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1da177e4 LT |
1 | /* |
2 | * dvb_ca.c: generic DVB functions for EN50221 CAM interfaces | |
3 | * | |
4 | * Copyright (C) 2004 Andrew de Quincey | |
5 | * | |
6 | * Parts of this file were based on sources as follows: | |
7 | * | |
8 | * Copyright (C) 2003 Ralph Metzler <rjkm@metzlerbros.de> | |
9 | * | |
10 | * based on code: | |
11 | * | |
12 | * Copyright (C) 1999-2002 Ralph Metzler | |
13 | * & Marcus Metzler for convergence integrated media GmbH | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or | |
16 | * modify it under the terms of the GNU General Public License | |
17 | * as published by the Free Software Foundation; either version 2 | |
18 | * of the License, or (at your option) any later version. | |
19 | * | |
20 | * This program is distributed in the hope that it will be useful, | |
21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
23 | * GNU General Public License for more details. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License | |
26 | * along with this program; if not, write to the Free Software | |
27 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
28 | * Or, point your browser to http://www.gnu.org/copyleft/gpl.html | |
29 | */ | |
30 | ||
31 | #include <linux/errno.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/list.h> | |
34 | #include <linux/module.h> | |
1da177e4 LT |
35 | #include <linux/vmalloc.h> |
36 | #include <linux/delay.h> | |
ded92846 | 37 | #include <linux/spinlock.h> |
4e57b681 | 38 | #include <linux/sched.h> |
9320874a | 39 | #include <linux/kthread.h> |
1da177e4 LT |
40 | |
41 | #include "dvb_ca_en50221.h" | |
42 | #include "dvb_ringbuffer.h" | |
43 | ||
44 | static int dvb_ca_en50221_debug; | |
45 | ||
46 | module_param_named(cam_debug, dvb_ca_en50221_debug, int, 0644); | |
47 | MODULE_PARM_DESC(cam_debug, "enable verbose debug messages"); | |
48 | ||
49 | #define dprintk if (dvb_ca_en50221_debug) printk | |
50 | ||
50b447d5 | 51 | #define INIT_TIMEOUT_SECS 10 |
1da177e4 LT |
52 | |
53 | #define HOST_LINK_BUF_SIZE 0x200 | |
54 | ||
55 | #define RX_BUFFER_SIZE 65535 | |
56 | ||
57 | #define MAX_RX_PACKETS_PER_ITERATION 10 | |
58 | ||
59 | #define CTRLIF_DATA 0 | |
60 | #define CTRLIF_COMMAND 1 | |
61 | #define CTRLIF_STATUS 1 | |
62 | #define CTRLIF_SIZE_LOW 2 | |
63 | #define CTRLIF_SIZE_HIGH 3 | |
64 | ||
65 | #define CMDREG_HC 1 /* Host control */ | |
66 | #define CMDREG_SW 2 /* Size write */ | |
67 | #define CMDREG_SR 4 /* Size read */ | |
68 | #define CMDREG_RS 8 /* Reset interface */ | |
69 | #define CMDREG_FRIE 0x40 /* Enable FR interrupt */ | |
70 | #define CMDREG_DAIE 0x80 /* Enable DA interrupt */ | |
71 | #define IRQEN (CMDREG_DAIE) | |
72 | ||
73 | #define STATUSREG_RE 1 /* read error */ | |
74 | #define STATUSREG_WE 2 /* write error */ | |
75 | #define STATUSREG_FR 0x40 /* module free */ | |
76 | #define STATUSREG_DA 0x80 /* data available */ | |
77 | #define STATUSREG_TXERR (STATUSREG_RE|STATUSREG_WE) /* general transfer error */ | |
78 | ||
79 | ||
80 | #define DVB_CA_SLOTSTATE_NONE 0 | |
81 | #define DVB_CA_SLOTSTATE_UNINITIALISED 1 | |
82 | #define DVB_CA_SLOTSTATE_RUNNING 2 | |
83 | #define DVB_CA_SLOTSTATE_INVALID 3 | |
84 | #define DVB_CA_SLOTSTATE_WAITREADY 4 | |
85 | #define DVB_CA_SLOTSTATE_VALIDATE 5 | |
86 | #define DVB_CA_SLOTSTATE_WAITFR 6 | |
87 | #define DVB_CA_SLOTSTATE_LINKINIT 7 | |
88 | ||
89 | ||
90 | /* Information on a CA slot */ | |
91 | struct dvb_ca_slot { | |
92 | ||
93 | /* current state of the CAM */ | |
94 | int slot_state; | |
95 | ||
d7e43844 MD |
96 | /* mutex used for serializing access to one CI slot */ |
97 | struct mutex slot_lock; | |
98 | ||
1da177e4 LT |
99 | /* Number of CAMCHANGES that have occurred since last processing */ |
100 | atomic_t camchange_count; | |
101 | ||
102 | /* Type of last CAMCHANGE */ | |
103 | int camchange_type; | |
104 | ||
105 | /* base address of CAM config */ | |
106 | u32 config_base; | |
107 | ||
108 | /* value to write into Config Control register */ | |
109 | u8 config_option; | |
110 | ||
111 | /* if 1, the CAM supports DA IRQs */ | |
112 | u8 da_irq_supported:1; | |
113 | ||
114 | /* size of the buffer to use when talking to the CAM */ | |
115 | int link_buf_size; | |
116 | ||
1da177e4 LT |
117 | /* buffer for incoming packets */ |
118 | struct dvb_ringbuffer rx_buffer; | |
119 | ||
120 | /* timer used during various states of the slot */ | |
121 | unsigned long timeout; | |
122 | }; | |
123 | ||
124 | /* Private CA-interface information */ | |
125 | struct dvb_ca_private { | |
126 | ||
127 | /* pointer back to the public data structure */ | |
128 | struct dvb_ca_en50221 *pub; | |
129 | ||
130 | /* the DVB device */ | |
131 | struct dvb_device *dvbdev; | |
132 | ||
133 | /* Flags describing the interface (DVB_CA_FLAG_*) */ | |
134 | u32 flags; | |
135 | ||
136 | /* number of slots supported by this CA interface */ | |
137 | unsigned int slot_count; | |
138 | ||
139 | /* information on each slot */ | |
140 | struct dvb_ca_slot *slot_info; | |
141 | ||
142 | /* wait queues for read() and write() operations */ | |
143 | wait_queue_head_t wait_queue; | |
144 | ||
145 | /* PID of the monitoring thread */ | |
9320874a | 146 | struct task_struct *thread; |
1da177e4 LT |
147 | |
148 | /* Flag indicating if the CA device is open */ | |
149 | unsigned int open:1; | |
150 | ||
151 | /* Flag indicating the thread should wake up now */ | |
152 | unsigned int wakeup:1; | |
153 | ||
154 | /* Delay the main thread should use */ | |
155 | unsigned long delay; | |
156 | ||
157 | /* Slot to start looking for data to read from in the next user-space read operation */ | |
158 | int next_read_slot; | |
30ad64b8 NS |
159 | |
160 | /* mutex serializing ioctls */ | |
161 | struct mutex ioctl_mutex; | |
1da177e4 LT |
162 | }; |
163 | ||
164 | static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca); | |
165 | static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, u8 * ebuf, int ecount); | |
166 | static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, u8 * ebuf, int ecount); | |
167 | ||
168 | ||
169 | /** | |
170 | * Safely find needle in haystack. | |
171 | * | |
172 | * @param haystack Buffer to look in. | |
173 | * @param hlen Number of bytes in haystack. | |
174 | * @param needle Buffer to find. | |
175 | * @param nlen Number of bytes in needle. | |
176 | * @return Pointer into haystack needle was found at, or NULL if not found. | |
177 | */ | |
260f8d7c | 178 | static char *findstr(char * haystack, int hlen, char * needle, int nlen) |
1da177e4 LT |
179 | { |
180 | int i; | |
181 | ||
182 | if (hlen < nlen) | |
183 | return NULL; | |
184 | ||
185 | for (i = 0; i <= hlen - nlen; i++) { | |
186 | if (!strncmp(haystack + i, needle, nlen)) | |
187 | return haystack + i; | |
188 | } | |
189 | ||
190 | return NULL; | |
191 | } | |
192 | ||
193 | ||
194 | ||
195 | /* ******************************************************************************** */ | |
196 | /* EN50221 physical interface functions */ | |
197 | ||
198 | ||
199 | /** | |
200 | * Check CAM status. | |
201 | */ | |
202 | static int dvb_ca_en50221_check_camstatus(struct dvb_ca_private *ca, int slot) | |
203 | { | |
204 | int slot_status; | |
205 | int cam_present_now; | |
206 | int cam_changed; | |
207 | ||
208 | /* IRQ mode */ | |
209 | if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE) { | |
210 | return (atomic_read(&ca->slot_info[slot].camchange_count) != 0); | |
211 | } | |
212 | ||
213 | /* poll mode */ | |
214 | slot_status = ca->pub->poll_slot_status(ca->pub, slot, ca->open); | |
215 | ||
216 | cam_present_now = (slot_status & DVB_CA_EN50221_POLL_CAM_PRESENT) ? 1 : 0; | |
217 | cam_changed = (slot_status & DVB_CA_EN50221_POLL_CAM_CHANGED) ? 1 : 0; | |
218 | if (!cam_changed) { | |
219 | int cam_present_old = (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_NONE); | |
220 | cam_changed = (cam_present_now != cam_present_old); | |
221 | } | |
222 | ||
223 | if (cam_changed) { | |
224 | if (!cam_present_now) { | |
225 | ca->slot_info[slot].camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; | |
226 | } else { | |
227 | ca->slot_info[slot].camchange_type = DVB_CA_EN50221_CAMCHANGE_INSERTED; | |
228 | } | |
229 | atomic_set(&ca->slot_info[slot].camchange_count, 1); | |
230 | } else { | |
231 | if ((ca->slot_info[slot].slot_state == DVB_CA_SLOTSTATE_WAITREADY) && | |
232 | (slot_status & DVB_CA_EN50221_POLL_CAM_READY)) { | |
233 | // move to validate state if reset is completed | |
234 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_VALIDATE; | |
235 | } | |
236 | } | |
237 | ||
238 | return cam_changed; | |
239 | } | |
240 | ||
241 | ||
242 | /** | |
243 | * Wait for flags to become set on the STATUS register on a CAM interface, | |
244 | * checking for errors and timeout. | |
245 | * | |
246 | * @param ca CA instance. | |
247 | * @param slot Slot on interface. | |
248 | * @param waitfor Flags to wait for. | |
249 | * @param timeout_ms Timeout in milliseconds. | |
250 | * | |
251 | * @return 0 on success, nonzero on error. | |
252 | */ | |
253 | static int dvb_ca_en50221_wait_if_status(struct dvb_ca_private *ca, int slot, | |
254 | u8 waitfor, int timeout_hz) | |
255 | { | |
256 | unsigned long timeout; | |
257 | unsigned long start; | |
258 | ||
46b4f7c1 | 259 | dprintk("%s\n", __func__); |
1da177e4 LT |
260 | |
261 | /* loop until timeout elapsed */ | |
262 | start = jiffies; | |
263 | timeout = jiffies + timeout_hz; | |
264 | while (1) { | |
265 | /* read the status and check for error */ | |
266 | int res = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); | |
267 | if (res < 0) | |
268 | return -EIO; | |
269 | ||
270 | /* if we got the flags, it was successful! */ | |
271 | if (res & waitfor) { | |
46b4f7c1 | 272 | dprintk("%s succeeded timeout:%lu\n", __func__, jiffies - start); |
1da177e4 LT |
273 | return 0; |
274 | } | |
275 | ||
276 | /* check for timeout */ | |
277 | if (time_after(jiffies, timeout)) { | |
278 | break; | |
279 | } | |
280 | ||
281 | /* wait for a bit */ | |
282 | msleep(1); | |
283 | } | |
284 | ||
46b4f7c1 | 285 | dprintk("%s failed timeout:%lu\n", __func__, jiffies - start); |
1da177e4 LT |
286 | |
287 | /* if we get here, we've timed out */ | |
288 | return -ETIMEDOUT; | |
289 | } | |
290 | ||
291 | ||
292 | /** | |
293 | * Initialise the link layer connection to a CAM. | |
294 | * | |
295 | * @param ca CA instance. | |
296 | * @param slot Slot id. | |
297 | * | |
298 | * @return 0 on success, nonzero on failure. | |
299 | */ | |
300 | static int dvb_ca_en50221_link_init(struct dvb_ca_private *ca, int slot) | |
301 | { | |
302 | int ret; | |
303 | int buf_size; | |
304 | u8 buf[2]; | |
305 | ||
46b4f7c1 | 306 | dprintk("%s\n", __func__); |
1da177e4 LT |
307 | |
308 | /* we'll be determining these during this function */ | |
309 | ca->slot_info[slot].da_irq_supported = 0; | |
310 | ||
311 | /* set the host link buffer size temporarily. it will be overwritten with the | |
312 | * real negotiated size later. */ | |
313 | ca->slot_info[slot].link_buf_size = 2; | |
314 | ||
315 | /* read the buffer size from the CAM */ | |
316 | if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN | CMDREG_SR)) != 0) | |
317 | return ret; | |
318 | if ((ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_DA, HZ / 10)) != 0) | |
319 | return ret; | |
320 | if ((ret = dvb_ca_en50221_read_data(ca, slot, buf, 2)) != 2) | |
321 | return -EIO; | |
322 | if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN)) != 0) | |
323 | return ret; | |
324 | ||
325 | /* store it, and choose the minimum of our buffer and the CAM's buffer size */ | |
326 | buf_size = (buf[0] << 8) | buf[1]; | |
327 | if (buf_size > HOST_LINK_BUF_SIZE) | |
328 | buf_size = HOST_LINK_BUF_SIZE; | |
329 | ca->slot_info[slot].link_buf_size = buf_size; | |
330 | buf[0] = buf_size >> 8; | |
331 | buf[1] = buf_size & 0xff; | |
332 | dprintk("Chosen link buffer size of %i\n", buf_size); | |
333 | ||
334 | /* write the buffer size to the CAM */ | |
335 | if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN | CMDREG_SW)) != 0) | |
336 | return ret; | |
337 | if ((ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_FR, HZ / 10)) != 0) | |
338 | return ret; | |
339 | if ((ret = dvb_ca_en50221_write_data(ca, slot, buf, 2)) != 2) | |
340 | return -EIO; | |
341 | if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN)) != 0) | |
342 | return ret; | |
343 | ||
344 | /* success */ | |
345 | return 0; | |
346 | } | |
347 | ||
348 | /** | |
349 | * Read a tuple from attribute memory. | |
350 | * | |
351 | * @param ca CA instance. | |
352 | * @param slot Slot id. | |
353 | * @param address Address to read from. Updated. | |
354 | * @param tupleType Tuple id byte. Updated. | |
355 | * @param tupleLength Tuple length. Updated. | |
356 | * @param tuple Dest buffer for tuple (must be 256 bytes). Updated. | |
357 | * | |
358 | * @return 0 on success, nonzero on error. | |
359 | */ | |
360 | static int dvb_ca_en50221_read_tuple(struct dvb_ca_private *ca, int slot, | |
361 | int *address, int *tupleType, int *tupleLength, u8 * tuple) | |
362 | { | |
363 | int i; | |
364 | int _tupleType; | |
365 | int _tupleLength; | |
366 | int _address = *address; | |
367 | ||
368 | /* grab the next tuple length and type */ | |
369 | if ((_tupleType = ca->pub->read_attribute_mem(ca->pub, slot, _address)) < 0) | |
370 | return _tupleType; | |
371 | if (_tupleType == 0xff) { | |
372 | dprintk("END OF CHAIN TUPLE type:0x%x\n", _tupleType); | |
373 | *address += 2; | |
374 | *tupleType = _tupleType; | |
375 | *tupleLength = 0; | |
376 | return 0; | |
377 | } | |
378 | if ((_tupleLength = ca->pub->read_attribute_mem(ca->pub, slot, _address + 2)) < 0) | |
379 | return _tupleLength; | |
380 | _address += 4; | |
381 | ||
382 | dprintk("TUPLE type:0x%x length:%i\n", _tupleType, _tupleLength); | |
383 | ||
384 | /* read in the whole tuple */ | |
385 | for (i = 0; i < _tupleLength; i++) { | |
386 | tuple[i] = ca->pub->read_attribute_mem(ca->pub, slot, _address + (i * 2)); | |
387 | dprintk(" 0x%02x: 0x%02x %c\n", | |
388 | i, tuple[i] & 0xff, | |
389 | ((tuple[i] > 31) && (tuple[i] < 127)) ? tuple[i] : '.'); | |
390 | } | |
391 | _address += (_tupleLength * 2); | |
392 | ||
393 | // success | |
394 | *tupleType = _tupleType; | |
395 | *tupleLength = _tupleLength; | |
396 | *address = _address; | |
397 | return 0; | |
398 | } | |
399 | ||
400 | ||
401 | /** | |
402 | * Parse attribute memory of a CAM module, extracting Config register, and checking | |
403 | * it is a DVB CAM module. | |
404 | * | |
405 | * @param ca CA instance. | |
406 | * @param slot Slot id. | |
407 | * | |
408 | * @return 0 on success, <0 on failure. | |
409 | */ | |
410 | static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot) | |
411 | { | |
412 | int address = 0; | |
413 | int tupleLength; | |
414 | int tupleType; | |
415 | u8 tuple[257]; | |
416 | char *dvb_str; | |
417 | int rasz; | |
418 | int status; | |
419 | int got_cftableentry = 0; | |
420 | int end_chain = 0; | |
421 | int i; | |
422 | u16 manfid = 0; | |
423 | u16 devid = 0; | |
424 | ||
425 | ||
426 | // CISTPL_DEVICE_0A | |
427 | if ((status = | |
428 | dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, &tupleLength, tuple)) < 0) | |
429 | return status; | |
430 | if (tupleType != 0x1D) | |
431 | return -EINVAL; | |
432 | ||
433 | ||
434 | ||
435 | // CISTPL_DEVICE_0C | |
436 | if ((status = | |
437 | dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, &tupleLength, tuple)) < 0) | |
438 | return status; | |
439 | if (tupleType != 0x1C) | |
440 | return -EINVAL; | |
441 | ||
442 | ||
443 | ||
444 | // CISTPL_VERS_1 | |
445 | if ((status = | |
446 | dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, &tupleLength, tuple)) < 0) | |
447 | return status; | |
448 | if (tupleType != 0x15) | |
449 | return -EINVAL; | |
450 | ||
451 | ||
452 | ||
453 | // CISTPL_MANFID | |
454 | if ((status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, | |
455 | &tupleLength, tuple)) < 0) | |
456 | return status; | |
457 | if (tupleType != 0x20) | |
458 | return -EINVAL; | |
459 | if (tupleLength != 4) | |
460 | return -EINVAL; | |
461 | manfid = (tuple[1] << 8) | tuple[0]; | |
462 | devid = (tuple[3] << 8) | tuple[2]; | |
463 | ||
464 | ||
465 | ||
466 | // CISTPL_CONFIG | |
467 | if ((status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, | |
468 | &tupleLength, tuple)) < 0) | |
469 | return status; | |
470 | if (tupleType != 0x1A) | |
471 | return -EINVAL; | |
472 | if (tupleLength < 3) | |
473 | return -EINVAL; | |
474 | ||
475 | /* extract the configbase */ | |
476 | rasz = tuple[0] & 3; | |
477 | if (tupleLength < (3 + rasz + 14)) | |
478 | return -EINVAL; | |
479 | ca->slot_info[slot].config_base = 0; | |
480 | for (i = 0; i < rasz + 1; i++) { | |
481 | ca->slot_info[slot].config_base |= (tuple[2 + i] << (8 * i)); | |
482 | } | |
483 | ||
484 | /* check it contains the correct DVB string */ | |
260f8d7c | 485 | dvb_str = findstr((char *)tuple, tupleLength, "DVB_CI_V", 8); |
1da177e4 LT |
486 | if (dvb_str == NULL) |
487 | return -EINVAL; | |
488 | if (tupleLength < ((dvb_str - (char *) tuple) + 12)) | |
489 | return -EINVAL; | |
490 | ||
491 | /* is it a version we support? */ | |
492 | if (strncmp(dvb_str + 8, "1.00", 4)) { | |
493 | printk("dvb_ca adapter %d: Unsupported DVB CAM module version %c%c%c%c\n", | |
494 | ca->dvbdev->adapter->num, dvb_str[8], dvb_str[9], dvb_str[10], dvb_str[11]); | |
495 | return -EINVAL; | |
496 | } | |
497 | ||
498 | /* process the CFTABLE_ENTRY tuples, and any after those */ | |
499 | while ((!end_chain) && (address < 0x1000)) { | |
500 | if ((status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, | |
afd1a0c9 | 501 | &tupleLength, tuple)) < 0) |
1da177e4 LT |
502 | return status; |
503 | switch (tupleType) { | |
504 | case 0x1B: // CISTPL_CFTABLE_ENTRY | |
505 | if (tupleLength < (2 + 11 + 17)) | |
506 | break; | |
507 | ||
508 | /* if we've already parsed one, just use it */ | |
509 | if (got_cftableentry) | |
510 | break; | |
511 | ||
512 | /* get the config option */ | |
513 | ca->slot_info[slot].config_option = tuple[0] & 0x3f; | |
514 | ||
515 | /* OK, check it contains the correct strings */ | |
260f8d7c OE |
516 | if ((findstr((char *)tuple, tupleLength, "DVB_HOST", 8) == NULL) || |
517 | (findstr((char *)tuple, tupleLength, "DVB_CI_MODULE", 13) == NULL)) | |
1da177e4 LT |
518 | break; |
519 | ||
520 | got_cftableentry = 1; | |
521 | break; | |
522 | ||
523 | case 0x14: // CISTPL_NO_LINK | |
524 | break; | |
525 | ||
526 | case 0xFF: // CISTPL_END | |
527 | end_chain = 1; | |
528 | break; | |
529 | ||
530 | default: /* Unknown tuple type - just skip this tuple and move to the next one */ | |
531 | dprintk("dvb_ca: Skipping unknown tuple type:0x%x length:0x%x\n", tupleType, | |
532 | tupleLength); | |
533 | break; | |
534 | } | |
535 | } | |
536 | ||
537 | if ((address > 0x1000) || (!got_cftableentry)) | |
538 | return -EINVAL; | |
539 | ||
540 | dprintk("Valid DVB CAM detected MANID:%x DEVID:%x CONFIGBASE:0x%x CONFIGOPTION:0x%x\n", | |
541 | manfid, devid, ca->slot_info[slot].config_base, ca->slot_info[slot].config_option); | |
542 | ||
543 | // success! | |
544 | return 0; | |
545 | } | |
546 | ||
547 | ||
548 | /** | |
549 | * Set CAM's configoption correctly. | |
550 | * | |
551 | * @param ca CA instance. | |
552 | * @param slot Slot containing the CAM. | |
553 | */ | |
554 | static int dvb_ca_en50221_set_configoption(struct dvb_ca_private *ca, int slot) | |
555 | { | |
556 | int configoption; | |
557 | ||
46b4f7c1 | 558 | dprintk("%s\n", __func__); |
1da177e4 LT |
559 | |
560 | /* set the config option */ | |
561 | ca->pub->write_attribute_mem(ca->pub, slot, | |
562 | ca->slot_info[slot].config_base, | |
563 | ca->slot_info[slot].config_option); | |
564 | ||
565 | /* check it */ | |
566 | configoption = ca->pub->read_attribute_mem(ca->pub, slot, ca->slot_info[slot].config_base); | |
567 | dprintk("Set configoption 0x%x, read configoption 0x%x\n", | |
568 | ca->slot_info[slot].config_option, configoption & 0x3f); | |
569 | ||
570 | /* fine! */ | |
571 | return 0; | |
572 | ||
573 | } | |
574 | ||
575 | ||
576 | /** | |
577 | * This function talks to an EN50221 CAM control interface. It reads a buffer of | |
578 | * data from the CAM. The data can either be stored in a supplied buffer, or | |
579 | * automatically be added to the slot's rx_buffer. | |
580 | * | |
581 | * @param ca CA instance. | |
582 | * @param slot Slot to read from. | |
583 | * @param ebuf If non-NULL, the data will be written to this buffer. If NULL, | |
584 | * the data will be added into the buffering system as a normal fragment. | |
585 | * @param ecount Size of ebuf. Ignored if ebuf is NULL. | |
586 | * | |
587 | * @return Number of bytes read, or < 0 on error | |
588 | */ | |
589 | static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, u8 * ebuf, int ecount) | |
590 | { | |
591 | int bytes_read; | |
592 | int status; | |
593 | u8 buf[HOST_LINK_BUF_SIZE]; | |
594 | int i; | |
595 | ||
46b4f7c1 | 596 | dprintk("%s\n", __func__); |
1da177e4 LT |
597 | |
598 | /* check if we have space for a link buf in the rx_buffer */ | |
599 | if (ebuf == NULL) { | |
600 | int buf_free; | |
601 | ||
1da177e4 | 602 | if (ca->slot_info[slot].rx_buffer.data == NULL) { |
1da177e4 LT |
603 | status = -EIO; |
604 | goto exit; | |
605 | } | |
606 | buf_free = dvb_ringbuffer_free(&ca->slot_info[slot].rx_buffer); | |
1da177e4 LT |
607 | |
608 | if (buf_free < (ca->slot_info[slot].link_buf_size + DVB_RINGBUFFER_PKTHDRSIZE)) { | |
609 | status = -EAGAIN; | |
610 | goto exit; | |
611 | } | |
612 | } | |
613 | ||
614 | /* check if there is data available */ | |
615 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) | |
616 | goto exit; | |
617 | if (!(status & STATUSREG_DA)) { | |
618 | /* no data */ | |
619 | status = 0; | |
620 | goto exit; | |
621 | } | |
622 | ||
623 | /* read the amount of data */ | |
624 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH)) < 0) | |
625 | goto exit; | |
626 | bytes_read = status << 8; | |
627 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW)) < 0) | |
628 | goto exit; | |
629 | bytes_read |= status; | |
630 | ||
631 | /* check it will fit */ | |
632 | if (ebuf == NULL) { | |
633 | if (bytes_read > ca->slot_info[slot].link_buf_size) { | |
634 | printk("dvb_ca adapter %d: CAM tried to send a buffer larger than the link buffer size (%i > %i)!\n", | |
635 | ca->dvbdev->adapter->num, bytes_read, ca->slot_info[slot].link_buf_size); | |
636 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
637 | status = -EIO; | |
638 | goto exit; | |
639 | } | |
640 | if (bytes_read < 2) { | |
641 | printk("dvb_ca adapter %d: CAM sent a buffer that was less than 2 bytes!\n", | |
642 | ca->dvbdev->adapter->num); | |
643 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
644 | status = -EIO; | |
645 | goto exit; | |
646 | } | |
647 | } else { | |
648 | if (bytes_read > ecount) { | |
649 | printk("dvb_ca adapter %d: CAM tried to send a buffer larger than the ecount size!\n", | |
650 | ca->dvbdev->adapter->num); | |
651 | status = -EIO; | |
652 | goto exit; | |
653 | } | |
654 | } | |
655 | ||
656 | /* fill the buffer */ | |
657 | for (i = 0; i < bytes_read; i++) { | |
658 | /* read byte and check */ | |
659 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_DATA)) < 0) | |
660 | goto exit; | |
661 | ||
662 | /* OK, store it in the buffer */ | |
663 | buf[i] = status; | |
664 | } | |
665 | ||
666 | /* check for read error (RE should now be 0) */ | |
667 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) | |
668 | goto exit; | |
669 | if (status & STATUSREG_RE) { | |
670 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
671 | status = -EIO; | |
672 | goto exit; | |
673 | } | |
674 | ||
675 | /* OK, add it to the receive buffer, or copy into external buffer if supplied */ | |
676 | if (ebuf == NULL) { | |
1da177e4 | 677 | if (ca->slot_info[slot].rx_buffer.data == NULL) { |
1da177e4 LT |
678 | status = -EIO; |
679 | goto exit; | |
680 | } | |
681 | dvb_ringbuffer_pkt_write(&ca->slot_info[slot].rx_buffer, buf, bytes_read); | |
1da177e4 LT |
682 | } else { |
683 | memcpy(ebuf, buf, bytes_read); | |
684 | } | |
685 | ||
686 | dprintk("Received CA packet for slot %i connection id 0x%x last_frag:%i size:0x%x\n", slot, | |
687 | buf[0], (buf[1] & 0x80) == 0, bytes_read); | |
688 | ||
689 | /* wake up readers when a last_fragment is received */ | |
690 | if ((buf[1] & 0x80) == 0x00) { | |
691 | wake_up_interruptible(&ca->wait_queue); | |
692 | } | |
693 | status = bytes_read; | |
694 | ||
695 | exit: | |
696 | return status; | |
697 | } | |
698 | ||
699 | ||
700 | /** | |
701 | * This function talks to an EN50221 CAM control interface. It writes a buffer of data | |
702 | * to a CAM. | |
703 | * | |
704 | * @param ca CA instance. | |
705 | * @param slot Slot to write to. | |
706 | * @param ebuf The data in this buffer is treated as a complete link-level packet to | |
707 | * be written. | |
708 | * @param count Size of ebuf. | |
709 | * | |
710 | * @return Number of bytes written, or < 0 on error. | |
711 | */ | |
712 | static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, u8 * buf, int bytes_write) | |
713 | { | |
714 | int status; | |
715 | int i; | |
716 | ||
46b4f7c1 | 717 | dprintk("%s\n", __func__); |
1da177e4 LT |
718 | |
719 | ||
d7e43844 | 720 | /* sanity check */ |
1da177e4 LT |
721 | if (bytes_write > ca->slot_info[slot].link_buf_size) |
722 | return -EINVAL; | |
723 | ||
d7e43844 MD |
724 | /* it is possible we are dealing with a single buffer implementation, |
725 | thus if there is data available for read or if there is even a read | |
726 | already in progress, we do nothing but awake the kernel thread to | |
727 | process the data if necessary. */ | |
1da177e4 LT |
728 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) |
729 | goto exitnowrite; | |
730 | if (status & (STATUSREG_DA | STATUSREG_RE)) { | |
d7e43844 MD |
731 | if (status & STATUSREG_DA) |
732 | dvb_ca_en50221_thread_wakeup(ca); | |
733 | ||
1da177e4 LT |
734 | status = -EAGAIN; |
735 | goto exitnowrite; | |
736 | } | |
737 | ||
738 | /* OK, set HC bit */ | |
739 | if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, | |
740 | IRQEN | CMDREG_HC)) != 0) | |
741 | goto exit; | |
742 | ||
743 | /* check if interface is still free */ | |
744 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) | |
745 | goto exit; | |
746 | if (!(status & STATUSREG_FR)) { | |
747 | /* it wasn't free => try again later */ | |
748 | status = -EAGAIN; | |
749 | goto exit; | |
750 | } | |
751 | ||
752 | /* send the amount of data */ | |
753 | if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH, bytes_write >> 8)) != 0) | |
754 | goto exit; | |
755 | if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW, | |
756 | bytes_write & 0xff)) != 0) | |
757 | goto exit; | |
758 | ||
759 | /* send the buffer */ | |
760 | for (i = 0; i < bytes_write; i++) { | |
761 | if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_DATA, buf[i])) != 0) | |
762 | goto exit; | |
763 | } | |
764 | ||
765 | /* check for write error (WE should now be 0) */ | |
766 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) | |
767 | goto exit; | |
768 | if (status & STATUSREG_WE) { | |
769 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
770 | status = -EIO; | |
771 | goto exit; | |
772 | } | |
773 | status = bytes_write; | |
774 | ||
775 | dprintk("Wrote CA packet for slot %i, connection id 0x%x last_frag:%i size:0x%x\n", slot, | |
776 | buf[0], (buf[1] & 0x80) == 0, bytes_write); | |
777 | ||
778 | exit: | |
779 | ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN); | |
780 | ||
781 | exitnowrite: | |
782 | return status; | |
783 | } | |
784 | EXPORT_SYMBOL(dvb_ca_en50221_camchange_irq); | |
785 | ||
786 | ||
787 | ||
788 | /* ******************************************************************************** */ | |
789 | /* EN50221 higher level functions */ | |
790 | ||
791 | ||
792 | /** | |
793 | * A CAM has been removed => shut it down. | |
794 | * | |
795 | * @param ca CA instance. | |
796 | * @param slot Slot to shut down. | |
797 | */ | |
798 | static int dvb_ca_en50221_slot_shutdown(struct dvb_ca_private *ca, int slot) | |
799 | { | |
46b4f7c1 | 800 | dprintk("%s\n", __func__); |
1da177e4 | 801 | |
1da177e4 LT |
802 | ca->pub->slot_shutdown(ca->pub, slot); |
803 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1da177e4 LT |
804 | |
805 | /* need to wake up all processes to check if they're now | |
806 | trying to write to a defunct CAM */ | |
807 | wake_up_interruptible(&ca->wait_queue); | |
808 | ||
809 | dprintk("Slot %i shutdown\n", slot); | |
810 | ||
811 | /* success */ | |
812 | return 0; | |
813 | } | |
814 | EXPORT_SYMBOL(dvb_ca_en50221_camready_irq); | |
815 | ||
816 | ||
817 | /** | |
818 | * A CAMCHANGE IRQ has occurred. | |
819 | * | |
820 | * @param ca CA instance. | |
821 | * @param slot Slot concerned. | |
822 | * @param change_type One of the DVB_CA_CAMCHANGE_* values. | |
823 | */ | |
824 | void dvb_ca_en50221_camchange_irq(struct dvb_ca_en50221 *pubca, int slot, int change_type) | |
825 | { | |
0c53c70f | 826 | struct dvb_ca_private *ca = pubca->private; |
1da177e4 LT |
827 | |
828 | dprintk("CAMCHANGE IRQ slot:%i change_type:%i\n", slot, change_type); | |
829 | ||
830 | switch (change_type) { | |
831 | case DVB_CA_EN50221_CAMCHANGE_REMOVED: | |
832 | case DVB_CA_EN50221_CAMCHANGE_INSERTED: | |
833 | break; | |
834 | ||
835 | default: | |
836 | return; | |
837 | } | |
838 | ||
839 | ca->slot_info[slot].camchange_type = change_type; | |
840 | atomic_inc(&ca->slot_info[slot].camchange_count); | |
841 | dvb_ca_en50221_thread_wakeup(ca); | |
842 | } | |
843 | EXPORT_SYMBOL(dvb_ca_en50221_frda_irq); | |
844 | ||
845 | ||
846 | /** | |
847 | * A CAMREADY IRQ has occurred. | |
848 | * | |
849 | * @param ca CA instance. | |
850 | * @param slot Slot concerned. | |
851 | */ | |
852 | void dvb_ca_en50221_camready_irq(struct dvb_ca_en50221 *pubca, int slot) | |
853 | { | |
0c53c70f | 854 | struct dvb_ca_private *ca = pubca->private; |
1da177e4 LT |
855 | |
856 | dprintk("CAMREADY IRQ slot:%i\n", slot); | |
857 | ||
858 | if (ca->slot_info[slot].slot_state == DVB_CA_SLOTSTATE_WAITREADY) { | |
859 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_VALIDATE; | |
860 | dvb_ca_en50221_thread_wakeup(ca); | |
861 | } | |
862 | } | |
863 | ||
864 | ||
865 | /** | |
866 | * An FR or DA IRQ has occurred. | |
867 | * | |
868 | * @param ca CA instance. | |
869 | * @param slot Slot concerned. | |
870 | */ | |
871 | void dvb_ca_en50221_frda_irq(struct dvb_ca_en50221 *pubca, int slot) | |
872 | { | |
0c53c70f | 873 | struct dvb_ca_private *ca = pubca->private; |
1da177e4 LT |
874 | int flags; |
875 | ||
876 | dprintk("FR/DA IRQ slot:%i\n", slot); | |
877 | ||
878 | switch (ca->slot_info[slot].slot_state) { | |
879 | case DVB_CA_SLOTSTATE_LINKINIT: | |
880 | flags = ca->pub->read_cam_control(pubca, slot, CTRLIF_STATUS); | |
881 | if (flags & STATUSREG_DA) { | |
882 | dprintk("CAM supports DA IRQ\n"); | |
883 | ca->slot_info[slot].da_irq_supported = 1; | |
884 | } | |
885 | break; | |
886 | ||
887 | case DVB_CA_SLOTSTATE_RUNNING: | |
888 | if (ca->open) | |
ded92846 | 889 | dvb_ca_en50221_thread_wakeup(ca); |
1da177e4 LT |
890 | break; |
891 | } | |
892 | } | |
893 | ||
894 | ||
895 | ||
896 | /* ******************************************************************************** */ | |
897 | /* EN50221 thread functions */ | |
898 | ||
899 | /** | |
900 | * Wake up the DVB CA thread | |
901 | * | |
902 | * @param ca CA instance. | |
903 | */ | |
904 | static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca) | |
905 | { | |
906 | ||
46b4f7c1 | 907 | dprintk("%s\n", __func__); |
1da177e4 LT |
908 | |
909 | ca->wakeup = 1; | |
910 | mb(); | |
9320874a | 911 | wake_up_process(ca->thread); |
1da177e4 LT |
912 | } |
913 | ||
1da177e4 LT |
914 | /** |
915 | * Update the delay used by the thread. | |
916 | * | |
917 | * @param ca CA instance. | |
918 | */ | |
919 | static void dvb_ca_en50221_thread_update_delay(struct dvb_ca_private *ca) | |
920 | { | |
921 | int delay; | |
922 | int curdelay = 100000000; | |
923 | int slot; | |
924 | ||
71a35fe2 RS |
925 | /* Beware of too high polling frequency, because one polling |
926 | * call might take several hundred milliseconds until timeout! | |
927 | */ | |
1da177e4 LT |
928 | for (slot = 0; slot < ca->slot_count; slot++) { |
929 | switch (ca->slot_info[slot].slot_state) { | |
930 | default: | |
931 | case DVB_CA_SLOTSTATE_NONE: | |
71a35fe2 RS |
932 | delay = HZ * 60; /* 60s */ |
933 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) | |
934 | delay = HZ * 5; /* 5s */ | |
935 | break; | |
1da177e4 | 936 | case DVB_CA_SLOTSTATE_INVALID: |
71a35fe2 RS |
937 | delay = HZ * 60; /* 60s */ |
938 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) | |
939 | delay = HZ / 10; /* 100ms */ | |
1da177e4 LT |
940 | break; |
941 | ||
942 | case DVB_CA_SLOTSTATE_UNINITIALISED: | |
943 | case DVB_CA_SLOTSTATE_WAITREADY: | |
944 | case DVB_CA_SLOTSTATE_VALIDATE: | |
945 | case DVB_CA_SLOTSTATE_WAITFR: | |
946 | case DVB_CA_SLOTSTATE_LINKINIT: | |
71a35fe2 | 947 | delay = HZ / 10; /* 100ms */ |
1da177e4 LT |
948 | break; |
949 | ||
950 | case DVB_CA_SLOTSTATE_RUNNING: | |
71a35fe2 RS |
951 | delay = HZ * 60; /* 60s */ |
952 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) | |
953 | delay = HZ / 10; /* 100ms */ | |
1da177e4 LT |
954 | if (ca->open) { |
955 | if ((!ca->slot_info[slot].da_irq_supported) || | |
71a35fe2 RS |
956 | (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_DA))) |
957 | delay = HZ / 10; /* 100ms */ | |
1da177e4 LT |
958 | } |
959 | break; | |
960 | } | |
961 | ||
962 | if (delay < curdelay) | |
963 | curdelay = delay; | |
964 | } | |
965 | ||
966 | ca->delay = curdelay; | |
967 | } | |
968 | ||
969 | ||
970 | ||
971 | /** | |
972 | * Kernel thread which monitors CA slots for CAM changes, and performs data transfers. | |
973 | */ | |
974 | static int dvb_ca_en50221_thread(void *data) | |
975 | { | |
0c53c70f | 976 | struct dvb_ca_private *ca = data; |
1da177e4 LT |
977 | int slot; |
978 | int flags; | |
979 | int status; | |
980 | int pktcount; | |
981 | void *rxbuf; | |
982 | ||
46b4f7c1 | 983 | dprintk("%s\n", __func__); |
1da177e4 | 984 | |
1da177e4 LT |
985 | /* choose the correct initial delay */ |
986 | dvb_ca_en50221_thread_update_delay(ca); | |
987 | ||
988 | /* main loop */ | |
9320874a | 989 | while (!kthread_should_stop()) { |
1da177e4 | 990 | /* sleep for a bit */ |
a39a8ed7 | 991 | if (!ca->wakeup) { |
9320874a CH |
992 | set_current_state(TASK_INTERRUPTIBLE); |
993 | schedule_timeout(ca->delay); | |
994 | if (kthread_should_stop()) | |
995 | return 0; | |
1da177e4 LT |
996 | } |
997 | ca->wakeup = 0; | |
998 | ||
999 | /* go through all the slots processing them */ | |
1000 | for (slot = 0; slot < ca->slot_count; slot++) { | |
1001 | ||
d7e43844 MD |
1002 | mutex_lock(&ca->slot_info[slot].slot_lock); |
1003 | ||
1da177e4 LT |
1004 | // check the cam status + deal with CAMCHANGEs |
1005 | while (dvb_ca_en50221_check_camstatus(ca, slot)) { | |
1006 | /* clear down an old CI slot if necessary */ | |
1007 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_NONE) | |
1008 | dvb_ca_en50221_slot_shutdown(ca, slot); | |
1009 | ||
1010 | /* if a CAM is NOW present, initialise it */ | |
1011 | if (ca->slot_info[slot].camchange_type == DVB_CA_EN50221_CAMCHANGE_INSERTED) { | |
1012 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_UNINITIALISED; | |
1013 | } | |
1014 | ||
1015 | /* we've handled one CAMCHANGE */ | |
1016 | dvb_ca_en50221_thread_update_delay(ca); | |
1017 | atomic_dec(&ca->slot_info[slot].camchange_count); | |
1018 | } | |
1019 | ||
1020 | // CAM state machine | |
1021 | switch (ca->slot_info[slot].slot_state) { | |
1022 | case DVB_CA_SLOTSTATE_NONE: | |
1023 | case DVB_CA_SLOTSTATE_INVALID: | |
1024 | // no action needed | |
1025 | break; | |
1026 | ||
1027 | case DVB_CA_SLOTSTATE_UNINITIALISED: | |
1028 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_WAITREADY; | |
1029 | ca->pub->slot_reset(ca->pub, slot); | |
1030 | ca->slot_info[slot].timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); | |
1031 | break; | |
1032 | ||
1033 | case DVB_CA_SLOTSTATE_WAITREADY: | |
1034 | if (time_after(jiffies, ca->slot_info[slot].timeout)) { | |
1035 | printk("dvb_ca adaptor %d: PC card did not respond :(\n", | |
1036 | ca->dvbdev->adapter->num); | |
1037 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1038 | dvb_ca_en50221_thread_update_delay(ca); | |
1039 | break; | |
1040 | } | |
1041 | // no other action needed; will automatically change state when ready | |
1042 | break; | |
1043 | ||
1044 | case DVB_CA_SLOTSTATE_VALIDATE: | |
5c1208ba AQ |
1045 | if (dvb_ca_en50221_parse_attributes(ca, slot) != 0) { |
1046 | /* we need this extra check for annoying interfaces like the budget-av */ | |
1047 | if ((!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) && | |
1048 | (ca->pub->poll_slot_status)) { | |
c6eb8eaf | 1049 | status = ca->pub->poll_slot_status(ca->pub, slot, 0); |
5c1208ba AQ |
1050 | if (!(status & DVB_CA_EN50221_POLL_CAM_PRESENT)) { |
1051 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1052 | dvb_ca_en50221_thread_update_delay(ca); | |
1053 | break; | |
1054 | } | |
1055 | } | |
1056 | ||
1da177e4 LT |
1057 | printk("dvb_ca adapter %d: Invalid PC card inserted :(\n", |
1058 | ca->dvbdev->adapter->num); | |
1059 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1060 | dvb_ca_en50221_thread_update_delay(ca); | |
1061 | break; | |
1062 | } | |
1063 | if (dvb_ca_en50221_set_configoption(ca, slot) != 0) { | |
1064 | printk("dvb_ca adapter %d: Unable to initialise CAM :(\n", | |
1065 | ca->dvbdev->adapter->num); | |
1066 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1067 | dvb_ca_en50221_thread_update_delay(ca); | |
1068 | break; | |
1069 | } | |
1070 | if (ca->pub->write_cam_control(ca->pub, slot, | |
1071 | CTRLIF_COMMAND, CMDREG_RS) != 0) { | |
1072 | printk("dvb_ca adapter %d: Unable to reset CAM IF\n", | |
1073 | ca->dvbdev->adapter->num); | |
1074 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1075 | dvb_ca_en50221_thread_update_delay(ca); | |
1076 | break; | |
1077 | } | |
1078 | dprintk("DVB CAM validated successfully\n"); | |
1079 | ||
1080 | ca->slot_info[slot].timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); | |
1081 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_WAITFR; | |
1082 | ca->wakeup = 1; | |
1083 | break; | |
1084 | ||
1085 | case DVB_CA_SLOTSTATE_WAITFR: | |
1086 | if (time_after(jiffies, ca->slot_info[slot].timeout)) { | |
1087 | printk("dvb_ca adapter %d: DVB CAM did not respond :(\n", | |
1088 | ca->dvbdev->adapter->num); | |
1089 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1090 | dvb_ca_en50221_thread_update_delay(ca); | |
1091 | break; | |
1092 | } | |
1093 | ||
1094 | flags = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); | |
1095 | if (flags & STATUSREG_FR) { | |
1096 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
1097 | ca->wakeup = 1; | |
1098 | } | |
1099 | break; | |
1100 | ||
1101 | case DVB_CA_SLOTSTATE_LINKINIT: | |
1102 | if (dvb_ca_en50221_link_init(ca, slot) != 0) { | |
5c1208ba AQ |
1103 | /* we need this extra check for annoying interfaces like the budget-av */ |
1104 | if ((!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) && | |
1105 | (ca->pub->poll_slot_status)) { | |
c6eb8eaf | 1106 | status = ca->pub->poll_slot_status(ca->pub, slot, 0); |
5c1208ba AQ |
1107 | if (!(status & DVB_CA_EN50221_POLL_CAM_PRESENT)) { |
1108 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1109 | dvb_ca_en50221_thread_update_delay(ca); | |
1110 | break; | |
1111 | } | |
1112 | } | |
1113 | ||
1da177e4 LT |
1114 | printk("dvb_ca adapter %d: DVB CAM link initialisation failed :(\n", ca->dvbdev->adapter->num); |
1115 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1116 | dvb_ca_en50221_thread_update_delay(ca); | |
1117 | break; | |
1118 | } | |
1119 | ||
ded92846 AQ |
1120 | if (ca->slot_info[slot].rx_buffer.data == NULL) { |
1121 | rxbuf = vmalloc(RX_BUFFER_SIZE); | |
1122 | if (rxbuf == NULL) { | |
1123 | printk("dvb_ca adapter %d: Unable to allocate CAM rx buffer :(\n", ca->dvbdev->adapter->num); | |
1124 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1125 | dvb_ca_en50221_thread_update_delay(ca); | |
1126 | break; | |
1127 | } | |
1128 | dvb_ringbuffer_init(&ca->slot_info[slot].rx_buffer, rxbuf, RX_BUFFER_SIZE); | |
1da177e4 | 1129 | } |
1da177e4 LT |
1130 | |
1131 | ca->pub->slot_ts_enable(ca->pub, slot); | |
1132 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_RUNNING; | |
1133 | dvb_ca_en50221_thread_update_delay(ca); | |
1134 | printk("dvb_ca adapter %d: DVB CAM detected and initialised successfully\n", ca->dvbdev->adapter->num); | |
1135 | break; | |
1136 | ||
1137 | case DVB_CA_SLOTSTATE_RUNNING: | |
1138 | if (!ca->open) | |
d7e43844 | 1139 | break; |
1da177e4 | 1140 | |
ded92846 | 1141 | // poll slots for data |
1da177e4 LT |
1142 | pktcount = 0; |
1143 | while ((status = dvb_ca_en50221_read_data(ca, slot, NULL, 0)) > 0) { | |
1144 | if (!ca->open) | |
1145 | break; | |
1146 | ||
1147 | /* if a CAMCHANGE occurred at some point, do not do any more processing of this slot */ | |
1148 | if (dvb_ca_en50221_check_camstatus(ca, slot)) { | |
1149 | // we dont want to sleep on the next iteration so we can handle the cam change | |
1150 | ca->wakeup = 1; | |
1151 | break; | |
1152 | } | |
1153 | ||
1154 | /* check if we've hit our limit this time */ | |
1155 | if (++pktcount >= MAX_RX_PACKETS_PER_ITERATION) { | |
1156 | // dont sleep; there is likely to be more data to read | |
1157 | ca->wakeup = 1; | |
1158 | break; | |
1159 | } | |
1160 | } | |
1161 | break; | |
1162 | } | |
d7e43844 MD |
1163 | |
1164 | mutex_unlock(&ca->slot_info[slot].slot_lock); | |
1da177e4 LT |
1165 | } |
1166 | } | |
1167 | ||
1da177e4 LT |
1168 | return 0; |
1169 | } | |
1170 | ||
1171 | ||
1172 | ||
1173 | /* ******************************************************************************** */ | |
1174 | /* EN50221 IO interface functions */ | |
1175 | ||
1176 | /** | |
1177 | * Real ioctl implementation. | |
1178 | * NOTE: CA_SEND_MSG/CA_GET_MSG ioctls have userspace buffers passed to them. | |
1179 | * | |
1180 | * @param inode Inode concerned. | |
1181 | * @param file File concerned. | |
1182 | * @param cmd IOCTL command. | |
1183 | * @param arg Associated argument. | |
1184 | * | |
1185 | * @return 0 on success, <0 on error. | |
1186 | */ | |
16ef8def | 1187 | static int dvb_ca_en50221_io_do_ioctl(struct file *file, |
1da177e4 LT |
1188 | unsigned int cmd, void *parg) |
1189 | { | |
0c53c70f JS |
1190 | struct dvb_device *dvbdev = file->private_data; |
1191 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1192 | int err = 0; |
1193 | int slot; | |
1194 | ||
46b4f7c1 | 1195 | dprintk("%s\n", __func__); |
1da177e4 | 1196 | |
30ad64b8 NS |
1197 | if (mutex_lock_interruptible(&ca->ioctl_mutex)) |
1198 | return -ERESTARTSYS; | |
1199 | ||
1da177e4 LT |
1200 | switch (cmd) { |
1201 | case CA_RESET: | |
1202 | for (slot = 0; slot < ca->slot_count; slot++) { | |
d7e43844 | 1203 | mutex_lock(&ca->slot_info[slot].slot_lock); |
1da177e4 LT |
1204 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_NONE) { |
1205 | dvb_ca_en50221_slot_shutdown(ca, slot); | |
1206 | if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE) | |
1207 | dvb_ca_en50221_camchange_irq(ca->pub, | |
1208 | slot, | |
1209 | DVB_CA_EN50221_CAMCHANGE_INSERTED); | |
1210 | } | |
d7e43844 | 1211 | mutex_unlock(&ca->slot_info[slot].slot_lock); |
1da177e4 LT |
1212 | } |
1213 | ca->next_read_slot = 0; | |
1214 | dvb_ca_en50221_thread_wakeup(ca); | |
1215 | break; | |
1216 | ||
1217 | case CA_GET_CAP: { | |
0c53c70f | 1218 | struct ca_caps *caps = parg; |
1da177e4 LT |
1219 | |
1220 | caps->slot_num = ca->slot_count; | |
1221 | caps->slot_type = CA_CI_LINK; | |
1222 | caps->descr_num = 0; | |
1223 | caps->descr_type = 0; | |
1224 | break; | |
1225 | } | |
1226 | ||
1227 | case CA_GET_SLOT_INFO: { | |
0c53c70f | 1228 | struct ca_slot_info *info = parg; |
1da177e4 | 1229 | |
c4fe29a3 DC |
1230 | if ((info->num > ca->slot_count) || (info->num < 0)) { |
1231 | err = -EINVAL; | |
1232 | goto out_unlock; | |
1233 | } | |
1da177e4 LT |
1234 | |
1235 | info->type = CA_CI_LINK; | |
1236 | info->flags = 0; | |
1237 | if ((ca->slot_info[info->num].slot_state != DVB_CA_SLOTSTATE_NONE) | |
1238 | && (ca->slot_info[info->num].slot_state != DVB_CA_SLOTSTATE_INVALID)) { | |
1239 | info->flags = CA_CI_MODULE_PRESENT; | |
1240 | } | |
1241 | if (ca->slot_info[info->num].slot_state == DVB_CA_SLOTSTATE_RUNNING) { | |
1242 | info->flags |= CA_CI_MODULE_READY; | |
1243 | } | |
1244 | break; | |
1245 | } | |
1246 | ||
1247 | default: | |
1248 | err = -EINVAL; | |
1249 | break; | |
1250 | } | |
1251 | ||
c4fe29a3 | 1252 | out_unlock: |
30ad64b8 | 1253 | mutex_unlock(&ca->ioctl_mutex); |
1da177e4 LT |
1254 | return err; |
1255 | } | |
1256 | ||
1257 | ||
1258 | /** | |
1259 | * Wrapper for ioctl implementation. | |
1260 | * | |
1261 | * @param inode Inode concerned. | |
1262 | * @param file File concerned. | |
1263 | * @param cmd IOCTL command. | |
1264 | * @param arg Associated argument. | |
1265 | * | |
1266 | * @return 0 on success, <0 on error. | |
1267 | */ | |
16ef8def AB |
1268 | static long dvb_ca_en50221_io_ioctl(struct file *file, |
1269 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1270 | { |
72024f1e | 1271 | return dvb_usercopy(file, cmd, arg, dvb_ca_en50221_io_do_ioctl); |
1da177e4 LT |
1272 | } |
1273 | ||
1274 | ||
1275 | /** | |
1276 | * Implementation of write() syscall. | |
1277 | * | |
1278 | * @param file File structure. | |
1279 | * @param buf Source buffer. | |
1280 | * @param count Size of source buffer. | |
1281 | * @param ppos Position in file (ignored). | |
1282 | * | |
1283 | * @return Number of bytes read, or <0 on error. | |
1284 | */ | |
1285 | static ssize_t dvb_ca_en50221_io_write(struct file *file, | |
1286 | const char __user * buf, size_t count, loff_t * ppos) | |
1287 | { | |
0c53c70f JS |
1288 | struct dvb_device *dvbdev = file->private_data; |
1289 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1290 | u8 slot, connection_id; |
1291 | int status; | |
260f8d7c | 1292 | u8 fragbuf[HOST_LINK_BUF_SIZE]; |
1da177e4 LT |
1293 | int fragpos = 0; |
1294 | int fraglen; | |
1295 | unsigned long timeout; | |
1296 | int written; | |
1297 | ||
46b4f7c1 | 1298 | dprintk("%s\n", __func__); |
1da177e4 LT |
1299 | |
1300 | /* Incoming packet has a 2 byte header. hdr[0] = slot_id, hdr[1] = connection_id */ | |
1301 | if (count < 2) | |
1302 | return -EINVAL; | |
1303 | ||
1304 | /* extract slot & connection id */ | |
1305 | if (copy_from_user(&slot, buf, 1)) | |
1306 | return -EFAULT; | |
1307 | if (copy_from_user(&connection_id, buf + 1, 1)) | |
1308 | return -EFAULT; | |
1309 | buf += 2; | |
1310 | count -= 2; | |
1311 | ||
1312 | /* check if the slot is actually running */ | |
1313 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_RUNNING) | |
1314 | return -EINVAL; | |
1315 | ||
1316 | /* fragment the packets & store in the buffer */ | |
1317 | while (fragpos < count) { | |
1318 | fraglen = ca->slot_info[slot].link_buf_size - 2; | |
624f0c18 MCC |
1319 | if (fraglen < 0) |
1320 | break; | |
1321 | if (fraglen > HOST_LINK_BUF_SIZE - 2) | |
1322 | fraglen = HOST_LINK_BUF_SIZE - 2; | |
1da177e4 LT |
1323 | if ((count - fragpos) < fraglen) |
1324 | fraglen = count - fragpos; | |
1325 | ||
1326 | fragbuf[0] = connection_id; | |
1327 | fragbuf[1] = ((fragpos + fraglen) < count) ? 0x80 : 0x00; | |
e252984c DC |
1328 | status = copy_from_user(fragbuf + 2, buf + fragpos, fraglen); |
1329 | if (status) { | |
1330 | status = -EFAULT; | |
1da177e4 | 1331 | goto exit; |
e252984c | 1332 | } |
1da177e4 LT |
1333 | |
1334 | timeout = jiffies + HZ / 2; | |
1335 | written = 0; | |
1336 | while (!time_after(jiffies, timeout)) { | |
1337 | /* check the CAM hasn't been removed/reset in the meantime */ | |
1338 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_RUNNING) { | |
1339 | status = -EIO; | |
1340 | goto exit; | |
1341 | } | |
1342 | ||
d7e43844 | 1343 | mutex_lock(&ca->slot_info[slot].slot_lock); |
1da177e4 | 1344 | status = dvb_ca_en50221_write_data(ca, slot, fragbuf, fraglen + 2); |
d7e43844 | 1345 | mutex_unlock(&ca->slot_info[slot].slot_lock); |
1da177e4 LT |
1346 | if (status == (fraglen + 2)) { |
1347 | written = 1; | |
1348 | break; | |
1349 | } | |
1350 | if (status != -EAGAIN) | |
1351 | goto exit; | |
1352 | ||
1353 | msleep(1); | |
1354 | } | |
1355 | if (!written) { | |
1356 | status = -EIO; | |
1357 | goto exit; | |
1358 | } | |
1359 | ||
1360 | fragpos += fraglen; | |
1361 | } | |
1362 | status = count + 2; | |
1363 | ||
1364 | exit: | |
1365 | return status; | |
1366 | } | |
1367 | ||
1368 | ||
1369 | /** | |
1370 | * Condition for waking up in dvb_ca_en50221_io_read_condition | |
1371 | */ | |
ded92846 AQ |
1372 | static int dvb_ca_en50221_io_read_condition(struct dvb_ca_private *ca, |
1373 | int *result, int *_slot) | |
1da177e4 LT |
1374 | { |
1375 | int slot; | |
1376 | int slot_count = 0; | |
1377 | int idx; | |
ded92846 | 1378 | size_t fraglen; |
1da177e4 LT |
1379 | int connection_id = -1; |
1380 | int found = 0; | |
1381 | u8 hdr[2]; | |
1382 | ||
1383 | slot = ca->next_read_slot; | |
1384 | while ((slot_count < ca->slot_count) && (!found)) { | |
1385 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_RUNNING) | |
1386 | goto nextslot; | |
1387 | ||
1da177e4 | 1388 | if (ca->slot_info[slot].rx_buffer.data == NULL) { |
1da177e4 LT |
1389 | return 0; |
1390 | } | |
1391 | ||
1392 | idx = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, -1, &fraglen); | |
1393 | while (idx != -1) { | |
b0ba0e3a | 1394 | dvb_ringbuffer_pkt_read(&ca->slot_info[slot].rx_buffer, idx, 0, hdr, 2); |
1da177e4 LT |
1395 | if (connection_id == -1) |
1396 | connection_id = hdr[0]; | |
1397 | if ((hdr[0] == connection_id) && ((hdr[1] & 0x80) == 0)) { | |
1398 | *_slot = slot; | |
1399 | found = 1; | |
1400 | break; | |
1401 | } | |
1402 | ||
1403 | idx = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, idx, &fraglen); | |
1404 | } | |
1405 | ||
ded92846 | 1406 | nextslot: |
1da177e4 LT |
1407 | slot = (slot + 1) % ca->slot_count; |
1408 | slot_count++; | |
1409 | } | |
1410 | ||
1411 | ca->next_read_slot = slot; | |
1412 | return found; | |
1413 | } | |
1414 | ||
1415 | ||
1416 | /** | |
1417 | * Implementation of read() syscall. | |
1418 | * | |
1419 | * @param file File structure. | |
1420 | * @param buf Destination buffer. | |
1421 | * @param count Size of destination buffer. | |
1422 | * @param ppos Position in file (ignored). | |
1423 | * | |
1424 | * @return Number of bytes read, or <0 on error. | |
1425 | */ | |
1426 | static ssize_t dvb_ca_en50221_io_read(struct file *file, char __user * buf, | |
1427 | size_t count, loff_t * ppos) | |
1428 | { | |
0c53c70f JS |
1429 | struct dvb_device *dvbdev = file->private_data; |
1430 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1431 | int status; |
1432 | int result = 0; | |
1433 | u8 hdr[2]; | |
1434 | int slot; | |
1435 | int connection_id = -1; | |
1436 | size_t idx, idx2; | |
1437 | int last_fragment = 0; | |
1438 | size_t fraglen; | |
1439 | int pktlen; | |
1440 | int dispose = 0; | |
1441 | ||
46b4f7c1 | 1442 | dprintk("%s\n", __func__); |
1da177e4 LT |
1443 | |
1444 | /* Outgoing packet has a 2 byte header. hdr[0] = slot_id, hdr[1] = connection_id */ | |
1445 | if (count < 2) | |
1446 | return -EINVAL; | |
1447 | ||
1448 | /* wait for some data */ | |
1449 | if ((status = dvb_ca_en50221_io_read_condition(ca, &result, &slot)) == 0) { | |
1450 | ||
1451 | /* if we're in nonblocking mode, exit immediately */ | |
1452 | if (file->f_flags & O_NONBLOCK) | |
1453 | return -EWOULDBLOCK; | |
1454 | ||
1455 | /* wait for some data */ | |
1456 | status = wait_event_interruptible(ca->wait_queue, | |
1457 | dvb_ca_en50221_io_read_condition | |
1458 | (ca, &result, &slot)); | |
1459 | } | |
1460 | if ((status < 0) || (result < 0)) { | |
1461 | if (result) | |
1462 | return result; | |
1463 | return status; | |
1464 | } | |
1465 | ||
1466 | idx = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, -1, &fraglen); | |
1467 | pktlen = 2; | |
1468 | do { | |
1469 | if (idx == -1) { | |
1470 | printk("dvb_ca adapter %d: BUG: read packet ended before last_fragment encountered\n", ca->dvbdev->adapter->num); | |
1471 | status = -EIO; | |
1472 | goto exit; | |
1473 | } | |
1474 | ||
b0ba0e3a | 1475 | dvb_ringbuffer_pkt_read(&ca->slot_info[slot].rx_buffer, idx, 0, hdr, 2); |
1da177e4 LT |
1476 | if (connection_id == -1) |
1477 | connection_id = hdr[0]; | |
1478 | if (hdr[0] == connection_id) { | |
1479 | if (pktlen < count) { | |
1480 | if ((pktlen + fraglen - 2) > count) { | |
1481 | fraglen = count - pktlen; | |
1482 | } else { | |
1483 | fraglen -= 2; | |
1484 | } | |
1485 | ||
b0ba0e3a AV |
1486 | if ((status = dvb_ringbuffer_pkt_read_user(&ca->slot_info[slot].rx_buffer, idx, 2, |
1487 | buf + pktlen, fraglen)) < 0) { | |
1da177e4 LT |
1488 | goto exit; |
1489 | } | |
1490 | pktlen += fraglen; | |
1491 | } | |
1492 | ||
1493 | if ((hdr[1] & 0x80) == 0) | |
1494 | last_fragment = 1; | |
1495 | dispose = 1; | |
1496 | } | |
1497 | ||
1498 | idx2 = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, idx, &fraglen); | |
1499 | if (dispose) | |
1500 | dvb_ringbuffer_pkt_dispose(&ca->slot_info[slot].rx_buffer, idx); | |
1501 | idx = idx2; | |
1502 | dispose = 0; | |
1503 | } while (!last_fragment); | |
1504 | ||
1505 | hdr[0] = slot; | |
1506 | hdr[1] = connection_id; | |
e252984c DC |
1507 | status = copy_to_user(buf, hdr, 2); |
1508 | if (status) { | |
1509 | status = -EFAULT; | |
1da177e4 | 1510 | goto exit; |
e252984c | 1511 | } |
1da177e4 LT |
1512 | status = pktlen; |
1513 | ||
ded92846 | 1514 | exit: |
1da177e4 LT |
1515 | return status; |
1516 | } | |
1517 | ||
1518 | ||
1519 | /** | |
1520 | * Implementation of file open syscall. | |
1521 | * | |
1522 | * @param inode Inode concerned. | |
1523 | * @param file File concerned. | |
1524 | * | |
1525 | * @return 0 on success, <0 on failure. | |
1526 | */ | |
1527 | static int dvb_ca_en50221_io_open(struct inode *inode, struct file *file) | |
1528 | { | |
0c53c70f JS |
1529 | struct dvb_device *dvbdev = file->private_data; |
1530 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1531 | int err; |
1532 | int i; | |
1533 | ||
46b4f7c1 | 1534 | dprintk("%s\n", __func__); |
1da177e4 LT |
1535 | |
1536 | if (!try_module_get(ca->pub->owner)) | |
1537 | return -EIO; | |
1538 | ||
1539 | err = dvb_generic_open(inode, file); | |
226835d7 MS |
1540 | if (err < 0) { |
1541 | module_put(ca->pub->owner); | |
1da177e4 | 1542 | return err; |
226835d7 | 1543 | } |
1da177e4 LT |
1544 | |
1545 | for (i = 0; i < ca->slot_count; i++) { | |
1546 | ||
1547 | if (ca->slot_info[i].slot_state == DVB_CA_SLOTSTATE_RUNNING) { | |
1da177e4 | 1548 | if (ca->slot_info[i].rx_buffer.data != NULL) { |
ded92846 AQ |
1549 | /* it is safe to call this here without locks because |
1550 | * ca->open == 0. Data is not read in this case */ | |
1da177e4 LT |
1551 | dvb_ringbuffer_flush(&ca->slot_info[i].rx_buffer); |
1552 | } | |
1da177e4 LT |
1553 | } |
1554 | } | |
1555 | ||
1556 | ca->open = 1; | |
1557 | dvb_ca_en50221_thread_update_delay(ca); | |
1558 | dvb_ca_en50221_thread_wakeup(ca); | |
1559 | ||
1560 | return 0; | |
1561 | } | |
1562 | ||
1563 | ||
1564 | /** | |
1565 | * Implementation of file close syscall. | |
1566 | * | |
1567 | * @param inode Inode concerned. | |
1568 | * @param file File concerned. | |
1569 | * | |
1570 | * @return 0 on success, <0 on failure. | |
1571 | */ | |
1572 | static int dvb_ca_en50221_io_release(struct inode *inode, struct file *file) | |
1573 | { | |
0c53c70f JS |
1574 | struct dvb_device *dvbdev = file->private_data; |
1575 | struct dvb_ca_private *ca = dvbdev->priv; | |
0c12c1bf | 1576 | int err; |
1da177e4 | 1577 | |
46b4f7c1 | 1578 | dprintk("%s\n", __func__); |
1da177e4 LT |
1579 | |
1580 | /* mark the CA device as closed */ | |
1581 | ca->open = 0; | |
1582 | dvb_ca_en50221_thread_update_delay(ca); | |
1583 | ||
1584 | err = dvb_generic_release(inode, file); | |
1585 | ||
1586 | module_put(ca->pub->owner); | |
1587 | ||
0c12c1bf | 1588 | return err; |
1da177e4 LT |
1589 | } |
1590 | ||
1591 | ||
1592 | /** | |
1593 | * Implementation of poll() syscall. | |
1594 | * | |
1595 | * @param file File concerned. | |
1596 | * @param wait poll wait table. | |
1597 | * | |
1598 | * @return Standard poll mask. | |
1599 | */ | |
1600 | static unsigned int dvb_ca_en50221_io_poll(struct file *file, poll_table * wait) | |
1601 | { | |
0c53c70f JS |
1602 | struct dvb_device *dvbdev = file->private_data; |
1603 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1604 | unsigned int mask = 0; |
1605 | int slot; | |
1606 | int result = 0; | |
1607 | ||
46b4f7c1 | 1608 | dprintk("%s\n", __func__); |
1da177e4 LT |
1609 | |
1610 | if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) { | |
1da177e4 LT |
1611 | mask |= POLLIN; |
1612 | } | |
1613 | ||
1614 | /* if there is something, return now */ | |
1615 | if (mask) | |
1616 | return mask; | |
1617 | ||
1618 | /* wait for something to happen */ | |
1619 | poll_wait(file, &ca->wait_queue, wait); | |
1620 | ||
1621 | if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) { | |
1da177e4 LT |
1622 | mask |= POLLIN; |
1623 | } | |
1624 | ||
1625 | return mask; | |
1626 | } | |
1627 | EXPORT_SYMBOL(dvb_ca_en50221_init); | |
1628 | ||
1629 | ||
784e29d2 | 1630 | static const struct file_operations dvb_ca_fops = { |
1da177e4 LT |
1631 | .owner = THIS_MODULE, |
1632 | .read = dvb_ca_en50221_io_read, | |
1633 | .write = dvb_ca_en50221_io_write, | |
16ef8def | 1634 | .unlocked_ioctl = dvb_ca_en50221_io_ioctl, |
1da177e4 LT |
1635 | .open = dvb_ca_en50221_io_open, |
1636 | .release = dvb_ca_en50221_io_release, | |
1637 | .poll = dvb_ca_en50221_io_poll, | |
6038f373 | 1638 | .llseek = noop_llseek, |
1da177e4 LT |
1639 | }; |
1640 | ||
738a1b1e | 1641 | static const struct dvb_device dvbdev_ca = { |
1da177e4 LT |
1642 | .priv = NULL, |
1643 | .users = 1, | |
1644 | .readers = 1, | |
1645 | .writers = 1, | |
738a1b1e | 1646 | #if defined(CONFIG_MEDIA_CONTROLLER_DVB) |
e4fd3bc5 | 1647 | .name = "dvb-ca-en50221", |
738a1b1e | 1648 | #endif |
1da177e4 LT |
1649 | .fops = &dvb_ca_fops, |
1650 | }; | |
1651 | ||
1da177e4 LT |
1652 | /* ******************************************************************************** */ |
1653 | /* Initialisation/shutdown functions */ | |
1654 | ||
1655 | ||
1656 | /** | |
1657 | * Initialise a new DVB CA EN50221 interface device. | |
1658 | * | |
1659 | * @param dvb_adapter DVB adapter to attach the new CA device to. | |
1660 | * @param ca The dvb_ca instance. | |
1661 | * @param flags Flags describing the CA device (DVB_CA_FLAG_*). | |
1662 | * @param slot_count Number of slots supported. | |
1663 | * | |
1664 | * @return 0 on success, nonzero on failure | |
1665 | */ | |
1666 | int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter, | |
1667 | struct dvb_ca_en50221 *pubca, int flags, int slot_count) | |
1668 | { | |
1669 | int ret; | |
1670 | struct dvb_ca_private *ca = NULL; | |
1671 | int i; | |
1672 | ||
46b4f7c1 | 1673 | dprintk("%s\n", __func__); |
1da177e4 LT |
1674 | |
1675 | if (slot_count < 1) | |
1676 | return -EINVAL; | |
1677 | ||
1678 | /* initialise the system data */ | |
7408187d | 1679 | if ((ca = kzalloc(sizeof(struct dvb_ca_private), GFP_KERNEL)) == NULL) { |
1da177e4 | 1680 | ret = -ENOMEM; |
a2bbf5d0 | 1681 | goto exit; |
1da177e4 | 1682 | } |
1da177e4 LT |
1683 | ca->pub = pubca; |
1684 | ca->flags = flags; | |
1685 | ca->slot_count = slot_count; | |
7408187d | 1686 | if ((ca->slot_info = kcalloc(slot_count, sizeof(struct dvb_ca_slot), GFP_KERNEL)) == NULL) { |
1da177e4 | 1687 | ret = -ENOMEM; |
a2bbf5d0 | 1688 | goto free_ca; |
1da177e4 | 1689 | } |
1da177e4 | 1690 | init_waitqueue_head(&ca->wait_queue); |
1da177e4 LT |
1691 | ca->open = 0; |
1692 | ca->wakeup = 0; | |
1693 | ca->next_read_slot = 0; | |
1694 | pubca->private = ca; | |
1695 | ||
1696 | /* register the DVB device */ | |
1697 | ret = dvb_register_device(dvb_adapter, &ca->dvbdev, &dvbdev_ca, ca, DVB_DEVICE_CA); | |
1698 | if (ret) | |
a2bbf5d0 | 1699 | goto free_slot_info; |
1da177e4 LT |
1700 | |
1701 | /* now initialise each slot */ | |
1702 | for (i = 0; i < slot_count; i++) { | |
1703 | memset(&ca->slot_info[i], 0, sizeof(struct dvb_ca_slot)); | |
1704 | ca->slot_info[i].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1705 | atomic_set(&ca->slot_info[i].camchange_count, 0); | |
1706 | ca->slot_info[i].camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; | |
d7e43844 | 1707 | mutex_init(&ca->slot_info[i].slot_lock); |
1da177e4 LT |
1708 | } |
1709 | ||
30ad64b8 NS |
1710 | mutex_init(&ca->ioctl_mutex); |
1711 | ||
1da177e4 LT |
1712 | if (signal_pending(current)) { |
1713 | ret = -EINTR; | |
a2bbf5d0 | 1714 | goto unregister_device; |
1da177e4 LT |
1715 | } |
1716 | mb(); | |
1717 | ||
1718 | /* create a kthread for monitoring this CA device */ | |
9320874a CH |
1719 | ca->thread = kthread_run(dvb_ca_en50221_thread, ca, "kdvb-ca-%i:%i", |
1720 | ca->dvbdev->adapter->num, ca->dvbdev->id); | |
1721 | if (IS_ERR(ca->thread)) { | |
1722 | ret = PTR_ERR(ca->thread); | |
1723 | printk("dvb_ca_init: failed to start kernel_thread (%d)\n", | |
1724 | ret); | |
a2bbf5d0 | 1725 | goto unregister_device; |
1da177e4 | 1726 | } |
1da177e4 LT |
1727 | return 0; |
1728 | ||
a2bbf5d0 ME |
1729 | unregister_device: |
1730 | dvb_unregister_device(ca->dvbdev); | |
1731 | free_slot_info: | |
1732 | kfree(ca->slot_info); | |
1733 | free_ca: | |
1734 | kfree(ca); | |
1735 | exit: | |
1da177e4 LT |
1736 | pubca->private = NULL; |
1737 | return ret; | |
1738 | } | |
1739 | EXPORT_SYMBOL(dvb_ca_en50221_release); | |
1740 | ||
1741 | ||
1742 | ||
1743 | /** | |
1744 | * Release a DVB CA EN50221 interface device. | |
1745 | * | |
1746 | * @param ca_dev The dvb_device_t instance for the CA device. | |
1747 | * @param ca The associated dvb_ca instance. | |
1748 | */ | |
1749 | void dvb_ca_en50221_release(struct dvb_ca_en50221 *pubca) | |
1750 | { | |
0c53c70f | 1751 | struct dvb_ca_private *ca = pubca->private; |
1da177e4 LT |
1752 | int i; |
1753 | ||
46b4f7c1 | 1754 | dprintk("%s\n", __func__); |
1da177e4 LT |
1755 | |
1756 | /* shutdown the thread if there was one */ | |
9320874a | 1757 | kthread_stop(ca->thread); |
1da177e4 LT |
1758 | |
1759 | for (i = 0; i < ca->slot_count; i++) { | |
1760 | dvb_ca_en50221_slot_shutdown(ca, i); | |
35dc0fef | 1761 | vfree(ca->slot_info[i].rx_buffer.data); |
1da177e4 LT |
1762 | } |
1763 | kfree(ca->slot_info); | |
1764 | dvb_unregister_device(ca->dvbdev); | |
1765 | kfree(ca); | |
1766 | pubca->private = NULL; | |
1767 | } |