Commit | Line | Data |
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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; | |
280a8ab8 HK |
154 | |
155 | /* A mutex used when a device is disconnected */ | |
156 | struct mutex remove_mutex; | |
157 | ||
158 | /* Whether the device is disconnected */ | |
159 | int exit; | |
1da177e4 LT |
160 | }; |
161 | ||
bd3df3c5 MK |
162 | static void dvb_ca_private_free(struct dvb_ca_private *ca) |
163 | { | |
164 | unsigned int i; | |
165 | ||
0fc044b2 | 166 | dvb_device_put(ca->dvbdev); |
bd3df3c5 MK |
167 | for (i = 0; i < ca->slot_count; i++) |
168 | vfree(ca->slot_info[i].rx_buffer.data); | |
169 | ||
170 | kfree(ca->slot_info); | |
171 | kfree(ca); | |
172 | } | |
173 | ||
da677fe1 MK |
174 | static void dvb_ca_private_release(struct kref *ref) |
175 | { | |
fbabbddd JJ |
176 | struct dvb_ca_private *ca; |
177 | ||
178 | ca = container_of(ref, struct dvb_ca_private, refcount); | |
da677fe1 MK |
179 | dvb_ca_private_free(ca); |
180 | } | |
181 | ||
182 | static void dvb_ca_private_get(struct dvb_ca_private *ca) | |
183 | { | |
184 | kref_get(&ca->refcount); | |
185 | } | |
186 | ||
187 | static void dvb_ca_private_put(struct dvb_ca_private *ca) | |
188 | { | |
189 | kref_put(&ca->refcount, dvb_ca_private_release); | |
190 | } | |
191 | ||
1da177e4 | 192 | static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca); |
8ec6107a JJ |
193 | static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, |
194 | u8 *ebuf, int ecount); | |
195 | static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, | |
a4315e5b | 196 | u8 *ebuf, int ecount, int size_write_flag); |
1da177e4 | 197 | |
1da177e4 | 198 | /** |
a4184b4f | 199 | * findstr - Safely find needle in haystack. |
1da177e4 | 200 | * |
fbefb1a8 MCC |
201 | * @haystack: Buffer to look in. |
202 | * @hlen: Number of bytes in haystack. | |
203 | * @needle: Buffer to find. | |
204 | * @nlen: Number of bytes in needle. | |
46e42a30 | 205 | * return: Pointer into haystack needle was found at, or NULL if not found. |
1da177e4 | 206 | */ |
8ec6107a | 207 | static char *findstr(char *haystack, int hlen, char *needle, int nlen) |
1da177e4 LT |
208 | { |
209 | int i; | |
210 | ||
211 | if (hlen < nlen) | |
212 | return NULL; | |
213 | ||
214 | for (i = 0; i <= hlen - nlen; i++) { | |
215 | if (!strncmp(haystack + i, needle, nlen)) | |
216 | return haystack + i; | |
217 | } | |
218 | ||
219 | return NULL; | |
220 | } | |
221 | ||
96375b7a | 222 | /* ************************************************************************** */ |
1da177e4 LT |
223 | /* EN50221 physical interface functions */ |
224 | ||
46e42a30 | 225 | /* |
fbefb1a8 | 226 | * dvb_ca_en50221_check_camstatus - Check CAM status. |
1da177e4 LT |
227 | */ |
228 | static int dvb_ca_en50221_check_camstatus(struct dvb_ca_private *ca, int slot) | |
229 | { | |
a75aa90c | 230 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
231 | int slot_status; |
232 | int cam_present_now; | |
233 | int cam_changed; | |
234 | ||
235 | /* IRQ mode */ | |
7bd8cc8f | 236 | if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE) |
a75aa90c | 237 | return (atomic_read(&sl->camchange_count) != 0); |
1da177e4 LT |
238 | |
239 | /* poll mode */ | |
240 | slot_status = ca->pub->poll_slot_status(ca->pub, slot, ca->open); | |
241 | ||
242 | cam_present_now = (slot_status & DVB_CA_EN50221_POLL_CAM_PRESENT) ? 1 : 0; | |
243 | cam_changed = (slot_status & DVB_CA_EN50221_POLL_CAM_CHANGED) ? 1 : 0; | |
244 | if (!cam_changed) { | |
a75aa90c JJ |
245 | int cam_present_old = (sl->slot_state != DVB_CA_SLOTSTATE_NONE); |
246 | ||
1da177e4 LT |
247 | cam_changed = (cam_present_now != cam_present_old); |
248 | } | |
249 | ||
250 | if (cam_changed) { | |
7bd8cc8f | 251 | if (!cam_present_now) |
a75aa90c | 252 | sl->camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; |
7bd8cc8f | 253 | else |
a75aa90c | 254 | sl->camchange_type = DVB_CA_EN50221_CAMCHANGE_INSERTED; |
a75aa90c | 255 | atomic_set(&sl->camchange_count, 1); |
1da177e4 | 256 | } else { |
a75aa90c | 257 | if ((sl->slot_state == DVB_CA_SLOTSTATE_WAITREADY) && |
1da177e4 | 258 | (slot_status & DVB_CA_EN50221_POLL_CAM_READY)) { |
224457a9 | 259 | /* move to validate state if reset is completed */ |
a75aa90c | 260 | sl->slot_state = DVB_CA_SLOTSTATE_VALIDATE; |
1da177e4 LT |
261 | } |
262 | } | |
263 | ||
264 | return cam_changed; | |
265 | } | |
266 | ||
1da177e4 | 267 | /** |
fbefb1a8 MCC |
268 | * dvb_ca_en50221_wait_if_status - Wait for flags to become set on the STATUS |
269 | * register on a CAM interface, checking for errors and timeout. | |
1da177e4 | 270 | * |
fbefb1a8 MCC |
271 | * @ca: CA instance. |
272 | * @slot: Slot on interface. | |
273 | * @waitfor: Flags to wait for. | |
46e42a30 | 274 | * @timeout_hz: Timeout in milliseconds. |
1da177e4 | 275 | * |
46e42a30 | 276 | * return: 0 on success, nonzero on error. |
1da177e4 LT |
277 | */ |
278 | static int dvb_ca_en50221_wait_if_status(struct dvb_ca_private *ca, int slot, | |
279 | u8 waitfor, int timeout_hz) | |
280 | { | |
281 | unsigned long timeout; | |
282 | unsigned long start; | |
283 | ||
46b4f7c1 | 284 | dprintk("%s\n", __func__); |
1da177e4 LT |
285 | |
286 | /* loop until timeout elapsed */ | |
287 | start = jiffies; | |
288 | timeout = jiffies + timeout_hz; | |
289 | while (1) { | |
fbabbddd JJ |
290 | int res; |
291 | ||
1da177e4 | 292 | /* read the status and check for error */ |
fbabbddd | 293 | res = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
1da177e4 LT |
294 | if (res < 0) |
295 | return -EIO; | |
296 | ||
297 | /* if we got the flags, it was successful! */ | |
298 | if (res & waitfor) { | |
b3ad24d2 MCC |
299 | dprintk("%s succeeded timeout:%lu\n", |
300 | __func__, jiffies - start); | |
1da177e4 LT |
301 | return 0; |
302 | } | |
303 | ||
304 | /* check for timeout */ | |
7bd8cc8f | 305 | if (time_after(jiffies, timeout)) |
1da177e4 | 306 | break; |
1da177e4 LT |
307 | |
308 | /* wait for a bit */ | |
b9af29e1 | 309 | usleep_range(1000, 1100); |
1da177e4 LT |
310 | } |
311 | ||
46b4f7c1 | 312 | dprintk("%s failed timeout:%lu\n", __func__, jiffies - start); |
1da177e4 LT |
313 | |
314 | /* if we get here, we've timed out */ | |
315 | return -ETIMEDOUT; | |
316 | } | |
317 | ||
1da177e4 | 318 | /** |
fbefb1a8 | 319 | * dvb_ca_en50221_link_init - Initialise the link layer connection to a CAM. |
1da177e4 | 320 | * |
fbefb1a8 MCC |
321 | * @ca: CA instance. |
322 | * @slot: Slot id. | |
1da177e4 | 323 | * |
46e42a30 | 324 | * return: 0 on success, nonzero on failure. |
1da177e4 LT |
325 | */ |
326 | static int dvb_ca_en50221_link_init(struct dvb_ca_private *ca, int slot) | |
327 | { | |
a75aa90c | 328 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
329 | int ret; |
330 | int buf_size; | |
331 | u8 buf[2]; | |
332 | ||
46b4f7c1 | 333 | dprintk("%s\n", __func__); |
1da177e4 LT |
334 | |
335 | /* we'll be determining these during this function */ | |
a75aa90c | 336 | sl->da_irq_supported = 0; |
1da177e4 | 337 | |
a1ca23d1 JJ |
338 | /* |
339 | * set the host link buffer size temporarily. it will be overwritten | |
340 | * with the real negotiated size later. | |
341 | */ | |
a75aa90c | 342 | sl->link_buf_size = 2; |
1da177e4 LT |
343 | |
344 | /* read the buffer size from the CAM */ | |
bacba9e5 JJ |
345 | ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, |
346 | IRQEN | CMDREG_SR); | |
347 | if (ret) | |
1da177e4 | 348 | return ret; |
5dbddc99 | 349 | ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_DA, HZ); |
bacba9e5 | 350 | if (ret) |
1da177e4 | 351 | return ret; |
bacba9e5 JJ |
352 | ret = dvb_ca_en50221_read_data(ca, slot, buf, 2); |
353 | if (ret != 2) | |
1da177e4 | 354 | return -EIO; |
bacba9e5 JJ |
355 | ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN); |
356 | if (ret) | |
1da177e4 LT |
357 | return ret; |
358 | ||
96375b7a JJ |
359 | /* |
360 | * store it, and choose the minimum of our buffer and the CAM's buffer | |
361 | * size | |
362 | */ | |
1da177e4 LT |
363 | buf_size = (buf[0] << 8) | buf[1]; |
364 | if (buf_size > HOST_LINK_BUF_SIZE) | |
365 | buf_size = HOST_LINK_BUF_SIZE; | |
a75aa90c | 366 | sl->link_buf_size = buf_size; |
1da177e4 LT |
367 | buf[0] = buf_size >> 8; |
368 | buf[1] = buf_size & 0xff; | |
369 | dprintk("Chosen link buffer size of %i\n", buf_size); | |
370 | ||
371 | /* write the buffer size to the CAM */ | |
bacba9e5 JJ |
372 | ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, |
373 | IRQEN | CMDREG_SW); | |
374 | if (ret) | |
1da177e4 | 375 | return ret; |
bacba9e5 JJ |
376 | ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_FR, HZ / 10); |
377 | if (ret) | |
1da177e4 | 378 | return ret; |
a4315e5b | 379 | ret = dvb_ca_en50221_write_data(ca, slot, buf, 2, CMDREG_SW); |
bacba9e5 | 380 | if (ret != 2) |
1da177e4 | 381 | return -EIO; |
bacba9e5 JJ |
382 | ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN); |
383 | if (ret) | |
1da177e4 LT |
384 | return ret; |
385 | ||
386 | /* success */ | |
387 | return 0; | |
388 | } | |
389 | ||
390 | /** | |
fbefb1a8 | 391 | * dvb_ca_en50221_read_tuple - Read a tuple from attribute memory. |
1da177e4 | 392 | * |
fbefb1a8 MCC |
393 | * @ca: CA instance. |
394 | * @slot: Slot id. | |
395 | * @address: Address to read from. Updated. | |
46e42a30 MCC |
396 | * @tuple_type: Tuple id byte. Updated. |
397 | * @tuple_length: Tuple length. Updated. | |
fbefb1a8 | 398 | * @tuple: Dest buffer for tuple (must be 256 bytes). Updated. |
1da177e4 | 399 | * |
46e42a30 | 400 | * return: 0 on success, nonzero on error. |
1da177e4 LT |
401 | */ |
402 | static int dvb_ca_en50221_read_tuple(struct dvb_ca_private *ca, int slot, | |
bacba9e5 JJ |
403 | int *address, int *tuple_type, |
404 | int *tuple_length, u8 *tuple) | |
1da177e4 LT |
405 | { |
406 | int i; | |
bacba9e5 JJ |
407 | int _tuple_type; |
408 | int _tuple_length; | |
1da177e4 LT |
409 | int _address = *address; |
410 | ||
411 | /* grab the next tuple length and type */ | |
bacba9e5 JJ |
412 | _tuple_type = ca->pub->read_attribute_mem(ca->pub, slot, _address); |
413 | if (_tuple_type < 0) | |
414 | return _tuple_type; | |
415 | if (_tuple_type == 0xff) { | |
416 | dprintk("END OF CHAIN TUPLE type:0x%x\n", _tuple_type); | |
1da177e4 | 417 | *address += 2; |
bacba9e5 JJ |
418 | *tuple_type = _tuple_type; |
419 | *tuple_length = 0; | |
1da177e4 LT |
420 | return 0; |
421 | } | |
bacba9e5 JJ |
422 | _tuple_length = ca->pub->read_attribute_mem(ca->pub, slot, |
423 | _address + 2); | |
424 | if (_tuple_length < 0) | |
425 | return _tuple_length; | |
1da177e4 LT |
426 | _address += 4; |
427 | ||
bacba9e5 | 428 | dprintk("TUPLE type:0x%x length:%i\n", _tuple_type, _tuple_length); |
1da177e4 LT |
429 | |
430 | /* read in the whole tuple */ | |
bacba9e5 | 431 | for (i = 0; i < _tuple_length; i++) { |
96375b7a JJ |
432 | tuple[i] = ca->pub->read_attribute_mem(ca->pub, slot, |
433 | _address + (i * 2)); | |
1da177e4 LT |
434 | dprintk(" 0x%02x: 0x%02x %c\n", |
435 | i, tuple[i] & 0xff, | |
436 | ((tuple[i] > 31) && (tuple[i] < 127)) ? tuple[i] : '.'); | |
437 | } | |
bacba9e5 | 438 | _address += (_tuple_length * 2); |
1da177e4 | 439 | |
224457a9 | 440 | /* success */ |
bacba9e5 JJ |
441 | *tuple_type = _tuple_type; |
442 | *tuple_length = _tuple_length; | |
1da177e4 LT |
443 | *address = _address; |
444 | return 0; | |
445 | } | |
446 | ||
1da177e4 | 447 | /** |
fbefb1a8 MCC |
448 | * dvb_ca_en50221_parse_attributes - Parse attribute memory of a CAM module, |
449 | * extracting Config register, and checking it is a DVB CAM module. | |
1da177e4 | 450 | * |
fbefb1a8 MCC |
451 | * @ca: CA instance. |
452 | * @slot: Slot id. | |
1da177e4 | 453 | * |
46e42a30 | 454 | * return: 0 on success, <0 on failure. |
1da177e4 LT |
455 | */ |
456 | static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot) | |
457 | { | |
a75aa90c | 458 | struct dvb_ca_slot *sl; |
1da177e4 | 459 | int address = 0; |
bacba9e5 JJ |
460 | int tuple_length; |
461 | int tuple_type; | |
1da177e4 LT |
462 | u8 tuple[257]; |
463 | char *dvb_str; | |
464 | int rasz; | |
465 | int status; | |
466 | int got_cftableentry = 0; | |
467 | int end_chain = 0; | |
468 | int i; | |
469 | u16 manfid = 0; | |
470 | u16 devid = 0; | |
471 | ||
224457a9 | 472 | /* CISTPL_DEVICE_0A */ |
bacba9e5 JJ |
473 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, |
474 | &tuple_length, tuple); | |
475 | if (status < 0) | |
1da177e4 | 476 | return status; |
bacba9e5 | 477 | if (tuple_type != 0x1D) |
1da177e4 LT |
478 | return -EINVAL; |
479 | ||
224457a9 | 480 | /* CISTPL_DEVICE_0C */ |
bacba9e5 JJ |
481 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, |
482 | &tuple_length, tuple); | |
483 | if (status < 0) | |
1da177e4 | 484 | return status; |
bacba9e5 | 485 | if (tuple_type != 0x1C) |
1da177e4 LT |
486 | return -EINVAL; |
487 | ||
224457a9 | 488 | /* CISTPL_VERS_1 */ |
bacba9e5 JJ |
489 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, |
490 | &tuple_length, tuple); | |
491 | if (status < 0) | |
1da177e4 | 492 | return status; |
bacba9e5 | 493 | if (tuple_type != 0x15) |
1da177e4 LT |
494 | return -EINVAL; |
495 | ||
224457a9 | 496 | /* CISTPL_MANFID */ |
bacba9e5 JJ |
497 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, |
498 | &tuple_length, tuple); | |
499 | if (status < 0) | |
1da177e4 | 500 | return status; |
bacba9e5 | 501 | if (tuple_type != 0x20) |
1da177e4 | 502 | return -EINVAL; |
bacba9e5 | 503 | if (tuple_length != 4) |
1da177e4 LT |
504 | return -EINVAL; |
505 | manfid = (tuple[1] << 8) | tuple[0]; | |
506 | devid = (tuple[3] << 8) | tuple[2]; | |
507 | ||
224457a9 | 508 | /* CISTPL_CONFIG */ |
bacba9e5 JJ |
509 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tuple_type, |
510 | &tuple_length, tuple); | |
511 | if (status < 0) | |
1da177e4 | 512 | return status; |
bacba9e5 | 513 | if (tuple_type != 0x1A) |
1da177e4 | 514 | return -EINVAL; |
bacba9e5 | 515 | if (tuple_length < 3) |
1da177e4 LT |
516 | return -EINVAL; |
517 | ||
518 | /* extract the configbase */ | |
519 | rasz = tuple[0] & 3; | |
bacba9e5 | 520 | if (tuple_length < (3 + rasz + 14)) |
1da177e4 | 521 | return -EINVAL; |
a75aa90c JJ |
522 | sl = &ca->slot_info[slot]; |
523 | sl->config_base = 0; | |
524 | for (i = 0; i < rasz + 1; i++) | |
525 | sl->config_base |= (tuple[2 + i] << (8 * i)); | |
1da177e4 LT |
526 | |
527 | /* check it contains the correct DVB string */ | |
bacba9e5 | 528 | dvb_str = findstr((char *)tuple, tuple_length, "DVB_CI_V", 8); |
13b51648 | 529 | if (!dvb_str) |
1da177e4 | 530 | return -EINVAL; |
bacba9e5 | 531 | if (tuple_length < ((dvb_str - (char *)tuple) + 12)) |
1da177e4 LT |
532 | return -EINVAL; |
533 | ||
534 | /* is it a version we support? */ | |
535 | if (strncmp(dvb_str + 8, "1.00", 4)) { | |
b3ad24d2 MCC |
536 | pr_err("dvb_ca adapter %d: Unsupported DVB CAM module version %c%c%c%c\n", |
537 | ca->dvbdev->adapter->num, dvb_str[8], dvb_str[9], | |
538 | dvb_str[10], dvb_str[11]); | |
1da177e4 LT |
539 | return -EINVAL; |
540 | } | |
541 | ||
542 | /* process the CFTABLE_ENTRY tuples, and any after those */ | |
543 | while ((!end_chain) && (address < 0x1000)) { | |
bacba9e5 JJ |
544 | status = dvb_ca_en50221_read_tuple(ca, slot, &address, |
545 | &tuple_type, &tuple_length, | |
546 | tuple); | |
547 | if (status < 0) | |
1da177e4 | 548 | return status; |
bacba9e5 | 549 | switch (tuple_type) { |
224457a9 | 550 | case 0x1B: /* CISTPL_CFTABLE_ENTRY */ |
bacba9e5 | 551 | if (tuple_length < (2 + 11 + 17)) |
1da177e4 LT |
552 | break; |
553 | ||
554 | /* if we've already parsed one, just use it */ | |
555 | if (got_cftableentry) | |
556 | break; | |
557 | ||
558 | /* get the config option */ | |
a75aa90c | 559 | sl->config_option = tuple[0] & 0x3f; |
1da177e4 LT |
560 | |
561 | /* OK, check it contains the correct strings */ | |
bacba9e5 JJ |
562 | if (!findstr((char *)tuple, tuple_length, |
563 | "DVB_HOST", 8) || | |
564 | !findstr((char *)tuple, tuple_length, | |
565 | "DVB_CI_MODULE", 13)) | |
1da177e4 LT |
566 | break; |
567 | ||
568 | got_cftableentry = 1; | |
569 | break; | |
570 | ||
224457a9 | 571 | case 0x14: /* CISTPL_NO_LINK */ |
1da177e4 LT |
572 | break; |
573 | ||
224457a9 | 574 | case 0xFF: /* CISTPL_END */ |
1da177e4 LT |
575 | end_chain = 1; |
576 | break; | |
577 | ||
96375b7a | 578 | default: /* Unknown tuple type - just skip this tuple */ |
b3ad24d2 | 579 | dprintk("dvb_ca: Skipping unknown tuple type:0x%x length:0x%x\n", |
bacba9e5 | 580 | tuple_type, tuple_length); |
1da177e4 LT |
581 | break; |
582 | } | |
583 | } | |
584 | ||
585 | if ((address > 0x1000) || (!got_cftableentry)) | |
586 | return -EINVAL; | |
587 | ||
588 | dprintk("Valid DVB CAM detected MANID:%x DEVID:%x CONFIGBASE:0x%x CONFIGOPTION:0x%x\n", | |
a75aa90c | 589 | manfid, devid, sl->config_base, sl->config_option); |
1da177e4 | 590 | |
224457a9 | 591 | /* success! */ |
1da177e4 LT |
592 | return 0; |
593 | } | |
594 | ||
1da177e4 | 595 | /** |
fbefb1a8 | 596 | * dvb_ca_en50221_set_configoption - Set CAM's configoption correctly. |
1da177e4 | 597 | * |
fbefb1a8 MCC |
598 | * @ca: CA instance. |
599 | * @slot: Slot containing the CAM. | |
1da177e4 LT |
600 | */ |
601 | static int dvb_ca_en50221_set_configoption(struct dvb_ca_private *ca, int slot) | |
602 | { | |
a75aa90c | 603 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
604 | int configoption; |
605 | ||
46b4f7c1 | 606 | dprintk("%s\n", __func__); |
1da177e4 LT |
607 | |
608 | /* set the config option */ | |
a75aa90c JJ |
609 | ca->pub->write_attribute_mem(ca->pub, slot, sl->config_base, |
610 | sl->config_option); | |
1da177e4 LT |
611 | |
612 | /* check it */ | |
a75aa90c JJ |
613 | configoption = ca->pub->read_attribute_mem(ca->pub, slot, |
614 | sl->config_base); | |
1da177e4 | 615 | dprintk("Set configoption 0x%x, read configoption 0x%x\n", |
a75aa90c | 616 | sl->config_option, configoption & 0x3f); |
1da177e4 LT |
617 | |
618 | /* fine! */ | |
619 | return 0; | |
1da177e4 LT |
620 | } |
621 | ||
1da177e4 | 622 | /** |
fbefb1a8 MCC |
623 | * dvb_ca_en50221_read_data - This function talks to an EN50221 CAM control |
624 | * interface. It reads a buffer of data from the CAM. The data can either | |
625 | * be stored in a supplied buffer, or automatically be added to the slot's | |
626 | * rx_buffer. | |
1da177e4 | 627 | * |
fbefb1a8 MCC |
628 | * @ca: CA instance. |
629 | * @slot: Slot to read from. | |
630 | * @ebuf: If non-NULL, the data will be written to this buffer. If NULL, | |
46e42a30 MCC |
631 | * the data will be added into the buffering system as a normal |
632 | * fragment. | |
fbefb1a8 | 633 | * @ecount: Size of ebuf. Ignored if ebuf is NULL. |
1da177e4 | 634 | * |
46e42a30 | 635 | * return: Number of bytes read, or < 0 on error |
1da177e4 | 636 | */ |
8ec6107a JJ |
637 | static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, |
638 | u8 *ebuf, int ecount) | |
1da177e4 | 639 | { |
a75aa90c | 640 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
641 | int bytes_read; |
642 | int status; | |
643 | u8 buf[HOST_LINK_BUF_SIZE]; | |
644 | int i; | |
645 | ||
46b4f7c1 | 646 | dprintk("%s\n", __func__); |
1da177e4 LT |
647 | |
648 | /* check if we have space for a link buf in the rx_buffer */ | |
13b51648 | 649 | if (!ebuf) { |
1da177e4 LT |
650 | int buf_free; |
651 | ||
a75aa90c | 652 | if (!sl->rx_buffer.data) { |
1da177e4 LT |
653 | status = -EIO; |
654 | goto exit; | |
655 | } | |
a75aa90c | 656 | buf_free = dvb_ringbuffer_free(&sl->rx_buffer); |
1da177e4 | 657 | |
a75aa90c | 658 | if (buf_free < (sl->link_buf_size + |
f894165c | 659 | DVB_RINGBUFFER_PKTHDRSIZE)) { |
1da177e4 LT |
660 | status = -EAGAIN; |
661 | goto exit; | |
662 | } | |
663 | } | |
664 | ||
f894165c | 665 | if (ca->pub->read_data && |
a75aa90c | 666 | (sl->slot_state != DVB_CA_SLOTSTATE_LINKINIT)) { |
13b51648 | 667 | if (!ebuf) |
f894165c RM |
668 | status = ca->pub->read_data(ca->pub, slot, buf, |
669 | sizeof(buf)); | |
670 | else | |
671 | status = ca->pub->read_data(ca->pub, slot, buf, ecount); | |
672 | if (status < 0) | |
673 | return status; | |
674 | bytes_read = status; | |
675 | if (status == 0) | |
676 | goto exit; | |
677 | } else { | |
f894165c RM |
678 | /* check if there is data available */ |
679 | status = ca->pub->read_cam_control(ca->pub, slot, | |
680 | CTRLIF_STATUS); | |
681 | if (status < 0) | |
1da177e4 | 682 | goto exit; |
f894165c RM |
683 | if (!(status & STATUSREG_DA)) { |
684 | /* no data */ | |
685 | status = 0; | |
1da177e4 LT |
686 | goto exit; |
687 | } | |
f894165c RM |
688 | |
689 | /* read the amount of data */ | |
690 | status = ca->pub->read_cam_control(ca->pub, slot, | |
691 | CTRLIF_SIZE_HIGH); | |
692 | if (status < 0) | |
693 | goto exit; | |
694 | bytes_read = status << 8; | |
695 | status = ca->pub->read_cam_control(ca->pub, slot, | |
696 | CTRLIF_SIZE_LOW); | |
697 | if (status < 0) | |
1da177e4 | 698 | goto exit; |
f894165c RM |
699 | bytes_read |= status; |
700 | ||
701 | /* check it will fit */ | |
13b51648 | 702 | if (!ebuf) { |
a75aa90c | 703 | if (bytes_read > sl->link_buf_size) { |
f894165c RM |
704 | pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the link buffer size (%i > %i)!\n", |
705 | ca->dvbdev->adapter->num, bytes_read, | |
a75aa90c JJ |
706 | sl->link_buf_size); |
707 | sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
f894165c RM |
708 | status = -EIO; |
709 | goto exit; | |
710 | } | |
711 | if (bytes_read < 2) { | |
712 | pr_err("dvb_ca adapter %d: CAM sent a buffer that was less than 2 bytes!\n", | |
713 | ca->dvbdev->adapter->num); | |
a75aa90c | 714 | sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; |
f894165c RM |
715 | status = -EIO; |
716 | goto exit; | |
717 | } | |
718 | } else { | |
719 | if (bytes_read > ecount) { | |
720 | pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the ecount size!\n", | |
721 | ca->dvbdev->adapter->num); | |
722 | status = -EIO; | |
723 | goto exit; | |
724 | } | |
1da177e4 | 725 | } |
1da177e4 | 726 | |
f894165c RM |
727 | /* fill the buffer */ |
728 | for (i = 0; i < bytes_read; i++) { | |
729 | /* read byte and check */ | |
730 | status = ca->pub->read_cam_control(ca->pub, slot, | |
731 | CTRLIF_DATA); | |
732 | if (status < 0) | |
733 | goto exit; | |
1da177e4 | 734 | |
f894165c RM |
735 | /* OK, store it in the buffer */ |
736 | buf[i] = status; | |
737 | } | |
1da177e4 | 738 | |
f894165c RM |
739 | /* check for read error (RE should now be 0) */ |
740 | status = ca->pub->read_cam_control(ca->pub, slot, | |
741 | CTRLIF_STATUS); | |
742 | if (status < 0) | |
743 | goto exit; | |
744 | if (status & STATUSREG_RE) { | |
a75aa90c | 745 | sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; |
f894165c RM |
746 | status = -EIO; |
747 | goto exit; | |
748 | } | |
1da177e4 LT |
749 | } |
750 | ||
96375b7a JJ |
751 | /* |
752 | * OK, add it to the receive buffer, or copy into external buffer if | |
753 | * supplied | |
754 | */ | |
13b51648 | 755 | if (!ebuf) { |
a75aa90c | 756 | if (!sl->rx_buffer.data) { |
1da177e4 LT |
757 | status = -EIO; |
758 | goto exit; | |
759 | } | |
a75aa90c | 760 | dvb_ringbuffer_pkt_write(&sl->rx_buffer, buf, bytes_read); |
1da177e4 LT |
761 | } else { |
762 | memcpy(ebuf, buf, bytes_read); | |
763 | } | |
764 | ||
765 | dprintk("Received CA packet for slot %i connection id 0x%x last_frag:%i size:0x%x\n", slot, | |
766 | buf[0], (buf[1] & 0x80) == 0, bytes_read); | |
767 | ||
768 | /* wake up readers when a last_fragment is received */ | |
7bd8cc8f | 769 | if ((buf[1] & 0x80) == 0x00) |
1da177e4 | 770 | wake_up_interruptible(&ca->wait_queue); |
7bd8cc8f | 771 | |
1da177e4 LT |
772 | status = bytes_read; |
773 | ||
774 | exit: | |
775 | return status; | |
776 | } | |
777 | ||
1da177e4 | 778 | /** |
fbefb1a8 MCC |
779 | * dvb_ca_en50221_write_data - This function talks to an EN50221 CAM control |
780 | * interface. It writes a buffer of data to a CAM. | |
1da177e4 | 781 | * |
fbefb1a8 MCC |
782 | * @ca: CA instance. |
783 | * @slot: Slot to write to. | |
46e42a30 | 784 | * @buf: The data in this buffer is treated as a complete link-level packet to |
4a3fad70 | 785 | * be written. |
46e42a30 | 786 | * @bytes_write: Size of ebuf. |
a4315e5b YY |
787 | * @size_write_flag: A flag on Command Register which says whether the link size |
788 | * information will be writen or not. | |
1da177e4 | 789 | * |
46e42a30 | 790 | * return: Number of bytes written, or < 0 on error. |
1da177e4 | 791 | */ |
8ec6107a | 792 | static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, |
a4315e5b | 793 | u8 *buf, int bytes_write, int size_write_flag) |
1da177e4 | 794 | { |
a75aa90c | 795 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
796 | int status; |
797 | int i; | |
798 | ||
46b4f7c1 | 799 | dprintk("%s\n", __func__); |
1da177e4 | 800 | |
d7e43844 | 801 | /* sanity check */ |
a75aa90c | 802 | if (bytes_write > sl->link_buf_size) |
1da177e4 LT |
803 | return -EINVAL; |
804 | ||
f894165c | 805 | if (ca->pub->write_data && |
a75aa90c | 806 | (sl->slot_state != DVB_CA_SLOTSTATE_LINKINIT)) |
f894165c RM |
807 | return ca->pub->write_data(ca->pub, slot, buf, bytes_write); |
808 | ||
a1ca23d1 JJ |
809 | /* |
810 | * it is possible we are dealing with a single buffer implementation, | |
811 | * thus if there is data available for read or if there is even a read | |
812 | * already in progress, we do nothing but awake the kernel thread to | |
813 | * process the data if necessary. | |
814 | */ | |
bacba9e5 JJ |
815 | status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
816 | if (status < 0) | |
1da177e4 LT |
817 | goto exitnowrite; |
818 | if (status & (STATUSREG_DA | STATUSREG_RE)) { | |
d7e43844 MD |
819 | if (status & STATUSREG_DA) |
820 | dvb_ca_en50221_thread_wakeup(ca); | |
821 | ||
1da177e4 LT |
822 | status = -EAGAIN; |
823 | goto exitnowrite; | |
824 | } | |
825 | ||
826 | /* OK, set HC bit */ | |
bacba9e5 | 827 | status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, |
a4315e5b | 828 | IRQEN | CMDREG_HC | size_write_flag); |
bacba9e5 | 829 | if (status) |
1da177e4 LT |
830 | goto exit; |
831 | ||
832 | /* check if interface is still free */ | |
bacba9e5 JJ |
833 | status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
834 | if (status < 0) | |
1da177e4 LT |
835 | goto exit; |
836 | if (!(status & STATUSREG_FR)) { | |
837 | /* it wasn't free => try again later */ | |
838 | status = -EAGAIN; | |
839 | goto exit; | |
840 | } | |
841 | ||
e7080d44 J |
842 | /* |
843 | * It may need some time for the CAM to settle down, or there might | |
844 | * be a race condition between the CAM, writing HC and our last | |
845 | * check for DA. This happens, if the CAM asserts DA, just after | |
846 | * checking DA before we are setting HC. In this case it might be | |
847 | * a bug in the CAM to keep the FR bit, the lower layer/HW | |
848 | * communication requires a longer timeout or the CAM needs more | |
849 | * time internally. But this happens in reality! | |
850 | * We need to read the status from the HW again and do the same | |
851 | * we did for the previous check for DA | |
852 | */ | |
853 | status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); | |
854 | if (status < 0) | |
855 | goto exit; | |
856 | ||
857 | if (status & (STATUSREG_DA | STATUSREG_RE)) { | |
858 | if (status & STATUSREG_DA) | |
859 | dvb_ca_en50221_thread_wakeup(ca); | |
860 | ||
861 | status = -EAGAIN; | |
862 | goto exit; | |
863 | } | |
864 | ||
1da177e4 | 865 | /* send the amount of data */ |
bacba9e5 JJ |
866 | status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH, |
867 | bytes_write >> 8); | |
868 | if (status) | |
1da177e4 | 869 | goto exit; |
bacba9e5 JJ |
870 | status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW, |
871 | bytes_write & 0xff); | |
872 | if (status) | |
1da177e4 LT |
873 | goto exit; |
874 | ||
875 | /* send the buffer */ | |
876 | for (i = 0; i < bytes_write; i++) { | |
bacba9e5 JJ |
877 | status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_DATA, |
878 | buf[i]); | |
879 | if (status) | |
1da177e4 LT |
880 | goto exit; |
881 | } | |
882 | ||
883 | /* check for write error (WE should now be 0) */ | |
bacba9e5 JJ |
884 | status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
885 | if (status < 0) | |
1da177e4 LT |
886 | goto exit; |
887 | if (status & STATUSREG_WE) { | |
a75aa90c | 888 | sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; |
1da177e4 LT |
889 | status = -EIO; |
890 | goto exit; | |
891 | } | |
892 | status = bytes_write; | |
893 | ||
894 | dprintk("Wrote CA packet for slot %i, connection id 0x%x last_frag:%i size:0x%x\n", slot, | |
895 | buf[0], (buf[1] & 0x80) == 0, bytes_write); | |
896 | ||
897 | exit: | |
898 | ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN); | |
899 | ||
900 | exitnowrite: | |
901 | return status; | |
902 | } | |
1da177e4 | 903 | |
96375b7a | 904 | /* ************************************************************************** */ |
1da177e4 LT |
905 | /* EN50221 higher level functions */ |
906 | ||
1da177e4 | 907 | /** |
97adc2b3 | 908 | * dvb_ca_en50221_slot_shutdown - A CAM has been removed => shut it down. |
1da177e4 | 909 | * |
fbefb1a8 MCC |
910 | * @ca: CA instance. |
911 | * @slot: Slot to shut down. | |
1da177e4 LT |
912 | */ |
913 | static int dvb_ca_en50221_slot_shutdown(struct dvb_ca_private *ca, int slot) | |
914 | { | |
46b4f7c1 | 915 | dprintk("%s\n", __func__); |
1da177e4 | 916 | |
1da177e4 LT |
917 | ca->pub->slot_shutdown(ca->pub, slot); |
918 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1da177e4 | 919 | |
a1ca23d1 JJ |
920 | /* |
921 | * need to wake up all processes to check if they're now trying to | |
922 | * write to a defunct CAM | |
923 | */ | |
1da177e4 LT |
924 | wake_up_interruptible(&ca->wait_queue); |
925 | ||
926 | dprintk("Slot %i shutdown\n", slot); | |
927 | ||
928 | /* success */ | |
929 | return 0; | |
930 | } | |
1da177e4 | 931 | |
1da177e4 | 932 | /** |
97adc2b3 | 933 | * dvb_ca_en50221_camchange_irq - A CAMCHANGE IRQ has occurred. |
1da177e4 | 934 | * |
46e42a30 | 935 | * @pubca: CA instance. |
fbefb1a8 MCC |
936 | * @slot: Slot concerned. |
937 | * @change_type: One of the DVB_CA_CAMCHANGE_* values. | |
1da177e4 | 938 | */ |
96375b7a JJ |
939 | void dvb_ca_en50221_camchange_irq(struct dvb_ca_en50221 *pubca, int slot, |
940 | int change_type) | |
1da177e4 | 941 | { |
0c53c70f | 942 | struct dvb_ca_private *ca = pubca->private; |
a75aa90c | 943 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
944 | |
945 | dprintk("CAMCHANGE IRQ slot:%i change_type:%i\n", slot, change_type); | |
946 | ||
947 | switch (change_type) { | |
948 | case DVB_CA_EN50221_CAMCHANGE_REMOVED: | |
949 | case DVB_CA_EN50221_CAMCHANGE_INSERTED: | |
950 | break; | |
951 | ||
952 | default: | |
953 | return; | |
954 | } | |
955 | ||
a75aa90c JJ |
956 | sl->camchange_type = change_type; |
957 | atomic_inc(&sl->camchange_count); | |
1da177e4 LT |
958 | dvb_ca_en50221_thread_wakeup(ca); |
959 | } | |
97adc2b3 | 960 | EXPORT_SYMBOL(dvb_ca_en50221_camchange_irq); |
1da177e4 | 961 | |
1da177e4 | 962 | /** |
fbefb1a8 | 963 | * dvb_ca_en50221_camready_irq - A CAMREADY IRQ has occurred. |
1da177e4 | 964 | * |
46e42a30 | 965 | * @pubca: CA instance. |
fbefb1a8 | 966 | * @slot: Slot concerned. |
1da177e4 LT |
967 | */ |
968 | void dvb_ca_en50221_camready_irq(struct dvb_ca_en50221 *pubca, int slot) | |
969 | { | |
0c53c70f | 970 | struct dvb_ca_private *ca = pubca->private; |
a75aa90c | 971 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
972 | |
973 | dprintk("CAMREADY IRQ slot:%i\n", slot); | |
974 | ||
a75aa90c JJ |
975 | if (sl->slot_state == DVB_CA_SLOTSTATE_WAITREADY) { |
976 | sl->slot_state = DVB_CA_SLOTSTATE_VALIDATE; | |
1da177e4 LT |
977 | dvb_ca_en50221_thread_wakeup(ca); |
978 | } | |
979 | } | |
97adc2b3 | 980 | EXPORT_SYMBOL(dvb_ca_en50221_camready_irq); |
1da177e4 | 981 | |
1da177e4 | 982 | /** |
97adc2b3 | 983 | * dvb_ca_en50221_frda_irq - An FR or DA IRQ has occurred. |
1da177e4 | 984 | * |
46e42a30 | 985 | * @pubca: CA instance. |
fbefb1a8 | 986 | * @slot: Slot concerned. |
1da177e4 LT |
987 | */ |
988 | void dvb_ca_en50221_frda_irq(struct dvb_ca_en50221 *pubca, int slot) | |
989 | { | |
0c53c70f | 990 | struct dvb_ca_private *ca = pubca->private; |
a75aa90c | 991 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 LT |
992 | int flags; |
993 | ||
994 | dprintk("FR/DA IRQ slot:%i\n", slot); | |
995 | ||
a75aa90c | 996 | switch (sl->slot_state) { |
1da177e4 LT |
997 | case DVB_CA_SLOTSTATE_LINKINIT: |
998 | flags = ca->pub->read_cam_control(pubca, slot, CTRLIF_STATUS); | |
999 | if (flags & STATUSREG_DA) { | |
1000 | dprintk("CAM supports DA IRQ\n"); | |
a75aa90c | 1001 | sl->da_irq_supported = 1; |
1da177e4 LT |
1002 | } |
1003 | break; | |
1004 | ||
1005 | case DVB_CA_SLOTSTATE_RUNNING: | |
1006 | if (ca->open) | |
ded92846 | 1007 | dvb_ca_en50221_thread_wakeup(ca); |
1da177e4 LT |
1008 | break; |
1009 | } | |
1010 | } | |
97adc2b3 | 1011 | EXPORT_SYMBOL(dvb_ca_en50221_frda_irq); |
1da177e4 | 1012 | |
96375b7a | 1013 | /* ************************************************************************** */ |
1da177e4 LT |
1014 | /* EN50221 thread functions */ |
1015 | ||
1016 | /** | |
a4184b4f | 1017 | * dvb_ca_en50221_thread_wakeup - Wake up the DVB CA thread |
1da177e4 | 1018 | * |
fbefb1a8 | 1019 | * @ca: CA instance. |
1da177e4 LT |
1020 | */ |
1021 | static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca) | |
1022 | { | |
46b4f7c1 | 1023 | dprintk("%s\n", __func__); |
1da177e4 LT |
1024 | |
1025 | ca->wakeup = 1; | |
1026 | mb(); | |
9320874a | 1027 | wake_up_process(ca->thread); |
1da177e4 LT |
1028 | } |
1029 | ||
1da177e4 | 1030 | /** |
a4184b4f | 1031 | * dvb_ca_en50221_thread_update_delay - Update the delay used by the thread. |
1da177e4 | 1032 | * |
fbefb1a8 | 1033 | * @ca: CA instance. |
1da177e4 LT |
1034 | */ |
1035 | static void dvb_ca_en50221_thread_update_delay(struct dvb_ca_private *ca) | |
1036 | { | |
1037 | int delay; | |
1038 | int curdelay = 100000000; | |
1039 | int slot; | |
1040 | ||
dc32f324 JJ |
1041 | /* |
1042 | * Beware of too high polling frequency, because one polling | |
71a35fe2 RS |
1043 | * call might take several hundred milliseconds until timeout! |
1044 | */ | |
1da177e4 | 1045 | for (slot = 0; slot < ca->slot_count; slot++) { |
a75aa90c JJ |
1046 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1047 | ||
1048 | switch (sl->slot_state) { | |
1da177e4 LT |
1049 | default: |
1050 | case DVB_CA_SLOTSTATE_NONE: | |
71a35fe2 RS |
1051 | delay = HZ * 60; /* 60s */ |
1052 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) | |
1053 | delay = HZ * 5; /* 5s */ | |
1054 | break; | |
1da177e4 | 1055 | case DVB_CA_SLOTSTATE_INVALID: |
71a35fe2 RS |
1056 | delay = HZ * 60; /* 60s */ |
1057 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) | |
1058 | delay = HZ / 10; /* 100ms */ | |
1da177e4 LT |
1059 | break; |
1060 | ||
1061 | case DVB_CA_SLOTSTATE_UNINITIALISED: | |
1062 | case DVB_CA_SLOTSTATE_WAITREADY: | |
1063 | case DVB_CA_SLOTSTATE_VALIDATE: | |
1064 | case DVB_CA_SLOTSTATE_WAITFR: | |
1065 | case DVB_CA_SLOTSTATE_LINKINIT: | |
71a35fe2 | 1066 | delay = HZ / 10; /* 100ms */ |
1da177e4 LT |
1067 | break; |
1068 | ||
1069 | case DVB_CA_SLOTSTATE_RUNNING: | |
71a35fe2 RS |
1070 | delay = HZ * 60; /* 60s */ |
1071 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) | |
1072 | delay = HZ / 10; /* 100ms */ | |
1da177e4 | 1073 | if (ca->open) { |
a75aa90c | 1074 | if ((!sl->da_irq_supported) || |
71a35fe2 RS |
1075 | (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_DA))) |
1076 | delay = HZ / 10; /* 100ms */ | |
1da177e4 LT |
1077 | } |
1078 | break; | |
1079 | } | |
1080 | ||
1081 | if (delay < curdelay) | |
1082 | curdelay = delay; | |
1083 | } | |
1084 | ||
1085 | ca->delay = curdelay; | |
1086 | } | |
1087 | ||
5d023252 | 1088 | /** |
a4184b4f | 1089 | * dvb_ca_en50221_poll_cam_gone - Poll if the CAM is gone. |
5d023252 JJ |
1090 | * |
1091 | * @ca: CA instance. | |
1092 | * @slot: Slot to process. | |
46e42a30 | 1093 | * return:: 0 .. no change |
5d023252 JJ |
1094 | * 1 .. CAM state changed |
1095 | */ | |
1096 | ||
1097 | static int dvb_ca_en50221_poll_cam_gone(struct dvb_ca_private *ca, int slot) | |
1098 | { | |
1099 | int changed = 0; | |
1100 | int status; | |
1101 | ||
1102 | /* | |
1103 | * we need this extra check for annoying interfaces like the | |
1104 | * budget-av | |
1105 | */ | |
1106 | if ((!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) && | |
1107 | (ca->pub->poll_slot_status)) { | |
1108 | status = ca->pub->poll_slot_status(ca->pub, slot, 0); | |
1109 | if (!(status & | |
1110 | DVB_CA_EN50221_POLL_CAM_PRESENT)) { | |
1111 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; | |
1112 | dvb_ca_en50221_thread_update_delay(ca); | |
1113 | changed = 1; | |
1114 | } | |
1115 | } | |
1116 | return changed; | |
1117 | } | |
1118 | ||
1da177e4 | 1119 | /** |
a4184b4f HV |
1120 | * dvb_ca_en50221_thread_state_machine - Thread state machine for one CA slot |
1121 | * to perform the data transfer. | |
a004b70e JJ |
1122 | * |
1123 | * @ca: CA instance. | |
1124 | * @slot: Slot to process. | |
1da177e4 | 1125 | */ |
a004b70e JJ |
1126 | static void dvb_ca_en50221_thread_state_machine(struct dvb_ca_private *ca, |
1127 | int slot) | |
1da177e4 | 1128 | { |
a004b70e | 1129 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1da177e4 | 1130 | int flags; |
1da177e4 LT |
1131 | int pktcount; |
1132 | void *rxbuf; | |
1133 | ||
a004b70e | 1134 | mutex_lock(&sl->slot_lock); |
1da177e4 | 1135 | |
a004b70e JJ |
1136 | /* check the cam status + deal with CAMCHANGEs */ |
1137 | while (dvb_ca_en50221_check_camstatus(ca, slot)) { | |
1138 | /* clear down an old CI slot if necessary */ | |
1139 | if (sl->slot_state != DVB_CA_SLOTSTATE_NONE) | |
1140 | dvb_ca_en50221_slot_shutdown(ca, slot); | |
1da177e4 | 1141 | |
a004b70e JJ |
1142 | /* if a CAM is NOW present, initialise it */ |
1143 | if (sl->camchange_type == DVB_CA_EN50221_CAMCHANGE_INSERTED) | |
1144 | sl->slot_state = DVB_CA_SLOTSTATE_UNINITIALISED; | |
1da177e4 | 1145 | |
a004b70e JJ |
1146 | /* we've handled one CAMCHANGE */ |
1147 | dvb_ca_en50221_thread_update_delay(ca); | |
1148 | atomic_dec(&sl->camchange_count); | |
1149 | } | |
1da177e4 | 1150 | |
a004b70e JJ |
1151 | /* CAM state machine */ |
1152 | switch (sl->slot_state) { | |
1153 | case DVB_CA_SLOTSTATE_NONE: | |
1154 | case DVB_CA_SLOTSTATE_INVALID: | |
1155 | /* no action needed */ | |
1156 | break; | |
1da177e4 | 1157 | |
a004b70e JJ |
1158 | case DVB_CA_SLOTSTATE_UNINITIALISED: |
1159 | sl->slot_state = DVB_CA_SLOTSTATE_WAITREADY; | |
1160 | ca->pub->slot_reset(ca->pub, slot); | |
1161 | sl->timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); | |
1162 | break; | |
1da177e4 | 1163 | |
a004b70e JJ |
1164 | case DVB_CA_SLOTSTATE_WAITREADY: |
1165 | if (time_after(jiffies, sl->timeout)) { | |
1166 | pr_err("dvb_ca adaptor %d: PC card did not respond :(\n", | |
1167 | ca->dvbdev->adapter->num); | |
1168 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1169 | dvb_ca_en50221_thread_update_delay(ca); | |
1170 | break; | |
1171 | } | |
1172 | /* | |
1173 | * no other action needed; will automatically change state when | |
1174 | * ready | |
1175 | */ | |
1176 | break; | |
1da177e4 | 1177 | |
a004b70e JJ |
1178 | case DVB_CA_SLOTSTATE_VALIDATE: |
1179 | if (dvb_ca_en50221_parse_attributes(ca, slot) != 0) { | |
5d023252 JJ |
1180 | if (dvb_ca_en50221_poll_cam_gone(ca, slot)) |
1181 | break; | |
1da177e4 | 1182 | |
a004b70e JJ |
1183 | pr_err("dvb_ca adapter %d: Invalid PC card inserted :(\n", |
1184 | ca->dvbdev->adapter->num); | |
1185 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1186 | dvb_ca_en50221_thread_update_delay(ca); | |
1187 | break; | |
1188 | } | |
1189 | if (dvb_ca_en50221_set_configoption(ca, slot) != 0) { | |
1190 | pr_err("dvb_ca adapter %d: Unable to initialise CAM :(\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 | if (ca->pub->write_cam_control(ca->pub, slot, | |
1197 | CTRLIF_COMMAND, | |
1198 | CMDREG_RS) != 0) { | |
1199 | pr_err("dvb_ca adapter %d: Unable to reset CAM IF\n", | |
1200 | ca->dvbdev->adapter->num); | |
1201 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1202 | dvb_ca_en50221_thread_update_delay(ca); | |
1203 | break; | |
1204 | } | |
1205 | dprintk("DVB CAM validated successfully\n"); | |
1da177e4 | 1206 | |
a004b70e JJ |
1207 | sl->timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); |
1208 | sl->slot_state = DVB_CA_SLOTSTATE_WAITFR; | |
1209 | ca->wakeup = 1; | |
1210 | break; | |
1da177e4 | 1211 | |
a004b70e JJ |
1212 | case DVB_CA_SLOTSTATE_WAITFR: |
1213 | if (time_after(jiffies, sl->timeout)) { | |
1214 | pr_err("dvb_ca adapter %d: DVB CAM did not respond :(\n", | |
1215 | ca->dvbdev->adapter->num); | |
1216 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; | |
1217 | dvb_ca_en50221_thread_update_delay(ca); | |
1218 | break; | |
1219 | } | |
1da177e4 | 1220 | |
a004b70e JJ |
1221 | flags = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
1222 | if (flags & STATUSREG_FR) { | |
1223 | sl->slot_state = DVB_CA_SLOTSTATE_LINKINIT; | |
1224 | ca->wakeup = 1; | |
1225 | } | |
1226 | break; | |
1da177e4 | 1227 | |
a004b70e JJ |
1228 | case DVB_CA_SLOTSTATE_LINKINIT: |
1229 | if (dvb_ca_en50221_link_init(ca, slot) != 0) { | |
5d023252 JJ |
1230 | if (dvb_ca_en50221_poll_cam_gone(ca, slot)) |
1231 | break; | |
1da177e4 | 1232 | |
a004b70e JJ |
1233 | pr_err("dvb_ca adapter %d: DVB CAM link initialisation failed :(\n", |
1234 | ca->dvbdev->adapter->num); | |
1235 | sl->slot_state = DVB_CA_SLOTSTATE_UNINITIALISED; | |
1236 | dvb_ca_en50221_thread_update_delay(ca); | |
1237 | break; | |
1238 | } | |
1da177e4 | 1239 | |
a004b70e JJ |
1240 | if (!sl->rx_buffer.data) { |
1241 | rxbuf = vmalloc(RX_BUFFER_SIZE); | |
1242 | if (!rxbuf) { | |
1243 | pr_err("dvb_ca adapter %d: Unable to allocate CAM rx buffer :(\n", | |
b3ad24d2 | 1244 | ca->dvbdev->adapter->num); |
a004b70e JJ |
1245 | sl->slot_state = DVB_CA_SLOTSTATE_INVALID; |
1246 | dvb_ca_en50221_thread_update_delay(ca); | |
1da177e4 | 1247 | break; |
a004b70e JJ |
1248 | } |
1249 | dvb_ringbuffer_init(&sl->rx_buffer, rxbuf, | |
1250 | RX_BUFFER_SIZE); | |
1251 | } | |
1da177e4 | 1252 | |
a004b70e JJ |
1253 | ca->pub->slot_ts_enable(ca->pub, slot); |
1254 | sl->slot_state = DVB_CA_SLOTSTATE_RUNNING; | |
1255 | dvb_ca_en50221_thread_update_delay(ca); | |
1aebed32 DS |
1256 | pr_info("dvb_ca adapter %d: DVB CAM detected and initialised successfully\n", |
1257 | ca->dvbdev->adapter->num); | |
a004b70e | 1258 | break; |
1da177e4 | 1259 | |
a004b70e JJ |
1260 | case DVB_CA_SLOTSTATE_RUNNING: |
1261 | if (!ca->open) | |
1262 | break; | |
1263 | ||
1264 | /* poll slots for data */ | |
1265 | pktcount = 0; | |
1266 | while (dvb_ca_en50221_read_data(ca, slot, NULL, 0) > 0) { | |
1267 | if (!ca->open) | |
1268 | break; | |
1269 | ||
1270 | /* | |
1271 | * if a CAMCHANGE occurred at some point, do not do any | |
1272 | * more processing of this slot | |
1273 | */ | |
1274 | if (dvb_ca_en50221_check_camstatus(ca, slot)) { | |
1275 | /* | |
4ecb4bfc | 1276 | * we don't want to sleep on the next iteration |
a004b70e JJ |
1277 | * so we can handle the cam change |
1278 | */ | |
1279 | ca->wakeup = 1; | |
1da177e4 LT |
1280 | break; |
1281 | } | |
d7e43844 | 1282 | |
a004b70e JJ |
1283 | /* check if we've hit our limit this time */ |
1284 | if (++pktcount >= MAX_RX_PACKETS_PER_ITERATION) { | |
1285 | /* | |
4ecb4bfc | 1286 | * don't sleep; there is likely to be more data |
a004b70e JJ |
1287 | * to read |
1288 | */ | |
1289 | ca->wakeup = 1; | |
1290 | break; | |
1291 | } | |
1da177e4 | 1292 | } |
a004b70e JJ |
1293 | break; |
1294 | } | |
1295 | ||
1296 | mutex_unlock(&sl->slot_lock); | |
1297 | } | |
1298 | ||
46e42a30 | 1299 | /* |
a004b70e JJ |
1300 | * Kernel thread which monitors CA slots for CAM changes, and performs data |
1301 | * transfers. | |
1302 | */ | |
1303 | static int dvb_ca_en50221_thread(void *data) | |
1304 | { | |
1305 | struct dvb_ca_private *ca = data; | |
1306 | int slot; | |
1307 | ||
1308 | dprintk("%s\n", __func__); | |
1309 | ||
1310 | /* choose the correct initial delay */ | |
1311 | dvb_ca_en50221_thread_update_delay(ca); | |
1312 | ||
1313 | /* main loop */ | |
1314 | while (!kthread_should_stop()) { | |
1315 | /* sleep for a bit */ | |
1316 | if (!ca->wakeup) { | |
1317 | set_current_state(TASK_INTERRUPTIBLE); | |
1318 | schedule_timeout(ca->delay); | |
1319 | if (kthread_should_stop()) | |
1320 | return 0; | |
1321 | } | |
1322 | ca->wakeup = 0; | |
1323 | ||
1324 | /* go through all the slots processing them */ | |
1325 | for (slot = 0; slot < ca->slot_count; slot++) | |
1326 | dvb_ca_en50221_thread_state_machine(ca, slot); | |
1da177e4 LT |
1327 | } |
1328 | ||
1da177e4 LT |
1329 | return 0; |
1330 | } | |
1331 | ||
96375b7a | 1332 | /* ************************************************************************** */ |
1da177e4 LT |
1333 | /* EN50221 IO interface functions */ |
1334 | ||
1335 | /** | |
a4184b4f | 1336 | * dvb_ca_en50221_io_do_ioctl - Real ioctl implementation. |
1da177e4 | 1337 | * |
fbefb1a8 MCC |
1338 | * @file: File concerned. |
1339 | * @cmd: IOCTL command. | |
46e42a30 | 1340 | * @parg: Associated argument. |
1da177e4 | 1341 | * |
a4184b4f HV |
1342 | * NOTE: CA_SEND_MSG/CA_GET_MSG ioctls have userspace buffers passed to them. |
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 | 1392 | slot = info->num; |
6706fe55 | 1393 | if ((slot >= ca->slot_count) || (slot < 0)) { |
c4fe29a3 DC |
1394 | err = -EINVAL; |
1395 | goto out_unlock; | |
1396 | } | |
d382c5be | 1397 | slot = array_index_nospec(slot, ca->slot_count); |
1da177e4 LT |
1398 | |
1399 | info->type = CA_CI_LINK; | |
1400 | info->flags = 0; | |
a75aa90c JJ |
1401 | sl = &ca->slot_info[slot]; |
1402 | if ((sl->slot_state != DVB_CA_SLOTSTATE_NONE) && | |
1403 | (sl->slot_state != DVB_CA_SLOTSTATE_INVALID)) { | |
1da177e4 LT |
1404 | info->flags = CA_CI_MODULE_PRESENT; |
1405 | } | |
a75aa90c | 1406 | if (sl->slot_state == DVB_CA_SLOTSTATE_RUNNING) |
1da177e4 | 1407 | info->flags |= CA_CI_MODULE_READY; |
1da177e4 LT |
1408 | break; |
1409 | } | |
1410 | ||
1411 | default: | |
1412 | err = -EINVAL; | |
1413 | break; | |
1414 | } | |
1415 | ||
c4fe29a3 | 1416 | out_unlock: |
30ad64b8 | 1417 | mutex_unlock(&ca->ioctl_mutex); |
1da177e4 LT |
1418 | return err; |
1419 | } | |
1420 | ||
1da177e4 | 1421 | /** |
a4184b4f | 1422 | * dvb_ca_en50221_io_ioctl - Wrapper for ioctl implementation. |
1da177e4 | 1423 | * |
fbefb1a8 MCC |
1424 | * @file: File concerned. |
1425 | * @cmd: IOCTL command. | |
1426 | * @arg: Associated argument. | |
1da177e4 | 1427 | * |
46e42a30 | 1428 | * return: 0 on success, <0 on error. |
1da177e4 | 1429 | */ |
16ef8def AB |
1430 | static long dvb_ca_en50221_io_ioctl(struct file *file, |
1431 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1432 | { |
72024f1e | 1433 | return dvb_usercopy(file, cmd, arg, dvb_ca_en50221_io_do_ioctl); |
1da177e4 LT |
1434 | } |
1435 | ||
1da177e4 | 1436 | /** |
a4184b4f | 1437 | * dvb_ca_en50221_io_write - Implementation of write() syscall. |
1da177e4 | 1438 | * |
fbefb1a8 MCC |
1439 | * @file: File structure. |
1440 | * @buf: Source buffer. | |
1441 | * @count: Size of source buffer. | |
1442 | * @ppos: Position in file (ignored). | |
1da177e4 | 1443 | * |
46e42a30 | 1444 | * return: Number of bytes read, or <0 on error. |
1da177e4 LT |
1445 | */ |
1446 | static ssize_t dvb_ca_en50221_io_write(struct file *file, | |
8ec6107a JJ |
1447 | const char __user *buf, size_t count, |
1448 | loff_t *ppos) | |
1da177e4 | 1449 | { |
0c53c70f JS |
1450 | struct dvb_device *dvbdev = file->private_data; |
1451 | struct dvb_ca_private *ca = dvbdev->priv; | |
a75aa90c | 1452 | struct dvb_ca_slot *sl; |
1da177e4 LT |
1453 | u8 slot, connection_id; |
1454 | int status; | |
260f8d7c | 1455 | u8 fragbuf[HOST_LINK_BUF_SIZE]; |
1da177e4 LT |
1456 | int fragpos = 0; |
1457 | int fraglen; | |
1458 | unsigned long timeout; | |
1459 | int written; | |
1460 | ||
46b4f7c1 | 1461 | dprintk("%s\n", __func__); |
1da177e4 | 1462 | |
96375b7a JJ |
1463 | /* |
1464 | * Incoming packet has a 2 byte header. | |
1465 | * hdr[0] = slot_id, hdr[1] = connection_id | |
1466 | */ | |
1da177e4 LT |
1467 | if (count < 2) |
1468 | return -EINVAL; | |
1469 | ||
1470 | /* extract slot & connection id */ | |
1471 | if (copy_from_user(&slot, buf, 1)) | |
1472 | return -EFAULT; | |
1473 | if (copy_from_user(&connection_id, buf + 1, 1)) | |
1474 | return -EFAULT; | |
1475 | buf += 2; | |
1476 | count -= 2; | |
a24e6348 CIK |
1477 | |
1478 | if (slot >= ca->slot_count) | |
1479 | return -EINVAL; | |
4f5ab5d7 | 1480 | slot = array_index_nospec(slot, ca->slot_count); |
a75aa90c | 1481 | sl = &ca->slot_info[slot]; |
1da177e4 LT |
1482 | |
1483 | /* check if the slot is actually running */ | |
a75aa90c | 1484 | if (sl->slot_state != DVB_CA_SLOTSTATE_RUNNING) |
1da177e4 LT |
1485 | return -EINVAL; |
1486 | ||
1487 | /* fragment the packets & store in the buffer */ | |
1488 | while (fragpos < count) { | |
a75aa90c | 1489 | fraglen = sl->link_buf_size - 2; |
624f0c18 MCC |
1490 | if (fraglen < 0) |
1491 | break; | |
1492 | if (fraglen > HOST_LINK_BUF_SIZE - 2) | |
1493 | fraglen = HOST_LINK_BUF_SIZE - 2; | |
1da177e4 LT |
1494 | if ((count - fragpos) < fraglen) |
1495 | fraglen = count - fragpos; | |
1496 | ||
1497 | fragbuf[0] = connection_id; | |
1498 | fragbuf[1] = ((fragpos + fraglen) < count) ? 0x80 : 0x00; | |
e252984c DC |
1499 | status = copy_from_user(fragbuf + 2, buf + fragpos, fraglen); |
1500 | if (status) { | |
1501 | status = -EFAULT; | |
1da177e4 | 1502 | goto exit; |
e252984c | 1503 | } |
1da177e4 LT |
1504 | |
1505 | timeout = jiffies + HZ / 2; | |
1506 | written = 0; | |
1507 | while (!time_after(jiffies, timeout)) { | |
96375b7a JJ |
1508 | /* |
1509 | * check the CAM hasn't been removed/reset in the | |
1510 | * meantime | |
1511 | */ | |
a75aa90c | 1512 | if (sl->slot_state != DVB_CA_SLOTSTATE_RUNNING) { |
1da177e4 LT |
1513 | status = -EIO; |
1514 | goto exit; | |
1515 | } | |
1516 | ||
a75aa90c | 1517 | mutex_lock(&sl->slot_lock); |
96375b7a | 1518 | status = dvb_ca_en50221_write_data(ca, slot, fragbuf, |
a4315e5b | 1519 | fraglen + 2, 0); |
a75aa90c | 1520 | mutex_unlock(&sl->slot_lock); |
1da177e4 LT |
1521 | if (status == (fraglen + 2)) { |
1522 | written = 1; | |
1523 | break; | |
1524 | } | |
1525 | if (status != -EAGAIN) | |
1526 | goto exit; | |
1527 | ||
b9af29e1 | 1528 | usleep_range(1000, 1100); |
1da177e4 LT |
1529 | } |
1530 | if (!written) { | |
1531 | status = -EIO; | |
1532 | goto exit; | |
1533 | } | |
1534 | ||
1535 | fragpos += fraglen; | |
1536 | } | |
1537 | status = count + 2; | |
1538 | ||
1539 | exit: | |
1540 | return status; | |
1541 | } | |
1542 | ||
46e42a30 | 1543 | /* |
1da177e4 LT |
1544 | * Condition for waking up in dvb_ca_en50221_io_read_condition |
1545 | */ | |
ded92846 AQ |
1546 | static int dvb_ca_en50221_io_read_condition(struct dvb_ca_private *ca, |
1547 | int *result, int *_slot) | |
1da177e4 LT |
1548 | { |
1549 | int slot; | |
1550 | int slot_count = 0; | |
1551 | int idx; | |
ded92846 | 1552 | size_t fraglen; |
1da177e4 LT |
1553 | int connection_id = -1; |
1554 | int found = 0; | |
1555 | u8 hdr[2]; | |
1556 | ||
1557 | slot = ca->next_read_slot; | |
1558 | while ((slot_count < ca->slot_count) && (!found)) { | |
a75aa90c JJ |
1559 | struct dvb_ca_slot *sl = &ca->slot_info[slot]; |
1560 | ||
1561 | if (sl->slot_state != DVB_CA_SLOTSTATE_RUNNING) | |
1da177e4 LT |
1562 | goto nextslot; |
1563 | ||
a75aa90c | 1564 | if (!sl->rx_buffer.data) |
1da177e4 | 1565 | return 0; |
1da177e4 | 1566 | |
a75aa90c | 1567 | idx = dvb_ringbuffer_pkt_next(&sl->rx_buffer, -1, &fraglen); |
1da177e4 | 1568 | while (idx != -1) { |
a75aa90c | 1569 | dvb_ringbuffer_pkt_read(&sl->rx_buffer, idx, 0, hdr, 2); |
1da177e4 LT |
1570 | if (connection_id == -1) |
1571 | connection_id = hdr[0]; | |
96375b7a JJ |
1572 | if ((hdr[0] == connection_id) && |
1573 | ((hdr[1] & 0x80) == 0)) { | |
1da177e4 LT |
1574 | *_slot = slot; |
1575 | found = 1; | |
1576 | break; | |
1577 | } | |
1578 | ||
a75aa90c JJ |
1579 | idx = dvb_ringbuffer_pkt_next(&sl->rx_buffer, idx, |
1580 | &fraglen); | |
1da177e4 LT |
1581 | } |
1582 | ||
ded92846 | 1583 | nextslot: |
1da177e4 LT |
1584 | slot = (slot + 1) % ca->slot_count; |
1585 | slot_count++; | |
1586 | } | |
1587 | ||
1588 | ca->next_read_slot = slot; | |
1589 | return found; | |
1590 | } | |
1591 | ||
1da177e4 | 1592 | /** |
a4184b4f | 1593 | * dvb_ca_en50221_io_read - Implementation of read() syscall. |
1da177e4 | 1594 | * |
fbefb1a8 MCC |
1595 | * @file: File structure. |
1596 | * @buf: Destination buffer. | |
1597 | * @count: Size of destination buffer. | |
1598 | * @ppos: Position in file (ignored). | |
1da177e4 | 1599 | * |
46e42a30 | 1600 | * return: Number of bytes read, or <0 on error. |
1da177e4 | 1601 | */ |
8ec6107a JJ |
1602 | static ssize_t dvb_ca_en50221_io_read(struct file *file, char __user *buf, |
1603 | size_t count, loff_t *ppos) | |
1da177e4 | 1604 | { |
0c53c70f JS |
1605 | struct dvb_device *dvbdev = file->private_data; |
1606 | struct dvb_ca_private *ca = dvbdev->priv; | |
a75aa90c | 1607 | struct dvb_ca_slot *sl; |
1da177e4 LT |
1608 | int status; |
1609 | int result = 0; | |
1610 | u8 hdr[2]; | |
1611 | int slot; | |
1612 | int connection_id = -1; | |
1613 | size_t idx, idx2; | |
1614 | int last_fragment = 0; | |
1615 | size_t fraglen; | |
1616 | int pktlen; | |
1617 | int dispose = 0; | |
1618 | ||
46b4f7c1 | 1619 | dprintk("%s\n", __func__); |
1da177e4 | 1620 | |
96375b7a JJ |
1621 | /* |
1622 | * Outgoing packet has a 2 byte header. | |
1623 | * hdr[0] = slot_id, hdr[1] = connection_id | |
1624 | */ | |
1da177e4 LT |
1625 | if (count < 2) |
1626 | return -EINVAL; | |
1627 | ||
1628 | /* wait for some data */ | |
bacba9e5 JJ |
1629 | status = dvb_ca_en50221_io_read_condition(ca, &result, &slot); |
1630 | if (status == 0) { | |
1da177e4 LT |
1631 | /* if we're in nonblocking mode, exit immediately */ |
1632 | if (file->f_flags & O_NONBLOCK) | |
1633 | return -EWOULDBLOCK; | |
1634 | ||
1635 | /* wait for some data */ | |
1636 | status = wait_event_interruptible(ca->wait_queue, | |
1637 | dvb_ca_en50221_io_read_condition | |
1638 | (ca, &result, &slot)); | |
1639 | } | |
1640 | if ((status < 0) || (result < 0)) { | |
1641 | if (result) | |
1642 | return result; | |
1643 | return status; | |
1644 | } | |
1645 | ||
a75aa90c JJ |
1646 | sl = &ca->slot_info[slot]; |
1647 | idx = dvb_ringbuffer_pkt_next(&sl->rx_buffer, -1, &fraglen); | |
1da177e4 LT |
1648 | pktlen = 2; |
1649 | do { | |
1650 | if (idx == -1) { | |
b3ad24d2 MCC |
1651 | pr_err("dvb_ca adapter %d: BUG: read packet ended before last_fragment encountered\n", |
1652 | ca->dvbdev->adapter->num); | |
1da177e4 LT |
1653 | status = -EIO; |
1654 | goto exit; | |
1655 | } | |
1656 | ||
a75aa90c | 1657 | dvb_ringbuffer_pkt_read(&sl->rx_buffer, idx, 0, hdr, 2); |
1da177e4 LT |
1658 | if (connection_id == -1) |
1659 | connection_id = hdr[0]; | |
1660 | if (hdr[0] == connection_id) { | |
1661 | if (pktlen < count) { | |
7bd8cc8f | 1662 | if ((pktlen + fraglen - 2) > count) |
1da177e4 | 1663 | fraglen = count - pktlen; |
7bd8cc8f | 1664 | else |
1da177e4 | 1665 | fraglen -= 2; |
1da177e4 | 1666 | |
a75aa90c JJ |
1667 | status = |
1668 | dvb_ringbuffer_pkt_read_user(&sl->rx_buffer, | |
1669 | idx, 2, | |
1670 | buf + pktlen, | |
1671 | fraglen); | |
1672 | if (status < 0) | |
1da177e4 | 1673 | goto exit; |
a75aa90c | 1674 | |
1da177e4 LT |
1675 | pktlen += fraglen; |
1676 | } | |
1677 | ||
1678 | if ((hdr[1] & 0x80) == 0) | |
1679 | last_fragment = 1; | |
1680 | dispose = 1; | |
1681 | } | |
1682 | ||
a75aa90c | 1683 | idx2 = dvb_ringbuffer_pkt_next(&sl->rx_buffer, idx, &fraglen); |
1da177e4 | 1684 | if (dispose) |
a75aa90c | 1685 | dvb_ringbuffer_pkt_dispose(&sl->rx_buffer, idx); |
1da177e4 LT |
1686 | idx = idx2; |
1687 | dispose = 0; | |
1688 | } while (!last_fragment); | |
1689 | ||
1690 | hdr[0] = slot; | |
1691 | hdr[1] = connection_id; | |
e252984c DC |
1692 | status = copy_to_user(buf, hdr, 2); |
1693 | if (status) { | |
1694 | status = -EFAULT; | |
1da177e4 | 1695 | goto exit; |
e252984c | 1696 | } |
1da177e4 LT |
1697 | status = pktlen; |
1698 | ||
ded92846 | 1699 | exit: |
1da177e4 LT |
1700 | return status; |
1701 | } | |
1702 | ||
1da177e4 | 1703 | /** |
a4184b4f | 1704 | * dvb_ca_en50221_io_open - Implementation of file open syscall. |
1da177e4 | 1705 | * |
fbefb1a8 MCC |
1706 | * @inode: Inode concerned. |
1707 | * @file: File concerned. | |
1da177e4 | 1708 | * |
46e42a30 | 1709 | * return: 0 on success, <0 on failure. |
1da177e4 LT |
1710 | */ |
1711 | static int dvb_ca_en50221_io_open(struct inode *inode, struct file *file) | |
1712 | { | |
0c53c70f JS |
1713 | struct dvb_device *dvbdev = file->private_data; |
1714 | struct dvb_ca_private *ca = dvbdev->priv; | |
1da177e4 LT |
1715 | int err; |
1716 | int i; | |
1717 | ||
46b4f7c1 | 1718 | dprintk("%s\n", __func__); |
1da177e4 | 1719 | |
280a8ab8 HK |
1720 | mutex_lock(&ca->remove_mutex); |
1721 | ||
1722 | if (ca->exit) { | |
1723 | mutex_unlock(&ca->remove_mutex); | |
1724 | return -ENODEV; | |
1725 | } | |
1726 | ||
1727 | if (!try_module_get(ca->pub->owner)) { | |
1728 | mutex_unlock(&ca->remove_mutex); | |
1da177e4 | 1729 | return -EIO; |
280a8ab8 | 1730 | } |
1da177e4 LT |
1731 | |
1732 | err = dvb_generic_open(inode, file); | |
226835d7 MS |
1733 | if (err < 0) { |
1734 | module_put(ca->pub->owner); | |
280a8ab8 | 1735 | mutex_unlock(&ca->remove_mutex); |
1da177e4 | 1736 | return err; |
226835d7 | 1737 | } |
1da177e4 LT |
1738 | |
1739 | for (i = 0; i < ca->slot_count; i++) { | |
a75aa90c | 1740 | struct dvb_ca_slot *sl = &ca->slot_info[i]; |
1da177e4 | 1741 | |
a75aa90c JJ |
1742 | if (sl->slot_state == DVB_CA_SLOTSTATE_RUNNING) { |
1743 | if (!sl->rx_buffer.data) { | |
a1ca23d1 JJ |
1744 | /* |
1745 | * it is safe to call this here without locks | |
1746 | * because ca->open == 0. Data is not read in | |
1747 | * this case | |
1748 | */ | |
a75aa90c | 1749 | dvb_ringbuffer_flush(&sl->rx_buffer); |
1da177e4 | 1750 | } |
1da177e4 LT |
1751 | } |
1752 | } | |
1753 | ||
1754 | ca->open = 1; | |
1755 | dvb_ca_en50221_thread_update_delay(ca); | |
1756 | dvb_ca_en50221_thread_wakeup(ca); | |
1757 | ||
da677fe1 MK |
1758 | dvb_ca_private_get(ca); |
1759 | ||
280a8ab8 | 1760 | mutex_unlock(&ca->remove_mutex); |
1da177e4 LT |
1761 | return 0; |
1762 | } | |
1763 | ||
1da177e4 | 1764 | /** |
a4184b4f | 1765 | * dvb_ca_en50221_io_release - Implementation of file close syscall. |
1da177e4 | 1766 | * |
fbefb1a8 MCC |
1767 | * @inode: Inode concerned. |
1768 | * @file: File concerned. | |
1da177e4 | 1769 | * |
46e42a30 | 1770 | * return: 0 on success, <0 on failure. |
1da177e4 LT |
1771 | */ |
1772 | static int dvb_ca_en50221_io_release(struct inode *inode, struct file *file) | |
1773 | { | |
0c53c70f JS |
1774 | struct dvb_device *dvbdev = file->private_data; |
1775 | struct dvb_ca_private *ca = dvbdev->priv; | |
0c12c1bf | 1776 | int err; |
1da177e4 | 1777 | |
46b4f7c1 | 1778 | dprintk("%s\n", __func__); |
1da177e4 | 1779 | |
280a8ab8 HK |
1780 | mutex_lock(&ca->remove_mutex); |
1781 | ||
1da177e4 LT |
1782 | /* mark the CA device as closed */ |
1783 | ca->open = 0; | |
1784 | dvb_ca_en50221_thread_update_delay(ca); | |
1785 | ||
1786 | err = dvb_generic_release(inode, file); | |
1787 | ||
1788 | module_put(ca->pub->owner); | |
1789 | ||
da677fe1 MK |
1790 | dvb_ca_private_put(ca); |
1791 | ||
280a8ab8 HK |
1792 | if (dvbdev->users == 1 && ca->exit == 1) { |
1793 | mutex_unlock(&ca->remove_mutex); | |
1794 | wake_up(&dvbdev->wait_queue); | |
1795 | } else { | |
1796 | mutex_unlock(&ca->remove_mutex); | |
1797 | } | |
1798 | ||
0c12c1bf | 1799 | return err; |
1da177e4 LT |
1800 | } |
1801 | ||
1da177e4 | 1802 | /** |
a4184b4f | 1803 | * dvb_ca_en50221_io_poll - Implementation of poll() syscall. |
1da177e4 | 1804 | * |
fbefb1a8 MCC |
1805 | * @file: File concerned. |
1806 | * @wait: poll wait table. | |
1da177e4 | 1807 | * |
46e42a30 | 1808 | * return: Standard poll mask. |
1da177e4 | 1809 | */ |
c23e0cb8 | 1810 | static __poll_t dvb_ca_en50221_io_poll(struct file *file, poll_table *wait) |
1da177e4 | 1811 | { |
0c53c70f JS |
1812 | struct dvb_device *dvbdev = file->private_data; |
1813 | struct dvb_ca_private *ca = dvbdev->priv; | |
c23e0cb8 | 1814 | __poll_t mask = 0; |
1da177e4 LT |
1815 | int slot; |
1816 | int result = 0; | |
1817 | ||
46b4f7c1 | 1818 | dprintk("%s\n", __func__); |
1da177e4 | 1819 | |
c6f5c7c2 HV |
1820 | poll_wait(file, &ca->wait_queue, wait); |
1821 | ||
7bd8cc8f | 1822 | if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) |
a9a08845 | 1823 | mask |= EPOLLIN; |
1da177e4 LT |
1824 | |
1825 | /* if there is something, return now */ | |
1826 | if (mask) | |
1827 | return mask; | |
1828 | ||
7bd8cc8f | 1829 | if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) |
a9a08845 | 1830 | mask |= EPOLLIN; |
1da177e4 LT |
1831 | |
1832 | return mask; | |
1833 | } | |
1da177e4 | 1834 | |
784e29d2 | 1835 | static const struct file_operations dvb_ca_fops = { |
1da177e4 LT |
1836 | .owner = THIS_MODULE, |
1837 | .read = dvb_ca_en50221_io_read, | |
1838 | .write = dvb_ca_en50221_io_write, | |
16ef8def | 1839 | .unlocked_ioctl = dvb_ca_en50221_io_ioctl, |
1da177e4 LT |
1840 | .open = dvb_ca_en50221_io_open, |
1841 | .release = dvb_ca_en50221_io_release, | |
1842 | .poll = dvb_ca_en50221_io_poll, | |
6038f373 | 1843 | .llseek = noop_llseek, |
1da177e4 LT |
1844 | }; |
1845 | ||
738a1b1e | 1846 | static const struct dvb_device dvbdev_ca = { |
1da177e4 LT |
1847 | .priv = NULL, |
1848 | .users = 1, | |
1849 | .readers = 1, | |
1850 | .writers = 1, | |
738a1b1e | 1851 | #if defined(CONFIG_MEDIA_CONTROLLER_DVB) |
e4fd3bc5 | 1852 | .name = "dvb-ca-en50221", |
738a1b1e | 1853 | #endif |
1da177e4 LT |
1854 | .fops = &dvb_ca_fops, |
1855 | }; | |
1856 | ||
96375b7a | 1857 | /* ************************************************************************** */ |
1da177e4 LT |
1858 | /* Initialisation/shutdown functions */ |
1859 | ||
1da177e4 | 1860 | /** |
a4184b4f | 1861 | * dvb_ca_en50221_init - Initialise a new DVB CA EN50221 interface device. |
1da177e4 | 1862 | * |
fbefb1a8 | 1863 | * @dvb_adapter: DVB adapter to attach the new CA device to. |
46e42a30 | 1864 | * @pubca: The dvb_ca instance. |
fbefb1a8 MCC |
1865 | * @flags: Flags describing the CA device (DVB_CA_FLAG_*). |
1866 | * @slot_count: Number of slots supported. | |
1da177e4 | 1867 | * |
46e42a30 | 1868 | * return: 0 on success, nonzero on failure |
1da177e4 LT |
1869 | */ |
1870 | int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter, | |
1871 | struct dvb_ca_en50221 *pubca, int flags, int slot_count) | |
1872 | { | |
1873 | int ret; | |
1874 | struct dvb_ca_private *ca = NULL; | |
1875 | int i; | |
1876 | ||
46b4f7c1 | 1877 | dprintk("%s\n", __func__); |
1da177e4 LT |
1878 | |
1879 | if (slot_count < 1) | |
1880 | return -EINVAL; | |
1881 | ||
1882 | /* initialise the system data */ | |
bacba9e5 JJ |
1883 | ca = kzalloc(sizeof(*ca), GFP_KERNEL); |
1884 | if (!ca) { | |
1da177e4 | 1885 | ret = -ENOMEM; |
a2bbf5d0 | 1886 | goto exit; |
1da177e4 | 1887 | } |
da677fe1 | 1888 | kref_init(&ca->refcount); |
1da177e4 LT |
1889 | ca->pub = pubca; |
1890 | ca->flags = flags; | |
1891 | ca->slot_count = slot_count; | |
bacba9e5 JJ |
1892 | ca->slot_info = kcalloc(slot_count, sizeof(struct dvb_ca_slot), |
1893 | GFP_KERNEL); | |
1894 | if (!ca->slot_info) { | |
1da177e4 | 1895 | ret = -ENOMEM; |
a2bbf5d0 | 1896 | goto free_ca; |
1da177e4 | 1897 | } |
1da177e4 | 1898 | init_waitqueue_head(&ca->wait_queue); |
1da177e4 LT |
1899 | ca->open = 0; |
1900 | ca->wakeup = 0; | |
1901 | ca->next_read_slot = 0; | |
1902 | pubca->private = ca; | |
1903 | ||
1904 | /* register the DVB device */ | |
96375b7a JJ |
1905 | ret = dvb_register_device(dvb_adapter, &ca->dvbdev, &dvbdev_ca, ca, |
1906 | DVB_DEVICE_CA, 0); | |
1da177e4 | 1907 | if (ret) |
a2bbf5d0 | 1908 | goto free_slot_info; |
1da177e4 LT |
1909 | |
1910 | /* now initialise each slot */ | |
1911 | for (i = 0; i < slot_count; i++) { | |
a75aa90c JJ |
1912 | struct dvb_ca_slot *sl = &ca->slot_info[i]; |
1913 | ||
1914 | memset(sl, 0, sizeof(struct dvb_ca_slot)); | |
1915 | sl->slot_state = DVB_CA_SLOTSTATE_NONE; | |
1916 | atomic_set(&sl->camchange_count, 0); | |
1917 | sl->camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; | |
1918 | mutex_init(&sl->slot_lock); | |
1da177e4 LT |
1919 | } |
1920 | ||
30ad64b8 | 1921 | mutex_init(&ca->ioctl_mutex); |
280a8ab8 | 1922 | mutex_init(&ca->remove_mutex); |
30ad64b8 | 1923 | |
1da177e4 LT |
1924 | if (signal_pending(current)) { |
1925 | ret = -EINTR; | |
a2bbf5d0 | 1926 | goto unregister_device; |
1da177e4 LT |
1927 | } |
1928 | mb(); | |
1929 | ||
1930 | /* create a kthread for monitoring this CA device */ | |
9320874a CH |
1931 | ca->thread = kthread_run(dvb_ca_en50221_thread, ca, "kdvb-ca-%i:%i", |
1932 | ca->dvbdev->adapter->num, ca->dvbdev->id); | |
1933 | if (IS_ERR(ca->thread)) { | |
1934 | ret = PTR_ERR(ca->thread); | |
b3ad24d2 MCC |
1935 | pr_err("dvb_ca_init: failed to start kernel_thread (%d)\n", |
1936 | ret); | |
a2bbf5d0 | 1937 | goto unregister_device; |
1da177e4 | 1938 | } |
1da177e4 LT |
1939 | return 0; |
1940 | ||
a2bbf5d0 ME |
1941 | unregister_device: |
1942 | dvb_unregister_device(ca->dvbdev); | |
1943 | free_slot_info: | |
1944 | kfree(ca->slot_info); | |
1945 | free_ca: | |
1946 | kfree(ca); | |
1947 | exit: | |
1da177e4 LT |
1948 | pubca->private = NULL; |
1949 | return ret; | |
1950 | } | |
82ec19e4 | 1951 | EXPORT_SYMBOL(dvb_ca_en50221_init); |
1da177e4 | 1952 | |
1da177e4 | 1953 | /** |
a4184b4f | 1954 | * dvb_ca_en50221_release - Release a DVB CA EN50221 interface device. |
1da177e4 | 1955 | * |
46e42a30 | 1956 | * @pubca: The associated dvb_ca instance. |
1da177e4 LT |
1957 | */ |
1958 | void dvb_ca_en50221_release(struct dvb_ca_en50221 *pubca) | |
1959 | { | |
0c53c70f | 1960 | struct dvb_ca_private *ca = pubca->private; |
1da177e4 LT |
1961 | int i; |
1962 | ||
46b4f7c1 | 1963 | dprintk("%s\n", __func__); |
1da177e4 | 1964 | |
280a8ab8 HK |
1965 | mutex_lock(&ca->remove_mutex); |
1966 | ca->exit = 1; | |
1967 | mutex_unlock(&ca->remove_mutex); | |
1968 | ||
1969 | if (ca->dvbdev->users < 1) | |
1970 | wait_event(ca->dvbdev->wait_queue, | |
1971 | ca->dvbdev->users == 1); | |
1972 | ||
1da177e4 | 1973 | /* shutdown the thread if there was one */ |
9320874a | 1974 | kthread_stop(ca->thread); |
1da177e4 | 1975 | |
7bd8cc8f | 1976 | for (i = 0; i < ca->slot_count; i++) |
1da177e4 | 1977 | dvb_ca_en50221_slot_shutdown(ca, i); |
7bd8cc8f | 1978 | |
4d5030b6 | 1979 | dvb_remove_device(ca->dvbdev); |
da677fe1 | 1980 | dvb_ca_private_put(ca); |
1da177e4 LT |
1981 | pubca->private = NULL; |
1982 | } | |
82ec19e4 | 1983 | EXPORT_SYMBOL(dvb_ca_en50221_release); |