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/types.h>
  33 #include <linux/delay.h>
  34 #include <linux/fs.h>
  35 #include <linux/timer.h>
  36 #include <linux/poll.h>
  37
  38 #include "av7110.h"
  39 #include "av7110_hw.h"
  40 #include "av7110_ca.h"
  41
  42
  43 void CI_handle(struct av7110 *av7110, u8 *data, u16 len)
  44 {
  45         dprintk(8, "av7110:%p\n",av7110);
  46
  47         if (len < 3)
  48                 return;
  49         switch (data[0]) {
  50         case CI_MSG_CI_INFO:
  51                 if (data[2] != 1 && data[2] != 2)
  52                         break;
  53                 switch (data[1]) {
  54                 case 0:
  55                         av7110->ci_slot[data[2] - 1].flags = 0;
  56                         break;
  57                 case 1:
  58                         av7110->ci_slot[data[2] - 1].flags |= CA_CI_MODULE_PRESENT;
  59                         break;
  60                 case 2:
  61                         av7110->ci_slot[data[2] - 1].flags |= CA_CI_MODULE_READY;
  62                         break;
  63                 }
  64                 break;
  65         case CI_SWITCH_PRG_REPLY:
  66                 //av7110->ci_stat=data[1];
  67                 break;
  68         default:
  69                 break;
  70         }
  71 }
  72
  73
  74 void ci_get_data(struct dvb_ringbuffer *cibuf, u8 *data, int len)
  75 {
  76         if (dvb_ringbuffer_free(cibuf) < len + 2)
  77                 return;
  78
  79         DVB_RINGBUFFER_WRITE_BYTE(cibuf, len >> 8);
  80         DVB_RINGBUFFER_WRITE_BYTE(cibuf, len & 0xff);
  81         dvb_ringbuffer_write(cibuf, data, len);
  82         wake_up_interruptible(&cibuf->queue);
  83 }
  84
  85
  86 /******************************************************************************
  87  * CI link layer file ops
  88  ******************************************************************************/
  89
  90 static int ci_ll_init(struct dvb_ringbuffer *cirbuf, struct dvb_ringbuffer *ciwbuf, int size)
  91 {
  92         struct dvb_ringbuffer *tab[] = { cirbuf, ciwbuf, NULL }, **p;
  93         void *data;
  94
  95         for (p = tab; *p; p++) {
  96                 data = vmalloc(size);
  97                 if (!data) {
  98                         while (p-- != tab) {
  99                                 vfree(p[0]->data);
 100                                 p[0]->data = NULL;
 101                         }
 102                         return -ENOMEM;
 103                 }
 104                 dvb_ringbuffer_init(*p, data, size);
 105         }
 106         return 0;
 107 }
 108
 109 static void ci_ll_flush(struct dvb_ringbuffer *cirbuf, struct dvb_ringbuffer *ciwbuf)
 110 {
 111         dvb_ringbuffer_flush_spinlock_wakeup(cirbuf);
 112         dvb_ringbuffer_flush_spinlock_wakeup(ciwbuf);
 113 }
 114
 115 static void ci_ll_release(struct dvb_ringbuffer *cirbuf, struct dvb_ringbuffer *ciwbuf)
 116 {
 117         vfree(cirbuf->data);
 118         cirbuf->data = NULL;
 119         vfree(ciwbuf->data);
 120         ciwbuf->data = NULL;
 121 }
 122
 123 static int ci_ll_reset(struct dvb_ringbuffer *cibuf, struct file *file,
 124                        int slots, ca_slot_info_t *slot)
 125 {
 126         int i;
 127         int len = 0;
 128         u8 msg[8] = { 0x00, 0x06, 0x00, 0x00, 0xff, 0x02, 0x00, 0x00 };
 129
 130         for (i = 0; i < 2; i++) {
 131                 if (slots & (1 << i))
 132                         len += 8;
 133         }
 134
 135         if (dvb_ringbuffer_free(cibuf) < len)
 136                 return -EBUSY;
 137
 138         for (i = 0; i < 2; i++) {
 139                 if (slots & (1 << i)) {
 140                         msg[2] = i;
 141                         dvb_ringbuffer_write(cibuf, msg, 8);
 142                         slot[i].flags = 0;
 143                 }
 144         }
 145
 146         return 0;
 147 }
 148
 149 static ssize_t ci_ll_write(struct dvb_ringbuffer *cibuf, struct file *file,
 150                            const char __user *buf, size_t count, loff_t *ppos)
 151 {
 152         int free;
 153         int non_blocking = file->f_flags & O_NONBLOCK;
 154         u8 *page = (u8 *)__get_free_page(GFP_USER);
 155         int res;
 156
 157         if (!page)
 158                 return -ENOMEM;
 159
 160         res = -EINVAL;
 161         if (count > 2048)
 162                 goto out;
 163
 164         res = -EFAULT;
 165         if (copy_from_user(page, buf, count))
 166                 goto out;
 167
 168         free = dvb_ringbuffer_free(cibuf);
 169         if (count + 2 > free) {
 170                 res = -EWOULDBLOCK;
 171                 if (non_blocking)
 172                         goto out;
 173                 res = -ERESTARTSYS;
 174                 if (wait_event_interruptible(cibuf->queue,
 175                                              (dvb_ringbuffer_free(cibuf) >= count + 2)))
 176                         goto out;
 177         }
 178
 179         DVB_RINGBUFFER_WRITE_BYTE(cibuf, count >> 8);
 180         DVB_RINGBUFFER_WRITE_BYTE(cibuf, count & 0xff);
 181
 182         res = dvb_ringbuffer_write(cibuf, page, count);
 183 out:
 184         free_page((unsigned long)page);
 185         return res;
 186 }
 187
 188 static ssize_t ci_ll_read(struct dvb_ringbuffer *cibuf, struct file *file,
 189                           char __user *buf, size_t count, loff_t *ppos)
 190 {
 191         int avail;
 192         int non_blocking = file->f_flags & O_NONBLOCK;
 193         ssize_t len;
 194
 195         if (!cibuf->data || !count)
 196                 return 0;
 197         if (non_blocking && (dvb_ringbuffer_empty(cibuf)))
 198                 return -EWOULDBLOCK;
 199         if (wait_event_interruptible(cibuf->queue,
 200                                      !dvb_ringbuffer_empty(cibuf)))
 201                 return -ERESTARTSYS;
 202         avail = dvb_ringbuffer_avail(cibuf);
 203         if (avail < 4)
 204                 return 0;
 205         len = DVB_RINGBUFFER_PEEK(cibuf, 0) << 8;
 206         len |= DVB_RINGBUFFER_PEEK(cibuf, 1);
 207         if (avail < len + 2 || count < len)
 208                 return -EINVAL;
 209         DVB_RINGBUFFER_SKIP(cibuf, 2);
 210
 211         return dvb_ringbuffer_read_user(cibuf, buf, len);
 212 }
 213
 214 static int dvb_ca_open(struct inode *inode, struct file *file)
 215 {
 216         struct dvb_device *dvbdev = file->private_data;
 217         struct av7110 *av7110 = dvbdev->priv;
 218         int err = dvb_generic_open(inode, file);
 219
 220         dprintk(8, "av7110:%p\n",av7110);
 221
 222         if (err < 0)
 223                 return err;
 224         ci_ll_flush(&av7110->ci_rbuffer, &av7110->ci_wbuffer);
 225         return 0;
 226 }
 227
 228 static unsigned int dvb_ca_poll (struct file *file, poll_table *wait)
 229 {
 230         struct dvb_device *dvbdev = file->private_data;
 231         struct av7110 *av7110 = dvbdev->priv;
 232         struct dvb_ringbuffer *rbuf = &av7110->ci_rbuffer;
 233         struct dvb_ringbuffer *wbuf = &av7110->ci_wbuffer;
 234         unsigned int mask = 0;
 235
 236         dprintk(8, "av7110:%p\n",av7110);
 237
 238         poll_wait(file, &rbuf->queue, wait);
 239         poll_wait(file, &wbuf->queue, wait);
 240
 241         if (!dvb_ringbuffer_empty(rbuf))
 242                 mask |= (POLLIN | POLLRDNORM);
 243
 244         if (dvb_ringbuffer_free(wbuf) > 1024)
 245                 mask |= (POLLOUT | POLLWRNORM);
 246
 247         return mask;
 248 }
 249
 250 static int dvb_ca_ioctl(struct inode *inode, struct file *file,
 251                  unsigned int cmd, void *parg)
 252 {
 253         struct dvb_device *dvbdev = file->private_data;
 254         struct av7110 *av7110 = dvbdev->priv;
 255         unsigned long arg = (unsigned long) parg;
 256
 257         dprintk(8, "av7110:%p\n",av7110);
 258
 259         switch (cmd) {
 260         case CA_RESET:
 261                 return ci_ll_reset(&av7110->ci_wbuffer, file, arg, &av7110->ci_slot[0]);
 262                 break;
 263         case CA_GET_CAP:
 264         {
 265                 ca_caps_t cap;
 266
 267                 cap.slot_num = 2;
 268                 cap.slot_type = (FW_CI_LL_SUPPORT(av7110->arm_app) ?
 269                                  CA_CI_LINK : CA_CI) | CA_DESCR;
 270                 cap.descr_num = 16;
 271                 cap.descr_type = CA_ECD;
 272                 memcpy(parg, &cap, sizeof(cap));
 273                 break;
 274         }
 275
 276         case CA_GET_SLOT_INFO:
 277         {
 278                 ca_slot_info_t *info=(ca_slot_info_t *)parg;
 279
 280                 if (info->num > 1)
 281                         return -EINVAL;
 282                 av7110->ci_slot[info->num].num = info->num;
 283                 av7110->ci_slot[info->num].type = FW_CI_LL_SUPPORT(av7110->arm_app) ?
 284                                                         CA_CI_LINK : CA_CI;
 285                 memcpy(info, &av7110->ci_slot[info->num], sizeof(ca_slot_info_t));
 286                 break;
 287         }
 288
 289         case CA_GET_MSG:
 290                 break;
 291
 292         case CA_SEND_MSG:
 293                 break;
 294
 295         case CA_GET_DESCR_INFO:
 296         {
 297                 ca_descr_info_t info;
 298
 299                 info.num = 16;
 300                 info.type = CA_ECD;
 301                 memcpy(parg, &info, sizeof (info));
 302                 break;
 303         }
 304
 305         case CA_SET_DESCR:
 306         {
 307                 ca_descr_t *descr = (ca_descr_t*) parg;
 308
 309                 if (descr->index >= 16)
 310                         return -EINVAL;
 311                 if (descr->parity > 1)
 312                         return -EINVAL;
 313                 av7110_fw_cmd(av7110, COMTYPE_PIDFILTER, SetDescr, 5,
 314                               (descr->index<<8)|descr->parity,
 315                               (descr->cw[0]<<8)|descr->cw[1],
 316                               (descr->cw[2]<<8)|descr->cw[3],
 317                               (descr->cw[4]<<8)|descr->cw[5],
 318                               (descr->cw[6]<<8)|descr->cw[7]);
 319                 break;
 320         }
 321
 322         default:
 323                 return -EINVAL;
 324         }
 325         return 0;
 326 }
 327
 328 static ssize_t dvb_ca_write(struct file *file, const char __user *buf,
 329                             size_t count, loff_t *ppos)
 330 {
 331         struct dvb_device *dvbdev = file->private_data;
 332         struct av7110 *av7110 = dvbdev->priv;
 333
 334         dprintk(8, "av7110:%p\n",av7110);
 335         return ci_ll_write(&av7110->ci_wbuffer, file, buf, count, ppos);
 336 }
 337
 338 static ssize_t dvb_ca_read(struct file *file, char __user *buf,
 339                            size_t count, loff_t *ppos)
 340 {
 341         struct dvb_device *dvbdev = file->private_data;
 342         struct av7110 *av7110 = dvbdev->priv;
 343
 344         dprintk(8, "av7110:%p\n",av7110);
 345         return ci_ll_read(&av7110->ci_rbuffer, file, buf, count, ppos);
 346 }
 347
 348 static const struct file_operations dvb_ca_fops = {
 349         .owner          = THIS_MODULE,
 350         .read           = dvb_ca_read,
 351         .write          = dvb_ca_write,
 352         .ioctl          = dvb_generic_ioctl,
 353         .open           = dvb_ca_open,
 354         .release        = dvb_generic_release,
 355         .poll           = dvb_ca_poll,
 356 };
 357
 358 static struct dvb_device dvbdev_ca = {
 359         .priv           = NULL,
 360         .users          = 1,
 361         .writers        = 1,
 362         .fops           = &dvb_ca_fops,
 363         .kernel_ioctl   = dvb_ca_ioctl,
 364 };
 365
 366
 367 int av7110_ca_register(struct av7110 *av7110)
 368 {
 369         return dvb_register_device(&av7110->dvb_adapter, &av7110->ca_dev,
 370                                    &dvbdev_ca, av7110, DVB_DEVICE_CA);
 371 }
 372
 373 void av7110_ca_unregister(struct av7110 *av7110)
 374 {
 375         dvb_unregister_device(av7110->ca_dev);
 376 }
 377
 378 int av7110_ca_init(struct av7110* av7110)
 379 {
 380         return ci_ll_init(&av7110->ci_rbuffer, &av7110->ci_wbuffer, 8192);
 381 }
 382
 383 void av7110_ca_exit(struct av7110* av7110)
 384 {
 385         ci_ll_release(&av7110->ci_rbuffer, &av7110->ci_wbuffer);
 386 }