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uvesafb: the driver core
[deliverable/linux.git] / drivers / video / uvesafb.c
CommitLineData
8bdb3a2d
MJ		 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
31static struct cb_id uvesafb_cn_id = {
32 .idx = CN_IDX_V86D,
33 .val = CN_VAL_V86D_UVESAFB
34};
35static char v86d_path[PATH_MAX] = "/sbin/v86d";
36static char v86d_started; /* has v86d been started by uvesafb? */
37
38static 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
45static int mtrr __devinitdata = 3; /* enable mtrr by default */
46static int blank __devinitdata = 1; /* enable blanking by default */
47static int ypan __devinitdata = 1; /* 0: scroll, 1: ypan, 2: ywrap */
48static int pmi_setpal __devinitdata = 1; /* use PMI for palette changes */
49static int nocrtc __devinitdata; /* ignore CRTC settings */
50static int noedid __devinitdata; /* don't try DDC transfers */
51static int vram_remap __devinitdata; /* set amt. of memory to be used */
52static int vram_total __devinitdata; /* set total amount of memory */
53static u16 maxclk __devinitdata; /* maximum pixel clock */
54static u16 maxvf __devinitdata; /* maximum vertical frequency */
55static u16 maxhf __devinitdata; /* maximum horizontal frequency */
56static u16 vbemode __devinitdata; /* force use of a specific VBE mode */
57static char *mode_option __devinitdata;
58
59static struct uvesafb_ktask *uvfb_tasks[UVESAFB_TASKS_MAX];
60static 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 */
69static 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
107static 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 */
139static 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 return -EBUSY;
185 }
186
187 /* Save a pointer to the kernel part of the task struct. */
188 uvfb_tasks[seq] = task;
189 mutex_unlock(&uvfb_lock);
190
191 err = cn_netlink_send(m, 0, gfp_any());
192 if (err == -ESRCH) {
193 /*
194 * Try to start the userspace helper if sending
195 * the request failed the first time.
196 */
197 err = uvesafb_helper_start();
198 if (err) {
199 printk(KERN_ERR "uvesafb: failed to execute %s\n",
200 v86d_path);
201 printk(KERN_ERR "uvesafb: make sure that the v86d "
202 "helper is installed and executable\n");
203 } else {
204 v86d_started = 1;
205 err = cn_netlink_send(m, 0, gfp_any());
206 }
207 }
208 kfree(m);
209
210 if (!err && !(task->t.flags & TF_EXIT))
211 err = !wait_for_completion_timeout(task->done,
212 msecs_to_jiffies(UVESAFB_TIMEOUT));
213
214 mutex_lock(&uvfb_lock);
215 uvfb_tasks[seq] = NULL;
216 mutex_unlock(&uvfb_lock);
217
218 seq++;
219 if (seq >= UVESAFB_TASKS_MAX)
220 seq = 0;
221
222 return err;
223}
224
225/*
226 * Free a uvesafb_ktask struct.
227 */
228static void uvesafb_free(struct uvesafb_ktask *task)
229{
230 if (task) {
231 if (task->done)
232 kfree(task->done);
233 kfree(task);
234 }
235}
236
237/*
238 * Prepare a uvesafb_ktask struct to be used again.
239 */
240static void uvesafb_reset(struct uvesafb_ktask *task)
241{
242 struct completion *cpl = task->done;
243
244 memset(task, 0, sizeof(*task));
245 task->done = cpl;
246}
247
248/*
249 * Allocate and prepare a uvesafb_ktask struct.
250 */
251static struct uvesafb_ktask *uvesafb_prep(void)
252{
253 struct uvesafb_ktask *task;
254
255 task = kzalloc(sizeof(*task), GFP_KERNEL);
256 if (task) {
257 task->done = kzalloc(sizeof(*task->done), GFP_KERNEL);
258 if (!task->done) {
259 kfree(task);
260 task = NULL;
261 }
262 }
263 return task;
264}
265
266static void uvesafb_setup_var(struct fb_var_screeninfo *var,
267 struct fb_info *info, struct vbe_mode_ib *mode)
268{
269 struct uvesafb_par *par = info->par;
270
271 var->vmode = FB_VMODE_NONINTERLACED;
272 var->sync = FB_SYNC_VERT_HIGH_ACT;
273
274 var->xres = mode->x_res;
275 var->yres = mode->y_res;
276 var->xres_virtual = mode->x_res;
277 var->yres_virtual = (par->ypan) ?
278 info->fix.smem_len / mode->bytes_per_scan_line :
279 mode->y_res;
280 var->xoffset = 0;
281 var->yoffset = 0;
282 var->bits_per_pixel = mode->bits_per_pixel;
283
284 if (var->bits_per_pixel == 15)
285 var->bits_per_pixel = 16;
286
287 if (var->bits_per_pixel > 8) {
288 var->red.offset = mode->red_off;
289 var->red.length = mode->red_len;
290 var->green.offset = mode->green_off;
291 var->green.length = mode->green_len;
292 var->blue.offset = mode->blue_off;
293 var->blue.length = mode->blue_len;
294 var->transp.offset = mode->rsvd_off;
295 var->transp.length = mode->rsvd_len;
296 } else {
297 var->red.offset = 0;
298 var->green.offset = 0;
299 var->blue.offset = 0;
300 var->transp.offset = 0;
301
302 /*
303 * We're assuming that we can switch the DAC to 8 bits. If
304 * this proves to be incorrect, we'll update the fields
305 * later in set_par().
306 */
307 if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC) {
308 var->red.length = 8;
309 var->green.length = 8;
310 var->blue.length = 8;
311 var->transp.length = 0;
312 } else {
313 var->red.length = 6;
314 var->green.length = 6;
315 var->blue.length = 6;
316 var->transp.length = 0;
317 }
318 }
319}
320
321static int uvesafb_vbe_find_mode(struct uvesafb_par *par,
322 int xres, int yres, int depth, unsigned char flags)
323{
324 int i, match = -1, h = 0, d = 0x7fffffff;
325
326 for (i = 0; i < par->vbe_modes_cnt; i++) {
327 h = abs(par->vbe_modes[i].x_res - xres) +
328 abs(par->vbe_modes[i].y_res - yres) +
329 abs(depth - par->vbe_modes[i].depth);
330
331 /*
332 * We have an exact match in terms of resolution
333 * and depth.
334 */
335 if (h == 0)
336 return i;
337
338 if (h < d || (h == d && par->vbe_modes[i].depth > depth)) {
339 d = h;
340 match = i;
341 }
342 }
343 i = 1;
344
345 if (flags & UVESAFB_EXACT_DEPTH &&
346 par->vbe_modes[match].depth != depth)
347 i = 0;
348
349 if (flags & UVESAFB_EXACT_RES && d > 24)
350 i = 0;
351
352 if (i != 0)
353 return match;
354 else
355 return -1;
356}
357
358static u8 *uvesafb_vbe_state_save(struct uvesafb_par *par)
359{
360 struct uvesafb_ktask *task;
361 u8 *state;
362 int err;
363
364 if (!par->vbe_state_size)
365 return NULL;
366
367 state = kmalloc(par->vbe_state_size, GFP_KERNEL);
368 if (!state)
369 return NULL;
370
371 task = uvesafb_prep();
372 if (!task) {
373 kfree(state);
374 return NULL;
375 }
376
377 task->t.regs.eax = 0x4f04;
378 task->t.regs.ecx = 0x000f;
379 task->t.regs.edx = 0x0001;
380 task->t.flags = TF_BUF_RET | TF_BUF_ESBX;
381 task->t.buf_len = par->vbe_state_size;
382 task->buf = state;
383 err = uvesafb_exec(task);
384
385 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
386 printk(KERN_WARNING "uvesafb: VBE get state call "
387 "failed (eax=0x%x, err=%d)\n",
388 task->t.regs.eax, err);
389 kfree(state);
390 state = NULL;
391 }
392
393 uvesafb_free(task);
394 return state;
395}
396
397static void uvesafb_vbe_state_restore(struct uvesafb_par *par, u8 *state_buf)
398{
399 struct uvesafb_ktask *task;
400 int err;
401
402 if (!state_buf)
403 return;
404
405 task = uvesafb_prep();
406 if (!task)
407 return;
408
409 task->t.regs.eax = 0x4f04;
410 task->t.regs.ecx = 0x000f;
411 task->t.regs.edx = 0x0002;
412 task->t.buf_len = par->vbe_state_size;
413 task->t.flags = TF_BUF_ESBX;
414 task->buf = state_buf;
415
416 err = uvesafb_exec(task);
417 if (err || (task->t.regs.eax & 0xffff) != 0x004f)
418 printk(KERN_WARNING "uvesafb: VBE state restore call "
419 "failed (eax=0x%x, err=%d)\n",
420 task->t.regs.eax, err);
421
422 uvesafb_free(task);
423}
424
425static int __devinit uvesafb_vbe_getinfo(struct uvesafb_ktask *task,
426 struct uvesafb_par *par)
427{
428 int err;
429
430 task->t.regs.eax = 0x4f00;
431 task->t.flags = TF_VBEIB;
432 task->t.buf_len = sizeof(struct vbe_ib);
433 task->buf = &par->vbe_ib;
434 strncpy(par->vbe_ib.vbe_signature, "VBE2", 4);
435
436 err = uvesafb_exec(task);
437 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
438 printk(KERN_ERR "uvesafb: Getting VBE info block failed "
439 "(eax=0x%x, err=%d)\n", (u32)task->t.regs.eax,
440 err);
441 return -EINVAL;
442 }
443
444 if (par->vbe_ib.vbe_version < 0x0200) {
445 printk(KERN_ERR "uvesafb: Sorry, pre-VBE 2.0 cards are "
446 "not supported.\n");
447 return -EINVAL;
448 }
449
450 if (!par->vbe_ib.mode_list_ptr) {
451 printk(KERN_ERR "uvesafb: Missing mode list!\n");
452 return -EINVAL;
453 }
454
455 printk(KERN_INFO "uvesafb: ");
456
457 /*
458 * Convert string pointers and the mode list pointer into
459 * usable addresses. Print informational messages about the
460 * video adapter and its vendor.
461 */
462 if (par->vbe_ib.oem_vendor_name_ptr)
463 printk("%s, ",
464 ((char *)task->buf) + par->vbe_ib.oem_vendor_name_ptr);
465
466 if (par->vbe_ib.oem_product_name_ptr)
467 printk("%s, ",
468 ((char *)task->buf) + par->vbe_ib.oem_product_name_ptr);
469
470 if (par->vbe_ib.oem_product_rev_ptr)
471 printk("%s, ",
472 ((char *)task->buf) + par->vbe_ib.oem_product_rev_ptr);
473
474 if (par->vbe_ib.oem_string_ptr)
475 printk("OEM: %s, ",
476 ((char *)task->buf) + par->vbe_ib.oem_string_ptr);
477
478 printk("VBE v%d.%d\n", ((par->vbe_ib.vbe_version & 0xff00) >> 8),
479 par->vbe_ib.vbe_version & 0xff);
480
481 return 0;
482}
483
484static int __devinit uvesafb_vbe_getmodes(struct uvesafb_ktask *task,
485 struct uvesafb_par *par)
486{
487 int off = 0, err;
488 u16 *mode;
489
490 par->vbe_modes_cnt = 0;
491
492 /* Count available modes. */
493 mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
494 while (*mode != 0xffff) {
495 par->vbe_modes_cnt++;
496 mode++;
497 }
498
499 par->vbe_modes = kzalloc(sizeof(struct vbe_mode_ib) *
500 par->vbe_modes_cnt, GFP_KERNEL);
501 if (!par->vbe_modes)
502 return -ENOMEM;
503
504 /* Get info about all available modes. */
505 mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
506 while (*mode != 0xffff) {
507 struct vbe_mode_ib *mib;
508
509 uvesafb_reset(task);
510 task->t.regs.eax = 0x4f01;
511 task->t.regs.ecx = (u32) *mode;
512 task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
513 task->t.buf_len = sizeof(struct vbe_mode_ib);
514 task->buf = par->vbe_modes + off;
515
516 err = uvesafb_exec(task);
517 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
518 printk(KERN_ERR "uvesafb: Getting mode info block "
519 "for mode 0x%x failed (eax=0x%x, err=%d)\n",
520 *mode, (u32)task->t.regs.eax, err);
521 return -EINVAL;
522 }
523
524 mib = task->buf;
525 mib->mode_id = *mode;
526
527 /*
528 * We only want modes that are supported with the current
529 * hardware configuration, color, graphics and that have
530 * support for the LFB.
531 */
532 if ((mib->mode_attr & VBE_MODE_MASK) == VBE_MODE_MASK &&
533 mib->bits_per_pixel >= 8)
534 off++;
535 else
536 par->vbe_modes_cnt--;
537
538 mode++;
539 mib->depth = mib->red_len + mib->green_len + mib->blue_len;
540
541 /*
542 * Handle 8bpp modes and modes with broken color component
543 * lengths.
544 */
545 if (mib->depth == 0 || (mib->depth == 24 &&
546 mib->bits_per_pixel == 32))
547 mib->depth = mib->bits_per_pixel;
548 }
549
550 return 0;
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
558static 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 */
604static 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
620static 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
684static 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
765static 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
794static 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 uvesafb_vbe_getpmi(task, par);
819#else
820 /* The protected mode interface is not available on non-x86. */
821 par->pmi_setpal = par->ypan = 0;
822#endif
823
824 INIT_LIST_HEAD(&info->modelist);
825 uvesafb_vbe_getmonspecs(task, info);
826 uvesafb_vbe_getstatesize(task, par);
827
828out: uvesafb_free(task);
829 return err;
830}
831
832static int __devinit uvesafb_vbe_init_mode(struct fb_info *info)
833{
834 struct list_head *pos;
835 struct fb_modelist *modelist;
836 struct fb_videomode *mode;
837 struct uvesafb_par *par = info->par;
838 int i, modeid;
839
840 /* Has the user requested a specific VESA mode? */
841 if (vbemode) {
842 for (i = 0; i < par->vbe_modes_cnt; i++) {
843 if (par->vbe_modes[i].mode_id == vbemode) {
844 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
845 &info->var, info);
846 /*
847 * With pixclock set to 0, the default BIOS
848 * timings will be used in set_par().
849 */
850 info->var.pixclock = 0;
851 modeid = i;
852 goto gotmode;
853 }
854 }
855 printk(KERN_INFO "uvesafb: requested VBE mode 0x%x is "
856 "unavailable\n", vbemode);
857 vbemode = 0;
858 }
859
860 /* Count the modes in the modelist */
861 i = 0;
862 list_for_each(pos, &info->modelist)
863 i++;
864
865 /*
866 * Convert the modelist into a modedb so that we can use it with
867 * fb_find_mode().
868 */
869 mode = kzalloc(i * sizeof(*mode), GFP_KERNEL);
870 if (mode) {
871 i = 0;
872 list_for_each(pos, &info->modelist) {
873 modelist = list_entry(pos, struct fb_modelist, list);
874 mode[i] = modelist->mode;
875 i++;
876 }
877
878 if (!mode_option)
879 mode_option = UVESAFB_DEFAULT_MODE;
880
881 i = fb_find_mode(&info->var, info, mode_option, mode, i,
882 NULL, 8);
883
884 kfree(mode);
885 }
886
887 /* fb_find_mode() failed */
888 if (i == 0 || i >= 3) {
889 info->var.xres = 640;
890 info->var.yres = 480;
891 mode = (struct fb_videomode *)
892 fb_find_best_mode(&info->var, &info->modelist);
893
894 if (mode) {
895 fb_videomode_to_var(&info->var, mode);
896 } else {
897 modeid = par->vbe_modes[0].mode_id;
898 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
899 &info->var, info);
900 goto gotmode;
901 }
902 }
903
904 /* Look for a matching VBE mode. */
905 modeid = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres,
906 info->var.bits_per_pixel, UVESAFB_EXACT_RES);
907
908 if (modeid == -1)
909 return -EINVAL;
910
911gotmode:
912 uvesafb_setup_var(&info->var, info, &par->vbe_modes[modeid]);
913
914 /*
915 * If we are not VBE3.0+ compliant, we're done -- the BIOS will
916 * ignore our timings anyway.
917 */
918 if (par->vbe_ib.vbe_version < 0x0300 || par->nocrtc)
919 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
920 &info->var, info);
921
922 return modeid;
923}
924
925static int uvesafb_setpalette(struct uvesafb_pal_entry *entries, int count,
926 int start, struct fb_info *info)
927{
928 struct uvesafb_ktask *task;
929 struct uvesafb_par *par = info->par;
930 int i = par->mode_idx;
931 int err = 0;
932
933 /*
934 * We support palette modifications for 8 bpp modes only, so
935 * there can never be more than 256 entries.
936 */
937 if (start + count > 256)
938 return -EINVAL;
939
940#ifdef CONFIG_X86
941 /* Use VGA registers if mode is VGA-compatible. */
942 if (i >= 0 && i < par->vbe_modes_cnt &&
943 par->vbe_modes[i].mode_attr & VBE_MODE_VGACOMPAT) {
944 for (i = 0; i < count; i++) {
945 outb_p(start + i, dac_reg);
946 outb_p(entries[i].red, dac_val);
947 outb_p(entries[i].green, dac_val);
948 outb_p(entries[i].blue, dac_val);
949 }
950 }
951#ifdef CONFIG_X86_32
952 else if (par->pmi_setpal) {
953 __asm__ __volatile__(
954 "call *(%%esi)"
955 : /* no return value */
956 : "a" (0x4f09), /* EAX */
957 "b" (0), /* EBX */
958 "c" (count), /* ECX */
959 "d" (start), /* EDX */
960 "D" (entries), /* EDI */
961 "S" (&par->pmi_pal)); /* ESI */
962 }
963#endif /* CONFIG_X86_32 */
964 else
965#endif /* CONFIG_X86 */
966 {
967 task = uvesafb_prep();
968 if (!task)
969 return -ENOMEM;
970
971 task->t.regs.eax = 0x4f09;
972 task->t.regs.ebx = 0x0;
973 task->t.regs.ecx = count;
974 task->t.regs.edx = start;
975 task->t.flags = TF_BUF_ESDI;
976 task->t.buf_len = sizeof(struct uvesafb_pal_entry) * count;
977 task->buf = entries;
978
979 err = uvesafb_exec(task);
980 if ((task->t.regs.eax & 0xffff) != 0x004f)
981 err = 1;
982
983 uvesafb_free(task);
984 }
985 return err;
986}
987
988static int uvesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
989 unsigned blue, unsigned transp,
990 struct fb_info *info)
991{
992 struct uvesafb_pal_entry entry;
993 int shift = 16 - info->var.green.length;
994 int err = 0;
995
996 if (regno >= info->cmap.len)
997 return -EINVAL;
998
999 if (info->var.bits_per_pixel == 8) {
1000 entry.red = red >> shift;
1001 entry.green = green >> shift;
1002 entry.blue = blue >> shift;
1003 entry.pad = 0;
1004
1005 err = uvesafb_setpalette(&entry, 1, regno, info);
1006 } else if (regno < 16) {
1007 switch (info->var.bits_per_pixel) {
1008 case 16:
1009 if (info->var.red.offset == 10) {
1010 /* 1:5:5:5 */
1011 ((u32 *) (info->pseudo_palette))[regno] =
1012 ((red & 0xf800) >> 1) |
1013 ((green & 0xf800) >> 6) |
1014 ((blue & 0xf800) >> 11);
1015 } else {
1016 /* 0:5:6:5 */
1017 ((u32 *) (info->pseudo_palette))[regno] =
1018 ((red & 0xf800) ) |
1019 ((green & 0xfc00) >> 5) |
1020 ((blue & 0xf800) >> 11);
1021 }
1022 break;
1023
1024 case 24:
1025 case 32:
1026 red >>= 8;
1027 green >>= 8;
1028 blue >>= 8;
1029 ((u32 *)(info->pseudo_palette))[regno] =
1030 (red << info->var.red.offset) |
1031 (green << info->var.green.offset) |
1032 (blue << info->var.blue.offset);
1033 break;
1034 }
1035 }
1036 return err;
1037}
1038
1039static int uvesafb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
1040{
1041 struct uvesafb_pal_entry *entries;
1042 int shift = 16 - info->var.green.length;
1043 int i, err = 0;
1044
1045 if (info->var.bits_per_pixel == 8) {
1046 if (cmap->start + cmap->len > info->cmap.start +
1047 info->cmap.len || cmap->start < info->cmap.start)
1048 return -EINVAL;
1049
1050 entries = kmalloc(sizeof(*entries) * cmap->len, GFP_KERNEL);
1051 if (!entries)
1052 return -ENOMEM;
1053
1054 for (i = 0; i < cmap->len; i++) {
1055 entries[i].red = cmap->red[i] >> shift;
1056 entries[i].green = cmap->green[i] >> shift;
1057 entries[i].blue = cmap->blue[i] >> shift;
1058 entries[i].pad = 0;
1059 }
1060 err = uvesafb_setpalette(entries, cmap->len, cmap->start, info);
1061 kfree(entries);
1062 } else {
1063 /*
1064 * For modes with bpp > 8, we only set the pseudo palette in
1065 * the fb_info struct. We rely on uvesafb_setcolreg to do all
1066 * sanity checking.
1067 */
1068 for (i = 0; i < cmap->len; i++) {
1069 err |= uvesafb_setcolreg(cmap->start + i, cmap->red[i],
1070 cmap->green[i], cmap->blue[i],
1071 0, info);
1072 }
1073 }
1074 return err;
1075}
1076
1077static int uvesafb_pan_display(struct fb_var_screeninfo *var,
1078 struct fb_info *info)
1079{
1080#ifdef CONFIG_X86_32
1081 int offset;
1082 struct uvesafb_par *par = info->par;
1083
1084 offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;
1085
1086 /*
1087 * It turns out it's not the best idea to do panning via vm86,
1088 * so we only allow it if we have a PMI.
1089 */
1090 if (par->pmi_start) {
1091 __asm__ __volatile__(
1092 "call *(%%edi)"
1093 : /* no return value */
1094 : "a" (0x4f07), /* EAX */
1095 "b" (0), /* EBX */
1096 "c" (offset), /* ECX */
1097 "d" (offset >> 16), /* EDX */
1098 "D" (&par->pmi_start)); /* EDI */
1099 }
1100#endif
1101 return 0;
1102}
1103
1104static int uvesafb_blank(int blank, struct fb_info *info)
1105{
1106 struct uvesafb_par *par = info->par;
1107 struct uvesafb_ktask *task;
1108 int err = 1;
1109
1110#ifdef CONFIG_X86
1111 if (par->vbe_ib.capabilities & VBE_CAP_VGACOMPAT) {
1112 int loop = 10000;
1113 u8 seq = 0, crtc17 = 0;
1114
1115 if (blank == FB_BLANK_POWERDOWN) {
1116 seq = 0x20;
1117 crtc17 = 0x00;
1118 err = 0;
1119 } else {
1120 seq = 0x00;
1121 crtc17 = 0x80;
1122 err = (blank == FB_BLANK_UNBLANK) ? 0 : -EINVAL;
1123 }
1124
1125 vga_wseq(NULL, 0x00, 0x01);
1126 seq |= vga_rseq(NULL, 0x01) & ~0x20;
1127 vga_wseq(NULL, 0x00, seq);
1128
1129 crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80;
1130 while (loop--);
1131 vga_wcrt(NULL, 0x17, crtc17);
1132 vga_wseq(NULL, 0x00, 0x03);
1133 } else
1134#endif /* CONFIG_X86 */
1135 {
1136 task = uvesafb_prep();
1137 if (!task)
1138 return -ENOMEM;
1139
1140 task->t.regs.eax = 0x4f10;
1141 switch (blank) {
1142 case FB_BLANK_UNBLANK:
1143 task->t.regs.ebx = 0x0001;
1144 break;
1145 case FB_BLANK_NORMAL:
1146 task->t.regs.ebx = 0x0101; /* standby */
1147 break;
1148 case FB_BLANK_POWERDOWN:
1149 task->t.regs.ebx = 0x0401; /* powerdown */
1150 break;
1151 default:
1152 goto out;
1153 }
1154
1155 err = uvesafb_exec(task);
1156 if (err || (task->t.regs.eax & 0xffff) != 0x004f)
1157 err = 1;
1158out: uvesafb_free(task);
1159 }
1160 return err;
1161}
1162
1163static int uvesafb_open(struct fb_info *info, int user)
1164{
1165 struct uvesafb_par *par = info->par;
1166 int cnt = atomic_read(&par->ref_count);
1167
1168 if (!cnt && par->vbe_state_size)
1169 par->vbe_state_orig = uvesafb_vbe_state_save(par);
1170
1171 atomic_inc(&par->ref_count);
1172 return 0;
1173}
1174
1175static int uvesafb_release(struct fb_info *info, int user)
1176{
1177 struct uvesafb_ktask *task = NULL;
1178 struct uvesafb_par *par = info->par;
1179 int cnt = atomic_read(&par->ref_count);
1180
1181 if (!cnt)
1182 return -EINVAL;
1183
1184 if (cnt != 1)
1185 goto out;
1186
1187 task = uvesafb_prep();
1188 if (!task)
1189 goto out;
1190
1191 /* First, try to set the standard 80x25 text mode. */
1192 task->t.regs.eax = 0x0003;
1193 uvesafb_exec(task);
1194
1195 /*
1196 * Now try to restore whatever hardware state we might have
1197 * saved when the fb device was first opened.
1198 */
1199 uvesafb_vbe_state_restore(par, par->vbe_state_orig);
1200out:
1201 atomic_dec(&par->ref_count);
1202 if (task)
1203 uvesafb_free(task);
1204 return 0;
1205}
1206
1207static int uvesafb_set_par(struct fb_info *info)
1208{
1209 struct uvesafb_par *par = info->par;
1210 struct uvesafb_ktask *task = NULL;
1211 struct vbe_crtc_ib *crtc = NULL;
1212 struct vbe_mode_ib *mode = NULL;
1213 int i, err = 0, depth = info->var.bits_per_pixel;
1214
1215 if (depth > 8 && depth != 32)
1216 depth = info->var.red.length + info->var.green.length +
1217 info->var.blue.length;
1218
1219 i = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, depth,
1220 UVESAFB_EXACT_RES | UVESAFB_EXACT_DEPTH);
1221 if (i >= 0)
1222 mode = &par->vbe_modes[i];
1223 else
1224 return -EINVAL;
1225
1226 task = uvesafb_prep();
1227 if (!task)
1228 return -ENOMEM;
1229setmode:
1230 task->t.regs.eax = 0x4f02;
1231 task->t.regs.ebx = mode->mode_id | 0x4000; /* use LFB */
1232
1233 if (par->vbe_ib.vbe_version >= 0x0300 && !par->nocrtc &&
1234 info->var.pixclock != 0) {
1235 task->t.regs.ebx |= 0x0800; /* use CRTC data */
1236 task->t.flags = TF_BUF_ESDI;
1237 crtc = kzalloc(sizeof(struct vbe_crtc_ib), GFP_KERNEL);
1238 if (!crtc) {
1239 err = -ENOMEM;
1240 goto out;
1241 }
1242 crtc->horiz_start = info->var.xres + info->var.right_margin;
1243 crtc->horiz_end = crtc->horiz_start + info->var.hsync_len;
1244 crtc->horiz_total = crtc->horiz_end + info->var.left_margin;
1245
1246 crtc->vert_start = info->var.yres + info->var.lower_margin;
1247 crtc->vert_end = crtc->vert_start + info->var.vsync_len;
1248 crtc->vert_total = crtc->vert_end + info->var.upper_margin;
1249
1250 crtc->pixel_clock = PICOS2KHZ(info->var.pixclock) * 1000;
1251 crtc->refresh_rate = (u16)(100 * (crtc->pixel_clock /
1252 (crtc->vert_total * crtc->horiz_total)));
1253
1254 if (info->var.vmode & FB_VMODE_DOUBLE)
1255 crtc->flags |= 0x1;
1256 if (info->var.vmode & FB_VMODE_INTERLACED)
1257 crtc->flags |= 0x2;
1258 if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
1259 crtc->flags |= 0x4;
1260 if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
1261 crtc->flags |= 0x8;
1262 memcpy(&par->crtc, crtc, sizeof(*crtc));
1263 } else {
1264 memset(&par->crtc, 0, sizeof(*crtc));
1265 }
1266
1267 task->t.buf_len = sizeof(struct vbe_crtc_ib);
1268 task->buf = &par->crtc;
1269
1270 err = uvesafb_exec(task);
1271 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
1272 /*
1273 * The mode switch might have failed because we tried to
1274 * use our own timings. Try again with the default timings.
1275 */
1276 if (crtc != NULL) {
1277 printk(KERN_WARNING "uvesafb: mode switch failed "
1278 "(eax=0x%x, err=%d). Trying again with "
1279 "default timings.\n", task->t.regs.eax, err);
1280 uvesafb_reset(task);
1281 kfree(crtc);
1282 crtc = NULL;
1283 info->var.pixclock = 0;
1284 goto setmode;
1285 } else {
1286 printk(KERN_ERR "uvesafb: mode switch failed (eax="
1287 "0x%x, err=%d)\n", task->t.regs.eax, err);
1288 err = -EINVAL;
1289 goto out;
1290 }
1291 }
1292 par->mode_idx = i;
1293
1294 /* For 8bpp modes, always try to set the DAC to 8 bits. */
1295 if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC &&
1296 mode->bits_per_pixel <= 8) {
1297 uvesafb_reset(task);
1298 task->t.regs.eax = 0x4f08;
1299 task->t.regs.ebx = 0x0800;
1300
1301 err = uvesafb_exec(task);
1302 if (err || (task->t.regs.eax & 0xffff) != 0x004f ||
1303 ((task->t.regs.ebx & 0xff00) >> 8) != 8) {
1304 /*
1305 * We've failed to set the DAC palette format -
1306 * time to correct var.
1307 */
1308 info->var.red.length = 6;
1309 info->var.green.length = 6;
1310 info->var.blue.length = 6;
1311 }
1312 }
1313
1314 info->fix.visual = (info->var.bits_per_pixel == 8) ?
1315 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
1316 info->fix.line_length = mode->bytes_per_scan_line;
1317
1318out: if (crtc != NULL)
1319 kfree(crtc);
1320 uvesafb_free(task);
1321
1322 return err;
1323}
1324
1325static void uvesafb_check_limits(struct fb_var_screeninfo *var,
1326 struct fb_info *info)
1327{
1328 const struct fb_videomode *mode;
1329 struct uvesafb_par *par = info->par;
1330
1331 /*
1332 * If pixclock is set to 0, then we're using default BIOS timings
1333 * and thus don't have to perform any checks here.
1334 */
1335 if (!var->pixclock)
1336 return;
1337
1338 if (par->vbe_ib.vbe_version < 0x0300) {
1339 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, var, info);
1340 return;
1341 }
1342
1343 if (!fb_validate_mode(var, info))
1344 return;
1345
1346 mode = fb_find_best_mode(var, &info->modelist);
1347 if (mode) {
1348 if (mode->xres == var->xres && mode->yres == var->yres &&
1349 !(mode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))) {
1350 fb_videomode_to_var(var, mode);
1351 return;
1352 }
1353 }
1354
1355 if (info->monspecs.gtf && !fb_get_mode(FB_MAXTIMINGS, 0, var, info))
1356 return;
1357 /* Use default refresh rate */
1358 var->pixclock = 0;
1359}
1360
1361static int uvesafb_check_var(struct fb_var_screeninfo *var,
1362 struct fb_info *info)
1363{
1364 struct uvesafb_par *par = info->par;
1365 struct vbe_mode_ib *mode = NULL;
1366 int match = -1;
1367 int depth = var->red.length + var->green.length + var->blue.length;
1368
1369 /*
1370 * Various apps will use bits_per_pixel to set the color depth,
1371 * which is theoretically incorrect, but which we'll try to handle
1372 * here.
1373 */
1374 if (depth == 0 || abs(depth - var->bits_per_pixel) >= 8)
1375 depth = var->bits_per_pixel;
1376
1377 match = uvesafb_vbe_find_mode(par, var->xres, var->yres, depth,
1378 UVESAFB_EXACT_RES);
1379 if (match == -1)
1380 return -EINVAL;
1381
1382 mode = &par->vbe_modes[match];
1383 uvesafb_setup_var(var, info, mode);
1384
1385 /*
1386 * Check whether we have remapped enough memory for this mode.
1387 * We might be called at an early stage, when we haven't remapped
1388 * any memory yet, in which case we simply skip the check.
1389 */
1390 if (var->yres * mode->bytes_per_scan_line > info->fix.smem_len
1391 && info->fix.smem_len)
1392 return -EINVAL;
1393
1394 if ((var->vmode & FB_VMODE_DOUBLE) &&
1395 !(par->vbe_modes[match].mode_attr & 0x100))
1396 var->vmode &= ~FB_VMODE_DOUBLE;
1397
1398 if ((var->vmode & FB_VMODE_INTERLACED) &&
1399 !(par->vbe_modes[match].mode_attr & 0x200))
1400 var->vmode &= ~FB_VMODE_INTERLACED;
1401
1402 uvesafb_check_limits(var, info);
1403
1404 var->xres_virtual = var->xres;
1405 var->yres_virtual = (par->ypan) ?
1406 info->fix.smem_len / mode->bytes_per_scan_line :
1407 var->yres;
1408 return 0;
1409}
1410
1411static void uvesafb_save_state(struct fb_info *info)
1412{
1413 struct uvesafb_par *par = info->par;
1414
1415 if (par->vbe_state_saved)
1416 kfree(par->vbe_state_saved);
1417
1418 par->vbe_state_saved = uvesafb_vbe_state_save(par);
1419}
1420
1421static void uvesafb_restore_state(struct fb_info *info)
1422{
1423 struct uvesafb_par *par = info->par;
1424
1425 uvesafb_vbe_state_restore(par, par->vbe_state_saved);
1426}
1427
1428static struct fb_ops uvesafb_ops = {
1429 .owner = THIS_MODULE,
1430 .fb_open = uvesafb_open,
1431 .fb_release = uvesafb_release,
1432 .fb_setcolreg = uvesafb_setcolreg,
1433 .fb_setcmap = uvesafb_setcmap,
1434 .fb_pan_display = uvesafb_pan_display,
1435 .fb_blank = uvesafb_blank,
1436 .fb_fillrect = cfb_fillrect,
1437 .fb_copyarea = cfb_copyarea,
1438 .fb_imageblit = cfb_imageblit,
1439 .fb_check_var = uvesafb_check_var,
1440 .fb_set_par = uvesafb_set_par,
1441 .fb_save_state = uvesafb_save_state,
1442 .fb_restore_state = uvesafb_restore_state,
1443};
1444
1445static void __devinit uvesafb_init_info(struct fb_info *info,
1446 struct vbe_mode_ib *mode)
1447{
1448 unsigned int size_vmode;
1449 unsigned int size_remap;
1450 unsigned int size_total;
1451 struct uvesafb_par *par = info->par;
1452 int i, h;
1453
1454 info->pseudo_palette = ((u8 *)info->par + sizeof(struct uvesafb_par));
1455 info->fix = uvesafb_fix;
1456 info->fix.ypanstep = par->ypan ? 1 : 0;
1457 info->fix.ywrapstep = (par->ypan > 1) ? 1 : 0;
1458
1459 /*
1460 * If we were unable to get the state buffer size, disable
1461 * functions for saving and restoring the hardware state.
1462 */
1463 if (par->vbe_state_size == 0) {
1464 info->fbops->fb_save_state = NULL;
1465 info->fbops->fb_restore_state = NULL;
1466 }
1467
1468 /* Disable blanking if the user requested so. */
1469 if (!blank)
1470 info->fbops->fb_blank = NULL;
1471
1472 /*
1473 * Find out how much IO memory is required for the mode with
1474 * the highest resolution.
1475 */
1476 size_remap = 0;
1477 for (i = 0; i < par->vbe_modes_cnt; i++) {
1478 h = par->vbe_modes[i].bytes_per_scan_line *
1479 par->vbe_modes[i].y_res;
1480 if (h > size_remap)
1481 size_remap = h;
1482 }
1483 size_remap *= 2;
1484
1485 /*
1486 * size_vmode -- that is the amount of memory needed for the
1487 * used video mode, i.e. the minimum amount of
1488 * memory we need.
1489 */
1490 if (mode != NULL) {
1491 size_vmode = info->var.yres * mode->bytes_per_scan_line;
1492 } else {
1493 size_vmode = info->var.yres * info->var.xres *
1494 ((info->var.bits_per_pixel + 7) >> 3);
1495 }
1496
1497 /*
1498 * size_total -- all video memory we have. Used for mtrr
1499 * entries, resource allocation and bounds
1500 * checking.
1501 */
1502 size_total = par->vbe_ib.total_memory * 65536;
1503 if (vram_total)
1504 size_total = vram_total * 1024 * 1024;
1505 if (size_total < size_vmode)
1506 size_total = size_vmode;
1507
1508 /*
1509 * size_remap -- the amount of video memory we are going to
1510 * use for vesafb. With modern cards it is no
1511 * option to simply use size_total as th
1512 * wastes plenty of kernel address space.
1513 */
1514 if (vram_remap)
1515 size_remap = vram_remap * 1024 * 1024;
1516 if (size_remap < size_vmode)
1517 size_remap = size_vmode;
1518 if (size_remap > size_total)
1519 size_remap = size_total;
1520
1521 info->fix.smem_len = size_remap;
1522 info->fix.smem_start = mode->phys_base_ptr;
1523
1524 /*
1525 * We have to set yres_virtual here because when setup_var() was
1526 * called, smem_len wasn't defined yet.
1527 */
1528 info->var.yres_virtual = info->fix.smem_len /
1529 mode->bytes_per_scan_line;
1530
1531 if (par->ypan && info->var.yres_virtual > info->var.yres) {
1532 printk(KERN_INFO "uvesafb: scrolling: %s "
1533 "using protected mode interface, "
1534 "yres_virtual=%d\n",
1535 (par->ypan > 1) ? "ywrap" : "ypan",
1536 info->var.yres_virtual);
1537 } else {
1538 printk(KERN_INFO "uvesafb: scrolling: redraw\n");
1539 info->var.yres_virtual = info->var.yres;
1540 par->ypan = 0;
1541 }
1542
1543 info->flags = FBINFO_FLAG_DEFAULT |
1544 (par->ypan) ? FBINFO_HWACCEL_YPAN : 0;
1545
1546 if (!par->ypan)
1547 info->fbops->fb_pan_display = NULL;
1548}
1549
1550static void uvesafb_init_mtrr(struct fb_info *info)
1551{
1552#ifdef CONFIG_MTRR
1553 if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) {
1554 int temp_size = info->fix.smem_len;
1555 unsigned int type = 0;
1556
1557 switch (mtrr) {
1558 case 1:
1559 type = MTRR_TYPE_UNCACHABLE;
1560 break;
1561 case 2:
1562 type = MTRR_TYPE_WRBACK;
1563 break;
1564 case 3:
1565 type = MTRR_TYPE_WRCOMB;
1566 break;
1567 case 4:
1568 type = MTRR_TYPE_WRTHROUGH;
1569 break;
1570 default:
1571 type = 0;
1572 break;
1573 }
1574
1575 if (type) {
1576 int rc;
1577
1578 /* Find the largest power-of-two */
1579 while (temp_size & (temp_size - 1))
1580 temp_size &= (temp_size - 1);
1581
1582 /* Try and find a power of two to add */
1583 do {
1584 rc = mtrr_add(info->fix.smem_start,
1585 temp_size, type, 1);
1586 temp_size >>= 1;
1587 } while (temp_size >= PAGE_SIZE && rc == -EINVAL);
1588 }
1589 }
1590#endif /* CONFIG_MTRR */
1591}
1592
1593
1594static ssize_t uvesafb_show_vbe_ver(struct device *dev,
1595 struct device_attribute *attr, char *buf)
1596{
1597 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1598 struct uvesafb_par *par = info->par;
1599
1600 return snprintf(buf, PAGE_SIZE, "%.4x\n", par->vbe_ib.vbe_version);
1601}
1602
1603static DEVICE_ATTR(vbe_version, S_IRUGO, uvesafb_show_vbe_ver, NULL);
1604
1605static ssize_t uvesafb_show_vbe_modes(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 int ret = 0, i;
1611
1612 for (i = 0; i < par->vbe_modes_cnt && ret < PAGE_SIZE; i++) {
1613 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1614 "%dx%d-%d, 0x%.4x\n",
1615 par->vbe_modes[i].x_res, par->vbe_modes[i].y_res,
1616 par->vbe_modes[i].depth, par->vbe_modes[i].mode_id);
1617 }
1618
1619 return ret;
1620}
1621
1622static DEVICE_ATTR(vbe_modes, S_IRUGO, uvesafb_show_vbe_modes, NULL);
1623
1624static ssize_t uvesafb_show_vendor(struct device *dev,
1625 struct device_attribute *attr, char *buf)
1626{
1627 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1628 struct uvesafb_par *par = info->par;
1629
1630 if (par->vbe_ib.oem_vendor_name_ptr)
1631 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1632 (&par->vbe_ib) + par->vbe_ib.oem_vendor_name_ptr);
1633 else
1634 return 0;
1635}
1636
1637static DEVICE_ATTR(oem_vendor, S_IRUGO, uvesafb_show_vendor, NULL);
1638
1639static ssize_t uvesafb_show_product_name(struct device *dev,
1640 struct device_attribute *attr, char *buf)
1641{
1642 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1643 struct uvesafb_par *par = info->par;
1644
1645 if (par->vbe_ib.oem_product_name_ptr)
1646 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1647 (&par->vbe_ib) + par->vbe_ib.oem_product_name_ptr);
1648 else
1649 return 0;
1650}
1651
1652static DEVICE_ATTR(oem_product_name, S_IRUGO, uvesafb_show_product_name, NULL);
1653
1654static ssize_t uvesafb_show_product_rev(struct device *dev,
1655 struct device_attribute *attr, char *buf)
1656{
1657 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1658 struct uvesafb_par *par = info->par;
1659
1660 if (par->vbe_ib.oem_product_rev_ptr)
1661 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1662 (&par->vbe_ib) + par->vbe_ib.oem_product_rev_ptr);
1663 else
1664 return 0;
1665}
1666
1667static DEVICE_ATTR(oem_product_rev, S_IRUGO, uvesafb_show_product_rev, NULL);
1668
1669static ssize_t uvesafb_show_oem_string(struct device *dev,
1670 struct device_attribute *attr, char *buf)
1671{
1672 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1673 struct uvesafb_par *par = info->par;
1674
1675 if (par->vbe_ib.oem_string_ptr)
1676 return snprintf(buf, PAGE_SIZE, "%s\n",
1677 (char *)(&par->vbe_ib) + par->vbe_ib.oem_string_ptr);
1678 else
1679 return 0;
1680}
1681
1682static DEVICE_ATTR(oem_string, S_IRUGO, uvesafb_show_oem_string, NULL);
1683
1684static ssize_t uvesafb_show_nocrtc(struct device *dev,
1685 struct device_attribute *attr, char *buf)
1686{
1687 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1688 struct uvesafb_par *par = info->par;
1689
1690 return snprintf(buf, PAGE_SIZE, "%d\n", par->nocrtc);
1691}
1692
1693static ssize_t uvesafb_store_nocrtc(struct device *dev,
1694 struct device_attribute *attr, const char *buf, size_t count)
1695{
1696 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1697 struct uvesafb_par *par = info->par;
1698
1699 if (count > 0) {
1700 if (buf[0] == '0')
1701 par->nocrtc = 0;
1702 else
1703 par->nocrtc = 1;
1704 }
1705 return count;
1706}
1707
1708static DEVICE_ATTR(nocrtc, S_IRUGO | S_IWUSR, uvesafb_show_nocrtc,
1709 uvesafb_store_nocrtc);
1710
1711static struct attribute *uvesafb_dev_attrs[] = {
1712 &dev_attr_vbe_version.attr,
1713 &dev_attr_vbe_modes.attr,
1714 &dev_attr_oem_vendor.attr,
1715 &dev_attr_oem_product_name.attr,
1716 &dev_attr_oem_product_rev.attr,
1717 &dev_attr_oem_string.attr,
1718 &dev_attr_nocrtc.attr,
1719 NULL,
1720};
1721
1722static struct attribute_group uvesafb_dev_attgrp = {
1723 .name = NULL,
1724 .attrs = uvesafb_dev_attrs,
1725};
1726
1727static int __devinit uvesafb_probe(struct platform_device *dev)
1728{
1729 struct fb_info *info;
1730 struct vbe_mode_ib *mode = NULL;
1731 struct uvesafb_par *par;
1732 int err = 0, i;
1733
1734 info = framebuffer_alloc(sizeof(*par) + sizeof(u32) * 256, &dev->dev);
1735 if (!info)
1736 return -ENOMEM;
1737
1738 par = info->par;
1739
1740 err = uvesafb_vbe_init(info);
1741 if (err) {
1742 printk(KERN_ERR "uvesafb: vbe_init() failed with %d\n", err);
1743 goto out;
1744 }
1745
1746 info->fbops = &uvesafb_ops;
1747
1748 i = uvesafb_vbe_init_mode(info);
1749 if (i < 0) {
1750 err = -EINVAL;
1751 goto out;
1752 } else {
1753 mode = &par->vbe_modes[i];
1754 }
1755
1756 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
1757 err = -ENXIO;
1758 goto out;
1759 }
1760
1761 uvesafb_init_info(info, mode);
1762
1763 if (!request_mem_region(info->fix.smem_start, info->fix.smem_len,
1764 "uvesafb")) {
1765 printk(KERN_ERR "uvesafb: cannot reserve video memory at "
1766 "0x%lx\n", info->fix.smem_start);
1767 err = -EIO;
1768 goto out_mode;
1769 }
1770
1771 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
1772
1773 if (!info->screen_base) {
1774 printk(KERN_ERR
1775 "uvesafb: abort, cannot ioremap 0x%x bytes of video "
1776 "memory at 0x%lx\n",
1777 info->fix.smem_len, info->fix.smem_start);
1778 err = -EIO;
1779 goto out_mem;
1780 }
1781
1782 if (!request_region(0x3c0, 32, "uvesafb")) {
1783 printk(KERN_ERR "uvesafb: request region 0x3c0-0x3e0 failed\n");
1784 err = -EIO;
1785 goto out_unmap;
1786 }
1787
1788 uvesafb_init_mtrr(info);
1789 platform_set_drvdata(dev, info);
1790
1791 if (register_framebuffer(info) < 0) {
1792 printk(KERN_ERR
1793 "uvesafb: failed to register framebuffer device\n");
1794 err = -EINVAL;
1795 goto out_reg;
1796 }
1797
1798 printk(KERN_INFO "uvesafb: framebuffer at 0x%lx, mapped to 0x%p, "
1799 "using %dk, total %dk\n", info->fix.smem_start,
1800 info->screen_base, info->fix.smem_len/1024,
1801 par->vbe_ib.total_memory * 64);
1802 printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
1803 info->fix.id);
1804
1805 err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1806 if (err != 0)
1807 printk(KERN_WARNING "fb%d: failed to register attributes\n",
1808 info->node);
1809
1810 return 0;
1811
1812out_reg:
1813 release_region(0x3c0, 32);
1814out_unmap:
1815 iounmap(info->screen_base);
1816out_mem:
1817 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1818out_mode:
1819 if (!list_empty(&info->modelist))
1820 fb_destroy_modelist(&info->modelist);
1821 fb_destroy_modedb(info->monspecs.modedb);
1822 fb_dealloc_cmap(&info->cmap);
1823out:
1824 if (par->vbe_modes)
1825 kfree(par->vbe_modes);
1826
1827 framebuffer_release(info);
1828 return err;
1829}
1830
1831static int uvesafb_remove(struct platform_device *dev)
1832{
1833 struct fb_info *info = platform_get_drvdata(dev);
1834
1835 if (info) {
1836 struct uvesafb_par *par = info->par;
1837
1838 sysfs_remove_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1839 unregister_framebuffer(info);
1840 release_region(0x3c0, 32);
1841 iounmap(info->screen_base);
1842 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1843 fb_destroy_modedb(info->monspecs.modedb);
1844 fb_dealloc_cmap(&info->cmap);
1845
1846 if (par) {
1847 if (par->vbe_modes)
1848 kfree(par->vbe_modes);
1849 if (par->vbe_state_orig)
1850 kfree(par->vbe_state_orig);
1851 if (par->vbe_state_saved)
1852 kfree(par->vbe_state_saved);
1853 }
1854
1855 framebuffer_release(info);
1856 }
1857 return 0;
1858}
1859
1860static struct platform_driver uvesafb_driver = {
1861 .probe = uvesafb_probe,
1862 .remove = uvesafb_remove,
1863 .driver = {
1864 .name = "uvesafb",
1865 },
1866};
1867
1868static struct platform_device *uvesafb_device;
1869
1870#ifndef MODULE
1871static int __devinit uvesafb_setup(char *options)
1872{
1873 char *this_opt;
1874
1875 if (!options || !*options)
1876 return 0;
1877
1878 while ((this_opt = strsep(&options, ",")) != NULL) {
1879 if (!*this_opt) continue;
1880
1881 if (!strcmp(this_opt, "redraw"))
1882 ypan = 0;
1883 else if (!strcmp(this_opt, "ypan"))
1884 ypan = 1;
1885 else if (!strcmp(this_opt, "ywrap"))
1886 ypan = 2;
1887 else if (!strcmp(this_opt, "vgapal"))
1888 pmi_setpal = 0;
1889 else if (!strcmp(this_opt, "pmipal"))
1890 pmi_setpal = 1;
1891 else if (!strncmp(this_opt, "mtrr:", 5))
1892 mtrr = simple_strtoul(this_opt+5, NULL, 0);
1893 else if (!strcmp(this_opt, "nomtrr"))
1894 mtrr = 0;
1895 else if (!strcmp(this_opt, "nocrtc"))
1896 nocrtc = 1;
1897 else if (!strcmp(this_opt, "noedid"))
1898 noedid = 1;
1899 else if (!strcmp(this_opt, "noblank"))
1900 blank = 0;
1901 else if (!strncmp(this_opt, "vtotal:", 7))
1902 vram_total = simple_strtoul(this_opt + 7, NULL, 0);
1903 else if (!strncmp(this_opt, "vremap:", 7))
1904 vram_remap = simple_strtoul(this_opt + 7, NULL, 0);
1905 else if (!strncmp(this_opt, "maxhf:", 6))
1906 maxhf = simple_strtoul(this_opt + 6, NULL, 0);
1907 else if (!strncmp(this_opt, "maxvf:", 6))
1908 maxvf = simple_strtoul(this_opt + 6, NULL, 0);
1909 else if (!strncmp(this_opt, "maxclk:", 7))
1910 maxclk = simple_strtoul(this_opt + 7, NULL, 0);
1911 else if (!strncmp(this_opt, "vbemode:", 8))
1912 vbemode = simple_strtoul(this_opt + 8, NULL, 0);
1913 else if (this_opt[0] >= '0' && this_opt[0] <= '9') {
1914 mode_option = this_opt;
1915 } else {
1916 printk(KERN_WARNING
1917 "uvesafb: unrecognized option %s\n", this_opt);
1918 }
1919 }
1920
1921 return 0;
1922}
1923#endif /* !MODULE */
1924
1925static ssize_t show_v86d(struct device_driver *dev, char *buf)
1926{
1927 return snprintf(buf, PAGE_SIZE, "%s\n", v86d_path);
1928}
1929
1930static ssize_t store_v86d(struct device_driver *dev, const char *buf,
1931 size_t count)
1932{
1933 strncpy(v86d_path, buf, PATH_MAX);
1934 return count;
1935}
1936
1937static DRIVER_ATTR(v86d, S_IRUGO | S_IWUSR, show_v86d, store_v86d);
1938
1939static int __devinit uvesafb_init(void)
1940{
1941 int err;
1942
1943#ifndef MODULE
1944 char *option = NULL;
1945
1946 if (fb_get_options("uvesafb", &option))
1947 return -ENODEV;
1948 uvesafb_setup(option);
1949#endif
1950 err = cn_add_callback(&uvesafb_cn_id, "uvesafb", uvesafb_cn_callback);
1951 if (err)
1952 return err;
1953
1954 err = platform_driver_register(&uvesafb_driver);
1955
1956 if (!err) {
1957 uvesafb_device = platform_device_alloc("uvesafb", 0);
1958 if (uvesafb_device)
1959 err = platform_device_add(uvesafb_device);
1960 else
1961 err = -ENOMEM;
1962
1963 if (err) {
1964 platform_device_put(uvesafb_device);
1965 platform_driver_unregister(&uvesafb_driver);
1966 cn_del_callback(&uvesafb_cn_id);
1967 return err;
1968 }
1969
1970 err = driver_create_file(&uvesafb_driver.driver,
1971 &driver_attr_v86d);
1972 if (err) {
1973 printk(KERN_WARNING "uvesafb: failed to register "
1974 "attributes\n");
1975 err = 0;
1976 }
1977 }
1978 return err;
1979}
1980
1981module_init(uvesafb_init);
1982
1983static void __devexit uvesafb_exit(void)
1984{
1985 struct uvesafb_ktask *task;
1986
1987 if (v86d_started) {
1988 task = uvesafb_prep();
1989 if (task) {
1990 task->t.flags = TF_EXIT;
1991 uvesafb_exec(task);
1992 uvesafb_free(task);
1993 }
1994 }
1995
1996 cn_del_callback(&uvesafb_cn_id);
1997 driver_remove_file(&uvesafb_driver.driver, &driver_attr_v86d);
1998 platform_device_unregister(uvesafb_device);
1999 platform_driver_unregister(&uvesafb_driver);
2000}
2001
2002module_exit(uvesafb_exit);
2003
2004static inline int param_get_scroll(char *buffer, struct kernel_param *kp)
2005{
2006 return 0;
2007}
2008
2009static inline int param_set_scroll(const char *val, struct kernel_param *kp)
2010{
2011 ypan = 0;
2012
2013 if (!strcmp(val, "redraw"))
2014 ypan = 0;
2015 else if (!strcmp(val, "ypan"))
2016 ypan = 1;
2017 else if (!strcmp(val, "ywrap"))
2018 ypan = 2;
2019
2020 return 0;
2021}
2022
2023#define param_check_scroll(name, p) __param_check(name, p, void);
2024
2025module_param_named(scroll, ypan, scroll, 0);
2026MODULE_PARM_DESC(scroll,
2027 "Scrolling mode, set to 'redraw', ''ypan' or 'ywrap'");
2028module_param_named(vgapal, pmi_setpal, invbool, 0);
2029MODULE_PARM_DESC(vgapal, "Set palette using VGA registers");
2030module_param_named(pmipal, pmi_setpal, bool, 0);
2031MODULE_PARM_DESC(pmipal, "Set palette using PMI calls");
2032module_param(mtrr, uint, 0);
2033MODULE_PARM_DESC(mtrr,
2034 "Memory Type Range Registers setting. Use 0 to disable.");
2035module_param(blank, bool, 0);
2036MODULE_PARM_DESC(blank, "Enable hardware blanking");
2037module_param(nocrtc, bool, 0);
2038MODULE_PARM_DESC(nocrtc, "Ignore CRTC timings when setting modes");
2039module_param(noedid, bool, 0);
2040MODULE_PARM_DESC(noedid,
2041 "Ignore EDID-provided monitor limits when setting modes");
2042module_param(vram_remap, uint, 0);
2043MODULE_PARM_DESC(vram_remap, "Set amount of video memory to be used [MiB]");
2044module_param(vram_total, uint, 0);
2045MODULE_PARM_DESC(vram_total, "Set total amount of video memoery [MiB]");
2046module_param(maxclk, ushort, 0);
2047MODULE_PARM_DESC(maxclk, "Maximum pixelclock [MHz], overrides EDID data");
2048module_param(maxhf, ushort, 0);
2049MODULE_PARM_DESC(maxhf,
2050 "Maximum horizontal frequency [kHz], overrides EDID data");
2051module_param(maxvf, ushort, 0);
2052MODULE_PARM_DESC(maxvf,
2053 "Maximum vertical frequency [Hz], overrides EDID data");
2054module_param_named(mode, mode_option, charp, 0);
2055MODULE_PARM_DESC(mode,
2056 "Specify initial video mode as \"<xres>x<yres>[-<bpp>][@<refresh>]\"");
2057module_param(vbemode, ushort, 0);
2058MODULE_PARM_DESC(vbemode,
2059 "VBE mode number to set, overrides the 'mode' option");
2060module_param_string(v86d, v86d_path, PATH_MAX, 0660);
2061MODULE_PARM_DESC(v86d, "Path to the v86d userspace helper.");
2062
2063MODULE_LICENSE("GPL");
2064MODULE_AUTHOR("Michal Januszewski <spock@gentoo.org>");
2065MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards");
2066
Linux kernel - Deliverables
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