?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
x86, dumpstack: let signr=0 signal no do_exit
[linux-2.6/mini2440.git] / drivers / video / uvesafb.c
blob6c2d37fdd3b91c12beed0bc5de1aaed89f066454
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_WARNING "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 mode++;
523 par->vbe_modes_cnt--;
524 continue;
525 }
526
527 mib = task->buf;
528 mib->mode_id = *mode;
529
530 /*
531 * We only want modes that are supported with the current
532 * hardware configuration, color, graphics and that have
533 * support for the LFB.
534 */
535 if ((mib->mode_attr & VBE_MODE_MASK) == VBE_MODE_MASK &&
536 mib->bits_per_pixel >= 8)
537 off++;
538 else
539 par->vbe_modes_cnt--;
540
541 mode++;
542 mib->depth = mib->red_len + mib->green_len + mib->blue_len;
543
544 /*
545 * Handle 8bpp modes and modes with broken color component
546 * lengths.
547 */
548 if (mib->depth == 0 || (mib->depth == 24 &&
549 mib->bits_per_pixel == 32))
550 mib->depth = mib->bits_per_pixel;
551 }
552
553 if (par->vbe_modes_cnt > 0)
554 return 0;
555 else
556 return -EINVAL;
557 }
558
559 /*
560 * The Protected Mode Interface is 32-bit x86 code, so we only run it on
561 * x86 and not x86_64.
562 */
563 #ifdef CONFIG_X86_32
564 static int __devinit uvesafb_vbe_getpmi(struct uvesafb_ktask *task,
565 struct uvesafb_par *par)
566 {
567 int i, err;
568
569 uvesafb_reset(task);
570 task->t.regs.eax = 0x4f0a;
571 task->t.regs.ebx = 0x0;
572 err = uvesafb_exec(task);
573
574 if ((task->t.regs.eax & 0xffff) != 0x4f || task->t.regs.es < 0xc000) {
575 par->pmi_setpal = par->ypan = 0;
576 } else {
577 par->pmi_base = (u16 *)phys_to_virt(((u32)task->t.regs.es << 4)
578 + task->t.regs.edi);
579 par->pmi_start = (u8 *)par->pmi_base + par->pmi_base[1];
580 par->pmi_pal = (u8 *)par->pmi_base + par->pmi_base[2];
581 printk(KERN_INFO "uvesafb: protected mode interface info at "
582 "%04x:%04x\n",
583 (u16)task->t.regs.es, (u16)task->t.regs.edi);
584 printk(KERN_INFO "uvesafb: pmi: set display start = %p, "
585 "set palette = %p\n", par->pmi_start,
586 par->pmi_pal);
587
588 if (par->pmi_base[3]) {
589 printk(KERN_INFO "uvesafb: pmi: ports = ");
590 for (i = par->pmi_base[3]/2;
591 par->pmi_base[i] != 0xffff; i++)
592 printk("%x ", par->pmi_base[i]);
593 printk("\n");
594
595 if (par->pmi_base[i] != 0xffff) {
596 printk(KERN_INFO "uvesafb: can't handle memory"
597 " requests, pmi disabled\n");
598 par->ypan = par->pmi_setpal = 0;
599 }
600 }
601 }
602 return 0;
603 }
604 #endif /* CONFIG_X86_32 */
605
606 /*
607 * Check whether a video mode is supported by the Video BIOS and is
608 * compatible with the monitor limits.
609 */
610 static int __devinit uvesafb_is_valid_mode(struct fb_videomode *mode,
611 struct fb_info *info)
612 {
613 if (info->monspecs.gtf) {
614 fb_videomode_to_var(&info->var, mode);
615 if (fb_validate_mode(&info->var, info))
616 return 0;
617 }
618
619 if (uvesafb_vbe_find_mode(info->par, mode->xres, mode->yres, 8,
620 UVESAFB_EXACT_RES) == -1)
621 return 0;
622
623 return 1;
624 }
625
626 static int __devinit uvesafb_vbe_getedid(struct uvesafb_ktask *task,
627 struct fb_info *info)
628 {
629 struct uvesafb_par *par = info->par;
630 int err = 0;
631
632 if (noedid || par->vbe_ib.vbe_version < 0x0300)
633 return -EINVAL;
634
635 task->t.regs.eax = 0x4f15;
636 task->t.regs.ebx = 0;
637 task->t.regs.ecx = 0;
638 task->t.buf_len = 0;
639 task->t.flags = 0;
640
641 err = uvesafb_exec(task);
642
643 if ((task->t.regs.eax & 0xffff) != 0x004f || err)
644 return -EINVAL;
645
646 if ((task->t.regs.ebx & 0x3) == 3) {
647 printk(KERN_INFO "uvesafb: VBIOS/hardware supports both "
648 "DDC1 and DDC2 transfers\n");
649 } else if ((task->t.regs.ebx & 0x3) == 2) {
650 printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC2 "
651 "transfers\n");
652 } else if ((task->t.regs.ebx & 0x3) == 1) {
653 printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC1 "
654 "transfers\n");
655 } else {
656 printk(KERN_INFO "uvesafb: VBIOS/hardware doesn't support "
657 "DDC transfers\n");
658 return -EINVAL;
659 }
660
661 task->t.regs.eax = 0x4f15;
662 task->t.regs.ebx = 1;
663 task->t.regs.ecx = task->t.regs.edx = 0;
664 task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
665 task->t.buf_len = EDID_LENGTH;
666 task->buf = kzalloc(EDID_LENGTH, GFP_KERNEL);
667
668 err = uvesafb_exec(task);
669
670 if ((task->t.regs.eax & 0xffff) == 0x004f && !err) {
671 fb_edid_to_monspecs(task->buf, &info->monspecs);
672
673 if (info->monspecs.vfmax && info->monspecs.hfmax) {
674 /*
675 * If the maximum pixel clock wasn't specified in
676 * the EDID block, set it to 300 MHz.
677 */
678 if (info->monspecs.dclkmax == 0)
679 info->monspecs.dclkmax = 300 * 1000000;
680 info->monspecs.gtf = 1;
681 }
682 } else {
683 err = -EINVAL;
684 }
685
686 kfree(task->buf);
687 return err;
688 }
689
690 static void __devinit uvesafb_vbe_getmonspecs(struct uvesafb_ktask *task,
691 struct fb_info *info)
692 {
693 struct uvesafb_par *par = info->par;
694 int i;
695
696 memset(&info->monspecs, 0, sizeof(info->monspecs));
697
698 /*
699 * If we don't get all necessary data from the EDID block,
700 * mark it as incompatible with the GTF and set nocrtc so
701 * that we always use the default BIOS refresh rate.
702 */
703 if (uvesafb_vbe_getedid(task, info)) {
704 info->monspecs.gtf = 0;
705 par->nocrtc = 1;
706 }
707
708 /* Kernel command line overrides. */
709 if (maxclk)
710 info->monspecs.dclkmax = maxclk * 1000000;
711 if (maxvf)
712 info->monspecs.vfmax = maxvf;
713 if (maxhf)
714 info->monspecs.hfmax = maxhf * 1000;
715
716 /*
717 * In case DDC transfers are not supported, the user can provide
718 * monitor limits manually. Lower limits are set to "safe" values.
719 */
720 if (info->monspecs.gtf == 0 && maxclk && maxvf && maxhf) {
721 info->monspecs.dclkmin = 0;
722 info->monspecs.vfmin = 60;
723 info->monspecs.hfmin = 29000;
724 info->monspecs.gtf = 1;
725 par->nocrtc = 0;
726 }
727
728 if (info->monspecs.gtf)
729 printk(KERN_INFO
730 "uvesafb: monitor limits: vf = %d Hz, hf = %d kHz, "
731 "clk = %d MHz\n", info->monspecs.vfmax,
732 (int)(info->monspecs.hfmax / 1000),
733 (int)(info->monspecs.dclkmax / 1000000));
734 else
735 printk(KERN_INFO "uvesafb: no monitor limits have been set, "
736 "default refresh rate will be used\n");
737
738 /* Add VBE modes to the modelist. */
739 for (i = 0; i < par->vbe_modes_cnt; i++) {
740 struct fb_var_screeninfo var;
741 struct vbe_mode_ib *mode;
742 struct fb_videomode vmode;
743
744 mode = &par->vbe_modes[i];
745 memset(&var, 0, sizeof(var));
746
747 var.xres = mode->x_res;
748 var.yres = mode->y_res;
749
750 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, &var, info);
751 fb_var_to_videomode(&vmode, &var);
752 fb_add_videomode(&vmode, &info->modelist);
753 }
754
755 /* Add valid VESA modes to our modelist. */
756 for (i = 0; i < VESA_MODEDB_SIZE; i++) {
757 if (uvesafb_is_valid_mode((struct fb_videomode *)
758 &vesa_modes[i], info))
759 fb_add_videomode(&vesa_modes[i], &info->modelist);
760 }
761
762 for (i = 0; i < info->monspecs.modedb_len; i++) {
763 if (uvesafb_is_valid_mode(&info->monspecs.modedb[i], info))
764 fb_add_videomode(&info->monspecs.modedb[i],
765 &info->modelist);
766 }
767
768 return;
769 }
770
771 static void __devinit uvesafb_vbe_getstatesize(struct uvesafb_ktask *task,
772 struct uvesafb_par *par)
773 {
774 int err;
775
776 uvesafb_reset(task);
777
778 /*
779 * Get the VBE state buffer size. We want all available
780 * hardware state data (CL = 0x0f).
781 */
782 task->t.regs.eax = 0x4f04;
783 task->t.regs.ecx = 0x000f;
784 task->t.regs.edx = 0x0000;
785 task->t.flags = 0;
786
787 err = uvesafb_exec(task);
788
789 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
790 printk(KERN_WARNING "uvesafb: VBE state buffer size "
791 "cannot be determined (eax=0x%x, err=%d)\n",
792 task->t.regs.eax, err);
793 par->vbe_state_size = 0;
794 return;
795 }
796
797 par->vbe_state_size = 64 * (task->t.regs.ebx & 0xffff);
798 }
799
800 static int __devinit uvesafb_vbe_init(struct fb_info *info)
801 {
802 struct uvesafb_ktask *task = NULL;
803 struct uvesafb_par *par = info->par;
804 int err;
805
806 task = uvesafb_prep();
807 if (!task)
808 return -ENOMEM;
809
810 err = uvesafb_vbe_getinfo(task, par);
811 if (err)
812 goto out;
813
814 err = uvesafb_vbe_getmodes(task, par);
815 if (err)
816 goto out;
817
818 par->nocrtc = nocrtc;
819 #ifdef CONFIG_X86_32
820 par->pmi_setpal = pmi_setpal;
821 par->ypan = ypan;
822
823 if (par->pmi_setpal || par->ypan)
824 uvesafb_vbe_getpmi(task, par);
825 #else
826 /* The protected mode interface is not available on non-x86. */
827 par->pmi_setpal = par->ypan = 0;
828 #endif
829
830 INIT_LIST_HEAD(&info->modelist);
831 uvesafb_vbe_getmonspecs(task, info);
832 uvesafb_vbe_getstatesize(task, par);
833
834 out: uvesafb_free(task);
835 return err;
836 }
837
838 static int __devinit uvesafb_vbe_init_mode(struct fb_info *info)
839 {
840 struct list_head *pos;
841 struct fb_modelist *modelist;
842 struct fb_videomode *mode;
843 struct uvesafb_par *par = info->par;
844 int i, modeid;
845
846 /* Has the user requested a specific VESA mode? */
847 if (vbemode) {
848 for (i = 0; i < par->vbe_modes_cnt; i++) {
849 if (par->vbe_modes[i].mode_id == vbemode) {
850 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
851 &info->var, info);
852 /*
853 * With pixclock set to 0, the default BIOS
854 * timings will be used in set_par().
855 */
856 info->var.pixclock = 0;
857 modeid = i;
858 goto gotmode;
859 }
860 }
861 printk(KERN_INFO "uvesafb: requested VBE mode 0x%x is "
862 "unavailable\n", vbemode);
863 vbemode = 0;
864 }
865
866 /* Count the modes in the modelist */
867 i = 0;
868 list_for_each(pos, &info->modelist)
869 i++;
870
871 /*
872 * Convert the modelist into a modedb so that we can use it with
873 * fb_find_mode().
874 */
875 mode = kzalloc(i * sizeof(*mode), GFP_KERNEL);
876 if (mode) {
877 i = 0;
878 list_for_each(pos, &info->modelist) {
879 modelist = list_entry(pos, struct fb_modelist, list);
880 mode[i] = modelist->mode;
881 i++;
882 }
883
884 if (!mode_option)
885 mode_option = UVESAFB_DEFAULT_MODE;
886
887 i = fb_find_mode(&info->var, info, mode_option, mode, i,
888 NULL, 8);
889
890 kfree(mode);
891 }
892
893 /* fb_find_mode() failed */
894 if (i == 0) {
895 info->var.xres = 640;
896 info->var.yres = 480;
897 mode = (struct fb_videomode *)
898 fb_find_best_mode(&info->var, &info->modelist);
899
900 if (mode) {
901 fb_videomode_to_var(&info->var, mode);
902 } else {
903 modeid = par->vbe_modes[0].mode_id;
904 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
905 &info->var, info);
906 goto gotmode;
907 }
908 }
909
910 /* Look for a matching VBE mode. */
911 modeid = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres,
912 info->var.bits_per_pixel, UVESAFB_EXACT_RES);
913
914 if (modeid == -1)
915 return -EINVAL;
916
917 gotmode:
918 uvesafb_setup_var(&info->var, info, &par->vbe_modes[modeid]);
919
920 /*
921 * If we are not VBE3.0+ compliant, we're done -- the BIOS will
922 * ignore our timings anyway.
923 */
924 if (par->vbe_ib.vbe_version < 0x0300 || par->nocrtc)
925 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
926 &info->var, info);
927
928 return modeid;
929 }
930
931 static int uvesafb_setpalette(struct uvesafb_pal_entry *entries, int count,
932 int start, struct fb_info *info)
933 {
934 struct uvesafb_ktask *task;
935 #ifdef CONFIG_X86
936 struct uvesafb_par *par = info->par;
937 int i = par->mode_idx;
938 #endif
939 int err = 0;
940
941 /*
942 * We support palette modifications for 8 bpp modes only, so
943 * there can never be more than 256 entries.
944 */
945 if (start + count > 256)
946 return -EINVAL;
947
948 #ifdef CONFIG_X86
949 /* Use VGA registers if mode is VGA-compatible. */
950 if (i >= 0 && i < par->vbe_modes_cnt &&
951 par->vbe_modes[i].mode_attr & VBE_MODE_VGACOMPAT) {
952 for (i = 0; i < count; i++) {
953 outb_p(start + i, dac_reg);
954 outb_p(entries[i].red, dac_val);
955 outb_p(entries[i].green, dac_val);
956 outb_p(entries[i].blue, dac_val);
957 }
958 }
959 #ifdef CONFIG_X86_32
960 else if (par->pmi_setpal) {
961 __asm__ __volatile__(
962 "call *(%%esi)"
963 : /* no return value */
964 : "a" (0x4f09), /* EAX */
965 "b" (0), /* EBX */
966 "c" (count), /* ECX */
967 "d" (start), /* EDX */
968 "D" (entries), /* EDI */
969 "S" (&par->pmi_pal)); /* ESI */
970 }
971 #endif /* CONFIG_X86_32 */
972 else
973 #endif /* CONFIG_X86 */
974 {
975 task = uvesafb_prep();
976 if (!task)
977 return -ENOMEM;
978
979 task->t.regs.eax = 0x4f09;
980 task->t.regs.ebx = 0x0;
981 task->t.regs.ecx = count;
982 task->t.regs.edx = start;
983 task->t.flags = TF_BUF_ESDI;
984 task->t.buf_len = sizeof(struct uvesafb_pal_entry) * count;
985 task->buf = entries;
986
987 err = uvesafb_exec(task);
988 if ((task->t.regs.eax & 0xffff) != 0x004f)
989 err = 1;
990
991 uvesafb_free(task);
992 }
993 return err;
994 }
995
996 static int uvesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
997 unsigned blue, unsigned transp,
998 struct fb_info *info)
999 {
1000 struct uvesafb_pal_entry entry;
1001 int shift = 16 - info->var.green.length;
1002 int err = 0;
1003
1004 if (regno >= info->cmap.len)
1005 return -EINVAL;
1006
1007 if (info->var.bits_per_pixel == 8) {
1008 entry.red = red >> shift;
1009 entry.green = green >> shift;
1010 entry.blue = blue >> shift;
1011 entry.pad = 0;
1012
1013 err = uvesafb_setpalette(&entry, 1, regno, info);
1014 } else if (regno < 16) {
1015 switch (info->var.bits_per_pixel) {
1016 case 16:
1017 if (info->var.red.offset == 10) {
1018 /* 1:5:5:5 */
1019 ((u32 *) (info->pseudo_palette))[regno] =
1020 ((red & 0xf800) >> 1) |
1021 ((green & 0xf800) >> 6) |
1022 ((blue & 0xf800) >> 11);
1023 } else {
1024 /* 0:5:6:5 */
1025 ((u32 *) (info->pseudo_palette))[regno] =
1026 ((red & 0xf800) ) |
1027 ((green & 0xfc00) >> 5) |
1028 ((blue & 0xf800) >> 11);
1029 }
1030 break;
1031
1032 case 24:
1033 case 32:
1034 red >>= 8;
1035 green >>= 8;
1036 blue >>= 8;
1037 ((u32 *)(info->pseudo_palette))[regno] =
1038 (red << info->var.red.offset) |
1039 (green << info->var.green.offset) |
1040 (blue << info->var.blue.offset);
1041 break;
1042 }
1043 }
1044 return err;
1045 }
1046
1047 static int uvesafb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
1048 {
1049 struct uvesafb_pal_entry *entries;
1050 int shift = 16 - info->var.green.length;
1051 int i, err = 0;
1052
1053 if (info->var.bits_per_pixel == 8) {
1054 if (cmap->start + cmap->len > info->cmap.start +
1055 info->cmap.len || cmap->start < info->cmap.start)
1056 return -EINVAL;
1057
1058 entries = kmalloc(sizeof(*entries) * cmap->len, GFP_KERNEL);
1059 if (!entries)
1060 return -ENOMEM;
1061
1062 for (i = 0; i < cmap->len; i++) {
1063 entries[i].red = cmap->red[i] >> shift;
1064 entries[i].green = cmap->green[i] >> shift;
1065 entries[i].blue = cmap->blue[i] >> shift;
1066 entries[i].pad = 0;
1067 }
1068 err = uvesafb_setpalette(entries, cmap->len, cmap->start, info);
1069 kfree(entries);
1070 } else {
1071 /*
1072 * For modes with bpp > 8, we only set the pseudo palette in
1073 * the fb_info struct. We rely on uvesafb_setcolreg to do all
1074 * sanity checking.
1075 */
1076 for (i = 0; i < cmap->len; i++) {
1077 err |= uvesafb_setcolreg(cmap->start + i, cmap->red[i],
1078 cmap->green[i], cmap->blue[i],
1079 0, info);
1080 }
1081 }
1082 return err;
1083 }
1084
1085 static int uvesafb_pan_display(struct fb_var_screeninfo *var,
1086 struct fb_info *info)
1087 {
1088 #ifdef CONFIG_X86_32
1089 int offset;
1090 struct uvesafb_par *par = info->par;
1091
1092 offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;
1093
1094 /*
1095 * It turns out it's not the best idea to do panning via vm86,
1096 * so we only allow it if we have a PMI.
1097 */
1098 if (par->pmi_start) {
1099 __asm__ __volatile__(
1100 "call *(%%edi)"
1101 : /* no return value */
1102 : "a" (0x4f07), /* EAX */
1103 "b" (0), /* EBX */
1104 "c" (offset), /* ECX */
1105 "d" (offset >> 16), /* EDX */
1106 "D" (&par->pmi_start)); /* EDI */
1107 }
1108 #endif
1109 return 0;
1110 }
1111
1112 static int uvesafb_blank(int blank, struct fb_info *info)
1113 {
1114 struct uvesafb_ktask *task;
1115 int err = 1;
1116 #ifdef CONFIG_X86
1117 struct uvesafb_par *par = info->par;
1118
1119 if (par->vbe_ib.capabilities & VBE_CAP_VGACOMPAT) {
1120 int loop = 10000;
1121 u8 seq = 0, crtc17 = 0;
1122
1123 if (blank == FB_BLANK_POWERDOWN) {
1124 seq = 0x20;
1125 crtc17 = 0x00;
1126 err = 0;
1127 } else {
1128 seq = 0x00;
1129 crtc17 = 0x80;
1130 err = (blank == FB_BLANK_UNBLANK) ? 0 : -EINVAL;
1131 }
1132
1133 vga_wseq(NULL, 0x00, 0x01);
1134 seq |= vga_rseq(NULL, 0x01) & ~0x20;
1135 vga_wseq(NULL, 0x00, seq);
1136
1137 crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80;
1138 while (loop--);
1139 vga_wcrt(NULL, 0x17, crtc17);
1140 vga_wseq(NULL, 0x00, 0x03);
1141 } else
1142 #endif /* CONFIG_X86 */
1143 {
1144 task = uvesafb_prep();
1145 if (!task)
1146 return -ENOMEM;
1147
1148 task->t.regs.eax = 0x4f10;
1149 switch (blank) {
1150 case FB_BLANK_UNBLANK:
1151 task->t.regs.ebx = 0x0001;
1152 break;
1153 case FB_BLANK_NORMAL:
1154 task->t.regs.ebx = 0x0101; /* standby */
1155 break;
1156 case FB_BLANK_POWERDOWN:
1157 task->t.regs.ebx = 0x0401; /* powerdown */
1158 break;
1159 default:
1160 goto out;
1161 }
1162
1163 err = uvesafb_exec(task);
1164 if (err || (task->t.regs.eax & 0xffff) != 0x004f)
1165 err = 1;
1166 out: uvesafb_free(task);
1167 }
1168 return err;
1169 }
1170
1171 static int uvesafb_open(struct fb_info *info, int user)
1172 {
1173 struct uvesafb_par *par = info->par;
1174 int cnt = atomic_read(&par->ref_count);
1175
1176 if (!cnt && par->vbe_state_size)
1177 par->vbe_state_orig = uvesafb_vbe_state_save(par);
1178
1179 atomic_inc(&par->ref_count);
1180 return 0;
1181 }
1182
1183 static int uvesafb_release(struct fb_info *info, int user)
1184 {
1185 struct uvesafb_ktask *task = NULL;
1186 struct uvesafb_par *par = info->par;
1187 int cnt = atomic_read(&par->ref_count);
1188
1189 if (!cnt)
1190 return -EINVAL;
1191
1192 if (cnt != 1)
1193 goto out;
1194
1195 task = uvesafb_prep();
1196 if (!task)
1197 goto out;
1198
1199 /* First, try to set the standard 80x25 text mode. */
1200 task->t.regs.eax = 0x0003;
1201 uvesafb_exec(task);
1202
1203 /*
1204 * Now try to restore whatever hardware state we might have
1205 * saved when the fb device was first opened.
1206 */
1207 uvesafb_vbe_state_restore(par, par->vbe_state_orig);
1208 out:
1209 atomic_dec(&par->ref_count);
1210 if (task)
1211 uvesafb_free(task);
1212 return 0;
1213 }
1214
1215 static int uvesafb_set_par(struct fb_info *info)
1216 {
1217 struct uvesafb_par *par = info->par;
1218 struct uvesafb_ktask *task = NULL;
1219 struct vbe_crtc_ib *crtc = NULL;
1220 struct vbe_mode_ib *mode = NULL;
1221 int i, err = 0, depth = info->var.bits_per_pixel;
1222
1223 if (depth > 8 && depth != 32)
1224 depth = info->var.red.length + info->var.green.length +
1225 info->var.blue.length;
1226
1227 i = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, depth,
1228 UVESAFB_EXACT_RES | UVESAFB_EXACT_DEPTH);
1229 if (i >= 0)
1230 mode = &par->vbe_modes[i];
1231 else
1232 return -EINVAL;
1233
1234 task = uvesafb_prep();
1235 if (!task)
1236 return -ENOMEM;
1237 setmode:
1238 task->t.regs.eax = 0x4f02;
1239 task->t.regs.ebx = mode->mode_id | 0x4000; /* use LFB */
1240
1241 if (par->vbe_ib.vbe_version >= 0x0300 && !par->nocrtc &&
1242 info->var.pixclock != 0) {
1243 task->t.regs.ebx |= 0x0800; /* use CRTC data */
1244 task->t.flags = TF_BUF_ESDI;
1245 crtc = kzalloc(sizeof(struct vbe_crtc_ib), GFP_KERNEL);
1246 if (!crtc) {
1247 err = -ENOMEM;
1248 goto out;
1249 }
1250 crtc->horiz_start = info->var.xres + info->var.right_margin;
1251 crtc->horiz_end = crtc->horiz_start + info->var.hsync_len;
1252 crtc->horiz_total = crtc->horiz_end + info->var.left_margin;
1253
1254 crtc->vert_start = info->var.yres + info->var.lower_margin;
1255 crtc->vert_end = crtc->vert_start + info->var.vsync_len;
1256 crtc->vert_total = crtc->vert_end + info->var.upper_margin;
1257
1258 crtc->pixel_clock = PICOS2KHZ(info->var.pixclock) * 1000;
1259 crtc->refresh_rate = (u16)(100 * (crtc->pixel_clock /
1260 (crtc->vert_total * crtc->horiz_total)));
1261
1262 if (info->var.vmode & FB_VMODE_DOUBLE)
1263 crtc->flags |= 0x1;
1264 if (info->var.vmode & FB_VMODE_INTERLACED)
1265 crtc->flags |= 0x2;
1266 if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
1267 crtc->flags |= 0x4;
1268 if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
1269 crtc->flags |= 0x8;
1270 memcpy(&par->crtc, crtc, sizeof(*crtc));
1271 } else {
1272 memset(&par->crtc, 0, sizeof(*crtc));
1273 }
1274
1275 task->t.buf_len = sizeof(struct vbe_crtc_ib);
1276 task->buf = &par->crtc;
1277
1278 err = uvesafb_exec(task);
1279 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
1280 /*
1281 * The mode switch might have failed because we tried to
1282 * use our own timings. Try again with the default timings.
1283 */
1284 if (crtc != NULL) {
1285 printk(KERN_WARNING "uvesafb: mode switch failed "
1286 "(eax=0x%x, err=%d). Trying again with "
1287 "default timings.\n", task->t.regs.eax, err);
1288 uvesafb_reset(task);
1289 kfree(crtc);
1290 crtc = NULL;
1291 info->var.pixclock = 0;
1292 goto setmode;
1293 } else {
1294 printk(KERN_ERR "uvesafb: mode switch failed (eax="
1295 "0x%x, err=%d)\n", task->t.regs.eax, err);
1296 err = -EINVAL;
1297 goto out;
1298 }
1299 }
1300 par->mode_idx = i;
1301
1302 /* For 8bpp modes, always try to set the DAC to 8 bits. */
1303 if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC &&
1304 mode->bits_per_pixel <= 8) {
1305 uvesafb_reset(task);
1306 task->t.regs.eax = 0x4f08;
1307 task->t.regs.ebx = 0x0800;
1308
1309 err = uvesafb_exec(task);
1310 if (err || (task->t.regs.eax & 0xffff) != 0x004f ||
1311 ((task->t.regs.ebx & 0xff00) >> 8) != 8) {
1312 /*
1313 * We've failed to set the DAC palette format -
1314 * time to correct var.
1315 */
1316 info->var.red.length = 6;
1317 info->var.green.length = 6;
1318 info->var.blue.length = 6;
1319 }
1320 }
1321
1322 info->fix.visual = (info->var.bits_per_pixel == 8) ?
1323 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
1324 info->fix.line_length = mode->bytes_per_scan_line;
1325
1326 out: if (crtc != NULL)
1327 kfree(crtc);
1328 uvesafb_free(task);
1329
1330 return err;
1331 }
1332
1333 static void uvesafb_check_limits(struct fb_var_screeninfo *var,
1334 struct fb_info *info)
1335 {
1336 const struct fb_videomode *mode;
1337 struct uvesafb_par *par = info->par;
1338
1339 /*
1340 * If pixclock is set to 0, then we're using default BIOS timings
1341 * and thus don't have to perform any checks here.
1342 */
1343 if (!var->pixclock)
1344 return;
1345
1346 if (par->vbe_ib.vbe_version < 0x0300) {
1347 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, var, info);
1348 return;
1349 }
1350
1351 if (!fb_validate_mode(var, info))
1352 return;
1353
1354 mode = fb_find_best_mode(var, &info->modelist);
1355 if (mode) {
1356 if (mode->xres == var->xres && mode->yres == var->yres &&
1357 !(mode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))) {
1358 fb_videomode_to_var(var, mode);
1359 return;
1360 }
1361 }
1362
1363 if (info->monspecs.gtf && !fb_get_mode(FB_MAXTIMINGS, 0, var, info))
1364 return;
1365 /* Use default refresh rate */
1366 var->pixclock = 0;
1367 }
1368
1369 static int uvesafb_check_var(struct fb_var_screeninfo *var,
1370 struct fb_info *info)
1371 {
1372 struct uvesafb_par *par = info->par;
1373 struct vbe_mode_ib *mode = NULL;
1374 int match = -1;
1375 int depth = var->red.length + var->green.length + var->blue.length;
1376
1377 /*
1378 * Various apps will use bits_per_pixel to set the color depth,
1379 * which is theoretically incorrect, but which we'll try to handle
1380 * here.
1381 */
1382 if (depth == 0 || abs(depth - var->bits_per_pixel) >= 8)
1383 depth = var->bits_per_pixel;
1384
1385 match = uvesafb_vbe_find_mode(par, var->xres, var->yres, depth,
1386 UVESAFB_EXACT_RES);
1387 if (match == -1)
1388 return -EINVAL;
1389
1390 mode = &par->vbe_modes[match];
1391 uvesafb_setup_var(var, info, mode);
1392
1393 /*
1394 * Check whether we have remapped enough memory for this mode.
1395 * We might be called at an early stage, when we haven't remapped
1396 * any memory yet, in which case we simply skip the check.
1397 */
1398 if (var->yres * mode->bytes_per_scan_line > info->fix.smem_len
1399 && info->fix.smem_len)
1400 return -EINVAL;
1401
1402 if ((var->vmode & FB_VMODE_DOUBLE) &&
1403 !(par->vbe_modes[match].mode_attr & 0x100))
1404 var->vmode &= ~FB_VMODE_DOUBLE;
1405
1406 if ((var->vmode & FB_VMODE_INTERLACED) &&
1407 !(par->vbe_modes[match].mode_attr & 0x200))
1408 var->vmode &= ~FB_VMODE_INTERLACED;
1409
1410 uvesafb_check_limits(var, info);
1411
1412 var->xres_virtual = var->xres;
1413 var->yres_virtual = (par->ypan) ?
1414 info->fix.smem_len / mode->bytes_per_scan_line :
1415 var->yres;
1416 return 0;
1417 }
1418
1419 static void uvesafb_save_state(struct fb_info *info)
1420 {
1421 struct uvesafb_par *par = info->par;
1422
1423 if (par->vbe_state_saved)
1424 kfree(par->vbe_state_saved);
1425
1426 par->vbe_state_saved = uvesafb_vbe_state_save(par);
1427 }
1428
1429 static void uvesafb_restore_state(struct fb_info *info)
1430 {
1431 struct uvesafb_par *par = info->par;
1432
1433 uvesafb_vbe_state_restore(par, par->vbe_state_saved);
1434 }
1435
1436 static struct fb_ops uvesafb_ops = {
1437 .owner = THIS_MODULE,
1438 .fb_open = uvesafb_open,
1439 .fb_release = uvesafb_release,
1440 .fb_setcolreg = uvesafb_setcolreg,
1441 .fb_setcmap = uvesafb_setcmap,
1442 .fb_pan_display = uvesafb_pan_display,
1443 .fb_blank = uvesafb_blank,
1444 .fb_fillrect = cfb_fillrect,
1445 .fb_copyarea = cfb_copyarea,
1446 .fb_imageblit = cfb_imageblit,
1447 .fb_check_var = uvesafb_check_var,
1448 .fb_set_par = uvesafb_set_par,
1449 .fb_save_state = uvesafb_save_state,
1450 .fb_restore_state = uvesafb_restore_state,
1451 };
1452
1453 static void __devinit uvesafb_init_info(struct fb_info *info,
1454 struct vbe_mode_ib *mode)
1455 {
1456 unsigned int size_vmode;
1457 unsigned int size_remap;
1458 unsigned int size_total;
1459 struct uvesafb_par *par = info->par;
1460 int i, h;
1461
1462 info->pseudo_palette = ((u8 *)info->par + sizeof(struct uvesafb_par));
1463 info->fix = uvesafb_fix;
1464 info->fix.ypanstep = par->ypan ? 1 : 0;
1465 info->fix.ywrapstep = (par->ypan > 1) ? 1 : 0;
1466
1467 /*
1468 * If we were unable to get the state buffer size, disable
1469 * functions for saving and restoring the hardware state.
1470 */
1471 if (par->vbe_state_size == 0) {
1472 info->fbops->fb_save_state = NULL;
1473 info->fbops->fb_restore_state = NULL;
1474 }
1475
1476 /* Disable blanking if the user requested so. */
1477 if (!blank)
1478 info->fbops->fb_blank = NULL;
1479
1480 /*
1481 * Find out how much IO memory is required for the mode with
1482 * the highest resolution.
1483 */
1484 size_remap = 0;
1485 for (i = 0; i < par->vbe_modes_cnt; i++) {
1486 h = par->vbe_modes[i].bytes_per_scan_line *
1487 par->vbe_modes[i].y_res;
1488 if (h > size_remap)
1489 size_remap = h;
1490 }
1491 size_remap *= 2;
1492
1493 /*
1494 * size_vmode -- that is the amount of memory needed for the
1495 * used video mode, i.e. the minimum amount of
1496 * memory we need.
1497 */
1498 if (mode != NULL) {
1499 size_vmode = info->var.yres * mode->bytes_per_scan_line;
1500 } else {
1501 size_vmode = info->var.yres * info->var.xres *
1502 ((info->var.bits_per_pixel + 7) >> 3);
1503 }
1504
1505 /*
1506 * size_total -- all video memory we have. Used for mtrr
1507 * entries, resource allocation and bounds
1508 * checking.
1509 */
1510 size_total = par->vbe_ib.total_memory * 65536;
1511 if (vram_total)
1512 size_total = vram_total * 1024 * 1024;
1513 if (size_total < size_vmode)
1514 size_total = size_vmode;
1515
1516 /*
1517 * size_remap -- the amount of video memory we are going to
1518 * use for vesafb. With modern cards it is no
1519 * option to simply use size_total as th
1520 * wastes plenty of kernel address space.
1521 */
1522 if (vram_remap)
1523 size_remap = vram_remap * 1024 * 1024;
1524 if (size_remap < size_vmode)
1525 size_remap = size_vmode;
1526 if (size_remap > size_total)
1527 size_remap = size_total;
1528
1529 info->fix.smem_len = size_remap;
1530 info->fix.smem_start = mode->phys_base_ptr;
1531
1532 /*
1533 * We have to set yres_virtual here because when setup_var() was
1534 * called, smem_len wasn't defined yet.
1535 */
1536 info->var.yres_virtual = info->fix.smem_len /
1537 mode->bytes_per_scan_line;
1538
1539 if (par->ypan && info->var.yres_virtual > info->var.yres) {
1540 printk(KERN_INFO "uvesafb: scrolling: %s "
1541 "using protected mode interface, "
1542 "yres_virtual=%d\n",
1543 (par->ypan > 1) ? "ywrap" : "ypan",
1544 info->var.yres_virtual);
1545 } else {
1546 printk(KERN_INFO "uvesafb: scrolling: redraw\n");
1547 info->var.yres_virtual = info->var.yres;
1548 par->ypan = 0;
1549 }
1550
1551 info->flags = FBINFO_FLAG_DEFAULT |
1552 (par->ypan) ? FBINFO_HWACCEL_YPAN : 0;
1553
1554 if (!par->ypan)
1555 info->fbops->fb_pan_display = NULL;
1556 }
1557
1558 static void __devinit uvesafb_init_mtrr(struct fb_info *info)
1559 {
1560 #ifdef CONFIG_MTRR
1561 if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) {
1562 int temp_size = info->fix.smem_len;
1563 unsigned int type = 0;
1564
1565 switch (mtrr) {
1566 case 1:
1567 type = MTRR_TYPE_UNCACHABLE;
1568 break;
1569 case 2:
1570 type = MTRR_TYPE_WRBACK;
1571 break;
1572 case 3:
1573 type = MTRR_TYPE_WRCOMB;
1574 break;
1575 case 4:
1576 type = MTRR_TYPE_WRTHROUGH;
1577 break;
1578 default:
1579 type = 0;
1580 break;
1581 }
1582
1583 if (type) {
1584 int rc;
1585
1586 /* Find the largest power-of-two */
1587 while (temp_size & (temp_size - 1))
1588 temp_size &= (temp_size - 1);
1589
1590 /* Try and find a power of two to add */
1591 do {
1592 rc = mtrr_add(info->fix.smem_start,
1593 temp_size, type, 1);
1594 temp_size >>= 1;
1595 } while (temp_size >= PAGE_SIZE && rc == -EINVAL);
1596 }
1597 }
1598 #endif /* CONFIG_MTRR */
1599 }
1600
1601
1602 static ssize_t uvesafb_show_vbe_ver(struct device *dev,
1603 struct device_attribute *attr, char *buf)
1604 {
1605 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1606 struct uvesafb_par *par = info->par;
1607
1608 return snprintf(buf, PAGE_SIZE, "%.4x\n", par->vbe_ib.vbe_version);
1609 }
1610
1611 static DEVICE_ATTR(vbe_version, S_IRUGO, uvesafb_show_vbe_ver, NULL);
1612
1613 static ssize_t uvesafb_show_vbe_modes(struct device *dev,
1614 struct device_attribute *attr, char *buf)
1615 {
1616 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1617 struct uvesafb_par *par = info->par;
1618 int ret = 0, i;
1619
1620 for (i = 0; i < par->vbe_modes_cnt && ret < PAGE_SIZE; i++) {
1621 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1622 "%dx%d-%d, 0x%.4x\n",
1623 par->vbe_modes[i].x_res, par->vbe_modes[i].y_res,
1624 par->vbe_modes[i].depth, par->vbe_modes[i].mode_id);
1625 }
1626
1627 return ret;
1628 }
1629
1630 static DEVICE_ATTR(vbe_modes, S_IRUGO, uvesafb_show_vbe_modes, NULL);
1631
1632 static ssize_t uvesafb_show_vendor(struct device *dev,
1633 struct device_attribute *attr, char *buf)
1634 {
1635 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1636 struct uvesafb_par *par = info->par;
1637
1638 if (par->vbe_ib.oem_vendor_name_ptr)
1639 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1640 (&par->vbe_ib) + par->vbe_ib.oem_vendor_name_ptr);
1641 else
1642 return 0;
1643 }
1644
1645 static DEVICE_ATTR(oem_vendor, S_IRUGO, uvesafb_show_vendor, NULL);
1646
1647 static ssize_t uvesafb_show_product_name(struct device *dev,
1648 struct device_attribute *attr, char *buf)
1649 {
1650 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1651 struct uvesafb_par *par = info->par;
1652
1653 if (par->vbe_ib.oem_product_name_ptr)
1654 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1655 (&par->vbe_ib) + par->vbe_ib.oem_product_name_ptr);
1656 else
1657 return 0;
1658 }
1659
1660 static DEVICE_ATTR(oem_product_name, S_IRUGO, uvesafb_show_product_name, NULL);
1661
1662 static ssize_t uvesafb_show_product_rev(struct device *dev,
1663 struct device_attribute *attr, char *buf)
1664 {
1665 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1666 struct uvesafb_par *par = info->par;
1667
1668 if (par->vbe_ib.oem_product_rev_ptr)
1669 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1670 (&par->vbe_ib) + par->vbe_ib.oem_product_rev_ptr);
1671 else
1672 return 0;
1673 }
1674
1675 static DEVICE_ATTR(oem_product_rev, S_IRUGO, uvesafb_show_product_rev, NULL);
1676
1677 static ssize_t uvesafb_show_oem_string(struct device *dev,
1678 struct device_attribute *attr, char *buf)
1679 {
1680 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1681 struct uvesafb_par *par = info->par;
1682
1683 if (par->vbe_ib.oem_string_ptr)
1684 return snprintf(buf, PAGE_SIZE, "%s\n",
1685 (char *)(&par->vbe_ib) + par->vbe_ib.oem_string_ptr);
1686 else
1687 return 0;
1688 }
1689
1690 static DEVICE_ATTR(oem_string, S_IRUGO, uvesafb_show_oem_string, NULL);
1691
1692 static ssize_t uvesafb_show_nocrtc(struct device *dev,
1693 struct device_attribute *attr, char *buf)
1694 {
1695 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1696 struct uvesafb_par *par = info->par;
1697
1698 return snprintf(buf, PAGE_SIZE, "%d\n", par->nocrtc);
1699 }
1700
1701 static ssize_t uvesafb_store_nocrtc(struct device *dev,
1702 struct device_attribute *attr, const char *buf, size_t count)
1703 {
1704 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1705 struct uvesafb_par *par = info->par;
1706
1707 if (count > 0) {
1708 if (buf[0] == '0')
1709 par->nocrtc = 0;
1710 else
1711 par->nocrtc = 1;
1712 }
1713 return count;
1714 }
1715
1716 static DEVICE_ATTR(nocrtc, S_IRUGO | S_IWUSR, uvesafb_show_nocrtc,
1717 uvesafb_store_nocrtc);
1718
1719 static struct attribute *uvesafb_dev_attrs[] = {
1720 &dev_attr_vbe_version.attr,
1721 &dev_attr_vbe_modes.attr,
1722 &dev_attr_oem_vendor.attr,
1723 &dev_attr_oem_product_name.attr,
1724 &dev_attr_oem_product_rev.attr,
1725 &dev_attr_oem_string.attr,
1726 &dev_attr_nocrtc.attr,
1727 NULL,
1728 };
1729
1730 static struct attribute_group uvesafb_dev_attgrp = {
1731 .name = NULL,
1732 .attrs = uvesafb_dev_attrs,
1733 };
1734
1735 static int __devinit uvesafb_probe(struct platform_device *dev)
1736 {
1737 struct fb_info *info;
1738 struct vbe_mode_ib *mode = NULL;
1739 struct uvesafb_par *par;
1740 int err = 0, i;
1741
1742 info = framebuffer_alloc(sizeof(*par) + sizeof(u32) * 256, &dev->dev);
1743 if (!info)
1744 return -ENOMEM;
1745
1746 par = info->par;
1747
1748 err = uvesafb_vbe_init(info);
1749 if (err) {
1750 printk(KERN_ERR "uvesafb: vbe_init() failed with %d\n", err);
1751 goto out;
1752 }
1753
1754 info->fbops = &uvesafb_ops;
1755
1756 i = uvesafb_vbe_init_mode(info);
1757 if (i < 0) {
1758 err = -EINVAL;
1759 goto out;
1760 } else {
1761 mode = &par->vbe_modes[i];
1762 }
1763
1764 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
1765 err = -ENXIO;
1766 goto out;
1767 }
1768
1769 uvesafb_init_info(info, mode);
1770
1771 if (!request_mem_region(info->fix.smem_start, info->fix.smem_len,
1772 "uvesafb")) {
1773 printk(KERN_ERR "uvesafb: cannot reserve video memory at "
1774 "0x%lx\n", info->fix.smem_start);
1775 err = -EIO;
1776 goto out_mode;
1777 }
1778
1779 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
1780
1781 if (!info->screen_base) {
1782 printk(KERN_ERR
1783 "uvesafb: abort, cannot ioremap 0x%x bytes of video "
1784 "memory at 0x%lx\n",
1785 info->fix.smem_len, info->fix.smem_start);
1786 err = -EIO;
1787 goto out_mem;
1788 }
1789
1790 if (!request_region(0x3c0, 32, "uvesafb")) {
1791 printk(KERN_ERR "uvesafb: request region 0x3c0-0x3e0 failed\n");
1792 err = -EIO;
1793 goto out_unmap;
1794 }
1795
1796 uvesafb_init_mtrr(info);
1797 platform_set_drvdata(dev, info);
1798
1799 if (register_framebuffer(info) < 0) {
1800 printk(KERN_ERR
1801 "uvesafb: failed to register framebuffer device\n");
1802 err = -EINVAL;
1803 goto out_reg;
1804 }
1805
1806 printk(KERN_INFO "uvesafb: framebuffer at 0x%lx, mapped to 0x%p, "
1807 "using %dk, total %dk\n", info->fix.smem_start,
1808 info->screen_base, info->fix.smem_len/1024,
1809 par->vbe_ib.total_memory * 64);
1810 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
1811 info->fix.id);
1812
1813 err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1814 if (err != 0)
1815 printk(KERN_WARNING "fb%d: failed to register attributes\n",
1816 info->node);
1817
1818 return 0;
1819
1820 out_reg:
1821 release_region(0x3c0, 32);
1822 out_unmap:
1823 iounmap(info->screen_base);
1824 out_mem:
1825 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1826 out_mode:
1827 if (!list_empty(&info->modelist))
1828 fb_destroy_modelist(&info->modelist);
1829 fb_destroy_modedb(info->monspecs.modedb);
1830 fb_dealloc_cmap(&info->cmap);
1831 out:
1832 if (par->vbe_modes)
1833 kfree(par->vbe_modes);
1834
1835 framebuffer_release(info);
1836 return err;
1837 }
1838
1839 static int uvesafb_remove(struct platform_device *dev)
1840 {
1841 struct fb_info *info = platform_get_drvdata(dev);
1842
1843 if (info) {
1844 struct uvesafb_par *par = info->par;
1845
1846 sysfs_remove_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1847 unregister_framebuffer(info);
1848 release_region(0x3c0, 32);
1849 iounmap(info->screen_base);
1850 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1851 fb_destroy_modedb(info->monspecs.modedb);
1852 fb_dealloc_cmap(&info->cmap);
1853
1854 if (par) {
1855 if (par->vbe_modes)
1856 kfree(par->vbe_modes);
1857 if (par->vbe_state_orig)
1858 kfree(par->vbe_state_orig);
1859 if (par->vbe_state_saved)
1860 kfree(par->vbe_state_saved);
1861 }
1862
1863 framebuffer_release(info);
1864 }
1865 return 0;
1866 }
1867
1868 static struct platform_driver uvesafb_driver = {
1869 .probe = uvesafb_probe,
1870 .remove = uvesafb_remove,
1871 .driver = {
1872 .name = "uvesafb",
1873 },
1874 };
1875
1876 static struct platform_device *uvesafb_device;
1877
1878 #ifndef MODULE
1879 static int __devinit uvesafb_setup(char *options)
1880 {
1881 char *this_opt;
1882
1883 if (!options || !*options)
1884 return 0;
1885
1886 while ((this_opt = strsep(&options, ",")) != NULL) {
1887 if (!*this_opt) continue;
1888
1889 if (!strcmp(this_opt, "redraw"))
1890 ypan = 0;
1891 else if (!strcmp(this_opt, "ypan"))
1892 ypan = 1;
1893 else if (!strcmp(this_opt, "ywrap"))
1894 ypan = 2;
1895 else if (!strcmp(this_opt, "vgapal"))
1896 pmi_setpal = 0;
1897 else if (!strcmp(this_opt, "pmipal"))
1898 pmi_setpal = 1;
1899 else if (!strncmp(this_opt, "mtrr:", 5))
1900 mtrr = simple_strtoul(this_opt+5, NULL, 0);
1901 else if (!strcmp(this_opt, "nomtrr"))
1902 mtrr = 0;
1903 else if (!strcmp(this_opt, "nocrtc"))
1904 nocrtc = 1;
1905 else if (!strcmp(this_opt, "noedid"))
1906 noedid = 1;
1907 else if (!strcmp(this_opt, "noblank"))
1908 blank = 0;
1909 else if (!strncmp(this_opt, "vtotal:", 7))
1910 vram_total = simple_strtoul(this_opt + 7, NULL, 0);
1911 else if (!strncmp(this_opt, "vremap:", 7))
1912 vram_remap = simple_strtoul(this_opt + 7, NULL, 0);
1913 else if (!strncmp(this_opt, "maxhf:", 6))
1914 maxhf = simple_strtoul(this_opt + 6, NULL, 0);
1915 else if (!strncmp(this_opt, "maxvf:", 6))
1916 maxvf = simple_strtoul(this_opt + 6, NULL, 0);
1917 else if (!strncmp(this_opt, "maxclk:", 7))
1918 maxclk = simple_strtoul(this_opt + 7, NULL, 0);
1919 else if (!strncmp(this_opt, "vbemode:", 8))
1920 vbemode = simple_strtoul(this_opt + 8, NULL, 0);
1921 else if (this_opt[0] >= '0' && this_opt[0] <= '9') {
1922 mode_option = this_opt;
1923 } else {
1924 printk(KERN_WARNING
1925 "uvesafb: unrecognized option %s\n", this_opt);
1926 }
1927 }
1928
1929 return 0;
1930 }
1931 #endif /* !MODULE */
1932
1933 static ssize_t show_v86d(struct device_driver *dev, char *buf)
1934 {
1935 return snprintf(buf, PAGE_SIZE, "%s\n", v86d_path);
1936 }
1937
1938 static ssize_t store_v86d(struct device_driver *dev, const char *buf,
1939 size_t count)
1940 {
1941 strncpy(v86d_path, buf, PATH_MAX);
1942 return count;
1943 }
1944
1945 static DRIVER_ATTR(v86d, S_IRUGO | S_IWUSR, show_v86d, store_v86d);
1946
1947 static int __devinit uvesafb_init(void)
1948 {
1949 int err;
1950
1951 #ifndef MODULE
1952 char *option = NULL;
1953
1954 if (fb_get_options("uvesafb", &option))
1955 return -ENODEV;
1956 uvesafb_setup(option);
1957 #endif
1958 err = cn_add_callback(&uvesafb_cn_id, "uvesafb", uvesafb_cn_callback);
1959 if (err)
1960 return err;
1961
1962 err = platform_driver_register(&uvesafb_driver);
1963
1964 if (!err) {
1965 uvesafb_device = platform_device_alloc("uvesafb", 0);
1966 if (uvesafb_device)
1967 err = platform_device_add(uvesafb_device);
1968 else
1969 err = -ENOMEM;
1970
1971 if (err) {
1972 platform_device_put(uvesafb_device);
1973 platform_driver_unregister(&uvesafb_driver);
1974 cn_del_callback(&uvesafb_cn_id);
1975 return err;
1976 }
1977
1978 err = driver_create_file(&uvesafb_driver.driver,
1979 &driver_attr_v86d);
1980 if (err) {
1981 printk(KERN_WARNING "uvesafb: failed to register "
1982 "attributes\n");
1983 err = 0;
1984 }
1985 }
1986 return err;
1987 }
1988
1989 module_init(uvesafb_init);
1990
1991 static void __devexit uvesafb_exit(void)
1992 {
1993 struct uvesafb_ktask *task;
1994
1995 if (v86d_started) {
1996 task = uvesafb_prep();
1997 if (task) {
1998 task->t.flags = TF_EXIT;
1999 uvesafb_exec(task);
2000 uvesafb_free(task);
2001 }
2002 }
2003
2004 cn_del_callback(&uvesafb_cn_id);
2005 driver_remove_file(&uvesafb_driver.driver, &driver_attr_v86d);
2006 platform_device_unregister(uvesafb_device);
2007 platform_driver_unregister(&uvesafb_driver);
2008 }
2009
2010 module_exit(uvesafb_exit);
2011
2012 static int param_get_scroll(char *buffer, struct kernel_param *kp)
2013 {
2014 return 0;
2015 }
2016
2017 static int param_set_scroll(const char *val, 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
2028 return 0;
2029 }
2030
2031 #define param_check_scroll(name, p) __param_check(name, p, void)
2032
2033 module_param_named(scroll, ypan, scroll, 0);
2034 MODULE_PARM_DESC(scroll,
2035 "Scrolling mode, set to 'redraw', 'ypan', or 'ywrap'");
2036 module_param_named(vgapal, pmi_setpal, invbool, 0);
2037 MODULE_PARM_DESC(vgapal, "Set palette using VGA registers");
2038 module_param_named(pmipal, pmi_setpal, bool, 0);
2039 MODULE_PARM_DESC(pmipal, "Set palette using PMI calls");
2040 module_param(mtrr, uint, 0);
2041 MODULE_PARM_DESC(mtrr,
2042 "Memory Type Range Registers setting. Use 0 to disable.");
2043 module_param(blank, bool, 0);
2044 MODULE_PARM_DESC(blank, "Enable hardware blanking");
2045 module_param(nocrtc, bool, 0);
2046 MODULE_PARM_DESC(nocrtc, "Ignore CRTC timings when setting modes");
2047 module_param(noedid, bool, 0);
2048 MODULE_PARM_DESC(noedid,
2049 "Ignore EDID-provided monitor limits when setting modes");
2050 module_param(vram_remap, uint, 0);
2051 MODULE_PARM_DESC(vram_remap, "Set amount of video memory to be used [MiB]");
2052 module_param(vram_total, uint, 0);
2053 MODULE_PARM_DESC(vram_total, "Set total amount of video memoery [MiB]");
2054 module_param(maxclk, ushort, 0);
2055 MODULE_PARM_DESC(maxclk, "Maximum pixelclock [MHz], overrides EDID data");
2056 module_param(maxhf, ushort, 0);
2057 MODULE_PARM_DESC(maxhf,
2058 "Maximum horizontal frequency [kHz], overrides EDID data");
2059 module_param(maxvf, ushort, 0);
2060 MODULE_PARM_DESC(maxvf,
2061 "Maximum vertical frequency [Hz], overrides EDID data");
2062 module_param(mode_option, charp, 0);
2063 MODULE_PARM_DESC(mode_option,
2064 "Specify initial video mode as \"<xres>x<yres>[-<bpp>][@<refresh>]\"");
2065 module_param(vbemode, ushort, 0);
2066 MODULE_PARM_DESC(vbemode,
2067 "VBE mode number to set, overrides the 'mode' option");
2068 module_param_string(v86d, v86d_path, PATH_MAX, 0660);
2069 MODULE_PARM_DESC(v86d, "Path to the v86d userspace helper.");
2070
2071 MODULE_LICENSE("GPL");
2072 MODULE_AUTHOR("Michal Januszewski <spock@gentoo.org>");
2073 MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards");
2074
Support for the Chinese Samsung S3C2440 based development boards