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  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * version 2, as published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  */
  20
  21 #include <linux/mutex.h>
  22 #include <linux/i2c-mux.h>
  23 #include <linux/string.h>
  24 #include <linux/firmware.h>
  25
  26 #include "mxl692.h"
  27 #include "mxl692_defs.h"
  28
  29 static const struct dvb_frontend_ops mxl692_ops;
  30
  31 struct mxl692_dev {
  32         struct dvb_frontend fe;
  33         struct i2c_client *i2c_client;
  34         struct mutex i2c_lock;          /* i2c command mutex */
  35         enum MXL_EAGLE_DEMOD_TYPE_E demod_type;
  36         enum MXL_EAGLE_POWER_MODE_E power_mode;
  37         u32 current_frequency;
  38         int device_type;
  39         int seqnum;
  40         int init_done;
  41 };
  42
  43 static int mxl692_i2c_write(struct mxl692_dev *dev, u8 *buffer, u16 buf_len)
  44 {
  45         int ret = 0;
  46         struct i2c_msg msg = {
  47                 .addr = dev->i2c_client->addr,
  48                 .flags = 0,
  49                 .buf = buffer,
  50                 .len = buf_len
  51         };
  52
  53         ret = i2c_transfer(dev->i2c_client->adapter, &msg, 1);
  54         if (ret != 1)
  55                 dev_dbg(&dev->i2c_client->dev, "i2c write error!\n");
  56
  57         return ret;
  58 }
  59
  60 static int mxl692_i2c_read(struct mxl692_dev *dev, u8 *buffer, u16 buf_len)
  61 {
  62         int ret = 0;
  63         struct i2c_msg msg = {
  64                 .addr = dev->i2c_client->addr,
  65                 .flags = I2C_M_RD,
  66                 .buf = buffer,
  67                 .len = buf_len
  68         };
  69
  70         ret = i2c_transfer(dev->i2c_client->adapter, &msg, 1);
  71         if (ret != 1)
  72                 dev_dbg(&dev->i2c_client->dev, "i2c read error!\n");
  73
  74         return ret;
  75 }
  76
  77 static int convert_endian(u32 size, u8 *d)
  78 {
  79         u32 i;
  80
  81         for (i = 0; i < (size & ~3); i += 4) {
  82                 d[i + 0] ^= d[i + 3];
  83                 d[i + 3] ^= d[i + 0];
  84                 d[i + 0] ^= d[i + 3];
  85
  86                 d[i + 1] ^= d[i + 2];
  87                 d[i + 2] ^= d[i + 1];
  88                 d[i + 1] ^= d[i + 2];
  89         }
  90
  91         switch (size & 3) {
  92         case 0:
  93         case 1:
  94                 /* do nothing */
  95                 break;
  96         case 2:
  97                 d[i + 0] ^= d[i + 1];
  98                 d[i + 1] ^= d[i + 0];
  99                 d[i + 0] ^= d[i + 1];
 100                 break;
 101
 102         case 3:
 103                 d[i + 0] ^= d[i + 2];
 104                 d[i + 2] ^= d[i + 0];
 105                 d[i + 0] ^= d[i + 2];
 106                 break;
 107         }
 108         return size;
 109 }
 110
 111 static int convert_endian_n(int n, u32 size, u8 *d)
 112 {
 113         int i, count = 0;
 114
 115         for (i = 0; i < n; i += size)
 116                 count += convert_endian(size, d + i);
 117         return count;
 118 }
 119
 120 static void mxl692_tx_swap(enum MXL_EAGLE_OPCODE_E opcode, u8 *buffer)
 121 {
 122 #ifdef __BIG_ENDIAN
 123         return;
 124 #endif
 125         buffer += MXL_EAGLE_HOST_MSG_HEADER_SIZE; /* skip API header */
 126
 127         switch (opcode) {
 128         case MXL_EAGLE_OPCODE_DEVICE_INTR_MASK_SET:
 129         case MXL_EAGLE_OPCODE_TUNER_CHANNEL_TUNE_SET:
 130         case MXL_EAGLE_OPCODE_SMA_TRANSMIT_SET:
 131                 buffer += convert_endian(sizeof(u32), buffer);
 132                 break;
 133         case MXL_EAGLE_OPCODE_QAM_PARAMS_SET:
 134                 buffer += 5;
 135                 buffer += convert_endian(2 * sizeof(u32), buffer);
 136                 break;
 137         default:
 138                 /* no swapping - all get opcodes */
 139                 /* ATSC/OOB no swapping */
 140                 break;
 141         }
 142 }
 143
 144 static void mxl692_rx_swap(enum MXL_EAGLE_OPCODE_E opcode, u8 *buffer)
 145 {
 146 #ifdef __BIG_ENDIAN
 147         return;
 148 #endif
 149         buffer += MXL_EAGLE_HOST_MSG_HEADER_SIZE; /* skip API header */
 150
 151         switch (opcode) {
 152         case MXL_EAGLE_OPCODE_TUNER_AGC_STATUS_GET:
 153                 buffer++;
 154                 buffer += convert_endian(2 * sizeof(u16), buffer);
 155                 break;
 156         case MXL_EAGLE_OPCODE_ATSC_STATUS_GET:
 157                 buffer += convert_endian_n(2, sizeof(u16), buffer);
 158                 buffer += convert_endian(sizeof(u32), buffer);
 159                 break;
 160         case MXL_EAGLE_OPCODE_ATSC_ERROR_COUNTERS_GET:
 161                 buffer += convert_endian(3 * sizeof(u32), buffer);
 162                 break;
 163         case MXL_EAGLE_OPCODE_ATSC_EQUALIZER_FILTER_FFE_TAPS_GET:
 164                 buffer += convert_endian_n(24, sizeof(u16), buffer);
 165                 break;
 166         case MXL_EAGLE_OPCODE_QAM_STATUS_GET:
 167                 buffer += 8;
 168                 buffer += convert_endian_n(2, sizeof(u16), buffer);
 169                 buffer += convert_endian(sizeof(u32), buffer);
 170                 break;
 171         case MXL_EAGLE_OPCODE_QAM_ERROR_COUNTERS_GET:
 172                 buffer += convert_endian(7 * sizeof(u32), buffer);
 173                 break;
 174         case MXL_EAGLE_OPCODE_QAM_CONSTELLATION_VALUE_GET:
 175         case MXL_EAGLE_OPCODE_QAM_EQUALIZER_FILTER_DFE_START_GET:
 176         case MXL_EAGLE_OPCODE_QAM_EQUALIZER_FILTER_DFE_MIDDLE_GET:
 177         case MXL_EAGLE_OPCODE_QAM_EQUALIZER_FILTER_DFE_END_GET:
 178         case MXL_EAGLE_OPCODE_QAM_EQUALIZER_FILTER_SPUR_START_GET:
 179                 buffer += convert_endian_n(24, sizeof(u16), buffer);
 180                 break;
 181         case MXL_EAGLE_OPCODE_QAM_EQUALIZER_FILTER_SPUR_END_GET:
 182                 buffer += convert_endian_n(8, sizeof(u16), buffer);
 183                 break;
 184         case MXL_EAGLE_OPCODE_QAM_EQUALIZER_FILTER_FFE_GET:
 185                 buffer += convert_endian_n(17, sizeof(u16), buffer);
 186                 break;
 187         case MXL_EAGLE_OPCODE_OOB_ERROR_COUNTERS_GET:
 188                 buffer += convert_endian(3 * sizeof(u32), buffer);
 189                 break;
 190         case MXL_EAGLE_OPCODE_OOB_STATUS_GET:
 191                 buffer += convert_endian_n(2, sizeof(u16), buffer);
 192                 buffer += convert_endian(sizeof(u32), buffer);
 193                 break;
 194         case MXL_EAGLE_OPCODE_SMA_RECEIVE_GET:
 195                 buffer += convert_endian(sizeof(u32), buffer);
 196                 break;
 197         default:
 198                 /* no swapping - all set opcodes */
 199                 break;
 200         }
 201 }
 202
 203 static u32 mxl692_checksum(u8 *buffer, u32 size)
 204 {
 205         u32 ix, div_size;
 206         u32 cur_cksum = 0;
 207         __be32 *buf;
 208
 209         div_size = DIV_ROUND_UP(size, 4);
 210
 211         buf = (__be32 *)buffer;
 212         for (ix = 0; ix < div_size; ix++)
 213                 cur_cksum += be32_to_cpu(buf[ix]);
 214
 215         cur_cksum ^= 0xDEADBEEF;
 216
 217         return cur_cksum;
 218 }
 219
 220 static int mxl692_validate_fw_header(struct mxl692_dev *dev,
 221                                      const u8 *buffer, u32 buf_len)
 222 {
 223         int status = 0;
 224         u32 ix, temp;
 225         __be32 *local_buf = NULL;
 226         u8 temp_cksum = 0;
 227         const u8 fw_hdr[] = { 0x4D, 0x31, 0x10, 0x02, 0x40, 0x00, 0x00, 0x80 };
 228
 229         if (memcmp(buffer, fw_hdr, 8) != 0) {
 230                 status = -EINVAL;
 231                 goto err_finish;
 232         }
 233
 234         local_buf = (__be32 *)(buffer + 8);
 235         temp = be32_to_cpu(*local_buf);
 236
 237         if ((buf_len - 16) != temp >> 8) {
 238                 status = -EINVAL;
 239                 goto err_finish;
 240         }
 241
 242         for (ix = 16; ix < buf_len; ix++)
 243                 temp_cksum += buffer[ix];
 244
 245         if (temp_cksum != buffer[11])
 246                 status = -EINVAL;
 247
 248 err_finish:
 249         if (status)
 250                 dev_dbg(&dev->i2c_client->dev, "failed\n");
 251         return status;
 252 }
 253
 254 static int mxl692_write_fw_block(struct mxl692_dev *dev, const u8 *buffer,
 255                                  u32 buf_len, u32 *index)
 256 {
 257         int status = 0;
 258         u32 ix = 0, total_len = 0, addr = 0, chunk_len = 0, prevchunk_len = 0;
 259         u8 local_buf[MXL_EAGLE_MAX_I2C_PACKET_SIZE] = {}, *plocal_buf = NULL;
 260         int payload_max = MXL_EAGLE_MAX_I2C_PACKET_SIZE - MXL_EAGLE_I2C_MHEADER_SIZE;
 261
 262         ix = *index;
 263
 264         if (buffer[ix] == 0x53) {
 265                 total_len = buffer[ix + 1] << 16 | buffer[ix + 2] << 8 | buffer[ix + 3];
 266                 total_len = (total_len + 3) & ~3;
 267                 addr      = buffer[ix + 4] << 24 | buffer[ix + 5] << 16 |
 268                             buffer[ix + 6] << 8 | buffer[ix + 7];
 269                 ix       += MXL_EAGLE_FW_SEGMENT_HEADER_SIZE;
 270
 271                 while ((total_len > 0) && (status == 0)) {
 272                         plocal_buf = local_buf;
 273                         chunk_len  = (total_len < payload_max) ? total_len : payload_max;
 274
 275                         *plocal_buf++ = 0xFC;
 276                         *plocal_buf++ = chunk_len + sizeof(u32);
 277
 278                         *(u32 *)plocal_buf = addr + prevchunk_len;
 279 #ifdef __BIG_ENDIAN
 280                         convert_endian(sizeof(u32), plocal_buf);
 281 #endif
 282                         plocal_buf += sizeof(u32);
 283
 284                         memcpy(plocal_buf, &buffer[ix], chunk_len);
 285                         convert_endian(chunk_len, plocal_buf);
 286                         if (mxl692_i2c_write(dev, local_buf,
 287                                              (chunk_len + MXL_EAGLE_I2C_MHEADER_SIZE)) < 0) {
 288                                 status = -EREMOTEIO;
 289                                 break;
 290                         }
 291
 292                         prevchunk_len += chunk_len;
 293                         total_len -= chunk_len;
 294                         ix += chunk_len;
 295                 }
 296                 *index = ix;
 297         } else {
 298                 status = -EINVAL;
 299         }
 300
 301         if (status)
 302                 dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 303
 304         return status;
 305 }
 306
 307 static int mxl692_memwrite(struct mxl692_dev *dev, u32 addr,
 308                            u8 *buffer, u32 size)
 309 {
 310         int status = 0, total_len = 0;
 311         u8 local_buf[MXL_EAGLE_MAX_I2C_PACKET_SIZE] = {}, *plocal_buf = NULL;
 312
 313         total_len = size;
 314         total_len = (total_len + 3) & ~3;  /* 4 byte alignment */
 315
 316         if (total_len > (MXL_EAGLE_MAX_I2C_PACKET_SIZE - MXL_EAGLE_I2C_MHEADER_SIZE))
 317                 dev_dbg(&dev->i2c_client->dev, "hrmph?\n");
 318
 319         plocal_buf = local_buf;
 320
 321         *plocal_buf++ = 0xFC;
 322         *plocal_buf++ = total_len + sizeof(u32);
 323
 324         *(u32 *)plocal_buf = addr;
 325         plocal_buf += sizeof(u32);
 326
 327         memcpy(plocal_buf, buffer, total_len);
 328 #ifdef __BIG_ENDIAN
 329         convert_endian(sizeof(u32) + total_len, local_buf + 2);
 330 #endif
 331         if (mxl692_i2c_write(dev, local_buf,
 332                              (total_len + MXL_EAGLE_I2C_MHEADER_SIZE)) < 0) {
 333                 status = -EREMOTEIO;
 334                 goto err_finish;
 335         }
 336
 337         return status;
 338 err_finish:
 339         dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 340         return status;
 341 }
 342
 343 static int mxl692_memread(struct mxl692_dev *dev, u32 addr,
 344                           u8 *buffer, u32 size)
 345 {
 346         int status = 0;
 347         u8 local_buf[MXL_EAGLE_I2C_MHEADER_SIZE] = {}, *plocal_buf = NULL;
 348
 349         plocal_buf = local_buf;
 350
 351         *plocal_buf++ = 0xFB;
 352         *plocal_buf++ = sizeof(u32);
 353         *(u32 *)plocal_buf = addr;
 354 #ifdef __BIG_ENDIAN
 355         convert_endian(sizeof(u32), plocal_buf);
 356 #endif
 357         mutex_lock(&dev->i2c_lock);
 358
 359         if (mxl692_i2c_write(dev, local_buf, MXL_EAGLE_I2C_MHEADER_SIZE) > 0) {
 360                 size = (size + 3) & ~3;  /* 4 byte alignment */
 361                 status = mxl692_i2c_read(dev, buffer, (u16)size) < 0 ? -EREMOTEIO : 0;
 362 #ifdef __BIG_ENDIAN
 363                 if (status == 0)
 364                         convert_endian(size, buffer);
 365 #endif
 366         } else {
 367                 status = -EREMOTEIO;
 368         }
 369
 370         mutex_unlock(&dev->i2c_lock);
 371
 372         if (status)
 373                 dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 374
 375         return status;
 376 }
 377
 378 static const char *mxl692_opcode_string(u8 opcode)
 379 {
 380         if (opcode >= 0 && opcode <= MXL_EAGLE_OPCODE_INTERNAL)
 381                 return MXL_EAGLE_OPCODE_STRING[opcode];
 382
 383         return "invalid opcode";
 384 }
 385
 386 static int mxl692_opwrite(struct mxl692_dev *dev, u8 *buffer,
 387                           u32 size)
 388 {
 389         int status = 0, total_len = 0;
 390         u8 local_buf[MXL_EAGLE_MAX_I2C_PACKET_SIZE] = {}, *plocal_buf = NULL;
 391         struct MXL_EAGLE_HOST_MSG_HEADER_T *tx_hdr = (struct MXL_EAGLE_HOST_MSG_HEADER_T *)buffer;
 392
 393         total_len = size;
 394         total_len = (total_len + 3) & ~3;  /* 4 byte alignment */
 395
 396         if (total_len > (MXL_EAGLE_MAX_I2C_PACKET_SIZE - MXL_EAGLE_I2C_PHEADER_SIZE))
 397                 dev_dbg(&dev->i2c_client->dev, "hrmph?\n");
 398
 399         plocal_buf = local_buf;
 400
 401         *plocal_buf++ = 0xFE;
 402         *plocal_buf++ = (u8)total_len;
 403
 404         memcpy(plocal_buf, buffer, total_len);
 405         convert_endian(total_len, plocal_buf);
 406
 407         if (mxl692_i2c_write(dev, local_buf,
 408                              (total_len + MXL_EAGLE_I2C_PHEADER_SIZE)) < 0) {
 409                 status = -EREMOTEIO;
 410                 goto err_finish;
 411         }
 412 err_finish:
 413         if (status)
 414                 dev_dbg(&dev->i2c_client->dev, "opcode %s  err %d\n",
 415                         mxl692_opcode_string(tx_hdr->opcode), status);
 416         return status;
 417 }
 418
 419 static int mxl692_opread(struct mxl692_dev *dev, u8 *buffer,
 420                          u32 size)
 421 {
 422         int status = 0;
 423         u32 ix = 0;
 424         u8 local_buf[MXL_EAGLE_I2C_PHEADER_SIZE] = {};
 425
 426         local_buf[0] = 0xFD;
 427         local_buf[1] = 0;
 428
 429         if (mxl692_i2c_write(dev, local_buf, MXL_EAGLE_I2C_PHEADER_SIZE) > 0) {
 430                 size = (size + 3) & ~3;  /* 4 byte alignment */
 431
 432                 /* Read in 4 byte chunks */
 433                 for (ix = 0; ix < size; ix += 4) {
 434                         if (mxl692_i2c_read(dev, buffer + ix, 4) < 0) {
 435                                 dev_dbg(&dev->i2c_client->dev, "ix=%d   size=%d\n", ix, size);
 436                                 status = -EREMOTEIO;
 437                                 goto err_finish;
 438                         }
 439                 }
 440                 convert_endian(size, buffer);
 441         } else {
 442                 status = -EREMOTEIO;
 443         }
 444 err_finish:
 445         if (status)
 446                 dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 447         return status;
 448 }
 449
 450 static int mxl692_i2c_writeread(struct mxl692_dev *dev,
 451                                 u8 opcode,
 452                                 u8 *tx_payload,
 453                                 u8 tx_payload_size,
 454                                 u8 *rx_payload,
 455                                 u8 rx_payload_expected)
 456 {
 457         int status = 0, timeout = 40;
 458         u8 tx_buf[MXL_EAGLE_MAX_I2C_PACKET_SIZE] = {};
 459         u8 rx_buf[MXL_EAGLE_MAX_I2C_PACKET_SIZE] = {};
 460         u32 resp_checksum = 0, resp_checksum_tmp = 0;
 461         struct MXL_EAGLE_HOST_MSG_HEADER_T *tx_header;
 462         struct MXL_EAGLE_HOST_MSG_HEADER_T *rx_header;
 463
 464         mutex_lock(&dev->i2c_lock);
 465
 466         if ((tx_payload_size + MXL_EAGLE_HOST_MSG_HEADER_SIZE) >
 467             (MXL_EAGLE_MAX_I2C_PACKET_SIZE - MXL_EAGLE_I2C_PHEADER_SIZE)) {
 468                 status = -EINVAL;
 469                 goto err_finish;
 470         }
 471
 472         tx_header = (struct MXL_EAGLE_HOST_MSG_HEADER_T *)tx_buf;
 473         tx_header->opcode = opcode;
 474         tx_header->seqnum = dev->seqnum++;
 475         tx_header->payload_size = tx_payload_size;
 476         tx_header->checksum = 0;
 477
 478         if (dev->seqnum == 0)
 479                 dev->seqnum = 1;
 480
 481         if (tx_payload && tx_payload_size > 0)
 482                 memcpy(&tx_buf[MXL_EAGLE_HOST_MSG_HEADER_SIZE], tx_payload, tx_payload_size);
 483
 484         mxl692_tx_swap(opcode, tx_buf);
 485
 486         tx_header->checksum = 0;
 487         tx_header->checksum = mxl692_checksum(tx_buf,
 488                                               MXL_EAGLE_HOST_MSG_HEADER_SIZE + tx_payload_size);
 489 #ifdef __LITTLE_ENDIAN
 490         convert_endian(4, (u8 *)&tx_header->checksum); /* cksum is big endian */
 491 #endif
 492         /* send Tx message */
 493         status = mxl692_opwrite(dev, tx_buf,
 494                                 tx_payload_size + MXL_EAGLE_HOST_MSG_HEADER_SIZE);
 495         if (status) {
 496                 status = -EREMOTEIO;
 497                 goto err_finish;
 498         }
 499
 500         /* receive Rx message (polling) */
 501         rx_header = (struct MXL_EAGLE_HOST_MSG_HEADER_T *)rx_buf;
 502
 503         do {
 504                 status = mxl692_opread(dev, rx_buf,
 505                                        rx_payload_expected + MXL_EAGLE_HOST_MSG_HEADER_SIZE);
 506                 usleep_range(1000, 2000);
 507                 timeout--;
 508         } while ((timeout > 0) && (status == 0) &&
 509                  (rx_header->seqnum == 0) &&
 510                  (rx_header->checksum == 0));
 511
 512         if (timeout == 0 || status) {
 513                 dev_dbg(&dev->i2c_client->dev, "timeout=%d   status=%d\n",
 514                         timeout, status);
 515                 status = -ETIMEDOUT;
 516                 goto err_finish;
 517         }
 518
 519         if (rx_header->status) {
 520                 dev_dbg(&dev->i2c_client->dev, "rx header status code: %d\n", rx_header->status);
 521                 status = -EREMOTEIO;
 522                 goto err_finish;
 523         }
 524
 525         if (rx_header->seqnum != tx_header->seqnum ||
 526             rx_header->opcode != tx_header->opcode ||
 527             rx_header->payload_size != rx_payload_expected) {
 528                 dev_dbg(&dev->i2c_client->dev, "Something failed seq=%s  opcode=%s  pSize=%s\n",
 529                         rx_header->seqnum != tx_header->seqnum ? "X" : "0",
 530                         rx_header->opcode != tx_header->opcode ? "X" : "0",
 531                         rx_header->payload_size != rx_payload_expected ? "X" : "0");
 532                 if (rx_header->payload_size != rx_payload_expected)
 533                         dev_dbg(&dev->i2c_client->dev,
 534                                 "rx_header->payloadSize=%d   rx_payload_expected=%d\n",
 535                                 rx_header->payload_size, rx_payload_expected);
 536                 status = -EREMOTEIO;
 537                 goto err_finish;
 538         }
 539
 540         resp_checksum = rx_header->checksum;
 541         rx_header->checksum = 0;
 542
 543         resp_checksum_tmp = mxl692_checksum(rx_buf,
 544                                             MXL_EAGLE_HOST_MSG_HEADER_SIZE + rx_header->payload_size);
 545 #ifdef __LITTLE_ENDIAN
 546         convert_endian(4, (u8 *)&resp_checksum_tmp); /* cksum is big endian */
 547 #endif
 548         if (resp_checksum != resp_checksum_tmp) {
 549                 dev_dbg(&dev->i2c_client->dev, "rx checksum failure\n");
 550                 status = -EREMOTEIO;
 551                 goto err_finish;
 552         }
 553
 554         mxl692_rx_swap(rx_header->opcode, rx_buf);
 555
 556         if (rx_header->payload_size > 0) {
 557                 if (!rx_payload) {
 558                         dev_dbg(&dev->i2c_client->dev, "no rx payload?!?\n");
 559                         status = -EREMOTEIO;
 560                         goto err_finish;
 561                 }
 562                 memcpy(rx_payload, rx_buf + MXL_EAGLE_HOST_MSG_HEADER_SIZE,
 563                        rx_header->payload_size);
 564         }
 565 err_finish:
 566         if (status)
 567                 dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 568
 569         mutex_unlock(&dev->i2c_lock);
 570         return status;
 571 }
 572
 573 static int mxl692_fwdownload(struct mxl692_dev *dev,
 574                              const u8 *firmware_buf, u32 buf_len)
 575 {
 576         int status = 0;
 577         u32 ix, reg_val = 0x1;
 578         u8 rx_buf[MXL_EAGLE_MAX_I2C_PACKET_SIZE] = {};
 579         struct MXL_EAGLE_DEV_STATUS_T *dev_status;
 580
 581         if (buf_len < MXL_EAGLE_FW_HEADER_SIZE ||
 582             buf_len > MXL_EAGLE_FW_MAX_SIZE_IN_KB * 1000)
 583                 return -EINVAL;
 584
 585         mutex_lock(&dev->i2c_lock);
 586
 587         dev_dbg(&dev->i2c_client->dev, "\n");
 588
 589         status = mxl692_validate_fw_header(dev, firmware_buf, buf_len);
 590         if (status)
 591                 goto err_finish;
 592
 593         ix = 16;
 594         status = mxl692_write_fw_block(dev, firmware_buf, buf_len, &ix); /* DRAM */
 595         if (status)
 596                 goto err_finish;
 597
 598         status = mxl692_write_fw_block(dev, firmware_buf, buf_len, &ix); /* IRAM */
 599         if (status)
 600                 goto err_finish;
 601
 602         /* release CPU from reset */
 603         status = mxl692_memwrite(dev, 0x70000018, (u8 *)&reg_val, sizeof(u32));
 604         if (status)
 605                 goto err_finish;
 606
 607         mutex_unlock(&dev->i2c_lock);
 608
 609         if (status == 0) {
 610                 /* verify FW is alive */
 611                 usleep_range(MXL_EAGLE_FW_LOAD_TIME * 1000, (MXL_EAGLE_FW_LOAD_TIME + 5) * 1000);
 612                 dev_status = (struct MXL_EAGLE_DEV_STATUS_T *)&rx_buf;
 613                 status = mxl692_i2c_writeread(dev,
 614                                               MXL_EAGLE_OPCODE_DEVICE_STATUS_GET,
 615                                               NULL,
 616                                               0,
 617                                               (u8 *)dev_status,
 618                                               sizeof(struct MXL_EAGLE_DEV_STATUS_T));
 619         }
 620
 621         return status;
 622 err_finish:
 623         mutex_unlock(&dev->i2c_lock);
 624         if (status)
 625                 dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 626         return status;
 627 }
 628
 629 static int mxl692_get_versions(struct mxl692_dev *dev)
 630 {
 631         int status = 0;
 632         struct MXL_EAGLE_DEV_VER_T dev_ver = {};
 633         static const char * const chip_id[] = {"N/A", "691", "248", "692"};
 634
 635         status = mxl692_i2c_writeread(dev, MXL_EAGLE_OPCODE_DEVICE_VERSION_GET,
 636                                       NULL,
 637                                       0,
 638                                       (u8 *)&dev_ver,
 639                                       sizeof(struct MXL_EAGLE_DEV_VER_T));
 640         if (status)
 641                 return status;
 642
 643         dev_info(&dev->i2c_client->dev, "MxL692_DEMOD Chip ID: %s\n",
 644                  chip_id[dev_ver.chip_id]);
 645
 646         dev_info(&dev->i2c_client->dev,
 647                  "MxL692_DEMOD FW Version: %d.%d.%d.%d_RC%d\n",
 648                  dev_ver.firmware_ver[0],
 649                  dev_ver.firmware_ver[1],
 650                  dev_ver.firmware_ver[2],
 651                  dev_ver.firmware_ver[3],
 652                  dev_ver.firmware_ver[4]);
 653
 654         return status;
 655 }
 656
 657 static int mxl692_reset(struct mxl692_dev *dev)
 658 {
 659         int status = 0;
 660         u32 dev_type = MXL_EAGLE_DEVICE_MAX, reg_val = 0x2;
 661
 662         dev_dbg(&dev->i2c_client->dev, "\n");
 663
 664         /* legacy i2c override */
 665         status = mxl692_memwrite(dev, 0x80000100, (u8 *)&reg_val, sizeof(u32));
 666         if (status)
 667                 goto err_finish;
 668
 669         /* verify sku */
 670         status = mxl692_memread(dev, 0x70000188, (u8 *)&dev_type, sizeof(u32));
 671         if (status)
 672                 goto err_finish;
 673
 674         if (dev_type != dev->device_type)
 675                 goto err_finish;
 676
 677 err_finish:
 678         if (status)
 679                 dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 680         return status;
 681 }
 682
 683 static int mxl692_config_regulators(struct mxl692_dev *dev,
 684                                     enum MXL_EAGLE_POWER_SUPPLY_SOURCE_E power_supply)
 685 {
 686         int status = 0;
 687         u32 reg_val;
 688
 689         dev_dbg(&dev->i2c_client->dev, "\n");
 690
 691         /* configure main regulator according to the power supply source */
 692         status = mxl692_memread(dev, 0x90000000, (u8 *)&reg_val, sizeof(u32));
 693         if (status)
 694                 goto err_finish;
 695
 696         reg_val &= 0x00FFFFFF;
 697         reg_val |= (power_supply == MXL_EAGLE_POWER_SUPPLY_SOURCE_SINGLE) ?
 698                                         0x14000000 : 0x10000000;
 699
 700         status = mxl692_memwrite(dev, 0x90000000, (u8 *)&reg_val, sizeof(u32));
 701         if (status)
 702                 goto err_finish;
 703
 704         /* configure digital regulator to high current mode */
 705         status = mxl692_memread(dev, 0x90000018, (u8 *)&reg_val, sizeof(u32));
 706         if (status)
 707                 goto err_finish;
 708
 709         reg_val |= 0x800;
 710
 711         status = mxl692_memwrite(dev, 0x90000018, (u8 *)&reg_val, sizeof(u32));
 712
 713 err_finish:
 714         if (status)
 715                 dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 716         return status;
 717 }
 718
 719 static int mxl692_config_xtal(struct mxl692_dev *dev,
 720                               struct MXL_EAGLE_DEV_XTAL_T *dev_xtal)
 721 {
 722         int status = 0;
 723         u32 reg_val, reg_val1;
 724
 725         dev_dbg(&dev->i2c_client->dev, "\n");
 726
 727         status = mxl692_memread(dev, 0x90000000, (u8 *)&reg_val, sizeof(u32));
 728         if (status)
 729                 goto err_finish;
 730
 731         /* set XTAL capacitance */
 732         reg_val &= 0xFFFFFFE0;
 733         reg_val |= dev_xtal->xtal_cap;
 734
 735         /* set CLK OUT */
 736         reg_val = dev_xtal->clk_out_enable ? (reg_val | 0x0100) : (reg_val & 0xFFFFFEFF);
 737
 738         status = mxl692_memwrite(dev, 0x90000000, (u8 *)&reg_val, sizeof(u32));
 739         if (status)
 740                 goto err_finish;
 741
 742         /* set CLK OUT divider */
 743         reg_val = dev_xtal->clk_out_div_enable ? (reg_val | 0x0200) : (reg_val & 0xFFFFFDFF);
 744
 745         status = mxl692_memwrite(dev, 0x90000000, (u8 *)&reg_val, sizeof(u32));
 746         if (status)
 747                 goto err_finish;
 748
 749         /* set XTAL sharing */
 750         reg_val = dev_xtal->xtal_sharing_enable ? (reg_val | 0x010400) : (reg_val & 0xFFFEFBFF);
 751
 752         status = mxl692_memwrite(dev, 0x90000000, (u8 *)&reg_val, sizeof(u32));
 753         if (status)
 754                 goto err_finish;
 755
 756         /* enable/disable XTAL calibration, based on master/slave device */
 757         status = mxl692_memread(dev, 0x90000030, (u8 *)&reg_val1, sizeof(u32));
 758         if (status)
 759                 goto err_finish;
 760
 761         if (dev_xtal->xtal_calibration_enable) {
 762                 /* enable XTAL calibration and set XTAL amplitude to a higher value */
 763                 reg_val1 &= 0xFFFFFFFD;
 764                 reg_val1 |= 0x30;
 765
 766                 status = mxl692_memwrite(dev, 0x90000030, (u8 *)&reg_val1, sizeof(u32));
 767                 if (status)
 768                         goto err_finish;
 769         } else {
 770                 /* disable XTAL calibration */
 771                 reg_val1 |= 0x2;
 772
 773                 status = mxl692_memwrite(dev, 0x90000030, (u8 *)&reg_val1, sizeof(u32));
 774                 if (status)
 775                         goto err_finish;
 776
 777                 /* set XTAL bias value */
 778                 status = mxl692_memread(dev, 0x9000002c, (u8 *)&reg_val, sizeof(u32));
 779                 if (status)
 780                         goto err_finish;
 781
 782                 reg_val &= 0xC0FFFFFF;
 783                 reg_val |= 0xA000000;
 784
 785                 status = mxl692_memwrite(dev, 0x9000002c, (u8 *)&reg_val, sizeof(u32));
 786                 if (status)
 787                         goto err_finish;
 788         }
 789
 790         /* start XTAL calibration */
 791         status = mxl692_memread(dev, 0x70000010, (u8 *)&reg_val, sizeof(u32));
 792         if (status)
 793                 goto err_finish;
 794
 795         reg_val |= 0x8;
 796
 797         status = mxl692_memwrite(dev, 0x70000010, (u8 *)&reg_val, sizeof(u32));
 798         if (status)
 799                 goto err_finish;
 800
 801         status = mxl692_memread(dev, 0x70000018, (u8 *)&reg_val, sizeof(u32));
 802         if (status)
 803                 goto err_finish;
 804
 805         reg_val |= 0x10;
 806
 807         status = mxl692_memwrite(dev, 0x70000018, (u8 *)&reg_val, sizeof(u32));
 808         if (status)
 809                 goto err_finish;
 810
 811         status = mxl692_memread(dev, 0x9001014c, (u8 *)&reg_val, sizeof(u32));
 812         if (status)
 813                 goto err_finish;
 814
 815         reg_val &= 0xFFFFEFFF;
 816
 817         status = mxl692_memwrite(dev, 0x9001014c, (u8 *)&reg_val, sizeof(u32));
 818         if (status)
 819                 goto err_finish;
 820
 821         reg_val |= 0x1000;
 822
 823         status = mxl692_memwrite(dev, 0x9001014c, (u8 *)&reg_val, sizeof(u32));
 824         if (status)
 825                 goto err_finish;
 826
 827         usleep_range(45000, 55000);
 828
 829 err_finish:
 830         if (status)
 831                 dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 832         return status;
 833 }
 834
 835 static int mxl692_powermode(struct mxl692_dev *dev,
 836                             enum MXL_EAGLE_POWER_MODE_E power_mode)
 837 {
 838         int status = 0;
 839         u8 mode = power_mode;
 840
 841         dev_dbg(&dev->i2c_client->dev, "%s\n",
 842                 power_mode == MXL_EAGLE_POWER_MODE_SLEEP ? "sleep" : "active");
 843
 844         status = mxl692_i2c_writeread(dev,
 845                                       MXL_EAGLE_OPCODE_DEVICE_POWERMODE_SET,
 846                                       &mode,
 847                                       sizeof(u8),
 848                                       NULL,
 849                                       0);
 850         if (status) {
 851                 dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 852                 return status;
 853         }
 854
 855         dev->power_mode = power_mode;
 856
 857         return status;
 858 }
 859
 860 static int mxl692_init(struct dvb_frontend *fe)
 861 {
 862         struct mxl692_dev *dev = fe->demodulator_priv;
 863         struct i2c_client *client = dev->i2c_client;
 864         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 865         int status = 0;
 866         const struct firmware *firmware;
 867         struct MXL_EAGLE_DEV_XTAL_T xtal_config = {};
 868
 869         dev_dbg(&dev->i2c_client->dev, "\n");
 870
 871         if (dev->init_done)
 872                 goto warm;
 873
 874         dev->seqnum = 1;
 875
 876         status = mxl692_reset(dev);
 877         if (status)
 878                 goto err;
 879
 880         usleep_range(50 * 1000, 60 * 1000); /* was 1000! */
 881
 882         status = mxl692_config_regulators(dev, MXL_EAGLE_POWER_SUPPLY_SOURCE_DUAL);
 883         if (status)
 884                 goto err;
 885
 886         xtal_config.xtal_cap = 26;
 887         xtal_config.clk_out_div_enable = 0;
 888         xtal_config.clk_out_enable = 0;
 889         xtal_config.xtal_calibration_enable = 0;
 890         xtal_config.xtal_sharing_enable = 1;
 891         status = mxl692_config_xtal(dev, &xtal_config);
 892         if (status)
 893                 goto err;
 894
 895         status = request_firmware(&firmware, MXL692_FIRMWARE, &client->dev);
 896         if (status) {
 897                 dev_dbg(&dev->i2c_client->dev, "firmware missing? %s\n",
 898                         MXL692_FIRMWARE);
 899                 goto err;
 900         }
 901
 902         status = mxl692_fwdownload(dev, firmware->data, firmware->size);
 903         if (status)
 904                 goto err_release_firmware;
 905
 906         release_firmware(firmware);
 907
 908         status = mxl692_get_versions(dev);
 909         if (status)
 910                 goto err;
 911
 912         dev->power_mode = MXL_EAGLE_POWER_MODE_SLEEP;
 913 warm:
 914         /* Config Device Power Mode */
 915         if (dev->power_mode != MXL_EAGLE_POWER_MODE_ACTIVE) {
 916                 status = mxl692_powermode(dev, MXL_EAGLE_POWER_MODE_ACTIVE);
 917                 if (status)
 918                         goto err;
 919
 920                 usleep_range(50 * 1000, 60 * 1000); /* was 500! */
 921         }
 922
 923         /* Init stats here to indicate which stats are supported */
 924         c->cnr.len = 1;
 925         c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 926         c->post_bit_error.len = 1;
 927         c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 928         c->post_bit_count.len = 1;
 929         c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 930         c->block_error.len = 1;
 931         c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 932
 933         dev->init_done = 1;
 934         return 0;
 935 err_release_firmware:
 936         release_firmware(firmware);
 937 err:
 938         dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
 939         return status;
 940 }
 941
 942 static int mxl692_sleep(struct dvb_frontend *fe)
 943 {
 944         struct mxl692_dev *dev = fe->demodulator_priv;
 945
 946         if (dev->power_mode != MXL_EAGLE_POWER_MODE_SLEEP)
 947                 mxl692_powermode(dev, MXL_EAGLE_POWER_MODE_SLEEP);
 948
 949         return 0;
 950 }
 951
 952 static int mxl692_set_frontend(struct dvb_frontend *fe)
 953 {
 954         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 955         struct mxl692_dev *dev = fe->demodulator_priv;
 956
 957         int status = 0;
 958         enum MXL_EAGLE_DEMOD_TYPE_E demod_type;
 959         struct MXL_EAGLE_MPEGOUT_PARAMS_T mpeg_params = {};
 960         enum MXL_EAGLE_QAM_DEMOD_ANNEX_TYPE_E qam_annex = MXL_EAGLE_QAM_DEMOD_ANNEX_B;
 961         struct MXL_EAGLE_QAM_DEMOD_PARAMS_T qam_params = {};
 962         struct MXL_EAGLE_TUNER_CHANNEL_PARAMS_T tuner_params = {};
 963         u8 op_param = 0;
 964
 965         dev_dbg(&dev->i2c_client->dev, "\n");
 966
 967         switch (p->modulation) {
 968         case VSB_8:
 969                 demod_type = MXL_EAGLE_DEMOD_TYPE_ATSC;
 970                 break;
 971         case QAM_AUTO:
 972         case QAM_64:
 973         case QAM_128:
 974         case QAM_256:
 975                 demod_type = MXL_EAGLE_DEMOD_TYPE_QAM;
 976                 break;
 977         default:
 978                 return -EINVAL;
 979         }
 980
 981         if (dev->current_frequency == p->frequency && dev->demod_type == demod_type) {
 982                 dev_dbg(&dev->i2c_client->dev, "already set up\n");
 983                 return 0;
 984         }
 985
 986         dev->current_frequency = -1;
 987         dev->demod_type = -1;
 988
 989         op_param = demod_type;
 990         status = mxl692_i2c_writeread(dev,
 991                                       MXL_EAGLE_OPCODE_DEVICE_DEMODULATOR_TYPE_SET,
 992                                       &op_param,
 993                                       sizeof(u8),
 994                                       NULL,
 995                                       0);
 996         if (status) {
 997                 dev_dbg(&dev->i2c_client->dev,
 998                         "DEVICE_DEMODULATOR_TYPE_SET...FAIL  err 0x%x\n", status);
 999                 goto err;
1000         }
1001
1002         usleep_range(20 * 1000, 30 * 1000); /* was 500! */
1003
1004         mpeg_params.mpeg_parallel = 0;
1005         mpeg_params.msb_first = MXL_EAGLE_DATA_SERIAL_MSB_1ST;
1006         mpeg_params.mpeg_sync_pulse_width = MXL_EAGLE_DATA_SYNC_WIDTH_BIT;
1007         mpeg_params.mpeg_valid_pol = MXL_EAGLE_CLOCK_POSITIVE;
1008         mpeg_params.mpeg_sync_pol = MXL_EAGLE_CLOCK_POSITIVE;
1009         mpeg_params.mpeg_clk_pol = MXL_EAGLE_CLOCK_NEGATIVE;
1010         mpeg_params.mpeg3wire_mode_enable = 0;
1011         mpeg_params.mpeg_clk_freq = MXL_EAGLE_MPEG_CLOCK_27MHZ;
1012
1013         switch (demod_type) {
1014         case MXL_EAGLE_DEMOD_TYPE_ATSC:
1015                 status = mxl692_i2c_writeread(dev,
1016                                               MXL_EAGLE_OPCODE_DEVICE_MPEG_OUT_PARAMS_SET,
1017                                               (u8 *)&mpeg_params,
1018                                               sizeof(struct MXL_EAGLE_MPEGOUT_PARAMS_T),
1019                                               NULL,
1020                                               0);
1021                 if (status)
1022                         goto err;
1023                 break;
1024         case MXL_EAGLE_DEMOD_TYPE_QAM:
1025                 if (qam_annex == MXL_EAGLE_QAM_DEMOD_ANNEX_A)
1026                         mpeg_params.msb_first = MXL_EAGLE_DATA_SERIAL_LSB_1ST;
1027                 status = mxl692_i2c_writeread(dev,
1028                                               MXL_EAGLE_OPCODE_DEVICE_MPEG_OUT_PARAMS_SET,
1029                                               (u8 *)&mpeg_params,
1030                                               sizeof(struct MXL_EAGLE_MPEGOUT_PARAMS_T),
1031                                               NULL,
1032                                               0);
1033                 if (status)
1034                         goto err;
1035
1036                 qam_params.annex_type = qam_annex;
1037                 qam_params.qam_type = MXL_EAGLE_QAM_DEMOD_AUTO;
1038                 qam_params.iq_flip = MXL_EAGLE_DEMOD_IQ_AUTO;
1039                 if (p->modulation == QAM_64)
1040                         qam_params.symbol_rate_hz = 5057000;
1041                 else
1042                         qam_params.symbol_rate_hz = 5361000;
1043
1044                 qam_params.symbol_rate_256qam_hz = 5361000;
1045
1046                 status = mxl692_i2c_writeread(dev,
1047                                               MXL_EAGLE_OPCODE_QAM_PARAMS_SET,
1048                                               (u8 *)&qam_params,
1049                                               sizeof(struct MXL_EAGLE_QAM_DEMOD_PARAMS_T),
1050                                               NULL, 0);
1051                 if (status)
1052                         goto err;
1053
1054                 break;
1055         default:
1056                 break;
1057         }
1058
1059         usleep_range(20 * 1000, 30 * 1000); /* was 500! */
1060
1061         tuner_params.freq_hz = p->frequency;
1062         tuner_params.bandwidth = MXL_EAGLE_TUNER_BW_6MHZ;
1063         tuner_params.tune_mode = MXL_EAGLE_TUNER_CHANNEL_TUNE_MODE_VIEW;
1064
1065         dev_dbg(&dev->i2c_client->dev, " Tuning Freq: %d %s\n", tuner_params.freq_hz,
1066                 demod_type == MXL_EAGLE_DEMOD_TYPE_ATSC ? "ATSC" : "QAM");
1067
1068         status = mxl692_i2c_writeread(dev,
1069                                       MXL_EAGLE_OPCODE_TUNER_CHANNEL_TUNE_SET,
1070                                       (u8 *)&tuner_params,
1071                                       sizeof(struct MXL_EAGLE_TUNER_CHANNEL_PARAMS_T),
1072                                       NULL,
1073                                       0);
1074         if (status)
1075                 goto err;
1076
1077         usleep_range(20 * 1000, 30 * 1000); /* was 500! */
1078
1079         switch (demod_type) {
1080         case MXL_EAGLE_DEMOD_TYPE_ATSC:
1081                 status = mxl692_i2c_writeread(dev,
1082                                               MXL_EAGLE_OPCODE_ATSC_INIT_SET,
1083                                               NULL, 0, NULL, 0);
1084                 if (status)
1085                         goto err;
1086                 break;
1087         case MXL_EAGLE_DEMOD_TYPE_QAM:
1088                 status = mxl692_i2c_writeread(dev,
1089                                               MXL_EAGLE_OPCODE_QAM_RESTART_SET,
1090                                               NULL, 0, NULL, 0);
1091                 if (status)
1092                         goto err;
1093                 break;
1094         default:
1095                 break;
1096         }
1097
1098         dev->demod_type = demod_type;
1099         dev->current_frequency = p->frequency;
1100
1101         return 0;
1102 err:
1103         dev_dbg(&dev->i2c_client->dev, "err %d\n", status);
1104         return status;
1105 }
1106
1107 static int mxl692_get_frontend(struct dvb_frontend *fe,
1108                                struct dtv_frontend_properties *p)
1109 {
1110         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1111
1112         p->modulation = c->modulation;
1113         p->frequency = c->frequency;
1114
1115         return 0;
1116 }
1117
1118 static int mxl692_read_snr(struct dvb_frontend *fe, u16 *snr)
1119 {
1120         struct mxl692_dev *dev = fe->demodulator_priv;
1121         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1122         u8 rx_buf[MXL_EAGLE_MAX_I2C_PACKET_SIZE] = {};
1123         struct MXL_EAGLE_ATSC_DEMOD_STATUS_T *atsc_status;
1124         struct MXL_EAGLE_QAM_DEMOD_STATUS_T *qam_status;
1125         enum MXL_EAGLE_DEMOD_TYPE_E demod_type = dev->demod_type;
1126         int mxl_status = 0;
1127
1128         *snr = 0;
1129
1130         dev_dbg(&dev->i2c_client->dev, "\n");
1131
1132         atsc_status = (struct MXL_EAGLE_ATSC_DEMOD_STATUS_T *)&rx_buf;
1133         qam_status = (struct MXL_EAGLE_QAM_DEMOD_STATUS_T *)&rx_buf;
1134
1135         switch (demod_type) {
1136         case MXL_EAGLE_DEMOD_TYPE_ATSC:
1137                 mxl_status = mxl692_i2c_writeread(dev,
1138                                                   MXL_EAGLE_OPCODE_ATSC_STATUS_GET,
1139                                                   NULL,
1140                                                   0,
1141                                                   rx_buf,
1142                                                   sizeof(struct MXL_EAGLE_ATSC_DEMOD_STATUS_T));
1143                 if (!mxl_status) {
1144                         *snr = (u16)(atsc_status->snr_db_tenths / 10);
1145                         c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
1146                         c->cnr.stat[0].svalue = *snr;
1147                 }
1148                 break;
1149         case MXL_EAGLE_DEMOD_TYPE_QAM:
1150                 mxl_status = mxl692_i2c_writeread(dev,
1151                                                   MXL_EAGLE_OPCODE_QAM_STATUS_GET,
1152                                                   NULL,
1153                                                   0,
1154                                                   rx_buf,
1155                                                   sizeof(struct MXL_EAGLE_QAM_DEMOD_STATUS_T));
1156                 if (!mxl_status)
1157                         *snr = (u16)(qam_status->snr_db_tenths / 10);
1158                 break;
1159         case MXL_EAGLE_DEMOD_TYPE_OOB:
1160         default:
1161                 break;
1162         }
1163
1164         if (mxl_status)
1165                 dev_dbg(&dev->i2c_client->dev, "err %d\n", mxl_status);
1166         return mxl_status;
1167 }
1168
1169 static int mxl692_read_ber_ucb(struct dvb_frontend *fe)
1170 {
1171         struct mxl692_dev *dev = fe->demodulator_priv;
1172         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1173         u8 rx_buf[MXL_EAGLE_MAX_I2C_PACKET_SIZE] = {};
1174         struct MXL_EAGLE_ATSC_DEMOD_ERROR_COUNTERS_T *atsc_errors;
1175         enum MXL_EAGLE_DEMOD_TYPE_E demod_type = dev->demod_type;
1176         int mxl_status = 0;
1177         u32 utmp;
1178
1179         dev_dbg(&dev->i2c_client->dev, "\n");
1180
1181         atsc_errors = (struct MXL_EAGLE_ATSC_DEMOD_ERROR_COUNTERS_T *)&rx_buf;
1182
1183         switch (demod_type) {
1184         case MXL_EAGLE_DEMOD_TYPE_ATSC:
1185                 mxl_status = mxl692_i2c_writeread(dev,
1186                                                   MXL_EAGLE_OPCODE_ATSC_ERROR_COUNTERS_GET,
1187                                                   NULL,
1188                                                   0,
1189                                                   rx_buf,
1190                                                   sizeof(struct MXL_EAGLE_ATSC_DEMOD_ERROR_COUNTERS_T));
1191                 if (!mxl_status) {
1192                         if (atsc_errors->error_packets == 0)
1193                                 utmp = 0;
1194                         else
1195                                 utmp = ((atsc_errors->error_bytes / atsc_errors->error_packets) *
1196                                         atsc_errors->total_packets);
1197                         /* ber */
1198                         c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
1199                         c->post_bit_error.stat[0].uvalue += atsc_errors->error_bytes;
1200                         c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
1201                         c->post_bit_count.stat[0].uvalue += utmp;
1202                         /* ucb */
1203                         c->block_error.stat[0].scale = FE_SCALE_COUNTER;
1204                         c->block_error.stat[0].uvalue += atsc_errors->error_packets;
1205
1206                         dev_dbg(&dev->i2c_client->dev, "%llu   %llu\n",
1207                                 c->post_bit_count.stat[0].uvalue, c->block_error.stat[0].uvalue);
1208                 }
1209                 break;
1210         case MXL_EAGLE_DEMOD_TYPE_QAM:
1211         case MXL_EAGLE_DEMOD_TYPE_OOB:
1212         default:
1213                 break;
1214         }
1215
1216         if (mxl_status)
1217                 dev_dbg(&dev->i2c_client->dev, "err %d\n", mxl_status);
1218
1219         return mxl_status;
1220 }
1221
1222 static int mxl692_read_status(struct dvb_frontend *fe,
1223                               enum fe_status *status)
1224 {
1225         struct mxl692_dev *dev = fe->demodulator_priv;
1226         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1227         u8 rx_buf[MXL_EAGLE_MAX_I2C_PACKET_SIZE] = {};
1228         struct MXL_EAGLE_ATSC_DEMOD_STATUS_T *atsc_status;
1229         struct MXL_EAGLE_QAM_DEMOD_STATUS_T *qam_status;
1230         enum MXL_EAGLE_DEMOD_TYPE_E demod_type = dev->demod_type;
1231         int mxl_status = 0;
1232         *status = 0;
1233
1234         dev_dbg(&dev->i2c_client->dev, "\n");
1235
1236         atsc_status = (struct MXL_EAGLE_ATSC_DEMOD_STATUS_T *)&rx_buf;
1237         qam_status = (struct MXL_EAGLE_QAM_DEMOD_STATUS_T *)&rx_buf;
1238
1239         switch (demod_type) {
1240         case MXL_EAGLE_DEMOD_TYPE_ATSC:
1241                 mxl_status = mxl692_i2c_writeread(dev,
1242                                                   MXL_EAGLE_OPCODE_ATSC_STATUS_GET,
1243                                                   NULL,
1244                                                   0,
1245                                                   rx_buf,
1246                                                   sizeof(struct MXL_EAGLE_ATSC_DEMOD_STATUS_T));
1247                 if (!mxl_status && atsc_status->atsc_lock) {
1248                         *status |= FE_HAS_SIGNAL;
1249                         *status |= FE_HAS_CARRIER;
1250                         *status |= FE_HAS_VITERBI;
1251                         *status |= FE_HAS_SYNC;
1252                         *status |= FE_HAS_LOCK;
1253
1254                         c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
1255                         c->cnr.stat[0].svalue = atsc_status->snr_db_tenths / 10;
1256                 }
1257                 break;
1258         case MXL_EAGLE_DEMOD_TYPE_QAM:
1259                 mxl_status = mxl692_i2c_writeread(dev,
1260                                                   MXL_EAGLE_OPCODE_QAM_STATUS_GET,
1261                                                   NULL,
1262                                                   0,
1263                                                   rx_buf,
1264                                                   sizeof(struct MXL_EAGLE_QAM_DEMOD_STATUS_T));
1265                 if (!mxl_status && qam_status->qam_locked) {
1266                         *status |= FE_HAS_SIGNAL;
1267                         *status |= FE_HAS_CARRIER;
1268                         *status |= FE_HAS_VITERBI;
1269                         *status |= FE_HAS_SYNC;
1270                         *status |= FE_HAS_LOCK;
1271
1272                         c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
1273                         c->cnr.stat[0].svalue = qam_status->snr_db_tenths / 10;
1274                 }
1275                 break;
1276         case MXL_EAGLE_DEMOD_TYPE_OOB:
1277         default:
1278                 break;
1279         }
1280
1281         if ((*status & FE_HAS_LOCK) == 0) {
1282                 /* No lock, reset all statistics */
1283                 c->cnr.len = 1;
1284                 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1285                 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1286                 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1287                 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1288                 return 0;
1289         }
1290
1291         if (mxl_status)
1292                 dev_dbg(&dev->i2c_client->dev, "err %d\n", mxl_status);
1293         else
1294                 mxl_status = mxl692_read_ber_ucb(fe);
1295
1296         return mxl_status;
1297 }
1298
1299 static const struct dvb_frontend_ops mxl692_ops = {
1300         .delsys = { SYS_ATSC },
1301         .info = {
1302                 .name = "MaxLinear MxL692 VSB tuner-demodulator",
1303                 .frequency_min_hz      = 54000000,
1304                 .frequency_max_hz      = 858000000,
1305                 .frequency_stepsize_hz = 62500,
1306                 .caps = FE_CAN_8VSB
1307         },
1308
1309         .init         = mxl692_init,
1310         .sleep        = mxl692_sleep,
1311         .set_frontend = mxl692_set_frontend,
1312         .get_frontend = mxl692_get_frontend,
1313
1314         .read_status          = mxl692_read_status,
1315         .read_snr             = mxl692_read_snr,
1316 };
1317
1318 static int mxl692_probe(struct i2c_client *client,
1319                         const struct i2c_device_id *id)
1320 {
1321         struct mxl692_config *config = client->dev.platform_data;
1322         struct mxl692_dev *dev;
1323         int ret = 0;
1324
1325         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1326         if (!dev) {
1327                 ret = -ENOMEM;
1328                 dev_dbg(&client->dev, "kzalloc() failed\n");
1329                 goto err;
1330         }
1331
1332         memcpy(&dev->fe.ops, &mxl692_ops, sizeof(struct dvb_frontend_ops));
1333         dev->fe.demodulator_priv = dev;
1334         dev->i2c_client = client;
1335         *config->fe = &dev->fe;
1336         mutex_init(&dev->i2c_lock);
1337         i2c_set_clientdata(client, dev);
1338
1339         dev_info(&client->dev, "MaxLinear mxl692 successfully attached\n");
1340
1341         return 0;
1342 err:
1343         dev_dbg(&client->dev, "failed %d\n", ret);
1344         return -ENODEV;
1345 }
1346
1347 static int mxl692_remove(struct i2c_client *client)
1348 {
1349         struct mxl692_dev *dev = i2c_get_clientdata(client);
1350
1351         dev->fe.demodulator_priv = NULL;
1352         i2c_set_clientdata(client, NULL);
1353         kfree(dev);
1354
1355         return 0;
1356 }
1357
1358 static const struct i2c_device_id mxl692_id_table[] = {
1359         {"mxl692", 0},
1360         {}
1361 };
1362 MODULE_DEVICE_TABLE(i2c, mxl692_id_table);
1363
1364 static struct i2c_driver mxl692_driver = {
1365         .driver = {
1366                 .name   = "mxl692",
1367         },
1368         .probe          = mxl692_probe,
1369         .remove         = mxl692_remove,
1370         .id_table       = mxl692_id_table,
1371 };
1372
1373 module_i2c_driver(mxl692_driver);
1374
1375 MODULE_AUTHOR("Brad Love <brad@nextdimension.cc>");
1376 MODULE_DESCRIPTION("MaxLinear MxL692 demodulator/tuner driver");
1377 MODULE_FIRMWARE(MXL692_FIRMWARE);
1378 MODULE_LICENSE("GPL");