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jbd2: Add commit time into the commit block
[linux-2.6/mini2440.git] / drivers / video / uvesafb.c
blobcdbb56edb6cbdde9b34231b5e985c70c3e39efb4
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_any());
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 }
208 }
209
210 if (!err && !(task->t.flags & TF_EXIT))
211 err = !wait_for_completion_timeout(task->done,
212 msecs_to_jiffies(UVESAFB_TIMEOUT));
213
214 mutex_lock(&uvfb_lock);
215 uvfb_tasks[seq] = NULL;
216 mutex_unlock(&uvfb_lock);
217
218 seq++;
219 if (seq >= UVESAFB_TASKS_MAX)
220 seq = 0;
221 out:
222 kfree(m);
223 return err;
224 }
225
226 /*
227 * Free a uvesafb_ktask struct.
228 */
229 static void uvesafb_free(struct uvesafb_ktask *task)
230 {
231 if (task) {
232 if (task->done)
233 kfree(task->done);
234 kfree(task);
235 }
236 }
237
238 /*
239 * Prepare a uvesafb_ktask struct to be used again.
240 */
241 static void uvesafb_reset(struct uvesafb_ktask *task)
242 {
243 struct completion *cpl = task->done;
244
245 memset(task, 0, sizeof(*task));
246 task->done = cpl;
247 }
248
249 /*
250 * Allocate and prepare a uvesafb_ktask struct.
251 */
252 static struct uvesafb_ktask *uvesafb_prep(void)
253 {
254 struct uvesafb_ktask *task;
255
256 task = kzalloc(sizeof(*task), GFP_KERNEL);
257 if (task) {
258 task->done = kzalloc(sizeof(*task->done), GFP_KERNEL);
259 if (!task->done) {
260 kfree(task);
261 task = NULL;
262 }
263 }
264 return task;
265 }
266
267 static void uvesafb_setup_var(struct fb_var_screeninfo *var,
268 struct fb_info *info, struct vbe_mode_ib *mode)
269 {
270 struct uvesafb_par *par = info->par;
271
272 var->vmode = FB_VMODE_NONINTERLACED;
273 var->sync = FB_SYNC_VERT_HIGH_ACT;
274
275 var->xres = mode->x_res;
276 var->yres = mode->y_res;
277 var->xres_virtual = mode->x_res;
278 var->yres_virtual = (par->ypan) ?
279 info->fix.smem_len / mode->bytes_per_scan_line :
280 mode->y_res;
281 var->xoffset = 0;
282 var->yoffset = 0;
283 var->bits_per_pixel = mode->bits_per_pixel;
284
285 if (var->bits_per_pixel == 15)
286 var->bits_per_pixel = 16;
287
288 if (var->bits_per_pixel > 8) {
289 var->red.offset = mode->red_off;
290 var->red.length = mode->red_len;
291 var->green.offset = mode->green_off;
292 var->green.length = mode->green_len;
293 var->blue.offset = mode->blue_off;
294 var->blue.length = mode->blue_len;
295 var->transp.offset = mode->rsvd_off;
296 var->transp.length = mode->rsvd_len;
297 } else {
298 var->red.offset = 0;
299 var->green.offset = 0;
300 var->blue.offset = 0;
301 var->transp.offset = 0;
302
303 /*
304 * We're assuming that we can switch the DAC to 8 bits. If
305 * this proves to be incorrect, we'll update the fields
306 * later in set_par().
307 */
308 if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC) {
309 var->red.length = 8;
310 var->green.length = 8;
311 var->blue.length = 8;
312 var->transp.length = 0;
313 } else {
314 var->red.length = 6;
315 var->green.length = 6;
316 var->blue.length = 6;
317 var->transp.length = 0;
318 }
319 }
320 }
321
322 static int uvesafb_vbe_find_mode(struct uvesafb_par *par,
323 int xres, int yres, int depth, unsigned char flags)
324 {
325 int i, match = -1, h = 0, d = 0x7fffffff;
326
327 for (i = 0; i < par->vbe_modes_cnt; i++) {
328 h = abs(par->vbe_modes[i].x_res - xres) +
329 abs(par->vbe_modes[i].y_res - yres) +
330 abs(depth - par->vbe_modes[i].depth);
331
332 /*
333 * We have an exact match in terms of resolution
334 * and depth.
335 */
336 if (h == 0)
337 return i;
338
339 if (h < d || (h == d && par->vbe_modes[i].depth > depth)) {
340 d = h;
341 match = i;
342 }
343 }
344 i = 1;
345
346 if (flags & UVESAFB_EXACT_DEPTH &&
347 par->vbe_modes[match].depth != depth)
348 i = 0;
349
350 if (flags & UVESAFB_EXACT_RES && d > 24)
351 i = 0;
352
353 if (i != 0)
354 return match;
355 else
356 return -1;
357 }
358
359 static u8 *uvesafb_vbe_state_save(struct uvesafb_par *par)
360 {
361 struct uvesafb_ktask *task;
362 u8 *state;
363 int err;
364
365 if (!par->vbe_state_size)
366 return NULL;
367
368 state = kmalloc(par->vbe_state_size, GFP_KERNEL);
369 if (!state)
370 return NULL;
371
372 task = uvesafb_prep();
373 if (!task) {
374 kfree(state);
375 return NULL;
376 }
377
378 task->t.regs.eax = 0x4f04;
379 task->t.regs.ecx = 0x000f;
380 task->t.regs.edx = 0x0001;
381 task->t.flags = TF_BUF_RET | TF_BUF_ESBX;
382 task->t.buf_len = par->vbe_state_size;
383 task->buf = state;
384 err = uvesafb_exec(task);
385
386 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
387 printk(KERN_WARNING "uvesafb: VBE get state call "
388 "failed (eax=0x%x, err=%d)\n",
389 task->t.regs.eax, err);
390 kfree(state);
391 state = NULL;
392 }
393
394 uvesafb_free(task);
395 return state;
396 }
397
398 static void uvesafb_vbe_state_restore(struct uvesafb_par *par, u8 *state_buf)
399 {
400 struct uvesafb_ktask *task;
401 int err;
402
403 if (!state_buf)
404 return;
405
406 task = uvesafb_prep();
407 if (!task)
408 return;
409
410 task->t.regs.eax = 0x4f04;
411 task->t.regs.ecx = 0x000f;
412 task->t.regs.edx = 0x0002;
413 task->t.buf_len = par->vbe_state_size;
414 task->t.flags = TF_BUF_ESBX;
415 task->buf = state_buf;
416
417 err = uvesafb_exec(task);
418 if (err || (task->t.regs.eax & 0xffff) != 0x004f)
419 printk(KERN_WARNING "uvesafb: VBE state restore call "
420 "failed (eax=0x%x, err=%d)\n",
421 task->t.regs.eax, err);
422
423 uvesafb_free(task);
424 }
425
426 static int __devinit uvesafb_vbe_getinfo(struct uvesafb_ktask *task,
427 struct uvesafb_par *par)
428 {
429 int err;
430
431 task->t.regs.eax = 0x4f00;
432 task->t.flags = TF_VBEIB;
433 task->t.buf_len = sizeof(struct vbe_ib);
434 task->buf = &par->vbe_ib;
435 strncpy(par->vbe_ib.vbe_signature, "VBE2", 4);
436
437 err = uvesafb_exec(task);
438 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
439 printk(KERN_ERR "uvesafb: Getting VBE info block failed "
440 "(eax=0x%x, err=%d)\n", (u32)task->t.regs.eax,
441 err);
442 return -EINVAL;
443 }
444
445 if (par->vbe_ib.vbe_version < 0x0200) {
446 printk(KERN_ERR "uvesafb: Sorry, pre-VBE 2.0 cards are "
447 "not supported.\n");
448 return -EINVAL;
449 }
450
451 if (!par->vbe_ib.mode_list_ptr) {
452 printk(KERN_ERR "uvesafb: Missing mode list!\n");
453 return -EINVAL;
454 }
455
456 printk(KERN_INFO "uvesafb: ");
457
458 /*
459 * Convert string pointers and the mode list pointer into
460 * usable addresses. Print informational messages about the
461 * video adapter and its vendor.
462 */
463 if (par->vbe_ib.oem_vendor_name_ptr)
464 printk("%s, ",
465 ((char *)task->buf) + par->vbe_ib.oem_vendor_name_ptr);
466
467 if (par->vbe_ib.oem_product_name_ptr)
468 printk("%s, ",
469 ((char *)task->buf) + par->vbe_ib.oem_product_name_ptr);
470
471 if (par->vbe_ib.oem_product_rev_ptr)
472 printk("%s, ",
473 ((char *)task->buf) + par->vbe_ib.oem_product_rev_ptr);
474
475 if (par->vbe_ib.oem_string_ptr)
476 printk("OEM: %s, ",
477 ((char *)task->buf) + par->vbe_ib.oem_string_ptr);
478
479 printk("VBE v%d.%d\n", ((par->vbe_ib.vbe_version & 0xff00) >> 8),
480 par->vbe_ib.vbe_version & 0xff);
481
482 return 0;
483 }
484
485 static int __devinit uvesafb_vbe_getmodes(struct uvesafb_ktask *task,
486 struct uvesafb_par *par)
487 {
488 int off = 0, err;
489 u16 *mode;
490
491 par->vbe_modes_cnt = 0;
492
493 /* Count available modes. */
494 mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
495 while (*mode != 0xffff) {
496 par->vbe_modes_cnt++;
497 mode++;
498 }
499
500 par->vbe_modes = kzalloc(sizeof(struct vbe_mode_ib) *
501 par->vbe_modes_cnt, GFP_KERNEL);
502 if (!par->vbe_modes)
503 return -ENOMEM;
504
505 /* Get info about all available modes. */
506 mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
507 while (*mode != 0xffff) {
508 struct vbe_mode_ib *mib;
509
510 uvesafb_reset(task);
511 task->t.regs.eax = 0x4f01;
512 task->t.regs.ecx = (u32) *mode;
513 task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
514 task->t.buf_len = sizeof(struct vbe_mode_ib);
515 task->buf = par->vbe_modes + off;
516
517 err = uvesafb_exec(task);
518 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
519 printk(KERN_ERR "uvesafb: Getting mode info block "
520 "for mode 0x%x failed (eax=0x%x, err=%d)\n",
521 *mode, (u32)task->t.regs.eax, err);
522 return -EINVAL;
523 }
524
525 mib = task->buf;
526 mib->mode_id = *mode;
527
528 /*
529 * We only want modes that are supported with the current
530 * hardware configuration, color, graphics and that have
531 * support for the LFB.
532 */
533 if ((mib->mode_attr & VBE_MODE_MASK) == VBE_MODE_MASK &&
534 mib->bits_per_pixel >= 8)
535 off++;
536 else
537 par->vbe_modes_cnt--;
538
539 mode++;
540 mib->depth = mib->red_len + mib->green_len + mib->blue_len;
541
542 /*
543 * Handle 8bpp modes and modes with broken color component
544 * lengths.
545 */
546 if (mib->depth == 0 || (mib->depth == 24 &&
547 mib->bits_per_pixel == 32))
548 mib->depth = mib->bits_per_pixel;
549 }
550
551 return 0;
552 }
553
554 /*
555 * The Protected Mode Interface is 32-bit x86 code, so we only run it on
556 * x86 and not x86_64.
557 */
558 #ifdef CONFIG_X86_32
559 static int __devinit uvesafb_vbe_getpmi(struct uvesafb_ktask *task,
560 struct uvesafb_par *par)
561 {
562 int i, err;
563
564 uvesafb_reset(task);
565 task->t.regs.eax = 0x4f0a;
566 task->t.regs.ebx = 0x0;
567 err = uvesafb_exec(task);
568
569 if ((task->t.regs.eax & 0xffff) != 0x4f || task->t.regs.es < 0xc000) {
570 par->pmi_setpal = par->ypan = 0;
571 } else {
572 par->pmi_base = (u16 *)phys_to_virt(((u32)task->t.regs.es << 4)
573 + task->t.regs.edi);
574 par->pmi_start = (u8 *)par->pmi_base + par->pmi_base[1];
575 par->pmi_pal = (u8 *)par->pmi_base + par->pmi_base[2];
576 printk(KERN_INFO "uvesafb: protected mode interface info at "
577 "%04x:%04x\n",
578 (u16)task->t.regs.es, (u16)task->t.regs.edi);
579 printk(KERN_INFO "uvesafb: pmi: set display start = %p, "
580 "set palette = %p\n", par->pmi_start,
581 par->pmi_pal);
582
583 if (par->pmi_base[3]) {
584 printk(KERN_INFO "uvesafb: pmi: ports = ");
585 for (i = par->pmi_base[3]/2;
586 par->pmi_base[i] != 0xffff; i++)
587 printk("%x ", par->pmi_base[i]);
588 printk("\n");
589
590 if (par->pmi_base[i] != 0xffff) {
591 printk(KERN_INFO "uvesafb: can't handle memory"
592 " requests, pmi disabled\n");
593 par->ypan = par->pmi_setpal = 0;
594 }
595 }
596 }
597 return 0;
598 }
599 #endif /* CONFIG_X86_32 */
600
601 /*
602 * Check whether a video mode is supported by the Video BIOS and is
603 * compatible with the monitor limits.
604 */
605 static int __devinit uvesafb_is_valid_mode(struct fb_videomode *mode,
606 struct fb_info *info)
607 {
608 if (info->monspecs.gtf) {
609 fb_videomode_to_var(&info->var, mode);
610 if (fb_validate_mode(&info->var, info))
611 return 0;
612 }
613
614 if (uvesafb_vbe_find_mode(info->par, mode->xres, mode->yres, 8,
615 UVESAFB_EXACT_RES) == -1)
616 return 0;
617
618 return 1;
619 }
620
621 static int __devinit uvesafb_vbe_getedid(struct uvesafb_ktask *task,
622 struct fb_info *info)
623 {
624 struct uvesafb_par *par = info->par;
625 int err = 0;
626
627 if (noedid || par->vbe_ib.vbe_version < 0x0300)
628 return -EINVAL;
629
630 task->t.regs.eax = 0x4f15;
631 task->t.regs.ebx = 0;
632 task->t.regs.ecx = 0;
633 task->t.buf_len = 0;
634 task->t.flags = 0;
635
636 err = uvesafb_exec(task);
637
638 if ((task->t.regs.eax & 0xffff) != 0x004f || err)
639 return -EINVAL;
640
641 if ((task->t.regs.ebx & 0x3) == 3) {
642 printk(KERN_INFO "uvesafb: VBIOS/hardware supports both "
643 "DDC1 and DDC2 transfers\n");
644 } else if ((task->t.regs.ebx & 0x3) == 2) {
645 printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC2 "
646 "transfers\n");
647 } else if ((task->t.regs.ebx & 0x3) == 1) {
648 printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC1 "
649 "transfers\n");
650 } else {
651 printk(KERN_INFO "uvesafb: VBIOS/hardware doesn't support "
652 "DDC transfers\n");
653 return -EINVAL;
654 }
655
656 task->t.regs.eax = 0x4f15;
657 task->t.regs.ebx = 1;
658 task->t.regs.ecx = task->t.regs.edx = 0;
659 task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
660 task->t.buf_len = EDID_LENGTH;
661 task->buf = kzalloc(EDID_LENGTH, GFP_KERNEL);
662
663 err = uvesafb_exec(task);
664
665 if ((task->t.regs.eax & 0xffff) == 0x004f && !err) {
666 fb_edid_to_monspecs(task->buf, &info->monspecs);
667
668 if (info->monspecs.vfmax && info->monspecs.hfmax) {
669 /*
670 * If the maximum pixel clock wasn't specified in
671 * the EDID block, set it to 300 MHz.
672 */
673 if (info->monspecs.dclkmax == 0)
674 info->monspecs.dclkmax = 300 * 1000000;
675 info->monspecs.gtf = 1;
676 }
677 } else {
678 err = -EINVAL;
679 }
680
681 kfree(task->buf);
682 return err;
683 }
684
685 static void __devinit uvesafb_vbe_getmonspecs(struct uvesafb_ktask *task,
686 struct fb_info *info)
687 {
688 struct uvesafb_par *par = info->par;
689 int i;
690
691 memset(&info->monspecs, 0, sizeof(info->monspecs));
692
693 /*
694 * If we don't get all necessary data from the EDID block,
695 * mark it as incompatible with the GTF and set nocrtc so
696 * that we always use the default BIOS refresh rate.
697 */
698 if (uvesafb_vbe_getedid(task, info)) {
699 info->monspecs.gtf = 0;
700 par->nocrtc = 1;
701 }
702
703 /* Kernel command line overrides. */
704 if (maxclk)
705 info->monspecs.dclkmax = maxclk * 1000000;
706 if (maxvf)
707 info->monspecs.vfmax = maxvf;
708 if (maxhf)
709 info->monspecs.hfmax = maxhf * 1000;
710
711 /*
712 * In case DDC transfers are not supported, the user can provide
713 * monitor limits manually. Lower limits are set to "safe" values.
714 */
715 if (info->monspecs.gtf == 0 && maxclk && maxvf && maxhf) {
716 info->monspecs.dclkmin = 0;
717 info->monspecs.vfmin = 60;
718 info->monspecs.hfmin = 29000;
719 info->monspecs.gtf = 1;
720 par->nocrtc = 0;
721 }
722
723 if (info->monspecs.gtf)
724 printk(KERN_INFO
725 "uvesafb: monitor limits: vf = %d Hz, hf = %d kHz, "
726 "clk = %d MHz\n", info->monspecs.vfmax,
727 (int)(info->monspecs.hfmax / 1000),
728 (int)(info->monspecs.dclkmax / 1000000));
729 else
730 printk(KERN_INFO "uvesafb: no monitor limits have been set, "
731 "default refresh rate will be used\n");
732
733 /* Add VBE modes to the modelist. */
734 for (i = 0; i < par->vbe_modes_cnt; i++) {
735 struct fb_var_screeninfo var;
736 struct vbe_mode_ib *mode;
737 struct fb_videomode vmode;
738
739 mode = &par->vbe_modes[i];
740 memset(&var, 0, sizeof(var));
741
742 var.xres = mode->x_res;
743 var.yres = mode->y_res;
744
745 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, &var, info);
746 fb_var_to_videomode(&vmode, &var);
747 fb_add_videomode(&vmode, &info->modelist);
748 }
749
750 /* Add valid VESA modes to our modelist. */
751 for (i = 0; i < VESA_MODEDB_SIZE; i++) {
752 if (uvesafb_is_valid_mode((struct fb_videomode *)
753 &vesa_modes[i], info))
754 fb_add_videomode(&vesa_modes[i], &info->modelist);
755 }
756
757 for (i = 0; i < info->monspecs.modedb_len; i++) {
758 if (uvesafb_is_valid_mode(&info->monspecs.modedb[i], info))
759 fb_add_videomode(&info->monspecs.modedb[i],
760 &info->modelist);
761 }
762
763 return;
764 }
765
766 static void __devinit uvesafb_vbe_getstatesize(struct uvesafb_ktask *task,
767 struct uvesafb_par *par)
768 {
769 int err;
770
771 uvesafb_reset(task);
772
773 /*
774 * Get the VBE state buffer size. We want all available
775 * hardware state data (CL = 0x0f).
776 */
777 task->t.regs.eax = 0x4f04;
778 task->t.regs.ecx = 0x000f;
779 task->t.regs.edx = 0x0000;
780 task->t.flags = 0;
781
782 err = uvesafb_exec(task);
783
784 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
785 printk(KERN_WARNING "uvesafb: VBE state buffer size "
786 "cannot be determined (eax=0x%x, err=%d)\n",
787 task->t.regs.eax, err);
788 par->vbe_state_size = 0;
789 return;
790 }
791
792 par->vbe_state_size = 64 * (task->t.regs.ebx & 0xffff);
793 }
794
795 static int __devinit uvesafb_vbe_init(struct fb_info *info)
796 {
797 struct uvesafb_ktask *task = NULL;
798 struct uvesafb_par *par = info->par;
799 int err;
800
801 task = uvesafb_prep();
802 if (!task)
803 return -ENOMEM;
804
805 err = uvesafb_vbe_getinfo(task, par);
806 if (err)
807 goto out;
808
809 err = uvesafb_vbe_getmodes(task, par);
810 if (err)
811 goto out;
812
813 par->nocrtc = nocrtc;
814 #ifdef CONFIG_X86_32
815 par->pmi_setpal = pmi_setpal;
816 par->ypan = ypan;
817
818 if (par->pmi_setpal || par->ypan)
819 uvesafb_vbe_getpmi(task, par);
820 #else
821 /* The protected mode interface is not available on non-x86. */
822 par->pmi_setpal = par->ypan = 0;
823 #endif
824
825 INIT_LIST_HEAD(&info->modelist);
826 uvesafb_vbe_getmonspecs(task, info);
827 uvesafb_vbe_getstatesize(task, par);
828
829 out: uvesafb_free(task);
830 return err;
831 }
832
833 static int __devinit uvesafb_vbe_init_mode(struct fb_info *info)
834 {
835 struct list_head *pos;
836 struct fb_modelist *modelist;
837 struct fb_videomode *mode;
838 struct uvesafb_par *par = info->par;
839 int i, modeid;
840
841 /* Has the user requested a specific VESA mode? */
842 if (vbemode) {
843 for (i = 0; i < par->vbe_modes_cnt; i++) {
844 if (par->vbe_modes[i].mode_id == vbemode) {
845 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
846 &info->var, info);
847 /*
848 * With pixclock set to 0, the default BIOS
849 * timings will be used in set_par().
850 */
851 info->var.pixclock = 0;
852 modeid = i;
853 goto gotmode;
854 }
855 }
856 printk(KERN_INFO "uvesafb: requested VBE mode 0x%x is "
857 "unavailable\n", vbemode);
858 vbemode = 0;
859 }
860
861 /* Count the modes in the modelist */
862 i = 0;
863 list_for_each(pos, &info->modelist)
864 i++;
865
866 /*
867 * Convert the modelist into a modedb so that we can use it with
868 * fb_find_mode().
869 */
870 mode = kzalloc(i * sizeof(*mode), GFP_KERNEL);
871 if (mode) {
872 i = 0;
873 list_for_each(pos, &info->modelist) {
874 modelist = list_entry(pos, struct fb_modelist, list);
875 mode[i] = modelist->mode;
876 i++;
877 }
878
879 if (!mode_option)
880 mode_option = UVESAFB_DEFAULT_MODE;
881
882 i = fb_find_mode(&info->var, info, mode_option, mode, i,
883 NULL, 8);
884
885 kfree(mode);
886 }
887
888 /* fb_find_mode() failed */
889 if (i == 0) {
890 info->var.xres = 640;
891 info->var.yres = 480;
892 mode = (struct fb_videomode *)
893 fb_find_best_mode(&info->var, &info->modelist);
894
895 if (mode) {
896 fb_videomode_to_var(&info->var, mode);
897 } else {
898 modeid = par->vbe_modes[0].mode_id;
899 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
900 &info->var, info);
901 goto gotmode;
902 }
903 }
904
905 /* Look for a matching VBE mode. */
906 modeid = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres,
907 info->var.bits_per_pixel, UVESAFB_EXACT_RES);
908
909 if (modeid == -1)
910 return -EINVAL;
911
912 gotmode:
913 uvesafb_setup_var(&info->var, info, &par->vbe_modes[modeid]);
914
915 /*
916 * If we are not VBE3.0+ compliant, we're done -- the BIOS will
917 * ignore our timings anyway.
918 */
919 if (par->vbe_ib.vbe_version < 0x0300 || par->nocrtc)
920 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
921 &info->var, info);
922
923 return modeid;
924 }
925
926 static int uvesafb_setpalette(struct uvesafb_pal_entry *entries, int count,
927 int start, struct fb_info *info)
928 {
929 struct uvesafb_ktask *task;
930 #ifdef CONFIG_X86
931 struct uvesafb_par *par = info->par;
932 int i = par->mode_idx;
933 #endif
934 int err = 0;
935
936 /*
937 * We support palette modifications for 8 bpp modes only, so
938 * there can never be more than 256 entries.
939 */
940 if (start + count > 256)
941 return -EINVAL;
942
943 #ifdef CONFIG_X86
944 /* Use VGA registers if mode is VGA-compatible. */
945 if (i >= 0 && i < par->vbe_modes_cnt &&
946 par->vbe_modes[i].mode_attr & VBE_MODE_VGACOMPAT) {
947 for (i = 0; i < count; i++) {
948 outb_p(start + i, dac_reg);
949 outb_p(entries[i].red, dac_val);
950 outb_p(entries[i].green, dac_val);
951 outb_p(entries[i].blue, dac_val);
952 }
953 }
954 #ifdef CONFIG_X86_32
955 else if (par->pmi_setpal) {
956 __asm__ __volatile__(
957 "call *(%%esi)"
958 : /* no return value */
959 : "a" (0x4f09), /* EAX */
960 "b" (0), /* EBX */
961 "c" (count), /* ECX */
962 "d" (start), /* EDX */
963 "D" (entries), /* EDI */
964 "S" (&par->pmi_pal)); /* ESI */
965 }
966 #endif /* CONFIG_X86_32 */
967 else
968 #endif /* CONFIG_X86 */
969 {
970 task = uvesafb_prep();
971 if (!task)
972 return -ENOMEM;
973
974 task->t.regs.eax = 0x4f09;
975 task->t.regs.ebx = 0x0;
976 task->t.regs.ecx = count;
977 task->t.regs.edx = start;
978 task->t.flags = TF_BUF_ESDI;
979 task->t.buf_len = sizeof(struct uvesafb_pal_entry) * count;
980 task->buf = entries;
981
982 err = uvesafb_exec(task);
983 if ((task->t.regs.eax & 0xffff) != 0x004f)
984 err = 1;
985
986 uvesafb_free(task);
987 }
988 return err;
989 }
990
991 static int uvesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
992 unsigned blue, unsigned transp,
993 struct fb_info *info)
994 {
995 struct uvesafb_pal_entry entry;
996 int shift = 16 - info->var.green.length;
997 int err = 0;
998
999 if (regno >= info->cmap.len)
1000 return -EINVAL;
1001
1002 if (info->var.bits_per_pixel == 8) {
1003 entry.red = red >> shift;
1004 entry.green = green >> shift;
1005 entry.blue = blue >> shift;
1006 entry.pad = 0;
1007
1008 err = uvesafb_setpalette(&entry, 1, regno, info);
1009 } else if (regno < 16) {
1010 switch (info->var.bits_per_pixel) {
1011 case 16:
1012 if (info->var.red.offset == 10) {
1013 /* 1:5:5:5 */
1014 ((u32 *) (info->pseudo_palette))[regno] =
1015 ((red & 0xf800) >> 1) |
1016 ((green & 0xf800) >> 6) |
1017 ((blue & 0xf800) >> 11);
1018 } else {
1019 /* 0:5:6:5 */
1020 ((u32 *) (info->pseudo_palette))[regno] =
1021 ((red & 0xf800) ) |
1022 ((green & 0xfc00) >> 5) |
1023 ((blue & 0xf800) >> 11);
1024 }
1025 break;
1026
1027 case 24:
1028 case 32:
1029 red >>= 8;
1030 green >>= 8;
1031 blue >>= 8;
1032 ((u32 *)(info->pseudo_palette))[regno] =
1033 (red << info->var.red.offset) |
1034 (green << info->var.green.offset) |
1035 (blue << info->var.blue.offset);
1036 break;
1037 }
1038 }
1039 return err;
1040 }
1041
1042 static int uvesafb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
1043 {
1044 struct uvesafb_pal_entry *entries;
1045 int shift = 16 - info->var.green.length;
1046 int i, err = 0;
1047
1048 if (info->var.bits_per_pixel == 8) {
1049 if (cmap->start + cmap->len > info->cmap.start +
1050 info->cmap.len || cmap->start < info->cmap.start)
1051 return -EINVAL;
1052
1053 entries = kmalloc(sizeof(*entries) * cmap->len, GFP_KERNEL);
1054 if (!entries)
1055 return -ENOMEM;
1056
1057 for (i = 0; i < cmap->len; i++) {
1058 entries[i].red = cmap->red[i] >> shift;
1059 entries[i].green = cmap->green[i] >> shift;
1060 entries[i].blue = cmap->blue[i] >> shift;
1061 entries[i].pad = 0;
1062 }
1063 err = uvesafb_setpalette(entries, cmap->len, cmap->start, info);
1064 kfree(entries);
1065 } else {
1066 /*
1067 * For modes with bpp > 8, we only set the pseudo palette in
1068 * the fb_info struct. We rely on uvesafb_setcolreg to do all
1069 * sanity checking.
1070 */
1071 for (i = 0; i < cmap->len; i++) {
1072 err |= uvesafb_setcolreg(cmap->start + i, cmap->red[i],
1073 cmap->green[i], cmap->blue[i],
1074 0, info);
1075 }
1076 }
1077 return err;
1078 }
1079
1080 static int uvesafb_pan_display(struct fb_var_screeninfo *var,
1081 struct fb_info *info)
1082 {
1083 #ifdef CONFIG_X86_32
1084 int offset;
1085 struct uvesafb_par *par = info->par;
1086
1087 offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;
1088
1089 /*
1090 * It turns out it's not the best idea to do panning via vm86,
1091 * so we only allow it if we have a PMI.
1092 */
1093 if (par->pmi_start) {
1094 __asm__ __volatile__(
1095 "call *(%%edi)"
1096 : /* no return value */
1097 : "a" (0x4f07), /* EAX */
1098 "b" (0), /* EBX */
1099 "c" (offset), /* ECX */
1100 "d" (offset >> 16), /* EDX */
1101 "D" (&par->pmi_start)); /* EDI */
1102 }
1103 #endif
1104 return 0;
1105 }
1106
1107 static int uvesafb_blank(int blank, struct fb_info *info)
1108 {
1109 struct uvesafb_ktask *task;
1110 int err = 1;
1111 #ifdef CONFIG_X86
1112 struct uvesafb_par *par = info->par;
1113
1114 if (par->vbe_ib.capabilities & VBE_CAP_VGACOMPAT) {
1115 int loop = 10000;
1116 u8 seq = 0, crtc17 = 0;
1117
1118 if (blank == FB_BLANK_POWERDOWN) {
1119 seq = 0x20;
1120 crtc17 = 0x00;
1121 err = 0;
1122 } else {
1123 seq = 0x00;
1124 crtc17 = 0x80;
1125 err = (blank == FB_BLANK_UNBLANK) ? 0 : -EINVAL;
1126 }
1127
1128 vga_wseq(NULL, 0x00, 0x01);
1129 seq |= vga_rseq(NULL, 0x01) & ~0x20;
1130 vga_wseq(NULL, 0x00, seq);
1131
1132 crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80;
1133 while (loop--);
1134 vga_wcrt(NULL, 0x17, crtc17);
1135 vga_wseq(NULL, 0x00, 0x03);
1136 } else
1137 #endif /* CONFIG_X86 */
1138 {
1139 task = uvesafb_prep();
1140 if (!task)
1141 return -ENOMEM;
1142
1143 task->t.regs.eax = 0x4f10;
1144 switch (blank) {
1145 case FB_BLANK_UNBLANK:
1146 task->t.regs.ebx = 0x0001;
1147 break;
1148 case FB_BLANK_NORMAL:
1149 task->t.regs.ebx = 0x0101; /* standby */
1150 break;
1151 case FB_BLANK_POWERDOWN:
1152 task->t.regs.ebx = 0x0401; /* powerdown */
1153 break;
1154 default:
1155 goto out;
1156 }
1157
1158 err = uvesafb_exec(task);
1159 if (err || (task->t.regs.eax & 0xffff) != 0x004f)
1160 err = 1;
1161 out: uvesafb_free(task);
1162 }
1163 return err;
1164 }
1165
1166 static int uvesafb_open(struct fb_info *info, int user)
1167 {
1168 struct uvesafb_par *par = info->par;
1169 int cnt = atomic_read(&par->ref_count);
1170
1171 if (!cnt && par->vbe_state_size)
1172 par->vbe_state_orig = uvesafb_vbe_state_save(par);
1173
1174 atomic_inc(&par->ref_count);
1175 return 0;
1176 }
1177
1178 static int uvesafb_release(struct fb_info *info, int user)
1179 {
1180 struct uvesafb_ktask *task = NULL;
1181 struct uvesafb_par *par = info->par;
1182 int cnt = atomic_read(&par->ref_count);
1183
1184 if (!cnt)
1185 return -EINVAL;
1186
1187 if (cnt != 1)
1188 goto out;
1189
1190 task = uvesafb_prep();
1191 if (!task)
1192 goto out;
1193
1194 /* First, try to set the standard 80x25 text mode. */
1195 task->t.regs.eax = 0x0003;
1196 uvesafb_exec(task);
1197
1198 /*
1199 * Now try to restore whatever hardware state we might have
1200 * saved when the fb device was first opened.
1201 */
1202 uvesafb_vbe_state_restore(par, par->vbe_state_orig);
1203 out:
1204 atomic_dec(&par->ref_count);
1205 if (task)
1206 uvesafb_free(task);
1207 return 0;
1208 }
1209
1210 static int uvesafb_set_par(struct fb_info *info)
1211 {
1212 struct uvesafb_par *par = info->par;
1213 struct uvesafb_ktask *task = NULL;
1214 struct vbe_crtc_ib *crtc = NULL;
1215 struct vbe_mode_ib *mode = NULL;
1216 int i, err = 0, depth = info->var.bits_per_pixel;
1217
1218 if (depth > 8 && depth != 32)
1219 depth = info->var.red.length + info->var.green.length +
1220 info->var.blue.length;
1221
1222 i = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, depth,
1223 UVESAFB_EXACT_RES | UVESAFB_EXACT_DEPTH);
1224 if (i >= 0)
1225 mode = &par->vbe_modes[i];
1226 else
1227 return -EINVAL;
1228
1229 task = uvesafb_prep();
1230 if (!task)
1231 return -ENOMEM;
1232 setmode:
1233 task->t.regs.eax = 0x4f02;
1234 task->t.regs.ebx = mode->mode_id | 0x4000; /* use LFB */
1235
1236 if (par->vbe_ib.vbe_version >= 0x0300 && !par->nocrtc &&
1237 info->var.pixclock != 0) {
1238 task->t.regs.ebx |= 0x0800; /* use CRTC data */
1239 task->t.flags = TF_BUF_ESDI;
1240 crtc = kzalloc(sizeof(struct vbe_crtc_ib), GFP_KERNEL);
1241 if (!crtc) {
1242 err = -ENOMEM;
1243 goto out;
1244 }
1245 crtc->horiz_start = info->var.xres + info->var.right_margin;
1246 crtc->horiz_end = crtc->horiz_start + info->var.hsync_len;
1247 crtc->horiz_total = crtc->horiz_end + info->var.left_margin;
1248
1249 crtc->vert_start = info->var.yres + info->var.lower_margin;
1250 crtc->vert_end = crtc->vert_start + info->var.vsync_len;
1251 crtc->vert_total = crtc->vert_end + info->var.upper_margin;
1252
1253 crtc->pixel_clock = PICOS2KHZ(info->var.pixclock) * 1000;
1254 crtc->refresh_rate = (u16)(100 * (crtc->pixel_clock /
1255 (crtc->vert_total * crtc->horiz_total)));
1256
1257 if (info->var.vmode & FB_VMODE_DOUBLE)
1258 crtc->flags |= 0x1;
1259 if (info->var.vmode & FB_VMODE_INTERLACED)
1260 crtc->flags |= 0x2;
1261 if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
1262 crtc->flags |= 0x4;
1263 if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
1264 crtc->flags |= 0x8;
1265 memcpy(&par->crtc, crtc, sizeof(*crtc));
1266 } else {
1267 memset(&par->crtc, 0, sizeof(*crtc));
1268 }
1269
1270 task->t.buf_len = sizeof(struct vbe_crtc_ib);
1271 task->buf = &par->crtc;
1272
1273 err = uvesafb_exec(task);
1274 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
1275 /*
1276 * The mode switch might have failed because we tried to
1277 * use our own timings. Try again with the default timings.
1278 */
1279 if (crtc != NULL) {
1280 printk(KERN_WARNING "uvesafb: mode switch failed "
1281 "(eax=0x%x, err=%d). Trying again with "
1282 "default timings.\n", task->t.regs.eax, err);
1283 uvesafb_reset(task);
1284 kfree(crtc);
1285 crtc = NULL;
1286 info->var.pixclock = 0;
1287 goto setmode;
1288 } else {
1289 printk(KERN_ERR "uvesafb: mode switch failed (eax="
1290 "0x%x, err=%d)\n", task->t.regs.eax, err);
1291 err = -EINVAL;
1292 goto out;
1293 }
1294 }
1295 par->mode_idx = i;
1296
1297 /* For 8bpp modes, always try to set the DAC to 8 bits. */
1298 if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC &&
1299 mode->bits_per_pixel <= 8) {
1300 uvesafb_reset(task);
1301 task->t.regs.eax = 0x4f08;
1302 task->t.regs.ebx = 0x0800;
1303
1304 err = uvesafb_exec(task);
1305 if (err || (task->t.regs.eax & 0xffff) != 0x004f ||
1306 ((task->t.regs.ebx & 0xff00) >> 8) != 8) {
1307 /*
1308 * We've failed to set the DAC palette format -
1309 * time to correct var.
1310 */
1311 info->var.red.length = 6;
1312 info->var.green.length = 6;
1313 info->var.blue.length = 6;
1314 }
1315 }
1316
1317 info->fix.visual = (info->var.bits_per_pixel == 8) ?
1318 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
1319 info->fix.line_length = mode->bytes_per_scan_line;
1320
1321 out: if (crtc != NULL)
1322 kfree(crtc);
1323 uvesafb_free(task);
1324
1325 return err;
1326 }
1327
1328 static void uvesafb_check_limits(struct fb_var_screeninfo *var,
1329 struct fb_info *info)
1330 {
1331 const struct fb_videomode *mode;
1332 struct uvesafb_par *par = info->par;
1333
1334 /*
1335 * If pixclock is set to 0, then we're using default BIOS timings
1336 * and thus don't have to perform any checks here.
1337 */
1338 if (!var->pixclock)
1339 return;
1340
1341 if (par->vbe_ib.vbe_version < 0x0300) {
1342 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, var, info);
1343 return;
1344 }
1345
1346 if (!fb_validate_mode(var, info))
1347 return;
1348
1349 mode = fb_find_best_mode(var, &info->modelist);
1350 if (mode) {
1351 if (mode->xres == var->xres && mode->yres == var->yres &&
1352 !(mode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))) {
1353 fb_videomode_to_var(var, mode);
1354 return;
1355 }
1356 }
1357
1358 if (info->monspecs.gtf && !fb_get_mode(FB_MAXTIMINGS, 0, var, info))
1359 return;
1360 /* Use default refresh rate */
1361 var->pixclock = 0;
1362 }
1363
1364 static int uvesafb_check_var(struct fb_var_screeninfo *var,
1365 struct fb_info *info)
1366 {
1367 struct uvesafb_par *par = info->par;
1368 struct vbe_mode_ib *mode = NULL;
1369 int match = -1;
1370 int depth = var->red.length + var->green.length + var->blue.length;
1371
1372 /*
1373 * Various apps will use bits_per_pixel to set the color depth,
1374 * which is theoretically incorrect, but which we'll try to handle
1375 * here.
1376 */
1377 if (depth == 0 || abs(depth - var->bits_per_pixel) >= 8)
1378 depth = var->bits_per_pixel;
1379
1380 match = uvesafb_vbe_find_mode(par, var->xres, var->yres, depth,
1381 UVESAFB_EXACT_RES);
1382 if (match == -1)
1383 return -EINVAL;
1384
1385 mode = &par->vbe_modes[match];
1386 uvesafb_setup_var(var, info, mode);
1387
1388 /*
1389 * Check whether we have remapped enough memory for this mode.
1390 * We might be called at an early stage, when we haven't remapped
1391 * any memory yet, in which case we simply skip the check.
1392 */
1393 if (var->yres * mode->bytes_per_scan_line > info->fix.smem_len
1394 && info->fix.smem_len)
1395 return -EINVAL;
1396
1397 if ((var->vmode & FB_VMODE_DOUBLE) &&
1398 !(par->vbe_modes[match].mode_attr & 0x100))
1399 var->vmode &= ~FB_VMODE_DOUBLE;
1400
1401 if ((var->vmode & FB_VMODE_INTERLACED) &&
1402 !(par->vbe_modes[match].mode_attr & 0x200))
1403 var->vmode &= ~FB_VMODE_INTERLACED;
1404
1405 uvesafb_check_limits(var, info);
1406
1407 var->xres_virtual = var->xres;
1408 var->yres_virtual = (par->ypan) ?
1409 info->fix.smem_len / mode->bytes_per_scan_line :
1410 var->yres;
1411 return 0;
1412 }
1413
1414 static void uvesafb_save_state(struct fb_info *info)
1415 {
1416 struct uvesafb_par *par = info->par;
1417
1418 if (par->vbe_state_saved)
1419 kfree(par->vbe_state_saved);
1420
1421 par->vbe_state_saved = uvesafb_vbe_state_save(par);
1422 }
1423
1424 static void uvesafb_restore_state(struct fb_info *info)
1425 {
1426 struct uvesafb_par *par = info->par;
1427
1428 uvesafb_vbe_state_restore(par, par->vbe_state_saved);
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 .fb_save_state = uvesafb_save_state,
1445 .fb_restore_state = uvesafb_restore_state,
1446 };
1447
1448 static void __devinit uvesafb_init_info(struct fb_info *info,
1449 struct vbe_mode_ib *mode)
1450 {
1451 unsigned int size_vmode;
1452 unsigned int size_remap;
1453 unsigned int size_total;
1454 struct uvesafb_par *par = info->par;
1455 int i, h;
1456
1457 info->pseudo_palette = ((u8 *)info->par + sizeof(struct uvesafb_par));
1458 info->fix = uvesafb_fix;
1459 info->fix.ypanstep = par->ypan ? 1 : 0;
1460 info->fix.ywrapstep = (par->ypan > 1) ? 1 : 0;
1461
1462 /*
1463 * If we were unable to get the state buffer size, disable
1464 * functions for saving and restoring the hardware state.
1465 */
1466 if (par->vbe_state_size == 0) {
1467 info->fbops->fb_save_state = NULL;
1468 info->fbops->fb_restore_state = NULL;
1469 }
1470
1471 /* Disable blanking if the user requested so. */
1472 if (!blank)
1473 info->fbops->fb_blank = NULL;
1474
1475 /*
1476 * Find out how much IO memory is required for the mode with
1477 * the highest resolution.
1478 */
1479 size_remap = 0;
1480 for (i = 0; i < par->vbe_modes_cnt; i++) {
1481 h = par->vbe_modes[i].bytes_per_scan_line *
1482 par->vbe_modes[i].y_res;
1483 if (h > size_remap)
1484 size_remap = h;
1485 }
1486 size_remap *= 2;
1487
1488 /*
1489 * size_vmode -- that is the amount of memory needed for the
1490 * used video mode, i.e. the minimum amount of
1491 * memory we need.
1492 */
1493 if (mode != NULL) {
1494 size_vmode = info->var.yres * mode->bytes_per_scan_line;
1495 } else {
1496 size_vmode = info->var.yres * info->var.xres *
1497 ((info->var.bits_per_pixel + 7) >> 3);
1498 }
1499
1500 /*
1501 * size_total -- all video memory we have. Used for mtrr
1502 * entries, resource allocation and bounds
1503 * checking.
1504 */
1505 size_total = par->vbe_ib.total_memory * 65536;
1506 if (vram_total)
1507 size_total = vram_total * 1024 * 1024;
1508 if (size_total < size_vmode)
1509 size_total = size_vmode;
1510
1511 /*
1512 * size_remap -- the amount of video memory we are going to
1513 * use for vesafb. With modern cards it is no
1514 * option to simply use size_total as th
1515 * wastes plenty of kernel address space.
1516 */
1517 if (vram_remap)
1518 size_remap = vram_remap * 1024 * 1024;
1519 if (size_remap < size_vmode)
1520 size_remap = size_vmode;
1521 if (size_remap > size_total)
1522 size_remap = size_total;
1523
1524 info->fix.smem_len = size_remap;
1525 info->fix.smem_start = mode->phys_base_ptr;
1526
1527 /*
1528 * We have to set yres_virtual here because when setup_var() was
1529 * called, smem_len wasn't defined yet.
1530 */
1531 info->var.yres_virtual = info->fix.smem_len /
1532 mode->bytes_per_scan_line;
1533
1534 if (par->ypan && info->var.yres_virtual > info->var.yres) {
1535 printk(KERN_INFO "uvesafb: scrolling: %s "
1536 "using protected mode interface, "
1537 "yres_virtual=%d\n",
1538 (par->ypan > 1) ? "ywrap" : "ypan",
1539 info->var.yres_virtual);
1540 } else {
1541 printk(KERN_INFO "uvesafb: scrolling: redraw\n");
1542 info->var.yres_virtual = info->var.yres;
1543 par->ypan = 0;
1544 }
1545
1546 info->flags = FBINFO_FLAG_DEFAULT |
1547 (par->ypan) ? FBINFO_HWACCEL_YPAN : 0;
1548
1549 if (!par->ypan)
1550 info->fbops->fb_pan_display = NULL;
1551 }
1552
1553 static void __devinit uvesafb_init_mtrr(struct fb_info *info)
1554 {
1555 #ifdef CONFIG_MTRR
1556 if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) {
1557 int temp_size = info->fix.smem_len;
1558 unsigned int type = 0;
1559
1560 switch (mtrr) {
1561 case 1:
1562 type = MTRR_TYPE_UNCACHABLE;
1563 break;
1564 case 2:
1565 type = MTRR_TYPE_WRBACK;
1566 break;
1567 case 3:
1568 type = MTRR_TYPE_WRCOMB;
1569 break;
1570 case 4:
1571 type = MTRR_TYPE_WRTHROUGH;
1572 break;
1573 default:
1574 type = 0;
1575 break;
1576 }
1577
1578 if (type) {
1579 int rc;
1580
1581 /* Find the largest power-of-two */
1582 while (temp_size & (temp_size - 1))
1583 temp_size &= (temp_size - 1);
1584
1585 /* Try and find a power of two to add */
1586 do {
1587 rc = mtrr_add(info->fix.smem_start,
1588 temp_size, type, 1);
1589 temp_size >>= 1;
1590 } while (temp_size >= PAGE_SIZE && rc == -EINVAL);
1591 }
1592 }
1593 #endif /* CONFIG_MTRR */
1594 }
1595
1596
1597 static ssize_t uvesafb_show_vbe_ver(struct device *dev,
1598 struct device_attribute *attr, char *buf)
1599 {
1600 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1601 struct uvesafb_par *par = info->par;
1602
1603 return snprintf(buf, PAGE_SIZE, "%.4x\n", par->vbe_ib.vbe_version);
1604 }
1605
1606 static DEVICE_ATTR(vbe_version, S_IRUGO, uvesafb_show_vbe_ver, NULL);
1607
1608 static ssize_t uvesafb_show_vbe_modes(struct device *dev,
1609 struct device_attribute *attr, char *buf)
1610 {
1611 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1612 struct uvesafb_par *par = info->par;
1613 int ret = 0, i;
1614
1615 for (i = 0; i < par->vbe_modes_cnt && ret < PAGE_SIZE; i++) {
1616 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1617 "%dx%d-%d, 0x%.4x\n",
1618 par->vbe_modes[i].x_res, par->vbe_modes[i].y_res,
1619 par->vbe_modes[i].depth, par->vbe_modes[i].mode_id);
1620 }
1621
1622 return ret;
1623 }
1624
1625 static DEVICE_ATTR(vbe_modes, S_IRUGO, uvesafb_show_vbe_modes, NULL);
1626
1627 static ssize_t uvesafb_show_vendor(struct device *dev,
1628 struct device_attribute *attr, char *buf)
1629 {
1630 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1631 struct uvesafb_par *par = info->par;
1632
1633 if (par->vbe_ib.oem_vendor_name_ptr)
1634 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1635 (&par->vbe_ib) + par->vbe_ib.oem_vendor_name_ptr);
1636 else
1637 return 0;
1638 }
1639
1640 static DEVICE_ATTR(oem_vendor, S_IRUGO, uvesafb_show_vendor, NULL);
1641
1642 static ssize_t uvesafb_show_product_name(struct device *dev,
1643 struct device_attribute *attr, char *buf)
1644 {
1645 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1646 struct uvesafb_par *par = info->par;
1647
1648 if (par->vbe_ib.oem_product_name_ptr)
1649 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1650 (&par->vbe_ib) + par->vbe_ib.oem_product_name_ptr);
1651 else
1652 return 0;
1653 }
1654
1655 static DEVICE_ATTR(oem_product_name, S_IRUGO, uvesafb_show_product_name, NULL);
1656
1657 static ssize_t uvesafb_show_product_rev(struct device *dev,
1658 struct device_attribute *attr, char *buf)
1659 {
1660 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1661 struct uvesafb_par *par = info->par;
1662
1663 if (par->vbe_ib.oem_product_rev_ptr)
1664 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1665 (&par->vbe_ib) + par->vbe_ib.oem_product_rev_ptr);
1666 else
1667 return 0;
1668 }
1669
1670 static DEVICE_ATTR(oem_product_rev, S_IRUGO, uvesafb_show_product_rev, NULL);
1671
1672 static ssize_t uvesafb_show_oem_string(struct device *dev,
1673 struct device_attribute *attr, char *buf)
1674 {
1675 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1676 struct uvesafb_par *par = info->par;
1677
1678 if (par->vbe_ib.oem_string_ptr)
1679 return snprintf(buf, PAGE_SIZE, "%s\n",
1680 (char *)(&par->vbe_ib) + par->vbe_ib.oem_string_ptr);
1681 else
1682 return 0;
1683 }
1684
1685 static DEVICE_ATTR(oem_string, S_IRUGO, uvesafb_show_oem_string, NULL);
1686
1687 static ssize_t uvesafb_show_nocrtc(struct device *dev,
1688 struct device_attribute *attr, char *buf)
1689 {
1690 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1691 struct uvesafb_par *par = info->par;
1692
1693 return snprintf(buf, PAGE_SIZE, "%d\n", par->nocrtc);
1694 }
1695
1696 static ssize_t uvesafb_store_nocrtc(struct device *dev,
1697 struct device_attribute *attr, const char *buf, size_t count)
1698 {
1699 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1700 struct uvesafb_par *par = info->par;
1701
1702 if (count > 0) {
1703 if (buf[0] == '0')
1704 par->nocrtc = 0;
1705 else
1706 par->nocrtc = 1;
1707 }
1708 return count;
1709 }
1710
1711 static DEVICE_ATTR(nocrtc, S_IRUGO | S_IWUSR, uvesafb_show_nocrtc,
1712 uvesafb_store_nocrtc);
1713
1714 static struct attribute *uvesafb_dev_attrs[] = {
1715 &dev_attr_vbe_version.attr,
1716 &dev_attr_vbe_modes.attr,
1717 &dev_attr_oem_vendor.attr,
1718 &dev_attr_oem_product_name.attr,
1719 &dev_attr_oem_product_rev.attr,
1720 &dev_attr_oem_string.attr,
1721 &dev_attr_nocrtc.attr,
1722 NULL,
1723 };
1724
1725 static struct attribute_group uvesafb_dev_attgrp = {
1726 .name = NULL,
1727 .attrs = uvesafb_dev_attrs,
1728 };
1729
1730 static int __devinit uvesafb_probe(struct platform_device *dev)
1731 {
1732 struct fb_info *info;
1733 struct vbe_mode_ib *mode = NULL;
1734 struct uvesafb_par *par;
1735 int err = 0, i;
1736
1737 info = framebuffer_alloc(sizeof(*par) + sizeof(u32) * 256, &dev->dev);
1738 if (!info)
1739 return -ENOMEM;
1740
1741 par = info->par;
1742
1743 err = uvesafb_vbe_init(info);
1744 if (err) {
1745 printk(KERN_ERR "uvesafb: vbe_init() failed with %d\n", err);
1746 goto out;
1747 }
1748
1749 info->fbops = &uvesafb_ops;
1750
1751 i = uvesafb_vbe_init_mode(info);
1752 if (i < 0) {
1753 err = -EINVAL;
1754 goto out;
1755 } else {
1756 mode = &par->vbe_modes[i];
1757 }
1758
1759 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
1760 err = -ENXIO;
1761 goto out;
1762 }
1763
1764 uvesafb_init_info(info, mode);
1765
1766 if (!request_mem_region(info->fix.smem_start, info->fix.smem_len,
1767 "uvesafb")) {
1768 printk(KERN_ERR "uvesafb: cannot reserve video memory at "
1769 "0x%lx\n", info->fix.smem_start);
1770 err = -EIO;
1771 goto out_mode;
1772 }
1773
1774 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
1775
1776 if (!info->screen_base) {
1777 printk(KERN_ERR
1778 "uvesafb: abort, cannot ioremap 0x%x bytes of video "
1779 "memory at 0x%lx\n",
1780 info->fix.smem_len, info->fix.smem_start);
1781 err = -EIO;
1782 goto out_mem;
1783 }
1784
1785 if (!request_region(0x3c0, 32, "uvesafb")) {
1786 printk(KERN_ERR "uvesafb: request region 0x3c0-0x3e0 failed\n");
1787 err = -EIO;
1788 goto out_unmap;
1789 }
1790
1791 uvesafb_init_mtrr(info);
1792 platform_set_drvdata(dev, info);
1793
1794 if (register_framebuffer(info) < 0) {
1795 printk(KERN_ERR
1796 "uvesafb: failed to register framebuffer device\n");
1797 err = -EINVAL;
1798 goto out_reg;
1799 }
1800
1801 printk(KERN_INFO "uvesafb: framebuffer at 0x%lx, mapped to 0x%p, "
1802 "using %dk, total %dk\n", info->fix.smem_start,
1803 info->screen_base, info->fix.smem_len/1024,
1804 par->vbe_ib.total_memory * 64);
1805 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
1806 info->fix.id);
1807
1808 err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1809 if (err != 0)
1810 printk(KERN_WARNING "fb%d: failed to register attributes\n",
1811 info->node);
1812
1813 return 0;
1814
1815 out_reg:
1816 release_region(0x3c0, 32);
1817 out_unmap:
1818 iounmap(info->screen_base);
1819 out_mem:
1820 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1821 out_mode:
1822 if (!list_empty(&info->modelist))
1823 fb_destroy_modelist(&info->modelist);
1824 fb_destroy_modedb(info->monspecs.modedb);
1825 fb_dealloc_cmap(&info->cmap);
1826 out:
1827 if (par->vbe_modes)
1828 kfree(par->vbe_modes);
1829
1830 framebuffer_release(info);
1831 return err;
1832 }
1833
1834 static int uvesafb_remove(struct platform_device *dev)
1835 {
1836 struct fb_info *info = platform_get_drvdata(dev);
1837
1838 if (info) {
1839 struct uvesafb_par *par = info->par;
1840
1841 sysfs_remove_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1842 unregister_framebuffer(info);
1843 release_region(0x3c0, 32);
1844 iounmap(info->screen_base);
1845 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1846 fb_destroy_modedb(info->monspecs.modedb);
1847 fb_dealloc_cmap(&info->cmap);
1848
1849 if (par) {
1850 if (par->vbe_modes)
1851 kfree(par->vbe_modes);
1852 if (par->vbe_state_orig)
1853 kfree(par->vbe_state_orig);
1854 if (par->vbe_state_saved)
1855 kfree(par->vbe_state_saved);
1856 }
1857
1858 framebuffer_release(info);
1859 }
1860 return 0;
1861 }
1862
1863 static struct platform_driver uvesafb_driver = {
1864 .probe = uvesafb_probe,
1865 .remove = uvesafb_remove,
1866 .driver = {
1867 .name = "uvesafb",
1868 },
1869 };
1870
1871 static struct platform_device *uvesafb_device;
1872
1873 #ifndef MODULE
1874 static int __devinit uvesafb_setup(char *options)
1875 {
1876 char *this_opt;
1877
1878 if (!options || !*options)
1879 return 0;
1880
1881 while ((this_opt = strsep(&options, ",")) != NULL) {
1882 if (!*this_opt) continue;
1883
1884 if (!strcmp(this_opt, "redraw"))
1885 ypan = 0;
1886 else if (!strcmp(this_opt, "ypan"))
1887 ypan = 1;
1888 else if (!strcmp(this_opt, "ywrap"))
1889 ypan = 2;
1890 else if (!strcmp(this_opt, "vgapal"))
1891 pmi_setpal = 0;
1892 else if (!strcmp(this_opt, "pmipal"))
1893 pmi_setpal = 1;
1894 else if (!strncmp(this_opt, "mtrr:", 5))
1895 mtrr = simple_strtoul(this_opt+5, NULL, 0);
1896 else if (!strcmp(this_opt, "nomtrr"))
1897 mtrr = 0;
1898 else if (!strcmp(this_opt, "nocrtc"))
1899 nocrtc = 1;
1900 else if (!strcmp(this_opt, "noedid"))
1901 noedid = 1;
1902 else if (!strcmp(this_opt, "noblank"))
1903 blank = 0;
1904 else if (!strncmp(this_opt, "vtotal:", 7))
1905 vram_total = simple_strtoul(this_opt + 7, NULL, 0);
1906 else if (!strncmp(this_opt, "vremap:", 7))
1907 vram_remap = simple_strtoul(this_opt + 7, NULL, 0);
1908 else if (!strncmp(this_opt, "maxhf:", 6))
1909 maxhf = simple_strtoul(this_opt + 6, NULL, 0);
1910 else if (!strncmp(this_opt, "maxvf:", 6))
1911 maxvf = simple_strtoul(this_opt + 6, NULL, 0);
1912 else if (!strncmp(this_opt, "maxclk:", 7))
1913 maxclk = simple_strtoul(this_opt + 7, NULL, 0);
1914 else if (!strncmp(this_opt, "vbemode:", 8))
1915 vbemode = simple_strtoul(this_opt + 8, NULL, 0);
1916 else if (this_opt[0] >= '0' && this_opt[0] <= '9') {
1917 mode_option = this_opt;
1918 } else {
1919 printk(KERN_WARNING
1920 "uvesafb: unrecognized option %s\n", this_opt);
1921 }
1922 }
1923
1924 return 0;
1925 }
1926 #endif /* !MODULE */
1927
1928 static ssize_t show_v86d(struct device_driver *dev, char *buf)
1929 {
1930 return snprintf(buf, PAGE_SIZE, "%s\n", v86d_path);
1931 }
1932
1933 static ssize_t store_v86d(struct device_driver *dev, const char *buf,
1934 size_t count)
1935 {
1936 strncpy(v86d_path, buf, PATH_MAX);
1937 return count;
1938 }
1939
1940 static DRIVER_ATTR(v86d, S_IRUGO | S_IWUSR, show_v86d, store_v86d);
1941
1942 static int __devinit uvesafb_init(void)
1943 {
1944 int err;
1945
1946 #ifndef MODULE
1947 char *option = NULL;
1948
1949 if (fb_get_options("uvesafb", &option))
1950 return -ENODEV;
1951 uvesafb_setup(option);
1952 #endif
1953 err = cn_add_callback(&uvesafb_cn_id, "uvesafb", uvesafb_cn_callback);
1954 if (err)
1955 return err;
1956
1957 err = platform_driver_register(&uvesafb_driver);
1958
1959 if (!err) {
1960 uvesafb_device = platform_device_alloc("uvesafb", 0);
1961 if (uvesafb_device)
1962 err = platform_device_add(uvesafb_device);
1963 else
1964 err = -ENOMEM;
1965
1966 if (err) {
1967 platform_device_put(uvesafb_device);
1968 platform_driver_unregister(&uvesafb_driver);
1969 cn_del_callback(&uvesafb_cn_id);
1970 return err;
1971 }
1972
1973 err = driver_create_file(&uvesafb_driver.driver,
1974 &driver_attr_v86d);
1975 if (err) {
1976 printk(KERN_WARNING "uvesafb: failed to register "
1977 "attributes\n");
1978 err = 0;
1979 }
1980 }
1981 return err;
1982 }
1983
1984 module_init(uvesafb_init);
1985
1986 static void __devexit uvesafb_exit(void)
1987 {
1988 struct uvesafb_ktask *task;
1989
1990 if (v86d_started) {
1991 task = uvesafb_prep();
1992 if (task) {
1993 task->t.flags = TF_EXIT;
1994 uvesafb_exec(task);
1995 uvesafb_free(task);
1996 }
1997 }
1998
1999 cn_del_callback(&uvesafb_cn_id);
2000 driver_remove_file(&uvesafb_driver.driver, &driver_attr_v86d);
2001 platform_device_unregister(uvesafb_device);
2002 platform_driver_unregister(&uvesafb_driver);
2003 }
2004
2005 module_exit(uvesafb_exit);
2006
2007 static int param_get_scroll(char *buffer, struct kernel_param *kp)
2008 {
2009 return 0;
2010 }
2011
2012 static int param_set_scroll(const char *val, struct kernel_param *kp)
2013 {
2014 ypan = 0;
2015
2016 if (!strcmp(val, "redraw"))
2017 ypan = 0;
2018 else if (!strcmp(val, "ypan"))
2019 ypan = 1;
2020 else if (!strcmp(val, "ywrap"))
2021 ypan = 2;
2022
2023 return 0;
2024 }
2025
2026 #define param_check_scroll(name, p) __param_check(name, p, void)
2027
2028 module_param_named(scroll, ypan, scroll, 0);
2029 MODULE_PARM_DESC(scroll,
2030 "Scrolling mode, set to 'redraw', 'ypan', or 'ywrap'");
2031 module_param_named(vgapal, pmi_setpal, invbool, 0);
2032 MODULE_PARM_DESC(vgapal, "Set palette using VGA registers");
2033 module_param_named(pmipal, pmi_setpal, bool, 0);
2034 MODULE_PARM_DESC(pmipal, "Set palette using PMI calls");
2035 module_param(mtrr, uint, 0);
2036 MODULE_PARM_DESC(mtrr,
2037 "Memory Type Range Registers setting. Use 0 to disable.");
2038 module_param(blank, bool, 0);
2039 MODULE_PARM_DESC(blank, "Enable hardware blanking");
2040 module_param(nocrtc, bool, 0);
2041 MODULE_PARM_DESC(nocrtc, "Ignore CRTC timings when setting modes");
2042 module_param(noedid, bool, 0);
2043 MODULE_PARM_DESC(noedid,
2044 "Ignore EDID-provided monitor limits when setting modes");
2045 module_param(vram_remap, uint, 0);
2046 MODULE_PARM_DESC(vram_remap, "Set amount of video memory to be used [MiB]");
2047 module_param(vram_total, uint, 0);
2048 MODULE_PARM_DESC(vram_total, "Set total amount of video memoery [MiB]");
2049 module_param(maxclk, ushort, 0);
2050 MODULE_PARM_DESC(maxclk, "Maximum pixelclock [MHz], overrides EDID data");
2051 module_param(maxhf, ushort, 0);
2052 MODULE_PARM_DESC(maxhf,
2053 "Maximum horizontal frequency [kHz], overrides EDID data");
2054 module_param(maxvf, ushort, 0);
2055 MODULE_PARM_DESC(maxvf,
2056 "Maximum vertical frequency [Hz], overrides EDID data");
2057 module_param_named(mode, mode_option, charp, 0);
2058 MODULE_PARM_DESC(mode,
2059 "Specify initial video mode as \"<xres>x<yres>[-<bpp>][@<refresh>]\"");
2060 module_param(vbemode, ushort, 0);
2061 MODULE_PARM_DESC(vbemode,
2062 "VBE mode number to set, overrides the 'mode' option");
2063 module_param_string(v86d, v86d_path, PATH_MAX, 0660);
2064 MODULE_PARM_DESC(v86d, "Path to the v86d userspace helper.");
2065
2066 MODULE_LICENSE("GPL");
2067 MODULE_AUTHOR("Michal Januszewski <spock@gentoo.org>");
2068 MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards");
2069
Support for the Chinese Samsung S3C2440 based development boards