Root/
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 | #ifdef CONFIG_MTRR |
28 | #include <asm/mtrr.h> |
29 | #endif |
30 | #include "edid.h" |
31 | |
32 | static struct cb_id uvesafb_cn_id = { |
33 | .idx = CN_IDX_V86D, |
34 | .val = CN_VAL_V86D_UVESAFB |
35 | }; |
36 | static char v86d_path[PATH_MAX] = "/sbin/v86d"; |
37 | static char v86d_started; /* has v86d been started by uvesafb? */ |
38 | |
39 | static struct fb_fix_screeninfo uvesafb_fix = { |
40 | .id = "VESA VGA", |
41 | .type = FB_TYPE_PACKED_PIXELS, |
42 | .accel = FB_ACCEL_NONE, |
43 | .visual = FB_VISUAL_TRUECOLOR, |
44 | }; |
45 | |
46 | static int mtrr = 3; /* enable mtrr by default */ |
47 | static bool blank = 1; /* enable blanking by default */ |
48 | static int ypan = 1; /* 0: scroll, 1: ypan, 2: ywrap */ |
49 | static bool pmi_setpal = true; /* use PMI for palette changes */ |
50 | static bool nocrtc; /* ignore CRTC settings */ |
51 | static bool noedid; /* don't try DDC transfers */ |
52 | static int vram_remap; /* set amt. of memory to be used */ |
53 | static int vram_total; /* set total amount of memory */ |
54 | static u16 maxclk; /* maximum pixel clock */ |
55 | static u16 maxvf; /* maximum vertical frequency */ |
56 | static u16 maxhf; /* maximum horizontal frequency */ |
57 | static u16 vbemode; /* force use of a specific VBE mode */ |
58 | static char *mode_option; |
59 | static u8 dac_width = 6; |
60 | |
61 | static struct uvesafb_ktask *uvfb_tasks[UVESAFB_TASKS_MAX]; |
62 | static 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 | */ |
71 | static void uvesafb_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp) |
72 | { |
73 | struct uvesafb_task *utask; |
74 | struct uvesafb_ktask *task; |
75 | |
76 | if (!capable(CAP_SYS_ADMIN)) |
77 | return; |
78 | |
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 | |
111 | static 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 | |
124 | return call_usermodehelper(v86d_path, argv, envp, UMH_WAIT_PROC); |
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 | */ |
143 | static 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) { |
155 | printk(KERN_WARNING "uvesafb: message too long (%d), " |
156 | "can't execute task\n", (int)(sizeof(*m) + len)); |
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; |
169 | m->ack = random32(); |
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); |
188 | err = -EBUSY; |
189 | goto out; |
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 | |
196 | err = cn_netlink_send(m, 0, GFP_KERNEL); |
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) { |
204 | printk(KERN_ERR "uvesafb: failed to execute %s\n", |
205 | v86d_path); |
206 | printk(KERN_ERR "uvesafb: make sure that the v86d " |
207 | "helper is installed and executable\n"); |
208 | } else { |
209 | v86d_started = 1; |
210 | err = cn_netlink_send(m, 0, gfp_any()); |
211 | if (err == -ENOBUFS) |
212 | err = 0; |
213 | } |
214 | } else if (err == -ENOBUFS) |
215 | err = 0; |
216 | |
217 | if (!err && !(task->t.flags & TF_EXIT)) |
218 | err = !wait_for_completion_timeout(task->done, |
219 | msecs_to_jiffies(UVESAFB_TIMEOUT)); |
220 | |
221 | mutex_lock(&uvfb_lock); |
222 | uvfb_tasks[seq] = NULL; |
223 | mutex_unlock(&uvfb_lock); |
224 | |
225 | seq++; |
226 | if (seq >= UVESAFB_TASKS_MAX) |
227 | seq = 0; |
228 | out: |
229 | kfree(m); |
230 | return err; |
231 | } |
232 | |
233 | /* |
234 | * Free a uvesafb_ktask struct. |
235 | */ |
236 | static void uvesafb_free(struct uvesafb_ktask *task) |
237 | { |
238 | if (task) { |
239 | if (task->done) |
240 | kfree(task->done); |
241 | kfree(task); |
242 | } |
243 | } |
244 | |
245 | /* |
246 | * Prepare a uvesafb_ktask struct to be used again. |
247 | */ |
248 | static void uvesafb_reset(struct uvesafb_ktask *task) |
249 | { |
250 | struct completion *cpl = task->done; |
251 | |
252 | memset(task, 0, sizeof(*task)); |
253 | task->done = cpl; |
254 | } |
255 | |
256 | /* |
257 | * Allocate and prepare a uvesafb_ktask struct. |
258 | */ |
259 | static struct uvesafb_ktask *uvesafb_prep(void) |
260 | { |
261 | struct uvesafb_ktask *task; |
262 | |
263 | task = kzalloc(sizeof(*task), GFP_KERNEL); |
264 | if (task) { |
265 | task->done = kzalloc(sizeof(*task->done), GFP_KERNEL); |
266 | if (!task->done) { |
267 | kfree(task); |
268 | task = NULL; |
269 | } |
270 | } |
271 | return task; |
272 | } |
273 | |
274 | static void uvesafb_setup_var(struct fb_var_screeninfo *var, |
275 | struct fb_info *info, struct vbe_mode_ib *mode) |
276 | { |
277 | struct uvesafb_par *par = info->par; |
278 | |
279 | var->vmode = FB_VMODE_NONINTERLACED; |
280 | var->sync = FB_SYNC_VERT_HIGH_ACT; |
281 | |
282 | var->xres = mode->x_res; |
283 | var->yres = mode->y_res; |
284 | var->xres_virtual = mode->x_res; |
285 | var->yres_virtual = (par->ypan) ? |
286 | info->fix.smem_len / mode->bytes_per_scan_line : |
287 | mode->y_res; |
288 | var->xoffset = 0; |
289 | var->yoffset = 0; |
290 | var->bits_per_pixel = mode->bits_per_pixel; |
291 | |
292 | if (var->bits_per_pixel == 15) |
293 | var->bits_per_pixel = 16; |
294 | |
295 | if (var->bits_per_pixel > 8) { |
296 | var->red.offset = mode->red_off; |
297 | var->red.length = mode->red_len; |
298 | var->green.offset = mode->green_off; |
299 | var->green.length = mode->green_len; |
300 | var->blue.offset = mode->blue_off; |
301 | var->blue.length = mode->blue_len; |
302 | var->transp.offset = mode->rsvd_off; |
303 | var->transp.length = mode->rsvd_len; |
304 | } else { |
305 | var->red.offset = 0; |
306 | var->green.offset = 0; |
307 | var->blue.offset = 0; |
308 | var->transp.offset = 0; |
309 | |
310 | var->red.length = 8; |
311 | var->green.length = 8; |
312 | var->blue.length = 8; |
313 | var->transp.length = 0; |
314 | } |
315 | } |
316 | |
317 | static int uvesafb_vbe_find_mode(struct uvesafb_par *par, |
318 | int xres, int yres, int depth, unsigned char flags) |
319 | { |
320 | int i, match = -1, h = 0, d = 0x7fffffff; |
321 | |
322 | for (i = 0; i < par->vbe_modes_cnt; i++) { |
323 | h = abs(par->vbe_modes[i].x_res - xres) + |
324 | abs(par->vbe_modes[i].y_res - yres) + |
325 | abs(depth - par->vbe_modes[i].depth); |
326 | |
327 | /* |
328 | * We have an exact match in terms of resolution |
329 | * and depth. |
330 | */ |
331 | if (h == 0) |
332 | return i; |
333 | |
334 | if (h < d || (h == d && par->vbe_modes[i].depth > depth)) { |
335 | d = h; |
336 | match = i; |
337 | } |
338 | } |
339 | i = 1; |
340 | |
341 | if (flags & UVESAFB_EXACT_DEPTH && |
342 | par->vbe_modes[match].depth != depth) |
343 | i = 0; |
344 | |
345 | if (flags & UVESAFB_EXACT_RES && d > 24) |
346 | i = 0; |
347 | |
348 | if (i != 0) |
349 | return match; |
350 | else |
351 | return -1; |
352 | } |
353 | |
354 | static u8 *uvesafb_vbe_state_save(struct uvesafb_par *par) |
355 | { |
356 | struct uvesafb_ktask *task; |
357 | u8 *state; |
358 | int err; |
359 | |
360 | if (!par->vbe_state_size) |
361 | return NULL; |
362 | |
363 | state = kmalloc(par->vbe_state_size, GFP_KERNEL); |
364 | if (!state) |
365 | return ERR_PTR(-ENOMEM); |
366 | |
367 | task = uvesafb_prep(); |
368 | if (!task) { |
369 | kfree(state); |
370 | return NULL; |
371 | } |
372 | |
373 | task->t.regs.eax = 0x4f04; |
374 | task->t.regs.ecx = 0x000f; |
375 | task->t.regs.edx = 0x0001; |
376 | task->t.flags = TF_BUF_RET | TF_BUF_ESBX; |
377 | task->t.buf_len = par->vbe_state_size; |
378 | task->buf = state; |
379 | err = uvesafb_exec(task); |
380 | |
381 | if (err || (task->t.regs.eax & 0xffff) != 0x004f) { |
382 | printk(KERN_WARNING "uvesafb: VBE get state call " |
383 | "failed (eax=0x%x, err=%d)\n", |
384 | task->t.regs.eax, err); |
385 | kfree(state); |
386 | state = NULL; |
387 | } |
388 | |
389 | uvesafb_free(task); |
390 | return state; |
391 | } |
392 | |
393 | static void uvesafb_vbe_state_restore(struct uvesafb_par *par, u8 *state_buf) |
394 | { |
395 | struct uvesafb_ktask *task; |
396 | int err; |
397 | |
398 | if (!state_buf) |
399 | return; |
400 | |
401 | task = uvesafb_prep(); |
402 | if (!task) |
403 | return; |
404 | |
405 | task->t.regs.eax = 0x4f04; |
406 | task->t.regs.ecx = 0x000f; |
407 | task->t.regs.edx = 0x0002; |
408 | task->t.buf_len = par->vbe_state_size; |
409 | task->t.flags = TF_BUF_ESBX; |
410 | task->buf = state_buf; |
411 | |
412 | err = uvesafb_exec(task); |
413 | if (err || (task->t.regs.eax & 0xffff) != 0x004f) |
414 | printk(KERN_WARNING "uvesafb: VBE state restore call " |
415 | "failed (eax=0x%x, err=%d)\n", |
416 | task->t.regs.eax, err); |
417 | |
418 | uvesafb_free(task); |
419 | } |
420 | |
421 | static int uvesafb_vbe_getinfo(struct uvesafb_ktask *task, |
422 | struct uvesafb_par *par) |
423 | { |
424 | int err; |
425 | |
426 | task->t.regs.eax = 0x4f00; |
427 | task->t.flags = TF_VBEIB; |
428 | task->t.buf_len = sizeof(struct vbe_ib); |
429 | task->buf = &par->vbe_ib; |
430 | strncpy(par->vbe_ib.vbe_signature, "VBE2", 4); |
431 | |
432 | err = uvesafb_exec(task); |
433 | if (err || (task->t.regs.eax & 0xffff) != 0x004f) { |
434 | printk(KERN_ERR "uvesafb: Getting VBE info block failed " |
435 | "(eax=0x%x, err=%d)\n", (u32)task->t.regs.eax, |
436 | err); |
437 | return -EINVAL; |
438 | } |
439 | |
440 | if (par->vbe_ib.vbe_version < 0x0200) { |
441 | printk(KERN_ERR "uvesafb: Sorry, pre-VBE 2.0 cards are " |
442 | "not supported.\n"); |
443 | return -EINVAL; |
444 | } |
445 | |
446 | if (!par->vbe_ib.mode_list_ptr) { |
447 | printk(KERN_ERR "uvesafb: Missing mode list!\n"); |
448 | return -EINVAL; |
449 | } |
450 | |
451 | printk(KERN_INFO "uvesafb: "); |
452 | |
453 | /* |
454 | * Convert string pointers and the mode list pointer into |
455 | * usable addresses. Print informational messages about the |
456 | * video adapter and its vendor. |
457 | */ |
458 | if (par->vbe_ib.oem_vendor_name_ptr) |
459 | printk("%s, ", |
460 | ((char *)task->buf) + par->vbe_ib.oem_vendor_name_ptr); |
461 | |
462 | if (par->vbe_ib.oem_product_name_ptr) |
463 | printk("%s, ", |
464 | ((char *)task->buf) + par->vbe_ib.oem_product_name_ptr); |
465 | |
466 | if (par->vbe_ib.oem_product_rev_ptr) |
467 | printk("%s, ", |
468 | ((char *)task->buf) + par->vbe_ib.oem_product_rev_ptr); |
469 | |
470 | if (par->vbe_ib.oem_string_ptr) |
471 | printk("OEM: %s, ", |
472 | ((char *)task->buf) + par->vbe_ib.oem_string_ptr); |
473 | |
474 | printk("VBE v%d.%d\n", ((par->vbe_ib.vbe_version & 0xff00) >> 8), |
475 | par->vbe_ib.vbe_version & 0xff); |
476 | |
477 | return 0; |
478 | } |
479 | |
480 | static int uvesafb_vbe_getmodes(struct uvesafb_ktask *task, |
481 | struct uvesafb_par *par) |
482 | { |
483 | int off = 0, err; |
484 | u16 *mode; |
485 | |
486 | par->vbe_modes_cnt = 0; |
487 | |
488 | /* Count available modes. */ |
489 | mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr); |
490 | while (*mode != 0xffff) { |
491 | par->vbe_modes_cnt++; |
492 | mode++; |
493 | } |
494 | |
495 | par->vbe_modes = kzalloc(sizeof(struct vbe_mode_ib) * |
496 | par->vbe_modes_cnt, GFP_KERNEL); |
497 | if (!par->vbe_modes) |
498 | return -ENOMEM; |
499 | |
500 | /* Get info about all available modes. */ |
501 | mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr); |
502 | while (*mode != 0xffff) { |
503 | struct vbe_mode_ib *mib; |
504 | |
505 | uvesafb_reset(task); |
506 | task->t.regs.eax = 0x4f01; |
507 | task->t.regs.ecx = (u32) *mode; |
508 | task->t.flags = TF_BUF_RET | TF_BUF_ESDI; |
509 | task->t.buf_len = sizeof(struct vbe_mode_ib); |
510 | task->buf = par->vbe_modes + off; |
511 | |
512 | err = uvesafb_exec(task); |
513 | if (err || (task->t.regs.eax & 0xffff) != 0x004f) { |
514 | printk(KERN_WARNING "uvesafb: Getting mode info block " |
515 | "for mode 0x%x failed (eax=0x%x, err=%d)\n", |
516 | *mode, (u32)task->t.regs.eax, err); |
517 | mode++; |
518 | par->vbe_modes_cnt--; |
519 | continue; |
520 | } |
521 | |
522 | mib = task->buf; |
523 | mib->mode_id = *mode; |
524 | |
525 | /* |
526 | * We only want modes that are supported with the current |
527 | * hardware configuration, color, graphics and that have |
528 | * support for the LFB. |
529 | */ |
530 | if ((mib->mode_attr & VBE_MODE_MASK) == VBE_MODE_MASK && |
531 | mib->bits_per_pixel >= 8) |
532 | off++; |
533 | else |
534 | par->vbe_modes_cnt--; |
535 | |
536 | mode++; |
537 | mib->depth = mib->red_len + mib->green_len + mib->blue_len; |
538 | |
539 | /* |
540 | * Handle 8bpp modes and modes with broken color component |
541 | * lengths. |
542 | */ |
543 | if (mib->depth == 0 || (mib->depth == 24 && |
544 | mib->bits_per_pixel == 32)) |
545 | mib->depth = mib->bits_per_pixel; |
546 | } |
547 | |
548 | if (par->vbe_modes_cnt > 0) |
549 | return 0; |
550 | else |
551 | return -EINVAL; |
552 | } |
553 | |
554 | /* |
555 | * The Protected Mode Interface is 32-bit x86 code, so we only run it on |
556 | * x86 and not x86_64. |
557 | */ |
558 | #ifdef CONFIG_X86_32 |
559 | static int uvesafb_vbe_getpmi(struct uvesafb_ktask *task, |
560 | struct uvesafb_par *par) |
561 | { |
562 | int i, err; |
563 | |
564 | uvesafb_reset(task); |
565 | task->t.regs.eax = 0x4f0a; |
566 | task->t.regs.ebx = 0x0; |
567 | err = uvesafb_exec(task); |
568 | |
569 | if ((task->t.regs.eax & 0xffff) != 0x4f || task->t.regs.es < 0xc000) { |
570 | par->pmi_setpal = par->ypan = 0; |
571 | } else { |
572 | par->pmi_base = (u16 *)phys_to_virt(((u32)task->t.regs.es << 4) |
573 | + task->t.regs.edi); |
574 | par->pmi_start = (u8 *)par->pmi_base + par->pmi_base[1]; |
575 | par->pmi_pal = (u8 *)par->pmi_base + par->pmi_base[2]; |
576 | printk(KERN_INFO "uvesafb: protected mode interface info at " |
577 | "%04x:%04x\n", |
578 | (u16)task->t.regs.es, (u16)task->t.regs.edi); |
579 | printk(KERN_INFO "uvesafb: pmi: set display start = %p, " |
580 | "set palette = %p\n", par->pmi_start, |
581 | par->pmi_pal); |
582 | |
583 | if (par->pmi_base[3]) { |
584 | printk(KERN_INFO "uvesafb: pmi: ports = "); |
585 | for (i = par->pmi_base[3]/2; |
586 | par->pmi_base[i] != 0xffff; i++) |
587 | printk("%x ", par->pmi_base[i]); |
588 | printk("\n"); |
589 | |
590 | if (par->pmi_base[i] != 0xffff) { |
591 | printk(KERN_INFO "uvesafb: can't handle memory" |
592 | " requests, pmi disabled\n"); |
593 | par->ypan = par->pmi_setpal = 0; |
594 | } |
595 | } |
596 | } |
597 | return 0; |
598 | } |
599 | #endif /* CONFIG_X86_32 */ |
600 | |
601 | /* |
602 | * Check whether a video mode is supported by the Video BIOS and is |
603 | * compatible with the monitor limits. |
604 | */ |
605 | static int uvesafb_is_valid_mode(struct fb_videomode *mode, |
606 | struct fb_info *info) |
607 | { |
608 | if (info->monspecs.gtf) { |
609 | fb_videomode_to_var(&info->var, mode); |
610 | if (fb_validate_mode(&info->var, info)) |
611 | return 0; |
612 | } |
613 | |
614 | if (uvesafb_vbe_find_mode(info->par, mode->xres, mode->yres, 8, |
615 | UVESAFB_EXACT_RES) == -1) |
616 | return 0; |
617 | |
618 | return 1; |
619 | } |
620 | |
621 | static int uvesafb_vbe_getedid(struct uvesafb_ktask *task, struct fb_info *info) |
622 | { |
623 | struct uvesafb_par *par = info->par; |
624 | int err = 0; |
625 | |
626 | if (noedid || par->vbe_ib.vbe_version < 0x0300) |
627 | return -EINVAL; |
628 | |
629 | task->t.regs.eax = 0x4f15; |
630 | task->t.regs.ebx = 0; |
631 | task->t.regs.ecx = 0; |
632 | task->t.buf_len = 0; |
633 | task->t.flags = 0; |
634 | |
635 | err = uvesafb_exec(task); |
636 | |
637 | if ((task->t.regs.eax & 0xffff) != 0x004f || err) |
638 | return -EINVAL; |
639 | |
640 | if ((task->t.regs.ebx & 0x3) == 3) { |
641 | printk(KERN_INFO "uvesafb: VBIOS/hardware supports both " |
642 | "DDC1 and DDC2 transfers\n"); |
643 | } else if ((task->t.regs.ebx & 0x3) == 2) { |
644 | printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC2 " |
645 | "transfers\n"); |
646 | } else if ((task->t.regs.ebx & 0x3) == 1) { |
647 | printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC1 " |
648 | "transfers\n"); |
649 | } else { |
650 | printk(KERN_INFO "uvesafb: VBIOS/hardware doesn't support " |
651 | "DDC transfers\n"); |
652 | return -EINVAL; |
653 | } |
654 | |
655 | task->t.regs.eax = 0x4f15; |
656 | task->t.regs.ebx = 1; |
657 | task->t.regs.ecx = task->t.regs.edx = 0; |
658 | task->t.flags = TF_BUF_RET | TF_BUF_ESDI; |
659 | task->t.buf_len = EDID_LENGTH; |
660 | task->buf = kzalloc(EDID_LENGTH, GFP_KERNEL); |
661 | if (!task->buf) |
662 | return -ENOMEM; |
663 | |
664 | err = uvesafb_exec(task); |
665 | |
666 | if ((task->t.regs.eax & 0xffff) == 0x004f && !err) { |
667 | fb_edid_to_monspecs(task->buf, &info->monspecs); |
668 | |
669 | if (info->monspecs.vfmax && info->monspecs.hfmax) { |
670 | /* |
671 | * If the maximum pixel clock wasn't specified in |
672 | * the EDID block, set it to 300 MHz. |
673 | */ |
674 | if (info->monspecs.dclkmax == 0) |
675 | info->monspecs.dclkmax = 300 * 1000000; |
676 | info->monspecs.gtf = 1; |
677 | } |
678 | } else { |
679 | err = -EINVAL; |
680 | } |
681 | |
682 | kfree(task->buf); |
683 | return err; |
684 | } |
685 | |
686 | static void uvesafb_vbe_getmonspecs(struct uvesafb_ktask *task, |
687 | struct fb_info *info) |
688 | { |
689 | struct uvesafb_par *par = info->par; |
690 | int i; |
691 | |
692 | memset(&info->monspecs, 0, sizeof(info->monspecs)); |
693 | |
694 | /* |
695 | * If we don't get all necessary data from the EDID block, |
696 | * mark it as incompatible with the GTF and set nocrtc so |
697 | * that we always use the default BIOS refresh rate. |
698 | */ |
699 | if (uvesafb_vbe_getedid(task, info)) { |
700 | info->monspecs.gtf = 0; |
701 | par->nocrtc = 1; |
702 | } |
703 | |
704 | /* Kernel command line overrides. */ |
705 | if (maxclk) |
706 | info->monspecs.dclkmax = maxclk * 1000000; |
707 | if (maxvf) |
708 | info->monspecs.vfmax = maxvf; |
709 | if (maxhf) |
710 | info->monspecs.hfmax = maxhf * 1000; |
711 | |
712 | /* |
713 | * In case DDC transfers are not supported, the user can provide |
714 | * monitor limits manually. Lower limits are set to "safe" values. |
715 | */ |
716 | if (info->monspecs.gtf == 0 && maxclk && maxvf && maxhf) { |
717 | info->monspecs.dclkmin = 0; |
718 | info->monspecs.vfmin = 60; |
719 | info->monspecs.hfmin = 29000; |
720 | info->monspecs.gtf = 1; |
721 | par->nocrtc = 0; |
722 | } |
723 | |
724 | if (info->monspecs.gtf) |
725 | printk(KERN_INFO |
726 | "uvesafb: monitor limits: vf = %d Hz, hf = %d kHz, " |
727 | "clk = %d MHz\n", info->monspecs.vfmax, |
728 | (int)(info->monspecs.hfmax / 1000), |
729 | (int)(info->monspecs.dclkmax / 1000000)); |
730 | else |
731 | printk(KERN_INFO "uvesafb: no monitor limits have been set, " |
732 | "default refresh rate will be used\n"); |
733 | |
734 | /* Add VBE modes to the modelist. */ |
735 | for (i = 0; i < par->vbe_modes_cnt; i++) { |
736 | struct fb_var_screeninfo var; |
737 | struct vbe_mode_ib *mode; |
738 | struct fb_videomode vmode; |
739 | |
740 | mode = &par->vbe_modes[i]; |
741 | memset(&var, 0, sizeof(var)); |
742 | |
743 | var.xres = mode->x_res; |
744 | var.yres = mode->y_res; |
745 | |
746 | fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, &var, info); |
747 | fb_var_to_videomode(&vmode, &var); |
748 | fb_add_videomode(&vmode, &info->modelist); |
749 | } |
750 | |
751 | /* Add valid VESA modes to our modelist. */ |
752 | for (i = 0; i < VESA_MODEDB_SIZE; i++) { |
753 | if (uvesafb_is_valid_mode((struct fb_videomode *) |
754 | &vesa_modes[i], info)) |
755 | fb_add_videomode(&vesa_modes[i], &info->modelist); |
756 | } |
757 | |
758 | for (i = 0; i < info->monspecs.modedb_len; i++) { |
759 | if (uvesafb_is_valid_mode(&info->monspecs.modedb[i], info)) |
760 | fb_add_videomode(&info->monspecs.modedb[i], |
761 | &info->modelist); |
762 | } |
763 | |
764 | return; |
765 | } |
766 | |
767 | static void uvesafb_vbe_getstatesize(struct uvesafb_ktask *task, |
768 | struct uvesafb_par *par) |
769 | { |
770 | int err; |
771 | |
772 | uvesafb_reset(task); |
773 | |
774 | /* |
775 | * Get the VBE state buffer size. We want all available |
776 | * hardware state data (CL = 0x0f). |
777 | */ |
778 | task->t.regs.eax = 0x4f04; |
779 | task->t.regs.ecx = 0x000f; |
780 | task->t.regs.edx = 0x0000; |
781 | task->t.flags = 0; |
782 | |
783 | err = uvesafb_exec(task); |
784 | |
785 | if (err || (task->t.regs.eax & 0xffff) != 0x004f) { |
786 | printk(KERN_WARNING "uvesafb: VBE state buffer size " |
787 | "cannot be determined (eax=0x%x, err=%d)\n", |
788 | task->t.regs.eax, err); |
789 | par->vbe_state_size = 0; |
790 | return; |
791 | } |
792 | |
793 | par->vbe_state_size = 64 * (task->t.regs.ebx & 0xffff); |
794 | } |
795 | |
796 | static int uvesafb_vbe_init(struct fb_info *info) |
797 | { |
798 | struct uvesafb_ktask *task = NULL; |
799 | struct uvesafb_par *par = info->par; |
800 | int err; |
801 | |
802 | task = uvesafb_prep(); |
803 | if (!task) |
804 | return -ENOMEM; |
805 | |
806 | err = uvesafb_vbe_getinfo(task, par); |
807 | if (err) |
808 | goto out; |
809 | |
810 | err = uvesafb_vbe_getmodes(task, par); |
811 | if (err) |
812 | goto out; |
813 | |
814 | par->nocrtc = nocrtc; |
815 | #ifdef CONFIG_X86_32 |
816 | par->pmi_setpal = pmi_setpal; |
817 | par->ypan = ypan; |
818 | |
819 | if (par->pmi_setpal || par->ypan) { |
820 | if (__supported_pte_mask & _PAGE_NX) { |
821 | par->pmi_setpal = par->ypan = 0; |
822 | printk(KERN_WARNING "uvesafb: NX protection is actively." |
823 | "We have better not to use the PMI.\n"); |
824 | } else { |
825 | uvesafb_vbe_getpmi(task, par); |
826 | } |
827 | } |
828 | #else |
829 | /* The protected mode interface is not available on non-x86. */ |
830 | par->pmi_setpal = par->ypan = 0; |
831 | #endif |
832 | |
833 | INIT_LIST_HEAD(&info->modelist); |
834 | uvesafb_vbe_getmonspecs(task, info); |
835 | uvesafb_vbe_getstatesize(task, par); |
836 | |
837 | out: uvesafb_free(task); |
838 | return err; |
839 | } |
840 | |
841 | static int uvesafb_vbe_init_mode(struct fb_info *info) |
842 | { |
843 | struct list_head *pos; |
844 | struct fb_modelist *modelist; |
845 | struct fb_videomode *mode; |
846 | struct uvesafb_par *par = info->par; |
847 | int i, modeid; |
848 | |
849 | /* Has the user requested a specific VESA mode? */ |
850 | if (vbemode) { |
851 | for (i = 0; i < par->vbe_modes_cnt; i++) { |
852 | if (par->vbe_modes[i].mode_id == vbemode) { |
853 | modeid = i; |
854 | uvesafb_setup_var(&info->var, info, |
855 | &par->vbe_modes[modeid]); |
856 | fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, |
857 | &info->var, info); |
858 | /* |
859 | * With pixclock set to 0, the default BIOS |
860 | * timings will be used in set_par(). |
861 | */ |
862 | info->var.pixclock = 0; |
863 | goto gotmode; |
864 | } |
865 | } |
866 | printk(KERN_INFO "uvesafb: requested VBE mode 0x%x is " |
867 | "unavailable\n", vbemode); |
868 | vbemode = 0; |
869 | } |
870 | |
871 | /* Count the modes in the modelist */ |
872 | i = 0; |
873 | list_for_each(pos, &info->modelist) |
874 | i++; |
875 | |
876 | /* |
877 | * Convert the modelist into a modedb so that we can use it with |
878 | * fb_find_mode(). |
879 | */ |
880 | mode = kzalloc(i * sizeof(*mode), GFP_KERNEL); |
881 | if (mode) { |
882 | i = 0; |
883 | list_for_each(pos, &info->modelist) { |
884 | modelist = list_entry(pos, struct fb_modelist, list); |
885 | mode[i] = modelist->mode; |
886 | i++; |
887 | } |
888 | |
889 | if (!mode_option) |
890 | mode_option = UVESAFB_DEFAULT_MODE; |
891 | |
892 | i = fb_find_mode(&info->var, info, mode_option, mode, i, |
893 | NULL, 8); |
894 | |
895 | kfree(mode); |
896 | } |
897 | |
898 | /* fb_find_mode() failed */ |
899 | if (i == 0) { |
900 | info->var.xres = 640; |
901 | info->var.yres = 480; |
902 | mode = (struct fb_videomode *) |
903 | fb_find_best_mode(&info->var, &info->modelist); |
904 | |
905 | if (mode) { |
906 | fb_videomode_to_var(&info->var, mode); |
907 | } else { |
908 | modeid = par->vbe_modes[0].mode_id; |
909 | uvesafb_setup_var(&info->var, info, |
910 | &par->vbe_modes[modeid]); |
911 | fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, |
912 | &info->var, info); |
913 | |
914 | goto gotmode; |
915 | } |
916 | } |
917 | |
918 | /* Look for a matching VBE mode. */ |
919 | modeid = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, |
920 | info->var.bits_per_pixel, UVESAFB_EXACT_RES); |
921 | |
922 | if (modeid == -1) |
923 | return -EINVAL; |
924 | |
925 | uvesafb_setup_var(&info->var, info, &par->vbe_modes[modeid]); |
926 | |
927 | gotmode: |
928 | /* |
929 | * If we are not VBE3.0+ compliant, we're done -- the BIOS will |
930 | * ignore our timings anyway. |
931 | */ |
932 | if (par->vbe_ib.vbe_version < 0x0300 || par->nocrtc) |
933 | fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, |
934 | &info->var, info); |
935 | |
936 | return modeid; |
937 | } |
938 | |
939 | static int uvesafb_setpalette(struct uvesafb_pal_entry *entries, int count, |
940 | int start, struct fb_info *info) |
941 | { |
942 | struct uvesafb_ktask *task; |
943 | #ifdef CONFIG_X86 |
944 | struct uvesafb_par *par = info->par; |
945 | int i = par->mode_idx; |
946 | #endif |
947 | int err = 0; |
948 | |
949 | /* |
950 | * We support palette modifications for 8 bpp modes only, so |
951 | * there can never be more than 256 entries. |
952 | */ |
953 | if (start + count > 256) |
954 | return -EINVAL; |
955 | |
956 | #ifdef CONFIG_X86 |
957 | /* Use VGA registers if mode is VGA-compatible. */ |
958 | if (i >= 0 && i < par->vbe_modes_cnt && |
959 | par->vbe_modes[i].mode_attr & VBE_MODE_VGACOMPAT) { |
960 | for (i = 0; i < count; i++) { |
961 | outb_p(start + i, dac_reg); |
962 | outb_p(entries[i].red, dac_val); |
963 | outb_p(entries[i].green, dac_val); |
964 | outb_p(entries[i].blue, dac_val); |
965 | } |
966 | } |
967 | #ifdef CONFIG_X86_32 |
968 | else if (par->pmi_setpal) { |
969 | __asm__ __volatile__( |
970 | "call *(%%esi)" |
971 | : /* no return value */ |
972 | : "a" (0x4f09), /* EAX */ |
973 | "b" (0), /* EBX */ |
974 | "c" (count), /* ECX */ |
975 | "d" (start), /* EDX */ |
976 | "D" (entries), /* EDI */ |
977 | "S" (&par->pmi_pal)); /* ESI */ |
978 | } |
979 | #endif /* CONFIG_X86_32 */ |
980 | else |
981 | #endif /* CONFIG_X86 */ |
982 | { |
983 | task = uvesafb_prep(); |
984 | if (!task) |
985 | return -ENOMEM; |
986 | |
987 | task->t.regs.eax = 0x4f09; |
988 | task->t.regs.ebx = 0x0; |
989 | task->t.regs.ecx = count; |
990 | task->t.regs.edx = start; |
991 | task->t.flags = TF_BUF_ESDI; |
992 | task->t.buf_len = sizeof(struct uvesafb_pal_entry) * count; |
993 | task->buf = entries; |
994 | |
995 | err = uvesafb_exec(task); |
996 | if ((task->t.regs.eax & 0xffff) != 0x004f) |
997 | err = 1; |
998 | |
999 | uvesafb_free(task); |
1000 | } |
1001 | return err; |
1002 | } |
1003 | |
1004 | static int uvesafb_setcolreg(unsigned regno, unsigned red, unsigned green, |
1005 | unsigned blue, unsigned transp, |
1006 | struct fb_info *info) |
1007 | { |
1008 | struct uvesafb_pal_entry entry; |
1009 | int shift = 16 - dac_width; |
1010 | int err = 0; |
1011 | |
1012 | if (regno >= info->cmap.len) |
1013 | return -EINVAL; |
1014 | |
1015 | if (info->var.bits_per_pixel == 8) { |
1016 | entry.red = red >> shift; |
1017 | entry.green = green >> shift; |
1018 | entry.blue = blue >> shift; |
1019 | entry.pad = 0; |
1020 | |
1021 | err = uvesafb_setpalette(&entry, 1, regno, info); |
1022 | } else if (regno < 16) { |
1023 | switch (info->var.bits_per_pixel) { |
1024 | case 16: |
1025 | if (info->var.red.offset == 10) { |
1026 | /* 1:5:5:5 */ |
1027 | ((u32 *) (info->pseudo_palette))[regno] = |
1028 | ((red & 0xf800) >> 1) | |
1029 | ((green & 0xf800) >> 6) | |
1030 | ((blue & 0xf800) >> 11); |
1031 | } else { |
1032 | /* 0:5:6:5 */ |
1033 | ((u32 *) (info->pseudo_palette))[regno] = |
1034 | ((red & 0xf800) ) | |
1035 | ((green & 0xfc00) >> 5) | |
1036 | ((blue & 0xf800) >> 11); |
1037 | } |
1038 | break; |
1039 | |
1040 | case 24: |
1041 | case 32: |
1042 | red >>= 8; |
1043 | green >>= 8; |
1044 | blue >>= 8; |
1045 | ((u32 *)(info->pseudo_palette))[regno] = |
1046 | (red << info->var.red.offset) | |
1047 | (green << info->var.green.offset) | |
1048 | (blue << info->var.blue.offset); |
1049 | break; |
1050 | } |
1051 | } |
1052 | return err; |
1053 | } |
1054 | |
1055 | static int uvesafb_setcmap(struct fb_cmap *cmap, struct fb_info *info) |
1056 | { |
1057 | struct uvesafb_pal_entry *entries; |
1058 | int shift = 16 - dac_width; |
1059 | int i, err = 0; |
1060 | |
1061 | if (info->var.bits_per_pixel == 8) { |
1062 | if (cmap->start + cmap->len > info->cmap.start + |
1063 | info->cmap.len || cmap->start < info->cmap.start) |
1064 | return -EINVAL; |
1065 | |
1066 | entries = kmalloc(sizeof(*entries) * cmap->len, GFP_KERNEL); |
1067 | if (!entries) |
1068 | return -ENOMEM; |
1069 | |
1070 | for (i = 0; i < cmap->len; i++) { |
1071 | entries[i].red = cmap->red[i] >> shift; |
1072 | entries[i].green = cmap->green[i] >> shift; |
1073 | entries[i].blue = cmap->blue[i] >> shift; |
1074 | entries[i].pad = 0; |
1075 | } |
1076 | err = uvesafb_setpalette(entries, cmap->len, cmap->start, info); |
1077 | kfree(entries); |
1078 | } else { |
1079 | /* |
1080 | * For modes with bpp > 8, we only set the pseudo palette in |
1081 | * the fb_info struct. We rely on uvesafb_setcolreg to do all |
1082 | * sanity checking. |
1083 | */ |
1084 | for (i = 0; i < cmap->len; i++) { |
1085 | err |= uvesafb_setcolreg(cmap->start + i, cmap->red[i], |
1086 | cmap->green[i], cmap->blue[i], |
1087 | 0, info); |
1088 | } |
1089 | } |
1090 | return err; |
1091 | } |
1092 | |
1093 | static int uvesafb_pan_display(struct fb_var_screeninfo *var, |
1094 | struct fb_info *info) |
1095 | { |
1096 | #ifdef CONFIG_X86_32 |
1097 | int offset; |
1098 | struct uvesafb_par *par = info->par; |
1099 | |
1100 | offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4; |
1101 | |
1102 | /* |
1103 | * It turns out it's not the best idea to do panning via vm86, |
1104 | * so we only allow it if we have a PMI. |
1105 | */ |
1106 | if (par->pmi_start) { |
1107 | __asm__ __volatile__( |
1108 | "call *(%%edi)" |
1109 | : /* no return value */ |
1110 | : "a" (0x4f07), /* EAX */ |
1111 | "b" (0), /* EBX */ |
1112 | "c" (offset), /* ECX */ |
1113 | "d" (offset >> 16), /* EDX */ |
1114 | "D" (&par->pmi_start)); /* EDI */ |
1115 | } |
1116 | #endif |
1117 | return 0; |
1118 | } |
1119 | |
1120 | static int uvesafb_blank(int blank, struct fb_info *info) |
1121 | { |
1122 | struct uvesafb_ktask *task; |
1123 | int err = 1; |
1124 | #ifdef CONFIG_X86 |
1125 | struct uvesafb_par *par = info->par; |
1126 | |
1127 | if (par->vbe_ib.capabilities & VBE_CAP_VGACOMPAT) { |
1128 | int loop = 10000; |
1129 | u8 seq = 0, crtc17 = 0; |
1130 | |
1131 | if (blank == FB_BLANK_POWERDOWN) { |
1132 | seq = 0x20; |
1133 | crtc17 = 0x00; |
1134 | err = 0; |
1135 | } else { |
1136 | seq = 0x00; |
1137 | crtc17 = 0x80; |
1138 | err = (blank == FB_BLANK_UNBLANK) ? 0 : -EINVAL; |
1139 | } |
1140 | |
1141 | vga_wseq(NULL, 0x00, 0x01); |
1142 | seq |= vga_rseq(NULL, 0x01) & ~0x20; |
1143 | vga_wseq(NULL, 0x00, seq); |
1144 | |
1145 | crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80; |
1146 | while (loop--); |
1147 | vga_wcrt(NULL, 0x17, crtc17); |
1148 | vga_wseq(NULL, 0x00, 0x03); |
1149 | } else |
1150 | #endif /* CONFIG_X86 */ |
1151 | { |
1152 | task = uvesafb_prep(); |
1153 | if (!task) |
1154 | return -ENOMEM; |
1155 | |
1156 | task->t.regs.eax = 0x4f10; |
1157 | switch (blank) { |
1158 | case FB_BLANK_UNBLANK: |
1159 | task->t.regs.ebx = 0x0001; |
1160 | break; |
1161 | case FB_BLANK_NORMAL: |
1162 | task->t.regs.ebx = 0x0101; /* standby */ |
1163 | break; |
1164 | case FB_BLANK_POWERDOWN: |
1165 | task->t.regs.ebx = 0x0401; /* powerdown */ |
1166 | break; |
1167 | default: |
1168 | goto out; |
1169 | } |
1170 | |
1171 | err = uvesafb_exec(task); |
1172 | if (err || (task->t.regs.eax & 0xffff) != 0x004f) |
1173 | err = 1; |
1174 | out: uvesafb_free(task); |
1175 | } |
1176 | return err; |
1177 | } |
1178 | |
1179 | static int uvesafb_open(struct fb_info *info, int user) |
1180 | { |
1181 | struct uvesafb_par *par = info->par; |
1182 | int cnt = atomic_read(&par->ref_count); |
1183 | u8 *buf = NULL; |
1184 | |
1185 | if (!cnt && par->vbe_state_size) { |
1186 | buf = uvesafb_vbe_state_save(par); |
1187 | if (IS_ERR(buf)) { |
1188 | printk(KERN_WARNING "uvesafb: save hardware state" |
1189 | "failed, error code is %ld!\n", PTR_ERR(buf)); |
1190 | } else { |
1191 | par->vbe_state_orig = buf; |
1192 | } |
1193 | } |
1194 | |
1195 | atomic_inc(&par->ref_count); |
1196 | return 0; |
1197 | } |
1198 | |
1199 | static int uvesafb_release(struct fb_info *info, int user) |
1200 | { |
1201 | struct uvesafb_ktask *task = NULL; |
1202 | struct uvesafb_par *par = info->par; |
1203 | int cnt = atomic_read(&par->ref_count); |
1204 | |
1205 | if (!cnt) |
1206 | return -EINVAL; |
1207 | |
1208 | if (cnt != 1) |
1209 | goto out; |
1210 | |
1211 | task = uvesafb_prep(); |
1212 | if (!task) |
1213 | goto out; |
1214 | |
1215 | /* First, try to set the standard 80x25 text mode. */ |
1216 | task->t.regs.eax = 0x0003; |
1217 | uvesafb_exec(task); |
1218 | |
1219 | /* |
1220 | * Now try to restore whatever hardware state we might have |
1221 | * saved when the fb device was first opened. |
1222 | */ |
1223 | uvesafb_vbe_state_restore(par, par->vbe_state_orig); |
1224 | out: |
1225 | atomic_dec(&par->ref_count); |
1226 | if (task) |
1227 | uvesafb_free(task); |
1228 | return 0; |
1229 | } |
1230 | |
1231 | static int uvesafb_set_par(struct fb_info *info) |
1232 | { |
1233 | struct uvesafb_par *par = info->par; |
1234 | struct uvesafb_ktask *task = NULL; |
1235 | struct vbe_crtc_ib *crtc = NULL; |
1236 | struct vbe_mode_ib *mode = NULL; |
1237 | int i, err = 0, depth = info->var.bits_per_pixel; |
1238 | |
1239 | if (depth > 8 && depth != 32) |
1240 | depth = info->var.red.length + info->var.green.length + |
1241 | info->var.blue.length; |
1242 | |
1243 | i = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, depth, |
1244 | UVESAFB_EXACT_RES | UVESAFB_EXACT_DEPTH); |
1245 | if (i >= 0) |
1246 | mode = &par->vbe_modes[i]; |
1247 | else |
1248 | return -EINVAL; |
1249 | |
1250 | task = uvesafb_prep(); |
1251 | if (!task) |
1252 | return -ENOMEM; |
1253 | setmode: |
1254 | task->t.regs.eax = 0x4f02; |
1255 | task->t.regs.ebx = mode->mode_id | 0x4000; /* use LFB */ |
1256 | |
1257 | if (par->vbe_ib.vbe_version >= 0x0300 && !par->nocrtc && |
1258 | info->var.pixclock != 0) { |
1259 | task->t.regs.ebx |= 0x0800; /* use CRTC data */ |
1260 | task->t.flags = TF_BUF_ESDI; |
1261 | crtc = kzalloc(sizeof(struct vbe_crtc_ib), GFP_KERNEL); |
1262 | if (!crtc) { |
1263 | err = -ENOMEM; |
1264 | goto out; |
1265 | } |
1266 | crtc->horiz_start = info->var.xres + info->var.right_margin; |
1267 | crtc->horiz_end = crtc->horiz_start + info->var.hsync_len; |
1268 | crtc->horiz_total = crtc->horiz_end + info->var.left_margin; |
1269 | |
1270 | crtc->vert_start = info->var.yres + info->var.lower_margin; |
1271 | crtc->vert_end = crtc->vert_start + info->var.vsync_len; |
1272 | crtc->vert_total = crtc->vert_end + info->var.upper_margin; |
1273 | |
1274 | crtc->pixel_clock = PICOS2KHZ(info->var.pixclock) * 1000; |
1275 | crtc->refresh_rate = (u16)(100 * (crtc->pixel_clock / |
1276 | (crtc->vert_total * crtc->horiz_total))); |
1277 | |
1278 | if (info->var.vmode & FB_VMODE_DOUBLE) |
1279 | crtc->flags |= 0x1; |
1280 | if (info->var.vmode & FB_VMODE_INTERLACED) |
1281 | crtc->flags |= 0x2; |
1282 | if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT)) |
1283 | crtc->flags |= 0x4; |
1284 | if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT)) |
1285 | crtc->flags |= 0x8; |
1286 | memcpy(&par->crtc, crtc, sizeof(*crtc)); |
1287 | } else { |
1288 | memset(&par->crtc, 0, sizeof(*crtc)); |
1289 | } |
1290 | |
1291 | task->t.buf_len = sizeof(struct vbe_crtc_ib); |
1292 | task->buf = &par->crtc; |
1293 | |
1294 | err = uvesafb_exec(task); |
1295 | if (err || (task->t.regs.eax & 0xffff) != 0x004f) { |
1296 | /* |
1297 | * The mode switch might have failed because we tried to |
1298 | * use our own timings. Try again with the default timings. |
1299 | */ |
1300 | if (crtc != NULL) { |
1301 | printk(KERN_WARNING "uvesafb: mode switch failed " |
1302 | "(eax=0x%x, err=%d). Trying again with " |
1303 | "default timings.\n", task->t.regs.eax, err); |
1304 | uvesafb_reset(task); |
1305 | kfree(crtc); |
1306 | crtc = NULL; |
1307 | info->var.pixclock = 0; |
1308 | goto setmode; |
1309 | } else { |
1310 | printk(KERN_ERR "uvesafb: mode switch failed (eax=" |
1311 | "0x%x, err=%d)\n", task->t.regs.eax, err); |
1312 | err = -EINVAL; |
1313 | goto out; |
1314 | } |
1315 | } |
1316 | par->mode_idx = i; |
1317 | |
1318 | /* For 8bpp modes, always try to set the DAC to 8 bits. */ |
1319 | if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC && |
1320 | mode->bits_per_pixel <= 8) { |
1321 | uvesafb_reset(task); |
1322 | task->t.regs.eax = 0x4f08; |
1323 | task->t.regs.ebx = 0x0800; |
1324 | |
1325 | err = uvesafb_exec(task); |
1326 | if (err || (task->t.regs.eax & 0xffff) != 0x004f || |
1327 | ((task->t.regs.ebx & 0xff00) >> 8) != 8) { |
1328 | dac_width = 6; |
1329 | } else { |
1330 | dac_width = 8; |
1331 | } |
1332 | } |
1333 | |
1334 | info->fix.visual = (info->var.bits_per_pixel == 8) ? |
1335 | FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR; |
1336 | info->fix.line_length = mode->bytes_per_scan_line; |
1337 | |
1338 | out: if (crtc != NULL) |
1339 | kfree(crtc); |
1340 | uvesafb_free(task); |
1341 | |
1342 | return err; |
1343 | } |
1344 | |
1345 | static void uvesafb_check_limits(struct fb_var_screeninfo *var, |
1346 | struct fb_info *info) |
1347 | { |
1348 | const struct fb_videomode *mode; |
1349 | struct uvesafb_par *par = info->par; |
1350 | |
1351 | /* |
1352 | * If pixclock is set to 0, then we're using default BIOS timings |
1353 | * and thus don't have to perform any checks here. |
1354 | */ |
1355 | if (!var->pixclock) |
1356 | return; |
1357 | |
1358 | if (par->vbe_ib.vbe_version < 0x0300) { |
1359 | fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, var, info); |
1360 | return; |
1361 | } |
1362 | |
1363 | if (!fb_validate_mode(var, info)) |
1364 | return; |
1365 | |
1366 | mode = fb_find_best_mode(var, &info->modelist); |
1367 | if (mode) { |
1368 | if (mode->xres == var->xres && mode->yres == var->yres && |
1369 | !(mode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))) { |
1370 | fb_videomode_to_var(var, mode); |
1371 | return; |
1372 | } |
1373 | } |
1374 | |
1375 | if (info->monspecs.gtf && !fb_get_mode(FB_MAXTIMINGS, 0, var, info)) |
1376 | return; |
1377 | /* Use default refresh rate */ |
1378 | var->pixclock = 0; |
1379 | } |
1380 | |
1381 | static int uvesafb_check_var(struct fb_var_screeninfo *var, |
1382 | struct fb_info *info) |
1383 | { |
1384 | struct uvesafb_par *par = info->par; |
1385 | struct vbe_mode_ib *mode = NULL; |
1386 | int match = -1; |
1387 | int depth = var->red.length + var->green.length + var->blue.length; |
1388 | |
1389 | /* |
1390 | * Various apps will use bits_per_pixel to set the color depth, |
1391 | * which is theoretically incorrect, but which we'll try to handle |
1392 | * here. |
1393 | */ |
1394 | if (depth == 0 || abs(depth - var->bits_per_pixel) >= 8) |
1395 | depth = var->bits_per_pixel; |
1396 | |
1397 | match = uvesafb_vbe_find_mode(par, var->xres, var->yres, depth, |
1398 | UVESAFB_EXACT_RES); |
1399 | if (match == -1) |
1400 | return -EINVAL; |
1401 | |
1402 | mode = &par->vbe_modes[match]; |
1403 | uvesafb_setup_var(var, info, mode); |
1404 | |
1405 | /* |
1406 | * Check whether we have remapped enough memory for this mode. |
1407 | * We might be called at an early stage, when we haven't remapped |
1408 | * any memory yet, in which case we simply skip the check. |
1409 | */ |
1410 | if (var->yres * mode->bytes_per_scan_line > info->fix.smem_len |
1411 | && info->fix.smem_len) |
1412 | return -EINVAL; |
1413 | |
1414 | if ((var->vmode & FB_VMODE_DOUBLE) && |
1415 | !(par->vbe_modes[match].mode_attr & 0x100)) |
1416 | var->vmode &= ~FB_VMODE_DOUBLE; |
1417 | |
1418 | if ((var->vmode & FB_VMODE_INTERLACED) && |
1419 | !(par->vbe_modes[match].mode_attr & 0x200)) |
1420 | var->vmode &= ~FB_VMODE_INTERLACED; |
1421 | |
1422 | uvesafb_check_limits(var, info); |
1423 | |
1424 | var->xres_virtual = var->xres; |
1425 | var->yres_virtual = (par->ypan) ? |
1426 | info->fix.smem_len / mode->bytes_per_scan_line : |
1427 | var->yres; |
1428 | return 0; |
1429 | } |
1430 | |
1431 | static struct fb_ops uvesafb_ops = { |
1432 | .owner = THIS_MODULE, |
1433 | .fb_open = uvesafb_open, |
1434 | .fb_release = uvesafb_release, |
1435 | .fb_setcolreg = uvesafb_setcolreg, |
1436 | .fb_setcmap = uvesafb_setcmap, |
1437 | .fb_pan_display = uvesafb_pan_display, |
1438 | .fb_blank = uvesafb_blank, |
1439 | .fb_fillrect = cfb_fillrect, |
1440 | .fb_copyarea = cfb_copyarea, |
1441 | .fb_imageblit = cfb_imageblit, |
1442 | .fb_check_var = uvesafb_check_var, |
1443 | .fb_set_par = uvesafb_set_par, |
1444 | }; |
1445 | |
1446 | static void uvesafb_init_info(struct fb_info *info, struct vbe_mode_ib *mode) |
1447 | { |
1448 | unsigned int size_vmode; |
1449 | unsigned int size_remap; |
1450 | unsigned int size_total; |
1451 | struct uvesafb_par *par = info->par; |
1452 | int i, h; |
1453 | |
1454 | info->pseudo_palette = ((u8 *)info->par + sizeof(struct uvesafb_par)); |
1455 | info->fix = uvesafb_fix; |
1456 | info->fix.ypanstep = par->ypan ? 1 : 0; |
1457 | info->fix.ywrapstep = (par->ypan > 1) ? 1 : 0; |
1458 | |
1459 | /* Disable blanking if the user requested so. */ |
1460 | if (!blank) |
1461 | info->fbops->fb_blank = NULL; |
1462 | |
1463 | /* |
1464 | * Find out how much IO memory is required for the mode with |
1465 | * the highest resolution. |
1466 | */ |
1467 | size_remap = 0; |
1468 | for (i = 0; i < par->vbe_modes_cnt; i++) { |
1469 | h = par->vbe_modes[i].bytes_per_scan_line * |
1470 | par->vbe_modes[i].y_res; |
1471 | if (h > size_remap) |
1472 | size_remap = h; |
1473 | } |
1474 | size_remap *= 2; |
1475 | |
1476 | /* |
1477 | * size_vmode -- that is the amount of memory needed for the |
1478 | * used video mode, i.e. the minimum amount of |
1479 | * memory we need. |
1480 | */ |
1481 | if (mode != NULL) { |
1482 | size_vmode = info->var.yres * mode->bytes_per_scan_line; |
1483 | } else { |
1484 | size_vmode = info->var.yres * info->var.xres * |
1485 | ((info->var.bits_per_pixel + 7) >> 3); |
1486 | } |
1487 | |
1488 | /* |
1489 | * size_total -- all video memory we have. Used for mtrr |
1490 | * entries, resource allocation and bounds |
1491 | * checking. |
1492 | */ |
1493 | size_total = par->vbe_ib.total_memory * 65536; |
1494 | if (vram_total) |
1495 | size_total = vram_total * 1024 * 1024; |
1496 | if (size_total < size_vmode) |
1497 | size_total = size_vmode; |
1498 | |
1499 | /* |
1500 | * size_remap -- the amount of video memory we are going to |
1501 | * use for vesafb. With modern cards it is no |
1502 | * option to simply use size_total as th |
1503 | * wastes plenty of kernel address space. |
1504 | */ |
1505 | if (vram_remap) |
1506 | size_remap = vram_remap * 1024 * 1024; |
1507 | if (size_remap < size_vmode) |
1508 | size_remap = size_vmode; |
1509 | if (size_remap > size_total) |
1510 | size_remap = size_total; |
1511 | |
1512 | info->fix.smem_len = size_remap; |
1513 | info->fix.smem_start = mode->phys_base_ptr; |
1514 | |
1515 | /* |
1516 | * We have to set yres_virtual here because when setup_var() was |
1517 | * called, smem_len wasn't defined yet. |
1518 | */ |
1519 | info->var.yres_virtual = info->fix.smem_len / |
1520 | mode->bytes_per_scan_line; |
1521 | |
1522 | if (par->ypan && info->var.yres_virtual > info->var.yres) { |
1523 | printk(KERN_INFO "uvesafb: scrolling: %s " |
1524 | "using protected mode interface, " |
1525 | "yres_virtual=%d\n", |
1526 | (par->ypan > 1) ? "ywrap" : "ypan", |
1527 | info->var.yres_virtual); |
1528 | } else { |
1529 | printk(KERN_INFO "uvesafb: scrolling: redraw\n"); |
1530 | info->var.yres_virtual = info->var.yres; |
1531 | par->ypan = 0; |
1532 | } |
1533 | |
1534 | info->flags = FBINFO_FLAG_DEFAULT | |
1535 | (par->ypan ? FBINFO_HWACCEL_YPAN : 0); |
1536 | |
1537 | if (!par->ypan) |
1538 | info->fbops->fb_pan_display = NULL; |
1539 | } |
1540 | |
1541 | static void uvesafb_init_mtrr(struct fb_info *info) |
1542 | { |
1543 | #ifdef CONFIG_MTRR |
1544 | if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) { |
1545 | int temp_size = info->fix.smem_len; |
1546 | unsigned int type = 0; |
1547 | |
1548 | switch (mtrr) { |
1549 | case 1: |
1550 | type = MTRR_TYPE_UNCACHABLE; |
1551 | break; |
1552 | case 2: |
1553 | type = MTRR_TYPE_WRBACK; |
1554 | break; |
1555 | case 3: |
1556 | type = MTRR_TYPE_WRCOMB; |
1557 | break; |
1558 | case 4: |
1559 | type = MTRR_TYPE_WRTHROUGH; |
1560 | break; |
1561 | default: |
1562 | type = 0; |
1563 | break; |
1564 | } |
1565 | |
1566 | if (type) { |
1567 | int rc; |
1568 | |
1569 | /* Find the largest power-of-two */ |
1570 | temp_size = roundup_pow_of_two(temp_size); |
1571 | |
1572 | /* Try and find a power of two to add */ |
1573 | do { |
1574 | rc = mtrr_add(info->fix.smem_start, |
1575 | temp_size, type, 1); |
1576 | temp_size >>= 1; |
1577 | } while (temp_size >= PAGE_SIZE && rc == -EINVAL); |
1578 | } |
1579 | } |
1580 | #endif /* CONFIG_MTRR */ |
1581 | } |
1582 | |
1583 | static void uvesafb_ioremap(struct fb_info *info) |
1584 | { |
1585 | #ifdef CONFIG_X86 |
1586 | switch (mtrr) { |
1587 | case 1: /* uncachable */ |
1588 | info->screen_base = ioremap_nocache(info->fix.smem_start, info->fix.smem_len); |
1589 | break; |
1590 | case 2: /* write-back */ |
1591 | info->screen_base = ioremap_cache(info->fix.smem_start, info->fix.smem_len); |
1592 | break; |
1593 | case 3: /* write-combining */ |
1594 | info->screen_base = ioremap_wc(info->fix.smem_start, info->fix.smem_len); |
1595 | break; |
1596 | case 4: /* write-through */ |
1597 | default: |
1598 | info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len); |
1599 | break; |
1600 | } |
1601 | #else |
1602 | info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len); |
1603 | #endif /* CONFIG_X86 */ |
1604 | } |
1605 | |
1606 | static ssize_t uvesafb_show_vbe_ver(struct device *dev, |
1607 | struct device_attribute *attr, char *buf) |
1608 | { |
1609 | struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); |
1610 | struct uvesafb_par *par = info->par; |
1611 | |
1612 | return snprintf(buf, PAGE_SIZE, "%.4x\n", par->vbe_ib.vbe_version); |
1613 | } |
1614 | |
1615 | static DEVICE_ATTR(vbe_version, S_IRUGO, uvesafb_show_vbe_ver, NULL); |
1616 | |
1617 | static ssize_t uvesafb_show_vbe_modes(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 | int ret = 0, i; |
1623 | |
1624 | for (i = 0; i < par->vbe_modes_cnt && ret < PAGE_SIZE; i++) { |
1625 | ret += snprintf(buf + ret, PAGE_SIZE - ret, |
1626 | "%dx%d-%d, 0x%.4x\n", |
1627 | par->vbe_modes[i].x_res, par->vbe_modes[i].y_res, |
1628 | par->vbe_modes[i].depth, par->vbe_modes[i].mode_id); |
1629 | } |
1630 | |
1631 | return ret; |
1632 | } |
1633 | |
1634 | static DEVICE_ATTR(vbe_modes, S_IRUGO, uvesafb_show_vbe_modes, NULL); |
1635 | |
1636 | static ssize_t uvesafb_show_vendor(struct device *dev, |
1637 | struct device_attribute *attr, char *buf) |
1638 | { |
1639 | struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); |
1640 | struct uvesafb_par *par = info->par; |
1641 | |
1642 | if (par->vbe_ib.oem_vendor_name_ptr) |
1643 | return snprintf(buf, PAGE_SIZE, "%s\n", (char *) |
1644 | (&par->vbe_ib) + par->vbe_ib.oem_vendor_name_ptr); |
1645 | else |
1646 | return 0; |
1647 | } |
1648 | |
1649 | static DEVICE_ATTR(oem_vendor, S_IRUGO, uvesafb_show_vendor, NULL); |
1650 | |
1651 | static ssize_t uvesafb_show_product_name(struct device *dev, |
1652 | struct device_attribute *attr, char *buf) |
1653 | { |
1654 | struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); |
1655 | struct uvesafb_par *par = info->par; |
1656 | |
1657 | if (par->vbe_ib.oem_product_name_ptr) |
1658 | return snprintf(buf, PAGE_SIZE, "%s\n", (char *) |
1659 | (&par->vbe_ib) + par->vbe_ib.oem_product_name_ptr); |
1660 | else |
1661 | return 0; |
1662 | } |
1663 | |
1664 | static DEVICE_ATTR(oem_product_name, S_IRUGO, uvesafb_show_product_name, NULL); |
1665 | |
1666 | static ssize_t uvesafb_show_product_rev(struct device *dev, |
1667 | struct device_attribute *attr, char *buf) |
1668 | { |
1669 | struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); |
1670 | struct uvesafb_par *par = info->par; |
1671 | |
1672 | if (par->vbe_ib.oem_product_rev_ptr) |
1673 | return snprintf(buf, PAGE_SIZE, "%s\n", (char *) |
1674 | (&par->vbe_ib) + par->vbe_ib.oem_product_rev_ptr); |
1675 | else |
1676 | return 0; |
1677 | } |
1678 | |
1679 | static DEVICE_ATTR(oem_product_rev, S_IRUGO, uvesafb_show_product_rev, NULL); |
1680 | |
1681 | static ssize_t uvesafb_show_oem_string(struct device *dev, |
1682 | struct device_attribute *attr, char *buf) |
1683 | { |
1684 | struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); |
1685 | struct uvesafb_par *par = info->par; |
1686 | |
1687 | if (par->vbe_ib.oem_string_ptr) |
1688 | return snprintf(buf, PAGE_SIZE, "%s\n", |
1689 | (char *)(&par->vbe_ib) + par->vbe_ib.oem_string_ptr); |
1690 | else |
1691 | return 0; |
1692 | } |
1693 | |
1694 | static DEVICE_ATTR(oem_string, S_IRUGO, uvesafb_show_oem_string, NULL); |
1695 | |
1696 | static ssize_t uvesafb_show_nocrtc(struct device *dev, |
1697 | struct device_attribute *attr, char *buf) |
1698 | { |
1699 | struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); |
1700 | struct uvesafb_par *par = info->par; |
1701 | |
1702 | return snprintf(buf, PAGE_SIZE, "%d\n", par->nocrtc); |
1703 | } |
1704 | |
1705 | static ssize_t uvesafb_store_nocrtc(struct device *dev, |
1706 | struct device_attribute *attr, const char *buf, size_t count) |
1707 | { |
1708 | struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); |
1709 | struct uvesafb_par *par = info->par; |
1710 | |
1711 | if (count > 0) { |
1712 | if (buf[0] == '0') |
1713 | par->nocrtc = 0; |
1714 | else |
1715 | par->nocrtc = 1; |
1716 | } |
1717 | return count; |
1718 | } |
1719 | |
1720 | static DEVICE_ATTR(nocrtc, S_IRUGO | S_IWUSR, uvesafb_show_nocrtc, |
1721 | uvesafb_store_nocrtc); |
1722 | |
1723 | static struct attribute *uvesafb_dev_attrs[] = { |
1724 | &dev_attr_vbe_version.attr, |
1725 | &dev_attr_vbe_modes.attr, |
1726 | &dev_attr_oem_vendor.attr, |
1727 | &dev_attr_oem_product_name.attr, |
1728 | &dev_attr_oem_product_rev.attr, |
1729 | &dev_attr_oem_string.attr, |
1730 | &dev_attr_nocrtc.attr, |
1731 | NULL, |
1732 | }; |
1733 | |
1734 | static struct attribute_group uvesafb_dev_attgrp = { |
1735 | .name = NULL, |
1736 | .attrs = uvesafb_dev_attrs, |
1737 | }; |
1738 | |
1739 | static int uvesafb_probe(struct platform_device *dev) |
1740 | { |
1741 | struct fb_info *info; |
1742 | struct vbe_mode_ib *mode = NULL; |
1743 | struct uvesafb_par *par; |
1744 | int err = 0, i; |
1745 | |
1746 | info = framebuffer_alloc(sizeof(*par) + sizeof(u32) * 256, &dev->dev); |
1747 | if (!info) |
1748 | return -ENOMEM; |
1749 | |
1750 | par = info->par; |
1751 | |
1752 | err = uvesafb_vbe_init(info); |
1753 | if (err) { |
1754 | printk(KERN_ERR "uvesafb: vbe_init() failed with %d\n", err); |
1755 | goto out; |
1756 | } |
1757 | |
1758 | info->fbops = &uvesafb_ops; |
1759 | |
1760 | i = uvesafb_vbe_init_mode(info); |
1761 | if (i < 0) { |
1762 | err = -EINVAL; |
1763 | goto out; |
1764 | } else { |
1765 | mode = &par->vbe_modes[i]; |
1766 | } |
1767 | |
1768 | if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) { |
1769 | err = -ENXIO; |
1770 | goto out; |
1771 | } |
1772 | |
1773 | uvesafb_init_info(info, mode); |
1774 | |
1775 | if (!request_region(0x3c0, 32, "uvesafb")) { |
1776 | printk(KERN_ERR "uvesafb: request region 0x3c0-0x3e0 failed\n"); |
1777 | err = -EIO; |
1778 | goto out_mode; |
1779 | } |
1780 | |
1781 | if (!request_mem_region(info->fix.smem_start, info->fix.smem_len, |
1782 | "uvesafb")) { |
1783 | printk(KERN_ERR "uvesafb: cannot reserve video memory at " |
1784 | "0x%lx\n", info->fix.smem_start); |
1785 | err = -EIO; |
1786 | goto out_reg; |
1787 | } |
1788 | |
1789 | uvesafb_init_mtrr(info); |
1790 | uvesafb_ioremap(info); |
1791 | |
1792 | if (!info->screen_base) { |
1793 | printk(KERN_ERR |
1794 | "uvesafb: abort, cannot ioremap 0x%x bytes of video " |
1795 | "memory at 0x%lx\n", |
1796 | info->fix.smem_len, info->fix.smem_start); |
1797 | err = -EIO; |
1798 | goto out_mem; |
1799 | } |
1800 | |
1801 | platform_set_drvdata(dev, info); |
1802 | |
1803 | if (register_framebuffer(info) < 0) { |
1804 | printk(KERN_ERR |
1805 | "uvesafb: failed to register framebuffer device\n"); |
1806 | err = -EINVAL; |
1807 | goto out_unmap; |
1808 | } |
1809 | |
1810 | printk(KERN_INFO "uvesafb: framebuffer at 0x%lx, mapped to 0x%p, " |
1811 | "using %dk, total %dk\n", info->fix.smem_start, |
1812 | info->screen_base, info->fix.smem_len/1024, |
1813 | par->vbe_ib.total_memory * 64); |
1814 | printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node, |
1815 | info->fix.id); |
1816 | |
1817 | err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp); |
1818 | if (err != 0) |
1819 | printk(KERN_WARNING "fb%d: failed to register attributes\n", |
1820 | info->node); |
1821 | |
1822 | return 0; |
1823 | |
1824 | out_unmap: |
1825 | iounmap(info->screen_base); |
1826 | out_mem: |
1827 | release_mem_region(info->fix.smem_start, info->fix.smem_len); |
1828 | out_reg: |
1829 | release_region(0x3c0, 32); |
1830 | out_mode: |
1831 | if (!list_empty(&info->modelist)) |
1832 | fb_destroy_modelist(&info->modelist); |
1833 | fb_destroy_modedb(info->monspecs.modedb); |
1834 | fb_dealloc_cmap(&info->cmap); |
1835 | out: |
1836 | if (par->vbe_modes) |
1837 | kfree(par->vbe_modes); |
1838 | |
1839 | framebuffer_release(info); |
1840 | return err; |
1841 | } |
1842 | |
1843 | static int uvesafb_remove(struct platform_device *dev) |
1844 | { |
1845 | struct fb_info *info = platform_get_drvdata(dev); |
1846 | |
1847 | if (info) { |
1848 | struct uvesafb_par *par = info->par; |
1849 | |
1850 | sysfs_remove_group(&dev->dev.kobj, &uvesafb_dev_attgrp); |
1851 | unregister_framebuffer(info); |
1852 | release_region(0x3c0, 32); |
1853 | iounmap(info->screen_base); |
1854 | release_mem_region(info->fix.smem_start, info->fix.smem_len); |
1855 | fb_destroy_modedb(info->monspecs.modedb); |
1856 | fb_dealloc_cmap(&info->cmap); |
1857 | |
1858 | if (par) { |
1859 | if (par->vbe_modes) |
1860 | kfree(par->vbe_modes); |
1861 | if (par->vbe_state_orig) |
1862 | kfree(par->vbe_state_orig); |
1863 | if (par->vbe_state_saved) |
1864 | kfree(par->vbe_state_saved); |
1865 | } |
1866 | |
1867 | framebuffer_release(info); |
1868 | } |
1869 | return 0; |
1870 | } |
1871 | |
1872 | static struct platform_driver uvesafb_driver = { |
1873 | .probe = uvesafb_probe, |
1874 | .remove = uvesafb_remove, |
1875 | .driver = { |
1876 | .name = "uvesafb", |
1877 | }, |
1878 | }; |
1879 | |
1880 | static struct platform_device *uvesafb_device; |
1881 | |
1882 | #ifndef MODULE |
1883 | static int uvesafb_setup(char *options) |
1884 | { |
1885 | char *this_opt; |
1886 | |
1887 | if (!options || !*options) |
1888 | return 0; |
1889 | |
1890 | while ((this_opt = strsep(&options, ",")) != NULL) { |
1891 | if (!*this_opt) continue; |
1892 | |
1893 | if (!strcmp(this_opt, "redraw")) |
1894 | ypan = 0; |
1895 | else if (!strcmp(this_opt, "ypan")) |
1896 | ypan = 1; |
1897 | else if (!strcmp(this_opt, "ywrap")) |
1898 | ypan = 2; |
1899 | else if (!strcmp(this_opt, "vgapal")) |
1900 | pmi_setpal = 0; |
1901 | else if (!strcmp(this_opt, "pmipal")) |
1902 | pmi_setpal = 1; |
1903 | else if (!strncmp(this_opt, "mtrr:", 5)) |
1904 | mtrr = simple_strtoul(this_opt+5, NULL, 0); |
1905 | else if (!strcmp(this_opt, "nomtrr")) |
1906 | mtrr = 0; |
1907 | else if (!strcmp(this_opt, "nocrtc")) |
1908 | nocrtc = 1; |
1909 | else if (!strcmp(this_opt, "noedid")) |
1910 | noedid = 1; |
1911 | else if (!strcmp(this_opt, "noblank")) |
1912 | blank = 0; |
1913 | else if (!strncmp(this_opt, "vtotal:", 7)) |
1914 | vram_total = simple_strtoul(this_opt + 7, NULL, 0); |
1915 | else if (!strncmp(this_opt, "vremap:", 7)) |
1916 | vram_remap = simple_strtoul(this_opt + 7, NULL, 0); |
1917 | else if (!strncmp(this_opt, "maxhf:", 6)) |
1918 | maxhf = simple_strtoul(this_opt + 6, NULL, 0); |
1919 | else if (!strncmp(this_opt, "maxvf:", 6)) |
1920 | maxvf = simple_strtoul(this_opt + 6, NULL, 0); |
1921 | else if (!strncmp(this_opt, "maxclk:", 7)) |
1922 | maxclk = simple_strtoul(this_opt + 7, NULL, 0); |
1923 | else if (!strncmp(this_opt, "vbemode:", 8)) |
1924 | vbemode = simple_strtoul(this_opt + 8, NULL, 0); |
1925 | else if (this_opt[0] >= '0' && this_opt[0] <= '9') { |
1926 | mode_option = this_opt; |
1927 | } else { |
1928 | printk(KERN_WARNING |
1929 | "uvesafb: unrecognized option %s\n", this_opt); |
1930 | } |
1931 | } |
1932 | |
1933 | return 0; |
1934 | } |
1935 | #endif /* !MODULE */ |
1936 | |
1937 | static ssize_t show_v86d(struct device_driver *dev, char *buf) |
1938 | { |
1939 | return snprintf(buf, PAGE_SIZE, "%s\n", v86d_path); |
1940 | } |
1941 | |
1942 | static ssize_t store_v86d(struct device_driver *dev, const char *buf, |
1943 | size_t count) |
1944 | { |
1945 | strncpy(v86d_path, buf, PATH_MAX); |
1946 | return count; |
1947 | } |
1948 | |
1949 | static DRIVER_ATTR(v86d, S_IRUGO | S_IWUSR, show_v86d, store_v86d); |
1950 | |
1951 | static int uvesafb_init(void) |
1952 | { |
1953 | int err; |
1954 | |
1955 | #ifndef MODULE |
1956 | char *option = NULL; |
1957 | |
1958 | if (fb_get_options("uvesafb", &option)) |
1959 | return -ENODEV; |
1960 | uvesafb_setup(option); |
1961 | #endif |
1962 | err = cn_add_callback(&uvesafb_cn_id, "uvesafb", uvesafb_cn_callback); |
1963 | if (err) |
1964 | return err; |
1965 | |
1966 | err = platform_driver_register(&uvesafb_driver); |
1967 | |
1968 | if (!err) { |
1969 | uvesafb_device = platform_device_alloc("uvesafb", 0); |
1970 | if (uvesafb_device) |
1971 | err = platform_device_add(uvesafb_device); |
1972 | else |
1973 | err = -ENOMEM; |
1974 | |
1975 | if (err) { |
1976 | if (uvesafb_device) |
1977 | platform_device_put(uvesafb_device); |
1978 | platform_driver_unregister(&uvesafb_driver); |
1979 | cn_del_callback(&uvesafb_cn_id); |
1980 | return err; |
1981 | } |
1982 | |
1983 | err = driver_create_file(&uvesafb_driver.driver, |
1984 | &driver_attr_v86d); |
1985 | if (err) { |
1986 | printk(KERN_WARNING "uvesafb: failed to register " |
1987 | "attributes\n"); |
1988 | err = 0; |
1989 | } |
1990 | } |
1991 | return err; |
1992 | } |
1993 | |
1994 | module_init(uvesafb_init); |
1995 | |
1996 | static void uvesafb_exit(void) |
1997 | { |
1998 | struct uvesafb_ktask *task; |
1999 | |
2000 | if (v86d_started) { |
2001 | task = uvesafb_prep(); |
2002 | if (task) { |
2003 | task->t.flags = TF_EXIT; |
2004 | uvesafb_exec(task); |
2005 | uvesafb_free(task); |
2006 | } |
2007 | } |
2008 | |
2009 | cn_del_callback(&uvesafb_cn_id); |
2010 | driver_remove_file(&uvesafb_driver.driver, &driver_attr_v86d); |
2011 | platform_device_unregister(uvesafb_device); |
2012 | platform_driver_unregister(&uvesafb_driver); |
2013 | } |
2014 | |
2015 | module_exit(uvesafb_exit); |
2016 | |
2017 | static int param_set_scroll(const char *val, const struct kernel_param *kp) |
2018 | { |
2019 | ypan = 0; |
2020 | |
2021 | if (!strcmp(val, "redraw")) |
2022 | ypan = 0; |
2023 | else if (!strcmp(val, "ypan")) |
2024 | ypan = 1; |
2025 | else if (!strcmp(val, "ywrap")) |
2026 | ypan = 2; |
2027 | else |
2028 | return -EINVAL; |
2029 | |
2030 | return 0; |
2031 | } |
2032 | static struct kernel_param_ops param_ops_scroll = { |
2033 | .set = param_set_scroll, |
2034 | }; |
2035 | #define param_check_scroll(name, p) __param_check(name, p, void) |
2036 | |
2037 | module_param_named(scroll, ypan, scroll, 0); |
2038 | MODULE_PARM_DESC(scroll, |
2039 | "Scrolling mode, set to 'redraw', 'ypan', or 'ywrap'"); |
2040 | module_param_named(vgapal, pmi_setpal, invbool, 0); |
2041 | MODULE_PARM_DESC(vgapal, "Set palette using VGA registers"); |
2042 | module_param_named(pmipal, pmi_setpal, bool, 0); |
2043 | MODULE_PARM_DESC(pmipal, "Set palette using PMI calls"); |
2044 | module_param(mtrr, uint, 0); |
2045 | MODULE_PARM_DESC(mtrr, |
2046 | "Memory Type Range Registers setting. Use 0 to disable."); |
2047 | module_param(blank, bool, 0); |
2048 | MODULE_PARM_DESC(blank, "Enable hardware blanking"); |
2049 | module_param(nocrtc, bool, 0); |
2050 | MODULE_PARM_DESC(nocrtc, "Ignore CRTC timings when setting modes"); |
2051 | module_param(noedid, bool, 0); |
2052 | MODULE_PARM_DESC(noedid, |
2053 | "Ignore EDID-provided monitor limits when setting modes"); |
2054 | module_param(vram_remap, uint, 0); |
2055 | MODULE_PARM_DESC(vram_remap, "Set amount of video memory to be used [MiB]"); |
2056 | module_param(vram_total, uint, 0); |
2057 | MODULE_PARM_DESC(vram_total, "Set total amount of video memoery [MiB]"); |
2058 | module_param(maxclk, ushort, 0); |
2059 | MODULE_PARM_DESC(maxclk, "Maximum pixelclock [MHz], overrides EDID data"); |
2060 | module_param(maxhf, ushort, 0); |
2061 | MODULE_PARM_DESC(maxhf, |
2062 | "Maximum horizontal frequency [kHz], overrides EDID data"); |
2063 | module_param(maxvf, ushort, 0); |
2064 | MODULE_PARM_DESC(maxvf, |
2065 | "Maximum vertical frequency [Hz], overrides EDID data"); |
2066 | module_param(mode_option, charp, 0); |
2067 | MODULE_PARM_DESC(mode_option, |
2068 | "Specify initial video mode as \"<xres>x<yres>[-<bpp>][@<refresh>]\""); |
2069 | module_param(vbemode, ushort, 0); |
2070 | MODULE_PARM_DESC(vbemode, |
2071 | "VBE mode number to set, overrides the 'mode' option"); |
2072 | module_param_string(v86d, v86d_path, PATH_MAX, 0660); |
2073 | MODULE_PARM_DESC(v86d, "Path to the v86d userspace helper."); |
2074 | |
2075 | MODULE_LICENSE("GPL"); |
2076 | MODULE_AUTHOR("Michal Januszewski <spock@gentoo.org>"); |
2077 | MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards"); |
2078 | |
2079 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
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v3.9