Commit | Line | Data |
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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> | |
1da177e4 LT |
34 | #include <linux/errno.h> |
35 | #include <linux/slab.h> | |
36 | #include <linux/string.h> | |
37 | #include <linux/miscdevice.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/fs.h> | |
40 | #include <asm/oplib.h> | |
8e48aec7 | 41 | #include <asm/prom.h> |
1da177e4 LT |
42 | #include <asm/system.h> |
43 | #include <asm/uaccess.h> | |
44 | #include <asm/openpromio.h> | |
45 | #ifdef CONFIG_PCI | |
46 | #include <linux/pci.h> | |
47 | #include <asm/pbm.h> | |
48 | #endif | |
49 | ||
8e48aec7 DM |
50 | MODULE_AUTHOR("Thomas K. Dyas (tdyas@noc.rutgers.edu) and Eddie C. Dost (ecd@skynet.be)"); |
51 | MODULE_DESCRIPTION("OPENPROM Configuration Driver"); | |
52 | MODULE_LICENSE("GPL"); | |
53 | MODULE_VERSION("1.0"); | |
54 | ||
1da177e4 LT |
55 | /* Private data kept by the driver for each descriptor. */ |
56 | typedef struct openprom_private_data | |
57 | { | |
8e48aec7 DM |
58 | struct device_node *current_node; /* Current node for SunOS ioctls. */ |
59 | struct device_node *lastnode; /* Last valid node used by BSD ioctls. */ | |
1da177e4 LT |
60 | } DATA; |
61 | ||
62 | /* ID of the PROM node containing all of the EEPROM options. */ | |
8e48aec7 | 63 | static struct device_node *options_node; |
1da177e4 LT |
64 | |
65 | /* | |
66 | * Copy an openpromio structure into kernel space from user space. | |
67 | * This routine does error checking to make sure that all memory | |
68 | * accesses are within bounds. A pointer to the allocated openpromio | |
69 | * structure will be placed in "*opp_p". Return value is the length | |
70 | * of the user supplied buffer. | |
71 | */ | |
72 | static int copyin(struct openpromio __user *info, struct openpromio **opp_p) | |
73 | { | |
74 | unsigned int bufsize; | |
75 | ||
76 | if (!info || !opp_p) | |
77 | return -EFAULT; | |
78 | ||
79 | if (get_user(bufsize, &info->oprom_size)) | |
80 | return -EFAULT; | |
81 | ||
82 | if (bufsize == 0) | |
83 | return -EINVAL; | |
84 | ||
85 | /* If the bufsize is too large, just limit it. | |
86 | * Fix from Jason Rappleye. | |
87 | */ | |
88 | if (bufsize > OPROMMAXPARAM) | |
89 | bufsize = OPROMMAXPARAM; | |
90 | ||
8e48aec7 | 91 | if (!(*opp_p = kzalloc(sizeof(int) + bufsize + 1, GFP_KERNEL))) |
1da177e4 | 92 | return -ENOMEM; |
1da177e4 LT |
93 | |
94 | if (copy_from_user(&(*opp_p)->oprom_array, | |
95 | &info->oprom_array, bufsize)) { | |
96 | kfree(*opp_p); | |
97 | return -EFAULT; | |
98 | } | |
99 | return bufsize; | |
100 | } | |
101 | ||
102 | static int getstrings(struct openpromio __user *info, struct openpromio **opp_p) | |
103 | { | |
104 | int n, bufsize; | |
105 | char c; | |
106 | ||
107 | if (!info || !opp_p) | |
108 | return -EFAULT; | |
109 | ||
8e48aec7 | 110 | if (!(*opp_p = kzalloc(sizeof(int) + OPROMMAXPARAM + 1, GFP_KERNEL))) |
1da177e4 LT |
111 | return -ENOMEM; |
112 | ||
1da177e4 LT |
113 | (*opp_p)->oprom_size = 0; |
114 | ||
115 | n = bufsize = 0; | |
116 | while ((n < 2) && (bufsize < OPROMMAXPARAM)) { | |
117 | if (get_user(c, &info->oprom_array[bufsize])) { | |
118 | kfree(*opp_p); | |
119 | return -EFAULT; | |
120 | } | |
121 | if (c == '\0') | |
122 | n++; | |
123 | (*opp_p)->oprom_array[bufsize++] = c; | |
124 | } | |
125 | if (!n) { | |
126 | kfree(*opp_p); | |
127 | return -EINVAL; | |
128 | } | |
129 | return bufsize; | |
130 | } | |
131 | ||
132 | /* | |
133 | * Copy an openpromio structure in kernel space back to user space. | |
134 | */ | |
135 | static int copyout(void __user *info, struct openpromio *opp, int len) | |
136 | { | |
137 | if (copy_to_user(info, opp, len)) | |
138 | return -EFAULT; | |
139 | return 0; | |
140 | } | |
141 | ||
8e48aec7 DM |
142 | static int opromgetprop(void __user *argp, struct device_node *dp, struct openpromio *op, int bufsize) |
143 | { | |
144 | void *pval; | |
145 | int len; | |
146 | ||
b9b64e6e DM |
147 | if (!dp || |
148 | !(pval = of_get_property(dp, op->oprom_array, &len)) || | |
149 | len <= 0 || len > bufsize) | |
8e48aec7 DM |
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 | ||
b9b64e6e DM |
164 | if (!dp) |
165 | return copyout(argp, op, sizeof(int)); | |
8e48aec7 DM |
166 | if (op->oprom_array[0] == '\0') { |
167 | prop = dp->properties; | |
168 | if (!prop) | |
169 | return copyout(argp, op, sizeof(int)); | |
170 | len = strlen(prop->name); | |
171 | } else { | |
172 | prop = of_find_property(dp, op->oprom_array, NULL); | |
173 | ||
174 | if (!prop || | |
175 | !prop->next || | |
176 | (len = strlen(prop->next->name)) + 1 > bufsize) | |
177 | return copyout(argp, op, sizeof(int)); | |
178 | ||
179 | prop = prop->next; | |
180 | } | |
181 | ||
182 | memcpy(op->oprom_array, prop->name, len); | |
183 | op->oprom_array[len] = '\0'; | |
184 | op->oprom_size = ++len; | |
185 | ||
186 | return copyout(argp, op, sizeof(int) + bufsize); | |
187 | } | |
188 | ||
189 | static int opromsetopt(struct device_node *dp, struct openpromio *op, int bufsize) | |
190 | { | |
191 | char *buf = op->oprom_array + strlen(op->oprom_array) + 1; | |
192 | int len = op->oprom_array + bufsize - buf; | |
193 | ||
194 | return of_set_property(options_node, op->oprom_array, buf, len); | |
195 | } | |
196 | ||
197 | static int opromnext(void __user *argp, unsigned int cmd, struct device_node *dp, struct openpromio *op, int bufsize, DATA *data) | |
198 | { | |
199 | phandle ph; | |
200 | ||
201 | BUILD_BUG_ON(sizeof(phandle) != sizeof(int)); | |
202 | ||
203 | if (bufsize < sizeof(phandle)) | |
204 | return -EINVAL; | |
205 | ||
206 | ph = *((int *) op->oprom_array); | |
207 | if (ph) { | |
208 | dp = of_find_node_by_phandle(ph); | |
209 | if (!dp) | |
210 | return -EINVAL; | |
211 | ||
212 | switch (cmd) { | |
213 | case OPROMNEXT: | |
214 | dp = dp->sibling; | |
215 | break; | |
216 | ||
217 | case OPROMCHILD: | |
218 | dp = dp->child; | |
219 | break; | |
220 | ||
221 | case OPROMSETCUR: | |
222 | default: | |
223 | break; | |
224 | }; | |
225 | } else { | |
226 | /* Sibling of node zero is the root node. */ | |
227 | if (cmd != OPROMNEXT) | |
228 | return -EINVAL; | |
229 | ||
230 | dp = of_find_node_by_path("/"); | |
231 | } | |
232 | ||
233 | ph = 0; | |
234 | if (dp) | |
235 | ph = dp->node; | |
236 | ||
237 | data->current_node = dp; | |
238 | *((int *) op->oprom_array) = ph; | |
239 | op->oprom_size = sizeof(phandle); | |
240 | ||
241 | return copyout(argp, op, bufsize + sizeof(int)); | |
242 | } | |
243 | ||
244 | static int oprompci2node(void __user *argp, struct device_node *dp, struct openpromio *op, int bufsize, DATA *data) | |
245 | { | |
246 | int err = -EINVAL; | |
247 | ||
248 | if (bufsize >= 2*sizeof(int)) { | |
249 | #ifdef CONFIG_PCI | |
250 | struct pci_dev *pdev; | |
251 | struct pcidev_cookie *pcp; | |
7e9f3346 | 252 | pdev = pci_get_bus_and_slot (((int *) op->oprom_array)[0], |
8e48aec7 DM |
253 | ((int *) op->oprom_array)[1]); |
254 | ||
255 | pcp = pdev->sysdata; | |
256 | if (pcp != NULL) { | |
257 | dp = pcp->prom_node; | |
258 | data->current_node = dp; | |
259 | *((int *)op->oprom_array) = dp->node; | |
260 | op->oprom_size = sizeof(int); | |
261 | err = copyout(argp, op, bufsize + sizeof(int)); | |
262 | } | |
7e9f3346 | 263 | pci_dev_put(pdev); |
8e48aec7 DM |
264 | #endif |
265 | } | |
266 | ||
267 | return err; | |
268 | } | |
269 | ||
270 | static int oprompath2node(void __user *argp, struct device_node *dp, struct openpromio *op, int bufsize, DATA *data) | |
271 | { | |
b9b64e6e DM |
272 | phandle ph = 0; |
273 | ||
8e48aec7 | 274 | dp = of_find_node_by_path(op->oprom_array); |
b9b64e6e DM |
275 | if (dp) |
276 | ph = dp->node; | |
8e48aec7 | 277 | data->current_node = dp; |
b9b64e6e | 278 | *((int *)op->oprom_array) = ph; |
8e48aec7 DM |
279 | op->oprom_size = sizeof(int); |
280 | ||
281 | return copyout(argp, op, bufsize + sizeof(int)); | |
282 | } | |
283 | ||
284 | static int opromgetbootargs(void __user *argp, struct openpromio *op, int bufsize) | |
285 | { | |
286 | char *buf = saved_command_line; | |
287 | int len = strlen(buf); | |
288 | ||
289 | if (len > bufsize) | |
290 | return -EINVAL; | |
291 | ||
292 | strcpy(op->oprom_array, buf); | |
293 | op->oprom_size = len; | |
294 | ||
295 | return copyout(argp, op, bufsize + sizeof(int)); | |
296 | } | |
297 | ||
1da177e4 LT |
298 | /* |
299 | * SunOS and Solaris /dev/openprom ioctl calls. | |
300 | */ | |
301 | static int openprom_sunos_ioctl(struct inode * inode, struct file * file, | |
8e48aec7 DM |
302 | unsigned int cmd, unsigned long arg, |
303 | struct device_node *dp) | |
1da177e4 | 304 | { |
8e48aec7 | 305 | DATA *data = file->private_data; |
1da177e4 | 306 | struct openpromio *opp; |
8e48aec7 | 307 | int bufsize, error = 0; |
1da177e4 LT |
308 | static int cnt; |
309 | void __user *argp = (void __user *)arg; | |
310 | ||
311 | if (cmd == OPROMSETOPT) | |
312 | bufsize = getstrings(argp, &opp); | |
313 | else | |
314 | bufsize = copyin(argp, &opp); | |
315 | ||
316 | if (bufsize < 0) | |
317 | return bufsize; | |
318 | ||
319 | switch (cmd) { | |
320 | case OPROMGETOPT: | |
321 | case OPROMGETPROP: | |
8e48aec7 | 322 | error = opromgetprop(argp, dp, opp, bufsize); |
1da177e4 LT |
323 | break; |
324 | ||
325 | case OPROMNXTOPT: | |
326 | case OPROMNXTPROP: | |
8e48aec7 | 327 | error = opromnxtprop(argp, dp, opp, bufsize); |
1da177e4 LT |
328 | break; |
329 | ||
330 | case OPROMSETOPT: | |
331 | case OPROMSETOPT2: | |
8e48aec7 | 332 | error = opromsetopt(dp, opp, bufsize); |
1da177e4 LT |
333 | break; |
334 | ||
335 | case OPROMNEXT: | |
336 | case OPROMCHILD: | |
337 | case OPROMSETCUR: | |
8e48aec7 | 338 | error = opromnext(argp, cmd, dp, opp, bufsize, data); |
1da177e4 LT |
339 | break; |
340 | ||
341 | case OPROMPCI2NODE: | |
8e48aec7 | 342 | error = oprompci2node(argp, dp, opp, bufsize, data); |
1da177e4 LT |
343 | break; |
344 | ||
345 | case OPROMPATH2NODE: | |
8e48aec7 | 346 | error = oprompath2node(argp, dp, opp, bufsize, data); |
1da177e4 LT |
347 | break; |
348 | ||
349 | case OPROMGETBOOTARGS: | |
8e48aec7 | 350 | error = opromgetbootargs(argp, opp, bufsize); |
1da177e4 LT |
351 | break; |
352 | ||
353 | case OPROMU2P: | |
354 | case OPROMGETCONS: | |
355 | case OPROMGETFBNAME: | |
356 | if (cnt++ < 10) | |
357 | printk(KERN_INFO "openprom_sunos_ioctl: unimplemented ioctl\n"); | |
358 | error = -EINVAL; | |
359 | break; | |
360 | default: | |
361 | if (cnt++ < 10) | |
362 | printk(KERN_INFO "openprom_sunos_ioctl: cmd 0x%X, arg 0x%lX\n", cmd, arg); | |
363 | error = -EINVAL; | |
364 | break; | |
365 | } | |
366 | ||
367 | kfree(opp); | |
368 | return error; | |
369 | } | |
370 | ||
8e48aec7 | 371 | static struct device_node *get_node(phandle n, DATA *data) |
1da177e4 | 372 | { |
8e48aec7 | 373 | struct device_node *dp = of_find_node_by_phandle(n); |
1da177e4 | 374 | |
8e48aec7 DM |
375 | if (dp) |
376 | data->lastnode = dp; | |
377 | ||
378 | return dp; | |
1da177e4 LT |
379 | } |
380 | ||
381 | /* Copy in a whole string from userspace into kernelspace. */ | |
382 | static int copyin_string(char __user *user, size_t len, char **ptr) | |
383 | { | |
384 | char *tmp; | |
385 | ||
386 | if ((ssize_t)len < 0 || (ssize_t)(len + 1) < 0) | |
387 | return -EINVAL; | |
388 | ||
389 | tmp = kmalloc(len + 1, GFP_KERNEL); | |
390 | if (!tmp) | |
391 | return -ENOMEM; | |
392 | ||
8e48aec7 | 393 | if (copy_from_user(tmp, user, len)) { |
1da177e4 LT |
394 | kfree(tmp); |
395 | return -EFAULT; | |
396 | } | |
397 | ||
398 | tmp[len] = '\0'; | |
399 | ||
400 | *ptr = tmp; | |
401 | ||
402 | return 0; | |
403 | } | |
404 | ||
405 | /* | |
406 | * NetBSD /dev/openprom ioctl calls. | |
407 | */ | |
8e48aec7 | 408 | static int opiocget(void __user *argp, DATA *data) |
1da177e4 | 409 | { |
1da177e4 | 410 | struct opiocdesc op; |
8e48aec7 DM |
411 | struct device_node *dp; |
412 | char *str; | |
413 | void *pval; | |
414 | int err, len; | |
1da177e4 | 415 | |
8e48aec7 DM |
416 | if (copy_from_user(&op, argp, sizeof(op))) |
417 | return -EFAULT; | |
1da177e4 | 418 | |
8e48aec7 | 419 | dp = get_node(op.op_nodeid, data); |
1da177e4 | 420 | |
8e48aec7 DM |
421 | err = copyin_string(op.op_name, op.op_namelen, &str); |
422 | if (err) | |
423 | return err; | |
1da177e4 | 424 | |
8e48aec7 DM |
425 | pval = of_get_property(dp, str, &len); |
426 | err = 0; | |
427 | if (!pval || len > op.op_buflen) { | |
428 | err = -EINVAL; | |
429 | } else { | |
1da177e4 | 430 | op.op_buflen = len; |
8e48aec7 DM |
431 | if (copy_to_user(argp, &op, sizeof(op)) || |
432 | copy_to_user(op.op_buf, pval, len)) | |
433 | err = -EFAULT; | |
434 | } | |
435 | kfree(str); | |
1da177e4 | 436 | |
8e48aec7 DM |
437 | return err; |
438 | } | |
1da177e4 | 439 | |
8e48aec7 DM |
440 | static int opiocnextprop(void __user *argp, DATA *data) |
441 | { | |
442 | struct opiocdesc op; | |
443 | struct device_node *dp; | |
444 | struct property *prop; | |
445 | char *str; | |
446 | int err, len; | |
1da177e4 | 447 | |
8e48aec7 DM |
448 | if (copy_from_user(&op, argp, sizeof(op))) |
449 | return -EFAULT; | |
1da177e4 | 450 | |
8e48aec7 DM |
451 | dp = get_node(op.op_nodeid, data); |
452 | if (!dp) | |
453 | return -EINVAL; | |
1da177e4 | 454 | |
8e48aec7 DM |
455 | err = copyin_string(op.op_name, op.op_namelen, &str); |
456 | if (err) | |
457 | return err; | |
1da177e4 | 458 | |
8e48aec7 DM |
459 | if (str[0] == '\0') { |
460 | prop = dp->properties; | |
461 | } else { | |
462 | prop = of_find_property(dp, str, NULL); | |
463 | if (prop) | |
464 | prop = prop->next; | |
465 | } | |
466 | kfree(str); | |
1da177e4 | 467 | |
8e48aec7 DM |
468 | if (!prop) |
469 | len = 0; | |
470 | else | |
471 | len = prop->length; | |
1da177e4 | 472 | |
8e48aec7 DM |
473 | if (len > op.op_buflen) |
474 | len = op.op_buflen; | |
1da177e4 | 475 | |
8e48aec7 DM |
476 | if (copy_to_user(argp, &op, sizeof(op))) |
477 | return -EFAULT; | |
1da177e4 | 478 | |
8e48aec7 DM |
479 | if (len && |
480 | copy_to_user(op.op_buf, prop->value, len)) | |
481 | return -EFAULT; | |
1da177e4 | 482 | |
8e48aec7 DM |
483 | return 0; |
484 | } | |
1da177e4 | 485 | |
8e48aec7 DM |
486 | static int opiocset(void __user *argp, DATA *data) |
487 | { | |
488 | struct opiocdesc op; | |
489 | struct device_node *dp; | |
490 | char *str, *tmp; | |
491 | int err; | |
1da177e4 | 492 | |
8e48aec7 DM |
493 | if (copy_from_user(&op, argp, sizeof(op))) |
494 | return -EFAULT; | |
495 | ||
496 | dp = get_node(op.op_nodeid, data); | |
497 | if (!dp) | |
498 | return -EINVAL; | |
1da177e4 | 499 | |
8e48aec7 DM |
500 | err = copyin_string(op.op_name, op.op_namelen, &str); |
501 | if (err) | |
502 | return err; | |
1da177e4 | 503 | |
8e48aec7 DM |
504 | err = copyin_string(op.op_buf, op.op_buflen, &tmp); |
505 | if (err) { | |
1da177e4 | 506 | kfree(str); |
8e48aec7 DM |
507 | return err; |
508 | } | |
1da177e4 | 509 | |
8e48aec7 | 510 | err = of_set_property(dp, str, tmp, op.op_buflen); |
1da177e4 | 511 | |
8e48aec7 DM |
512 | kfree(str); |
513 | kfree(tmp); | |
1da177e4 | 514 | |
8e48aec7 DM |
515 | return err; |
516 | } | |
1da177e4 | 517 | |
8e48aec7 DM |
518 | static int opiocgetnext(unsigned int cmd, void __user *argp) |
519 | { | |
520 | struct device_node *dp; | |
521 | phandle nd; | |
1da177e4 | 522 | |
8e48aec7 | 523 | BUILD_BUG_ON(sizeof(phandle) != sizeof(int)); |
1da177e4 | 524 | |
8e48aec7 DM |
525 | if (copy_from_user(&nd, argp, sizeof(phandle))) |
526 | return -EFAULT; | |
1da177e4 | 527 | |
8e48aec7 DM |
528 | if (nd == 0) { |
529 | if (cmd != OPIOCGETNEXT) | |
1da177e4 | 530 | return -EINVAL; |
8e48aec7 DM |
531 | dp = of_find_node_by_path("/"); |
532 | } else { | |
533 | dp = of_find_node_by_phandle(nd); | |
534 | nd = 0; | |
535 | if (dp) { | |
536 | if (cmd == OPIOCGETNEXT) | |
537 | dp = dp->sibling; | |
538 | else | |
539 | dp = dp->child; | |
540 | } | |
541 | } | |
542 | if (dp) | |
543 | nd = dp->node; | |
544 | if (copy_to_user(argp, &nd, sizeof(phandle))) | |
545 | return -EFAULT; | |
1da177e4 | 546 | |
8e48aec7 DM |
547 | return 0; |
548 | } | |
1da177e4 | 549 | |
8e48aec7 DM |
550 | static int openprom_bsd_ioctl(struct inode * inode, struct file * file, |
551 | unsigned int cmd, unsigned long arg) | |
552 | { | |
553 | DATA *data = (DATA *) file->private_data; | |
554 | void __user *argp = (void __user *)arg; | |
555 | int err; | |
1da177e4 | 556 | |
8e48aec7 DM |
557 | switch (cmd) { |
558 | case OPIOCGET: | |
559 | err = opiocget(argp, data); | |
560 | break; | |
1da177e4 | 561 | |
8e48aec7 DM |
562 | case OPIOCNEXTPROP: |
563 | err = opiocnextprop(argp, data); | |
564 | break; | |
1da177e4 | 565 | |
8e48aec7 DM |
566 | case OPIOCSET: |
567 | err = opiocset(argp, data); | |
568 | break; | |
569 | ||
570 | case OPIOCGETOPTNODE: | |
571 | BUILD_BUG_ON(sizeof(phandle) != sizeof(int)); | |
1da177e4 | 572 | |
8e48aec7 | 573 | if (copy_to_user(argp, &options_node->node, sizeof(phandle))) |
1da177e4 LT |
574 | return -EFAULT; |
575 | ||
576 | return 0; | |
577 | ||
8e48aec7 DM |
578 | case OPIOCGETNEXT: |
579 | case OPIOCGETCHILD: | |
580 | err = opiocgetnext(cmd, argp); | |
581 | break; | |
582 | ||
1da177e4 | 583 | default: |
1da177e4 LT |
584 | return -EINVAL; |
585 | ||
8e48aec7 DM |
586 | }; |
587 | ||
588 | return err; | |
1da177e4 LT |
589 | } |
590 | ||
591 | ||
592 | /* | |
593 | * Handoff control to the correct ioctl handler. | |
594 | */ | |
595 | static int openprom_ioctl(struct inode * inode, struct file * file, | |
596 | unsigned int cmd, unsigned long arg) | |
597 | { | |
598 | DATA *data = (DATA *) file->private_data; | |
1da177e4 LT |
599 | |
600 | switch (cmd) { | |
601 | case OPROMGETOPT: | |
602 | case OPROMNXTOPT: | |
603 | if ((file->f_mode & FMODE_READ) == 0) | |
604 | return -EPERM; | |
605 | return openprom_sunos_ioctl(inode, file, cmd, arg, | |
606 | options_node); | |
607 | ||
608 | case OPROMSETOPT: | |
609 | case OPROMSETOPT2: | |
610 | if ((file->f_mode & FMODE_WRITE) == 0) | |
611 | return -EPERM; | |
612 | return openprom_sunos_ioctl(inode, file, cmd, arg, | |
613 | options_node); | |
614 | ||
615 | case OPROMNEXT: | |
616 | case OPROMCHILD: | |
617 | case OPROMGETPROP: | |
618 | case OPROMNXTPROP: | |
619 | if ((file->f_mode & FMODE_READ) == 0) | |
620 | return -EPERM; | |
621 | return openprom_sunos_ioctl(inode, file, cmd, arg, | |
622 | data->current_node); | |
623 | ||
624 | case OPROMU2P: | |
625 | case OPROMGETCONS: | |
626 | case OPROMGETFBNAME: | |
627 | case OPROMGETBOOTARGS: | |
628 | case OPROMSETCUR: | |
629 | case OPROMPCI2NODE: | |
630 | case OPROMPATH2NODE: | |
631 | if ((file->f_mode & FMODE_READ) == 0) | |
632 | return -EPERM; | |
a6ded1b0 | 633 | return openprom_sunos_ioctl(inode, file, cmd, arg, NULL); |
1da177e4 LT |
634 | |
635 | case OPIOCGET: | |
636 | case OPIOCNEXTPROP: | |
637 | case OPIOCGETOPTNODE: | |
638 | case OPIOCGETNEXT: | |
639 | case OPIOCGETCHILD: | |
640 | if ((file->f_mode & FMODE_READ) == 0) | |
641 | return -EBADF; | |
642 | return openprom_bsd_ioctl(inode,file,cmd,arg); | |
643 | ||
644 | case OPIOCSET: | |
645 | if ((file->f_mode & FMODE_WRITE) == 0) | |
646 | return -EBADF; | |
647 | return openprom_bsd_ioctl(inode,file,cmd,arg); | |
648 | ||
649 | default: | |
1da177e4 | 650 | return -EINVAL; |
8e48aec7 | 651 | }; |
1da177e4 LT |
652 | } |
653 | ||
b31023fc CH |
654 | static long openprom_compat_ioctl(struct file *file, unsigned int cmd, |
655 | unsigned long arg) | |
656 | { | |
657 | long rval = -ENOTTY; | |
658 | ||
659 | /* | |
660 | * SunOS/Solaris only, the NetBSD one's have embedded pointers in | |
661 | * the arg which we'd need to clean up... | |
662 | */ | |
663 | switch (cmd) { | |
664 | case OPROMGETOPT: | |
665 | case OPROMSETOPT: | |
666 | case OPROMNXTOPT: | |
667 | case OPROMSETOPT2: | |
668 | case OPROMNEXT: | |
669 | case OPROMCHILD: | |
670 | case OPROMGETPROP: | |
671 | case OPROMNXTPROP: | |
672 | case OPROMU2P: | |
673 | case OPROMGETCONS: | |
674 | case OPROMGETFBNAME: | |
675 | case OPROMGETBOOTARGS: | |
676 | case OPROMSETCUR: | |
677 | case OPROMPCI2NODE: | |
678 | case OPROMPATH2NODE: | |
7fa95f72 | 679 | rval = openprom_ioctl(file->f_path.dentry->d_inode, file, cmd, arg); |
b31023fc CH |
680 | break; |
681 | } | |
d5a858bc DM |
682 | |
683 | return rval; | |
b31023fc CH |
684 | } |
685 | ||
1da177e4 LT |
686 | static int openprom_open(struct inode * inode, struct file * file) |
687 | { | |
688 | DATA *data; | |
689 | ||
8e48aec7 | 690 | data = kmalloc(sizeof(DATA), GFP_KERNEL); |
1da177e4 LT |
691 | if (!data) |
692 | return -ENOMEM; | |
693 | ||
8e48aec7 DM |
694 | data->current_node = of_find_node_by_path("/"); |
695 | data->lastnode = data->current_node; | |
696 | file->private_data = (void *) data; | |
1da177e4 LT |
697 | |
698 | return 0; | |
699 | } | |
700 | ||
701 | static int openprom_release(struct inode * inode, struct file * file) | |
702 | { | |
703 | kfree(file->private_data); | |
704 | return 0; | |
705 | } | |
706 | ||
00977a59 | 707 | static const struct file_operations openprom_fops = { |
1da177e4 LT |
708 | .owner = THIS_MODULE, |
709 | .llseek = no_llseek, | |
710 | .ioctl = openprom_ioctl, | |
d5a858bc | 711 | .compat_ioctl = openprom_compat_ioctl, |
1da177e4 LT |
712 | .open = openprom_open, |
713 | .release = openprom_release, | |
714 | }; | |
715 | ||
716 | static struct miscdevice openprom_dev = { | |
8e48aec7 DM |
717 | .minor = SUN_OPENPROM_MINOR, |
718 | .name = "openprom", | |
719 | .fops = &openprom_fops, | |
1da177e4 LT |
720 | }; |
721 | ||
722 | static int __init openprom_init(void) | |
723 | { | |
8e48aec7 DM |
724 | struct device_node *dp; |
725 | int err; | |
1da177e4 | 726 | |
8e48aec7 DM |
727 | err = misc_register(&openprom_dev); |
728 | if (err) | |
729 | return err; | |
1da177e4 | 730 | |
8e48aec7 DM |
731 | dp = of_find_node_by_path("/"); |
732 | dp = dp->child; | |
733 | while (dp) { | |
734 | if (!strcmp(dp->name, "options")) | |
735 | break; | |
736 | dp = dp->sibling; | |
737 | } | |
738 | options_node = dp; | |
1da177e4 | 739 | |
8e48aec7 | 740 | if (!options_node) { |
1da177e4 LT |
741 | misc_deregister(&openprom_dev); |
742 | return -EIO; | |
743 | } | |
744 | ||
745 | return 0; | |
746 | } | |
747 | ||
748 | static void __exit openprom_cleanup(void) | |
749 | { | |
750 | misc_deregister(&openprom_dev); | |
751 | } | |
752 | ||
753 | module_init(openprom_init); | |
754 | module_exit(openprom_cleanup); |