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caff4cae IM |
1 | /* arch/arm/mach-msm/qdsp5/adsp_driver.c |
2 | * | |
3 | * Copyright (C) 2008 Google, Inc. | |
4 | * Author: Iliyan Malchev <ibm@android.com> | |
5 | * | |
6 | * This software is licensed under the terms of the GNU General Public | |
7 | * License version 2, as published by the Free Software Foundation, and | |
8 | * may be copied, distributed, and modified under those terms. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | */ | |
16 | ||
17 | #include <linux/cdev.h> | |
18 | #include <linux/fs.h> | |
19 | #include <linux/list.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/sched.h> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
caff4cae IM |
23 | #include <linux/uaccess.h> |
24 | ||
25 | #include "adsp.h" | |
26 | ||
27 | #include <linux/msm_adsp.h> | |
28 | #include <linux/android_pmem.h> | |
29 | ||
30 | struct adsp_pmem_region { | |
31 | struct hlist_node list; | |
32 | void *vaddr; | |
33 | unsigned long paddr; | |
34 | unsigned long kvaddr; | |
35 | unsigned long len; | |
36 | struct file *file; | |
37 | }; | |
38 | ||
39 | struct adsp_device { | |
40 | struct msm_adsp_module *module; | |
41 | ||
42 | spinlock_t event_queue_lock; | |
43 | wait_queue_head_t event_wait; | |
44 | struct list_head event_queue; | |
45 | int abort; | |
46 | ||
47 | const char *name; | |
48 | struct device *device; | |
49 | struct cdev cdev; | |
50 | }; | |
51 | ||
52 | static struct adsp_device *inode_to_device(struct inode *inode); | |
53 | ||
54 | #define __CONTAINS(r, v, l) ({ \ | |
55 | typeof(r) __r = r; \ | |
56 | typeof(v) __v = v; \ | |
57 | typeof(v) __e = __v + l; \ | |
58 | int res = __v >= __r->vaddr && \ | |
59 | __e <= __r->vaddr + __r->len; \ | |
60 | res; \ | |
61 | }) | |
62 | ||
63 | #define CONTAINS(r1, r2) ({ \ | |
64 | typeof(r2) __r2 = r2; \ | |
65 | __CONTAINS(r1, __r2->vaddr, __r2->len); \ | |
66 | }) | |
67 | ||
68 | #define IN_RANGE(r, v) ({ \ | |
69 | typeof(r) __r = r; \ | |
70 | typeof(v) __vv = v; \ | |
71 | int res = ((__vv >= __r->vaddr) && \ | |
72 | (__vv < (__r->vaddr + __r->len))); \ | |
73 | res; \ | |
74 | }) | |
75 | ||
76 | #define OVERLAPS(r1, r2) ({ \ | |
77 | typeof(r1) __r1 = r1; \ | |
78 | typeof(r2) __r2 = r2; \ | |
79 | typeof(__r2->vaddr) __v = __r2->vaddr; \ | |
80 | typeof(__v) __e = __v + __r2->len - 1; \ | |
81 | int res = (IN_RANGE(__r1, __v) || IN_RANGE(__r1, __e)); \ | |
82 | res; \ | |
83 | }) | |
84 | ||
85 | static int adsp_pmem_check(struct msm_adsp_module *module, | |
86 | void *vaddr, unsigned long len) | |
87 | { | |
88 | struct adsp_pmem_region *region_elt; | |
89 | struct hlist_node *node; | |
90 | struct adsp_pmem_region t = { .vaddr = vaddr, .len = len }; | |
91 | ||
92 | hlist_for_each_entry(region_elt, node, &module->pmem_regions, list) { | |
93 | if (CONTAINS(region_elt, &t) || CONTAINS(&t, region_elt) || | |
94 | OVERLAPS(region_elt, &t)) { | |
95 | printk(KERN_ERR "adsp: module %s:" | |
96 | " region (vaddr %p len %ld)" | |
97 | " clashes with registered region" | |
98 | " (vaddr %p paddr %p len %ld)\n", | |
99 | module->name, | |
100 | vaddr, len, | |
101 | region_elt->vaddr, | |
102 | (void *)region_elt->paddr, | |
103 | region_elt->len); | |
104 | return -EINVAL; | |
105 | } | |
106 | } | |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
111 | static int adsp_pmem_add(struct msm_adsp_module *module, | |
112 | struct adsp_pmem_info *info) | |
113 | { | |
114 | unsigned long paddr, kvaddr, len; | |
115 | struct file *file; | |
116 | struct adsp_pmem_region *region; | |
117 | int rc = -EINVAL; | |
118 | ||
119 | mutex_lock(&module->pmem_regions_lock); | |
120 | region = kmalloc(sizeof(*region), GFP_KERNEL); | |
121 | if (!region) { | |
122 | rc = -ENOMEM; | |
123 | goto end; | |
124 | } | |
125 | INIT_HLIST_NODE(®ion->list); | |
126 | if (get_pmem_file(info->fd, &paddr, &kvaddr, &len, &file)) { | |
127 | kfree(region); | |
128 | goto end; | |
129 | } | |
130 | ||
131 | rc = adsp_pmem_check(module, info->vaddr, len); | |
132 | if (rc < 0) { | |
133 | put_pmem_file(file); | |
134 | kfree(region); | |
135 | goto end; | |
136 | } | |
137 | ||
138 | region->vaddr = info->vaddr; | |
139 | region->paddr = paddr; | |
140 | region->kvaddr = kvaddr; | |
141 | region->len = len; | |
142 | region->file = file; | |
143 | ||
144 | hlist_add_head(®ion->list, &module->pmem_regions); | |
145 | end: | |
146 | mutex_unlock(&module->pmem_regions_lock); | |
147 | return rc; | |
148 | } | |
149 | ||
150 | static int adsp_pmem_lookup_vaddr(struct msm_adsp_module *module, void **addr, | |
151 | unsigned long len, struct adsp_pmem_region **region) | |
152 | { | |
153 | struct hlist_node *node; | |
154 | void *vaddr = *addr; | |
155 | struct adsp_pmem_region *region_elt; | |
156 | ||
157 | int match_count = 0; | |
158 | ||
159 | *region = NULL; | |
160 | ||
161 | /* returns physical address or zero */ | |
162 | hlist_for_each_entry(region_elt, node, &module->pmem_regions, list) { | |
163 | if (vaddr >= region_elt->vaddr && | |
164 | vaddr < region_elt->vaddr + region_elt->len && | |
165 | vaddr + len <= region_elt->vaddr + region_elt->len) { | |
166 | /* offset since we could pass vaddr inside a registerd | |
167 | * pmem buffer | |
168 | */ | |
169 | ||
170 | match_count++; | |
171 | if (!*region) | |
172 | *region = region_elt; | |
173 | } | |
174 | } | |
175 | ||
176 | if (match_count > 1) { | |
177 | printk(KERN_ERR "adsp: module %s: " | |
178 | "multiple hits for vaddr %p, len %ld\n", | |
179 | module->name, vaddr, len); | |
180 | hlist_for_each_entry(region_elt, node, | |
181 | &module->pmem_regions, list) { | |
182 | if (vaddr >= region_elt->vaddr && | |
183 | vaddr < region_elt->vaddr + region_elt->len && | |
184 | vaddr + len <= region_elt->vaddr + region_elt->len) | |
185 | printk(KERN_ERR "\t%p, %ld --> %p\n", | |
186 | region_elt->vaddr, | |
187 | region_elt->len, | |
188 | (void *)region_elt->paddr); | |
189 | } | |
190 | } | |
191 | ||
192 | return *region ? 0 : -1; | |
193 | } | |
194 | ||
195 | int adsp_pmem_fixup_kvaddr(struct msm_adsp_module *module, void **addr, | |
196 | unsigned long *kvaddr, unsigned long len) | |
197 | { | |
198 | struct adsp_pmem_region *region; | |
199 | void *vaddr = *addr; | |
200 | unsigned long *paddr = (unsigned long *)addr; | |
201 | int ret; | |
202 | ||
203 | ret = adsp_pmem_lookup_vaddr(module, addr, len, ®ion); | |
204 | if (ret) { | |
205 | printk(KERN_ERR "adsp: not patching %s (paddr & kvaddr)," | |
206 | " lookup (%p, %ld) failed\n", | |
207 | module->name, vaddr, len); | |
208 | return ret; | |
209 | } | |
210 | *paddr = region->paddr + (vaddr - region->vaddr); | |
211 | *kvaddr = region->kvaddr + (vaddr - region->vaddr); | |
212 | return 0; | |
213 | } | |
214 | ||
215 | int adsp_pmem_fixup(struct msm_adsp_module *module, void **addr, | |
216 | unsigned long len) | |
217 | { | |
218 | struct adsp_pmem_region *region; | |
219 | void *vaddr = *addr; | |
220 | unsigned long *paddr = (unsigned long *)addr; | |
221 | int ret; | |
222 | ||
223 | ret = adsp_pmem_lookup_vaddr(module, addr, len, ®ion); | |
224 | if (ret) { | |
225 | printk(KERN_ERR "adsp: not patching %s, lookup (%p, %ld) failed\n", | |
226 | module->name, vaddr, len); | |
227 | return ret; | |
228 | } | |
229 | ||
230 | *paddr = region->paddr + (vaddr - region->vaddr); | |
231 | return 0; | |
232 | } | |
233 | ||
234 | static int adsp_verify_cmd(struct msm_adsp_module *module, | |
235 | unsigned int queue_id, void *cmd_data, | |
236 | size_t cmd_size) | |
237 | { | |
238 | /* call the per module verifier */ | |
239 | if (module->verify_cmd) | |
240 | return module->verify_cmd(module, queue_id, cmd_data, | |
241 | cmd_size); | |
242 | else | |
243 | printk(KERN_INFO "adsp: no packet verifying function " | |
244 | "for task %s\n", module->name); | |
245 | return 0; | |
246 | } | |
247 | ||
248 | static long adsp_write_cmd(struct adsp_device *adev, void __user *arg) | |
249 | { | |
250 | struct adsp_command_t cmd; | |
251 | unsigned char buf[256]; | |
252 | void *cmd_data; | |
253 | long rc; | |
254 | ||
255 | if (copy_from_user(&cmd, (void __user *)arg, sizeof(cmd))) | |
256 | return -EFAULT; | |
257 | ||
258 | if (cmd.len > 256) { | |
259 | cmd_data = kmalloc(cmd.len, GFP_USER); | |
260 | if (!cmd_data) | |
261 | return -ENOMEM; | |
262 | } else { | |
263 | cmd_data = buf; | |
264 | } | |
265 | ||
266 | if (copy_from_user(cmd_data, (void __user *)(cmd.data), cmd.len)) { | |
267 | rc = -EFAULT; | |
268 | goto end; | |
269 | } | |
270 | ||
271 | mutex_lock(&adev->module->pmem_regions_lock); | |
272 | if (adsp_verify_cmd(adev->module, cmd.queue, cmd_data, cmd.len)) { | |
273 | printk(KERN_ERR "module %s: verify failed.\n", | |
274 | adev->module->name); | |
275 | rc = -EINVAL; | |
276 | goto end; | |
277 | } | |
278 | rc = msm_adsp_write(adev->module, cmd.queue, cmd_data, cmd.len); | |
279 | end: | |
280 | mutex_unlock(&adev->module->pmem_regions_lock); | |
281 | ||
282 | if (cmd.len > 256) | |
283 | kfree(cmd_data); | |
284 | ||
285 | return rc; | |
286 | } | |
287 | ||
288 | static int adsp_events_pending(struct adsp_device *adev) | |
289 | { | |
290 | unsigned long flags; | |
291 | int yes; | |
292 | spin_lock_irqsave(&adev->event_queue_lock, flags); | |
293 | yes = !list_empty(&adev->event_queue); | |
294 | spin_unlock_irqrestore(&adev->event_queue_lock, flags); | |
295 | return yes || adev->abort; | |
296 | } | |
297 | ||
298 | static int adsp_pmem_lookup_paddr(struct msm_adsp_module *module, void **addr, | |
299 | struct adsp_pmem_region **region) | |
300 | { | |
301 | struct hlist_node *node; | |
302 | unsigned long paddr = (unsigned long)(*addr); | |
303 | struct adsp_pmem_region *region_elt; | |
304 | ||
305 | hlist_for_each_entry(region_elt, node, &module->pmem_regions, list) { | |
306 | if (paddr >= region_elt->paddr && | |
307 | paddr < region_elt->paddr + region_elt->len) { | |
308 | *region = region_elt; | |
309 | return 0; | |
310 | } | |
311 | } | |
312 | return -1; | |
313 | } | |
314 | ||
315 | int adsp_pmem_paddr_fixup(struct msm_adsp_module *module, void **addr) | |
316 | { | |
317 | struct adsp_pmem_region *region; | |
318 | unsigned long paddr = (unsigned long)(*addr); | |
319 | unsigned long *vaddr = (unsigned long *)addr; | |
320 | int ret; | |
321 | ||
322 | ret = adsp_pmem_lookup_paddr(module, addr, ®ion); | |
323 | if (ret) { | |
324 | printk(KERN_ERR "adsp: not patching %s, paddr %p lookup failed\n", | |
325 | module->name, vaddr); | |
326 | return ret; | |
327 | } | |
328 | ||
329 | *vaddr = (unsigned long)region->vaddr + (paddr - region->paddr); | |
330 | return 0; | |
331 | } | |
332 | ||
333 | static int adsp_patch_event(struct msm_adsp_module *module, | |
334 | struct adsp_event *event) | |
335 | { | |
336 | /* call the per-module msg verifier */ | |
337 | if (module->patch_event) | |
338 | return module->patch_event(module, event); | |
339 | return 0; | |
340 | } | |
341 | ||
342 | static long adsp_get_event(struct adsp_device *adev, void __user *arg) | |
343 | { | |
344 | unsigned long flags; | |
345 | struct adsp_event *data = NULL; | |
346 | struct adsp_event_t evt; | |
347 | int timeout; | |
348 | long rc = 0; | |
349 | ||
350 | if (copy_from_user(&evt, arg, sizeof(struct adsp_event_t))) | |
351 | return -EFAULT; | |
352 | ||
353 | timeout = (int)evt.timeout_ms; | |
354 | ||
355 | if (timeout > 0) { | |
356 | rc = wait_event_interruptible_timeout( | |
357 | adev->event_wait, adsp_events_pending(adev), | |
358 | msecs_to_jiffies(timeout)); | |
359 | if (rc == 0) | |
360 | return -ETIMEDOUT; | |
361 | } else { | |
362 | rc = wait_event_interruptible( | |
363 | adev->event_wait, adsp_events_pending(adev)); | |
364 | } | |
365 | if (rc < 0) | |
366 | return rc; | |
367 | ||
368 | if (adev->abort) | |
369 | return -ENODEV; | |
370 | ||
371 | spin_lock_irqsave(&adev->event_queue_lock, flags); | |
372 | if (!list_empty(&adev->event_queue)) { | |
373 | data = list_first_entry(&adev->event_queue, | |
374 | struct adsp_event, list); | |
375 | list_del(&data->list); | |
376 | } | |
377 | spin_unlock_irqrestore(&adev->event_queue_lock, flags); | |
378 | ||
379 | if (!data) | |
380 | return -EAGAIN; | |
381 | ||
382 | /* DSP messages are type 0; they may contain physical addresses */ | |
383 | if (data->type == 0) | |
384 | adsp_patch_event(adev->module, data); | |
385 | ||
386 | /* map adsp_event --> adsp_event_t */ | |
387 | if (evt.len < data->size) { | |
388 | rc = -ETOOSMALL; | |
389 | goto end; | |
390 | } | |
391 | if (data->msg_id != EVENT_MSG_ID) { | |
392 | if (copy_to_user((void *)(evt.data), data->data.msg16, | |
393 | data->size)) { | |
394 | rc = -EFAULT; | |
395 | goto end; | |
396 | } | |
397 | } else { | |
398 | if (copy_to_user((void *)(evt.data), data->data.msg32, | |
399 | data->size)) { | |
400 | rc = -EFAULT; | |
401 | goto end; | |
402 | } | |
403 | } | |
404 | ||
405 | evt.type = data->type; /* 0 --> from aDSP, 1 --> from ARM9 */ | |
406 | evt.msg_id = data->msg_id; | |
407 | evt.flags = data->is16; | |
408 | evt.len = data->size; | |
409 | if (copy_to_user(arg, &evt, sizeof(evt))) | |
410 | rc = -EFAULT; | |
411 | end: | |
412 | kfree(data); | |
413 | return rc; | |
414 | } | |
415 | ||
416 | static long adsp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) | |
417 | { | |
418 | struct adsp_device *adev = filp->private_data; | |
419 | ||
420 | switch (cmd) { | |
421 | case ADSP_IOCTL_ENABLE: | |
422 | return msm_adsp_enable(adev->module); | |
423 | ||
424 | case ADSP_IOCTL_DISABLE: | |
425 | return msm_adsp_disable(adev->module); | |
426 | ||
427 | case ADSP_IOCTL_DISABLE_EVENT_RSP: | |
428 | return 0; | |
429 | ||
430 | case ADSP_IOCTL_DISABLE_ACK: | |
431 | pr_err("adsp: ADSP_IOCTL_DISABLE_ACK is not implemented.\n"); | |
432 | break; | |
433 | ||
434 | case ADSP_IOCTL_WRITE_COMMAND: | |
435 | return adsp_write_cmd(adev, (void __user *) arg); | |
436 | ||
437 | case ADSP_IOCTL_GET_EVENT: | |
438 | return adsp_get_event(adev, (void __user *) arg); | |
439 | ||
440 | case ADSP_IOCTL_SET_CLKRATE: { | |
441 | #if CONFIG_MSM_AMSS_VERSION==6350 | |
442 | unsigned long clk_rate; | |
443 | if (copy_from_user(&clk_rate, (void *) arg, sizeof(clk_rate))) | |
444 | return -EFAULT; | |
445 | return adsp_set_clkrate(adev->module, clk_rate); | |
446 | #endif | |
447 | } | |
448 | ||
449 | case ADSP_IOCTL_REGISTER_PMEM: { | |
450 | struct adsp_pmem_info info; | |
451 | if (copy_from_user(&info, (void *) arg, sizeof(info))) | |
452 | return -EFAULT; | |
453 | return adsp_pmem_add(adev->module, &info); | |
454 | } | |
455 | ||
456 | case ADSP_IOCTL_ABORT_EVENT_READ: | |
457 | adev->abort = 1; | |
458 | wake_up(&adev->event_wait); | |
459 | break; | |
460 | ||
461 | default: | |
462 | break; | |
463 | } | |
464 | return -EINVAL; | |
465 | } | |
466 | ||
467 | static int adsp_release(struct inode *inode, struct file *filp) | |
468 | { | |
469 | struct adsp_device *adev = filp->private_data; | |
470 | struct msm_adsp_module *module = adev->module; | |
471 | struct hlist_node *node, *tmp; | |
472 | struct adsp_pmem_region *region; | |
473 | ||
474 | pr_info("adsp_release() '%s'\n", adev->name); | |
475 | ||
476 | /* clear module before putting it to avoid race with open() */ | |
477 | adev->module = NULL; | |
478 | ||
479 | mutex_lock(&module->pmem_regions_lock); | |
480 | hlist_for_each_safe(node, tmp, &module->pmem_regions) { | |
481 | region = hlist_entry(node, struct adsp_pmem_region, list); | |
482 | hlist_del(node); | |
483 | put_pmem_file(region->file); | |
484 | kfree(region); | |
485 | } | |
486 | mutex_unlock(&module->pmem_regions_lock); | |
487 | BUG_ON(!hlist_empty(&module->pmem_regions)); | |
488 | ||
489 | msm_adsp_put(module); | |
490 | return 0; | |
491 | } | |
492 | ||
493 | static void adsp_event(void *driver_data, unsigned id, size_t len, | |
494 | void (*getevent)(void *ptr, size_t len)) | |
495 | { | |
496 | struct adsp_device *adev = driver_data; | |
497 | struct adsp_event *event; | |
498 | unsigned long flags; | |
499 | ||
500 | if (len > ADSP_EVENT_MAX_SIZE) { | |
501 | pr_err("adsp_event: event too large (%d bytes)\n", len); | |
502 | return; | |
503 | } | |
504 | ||
505 | event = kmalloc(sizeof(*event), GFP_ATOMIC); | |
506 | if (!event) { | |
507 | pr_err("adsp_event: cannot allocate buffer\n"); | |
508 | return; | |
509 | } | |
510 | ||
511 | if (id != EVENT_MSG_ID) { | |
512 | event->type = 0; | |
513 | event->is16 = 0; | |
514 | event->msg_id = id; | |
515 | event->size = len; | |
516 | ||
517 | getevent(event->data.msg16, len); | |
518 | } else { | |
519 | event->type = 1; | |
520 | event->is16 = 1; | |
521 | event->msg_id = id; | |
522 | event->size = len; | |
523 | getevent(event->data.msg32, len); | |
524 | } | |
525 | ||
526 | spin_lock_irqsave(&adev->event_queue_lock, flags); | |
527 | list_add_tail(&event->list, &adev->event_queue); | |
528 | spin_unlock_irqrestore(&adev->event_queue_lock, flags); | |
529 | wake_up(&adev->event_wait); | |
530 | } | |
531 | ||
532 | static struct msm_adsp_ops adsp_ops = { | |
533 | .event = adsp_event, | |
534 | }; | |
535 | ||
536 | static int adsp_open(struct inode *inode, struct file *filp) | |
537 | { | |
538 | struct adsp_device *adev; | |
539 | int rc; | |
540 | ||
541 | rc = nonseekable_open(inode, filp); | |
542 | if (rc < 0) | |
543 | return rc; | |
544 | ||
545 | adev = inode_to_device(inode); | |
546 | if (!adev) | |
547 | return -ENODEV; | |
548 | ||
549 | pr_info("adsp_open() name = '%s'\n", adev->name); | |
550 | ||
551 | rc = msm_adsp_get(adev->name, &adev->module, &adsp_ops, adev); | |
552 | if (rc) | |
553 | return rc; | |
554 | ||
555 | pr_info("adsp_open() module '%s' adev %p\n", adev->name, adev); | |
556 | filp->private_data = adev; | |
557 | adev->abort = 0; | |
558 | INIT_HLIST_HEAD(&adev->module->pmem_regions); | |
559 | mutex_init(&adev->module->pmem_regions_lock); | |
560 | ||
561 | return 0; | |
562 | } | |
563 | ||
564 | static unsigned adsp_device_count; | |
565 | static struct adsp_device *adsp_devices; | |
566 | ||
567 | static struct adsp_device *inode_to_device(struct inode *inode) | |
568 | { | |
569 | unsigned n = MINOR(inode->i_rdev); | |
570 | if (n < adsp_device_count) { | |
571 | if (adsp_devices[n].device) | |
572 | return adsp_devices + n; | |
573 | } | |
574 | return NULL; | |
575 | } | |
576 | ||
577 | static dev_t adsp_devno; | |
578 | static struct class *adsp_class; | |
579 | ||
580 | static struct file_operations adsp_fops = { | |
581 | .owner = THIS_MODULE, | |
582 | .open = adsp_open, | |
583 | .unlocked_ioctl = adsp_ioctl, | |
584 | .release = adsp_release, | |
6038f373 | 585 | .llseek = no_llseek, |
caff4cae IM |
586 | }; |
587 | ||
588 | static void adsp_create(struct adsp_device *adev, const char *name, | |
589 | struct device *parent, dev_t devt) | |
590 | { | |
591 | struct device *dev; | |
592 | int rc; | |
593 | ||
594 | dev = device_create(adsp_class, parent, devt, "%s", name); | |
595 | if (IS_ERR(dev)) | |
596 | return; | |
597 | ||
598 | init_waitqueue_head(&adev->event_wait); | |
599 | INIT_LIST_HEAD(&adev->event_queue); | |
600 | spin_lock_init(&adev->event_queue_lock); | |
601 | ||
602 | cdev_init(&adev->cdev, &adsp_fops); | |
603 | adev->cdev.owner = THIS_MODULE; | |
604 | ||
605 | rc = cdev_add(&adev->cdev, devt, 1); | |
606 | if (rc < 0) { | |
607 | device_destroy(adsp_class, devt); | |
608 | } else { | |
609 | adev->device = dev; | |
610 | adev->name = name; | |
611 | } | |
612 | } | |
613 | ||
614 | void msm_adsp_publish_cdevs(struct msm_adsp_module *modules, unsigned n) | |
615 | { | |
616 | int rc; | |
617 | ||
618 | adsp_devices = kzalloc(sizeof(struct adsp_device) * n, GFP_KERNEL); | |
619 | if (!adsp_devices) | |
620 | return; | |
621 | ||
622 | adsp_class = class_create(THIS_MODULE, "adsp"); | |
623 | if (IS_ERR(adsp_class)) | |
624 | goto fail_create_class; | |
625 | ||
626 | rc = alloc_chrdev_region(&adsp_devno, 0, n, "adsp"); | |
627 | if (rc < 0) | |
628 | goto fail_alloc_region; | |
629 | ||
630 | adsp_device_count = n; | |
631 | for (n = 0; n < adsp_device_count; n++) { | |
632 | adsp_create(adsp_devices + n, | |
633 | modules[n].name, &modules[n].pdev.dev, | |
634 | MKDEV(MAJOR(adsp_devno), n)); | |
635 | } | |
636 | ||
637 | return; | |
638 | ||
639 | fail_alloc_region: | |
640 | class_unregister(adsp_class); | |
641 | fail_create_class: | |
642 | kfree(adsp_devices); | |
643 | } |