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drivers: power: report battery voltage in AOSP compatible format
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / s390 / cio / chsc_sch.c
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CommitLineData
1/*
2 * Driver for s390 chsc subchannels
3 *
4 * Copyright IBM Corp. 2008, 2011
5 *
6 * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
7 *
8 */
9
10#include <linux/slab.h>
11#include <linux/compat.h>
12#include <linux/device.h>
13#include <linux/module.h>
14#include <linux/uaccess.h>
15#include <linux/miscdevice.h>
16#include <linux/kernel_stat.h>
17
18#include <asm/compat.h>
19#include <asm/cio.h>
20#include <asm/chsc.h>
21#include <asm/isc.h>
22
23#include "cio.h"
24#include "cio_debug.h"
25#include "css.h"
26#include "chsc_sch.h"
27#include "ioasm.h"
28
29static debug_info_t *chsc_debug_msg_id;
30static debug_info_t *chsc_debug_log_id;
31
32#define CHSC_MSG(imp, args...) do { \
33 debug_sprintf_event(chsc_debug_msg_id, imp , ##args); \
34 } while (0)
35
36#define CHSC_LOG(imp, txt) do { \
37 debug_text_event(chsc_debug_log_id, imp , txt); \
38 } while (0)
39
40static void CHSC_LOG_HEX(int level, void *data, int length)
41{
42 while (length > 0) {
43 debug_event(chsc_debug_log_id, level, data, length);
44 length -= chsc_debug_log_id->buf_size;
45 data += chsc_debug_log_id->buf_size;
46 }
47}
48
49MODULE_AUTHOR("IBM Corporation");
50MODULE_DESCRIPTION("driver for s390 chsc subchannels");
51MODULE_LICENSE("GPL");
52
53static void chsc_subchannel_irq(struct subchannel *sch)
54{
55 struct chsc_private *private = dev_get_drvdata(&sch->dev);
56 struct chsc_request *request = private->request;
57 struct irb *irb = (struct irb *)&S390_lowcore.irb;
58
59 CHSC_LOG(4, "irb");
60 CHSC_LOG_HEX(4, irb, sizeof(*irb));
61 inc_irq_stat(IRQIO_CSC);
62
63 /* Copy irb to provided request and set done. */
64 if (!request) {
65 CHSC_MSG(0, "Interrupt on sch 0.%x.%04x with no request\n",
66 sch->schid.ssid, sch->schid.sch_no);
67 return;
68 }
69 private->request = NULL;
70 memcpy(&request->irb, irb, sizeof(*irb));
71 cio_update_schib(sch);
72 complete(&request->completion);
73 put_device(&sch->dev);
74}
75
76static int chsc_subchannel_probe(struct subchannel *sch)
77{
78 struct chsc_private *private;
79 int ret;
80
81 CHSC_MSG(6, "Detected chsc subchannel 0.%x.%04x\n",
82 sch->schid.ssid, sch->schid.sch_no);
83 sch->isc = CHSC_SCH_ISC;
84 private = kzalloc(sizeof(*private), GFP_KERNEL);
85 if (!private)
86 return -ENOMEM;
87 dev_set_drvdata(&sch->dev, private);
88 ret = cio_enable_subchannel(sch, (u32)(unsigned long)sch);
89 if (ret) {
90 CHSC_MSG(0, "Failed to enable 0.%x.%04x: %d\n",
91 sch->schid.ssid, sch->schid.sch_no, ret);
92 dev_set_drvdata(&sch->dev, NULL);
93 kfree(private);
94 } else {
95 if (dev_get_uevent_suppress(&sch->dev)) {
96 dev_set_uevent_suppress(&sch->dev, 0);
97 kobject_uevent(&sch->dev.kobj, KOBJ_ADD);
98 }
99 }
100 return ret;
101}
102
103static int chsc_subchannel_remove(struct subchannel *sch)
104{
105 struct chsc_private *private;
106
107 cio_disable_subchannel(sch);
108 private = dev_get_drvdata(&sch->dev);
109 dev_set_drvdata(&sch->dev, NULL);
110 if (private->request) {
111 complete(&private->request->completion);
112 put_device(&sch->dev);
113 }
114 kfree(private);
115 return 0;
116}
117
118static void chsc_subchannel_shutdown(struct subchannel *sch)
119{
120 cio_disable_subchannel(sch);
121}
122
123static int chsc_subchannel_prepare(struct subchannel *sch)
124{
125 int cc;
126 struct schib schib;
127 /*
128 * Don't allow suspend while the subchannel is not idle
129 * since we don't have a way to clear the subchannel and
130 * cannot disable it with a request running.
131 */
132 cc = stsch_err(sch->schid, &schib);
133 if (!cc && scsw_stctl(&schib.scsw))
134 return -EAGAIN;
135 return 0;
136}
137
138static int chsc_subchannel_freeze(struct subchannel *sch)
139{
140 return cio_disable_subchannel(sch);
141}
142
143static int chsc_subchannel_restore(struct subchannel *sch)
144{
145 return cio_enable_subchannel(sch, (u32)(unsigned long)sch);
146}
147
148static struct css_device_id chsc_subchannel_ids[] = {
149 { .match_flags = 0x1, .type =SUBCHANNEL_TYPE_CHSC, },
150 { /* end of list */ },
151};
152MODULE_DEVICE_TABLE(css, chsc_subchannel_ids);
153
154static struct css_driver chsc_subchannel_driver = {
155 .drv = {
156 .owner = THIS_MODULE,
157 .name = "chsc_subchannel",
158 },
159 .subchannel_type = chsc_subchannel_ids,
160 .irq = chsc_subchannel_irq,
161 .probe = chsc_subchannel_probe,
162 .remove = chsc_subchannel_remove,
163 .shutdown = chsc_subchannel_shutdown,
164 .prepare = chsc_subchannel_prepare,
165 .freeze = chsc_subchannel_freeze,
166 .thaw = chsc_subchannel_restore,
167 .restore = chsc_subchannel_restore,
168};
169
170static int __init chsc_init_dbfs(void)
171{
172 chsc_debug_msg_id = debug_register("chsc_msg", 16, 1,
173 16 * sizeof(long));
174 if (!chsc_debug_msg_id)
175 goto out;
176 debug_register_view(chsc_debug_msg_id, &debug_sprintf_view);
177 debug_set_level(chsc_debug_msg_id, 2);
178 chsc_debug_log_id = debug_register("chsc_log", 16, 1, 16);
179 if (!chsc_debug_log_id)
180 goto out;
181 debug_register_view(chsc_debug_log_id, &debug_hex_ascii_view);
182 debug_set_level(chsc_debug_log_id, 2);
183 return 0;
184out:
185 if (chsc_debug_msg_id)
186 debug_unregister(chsc_debug_msg_id);
187 return -ENOMEM;
188}
189
190static void chsc_remove_dbfs(void)
191{
192 debug_unregister(chsc_debug_log_id);
193 debug_unregister(chsc_debug_msg_id);
194}
195
196static int __init chsc_init_sch_driver(void)
197{
198 return css_driver_register(&chsc_subchannel_driver);
199}
200
201static void chsc_cleanup_sch_driver(void)
202{
203 css_driver_unregister(&chsc_subchannel_driver);
204}
205
206static DEFINE_SPINLOCK(chsc_lock);
207
208static int chsc_subchannel_match_next_free(struct device *dev, void *data)
209{
210 struct subchannel *sch = to_subchannel(dev);
211
212 return sch->schib.pmcw.ena && !scsw_fctl(&sch->schib.scsw);
213}
214
215static struct subchannel *chsc_get_next_subchannel(struct subchannel *sch)
216{
217 struct device *dev;
218
219 dev = driver_find_device(&chsc_subchannel_driver.drv,
220 sch ? &sch->dev : NULL, NULL,
221 chsc_subchannel_match_next_free);
222 return dev ? to_subchannel(dev) : NULL;
223}
224
225/**
226 * chsc_async() - try to start a chsc request asynchronously
227 * @chsc_area: request to be started
228 * @request: request structure to associate
229 *
230 * Tries to start a chsc request on one of the existing chsc subchannels.
231 * Returns:
232 * %0 if the request was performed synchronously
233 * %-EINPROGRESS if the request was successfully started
234 * %-EBUSY if all chsc subchannels are busy
235 * %-ENODEV if no chsc subchannels are available
236 * Context:
237 * interrupts disabled, chsc_lock held
238 */
239static int chsc_async(struct chsc_async_area *chsc_area,
240 struct chsc_request *request)
241{
242 int cc;
243 struct chsc_private *private;
244 struct subchannel *sch = NULL;
245 int ret = -ENODEV;
246 char dbf[10];
247
248 chsc_area->header.key = PAGE_DEFAULT_KEY >> 4;
249 while ((sch = chsc_get_next_subchannel(sch))) {
250 spin_lock(sch->lock);
251 private = dev_get_drvdata(&sch->dev);
252 if (private->request) {
253 spin_unlock(sch->lock);
254 ret = -EBUSY;
255 continue;
256 }
257 chsc_area->header.sid = sch->schid;
258 CHSC_LOG(2, "schid");
259 CHSC_LOG_HEX(2, &sch->schid, sizeof(sch->schid));
260 cc = chsc(chsc_area);
261 sprintf(dbf, "cc:%d", cc);
262 CHSC_LOG(2, dbf);
263 switch (cc) {
264 case 0:
265 ret = 0;
266 break;
267 case 1:
268 sch->schib.scsw.cmd.fctl |= SCSW_FCTL_START_FUNC;
269 ret = -EINPROGRESS;
270 private->request = request;
271 break;
272 case 2:
273 ret = -EBUSY;
274 break;
275 default:
276 ret = -ENODEV;
277 }
278 spin_unlock(sch->lock);
279 CHSC_MSG(2, "chsc on 0.%x.%04x returned cc=%d\n",
280 sch->schid.ssid, sch->schid.sch_no, cc);
281 if (ret == -EINPROGRESS)
282 return -EINPROGRESS;
283 put_device(&sch->dev);
284 if (ret == 0)
285 return 0;
286 }
287 return ret;
288}
289
290static void chsc_log_command(struct chsc_async_area *chsc_area)
291{
292 char dbf[10];
293
294 sprintf(dbf, "CHSC:%x", chsc_area->header.code);
295 CHSC_LOG(0, dbf);
296 CHSC_LOG_HEX(0, chsc_area, 32);
297}
298
299static int chsc_examine_irb(struct chsc_request *request)
300{
301 int backed_up;
302
303 if (!(scsw_stctl(&request->irb.scsw) & SCSW_STCTL_STATUS_PEND))
304 return -EIO;
305 backed_up = scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHAIN_CHECK;
306 request->irb.scsw.cmd.cstat &= ~SCHN_STAT_CHAIN_CHECK;
307 if (scsw_cstat(&request->irb.scsw) == 0)
308 return 0;
309 if (!backed_up)
310 return 0;
311 if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROG_CHECK)
312 return -EIO;
313 if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_PROT_CHECK)
314 return -EPERM;
315 if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_DATA_CHK)
316 return -EAGAIN;
317 if (scsw_cstat(&request->irb.scsw) & SCHN_STAT_CHN_CTRL_CHK)
318 return -EAGAIN;
319 return -EIO;
320}
321
322static int chsc_ioctl_start(void __user *user_area)
323{
324 struct chsc_request *request;
325 struct chsc_async_area *chsc_area;
326 int ret;
327 char dbf[10];
328
329 if (!css_general_characteristics.dynio)
330 /* It makes no sense to try. */
331 return -EOPNOTSUPP;
332 chsc_area = (void *)get_zeroed_page(GFP_DMA | GFP_KERNEL);
333 if (!chsc_area)
334 return -ENOMEM;
335 request = kzalloc(sizeof(*request), GFP_KERNEL);
336 if (!request) {
337 ret = -ENOMEM;
338 goto out_free;
339 }
340 init_completion(&request->completion);
341 if (copy_from_user(chsc_area, user_area, PAGE_SIZE)) {
342 ret = -EFAULT;
343 goto out_free;
344 }
345 chsc_log_command(chsc_area);
346 spin_lock_irq(&chsc_lock);
347 ret = chsc_async(chsc_area, request);
348 spin_unlock_irq(&chsc_lock);
349 if (ret == -EINPROGRESS) {
350 wait_for_completion(&request->completion);
351 ret = chsc_examine_irb(request);
352 }
353 /* copy area back to user */
354 if (!ret)
355 if (copy_to_user(user_area, chsc_area, PAGE_SIZE))
356 ret = -EFAULT;
357out_free:
358 sprintf(dbf, "ret:%d", ret);
359 CHSC_LOG(0, dbf);
360 kfree(request);
361 free_page((unsigned long)chsc_area);
362 return ret;
363}
364
365static int chsc_ioctl_info_channel_path(void __user *user_cd)
366{
367 struct chsc_chp_cd *cd;
368 int ret, ccode;
369 struct {
370 struct chsc_header request;
371 u32 : 2;
372 u32 m : 1;
373 u32 : 1;
374 u32 fmt1 : 4;
375 u32 cssid : 8;
376 u32 : 8;
377 u32 first_chpid : 8;
378 u32 : 24;
379 u32 last_chpid : 8;
380 u32 : 32;
381 struct chsc_header response;
382 u8 data[PAGE_SIZE - 20];
383 } __attribute__ ((packed)) *scpcd_area;
384
385 scpcd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
386 if (!scpcd_area)
387 return -ENOMEM;
388 cd = kzalloc(sizeof(*cd), GFP_KERNEL);
389 if (!cd) {
390 ret = -ENOMEM;
391 goto out_free;
392 }
393 if (copy_from_user(cd, user_cd, sizeof(*cd))) {
394 ret = -EFAULT;
395 goto out_free;
396 }
397 scpcd_area->request.length = 0x0010;
398 scpcd_area->request.code = 0x0028;
399 scpcd_area->m = cd->m;
400 scpcd_area->fmt1 = cd->fmt;
401 scpcd_area->cssid = cd->chpid.cssid;
402 scpcd_area->first_chpid = cd->chpid.id;
403 scpcd_area->last_chpid = cd->chpid.id;
404
405 ccode = chsc(scpcd_area);
406 if (ccode != 0) {
407 ret = -EIO;
408 goto out_free;
409 }
410 if (scpcd_area->response.code != 0x0001) {
411 ret = -EIO;
412 CHSC_MSG(0, "scpcd: response code=%x\n",
413 scpcd_area->response.code);
414 goto out_free;
415 }
416 memcpy(&cd->cpcb, &scpcd_area->response, scpcd_area->response.length);
417 if (copy_to_user(user_cd, cd, sizeof(*cd)))
418 ret = -EFAULT;
419 else
420 ret = 0;
421out_free:
422 kfree(cd);
423 free_page((unsigned long)scpcd_area);
424 return ret;
425}
426
427static int chsc_ioctl_info_cu(void __user *user_cd)
428{
429 struct chsc_cu_cd *cd;
430 int ret, ccode;
431 struct {
432 struct chsc_header request;
433 u32 : 2;
434 u32 m : 1;
435 u32 : 1;
436 u32 fmt1 : 4;
437 u32 cssid : 8;
438 u32 : 8;
439 u32 first_cun : 8;
440 u32 : 24;
441 u32 last_cun : 8;
442 u32 : 32;
443 struct chsc_header response;
444 u8 data[PAGE_SIZE - 20];
445 } __attribute__ ((packed)) *scucd_area;
446
447 scucd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
448 if (!scucd_area)
449 return -ENOMEM;
450 cd = kzalloc(sizeof(*cd), GFP_KERNEL);
451 if (!cd) {
452 ret = -ENOMEM;
453 goto out_free;
454 }
455 if (copy_from_user(cd, user_cd, sizeof(*cd))) {
456 ret = -EFAULT;
457 goto out_free;
458 }
459 scucd_area->request.length = 0x0010;
460 scucd_area->request.code = 0x0028;
461 scucd_area->m = cd->m;
462 scucd_area->fmt1 = cd->fmt;
463 scucd_area->cssid = cd->cssid;
464 scucd_area->first_cun = cd->cun;
465 scucd_area->last_cun = cd->cun;
466
467 ccode = chsc(scucd_area);
468 if (ccode != 0) {
469 ret = -EIO;
470 goto out_free;
471 }
472 if (scucd_area->response.code != 0x0001) {
473 ret = -EIO;
474 CHSC_MSG(0, "scucd: response code=%x\n",
475 scucd_area->response.code);
476 goto out_free;
477 }
478 memcpy(&cd->cucb, &scucd_area->response, scucd_area->response.length);
479 if (copy_to_user(user_cd, cd, sizeof(*cd)))
480 ret = -EFAULT;
481 else
482 ret = 0;
483out_free:
484 kfree(cd);
485 free_page((unsigned long)scucd_area);
486 return ret;
487}
488
489static int chsc_ioctl_info_sch_cu(void __user *user_cud)
490{
491 struct chsc_sch_cud *cud;
492 int ret, ccode;
493 struct {
494 struct chsc_header request;
495 u32 : 2;
496 u32 m : 1;
497 u32 : 5;
498 u32 fmt1 : 4;
499 u32 : 2;
500 u32 ssid : 2;
501 u32 first_sch : 16;
502 u32 : 8;
503 u32 cssid : 8;
504 u32 last_sch : 16;
505 u32 : 32;
506 struct chsc_header response;
507 u8 data[PAGE_SIZE - 20];
508 } __attribute__ ((packed)) *sscud_area;
509
510 sscud_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
511 if (!sscud_area)
512 return -ENOMEM;
513 cud = kzalloc(sizeof(*cud), GFP_KERNEL);
514 if (!cud) {
515 ret = -ENOMEM;
516 goto out_free;
517 }
518 if (copy_from_user(cud, user_cud, sizeof(*cud))) {
519 ret = -EFAULT;
520 goto out_free;
521 }
522 sscud_area->request.length = 0x0010;
523 sscud_area->request.code = 0x0006;
524 sscud_area->m = cud->schid.m;
525 sscud_area->fmt1 = cud->fmt;
526 sscud_area->ssid = cud->schid.ssid;
527 sscud_area->first_sch = cud->schid.sch_no;
528 sscud_area->cssid = cud->schid.cssid;
529 sscud_area->last_sch = cud->schid.sch_no;
530
531 ccode = chsc(sscud_area);
532 if (ccode != 0) {
533 ret = -EIO;
534 goto out_free;
535 }
536 if (sscud_area->response.code != 0x0001) {
537 ret = -EIO;
538 CHSC_MSG(0, "sscud: response code=%x\n",
539 sscud_area->response.code);
540 goto out_free;
541 }
542 memcpy(&cud->scub, &sscud_area->response, sscud_area->response.length);
543 if (copy_to_user(user_cud, cud, sizeof(*cud)))
544 ret = -EFAULT;
545 else
546 ret = 0;
547out_free:
548 kfree(cud);
549 free_page((unsigned long)sscud_area);
550 return ret;
551}
552
553static int chsc_ioctl_conf_info(void __user *user_ci)
554{
555 struct chsc_conf_info *ci;
556 int ret, ccode;
557 struct {
558 struct chsc_header request;
559 u32 : 2;
560 u32 m : 1;
561 u32 : 1;
562 u32 fmt1 : 4;
563 u32 cssid : 8;
564 u32 : 6;
565 u32 ssid : 2;
566 u32 : 8;
567 u64 : 64;
568 struct chsc_header response;
569 u8 data[PAGE_SIZE - 20];
570 } __attribute__ ((packed)) *sci_area;
571
572 sci_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
573 if (!sci_area)
574 return -ENOMEM;
575 ci = kzalloc(sizeof(*ci), GFP_KERNEL);
576 if (!ci) {
577 ret = -ENOMEM;
578 goto out_free;
579 }
580 if (copy_from_user(ci, user_ci, sizeof(*ci))) {
581 ret = -EFAULT;
582 goto out_free;
583 }
584 sci_area->request.length = 0x0010;
585 sci_area->request.code = 0x0012;
586 sci_area->m = ci->id.m;
587 sci_area->fmt1 = ci->fmt;
588 sci_area->cssid = ci->id.cssid;
589 sci_area->ssid = ci->id.ssid;
590
591 ccode = chsc(sci_area);
592 if (ccode != 0) {
593 ret = -EIO;
594 goto out_free;
595 }
596 if (sci_area->response.code != 0x0001) {
597 ret = -EIO;
598 CHSC_MSG(0, "sci: response code=%x\n",
599 sci_area->response.code);
600 goto out_free;
601 }
602 memcpy(&ci->scid, &sci_area->response, sci_area->response.length);
603 if (copy_to_user(user_ci, ci, sizeof(*ci)))
604 ret = -EFAULT;
605 else
606 ret = 0;
607out_free:
608 kfree(ci);
609 free_page((unsigned long)sci_area);
610 return ret;
611}
612
613static int chsc_ioctl_conf_comp_list(void __user *user_ccl)
614{
615 struct chsc_comp_list *ccl;
616 int ret, ccode;
617 struct {
618 struct chsc_header request;
619 u32 ctype : 8;
620 u32 : 4;
621 u32 fmt : 4;
622 u32 : 16;
623 u64 : 64;
624 u32 list_parm[2];
625 u64 : 64;
626 struct chsc_header response;
627 u8 data[PAGE_SIZE - 36];
628 } __attribute__ ((packed)) *sccl_area;
629 struct {
630 u32 m : 1;
631 u32 : 31;
632 u32 cssid : 8;
633 u32 : 16;
634 u32 chpid : 8;
635 } __attribute__ ((packed)) *chpid_parm;
636 struct {
637 u32 f_cssid : 8;
638 u32 l_cssid : 8;
639 u32 : 16;
640 u32 res;
641 } __attribute__ ((packed)) *cssids_parm;
642
643 sccl_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
644 if (!sccl_area)
645 return -ENOMEM;
646 ccl = kzalloc(sizeof(*ccl), GFP_KERNEL);
647 if (!ccl) {
648 ret = -ENOMEM;
649 goto out_free;
650 }
651 if (copy_from_user(ccl, user_ccl, sizeof(*ccl))) {
652 ret = -EFAULT;
653 goto out_free;
654 }
655 sccl_area->request.length = 0x0020;
656 sccl_area->request.code = 0x0030;
657 sccl_area->fmt = ccl->req.fmt;
658 sccl_area->ctype = ccl->req.ctype;
659 switch (sccl_area->ctype) {
660 case CCL_CU_ON_CHP:
661 case CCL_IOP_CHP:
662 chpid_parm = (void *)&sccl_area->list_parm;
663 chpid_parm->m = ccl->req.chpid.m;
664 chpid_parm->cssid = ccl->req.chpid.chp.cssid;
665 chpid_parm->chpid = ccl->req.chpid.chp.id;
666 break;
667 case CCL_CSS_IMG:
668 case CCL_CSS_IMG_CONF_CHAR:
669 cssids_parm = (void *)&sccl_area->list_parm;
670 cssids_parm->f_cssid = ccl->req.cssids.f_cssid;
671 cssids_parm->l_cssid = ccl->req.cssids.l_cssid;
672 break;
673 }
674 ccode = chsc(sccl_area);
675 if (ccode != 0) {
676 ret = -EIO;
677 goto out_free;
678 }
679 if (sccl_area->response.code != 0x0001) {
680 ret = -EIO;
681 CHSC_MSG(0, "sccl: response code=%x\n",
682 sccl_area->response.code);
683 goto out_free;
684 }
685 memcpy(&ccl->sccl, &sccl_area->response, sccl_area->response.length);
686 if (copy_to_user(user_ccl, ccl, sizeof(*ccl)))
687 ret = -EFAULT;
688 else
689 ret = 0;
690out_free:
691 kfree(ccl);
692 free_page((unsigned long)sccl_area);
693 return ret;
694}
695
696static int chsc_ioctl_chpd(void __user *user_chpd)
697{
698 struct chsc_scpd *scpd_area;
699 struct chsc_cpd_info *chpd;
700 int ret;
701
702 chpd = kzalloc(sizeof(*chpd), GFP_KERNEL);
703 scpd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
704 if (!scpd_area || !chpd) {
705 ret = -ENOMEM;
706 goto out_free;
707 }
708 if (copy_from_user(chpd, user_chpd, sizeof(*chpd))) {
709 ret = -EFAULT;
710 goto out_free;
711 }
712 ret = chsc_determine_channel_path_desc(chpd->chpid, chpd->fmt,
713 chpd->rfmt, chpd->c, chpd->m,
714 scpd_area);
715 if (ret)
716 goto out_free;
717 memcpy(&chpd->chpdb, &scpd_area->response, scpd_area->response.length);
718 if (copy_to_user(user_chpd, chpd, sizeof(*chpd)))
719 ret = -EFAULT;
720out_free:
721 kfree(chpd);
722 free_page((unsigned long)scpd_area);
723 return ret;
724}
725
726static int chsc_ioctl_dcal(void __user *user_dcal)
727{
728 struct chsc_dcal *dcal;
729 int ret, ccode;
730 struct {
731 struct chsc_header request;
732 u32 atype : 8;
733 u32 : 4;
734 u32 fmt : 4;
735 u32 : 16;
736 u32 res0[2];
737 u32 list_parm[2];
738 u32 res1[2];
739 struct chsc_header response;
740 u8 data[PAGE_SIZE - 36];
741 } __attribute__ ((packed)) *sdcal_area;
742
743 sdcal_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
744 if (!sdcal_area)
745 return -ENOMEM;
746 dcal = kzalloc(sizeof(*dcal), GFP_KERNEL);
747 if (!dcal) {
748 ret = -ENOMEM;
749 goto out_free;
750 }
751 if (copy_from_user(dcal, user_dcal, sizeof(*dcal))) {
752 ret = -EFAULT;
753 goto out_free;
754 }
755 sdcal_area->request.length = 0x0020;
756 sdcal_area->request.code = 0x0034;
757 sdcal_area->atype = dcal->req.atype;
758 sdcal_area->fmt = dcal->req.fmt;
759 memcpy(&sdcal_area->list_parm, &dcal->req.list_parm,
760 sizeof(sdcal_area->list_parm));
761
762 ccode = chsc(sdcal_area);
763 if (ccode != 0) {
764 ret = -EIO;
765 goto out_free;
766 }
767 if (sdcal_area->response.code != 0x0001) {
768 ret = -EIO;
769 CHSC_MSG(0, "sdcal: response code=%x\n",
770 sdcal_area->response.code);
771 goto out_free;
772 }
773 memcpy(&dcal->sdcal, &sdcal_area->response,
774 sdcal_area->response.length);
775 if (copy_to_user(user_dcal, dcal, sizeof(*dcal)))
776 ret = -EFAULT;
777 else
778 ret = 0;
779out_free:
780 kfree(dcal);
781 free_page((unsigned long)sdcal_area);
782 return ret;
783}
784
785static long chsc_ioctl(struct file *filp, unsigned int cmd,
786 unsigned long arg)
787{
788 void __user *argp;
789
790 CHSC_MSG(2, "chsc_ioctl called, cmd=%x\n", cmd);
791 if (is_compat_task())
792 argp = compat_ptr(arg);
793 else
794 argp = (void __user *)arg;
795 switch (cmd) {
796 case CHSC_START:
797 return chsc_ioctl_start(argp);
798 case CHSC_INFO_CHANNEL_PATH:
799 return chsc_ioctl_info_channel_path(argp);
800 case CHSC_INFO_CU:
801 return chsc_ioctl_info_cu(argp);
802 case CHSC_INFO_SCH_CU:
803 return chsc_ioctl_info_sch_cu(argp);
804 case CHSC_INFO_CI:
805 return chsc_ioctl_conf_info(argp);
806 case CHSC_INFO_CCL:
807 return chsc_ioctl_conf_comp_list(argp);
808 case CHSC_INFO_CPD:
809 return chsc_ioctl_chpd(argp);
810 case CHSC_INFO_DCAL:
811 return chsc_ioctl_dcal(argp);
812 default: /* unknown ioctl number */
813 return -ENOIOCTLCMD;
814 }
815}
816
817static const struct file_operations chsc_fops = {
818 .owner = THIS_MODULE,
819 .open = nonseekable_open,
820 .unlocked_ioctl = chsc_ioctl,
821 .compat_ioctl = chsc_ioctl,
822 .llseek = no_llseek,
823};
824
825static struct miscdevice chsc_misc_device = {
826 .minor = MISC_DYNAMIC_MINOR,
827 .name = "chsc",
828 .fops = &chsc_fops,
829};
830
831static int __init chsc_misc_init(void)
832{
833 return misc_register(&chsc_misc_device);
834}
835
836static void chsc_misc_cleanup(void)
837{
838 misc_deregister(&chsc_misc_device);
839}
840
841static int __init chsc_sch_init(void)
842{
843 int ret;
844
845 ret = chsc_init_dbfs();
846 if (ret)
847 return ret;
848 isc_register(CHSC_SCH_ISC);
849 ret = chsc_init_sch_driver();
850 if (ret)
851 goto out_dbf;
852 ret = chsc_misc_init();
853 if (ret)
854 goto out_driver;
855 return ret;
856out_driver:
857 chsc_cleanup_sch_driver();
858out_dbf:
859 isc_unregister(CHSC_SCH_ISC);
860 chsc_remove_dbfs();
861 return ret;
862}
863
864static void __exit chsc_sch_exit(void)
865{
866 chsc_misc_cleanup();
867 chsc_cleanup_sch_driver();
868 isc_unregister(CHSC_SCH_ISC);
869 chsc_remove_dbfs();
870}
871
872module_init(chsc_sch_init);
873module_exit(chsc_sch_exit);
kernel source for telekom puls (alcatel/mediatek)