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