ENOMEM;
805
806 err = uvesafb_vbe_getinfo(task, par);
807 if (err)
808 goto out;
809
810 err = uvesafb_vbe_getmodes(task, par);
811 if (err)
812 goto out;
813
814 par->nocrtc = nocrtc;
815 #ifdef CONFIG_X86_32
816 par->pmi_setpal = pmi_setpal;
817 par->ypan = ypan;
818
819 if (par->pmi_setpal || par->ypan) {
820 if (__supported_pte_mask & _PAGE_NX) {
821 par->pmi_setpal = par->ypan = 0;
822 printk(KERN_WARNING "uvesafb: NX protection is actively."
823 "We have better not to use the PMI.\n");
824 } else {
825 uvesafb_vbe_getpmi(task, par);
826 }
827 }
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 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 - dac_width;
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 - dac_width;
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 u8 *buf = NULL;
1184
1185 if (!cnt && par->vbe_state_size) {
1186 buf = uvesafb_vbe_state_save(par);
1187 if (IS_ERR(buf)) {
1188 printk(KERN_WARNING "uvesafb: save hardware state"
1189 "failed, error code is %ld!\n", PTR_ERR(buf));
1190 } else {
1191 par->vbe_state_orig = buf;
1192 }
1193 }
1194
1195 atomic_inc(&par->ref_count);
1196 return 0;
1197 }
1198
1199 static int uvesafb_release(struct fb_info *info, int user)
1200 {
1201 struct uvesafb_ktask *task = NULL;
1202 struct uvesafb_par *par = info->par;
1203 int cnt = atomic_read(&par->ref_count);
1204
1205 if (!cnt)
1206 return -EINVAL;
1207
1208 if (cnt != 1)
1209 goto out;
1210
1211 task = uvesafb_prep();
1212 if (!task)
1213 goto out;
1214
1215 /* First, try to set the standard 80x25 text mode. */
1216 task->t.regs.eax = 0x0003;
1217 uvesafb_exec(task);
1218
1219 /*
1220 * Now try to restore whatever hardware state we might have
1221 * saved when the fb device was first opened.
1222 */
1223 uvesafb_vbe_state_restore(par, par->vbe_state_orig);
1224 out:
1225 atomic_dec(&par->ref_count);
1226 if (task)
1227 uvesafb_free(task);
1228 return 0;
1229 }
1230
1231 static int uvesafb_set_par(struct fb_info *info)
1232 {
1233 struct uvesafb_par *par = info->par;
1234 struct uvesafb_ktask *task = NULL;
1235 struct vbe_crtc_ib *crtc = NULL;
1236 struct vbe_mode_ib *mode = NULL;
1237 int i, err = 0, depth = info->var.bits_per_pixel;
1238
1239 if (depth > 8 && depth != 32)
1240 depth = info->var.red.length + info->var.green.length +
1241 info->var.blue.length;
1242
1243 i = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, depth,
1244 UVESAFB_EXACT_RES | UVESAFB_EXACT_DEPTH);
1245 if (i >= 0)
1246 mode = &par->vbe_modes[i];
1247 else
1248 return -EINVAL;
1249
1250 task = uvesafb_prep();
1251 if (!task)
1252 return -ENOMEM;
1253 setmode:
1254 task->t.regs.eax = 0x4f02;
1255 task->t.regs.ebx = mode->mode_id | 0x4000; /* use LFB */
1256
1257 if (par->vbe_ib.vbe_version >= 0x0300 && !par->nocrtc &&
1258 info->var.pixclock != 0) {
1259 task->t.regs.ebx |= 0x0800; /* use CRTC data */
1260 task->t.flags = TF_BUF_ESDI;
1261 crtc = kzalloc(sizeof(struct vbe_crtc_ib), GFP_KERNEL);
1262 if (!crtc) {
1263 err = -ENOMEM;
1264 goto out;
1265 }
1266 crtc->horiz_start = info->var.xres + info->var.right_margin;
1267 crtc->horiz_end = crtc->horiz_start + info->var.hsync_len;
1268 crtc->horiz_total = crtc->horiz_end + info->var.left_margin;
1269
1270 crtc->vert_start = info->var.yres + info->var.lower_margin;
1271 crtc->vert_end = crtc->vert_start + info->var.vsync_len;
1272 crtc->vert_total = crtc->vert_end + info->var.upper_margin;
1273
1274 crtc->pixel_clock = PICOS2KHZ(info->var.pixclock) * 1000;
1275 crtc->refresh_rate = (u16)(100 * (crtc->pixel_clock /
1276 (crtc->vert_total * crtc->horiz_total)));
1277
1278 if (info->var.vmode & FB_VMODE_DOUBLE)
1279 crtc->flags |= 0x1;
1280 if (info->var.vmode & FB_VMODE_INTERLACED)
1281 crtc->flags |= 0x2;
1282 if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
1283 crtc->flags |= 0x4;
1284 if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
1285 crtc->flags |= 0x8;
1286 memcpy(&par->crtc, crtc, sizeof(*crtc));
1287 } else {
1288 memset(&par->crtc, 0, sizeof(*crtc));
1289 }
1290
1291 task->t.buf_len = sizeof(struct vbe_crtc_ib);
1292 task->buf = &par->crtc;
1293
1294 err = uvesafb_exec(task);
1295 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
1296 /*
1297 * The mode switch might have failed because we tried to
1298 * use our own timings. Try again with the default timings.
1299 */
1300 if (crtc != NULL) {
1301 printk(KERN_WARNING "uvesafb: mode switch failed "
1302 "(eax=0x%x, err=%d). Trying again with "
1303 "default timings.\n", task->t.regs.eax, err);
1304 uvesafb_reset(task);
1305 kfree(crtc);
1306 crtc = NULL;
1307 info->var.pixclock = 0;
1308 goto setmode;
1309 } else {
1310 printk(KERN_ERR "uvesafb: mode switch failed (eax="
1311 "0x%x, err=%d)\n", task->t.regs.eax, err);
1312 err = -EINVAL;
1313 goto out;
1314 }
1315 }
1316 par->mode_idx = i;
1317
1318 /* For 8bpp modes, always try to set the DAC to 8 bits. */
1319 if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC &&
1320 mode->bits_per_pixel <= 8) {
1321 uvesafb_reset(task);
1322 task->t.regs.eax = 0x4f08;
1323 task->t.regs.ebx = 0x0800;
1324
1325 err = uvesafb_exec(task);
1326 if (err || (task->t.regs.eax & 0xffff) != 0x004f ||
1327 ((task->t.regs.ebx & 0xff00) >> 8) != 8) {
1328 dac_width = 6;
1329 } else {
1330 dac_width = 8;
1331 }
1332 }
1333
1334 info->fix.visual = (info->var.bits_per_pixel == 8) ?
1335 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
1336 info->fix.line_length = mode->bytes_per_scan_line;
1337
1338 out: if (crtc != NULL)
1339 kfree(crtc);
1340 uvesafb_free(task);
1341
1342 return err;
1343 }
1344
1345 static void uvesafb_check_limits(struct fb_var_screeninfo *var,
1346 struct fb_info *info)
1347 {
1348 const struct fb_videomode *mode;
1349 struct uvesafb_par *par = info->par;
1350
1351 /*
1352 * If pixclock is set to 0, then we're using default BIOS timings
1353 * and thus don't have to perform any checks here.
1354 */
1355 if (!var->pixclock)
1356 return;
1357
1358 if (par->vbe_ib.vbe_version < 0x0300) {
1359 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, var, info);
1360 return;
1361 }
1362
1363 if (!fb_validate_mode(var, info))
1364 return;
1365
1366 mode = fb_find_best_mode(var, &info->modelist);
1367 if (mode) {
1368 if (mode->xres == var->xres && mode->yres == var->yres &&
1369 !(mode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))) {
1370 fb_videomode_to_var(var, mode);
1371 return;
1372 }
1373 }
1374
1375 if (info->monspecs.gtf && !fb_get_mode(FB_MAXTIMINGS, 0, var, info))
1376 return;
1377 /* Use default refresh rate */
1378 var->pixclock = 0;
1379 }
1380
1381 static int uvesafb_check_var(struct fb_var_screeninfo *var,
1382 struct fb_info *info)
1383 {
1384 struct uvesafb_par *par = info->par;
1385 struct vbe_mode_ib *mode = NULL;
1386 int match = -1;
1387 int depth = var->red.length + var->green.length + var->blue.length;
1388
1389 /*
1390 * Various apps will use bits_per_pixel to set the color depth,
1391 * which is theoretically incorrect, but which we'll try to handle
1392 * here.
1393 */
1394 if (depth == 0 || abs(depth - var->bits_per_pixel) >= 8)
1395 depth = var->bits_per_pixel;
1396
1397 match = uvesafb_vbe_find_mode(par, var->xres, var->yres, depth,
1398 UVESAFB_EXACT_RES);
1399 if (match == -1)
1400 return -EINVAL;
1401
1402 mode = &par->vbe_modes[match];
1403 uvesafb_setup_var(var, info, mode);
1404
1405 /*
1406 * Check whether we have remapped enough memory for this mode.
1407 * We might be called at an early stage, when we haven't remapped
1408 * any memory yet, in which case we simply skip the check.
1409 */
1410 if (var->yres * mode->bytes_per_scan_line > info->fix.smem_len
1411 && info->fix.smem_len)
1412 return -EINVAL;
1413
1414 if ((var->vmode & FB_VMODE_DOUBLE) &&
1415 !(par->vbe_modes[match].mode_attr & 0x100))
1416 var->vmode &= ~FB_VMODE_DOUBLE;
1417
1418 if ((var->vmode & FB_VMODE_INTERLACED) &&
1419 !(par->vbe_modes[match].mode_attr & 0x200))
1420 var->vmode &= ~FB_VMODE_INTERLACED;
1421
1422 uvesafb_check_limits(var, info);
1423
1424 var->xres_virtual = var->xres;
1425 var->yres_virtual = (par->ypan) ?
1426 info->fix.smem_len / mode->bytes_per_scan_line :
1427 var->yres;
1428 return 0;
1429 }
1430
1431 static struct fb_ops uvesafb_ops = {
1432 .owner = THIS_MODULE,
1433 .fb_open = uvesafb_open,
1434 .fb_release = uvesafb_release,
1435 .fb_setcolreg = uvesafb_setcolreg,
1436 .fb_setcmap = uvesafb_setcmap,
1437 .fb_pan_display = uvesafb_pan_display,
1438 .fb_blank = uvesafb_blank,
1439 .fb_fillrect = cfb_fillrect,
1440 .fb_copyarea = cfb_copyarea,
1441 .fb_imageblit = cfb_imageblit,
1442 .fb_check_var = uvesafb_check_var,
1443 .fb_set_par = uvesafb_set_par,
1444 };
1445
1446 static void uvesafb_init_info(struct fb_info *info, struct vbe_mode_ib *mode)
1447 {
1448 unsigned int size_vmode;
1449 unsigned int size_remap;
1450 unsigned int size_total;
1451 struct uvesafb_par *par = info->par;
1452 int i, h;
1453
1454 info->pseudo_palette = ((u8 *)info->par + sizeof(struct uvesafb_par));
1455 info->fix = uvesafb_fix;
1456 info->fix.ypanstep = par->ypan ? 1 : 0;
1457 info->fix.ywrapstep = (par->ypan > 1) ? 1 : 0;
1458
1459 /* Disable blanking if the user requested so. */
1460 if (!blank)
1461 info->fbops->fb_blank = NULL;
1462
1463 /*
1464 * Find out how much IO memory is required for the mode with
1465 * the highest resolution.
1466 */
1467 size_remap = 0;
1468 for (i = 0; i < par->vbe_modes_cnt; i++) {
1469 h = par->vbe_modes[i].bytes_per_scan_line *
1470 par->vbe_modes[i].y_res;
1471 if (h > size_remap)
1472 size_remap = h;
1473 }
1474 size_remap *= 2;
1475
1476 /*
1477 * size_vmode -- that is the amount of memory needed for the
1478 * used video mode, i.e. the minimum amount of
1479 * memory we need.
1480 */
1481 if (mode != NULL) {
1482 size_vmode = info->var.yres * mode->bytes_per_scan_line;
1483 } else {
1484 size_vmode = info->var.yres * info->var.xres *
1485 ((info->var.bits_per_pixel + 7) >> 3);
1486 }
1487
1488 /*
1489 * size_total -- all video memory we have. Used for mtrr
1490 * entries, resource allocation and bounds
1491 * checking.
1492 */
1493 size_total = par->vbe_ib.total_memory * 65536;
1494 if (vram_total)
1495 size_total = vram_total * 1024 * 1024;
1496 if (size_total < size_vmode)
1497 size_total = size_vmode;
1498
1499 /*
1500 * size_remap -- the amount of video memory we are going to
1501 * use for vesafb. With modern cards it is no
1502 * option to simply use size_total as th
1503 * wastes plenty of kernel address space.
1504 */
1505 if (vram_remap)
1506 size_remap = vram_remap * 1024 * 1024;
1507 if (size_remap < size_vmode)
1508 size_remap = size_vmode;
1509 if (size_remap > size_total)
1510 size_remap = size_total;
1511
1512 info->fix.smem_len = size_remap;
1513 info->fix.smem_start = mode->phys_base_ptr;
1514
1515 /*
1516 * We have to set yres_virtual here because when setup_var() was
1517 * called, smem_len wasn't defined yet.
1518 */
1519 info->var.yres_virtual = info->fix.smem_len /
1520 mode->bytes_per_scan_line;
1521
1522 if (par->ypan && info->var.yres_virtual > info->var.yres) {
1523 printk(KERN_INFO "uvesafb: scrolling: %s "
1524 "using protected mode interface, "
1525 "yres_virtual=%d\n",
1526 (par->ypan > 1) ? "ywrap" : "ypan",
1527 info->var.yres_virtual);
1528 } else {
1529 printk(KERN_INFO "uvesafb: scrolling: redraw\n");
1530 info->var.yres_virtual = info->var.yres;
1531 par->ypan = 0;
1532 }
1533
1534 info->flags = FBINFO_FLAG_DEFAULT |
1535 (par->ypan ? FBINFO_HWACCEL_YPAN : 0);
1536
1537 if (!par->ypan)
1538 info->fbops->fb_pan_display = NULL;
1539 }
1540
1541 static void uvesafb_init_mtrr(struct fb_info *info)
1542 {
1543 #ifdef CONFIG_MTRR
1544 if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) {
1545 int temp_size = info->fix.smem_len;
1546 unsigned int type = 0;
1547
1548 switch (mtrr) {
1549 case 1:
1550 type = MTRR_TYPE_UNCACHABLE;
1551 break;
1552 case 2:
1553 type = MTRR_TYPE_WRBACK;
1554 break;
1555 case 3:
1556 type = MTRR_TYPE_WRCOMB;
1557 break;
1558 case 4:
1559 type = MTRR_TYPE_WRTHROUGH;
1560 break;
1561 default:
1562 type = 0;
1563 break;
1564 }
1565
1566 if (type) {
1567 int rc;
1568
1569 /* Find the largest power-of-two */
1570 temp_size = roundup_pow_of_two(temp_size);
1571
1572 /* Try and find a power of two to add */
1573 do {
1574 rc = mtrr_add(info->fix.smem_start,
1575 temp_size, type, 1);
1576 temp_size >>= 1;
1577 } while (temp_size >= PAGE_SIZE && rc == -EINVAL);
1578 }
1579 }
1580 #endif /* CONFIG_MTRR */
1581 }
1582
1583 static void uvesafb_ioremap(struct fb_info *info)
1584 {
1585 #ifdef CONFIG_X86
1586 switch (mtrr) {
1587 case 1: /* uncachable */
1588 info->screen_base = ioremap_nocache(info->fix.smem_start, info->fix.smem_len);
1589 break;
1590 case 2: /* write-back */
1591 info->screen_base = ioremap_cache(info->fix.smem_start, info->fix.smem_len);
1592 break;
1593 case 3: /* write-combining */
1594 info->screen_base = ioremap_wc(info->fix.smem_start, info->fix.smem_len);
1595 break;
1596 case 4: /* write-through */
1597 default:
1598 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
1599 break;
1600 }
1601 #else
1602 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
1603 #endif /* CONFIG_X86 */
1604 }
1605
1606 static ssize_t uvesafb_show_vbe_ver(struct device *dev,
1607 struct device_attribute *attr, char *buf)
1608 {
1609 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1610 struct uvesafb_par *par = info->par;
1611
1612 return snprintf(buf, PAGE_SIZE, "%.4x\n", par->vbe_ib.vbe_version);
1613 }
1614
1615 static DEVICE_ATTR(vbe_version, S_IRUGO, uvesafb_show_vbe_ver, NULL);
1616
1617 static ssize_t uvesafb_show_vbe_modes(struct device *dev,
1618 struct device_attribute *attr, char *buf)
1619 {
1620 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1621 struct uvesafb_par *par = info->par;
1622 int ret = 0, i;
1623
1624 for (i = 0; i < par->vbe_modes_cnt && ret < PAGE_SIZE; i++) {
1625 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1626 "%dx%d-%d, 0x%.4x\n",
1627 par->vbe_modes[i].x_res, par->vbe_modes[i].y_res,
1628 par->vbe_modes[i].depth, par->vbe_modes[i].mode_id);
1629 }
1630
1631 return ret;
1632 }
1633
1634 static DEVICE_ATTR(vbe_modes, S_IRUGO, uvesafb_show_vbe_modes, NULL);
1635
1636 static ssize_t uvesafb_show_vendor(struct device *dev,
1637 struct device_attribute *attr, char *buf)
1638 {
1639 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1640 struct uvesafb_par *par = info->par;
1641
1642 if (par->vbe_ib.oem_vendor_name_ptr)
1643 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1644 (&par->vbe_ib) + par->vbe_ib.oem_vendor_name_ptr);
1645 else
1646 return 0;
1647 }
1648
1649 static DEVICE_ATTR(oem_vendor, S_IRUGO, uvesafb_show_vendor, NULL);
1650
1651 static ssize_t uvesafb_show_product_name(struct device *dev,
1652 struct device_attribute *attr, char *buf)
1653 {
1654 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1655 struct uvesafb_par *par = info->par;
1656
1657 if (par->vbe_ib.oem_product_name_ptr)
1658 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1659 (&par->vbe_ib) + par->vbe_ib.oem_product_name_ptr);
1660 else
1661 return 0;
1662 }
1663
1664 static DEVICE_ATTR(oem_product_name, S_IRUGO, uvesafb_show_product_name, NULL);
1665
1666 static ssize_t uvesafb_show_product_rev(struct device *dev,
1667 struct device_attribute *attr, char *buf)
1668 {
1669 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1670 struct uvesafb_par *par = info->par;
1671
1672 if (par->vbe_ib.oem_product_rev_ptr)
1673 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1674 (&par->vbe_ib) + par->vbe_ib.oem_product_rev_ptr);
1675 else
1676 return 0;
1677 }
1678
1679 static DEVICE_ATTR(oem_product_rev, S_IRUGO, uvesafb_show_product_rev, NULL);
1680
1681 static ssize_t uvesafb_show_oem_string(struct device *dev,
1682 struct device_attribute *attr, char *buf)
1683 {
1684 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1685 struct uvesafb_par *par = info->par;
1686
1687 if (par->vbe_ib.oem_string_ptr)
1688 return snprintf(buf, PAGE_SIZE, "%s\n",
1689 (char *)(&par->vbe_ib) + par->vbe_ib.oem_string_ptr);
1690 else
1691 return 0;
1692 }
1693
1694 static DEVICE_ATTR(oem_string, S_IRUGO, uvesafb_show_oem_string, NULL);
1695
1696 static ssize_t uvesafb_show_nocrtc(struct device *dev,
1697 struct device_attribute *attr, char *buf)
1698 {
1699 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1700 struct uvesafb_par *par = info->par;
1701
1702 return snprintf(buf, PAGE_SIZE, "%d\n", par->nocrtc);
1703 }
1704
1705 static ssize_t uvesafb_store_nocrtc(struct device *dev,
1706 struct device_attribute *attr, const char *buf, size_t count)
1707 {
1708 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1709 struct uvesafb_par *par = info->par;
1710
1711 if (count > 0) {
1712 if (buf[0] == '0')
1713 par->nocrtc = 0;
1714 else
1715 par->nocrtc = 1;
1716 }
1717 return count;
1718 }
1719
1720 static DEVICE_ATTR(nocrtc, S_IRUGO | S_IWUSR, uvesafb_show_nocrtc,
1721 uvesafb_store_nocrtc);
1722
1723 static struct attribute *uvesafb_dev_attrs[] = {
1724 &dev_attr_vbe_version.attr,
1725 &dev_attr_vbe_modes.attr,
1726 &dev_attr_oem_vendor.attr,
1727 &dev_attr_oem_product_name.attr,
1728 &dev_attr_oem_product_rev.attr,
1729 &dev_attr_oem_string.attr,
1730 &dev_attr_nocrtc.attr,
1731 NULL,
1732 };
1733
1734 static struct attribute_group uvesafb_dev_attgrp = {
1735 .name = NULL,
1736 .attrs = uvesafb_dev_attrs,
1737 };
1738
1739 static int uvesafb_probe(struct platform_device *dev)
1740 {
1741 struct fb_info *info;
1742 struct vbe_mode_ib *mode = NULL;
1743 struct uvesafb_par *par;
1744 int err = 0, i;
1745
1746 info = framebuffer_alloc(sizeof(*par) + sizeof(u32) * 256, &dev->dev);
1747 if (!info)
1748 return -ENOMEM;
1749
1750 par = info->par;
1751
1752 err = uvesafb_vbe_init(info);
1753 if (err) {
1754 printk(KERN_ERR "uvesafb: vbe_init() failed with %d\n", err);
1755 goto out;
1756 }
1757
1758 info->fbops = &uvesafb_ops;
1759
1760 i = uvesafb_vbe_init_mode(info);
1761 if (i < 0) {
1762 err = -EINVAL;
1763 goto out;
1764 } else {
1765 mode = &par->vbe_modes[i];
1766 }
1767
1768 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
1769 err = -ENXIO;
1770 goto out;
1771 }
1772
1773 uvesafb_init_info(info, mode);
1774
1775 if (!request_region(0x3c0, 32, "uvesafb")) {
1776 printk(KERN_ERR "uvesafb: request region 0x3c0-0x3e0 failed\n");
1777 err = -EIO;
1778 goto out_mode;
1779 }
1780
1781 if (!request_mem_region(info->fix.smem_start, info->fix.smem_len,
1782 "uvesafb")) {
1783 printk(KERN_ERR "uvesafb: cannot reserve video memory at "
1784 "0x%lx\n", info->fix.smem_start);
1785 err = -EIO;
1786 goto out_reg;
1787 }
1788
1789 uvesafb_init_mtrr(info);
1790 uvesafb_ioremap(info);
1791
1792 if (!info->screen_base) {
1793 printk(KERN_ERR
1794 "uvesafb: abort, cannot ioremap 0x%x bytes of video "
1795 "memory at 0x%lx\n",
1796 info->fix.smem_len, info->fix.smem_start);
1797 err = -EIO;
1798 goto out_mem;
1799 }
1800
1801 platform_set_drvdata(dev, info);
1802
1803 if (register_framebuffer(info) < 0) {
1804 printk(KERN_ERR
1805 "uvesafb: failed to register framebuffer device\n");
1806 err = -EINVAL;
1807 goto out_unmap;
1808 }
1809
1810 printk(KERN_INFO "uvesafb: framebuffer at 0x%lx, mapped to 0x%p, "
1811 "using %dk, total %dk\n", info->fix.smem_start,
1812 info->screen_base, info->fix.smem_len/1024,
1813 par->vbe_ib.total_memory * 64);
1814 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
1815 info->fix.id);
1816
1817 err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1818 if (err != 0)
1819 printk(KERN_WARNING "fb%d: failed to register attributes\n",
1820 info->node);
1821
1822 return 0;
1823
1824 out_unmap:
1825 iounmap(info->screen_base);
1826 out_mem:
1827 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1828 out_reg:
1829 release_region(0x3c0, 32);
1830 out_mode:
1831 if (!list_empty(&info->modelist))
1832 fb_destroy_modelist(&info->modelist);
1833 fb_destroy_modedb(info->monspecs.modedb);
1834 fb_dealloc_cmap(&info->cmap);
1835 out:
1836 if (par->vbe_modes)
1837 kfree(par->vbe_modes);
1838
1839 framebuffer_release(info);
1840 return err;
1841 }
1842
1843 static int uvesafb_remove(struct platform_device *dev)
1844 {
1845 struct fb_info *info = platform_get_drvdata(dev);
1846
1847 if (info) {
1848 struct uvesafb_par *par = info->par;
1849
1850 sysfs_remove_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1851 unregister_framebuffer(info);
1852 release_region(0x3c0, 32);
1853 iounmap(info->screen_base);
1854 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1855 fb_destroy_modedb(info->monspecs.modedb);
1856 fb_dealloc_cmap(&info->cmap);
1857
1858 if (par) {
1859 if (par->vbe_modes)
1860 kfree(par->vbe_modes);
1861 if (par->vbe_state_orig)
1862 kfree(par->vbe_state_orig);
1863 if (par->vbe_state_saved)
1864 kfree(par->vbe_state_saved);
1865 }
1866
1867 framebuffer_release(info);
1868 }
1869 return 0;
1870 }
1871
1872 static struct platform_driver uvesafb_driver = {
1873 .probe = uvesafb_probe,
1874 .remove = uvesafb_remove,
1875 .driver = {
1876 .name = "uvesafb",
1877 },
1878 };
1879
1880 static struct platform_device *uvesafb_device;
1881
1882 #ifndef MODULE
1883 static int uvesafb_setup(char *options)
1884 {
1885 char *this_opt;
1886
1887 if (!options || !*options)
1888 return 0;
1889
1890 while ((this_opt = strsep(&options, ",")) != NULL) {
1891 if (!*this_opt) continue;
1892
1893 if (!strcmp(this_opt, "redraw"))
1894 ypan = 0;
1895 else if (!strcmp(this_opt, "ypan"))
1896 ypan = 1;
1897 else if (!strcmp(this_opt, "ywrap"))
1898 ypan = 2;
1899 else if (!strcmp(this_opt, "vgapal"))
1900 pmi_setpal = 0;
1901 else if (!strcmp(this_opt, "pmipal"))
1902 pmi_setpal = 1;
1903 else if (!strncmp(this_opt, "mtrr:", 5))
1904 mtrr = simple_strtoul(this_opt+5, NULL, 0);
1905 else if (!strcmp(this_opt, "nomtrr"))
1906 mtrr = 0;
1907 else if (!strcmp(this_opt, "nocrtc"))
1908 nocrtc = 1;
1909 else if (!strcmp(this_opt, "noedid"))
1910 noedid = 1;
1911 else if (!strcmp(this_opt, "noblank"))
1912 blank = 0;
1913 else if (!strncmp(this_opt, "vtotal:", 7))
1914 vram_total = simple_strtoul(this_opt + 7, NULL, 0);
1915 else if (!strncmp(this_opt, "vremap:", 7))
1916 vram_remap = simple_strtoul(this_opt + 7, NULL, 0);
1917 else if (!strncmp(this_opt, "maxhf:", 6))
1918 maxhf = simple_strtoul(this_opt + 6, NULL, 0);
1919 else if (!strncmp(this_opt, "maxvf:", 6))
1920 maxvf = simple_strtoul(this_opt + 6, NULL, 0);
1921 else if (!strncmp(this_opt, "maxclk:", 7))
1922 maxclk = simple_strtoul(this_opt + 7, NULL, 0);
1923 else if (!strncmp(this_opt, "vbemode:", 8))
1924 vbemode = simple_strtoul(this_opt + 8, NULL, 0);
1925 else if (this_opt[0] >= '0' && this_opt[0] <= '9') {
1926 mode_option = this_opt;
1927 } else {
1928 printk(KERN_WARNING
1929 "uvesafb: unrecognized option %s\n", this_opt);
1930 }
1931 }
1932
1933 return 0;
1934 }
1935 #endif /* !MODULE */
1936
1937 static ssize_t show_v86d(struct device_driver *dev, char *buf)
1938 {
1939 return snprintf(buf, PAGE_SIZE, "%s\n", v86d_path);
1940 }
1941
1942 static ssize_t store_v86d(struct device_driver *dev, const char *buf,
1943 size_t count)
1944 {
1945 strncpy(v86d_path, buf, PATH_MAX);
1946 return count;
1947 }
1948
1949 static DRIVER_ATTR(v86d, S_IRUGO | S_IWUSR, show_v86d, store_v86d);
1950
1951 static int uvesafb_init(void)
1952 {
1953 int err;
1954
1955 #ifndef MODULE
1956 char *option = NULL;
1957
1958 if (fb_get_options("uvesafb", &option))
1959 return -ENODEV;
1960 uvesafb_setup(option);
1961 #endif
1962 err = cn_add_callback(&uvesafb_cn_id, "uvesafb", uvesafb_cn_callback);
1963 if (err)
1964 return err;
1965
1966 err = platform_driver_register(&uvesafb_driver);
1967
1968 if (!err) {
1969 uvesafb_device = platform_device_alloc("uvesafb", 0);
1970 if (uvesafb_device)
1971 err = platform_device_add(uvesafb_device);
1972 else
1973 err = -ENOMEM;
1974
1975 if (err) {
1976 if (uvesafb_device)
1977 platform_device_put(uvesafb_device);
1978 platform_driver_unregister(&uvesafb_driver);
1979 cn_del_callback(&uvesafb_cn_id);
1980 return err;
1981 }
1982
1983 err = driver_create_file(&uvesafb_driver.driver,
1984 &driver_attr_v86d);
1985 if (err) {
1986 printk(KERN_WARNING "uvesafb: failed to register "
1987 "attributes\n");
1988 err = 0;
1989 }
1990 }
1991 return err;
1992 }
1993
1994 module_init(uvesafb_init);
1995
1996 static void uvesafb_exit(void)
1997 {
1998 struct uvesafb_ktask *task;
1999
2000 if (v86d_started) {
2001 task = uvesafb_prep();
2002 if (task) {
2003 task->t.flags = TF_EXIT;
2004 uvesafb_exec(task);
2005 uvesafb_free(task);
2006 }
2007 }
2008
2009 cn_del_callback(&uvesafb_cn_id);
2010 driver_remove_file(&uvesafb_driver.driver, &driver_attr_v86d);
2011 platform_device_unregister(uvesafb_device);
2012 platform_driver_unregister(&uvesafb_driver);
2013 }
2014
2015 module_exit(uvesafb_exit);
2016
2017 static int param_set_scroll(const char *val, const struct kernel_param *kp)
2018 {
2019 ypan = 0;
2020
2021 if (!strcmp(val, "redraw"))
2022 ypan = 0;
2023 else if (!strcmp(val, "ypan"))
2024 ypan = 1;
2025 else if (!strcmp(val, "ywrap"))
2026 ypan = 2;
2027 else
2028 return -EINVAL;
2029
2030 return 0;
2031 }
2032 static struct kernel_param_ops param_ops_scroll = {
2033 .set = param_set_scroll,
2034 };
2035 #define param_check_scroll(name, p) __param_check(name, p, void)
2036
2037 module_param_named(scroll, ypan, scroll, 0);
2038 MODULE_PARM_DESC(scroll,
2039 "Scrolling mode, set to 'redraw', 'ypan', or 'ywrap'");
2040 module_param_named(vgapal, pmi_setpal, invbool, 0);
2041 MODULE_PARM_DESC(vgapal, "Set palette using VGA registers");
2042 module_param_named(pmipal, pmi_setpal, bool, 0);
2043 MODULE_PARM_DESC(pmipal, "Set palette using PMI calls");
2044 module_param(mtrr, uint, 0);
2045 MODULE_PARM_DESC(mtrr,
2046 "Memory Type Range Registers setting. Use 0 to disable.");
2047 module_param(blank, bool, 0);
2048 MODULE_PARM_DESC(blank, "Enable hardware blanking");
2049 module_param(nocrtc, bool, 0);
2050 MODULE_PARM_DESC(nocrtc, "Ignore CRTC timings when setting modes");
2051 module_param(noedid, bool, 0);
2052 MODULE_PARM_DESC(noedid,
2053 "Ignore EDID-provided monitor limits when setting modes");
2054 module_param(vram_remap, uint, 0);
2055 MODULE_PARM_DESC(vram_remap, "Set amount of video memory to be used [MiB]");
2056 module_param(vram_total, uint, 0);
2057 MODULE_PARM_DESC(vram_total, "Set total amount of video memoery [MiB]");
2058 module_param(maxclk, ushort, 0);
2059 MODULE_PARM_DESC(maxclk, "Maximum pixelclock [MHz], overrides EDID data");
2060 module_param(maxhf, ushort, 0);
2061 MODULE_PARM_DESC(maxhf,
2062 "Maximum horizontal frequency [kHz], overrides EDID data");
2063 module_param(maxvf, ushort, 0);
2064 MODULE_PARM_DESC(maxvf,
2065 "Maximum vertical frequency [Hz], overrides EDID data");
2066 module_param(mode_option, charp, 0);
2067 MODULE_PARM_DESC(mode_option,
2068 "Specify initial video mode as \"<xres>x<yres>[-<bpp>][@<refresh>]\"");
2069 module_param(vbemode, ushort, 0);
2070 MODULE_PARM_DESC(vbemode,
2071 "VBE mode number to set, overrides the 'mode' option");
2072 module_param_string(v86d, v86d_path, PATH_MAX, 0660);
2073 MODULE_PARM_DESC(v86d, "Path to the v86d userspace helper.");
2074
2075 MODULE_LICENSE("GPL");
2076 MODULE_AUTHOR("Michal Januszewski <spock@gentoo.org>");
2077 MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards");
2078
kernel source for telekom puls (alcatel/mediatek)