drivers/media/dvb/dvb-usb/dib0700_core.c

   1 /* Linux driver for devices based on the DiBcom DiB0700 USB bridge
   2  *
   3  *      This program is free software; you can redistribute it and/or modify it
   4  *      under the terms of the GNU General Public License as published by the Free
   5  *      Software Foundation, version 2.
   6  *
   7  *  Copyright (C) 2005-6 DiBcom, SA
   8  */
   9 #include "dib0700.h"
  10
  11 /* debug */
  12 int dvb_usb_dib0700_debug;
  13 module_param_named(debug,dvb_usb_dib0700_debug, int, 0644);
  14 MODULE_PARM_DESC(debug, "set debugging level (1=info,2=fw,4=fwdata,8=data (or-able))." DVB_USB_DEBUG_STATUS);
  15
  16 static int nb_packet_buffer_size = 21;
  17 module_param(nb_packet_buffer_size, int, 0644);
  18 MODULE_PARM_DESC(nb_packet_buffer_size,
  19         "Set the dib0700 driver data buffer size. This parameter "
  20         "corresponds to the number of TS packets. The actual size of "
  21         "the data buffer corresponds to this parameter "
  22         "multiplied by 188 (default: 21)");
  23
  24 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  25
  26
  27 int dib0700_get_version(struct dvb_usb_device *d, u32 *hwversion,
  28                         u32 *romversion, u32 *ramversion, u32 *fwtype)
  29 {
  30         struct dib0700_state *st = d->priv;
  31         int ret;
  32
  33         ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0),
  34                                   REQUEST_GET_VERSION,
  35                                   USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
  36                                   st->buf, 16, USB_CTRL_GET_TIMEOUT);
  37         if (hwversion != NULL)
  38                 *hwversion  = (st->buf[0] << 24)  | (st->buf[1] << 16)  |
  39                         (st->buf[2] << 8)  | st->buf[3];
  40         if (romversion != NULL)
  41                 *romversion = (st->buf[4] << 24)  | (st->buf[5] << 16)  |
  42                         (st->buf[6] << 8)  | st->buf[7];
  43         if (ramversion != NULL)
  44                 *ramversion = (st->buf[8] << 24)  | (st->buf[9] << 16)  |
  45                         (st->buf[10] << 8) | st->buf[11];
  46         if (fwtype != NULL)
  47                 *fwtype     = (st->buf[12] << 24) | (st->buf[13] << 16) |
  48                         (st->buf[14] << 8) | st->buf[15];
  49         return ret;
  50 }
  51
  52 /* expecting rx buffer: request data[0] data[1] ... data[2] */
  53 static int dib0700_ctrl_wr(struct dvb_usb_device *d, u8 *tx, u8 txlen)
  54 {
  55         int status;
  56
  57         deb_data(">>> ");
  58         debug_dump(tx, txlen, deb_data);
  59
  60         status = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev,0),
  61                 tx[0], USB_TYPE_VENDOR | USB_DIR_OUT, 0, 0, tx, txlen,
  62                 USB_CTRL_GET_TIMEOUT);
  63
  64         if (status != txlen)
  65                 deb_data("ep 0 write error (status = %d, len: %d)\n",status,txlen);
  66
  67         return status < 0 ? status : 0;
  68 }
  69
  70 /* expecting tx buffer: request data[0] ... data[n] (n <= 4) */
  71 int dib0700_ctrl_rd(struct dvb_usb_device *d, u8 *tx, u8 txlen, u8 *rx, u8 rxlen)
  72 {
  73         u16 index, value;
  74         int status;
  75
  76         if (txlen < 2) {
  77                 err("tx buffer length is smaller than 2. Makes no sense.");
  78                 return -EINVAL;
  79         }
  80         if (txlen > 4) {
  81                 err("tx buffer length is larger than 4. Not supported.");
  82                 return -EINVAL;
  83         }
  84
  85         deb_data(">>> ");
  86         debug_dump(tx,txlen,deb_data);
  87
  88         value = ((txlen - 2) << 8) | tx[1];
  89         index = 0;
  90         if (txlen > 2)
  91                 index |= (tx[2] << 8);
  92         if (txlen > 3)
  93                 index |= tx[3];
  94
  95         status = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev,0), tx[0],
  96                         USB_TYPE_VENDOR | USB_DIR_IN, value, index, rx, rxlen,
  97                         USB_CTRL_GET_TIMEOUT);
  98
  99         if (status < 0)
 100                 deb_info("ep 0 read error (status = %d)\n",status);
 101
 102         deb_data("<<< ");
 103         debug_dump(rx, rxlen, deb_data);
 104
 105         return status; /* length in case of success */
 106 }
 107
 108 int dib0700_set_gpio(struct dvb_usb_device *d, enum dib07x0_gpios gpio, u8 gpio_dir, u8 gpio_val)
 109 {
 110         struct dib0700_state *st = d->priv;
 111         s16 ret;
 112
 113         st->buf[0] = REQUEST_SET_GPIO;
 114         st->buf[1] = gpio;
 115         st->buf[2] = ((gpio_dir & 0x01) << 7) | ((gpio_val & 0x01) << 6);
 116
 117         ret = dib0700_ctrl_wr(d, st->buf, 3);
 118
 119         return ret;
 120 }
 121
 122 static int dib0700_set_usb_xfer_len(struct dvb_usb_device *d, u16 nb_ts_packets)
 123 {
 124         struct dib0700_state *st = d->priv;
 125         int ret;
 126
 127         if (st->fw_version >= 0x10201) {
 128                 st->buf[0] = REQUEST_SET_USB_XFER_LEN;
 129                 st->buf[1] = (nb_ts_packets >> 8) & 0xff;
 130                 st->buf[2] = nb_ts_packets & 0xff;
 131
 132                 deb_info("set the USB xfer len to %i Ts packet\n", nb_ts_packets);
 133
 134                 ret = dib0700_ctrl_wr(d, st->buf, 3);
 135         } else {
 136                 deb_info("this firmware does not allow to change the USB xfer len\n");
 137                 ret = -EIO;
 138         }
 139
 140         return ret;
 141 }
 142
 143 /*
 144  * I2C master xfer function (supported in 1.20 firmware)
 145  */
 146 static int dib0700_i2c_xfer_new(struct i2c_adapter *adap, struct i2c_msg *msg,
 147                                 int num)
 148 {
 149         /* The new i2c firmware messages are more reliable and in particular
 150            properly support i2c read calls not preceded by a write */
 151
 152         struct dvb_usb_device *d = i2c_get_adapdata(adap);
 153         struct dib0700_state *st = d->priv;
 154         uint8_t bus_mode = 1;  /* 0=eeprom bus, 1=frontend bus */
 155         uint8_t gen_mode = 0; /* 0=master i2c, 1=gpio i2c */
 156         uint8_t en_start = 0;
 157         uint8_t en_stop = 0;
 158         int result, i;
 159
 160         /* Ensure nobody else hits the i2c bus while we're sending our
 161            sequence of messages, (such as the remote control thread) */
 162         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
 163                 return -EAGAIN;
 164
 165         for (i = 0; i < num; i++) {
 166                 if (i == 0) {
 167                         /* First message in the transaction */
 168                         en_start = 1;
 169                 } else if (!(msg[i].flags & I2C_M_NOSTART)) {
 170                         /* Device supports repeated-start */
 171                         en_start = 1;
 172                 } else {
 173                         /* Not the first packet and device doesn't support
 174                            repeated start */
 175                         en_start = 0;
 176                 }
 177                 if (i == (num - 1)) {
 178                         /* Last message in the transaction */
 179                         en_stop = 1;
 180                 }
 181
 182                 if (msg[i].flags & I2C_M_RD) {
 183                         /* Read request */
 184                         u16 index, value;
 185                         uint8_t i2c_dest;
 186
 187                         i2c_dest = (msg[i].addr << 1);
 188                         value = ((en_start << 7) | (en_stop << 6) |
 189                                  (msg[i].len & 0x3F)) << 8 | i2c_dest;
 190                         /* I2C ctrl + FE bus; */
 191                         index = ((gen_mode << 6) & 0xC0) |
 192                                 ((bus_mode << 4) & 0x30);
 193
 194                         result = usb_control_msg(d->udev,
 195                                                  usb_rcvctrlpipe(d->udev, 0),
 196                                                  REQUEST_NEW_I2C_READ,
 197                                                  USB_TYPE_VENDOR | USB_DIR_IN,
 198                                                  value, index, msg[i].buf,
 199                                                  msg[i].len,
 200                                                  USB_CTRL_GET_TIMEOUT);
 201                         if (result < 0) {
 202                                 deb_info("i2c read error (status = %d)\n", result);
 203                                 break;
 204                         }
 205
 206                         deb_data("<<< ");
 207                         debug_dump(msg[i].buf, msg[i].len, deb_data);
 208
 209                 } else {
 210                         /* Write request */
 211                         st->buf[0] = REQUEST_NEW_I2C_WRITE;
 212                         st->buf[1] = msg[i].addr << 1;
 213                         st->buf[2] = (en_start << 7) | (en_stop << 6) |
 214                                 (msg[i].len & 0x3F);
 215                         /* I2C ctrl + FE bus; */
 216                         st->buf[3] = ((gen_mode << 6) & 0xC0) |
 217                                  ((bus_mode << 4) & 0x30);
 218                         /* The Actual i2c payload */
 219                         memcpy(&st->buf[4], msg[i].buf, msg[i].len);
 220
 221                         deb_data(">>> ");
 222                         debug_dump(st->buf, msg[i].len + 4, deb_data);
 223
 224                         result = usb_control_msg(d->udev,
 225                                                  usb_sndctrlpipe(d->udev, 0),
 226                                                  REQUEST_NEW_I2C_WRITE,
 227                                                  USB_TYPE_VENDOR | USB_DIR_OUT,
 228                                                  0, 0, st->buf, msg[i].len + 4,
 229                                                  USB_CTRL_GET_TIMEOUT);
 230                         if (result < 0) {
 231                                 deb_info("i2c write error (status = %d)\n", result);
 232                                 break;
 233                         }
 234                 }
 235         }
 236         mutex_unlock(&d->i2c_mutex);
 237         return i;
 238 }
 239
 240 /*
 241  * I2C master xfer function (pre-1.20 firmware)
 242  */
 243 static int dib0700_i2c_xfer_legacy(struct i2c_adapter *adap,
 244                                    struct i2c_msg *msg, int num)
 245 {
 246         struct dvb_usb_device *d = i2c_get_adapdata(adap);
 247         struct dib0700_state *st = d->priv;
 248         int i,len;
 249
 250         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
 251                 return -EAGAIN;
 252
 253         for (i = 0; i < num; i++) {
 254                 /* fill in the address */
 255                 st->buf[1] = msg[i].addr << 1;
 256                 /* fill the buffer */
 257                 memcpy(&st->buf[2], msg[i].buf, msg[i].len);
 258
 259                 /* write/read request */
 260                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
 261                         st->buf[0] = REQUEST_I2C_READ;
 262                         st->buf[1] |= 1;
 263
 264                         /* special thing in the current firmware: when length is zero the read-failed */
 265                         len = dib0700_ctrl_rd(d, st->buf, msg[i].len + 2,
 266                                         msg[i+1].buf, msg[i+1].len);
 267                         if (len <= 0) {
 268                                 deb_info("I2C read failed on address 0x%02x\n",
 269                                                 msg[i].addr);
 270                                 break;
 271                         }
 272
 273                         msg[i+1].len = len;
 274
 275                         i++;
 276                 } else {
 277                         st->buf[0] = REQUEST_I2C_WRITE;
 278                         if (dib0700_ctrl_wr(d, st->buf, msg[i].len + 2) < 0)
 279                                 break;
 280                 }
 281         }
 282         mutex_unlock(&d->i2c_mutex);
 283
 284         return i;
 285 }
 286
 287 static int dib0700_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msg,
 288                             int num)
 289 {
 290         struct dvb_usb_device *d = i2c_get_adapdata(adap);
 291         struct dib0700_state *st = d->priv;
 292
 293         if (st->fw_use_new_i2c_api == 1) {
 294                 /* User running at least fw 1.20 */
 295                 return dib0700_i2c_xfer_new(adap, msg, num);
 296         } else {
 297                 /* Use legacy calls */
 298                 return dib0700_i2c_xfer_legacy(adap, msg, num);
 299         }
 300 }
 301
 302 static u32 dib0700_i2c_func(struct i2c_adapter *adapter)
 303 {
 304         return I2C_FUNC_I2C;
 305 }
 306
 307 struct i2c_algorithm dib0700_i2c_algo = {
 308         .master_xfer   = dib0700_i2c_xfer,
 309         .functionality = dib0700_i2c_func,
 310 };
 311
 312 int dib0700_identify_state(struct usb_device *udev, struct dvb_usb_device_properties *props,
 313                         struct dvb_usb_device_description **desc, int *cold)
 314 {
 315         s16 ret;
 316         u8 *b;
 317
 318         b = kmalloc(16, GFP_KERNEL);
 319         if (!b)
 320                 return  -ENOMEM;
 321
 322
 323         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 324                 REQUEST_GET_VERSION, USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, b, 16, USB_CTRL_GET_TIMEOUT);
 325
 326         deb_info("FW GET_VERSION length: %d\n",ret);
 327
 328         *cold = ret <= 0;
 329         deb_info("cold: %d\n", *cold);
 330
 331         kfree(b);
 332         return 0;
 333 }
 334
 335 static int dib0700_set_clock(struct dvb_usb_device *d, u8 en_pll,
 336         u8 pll_src, u8 pll_range, u8 clock_gpio3, u16 pll_prediv,
 337         u16 pll_loopdiv, u16 free_div, u16 dsuScaler)
 338 {
 339         struct dib0700_state *st = d->priv;
 340         s16 ret;
 341
 342         st->buf[0] = REQUEST_SET_CLOCK;
 343         st->buf[1] = (en_pll << 7) | (pll_src << 6) |
 344                 (pll_range << 5) | (clock_gpio3 << 4);
 345         st->buf[2] = (pll_prediv >> 8)  & 0xff; /* MSB */
 346         st->buf[3] =  pll_prediv        & 0xff; /* LSB */
 347         st->buf[4] = (pll_loopdiv >> 8) & 0xff; /* MSB */
 348         st->buf[5] =  pll_loopdiv       & 0xff; /* LSB */
 349         st->buf[6] = (free_div >> 8)    & 0xff; /* MSB */
 350         st->buf[7] =  free_div          & 0xff; /* LSB */
 351         st->buf[8] = (dsuScaler >> 8)   & 0xff; /* MSB */
 352         st->buf[9] =  dsuScaler         & 0xff; /* LSB */
 353
 354         ret = dib0700_ctrl_wr(d, st->buf, 10);
 355
 356         return ret;
 357 }
 358
 359 int dib0700_set_i2c_speed(struct dvb_usb_device *d, u16 scl_kHz)
 360 {
 361         struct dib0700_state *st = d->priv;
 362         u16 divider;
 363
 364         if (scl_kHz == 0)
 365                 return -EINVAL;
 366
 367         st->buf[0] = REQUEST_SET_I2C_PARAM;
 368         divider = (u16) (30000 / scl_kHz);
 369         st->buf[1] = 0;
 370         st->buf[2] = (u8) (divider >> 8);
 371         st->buf[3] = (u8) (divider & 0xff);
 372         divider = (u16) (72000 / scl_kHz);
 373         st->buf[4] = (u8) (divider >> 8);
 374         st->buf[5] = (u8) (divider & 0xff);
 375         divider = (u16) (72000 / scl_kHz); /* clock: 72MHz */
 376         st->buf[6] = (u8) (divider >> 8);
 377         st->buf[7] = (u8) (divider & 0xff);
 378
 379         deb_info("setting I2C speed: %04x %04x %04x (%d kHz).",
 380                 (st->buf[2] << 8) | (st->buf[3]), (st->buf[4] << 8) |
 381                 st->buf[5], (st->buf[6] << 8) | st->buf[7], scl_kHz);
 382         return dib0700_ctrl_wr(d, st->buf, 8);
 383 }
 384
 385
 386 int dib0700_ctrl_clock(struct dvb_usb_device *d, u32 clk_MHz, u8 clock_out_gp3)
 387 {
 388         switch (clk_MHz) {
 389                 case 72: dib0700_set_clock(d, 1, 0, 1, clock_out_gp3, 2, 24, 0, 0x4c); break;
 390                 default: return -EINVAL;
 391         }
 392         return 0;
 393 }
 394
 395 static int dib0700_jumpram(struct usb_device *udev, u32 address)
 396 {
 397         int ret = 0, actlen;
 398         u8 *buf;
 399
 400         buf = kmalloc(8, GFP_KERNEL);
 401         if (!buf)
 402                 return -ENOMEM;
 403         buf[0] = REQUEST_JUMPRAM;
 404         buf[1] = 0;
 405         buf[2] = 0;
 406         buf[3] = 0;
 407         buf[4] = (address >> 24) & 0xff;
 408         buf[5] = (address >> 16) & 0xff;
 409         buf[6] = (address >> 8)  & 0xff;
 410         buf[7] =  address        & 0xff;
 411
 412         if ((ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, 0x01),buf,8,&actlen,1000)) < 0) {
 413                 deb_fw("jumpram to 0x%x failed\n",address);
 414                 goto out;
 415         }
 416         if (actlen != 8) {
 417                 deb_fw("jumpram to 0x%x failed\n",address);
 418                 ret = -EIO;
 419                 goto out;
 420         }
 421 out:
 422         kfree(buf);
 423         return ret;
 424 }
 425
 426 int dib0700_download_firmware(struct usb_device *udev, const struct firmware *fw)
 427 {
 428         struct hexline hx;
 429         int pos = 0, ret, act_len, i, adap_num;
 430         u8 *buf;
 431         u32 fw_version;
 432
 433         buf = kmalloc(260, GFP_KERNEL);
 434         if (!buf)
 435                 return -ENOMEM;
 436
 437         while ((ret = dvb_usb_get_hexline(fw, &hx, &pos)) > 0) {
 438                 deb_fwdata("writing to address 0x%08x (buffer: 0x%02x %02x)\n",
 439                                 hx.addr, hx.len, hx.chk);
 440
 441                 buf[0] = hx.len;
 442                 buf[1] = (hx.addr >> 8) & 0xff;
 443                 buf[2] =  hx.addr       & 0xff;
 444                 buf[3] = hx.type;
 445                 memcpy(&buf[4],hx.data,hx.len);
 446                 buf[4+hx.len] = hx.chk;
 447
 448                 ret = usb_bulk_msg(udev,
 449                         usb_sndbulkpipe(udev, 0x01),
 450                         buf,
 451                         hx.len + 5,
 452                         &act_len,
 453                         1000);
 454
 455                 if (ret < 0) {
 456                         err("firmware download failed at %d with %d",pos,ret);
 457                         goto out;
 458                 }
 459         }
 460
 461         if (ret == 0) {
 462                 /* start the firmware */
 463                 if ((ret = dib0700_jumpram(udev, 0x70000000)) == 0) {
 464                         info("firmware started successfully.");
 465                         msleep(500);
 466                 }
 467         } else
 468                 ret = -EIO;
 469
 470         /* the number of ts packet has to be at least 1 */
 471         if (nb_packet_buffer_size < 1)
 472                 nb_packet_buffer_size = 1;
 473
 474         /* get the fimware version */
 475         usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 476                                   REQUEST_GET_VERSION,
 477                                   USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
 478                                   buf, 16, USB_CTRL_GET_TIMEOUT);
 479         fw_version = (buf[8] << 24) | (buf[9] << 16) | (buf[10] << 8) | buf[11];
 480
 481         /* set the buffer size - DVB-USB is allocating URB buffers
 482          * only after the firwmare download was successful */
 483         for (i = 0; i < dib0700_device_count; i++) {
 484                 for (adap_num = 0; adap_num < dib0700_devices[i].num_adapters;
 485                                 adap_num++) {
 486                         if (fw_version >= 0x10201) {
 487                                 dib0700_devices[i].adapter[adap_num].stream.u.bulk.buffersize = 188*nb_packet_buffer_size;
 488                         } else {
 489                                 /* for fw version older than 1.20.1,
 490                                  * the buffersize has to be n times 512 */
 491                                 dib0700_devices[i].adapter[adap_num].stream.u.bulk.buffersize = ((188*nb_packet_buffer_size+188/2)/512)*512;
 492                                 if (dib0700_devices[i].adapter[adap_num].stream.u.bulk.buffersize < 512)
 493                                         dib0700_devices[i].adapter[adap_num].stream.u.bulk.buffersize = 512;
 494                         }
 495                 }
 496         }
 497 out:
 498         kfree(buf);
 499         return ret;
 500 }
 501
 502 int dib0700_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
 503 {
 504         struct dib0700_state *st = adap->dev->priv;
 505         int ret;
 506
 507         if ((onoff != 0) && (st->fw_version >= 0x10201)) {
 508                 /* for firmware later than 1.20.1,
 509                  * the USB xfer length can be set  */
 510                 ret = dib0700_set_usb_xfer_len(adap->dev,
 511                         st->nb_packet_buffer_size);
 512                 if (ret < 0) {
 513                         deb_info("can not set the USB xfer len\n");
 514                         return ret;
 515                 }
 516         }
 517
 518         st->buf[0] = REQUEST_ENABLE_VIDEO;
 519         /* this bit gives a kind of command,
 520          * rather than enabling something or not */
 521         st->buf[1] = (onoff << 4) | 0x00;
 522
 523         if (st->disable_streaming_master_mode == 1)
 524                 st->buf[2] = 0x00;
 525         else
 526                 st->buf[2] = 0x01 << 4; /* Master mode */
 527
 528         st->buf[3] = 0x00;
 529
 530         deb_info("modifying (%d) streaming state for %d\n", onoff, adap->id);
 531
 532         st->channel_state &= ~0x3;
 533         if ((adap->stream.props.endpoint != 2)
 534                         && (adap->stream.props.endpoint != 3)) {
 535                 deb_info("the endpoint number (%i) is not correct, use the adapter id instead", adap->stream.props.endpoint);
 536                 if (onoff)
 537                         st->channel_state |=    1 << (adap->id);
 538                 else
 539                         st->channel_state |=    1 << ~(adap->id);
 540         } else {
 541                 if (onoff)
 542                         st->channel_state |=    1 << (adap->stream.props.endpoint-2);
 543                 else
 544                         st->channel_state |=    1 << (3-adap->stream.props.endpoint);
 545         }
 546
 547         st->buf[2] |= st->channel_state;
 548
 549         deb_info("data for streaming: %x %x\n", st->buf[1], st->buf[2]);
 550
 551         return dib0700_ctrl_wr(adap->dev, st->buf, 4);
 552 }
 553
 554 int dib0700_change_protocol(struct rc_dev *rc, u64 rc_type)
 555 {
 556         struct dvb_usb_device *d = rc->priv;
 557         struct dib0700_state *st = d->priv;
 558         int new_proto, ret;
 559
 560         st->buf[0] = REQUEST_SET_RC;
 561         st->buf[1] = 0;
 562         st->buf[2] = 0;
 563
 564         /* Set the IR mode */
 565         if (rc_type == RC_TYPE_RC5)
 566                 new_proto = 1;
 567         else if (rc_type == RC_TYPE_NEC)
 568                 new_proto = 0;
 569         else if (rc_type == RC_TYPE_RC6) {
 570                 if (st->fw_version < 0x10200)
 571                         return -EINVAL;
 572
 573                 new_proto = 2;
 574         } else
 575                 return -EINVAL;
 576
 577         st->buf[1] = new_proto;
 578
 579         ret = dib0700_ctrl_wr(d, st->buf, 3);
 580         if (ret < 0) {
 581                 err("ir protocol setup failed");
 582                 return ret;
 583         }
 584
 585         d->props.rc.core.protocol = rc_type;
 586
 587         return ret;
 588 }
 589
 590 /* Number of keypresses to ignore before start repeating */
 591 #define RC_REPEAT_DELAY_V1_20 10
 592
 593 /* This is the structure of the RC response packet starting in firmware 1.20 */
 594 struct dib0700_rc_response {
 595         u8 report_id;
 596         u8 data_state;
 597         union {
 598                 u16 system16;
 599                 struct {
 600                         u8 not_system;
 601                         u8 system;
 602                 };
 603         };
 604         u8 data;
 605         u8 not_data;
 606 };
 607 #define RC_MSG_SIZE_V1_20 6
 608
 609 static void dib0700_rc_urb_completion(struct urb *purb)
 610 {
 611         struct dvb_usb_device *d = purb->context;
 612         struct dib0700_rc_response *poll_reply;
 613         u32 uninitialized_var(keycode);
 614         u8 toggle;
 615
 616         deb_info("%s()\n", __func__);
 617         if (d == NULL)
 618                 return;
 619
 620         if (d->rc_dev == NULL) {
 621                 /* This will occur if disable_rc_polling=1 */
 622                 usb_free_urb(purb);
 623                 return;
 624         }
 625
 626         poll_reply = purb->transfer_buffer;
 627
 628         if (purb->status < 0) {
 629                 deb_info("discontinuing polling\n");
 630                 usb_free_urb(purb);
 631                 return;
 632         }
 633
 634         if (purb->actual_length != RC_MSG_SIZE_V1_20) {
 635                 deb_info("malformed rc msg size=%d\n", purb->actual_length);
 636                 goto resubmit;
 637         }
 638
 639         deb_data("IR ID = %02X state = %02X System = %02X %02X Cmd = %02X %02X (len %d)\n",
 640                  poll_reply->report_id, poll_reply->data_state,
 641                  poll_reply->system, poll_reply->not_system,
 642                  poll_reply->data, poll_reply->not_data,
 643                  purb->actual_length);
 644
 645         switch (d->props.rc.core.protocol) {
 646         case RC_TYPE_NEC:
 647                 toggle = 0;
 648
 649                 /* NEC protocol sends repeat code as 0 0 0 FF */
 650                 if ((poll_reply->system == 0x00) && (poll_reply->data == 0x00)
 651                     && (poll_reply->not_data == 0xff)) {
 652                         poll_reply->data_state = 2;
 653                         break;
 654                 }
 655
 656                 if ((poll_reply->system ^ poll_reply->not_system) != 0xff) {
 657                         deb_data("NEC extended protocol\n");
 658                         /* NEC extended code - 24 bits */
 659                         keycode = be16_to_cpu(poll_reply->system16) << 8 | poll_reply->data;
 660                 } else {
 661                         deb_data("NEC normal protocol\n");
 662                         /* normal NEC code - 16 bits */
 663                         keycode = poll_reply->system << 8 | poll_reply->data;
 664                 }
 665
 666                 break;
 667         default:
 668                 deb_data("RC5 protocol\n");
 669                 /* RC5 Protocol */
 670                 toggle = poll_reply->report_id;
 671                 keycode = poll_reply->system << 8 | poll_reply->data;
 672
 673                 break;
 674         }
 675
 676         if ((poll_reply->data + poll_reply->not_data) != 0xff) {
 677                 /* Key failed integrity check */
 678                 err("key failed integrity check: %04x %02x %02x",
 679                     poll_reply->system,
 680                     poll_reply->data, poll_reply->not_data);
 681                 goto resubmit;
 682         }
 683
 684         rc_keydown(d->rc_dev, keycode, toggle);
 685
 686 resubmit:
 687         /* Clean the buffer before we requeue */
 688         memset(purb->transfer_buffer, 0, RC_MSG_SIZE_V1_20);
 689
 690         /* Requeue URB */
 691         usb_submit_urb(purb, GFP_ATOMIC);
 692 }
 693
 694 int dib0700_rc_setup(struct dvb_usb_device *d)
 695 {
 696         struct dib0700_state *st = d->priv;
 697         struct urb *purb;
 698         int ret;
 699
 700         /* Poll-based. Don't initialize bulk mode */
 701         if (st->fw_version < 0x10200)
 702                 return 0;
 703
 704         /* Starting in firmware 1.20, the RC info is provided on a bulk pipe */
 705         purb = usb_alloc_urb(0, GFP_KERNEL);
 706         if (purb == NULL) {
 707                 err("rc usb alloc urb failed\n");
 708                 return -ENOMEM;
 709         }
 710
 711         purb->transfer_buffer = kzalloc(RC_MSG_SIZE_V1_20, GFP_KERNEL);
 712         if (purb->transfer_buffer == NULL) {
 713                 err("rc kzalloc failed\n");
 714                 usb_free_urb(purb);
 715                 return -ENOMEM;
 716         }
 717
 718         purb->status = -EINPROGRESS;
 719         usb_fill_bulk_urb(purb, d->udev, usb_rcvbulkpipe(d->udev, 1),
 720                           purb->transfer_buffer, RC_MSG_SIZE_V1_20,
 721                           dib0700_rc_urb_completion, d);
 722
 723         ret = usb_submit_urb(purb, GFP_ATOMIC);
 724         if (ret)
 725                 err("rc submit urb failed\n");
 726
 727         return ret;
 728 }
 729
 730 static int dib0700_probe(struct usb_interface *intf,
 731                 const struct usb_device_id *id)
 732 {
 733         int i;
 734         struct dvb_usb_device *dev;
 735
 736         for (i = 0; i < dib0700_device_count; i++)
 737                 if (dvb_usb_device_init(intf, &dib0700_devices[i], THIS_MODULE,
 738                     &dev, adapter_nr) == 0) {
 739                         struct dib0700_state *st = dev->priv;
 740                         u32 hwversion, romversion, fw_version, fwtype;
 741
 742                         dib0700_get_version(dev, &hwversion, &romversion,
 743                                 &fw_version, &fwtype);
 744
 745                         deb_info("Firmware version: %x, %d, 0x%x, %d\n",
 746                                 hwversion, romversion, fw_version, fwtype);
 747
 748                         st->fw_version = fw_version;
 749                         st->nb_packet_buffer_size = (u32)nb_packet_buffer_size;
 750
 751                         /* Disable polling mode on newer firmwares */
 752                         if (st->fw_version >= 0x10200)
 753                                 dev->props.rc.core.bulk_mode = true;
 754                         else
 755                                 dev->props.rc.core.bulk_mode = false;
 756
 757                         dib0700_rc_setup(dev);
 758
 759                         return 0;
 760                 }
 761
 762         return -ENODEV;
 763 }
 764
 765 static struct usb_driver dib0700_driver = {
 766         .name       = "dvb_usb_dib0700",
 767         .probe      = dib0700_probe,
 768         .disconnect = dvb_usb_device_exit,
 769         .id_table   = dib0700_usb_id_table,
 770 };
 771
 772 /* module stuff */
 773 static int __init dib0700_module_init(void)
 774 {
 775         int result;
 776         info("loaded with support for %d different device-types", dib0700_device_count);
 777         if ((result = usb_register(&dib0700_driver))) {
 778                 err("usb_register failed. Error number %d",result);
 779                 return result;
 780         }
 781
 782         return 0;
 783 }
 784
 785 static void __exit dib0700_module_exit(void)
 786 {
 787         /* deregister this driver from the USB subsystem */
 788         usb_deregister(&dib0700_driver);
 789 }
 790
 791 module_init (dib0700_module_init);
 792 module_exit (dib0700_module_exit);
 793
 794 MODULE_AUTHOR("Patrick Boettcher <pboettcher@dibcom.fr>");
 795 MODULE_DESCRIPTION("Driver for devices based on DiBcom DiB0700 - USB bridge");
 796 MODULE_VERSION("1.0");
 797 MODULE_LICENSE("GPL");