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