]>
Commit | Line | Data |
---|---|---|
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 | 195 | static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca); |
8ec6107a JJ |
196 | static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, |
197 | u8 *ebuf, int ecount); | |
198 | static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, | |
199 | u8 *ebuf, int ecount); | |
1da177e4 LT |
200 | |
201 | ||
202 | /** | |
203 | * Safely find needle in haystack. | |
204 | * | |
fbefb1a8 MCC |
205 | * @haystack: Buffer to look in. |
206 | * @hlen: Number of bytes in haystack. | |
207 | * @needle: Buffer to find. | |
208 | * @nlen: Number of bytes in needle. | |
1da177e4 LT |
209 | * @return Pointer into haystack needle was found at, or NULL if not found. |
210 | */ | |
8ec6107a | 211 | static char *findstr(char *haystack, int hlen, char *needle, int nlen) |
1da177e4 LT |
212 | { |
213 | int i; | |
214 | ||
215 | if (hlen < nlen) | |
216 | return NULL; | |
217 | ||
218 | for (i = 0; i <= hlen - nlen; i++) { | |
219 | if (!strncmp(haystack + i, needle, nlen)) | |
220 | return haystack + i; | |
221 | } | |
222 | ||
223 | return NULL; | |
224 | } | |
225 | ||
226 | ||
227 | ||
228 | /* ******************************************************************************** */ | |
229 | /* EN50221 physical interface functions */ | |
230 | ||
231 | ||
232 | /** | |
fbefb1a8 | 233 | * dvb_ca_en50221_check_camstatus - Check CAM status. |
1da177e4 LT |
234 | */ |
235 | static int dvb_ca_en50221_check_camstatus(struct dvb_ca_private *ca, int slot) | |
236 | { | |
237 | int slot_status; | |
238 | int cam_present_now; | |
239 | int cam_changed; | |
240 | ||
241 | /* IRQ mode */ | |
242 | if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE) { | |
243 | return (atomic_read(&ca->slot_info[slot].camchange_count) != 0); | |
244 | } | |
245 | ||
246 | /* poll mode */ | |
247 | slot_status = ca->pub->poll_slot_status(ca->pub, slot, ca->open); | |
248 | ||
249 | cam_present_now = (slot_status & DVB_CA_EN50221_POLL_CAM_PRESENT) ? 1 : 0; | |
250 | cam_changed = (slot_status & DVB_CA_EN50221_POLL_CAM_CHANGED) ? 1 : 0; | |
251 | if (!cam_changed) { | |
252 | int cam_present_old = (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_NONE); | |
253 | cam_changed = (cam_present_now != cam_present_old); | |
254 | } | |
255 | ||
256 | if (cam_changed) { | |
257 | if (!cam_present_now) { | |
258 | ca->slot_info[slot].camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; | |
259 | } else { | |
260 | ca->slot_info[slot].camchange_type = DVB_CA_EN50221_CAMCHANGE_INSERTED; | |
261 | } | |
262 | atomic_set(&ca->slot_info[slot].camchange_count, 1); | |
263 | } else { | |
264 | if ((ca->slot_info[slot].slot_state == DVB_CA_SLOTSTATE_WAITREADY) && | |
265 | (slot_status & DVB_CA_EN50221_POLL_CAM_READY)) { | |
266 | // move to validate state if reset is completed | |
267 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_VALIDATE; | |
268 | } | |
269 | } | |
270 | ||
271 | return cam_changed; | |
272 | } | |
273 | ||
274 | ||
275 | /** | |
fbefb1a8 MCC |
276 | * dvb_ca_en50221_wait_if_status - Wait for flags to become set on the STATUS |
277 | * register on a CAM interface, checking for errors and timeout. | |
1da177e4 | 278 | * |
fbefb1a8 MCC |
279 | * @ca: CA instance. |
280 | * @slot: Slot on interface. | |
281 | * @waitfor: Flags to wait for. | |
282 | * @timeout_ms: Timeout in milliseconds. | |
1da177e4 LT |
283 | * |
284 | * @return 0 on success, nonzero on error. | |
285 | */ | |
286 | static int dvb_ca_en50221_wait_if_status(struct dvb_ca_private *ca, int slot, | |
287 | u8 waitfor, int timeout_hz) | |
288 | { | |
289 | unsigned long timeout; | |
290 | unsigned long start; | |
291 | ||
46b4f7c1 | 292 | dprintk("%s\n", __func__); |
1da177e4 LT |
293 | |
294 | /* loop until timeout elapsed */ | |
295 | start = jiffies; | |
296 | timeout = jiffies + timeout_hz; | |
297 | while (1) { | |
298 | /* read the status and check for error */ | |
299 | int res = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); | |
300 | if (res < 0) | |
301 | return -EIO; | |
302 | ||
303 | /* if we got the flags, it was successful! */ | |
304 | if (res & waitfor) { | |
b3ad24d2 MCC |
305 | dprintk("%s succeeded timeout:%lu\n", |
306 | __func__, jiffies - start); | |
1da177e4 LT |
307 | return 0; |
308 | } | |
309 | ||
310 | /* check for timeout */ | |
311 | if (time_after(jiffies, timeout)) { | |
312 | break; | |
313 | } | |
314 | ||
315 | /* wait for a bit */ | |
316 | msleep(1); | |
317 | } | |
318 | ||
46b4f7c1 | 319 | dprintk("%s failed timeout:%lu\n", __func__, jiffies - start); |
1da177e4 LT |
320 | |
321 | /* if we get here, we've timed out */ | |
322 | return -ETIMEDOUT; | |
323 | } | |
324 | ||
325 | ||
326 | /** | |
fbefb1a8 | 327 | * dvb_ca_en50221_link_init - Initialise the link layer connection to a CAM. |
1da177e4 | 328 | * |
fbefb1a8 MCC |
329 | * @ca: CA instance. |
330 | * @slot: Slot id. | |
1da177e4 LT |
331 | * |
332 | * @return 0 on success, nonzero on failure. | |
333 | */ | |
334 | static int dvb_ca_en50221_link_init(struct dvb_ca_private *ca, int slot) | |
335 | { | |
336 | int ret; | |
337 | int buf_size; | |
338 | u8 buf[2]; | |
339 | ||
46b4f7c1 | 340 | dprintk("%s\n", __func__); |
1da177e4 LT |
341 | |
342 | /* we'll be determining these during this function */ | |
343 | ca->slot_info[slot].da_irq_supported = 0; | |
344 | ||
345 | /* set the host link buffer size temporarily. it will be overwritten with the | |
346 | * real negotiated size later. */ | |
347 | ca->slot_info[slot].link_buf_size = 2; | |
348 | ||
349 | /* read the buffer size from the CAM */ | |
350 | if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN | CMDREG_SR)) != 0) | |
351 | return ret; | |
5dbddc99 RM |
352 | ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_DA, HZ); |
353 | if (ret != 0) | |
1da177e4 LT |
354 | return ret; |
355 | if ((ret = dvb_ca_en50221_read_data(ca, slot, buf, 2)) != 2) | |
356 | return -EIO; | |
357 | if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN)) != 0) | |
358 | return ret; | |
359 | ||
360 | /* store it, and choose the minimum of our buffer and the CAM's buffer size */ | |
361 | buf_size = (buf[0] << 8) | buf[1]; | |
362 | if (buf_size > HOST_LINK_BUF_SIZE) | |
363 | buf_size = HOST_LINK_BUF_SIZE; | |
364 | ca->slot_info[slot].link_buf_size = buf_size; | |
365 | buf[0] = buf_size >> 8; | |
366 | buf[1] = buf_size & 0xff; | |
367 | dprintk("Chosen link buffer size of %i\n", buf_size); | |
368 | ||
369 | /* write the buffer size to the CAM */ | |
370 | if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN | CMDREG_SW)) != 0) | |
371 | return ret; | |
372 | if ((ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_FR, HZ / 10)) != 0) | |
373 | return ret; | |
374 | if ((ret = dvb_ca_en50221_write_data(ca, slot, buf, 2)) != 2) | |
375 | return -EIO; | |
376 | if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN)) != 0) | |
377 | return ret; | |
378 | ||
379 | /* success */ | |
380 | return 0; | |
381 | } | |
382 | ||
383 | /** | |
fbefb1a8 | 384 | * dvb_ca_en50221_read_tuple - Read a tuple from attribute memory. |
1da177e4 | 385 | * |
fbefb1a8 MCC |
386 | * @ca: CA instance. |
387 | * @slot: Slot id. | |
388 | * @address: Address to read from. Updated. | |
389 | * @tupleType: Tuple id byte. Updated. | |
390 | * @tupleLength: Tuple length. Updated. | |
391 | * @tuple: Dest buffer for tuple (must be 256 bytes). Updated. | |
1da177e4 LT |
392 | * |
393 | * @return 0 on success, nonzero on error. | |
394 | */ | |
395 | static int dvb_ca_en50221_read_tuple(struct dvb_ca_private *ca, int slot, | |
8ec6107a JJ |
396 | int *address, int *tupleType, |
397 | int *tupleLength, u8 *tuple) | |
1da177e4 LT |
398 | { |
399 | int i; | |
400 | int _tupleType; | |
401 | int _tupleLength; | |
402 | int _address = *address; | |
403 | ||
404 | /* grab the next tuple length and type */ | |
405 | if ((_tupleType = ca->pub->read_attribute_mem(ca->pub, slot, _address)) < 0) | |
406 | return _tupleType; | |
407 | if (_tupleType == 0xff) { | |
408 | dprintk("END OF CHAIN TUPLE type:0x%x\n", _tupleType); | |
409 | *address += 2; | |
410 | *tupleType = _tupleType; | |
411 | *tupleLength = 0; | |
412 | return 0; | |
413 | } | |
414 | if ((_tupleLength = ca->pub->read_attribute_mem(ca->pub, slot, _address + 2)) < 0) | |
415 | return _tupleLength; | |
416 | _address += 4; | |
417 | ||
418 | dprintk("TUPLE type:0x%x length:%i\n", _tupleType, _tupleLength); | |
419 | ||
420 | /* read in the whole tuple */ | |
421 | for (i = 0; i < _tupleLength; i++) { | |
422 | tuple[i] = ca->pub->read_attribute_mem(ca->pub, slot, _address + (i * 2)); | |
423 | dprintk(" 0x%02x: 0x%02x %c\n", | |
424 | i, tuple[i] & 0xff, | |
425 | ((tuple[i] > 31) && (tuple[i] < 127)) ? tuple[i] : '.'); | |
426 | } | |
427 | _address += (_tupleLength * 2); | |
428 | ||
429 | // success | |
430 | *tupleType = _tupleType; | |
431 | *tupleLength = _tupleLength; | |
432 | *address = _address; | |
433 | return 0; | |
434 | } | |
435 | ||
436 | ||
437 | /** | |
fbefb1a8 MCC |
438 | * dvb_ca_en50221_parse_attributes - Parse attribute memory of a CAM module, |
439 | * extracting Config register, and checking it is a DVB CAM module. | |
1da177e4 | 440 | * |
fbefb1a8 MCC |
441 | * @ca: CA instance. |
442 | * @slot: Slot id. | |
1da177e4 LT |
443 | * |
444 | * @return 0 on success, <0 on failure. | |
445 | */ | |
446 | static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot) | |
447 | { | |
448 | int address = 0; | |
449 | int tupleLength; | |
450 | int tupleType; | |
451 | u8 tuple[257]; | |
452 | char *dvb_str; | |
453 | int rasz; | |
454 | int status; | |
455 | int got_cftableentry = 0; | |
456 | int end_chain = 0; | |
457 | int i; | |
458 | u16 manfid = 0; | |
459 | u16 devid = 0; | |
460 | ||
461 | ||
462 | // CISTPL_DEVICE_0A | |
463 | if ((status = | |
464 | dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, &tupleLength, tuple)) < 0) | |
465 | return status; | |
466 | if (tupleType != 0x1D) | |
467 | return -EINVAL; | |
468 | ||
469 | ||
470 | ||
471 | // CISTPL_DEVICE_0C | |
472 | if ((status = | |
473 | dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, &tupleLength, tuple)) < 0) | |
474 | return status; | |
475 | if (tupleType != 0x1C) | |
476 | return -EINVAL; | |
477 | ||
478 | ||
479 | ||
480 | // CISTPL_VERS_1 | |
481 | if ((status = | |
482 | dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, &tupleLength, tuple)) < 0) | |
483 | return status; | |
484 | if (tupleType != 0x15) | |
485 | return -EINVAL; | |
486 | ||
487 | ||
488 | ||
489 | // CISTPL_MANFID | |
490 | if ((status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, | |
491 | &tupleLength, tuple)) < 0) | |
492 | return status; | |
493 | if (tupleType != 0x20) | |
494 | return -EINVAL; | |
495 | if (tupleLength != 4) | |
496 | return -EINVAL; | |
497 | manfid = (tuple[1] << 8) | tuple[0]; | |
498 | devid = (tuple[3] << 8) | tuple[2]; | |
499 | ||
500 | ||
501 | ||
502 | // CISTPL_CONFIG | |
503 | if ((status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, | |
504 | &tupleLength, tuple)) < 0) | |
505 | return status; | |
506 | if (tupleType != 0x1A) | |
507 | return -EINVAL; | |
508 | if (tupleLength < 3) | |
509 | return -EINVAL; | |
510 | ||
511 | /* extract the configbase */ | |
512 | rasz = tuple[0] & 3; | |
513 | if (tupleLength < (3 + rasz + 14)) | |
514 | return -EINVAL; | |
515 | ca->slot_info[slot].config_base = 0; | |
516 | for (i = 0; i < rasz + 1; i++) { | |
517 | ca->slot_info[slot].config_base |= (tuple[2 + i] << (8 * i)); | |
518 | } | |
519 | ||
520 | /* check it contains the correct DVB string */ | |
260f8d7c | 521 | dvb_str = findstr((char *)tuple, tupleLength, "DVB_CI_V", 8); |
1da177e4 LT |
522 | if (dvb_str == NULL) |
523 | return -EINVAL; | |
524 | if (tupleLength < ((dvb_str - (char *) tuple) + 12)) | |
525 | return -EINVAL; | |
526 | ||
527 | /* is it a version we support? */ | |
528 | if (strncmp(dvb_str + 8, "1.00", 4)) { | |
b3ad24d2 MCC |
529 | pr_err("dvb_ca adapter %d: Unsupported DVB CAM module version %c%c%c%c\n", |
530 | ca->dvbdev->adapter->num, dvb_str[8], dvb_str[9], | |
531 | dvb_str[10], dvb_str[11]); | |
1da177e4 LT |
532 | return -EINVAL; |
533 | } | |
534 | ||
535 | /* process the CFTABLE_ENTRY tuples, and any after those */ | |
536 | while ((!end_chain) && (address < 0x1000)) { | |
537 | if ((status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, | |
afd1a0c9 | 538 | &tupleLength, tuple)) < 0) |
1da177e4 LT |
539 | return status; |
540 | switch (tupleType) { | |
541 | case 0x1B: // CISTPL_CFTABLE_ENTRY | |
542 | if (tupleLength < (2 + 11 + 17)) | |
543 | break; | |
544 | ||
545 | /* if we've already parsed one, just use it */ | |
546 | if (got_cftableentry) | |
547 | break; | |
548 | ||
549 | /* get the config option */ | |
550 | ca->slot_info[slot].config_option = tuple[0] & 0x3f; | |
551 | ||
552 | /* OK, check it contains the correct strings */ | |
260f8d7c OE |
553 | if ((findstr((char *)tuple, tupleLength, "DVB_HOST", 8) == NULL) || |
554 | (findstr((char *)tuple, tupleLength, "DVB_CI_MODULE", 13) == NULL)) | |
1da177e4 LT |
555 | break; |
556 | ||
557 | got_cftableentry = 1; | |
558 | break; | |
559 | ||
560 | case 0x14: // CISTPL_NO_LINK | |
561 | break; | |
562 | ||
563 | case 0xFF: // CISTPL_END | |
564 | end_chain = 1; | |
565 | break; | |
566 | ||
567 | default: /* Unknown tuple type - just skip this tuple and move to the next one */ | |
b3ad24d2 MCC |
568 | dprintk("dvb_ca: Skipping unknown tuple type:0x%x length:0x%x\n", |
569 | tupleType, tupleLength); | |
1da177e4 LT |
570 | break; |
571 | } | |
572 | } | |
573 | ||
574 | if ((address > 0x1000) || (!got_cftableentry)) | |
575 | return -EINVAL; | |
576 | ||
577 | dprintk("Valid DVB CAM detected MANID:%x DEVID:%x CONFIGBASE:0x%x CONFIGOPTION:0x%x\n", | |
b3ad24d2 MCC |
578 | manfid, devid, ca->slot_info[slot].config_base, |
579 | ca->slot_info[slot].config_option); | |
1da177e4 LT |
580 | |
581 | // success! | |
582 | return 0; | |
583 | } | |
584 | ||
585 | ||
586 | /** | |
fbefb1a8 | 587 | * dvb_ca_en50221_set_configoption - Set CAM's configoption correctly. |
1da177e4 | 588 | * |
fbefb1a8 MCC |
589 | * @ca: CA instance. |
590 | * @slot: Slot containing the CAM. | |
1da177e4 LT |
591 | */ |
592 | static int dvb_ca_en50221_set_configoption(struct dvb_ca_private *ca, int slot) | |
593 | { | |
594 | int configoption; | |
595 | ||
46b4f7c1 | 596 | dprintk("%s\n", __func__); |
1da177e4 LT |
597 | |
598 | /* set the config option */ | |
599 | ca->pub->write_attribute_mem(ca->pub, slot, | |
600 | ca->slot_info[slot].config_base, | |
601 | ca->slot_info[slot].config_option); | |
602 | ||
603 | /* check it */ | |
604 | configoption = ca->pub->read_attribute_mem(ca->pub, slot, ca->slot_info[slot].config_base); | |
605 | dprintk("Set configoption 0x%x, read configoption 0x%x\n", | |
606 | ca->slot_info[slot].config_option, configoption & 0x3f); | |
607 | ||
608 | /* fine! */ | |
609 | return 0; | |
610 | ||
611 | } | |
612 | ||
613 | ||
614 | /** | |
fbefb1a8 MCC |
615 | * dvb_ca_en50221_read_data - This function talks to an EN50221 CAM control |
616 | * interface. It reads a buffer of data from the CAM. The data can either | |
617 | * be stored in a supplied buffer, or automatically be added to the slot's | |
618 | * rx_buffer. | |
1da177e4 | 619 | * |
fbefb1a8 MCC |
620 | * @ca: CA instance. |
621 | * @slot: Slot to read from. | |
622 | * @ebuf: If non-NULL, the data will be written to this buffer. If NULL, | |
1da177e4 | 623 | * the data will be added into the buffering system as a normal fragment. |
fbefb1a8 | 624 | * @ecount: Size of ebuf. Ignored if ebuf is NULL. |
1da177e4 LT |
625 | * |
626 | * @return Number of bytes read, or < 0 on error | |
627 | */ | |
8ec6107a JJ |
628 | static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, |
629 | u8 *ebuf, int ecount) | |
1da177e4 LT |
630 | { |
631 | int bytes_read; | |
632 | int status; | |
633 | u8 buf[HOST_LINK_BUF_SIZE]; | |
634 | int i; | |
635 | ||
46b4f7c1 | 636 | dprintk("%s\n", __func__); |
1da177e4 LT |
637 | |
638 | /* check if we have space for a link buf in the rx_buffer */ | |
639 | if (ebuf == NULL) { | |
640 | int buf_free; | |
641 | ||
1da177e4 | 642 | if (ca->slot_info[slot].rx_buffer.data == NULL) { |
1da177e4 LT |
643 | status = -EIO; |
644 | goto exit; | |
645 | } | |
646 | buf_free = dvb_ringbuffer_free(&ca->slot_info[slot].rx_buffer); | |
1da177e4 | 647 | |
f894165c RM |
648 | if (buf_free < (ca->slot_info[slot].link_buf_size + |
649 | DVB_RINGBUFFER_PKTHDRSIZE)) { | |
1da177e4 LT |
650 | status = -EAGAIN; |
651 | goto exit; | |
652 | } | |
653 | } | |
654 | ||
f894165c RM |
655 | if (ca->pub->read_data && |
656 | (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_LINKINIT)) { | |
657 | if (ebuf == NULL) | |
658 | status = ca->pub->read_data(ca->pub, slot, buf, | |
659 | sizeof(buf)); | |
660 | else | |
661 | status = ca->pub->read_data(ca->pub, slot, buf, ecount); | |
662 | if (status < 0) | |
663 | return status; | |
664 | bytes_read = status; | |
665 | if (status == 0) | |
666 | goto exit; | |
667 | } else { | |
1da177e4 | 668 | |
f894165c RM |
669 | /* check if there is data available */ |
670 | status = ca->pub->read_cam_control(ca->pub, slot, | |
671 | CTRLIF_STATUS); | |
672 | if (status < 0) | |
1da177e4 | 673 | goto exit; |
f894165c RM |
674 | if (!(status & STATUSREG_DA)) { |
675 | /* no data */ | |
676 | status = 0; | |
1da177e4 LT |
677 | goto exit; |
678 | } | |
f894165c RM |
679 | |
680 | /* read the amount of data */ | |
681 | status = ca->pub->read_cam_control(ca->pub, slot, | |
682 | CTRLIF_SIZE_HIGH); | |
683 | if (status < 0) | |
684 | goto exit; | |
685 | bytes_read = status << 8; | |
686 | status = ca->pub->read_cam_control(ca->pub, slot, | |
687 | CTRLIF_SIZE_LOW); | |
688 | if (status < 0) | |
1da177e4 | 689 | goto exit; |
f894165c RM |
690 | bytes_read |= status; |
691 | ||
692 | /* check it will fit */ | |
693 | if (ebuf == NULL) { | |
694 | if (bytes_read > ca->slot_info[slot].link_buf_size) { | |
695 | pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the link buffer size (%i > %i)!\n", | |
696 | ca->dvbdev->adapter->num, bytes_read, | |
697 | ca->slot_info[slot].link_buf_size); | |
698 | ca->slot_info[slot].slot_state = | |
699 | DVB_CA_SLOTSTATE_LINKINIT; | |
700 | status = -EIO; | |
701 | goto exit; | |
702 | } | |
703 | if (bytes_read < 2) { | |
704 | pr_err("dvb_ca adapter %d: CAM sent a buffer that was less than 2 bytes!\n", | |
705 | ca->dvbdev->adapter->num); | |
706 | ca->slot_info[slot].slot_state = | |
707 | DVB_CA_SLOTSTATE_LINKINIT; | |
708 | status = -EIO; | |
709 | goto exit; | |
710 | } | |
711 | } else { | |
712 | if (bytes_read > ecount) { | |
713 | pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the ecount size!\n", | |
714 | ca->dvbdev->adapter->num); | |
715 | status = -EIO; | |
716 | goto exit; | |
717 | } | |
1da177e4 | 718 | } |
1da177e4 | 719 | |
f894165c RM |
720 | /* fill the buffer */ |
721 | for (i = 0; i < bytes_read; i++) { | |
722 | /* read byte and check */ | |
723 | status = ca->pub->read_cam_control(ca->pub, slot, | |
724 | CTRLIF_DATA); | |
725 | if (status < 0) | |
726 | goto exit; | |
1da177e4 | 727 | |
f894165c RM |
728 | /* OK, store it in the buffer */ |
729 | buf[i] = status; | |
730 | } | |
1da177e4 | 731 | |
f894165c RM |
732 | /* check for read error (RE should now be 0) */ |
733 | status = ca->pub->read_cam_control(ca->pub, slot, | |
734 | CTRLIF_STATUS); | |
735 | if (status < 0) | |
736 | goto exit; | |
737 | if (status & STATUSREG_RE) { | |
738 | ca->slot_info[slot].slot_state = | |
739 | DVB_CA_SLOTSTATE_LINKINIT; | |
740 | status = -EIO; | |
741 | goto exit; | |
742 | } | |
1da177e4 LT |
743 | } |
744 | ||
745 | /* OK, add it to the receive buffer, or copy into external buffer if supplied */ | |
746 | if (ebuf == NULL) { | |
1da177e4 | 747 | if (ca->slot_info[slot].rx_buffer.data == NULL) { |
1da177e4 LT |
748 | status = -EIO; |
749 | goto exit; | |
750 | } | |
751 | dvb_ringbuffer_pkt_write(&ca->slot_info[slot].rx_buffer, buf, bytes_read); | |
1da177e4 LT |
752 | } else { |
753 | memcpy(ebuf, buf, bytes_read); | |
754 | } | |
755 | ||
756 | dprintk("Received CA packet for slot %i connection id 0x%x last_frag:%i size:0x%x\n", slot, | |
757 | buf[0], (buf[1] & 0x80) == 0, bytes_read); | |
758 | ||
759 | /* wake up readers when a last_fragment is received */ | |
760 | if ((buf[1] & 0x80) == 0x00) { | |
761 | wake_up_interruptible(&ca->wait_queue); | |
762 | } | |
763 | status = bytes_read; | |
764 | ||
765 | exit: | |
766 | return status; | |
767 | } | |
768 | ||
769 | ||
770 | /** | |
fbefb1a8 MCC |
771 | * dvb_ca_en50221_write_data - This function talks to an EN50221 CAM control |
772 | * interface. It writes a buffer of data to a CAM. | |
1da177e4 | 773 | * |
fbefb1a8 MCC |
774 | * @ca: CA instance. |
775 | * @slot: Slot to write to. | |
776 | * @ebuf: The data in this buffer is treated as a complete link-level packet to | |
1da177e4 | 777 | * be written. |
fbefb1a8 | 778 | * @count: Size of ebuf. |
1da177e4 LT |
779 | * |
780 | * @return Number of bytes written, or < 0 on error. | |
781 | */ | |
8ec6107a JJ |
782 | static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, |
783 | u8 *buf, int bytes_write) | |
1da177e4 LT |
784 | { |
785 | int status; | |
786 | int i; | |
787 | ||
46b4f7c1 | 788 | dprintk("%s\n", __func__); |
1da177e4 LT |
789 | |
790 | ||
d7e43844 | 791 | /* sanity check */ |
1da177e4 LT |
792 | if (bytes_write > ca->slot_info[slot].link_buf_size) |
793 | return -EINVAL; | |
794 | ||
f894165c RM |
795 | if (ca->pub->write_data && |
796 | (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_LINKINIT)) | |
797 | return ca->pub->write_data(ca->pub, slot, buf, bytes_write); | |
798 | ||
d7e43844 MD |
799 | /* it is possible we are dealing with a single buffer implementation, |
800 | thus if there is data available for read or if there is even a read | |
801 | already in progress, we do nothing but awake the kernel thread to | |
802 | process the data if necessary. */ | |
1da177e4 LT |
803 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) |
804 | goto exitnowrite; | |
805 | if (status & (STATUSREG_DA | STATUSREG_RE)) { | |
d7e43844 MD |
806 | if (status & STATUSREG_DA) |
807 | dvb_ca_en50221_thread_wakeup(ca); | |
808 | ||
1da177e4 LT |
809 | status = -EAGAIN; |
810 | goto exitnowrite; | |
811 | } | |
812 | ||
813 | /* OK, set HC bit */ | |
814 | if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, | |
815 | IRQEN | CMDREG_HC)) != 0) | |
816 | goto exit; | |
817 | ||
818 | /* check if interface is still free */ | |
819 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) | |
820 | goto exit; | |
821 | if (!(status & STATUSREG_FR)) { | |
822 | /* it wasn't free => try again later */ | |
823 | status = -EAGAIN; | |
824 | goto exit; | |
825 | } | |
826 | ||
e7080d44 J |
827 | /* |
828 | * It may need some time for the CAM to settle down, or there might | |
829 | * be a race condition between the CAM, writing HC and our last | |
830 | * check for DA. This happens, if the CAM asserts DA, just after | |
831 | * checking DA before we are setting HC. In this case it might be | |
832 | * a bug in the CAM to keep the FR bit, the lower layer/HW | |
833 | * communication requires a longer timeout or the CAM needs more | |
834 | * time internally. But this happens in reality! | |
835 | * We need to read the status from the HW again and do the same | |
836 | * we did for the previous check for DA | |
837 | */ | |
838 | status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); | |
839 | if (status < 0) | |
840 | goto exit; | |
841 | ||
842 | if (status & (STATUSREG_DA | STATUSREG_RE)) { | |
843 | if (status & STATUSREG_DA) | |
844 | dvb_ca_en50221_thread_wakeup(ca); | |
845 | ||
846 | status = -EAGAIN; | |
847 | goto exit; | |
848 | } | |
849 | ||
1da177e4 LT |
850 | /* send the amount of data */ |
851 | if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH, bytes_write >> 8)) != 0) | |
852 | goto exit; | |
853 | if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW, | |
854 | bytes_write & 0xff)) != 0) | |
855 | goto exit; | |
856 | ||
857 | /* send the buffer */ | |
858 | for (i = 0; i < bytes_write; i++) { | |
859 | if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_DATA, buf[i])) != 0) | |
860 | goto exit; | |
861 | } | |
862 | ||
863 | /* check for write error (WE should now be 0) */ | |
864 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) | |
865 | goto exit; | |
866 | if (status & STATUSREG_WE) { | |
867 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
868 | status = -EIO; | |
869 | goto exit; | |
870 | } | |
871 | status = bytes_write; | |
872 | ||
873 | dprintk("Wrote CA packet for slot %i, connection id 0x%x last_frag:%i size:0x%x\n", slot, | |
874 | buf[0], (buf[1] & 0x80) == 0, bytes_write); | |
875 | ||
876 | exit: | |
877 | ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN); | |
878 | ||
879 | exitnowrite: | |
880 | return status; | |
881 | } | |
1da177e4 LT |
882 | |
883 | ||
884 | ||
885 | /* ******************************************************************************** */ | |
886 | /* EN50221 higher level functions */ | |
887 | ||
888 | ||
889 | /** | |
97adc2b3 | 890 | * dvb_ca_en50221_slot_shutdown - A CAM has been removed => shut it down. |
1da177e4 | 891 | * |
fbefb1a8 MCC |
892 | * @ca: CA instance. |
893 | * @slot: Slot to shut down. | |
1da177e4 LT |
894 | */ |
895 | static int dvb_ca_en50221_slot_shutdown(struct dvb_ca_private *ca, int slot) | |
896 | { | |
46b4f7c1 | 897 | dprintk("%s\n", __func__); |
1da177e4 | 898 | |
1da177e4 LT |
899 | ca->pub->slot_shutdown(ca->pub, slot); |
900 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1da177e4 LT |
901 | |
902 | /* need to wake up all processes to check if they're now | |
903 | trying to write to a defunct CAM */ | |
904 | wake_up_interruptible(&ca->wait_queue); | |
905 | ||
906 | dprintk("Slot %i shutdown\n", slot); | |
907 | ||
908 | /* success */ | |
909 | return 0; | |
910 | } | |
1da177e4 LT |
911 | |
912 | ||
913 | /** | |
97adc2b3 | 914 | * dvb_ca_en50221_camchange_irq - A CAMCHANGE IRQ has occurred. |
1da177e4 | 915 | * |
fbefb1a8 MCC |
916 | * @ca: CA instance. |
917 | * @slot: Slot concerned. | |
918 | * @change_type: One of the DVB_CA_CAMCHANGE_* values. | |
1da177e4 LT |
919 | */ |
920 | void dvb_ca_en50221_camchange_irq(struct dvb_ca_en50221 *pubca, int slot, int change_type) | |
921 | { | |
0c53c70f | 922 | struct dvb_ca_private *ca = pubca->private; |
1da177e4 LT |
923 | |
924 | dprintk("CAMCHANGE IRQ slot:%i change_type:%i\n", slot, change_type); | |
925 | ||
926 | switch (change_type) { | |
927 | case DVB_CA_EN50221_CAMCHANGE_REMOVED: | |
928 | case DVB_CA_EN50221_CAMCHANGE_INSERTED: | |
929 | break; | |
930 | ||
931 | default: | |
932 | return; | |
933 | } | |
934 | ||
935 | ca->slot_info[slot].camchange_type = change_type; | |
936 | atomic_inc(&ca->slot_info[slot].camchange_count); | |
937 | dvb_ca_en50221_thread_wakeup(ca); | |
938 | } | |
97adc2b3 | 939 | EXPORT_SYMBOL(dvb_ca_en50221_camchange_irq); |
1da177e4 LT |
940 | |
941 | ||
942 | /** | |
fbefb1a8 | 943 | * dvb_ca_en50221_camready_irq - A CAMREADY IRQ has occurred. |
1da177e4 | 944 | * |
fbefb1a8 MCC |
945 | * @ca: CA instance. |
946 | * @slot: Slot concerned. | |
1da177e4 LT |
947 | */ |
948 | void dvb_ca_en50221_camready_irq(struct dvb_ca_en50221 *pubca, int slot) | |
949 | { | |
0c53c70f | 950 | struct dvb_ca_private *ca = pubca->private; |
1da177e4 LT |
951 | |
952 | dprintk("CAMREADY IRQ slot:%i\n", slot); | |
953 | ||
954 | if (ca->slot_info[slot].slot_state == DVB_CA_SLOTSTATE_WAITREADY) { | |
955 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_VALIDATE; | |
956 | dvb_ca_en50221_thread_wakeup(ca); | |
957 | } | |
958 | } | |
97adc2b3 | 959 | EXPORT_SYMBOL(dvb_ca_en50221_camready_irq); |
1da177e4 LT |
960 | |
961 | ||
962 | /** | |
97adc2b3 | 963 | * dvb_ca_en50221_frda_irq - An FR or DA IRQ has occurred. |
1da177e4 | 964 | * |
fbefb1a8 MCC |
965 | * @ca: CA instance. |
966 | * @slot: Slot concerned. | |
1da177e4 LT |
967 | */ |
968 | void dvb_ca_en50221_frda_irq(struct dvb_ca_en50221 *pubca, int slot) | |
969 | { | |
0c53c70f | 970 | struct dvb_ca_private *ca = pubca->private; |
1da177e4 LT |
971 | int flags; |
972 | ||
973 | dprintk("FR/DA IRQ slot:%i\n", slot); | |
974 | ||
975 | switch (ca->slot_info[slot].slot_state) { | |
976 | case DVB_CA_SLOTSTATE_LINKINIT: | |
977 | flags = ca->pub->read_cam_control(pubca, slot, CTRLIF_STATUS); | |
978 | if (flags & STATUSREG_DA) { | |
979 | dprintk("CAM supports DA IRQ\n"); | |
980 | ca->slot_info[slot].da_irq_supported = 1; | |
981 | } | |
982 | break; | |
983 | ||
984 | case DVB_CA_SLOTSTATE_RUNNING: | |
985 | if (ca->open) | |
ded92846 | 986 | dvb_ca_en50221_thread_wakeup(ca); |
1da177e4 LT |
987 | break; |
988 | } | |
989 | } | |
97adc2b3 | 990 | EXPORT_SYMBOL(dvb_ca_en50221_frda_irq); |
1da177e4 LT |
991 | |
992 | ||
993 | /* ******************************************************************************** */ | |
994 | /* EN50221 thread functions */ | |
995 | ||
996 | /** | |
997 | * Wake up the DVB CA thread | |
998 | * | |
fbefb1a8 | 999 | * @ca: CA instance. |
1da177e4 LT |
1000 | */ |
1001 | static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca) | |
1002 | { | |
1003 | ||
46b4f7c1 | 1004 | dprintk("%s\n", __func__); |
1da177e4 LT |
1005 | |
1006 | ca->wakeup = 1; | |
1007 | mb(); | |
9320874a | 1008 | wake_up_process(ca->thread); |
1da177e4 LT |
1009 | } |
1010 | ||
1da177e4 LT |
1011 | /** |
1012 | * Update the delay used by the thread. | |
1013 | * | |
fbefb1a8 | 1014 | * @ca: CA instance. |
1da177e4 LT |
1015 | */ |
1016 | static void dvb_ca_en50221_thread_update_delay(struct dvb_ca_private *ca) | |
1017 | { | |
1018 | int delay; | |
1019 | int curdelay = 100000000; | |
1020 | int slot; | |
1021 | ||
71a35fe2 RS |
1022 | /* Beware of too high polling frequency, because one polling |
1023 | * call might take several hundred milliseconds until timeout! | |
1024 | */ | |
1da177e4 LT |
1025 | for (slot = 0; slot < ca->slot_count; slot++) { |
1026 | switch (ca->slot_info[slot].slot_state) { | |
1027 | default: | |
1028 | case DVB_CA_SLOTSTATE_NONE: | |
71a35fe2 RS |
1029 | delay = HZ * 60; /* 60s */ |
1030 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) | |
1031 | delay = HZ * 5; /* 5s */ | |
1032 | break; | |
1da177e4 | 1033 | case DVB_CA_SLOTSTATE_INVALID: |
71a35fe2 RS |
1034 | delay = HZ * 60; /* 60s */ |
1035 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) | |
1036 | delay = HZ / 10; /* 100ms */ | |
1da177e4 LT |
1037 | break; |
1038 | ||
1039 | case DVB_CA_SLOTSTATE_UNINITIALISED: | |
1040 | case DVB_CA_SLOTSTATE_WAITREADY: | |
1041 | case DVB_CA_SLOTSTATE_VALIDATE: | |
1042 | case DVB_CA_SLOTSTATE_WAITFR: | |
1043 | case DVB_CA_SLOTSTATE_LINKINIT: | |
71a35fe2 | 1044 | delay = HZ / 10; /* 100ms */ |
1da177e4 LT |
1045 | break; |
1046 | ||
1047 | case DVB_CA_SLOTSTATE_RUNNING: | |
71a35fe2 RS |
1048 | delay = HZ * 60; /* 60s */ |
1049 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) | |
1050 | delay = HZ / 10; /* 100ms */ | |
1da177e4 LT |
1051 | if (ca->open) { |
1052 | if ((!ca->slot_info[slot].da_irq_supported) || | |
71a35fe2 RS |
1053 | (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_DA))) |
1054 | delay = HZ / 10; /* 100ms */ | |
1da177e4 LT |
1055 | } |
1056 | break; | |
1057 | } | |
1058 | ||
1059 | if (delay < curdelay) | |
1060 | curdelay = delay; | |
1061 | } | |
1062 | ||
1063 | ca->delay = curdelay; | |
1064 | } | |
1065 | ||
1066 | ||
1067 | ||
1068 | /** | |
1069 | * Kernel thread which monitors CA slots for CAM changes, and performs data transfers. | |
1070 | */ | |
1071 | static int dvb_ca_en50221_thread(void *data) | |
1072 | { | |
0c53c70f | 1073 | struct dvb_ca_private *ca = data; |
1da177e4 LT |
1074 | int slot; |
1075 | int flags; | |
1076 | int status; | |
1077 | int pktcount; | |
1078 | void *rxbuf; | |
1079 | ||
46b4f7c1 | 1080 | dprintk("%s\n", __func__); |
1da177e4 | 1081 | |
1da177e4 LT |
1082 | /* choose the correct initial delay */ |
1083 | dvb_ca_en50221_thread_update_delay(ca); | |
1084 | ||
1085 | /* main loop */ | |
9320874a | 1086 | while (!kthread_should_stop()) { |
1da177e4 | 1087 | /* sleep for a bit */ |
a39a8ed7 | 1088 | if (!ca->wakeup) { |
9320874a CH |
1089 | set_current_state(TASK_INTERRUPTIBLE); |
1090 | schedule_timeout(ca->delay); | |
1091 | if (kthread_should_stop()) | |
1092 | return 0; | |
1da177e4 LT |
1093 | } |
1094 | ca->wakeup = 0; | |
1095 | ||
1096 | /* go through all the slots processing them */ | |
1097 | for (slot = 0; slot < ca->slot_count; slot++) { | |
1098 | ||
d7e43844 MD |
1099 | mutex_lock(&ca->slot_info[slot].slot_lock); |
1100 | ||
1da177e4 LT |
1101 | // check the cam status + deal with CAMCHANGEs |
1102 | while (dvb_ca_en50221_check_camstatus(ca, slot)) { | |
1103 | /* clear down an old CI slot if necessary */ | |
1104 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_NONE) | |
1105 | dvb_ca_en50221_slot_shutdown(ca, slot); | |
1106 | ||
1107 | /* if a CAM is NOW present, initialise it */ | |
1108 | if (ca->slot_info[slot].camchange_type == DVB_CA_EN50221_CAMCHANGE_INSERTED) { | |
1109 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_UNINITIALISED; | |
1110 | } | |
1111 | ||
1112 | /* we've handled one CAMCHANGE */ | |
1113 | dvb_ca_en50221_thread_update_delay(ca); | |
1114 | atomic_dec(&ca->slot_info[slot].camchange_count); | |
1115 | } | |
1116 | ||
1117 | // CAM state machine | |
1118 | switch (ca->slot_info[slot].slot_state) { | |
1119 | case DVB_CA_SLOTSTATE_NONE: | |
1120 | case DVB_CA_SLOTSTATE_INVALID: | |
1121 | // no action needed | |
1122 | break; | |
1123 | ||
1124 | case DVB_CA_SLOTSTATE_UNINITIALISED: | |
1125 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_WAITREADY; | |
1126 | ca->pub->slot_reset(ca->pub, slot); | |
1127 | ca->slot_info[slot].timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); | |
1128 | break; | |
1129 | ||
1130 | case DVB_CA_SLOTSTATE_WAITREADY: | |
1131 | if (time_after(jiffies, ca->slot_info[slot].timeout)) { | |
b3ad24d2 | 1132 | pr_err("dvb_ca adaptor %d: PC card did not respond :(\n", |
1da177e4 LT |
1133 | ca->dvbdev->adapter->num); |
1134 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1135 | dvb_ca_en50221_thread_update_delay(ca); | |
1136 | break; | |
1137 | } | |
1138 | // no other action needed; will automatically change state when ready | |
1139 | break; | |
1140 | ||
1141 | case DVB_CA_SLOTSTATE_VALIDATE: | |
5c1208ba AQ |
1142 | if (dvb_ca_en50221_parse_attributes(ca, slot) != 0) { |
1143 | /* we need this extra check for annoying interfaces like the budget-av */ | |
1144 | if ((!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) && | |
1145 | (ca->pub->poll_slot_status)) { | |
c6eb8eaf | 1146 | status = ca->pub->poll_slot_status(ca->pub, slot, 0); |
5c1208ba AQ |
1147 | if (!(status & DVB_CA_EN50221_POLL_CAM_PRESENT)) { |
1148 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1149 | dvb_ca_en50221_thread_update_delay(ca); | |
1150 | break; | |
1151 | } | |
1152 | } | |
1153 | ||
b3ad24d2 | 1154 | pr_err("dvb_ca adapter %d: Invalid PC card inserted :(\n", |
1da177e4 LT |
1155 | ca->dvbdev->adapter->num); |
1156 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1157 | dvb_ca_en50221_thread_update_delay(ca); | |
1158 | break; | |
1159 | } | |
1160 | if (dvb_ca_en50221_set_configoption(ca, slot) != 0) { | |
b3ad24d2 | 1161 | pr_err("dvb_ca adapter %d: Unable to initialise CAM :(\n", |
1da177e4 LT |
1162 | ca->dvbdev->adapter->num); |
1163 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1164 | dvb_ca_en50221_thread_update_delay(ca); | |
1165 | break; | |
1166 | } | |
1167 | if (ca->pub->write_cam_control(ca->pub, slot, | |
1168 | CTRLIF_COMMAND, CMDREG_RS) != 0) { | |
b3ad24d2 | 1169 | pr_err("dvb_ca adapter %d: Unable to reset CAM IF\n", |
1da177e4 LT |
1170 | ca->dvbdev->adapter->num); |
1171 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1172 | dvb_ca_en50221_thread_update_delay(ca); | |
1173 | break; | |
1174 | } | |
1175 | dprintk("DVB CAM validated successfully\n"); | |
1176 | ||
1177 | ca->slot_info[slot].timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); | |
1178 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_WAITFR; | |
1179 | ca->wakeup = 1; | |
1180 | break; | |
1181 | ||
1182 | case DVB_CA_SLOTSTATE_WAITFR: | |
1183 | if (time_after(jiffies, ca->slot_info[slot].timeout)) { | |
b3ad24d2 | 1184 | pr_err("dvb_ca adapter %d: DVB CAM did not respond :(\n", |
1da177e4 LT |
1185 | ca->dvbdev->adapter->num); |
1186 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1187 | dvb_ca_en50221_thread_update_delay(ca); | |
1188 | break; | |
1189 | } | |
1190 | ||
1191 | flags = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); | |
1192 | if (flags & STATUSREG_FR) { | |
1193 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
1194 | ca->wakeup = 1; | |
1195 | } | |
1196 | break; | |
1197 | ||
1198 | case DVB_CA_SLOTSTATE_LINKINIT: | |
1199 | if (dvb_ca_en50221_link_init(ca, slot) != 0) { | |
5c1208ba AQ |
1200 | /* we need this extra check for annoying interfaces like the budget-av */ |
1201 | if ((!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) && | |
1202 | (ca->pub->poll_slot_status)) { | |
c6eb8eaf | 1203 | status = ca->pub->poll_slot_status(ca->pub, slot, 0); |
5c1208ba AQ |
1204 | if (!(status & DVB_CA_EN50221_POLL_CAM_PRESENT)) { |
1205 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1206 | dvb_ca_en50221_thread_update_delay(ca); | |
1207 | break; | |
1208 | } | |
1209 | } | |
1210 | ||
b3ad24d2 MCC |
1211 | pr_err("dvb_ca adapter %d: DVB CAM link initialisation failed :(\n", |
1212 | ca->dvbdev->adapter->num); | |
cb61488a RM |
1213 | ca->slot_info[slot].slot_state = |
1214 | DVB_CA_SLOTSTATE_UNINITIALISED; | |
1da177e4 LT |
1215 | dvb_ca_en50221_thread_update_delay(ca); |
1216 | break; | |
1217 | } | |
1218 | ||
ded92846 AQ |
1219 | if (ca->slot_info[slot].rx_buffer.data == NULL) { |
1220 | rxbuf = vmalloc(RX_BUFFER_SIZE); | |
1221 | if (rxbuf == NULL) { | |
b3ad24d2 MCC |
1222 | pr_err("dvb_ca adapter %d: Unable to allocate CAM rx buffer :(\n", |
1223 | ca->dvbdev->adapter->num); | |
ded92846 AQ |
1224 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; |
1225 | dvb_ca_en50221_thread_update_delay(ca); | |
1226 | break; | |
1227 | } | |
1228 | dvb_ringbuffer_init(&ca->slot_info[slot].rx_buffer, rxbuf, RX_BUFFER_SIZE); | |
1da177e4 | 1229 | } |
1da177e4 LT |
1230 | |
1231 | ca->pub->slot_ts_enable(ca->pub, slot); | |
1232 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_RUNNING; | |
1233 | dvb_ca_en50221_thread_update_delay(ca); | |
b3ad24d2 MCC |
1234 | pr_err("dvb_ca adapter %d: DVB CAM detected and initialised successfully\n", |
1235 | ca->dvbdev->adapter->num); | |
1da177e4 LT |
1236 | break; |
1237 | ||
1238 | case DVB_CA_SLOTSTATE_RUNNING: | |
1239 | if (!ca->open) | |
d7e43844 | 1240 | break; |
1da177e4 | 1241 | |
ded92846 | 1242 | // poll slots for data |
1da177e4 LT |
1243 | pktcount = 0; |
1244 | while ((status = dvb_ca_en50221_read_data(ca, slot, NULL, 0)) > 0) { | |
1245 | if (!ca->open) | |
1246 | break; | |
1247 | ||
1248 | /* if a CAMCHANGE occurred at some point, do not do any more processing of this slot */ | |
1249 | if (dvb_ca_en50221_check_camstatus(ca, slot)) { | |
1250 | // we dont want to sleep on the next iteration so we can handle the cam change | |
1251 | ca->wakeup = 1; | |
1252 | break; | |
1253 | } | |
1254 | ||
1255 | /* check if we've hit our limit this time */ | |
1256 | if (++pktcount >= MAX_RX_PACKETS_PER_ITERATION) { | |
1257 | // dont sleep; there is likely to be more data to read | |
1258 | ca->wakeup = 1; | |
1259 | break; | |
1260 | } | |
1261 | } | |
1262 | break; | |
1263 | } | |
d7e43844 MD |
1264 | |
1265 | mutex_unlock(&ca->slot_info[slot].slot_lock); | |
1da177e4 LT |
1266 | } |
1267 | } | |
1268 | ||
1da177e4 LT |
1269 | return 0; |
1270 | } | |
1271 | ||
1272 | ||
1273 | ||
1274 | /* ******************************************************************************** */ | |
1275 | /* EN50221 IO interface functions */ | |
1276 | ||
1277 | /** | |
1278 | * Real ioctl implementation. | |
1279 | * NOTE: CA_SEND_MSG/CA_GET_MSG ioctls have userspace buffers passed to them. | |
1280 | * | |
fbefb1a8 MCC |
1281 | * @inode: Inode concerned. |
1282 | * @file: File concerned. | |
1283 | * @cmd: IOCTL command. | |
1284 | * @arg: Associated argument. | |
1da177e4 LT |
1285 | * |
1286 | * @return 0 on success, <0 on error. | |
1287 | */ | |
16ef8def | 1288 | static int dvb_ca_en50221_io_do_ioctl(struct file *file, |
1da177e4 LT |
1289 | unsigned int cmd, void *parg) |
1290 | { | |
0c53c70f JS |
1291 | struct dvb_device *dvbdev = file->private_data; |
1292 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1293 | int err = 0; |
1294 | int slot; | |
1295 | ||
46b4f7c1 | 1296 | dprintk("%s\n", __func__); |
1da177e4 | 1297 | |
30ad64b8 NS |
1298 | if (mutex_lock_interruptible(&ca->ioctl_mutex)) |
1299 | return -ERESTARTSYS; | |
1300 | ||
1da177e4 LT |
1301 | switch (cmd) { |
1302 | case CA_RESET: | |
1303 | for (slot = 0; slot < ca->slot_count; slot++) { | |
d7e43844 | 1304 | mutex_lock(&ca->slot_info[slot].slot_lock); |
1da177e4 LT |
1305 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_NONE) { |
1306 | dvb_ca_en50221_slot_shutdown(ca, slot); | |
1307 | if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE) | |
1308 | dvb_ca_en50221_camchange_irq(ca->pub, | |
1309 | slot, | |
1310 | DVB_CA_EN50221_CAMCHANGE_INSERTED); | |
1311 | } | |
d7e43844 | 1312 | mutex_unlock(&ca->slot_info[slot].slot_lock); |
1da177e4 LT |
1313 | } |
1314 | ca->next_read_slot = 0; | |
1315 | dvb_ca_en50221_thread_wakeup(ca); | |
1316 | break; | |
1317 | ||
1318 | case CA_GET_CAP: { | |
0c53c70f | 1319 | struct ca_caps *caps = parg; |
1da177e4 LT |
1320 | |
1321 | caps->slot_num = ca->slot_count; | |
1322 | caps->slot_type = CA_CI_LINK; | |
1323 | caps->descr_num = 0; | |
1324 | caps->descr_type = 0; | |
1325 | break; | |
1326 | } | |
1327 | ||
1328 | case CA_GET_SLOT_INFO: { | |
0c53c70f | 1329 | struct ca_slot_info *info = parg; |
1da177e4 | 1330 | |
c4fe29a3 DC |
1331 | if ((info->num > ca->slot_count) || (info->num < 0)) { |
1332 | err = -EINVAL; | |
1333 | goto out_unlock; | |
1334 | } | |
1da177e4 LT |
1335 | |
1336 | info->type = CA_CI_LINK; | |
1337 | info->flags = 0; | |
1338 | if ((ca->slot_info[info->num].slot_state != DVB_CA_SLOTSTATE_NONE) | |
1339 | && (ca->slot_info[info->num].slot_state != DVB_CA_SLOTSTATE_INVALID)) { | |
1340 | info->flags = CA_CI_MODULE_PRESENT; | |
1341 | } | |
1342 | if (ca->slot_info[info->num].slot_state == DVB_CA_SLOTSTATE_RUNNING) { | |
1343 | info->flags |= CA_CI_MODULE_READY; | |
1344 | } | |
1345 | break; | |
1346 | } | |
1347 | ||
1348 | default: | |
1349 | err = -EINVAL; | |
1350 | break; | |
1351 | } | |
1352 | ||
c4fe29a3 | 1353 | out_unlock: |
30ad64b8 | 1354 | mutex_unlock(&ca->ioctl_mutex); |
1da177e4 LT |
1355 | return err; |
1356 | } | |
1357 | ||
1358 | ||
1359 | /** | |
1360 | * Wrapper for ioctl implementation. | |
1361 | * | |
fbefb1a8 MCC |
1362 | * @inode: Inode concerned. |
1363 | * @file: File concerned. | |
1364 | * @cmd: IOCTL command. | |
1365 | * @arg: Associated argument. | |
1da177e4 LT |
1366 | * |
1367 | * @return 0 on success, <0 on error. | |
1368 | */ | |
16ef8def AB |
1369 | static long dvb_ca_en50221_io_ioctl(struct file *file, |
1370 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1371 | { |
72024f1e | 1372 | return dvb_usercopy(file, cmd, arg, dvb_ca_en50221_io_do_ioctl); |
1da177e4 LT |
1373 | } |
1374 | ||
1375 | ||
1376 | /** | |
1377 | * Implementation of write() syscall. | |
1378 | * | |
fbefb1a8 MCC |
1379 | * @file: File structure. |
1380 | * @buf: Source buffer. | |
1381 | * @count: Size of source buffer. | |
1382 | * @ppos: Position in file (ignored). | |
1da177e4 LT |
1383 | * |
1384 | * @return Number of bytes read, or <0 on error. | |
1385 | */ | |
1386 | static ssize_t dvb_ca_en50221_io_write(struct file *file, | |
8ec6107a JJ |
1387 | const char __user *buf, size_t count, |
1388 | loff_t *ppos) | |
1da177e4 | 1389 | { |
0c53c70f JS |
1390 | struct dvb_device *dvbdev = file->private_data; |
1391 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1392 | u8 slot, connection_id; |
1393 | int status; | |
260f8d7c | 1394 | u8 fragbuf[HOST_LINK_BUF_SIZE]; |
1da177e4 LT |
1395 | int fragpos = 0; |
1396 | int fraglen; | |
1397 | unsigned long timeout; | |
1398 | int written; | |
1399 | ||
46b4f7c1 | 1400 | dprintk("%s\n", __func__); |
1da177e4 LT |
1401 | |
1402 | /* Incoming packet has a 2 byte header. hdr[0] = slot_id, hdr[1] = connection_id */ | |
1403 | if (count < 2) | |
1404 | return -EINVAL; | |
1405 | ||
1406 | /* extract slot & connection id */ | |
1407 | if (copy_from_user(&slot, buf, 1)) | |
1408 | return -EFAULT; | |
1409 | if (copy_from_user(&connection_id, buf + 1, 1)) | |
1410 | return -EFAULT; | |
1411 | buf += 2; | |
1412 | count -= 2; | |
1413 | ||
1414 | /* check if the slot is actually running */ | |
1415 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_RUNNING) | |
1416 | return -EINVAL; | |
1417 | ||
1418 | /* fragment the packets & store in the buffer */ | |
1419 | while (fragpos < count) { | |
1420 | fraglen = ca->slot_info[slot].link_buf_size - 2; | |
624f0c18 MCC |
1421 | if (fraglen < 0) |
1422 | break; | |
1423 | if (fraglen > HOST_LINK_BUF_SIZE - 2) | |
1424 | fraglen = HOST_LINK_BUF_SIZE - 2; | |
1da177e4 LT |
1425 | if ((count - fragpos) < fraglen) |
1426 | fraglen = count - fragpos; | |
1427 | ||
1428 | fragbuf[0] = connection_id; | |
1429 | fragbuf[1] = ((fragpos + fraglen) < count) ? 0x80 : 0x00; | |
e252984c DC |
1430 | status = copy_from_user(fragbuf + 2, buf + fragpos, fraglen); |
1431 | if (status) { | |
1432 | status = -EFAULT; | |
1da177e4 | 1433 | goto exit; |
e252984c | 1434 | } |
1da177e4 LT |
1435 | |
1436 | timeout = jiffies + HZ / 2; | |
1437 | written = 0; | |
1438 | while (!time_after(jiffies, timeout)) { | |
1439 | /* check the CAM hasn't been removed/reset in the meantime */ | |
1440 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_RUNNING) { | |
1441 | status = -EIO; | |
1442 | goto exit; | |
1443 | } | |
1444 | ||
d7e43844 | 1445 | mutex_lock(&ca->slot_info[slot].slot_lock); |
1da177e4 | 1446 | status = dvb_ca_en50221_write_data(ca, slot, fragbuf, fraglen + 2); |
d7e43844 | 1447 | mutex_unlock(&ca->slot_info[slot].slot_lock); |
1da177e4 LT |
1448 | if (status == (fraglen + 2)) { |
1449 | written = 1; | |
1450 | break; | |
1451 | } | |
1452 | if (status != -EAGAIN) | |
1453 | goto exit; | |
1454 | ||
1455 | msleep(1); | |
1456 | } | |
1457 | if (!written) { | |
1458 | status = -EIO; | |
1459 | goto exit; | |
1460 | } | |
1461 | ||
1462 | fragpos += fraglen; | |
1463 | } | |
1464 | status = count + 2; | |
1465 | ||
1466 | exit: | |
1467 | return status; | |
1468 | } | |
1469 | ||
1470 | ||
1471 | /** | |
1472 | * Condition for waking up in dvb_ca_en50221_io_read_condition | |
1473 | */ | |
ded92846 AQ |
1474 | static int dvb_ca_en50221_io_read_condition(struct dvb_ca_private *ca, |
1475 | int *result, int *_slot) | |
1da177e4 LT |
1476 | { |
1477 | int slot; | |
1478 | int slot_count = 0; | |
1479 | int idx; | |
ded92846 | 1480 | size_t fraglen; |
1da177e4 LT |
1481 | int connection_id = -1; |
1482 | int found = 0; | |
1483 | u8 hdr[2]; | |
1484 | ||
1485 | slot = ca->next_read_slot; | |
1486 | while ((slot_count < ca->slot_count) && (!found)) { | |
1487 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_RUNNING) | |
1488 | goto nextslot; | |
1489 | ||
1da177e4 | 1490 | if (ca->slot_info[slot].rx_buffer.data == NULL) { |
1da177e4 LT |
1491 | return 0; |
1492 | } | |
1493 | ||
1494 | idx = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, -1, &fraglen); | |
1495 | while (idx != -1) { | |
b0ba0e3a | 1496 | dvb_ringbuffer_pkt_read(&ca->slot_info[slot].rx_buffer, idx, 0, hdr, 2); |
1da177e4 LT |
1497 | if (connection_id == -1) |
1498 | connection_id = hdr[0]; | |
1499 | if ((hdr[0] == connection_id) && ((hdr[1] & 0x80) == 0)) { | |
1500 | *_slot = slot; | |
1501 | found = 1; | |
1502 | break; | |
1503 | } | |
1504 | ||
1505 | idx = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, idx, &fraglen); | |
1506 | } | |
1507 | ||
ded92846 | 1508 | nextslot: |
1da177e4 LT |
1509 | slot = (slot + 1) % ca->slot_count; |
1510 | slot_count++; | |
1511 | } | |
1512 | ||
1513 | ca->next_read_slot = slot; | |
1514 | return found; | |
1515 | } | |
1516 | ||
1517 | ||
1518 | /** | |
1519 | * Implementation of read() syscall. | |
1520 | * | |
fbefb1a8 MCC |
1521 | * @file: File structure. |
1522 | * @buf: Destination buffer. | |
1523 | * @count: Size of destination buffer. | |
1524 | * @ppos: Position in file (ignored). | |
1da177e4 LT |
1525 | * |
1526 | * @return Number of bytes read, or <0 on error. | |
1527 | */ | |
8ec6107a JJ |
1528 | static ssize_t dvb_ca_en50221_io_read(struct file *file, char __user *buf, |
1529 | size_t count, loff_t *ppos) | |
1da177e4 | 1530 | { |
0c53c70f JS |
1531 | struct dvb_device *dvbdev = file->private_data; |
1532 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1533 | int status; |
1534 | int result = 0; | |
1535 | u8 hdr[2]; | |
1536 | int slot; | |
1537 | int connection_id = -1; | |
1538 | size_t idx, idx2; | |
1539 | int last_fragment = 0; | |
1540 | size_t fraglen; | |
1541 | int pktlen; | |
1542 | int dispose = 0; | |
1543 | ||
46b4f7c1 | 1544 | dprintk("%s\n", __func__); |
1da177e4 LT |
1545 | |
1546 | /* Outgoing packet has a 2 byte header. hdr[0] = slot_id, hdr[1] = connection_id */ | |
1547 | if (count < 2) | |
1548 | return -EINVAL; | |
1549 | ||
1550 | /* wait for some data */ | |
1551 | if ((status = dvb_ca_en50221_io_read_condition(ca, &result, &slot)) == 0) { | |
1552 | ||
1553 | /* if we're in nonblocking mode, exit immediately */ | |
1554 | if (file->f_flags & O_NONBLOCK) | |
1555 | return -EWOULDBLOCK; | |
1556 | ||
1557 | /* wait for some data */ | |
1558 | status = wait_event_interruptible(ca->wait_queue, | |
1559 | dvb_ca_en50221_io_read_condition | |
1560 | (ca, &result, &slot)); | |
1561 | } | |
1562 | if ((status < 0) || (result < 0)) { | |
1563 | if (result) | |
1564 | return result; | |
1565 | return status; | |
1566 | } | |
1567 | ||
1568 | idx = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, -1, &fraglen); | |
1569 | pktlen = 2; | |
1570 | do { | |
1571 | if (idx == -1) { | |
b3ad24d2 MCC |
1572 | pr_err("dvb_ca adapter %d: BUG: read packet ended before last_fragment encountered\n", |
1573 | ca->dvbdev->adapter->num); | |
1da177e4 LT |
1574 | status = -EIO; |
1575 | goto exit; | |
1576 | } | |
1577 | ||
b0ba0e3a | 1578 | dvb_ringbuffer_pkt_read(&ca->slot_info[slot].rx_buffer, idx, 0, hdr, 2); |
1da177e4 LT |
1579 | if (connection_id == -1) |
1580 | connection_id = hdr[0]; | |
1581 | if (hdr[0] == connection_id) { | |
1582 | if (pktlen < count) { | |
1583 | if ((pktlen + fraglen - 2) > count) { | |
1584 | fraglen = count - pktlen; | |
1585 | } else { | |
1586 | fraglen -= 2; | |
1587 | } | |
1588 | ||
b0ba0e3a AV |
1589 | if ((status = dvb_ringbuffer_pkt_read_user(&ca->slot_info[slot].rx_buffer, idx, 2, |
1590 | buf + pktlen, fraglen)) < 0) { | |
1da177e4 LT |
1591 | goto exit; |
1592 | } | |
1593 | pktlen += fraglen; | |
1594 | } | |
1595 | ||
1596 | if ((hdr[1] & 0x80) == 0) | |
1597 | last_fragment = 1; | |
1598 | dispose = 1; | |
1599 | } | |
1600 | ||
1601 | idx2 = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, idx, &fraglen); | |
1602 | if (dispose) | |
1603 | dvb_ringbuffer_pkt_dispose(&ca->slot_info[slot].rx_buffer, idx); | |
1604 | idx = idx2; | |
1605 | dispose = 0; | |
1606 | } while (!last_fragment); | |
1607 | ||
1608 | hdr[0] = slot; | |
1609 | hdr[1] = connection_id; | |
e252984c DC |
1610 | status = copy_to_user(buf, hdr, 2); |
1611 | if (status) { | |
1612 | status = -EFAULT; | |
1da177e4 | 1613 | goto exit; |
e252984c | 1614 | } |
1da177e4 LT |
1615 | status = pktlen; |
1616 | ||
ded92846 | 1617 | exit: |
1da177e4 LT |
1618 | return status; |
1619 | } | |
1620 | ||
1621 | ||
1622 | /** | |
1623 | * Implementation of file open syscall. | |
1624 | * | |
fbefb1a8 MCC |
1625 | * @inode: Inode concerned. |
1626 | * @file: File concerned. | |
1da177e4 LT |
1627 | * |
1628 | * @return 0 on success, <0 on failure. | |
1629 | */ | |
1630 | static int dvb_ca_en50221_io_open(struct inode *inode, struct file *file) | |
1631 | { | |
0c53c70f JS |
1632 | struct dvb_device *dvbdev = file->private_data; |
1633 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1634 | int err; |
1635 | int i; | |
1636 | ||
46b4f7c1 | 1637 | dprintk("%s\n", __func__); |
1da177e4 LT |
1638 | |
1639 | if (!try_module_get(ca->pub->owner)) | |
1640 | return -EIO; | |
1641 | ||
1642 | err = dvb_generic_open(inode, file); | |
226835d7 MS |
1643 | if (err < 0) { |
1644 | module_put(ca->pub->owner); | |
1da177e4 | 1645 | return err; |
226835d7 | 1646 | } |
1da177e4 LT |
1647 | |
1648 | for (i = 0; i < ca->slot_count; i++) { | |
1649 | ||
1650 | if (ca->slot_info[i].slot_state == DVB_CA_SLOTSTATE_RUNNING) { | |
1da177e4 | 1651 | if (ca->slot_info[i].rx_buffer.data != NULL) { |
ded92846 AQ |
1652 | /* it is safe to call this here without locks because |
1653 | * ca->open == 0. Data is not read in this case */ | |
1da177e4 LT |
1654 | dvb_ringbuffer_flush(&ca->slot_info[i].rx_buffer); |
1655 | } | |
1da177e4 LT |
1656 | } |
1657 | } | |
1658 | ||
1659 | ca->open = 1; | |
1660 | dvb_ca_en50221_thread_update_delay(ca); | |
1661 | dvb_ca_en50221_thread_wakeup(ca); | |
1662 | ||
da677fe1 MK |
1663 | dvb_ca_private_get(ca); |
1664 | ||
1da177e4 LT |
1665 | return 0; |
1666 | } | |
1667 | ||
1668 | ||
1669 | /** | |
1670 | * Implementation of file close syscall. | |
1671 | * | |
fbefb1a8 MCC |
1672 | * @inode: Inode concerned. |
1673 | * @file: File concerned. | |
1da177e4 LT |
1674 | * |
1675 | * @return 0 on success, <0 on failure. | |
1676 | */ | |
1677 | static int dvb_ca_en50221_io_release(struct inode *inode, struct file *file) | |
1678 | { | |
0c53c70f JS |
1679 | struct dvb_device *dvbdev = file->private_data; |
1680 | struct dvb_ca_private *ca = dvbdev->priv; | |
0c12c1bf | 1681 | int err; |
1da177e4 | 1682 | |
46b4f7c1 | 1683 | dprintk("%s\n", __func__); |
1da177e4 LT |
1684 | |
1685 | /* mark the CA device as closed */ | |
1686 | ca->open = 0; | |
1687 | dvb_ca_en50221_thread_update_delay(ca); | |
1688 | ||
1689 | err = dvb_generic_release(inode, file); | |
1690 | ||
1691 | module_put(ca->pub->owner); | |
1692 | ||
da677fe1 MK |
1693 | dvb_ca_private_put(ca); |
1694 | ||
0c12c1bf | 1695 | return err; |
1da177e4 LT |
1696 | } |
1697 | ||
1698 | ||
1699 | /** | |
1700 | * Implementation of poll() syscall. | |
1701 | * | |
fbefb1a8 MCC |
1702 | * @file: File concerned. |
1703 | * @wait: poll wait table. | |
1da177e4 LT |
1704 | * |
1705 | * @return Standard poll mask. | |
1706 | */ | |
8ec6107a | 1707 | static unsigned int dvb_ca_en50221_io_poll(struct file *file, poll_table *wait) |
1da177e4 | 1708 | { |
0c53c70f JS |
1709 | struct dvb_device *dvbdev = file->private_data; |
1710 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1711 | unsigned int mask = 0; |
1712 | int slot; | |
1713 | int result = 0; | |
1714 | ||
46b4f7c1 | 1715 | dprintk("%s\n", __func__); |
1da177e4 LT |
1716 | |
1717 | if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) { | |
1da177e4 LT |
1718 | mask |= POLLIN; |
1719 | } | |
1720 | ||
1721 | /* if there is something, return now */ | |
1722 | if (mask) | |
1723 | return mask; | |
1724 | ||
1725 | /* wait for something to happen */ | |
1726 | poll_wait(file, &ca->wait_queue, wait); | |
1727 | ||
1728 | if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) { | |
1da177e4 LT |
1729 | mask |= POLLIN; |
1730 | } | |
1731 | ||
1732 | return mask; | |
1733 | } | |
1734 | EXPORT_SYMBOL(dvb_ca_en50221_init); | |
1735 | ||
1736 | ||
784e29d2 | 1737 | static const struct file_operations dvb_ca_fops = { |
1da177e4 LT |
1738 | .owner = THIS_MODULE, |
1739 | .read = dvb_ca_en50221_io_read, | |
1740 | .write = dvb_ca_en50221_io_write, | |
16ef8def | 1741 | .unlocked_ioctl = dvb_ca_en50221_io_ioctl, |
1da177e4 LT |
1742 | .open = dvb_ca_en50221_io_open, |
1743 | .release = dvb_ca_en50221_io_release, | |
1744 | .poll = dvb_ca_en50221_io_poll, | |
6038f373 | 1745 | .llseek = noop_llseek, |
1da177e4 LT |
1746 | }; |
1747 | ||
738a1b1e | 1748 | static const struct dvb_device dvbdev_ca = { |
1da177e4 LT |
1749 | .priv = NULL, |
1750 | .users = 1, | |
1751 | .readers = 1, | |
1752 | .writers = 1, | |
738a1b1e | 1753 | #if defined(CONFIG_MEDIA_CONTROLLER_DVB) |
e4fd3bc5 | 1754 | .name = "dvb-ca-en50221", |
738a1b1e | 1755 | #endif |
1da177e4 LT |
1756 | .fops = &dvb_ca_fops, |
1757 | }; | |
1758 | ||
1da177e4 LT |
1759 | /* ******************************************************************************** */ |
1760 | /* Initialisation/shutdown functions */ | |
1761 | ||
1762 | ||
1763 | /** | |
1764 | * Initialise a new DVB CA EN50221 interface device. | |
1765 | * | |
fbefb1a8 MCC |
1766 | * @dvb_adapter: DVB adapter to attach the new CA device to. |
1767 | * @ca: The dvb_ca instance. | |
1768 | * @flags: Flags describing the CA device (DVB_CA_FLAG_*). | |
1769 | * @slot_count: Number of slots supported. | |
1da177e4 LT |
1770 | * |
1771 | * @return 0 on success, nonzero on failure | |
1772 | */ | |
1773 | int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter, | |
1774 | struct dvb_ca_en50221 *pubca, int flags, int slot_count) | |
1775 | { | |
1776 | int ret; | |
1777 | struct dvb_ca_private *ca = NULL; | |
1778 | int i; | |
1779 | ||
46b4f7c1 | 1780 | dprintk("%s\n", __func__); |
1da177e4 LT |
1781 | |
1782 | if (slot_count < 1) | |
1783 | return -EINVAL; | |
1784 | ||
1785 | /* initialise the system data */ | |
7408187d | 1786 | if ((ca = kzalloc(sizeof(struct dvb_ca_private), GFP_KERNEL)) == NULL) { |
1da177e4 | 1787 | ret = -ENOMEM; |
a2bbf5d0 | 1788 | goto exit; |
1da177e4 | 1789 | } |
da677fe1 | 1790 | kref_init(&ca->refcount); |
1da177e4 LT |
1791 | ca->pub = pubca; |
1792 | ca->flags = flags; | |
1793 | ca->slot_count = slot_count; | |
7408187d | 1794 | if ((ca->slot_info = kcalloc(slot_count, sizeof(struct dvb_ca_slot), GFP_KERNEL)) == NULL) { |
1da177e4 | 1795 | ret = -ENOMEM; |
a2bbf5d0 | 1796 | goto free_ca; |
1da177e4 | 1797 | } |
1da177e4 | 1798 | init_waitqueue_head(&ca->wait_queue); |
1da177e4 LT |
1799 | ca->open = 0; |
1800 | ca->wakeup = 0; | |
1801 | ca->next_read_slot = 0; | |
1802 | pubca->private = ca; | |
1803 | ||
1804 | /* register the DVB device */ | |
df2f94e5 | 1805 | ret = dvb_register_device(dvb_adapter, &ca->dvbdev, &dvbdev_ca, ca, DVB_DEVICE_CA, 0); |
1da177e4 | 1806 | if (ret) |
a2bbf5d0 | 1807 | goto free_slot_info; |
1da177e4 LT |
1808 | |
1809 | /* now initialise each slot */ | |
1810 | for (i = 0; i < slot_count; i++) { | |
1811 | memset(&ca->slot_info[i], 0, sizeof(struct dvb_ca_slot)); | |
1812 | ca->slot_info[i].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1813 | atomic_set(&ca->slot_info[i].camchange_count, 0); | |
1814 | ca->slot_info[i].camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; | |
d7e43844 | 1815 | mutex_init(&ca->slot_info[i].slot_lock); |
1da177e4 LT |
1816 | } |
1817 | ||
30ad64b8 NS |
1818 | mutex_init(&ca->ioctl_mutex); |
1819 | ||
1da177e4 LT |
1820 | if (signal_pending(current)) { |
1821 | ret = -EINTR; | |
a2bbf5d0 | 1822 | goto unregister_device; |
1da177e4 LT |
1823 | } |
1824 | mb(); | |
1825 | ||
1826 | /* create a kthread for monitoring this CA device */ | |
9320874a CH |
1827 | ca->thread = kthread_run(dvb_ca_en50221_thread, ca, "kdvb-ca-%i:%i", |
1828 | ca->dvbdev->adapter->num, ca->dvbdev->id); | |
1829 | if (IS_ERR(ca->thread)) { | |
1830 | ret = PTR_ERR(ca->thread); | |
b3ad24d2 MCC |
1831 | pr_err("dvb_ca_init: failed to start kernel_thread (%d)\n", |
1832 | ret); | |
a2bbf5d0 | 1833 | goto unregister_device; |
1da177e4 | 1834 | } |
1da177e4 LT |
1835 | return 0; |
1836 | ||
a2bbf5d0 ME |
1837 | unregister_device: |
1838 | dvb_unregister_device(ca->dvbdev); | |
1839 | free_slot_info: | |
1840 | kfree(ca->slot_info); | |
1841 | free_ca: | |
1842 | kfree(ca); | |
1843 | exit: | |
1da177e4 LT |
1844 | pubca->private = NULL; |
1845 | return ret; | |
1846 | } | |
1847 | EXPORT_SYMBOL(dvb_ca_en50221_release); | |
1848 | ||
1849 | ||
1850 | ||
1851 | /** | |
1852 | * Release a DVB CA EN50221 interface device. | |
1853 | * | |
fbefb1a8 MCC |
1854 | * @ca_dev: The dvb_device_t instance for the CA device. |
1855 | * @ca: The associated dvb_ca instance. | |
1da177e4 LT |
1856 | */ |
1857 | void dvb_ca_en50221_release(struct dvb_ca_en50221 *pubca) | |
1858 | { | |
0c53c70f | 1859 | struct dvb_ca_private *ca = pubca->private; |
1da177e4 LT |
1860 | int i; |
1861 | ||
46b4f7c1 | 1862 | dprintk("%s\n", __func__); |
1da177e4 LT |
1863 | |
1864 | /* shutdown the thread if there was one */ | |
9320874a | 1865 | kthread_stop(ca->thread); |
1da177e4 LT |
1866 | |
1867 | for (i = 0; i < ca->slot_count; i++) { | |
1868 | dvb_ca_en50221_slot_shutdown(ca, i); | |
1869 | } | |
4d5030b6 | 1870 | dvb_remove_device(ca->dvbdev); |
da677fe1 | 1871 | dvb_ca_private_put(ca); |
1da177e4 LT |
1872 | pubca->private = NULL; |
1873 | } |