drivers/media/dvb-frontends/mxl692.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Driver for the MaxLinear MxL69x family of combo tuners/demods
   4  *
   5  * Copyright (C) 2020 Brad Love <brad@nextdimension.cc>
   6  *
   7  * based on code:
   8  * Copyright (c) 2016 MaxLinear, Inc. All rights reserved
   9  * which was released under GPL V2
  10  */
  11
  12 #include <linux/mutex.h>
  13 #include <linux/i2c-mux.h>
  14 #include <linux/string.h>
  15 #include <linux/firmware.h>
  16
  17 #include "mxl692.h"
  18 #include "mxl692_defs.h"
  19
  20 static const struct dvb_frontend_ops mxl692_ops;
  21
  22 struct mxl692_dev {
  23         struct dvb_frontend fe;
  24         struct i2c_client *i2c_client;
  25         struct mutex i2c_lock;          /* i2c command mutex */
  26         enum MXL_EAGLE_DEMOD_TYPE_E demod_type;
  27         enum MXL_EAGLE_POWER_MODE_E power_mode;
  28         u32 current_frequency;
  29         int device_type;
  30         int seqnum;
  31         int init_done;
  32 };
  33
  34 static int mxl692_i2c_write(struct mxl692_dev *dev, u8 *buffer, u16 buf_len)
  35 {
  36         int ret = 0;
  37         struct i2c_msg msg = {
  38                 .addr = dev->i2c_client->addr,
  39                 .flags = 0,
  40                 .buf = buffer,
  41                 .len = buf_len
  42         };
  43
  44         ret = i2c_transfer(dev->i2c_client->adapter, &msg, 1);
  45         if (ret != 1)
  46                 dev_dbg(&dev->i2c_client->dev, "i2c write error!\n");
  47
  48         return ret;
  49 }
  50
  51 static int mxl692_i2c_read(struct mxl692_dev *dev, u8 *buffer, u16 buf_len)
  52 {
  53         int ret = 0;
  54         struct i2c_msg msg = {
  55                 .addr = dev->i2c_client->addr,
  56                 .flags = I2C_M_RD,
  57                 .buf = buffer,
  58                 .len = buf_len
  59         };
  60
  61         ret = i2c_transfer(dev->i2c_client->adapter, &msg, 1);
  62         if (ret != 1)
  63                 dev_dbg(&dev->i2c_client->dev, "i2c read error!\n");
  64
  65         return ret;
  66 }
  67
  68 static int convert_endian(u32 size, u8 *d)
  69 {
  70         u32 i;
  71
  72         for (i = 0; i < (size & ~3); i += 4) {
  73                 d[i + 0] ^= d[i + 3];
  74                 d[i + 3] ^= d[i + 0];
  75                 d[i + 0] ^= d[i + 3];
  76
  77                 d[i + 1] ^= d[i + 2];
  78                 d[i + 2] ^= d[i + 1];
  79                 d[i + 1] ^= d[i + 2];
  80         }
  81
  82         switch (size & 3) {
  83         case 0:
  84         case 1:
  85                 /* do nothing */
  86                 break;
  87         case 2:
  88                 d[i + 0] ^= d[i + 1];
  89                 d[i + 1] ^= d[i + 0];
  90                 d[i + 0] ^= d[i + 1];
  91                 break;
  92
  93         case 3:
  94                 d[i + 0] ^= d[i + 2];
  95                 d[i + 2] ^= d[i + 0];
  96                 d[i + 0] ^= d[i + 2];
  97                 break;
  98         }
  99         return size;
 100 }
 101
 102 static int convert_endian_n(int n, u32 size, u8 *d)
 103 {
 104         int i, count = 0;
 105
 106         for (i = 0; i < n; i += size)
 107                 count += convert_endian(size, d + i);
 108         return count;
 109 }
 110
 111 static void mxl692_tx_swap(enum MXL_EAGLE_OPCODE_E opcode, u8 *buffer)
 112 {
 113 #ifdef __BIG_ENDIAN
 114         return;
 115 #endif
 116         buffer += MXL_EAGLE_HOST_MSG_HEADER_SIZE; /* skip API header */
 117
 118         switch (opcode) {
 119         case MXL_EAGLE_OPCODE_DEVICE_INTR_MASK_SET:
 120         case MXL_EAGLE_OPCODE_TUNER_CHANNEL_TUNE_SET:
 121         case MXL_EAGLE_OPCODE_SMA_TRANSMIT_SET:
 122                 buffer += convert_endian(sizeof(u32), buffer);
 123                 break;
 124         case MXL_EAGLE_OPCODE_QAM_PARAMS_SET:
 125                 buffer += 5;
 126                 buffer += convert_endian(2 * sizeof(u32), buffer);
 127                 break;
 128         default:
 129                 /* no swapping - all get opcodes */
 130                 /* ATSC/OOB no swapping */
 131                 break;
 132         }
 133 }
 134
 135 static void mxl692_rx_swap(enum MXL_EAGLE_OPCODE_E opcode, u8 *buffer)
 136 {
 137 #ifdef __BIG_ENDIAN
 138         return;
 139 #endif
 140         buffer += MXL_EAGLE_HOST_MSG_HEADER_SIZE; /* skip API header */
 141
 142         switch (opcode) {
 143         case MXL_EAGLE_OPCODE_TUNER_AGC_STATUS_GET:
 144                 buffer++;
 145                 buffer += convert_endian(2 * sizeof(u16), buffer);
 146                 break;
 147         case MXL_EAGLE_OPCODE_ATSC_STATUS_GET:
 148                 buffer += convert_endian_n(2, sizeof(u16), buffer);
 149                 buffer += convert_endian(sizeof(u32), buffer);
 150                 break;
 151         case MXL_EAGLE_OPCODE_ATSC_ERROR_COUNTERS_GET:
 152                 buffer += convert_endian(3 * sizeof(u32), buffer);
 153                 break;
 154         case MXL_EAGLE_OPCODE_ATSC_EQUALIZER_FILTER_FFE_TAPS_GET:
 155                 buffer += convert_endian_n(24, sizeof(u16), buffer);
 156                 break;
 157         case MXL_EAGLE_OPCODE_QAM_STATUS_GET:
 158                 buffer += 8;
 159                 buffer += convert_endian_n(2, sizeof(u16), buffer);
 160                 buffer += convert_endian(sizeof(u32), buffer);
 161                 break;
 162         case MXL_EAGLE_OPCODE_QAM_ERROR_COUNTERS_GET:
 163                 buffer += convert_endian(7 * sizeof(u32), buffer);
 164                 break;
 165         case MXL_EAGLE_OPCODE_QAM_CONSTELLATION_VALUE_GET:
 166         case MXL_EAGLE_OPCODE_QAM_EQUALIZER_FILTER_DFE_START_GET:
 167         case MXL_EAGLE_OPCODE_QAM_EQUALIZER_FILTER_DFE_MIDDLE_GET:
 168         case MXL_EAGLE_OPCODE_QAM_EQUALIZER_FILTER_DFE_END_GET:
 169         case MXL_EAGLE_OPCODE_QAM_EQUALIZER_FILTER_SPUR_START_GET:
 170                 buffer += convert_endian_n(24, sizeof(u16), buffer);
 171                 break;
 172         case MXL_EAGLE_OPCODE_QAM_EQUALIZER_FILTER_SPUR_END_GET:
 173                 buffer += convert_endian_n(8, sizeof(u16), buffer);
 174                 break;
 175         case MXL_EAGLE_OPCODE_QAM_EQUALIZER_FILTER_FFE_GET:
 176                 buffer += convert_endian_n(17, sizeof(u16), buffer);
 177                 break;
 178         case MXL_EAGLE_OPCODE_OOB_ERROR_COUNTERS_GET:
 179                 buffer += convert_endian(3 * sizeof(u32), buffer);
 180                 break;
 181         case MXL_EAGLE_OPCODE_OOB_STATUS_GET:
 182                 buffer += convert_endian_n(2, sizeof(u16), buffer);
 183                 buffer += convert_endian(sizeof(u32), buffer);
 184                 break;
 185         case MXL_EAGLE_OPCODE_SMA_RECEIVE_GET:
 186                 buffer += convert_endian(sizeof(u32), buffer);
 187                 break;
 188         default:
 189                 /* no swapping - all set opcodes */
 190                 break;
 191         }
 192 }
 193
 194 static u32 mxl692_checksum(u8 *buffer, u32 size)
 195 {
 196         u32 ix, div_size;
 197         u32 cur_cksum = 0;
 198         __be32 *buf;
 199
 200         div_size = DIV_ROUND_UP(size, 4);
 201
 202         buf = (__be32 *)buffer;
 203         for (ix = 0; ix < div_size; ix++)
 204                 cur_cksum += be32_to_cpu(buf[ix]);
 205
 206         cur_cksum ^= 0xDEADBEEF;
 207
 208         return cur_cksum;
 209 }
 210
 211 static int mxl692_validate_fw_header(struct mxl692_dev *dev,
 212                                      const u8 *buffer, u32 buf_len)
 213 {
 214         int status = 0;
 215         u32 ix, temp;
 216         __be32 *local_buf = NULL;
 217         u8 temp_cksum = 0;
 218         static const u8 fw_hdr[] = {
 219                 0x4D, 0x31, 0x10, 0x02, 0x40, 0x00, 0x00, 0x80
 220         };
 221
 222         if (memcmp(buffer, fw_hdr, 8) != 0) {
 223                 status = -EINVAL;
 224                 goto err_finish;
 225         }
 226
 227         local_buf = (__be32 *)(buffer + 8);
 228         temp = be32_to_cpu(*local_buf);
 229
 230         if ((buf_len - 16) != temp >> 8) {
 231                 status = -EINVAL;
 232                 goto err_finish;
 233         }
 234
 235         for (ix = 16; ix < buf_len; ix++)
 236                 temp_cksum += buffer[ix];
 237
 238         if (temp_cksum != buffer[11])
 239                 status = -EINVAL;
 240
 241 err_finish:
 242         if (status)
 243                 dev_dbg(&dev->i2c_client->dev, "failed\n");
 244         return status;
 245 }
 246
 247 static int mxl692_write_fw_block(struct mxl692_dev *dev, const u8 *buffer,
 248                                  u32 buf_len, u32 *index)
 249 {
 250         int status = 0;
 251         u32 ix = 0, total_len = 0, addr = 0, chunk_len = 0, prevchunk_len = 0;
 252         u8 local_buf[MXL_EAGLE_MAX_I2C_PACKET_SIZE] = {}, *plocal_buf = NULL;
 253         int payload_max = MXL_EAGLE_MAX_I2C_PACKET_SIZE - MXL_EAGLE_I2C_MHEADER_SIZE;
 254
 255         ix = *index;
 256
 257         if (buffer[ix] == 0x53) {
 258                 total_len = buffer[ix + 1] << 16 | buffer[ix + 2] << 8 | buffer[ix + 3];
 259                 total_len = (total_len + 3) & ~3;
 260                 addr      = buffer[ix + 4] << 24 | buffer[ix + 5] << 16 |
 261                             buffer[ix + 6] << 8 | buffer[ix + 7];
 262                 ix       += MXL_EAGLE_FW_SEGMENT_HEADER_SIZE;
 263
 264                 while ((total_len > 0) && (status == 0)) {
 265                         plocal_buf = local_buf;
 266                         chunk_len  = (total_len < payload_max) ? total_len : payload_max;
 267
 268                         *plocal_buf++ = 0xFC;
 269                         *plocal_buf++ = chunk_len + sizeof(u32);
 270
 271                         *(u32 *)plocal_buf = addr + prevchunk_len;
 272 #ifdef __BIG_ENDIAN
 273                         convert_endian(sizeof(u32), plocal_buf);
 274 #endif
 275                         plocal_buf += sizeof(u32);
 276
 277                         memcpy(plocal_buf, &buffer[ix], chunk_len);
 278                         convert_endian(chunk_len, plocal_buf);
 279                         if (mxl692_i2c_write(dev, local_buf,
 280                                              (chunk_len + MXL_EAGLE_I2C_MHEADER_SIZE)) < 0) {
 281                                 status = -EREMOTEIO;
 282                                 break;
 283                         }
 284
 285                         prevchunk_len += chunk_len;
 286                         total_len -= chunk_len;
 287                         ix += chunk_len;
 288                 }
 289                 *index = ix;
 290         } else {
 291                 status = -EINVAL;
 292         }
 293
 294         if (status)
 295                 dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 296
 297         return status;
 298 }
 299
 300 static int mxl692_memwrite(struct mxl692_dev *dev, u32 addr,
 301                            u8 *buffer, u32 size)
 302 {
 303         int status = 0, total_len = 0;
 304         u8 local_buf[MXL_EAGLE_MAX_I2C_PACKET_SIZE] = {}, *plocal_buf = NULL;
 305
 306         total_len = size;
 307         total_len = (total_len + 3) & ~3;  /* 4 byte alignment */
 308
 309         if (total_len > (MXL_EAGLE_MAX_I2C_PACKET_SIZE - MXL_EAGLE_I2C_MHEADER_SIZE))
 310                 dev_dbg(&dev->i2c_client->dev, "hrmph?\n");
 311
 312         plocal_buf = local_buf;
 313
 314         *plocal_buf++ = 0xFC;
 315         *plocal_buf++ = total_len + sizeof(u32);
 316
 317         *(u32 *)plocal_buf = addr;
 318         plocal_buf += sizeof(u32);
 319
 320         memcpy(plocal_buf, buffer, total_len);
 321 #ifdef __BIG_ENDIAN
 322         convert_endian(sizeof(u32) + total_len, local_buf + 2);
 323 #endif
 324         if (mxl692_i2c_write(dev, local_buf,
 325                              (total_len + MXL_EAGLE_I2C_MHEADER_SIZE)) < 0) {
 326                 status = -EREMOTEIO;
 327                 goto err_finish;
 328         }
 329
 330         return status;
 331 err_finish:
 332         dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 333         return status;
 334 }
 335
 336 static int mxl692_memread(struct mxl692_dev *dev, u32 addr,
 337                           u8 *buffer, u32 size)
 338 {
 339         int status = 0;
 340         u8 local_buf[MXL_EAGLE_I2C_MHEADER_SIZE] = {}, *plocal_buf = NULL;
 341
 342         plocal_buf = local_buf;
 343
 344         *plocal_buf++ = 0xFB;
 345         *plocal_buf++ = sizeof(u32);
 346         *(u32 *)plocal_buf = addr;
 347 #ifdef __BIG_ENDIAN
 348         convert_endian(sizeof(u32), plocal_buf);
 349 #endif
 350         mutex_lock(&dev->i2c_lock);
 351
 352         if (mxl692_i2c_write(dev, local_buf, MXL_EAGLE_I2C_MHEADER_SIZE) > 0) {
 353                 size = (size + 3) & ~3;  /* 4 byte alignment */
 354                 status = mxl692_i2c_read(dev, buffer, (u16)size) < 0 ? -EREMOTEIO : 0;
 355 #ifdef __BIG_ENDIAN
 356                 if (status == 0)
 357                         convert_endian(size, buffer);
 358 #endif
 359         } else {
 360                 status = -EREMOTEIO;
 361         }
 362
 363         mutex_unlock(&dev->i2c_lock);
 364
 365         if (status)
 366                 dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 367
 368         return status;
 369 }
 370
 371 static const char *mxl692_opcode_string(u8 opcode)
 372 {
 373         if (opcode <= MXL_EAGLE_OPCODE_INTERNAL)
 374                 return MXL_EAGLE_OPCODE_STRING[opcode];
 375
 376         return "invalid opcode";
 377 }
 378
 379 static int mxl692_opwrite(struct mxl692_dev *dev, u8 *buffer,
 380                           u32 size)
 381 {
 382         int status = 0, total_len = 0;
 383         u8 local_buf[MXL_EAGLE_MAX_I2C_PACKET_SIZE] = {}, *plocal_buf = NULL;
 384         struct MXL_EAGLE_HOST_MSG_HEADER_T *tx_hdr = (struct MXL_EAGLE_HOST_MSG_HEADER_T *)buffer;
 385
 386         total_len = size;
 387         total_len = (total_len + 3) & ~3;  /* 4 byte alignment */
 388
 389         if (total_len > (MXL_EAGLE_MAX_I2C_PACKET_SIZE - MXL_EAGLE_I2C_PHEADER_SIZE))
 390                 dev_dbg(&dev->i2c_client->dev, "hrmph?\n");
 391
 392         plocal_buf = local_buf;
 393
 394         *plocal_buf++ = 0xFE;
 395         *plocal_buf++ = (u8)total_len;
 396
 397         memcpy(plocal_buf, buffer, total_len);
 398         convert_endian(total_len, plocal_buf);
 399
 400         if (mxl692_i2c_write(dev, local_buf,
 401                              (total_len + MXL_EAGLE_I2C_PHEADER_SIZE)) < 0) {
 402                 status = -EREMOTEIO;
 403                 goto err_finish;
 404         }
 405 err_finish:
 406         if (status)
 407                 dev_dbg(&dev->i2c_client->dev, "opcode %s  err %d\n",
 408                         mxl692_opcode_string(tx_hdr->opcode), status);
 409         return status;
 410 }
 411
 412 static int mxl692_opread(struct mxl692_dev *dev, u8 *buffer,
 413                          u32 size)
 414 {
 415         int status = 0;
 416         u32 ix = 0;
 417         u8 local_buf[MXL_EAGLE_I2C_PHEADER_SIZE] = {};
 418
 419         local_buf[0] = 0xFD;
 420         local_buf[1] = 0;
 421
 422         if (mxl692_i2c_write(dev, local_buf, MXL_EAGLE_I2C_PHEADER_SIZE) > 0) {
 423                 size = (size + 3) & ~3;  /* 4 byte alignment */
 424
 425                 /* Read in 4 byte chunks */
 426                 for (ix = 0; ix < size; ix += 4) {
 427                         if (mxl692_i2c_read(dev, buffer + ix, 4) < 0) {
 428                                 dev_dbg(&dev->i2c_client->dev, "ix=%d   size=%d\n", ix, size);
 429                                 status = -EREMOTEIO;
 430                                 goto err_finish;
 431                         }
 432                 }
 433                 convert_endian(size, buffer);
 434         } else {
 435                 status = -EREMOTEIO;
 436         }
 437 err_finish:
 438         if (status)
 439                 dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 440         return status;
 441 }
 442
 443 static int mxl692_i2c_writeread(struct mxl692_dev *dev,
 444                                 u8 opcode,
 445                                 u8 *tx_payload,
 446                                 u8 tx_payload_size,
 447                                 u8 *rx_payload,
 448                                 u8 rx_payload_expected)
 449 {
 450         int status = 0, timeout = 40;
 451         u8 tx_buf[MXL_EAGLE_MAX_I2C_PACKET_SIZE] = {};
 452         u8 rx_buf[MXL_EAGLE_MAX_I2C_PACKET_SIZE] = {};
 453         u32 resp_checksum = 0, resp_checksum_tmp = 0;
 454         struct MXL_EAGLE_HOST_MSG_HEADER_T *tx_header;
 455         struct MXL_EAGLE_HOST_MSG_HEADER_T *rx_header;
 456
 457         mutex_lock(&dev->i2c_lock);
 458
 459         if ((tx_payload_size + MXL_EAGLE_HOST_MSG_HEADER_SIZE) >
 460             (MXL_EAGLE_MAX_I2C_PACKET_SIZE - MXL_EAGLE_I2C_PHEADER_SIZE)) {
 461                 status = -EINVAL;
 462                 goto err_finish;
 463         }
 464
 465         tx_header = (struct MXL_EAGLE_HOST_MSG_HEADER_T *)tx_buf;
 466         tx_header->opcode = opcode;
 467         tx_header->seqnum = dev->seqnum++;
 468         tx_header->payload_size = tx_payload_size;
 469         tx_header->checksum = 0;
 470
 471         if (dev->seqnum == 0)
 472                 dev->seqnum = 1;
 473
 474         if (tx_payload && tx_payload_size > 0)
 475                 memcpy(&tx_buf[MXL_EAGLE_HOST_MSG_HEADER_SIZE], tx_payload, tx_payload_size);
 476
 477         mxl692_tx_swap(opcode, tx_buf);
 478
 479         tx_header->checksum = 0;
 480         tx_header->checksum = mxl692_checksum(tx_buf,
 481                                               MXL_EAGLE_HOST_MSG_HEADER_SIZE + tx_payload_size);
 482 #ifdef __LITTLE_ENDIAN
 483         convert_endian(4, (u8 *)&tx_header->checksum); /* cksum is big endian */
 484 #endif
 485         /* send Tx message */
 486         status = mxl692_opwrite(dev, tx_buf,
 487                                 tx_payload_size + MXL_EAGLE_HOST_MSG_HEADER_SIZE);
 488         if (status) {
 489                 status = -EREMOTEIO;
 490                 goto err_finish;
 491         }
 492
 493         /* receive Rx message (polling) */
 494         rx_header = (struct MXL_EAGLE_HOST_MSG_HEADER_T *)rx_buf;
 495
 496         do {
 497                 status = mxl692_opread(dev, rx_buf,
 498                                        rx_payload_expected + MXL_EAGLE_HOST_MSG_HEADER_SIZE);
 499                 usleep_range(1000, 2000);
 500                 timeout--;
 501         } while ((timeout > 0) && (status == 0) &&
 502                  (rx_header->seqnum == 0) &&
 503                  (rx_header->checksum == 0));
 504
 505         if (timeout == 0 || status) {
 506                 dev_dbg(&dev->i2c_client->dev, "timeout=%d   status=%d\n",
 507                         timeout, status);
 508                 status = -ETIMEDOUT;
 509                 goto err_finish;
 510         }
 511
 512         if (rx_header->status) {
 513                 dev_dbg(&dev->i2c_client->dev, "rx header status code: %d\n", rx_header->status);
 514                 status = -EREMOTEIO;
 515                 goto err_finish;
 516         }
 517
 518         if (rx_header->seqnum != tx_header->seqnum ||
 519             rx_header->opcode != tx_header->opcode ||
 520             rx_header->payload_size != rx_payload_expected) {
 521                 dev_dbg(&dev->i2c_client->dev, "Something failed seq=%s  opcode=%s  pSize=%s\n",
 522                         rx_header->seqnum != tx_header->seqnum ? "X" : "0",
 523                         rx_header->opcode != tx_header->opcode ? "X" : "0",
 524                         rx_header->payload_size != rx_payload_expected ? "X" : "0");
 525                 if (rx_header->payload_size != rx_payload_expected)
 526                         dev_dbg(&dev->i2c_client->dev,
 527                                 "rx_header->payloadSize=%d   rx_payload_expected=%d\n",
 528                                 rx_header->payload_size, rx_payload_expected);
 529                 status = -EREMOTEIO;
 530                 goto err_finish;
 531         }
 532
 533         resp_checksum = rx_header->checksum;
 534         rx_header->checksum = 0;
 535
 536         resp_checksum_tmp = mxl692_checksum(rx_buf,
 537                                             MXL_EAGLE_HOST_MSG_HEADER_SIZE + rx_header->payload_size);
 538 #ifdef __LITTLE_ENDIAN
 539         convert_endian(4, (u8 *)&resp_checksum_tmp); /* cksum is big endian */
 540 #endif
 541         if (resp_checksum != resp_checksum_tmp) {
 542                 dev_dbg(&dev->i2c_client->dev, "rx checksum failure\n");
 543                 status = -EREMOTEIO;
 544                 goto err_finish;
 545         }
 546
 547         mxl692_rx_swap(rx_header->opcode, rx_buf);
 548
 549         if (rx_header->payload_size > 0) {
 550                 if (!rx_payload) {
 551                         dev_dbg(&dev->i2c_client->dev, "no rx payload?!?\n");
 552                         status = -EREMOTEIO;
 553                         goto err_finish;
 554                 }
 555                 memcpy(rx_payload, rx_buf + MXL_EAGLE_HOST_MSG_HEADER_SIZE,
 556                        rx_header->payload_size);
 557         }
 558 err_finish:
 559         if (status)
 560                 dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 561
 562         mutex_unlock(&dev->i2c_lock);
 563         return status;
 564 }
 565
 566 static int mxl692_fwdownload(struct mxl692_dev *dev,
 567                              const u8 *firmware_buf, u32 buf_len)
 568 {
 569         int status = 0;
 570         u32 ix, reg_val = 0x1;
 571         u8 rx_buf[MXL_EAGLE_MAX_I2C_PACKET_SIZE] = {};
 572         struct MXL_EAGLE_DEV_STATUS_T *dev_status;
 573
 574         if (buf_len < MXL_EAGLE_FW_HEADER_SIZE ||
 575             buf_len > MXL_EAGLE_FW_MAX_SIZE_IN_KB * 1000)
 576                 return -EINVAL;
 577
 578         mutex_lock(&dev->i2c_lock);
 579
 580         dev_dbg(&dev->i2c_client->dev, "\n");
 581
 582         status = mxl692_validate_fw_header(dev, firmware_buf, buf_len);
 583         if (status)
 584                 goto err_finish;
 585
 586         ix = 16;
 587         status = mxl692_write_fw_block(dev, firmware_buf, buf_len, &ix); /* DRAM */
 588         if (status)
 589                 goto err_finish;
 590
 591         status = mxl692_write_fw_block(dev, firmware_buf, buf_len, &ix); /* IRAM */
 592         if (status)
 593                 goto err_finish;
 594
 595         /* release CPU from reset */
 596         status = mxl692_memwrite(dev, 0x70000018, (u8 *)&reg_val, sizeof(u32));
 597         if (status)
 598                 goto err_finish;
 599
 600         mutex_unlock(&dev->i2c_lock);
 601
 602         if (status == 0) {
 603                 /* verify FW is alive */
 604                 usleep_range(MXL_EAGLE_FW_LOAD_TIME * 1000, (MXL_EAGLE_FW_LOAD_TIME + 5) * 1000);
 605                 dev_status = (struct MXL_EAGLE_DEV_STATUS_T *)&rx_buf;
 606                 status = mxl692_i2c_writeread(dev,
 607                                               MXL_EAGLE_OPCODE_DEVICE_STATUS_GET,
 608                                               NULL,
 609                                               0,
 610                                               (u8 *)dev_status,
 611                                               sizeof(struct MXL_EAGLE_DEV_STATUS_T));
 612         }
 613
 614         return status;
 615 err_finish:
 616         mutex_unlock(&dev->i2c_lock);
 617         if (status)
 618                 dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 619         return status;
 620 }
 621
 622 static int mxl692_get_versions(struct mxl692_dev *dev)
 623 {
 624         int status = 0;
 625         struct MXL_EAGLE_DEV_VER_T dev_ver = {};
 626         static const char * const chip_id[] = {"N/A", "691", "248", "692"};
 627
 628         status = mxl692_i2c_writeread(dev, MXL_EAGLE_OPCODE_DEVICE_VERSION_GET,
 629                                       NULL,
 630                                       0,
 631                                       (u8 *)&dev_ver,
 632                                       sizeof(struct MXL_EAGLE_DEV_VER_T));
 633         if (status)
 634                 return status;
 635
 636         dev_info(&dev->i2c_client->dev, "MxL692_DEMOD Chip ID: %s\n",
 637                  chip_id[dev_ver.chip_id]);
 638
 639         dev_info(&dev->i2c_client->dev,
 640                  "MxL692_DEMOD FW Version: %d.%d.%d.%d_RC%d\n",
 641                  dev_ver.firmware_ver[0],
 642                  dev_ver.firmware_ver[1],
 643                  dev_ver.firmware_ver[2],
 644                  dev_ver.firmware_ver[3],
 645                  dev_ver.firmware_ver[4]);
 646
 647         return status;
 648 }
 649
 650 static int mxl692_reset(struct mxl692_dev *dev)
 651 {
 652         int status = 0;
 653         u32 dev_type = MXL_EAGLE_DEVICE_MAX, reg_val = 0x2;
 654
 655         dev_dbg(&dev->i2c_client->dev, "\n");
 656
 657         /* legacy i2c override */
 658         status = mxl692_memwrite(dev, 0x80000100, (u8 *)&reg_val, sizeof(u32));
 659         if (status)
 660                 goto err_finish;
 661
 662         /* verify sku */
 663         status = mxl692_memread(dev, 0x70000188, (u8 *)&dev_type, sizeof(u32));
 664         if (status)
 665                 goto err_finish;
 666
 667         if (dev_type != dev->device_type)
 668                 goto err_finish;
 669
 670 err_finish:
 671         if (status)
 672                 dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 673         return status;
 674 }
 675
 676 static int mxl692_config_regulators(struct mxl692_dev *dev,
 677                                     enum MXL_EAGLE_POWER_SUPPLY_SOURCE_E power_supply)
 678 {
 679         int status = 0;
 680         u32 reg_val;
 681
 682         dev_dbg(&dev->i2c_client->dev, "\n");
 683
 684         /* configure main regulator according to the power supply source */
 685         status = mxl692_memread(dev, 0x90000000, (u8 *)&reg_val, sizeof(u32));
 686         if (status)
 687                 goto err_finish;
 688
 689         reg_val &= 0x00FFFFFF;
 690         reg_val |= (power_supply == MXL_EAGLE_POWER_SUPPLY_SOURCE_SINGLE) ?
 691                                         0x14000000 : 0x10000000;
 692
 693         status = mxl692_memwrite(dev, 0x90000000, (u8 *)&reg_val, sizeof(u32));
 694         if (status)
 695                 goto err_finish;
 696
 697         /* configure digital regulator to high current mode */
 698         status = mxl692_memread(dev, 0x90000018, (u8 *)&reg_val, sizeof(u32));
 699         if (status)
 700                 goto err_finish;
 701
 702         reg_val |= 0x800;
 703
 704         status = mxl692_memwrite(dev, 0x90000018, (u8 *)&reg_val, sizeof(u32));
 705
 706 err_finish:
 707         if (status)
 708                 dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 709         return status;
 710 }
 711
 712 static int mxl692_config_xtal(struct mxl692_dev *dev,
 713                               struct MXL_EAGLE_DEV_XTAL_T *dev_xtal)
 714 {
 715         int status = 0;
 716         u32 reg_val, reg_val1;
 717
 718         dev_dbg(&dev->i2c_client->dev, "\n");
 719
 720         status = mxl692_memread(dev, 0x90000000, (u8 *)&reg_val, sizeof(u32));
 721         if (status)
 722                 goto err_finish;
 723
 724         /* set XTAL capacitance */
 725         reg_val &= 0xFFFFFFE0;
 726         reg_val |= dev_xtal->xtal_cap;
 727
 728         /* set CLK OUT */
 729         reg_val = dev_xtal->clk_out_enable ? (reg_val | 0x0100) : (reg_val & 0xFFFFFEFF);
 730
 731         status = mxl692_memwrite(dev, 0x90000000, (u8 *)&reg_val, sizeof(u32));
 732         if (status)
 733                 goto err_finish;
 734
 735         /* set CLK OUT divider */
 736         reg_val = dev_xtal->clk_out_div_enable ? (reg_val | 0x0200) : (reg_val & 0xFFFFFDFF);
 737
 738         status = mxl692_memwrite(dev, 0x90000000, (u8 *)&reg_val, sizeof(u32));
 739         if (status)
 740                 goto err_finish;
 741
 742         /* set XTAL sharing */
 743         reg_val = dev_xtal->xtal_sharing_enable ? (reg_val | 0x010400) : (reg_val & 0xFFFEFBFF);
 744
 745         status = mxl692_memwrite(dev, 0x90000000, (u8 *)&reg_val, sizeof(u32));
 746         if (status)
 747                 goto err_finish;
 748
 749         /* enable/disable XTAL calibration, based on master/slave device */
 750         status = mxl692_memread(dev, 0x90000030, (u8 *)&reg_val1, sizeof(u32));
 751         if (status)
 752                 goto err_finish;
 753
 754         if (dev_xtal->xtal_calibration_enable) {
 755                 /* enable XTAL calibration and set XTAL amplitude to a higher value */
 756                 reg_val1 &= 0xFFFFFFFD;
 757                 reg_val1 |= 0x30;
 758
 759                 status = mxl692_memwrite(dev, 0x90000030, (u8 *)&reg_val1, sizeof(u32));
 760                 if (status)
 761                         goto err_finish;
 762         } else {
 763                 /* disable XTAL calibration */
 764                 reg_val1 |= 0x2;
 765
 766                 status = mxl692_memwrite(dev, 0x90000030, (u8 *)&reg_val1, sizeof(u32));
 767                 if (status)
 768                         goto err_finish;
 769
 770                 /* set XTAL bias value */
 771                 status = mxl692_memread(dev, 0x9000002c, (u8 *)&reg_val, sizeof(u32));
 772                 if (status)
 773                         goto err_finish;
 774
 775                 reg_val &= 0xC0FFFFFF;
 776                 reg_val |= 0xA000000;
 777
 778                 status = mxl692_memwrite(dev, 0x9000002c, (u8 *)&reg_val, sizeof(u32));
 779                 if (status)
 780                         goto err_finish;
 781         }
 782
 783         /* start XTAL calibration */
 784         status = mxl692_memread(dev, 0x70000010, (u8 *)&reg_val, sizeof(u32));
 785         if (status)
 786                 goto err_finish;
 787
 788         reg_val |= 0x8;
 789
 790         status = mxl692_memwrite(dev, 0x70000010, (u8 *)&reg_val, sizeof(u32));
 791         if (status)
 792                 goto err_finish;
 793
 794         status = mxl692_memread(dev, 0x70000018, (u8 *)&reg_val, sizeof(u32));
 795         if (status)
 796                 goto err_finish;
 797
 798         reg_val |= 0x10;
 799
 800         status = mxl692_memwrite(dev, 0x70000018, (u8 *)&reg_val, sizeof(u32));
 801         if (status)
 802                 goto err_finish;
 803
 804         status = mxl692_memread(dev, 0x9001014c, (u8 *)&reg_val, sizeof(u32));
 805         if (status)
 806                 goto err_finish;
 807
 808         reg_val &= 0xFFFFEFFF;
 809
 810         status = mxl692_memwrite(dev, 0x9001014c, (u8 *)&reg_val, sizeof(u32));
 811         if (status)
 812                 goto err_finish;
 813
 814         reg_val |= 0x1000;
 815
 816         status = mxl692_memwrite(dev, 0x9001014c, (u8 *)&reg_val, sizeof(u32));
 817         if (status)
 818                 goto err_finish;
 819
 820         usleep_range(45000, 55000);
 821
 822 err_finish:
 823         if (status)
 824                 dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 825         return status;
 826 }
 827
 828 static int mxl692_powermode(struct mxl692_dev *dev,
 829                             enum MXL_EAGLE_POWER_MODE_E power_mode)
 830 {
 831         int status = 0;
 832         u8 mode = power_mode;
 833
 834         dev_dbg(&dev->i2c_client->dev, "%s\n",
 835                 power_mode == MXL_EAGLE_POWER_MODE_SLEEP ? "sleep" : "active");
 836
 837         status = mxl692_i2c_writeread(dev,
 838                                       MXL_EAGLE_OPCODE_DEVICE_POWERMODE_SET,
 839                                       &mode,
 840                                       sizeof(u8),
 841                                       NULL,
 842                                       0);
 843         if (status) {
 844                 dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 845                 return status;
 846         }
 847
 848         dev->power_mode = power_mode;
 849
 850         return status;
 851 }
 852
 853 static int mxl692_init(struct dvb_frontend *fe)
 854 {
 855         struct mxl692_dev *dev = fe->demodulator_priv;
 856         struct i2c_client *client = dev->i2c_client;
 857         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 858         int status = 0;
 859         const struct firmware *firmware;
 860         struct MXL_EAGLE_DEV_XTAL_T xtal_config = {};
 861
 862         dev_dbg(&dev->i2c_client->dev, "\n");
 863
 864         if (dev->init_done)
 865                 goto warm;
 866
 867         dev->seqnum = 1;
 868
 869         status = mxl692_reset(dev);
 870         if (status)
 871                 goto err;
 872
 873         usleep_range(50 * 1000, 60 * 1000); /* was 1000! */
 874
 875         status = mxl692_config_regulators(dev, MXL_EAGLE_POWER_SUPPLY_SOURCE_DUAL);
 876         if (status)
 877                 goto err;
 878
 879         xtal_config.xtal_cap = 26;
 880         xtal_config.clk_out_div_enable = 0;
 881         xtal_config.clk_out_enable = 0;
 882         xtal_config.xtal_calibration_enable = 0;
 883         xtal_config.xtal_sharing_enable = 1;
 884         status = mxl692_config_xtal(dev, &xtal_config);
 885         if (status)
 886                 goto err;
 887
 888         status = request_firmware(&firmware, MXL692_FIRMWARE, &client->dev);
 889         if (status) {
 890                 dev_dbg(&dev->i2c_client->dev, "firmware missing? %s\n",
 891                         MXL692_FIRMWARE);
 892                 goto err;
 893         }
 894
 895         status = mxl692_fwdownload(dev, firmware->data, firmware->size);
 896         if (status)
 897                 goto err_release_firmware;
 898
 899         release_firmware(firmware);
 900
 901         status = mxl692_get_versions(dev);
 902         if (status)
 903                 goto err;
 904
 905         dev->power_mode = MXL_EAGLE_POWER_MODE_SLEEP;
 906 warm:
 907         /* Config Device Power Mode */
 908         if (dev->power_mode != MXL_EAGLE_POWER_MODE_ACTIVE) {
 909                 status = mxl692_powermode(dev, MXL_EAGLE_POWER_MODE_ACTIVE);
 910                 if (status)
 911                         goto err;
 912
 913                 usleep_range(50 * 1000, 60 * 1000); /* was 500! */
 914         }
 915
 916         /* Init stats here to indicate which stats are supported */
 917         c->cnr.len = 1;
 918         c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 919         c->post_bit_error.len = 1;
 920         c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 921         c->post_bit_count.len = 1;
 922         c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 923         c->block_error.len = 1;
 924         c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 925
 926         dev->init_done = 1;
 927         return 0;
 928 err_release_firmware:
 929         release_firmware(firmware);
 930 err:
 931         dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 932         return status;
 933 }
 934
 935 static int mxl692_sleep(struct dvb_frontend *fe)
 936 {
 937         struct mxl692_dev *dev = fe->demodulator_priv;
 938
 939         if (dev->power_mode != MXL_EAGLE_POWER_MODE_SLEEP)
 940                 mxl692_powermode(dev, MXL_EAGLE_POWER_MODE_SLEEP);
 941
 942         return 0;
 943 }
 944
 945 static int mxl692_set_frontend(struct dvb_frontend *fe)
 946 {
 947         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 948         struct mxl692_dev *dev = fe->demodulator_priv;
 949
 950         int status = 0;
 951         enum MXL_EAGLE_DEMOD_TYPE_E demod_type;
 952         struct MXL_EAGLE_MPEGOUT_PARAMS_T mpeg_params = {};
 953         enum MXL_EAGLE_QAM_DEMOD_ANNEX_TYPE_E qam_annex = MXL_EAGLE_QAM_DEMOD_ANNEX_B;
 954         struct MXL_EAGLE_QAM_DEMOD_PARAMS_T qam_params = {};
 955         struct MXL_EAGLE_TUNER_CHANNEL_PARAMS_T tuner_params = {};
 956         u8 op_param = 0;
 957
 958         dev_dbg(&dev->i2c_client->dev, "\n");
 959
 960         switch (p->modulation) {
 961         case VSB_8:
 962                 demod_type = MXL_EAGLE_DEMOD_TYPE_ATSC;
 963                 break;
 964         case QAM_AUTO:
 965         case QAM_64:
 966         case QAM_128:
 967         case QAM_256:
 968                 demod_type = MXL_EAGLE_DEMOD_TYPE_QAM;
 969                 break;
 970         default:
 971                 return -EINVAL;
 972         }
 973
 974         if (dev->current_frequency == p->frequency && dev->demod_type == demod_type) {
 975                 dev_dbg(&dev->i2c_client->dev, "already set up\n");
 976                 return 0;
 977         }
 978
 979         dev->current_frequency = -1;
 980         dev->demod_type = -1;
 981
 982         op_param = demod_type;
 983         status = mxl692_i2c_writeread(dev,
 984                                       MXL_EAGLE_OPCODE_DEVICE_DEMODULATOR_TYPE_SET,
 985                                       &op_param,
 986                                       sizeof(u8),
 987                                       NULL,
 988                                       0);
 989         if (status) {
 990                 dev_dbg(&dev->i2c_client->dev,
 991                         "DEVICE_DEMODULATOR_TYPE_SET...FAIL  err 0x%x\n", status);
 992                 goto err;
 993         }
 994
 995         usleep_range(20 * 1000, 30 * 1000); /* was 500! */
 996
 997         mpeg_params.mpeg_parallel = 0;
 998         mpeg_params.msb_first = MXL_EAGLE_DATA_SERIAL_MSB_1ST;
 999         mpeg_params.mpeg_sync_pulse_width = MXL_EAGLE_DATA_SYNC_WIDTH_BIT;
1000         mpeg_params.mpeg_valid_pol = MXL_EAGLE_CLOCK_POSITIVE;
1001         mpeg_params.mpeg_sync_pol = MXL_EAGLE_CLOCK_POSITIVE;
1002         mpeg_params.mpeg_clk_pol = MXL_EAGLE_CLOCK_NEGATIVE;
1003         mpeg_params.mpeg3wire_mode_enable = 0;
1004         mpeg_params.mpeg_clk_freq = MXL_EAGLE_MPEG_CLOCK_27MHZ;
1005
1006         switch (demod_type) {
1007         case MXL_EAGLE_DEMOD_TYPE_ATSC:
1008                 status = mxl692_i2c_writeread(dev,
1009                                               MXL_EAGLE_OPCODE_DEVICE_MPEG_OUT_PARAMS_SET,
1010                                               (u8 *)&mpeg_params,
1011                                               sizeof(struct MXL_EAGLE_MPEGOUT_PARAMS_T),
1012                                               NULL,
1013                                               0);
1014                 if (status)
1015                         goto err;
1016                 break;
1017         case MXL_EAGLE_DEMOD_TYPE_QAM:
1018                 if (qam_annex == MXL_EAGLE_QAM_DEMOD_ANNEX_A)
1019                         mpeg_params.msb_first = MXL_EAGLE_DATA_SERIAL_LSB_1ST;
1020                 status = mxl692_i2c_writeread(dev,
1021                                               MXL_EAGLE_OPCODE_DEVICE_MPEG_OUT_PARAMS_SET,
1022                                               (u8 *)&mpeg_params,
1023                                               sizeof(struct MXL_EAGLE_MPEGOUT_PARAMS_T),
1024                                               NULL,
1025                                               0);
1026                 if (status)
1027                         goto err;
1028
1029                 qam_params.annex_type = qam_annex;
1030                 qam_params.qam_type = MXL_EAGLE_QAM_DEMOD_AUTO;
1031                 qam_params.iq_flip = MXL_EAGLE_DEMOD_IQ_AUTO;
1032                 if (p->modulation == QAM_64)
1033                         qam_params.symbol_rate_hz = 5057000;
1034                 else
1035                         qam_params.symbol_rate_hz = 5361000;
1036
1037                 qam_params.symbol_rate_256qam_hz = 5361000;
1038
1039                 status = mxl692_i2c_writeread(dev,
1040                                               MXL_EAGLE_OPCODE_QAM_PARAMS_SET,
1041                                               (u8 *)&qam_params,
1042                                               sizeof(struct MXL_EAGLE_QAM_DEMOD_PARAMS_T),
1043                                               NULL, 0);
1044                 if (status)
1045                         goto err;
1046
1047                 break;
1048         default:
1049                 break;
1050         }
1051
1052         usleep_range(20 * 1000, 30 * 1000); /* was 500! */
1053
1054         tuner_params.freq_hz = p->frequency;
1055         tuner_params.bandwidth = MXL_EAGLE_TUNER_BW_6MHZ;
1056         tuner_params.tune_mode = MXL_EAGLE_TUNER_CHANNEL_TUNE_MODE_VIEW;
1057
1058         dev_dbg(&dev->i2c_client->dev, " Tuning Freq: %d %s\n", tuner_params.freq_hz,
1059                 demod_type == MXL_EAGLE_DEMOD_TYPE_ATSC ? "ATSC" : "QAM");
1060
1061         status = mxl692_i2c_writeread(dev,
1062                                       MXL_EAGLE_OPCODE_TUNER_CHANNEL_TUNE_SET,
1063                                       (u8 *)&tuner_params,
1064                                       sizeof(struct MXL_EAGLE_TUNER_CHANNEL_PARAMS_T),
1065                                       NULL,
1066                                       0);
1067         if (status)
1068                 goto err;
1069
1070         usleep_range(20 * 1000, 30 * 1000); /* was 500! */
1071
1072         switch (demod_type) {
1073         case MXL_EAGLE_DEMOD_TYPE_ATSC:
1074                 status = mxl692_i2c_writeread(dev,
1075                                               MXL_EAGLE_OPCODE_ATSC_INIT_SET,
1076                                               NULL, 0, NULL, 0);
1077                 if (status)
1078                         goto err;
1079                 break;
1080         case MXL_EAGLE_DEMOD_TYPE_QAM:
1081                 status = mxl692_i2c_writeread(dev,
1082                                               MXL_EAGLE_OPCODE_QAM_RESTART_SET,
1083                                               NULL, 0, NULL, 0);
1084                 if (status)
1085                         goto err;
1086                 break;
1087         default:
1088                 break;
1089         }
1090
1091         dev->demod_type = demod_type;
1092         dev->current_frequency = p->frequency;
1093
1094         return 0;
1095 err:
1096         dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
1097         return status;
1098 }
1099
1100 static int mxl692_get_frontend(struct dvb_frontend *fe,
1101                                struct dtv_frontend_properties *p)
1102 {
1103         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1104
1105         p->modulation = c->modulation;
1106         p->frequency = c->frequency;
1107
1108         return 0;
1109 }
1110
1111 static int mxl692_read_snr(struct dvb_frontend *fe, u16 *snr)
1112 {
1113         struct mxl692_dev *dev = fe->demodulator_priv;
1114         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1115         u8 rx_buf[MXL_EAGLE_MAX_I2C_PACKET_SIZE] = {};
1116         struct MXL_EAGLE_ATSC_DEMOD_STATUS_T *atsc_status;
1117         struct MXL_EAGLE_QAM_DEMOD_STATUS_T *qam_status;
1118         enum MXL_EAGLE_DEMOD_TYPE_E demod_type = dev->demod_type;
1119         int mxl_status = 0;
1120
1121         *snr = 0;
1122
1123         dev_dbg(&dev->i2c_client->dev, "\n");
1124
1125         atsc_status = (struct MXL_EAGLE_ATSC_DEMOD_STATUS_T *)&rx_buf;
1126         qam_status = (struct MXL_EAGLE_QAM_DEMOD_STATUS_T *)&rx_buf;
1127
1128         switch (demod_type) {
1129         case MXL_EAGLE_DEMOD_TYPE_ATSC:
1130                 mxl_status = mxl692_i2c_writeread(dev,
1131                                                   MXL_EAGLE_OPCODE_ATSC_STATUS_GET,
1132                                                   NULL,
1133                                                   0,
1134                                                   rx_buf,
1135                                                   sizeof(struct MXL_EAGLE_ATSC_DEMOD_STATUS_T));
1136                 if (!mxl_status) {
1137                         *snr = (u16)(atsc_status->snr_db_tenths / 10);
1138                         c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
1139                         c->cnr.stat[0].svalue = *snr;
1140                 }
1141                 break;
1142         case MXL_EAGLE_DEMOD_TYPE_QAM:
1143                 mxl_status = mxl692_i2c_writeread(dev,
1144                                                   MXL_EAGLE_OPCODE_QAM_STATUS_GET,
1145                                                   NULL,
1146                                                   0,
1147                                                   rx_buf,
1148                                                   sizeof(struct MXL_EAGLE_QAM_DEMOD_STATUS_T));
1149                 if (!mxl_status)
1150                         *snr = (u16)(qam_status->snr_db_tenths / 10);
1151                 break;
1152         case MXL_EAGLE_DEMOD_TYPE_OOB:
1153         default:
1154                 break;
1155         }
1156
1157         if (mxl_status)
1158                 dev_dbg(&dev->i2c_client->dev, "err %d\n", mxl_status);
1159         return mxl_status;
1160 }
1161
1162 static int mxl692_read_ber_ucb(struct dvb_frontend *fe)
1163 {
1164         struct mxl692_dev *dev = fe->demodulator_priv;
1165         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1166         u8 rx_buf[MXL_EAGLE_MAX_I2C_PACKET_SIZE] = {};
1167         struct MXL_EAGLE_ATSC_DEMOD_ERROR_COUNTERS_T *atsc_errors;
1168         enum MXL_EAGLE_DEMOD_TYPE_E demod_type = dev->demod_type;
1169         int mxl_status = 0;
1170         u32 utmp;
1171
1172         dev_dbg(&dev->i2c_client->dev, "\n");
1173
1174         atsc_errors = (struct MXL_EAGLE_ATSC_DEMOD_ERROR_COUNTERS_T *)&rx_buf;
1175
1176         switch (demod_type) {
1177         case MXL_EAGLE_DEMOD_TYPE_ATSC:
1178                 mxl_status = mxl692_i2c_writeread(dev,
1179                                                   MXL_EAGLE_OPCODE_ATSC_ERROR_COUNTERS_GET,
1180                                                   NULL,
1181                                                   0,
1182                                                   rx_buf,
1183                                                   sizeof(struct MXL_EAGLE_ATSC_DEMOD_ERROR_COUNTERS_T));
1184                 if (!mxl_status) {
1185                         if (atsc_errors->error_packets == 0)
1186                                 utmp = 0;
1187                         else
1188                                 utmp = ((atsc_errors->error_bytes / atsc_errors->error_packets) *
1189                                         atsc_errors->total_packets);
1190                         /* ber */
1191                         c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
1192                         c->post_bit_error.stat[0].uvalue += atsc_errors->error_bytes;
1193                         c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
1194                         c->post_bit_count.stat[0].uvalue += utmp;
1195                         /* ucb */
1196                         c->block_error.stat[0].scale = FE_SCALE_COUNTER;
1197                         c->block_error.stat[0].uvalue += atsc_errors->error_packets;
1198
1199                         dev_dbg(&dev->i2c_client->dev, "%llu   %llu\n",
1200                                 c->post_bit_count.stat[0].uvalue, c->block_error.stat[0].uvalue);
1201                 }
1202                 break;
1203         case MXL_EAGLE_DEMOD_TYPE_QAM:
1204         case MXL_EAGLE_DEMOD_TYPE_OOB:
1205         default:
1206                 break;
1207         }
1208
1209         if (mxl_status)
1210                 dev_dbg(&dev->i2c_client->dev, "err %d\n", mxl_status);
1211
1212         return mxl_status;
1213 }
1214
1215 static int mxl692_read_status(struct dvb_frontend *fe,
1216                               enum fe_status *status)
1217 {
1218         struct mxl692_dev *dev = fe->demodulator_priv;
1219         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1220         u8 rx_buf[MXL_EAGLE_MAX_I2C_PACKET_SIZE] = {};
1221         struct MXL_EAGLE_ATSC_DEMOD_STATUS_T *atsc_status;
1222         struct MXL_EAGLE_QAM_DEMOD_STATUS_T *qam_status;
1223         enum MXL_EAGLE_DEMOD_TYPE_E demod_type = dev->demod_type;
1224         int mxl_status = 0;
1225         *status = 0;
1226
1227         dev_dbg(&dev->i2c_client->dev, "\n");
1228
1229         atsc_status = (struct MXL_EAGLE_ATSC_DEMOD_STATUS_T *)&rx_buf;
1230         qam_status = (struct MXL_EAGLE_QAM_DEMOD_STATUS_T *)&rx_buf;
1231
1232         switch (demod_type) {
1233         case MXL_EAGLE_DEMOD_TYPE_ATSC:
1234                 mxl_status = mxl692_i2c_writeread(dev,
1235                                                   MXL_EAGLE_OPCODE_ATSC_STATUS_GET,
1236                                                   NULL,
1237                                                   0,
1238                                                   rx_buf,
1239                                                   sizeof(struct MXL_EAGLE_ATSC_DEMOD_STATUS_T));
1240                 if (!mxl_status && atsc_status->atsc_lock) {
1241                         *status |= FE_HAS_SIGNAL;
1242                         *status |= FE_HAS_CARRIER;
1243                         *status |= FE_HAS_VITERBI;
1244                         *status |= FE_HAS_SYNC;
1245                         *status |= FE_HAS_LOCK;
1246
1247                         c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
1248                         c->cnr.stat[0].svalue = atsc_status->snr_db_tenths / 10;
1249                 }
1250                 break;
1251         case MXL_EAGLE_DEMOD_TYPE_QAM:
1252                 mxl_status = mxl692_i2c_writeread(dev,
1253                                                   MXL_EAGLE_OPCODE_QAM_STATUS_GET,
1254                                                   NULL,
1255                                                   0,
1256                                                   rx_buf,
1257                                                   sizeof(struct MXL_EAGLE_QAM_DEMOD_STATUS_T));
1258                 if (!mxl_status && qam_status->qam_locked) {
1259                         *status |= FE_HAS_SIGNAL;
1260                         *status |= FE_HAS_CARRIER;
1261                         *status |= FE_HAS_VITERBI;
1262                         *status |= FE_HAS_SYNC;
1263                         *status |= FE_HAS_LOCK;
1264
1265                         c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
1266                         c->cnr.stat[0].svalue = qam_status->snr_db_tenths / 10;
1267                 }
1268                 break;
1269         case MXL_EAGLE_DEMOD_TYPE_OOB:
1270         default:
1271                 break;
1272         }
1273
1274         if ((*status & FE_HAS_LOCK) == 0) {
1275                 /* No lock, reset all statistics */
1276                 c->cnr.len = 1;
1277                 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1278                 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1279                 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1280                 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1281                 return 0;
1282         }
1283
1284         if (mxl_status)
1285                 dev_dbg(&dev->i2c_client->dev, "err %d\n", mxl_status);
1286         else
1287                 mxl_status = mxl692_read_ber_ucb(fe);
1288
1289         return mxl_status;
1290 }
1291
1292 static const struct dvb_frontend_ops mxl692_ops = {
1293         .delsys = { SYS_ATSC },
1294         .info = {
1295                 .name = "MaxLinear MxL692 VSB tuner-demodulator",
1296                 .frequency_min_hz      = 54000000,
1297                 .frequency_max_hz      = 858000000,
1298                 .frequency_stepsize_hz = 62500,
1299                 .caps = FE_CAN_8VSB
1300         },
1301
1302         .init         = mxl692_init,
1303         .sleep        = mxl692_sleep,
1304         .set_frontend = mxl692_set_frontend,
1305         .get_frontend = mxl692_get_frontend,
1306
1307         .read_status          = mxl692_read_status,
1308         .read_snr             = mxl692_read_snr,
1309 };
1310
1311 static int mxl692_probe(struct i2c_client *client,
1312                         const struct i2c_device_id *id)
1313 {
1314         struct mxl692_config *config = client->dev.platform_data;
1315         struct mxl692_dev *dev;
1316         int ret = 0;
1317
1318         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1319         if (!dev) {
1320                 ret = -ENOMEM;
1321                 dev_dbg(&client->dev, "kzalloc() failed\n");
1322                 goto err;
1323         }
1324
1325         memcpy(&dev->fe.ops, &mxl692_ops, sizeof(struct dvb_frontend_ops));
1326         dev->fe.demodulator_priv = dev;
1327         dev->i2c_client = client;
1328         *config->fe = &dev->fe;
1329         mutex_init(&dev->i2c_lock);
1330         i2c_set_clientdata(client, dev);
1331
1332         dev_info(&client->dev, "MaxLinear mxl692 successfully attached\n");
1333
1334         return 0;
1335 err:
1336         dev_dbg(&client->dev, "failed %d\n", ret);
1337         return -ENODEV;
1338 }
1339
1340 static int mxl692_remove(struct i2c_client *client)
1341 {
1342         struct mxl692_dev *dev = i2c_get_clientdata(client);
1343
1344         dev->fe.demodulator_priv = NULL;
1345         i2c_set_clientdata(client, NULL);
1346         kfree(dev);
1347
1348         return 0;
1349 }
1350
1351 static const struct i2c_device_id mxl692_id_table[] = {
1352         {"mxl692", 0},
1353         {}
1354 };
1355 MODULE_DEVICE_TABLE(i2c, mxl692_id_table);
1356
1357 static struct i2c_driver mxl692_driver = {
1358         .driver = {
1359                 .name   = "mxl692",
1360         },
1361         .probe          = mxl692_probe,
1362         .remove         = mxl692_remove,
1363         .id_table       = mxl692_id_table,
1364 };
1365
1366 module_i2c_driver(mxl692_driver);
1367
1368 MODULE_AUTHOR("Brad Love <brad@nextdimension.cc>");
1369 MODULE_DESCRIPTION("MaxLinear MxL692 demodulator/tuner driver");
1370 MODULE_FIRMWARE(MXL692_FIRMWARE);
1371 MODULE_LICENSE("GPL");