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Commit | Line | Data |
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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
8bdb3a2d MJ |
2 | /* |
3 | * A framebuffer driver for VBE 2.0+ compliant video cards | |
4 | * | |
5 | * (c) 2007 Michal Januszewski <spock@gentoo.org> | |
6 | * Loosely based upon the vesafb driver. | |
7 | * | |
8 | */ | |
a8feae09 JP |
9 | |
10 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
11 | ||
8bdb3a2d MJ |
12 | #include <linux/init.h> |
13 | #include <linux/module.h> | |
14 | #include <linux/moduleparam.h> | |
15 | #include <linux/skbuff.h> | |
16 | #include <linux/timer.h> | |
17 | #include <linux/completion.h> | |
18 | #include <linux/connector.h> | |
19 | #include <linux/random.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/limits.h> | |
22 | #include <linux/fb.h> | |
23 | #include <linux/io.h> | |
24 | #include <linux/mutex.h> | |
5a0e3ad6 | 25 | #include <linux/slab.h> |
8bdb3a2d MJ |
26 | #include <video/edid.h> |
27 | #include <video/uvesafb.h> | |
28 | #ifdef CONFIG_X86 | |
29 | #include <video/vga.h> | |
30 | #endif | |
8bdb3a2d MJ |
31 | #include "edid.h" |
32 | ||
33 | static struct cb_id uvesafb_cn_id = { | |
34 | .idx = CN_IDX_V86D, | |
35 | .val = CN_VAL_V86D_UVESAFB | |
36 | }; | |
37 | static char v86d_path[PATH_MAX] = "/sbin/v86d"; | |
38 | static char v86d_started; /* has v86d been started by uvesafb? */ | |
39 | ||
ca9384c5 | 40 | static const struct fb_fix_screeninfo uvesafb_fix = { |
8bdb3a2d MJ |
41 | .id = "VESA VGA", |
42 | .type = FB_TYPE_PACKED_PIXELS, | |
43 | .accel = FB_ACCEL_NONE, | |
44 | .visual = FB_VISUAL_TRUECOLOR, | |
45 | }; | |
46 | ||
48c68c4f | 47 | static int mtrr = 3; /* enable mtrr by default */ |
dbc7ece1 | 48 | static bool blank = true; /* enable blanking by default */ |
48c68c4f GKH |
49 | static int ypan = 1; /* 0: scroll, 1: ypan, 2: ywrap */ |
50 | static bool pmi_setpal = true; /* use PMI for palette changes */ | |
51 | static bool nocrtc; /* ignore CRTC settings */ | |
52 | static bool noedid; /* don't try DDC transfers */ | |
53 | static int vram_remap; /* set amt. of memory to be used */ | |
54 | static int vram_total; /* set total amount of memory */ | |
55 | static u16 maxclk; /* maximum pixel clock */ | |
56 | static u16 maxvf; /* maximum vertical frequency */ | |
57 | static u16 maxhf; /* maximum horizontal frequency */ | |
58 | static u16 vbemode; /* force use of a specific VBE mode */ | |
59 | static char *mode_option; | |
0ca1071f | 60 | static u8 dac_width = 6; |
8bdb3a2d MJ |
61 | |
62 | static struct uvesafb_ktask *uvfb_tasks[UVESAFB_TASKS_MAX]; | |
63 | static DEFINE_MUTEX(uvfb_lock); | |
64 | ||
65 | /* | |
66 | * A handler for replies from userspace. | |
67 | * | |
68 | * Make sure each message passes consistency checks and if it does, | |
69 | * find the kernel part of the task struct, copy the registers and | |
70 | * the buffer contents and then complete the task. | |
71 | */ | |
7069331d | 72 | static void uvesafb_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp) |
8bdb3a2d | 73 | { |
8bdb3a2d MJ |
74 | struct uvesafb_task *utask; |
75 | struct uvesafb_ktask *task; | |
76 | ||
38bf1953 | 77 | if (!capable(CAP_SYS_ADMIN)) |
cc44578b PR |
78 | return; |
79 | ||
8bdb3a2d MJ |
80 | if (msg->seq >= UVESAFB_TASKS_MAX) |
81 | return; | |
82 | ||
83 | mutex_lock(&uvfb_lock); | |
84 | task = uvfb_tasks[msg->seq]; | |
85 | ||
86 | if (!task || msg->ack != task->ack) { | |
87 | mutex_unlock(&uvfb_lock); | |
88 | return; | |
89 | } | |
90 | ||
91 | utask = (struct uvesafb_task *)msg->data; | |
92 | ||
93 | /* Sanity checks for the buffer length. */ | |
94 | if (task->t.buf_len < utask->buf_len || | |
95 | utask->buf_len > msg->len - sizeof(*utask)) { | |
96 | mutex_unlock(&uvfb_lock); | |
97 | return; | |
98 | } | |
99 | ||
100 | uvfb_tasks[msg->seq] = NULL; | |
101 | mutex_unlock(&uvfb_lock); | |
102 | ||
103 | memcpy(&task->t, utask, sizeof(*utask)); | |
104 | ||
105 | if (task->t.buf_len && task->buf) | |
106 | memcpy(task->buf, utask + 1, task->t.buf_len); | |
107 | ||
108 | complete(task->done); | |
109 | return; | |
110 | } | |
111 | ||
112 | static int uvesafb_helper_start(void) | |
113 | { | |
114 | char *envp[] = { | |
115 | "HOME=/", | |
116 | "PATH=/sbin:/bin", | |
117 | NULL, | |
118 | }; | |
119 | ||
120 | char *argv[] = { | |
121 | v86d_path, | |
122 | NULL, | |
123 | }; | |
124 | ||
70834d30 | 125 | return call_usermodehelper(v86d_path, argv, envp, UMH_WAIT_PROC); |
8bdb3a2d MJ |
126 | } |
127 | ||
128 | /* | |
129 | * Execute a uvesafb task. | |
130 | * | |
131 | * Returns 0 if the task is executed successfully. | |
132 | * | |
133 | * A message sent to the userspace consists of the uvesafb_task | |
134 | * struct and (optionally) a buffer. The uvesafb_task struct is | |
135 | * a simplified version of uvesafb_ktask (its kernel counterpart) | |
136 | * containing only the register values, flags and the length of | |
137 | * the buffer. | |
138 | * | |
139 | * Each message is assigned a sequence number (increased linearly) | |
140 | * and a random ack number. The sequence number is used as a key | |
141 | * for the uvfb_tasks array which holds pointers to uvesafb_ktask | |
142 | * structs for all requests. | |
143 | */ | |
144 | static int uvesafb_exec(struct uvesafb_ktask *task) | |
145 | { | |
146 | static int seq; | |
147 | struct cn_msg *m; | |
148 | int err; | |
149 | int len = sizeof(task->t) + task->t.buf_len; | |
150 | ||
151 | /* | |
152 | * Check whether the message isn't longer than the maximum | |
153 | * allowed by connector. | |
154 | */ | |
155 | if (sizeof(*m) + len > CONNECTOR_MAX_MSG_SIZE) { | |
a8feae09 JP |
156 | pr_warn("message too long (%d), can't execute task\n", |
157 | (int)(sizeof(*m) + len)); | |
8bdb3a2d MJ |
158 | return -E2BIG; |
159 | } | |
160 | ||
161 | m = kzalloc(sizeof(*m) + len, GFP_KERNEL); | |
162 | if (!m) | |
163 | return -ENOMEM; | |
164 | ||
165 | init_completion(task->done); | |
166 | ||
167 | memcpy(&m->id, &uvesafb_cn_id, sizeof(m->id)); | |
168 | m->seq = seq; | |
169 | m->len = len; | |
a251c17a | 170 | m->ack = get_random_u32(); |
8bdb3a2d MJ |
171 | |
172 | /* uvesafb_task structure */ | |
173 | memcpy(m + 1, &task->t, sizeof(task->t)); | |
174 | ||
175 | /* Buffer */ | |
176 | memcpy((u8 *)(m + 1) + sizeof(task->t), task->buf, task->t.buf_len); | |
177 | ||
178 | /* | |
179 | * Save the message ack number so that we can find the kernel | |
180 | * part of this task when a reply is received from userspace. | |
181 | */ | |
182 | task->ack = m->ack; | |
183 | ||
184 | mutex_lock(&uvfb_lock); | |
185 | ||
186 | /* If all slots are taken -- bail out. */ | |
187 | if (uvfb_tasks[seq]) { | |
188 | mutex_unlock(&uvfb_lock); | |
60c1645d AM |
189 | err = -EBUSY; |
190 | goto out; | |
8bdb3a2d MJ |
191 | } |
192 | ||
193 | /* Save a pointer to the kernel part of the task struct. */ | |
194 | uvfb_tasks[seq] = task; | |
195 | mutex_unlock(&uvfb_lock); | |
196 | ||
ac8f7330 | 197 | err = cn_netlink_send(m, 0, 0, GFP_KERNEL); |
8bdb3a2d MJ |
198 | if (err == -ESRCH) { |
199 | /* | |
200 | * Try to start the userspace helper if sending | |
201 | * the request failed the first time. | |
202 | */ | |
203 | err = uvesafb_helper_start(); | |
204 | if (err) { | |
a8feae09 JP |
205 | pr_err("failed to execute %s\n", v86d_path); |
206 | pr_err("make sure that the v86d helper is installed and executable\n"); | |
8bdb3a2d MJ |
207 | } else { |
208 | v86d_started = 1; | |
ac8f7330 | 209 | err = cn_netlink_send(m, 0, 0, gfp_any()); |
ff491a73 PNA |
210 | if (err == -ENOBUFS) |
211 | err = 0; | |
8bdb3a2d | 212 | } |
ff491a73 PNA |
213 | } else if (err == -ENOBUFS) |
214 | err = 0; | |
8bdb3a2d MJ |
215 | |
216 | if (!err && !(task->t.flags & TF_EXIT)) | |
217 | err = !wait_for_completion_timeout(task->done, | |
218 | msecs_to_jiffies(UVESAFB_TIMEOUT)); | |
219 | ||
220 | mutex_lock(&uvfb_lock); | |
221 | uvfb_tasks[seq] = NULL; | |
222 | mutex_unlock(&uvfb_lock); | |
223 | ||
224 | seq++; | |
225 | if (seq >= UVESAFB_TASKS_MAX) | |
226 | seq = 0; | |
60c1645d AM |
227 | out: |
228 | kfree(m); | |
8bdb3a2d MJ |
229 | return err; |
230 | } | |
231 | ||
232 | /* | |
233 | * Free a uvesafb_ktask struct. | |
234 | */ | |
235 | static void uvesafb_free(struct uvesafb_ktask *task) | |
236 | { | |
237 | if (task) { | |
b1dfee60 | 238 | kfree(task->done); |
8bdb3a2d MJ |
239 | kfree(task); |
240 | } | |
241 | } | |
242 | ||
243 | /* | |
244 | * Prepare a uvesafb_ktask struct to be used again. | |
245 | */ | |
246 | static void uvesafb_reset(struct uvesafb_ktask *task) | |
247 | { | |
248 | struct completion *cpl = task->done; | |
249 | ||
250 | memset(task, 0, sizeof(*task)); | |
251 | task->done = cpl; | |
252 | } | |
253 | ||
254 | /* | |
255 | * Allocate and prepare a uvesafb_ktask struct. | |
256 | */ | |
257 | static struct uvesafb_ktask *uvesafb_prep(void) | |
258 | { | |
259 | struct uvesafb_ktask *task; | |
260 | ||
261 | task = kzalloc(sizeof(*task), GFP_KERNEL); | |
262 | if (task) { | |
263 | task->done = kzalloc(sizeof(*task->done), GFP_KERNEL); | |
264 | if (!task->done) { | |
265 | kfree(task); | |
266 | task = NULL; | |
267 | } | |
268 | } | |
269 | return task; | |
270 | } | |
271 | ||
272 | static void uvesafb_setup_var(struct fb_var_screeninfo *var, | |
273 | struct fb_info *info, struct vbe_mode_ib *mode) | |
274 | { | |
275 | struct uvesafb_par *par = info->par; | |
276 | ||
277 | var->vmode = FB_VMODE_NONINTERLACED; | |
278 | var->sync = FB_SYNC_VERT_HIGH_ACT; | |
279 | ||
280 | var->xres = mode->x_res; | |
281 | var->yres = mode->y_res; | |
282 | var->xres_virtual = mode->x_res; | |
283 | var->yres_virtual = (par->ypan) ? | |
284 | info->fix.smem_len / mode->bytes_per_scan_line : | |
285 | mode->y_res; | |
286 | var->xoffset = 0; | |
287 | var->yoffset = 0; | |
288 | var->bits_per_pixel = mode->bits_per_pixel; | |
289 | ||
290 | if (var->bits_per_pixel == 15) | |
291 | var->bits_per_pixel = 16; | |
292 | ||
293 | if (var->bits_per_pixel > 8) { | |
294 | var->red.offset = mode->red_off; | |
295 | var->red.length = mode->red_len; | |
296 | var->green.offset = mode->green_off; | |
297 | var->green.length = mode->green_len; | |
298 | var->blue.offset = mode->blue_off; | |
299 | var->blue.length = mode->blue_len; | |
300 | var->transp.offset = mode->rsvd_off; | |
301 | var->transp.length = mode->rsvd_len; | |
302 | } else { | |
303 | var->red.offset = 0; | |
304 | var->green.offset = 0; | |
305 | var->blue.offset = 0; | |
306 | var->transp.offset = 0; | |
307 | ||
0ca1071f MJ |
308 | var->red.length = 8; |
309 | var->green.length = 8; | |
310 | var->blue.length = 8; | |
311 | var->transp.length = 0; | |
8bdb3a2d MJ |
312 | } |
313 | } | |
314 | ||
315 | static int uvesafb_vbe_find_mode(struct uvesafb_par *par, | |
316 | int xres, int yres, int depth, unsigned char flags) | |
317 | { | |
318 | int i, match = -1, h = 0, d = 0x7fffffff; | |
319 | ||
320 | for (i = 0; i < par->vbe_modes_cnt; i++) { | |
321 | h = abs(par->vbe_modes[i].x_res - xres) + | |
322 | abs(par->vbe_modes[i].y_res - yres) + | |
323 | abs(depth - par->vbe_modes[i].depth); | |
324 | ||
325 | /* | |
326 | * We have an exact match in terms of resolution | |
327 | * and depth. | |
328 | */ | |
329 | if (h == 0) | |
330 | return i; | |
331 | ||
332 | if (h < d || (h == d && par->vbe_modes[i].depth > depth)) { | |
333 | d = h; | |
334 | match = i; | |
335 | } | |
336 | } | |
337 | i = 1; | |
338 | ||
339 | if (flags & UVESAFB_EXACT_DEPTH && | |
340 | par->vbe_modes[match].depth != depth) | |
341 | i = 0; | |
342 | ||
343 | if (flags & UVESAFB_EXACT_RES && d > 24) | |
344 | i = 0; | |
345 | ||
346 | if (i != 0) | |
347 | return match; | |
348 | else | |
349 | return -1; | |
350 | } | |
351 | ||
352 | static u8 *uvesafb_vbe_state_save(struct uvesafb_par *par) | |
353 | { | |
354 | struct uvesafb_ktask *task; | |
355 | u8 *state; | |
356 | int err; | |
357 | ||
358 | if (!par->vbe_state_size) | |
359 | return NULL; | |
360 | ||
361 | state = kmalloc(par->vbe_state_size, GFP_KERNEL); | |
362 | if (!state) | |
c2bc0a75 | 363 | return ERR_PTR(-ENOMEM); |
8bdb3a2d MJ |
364 | |
365 | task = uvesafb_prep(); | |
366 | if (!task) { | |
367 | kfree(state); | |
368 | return NULL; | |
369 | } | |
370 | ||
371 | task->t.regs.eax = 0x4f04; | |
372 | task->t.regs.ecx = 0x000f; | |
373 | task->t.regs.edx = 0x0001; | |
374 | task->t.flags = TF_BUF_RET | TF_BUF_ESBX; | |
375 | task->t.buf_len = par->vbe_state_size; | |
376 | task->buf = state; | |
377 | err = uvesafb_exec(task); | |
378 | ||
379 | if (err || (task->t.regs.eax & 0xffff) != 0x004f) { | |
a8feae09 JP |
380 | pr_warn("VBE get state call failed (eax=0x%x, err=%d)\n", |
381 | task->t.regs.eax, err); | |
8bdb3a2d MJ |
382 | kfree(state); |
383 | state = NULL; | |
384 | } | |
385 | ||
386 | uvesafb_free(task); | |
387 | return state; | |
388 | } | |
389 | ||
390 | static void uvesafb_vbe_state_restore(struct uvesafb_par *par, u8 *state_buf) | |
391 | { | |
392 | struct uvesafb_ktask *task; | |
393 | int err; | |
394 | ||
395 | if (!state_buf) | |
396 | return; | |
397 | ||
398 | task = uvesafb_prep(); | |
399 | if (!task) | |
400 | return; | |
401 | ||
402 | task->t.regs.eax = 0x4f04; | |
403 | task->t.regs.ecx = 0x000f; | |
404 | task->t.regs.edx = 0x0002; | |
405 | task->t.buf_len = par->vbe_state_size; | |
406 | task->t.flags = TF_BUF_ESBX; | |
407 | task->buf = state_buf; | |
408 | ||
409 | err = uvesafb_exec(task); | |
410 | if (err || (task->t.regs.eax & 0xffff) != 0x004f) | |
a8feae09 JP |
411 | pr_warn("VBE state restore call failed (eax=0x%x, err=%d)\n", |
412 | task->t.regs.eax, err); | |
8bdb3a2d MJ |
413 | |
414 | uvesafb_free(task); | |
415 | } | |
416 | ||
48c68c4f GKH |
417 | static int uvesafb_vbe_getinfo(struct uvesafb_ktask *task, |
418 | struct uvesafb_par *par) | |
8bdb3a2d MJ |
419 | { |
420 | int err; | |
421 | ||
422 | task->t.regs.eax = 0x4f00; | |
423 | task->t.flags = TF_VBEIB; | |
424 | task->t.buf_len = sizeof(struct vbe_ib); | |
425 | task->buf = &par->vbe_ib; | |
5a15468b | 426 | memcpy(par->vbe_ib.vbe_signature, "VBE2", 4); |
8bdb3a2d MJ |
427 | |
428 | err = uvesafb_exec(task); | |
429 | if (err || (task->t.regs.eax & 0xffff) != 0x004f) { | |
a8feae09 JP |
430 | pr_err("Getting VBE info block failed (eax=0x%x, err=%d)\n", |
431 | (u32)task->t.regs.eax, err); | |
8bdb3a2d MJ |
432 | return -EINVAL; |
433 | } | |
434 | ||
435 | if (par->vbe_ib.vbe_version < 0x0200) { | |
a8feae09 | 436 | pr_err("Sorry, pre-VBE 2.0 cards are not supported\n"); |
8bdb3a2d MJ |
437 | return -EINVAL; |
438 | } | |
439 | ||
440 | if (!par->vbe_ib.mode_list_ptr) { | |
a8feae09 | 441 | pr_err("Missing mode list!\n"); |
8bdb3a2d MJ |
442 | return -EINVAL; |
443 | } | |
444 | ||
a8feae09 | 445 | pr_info(""); |
8bdb3a2d MJ |
446 | |
447 | /* | |
448 | * Convert string pointers and the mode list pointer into | |
449 | * usable addresses. Print informational messages about the | |
450 | * video adapter and its vendor. | |
451 | */ | |
452 | if (par->vbe_ib.oem_vendor_name_ptr) | |
a8feae09 | 453 | pr_cont("%s, ", |
8bdb3a2d MJ |
454 | ((char *)task->buf) + par->vbe_ib.oem_vendor_name_ptr); |
455 | ||
456 | if (par->vbe_ib.oem_product_name_ptr) | |
a8feae09 | 457 | pr_cont("%s, ", |
8bdb3a2d MJ |
458 | ((char *)task->buf) + par->vbe_ib.oem_product_name_ptr); |
459 | ||
460 | if (par->vbe_ib.oem_product_rev_ptr) | |
a8feae09 | 461 | pr_cont("%s, ", |
8bdb3a2d MJ |
462 | ((char *)task->buf) + par->vbe_ib.oem_product_rev_ptr); |
463 | ||
464 | if (par->vbe_ib.oem_string_ptr) | |
a8feae09 | 465 | pr_cont("OEM: %s, ", |
8bdb3a2d MJ |
466 | ((char *)task->buf) + par->vbe_ib.oem_string_ptr); |
467 | ||
a8feae09 JP |
468 | pr_cont("VBE v%d.%d\n", |
469 | (par->vbe_ib.vbe_version & 0xff00) >> 8, | |
470 | par->vbe_ib.vbe_version & 0xff); | |
8bdb3a2d MJ |
471 | |
472 | return 0; | |
473 | } | |
474 | ||
48c68c4f GKH |
475 | static int uvesafb_vbe_getmodes(struct uvesafb_ktask *task, |
476 | struct uvesafb_par *par) | |
8bdb3a2d MJ |
477 | { |
478 | int off = 0, err; | |
479 | u16 *mode; | |
480 | ||
481 | par->vbe_modes_cnt = 0; | |
482 | ||
483 | /* Count available modes. */ | |
484 | mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr); | |
485 | while (*mode != 0xffff) { | |
486 | par->vbe_modes_cnt++; | |
487 | mode++; | |
488 | } | |
489 | ||
6396bb22 KC |
490 | par->vbe_modes = kcalloc(par->vbe_modes_cnt, |
491 | sizeof(struct vbe_mode_ib), | |
492 | GFP_KERNEL); | |
8bdb3a2d MJ |
493 | if (!par->vbe_modes) |
494 | return -ENOMEM; | |
495 | ||
496 | /* Get info about all available modes. */ | |
497 | mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr); | |
498 | while (*mode != 0xffff) { | |
499 | struct vbe_mode_ib *mib; | |
500 | ||
501 | uvesafb_reset(task); | |
502 | task->t.regs.eax = 0x4f01; | |
503 | task->t.regs.ecx = (u32) *mode; | |
504 | task->t.flags = TF_BUF_RET | TF_BUF_ESDI; | |
505 | task->t.buf_len = sizeof(struct vbe_mode_ib); | |
506 | task->buf = par->vbe_modes + off; | |
507 | ||
508 | err = uvesafb_exec(task); | |
509 | if (err || (task->t.regs.eax & 0xffff) != 0x004f) { | |
a8feae09 | 510 | pr_warn("Getting mode info block for mode 0x%x failed (eax=0x%x, err=%d)\n", |
8bdb3a2d | 511 | *mode, (u32)task->t.regs.eax, err); |
9350cc90 MJ |
512 | mode++; |
513 | par->vbe_modes_cnt--; | |
514 | continue; | |
8bdb3a2d MJ |
515 | } |
516 | ||
517 | mib = task->buf; | |
518 | mib->mode_id = *mode; | |
519 | ||
520 | /* | |
521 | * We only want modes that are supported with the current | |
522 | * hardware configuration, color, graphics and that have | |
523 | * support for the LFB. | |
524 | */ | |
525 | if ((mib->mode_attr & VBE_MODE_MASK) == VBE_MODE_MASK && | |
526 | mib->bits_per_pixel >= 8) | |
527 | off++; | |
528 | else | |
529 | par->vbe_modes_cnt--; | |
530 | ||
531 | mode++; | |
532 | mib->depth = mib->red_len + mib->green_len + mib->blue_len; | |
533 | ||
534 | /* | |
535 | * Handle 8bpp modes and modes with broken color component | |
536 | * lengths. | |
537 | */ | |
538 | if (mib->depth == 0 || (mib->depth == 24 && | |
539 | mib->bits_per_pixel == 32)) | |
540 | mib->depth = mib->bits_per_pixel; | |
541 | } | |
542 | ||
9350cc90 MJ |
543 | if (par->vbe_modes_cnt > 0) |
544 | return 0; | |
545 | else | |
546 | return -EINVAL; | |
8bdb3a2d MJ |
547 | } |
548 | ||
549 | /* | |
550 | * The Protected Mode Interface is 32-bit x86 code, so we only run it on | |
551 | * x86 and not x86_64. | |
552 | */ | |
553 | #ifdef CONFIG_X86_32 | |
48c68c4f GKH |
554 | static int uvesafb_vbe_getpmi(struct uvesafb_ktask *task, |
555 | struct uvesafb_par *par) | |
8bdb3a2d MJ |
556 | { |
557 | int i, err; | |
558 | ||
559 | uvesafb_reset(task); | |
560 | task->t.regs.eax = 0x4f0a; | |
561 | task->t.regs.ebx = 0x0; | |
562 | err = uvesafb_exec(task); | |
7143c92b SR |
563 | if (err) |
564 | return err; | |
8bdb3a2d MJ |
565 | |
566 | if ((task->t.regs.eax & 0xffff) != 0x4f || task->t.regs.es < 0xc000) { | |
567 | par->pmi_setpal = par->ypan = 0; | |
568 | } else { | |
569 | par->pmi_base = (u16 *)phys_to_virt(((u32)task->t.regs.es << 4) | |
570 | + task->t.regs.edi); | |
571 | par->pmi_start = (u8 *)par->pmi_base + par->pmi_base[1]; | |
572 | par->pmi_pal = (u8 *)par->pmi_base + par->pmi_base[2]; | |
a8feae09 JP |
573 | pr_info("protected mode interface info at %04x:%04x\n", |
574 | (u16)task->t.regs.es, (u16)task->t.regs.edi); | |
575 | pr_info("pmi: set display start = %p, set palette = %p\n", | |
576 | par->pmi_start, par->pmi_pal); | |
8bdb3a2d MJ |
577 | |
578 | if (par->pmi_base[3]) { | |
a8feae09 | 579 | pr_info("pmi: ports ="); |
8bdb3a2d MJ |
580 | for (i = par->pmi_base[3]/2; |
581 | par->pmi_base[i] != 0xffff; i++) | |
a8feae09 JP |
582 | pr_cont(" %x", par->pmi_base[i]); |
583 | pr_cont("\n"); | |
8bdb3a2d MJ |
584 | |
585 | if (par->pmi_base[i] != 0xffff) { | |
a8feae09 | 586 | pr_info("can't handle memory requests, pmi disabled\n"); |
8bdb3a2d MJ |
587 | par->ypan = par->pmi_setpal = 0; |
588 | } | |
589 | } | |
590 | } | |
591 | return 0; | |
592 | } | |
593 | #endif /* CONFIG_X86_32 */ | |
594 | ||
595 | /* | |
596 | * Check whether a video mode is supported by the Video BIOS and is | |
597 | * compatible with the monitor limits. | |
598 | */ | |
48c68c4f GKH |
599 | static int uvesafb_is_valid_mode(struct fb_videomode *mode, |
600 | struct fb_info *info) | |
8bdb3a2d MJ |
601 | { |
602 | if (info->monspecs.gtf) { | |
603 | fb_videomode_to_var(&info->var, mode); | |
604 | if (fb_validate_mode(&info->var, info)) | |
605 | return 0; | |
606 | } | |
607 | ||
608 | if (uvesafb_vbe_find_mode(info->par, mode->xres, mode->yres, 8, | |
609 | UVESAFB_EXACT_RES) == -1) | |
610 | return 0; | |
611 | ||
612 | return 1; | |
613 | } | |
614 | ||
48c68c4f | 615 | static int uvesafb_vbe_getedid(struct uvesafb_ktask *task, struct fb_info *info) |
8bdb3a2d MJ |
616 | { |
617 | struct uvesafb_par *par = info->par; | |
618 | int err = 0; | |
619 | ||
620 | if (noedid || par->vbe_ib.vbe_version < 0x0300) | |
621 | return -EINVAL; | |
622 | ||
623 | task->t.regs.eax = 0x4f15; | |
624 | task->t.regs.ebx = 0; | |
625 | task->t.regs.ecx = 0; | |
626 | task->t.buf_len = 0; | |
627 | task->t.flags = 0; | |
628 | ||
629 | err = uvesafb_exec(task); | |
630 | ||
631 | if ((task->t.regs.eax & 0xffff) != 0x004f || err) | |
632 | return -EINVAL; | |
633 | ||
634 | if ((task->t.regs.ebx & 0x3) == 3) { | |
a8feae09 | 635 | pr_info("VBIOS/hardware supports both DDC1 and DDC2 transfers\n"); |
8bdb3a2d | 636 | } else if ((task->t.regs.ebx & 0x3) == 2) { |
a8feae09 | 637 | pr_info("VBIOS/hardware supports DDC2 transfers\n"); |
8bdb3a2d | 638 | } else if ((task->t.regs.ebx & 0x3) == 1) { |
a8feae09 | 639 | pr_info("VBIOS/hardware supports DDC1 transfers\n"); |
8bdb3a2d | 640 | } else { |
a8feae09 | 641 | pr_info("VBIOS/hardware doesn't support DDC transfers\n"); |
8bdb3a2d MJ |
642 | return -EINVAL; |
643 | } | |
644 | ||
645 | task->t.regs.eax = 0x4f15; | |
646 | task->t.regs.ebx = 1; | |
647 | task->t.regs.ecx = task->t.regs.edx = 0; | |
648 | task->t.flags = TF_BUF_RET | TF_BUF_ESDI; | |
649 | task->t.buf_len = EDID_LENGTH; | |
650 | task->buf = kzalloc(EDID_LENGTH, GFP_KERNEL); | |
7ed25867 WY |
651 | if (!task->buf) |
652 | return -ENOMEM; | |
8bdb3a2d MJ |
653 | |
654 | err = uvesafb_exec(task); | |
655 | ||
656 | if ((task->t.regs.eax & 0xffff) == 0x004f && !err) { | |
657 | fb_edid_to_monspecs(task->buf, &info->monspecs); | |
658 | ||
659 | if (info->monspecs.vfmax && info->monspecs.hfmax) { | |
660 | /* | |
661 | * If the maximum pixel clock wasn't specified in | |
662 | * the EDID block, set it to 300 MHz. | |
663 | */ | |
664 | if (info->monspecs.dclkmax == 0) | |
665 | info->monspecs.dclkmax = 300 * 1000000; | |
666 | info->monspecs.gtf = 1; | |
667 | } | |
668 | } else { | |
669 | err = -EINVAL; | |
670 | } | |
671 | ||
672 | kfree(task->buf); | |
673 | return err; | |
674 | } | |
675 | ||
48c68c4f GKH |
676 | static void uvesafb_vbe_getmonspecs(struct uvesafb_ktask *task, |
677 | struct fb_info *info) | |
8bdb3a2d MJ |
678 | { |
679 | struct uvesafb_par *par = info->par; | |
680 | int i; | |
681 | ||
682 | memset(&info->monspecs, 0, sizeof(info->monspecs)); | |
683 | ||
684 | /* | |
685 | * If we don't get all necessary data from the EDID block, | |
686 | * mark it as incompatible with the GTF and set nocrtc so | |
687 | * that we always use the default BIOS refresh rate. | |
688 | */ | |
689 | if (uvesafb_vbe_getedid(task, info)) { | |
690 | info->monspecs.gtf = 0; | |
691 | par->nocrtc = 1; | |
692 | } | |
693 | ||
694 | /* Kernel command line overrides. */ | |
695 | if (maxclk) | |
696 | info->monspecs.dclkmax = maxclk * 1000000; | |
697 | if (maxvf) | |
698 | info->monspecs.vfmax = maxvf; | |
699 | if (maxhf) | |
700 | info->monspecs.hfmax = maxhf * 1000; | |
701 | ||
702 | /* | |
703 | * In case DDC transfers are not supported, the user can provide | |
704 | * monitor limits manually. Lower limits are set to "safe" values. | |
705 | */ | |
706 | if (info->monspecs.gtf == 0 && maxclk && maxvf && maxhf) { | |
707 | info->monspecs.dclkmin = 0; | |
708 | info->monspecs.vfmin = 60; | |
709 | info->monspecs.hfmin = 29000; | |
710 | info->monspecs.gtf = 1; | |
711 | par->nocrtc = 0; | |
712 | } | |
713 | ||
714 | if (info->monspecs.gtf) | |
a8feae09 JP |
715 | pr_info("monitor limits: vf = %d Hz, hf = %d kHz, clk = %d MHz\n", |
716 | info->monspecs.vfmax, | |
8bdb3a2d MJ |
717 | (int)(info->monspecs.hfmax / 1000), |
718 | (int)(info->monspecs.dclkmax / 1000000)); | |
719 | else | |
a8feae09 | 720 | pr_info("no monitor limits have been set, default refresh rate will be used\n"); |
8bdb3a2d MJ |
721 | |
722 | /* Add VBE modes to the modelist. */ | |
723 | for (i = 0; i < par->vbe_modes_cnt; i++) { | |
724 | struct fb_var_screeninfo var; | |
725 | struct vbe_mode_ib *mode; | |
726 | struct fb_videomode vmode; | |
727 | ||
728 | mode = &par->vbe_modes[i]; | |
729 | memset(&var, 0, sizeof(var)); | |
730 | ||
731 | var.xres = mode->x_res; | |
732 | var.yres = mode->y_res; | |
733 | ||
734 | fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, &var, info); | |
735 | fb_var_to_videomode(&vmode, &var); | |
736 | fb_add_videomode(&vmode, &info->modelist); | |
737 | } | |
738 | ||
739 | /* Add valid VESA modes to our modelist. */ | |
740 | for (i = 0; i < VESA_MODEDB_SIZE; i++) { | |
741 | if (uvesafb_is_valid_mode((struct fb_videomode *) | |
742 | &vesa_modes[i], info)) | |
743 | fb_add_videomode(&vesa_modes[i], &info->modelist); | |
744 | } | |
745 | ||
746 | for (i = 0; i < info->monspecs.modedb_len; i++) { | |
747 | if (uvesafb_is_valid_mode(&info->monspecs.modedb[i], info)) | |
748 | fb_add_videomode(&info->monspecs.modedb[i], | |
749 | &info->modelist); | |
750 | } | |
751 | ||
752 | return; | |
753 | } | |
754 | ||
48c68c4f GKH |
755 | static void uvesafb_vbe_getstatesize(struct uvesafb_ktask *task, |
756 | struct uvesafb_par *par) | |
8bdb3a2d MJ |
757 | { |
758 | int err; | |
759 | ||
760 | uvesafb_reset(task); | |
761 | ||
762 | /* | |
763 | * Get the VBE state buffer size. We want all available | |
764 | * hardware state data (CL = 0x0f). | |
765 | */ | |
766 | task->t.regs.eax = 0x4f04; | |
767 | task->t.regs.ecx = 0x000f; | |
768 | task->t.regs.edx = 0x0000; | |
769 | task->t.flags = 0; | |
770 | ||
771 | err = uvesafb_exec(task); | |
772 | ||
773 | if (err || (task->t.regs.eax & 0xffff) != 0x004f) { | |
a8feae09 | 774 | pr_warn("VBE state buffer size cannot be determined (eax=0x%x, err=%d)\n", |
8bdb3a2d MJ |
775 | task->t.regs.eax, err); |
776 | par->vbe_state_size = 0; | |
777 | return; | |
778 | } | |
779 | ||
780 | par->vbe_state_size = 64 * (task->t.regs.ebx & 0xffff); | |
781 | } | |
782 | ||
48c68c4f | 783 | static int uvesafb_vbe_init(struct fb_info *info) |
8bdb3a2d MJ |
784 | { |
785 | struct uvesafb_ktask *task = NULL; | |
786 | struct uvesafb_par *par = info->par; | |
787 | int err; | |
788 | ||
789 | task = uvesafb_prep(); | |
790 | if (!task) | |
791 | return -ENOMEM; | |
792 | ||
793 | err = uvesafb_vbe_getinfo(task, par); | |
794 | if (err) | |
795 | goto out; | |
796 | ||
797 | err = uvesafb_vbe_getmodes(task, par); | |
798 | if (err) | |
799 | goto out; | |
800 | ||
801 | par->nocrtc = nocrtc; | |
802 | #ifdef CONFIG_X86_32 | |
803 | par->pmi_setpal = pmi_setpal; | |
804 | par->ypan = ypan; | |
805 | ||
b78f29ca WY |
806 | if (par->pmi_setpal || par->ypan) { |
807 | if (__supported_pte_mask & _PAGE_NX) { | |
808 | par->pmi_setpal = par->ypan = 0; | |
a8feae09 | 809 | pr_warn("NX protection is active, better not use the PMI\n"); |
b78f29ca WY |
810 | } else { |
811 | uvesafb_vbe_getpmi(task, par); | |
812 | } | |
813 | } | |
8bdb3a2d MJ |
814 | #else |
815 | /* The protected mode interface is not available on non-x86. */ | |
816 | par->pmi_setpal = par->ypan = 0; | |
817 | #endif | |
818 | ||
819 | INIT_LIST_HEAD(&info->modelist); | |
820 | uvesafb_vbe_getmonspecs(task, info); | |
821 | uvesafb_vbe_getstatesize(task, par); | |
822 | ||
823 | out: uvesafb_free(task); | |
824 | return err; | |
825 | } | |
826 | ||
48c68c4f | 827 | static int uvesafb_vbe_init_mode(struct fb_info *info) |
8bdb3a2d MJ |
828 | { |
829 | struct list_head *pos; | |
830 | struct fb_modelist *modelist; | |
831 | struct fb_videomode *mode; | |
832 | struct uvesafb_par *par = info->par; | |
833 | int i, modeid; | |
834 | ||
835 | /* Has the user requested a specific VESA mode? */ | |
836 | if (vbemode) { | |
837 | for (i = 0; i < par->vbe_modes_cnt; i++) { | |
838 | if (par->vbe_modes[i].mode_id == vbemode) { | |
23b73654 MJ |
839 | modeid = i; |
840 | uvesafb_setup_var(&info->var, info, | |
841 | &par->vbe_modes[modeid]); | |
8bdb3a2d | 842 | fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, |
23b73654 | 843 | &info->var, info); |
8bdb3a2d MJ |
844 | /* |
845 | * With pixclock set to 0, the default BIOS | |
846 | * timings will be used in set_par(). | |
847 | */ | |
848 | info->var.pixclock = 0; | |
8bdb3a2d MJ |
849 | goto gotmode; |
850 | } | |
851 | } | |
a8feae09 | 852 | pr_info("requested VBE mode 0x%x is unavailable\n", vbemode); |
8bdb3a2d MJ |
853 | vbemode = 0; |
854 | } | |
855 | ||
856 | /* Count the modes in the modelist */ | |
857 | i = 0; | |
858 | list_for_each(pos, &info->modelist) | |
859 | i++; | |
860 | ||
861 | /* | |
862 | * Convert the modelist into a modedb so that we can use it with | |
863 | * fb_find_mode(). | |
864 | */ | |
6396bb22 | 865 | mode = kcalloc(i, sizeof(*mode), GFP_KERNEL); |
8bdb3a2d MJ |
866 | if (mode) { |
867 | i = 0; | |
868 | list_for_each(pos, &info->modelist) { | |
869 | modelist = list_entry(pos, struct fb_modelist, list); | |
870 | mode[i] = modelist->mode; | |
871 | i++; | |
872 | } | |
873 | ||
874 | if (!mode_option) | |
875 | mode_option = UVESAFB_DEFAULT_MODE; | |
876 | ||
877 | i = fb_find_mode(&info->var, info, mode_option, mode, i, | |
878 | NULL, 8); | |
879 | ||
880 | kfree(mode); | |
881 | } | |
882 | ||
883 | /* fb_find_mode() failed */ | |
5e72b32d | 884 | if (i == 0) { |
8bdb3a2d MJ |
885 | info->var.xres = 640; |
886 | info->var.yres = 480; | |
887 | mode = (struct fb_videomode *) | |
888 | fb_find_best_mode(&info->var, &info->modelist); | |
889 | ||
890 | if (mode) { | |
891 | fb_videomode_to_var(&info->var, mode); | |
892 | } else { | |
893 | modeid = par->vbe_modes[0].mode_id; | |
23b73654 MJ |
894 | uvesafb_setup_var(&info->var, info, |
895 | &par->vbe_modes[modeid]); | |
8bdb3a2d | 896 | fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, |
23b73654 MJ |
897 | &info->var, info); |
898 | ||
8bdb3a2d MJ |
899 | goto gotmode; |
900 | } | |
901 | } | |
902 | ||
903 | /* Look for a matching VBE mode. */ | |
904 | modeid = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, | |
905 | info->var.bits_per_pixel, UVESAFB_EXACT_RES); | |
906 | ||
907 | if (modeid == -1) | |
908 | return -EINVAL; | |
909 | ||
8bdb3a2d MJ |
910 | uvesafb_setup_var(&info->var, info, &par->vbe_modes[modeid]); |
911 | ||
23b73654 | 912 | gotmode: |
8bdb3a2d MJ |
913 | /* |
914 | * If we are not VBE3.0+ compliant, we're done -- the BIOS will | |
915 | * ignore our timings anyway. | |
916 | */ | |
917 | if (par->vbe_ib.vbe_version < 0x0300 || par->nocrtc) | |
918 | fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, | |
919 | &info->var, info); | |
920 | ||
921 | return modeid; | |
922 | } | |
923 | ||
924 | static int uvesafb_setpalette(struct uvesafb_pal_entry *entries, int count, | |
925 | int start, struct fb_info *info) | |
926 | { | |
927 | struct uvesafb_ktask *task; | |
03ad369a | 928 | #ifdef CONFIG_X86 |
8bdb3a2d MJ |
929 | struct uvesafb_par *par = info->par; |
930 | int i = par->mode_idx; | |
03ad369a | 931 | #endif |
8bdb3a2d MJ |
932 | int err = 0; |
933 | ||
934 | /* | |
935 | * We support palette modifications for 8 bpp modes only, so | |
936 | * there can never be more than 256 entries. | |
937 | */ | |
938 | if (start + count > 256) | |
939 | return -EINVAL; | |
940 | ||
941 | #ifdef CONFIG_X86 | |
942 | /* Use VGA registers if mode is VGA-compatible. */ | |
943 | if (i >= 0 && i < par->vbe_modes_cnt && | |
944 | par->vbe_modes[i].mode_attr & VBE_MODE_VGACOMPAT) { | |
945 | for (i = 0; i < count; i++) { | |
946 | outb_p(start + i, dac_reg); | |
947 | outb_p(entries[i].red, dac_val); | |
948 | outb_p(entries[i].green, dac_val); | |
949 | outb_p(entries[i].blue, dac_val); | |
950 | } | |
951 | } | |
952 | #ifdef CONFIG_X86_32 | |
953 | else if (par->pmi_setpal) { | |
954 | __asm__ __volatile__( | |
955 | "call *(%%esi)" | |
956 | : /* no return value */ | |
957 | : "a" (0x4f09), /* EAX */ | |
958 | "b" (0), /* EBX */ | |
959 | "c" (count), /* ECX */ | |
960 | "d" (start), /* EDX */ | |
961 | "D" (entries), /* EDI */ | |
962 | "S" (&par->pmi_pal)); /* ESI */ | |
963 | } | |
964 | #endif /* CONFIG_X86_32 */ | |
965 | else | |
966 | #endif /* CONFIG_X86 */ | |
967 | { | |
968 | task = uvesafb_prep(); | |
969 | if (!task) | |
970 | return -ENOMEM; | |
971 | ||
972 | task->t.regs.eax = 0x4f09; | |
973 | task->t.regs.ebx = 0x0; | |
974 | task->t.regs.ecx = count; | |
975 | task->t.regs.edx = start; | |
976 | task->t.flags = TF_BUF_ESDI; | |
977 | task->t.buf_len = sizeof(struct uvesafb_pal_entry) * count; | |
978 | task->buf = entries; | |
979 | ||
980 | err = uvesafb_exec(task); | |
981 | if ((task->t.regs.eax & 0xffff) != 0x004f) | |
982 | err = 1; | |
983 | ||
984 | uvesafb_free(task); | |
985 | } | |
986 | return err; | |
987 | } | |
988 | ||
989 | static int uvesafb_setcolreg(unsigned regno, unsigned red, unsigned green, | |
990 | unsigned blue, unsigned transp, | |
991 | struct fb_info *info) | |
992 | { | |
993 | struct uvesafb_pal_entry entry; | |
0ca1071f | 994 | int shift = 16 - dac_width; |
8bdb3a2d MJ |
995 | int err = 0; |
996 | ||
997 | if (regno >= info->cmap.len) | |
998 | return -EINVAL; | |
999 | ||
1000 | if (info->var.bits_per_pixel == 8) { | |
1001 | entry.red = red >> shift; | |
1002 | entry.green = green >> shift; | |
1003 | entry.blue = blue >> shift; | |
1004 | entry.pad = 0; | |
1005 | ||
1006 | err = uvesafb_setpalette(&entry, 1, regno, info); | |
1007 | } else if (regno < 16) { | |
1008 | switch (info->var.bits_per_pixel) { | |
1009 | case 16: | |
1010 | if (info->var.red.offset == 10) { | |
1011 | /* 1:5:5:5 */ | |
1012 | ((u32 *) (info->pseudo_palette))[regno] = | |
1013 | ((red & 0xf800) >> 1) | | |
1014 | ((green & 0xf800) >> 6) | | |
1015 | ((blue & 0xf800) >> 11); | |
1016 | } else { | |
1017 | /* 0:5:6:5 */ | |
1018 | ((u32 *) (info->pseudo_palette))[regno] = | |
1019 | ((red & 0xf800) ) | | |
1020 | ((green & 0xfc00) >> 5) | | |
1021 | ((blue & 0xf800) >> 11); | |
1022 | } | |
1023 | break; | |
1024 | ||
1025 | case 24: | |
1026 | case 32: | |
1027 | red >>= 8; | |
1028 | green >>= 8; | |
1029 | blue >>= 8; | |
1030 | ((u32 *)(info->pseudo_palette))[regno] = | |
1031 | (red << info->var.red.offset) | | |
1032 | (green << info->var.green.offset) | | |
1033 | (blue << info->var.blue.offset); | |
1034 | break; | |
1035 | } | |
1036 | } | |
1037 | return err; | |
1038 | } | |
1039 | ||
1040 | static int uvesafb_setcmap(struct fb_cmap *cmap, struct fb_info *info) | |
1041 | { | |
1042 | struct uvesafb_pal_entry *entries; | |
0ca1071f | 1043 | int shift = 16 - dac_width; |
8bdb3a2d MJ |
1044 | int i, err = 0; |
1045 | ||
1046 | if (info->var.bits_per_pixel == 8) { | |
1047 | if (cmap->start + cmap->len > info->cmap.start + | |
1048 | info->cmap.len || cmap->start < info->cmap.start) | |
1049 | return -EINVAL; | |
1050 | ||
9f645bcc KC |
1051 | entries = kmalloc_array(cmap->len, sizeof(*entries), |
1052 | GFP_KERNEL); | |
8bdb3a2d MJ |
1053 | if (!entries) |
1054 | return -ENOMEM; | |
1055 | ||
1056 | for (i = 0; i < cmap->len; i++) { | |
1057 | entries[i].red = cmap->red[i] >> shift; | |
1058 | entries[i].green = cmap->green[i] >> shift; | |
1059 | entries[i].blue = cmap->blue[i] >> shift; | |
1060 | entries[i].pad = 0; | |
1061 | } | |
1062 | err = uvesafb_setpalette(entries, cmap->len, cmap->start, info); | |
1063 | kfree(entries); | |
1064 | } else { | |
1065 | /* | |
1066 | * For modes with bpp > 8, we only set the pseudo palette in | |
1067 | * the fb_info struct. We rely on uvesafb_setcolreg to do all | |
1068 | * sanity checking. | |
1069 | */ | |
1070 | for (i = 0; i < cmap->len; i++) { | |
1071 | err |= uvesafb_setcolreg(cmap->start + i, cmap->red[i], | |
1072 | cmap->green[i], cmap->blue[i], | |
1073 | 0, info); | |
1074 | } | |
1075 | } | |
1076 | return err; | |
1077 | } | |
1078 | ||
1079 | static int uvesafb_pan_display(struct fb_var_screeninfo *var, | |
1080 | struct fb_info *info) | |
1081 | { | |
1082 | #ifdef CONFIG_X86_32 | |
1083 | int offset; | |
1084 | struct uvesafb_par *par = info->par; | |
1085 | ||
1086 | offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4; | |
1087 | ||
1088 | /* | |
1089 | * It turns out it's not the best idea to do panning via vm86, | |
1090 | * so we only allow it if we have a PMI. | |
1091 | */ | |
1092 | if (par->pmi_start) { | |
1093 | __asm__ __volatile__( | |
1094 | "call *(%%edi)" | |
1095 | : /* no return value */ | |
1096 | : "a" (0x4f07), /* EAX */ | |
1097 | "b" (0), /* EBX */ | |
1098 | "c" (offset), /* ECX */ | |
1099 | "d" (offset >> 16), /* EDX */ | |
1100 | "D" (&par->pmi_start)); /* EDI */ | |
1101 | } | |
1102 | #endif | |
1103 | return 0; | |
1104 | } | |
1105 | ||
1106 | static int uvesafb_blank(int blank, struct fb_info *info) | |
1107 | { | |
8bdb3a2d MJ |
1108 | struct uvesafb_ktask *task; |
1109 | int err = 1; | |
8bdb3a2d | 1110 | #ifdef CONFIG_X86 |
03ad369a FL |
1111 | struct uvesafb_par *par = info->par; |
1112 | ||
8bdb3a2d MJ |
1113 | if (par->vbe_ib.capabilities & VBE_CAP_VGACOMPAT) { |
1114 | int loop = 10000; | |
1115 | u8 seq = 0, crtc17 = 0; | |
1116 | ||
1117 | if (blank == FB_BLANK_POWERDOWN) { | |
1118 | seq = 0x20; | |
1119 | crtc17 = 0x00; | |
1120 | err = 0; | |
1121 | } else { | |
1122 | seq = 0x00; | |
1123 | crtc17 = 0x80; | |
1124 | err = (blank == FB_BLANK_UNBLANK) ? 0 : -EINVAL; | |
1125 | } | |
1126 | ||
1127 | vga_wseq(NULL, 0x00, 0x01); | |
1128 | seq |= vga_rseq(NULL, 0x01) & ~0x20; | |
1129 | vga_wseq(NULL, 0x00, seq); | |
1130 | ||
1131 | crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80; | |
1132 | while (loop--); | |
1133 | vga_wcrt(NULL, 0x17, crtc17); | |
1134 | vga_wseq(NULL, 0x00, 0x03); | |
1135 | } else | |
1136 | #endif /* CONFIG_X86 */ | |
1137 | { | |
1138 | task = uvesafb_prep(); | |
1139 | if (!task) | |
1140 | return -ENOMEM; | |
1141 | ||
1142 | task->t.regs.eax = 0x4f10; | |
1143 | switch (blank) { | |
1144 | case FB_BLANK_UNBLANK: | |
1145 | task->t.regs.ebx = 0x0001; | |
1146 | break; | |
1147 | case FB_BLANK_NORMAL: | |
1148 | task->t.regs.ebx = 0x0101; /* standby */ | |
1149 | break; | |
1150 | case FB_BLANK_POWERDOWN: | |
1151 | task->t.regs.ebx = 0x0401; /* powerdown */ | |
1152 | break; | |
1153 | default: | |
1154 | goto out; | |
1155 | } | |
1156 | ||
1157 | err = uvesafb_exec(task); | |
1158 | if (err || (task->t.regs.eax & 0xffff) != 0x004f) | |
1159 | err = 1; | |
1160 | out: uvesafb_free(task); | |
1161 | } | |
1162 | return err; | |
1163 | } | |
1164 | ||
1165 | static int uvesafb_open(struct fb_info *info, int user) | |
1166 | { | |
1167 | struct uvesafb_par *par = info->par; | |
1168 | int cnt = atomic_read(&par->ref_count); | |
c2bc0a75 | 1169 | u8 *buf = NULL; |
8bdb3a2d | 1170 | |
c2bc0a75 WY |
1171 | if (!cnt && par->vbe_state_size) { |
1172 | buf = uvesafb_vbe_state_save(par); | |
1173 | if (IS_ERR(buf)) { | |
a8feae09 JP |
1174 | pr_warn("save hardware state failed, error code is %ld!\n", |
1175 | PTR_ERR(buf)); | |
c2bc0a75 WY |
1176 | } else { |
1177 | par->vbe_state_orig = buf; | |
1178 | } | |
1179 | } | |
8bdb3a2d MJ |
1180 | |
1181 | atomic_inc(&par->ref_count); | |
1182 | return 0; | |
1183 | } | |
1184 | ||
1185 | static int uvesafb_release(struct fb_info *info, int user) | |
1186 | { | |
1187 | struct uvesafb_ktask *task = NULL; | |
1188 | struct uvesafb_par *par = info->par; | |
1189 | int cnt = atomic_read(&par->ref_count); | |
1190 | ||
1191 | if (!cnt) | |
1192 | return -EINVAL; | |
1193 | ||
1194 | if (cnt != 1) | |
1195 | goto out; | |
1196 | ||
1197 | task = uvesafb_prep(); | |
1198 | if (!task) | |
1199 | goto out; | |
1200 | ||
1201 | /* First, try to set the standard 80x25 text mode. */ | |
1202 | task->t.regs.eax = 0x0003; | |
1203 | uvesafb_exec(task); | |
1204 | ||
1205 | /* | |
1206 | * Now try to restore whatever hardware state we might have | |
1207 | * saved when the fb device was first opened. | |
1208 | */ | |
1209 | uvesafb_vbe_state_restore(par, par->vbe_state_orig); | |
1210 | out: | |
1211 | atomic_dec(&par->ref_count); | |
e87d9f29 | 1212 | uvesafb_free(task); |
8bdb3a2d MJ |
1213 | return 0; |
1214 | } | |
1215 | ||
1216 | static int uvesafb_set_par(struct fb_info *info) | |
1217 | { | |
1218 | struct uvesafb_par *par = info->par; | |
1219 | struct uvesafb_ktask *task = NULL; | |
1220 | struct vbe_crtc_ib *crtc = NULL; | |
1221 | struct vbe_mode_ib *mode = NULL; | |
1222 | int i, err = 0, depth = info->var.bits_per_pixel; | |
1223 | ||
1224 | if (depth > 8 && depth != 32) | |
1225 | depth = info->var.red.length + info->var.green.length + | |
1226 | info->var.blue.length; | |
1227 | ||
1228 | i = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, depth, | |
1229 | UVESAFB_EXACT_RES | UVESAFB_EXACT_DEPTH); | |
1230 | if (i >= 0) | |
1231 | mode = &par->vbe_modes[i]; | |
1232 | else | |
1233 | return -EINVAL; | |
1234 | ||
1235 | task = uvesafb_prep(); | |
1236 | if (!task) | |
1237 | return -ENOMEM; | |
1238 | setmode: | |
1239 | task->t.regs.eax = 0x4f02; | |
1240 | task->t.regs.ebx = mode->mode_id | 0x4000; /* use LFB */ | |
1241 | ||
1242 | if (par->vbe_ib.vbe_version >= 0x0300 && !par->nocrtc && | |
1243 | info->var.pixclock != 0) { | |
1244 | task->t.regs.ebx |= 0x0800; /* use CRTC data */ | |
1245 | task->t.flags = TF_BUF_ESDI; | |
1246 | crtc = kzalloc(sizeof(struct vbe_crtc_ib), GFP_KERNEL); | |
1247 | if (!crtc) { | |
1248 | err = -ENOMEM; | |
1249 | goto out; | |
1250 | } | |
1251 | crtc->horiz_start = info->var.xres + info->var.right_margin; | |
1252 | crtc->horiz_end = crtc->horiz_start + info->var.hsync_len; | |
1253 | crtc->horiz_total = crtc->horiz_end + info->var.left_margin; | |
1254 | ||
1255 | crtc->vert_start = info->var.yres + info->var.lower_margin; | |
1256 | crtc->vert_end = crtc->vert_start + info->var.vsync_len; | |
1257 | crtc->vert_total = crtc->vert_end + info->var.upper_margin; | |
1258 | ||
1259 | crtc->pixel_clock = PICOS2KHZ(info->var.pixclock) * 1000; | |
1260 | crtc->refresh_rate = (u16)(100 * (crtc->pixel_clock / | |
1261 | (crtc->vert_total * crtc->horiz_total))); | |
1262 | ||
1263 | if (info->var.vmode & FB_VMODE_DOUBLE) | |
1264 | crtc->flags |= 0x1; | |
1265 | if (info->var.vmode & FB_VMODE_INTERLACED) | |
1266 | crtc->flags |= 0x2; | |
1267 | if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT)) | |
1268 | crtc->flags |= 0x4; | |
1269 | if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT)) | |
1270 | crtc->flags |= 0x8; | |
1271 | memcpy(&par->crtc, crtc, sizeof(*crtc)); | |
1272 | } else { | |
1273 | memset(&par->crtc, 0, sizeof(*crtc)); | |
1274 | } | |
1275 | ||
1276 | task->t.buf_len = sizeof(struct vbe_crtc_ib); | |
1277 | task->buf = &par->crtc; | |
1278 | ||
1279 | err = uvesafb_exec(task); | |
1280 | if (err || (task->t.regs.eax & 0xffff) != 0x004f) { | |
1281 | /* | |
1282 | * The mode switch might have failed because we tried to | |
1283 | * use our own timings. Try again with the default timings. | |
1284 | */ | |
1285 | if (crtc != NULL) { | |
a8feae09 JP |
1286 | pr_warn("mode switch failed (eax=0x%x, err=%d) - trying again with default timings\n", |
1287 | task->t.regs.eax, err); | |
8bdb3a2d MJ |
1288 | uvesafb_reset(task); |
1289 | kfree(crtc); | |
1290 | crtc = NULL; | |
1291 | info->var.pixclock = 0; | |
1292 | goto setmode; | |
1293 | } else { | |
a8feae09 JP |
1294 | pr_err("mode switch failed (eax=0x%x, err=%d)\n", |
1295 | task->t.regs.eax, err); | |
8bdb3a2d MJ |
1296 | err = -EINVAL; |
1297 | goto out; | |
1298 | } | |
1299 | } | |
1300 | par->mode_idx = i; | |
1301 | ||
1302 | /* For 8bpp modes, always try to set the DAC to 8 bits. */ | |
1303 | if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC && | |
1304 | mode->bits_per_pixel <= 8) { | |
1305 | uvesafb_reset(task); | |
1306 | task->t.regs.eax = 0x4f08; | |
1307 | task->t.regs.ebx = 0x0800; | |
1308 | ||
1309 | err = uvesafb_exec(task); | |
1310 | if (err || (task->t.regs.eax & 0xffff) != 0x004f || | |
1311 | ((task->t.regs.ebx & 0xff00) >> 8) != 8) { | |
0ca1071f MJ |
1312 | dac_width = 6; |
1313 | } else { | |
1314 | dac_width = 8; | |
8bdb3a2d MJ |
1315 | } |
1316 | } | |
1317 | ||
1318 | info->fix.visual = (info->var.bits_per_pixel == 8) ? | |
1319 | FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR; | |
1320 | info->fix.line_length = mode->bytes_per_scan_line; | |
1321 | ||
b1dfee60 SK |
1322 | out: |
1323 | kfree(crtc); | |
8bdb3a2d MJ |
1324 | uvesafb_free(task); |
1325 | ||
1326 | return err; | |
1327 | } | |
1328 | ||
1329 | static void uvesafb_check_limits(struct fb_var_screeninfo *var, | |
1330 | struct fb_info *info) | |
1331 | { | |
1332 | const struct fb_videomode *mode; | |
1333 | struct uvesafb_par *par = info->par; | |
1334 | ||
1335 | /* | |
1336 | * If pixclock is set to 0, then we're using default BIOS timings | |
1337 | * and thus don't have to perform any checks here. | |
1338 | */ | |
1339 | if (!var->pixclock) | |
1340 | return; | |
1341 | ||
1342 | if (par->vbe_ib.vbe_version < 0x0300) { | |
1343 | fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, var, info); | |
1344 | return; | |
1345 | } | |
1346 | ||
1347 | if (!fb_validate_mode(var, info)) | |
1348 | return; | |
1349 | ||
1350 | mode = fb_find_best_mode(var, &info->modelist); | |
1351 | if (mode) { | |
1352 | if (mode->xres == var->xres && mode->yres == var->yres && | |
1353 | !(mode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))) { | |
1354 | fb_videomode_to_var(var, mode); | |
1355 | return; | |
1356 | } | |
1357 | } | |
1358 | ||
1359 | if (info->monspecs.gtf && !fb_get_mode(FB_MAXTIMINGS, 0, var, info)) | |
1360 | return; | |
1361 | /* Use default refresh rate */ | |
1362 | var->pixclock = 0; | |
1363 | } | |
1364 | ||
1365 | static int uvesafb_check_var(struct fb_var_screeninfo *var, | |
1366 | struct fb_info *info) | |
1367 | { | |
1368 | struct uvesafb_par *par = info->par; | |
1369 | struct vbe_mode_ib *mode = NULL; | |
1370 | int match = -1; | |
1371 | int depth = var->red.length + var->green.length + var->blue.length; | |
1372 | ||
1373 | /* | |
1374 | * Various apps will use bits_per_pixel to set the color depth, | |
1375 | * which is theoretically incorrect, but which we'll try to handle | |
1376 | * here. | |
1377 | */ | |
1378 | if (depth == 0 || abs(depth - var->bits_per_pixel) >= 8) | |
1379 | depth = var->bits_per_pixel; | |
1380 | ||
1381 | match = uvesafb_vbe_find_mode(par, var->xres, var->yres, depth, | |
1382 | UVESAFB_EXACT_RES); | |
1383 | if (match == -1) | |
1384 | return -EINVAL; | |
1385 | ||
1386 | mode = &par->vbe_modes[match]; | |
1387 | uvesafb_setup_var(var, info, mode); | |
1388 | ||
1389 | /* | |
1390 | * Check whether we have remapped enough memory for this mode. | |
1391 | * We might be called at an early stage, when we haven't remapped | |
1392 | * any memory yet, in which case we simply skip the check. | |
1393 | */ | |
1394 | if (var->yres * mode->bytes_per_scan_line > info->fix.smem_len | |
1395 | && info->fix.smem_len) | |
1396 | return -EINVAL; | |
1397 | ||
1398 | if ((var->vmode & FB_VMODE_DOUBLE) && | |
1399 | !(par->vbe_modes[match].mode_attr & 0x100)) | |
1400 | var->vmode &= ~FB_VMODE_DOUBLE; | |
1401 | ||
1402 | if ((var->vmode & FB_VMODE_INTERLACED) && | |
1403 | !(par->vbe_modes[match].mode_attr & 0x200)) | |
1404 | var->vmode &= ~FB_VMODE_INTERLACED; | |
1405 | ||
1406 | uvesafb_check_limits(var, info); | |
1407 | ||
1408 | var->xres_virtual = var->xres; | |
1409 | var->yres_virtual = (par->ypan) ? | |
1410 | info->fix.smem_len / mode->bytes_per_scan_line : | |
1411 | var->yres; | |
1412 | return 0; | |
1413 | } | |
1414 | ||
8bdb3a2d MJ |
1415 | static struct fb_ops uvesafb_ops = { |
1416 | .owner = THIS_MODULE, | |
1417 | .fb_open = uvesafb_open, | |
1418 | .fb_release = uvesafb_release, | |
f96c3629 | 1419 | FB_DEFAULT_IOMEM_OPS, |
8bdb3a2d MJ |
1420 | .fb_setcolreg = uvesafb_setcolreg, |
1421 | .fb_setcmap = uvesafb_setcmap, | |
1422 | .fb_pan_display = uvesafb_pan_display, | |
1423 | .fb_blank = uvesafb_blank, | |
8bdb3a2d MJ |
1424 | .fb_check_var = uvesafb_check_var, |
1425 | .fb_set_par = uvesafb_set_par, | |
8bdb3a2d MJ |
1426 | }; |
1427 | ||
48c68c4f | 1428 | static void uvesafb_init_info(struct fb_info *info, struct vbe_mode_ib *mode) |
8bdb3a2d MJ |
1429 | { |
1430 | unsigned int size_vmode; | |
1431 | unsigned int size_remap; | |
1432 | unsigned int size_total; | |
1433 | struct uvesafb_par *par = info->par; | |
1434 | int i, h; | |
1435 | ||
1436 | info->pseudo_palette = ((u8 *)info->par + sizeof(struct uvesafb_par)); | |
1437 | info->fix = uvesafb_fix; | |
1438 | info->fix.ypanstep = par->ypan ? 1 : 0; | |
1439 | info->fix.ywrapstep = (par->ypan > 1) ? 1 : 0; | |
1440 | ||
8bdb3a2d MJ |
1441 | /* Disable blanking if the user requested so. */ |
1442 | if (!blank) | |
1b78e72b | 1443 | uvesafb_ops.fb_blank = NULL; |
8bdb3a2d MJ |
1444 | |
1445 | /* | |
1446 | * Find out how much IO memory is required for the mode with | |
1447 | * the highest resolution. | |
1448 | */ | |
1449 | size_remap = 0; | |
1450 | for (i = 0; i < par->vbe_modes_cnt; i++) { | |
1451 | h = par->vbe_modes[i].bytes_per_scan_line * | |
1452 | par->vbe_modes[i].y_res; | |
1453 | if (h > size_remap) | |
1454 | size_remap = h; | |
1455 | } | |
1456 | size_remap *= 2; | |
1457 | ||
1458 | /* | |
1459 | * size_vmode -- that is the amount of memory needed for the | |
1460 | * used video mode, i.e. the minimum amount of | |
1461 | * memory we need. | |
1462 | */ | |
92559977 | 1463 | size_vmode = info->var.yres * mode->bytes_per_scan_line; |
8bdb3a2d MJ |
1464 | |
1465 | /* | |
1466 | * size_total -- all video memory we have. Used for mtrr | |
1467 | * entries, resource allocation and bounds | |
1468 | * checking. | |
1469 | */ | |
1470 | size_total = par->vbe_ib.total_memory * 65536; | |
1471 | if (vram_total) | |
1472 | size_total = vram_total * 1024 * 1024; | |
1473 | if (size_total < size_vmode) | |
1474 | size_total = size_vmode; | |
1475 | ||
1476 | /* | |
1477 | * size_remap -- the amount of video memory we are going to | |
1478 | * use for vesafb. With modern cards it is no | |
1479 | * option to simply use size_total as th | |
1480 | * wastes plenty of kernel address space. | |
1481 | */ | |
1482 | if (vram_remap) | |
1483 | size_remap = vram_remap * 1024 * 1024; | |
1484 | if (size_remap < size_vmode) | |
1485 | size_remap = size_vmode; | |
1486 | if (size_remap > size_total) | |
1487 | size_remap = size_total; | |
1488 | ||
1489 | info->fix.smem_len = size_remap; | |
1490 | info->fix.smem_start = mode->phys_base_ptr; | |
1491 | ||
1492 | /* | |
1493 | * We have to set yres_virtual here because when setup_var() was | |
1494 | * called, smem_len wasn't defined yet. | |
1495 | */ | |
1496 | info->var.yres_virtual = info->fix.smem_len / | |
1497 | mode->bytes_per_scan_line; | |
1498 | ||
1499 | if (par->ypan && info->var.yres_virtual > info->var.yres) { | |
a8feae09 | 1500 | pr_info("scrolling: %s using protected mode interface, yres_virtual=%d\n", |
8bdb3a2d MJ |
1501 | (par->ypan > 1) ? "ywrap" : "ypan", |
1502 | info->var.yres_virtual); | |
1503 | } else { | |
a8feae09 | 1504 | pr_info("scrolling: redraw\n"); |
8bdb3a2d MJ |
1505 | info->var.yres_virtual = info->var.yres; |
1506 | par->ypan = 0; | |
1507 | } | |
1508 | ||
8a4675eb | 1509 | info->flags = (par->ypan ? FBINFO_HWACCEL_YPAN : 0); |
8bdb3a2d MJ |
1510 | |
1511 | if (!par->ypan) | |
1b78e72b | 1512 | uvesafb_ops.fb_pan_display = NULL; |
8bdb3a2d MJ |
1513 | } |
1514 | ||
48c68c4f | 1515 | static void uvesafb_init_mtrr(struct fb_info *info) |
8bdb3a2d | 1516 | { |
63e28a7a AL |
1517 | struct uvesafb_par *par = info->par; |
1518 | ||
8bdb3a2d MJ |
1519 | if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) { |
1520 | int temp_size = info->fix.smem_len; | |
8bdb3a2d | 1521 | |
63e28a7a | 1522 | int rc; |
8bdb3a2d | 1523 | |
63e28a7a AL |
1524 | /* Find the largest power-of-two */ |
1525 | temp_size = roundup_pow_of_two(temp_size); | |
8bdb3a2d | 1526 | |
63e28a7a AL |
1527 | /* Try and find a power of two to add */ |
1528 | do { | |
1529 | rc = arch_phys_wc_add(info->fix.smem_start, temp_size); | |
1530 | temp_size >>= 1; | |
1531 | } while (temp_size >= PAGE_SIZE && rc == -EINVAL); | |
8bdb3a2d | 1532 | |
63e28a7a AL |
1533 | if (rc >= 0) |
1534 | par->mtrr_handle = rc; | |
8bdb3a2d | 1535 | } |
8bdb3a2d MJ |
1536 | } |
1537 | ||
48c68c4f | 1538 | static void uvesafb_ioremap(struct fb_info *info) |
803a4e14 | 1539 | { |
63e28a7a | 1540 | info->screen_base = ioremap_wc(info->fix.smem_start, info->fix.smem_len); |
803a4e14 | 1541 | } |
8bdb3a2d MJ |
1542 | |
1543 | static ssize_t uvesafb_show_vbe_ver(struct device *dev, | |
1544 | struct device_attribute *attr, char *buf) | |
1545 | { | |
d4a56117 | 1546 | struct fb_info *info = dev_get_drvdata(dev); |
8bdb3a2d MJ |
1547 | struct uvesafb_par *par = info->par; |
1548 | ||
1549 | return snprintf(buf, PAGE_SIZE, "%.4x\n", par->vbe_ib.vbe_version); | |
1550 | } | |
1551 | ||
1552 | static DEVICE_ATTR(vbe_version, S_IRUGO, uvesafb_show_vbe_ver, NULL); | |
1553 | ||
1554 | static ssize_t uvesafb_show_vbe_modes(struct device *dev, | |
1555 | struct device_attribute *attr, char *buf) | |
1556 | { | |
d4a56117 | 1557 | struct fb_info *info = dev_get_drvdata(dev); |
8bdb3a2d MJ |
1558 | struct uvesafb_par *par = info->par; |
1559 | int ret = 0, i; | |
1560 | ||
1561 | for (i = 0; i < par->vbe_modes_cnt && ret < PAGE_SIZE; i++) { | |
06b522d6 | 1562 | ret += scnprintf(buf + ret, PAGE_SIZE - ret, |
8bdb3a2d MJ |
1563 | "%dx%d-%d, 0x%.4x\n", |
1564 | par->vbe_modes[i].x_res, par->vbe_modes[i].y_res, | |
1565 | par->vbe_modes[i].depth, par->vbe_modes[i].mode_id); | |
1566 | } | |
1567 | ||
1568 | return ret; | |
1569 | } | |
1570 | ||
1571 | static DEVICE_ATTR(vbe_modes, S_IRUGO, uvesafb_show_vbe_modes, NULL); | |
1572 | ||
1573 | static ssize_t uvesafb_show_vendor(struct device *dev, | |
1574 | struct device_attribute *attr, char *buf) | |
1575 | { | |
d4a56117 | 1576 | struct fb_info *info = dev_get_drvdata(dev); |
8bdb3a2d MJ |
1577 | struct uvesafb_par *par = info->par; |
1578 | ||
1579 | if (par->vbe_ib.oem_vendor_name_ptr) | |
522d5226 | 1580 | return sysfs_emit(buf, "%s\n", (char *) |
8bdb3a2d MJ |
1581 | (&par->vbe_ib) + par->vbe_ib.oem_vendor_name_ptr); |
1582 | else | |
1583 | return 0; | |
1584 | } | |
1585 | ||
1586 | static DEVICE_ATTR(oem_vendor, S_IRUGO, uvesafb_show_vendor, NULL); | |
1587 | ||
1588 | static ssize_t uvesafb_show_product_name(struct device *dev, | |
1589 | struct device_attribute *attr, char *buf) | |
1590 | { | |
d4a56117 | 1591 | struct fb_info *info = dev_get_drvdata(dev); |
8bdb3a2d MJ |
1592 | struct uvesafb_par *par = info->par; |
1593 | ||
1594 | if (par->vbe_ib.oem_product_name_ptr) | |
522d5226 | 1595 | return sysfs_emit(buf, "%s\n", (char *) |
8bdb3a2d MJ |
1596 | (&par->vbe_ib) + par->vbe_ib.oem_product_name_ptr); |
1597 | else | |
1598 | return 0; | |
1599 | } | |
1600 | ||
1601 | static DEVICE_ATTR(oem_product_name, S_IRUGO, uvesafb_show_product_name, NULL); | |
1602 | ||
1603 | static ssize_t uvesafb_show_product_rev(struct device *dev, | |
1604 | struct device_attribute *attr, char *buf) | |
1605 | { | |
d4a56117 | 1606 | struct fb_info *info = dev_get_drvdata(dev); |
8bdb3a2d MJ |
1607 | struct uvesafb_par *par = info->par; |
1608 | ||
1609 | if (par->vbe_ib.oem_product_rev_ptr) | |
522d5226 | 1610 | return sysfs_emit(buf, "%s\n", (char *) |
8bdb3a2d MJ |
1611 | (&par->vbe_ib) + par->vbe_ib.oem_product_rev_ptr); |
1612 | else | |
1613 | return 0; | |
1614 | } | |
1615 | ||
1616 | static DEVICE_ATTR(oem_product_rev, S_IRUGO, uvesafb_show_product_rev, NULL); | |
1617 | ||
1618 | static ssize_t uvesafb_show_oem_string(struct device *dev, | |
1619 | struct device_attribute *attr, char *buf) | |
1620 | { | |
d4a56117 | 1621 | struct fb_info *info = dev_get_drvdata(dev); |
8bdb3a2d MJ |
1622 | struct uvesafb_par *par = info->par; |
1623 | ||
1624 | if (par->vbe_ib.oem_string_ptr) | |
522d5226 | 1625 | return sysfs_emit(buf, "%s\n", |
8bdb3a2d MJ |
1626 | (char *)(&par->vbe_ib) + par->vbe_ib.oem_string_ptr); |
1627 | else | |
1628 | return 0; | |
1629 | } | |
1630 | ||
1631 | static DEVICE_ATTR(oem_string, S_IRUGO, uvesafb_show_oem_string, NULL); | |
1632 | ||
1633 | static ssize_t uvesafb_show_nocrtc(struct device *dev, | |
1634 | struct device_attribute *attr, char *buf) | |
1635 | { | |
d4a56117 | 1636 | struct fb_info *info = dev_get_drvdata(dev); |
8bdb3a2d MJ |
1637 | struct uvesafb_par *par = info->par; |
1638 | ||
522d5226 | 1639 | return sysfs_emit(buf, "%d\n", par->nocrtc); |
8bdb3a2d MJ |
1640 | } |
1641 | ||
1642 | static ssize_t uvesafb_store_nocrtc(struct device *dev, | |
1643 | struct device_attribute *attr, const char *buf, size_t count) | |
1644 | { | |
d4a56117 | 1645 | struct fb_info *info = dev_get_drvdata(dev); |
8bdb3a2d MJ |
1646 | struct uvesafb_par *par = info->par; |
1647 | ||
1648 | if (count > 0) { | |
1649 | if (buf[0] == '0') | |
1650 | par->nocrtc = 0; | |
1651 | else | |
1652 | par->nocrtc = 1; | |
1653 | } | |
1654 | return count; | |
1655 | } | |
1656 | ||
1657 | static DEVICE_ATTR(nocrtc, S_IRUGO | S_IWUSR, uvesafb_show_nocrtc, | |
1658 | uvesafb_store_nocrtc); | |
1659 | ||
1660 | static struct attribute *uvesafb_dev_attrs[] = { | |
1661 | &dev_attr_vbe_version.attr, | |
1662 | &dev_attr_vbe_modes.attr, | |
1663 | &dev_attr_oem_vendor.attr, | |
1664 | &dev_attr_oem_product_name.attr, | |
1665 | &dev_attr_oem_product_rev.attr, | |
1666 | &dev_attr_oem_string.attr, | |
1667 | &dev_attr_nocrtc.attr, | |
1668 | NULL, | |
1669 | }; | |
1670 | ||
884e4960 | 1671 | static const struct attribute_group uvesafb_dev_attgrp = { |
8bdb3a2d MJ |
1672 | .name = NULL, |
1673 | .attrs = uvesafb_dev_attrs, | |
1674 | }; | |
1675 | ||
48c68c4f | 1676 | static int uvesafb_probe(struct platform_device *dev) |
8bdb3a2d MJ |
1677 | { |
1678 | struct fb_info *info; | |
1679 | struct vbe_mode_ib *mode = NULL; | |
1680 | struct uvesafb_par *par; | |
1681 | int err = 0, i; | |
1682 | ||
1683 | info = framebuffer_alloc(sizeof(*par) + sizeof(u32) * 256, &dev->dev); | |
1684 | if (!info) | |
1685 | return -ENOMEM; | |
1686 | ||
1687 | par = info->par; | |
1688 | ||
1689 | err = uvesafb_vbe_init(info); | |
1690 | if (err) { | |
a8feae09 | 1691 | pr_err("vbe_init() failed with %d\n", err); |
8bdb3a2d MJ |
1692 | goto out; |
1693 | } | |
1694 | ||
1695 | info->fbops = &uvesafb_ops; | |
1696 | ||
1697 | i = uvesafb_vbe_init_mode(info); | |
1698 | if (i < 0) { | |
1699 | err = -EINVAL; | |
1700 | goto out; | |
1701 | } else { | |
1702 | mode = &par->vbe_modes[i]; | |
1703 | } | |
1704 | ||
1705 | if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) { | |
1706 | err = -ENXIO; | |
1707 | goto out; | |
1708 | } | |
1709 | ||
1710 | uvesafb_init_info(info, mode); | |
1711 | ||
803a4e14 | 1712 | if (!request_region(0x3c0, 32, "uvesafb")) { |
a8feae09 | 1713 | pr_err("request region 0x3c0-0x3e0 failed\n"); |
803a4e14 TS |
1714 | err = -EIO; |
1715 | goto out_mode; | |
1716 | } | |
1717 | ||
8bdb3a2d MJ |
1718 | if (!request_mem_region(info->fix.smem_start, info->fix.smem_len, |
1719 | "uvesafb")) { | |
a8feae09 JP |
1720 | pr_err("cannot reserve video memory at 0x%lx\n", |
1721 | info->fix.smem_start); | |
8bdb3a2d | 1722 | err = -EIO; |
803a4e14 | 1723 | goto out_reg; |
8bdb3a2d MJ |
1724 | } |
1725 | ||
803a4e14 TS |
1726 | uvesafb_init_mtrr(info); |
1727 | uvesafb_ioremap(info); | |
8bdb3a2d MJ |
1728 | |
1729 | if (!info->screen_base) { | |
a8feae09 JP |
1730 | pr_err("abort, cannot ioremap 0x%x bytes of video memory at 0x%lx\n", |
1731 | info->fix.smem_len, info->fix.smem_start); | |
8bdb3a2d MJ |
1732 | err = -EIO; |
1733 | goto out_mem; | |
1734 | } | |
1735 | ||
8bdb3a2d MJ |
1736 | platform_set_drvdata(dev, info); |
1737 | ||
1738 | if (register_framebuffer(info) < 0) { | |
a8feae09 | 1739 | pr_err("failed to register framebuffer device\n"); |
8bdb3a2d | 1740 | err = -EINVAL; |
803a4e14 | 1741 | goto out_unmap; |
8bdb3a2d MJ |
1742 | } |
1743 | ||
a8feae09 JP |
1744 | pr_info("framebuffer at 0x%lx, mapped to 0x%p, using %dk, total %dk\n", |
1745 | info->fix.smem_start, info->screen_base, | |
1746 | info->fix.smem_len / 1024, par->vbe_ib.total_memory * 64); | |
31b6780c | 1747 | fb_info(info, "%s frame buffer device\n", info->fix.id); |
8bdb3a2d MJ |
1748 | |
1749 | err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp); | |
1750 | if (err != 0) | |
31b6780c | 1751 | fb_warn(info, "failed to register attributes\n"); |
8bdb3a2d MJ |
1752 | |
1753 | return 0; | |
1754 | ||
8bdb3a2d MJ |
1755 | out_unmap: |
1756 | iounmap(info->screen_base); | |
1757 | out_mem: | |
a9437104 | 1758 | arch_phys_wc_del(par->mtrr_handle); |
8bdb3a2d | 1759 | release_mem_region(info->fix.smem_start, info->fix.smem_len); |
803a4e14 TS |
1760 | out_reg: |
1761 | release_region(0x3c0, 32); | |
8bdb3a2d MJ |
1762 | out_mode: |
1763 | if (!list_empty(&info->modelist)) | |
1764 | fb_destroy_modelist(&info->modelist); | |
1765 | fb_destroy_modedb(info->monspecs.modedb); | |
1766 | fb_dealloc_cmap(&info->cmap); | |
1767 | out: | |
b1dfee60 | 1768 | kfree(par->vbe_modes); |
8bdb3a2d MJ |
1769 | |
1770 | framebuffer_release(info); | |
1771 | return err; | |
1772 | } | |
1773 | ||
94bada58 | 1774 | static void uvesafb_remove(struct platform_device *dev) |
8bdb3a2d MJ |
1775 | { |
1776 | struct fb_info *info = platform_get_drvdata(dev); | |
f2ff0c43 | 1777 | struct uvesafb_par *par = info->par; |
8bdb3a2d | 1778 | |
f2ff0c43 CJ |
1779 | sysfs_remove_group(&dev->dev.kobj, &uvesafb_dev_attgrp); |
1780 | unregister_framebuffer(info); | |
1781 | release_region(0x3c0, 32); | |
1782 | iounmap(info->screen_base); | |
1783 | arch_phys_wc_del(par->mtrr_handle); | |
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); | |
8bdb3a2d | 1787 | |
f2ff0c43 CJ |
1788 | kfree(par->vbe_modes); |
1789 | kfree(par->vbe_state_orig); | |
1790 | kfree(par->vbe_state_saved); | |
8bdb3a2d | 1791 | |
f2ff0c43 | 1792 | framebuffer_release(info); |
8bdb3a2d MJ |
1793 | } |
1794 | ||
1795 | static struct platform_driver uvesafb_driver = { | |
1796 | .probe = uvesafb_probe, | |
94bada58 | 1797 | .remove_new = uvesafb_remove, |
8bdb3a2d MJ |
1798 | .driver = { |
1799 | .name = "uvesafb", | |
1800 | }, | |
1801 | }; | |
1802 | ||
1803 | static struct platform_device *uvesafb_device; | |
1804 | ||
1805 | #ifndef MODULE | |
48c68c4f | 1806 | static int uvesafb_setup(char *options) |
8bdb3a2d MJ |
1807 | { |
1808 | char *this_opt; | |
1809 | ||
1810 | if (!options || !*options) | |
1811 | return 0; | |
1812 | ||
1813 | while ((this_opt = strsep(&options, ",")) != NULL) { | |
1814 | if (!*this_opt) continue; | |
1815 | ||
1816 | if (!strcmp(this_opt, "redraw")) | |
1817 | ypan = 0; | |
1818 | else if (!strcmp(this_opt, "ypan")) | |
1819 | ypan = 1; | |
1820 | else if (!strcmp(this_opt, "ywrap")) | |
1821 | ypan = 2; | |
1822 | else if (!strcmp(this_opt, "vgapal")) | |
dbc7ece1 | 1823 | pmi_setpal = false; |
8bdb3a2d | 1824 | else if (!strcmp(this_opt, "pmipal")) |
dbc7ece1 | 1825 | pmi_setpal = true; |
8bdb3a2d MJ |
1826 | else if (!strncmp(this_opt, "mtrr:", 5)) |
1827 | mtrr = simple_strtoul(this_opt+5, NULL, 0); | |
1828 | else if (!strcmp(this_opt, "nomtrr")) | |
1829 | mtrr = 0; | |
1830 | else if (!strcmp(this_opt, "nocrtc")) | |
dbc7ece1 | 1831 | nocrtc = true; |
8bdb3a2d | 1832 | else if (!strcmp(this_opt, "noedid")) |
dbc7ece1 | 1833 | noedid = true; |
8bdb3a2d | 1834 | else if (!strcmp(this_opt, "noblank")) |
7f757cb6 | 1835 | blank = false; |
8bdb3a2d MJ |
1836 | else if (!strncmp(this_opt, "vtotal:", 7)) |
1837 | vram_total = simple_strtoul(this_opt + 7, NULL, 0); | |
1838 | else if (!strncmp(this_opt, "vremap:", 7)) | |
1839 | vram_remap = simple_strtoul(this_opt + 7, NULL, 0); | |
1840 | else if (!strncmp(this_opt, "maxhf:", 6)) | |
1841 | maxhf = simple_strtoul(this_opt + 6, NULL, 0); | |
1842 | else if (!strncmp(this_opt, "maxvf:", 6)) | |
1843 | maxvf = simple_strtoul(this_opt + 6, NULL, 0); | |
1844 | else if (!strncmp(this_opt, "maxclk:", 7)) | |
1845 | maxclk = simple_strtoul(this_opt + 7, NULL, 0); | |
1846 | else if (!strncmp(this_opt, "vbemode:", 8)) | |
1847 | vbemode = simple_strtoul(this_opt + 8, NULL, 0); | |
1848 | else if (this_opt[0] >= '0' && this_opt[0] <= '9') { | |
1849 | mode_option = this_opt; | |
1850 | } else { | |
a8feae09 | 1851 | pr_warn("unrecognized option %s\n", this_opt); |
8bdb3a2d MJ |
1852 | } |
1853 | } | |
1854 | ||
d1ce3d54 | 1855 | if (mtrr != 3 && mtrr != 0) |
63e28a7a AL |
1856 | pr_warn("uvesafb: mtrr should be set to 0 or 3; %d is unsupported", mtrr); |
1857 | ||
8bdb3a2d MJ |
1858 | return 0; |
1859 | } | |
1860 | #endif /* !MODULE */ | |
1861 | ||
b5f0dc7b | 1862 | static ssize_t v86d_show(struct device_driver *dev, char *buf) |
8bdb3a2d MJ |
1863 | { |
1864 | return snprintf(buf, PAGE_SIZE, "%s\n", v86d_path); | |
1865 | } | |
1866 | ||
b5f0dc7b | 1867 | static ssize_t v86d_store(struct device_driver *dev, const char *buf, |
8bdb3a2d MJ |
1868 | size_t count) |
1869 | { | |
5a15468b | 1870 | strncpy(v86d_path, buf, PATH_MAX - 1); |
8bdb3a2d MJ |
1871 | return count; |
1872 | } | |
b5f0dc7b | 1873 | static DRIVER_ATTR_RW(v86d); |
8bdb3a2d | 1874 | |
48c68c4f | 1875 | static int uvesafb_init(void) |
8bdb3a2d MJ |
1876 | { |
1877 | int err; | |
1878 | ||
1879 | #ifndef MODULE | |
1880 | char *option = NULL; | |
1881 | ||
1882 | if (fb_get_options("uvesafb", &option)) | |
1883 | return -ENODEV; | |
1884 | uvesafb_setup(option); | |
1885 | #endif | |
1886 | err = cn_add_callback(&uvesafb_cn_id, "uvesafb", uvesafb_cn_callback); | |
1887 | if (err) | |
1888 | return err; | |
1889 | ||
1890 | err = platform_driver_register(&uvesafb_driver); | |
1891 | ||
1892 | if (!err) { | |
1893 | uvesafb_device = platform_device_alloc("uvesafb", 0); | |
1894 | if (uvesafb_device) | |
1895 | err = platform_device_add(uvesafb_device); | |
1896 | else | |
1897 | err = -ENOMEM; | |
1898 | ||
1899 | if (err) { | |
34685627 | 1900 | platform_device_put(uvesafb_device); |
8bdb3a2d MJ |
1901 | platform_driver_unregister(&uvesafb_driver); |
1902 | cn_del_callback(&uvesafb_cn_id); | |
1903 | return err; | |
1904 | } | |
1905 | ||
1906 | err = driver_create_file(&uvesafb_driver.driver, | |
1907 | &driver_attr_v86d); | |
1908 | if (err) { | |
a8feae09 | 1909 | pr_warn("failed to register attributes\n"); |
8bdb3a2d MJ |
1910 | err = 0; |
1911 | } | |
1912 | } | |
1913 | return err; | |
1914 | } | |
1915 | ||
1916 | module_init(uvesafb_init); | |
1917 | ||
48c68c4f | 1918 | static void uvesafb_exit(void) |
8bdb3a2d MJ |
1919 | { |
1920 | struct uvesafb_ktask *task; | |
1921 | ||
1922 | if (v86d_started) { | |
1923 | task = uvesafb_prep(); | |
1924 | if (task) { | |
1925 | task->t.flags = TF_EXIT; | |
1926 | uvesafb_exec(task); | |
1927 | uvesafb_free(task); | |
1928 | } | |
1929 | } | |
1930 | ||
8bdb3a2d MJ |
1931 | driver_remove_file(&uvesafb_driver.driver, &driver_attr_v86d); |
1932 | platform_device_unregister(uvesafb_device); | |
1933 | platform_driver_unregister(&uvesafb_driver); | |
1022e7e2 | 1934 | cn_del_callback(&uvesafb_cn_id); |
8bdb3a2d MJ |
1935 | } |
1936 | ||
1937 | module_exit(uvesafb_exit); | |
1938 | ||
9bbb9e5a | 1939 | static int param_set_scroll(const char *val, const struct kernel_param *kp) |
8bdb3a2d MJ |
1940 | { |
1941 | ypan = 0; | |
1942 | ||
1943 | if (!strcmp(val, "redraw")) | |
1944 | ypan = 0; | |
1945 | else if (!strcmp(val, "ypan")) | |
1946 | ypan = 1; | |
1947 | else if (!strcmp(val, "ywrap")) | |
1948 | ypan = 2; | |
2ead9439 RR |
1949 | else |
1950 | return -EINVAL; | |
8bdb3a2d MJ |
1951 | |
1952 | return 0; | |
1953 | } | |
9c27847d | 1954 | static const struct kernel_param_ops param_ops_scroll = { |
9bbb9e5a RR |
1955 | .set = param_set_scroll, |
1956 | }; | |
5eb03a4a | 1957 | #define param_check_scroll(name, p) __param_check(name, p, void) |
8bdb3a2d MJ |
1958 | |
1959 | module_param_named(scroll, ypan, scroll, 0); | |
1960 | MODULE_PARM_DESC(scroll, | |
5eb03a4a | 1961 | "Scrolling mode, set to 'redraw', 'ypan', or 'ywrap'"); |
8bdb3a2d MJ |
1962 | module_param_named(vgapal, pmi_setpal, invbool, 0); |
1963 | MODULE_PARM_DESC(vgapal, "Set palette using VGA registers"); | |
1964 | module_param_named(pmipal, pmi_setpal, bool, 0); | |
1965 | MODULE_PARM_DESC(pmipal, "Set palette using PMI calls"); | |
1966 | module_param(mtrr, uint, 0); | |
1967 | MODULE_PARM_DESC(mtrr, | |
1968 | "Memory Type Range Registers setting. Use 0 to disable."); | |
1969 | module_param(blank, bool, 0); | |
1970 | MODULE_PARM_DESC(blank, "Enable hardware blanking"); | |
1971 | module_param(nocrtc, bool, 0); | |
1972 | MODULE_PARM_DESC(nocrtc, "Ignore CRTC timings when setting modes"); | |
1973 | module_param(noedid, bool, 0); | |
1974 | MODULE_PARM_DESC(noedid, | |
1975 | "Ignore EDID-provided monitor limits when setting modes"); | |
1976 | module_param(vram_remap, uint, 0); | |
1977 | MODULE_PARM_DESC(vram_remap, "Set amount of video memory to be used [MiB]"); | |
1978 | module_param(vram_total, uint, 0); | |
e0f5628b | 1979 | MODULE_PARM_DESC(vram_total, "Set total amount of video memory [MiB]"); |
8bdb3a2d MJ |
1980 | module_param(maxclk, ushort, 0); |
1981 | MODULE_PARM_DESC(maxclk, "Maximum pixelclock [MHz], overrides EDID data"); | |
1982 | module_param(maxhf, ushort, 0); | |
1983 | MODULE_PARM_DESC(maxhf, | |
1984 | "Maximum horizontal frequency [kHz], overrides EDID data"); | |
1985 | module_param(maxvf, ushort, 0); | |
1986 | MODULE_PARM_DESC(maxvf, | |
1987 | "Maximum vertical frequency [Hz], overrides EDID data"); | |
012e2609 KH |
1988 | module_param(mode_option, charp, 0); |
1989 | MODULE_PARM_DESC(mode_option, | |
8bdb3a2d MJ |
1990 | "Specify initial video mode as \"<xres>x<yres>[-<bpp>][@<refresh>]\""); |
1991 | module_param(vbemode, ushort, 0); | |
1992 | MODULE_PARM_DESC(vbemode, | |
1993 | "VBE mode number to set, overrides the 'mode' option"); | |
1994 | module_param_string(v86d, v86d_path, PATH_MAX, 0660); | |
1995 | MODULE_PARM_DESC(v86d, "Path to the v86d userspace helper."); | |
1996 | ||
1997 | MODULE_LICENSE("GPL"); | |
1998 | MODULE_AUTHOR("Michal Januszewski <spock@gentoo.org>"); | |
1999 | MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards"); | |
2000 |