drivers/media/pci/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  * To obtain the license, point your browser to
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  *
  25  * the project's page is at https://linuxtv.org
  26  */
  27
  28 #include <linux/kernel.h>
  29 #include <linux/types.h>
  30 #include <linux/delay.h>
  31 #include <linux/fs.h>
  32 #include <linux/timer.h>
  33 #include <linux/poll.h>
  34 #include <linux/gfp.h>
  35
  36 #include "av7110.h"
  37 #include "av7110_hw.h"
  38 #include "av7110_ca.h"
  39
  40
  41 void CI_handle(struct av7110 *av7110, u8 *data, u16 len)
  42 {
  43         dprintk(8, "av7110:%p\n",av7110);
  44
  45         if (len < 3)
  46                 return;
  47         switch (data[0]) {
  48         case CI_MSG_CI_INFO:
  49                 if (data[2] != 1 && data[2] != 2)
  50                         break;
  51                 switch (data[1]) {
  52                 case 0:
  53                         av7110->ci_slot[data[2] - 1].flags = 0;
  54                         break;
  55                 case 1:
  56                         av7110->ci_slot[data[2] - 1].flags |= CA_CI_MODULE_PRESENT;
  57                         break;
  58                 case 2:
  59                         av7110->ci_slot[data[2] - 1].flags |= CA_CI_MODULE_READY;
  60                         break;
  61                 }
  62                 break;
  63         case CI_SWITCH_PRG_REPLY:
  64                 //av7110->ci_stat=data[1];
  65                 break;
  66         default:
  67                 break;
  68         }
  69 }
  70
  71
  72 void ci_get_data(struct dvb_ringbuffer *cibuf, u8 *data, int len)
  73 {
  74         if (dvb_ringbuffer_free(cibuf) < len + 2)
  75                 return;
  76
  77         DVB_RINGBUFFER_WRITE_BYTE(cibuf, len >> 8);
  78         DVB_RINGBUFFER_WRITE_BYTE(cibuf, len & 0xff);
  79         dvb_ringbuffer_write(cibuf, data, len);
  80         wake_up_interruptible(&cibuf->queue);
  81 }
  82
  83
  84 /******************************************************************************
  85  * CI link layer file ops
  86  ******************************************************************************/
  87
  88 static int ci_ll_init(struct dvb_ringbuffer *cirbuf, struct dvb_ringbuffer *ciwbuf, int size)
  89 {
  90         struct dvb_ringbuffer *tab[] = { cirbuf, ciwbuf, NULL }, **p;
  91         void *data;
  92
  93         for (p = tab; *p; p++) {
  94                 data = vmalloc(size);
  95                 if (!data) {
  96                         while (p-- != tab) {
  97                                 vfree(p[0]->data);
  98                                 p[0]->data = NULL;
  99                         }
 100                         return -ENOMEM;
 101                 }
 102                 dvb_ringbuffer_init(*p, data, size);
 103         }
 104         return 0;
 105 }
 106
 107 static void ci_ll_flush(struct dvb_ringbuffer *cirbuf, struct dvb_ringbuffer *ciwbuf)
 108 {
 109         dvb_ringbuffer_flush_spinlock_wakeup(cirbuf);
 110         dvb_ringbuffer_flush_spinlock_wakeup(ciwbuf);
 111 }
 112
 113 static void ci_ll_release(struct dvb_ringbuffer *cirbuf, struct dvb_ringbuffer *ciwbuf)
 114 {
 115         vfree(cirbuf->data);
 116         cirbuf->data = NULL;
 117         vfree(ciwbuf->data);
 118         ciwbuf->data = NULL;
 119 }
 120
 121 static int ci_ll_reset(struct dvb_ringbuffer *cibuf, struct file *file,
 122                        int slots, struct ca_slot_info *slot)
 123 {
 124         int i;
 125         int len = 0;
 126         u8 msg[8] = { 0x00, 0x06, 0x00, 0x00, 0xff, 0x02, 0x00, 0x00 };
 127
 128         for (i = 0; i < 2; i++) {
 129                 if (slots & (1 << i))
 130                         len += 8;
 131         }
 132
 133         if (dvb_ringbuffer_free(cibuf) < len)
 134                 return -EBUSY;
 135
 136         for (i = 0; i < 2; i++) {
 137                 if (slots & (1 << i)) {
 138                         msg[2] = i;
 139                         dvb_ringbuffer_write(cibuf, msg, 8);
 140                         slot[i].flags = 0;
 141                 }
 142         }
 143
 144         return 0;
 145 }
 146
 147 static ssize_t ci_ll_write(struct dvb_ringbuffer *cibuf, struct file *file,
 148                            const char __user *buf, size_t count, loff_t *ppos)
 149 {
 150         int free;
 151         int non_blocking = file->f_flags & O_NONBLOCK;
 152         u8 *page = (u8 *)__get_free_page(GFP_USER);
 153         int res;
 154
 155         if (!page)
 156                 return -ENOMEM;
 157
 158         res = -EINVAL;
 159         if (count > 2048)
 160                 goto out;
 161
 162         res = -EFAULT;
 163         if (copy_from_user(page, buf, count))
 164                 goto out;
 165
 166         free = dvb_ringbuffer_free(cibuf);
 167         if (count + 2 > free) {
 168                 res = -EWOULDBLOCK;
 169                 if (non_blocking)
 170                         goto out;
 171                 res = -ERESTARTSYS;
 172                 if (wait_event_interruptible(cibuf->queue,
 173                                              (dvb_ringbuffer_free(cibuf) >= count + 2)))
 174                         goto out;
 175         }
 176
 177         DVB_RINGBUFFER_WRITE_BYTE(cibuf, count >> 8);
 178         DVB_RINGBUFFER_WRITE_BYTE(cibuf, count & 0xff);
 179
 180         res = dvb_ringbuffer_write(cibuf, page, count);
 181 out:
 182         free_page((unsigned long)page);
 183         return res;
 184 }
 185
 186 static ssize_t ci_ll_read(struct dvb_ringbuffer *cibuf, struct file *file,
 187                           char __user *buf, size_t count, loff_t *ppos)
 188 {
 189         int avail;
 190         int non_blocking = file->f_flags & O_NONBLOCK;
 191         ssize_t len;
 192
 193         if (!cibuf->data || !count)
 194                 return 0;
 195         if (non_blocking && (dvb_ringbuffer_empty(cibuf)))
 196                 return -EWOULDBLOCK;
 197         if (wait_event_interruptible(cibuf->queue,
 198                                      !dvb_ringbuffer_empty(cibuf)))
 199                 return -ERESTARTSYS;
 200         avail = dvb_ringbuffer_avail(cibuf);
 201         if (avail < 4)
 202                 return 0;
 203         len = DVB_RINGBUFFER_PEEK(cibuf, 0) << 8;
 204         len |= DVB_RINGBUFFER_PEEK(cibuf, 1);
 205         if (avail < len + 2 || count < len)
 206                 return -EINVAL;
 207         DVB_RINGBUFFER_SKIP(cibuf, 2);
 208
 209         return dvb_ringbuffer_read_user(cibuf, buf, len);
 210 }
 211
 212 static int dvb_ca_open(struct inode *inode, struct file *file)
 213 {
 214         struct dvb_device *dvbdev = file->private_data;
 215         struct av7110 *av7110 = dvbdev->priv;
 216         int err = dvb_generic_open(inode, file);
 217
 218         dprintk(8, "av7110:%p\n",av7110);
 219
 220         if (err < 0)
 221                 return err;
 222         ci_ll_flush(&av7110->ci_rbuffer, &av7110->ci_wbuffer);
 223         return 0;
 224 }
 225
 226 static __poll_t dvb_ca_poll (struct file *file, poll_table *wait)
 227 {
 228         struct dvb_device *dvbdev = file->private_data;
 229         struct av7110 *av7110 = dvbdev->priv;
 230         struct dvb_ringbuffer *rbuf = &av7110->ci_rbuffer;
 231         struct dvb_ringbuffer *wbuf = &av7110->ci_wbuffer;
 232         __poll_t mask = 0;
 233
 234         dprintk(8, "av7110:%p\n",av7110);
 235
 236         poll_wait(file, &rbuf->queue, wait);
 237         poll_wait(file, &wbuf->queue, wait);
 238
 239         if (!dvb_ringbuffer_empty(rbuf))
 240                 mask |= (EPOLLIN | EPOLLRDNORM);
 241
 242         if (dvb_ringbuffer_free(wbuf) > 1024)
 243                 mask |= (EPOLLOUT | EPOLLWRNORM);
 244
 245         return mask;
 246 }
 247
 248 static int dvb_ca_ioctl(struct file *file, unsigned int cmd, void *parg)
 249 {
 250         struct dvb_device *dvbdev = file->private_data;
 251         struct av7110 *av7110 = dvbdev->priv;
 252         unsigned long arg = (unsigned long) parg;
 253         int ret = 0;
 254
 255         dprintk(8, "av7110:%p\n",av7110);
 256
 257         if (mutex_lock_interruptible(&av7110->ioctl_mutex))
 258                 return -ERESTARTSYS;
 259
 260         switch (cmd) {
 261         case CA_RESET:
 262                 ret = ci_ll_reset(&av7110->ci_wbuffer, file, arg,
 263                                   &av7110->ci_slot[0]);
 264                 break;
 265         case CA_GET_CAP:
 266         {
 267                 struct ca_caps 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                 struct ca_slot_info *info=(struct ca_slot_info *)parg;
 281
 282                 if (info->num < 0 || info->num > 1) {
 283                         mutex_unlock(&av7110->ioctl_mutex);
 284                         return -EINVAL;
 285                 }
 286                 av7110->ci_slot[info->num].num = info->num;
 287                 av7110->ci_slot[info->num].type = FW_CI_LL_SUPPORT(av7110->arm_app) ?
 288                                                         CA_CI_LINK : CA_CI;
 289                 memcpy(info, &av7110->ci_slot[info->num], sizeof(struct ca_slot_info));
 290                 break;
 291         }
 292
 293         case CA_GET_MSG:
 294                 break;
 295
 296         case CA_SEND_MSG:
 297                 break;
 298
 299         case CA_GET_DESCR_INFO:
 300         {
 301                 struct ca_descr_info info;
 302
 303                 info.num = 16;
 304                 info.type = CA_ECD;
 305                 memcpy(parg, &info, sizeof (info));
 306                 break;
 307         }
 308
 309         case CA_SET_DESCR:
 310         {
 311                 struct ca_descr *descr = (struct ca_descr*) parg;
 312
 313                 if (descr->index >= 16 || descr->parity > 1) {
 314                         mutex_unlock(&av7110->ioctl_mutex);
 315                         return -EINVAL;
 316                 }
 317                 av7110_fw_cmd(av7110, COMTYPE_PIDFILTER, SetDescr, 5,
 318                               (descr->index<<8)|descr->parity,
 319                               (descr->cw[0]<<8)|descr->cw[1],
 320                               (descr->cw[2]<<8)|descr->cw[3],
 321                               (descr->cw[4]<<8)|descr->cw[5],
 322                               (descr->cw[6]<<8)|descr->cw[7]);
 323                 break;
 324         }
 325
 326         default:
 327                 ret = -EINVAL;
 328                 break;
 329         }
 330
 331         mutex_unlock(&av7110->ioctl_mutex);
 332         return ret;
 333 }
 334
 335 static ssize_t dvb_ca_write(struct file *file, const char __user *buf,
 336                             size_t count, loff_t *ppos)
 337 {
 338         struct dvb_device *dvbdev = file->private_data;
 339         struct av7110 *av7110 = dvbdev->priv;
 340
 341         dprintk(8, "av7110:%p\n",av7110);
 342         return ci_ll_write(&av7110->ci_wbuffer, file, buf, count, ppos);
 343 }
 344
 345 static ssize_t dvb_ca_read(struct file *file, char __user *buf,
 346                            size_t count, loff_t *ppos)
 347 {
 348         struct dvb_device *dvbdev = file->private_data;
 349         struct av7110 *av7110 = dvbdev->priv;
 350
 351         dprintk(8, "av7110:%p\n",av7110);
 352         return ci_ll_read(&av7110->ci_rbuffer, file, buf, count, ppos);
 353 }
 354
 355 static const struct file_operations dvb_ca_fops = {
 356         .owner          = THIS_MODULE,
 357         .read           = dvb_ca_read,
 358         .write          = dvb_ca_write,
 359         .unlocked_ioctl = dvb_generic_ioctl,
 360         .open           = dvb_ca_open,
 361         .release        = dvb_generic_release,
 362         .poll           = dvb_ca_poll,
 363         .llseek         = default_llseek,
 364 };
 365
 366 static struct dvb_device dvbdev_ca = {
 367         .priv           = NULL,
 368         .users          = 1,
 369         .writers        = 1,
 370         .fops           = &dvb_ca_fops,
 371         .kernel_ioctl   = dvb_ca_ioctl,
 372 };
 373
 374
 375 int av7110_ca_register(struct av7110 *av7110)
 376 {
 377         return dvb_register_device(&av7110->dvb_adapter, &av7110->ca_dev,
 378                                    &dvbdev_ca, av7110, DVB_DEVICE_CA, 0);
 379 }
 380
 381 void av7110_ca_unregister(struct av7110 *av7110)
 382 {
 383         dvb_unregister_device(av7110->ca_dev);
 384 }
 385
 386 int av7110_ca_init(struct av7110* av7110)
 387 {
 388         return ci_ll_init(&av7110->ci_rbuffer, &av7110->ci_wbuffer, 8192);
 389 }
 390
 391 void av7110_ca_exit(struct av7110* av7110)
 392 {
 393         ci_ll_release(&av7110->ci_rbuffer, &av7110->ci_wbuffer);
 394 }