drivers/staging/tm6000/tm6000-dvb.c

   1 /*
   2    tm6000-dvb.c - dvb-t support for TM5600/TM6000/TM6010 USB video capture devices
   3
   4    Copyright (C) 2007 Michel Ludwig <michel.ludwig@gmail.com>
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation version 2
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software
  17    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include <linux/kernel.h>
  21 #include <linux/slab.h>
  22 #include <linux/usb.h>
  23
  24 #include "tm6000.h"
  25 #include "tm6000-regs.h"
  26
  27 #include "zl10353.h"
  28
  29 #include <media/tuner.h>
  30
  31 #include "tuner-xc2028.h"
  32 #include "xc5000.h"
  33
  34 static void inline print_err_status (struct tm6000_core *dev,
  35                                      int packet, int status)
  36 {
  37         char *errmsg = "Unknown";
  38
  39         switch(status) {
  40         case -ENOENT:
  41                 errmsg = "unlinked synchronuously";
  42                 break;
  43         case -ECONNRESET:
  44                 errmsg = "unlinked asynchronuously";
  45                 break;
  46         case -ENOSR:
  47                 errmsg = "Buffer error (overrun)";
  48                 break;
  49         case -EPIPE:
  50                 errmsg = "Stalled (device not responding)";
  51                 break;
  52         case -EOVERFLOW:
  53                 errmsg = "Babble (bad cable?)";
  54                 break;
  55         case -EPROTO:
  56                 errmsg = "Bit-stuff error (bad cable?)";
  57                 break;
  58         case -EILSEQ:
  59                 errmsg = "CRC/Timeout (could be anything)";
  60                 break;
  61         case -ETIME:
  62                 errmsg = "Device does not respond";
  63                 break;
  64         }
  65         if (packet<0) {
  66                 dprintk(dev, 1, "URB status %d [%s].\n",
  67                         status, errmsg);
  68         } else {
  69                 dprintk(dev, 1, "URB packet %d, status %d [%s].\n",
  70                         packet, status, errmsg);
  71         }
  72 }
  73
  74 static void tm6000_urb_received(struct urb *urb)
  75 {
  76         int ret;
  77         struct tm6000_core* dev = urb->context;
  78
  79         if(urb->status != 0) {
  80                 print_err_status (dev,0,urb->status);
  81         }
  82         else if(urb->actual_length>0){
  83                 dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer,
  84                                                    urb->actual_length);
  85         }
  86
  87         if(dev->dvb->streams > 0) {
  88                 ret = usb_submit_urb(urb, GFP_ATOMIC);
  89                 if(ret < 0) {
  90                         printk(KERN_ERR "tm6000:  error %s\n", __FUNCTION__);
  91                         kfree(urb->transfer_buffer);
  92                         usb_free_urb(urb);
  93                 }
  94         }
  95 }
  96
  97 int tm6000_start_stream(struct tm6000_core *dev)
  98 {
  99         int ret;
 100         unsigned int pipe, size;
 101         struct tm6000_dvb *dvb = dev->dvb;
 102
 103         printk(KERN_INFO "tm6000: got start stream request %s\n",__FUNCTION__);
 104
 105         if (dev->mode != TM6000_MODE_DIGITAL) {
 106                 tm6000_init_digital_mode(dev);
 107                 dev->mode = TM6000_MODE_DIGITAL;
 108         }
 109
 110         dvb->bulk_urb = usb_alloc_urb(0, GFP_KERNEL);
 111         if(dvb->bulk_urb == NULL) {
 112                 printk(KERN_ERR "tm6000: couldn't allocate urb\n");
 113                 return -ENOMEM;
 114         }
 115
 116         pipe = usb_rcvbulkpipe(dev->udev, dev->bulk_in.endp->desc.bEndpointAddress
 117                                                           & USB_ENDPOINT_NUMBER_MASK);
 118
 119         size = usb_maxpacket(dev->udev, pipe, usb_pipeout(pipe));
 120         size = size * 15; /* 512 x 8 or 12 or 15 */
 121
 122         dvb->bulk_urb->transfer_buffer = kzalloc(size, GFP_KERNEL);
 123         if(dvb->bulk_urb->transfer_buffer == NULL) {
 124                 usb_free_urb(dvb->bulk_urb);
 125                 printk(KERN_ERR "tm6000: couldn't allocate transfer buffer!\n");
 126                 return -ENOMEM;
 127         }
 128
 129         usb_fill_bulk_urb(dvb->bulk_urb, dev->udev, pipe,
 130                                                  dvb->bulk_urb->transfer_buffer,
 131                                                  size,
 132                                                  tm6000_urb_received, dev);
 133
 134         ret = usb_clear_halt(dev->udev, pipe);
 135         if(ret < 0) {
 136                 printk(KERN_ERR "tm6000: error %i in %s during pipe reset\n",ret,__FUNCTION__);
 137                 return ret;
 138         }
 139         else {
 140                 printk(KERN_ERR "tm6000: pipe resetted\n");
 141         }
 142
 143 /*      mutex_lock(&tm6000_driver.open_close_mutex); */
 144         ret = usb_submit_urb(dvb->bulk_urb, GFP_KERNEL);
 145
 146 /*      mutex_unlock(&tm6000_driver.open_close_mutex); */
 147         if (ret) {
 148                 printk(KERN_ERR "tm6000: submit of urb failed (error=%i)\n",ret);
 149
 150                 kfree(dvb->bulk_urb->transfer_buffer);
 151                 usb_free_urb(dvb->bulk_urb);
 152                 return ret;
 153         }
 154
 155         return 0;
 156 }
 157
 158 void tm6000_stop_stream(struct tm6000_core *dev)
 159 {
 160         struct tm6000_dvb *dvb = dev->dvb;
 161
 162         if(dvb->bulk_urb) {
 163                 printk (KERN_INFO "urb killing\n");
 164                 usb_kill_urb(dvb->bulk_urb);
 165                 printk (KERN_INFO "urb buffer free\n");
 166                 kfree(dvb->bulk_urb->transfer_buffer);
 167                 usb_free_urb(dvb->bulk_urb);
 168                 dvb->bulk_urb = NULL;
 169         }
 170 }
 171
 172 int tm6000_start_feed(struct dvb_demux_feed *feed)
 173 {
 174         struct dvb_demux *demux = feed->demux;
 175         struct tm6000_core *dev = demux->priv;
 176         struct tm6000_dvb *dvb = dev->dvb;
 177         printk(KERN_INFO "tm6000: got start feed request %s\n",__FUNCTION__);
 178
 179         mutex_lock(&dvb->mutex);
 180         if(dvb->streams == 0) {
 181                 dvb->streams = 1;
 182 /*              mutex_init(&tm6000_dev->streming_mutex); */
 183                 tm6000_start_stream(dev);
 184         }
 185         else {
 186                 ++(dvb->streams);
 187         }
 188         mutex_unlock(&dvb->mutex);
 189
 190         return 0;
 191 }
 192
 193 int tm6000_stop_feed(struct dvb_demux_feed *feed) {
 194         struct dvb_demux *demux = feed->demux;
 195         struct tm6000_core *dev = demux->priv;
 196         struct tm6000_dvb *dvb = dev->dvb;
 197
 198         printk(KERN_INFO "tm6000: got stop feed request %s\n",__FUNCTION__);
 199
 200         mutex_lock(&dvb->mutex);
 201
 202         printk (KERN_INFO "stream %#x\n", dvb->streams);
 203         --(dvb->streams);
 204         if(dvb->streams == 0) {
 205                 printk (KERN_INFO "stop stream\n");
 206                 tm6000_stop_stream(dev);
 207 /*              mutex_destroy(&tm6000_dev->streaming_mutex); */
 208         }
 209         mutex_unlock(&dvb->mutex);
 210 /*      mutex_destroy(&tm6000_dev->streaming_mutex); */
 211
 212         return 0;
 213 }
 214
 215 int tm6000_dvb_attach_frontend(struct tm6000_core *dev)
 216 {
 217         struct tm6000_dvb *dvb = dev->dvb;
 218
 219         if(dev->caps.has_zl10353) {
 220                 struct zl10353_config config =
 221                                     {.demod_address = dev->demod_addr,
 222                                      .no_tuner = 1,
 223                                      .parallel_ts = 1,
 224                                      .if2 = 45700,
 225                                      .disable_i2c_gate_ctrl = 1,
 226                                     };
 227
 228                 dvb->frontend = dvb_attach(zl10353_attach, &config,
 229                                                            &dev->i2c_adap);
 230         }
 231         else {
 232                 printk(KERN_ERR "tm6000: no frontend defined for the device!\n");
 233                 return -1;
 234         }
 235
 236         return (!dvb->frontend) ? -1 : 0;
 237 }
 238
 239 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
 240
 241 int tm6000_dvb_register(struct tm6000_core *dev)
 242 {
 243         int ret = -1;
 244         struct tm6000_dvb *dvb = dev->dvb;
 245
 246         mutex_init(&dvb->mutex);
 247
 248         dvb->streams = 0;
 249
 250         /* attach the frontend */
 251         ret = tm6000_dvb_attach_frontend(dev);
 252         if(ret < 0) {
 253                 printk(KERN_ERR "tm6000: couldn't attach the frontend!\n");
 254                 goto err;
 255         }
 256
 257         ret = dvb_register_adapter(&dvb->adapter, "Trident TVMaster 6000 DVB-T",
 258                                                           THIS_MODULE, &dev->udev->dev, adapter_nr);
 259         dvb->adapter.priv = dev;
 260
 261         if (dvb->frontend) {
 262                 switch (dev->tuner_type) {
 263                 case TUNER_XC2028: {
 264                         struct xc2028_config cfg = {
 265                                 .i2c_adap = &dev->i2c_adap,
 266                                 .i2c_addr = dev->tuner_addr,
 267                         };
 268
 269                         dvb->frontend->callback = tm6000_tuner_callback;
 270                         ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 271                         if (ret < 0) {
 272                                 printk(KERN_ERR
 273                                         "tm6000: couldn't register frontend\n");
 274                                 goto adapter_err;
 275                         }
 276
 277                         if (!dvb_attach(xc2028_attach, dvb->frontend, &cfg)) {
 278                                 printk(KERN_ERR "tm6000: couldn't register "
 279                                                 "frontend (xc3028)\n");
 280                                 ret = -EINVAL;
 281                                 goto frontend_err;
 282                         }
 283                         printk(KERN_INFO "tm6000: XC2028/3028 asked to be "
 284                                          "attached to frontend!\n");
 285                         break;
 286                         }
 287                 case TUNER_XC5000: {
 288                         struct xc5000_config cfg = {
 289                                 .i2c_address = dev->tuner_addr,
 290                         };
 291
 292                         dvb->frontend->callback = tm6000_xc5000_callback;
 293                         ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 294                         if (ret < 0) {
 295                                 printk(KERN_ERR
 296                                         "tm6000: couldn't register frontend\n");
 297                                 goto adapter_err;
 298                         }
 299
 300                         if (!dvb_attach(xc5000_attach, dvb->frontend, &dev->i2c_adap, &cfg)) {
 301                                 printk(KERN_ERR "tm6000: couldn't register "
 302                                                 "frontend (xc5000)\n");
 303                                 ret = -EINVAL;
 304                                 goto frontend_err;
 305                         }
 306                         printk(KERN_INFO "tm6000: XC5000 asked to be "
 307                                          "attached to frontend!\n");
 308                         break;
 309                         }
 310                 }
 311         } else {
 312                 printk(KERN_ERR "tm6000: no frontend found\n");
 313         }
 314
 315         dvb->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING
 316                                                             | DMX_MEMORY_BASED_FILTERING;
 317         dvb->demux.priv = dev;
 318         dvb->demux.filternum = 8;
 319         dvb->demux.feednum = 8;
 320         dvb->demux.start_feed = tm6000_start_feed;
 321         dvb->demux.stop_feed = tm6000_stop_feed;
 322         dvb->demux.write_to_decoder = NULL;
 323         ret = dvb_dmx_init(&dvb->demux);
 324         if(ret < 0) {
 325                 printk("tm6000: dvb_dmx_init failed (errno = %d)\n", ret);
 326                 goto frontend_err;
 327         }
 328
 329         dvb->dmxdev.filternum = dev->dvb->demux.filternum;
 330         dvb->dmxdev.demux = &dev->dvb->demux.dmx;
 331         dvb->dmxdev.capabilities = 0;
 332
 333         ret =  dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
 334         if(ret < 0) {
 335                 printk("tm6000: dvb_dmxdev_init failed (errno = %d)\n", ret);
 336                 goto dvb_dmx_err;
 337         }
 338
 339         return 0;
 340
 341 dvb_dmx_err:
 342         dvb_dmx_release(&dvb->demux);
 343 frontend_err:
 344         if(dvb->frontend) {
 345                 dvb_frontend_detach(dvb->frontend);
 346                 dvb_unregister_frontend(dvb->frontend);
 347         }
 348 adapter_err:
 349         dvb_unregister_adapter(&dvb->adapter);
 350 err:
 351         return ret;
 352 }
 353
 354 void tm6000_dvb_unregister(struct tm6000_core *dev)
 355 {
 356         struct tm6000_dvb *dvb = dev->dvb;
 357
 358         if(dvb->bulk_urb != NULL) {
 359                 struct urb *bulk_urb = dvb->bulk_urb;
 360
 361                 kfree(bulk_urb->transfer_buffer);
 362                 bulk_urb->transfer_buffer = NULL;
 363                 usb_unlink_urb(bulk_urb);
 364                 usb_free_urb(bulk_urb);
 365         }
 366
 367 /*      mutex_lock(&tm6000_driver.open_close_mutex); */
 368         if(dvb->frontend) {
 369                 dvb_frontend_detach(dvb->frontend);
 370                 dvb_unregister_frontend(dvb->frontend);
 371         }
 372
 373         dvb_dmxdev_release(&dvb->dmxdev);
 374         dvb_dmx_release(&dvb->demux);
 375         dvb_unregister_adapter(&dvb->adapter);
 376         mutex_destroy(&dvb->mutex);
 377 /*      mutex_unlock(&tm6000_driver.open_close_mutex); */
 378
 379 }