drivers/media/spi/cxd2880-spi.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * cxd2880-spi.c
   4  * Sony CXD2880 DVB-T2/T tuner + demodulator driver
   5  * SPI adapter
   6  *
   7  * Copyright (C) 2016, 2017, 2018 Sony Semiconductor Solutions Corporation
   8  */
   9
  10 #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
  11
  12 #include <linux/spi/spi.h>
  13 #include <linux/ktime.h>
  14
  15 #include <media/dvb_demux.h>
  16 #include <media/dmxdev.h>
  17 #include <media/dvb_frontend.h>
  18 #include "cxd2880.h"
  19
  20 #define CXD2880_MAX_FILTER_SIZE 32
  21 #define BURST_WRITE_MAX 128
  22 #define MAX_TRANS_PKT 300
  23
  24 struct cxd2880_ts_buf_info {
  25         u8 read_ready:1;
  26         u8 almost_full:1;
  27         u8 almost_empty:1;
  28         u8 overflow:1;
  29         u8 underflow:1;
  30         u16 pkt_num;
  31 };
  32
  33 struct cxd2880_pid_config {
  34         u8 is_enable;
  35         u16 pid;
  36 };
  37
  38 struct cxd2880_pid_filter_config {
  39         u8 is_negative;
  40         struct cxd2880_pid_config pid_config[CXD2880_MAX_FILTER_SIZE];
  41 };
  42
  43 struct cxd2880_dvb_spi {
  44         struct dvb_frontend dvb_fe;
  45         struct dvb_adapter adapter;
  46         struct dvb_demux demux;
  47         struct dmxdev dmxdev;
  48         struct dmx_frontend dmx_fe;
  49         struct task_struct *cxd2880_ts_read_thread;
  50         struct spi_device *spi;
  51         struct mutex spi_mutex; /* For SPI access exclusive control */
  52         int feed_count;
  53         int all_pid_feed_count;
  54         u8 *ts_buf;
  55         struct cxd2880_pid_filter_config filter_config;
  56 };
  57
  58 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  59
  60 static int cxd2880_write_spi(struct spi_device *spi, u8 *data, u32 size)
  61 {
  62         struct spi_message msg;
  63         struct spi_transfer tx = {};
  64
  65         if (!spi || !data) {
  66                 pr_err("invalid arg\n");
  67                 return -EINVAL;
  68         }
  69
  70         tx.tx_buf = data;
  71         tx.len = size;
  72
  73         spi_message_init(&msg);
  74         spi_message_add_tail(&tx, &msg);
  75
  76         return spi_sync(spi, &msg);
  77 }
  78
  79 static int cxd2880_write_reg(struct spi_device *spi,
  80                              u8 sub_address, const u8 *data, u32 size)
  81 {
  82         u8 send_data[BURST_WRITE_MAX + 4];
  83         const u8 *write_data_top = NULL;
  84         int ret = 0;
  85
  86         if (!spi || !data) {
  87                 pr_err("invalid arg\n");
  88                 return -EINVAL;
  89         }
  90         if (size > BURST_WRITE_MAX || size > U8_MAX) {
  91                 pr_err("data size > WRITE_MAX\n");
  92                 return -EINVAL;
  93         }
  94
  95         if (sub_address + size > 0x100) {
  96                 pr_err("out of range\n");
  97                 return -EINVAL;
  98         }
  99
 100         send_data[0] = 0x0e;
 101         write_data_top = data;
 102
 103         send_data[1] = sub_address;
 104         send_data[2] = (u8)size;
 105
 106         memcpy(&send_data[3], write_data_top, send_data[2]);
 107
 108         ret = cxd2880_write_spi(spi, send_data, send_data[2] + 3);
 109         if (ret)
 110                 pr_err("write spi failed %d\n", ret);
 111
 112         return ret;
 113 }
 114
 115 static int cxd2880_spi_read_ts(struct spi_device *spi,
 116                                u8 *read_data,
 117                                u32 packet_num)
 118 {
 119         int ret;
 120         u8 data[3];
 121         struct spi_message message;
 122         struct spi_transfer transfer[2] = {};
 123
 124         if (!spi || !read_data || !packet_num) {
 125                 pr_err("invalid arg\n");
 126                 return -EINVAL;
 127         }
 128         if (packet_num > 0xffff) {
 129                 pr_err("packet num > 0xffff\n");
 130                 return -EINVAL;
 131         }
 132
 133         data[0] = 0x10;
 134         data[1] = packet_num >> 8;
 135         data[2] = packet_num;
 136
 137         spi_message_init(&message);
 138
 139         transfer[0].len = 3;
 140         transfer[0].tx_buf = data;
 141         spi_message_add_tail(&transfer[0], &message);
 142         transfer[1].len = packet_num * 188;
 143         transfer[1].rx_buf = read_data;
 144         spi_message_add_tail(&transfer[1], &message);
 145
 146         ret = spi_sync(spi, &message);
 147         if (ret)
 148                 pr_err("spi_write_then_read failed\n");
 149
 150         return ret;
 151 }
 152
 153 static int cxd2880_spi_read_ts_buffer_info(struct spi_device *spi,
 154                                            struct cxd2880_ts_buf_info *info)
 155 {
 156         u8 send_data = 0x20;
 157         u8 recv_data[2];
 158         int ret;
 159
 160         if (!spi || !info) {
 161                 pr_err("invalid arg\n");
 162                 return -EINVAL;
 163         }
 164
 165         ret = spi_write_then_read(spi, &send_data, 1,
 166                                   recv_data, sizeof(recv_data));
 167         if (ret)
 168                 pr_err("spi_write_then_read failed\n");
 169
 170         info->read_ready = (recv_data[0] & 0x80) ? 1 : 0;
 171         info->almost_full = (recv_data[0] & 0x40) ? 1 : 0;
 172         info->almost_empty = (recv_data[0] & 0x20) ? 1 : 0;
 173         info->overflow = (recv_data[0] & 0x10) ? 1 : 0;
 174         info->underflow = (recv_data[0] & 0x08) ? 1 : 0;
 175         info->pkt_num = ((recv_data[0] & 0x07) << 8) | recv_data[1];
 176
 177         return ret;
 178 }
 179
 180 static int cxd2880_spi_clear_ts_buffer(struct spi_device *spi)
 181 {
 182         u8 data = 0x03;
 183         int ret;
 184
 185         ret = cxd2880_write_spi(spi, &data, 1);
 186
 187         if (ret)
 188                 pr_err("write spi failed\n");
 189
 190         return ret;
 191 }
 192
 193 static int cxd2880_set_pid_filter(struct spi_device *spi,
 194                                   struct cxd2880_pid_filter_config *cfg)
 195 {
 196         u8 data[65];
 197         int i;
 198         u16 pid = 0;
 199         int ret;
 200
 201         if (!spi) {
 202                 pr_err("invalid arg\n");
 203                 return -EINVAL;
 204         }
 205
 206         data[0] = 0x00;
 207         ret = cxd2880_write_reg(spi, 0x00, &data[0], 1);
 208         if (ret)
 209                 return ret;
 210         if (!cfg) {
 211                 data[0] = 0x02;
 212                 ret = cxd2880_write_reg(spi, 0x50, &data[0], 1);
 213         } else {
 214                 data[0] = cfg->is_negative ? 0x01 : 0x00;
 215
 216                 for (i = 0; i < CXD2880_MAX_FILTER_SIZE; i++) {
 217                         pid = cfg->pid_config[i].pid;
 218                         if (cfg->pid_config[i].is_enable) {
 219                                 data[1 + (i * 2)] = (pid >> 8) | 0x20;
 220                                 data[2 + (i * 2)] = pid & 0xff;
 221                         } else {
 222                                 data[1 + (i * 2)] = 0x00;
 223                                 data[2 + (i * 2)] = 0x00;
 224                         }
 225                 }
 226                 ret = cxd2880_write_reg(spi, 0x50, data, 65);
 227         }
 228
 229         return ret;
 230 }
 231
 232 static int cxd2880_update_pid_filter(struct cxd2880_dvb_spi *dvb_spi,
 233                                      struct cxd2880_pid_filter_config *cfg,
 234                                      bool is_all_pid_filter)
 235 {
 236         int ret;
 237
 238         if (!dvb_spi || !cfg) {
 239                 pr_err("invalid arg.\n");
 240                 return -EINVAL;
 241         }
 242
 243         mutex_lock(&dvb_spi->spi_mutex);
 244         if (is_all_pid_filter) {
 245                 struct cxd2880_pid_filter_config tmpcfg;
 246
 247                 memset(&tmpcfg, 0, sizeof(tmpcfg));
 248                 tmpcfg.is_negative = 1;
 249                 tmpcfg.pid_config[0].is_enable = 1;
 250                 tmpcfg.pid_config[0].pid = 0x1fff;
 251
 252                 ret = cxd2880_set_pid_filter(dvb_spi->spi, &tmpcfg);
 253         } else {
 254                 ret = cxd2880_set_pid_filter(dvb_spi->spi, cfg);
 255         }
 256         mutex_unlock(&dvb_spi->spi_mutex);
 257
 258         if (ret)
 259                 pr_err("set_pid_filter failed\n");
 260
 261         return ret;
 262 }
 263
 264 static int cxd2880_ts_read(void *arg)
 265 {
 266         struct cxd2880_dvb_spi *dvb_spi = NULL;
 267         struct cxd2880_ts_buf_info info;
 268         ktime_t start;
 269         u32 i;
 270         int ret;
 271
 272         dvb_spi = arg;
 273         if (!dvb_spi) {
 274                 pr_err("invalid arg\n");
 275                 return -EINVAL;
 276         }
 277
 278         ret = cxd2880_spi_clear_ts_buffer(dvb_spi->spi);
 279         if (ret) {
 280                 pr_err("set_clear_ts_buffer failed\n");
 281                 return ret;
 282         }
 283
 284         start = ktime_get();
 285         while (!kthread_should_stop()) {
 286                 ret = cxd2880_spi_read_ts_buffer_info(dvb_spi->spi,
 287                                                       &info);
 288                 if (ret) {
 289                         pr_err("spi_read_ts_buffer_info error\n");
 290                         return ret;
 291                 }
 292
 293                 if (info.pkt_num > MAX_TRANS_PKT) {
 294                         for (i = 0; i < info.pkt_num / MAX_TRANS_PKT; i++) {
 295                                 cxd2880_spi_read_ts(dvb_spi->spi,
 296                                                     dvb_spi->ts_buf,
 297                                                     MAX_TRANS_PKT);
 298                                 dvb_dmx_swfilter(&dvb_spi->demux,
 299                                                  dvb_spi->ts_buf,
 300                                                  MAX_TRANS_PKT * 188);
 301                         }
 302                         start = ktime_get();
 303                 } else if ((info.pkt_num > 0) &&
 304                            (ktime_to_ms(ktime_sub(ktime_get(), start)) >= 500)) {
 305                         cxd2880_spi_read_ts(dvb_spi->spi,
 306                                             dvb_spi->ts_buf,
 307                                             info.pkt_num);
 308                         dvb_dmx_swfilter(&dvb_spi->demux,
 309                                          dvb_spi->ts_buf,
 310                                          info.pkt_num * 188);
 311                         start = ktime_get();
 312                 } else {
 313                         usleep_range(10000, 11000);
 314                 }
 315         }
 316
 317         return 0;
 318 }
 319
 320 static int cxd2880_start_feed(struct dvb_demux_feed *feed)
 321 {
 322         int ret = 0;
 323         int i = 0;
 324         struct dvb_demux *demux = NULL;
 325         struct cxd2880_dvb_spi *dvb_spi = NULL;
 326
 327         if (!feed) {
 328                 pr_err("invalid arg\n");
 329                 return -EINVAL;
 330         }
 331
 332         demux = feed->demux;
 333         if (!demux) {
 334                 pr_err("feed->demux is NULL\n");
 335                 return -EINVAL;
 336         }
 337         dvb_spi = demux->priv;
 338
 339         if (dvb_spi->feed_count == CXD2880_MAX_FILTER_SIZE) {
 340                 pr_err("Exceeded maximum PID count (32).");
 341                 pr_err("Selected PID cannot be enabled.\n");
 342                 return -EINVAL;
 343         }
 344
 345         if (feed->pid == 0x2000) {
 346                 if (dvb_spi->all_pid_feed_count == 0) {
 347                         ret = cxd2880_update_pid_filter(dvb_spi,
 348                                                         &dvb_spi->filter_config,
 349                                                         true);
 350                         if (ret) {
 351                                 pr_err("update pid filter failed\n");
 352                                 return ret;
 353                         }
 354                 }
 355                 dvb_spi->all_pid_feed_count++;
 356
 357                 pr_debug("all PID feed (count = %d)\n",
 358                          dvb_spi->all_pid_feed_count);
 359         } else {
 360                 struct cxd2880_pid_filter_config cfgtmp;
 361
 362                 cfgtmp = dvb_spi->filter_config;
 363
 364                 for (i = 0; i < CXD2880_MAX_FILTER_SIZE; i++) {
 365                         if (cfgtmp.pid_config[i].is_enable == 0) {
 366                                 cfgtmp.pid_config[i].is_enable = 1;
 367                                 cfgtmp.pid_config[i].pid = feed->pid;
 368                                 pr_debug("store PID %d to #%d\n",
 369                                          feed->pid, i);
 370                                 break;
 371                         }
 372                 }
 373                 if (i == CXD2880_MAX_FILTER_SIZE) {
 374                         pr_err("PID filter is full.\n");
 375                         return -EINVAL;
 376                 }
 377                 if (!dvb_spi->all_pid_feed_count)
 378                         ret = cxd2880_update_pid_filter(dvb_spi,
 379                                                         &cfgtmp,
 380                                                         false);
 381                 if (ret)
 382                         return ret;
 383
 384                 dvb_spi->filter_config = cfgtmp;
 385         }
 386
 387         if (dvb_spi->feed_count == 0) {
 388                 dvb_spi->ts_buf =
 389                         kmalloc(MAX_TRANS_PKT * 188,
 390                                 GFP_KERNEL | GFP_DMA);
 391                 if (!dvb_spi->ts_buf) {
 392                         pr_err("ts buffer allocate failed\n");
 393                         memset(&dvb_spi->filter_config, 0,
 394                                sizeof(dvb_spi->filter_config));
 395                         dvb_spi->all_pid_feed_count = 0;
 396                         return -ENOMEM;
 397                 }
 398                 dvb_spi->cxd2880_ts_read_thread = kthread_run(cxd2880_ts_read,
 399                                                               dvb_spi,
 400                                                               "cxd2880_ts_read");
 401                 if (IS_ERR(dvb_spi->cxd2880_ts_read_thread)) {
 402                         pr_err("kthread_run failed/\n");
 403                         kfree(dvb_spi->ts_buf);
 404                         dvb_spi->ts_buf = NULL;
 405                         memset(&dvb_spi->filter_config, 0,
 406                                sizeof(dvb_spi->filter_config));
 407                         dvb_spi->all_pid_feed_count = 0;
 408                         return PTR_ERR(dvb_spi->cxd2880_ts_read_thread);
 409                 }
 410         }
 411
 412         dvb_spi->feed_count++;
 413
 414         pr_debug("start feed (count %d)\n", dvb_spi->feed_count);
 415         return 0;
 416 }
 417
 418 static int cxd2880_stop_feed(struct dvb_demux_feed *feed)
 419 {
 420         int i = 0;
 421         int ret;
 422         struct dvb_demux *demux = NULL;
 423         struct cxd2880_dvb_spi *dvb_spi = NULL;
 424
 425         if (!feed) {
 426                 pr_err("invalid arg\n");
 427                 return -EINVAL;
 428         }
 429
 430         demux = feed->demux;
 431         if (!demux) {
 432                 pr_err("feed->demux is NULL\n");
 433                 return -EINVAL;
 434         }
 435         dvb_spi = demux->priv;
 436
 437         if (!dvb_spi->feed_count) {
 438                 pr_err("no feed is started\n");
 439                 return -EINVAL;
 440         }
 441
 442         if (feed->pid == 0x2000) {
 443                 /*
 444                  * Special PID case.
 445                  * Number of 0x2000 feed request was stored
 446                  * in dvb_spi->all_pid_feed_count.
 447                  */
 448                 if (dvb_spi->all_pid_feed_count <= 0) {
 449                         pr_err("PID %d not found.\n", feed->pid);
 450                         return -EINVAL;
 451                 }
 452                 dvb_spi->all_pid_feed_count--;
 453         } else {
 454                 struct cxd2880_pid_filter_config cfgtmp;
 455
 456                 cfgtmp = dvb_spi->filter_config;
 457
 458                 for (i = 0; i < CXD2880_MAX_FILTER_SIZE; i++) {
 459                         if (feed->pid == cfgtmp.pid_config[i].pid &&
 460                             cfgtmp.pid_config[i].is_enable != 0) {
 461                                 cfgtmp.pid_config[i].is_enable = 0;
 462                                 cfgtmp.pid_config[i].pid = 0;
 463                                 pr_debug("removed PID %d from #%d\n",
 464                                          feed->pid, i);
 465                                 break;
 466                         }
 467                 }
 468                 dvb_spi->filter_config = cfgtmp;
 469
 470                 if (i == CXD2880_MAX_FILTER_SIZE) {
 471                         pr_err("PID %d not found\n", feed->pid);
 472                         return -EINVAL;
 473                 }
 474         }
 475
 476         ret = cxd2880_update_pid_filter(dvb_spi,
 477                                         &dvb_spi->filter_config,
 478                                         dvb_spi->all_pid_feed_count > 0);
 479         dvb_spi->feed_count--;
 480
 481         if (dvb_spi->feed_count == 0) {
 482                 int ret_stop = 0;
 483
 484                 ret_stop = kthread_stop(dvb_spi->cxd2880_ts_read_thread);
 485                 if (ret_stop) {
 486                         pr_err("'kthread_stop failed. (%d)\n", ret_stop);
 487                         ret = ret_stop;
 488                 }
 489                 kfree(dvb_spi->ts_buf);
 490                 dvb_spi->ts_buf = NULL;
 491         }
 492
 493         pr_debug("stop feed ok.(count %d)\n", dvb_spi->feed_count);
 494
 495         return ret;
 496 }
 497
 498 static const struct of_device_id cxd2880_spi_of_match[] = {
 499         { .compatible = "sony,cxd2880" },
 500         { /* sentinel */ }
 501 };
 502
 503 MODULE_DEVICE_TABLE(of, cxd2880_spi_of_match);
 504
 505 static int
 506 cxd2880_spi_probe(struct spi_device *spi)
 507 {
 508         int ret;
 509         struct cxd2880_dvb_spi *dvb_spi = NULL;
 510         struct cxd2880_config config;
 511
 512         if (!spi) {
 513                 pr_err("invalid arg.\n");
 514                 return -EINVAL;
 515         }
 516
 517         dvb_spi = kzalloc(sizeof(struct cxd2880_dvb_spi), GFP_KERNEL);
 518         if (!dvb_spi)
 519                 return -ENOMEM;
 520
 521         dvb_spi->spi = spi;
 522         mutex_init(&dvb_spi->spi_mutex);
 523         dev_set_drvdata(&spi->dev, dvb_spi);
 524         config.spi = spi;
 525         config.spi_mutex = &dvb_spi->spi_mutex;
 526
 527         ret = dvb_register_adapter(&dvb_spi->adapter,
 528                                    "CXD2880",
 529                                    THIS_MODULE,
 530                                    &spi->dev,
 531                                    adapter_nr);
 532         if (ret < 0) {
 533                 pr_err("dvb_register_adapter() failed\n");
 534                 goto fail_adapter;
 535         }
 536
 537         if (!dvb_attach(cxd2880_attach, &dvb_spi->dvb_fe, &config)) {
 538                 pr_err("cxd2880_attach failed\n");
 539                 ret = -ENODEV;
 540                 goto fail_attach;
 541         }
 542
 543         ret = dvb_register_frontend(&dvb_spi->adapter,
 544                                     &dvb_spi->dvb_fe);
 545         if (ret < 0) {
 546                 pr_err("dvb_register_frontend() failed\n");
 547                 goto fail_frontend;
 548         }
 549
 550         dvb_spi->demux.dmx.capabilities = DMX_TS_FILTERING;
 551         dvb_spi->demux.priv = dvb_spi;
 552         dvb_spi->demux.filternum = CXD2880_MAX_FILTER_SIZE;
 553         dvb_spi->demux.feednum = CXD2880_MAX_FILTER_SIZE;
 554         dvb_spi->demux.start_feed = cxd2880_start_feed;
 555         dvb_spi->demux.stop_feed = cxd2880_stop_feed;
 556
 557         ret = dvb_dmx_init(&dvb_spi->demux);
 558         if (ret < 0) {
 559                 pr_err("dvb_dmx_init() failed\n");
 560                 goto fail_dmx;
 561         }
 562
 563         dvb_spi->dmxdev.filternum = CXD2880_MAX_FILTER_SIZE;
 564         dvb_spi->dmxdev.demux = &dvb_spi->demux.dmx;
 565         dvb_spi->dmxdev.capabilities = 0;
 566         ret = dvb_dmxdev_init(&dvb_spi->dmxdev,
 567                               &dvb_spi->adapter);
 568         if (ret < 0) {
 569                 pr_err("dvb_dmxdev_init() failed\n");
 570                 goto fail_dmxdev;
 571         }
 572
 573         dvb_spi->dmx_fe.source = DMX_FRONTEND_0;
 574         ret = dvb_spi->demux.dmx.add_frontend(&dvb_spi->demux.dmx,
 575                                               &dvb_spi->dmx_fe);
 576         if (ret < 0) {
 577                 pr_err("add_frontend() failed\n");
 578                 goto fail_dmx_fe;
 579         }
 580
 581         ret = dvb_spi->demux.dmx.connect_frontend(&dvb_spi->demux.dmx,
 582                                                   &dvb_spi->dmx_fe);
 583         if (ret < 0) {
 584                 pr_err("dvb_register_frontend() failed\n");
 585                 goto fail_fe_conn;
 586         }
 587
 588         pr_info("Sony CXD2880 has successfully attached.\n");
 589
 590         return 0;
 591
 592 fail_fe_conn:
 593         dvb_spi->demux.dmx.remove_frontend(&dvb_spi->demux.dmx,
 594                                            &dvb_spi->dmx_fe);
 595 fail_dmx_fe:
 596         dvb_dmxdev_release(&dvb_spi->dmxdev);
 597 fail_dmxdev:
 598         dvb_dmx_release(&dvb_spi->demux);
 599 fail_dmx:
 600         dvb_unregister_frontend(&dvb_spi->dvb_fe);
 601 fail_frontend:
 602         dvb_frontend_detach(&dvb_spi->dvb_fe);
 603 fail_attach:
 604         dvb_unregister_adapter(&dvb_spi->adapter);
 605 fail_adapter:
 606         kfree(dvb_spi);
 607         return ret;
 608 }
 609
 610 static int
 611 cxd2880_spi_remove(struct spi_device *spi)
 612 {
 613         struct cxd2880_dvb_spi *dvb_spi;
 614
 615         if (!spi) {
 616                 pr_err("invalid arg\n");
 617                 return -EINVAL;
 618         }
 619
 620         dvb_spi = dev_get_drvdata(&spi->dev);
 621
 622         if (!dvb_spi) {
 623                 pr_err("failed\n");
 624                 return -EINVAL;
 625         }
 626         dvb_spi->demux.dmx.remove_frontend(&dvb_spi->demux.dmx,
 627                                            &dvb_spi->dmx_fe);
 628         dvb_dmxdev_release(&dvb_spi->dmxdev);
 629         dvb_dmx_release(&dvb_spi->demux);
 630         dvb_unregister_frontend(&dvb_spi->dvb_fe);
 631         dvb_frontend_detach(&dvb_spi->dvb_fe);
 632         dvb_unregister_adapter(&dvb_spi->adapter);
 633
 634         kfree(dvb_spi);
 635         pr_info("cxd2880_spi remove ok.\n");
 636
 637         return 0;
 638 }
 639
 640 static const struct spi_device_id cxd2880_spi_id[] = {
 641         { "cxd2880", 0 },
 642         { /* sentinel */ }
 643 };
 644 MODULE_DEVICE_TABLE(spi, cxd2880_spi_id);
 645
 646 static struct spi_driver cxd2880_spi_driver = {
 647         .driver = {
 648                 .name   = "cxd2880",
 649                 .of_match_table = cxd2880_spi_of_match,
 650         },
 651         .id_table = cxd2880_spi_id,
 652         .probe    = cxd2880_spi_probe,
 653         .remove   = cxd2880_spi_remove,
 654 };
 655 module_spi_driver(cxd2880_spi_driver);
 656
 657 MODULE_DESCRIPTION("Sony CXD2880 DVB-T2/T tuner + demod driver SPI adapter");
 658 MODULE_AUTHOR("Sony Semiconductor Solutions Corporation");
 659 MODULE_LICENSE("GPL v2");