Commit | Line | Data |
---|---|---|
8bdb3a2d MJ |
1 | /* |
2 | * A framebuffer driver for VBE 2.0+ compliant video cards | |
3 | * | |
4 | * (c) 2007 Michal Januszewski <spock@gentoo.org> | |
5 | * Loosely based upon the vesafb driver. | |
6 | * | |
7 | */ | |
a8feae09 JP |
8 | |
9 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
10 | ||
8bdb3a2d MJ |
11 | #include <linux/init.h> |
12 | #include <linux/module.h> | |
13 | #include <linux/moduleparam.h> | |
14 | #include <linux/skbuff.h> | |
15 | #include <linux/timer.h> | |
16 | #include <linux/completion.h> | |
17 | #include <linux/connector.h> | |
18 | #include <linux/random.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/limits.h> | |
21 | #include <linux/fb.h> | |
22 | #include <linux/io.h> | |
23 | #include <linux/mutex.h> | |
5a0e3ad6 | 24 | #include <linux/slab.h> |
8bdb3a2d MJ |
25 | #include <video/edid.h> |
26 | #include <video/uvesafb.h> | |
27 | #ifdef CONFIG_X86 | |
28 | #include <video/vga.h> | |
29 | #endif | |
8bdb3a2d MJ |
30 | #include "edid.h" |
31 | ||
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 | ||
ca9384c5 | 39 | static const struct fb_fix_screeninfo uvesafb_fix = { |
8bdb3a2d MJ |
40 | .id = "VESA VGA", |
41 | .type = FB_TYPE_PACKED_PIXELS, | |
42 | .accel = FB_ACCEL_NONE, | |
43 | .visual = FB_VISUAL_TRUECOLOR, | |
44 | }; | |
45 | ||
48c68c4f GKH |
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; | |
0ca1071f | 59 | static u8 dac_width = 6; |
8bdb3a2d MJ |
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 | */ | |
7069331d | 71 | static void uvesafb_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp) |
8bdb3a2d | 72 | { |
8bdb3a2d MJ |
73 | struct uvesafb_task *utask; |
74 | struct uvesafb_ktask *task; | |
75 | ||
38bf1953 | 76 | if (!capable(CAP_SYS_ADMIN)) |
cc44578b PR |
77 | return; |
78 | ||
8bdb3a2d MJ |
79 | if (msg->seq >= UVESAFB_TASKS_MAX) |
80 | return; | |
81 | ||
82 | mutex_lock(&uvfb_lock); | |
83 | task = uvfb_tasks[msg->seq]; | |
84 | ||
85 | if (!task || msg->ack != task->ack) { | |
86 | mutex_unlock(&uvfb_lock); | |
87 | return; | |
88 | } | |
89 | ||
90 | utask = (struct uvesafb_task *)msg->data; | |
91 | ||
92 | /* Sanity checks for the buffer length. */ | |
93 | if (task->t.buf_len < utask->buf_len || | |
94 | utask->buf_len > msg->len - sizeof(*utask)) { | |
95 | mutex_unlock(&uvfb_lock); | |
96 | return; | |
97 | } | |
98 | ||
99 | uvfb_tasks[msg->seq] = NULL; | |
100 | mutex_unlock(&uvfb_lock); | |
101 | ||
102 | memcpy(&task->t, utask, sizeof(*utask)); | |
103 | ||
104 | if (task->t.buf_len && task->buf) | |
105 | memcpy(task->buf, utask + 1, task->t.buf_len); | |
106 | ||
107 | complete(task->done); | |
108 | return; | |
109 | } | |
110 | ||
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 | ||
70834d30 | 124 | return call_usermodehelper(v86d_path, argv, envp, UMH_WAIT_PROC); |
8bdb3a2d MJ |
125 | } |
126 | ||
127 | /* | |
128 | * Execute a uvesafb task. | |
129 | * | |
130 | * Returns 0 if the task is executed successfully. | |
131 | * | |
132 | * A message sent to the userspace consists of the uvesafb_task | |
133 | * struct and (optionally) a buffer. The uvesafb_task struct is | |
134 | * a simplified version of uvesafb_ktask (its kernel counterpart) | |
135 | * containing only the register values, flags and the length of | |
136 | * the buffer. | |
137 | * | |
138 | * Each message is assigned a sequence number (increased linearly) | |
139 | * and a random ack number. The sequence number is used as a key | |
140 | * for the uvfb_tasks array which holds pointers to uvesafb_ktask | |
141 | * structs for all requests. | |
142 | */ | |
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) { | |
a8feae09 JP |
155 | pr_warn("message too long (%d), can't execute task\n", |
156 | (int)(sizeof(*m) + len)); | |
8bdb3a2d MJ |
157 | return -E2BIG; |
158 | } | |
159 | ||
160 | m = kzalloc(sizeof(*m) + len, GFP_KERNEL); | |
161 | if (!m) | |
162 | return -ENOMEM; | |
163 | ||
164 | init_completion(task->done); | |
165 | ||
166 | memcpy(&m->id, &uvesafb_cn_id, sizeof(m->id)); | |
167 | m->seq = seq; | |
168 | m->len = len; | |
314f8477 | 169 | m->ack = prandom_u32(); |
8bdb3a2d MJ |
170 | |
171 | /* uvesafb_task structure */ | |
172 | memcpy(m + 1, &task->t, sizeof(task->t)); | |
173 | ||
174 | /* Buffer */ | |
175 | memcpy((u8 *)(m + 1) + sizeof(task->t), task->buf, task->t.buf_len); | |
176 | ||
177 | /* | |
178 | * Save the message ack number so that we can find the kernel | |
179 | * part of this task when a reply is received from userspace. | |
180 | */ | |
181 | task->ack = m->ack; | |
182 | ||
183 | mutex_lock(&uvfb_lock); | |
184 | ||
185 | /* If all slots are taken -- bail out. */ | |
186 | if (uvfb_tasks[seq]) { | |
187 | mutex_unlock(&uvfb_lock); | |
60c1645d AM |
188 | err = -EBUSY; |
189 | goto out; | |
8bdb3a2d MJ |
190 | } |
191 | ||
192 | /* Save a pointer to the kernel part of the task struct. */ | |
193 | uvfb_tasks[seq] = task; | |
194 | mutex_unlock(&uvfb_lock); | |
195 | ||
ac8f7330 | 196 | err = cn_netlink_send(m, 0, 0, GFP_KERNEL); |
8bdb3a2d MJ |
197 | if (err == -ESRCH) { |
198 | /* | |
199 | * Try to start the userspace helper if sending | |
200 | * the request failed the first time. | |
201 | */ | |
202 | err = uvesafb_helper_start(); | |
203 | if (err) { | |
a8feae09 JP |
204 | pr_err("failed to execute %s\n", v86d_path); |
205 | pr_err("make sure that the v86d helper is installed and executable\n"); | |
8bdb3a2d MJ |
206 | } else { |
207 | v86d_started = 1; | |
ac8f7330 | 208 | err = cn_netlink_send(m, 0, 0, gfp_any()); |
ff491a73 PNA |
209 | if (err == -ENOBUFS) |
210 | err = 0; | |
8bdb3a2d | 211 | } |
ff491a73 PNA |
212 | } else if (err == -ENOBUFS) |
213 | err = 0; | |
8bdb3a2d MJ |
214 | |
215 | if (!err && !(task->t.flags & TF_EXIT)) | |
216 | err = !wait_for_completion_timeout(task->done, | |
217 | msecs_to_jiffies(UVESAFB_TIMEOUT)); | |
218 | ||
219 | mutex_lock(&uvfb_lock); | |
220 | uvfb_tasks[seq] = NULL; | |
221 | mutex_unlock(&uvfb_lock); | |
222 | ||
223 | seq++; | |
224 | if (seq >= UVESAFB_TASKS_MAX) | |
225 | seq = 0; | |
60c1645d AM |
226 | out: |
227 | kfree(m); | |
8bdb3a2d MJ |
228 | return err; |
229 | } | |
230 | ||
231 | /* | |
232 | * Free a uvesafb_ktask struct. | |
233 | */ | |
234 | static void uvesafb_free(struct uvesafb_ktask *task) | |
235 | { | |
236 | if (task) { | |
b1dfee60 | 237 | kfree(task->done); |
8bdb3a2d MJ |
238 | kfree(task); |
239 | } | |
240 | } | |
241 | ||
242 | /* | |
243 | * Prepare a uvesafb_ktask struct to be used again. | |
244 | */ | |
245 | static void uvesafb_reset(struct uvesafb_ktask *task) | |
246 | { | |
247 | struct completion *cpl = task->done; | |
248 | ||
249 | memset(task, 0, sizeof(*task)); | |
250 | task->done = cpl; | |
251 | } | |
252 | ||
253 | /* | |
254 | * Allocate and prepare a uvesafb_ktask struct. | |
255 | */ | |
256 | static struct uvesafb_ktask *uvesafb_prep(void) | |
257 | { | |
258 | struct uvesafb_ktask *task; | |
259 | ||
260 | task = kzalloc(sizeof(*task), GFP_KERNEL); | |
261 | if (task) { | |
262 | task->done = kzalloc(sizeof(*task->done), GFP_KERNEL); | |
263 | if (!task->done) { | |
264 | kfree(task); | |
265 | task = NULL; | |
266 | } | |
267 | } | |
268 | return task; | |
269 | } | |
270 | ||
271 | static void uvesafb_setup_var(struct fb_var_screeninfo *var, | |
272 | struct fb_info *info, struct vbe_mode_ib *mode) | |
273 | { | |
274 | struct uvesafb_par *par = info->par; | |
275 | ||
276 | var->vmode = FB_VMODE_NONINTERLACED; | |
277 | var->sync = FB_SYNC_VERT_HIGH_ACT; | |
278 | ||
279 | var->xres = mode->x_res; | |
280 | var->yres = mode->y_res; | |
281 | var->xres_virtual = mode->x_res; | |
282 | var->yres_virtual = (par->ypan) ? | |
283 | info->fix.smem_len / mode->bytes_per_scan_line : | |
284 | mode->y_res; | |
285 | var->xoffset = 0; | |
286 | var->yoffset = 0; | |
287 | var->bits_per_pixel = mode->bits_per_pixel; | |
288 | ||
289 | if (var->bits_per_pixel == 15) | |
290 | var->bits_per_pixel = 16; | |
291 | ||
292 | if (var->bits_per_pixel > 8) { | |
293 | var->red.offset = mode->red_off; | |
294 | var->red.length = mode->red_len; | |
295 | var->green.offset = mode->green_off; | |
296 | var->green.length = mode->green_len; | |
297 | var->blue.offset = mode->blue_off; | |
298 | var->blue.length = mode->blue_len; | |
299 | var->transp.offset = mode->rsvd_off; | |
300 | var->transp.length = mode->rsvd_len; | |
301 | } else { | |
302 | var->red.offset = 0; | |
303 | var->green.offset = 0; | |
304 | var->blue.offset = 0; | |
305 | var->transp.offset = 0; | |
306 | ||
0ca1071f MJ |
307 | var->red.length = 8; |
308 | var->green.length = 8; | |
309 | var->blue.length = 8; | |
310 | var->transp.length = 0; | |
8bdb3a2d MJ |
311 | } |
312 | } | |
313 | ||
314 | static int uvesafb_vbe_find_mode(struct uvesafb_par *par, | |
315 | int xres, int yres, int depth, unsigned char flags) | |
316 | { | |
317 | int i, match = -1, h = 0, d = 0x7fffffff; | |
318 | ||
319 | for (i = 0; i < par->vbe_modes_cnt; i++) { | |
320 | h = abs(par->vbe_modes[i].x_res - xres) + | |
321 | abs(par->vbe_modes[i].y_res - yres) + | |
322 | abs(depth - par->vbe_modes[i].depth); | |
323 | ||
324 | /* | |
325 | * We have an exact match in terms of resolution | |
326 | * and depth. | |
327 | */ | |
328 | if (h == 0) | |
329 | return i; | |
330 | ||
331 | if (h < d || (h == d && par->vbe_modes[i].depth > depth)) { | |
332 | d = h; | |
333 | match = i; | |
334 | } | |
335 | } | |
336 | i = 1; | |
337 | ||
338 | if (flags & UVESAFB_EXACT_DEPTH && | |
339 | par->vbe_modes[match].depth != depth) | |
340 | i = 0; | |
341 | ||
342 | if (flags & UVESAFB_EXACT_RES && d > 24) | |
343 | i = 0; | |
344 | ||
345 | if (i != 0) | |
346 | return match; | |
347 | else | |
348 | return -1; | |
349 | } | |
350 | ||
351 | static u8 *uvesafb_vbe_state_save(struct uvesafb_par *par) | |
352 | { | |
353 | struct uvesafb_ktask *task; | |
354 | u8 *state; | |
355 | int err; | |
356 | ||
357 | if (!par->vbe_state_size) | |
358 | return NULL; | |
359 | ||
360 | state = kmalloc(par->vbe_state_size, GFP_KERNEL); | |
361 | if (!state) | |
c2bc0a75 | 362 | return ERR_PTR(-ENOMEM); |
8bdb3a2d MJ |
363 | |
364 | task = uvesafb_prep(); | |
365 | if (!task) { | |
366 | kfree(state); | |
367 | return NULL; | |
368 | } | |
369 | ||
370 | task->t.regs.eax = 0x4f04; | |
371 | task->t.regs.ecx = 0x000f; | |
372 | task->t.regs.edx = 0x0001; | |
373 | task->t.flags = TF_BUF_RET | TF_BUF_ESBX; | |
374 | task->t.buf_len = par->vbe_state_size; | |
375 | task->buf = state; | |
376 | err = uvesafb_exec(task); | |
377 | ||
378 | if (err || (task->t.regs.eax & 0xffff) != 0x004f) { | |
a8feae09 JP |
379 | pr_warn("VBE get state call failed (eax=0x%x, err=%d)\n", |
380 | task->t.regs.eax, err); | |
8bdb3a2d MJ |
381 | kfree(state); |
382 | state = NULL; | |
383 | } | |
384 | ||
385 | uvesafb_free(task); | |
386 | return state; | |
387 | } | |
388 | ||
389 | static void uvesafb_vbe_state_restore(struct uvesafb_par *par, u8 *state_buf) | |
390 | { | |
391 | struct uvesafb_ktask *task; | |
392 | int err; | |
393 | ||
394 | if (!state_buf) | |
395 | return; | |
396 | ||
397 | task = uvesafb_prep(); | |
398 | if (!task) | |
399 | return; | |
400 | ||
401 | task->t.regs.eax = 0x4f04; | |
402 | task->t.regs.ecx = 0x000f; | |
403 | task->t.regs.edx = 0x0002; | |
404 | task->t.buf_len = par->vbe_state_size; | |
405 | task->t.flags = TF_BUF_ESBX; | |
406 | task->buf = state_buf; | |
407 | ||
408 | err = uvesafb_exec(task); | |
409 | if (err || (task->t.regs.eax & 0xffff) != 0x004f) | |
a8feae09 JP |
410 | pr_warn("VBE state restore call failed (eax=0x%x, err=%d)\n", |
411 | task->t.regs.eax, err); | |
8bdb3a2d MJ |
412 | |
413 | uvesafb_free(task); | |
414 | } | |
415 | ||
48c68c4f GKH |
416 | static int uvesafb_vbe_getinfo(struct uvesafb_ktask *task, |
417 | struct uvesafb_par *par) | |
8bdb3a2d MJ |
418 | { |
419 | int err; | |
420 | ||
421 | task->t.regs.eax = 0x4f00; | |
422 | task->t.flags = TF_VBEIB; | |
423 | task->t.buf_len = sizeof(struct vbe_ib); | |
424 | task->buf = &par->vbe_ib; | |
425 | strncpy(par->vbe_ib.vbe_signature, "VBE2", 4); | |
426 | ||
427 | err = uvesafb_exec(task); | |
428 | if (err || (task->t.regs.eax & 0xffff) != 0x004f) { | |
a8feae09 JP |
429 | pr_err("Getting VBE info block failed (eax=0x%x, err=%d)\n", |
430 | (u32)task->t.regs.eax, err); | |
8bdb3a2d MJ |
431 | return -EINVAL; |
432 | } | |
433 | ||
434 | if (par->vbe_ib.vbe_version < 0x0200) { | |
a8feae09 | 435 | pr_err("Sorry, pre-VBE 2.0 cards are not supported\n"); |
8bdb3a2d MJ |
436 | return -EINVAL; |
437 | } | |
438 | ||
439 | if (!par->vbe_ib.mode_list_ptr) { | |
a8feae09 | 440 | pr_err("Missing mode list!\n"); |
8bdb3a2d MJ |
441 | return -EINVAL; |
442 | } | |
443 | ||
a8feae09 | 444 | pr_info(""); |
8bdb3a2d MJ |
445 | |
446 | /* | |
447 | * Convert string pointers and the mode list pointer into | |
448 | * usable addresses. Print informational messages about the | |
449 | * video adapter and its vendor. | |
450 | */ | |
451 | if (par->vbe_ib.oem_vendor_name_ptr) | |
a8feae09 | 452 | pr_cont("%s, ", |
8bdb3a2d MJ |
453 | ((char *)task->buf) + par->vbe_ib.oem_vendor_name_ptr); |
454 | ||
455 | if (par->vbe_ib.oem_product_name_ptr) | |
a8feae09 | 456 | pr_cont("%s, ", |
8bdb3a2d MJ |
457 | ((char *)task->buf) + par->vbe_ib.oem_product_name_ptr); |
458 | ||
459 | if (par->vbe_ib.oem_product_rev_ptr) | |
a8feae09 | 460 | pr_cont("%s, ", |
8bdb3a2d MJ |
461 | ((char *)task->buf) + par->vbe_ib.oem_product_rev_ptr); |
462 | ||
463 | if (par->vbe_ib.oem_string_ptr) | |
a8feae09 | 464 | pr_cont("OEM: %s, ", |
8bdb3a2d MJ |
465 | ((char *)task->buf) + par->vbe_ib.oem_string_ptr); |
466 | ||
a8feae09 JP |
467 | pr_cont("VBE v%d.%d\n", |
468 | (par->vbe_ib.vbe_version & 0xff00) >> 8, | |
469 | par->vbe_ib.vbe_version & 0xff); | |
8bdb3a2d MJ |
470 | |
471 | return 0; | |
472 | } | |
473 | ||
48c68c4f GKH |
474 | static int uvesafb_vbe_getmodes(struct uvesafb_ktask *task, |
475 | struct uvesafb_par *par) | |
8bdb3a2d MJ |
476 | { |
477 | int off = 0, err; | |
478 | u16 *mode; | |
479 | ||
480 | par->vbe_modes_cnt = 0; | |
481 | ||
482 | /* Count available modes. */ | |
483 | mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr); | |
484 | while (*mode != 0xffff) { | |
485 | par->vbe_modes_cnt++; | |
486 | mode++; | |
487 | } | |
488 | ||
489 | par->vbe_modes = kzalloc(sizeof(struct vbe_mode_ib) * | |
490 | par->vbe_modes_cnt, GFP_KERNEL); | |
491 | if (!par->vbe_modes) | |
492 | return -ENOMEM; | |
493 | ||
494 | /* Get info about all available modes. */ | |
495 | mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr); | |
496 | while (*mode != 0xffff) { | |
497 | struct vbe_mode_ib *mib; | |
498 | ||
499 | uvesafb_reset(task); | |
500 | task->t.regs.eax = 0x4f01; | |
501 | task->t.regs.ecx = (u32) *mode; | |
502 | task->t.flags = TF_BUF_RET | TF_BUF_ESDI; | |
503 | task->t.buf_len = sizeof(struct vbe_mode_ib); | |
504 | task->buf = par->vbe_modes + off; | |
505 | ||
506 | err = uvesafb_exec(task); | |
507 | if (err || (task->t.regs.eax & 0xffff) != 0x004f) { | |
a8feae09 | 508 | pr_warn("Getting mode info block for mode 0x%x failed (eax=0x%x, err=%d)\n", |
8bdb3a2d | 509 | *mode, (u32)task->t.regs.eax, err); |
9350cc90 MJ |
510 | mode++; |
511 | par->vbe_modes_cnt--; | |
512 | continue; | |
8bdb3a2d MJ |
513 | } |
514 | ||
515 | mib = task->buf; | |
516 | mib->mode_id = *mode; | |
517 | ||
518 | /* | |
519 | * We only want modes that are supported with the current | |
520 | * hardware configuration, color, graphics and that have | |
521 | * support for the LFB. | |
522 | */ | |
523 | if ((mib->mode_attr & VBE_MODE_MASK) == VBE_MODE_MASK && | |
524 | mib->bits_per_pixel >= 8) | |
525 | off++; | |
526 | else | |
527 | par->vbe_modes_cnt--; | |
528 | ||
529 | mode++; | |
530 | mib->depth = mib->red_len + mib->green_len + mib->blue_len; | |
531 | ||
532 | /* | |
533 | * Handle 8bpp modes and modes with broken color component | |
534 | * lengths. | |
535 | */ | |
536 | if (mib->depth == 0 || (mib->depth == 24 && | |
537 | mib->bits_per_pixel == 32)) | |
538 | mib->depth = mib->bits_per_pixel; | |
539 | } | |
540 | ||
9350cc90 MJ |
541 | if (par->vbe_modes_cnt > 0) |
542 | return 0; | |
543 | else | |
544 | return -EINVAL; | |
8bdb3a2d MJ |
545 | } |
546 | ||
547 | /* | |
548 | * The Protected Mode Interface is 32-bit x86 code, so we only run it on | |
549 | * x86 and not x86_64. | |
550 | */ | |
551 | #ifdef CONFIG_X86_32 | |
48c68c4f GKH |
552 | static int uvesafb_vbe_getpmi(struct uvesafb_ktask *task, |
553 | struct uvesafb_par *par) | |
8bdb3a2d MJ |
554 | { |
555 | int i, err; | |
556 | ||
557 | uvesafb_reset(task); | |
558 | task->t.regs.eax = 0x4f0a; | |
559 | task->t.regs.ebx = 0x0; | |
560 | err = uvesafb_exec(task); | |
561 | ||
562 | if ((task->t.regs.eax & 0xffff) != 0x4f || task->t.regs.es < 0xc000) { | |
563 | par->pmi_setpal = par->ypan = 0; | |
564 | } else { | |
565 | par->pmi_base = (u16 *)phys_to_virt(((u32)task->t.regs.es << 4) | |
566 | + task->t.regs.edi); | |
567 | par->pmi_start = (u8 *)par->pmi_base + par->pmi_base[1]; | |
568 | par->pmi_pal = (u8 *)par->pmi_base + par->pmi_base[2]; | |
a8feae09 JP |
569 | pr_info("protected mode interface info at %04x:%04x\n", |
570 | (u16)task->t.regs.es, (u16)task->t.regs.edi); | |
571 | pr_info("pmi: set display start = %p, set palette = %p\n", | |
572 | par->pmi_start, par->pmi_pal); | |
8bdb3a2d MJ |
573 | |
574 | if (par->pmi_base[3]) { | |
a8feae09 | 575 | pr_info("pmi: ports ="); |
8bdb3a2d MJ |
576 | for (i = par->pmi_base[3]/2; |
577 | par->pmi_base[i] != 0xffff; i++) | |
a8feae09 JP |
578 | pr_cont(" %x", par->pmi_base[i]); |
579 | pr_cont("\n"); | |
8bdb3a2d MJ |
580 | |
581 | if (par->pmi_base[i] != 0xffff) { | |
a8feae09 | 582 | pr_info("can't handle memory requests, pmi disabled\n"); |
8bdb3a2d MJ |
583 | par->ypan = par->pmi_setpal = 0; |
584 | } | |
585 | } | |
586 | } | |
587 | return 0; | |
588 | } | |
589 | #endif /* CONFIG_X86_32 */ | |
590 | ||
591 | /* | |
592 | * Check whether a video mode is supported by the Video BIOS and is | |
593 | * compatible with the monitor limits. | |
594 | */ | |
48c68c4f GKH |
595 | static int uvesafb_is_valid_mode(struct fb_videomode *mode, |
596 | struct fb_info *info) | |
8bdb3a2d MJ |
597 | { |
598 | if (info->monspecs.gtf) { | |
599 | fb_videomode_to_var(&info->var, mode); | |
600 | if (fb_validate_mode(&info->var, info)) | |
601 | return 0; | |
602 | } | |
603 | ||
604 | if (uvesafb_vbe_find_mode(info->par, mode->xres, mode->yres, 8, | |
605 | UVESAFB_EXACT_RES) == -1) | |
606 | return 0; | |
607 | ||
608 | return 1; | |
609 | } | |
610 | ||
48c68c4f | 611 | static int uvesafb_vbe_getedid(struct uvesafb_ktask *task, struct fb_info *info) |
8bdb3a2d MJ |
612 | { |
613 | struct uvesafb_par *par = info->par; | |
614 | int err = 0; | |
615 | ||
616 | if (noedid || par->vbe_ib.vbe_version < 0x0300) | |
617 | return -EINVAL; | |
618 | ||
619 | task->t.regs.eax = 0x4f15; | |
620 | task->t.regs.ebx = 0; | |
621 | task->t.regs.ecx = 0; | |
622 | task->t.buf_len = 0; | |
623 | task->t.flags = 0; | |
624 | ||
625 | err = uvesafb_exec(task); | |
626 | ||
627 | if ((task->t.regs.eax & 0xffff) != 0x004f || err) | |
628 | return -EINVAL; | |
629 | ||
630 | if ((task->t.regs.ebx & 0x3) == 3) { | |
a8feae09 | 631 | pr_info("VBIOS/hardware supports both DDC1 and DDC2 transfers\n"); |
8bdb3a2d | 632 | } else if ((task->t.regs.ebx & 0x3) == 2) { |
a8feae09 | 633 | pr_info("VBIOS/hardware supports DDC2 transfers\n"); |
8bdb3a2d | 634 | } else if ((task->t.regs.ebx & 0x3) == 1) { |
a8feae09 | 635 | pr_info("VBIOS/hardware supports DDC1 transfers\n"); |
8bdb3a2d | 636 | } else { |
a8feae09 | 637 | pr_info("VBIOS/hardware doesn't support DDC transfers\n"); |
8bdb3a2d MJ |
638 | return -EINVAL; |
639 | } | |
640 | ||
641 | task->t.regs.eax = 0x4f15; | |
642 | task->t.regs.ebx = 1; | |
643 | task->t.regs.ecx = task->t.regs.edx = 0; | |
644 | task->t.flags = TF_BUF_RET | TF_BUF_ESDI; | |
645 | task->t.buf_len = EDID_LENGTH; | |
646 | task->buf = kzalloc(EDID_LENGTH, GFP_KERNEL); | |
7ed25867 WY |
647 | if (!task->buf) |
648 | return -ENOMEM; | |
8bdb3a2d MJ |
649 | |
650 | err = uvesafb_exec(task); | |
651 | ||
652 | if ((task->t.regs.eax & 0xffff) == 0x004f && !err) { | |
653 | fb_edid_to_monspecs(task->buf, &info->monspecs); | |
654 | ||
655 | if (info->monspecs.vfmax && info->monspecs.hfmax) { | |
656 | /* | |
657 | * If the maximum pixel clock wasn't specified in | |
658 | * the EDID block, set it to 300 MHz. | |
659 | */ | |
660 | if (info->monspecs.dclkmax == 0) | |
661 | info->monspecs.dclkmax = 300 * 1000000; | |
662 | info->monspecs.gtf = 1; | |
663 | } | |
664 | } else { | |
665 | err = -EINVAL; | |
666 | } | |
667 | ||
668 | kfree(task->buf); | |
669 | return err; | |
670 | } | |
671 | ||
48c68c4f GKH |
672 | static void uvesafb_vbe_getmonspecs(struct uvesafb_ktask *task, |
673 | struct fb_info *info) | |
8bdb3a2d MJ |
674 | { |
675 | struct uvesafb_par *par = info->par; | |
676 | int i; | |
677 | ||
678 | memset(&info->monspecs, 0, sizeof(info->monspecs)); | |
679 | ||
680 | /* | |
681 | * If we don't get all necessary data from the EDID block, | |
682 | * mark it as incompatible with the GTF and set nocrtc so | |
683 | * that we always use the default BIOS refresh rate. | |
684 | */ | |
685 | if (uvesafb_vbe_getedid(task, info)) { | |
686 | info->monspecs.gtf = 0; | |
687 | par->nocrtc = 1; | |
688 | } | |
689 | ||
690 | /* Kernel command line overrides. */ | |
691 | if (maxclk) | |
692 | info->monspecs.dclkmax = maxclk * 1000000; | |
693 | if (maxvf) | |
694 | info->monspecs.vfmax = maxvf; | |
695 | if (maxhf) | |
696 | info->monspecs.hfmax = maxhf * 1000; | |
697 | ||
698 | /* | |
699 | * In case DDC transfers are not supported, the user can provide | |
700 | * monitor limits manually. Lower limits are set to "safe" values. | |
701 | */ | |
702 | if (info->monspecs.gtf == 0 && maxclk && maxvf && maxhf) { | |
703 | info->monspecs.dclkmin = 0; | |
704 | info->monspecs.vfmin = 60; | |
705 | info->monspecs.hfmin = 29000; | |
706 | info->monspecs.gtf = 1; | |
707 | par->nocrtc = 0; | |
708 | } | |
709 | ||
710 | if (info->monspecs.gtf) | |
a8feae09 JP |
711 | pr_info("monitor limits: vf = %d Hz, hf = %d kHz, clk = %d MHz\n", |
712 | info->monspecs.vfmax, | |
8bdb3a2d MJ |
713 | (int)(info->monspecs.hfmax / 1000), |
714 | (int)(info->monspecs.dclkmax / 1000000)); | |
715 | else | |
a8feae09 | 716 | pr_info("no monitor limits have been set, default refresh rate will be used\n"); |
8bdb3a2d MJ |
717 | |
718 | /* Add VBE modes to the modelist. */ | |
719 | for (i = 0; i < par->vbe_modes_cnt; i++) { | |
720 | struct fb_var_screeninfo var; | |
721 | struct vbe_mode_ib *mode; | |
722 | struct fb_videomode vmode; | |
723 | ||
724 | mode = &par->vbe_modes[i]; | |
725 | memset(&var, 0, sizeof(var)); | |
726 | ||
727 | var.xres = mode->x_res; | |
728 | var.yres = mode->y_res; | |
729 | ||
730 | fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, &var, info); | |
731 | fb_var_to_videomode(&vmode, &var); | |
732 | fb_add_videomode(&vmode, &info->modelist); | |
733 | } | |
734 | ||
735 | /* Add valid VESA modes to our modelist. */ | |
736 | for (i = 0; i < VESA_MODEDB_SIZE; i++) { | |
737 | if (uvesafb_is_valid_mode((struct fb_videomode *) | |
738 | &vesa_modes[i], info)) | |
739 | fb_add_videomode(&vesa_modes[i], &info->modelist); | |
740 | } | |
741 | ||
742 | for (i = 0; i < info->monspecs.modedb_len; i++) { | |
743 | if (uvesafb_is_valid_mode(&info->monspecs.modedb[i], info)) | |
744 | fb_add_videomode(&info->monspecs.modedb[i], | |
745 | &info->modelist); | |
746 | } | |
747 | ||
748 | return; | |
749 | } | |
750 | ||
48c68c4f GKH |
751 | static void uvesafb_vbe_getstatesize(struct uvesafb_ktask *task, |
752 | struct uvesafb_par *par) | |
8bdb3a2d MJ |
753 | { |
754 | int err; | |
755 | ||
756 | uvesafb_reset(task); | |
757 | ||
758 | /* | |
759 | * Get the VBE state buffer size. We want all available | |
760 | * hardware state data (CL = 0x0f). | |
761 | */ | |
762 | task->t.regs.eax = 0x4f04; | |
763 | task->t.regs.ecx = 0x000f; | |
764 | task->t.regs.edx = 0x0000; | |
765 | task->t.flags = 0; | |
766 | ||
767 | err = uvesafb_exec(task); | |
768 | ||
769 | if (err || (task->t.regs.eax & 0xffff) != 0x004f) { | |
a8feae09 | 770 | pr_warn("VBE state buffer size cannot be determined (eax=0x%x, err=%d)\n", |
8bdb3a2d MJ |
771 | task->t.regs.eax, err); |
772 | par->vbe_state_size = 0; | |
773 | return; | |
774 | } | |
775 | ||
776 | par->vbe_state_size = 64 * (task->t.regs.ebx & 0xffff); | |
777 | } | |
778 | ||
48c68c4f | 779 | static int uvesafb_vbe_init(struct fb_info *info) |
8bdb3a2d MJ |
780 | { |
781 | struct uvesafb_ktask *task = NULL; | |
782 | struct uvesafb_par *par = info->par; | |
783 | int err; | |
784 | ||
785 | task = uvesafb_prep(); | |
786 | if (!task) | |
787 | return -ENOMEM; | |
788 | ||
789 | err = uvesafb_vbe_getinfo(task, par); | |
790 | if (err) | |
791 | goto out; | |
792 | ||
793 | err = uvesafb_vbe_getmodes(task, par); | |
794 | if (err) | |
795 | goto out; | |
796 | ||
797 | par->nocrtc = nocrtc; | |
798 | #ifdef CONFIG_X86_32 | |
799 | par->pmi_setpal = pmi_setpal; | |
800 | par->ypan = ypan; | |
801 | ||
b78f29ca WY |
802 | if (par->pmi_setpal || par->ypan) { |
803 | if (__supported_pte_mask & _PAGE_NX) { | |
804 | par->pmi_setpal = par->ypan = 0; | |
a8feae09 | 805 | pr_warn("NX protection is active, better not use the PMI\n"); |
b78f29ca WY |
806 | } else { |
807 | uvesafb_vbe_getpmi(task, par); | |
808 | } | |
809 | } | |
8bdb3a2d MJ |
810 | #else |
811 | /* The protected mode interface is not available on non-x86. */ | |
812 | par->pmi_setpal = par->ypan = 0; | |
813 | #endif | |
814 | ||
815 | INIT_LIST_HEAD(&info->modelist); | |
816 | uvesafb_vbe_getmonspecs(task, info); | |
817 | uvesafb_vbe_getstatesize(task, par); | |
818 | ||
819 | out: uvesafb_free(task); | |
820 | return err; | |
821 | } | |
822 | ||
48c68c4f | 823 | static int uvesafb_vbe_init_mode(struct fb_info *info) |
8bdb3a2d MJ |
824 | { |
825 | struct list_head *pos; | |
826 | struct fb_modelist *modelist; | |
827 | struct fb_videomode *mode; | |
828 | struct uvesafb_par *par = info->par; | |
829 | int i, modeid; | |
830 | ||
831 | /* Has the user requested a specific VESA mode? */ | |
832 | if (vbemode) { | |
833 | for (i = 0; i < par->vbe_modes_cnt; i++) { | |
834 | if (par->vbe_modes[i].mode_id == vbemode) { | |
23b73654 MJ |
835 | modeid = i; |
836 | uvesafb_setup_var(&info->var, info, | |
837 | &par->vbe_modes[modeid]); | |
8bdb3a2d | 838 | fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, |
23b73654 | 839 | &info->var, info); |
8bdb3a2d MJ |
840 | /* |
841 | * With pixclock set to 0, the default BIOS | |
842 | * timings will be used in set_par(). | |
843 | */ | |
844 | info->var.pixclock = 0; | |
8bdb3a2d MJ |
845 | goto gotmode; |
846 | } | |
847 | } | |
a8feae09 | 848 | pr_info("requested VBE mode 0x%x is unavailable\n", vbemode); |
8bdb3a2d MJ |
849 | vbemode = 0; |
850 | } | |
851 | ||
852 | /* Count the modes in the modelist */ | |
853 | i = 0; | |
854 | list_for_each(pos, &info->modelist) | |
855 | i++; | |
856 | ||
857 | /* | |
858 | * Convert the modelist into a modedb so that we can use it with | |
859 | * fb_find_mode(). | |
860 | */ | |
861 | mode = kzalloc(i * sizeof(*mode), GFP_KERNEL); | |
862 | if (mode) { | |
863 | i = 0; | |
864 | list_for_each(pos, &info->modelist) { | |
865 | modelist = list_entry(pos, struct fb_modelist, list); | |
866 | mode[i] = modelist->mode; | |
867 | i++; | |
868 | } | |
869 | ||
870 | if (!mode_option) | |
871 | mode_option = UVESAFB_DEFAULT_MODE; | |
872 | ||
873 | i = fb_find_mode(&info->var, info, mode_option, mode, i, | |
874 | NULL, 8); | |
875 | ||
876 | kfree(mode); | |
877 | } | |
878 | ||
879 | /* fb_find_mode() failed */ | |
5e72b32d | 880 | if (i == 0) { |
8bdb3a2d MJ |
881 | info->var.xres = 640; |
882 | info->var.yres = 480; | |
883 | mode = (struct fb_videomode *) | |
884 | fb_find_best_mode(&info->var, &info->modelist); | |
885 | ||
886 | if (mode) { | |
887 | fb_videomode_to_var(&info->var, mode); | |
888 | } else { | |
889 | modeid = par->vbe_modes[0].mode_id; | |
23b73654 MJ |
890 | uvesafb_setup_var(&info->var, info, |
891 | &par->vbe_modes[modeid]); | |
8bdb3a2d | 892 | fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, |
23b73654 MJ |
893 | &info->var, info); |
894 | ||
8bdb3a2d MJ |
895 | goto gotmode; |
896 | } | |
897 | } | |
898 | ||
899 | /* Look for a matching VBE mode. */ | |
900 | modeid = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, | |
901 | info->var.bits_per_pixel, UVESAFB_EXACT_RES); | |
902 | ||
903 | if (modeid == -1) | |
904 | return -EINVAL; | |
905 | ||
8bdb3a2d MJ |
906 | uvesafb_setup_var(&info->var, info, &par->vbe_modes[modeid]); |
907 | ||
23b73654 | 908 | gotmode: |
8bdb3a2d MJ |
909 | /* |
910 | * If we are not VBE3.0+ compliant, we're done -- the BIOS will | |
911 | * ignore our timings anyway. | |
912 | */ | |
913 | if (par->vbe_ib.vbe_version < 0x0300 || par->nocrtc) | |
914 | fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, | |
915 | &info->var, info); | |
916 | ||
917 | return modeid; | |
918 | } | |
919 | ||
920 | static int uvesafb_setpalette(struct uvesafb_pal_entry *entries, int count, | |
921 | int start, struct fb_info *info) | |
922 | { | |
923 | struct uvesafb_ktask *task; | |
03ad369a | 924 | #ifdef CONFIG_X86 |
8bdb3a2d MJ |
925 | struct uvesafb_par *par = info->par; |
926 | int i = par->mode_idx; | |
03ad369a | 927 | #endif |
8bdb3a2d MJ |
928 | int err = 0; |
929 | ||
930 | /* | |
931 | * We support palette modifications for 8 bpp modes only, so | |
932 | * there can never be more than 256 entries. | |
933 | */ | |
934 | if (start + count > 256) | |
935 | return -EINVAL; | |
936 | ||
937 | #ifdef CONFIG_X86 | |
938 | /* Use VGA registers if mode is VGA-compatible. */ | |
939 | if (i >= 0 && i < par->vbe_modes_cnt && | |
940 | par->vbe_modes[i].mode_attr & VBE_MODE_VGACOMPAT) { | |
941 | for (i = 0; i < count; i++) { | |
942 | outb_p(start + i, dac_reg); | |
943 | outb_p(entries[i].red, dac_val); | |
944 | outb_p(entries[i].green, dac_val); | |
945 | outb_p(entries[i].blue, dac_val); | |
946 | } | |
947 | } | |
948 | #ifdef CONFIG_X86_32 | |
949 | else if (par->pmi_setpal) { | |
950 | __asm__ __volatile__( | |
951 | "call *(%%esi)" | |
952 | : /* no return value */ | |
953 | : "a" (0x4f09), /* EAX */ | |
954 | "b" (0), /* EBX */ | |
955 | "c" (count), /* ECX */ | |
956 | "d" (start), /* EDX */ | |
957 | "D" (entries), /* EDI */ | |
958 | "S" (&par->pmi_pal)); /* ESI */ | |
959 | } | |
960 | #endif /* CONFIG_X86_32 */ | |
961 | else | |
962 | #endif /* CONFIG_X86 */ | |
963 | { | |
964 | task = uvesafb_prep(); | |
965 | if (!task) | |
966 | return -ENOMEM; | |
967 | ||
968 | task->t.regs.eax = 0x4f09; | |
969 | task->t.regs.ebx = 0x0; | |
970 | task->t.regs.ecx = count; | |
971 | task->t.regs.edx = start; | |
972 | task->t.flags = TF_BUF_ESDI; | |
973 | task->t.buf_len = sizeof(struct uvesafb_pal_entry) * count; | |
974 | task->buf = entries; | |
975 | ||
976 | err = uvesafb_exec(task); | |
977 | if ((task->t.regs.eax & 0xffff) != 0x004f) | |
978 | err = 1; | |
979 | ||
980 | uvesafb_free(task); | |
981 | } | |
982 | return err; | |
983 | } | |
984 | ||
985 | static int uvesafb_setcolreg(unsigned regno, unsigned red, unsigned green, | |
986 | unsigned blue, unsigned transp, | |
987 | struct fb_info *info) | |
988 | { | |
989 | struct uvesafb_pal_entry entry; | |
0ca1071f | 990 | int shift = 16 - dac_width; |
8bdb3a2d MJ |
991 | int err = 0; |
992 | ||
993 | if (regno >= info->cmap.len) | |
994 | return -EINVAL; | |
995 | ||
996 | if (info->var.bits_per_pixel == 8) { | |
997 | entry.red = red >> shift; | |
998 | entry.green = green >> shift; | |
999 | entry.blue = blue >> shift; | |
1000 | entry.pad = 0; | |
1001 | ||
1002 | err = uvesafb_setpalette(&entry, 1, regno, info); | |
1003 | } else if (regno < 16) { | |
1004 | switch (info->var.bits_per_pixel) { | |
1005 | case 16: | |
1006 | if (info->var.red.offset == 10) { | |
1007 | /* 1:5:5:5 */ | |
1008 | ((u32 *) (info->pseudo_palette))[regno] = | |
1009 | ((red & 0xf800) >> 1) | | |
1010 | ((green & 0xf800) >> 6) | | |
1011 | ((blue & 0xf800) >> 11); | |
1012 | } else { | |
1013 | /* 0:5:6:5 */ | |
1014 | ((u32 *) (info->pseudo_palette))[regno] = | |
1015 | ((red & 0xf800) ) | | |
1016 | ((green & 0xfc00) >> 5) | | |
1017 | ((blue & 0xf800) >> 11); | |
1018 | } | |
1019 | break; | |
1020 | ||
1021 | case 24: | |
1022 | case 32: | |
1023 | red >>= 8; | |
1024 | green >>= 8; | |
1025 | blue >>= 8; | |
1026 | ((u32 *)(info->pseudo_palette))[regno] = | |
1027 | (red << info->var.red.offset) | | |
1028 | (green << info->var.green.offset) | | |
1029 | (blue << info->var.blue.offset); | |
1030 | break; | |
1031 | } | |
1032 | } | |
1033 | return err; | |
1034 | } | |
1035 | ||
1036 | static int uvesafb_setcmap(struct fb_cmap *cmap, struct fb_info *info) | |
1037 | { | |
1038 | struct uvesafb_pal_entry *entries; | |
0ca1071f | 1039 | int shift = 16 - dac_width; |
8bdb3a2d MJ |
1040 | int i, err = 0; |
1041 | ||
1042 | if (info->var.bits_per_pixel == 8) { | |
1043 | if (cmap->start + cmap->len > info->cmap.start + | |
1044 | info->cmap.len || cmap->start < info->cmap.start) | |
1045 | return -EINVAL; | |
1046 | ||
1047 | entries = kmalloc(sizeof(*entries) * cmap->len, GFP_KERNEL); | |
1048 | if (!entries) | |
1049 | return -ENOMEM; | |
1050 | ||
1051 | for (i = 0; i < cmap->len; i++) { | |
1052 | entries[i].red = cmap->red[i] >> shift; | |
1053 | entries[i].green = cmap->green[i] >> shift; | |
1054 | entries[i].blue = cmap->blue[i] >> shift; | |
1055 | entries[i].pad = 0; | |
1056 | } | |
1057 | err = uvesafb_setpalette(entries, cmap->len, cmap->start, info); | |
1058 | kfree(entries); | |
1059 | } else { | |
1060 | /* | |
1061 | * For modes with bpp > 8, we only set the pseudo palette in | |
1062 | * the fb_info struct. We rely on uvesafb_setcolreg to do all | |
1063 | * sanity checking. | |
1064 | */ | |
1065 | for (i = 0; i < cmap->len; i++) { | |
1066 | err |= uvesafb_setcolreg(cmap->start + i, cmap->red[i], | |
1067 | cmap->green[i], cmap->blue[i], | |
1068 | 0, info); | |
1069 | } | |
1070 | } | |
1071 | return err; | |
1072 | } | |
1073 | ||
1074 | static int uvesafb_pan_display(struct fb_var_screeninfo *var, | |
1075 | struct fb_info *info) | |
1076 | { | |
1077 | #ifdef CONFIG_X86_32 | |
1078 | int offset; | |
1079 | struct uvesafb_par *par = info->par; | |
1080 | ||
1081 | offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4; | |
1082 | ||
1083 | /* | |
1084 | * It turns out it's not the best idea to do panning via vm86, | |
1085 | * so we only allow it if we have a PMI. | |
1086 | */ | |
1087 | if (par->pmi_start) { | |
1088 | __asm__ __volatile__( | |
1089 | "call *(%%edi)" | |
1090 | : /* no return value */ | |
1091 | : "a" (0x4f07), /* EAX */ | |
1092 | "b" (0), /* EBX */ | |
1093 | "c" (offset), /* ECX */ | |
1094 | "d" (offset >> 16), /* EDX */ | |
1095 | "D" (&par->pmi_start)); /* EDI */ | |
1096 | } | |
1097 | #endif | |
1098 | return 0; | |
1099 | } | |
1100 | ||
1101 | static int uvesafb_blank(int blank, struct fb_info *info) | |
1102 | { | |
8bdb3a2d MJ |
1103 | struct uvesafb_ktask *task; |
1104 | int err = 1; | |
8bdb3a2d | 1105 | #ifdef CONFIG_X86 |
03ad369a FL |
1106 | struct uvesafb_par *par = info->par; |
1107 | ||
8bdb3a2d MJ |
1108 | if (par->vbe_ib.capabilities & VBE_CAP_VGACOMPAT) { |
1109 | int loop = 10000; | |
1110 | u8 seq = 0, crtc17 = 0; | |
1111 | ||
1112 | if (blank == FB_BLANK_POWERDOWN) { | |
1113 | seq = 0x20; | |
1114 | crtc17 = 0x00; | |
1115 | err = 0; | |
1116 | } else { | |
1117 | seq = 0x00; | |
1118 | crtc17 = 0x80; | |
1119 | err = (blank == FB_BLANK_UNBLANK) ? 0 : -EINVAL; | |
1120 | } | |
1121 | ||
1122 | vga_wseq(NULL, 0x00, 0x01); | |
1123 | seq |= vga_rseq(NULL, 0x01) & ~0x20; | |
1124 | vga_wseq(NULL, 0x00, seq); | |
1125 | ||
1126 | crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80; | |
1127 | while (loop--); | |
1128 | vga_wcrt(NULL, 0x17, crtc17); | |
1129 | vga_wseq(NULL, 0x00, 0x03); | |
1130 | } else | |
1131 | #endif /* CONFIG_X86 */ | |
1132 | { | |
1133 | task = uvesafb_prep(); | |
1134 | if (!task) | |
1135 | return -ENOMEM; | |
1136 | ||
1137 | task->t.regs.eax = 0x4f10; | |
1138 | switch (blank) { | |
1139 | case FB_BLANK_UNBLANK: | |
1140 | task->t.regs.ebx = 0x0001; | |
1141 | break; | |
1142 | case FB_BLANK_NORMAL: | |
1143 | task->t.regs.ebx = 0x0101; /* standby */ | |
1144 | break; | |
1145 | case FB_BLANK_POWERDOWN: | |
1146 | task->t.regs.ebx = 0x0401; /* powerdown */ | |
1147 | break; | |
1148 | default: | |
1149 | goto out; | |
1150 | } | |
1151 | ||
1152 | err = uvesafb_exec(task); | |
1153 | if (err || (task->t.regs.eax & 0xffff) != 0x004f) | |
1154 | err = 1; | |
1155 | out: uvesafb_free(task); | |
1156 | } | |
1157 | return err; | |
1158 | } | |
1159 | ||
1160 | static int uvesafb_open(struct fb_info *info, int user) | |
1161 | { | |
1162 | struct uvesafb_par *par = info->par; | |
1163 | int cnt = atomic_read(&par->ref_count); | |
c2bc0a75 | 1164 | u8 *buf = NULL; |
8bdb3a2d | 1165 | |
c2bc0a75 WY |
1166 | if (!cnt && par->vbe_state_size) { |
1167 | buf = uvesafb_vbe_state_save(par); | |
1168 | if (IS_ERR(buf)) { | |
a8feae09 JP |
1169 | pr_warn("save hardware state failed, error code is %ld!\n", |
1170 | PTR_ERR(buf)); | |
c2bc0a75 WY |
1171 | } else { |
1172 | par->vbe_state_orig = buf; | |
1173 | } | |
1174 | } | |
8bdb3a2d MJ |
1175 | |
1176 | atomic_inc(&par->ref_count); | |
1177 | return 0; | |
1178 | } | |
1179 | ||
1180 | static int uvesafb_release(struct fb_info *info, int user) | |
1181 | { | |
1182 | struct uvesafb_ktask *task = NULL; | |
1183 | struct uvesafb_par *par = info->par; | |
1184 | int cnt = atomic_read(&par->ref_count); | |
1185 | ||
1186 | if (!cnt) | |
1187 | return -EINVAL; | |
1188 | ||
1189 | if (cnt != 1) | |
1190 | goto out; | |
1191 | ||
1192 | task = uvesafb_prep(); | |
1193 | if (!task) | |
1194 | goto out; | |
1195 | ||
1196 | /* First, try to set the standard 80x25 text mode. */ | |
1197 | task->t.regs.eax = 0x0003; | |
1198 | uvesafb_exec(task); | |
1199 | ||
1200 | /* | |
1201 | * Now try to restore whatever hardware state we might have | |
1202 | * saved when the fb device was first opened. | |
1203 | */ | |
1204 | uvesafb_vbe_state_restore(par, par->vbe_state_orig); | |
1205 | out: | |
1206 | atomic_dec(&par->ref_count); | |
e87d9f29 | 1207 | uvesafb_free(task); |
8bdb3a2d MJ |
1208 | return 0; |
1209 | } | |
1210 | ||
1211 | static int uvesafb_set_par(struct fb_info *info) | |
1212 | { | |
1213 | struct uvesafb_par *par = info->par; | |
1214 | struct uvesafb_ktask *task = NULL; | |
1215 | struct vbe_crtc_ib *crtc = NULL; | |
1216 | struct vbe_mode_ib *mode = NULL; | |
1217 | int i, err = 0, depth = info->var.bits_per_pixel; | |
1218 | ||
1219 | if (depth > 8 && depth != 32) | |
1220 | depth = info->var.red.length + info->var.green.length + | |
1221 | info->var.blue.length; | |
1222 | ||
1223 | i = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, depth, | |
1224 | UVESAFB_EXACT_RES | UVESAFB_EXACT_DEPTH); | |
1225 | if (i >= 0) | |
1226 | mode = &par->vbe_modes[i]; | |
1227 | else | |
1228 | return -EINVAL; | |
1229 | ||
1230 | task = uvesafb_prep(); | |
1231 | if (!task) | |
1232 | return -ENOMEM; | |
1233 | setmode: | |
1234 | task->t.regs.eax = 0x4f02; | |
1235 | task->t.regs.ebx = mode->mode_id | 0x4000; /* use LFB */ | |
1236 | ||
1237 | if (par->vbe_ib.vbe_version >= 0x0300 && !par->nocrtc && | |
1238 | info->var.pixclock != 0) { | |
1239 | task->t.regs.ebx |= 0x0800; /* use CRTC data */ | |
1240 | task->t.flags = TF_BUF_ESDI; | |
1241 | crtc = kzalloc(sizeof(struct vbe_crtc_ib), GFP_KERNEL); | |
1242 | if (!crtc) { | |
1243 | err = -ENOMEM; | |
1244 | goto out; | |
1245 | } | |
1246 | crtc->horiz_start = info->var.xres + info->var.right_margin; | |
1247 | crtc->horiz_end = crtc->horiz_start + info->var.hsync_len; | |
1248 | crtc->horiz_total = crtc->horiz_end + info->var.left_margin; | |
1249 | ||
1250 | crtc->vert_start = info->var.yres + info->var.lower_margin; | |
1251 | crtc->vert_end = crtc->vert_start + info->var.vsync_len; | |
1252 | crtc->vert_total = crtc->vert_end + info->var.upper_margin; | |
1253 | ||
1254 | crtc->pixel_clock = PICOS2KHZ(info->var.pixclock) * 1000; | |
1255 | crtc->refresh_rate = (u16)(100 * (crtc->pixel_clock / | |
1256 | (crtc->vert_total * crtc->horiz_total))); | |
1257 | ||
1258 | if (info->var.vmode & FB_VMODE_DOUBLE) | |
1259 | crtc->flags |= 0x1; | |
1260 | if (info->var.vmode & FB_VMODE_INTERLACED) | |
1261 | crtc->flags |= 0x2; | |
1262 | if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT)) | |
1263 | crtc->flags |= 0x4; | |
1264 | if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT)) | |
1265 | crtc->flags |= 0x8; | |
1266 | memcpy(&par->crtc, crtc, sizeof(*crtc)); | |
1267 | } else { | |
1268 | memset(&par->crtc, 0, sizeof(*crtc)); | |
1269 | } | |
1270 | ||
1271 | task->t.buf_len = sizeof(struct vbe_crtc_ib); | |
1272 | task->buf = &par->crtc; | |
1273 | ||
1274 | err = uvesafb_exec(task); | |
1275 | if (err || (task->t.regs.eax & 0xffff) != 0x004f) { | |
1276 | /* | |
1277 | * The mode switch might have failed because we tried to | |
1278 | * use our own timings. Try again with the default timings. | |
1279 | */ | |
1280 | if (crtc != NULL) { | |
a8feae09 JP |
1281 | pr_warn("mode switch failed (eax=0x%x, err=%d) - trying again with default timings\n", |
1282 | task->t.regs.eax, err); | |
8bdb3a2d MJ |
1283 | uvesafb_reset(task); |
1284 | kfree(crtc); | |
1285 | crtc = NULL; | |
1286 | info->var.pixclock = 0; | |
1287 | goto setmode; | |
1288 | } else { | |
a8feae09 JP |
1289 | pr_err("mode switch failed (eax=0x%x, err=%d)\n", |
1290 | task->t.regs.eax, err); | |
8bdb3a2d MJ |
1291 | err = -EINVAL; |
1292 | goto out; | |
1293 | } | |
1294 | } | |
1295 | par->mode_idx = i; | |
1296 | ||
1297 | /* For 8bpp modes, always try to set the DAC to 8 bits. */ | |
1298 | if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC && | |
1299 | mode->bits_per_pixel <= 8) { | |
1300 | uvesafb_reset(task); | |
1301 | task->t.regs.eax = 0x4f08; | |
1302 | task->t.regs.ebx = 0x0800; | |
1303 | ||
1304 | err = uvesafb_exec(task); | |
1305 | if (err || (task->t.regs.eax & 0xffff) != 0x004f || | |
1306 | ((task->t.regs.ebx & 0xff00) >> 8) != 8) { | |
0ca1071f MJ |
1307 | dac_width = 6; |
1308 | } else { | |
1309 | dac_width = 8; | |
8bdb3a2d MJ |
1310 | } |
1311 | } | |
1312 | ||
1313 | info->fix.visual = (info->var.bits_per_pixel == 8) ? | |
1314 | FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR; | |
1315 | info->fix.line_length = mode->bytes_per_scan_line; | |
1316 | ||
b1dfee60 SK |
1317 | out: |
1318 | kfree(crtc); | |
8bdb3a2d MJ |
1319 | uvesafb_free(task); |
1320 | ||
1321 | return err; | |
1322 | } | |
1323 | ||
1324 | static void uvesafb_check_limits(struct fb_var_screeninfo *var, | |
1325 | struct fb_info *info) | |
1326 | { | |
1327 | const struct fb_videomode *mode; | |
1328 | struct uvesafb_par *par = info->par; | |
1329 | ||
1330 | /* | |
1331 | * If pixclock is set to 0, then we're using default BIOS timings | |
1332 | * and thus don't have to perform any checks here. | |
1333 | */ | |
1334 | if (!var->pixclock) | |
1335 | return; | |
1336 | ||
1337 | if (par->vbe_ib.vbe_version < 0x0300) { | |
1338 | fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, var, info); | |
1339 | return; | |
1340 | } | |
1341 | ||
1342 | if (!fb_validate_mode(var, info)) | |
1343 | return; | |
1344 | ||
1345 | mode = fb_find_best_mode(var, &info->modelist); | |
1346 | if (mode) { | |
1347 | if (mode->xres == var->xres && mode->yres == var->yres && | |
1348 | !(mode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))) { | |
1349 | fb_videomode_to_var(var, mode); | |
1350 | return; | |
1351 | } | |
1352 | } | |
1353 | ||
1354 | if (info->monspecs.gtf && !fb_get_mode(FB_MAXTIMINGS, 0, var, info)) | |
1355 | return; | |
1356 | /* Use default refresh rate */ | |
1357 | var->pixclock = 0; | |
1358 | } | |
1359 | ||
1360 | static int uvesafb_check_var(struct fb_var_screeninfo *var, | |
1361 | struct fb_info *info) | |
1362 | { | |
1363 | struct uvesafb_par *par = info->par; | |
1364 | struct vbe_mode_ib *mode = NULL; | |
1365 | int match = -1; | |
1366 | int depth = var->red.length + var->green.length + var->blue.length; | |
1367 | ||
1368 | /* | |
1369 | * Various apps will use bits_per_pixel to set the color depth, | |
1370 | * which is theoretically incorrect, but which we'll try to handle | |
1371 | * here. | |
1372 | */ | |
1373 | if (depth == 0 || abs(depth - var->bits_per_pixel) >= 8) | |
1374 | depth = var->bits_per_pixel; | |
1375 | ||
1376 | match = uvesafb_vbe_find_mode(par, var->xres, var->yres, depth, | |
1377 | UVESAFB_EXACT_RES); | |
1378 | if (match == -1) | |
1379 | return -EINVAL; | |
1380 | ||
1381 | mode = &par->vbe_modes[match]; | |
1382 | uvesafb_setup_var(var, info, mode); | |
1383 | ||
1384 | /* | |
1385 | * Check whether we have remapped enough memory for this mode. | |
1386 | * We might be called at an early stage, when we haven't remapped | |
1387 | * any memory yet, in which case we simply skip the check. | |
1388 | */ | |
1389 | if (var->yres * mode->bytes_per_scan_line > info->fix.smem_len | |
1390 | && info->fix.smem_len) | |
1391 | return -EINVAL; | |
1392 | ||
1393 | if ((var->vmode & FB_VMODE_DOUBLE) && | |
1394 | !(par->vbe_modes[match].mode_attr & 0x100)) | |
1395 | var->vmode &= ~FB_VMODE_DOUBLE; | |
1396 | ||
1397 | if ((var->vmode & FB_VMODE_INTERLACED) && | |
1398 | !(par->vbe_modes[match].mode_attr & 0x200)) | |
1399 | var->vmode &= ~FB_VMODE_INTERLACED; | |
1400 | ||
1401 | uvesafb_check_limits(var, info); | |
1402 | ||
1403 | var->xres_virtual = var->xres; | |
1404 | var->yres_virtual = (par->ypan) ? | |
1405 | info->fix.smem_len / mode->bytes_per_scan_line : | |
1406 | var->yres; | |
1407 | return 0; | |
1408 | } | |
1409 | ||
8bdb3a2d MJ |
1410 | static struct fb_ops uvesafb_ops = { |
1411 | .owner = THIS_MODULE, | |
1412 | .fb_open = uvesafb_open, | |
1413 | .fb_release = uvesafb_release, | |
1414 | .fb_setcolreg = uvesafb_setcolreg, | |
1415 | .fb_setcmap = uvesafb_setcmap, | |
1416 | .fb_pan_display = uvesafb_pan_display, | |
1417 | .fb_blank = uvesafb_blank, | |
1418 | .fb_fillrect = cfb_fillrect, | |
1419 | .fb_copyarea = cfb_copyarea, | |
1420 | .fb_imageblit = cfb_imageblit, | |
1421 | .fb_check_var = uvesafb_check_var, | |
1422 | .fb_set_par = uvesafb_set_par, | |
8bdb3a2d MJ |
1423 | }; |
1424 | ||
48c68c4f | 1425 | static void uvesafb_init_info(struct fb_info *info, struct vbe_mode_ib *mode) |
8bdb3a2d MJ |
1426 | { |
1427 | unsigned int size_vmode; | |
1428 | unsigned int size_remap; | |
1429 | unsigned int size_total; | |
1430 | struct uvesafb_par *par = info->par; | |
1431 | int i, h; | |
1432 | ||
1433 | info->pseudo_palette = ((u8 *)info->par + sizeof(struct uvesafb_par)); | |
1434 | info->fix = uvesafb_fix; | |
1435 | info->fix.ypanstep = par->ypan ? 1 : 0; | |
1436 | info->fix.ywrapstep = (par->ypan > 1) ? 1 : 0; | |
1437 | ||
8bdb3a2d MJ |
1438 | /* Disable blanking if the user requested so. */ |
1439 | if (!blank) | |
1440 | info->fbops->fb_blank = NULL; | |
1441 | ||
1442 | /* | |
1443 | * Find out how much IO memory is required for the mode with | |
1444 | * the highest resolution. | |
1445 | */ | |
1446 | size_remap = 0; | |
1447 | for (i = 0; i < par->vbe_modes_cnt; i++) { | |
1448 | h = par->vbe_modes[i].bytes_per_scan_line * | |
1449 | par->vbe_modes[i].y_res; | |
1450 | if (h > size_remap) | |
1451 | size_remap = h; | |
1452 | } | |
1453 | size_remap *= 2; | |
1454 | ||
1455 | /* | |
1456 | * size_vmode -- that is the amount of memory needed for the | |
1457 | * used video mode, i.e. the minimum amount of | |
1458 | * memory we need. | |
1459 | */ | |
92559977 | 1460 | size_vmode = info->var.yres * mode->bytes_per_scan_line; |
8bdb3a2d MJ |
1461 | |
1462 | /* | |
1463 | * size_total -- all video memory we have. Used for mtrr | |
1464 | * entries, resource allocation and bounds | |
1465 | * checking. | |
1466 | */ | |
1467 | size_total = par->vbe_ib.total_memory * 65536; | |
1468 | if (vram_total) | |
1469 | size_total = vram_total * 1024 * 1024; | |
1470 | if (size_total < size_vmode) | |
1471 | size_total = size_vmode; | |
1472 | ||
1473 | /* | |
1474 | * size_remap -- the amount of video memory we are going to | |
1475 | * use for vesafb. With modern cards it is no | |
1476 | * option to simply use size_total as th | |
1477 | * wastes plenty of kernel address space. | |
1478 | */ | |
1479 | if (vram_remap) | |
1480 | size_remap = vram_remap * 1024 * 1024; | |
1481 | if (size_remap < size_vmode) | |
1482 | size_remap = size_vmode; | |
1483 | if (size_remap > size_total) | |
1484 | size_remap = size_total; | |
1485 | ||
1486 | info->fix.smem_len = size_remap; | |
1487 | info->fix.smem_start = mode->phys_base_ptr; | |
1488 | ||
1489 | /* | |
1490 | * We have to set yres_virtual here because when setup_var() was | |
1491 | * called, smem_len wasn't defined yet. | |
1492 | */ | |
1493 | info->var.yres_virtual = info->fix.smem_len / | |
1494 | mode->bytes_per_scan_line; | |
1495 | ||
1496 | if (par->ypan && info->var.yres_virtual > info->var.yres) { | |
a8feae09 | 1497 | pr_info("scrolling: %s using protected mode interface, yres_virtual=%d\n", |
8bdb3a2d MJ |
1498 | (par->ypan > 1) ? "ywrap" : "ypan", |
1499 | info->var.yres_virtual); | |
1500 | } else { | |
a8feae09 | 1501 | pr_info("scrolling: redraw\n"); |
8bdb3a2d MJ |
1502 | info->var.yres_virtual = info->var.yres; |
1503 | par->ypan = 0; | |
1504 | } | |
1505 | ||
1506 | info->flags = FBINFO_FLAG_DEFAULT | | |
1cc9fb6d | 1507 | (par->ypan ? FBINFO_HWACCEL_YPAN : 0); |
8bdb3a2d MJ |
1508 | |
1509 | if (!par->ypan) | |
1510 | info->fbops->fb_pan_display = NULL; | |
1511 | } | |
1512 | ||
48c68c4f | 1513 | static void uvesafb_init_mtrr(struct fb_info *info) |
8bdb3a2d | 1514 | { |
63e28a7a AL |
1515 | struct uvesafb_par *par = info->par; |
1516 | ||
8bdb3a2d MJ |
1517 | if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) { |
1518 | int temp_size = info->fix.smem_len; | |
8bdb3a2d | 1519 | |
63e28a7a | 1520 | int rc; |
8bdb3a2d | 1521 | |
63e28a7a AL |
1522 | /* Find the largest power-of-two */ |
1523 | temp_size = roundup_pow_of_two(temp_size); | |
8bdb3a2d | 1524 | |
63e28a7a AL |
1525 | /* Try and find a power of two to add */ |
1526 | do { | |
1527 | rc = arch_phys_wc_add(info->fix.smem_start, temp_size); | |
1528 | temp_size >>= 1; | |
1529 | } while (temp_size >= PAGE_SIZE && rc == -EINVAL); | |
8bdb3a2d | 1530 | |
63e28a7a AL |
1531 | if (rc >= 0) |
1532 | par->mtrr_handle = rc; | |
8bdb3a2d | 1533 | } |
8bdb3a2d MJ |
1534 | } |
1535 | ||
48c68c4f | 1536 | static void uvesafb_ioremap(struct fb_info *info) |
803a4e14 | 1537 | { |
63e28a7a | 1538 | info->screen_base = ioremap_wc(info->fix.smem_start, info->fix.smem_len); |
803a4e14 | 1539 | } |
8bdb3a2d MJ |
1540 | |
1541 | static ssize_t uvesafb_show_vbe_ver(struct device *dev, | |
1542 | struct device_attribute *attr, char *buf) | |
1543 | { | |
1544 | struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); | |
1545 | struct uvesafb_par *par = info->par; | |
1546 | ||
1547 | return snprintf(buf, PAGE_SIZE, "%.4x\n", par->vbe_ib.vbe_version); | |
1548 | } | |
1549 | ||
1550 | static DEVICE_ATTR(vbe_version, S_IRUGO, uvesafb_show_vbe_ver, NULL); | |
1551 | ||
1552 | static ssize_t uvesafb_show_vbe_modes(struct device *dev, | |
1553 | struct device_attribute *attr, char *buf) | |
1554 | { | |
1555 | struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); | |
1556 | struct uvesafb_par *par = info->par; | |
1557 | int ret = 0, i; | |
1558 | ||
1559 | for (i = 0; i < par->vbe_modes_cnt && ret < PAGE_SIZE; i++) { | |
1560 | ret += snprintf(buf + ret, PAGE_SIZE - ret, | |
1561 | "%dx%d-%d, 0x%.4x\n", | |
1562 | par->vbe_modes[i].x_res, par->vbe_modes[i].y_res, | |
1563 | par->vbe_modes[i].depth, par->vbe_modes[i].mode_id); | |
1564 | } | |
1565 | ||
1566 | return ret; | |
1567 | } | |
1568 | ||
1569 | static DEVICE_ATTR(vbe_modes, S_IRUGO, uvesafb_show_vbe_modes, NULL); | |
1570 | ||
1571 | static ssize_t uvesafb_show_vendor(struct device *dev, | |
1572 | struct device_attribute *attr, char *buf) | |
1573 | { | |
1574 | struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); | |
1575 | struct uvesafb_par *par = info->par; | |
1576 | ||
1577 | if (par->vbe_ib.oem_vendor_name_ptr) | |
1578 | return snprintf(buf, PAGE_SIZE, "%s\n", (char *) | |
1579 | (&par->vbe_ib) + par->vbe_ib.oem_vendor_name_ptr); | |
1580 | else | |
1581 | return 0; | |
1582 | } | |
1583 | ||
1584 | static DEVICE_ATTR(oem_vendor, S_IRUGO, uvesafb_show_vendor, NULL); | |
1585 | ||
1586 | static ssize_t uvesafb_show_product_name(struct device *dev, | |
1587 | struct device_attribute *attr, char *buf) | |
1588 | { | |
1589 | struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); | |
1590 | struct uvesafb_par *par = info->par; | |
1591 | ||
1592 | if (par->vbe_ib.oem_product_name_ptr) | |
1593 | return snprintf(buf, PAGE_SIZE, "%s\n", (char *) | |
1594 | (&par->vbe_ib) + par->vbe_ib.oem_product_name_ptr); | |
1595 | else | |
1596 | return 0; | |
1597 | } | |
1598 | ||
1599 | static DEVICE_ATTR(oem_product_name, S_IRUGO, uvesafb_show_product_name, NULL); | |
1600 | ||
1601 | static ssize_t uvesafb_show_product_rev(struct device *dev, | |
1602 | struct device_attribute *attr, char *buf) | |
1603 | { | |
1604 | struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); | |
1605 | struct uvesafb_par *par = info->par; | |
1606 | ||
1607 | if (par->vbe_ib.oem_product_rev_ptr) | |
1608 | return snprintf(buf, PAGE_SIZE, "%s\n", (char *) | |
1609 | (&par->vbe_ib) + par->vbe_ib.oem_product_rev_ptr); | |
1610 | else | |
1611 | return 0; | |
1612 | } | |
1613 | ||
1614 | static DEVICE_ATTR(oem_product_rev, S_IRUGO, uvesafb_show_product_rev, NULL); | |
1615 | ||
1616 | static ssize_t uvesafb_show_oem_string(struct device *dev, | |
1617 | struct device_attribute *attr, char *buf) | |
1618 | { | |
1619 | struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); | |
1620 | struct uvesafb_par *par = info->par; | |
1621 | ||
1622 | if (par->vbe_ib.oem_string_ptr) | |
1623 | return snprintf(buf, PAGE_SIZE, "%s\n", | |
1624 | (char *)(&par->vbe_ib) + par->vbe_ib.oem_string_ptr); | |
1625 | else | |
1626 | return 0; | |
1627 | } | |
1628 | ||
1629 | static DEVICE_ATTR(oem_string, S_IRUGO, uvesafb_show_oem_string, NULL); | |
1630 | ||
1631 | static ssize_t uvesafb_show_nocrtc(struct device *dev, | |
1632 | struct device_attribute *attr, char *buf) | |
1633 | { | |
1634 | struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); | |
1635 | struct uvesafb_par *par = info->par; | |
1636 | ||
1637 | return snprintf(buf, PAGE_SIZE, "%d\n", par->nocrtc); | |
1638 | } | |
1639 | ||
1640 | static ssize_t uvesafb_store_nocrtc(struct device *dev, | |
1641 | struct device_attribute *attr, const char *buf, size_t count) | |
1642 | { | |
1643 | struct fb_info *info = platform_get_drvdata(to_platform_device(dev)); | |
1644 | struct uvesafb_par *par = info->par; | |
1645 | ||
1646 | if (count > 0) { | |
1647 | if (buf[0] == '0') | |
1648 | par->nocrtc = 0; | |
1649 | else | |
1650 | par->nocrtc = 1; | |
1651 | } | |
1652 | return count; | |
1653 | } | |
1654 | ||
1655 | static DEVICE_ATTR(nocrtc, S_IRUGO | S_IWUSR, uvesafb_show_nocrtc, | |
1656 | uvesafb_store_nocrtc); | |
1657 | ||
1658 | static struct attribute *uvesafb_dev_attrs[] = { | |
1659 | &dev_attr_vbe_version.attr, | |
1660 | &dev_attr_vbe_modes.attr, | |
1661 | &dev_attr_oem_vendor.attr, | |
1662 | &dev_attr_oem_product_name.attr, | |
1663 | &dev_attr_oem_product_rev.attr, | |
1664 | &dev_attr_oem_string.attr, | |
1665 | &dev_attr_nocrtc.attr, | |
1666 | NULL, | |
1667 | }; | |
1668 | ||
1669 | static struct attribute_group uvesafb_dev_attgrp = { | |
1670 | .name = NULL, | |
1671 | .attrs = uvesafb_dev_attrs, | |
1672 | }; | |
1673 | ||
48c68c4f | 1674 | static int uvesafb_probe(struct platform_device *dev) |
8bdb3a2d MJ |
1675 | { |
1676 | struct fb_info *info; | |
1677 | struct vbe_mode_ib *mode = NULL; | |
1678 | struct uvesafb_par *par; | |
1679 | int err = 0, i; | |
1680 | ||
1681 | info = framebuffer_alloc(sizeof(*par) + sizeof(u32) * 256, &dev->dev); | |
1682 | if (!info) | |
1683 | return -ENOMEM; | |
1684 | ||
1685 | par = info->par; | |
1686 | ||
1687 | err = uvesafb_vbe_init(info); | |
1688 | if (err) { | |
a8feae09 | 1689 | pr_err("vbe_init() failed with %d\n", err); |
8bdb3a2d MJ |
1690 | goto out; |
1691 | } | |
1692 | ||
1693 | info->fbops = &uvesafb_ops; | |
1694 | ||
1695 | i = uvesafb_vbe_init_mode(info); | |
1696 | if (i < 0) { | |
1697 | err = -EINVAL; | |
1698 | goto out; | |
1699 | } else { | |
1700 | mode = &par->vbe_modes[i]; | |
1701 | } | |
1702 | ||
1703 | if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) { | |
1704 | err = -ENXIO; | |
1705 | goto out; | |
1706 | } | |
1707 | ||
1708 | uvesafb_init_info(info, mode); | |
1709 | ||
803a4e14 | 1710 | if (!request_region(0x3c0, 32, "uvesafb")) { |
a8feae09 | 1711 | pr_err("request region 0x3c0-0x3e0 failed\n"); |
803a4e14 TS |
1712 | err = -EIO; |
1713 | goto out_mode; | |
1714 | } | |
1715 | ||
8bdb3a2d MJ |
1716 | if (!request_mem_region(info->fix.smem_start, info->fix.smem_len, |
1717 | "uvesafb")) { | |
a8feae09 JP |
1718 | pr_err("cannot reserve video memory at 0x%lx\n", |
1719 | info->fix.smem_start); | |
8bdb3a2d | 1720 | err = -EIO; |
803a4e14 | 1721 | goto out_reg; |
8bdb3a2d MJ |
1722 | } |
1723 | ||
803a4e14 TS |
1724 | uvesafb_init_mtrr(info); |
1725 | uvesafb_ioremap(info); | |
8bdb3a2d MJ |
1726 | |
1727 | if (!info->screen_base) { | |
a8feae09 JP |
1728 | pr_err("abort, cannot ioremap 0x%x bytes of video memory at 0x%lx\n", |
1729 | info->fix.smem_len, info->fix.smem_start); | |
8bdb3a2d MJ |
1730 | err = -EIO; |
1731 | goto out_mem; | |
1732 | } | |
1733 | ||
8bdb3a2d MJ |
1734 | platform_set_drvdata(dev, info); |
1735 | ||
1736 | if (register_framebuffer(info) < 0) { | |
a8feae09 | 1737 | pr_err("failed to register framebuffer device\n"); |
8bdb3a2d | 1738 | err = -EINVAL; |
803a4e14 | 1739 | goto out_unmap; |
8bdb3a2d MJ |
1740 | } |
1741 | ||
a8feae09 JP |
1742 | pr_info("framebuffer at 0x%lx, mapped to 0x%p, using %dk, total %dk\n", |
1743 | info->fix.smem_start, info->screen_base, | |
1744 | info->fix.smem_len / 1024, par->vbe_ib.total_memory * 64); | |
31b6780c | 1745 | fb_info(info, "%s frame buffer device\n", info->fix.id); |
8bdb3a2d MJ |
1746 | |
1747 | err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp); | |
1748 | if (err != 0) | |
31b6780c | 1749 | fb_warn(info, "failed to register attributes\n"); |
8bdb3a2d MJ |
1750 | |
1751 | return 0; | |
1752 | ||
8bdb3a2d MJ |
1753 | out_unmap: |
1754 | iounmap(info->screen_base); | |
1755 | out_mem: | |
1756 | release_mem_region(info->fix.smem_start, info->fix.smem_len); | |
803a4e14 TS |
1757 | out_reg: |
1758 | release_region(0x3c0, 32); | |
8bdb3a2d MJ |
1759 | out_mode: |
1760 | if (!list_empty(&info->modelist)) | |
1761 | fb_destroy_modelist(&info->modelist); | |
1762 | fb_destroy_modedb(info->monspecs.modedb); | |
1763 | fb_dealloc_cmap(&info->cmap); | |
1764 | out: | |
b1dfee60 | 1765 | kfree(par->vbe_modes); |
8bdb3a2d MJ |
1766 | |
1767 | framebuffer_release(info); | |
1768 | return err; | |
1769 | } | |
1770 | ||
1771 | static int uvesafb_remove(struct platform_device *dev) | |
1772 | { | |
1773 | struct fb_info *info = platform_get_drvdata(dev); | |
1774 | ||
1775 | if (info) { | |
1776 | struct uvesafb_par *par = info->par; | |
1777 | ||
1778 | sysfs_remove_group(&dev->dev.kobj, &uvesafb_dev_attgrp); | |
1779 | unregister_framebuffer(info); | |
1780 | release_region(0x3c0, 32); | |
1781 | iounmap(info->screen_base); | |
63e28a7a | 1782 | arch_phys_wc_del(par->mtrr_handle); |
8bdb3a2d MJ |
1783 | release_mem_region(info->fix.smem_start, info->fix.smem_len); |
1784 | fb_destroy_modedb(info->monspecs.modedb); | |
1785 | fb_dealloc_cmap(&info->cmap); | |
1786 | ||
a57aa93f WY |
1787 | kfree(par->vbe_modes); |
1788 | kfree(par->vbe_state_orig); | |
1789 | kfree(par->vbe_state_saved); | |
8bdb3a2d MJ |
1790 | |
1791 | framebuffer_release(info); | |
1792 | } | |
1793 | return 0; | |
1794 | } | |
1795 | ||
1796 | static struct platform_driver uvesafb_driver = { | |
1797 | .probe = uvesafb_probe, | |
1798 | .remove = uvesafb_remove, | |
1799 | .driver = { | |
1800 | .name = "uvesafb", | |
1801 | }, | |
1802 | }; | |
1803 | ||
1804 | static struct platform_device *uvesafb_device; | |
1805 | ||
1806 | #ifndef MODULE | |
48c68c4f | 1807 | static int uvesafb_setup(char *options) |
8bdb3a2d MJ |
1808 | { |
1809 | char *this_opt; | |
1810 | ||
1811 | if (!options || !*options) | |
1812 | return 0; | |
1813 | ||
1814 | while ((this_opt = strsep(&options, ",")) != NULL) { | |
1815 | if (!*this_opt) continue; | |
1816 | ||
1817 | if (!strcmp(this_opt, "redraw")) | |
1818 | ypan = 0; | |
1819 | else if (!strcmp(this_opt, "ypan")) | |
1820 | ypan = 1; | |
1821 | else if (!strcmp(this_opt, "ywrap")) | |
1822 | ypan = 2; | |
1823 | else if (!strcmp(this_opt, "vgapal")) | |
1824 | pmi_setpal = 0; | |
1825 | else if (!strcmp(this_opt, "pmipal")) | |
1826 | pmi_setpal = 1; | |
1827 | else if (!strncmp(this_opt, "mtrr:", 5)) | |
1828 | mtrr = simple_strtoul(this_opt+5, NULL, 0); | |
1829 | else if (!strcmp(this_opt, "nomtrr")) | |
1830 | mtrr = 0; | |
1831 | else if (!strcmp(this_opt, "nocrtc")) | |
1832 | nocrtc = 1; | |
1833 | else if (!strcmp(this_opt, "noedid")) | |
1834 | noedid = 1; | |
1835 | else if (!strcmp(this_opt, "noblank")) | |
1836 | blank = 0; | |
1837 | else if (!strncmp(this_opt, "vtotal:", 7)) | |
1838 | vram_total = simple_strtoul(this_opt + 7, NULL, 0); | |
1839 | else if (!strncmp(this_opt, "vremap:", 7)) | |
1840 | vram_remap = simple_strtoul(this_opt + 7, NULL, 0); | |
1841 | else if (!strncmp(this_opt, "maxhf:", 6)) | |
1842 | maxhf = simple_strtoul(this_opt + 6, NULL, 0); | |
1843 | else if (!strncmp(this_opt, "maxvf:", 6)) | |
1844 | maxvf = simple_strtoul(this_opt + 6, NULL, 0); | |
1845 | else if (!strncmp(this_opt, "maxclk:", 7)) | |
1846 | maxclk = simple_strtoul(this_opt + 7, NULL, 0); | |
1847 | else if (!strncmp(this_opt, "vbemode:", 8)) | |
1848 | vbemode = simple_strtoul(this_opt + 8, NULL, 0); | |
1849 | else if (this_opt[0] >= '0' && this_opt[0] <= '9') { | |
1850 | mode_option = this_opt; | |
1851 | } else { | |
a8feae09 | 1852 | pr_warn("unrecognized option %s\n", this_opt); |
8bdb3a2d MJ |
1853 | } |
1854 | } | |
1855 | ||
d1ce3d54 | 1856 | if (mtrr != 3 && mtrr != 0) |
63e28a7a AL |
1857 | pr_warn("uvesafb: mtrr should be set to 0 or 3; %d is unsupported", mtrr); |
1858 | ||
8bdb3a2d MJ |
1859 | return 0; |
1860 | } | |
1861 | #endif /* !MODULE */ | |
1862 | ||
1863 | static ssize_t show_v86d(struct device_driver *dev, char *buf) | |
1864 | { | |
1865 | return snprintf(buf, PAGE_SIZE, "%s\n", v86d_path); | |
1866 | } | |
1867 | ||
1868 | static ssize_t store_v86d(struct device_driver *dev, const char *buf, | |
1869 | size_t count) | |
1870 | { | |
1871 | strncpy(v86d_path, buf, PATH_MAX); | |
1872 | return count; | |
1873 | } | |
1874 | ||
1875 | static DRIVER_ATTR(v86d, S_IRUGO | S_IWUSR, show_v86d, store_v86d); | |
1876 | ||
48c68c4f | 1877 | static int uvesafb_init(void) |
8bdb3a2d MJ |
1878 | { |
1879 | int err; | |
1880 | ||
1881 | #ifndef MODULE | |
1882 | char *option = NULL; | |
1883 | ||
1884 | if (fb_get_options("uvesafb", &option)) | |
1885 | return -ENODEV; | |
1886 | uvesafb_setup(option); | |
1887 | #endif | |
1888 | err = cn_add_callback(&uvesafb_cn_id, "uvesafb", uvesafb_cn_callback); | |
1889 | if (err) | |
1890 | return err; | |
1891 | ||
1892 | err = platform_driver_register(&uvesafb_driver); | |
1893 | ||
1894 | if (!err) { | |
1895 | uvesafb_device = platform_device_alloc("uvesafb", 0); | |
1896 | if (uvesafb_device) | |
1897 | err = platform_device_add(uvesafb_device); | |
1898 | else | |
1899 | err = -ENOMEM; | |
1900 | ||
1901 | if (err) { | |
34685627 | 1902 | platform_device_put(uvesafb_device); |
8bdb3a2d MJ |
1903 | platform_driver_unregister(&uvesafb_driver); |
1904 | cn_del_callback(&uvesafb_cn_id); | |
1905 | return err; | |
1906 | } | |
1907 | ||
1908 | err = driver_create_file(&uvesafb_driver.driver, | |
1909 | &driver_attr_v86d); | |
1910 | if (err) { | |
a8feae09 | 1911 | pr_warn("failed to register attributes\n"); |
8bdb3a2d MJ |
1912 | err = 0; |
1913 | } | |
1914 | } | |
1915 | return err; | |
1916 | } | |
1917 | ||
1918 | module_init(uvesafb_init); | |
1919 | ||
48c68c4f | 1920 | static void uvesafb_exit(void) |
8bdb3a2d MJ |
1921 | { |
1922 | struct uvesafb_ktask *task; | |
1923 | ||
1924 | if (v86d_started) { | |
1925 | task = uvesafb_prep(); | |
1926 | if (task) { | |
1927 | task->t.flags = TF_EXIT; | |
1928 | uvesafb_exec(task); | |
1929 | uvesafb_free(task); | |
1930 | } | |
1931 | } | |
1932 | ||
1933 | cn_del_callback(&uvesafb_cn_id); | |
1934 | driver_remove_file(&uvesafb_driver.driver, &driver_attr_v86d); | |
1935 | platform_device_unregister(uvesafb_device); | |
1936 | platform_driver_unregister(&uvesafb_driver); | |
1937 | } | |
1938 | ||
1939 | module_exit(uvesafb_exit); | |
1940 | ||
9bbb9e5a | 1941 | static int param_set_scroll(const char *val, const struct kernel_param *kp) |
8bdb3a2d MJ |
1942 | { |
1943 | ypan = 0; | |
1944 | ||
1945 | if (!strcmp(val, "redraw")) | |
1946 | ypan = 0; | |
1947 | else if (!strcmp(val, "ypan")) | |
1948 | ypan = 1; | |
1949 | else if (!strcmp(val, "ywrap")) | |
1950 | ypan = 2; | |
2ead9439 RR |
1951 | else |
1952 | return -EINVAL; | |
8bdb3a2d MJ |
1953 | |
1954 | return 0; | |
1955 | } | |
9c27847d | 1956 | static const struct kernel_param_ops param_ops_scroll = { |
9bbb9e5a RR |
1957 | .set = param_set_scroll, |
1958 | }; | |
5eb03a4a | 1959 | #define param_check_scroll(name, p) __param_check(name, p, void) |
8bdb3a2d MJ |
1960 | |
1961 | module_param_named(scroll, ypan, scroll, 0); | |
1962 | MODULE_PARM_DESC(scroll, | |
5eb03a4a | 1963 | "Scrolling mode, set to 'redraw', 'ypan', or 'ywrap'"); |
8bdb3a2d MJ |
1964 | module_param_named(vgapal, pmi_setpal, invbool, 0); |
1965 | MODULE_PARM_DESC(vgapal, "Set palette using VGA registers"); | |
1966 | module_param_named(pmipal, pmi_setpal, bool, 0); | |
1967 | MODULE_PARM_DESC(pmipal, "Set palette using PMI calls"); | |
1968 | module_param(mtrr, uint, 0); | |
1969 | MODULE_PARM_DESC(mtrr, | |
1970 | "Memory Type Range Registers setting. Use 0 to disable."); | |
1971 | module_param(blank, bool, 0); | |
1972 | MODULE_PARM_DESC(blank, "Enable hardware blanking"); | |
1973 | module_param(nocrtc, bool, 0); | |
1974 | MODULE_PARM_DESC(nocrtc, "Ignore CRTC timings when setting modes"); | |
1975 | module_param(noedid, bool, 0); | |
1976 | MODULE_PARM_DESC(noedid, | |
1977 | "Ignore EDID-provided monitor limits when setting modes"); | |
1978 | module_param(vram_remap, uint, 0); | |
1979 | MODULE_PARM_DESC(vram_remap, "Set amount of video memory to be used [MiB]"); | |
1980 | module_param(vram_total, uint, 0); | |
1981 | MODULE_PARM_DESC(vram_total, "Set total amount of video memoery [MiB]"); | |
1982 | module_param(maxclk, ushort, 0); | |
1983 | MODULE_PARM_DESC(maxclk, "Maximum pixelclock [MHz], overrides EDID data"); | |
1984 | module_param(maxhf, ushort, 0); | |
1985 | MODULE_PARM_DESC(maxhf, | |
1986 | "Maximum horizontal frequency [kHz], overrides EDID data"); | |
1987 | module_param(maxvf, ushort, 0); | |
1988 | MODULE_PARM_DESC(maxvf, | |
1989 | "Maximum vertical frequency [Hz], overrides EDID data"); | |
012e2609 KH |
1990 | module_param(mode_option, charp, 0); |
1991 | MODULE_PARM_DESC(mode_option, | |
8bdb3a2d MJ |
1992 | "Specify initial video mode as \"<xres>x<yres>[-<bpp>][@<refresh>]\""); |
1993 | module_param(vbemode, ushort, 0); | |
1994 | MODULE_PARM_DESC(vbemode, | |
1995 | "VBE mode number to set, overrides the 'mode' option"); | |
1996 | module_param_string(v86d, v86d_path, PATH_MAX, 0660); | |
1997 | MODULE_PARM_DESC(v86d, "Path to the v86d userspace helper."); | |
1998 | ||
1999 | MODULE_LICENSE("GPL"); | |
2000 | MODULE_AUTHOR("Michal Januszewski <spock@gentoo.org>"); | |
2001 | MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards"); | |
2002 |