Commit | Line | Data |
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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 | 39 | |
fada1935 MCC |
40 | #include <media/dvb_ca_en50221.h> |
41 | #include <media/dvb_ringbuffer.h> | |
1da177e4 LT |
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 */ | |
1da177e4 LT |
79 | |
80 | #define DVB_CA_SLOTSTATE_NONE 0 | |
81 | #define DVB_CA_SLOTSTATE_UNINITIALISED 1 | |
82 | #define DVB_CA_SLOTSTATE_RUNNING 2 | |
83 | #define DVB_CA_SLOTSTATE_INVALID 3 | |
84 | #define DVB_CA_SLOTSTATE_WAITREADY 4 | |
85 | #define DVB_CA_SLOTSTATE_VALIDATE 5 | |
86 | #define DVB_CA_SLOTSTATE_WAITFR 6 | |
87 | #define DVB_CA_SLOTSTATE_LINKINIT 7 | |
88 | ||
1da177e4 LT |
89 | /* Information on a CA slot */ |
90 | struct dvb_ca_slot { | |
1da177e4 LT |
91 | /* current state of the CAM */ |
92 | int slot_state; | |
93 | ||
d7e43844 MD |
94 | /* mutex used for serializing access to one CI slot */ |
95 | struct mutex slot_lock; | |
96 | ||
1da177e4 LT |
97 | /* Number of CAMCHANGES that have occurred since last processing */ |
98 | atomic_t camchange_count; | |
99 | ||
100 | /* Type of last CAMCHANGE */ | |
101 | int camchange_type; | |
102 | ||
103 | /* base address of CAM config */ | |
104 | u32 config_base; | |
105 | ||
106 | /* value to write into Config Control register */ | |
107 | u8 config_option; | |
108 | ||
109 | /* if 1, the CAM supports DA IRQs */ | |
110 | u8 da_irq_supported:1; | |
111 | ||
112 | /* size of the buffer to use when talking to the CAM */ | |
113 | int link_buf_size; | |
114 | ||
1da177e4 LT |
115 | /* buffer for incoming packets */ |
116 | struct dvb_ringbuffer rx_buffer; | |
117 | ||
118 | /* timer used during various states of the slot */ | |
119 | unsigned long timeout; | |
120 | }; | |
121 | ||
122 | /* Private CA-interface information */ | |
123 | struct dvb_ca_private { | |
da677fe1 | 124 | struct kref refcount; |
1da177e4 LT |
125 | |
126 | /* pointer back to the public data structure */ | |
127 | struct dvb_ca_en50221 *pub; | |
128 | ||
129 | /* the DVB device */ | |
130 | struct dvb_device *dvbdev; | |
131 | ||
132 | /* Flags describing the interface (DVB_CA_FLAG_*) */ | |
133 | u32 flags; | |
134 | ||
135 | /* number of slots supported by this CA interface */ | |
136 | unsigned int slot_count; | |
137 | ||
138 | /* information on each slot */ | |
139 | struct dvb_ca_slot *slot_info; | |
140 | ||
141 | /* wait queues for read() and write() operations */ | |
142 | wait_queue_head_t wait_queue; | |
143 | ||
144 | /* PID of the monitoring thread */ | |
9320874a | 145 | struct task_struct *thread; |
1da177e4 LT |
146 | |
147 | /* Flag indicating if the CA device is open */ | |
148 | unsigned int open:1; | |
149 | ||
150 | /* Flag indicating the thread should wake up now */ | |
151 | unsigned int wakeup:1; | |
152 | ||
153 | /* Delay the main thread should use */ | |
154 | unsigned long delay; | |
155 | ||
96375b7a JJ |
156 | /* |
157 | * Slot to start looking for data to read from in the next user-space | |
158 | * read operation | |
159 | */ | |
1da177e4 | 160 | int next_read_slot; |
30ad64b8 NS |
161 | |
162 | /* mutex serializing ioctls */ | |
163 | struct mutex ioctl_mutex; | |
1da177e4 LT |
164 | }; |
165 | ||
bd3df3c5 MK |
166 | static void dvb_ca_private_free(struct dvb_ca_private *ca) |
167 | { | |
168 | unsigned int i; | |
169 | ||
4d5030b6 | 170 | dvb_free_device(ca->dvbdev); |
bd3df3c5 MK |
171 | for (i = 0; i < ca->slot_count; i++) |
172 | vfree(ca->slot_info[i].rx_buffer.data); | |
173 | ||
174 | kfree(ca->slot_info); | |
175 | kfree(ca); | |
176 | } | |
177 | ||
da677fe1 MK |
178 | static void dvb_ca_private_release(struct kref *ref) |
179 | { | |
fbabbddd JJ |
180 | struct dvb_ca_private *ca; |
181 | ||
182 | ca = container_of(ref, struct dvb_ca_private, refcount); | |
da677fe1 MK |
183 | dvb_ca_private_free(ca); |
184 | } | |
185 | ||
186 | static void dvb_ca_private_get(struct dvb_ca_private *ca) | |
187 | { | |
188 | kref_get(&ca->refcount); | |
189 | } | |
190 | ||
191 | static void dvb_ca_private_put(struct dvb_ca_private *ca) | |
192 | { | |
193 | kref_put(&ca->refcount, dvb_ca_private_release); | |
194 | } | |
195 | ||
1da177e4 | 196 | static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca); |
8ec6107a JJ |
197 | static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, |
198 | u8 *ebuf, int ecount); | |
199 | static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, | |
200 | u8 *ebuf, int ecount); | |
1da177e4 | 201 | |
1da177e4 LT |
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. | |
46e42a30 | 209 | * return: Pointer into haystack needle was found at, or NULL if not found. |
1da177e4 | 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 | ||
96375b7a | 226 | /* ************************************************************************** */ |
1da177e4 LT |
227 | /* EN50221 physical interface functions */ |
228 | ||
46e42a30 | 229 | /* |
fbefb1a8 | 230 | * dvb_ca_en50221_check_camstatus - Check CAM status. |
1da177e4 LT |
231 | */ |
232 | static int dvb_ca_en50221_check_camstatus(struct dvb_ca_private *ca, int slot) | |
233 | { | |
a75aa90c | 234 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
235 | int slot_status; |
236 | int cam_present_now; | |
237 | int cam_changed; | |
238 | ||
239 | /* IRQ mode */ | |
7bd8cc8f | 240 | if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE) |
a75aa90c | 241 | return (atomic_read(&sl->camchange_count) != 0); |
1da177e4 LT |
242 | |
243 | /* poll mode */ | |
244 | slot_status = ca->pub->poll_slot_status(ca->pub, slot, ca->open); | |
245 | ||
246 | cam_present_now = (slot_status & DVB_CA_EN50221_POLL_CAM_PRESENT) ? 1 : 0; | |
247 | cam_changed = (slot_status & DVB_CA_EN50221_POLL_CAM_CHANGED) ? 1 : 0; | |
248 | if (!cam_changed) { | |
a75aa90c JJ |
249 | int cam_present_old = (sl->slot_state != DVB_CA_SLOTSTATE_NONE); |
250 | ||
1da177e4 LT |
251 | cam_changed = (cam_present_now != cam_present_old); |
252 | } | |
253 | ||
254 | if (cam_changed) { | |
7bd8cc8f | 255 | if (!cam_present_now) |
a75aa90c | 256 | sl->camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; |
7bd8cc8f | 257 | else |
a75aa90c | 258 | sl->camchange_type = DVB_CA_EN50221_CAMCHANGE_INSERTED; |
a75aa90c | 259 | atomic_set(&sl->camchange_count, 1); |
1da177e4 | 260 | } else { |
a75aa90c | 261 | if ((sl->slot_state == DVB_CA_SLOTSTATE_WAITREADY) && |
1da177e4 | 262 | (slot_status & DVB_CA_EN50221_POLL_CAM_READY)) { |
224457a9 | 263 | /* move to validate state if reset is completed */ |
a75aa90c | 264 | sl->slot_state = DVB_CA_SLOTSTATE_VALIDATE; |
1da177e4 LT |
265 | } |
266 | } | |
267 | ||
268 | return cam_changed; | |
269 | } | |
270 | ||
1da177e4 | 271 | /** |
fbefb1a8 MCC |
272 | * dvb_ca_en50221_wait_if_status - Wait for flags to become set on the STATUS |
273 | * register on a CAM interface, checking for errors and timeout. | |
1da177e4 | 274 | * |
fbefb1a8 MCC |
275 | * @ca: CA instance. |
276 | * @slot: Slot on interface. | |
277 | * @waitfor: Flags to wait for. | |
46e42a30 | 278 | * @timeout_hz: Timeout in milliseconds. |
1da177e4 | 279 | * |
46e42a30 | 280 | * return: 0 on success, nonzero on error. |
1da177e4 LT |
281 | */ |
282 | static int dvb_ca_en50221_wait_if_status(struct dvb_ca_private *ca, int slot, | |
283 | u8 waitfor, int timeout_hz) | |
284 | { | |
285 | unsigned long timeout; | |
286 | unsigned long start; | |
287 | ||
46b4f7c1 | 288 | dprintk("%s\n", __func__); |
1da177e4 LT |
289 | |
290 | /* loop until timeout elapsed */ | |
291 | start = jiffies; | |
292 | timeout = jiffies + timeout_hz; | |
293 | while (1) { | |
fbabbddd JJ |
294 | int res; |
295 | ||
1da177e4 | 296 | /* read the status and check for error */ |
fbabbddd | 297 | res = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
1da177e4 LT |
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 */ | |
7bd8cc8f | 309 | if (time_after(jiffies, timeout)) |
1da177e4 | 310 | break; |
1da177e4 LT |
311 | |
312 | /* wait for a bit */ | |
b9af29e1 | 313 | usleep_range(1000, 1100); |
1da177e4 LT |
314 | } |
315 | ||
46b4f7c1 | 316 | dprintk("%s failed timeout:%lu\n", __func__, jiffies - start); |
1da177e4 LT |
317 | |
318 | /* if we get here, we've timed out */ | |
319 | return -ETIMEDOUT; | |
320 | } | |
321 | ||
1da177e4 | 322 | /** |
fbefb1a8 | 323 | * dvb_ca_en50221_link_init - Initialise the link layer connection to a CAM. |
1da177e4 | 324 | * |
fbefb1a8 MCC |
325 | * @ca: CA instance. |
326 | * @slot: Slot id. | |
1da177e4 | 327 | * |
46e42a30 | 328 | * return: 0 on success, nonzero on failure. |
1da177e4 LT |
329 | */ |
330 | static int dvb_ca_en50221_link_init(struct dvb_ca_private *ca, int slot) | |
331 | { | |
a75aa90c | 332 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
333 | int ret; |
334 | int buf_size; | |
335 | u8 buf[2]; | |
336 | ||
46b4f7c1 | 337 | dprintk("%s\n", __func__); |
1da177e4 LT |
338 | |
339 | /* we'll be determining these during this function */ | |
a75aa90c | 340 | sl->da_irq_supported = 0; |
1da177e4 | 341 | |
a1ca23d1 JJ |
342 | /* |
343 | * set the host link buffer size temporarily. it will be overwritten | |
344 | * with the real negotiated size later. | |
345 | */ | |
a75aa90c | 346 | sl->link_buf_size = 2; |
1da177e4 LT |
347 | |
348 | /* read the buffer size from the CAM */ | |
bacba9e5 JJ |
349 | ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, |
350 | IRQEN | CMDREG_SR); | |
351 | if (ret) | |
1da177e4 | 352 | return ret; |
5dbddc99 | 353 | ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_DA, HZ); |
bacba9e5 | 354 | if (ret) |
1da177e4 | 355 | return ret; |
bacba9e5 JJ |
356 | ret = dvb_ca_en50221_read_data(ca, slot, buf, 2); |
357 | if (ret != 2) | |
1da177e4 | 358 | return -EIO; |
bacba9e5 JJ |
359 | ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN); |
360 | if (ret) | |
1da177e4 LT |
361 | return ret; |
362 | ||
96375b7a JJ |
363 | /* |
364 | * store it, and choose the minimum of our buffer and the CAM's buffer | |
365 | * size | |
366 | */ | |
1da177e4 LT |
367 | buf_size = (buf[0] << 8) | buf[1]; |
368 | if (buf_size > HOST_LINK_BUF_SIZE) | |
369 | buf_size = HOST_LINK_BUF_SIZE; | |
a75aa90c | 370 | sl->link_buf_size = buf_size; |
1da177e4 LT |
371 | buf[0] = buf_size >> 8; |
372 | buf[1] = buf_size & 0xff; | |
373 | dprintk("Chosen link buffer size of %i\n", buf_size); | |
374 | ||
375 | /* write the buffer size to the CAM */ | |
bacba9e5 JJ |
376 | ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, |
377 | IRQEN | CMDREG_SW); | |
378 | if (ret) | |
1da177e4 | 379 | return ret; |
bacba9e5 JJ |
380 | ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_FR, HZ / 10); |
381 | if (ret) | |
1da177e4 | 382 | return ret; |
bacba9e5 JJ |
383 | ret = dvb_ca_en50221_write_data(ca, slot, buf, 2); |
384 | if (ret != 2) | |
1da177e4 | 385 | return -EIO; |
bacba9e5 JJ |
386 | ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN); |
387 | if (ret) | |
1da177e4 LT |
388 | return ret; |
389 | ||
390 | /* success */ | |
391 | return 0; | |
392 | } | |
393 | ||
394 | /** | |
fbefb1a8 | 395 | * dvb_ca_en50221_read_tuple - Read a tuple from attribute memory. |
1da177e4 | 396 | * |
fbefb1a8 MCC |
397 | * @ca: CA instance. |
398 | * @slot: Slot id. | |
399 | * @address: Address to read from. Updated. | |
46e42a30 MCC |
400 | * @tuple_type: Tuple id byte. Updated. |
401 | * @tuple_length: Tuple length. Updated. | |
fbefb1a8 | 402 | * @tuple: Dest buffer for tuple (must be 256 bytes). Updated. |
1da177e4 | 403 | * |
46e42a30 | 404 | * return: 0 on success, nonzero on error. |
1da177e4 LT |
405 | */ |
406 | static int dvb_ca_en50221_read_tuple(struct dvb_ca_private *ca, int slot, | |
bacba9e5 JJ |
407 | int *address, int *tuple_type, |
408 | int *tuple_length, u8 *tuple) | |
1da177e4 LT |
409 | { |
410 | int i; | |
bacba9e5 JJ |
411 | int _tuple_type; |
412 | int _tuple_length; | |
1da177e4 LT |
413 | int _address = *address; |
414 | ||
415 | /* grab the next tuple length and type */ | |
bacba9e5 JJ |
416 | _tuple_type = ca->pub->read_attribute_mem(ca->pub, slot, _address); |
417 | if (_tuple_type < 0) | |
418 | return _tuple_type; | |
419 | if (_tuple_type == 0xff) { | |
420 | dprintk("END OF CHAIN TUPLE type:0x%x\n", _tuple_type); | |
1da177e4 | 421 | *address += 2; |
bacba9e5 JJ |
422 | *tuple_type = _tuple_type; |
423 | *tuple_length = 0; | |
1da177e4 LT |
424 | return 0; |
425 | } | |
bacba9e5 JJ |
426 | _tuple_length = ca->pub->read_attribute_mem(ca->pub, slot, |
427 | _address + 2); | |
428 | if (_tuple_length < 0) | |
429 | return _tuple_length; | |
1da177e4 LT |
430 | _address += 4; |
431 | ||
bacba9e5 | 432 | dprintk("TUPLE type:0x%x length:%i\n", _tuple_type, _tuple_length); |
1da177e4 LT |
433 | |
434 | /* read in the whole tuple */ | |
bacba9e5 | 435 | for (i = 0; i < _tuple_length; i++) { |
96375b7a JJ |
436 | tuple[i] = ca->pub->read_attribute_mem(ca->pub, slot, |
437 | _address + (i * 2)); | |
1da177e4 LT |
438 | dprintk(" 0x%02x: 0x%02x %c\n", |
439 | i, tuple[i] & 0xff, | |
440 | ((tuple[i] > 31) && (tuple[i] < 127)) ? tuple[i] : '.'); | |
441 | } | |
bacba9e5 | 442 | _address += (_tuple_length * 2); |
1da177e4 | 443 | |
224457a9 | 444 | /* success */ |
bacba9e5 JJ |
445 | *tuple_type = _tuple_type; |
446 | *tuple_length = _tuple_length; | |
1da177e4 LT |
447 | *address = _address; |
448 | return 0; | |
449 | } | |
450 | ||
1da177e4 | 451 | /** |
fbefb1a8 MCC |
452 | * dvb_ca_en50221_parse_attributes - Parse attribute memory of a CAM module, |
453 | * extracting Config register, and checking it is a DVB CAM module. | |
1da177e4 | 454 | * |
fbefb1a8 MCC |
455 | * @ca: CA instance. |
456 | * @slot: Slot id. | |
1da177e4 | 457 | * |
46e42a30 | 458 | * return: 0 on success, <0 on failure. |
1da177e4 LT |
459 | */ |
460 | static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot) | |
461 | { | |
a75aa90c | 462 | struct dvb_ca_slot *sl; |
1da177e4 | 463 | int address = 0; |
bacba9e5 JJ |
464 | int tuple_length; |
465 | int tuple_type; | |
1da177e4 LT |
466 | u8 tuple[257]; |
467 | char *dvb_str; | |
468 | int rasz; | |
469 | int status; | |
470 | int got_cftableentry = 0; | |
471 | int end_chain = 0; | |
472 | int i; | |
473 | u16 manfid = 0; | |
474 | u16 devid = 0; | |
475 | ||
224457a9 | 476 | /* CISTPL_DEVICE_0A */ |
bacba9e5 JJ |
477 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, |
478 | &tuple_length, tuple); | |
479 | if (status < 0) | |
1da177e4 | 480 | return status; |
bacba9e5 | 481 | if (tuple_type != 0x1D) |
1da177e4 LT |
482 | return -EINVAL; |
483 | ||
224457a9 | 484 | /* CISTPL_DEVICE_0C */ |
bacba9e5 JJ |
485 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, |
486 | &tuple_length, tuple); | |
487 | if (status < 0) | |
1da177e4 | 488 | return status; |
bacba9e5 | 489 | if (tuple_type != 0x1C) |
1da177e4 LT |
490 | return -EINVAL; |
491 | ||
224457a9 | 492 | /* CISTPL_VERS_1 */ |
bacba9e5 JJ |
493 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, |
494 | &tuple_length, tuple); | |
495 | if (status < 0) | |
1da177e4 | 496 | return status; |
bacba9e5 | 497 | if (tuple_type != 0x15) |
1da177e4 LT |
498 | return -EINVAL; |
499 | ||
224457a9 | 500 | /* CISTPL_MANFID */ |
bacba9e5 JJ |
501 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, |
502 | &tuple_length, tuple); | |
503 | if (status < 0) | |
1da177e4 | 504 | return status; |
bacba9e5 | 505 | if (tuple_type != 0x20) |
1da177e4 | 506 | return -EINVAL; |
bacba9e5 | 507 | if (tuple_length != 4) |
1da177e4 LT |
508 | return -EINVAL; |
509 | manfid = (tuple[1] << 8) | tuple[0]; | |
510 | devid = (tuple[3] << 8) | tuple[2]; | |
511 | ||
224457a9 | 512 | /* CISTPL_CONFIG */ |
bacba9e5 JJ |
513 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, |
514 | &tuple_length, tuple); | |
515 | if (status < 0) | |
1da177e4 | 516 | return status; |
bacba9e5 | 517 | if (tuple_type != 0x1A) |
1da177e4 | 518 | return -EINVAL; |
bacba9e5 | 519 | if (tuple_length < 3) |
1da177e4 LT |
520 | return -EINVAL; |
521 | ||
522 | /* extract the configbase */ | |
523 | rasz = tuple[0] & 3; | |
bacba9e5 | 524 | if (tuple_length < (3 + rasz + 14)) |
1da177e4 | 525 | return -EINVAL; |
a75aa90c JJ |
526 | sl = &ca->slot_info[slot]; |
527 | sl->config_base = 0; | |
528 | for (i = 0; i < rasz + 1; i++) | |
529 | sl->config_base |= (tuple[2 + i] << (8 * i)); | |
1da177e4 LT |
530 | |
531 | /* check it contains the correct DVB string */ | |
bacba9e5 | 532 | dvb_str = findstr((char *)tuple, tuple_length, "DVB_CI_V", 8); |
13b51648 | 533 | if (!dvb_str) |
1da177e4 | 534 | return -EINVAL; |
bacba9e5 | 535 | if (tuple_length < ((dvb_str - (char *)tuple) + 12)) |
1da177e4 LT |
536 | return -EINVAL; |
537 | ||
538 | /* is it a version we support? */ | |
539 | if (strncmp(dvb_str + 8, "1.00", 4)) { | |
b3ad24d2 MCC |
540 | pr_err("dvb_ca adapter %d: Unsupported DVB CAM module version %c%c%c%c\n", |
541 | ca->dvbdev->adapter->num, dvb_str[8], dvb_str[9], | |
542 | dvb_str[10], dvb_str[11]); | |
1da177e4 LT |
543 | return -EINVAL; |
544 | } | |
545 | ||
546 | /* process the CFTABLE_ENTRY tuples, and any after those */ | |
547 | while ((!end_chain) && (address < 0x1000)) { | |
bacba9e5 JJ |
548 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, |
549 | &tuple_type, &tuple_length, | |
550 | tuple); | |
551 | if (status < 0) | |
1da177e4 | 552 | return status; |
bacba9e5 | 553 | switch (tuple_type) { |
224457a9 | 554 | case 0x1B: /* CISTPL_CFTABLE_ENTRY */ |
bacba9e5 | 555 | if (tuple_length < (2 + 11 + 17)) |
1da177e4 LT |
556 | break; |
557 | ||
558 | /* if we've already parsed one, just use it */ | |
559 | if (got_cftableentry) | |
560 | break; | |
561 | ||
562 | /* get the config option */ | |
a75aa90c | 563 | sl->config_option = tuple[0] & 0x3f; |
1da177e4 LT |
564 | |
565 | /* OK, check it contains the correct strings */ | |
bacba9e5 JJ |
566 | if (!findstr((char *)tuple, tuple_length, |
567 | "DVB_HOST", 8) || | |
568 | !findstr((char *)tuple, tuple_length, | |
569 | "DVB_CI_MODULE", 13)) | |
1da177e4 LT |
570 | break; |
571 | ||
572 | got_cftableentry = 1; | |
573 | break; | |
574 | ||
224457a9 | 575 | case 0x14: /* CISTPL_NO_LINK */ |
1da177e4 LT |
576 | break; |
577 | ||
224457a9 | 578 | case 0xFF: /* CISTPL_END */ |
1da177e4 LT |
579 | end_chain = 1; |
580 | break; | |
581 | ||
96375b7a | 582 | default: /* Unknown tuple type - just skip this tuple */ |
b3ad24d2 | 583 | dprintk("dvb_ca: Skipping unknown tuple type:0x%x length:0x%x\n", |
bacba9e5 | 584 | tuple_type, tuple_length); |
1da177e4 LT |
585 | break; |
586 | } | |
587 | } | |
588 | ||
589 | if ((address > 0x1000) || (!got_cftableentry)) | |
590 | return -EINVAL; | |
591 | ||
592 | dprintk("Valid DVB CAM detected MANID:%x DEVID:%x CONFIGBASE:0x%x CONFIGOPTION:0x%x\n", | |
a75aa90c | 593 | manfid, devid, sl->config_base, sl->config_option); |
1da177e4 | 594 | |
224457a9 | 595 | /* success! */ |
1da177e4 LT |
596 | return 0; |
597 | } | |
598 | ||
1da177e4 | 599 | /** |
fbefb1a8 | 600 | * dvb_ca_en50221_set_configoption - Set CAM's configoption correctly. |
1da177e4 | 601 | * |
fbefb1a8 MCC |
602 | * @ca: CA instance. |
603 | * @slot: Slot containing the CAM. | |
1da177e4 LT |
604 | */ |
605 | static int dvb_ca_en50221_set_configoption(struct dvb_ca_private *ca, int slot) | |
606 | { | |
a75aa90c | 607 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
608 | int configoption; |
609 | ||
46b4f7c1 | 610 | dprintk("%s\n", __func__); |
1da177e4 LT |
611 | |
612 | /* set the config option */ | |
a75aa90c JJ |
613 | ca->pub->write_attribute_mem(ca->pub, slot, sl->config_base, |
614 | sl->config_option); | |
1da177e4 LT |
615 | |
616 | /* check it */ | |
a75aa90c JJ |
617 | configoption = ca->pub->read_attribute_mem(ca->pub, slot, |
618 | sl->config_base); | |
1da177e4 | 619 | dprintk("Set configoption 0x%x, read configoption 0x%x\n", |
a75aa90c | 620 | sl->config_option, configoption & 0x3f); |
1da177e4 LT |
621 | |
622 | /* fine! */ | |
623 | return 0; | |
1da177e4 LT |
624 | } |
625 | ||
1da177e4 | 626 | /** |
fbefb1a8 MCC |
627 | * dvb_ca_en50221_read_data - This function talks to an EN50221 CAM control |
628 | * interface. It reads a buffer of data from the CAM. The data can either | |
629 | * be stored in a supplied buffer, or automatically be added to the slot's | |
630 | * rx_buffer. | |
1da177e4 | 631 | * |
fbefb1a8 MCC |
632 | * @ca: CA instance. |
633 | * @slot: Slot to read from. | |
634 | * @ebuf: If non-NULL, the data will be written to this buffer. If NULL, | |
46e42a30 MCC |
635 | * the data will be added into the buffering system as a normal |
636 | * fragment. | |
fbefb1a8 | 637 | * @ecount: Size of ebuf. Ignored if ebuf is NULL. |
1da177e4 | 638 | * |
46e42a30 | 639 | * return: Number of bytes read, or < 0 on error |
1da177e4 | 640 | */ |
8ec6107a JJ |
641 | static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, |
642 | u8 *ebuf, int ecount) | |
1da177e4 | 643 | { |
a75aa90c | 644 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
645 | int bytes_read; |
646 | int status; | |
647 | u8 buf[HOST_LINK_BUF_SIZE]; | |
648 | int i; | |
649 | ||
46b4f7c1 | 650 | dprintk("%s\n", __func__); |
1da177e4 LT |
651 | |
652 | /* check if we have space for a link buf in the rx_buffer */ | |
13b51648 | 653 | if (!ebuf) { |
1da177e4 LT |
654 | int buf_free; |
655 | ||
a75aa90c | 656 | if (!sl->rx_buffer.data) { |
1da177e4 LT |
657 | status = -EIO; |
658 | goto exit; | |
659 | } | |
a75aa90c | 660 | buf_free = dvb_ringbuffer_free(&sl->rx_buffer); |
1da177e4 | 661 | |
a75aa90c | 662 | if (buf_free < (sl->link_buf_size + |
f894165c | 663 | DVB_RINGBUFFER_PKTHDRSIZE)) { |
1da177e4 LT |
664 | status = -EAGAIN; |
665 | goto exit; | |
666 | } | |
667 | } | |
668 | ||
f894165c | 669 | if (ca->pub->read_data && |
a75aa90c | 670 | (sl->slot_state != DVB_CA_SLOTSTATE_LINKINIT)) { |
13b51648 | 671 | if (!ebuf) |
f894165c RM |
672 | status = ca->pub->read_data(ca->pub, slot, buf, |
673 | sizeof(buf)); | |
674 | else | |
675 | status = ca->pub->read_data(ca->pub, slot, buf, ecount); | |
676 | if (status < 0) | |
677 | return status; | |
678 | bytes_read = status; | |
679 | if (status == 0) | |
680 | goto exit; | |
681 | } else { | |
f894165c RM |
682 | /* check if there is data available */ |
683 | status = ca->pub->read_cam_control(ca->pub, slot, | |
684 | CTRLIF_STATUS); | |
685 | if (status < 0) | |
1da177e4 | 686 | goto exit; |
f894165c RM |
687 | if (!(status & STATUSREG_DA)) { |
688 | /* no data */ | |
689 | status = 0; | |
1da177e4 LT |
690 | goto exit; |
691 | } | |
f894165c RM |
692 | |
693 | /* read the amount of data */ | |
694 | status = ca->pub->read_cam_control(ca->pub, slot, | |
695 | CTRLIF_SIZE_HIGH); | |
696 | if (status < 0) | |
697 | goto exit; | |
698 | bytes_read = status << 8; | |
699 | status = ca->pub->read_cam_control(ca->pub, slot, | |
700 | CTRLIF_SIZE_LOW); | |
701 | if (status < 0) | |
1da177e4 | 702 | goto exit; |
f894165c RM |
703 | bytes_read |= status; |
704 | ||
705 | /* check it will fit */ | |
13b51648 | 706 | if (!ebuf) { |
a75aa90c | 707 | if (bytes_read > sl->link_buf_size) { |
f894165c RM |
708 | pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the link buffer size (%i > %i)!\n", |
709 | ca->dvbdev->adapter->num, bytes_read, | |
a75aa90c JJ |
710 | sl->link_buf_size); |
711 | sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
f894165c RM |
712 | status = -EIO; |
713 | goto exit; | |
714 | } | |
715 | if (bytes_read < 2) { | |
716 | pr_err("dvb_ca adapter %d: CAM sent a buffer that was less than 2 bytes!\n", | |
717 | ca->dvbdev->adapter->num); | |
a75aa90c | 718 | sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; |
f894165c RM |
719 | status = -EIO; |
720 | goto exit; | |
721 | } | |
722 | } else { | |
723 | if (bytes_read > ecount) { | |
724 | pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the ecount size!\n", | |
725 | ca->dvbdev->adapter->num); | |
726 | status = -EIO; | |
727 | goto exit; | |
728 | } | |
1da177e4 | 729 | } |
1da177e4 | 730 | |
f894165c RM |
731 | /* fill the buffer */ |
732 | for (i = 0; i < bytes_read; i++) { | |
733 | /* read byte and check */ | |
734 | status = ca->pub->read_cam_control(ca->pub, slot, | |
735 | CTRLIF_DATA); | |
736 | if (status < 0) | |
737 | goto exit; | |
1da177e4 | 738 | |
f894165c RM |
739 | /* OK, store it in the buffer */ |
740 | buf[i] = status; | |
741 | } | |
1da177e4 | 742 | |
f894165c RM |
743 | /* check for read error (RE should now be 0) */ |
744 | status = ca->pub->read_cam_control(ca->pub, slot, | |
745 | CTRLIF_STATUS); | |
746 | if (status < 0) | |
747 | goto exit; | |
748 | if (status & STATUSREG_RE) { | |
a75aa90c | 749 | sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; |
f894165c RM |
750 | status = -EIO; |
751 | goto exit; | |
752 | } | |
1da177e4 LT |
753 | } |
754 | ||
96375b7a JJ |
755 | /* |
756 | * OK, add it to the receive buffer, or copy into external buffer if | |
757 | * supplied | |
758 | */ | |
13b51648 | 759 | if (!ebuf) { |
a75aa90c | 760 | if (!sl->rx_buffer.data) { |
1da177e4 LT |
761 | status = -EIO; |
762 | goto exit; | |
763 | } | |
a75aa90c | 764 | dvb_ringbuffer_pkt_write(&sl->rx_buffer, buf, bytes_read); |
1da177e4 LT |
765 | } else { |
766 | memcpy(ebuf, buf, bytes_read); | |
767 | } | |
768 | ||
769 | dprintk("Received CA packet for slot %i connection id 0x%x last_frag:%i size:0x%x\n", slot, | |
770 | buf[0], (buf[1] & 0x80) == 0, bytes_read); | |
771 | ||
772 | /* wake up readers when a last_fragment is received */ | |
7bd8cc8f | 773 | if ((buf[1] & 0x80) == 0x00) |
1da177e4 | 774 | wake_up_interruptible(&ca->wait_queue); |
7bd8cc8f | 775 | |
1da177e4 LT |
776 | status = bytes_read; |
777 | ||
778 | exit: | |
779 | return status; | |
780 | } | |
781 | ||
1da177e4 | 782 | /** |
fbefb1a8 MCC |
783 | * dvb_ca_en50221_write_data - This function talks to an EN50221 CAM control |
784 | * interface. It writes a buffer of data to a CAM. | |
1da177e4 | 785 | * |
fbefb1a8 MCC |
786 | * @ca: CA instance. |
787 | * @slot: Slot to write to. | |
46e42a30 | 788 | * @buf: The data in this buffer is treated as a complete link-level packet to |
4a3fad70 | 789 | * be written. |
46e42a30 | 790 | * @bytes_write: Size of ebuf. |
1da177e4 | 791 | * |
46e42a30 | 792 | * return: Number of bytes written, or < 0 on error. |
1da177e4 | 793 | */ |
8ec6107a JJ |
794 | static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, |
795 | u8 *buf, int bytes_write) | |
1da177e4 | 796 | { |
a75aa90c | 797 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
798 | int status; |
799 | int i; | |
800 | ||
46b4f7c1 | 801 | dprintk("%s\n", __func__); |
1da177e4 | 802 | |
d7e43844 | 803 | /* sanity check */ |
a75aa90c | 804 | if (bytes_write > sl->link_buf_size) |
1da177e4 LT |
805 | return -EINVAL; |
806 | ||
f894165c | 807 | if (ca->pub->write_data && |
a75aa90c | 808 | (sl->slot_state != DVB_CA_SLOTSTATE_LINKINIT)) |
f894165c RM |
809 | return ca->pub->write_data(ca->pub, slot, buf, bytes_write); |
810 | ||
a1ca23d1 JJ |
811 | /* |
812 | * it is possible we are dealing with a single buffer implementation, | |
813 | * thus if there is data available for read or if there is even a read | |
814 | * already in progress, we do nothing but awake the kernel thread to | |
815 | * process the data if necessary. | |
816 | */ | |
bacba9e5 JJ |
817 | status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
818 | if (status < 0) | |
1da177e4 LT |
819 | goto exitnowrite; |
820 | if (status & (STATUSREG_DA | STATUSREG_RE)) { | |
d7e43844 MD |
821 | if (status & STATUSREG_DA) |
822 | dvb_ca_en50221_thread_wakeup(ca); | |
823 | ||
1da177e4 LT |
824 | status = -EAGAIN; |
825 | goto exitnowrite; | |
826 | } | |
827 | ||
828 | /* OK, set HC bit */ | |
bacba9e5 JJ |
829 | status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, |
830 | IRQEN | CMDREG_HC); | |
831 | if (status) | |
1da177e4 LT |
832 | goto exit; |
833 | ||
834 | /* check if interface is still free */ | |
bacba9e5 JJ |
835 | status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
836 | if (status < 0) | |
1da177e4 LT |
837 | goto exit; |
838 | if (!(status & STATUSREG_FR)) { | |
839 | /* it wasn't free => try again later */ | |
840 | status = -EAGAIN; | |
841 | goto exit; | |
842 | } | |
843 | ||
e7080d44 J |
844 | /* |
845 | * It may need some time for the CAM to settle down, or there might | |
846 | * be a race condition between the CAM, writing HC and our last | |
847 | * check for DA. This happens, if the CAM asserts DA, just after | |
848 | * checking DA before we are setting HC. In this case it might be | |
849 | * a bug in the CAM to keep the FR bit, the lower layer/HW | |
850 | * communication requires a longer timeout or the CAM needs more | |
851 | * time internally. But this happens in reality! | |
852 | * We need to read the status from the HW again and do the same | |
853 | * we did for the previous check for DA | |
854 | */ | |
855 | status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); | |
856 | if (status < 0) | |
857 | goto exit; | |
858 | ||
859 | if (status & (STATUSREG_DA | STATUSREG_RE)) { | |
860 | if (status & STATUSREG_DA) | |
861 | dvb_ca_en50221_thread_wakeup(ca); | |
862 | ||
863 | status = -EAGAIN; | |
864 | goto exit; | |
865 | } | |
866 | ||
1da177e4 | 867 | /* send the amount of data */ |
bacba9e5 JJ |
868 | status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH, |
869 | bytes_write >> 8); | |
870 | if (status) | |
1da177e4 | 871 | goto exit; |
bacba9e5 JJ |
872 | status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW, |
873 | bytes_write & 0xff); | |
874 | if (status) | |
1da177e4 LT |
875 | goto exit; |
876 | ||
877 | /* send the buffer */ | |
878 | for (i = 0; i < bytes_write; i++) { | |
bacba9e5 JJ |
879 | status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_DATA, |
880 | buf[i]); | |
881 | if (status) | |
1da177e4 LT |
882 | goto exit; |
883 | } | |
884 | ||
885 | /* check for write error (WE should now be 0) */ | |
bacba9e5 JJ |
886 | status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
887 | if (status < 0) | |
1da177e4 LT |
888 | goto exit; |
889 | if (status & STATUSREG_WE) { | |
a75aa90c | 890 | sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; |
1da177e4 LT |
891 | status = -EIO; |
892 | goto exit; | |
893 | } | |
894 | status = bytes_write; | |
895 | ||
896 | dprintk("Wrote CA packet for slot %i, connection id 0x%x last_frag:%i size:0x%x\n", slot, | |
897 | buf[0], (buf[1] & 0x80) == 0, bytes_write); | |
898 | ||
899 | exit: | |
900 | ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN); | |
901 | ||
902 | exitnowrite: | |
903 | return status; | |
904 | } | |
1da177e4 | 905 | |
96375b7a | 906 | /* ************************************************************************** */ |
1da177e4 LT |
907 | /* EN50221 higher level functions */ |
908 | ||
1da177e4 | 909 | /** |
97adc2b3 | 910 | * dvb_ca_en50221_slot_shutdown - A CAM has been removed => shut it down. |
1da177e4 | 911 | * |
fbefb1a8 MCC |
912 | * @ca: CA instance. |
913 | * @slot: Slot to shut down. | |
1da177e4 LT |
914 | */ |
915 | static int dvb_ca_en50221_slot_shutdown(struct dvb_ca_private *ca, int slot) | |
916 | { | |
46b4f7c1 | 917 | dprintk("%s\n", __func__); |
1da177e4 | 918 | |
1da177e4 LT |
919 | ca->pub->slot_shutdown(ca->pub, slot); |
920 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1da177e4 | 921 | |
a1ca23d1 JJ |
922 | /* |
923 | * need to wake up all processes to check if they're now trying to | |
924 | * write to a defunct CAM | |
925 | */ | |
1da177e4 LT |
926 | wake_up_interruptible(&ca->wait_queue); |
927 | ||
928 | dprintk("Slot %i shutdown\n", slot); | |
929 | ||
930 | /* success */ | |
931 | return 0; | |
932 | } | |
1da177e4 | 933 | |
1da177e4 | 934 | /** |
97adc2b3 | 935 | * dvb_ca_en50221_camchange_irq - A CAMCHANGE IRQ has occurred. |
1da177e4 | 936 | * |
46e42a30 | 937 | * @pubca: CA instance. |
fbefb1a8 MCC |
938 | * @slot: Slot concerned. |
939 | * @change_type: One of the DVB_CA_CAMCHANGE_* values. | |
1da177e4 | 940 | */ |
96375b7a JJ |
941 | void dvb_ca_en50221_camchange_irq(struct dvb_ca_en50221 *pubca, int slot, |
942 | int change_type) | |
1da177e4 | 943 | { |
0c53c70f | 944 | struct dvb_ca_private *ca = pubca->private; |
a75aa90c | 945 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
946 | |
947 | dprintk("CAMCHANGE IRQ slot:%i change_type:%i\n", slot, change_type); | |
948 | ||
949 | switch (change_type) { | |
950 | case DVB_CA_EN50221_CAMCHANGE_REMOVED: | |
951 | case DVB_CA_EN50221_CAMCHANGE_INSERTED: | |
952 | break; | |
953 | ||
954 | default: | |
955 | return; | |
956 | } | |
957 | ||
a75aa90c JJ |
958 | sl->camchange_type = change_type; |
959 | atomic_inc(&sl->camchange_count); | |
1da177e4 LT |
960 | dvb_ca_en50221_thread_wakeup(ca); |
961 | } | |
97adc2b3 | 962 | EXPORT_SYMBOL(dvb_ca_en50221_camchange_irq); |
1da177e4 | 963 | |
1da177e4 | 964 | /** |
fbefb1a8 | 965 | * dvb_ca_en50221_camready_irq - A CAMREADY IRQ has occurred. |
1da177e4 | 966 | * |
46e42a30 | 967 | * @pubca: CA instance. |
fbefb1a8 | 968 | * @slot: Slot concerned. |
1da177e4 LT |
969 | */ |
970 | void dvb_ca_en50221_camready_irq(struct dvb_ca_en50221 *pubca, int slot) | |
971 | { | |
0c53c70f | 972 | struct dvb_ca_private *ca = pubca->private; |
a75aa90c | 973 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
974 | |
975 | dprintk("CAMREADY IRQ slot:%i\n", slot); | |
976 | ||
a75aa90c JJ |
977 | if (sl->slot_state == DVB_CA_SLOTSTATE_WAITREADY) { |
978 | sl->slot_state = DVB_CA_SLOTSTATE_VALIDATE; | |
1da177e4 LT |
979 | dvb_ca_en50221_thread_wakeup(ca); |
980 | } | |
981 | } | |
97adc2b3 | 982 | EXPORT_SYMBOL(dvb_ca_en50221_camready_irq); |
1da177e4 | 983 | |
1da177e4 | 984 | /** |
97adc2b3 | 985 | * dvb_ca_en50221_frda_irq - An FR or DA IRQ has occurred. |
1da177e4 | 986 | * |
46e42a30 | 987 | * @pubca: CA instance. |
fbefb1a8 | 988 | * @slot: Slot concerned. |
1da177e4 LT |
989 | */ |
990 | void dvb_ca_en50221_frda_irq(struct dvb_ca_en50221 *pubca, int slot) | |
991 | { | |
0c53c70f | 992 | struct dvb_ca_private *ca = pubca->private; |
a75aa90c | 993 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
994 | int flags; |
995 | ||
996 | dprintk("FR/DA IRQ slot:%i\n", slot); | |
997 | ||
a75aa90c | 998 | switch (sl->slot_state) { |
1da177e4 LT |
999 | case DVB_CA_SLOTSTATE_LINKINIT: |
1000 | flags = ca->pub->read_cam_control(pubca, slot, CTRLIF_STATUS); | |
1001 | if (flags & STATUSREG_DA) { | |
1002 | dprintk("CAM supports DA IRQ\n"); | |
a75aa90c | 1003 | sl->da_irq_supported = 1; |
1da177e4 LT |
1004 | } |
1005 | break; | |
1006 | ||
1007 | case DVB_CA_SLOTSTATE_RUNNING: | |
1008 | if (ca->open) | |
ded92846 | 1009 | dvb_ca_en50221_thread_wakeup(ca); |
1da177e4 LT |
1010 | break; |
1011 | } | |
1012 | } | |
97adc2b3 | 1013 | EXPORT_SYMBOL(dvb_ca_en50221_frda_irq); |
1da177e4 | 1014 | |
96375b7a | 1015 | /* ************************************************************************** */ |
1da177e4 LT |
1016 | /* EN50221 thread functions */ |
1017 | ||
1018 | /** | |
1019 | * Wake up the DVB CA thread | |
1020 | * | |
fbefb1a8 | 1021 | * @ca: CA instance. |
1da177e4 LT |
1022 | */ |
1023 | static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca) | |
1024 | { | |
46b4f7c1 | 1025 | dprintk("%s\n", __func__); |
1da177e4 LT |
1026 | |
1027 | ca->wakeup = 1; | |
1028 | mb(); | |
9320874a | 1029 | wake_up_process(ca->thread); |
1da177e4 LT |
1030 | } |
1031 | ||
1da177e4 LT |
1032 | /** |
1033 | * Update the delay used by the thread. | |
1034 | * | |
fbefb1a8 | 1035 | * @ca: CA instance. |
1da177e4 LT |
1036 | */ |
1037 | static void dvb_ca_en50221_thread_update_delay(struct dvb_ca_private *ca) | |
1038 | { | |
1039 | int delay; | |
1040 | int curdelay = 100000000; | |
1041 | int slot; | |
1042 | ||
dc32f324 JJ |
1043 | /* |
1044 | * Beware of too high polling frequency, because one polling | |
71a35fe2 RS |
1045 | * call might take several hundred milliseconds until timeout! |
1046 | */ | |
1da177e4 | 1047 | for (slot = 0; slot < ca->slot_count; slot++) { |
a75aa90c JJ |
1048 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1049 | ||
1050 | switch (sl->slot_state) { | |
1da177e4 LT |
1051 | default: |
1052 | case DVB_CA_SLOTSTATE_NONE: | |
71a35fe2 RS |
1053 | delay = HZ * 60; /* 60s */ |
1054 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) | |
1055 | delay = HZ * 5; /* 5s */ | |
1056 | break; | |
1da177e4 | 1057 | case DVB_CA_SLOTSTATE_INVALID: |
71a35fe2 RS |
1058 | delay = HZ * 60; /* 60s */ |
1059 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) | |
1060 | delay = HZ / 10; /* 100ms */ | |
1da177e4 LT |
1061 | break; |
1062 | ||
1063 | case DVB_CA_SLOTSTATE_UNINITIALISED: | |
1064 | case DVB_CA_SLOTSTATE_WAITREADY: | |
1065 | case DVB_CA_SLOTSTATE_VALIDATE: | |
1066 | case DVB_CA_SLOTSTATE_WAITFR: | |
1067 | case DVB_CA_SLOTSTATE_LINKINIT: | |
71a35fe2 | 1068 | delay = HZ / 10; /* 100ms */ |
1da177e4 LT |
1069 | break; |
1070 | ||
1071 | case DVB_CA_SLOTSTATE_RUNNING: | |
71a35fe2 RS |
1072 | delay = HZ * 60; /* 60s */ |
1073 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) | |
1074 | delay = HZ / 10; /* 100ms */ | |
1da177e4 | 1075 | if (ca->open) { |
a75aa90c | 1076 | if ((!sl->da_irq_supported) || |
71a35fe2 RS |
1077 | (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_DA))) |
1078 | delay = HZ / 10; /* 100ms */ | |
1da177e4 LT |
1079 | } |
1080 | break; | |
1081 | } | |
1082 | ||
1083 | if (delay < curdelay) | |
1084 | curdelay = delay; | |
1085 | } | |
1086 | ||
1087 | ca->delay = curdelay; | |
1088 | } | |
1089 | ||
5d023252 JJ |
1090 | /** |
1091 | * Poll if the CAM is gone. | |
1092 | * | |
1093 | * @ca: CA instance. | |
1094 | * @slot: Slot to process. | |
46e42a30 | 1095 | * return:: 0 .. no change |
5d023252 JJ |
1096 | * 1 .. CAM state changed |
1097 | */ | |
1098 | ||
1099 | static int dvb_ca_en50221_poll_cam_gone(struct dvb_ca_private *ca, int slot) | |
1100 | { | |
1101 | int changed = 0; | |
1102 | int status; | |
1103 | ||
1104 | /* | |
1105 | * we need this extra check for annoying interfaces like the | |
1106 | * budget-av | |
1107 | */ | |
1108 | if ((!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) && | |
1109 | (ca->pub->poll_slot_status)) { | |
1110 | status = ca->pub->poll_slot_status(ca->pub, slot, 0); | |
1111 | if (!(status & | |
1112 | DVB_CA_EN50221_POLL_CAM_PRESENT)) { | |
1113 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1114 | dvb_ca_en50221_thread_update_delay(ca); | |
1115 | changed = 1; | |
1116 | } | |
1117 | } | |
1118 | return changed; | |
1119 | } | |
1120 | ||
1da177e4 | 1121 | /** |
a004b70e JJ |
1122 | * Thread state machine for one CA slot to perform the data transfer. |
1123 | * | |
1124 | * @ca: CA instance. | |
1125 | * @slot: Slot to process. | |
1da177e4 | 1126 | */ |
a004b70e JJ |
1127 | static void dvb_ca_en50221_thread_state_machine(struct dvb_ca_private *ca, |
1128 | int slot) | |
1da177e4 | 1129 | { |
a004b70e | 1130 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 | 1131 | int flags; |
1da177e4 LT |
1132 | int pktcount; |
1133 | void *rxbuf; | |
1134 | ||
a004b70e | 1135 | mutex_lock(&sl->slot_lock); |
1da177e4 | 1136 | |
a004b70e JJ |
1137 | /* check the cam status + deal with CAMCHANGEs */ |
1138 | while (dvb_ca_en50221_check_camstatus(ca, slot)) { | |
1139 | /* clear down an old CI slot if necessary */ | |
1140 | if (sl->slot_state != DVB_CA_SLOTSTATE_NONE) | |
1141 | dvb_ca_en50221_slot_shutdown(ca, slot); | |
1da177e4 | 1142 | |
a004b70e JJ |
1143 | /* if a CAM is NOW present, initialise it */ |
1144 | if (sl->camchange_type == DVB_CA_EN50221_CAMCHANGE_INSERTED) | |
1145 | sl->slot_state = DVB_CA_SLOTSTATE_UNINITIALISED; | |
1da177e4 | 1146 | |
a004b70e JJ |
1147 | /* we've handled one CAMCHANGE */ |
1148 | dvb_ca_en50221_thread_update_delay(ca); | |
1149 | atomic_dec(&sl->camchange_count); | |
1150 | } | |
1da177e4 | 1151 | |
a004b70e JJ |
1152 | /* CAM state machine */ |
1153 | switch (sl->slot_state) { | |
1154 | case DVB_CA_SLOTSTATE_NONE: | |
1155 | case DVB_CA_SLOTSTATE_INVALID: | |
1156 | /* no action needed */ | |
1157 | break; | |
1da177e4 | 1158 | |
a004b70e JJ |
1159 | case DVB_CA_SLOTSTATE_UNINITIALISED: |
1160 | sl->slot_state = DVB_CA_SLOTSTATE_WAITREADY; | |
1161 | ca->pub->slot_reset(ca->pub, slot); | |
1162 | sl->timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); | |
1163 | break; | |
1da177e4 | 1164 | |
a004b70e JJ |
1165 | case DVB_CA_SLOTSTATE_WAITREADY: |
1166 | if (time_after(jiffies, sl->timeout)) { | |
1167 | pr_err("dvb_ca adaptor %d: PC card did not respond :(\n", | |
1168 | ca->dvbdev->adapter->num); | |
1169 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1170 | dvb_ca_en50221_thread_update_delay(ca); | |
1171 | break; | |
1172 | } | |
1173 | /* | |
1174 | * no other action needed; will automatically change state when | |
1175 | * ready | |
1176 | */ | |
1177 | break; | |
1da177e4 | 1178 | |
a004b70e JJ |
1179 | case DVB_CA_SLOTSTATE_VALIDATE: |
1180 | if (dvb_ca_en50221_parse_attributes(ca, slot) != 0) { | |
5d023252 JJ |
1181 | if (dvb_ca_en50221_poll_cam_gone(ca, slot)) |
1182 | break; | |
1da177e4 | 1183 | |
a004b70e JJ |
1184 | pr_err("dvb_ca adapter %d: Invalid PC card inserted :(\n", |
1185 | ca->dvbdev->adapter->num); | |
1186 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1187 | dvb_ca_en50221_thread_update_delay(ca); | |
1188 | break; | |
1189 | } | |
1190 | if (dvb_ca_en50221_set_configoption(ca, slot) != 0) { | |
1191 | pr_err("dvb_ca adapter %d: Unable to initialise CAM :(\n", | |
1192 | ca->dvbdev->adapter->num); | |
1193 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1194 | dvb_ca_en50221_thread_update_delay(ca); | |
1195 | break; | |
1196 | } | |
1197 | if (ca->pub->write_cam_control(ca->pub, slot, | |
1198 | CTRLIF_COMMAND, | |
1199 | CMDREG_RS) != 0) { | |
1200 | pr_err("dvb_ca adapter %d: Unable to reset CAM IF\n", | |
1201 | ca->dvbdev->adapter->num); | |
1202 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1203 | dvb_ca_en50221_thread_update_delay(ca); | |
1204 | break; | |
1205 | } | |
1206 | dprintk("DVB CAM validated successfully\n"); | |
1da177e4 | 1207 | |
a004b70e JJ |
1208 | sl->timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); |
1209 | sl->slot_state = DVB_CA_SLOTSTATE_WAITFR; | |
1210 | ca->wakeup = 1; | |
1211 | break; | |
1da177e4 | 1212 | |
a004b70e JJ |
1213 | case DVB_CA_SLOTSTATE_WAITFR: |
1214 | if (time_after(jiffies, sl->timeout)) { | |
1215 | pr_err("dvb_ca adapter %d: DVB CAM did not respond :(\n", | |
1216 | ca->dvbdev->adapter->num); | |
1217 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1218 | dvb_ca_en50221_thread_update_delay(ca); | |
1219 | break; | |
1220 | } | |
1da177e4 | 1221 | |
a004b70e JJ |
1222 | flags = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
1223 | if (flags & STATUSREG_FR) { | |
1224 | sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
1225 | ca->wakeup = 1; | |
1226 | } | |
1227 | break; | |
1da177e4 | 1228 | |
a004b70e JJ |
1229 | case DVB_CA_SLOTSTATE_LINKINIT: |
1230 | if (dvb_ca_en50221_link_init(ca, slot) != 0) { | |
5d023252 JJ |
1231 | if (dvb_ca_en50221_poll_cam_gone(ca, slot)) |
1232 | break; | |
1da177e4 | 1233 | |
a004b70e JJ |
1234 | pr_err("dvb_ca adapter %d: DVB CAM link initialisation failed :(\n", |
1235 | ca->dvbdev->adapter->num); | |
1236 | sl->slot_state = DVB_CA_SLOTSTATE_UNINITIALISED; | |
1237 | dvb_ca_en50221_thread_update_delay(ca); | |
1238 | break; | |
1239 | } | |
1da177e4 | 1240 | |
a004b70e JJ |
1241 | if (!sl->rx_buffer.data) { |
1242 | rxbuf = vmalloc(RX_BUFFER_SIZE); | |
1243 | if (!rxbuf) { | |
1244 | pr_err("dvb_ca adapter %d: Unable to allocate CAM rx buffer :(\n", | |
b3ad24d2 | 1245 | ca->dvbdev->adapter->num); |
a004b70e JJ |
1246 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; |
1247 | dvb_ca_en50221_thread_update_delay(ca); | |
1da177e4 | 1248 | break; |
a004b70e JJ |
1249 | } |
1250 | dvb_ringbuffer_init(&sl->rx_buffer, rxbuf, | |
1251 | RX_BUFFER_SIZE); | |
1252 | } | |
1da177e4 | 1253 | |
a004b70e JJ |
1254 | ca->pub->slot_ts_enable(ca->pub, slot); |
1255 | sl->slot_state = DVB_CA_SLOTSTATE_RUNNING; | |
1256 | dvb_ca_en50221_thread_update_delay(ca); | |
1257 | pr_err("dvb_ca adapter %d: DVB CAM detected and initialised successfully\n", | |
1258 | ca->dvbdev->adapter->num); | |
1259 | break; | |
1da177e4 | 1260 | |
a004b70e JJ |
1261 | case DVB_CA_SLOTSTATE_RUNNING: |
1262 | if (!ca->open) | |
1263 | break; | |
1264 | ||
1265 | /* poll slots for data */ | |
1266 | pktcount = 0; | |
1267 | while (dvb_ca_en50221_read_data(ca, slot, NULL, 0) > 0) { | |
1268 | if (!ca->open) | |
1269 | break; | |
1270 | ||
1271 | /* | |
1272 | * if a CAMCHANGE occurred at some point, do not do any | |
1273 | * more processing of this slot | |
1274 | */ | |
1275 | if (dvb_ca_en50221_check_camstatus(ca, slot)) { | |
1276 | /* | |
4ecb4bfc | 1277 | * we don't want to sleep on the next iteration |
a004b70e JJ |
1278 | * so we can handle the cam change |
1279 | */ | |
1280 | ca->wakeup = 1; | |
1da177e4 LT |
1281 | break; |
1282 | } | |
d7e43844 | 1283 | |
a004b70e JJ |
1284 | /* check if we've hit our limit this time */ |
1285 | if (++pktcount >= MAX_RX_PACKETS_PER_ITERATION) { | |
1286 | /* | |
4ecb4bfc | 1287 | * don't sleep; there is likely to be more data |
a004b70e JJ |
1288 | * to read |
1289 | */ | |
1290 | ca->wakeup = 1; | |
1291 | break; | |
1292 | } | |
1da177e4 | 1293 | } |
a004b70e JJ |
1294 | break; |
1295 | } | |
1296 | ||
1297 | mutex_unlock(&sl->slot_lock); | |
1298 | } | |
1299 | ||
46e42a30 | 1300 | /* |
a004b70e JJ |
1301 | * Kernel thread which monitors CA slots for CAM changes, and performs data |
1302 | * transfers. | |
1303 | */ | |
1304 | static int dvb_ca_en50221_thread(void *data) | |
1305 | { | |
1306 | struct dvb_ca_private *ca = data; | |
1307 | int slot; | |
1308 | ||
1309 | dprintk("%s\n", __func__); | |
1310 | ||
1311 | /* choose the correct initial delay */ | |
1312 | dvb_ca_en50221_thread_update_delay(ca); | |
1313 | ||
1314 | /* main loop */ | |
1315 | while (!kthread_should_stop()) { | |
1316 | /* sleep for a bit */ | |
1317 | if (!ca->wakeup) { | |
1318 | set_current_state(TASK_INTERRUPTIBLE); | |
1319 | schedule_timeout(ca->delay); | |
1320 | if (kthread_should_stop()) | |
1321 | return 0; | |
1322 | } | |
1323 | ca->wakeup = 0; | |
1324 | ||
1325 | /* go through all the slots processing them */ | |
1326 | for (slot = 0; slot < ca->slot_count; slot++) | |
1327 | dvb_ca_en50221_thread_state_machine(ca, slot); | |
1da177e4 LT |
1328 | } |
1329 | ||
1da177e4 LT |
1330 | return 0; |
1331 | } | |
1332 | ||
96375b7a | 1333 | /* ************************************************************************** */ |
1da177e4 LT |
1334 | /* EN50221 IO interface functions */ |
1335 | ||
1336 | /** | |
1337 | * Real ioctl implementation. | |
1338 | * NOTE: CA_SEND_MSG/CA_GET_MSG ioctls have userspace buffers passed to them. | |
1339 | * | |
fbefb1a8 MCC |
1340 | * @file: File concerned. |
1341 | * @cmd: IOCTL command. | |
46e42a30 | 1342 | * @parg: Associated argument. |
1da177e4 | 1343 | * |
46e42a30 | 1344 | * return: 0 on success, <0 on error. |
1da177e4 | 1345 | */ |
16ef8def | 1346 | static int dvb_ca_en50221_io_do_ioctl(struct file *file, |
1da177e4 LT |
1347 | unsigned int cmd, void *parg) |
1348 | { | |
0c53c70f JS |
1349 | struct dvb_device *dvbdev = file->private_data; |
1350 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1351 | int err = 0; |
1352 | int slot; | |
1353 | ||
46b4f7c1 | 1354 | dprintk("%s\n", __func__); |
1da177e4 | 1355 | |
30ad64b8 NS |
1356 | if (mutex_lock_interruptible(&ca->ioctl_mutex)) |
1357 | return -ERESTARTSYS; | |
1358 | ||
1da177e4 LT |
1359 | switch (cmd) { |
1360 | case CA_RESET: | |
1361 | for (slot = 0; slot < ca->slot_count; slot++) { | |
a75aa90c JJ |
1362 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1363 | ||
1364 | mutex_lock(&sl->slot_lock); | |
1365 | if (sl->slot_state != DVB_CA_SLOTSTATE_NONE) { | |
1da177e4 LT |
1366 | dvb_ca_en50221_slot_shutdown(ca, slot); |
1367 | if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE) | |
1368 | dvb_ca_en50221_camchange_irq(ca->pub, | |
1369 | slot, | |
1370 | DVB_CA_EN50221_CAMCHANGE_INSERTED); | |
1371 | } | |
a75aa90c | 1372 | mutex_unlock(&sl->slot_lock); |
1da177e4 LT |
1373 | } |
1374 | ca->next_read_slot = 0; | |
1375 | dvb_ca_en50221_thread_wakeup(ca); | |
1376 | break; | |
1377 | ||
1378 | case CA_GET_CAP: { | |
0c53c70f | 1379 | struct ca_caps *caps = parg; |
1da177e4 LT |
1380 | |
1381 | caps->slot_num = ca->slot_count; | |
1382 | caps->slot_type = CA_CI_LINK; | |
1383 | caps->descr_num = 0; | |
1384 | caps->descr_type = 0; | |
1385 | break; | |
1386 | } | |
1387 | ||
1388 | case CA_GET_SLOT_INFO: { | |
0c53c70f | 1389 | struct ca_slot_info *info = parg; |
a75aa90c | 1390 | struct dvb_ca_slot *sl; |
1da177e4 | 1391 | |
a75aa90c JJ |
1392 | slot = info->num; |
1393 | if ((slot > ca->slot_count) || (slot < 0)) { | |
c4fe29a3 DC |
1394 | err = -EINVAL; |
1395 | goto out_unlock; | |
1396 | } | |
1da177e4 LT |
1397 | |
1398 | info->type = CA_CI_LINK; | |
1399 | info->flags = 0; | |
a75aa90c JJ |
1400 | sl = &ca->slot_info[slot]; |
1401 | if ((sl->slot_state != DVB_CA_SLOTSTATE_NONE) && | |
1402 | (sl->slot_state != DVB_CA_SLOTSTATE_INVALID)) { | |
1da177e4 LT |
1403 | info->flags = CA_CI_MODULE_PRESENT; |
1404 | } | |
a75aa90c | 1405 | if (sl->slot_state == DVB_CA_SLOTSTATE_RUNNING) |
1da177e4 | 1406 | info->flags |= CA_CI_MODULE_READY; |
1da177e4 LT |
1407 | break; |
1408 | } | |
1409 | ||
1410 | default: | |
1411 | err = -EINVAL; | |
1412 | break; | |
1413 | } | |
1414 | ||
c4fe29a3 | 1415 | out_unlock: |
30ad64b8 | 1416 | mutex_unlock(&ca->ioctl_mutex); |
1da177e4 LT |
1417 | return err; |
1418 | } | |
1419 | ||
1da177e4 LT |
1420 | /** |
1421 | * Wrapper for ioctl implementation. | |
1422 | * | |
fbefb1a8 MCC |
1423 | * @file: File concerned. |
1424 | * @cmd: IOCTL command. | |
1425 | * @arg: Associated argument. | |
1da177e4 | 1426 | * |
46e42a30 | 1427 | * return: 0 on success, <0 on error. |
1da177e4 | 1428 | */ |
16ef8def AB |
1429 | static long dvb_ca_en50221_io_ioctl(struct file *file, |
1430 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1431 | { |
72024f1e | 1432 | return dvb_usercopy(file, cmd, arg, dvb_ca_en50221_io_do_ioctl); |
1da177e4 LT |
1433 | } |
1434 | ||
1da177e4 LT |
1435 | /** |
1436 | * Implementation of write() syscall. | |
1437 | * | |
fbefb1a8 MCC |
1438 | * @file: File structure. |
1439 | * @buf: Source buffer. | |
1440 | * @count: Size of source buffer. | |
1441 | * @ppos: Position in file (ignored). | |
1da177e4 | 1442 | * |
46e42a30 | 1443 | * return: Number of bytes read, or <0 on error. |
1da177e4 LT |
1444 | */ |
1445 | static ssize_t dvb_ca_en50221_io_write(struct file *file, | |
8ec6107a JJ |
1446 | const char __user *buf, size_t count, |
1447 | loff_t *ppos) | |
1da177e4 | 1448 | { |
0c53c70f JS |
1449 | struct dvb_device *dvbdev = file->private_data; |
1450 | struct dvb_ca_private *ca = dvbdev->priv; | |
a75aa90c | 1451 | struct dvb_ca_slot *sl; |
1da177e4 LT |
1452 | u8 slot, connection_id; |
1453 | int status; | |
260f8d7c | 1454 | u8 fragbuf[HOST_LINK_BUF_SIZE]; |
1da177e4 LT |
1455 | int fragpos = 0; |
1456 | int fraglen; | |
1457 | unsigned long timeout; | |
1458 | int written; | |
1459 | ||
46b4f7c1 | 1460 | dprintk("%s\n", __func__); |
1da177e4 | 1461 | |
96375b7a JJ |
1462 | /* |
1463 | * Incoming packet has a 2 byte header. | |
1464 | * hdr[0] = slot_id, hdr[1] = connection_id | |
1465 | */ | |
1da177e4 LT |
1466 | if (count < 2) |
1467 | return -EINVAL; | |
1468 | ||
1469 | /* extract slot & connection id */ | |
1470 | if (copy_from_user(&slot, buf, 1)) | |
1471 | return -EFAULT; | |
1472 | if (copy_from_user(&connection_id, buf + 1, 1)) | |
1473 | return -EFAULT; | |
1474 | buf += 2; | |
1475 | count -= 2; | |
a24e6348 CIK |
1476 | |
1477 | if (slot >= ca->slot_count) | |
1478 | return -EINVAL; | |
a75aa90c | 1479 | sl = &ca->slot_info[slot]; |
1da177e4 LT |
1480 | |
1481 | /* check if the slot is actually running */ | |
a75aa90c | 1482 | if (sl->slot_state != DVB_CA_SLOTSTATE_RUNNING) |
1da177e4 LT |
1483 | return -EINVAL; |
1484 | ||
1485 | /* fragment the packets & store in the buffer */ | |
1486 | while (fragpos < count) { | |
a75aa90c | 1487 | fraglen = sl->link_buf_size - 2; |
624f0c18 MCC |
1488 | if (fraglen < 0) |
1489 | break; | |
1490 | if (fraglen > HOST_LINK_BUF_SIZE - 2) | |
1491 | fraglen = HOST_LINK_BUF_SIZE - 2; | |
1da177e4 LT |
1492 | if ((count - fragpos) < fraglen) |
1493 | fraglen = count - fragpos; | |
1494 | ||
1495 | fragbuf[0] = connection_id; | |
1496 | fragbuf[1] = ((fragpos + fraglen) < count) ? 0x80 : 0x00; | |
e252984c DC |
1497 | status = copy_from_user(fragbuf + 2, buf + fragpos, fraglen); |
1498 | if (status) { | |
1499 | status = -EFAULT; | |
1da177e4 | 1500 | goto exit; |
e252984c | 1501 | } |
1da177e4 LT |
1502 | |
1503 | timeout = jiffies + HZ / 2; | |
1504 | written = 0; | |
1505 | while (!time_after(jiffies, timeout)) { | |
96375b7a JJ |
1506 | /* |
1507 | * check the CAM hasn't been removed/reset in the | |
1508 | * meantime | |
1509 | */ | |
a75aa90c | 1510 | if (sl->slot_state != DVB_CA_SLOTSTATE_RUNNING) { |
1da177e4 LT |
1511 | status = -EIO; |
1512 | goto exit; | |
1513 | } | |
1514 | ||
a75aa90c | 1515 | mutex_lock(&sl->slot_lock); |
96375b7a JJ |
1516 | status = dvb_ca_en50221_write_data(ca, slot, fragbuf, |
1517 | fraglen + 2); | |
a75aa90c | 1518 | mutex_unlock(&sl->slot_lock); |
1da177e4 LT |
1519 | if (status == (fraglen + 2)) { |
1520 | written = 1; | |
1521 | break; | |
1522 | } | |
1523 | if (status != -EAGAIN) | |
1524 | goto exit; | |
1525 | ||
b9af29e1 | 1526 | usleep_range(1000, 1100); |
1da177e4 LT |
1527 | } |
1528 | if (!written) { | |
1529 | status = -EIO; | |
1530 | goto exit; | |
1531 | } | |
1532 | ||
1533 | fragpos += fraglen; | |
1534 | } | |
1535 | status = count + 2; | |
1536 | ||
1537 | exit: | |
1538 | return status; | |
1539 | } | |
1540 | ||
46e42a30 | 1541 | /* |
1da177e4 LT |
1542 | * Condition for waking up in dvb_ca_en50221_io_read_condition |
1543 | */ | |
ded92846 AQ |
1544 | static int dvb_ca_en50221_io_read_condition(struct dvb_ca_private *ca, |
1545 | int *result, int *_slot) | |
1da177e4 LT |
1546 | { |
1547 | int slot; | |
1548 | int slot_count = 0; | |
1549 | int idx; | |
ded92846 | 1550 | size_t fraglen; |
1da177e4 LT |
1551 | int connection_id = -1; |
1552 | int found = 0; | |
1553 | u8 hdr[2]; | |
1554 | ||
1555 | slot = ca->next_read_slot; | |
1556 | while ((slot_count < ca->slot_count) && (!found)) { | |
a75aa90c JJ |
1557 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1558 | ||
1559 | if (sl->slot_state != DVB_CA_SLOTSTATE_RUNNING) | |
1da177e4 LT |
1560 | goto nextslot; |
1561 | ||
a75aa90c | 1562 | if (!sl->rx_buffer.data) |
1da177e4 | 1563 | return 0; |
1da177e4 | 1564 | |
a75aa90c | 1565 | idx = dvb_ringbuffer_pkt_next(&sl->rx_buffer, -1, &fraglen); |
1da177e4 | 1566 | while (idx != -1) { |
a75aa90c | 1567 | dvb_ringbuffer_pkt_read(&sl->rx_buffer, idx, 0, hdr, 2); |
1da177e4 LT |
1568 | if (connection_id == -1) |
1569 | connection_id = hdr[0]; | |
96375b7a JJ |
1570 | if ((hdr[0] == connection_id) && |
1571 | ((hdr[1] & 0x80) == 0)) { | |
1da177e4 LT |
1572 | *_slot = slot; |
1573 | found = 1; | |
1574 | break; | |
1575 | } | |
1576 | ||
a75aa90c JJ |
1577 | idx = dvb_ringbuffer_pkt_next(&sl->rx_buffer, idx, |
1578 | &fraglen); | |
1da177e4 LT |
1579 | } |
1580 | ||
ded92846 | 1581 | nextslot: |
1da177e4 LT |
1582 | slot = (slot + 1) % ca->slot_count; |
1583 | slot_count++; | |
1584 | } | |
1585 | ||
1586 | ca->next_read_slot = slot; | |
1587 | return found; | |
1588 | } | |
1589 | ||
1da177e4 LT |
1590 | /** |
1591 | * Implementation of read() syscall. | |
1592 | * | |
fbefb1a8 MCC |
1593 | * @file: File structure. |
1594 | * @buf: Destination buffer. | |
1595 | * @count: Size of destination buffer. | |
1596 | * @ppos: Position in file (ignored). | |
1da177e4 | 1597 | * |
46e42a30 | 1598 | * return: Number of bytes read, or <0 on error. |
1da177e4 | 1599 | */ |
8ec6107a JJ |
1600 | static ssize_t dvb_ca_en50221_io_read(struct file *file, char __user *buf, |
1601 | size_t count, loff_t *ppos) | |
1da177e4 | 1602 | { |
0c53c70f JS |
1603 | struct dvb_device *dvbdev = file->private_data; |
1604 | struct dvb_ca_private *ca = dvbdev->priv; | |
a75aa90c | 1605 | struct dvb_ca_slot *sl; |
1da177e4 LT |
1606 | int status; |
1607 | int result = 0; | |
1608 | u8 hdr[2]; | |
1609 | int slot; | |
1610 | int connection_id = -1; | |
1611 | size_t idx, idx2; | |
1612 | int last_fragment = 0; | |
1613 | size_t fraglen; | |
1614 | int pktlen; | |
1615 | int dispose = 0; | |
1616 | ||
46b4f7c1 | 1617 | dprintk("%s\n", __func__); |
1da177e4 | 1618 | |
96375b7a JJ |
1619 | /* |
1620 | * Outgoing packet has a 2 byte header. | |
1621 | * hdr[0] = slot_id, hdr[1] = connection_id | |
1622 | */ | |
1da177e4 LT |
1623 | if (count < 2) |
1624 | return -EINVAL; | |
1625 | ||
1626 | /* wait for some data */ | |
bacba9e5 JJ |
1627 | status = dvb_ca_en50221_io_read_condition(ca, &result, &slot); |
1628 | if (status == 0) { | |
1da177e4 LT |
1629 | /* if we're in nonblocking mode, exit immediately */ |
1630 | if (file->f_flags & O_NONBLOCK) | |
1631 | return -EWOULDBLOCK; | |
1632 | ||
1633 | /* wait for some data */ | |
1634 | status = wait_event_interruptible(ca->wait_queue, | |
1635 | dvb_ca_en50221_io_read_condition | |
1636 | (ca, &result, &slot)); | |
1637 | } | |
1638 | if ((status < 0) || (result < 0)) { | |
1639 | if (result) | |
1640 | return result; | |
1641 | return status; | |
1642 | } | |
1643 | ||
a75aa90c JJ |
1644 | sl = &ca->slot_info[slot]; |
1645 | idx = dvb_ringbuffer_pkt_next(&sl->rx_buffer, -1, &fraglen); | |
1da177e4 LT |
1646 | pktlen = 2; |
1647 | do { | |
1648 | if (idx == -1) { | |
b3ad24d2 MCC |
1649 | pr_err("dvb_ca adapter %d: BUG: read packet ended before last_fragment encountered\n", |
1650 | ca->dvbdev->adapter->num); | |
1da177e4 LT |
1651 | status = -EIO; |
1652 | goto exit; | |
1653 | } | |
1654 | ||
a75aa90c | 1655 | dvb_ringbuffer_pkt_read(&sl->rx_buffer, idx, 0, hdr, 2); |
1da177e4 LT |
1656 | if (connection_id == -1) |
1657 | connection_id = hdr[0]; | |
1658 | if (hdr[0] == connection_id) { | |
1659 | if (pktlen < count) { | |
7bd8cc8f | 1660 | if ((pktlen + fraglen - 2) > count) |
1da177e4 | 1661 | fraglen = count - pktlen; |
7bd8cc8f | 1662 | else |
1da177e4 | 1663 | fraglen -= 2; |
1da177e4 | 1664 | |
a75aa90c JJ |
1665 | status = |
1666 | dvb_ringbuffer_pkt_read_user(&sl->rx_buffer, | |
1667 | idx, 2, | |
1668 | buf + pktlen, | |
1669 | fraglen); | |
1670 | if (status < 0) | |
1da177e4 | 1671 | goto exit; |
a75aa90c | 1672 | |
1da177e4 LT |
1673 | pktlen += fraglen; |
1674 | } | |
1675 | ||
1676 | if ((hdr[1] & 0x80) == 0) | |
1677 | last_fragment = 1; | |
1678 | dispose = 1; | |
1679 | } | |
1680 | ||
a75aa90c | 1681 | idx2 = dvb_ringbuffer_pkt_next(&sl->rx_buffer, idx, &fraglen); |
1da177e4 | 1682 | if (dispose) |
a75aa90c | 1683 | dvb_ringbuffer_pkt_dispose(&sl->rx_buffer, idx); |
1da177e4 LT |
1684 | idx = idx2; |
1685 | dispose = 0; | |
1686 | } while (!last_fragment); | |
1687 | ||
1688 | hdr[0] = slot; | |
1689 | hdr[1] = connection_id; | |
e252984c DC |
1690 | status = copy_to_user(buf, hdr, 2); |
1691 | if (status) { | |
1692 | status = -EFAULT; | |
1da177e4 | 1693 | goto exit; |
e252984c | 1694 | } |
1da177e4 LT |
1695 | status = pktlen; |
1696 | ||
ded92846 | 1697 | exit: |
1da177e4 LT |
1698 | return status; |
1699 | } | |
1700 | ||
1da177e4 LT |
1701 | /** |
1702 | * Implementation of file open syscall. | |
1703 | * | |
fbefb1a8 MCC |
1704 | * @inode: Inode concerned. |
1705 | * @file: File concerned. | |
1da177e4 | 1706 | * |
46e42a30 | 1707 | * return: 0 on success, <0 on failure. |
1da177e4 LT |
1708 | */ |
1709 | static int dvb_ca_en50221_io_open(struct inode *inode, struct file *file) | |
1710 | { | |
0c53c70f JS |
1711 | struct dvb_device *dvbdev = file->private_data; |
1712 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1713 | int err; |
1714 | int i; | |
1715 | ||
46b4f7c1 | 1716 | dprintk("%s\n", __func__); |
1da177e4 LT |
1717 | |
1718 | if (!try_module_get(ca->pub->owner)) | |
1719 | return -EIO; | |
1720 | ||
1721 | err = dvb_generic_open(inode, file); | |
226835d7 MS |
1722 | if (err < 0) { |
1723 | module_put(ca->pub->owner); | |
1da177e4 | 1724 | return err; |
226835d7 | 1725 | } |
1da177e4 LT |
1726 | |
1727 | for (i = 0; i < ca->slot_count; i++) { | |
a75aa90c | 1728 | struct dvb_ca_slot *sl = &ca->slot_info[i]; |
1da177e4 | 1729 | |
a75aa90c JJ |
1730 | if (sl->slot_state == DVB_CA_SLOTSTATE_RUNNING) { |
1731 | if (!sl->rx_buffer.data) { | |
a1ca23d1 JJ |
1732 | /* |
1733 | * it is safe to call this here without locks | |
1734 | * because ca->open == 0. Data is not read in | |
1735 | * this case | |
1736 | */ | |
a75aa90c | 1737 | dvb_ringbuffer_flush(&sl->rx_buffer); |
1da177e4 | 1738 | } |
1da177e4 LT |
1739 | } |
1740 | } | |
1741 | ||
1742 | ca->open = 1; | |
1743 | dvb_ca_en50221_thread_update_delay(ca); | |
1744 | dvb_ca_en50221_thread_wakeup(ca); | |
1745 | ||
da677fe1 MK |
1746 | dvb_ca_private_get(ca); |
1747 | ||
1da177e4 LT |
1748 | return 0; |
1749 | } | |
1750 | ||
1da177e4 LT |
1751 | /** |
1752 | * Implementation of file close syscall. | |
1753 | * | |
fbefb1a8 MCC |
1754 | * @inode: Inode concerned. |
1755 | * @file: File concerned. | |
1da177e4 | 1756 | * |
46e42a30 | 1757 | * return: 0 on success, <0 on failure. |
1da177e4 LT |
1758 | */ |
1759 | static int dvb_ca_en50221_io_release(struct inode *inode, struct file *file) | |
1760 | { | |
0c53c70f JS |
1761 | struct dvb_device *dvbdev = file->private_data; |
1762 | struct dvb_ca_private *ca = dvbdev->priv; | |
0c12c1bf | 1763 | int err; |
1da177e4 | 1764 | |
46b4f7c1 | 1765 | dprintk("%s\n", __func__); |
1da177e4 LT |
1766 | |
1767 | /* mark the CA device as closed */ | |
1768 | ca->open = 0; | |
1769 | dvb_ca_en50221_thread_update_delay(ca); | |
1770 | ||
1771 | err = dvb_generic_release(inode, file); | |
1772 | ||
1773 | module_put(ca->pub->owner); | |
1774 | ||
da677fe1 MK |
1775 | dvb_ca_private_put(ca); |
1776 | ||
0c12c1bf | 1777 | return err; |
1da177e4 LT |
1778 | } |
1779 | ||
1da177e4 LT |
1780 | /** |
1781 | * Implementation of poll() syscall. | |
1782 | * | |
fbefb1a8 MCC |
1783 | * @file: File concerned. |
1784 | * @wait: poll wait table. | |
1da177e4 | 1785 | * |
46e42a30 | 1786 | * return: Standard poll mask. |
1da177e4 | 1787 | */ |
c23e0cb8 | 1788 | static __poll_t dvb_ca_en50221_io_poll(struct file *file, poll_table *wait) |
1da177e4 | 1789 | { |
0c53c70f JS |
1790 | struct dvb_device *dvbdev = file->private_data; |
1791 | struct dvb_ca_private *ca = dvbdev->priv; | |
c23e0cb8 | 1792 | __poll_t mask = 0; |
1da177e4 LT |
1793 | int slot; |
1794 | int result = 0; | |
1795 | ||
46b4f7c1 | 1796 | dprintk("%s\n", __func__); |
1da177e4 | 1797 | |
7bd8cc8f | 1798 | if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) |
a9a08845 | 1799 | mask |= EPOLLIN; |
1da177e4 LT |
1800 | |
1801 | /* if there is something, return now */ | |
1802 | if (mask) | |
1803 | return mask; | |
1804 | ||
1805 | /* wait for something to happen */ | |
1806 | poll_wait(file, &ca->wait_queue, wait); | |
1807 | ||
7bd8cc8f | 1808 | if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) |
a9a08845 | 1809 | mask |= EPOLLIN; |
1da177e4 LT |
1810 | |
1811 | return mask; | |
1812 | } | |
1da177e4 | 1813 | |
784e29d2 | 1814 | static const struct file_operations dvb_ca_fops = { |
1da177e4 LT |
1815 | .owner = THIS_MODULE, |
1816 | .read = dvb_ca_en50221_io_read, | |
1817 | .write = dvb_ca_en50221_io_write, | |
16ef8def | 1818 | .unlocked_ioctl = dvb_ca_en50221_io_ioctl, |
1da177e4 LT |
1819 | .open = dvb_ca_en50221_io_open, |
1820 | .release = dvb_ca_en50221_io_release, | |
1821 | .poll = dvb_ca_en50221_io_poll, | |
6038f373 | 1822 | .llseek = noop_llseek, |
1da177e4 LT |
1823 | }; |
1824 | ||
738a1b1e | 1825 | static const struct dvb_device dvbdev_ca = { |
1da177e4 LT |
1826 | .priv = NULL, |
1827 | .users = 1, | |
1828 | .readers = 1, | |
1829 | .writers = 1, | |
738a1b1e | 1830 | #if defined(CONFIG_MEDIA_CONTROLLER_DVB) |
e4fd3bc5 | 1831 | .name = "dvb-ca-en50221", |
738a1b1e | 1832 | #endif |
1da177e4 LT |
1833 | .fops = &dvb_ca_fops, |
1834 | }; | |
1835 | ||
96375b7a | 1836 | /* ************************************************************************** */ |
1da177e4 LT |
1837 | /* Initialisation/shutdown functions */ |
1838 | ||
1da177e4 LT |
1839 | /** |
1840 | * Initialise a new DVB CA EN50221 interface device. | |
1841 | * | |
fbefb1a8 | 1842 | * @dvb_adapter: DVB adapter to attach the new CA device to. |
46e42a30 | 1843 | * @pubca: The dvb_ca instance. |
fbefb1a8 MCC |
1844 | * @flags: Flags describing the CA device (DVB_CA_FLAG_*). |
1845 | * @slot_count: Number of slots supported. | |
1da177e4 | 1846 | * |
46e42a30 | 1847 | * return: 0 on success, nonzero on failure |
1da177e4 LT |
1848 | */ |
1849 | int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter, | |
1850 | struct dvb_ca_en50221 *pubca, int flags, int slot_count) | |
1851 | { | |
1852 | int ret; | |
1853 | struct dvb_ca_private *ca = NULL; | |
1854 | int i; | |
1855 | ||
46b4f7c1 | 1856 | dprintk("%s\n", __func__); |
1da177e4 LT |
1857 | |
1858 | if (slot_count < 1) | |
1859 | return -EINVAL; | |
1860 | ||
1861 | /* initialise the system data */ | |
bacba9e5 JJ |
1862 | ca = kzalloc(sizeof(*ca), GFP_KERNEL); |
1863 | if (!ca) { | |
1da177e4 | 1864 | ret = -ENOMEM; |
a2bbf5d0 | 1865 | goto exit; |
1da177e4 | 1866 | } |
da677fe1 | 1867 | kref_init(&ca->refcount); |
1da177e4 LT |
1868 | ca->pub = pubca; |
1869 | ca->flags = flags; | |
1870 | ca->slot_count = slot_count; | |
bacba9e5 JJ |
1871 | ca->slot_info = kcalloc(slot_count, sizeof(struct dvb_ca_slot), |
1872 | GFP_KERNEL); | |
1873 | if (!ca->slot_info) { | |
1da177e4 | 1874 | ret = -ENOMEM; |
a2bbf5d0 | 1875 | goto free_ca; |
1da177e4 | 1876 | } |
1da177e4 | 1877 | init_waitqueue_head(&ca->wait_queue); |
1da177e4 LT |
1878 | ca->open = 0; |
1879 | ca->wakeup = 0; | |
1880 | ca->next_read_slot = 0; | |
1881 | pubca->private = ca; | |
1882 | ||
1883 | /* register the DVB device */ | |
96375b7a JJ |
1884 | ret = dvb_register_device(dvb_adapter, &ca->dvbdev, &dvbdev_ca, ca, |
1885 | DVB_DEVICE_CA, 0); | |
1da177e4 | 1886 | if (ret) |
a2bbf5d0 | 1887 | goto free_slot_info; |
1da177e4 LT |
1888 | |
1889 | /* now initialise each slot */ | |
1890 | for (i = 0; i < slot_count; i++) { | |
a75aa90c JJ |
1891 | struct dvb_ca_slot *sl = &ca->slot_info[i]; |
1892 | ||
1893 | memset(sl, 0, sizeof(struct dvb_ca_slot)); | |
1894 | sl->slot_state = DVB_CA_SLOTSTATE_NONE; | |
1895 | atomic_set(&sl->camchange_count, 0); | |
1896 | sl->camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; | |
1897 | mutex_init(&sl->slot_lock); | |
1da177e4 LT |
1898 | } |
1899 | ||
30ad64b8 NS |
1900 | mutex_init(&ca->ioctl_mutex); |
1901 | ||
1da177e4 LT |
1902 | if (signal_pending(current)) { |
1903 | ret = -EINTR; | |
a2bbf5d0 | 1904 | goto unregister_device; |
1da177e4 LT |
1905 | } |
1906 | mb(); | |
1907 | ||
1908 | /* create a kthread for monitoring this CA device */ | |
9320874a CH |
1909 | ca->thread = kthread_run(dvb_ca_en50221_thread, ca, "kdvb-ca-%i:%i", |
1910 | ca->dvbdev->adapter->num, ca->dvbdev->id); | |
1911 | if (IS_ERR(ca->thread)) { | |
1912 | ret = PTR_ERR(ca->thread); | |
b3ad24d2 MCC |
1913 | pr_err("dvb_ca_init: failed to start kernel_thread (%d)\n", |
1914 | ret); | |
a2bbf5d0 | 1915 | goto unregister_device; |
1da177e4 | 1916 | } |
1da177e4 LT |
1917 | return 0; |
1918 | ||
a2bbf5d0 ME |
1919 | unregister_device: |
1920 | dvb_unregister_device(ca->dvbdev); | |
1921 | free_slot_info: | |
1922 | kfree(ca->slot_info); | |
1923 | free_ca: | |
1924 | kfree(ca); | |
1925 | exit: | |
1da177e4 LT |
1926 | pubca->private = NULL; |
1927 | return ret; | |
1928 | } | |
82ec19e4 | 1929 | EXPORT_SYMBOL(dvb_ca_en50221_init); |
1da177e4 | 1930 | |
1da177e4 LT |
1931 | /** |
1932 | * Release a DVB CA EN50221 interface device. | |
1933 | * | |
46e42a30 | 1934 | * @pubca: The associated dvb_ca instance. |
1da177e4 LT |
1935 | */ |
1936 | void dvb_ca_en50221_release(struct dvb_ca_en50221 *pubca) | |
1937 | { | |
0c53c70f | 1938 | struct dvb_ca_private *ca = pubca->private; |
1da177e4 LT |
1939 | int i; |
1940 | ||
46b4f7c1 | 1941 | dprintk("%s\n", __func__); |
1da177e4 LT |
1942 | |
1943 | /* shutdown the thread if there was one */ | |
9320874a | 1944 | kthread_stop(ca->thread); |
1da177e4 | 1945 | |
7bd8cc8f | 1946 | for (i = 0; i < ca->slot_count; i++) |
1da177e4 | 1947 | dvb_ca_en50221_slot_shutdown(ca, i); |
7bd8cc8f | 1948 | |
4d5030b6 | 1949 | dvb_remove_device(ca->dvbdev); |
da677fe1 | 1950 | dvb_ca_private_put(ca); |
1da177e4 LT |
1951 | pubca->private = NULL; |
1952 | } | |
82ec19e4 | 1953 | EXPORT_SYMBOL(dvb_ca_en50221_release); |