Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * dvb_ca.c: generic DVB functions for EN50221 CAM interfaces |
| 3 | * |
| 4 | * Copyright (C) 2004 Andrew de Quincey |
| 5 | * |
| 6 | * Parts of this file were based on sources as follows: |
| 7 | * |
| 8 | * Copyright (C) 2003 Ralph Metzler <rjkm@metzlerbros.de> |
| 9 | * |
| 10 | * based on code: |
| 11 | * |
| 12 | * Copyright (C) 1999-2002 Ralph Metzler |
| 13 | * & Marcus Metzler for convergence integrated media GmbH |
| 14 | * |
| 15 | * This program is free software; you can redistribute it and/or |
| 16 | * modify it under the terms of the GNU General Public License |
| 17 | * as published by the Free Software Foundation; either version 2 |
| 18 | * of the License, or (at your option) any later version. |
| 19 | * |
| 20 | * This program is distributed in the hope that it will be useful, |
| 21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 23 | * GNU General Public License for more details. |
| 24 | * |
| 25 | * You should have received a copy of the GNU General Public License |
| 26 | * along with this program; if not, write to the Free Software |
| 27 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 28 | * Or, point your browser to http://www.gnu.org/copyleft/gpl.html |
| 29 | */ |
| 30 | |
| 31 | #include <linux/errno.h> |
| 32 | #include <linux/slab.h> |
| 33 | #include <linux/list.h> |
| 34 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/vmalloc.h> |
| 36 | #include <linux/delay.h> |
Andrew de Quincey | ded9284 | 2005-12-01 00:51:49 -0800 | [diff] [blame] | 37 | #include <linux/spinlock.h> |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 38 | #include <linux/sched.h> |
Christoph Hellwig | 9320874 | 2007-10-03 11:23:01 -0300 | [diff] [blame] | 39 | #include <linux/kthread.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | #include "dvb_ca_en50221.h" |
| 42 | #include "dvb_ringbuffer.h" |
| 43 | |
| 44 | static int dvb_ca_en50221_debug; |
| 45 | |
| 46 | module_param_named(cam_debug, dvb_ca_en50221_debug, int, 0644); |
| 47 | MODULE_PARM_DESC(cam_debug, "enable verbose debug messages"); |
| 48 | |
| 49 | #define dprintk if (dvb_ca_en50221_debug) printk |
| 50 | |
Dominique Dumont | 50b447d | 2005-09-09 13:02:27 -0700 | [diff] [blame] | 51 | #define INIT_TIMEOUT_SECS 10 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
| 53 | #define HOST_LINK_BUF_SIZE 0x200 |
| 54 | |
| 55 | #define RX_BUFFER_SIZE 65535 |
| 56 | |
| 57 | #define MAX_RX_PACKETS_PER_ITERATION 10 |
| 58 | |
| 59 | #define CTRLIF_DATA 0 |
| 60 | #define CTRLIF_COMMAND 1 |
| 61 | #define CTRLIF_STATUS 1 |
| 62 | #define CTRLIF_SIZE_LOW 2 |
| 63 | #define CTRLIF_SIZE_HIGH 3 |
| 64 | |
| 65 | #define CMDREG_HC 1 /* Host control */ |
| 66 | #define CMDREG_SW 2 /* Size write */ |
| 67 | #define CMDREG_SR 4 /* Size read */ |
| 68 | #define CMDREG_RS 8 /* Reset interface */ |
| 69 | #define CMDREG_FRIE 0x40 /* Enable FR interrupt */ |
| 70 | #define CMDREG_DAIE 0x80 /* Enable DA interrupt */ |
| 71 | #define IRQEN (CMDREG_DAIE) |
| 72 | |
| 73 | #define STATUSREG_RE 1 /* read error */ |
| 74 | #define STATUSREG_WE 2 /* write error */ |
| 75 | #define STATUSREG_FR 0x40 /* module free */ |
| 76 | #define STATUSREG_DA 0x80 /* data available */ |
| 77 | #define STATUSREG_TXERR (STATUSREG_RE|STATUSREG_WE) /* general transfer error */ |
| 78 | |
| 79 | |
| 80 | #define DVB_CA_SLOTSTATE_NONE 0 |
| 81 | #define DVB_CA_SLOTSTATE_UNINITIALISED 1 |
| 82 | #define DVB_CA_SLOTSTATE_RUNNING 2 |
| 83 | #define DVB_CA_SLOTSTATE_INVALID 3 |
| 84 | #define DVB_CA_SLOTSTATE_WAITREADY 4 |
| 85 | #define DVB_CA_SLOTSTATE_VALIDATE 5 |
| 86 | #define DVB_CA_SLOTSTATE_WAITFR 6 |
| 87 | #define DVB_CA_SLOTSTATE_LINKINIT 7 |
| 88 | |
| 89 | |
| 90 | /* Information on a CA slot */ |
| 91 | struct dvb_ca_slot { |
| 92 | |
| 93 | /* current state of the CAM */ |
| 94 | int slot_state; |
| 95 | |
Matthias Dahl | d7e4384 | 2008-09-26 06:29:03 -0300 | [diff] [blame] | 96 | /* mutex used for serializing access to one CI slot */ |
| 97 | struct mutex slot_lock; |
| 98 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | /* Number of CAMCHANGES that have occurred since last processing */ |
| 100 | atomic_t camchange_count; |
| 101 | |
| 102 | /* Type of last CAMCHANGE */ |
| 103 | int camchange_type; |
| 104 | |
| 105 | /* base address of CAM config */ |
| 106 | u32 config_base; |
| 107 | |
| 108 | /* value to write into Config Control register */ |
| 109 | u8 config_option; |
| 110 | |
| 111 | /* if 1, the CAM supports DA IRQs */ |
| 112 | u8 da_irq_supported:1; |
| 113 | |
| 114 | /* size of the buffer to use when talking to the CAM */ |
| 115 | int link_buf_size; |
| 116 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | /* buffer for incoming packets */ |
| 118 | struct dvb_ringbuffer rx_buffer; |
| 119 | |
| 120 | /* timer used during various states of the slot */ |
| 121 | unsigned long timeout; |
| 122 | }; |
| 123 | |
| 124 | /* Private CA-interface information */ |
| 125 | struct dvb_ca_private { |
| 126 | |
| 127 | /* pointer back to the public data structure */ |
| 128 | struct dvb_ca_en50221 *pub; |
| 129 | |
| 130 | /* the DVB device */ |
| 131 | struct dvb_device *dvbdev; |
| 132 | |
| 133 | /* Flags describing the interface (DVB_CA_FLAG_*) */ |
| 134 | u32 flags; |
| 135 | |
| 136 | /* number of slots supported by this CA interface */ |
| 137 | unsigned int slot_count; |
| 138 | |
| 139 | /* information on each slot */ |
| 140 | struct dvb_ca_slot *slot_info; |
| 141 | |
| 142 | /* wait queues for read() and write() operations */ |
| 143 | wait_queue_head_t wait_queue; |
| 144 | |
| 145 | /* PID of the monitoring thread */ |
Christoph Hellwig | 9320874 | 2007-10-03 11:23:01 -0300 | [diff] [blame] | 146 | struct task_struct *thread; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
| 148 | /* Flag indicating if the CA device is open */ |
| 149 | unsigned int open:1; |
| 150 | |
| 151 | /* Flag indicating the thread should wake up now */ |
| 152 | unsigned int wakeup:1; |
| 153 | |
| 154 | /* Delay the main thread should use */ |
| 155 | unsigned long delay; |
| 156 | |
| 157 | /* Slot to start looking for data to read from in the next user-space read operation */ |
| 158 | int next_read_slot; |
Nikolaus Schulz | 30ad64b | 2012-12-23 18:49:07 -0300 | [diff] [blame] | 159 | |
| 160 | /* mutex serializing ioctls */ |
| 161 | struct mutex ioctl_mutex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | }; |
| 163 | |
| 164 | static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca); |
| 165 | static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, u8 * ebuf, int ecount); |
| 166 | static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, u8 * ebuf, int ecount); |
| 167 | |
| 168 | |
| 169 | /** |
| 170 | * Safely find needle in haystack. |
| 171 | * |
| 172 | * @param haystack Buffer to look in. |
| 173 | * @param hlen Number of bytes in haystack. |
| 174 | * @param needle Buffer to find. |
| 175 | * @param nlen Number of bytes in needle. |
| 176 | * @return Pointer into haystack needle was found at, or NULL if not found. |
| 177 | */ |
Oliver Endriss | 260f8d7 | 2007-07-13 11:54:35 -0300 | [diff] [blame] | 178 | static char *findstr(char * haystack, int hlen, char * needle, int nlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | { |
| 180 | int i; |
| 181 | |
| 182 | if (hlen < nlen) |
| 183 | return NULL; |
| 184 | |
| 185 | for (i = 0; i <= hlen - nlen; i++) { |
| 186 | if (!strncmp(haystack + i, needle, nlen)) |
| 187 | return haystack + i; |
| 188 | } |
| 189 | |
| 190 | return NULL; |
| 191 | } |
| 192 | |
| 193 | |
| 194 | |
| 195 | /* ******************************************************************************** */ |
| 196 | /* EN50221 physical interface functions */ |
| 197 | |
| 198 | |
| 199 | /** |
| 200 | * Check CAM status. |
| 201 | */ |
| 202 | static int dvb_ca_en50221_check_camstatus(struct dvb_ca_private *ca, int slot) |
| 203 | { |
| 204 | int slot_status; |
| 205 | int cam_present_now; |
| 206 | int cam_changed; |
| 207 | |
| 208 | /* IRQ mode */ |
| 209 | if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE) { |
| 210 | return (atomic_read(&ca->slot_info[slot].camchange_count) != 0); |
| 211 | } |
| 212 | |
| 213 | /* poll mode */ |
| 214 | slot_status = ca->pub->poll_slot_status(ca->pub, slot, ca->open); |
| 215 | |
| 216 | cam_present_now = (slot_status & DVB_CA_EN50221_POLL_CAM_PRESENT) ? 1 : 0; |
| 217 | cam_changed = (slot_status & DVB_CA_EN50221_POLL_CAM_CHANGED) ? 1 : 0; |
| 218 | if (!cam_changed) { |
| 219 | int cam_present_old = (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_NONE); |
| 220 | cam_changed = (cam_present_now != cam_present_old); |
| 221 | } |
| 222 | |
| 223 | if (cam_changed) { |
| 224 | if (!cam_present_now) { |
| 225 | ca->slot_info[slot].camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; |
| 226 | } else { |
| 227 | ca->slot_info[slot].camchange_type = DVB_CA_EN50221_CAMCHANGE_INSERTED; |
| 228 | } |
| 229 | atomic_set(&ca->slot_info[slot].camchange_count, 1); |
| 230 | } else { |
| 231 | if ((ca->slot_info[slot].slot_state == DVB_CA_SLOTSTATE_WAITREADY) && |
| 232 | (slot_status & DVB_CA_EN50221_POLL_CAM_READY)) { |
| 233 | // move to validate state if reset is completed |
| 234 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_VALIDATE; |
| 235 | } |
| 236 | } |
| 237 | |
| 238 | return cam_changed; |
| 239 | } |
| 240 | |
| 241 | |
| 242 | /** |
| 243 | * Wait for flags to become set on the STATUS register on a CAM interface, |
| 244 | * checking for errors and timeout. |
| 245 | * |
| 246 | * @param ca CA instance. |
| 247 | * @param slot Slot on interface. |
| 248 | * @param waitfor Flags to wait for. |
| 249 | * @param timeout_ms Timeout in milliseconds. |
| 250 | * |
| 251 | * @return 0 on success, nonzero on error. |
| 252 | */ |
| 253 | static int dvb_ca_en50221_wait_if_status(struct dvb_ca_private *ca, int slot, |
| 254 | u8 waitfor, int timeout_hz) |
| 255 | { |
| 256 | unsigned long timeout; |
| 257 | unsigned long start; |
| 258 | |
Harvey Harrison | 46b4f7c | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 259 | dprintk("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | |
| 261 | /* loop until timeout elapsed */ |
| 262 | start = jiffies; |
| 263 | timeout = jiffies + timeout_hz; |
| 264 | while (1) { |
| 265 | /* read the status and check for error */ |
| 266 | int res = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
| 267 | if (res < 0) |
| 268 | return -EIO; |
| 269 | |
| 270 | /* if we got the flags, it was successful! */ |
| 271 | if (res & waitfor) { |
Harvey Harrison | 46b4f7c | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 272 | dprintk("%s succeeded timeout:%lu\n", __func__, jiffies - start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | return 0; |
| 274 | } |
| 275 | |
| 276 | /* check for timeout */ |
| 277 | if (time_after(jiffies, timeout)) { |
| 278 | break; |
| 279 | } |
| 280 | |
| 281 | /* wait for a bit */ |
| 282 | msleep(1); |
| 283 | } |
| 284 | |
Harvey Harrison | 46b4f7c | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 285 | dprintk("%s failed timeout:%lu\n", __func__, jiffies - start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | |
| 287 | /* if we get here, we've timed out */ |
| 288 | return -ETIMEDOUT; |
| 289 | } |
| 290 | |
| 291 | |
| 292 | /** |
| 293 | * Initialise the link layer connection to a CAM. |
| 294 | * |
| 295 | * @param ca CA instance. |
| 296 | * @param slot Slot id. |
| 297 | * |
| 298 | * @return 0 on success, nonzero on failure. |
| 299 | */ |
| 300 | static int dvb_ca_en50221_link_init(struct dvb_ca_private *ca, int slot) |
| 301 | { |
| 302 | int ret; |
| 303 | int buf_size; |
| 304 | u8 buf[2]; |
| 305 | |
Harvey Harrison | 46b4f7c | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 306 | dprintk("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | |
| 308 | /* we'll be determining these during this function */ |
| 309 | ca->slot_info[slot].da_irq_supported = 0; |
| 310 | |
| 311 | /* set the host link buffer size temporarily. it will be overwritten with the |
| 312 | * real negotiated size later. */ |
| 313 | ca->slot_info[slot].link_buf_size = 2; |
| 314 | |
| 315 | /* read the buffer size from the CAM */ |
| 316 | if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN | CMDREG_SR)) != 0) |
| 317 | return ret; |
| 318 | if ((ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_DA, HZ / 10)) != 0) |
| 319 | return ret; |
| 320 | if ((ret = dvb_ca_en50221_read_data(ca, slot, buf, 2)) != 2) |
| 321 | return -EIO; |
| 322 | if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN)) != 0) |
| 323 | return ret; |
| 324 | |
| 325 | /* store it, and choose the minimum of our buffer and the CAM's buffer size */ |
| 326 | buf_size = (buf[0] << 8) | buf[1]; |
| 327 | if (buf_size > HOST_LINK_BUF_SIZE) |
| 328 | buf_size = HOST_LINK_BUF_SIZE; |
| 329 | ca->slot_info[slot].link_buf_size = buf_size; |
| 330 | buf[0] = buf_size >> 8; |
| 331 | buf[1] = buf_size & 0xff; |
| 332 | dprintk("Chosen link buffer size of %i\n", buf_size); |
| 333 | |
| 334 | /* write the buffer size to the CAM */ |
| 335 | if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN | CMDREG_SW)) != 0) |
| 336 | return ret; |
| 337 | if ((ret = dvb_ca_en50221_wait_if_status(ca, slot, STATUSREG_FR, HZ / 10)) != 0) |
| 338 | return ret; |
| 339 | if ((ret = dvb_ca_en50221_write_data(ca, slot, buf, 2)) != 2) |
| 340 | return -EIO; |
| 341 | if ((ret = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN)) != 0) |
| 342 | return ret; |
| 343 | |
| 344 | /* success */ |
| 345 | return 0; |
| 346 | } |
| 347 | |
| 348 | /** |
| 349 | * Read a tuple from attribute memory. |
| 350 | * |
| 351 | * @param ca CA instance. |
| 352 | * @param slot Slot id. |
| 353 | * @param address Address to read from. Updated. |
| 354 | * @param tupleType Tuple id byte. Updated. |
| 355 | * @param tupleLength Tuple length. Updated. |
| 356 | * @param tuple Dest buffer for tuple (must be 256 bytes). Updated. |
| 357 | * |
| 358 | * @return 0 on success, nonzero on error. |
| 359 | */ |
| 360 | static int dvb_ca_en50221_read_tuple(struct dvb_ca_private *ca, int slot, |
| 361 | int *address, int *tupleType, int *tupleLength, u8 * tuple) |
| 362 | { |
| 363 | int i; |
| 364 | int _tupleType; |
| 365 | int _tupleLength; |
| 366 | int _address = *address; |
| 367 | |
| 368 | /* grab the next tuple length and type */ |
| 369 | if ((_tupleType = ca->pub->read_attribute_mem(ca->pub, slot, _address)) < 0) |
| 370 | return _tupleType; |
| 371 | if (_tupleType == 0xff) { |
| 372 | dprintk("END OF CHAIN TUPLE type:0x%x\n", _tupleType); |
| 373 | *address += 2; |
| 374 | *tupleType = _tupleType; |
| 375 | *tupleLength = 0; |
| 376 | return 0; |
| 377 | } |
| 378 | if ((_tupleLength = ca->pub->read_attribute_mem(ca->pub, slot, _address + 2)) < 0) |
| 379 | return _tupleLength; |
| 380 | _address += 4; |
| 381 | |
| 382 | dprintk("TUPLE type:0x%x length:%i\n", _tupleType, _tupleLength); |
| 383 | |
| 384 | /* read in the whole tuple */ |
| 385 | for (i = 0; i < _tupleLength; i++) { |
| 386 | tuple[i] = ca->pub->read_attribute_mem(ca->pub, slot, _address + (i * 2)); |
| 387 | dprintk(" 0x%02x: 0x%02x %c\n", |
| 388 | i, tuple[i] & 0xff, |
| 389 | ((tuple[i] > 31) && (tuple[i] < 127)) ? tuple[i] : '.'); |
| 390 | } |
| 391 | _address += (_tupleLength * 2); |
| 392 | |
| 393 | // success |
| 394 | *tupleType = _tupleType; |
| 395 | *tupleLength = _tupleLength; |
| 396 | *address = _address; |
| 397 | return 0; |
| 398 | } |
| 399 | |
| 400 | |
| 401 | /** |
| 402 | * Parse attribute memory of a CAM module, extracting Config register, and checking |
| 403 | * it is a DVB CAM module. |
| 404 | * |
| 405 | * @param ca CA instance. |
| 406 | * @param slot Slot id. |
| 407 | * |
| 408 | * @return 0 on success, <0 on failure. |
| 409 | */ |
| 410 | static int dvb_ca_en50221_parse_attributes(struct dvb_ca_private *ca, int slot) |
| 411 | { |
| 412 | int address = 0; |
| 413 | int tupleLength; |
| 414 | int tupleType; |
| 415 | u8 tuple[257]; |
| 416 | char *dvb_str; |
| 417 | int rasz; |
| 418 | int status; |
| 419 | int got_cftableentry = 0; |
| 420 | int end_chain = 0; |
| 421 | int i; |
| 422 | u16 manfid = 0; |
| 423 | u16 devid = 0; |
| 424 | |
| 425 | |
| 426 | // CISTPL_DEVICE_0A |
| 427 | if ((status = |
| 428 | dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, &tupleLength, tuple)) < 0) |
| 429 | return status; |
| 430 | if (tupleType != 0x1D) |
| 431 | return -EINVAL; |
| 432 | |
| 433 | |
| 434 | |
| 435 | // CISTPL_DEVICE_0C |
| 436 | if ((status = |
| 437 | dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, &tupleLength, tuple)) < 0) |
| 438 | return status; |
| 439 | if (tupleType != 0x1C) |
| 440 | return -EINVAL; |
| 441 | |
| 442 | |
| 443 | |
| 444 | // CISTPL_VERS_1 |
| 445 | if ((status = |
| 446 | dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, &tupleLength, tuple)) < 0) |
| 447 | return status; |
| 448 | if (tupleType != 0x15) |
| 449 | return -EINVAL; |
| 450 | |
| 451 | |
| 452 | |
| 453 | // CISTPL_MANFID |
| 454 | if ((status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, |
| 455 | &tupleLength, tuple)) < 0) |
| 456 | return status; |
| 457 | if (tupleType != 0x20) |
| 458 | return -EINVAL; |
| 459 | if (tupleLength != 4) |
| 460 | return -EINVAL; |
| 461 | manfid = (tuple[1] << 8) | tuple[0]; |
| 462 | devid = (tuple[3] << 8) | tuple[2]; |
| 463 | |
| 464 | |
| 465 | |
| 466 | // CISTPL_CONFIG |
| 467 | if ((status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, |
| 468 | &tupleLength, tuple)) < 0) |
| 469 | return status; |
| 470 | if (tupleType != 0x1A) |
| 471 | return -EINVAL; |
| 472 | if (tupleLength < 3) |
| 473 | return -EINVAL; |
| 474 | |
| 475 | /* extract the configbase */ |
| 476 | rasz = tuple[0] & 3; |
| 477 | if (tupleLength < (3 + rasz + 14)) |
| 478 | return -EINVAL; |
| 479 | ca->slot_info[slot].config_base = 0; |
| 480 | for (i = 0; i < rasz + 1; i++) { |
| 481 | ca->slot_info[slot].config_base |= (tuple[2 + i] << (8 * i)); |
| 482 | } |
| 483 | |
| 484 | /* check it contains the correct DVB string */ |
Oliver Endriss | 260f8d7 | 2007-07-13 11:54:35 -0300 | [diff] [blame] | 485 | dvb_str = findstr((char *)tuple, tupleLength, "DVB_CI_V", 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | if (dvb_str == NULL) |
| 487 | return -EINVAL; |
| 488 | if (tupleLength < ((dvb_str - (char *) tuple) + 12)) |
| 489 | return -EINVAL; |
| 490 | |
| 491 | /* is it a version we support? */ |
| 492 | if (strncmp(dvb_str + 8, "1.00", 4)) { |
| 493 | printk("dvb_ca adapter %d: Unsupported DVB CAM module version %c%c%c%c\n", |
| 494 | ca->dvbdev->adapter->num, dvb_str[8], dvb_str[9], dvb_str[10], dvb_str[11]); |
| 495 | return -EINVAL; |
| 496 | } |
| 497 | |
| 498 | /* process the CFTABLE_ENTRY tuples, and any after those */ |
| 499 | while ((!end_chain) && (address < 0x1000)) { |
| 500 | if ((status = dvb_ca_en50221_read_tuple(ca, slot, &address, &tupleType, |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 501 | &tupleLength, tuple)) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | return status; |
| 503 | switch (tupleType) { |
| 504 | case 0x1B: // CISTPL_CFTABLE_ENTRY |
| 505 | if (tupleLength < (2 + 11 + 17)) |
| 506 | break; |
| 507 | |
| 508 | /* if we've already parsed one, just use it */ |
| 509 | if (got_cftableentry) |
| 510 | break; |
| 511 | |
| 512 | /* get the config option */ |
| 513 | ca->slot_info[slot].config_option = tuple[0] & 0x3f; |
| 514 | |
| 515 | /* OK, check it contains the correct strings */ |
Oliver Endriss | 260f8d7 | 2007-07-13 11:54:35 -0300 | [diff] [blame] | 516 | if ((findstr((char *)tuple, tupleLength, "DVB_HOST", 8) == NULL) || |
| 517 | (findstr((char *)tuple, tupleLength, "DVB_CI_MODULE", 13) == NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | break; |
| 519 | |
| 520 | got_cftableentry = 1; |
| 521 | break; |
| 522 | |
| 523 | case 0x14: // CISTPL_NO_LINK |
| 524 | break; |
| 525 | |
| 526 | case 0xFF: // CISTPL_END |
| 527 | end_chain = 1; |
| 528 | break; |
| 529 | |
| 530 | default: /* Unknown tuple type - just skip this tuple and move to the next one */ |
| 531 | dprintk("dvb_ca: Skipping unknown tuple type:0x%x length:0x%x\n", tupleType, |
| 532 | tupleLength); |
| 533 | break; |
| 534 | } |
| 535 | } |
| 536 | |
| 537 | if ((address > 0x1000) || (!got_cftableentry)) |
| 538 | return -EINVAL; |
| 539 | |
| 540 | dprintk("Valid DVB CAM detected MANID:%x DEVID:%x CONFIGBASE:0x%x CONFIGOPTION:0x%x\n", |
| 541 | manfid, devid, ca->slot_info[slot].config_base, ca->slot_info[slot].config_option); |
| 542 | |
| 543 | // success! |
| 544 | return 0; |
| 545 | } |
| 546 | |
| 547 | |
| 548 | /** |
| 549 | * Set CAM's configoption correctly. |
| 550 | * |
| 551 | * @param ca CA instance. |
| 552 | * @param slot Slot containing the CAM. |
| 553 | */ |
| 554 | static int dvb_ca_en50221_set_configoption(struct dvb_ca_private *ca, int slot) |
| 555 | { |
| 556 | int configoption; |
| 557 | |
Harvey Harrison | 46b4f7c | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 558 | dprintk("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | |
| 560 | /* set the config option */ |
| 561 | ca->pub->write_attribute_mem(ca->pub, slot, |
| 562 | ca->slot_info[slot].config_base, |
| 563 | ca->slot_info[slot].config_option); |
| 564 | |
| 565 | /* check it */ |
| 566 | configoption = ca->pub->read_attribute_mem(ca->pub, slot, ca->slot_info[slot].config_base); |
| 567 | dprintk("Set configoption 0x%x, read configoption 0x%x\n", |
| 568 | ca->slot_info[slot].config_option, configoption & 0x3f); |
| 569 | |
| 570 | /* fine! */ |
| 571 | return 0; |
| 572 | |
| 573 | } |
| 574 | |
| 575 | |
| 576 | /** |
| 577 | * This function talks to an EN50221 CAM control interface. It reads a buffer of |
| 578 | * data from the CAM. The data can either be stored in a supplied buffer, or |
| 579 | * automatically be added to the slot's rx_buffer. |
| 580 | * |
| 581 | * @param ca CA instance. |
| 582 | * @param slot Slot to read from. |
| 583 | * @param ebuf If non-NULL, the data will be written to this buffer. If NULL, |
| 584 | * the data will be added into the buffering system as a normal fragment. |
| 585 | * @param ecount Size of ebuf. Ignored if ebuf is NULL. |
| 586 | * |
| 587 | * @return Number of bytes read, or < 0 on error |
| 588 | */ |
| 589 | static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, u8 * ebuf, int ecount) |
| 590 | { |
| 591 | int bytes_read; |
| 592 | int status; |
| 593 | u8 buf[HOST_LINK_BUF_SIZE]; |
| 594 | int i; |
| 595 | |
Harvey Harrison | 46b4f7c | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 596 | dprintk("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | |
| 598 | /* check if we have space for a link buf in the rx_buffer */ |
| 599 | if (ebuf == NULL) { |
| 600 | int buf_free; |
| 601 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | if (ca->slot_info[slot].rx_buffer.data == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | status = -EIO; |
| 604 | goto exit; |
| 605 | } |
| 606 | buf_free = dvb_ringbuffer_free(&ca->slot_info[slot].rx_buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | |
| 608 | if (buf_free < (ca->slot_info[slot].link_buf_size + DVB_RINGBUFFER_PKTHDRSIZE)) { |
| 609 | status = -EAGAIN; |
| 610 | goto exit; |
| 611 | } |
| 612 | } |
| 613 | |
| 614 | /* check if there is data available */ |
| 615 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) |
| 616 | goto exit; |
| 617 | if (!(status & STATUSREG_DA)) { |
| 618 | /* no data */ |
| 619 | status = 0; |
| 620 | goto exit; |
| 621 | } |
| 622 | |
| 623 | /* read the amount of data */ |
| 624 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH)) < 0) |
| 625 | goto exit; |
| 626 | bytes_read = status << 8; |
| 627 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW)) < 0) |
| 628 | goto exit; |
| 629 | bytes_read |= status; |
| 630 | |
| 631 | /* check it will fit */ |
| 632 | if (ebuf == NULL) { |
| 633 | if (bytes_read > ca->slot_info[slot].link_buf_size) { |
| 634 | printk("dvb_ca adapter %d: CAM tried to send a buffer larger than the link buffer size (%i > %i)!\n", |
| 635 | ca->dvbdev->adapter->num, bytes_read, ca->slot_info[slot].link_buf_size); |
| 636 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; |
| 637 | status = -EIO; |
| 638 | goto exit; |
| 639 | } |
| 640 | if (bytes_read < 2) { |
| 641 | printk("dvb_ca adapter %d: CAM sent a buffer that was less than 2 bytes!\n", |
| 642 | ca->dvbdev->adapter->num); |
| 643 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; |
| 644 | status = -EIO; |
| 645 | goto exit; |
| 646 | } |
| 647 | } else { |
| 648 | if (bytes_read > ecount) { |
| 649 | printk("dvb_ca adapter %d: CAM tried to send a buffer larger than the ecount size!\n", |
| 650 | ca->dvbdev->adapter->num); |
| 651 | status = -EIO; |
| 652 | goto exit; |
| 653 | } |
| 654 | } |
| 655 | |
| 656 | /* fill the buffer */ |
| 657 | for (i = 0; i < bytes_read; i++) { |
| 658 | /* read byte and check */ |
| 659 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_DATA)) < 0) |
| 660 | goto exit; |
| 661 | |
| 662 | /* OK, store it in the buffer */ |
| 663 | buf[i] = status; |
| 664 | } |
| 665 | |
| 666 | /* check for read error (RE should now be 0) */ |
| 667 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) |
| 668 | goto exit; |
| 669 | if (status & STATUSREG_RE) { |
| 670 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; |
| 671 | status = -EIO; |
| 672 | goto exit; |
| 673 | } |
| 674 | |
| 675 | /* OK, add it to the receive buffer, or copy into external buffer if supplied */ |
| 676 | if (ebuf == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | if (ca->slot_info[slot].rx_buffer.data == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | status = -EIO; |
| 679 | goto exit; |
| 680 | } |
| 681 | dvb_ringbuffer_pkt_write(&ca->slot_info[slot].rx_buffer, buf, bytes_read); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | } else { |
| 683 | memcpy(ebuf, buf, bytes_read); |
| 684 | } |
| 685 | |
| 686 | dprintk("Received CA packet for slot %i connection id 0x%x last_frag:%i size:0x%x\n", slot, |
| 687 | buf[0], (buf[1] & 0x80) == 0, bytes_read); |
| 688 | |
| 689 | /* wake up readers when a last_fragment is received */ |
| 690 | if ((buf[1] & 0x80) == 0x00) { |
| 691 | wake_up_interruptible(&ca->wait_queue); |
| 692 | } |
| 693 | status = bytes_read; |
| 694 | |
| 695 | exit: |
| 696 | return status; |
| 697 | } |
| 698 | |
| 699 | |
| 700 | /** |
| 701 | * This function talks to an EN50221 CAM control interface. It writes a buffer of data |
| 702 | * to a CAM. |
| 703 | * |
| 704 | * @param ca CA instance. |
| 705 | * @param slot Slot to write to. |
| 706 | * @param ebuf The data in this buffer is treated as a complete link-level packet to |
| 707 | * be written. |
| 708 | * @param count Size of ebuf. |
| 709 | * |
| 710 | * @return Number of bytes written, or < 0 on error. |
| 711 | */ |
| 712 | static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, u8 * buf, int bytes_write) |
| 713 | { |
| 714 | int status; |
| 715 | int i; |
| 716 | |
Harvey Harrison | 46b4f7c | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 717 | dprintk("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | |
| 719 | |
Matthias Dahl | d7e4384 | 2008-09-26 06:29:03 -0300 | [diff] [blame] | 720 | /* sanity check */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | if (bytes_write > ca->slot_info[slot].link_buf_size) |
| 722 | return -EINVAL; |
| 723 | |
Matthias Dahl | d7e4384 | 2008-09-26 06:29:03 -0300 | [diff] [blame] | 724 | /* it is possible we are dealing with a single buffer implementation, |
| 725 | thus if there is data available for read or if there is even a read |
| 726 | already in progress, we do nothing but awake the kernel thread to |
| 727 | process the data if necessary. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) |
| 729 | goto exitnowrite; |
| 730 | if (status & (STATUSREG_DA | STATUSREG_RE)) { |
Matthias Dahl | d7e4384 | 2008-09-26 06:29:03 -0300 | [diff] [blame] | 731 | if (status & STATUSREG_DA) |
| 732 | dvb_ca_en50221_thread_wakeup(ca); |
| 733 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | status = -EAGAIN; |
| 735 | goto exitnowrite; |
| 736 | } |
| 737 | |
| 738 | /* OK, set HC bit */ |
| 739 | if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, |
| 740 | IRQEN | CMDREG_HC)) != 0) |
| 741 | goto exit; |
| 742 | |
| 743 | /* check if interface is still free */ |
| 744 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) |
| 745 | goto exit; |
| 746 | if (!(status & STATUSREG_FR)) { |
| 747 | /* it wasn't free => try again later */ |
| 748 | status = -EAGAIN; |
| 749 | goto exit; |
| 750 | } |
| 751 | |
| 752 | /* send the amount of data */ |
| 753 | if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH, bytes_write >> 8)) != 0) |
| 754 | goto exit; |
| 755 | if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW, |
| 756 | bytes_write & 0xff)) != 0) |
| 757 | goto exit; |
| 758 | |
| 759 | /* send the buffer */ |
| 760 | for (i = 0; i < bytes_write; i++) { |
| 761 | if ((status = ca->pub->write_cam_control(ca->pub, slot, CTRLIF_DATA, buf[i])) != 0) |
| 762 | goto exit; |
| 763 | } |
| 764 | |
| 765 | /* check for write error (WE should now be 0) */ |
| 766 | if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) |
| 767 | goto exit; |
| 768 | if (status & STATUSREG_WE) { |
| 769 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; |
| 770 | status = -EIO; |
| 771 | goto exit; |
| 772 | } |
| 773 | status = bytes_write; |
| 774 | |
| 775 | dprintk("Wrote CA packet for slot %i, connection id 0x%x last_frag:%i size:0x%x\n", slot, |
| 776 | buf[0], (buf[1] & 0x80) == 0, bytes_write); |
| 777 | |
| 778 | exit: |
| 779 | ca->pub->write_cam_control(ca->pub, slot, CTRLIF_COMMAND, IRQEN); |
| 780 | |
| 781 | exitnowrite: |
| 782 | return status; |
| 783 | } |
| 784 | EXPORT_SYMBOL(dvb_ca_en50221_camchange_irq); |
| 785 | |
| 786 | |
| 787 | |
| 788 | /* ******************************************************************************** */ |
| 789 | /* EN50221 higher level functions */ |
| 790 | |
| 791 | |
| 792 | /** |
| 793 | * A CAM has been removed => shut it down. |
| 794 | * |
| 795 | * @param ca CA instance. |
| 796 | * @param slot Slot to shut down. |
| 797 | */ |
| 798 | static int dvb_ca_en50221_slot_shutdown(struct dvb_ca_private *ca, int slot) |
| 799 | { |
Harvey Harrison | 46b4f7c | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 800 | dprintk("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | ca->pub->slot_shutdown(ca->pub, slot); |
| 803 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | |
| 805 | /* need to wake up all processes to check if they're now |
| 806 | trying to write to a defunct CAM */ |
| 807 | wake_up_interruptible(&ca->wait_queue); |
| 808 | |
| 809 | dprintk("Slot %i shutdown\n", slot); |
| 810 | |
| 811 | /* success */ |
| 812 | return 0; |
| 813 | } |
| 814 | EXPORT_SYMBOL(dvb_ca_en50221_camready_irq); |
| 815 | |
| 816 | |
| 817 | /** |
| 818 | * A CAMCHANGE IRQ has occurred. |
| 819 | * |
| 820 | * @param ca CA instance. |
| 821 | * @param slot Slot concerned. |
| 822 | * @param change_type One of the DVB_CA_CAMCHANGE_* values. |
| 823 | */ |
| 824 | void dvb_ca_en50221_camchange_irq(struct dvb_ca_en50221 *pubca, int slot, int change_type) |
| 825 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 826 | struct dvb_ca_private *ca = pubca->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | |
| 828 | dprintk("CAMCHANGE IRQ slot:%i change_type:%i\n", slot, change_type); |
| 829 | |
| 830 | switch (change_type) { |
| 831 | case DVB_CA_EN50221_CAMCHANGE_REMOVED: |
| 832 | case DVB_CA_EN50221_CAMCHANGE_INSERTED: |
| 833 | break; |
| 834 | |
| 835 | default: |
| 836 | return; |
| 837 | } |
| 838 | |
| 839 | ca->slot_info[slot].camchange_type = change_type; |
| 840 | atomic_inc(&ca->slot_info[slot].camchange_count); |
| 841 | dvb_ca_en50221_thread_wakeup(ca); |
| 842 | } |
| 843 | EXPORT_SYMBOL(dvb_ca_en50221_frda_irq); |
| 844 | |
| 845 | |
| 846 | /** |
| 847 | * A CAMREADY IRQ has occurred. |
| 848 | * |
| 849 | * @param ca CA instance. |
| 850 | * @param slot Slot concerned. |
| 851 | */ |
| 852 | void dvb_ca_en50221_camready_irq(struct dvb_ca_en50221 *pubca, int slot) |
| 853 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 854 | struct dvb_ca_private *ca = pubca->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | |
| 856 | dprintk("CAMREADY IRQ slot:%i\n", slot); |
| 857 | |
| 858 | if (ca->slot_info[slot].slot_state == DVB_CA_SLOTSTATE_WAITREADY) { |
| 859 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_VALIDATE; |
| 860 | dvb_ca_en50221_thread_wakeup(ca); |
| 861 | } |
| 862 | } |
| 863 | |
| 864 | |
| 865 | /** |
| 866 | * An FR or DA IRQ has occurred. |
| 867 | * |
| 868 | * @param ca CA instance. |
| 869 | * @param slot Slot concerned. |
| 870 | */ |
| 871 | void dvb_ca_en50221_frda_irq(struct dvb_ca_en50221 *pubca, int slot) |
| 872 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 873 | struct dvb_ca_private *ca = pubca->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | int flags; |
| 875 | |
| 876 | dprintk("FR/DA IRQ slot:%i\n", slot); |
| 877 | |
| 878 | switch (ca->slot_info[slot].slot_state) { |
| 879 | case DVB_CA_SLOTSTATE_LINKINIT: |
| 880 | flags = ca->pub->read_cam_control(pubca, slot, CTRLIF_STATUS); |
| 881 | if (flags & STATUSREG_DA) { |
| 882 | dprintk("CAM supports DA IRQ\n"); |
| 883 | ca->slot_info[slot].da_irq_supported = 1; |
| 884 | } |
| 885 | break; |
| 886 | |
| 887 | case DVB_CA_SLOTSTATE_RUNNING: |
| 888 | if (ca->open) |
Andrew de Quincey | ded9284 | 2005-12-01 00:51:49 -0800 | [diff] [blame] | 889 | dvb_ca_en50221_thread_wakeup(ca); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | break; |
| 891 | } |
| 892 | } |
| 893 | |
| 894 | |
| 895 | |
| 896 | /* ******************************************************************************** */ |
| 897 | /* EN50221 thread functions */ |
| 898 | |
| 899 | /** |
| 900 | * Wake up the DVB CA thread |
| 901 | * |
| 902 | * @param ca CA instance. |
| 903 | */ |
| 904 | static void dvb_ca_en50221_thread_wakeup(struct dvb_ca_private *ca) |
| 905 | { |
| 906 | |
Harvey Harrison | 46b4f7c | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 907 | dprintk("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | |
| 909 | ca->wakeup = 1; |
| 910 | mb(); |
Christoph Hellwig | 9320874 | 2007-10-03 11:23:01 -0300 | [diff] [blame] | 911 | wake_up_process(ca->thread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | } |
| 913 | |
| 914 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | * Update the delay used by the thread. |
| 916 | * |
| 917 | * @param ca CA instance. |
| 918 | */ |
| 919 | static void dvb_ca_en50221_thread_update_delay(struct dvb_ca_private *ca) |
| 920 | { |
| 921 | int delay; |
| 922 | int curdelay = 100000000; |
| 923 | int slot; |
| 924 | |
Robert Schedel | 71a35fe | 2008-05-03 12:58:36 -0300 | [diff] [blame] | 925 | /* Beware of too high polling frequency, because one polling |
| 926 | * call might take several hundred milliseconds until timeout! |
| 927 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | for (slot = 0; slot < ca->slot_count; slot++) { |
| 929 | switch (ca->slot_info[slot].slot_state) { |
| 930 | default: |
| 931 | case DVB_CA_SLOTSTATE_NONE: |
Robert Schedel | 71a35fe | 2008-05-03 12:58:36 -0300 | [diff] [blame] | 932 | delay = HZ * 60; /* 60s */ |
| 933 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) |
| 934 | delay = HZ * 5; /* 5s */ |
| 935 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | case DVB_CA_SLOTSTATE_INVALID: |
Robert Schedel | 71a35fe | 2008-05-03 12:58:36 -0300 | [diff] [blame] | 937 | delay = HZ * 60; /* 60s */ |
| 938 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) |
| 939 | delay = HZ / 10; /* 100ms */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | break; |
| 941 | |
| 942 | case DVB_CA_SLOTSTATE_UNINITIALISED: |
| 943 | case DVB_CA_SLOTSTATE_WAITREADY: |
| 944 | case DVB_CA_SLOTSTATE_VALIDATE: |
| 945 | case DVB_CA_SLOTSTATE_WAITFR: |
| 946 | case DVB_CA_SLOTSTATE_LINKINIT: |
Robert Schedel | 71a35fe | 2008-05-03 12:58:36 -0300 | [diff] [blame] | 947 | delay = HZ / 10; /* 100ms */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | break; |
| 949 | |
| 950 | case DVB_CA_SLOTSTATE_RUNNING: |
Robert Schedel | 71a35fe | 2008-05-03 12:58:36 -0300 | [diff] [blame] | 951 | delay = HZ * 60; /* 60s */ |
| 952 | if (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) |
| 953 | delay = HZ / 10; /* 100ms */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | if (ca->open) { |
| 955 | if ((!ca->slot_info[slot].da_irq_supported) || |
Robert Schedel | 71a35fe | 2008-05-03 12:58:36 -0300 | [diff] [blame] | 956 | (!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_DA))) |
| 957 | delay = HZ / 10; /* 100ms */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | } |
| 959 | break; |
| 960 | } |
| 961 | |
| 962 | if (delay < curdelay) |
| 963 | curdelay = delay; |
| 964 | } |
| 965 | |
| 966 | ca->delay = curdelay; |
| 967 | } |
| 968 | |
| 969 | |
| 970 | |
| 971 | /** |
| 972 | * Kernel thread which monitors CA slots for CAM changes, and performs data transfers. |
| 973 | */ |
| 974 | static int dvb_ca_en50221_thread(void *data) |
| 975 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 976 | struct dvb_ca_private *ca = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | int slot; |
| 978 | int flags; |
| 979 | int status; |
| 980 | int pktcount; |
| 981 | void *rxbuf; |
| 982 | |
Harvey Harrison | 46b4f7c | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 983 | dprintk("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | /* choose the correct initial delay */ |
| 986 | dvb_ca_en50221_thread_update_delay(ca); |
| 987 | |
| 988 | /* main loop */ |
Christoph Hellwig | 9320874 | 2007-10-03 11:23:01 -0300 | [diff] [blame] | 989 | while (!kthread_should_stop()) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | /* sleep for a bit */ |
Marco Schluessler | a39a8ed | 2007-10-16 08:25:42 -0300 | [diff] [blame] | 991 | if (!ca->wakeup) { |
Christoph Hellwig | 9320874 | 2007-10-03 11:23:01 -0300 | [diff] [blame] | 992 | set_current_state(TASK_INTERRUPTIBLE); |
| 993 | schedule_timeout(ca->delay); |
| 994 | if (kthread_should_stop()) |
| 995 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | } |
| 997 | ca->wakeup = 0; |
| 998 | |
| 999 | /* go through all the slots processing them */ |
| 1000 | for (slot = 0; slot < ca->slot_count; slot++) { |
| 1001 | |
Matthias Dahl | d7e4384 | 2008-09-26 06:29:03 -0300 | [diff] [blame] | 1002 | mutex_lock(&ca->slot_info[slot].slot_lock); |
| 1003 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | // check the cam status + deal with CAMCHANGEs |
| 1005 | while (dvb_ca_en50221_check_camstatus(ca, slot)) { |
| 1006 | /* clear down an old CI slot if necessary */ |
| 1007 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_NONE) |
| 1008 | dvb_ca_en50221_slot_shutdown(ca, slot); |
| 1009 | |
| 1010 | /* if a CAM is NOW present, initialise it */ |
| 1011 | if (ca->slot_info[slot].camchange_type == DVB_CA_EN50221_CAMCHANGE_INSERTED) { |
| 1012 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_UNINITIALISED; |
| 1013 | } |
| 1014 | |
| 1015 | /* we've handled one CAMCHANGE */ |
| 1016 | dvb_ca_en50221_thread_update_delay(ca); |
| 1017 | atomic_dec(&ca->slot_info[slot].camchange_count); |
| 1018 | } |
| 1019 | |
| 1020 | // CAM state machine |
| 1021 | switch (ca->slot_info[slot].slot_state) { |
| 1022 | case DVB_CA_SLOTSTATE_NONE: |
| 1023 | case DVB_CA_SLOTSTATE_INVALID: |
| 1024 | // no action needed |
| 1025 | break; |
| 1026 | |
| 1027 | case DVB_CA_SLOTSTATE_UNINITIALISED: |
| 1028 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_WAITREADY; |
| 1029 | ca->pub->slot_reset(ca->pub, slot); |
| 1030 | ca->slot_info[slot].timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); |
| 1031 | break; |
| 1032 | |
| 1033 | case DVB_CA_SLOTSTATE_WAITREADY: |
| 1034 | if (time_after(jiffies, ca->slot_info[slot].timeout)) { |
| 1035 | printk("dvb_ca adaptor %d: PC card did not respond :(\n", |
| 1036 | ca->dvbdev->adapter->num); |
| 1037 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; |
| 1038 | dvb_ca_en50221_thread_update_delay(ca); |
| 1039 | break; |
| 1040 | } |
| 1041 | // no other action needed; will automatically change state when ready |
| 1042 | break; |
| 1043 | |
| 1044 | case DVB_CA_SLOTSTATE_VALIDATE: |
Andrew de Quincey | 5c1208b | 2006-05-22 10:32:02 -0300 | [diff] [blame] | 1045 | if (dvb_ca_en50221_parse_attributes(ca, slot) != 0) { |
| 1046 | /* we need this extra check for annoying interfaces like the budget-av */ |
| 1047 | if ((!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) && |
| 1048 | (ca->pub->poll_slot_status)) { |
Hans Verkuil | c6eb8ea | 2008-09-03 17:11:54 -0300 | [diff] [blame] | 1049 | status = ca->pub->poll_slot_status(ca->pub, slot, 0); |
Andrew de Quincey | 5c1208b | 2006-05-22 10:32:02 -0300 | [diff] [blame] | 1050 | if (!(status & DVB_CA_EN50221_POLL_CAM_PRESENT)) { |
| 1051 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; |
| 1052 | dvb_ca_en50221_thread_update_delay(ca); |
| 1053 | break; |
| 1054 | } |
| 1055 | } |
| 1056 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | printk("dvb_ca adapter %d: Invalid PC card inserted :(\n", |
| 1058 | ca->dvbdev->adapter->num); |
| 1059 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; |
| 1060 | dvb_ca_en50221_thread_update_delay(ca); |
| 1061 | break; |
| 1062 | } |
| 1063 | if (dvb_ca_en50221_set_configoption(ca, slot) != 0) { |
| 1064 | printk("dvb_ca adapter %d: Unable to initialise CAM :(\n", |
| 1065 | ca->dvbdev->adapter->num); |
| 1066 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; |
| 1067 | dvb_ca_en50221_thread_update_delay(ca); |
| 1068 | break; |
| 1069 | } |
| 1070 | if (ca->pub->write_cam_control(ca->pub, slot, |
| 1071 | CTRLIF_COMMAND, CMDREG_RS) != 0) { |
| 1072 | printk("dvb_ca adapter %d: Unable to reset CAM IF\n", |
| 1073 | ca->dvbdev->adapter->num); |
| 1074 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; |
| 1075 | dvb_ca_en50221_thread_update_delay(ca); |
| 1076 | break; |
| 1077 | } |
| 1078 | dprintk("DVB CAM validated successfully\n"); |
| 1079 | |
| 1080 | ca->slot_info[slot].timeout = jiffies + (INIT_TIMEOUT_SECS * HZ); |
| 1081 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_WAITFR; |
| 1082 | ca->wakeup = 1; |
| 1083 | break; |
| 1084 | |
| 1085 | case DVB_CA_SLOTSTATE_WAITFR: |
| 1086 | if (time_after(jiffies, ca->slot_info[slot].timeout)) { |
| 1087 | printk("dvb_ca adapter %d: DVB CAM did not respond :(\n", |
| 1088 | ca->dvbdev->adapter->num); |
| 1089 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; |
| 1090 | dvb_ca_en50221_thread_update_delay(ca); |
| 1091 | break; |
| 1092 | } |
| 1093 | |
| 1094 | flags = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS); |
| 1095 | if (flags & STATUSREG_FR) { |
| 1096 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; |
| 1097 | ca->wakeup = 1; |
| 1098 | } |
| 1099 | break; |
| 1100 | |
| 1101 | case DVB_CA_SLOTSTATE_LINKINIT: |
| 1102 | if (dvb_ca_en50221_link_init(ca, slot) != 0) { |
Andrew de Quincey | 5c1208b | 2006-05-22 10:32:02 -0300 | [diff] [blame] | 1103 | /* we need this extra check for annoying interfaces like the budget-av */ |
| 1104 | if ((!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) && |
| 1105 | (ca->pub->poll_slot_status)) { |
Hans Verkuil | c6eb8ea | 2008-09-03 17:11:54 -0300 | [diff] [blame] | 1106 | status = ca->pub->poll_slot_status(ca->pub, slot, 0); |
Andrew de Quincey | 5c1208b | 2006-05-22 10:32:02 -0300 | [diff] [blame] | 1107 | if (!(status & DVB_CA_EN50221_POLL_CAM_PRESENT)) { |
| 1108 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE; |
| 1109 | dvb_ca_en50221_thread_update_delay(ca); |
| 1110 | break; |
| 1111 | } |
| 1112 | } |
| 1113 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | printk("dvb_ca adapter %d: DVB CAM link initialisation failed :(\n", ca->dvbdev->adapter->num); |
| 1115 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; |
| 1116 | dvb_ca_en50221_thread_update_delay(ca); |
| 1117 | break; |
| 1118 | } |
| 1119 | |
Andrew de Quincey | ded9284 | 2005-12-01 00:51:49 -0800 | [diff] [blame] | 1120 | if (ca->slot_info[slot].rx_buffer.data == NULL) { |
| 1121 | rxbuf = vmalloc(RX_BUFFER_SIZE); |
| 1122 | if (rxbuf == NULL) { |
| 1123 | printk("dvb_ca adapter %d: Unable to allocate CAM rx buffer :(\n", ca->dvbdev->adapter->num); |
| 1124 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_INVALID; |
| 1125 | dvb_ca_en50221_thread_update_delay(ca); |
| 1126 | break; |
| 1127 | } |
| 1128 | dvb_ringbuffer_init(&ca->slot_info[slot].rx_buffer, rxbuf, RX_BUFFER_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | |
| 1131 | ca->pub->slot_ts_enable(ca->pub, slot); |
| 1132 | ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_RUNNING; |
| 1133 | dvb_ca_en50221_thread_update_delay(ca); |
| 1134 | printk("dvb_ca adapter %d: DVB CAM detected and initialised successfully\n", ca->dvbdev->adapter->num); |
| 1135 | break; |
| 1136 | |
| 1137 | case DVB_CA_SLOTSTATE_RUNNING: |
| 1138 | if (!ca->open) |
Matthias Dahl | d7e4384 | 2008-09-26 06:29:03 -0300 | [diff] [blame] | 1139 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | |
Andrew de Quincey | ded9284 | 2005-12-01 00:51:49 -0800 | [diff] [blame] | 1141 | // poll slots for data |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | pktcount = 0; |
| 1143 | while ((status = dvb_ca_en50221_read_data(ca, slot, NULL, 0)) > 0) { |
| 1144 | if (!ca->open) |
| 1145 | break; |
| 1146 | |
| 1147 | /* if a CAMCHANGE occurred at some point, do not do any more processing of this slot */ |
| 1148 | if (dvb_ca_en50221_check_camstatus(ca, slot)) { |
| 1149 | // we dont want to sleep on the next iteration so we can handle the cam change |
| 1150 | ca->wakeup = 1; |
| 1151 | break; |
| 1152 | } |
| 1153 | |
| 1154 | /* check if we've hit our limit this time */ |
| 1155 | if (++pktcount >= MAX_RX_PACKETS_PER_ITERATION) { |
| 1156 | // dont sleep; there is likely to be more data to read |
| 1157 | ca->wakeup = 1; |
| 1158 | break; |
| 1159 | } |
| 1160 | } |
| 1161 | break; |
| 1162 | } |
Matthias Dahl | d7e4384 | 2008-09-26 06:29:03 -0300 | [diff] [blame] | 1163 | |
| 1164 | mutex_unlock(&ca->slot_info[slot].slot_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | } |
| 1166 | } |
| 1167 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1168 | return 0; |
| 1169 | } |
| 1170 | |
| 1171 | |
| 1172 | |
| 1173 | /* ******************************************************************************** */ |
| 1174 | /* EN50221 IO interface functions */ |
| 1175 | |
| 1176 | /** |
| 1177 | * Real ioctl implementation. |
| 1178 | * NOTE: CA_SEND_MSG/CA_GET_MSG ioctls have userspace buffers passed to them. |
| 1179 | * |
| 1180 | * @param inode Inode concerned. |
| 1181 | * @param file File concerned. |
| 1182 | * @param cmd IOCTL command. |
| 1183 | * @param arg Associated argument. |
| 1184 | * |
| 1185 | * @return 0 on success, <0 on error. |
| 1186 | */ |
Arnd Bergmann | 16ef8de | 2010-04-27 00:24:00 +0200 | [diff] [blame] | 1187 | static int dvb_ca_en50221_io_do_ioctl(struct file *file, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | unsigned int cmd, void *parg) |
| 1189 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 1190 | struct dvb_device *dvbdev = file->private_data; |
| 1191 | struct dvb_ca_private *ca = dvbdev->priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | int err = 0; |
| 1193 | int slot; |
| 1194 | |
Harvey Harrison | 46b4f7c | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 1195 | dprintk("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | |
Nikolaus Schulz | 30ad64b | 2012-12-23 18:49:07 -0300 | [diff] [blame] | 1197 | if (mutex_lock_interruptible(&ca->ioctl_mutex)) |
| 1198 | return -ERESTARTSYS; |
| 1199 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | switch (cmd) { |
| 1201 | case CA_RESET: |
| 1202 | for (slot = 0; slot < ca->slot_count; slot++) { |
Matthias Dahl | d7e4384 | 2008-09-26 06:29:03 -0300 | [diff] [blame] | 1203 | mutex_lock(&ca->slot_info[slot].slot_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_NONE) { |
| 1205 | dvb_ca_en50221_slot_shutdown(ca, slot); |
| 1206 | if (ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE) |
| 1207 | dvb_ca_en50221_camchange_irq(ca->pub, |
| 1208 | slot, |
| 1209 | DVB_CA_EN50221_CAMCHANGE_INSERTED); |
| 1210 | } |
Matthias Dahl | d7e4384 | 2008-09-26 06:29:03 -0300 | [diff] [blame] | 1211 | mutex_unlock(&ca->slot_info[slot].slot_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | } |
| 1213 | ca->next_read_slot = 0; |
| 1214 | dvb_ca_en50221_thread_wakeup(ca); |
| 1215 | break; |
| 1216 | |
| 1217 | case CA_GET_CAP: { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 1218 | struct ca_caps *caps = parg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | |
| 1220 | caps->slot_num = ca->slot_count; |
| 1221 | caps->slot_type = CA_CI_LINK; |
| 1222 | caps->descr_num = 0; |
| 1223 | caps->descr_type = 0; |
| 1224 | break; |
| 1225 | } |
| 1226 | |
| 1227 | case CA_GET_SLOT_INFO: { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 1228 | struct ca_slot_info *info = parg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | |
Dan Carpenter | c4fe29a | 2013-01-04 14:56:02 -0300 | [diff] [blame] | 1230 | if ((info->num > ca->slot_count) || (info->num < 0)) { |
| 1231 | err = -EINVAL; |
| 1232 | goto out_unlock; |
| 1233 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | |
| 1235 | info->type = CA_CI_LINK; |
| 1236 | info->flags = 0; |
| 1237 | if ((ca->slot_info[info->num].slot_state != DVB_CA_SLOTSTATE_NONE) |
| 1238 | && (ca->slot_info[info->num].slot_state != DVB_CA_SLOTSTATE_INVALID)) { |
| 1239 | info->flags = CA_CI_MODULE_PRESENT; |
| 1240 | } |
| 1241 | if (ca->slot_info[info->num].slot_state == DVB_CA_SLOTSTATE_RUNNING) { |
| 1242 | info->flags |= CA_CI_MODULE_READY; |
| 1243 | } |
| 1244 | break; |
| 1245 | } |
| 1246 | |
| 1247 | default: |
| 1248 | err = -EINVAL; |
| 1249 | break; |
| 1250 | } |
| 1251 | |
Dan Carpenter | c4fe29a | 2013-01-04 14:56:02 -0300 | [diff] [blame] | 1252 | out_unlock: |
Nikolaus Schulz | 30ad64b | 2012-12-23 18:49:07 -0300 | [diff] [blame] | 1253 | mutex_unlock(&ca->ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | return err; |
| 1255 | } |
| 1256 | |
| 1257 | |
| 1258 | /** |
| 1259 | * Wrapper for ioctl implementation. |
| 1260 | * |
| 1261 | * @param inode Inode concerned. |
| 1262 | * @param file File concerned. |
| 1263 | * @param cmd IOCTL command. |
| 1264 | * @param arg Associated argument. |
| 1265 | * |
| 1266 | * @return 0 on success, <0 on error. |
| 1267 | */ |
Arnd Bergmann | 16ef8de | 2010-04-27 00:24:00 +0200 | [diff] [blame] | 1268 | static long dvb_ca_en50221_io_ioctl(struct file *file, |
| 1269 | unsigned int cmd, unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | { |
Arnd Bergmann | 72024f1 | 2010-09-11 19:56:45 +0200 | [diff] [blame] | 1271 | return dvb_usercopy(file, cmd, arg, dvb_ca_en50221_io_do_ioctl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | } |
| 1273 | |
| 1274 | |
| 1275 | /** |
| 1276 | * Implementation of write() syscall. |
| 1277 | * |
| 1278 | * @param file File structure. |
| 1279 | * @param buf Source buffer. |
| 1280 | * @param count Size of source buffer. |
| 1281 | * @param ppos Position in file (ignored). |
| 1282 | * |
| 1283 | * @return Number of bytes read, or <0 on error. |
| 1284 | */ |
| 1285 | static ssize_t dvb_ca_en50221_io_write(struct file *file, |
| 1286 | const char __user * buf, size_t count, loff_t * ppos) |
| 1287 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 1288 | struct dvb_device *dvbdev = file->private_data; |
| 1289 | struct dvb_ca_private *ca = dvbdev->priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | u8 slot, connection_id; |
| 1291 | int status; |
Oliver Endriss | 260f8d7 | 2007-07-13 11:54:35 -0300 | [diff] [blame] | 1292 | u8 fragbuf[HOST_LINK_BUF_SIZE]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | int fragpos = 0; |
| 1294 | int fraglen; |
| 1295 | unsigned long timeout; |
| 1296 | int written; |
| 1297 | |
Harvey Harrison | 46b4f7c | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 1298 | dprintk("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | |
| 1300 | /* Incoming packet has a 2 byte header. hdr[0] = slot_id, hdr[1] = connection_id */ |
| 1301 | if (count < 2) |
| 1302 | return -EINVAL; |
| 1303 | |
| 1304 | /* extract slot & connection id */ |
| 1305 | if (copy_from_user(&slot, buf, 1)) |
| 1306 | return -EFAULT; |
| 1307 | if (copy_from_user(&connection_id, buf + 1, 1)) |
| 1308 | return -EFAULT; |
| 1309 | buf += 2; |
| 1310 | count -= 2; |
| 1311 | |
| 1312 | /* check if the slot is actually running */ |
| 1313 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_RUNNING) |
| 1314 | return -EINVAL; |
| 1315 | |
| 1316 | /* fragment the packets & store in the buffer */ |
| 1317 | while (fragpos < count) { |
| 1318 | fraglen = ca->slot_info[slot].link_buf_size - 2; |
Mauro Carvalho Chehab | 624f0c1 | 2012-01-10 19:08:53 -0200 | [diff] [blame] | 1319 | if (fraglen < 0) |
| 1320 | break; |
| 1321 | if (fraglen > HOST_LINK_BUF_SIZE - 2) |
| 1322 | fraglen = HOST_LINK_BUF_SIZE - 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | if ((count - fragpos) < fraglen) |
| 1324 | fraglen = count - fragpos; |
| 1325 | |
| 1326 | fragbuf[0] = connection_id; |
| 1327 | fragbuf[1] = ((fragpos + fraglen) < count) ? 0x80 : 0x00; |
Dan Carpenter | e252984 | 2010-06-04 12:39:03 -0300 | [diff] [blame] | 1328 | status = copy_from_user(fragbuf + 2, buf + fragpos, fraglen); |
| 1329 | if (status) { |
| 1330 | status = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | goto exit; |
Dan Carpenter | e252984 | 2010-06-04 12:39:03 -0300 | [diff] [blame] | 1332 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1333 | |
| 1334 | timeout = jiffies + HZ / 2; |
| 1335 | written = 0; |
| 1336 | while (!time_after(jiffies, timeout)) { |
| 1337 | /* check the CAM hasn't been removed/reset in the meantime */ |
| 1338 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_RUNNING) { |
| 1339 | status = -EIO; |
| 1340 | goto exit; |
| 1341 | } |
| 1342 | |
Matthias Dahl | d7e4384 | 2008-09-26 06:29:03 -0300 | [diff] [blame] | 1343 | mutex_lock(&ca->slot_info[slot].slot_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | status = dvb_ca_en50221_write_data(ca, slot, fragbuf, fraglen + 2); |
Matthias Dahl | d7e4384 | 2008-09-26 06:29:03 -0300 | [diff] [blame] | 1345 | mutex_unlock(&ca->slot_info[slot].slot_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | if (status == (fraglen + 2)) { |
| 1347 | written = 1; |
| 1348 | break; |
| 1349 | } |
| 1350 | if (status != -EAGAIN) |
| 1351 | goto exit; |
| 1352 | |
| 1353 | msleep(1); |
| 1354 | } |
| 1355 | if (!written) { |
| 1356 | status = -EIO; |
| 1357 | goto exit; |
| 1358 | } |
| 1359 | |
| 1360 | fragpos += fraglen; |
| 1361 | } |
| 1362 | status = count + 2; |
| 1363 | |
| 1364 | exit: |
| 1365 | return status; |
| 1366 | } |
| 1367 | |
| 1368 | |
| 1369 | /** |
| 1370 | * Condition for waking up in dvb_ca_en50221_io_read_condition |
| 1371 | */ |
Andrew de Quincey | ded9284 | 2005-12-01 00:51:49 -0800 | [diff] [blame] | 1372 | static int dvb_ca_en50221_io_read_condition(struct dvb_ca_private *ca, |
| 1373 | int *result, int *_slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | { |
| 1375 | int slot; |
| 1376 | int slot_count = 0; |
| 1377 | int idx; |
Andrew de Quincey | ded9284 | 2005-12-01 00:51:49 -0800 | [diff] [blame] | 1378 | size_t fraglen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | int connection_id = -1; |
| 1380 | int found = 0; |
| 1381 | u8 hdr[2]; |
| 1382 | |
| 1383 | slot = ca->next_read_slot; |
| 1384 | while ((slot_count < ca->slot_count) && (!found)) { |
| 1385 | if (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_RUNNING) |
| 1386 | goto nextslot; |
| 1387 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1388 | if (ca->slot_info[slot].rx_buffer.data == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | return 0; |
| 1390 | } |
| 1391 | |
| 1392 | idx = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, -1, &fraglen); |
| 1393 | while (idx != -1) { |
Al Viro | b0ba0e3 | 2008-06-22 14:20:29 -0300 | [diff] [blame] | 1394 | dvb_ringbuffer_pkt_read(&ca->slot_info[slot].rx_buffer, idx, 0, hdr, 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | if (connection_id == -1) |
| 1396 | connection_id = hdr[0]; |
| 1397 | if ((hdr[0] == connection_id) && ((hdr[1] & 0x80) == 0)) { |
| 1398 | *_slot = slot; |
| 1399 | found = 1; |
| 1400 | break; |
| 1401 | } |
| 1402 | |
| 1403 | idx = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, idx, &fraglen); |
| 1404 | } |
| 1405 | |
Andrew de Quincey | ded9284 | 2005-12-01 00:51:49 -0800 | [diff] [blame] | 1406 | nextslot: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | slot = (slot + 1) % ca->slot_count; |
| 1408 | slot_count++; |
| 1409 | } |
| 1410 | |
| 1411 | ca->next_read_slot = slot; |
| 1412 | return found; |
| 1413 | } |
| 1414 | |
| 1415 | |
| 1416 | /** |
| 1417 | * Implementation of read() syscall. |
| 1418 | * |
| 1419 | * @param file File structure. |
| 1420 | * @param buf Destination buffer. |
| 1421 | * @param count Size of destination buffer. |
| 1422 | * @param ppos Position in file (ignored). |
| 1423 | * |
| 1424 | * @return Number of bytes read, or <0 on error. |
| 1425 | */ |
| 1426 | static ssize_t dvb_ca_en50221_io_read(struct file *file, char __user * buf, |
| 1427 | size_t count, loff_t * ppos) |
| 1428 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 1429 | struct dvb_device *dvbdev = file->private_data; |
| 1430 | struct dvb_ca_private *ca = dvbdev->priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1431 | int status; |
| 1432 | int result = 0; |
| 1433 | u8 hdr[2]; |
| 1434 | int slot; |
| 1435 | int connection_id = -1; |
| 1436 | size_t idx, idx2; |
| 1437 | int last_fragment = 0; |
| 1438 | size_t fraglen; |
| 1439 | int pktlen; |
| 1440 | int dispose = 0; |
| 1441 | |
Harvey Harrison | 46b4f7c | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 1442 | dprintk("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | |
| 1444 | /* Outgoing packet has a 2 byte header. hdr[0] = slot_id, hdr[1] = connection_id */ |
| 1445 | if (count < 2) |
| 1446 | return -EINVAL; |
| 1447 | |
| 1448 | /* wait for some data */ |
| 1449 | if ((status = dvb_ca_en50221_io_read_condition(ca, &result, &slot)) == 0) { |
| 1450 | |
| 1451 | /* if we're in nonblocking mode, exit immediately */ |
| 1452 | if (file->f_flags & O_NONBLOCK) |
| 1453 | return -EWOULDBLOCK; |
| 1454 | |
| 1455 | /* wait for some data */ |
| 1456 | status = wait_event_interruptible(ca->wait_queue, |
| 1457 | dvb_ca_en50221_io_read_condition |
| 1458 | (ca, &result, &slot)); |
| 1459 | } |
| 1460 | if ((status < 0) || (result < 0)) { |
| 1461 | if (result) |
| 1462 | return result; |
| 1463 | return status; |
| 1464 | } |
| 1465 | |
| 1466 | idx = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, -1, &fraglen); |
| 1467 | pktlen = 2; |
| 1468 | do { |
| 1469 | if (idx == -1) { |
| 1470 | printk("dvb_ca adapter %d: BUG: read packet ended before last_fragment encountered\n", ca->dvbdev->adapter->num); |
| 1471 | status = -EIO; |
| 1472 | goto exit; |
| 1473 | } |
| 1474 | |
Al Viro | b0ba0e3 | 2008-06-22 14:20:29 -0300 | [diff] [blame] | 1475 | dvb_ringbuffer_pkt_read(&ca->slot_info[slot].rx_buffer, idx, 0, hdr, 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1476 | if (connection_id == -1) |
| 1477 | connection_id = hdr[0]; |
| 1478 | if (hdr[0] == connection_id) { |
| 1479 | if (pktlen < count) { |
| 1480 | if ((pktlen + fraglen - 2) > count) { |
| 1481 | fraglen = count - pktlen; |
| 1482 | } else { |
| 1483 | fraglen -= 2; |
| 1484 | } |
| 1485 | |
Al Viro | b0ba0e3 | 2008-06-22 14:20:29 -0300 | [diff] [blame] | 1486 | if ((status = dvb_ringbuffer_pkt_read_user(&ca->slot_info[slot].rx_buffer, idx, 2, |
| 1487 | buf + pktlen, fraglen)) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | goto exit; |
| 1489 | } |
| 1490 | pktlen += fraglen; |
| 1491 | } |
| 1492 | |
| 1493 | if ((hdr[1] & 0x80) == 0) |
| 1494 | last_fragment = 1; |
| 1495 | dispose = 1; |
| 1496 | } |
| 1497 | |
| 1498 | idx2 = dvb_ringbuffer_pkt_next(&ca->slot_info[slot].rx_buffer, idx, &fraglen); |
| 1499 | if (dispose) |
| 1500 | dvb_ringbuffer_pkt_dispose(&ca->slot_info[slot].rx_buffer, idx); |
| 1501 | idx = idx2; |
| 1502 | dispose = 0; |
| 1503 | } while (!last_fragment); |
| 1504 | |
| 1505 | hdr[0] = slot; |
| 1506 | hdr[1] = connection_id; |
Dan Carpenter | e252984 | 2010-06-04 12:39:03 -0300 | [diff] [blame] | 1507 | status = copy_to_user(buf, hdr, 2); |
| 1508 | if (status) { |
| 1509 | status = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | goto exit; |
Dan Carpenter | e252984 | 2010-06-04 12:39:03 -0300 | [diff] [blame] | 1511 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1512 | status = pktlen; |
| 1513 | |
Andrew de Quincey | ded9284 | 2005-12-01 00:51:49 -0800 | [diff] [blame] | 1514 | exit: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1515 | return status; |
| 1516 | } |
| 1517 | |
| 1518 | |
| 1519 | /** |
| 1520 | * Implementation of file open syscall. |
| 1521 | * |
| 1522 | * @param inode Inode concerned. |
| 1523 | * @param file File concerned. |
| 1524 | * |
| 1525 | * @return 0 on success, <0 on failure. |
| 1526 | */ |
| 1527 | static int dvb_ca_en50221_io_open(struct inode *inode, struct file *file) |
| 1528 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 1529 | struct dvb_device *dvbdev = file->private_data; |
| 1530 | struct dvb_ca_private *ca = dvbdev->priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | int err; |
| 1532 | int i; |
| 1533 | |
Harvey Harrison | 46b4f7c | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 1534 | dprintk("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1535 | |
| 1536 | if (!try_module_get(ca->pub->owner)) |
| 1537 | return -EIO; |
| 1538 | |
| 1539 | err = dvb_generic_open(inode, file); |
Marco Schluessler | 226835d | 2007-08-25 11:46:07 -0300 | [diff] [blame] | 1540 | if (err < 0) { |
| 1541 | module_put(ca->pub->owner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1542 | return err; |
Marco Schluessler | 226835d | 2007-08-25 11:46:07 -0300 | [diff] [blame] | 1543 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1544 | |
| 1545 | for (i = 0; i < ca->slot_count; i++) { |
| 1546 | |
| 1547 | if (ca->slot_info[i].slot_state == DVB_CA_SLOTSTATE_RUNNING) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1548 | if (ca->slot_info[i].rx_buffer.data != NULL) { |
Andrew de Quincey | ded9284 | 2005-12-01 00:51:49 -0800 | [diff] [blame] | 1549 | /* it is safe to call this here without locks because |
| 1550 | * ca->open == 0. Data is not read in this case */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1551 | dvb_ringbuffer_flush(&ca->slot_info[i].rx_buffer); |
| 1552 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1553 | } |
| 1554 | } |
| 1555 | |
| 1556 | ca->open = 1; |
| 1557 | dvb_ca_en50221_thread_update_delay(ca); |
| 1558 | dvb_ca_en50221_thread_wakeup(ca); |
| 1559 | |
| 1560 | return 0; |
| 1561 | } |
| 1562 | |
| 1563 | |
| 1564 | /** |
| 1565 | * Implementation of file close syscall. |
| 1566 | * |
| 1567 | * @param inode Inode concerned. |
| 1568 | * @param file File concerned. |
| 1569 | * |
| 1570 | * @return 0 on success, <0 on failure. |
| 1571 | */ |
| 1572 | static int dvb_ca_en50221_io_release(struct inode *inode, struct file *file) |
| 1573 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 1574 | struct dvb_device *dvbdev = file->private_data; |
| 1575 | struct dvb_ca_private *ca = dvbdev->priv; |
Marco Schluessler | 0c12c1b | 2007-08-25 11:36:39 -0300 | [diff] [blame] | 1576 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1577 | |
Harvey Harrison | 46b4f7c | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 1578 | dprintk("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | |
| 1580 | /* mark the CA device as closed */ |
| 1581 | ca->open = 0; |
| 1582 | dvb_ca_en50221_thread_update_delay(ca); |
| 1583 | |
| 1584 | err = dvb_generic_release(inode, file); |
| 1585 | |
| 1586 | module_put(ca->pub->owner); |
| 1587 | |
Marco Schluessler | 0c12c1b | 2007-08-25 11:36:39 -0300 | [diff] [blame] | 1588 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | } |
| 1590 | |
| 1591 | |
| 1592 | /** |
| 1593 | * Implementation of poll() syscall. |
| 1594 | * |
| 1595 | * @param file File concerned. |
| 1596 | * @param wait poll wait table. |
| 1597 | * |
| 1598 | * @return Standard poll mask. |
| 1599 | */ |
| 1600 | static unsigned int dvb_ca_en50221_io_poll(struct file *file, poll_table * wait) |
| 1601 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 1602 | struct dvb_device *dvbdev = file->private_data; |
| 1603 | struct dvb_ca_private *ca = dvbdev->priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1604 | unsigned int mask = 0; |
| 1605 | int slot; |
| 1606 | int result = 0; |
| 1607 | |
Harvey Harrison | 46b4f7c | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 1608 | dprintk("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1609 | |
| 1610 | if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1611 | mask |= POLLIN; |
| 1612 | } |
| 1613 | |
| 1614 | /* if there is something, return now */ |
| 1615 | if (mask) |
| 1616 | return mask; |
| 1617 | |
| 1618 | /* wait for something to happen */ |
| 1619 | poll_wait(file, &ca->wait_queue, wait); |
| 1620 | |
| 1621 | if (dvb_ca_en50221_io_read_condition(ca, &result, &slot) == 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1622 | mask |= POLLIN; |
| 1623 | } |
| 1624 | |
| 1625 | return mask; |
| 1626 | } |
| 1627 | EXPORT_SYMBOL(dvb_ca_en50221_init); |
| 1628 | |
| 1629 | |
Jan Engelhardt | 784e29d | 2009-01-11 06:12:43 -0300 | [diff] [blame] | 1630 | static const struct file_operations dvb_ca_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1631 | .owner = THIS_MODULE, |
| 1632 | .read = dvb_ca_en50221_io_read, |
| 1633 | .write = dvb_ca_en50221_io_write, |
Arnd Bergmann | 16ef8de | 2010-04-27 00:24:00 +0200 | [diff] [blame] | 1634 | .unlocked_ioctl = dvb_ca_en50221_io_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1635 | .open = dvb_ca_en50221_io_open, |
| 1636 | .release = dvb_ca_en50221_io_release, |
| 1637 | .poll = dvb_ca_en50221_io_poll, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 1638 | .llseek = noop_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1639 | }; |
| 1640 | |
| 1641 | static struct dvb_device dvbdev_ca = { |
| 1642 | .priv = NULL, |
| 1643 | .users = 1, |
| 1644 | .readers = 1, |
| 1645 | .writers = 1, |
| 1646 | .fops = &dvb_ca_fops, |
| 1647 | }; |
| 1648 | |
| 1649 | |
| 1650 | /* ******************************************************************************** */ |
| 1651 | /* Initialisation/shutdown functions */ |
| 1652 | |
| 1653 | |
| 1654 | /** |
| 1655 | * Initialise a new DVB CA EN50221 interface device. |
| 1656 | * |
| 1657 | * @param dvb_adapter DVB adapter to attach the new CA device to. |
| 1658 | * @param ca The dvb_ca instance. |
| 1659 | * @param flags Flags describing the CA device (DVB_CA_FLAG_*). |
| 1660 | * @param slot_count Number of slots supported. |
| 1661 | * |
| 1662 | * @return 0 on success, nonzero on failure |
| 1663 | */ |
| 1664 | int dvb_ca_en50221_init(struct dvb_adapter *dvb_adapter, |
| 1665 | struct dvb_ca_en50221 *pubca, int flags, int slot_count) |
| 1666 | { |
| 1667 | int ret; |
| 1668 | struct dvb_ca_private *ca = NULL; |
| 1669 | int i; |
| 1670 | |
Harvey Harrison | 46b4f7c | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 1671 | dprintk("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1672 | |
| 1673 | if (slot_count < 1) |
| 1674 | return -EINVAL; |
| 1675 | |
| 1676 | /* initialise the system data */ |
Panagiotis Issaris | 7408187 | 2006-01-11 19:40:56 -0200 | [diff] [blame] | 1677 | if ((ca = kzalloc(sizeof(struct dvb_ca_private), GFP_KERNEL)) == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1678 | ret = -ENOMEM; |
| 1679 | goto error; |
| 1680 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1681 | ca->pub = pubca; |
| 1682 | ca->flags = flags; |
| 1683 | ca->slot_count = slot_count; |
Panagiotis Issaris | 7408187 | 2006-01-11 19:40:56 -0200 | [diff] [blame] | 1684 | if ((ca->slot_info = kcalloc(slot_count, sizeof(struct dvb_ca_slot), GFP_KERNEL)) == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1685 | ret = -ENOMEM; |
| 1686 | goto error; |
| 1687 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1688 | init_waitqueue_head(&ca->wait_queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1689 | ca->open = 0; |
| 1690 | ca->wakeup = 0; |
| 1691 | ca->next_read_slot = 0; |
| 1692 | pubca->private = ca; |
| 1693 | |
| 1694 | /* register the DVB device */ |
| 1695 | ret = dvb_register_device(dvb_adapter, &ca->dvbdev, &dvbdev_ca, ca, DVB_DEVICE_CA); |
| 1696 | if (ret) |
| 1697 | goto error; |
| 1698 | |
| 1699 | /* now initialise each slot */ |
| 1700 | for (i = 0; i < slot_count; i++) { |
| 1701 | memset(&ca->slot_info[i], 0, sizeof(struct dvb_ca_slot)); |
| 1702 | ca->slot_info[i].slot_state = DVB_CA_SLOTSTATE_NONE; |
| 1703 | atomic_set(&ca->slot_info[i].camchange_count, 0); |
| 1704 | ca->slot_info[i].camchange_type = DVB_CA_EN50221_CAMCHANGE_REMOVED; |
Matthias Dahl | d7e4384 | 2008-09-26 06:29:03 -0300 | [diff] [blame] | 1705 | mutex_init(&ca->slot_info[i].slot_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1706 | } |
| 1707 | |
Nikolaus Schulz | 30ad64b | 2012-12-23 18:49:07 -0300 | [diff] [blame] | 1708 | mutex_init(&ca->ioctl_mutex); |
| 1709 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1710 | if (signal_pending(current)) { |
| 1711 | ret = -EINTR; |
| 1712 | goto error; |
| 1713 | } |
| 1714 | mb(); |
| 1715 | |
| 1716 | /* create a kthread for monitoring this CA device */ |
Christoph Hellwig | 9320874 | 2007-10-03 11:23:01 -0300 | [diff] [blame] | 1717 | ca->thread = kthread_run(dvb_ca_en50221_thread, ca, "kdvb-ca-%i:%i", |
| 1718 | ca->dvbdev->adapter->num, ca->dvbdev->id); |
| 1719 | if (IS_ERR(ca->thread)) { |
| 1720 | ret = PTR_ERR(ca->thread); |
| 1721 | printk("dvb_ca_init: failed to start kernel_thread (%d)\n", |
| 1722 | ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1723 | goto error; |
| 1724 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1725 | return 0; |
| 1726 | |
Andrew de Quincey | ded9284 | 2005-12-01 00:51:49 -0800 | [diff] [blame] | 1727 | error: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1728 | if (ca != NULL) { |
| 1729 | if (ca->dvbdev != NULL) |
| 1730 | dvb_unregister_device(ca->dvbdev); |
| 1731 | kfree(ca->slot_info); |
| 1732 | kfree(ca); |
| 1733 | } |
| 1734 | pubca->private = NULL; |
| 1735 | return ret; |
| 1736 | } |
| 1737 | EXPORT_SYMBOL(dvb_ca_en50221_release); |
| 1738 | |
| 1739 | |
| 1740 | |
| 1741 | /** |
| 1742 | * Release a DVB CA EN50221 interface device. |
| 1743 | * |
| 1744 | * @param ca_dev The dvb_device_t instance for the CA device. |
| 1745 | * @param ca The associated dvb_ca instance. |
| 1746 | */ |
| 1747 | void dvb_ca_en50221_release(struct dvb_ca_en50221 *pubca) |
| 1748 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 1749 | struct dvb_ca_private *ca = pubca->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1750 | int i; |
| 1751 | |
Harvey Harrison | 46b4f7c | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 1752 | dprintk("%s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1753 | |
| 1754 | /* shutdown the thread if there was one */ |
Christoph Hellwig | 9320874 | 2007-10-03 11:23:01 -0300 | [diff] [blame] | 1755 | kthread_stop(ca->thread); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1756 | |
| 1757 | for (i = 0; i < ca->slot_count; i++) { |
| 1758 | dvb_ca_en50221_slot_shutdown(ca, i); |
Michael Krufky | 35dc0fe | 2006-01-09 15:25:12 -0200 | [diff] [blame] | 1759 | vfree(ca->slot_info[i].rx_buffer.data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | } |
| 1761 | kfree(ca->slot_info); |
| 1762 | dvb_unregister_device(ca->dvbdev); |
| 1763 | kfree(ca); |
| 1764 | pubca->private = NULL; |
| 1765 | } |