drivers/media/dvb/ttpci/av7110_ca.c

   1 /*
   2  * av7110_ca.c: CA and CI stuff
   3  *
   4  * Copyright (C) 1999-2002 Ralph  Metzler
   5  *                       & Marcus Metzler for convergence integrated media GmbH
   6  *
   7  * originally based on code by:
   8  * Copyright (C) 1998,1999 Christian Theiss <mistert@rz.fh-augsburg.de>
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version 2
  13  * of the License, or (at your option) any later version.
  14  *
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25  * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
  26  *
  27  *
  28  * the project's page is at http://www.linuxtv.org/dvb/
  29  */
  30
  31 #include <linux/kernel.h>
  32 #include <linux/sched.h>
  33 #include <linux/types.h>
  34 #include <linux/delay.h>
  35 #include <linux/fs.h>
  36 #include <linux/timer.h>
  37 #include <linux/poll.h>
  38 #include <linux/byteorder/swabb.h>
  39 #include <linux/smp_lock.h>
  40
  41 #include "av7110.h"
  42 #include "av7110_hw.h"
  43
  44
  45 void CI_handle(struct av7110 *av7110, u8 *data, u16 len)
  46 {
  47         dprintk(8, "av7110:%p\n",av7110);
  48
  49         if (len < 3)
  50                 return;
  51         switch (data[0]) {
  52         case CI_MSG_CI_INFO:
  53                 if (data[2] != 1 && data[2] != 2)
  54                         break;
  55                 switch (data[1]) {
  56                 case 0:
  57                         av7110->ci_slot[data[2] - 1].flags = 0;
  58                         break;
  59                 case 1:
  60                         av7110->ci_slot[data[2] - 1].flags |= CA_CI_MODULE_PRESENT;
  61                         break;
  62                 case 2:
  63                         av7110->ci_slot[data[2] - 1].flags |= CA_CI_MODULE_READY;
  64                         break;
  65                 }
  66                 break;
  67         case CI_SWITCH_PRG_REPLY:
  68                 //av7110->ci_stat=data[1];
  69                 break;
  70         default:
  71                 break;
  72         }
  73 }
  74
  75
  76 void ci_get_data(struct dvb_ringbuffer *cibuf, u8 *data, int len)
  77 {
  78         if (dvb_ringbuffer_free(cibuf) < len + 2)
  79                 return;
  80
  81         DVB_RINGBUFFER_WRITE_BYTE(cibuf, len >> 8);
  82         DVB_RINGBUFFER_WRITE_BYTE(cibuf, len & 0xff);
  83         dvb_ringbuffer_write(cibuf, data, len);
  84         wake_up_interruptible(&cibuf->queue);
  85 }
  86
  87
  88 /******************************************************************************
  89  * CI link layer file ops
  90  ******************************************************************************/
  91
  92 static int ci_ll_init(struct dvb_ringbuffer *cirbuf, struct dvb_ringbuffer *ciwbuf, int size)
  93 {
  94         struct dvb_ringbuffer *tab[] = { cirbuf, ciwbuf, NULL }, **p;
  95         void *data;
  96
  97         for (p = tab; *p; p++) {
  98                 data = vmalloc(size);
  99                 if (!data) {
 100                         while (p-- != tab) {
 101                                 vfree(p[0]->data);
 102                                 p[0]->data = NULL;
 103                         }
 104                         return -ENOMEM;
 105                 }
 106                 dvb_ringbuffer_init(*p, data, size);
 107         }
 108         return 0;
 109 }
 110
 111 static void ci_ll_flush(struct dvb_ringbuffer *cirbuf, struct dvb_ringbuffer *ciwbuf)
 112 {
 113         dvb_ringbuffer_flush_spinlock_wakeup(cirbuf);
 114         dvb_ringbuffer_flush_spinlock_wakeup(ciwbuf);
 115 }
 116
 117 static void ci_ll_release(struct dvb_ringbuffer *cirbuf, struct dvb_ringbuffer *ciwbuf)
 118 {
 119         vfree(cirbuf->data);
 120         cirbuf->data = NULL;
 121         vfree(ciwbuf->data);
 122         ciwbuf->data = NULL;
 123 }
 124
 125 static int ci_ll_reset(struct dvb_ringbuffer *cibuf, struct file *file,
 126                 int slots, ca_slot_info_t *slot)
 127 {
 128         int i;
 129         int len = 0;
 130         u8 msg[8] = { 0x00, 0x06, 0x00, 0x00, 0xff, 0x02, 0x00, 0x00 };
 131
 132         for (i = 0; i < 2; i++) {
 133                 if (slots & (1 << i))
 134                         len += 8;
 135         }
 136
 137         if (dvb_ringbuffer_free(cibuf) < len)
 138                 return -EBUSY;
 139
 140         for (i = 0; i < 2; i++) {
 141                 if (slots & (1 << i)) {
 142                         msg[2] = i;
 143                         dvb_ringbuffer_write(cibuf, msg, 8);
 144                         slot[i].flags = 0;
 145                 }
 146         }
 147
 148         return 0;
 149 }
 150
 151 static ssize_t ci_ll_write(struct dvb_ringbuffer *cibuf, struct file *file,
 152                            const char __user *buf, size_t count, loff_t *ppos)
 153 {
 154         int free;
 155         int non_blocking = file->f_flags & O_NONBLOCK;
 156         char *page = (char *)__get_free_page(GFP_USER);
 157         int res;
 158
 159         if (!page)
 160                 return -ENOMEM;
 161
 162         res = -EINVAL;
 163         if (count > 2048)
 164                 goto out;
 165
 166         res = -EFAULT;
 167         if (copy_from_user(page, buf, count))
 168                 goto out;
 169
 170         free = dvb_ringbuffer_free(cibuf);
 171         if (count + 2 > free) {
 172                 res = -EWOULDBLOCK;
 173                 if (non_blocking)
 174                         goto out;
 175                 res = -ERESTARTSYS;
 176                 if (wait_event_interruptible(cibuf->queue,
 177                                              (dvb_ringbuffer_free(cibuf) >= count + 2)))
 178                         goto out;
 179         }
 180
 181         DVB_RINGBUFFER_WRITE_BYTE(cibuf, count >> 8);
 182         DVB_RINGBUFFER_WRITE_BYTE(cibuf, count & 0xff);
 183
 184         res = dvb_ringbuffer_write(cibuf, page, count);
 185 out:
 186         free_page((unsigned long)page);
 187         return res;
 188 }
 189
 190 static ssize_t ci_ll_read(struct dvb_ringbuffer *cibuf, struct file *file,
 191                           char __user *buf, size_t count, loff_t *ppos)
 192 {
 193         int avail;
 194         int non_blocking = file->f_flags & O_NONBLOCK;
 195         ssize_t len;
 196
 197         if (!cibuf->data || !count)
 198                 return 0;
 199         if (non_blocking && (dvb_ringbuffer_empty(cibuf)))
 200                 return -EWOULDBLOCK;
 201         if (wait_event_interruptible(cibuf->queue,
 202                                      !dvb_ringbuffer_empty(cibuf)))
 203                 return -ERESTARTSYS;
 204         avail = dvb_ringbuffer_avail(cibuf);
 205         if (avail < 4)
 206                 return 0;
 207         len = DVB_RINGBUFFER_PEEK(cibuf, 0) << 8;
 208         len |= DVB_RINGBUFFER_PEEK(cibuf, 1);
 209         if (avail < len + 2 || count < len)
 210                 return -EINVAL;
 211         DVB_RINGBUFFER_SKIP(cibuf, 2);
 212
 213         return dvb_ringbuffer_read(cibuf, buf, len, 1);
 214 }
 215
 216 static int dvb_ca_open(struct inode *inode, struct file *file)
 217 {
 218         struct dvb_device *dvbdev = (struct dvb_device *) file->private_data;
 219         struct av7110 *av7110 = (struct av7110 *) dvbdev->priv;
 220         int err = dvb_generic_open(inode, file);
 221
 222         dprintk(8, "av7110:%p\n",av7110);
 223
 224         if (err < 0)
 225                 return err;
 226         ci_ll_flush(&av7110->ci_rbuffer, &av7110->ci_wbuffer);
 227         return 0;
 228 }
 229
 230 static unsigned int dvb_ca_poll (struct file *file, poll_table *wait)
 231 {
 232         struct dvb_device *dvbdev = (struct dvb_device *) file->private_data;
 233         struct av7110 *av7110 = (struct av7110 *) dvbdev->priv;
 234         struct dvb_ringbuffer *rbuf = &av7110->ci_rbuffer;
 235         struct dvb_ringbuffer *wbuf = &av7110->ci_wbuffer;
 236         unsigned int mask = 0;
 237
 238         dprintk(8, "av7110:%p\n",av7110);
 239
 240         poll_wait(file, &rbuf->queue, wait);
 241         poll_wait(file, &wbuf->queue, wait);
 242
 243         if (!dvb_ringbuffer_empty(rbuf))
 244                 mask |= (POLLIN | POLLRDNORM);
 245
 246         if (dvb_ringbuffer_free(wbuf) > 1024)
 247                 mask |= (POLLOUT | POLLWRNORM);
 248
 249         return mask;
 250 }
 251
 252 static int dvb_ca_ioctl(struct inode *inode, struct file *file,
 253                  unsigned int cmd, void *parg)
 254 {
 255         struct dvb_device *dvbdev = (struct dvb_device *) file->private_data;
 256         struct av7110 *av7110 = (struct av7110 *) dvbdev->priv;
 257         unsigned long arg = (unsigned long) parg;
 258
 259         dprintk(8, "av7110:%p\n",av7110);
 260
 261         switch (cmd) {
 262         case CA_RESET:
 263                 return ci_ll_reset(&av7110->ci_wbuffer, file, arg, &av7110->ci_slot[0]);
 264                 break;
 265         case CA_GET_CAP:
 266         {
 267                 ca_caps_t cap;
 268
 269                 cap.slot_num = 2;
 270                 cap.slot_type = (FW_CI_LL_SUPPORT(av7110->arm_app) ?
 271                                  CA_CI_LINK : CA_CI) | CA_DESCR;
 272                 cap.descr_num = 16;
 273                 cap.descr_type = CA_ECD;
 274                 memcpy(parg, &cap, sizeof(cap));
 275                 break;
 276         }
 277
 278         case CA_GET_SLOT_INFO:
 279         {
 280                 ca_slot_info_t *info=(ca_slot_info_t *)parg;
 281
 282                 if (info->num > 1)
 283                         return -EINVAL;
 284                 av7110->ci_slot[info->num].num = info->num;
 285                 av7110->ci_slot[info->num].type = FW_CI_LL_SUPPORT(av7110->arm_app) ?
 286                                                         CA_CI_LINK : CA_CI;
 287                 memcpy(info, &av7110->ci_slot[info->num], sizeof(ca_slot_info_t));
 288                 break;
 289         }
 290
 291         case CA_GET_MSG:
 292                 break;
 293
 294         case CA_SEND_MSG:
 295                 break;
 296
 297         case CA_GET_DESCR_INFO:
 298         {
 299                 ca_descr_info_t info;
 300
 301                 info.num = 16;
 302                 info.type = CA_ECD;
 303                 memcpy(parg, &info, sizeof (info));
 304                 break;
 305         }
 306
 307         case CA_SET_DESCR:
 308         {
 309                 ca_descr_t *descr = (ca_descr_t*) parg;
 310
 311                 if (descr->index >= 16)
 312                         return -EINVAL;
 313                 if (descr->parity > 1)
 314                         return -EINVAL;
 315                 av7110_fw_cmd(av7110, COMTYPE_PIDFILTER, SetDescr, 5,
 316                               (descr->index<<8)|descr->parity,
 317                               (descr->cw[0]<<8)|descr->cw[1],
 318                               (descr->cw[2]<<8)|descr->cw[3],
 319                               (descr->cw[4]<<8)|descr->cw[5],
 320                               (descr->cw[6]<<8)|descr->cw[7]);
 321                 break;
 322         }
 323
 324         default:
 325                 return -EINVAL;
 326         }
 327         return 0;
 328 }
 329
 330 static ssize_t dvb_ca_write(struct file *file, const char __user *buf,
 331                             size_t count, loff_t *ppos)
 332 {
 333         struct dvb_device *dvbdev = (struct dvb_device *) file->private_data;
 334         struct av7110 *av7110 = (struct av7110 *) dvbdev->priv;
 335
 336         dprintk(8, "av7110:%p\n",av7110);
 337         return ci_ll_write(&av7110->ci_wbuffer, file, buf, count, ppos);
 338 }
 339
 340 static ssize_t dvb_ca_read(struct file *file, char __user *buf,
 341                            size_t count, loff_t *ppos)
 342 {
 343         struct dvb_device *dvbdev = (struct dvb_device *) file->private_data;
 344         struct av7110 *av7110 = (struct av7110 *) dvbdev->priv;
 345
 346         dprintk(8, "av7110:%p\n",av7110);
 347         return ci_ll_read(&av7110->ci_rbuffer, file, buf, count, ppos);
 348 }
 349
 350
 351
 352 static struct file_operations dvb_ca_fops = {
 353         .owner          = THIS_MODULE,
 354         .read           = dvb_ca_read,
 355         .write          = dvb_ca_write,
 356         .ioctl          = dvb_generic_ioctl,
 357         .open           = dvb_ca_open,
 358         .release        = dvb_generic_release,
 359         .poll           = dvb_ca_poll,
 360 };
 361
 362 static struct dvb_device dvbdev_ca = {
 363         .priv           = NULL,
 364         .users          = 1,
 365         .writers        = 1,
 366         .fops           = &dvb_ca_fops,
 367         .kernel_ioctl   = dvb_ca_ioctl,
 368 };
 369
 370
 371 int av7110_ca_register(struct av7110 *av7110)
 372 {
 373         return dvb_register_device(av7110->dvb_adapter, &av7110->ca_dev,
 374                                    &dvbdev_ca, av7110, DVB_DEVICE_CA);
 375 }
 376
 377 void av7110_ca_unregister(struct av7110 *av7110)
 378 {
 379         dvb_unregister_device(av7110->ca_dev);
 380 }
 381
 382 int av7110_ca_init(struct av7110* av7110)
 383 {
 384         return ci_ll_init(&av7110->ci_rbuffer, &av7110->ci_wbuffer, 8192);
 385 }
 386
 387 void av7110_ca_exit(struct av7110* av7110)
 388 {
 389         ci_ll_release(&av7110->ci_rbuffer, &av7110->ci_wbuffer);
 390 }