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a0c7056f | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * dvb_ca.c: generic DVB functions for EN50221 CAM interfaces | |
4 | * | |
5 | * Copyright (C) 2004 Andrew de Quincey | |
6 | * | |
7 | * Parts of this file were based on sources as follows: | |
8 | * | |
9 | * Copyright (C) 2003 Ralph Metzler <rjkm@metzlerbros.de> | |
10 | * | |
11 | * based on code: | |
12 | * | |
13 | * Copyright (C) 1999-2002 Ralph Metzler | |
14 | * & Marcus Metzler for convergence integrated media GmbH | |
1da177e4 LT |
15 | */ |
16 | ||
b3ad24d2 MCC |
17 | #define pr_fmt(fmt) "dvb_ca_en50221: " fmt |
18 | ||
1da177e4 LT |
19 | #include <linux/errno.h> |
20 | #include <linux/slab.h> | |
21 | #include <linux/list.h> | |
22 | #include <linux/module.h> | |
4f5ab5d7 | 23 | #include <linux/nospec.h> |
1da177e4 LT |
24 | #include <linux/vmalloc.h> |
25 | #include <linux/delay.h> | |
ded92846 | 26 | #include <linux/spinlock.h> |
174cd4b1 | 27 | #include <linux/sched/signal.h> |
9320874a | 28 | #include <linux/kthread.h> |
1da177e4 | 29 | |
fada1935 MCC |
30 | #include <media/dvb_ca_en50221.h> |
31 | #include <media/dvb_ringbuffer.h> | |
1da177e4 LT |
32 | |
33 | static int dvb_ca_en50221_debug; | |
34 | ||
35 | module_param_named(cam_debug, dvb_ca_en50221_debug, int, 0644); | |
36 | MODULE_PARM_DESC(cam_debug, "enable verbose debug messages"); | |
37 | ||
b3ad24d2 MCC |
38 | #define dprintk(fmt, arg...) do { \ |
39 | if (dvb_ca_en50221_debug) \ | |
40 | printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg);\ | |
41 | } while (0) | |
1da177e4 | 42 | |
50b447d5 | 43 | #define INIT_TIMEOUT_SECS 10 |
1da177e4 LT |
44 | |
45 | #define HOST_LINK_BUF_SIZE 0x200 | |
46 | ||
47 | #define RX_BUFFER_SIZE 65535 | |
48 | ||
49 | #define MAX_RX_PACKETS_PER_ITERATION 10 | |
50 | ||
51 | #define CTRLIF_DATA 0 | |
52 | #define CTRLIF_COMMAND 1 | |
53 | #define CTRLIF_STATUS 1 | |
54 | #define CTRLIF_SIZE_LOW 2 | |
55 | #define CTRLIF_SIZE_HIGH 3 | |
56 | ||
57 | #define CMDREG_HC 1 /* Host control */ | |
58 | #define CMDREG_SW 2 /* Size write */ | |
59 | #define CMDREG_SR 4 /* Size read */ | |
60 | #define CMDREG_RS 8 /* Reset interface */ | |
61 | #define CMDREG_FRIE 0x40 /* Enable FR interrupt */ | |
62 | #define CMDREG_DAIE 0x80 /* Enable DA interrupt */ | |
63 | #define IRQEN (CMDREG_DAIE) | |
64 | ||
65 | #define STATUSREG_RE 1 /* read error */ | |
66 | #define STATUSREG_WE 2 /* write error */ | |
67 | #define STATUSREG_FR 0x40 /* module free */ | |
68 | #define STATUSREG_DA 0x80 /* data available */ | |
1da177e4 LT |
69 | |
70 | #define DVB_CA_SLOTSTATE_NONE 0 | |
71 | #define DVB_CA_SLOTSTATE_UNINITIALISED 1 | |
72 | #define DVB_CA_SLOTSTATE_RUNNING 2 | |
73 | #define DVB_CA_SLOTSTATE_INVALID 3 | |
74 | #define DVB_CA_SLOTSTATE_WAITREADY 4 | |
75 | #define DVB_CA_SLOTSTATE_VALIDATE 5 | |
76 | #define DVB_CA_SLOTSTATE_WAITFR 6 | |
77 | #define DVB_CA_SLOTSTATE_LINKINIT 7 | |
78 | ||
1da177e4 LT |
79 | /* Information on a CA slot */ |
80 | struct dvb_ca_slot { | |
1da177e4 LT |
81 | /* current state of the CAM */ |
82 | int slot_state; | |
83 | ||
d7e43844 MD |
84 | /* mutex used for serializing access to one CI slot */ |
85 | struct mutex slot_lock; | |
86 | ||
1da177e4 LT |
87 | /* Number of CAMCHANGES that have occurred since last processing */ |
88 | atomic_t camchange_count; | |
89 | ||
90 | /* Type of last CAMCHANGE */ | |
91 | int camchange_type; | |
92 | ||
93 | /* base address of CAM config */ | |
94 | u32 config_base; | |
95 | ||
96 | /* value to write into Config Control register */ | |
97 | u8 config_option; | |
98 | ||
99 | /* if 1, the CAM supports DA IRQs */ | |
100 | u8 da_irq_supported:1; | |
101 | ||
102 | /* size of the buffer to use when talking to the CAM */ | |
103 | int link_buf_size; | |
104 | ||
1da177e4 LT |
105 | /* buffer for incoming packets */ |
106 | struct dvb_ringbuffer rx_buffer; | |
107 | ||
108 | /* timer used during various states of the slot */ | |
109 | unsigned long timeout; | |
110 | }; | |
111 | ||
112 | /* Private CA-interface information */ | |
113 | struct dvb_ca_private { | |
da677fe1 | 114 | struct kref refcount; |
1da177e4 LT |
115 | |
116 | /* pointer back to the public data structure */ | |
117 | struct dvb_ca_en50221 *pub; | |
118 | ||
119 | /* the DVB device */ | |
120 | struct dvb_device *dvbdev; | |
121 | ||
122 | /* Flags describing the interface (DVB_CA_FLAG_*) */ | |
123 | u32 flags; | |
124 | ||
125 | /* number of slots supported by this CA interface */ | |
126 | unsigned int slot_count; | |
127 | ||
128 | /* information on each slot */ | |
129 | struct dvb_ca_slot *slot_info; | |
130 | ||
131 | /* wait queues for read() and write() operations */ | |
132 | wait_queue_head_t wait_queue; | |
133 | ||
134 | /* PID of the monitoring thread */ | |
9320874a | 135 | struct task_struct *thread; |
1da177e4 LT |
136 | |
137 | /* Flag indicating if the CA device is open */ | |
138 | unsigned int open:1; | |
139 | ||
140 | /* Flag indicating the thread should wake up now */ | |
141 | unsigned int wakeup:1; | |
142 | ||
143 | /* Delay the main thread should use */ | |
144 | unsigned long delay; | |
145 | ||
96375b7a JJ |
146 | /* |
147 | * Slot to start looking for data to read from in the next user-space | |
148 | * read operation | |
149 | */ | |
1da177e4 | 150 | int next_read_slot; |
30ad64b8 NS |
151 | |
152 | /* mutex serializing ioctls */ | |
153 | struct mutex ioctl_mutex; | |
1da177e4 LT |
154 | }; |
155 | ||
bd3df3c5 MK |
156 | static void dvb_ca_private_free(struct dvb_ca_private *ca) |
157 | { | |
158 | unsigned int i; | |
159 | ||
4d5030b6 | 160 | dvb_free_device(ca->dvbdev); |
bd3df3c5 MK |
161 | for (i = 0; i < ca->slot_count; i++) |
162 | vfree(ca->slot_info[i].rx_buffer.data); | |
163 | ||
164 | kfree(ca->slot_info); | |
165 | kfree(ca); | |
166 | } | |
167 | ||
da677fe1 MK |
168 | static void dvb_ca_private_release(struct kref *ref) |
169 | { | |
fbabbddd JJ |
170 | struct dvb_ca_private *ca; |
171 | ||
172 | ca = container_of(ref, struct dvb_ca_private, refcount); | |
da677fe1 MK |
173 | dvb_ca_private_free(ca); |
174 | } | |
175 | ||
176 | static void dvb_ca_private_get(struct dvb_ca_private *ca) | |
177 | { | |
178 | kref_get(&ca->refcount); | |
179 | } | |
180 | ||
181 | static void dvb_ca_private_put(struct dvb_ca_private *ca) | |
182 | { | |
183 | kref_put(&ca->refcount, dvb_ca_private_release); | |
184 | } | |
185 | ||
1da177e4 | 186 | static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca); |
8ec6107a JJ |
187 | static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, |
188 | u8 *ebuf, int ecount); | |
189 | static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, | |
190 | u8 *ebuf, int ecount); | |
1da177e4 | 191 | |
1da177e4 LT |
192 | /** |
193 | * Safely find needle in haystack. | |
194 | * | |
fbefb1a8 MCC |
195 | * @haystack: Buffer to look in. |
196 | * @hlen: Number of bytes in haystack. | |
197 | * @needle: Buffer to find. | |
198 | * @nlen: Number of bytes in needle. | |
46e42a30 | 199 | * return: Pointer into haystack needle was found at, or NULL if not found. |
1da177e4 | 200 | */ |
8ec6107a | 201 | static char *findstr(char *haystack, int hlen, char *needle, int nlen) |
1da177e4 LT |
202 | { |
203 | int i; | |
204 | ||
205 | if (hlen < nlen) | |
206 | return NULL; | |
207 | ||
208 | for (i = 0; i <= hlen - nlen; i++) { | |
209 | if (!strncmp(haystack + i, needle, nlen)) | |
210 | return haystack + i; | |
211 | } | |
212 | ||
213 | return NULL; | |
214 | } | |
215 | ||
96375b7a | 216 | /* ************************************************************************** */ |
1da177e4 LT |
217 | /* EN50221 physical interface functions */ |
218 | ||
46e42a30 | 219 | /* |
fbefb1a8 | 220 | * dvb_ca_en50221_check_camstatus - Check CAM status. |
1da177e4 LT |
221 | */ |
222 | static int dvb_ca_en50221_check_camstatus(struct dvb_ca_private *ca, int slot) | |
223 | { | |
a75aa90c | 224 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
225 | int slot_status; |
226 | int cam_present_now; | |
227 | int cam_changed; | |
228 | ||
229 | /* IRQ mode */ | |
7bd8cc8f | 230 | if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE) |
a75aa90c | 231 | return (atomic_read(&sl->camchange_count) != 0); |
1da177e4 LT |
232 | |
233 | /* poll mode */ | |
234 | slot_status = ca->pub->poll_slot_status(ca->pub, slot, ca->open); | |
235 | ||
236 | cam_present_now = (slot_status & DVB_CA_EN50221_POLL_CAM_PRESENT) ? 1 : 0; | |
237 | cam_changed = (slot_status & DVB_CA_EN50221_POLL_CAM_CHANGED) ? 1 : 0; | |
238 | if (!cam_changed) { | |
a75aa90c JJ |
239 | int cam_present_old = (sl->slot_state != DVB_CA_SLOTSTATE_NONE); |
240 | ||
1da177e4 LT |
241 | cam_changed = (cam_present_now != cam_present_old); |
242 | } | |
243 | ||
244 | if (cam_changed) { | |
7bd8cc8f | 245 | if (!cam_present_now) |
a75aa90c | 246 | sl->camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; |
7bd8cc8f | 247 | else |
a75aa90c | 248 | sl->camchange_type = DVB_CA_EN50221_CAMCHANGE_INSERTED; |
a75aa90c | 249 | atomic_set(&sl->camchange_count, 1); |
1da177e4 | 250 | } else { |
a75aa90c | 251 | if ((sl->slot_state == DVB_CA_SLOTSTATE_WAITREADY) && |
1da177e4 | 252 | (slot_status & DVB_CA_EN50221_POLL_CAM_READY)) { |
224457a9 | 253 | /* move to validate state if reset is completed */ |
a75aa90c | 254 | sl->slot_state = DVB_CA_SLOTSTATE_VALIDATE; |
1da177e4 LT |
255 | } |
256 | } | |
257 | ||
258 | return cam_changed; | |
259 | } | |
260 | ||
1da177e4 | 261 | /** |
fbefb1a8 MCC |
262 | * dvb_ca_en50221_wait_if_status - Wait for flags to become set on the STATUS |
263 | * register on a CAM interface, checking for errors and timeout. | |
1da177e4 | 264 | * |
fbefb1a8 MCC |
265 | * @ca: CA instance. |
266 | * @slot: Slot on interface. | |
267 | * @waitfor: Flags to wait for. | |
46e42a30 | 268 | * @timeout_hz: Timeout in milliseconds. |
1da177e4 | 269 | * |
46e42a30 | 270 | * return: 0 on success, nonzero on error. |
1da177e4 LT |
271 | */ |
272 | static int dvb_ca_en50221_wait_if_status(struct dvb_ca_private *ca, int slot, | |
273 | u8 waitfor, int timeout_hz) | |
274 | { | |
275 | unsigned long timeout; | |
276 | unsigned long start; | |
277 | ||
46b4f7c1 | 278 | dprintk("%s\n", __func__); |
1da177e4 LT |
279 | |
280 | /* loop until timeout elapsed */ | |
281 | start = jiffies; | |
282 | timeout = jiffies + timeout_hz; | |
283 | while (1) { | |
fbabbddd JJ |
284 | int res; |
285 | ||
1da177e4 | 286 | /* read the status and check for error */ |
fbabbddd | 287 | res = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
1da177e4 LT |
288 | if (res < 0) |
289 | return -EIO; | |
290 | ||
291 | /* if we got the flags, it was successful! */ | |
292 | if (res & waitfor) { | |
b3ad24d2 MCC |
293 | dprintk("%s succeeded timeout:%lu\n", |
294 | __func__, jiffies - start); | |
1da177e4 LT |
295 | return 0; |
296 | } | |
297 | ||
298 | /* check for timeout */ | |
7bd8cc8f | 299 | if (time_after(jiffies, timeout)) |
1da177e4 | 300 | break; |
1da177e4 LT |
301 | |
302 | /* wait for a bit */ | |
b9af29e1 | 303 | usleep_range(1000, 1100); |
1da177e4 LT |
304 | } |
305 | ||
46b4f7c1 | 306 | dprintk("%s failed timeout:%lu\n", __func__, jiffies - start); |
1da177e4 LT |
307 | |
308 | /* if we get here, we've timed out */ | |
309 | return -ETIMEDOUT; | |
310 | } | |
311 | ||
1da177e4 | 312 | /** |
fbefb1a8 | 313 | * dvb_ca_en50221_link_init - Initialise the link layer connection to a CAM. |
1da177e4 | 314 | * |
fbefb1a8 MCC |
315 | * @ca: CA instance. |
316 | * @slot: Slot id. | |
1da177e4 | 317 | * |
46e42a30 | 318 | * return: 0 on success, nonzero on failure. |
1da177e4 LT |
319 | */ |
320 | static int dvb_ca_en50221_link_init(struct dvb_ca_private *ca, int slot) | |
321 | { | |
a75aa90c | 322 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
323 | int ret; |
324 | int buf_size; | |
325 | u8 buf[2]; | |
326 | ||
46b4f7c1 | 327 | dprintk("%s\n", __func__); |
1da177e4 LT |
328 | |
329 | /* we'll be determining these during this function */ | |
a75aa90c | 330 | sl->da_irq_supported = 0; |
1da177e4 | 331 | |
a1ca23d1 JJ |
332 | /* |
333 | * set the host link buffer size temporarily. it will be overwritten | |
334 | * with the real negotiated size later. | |
335 | */ | |
a75aa90c | 336 | sl->link_buf_size = 2; |
1da177e4 LT |
337 | |
338 | /* read the buffer size from the CAM */ | |
bacba9e5 JJ |
339 | ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, |
340 | IRQEN | CMDREG_SR); | |
341 | if (ret) | |
1da177e4 | 342 | return ret; |
5dbddc99 | 343 | ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_DA, HZ); |
bacba9e5 | 344 | if (ret) |
1da177e4 | 345 | return ret; |
bacba9e5 JJ |
346 | ret = dvb_ca_en50221_read_data(ca, slot, buf, 2); |
347 | if (ret != 2) | |
1da177e4 | 348 | return -EIO; |
bacba9e5 JJ |
349 | ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN); |
350 | if (ret) | |
1da177e4 LT |
351 | return ret; |
352 | ||
96375b7a JJ |
353 | /* |
354 | * store it, and choose the minimum of our buffer and the CAM's buffer | |
355 | * size | |
356 | */ | |
1da177e4 LT |
357 | buf_size = (buf[0] << 8) | buf[1]; |
358 | if (buf_size > HOST_LINK_BUF_SIZE) | |
359 | buf_size = HOST_LINK_BUF_SIZE; | |
a75aa90c | 360 | sl->link_buf_size = buf_size; |
1da177e4 LT |
361 | buf[0] = buf_size >> 8; |
362 | buf[1] = buf_size & 0xff; | |
363 | dprintk("Chosen link buffer size of %i\n", buf_size); | |
364 | ||
365 | /* write the buffer size to the CAM */ | |
bacba9e5 JJ |
366 | ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, |
367 | IRQEN | CMDREG_SW); | |
368 | if (ret) | |
1da177e4 | 369 | return ret; |
bacba9e5 JJ |
370 | ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_FR, HZ / 10); |
371 | if (ret) | |
1da177e4 | 372 | return ret; |
bacba9e5 JJ |
373 | ret = dvb_ca_en50221_write_data(ca, slot, buf, 2); |
374 | if (ret != 2) | |
1da177e4 | 375 | return -EIO; |
bacba9e5 JJ |
376 | ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN); |
377 | if (ret) | |
1da177e4 LT |
378 | return ret; |
379 | ||
380 | /* success */ | |
381 | return 0; | |
382 | } | |
383 | ||
384 | /** | |
fbefb1a8 | 385 | * dvb_ca_en50221_read_tuple - Read a tuple from attribute memory. |
1da177e4 | 386 | * |
fbefb1a8 MCC |
387 | * @ca: CA instance. |
388 | * @slot: Slot id. | |
389 | * @address: Address to read from. Updated. | |
46e42a30 MCC |
390 | * @tuple_type: Tuple id byte. Updated. |
391 | * @tuple_length: Tuple length. Updated. | |
fbefb1a8 | 392 | * @tuple: Dest buffer for tuple (must be 256 bytes). Updated. |
1da177e4 | 393 | * |
46e42a30 | 394 | * return: 0 on success, nonzero on error. |
1da177e4 LT |
395 | */ |
396 | static int dvb_ca_en50221_read_tuple(struct dvb_ca_private *ca, int slot, | |
bacba9e5 JJ |
397 | int *address, int *tuple_type, |
398 | int *tuple_length, u8 *tuple) | |
1da177e4 LT |
399 | { |
400 | int i; | |
bacba9e5 JJ |
401 | int _tuple_type; |
402 | int _tuple_length; | |
1da177e4 LT |
403 | int _address = *address; |
404 | ||
405 | /* grab the next tuple length and type */ | |
bacba9e5 JJ |
406 | _tuple_type = ca->pub->read_attribute_mem(ca->pub, slot, _address); |
407 | if (_tuple_type < 0) | |
408 | return _tuple_type; | |
409 | if (_tuple_type == 0xff) { | |
410 | dprintk("END OF CHAIN TUPLE type:0x%x\n", _tuple_type); | |
1da177e4 | 411 | *address += 2; |
bacba9e5 JJ |
412 | *tuple_type = _tuple_type; |
413 | *tuple_length = 0; | |
1da177e4 LT |
414 | return 0; |
415 | } | |
bacba9e5 JJ |
416 | _tuple_length = ca->pub->read_attribute_mem(ca->pub, slot, |
417 | _address + 2); | |
418 | if (_tuple_length < 0) | |
419 | return _tuple_length; | |
1da177e4 LT |
420 | _address += 4; |
421 | ||
bacba9e5 | 422 | dprintk("TUPLE type:0x%x length:%i\n", _tuple_type, _tuple_length); |
1da177e4 LT |
423 | |
424 | /* read in the whole tuple */ | |
bacba9e5 | 425 | for (i = 0; i < _tuple_length; i++) { |
96375b7a JJ |
426 | tuple[i] = ca->pub->read_attribute_mem(ca->pub, slot, |
427 | _address + (i * 2)); | |
1da177e4 LT |
428 | dprintk(" 0x%02x: 0x%02x %c\n", |
429 | i, tuple[i] & 0xff, | |
430 | ((tuple[i] > 31) && (tuple[i] < 127)) ? tuple[i] : '.'); | |
431 | } | |
bacba9e5 | 432 | _address += (_tuple_length * 2); |
1da177e4 | 433 | |
224457a9 | 434 | /* success */ |
bacba9e5 JJ |
435 | *tuple_type = _tuple_type; |
436 | *tuple_length = _tuple_length; | |
1da177e4 LT |
437 | *address = _address; |
438 | return 0; | |
439 | } | |
440 | ||
1da177e4 | 441 | /** |
fbefb1a8 MCC |
442 | * dvb_ca_en50221_parse_attributes - Parse attribute memory of a CAM module, |
443 | * extracting Config register, and checking it is a DVB CAM module. | |
1da177e4 | 444 | * |
fbefb1a8 MCC |
445 | * @ca: CA instance. |
446 | * @slot: Slot id. | |
1da177e4 | 447 | * |
46e42a30 | 448 | * return: 0 on success, <0 on failure. |
1da177e4 LT |
449 | */ |
450 | static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot) | |
451 | { | |
a75aa90c | 452 | struct dvb_ca_slot *sl; |
1da177e4 | 453 | int address = 0; |
bacba9e5 JJ |
454 | int tuple_length; |
455 | int tuple_type; | |
1da177e4 LT |
456 | u8 tuple[257]; |
457 | char *dvb_str; | |
458 | int rasz; | |
459 | int status; | |
460 | int got_cftableentry = 0; | |
461 | int end_chain = 0; | |
462 | int i; | |
463 | u16 manfid = 0; | |
464 | u16 devid = 0; | |
465 | ||
224457a9 | 466 | /* CISTPL_DEVICE_0A */ |
bacba9e5 JJ |
467 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, |
468 | &tuple_length, tuple); | |
469 | if (status < 0) | |
1da177e4 | 470 | return status; |
bacba9e5 | 471 | if (tuple_type != 0x1D) |
1da177e4 LT |
472 | return -EINVAL; |
473 | ||
224457a9 | 474 | /* CISTPL_DEVICE_0C */ |
bacba9e5 JJ |
475 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, |
476 | &tuple_length, tuple); | |
477 | if (status < 0) | |
1da177e4 | 478 | return status; |
bacba9e5 | 479 | if (tuple_type != 0x1C) |
1da177e4 LT |
480 | return -EINVAL; |
481 | ||
224457a9 | 482 | /* CISTPL_VERS_1 */ |
bacba9e5 JJ |
483 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, |
484 | &tuple_length, tuple); | |
485 | if (status < 0) | |
1da177e4 | 486 | return status; |
bacba9e5 | 487 | if (tuple_type != 0x15) |
1da177e4 LT |
488 | return -EINVAL; |
489 | ||
224457a9 | 490 | /* CISTPL_MANFID */ |
bacba9e5 JJ |
491 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, |
492 | &tuple_length, tuple); | |
493 | if (status < 0) | |
1da177e4 | 494 | return status; |
bacba9e5 | 495 | if (tuple_type != 0x20) |
1da177e4 | 496 | return -EINVAL; |
bacba9e5 | 497 | if (tuple_length != 4) |
1da177e4 LT |
498 | return -EINVAL; |
499 | manfid = (tuple[1] << 8) | tuple[0]; | |
500 | devid = (tuple[3] << 8) | tuple[2]; | |
501 | ||
224457a9 | 502 | /* CISTPL_CONFIG */ |
bacba9e5 JJ |
503 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, |
504 | &tuple_length, tuple); | |
505 | if (status < 0) | |
1da177e4 | 506 | return status; |
bacba9e5 | 507 | if (tuple_type != 0x1A) |
1da177e4 | 508 | return -EINVAL; |
bacba9e5 | 509 | if (tuple_length < 3) |
1da177e4 LT |
510 | return -EINVAL; |
511 | ||
512 | /* extract the configbase */ | |
513 | rasz = tuple[0] & 3; | |
bacba9e5 | 514 | if (tuple_length < (3 + rasz + 14)) |
1da177e4 | 515 | return -EINVAL; |
a75aa90c JJ |
516 | sl = &ca->slot_info[slot]; |
517 | sl->config_base = 0; | |
518 | for (i = 0; i < rasz + 1; i++) | |
519 | sl->config_base |= (tuple[2 + i] << (8 * i)); | |
1da177e4 LT |
520 | |
521 | /* check it contains the correct DVB string */ | |
bacba9e5 | 522 | dvb_str = findstr((char *)tuple, tuple_length, "DVB_CI_V", 8); |
13b51648 | 523 | if (!dvb_str) |
1da177e4 | 524 | return -EINVAL; |
bacba9e5 | 525 | if (tuple_length < ((dvb_str - (char *)tuple) + 12)) |
1da177e4 LT |
526 | return -EINVAL; |
527 | ||
528 | /* is it a version we support? */ | |
529 | if (strncmp(dvb_str + 8, "1.00", 4)) { | |
b3ad24d2 MCC |
530 | pr_err("dvb_ca adapter %d: Unsupported DVB CAM module version %c%c%c%c\n", |
531 | ca->dvbdev->adapter->num, dvb_str[8], dvb_str[9], | |
532 | dvb_str[10], dvb_str[11]); | |
1da177e4 LT |
533 | return -EINVAL; |
534 | } | |
535 | ||
536 | /* process the CFTABLE_ENTRY tuples, and any after those */ | |
537 | while ((!end_chain) && (address < 0x1000)) { | |
bacba9e5 JJ |
538 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, |
539 | &tuple_type, &tuple_length, | |
540 | tuple); | |
541 | if (status < 0) | |
1da177e4 | 542 | return status; |
bacba9e5 | 543 | switch (tuple_type) { |
224457a9 | 544 | case 0x1B: /* CISTPL_CFTABLE_ENTRY */ |
bacba9e5 | 545 | if (tuple_length < (2 + 11 + 17)) |
1da177e4 LT |
546 | break; |
547 | ||
548 | /* if we've already parsed one, just use it */ | |
549 | if (got_cftableentry) | |
550 | break; | |
551 | ||
552 | /* get the config option */ | |
a75aa90c | 553 | sl->config_option = tuple[0] & 0x3f; |
1da177e4 LT |
554 | |
555 | /* OK, check it contains the correct strings */ | |
bacba9e5 JJ |
556 | if (!findstr((char *)tuple, tuple_length, |
557 | "DVB_HOST", 8) || | |
558 | !findstr((char *)tuple, tuple_length, | |
559 | "DVB_CI_MODULE", 13)) | |
1da177e4 LT |
560 | break; |
561 | ||
562 | got_cftableentry = 1; | |
563 | break; | |
564 | ||
224457a9 | 565 | case 0x14: /* CISTPL_NO_LINK */ |
1da177e4 LT |
566 | break; |
567 | ||
224457a9 | 568 | case 0xFF: /* CISTPL_END */ |
1da177e4 LT |
569 | end_chain = 1; |
570 | break; | |
571 | ||
96375b7a | 572 | default: /* Unknown tuple type - just skip this tuple */ |
b3ad24d2 | 573 | dprintk("dvb_ca: Skipping unknown tuple type:0x%x length:0x%x\n", |
bacba9e5 | 574 | tuple_type, tuple_length); |
1da177e4 LT |
575 | break; |
576 | } | |
577 | } | |
578 | ||
579 | if ((address > 0x1000) || (!got_cftableentry)) | |
580 | return -EINVAL; | |
581 | ||
582 | dprintk("Valid DVB CAM detected MANID:%x DEVID:%x CONFIGBASE:0x%x CONFIGOPTION:0x%x\n", | |
a75aa90c | 583 | manfid, devid, sl->config_base, sl->config_option); |
1da177e4 | 584 | |
224457a9 | 585 | /* success! */ |
1da177e4 LT |
586 | return 0; |
587 | } | |
588 | ||
1da177e4 | 589 | /** |
fbefb1a8 | 590 | * dvb_ca_en50221_set_configoption - Set CAM's configoption correctly. |
1da177e4 | 591 | * |
fbefb1a8 MCC |
592 | * @ca: CA instance. |
593 | * @slot: Slot containing the CAM. | |
1da177e4 LT |
594 | */ |
595 | static int dvb_ca_en50221_set_configoption(struct dvb_ca_private *ca, int slot) | |
596 | { | |
a75aa90c | 597 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
598 | int configoption; |
599 | ||
46b4f7c1 | 600 | dprintk("%s\n", __func__); |
1da177e4 LT |
601 | |
602 | /* set the config option */ | |
a75aa90c JJ |
603 | ca->pub->write_attribute_mem(ca->pub, slot, sl->config_base, |
604 | sl->config_option); | |
1da177e4 LT |
605 | |
606 | /* check it */ | |
a75aa90c JJ |
607 | configoption = ca->pub->read_attribute_mem(ca->pub, slot, |
608 | sl->config_base); | |
1da177e4 | 609 | dprintk("Set configoption 0x%x, read configoption 0x%x\n", |
a75aa90c | 610 | sl->config_option, configoption & 0x3f); |
1da177e4 LT |
611 | |
612 | /* fine! */ | |
613 | return 0; | |
1da177e4 LT |
614 | } |
615 | ||
1da177e4 | 616 | /** |
fbefb1a8 MCC |
617 | * dvb_ca_en50221_read_data - This function talks to an EN50221 CAM control |
618 | * interface. It reads a buffer of data from the CAM. The data can either | |
619 | * be stored in a supplied buffer, or automatically be added to the slot's | |
620 | * rx_buffer. | |
1da177e4 | 621 | * |
fbefb1a8 MCC |
622 | * @ca: CA instance. |
623 | * @slot: Slot to read from. | |
624 | * @ebuf: If non-NULL, the data will be written to this buffer. If NULL, | |
46e42a30 MCC |
625 | * the data will be added into the buffering system as a normal |
626 | * fragment. | |
fbefb1a8 | 627 | * @ecount: Size of ebuf. Ignored if ebuf is NULL. |
1da177e4 | 628 | * |
46e42a30 | 629 | * return: Number of bytes read, or < 0 on error |
1da177e4 | 630 | */ |
8ec6107a JJ |
631 | static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, |
632 | u8 *ebuf, int ecount) | |
1da177e4 | 633 | { |
a75aa90c | 634 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
635 | int bytes_read; |
636 | int status; | |
637 | u8 buf[HOST_LINK_BUF_SIZE]; | |
638 | int i; | |
639 | ||
46b4f7c1 | 640 | dprintk("%s\n", __func__); |
1da177e4 LT |
641 | |
642 | /* check if we have space for a link buf in the rx_buffer */ | |
13b51648 | 643 | if (!ebuf) { |
1da177e4 LT |
644 | int buf_free; |
645 | ||
a75aa90c | 646 | if (!sl->rx_buffer.data) { |
1da177e4 LT |
647 | status = -EIO; |
648 | goto exit; | |
649 | } | |
a75aa90c | 650 | buf_free = dvb_ringbuffer_free(&sl->rx_buffer); |
1da177e4 | 651 | |
a75aa90c | 652 | if (buf_free < (sl->link_buf_size + |
f894165c | 653 | DVB_RINGBUFFER_PKTHDRSIZE)) { |
1da177e4 LT |
654 | status = -EAGAIN; |
655 | goto exit; | |
656 | } | |
657 | } | |
658 | ||
f894165c | 659 | if (ca->pub->read_data && |
a75aa90c | 660 | (sl->slot_state != DVB_CA_SLOTSTATE_LINKINIT)) { |
13b51648 | 661 | if (!ebuf) |
f894165c RM |
662 | status = ca->pub->read_data(ca->pub, slot, buf, |
663 | sizeof(buf)); | |
664 | else | |
665 | status = ca->pub->read_data(ca->pub, slot, buf, ecount); | |
666 | if (status < 0) | |
667 | return status; | |
668 | bytes_read = status; | |
669 | if (status == 0) | |
670 | goto exit; | |
671 | } else { | |
f894165c RM |
672 | /* check if there is data available */ |
673 | status = ca->pub->read_cam_control(ca->pub, slot, | |
674 | CTRLIF_STATUS); | |
675 | if (status < 0) | |
1da177e4 | 676 | goto exit; |
f894165c RM |
677 | if (!(status & STATUSREG_DA)) { |
678 | /* no data */ | |
679 | status = 0; | |
1da177e4 LT |
680 | goto exit; |
681 | } | |
f894165c RM |
682 | |
683 | /* read the amount of data */ | |
684 | status = ca->pub->read_cam_control(ca->pub, slot, | |
685 | CTRLIF_SIZE_HIGH); | |
686 | if (status < 0) | |
687 | goto exit; | |
688 | bytes_read = status << 8; | |
689 | status = ca->pub->read_cam_control(ca->pub, slot, | |
690 | CTRLIF_SIZE_LOW); | |
691 | if (status < 0) | |
1da177e4 | 692 | goto exit; |
f894165c RM |
693 | bytes_read |= status; |
694 | ||
695 | /* check it will fit */ | |
13b51648 | 696 | if (!ebuf) { |
a75aa90c | 697 | if (bytes_read > sl->link_buf_size) { |
f894165c RM |
698 | pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the link buffer size (%i > %i)!\n", |
699 | ca->dvbdev->adapter->num, bytes_read, | |
a75aa90c JJ |
700 | sl->link_buf_size); |
701 | sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
f894165c RM |
702 | status = -EIO; |
703 | goto exit; | |
704 | } | |
705 | if (bytes_read < 2) { | |
706 | pr_err("dvb_ca adapter %d: CAM sent a buffer that was less than 2 bytes!\n", | |
707 | ca->dvbdev->adapter->num); | |
a75aa90c | 708 | sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; |
f894165c RM |
709 | status = -EIO; |
710 | goto exit; | |
711 | } | |
712 | } else { | |
713 | if (bytes_read > ecount) { | |
714 | pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the ecount size!\n", | |
715 | ca->dvbdev->adapter->num); | |
716 | status = -EIO; | |
717 | goto exit; | |
718 | } | |
1da177e4 | 719 | } |
1da177e4 | 720 | |
f894165c RM |
721 | /* fill the buffer */ |
722 | for (i = 0; i < bytes_read; i++) { | |
723 | /* read byte and check */ | |
724 | status = ca->pub->read_cam_control(ca->pub, slot, | |
725 | CTRLIF_DATA); | |
726 | if (status < 0) | |
727 | goto exit; | |
1da177e4 | 728 | |
f894165c RM |
729 | /* OK, store it in the buffer */ |
730 | buf[i] = status; | |
731 | } | |
1da177e4 | 732 | |
f894165c RM |
733 | /* check for read error (RE should now be 0) */ |
734 | status = ca->pub->read_cam_control(ca->pub, slot, | |
735 | CTRLIF_STATUS); | |
736 | if (status < 0) | |
737 | goto exit; | |
738 | if (status & STATUSREG_RE) { | |
a75aa90c | 739 | sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; |
f894165c RM |
740 | status = -EIO; |
741 | goto exit; | |
742 | } | |
1da177e4 LT |
743 | } |
744 | ||
96375b7a JJ |
745 | /* |
746 | * OK, add it to the receive buffer, or copy into external buffer if | |
747 | * supplied | |
748 | */ | |
13b51648 | 749 | if (!ebuf) { |
a75aa90c | 750 | if (!sl->rx_buffer.data) { |
1da177e4 LT |
751 | status = -EIO; |
752 | goto exit; | |
753 | } | |
a75aa90c | 754 | dvb_ringbuffer_pkt_write(&sl->rx_buffer, buf, bytes_read); |
1da177e4 LT |
755 | } else { |
756 | memcpy(ebuf, buf, bytes_read); | |
757 | } | |
758 | ||
759 | dprintk("Received CA packet for slot %i connection id 0x%x last_frag:%i size:0x%x\n", slot, | |
760 | buf[0], (buf[1] & 0x80) == 0, bytes_read); | |
761 | ||
762 | /* wake up readers when a last_fragment is received */ | |
7bd8cc8f | 763 | if ((buf[1] & 0x80) == 0x00) |
1da177e4 | 764 | wake_up_interruptible(&ca->wait_queue); |
7bd8cc8f | 765 | |
1da177e4 LT |
766 | status = bytes_read; |
767 | ||
768 | exit: | |
769 | return status; | |
770 | } | |
771 | ||
1da177e4 | 772 | /** |
fbefb1a8 MCC |
773 | * dvb_ca_en50221_write_data - This function talks to an EN50221 CAM control |
774 | * interface. It writes a buffer of data to a CAM. | |
1da177e4 | 775 | * |
fbefb1a8 MCC |
776 | * @ca: CA instance. |
777 | * @slot: Slot to write to. | |
46e42a30 | 778 | * @buf: The data in this buffer is treated as a complete link-level packet to |
4a3fad70 | 779 | * be written. |
46e42a30 | 780 | * @bytes_write: Size of ebuf. |
1da177e4 | 781 | * |
46e42a30 | 782 | * return: Number of bytes written, or < 0 on error. |
1da177e4 | 783 | */ |
8ec6107a JJ |
784 | static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, |
785 | u8 *buf, int bytes_write) | |
1da177e4 | 786 | { |
a75aa90c | 787 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
788 | int status; |
789 | int i; | |
790 | ||
46b4f7c1 | 791 | dprintk("%s\n", __func__); |
1da177e4 | 792 | |
d7e43844 | 793 | /* sanity check */ |
a75aa90c | 794 | if (bytes_write > sl->link_buf_size) |
1da177e4 LT |
795 | return -EINVAL; |
796 | ||
f894165c | 797 | if (ca->pub->write_data && |
a75aa90c | 798 | (sl->slot_state != DVB_CA_SLOTSTATE_LINKINIT)) |
f894165c RM |
799 | return ca->pub->write_data(ca->pub, slot, buf, bytes_write); |
800 | ||
a1ca23d1 JJ |
801 | /* |
802 | * it is possible we are dealing with a single buffer implementation, | |
803 | * thus if there is data available for read or if there is even a read | |
804 | * already in progress, we do nothing but awake the kernel thread to | |
805 | * process the data if necessary. | |
806 | */ | |
bacba9e5 JJ |
807 | status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
808 | if (status < 0) | |
1da177e4 LT |
809 | goto exitnowrite; |
810 | if (status & (STATUSREG_DA | STATUSREG_RE)) { | |
d7e43844 MD |
811 | if (status & STATUSREG_DA) |
812 | dvb_ca_en50221_thread_wakeup(ca); | |
813 | ||
1da177e4 LT |
814 | status = -EAGAIN; |
815 | goto exitnowrite; | |
816 | } | |
817 | ||
818 | /* OK, set HC bit */ | |
bacba9e5 JJ |
819 | status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, |
820 | IRQEN | CMDREG_HC); | |
821 | if (status) | |
1da177e4 LT |
822 | goto exit; |
823 | ||
824 | /* check if interface is still free */ | |
bacba9e5 JJ |
825 | status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
826 | if (status < 0) | |
1da177e4 LT |
827 | goto exit; |
828 | if (!(status & STATUSREG_FR)) { | |
829 | /* it wasn't free => try again later */ | |
830 | status = -EAGAIN; | |
831 | goto exit; | |
832 | } | |
833 | ||
e7080d44 J |
834 | /* |
835 | * It may need some time for the CAM to settle down, or there might | |
836 | * be a race condition between the CAM, writing HC and our last | |
837 | * check for DA. This happens, if the CAM asserts DA, just after | |
838 | * checking DA before we are setting HC. In this case it might be | |
839 | * a bug in the CAM to keep the FR bit, the lower layer/HW | |
840 | * communication requires a longer timeout or the CAM needs more | |
841 | * time internally. But this happens in reality! | |
842 | * We need to read the status from the HW again and do the same | |
843 | * we did for the previous check for DA | |
844 | */ | |
845 | status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); | |
846 | if (status < 0) | |
847 | goto exit; | |
848 | ||
849 | if (status & (STATUSREG_DA | STATUSREG_RE)) { | |
850 | if (status & STATUSREG_DA) | |
851 | dvb_ca_en50221_thread_wakeup(ca); | |
852 | ||
853 | status = -EAGAIN; | |
854 | goto exit; | |
855 | } | |
856 | ||
1da177e4 | 857 | /* send the amount of data */ |
bacba9e5 JJ |
858 | status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH, |
859 | bytes_write >> 8); | |
860 | if (status) | |
1da177e4 | 861 | goto exit; |
bacba9e5 JJ |
862 | status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW, |
863 | bytes_write & 0xff); | |
864 | if (status) | |
1da177e4 LT |
865 | goto exit; |
866 | ||
867 | /* send the buffer */ | |
868 | for (i = 0; i < bytes_write; i++) { | |
bacba9e5 JJ |
869 | status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_DATA, |
870 | buf[i]); | |
871 | if (status) | |
1da177e4 LT |
872 | goto exit; |
873 | } | |
874 | ||
875 | /* check for write error (WE should now be 0) */ | |
bacba9e5 JJ |
876 | status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
877 | if (status < 0) | |
1da177e4 LT |
878 | goto exit; |
879 | if (status & STATUSREG_WE) { | |
a75aa90c | 880 | sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; |
1da177e4 LT |
881 | status = -EIO; |
882 | goto exit; | |
883 | } | |
884 | status = bytes_write; | |
885 | ||
886 | dprintk("Wrote CA packet for slot %i, connection id 0x%x last_frag:%i size:0x%x\n", slot, | |
887 | buf[0], (buf[1] & 0x80) == 0, bytes_write); | |
888 | ||
889 | exit: | |
890 | ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN); | |
891 | ||
892 | exitnowrite: | |
893 | return status; | |
894 | } | |
1da177e4 | 895 | |
96375b7a | 896 | /* ************************************************************************** */ |
1da177e4 LT |
897 | /* EN50221 higher level functions */ |
898 | ||
1da177e4 | 899 | /** |
97adc2b3 | 900 | * dvb_ca_en50221_slot_shutdown - A CAM has been removed => shut it down. |
1da177e4 | 901 | * |
fbefb1a8 MCC |
902 | * @ca: CA instance. |
903 | * @slot: Slot to shut down. | |
1da177e4 LT |
904 | */ |
905 | static int dvb_ca_en50221_slot_shutdown(struct dvb_ca_private *ca, int slot) | |
906 | { | |
46b4f7c1 | 907 | dprintk("%s\n", __func__); |
1da177e4 | 908 | |
1da177e4 LT |
909 | ca->pub->slot_shutdown(ca->pub, slot); |
910 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1da177e4 | 911 | |
a1ca23d1 JJ |
912 | /* |
913 | * need to wake up all processes to check if they're now trying to | |
914 | * write to a defunct CAM | |
915 | */ | |
1da177e4 LT |
916 | wake_up_interruptible(&ca->wait_queue); |
917 | ||
918 | dprintk("Slot %i shutdown\n", slot); | |
919 | ||
920 | /* success */ | |
921 | return 0; | |
922 | } | |
1da177e4 | 923 | |
1da177e4 | 924 | /** |
97adc2b3 | 925 | * dvb_ca_en50221_camchange_irq - A CAMCHANGE IRQ has occurred. |
1da177e4 | 926 | * |
46e42a30 | 927 | * @pubca: CA instance. |
fbefb1a8 MCC |
928 | * @slot: Slot concerned. |
929 | * @change_type: One of the DVB_CA_CAMCHANGE_* values. | |
1da177e4 | 930 | */ |
96375b7a JJ |
931 | void dvb_ca_en50221_camchange_irq(struct dvb_ca_en50221 *pubca, int slot, |
932 | int change_type) | |
1da177e4 | 933 | { |
0c53c70f | 934 | struct dvb_ca_private *ca = pubca->private; |
a75aa90c | 935 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
936 | |
937 | dprintk("CAMCHANGE IRQ slot:%i change_type:%i\n", slot, change_type); | |
938 | ||
939 | switch (change_type) { | |
940 | case DVB_CA_EN50221_CAMCHANGE_REMOVED: | |
941 | case DVB_CA_EN50221_CAMCHANGE_INSERTED: | |
942 | break; | |
943 | ||
944 | default: | |
945 | return; | |
946 | } | |
947 | ||
a75aa90c JJ |
948 | sl->camchange_type = change_type; |
949 | atomic_inc(&sl->camchange_count); | |
1da177e4 LT |
950 | dvb_ca_en50221_thread_wakeup(ca); |
951 | } | |
97adc2b3 | 952 | EXPORT_SYMBOL(dvb_ca_en50221_camchange_irq); |
1da177e4 | 953 | |
1da177e4 | 954 | /** |
fbefb1a8 | 955 | * dvb_ca_en50221_camready_irq - A CAMREADY IRQ has occurred. |
1da177e4 | 956 | * |
46e42a30 | 957 | * @pubca: CA instance. |
fbefb1a8 | 958 | * @slot: Slot concerned. |
1da177e4 LT |
959 | */ |
960 | void dvb_ca_en50221_camready_irq(struct dvb_ca_en50221 *pubca, int slot) | |
961 | { | |
0c53c70f | 962 | struct dvb_ca_private *ca = pubca->private; |
a75aa90c | 963 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
964 | |
965 | dprintk("CAMREADY IRQ slot:%i\n", slot); | |
966 | ||
a75aa90c JJ |
967 | if (sl->slot_state == DVB_CA_SLOTSTATE_WAITREADY) { |
968 | sl->slot_state = DVB_CA_SLOTSTATE_VALIDATE; | |
1da177e4 LT |
969 | dvb_ca_en50221_thread_wakeup(ca); |
970 | } | |
971 | } | |
97adc2b3 | 972 | EXPORT_SYMBOL(dvb_ca_en50221_camready_irq); |
1da177e4 | 973 | |
1da177e4 | 974 | /** |
97adc2b3 | 975 | * dvb_ca_en50221_frda_irq - An FR or DA IRQ has occurred. |
1da177e4 | 976 | * |
46e42a30 | 977 | * @pubca: CA instance. |
fbefb1a8 | 978 | * @slot: Slot concerned. |
1da177e4 LT |
979 | */ |
980 | void dvb_ca_en50221_frda_irq(struct dvb_ca_en50221 *pubca, int slot) | |
981 | { | |
0c53c70f | 982 | struct dvb_ca_private *ca = pubca->private; |
a75aa90c | 983 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
984 | int flags; |
985 | ||
986 | dprintk("FR/DA IRQ slot:%i\n", slot); | |
987 | ||
a75aa90c | 988 | switch (sl->slot_state) { |
1da177e4 LT |
989 | case DVB_CA_SLOTSTATE_LINKINIT: |
990 | flags = ca->pub->read_cam_control(pubca, slot, CTRLIF_STATUS); | |
991 | if (flags & STATUSREG_DA) { | |
992 | dprintk("CAM supports DA IRQ\n"); | |
a75aa90c | 993 | sl->da_irq_supported = 1; |
1da177e4 LT |
994 | } |
995 | break; | |
996 | ||
997 | case DVB_CA_SLOTSTATE_RUNNING: | |
998 | if (ca->open) | |
ded92846 | 999 | dvb_ca_en50221_thread_wakeup(ca); |
1da177e4 LT |
1000 | break; |
1001 | } | |
1002 | } | |
97adc2b3 | 1003 | EXPORT_SYMBOL(dvb_ca_en50221_frda_irq); |
1da177e4 | 1004 | |
96375b7a | 1005 | /* ************************************************************************** */ |
1da177e4 LT |
1006 | /* EN50221 thread functions */ |
1007 | ||
1008 | /** | |
1009 | * Wake up the DVB CA thread | |
1010 | * | |
fbefb1a8 | 1011 | * @ca: CA instance. |
1da177e4 LT |
1012 | */ |
1013 | static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca) | |
1014 | { | |
46b4f7c1 | 1015 | dprintk("%s\n", __func__); |
1da177e4 LT |
1016 | |
1017 | ca->wakeup = 1; | |
1018 | mb(); | |
9320874a | 1019 | wake_up_process(ca->thread); |
1da177e4 LT |
1020 | } |
1021 | ||
1da177e4 LT |
1022 | /** |
1023 | * Update the delay used by the thread. | |
1024 | * | |
fbefb1a8 | 1025 | * @ca: CA instance. |
1da177e4 LT |
1026 | */ |
1027 | static void dvb_ca_en50221_thread_update_delay(struct dvb_ca_private *ca) | |
1028 | { | |
1029 | int delay; | |
1030 | int curdelay = 100000000; | |
1031 | int slot; | |
1032 | ||
dc32f324 JJ |
1033 | /* |
1034 | * Beware of too high polling frequency, because one polling | |
71a35fe2 RS |
1035 | * call might take several hundred milliseconds until timeout! |
1036 | */ | |
1da177e4 | 1037 | for (slot = 0; slot < ca->slot_count; slot++) { |
a75aa90c JJ |
1038 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1039 | ||
1040 | switch (sl->slot_state) { | |
1da177e4 LT |
1041 | default: |
1042 | case DVB_CA_SLOTSTATE_NONE: | |
71a35fe2 RS |
1043 | delay = HZ * 60; /* 60s */ |
1044 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) | |
1045 | delay = HZ * 5; /* 5s */ | |
1046 | break; | |
1da177e4 | 1047 | case DVB_CA_SLOTSTATE_INVALID: |
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 | break; |
1052 | ||
1053 | case DVB_CA_SLOTSTATE_UNINITIALISED: | |
1054 | case DVB_CA_SLOTSTATE_WAITREADY: | |
1055 | case DVB_CA_SLOTSTATE_VALIDATE: | |
1056 | case DVB_CA_SLOTSTATE_WAITFR: | |
1057 | case DVB_CA_SLOTSTATE_LINKINIT: | |
71a35fe2 | 1058 | delay = HZ / 10; /* 100ms */ |
1da177e4 LT |
1059 | break; |
1060 | ||
1061 | case DVB_CA_SLOTSTATE_RUNNING: | |
71a35fe2 RS |
1062 | delay = HZ * 60; /* 60s */ |
1063 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) | |
1064 | delay = HZ / 10; /* 100ms */ | |
1da177e4 | 1065 | if (ca->open) { |
a75aa90c | 1066 | if ((!sl->da_irq_supported) || |
71a35fe2 RS |
1067 | (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_DA))) |
1068 | delay = HZ / 10; /* 100ms */ | |
1da177e4 LT |
1069 | } |
1070 | break; | |
1071 | } | |
1072 | ||
1073 | if (delay < curdelay) | |
1074 | curdelay = delay; | |
1075 | } | |
1076 | ||
1077 | ca->delay = curdelay; | |
1078 | } | |
1079 | ||
5d023252 JJ |
1080 | /** |
1081 | * Poll if the CAM is gone. | |
1082 | * | |
1083 | * @ca: CA instance. | |
1084 | * @slot: Slot to process. | |
46e42a30 | 1085 | * return:: 0 .. no change |
5d023252 JJ |
1086 | * 1 .. CAM state changed |
1087 | */ | |
1088 | ||
1089 | static int dvb_ca_en50221_poll_cam_gone(struct dvb_ca_private *ca, int slot) | |
1090 | { | |
1091 | int changed = 0; | |
1092 | int status; | |
1093 | ||
1094 | /* | |
1095 | * we need this extra check for annoying interfaces like the | |
1096 | * budget-av | |
1097 | */ | |
1098 | if ((!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) && | |
1099 | (ca->pub->poll_slot_status)) { | |
1100 | status = ca->pub->poll_slot_status(ca->pub, slot, 0); | |
1101 | if (!(status & | |
1102 | DVB_CA_EN50221_POLL_CAM_PRESENT)) { | |
1103 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1104 | dvb_ca_en50221_thread_update_delay(ca); | |
1105 | changed = 1; | |
1106 | } | |
1107 | } | |
1108 | return changed; | |
1109 | } | |
1110 | ||
1da177e4 | 1111 | /** |
a004b70e JJ |
1112 | * Thread state machine for one CA slot to perform the data transfer. |
1113 | * | |
1114 | * @ca: CA instance. | |
1115 | * @slot: Slot to process. | |
1da177e4 | 1116 | */ |
a004b70e JJ |
1117 | static void dvb_ca_en50221_thread_state_machine(struct dvb_ca_private *ca, |
1118 | int slot) | |
1da177e4 | 1119 | { |
a004b70e | 1120 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 | 1121 | int flags; |
1da177e4 LT |
1122 | int pktcount; |
1123 | void *rxbuf; | |
1124 | ||
a004b70e | 1125 | mutex_lock(&sl->slot_lock); |
1da177e4 | 1126 | |
a004b70e JJ |
1127 | /* check the cam status + deal with CAMCHANGEs */ |
1128 | while (dvb_ca_en50221_check_camstatus(ca, slot)) { | |
1129 | /* clear down an old CI slot if necessary */ | |
1130 | if (sl->slot_state != DVB_CA_SLOTSTATE_NONE) | |
1131 | dvb_ca_en50221_slot_shutdown(ca, slot); | |
1da177e4 | 1132 | |
a004b70e JJ |
1133 | /* if a CAM is NOW present, initialise it */ |
1134 | if (sl->camchange_type == DVB_CA_EN50221_CAMCHANGE_INSERTED) | |
1135 | sl->slot_state = DVB_CA_SLOTSTATE_UNINITIALISED; | |
1da177e4 | 1136 | |
a004b70e JJ |
1137 | /* we've handled one CAMCHANGE */ |
1138 | dvb_ca_en50221_thread_update_delay(ca); | |
1139 | atomic_dec(&sl->camchange_count); | |
1140 | } | |
1da177e4 | 1141 | |
a004b70e JJ |
1142 | /* CAM state machine */ |
1143 | switch (sl->slot_state) { | |
1144 | case DVB_CA_SLOTSTATE_NONE: | |
1145 | case DVB_CA_SLOTSTATE_INVALID: | |
1146 | /* no action needed */ | |
1147 | break; | |
1da177e4 | 1148 | |
a004b70e JJ |
1149 | case DVB_CA_SLOTSTATE_UNINITIALISED: |
1150 | sl->slot_state = DVB_CA_SLOTSTATE_WAITREADY; | |
1151 | ca->pub->slot_reset(ca->pub, slot); | |
1152 | sl->timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); | |
1153 | break; | |
1da177e4 | 1154 | |
a004b70e JJ |
1155 | case DVB_CA_SLOTSTATE_WAITREADY: |
1156 | if (time_after(jiffies, sl->timeout)) { | |
1157 | pr_err("dvb_ca adaptor %d: PC card did not respond :(\n", | |
1158 | ca->dvbdev->adapter->num); | |
1159 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1160 | dvb_ca_en50221_thread_update_delay(ca); | |
1161 | break; | |
1162 | } | |
1163 | /* | |
1164 | * no other action needed; will automatically change state when | |
1165 | * ready | |
1166 | */ | |
1167 | break; | |
1da177e4 | 1168 | |
a004b70e JJ |
1169 | case DVB_CA_SLOTSTATE_VALIDATE: |
1170 | if (dvb_ca_en50221_parse_attributes(ca, slot) != 0) { | |
5d023252 JJ |
1171 | if (dvb_ca_en50221_poll_cam_gone(ca, slot)) |
1172 | break; | |
1da177e4 | 1173 | |
a004b70e JJ |
1174 | pr_err("dvb_ca adapter %d: Invalid PC card inserted :(\n", |
1175 | ca->dvbdev->adapter->num); | |
1176 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1177 | dvb_ca_en50221_thread_update_delay(ca); | |
1178 | break; | |
1179 | } | |
1180 | if (dvb_ca_en50221_set_configoption(ca, slot) != 0) { | |
1181 | pr_err("dvb_ca adapter %d: Unable to initialise CAM :(\n", | |
1182 | ca->dvbdev->adapter->num); | |
1183 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1184 | dvb_ca_en50221_thread_update_delay(ca); | |
1185 | break; | |
1186 | } | |
1187 | if (ca->pub->write_cam_control(ca->pub, slot, | |
1188 | CTRLIF_COMMAND, | |
1189 | CMDREG_RS) != 0) { | |
1190 | pr_err("dvb_ca adapter %d: Unable to reset CAM IF\n", | |
1191 | ca->dvbdev->adapter->num); | |
1192 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1193 | dvb_ca_en50221_thread_update_delay(ca); | |
1194 | break; | |
1195 | } | |
1196 | dprintk("DVB CAM validated successfully\n"); | |
1da177e4 | 1197 | |
a004b70e JJ |
1198 | sl->timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); |
1199 | sl->slot_state = DVB_CA_SLOTSTATE_WAITFR; | |
1200 | ca->wakeup = 1; | |
1201 | break; | |
1da177e4 | 1202 | |
a004b70e JJ |
1203 | case DVB_CA_SLOTSTATE_WAITFR: |
1204 | if (time_after(jiffies, sl->timeout)) { | |
1205 | pr_err("dvb_ca adapter %d: DVB CAM did not respond :(\n", | |
1206 | ca->dvbdev->adapter->num); | |
1207 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1208 | dvb_ca_en50221_thread_update_delay(ca); | |
1209 | break; | |
1210 | } | |
1da177e4 | 1211 | |
a004b70e JJ |
1212 | flags = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
1213 | if (flags & STATUSREG_FR) { | |
1214 | sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
1215 | ca->wakeup = 1; | |
1216 | } | |
1217 | break; | |
1da177e4 | 1218 | |
a004b70e JJ |
1219 | case DVB_CA_SLOTSTATE_LINKINIT: |
1220 | if (dvb_ca_en50221_link_init(ca, slot) != 0) { | |
5d023252 JJ |
1221 | if (dvb_ca_en50221_poll_cam_gone(ca, slot)) |
1222 | break; | |
1da177e4 | 1223 | |
a004b70e JJ |
1224 | pr_err("dvb_ca adapter %d: DVB CAM link initialisation failed :(\n", |
1225 | ca->dvbdev->adapter->num); | |
1226 | sl->slot_state = DVB_CA_SLOTSTATE_UNINITIALISED; | |
1227 | dvb_ca_en50221_thread_update_delay(ca); | |
1228 | break; | |
1229 | } | |
1da177e4 | 1230 | |
a004b70e JJ |
1231 | if (!sl->rx_buffer.data) { |
1232 | rxbuf = vmalloc(RX_BUFFER_SIZE); | |
1233 | if (!rxbuf) { | |
1234 | pr_err("dvb_ca adapter %d: Unable to allocate CAM rx buffer :(\n", | |
b3ad24d2 | 1235 | ca->dvbdev->adapter->num); |
a004b70e JJ |
1236 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; |
1237 | dvb_ca_en50221_thread_update_delay(ca); | |
1da177e4 | 1238 | break; |
a004b70e JJ |
1239 | } |
1240 | dvb_ringbuffer_init(&sl->rx_buffer, rxbuf, | |
1241 | RX_BUFFER_SIZE); | |
1242 | } | |
1da177e4 | 1243 | |
a004b70e JJ |
1244 | ca->pub->slot_ts_enable(ca->pub, slot); |
1245 | sl->slot_state = DVB_CA_SLOTSTATE_RUNNING; | |
1246 | dvb_ca_en50221_thread_update_delay(ca); | |
1aebed32 DS |
1247 | pr_info("dvb_ca adapter %d: DVB CAM detected and initialised successfully\n", |
1248 | ca->dvbdev->adapter->num); | |
a004b70e | 1249 | break; |
1da177e4 | 1250 | |
a004b70e JJ |
1251 | case DVB_CA_SLOTSTATE_RUNNING: |
1252 | if (!ca->open) | |
1253 | break; | |
1254 | ||
1255 | /* poll slots for data */ | |
1256 | pktcount = 0; | |
1257 | while (dvb_ca_en50221_read_data(ca, slot, NULL, 0) > 0) { | |
1258 | if (!ca->open) | |
1259 | break; | |
1260 | ||
1261 | /* | |
1262 | * if a CAMCHANGE occurred at some point, do not do any | |
1263 | * more processing of this slot | |
1264 | */ | |
1265 | if (dvb_ca_en50221_check_camstatus(ca, slot)) { | |
1266 | /* | |
4ecb4bfc | 1267 | * we don't want to sleep on the next iteration |
a004b70e JJ |
1268 | * so we can handle the cam change |
1269 | */ | |
1270 | ca->wakeup = 1; | |
1da177e4 LT |
1271 | break; |
1272 | } | |
d7e43844 | 1273 | |
a004b70e JJ |
1274 | /* check if we've hit our limit this time */ |
1275 | if (++pktcount >= MAX_RX_PACKETS_PER_ITERATION) { | |
1276 | /* | |
4ecb4bfc | 1277 | * don't sleep; there is likely to be more data |
a004b70e JJ |
1278 | * to read |
1279 | */ | |
1280 | ca->wakeup = 1; | |
1281 | break; | |
1282 | } | |
1da177e4 | 1283 | } |
a004b70e JJ |
1284 | break; |
1285 | } | |
1286 | ||
1287 | mutex_unlock(&sl->slot_lock); | |
1288 | } | |
1289 | ||
46e42a30 | 1290 | /* |
a004b70e JJ |
1291 | * Kernel thread which monitors CA slots for CAM changes, and performs data |
1292 | * transfers. | |
1293 | */ | |
1294 | static int dvb_ca_en50221_thread(void *data) | |
1295 | { | |
1296 | struct dvb_ca_private *ca = data; | |
1297 | int slot; | |
1298 | ||
1299 | dprintk("%s\n", __func__); | |
1300 | ||
1301 | /* choose the correct initial delay */ | |
1302 | dvb_ca_en50221_thread_update_delay(ca); | |
1303 | ||
1304 | /* main loop */ | |
1305 | while (!kthread_should_stop()) { | |
1306 | /* sleep for a bit */ | |
1307 | if (!ca->wakeup) { | |
1308 | set_current_state(TASK_INTERRUPTIBLE); | |
1309 | schedule_timeout(ca->delay); | |
1310 | if (kthread_should_stop()) | |
1311 | return 0; | |
1312 | } | |
1313 | ca->wakeup = 0; | |
1314 | ||
1315 | /* go through all the slots processing them */ | |
1316 | for (slot = 0; slot < ca->slot_count; slot++) | |
1317 | dvb_ca_en50221_thread_state_machine(ca, slot); | |
1da177e4 LT |
1318 | } |
1319 | ||
1da177e4 LT |
1320 | return 0; |
1321 | } | |
1322 | ||
96375b7a | 1323 | /* ************************************************************************** */ |
1da177e4 LT |
1324 | /* EN50221 IO interface functions */ |
1325 | ||
1326 | /** | |
1327 | * Real ioctl implementation. | |
1328 | * NOTE: CA_SEND_MSG/CA_GET_MSG ioctls have userspace buffers passed to them. | |
1329 | * | |
fbefb1a8 MCC |
1330 | * @file: File concerned. |
1331 | * @cmd: IOCTL command. | |
46e42a30 | 1332 | * @parg: Associated argument. |
1da177e4 | 1333 | * |
46e42a30 | 1334 | * return: 0 on success, <0 on error. |
1da177e4 | 1335 | */ |
16ef8def | 1336 | static int dvb_ca_en50221_io_do_ioctl(struct file *file, |
1da177e4 LT |
1337 | unsigned int cmd, void *parg) |
1338 | { | |
0c53c70f JS |
1339 | struct dvb_device *dvbdev = file->private_data; |
1340 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1341 | int err = 0; |
1342 | int slot; | |
1343 | ||
46b4f7c1 | 1344 | dprintk("%s\n", __func__); |
1da177e4 | 1345 | |
30ad64b8 NS |
1346 | if (mutex_lock_interruptible(&ca->ioctl_mutex)) |
1347 | return -ERESTARTSYS; | |
1348 | ||
1da177e4 LT |
1349 | switch (cmd) { |
1350 | case CA_RESET: | |
1351 | for (slot = 0; slot < ca->slot_count; slot++) { | |
a75aa90c JJ |
1352 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1353 | ||
1354 | mutex_lock(&sl->slot_lock); | |
1355 | if (sl->slot_state != DVB_CA_SLOTSTATE_NONE) { | |
1da177e4 LT |
1356 | dvb_ca_en50221_slot_shutdown(ca, slot); |
1357 | if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE) | |
1358 | dvb_ca_en50221_camchange_irq(ca->pub, | |
1359 | slot, | |
1360 | DVB_CA_EN50221_CAMCHANGE_INSERTED); | |
1361 | } | |
a75aa90c | 1362 | mutex_unlock(&sl->slot_lock); |
1da177e4 LT |
1363 | } |
1364 | ca->next_read_slot = 0; | |
1365 | dvb_ca_en50221_thread_wakeup(ca); | |
1366 | break; | |
1367 | ||
1368 | case CA_GET_CAP: { | |
0c53c70f | 1369 | struct ca_caps *caps = parg; |
1da177e4 LT |
1370 | |
1371 | caps->slot_num = ca->slot_count; | |
1372 | caps->slot_type = CA_CI_LINK; | |
1373 | caps->descr_num = 0; | |
1374 | caps->descr_type = 0; | |
1375 | break; | |
1376 | } | |
1377 | ||
1378 | case CA_GET_SLOT_INFO: { | |
0c53c70f | 1379 | struct ca_slot_info *info = parg; |
a75aa90c | 1380 | struct dvb_ca_slot *sl; |
1da177e4 | 1381 | |
a75aa90c | 1382 | slot = info->num; |
6706fe55 | 1383 | if ((slot >= ca->slot_count) || (slot < 0)) { |
c4fe29a3 DC |
1384 | err = -EINVAL; |
1385 | goto out_unlock; | |
1386 | } | |
1da177e4 LT |
1387 | |
1388 | info->type = CA_CI_LINK; | |
1389 | info->flags = 0; | |
a75aa90c JJ |
1390 | sl = &ca->slot_info[slot]; |
1391 | if ((sl->slot_state != DVB_CA_SLOTSTATE_NONE) && | |
1392 | (sl->slot_state != DVB_CA_SLOTSTATE_INVALID)) { | |
1da177e4 LT |
1393 | info->flags = CA_CI_MODULE_PRESENT; |
1394 | } | |
a75aa90c | 1395 | if (sl->slot_state == DVB_CA_SLOTSTATE_RUNNING) |
1da177e4 | 1396 | info->flags |= CA_CI_MODULE_READY; |
1da177e4 LT |
1397 | break; |
1398 | } | |
1399 | ||
1400 | default: | |
1401 | err = -EINVAL; | |
1402 | break; | |
1403 | } | |
1404 | ||
c4fe29a3 | 1405 | out_unlock: |
30ad64b8 | 1406 | mutex_unlock(&ca->ioctl_mutex); |
1da177e4 LT |
1407 | return err; |
1408 | } | |
1409 | ||
1da177e4 LT |
1410 | /** |
1411 | * Wrapper for ioctl implementation. | |
1412 | * | |
fbefb1a8 MCC |
1413 | * @file: File concerned. |
1414 | * @cmd: IOCTL command. | |
1415 | * @arg: Associated argument. | |
1da177e4 | 1416 | * |
46e42a30 | 1417 | * return: 0 on success, <0 on error. |
1da177e4 | 1418 | */ |
16ef8def AB |
1419 | static long dvb_ca_en50221_io_ioctl(struct file *file, |
1420 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1421 | { |
72024f1e | 1422 | return dvb_usercopy(file, cmd, arg, dvb_ca_en50221_io_do_ioctl); |
1da177e4 LT |
1423 | } |
1424 | ||
1da177e4 LT |
1425 | /** |
1426 | * Implementation of write() syscall. | |
1427 | * | |
fbefb1a8 MCC |
1428 | * @file: File structure. |
1429 | * @buf: Source buffer. | |
1430 | * @count: Size of source buffer. | |
1431 | * @ppos: Position in file (ignored). | |
1da177e4 | 1432 | * |
46e42a30 | 1433 | * return: Number of bytes read, or <0 on error. |
1da177e4 LT |
1434 | */ |
1435 | static ssize_t dvb_ca_en50221_io_write(struct file *file, | |
8ec6107a JJ |
1436 | const char __user *buf, size_t count, |
1437 | loff_t *ppos) | |
1da177e4 | 1438 | { |
0c53c70f JS |
1439 | struct dvb_device *dvbdev = file->private_data; |
1440 | struct dvb_ca_private *ca = dvbdev->priv; | |
a75aa90c | 1441 | struct dvb_ca_slot *sl; |
1da177e4 LT |
1442 | u8 slot, connection_id; |
1443 | int status; | |
260f8d7c | 1444 | u8 fragbuf[HOST_LINK_BUF_SIZE]; |
1da177e4 LT |
1445 | int fragpos = 0; |
1446 | int fraglen; | |
1447 | unsigned long timeout; | |
1448 | int written; | |
1449 | ||
46b4f7c1 | 1450 | dprintk("%s\n", __func__); |
1da177e4 | 1451 | |
96375b7a JJ |
1452 | /* |
1453 | * Incoming packet has a 2 byte header. | |
1454 | * hdr[0] = slot_id, hdr[1] = connection_id | |
1455 | */ | |
1da177e4 LT |
1456 | if (count < 2) |
1457 | return -EINVAL; | |
1458 | ||
1459 | /* extract slot & connection id */ | |
1460 | if (copy_from_user(&slot, buf, 1)) | |
1461 | return -EFAULT; | |
1462 | if (copy_from_user(&connection_id, buf + 1, 1)) | |
1463 | return -EFAULT; | |
1464 | buf += 2; | |
1465 | count -= 2; | |
a24e6348 CIK |
1466 | |
1467 | if (slot >= ca->slot_count) | |
1468 | return -EINVAL; | |
4f5ab5d7 | 1469 | slot = array_index_nospec(slot, ca->slot_count); |
a75aa90c | 1470 | sl = &ca->slot_info[slot]; |
1da177e4 LT |
1471 | |
1472 | /* check if the slot is actually running */ | |
a75aa90c | 1473 | if (sl->slot_state != DVB_CA_SLOTSTATE_RUNNING) |
1da177e4 LT |
1474 | return -EINVAL; |
1475 | ||
1476 | /* fragment the packets & store in the buffer */ | |
1477 | while (fragpos < count) { | |
a75aa90c | 1478 | fraglen = sl->link_buf_size - 2; |
624f0c18 MCC |
1479 | if (fraglen < 0) |
1480 | break; | |
1481 | if (fraglen > HOST_LINK_BUF_SIZE - 2) | |
1482 | fraglen = HOST_LINK_BUF_SIZE - 2; | |
1da177e4 LT |
1483 | if ((count - fragpos) < fraglen) |
1484 | fraglen = count - fragpos; | |
1485 | ||
1486 | fragbuf[0] = connection_id; | |
1487 | fragbuf[1] = ((fragpos + fraglen) < count) ? 0x80 : 0x00; | |
e252984c DC |
1488 | status = copy_from_user(fragbuf + 2, buf + fragpos, fraglen); |
1489 | if (status) { | |
1490 | status = -EFAULT; | |
1da177e4 | 1491 | goto exit; |
e252984c | 1492 | } |
1da177e4 LT |
1493 | |
1494 | timeout = jiffies + HZ / 2; | |
1495 | written = 0; | |
1496 | while (!time_after(jiffies, timeout)) { | |
96375b7a JJ |
1497 | /* |
1498 | * check the CAM hasn't been removed/reset in the | |
1499 | * meantime | |
1500 | */ | |
a75aa90c | 1501 | if (sl->slot_state != DVB_CA_SLOTSTATE_RUNNING) { |
1da177e4 LT |
1502 | status = -EIO; |
1503 | goto exit; | |
1504 | } | |
1505 | ||
a75aa90c | 1506 | mutex_lock(&sl->slot_lock); |
96375b7a JJ |
1507 | status = dvb_ca_en50221_write_data(ca, slot, fragbuf, |
1508 | fraglen + 2); | |
a75aa90c | 1509 | mutex_unlock(&sl->slot_lock); |
1da177e4 LT |
1510 | if (status == (fraglen + 2)) { |
1511 | written = 1; | |
1512 | break; | |
1513 | } | |
1514 | if (status != -EAGAIN) | |
1515 | goto exit; | |
1516 | ||
b9af29e1 | 1517 | usleep_range(1000, 1100); |
1da177e4 LT |
1518 | } |
1519 | if (!written) { | |
1520 | status = -EIO; | |
1521 | goto exit; | |
1522 | } | |
1523 | ||
1524 | fragpos += fraglen; | |
1525 | } | |
1526 | status = count + 2; | |
1527 | ||
1528 | exit: | |
1529 | return status; | |
1530 | } | |
1531 | ||
46e42a30 | 1532 | /* |
1da177e4 LT |
1533 | * Condition for waking up in dvb_ca_en50221_io_read_condition |
1534 | */ | |
ded92846 AQ |
1535 | static int dvb_ca_en50221_io_read_condition(struct dvb_ca_private *ca, |
1536 | int *result, int *_slot) | |
1da177e4 LT |
1537 | { |
1538 | int slot; | |
1539 | int slot_count = 0; | |
1540 | int idx; | |
ded92846 | 1541 | size_t fraglen; |
1da177e4 LT |
1542 | int connection_id = -1; |
1543 | int found = 0; | |
1544 | u8 hdr[2]; | |
1545 | ||
1546 | slot = ca->next_read_slot; | |
1547 | while ((slot_count < ca->slot_count) && (!found)) { | |
a75aa90c JJ |
1548 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1549 | ||
1550 | if (sl->slot_state != DVB_CA_SLOTSTATE_RUNNING) | |
1da177e4 LT |
1551 | goto nextslot; |
1552 | ||
a75aa90c | 1553 | if (!sl->rx_buffer.data) |
1da177e4 | 1554 | return 0; |
1da177e4 | 1555 | |
a75aa90c | 1556 | idx = dvb_ringbuffer_pkt_next(&sl->rx_buffer, -1, &fraglen); |
1da177e4 | 1557 | while (idx != -1) { |
a75aa90c | 1558 | dvb_ringbuffer_pkt_read(&sl->rx_buffer, idx, 0, hdr, 2); |
1da177e4 LT |
1559 | if (connection_id == -1) |
1560 | connection_id = hdr[0]; | |
96375b7a JJ |
1561 | if ((hdr[0] == connection_id) && |
1562 | ((hdr[1] & 0x80) == 0)) { | |
1da177e4 LT |
1563 | *_slot = slot; |
1564 | found = 1; | |
1565 | break; | |
1566 | } | |
1567 | ||
a75aa90c JJ |
1568 | idx = dvb_ringbuffer_pkt_next(&sl->rx_buffer, idx, |
1569 | &fraglen); | |
1da177e4 LT |
1570 | } |
1571 | ||
ded92846 | 1572 | nextslot: |
1da177e4 LT |
1573 | slot = (slot + 1) % ca->slot_count; |
1574 | slot_count++; | |
1575 | } | |
1576 | ||
1577 | ca->next_read_slot = slot; | |
1578 | return found; | |
1579 | } | |
1580 | ||
1da177e4 LT |
1581 | /** |
1582 | * Implementation of read() syscall. | |
1583 | * | |
fbefb1a8 MCC |
1584 | * @file: File structure. |
1585 | * @buf: Destination buffer. | |
1586 | * @count: Size of destination buffer. | |
1587 | * @ppos: Position in file (ignored). | |
1da177e4 | 1588 | * |
46e42a30 | 1589 | * return: Number of bytes read, or <0 on error. |
1da177e4 | 1590 | */ |
8ec6107a JJ |
1591 | static ssize_t dvb_ca_en50221_io_read(struct file *file, char __user *buf, |
1592 | size_t count, loff_t *ppos) | |
1da177e4 | 1593 | { |
0c53c70f JS |
1594 | struct dvb_device *dvbdev = file->private_data; |
1595 | struct dvb_ca_private *ca = dvbdev->priv; | |
a75aa90c | 1596 | struct dvb_ca_slot *sl; |
1da177e4 LT |
1597 | int status; |
1598 | int result = 0; | |
1599 | u8 hdr[2]; | |
1600 | int slot; | |
1601 | int connection_id = -1; | |
1602 | size_t idx, idx2; | |
1603 | int last_fragment = 0; | |
1604 | size_t fraglen; | |
1605 | int pktlen; | |
1606 | int dispose = 0; | |
1607 | ||
46b4f7c1 | 1608 | dprintk("%s\n", __func__); |
1da177e4 | 1609 | |
96375b7a JJ |
1610 | /* |
1611 | * Outgoing packet has a 2 byte header. | |
1612 | * hdr[0] = slot_id, hdr[1] = connection_id | |
1613 | */ | |
1da177e4 LT |
1614 | if (count < 2) |
1615 | return -EINVAL; | |
1616 | ||
1617 | /* wait for some data */ | |
bacba9e5 JJ |
1618 | status = dvb_ca_en50221_io_read_condition(ca, &result, &slot); |
1619 | if (status == 0) { | |
1da177e4 LT |
1620 | /* if we're in nonblocking mode, exit immediately */ |
1621 | if (file->f_flags & O_NONBLOCK) | |
1622 | return -EWOULDBLOCK; | |
1623 | ||
1624 | /* wait for some data */ | |
1625 | status = wait_event_interruptible(ca->wait_queue, | |
1626 | dvb_ca_en50221_io_read_condition | |
1627 | (ca, &result, &slot)); | |
1628 | } | |
1629 | if ((status < 0) || (result < 0)) { | |
1630 | if (result) | |
1631 | return result; | |
1632 | return status; | |
1633 | } | |
1634 | ||
a75aa90c JJ |
1635 | sl = &ca->slot_info[slot]; |
1636 | idx = dvb_ringbuffer_pkt_next(&sl->rx_buffer, -1, &fraglen); | |
1da177e4 LT |
1637 | pktlen = 2; |
1638 | do { | |
1639 | if (idx == -1) { | |
b3ad24d2 MCC |
1640 | pr_err("dvb_ca adapter %d: BUG: read packet ended before last_fragment encountered\n", |
1641 | ca->dvbdev->adapter->num); | |
1da177e4 LT |
1642 | status = -EIO; |
1643 | goto exit; | |
1644 | } | |
1645 | ||
a75aa90c | 1646 | dvb_ringbuffer_pkt_read(&sl->rx_buffer, idx, 0, hdr, 2); |
1da177e4 LT |
1647 | if (connection_id == -1) |
1648 | connection_id = hdr[0]; | |
1649 | if (hdr[0] == connection_id) { | |
1650 | if (pktlen < count) { | |
7bd8cc8f | 1651 | if ((pktlen + fraglen - 2) > count) |
1da177e4 | 1652 | fraglen = count - pktlen; |
7bd8cc8f | 1653 | else |
1da177e4 | 1654 | fraglen -= 2; |
1da177e4 | 1655 | |
a75aa90c JJ |
1656 | status = |
1657 | dvb_ringbuffer_pkt_read_user(&sl->rx_buffer, | |
1658 | idx, 2, | |
1659 | buf + pktlen, | |
1660 | fraglen); | |
1661 | if (status < 0) | |
1da177e4 | 1662 | goto exit; |
a75aa90c | 1663 | |
1da177e4 LT |
1664 | pktlen += fraglen; |
1665 | } | |
1666 | ||
1667 | if ((hdr[1] & 0x80) == 0) | |
1668 | last_fragment = 1; | |
1669 | dispose = 1; | |
1670 | } | |
1671 | ||
a75aa90c | 1672 | idx2 = dvb_ringbuffer_pkt_next(&sl->rx_buffer, idx, &fraglen); |
1da177e4 | 1673 | if (dispose) |
a75aa90c | 1674 | dvb_ringbuffer_pkt_dispose(&sl->rx_buffer, idx); |
1da177e4 LT |
1675 | idx = idx2; |
1676 | dispose = 0; | |
1677 | } while (!last_fragment); | |
1678 | ||
1679 | hdr[0] = slot; | |
1680 | hdr[1] = connection_id; | |
e252984c DC |
1681 | status = copy_to_user(buf, hdr, 2); |
1682 | if (status) { | |
1683 | status = -EFAULT; | |
1da177e4 | 1684 | goto exit; |
e252984c | 1685 | } |
1da177e4 LT |
1686 | status = pktlen; |
1687 | ||
ded92846 | 1688 | exit: |
1da177e4 LT |
1689 | return status; |
1690 | } | |
1691 | ||
1da177e4 LT |
1692 | /** |
1693 | * Implementation of file open syscall. | |
1694 | * | |
fbefb1a8 MCC |
1695 | * @inode: Inode concerned. |
1696 | * @file: File concerned. | |
1da177e4 | 1697 | * |
46e42a30 | 1698 | * return: 0 on success, <0 on failure. |
1da177e4 LT |
1699 | */ |
1700 | static int dvb_ca_en50221_io_open(struct inode *inode, struct file *file) | |
1701 | { | |
0c53c70f JS |
1702 | struct dvb_device *dvbdev = file->private_data; |
1703 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1704 | int err; |
1705 | int i; | |
1706 | ||
46b4f7c1 | 1707 | dprintk("%s\n", __func__); |
1da177e4 LT |
1708 | |
1709 | if (!try_module_get(ca->pub->owner)) | |
1710 | return -EIO; | |
1711 | ||
1712 | err = dvb_generic_open(inode, file); | |
226835d7 MS |
1713 | if (err < 0) { |
1714 | module_put(ca->pub->owner); | |
1da177e4 | 1715 | return err; |
226835d7 | 1716 | } |
1da177e4 LT |
1717 | |
1718 | for (i = 0; i < ca->slot_count; i++) { | |
a75aa90c | 1719 | struct dvb_ca_slot *sl = &ca->slot_info[i]; |
1da177e4 | 1720 | |
a75aa90c JJ |
1721 | if (sl->slot_state == DVB_CA_SLOTSTATE_RUNNING) { |
1722 | if (!sl->rx_buffer.data) { | |
a1ca23d1 JJ |
1723 | /* |
1724 | * it is safe to call this here without locks | |
1725 | * because ca->open == 0. Data is not read in | |
1726 | * this case | |
1727 | */ | |
a75aa90c | 1728 | dvb_ringbuffer_flush(&sl->rx_buffer); |
1da177e4 | 1729 | } |
1da177e4 LT |
1730 | } |
1731 | } | |
1732 | ||
1733 | ca->open = 1; | |
1734 | dvb_ca_en50221_thread_update_delay(ca); | |
1735 | dvb_ca_en50221_thread_wakeup(ca); | |
1736 | ||
da677fe1 MK |
1737 | dvb_ca_private_get(ca); |
1738 | ||
1da177e4 LT |
1739 | return 0; |
1740 | } | |
1741 | ||
1da177e4 LT |
1742 | /** |
1743 | * Implementation of file close syscall. | |
1744 | * | |
fbefb1a8 MCC |
1745 | * @inode: Inode concerned. |
1746 | * @file: File concerned. | |
1da177e4 | 1747 | * |
46e42a30 | 1748 | * return: 0 on success, <0 on failure. |
1da177e4 LT |
1749 | */ |
1750 | static int dvb_ca_en50221_io_release(struct inode *inode, struct file *file) | |
1751 | { | |
0c53c70f JS |
1752 | struct dvb_device *dvbdev = file->private_data; |
1753 | struct dvb_ca_private *ca = dvbdev->priv; | |
0c12c1bf | 1754 | int err; |
1da177e4 | 1755 | |
46b4f7c1 | 1756 | dprintk("%s\n", __func__); |
1da177e4 LT |
1757 | |
1758 | /* mark the CA device as closed */ | |
1759 | ca->open = 0; | |
1760 | dvb_ca_en50221_thread_update_delay(ca); | |
1761 | ||
1762 | err = dvb_generic_release(inode, file); | |
1763 | ||
1764 | module_put(ca->pub->owner); | |
1765 | ||
da677fe1 MK |
1766 | dvb_ca_private_put(ca); |
1767 | ||
0c12c1bf | 1768 | return err; |
1da177e4 LT |
1769 | } |
1770 | ||
1da177e4 LT |
1771 | /** |
1772 | * Implementation of poll() syscall. | |
1773 | * | |
fbefb1a8 MCC |
1774 | * @file: File concerned. |
1775 | * @wait: poll wait table. | |
1da177e4 | 1776 | * |
46e42a30 | 1777 | * return: Standard poll mask. |
1da177e4 | 1778 | */ |
c23e0cb8 | 1779 | static __poll_t dvb_ca_en50221_io_poll(struct file *file, poll_table *wait) |
1da177e4 | 1780 | { |
0c53c70f JS |
1781 | struct dvb_device *dvbdev = file->private_data; |
1782 | struct dvb_ca_private *ca = dvbdev->priv; | |
c23e0cb8 | 1783 | __poll_t mask = 0; |
1da177e4 LT |
1784 | int slot; |
1785 | int result = 0; | |
1786 | ||
46b4f7c1 | 1787 | dprintk("%s\n", __func__); |
1da177e4 | 1788 | |
c6f5c7c2 HV |
1789 | poll_wait(file, &ca->wait_queue, wait); |
1790 | ||
7bd8cc8f | 1791 | if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) |
a9a08845 | 1792 | mask |= EPOLLIN; |
1da177e4 LT |
1793 | |
1794 | /* if there is something, return now */ | |
1795 | if (mask) | |
1796 | return mask; | |
1797 | ||
7bd8cc8f | 1798 | if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) |
a9a08845 | 1799 | mask |= EPOLLIN; |
1da177e4 LT |
1800 | |
1801 | return mask; | |
1802 | } | |
1da177e4 | 1803 | |
784e29d2 | 1804 | static const struct file_operations dvb_ca_fops = { |
1da177e4 LT |
1805 | .owner = THIS_MODULE, |
1806 | .read = dvb_ca_en50221_io_read, | |
1807 | .write = dvb_ca_en50221_io_write, | |
16ef8def | 1808 | .unlocked_ioctl = dvb_ca_en50221_io_ioctl, |
1da177e4 LT |
1809 | .open = dvb_ca_en50221_io_open, |
1810 | .release = dvb_ca_en50221_io_release, | |
1811 | .poll = dvb_ca_en50221_io_poll, | |
6038f373 | 1812 | .llseek = noop_llseek, |
1da177e4 LT |
1813 | }; |
1814 | ||
738a1b1e | 1815 | static const struct dvb_device dvbdev_ca = { |
1da177e4 LT |
1816 | .priv = NULL, |
1817 | .users = 1, | |
1818 | .readers = 1, | |
1819 | .writers = 1, | |
738a1b1e | 1820 | #if defined(CONFIG_MEDIA_CONTROLLER_DVB) |
e4fd3bc5 | 1821 | .name = "dvb-ca-en50221", |
738a1b1e | 1822 | #endif |
1da177e4 LT |
1823 | .fops = &dvb_ca_fops, |
1824 | }; | |
1825 | ||
96375b7a | 1826 | /* ************************************************************************** */ |
1da177e4 LT |
1827 | /* Initialisation/shutdown functions */ |
1828 | ||
1da177e4 LT |
1829 | /** |
1830 | * Initialise a new DVB CA EN50221 interface device. | |
1831 | * | |
fbefb1a8 | 1832 | * @dvb_adapter: DVB adapter to attach the new CA device to. |
46e42a30 | 1833 | * @pubca: The dvb_ca instance. |
fbefb1a8 MCC |
1834 | * @flags: Flags describing the CA device (DVB_CA_FLAG_*). |
1835 | * @slot_count: Number of slots supported. | |
1da177e4 | 1836 | * |
46e42a30 | 1837 | * return: 0 on success, nonzero on failure |
1da177e4 LT |
1838 | */ |
1839 | int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter, | |
1840 | struct dvb_ca_en50221 *pubca, int flags, int slot_count) | |
1841 | { | |
1842 | int ret; | |
1843 | struct dvb_ca_private *ca = NULL; | |
1844 | int i; | |
1845 | ||
46b4f7c1 | 1846 | dprintk("%s\n", __func__); |
1da177e4 LT |
1847 | |
1848 | if (slot_count < 1) | |
1849 | return -EINVAL; | |
1850 | ||
1851 | /* initialise the system data */ | |
bacba9e5 JJ |
1852 | ca = kzalloc(sizeof(*ca), GFP_KERNEL); |
1853 | if (!ca) { | |
1da177e4 | 1854 | ret = -ENOMEM; |
a2bbf5d0 | 1855 | goto exit; |
1da177e4 | 1856 | } |
da677fe1 | 1857 | kref_init(&ca->refcount); |
1da177e4 LT |
1858 | ca->pub = pubca; |
1859 | ca->flags = flags; | |
1860 | ca->slot_count = slot_count; | |
bacba9e5 JJ |
1861 | ca->slot_info = kcalloc(slot_count, sizeof(struct dvb_ca_slot), |
1862 | GFP_KERNEL); | |
1863 | if (!ca->slot_info) { | |
1da177e4 | 1864 | ret = -ENOMEM; |
a2bbf5d0 | 1865 | goto free_ca; |
1da177e4 | 1866 | } |
1da177e4 | 1867 | init_waitqueue_head(&ca->wait_queue); |
1da177e4 LT |
1868 | ca->open = 0; |
1869 | ca->wakeup = 0; | |
1870 | ca->next_read_slot = 0; | |
1871 | pubca->private = ca; | |
1872 | ||
1873 | /* register the DVB device */ | |
96375b7a JJ |
1874 | ret = dvb_register_device(dvb_adapter, &ca->dvbdev, &dvbdev_ca, ca, |
1875 | DVB_DEVICE_CA, 0); | |
1da177e4 | 1876 | if (ret) |
a2bbf5d0 | 1877 | goto free_slot_info; |
1da177e4 LT |
1878 | |
1879 | /* now initialise each slot */ | |
1880 | for (i = 0; i < slot_count; i++) { | |
a75aa90c JJ |
1881 | struct dvb_ca_slot *sl = &ca->slot_info[i]; |
1882 | ||
1883 | memset(sl, 0, sizeof(struct dvb_ca_slot)); | |
1884 | sl->slot_state = DVB_CA_SLOTSTATE_NONE; | |
1885 | atomic_set(&sl->camchange_count, 0); | |
1886 | sl->camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; | |
1887 | mutex_init(&sl->slot_lock); | |
1da177e4 LT |
1888 | } |
1889 | ||
30ad64b8 NS |
1890 | mutex_init(&ca->ioctl_mutex); |
1891 | ||
1da177e4 LT |
1892 | if (signal_pending(current)) { |
1893 | ret = -EINTR; | |
a2bbf5d0 | 1894 | goto unregister_device; |
1da177e4 LT |
1895 | } |
1896 | mb(); | |
1897 | ||
1898 | /* create a kthread for monitoring this CA device */ | |
9320874a CH |
1899 | ca->thread = kthread_run(dvb_ca_en50221_thread, ca, "kdvb-ca-%i:%i", |
1900 | ca->dvbdev->adapter->num, ca->dvbdev->id); | |
1901 | if (IS_ERR(ca->thread)) { | |
1902 | ret = PTR_ERR(ca->thread); | |
b3ad24d2 MCC |
1903 | pr_err("dvb_ca_init: failed to start kernel_thread (%d)\n", |
1904 | ret); | |
a2bbf5d0 | 1905 | goto unregister_device; |
1da177e4 | 1906 | } |
1da177e4 LT |
1907 | return 0; |
1908 | ||
a2bbf5d0 ME |
1909 | unregister_device: |
1910 | dvb_unregister_device(ca->dvbdev); | |
1911 | free_slot_info: | |
1912 | kfree(ca->slot_info); | |
1913 | free_ca: | |
1914 | kfree(ca); | |
1915 | exit: | |
1da177e4 LT |
1916 | pubca->private = NULL; |
1917 | return ret; | |
1918 | } | |
82ec19e4 | 1919 | EXPORT_SYMBOL(dvb_ca_en50221_init); |
1da177e4 | 1920 | |
1da177e4 LT |
1921 | /** |
1922 | * Release a DVB CA EN50221 interface device. | |
1923 | * | |
46e42a30 | 1924 | * @pubca: The associated dvb_ca instance. |
1da177e4 LT |
1925 | */ |
1926 | void dvb_ca_en50221_release(struct dvb_ca_en50221 *pubca) | |
1927 | { | |
0c53c70f | 1928 | struct dvb_ca_private *ca = pubca->private; |
1da177e4 LT |
1929 | int i; |
1930 | ||
46b4f7c1 | 1931 | dprintk("%s\n", __func__); |
1da177e4 LT |
1932 | |
1933 | /* shutdown the thread if there was one */ | |
9320874a | 1934 | kthread_stop(ca->thread); |
1da177e4 | 1935 | |
7bd8cc8f | 1936 | for (i = 0; i < ca->slot_count; i++) |
1da177e4 | 1937 | dvb_ca_en50221_slot_shutdown(ca, i); |
7bd8cc8f | 1938 | |
4d5030b6 | 1939 | dvb_remove_device(ca->dvbdev); |
da677fe1 | 1940 | dvb_ca_private_put(ca); |
1da177e4 LT |
1941 | pubca->private = NULL; |
1942 | } | |
82ec19e4 | 1943 | EXPORT_SYMBOL(dvb_ca_en50221_release); |