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1da177e4 LT |
1 | /* |
2 | * Linux/SPARC PROM Configuration Driver | |
3 | * Copyright (C) 1996 Thomas K. Dyas (tdyas@noc.rutgers.edu) | |
4 | * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be) | |
5 | * | |
6 | * This character device driver allows user programs to access the | |
7 | * PROM device tree. It is compatible with the SunOS /dev/openprom | |
8 | * driver and the NetBSD /dev/openprom driver. The SunOS eeprom | |
9 | * utility works without any modifications. | |
10 | * | |
11 | * The driver uses a minor number under the misc device major. The | |
12 | * file read/write mode determines the type of access to the PROM. | |
13 | * Interrupts are disabled whenever the driver calls into the PROM for | |
14 | * sanity's sake. | |
15 | */ | |
16 | ||
17 | /* This program is free software; you can redistribute it and/or | |
18 | * modify it under the terms of the GNU General Public License as | |
19 | * published by the Free Software Foundation; either version 2 of the | |
20 | * License, or (at your option) any later version. | |
21 | * | |
22 | * This program is distributed in the hope that it will be useful, but | |
23 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
25 | * General Public License for more details. | |
26 | * | |
27 | * You should have received a copy of the GNU General Public License | |
28 | * along with this program; if not, write to the Free Software | |
29 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
30 | */ | |
31 | ||
1da177e4 LT |
32 | #include <linux/module.h> |
33 | #include <linux/kernel.h> | |
34 | #include <linux/sched.h> | |
35 | #include <linux/errno.h> | |
36 | #include <linux/slab.h> | |
37 | #include <linux/string.h> | |
38 | #include <linux/miscdevice.h> | |
39 | #include <linux/init.h> | |
40 | #include <linux/fs.h> | |
41 | #include <asm/oplib.h> | |
8e48aec7 | 42 | #include <asm/prom.h> |
1da177e4 LT |
43 | #include <asm/system.h> |
44 | #include <asm/uaccess.h> | |
45 | #include <asm/openpromio.h> | |
46 | #ifdef CONFIG_PCI | |
47 | #include <linux/pci.h> | |
48 | #include <asm/pbm.h> | |
49 | #endif | |
50 | ||
8e48aec7 DM |
51 | MODULE_AUTHOR("Thomas K. Dyas (tdyas@noc.rutgers.edu) and Eddie C. Dost (ecd@skynet.be)"); |
52 | MODULE_DESCRIPTION("OPENPROM Configuration Driver"); | |
53 | MODULE_LICENSE("GPL"); | |
54 | MODULE_VERSION("1.0"); | |
55 | ||
1da177e4 LT |
56 | /* Private data kept by the driver for each descriptor. */ |
57 | typedef struct openprom_private_data | |
58 | { | |
8e48aec7 DM |
59 | struct device_node *current_node; /* Current node for SunOS ioctls. */ |
60 | struct device_node *lastnode; /* Last valid node used by BSD ioctls. */ | |
1da177e4 LT |
61 | } DATA; |
62 | ||
63 | /* ID of the PROM node containing all of the EEPROM options. */ | |
8e48aec7 | 64 | static struct device_node *options_node; |
1da177e4 LT |
65 | |
66 | /* | |
67 | * Copy an openpromio structure into kernel space from user space. | |
68 | * This routine does error checking to make sure that all memory | |
69 | * accesses are within bounds. A pointer to the allocated openpromio | |
70 | * structure will be placed in "*opp_p". Return value is the length | |
71 | * of the user supplied buffer. | |
72 | */ | |
73 | static int copyin(struct openpromio __user *info, struct openpromio **opp_p) | |
74 | { | |
75 | unsigned int bufsize; | |
76 | ||
77 | if (!info || !opp_p) | |
78 | return -EFAULT; | |
79 | ||
80 | if (get_user(bufsize, &info->oprom_size)) | |
81 | return -EFAULT; | |
82 | ||
83 | if (bufsize == 0) | |
84 | return -EINVAL; | |
85 | ||
86 | /* If the bufsize is too large, just limit it. | |
87 | * Fix from Jason Rappleye. | |
88 | */ | |
89 | if (bufsize > OPROMMAXPARAM) | |
90 | bufsize = OPROMMAXPARAM; | |
91 | ||
8e48aec7 | 92 | if (!(*opp_p = kzalloc(sizeof(int) + bufsize + 1, GFP_KERNEL))) |
1da177e4 | 93 | return -ENOMEM; |
1da177e4 LT |
94 | |
95 | if (copy_from_user(&(*opp_p)->oprom_array, | |
96 | &info->oprom_array, bufsize)) { | |
97 | kfree(*opp_p); | |
98 | return -EFAULT; | |
99 | } | |
100 | return bufsize; | |
101 | } | |
102 | ||
103 | static int getstrings(struct openpromio __user *info, struct openpromio **opp_p) | |
104 | { | |
105 | int n, bufsize; | |
106 | char c; | |
107 | ||
108 | if (!info || !opp_p) | |
109 | return -EFAULT; | |
110 | ||
8e48aec7 | 111 | if (!(*opp_p = kzalloc(sizeof(int) + OPROMMAXPARAM + 1, GFP_KERNEL))) |
1da177e4 LT |
112 | return -ENOMEM; |
113 | ||
1da177e4 LT |
114 | (*opp_p)->oprom_size = 0; |
115 | ||
116 | n = bufsize = 0; | |
117 | while ((n < 2) && (bufsize < OPROMMAXPARAM)) { | |
118 | if (get_user(c, &info->oprom_array[bufsize])) { | |
119 | kfree(*opp_p); | |
120 | return -EFAULT; | |
121 | } | |
122 | if (c == '\0') | |
123 | n++; | |
124 | (*opp_p)->oprom_array[bufsize++] = c; | |
125 | } | |
126 | if (!n) { | |
127 | kfree(*opp_p); | |
128 | return -EINVAL; | |
129 | } | |
130 | return bufsize; | |
131 | } | |
132 | ||
133 | /* | |
134 | * Copy an openpromio structure in kernel space back to user space. | |
135 | */ | |
136 | static int copyout(void __user *info, struct openpromio *opp, int len) | |
137 | { | |
138 | if (copy_to_user(info, opp, len)) | |
139 | return -EFAULT; | |
140 | return 0; | |
141 | } | |
142 | ||
8e48aec7 DM |
143 | static int opromgetprop(void __user *argp, struct device_node *dp, struct openpromio *op, int bufsize) |
144 | { | |
145 | void *pval; | |
146 | int len; | |
147 | ||
148 | pval = of_get_property(dp, op->oprom_array, &len); | |
149 | if (!pval || len <= 0 || len > bufsize) | |
150 | return copyout(argp, op, sizeof(int)); | |
151 | ||
152 | memcpy(op->oprom_array, pval, len); | |
153 | op->oprom_array[len] = '\0'; | |
154 | op->oprom_size = len; | |
155 | ||
156 | return copyout(argp, op, sizeof(int) + bufsize); | |
157 | } | |
158 | ||
159 | static int opromnxtprop(void __user *argp, struct device_node *dp, struct openpromio *op, int bufsize) | |
160 | { | |
161 | struct property *prop; | |
162 | int len; | |
163 | ||
164 | if (op->oprom_array[0] == '\0') { | |
165 | prop = dp->properties; | |
166 | if (!prop) | |
167 | return copyout(argp, op, sizeof(int)); | |
168 | len = strlen(prop->name); | |
169 | } else { | |
170 | prop = of_find_property(dp, op->oprom_array, NULL); | |
171 | ||
172 | if (!prop || | |
173 | !prop->next || | |
174 | (len = strlen(prop->next->name)) + 1 > bufsize) | |
175 | return copyout(argp, op, sizeof(int)); | |
176 | ||
177 | prop = prop->next; | |
178 | } | |
179 | ||
180 | memcpy(op->oprom_array, prop->name, len); | |
181 | op->oprom_array[len] = '\0'; | |
182 | op->oprom_size = ++len; | |
183 | ||
184 | return copyout(argp, op, sizeof(int) + bufsize); | |
185 | } | |
186 | ||
187 | static int opromsetopt(struct device_node *dp, struct openpromio *op, int bufsize) | |
188 | { | |
189 | char *buf = op->oprom_array + strlen(op->oprom_array) + 1; | |
190 | int len = op->oprom_array + bufsize - buf; | |
191 | ||
192 | return of_set_property(options_node, op->oprom_array, buf, len); | |
193 | } | |
194 | ||
195 | static int opromnext(void __user *argp, unsigned int cmd, struct device_node *dp, struct openpromio *op, int bufsize, DATA *data) | |
196 | { | |
197 | phandle ph; | |
198 | ||
199 | BUILD_BUG_ON(sizeof(phandle) != sizeof(int)); | |
200 | ||
201 | if (bufsize < sizeof(phandle)) | |
202 | return -EINVAL; | |
203 | ||
204 | ph = *((int *) op->oprom_array); | |
205 | if (ph) { | |
206 | dp = of_find_node_by_phandle(ph); | |
207 | if (!dp) | |
208 | return -EINVAL; | |
209 | ||
210 | switch (cmd) { | |
211 | case OPROMNEXT: | |
212 | dp = dp->sibling; | |
213 | break; | |
214 | ||
215 | case OPROMCHILD: | |
216 | dp = dp->child; | |
217 | break; | |
218 | ||
219 | case OPROMSETCUR: | |
220 | default: | |
221 | break; | |
222 | }; | |
223 | } else { | |
224 | /* Sibling of node zero is the root node. */ | |
225 | if (cmd != OPROMNEXT) | |
226 | return -EINVAL; | |
227 | ||
228 | dp = of_find_node_by_path("/"); | |
229 | } | |
230 | ||
231 | ph = 0; | |
232 | if (dp) | |
233 | ph = dp->node; | |
234 | ||
235 | data->current_node = dp; | |
236 | *((int *) op->oprom_array) = ph; | |
237 | op->oprom_size = sizeof(phandle); | |
238 | ||
239 | return copyout(argp, op, bufsize + sizeof(int)); | |
240 | } | |
241 | ||
242 | static int oprompci2node(void __user *argp, struct device_node *dp, struct openpromio *op, int bufsize, DATA *data) | |
243 | { | |
244 | int err = -EINVAL; | |
245 | ||
246 | if (bufsize >= 2*sizeof(int)) { | |
247 | #ifdef CONFIG_PCI | |
248 | struct pci_dev *pdev; | |
249 | struct pcidev_cookie *pcp; | |
250 | pdev = pci_find_slot (((int *) op->oprom_array)[0], | |
251 | ((int *) op->oprom_array)[1]); | |
252 | ||
253 | pcp = pdev->sysdata; | |
254 | if (pcp != NULL) { | |
255 | dp = pcp->prom_node; | |
256 | data->current_node = dp; | |
257 | *((int *)op->oprom_array) = dp->node; | |
258 | op->oprom_size = sizeof(int); | |
259 | err = copyout(argp, op, bufsize + sizeof(int)); | |
260 | } | |
261 | #endif | |
262 | } | |
263 | ||
264 | return err; | |
265 | } | |
266 | ||
267 | static int oprompath2node(void __user *argp, struct device_node *dp, struct openpromio *op, int bufsize, DATA *data) | |
268 | { | |
269 | dp = of_find_node_by_path(op->oprom_array); | |
270 | data->current_node = dp; | |
271 | *((int *)op->oprom_array) = dp->node; | |
272 | op->oprom_size = sizeof(int); | |
273 | ||
274 | return copyout(argp, op, bufsize + sizeof(int)); | |
275 | } | |
276 | ||
277 | static int opromgetbootargs(void __user *argp, struct openpromio *op, int bufsize) | |
278 | { | |
279 | char *buf = saved_command_line; | |
280 | int len = strlen(buf); | |
281 | ||
282 | if (len > bufsize) | |
283 | return -EINVAL; | |
284 | ||
285 | strcpy(op->oprom_array, buf); | |
286 | op->oprom_size = len; | |
287 | ||
288 | return copyout(argp, op, bufsize + sizeof(int)); | |
289 | } | |
290 | ||
1da177e4 LT |
291 | /* |
292 | * SunOS and Solaris /dev/openprom ioctl calls. | |
293 | */ | |
294 | static int openprom_sunos_ioctl(struct inode * inode, struct file * file, | |
8e48aec7 DM |
295 | unsigned int cmd, unsigned long arg, |
296 | struct device_node *dp) | |
1da177e4 | 297 | { |
8e48aec7 | 298 | DATA *data = file->private_data; |
1da177e4 | 299 | struct openpromio *opp; |
8e48aec7 | 300 | int bufsize, error = 0; |
1da177e4 LT |
301 | static int cnt; |
302 | void __user *argp = (void __user *)arg; | |
303 | ||
304 | if (cmd == OPROMSETOPT) | |
305 | bufsize = getstrings(argp, &opp); | |
306 | else | |
307 | bufsize = copyin(argp, &opp); | |
308 | ||
309 | if (bufsize < 0) | |
310 | return bufsize; | |
311 | ||
312 | switch (cmd) { | |
313 | case OPROMGETOPT: | |
314 | case OPROMGETPROP: | |
8e48aec7 | 315 | error = opromgetprop(argp, dp, opp, bufsize); |
1da177e4 LT |
316 | break; |
317 | ||
318 | case OPROMNXTOPT: | |
319 | case OPROMNXTPROP: | |
8e48aec7 | 320 | error = opromnxtprop(argp, dp, opp, bufsize); |
1da177e4 LT |
321 | break; |
322 | ||
323 | case OPROMSETOPT: | |
324 | case OPROMSETOPT2: | |
8e48aec7 | 325 | error = opromsetopt(dp, opp, bufsize); |
1da177e4 LT |
326 | break; |
327 | ||
328 | case OPROMNEXT: | |
329 | case OPROMCHILD: | |
330 | case OPROMSETCUR: | |
8e48aec7 | 331 | error = opromnext(argp, cmd, dp, opp, bufsize, data); |
1da177e4 LT |
332 | break; |
333 | ||
334 | case OPROMPCI2NODE: | |
8e48aec7 | 335 | error = oprompci2node(argp, dp, opp, bufsize, data); |
1da177e4 LT |
336 | break; |
337 | ||
338 | case OPROMPATH2NODE: | |
8e48aec7 | 339 | error = oprompath2node(argp, dp, opp, bufsize, data); |
1da177e4 LT |
340 | break; |
341 | ||
342 | case OPROMGETBOOTARGS: | |
8e48aec7 | 343 | error = opromgetbootargs(argp, opp, bufsize); |
1da177e4 LT |
344 | break; |
345 | ||
346 | case OPROMU2P: | |
347 | case OPROMGETCONS: | |
348 | case OPROMGETFBNAME: | |
349 | if (cnt++ < 10) | |
350 | printk(KERN_INFO "openprom_sunos_ioctl: unimplemented ioctl\n"); | |
351 | error = -EINVAL; | |
352 | break; | |
353 | default: | |
354 | if (cnt++ < 10) | |
355 | printk(KERN_INFO "openprom_sunos_ioctl: cmd 0x%X, arg 0x%lX\n", cmd, arg); | |
356 | error = -EINVAL; | |
357 | break; | |
358 | } | |
359 | ||
360 | kfree(opp); | |
361 | return error; | |
362 | } | |
363 | ||
8e48aec7 | 364 | static struct device_node *get_node(phandle n, DATA *data) |
1da177e4 | 365 | { |
8e48aec7 | 366 | struct device_node *dp = of_find_node_by_phandle(n); |
1da177e4 | 367 | |
8e48aec7 DM |
368 | if (dp) |
369 | data->lastnode = dp; | |
370 | ||
371 | return dp; | |
1da177e4 LT |
372 | } |
373 | ||
374 | /* Copy in a whole string from userspace into kernelspace. */ | |
375 | static int copyin_string(char __user *user, size_t len, char **ptr) | |
376 | { | |
377 | char *tmp; | |
378 | ||
379 | if ((ssize_t)len < 0 || (ssize_t)(len + 1) < 0) | |
380 | return -EINVAL; | |
381 | ||
382 | tmp = kmalloc(len + 1, GFP_KERNEL); | |
383 | if (!tmp) | |
384 | return -ENOMEM; | |
385 | ||
8e48aec7 | 386 | if (copy_from_user(tmp, user, len)) { |
1da177e4 LT |
387 | kfree(tmp); |
388 | return -EFAULT; | |
389 | } | |
390 | ||
391 | tmp[len] = '\0'; | |
392 | ||
393 | *ptr = tmp; | |
394 | ||
395 | return 0; | |
396 | } | |
397 | ||
398 | /* | |
399 | * NetBSD /dev/openprom ioctl calls. | |
400 | */ | |
8e48aec7 | 401 | static int opiocget(void __user *argp, DATA *data) |
1da177e4 | 402 | { |
1da177e4 | 403 | struct opiocdesc op; |
8e48aec7 DM |
404 | struct device_node *dp; |
405 | char *str; | |
406 | void *pval; | |
407 | int err, len; | |
1da177e4 | 408 | |
8e48aec7 DM |
409 | if (copy_from_user(&op, argp, sizeof(op))) |
410 | return -EFAULT; | |
1da177e4 | 411 | |
8e48aec7 | 412 | dp = get_node(op.op_nodeid, data); |
1da177e4 | 413 | |
8e48aec7 DM |
414 | err = copyin_string(op.op_name, op.op_namelen, &str); |
415 | if (err) | |
416 | return err; | |
1da177e4 | 417 | |
8e48aec7 DM |
418 | pval = of_get_property(dp, str, &len); |
419 | err = 0; | |
420 | if (!pval || len > op.op_buflen) { | |
421 | err = -EINVAL; | |
422 | } else { | |
1da177e4 | 423 | op.op_buflen = len; |
8e48aec7 DM |
424 | if (copy_to_user(argp, &op, sizeof(op)) || |
425 | copy_to_user(op.op_buf, pval, len)) | |
426 | err = -EFAULT; | |
427 | } | |
428 | kfree(str); | |
1da177e4 | 429 | |
8e48aec7 DM |
430 | return err; |
431 | } | |
1da177e4 | 432 | |
8e48aec7 DM |
433 | static int opiocnextprop(void __user *argp, DATA *data) |
434 | { | |
435 | struct opiocdesc op; | |
436 | struct device_node *dp; | |
437 | struct property *prop; | |
438 | char *str; | |
439 | int err, len; | |
1da177e4 | 440 | |
8e48aec7 DM |
441 | if (copy_from_user(&op, argp, sizeof(op))) |
442 | return -EFAULT; | |
1da177e4 | 443 | |
8e48aec7 DM |
444 | dp = get_node(op.op_nodeid, data); |
445 | if (!dp) | |
446 | return -EINVAL; | |
1da177e4 | 447 | |
8e48aec7 DM |
448 | err = copyin_string(op.op_name, op.op_namelen, &str); |
449 | if (err) | |
450 | return err; | |
1da177e4 | 451 | |
8e48aec7 DM |
452 | if (str[0] == '\0') { |
453 | prop = dp->properties; | |
454 | } else { | |
455 | prop = of_find_property(dp, str, NULL); | |
456 | if (prop) | |
457 | prop = prop->next; | |
458 | } | |
459 | kfree(str); | |
1da177e4 | 460 | |
8e48aec7 DM |
461 | if (!prop) |
462 | len = 0; | |
463 | else | |
464 | len = prop->length; | |
1da177e4 | 465 | |
8e48aec7 DM |
466 | if (len > op.op_buflen) |
467 | len = op.op_buflen; | |
1da177e4 | 468 | |
8e48aec7 DM |
469 | if (copy_to_user(argp, &op, sizeof(op))) |
470 | return -EFAULT; | |
1da177e4 | 471 | |
8e48aec7 DM |
472 | if (len && |
473 | copy_to_user(op.op_buf, prop->value, len)) | |
474 | return -EFAULT; | |
1da177e4 | 475 | |
8e48aec7 DM |
476 | return 0; |
477 | } | |
1da177e4 | 478 | |
8e48aec7 DM |
479 | static int opiocset(void __user *argp, DATA *data) |
480 | { | |
481 | struct opiocdesc op; | |
482 | struct device_node *dp; | |
483 | char *str, *tmp; | |
484 | int err; | |
1da177e4 | 485 | |
8e48aec7 DM |
486 | if (copy_from_user(&op, argp, sizeof(op))) |
487 | return -EFAULT; | |
488 | ||
489 | dp = get_node(op.op_nodeid, data); | |
490 | if (!dp) | |
491 | return -EINVAL; | |
1da177e4 | 492 | |
8e48aec7 DM |
493 | err = copyin_string(op.op_name, op.op_namelen, &str); |
494 | if (err) | |
495 | return err; | |
1da177e4 | 496 | |
8e48aec7 DM |
497 | err = copyin_string(op.op_buf, op.op_buflen, &tmp); |
498 | if (err) { | |
1da177e4 | 499 | kfree(str); |
8e48aec7 DM |
500 | return err; |
501 | } | |
1da177e4 | 502 | |
8e48aec7 | 503 | err = of_set_property(dp, str, tmp, op.op_buflen); |
1da177e4 | 504 | |
8e48aec7 DM |
505 | kfree(str); |
506 | kfree(tmp); | |
1da177e4 | 507 | |
8e48aec7 DM |
508 | return err; |
509 | } | |
1da177e4 | 510 | |
8e48aec7 DM |
511 | static int opiocgetnext(unsigned int cmd, void __user *argp) |
512 | { | |
513 | struct device_node *dp; | |
514 | phandle nd; | |
1da177e4 | 515 | |
8e48aec7 | 516 | BUILD_BUG_ON(sizeof(phandle) != sizeof(int)); |
1da177e4 | 517 | |
8e48aec7 DM |
518 | if (copy_from_user(&nd, argp, sizeof(phandle))) |
519 | return -EFAULT; | |
1da177e4 | 520 | |
8e48aec7 DM |
521 | if (nd == 0) { |
522 | if (cmd != OPIOCGETNEXT) | |
1da177e4 | 523 | return -EINVAL; |
8e48aec7 DM |
524 | dp = of_find_node_by_path("/"); |
525 | } else { | |
526 | dp = of_find_node_by_phandle(nd); | |
527 | nd = 0; | |
528 | if (dp) { | |
529 | if (cmd == OPIOCGETNEXT) | |
530 | dp = dp->sibling; | |
531 | else | |
532 | dp = dp->child; | |
533 | } | |
534 | } | |
535 | if (dp) | |
536 | nd = dp->node; | |
537 | if (copy_to_user(argp, &nd, sizeof(phandle))) | |
538 | return -EFAULT; | |
1da177e4 | 539 | |
8e48aec7 DM |
540 | return 0; |
541 | } | |
1da177e4 | 542 | |
8e48aec7 DM |
543 | static int openprom_bsd_ioctl(struct inode * inode, struct file * file, |
544 | unsigned int cmd, unsigned long arg) | |
545 | { | |
546 | DATA *data = (DATA *) file->private_data; | |
547 | void __user *argp = (void __user *)arg; | |
548 | int err; | |
1da177e4 | 549 | |
8e48aec7 DM |
550 | switch (cmd) { |
551 | case OPIOCGET: | |
552 | err = opiocget(argp, data); | |
553 | break; | |
1da177e4 | 554 | |
8e48aec7 DM |
555 | case OPIOCNEXTPROP: |
556 | err = opiocnextprop(argp, data); | |
557 | break; | |
1da177e4 | 558 | |
8e48aec7 DM |
559 | case OPIOCSET: |
560 | err = opiocset(argp, data); | |
561 | break; | |
562 | ||
563 | case OPIOCGETOPTNODE: | |
564 | BUILD_BUG_ON(sizeof(phandle) != sizeof(int)); | |
1da177e4 | 565 | |
8e48aec7 | 566 | if (copy_to_user(argp, &options_node->node, sizeof(phandle))) |
1da177e4 LT |
567 | return -EFAULT; |
568 | ||
569 | return 0; | |
570 | ||
8e48aec7 DM |
571 | case OPIOCGETNEXT: |
572 | case OPIOCGETCHILD: | |
573 | err = opiocgetnext(cmd, argp); | |
574 | break; | |
575 | ||
1da177e4 | 576 | default: |
1da177e4 LT |
577 | return -EINVAL; |
578 | ||
8e48aec7 DM |
579 | }; |
580 | ||
581 | return err; | |
1da177e4 LT |
582 | } |
583 | ||
584 | ||
585 | /* | |
586 | * Handoff control to the correct ioctl handler. | |
587 | */ | |
588 | static int openprom_ioctl(struct inode * inode, struct file * file, | |
589 | unsigned int cmd, unsigned long arg) | |
590 | { | |
591 | DATA *data = (DATA *) file->private_data; | |
1da177e4 LT |
592 | |
593 | switch (cmd) { | |
594 | case OPROMGETOPT: | |
595 | case OPROMNXTOPT: | |
596 | if ((file->f_mode & FMODE_READ) == 0) | |
597 | return -EPERM; | |
598 | return openprom_sunos_ioctl(inode, file, cmd, arg, | |
599 | options_node); | |
600 | ||
601 | case OPROMSETOPT: | |
602 | case OPROMSETOPT2: | |
603 | if ((file->f_mode & FMODE_WRITE) == 0) | |
604 | return -EPERM; | |
605 | return openprom_sunos_ioctl(inode, file, cmd, arg, | |
606 | options_node); | |
607 | ||
608 | case OPROMNEXT: | |
609 | case OPROMCHILD: | |
610 | case OPROMGETPROP: | |
611 | case OPROMNXTPROP: | |
612 | if ((file->f_mode & FMODE_READ) == 0) | |
613 | return -EPERM; | |
614 | return openprom_sunos_ioctl(inode, file, cmd, arg, | |
615 | data->current_node); | |
616 | ||
617 | case OPROMU2P: | |
618 | case OPROMGETCONS: | |
619 | case OPROMGETFBNAME: | |
620 | case OPROMGETBOOTARGS: | |
621 | case OPROMSETCUR: | |
622 | case OPROMPCI2NODE: | |
623 | case OPROMPATH2NODE: | |
624 | if ((file->f_mode & FMODE_READ) == 0) | |
625 | return -EPERM; | |
626 | return openprom_sunos_ioctl(inode, file, cmd, arg, 0); | |
627 | ||
628 | case OPIOCGET: | |
629 | case OPIOCNEXTPROP: | |
630 | case OPIOCGETOPTNODE: | |
631 | case OPIOCGETNEXT: | |
632 | case OPIOCGETCHILD: | |
633 | if ((file->f_mode & FMODE_READ) == 0) | |
634 | return -EBADF; | |
635 | return openprom_bsd_ioctl(inode,file,cmd,arg); | |
636 | ||
637 | case OPIOCSET: | |
638 | if ((file->f_mode & FMODE_WRITE) == 0) | |
639 | return -EBADF; | |
640 | return openprom_bsd_ioctl(inode,file,cmd,arg); | |
641 | ||
642 | default: | |
1da177e4 | 643 | return -EINVAL; |
8e48aec7 | 644 | }; |
1da177e4 LT |
645 | } |
646 | ||
b31023fc CH |
647 | static long openprom_compat_ioctl(struct file *file, unsigned int cmd, |
648 | unsigned long arg) | |
649 | { | |
650 | long rval = -ENOTTY; | |
651 | ||
652 | /* | |
653 | * SunOS/Solaris only, the NetBSD one's have embedded pointers in | |
654 | * the arg which we'd need to clean up... | |
655 | */ | |
656 | switch (cmd) { | |
657 | case OPROMGETOPT: | |
658 | case OPROMSETOPT: | |
659 | case OPROMNXTOPT: | |
660 | case OPROMSETOPT2: | |
661 | case OPROMNEXT: | |
662 | case OPROMCHILD: | |
663 | case OPROMGETPROP: | |
664 | case OPROMNXTPROP: | |
665 | case OPROMU2P: | |
666 | case OPROMGETCONS: | |
667 | case OPROMGETFBNAME: | |
668 | case OPROMGETBOOTARGS: | |
669 | case OPROMSETCUR: | |
670 | case OPROMPCI2NODE: | |
671 | case OPROMPATH2NODE: | |
b31023fc | 672 | rval = openprom_ioctl(file->f_dentry->d_inode, file, cmd, arg); |
b31023fc CH |
673 | break; |
674 | } | |
d5a858bc DM |
675 | |
676 | return rval; | |
b31023fc CH |
677 | } |
678 | ||
1da177e4 LT |
679 | static int openprom_open(struct inode * inode, struct file * file) |
680 | { | |
681 | DATA *data; | |
682 | ||
8e48aec7 | 683 | data = kmalloc(sizeof(DATA), GFP_KERNEL); |
1da177e4 LT |
684 | if (!data) |
685 | return -ENOMEM; | |
686 | ||
8e48aec7 DM |
687 | data->current_node = of_find_node_by_path("/"); |
688 | data->lastnode = data->current_node; | |
689 | file->private_data = (void *) data; | |
1da177e4 LT |
690 | |
691 | return 0; | |
692 | } | |
693 | ||
694 | static int openprom_release(struct inode * inode, struct file * file) | |
695 | { | |
696 | kfree(file->private_data); | |
697 | return 0; | |
698 | } | |
699 | ||
700 | static struct file_operations openprom_fops = { | |
701 | .owner = THIS_MODULE, | |
702 | .llseek = no_llseek, | |
703 | .ioctl = openprom_ioctl, | |
d5a858bc | 704 | .compat_ioctl = openprom_compat_ioctl, |
1da177e4 LT |
705 | .open = openprom_open, |
706 | .release = openprom_release, | |
707 | }; | |
708 | ||
709 | static struct miscdevice openprom_dev = { | |
8e48aec7 DM |
710 | .minor = SUN_OPENPROM_MINOR, |
711 | .name = "openprom", | |
712 | .fops = &openprom_fops, | |
1da177e4 LT |
713 | }; |
714 | ||
715 | static int __init openprom_init(void) | |
716 | { | |
8e48aec7 DM |
717 | struct device_node *dp; |
718 | int err; | |
1da177e4 | 719 | |
8e48aec7 DM |
720 | err = misc_register(&openprom_dev); |
721 | if (err) | |
722 | return err; | |
1da177e4 | 723 | |
8e48aec7 DM |
724 | dp = of_find_node_by_path("/"); |
725 | dp = dp->child; | |
726 | while (dp) { | |
727 | if (!strcmp(dp->name, "options")) | |
728 | break; | |
729 | dp = dp->sibling; | |
730 | } | |
731 | options_node = dp; | |
1da177e4 | 732 | |
8e48aec7 | 733 | if (!options_node) { |
1da177e4 LT |
734 | misc_deregister(&openprom_dev); |
735 | return -EIO; | |
736 | } | |
737 | ||
738 | return 0; | |
739 | } | |
740 | ||
741 | static void __exit openprom_cleanup(void) | |
742 | { | |
743 | misc_deregister(&openprom_dev); | |
744 | } | |
745 | ||
746 | module_init(openprom_init); | |
747 | module_exit(openprom_cleanup); |