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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. | |
bcb63314 SA |
24 | * To obtain the license, point your browser to |
25 | * http://www.gnu.org/copyleft/gpl.html | |
1da177e4 LT |
26 | */ |
27 | ||
b3ad24d2 MCC |
28 | #define pr_fmt(fmt) "dvb_ca_en50221: " fmt |
29 | ||
1da177e4 LT |
30 | #include <linux/errno.h> |
31 | #include <linux/slab.h> | |
32 | #include <linux/list.h> | |
33 | #include <linux/module.h> | |
1da177e4 LT |
34 | #include <linux/vmalloc.h> |
35 | #include <linux/delay.h> | |
ded92846 | 36 | #include <linux/spinlock.h> |
174cd4b1 | 37 | #include <linux/sched/signal.h> |
9320874a | 38 | #include <linux/kthread.h> |
1da177e4 LT |
39 | |
40 | #include "dvb_ca_en50221.h" | |
41 | #include "dvb_ringbuffer.h" | |
42 | ||
43 | static int dvb_ca_en50221_debug; | |
44 | ||
45 | module_param_named(cam_debug, dvb_ca_en50221_debug, int, 0644); | |
46 | MODULE_PARM_DESC(cam_debug, "enable verbose debug messages"); | |
47 | ||
b3ad24d2 MCC |
48 | #define dprintk(fmt, arg...) do { \ |
49 | if (dvb_ca_en50221_debug) \ | |
50 | printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg);\ | |
51 | } while (0) | |
1da177e4 | 52 | |
50b447d5 | 53 | #define INIT_TIMEOUT_SECS 10 |
1da177e4 LT |
54 | |
55 | #define HOST_LINK_BUF_SIZE 0x200 | |
56 | ||
57 | #define RX_BUFFER_SIZE 65535 | |
58 | ||
59 | #define MAX_RX_PACKETS_PER_ITERATION 10 | |
60 | ||
61 | #define CTRLIF_DATA 0 | |
62 | #define CTRLIF_COMMAND 1 | |
63 | #define CTRLIF_STATUS 1 | |
64 | #define CTRLIF_SIZE_LOW 2 | |
65 | #define CTRLIF_SIZE_HIGH 3 | |
66 | ||
67 | #define CMDREG_HC 1 /* Host control */ | |
68 | #define CMDREG_SW 2 /* Size write */ | |
69 | #define CMDREG_SR 4 /* Size read */ | |
70 | #define CMDREG_RS 8 /* Reset interface */ | |
71 | #define CMDREG_FRIE 0x40 /* Enable FR interrupt */ | |
72 | #define CMDREG_DAIE 0x80 /* Enable DA interrupt */ | |
73 | #define IRQEN (CMDREG_DAIE) | |
74 | ||
75 | #define STATUSREG_RE 1 /* read error */ | |
76 | #define STATUSREG_WE 2 /* write error */ | |
77 | #define STATUSREG_FR 0x40 /* module free */ | |
78 | #define STATUSREG_DA 0x80 /* data available */ | |
79 | #define STATUSREG_TXERR (STATUSREG_RE|STATUSREG_WE) /* general transfer error */ | |
80 | ||
81 | ||
82 | #define DVB_CA_SLOTSTATE_NONE 0 | |
83 | #define DVB_CA_SLOTSTATE_UNINITIALISED 1 | |
84 | #define DVB_CA_SLOTSTATE_RUNNING 2 | |
85 | #define DVB_CA_SLOTSTATE_INVALID 3 | |
86 | #define DVB_CA_SLOTSTATE_WAITREADY 4 | |
87 | #define DVB_CA_SLOTSTATE_VALIDATE 5 | |
88 | #define DVB_CA_SLOTSTATE_WAITFR 6 | |
89 | #define DVB_CA_SLOTSTATE_LINKINIT 7 | |
90 | ||
91 | ||
92 | /* Information on a CA slot */ | |
93 | struct dvb_ca_slot { | |
94 | ||
95 | /* current state of the CAM */ | |
96 | int slot_state; | |
97 | ||
d7e43844 MD |
98 | /* mutex used for serializing access to one CI slot */ |
99 | struct mutex slot_lock; | |
100 | ||
1da177e4 LT |
101 | /* Number of CAMCHANGES that have occurred since last processing */ |
102 | atomic_t camchange_count; | |
103 | ||
104 | /* Type of last CAMCHANGE */ | |
105 | int camchange_type; | |
106 | ||
107 | /* base address of CAM config */ | |
108 | u32 config_base; | |
109 | ||
110 | /* value to write into Config Control register */ | |
111 | u8 config_option; | |
112 | ||
113 | /* if 1, the CAM supports DA IRQs */ | |
114 | u8 da_irq_supported:1; | |
115 | ||
116 | /* size of the buffer to use when talking to the CAM */ | |
117 | int link_buf_size; | |
118 | ||
1da177e4 LT |
119 | /* buffer for incoming packets */ |
120 | struct dvb_ringbuffer rx_buffer; | |
121 | ||
122 | /* timer used during various states of the slot */ | |
123 | unsigned long timeout; | |
124 | }; | |
125 | ||
126 | /* Private CA-interface information */ | |
127 | struct dvb_ca_private { | |
da677fe1 | 128 | struct kref refcount; |
1da177e4 LT |
129 | |
130 | /* pointer back to the public data structure */ | |
131 | struct dvb_ca_en50221 *pub; | |
132 | ||
133 | /* the DVB device */ | |
134 | struct dvb_device *dvbdev; | |
135 | ||
136 | /* Flags describing the interface (DVB_CA_FLAG_*) */ | |
137 | u32 flags; | |
138 | ||
139 | /* number of slots supported by this CA interface */ | |
140 | unsigned int slot_count; | |
141 | ||
142 | /* information on each slot */ | |
143 | struct dvb_ca_slot *slot_info; | |
144 | ||
145 | /* wait queues for read() and write() operations */ | |
146 | wait_queue_head_t wait_queue; | |
147 | ||
148 | /* PID of the monitoring thread */ | |
9320874a | 149 | struct task_struct *thread; |
1da177e4 LT |
150 | |
151 | /* Flag indicating if the CA device is open */ | |
152 | unsigned int open:1; | |
153 | ||
154 | /* Flag indicating the thread should wake up now */ | |
155 | unsigned int wakeup:1; | |
156 | ||
157 | /* Delay the main thread should use */ | |
158 | unsigned long delay; | |
159 | ||
160 | /* Slot to start looking for data to read from in the next user-space read operation */ | |
161 | int next_read_slot; | |
30ad64b8 NS |
162 | |
163 | /* mutex serializing ioctls */ | |
164 | struct mutex ioctl_mutex; | |
1da177e4 LT |
165 | }; |
166 | ||
bd3df3c5 MK |
167 | static void dvb_ca_private_free(struct dvb_ca_private *ca) |
168 | { | |
169 | unsigned int i; | |
170 | ||
4d5030b6 | 171 | dvb_free_device(ca->dvbdev); |
bd3df3c5 MK |
172 | for (i = 0; i < ca->slot_count; i++) |
173 | vfree(ca->slot_info[i].rx_buffer.data); | |
174 | ||
175 | kfree(ca->slot_info); | |
176 | kfree(ca); | |
177 | } | |
178 | ||
da677fe1 MK |
179 | static void dvb_ca_private_release(struct kref *ref) |
180 | { | |
181 | struct dvb_ca_private *ca = container_of(ref, struct dvb_ca_private, refcount); | |
182 | dvb_ca_private_free(ca); | |
183 | } | |
184 | ||
185 | static void dvb_ca_private_get(struct dvb_ca_private *ca) | |
186 | { | |
187 | kref_get(&ca->refcount); | |
188 | } | |
189 | ||
190 | static void dvb_ca_private_put(struct dvb_ca_private *ca) | |
191 | { | |
192 | kref_put(&ca->refcount, dvb_ca_private_release); | |
193 | } | |
194 | ||
1da177e4 LT |
195 | static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca); |
196 | static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, u8 * ebuf, int ecount); | |
197 | static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, u8 * ebuf, int ecount); | |
198 | ||
199 | ||
200 | /** | |
201 | * Safely find needle in haystack. | |
202 | * | |
fbefb1a8 MCC |
203 | * @haystack: Buffer to look in. |
204 | * @hlen: Number of bytes in haystack. | |
205 | * @needle: Buffer to find. | |
206 | * @nlen: Number of bytes in needle. | |
1da177e4 LT |
207 | * @return Pointer into haystack needle was found at, or NULL if not found. |
208 | */ | |
260f8d7c | 209 | static char *findstr(char * haystack, int hlen, char * needle, int nlen) |
1da177e4 LT |
210 | { |
211 | int i; | |
212 | ||
213 | if (hlen < nlen) | |
214 | return NULL; | |
215 | ||
216 | for (i = 0; i <= hlen - nlen; i++) { | |
217 | if (!strncmp(haystack + i, needle, nlen)) | |
218 | return haystack + i; | |
219 | } | |
220 | ||
221 | return NULL; | |
222 | } | |
223 | ||
224 | ||
225 | ||
226 | /* ******************************************************************************** */ | |
227 | /* EN50221 physical interface functions */ | |
228 | ||
229 | ||
230 | /** | |
fbefb1a8 | 231 | * dvb_ca_en50221_check_camstatus - Check CAM status. |
1da177e4 LT |
232 | */ |
233 | static int dvb_ca_en50221_check_camstatus(struct dvb_ca_private *ca, int slot) | |
234 | { | |
235 | int slot_status; | |
236 | int cam_present_now; | |
237 | int cam_changed; | |
238 | ||
239 | /* IRQ mode */ | |
240 | if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE) { | |
241 | return (atomic_read(&ca->slot_info[slot].camchange_count) != 0); | |
242 | } | |
243 | ||
244 | /* poll mode */ | |
245 | slot_status = ca->pub->poll_slot_status(ca->pub, slot, ca->open); | |
246 | ||
247 | cam_present_now = (slot_status & DVB_CA_EN50221_POLL_CAM_PRESENT) ? 1 : 0; | |
248 | cam_changed = (slot_status & DVB_CA_EN50221_POLL_CAM_CHANGED) ? 1 : 0; | |
249 | if (!cam_changed) { | |
250 | int cam_present_old = (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_NONE); | |
251 | cam_changed = (cam_present_now != cam_present_old); | |
252 | } | |
253 | ||
254 | if (cam_changed) { | |
255 | if (!cam_present_now) { | |
256 | ca->slot_info[slot].camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; | |
257 | } else { | |
258 | ca->slot_info[slot].camchange_type = DVB_CA_EN50221_CAMCHANGE_INSERTED; | |
259 | } | |
260 | atomic_set(&ca->slot_info[slot].camchange_count, 1); | |
261 | } else { | |
262 | if ((ca->slot_info[slot].slot_state == DVB_CA_SLOTSTATE_WAITREADY) && | |
263 | (slot_status & DVB_CA_EN50221_POLL_CAM_READY)) { | |
264 | // move to validate state if reset is completed | |
265 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_VALIDATE; | |
266 | } | |
267 | } | |
268 | ||
269 | return cam_changed; | |
270 | } | |
271 | ||
272 | ||
273 | /** | |
fbefb1a8 MCC |
274 | * dvb_ca_en50221_wait_if_status - Wait for flags to become set on the STATUS |
275 | * register on a CAM interface, checking for errors and timeout. | |
1da177e4 | 276 | * |
fbefb1a8 MCC |
277 | * @ca: CA instance. |
278 | * @slot: Slot on interface. | |
279 | * @waitfor: Flags to wait for. | |
280 | * @timeout_ms: Timeout in milliseconds. | |
1da177e4 LT |
281 | * |
282 | * @return 0 on success, nonzero on error. | |
283 | */ | |
284 | static int dvb_ca_en50221_wait_if_status(struct dvb_ca_private *ca, int slot, | |
285 | u8 waitfor, int timeout_hz) | |
286 | { | |
287 | unsigned long timeout; | |
288 | unsigned long start; | |
289 | ||
46b4f7c1 | 290 | dprintk("%s\n", __func__); |
1da177e4 LT |
291 | |
292 | /* loop until timeout elapsed */ | |
293 | start = jiffies; | |
294 | timeout = jiffies + timeout_hz; | |
295 | while (1) { | |
296 | /* read the status and check for error */ | |
297 | int res = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); | |
298 | if (res < 0) | |
299 | return -EIO; | |
300 | ||
301 | /* if we got the flags, it was successful! */ | |
302 | if (res & waitfor) { | |
b3ad24d2 MCC |
303 | dprintk("%s succeeded timeout:%lu\n", |
304 | __func__, jiffies - start); | |
1da177e4 LT |
305 | return 0; |
306 | } | |
307 | ||
308 | /* check for timeout */ | |
309 | if (time_after(jiffies, timeout)) { | |
310 | break; | |
311 | } | |
312 | ||
313 | /* wait for a bit */ | |
314 | msleep(1); | |
315 | } | |
316 | ||
46b4f7c1 | 317 | dprintk("%s failed timeout:%lu\n", __func__, jiffies - start); |
1da177e4 LT |
318 | |
319 | /* if we get here, we've timed out */ | |
320 | return -ETIMEDOUT; | |
321 | } | |
322 | ||
323 | ||
324 | /** | |
fbefb1a8 | 325 | * dvb_ca_en50221_link_init - Initialise the link layer connection to a CAM. |
1da177e4 | 326 | * |
fbefb1a8 MCC |
327 | * @ca: CA instance. |
328 | * @slot: Slot id. | |
1da177e4 LT |
329 | * |
330 | * @return 0 on success, nonzero on failure. | |
331 | */ | |
332 | static int dvb_ca_en50221_link_init(struct dvb_ca_private *ca, int slot) | |
333 | { | |
334 | int ret; | |
335 | int buf_size; | |
336 | u8 buf[2]; | |
337 | ||
46b4f7c1 | 338 | dprintk("%s\n", __func__); |
1da177e4 LT |
339 | |
340 | /* we'll be determining these during this function */ | |
341 | ca->slot_info[slot].da_irq_supported = 0; | |
342 | ||
343 | /* set the host link buffer size temporarily. it will be overwritten with the | |
344 | * real negotiated size later. */ | |
345 | ca->slot_info[slot].link_buf_size = 2; | |
346 | ||
347 | /* read the buffer size from the CAM */ | |
348 | if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN | CMDREG_SR)) != 0) | |
349 | return ret; | |
350 | if ((ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_DA, HZ / 10)) != 0) | |
351 | return ret; | |
352 | if ((ret = dvb_ca_en50221_read_data(ca, slot, buf, 2)) != 2) | |
353 | return -EIO; | |
354 | if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN)) != 0) | |
355 | return ret; | |
356 | ||
357 | /* store it, and choose the minimum of our buffer and the CAM's buffer size */ | |
358 | buf_size = (buf[0] << 8) | buf[1]; | |
359 | if (buf_size > HOST_LINK_BUF_SIZE) | |
360 | buf_size = HOST_LINK_BUF_SIZE; | |
361 | ca->slot_info[slot].link_buf_size = buf_size; | |
362 | buf[0] = buf_size >> 8; | |
363 | buf[1] = buf_size & 0xff; | |
364 | dprintk("Chosen link buffer size of %i\n", buf_size); | |
365 | ||
366 | /* write the buffer size to the CAM */ | |
367 | if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN | CMDREG_SW)) != 0) | |
368 | return ret; | |
369 | if ((ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_FR, HZ / 10)) != 0) | |
370 | return ret; | |
371 | if ((ret = dvb_ca_en50221_write_data(ca, slot, buf, 2)) != 2) | |
372 | return -EIO; | |
373 | if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN)) != 0) | |
374 | return ret; | |
375 | ||
376 | /* success */ | |
377 | return 0; | |
378 | } | |
379 | ||
380 | /** | |
fbefb1a8 | 381 | * dvb_ca_en50221_read_tuple - Read a tuple from attribute memory. |
1da177e4 | 382 | * |
fbefb1a8 MCC |
383 | * @ca: CA instance. |
384 | * @slot: Slot id. | |
385 | * @address: Address to read from. Updated. | |
386 | * @tupleType: Tuple id byte. Updated. | |
387 | * @tupleLength: Tuple length. Updated. | |
388 | * @tuple: Dest buffer for tuple (must be 256 bytes). Updated. | |
1da177e4 LT |
389 | * |
390 | * @return 0 on success, nonzero on error. | |
391 | */ | |
392 | static int dvb_ca_en50221_read_tuple(struct dvb_ca_private *ca, int slot, | |
393 | int *address, int *tupleType, int *tupleLength, u8 * tuple) | |
394 | { | |
395 | int i; | |
396 | int _tupleType; | |
397 | int _tupleLength; | |
398 | int _address = *address; | |
399 | ||
400 | /* grab the next tuple length and type */ | |
401 | if ((_tupleType = ca->pub->read_attribute_mem(ca->pub, slot, _address)) < 0) | |
402 | return _tupleType; | |
403 | if (_tupleType == 0xff) { | |
404 | dprintk("END OF CHAIN TUPLE type:0x%x\n", _tupleType); | |
405 | *address += 2; | |
406 | *tupleType = _tupleType; | |
407 | *tupleLength = 0; | |
408 | return 0; | |
409 | } | |
410 | if ((_tupleLength = ca->pub->read_attribute_mem(ca->pub, slot, _address + 2)) < 0) | |
411 | return _tupleLength; | |
412 | _address += 4; | |
413 | ||
414 | dprintk("TUPLE type:0x%x length:%i\n", _tupleType, _tupleLength); | |
415 | ||
416 | /* read in the whole tuple */ | |
417 | for (i = 0; i < _tupleLength; i++) { | |
418 | tuple[i] = ca->pub->read_attribute_mem(ca->pub, slot, _address + (i * 2)); | |
419 | dprintk(" 0x%02x: 0x%02x %c\n", | |
420 | i, tuple[i] & 0xff, | |
421 | ((tuple[i] > 31) && (tuple[i] < 127)) ? tuple[i] : '.'); | |
422 | } | |
423 | _address += (_tupleLength * 2); | |
424 | ||
425 | // success | |
426 | *tupleType = _tupleType; | |
427 | *tupleLength = _tupleLength; | |
428 | *address = _address; | |
429 | return 0; | |
430 | } | |
431 | ||
432 | ||
433 | /** | |
fbefb1a8 MCC |
434 | * dvb_ca_en50221_parse_attributes - Parse attribute memory of a CAM module, |
435 | * extracting Config register, and checking it is a DVB CAM module. | |
1da177e4 | 436 | * |
fbefb1a8 MCC |
437 | * @ca: CA instance. |
438 | * @slot: Slot id. | |
1da177e4 LT |
439 | * |
440 | * @return 0 on success, <0 on failure. | |
441 | */ | |
442 | static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot) | |
443 | { | |
444 | int address = 0; | |
445 | int tupleLength; | |
446 | int tupleType; | |
447 | u8 tuple[257]; | |
448 | char *dvb_str; | |
449 | int rasz; | |
450 | int status; | |
451 | int got_cftableentry = 0; | |
452 | int end_chain = 0; | |
453 | int i; | |
454 | u16 manfid = 0; | |
455 | u16 devid = 0; | |
456 | ||
457 | ||
458 | // CISTPL_DEVICE_0A | |
459 | if ((status = | |
460 | dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, &tupleLength, tuple)) < 0) | |
461 | return status; | |
462 | if (tupleType != 0x1D) | |
463 | return -EINVAL; | |
464 | ||
465 | ||
466 | ||
467 | // CISTPL_DEVICE_0C | |
468 | if ((status = | |
469 | dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, &tupleLength, tuple)) < 0) | |
470 | return status; | |
471 | if (tupleType != 0x1C) | |
472 | return -EINVAL; | |
473 | ||
474 | ||
475 | ||
476 | // CISTPL_VERS_1 | |
477 | if ((status = | |
478 | dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, &tupleLength, tuple)) < 0) | |
479 | return status; | |
480 | if (tupleType != 0x15) | |
481 | return -EINVAL; | |
482 | ||
483 | ||
484 | ||
485 | // CISTPL_MANFID | |
486 | if ((status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, | |
487 | &tupleLength, tuple)) < 0) | |
488 | return status; | |
489 | if (tupleType != 0x20) | |
490 | return -EINVAL; | |
491 | if (tupleLength != 4) | |
492 | return -EINVAL; | |
493 | manfid = (tuple[1] << 8) | tuple[0]; | |
494 | devid = (tuple[3] << 8) | tuple[2]; | |
495 | ||
496 | ||
497 | ||
498 | // CISTPL_CONFIG | |
499 | if ((status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, | |
500 | &tupleLength, tuple)) < 0) | |
501 | return status; | |
502 | if (tupleType != 0x1A) | |
503 | return -EINVAL; | |
504 | if (tupleLength < 3) | |
505 | return -EINVAL; | |
506 | ||
507 | /* extract the configbase */ | |
508 | rasz = tuple[0] & 3; | |
509 | if (tupleLength < (3 + rasz + 14)) | |
510 | return -EINVAL; | |
511 | ca->slot_info[slot].config_base = 0; | |
512 | for (i = 0; i < rasz + 1; i++) { | |
513 | ca->slot_info[slot].config_base |= (tuple[2 + i] << (8 * i)); | |
514 | } | |
515 | ||
516 | /* check it contains the correct DVB string */ | |
260f8d7c | 517 | dvb_str = findstr((char *)tuple, tupleLength, "DVB_CI_V", 8); |
1da177e4 LT |
518 | if (dvb_str == NULL) |
519 | return -EINVAL; | |
520 | if (tupleLength < ((dvb_str - (char *) tuple) + 12)) | |
521 | return -EINVAL; | |
522 | ||
523 | /* is it a version we support? */ | |
524 | if (strncmp(dvb_str + 8, "1.00", 4)) { | |
b3ad24d2 MCC |
525 | pr_err("dvb_ca adapter %d: Unsupported DVB CAM module version %c%c%c%c\n", |
526 | ca->dvbdev->adapter->num, dvb_str[8], dvb_str[9], | |
527 | dvb_str[10], dvb_str[11]); | |
1da177e4 LT |
528 | return -EINVAL; |
529 | } | |
530 | ||
531 | /* process the CFTABLE_ENTRY tuples, and any after those */ | |
532 | while ((!end_chain) && (address < 0x1000)) { | |
533 | if ((status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, | |
afd1a0c9 | 534 | &tupleLength, tuple)) < 0) |
1da177e4 LT |
535 | return status; |
536 | switch (tupleType) { | |
537 | case 0x1B: // CISTPL_CFTABLE_ENTRY | |
538 | if (tupleLength < (2 + 11 + 17)) | |
539 | break; | |
540 | ||
541 | /* if we've already parsed one, just use it */ | |
542 | if (got_cftableentry) | |
543 | break; | |
544 | ||
545 | /* get the config option */ | |
546 | ca->slot_info[slot].config_option = tuple[0] & 0x3f; | |
547 | ||
548 | /* OK, check it contains the correct strings */ | |
260f8d7c OE |
549 | if ((findstr((char *)tuple, tupleLength, "DVB_HOST", 8) == NULL) || |
550 | (findstr((char *)tuple, tupleLength, "DVB_CI_MODULE", 13) == NULL)) | |
1da177e4 LT |
551 | break; |
552 | ||
553 | got_cftableentry = 1; | |
554 | break; | |
555 | ||
556 | case 0x14: // CISTPL_NO_LINK | |
557 | break; | |
558 | ||
559 | case 0xFF: // CISTPL_END | |
560 | end_chain = 1; | |
561 | break; | |
562 | ||
563 | default: /* Unknown tuple type - just skip this tuple and move to the next one */ | |
b3ad24d2 MCC |
564 | dprintk("dvb_ca: Skipping unknown tuple type:0x%x length:0x%x\n", |
565 | tupleType, tupleLength); | |
1da177e4 LT |
566 | break; |
567 | } | |
568 | } | |
569 | ||
570 | if ((address > 0x1000) || (!got_cftableentry)) | |
571 | return -EINVAL; | |
572 | ||
573 | dprintk("Valid DVB CAM detected MANID:%x DEVID:%x CONFIGBASE:0x%x CONFIGOPTION:0x%x\n", | |
b3ad24d2 MCC |
574 | manfid, devid, ca->slot_info[slot].config_base, |
575 | ca->slot_info[slot].config_option); | |
1da177e4 LT |
576 | |
577 | // success! | |
578 | return 0; | |
579 | } | |
580 | ||
581 | ||
582 | /** | |
fbefb1a8 | 583 | * dvb_ca_en50221_set_configoption - Set CAM's configoption correctly. |
1da177e4 | 584 | * |
fbefb1a8 MCC |
585 | * @ca: CA instance. |
586 | * @slot: Slot containing the CAM. | |
1da177e4 LT |
587 | */ |
588 | static int dvb_ca_en50221_set_configoption(struct dvb_ca_private *ca, int slot) | |
589 | { | |
590 | int configoption; | |
591 | ||
46b4f7c1 | 592 | dprintk("%s\n", __func__); |
1da177e4 LT |
593 | |
594 | /* set the config option */ | |
595 | ca->pub->write_attribute_mem(ca->pub, slot, | |
596 | ca->slot_info[slot].config_base, | |
597 | ca->slot_info[slot].config_option); | |
598 | ||
599 | /* check it */ | |
600 | configoption = ca->pub->read_attribute_mem(ca->pub, slot, ca->slot_info[slot].config_base); | |
601 | dprintk("Set configoption 0x%x, read configoption 0x%x\n", | |
602 | ca->slot_info[slot].config_option, configoption & 0x3f); | |
603 | ||
604 | /* fine! */ | |
605 | return 0; | |
606 | ||
607 | } | |
608 | ||
609 | ||
610 | /** | |
fbefb1a8 MCC |
611 | * dvb_ca_en50221_read_data - This function talks to an EN50221 CAM control |
612 | * interface. It reads a buffer of data from the CAM. The data can either | |
613 | * be stored in a supplied buffer, or automatically be added to the slot's | |
614 | * rx_buffer. | |
1da177e4 | 615 | * |
fbefb1a8 MCC |
616 | * @ca: CA instance. |
617 | * @slot: Slot to read from. | |
618 | * @ebuf: If non-NULL, the data will be written to this buffer. If NULL, | |
1da177e4 | 619 | * the data will be added into the buffering system as a normal fragment. |
fbefb1a8 | 620 | * @ecount: Size of ebuf. Ignored if ebuf is NULL. |
1da177e4 LT |
621 | * |
622 | * @return Number of bytes read, or < 0 on error | |
623 | */ | |
624 | static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, u8 * ebuf, int ecount) | |
625 | { | |
626 | int bytes_read; | |
627 | int status; | |
628 | u8 buf[HOST_LINK_BUF_SIZE]; | |
629 | int i; | |
630 | ||
46b4f7c1 | 631 | dprintk("%s\n", __func__); |
1da177e4 LT |
632 | |
633 | /* check if we have space for a link buf in the rx_buffer */ | |
634 | if (ebuf == NULL) { | |
635 | int buf_free; | |
636 | ||
1da177e4 | 637 | if (ca->slot_info[slot].rx_buffer.data == NULL) { |
1da177e4 LT |
638 | status = -EIO; |
639 | goto exit; | |
640 | } | |
641 | buf_free = dvb_ringbuffer_free(&ca->slot_info[slot].rx_buffer); | |
1da177e4 LT |
642 | |
643 | if (buf_free < (ca->slot_info[slot].link_buf_size + DVB_RINGBUFFER_PKTHDRSIZE)) { | |
644 | status = -EAGAIN; | |
645 | goto exit; | |
646 | } | |
647 | } | |
648 | ||
649 | /* check if there is data available */ | |
650 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) | |
651 | goto exit; | |
652 | if (!(status & STATUSREG_DA)) { | |
653 | /* no data */ | |
654 | status = 0; | |
655 | goto exit; | |
656 | } | |
657 | ||
658 | /* read the amount of data */ | |
659 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH)) < 0) | |
660 | goto exit; | |
661 | bytes_read = status << 8; | |
662 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW)) < 0) | |
663 | goto exit; | |
664 | bytes_read |= status; | |
665 | ||
666 | /* check it will fit */ | |
667 | if (ebuf == NULL) { | |
668 | if (bytes_read > ca->slot_info[slot].link_buf_size) { | |
b3ad24d2 MCC |
669 | pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the link buffer size (%i > %i)!\n", |
670 | ca->dvbdev->adapter->num, bytes_read, | |
671 | ca->slot_info[slot].link_buf_size); | |
1da177e4 LT |
672 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; |
673 | status = -EIO; | |
674 | goto exit; | |
675 | } | |
676 | if (bytes_read < 2) { | |
b3ad24d2 | 677 | pr_err("dvb_ca adapter %d: CAM sent a buffer that was less than 2 bytes!\n", |
1da177e4 LT |
678 | ca->dvbdev->adapter->num); |
679 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
680 | status = -EIO; | |
681 | goto exit; | |
682 | } | |
683 | } else { | |
684 | if (bytes_read > ecount) { | |
b3ad24d2 | 685 | pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the ecount size!\n", |
1da177e4 LT |
686 | ca->dvbdev->adapter->num); |
687 | status = -EIO; | |
688 | goto exit; | |
689 | } | |
690 | } | |
691 | ||
692 | /* fill the buffer */ | |
693 | for (i = 0; i < bytes_read; i++) { | |
694 | /* read byte and check */ | |
695 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_DATA)) < 0) | |
696 | goto exit; | |
697 | ||
698 | /* OK, store it in the buffer */ | |
699 | buf[i] = status; | |
700 | } | |
701 | ||
702 | /* check for read error (RE should now be 0) */ | |
703 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) | |
704 | goto exit; | |
705 | if (status & STATUSREG_RE) { | |
706 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
707 | status = -EIO; | |
708 | goto exit; | |
709 | } | |
710 | ||
711 | /* OK, add it to the receive buffer, or copy into external buffer if supplied */ | |
712 | if (ebuf == NULL) { | |
1da177e4 | 713 | if (ca->slot_info[slot].rx_buffer.data == NULL) { |
1da177e4 LT |
714 | status = -EIO; |
715 | goto exit; | |
716 | } | |
717 | dvb_ringbuffer_pkt_write(&ca->slot_info[slot].rx_buffer, buf, bytes_read); | |
1da177e4 LT |
718 | } else { |
719 | memcpy(ebuf, buf, bytes_read); | |
720 | } | |
721 | ||
722 | dprintk("Received CA packet for slot %i connection id 0x%x last_frag:%i size:0x%x\n", slot, | |
723 | buf[0], (buf[1] & 0x80) == 0, bytes_read); | |
724 | ||
725 | /* wake up readers when a last_fragment is received */ | |
726 | if ((buf[1] & 0x80) == 0x00) { | |
727 | wake_up_interruptible(&ca->wait_queue); | |
728 | } | |
729 | status = bytes_read; | |
730 | ||
731 | exit: | |
732 | return status; | |
733 | } | |
734 | ||
735 | ||
736 | /** | |
fbefb1a8 MCC |
737 | * dvb_ca_en50221_write_data - This function talks to an EN50221 CAM control |
738 | * interface. It writes a buffer of data to a CAM. | |
1da177e4 | 739 | * |
fbefb1a8 MCC |
740 | * @ca: CA instance. |
741 | * @slot: Slot to write to. | |
742 | * @ebuf: The data in this buffer is treated as a complete link-level packet to | |
1da177e4 | 743 | * be written. |
fbefb1a8 | 744 | * @count: Size of ebuf. |
1da177e4 LT |
745 | * |
746 | * @return Number of bytes written, or < 0 on error. | |
747 | */ | |
748 | static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, u8 * buf, int bytes_write) | |
749 | { | |
750 | int status; | |
751 | int i; | |
752 | ||
46b4f7c1 | 753 | dprintk("%s\n", __func__); |
1da177e4 LT |
754 | |
755 | ||
d7e43844 | 756 | /* sanity check */ |
1da177e4 LT |
757 | if (bytes_write > ca->slot_info[slot].link_buf_size) |
758 | return -EINVAL; | |
759 | ||
d7e43844 MD |
760 | /* it is possible we are dealing with a single buffer implementation, |
761 | thus if there is data available for read or if there is even a read | |
762 | already in progress, we do nothing but awake the kernel thread to | |
763 | process the data if necessary. */ | |
1da177e4 LT |
764 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) |
765 | goto exitnowrite; | |
766 | if (status & (STATUSREG_DA | STATUSREG_RE)) { | |
d7e43844 MD |
767 | if (status & STATUSREG_DA) |
768 | dvb_ca_en50221_thread_wakeup(ca); | |
769 | ||
1da177e4 LT |
770 | status = -EAGAIN; |
771 | goto exitnowrite; | |
772 | } | |
773 | ||
774 | /* OK, set HC bit */ | |
775 | if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, | |
776 | IRQEN | CMDREG_HC)) != 0) | |
777 | goto exit; | |
778 | ||
779 | /* check if interface is still free */ | |
780 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) | |
781 | goto exit; | |
782 | if (!(status & STATUSREG_FR)) { | |
783 | /* it wasn't free => try again later */ | |
784 | status = -EAGAIN; | |
785 | goto exit; | |
786 | } | |
787 | ||
788 | /* send the amount of data */ | |
789 | if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH, bytes_write >> 8)) != 0) | |
790 | goto exit; | |
791 | if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW, | |
792 | bytes_write & 0xff)) != 0) | |
793 | goto exit; | |
794 | ||
795 | /* send the buffer */ | |
796 | for (i = 0; i < bytes_write; i++) { | |
797 | if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_DATA, buf[i])) != 0) | |
798 | goto exit; | |
799 | } | |
800 | ||
801 | /* check for write error (WE should now be 0) */ | |
802 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) | |
803 | goto exit; | |
804 | if (status & STATUSREG_WE) { | |
805 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
806 | status = -EIO; | |
807 | goto exit; | |
808 | } | |
809 | status = bytes_write; | |
810 | ||
811 | dprintk("Wrote CA packet for slot %i, connection id 0x%x last_frag:%i size:0x%x\n", slot, | |
812 | buf[0], (buf[1] & 0x80) == 0, bytes_write); | |
813 | ||
814 | exit: | |
815 | ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN); | |
816 | ||
817 | exitnowrite: | |
818 | return status; | |
819 | } | |
820 | EXPORT_SYMBOL(dvb_ca_en50221_camchange_irq); | |
821 | ||
822 | ||
823 | ||
824 | /* ******************************************************************************** */ | |
825 | /* EN50221 higher level functions */ | |
826 | ||
827 | ||
828 | /** | |
fbefb1a8 | 829 | * dvb_ca_en50221_camready_irq - A CAM has been removed => shut it down. |
1da177e4 | 830 | * |
fbefb1a8 MCC |
831 | * @ca: CA instance. |
832 | * @slot: Slot to shut down. | |
1da177e4 LT |
833 | */ |
834 | static int dvb_ca_en50221_slot_shutdown(struct dvb_ca_private *ca, int slot) | |
835 | { | |
46b4f7c1 | 836 | dprintk("%s\n", __func__); |
1da177e4 | 837 | |
1da177e4 LT |
838 | ca->pub->slot_shutdown(ca->pub, slot); |
839 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1da177e4 LT |
840 | |
841 | /* need to wake up all processes to check if they're now | |
842 | trying to write to a defunct CAM */ | |
843 | wake_up_interruptible(&ca->wait_queue); | |
844 | ||
845 | dprintk("Slot %i shutdown\n", slot); | |
846 | ||
847 | /* success */ | |
848 | return 0; | |
849 | } | |
850 | EXPORT_SYMBOL(dvb_ca_en50221_camready_irq); | |
851 | ||
852 | ||
853 | /** | |
fbefb1a8 | 854 | * dvb_ca_en50221_camready_irq - A CAMCHANGE IRQ has occurred. |
1da177e4 | 855 | * |
fbefb1a8 MCC |
856 | * @ca: CA instance. |
857 | * @slot: Slot concerned. | |
858 | * @change_type: One of the DVB_CA_CAMCHANGE_* values. | |
1da177e4 LT |
859 | */ |
860 | void dvb_ca_en50221_camchange_irq(struct dvb_ca_en50221 *pubca, int slot, int change_type) | |
861 | { | |
0c53c70f | 862 | struct dvb_ca_private *ca = pubca->private; |
1da177e4 LT |
863 | |
864 | dprintk("CAMCHANGE IRQ slot:%i change_type:%i\n", slot, change_type); | |
865 | ||
866 | switch (change_type) { | |
867 | case DVB_CA_EN50221_CAMCHANGE_REMOVED: | |
868 | case DVB_CA_EN50221_CAMCHANGE_INSERTED: | |
869 | break; | |
870 | ||
871 | default: | |
872 | return; | |
873 | } | |
874 | ||
875 | ca->slot_info[slot].camchange_type = change_type; | |
876 | atomic_inc(&ca->slot_info[slot].camchange_count); | |
877 | dvb_ca_en50221_thread_wakeup(ca); | |
878 | } | |
879 | EXPORT_SYMBOL(dvb_ca_en50221_frda_irq); | |
880 | ||
881 | ||
882 | /** | |
fbefb1a8 | 883 | * dvb_ca_en50221_camready_irq - A CAMREADY IRQ has occurred. |
1da177e4 | 884 | * |
fbefb1a8 MCC |
885 | * @ca: CA instance. |
886 | * @slot: Slot concerned. | |
1da177e4 LT |
887 | */ |
888 | void dvb_ca_en50221_camready_irq(struct dvb_ca_en50221 *pubca, int slot) | |
889 | { | |
0c53c70f | 890 | struct dvb_ca_private *ca = pubca->private; |
1da177e4 LT |
891 | |
892 | dprintk("CAMREADY IRQ slot:%i\n", slot); | |
893 | ||
894 | if (ca->slot_info[slot].slot_state == DVB_CA_SLOTSTATE_WAITREADY) { | |
895 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_VALIDATE; | |
896 | dvb_ca_en50221_thread_wakeup(ca); | |
897 | } | |
898 | } | |
899 | ||
900 | ||
901 | /** | |
902 | * An FR or DA IRQ has occurred. | |
903 | * | |
fbefb1a8 MCC |
904 | * @ca: CA instance. |
905 | * @slot: Slot concerned. | |
1da177e4 LT |
906 | */ |
907 | void dvb_ca_en50221_frda_irq(struct dvb_ca_en50221 *pubca, int slot) | |
908 | { | |
0c53c70f | 909 | struct dvb_ca_private *ca = pubca->private; |
1da177e4 LT |
910 | int flags; |
911 | ||
912 | dprintk("FR/DA IRQ slot:%i\n", slot); | |
913 | ||
914 | switch (ca->slot_info[slot].slot_state) { | |
915 | case DVB_CA_SLOTSTATE_LINKINIT: | |
916 | flags = ca->pub->read_cam_control(pubca, slot, CTRLIF_STATUS); | |
917 | if (flags & STATUSREG_DA) { | |
918 | dprintk("CAM supports DA IRQ\n"); | |
919 | ca->slot_info[slot].da_irq_supported = 1; | |
920 | } | |
921 | break; | |
922 | ||
923 | case DVB_CA_SLOTSTATE_RUNNING: | |
924 | if (ca->open) | |
ded92846 | 925 | dvb_ca_en50221_thread_wakeup(ca); |
1da177e4 LT |
926 | break; |
927 | } | |
928 | } | |
929 | ||
930 | ||
931 | ||
932 | /* ******************************************************************************** */ | |
933 | /* EN50221 thread functions */ | |
934 | ||
935 | /** | |
936 | * Wake up the DVB CA thread | |
937 | * | |
fbefb1a8 | 938 | * @ca: CA instance. |
1da177e4 LT |
939 | */ |
940 | static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca) | |
941 | { | |
942 | ||
46b4f7c1 | 943 | dprintk("%s\n", __func__); |
1da177e4 LT |
944 | |
945 | ca->wakeup = 1; | |
946 | mb(); | |
9320874a | 947 | wake_up_process(ca->thread); |
1da177e4 LT |
948 | } |
949 | ||
1da177e4 LT |
950 | /** |
951 | * Update the delay used by the thread. | |
952 | * | |
fbefb1a8 | 953 | * @ca: CA instance. |
1da177e4 LT |
954 | */ |
955 | static void dvb_ca_en50221_thread_update_delay(struct dvb_ca_private *ca) | |
956 | { | |
957 | int delay; | |
958 | int curdelay = 100000000; | |
959 | int slot; | |
960 | ||
71a35fe2 RS |
961 | /* Beware of too high polling frequency, because one polling |
962 | * call might take several hundred milliseconds until timeout! | |
963 | */ | |
1da177e4 LT |
964 | for (slot = 0; slot < ca->slot_count; slot++) { |
965 | switch (ca->slot_info[slot].slot_state) { | |
966 | default: | |
967 | case DVB_CA_SLOTSTATE_NONE: | |
71a35fe2 RS |
968 | delay = HZ * 60; /* 60s */ |
969 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) | |
970 | delay = HZ * 5; /* 5s */ | |
971 | break; | |
1da177e4 | 972 | case DVB_CA_SLOTSTATE_INVALID: |
71a35fe2 RS |
973 | delay = HZ * 60; /* 60s */ |
974 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) | |
975 | delay = HZ / 10; /* 100ms */ | |
1da177e4 LT |
976 | break; |
977 | ||
978 | case DVB_CA_SLOTSTATE_UNINITIALISED: | |
979 | case DVB_CA_SLOTSTATE_WAITREADY: | |
980 | case DVB_CA_SLOTSTATE_VALIDATE: | |
981 | case DVB_CA_SLOTSTATE_WAITFR: | |
982 | case DVB_CA_SLOTSTATE_LINKINIT: | |
71a35fe2 | 983 | delay = HZ / 10; /* 100ms */ |
1da177e4 LT |
984 | break; |
985 | ||
986 | case DVB_CA_SLOTSTATE_RUNNING: | |
71a35fe2 RS |
987 | delay = HZ * 60; /* 60s */ |
988 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) | |
989 | delay = HZ / 10; /* 100ms */ | |
1da177e4 LT |
990 | if (ca->open) { |
991 | if ((!ca->slot_info[slot].da_irq_supported) || | |
71a35fe2 RS |
992 | (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_DA))) |
993 | delay = HZ / 10; /* 100ms */ | |
1da177e4 LT |
994 | } |
995 | break; | |
996 | } | |
997 | ||
998 | if (delay < curdelay) | |
999 | curdelay = delay; | |
1000 | } | |
1001 | ||
1002 | ca->delay = curdelay; | |
1003 | } | |
1004 | ||
1005 | ||
1006 | ||
1007 | /** | |
1008 | * Kernel thread which monitors CA slots for CAM changes, and performs data transfers. | |
1009 | */ | |
1010 | static int dvb_ca_en50221_thread(void *data) | |
1011 | { | |
0c53c70f | 1012 | struct dvb_ca_private *ca = data; |
1da177e4 LT |
1013 | int slot; |
1014 | int flags; | |
1015 | int status; | |
1016 | int pktcount; | |
1017 | void *rxbuf; | |
1018 | ||
46b4f7c1 | 1019 | dprintk("%s\n", __func__); |
1da177e4 | 1020 | |
1da177e4 LT |
1021 | /* choose the correct initial delay */ |
1022 | dvb_ca_en50221_thread_update_delay(ca); | |
1023 | ||
1024 | /* main loop */ | |
9320874a | 1025 | while (!kthread_should_stop()) { |
1da177e4 | 1026 | /* sleep for a bit */ |
a39a8ed7 | 1027 | if (!ca->wakeup) { |
9320874a CH |
1028 | set_current_state(TASK_INTERRUPTIBLE); |
1029 | schedule_timeout(ca->delay); | |
1030 | if (kthread_should_stop()) | |
1031 | return 0; | |
1da177e4 LT |
1032 | } |
1033 | ca->wakeup = 0; | |
1034 | ||
1035 | /* go through all the slots processing them */ | |
1036 | for (slot = 0; slot < ca->slot_count; slot++) { | |
1037 | ||
d7e43844 MD |
1038 | mutex_lock(&ca->slot_info[slot].slot_lock); |
1039 | ||
1da177e4 LT |
1040 | // check the cam status + deal with CAMCHANGEs |
1041 | while (dvb_ca_en50221_check_camstatus(ca, slot)) { | |
1042 | /* clear down an old CI slot if necessary */ | |
1043 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_NONE) | |
1044 | dvb_ca_en50221_slot_shutdown(ca, slot); | |
1045 | ||
1046 | /* if a CAM is NOW present, initialise it */ | |
1047 | if (ca->slot_info[slot].camchange_type == DVB_CA_EN50221_CAMCHANGE_INSERTED) { | |
1048 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_UNINITIALISED; | |
1049 | } | |
1050 | ||
1051 | /* we've handled one CAMCHANGE */ | |
1052 | dvb_ca_en50221_thread_update_delay(ca); | |
1053 | atomic_dec(&ca->slot_info[slot].camchange_count); | |
1054 | } | |
1055 | ||
1056 | // CAM state machine | |
1057 | switch (ca->slot_info[slot].slot_state) { | |
1058 | case DVB_CA_SLOTSTATE_NONE: | |
1059 | case DVB_CA_SLOTSTATE_INVALID: | |
1060 | // no action needed | |
1061 | break; | |
1062 | ||
1063 | case DVB_CA_SLOTSTATE_UNINITIALISED: | |
1064 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_WAITREADY; | |
1065 | ca->pub->slot_reset(ca->pub, slot); | |
1066 | ca->slot_info[slot].timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); | |
1067 | break; | |
1068 | ||
1069 | case DVB_CA_SLOTSTATE_WAITREADY: | |
1070 | if (time_after(jiffies, ca->slot_info[slot].timeout)) { | |
b3ad24d2 | 1071 | pr_err("dvb_ca adaptor %d: PC card did not respond :(\n", |
1da177e4 LT |
1072 | ca->dvbdev->adapter->num); |
1073 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1074 | dvb_ca_en50221_thread_update_delay(ca); | |
1075 | break; | |
1076 | } | |
1077 | // no other action needed; will automatically change state when ready | |
1078 | break; | |
1079 | ||
1080 | case DVB_CA_SLOTSTATE_VALIDATE: | |
5c1208ba AQ |
1081 | if (dvb_ca_en50221_parse_attributes(ca, slot) != 0) { |
1082 | /* we need this extra check for annoying interfaces like the budget-av */ | |
1083 | if ((!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) && | |
1084 | (ca->pub->poll_slot_status)) { | |
c6eb8eaf | 1085 | status = ca->pub->poll_slot_status(ca->pub, slot, 0); |
5c1208ba AQ |
1086 | if (!(status & DVB_CA_EN50221_POLL_CAM_PRESENT)) { |
1087 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1088 | dvb_ca_en50221_thread_update_delay(ca); | |
1089 | break; | |
1090 | } | |
1091 | } | |
1092 | ||
b3ad24d2 | 1093 | pr_err("dvb_ca adapter %d: Invalid PC card inserted :(\n", |
1da177e4 LT |
1094 | ca->dvbdev->adapter->num); |
1095 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1096 | dvb_ca_en50221_thread_update_delay(ca); | |
1097 | break; | |
1098 | } | |
1099 | if (dvb_ca_en50221_set_configoption(ca, slot) != 0) { | |
b3ad24d2 | 1100 | pr_err("dvb_ca adapter %d: Unable to initialise CAM :(\n", |
1da177e4 LT |
1101 | ca->dvbdev->adapter->num); |
1102 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1103 | dvb_ca_en50221_thread_update_delay(ca); | |
1104 | break; | |
1105 | } | |
1106 | if (ca->pub->write_cam_control(ca->pub, slot, | |
1107 | CTRLIF_COMMAND, CMDREG_RS) != 0) { | |
b3ad24d2 | 1108 | pr_err("dvb_ca adapter %d: Unable to reset CAM IF\n", |
1da177e4 LT |
1109 | ca->dvbdev->adapter->num); |
1110 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1111 | dvb_ca_en50221_thread_update_delay(ca); | |
1112 | break; | |
1113 | } | |
1114 | dprintk("DVB CAM validated successfully\n"); | |
1115 | ||
1116 | ca->slot_info[slot].timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); | |
1117 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_WAITFR; | |
1118 | ca->wakeup = 1; | |
1119 | break; | |
1120 | ||
1121 | case DVB_CA_SLOTSTATE_WAITFR: | |
1122 | if (time_after(jiffies, ca->slot_info[slot].timeout)) { | |
b3ad24d2 | 1123 | pr_err("dvb_ca adapter %d: DVB CAM did not respond :(\n", |
1da177e4 LT |
1124 | ca->dvbdev->adapter->num); |
1125 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1126 | dvb_ca_en50221_thread_update_delay(ca); | |
1127 | break; | |
1128 | } | |
1129 | ||
1130 | flags = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); | |
1131 | if (flags & STATUSREG_FR) { | |
1132 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
1133 | ca->wakeup = 1; | |
1134 | } | |
1135 | break; | |
1136 | ||
1137 | case DVB_CA_SLOTSTATE_LINKINIT: | |
1138 | if (dvb_ca_en50221_link_init(ca, slot) != 0) { | |
5c1208ba AQ |
1139 | /* we need this extra check for annoying interfaces like the budget-av */ |
1140 | if ((!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) && | |
1141 | (ca->pub->poll_slot_status)) { | |
c6eb8eaf | 1142 | status = ca->pub->poll_slot_status(ca->pub, slot, 0); |
5c1208ba AQ |
1143 | if (!(status & DVB_CA_EN50221_POLL_CAM_PRESENT)) { |
1144 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1145 | dvb_ca_en50221_thread_update_delay(ca); | |
1146 | break; | |
1147 | } | |
1148 | } | |
1149 | ||
b3ad24d2 MCC |
1150 | pr_err("dvb_ca adapter %d: DVB CAM link initialisation failed :(\n", |
1151 | ca->dvbdev->adapter->num); | |
1da177e4 LT |
1152 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; |
1153 | dvb_ca_en50221_thread_update_delay(ca); | |
1154 | break; | |
1155 | } | |
1156 | ||
ded92846 AQ |
1157 | if (ca->slot_info[slot].rx_buffer.data == NULL) { |
1158 | rxbuf = vmalloc(RX_BUFFER_SIZE); | |
1159 | if (rxbuf == NULL) { | |
b3ad24d2 MCC |
1160 | pr_err("dvb_ca adapter %d: Unable to allocate CAM rx buffer :(\n", |
1161 | ca->dvbdev->adapter->num); | |
ded92846 AQ |
1162 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; |
1163 | dvb_ca_en50221_thread_update_delay(ca); | |
1164 | break; | |
1165 | } | |
1166 | dvb_ringbuffer_init(&ca->slot_info[slot].rx_buffer, rxbuf, RX_BUFFER_SIZE); | |
1da177e4 | 1167 | } |
1da177e4 LT |
1168 | |
1169 | ca->pub->slot_ts_enable(ca->pub, slot); | |
1170 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_RUNNING; | |
1171 | dvb_ca_en50221_thread_update_delay(ca); | |
b3ad24d2 MCC |
1172 | pr_err("dvb_ca adapter %d: DVB CAM detected and initialised successfully\n", |
1173 | ca->dvbdev->adapter->num); | |
1da177e4 LT |
1174 | break; |
1175 | ||
1176 | case DVB_CA_SLOTSTATE_RUNNING: | |
1177 | if (!ca->open) | |
d7e43844 | 1178 | break; |
1da177e4 | 1179 | |
ded92846 | 1180 | // poll slots for data |
1da177e4 LT |
1181 | pktcount = 0; |
1182 | while ((status = dvb_ca_en50221_read_data(ca, slot, NULL, 0)) > 0) { | |
1183 | if (!ca->open) | |
1184 | break; | |
1185 | ||
1186 | /* if a CAMCHANGE occurred at some point, do not do any more processing of this slot */ | |
1187 | if (dvb_ca_en50221_check_camstatus(ca, slot)) { | |
1188 | // we dont want to sleep on the next iteration so we can handle the cam change | |
1189 | ca->wakeup = 1; | |
1190 | break; | |
1191 | } | |
1192 | ||
1193 | /* check if we've hit our limit this time */ | |
1194 | if (++pktcount >= MAX_RX_PACKETS_PER_ITERATION) { | |
1195 | // dont sleep; there is likely to be more data to read | |
1196 | ca->wakeup = 1; | |
1197 | break; | |
1198 | } | |
1199 | } | |
1200 | break; | |
1201 | } | |
d7e43844 MD |
1202 | |
1203 | mutex_unlock(&ca->slot_info[slot].slot_lock); | |
1da177e4 LT |
1204 | } |
1205 | } | |
1206 | ||
1da177e4 LT |
1207 | return 0; |
1208 | } | |
1209 | ||
1210 | ||
1211 | ||
1212 | /* ******************************************************************************** */ | |
1213 | /* EN50221 IO interface functions */ | |
1214 | ||
1215 | /** | |
1216 | * Real ioctl implementation. | |
1217 | * NOTE: CA_SEND_MSG/CA_GET_MSG ioctls have userspace buffers passed to them. | |
1218 | * | |
fbefb1a8 MCC |
1219 | * @inode: Inode concerned. |
1220 | * @file: File concerned. | |
1221 | * @cmd: IOCTL command. | |
1222 | * @arg: Associated argument. | |
1da177e4 LT |
1223 | * |
1224 | * @return 0 on success, <0 on error. | |
1225 | */ | |
16ef8def | 1226 | static int dvb_ca_en50221_io_do_ioctl(struct file *file, |
1da177e4 LT |
1227 | unsigned int cmd, void *parg) |
1228 | { | |
0c53c70f JS |
1229 | struct dvb_device *dvbdev = file->private_data; |
1230 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1231 | int err = 0; |
1232 | int slot; | |
1233 | ||
46b4f7c1 | 1234 | dprintk("%s\n", __func__); |
1da177e4 | 1235 | |
30ad64b8 NS |
1236 | if (mutex_lock_interruptible(&ca->ioctl_mutex)) |
1237 | return -ERESTARTSYS; | |
1238 | ||
1da177e4 LT |
1239 | switch (cmd) { |
1240 | case CA_RESET: | |
1241 | for (slot = 0; slot < ca->slot_count; slot++) { | |
d7e43844 | 1242 | mutex_lock(&ca->slot_info[slot].slot_lock); |
1da177e4 LT |
1243 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_NONE) { |
1244 | dvb_ca_en50221_slot_shutdown(ca, slot); | |
1245 | if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE) | |
1246 | dvb_ca_en50221_camchange_irq(ca->pub, | |
1247 | slot, | |
1248 | DVB_CA_EN50221_CAMCHANGE_INSERTED); | |
1249 | } | |
d7e43844 | 1250 | mutex_unlock(&ca->slot_info[slot].slot_lock); |
1da177e4 LT |
1251 | } |
1252 | ca->next_read_slot = 0; | |
1253 | dvb_ca_en50221_thread_wakeup(ca); | |
1254 | break; | |
1255 | ||
1256 | case CA_GET_CAP: { | |
0c53c70f | 1257 | struct ca_caps *caps = parg; |
1da177e4 LT |
1258 | |
1259 | caps->slot_num = ca->slot_count; | |
1260 | caps->slot_type = CA_CI_LINK; | |
1261 | caps->descr_num = 0; | |
1262 | caps->descr_type = 0; | |
1263 | break; | |
1264 | } | |
1265 | ||
1266 | case CA_GET_SLOT_INFO: { | |
0c53c70f | 1267 | struct ca_slot_info *info = parg; |
1da177e4 | 1268 | |
c4fe29a3 DC |
1269 | if ((info->num > ca->slot_count) || (info->num < 0)) { |
1270 | err = -EINVAL; | |
1271 | goto out_unlock; | |
1272 | } | |
1da177e4 LT |
1273 | |
1274 | info->type = CA_CI_LINK; | |
1275 | info->flags = 0; | |
1276 | if ((ca->slot_info[info->num].slot_state != DVB_CA_SLOTSTATE_NONE) | |
1277 | && (ca->slot_info[info->num].slot_state != DVB_CA_SLOTSTATE_INVALID)) { | |
1278 | info->flags = CA_CI_MODULE_PRESENT; | |
1279 | } | |
1280 | if (ca->slot_info[info->num].slot_state == DVB_CA_SLOTSTATE_RUNNING) { | |
1281 | info->flags |= CA_CI_MODULE_READY; | |
1282 | } | |
1283 | break; | |
1284 | } | |
1285 | ||
1286 | default: | |
1287 | err = -EINVAL; | |
1288 | break; | |
1289 | } | |
1290 | ||
c4fe29a3 | 1291 | out_unlock: |
30ad64b8 | 1292 | mutex_unlock(&ca->ioctl_mutex); |
1da177e4 LT |
1293 | return err; |
1294 | } | |
1295 | ||
1296 | ||
1297 | /** | |
1298 | * Wrapper for ioctl implementation. | |
1299 | * | |
fbefb1a8 MCC |
1300 | * @inode: Inode concerned. |
1301 | * @file: File concerned. | |
1302 | * @cmd: IOCTL command. | |
1303 | * @arg: Associated argument. | |
1da177e4 LT |
1304 | * |
1305 | * @return 0 on success, <0 on error. | |
1306 | */ | |
16ef8def AB |
1307 | static long dvb_ca_en50221_io_ioctl(struct file *file, |
1308 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1309 | { |
72024f1e | 1310 | return dvb_usercopy(file, cmd, arg, dvb_ca_en50221_io_do_ioctl); |
1da177e4 LT |
1311 | } |
1312 | ||
1313 | ||
1314 | /** | |
1315 | * Implementation of write() syscall. | |
1316 | * | |
fbefb1a8 MCC |
1317 | * @file: File structure. |
1318 | * @buf: Source buffer. | |
1319 | * @count: Size of source buffer. | |
1320 | * @ppos: Position in file (ignored). | |
1da177e4 LT |
1321 | * |
1322 | * @return Number of bytes read, or <0 on error. | |
1323 | */ | |
1324 | static ssize_t dvb_ca_en50221_io_write(struct file *file, | |
1325 | const char __user * buf, size_t count, loff_t * ppos) | |
1326 | { | |
0c53c70f JS |
1327 | struct dvb_device *dvbdev = file->private_data; |
1328 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1329 | u8 slot, connection_id; |
1330 | int status; | |
260f8d7c | 1331 | u8 fragbuf[HOST_LINK_BUF_SIZE]; |
1da177e4 LT |
1332 | int fragpos = 0; |
1333 | int fraglen; | |
1334 | unsigned long timeout; | |
1335 | int written; | |
1336 | ||
46b4f7c1 | 1337 | dprintk("%s\n", __func__); |
1da177e4 LT |
1338 | |
1339 | /* Incoming packet has a 2 byte header. hdr[0] = slot_id, hdr[1] = connection_id */ | |
1340 | if (count < 2) | |
1341 | return -EINVAL; | |
1342 | ||
1343 | /* extract slot & connection id */ | |
1344 | if (copy_from_user(&slot, buf, 1)) | |
1345 | return -EFAULT; | |
1346 | if (copy_from_user(&connection_id, buf + 1, 1)) | |
1347 | return -EFAULT; | |
1348 | buf += 2; | |
1349 | count -= 2; | |
1350 | ||
1351 | /* check if the slot is actually running */ | |
1352 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_RUNNING) | |
1353 | return -EINVAL; | |
1354 | ||
1355 | /* fragment the packets & store in the buffer */ | |
1356 | while (fragpos < count) { | |
1357 | fraglen = ca->slot_info[slot].link_buf_size - 2; | |
624f0c18 MCC |
1358 | if (fraglen < 0) |
1359 | break; | |
1360 | if (fraglen > HOST_LINK_BUF_SIZE - 2) | |
1361 | fraglen = HOST_LINK_BUF_SIZE - 2; | |
1da177e4 LT |
1362 | if ((count - fragpos) < fraglen) |
1363 | fraglen = count - fragpos; | |
1364 | ||
1365 | fragbuf[0] = connection_id; | |
1366 | fragbuf[1] = ((fragpos + fraglen) < count) ? 0x80 : 0x00; | |
e252984c DC |
1367 | status = copy_from_user(fragbuf + 2, buf + fragpos, fraglen); |
1368 | if (status) { | |
1369 | status = -EFAULT; | |
1da177e4 | 1370 | goto exit; |
e252984c | 1371 | } |
1da177e4 LT |
1372 | |
1373 | timeout = jiffies + HZ / 2; | |
1374 | written = 0; | |
1375 | while (!time_after(jiffies, timeout)) { | |
1376 | /* check the CAM hasn't been removed/reset in the meantime */ | |
1377 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_RUNNING) { | |
1378 | status = -EIO; | |
1379 | goto exit; | |
1380 | } | |
1381 | ||
d7e43844 | 1382 | mutex_lock(&ca->slot_info[slot].slot_lock); |
1da177e4 | 1383 | status = dvb_ca_en50221_write_data(ca, slot, fragbuf, fraglen + 2); |
d7e43844 | 1384 | mutex_unlock(&ca->slot_info[slot].slot_lock); |
1da177e4 LT |
1385 | if (status == (fraglen + 2)) { |
1386 | written = 1; | |
1387 | break; | |
1388 | } | |
1389 | if (status != -EAGAIN) | |
1390 | goto exit; | |
1391 | ||
1392 | msleep(1); | |
1393 | } | |
1394 | if (!written) { | |
1395 | status = -EIO; | |
1396 | goto exit; | |
1397 | } | |
1398 | ||
1399 | fragpos += fraglen; | |
1400 | } | |
1401 | status = count + 2; | |
1402 | ||
1403 | exit: | |
1404 | return status; | |
1405 | } | |
1406 | ||
1407 | ||
1408 | /** | |
1409 | * Condition for waking up in dvb_ca_en50221_io_read_condition | |
1410 | */ | |
ded92846 AQ |
1411 | static int dvb_ca_en50221_io_read_condition(struct dvb_ca_private *ca, |
1412 | int *result, int *_slot) | |
1da177e4 LT |
1413 | { |
1414 | int slot; | |
1415 | int slot_count = 0; | |
1416 | int idx; | |
ded92846 | 1417 | size_t fraglen; |
1da177e4 LT |
1418 | int connection_id = -1; |
1419 | int found = 0; | |
1420 | u8 hdr[2]; | |
1421 | ||
1422 | slot = ca->next_read_slot; | |
1423 | while ((slot_count < ca->slot_count) && (!found)) { | |
1424 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_RUNNING) | |
1425 | goto nextslot; | |
1426 | ||
1da177e4 | 1427 | if (ca->slot_info[slot].rx_buffer.data == NULL) { |
1da177e4 LT |
1428 | return 0; |
1429 | } | |
1430 | ||
1431 | idx = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, -1, &fraglen); | |
1432 | while (idx != -1) { | |
b0ba0e3a | 1433 | dvb_ringbuffer_pkt_read(&ca->slot_info[slot].rx_buffer, idx, 0, hdr, 2); |
1da177e4 LT |
1434 | if (connection_id == -1) |
1435 | connection_id = hdr[0]; | |
1436 | if ((hdr[0] == connection_id) && ((hdr[1] & 0x80) == 0)) { | |
1437 | *_slot = slot; | |
1438 | found = 1; | |
1439 | break; | |
1440 | } | |
1441 | ||
1442 | idx = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, idx, &fraglen); | |
1443 | } | |
1444 | ||
ded92846 | 1445 | nextslot: |
1da177e4 LT |
1446 | slot = (slot + 1) % ca->slot_count; |
1447 | slot_count++; | |
1448 | } | |
1449 | ||
1450 | ca->next_read_slot = slot; | |
1451 | return found; | |
1452 | } | |
1453 | ||
1454 | ||
1455 | /** | |
1456 | * Implementation of read() syscall. | |
1457 | * | |
fbefb1a8 MCC |
1458 | * @file: File structure. |
1459 | * @buf: Destination buffer. | |
1460 | * @count: Size of destination buffer. | |
1461 | * @ppos: Position in file (ignored). | |
1da177e4 LT |
1462 | * |
1463 | * @return Number of bytes read, or <0 on error. | |
1464 | */ | |
1465 | static ssize_t dvb_ca_en50221_io_read(struct file *file, char __user * buf, | |
1466 | size_t count, loff_t * ppos) | |
1467 | { | |
0c53c70f JS |
1468 | struct dvb_device *dvbdev = file->private_data; |
1469 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1470 | int status; |
1471 | int result = 0; | |
1472 | u8 hdr[2]; | |
1473 | int slot; | |
1474 | int connection_id = -1; | |
1475 | size_t idx, idx2; | |
1476 | int last_fragment = 0; | |
1477 | size_t fraglen; | |
1478 | int pktlen; | |
1479 | int dispose = 0; | |
1480 | ||
46b4f7c1 | 1481 | dprintk("%s\n", __func__); |
1da177e4 LT |
1482 | |
1483 | /* Outgoing packet has a 2 byte header. hdr[0] = slot_id, hdr[1] = connection_id */ | |
1484 | if (count < 2) | |
1485 | return -EINVAL; | |
1486 | ||
1487 | /* wait for some data */ | |
1488 | if ((status = dvb_ca_en50221_io_read_condition(ca, &result, &slot)) == 0) { | |
1489 | ||
1490 | /* if we're in nonblocking mode, exit immediately */ | |
1491 | if (file->f_flags & O_NONBLOCK) | |
1492 | return -EWOULDBLOCK; | |
1493 | ||
1494 | /* wait for some data */ | |
1495 | status = wait_event_interruptible(ca->wait_queue, | |
1496 | dvb_ca_en50221_io_read_condition | |
1497 | (ca, &result, &slot)); | |
1498 | } | |
1499 | if ((status < 0) || (result < 0)) { | |
1500 | if (result) | |
1501 | return result; | |
1502 | return status; | |
1503 | } | |
1504 | ||
1505 | idx = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, -1, &fraglen); | |
1506 | pktlen = 2; | |
1507 | do { | |
1508 | if (idx == -1) { | |
b3ad24d2 MCC |
1509 | pr_err("dvb_ca adapter %d: BUG: read packet ended before last_fragment encountered\n", |
1510 | ca->dvbdev->adapter->num); | |
1da177e4 LT |
1511 | status = -EIO; |
1512 | goto exit; | |
1513 | } | |
1514 | ||
b0ba0e3a | 1515 | dvb_ringbuffer_pkt_read(&ca->slot_info[slot].rx_buffer, idx, 0, hdr, 2); |
1da177e4 LT |
1516 | if (connection_id == -1) |
1517 | connection_id = hdr[0]; | |
1518 | if (hdr[0] == connection_id) { | |
1519 | if (pktlen < count) { | |
1520 | if ((pktlen + fraglen - 2) > count) { | |
1521 | fraglen = count - pktlen; | |
1522 | } else { | |
1523 | fraglen -= 2; | |
1524 | } | |
1525 | ||
b0ba0e3a AV |
1526 | if ((status = dvb_ringbuffer_pkt_read_user(&ca->slot_info[slot].rx_buffer, idx, 2, |
1527 | buf + pktlen, fraglen)) < 0) { | |
1da177e4 LT |
1528 | goto exit; |
1529 | } | |
1530 | pktlen += fraglen; | |
1531 | } | |
1532 | ||
1533 | if ((hdr[1] & 0x80) == 0) | |
1534 | last_fragment = 1; | |
1535 | dispose = 1; | |
1536 | } | |
1537 | ||
1538 | idx2 = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, idx, &fraglen); | |
1539 | if (dispose) | |
1540 | dvb_ringbuffer_pkt_dispose(&ca->slot_info[slot].rx_buffer, idx); | |
1541 | idx = idx2; | |
1542 | dispose = 0; | |
1543 | } while (!last_fragment); | |
1544 | ||
1545 | hdr[0] = slot; | |
1546 | hdr[1] = connection_id; | |
e252984c DC |
1547 | status = copy_to_user(buf, hdr, 2); |
1548 | if (status) { | |
1549 | status = -EFAULT; | |
1da177e4 | 1550 | goto exit; |
e252984c | 1551 | } |
1da177e4 LT |
1552 | status = pktlen; |
1553 | ||
ded92846 | 1554 | exit: |
1da177e4 LT |
1555 | return status; |
1556 | } | |
1557 | ||
1558 | ||
1559 | /** | |
1560 | * Implementation of file open syscall. | |
1561 | * | |
fbefb1a8 MCC |
1562 | * @inode: Inode concerned. |
1563 | * @file: File concerned. | |
1da177e4 LT |
1564 | * |
1565 | * @return 0 on success, <0 on failure. | |
1566 | */ | |
1567 | static int dvb_ca_en50221_io_open(struct inode *inode, struct file *file) | |
1568 | { | |
0c53c70f JS |
1569 | struct dvb_device *dvbdev = file->private_data; |
1570 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1571 | int err; |
1572 | int i; | |
1573 | ||
46b4f7c1 | 1574 | dprintk("%s\n", __func__); |
1da177e4 LT |
1575 | |
1576 | if (!try_module_get(ca->pub->owner)) | |
1577 | return -EIO; | |
1578 | ||
1579 | err = dvb_generic_open(inode, file); | |
226835d7 MS |
1580 | if (err < 0) { |
1581 | module_put(ca->pub->owner); | |
1da177e4 | 1582 | return err; |
226835d7 | 1583 | } |
1da177e4 LT |
1584 | |
1585 | for (i = 0; i < ca->slot_count; i++) { | |
1586 | ||
1587 | if (ca->slot_info[i].slot_state == DVB_CA_SLOTSTATE_RUNNING) { | |
1da177e4 | 1588 | if (ca->slot_info[i].rx_buffer.data != NULL) { |
ded92846 AQ |
1589 | /* it is safe to call this here without locks because |
1590 | * ca->open == 0. Data is not read in this case */ | |
1da177e4 LT |
1591 | dvb_ringbuffer_flush(&ca->slot_info[i].rx_buffer); |
1592 | } | |
1da177e4 LT |
1593 | } |
1594 | } | |
1595 | ||
1596 | ca->open = 1; | |
1597 | dvb_ca_en50221_thread_update_delay(ca); | |
1598 | dvb_ca_en50221_thread_wakeup(ca); | |
1599 | ||
da677fe1 MK |
1600 | dvb_ca_private_get(ca); |
1601 | ||
1da177e4 LT |
1602 | return 0; |
1603 | } | |
1604 | ||
1605 | ||
1606 | /** | |
1607 | * Implementation of file close syscall. | |
1608 | * | |
fbefb1a8 MCC |
1609 | * @inode: Inode concerned. |
1610 | * @file: File concerned. | |
1da177e4 LT |
1611 | * |
1612 | * @return 0 on success, <0 on failure. | |
1613 | */ | |
1614 | static int dvb_ca_en50221_io_release(struct inode *inode, struct file *file) | |
1615 | { | |
0c53c70f JS |
1616 | struct dvb_device *dvbdev = file->private_data; |
1617 | struct dvb_ca_private *ca = dvbdev->priv; | |
0c12c1bf | 1618 | int err; |
1da177e4 | 1619 | |
46b4f7c1 | 1620 | dprintk("%s\n", __func__); |
1da177e4 LT |
1621 | |
1622 | /* mark the CA device as closed */ | |
1623 | ca->open = 0; | |
1624 | dvb_ca_en50221_thread_update_delay(ca); | |
1625 | ||
1626 | err = dvb_generic_release(inode, file); | |
1627 | ||
1628 | module_put(ca->pub->owner); | |
1629 | ||
da677fe1 MK |
1630 | dvb_ca_private_put(ca); |
1631 | ||
0c12c1bf | 1632 | return err; |
1da177e4 LT |
1633 | } |
1634 | ||
1635 | ||
1636 | /** | |
1637 | * Implementation of poll() syscall. | |
1638 | * | |
fbefb1a8 MCC |
1639 | * @file: File concerned. |
1640 | * @wait: poll wait table. | |
1da177e4 LT |
1641 | * |
1642 | * @return Standard poll mask. | |
1643 | */ | |
1644 | static unsigned int dvb_ca_en50221_io_poll(struct file *file, poll_table * wait) | |
1645 | { | |
0c53c70f JS |
1646 | struct dvb_device *dvbdev = file->private_data; |
1647 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1648 | unsigned int mask = 0; |
1649 | int slot; | |
1650 | int result = 0; | |
1651 | ||
46b4f7c1 | 1652 | dprintk("%s\n", __func__); |
1da177e4 LT |
1653 | |
1654 | if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) { | |
1da177e4 LT |
1655 | mask |= POLLIN; |
1656 | } | |
1657 | ||
1658 | /* if there is something, return now */ | |
1659 | if (mask) | |
1660 | return mask; | |
1661 | ||
1662 | /* wait for something to happen */ | |
1663 | poll_wait(file, &ca->wait_queue, wait); | |
1664 | ||
1665 | if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) { | |
1da177e4 LT |
1666 | mask |= POLLIN; |
1667 | } | |
1668 | ||
1669 | return mask; | |
1670 | } | |
1671 | EXPORT_SYMBOL(dvb_ca_en50221_init); | |
1672 | ||
1673 | ||
784e29d2 | 1674 | static const struct file_operations dvb_ca_fops = { |
1da177e4 LT |
1675 | .owner = THIS_MODULE, |
1676 | .read = dvb_ca_en50221_io_read, | |
1677 | .write = dvb_ca_en50221_io_write, | |
16ef8def | 1678 | .unlocked_ioctl = dvb_ca_en50221_io_ioctl, |
1da177e4 LT |
1679 | .open = dvb_ca_en50221_io_open, |
1680 | .release = dvb_ca_en50221_io_release, | |
1681 | .poll = dvb_ca_en50221_io_poll, | |
6038f373 | 1682 | .llseek = noop_llseek, |
1da177e4 LT |
1683 | }; |
1684 | ||
738a1b1e | 1685 | static const struct dvb_device dvbdev_ca = { |
1da177e4 LT |
1686 | .priv = NULL, |
1687 | .users = 1, | |
1688 | .readers = 1, | |
1689 | .writers = 1, | |
738a1b1e | 1690 | #if defined(CONFIG_MEDIA_CONTROLLER_DVB) |
e4fd3bc5 | 1691 | .name = "dvb-ca-en50221", |
738a1b1e | 1692 | #endif |
1da177e4 LT |
1693 | .fops = &dvb_ca_fops, |
1694 | }; | |
1695 | ||
1da177e4 LT |
1696 | /* ******************************************************************************** */ |
1697 | /* Initialisation/shutdown functions */ | |
1698 | ||
1699 | ||
1700 | /** | |
1701 | * Initialise a new DVB CA EN50221 interface device. | |
1702 | * | |
fbefb1a8 MCC |
1703 | * @dvb_adapter: DVB adapter to attach the new CA device to. |
1704 | * @ca: The dvb_ca instance. | |
1705 | * @flags: Flags describing the CA device (DVB_CA_FLAG_*). | |
1706 | * @slot_count: Number of slots supported. | |
1da177e4 LT |
1707 | * |
1708 | * @return 0 on success, nonzero on failure | |
1709 | */ | |
1710 | int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter, | |
1711 | struct dvb_ca_en50221 *pubca, int flags, int slot_count) | |
1712 | { | |
1713 | int ret; | |
1714 | struct dvb_ca_private *ca = NULL; | |
1715 | int i; | |
1716 | ||
46b4f7c1 | 1717 | dprintk("%s\n", __func__); |
1da177e4 LT |
1718 | |
1719 | if (slot_count < 1) | |
1720 | return -EINVAL; | |
1721 | ||
1722 | /* initialise the system data */ | |
7408187d | 1723 | if ((ca = kzalloc(sizeof(struct dvb_ca_private), GFP_KERNEL)) == NULL) { |
1da177e4 | 1724 | ret = -ENOMEM; |
a2bbf5d0 | 1725 | goto exit; |
1da177e4 | 1726 | } |
da677fe1 | 1727 | kref_init(&ca->refcount); |
1da177e4 LT |
1728 | ca->pub = pubca; |
1729 | ca->flags = flags; | |
1730 | ca->slot_count = slot_count; | |
7408187d | 1731 | if ((ca->slot_info = kcalloc(slot_count, sizeof(struct dvb_ca_slot), GFP_KERNEL)) == NULL) { |
1da177e4 | 1732 | ret = -ENOMEM; |
a2bbf5d0 | 1733 | goto free_ca; |
1da177e4 | 1734 | } |
1da177e4 | 1735 | init_waitqueue_head(&ca->wait_queue); |
1da177e4 LT |
1736 | ca->open = 0; |
1737 | ca->wakeup = 0; | |
1738 | ca->next_read_slot = 0; | |
1739 | pubca->private = ca; | |
1740 | ||
1741 | /* register the DVB device */ | |
df2f94e5 | 1742 | ret = dvb_register_device(dvb_adapter, &ca->dvbdev, &dvbdev_ca, ca, DVB_DEVICE_CA, 0); |
1da177e4 | 1743 | if (ret) |
a2bbf5d0 | 1744 | goto free_slot_info; |
1da177e4 LT |
1745 | |
1746 | /* now initialise each slot */ | |
1747 | for (i = 0; i < slot_count; i++) { | |
1748 | memset(&ca->slot_info[i], 0, sizeof(struct dvb_ca_slot)); | |
1749 | ca->slot_info[i].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1750 | atomic_set(&ca->slot_info[i].camchange_count, 0); | |
1751 | ca->slot_info[i].camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; | |
d7e43844 | 1752 | mutex_init(&ca->slot_info[i].slot_lock); |
1da177e4 LT |
1753 | } |
1754 | ||
30ad64b8 NS |
1755 | mutex_init(&ca->ioctl_mutex); |
1756 | ||
1da177e4 LT |
1757 | if (signal_pending(current)) { |
1758 | ret = -EINTR; | |
a2bbf5d0 | 1759 | goto unregister_device; |
1da177e4 LT |
1760 | } |
1761 | mb(); | |
1762 | ||
1763 | /* create a kthread for monitoring this CA device */ | |
9320874a CH |
1764 | ca->thread = kthread_run(dvb_ca_en50221_thread, ca, "kdvb-ca-%i:%i", |
1765 | ca->dvbdev->adapter->num, ca->dvbdev->id); | |
1766 | if (IS_ERR(ca->thread)) { | |
1767 | ret = PTR_ERR(ca->thread); | |
b3ad24d2 MCC |
1768 | pr_err("dvb_ca_init: failed to start kernel_thread (%d)\n", |
1769 | ret); | |
a2bbf5d0 | 1770 | goto unregister_device; |
1da177e4 | 1771 | } |
1da177e4 LT |
1772 | return 0; |
1773 | ||
a2bbf5d0 ME |
1774 | unregister_device: |
1775 | dvb_unregister_device(ca->dvbdev); | |
1776 | free_slot_info: | |
1777 | kfree(ca->slot_info); | |
1778 | free_ca: | |
1779 | kfree(ca); | |
1780 | exit: | |
1da177e4 LT |
1781 | pubca->private = NULL; |
1782 | return ret; | |
1783 | } | |
1784 | EXPORT_SYMBOL(dvb_ca_en50221_release); | |
1785 | ||
1786 | ||
1787 | ||
1788 | /** | |
1789 | * Release a DVB CA EN50221 interface device. | |
1790 | * | |
fbefb1a8 MCC |
1791 | * @ca_dev: The dvb_device_t instance for the CA device. |
1792 | * @ca: The associated dvb_ca instance. | |
1da177e4 LT |
1793 | */ |
1794 | void dvb_ca_en50221_release(struct dvb_ca_en50221 *pubca) | |
1795 | { | |
0c53c70f | 1796 | struct dvb_ca_private *ca = pubca->private; |
1da177e4 LT |
1797 | int i; |
1798 | ||
46b4f7c1 | 1799 | dprintk("%s\n", __func__); |
1da177e4 LT |
1800 | |
1801 | /* shutdown the thread if there was one */ | |
9320874a | 1802 | kthread_stop(ca->thread); |
1da177e4 LT |
1803 | |
1804 | for (i = 0; i < ca->slot_count; i++) { | |
1805 | dvb_ca_en50221_slot_shutdown(ca, i); | |
1806 | } | |
4d5030b6 | 1807 | dvb_remove_device(ca->dvbdev); |
da677fe1 | 1808 | dvb_ca_private_put(ca); |
1da177e4 LT |
1809 | pubca->private = NULL; |
1810 | } |