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-rw-r--r--drivers/video/fbdev/uvesafb.c2028
1 files changed, 2028 insertions, 0 deletions
diff --git a/drivers/video/fbdev/uvesafb.c b/drivers/video/fbdev/uvesafb.c
new file mode 100644
index 000000000000..509d452e8f91
--- /dev/null
+++ b/drivers/video/fbdev/uvesafb.c
@@ -0,0 +1,2028 @@
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 <linux/slab.h>
22#include <video/edid.h>
23#include <video/uvesafb.h>
24#ifdef CONFIG_X86
25#include <video/vga.h>
26#endif
27#include "edid.h"
28
29static struct cb_id uvesafb_cn_id = {
30 .idx = CN_IDX_V86D,
31 .val = CN_VAL_V86D_UVESAFB
32};
33static char v86d_path[PATH_MAX] = "/sbin/v86d";
34static char v86d_started; /* has v86d been started by uvesafb? */
35
36static struct fb_fix_screeninfo uvesafb_fix = {
37 .id = "VESA VGA",
38 .type = FB_TYPE_PACKED_PIXELS,
39 .accel = FB_ACCEL_NONE,
40 .visual = FB_VISUAL_TRUECOLOR,
41};
42
43static int mtrr = 3; /* enable mtrr by default */
44static bool blank = 1; /* enable blanking by default */
45static int ypan = 1; /* 0: scroll, 1: ypan, 2: ywrap */
46static bool pmi_setpal = true; /* use PMI for palette changes */
47static bool nocrtc; /* ignore CRTC settings */
48static bool noedid; /* don't try DDC transfers */
49static int vram_remap; /* set amt. of memory to be used */
50static int vram_total; /* set total amount of memory */
51static u16 maxclk; /* maximum pixel clock */
52static u16 maxvf; /* maximum vertical frequency */
53static u16 maxhf; /* maximum horizontal frequency */
54static u16 vbemode; /* force use of a specific VBE mode */
55static char *mode_option;
56static u8 dac_width = 6;
57
58static struct uvesafb_ktask *uvfb_tasks[UVESAFB_TASKS_MAX];
59static DEFINE_MUTEX(uvfb_lock);
60
61/*
62 * A handler for replies from userspace.
63 *
64 * Make sure each message passes consistency checks and if it does,
65 * find the kernel part of the task struct, copy the registers and
66 * the buffer contents and then complete the task.
67 */
68static void uvesafb_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp)
69{
70 struct uvesafb_task *utask;
71 struct uvesafb_ktask *task;
72
73 if (!capable(CAP_SYS_ADMIN))
74 return;
75
76 if (msg->seq >= UVESAFB_TASKS_MAX)
77 return;
78
79 mutex_lock(&uvfb_lock);
80 task = uvfb_tasks[msg->seq];
81
82 if (!task || msg->ack != task->ack) {
83 mutex_unlock(&uvfb_lock);
84 return;
85 }
86
87 utask = (struct uvesafb_task *)msg->data;
88
89 /* Sanity checks for the buffer length. */
90 if (task->t.buf_len < utask->buf_len ||
91 utask->buf_len > msg->len - sizeof(*utask)) {
92 mutex_unlock(&uvfb_lock);
93 return;
94 }
95
96 uvfb_tasks[msg->seq] = NULL;
97 mutex_unlock(&uvfb_lock);
98
99 memcpy(&task->t, utask, sizeof(*utask));
100
101 if (task->t.buf_len && task->buf)
102 memcpy(task->buf, utask + 1, task->t.buf_len);
103
104 complete(task->done);
105 return;
106}
107
108static int uvesafb_helper_start(void)
109{
110 char *envp[] = {
111 "HOME=/",
112 "PATH=/sbin:/bin",
113 NULL,
114 };
115
116 char *argv[] = {
117 v86d_path,
118 NULL,
119 };
120
121 return call_usermodehelper(v86d_path, argv, envp, UMH_WAIT_PROC);
122}
123
124/*
125 * Execute a uvesafb task.
126 *
127 * Returns 0 if the task is executed successfully.
128 *
129 * A message sent to the userspace consists of the uvesafb_task
130 * struct and (optionally) a buffer. The uvesafb_task struct is
131 * a simplified version of uvesafb_ktask (its kernel counterpart)
132 * containing only the register values, flags and the length of
133 * the buffer.
134 *
135 * Each message is assigned a sequence number (increased linearly)
136 * and a random ack number. The sequence number is used as a key
137 * for the uvfb_tasks array which holds pointers to uvesafb_ktask
138 * structs for all requests.
139 */
140static int uvesafb_exec(struct uvesafb_ktask *task)
141{
142 static int seq;
143 struct cn_msg *m;
144 int err;
145 int len = sizeof(task->t) + task->t.buf_len;
146
147 /*
148 * Check whether the message isn't longer than the maximum
149 * allowed by connector.
150 */
151 if (sizeof(*m) + len > CONNECTOR_MAX_MSG_SIZE) {
152 printk(KERN_WARNING "uvesafb: message too long (%d), "
153 "can't execute task\n", (int)(sizeof(*m) + len));
154 return -E2BIG;
155 }
156
157 m = kzalloc(sizeof(*m) + len, GFP_KERNEL);
158 if (!m)
159 return -ENOMEM;
160
161 init_completion(task->done);
162
163 memcpy(&m->id, &uvesafb_cn_id, sizeof(m->id));
164 m->seq = seq;
165 m->len = len;
166 m->ack = prandom_u32();
167
168 /* uvesafb_task structure */
169 memcpy(m + 1, &task->t, sizeof(task->t));
170
171 /* Buffer */
172 memcpy((u8 *)(m + 1) + sizeof(task->t), task->buf, task->t.buf_len);
173
174 /*
175 * Save the message ack number so that we can find the kernel
176 * part of this task when a reply is received from userspace.
177 */
178 task->ack = m->ack;
179
180 mutex_lock(&uvfb_lock);
181
182 /* If all slots are taken -- bail out. */
183 if (uvfb_tasks[seq]) {
184 mutex_unlock(&uvfb_lock);
185 err = -EBUSY;
186 goto out;
187 }
188
189 /* Save a pointer to the kernel part of the task struct. */
190 uvfb_tasks[seq] = task;
191 mutex_unlock(&uvfb_lock);
192
193 err = cn_netlink_send(m, 0, 0, GFP_KERNEL);
194 if (err == -ESRCH) {
195 /*
196 * Try to start the userspace helper if sending
197 * the request failed the first time.
198 */
199 err = uvesafb_helper_start();
200 if (err) {
201 printk(KERN_ERR "uvesafb: failed to execute %s\n",
202 v86d_path);
203 printk(KERN_ERR "uvesafb: make sure that the v86d "
204 "helper is installed and executable\n");
205 } else {
206 v86d_started = 1;
207 err = cn_netlink_send(m, 0, 0, gfp_any());
208 if (err == -ENOBUFS)
209 err = 0;
210 }
211 } else if (err == -ENOBUFS)
212 err = 0;
213
214 if (!err && !(task->t.flags & TF_EXIT))
215 err = !wait_for_completion_timeout(task->done,
216 msecs_to_jiffies(UVESAFB_TIMEOUT));
217
218 mutex_lock(&uvfb_lock);
219 uvfb_tasks[seq] = NULL;
220 mutex_unlock(&uvfb_lock);
221
222 seq++;
223 if (seq >= UVESAFB_TASKS_MAX)
224 seq = 0;
225out:
226 kfree(m);
227 return err;
228}
229
230/*
231 * Free a uvesafb_ktask struct.
232 */
233static void uvesafb_free(struct uvesafb_ktask *task)
234{
235 if (task) {
236 kfree(task->done);
237 kfree(task);
238 }
239}
240
241/*
242 * Prepare a uvesafb_ktask struct to be used again.
243 */
244static void uvesafb_reset(struct uvesafb_ktask *task)
245{
246 struct completion *cpl = task->done;
247
248 memset(task, 0, sizeof(*task));
249 task->done = cpl;
250}
251
252/*
253 * Allocate and prepare a uvesafb_ktask struct.
254 */
255static struct uvesafb_ktask *uvesafb_prep(void)
256{
257 struct uvesafb_ktask *task;
258
259 task = kzalloc(sizeof(*task), GFP_KERNEL);
260 if (task) {
261 task->done = kzalloc(sizeof(*task->done), GFP_KERNEL);
262 if (!task->done) {
263 kfree(task);
264 task = NULL;
265 }
266 }
267 return task;
268}
269
270static void uvesafb_setup_var(struct fb_var_screeninfo *var,
271 struct fb_info *info, struct vbe_mode_ib *mode)
272{
273 struct uvesafb_par *par = info->par;
274
275 var->vmode = FB_VMODE_NONINTERLACED;
276 var->sync = FB_SYNC_VERT_HIGH_ACT;
277
278 var->xres = mode->x_res;
279 var->yres = mode->y_res;
280 var->xres_virtual = mode->x_res;
281 var->yres_virtual = (par->ypan) ?
282 info->fix.smem_len / mode->bytes_per_scan_line :
283 mode->y_res;
284 var->xoffset = 0;
285 var->yoffset = 0;
286 var->bits_per_pixel = mode->bits_per_pixel;
287
288 if (var->bits_per_pixel == 15)
289 var->bits_per_pixel = 16;
290
291 if (var->bits_per_pixel > 8) {
292 var->red.offset = mode->red_off;
293 var->red.length = mode->red_len;
294 var->green.offset = mode->green_off;
295 var->green.length = mode->green_len;
296 var->blue.offset = mode->blue_off;
297 var->blue.length = mode->blue_len;
298 var->transp.offset = mode->rsvd_off;
299 var->transp.length = mode->rsvd_len;
300 } else {
301 var->red.offset = 0;
302 var->green.offset = 0;
303 var->blue.offset = 0;
304 var->transp.offset = 0;
305
306 var->red.length = 8;
307 var->green.length = 8;
308 var->blue.length = 8;
309 var->transp.length = 0;
310 }
311}
312
313static int uvesafb_vbe_find_mode(struct uvesafb_par *par,
314 int xres, int yres, int depth, unsigned char flags)
315{
316 int i, match = -1, h = 0, d = 0x7fffffff;
317
318 for (i = 0; i < par->vbe_modes_cnt; i++) {
319 h = abs(par->vbe_modes[i].x_res - xres) +
320 abs(par->vbe_modes[i].y_res - yres) +
321 abs(depth - par->vbe_modes[i].depth);
322
323 /*
324 * We have an exact match in terms of resolution
325 * and depth.
326 */
327 if (h == 0)
328 return i;
329
330 if (h < d || (h == d && par->vbe_modes[i].depth > depth)) {
331 d = h;
332 match = i;
333 }
334 }
335 i = 1;
336
337 if (flags & UVESAFB_EXACT_DEPTH &&
338 par->vbe_modes[match].depth != depth)
339 i = 0;
340
341 if (flags & UVESAFB_EXACT_RES && d > 24)
342 i = 0;
343
344 if (i != 0)
345 return match;
346 else
347 return -1;
348}
349
350static u8 *uvesafb_vbe_state_save(struct uvesafb_par *par)
351{
352 struct uvesafb_ktask *task;
353 u8 *state;
354 int err;
355
356 if (!par->vbe_state_size)
357 return NULL;
358
359 state = kmalloc(par->vbe_state_size, GFP_KERNEL);
360 if (!state)
361 return ERR_PTR(-ENOMEM);
362
363 task = uvesafb_prep();
364 if (!task) {
365 kfree(state);
366 return NULL;
367 }
368
369 task->t.regs.eax = 0x4f04;
370 task->t.regs.ecx = 0x000f;
371 task->t.regs.edx = 0x0001;
372 task->t.flags = TF_BUF_RET | TF_BUF_ESBX;
373 task->t.buf_len = par->vbe_state_size;
374 task->buf = state;
375 err = uvesafb_exec(task);
376
377 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
378 printk(KERN_WARNING "uvesafb: VBE get state call "
379 "failed (eax=0x%x, err=%d)\n",
380 task->t.regs.eax, err);
381 kfree(state);
382 state = NULL;
383 }
384
385 uvesafb_free(task);
386 return state;
387}
388
389static void uvesafb_vbe_state_restore(struct uvesafb_par *par, u8 *state_buf)
390{
391 struct uvesafb_ktask *task;
392 int err;
393
394 if (!state_buf)
395 return;
396
397 task = uvesafb_prep();
398 if (!task)
399 return;
400
401 task->t.regs.eax = 0x4f04;
402 task->t.regs.ecx = 0x000f;
403 task->t.regs.edx = 0x0002;
404 task->t.buf_len = par->vbe_state_size;
405 task->t.flags = TF_BUF_ESBX;
406 task->buf = state_buf;
407
408 err = uvesafb_exec(task);
409 if (err || (task->t.regs.eax & 0xffff) != 0x004f)
410 printk(KERN_WARNING "uvesafb: VBE state restore call "
411 "failed (eax=0x%x, err=%d)\n",
412 task->t.regs.eax, err);
413
414 uvesafb_free(task);
415}
416
417static int uvesafb_vbe_getinfo(struct uvesafb_ktask *task,
418 struct uvesafb_par *par)
419{
420 int err;
421
422 task->t.regs.eax = 0x4f00;
423 task->t.flags = TF_VBEIB;
424 task->t.buf_len = sizeof(struct vbe_ib);
425 task->buf = &par->vbe_ib;
426 strncpy(par->vbe_ib.vbe_signature, "VBE2", 4);
427
428 err = uvesafb_exec(task);
429 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
430 printk(KERN_ERR "uvesafb: Getting VBE info block failed "
431 "(eax=0x%x, err=%d)\n", (u32)task->t.regs.eax,
432 err);
433 return -EINVAL;
434 }
435
436 if (par->vbe_ib.vbe_version < 0x0200) {
437 printk(KERN_ERR "uvesafb: Sorry, pre-VBE 2.0 cards are "
438 "not supported.\n");
439 return -EINVAL;
440 }
441
442 if (!par->vbe_ib.mode_list_ptr) {
443 printk(KERN_ERR "uvesafb: Missing mode list!\n");
444 return -EINVAL;
445 }
446
447 printk(KERN_INFO "uvesafb: ");
448
449 /*
450 * Convert string pointers and the mode list pointer into
451 * usable addresses. Print informational messages about the
452 * video adapter and its vendor.
453 */
454 if (par->vbe_ib.oem_vendor_name_ptr)
455 printk("%s, ",
456 ((char *)task->buf) + par->vbe_ib.oem_vendor_name_ptr);
457
458 if (par->vbe_ib.oem_product_name_ptr)
459 printk("%s, ",
460 ((char *)task->buf) + par->vbe_ib.oem_product_name_ptr);
461
462 if (par->vbe_ib.oem_product_rev_ptr)
463 printk("%s, ",
464 ((char *)task->buf) + par->vbe_ib.oem_product_rev_ptr);
465
466 if (par->vbe_ib.oem_string_ptr)
467 printk("OEM: %s, ",
468 ((char *)task->buf) + par->vbe_ib.oem_string_ptr);
469
470 printk("VBE v%d.%d\n", ((par->vbe_ib.vbe_version & 0xff00) >> 8),
471 par->vbe_ib.vbe_version & 0xff);
472
473 return 0;
474}
475
476static int uvesafb_vbe_getmodes(struct uvesafb_ktask *task,
477 struct uvesafb_par *par)
478{
479 int off = 0, err;
480 u16 *mode;
481
482 par->vbe_modes_cnt = 0;
483
484 /* Count available modes. */
485 mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
486 while (*mode != 0xffff) {
487 par->vbe_modes_cnt++;
488 mode++;
489 }
490
491 par->vbe_modes = kzalloc(sizeof(struct vbe_mode_ib) *
492 par->vbe_modes_cnt, GFP_KERNEL);
493 if (!par->vbe_modes)
494 return -ENOMEM;
495
496 /* Get info about all available modes. */
497 mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
498 while (*mode != 0xffff) {
499 struct vbe_mode_ib *mib;
500
501 uvesafb_reset(task);
502 task->t.regs.eax = 0x4f01;
503 task->t.regs.ecx = (u32) *mode;
504 task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
505 task->t.buf_len = sizeof(struct vbe_mode_ib);
506 task->buf = par->vbe_modes + off;
507
508 err = uvesafb_exec(task);
509 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
510 printk(KERN_WARNING "uvesafb: Getting mode info block "
511 "for mode 0x%x failed (eax=0x%x, err=%d)\n",
512 *mode, (u32)task->t.regs.eax, err);
513 mode++;
514 par->vbe_modes_cnt--;
515 continue;
516 }
517
518 mib = task->buf;
519 mib->mode_id = *mode;
520
521 /*
522 * We only want modes that are supported with the current
523 * hardware configuration, color, graphics and that have
524 * support for the LFB.
525 */
526 if ((mib->mode_attr & VBE_MODE_MASK) == VBE_MODE_MASK &&
527 mib->bits_per_pixel >= 8)
528 off++;
529 else
530 par->vbe_modes_cnt--;
531
532 mode++;
533 mib->depth = mib->red_len + mib->green_len + mib->blue_len;
534
535 /*
536 * Handle 8bpp modes and modes with broken color component
537 * lengths.
538 */
539 if (mib->depth == 0 || (mib->depth == 24 &&
540 mib->bits_per_pixel == 32))
541 mib->depth = mib->bits_per_pixel;
542 }
543
544 if (par->vbe_modes_cnt > 0)
545 return 0;
546 else
547 return -EINVAL;
548}
549
550/*
551 * The Protected Mode Interface is 32-bit x86 code, so we only run it on
552 * x86 and not x86_64.
553 */
554#ifdef CONFIG_X86_32
555static int uvesafb_vbe_getpmi(struct uvesafb_ktask *task,
556 struct uvesafb_par *par)
557{
558 int i, err;
559
560 uvesafb_reset(task);
561 task->t.regs.eax = 0x4f0a;
562 task->t.regs.ebx = 0x0;
563 err = uvesafb_exec(task);
564
565 if ((task->t.regs.eax & 0xffff) != 0x4f || task->t.regs.es < 0xc000) {
566 par->pmi_setpal = par->ypan = 0;
567 } else {
568 par->pmi_base = (u16 *)phys_to_virt(((u32)task->t.regs.es << 4)
569 + task->t.regs.edi);
570 par->pmi_start = (u8 *)par->pmi_base + par->pmi_base[1];
571 par->pmi_pal = (u8 *)par->pmi_base + par->pmi_base[2];
572 printk(KERN_INFO "uvesafb: protected mode interface info at "
573 "%04x:%04x\n",
574 (u16)task->t.regs.es, (u16)task->t.regs.edi);
575 printk(KERN_INFO "uvesafb: pmi: set display start = %p, "
576 "set palette = %p\n", par->pmi_start,
577 par->pmi_pal);
578
579 if (par->pmi_base[3]) {
580 printk(KERN_INFO "uvesafb: pmi: ports = ");
581 for (i = par->pmi_base[3]/2;
582 par->pmi_base[i] != 0xffff; i++)
583 printk("%x ", par->pmi_base[i]);
584 printk("\n");
585
586 if (par->pmi_base[i] != 0xffff) {
587 printk(KERN_INFO "uvesafb: can't handle memory"
588 " requests, pmi disabled\n");
589 par->ypan = par->pmi_setpal = 0;
590 }
591 }
592 }
593 return 0;
594}
595#endif /* CONFIG_X86_32 */
596
597/*
598 * Check whether a video mode is supported by the Video BIOS and is
599 * compatible with the monitor limits.
600 */
601static int uvesafb_is_valid_mode(struct fb_videomode *mode,
602 struct fb_info *info)
603{
604 if (info->monspecs.gtf) {
605 fb_videomode_to_var(&info->var, mode);
606 if (fb_validate_mode(&info->var, info))
607 return 0;
608 }
609
610 if (uvesafb_vbe_find_mode(info->par, mode->xres, mode->yres, 8,
611 UVESAFB_EXACT_RES) == -1)
612 return 0;
613
614 return 1;
615}
616
617static int uvesafb_vbe_getedid(struct uvesafb_ktask *task, struct fb_info *info)
618{
619 struct uvesafb_par *par = info->par;
620 int err = 0;
621
622 if (noedid || par->vbe_ib.vbe_version < 0x0300)
623 return -EINVAL;
624
625 task->t.regs.eax = 0x4f15;
626 task->t.regs.ebx = 0;
627 task->t.regs.ecx = 0;
628 task->t.buf_len = 0;
629 task->t.flags = 0;
630
631 err = uvesafb_exec(task);
632
633 if ((task->t.regs.eax & 0xffff) != 0x004f || err)
634 return -EINVAL;
635
636 if ((task->t.regs.ebx & 0x3) == 3) {
637 printk(KERN_INFO "uvesafb: VBIOS/hardware supports both "
638 "DDC1 and DDC2 transfers\n");
639 } else if ((task->t.regs.ebx & 0x3) == 2) {
640 printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC2 "
641 "transfers\n");
642 } else if ((task->t.regs.ebx & 0x3) == 1) {
643 printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC1 "
644 "transfers\n");
645 } else {
646 printk(KERN_INFO "uvesafb: VBIOS/hardware doesn't support "
647 "DDC transfers\n");
648 return -EINVAL;
649 }
650
651 task->t.regs.eax = 0x4f15;
652 task->t.regs.ebx = 1;
653 task->t.regs.ecx = task->t.regs.edx = 0;
654 task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
655 task->t.buf_len = EDID_LENGTH;
656 task->buf = kzalloc(EDID_LENGTH, GFP_KERNEL);
657 if (!task->buf)
658 return -ENOMEM;
659
660 err = uvesafb_exec(task);
661
662 if ((task->t.regs.eax & 0xffff) == 0x004f && !err) {
663 fb_edid_to_monspecs(task->buf, &info->monspecs);
664
665 if (info->monspecs.vfmax && info->monspecs.hfmax) {
666 /*
667 * If the maximum pixel clock wasn't specified in
668 * the EDID block, set it to 300 MHz.
669 */
670 if (info->monspecs.dclkmax == 0)
671 info->monspecs.dclkmax = 300 * 1000000;
672 info->monspecs.gtf = 1;
673 }
674 } else {
675 err = -EINVAL;
676 }
677
678 kfree(task->buf);
679 return err;
680}
681
682static void uvesafb_vbe_getmonspecs(struct uvesafb_ktask *task,
683 struct fb_info *info)
684{
685 struct uvesafb_par *par = info->par;
686 int i;
687
688 memset(&info->monspecs, 0, sizeof(info->monspecs));
689
690 /*
691 * If we don't get all necessary data from the EDID block,
692 * mark it as incompatible with the GTF and set nocrtc so
693 * that we always use the default BIOS refresh rate.
694 */
695 if (uvesafb_vbe_getedid(task, info)) {
696 info->monspecs.gtf = 0;
697 par->nocrtc = 1;
698 }
699
700 /* Kernel command line overrides. */
701 if (maxclk)
702 info->monspecs.dclkmax = maxclk * 1000000;
703 if (maxvf)
704 info->monspecs.vfmax = maxvf;
705 if (maxhf)
706 info->monspecs.hfmax = maxhf * 1000;
707
708 /*
709 * In case DDC transfers are not supported, the user can provide
710 * monitor limits manually. Lower limits are set to "safe" values.
711 */
712 if (info->monspecs.gtf == 0 && maxclk && maxvf && maxhf) {
713 info->monspecs.dclkmin = 0;
714 info->monspecs.vfmin = 60;
715 info->monspecs.hfmin = 29000;
716 info->monspecs.gtf = 1;
717 par->nocrtc = 0;
718 }
719
720 if (info->monspecs.gtf)
721 printk(KERN_INFO
722 "uvesafb: monitor limits: vf = %d Hz, hf = %d kHz, "
723 "clk = %d MHz\n", info->monspecs.vfmax,
724 (int)(info->monspecs.hfmax / 1000),
725 (int)(info->monspecs.dclkmax / 1000000));
726 else
727 printk(KERN_INFO "uvesafb: no monitor limits have been set, "
728 "default refresh rate will be used\n");
729
730 /* Add VBE modes to the modelist. */
731 for (i = 0; i < par->vbe_modes_cnt; i++) {
732 struct fb_var_screeninfo var;
733 struct vbe_mode_ib *mode;
734 struct fb_videomode vmode;
735
736 mode = &par->vbe_modes[i];
737 memset(&var, 0, sizeof(var));
738
739 var.xres = mode->x_res;
740 var.yres = mode->y_res;
741
742 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, &var, info);
743 fb_var_to_videomode(&vmode, &var);
744 fb_add_videomode(&vmode, &info->modelist);
745 }
746
747 /* Add valid VESA modes to our modelist. */
748 for (i = 0; i < VESA_MODEDB_SIZE; i++) {
749 if (uvesafb_is_valid_mode((struct fb_videomode *)
750 &vesa_modes[i], info))
751 fb_add_videomode(&vesa_modes[i], &info->modelist);
752 }
753
754 for (i = 0; i < info->monspecs.modedb_len; i++) {
755 if (uvesafb_is_valid_mode(&info->monspecs.modedb[i], info))
756 fb_add_videomode(&info->monspecs.modedb[i],
757 &info->modelist);
758 }
759
760 return;
761}
762
763static void uvesafb_vbe_getstatesize(struct uvesafb_ktask *task,
764 struct uvesafb_par *par)
765{
766 int err;
767
768 uvesafb_reset(task);
769
770 /*
771 * Get the VBE state buffer size. We want all available
772 * hardware state data (CL = 0x0f).
773 */
774 task->t.regs.eax = 0x4f04;
775 task->t.regs.ecx = 0x000f;
776 task->t.regs.edx = 0x0000;
777 task->t.flags = 0;
778
779 err = uvesafb_exec(task);
780
781 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
782 printk(KERN_WARNING "uvesafb: VBE state buffer size "
783 "cannot be determined (eax=0x%x, err=%d)\n",
784 task->t.regs.eax, err);
785 par->vbe_state_size = 0;
786 return;
787 }
788
789 par->vbe_state_size = 64 * (task->t.regs.ebx & 0xffff);
790}
791
792static int uvesafb_vbe_init(struct fb_info *info)
793{
794 struct uvesafb_ktask *task = NULL;
795 struct uvesafb_par *par = info->par;
796 int err;
797
798 task = uvesafb_prep();
799 if (!task)
800 return -ENOMEM;
801
802 err = uvesafb_vbe_getinfo(task, par);
803 if (err)
804 goto out;
805
806 err = uvesafb_vbe_getmodes(task, par);
807 if (err)
808 goto out;
809
810 par->nocrtc = nocrtc;
811#ifdef CONFIG_X86_32
812 par->pmi_setpal = pmi_setpal;
813 par->ypan = ypan;
814
815 if (par->pmi_setpal || par->ypan) {
816 if (__supported_pte_mask & _PAGE_NX) {
817 par->pmi_setpal = par->ypan = 0;
818 printk(KERN_WARNING "uvesafb: NX protection is active, "
819 "better not use the PMI.\n");
820 } else {
821 uvesafb_vbe_getpmi(task, par);
822 }
823 }
824#else
825 /* The protected mode interface is not available on non-x86. */
826 par->pmi_setpal = par->ypan = 0;
827#endif
828
829 INIT_LIST_HEAD(&info->modelist);
830 uvesafb_vbe_getmonspecs(task, info);
831 uvesafb_vbe_getstatesize(task, par);
832
833out: uvesafb_free(task);
834 return err;
835}
836
837static int uvesafb_vbe_init_mode(struct fb_info *info)
838{
839 struct list_head *pos;
840 struct fb_modelist *modelist;
841 struct fb_videomode *mode;
842 struct uvesafb_par *par = info->par;
843 int i, modeid;
844
845 /* Has the user requested a specific VESA mode? */
846 if (vbemode) {
847 for (i = 0; i < par->vbe_modes_cnt; i++) {
848 if (par->vbe_modes[i].mode_id == vbemode) {
849 modeid = i;
850 uvesafb_setup_var(&info->var, info,
851 &par->vbe_modes[modeid]);
852 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
853 &info->var, info);
854 /*
855 * With pixclock set to 0, the default BIOS
856 * timings will be used in set_par().
857 */
858 info->var.pixclock = 0;
859 goto gotmode;
860 }
861 }
862 printk(KERN_INFO "uvesafb: requested VBE mode 0x%x is "
863 "unavailable\n", vbemode);
864 vbemode = 0;
865 }
866
867 /* Count the modes in the modelist */
868 i = 0;
869 list_for_each(pos, &info->modelist)
870 i++;
871
872 /*
873 * Convert the modelist into a modedb so that we can use it with
874 * fb_find_mode().
875 */
876 mode = kzalloc(i * sizeof(*mode), GFP_KERNEL);
877 if (mode) {
878 i = 0;
879 list_for_each(pos, &info->modelist) {
880 modelist = list_entry(pos, struct fb_modelist, list);
881 mode[i] = modelist->mode;
882 i++;
883 }
884
885 if (!mode_option)
886 mode_option = UVESAFB_DEFAULT_MODE;
887
888 i = fb_find_mode(&info->var, info, mode_option, mode, i,
889 NULL, 8);
890
891 kfree(mode);
892 }
893
894 /* fb_find_mode() failed */
895 if (i == 0) {
896 info->var.xres = 640;
897 info->var.yres = 480;
898 mode = (struct fb_videomode *)
899 fb_find_best_mode(&info->var, &info->modelist);
900
901 if (mode) {
902 fb_videomode_to_var(&info->var, mode);
903 } else {
904 modeid = par->vbe_modes[0].mode_id;
905 uvesafb_setup_var(&info->var, info,
906 &par->vbe_modes[modeid]);
907 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
908 &info->var, info);
909
910 goto gotmode;
911 }
912 }
913
914 /* Look for a matching VBE mode. */
915 modeid = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres,
916 info->var.bits_per_pixel, UVESAFB_EXACT_RES);
917
918 if (modeid == -1)
919 return -EINVAL;
920
921 uvesafb_setup_var(&info->var, info, &par->vbe_modes[modeid]);
922
923gotmode:
924 /*
925 * If we are not VBE3.0+ compliant, we're done -- the BIOS will
926 * ignore our timings anyway.
927 */
928 if (par->vbe_ib.vbe_version < 0x0300 || par->nocrtc)
929 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
930 &info->var, info);
931
932 return modeid;
933}
934
935static int uvesafb_setpalette(struct uvesafb_pal_entry *entries, int count,
936 int start, struct fb_info *info)
937{
938 struct uvesafb_ktask *task;
939#ifdef CONFIG_X86
940 struct uvesafb_par *par = info->par;
941 int i = par->mode_idx;
942#endif
943 int err = 0;
944
945 /*
946 * We support palette modifications for 8 bpp modes only, so
947 * there can never be more than 256 entries.
948 */
949 if (start + count > 256)
950 return -EINVAL;
951
952#ifdef CONFIG_X86
953 /* Use VGA registers if mode is VGA-compatible. */
954 if (i >= 0 && i < par->vbe_modes_cnt &&
955 par->vbe_modes[i].mode_attr & VBE_MODE_VGACOMPAT) {
956 for (i = 0; i < count; i++) {
957 outb_p(start + i, dac_reg);
958 outb_p(entries[i].red, dac_val);
959 outb_p(entries[i].green, dac_val);
960 outb_p(entries[i].blue, dac_val);
961 }
962 }
963#ifdef CONFIG_X86_32
964 else if (par->pmi_setpal) {
965 __asm__ __volatile__(
966 "call *(%%esi)"
967 : /* no return value */
968 : "a" (0x4f09), /* EAX */
969 "b" (0), /* EBX */
970 "c" (count), /* ECX */
971 "d" (start), /* EDX */
972 "D" (entries), /* EDI */
973 "S" (&par->pmi_pal)); /* ESI */
974 }
975#endif /* CONFIG_X86_32 */
976 else
977#endif /* CONFIG_X86 */
978 {
979 task = uvesafb_prep();
980 if (!task)
981 return -ENOMEM;
982
983 task->t.regs.eax = 0x4f09;
984 task->t.regs.ebx = 0x0;
985 task->t.regs.ecx = count;
986 task->t.regs.edx = start;
987 task->t.flags = TF_BUF_ESDI;
988 task->t.buf_len = sizeof(struct uvesafb_pal_entry) * count;
989 task->buf = entries;
990
991 err = uvesafb_exec(task);
992 if ((task->t.regs.eax & 0xffff) != 0x004f)
993 err = 1;
994
995 uvesafb_free(task);
996 }
997 return err;
998}
999
1000static int uvesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
1001 unsigned blue, unsigned transp,
1002 struct fb_info *info)
1003{
1004 struct uvesafb_pal_entry entry;
1005 int shift = 16 - dac_width;
1006 int err = 0;
1007
1008 if (regno >= info->cmap.len)
1009 return -EINVAL;
1010
1011 if (info->var.bits_per_pixel == 8) {
1012 entry.red = red >> shift;
1013 entry.green = green >> shift;
1014 entry.blue = blue >> shift;
1015 entry.pad = 0;
1016
1017 err = uvesafb_setpalette(&entry, 1, regno, info);
1018 } else if (regno < 16) {
1019 switch (info->var.bits_per_pixel) {
1020 case 16:
1021 if (info->var.red.offset == 10) {
1022 /* 1:5:5:5 */
1023 ((u32 *) (info->pseudo_palette))[regno] =
1024 ((red & 0xf800) >> 1) |
1025 ((green & 0xf800) >> 6) |
1026 ((blue & 0xf800) >> 11);
1027 } else {
1028 /* 0:5:6:5 */
1029 ((u32 *) (info->pseudo_palette))[regno] =
1030 ((red & 0xf800) ) |
1031 ((green & 0xfc00) >> 5) |
1032 ((blue & 0xf800) >> 11);
1033 }
1034 break;
1035
1036 case 24:
1037 case 32:
1038 red >>= 8;
1039 green >>= 8;
1040 blue >>= 8;
1041 ((u32 *)(info->pseudo_palette))[regno] =
1042 (red << info->var.red.offset) |
1043 (green << info->var.green.offset) |
1044 (blue << info->var.blue.offset);
1045 break;
1046 }
1047 }
1048 return err;
1049}
1050
1051static int uvesafb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
1052{
1053 struct uvesafb_pal_entry *entries;
1054 int shift = 16 - dac_width;
1055 int i, err = 0;
1056
1057 if (info->var.bits_per_pixel == 8) {
1058 if (cmap->start + cmap->len > info->cmap.start +
1059 info->cmap.len || cmap->start < info->cmap.start)
1060 return -EINVAL;
1061
1062 entries = kmalloc(sizeof(*entries) * cmap->len, GFP_KERNEL);
1063 if (!entries)
1064 return -ENOMEM;
1065
1066 for (i = 0; i < cmap->len; i++) {
1067 entries[i].red = cmap->red[i] >> shift;
1068 entries[i].green = cmap->green[i] >> shift;
1069 entries[i].blue = cmap->blue[i] >> shift;
1070 entries[i].pad = 0;
1071 }
1072 err = uvesafb_setpalette(entries, cmap->len, cmap->start, info);
1073 kfree(entries);
1074 } else {
1075 /*
1076 * For modes with bpp > 8, we only set the pseudo palette in
1077 * the fb_info struct. We rely on uvesafb_setcolreg to do all
1078 * sanity checking.
1079 */
1080 for (i = 0; i < cmap->len; i++) {
1081 err |= uvesafb_setcolreg(cmap->start + i, cmap->red[i],
1082 cmap->green[i], cmap->blue[i],
1083 0, info);
1084 }
1085 }
1086 return err;
1087}
1088
1089static int uvesafb_pan_display(struct fb_var_screeninfo *var,
1090 struct fb_info *info)
1091{
1092#ifdef CONFIG_X86_32
1093 int offset;
1094 struct uvesafb_par *par = info->par;
1095
1096 offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;
1097
1098 /*
1099 * It turns out it's not the best idea to do panning via vm86,
1100 * so we only allow it if we have a PMI.
1101 */
1102 if (par->pmi_start) {
1103 __asm__ __volatile__(
1104 "call *(%%edi)"
1105 : /* no return value */
1106 : "a" (0x4f07), /* EAX */
1107 "b" (0), /* EBX */
1108 "c" (offset), /* ECX */
1109 "d" (offset >> 16), /* EDX */
1110 "D" (&par->pmi_start)); /* EDI */
1111 }
1112#endif
1113 return 0;
1114}
1115
1116static int uvesafb_blank(int blank, struct fb_info *info)
1117{
1118 struct uvesafb_ktask *task;
1119 int err = 1;
1120#ifdef CONFIG_X86
1121 struct uvesafb_par *par = info->par;
1122
1123 if (par->vbe_ib.capabilities & VBE_CAP_VGACOMPAT) {
1124 int loop = 10000;
1125 u8 seq = 0, crtc17 = 0;
1126
1127 if (blank == FB_BLANK_POWERDOWN) {
1128 seq = 0x20;
1129 crtc17 = 0x00;
1130 err = 0;
1131 } else {
1132 seq = 0x00;
1133 crtc17 = 0x80;
1134 err = (blank == FB_BLANK_UNBLANK) ? 0 : -EINVAL;
1135 }
1136
1137 vga_wseq(NULL, 0x00, 0x01);
1138 seq |= vga_rseq(NULL, 0x01) & ~0x20;
1139 vga_wseq(NULL, 0x00, seq);
1140
1141 crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80;
1142 while (loop--);
1143 vga_wcrt(NULL, 0x17, crtc17);
1144 vga_wseq(NULL, 0x00, 0x03);
1145 } else
1146#endif /* CONFIG_X86 */
1147 {
1148 task = uvesafb_prep();
1149 if (!task)
1150 return -ENOMEM;
1151
1152 task->t.regs.eax = 0x4f10;
1153 switch (blank) {
1154 case FB_BLANK_UNBLANK:
1155 task->t.regs.ebx = 0x0001;
1156 break;
1157 case FB_BLANK_NORMAL:
1158 task->t.regs.ebx = 0x0101; /* standby */
1159 break;
1160 case FB_BLANK_POWERDOWN:
1161 task->t.regs.ebx = 0x0401; /* powerdown */
1162 break;
1163 default:
1164 goto out;
1165 }
1166
1167 err = uvesafb_exec(task);
1168 if (err || (task->t.regs.eax & 0xffff) != 0x004f)
1169 err = 1;
1170out: uvesafb_free(task);
1171 }
1172 return err;
1173}
1174
1175static int uvesafb_open(struct fb_info *info, int user)
1176{
1177 struct uvesafb_par *par = info->par;
1178 int cnt = atomic_read(&par->ref_count);
1179 u8 *buf = NULL;
1180
1181 if (!cnt && par->vbe_state_size) {
1182 buf = uvesafb_vbe_state_save(par);
1183 if (IS_ERR(buf)) {
1184 printk(KERN_WARNING "uvesafb: save hardware state"
1185 "failed, error code is %ld!\n", PTR_ERR(buf));
1186 } else {
1187 par->vbe_state_orig = buf;
1188 }
1189 }
1190
1191 atomic_inc(&par->ref_count);
1192 return 0;
1193}
1194
1195static int uvesafb_release(struct fb_info *info, int user)
1196{
1197 struct uvesafb_ktask *task = NULL;
1198 struct uvesafb_par *par = info->par;
1199 int cnt = atomic_read(&par->ref_count);
1200
1201 if (!cnt)
1202 return -EINVAL;
1203
1204 if (cnt != 1)
1205 goto out;
1206
1207 task = uvesafb_prep();
1208 if (!task)
1209 goto out;
1210
1211 /* First, try to set the standard 80x25 text mode. */
1212 task->t.regs.eax = 0x0003;
1213 uvesafb_exec(task);
1214
1215 /*
1216 * Now try to restore whatever hardware state we might have
1217 * saved when the fb device was first opened.
1218 */
1219 uvesafb_vbe_state_restore(par, par->vbe_state_orig);
1220out:
1221 atomic_dec(&par->ref_count);
1222 if (task)
1223 uvesafb_free(task);
1224 return 0;
1225}
1226
1227static int uvesafb_set_par(struct fb_info *info)
1228{
1229 struct uvesafb_par *par = info->par;
1230 struct uvesafb_ktask *task = NULL;
1231 struct vbe_crtc_ib *crtc = NULL;
1232 struct vbe_mode_ib *mode = NULL;
1233 int i, err = 0, depth = info->var.bits_per_pixel;
1234
1235 if (depth > 8 && depth != 32)
1236 depth = info->var.red.length + info->var.green.length +
1237 info->var.blue.length;
1238
1239 i = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, depth,
1240 UVESAFB_EXACT_RES | UVESAFB_EXACT_DEPTH);
1241 if (i >= 0)
1242 mode = &par->vbe_modes[i];
1243 else
1244 return -EINVAL;
1245
1246 task = uvesafb_prep();
1247 if (!task)
1248 return -ENOMEM;
1249setmode:
1250 task->t.regs.eax = 0x4f02;
1251 task->t.regs.ebx = mode->mode_id | 0x4000; /* use LFB */
1252
1253 if (par->vbe_ib.vbe_version >= 0x0300 && !par->nocrtc &&
1254 info->var.pixclock != 0) {
1255 task->t.regs.ebx |= 0x0800; /* use CRTC data */
1256 task->t.flags = TF_BUF_ESDI;
1257 crtc = kzalloc(sizeof(struct vbe_crtc_ib), GFP_KERNEL);
1258 if (!crtc) {
1259 err = -ENOMEM;
1260 goto out;
1261 }
1262 crtc->horiz_start = info->var.xres + info->var.right_margin;
1263 crtc->horiz_end = crtc->horiz_start + info->var.hsync_len;
1264 crtc->horiz_total = crtc->horiz_end + info->var.left_margin;
1265
1266 crtc->vert_start = info->var.yres + info->var.lower_margin;
1267 crtc->vert_end = crtc->vert_start + info->var.vsync_len;
1268 crtc->vert_total = crtc->vert_end + info->var.upper_margin;
1269
1270 crtc->pixel_clock = PICOS2KHZ(info->var.pixclock) * 1000;
1271 crtc->refresh_rate = (u16)(100 * (crtc->pixel_clock /
1272 (crtc->vert_total * crtc->horiz_total)));
1273
1274 if (info->var.vmode & FB_VMODE_DOUBLE)
1275 crtc->flags |= 0x1;
1276 if (info->var.vmode & FB_VMODE_INTERLACED)
1277 crtc->flags |= 0x2;
1278 if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
1279 crtc->flags |= 0x4;
1280 if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
1281 crtc->flags |= 0x8;
1282 memcpy(&par->crtc, crtc, sizeof(*crtc));
1283 } else {
1284 memset(&par->crtc, 0, sizeof(*crtc));
1285 }
1286
1287 task->t.buf_len = sizeof(struct vbe_crtc_ib);
1288 task->buf = &par->crtc;
1289
1290 err = uvesafb_exec(task);
1291 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
1292 /*
1293 * The mode switch might have failed because we tried to
1294 * use our own timings. Try again with the default timings.
1295 */
1296 if (crtc != NULL) {
1297 printk(KERN_WARNING "uvesafb: mode switch failed "
1298 "(eax=0x%x, err=%d). Trying again with "
1299 "default timings.\n", task->t.regs.eax, err);
1300 uvesafb_reset(task);
1301 kfree(crtc);
1302 crtc = NULL;
1303 info->var.pixclock = 0;
1304 goto setmode;
1305 } else {
1306 printk(KERN_ERR "uvesafb: mode switch failed (eax="
1307 "0x%x, err=%d)\n", task->t.regs.eax, err);
1308 err = -EINVAL;
1309 goto out;
1310 }
1311 }
1312 par->mode_idx = i;
1313
1314 /* For 8bpp modes, always try to set the DAC to 8 bits. */
1315 if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC &&
1316 mode->bits_per_pixel <= 8) {
1317 uvesafb_reset(task);
1318 task->t.regs.eax = 0x4f08;
1319 task->t.regs.ebx = 0x0800;
1320
1321 err = uvesafb_exec(task);
1322 if (err || (task->t.regs.eax & 0xffff) != 0x004f ||
1323 ((task->t.regs.ebx & 0xff00) >> 8) != 8) {
1324 dac_width = 6;
1325 } else {
1326 dac_width = 8;
1327 }
1328 }
1329
1330 info->fix.visual = (info->var.bits_per_pixel == 8) ?
1331 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
1332 info->fix.line_length = mode->bytes_per_scan_line;
1333
1334out:
1335 kfree(crtc);
1336 uvesafb_free(task);
1337
1338 return err;
1339}
1340
1341static void uvesafb_check_limits(struct fb_var_screeninfo *var,
1342 struct fb_info *info)
1343{
1344 const struct fb_videomode *mode;
1345 struct uvesafb_par *par = info->par;
1346
1347 /*
1348 * If pixclock is set to 0, then we're using default BIOS timings
1349 * and thus don't have to perform any checks here.
1350 */
1351 if (!var->pixclock)
1352 return;
1353
1354 if (par->vbe_ib.vbe_version < 0x0300) {
1355 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, var, info);
1356 return;
1357 }
1358
1359 if (!fb_validate_mode(var, info))
1360 return;
1361
1362 mode = fb_find_best_mode(var, &info->modelist);
1363 if (mode) {
1364 if (mode->xres == var->xres && mode->yres == var->yres &&
1365 !(mode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))) {
1366 fb_videomode_to_var(var, mode);
1367 return;
1368 }
1369 }
1370
1371 if (info->monspecs.gtf && !fb_get_mode(FB_MAXTIMINGS, 0, var, info))
1372 return;
1373 /* Use default refresh rate */
1374 var->pixclock = 0;
1375}
1376
1377static int uvesafb_check_var(struct fb_var_screeninfo *var,
1378 struct fb_info *info)
1379{
1380 struct uvesafb_par *par = info->par;
1381 struct vbe_mode_ib *mode = NULL;
1382 int match = -1;
1383 int depth = var->red.length + var->green.length + var->blue.length;
1384
1385 /*
1386 * Various apps will use bits_per_pixel to set the color depth,
1387 * which is theoretically incorrect, but which we'll try to handle
1388 * here.
1389 */
1390 if (depth == 0 || abs(depth - var->bits_per_pixel) >= 8)
1391 depth = var->bits_per_pixel;
1392
1393 match = uvesafb_vbe_find_mode(par, var->xres, var->yres, depth,
1394 UVESAFB_EXACT_RES);
1395 if (match == -1)
1396 return -EINVAL;
1397
1398 mode = &par->vbe_modes[match];
1399 uvesafb_setup_var(var, info, mode);
1400
1401 /*
1402 * Check whether we have remapped enough memory for this mode.
1403 * We might be called at an early stage, when we haven't remapped
1404 * any memory yet, in which case we simply skip the check.
1405 */
1406 if (var->yres * mode->bytes_per_scan_line > info->fix.smem_len
1407 && info->fix.smem_len)
1408 return -EINVAL;
1409
1410 if ((var->vmode & FB_VMODE_DOUBLE) &&
1411 !(par->vbe_modes[match].mode_attr & 0x100))
1412 var->vmode &= ~FB_VMODE_DOUBLE;
1413
1414 if ((var->vmode & FB_VMODE_INTERLACED) &&
1415 !(par->vbe_modes[match].mode_attr & 0x200))
1416 var->vmode &= ~FB_VMODE_INTERLACED;
1417
1418 uvesafb_check_limits(var, info);
1419
1420 var->xres_virtual = var->xres;
1421 var->yres_virtual = (par->ypan) ?
1422 info->fix.smem_len / mode->bytes_per_scan_line :
1423 var->yres;
1424 return 0;
1425}
1426
1427static struct fb_ops uvesafb_ops = {
1428 .owner = THIS_MODULE,
1429 .fb_open = uvesafb_open,
1430 .fb_release = uvesafb_release,
1431 .fb_setcolreg = uvesafb_setcolreg,
1432 .fb_setcmap = uvesafb_setcmap,
1433 .fb_pan_display = uvesafb_pan_display,
1434 .fb_blank = uvesafb_blank,
1435 .fb_fillrect = cfb_fillrect,
1436 .fb_copyarea = cfb_copyarea,
1437 .fb_imageblit = cfb_imageblit,
1438 .fb_check_var = uvesafb_check_var,
1439 .fb_set_par = uvesafb_set_par,
1440};
1441
1442static void uvesafb_init_info(struct fb_info *info, struct vbe_mode_ib *mode)
1443{
1444 unsigned int size_vmode;
1445 unsigned int size_remap;
1446 unsigned int size_total;
1447 struct uvesafb_par *par = info->par;
1448 int i, h;
1449
1450 info->pseudo_palette = ((u8 *)info->par + sizeof(struct uvesafb_par));
1451 info->fix = uvesafb_fix;
1452 info->fix.ypanstep = par->ypan ? 1 : 0;
1453 info->fix.ywrapstep = (par->ypan > 1) ? 1 : 0;
1454
1455 /* Disable blanking if the user requested so. */
1456 if (!blank)
1457 info->fbops->fb_blank = NULL;
1458
1459 /*
1460 * Find out how much IO memory is required for the mode with
1461 * the highest resolution.
1462 */
1463 size_remap = 0;
1464 for (i = 0; i < par->vbe_modes_cnt; i++) {
1465 h = par->vbe_modes[i].bytes_per_scan_line *
1466 par->vbe_modes[i].y_res;
1467 if (h > size_remap)
1468 size_remap = h;
1469 }
1470 size_remap *= 2;
1471
1472 /*
1473 * size_vmode -- that is the amount of memory needed for the
1474 * used video mode, i.e. the minimum amount of
1475 * memory we need.
1476 */
1477 size_vmode = info->var.yres * mode->bytes_per_scan_line;
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
1532static void uvesafb_init_mtrr(struct fb_info *info)
1533{
1534 struct uvesafb_par *par = info->par;
1535
1536 if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) {
1537 int temp_size = info->fix.smem_len;
1538
1539 int rc;
1540
1541 /* Find the largest power-of-two */
1542 temp_size = roundup_pow_of_two(temp_size);
1543
1544 /* Try and find a power of two to add */
1545 do {
1546 rc = arch_phys_wc_add(info->fix.smem_start, temp_size);
1547 temp_size >>= 1;
1548 } while (temp_size >= PAGE_SIZE && rc == -EINVAL);
1549
1550 if (rc >= 0)
1551 par->mtrr_handle = rc;
1552 }
1553}
1554
1555static void uvesafb_ioremap(struct fb_info *info)
1556{
1557 info->screen_base = ioremap_wc(info->fix.smem_start, info->fix.smem_len);
1558}
1559
1560static ssize_t uvesafb_show_vbe_ver(struct device *dev,
1561 struct device_attribute *attr, char *buf)
1562{
1563 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1564 struct uvesafb_par *par = info->par;
1565
1566 return snprintf(buf, PAGE_SIZE, "%.4x\n", par->vbe_ib.vbe_version);
1567}
1568
1569static DEVICE_ATTR(vbe_version, S_IRUGO, uvesafb_show_vbe_ver, NULL);
1570
1571static ssize_t uvesafb_show_vbe_modes(struct device *dev,
1572 struct device_attribute *attr, char *buf)
1573{
1574 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1575 struct uvesafb_par *par = info->par;
1576 int ret = 0, i;
1577
1578 for (i = 0; i < par->vbe_modes_cnt && ret < PAGE_SIZE; i++) {
1579 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1580 "%dx%d-%d, 0x%.4x\n",
1581 par->vbe_modes[i].x_res, par->vbe_modes[i].y_res,
1582 par->vbe_modes[i].depth, par->vbe_modes[i].mode_id);
1583 }
1584
1585 return ret;
1586}
1587
1588static DEVICE_ATTR(vbe_modes, S_IRUGO, uvesafb_show_vbe_modes, NULL);
1589
1590static ssize_t uvesafb_show_vendor(struct device *dev,
1591 struct device_attribute *attr, char *buf)
1592{
1593 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1594 struct uvesafb_par *par = info->par;
1595
1596 if (par->vbe_ib.oem_vendor_name_ptr)
1597 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1598 (&par->vbe_ib) + par->vbe_ib.oem_vendor_name_ptr);
1599 else
1600 return 0;
1601}
1602
1603static DEVICE_ATTR(oem_vendor, S_IRUGO, uvesafb_show_vendor, NULL);
1604
1605static ssize_t uvesafb_show_product_name(struct device *dev,
1606 struct device_attribute *attr, char *buf)
1607{
1608 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1609 struct uvesafb_par *par = info->par;
1610
1611 if (par->vbe_ib.oem_product_name_ptr)
1612 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1613 (&par->vbe_ib) + par->vbe_ib.oem_product_name_ptr);
1614 else
1615 return 0;
1616}
1617
1618static DEVICE_ATTR(oem_product_name, S_IRUGO, uvesafb_show_product_name, NULL);
1619
1620static ssize_t uvesafb_show_product_rev(struct device *dev,
1621 struct device_attribute *attr, char *buf)
1622{
1623 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1624 struct uvesafb_par *par = info->par;
1625
1626 if (par->vbe_ib.oem_product_rev_ptr)
1627 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1628 (&par->vbe_ib) + par->vbe_ib.oem_product_rev_ptr);
1629 else
1630 return 0;
1631}
1632
1633static DEVICE_ATTR(oem_product_rev, S_IRUGO, uvesafb_show_product_rev, NULL);
1634
1635static ssize_t uvesafb_show_oem_string(struct device *dev,
1636 struct device_attribute *attr, char *buf)
1637{
1638 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1639 struct uvesafb_par *par = info->par;
1640
1641 if (par->vbe_ib.oem_string_ptr)
1642 return snprintf(buf, PAGE_SIZE, "%s\n",
1643 (char *)(&par->vbe_ib) + par->vbe_ib.oem_string_ptr);
1644 else
1645 return 0;
1646}
1647
1648static DEVICE_ATTR(oem_string, S_IRUGO, uvesafb_show_oem_string, NULL);
1649
1650static ssize_t uvesafb_show_nocrtc(struct device *dev,
1651 struct device_attribute *attr, char *buf)
1652{
1653 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1654 struct uvesafb_par *par = info->par;
1655
1656 return snprintf(buf, PAGE_SIZE, "%d\n", par->nocrtc);
1657}
1658
1659static ssize_t uvesafb_store_nocrtc(struct device *dev,
1660 struct device_attribute *attr, const char *buf, size_t count)
1661{
1662 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1663 struct uvesafb_par *par = info->par;
1664
1665 if (count > 0) {
1666 if (buf[0] == '0')
1667 par->nocrtc = 0;
1668 else
1669 par->nocrtc = 1;
1670 }
1671 return count;
1672}
1673
1674static DEVICE_ATTR(nocrtc, S_IRUGO | S_IWUSR, uvesafb_show_nocrtc,
1675 uvesafb_store_nocrtc);
1676
1677static struct attribute *uvesafb_dev_attrs[] = {
1678 &dev_attr_vbe_version.attr,
1679 &dev_attr_vbe_modes.attr,
1680 &dev_attr_oem_vendor.attr,
1681 &dev_attr_oem_product_name.attr,
1682 &dev_attr_oem_product_rev.attr,
1683 &dev_attr_oem_string.attr,
1684 &dev_attr_nocrtc.attr,
1685 NULL,
1686};
1687
1688static struct attribute_group uvesafb_dev_attgrp = {
1689 .name = NULL,
1690 .attrs = uvesafb_dev_attrs,
1691};
1692
1693static int uvesafb_probe(struct platform_device *dev)
1694{
1695 struct fb_info *info;
1696 struct vbe_mode_ib *mode = NULL;
1697 struct uvesafb_par *par;
1698 int err = 0, i;
1699
1700 info = framebuffer_alloc(sizeof(*par) + sizeof(u32) * 256, &dev->dev);
1701 if (!info)
1702 return -ENOMEM;
1703
1704 par = info->par;
1705
1706 err = uvesafb_vbe_init(info);
1707 if (err) {
1708 printk(KERN_ERR "uvesafb: vbe_init() failed with %d\n", err);
1709 goto out;
1710 }
1711
1712 info->fbops = &uvesafb_ops;
1713
1714 i = uvesafb_vbe_init_mode(info);
1715 if (i < 0) {
1716 err = -EINVAL;
1717 goto out;
1718 } else {
1719 mode = &par->vbe_modes[i];
1720 }
1721
1722 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
1723 err = -ENXIO;
1724 goto out;
1725 }
1726
1727 uvesafb_init_info(info, mode);
1728
1729 if (!request_region(0x3c0, 32, "uvesafb")) {
1730 printk(KERN_ERR "uvesafb: request region 0x3c0-0x3e0 failed\n");
1731 err = -EIO;
1732 goto out_mode;
1733 }
1734
1735 if (!request_mem_region(info->fix.smem_start, info->fix.smem_len,
1736 "uvesafb")) {
1737 printk(KERN_ERR "uvesafb: cannot reserve video memory at "
1738 "0x%lx\n", info->fix.smem_start);
1739 err = -EIO;
1740 goto out_reg;
1741 }
1742
1743 uvesafb_init_mtrr(info);
1744 uvesafb_ioremap(info);
1745
1746 if (!info->screen_base) {
1747 printk(KERN_ERR
1748 "uvesafb: abort, cannot ioremap 0x%x bytes of video "
1749 "memory at 0x%lx\n",
1750 info->fix.smem_len, info->fix.smem_start);
1751 err = -EIO;
1752 goto out_mem;
1753 }
1754
1755 platform_set_drvdata(dev, info);
1756
1757 if (register_framebuffer(info) < 0) {
1758 printk(KERN_ERR
1759 "uvesafb: failed to register framebuffer device\n");
1760 err = -EINVAL;
1761 goto out_unmap;
1762 }
1763
1764 printk(KERN_INFO "uvesafb: framebuffer at 0x%lx, mapped to 0x%p, "
1765 "using %dk, total %dk\n", info->fix.smem_start,
1766 info->screen_base, info->fix.smem_len/1024,
1767 par->vbe_ib.total_memory * 64);
1768 fb_info(info, "%s frame buffer device\n", info->fix.id);
1769
1770 err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1771 if (err != 0)
1772 fb_warn(info, "failed to register attributes\n");
1773
1774 return 0;
1775
1776out_unmap:
1777 iounmap(info->screen_base);
1778out_mem:
1779 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1780out_reg:
1781 release_region(0x3c0, 32);
1782out_mode:
1783 if (!list_empty(&info->modelist))
1784 fb_destroy_modelist(&info->modelist);
1785 fb_destroy_modedb(info->monspecs.modedb);
1786 fb_dealloc_cmap(&info->cmap);
1787out:
1788 kfree(par->vbe_modes);
1789
1790 framebuffer_release(info);
1791 return err;
1792}
1793
1794static int uvesafb_remove(struct platform_device *dev)
1795{
1796 struct fb_info *info = platform_get_drvdata(dev);
1797
1798 if (info) {
1799 struct uvesafb_par *par = info->par;
1800
1801 sysfs_remove_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1802 unregister_framebuffer(info);
1803 release_region(0x3c0, 32);
1804 iounmap(info->screen_base);
1805 arch_phys_wc_del(par->mtrr_handle);
1806 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1807 fb_destroy_modedb(info->monspecs.modedb);
1808 fb_dealloc_cmap(&info->cmap);
1809
1810 kfree(par->vbe_modes);
1811 kfree(par->vbe_state_orig);
1812 kfree(par->vbe_state_saved);
1813
1814 framebuffer_release(info);
1815 }
1816 return 0;
1817}
1818
1819static struct platform_driver uvesafb_driver = {
1820 .probe = uvesafb_probe,
1821 .remove = uvesafb_remove,
1822 .driver = {
1823 .name = "uvesafb",
1824 },
1825};
1826
1827static struct platform_device *uvesafb_device;
1828
1829#ifndef MODULE
1830static int uvesafb_setup(char *options)
1831{
1832 char *this_opt;
1833
1834 if (!options || !*options)
1835 return 0;
1836
1837 while ((this_opt = strsep(&options, ",")) != NULL) {
1838 if (!*this_opt) continue;
1839
1840 if (!strcmp(this_opt, "redraw"))
1841 ypan = 0;
1842 else if (!strcmp(this_opt, "ypan"))
1843 ypan = 1;
1844 else if (!strcmp(this_opt, "ywrap"))
1845 ypan = 2;
1846 else if (!strcmp(this_opt, "vgapal"))
1847 pmi_setpal = 0;
1848 else if (!strcmp(this_opt, "pmipal"))
1849 pmi_setpal = 1;
1850 else if (!strncmp(this_opt, "mtrr:", 5))
1851 mtrr = simple_strtoul(this_opt+5, NULL, 0);
1852 else if (!strcmp(this_opt, "nomtrr"))
1853 mtrr = 0;
1854 else if (!strcmp(this_opt, "nocrtc"))
1855 nocrtc = 1;
1856 else if (!strcmp(this_opt, "noedid"))
1857 noedid = 1;
1858 else if (!strcmp(this_opt, "noblank"))
1859 blank = 0;
1860 else if (!strncmp(this_opt, "vtotal:", 7))
1861 vram_total = simple_strtoul(this_opt + 7, NULL, 0);
1862 else if (!strncmp(this_opt, "vremap:", 7))
1863 vram_remap = simple_strtoul(this_opt + 7, NULL, 0);
1864 else if (!strncmp(this_opt, "maxhf:", 6))
1865 maxhf = simple_strtoul(this_opt + 6, NULL, 0);
1866 else if (!strncmp(this_opt, "maxvf:", 6))
1867 maxvf = simple_strtoul(this_opt + 6, NULL, 0);
1868 else if (!strncmp(this_opt, "maxclk:", 7))
1869 maxclk = simple_strtoul(this_opt + 7, NULL, 0);
1870 else if (!strncmp(this_opt, "vbemode:", 8))
1871 vbemode = simple_strtoul(this_opt + 8, NULL, 0);
1872 else if (this_opt[0] >= '0' && this_opt[0] <= '9') {
1873 mode_option = this_opt;
1874 } else {
1875 printk(KERN_WARNING
1876 "uvesafb: unrecognized option %s\n", this_opt);
1877 }
1878 }
1879
1880 if (mtrr != 3 && mtrr != 0)
1881 pr_warn("uvesafb: mtrr should be set to 0 or 3; %d is unsupported", mtrr);
1882
1883 return 0;
1884}
1885#endif /* !MODULE */
1886
1887static ssize_t show_v86d(struct device_driver *dev, char *buf)
1888{
1889 return snprintf(buf, PAGE_SIZE, "%s\n", v86d_path);
1890}
1891
1892static ssize_t store_v86d(struct device_driver *dev, const char *buf,
1893 size_t count)
1894{
1895 strncpy(v86d_path, buf, PATH_MAX);
1896 return count;
1897}
1898
1899static DRIVER_ATTR(v86d, S_IRUGO | S_IWUSR, show_v86d, store_v86d);
1900
1901static int uvesafb_init(void)
1902{
1903 int err;
1904
1905#ifndef MODULE
1906 char *option = NULL;
1907
1908 if (fb_get_options("uvesafb", &option))
1909 return -ENODEV;
1910 uvesafb_setup(option);
1911#endif
1912 err = cn_add_callback(&uvesafb_cn_id, "uvesafb", uvesafb_cn_callback);
1913 if (err)
1914 return err;
1915
1916 err = platform_driver_register(&uvesafb_driver);
1917
1918 if (!err) {
1919 uvesafb_device = platform_device_alloc("uvesafb", 0);
1920 if (uvesafb_device)
1921 err = platform_device_add(uvesafb_device);
1922 else
1923 err = -ENOMEM;
1924
1925 if (err) {
1926 if (uvesafb_device)
1927 platform_device_put(uvesafb_device);
1928 platform_driver_unregister(&uvesafb_driver);
1929 cn_del_callback(&uvesafb_cn_id);
1930 return err;
1931 }
1932
1933 err = driver_create_file(&uvesafb_driver.driver,
1934 &driver_attr_v86d);
1935 if (err) {
1936 printk(KERN_WARNING "uvesafb: failed to register "
1937 "attributes\n");
1938 err = 0;
1939 }
1940 }
1941 return err;
1942}
1943
1944module_init(uvesafb_init);
1945
1946static void uvesafb_exit(void)
1947{
1948 struct uvesafb_ktask *task;
1949
1950 if (v86d_started) {
1951 task = uvesafb_prep();
1952 if (task) {
1953 task->t.flags = TF_EXIT;
1954 uvesafb_exec(task);
1955 uvesafb_free(task);
1956 }
1957 }
1958
1959 cn_del_callback(&uvesafb_cn_id);
1960 driver_remove_file(&uvesafb_driver.driver, &driver_attr_v86d);
1961 platform_device_unregister(uvesafb_device);
1962 platform_driver_unregister(&uvesafb_driver);
1963}
1964
1965module_exit(uvesafb_exit);
1966
1967static int param_set_scroll(const char *val, const struct kernel_param *kp)
1968{
1969 ypan = 0;
1970
1971 if (!strcmp(val, "redraw"))
1972 ypan = 0;
1973 else if (!strcmp(val, "ypan"))
1974 ypan = 1;
1975 else if (!strcmp(val, "ywrap"))
1976 ypan = 2;
1977 else
1978 return -EINVAL;
1979
1980 return 0;
1981}
1982static struct kernel_param_ops param_ops_scroll = {
1983 .set = param_set_scroll,
1984};
1985#define param_check_scroll(name, p) __param_check(name, p, void)
1986
1987module_param_named(scroll, ypan, scroll, 0);
1988MODULE_PARM_DESC(scroll,
1989 "Scrolling mode, set to 'redraw', 'ypan', or 'ywrap'");
1990module_param_named(vgapal, pmi_setpal, invbool, 0);
1991MODULE_PARM_DESC(vgapal, "Set palette using VGA registers");
1992module_param_named(pmipal, pmi_setpal, bool, 0);
1993MODULE_PARM_DESC(pmipal, "Set palette using PMI calls");
1994module_param(mtrr, uint, 0);
1995MODULE_PARM_DESC(mtrr,
1996 "Memory Type Range Registers setting. Use 0 to disable.");
1997module_param(blank, bool, 0);
1998MODULE_PARM_DESC(blank, "Enable hardware blanking");
1999module_param(nocrtc, bool, 0);
2000MODULE_PARM_DESC(nocrtc, "Ignore CRTC timings when setting modes");
2001module_param(noedid, bool, 0);
2002MODULE_PARM_DESC(noedid,
2003 "Ignore EDID-provided monitor limits when setting modes");
2004module_param(vram_remap, uint, 0);
2005MODULE_PARM_DESC(vram_remap, "Set amount of video memory to be used [MiB]");
2006module_param(vram_total, uint, 0);
2007MODULE_PARM_DESC(vram_total, "Set total amount of video memoery [MiB]");
2008module_param(maxclk, ushort, 0);
2009MODULE_PARM_DESC(maxclk, "Maximum pixelclock [MHz], overrides EDID data");
2010module_param(maxhf, ushort, 0);
2011MODULE_PARM_DESC(maxhf,
2012 "Maximum horizontal frequency [kHz], overrides EDID data");
2013module_param(maxvf, ushort, 0);
2014MODULE_PARM_DESC(maxvf,
2015 "Maximum vertical frequency [Hz], overrides EDID data");
2016module_param(mode_option, charp, 0);
2017MODULE_PARM_DESC(mode_option,
2018 "Specify initial video mode as \"<xres>x<yres>[-<bpp>][@<refresh>]\"");
2019module_param(vbemode, ushort, 0);
2020MODULE_PARM_DESC(vbemode,
2021 "VBE mode number to set, overrides the 'mode' option");
2022module_param_string(v86d, v86d_path, PATH_MAX, 0660);
2023MODULE_PARM_DESC(v86d, "Path to the v86d userspace helper.");
2024
2025MODULE_LICENSE("GPL");
2026MODULE_AUTHOR("Michal Januszewski <spock@gentoo.org>");
2027MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards");
2028
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