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init from v2.6.32.60
[mach-moxart.git] / drivers / video / uvesafb.c
blob6623a2e41733640f3f3568d601c8a198cc5ea3a4
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 bool pmi_setpal __devinitdata = true; /* 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 static u8 dac_width = 6;
59
60 static struct uvesafb_ktask *uvfb_tasks[UVESAFB_TASKS_MAX];
61 static DEFINE_MUTEX(uvfb_lock);
62
63 /*
64 * A handler for replies from userspace.
65 *
66 * Make sure each message passes consistency checks and if it does,
67 * find the kernel part of the task struct, copy the registers and
68 * the buffer contents and then complete the task.
69 */
70 static void uvesafb_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp)
71 {
72 struct uvesafb_task *utask;
73 struct uvesafb_ktask *task;
74
75 if (!cap_raised(nsp->eff_cap, CAP_SYS_ADMIN))
76 return;
77
78 if (msg->seq >= UVESAFB_TASKS_MAX)
79 return;
80
81 mutex_lock(&uvfb_lock);
82 task = uvfb_tasks[msg->seq];
83
84 if (!task || msg->ack != task->ack) {
85 mutex_unlock(&uvfb_lock);
86 return;
87 }
88
89 utask = (struct uvesafb_task *)msg->data;
90
91 /* Sanity checks for the buffer length. */
92 if (task->t.buf_len < utask->buf_len ||
93 utask->buf_len > msg->len - sizeof(*utask)) {
94 mutex_unlock(&uvfb_lock);
95 return;
96 }
97
98 uvfb_tasks[msg->seq] = NULL;
99 mutex_unlock(&uvfb_lock);
100
101 memcpy(&task->t, utask, sizeof(*utask));
102
103 if (task->t.buf_len && task->buf)
104 memcpy(task->buf, utask + 1, task->t.buf_len);
105
106 complete(task->done);
107 return;
108 }
109
110 static int uvesafb_helper_start(void)
111 {
112 char *envp[] = {
113 "HOME=/",
114 "PATH=/sbin:/bin",
115 NULL,
116 };
117
118 char *argv[] = {
119 v86d_path,
120 NULL,
121 };
122
123 return call_usermodehelper(v86d_path, argv, envp, 1);
124 }
125
126 /*
127 * Execute a uvesafb task.
128 *
129 * Returns 0 if the task is executed successfully.
130 *
131 * A message sent to the userspace consists of the uvesafb_task
132 * struct and (optionally) a buffer. The uvesafb_task struct is
133 * a simplified version of uvesafb_ktask (its kernel counterpart)
134 * containing only the register values, flags and the length of
135 * the buffer.
136 *
137 * Each message is assigned a sequence number (increased linearly)
138 * and a random ack number. The sequence number is used as a key
139 * for the uvfb_tasks array which holds pointers to uvesafb_ktask
140 * structs for all requests.
141 */
142 static int uvesafb_exec(struct uvesafb_ktask *task)
143 {
144 static int seq;
145 struct cn_msg *m;
146 int err;
147 int len = sizeof(task->t) + task->t.buf_len;
148
149 /*
150 * Check whether the message isn't longer than the maximum
151 * allowed by connector.
152 */
153 if (sizeof(*m) + len > CONNECTOR_MAX_MSG_SIZE) {
154 printk(KERN_WARNING "uvesafb: message too long (%d), "
155 "can't execute task\n", (int)(sizeof(*m) + len));
156 return -E2BIG;
157 }
158
159 m = kzalloc(sizeof(*m) + len, GFP_KERNEL);
160 if (!m)
161 return -ENOMEM;
162
163 init_completion(task->done);
164
165 memcpy(&m->id, &uvesafb_cn_id, sizeof(m->id));
166 m->seq = seq;
167 m->len = len;
168 m->ack = random32();
169
170 /* uvesafb_task structure */
171 memcpy(m + 1, &task->t, sizeof(task->t));
172
173 /* Buffer */
174 memcpy((u8 *)(m + 1) + sizeof(task->t), task->buf, task->t.buf_len);
175
176 /*
177 * Save the message ack number so that we can find the kernel
178 * part of this task when a reply is received from userspace.
179 */
180 task->ack = m->ack;
181
182 mutex_lock(&uvfb_lock);
183
184 /* If all slots are taken -- bail out. */
185 if (uvfb_tasks[seq]) {
186 mutex_unlock(&uvfb_lock);
187 err = -EBUSY;
188 goto out;
189 }
190
191 /* Save a pointer to the kernel part of the task struct. */
192 uvfb_tasks[seq] = task;
193 mutex_unlock(&uvfb_lock);
194
195 err = cn_netlink_send(m, 0, GFP_KERNEL);
196 if (err == -ESRCH) {
197 /*
198 * Try to start the userspace helper if sending
199 * the request failed the first time.
200 */
201 err = uvesafb_helper_start();
202 if (err) {
203 printk(KERN_ERR "uvesafb: failed to execute %s\n",
204 v86d_path);
205 printk(KERN_ERR "uvesafb: make sure that the v86d "
206 "helper is installed and executable\n");
207 } else {
208 v86d_started = 1;
209 err = cn_netlink_send(m, 0, gfp_any());
210 if (err == -ENOBUFS)
211 err = 0;
212 }
213 } else if (err == -ENOBUFS)
214 err = 0;
215
216 if (!err && !(task->t.flags & TF_EXIT))
217 err = !wait_for_completion_timeout(task->done,
218 msecs_to_jiffies(UVESAFB_TIMEOUT));
219
220 mutex_lock(&uvfb_lock);
221 uvfb_tasks[seq] = NULL;
222 mutex_unlock(&uvfb_lock);
223
224 seq++;
225 if (seq >= UVESAFB_TASKS_MAX)
226 seq = 0;
227 out:
228 kfree(m);
229 return err;
230 }
231
232 /*
233 * Free a uvesafb_ktask struct.
234 */
235 static void uvesafb_free(struct uvesafb_ktask *task)
236 {
237 if (task) {
238 if (task->done)
239 kfree(task->done);
240 kfree(task);
241 }
242 }
243
244 /*
245 * Prepare a uvesafb_ktask struct to be used again.
246 */
247 static void uvesafb_reset(struct uvesafb_ktask *task)
248 {
249 struct completion *cpl = task->done;
250
251 memset(task, 0, sizeof(*task));
252 task->done = cpl;
253 }
254
255 /*
256 * Allocate and prepare a uvesafb_ktask struct.
257 */
258 static struct uvesafb_ktask *uvesafb_prep(void)
259 {
260 struct uvesafb_ktask *task;
261
262 task = kzalloc(sizeof(*task), GFP_KERNEL);
263 if (task) {
264 task->done = kzalloc(sizeof(*task->done), GFP_KERNEL);
265 if (!task->done) {
266 kfree(task);
267 task = NULL;
268 }
269 }
270 return task;
271 }
272
273 static void uvesafb_setup_var(struct fb_var_screeninfo *var,
274 struct fb_info *info, struct vbe_mode_ib *mode)
275 {
276 struct uvesafb_par *par = info->par;
277
278 var->vmode = FB_VMODE_NONINTERLACED;
279 var->sync = FB_SYNC_VERT_HIGH_ACT;
280
281 var->xres = mode->x_res;
282 var->yres = mode->y_res;
283 var->xres_virtual = mode->x_res;
284 var->yres_virtual = (par->ypan) ?
285 info->fix.smem_len / mode->bytes_per_scan_line :
286 mode->y_res;
287 var->xoffset = 0;
288 var->yoffset = 0;
289 var->bits_per_pixel = mode->bits_per_pixel;
290
291 if (var->bits_per_pixel == 15)
292 var->bits_per_pixel = 16;
293
294 if (var->bits_per_pixel > 8) {
295 var->red.offset = mode->red_off;
296 var->red.length = mode->red_len;
297 var->green.offset = mode->green_off;
298 var->green.length = mode->green_len;
299 var->blue.offset = mode->blue_off;
300 var->blue.length = mode->blue_len;
301 var->transp.offset = mode->rsvd_off;
302 var->transp.length = mode->rsvd_len;
303 } else {
304 var->red.offset = 0;
305 var->green.offset = 0;
306 var->blue.offset = 0;
307 var->transp.offset = 0;
308
309 var->red.length = 8;
310 var->green.length = 8;
311 var->blue.length = 8;
312 var->transp.length = 0;
313 }
314 }
315
316 static int uvesafb_vbe_find_mode(struct uvesafb_par *par,
317 int xres, int yres, int depth, unsigned char flags)
318 {
319 int i, match = -1, h = 0, d = 0x7fffffff;
320
321 for (i = 0; i < par->vbe_modes_cnt; i++) {
322 h = abs(par->vbe_modes[i].x_res - xres) +
323 abs(par->vbe_modes[i].y_res - yres) +
324 abs(depth - par->vbe_modes[i].depth);
325
326 /*
327 * We have an exact match in terms of resolution
328 * and depth.
329 */
330 if (h == 0)
331 return i;
332
333 if (h < d || (h == d && par->vbe_modes[i].depth > depth)) {
334 d = h;
335 match = i;
336 }
337 }
338 i = 1;
339
340 if (flags & UVESAFB_EXACT_DEPTH &&
341 par->vbe_modes[match].depth != depth)
342 i = 0;
343
344 if (flags & UVESAFB_EXACT_RES && d > 24)
345 i = 0;
346
347 if (i != 0)
348 return match;
349 else
350 return -1;
351 }
352
353 static u8 *uvesafb_vbe_state_save(struct uvesafb_par *par)
354 {
355 struct uvesafb_ktask *task;
356 u8 *state;
357 int err;
358
359 if (!par->vbe_state_size)
360 return NULL;
361
362 state = kmalloc(par->vbe_state_size, GFP_KERNEL);
363 if (!state)
364 return NULL;
365
366 task = uvesafb_prep();
367 if (!task) {
368 kfree(state);
369 return NULL;
370 }
371
372 task->t.regs.eax = 0x4f04;
373 task->t.regs.ecx = 0x000f;
374 task->t.regs.edx = 0x0001;
375 task->t.flags = TF_BUF_RET | TF_BUF_ESBX;
376 task->t.buf_len = par->vbe_state_size;
377 task->buf = state;
378 err = uvesafb_exec(task);
379
380 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
381 printk(KERN_WARNING "uvesafb: VBE get state call "
382 "failed (eax=0x%x, err=%d)\n",
383 task->t.regs.eax, err);
384 kfree(state);
385 state = NULL;
386 }
387
388 uvesafb_free(task);
389 return state;
390 }
391
392 static void uvesafb_vbe_state_restore(struct uvesafb_par *par, u8 *state_buf)
393 {
394 struct uvesafb_ktask *task;
395 int err;
396
397 if (!state_buf)
398 return;
399
400 task = uvesafb_prep();
401 if (!task)
402 return;
403
404 task->t.regs.eax = 0x4f04;
405 task->t.regs.ecx = 0x000f;
406 task->t.regs.edx = 0x0002;
407 task->t.buf_len = par->vbe_state_size;
408 task->t.flags = TF_BUF_ESBX;
409 task->buf = state_buf;
410
411 err = uvesafb_exec(task);
412 if (err || (task->t.regs.eax & 0xffff) != 0x004f)
413 printk(KERN_WARNING "uvesafb: VBE state restore call "
414 "failed (eax=0x%x, err=%d)\n",
415 task->t.regs.eax, err);
416
417 uvesafb_free(task);
418 }
419
420 static int __devinit uvesafb_vbe_getinfo(struct uvesafb_ktask *task,
421 struct uvesafb_par *par)
422 {
423 int err;
424
425 task->t.regs.eax = 0x4f00;
426 task->t.flags = TF_VBEIB;
427 task->t.buf_len = sizeof(struct vbe_ib);
428 task->buf = &par->vbe_ib;
429 strncpy(par->vbe_ib.vbe_signature, "VBE2", 4);
430
431 err = uvesafb_exec(task);
432 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
433 printk(KERN_ERR "uvesafb: Getting VBE info block failed "
434 "(eax=0x%x, err=%d)\n", (u32)task->t.regs.eax,
435 err);
436 return -EINVAL;
437 }
438
439 if (par->vbe_ib.vbe_version < 0x0200) {
440 printk(KERN_ERR "uvesafb: Sorry, pre-VBE 2.0 cards are "
441 "not supported.\n");
442 return -EINVAL;
443 }
444
445 if (!par->vbe_ib.mode_list_ptr) {
446 printk(KERN_ERR "uvesafb: Missing mode list!\n");
447 return -EINVAL;
448 }
449
450 printk(KERN_INFO "uvesafb: ");
451
452 /*
453 * Convert string pointers and the mode list pointer into
454 * usable addresses. Print informational messages about the
455 * video adapter and its vendor.
456 */
457 if (par->vbe_ib.oem_vendor_name_ptr)
458 printk("%s, ",
459 ((char *)task->buf) + par->vbe_ib.oem_vendor_name_ptr);
460
461 if (par->vbe_ib.oem_product_name_ptr)
462 printk("%s, ",
463 ((char *)task->buf) + par->vbe_ib.oem_product_name_ptr);
464
465 if (par->vbe_ib.oem_product_rev_ptr)
466 printk("%s, ",
467 ((char *)task->buf) + par->vbe_ib.oem_product_rev_ptr);
468
469 if (par->vbe_ib.oem_string_ptr)
470 printk("OEM: %s, ",
471 ((char *)task->buf) + par->vbe_ib.oem_string_ptr);
472
473 printk("VBE v%d.%d\n", ((par->vbe_ib.vbe_version & 0xff00) >> 8),
474 par->vbe_ib.vbe_version & 0xff);
475
476 return 0;
477 }
478
479 static int __devinit uvesafb_vbe_getmodes(struct uvesafb_ktask *task,
480 struct uvesafb_par *par)
481 {
482 int off = 0, err;
483 u16 *mode;
484
485 par->vbe_modes_cnt = 0;
486
487 /* Count available modes. */
488 mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
489 while (*mode != 0xffff) {
490 par->vbe_modes_cnt++;
491 mode++;
492 }
493
494 par->vbe_modes = kzalloc(sizeof(struct vbe_mode_ib) *
495 par->vbe_modes_cnt, GFP_KERNEL);
496 if (!par->vbe_modes)
497 return -ENOMEM;
498
499 /* Get info about all available modes. */
500 mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
501 while (*mode != 0xffff) {
502 struct vbe_mode_ib *mib;
503
504 uvesafb_reset(task);
505 task->t.regs.eax = 0x4f01;
506 task->t.regs.ecx = (u32) *mode;
507 task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
508 task->t.buf_len = sizeof(struct vbe_mode_ib);
509 task->buf = par->vbe_modes + off;
510
511 err = uvesafb_exec(task);
512 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
513 printk(KERN_WARNING "uvesafb: Getting mode info block "
514 "for mode 0x%x failed (eax=0x%x, err=%d)\n",
515 *mode, (u32)task->t.regs.eax, err);
516 mode++;
517 par->vbe_modes_cnt--;
518 continue;
519 }
520
521 mib = task->buf;
522 mib->mode_id = *mode;
523
524 /*
525 * We only want modes that are supported with the current
526 * hardware configuration, color, graphics and that have
527 * support for the LFB.
528 */
529 if ((mib->mode_attr & VBE_MODE_MASK) == VBE_MODE_MASK &&
530 mib->bits_per_pixel >= 8)
531 off++;
532 else
533 par->vbe_modes_cnt--;
534
535 mode++;
536 mib->depth = mib->red_len + mib->green_len + mib->blue_len;
537
538 /*
539 * Handle 8bpp modes and modes with broken color component
540 * lengths.
541 */
542 if (mib->depth == 0 || (mib->depth == 24 &&
543 mib->bits_per_pixel == 32))
544 mib->depth = mib->bits_per_pixel;
545 }
546
547 if (par->vbe_modes_cnt > 0)
548 return 0;
549 else
550 return -EINVAL;
551 }
552
553 /*
554 * The Protected Mode Interface is 32-bit x86 code, so we only run it on
555 * x86 and not x86_64.
556 */
557 #ifdef CONFIG_X86_32
558 static int __devinit uvesafb_vbe_getpmi(struct uvesafb_ktask *task,
559 struct uvesafb_par *par)
560 {
561 int i, err;
562
563 uvesafb_reset(task);
564 task->t.regs.eax = 0x4f0a;
565 task->t.regs.ebx = 0x0;
566 err = uvesafb_exec(task);
567
568 if ((task->t.regs.eax & 0xffff) != 0x4f || task->t.regs.es < 0xc000) {
569 par->pmi_setpal = par->ypan = 0;
570 } else {
571 par->pmi_base = (u16 *)phys_to_virt(((u32)task->t.regs.es << 4)
572 + task->t.regs.edi);
573 par->pmi_start = (u8 *)par->pmi_base + par->pmi_base[1];
574 par->pmi_pal = (u8 *)par->pmi_base + par->pmi_base[2];
575 printk(KERN_INFO "uvesafb: protected mode interface info at "
576 "%04x:%04x\n",
577 (u16)task->t.regs.es, (u16)task->t.regs.edi);
578 printk(KERN_INFO "uvesafb: pmi: set display start = %p, "
579 "set palette = %p\n", par->pmi_start,
580 par->pmi_pal);
581
582 if (par->pmi_base[3]) {
583 printk(KERN_INFO "uvesafb: pmi: ports = ");
584 for (i = par->pmi_base[3]/2;
585 par->pmi_base[i] != 0xffff; i++)
586 printk("%x ", par->pmi_base[i]);
587 printk("\n");
588
589 if (par->pmi_base[i] != 0xffff) {
590 printk(KERN_INFO "uvesafb: can't handle memory"
591 " requests, pmi disabled\n");
592 par->ypan = par->pmi_setpal = 0;
593 }
594 }
595 }
596 return 0;
597 }
598 #endif /* CONFIG_X86_32 */
599
600 /*
601 * Check whether a video mode is supported by the Video BIOS and is
602 * compatible with the monitor limits.
603 */
604 static int __devinit uvesafb_is_valid_mode(struct fb_videomode *mode,
605 struct fb_info *info)
606 {
607 if (info->monspecs.gtf) {
608 fb_videomode_to_var(&info->var, mode);
609 if (fb_validate_mode(&info->var, info))
610 return 0;
611 }
612
613 if (uvesafb_vbe_find_mode(info->par, mode->xres, mode->yres, 8,
614 UVESAFB_EXACT_RES) == -1)
615 return 0;
616
617 return 1;
618 }
619
620 static int __devinit uvesafb_vbe_getedid(struct uvesafb_ktask *task,
621 struct fb_info *info)
622 {
623 struct uvesafb_par *par = info->par;
624 int err = 0;
625
626 if (noedid || par->vbe_ib.vbe_version < 0x0300)
627 return -EINVAL;
628
629 task->t.regs.eax = 0x4f15;
630 task->t.regs.ebx = 0;
631 task->t.regs.ecx = 0;
632 task->t.buf_len = 0;
633 task->t.flags = 0;
634
635 err = uvesafb_exec(task);
636
637 if ((task->t.regs.eax & 0xffff) != 0x004f || err)
638 return -EINVAL;
639
640 if ((task->t.regs.ebx & 0x3) == 3) {
641 printk(KERN_INFO "uvesafb: VBIOS/hardware supports both "
642 "DDC1 and DDC2 transfers\n");
643 } else if ((task->t.regs.ebx & 0x3) == 2) {
644 printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC2 "
645 "transfers\n");
646 } else if ((task->t.regs.ebx & 0x3) == 1) {
647 printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC1 "
648 "transfers\n");
649 } else {
650 printk(KERN_INFO "uvesafb: VBIOS/hardware doesn't support "
651 "DDC transfers\n");
652 return -EINVAL;
653 }
654
655 task->t.regs.eax = 0x4f15;
656 task->t.regs.ebx = 1;
657 task->t.regs.ecx = task->t.regs.edx = 0;
658 task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
659 task->t.buf_len = EDID_LENGTH;
660 task->buf = kzalloc(EDID_LENGTH, GFP_KERNEL);
661
662 err = uvesafb_exec(task);
663
664 if ((task->t.regs.eax & 0xffff) == 0x004f && !err) {
665 fb_edid_to_monspecs(task->buf, &info->monspecs);
666
667 if (info->monspecs.vfmax && info->monspecs.hfmax) {
668 /*
669 * If the maximum pixel clock wasn't specified in
670 * the EDID block, set it to 300 MHz.
671 */
672 if (info->monspecs.dclkmax == 0)
673 info->monspecs.dclkmax = 300 * 1000000;
674 info->monspecs.gtf = 1;
675 }
676 } else {
677 err = -EINVAL;
678 }
679
680 kfree(task->buf);
681 return err;
682 }
683
684 static void __devinit uvesafb_vbe_getmonspecs(struct uvesafb_ktask *task,
685 struct fb_info *info)
686 {
687 struct uvesafb_par *par = info->par;
688 int i;
689
690 memset(&info->monspecs, 0, sizeof(info->monspecs));
691
692 /*
693 * If we don't get all necessary data from the EDID block,
694 * mark it as incompatible with the GTF and set nocrtc so
695 * that we always use the default BIOS refresh rate.
696 */
697 if (uvesafb_vbe_getedid(task, info)) {
698 info->monspecs.gtf = 0;
699 par->nocrtc = 1;
700 }
701
702 /* Kernel command line overrides. */
703 if (maxclk)
704 info->monspecs.dclkmax = maxclk * 1000000;
705 if (maxvf)
706 info->monspecs.vfmax = maxvf;
707 if (maxhf)
708 info->monspecs.hfmax = maxhf * 1000;
709
710 /*
711 * In case DDC transfers are not supported, the user can provide
712 * monitor limits manually. Lower limits are set to "safe" values.
713 */
714 if (info->monspecs.gtf == 0 && maxclk && maxvf && maxhf) {
715 info->monspecs.dclkmin = 0;
716 info->monspecs.vfmin = 60;
717 info->monspecs.hfmin = 29000;
718 info->monspecs.gtf = 1;
719 par->nocrtc = 0;
720 }
721
722 if (info->monspecs.gtf)
723 printk(KERN_INFO
724 "uvesafb: monitor limits: vf = %d Hz, hf = %d kHz, "
725 "clk = %d MHz\n", info->monspecs.vfmax,
726 (int)(info->monspecs.hfmax / 1000),
727 (int)(info->monspecs.dclkmax / 1000000));
728 else
729 printk(KERN_INFO "uvesafb: no monitor limits have been set, "
730 "default refresh rate will be used\n");
731
732 /* Add VBE modes to the modelist. */
733 for (i = 0; i < par->vbe_modes_cnt; i++) {
734 struct fb_var_screeninfo var;
735 struct vbe_mode_ib *mode;
736 struct fb_videomode vmode;
737
738 mode = &par->vbe_modes[i];
739 memset(&var, 0, sizeof(var));
740
741 var.xres = mode->x_res;
742 var.yres = mode->y_res;
743
744 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, &var, info);
745 fb_var_to_videomode(&vmode, &var);
746 fb_add_videomode(&vmode, &info->modelist);
747 }
748
749 /* Add valid VESA modes to our modelist. */
750 for (i = 0; i < VESA_MODEDB_SIZE; i++) {
751 if (uvesafb_is_valid_mode((struct fb_videomode *)
752 &vesa_modes[i], info))
753 fb_add_videomode(&vesa_modes[i], &info->modelist);
754 }
755
756 for (i = 0; i < info->monspecs.modedb_len; i++) {
757 if (uvesafb_is_valid_mode(&info->monspecs.modedb[i], info))
758 fb_add_videomode(&info->monspecs.modedb[i],
759 &info->modelist);
760 }
761
762 return;
763 }
764
765 static void __devinit uvesafb_vbe_getstatesize(struct uvesafb_ktask *task,
766 struct uvesafb_par *par)
767 {
768 int err;
769
770 uvesafb_reset(task);
771
772 /*
773 * Get the VBE state buffer size. We want all available
774 * hardware state data (CL = 0x0f).
775 */
776 task->t.regs.eax = 0x4f04;
777 task->t.regs.ecx = 0x000f;
778 task->t.regs.edx = 0x0000;
779 task->t.flags = 0;
780
781 err = uvesafb_exec(task);
782
783 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
784 printk(KERN_WARNING "uvesafb: VBE state buffer size "
785 "cannot be determined (eax=0x%x, err=%d)\n",
786 task->t.regs.eax, err);
787 par->vbe_state_size = 0;
788 return;
789 }
790
791 par->vbe_state_size = 64 * (task->t.regs.ebx & 0xffff);
792 }
793
794 static int __devinit uvesafb_vbe_init(struct fb_info *info)
795 {
796 struct uvesafb_ktask *task = NULL;
797 struct uvesafb_par *par = info->par;
798 int err;
799
800 task = uvesafb_prep();
801 if (!task)
802 return -ENOMEM;
803
804 err = uvesafb_vbe_getinfo(task, par);
805 if (err)
806 goto out;
807
808 err = uvesafb_vbe_getmodes(task, par);
809 if (err)
810 goto out;
811
812 par->nocrtc = nocrtc;
813 #ifdef CONFIG_X86_32
814 par->pmi_setpal = pmi_setpal;
815 par->ypan = ypan;
816
817 if (par->pmi_setpal || par->ypan) {
818 if (__supported_pte_mask & _PAGE_NX) {
819 par->pmi_setpal = par->ypan = 0;
820 printk(KERN_WARNING "uvesafb: NX protection is actively."
821 "We have better not to use the PMI.\n");
822 } else {
823 uvesafb_vbe_getpmi(task, par);
824 }
825 }
826 #else
827 /* The protected mode interface is not available on non-x86. */
828 par->pmi_setpal = par->ypan = 0;
829 #endif
830
831 INIT_LIST_HEAD(&info->modelist);
832 uvesafb_vbe_getmonspecs(task, info);
833 uvesafb_vbe_getstatesize(task, par);
834
835 out: uvesafb_free(task);
836 return err;
837 }
838
839 static int __devinit uvesafb_vbe_init_mode(struct fb_info *info)
840 {
841 struct list_head *pos;
842 struct fb_modelist *modelist;
843 struct fb_videomode *mode;
844 struct uvesafb_par *par = info->par;
845 int i, modeid;
846
847 /* Has the user requested a specific VESA mode? */
848 if (vbemode) {
849 for (i = 0; i < par->vbe_modes_cnt; i++) {
850 if (par->vbe_modes[i].mode_id == vbemode) {
851 modeid = i;
852 uvesafb_setup_var(&info->var, info,
853 &par->vbe_modes[modeid]);
854 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
855 &info->var, info);
856 /*
857 * With pixclock set to 0, the default BIOS
858 * timings will be used in set_par().
859 */
860 info->var.pixclock = 0;
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 uvesafb_setup_var(&info->var, info,
908 &par->vbe_modes[modeid]);
909 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
910 &info->var, info);
911
912 goto gotmode;
913 }
914 }
915
916 /* Look for a matching VBE mode. */
917 modeid = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres,
918 info->var.bits_per_pixel, UVESAFB_EXACT_RES);
919
920 if (modeid == -1)
921 return -EINVAL;
922
923 uvesafb_setup_var(&info->var, info, &par->vbe_modes[modeid]);
924
925 gotmode:
926 /*
927 * If we are not VBE3.0+ compliant, we're done -- the BIOS will
928 * ignore our timings anyway.
929 */
930 if (par->vbe_ib.vbe_version < 0x0300 || par->nocrtc)
931 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
932 &info->var, info);
933
934 return modeid;
935 }
936
937 static int uvesafb_setpalette(struct uvesafb_pal_entry *entries, int count,
938 int start, struct fb_info *info)
939 {
940 struct uvesafb_ktask *task;
941 #ifdef CONFIG_X86
942 struct uvesafb_par *par = info->par;
943 int i = par->mode_idx;
944 #endif
945 int err = 0;
946
947 /*
948 * We support palette modifications for 8 bpp modes only, so
949 * there can never be more than 256 entries.
950 */
951 if (start + count > 256)
952 return -EINVAL;
953
954 #ifdef CONFIG_X86
955 /* Use VGA registers if mode is VGA-compatible. */
956 if (i >= 0 && i < par->vbe_modes_cnt &&
957 par->vbe_modes[i].mode_attr & VBE_MODE_VGACOMPAT) {
958 for (i = 0; i < count; i++) {
959 outb_p(start + i, dac_reg);
960 outb_p(entries[i].red, dac_val);
961 outb_p(entries[i].green, dac_val);
962 outb_p(entries[i].blue, dac_val);
963 }
964 }
965 #ifdef CONFIG_X86_32
966 else if (par->pmi_setpal) {
967 __asm__ __volatile__(
968 "call *(%%esi)"
969 : /* no return value */
970 : "a" (0x4f09), /* EAX */
971 "b" (0), /* EBX */
972 "c" (count), /* ECX */
973 "d" (start), /* EDX */
974 "D" (entries), /* EDI */
975 "S" (&par->pmi_pal)); /* ESI */
976 }
977 #endif /* CONFIG_X86_32 */
978 else
979 #endif /* CONFIG_X86 */
980 {
981 task = uvesafb_prep();
982 if (!task)
983 return -ENOMEM;
984
985 task->t.regs.eax = 0x4f09;
986 task->t.regs.ebx = 0x0;
987 task->t.regs.ecx = count;
988 task->t.regs.edx = start;
989 task->t.flags = TF_BUF_ESDI;
990 task->t.buf_len = sizeof(struct uvesafb_pal_entry) * count;
991 task->buf = entries;
992
993 err = uvesafb_exec(task);
994 if ((task->t.regs.eax & 0xffff) != 0x004f)
995 err = 1;
996
997 uvesafb_free(task);
998 }
999 return err;
1000 }
1001
1002 static int uvesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
1003 unsigned blue, unsigned transp,
1004 struct fb_info *info)
1005 {
1006 struct uvesafb_pal_entry entry;
1007 int shift = 16 - dac_width;
1008 int err = 0;
1009
1010 if (regno >= info->cmap.len)
1011 return -EINVAL;
1012
1013 if (info->var.bits_per_pixel == 8) {
1014 entry.red = red >> shift;
1015 entry.green = green >> shift;
1016 entry.blue = blue >> shift;
1017 entry.pad = 0;
1018
1019 err = uvesafb_setpalette(&entry, 1, regno, info);
1020 } else if (regno < 16) {
1021 switch (info->var.bits_per_pixel) {
1022 case 16:
1023 if (info->var.red.offset == 10) {
1024 /* 1:5:5:5 */
1025 ((u32 *) (info->pseudo_palette))[regno] =
1026 ((red & 0xf800) >> 1) |
1027 ((green & 0xf800) >> 6) |
1028 ((blue & 0xf800) >> 11);
1029 } else {
1030 /* 0:5:6:5 */
1031 ((u32 *) (info->pseudo_palette))[regno] =
1032 ((red & 0xf800) ) |
1033 ((green & 0xfc00) >> 5) |
1034 ((blue & 0xf800) >> 11);
1035 }
1036 break;
1037
1038 case 24:
1039 case 32:
1040 red >>= 8;
1041 green >>= 8;
1042 blue >>= 8;
1043 ((u32 *)(info->pseudo_palette))[regno] =
1044 (red << info->var.red.offset) |
1045 (green << info->var.green.offset) |
1046 (blue << info->var.blue.offset);
1047 break;
1048 }
1049 }
1050 return err;
1051 }
1052
1053 static int uvesafb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
1054 {
1055 struct uvesafb_pal_entry *entries;
1056 int shift = 16 - dac_width;
1057 int i, err = 0;
1058
1059 if (info->var.bits_per_pixel == 8) {
1060 if (cmap->start + cmap->len > info->cmap.start +
1061 info->cmap.len || cmap->start < info->cmap.start)
1062 return -EINVAL;
1063
1064 entries = kmalloc(sizeof(*entries) * cmap->len, GFP_KERNEL);
1065 if (!entries)
1066 return -ENOMEM;
1067
1068 for (i = 0; i < cmap->len; i++) {
1069 entries[i].red = cmap->red[i] >> shift;
1070 entries[i].green = cmap->green[i] >> shift;
1071 entries[i].blue = cmap->blue[i] >> shift;
1072 entries[i].pad = 0;
1073 }
1074 err = uvesafb_setpalette(entries, cmap->len, cmap->start, info);
1075 kfree(entries);
1076 } else {
1077 /*
1078 * For modes with bpp > 8, we only set the pseudo palette in
1079 * the fb_info struct. We rely on uvesafb_setcolreg to do all
1080 * sanity checking.
1081 */
1082 for (i = 0; i < cmap->len; i++) {
1083 err |= uvesafb_setcolreg(cmap->start + i, cmap->red[i],
1084 cmap->green[i], cmap->blue[i],
1085 0, info);
1086 }
1087 }
1088 return err;
1089 }
1090
1091 static int uvesafb_pan_display(struct fb_var_screeninfo *var,
1092 struct fb_info *info)
1093 {
1094 #ifdef CONFIG_X86_32
1095 int offset;
1096 struct uvesafb_par *par = info->par;
1097
1098 offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;
1099
1100 /*
1101 * It turns out it's not the best idea to do panning via vm86,
1102 * so we only allow it if we have a PMI.
1103 */
1104 if (par->pmi_start) {
1105 __asm__ __volatile__(
1106 "call *(%%edi)"
1107 : /* no return value */
1108 : "a" (0x4f07), /* EAX */
1109 "b" (0), /* EBX */
1110 "c" (offset), /* ECX */
1111 "d" (offset >> 16), /* EDX */
1112 "D" (&par->pmi_start)); /* EDI */
1113 }
1114 #endif
1115 return 0;
1116 }
1117
1118 static int uvesafb_blank(int blank, struct fb_info *info)
1119 {
1120 struct uvesafb_ktask *task;
1121 int err = 1;
1122 #ifdef CONFIG_X86
1123 struct uvesafb_par *par = info->par;
1124
1125 if (par->vbe_ib.capabilities & VBE_CAP_VGACOMPAT) {
1126 int loop = 10000;
1127 u8 seq = 0, crtc17 = 0;
1128
1129 if (blank == FB_BLANK_POWERDOWN) {
1130 seq = 0x20;
1131 crtc17 = 0x00;
1132 err = 0;
1133 } else {
1134 seq = 0x00;
1135 crtc17 = 0x80;
1136 err = (blank == FB_BLANK_UNBLANK) ? 0 : -EINVAL;
1137 }
1138
1139 vga_wseq(NULL, 0x00, 0x01);
1140 seq |= vga_rseq(NULL, 0x01) & ~0x20;
1141 vga_wseq(NULL, 0x00, seq);
1142
1143 crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80;
1144 while (loop--);
1145 vga_wcrt(NULL, 0x17, crtc17);
1146 vga_wseq(NULL, 0x00, 0x03);
1147 } else
1148 #endif /* CONFIG_X86 */
1149 {
1150 task = uvesafb_prep();
1151 if (!task)
1152 return -ENOMEM;
1153
1154 task->t.regs.eax = 0x4f10;
1155 switch (blank) {
1156 case FB_BLANK_UNBLANK:
1157 task->t.regs.ebx = 0x0001;
1158 break;
1159 case FB_BLANK_NORMAL:
1160 task->t.regs.ebx = 0x0101; /* standby */
1161 break;
1162 case FB_BLANK_POWERDOWN:
1163 task->t.regs.ebx = 0x0401; /* powerdown */
1164 break;
1165 default:
1166 goto out;
1167 }
1168
1169 err = uvesafb_exec(task);
1170 if (err || (task->t.regs.eax & 0xffff) != 0x004f)
1171 err = 1;
1172 out: uvesafb_free(task);
1173 }
1174 return err;
1175 }
1176
1177 static int uvesafb_open(struct fb_info *info, int user)
1178 {
1179 struct uvesafb_par *par = info->par;
1180 int cnt = atomic_read(&par->ref_count);
1181
1182 if (!cnt && par->vbe_state_size)
1183 par->vbe_state_orig = uvesafb_vbe_state_save(par);
1184
1185 atomic_inc(&par->ref_count);
1186 return 0;
1187 }
1188
1189 static int uvesafb_release(struct fb_info *info, int user)
1190 {
1191 struct uvesafb_ktask *task = NULL;
1192 struct uvesafb_par *par = info->par;
1193 int cnt = atomic_read(&par->ref_count);
1194
1195 if (!cnt)
1196 return -EINVAL;
1197
1198 if (cnt != 1)
1199 goto out;
1200
1201 task = uvesafb_prep();
1202 if (!task)
1203 goto out;
1204
1205 /* First, try to set the standard 80x25 text mode. */
1206 task->t.regs.eax = 0x0003;
1207 uvesafb_exec(task);
1208
1209 /*
1210 * Now try to restore whatever hardware state we might have
1211 * saved when the fb device was first opened.
1212 */
1213 uvesafb_vbe_state_restore(par, par->vbe_state_orig);
1214 out:
1215 atomic_dec(&par->ref_count);
1216 if (task)
1217 uvesafb_free(task);
1218 return 0;
1219 }
1220
1221 static int uvesafb_set_par(struct fb_info *info)
1222 {
1223 struct uvesafb_par *par = info->par;
1224 struct uvesafb_ktask *task = NULL;
1225 struct vbe_crtc_ib *crtc = NULL;
1226 struct vbe_mode_ib *mode = NULL;
1227 int i, err = 0, depth = info->var.bits_per_pixel;
1228
1229 if (depth > 8 && depth != 32)
1230 depth = info->var.red.length + info->var.green.length +
1231 info->var.blue.length;
1232
1233 i = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, depth,
1234 UVESAFB_EXACT_RES | UVESAFB_EXACT_DEPTH);
1235 if (i >= 0)
1236 mode = &par->vbe_modes[i];
1237 else
1238 return -EINVAL;
1239
1240 task = uvesafb_prep();
1241 if (!task)
1242 return -ENOMEM;
1243 setmode:
1244 task->t.regs.eax = 0x4f02;
1245 task->t.regs.ebx = mode->mode_id | 0x4000; /* use LFB */
1246
1247 if (par->vbe_ib.vbe_version >= 0x0300 && !par->nocrtc &&
1248 info->var.pixclock != 0) {
1249 task->t.regs.ebx |= 0x0800; /* use CRTC data */
1250 task->t.flags = TF_BUF_ESDI;
1251 crtc = kzalloc(sizeof(struct vbe_crtc_ib), GFP_KERNEL);
1252 if (!crtc) {
1253 err = -ENOMEM;
1254 goto out;
1255 }
1256 crtc->horiz_start = info->var.xres + info->var.right_margin;
1257 crtc->horiz_end = crtc->horiz_start + info->var.hsync_len;
1258 crtc->horiz_total = crtc->horiz_end + info->var.left_margin;
1259
1260 crtc->vert_start = info->var.yres + info->var.lower_margin;
1261 crtc->vert_end = crtc->vert_start + info->var.vsync_len;
1262 crtc->vert_total = crtc->vert_end + info->var.upper_margin;
1263
1264 crtc->pixel_clock = PICOS2KHZ(info->var.pixclock) * 1000;
1265 crtc->refresh_rate = (u16)(100 * (crtc->pixel_clock /
1266 (crtc->vert_total * crtc->horiz_total)));
1267
1268 if (info->var.vmode & FB_VMODE_DOUBLE)
1269 crtc->flags |= 0x1;
1270 if (info->var.vmode & FB_VMODE_INTERLACED)
1271 crtc->flags |= 0x2;
1272 if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
1273 crtc->flags |= 0x4;
1274 if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
1275 crtc->flags |= 0x8;
1276 memcpy(&par->crtc, crtc, sizeof(*crtc));
1277 } else {
1278 memset(&par->crtc, 0, sizeof(*crtc));
1279 }
1280
1281 task->t.buf_len = sizeof(struct vbe_crtc_ib);
1282 task->buf = &par->crtc;
1283
1284 err = uvesafb_exec(task);
1285 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
1286 /*
1287 * The mode switch might have failed because we tried to
1288 * use our own timings. Try again with the default timings.
1289 */
1290 if (crtc != NULL) {
1291 printk(KERN_WARNING "uvesafb: mode switch failed "
1292 "(eax=0x%x, err=%d). Trying again with "
1293 "default timings.\n", task->t.regs.eax, err);
1294 uvesafb_reset(task);
1295 kfree(crtc);
1296 crtc = NULL;
1297 info->var.pixclock = 0;
1298 goto setmode;
1299 } else {
1300 printk(KERN_ERR "uvesafb: mode switch failed (eax="
1301 "0x%x, err=%d)\n", task->t.regs.eax, err);
1302 err = -EINVAL;
1303 goto out;
1304 }
1305 }
1306 par->mode_idx = i;
1307
1308 /* For 8bpp modes, always try to set the DAC to 8 bits. */
1309 if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC &&
1310 mode->bits_per_pixel <= 8) {
1311 uvesafb_reset(task);
1312 task->t.regs.eax = 0x4f08;
1313 task->t.regs.ebx = 0x0800;
1314
1315 err = uvesafb_exec(task);
1316 if (err || (task->t.regs.eax & 0xffff) != 0x004f ||
1317 ((task->t.regs.ebx & 0xff00) >> 8) != 8) {
1318 dac_width = 6;
1319 } else {
1320 dac_width = 8;
1321 }
1322 }
1323
1324 info->fix.visual = (info->var.bits_per_pixel == 8) ?
1325 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
1326 info->fix.line_length = mode->bytes_per_scan_line;
1327
1328 out: if (crtc != NULL)
1329 kfree(crtc);
1330 uvesafb_free(task);
1331
1332 return err;
1333 }
1334
1335 static void uvesafb_check_limits(struct fb_var_screeninfo *var,
1336 struct fb_info *info)
1337 {
1338 const struct fb_videomode *mode;
1339 struct uvesafb_par *par = info->par;
1340
1341 /*
1342 * If pixclock is set to 0, then we're using default BIOS timings
1343 * and thus don't have to perform any checks here.
1344 */
1345 if (!var->pixclock)
1346 return;
1347
1348 if (par->vbe_ib.vbe_version < 0x0300) {
1349 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, var, info);
1350 return;
1351 }
1352
1353 if (!fb_validate_mode(var, info))
1354 return;
1355
1356 mode = fb_find_best_mode(var, &info->modelist);
1357 if (mode) {
1358 if (mode->xres == var->xres && mode->yres == var->yres &&
1359 !(mode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))) {
1360 fb_videomode_to_var(var, mode);
1361 return;
1362 }
1363 }
1364
1365 if (info->monspecs.gtf && !fb_get_mode(FB_MAXTIMINGS, 0, var, info))
1366 return;
1367 /* Use default refresh rate */
1368 var->pixclock = 0;
1369 }
1370
1371 static int uvesafb_check_var(struct fb_var_screeninfo *var,
1372 struct fb_info *info)
1373 {
1374 struct uvesafb_par *par = info->par;
1375 struct vbe_mode_ib *mode = NULL;
1376 int match = -1;
1377 int depth = var->red.length + var->green.length + var->blue.length;
1378
1379 /*
1380 * Various apps will use bits_per_pixel to set the color depth,
1381 * which is theoretically incorrect, but which we'll try to handle
1382 * here.
1383 */
1384 if (depth == 0 || abs(depth - var->bits_per_pixel) >= 8)
1385 depth = var->bits_per_pixel;
1386
1387 match = uvesafb_vbe_find_mode(par, var->xres, var->yres, depth,
1388 UVESAFB_EXACT_RES);
1389 if (match == -1)
1390 return -EINVAL;
1391
1392 mode = &par->vbe_modes[match];
1393 uvesafb_setup_var(var, info, mode);
1394
1395 /*
1396 * Check whether we have remapped enough memory for this mode.
1397 * We might be called at an early stage, when we haven't remapped
1398 * any memory yet, in which case we simply skip the check.
1399 */
1400 if (var->yres * mode->bytes_per_scan_line > info->fix.smem_len
1401 && info->fix.smem_len)
1402 return -EINVAL;
1403
1404 if ((var->vmode & FB_VMODE_DOUBLE) &&
1405 !(par->vbe_modes[match].mode_attr & 0x100))
1406 var->vmode &= ~FB_VMODE_DOUBLE;
1407
1408 if ((var->vmode & FB_VMODE_INTERLACED) &&
1409 !(par->vbe_modes[match].mode_attr & 0x200))
1410 var->vmode &= ~FB_VMODE_INTERLACED;
1411
1412 uvesafb_check_limits(var, info);
1413
1414 var->xres_virtual = var->xres;
1415 var->yres_virtual = (par->ypan) ?
1416 info->fix.smem_len / mode->bytes_per_scan_line :
1417 var->yres;
1418 return 0;
1419 }
1420
1421 static struct fb_ops uvesafb_ops = {
1422 .owner = THIS_MODULE,
1423 .fb_open = uvesafb_open,
1424 .fb_release = uvesafb_release,
1425 .fb_setcolreg = uvesafb_setcolreg,
1426 .fb_setcmap = uvesafb_setcmap,
1427 .fb_pan_display = uvesafb_pan_display,
1428 .fb_blank = uvesafb_blank,
1429 .fb_fillrect = cfb_fillrect,
1430 .fb_copyarea = cfb_copyarea,
1431 .fb_imageblit = cfb_imageblit,
1432 .fb_check_var = uvesafb_check_var,
1433 .fb_set_par = uvesafb_set_par,
1434 };
1435
1436 static void __devinit uvesafb_init_info(struct fb_info *info,
1437 struct vbe_mode_ib *mode)
1438 {
1439 unsigned int size_vmode;
1440 unsigned int size_remap;
1441 unsigned int size_total;
1442 struct uvesafb_par *par = info->par;
1443 int i, h;
1444
1445 info->pseudo_palette = ((u8 *)info->par + sizeof(struct uvesafb_par));
1446 info->fix = uvesafb_fix;
1447 info->fix.ypanstep = par->ypan ? 1 : 0;
1448 info->fix.ywrapstep = (par->ypan > 1) ? 1 : 0;
1449
1450 /* Disable blanking if the user requested so. */
1451 if (!blank)
1452 info->fbops->fb_blank = NULL;
1453
1454 /*
1455 * Find out how much IO memory is required for the mode with
1456 * the highest resolution.
1457 */
1458 size_remap = 0;
1459 for (i = 0; i < par->vbe_modes_cnt; i++) {
1460 h = par->vbe_modes[i].bytes_per_scan_line *
1461 par->vbe_modes[i].y_res;
1462 if (h > size_remap)
1463 size_remap = h;
1464 }
1465 size_remap *= 2;
1466
1467 /*
1468 * size_vmode -- that is the amount of memory needed for the
1469 * used video mode, i.e. the minimum amount of
1470 * memory we need.
1471 */
1472 if (mode != NULL) {
1473 size_vmode = info->var.yres * mode->bytes_per_scan_line;
1474 } else {
1475 size_vmode = info->var.yres * info->var.xres *
1476 ((info->var.bits_per_pixel + 7) >> 3);
1477 }
1478
1479 /*
1480 * size_total -- all video memory we have. Used for mtrr
1481 * entries, resource allocation and bounds
1482 * checking.
1483 */
1484 size_total = par->vbe_ib.total_memory * 65536;
1485 if (vram_total)
1486 size_total = vram_total * 1024 * 1024;
1487 if (size_total < size_vmode)
1488 size_total = size_vmode;
1489
1490 /*
1491 * size_remap -- the amount of video memory we are going to
1492 * use for vesafb. With modern cards it is no
1493 * option to simply use size_total as th
1494 * wastes plenty of kernel address space.
1495 */
1496 if (vram_remap)
1497 size_remap = vram_remap * 1024 * 1024;
1498 if (size_remap < size_vmode)
1499 size_remap = size_vmode;
1500 if (size_remap > size_total)
1501 size_remap = size_total;
1502
1503 info->fix.smem_len = size_remap;
1504 info->fix.smem_start = mode->phys_base_ptr;
1505
1506 /*
1507 * We have to set yres_virtual here because when setup_var() was
1508 * called, smem_len wasn't defined yet.
1509 */
1510 info->var.yres_virtual = info->fix.smem_len /
1511 mode->bytes_per_scan_line;
1512
1513 if (par->ypan && info->var.yres_virtual > info->var.yres) {
1514 printk(KERN_INFO "uvesafb: scrolling: %s "
1515 "using protected mode interface, "
1516 "yres_virtual=%d\n",
1517 (par->ypan > 1) ? "ywrap" : "ypan",
1518 info->var.yres_virtual);
1519 } else {
1520 printk(KERN_INFO "uvesafb: scrolling: redraw\n");
1521 info->var.yres_virtual = info->var.yres;
1522 par->ypan = 0;
1523 }
1524
1525 info->flags = FBINFO_FLAG_DEFAULT |
1526 (par->ypan ? FBINFO_HWACCEL_YPAN : 0);
1527
1528 if (!par->ypan)
1529 info->fbops->fb_pan_display = NULL;
1530 }
1531
1532 static void __devinit uvesafb_init_mtrr(struct fb_info *info)
1533 {
1534 #ifdef CONFIG_MTRR
1535 if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) {
1536 int temp_size = info->fix.smem_len;
1537 unsigned int type = 0;
1538
1539 switch (mtrr) {
1540 case 1:
1541 type = MTRR_TYPE_UNCACHABLE;
1542 break;
1543 case 2:
1544 type = MTRR_TYPE_WRBACK;
1545 break;
1546 case 3:
1547 type = MTRR_TYPE_WRCOMB;
1548 break;
1549 case 4:
1550 type = MTRR_TYPE_WRTHROUGH;
1551 break;
1552 default:
1553 type = 0;
1554 break;
1555 }
1556
1557 if (type) {
1558 int rc;
1559
1560 /* Find the largest power-of-two */
1561 while (temp_size & (temp_size - 1))
1562 temp_size &= (temp_size - 1);
1563
1564 /* Try and find a power of two to add */
1565 do {
1566 rc = mtrr_add(info->fix.smem_start,
1567 temp_size, type, 1);
1568 temp_size >>= 1;
1569 } while (temp_size >= PAGE_SIZE && rc == -EINVAL);
1570 }
1571 }
1572 #endif /* CONFIG_MTRR */
1573 }
1574
1575
1576 static ssize_t uvesafb_show_vbe_ver(struct device *dev,
1577 struct device_attribute *attr, char *buf)
1578 {
1579 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1580 struct uvesafb_par *par = info->par;
1581
1582 return snprintf(buf, PAGE_SIZE, "%.4x\n", par->vbe_ib.vbe_version);
1583 }
1584
1585 static DEVICE_ATTR(vbe_version, S_IRUGO, uvesafb_show_vbe_ver, NULL);
1586
1587 static ssize_t uvesafb_show_vbe_modes(struct device *dev,
1588 struct device_attribute *attr, char *buf)
1589 {
1590 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1591 struct uvesafb_par *par = info->par;
1592 int ret = 0, i;
1593
1594 for (i = 0; i < par->vbe_modes_cnt && ret < PAGE_SIZE; i++) {
1595 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1596 "%dx%d-%d, 0x%.4x\n",
1597 par->vbe_modes[i].x_res, par->vbe_modes[i].y_res,
1598 par->vbe_modes[i].depth, par->vbe_modes[i].mode_id);
1599 }
1600
1601 return ret;
1602 }
1603
1604 static DEVICE_ATTR(vbe_modes, S_IRUGO, uvesafb_show_vbe_modes, NULL);
1605
1606 static ssize_t uvesafb_show_vendor(struct device *dev,
1607 struct device_attribute *attr, char *buf)
1608 {
1609 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1610 struct uvesafb_par *par = info->par;
1611
1612 if (par->vbe_ib.oem_vendor_name_ptr)
1613 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1614 (&par->vbe_ib) + par->vbe_ib.oem_vendor_name_ptr);
1615 else
1616 return 0;
1617 }
1618
1619 static DEVICE_ATTR(oem_vendor, S_IRUGO, uvesafb_show_vendor, NULL);
1620
1621 static ssize_t uvesafb_show_product_name(struct device *dev,
1622 struct device_attribute *attr, char *buf)
1623 {
1624 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1625 struct uvesafb_par *par = info->par;
1626
1627 if (par->vbe_ib.oem_product_name_ptr)
1628 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1629 (&par->vbe_ib) + par->vbe_ib.oem_product_name_ptr);
1630 else
1631 return 0;
1632 }
1633
1634 static DEVICE_ATTR(oem_product_name, S_IRUGO, uvesafb_show_product_name, NULL);
1635
1636 static ssize_t uvesafb_show_product_rev(struct device *dev,
1637 struct device_attribute *attr, char *buf)
1638 {
1639 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1640 struct uvesafb_par *par = info->par;
1641
1642 if (par->vbe_ib.oem_product_rev_ptr)
1643 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1644 (&par->vbe_ib) + par->vbe_ib.oem_product_rev_ptr);
1645 else
1646 return 0;
1647 }
1648
1649 static DEVICE_ATTR(oem_product_rev, S_IRUGO, uvesafb_show_product_rev, NULL);
1650
1651 static ssize_t uvesafb_show_oem_string(struct device *dev,
1652 struct device_attribute *attr, char *buf)
1653 {
1654 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1655 struct uvesafb_par *par = info->par;
1656
1657 if (par->vbe_ib.oem_string_ptr)
1658 return snprintf(buf, PAGE_SIZE, "%s\n",
1659 (char *)(&par->vbe_ib) + par->vbe_ib.oem_string_ptr);
1660 else
1661 return 0;
1662 }
1663
1664 static DEVICE_ATTR(oem_string, S_IRUGO, uvesafb_show_oem_string, NULL);
1665
1666 static ssize_t uvesafb_show_nocrtc(struct device *dev,
1667 struct device_attribute *attr, char *buf)
1668 {
1669 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1670 struct uvesafb_par *par = info->par;
1671
1672 return snprintf(buf, PAGE_SIZE, "%d\n", par->nocrtc);
1673 }
1674
1675 static ssize_t uvesafb_store_nocrtc(struct device *dev,
1676 struct device_attribute *attr, const char *buf, size_t count)
1677 {
1678 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1679 struct uvesafb_par *par = info->par;
1680
1681 if (count > 0) {
1682 if (buf[0] == '0')
1683 par->nocrtc = 0;
1684 else
1685 par->nocrtc = 1;
1686 }
1687 return count;
1688 }
1689
1690 static DEVICE_ATTR(nocrtc, S_IRUGO | S_IWUSR, uvesafb_show_nocrtc,
1691 uvesafb_store_nocrtc);
1692
1693 static struct attribute *uvesafb_dev_attrs[] = {
1694 &dev_attr_vbe_version.attr,
1695 &dev_attr_vbe_modes.attr,
1696 &dev_attr_oem_vendor.attr,
1697 &dev_attr_oem_product_name.attr,
1698 &dev_attr_oem_product_rev.attr,
1699 &dev_attr_oem_string.attr,
1700 &dev_attr_nocrtc.attr,
1701 NULL,
1702 };
1703
1704 static struct attribute_group uvesafb_dev_attgrp = {
1705 .name = NULL,
1706 .attrs = uvesafb_dev_attrs,
1707 };
1708
1709 static int __devinit uvesafb_probe(struct platform_device *dev)
1710 {
1711 struct fb_info *info;
1712 struct vbe_mode_ib *mode = NULL;
1713 struct uvesafb_par *par;
1714 int err = 0, i;
1715
1716 info = framebuffer_alloc(sizeof(*par) + sizeof(u32) * 256, &dev->dev);
1717 if (!info)
1718 return -ENOMEM;
1719
1720 par = info->par;
1721
1722 err = uvesafb_vbe_init(info);
1723 if (err) {
1724 printk(KERN_ERR "uvesafb: vbe_init() failed with %d\n", err);
1725 goto out;
1726 }
1727
1728 info->fbops = &uvesafb_ops;
1729
1730 i = uvesafb_vbe_init_mode(info);
1731 if (i < 0) {
1732 err = -EINVAL;
1733 goto out;
1734 } else {
1735 mode = &par->vbe_modes[i];
1736 }
1737
1738 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
1739 err = -ENXIO;
1740 goto out;
1741 }
1742
1743 uvesafb_init_info(info, mode);
1744
1745 if (!request_mem_region(info->fix.smem_start, info->fix.smem_len,
1746 "uvesafb")) {
1747 printk(KERN_ERR "uvesafb: cannot reserve video memory at "
1748 "0x%lx\n", info->fix.smem_start);
1749 err = -EIO;
1750 goto out_mode;
1751 }
1752
1753 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
1754
1755 if (!info->screen_base) {
1756 printk(KERN_ERR
1757 "uvesafb: abort, cannot ioremap 0x%x bytes of video "
1758 "memory at 0x%lx\n",
1759 info->fix.smem_len, info->fix.smem_start);
1760 err = -EIO;
1761 goto out_mem;
1762 }
1763
1764 if (!request_region(0x3c0, 32, "uvesafb")) {
1765 printk(KERN_ERR "uvesafb: request region 0x3c0-0x3e0 failed\n");
1766 err = -EIO;
1767 goto out_unmap;
1768 }
1769
1770 uvesafb_init_mtrr(info);
1771 platform_set_drvdata(dev, info);
1772
1773 if (register_framebuffer(info) < 0) {
1774 printk(KERN_ERR
1775 "uvesafb: failed to register framebuffer device\n");
1776 err = -EINVAL;
1777 goto out_reg;
1778 }
1779
1780 printk(KERN_INFO "uvesafb: framebuffer at 0x%lx, mapped to 0x%p, "
1781 "using %dk, total %dk\n", info->fix.smem_start,
1782 info->screen_base, info->fix.smem_len/1024,
1783 par->vbe_ib.total_memory * 64);
1784 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
1785 info->fix.id);
1786
1787 err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1788 if (err != 0)
1789 printk(KERN_WARNING "fb%d: failed to register attributes\n",
1790 info->node);
1791
1792 return 0;
1793
1794 out_reg:
1795 release_region(0x3c0, 32);
1796 out_unmap:
1797 iounmap(info->screen_base);
1798 out_mem:
1799 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1800 out_mode:
1801 if (!list_empty(&info->modelist))
1802 fb_destroy_modelist(&info->modelist);
1803 fb_destroy_modedb(info->monspecs.modedb);
1804 fb_dealloc_cmap(&info->cmap);
1805 out:
1806 if (par->vbe_modes)
1807 kfree(par->vbe_modes);
1808
1809 framebuffer_release(info);
1810 return err;
1811 }
1812
1813 static int uvesafb_remove(struct platform_device *dev)
1814 {
1815 struct fb_info *info = platform_get_drvdata(dev);
1816
1817 if (info) {
1818 struct uvesafb_par *par = info->par;
1819
1820 sysfs_remove_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1821 unregister_framebuffer(info);
1822 release_region(0x3c0, 32);
1823 iounmap(info->screen_base);
1824 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1825 fb_destroy_modedb(info->monspecs.modedb);
1826 fb_dealloc_cmap(&info->cmap);
1827
1828 if (par) {
1829 if (par->vbe_modes)
1830 kfree(par->vbe_modes);
1831 if (par->vbe_state_orig)
1832 kfree(par->vbe_state_orig);
1833 if (par->vbe_state_saved)
1834 kfree(par->vbe_state_saved);
1835 }
1836
1837 framebuffer_release(info);
1838 }
1839 return 0;
1840 }
1841
1842 static struct platform_driver uvesafb_driver = {
1843 .probe = uvesafb_probe,
1844 .remove = uvesafb_remove,
1845 .driver = {
1846 .name = "uvesafb",
1847 },
1848 };
1849
1850 static struct platform_device *uvesafb_device;
1851
1852 #ifndef MODULE
1853 static int __devinit uvesafb_setup(char *options)
1854 {
1855 char *this_opt;
1856
1857 if (!options || !*options)
1858 return 0;
1859
1860 while ((this_opt = strsep(&options, ",")) != NULL) {
1861 if (!*this_opt) continue;
1862
1863 if (!strcmp(this_opt, "redraw"))
1864 ypan = 0;
1865 else if (!strcmp(this_opt, "ypan"))
1866 ypan = 1;
1867 else if (!strcmp(this_opt, "ywrap"))
1868 ypan = 2;
1869 else if (!strcmp(this_opt, "vgapal"))
1870 pmi_setpal = 0;
1871 else if (!strcmp(this_opt, "pmipal"))
1872 pmi_setpal = 1;
1873 else if (!strncmp(this_opt, "mtrr:", 5))
1874 mtrr = simple_strtoul(this_opt+5, NULL, 0);
1875 else if (!strcmp(this_opt, "nomtrr"))
1876 mtrr = 0;
1877 else if (!strcmp(this_opt, "nocrtc"))
1878 nocrtc = 1;
1879 else if (!strcmp(this_opt, "noedid"))
1880 noedid = 1;
1881 else if (!strcmp(this_opt, "noblank"))
1882 blank = 0;
1883 else if (!strncmp(this_opt, "vtotal:", 7))
1884 vram_total = simple_strtoul(this_opt + 7, NULL, 0);
1885 else if (!strncmp(this_opt, "vremap:", 7))
1886 vram_remap = simple_strtoul(this_opt + 7, NULL, 0);
1887 else if (!strncmp(this_opt, "maxhf:", 6))
1888 maxhf = simple_strtoul(this_opt + 6, NULL, 0);
1889 else if (!strncmp(this_opt, "maxvf:", 6))
1890 maxvf = simple_strtoul(this_opt + 6, NULL, 0);
1891 else if (!strncmp(this_opt, "maxclk:", 7))
1892 maxclk = simple_strtoul(this_opt + 7, NULL, 0);
1893 else if (!strncmp(this_opt, "vbemode:", 8))
1894 vbemode = simple_strtoul(this_opt + 8, NULL, 0);
1895 else if (this_opt[0] >= '0' && this_opt[0] <= '9') {
1896 mode_option = this_opt;
1897 } else {
1898 printk(KERN_WARNING
1899 "uvesafb: unrecognized option %s\n", this_opt);
1900 }
1901 }
1902
1903 return 0;
1904 }
1905 #endif /* !MODULE */
1906
1907 static ssize_t show_v86d(struct device_driver *dev, char *buf)
1908 {
1909 return snprintf(buf, PAGE_SIZE, "%s\n", v86d_path);
1910 }
1911
1912 static ssize_t store_v86d(struct device_driver *dev, const char *buf,
1913 size_t count)
1914 {
1915 strncpy(v86d_path, buf, PATH_MAX);
1916 return count;
1917 }
1918
1919 static DRIVER_ATTR(v86d, S_IRUGO | S_IWUSR, show_v86d, store_v86d);
1920
1921 static int __devinit uvesafb_init(void)
1922 {
1923 int err;
1924
1925 #ifndef MODULE
1926 char *option = NULL;
1927
1928 if (fb_get_options("uvesafb", &option))
1929 return -ENODEV;
1930 uvesafb_setup(option);
1931 #endif
1932 err = cn_add_callback(&uvesafb_cn_id, "uvesafb", uvesafb_cn_callback);
1933 if (err)
1934 return err;
1935
1936 err = platform_driver_register(&uvesafb_driver);
1937
1938 if (!err) {
1939 uvesafb_device = platform_device_alloc("uvesafb", 0);
1940 if (uvesafb_device)
1941 err = platform_device_add(uvesafb_device);
1942 else
1943 err = -ENOMEM;
1944
1945 if (err) {
1946 platform_device_put(uvesafb_device);
1947 platform_driver_unregister(&uvesafb_driver);
1948 cn_del_callback(&uvesafb_cn_id);
1949 return err;
1950 }
1951
1952 err = driver_create_file(&uvesafb_driver.driver,
1953 &driver_attr_v86d);
1954 if (err) {
1955 printk(KERN_WARNING "uvesafb: failed to register "
1956 "attributes\n");
1957 err = 0;
1958 }
1959 }
1960 return err;
1961 }
1962
1963 module_init(uvesafb_init);
1964
1965 static void __devexit uvesafb_exit(void)
1966 {
1967 struct uvesafb_ktask *task;
1968
1969 if (v86d_started) {
1970 task = uvesafb_prep();
1971 if (task) {
1972 task->t.flags = TF_EXIT;
1973 uvesafb_exec(task);
1974 uvesafb_free(task);
1975 }
1976 }
1977
1978 cn_del_callback(&uvesafb_cn_id);
1979 driver_remove_file(&uvesafb_driver.driver, &driver_attr_v86d);
1980 platform_device_unregister(uvesafb_device);
1981 platform_driver_unregister(&uvesafb_driver);
1982 }
1983
1984 module_exit(uvesafb_exit);
1985
1986 #define param_get_scroll NULL
1987 static int param_set_scroll(const char *val, struct kernel_param *kp)
1988 {
1989 ypan = 0;
1990
1991 if (!strcmp(val, "redraw"))
1992 ypan = 0;
1993 else if (!strcmp(val, "ypan"))
1994 ypan = 1;
1995 else if (!strcmp(val, "ywrap"))
1996 ypan = 2;
1997 else
1998 return -EINVAL;
1999
2000 return 0;
2001 }
2002
2003 #define param_check_scroll(name, p) __param_check(name, p, void)
2004
2005 module_param_named(scroll, ypan, scroll, 0);
2006 MODULE_PARM_DESC(scroll,
2007 "Scrolling mode, set to 'redraw', 'ypan', or 'ywrap'");
2008 module_param_named(vgapal, pmi_setpal, invbool, 0);
2009 MODULE_PARM_DESC(vgapal, "Set palette using VGA registers");
2010 module_param_named(pmipal, pmi_setpal, bool, 0);
2011 MODULE_PARM_DESC(pmipal, "Set palette using PMI calls");
2012 module_param(mtrr, uint, 0);
2013 MODULE_PARM_DESC(mtrr,
2014 "Memory Type Range Registers setting. Use 0 to disable.");
2015 module_param(blank, bool, 0);
2016 MODULE_PARM_DESC(blank, "Enable hardware blanking");
2017 module_param(nocrtc, bool, 0);
2018 MODULE_PARM_DESC(nocrtc, "Ignore CRTC timings when setting modes");
2019 module_param(noedid, bool, 0);
2020 MODULE_PARM_DESC(noedid,
2021 "Ignore EDID-provided monitor limits when setting modes");
2022 module_param(vram_remap, uint, 0);
2023 MODULE_PARM_DESC(vram_remap, "Set amount of video memory to be used [MiB]");
2024 module_param(vram_total, uint, 0);
2025 MODULE_PARM_DESC(vram_total, "Set total amount of video memoery [MiB]");
2026 module_param(maxclk, ushort, 0);
2027 MODULE_PARM_DESC(maxclk, "Maximum pixelclock [MHz], overrides EDID data");
2028 module_param(maxhf, ushort, 0);
2029 MODULE_PARM_DESC(maxhf,
2030 "Maximum horizontal frequency [kHz], overrides EDID data");
2031 module_param(maxvf, ushort, 0);
2032 MODULE_PARM_DESC(maxvf,
2033 "Maximum vertical frequency [Hz], overrides EDID data");
2034 module_param(mode_option, charp, 0);
2035 MODULE_PARM_DESC(mode_option,
2036 "Specify initial video mode as \"<xres>x<yres>[-<bpp>][@<refresh>]\"");
2037 module_param(vbemode, ushort, 0);
2038 MODULE_PARM_DESC(vbemode,
2039 "VBE mode number to set, overrides the 'mode' option");
2040 module_param_string(v86d, v86d_path, PATH_MAX, 0660);
2041 MODULE_PARM_DESC(v86d, "Path to the v86d userspace helper.");
2042
2043 MODULE_LICENSE("GPL");
2044 MODULE_AUTHOR("Michal Januszewski <spock@gentoo.org>");
2045 MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards");
2046
Linux MOXA ART SoC ARM port