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video: uvesafb: Fix integer overflow in allocation
[mirror_ubuntu-bionic-kernel.git] / drivers / video / fbdev / 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 */
a8feae09
JP		 8
9#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10
8bdb3a2d
MJ		 11#include <linux/init.h>
12#include <linux/module.h>
13#include <linux/moduleparam.h>
14#include <linux/skbuff.h>
15#include <linux/timer.h>
16#include <linux/completion.h>
17#include <linux/connector.h>
18#include <linux/random.h>
19#include <linux/platform_device.h>
20#include <linux/limits.h>
21#include <linux/fb.h>
22#include <linux/io.h>
23#include <linux/mutex.h>
5a0e3ad6 24#include <linux/slab.h>
8bdb3a2d
MJ		 25#include <video/edid.h>
26#include <video/uvesafb.h>
27#ifdef CONFIG_X86
28#include <video/vga.h>
29#endif
8bdb3a2d
MJ		 30#include "edid.h"
31
32static struct cb_id uvesafb_cn_id = {
33 .idx = CN_IDX_V86D,
34 .val = CN_VAL_V86D_UVESAFB
35};
36static char v86d_path[PATH_MAX] = "/sbin/v86d";
37static char v86d_started; /* has v86d been started by uvesafb? */
38
ca9384c5 39static const struct fb_fix_screeninfo uvesafb_fix = {
8bdb3a2d
MJ		 40 .id = "VESA VGA",
41 .type = FB_TYPE_PACKED_PIXELS,
42 .accel = FB_ACCEL_NONE,
43 .visual = FB_VISUAL_TRUECOLOR,
44};
45
48c68c4f
GKH		 46static int mtrr = 3; /* enable mtrr by default */
47static bool blank = 1; /* enable blanking by default */
48static int ypan = 1; /* 0: scroll, 1: ypan, 2: ywrap */
49static bool pmi_setpal = true; /* use PMI for palette changes */
50static bool nocrtc; /* ignore CRTC settings */
51static bool noedid; /* don't try DDC transfers */
52static int vram_remap; /* set amt. of memory to be used */
53static int vram_total; /* set total amount of memory */
54static u16 maxclk; /* maximum pixel clock */
55static u16 maxvf; /* maximum vertical frequency */
56static u16 maxhf; /* maximum horizontal frequency */
57static u16 vbemode; /* force use of a specific VBE mode */
58static char *mode_option;
0ca1071f 59static u8 dac_width = 6;
8bdb3a2d
MJ		 60
61static struct uvesafb_ktask *uvfb_tasks[UVESAFB_TASKS_MAX];
62static DEFINE_MUTEX(uvfb_lock);
63
64/*
65 * A handler for replies from userspace.
66 *
67 * Make sure each message passes consistency checks and if it does,
68 * find the kernel part of the task struct, copy the registers and
69 * the buffer contents and then complete the task.
70 */
7069331d 71static void uvesafb_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp)
8bdb3a2d 72{
8bdb3a2d
MJ		 73 struct uvesafb_task *utask;
74 struct uvesafb_ktask *task;
75
38bf1953 76 if (!capable(CAP_SYS_ADMIN))
cc44578b
PR		 77 return;
78
8bdb3a2d
MJ		 79 if (msg->seq >= UVESAFB_TASKS_MAX)
80 return;
81
82 mutex_lock(&uvfb_lock);
83 task = uvfb_tasks[msg->seq];
84
85 if (!task || msg->ack != task->ack) {
86 mutex_unlock(&uvfb_lock);
87 return;
88 }
89
90 utask = (struct uvesafb_task *)msg->data;
91
92 /* Sanity checks for the buffer length. */
93 if (task->t.buf_len < utask->buf_len ||
94 utask->buf_len > msg->len - sizeof(*utask)) {
95 mutex_unlock(&uvfb_lock);
96 return;
97 }
98
99 uvfb_tasks[msg->seq] = NULL;
100 mutex_unlock(&uvfb_lock);
101
102 memcpy(&task->t, utask, sizeof(*utask));
103
104 if (task->t.buf_len && task->buf)
105 memcpy(task->buf, utask + 1, task->t.buf_len);
106
107 complete(task->done);
108 return;
109}
110
111static int uvesafb_helper_start(void)
112{
113 char *envp[] = {
114 "HOME=/",
115 "PATH=/sbin:/bin",
116 NULL,
117 };
118
119 char *argv[] = {
120 v86d_path,
121 NULL,
122 };
123
70834d30 124 return call_usermodehelper(v86d_path, argv, envp, UMH_WAIT_PROC);
8bdb3a2d
MJ		 125}
126
127/*
128 * Execute a uvesafb task.
129 *
130 * Returns 0 if the task is executed successfully.
131 *
132 * A message sent to the userspace consists of the uvesafb_task
133 * struct and (optionally) a buffer. The uvesafb_task struct is
134 * a simplified version of uvesafb_ktask (its kernel counterpart)
135 * containing only the register values, flags and the length of
136 * the buffer.
137 *
138 * Each message is assigned a sequence number (increased linearly)
139 * and a random ack number. The sequence number is used as a key
140 * for the uvfb_tasks array which holds pointers to uvesafb_ktask
141 * structs for all requests.
142 */
143static int uvesafb_exec(struct uvesafb_ktask *task)
144{
145 static int seq;
146 struct cn_msg *m;
147 int err;
148 int len = sizeof(task->t) + task->t.buf_len;
149
150 /*
151 * Check whether the message isn't longer than the maximum
152 * allowed by connector.
153 */
154 if (sizeof(*m) + len > CONNECTOR_MAX_MSG_SIZE) {
a8feae09
JP		 155 pr_warn("message too long (%d), can't execute task\n",
156 (int)(sizeof(*m) + len));
8bdb3a2d
MJ		 157 return -E2BIG;
158 }
159
160 m = kzalloc(sizeof(*m) + len, GFP_KERNEL);
161 if (!m)
162 return -ENOMEM;
163
164 init_completion(task->done);
165
166 memcpy(&m->id, &uvesafb_cn_id, sizeof(m->id));
167 m->seq = seq;
168 m->len = len;
314f8477 169 m->ack = prandom_u32();
8bdb3a2d
MJ		 170
171 /* uvesafb_task structure */
172 memcpy(m + 1, &task->t, sizeof(task->t));
173
174 /* Buffer */
175 memcpy((u8 *)(m + 1) + sizeof(task->t), task->buf, task->t.buf_len);
176
177 /*
178 * Save the message ack number so that we can find the kernel
179 * part of this task when a reply is received from userspace.
180 */
181 task->ack = m->ack;
182
183 mutex_lock(&uvfb_lock);
184
185 /* If all slots are taken -- bail out. */
186 if (uvfb_tasks[seq]) {
187 mutex_unlock(&uvfb_lock);
60c1645d
AM		 188 err = -EBUSY;
189 goto out;
8bdb3a2d
MJ		 190 }
191
192 /* Save a pointer to the kernel part of the task struct. */
193 uvfb_tasks[seq] = task;
194 mutex_unlock(&uvfb_lock);
195
ac8f7330 196 err = cn_netlink_send(m, 0, 0, GFP_KERNEL);
8bdb3a2d
MJ		 197 if (err == -ESRCH) {
198 /*
199 * Try to start the userspace helper if sending
200 * the request failed the first time.
201 */
202 err = uvesafb_helper_start();
203 if (err) {
a8feae09
JP		 204 pr_err("failed to execute %s\n", v86d_path);
205 pr_err("make sure that the v86d helper is installed and executable\n");
8bdb3a2d
MJ		 206 } else {
207 v86d_started = 1;
ac8f7330 208 err = cn_netlink_send(m, 0, 0, gfp_any());
ff491a73
PNA		 209 if (err == -ENOBUFS)
210 err = 0;
8bdb3a2d 211 }
ff491a73
PNA		 212 } else if (err == -ENOBUFS)
213 err = 0;
8bdb3a2d
MJ		 214
215 if (!err && !(task->t.flags & TF_EXIT))
216 err = !wait_for_completion_timeout(task->done,
217 msecs_to_jiffies(UVESAFB_TIMEOUT));
218
219 mutex_lock(&uvfb_lock);
220 uvfb_tasks[seq] = NULL;
221 mutex_unlock(&uvfb_lock);
222
223 seq++;
224 if (seq >= UVESAFB_TASKS_MAX)
225 seq = 0;
60c1645d
AM		 226out:
227 kfree(m);
8bdb3a2d
MJ		 228 return err;
229}
230
231/*
232 * Free a uvesafb_ktask struct.
233 */
234static void uvesafb_free(struct uvesafb_ktask *task)
235{
236 if (task) {
b1dfee60 237 kfree(task->done);
8bdb3a2d
MJ		 238 kfree(task);
239 }
240}
241
242/*
243 * Prepare a uvesafb_ktask struct to be used again.
244 */
245static void uvesafb_reset(struct uvesafb_ktask *task)
246{
247 struct completion *cpl = task->done;
248
249 memset(task, 0, sizeof(*task));
250 task->done = cpl;
251}
252
253/*
254 * Allocate and prepare a uvesafb_ktask struct.
255 */
256static struct uvesafb_ktask *uvesafb_prep(void)
257{
258 struct uvesafb_ktask *task;
259
260 task = kzalloc(sizeof(*task), GFP_KERNEL);
261 if (task) {
262 task->done = kzalloc(sizeof(*task->done), GFP_KERNEL);
263 if (!task->done) {
264 kfree(task);
265 task = NULL;
266 }
267 }
268 return task;
269}
270
271static void uvesafb_setup_var(struct fb_var_screeninfo *var,
272 struct fb_info *info, struct vbe_mode_ib *mode)
273{
274 struct uvesafb_par *par = info->par;
275
276 var->vmode = FB_VMODE_NONINTERLACED;
277 var->sync = FB_SYNC_VERT_HIGH_ACT;
278
279 var->xres = mode->x_res;
280 var->yres = mode->y_res;
281 var->xres_virtual = mode->x_res;
282 var->yres_virtual = (par->ypan) ?
283 info->fix.smem_len / mode->bytes_per_scan_line :
284 mode->y_res;
285 var->xoffset = 0;
286 var->yoffset = 0;
287 var->bits_per_pixel = mode->bits_per_pixel;
288
289 if (var->bits_per_pixel == 15)
290 var->bits_per_pixel = 16;
291
292 if (var->bits_per_pixel > 8) {
293 var->red.offset = mode->red_off;
294 var->red.length = mode->red_len;
295 var->green.offset = mode->green_off;
296 var->green.length = mode->green_len;
297 var->blue.offset = mode->blue_off;
298 var->blue.length = mode->blue_len;
299 var->transp.offset = mode->rsvd_off;
300 var->transp.length = mode->rsvd_len;
301 } else {
302 var->red.offset = 0;
303 var->green.offset = 0;
304 var->blue.offset = 0;
305 var->transp.offset = 0;
306
0ca1071f
MJ		 307 var->red.length = 8;
308 var->green.length = 8;
309 var->blue.length = 8;
310 var->transp.length = 0;
8bdb3a2d
MJ		 311 }
312}
313
314static int uvesafb_vbe_find_mode(struct uvesafb_par *par,
315 int xres, int yres, int depth, unsigned char flags)
316{
317 int i, match = -1, h = 0, d = 0x7fffffff;
318
319 for (i = 0; i < par->vbe_modes_cnt; i++) {
320 h = abs(par->vbe_modes[i].x_res - xres) +
321 abs(par->vbe_modes[i].y_res - yres) +
322 abs(depth - par->vbe_modes[i].depth);
323
324 /*
325 * We have an exact match in terms of resolution
326 * and depth.
327 */
328 if (h == 0)
329 return i;
330
331 if (h < d || (h == d && par->vbe_modes[i].depth > depth)) {
332 d = h;
333 match = i;
334 }
335 }
336 i = 1;
337
338 if (flags & UVESAFB_EXACT_DEPTH &&
339 par->vbe_modes[match].depth != depth)
340 i = 0;
341
342 if (flags & UVESAFB_EXACT_RES && d > 24)
343 i = 0;
344
345 if (i != 0)
346 return match;
347 else
348 return -1;
349}
350
351static u8 *uvesafb_vbe_state_save(struct uvesafb_par *par)
352{
353 struct uvesafb_ktask *task;
354 u8 *state;
355 int err;
356
357 if (!par->vbe_state_size)
358 return NULL;
359
360 state = kmalloc(par->vbe_state_size, GFP_KERNEL);
361 if (!state)
c2bc0a75 362 return ERR_PTR(-ENOMEM);
8bdb3a2d
MJ		 363
364 task = uvesafb_prep();
365 if (!task) {
366 kfree(state);
367 return NULL;
368 }
369
370 task->t.regs.eax = 0x4f04;
371 task->t.regs.ecx = 0x000f;
372 task->t.regs.edx = 0x0001;
373 task->t.flags = TF_BUF_RET | TF_BUF_ESBX;
374 task->t.buf_len = par->vbe_state_size;
375 task->buf = state;
376 err = uvesafb_exec(task);
377
378 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
a8feae09
JP		 379 pr_warn("VBE get state call failed (eax=0x%x, err=%d)\n",
380 task->t.regs.eax, err);
8bdb3a2d
MJ		 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)
a8feae09
JP		 410 pr_warn("VBE state restore call failed (eax=0x%x, err=%d)\n",
411 task->t.regs.eax, err);
8bdb3a2d
MJ		 412
413 uvesafb_free(task);
414}
415
48c68c4f
GKH		 416static int uvesafb_vbe_getinfo(struct uvesafb_ktask *task,
417 struct uvesafb_par *par)
8bdb3a2d
MJ		 418{
419 int err;
420
421 task->t.regs.eax = 0x4f00;
422 task->t.flags = TF_VBEIB;
423 task->t.buf_len = sizeof(struct vbe_ib);
424 task->buf = &par->vbe_ib;
425 strncpy(par->vbe_ib.vbe_signature, "VBE2", 4);
426
427 err = uvesafb_exec(task);
428 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
a8feae09
JP		 429 pr_err("Getting VBE info block failed (eax=0x%x, err=%d)\n",
430 (u32)task->t.regs.eax, err);
8bdb3a2d
MJ		 431 return -EINVAL;
432 }
433
434 if (par->vbe_ib.vbe_version < 0x0200) {
a8feae09 435 pr_err("Sorry, pre-VBE 2.0 cards are not supported\n");
8bdb3a2d
MJ		 436 return -EINVAL;
437 }
438
439 if (!par->vbe_ib.mode_list_ptr) {
a8feae09 440 pr_err("Missing mode list!\n");
8bdb3a2d
MJ		 441 return -EINVAL;
442 }
443
a8feae09 444 pr_info("");
8bdb3a2d
MJ		 445
446 /*
447 * Convert string pointers and the mode list pointer into
448 * usable addresses. Print informational messages about the
449 * video adapter and its vendor.
450 */
451 if (par->vbe_ib.oem_vendor_name_ptr)
a8feae09 452 pr_cont("%s, ",
8bdb3a2d
MJ		 453 ((char *)task->buf) + par->vbe_ib.oem_vendor_name_ptr);
454
455 if (par->vbe_ib.oem_product_name_ptr)
a8feae09 456 pr_cont("%s, ",
8bdb3a2d
MJ		 457 ((char *)task->buf) + par->vbe_ib.oem_product_name_ptr);
458
459 if (par->vbe_ib.oem_product_rev_ptr)
a8feae09 460 pr_cont("%s, ",
8bdb3a2d
MJ		 461 ((char *)task->buf) + par->vbe_ib.oem_product_rev_ptr);
462
463 if (par->vbe_ib.oem_string_ptr)
a8feae09 464 pr_cont("OEM: %s, ",
8bdb3a2d
MJ		 465 ((char *)task->buf) + par->vbe_ib.oem_string_ptr);
466
a8feae09
JP		 467 pr_cont("VBE v%d.%d\n",
468 (par->vbe_ib.vbe_version & 0xff00) >> 8,
469 par->vbe_ib.vbe_version & 0xff);
8bdb3a2d
MJ		 470
471 return 0;
472}
473
48c68c4f
GKH		 474static int uvesafb_vbe_getmodes(struct uvesafb_ktask *task,
475 struct uvesafb_par *par)
8bdb3a2d
MJ		 476{
477 int off = 0, err;
478 u16 *mode;
479
480 par->vbe_modes_cnt = 0;
481
482 /* Count available modes. */
483 mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
484 while (*mode != 0xffff) {
485 par->vbe_modes_cnt++;
486 mode++;
487 }
488
489 par->vbe_modes = kzalloc(sizeof(struct vbe_mode_ib) *
490 par->vbe_modes_cnt, GFP_KERNEL);
491 if (!par->vbe_modes)
492 return -ENOMEM;
493
494 /* Get info about all available modes. */
495 mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
496 while (*mode != 0xffff) {
497 struct vbe_mode_ib *mib;
498
499 uvesafb_reset(task);
500 task->t.regs.eax = 0x4f01;
501 task->t.regs.ecx = (u32) *mode;
502 task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
503 task->t.buf_len = sizeof(struct vbe_mode_ib);
504 task->buf = par->vbe_modes + off;
505
506 err = uvesafb_exec(task);
507 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
a8feae09 508 pr_warn("Getting mode info block for mode 0x%x failed (eax=0x%x, err=%d)\n",
8bdb3a2d 509 *mode, (u32)task->t.regs.eax, err);
9350cc90
MJ		 510 mode++;
511 par->vbe_modes_cnt--;
512 continue;
8bdb3a2d
MJ		 513 }
514
515 mib = task->buf;
516 mib->mode_id = *mode;
517
518 /*
519 * We only want modes that are supported with the current
520 * hardware configuration, color, graphics and that have
521 * support for the LFB.
522 */
523 if ((mib->mode_attr & VBE_MODE_MASK) == VBE_MODE_MASK &&
524 mib->bits_per_pixel >= 8)
525 off++;
526 else
527 par->vbe_modes_cnt--;
528
529 mode++;
530 mib->depth = mib->red_len + mib->green_len + mib->blue_len;
531
532 /*
533 * Handle 8bpp modes and modes with broken color component
534 * lengths.
535 */
536 if (mib->depth == 0 || (mib->depth == 24 &&
537 mib->bits_per_pixel == 32))
538 mib->depth = mib->bits_per_pixel;
539 }
540
9350cc90
MJ		 541 if (par->vbe_modes_cnt > 0)
542 return 0;
543 else
544 return -EINVAL;
8bdb3a2d
MJ		 545}
546
547/*
548 * The Protected Mode Interface is 32-bit x86 code, so we only run it on
549 * x86 and not x86_64.
550 */
551#ifdef CONFIG_X86_32
48c68c4f
GKH		 552static int uvesafb_vbe_getpmi(struct uvesafb_ktask *task,
553 struct uvesafb_par *par)
8bdb3a2d
MJ		 554{
555 int i, err;
556
557 uvesafb_reset(task);
558 task->t.regs.eax = 0x4f0a;
559 task->t.regs.ebx = 0x0;
560 err = uvesafb_exec(task);
561
562 if ((task->t.regs.eax & 0xffff) != 0x4f || task->t.regs.es < 0xc000) {
563 par->pmi_setpal = par->ypan = 0;
564 } else {
565 par->pmi_base = (u16 *)phys_to_virt(((u32)task->t.regs.es << 4)
566 + task->t.regs.edi);
567 par->pmi_start = (u8 *)par->pmi_base + par->pmi_base[1];
568 par->pmi_pal = (u8 *)par->pmi_base + par->pmi_base[2];
a8feae09
JP		 569 pr_info("protected mode interface info at %04x:%04x\n",
570 (u16)task->t.regs.es, (u16)task->t.regs.edi);
571 pr_info("pmi: set display start = %p, set palette = %p\n",
572 par->pmi_start, par->pmi_pal);
8bdb3a2d
MJ		 573
574 if (par->pmi_base[3]) {
a8feae09 575 pr_info("pmi: ports =");
8bdb3a2d
MJ		 576 for (i = par->pmi_base[3]/2;
577 par->pmi_base[i] != 0xffff; i++)
a8feae09
JP		 578 pr_cont(" %x", par->pmi_base[i]);
579 pr_cont("\n");
8bdb3a2d
MJ		 580
581 if (par->pmi_base[i] != 0xffff) {
a8feae09 582 pr_info("can't handle memory requests, pmi disabled\n");
8bdb3a2d
MJ		 583 par->ypan = par->pmi_setpal = 0;
584 }
585 }
586 }
587 return 0;
588}
589#endif /* CONFIG_X86_32 */
590
591/*
592 * Check whether a video mode is supported by the Video BIOS and is
593 * compatible with the monitor limits.
594 */
48c68c4f
GKH		 595static int uvesafb_is_valid_mode(struct fb_videomode *mode,
596 struct fb_info *info)
8bdb3a2d
MJ		 597{
598 if (info->monspecs.gtf) {
599 fb_videomode_to_var(&info->var, mode);
600 if (fb_validate_mode(&info->var, info))
601 return 0;
602 }
603
604 if (uvesafb_vbe_find_mode(info->par, mode->xres, mode->yres, 8,
605 UVESAFB_EXACT_RES) == -1)
606 return 0;
607
608 return 1;
609}
610
48c68c4f 611static int uvesafb_vbe_getedid(struct uvesafb_ktask *task, struct fb_info *info)
8bdb3a2d
MJ		 612{
613 struct uvesafb_par *par = info->par;
614 int err = 0;
615
616 if (noedid || par->vbe_ib.vbe_version < 0x0300)
617 return -EINVAL;
618
619 task->t.regs.eax = 0x4f15;
620 task->t.regs.ebx = 0;
621 task->t.regs.ecx = 0;
622 task->t.buf_len = 0;
623 task->t.flags = 0;
624
625 err = uvesafb_exec(task);
626
627 if ((task->t.regs.eax & 0xffff) != 0x004f || err)
628 return -EINVAL;
629
630 if ((task->t.regs.ebx & 0x3) == 3) {
a8feae09 631 pr_info("VBIOS/hardware supports both DDC1 and DDC2 transfers\n");
8bdb3a2d 632 } else if ((task->t.regs.ebx & 0x3) == 2) {
a8feae09 633 pr_info("VBIOS/hardware supports DDC2 transfers\n");
8bdb3a2d 634 } else if ((task->t.regs.ebx & 0x3) == 1) {
a8feae09 635 pr_info("VBIOS/hardware supports DDC1 transfers\n");
8bdb3a2d 636 } else {
a8feae09 637 pr_info("VBIOS/hardware doesn't support DDC transfers\n");
8bdb3a2d
MJ		 638 return -EINVAL;
639 }
640
641 task->t.regs.eax = 0x4f15;
642 task->t.regs.ebx = 1;
643 task->t.regs.ecx = task->t.regs.edx = 0;
644 task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
645 task->t.buf_len = EDID_LENGTH;
646 task->buf = kzalloc(EDID_LENGTH, GFP_KERNEL);
7ed25867
WY		 647 if (!task->buf)
648 return -ENOMEM;
8bdb3a2d
MJ		 649
650 err = uvesafb_exec(task);
651
652 if ((task->t.regs.eax & 0xffff) == 0x004f && !err) {
653 fb_edid_to_monspecs(task->buf, &info->monspecs);
654
655 if (info->monspecs.vfmax && info->monspecs.hfmax) {
656 /*
657 * If the maximum pixel clock wasn't specified in
658 * the EDID block, set it to 300 MHz.
659 */
660 if (info->monspecs.dclkmax == 0)
661 info->monspecs.dclkmax = 300 * 1000000;
662 info->monspecs.gtf = 1;
663 }
664 } else {
665 err = -EINVAL;
666 }
667
668 kfree(task->buf);
669 return err;
670}
671
48c68c4f
GKH		 672static void uvesafb_vbe_getmonspecs(struct uvesafb_ktask *task,
673 struct fb_info *info)
8bdb3a2d
MJ		 674{
675 struct uvesafb_par *par = info->par;
676 int i;
677
678 memset(&info->monspecs, 0, sizeof(info->monspecs));
679
680 /*
681 * If we don't get all necessary data from the EDID block,
682 * mark it as incompatible with the GTF and set nocrtc so
683 * that we always use the default BIOS refresh rate.
684 */
685 if (uvesafb_vbe_getedid(task, info)) {
686 info->monspecs.gtf = 0;
687 par->nocrtc = 1;
688 }
689
690 /* Kernel command line overrides. */
691 if (maxclk)
692 info->monspecs.dclkmax = maxclk * 1000000;
693 if (maxvf)
694 info->monspecs.vfmax = maxvf;
695 if (maxhf)
696 info->monspecs.hfmax = maxhf * 1000;
697
698 /*
699 * In case DDC transfers are not supported, the user can provide
700 * monitor limits manually. Lower limits are set to "safe" values.
701 */
702 if (info->monspecs.gtf == 0 && maxclk && maxvf && maxhf) {
703 info->monspecs.dclkmin = 0;
704 info->monspecs.vfmin = 60;
705 info->monspecs.hfmin = 29000;
706 info->monspecs.gtf = 1;
707 par->nocrtc = 0;
708 }
709
710 if (info->monspecs.gtf)
a8feae09
JP		 711 pr_info("monitor limits: vf = %d Hz, hf = %d kHz, clk = %d MHz\n",
712 info->monspecs.vfmax,
8bdb3a2d
MJ		 713 (int)(info->monspecs.hfmax / 1000),
714 (int)(info->monspecs.dclkmax / 1000000));
715 else
a8feae09 716 pr_info("no monitor limits have been set, default refresh rate will be used\n");
8bdb3a2d
MJ		 717
718 /* Add VBE modes to the modelist. */
719 for (i = 0; i < par->vbe_modes_cnt; i++) {
720 struct fb_var_screeninfo var;
721 struct vbe_mode_ib *mode;
722 struct fb_videomode vmode;
723
724 mode = &par->vbe_modes[i];
725 memset(&var, 0, sizeof(var));
726
727 var.xres = mode->x_res;
728 var.yres = mode->y_res;
729
730 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, &var, info);
731 fb_var_to_videomode(&vmode, &var);
732 fb_add_videomode(&vmode, &info->modelist);
733 }
734
735 /* Add valid VESA modes to our modelist. */
736 for (i = 0; i < VESA_MODEDB_SIZE; i++) {
737 if (uvesafb_is_valid_mode((struct fb_videomode *)
738 &vesa_modes[i], info))
739 fb_add_videomode(&vesa_modes[i], &info->modelist);
740 }
741
742 for (i = 0; i < info->monspecs.modedb_len; i++) {
743 if (uvesafb_is_valid_mode(&info->monspecs.modedb[i], info))
744 fb_add_videomode(&info->monspecs.modedb[i],
745 &info->modelist);
746 }
747
748 return;
749}
750
48c68c4f
GKH		 751static void uvesafb_vbe_getstatesize(struct uvesafb_ktask *task,
752 struct uvesafb_par *par)
8bdb3a2d
MJ		 753{
754 int err;
755
756 uvesafb_reset(task);
757
758 /*
759 * Get the VBE state buffer size. We want all available
760 * hardware state data (CL = 0x0f).
761 */
762 task->t.regs.eax = 0x4f04;
763 task->t.regs.ecx = 0x000f;
764 task->t.regs.edx = 0x0000;
765 task->t.flags = 0;
766
767 err = uvesafb_exec(task);
768
769 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
a8feae09 770 pr_warn("VBE state buffer size cannot be determined (eax=0x%x, err=%d)\n",
8bdb3a2d
MJ		 771 task->t.regs.eax, err);
772 par->vbe_state_size = 0;
773 return;
774 }
775
776 par->vbe_state_size = 64 * (task->t.regs.ebx & 0xffff);
777}
778
48c68c4f 779static int uvesafb_vbe_init(struct fb_info *info)
8bdb3a2d
MJ		 780{
781 struct uvesafb_ktask *task = NULL;
782 struct uvesafb_par *par = info->par;
783 int err;
784
785 task = uvesafb_prep();
786 if (!task)
787 return -ENOMEM;
788
789 err = uvesafb_vbe_getinfo(task, par);
790 if (err)
791 goto out;
792
793 err = uvesafb_vbe_getmodes(task, par);
794 if (err)
795 goto out;
796
797 par->nocrtc = nocrtc;
798#ifdef CONFIG_X86_32
799 par->pmi_setpal = pmi_setpal;
800 par->ypan = ypan;
801
b78f29ca
WY		 802 if (par->pmi_setpal || par->ypan) {
803 if (__supported_pte_mask & _PAGE_NX) {
804 par->pmi_setpal = par->ypan = 0;
a8feae09 805 pr_warn("NX protection is active, better not use the PMI\n");
b78f29ca
WY		 806 } else {
807 uvesafb_vbe_getpmi(task, par);
808 }
809 }
8bdb3a2d
MJ		 810#else
811 /* The protected mode interface is not available on non-x86. */
812 par->pmi_setpal = par->ypan = 0;
813#endif
814
815 INIT_LIST_HEAD(&info->modelist);
816 uvesafb_vbe_getmonspecs(task, info);
817 uvesafb_vbe_getstatesize(task, par);
818
819out: uvesafb_free(task);
820 return err;
821}
822
48c68c4f 823static int uvesafb_vbe_init_mode(struct fb_info *info)
8bdb3a2d
MJ		 824{
825 struct list_head *pos;
826 struct fb_modelist *modelist;
827 struct fb_videomode *mode;
828 struct uvesafb_par *par = info->par;
829 int i, modeid;
830
831 /* Has the user requested a specific VESA mode? */
832 if (vbemode) {
833 for (i = 0; i < par->vbe_modes_cnt; i++) {
834 if (par->vbe_modes[i].mode_id == vbemode) {
23b73654
MJ		 835 modeid = i;
836 uvesafb_setup_var(&info->var, info,
837 &par->vbe_modes[modeid]);
8bdb3a2d 838 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
23b73654 839 &info->var, info);
8bdb3a2d
MJ		 840 /*
841 * With pixclock set to 0, the default BIOS
842 * timings will be used in set_par().
843 */
844 info->var.pixclock = 0;
8bdb3a2d
MJ		 845 goto gotmode;
846 }
847 }
a8feae09 848 pr_info("requested VBE mode 0x%x is unavailable\n", vbemode);
8bdb3a2d
MJ		 849 vbemode = 0;
850 }
851
852 /* Count the modes in the modelist */
853 i = 0;
854 list_for_each(pos, &info->modelist)
855 i++;
856
857 /*
858 * Convert the modelist into a modedb so that we can use it with
859 * fb_find_mode().
860 */
861 mode = kzalloc(i * sizeof(*mode), GFP_KERNEL);
862 if (mode) {
863 i = 0;
864 list_for_each(pos, &info->modelist) {
865 modelist = list_entry(pos, struct fb_modelist, list);
866 mode[i] = modelist->mode;
867 i++;
868 }
869
870 if (!mode_option)
871 mode_option = UVESAFB_DEFAULT_MODE;
872
873 i = fb_find_mode(&info->var, info, mode_option, mode, i,
874 NULL, 8);
875
876 kfree(mode);
877 }
878
879 /* fb_find_mode() failed */
5e72b32d 880 if (i == 0) {
8bdb3a2d
MJ		 881 info->var.xres = 640;
882 info->var.yres = 480;
883 mode = (struct fb_videomode *)
884 fb_find_best_mode(&info->var, &info->modelist);
885
886 if (mode) {
887 fb_videomode_to_var(&info->var, mode);
888 } else {
889 modeid = par->vbe_modes[0].mode_id;
23b73654
MJ		 890 uvesafb_setup_var(&info->var, info,
891 &par->vbe_modes[modeid]);
8bdb3a2d 892 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
23b73654
MJ		 893 &info->var, info);
894
8bdb3a2d
MJ		 895 goto gotmode;
896 }
897 }
898
899 /* Look for a matching VBE mode. */
900 modeid = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres,
901 info->var.bits_per_pixel, UVESAFB_EXACT_RES);
902
903 if (modeid == -1)
904 return -EINVAL;
905
8bdb3a2d
MJ		 906 uvesafb_setup_var(&info->var, info, &par->vbe_modes[modeid]);
907
23b73654 908gotmode:
8bdb3a2d
MJ		 909 /*
910 * If we are not VBE3.0+ compliant, we're done -- the BIOS will
911 * ignore our timings anyway.
912 */
913 if (par->vbe_ib.vbe_version < 0x0300 || par->nocrtc)
914 fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
915 &info->var, info);
916
917 return modeid;
918}
919
920static int uvesafb_setpalette(struct uvesafb_pal_entry *entries, int count,
921 int start, struct fb_info *info)
922{
923 struct uvesafb_ktask *task;
03ad369a 924#ifdef CONFIG_X86
8bdb3a2d
MJ		 925 struct uvesafb_par *par = info->par;
926 int i = par->mode_idx;
03ad369a 927#endif
8bdb3a2d
MJ		 928 int err = 0;
929
930 /*
931 * We support palette modifications for 8 bpp modes only, so
932 * there can never be more than 256 entries.
933 */
934 if (start + count > 256)
935 return -EINVAL;
936
937#ifdef CONFIG_X86
938 /* Use VGA registers if mode is VGA-compatible. */
939 if (i >= 0 && i < par->vbe_modes_cnt &&
940 par->vbe_modes[i].mode_attr & VBE_MODE_VGACOMPAT) {
941 for (i = 0; i < count; i++) {
942 outb_p(start + i, dac_reg);
943 outb_p(entries[i].red, dac_val);
944 outb_p(entries[i].green, dac_val);
945 outb_p(entries[i].blue, dac_val);
946 }
947 }
948#ifdef CONFIG_X86_32
949 else if (par->pmi_setpal) {
950 __asm__ __volatile__(
951 "call *(%%esi)"
952 : /* no return value */
953 : "a" (0x4f09), /* EAX */
954 "b" (0), /* EBX */
955 "c" (count), /* ECX */
956 "d" (start), /* EDX */
957 "D" (entries), /* EDI */
958 "S" (&par->pmi_pal)); /* ESI */
959 }
960#endif /* CONFIG_X86_32 */
961 else
962#endif /* CONFIG_X86 */
963 {
964 task = uvesafb_prep();
965 if (!task)
966 return -ENOMEM;
967
968 task->t.regs.eax = 0x4f09;
969 task->t.regs.ebx = 0x0;
970 task->t.regs.ecx = count;
971 task->t.regs.edx = start;
972 task->t.flags = TF_BUF_ESDI;
973 task->t.buf_len = sizeof(struct uvesafb_pal_entry) * count;
974 task->buf = entries;
975
976 err = uvesafb_exec(task);
977 if ((task->t.regs.eax & 0xffff) != 0x004f)
978 err = 1;
979
980 uvesafb_free(task);
981 }
982 return err;
983}
984
985static int uvesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
986 unsigned blue, unsigned transp,
987 struct fb_info *info)
988{
989 struct uvesafb_pal_entry entry;
0ca1071f 990 int shift = 16 - dac_width;
8bdb3a2d
MJ		 991 int err = 0;
992
993 if (regno >= info->cmap.len)
994 return -EINVAL;
995
996 if (info->var.bits_per_pixel == 8) {
997 entry.red = red >> shift;
998 entry.green = green >> shift;
999 entry.blue = blue >> shift;
1000 entry.pad = 0;
1001
1002 err = uvesafb_setpalette(&entry, 1, regno, info);
1003 } else if (regno < 16) {
1004 switch (info->var.bits_per_pixel) {
1005 case 16:
1006 if (info->var.red.offset == 10) {
1007 /* 1:5:5:5 */
1008 ((u32 *) (info->pseudo_palette))[regno] =
1009 ((red & 0xf800) >> 1) |
1010 ((green & 0xf800) >> 6) |
1011 ((blue & 0xf800) >> 11);
1012 } else {
1013 /* 0:5:6:5 */
1014 ((u32 *) (info->pseudo_palette))[regno] =
1015 ((red & 0xf800) ) |
1016 ((green & 0xfc00) >> 5) |
1017 ((blue & 0xf800) >> 11);
1018 }
1019 break;
1020
1021 case 24:
1022 case 32:
1023 red >>= 8;
1024 green >>= 8;
1025 blue >>= 8;
1026 ((u32 *)(info->pseudo_palette))[regno] =
1027 (red << info->var.red.offset) |
1028 (green << info->var.green.offset) |
1029 (blue << info->var.blue.offset);
1030 break;
1031 }
1032 }
1033 return err;
1034}
1035
1036static int uvesafb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
1037{
1038 struct uvesafb_pal_entry *entries;
0ca1071f 1039 int shift = 16 - dac_width;
8bdb3a2d
MJ		 1040 int i, err = 0;
1041
1042 if (info->var.bits_per_pixel == 8) {
1043 if (cmap->start + cmap->len > info->cmap.start +
1044 info->cmap.len || cmap->start < info->cmap.start)
1045 return -EINVAL;
1046
575243c0
KC		 1047 entries = kmalloc_array(cmap->len, sizeof(*entries),
1048 GFP_KERNEL);
8bdb3a2d
MJ		 1049 if (!entries)
1050 return -ENOMEM;
1051
1052 for (i = 0; i < cmap->len; i++) {
1053 entries[i].red = cmap->red[i] >> shift;
1054 entries[i].green = cmap->green[i] >> shift;
1055 entries[i].blue = cmap->blue[i] >> shift;
1056 entries[i].pad = 0;
1057 }
1058 err = uvesafb_setpalette(entries, cmap->len, cmap->start, info);
1059 kfree(entries);
1060 } else {
1061 /*
1062 * For modes with bpp > 8, we only set the pseudo palette in
1063 * the fb_info struct. We rely on uvesafb_setcolreg to do all
1064 * sanity checking.
1065 */
1066 for (i = 0; i < cmap->len; i++) {
1067 err |= uvesafb_setcolreg(cmap->start + i, cmap->red[i],
1068 cmap->green[i], cmap->blue[i],
1069 0, info);
1070 }
1071 }
1072 return err;
1073}
1074
1075static int uvesafb_pan_display(struct fb_var_screeninfo *var,
1076 struct fb_info *info)
1077{
1078#ifdef CONFIG_X86_32
1079 int offset;
1080 struct uvesafb_par *par = info->par;
1081
1082 offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;
1083
1084 /*
1085 * It turns out it's not the best idea to do panning via vm86,
1086 * so we only allow it if we have a PMI.
1087 */
1088 if (par->pmi_start) {
1089 __asm__ __volatile__(
1090 "call *(%%edi)"
1091 : /* no return value */
1092 : "a" (0x4f07), /* EAX */
1093 "b" (0), /* EBX */
1094 "c" (offset), /* ECX */
1095 "d" (offset >> 16), /* EDX */
1096 "D" (&par->pmi_start)); /* EDI */
1097 }
1098#endif
1099 return 0;
1100}
1101
1102static int uvesafb_blank(int blank, struct fb_info *info)
1103{
8bdb3a2d
MJ		 1104 struct uvesafb_ktask *task;
1105 int err = 1;
8bdb3a2d 1106#ifdef CONFIG_X86
03ad369a
FL		 1107 struct uvesafb_par *par = info->par;
1108
8bdb3a2d
MJ		 1109 if (par->vbe_ib.capabilities & VBE_CAP_VGACOMPAT) {
1110 int loop = 10000;
1111 u8 seq = 0, crtc17 = 0;
1112
1113 if (blank == FB_BLANK_POWERDOWN) {
1114 seq = 0x20;
1115 crtc17 = 0x00;
1116 err = 0;
1117 } else {
1118 seq = 0x00;
1119 crtc17 = 0x80;
1120 err = (blank == FB_BLANK_UNBLANK) ? 0 : -EINVAL;
1121 }
1122
1123 vga_wseq(NULL, 0x00, 0x01);
1124 seq |= vga_rseq(NULL, 0x01) & ~0x20;
1125 vga_wseq(NULL, 0x00, seq);
1126
1127 crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80;
1128 while (loop--);
1129 vga_wcrt(NULL, 0x17, crtc17);
1130 vga_wseq(NULL, 0x00, 0x03);
1131 } else
1132#endif /* CONFIG_X86 */
1133 {
1134 task = uvesafb_prep();
1135 if (!task)
1136 return -ENOMEM;
1137
1138 task->t.regs.eax = 0x4f10;
1139 switch (blank) {
1140 case FB_BLANK_UNBLANK:
1141 task->t.regs.ebx = 0x0001;
1142 break;
1143 case FB_BLANK_NORMAL:
1144 task->t.regs.ebx = 0x0101; /* standby */
1145 break;
1146 case FB_BLANK_POWERDOWN:
1147 task->t.regs.ebx = 0x0401; /* powerdown */
1148 break;
1149 default:
1150 goto out;
1151 }
1152
1153 err = uvesafb_exec(task);
1154 if (err || (task->t.regs.eax & 0xffff) != 0x004f)
1155 err = 1;
1156out: uvesafb_free(task);
1157 }
1158 return err;
1159}
1160
1161static int uvesafb_open(struct fb_info *info, int user)
1162{
1163 struct uvesafb_par *par = info->par;
1164 int cnt = atomic_read(&par->ref_count);
c2bc0a75 1165 u8 *buf = NULL;
8bdb3a2d 1166
c2bc0a75
WY		 1167 if (!cnt && par->vbe_state_size) {
1168 buf = uvesafb_vbe_state_save(par);
1169 if (IS_ERR(buf)) {
a8feae09
JP		 1170 pr_warn("save hardware state failed, error code is %ld!\n",
1171 PTR_ERR(buf));
c2bc0a75
WY		 1172 } else {
1173 par->vbe_state_orig = buf;
1174 }
1175 }
8bdb3a2d
MJ		 1176
1177 atomic_inc(&par->ref_count);
1178 return 0;
1179}
1180
1181static int uvesafb_release(struct fb_info *info, int user)
1182{
1183 struct uvesafb_ktask *task = NULL;
1184 struct uvesafb_par *par = info->par;
1185 int cnt = atomic_read(&par->ref_count);
1186
1187 if (!cnt)
1188 return -EINVAL;
1189
1190 if (cnt != 1)
1191 goto out;
1192
1193 task = uvesafb_prep();
1194 if (!task)
1195 goto out;
1196
1197 /* First, try to set the standard 80x25 text mode. */
1198 task->t.regs.eax = 0x0003;
1199 uvesafb_exec(task);
1200
1201 /*
1202 * Now try to restore whatever hardware state we might have
1203 * saved when the fb device was first opened.
1204 */
1205 uvesafb_vbe_state_restore(par, par->vbe_state_orig);
1206out:
1207 atomic_dec(&par->ref_count);
e87d9f29 1208 uvesafb_free(task);
8bdb3a2d
MJ		 1209 return 0;
1210}
1211
1212static int uvesafb_set_par(struct fb_info *info)
1213{
1214 struct uvesafb_par *par = info->par;
1215 struct uvesafb_ktask *task = NULL;
1216 struct vbe_crtc_ib *crtc = NULL;
1217 struct vbe_mode_ib *mode = NULL;
1218 int i, err = 0, depth = info->var.bits_per_pixel;
1219
1220 if (depth > 8 && depth != 32)
1221 depth = info->var.red.length + info->var.green.length +
1222 info->var.blue.length;
1223
1224 i = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, depth,
1225 UVESAFB_EXACT_RES | UVESAFB_EXACT_DEPTH);
1226 if (i >= 0)
1227 mode = &par->vbe_modes[i];
1228 else
1229 return -EINVAL;
1230
1231 task = uvesafb_prep();
1232 if (!task)
1233 return -ENOMEM;
1234setmode:
1235 task->t.regs.eax = 0x4f02;
1236 task->t.regs.ebx = mode->mode_id | 0x4000; /* use LFB */
1237
1238 if (par->vbe_ib.vbe_version >= 0x0300 && !par->nocrtc &&
1239 info->var.pixclock != 0) {
1240 task->t.regs.ebx |= 0x0800; /* use CRTC data */
1241 task->t.flags = TF_BUF_ESDI;
1242 crtc = kzalloc(sizeof(struct vbe_crtc_ib), GFP_KERNEL);
1243 if (!crtc) {
1244 err = -ENOMEM;
1245 goto out;
1246 }
1247 crtc->horiz_start = info->var.xres + info->var.right_margin;
1248 crtc->horiz_end = crtc->horiz_start + info->var.hsync_len;
1249 crtc->horiz_total = crtc->horiz_end + info->var.left_margin;
1250
1251 crtc->vert_start = info->var.yres + info->var.lower_margin;
1252 crtc->vert_end = crtc->vert_start + info->var.vsync_len;
1253 crtc->vert_total = crtc->vert_end + info->var.upper_margin;
1254
1255 crtc->pixel_clock = PICOS2KHZ(info->var.pixclock) * 1000;
1256 crtc->refresh_rate = (u16)(100 * (crtc->pixel_clock /
1257 (crtc->vert_total * crtc->horiz_total)));
1258
1259 if (info->var.vmode & FB_VMODE_DOUBLE)
1260 crtc->flags |= 0x1;
1261 if (info->var.vmode & FB_VMODE_INTERLACED)
1262 crtc->flags |= 0x2;
1263 if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
1264 crtc->flags |= 0x4;
1265 if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
1266 crtc->flags |= 0x8;
1267 memcpy(&par->crtc, crtc, sizeof(*crtc));
1268 } else {
1269 memset(&par->crtc, 0, sizeof(*crtc));
1270 }
1271
1272 task->t.buf_len = sizeof(struct vbe_crtc_ib);
1273 task->buf = &par->crtc;
1274
1275 err = uvesafb_exec(task);
1276 if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
1277 /*
1278 * The mode switch might have failed because we tried to
1279 * use our own timings. Try again with the default timings.
1280 */
1281 if (crtc != NULL) {
a8feae09
JP		 1282 pr_warn("mode switch failed (eax=0x%x, err=%d) - trying again with default timings\n",
1283 task->t.regs.eax, err);
8bdb3a2d
MJ		 1284 uvesafb_reset(task);
1285 kfree(crtc);
1286 crtc = NULL;
1287 info->var.pixclock = 0;
1288 goto setmode;
1289 } else {
a8feae09
JP		 1290 pr_err("mode switch failed (eax=0x%x, err=%d)\n",
1291 task->t.regs.eax, err);
8bdb3a2d
MJ		 1292 err = -EINVAL;
1293 goto out;
1294 }
1295 }
1296 par->mode_idx = i;
1297
1298 /* For 8bpp modes, always try to set the DAC to 8 bits. */
1299 if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC &&
1300 mode->bits_per_pixel <= 8) {
1301 uvesafb_reset(task);
1302 task->t.regs.eax = 0x4f08;
1303 task->t.regs.ebx = 0x0800;
1304
1305 err = uvesafb_exec(task);
1306 if (err || (task->t.regs.eax & 0xffff) != 0x004f ||
1307 ((task->t.regs.ebx & 0xff00) >> 8) != 8) {
0ca1071f
MJ		 1308 dac_width = 6;
1309 } else {
1310 dac_width = 8;
8bdb3a2d
MJ		 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
b1dfee60
SK		 1318out:
1319 kfree(crtc);
8bdb3a2d
MJ		 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
8bdb3a2d
MJ		 1411static struct fb_ops uvesafb_ops = {
1412 .owner = THIS_MODULE,
1413 .fb_open = uvesafb_open,
1414 .fb_release = uvesafb_release,
1415 .fb_setcolreg = uvesafb_setcolreg,
1416 .fb_setcmap = uvesafb_setcmap,
1417 .fb_pan_display = uvesafb_pan_display,
1418 .fb_blank = uvesafb_blank,
1419 .fb_fillrect = cfb_fillrect,
1420 .fb_copyarea = cfb_copyarea,
1421 .fb_imageblit = cfb_imageblit,
1422 .fb_check_var = uvesafb_check_var,
1423 .fb_set_par = uvesafb_set_par,
8bdb3a2d
MJ		 1424};
1425
48c68c4f 1426static void uvesafb_init_info(struct fb_info *info, struct vbe_mode_ib *mode)
8bdb3a2d
MJ		 1427{
1428 unsigned int size_vmode;
1429 unsigned int size_remap;
1430 unsigned int size_total;
1431 struct uvesafb_par *par = info->par;
1432 int i, h;
1433
1434 info->pseudo_palette = ((u8 *)info->par + sizeof(struct uvesafb_par));
1435 info->fix = uvesafb_fix;
1436 info->fix.ypanstep = par->ypan ? 1 : 0;
1437 info->fix.ywrapstep = (par->ypan > 1) ? 1 : 0;
1438
8bdb3a2d
MJ		 1439 /* Disable blanking if the user requested so. */
1440 if (!blank)
1441 info->fbops->fb_blank = NULL;
1442
1443 /*
1444 * Find out how much IO memory is required for the mode with
1445 * the highest resolution.
1446 */
1447 size_remap = 0;
1448 for (i = 0; i < par->vbe_modes_cnt; i++) {
1449 h = par->vbe_modes[i].bytes_per_scan_line *
1450 par->vbe_modes[i].y_res;
1451 if (h > size_remap)
1452 size_remap = h;
1453 }
1454 size_remap *= 2;
1455
1456 /*
1457 * size_vmode -- that is the amount of memory needed for the
1458 * used video mode, i.e. the minimum amount of
1459 * memory we need.
1460 */
92559977 1461 size_vmode = info->var.yres * mode->bytes_per_scan_line;
8bdb3a2d
MJ		 1462
1463 /*
1464 * size_total -- all video memory we have. Used for mtrr
1465 * entries, resource allocation and bounds
1466 * checking.
1467 */
1468 size_total = par->vbe_ib.total_memory * 65536;
1469 if (vram_total)
1470 size_total = vram_total * 1024 * 1024;
1471 if (size_total < size_vmode)
1472 size_total = size_vmode;
1473
1474 /*
1475 * size_remap -- the amount of video memory we are going to
1476 * use for vesafb. With modern cards it is no
1477 * option to simply use size_total as th
1478 * wastes plenty of kernel address space.
1479 */
1480 if (vram_remap)
1481 size_remap = vram_remap * 1024 * 1024;
1482 if (size_remap < size_vmode)
1483 size_remap = size_vmode;
1484 if (size_remap > size_total)
1485 size_remap = size_total;
1486
1487 info->fix.smem_len = size_remap;
1488 info->fix.smem_start = mode->phys_base_ptr;
1489
1490 /*
1491 * We have to set yres_virtual here because when setup_var() was
1492 * called, smem_len wasn't defined yet.
1493 */
1494 info->var.yres_virtual = info->fix.smem_len /
1495 mode->bytes_per_scan_line;
1496
1497 if (par->ypan && info->var.yres_virtual > info->var.yres) {
a8feae09 1498 pr_info("scrolling: %s using protected mode interface, yres_virtual=%d\n",
8bdb3a2d
MJ		 1499 (par->ypan > 1) ? "ywrap" : "ypan",
1500 info->var.yres_virtual);
1501 } else {
a8feae09 1502 pr_info("scrolling: redraw\n");
8bdb3a2d
MJ		 1503 info->var.yres_virtual = info->var.yres;
1504 par->ypan = 0;
1505 }
1506
1507 info->flags = FBINFO_FLAG_DEFAULT |
1cc9fb6d 1508 (par->ypan ? FBINFO_HWACCEL_YPAN : 0);
8bdb3a2d
MJ		 1509
1510 if (!par->ypan)
1511 info->fbops->fb_pan_display = NULL;
1512}
1513
48c68c4f 1514static void uvesafb_init_mtrr(struct fb_info *info)
8bdb3a2d 1515{
63e28a7a
AL		 1516 struct uvesafb_par *par = info->par;
1517
8bdb3a2d
MJ		 1518 if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) {
1519 int temp_size = info->fix.smem_len;
8bdb3a2d 1520
63e28a7a 1521 int rc;
8bdb3a2d 1522
63e28a7a
AL		 1523 /* Find the largest power-of-two */
1524 temp_size = roundup_pow_of_two(temp_size);
8bdb3a2d 1525
63e28a7a
AL		 1526 /* Try and find a power of two to add */
1527 do {
1528 rc = arch_phys_wc_add(info->fix.smem_start, temp_size);
1529 temp_size >>= 1;
1530 } while (temp_size >= PAGE_SIZE && rc == -EINVAL);
8bdb3a2d 1531
63e28a7a
AL		 1532 if (rc >= 0)
1533 par->mtrr_handle = rc;
8bdb3a2d 1534 }
8bdb3a2d
MJ		 1535}
1536
48c68c4f 1537static void uvesafb_ioremap(struct fb_info *info)
803a4e14 1538{
63e28a7a 1539 info->screen_base = ioremap_wc(info->fix.smem_start, info->fix.smem_len);
803a4e14 1540}
8bdb3a2d
MJ		 1541
1542static ssize_t uvesafb_show_vbe_ver(struct device *dev,
1543 struct device_attribute *attr, char *buf)
1544{
1545 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1546 struct uvesafb_par *par = info->par;
1547
1548 return snprintf(buf, PAGE_SIZE, "%.4x\n", par->vbe_ib.vbe_version);
1549}
1550
1551static DEVICE_ATTR(vbe_version, S_IRUGO, uvesafb_show_vbe_ver, NULL);
1552
1553static ssize_t uvesafb_show_vbe_modes(struct device *dev,
1554 struct device_attribute *attr, char *buf)
1555{
1556 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1557 struct uvesafb_par *par = info->par;
1558 int ret = 0, i;
1559
1560 for (i = 0; i < par->vbe_modes_cnt && ret < PAGE_SIZE; i++) {
1561 ret += snprintf(buf + ret, PAGE_SIZE - ret,
1562 "%dx%d-%d, 0x%.4x\n",
1563 par->vbe_modes[i].x_res, par->vbe_modes[i].y_res,
1564 par->vbe_modes[i].depth, par->vbe_modes[i].mode_id);
1565 }
1566
1567 return ret;
1568}
1569
1570static DEVICE_ATTR(vbe_modes, S_IRUGO, uvesafb_show_vbe_modes, NULL);
1571
1572static ssize_t uvesafb_show_vendor(struct device *dev,
1573 struct device_attribute *attr, char *buf)
1574{
1575 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1576 struct uvesafb_par *par = info->par;
1577
1578 if (par->vbe_ib.oem_vendor_name_ptr)
1579 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1580 (&par->vbe_ib) + par->vbe_ib.oem_vendor_name_ptr);
1581 else
1582 return 0;
1583}
1584
1585static DEVICE_ATTR(oem_vendor, S_IRUGO, uvesafb_show_vendor, NULL);
1586
1587static ssize_t uvesafb_show_product_name(struct device *dev,
1588 struct device_attribute *attr, char *buf)
1589{
1590 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1591 struct uvesafb_par *par = info->par;
1592
1593 if (par->vbe_ib.oem_product_name_ptr)
1594 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1595 (&par->vbe_ib) + par->vbe_ib.oem_product_name_ptr);
1596 else
1597 return 0;
1598}
1599
1600static DEVICE_ATTR(oem_product_name, S_IRUGO, uvesafb_show_product_name, NULL);
1601
1602static ssize_t uvesafb_show_product_rev(struct device *dev,
1603 struct device_attribute *attr, char *buf)
1604{
1605 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1606 struct uvesafb_par *par = info->par;
1607
1608 if (par->vbe_ib.oem_product_rev_ptr)
1609 return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
1610 (&par->vbe_ib) + par->vbe_ib.oem_product_rev_ptr);
1611 else
1612 return 0;
1613}
1614
1615static DEVICE_ATTR(oem_product_rev, S_IRUGO, uvesafb_show_product_rev, NULL);
1616
1617static ssize_t uvesafb_show_oem_string(struct device *dev,
1618 struct device_attribute *attr, char *buf)
1619{
1620 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1621 struct uvesafb_par *par = info->par;
1622
1623 if (par->vbe_ib.oem_string_ptr)
1624 return snprintf(buf, PAGE_SIZE, "%s\n",
1625 (char *)(&par->vbe_ib) + par->vbe_ib.oem_string_ptr);
1626 else
1627 return 0;
1628}
1629
1630static DEVICE_ATTR(oem_string, S_IRUGO, uvesafb_show_oem_string, NULL);
1631
1632static ssize_t uvesafb_show_nocrtc(struct device *dev,
1633 struct device_attribute *attr, char *buf)
1634{
1635 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1636 struct uvesafb_par *par = info->par;
1637
1638 return snprintf(buf, PAGE_SIZE, "%d\n", par->nocrtc);
1639}
1640
1641static ssize_t uvesafb_store_nocrtc(struct device *dev,
1642 struct device_attribute *attr, const char *buf, size_t count)
1643{
1644 struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
1645 struct uvesafb_par *par = info->par;
1646
1647 if (count > 0) {
1648 if (buf[0] == '0')
1649 par->nocrtc = 0;
1650 else
1651 par->nocrtc = 1;
1652 }
1653 return count;
1654}
1655
1656static DEVICE_ATTR(nocrtc, S_IRUGO | S_IWUSR, uvesafb_show_nocrtc,
1657 uvesafb_store_nocrtc);
1658
1659static struct attribute *uvesafb_dev_attrs[] = {
1660 &dev_attr_vbe_version.attr,
1661 &dev_attr_vbe_modes.attr,
1662 &dev_attr_oem_vendor.attr,
1663 &dev_attr_oem_product_name.attr,
1664 &dev_attr_oem_product_rev.attr,
1665 &dev_attr_oem_string.attr,
1666 &dev_attr_nocrtc.attr,
1667 NULL,
1668};
1669
884e4960 1670static const struct attribute_group uvesafb_dev_attgrp = {
8bdb3a2d
MJ		 1671 .name = NULL,
1672 .attrs = uvesafb_dev_attrs,
1673};
1674
48c68c4f 1675static int uvesafb_probe(struct platform_device *dev)
8bdb3a2d
MJ		 1676{
1677 struct fb_info *info;
1678 struct vbe_mode_ib *mode = NULL;
1679 struct uvesafb_par *par;
1680 int err = 0, i;
1681
1682 info = framebuffer_alloc(sizeof(*par) + sizeof(u32) * 256, &dev->dev);
1683 if (!info)
1684 return -ENOMEM;
1685
1686 par = info->par;
1687
1688 err = uvesafb_vbe_init(info);
1689 if (err) {
a8feae09 1690 pr_err("vbe_init() failed with %d\n", err);
8bdb3a2d
MJ		 1691 goto out;
1692 }
1693
1694 info->fbops = &uvesafb_ops;
1695
1696 i = uvesafb_vbe_init_mode(info);
1697 if (i < 0) {
1698 err = -EINVAL;
1699 goto out;
1700 } else {
1701 mode = &par->vbe_modes[i];
1702 }
1703
1704 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
1705 err = -ENXIO;
1706 goto out;
1707 }
1708
1709 uvesafb_init_info(info, mode);
1710
803a4e14 1711 if (!request_region(0x3c0, 32, "uvesafb")) {
a8feae09 1712 pr_err("request region 0x3c0-0x3e0 failed\n");
803a4e14
TS		 1713 err = -EIO;
1714 goto out_mode;
1715 }
1716
8bdb3a2d
MJ		 1717 if (!request_mem_region(info->fix.smem_start, info->fix.smem_len,
1718 "uvesafb")) {
a8feae09
JP		 1719 pr_err("cannot reserve video memory at 0x%lx\n",
1720 info->fix.smem_start);
8bdb3a2d 1721 err = -EIO;
803a4e14 1722 goto out_reg;
8bdb3a2d
MJ		 1723 }
1724
803a4e14
TS		 1725 uvesafb_init_mtrr(info);
1726 uvesafb_ioremap(info);
8bdb3a2d
MJ		 1727
1728 if (!info->screen_base) {
a8feae09
JP		 1729 pr_err("abort, cannot ioremap 0x%x bytes of video memory at 0x%lx\n",
1730 info->fix.smem_len, info->fix.smem_start);
8bdb3a2d
MJ		 1731 err = -EIO;
1732 goto out_mem;
1733 }
1734
8bdb3a2d
MJ		 1735 platform_set_drvdata(dev, info);
1736
1737 if (register_framebuffer(info) < 0) {
a8feae09 1738 pr_err("failed to register framebuffer device\n");
8bdb3a2d 1739 err = -EINVAL;
803a4e14 1740 goto out_unmap;
8bdb3a2d
MJ		 1741 }
1742
a8feae09
JP		 1743 pr_info("framebuffer at 0x%lx, mapped to 0x%p, using %dk, total %dk\n",
1744 info->fix.smem_start, info->screen_base,
1745 info->fix.smem_len / 1024, par->vbe_ib.total_memory * 64);
31b6780c 1746 fb_info(info, "%s frame buffer device\n", info->fix.id);
8bdb3a2d
MJ		 1747
1748 err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1749 if (err != 0)
31b6780c 1750 fb_warn(info, "failed to register attributes\n");
8bdb3a2d
MJ		 1751
1752 return 0;
1753
8bdb3a2d
MJ		 1754out_unmap:
1755 iounmap(info->screen_base);
1756out_mem:
1757 release_mem_region(info->fix.smem_start, info->fix.smem_len);
803a4e14
TS		 1758out_reg:
1759 release_region(0x3c0, 32);
8bdb3a2d
MJ		 1760out_mode:
1761 if (!list_empty(&info->modelist))
1762 fb_destroy_modelist(&info->modelist);
1763 fb_destroy_modedb(info->monspecs.modedb);
1764 fb_dealloc_cmap(&info->cmap);
1765out:
b1dfee60 1766 kfree(par->vbe_modes);
8bdb3a2d
MJ		 1767
1768 framebuffer_release(info);
1769 return err;
1770}
1771
1772static int uvesafb_remove(struct platform_device *dev)
1773{
1774 struct fb_info *info = platform_get_drvdata(dev);
1775
1776 if (info) {
1777 struct uvesafb_par *par = info->par;
1778
1779 sysfs_remove_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
1780 unregister_framebuffer(info);
1781 release_region(0x3c0, 32);
1782 iounmap(info->screen_base);
63e28a7a 1783 arch_phys_wc_del(par->mtrr_handle);
8bdb3a2d
MJ		 1784 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1785 fb_destroy_modedb(info->monspecs.modedb);
1786 fb_dealloc_cmap(&info->cmap);
1787
a57aa93f
WY		 1788 kfree(par->vbe_modes);
1789 kfree(par->vbe_state_orig);
1790 kfree(par->vbe_state_saved);
8bdb3a2d
MJ		 1791
1792 framebuffer_release(info);
1793 }
1794 return 0;
1795}
1796
1797static struct platform_driver uvesafb_driver = {
1798 .probe = uvesafb_probe,
1799 .remove = uvesafb_remove,
1800 .driver = {
1801 .name = "uvesafb",
1802 },
1803};
1804
1805static struct platform_device *uvesafb_device;
1806
1807#ifndef MODULE
48c68c4f 1808static int uvesafb_setup(char *options)
8bdb3a2d
MJ		 1809{
1810 char *this_opt;
1811
1812 if (!options || !*options)
1813 return 0;
1814
1815 while ((this_opt = strsep(&options, ",")) != NULL) {
1816 if (!*this_opt) continue;
1817
1818 if (!strcmp(this_opt, "redraw"))
1819 ypan = 0;
1820 else if (!strcmp(this_opt, "ypan"))
1821 ypan = 1;
1822 else if (!strcmp(this_opt, "ywrap"))
1823 ypan = 2;
1824 else if (!strcmp(this_opt, "vgapal"))
1825 pmi_setpal = 0;
1826 else if (!strcmp(this_opt, "pmipal"))
1827 pmi_setpal = 1;
1828 else if (!strncmp(this_opt, "mtrr:", 5))
1829 mtrr = simple_strtoul(this_opt+5, NULL, 0);
1830 else if (!strcmp(this_opt, "nomtrr"))
1831 mtrr = 0;
1832 else if (!strcmp(this_opt, "nocrtc"))
1833 nocrtc = 1;
1834 else if (!strcmp(this_opt, "noedid"))
1835 noedid = 1;
1836 else if (!strcmp(this_opt, "noblank"))
1837 blank = 0;
1838 else if (!strncmp(this_opt, "vtotal:", 7))
1839 vram_total = simple_strtoul(this_opt + 7, NULL, 0);
1840 else if (!strncmp(this_opt, "vremap:", 7))
1841 vram_remap = simple_strtoul(this_opt + 7, NULL, 0);
1842 else if (!strncmp(this_opt, "maxhf:", 6))
1843 maxhf = simple_strtoul(this_opt + 6, NULL, 0);
1844 else if (!strncmp(this_opt, "maxvf:", 6))
1845 maxvf = simple_strtoul(this_opt + 6, NULL, 0);
1846 else if (!strncmp(this_opt, "maxclk:", 7))
1847 maxclk = simple_strtoul(this_opt + 7, NULL, 0);
1848 else if (!strncmp(this_opt, "vbemode:", 8))
1849 vbemode = simple_strtoul(this_opt + 8, NULL, 0);
1850 else if (this_opt[0] >= '0' && this_opt[0] <= '9') {
1851 mode_option = this_opt;
1852 } else {
a8feae09 1853 pr_warn("unrecognized option %s\n", this_opt);
8bdb3a2d
MJ		 1854 }
1855 }
1856
d1ce3d54 1857 if (mtrr != 3 && mtrr != 0)
63e28a7a
AL		 1858 pr_warn("uvesafb: mtrr should be set to 0 or 3; %d is unsupported", mtrr);
1859
8bdb3a2d
MJ		 1860 return 0;
1861}
1862#endif /* !MODULE */
1863
b5f0dc7b 1864static ssize_t v86d_show(struct device_driver *dev, char *buf)
8bdb3a2d
MJ		 1865{
1866 return snprintf(buf, PAGE_SIZE, "%s\n", v86d_path);
1867}
1868
b5f0dc7b 1869static ssize_t v86d_store(struct device_driver *dev, const char *buf,
8bdb3a2d
MJ		 1870 size_t count)
1871{
1872 strncpy(v86d_path, buf, PATH_MAX);
1873 return count;
1874}
b5f0dc7b 1875static DRIVER_ATTR_RW(v86d);
8bdb3a2d 1876
48c68c4f 1877static int uvesafb_init(void)
8bdb3a2d
MJ		 1878{
1879 int err;
1880
1881#ifndef MODULE
1882 char *option = NULL;
1883
1884 if (fb_get_options("uvesafb", &option))
1885 return -ENODEV;
1886 uvesafb_setup(option);
1887#endif
1888 err = cn_add_callback(&uvesafb_cn_id, "uvesafb", uvesafb_cn_callback);
1889 if (err)
1890 return err;
1891
1892 err = platform_driver_register(&uvesafb_driver);
1893
1894 if (!err) {
1895 uvesafb_device = platform_device_alloc("uvesafb", 0);
1896 if (uvesafb_device)
1897 err = platform_device_add(uvesafb_device);
1898 else
1899 err = -ENOMEM;
1900
1901 if (err) {
34685627 1902 platform_device_put(uvesafb_device);
8bdb3a2d
MJ		 1903 platform_driver_unregister(&uvesafb_driver);
1904 cn_del_callback(&uvesafb_cn_id);
1905 return err;
1906 }
1907
1908 err = driver_create_file(&uvesafb_driver.driver,
1909 &driver_attr_v86d);
1910 if (err) {
a8feae09 1911 pr_warn("failed to register attributes\n");
8bdb3a2d
MJ		 1912 err = 0;
1913 }
1914 }
1915 return err;
1916}
1917
1918module_init(uvesafb_init);
1919
48c68c4f 1920static void uvesafb_exit(void)
8bdb3a2d
MJ		 1921{
1922 struct uvesafb_ktask *task;
1923
1924 if (v86d_started) {
1925 task = uvesafb_prep();
1926 if (task) {
1927 task->t.flags = TF_EXIT;
1928 uvesafb_exec(task);
1929 uvesafb_free(task);
1930 }
1931 }
1932
1933 cn_del_callback(&uvesafb_cn_id);
1934 driver_remove_file(&uvesafb_driver.driver, &driver_attr_v86d);
1935 platform_device_unregister(uvesafb_device);
1936 platform_driver_unregister(&uvesafb_driver);
1937}
1938
1939module_exit(uvesafb_exit);
1940
9bbb9e5a 1941static int param_set_scroll(const char *val, const struct kernel_param *kp)
8bdb3a2d
MJ		 1942{
1943 ypan = 0;
1944
1945 if (!strcmp(val, "redraw"))
1946 ypan = 0;
1947 else if (!strcmp(val, "ypan"))
1948 ypan = 1;
1949 else if (!strcmp(val, "ywrap"))
1950 ypan = 2;
2ead9439
RR		 1951 else
1952 return -EINVAL;
8bdb3a2d
MJ		 1953
1954 return 0;
1955}
9c27847d 1956static const struct kernel_param_ops param_ops_scroll = {
9bbb9e5a
RR		 1957 .set = param_set_scroll,
1958};
5eb03a4a 1959#define param_check_scroll(name, p) __param_check(name, p, void)
8bdb3a2d
MJ		 1960
1961module_param_named(scroll, ypan, scroll, 0);
1962MODULE_PARM_DESC(scroll,
5eb03a4a 1963 "Scrolling mode, set to 'redraw', 'ypan', or 'ywrap'");
8bdb3a2d
MJ		 1964module_param_named(vgapal, pmi_setpal, invbool, 0);
1965MODULE_PARM_DESC(vgapal, "Set palette using VGA registers");
1966module_param_named(pmipal, pmi_setpal, bool, 0);
1967MODULE_PARM_DESC(pmipal, "Set palette using PMI calls");
1968module_param(mtrr, uint, 0);
1969MODULE_PARM_DESC(mtrr,
1970 "Memory Type Range Registers setting. Use 0 to disable.");
1971module_param(blank, bool, 0);
1972MODULE_PARM_DESC(blank, "Enable hardware blanking");
1973module_param(nocrtc, bool, 0);
1974MODULE_PARM_DESC(nocrtc, "Ignore CRTC timings when setting modes");
1975module_param(noedid, bool, 0);
1976MODULE_PARM_DESC(noedid,
1977 "Ignore EDID-provided monitor limits when setting modes");
1978module_param(vram_remap, uint, 0);
1979MODULE_PARM_DESC(vram_remap, "Set amount of video memory to be used [MiB]");
1980module_param(vram_total, uint, 0);
1981MODULE_PARM_DESC(vram_total, "Set total amount of video memoery [MiB]");
1982module_param(maxclk, ushort, 0);
1983MODULE_PARM_DESC(maxclk, "Maximum pixelclock [MHz], overrides EDID data");
1984module_param(maxhf, ushort, 0);
1985MODULE_PARM_DESC(maxhf,
1986 "Maximum horizontal frequency [kHz], overrides EDID data");
1987module_param(maxvf, ushort, 0);
1988MODULE_PARM_DESC(maxvf,
1989 "Maximum vertical frequency [Hz], overrides EDID data");
012e2609
KH		 1990module_param(mode_option, charp, 0);
1991MODULE_PARM_DESC(mode_option,
8bdb3a2d
MJ		 1992 "Specify initial video mode as \"<xres>x<yres>[-<bpp>][@<refresh>]\"");
1993module_param(vbemode, ushort, 0);
1994MODULE_PARM_DESC(vbemode,
1995 "VBE mode number to set, overrides the 'mode' option");
1996module_param_string(v86d, v86d_path, PATH_MAX, 0660);
1997MODULE_PARM_DESC(v86d, "Path to the v86d userspace helper.");
1998
1999MODULE_LICENSE("GPL");
2000MODULE_AUTHOR("Michal Januszewski <spock@gentoo.org>");
2001MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards");
2002
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