drivers/media/tuners/tuner-xc2028.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
xc2028_get_reg
dump_firm_type_and_int_freq
parse_audio_std_option
check_device_status
free_firmware
load_all_firmwares
seek_firmware
do_tuner_callback
load_firmware
load_scode
check_firmware
xc2028_signal
xc2028_get_afc
generic_set_freq
xc2028_set_analog_freq
xc2028_set_params
xc2028_sleep
xc2028_dvb_release
xc2028_get_frequency
load_firmware_cb
xc2028_set_config
xc2028_attach
   1 // SPDX-License-Identifier: GPL-2.0
   2 // tuner-xc2028
   3 //
   4 // Copyright (c) 2007-2008 Mauro Carvalho Chehab <mchehab@kernel.org>
   5 //
   6 // Copyright (c) 2007 Michel Ludwig (michel.ludwig@gmail.com)
   7 //       - frontend interface
   8 
   9 #include <linux/i2c.h>
  10 #include <asm/div64.h>
  11 #include <linux/firmware.h>
  12 #include <linux/videodev2.h>
  13 #include <linux/delay.h>
  14 #include <media/tuner.h>
  15 #include <linux/mutex.h>
  16 #include <linux/slab.h>
  17 #include <asm/unaligned.h>
  18 #include "tuner-i2c.h"
  19 #include "tuner-xc2028.h"
  20 #include "tuner-xc2028-types.h"
  21 
  22 #include <linux/dvb/frontend.h>
  23 #include <media/dvb_frontend.h>
  24 
  25 /* Max transfer size done by I2C transfer functions */
  26 #define MAX_XFER_SIZE  80
  27 
  28 /* Registers (Write-only) */
  29 #define XREG_INIT         0x00
  30 #define XREG_RF_FREQ      0x02
  31 #define XREG_POWER_DOWN   0x08
  32 
  33 /* Registers (Read-only) */
  34 #define XREG_FREQ_ERROR   0x01
  35 #define XREG_LOCK         0x02
  36 #define XREG_VERSION      0x04
  37 #define XREG_PRODUCT_ID   0x08
  38 #define XREG_HSYNC_FREQ   0x10
  39 #define XREG_FRAME_LINES  0x20
  40 #define XREG_SNR          0x40
  41 
  42 #define XREG_ADC_ENV      0x0100
  43 
  44 static int debug;
  45 module_param(debug, int, 0644);
  46 MODULE_PARM_DESC(debug, "enable verbose debug messages");
  47 
  48 static int no_poweroff;
  49 module_param(no_poweroff, int, 0644);
  50 MODULE_PARM_DESC(no_poweroff, "0 (default) powers device off when not used.\n"
  51         "1 keep device energized and with tuner ready all the times.\n"
  52         "  Faster, but consumes more power and keeps the device hotter\n");
  53 
  54 static char audio_std[8];
  55 module_param_string(audio_std, audio_std, sizeof(audio_std), 0);
  56 MODULE_PARM_DESC(audio_std,
  57         "Audio standard. XC3028 audio decoder explicitly needs to know what audio\n"
  58         "standard is needed for some video standards with audio A2 or NICAM.\n"
  59         "The valid values are:\n"
  60         "A2\n"
  61         "A2/A\n"
  62         "A2/B\n"
  63         "NICAM\n"
  64         "NICAM/A\n"
  65         "NICAM/B\n");
  66 
  67 static char firmware_name[30];
  68 module_param_string(firmware_name, firmware_name, sizeof(firmware_name), 0);
  69 MODULE_PARM_DESC(firmware_name,
  70                  "Firmware file name. Allows overriding the default firmware name\n");
  71 
  72 static LIST_HEAD(hybrid_tuner_instance_list);
  73 static DEFINE_MUTEX(xc2028_list_mutex);
  74 
  75 /* struct for storing firmware table */
  76 struct firmware_description {
  77         unsigned int  type;
  78         v4l2_std_id   id;
  79         __u16         int_freq;
  80         unsigned char *ptr;
  81         unsigned int  size;
  82 };
  83 
  84 struct firmware_properties {
  85         unsigned int    type;
  86         v4l2_std_id     id;
  87         v4l2_std_id     std_req;
  88         __u16           int_freq;
  89         unsigned int    scode_table;
  90         int             scode_nr;
  91 };
  92 
  93 enum xc2028_state {
  94         XC2028_NO_FIRMWARE = 0,
  95         XC2028_WAITING_FIRMWARE,
  96         XC2028_ACTIVE,
  97         XC2028_SLEEP,
  98         XC2028_NODEV,
  99 };
 100 
 101 struct xc2028_data {
 102         struct list_head        hybrid_tuner_instance_list;
 103         struct tuner_i2c_props  i2c_props;
 104         __u32                   frequency;
 105 
 106         enum xc2028_state       state;
 107         const char              *fname;
 108 
 109         struct firmware_description *firm;
 110         int                     firm_size;
 111         __u16                   firm_version;
 112 
 113         __u16                   hwmodel;
 114         __u16                   hwvers;
 115 
 116         struct xc2028_ctrl      ctrl;
 117 
 118         struct firmware_properties cur_fw;
 119 
 120         struct mutex lock;
 121 };
 122 
 123 #define i2c_send(priv, buf, size) ({                                    \
 124         int _rc;                                                        \
 125         _rc = tuner_i2c_xfer_send(&priv->i2c_props, buf, size);         \
 126         if (size != _rc)                                                \
 127                 tuner_info("i2c output error: rc = %d (should be %d)\n",\
 128                            _rc, (int)size);                             \
 129         if (priv->ctrl.msleep)                                          \
 130                 msleep(priv->ctrl.msleep);                              \
 131         _rc;                                                            \
 132 })
 133 
 134 #define i2c_send_recv(priv, obuf, osize, ibuf, isize) ({                \
 135         int _rc;                                                        \
 136         _rc = tuner_i2c_xfer_send_recv(&priv->i2c_props, obuf, osize,   \
 137                                        ibuf, isize);                    \
 138         if (isize != _rc)                                               \
 139                 tuner_err("i2c input error: rc = %d (should be %d)\n",  \
 140                            _rc, (int)isize);                            \
 141         if (priv->ctrl.msleep)                                          \
 142                 msleep(priv->ctrl.msleep);                              \
 143         _rc;                                                            \
 144 })
 145 
 146 #define send_seq(priv, data...) ({                                      \
 147         static u8 _val[] = data;                                        \
 148         int _rc;                                                        \
 149         if (sizeof(_val) !=                                             \
 150                         (_rc = tuner_i2c_xfer_send(&priv->i2c_props,    \
 151                                                 _val, sizeof(_val)))) { \
 152                 tuner_err("Error on line %d: %d\n", __LINE__, _rc);     \
 153         } else if (priv->ctrl.msleep)                                   \
 154                 msleep(priv->ctrl.msleep);                              \
 155         _rc;                                                            \
 156 })
 157 
 158 static int xc2028_get_reg(struct xc2028_data *priv, u16 reg, u16 *val)
 159 {
 160         unsigned char buf[2];
 161         unsigned char ibuf[2];
 162 
 163         tuner_dbg("%s %04x called\n", __func__, reg);
 164 
 165         buf[0] = reg >> 8;
 166         buf[1] = (unsigned char) reg;
 167 
 168         if (i2c_send_recv(priv, buf, 2, ibuf, 2) != 2)
 169                 return -EIO;
 170 
 171         *val = (ibuf[1]) | (ibuf[0] << 8);
 172         return 0;
 173 }
 174 
 175 #define dump_firm_type(t)       dump_firm_type_and_int_freq(t, 0)
 176 static void dump_firm_type_and_int_freq(unsigned int type, u16 int_freq)
 177 {
 178         if (type & BASE)
 179                 printk(KERN_CONT "BASE ");
 180         if (type & INIT1)
 181                 printk(KERN_CONT "INIT1 ");
 182         if (type & F8MHZ)
 183                 printk(KERN_CONT "F8MHZ ");
 184         if (type & MTS)
 185                 printk(KERN_CONT "MTS ");
 186         if (type & D2620)
 187                 printk(KERN_CONT "D2620 ");
 188         if (type & D2633)
 189                 printk(KERN_CONT "D2633 ");
 190         if (type & DTV6)
 191                 printk(KERN_CONT "DTV6 ");
 192         if (type & QAM)
 193                 printk(KERN_CONT "QAM ");
 194         if (type & DTV7)
 195                 printk(KERN_CONT "DTV7 ");
 196         if (type & DTV78)
 197                 printk(KERN_CONT "DTV78 ");
 198         if (type & DTV8)
 199                 printk(KERN_CONT "DTV8 ");
 200         if (type & FM)
 201                 printk(KERN_CONT "FM ");
 202         if (type & INPUT1)
 203                 printk(KERN_CONT "INPUT1 ");
 204         if (type & LCD)
 205                 printk(KERN_CONT "LCD ");
 206         if (type & NOGD)
 207                 printk(KERN_CONT "NOGD ");
 208         if (type & MONO)
 209                 printk(KERN_CONT "MONO ");
 210         if (type & ATSC)
 211                 printk(KERN_CONT "ATSC ");
 212         if (type & IF)
 213                 printk(KERN_CONT "IF ");
 214         if (type & LG60)
 215                 printk(KERN_CONT "LG60 ");
 216         if (type & ATI638)
 217                 printk(KERN_CONT "ATI638 ");
 218         if (type & OREN538)
 219                 printk(KERN_CONT "OREN538 ");
 220         if (type & OREN36)
 221                 printk(KERN_CONT "OREN36 ");
 222         if (type & TOYOTA388)
 223                 printk(KERN_CONT "TOYOTA388 ");
 224         if (type & TOYOTA794)
 225                 printk(KERN_CONT "TOYOTA794 ");
 226         if (type & DIBCOM52)
 227                 printk(KERN_CONT "DIBCOM52 ");
 228         if (type & ZARLINK456)
 229                 printk(KERN_CONT "ZARLINK456 ");
 230         if (type & CHINA)
 231                 printk(KERN_CONT "CHINA ");
 232         if (type & F6MHZ)
 233                 printk(KERN_CONT "F6MHZ ");
 234         if (type & INPUT2)
 235                 printk(KERN_CONT "INPUT2 ");
 236         if (type & SCODE)
 237                 printk(KERN_CONT "SCODE ");
 238         if (type & HAS_IF)
 239                 printk(KERN_CONT "HAS_IF_%d ", int_freq);
 240 }
 241 
 242 static  v4l2_std_id parse_audio_std_option(void)
 243 {
 244         if (strcasecmp(audio_std, "A2") == 0)
 245                 return V4L2_STD_A2;
 246         if (strcasecmp(audio_std, "A2/A") == 0)
 247                 return V4L2_STD_A2_A;
 248         if (strcasecmp(audio_std, "A2/B") == 0)
 249                 return V4L2_STD_A2_B;
 250         if (strcasecmp(audio_std, "NICAM") == 0)
 251                 return V4L2_STD_NICAM;
 252         if (strcasecmp(audio_std, "NICAM/A") == 0)
 253                 return V4L2_STD_NICAM_A;
 254         if (strcasecmp(audio_std, "NICAM/B") == 0)
 255                 return V4L2_STD_NICAM_B;
 256 
 257         return 0;
 258 }
 259 
 260 static int check_device_status(struct xc2028_data *priv)
 261 {
 262         switch (priv->state) {
 263         case XC2028_NO_FIRMWARE:
 264         case XC2028_WAITING_FIRMWARE:
 265                 return -EAGAIN;
 266         case XC2028_ACTIVE:
 267                 return 1;
 268         case XC2028_SLEEP:
 269                 return 0;
 270         case XC2028_NODEV:
 271                 return -ENODEV;
 272         }
 273         return 0;
 274 }
 275 
 276 static void free_firmware(struct xc2028_data *priv)
 277 {
 278         int i;
 279         tuner_dbg("%s called\n", __func__);
 280 
 281         /* free allocated f/w string */
 282         if (priv->fname != firmware_name)
 283                 kfree(priv->fname);
 284         priv->fname = NULL;
 285 
 286         priv->state = XC2028_NO_FIRMWARE;
 287         memset(&priv->cur_fw, 0, sizeof(priv->cur_fw));
 288 
 289         if (!priv->firm)
 290                 return;
 291 
 292         for (i = 0; i < priv->firm_size; i++)
 293                 kfree(priv->firm[i].ptr);
 294 
 295         kfree(priv->firm);
 296 
 297         priv->firm = NULL;
 298         priv->firm_size = 0;
 299 }
 300 
 301 static int load_all_firmwares(struct dvb_frontend *fe,
 302                               const struct firmware *fw)
 303 {
 304         struct xc2028_data    *priv = fe->tuner_priv;
 305         const unsigned char   *p, *endp;
 306         int                   rc = 0;
 307         int                   n, n_array;
 308         char                  name[33];
 309 
 310         tuner_dbg("%s called\n", __func__);
 311 
 312         p = fw->data;
 313         endp = p + fw->size;
 314 
 315         if (fw->size < sizeof(name) - 1 + 2 + 2) {
 316                 tuner_err("Error: firmware file %s has invalid size!\n",
 317                           priv->fname);
 318                 goto corrupt;
 319         }
 320 
 321         memcpy(name, p, sizeof(name) - 1);
 322         name[sizeof(name) - 1] = 0;
 323         p += sizeof(name) - 1;
 324 
 325         priv->firm_version = get_unaligned_le16(p);
 326         p += 2;
 327 
 328         n_array = get_unaligned_le16(p);
 329         p += 2;
 330 
 331         tuner_info("Loading %d firmware images from %s, type: %s, ver %d.%d\n",
 332                    n_array, priv->fname, name,
 333                    priv->firm_version >> 8, priv->firm_version & 0xff);
 334 
 335         priv->firm = kcalloc(n_array, sizeof(*priv->firm), GFP_KERNEL);
 336         if (priv->firm == NULL) {
 337                 tuner_err("Not enough memory to load firmware file.\n");
 338                 rc = -ENOMEM;
 339                 goto err;
 340         }
 341         priv->firm_size = n_array;
 342 
 343         n = -1;
 344         while (p < endp) {
 345                 __u32 type, size;
 346                 v4l2_std_id id;
 347                 __u16 int_freq = 0;
 348 
 349                 n++;
 350                 if (n >= n_array) {
 351                         tuner_err("More firmware images in file than were expected!\n");
 352                         goto corrupt;
 353                 }
 354 
 355                 /* Checks if there's enough bytes to read */
 356                 if (endp - p < sizeof(type) + sizeof(id) + sizeof(size))
 357                         goto header;
 358 
 359                 type = get_unaligned_le32(p);
 360                 p += sizeof(type);
 361 
 362                 id = get_unaligned_le64(p);
 363                 p += sizeof(id);
 364 
 365                 if (type & HAS_IF) {
 366                         int_freq = get_unaligned_le16(p);
 367                         p += sizeof(int_freq);
 368                         if (endp - p < sizeof(size))
 369                                 goto header;
 370                 }
 371 
 372                 size = get_unaligned_le32(p);
 373                 p += sizeof(size);
 374 
 375                 if (!size || size > endp - p) {
 376                         tuner_err("Firmware type ");
 377                         dump_firm_type(type);
 378                         printk(KERN_CONT
 379                                "(%x), id %llx is corrupted (size=%zd, expected %d)\n",
 380                                type, (unsigned long long)id, (endp - p), size);
 381                         goto corrupt;
 382                 }
 383 
 384                 priv->firm[n].ptr = kmemdup(p, size, GFP_KERNEL);
 385                 if (priv->firm[n].ptr == NULL) {
 386                         tuner_err("Not enough memory to load firmware file.\n");
 387                         rc = -ENOMEM;
 388                         goto err;
 389                 }
 390                 tuner_dbg("Reading firmware type ");
 391                 if (debug) {
 392                         dump_firm_type_and_int_freq(type, int_freq);
 393                         printk(KERN_CONT "(%x), id %llx, size=%d.\n",
 394                                type, (unsigned long long)id, size);
 395                 }
 396 
 397                 priv->firm[n].type = type;
 398                 priv->firm[n].id   = id;
 399                 priv->firm[n].size = size;
 400                 priv->firm[n].int_freq = int_freq;
 401 
 402                 p += size;
 403         }
 404 
 405         if (n + 1 != priv->firm_size) {
 406                 tuner_err("Firmware file is incomplete!\n");
 407                 goto corrupt;
 408         }
 409 
 410         goto done;
 411 
 412 header:
 413         tuner_err("Firmware header is incomplete!\n");
 414 corrupt:
 415         rc = -EINVAL;
 416         tuner_err("Error: firmware file is corrupted!\n");
 417 
 418 err:
 419         tuner_info("Releasing partially loaded firmware file.\n");
 420         free_firmware(priv);
 421 
 422 done:
 423         if (rc == 0)
 424                 tuner_dbg("Firmware files loaded.\n");
 425         else
 426                 priv->state = XC2028_NODEV;
 427 
 428         return rc;
 429 }
 430 
 431 static int seek_firmware(struct dvb_frontend *fe, unsigned int type,
 432                          v4l2_std_id *id)
 433 {
 434         struct xc2028_data *priv = fe->tuner_priv;
 435         int                 i, best_i = -1, best_nr_matches = 0;
 436         unsigned int        type_mask = 0;
 437 
 438         tuner_dbg("%s called, want type=", __func__);
 439         if (debug) {
 440                 dump_firm_type(type);
 441                 printk(KERN_CONT "(%x), id %016llx.\n",
 442                        type, (unsigned long long)*id);
 443         }
 444 
 445         if (!priv->firm) {
 446                 tuner_err("Error! firmware not loaded\n");
 447                 return -EINVAL;
 448         }
 449 
 450         if (((type & ~SCODE) == 0) && (*id == 0))
 451                 *id = V4L2_STD_PAL;
 452 
 453         if (type & BASE)
 454                 type_mask = BASE_TYPES;
 455         else if (type & SCODE) {
 456                 type &= SCODE_TYPES;
 457                 type_mask = SCODE_TYPES & ~HAS_IF;
 458         } else if (type & DTV_TYPES)
 459                 type_mask = DTV_TYPES;
 460         else if (type & STD_SPECIFIC_TYPES)
 461                 type_mask = STD_SPECIFIC_TYPES;
 462 
 463         type &= type_mask;
 464 
 465         if (!(type & SCODE))
 466                 type_mask = ~0;
 467 
 468         /* Seek for exact match */
 469         for (i = 0; i < priv->firm_size; i++) {
 470                 if ((type == (priv->firm[i].type & type_mask)) &&
 471                     (*id == priv->firm[i].id))
 472                         goto found;
 473         }
 474 
 475         /* Seek for generic video standard match */
 476         for (i = 0; i < priv->firm_size; i++) {
 477                 v4l2_std_id match_mask;
 478                 int nr_matches;
 479 
 480                 if (type != (priv->firm[i].type & type_mask))
 481                         continue;
 482 
 483                 match_mask = *id & priv->firm[i].id;
 484                 if (!match_mask)
 485                         continue;
 486 
 487                 if ((*id & match_mask) == *id)
 488                         goto found; /* Supports all the requested standards */
 489 
 490                 nr_matches = hweight64(match_mask);
 491                 if (nr_matches > best_nr_matches) {
 492                         best_nr_matches = nr_matches;
 493                         best_i = i;
 494                 }
 495         }
 496 
 497         if (best_nr_matches > 0) {
 498                 tuner_dbg("Selecting best matching firmware (%d bits) for type=",
 499                           best_nr_matches);
 500                 dump_firm_type(type);
 501                 printk(KERN_CONT
 502                        "(%x), id %016llx:\n", type, (unsigned long long)*id);
 503                 i = best_i;
 504                 goto found;
 505         }
 506 
 507         /*FIXME: Would make sense to seek for type "hint" match ? */
 508 
 509         i = -ENOENT;
 510         goto ret;
 511 
 512 found:
 513         *id = priv->firm[i].id;
 514 
 515 ret:
 516         tuner_dbg("%s firmware for type=", (i < 0) ? "Can't find" : "Found");
 517         if (debug) {
 518                 dump_firm_type(type);
 519                 printk(KERN_CONT "(%x), id %016llx.\n",
 520                        type, (unsigned long long)*id);
 521         }
 522         return i;
 523 }
 524 
 525 static inline int do_tuner_callback(struct dvb_frontend *fe, int cmd, int arg)
 526 {
 527         struct xc2028_data *priv = fe->tuner_priv;
 528 
 529         /* analog side (tuner-core) uses i2c_adap->algo_data.
 530          * digital side is not guaranteed to have algo_data defined.
 531          *
 532          * digital side will always have fe->dvb defined.
 533          * analog side (tuner-core) doesn't (yet) define fe->dvb.
 534          */
 535 
 536         return (!fe->callback) ? -EINVAL :
 537                 fe->callback(((fe->dvb) && (fe->dvb->priv)) ?
 538                                 fe->dvb->priv : priv->i2c_props.adap->algo_data,
 539                              DVB_FRONTEND_COMPONENT_TUNER, cmd, arg);
 540 }
 541 
 542 static int load_firmware(struct dvb_frontend *fe, unsigned int type,
 543                          v4l2_std_id *id)
 544 {
 545         struct xc2028_data *priv = fe->tuner_priv;
 546         int                pos, rc;
 547         unsigned char      *p, *endp, buf[MAX_XFER_SIZE];
 548 
 549         if (priv->ctrl.max_len > sizeof(buf))
 550                 priv->ctrl.max_len = sizeof(buf);
 551 
 552         tuner_dbg("%s called\n", __func__);
 553 
 554         pos = seek_firmware(fe, type, id);
 555         if (pos < 0)
 556                 return pos;
 557 
 558         tuner_info("Loading firmware for type=");
 559         dump_firm_type(priv->firm[pos].type);
 560         printk(KERN_CONT "(%x), id %016llx.\n",
 561                priv->firm[pos].type, (unsigned long long)*id);
 562 
 563         p = priv->firm[pos].ptr;
 564         endp = p + priv->firm[pos].size;
 565 
 566         while (p < endp) {
 567                 __u16 size;
 568 
 569                 /* Checks if there's enough bytes to read */
 570                 if (p + sizeof(size) > endp) {
 571                         tuner_err("Firmware chunk size is wrong\n");
 572                         return -EINVAL;
 573                 }
 574 
 575                 size = le16_to_cpu(*(__le16 *) p);
 576                 p += sizeof(size);
 577 
 578                 if (size == 0xffff)
 579                         return 0;
 580 
 581                 if (!size) {
 582                         /* Special callback command received */
 583                         rc = do_tuner_callback(fe, XC2028_TUNER_RESET, 0);
 584                         if (rc < 0) {
 585                                 tuner_err("Error at RESET code %d\n",
 586                                            (*p) & 0x7f);
 587                                 return -EINVAL;
 588                         }
 589                         continue;
 590                 }
 591                 if (size >= 0xff00) {
 592                         switch (size) {
 593                         case 0xff00:
 594                                 rc = do_tuner_callback(fe, XC2028_RESET_CLK, 0);
 595                                 if (rc < 0) {
 596                                         tuner_err("Error at RESET code %d\n",
 597                                                   (*p) & 0x7f);
 598                                         return -EINVAL;
 599                                 }
 600                                 break;
 601                         default:
 602                                 tuner_info("Invalid RESET code %d\n",
 603                                            size & 0x7f);
 604                                 return -EINVAL;
 605 
 606                         }
 607                         continue;
 608                 }
 609 
 610                 /* Checks for a sleep command */
 611                 if (size & 0x8000) {
 612                         msleep(size & 0x7fff);
 613                         continue;
 614                 }
 615 
 616                 if ((size + p > endp)) {
 617                         tuner_err("missing bytes: need %d, have %zd\n",
 618                                    size, (endp - p));
 619                         return -EINVAL;
 620                 }
 621 
 622                 buf[0] = *p;
 623                 p++;
 624                 size--;
 625 
 626                 /* Sends message chunks */
 627                 while (size > 0) {
 628                         int len = (size < priv->ctrl.max_len - 1) ?
 629                                    size : priv->ctrl.max_len - 1;
 630 
 631                         memcpy(buf + 1, p, len);
 632 
 633                         rc = i2c_send(priv, buf, len + 1);
 634                         if (rc < 0) {
 635                                 tuner_err("%d returned from send\n", rc);
 636                                 return -EINVAL;
 637                         }
 638 
 639                         p += len;
 640                         size -= len;
 641                 }
 642 
 643                 /* silently fail if the frontend doesn't support I2C flush */
 644                 rc = do_tuner_callback(fe, XC2028_I2C_FLUSH, 0);
 645                 if ((rc < 0) && (rc != -EINVAL)) {
 646                         tuner_err("error executing flush: %d\n", rc);
 647                         return rc;
 648                 }
 649         }
 650         return 0;
 651 }
 652 
 653 static int load_scode(struct dvb_frontend *fe, unsigned int type,
 654                          v4l2_std_id *id, __u16 int_freq, int scode)
 655 {
 656         struct xc2028_data *priv = fe->tuner_priv;
 657         int                pos, rc;
 658         unsigned char      *p;
 659 
 660         tuner_dbg("%s called\n", __func__);
 661 
 662         if (!int_freq) {
 663                 pos = seek_firmware(fe, type, id);
 664                 if (pos < 0)
 665                         return pos;
 666         } else {
 667                 for (pos = 0; pos < priv->firm_size; pos++) {
 668                         if ((priv->firm[pos].int_freq == int_freq) &&
 669                             (priv->firm[pos].type & HAS_IF))
 670                                 break;
 671                 }
 672                 if (pos == priv->firm_size)
 673                         return -ENOENT;
 674         }
 675 
 676         p = priv->firm[pos].ptr;
 677 
 678         if (priv->firm[pos].type & HAS_IF) {
 679                 if (priv->firm[pos].size != 12 * 16 || scode >= 16)
 680                         return -EINVAL;
 681                 p += 12 * scode;
 682         } else {
 683                 /* 16 SCODE entries per file; each SCODE entry is 12 bytes and
 684                  * has a 2-byte size header in the firmware format. */
 685                 if (priv->firm[pos].size != 14 * 16 || scode >= 16 ||
 686                     le16_to_cpu(*(__le16 *)(p + 14 * scode)) != 12)
 687                         return -EINVAL;
 688                 p += 14 * scode + 2;
 689         }
 690 
 691         tuner_info("Loading SCODE for type=");
 692         dump_firm_type_and_int_freq(priv->firm[pos].type,
 693                                     priv->firm[pos].int_freq);
 694         printk(KERN_CONT "(%x), id %016llx.\n", priv->firm[pos].type,
 695                (unsigned long long)*id);
 696 
 697         if (priv->firm_version < 0x0202)
 698                 rc = send_seq(priv, {0x20, 0x00, 0x00, 0x00});
 699         else
 700                 rc = send_seq(priv, {0xa0, 0x00, 0x00, 0x00});
 701         if (rc < 0)
 702                 return -EIO;
 703 
 704         rc = i2c_send(priv, p, 12);
 705         if (rc < 0)
 706                 return -EIO;
 707 
 708         rc = send_seq(priv, {0x00, 0x8c});
 709         if (rc < 0)
 710                 return -EIO;
 711 
 712         return 0;
 713 }
 714 
 715 static int xc2028_sleep(struct dvb_frontend *fe);
 716 
 717 static int check_firmware(struct dvb_frontend *fe, unsigned int type,
 718                           v4l2_std_id std, __u16 int_freq)
 719 {
 720         struct xc2028_data         *priv = fe->tuner_priv;
 721         struct firmware_properties new_fw;
 722         int                        rc, retry_count = 0;
 723         u16                        version, hwmodel;
 724         v4l2_std_id                std0;
 725 
 726         tuner_dbg("%s called\n", __func__);
 727 
 728         rc = check_device_status(priv);
 729         if (rc < 0)
 730                 return rc;
 731 
 732         if (priv->ctrl.mts && !(type & FM))
 733                 type |= MTS;
 734 
 735 retry:
 736         new_fw.type = type;
 737         new_fw.id = std;
 738         new_fw.std_req = std;
 739         new_fw.scode_table = SCODE | priv->ctrl.scode_table;
 740         new_fw.scode_nr = 0;
 741         new_fw.int_freq = int_freq;
 742 
 743         tuner_dbg("checking firmware, user requested type=");
 744         if (debug) {
 745                 dump_firm_type(new_fw.type);
 746                 printk(KERN_CONT "(%x), id %016llx, ", new_fw.type,
 747                        (unsigned long long)new_fw.std_req);
 748                 if (!int_freq) {
 749                         printk(KERN_CONT "scode_tbl ");
 750                         dump_firm_type(priv->ctrl.scode_table);
 751                         printk(KERN_CONT "(%x), ", priv->ctrl.scode_table);
 752                 } else
 753                         printk(KERN_CONT "int_freq %d, ", new_fw.int_freq);
 754                 printk(KERN_CONT "scode_nr %d\n", new_fw.scode_nr);
 755         }
 756 
 757         /*
 758          * No need to reload base firmware if it matches and if the tuner
 759          * is not at sleep mode
 760          */
 761         if ((priv->state == XC2028_ACTIVE) &&
 762             (((BASE | new_fw.type) & BASE_TYPES) ==
 763             (priv->cur_fw.type & BASE_TYPES))) {
 764                 tuner_dbg("BASE firmware not changed.\n");
 765                 goto skip_base;
 766         }
 767 
 768         /* Updating BASE - forget about all currently loaded firmware */
 769         memset(&priv->cur_fw, 0, sizeof(priv->cur_fw));
 770 
 771         /* Reset is needed before loading firmware */
 772         rc = do_tuner_callback(fe, XC2028_TUNER_RESET, 0);
 773         if (rc < 0)
 774                 goto fail;
 775 
 776         /* BASE firmwares are all std0 */
 777         std0 = 0;
 778         rc = load_firmware(fe, BASE | new_fw.type, &std0);
 779         if (rc < 0) {
 780                 tuner_err("Error %d while loading base firmware\n",
 781                           rc);
 782                 goto fail;
 783         }
 784 
 785         /* Load INIT1, if needed */
 786         tuner_dbg("Load init1 firmware, if exists\n");
 787 
 788         rc = load_firmware(fe, BASE | INIT1 | new_fw.type, &std0);
 789         if (rc == -ENOENT)
 790                 rc = load_firmware(fe, (BASE | INIT1 | new_fw.type) & ~F8MHZ,
 791                                    &std0);
 792         if (rc < 0 && rc != -ENOENT) {
 793                 tuner_err("Error %d while loading init1 firmware\n",
 794                           rc);
 795                 goto fail;
 796         }
 797 
 798 skip_base:
 799         /*
 800          * No need to reload standard specific firmware if base firmware
 801          * was not reloaded and requested video standards have not changed.
 802          */
 803         if (priv->cur_fw.type == (BASE | new_fw.type) &&
 804             priv->cur_fw.std_req == std) {
 805                 tuner_dbg("Std-specific firmware already loaded.\n");
 806                 goto skip_std_specific;
 807         }
 808 
 809         /* Reloading std-specific firmware forces a SCODE update */
 810         priv->cur_fw.scode_table = 0;
 811 
 812         rc = load_firmware(fe, new_fw.type, &new_fw.id);
 813         if (rc == -ENOENT)
 814                 rc = load_firmware(fe, new_fw.type & ~F8MHZ, &new_fw.id);
 815 
 816         if (rc < 0)
 817                 goto fail;
 818 
 819 skip_std_specific:
 820         if (priv->cur_fw.scode_table == new_fw.scode_table &&
 821             priv->cur_fw.scode_nr == new_fw.scode_nr) {
 822                 tuner_dbg("SCODE firmware already loaded.\n");
 823                 goto check_device;
 824         }
 825 
 826         if (new_fw.type & FM)
 827                 goto check_device;
 828 
 829         /* Load SCODE firmware, if exists */
 830         tuner_dbg("Trying to load scode %d\n", new_fw.scode_nr);
 831 
 832         rc = load_scode(fe, new_fw.type | new_fw.scode_table, &new_fw.id,
 833                         new_fw.int_freq, new_fw.scode_nr);
 834 
 835 check_device:
 836         if (xc2028_get_reg(priv, 0x0004, &version) < 0 ||
 837             xc2028_get_reg(priv, 0x0008, &hwmodel) < 0) {
 838                 tuner_err("Unable to read tuner registers.\n");
 839                 goto fail;
 840         }
 841 
 842         tuner_dbg("Device is Xceive %d version %d.%d, firmware version %d.%d\n",
 843                   hwmodel, (version & 0xf000) >> 12, (version & 0xf00) >> 8,
 844                   (version & 0xf0) >> 4, version & 0xf);
 845 
 846 
 847         if (priv->ctrl.read_not_reliable)
 848                 goto read_not_reliable;
 849 
 850         /* Check firmware version against what we downloaded. */
 851         if (priv->firm_version != ((version & 0xf0) << 4 | (version & 0x0f))) {
 852                 if (!priv->ctrl.read_not_reliable) {
 853                         tuner_err("Incorrect readback of firmware version.\n");
 854                         goto fail;
 855                 } else {
 856                         tuner_err("Returned an incorrect version. However, read is not reliable enough. Ignoring it.\n");
 857                         hwmodel = 3028;
 858                 }
 859         }
 860 
 861         /* Check that the tuner hardware model remains consistent over time. */
 862         if (priv->hwmodel == 0 && (hwmodel == 2028 || hwmodel == 3028)) {
 863                 priv->hwmodel = hwmodel;
 864                 priv->hwvers  = version & 0xff00;
 865         } else if (priv->hwmodel == 0 || priv->hwmodel != hwmodel ||
 866                    priv->hwvers != (version & 0xff00)) {
 867                 tuner_err("Read invalid device hardware information - tuner hung?\n");
 868                 goto fail;
 869         }
 870 
 871 read_not_reliable:
 872         priv->cur_fw = new_fw;
 873 
 874         /*
 875          * By setting BASE in cur_fw.type only after successfully loading all
 876          * firmwares, we can:
 877          * 1. Identify that BASE firmware with type=0 has been loaded;
 878          * 2. Tell whether BASE firmware was just changed the next time through.
 879          */
 880         priv->cur_fw.type |= BASE;
 881         priv->state = XC2028_ACTIVE;
 882 
 883         return 0;
 884 
 885 fail:
 886         free_firmware(priv);
 887 
 888         if (retry_count < 8) {
 889                 msleep(50);
 890                 retry_count++;
 891                 tuner_dbg("Retrying firmware load\n");
 892                 goto retry;
 893         }
 894 
 895         /* Firmware didn't load. Put the device to sleep */
 896         xc2028_sleep(fe);
 897 
 898         if (rc == -ENOENT)
 899                 rc = -EINVAL;
 900         return rc;
 901 }
 902 
 903 static int xc2028_signal(struct dvb_frontend *fe, u16 *strength)
 904 {
 905         struct xc2028_data *priv = fe->tuner_priv;
 906         u16                 frq_lock, signal = 0;
 907         int                 rc, i;
 908 
 909         tuner_dbg("%s called\n", __func__);
 910 
 911         rc = check_device_status(priv);
 912         if (rc < 0)
 913                 return rc;
 914 
 915         /* If the device is sleeping, no channel is tuned */
 916         if (!rc) {
 917                 *strength = 0;
 918                 return 0;
 919         }
 920 
 921         mutex_lock(&priv->lock);
 922 
 923         /* Sync Lock Indicator */
 924         for (i = 0; i < 3; i++) {
 925                 rc = xc2028_get_reg(priv, XREG_LOCK, &frq_lock);
 926                 if (rc < 0)
 927                         goto ret;
 928 
 929                 if (frq_lock)
 930                         break;
 931                 msleep(6);
 932         }
 933 
 934         /* Frequency didn't lock */
 935         if (frq_lock == 2)
 936                 goto ret;
 937 
 938         /* Get SNR of the video signal */
 939         rc = xc2028_get_reg(priv, XREG_SNR, &signal);
 940         if (rc < 0)
 941                 goto ret;
 942 
 943         /* Signal level is 3 bits only */
 944 
 945         signal = ((1 << 12) - 1) | ((signal & 0x07) << 12);
 946 
 947 ret:
 948         mutex_unlock(&priv->lock);
 949 
 950         *strength = signal;
 951 
 952         tuner_dbg("signal strength is %d\n", signal);
 953 
 954         return rc;
 955 }
 956 
 957 static int xc2028_get_afc(struct dvb_frontend *fe, s32 *afc)
 958 {
 959         struct xc2028_data *priv = fe->tuner_priv;
 960         int i, rc;
 961         u16 frq_lock = 0;
 962         s16 afc_reg = 0;
 963 
 964         rc = check_device_status(priv);
 965         if (rc < 0)
 966                 return rc;
 967 
 968         /* If the device is sleeping, no channel is tuned */
 969         if (!rc) {
 970                 *afc = 0;
 971                 return 0;
 972         }
 973 
 974         mutex_lock(&priv->lock);
 975 
 976         /* Sync Lock Indicator */
 977         for (i = 0; i < 3; i++) {
 978                 rc = xc2028_get_reg(priv, XREG_LOCK, &frq_lock);
 979                 if (rc < 0)
 980                         goto ret;
 981 
 982                 if (frq_lock)
 983                         break;
 984                 msleep(6);
 985         }
 986 
 987         /* Frequency didn't lock */
 988         if (frq_lock == 2)
 989                 goto ret;
 990 
 991         /* Get AFC */
 992         rc = xc2028_get_reg(priv, XREG_FREQ_ERROR, &afc_reg);
 993         if (rc < 0)
 994                 goto ret;
 995 
 996         *afc = afc_reg * 15625; /* Hz */
 997 
 998         tuner_dbg("AFC is %d Hz\n", *afc);
 999 
1000 ret:
1001         mutex_unlock(&priv->lock);
1002 
1003         return rc;
1004 }
1005 
1006 #define DIV 15625
1007 
1008 static int generic_set_freq(struct dvb_frontend *fe, u32 freq /* in HZ */,
1009                             enum v4l2_tuner_type new_type,
1010                             unsigned int type,
1011                             v4l2_std_id std,
1012                             u16 int_freq)
1013 {
1014         struct xc2028_data *priv = fe->tuner_priv;
1015         int                rc = -EINVAL;
1016         unsigned char      buf[4];
1017         u32                div, offset = 0;
1018 
1019         tuner_dbg("%s called\n", __func__);
1020 
1021         mutex_lock(&priv->lock);
1022 
1023         tuner_dbg("should set frequency %d kHz\n", freq / 1000);
1024 
1025         if (check_firmware(fe, type, std, int_freq) < 0)
1026                 goto ret;
1027 
1028         /* On some cases xc2028 can disable video output, if
1029          * very weak signals are received. By sending a soft
1030          * reset, this is re-enabled. So, it is better to always
1031          * send a soft reset before changing channels, to be sure
1032          * that xc2028 will be in a safe state.
1033          * Maybe this might also be needed for DTV.
1034          */
1035         switch (new_type) {
1036         case V4L2_TUNER_ANALOG_TV:
1037                 rc = send_seq(priv, {0x00, 0x00});
1038 
1039                 /* Analog mode requires offset = 0 */
1040                 break;
1041         case V4L2_TUNER_RADIO:
1042                 /* Radio mode requires offset = 0 */
1043                 break;
1044         case V4L2_TUNER_DIGITAL_TV:
1045                 /*
1046                  * Digital modes require an offset to adjust to the
1047                  * proper frequency. The offset depends on what
1048                  * firmware version is used.
1049                  */
1050 
1051                 /*
1052                  * Adjust to the center frequency. This is calculated by the
1053                  * formula: offset = 1.25MHz - BW/2
1054                  * For DTV 7/8, the firmware uses BW = 8000, so it needs a
1055                  * further adjustment to get the frequency center on VHF
1056                  */
1057 
1058                 /*
1059                  * The firmware DTV78 used to work fine in UHF band (8 MHz
1060                  * bandwidth) but not at all in VHF band (7 MHz bandwidth).
1061                  * The real problem was connected to the formula used to
1062                  * calculate the center frequency offset in VHF band.
1063                  * In fact, removing the 500KHz adjustment fixed the problem.
1064                  * This is coherent to what was implemented for the DTV7
1065                  * firmware.
1066                  * In the end, now the center frequency is the same for all 3
1067                  * firmwares (DTV7, DTV8, DTV78) and doesn't depend on channel
1068                  * bandwidth.
1069                  */
1070 
1071                 if (priv->cur_fw.type & DTV6)
1072                         offset = 1750000;
1073                 else    /* DTV7 or DTV8 or DTV78 */
1074                         offset = 2750000;
1075 
1076                 /*
1077                  * xc3028 additional "magic"
1078                  * Depending on the firmware version, it needs some adjustments
1079                  * to properly centralize the frequency. This seems to be
1080                  * needed to compensate the SCODE table adjustments made by
1081                  * newer firmwares
1082                  */
1083 
1084                 /*
1085                  * The proper adjustment would be to do it at s-code table.
1086                  * However, this didn't work, as reported by
1087                  * Robert Lowery <rglowery@exemail.com.au>
1088                  */
1089 
1090 #if 0
1091                 /*
1092                  * Still need tests for XC3028L (firmware 3.2 or upper)
1093                  * So, for now, let's just comment the per-firmware
1094                  * version of this change. Reports with xc3028l working
1095                  * with and without the lines below are welcome
1096                  */
1097 
1098                 if (priv->firm_version < 0x0302) {
1099                         if (priv->cur_fw.type & DTV7)
1100                                 offset += 500000;
1101                 } else {
1102                         if (priv->cur_fw.type & DTV7)
1103                                 offset -= 300000;
1104                         else if (type != ATSC) /* DVB @6MHz, DTV 8 and DTV 7/8 */
1105                                 offset += 200000;
1106                 }
1107 #endif
1108                 break;
1109         default:
1110                 tuner_err("Unsupported tuner type %d.\n", new_type);
1111                 break;
1112         }
1113 
1114         div = (freq - offset + DIV / 2) / DIV;
1115 
1116         /* CMD= Set frequency */
1117         if (priv->firm_version < 0x0202)
1118                 rc = send_seq(priv, {0x00, XREG_RF_FREQ, 0x00, 0x00});
1119         else
1120                 rc = send_seq(priv, {0x80, XREG_RF_FREQ, 0x00, 0x00});
1121         if (rc < 0)
1122                 goto ret;
1123 
1124         /* Return code shouldn't be checked.
1125            The reset CLK is needed only with tm6000.
1126            Driver should work fine even if this fails.
1127          */
1128         if (priv->ctrl.msleep)
1129                 msleep(priv->ctrl.msleep);
1130         do_tuner_callback(fe, XC2028_RESET_CLK, 1);
1131 
1132         msleep(10);
1133 
1134         buf[0] = 0xff & (div >> 24);
1135         buf[1] = 0xff & (div >> 16);
1136         buf[2] = 0xff & (div >> 8);
1137         buf[3] = 0xff & (div);
1138 
1139         rc = i2c_send(priv, buf, sizeof(buf));
1140         if (rc < 0)
1141                 goto ret;
1142         msleep(100);
1143 
1144         priv->frequency = freq;
1145 
1146         tuner_dbg("divisor= %*ph (freq=%d.%03d)\n", 4, buf,
1147                freq / 1000000, (freq % 1000000) / 1000);
1148 
1149         rc = 0;
1150 
1151 ret:
1152         mutex_unlock(&priv->lock);
1153 
1154         return rc;
1155 }
1156 
1157 static int xc2028_set_analog_freq(struct dvb_frontend *fe,
1158                               struct analog_parameters *p)
1159 {
1160         struct xc2028_data *priv = fe->tuner_priv;
1161         unsigned int       type=0;
1162 
1163         tuner_dbg("%s called\n", __func__);
1164 
1165         if (p->mode == V4L2_TUNER_RADIO) {
1166                 type |= FM;
1167                 if (priv->ctrl.input1)
1168                         type |= INPUT1;
1169                 return generic_set_freq(fe, (625l * p->frequency) / 10,
1170                                 V4L2_TUNER_RADIO, type, 0, 0);
1171         }
1172 
1173         /* if std is not defined, choose one */
1174         if (!p->std)
1175                 p->std = V4L2_STD_MN;
1176 
1177         /* PAL/M, PAL/N, PAL/Nc and NTSC variants should use 6MHz firmware */
1178         if (!(p->std & V4L2_STD_MN))
1179                 type |= F8MHZ;
1180 
1181         /* Add audio hack to std mask */
1182         p->std |= parse_audio_std_option();
1183 
1184         return generic_set_freq(fe, 62500l * p->frequency,
1185                                 V4L2_TUNER_ANALOG_TV, type, p->std, 0);
1186 }
1187 
1188 static int xc2028_set_params(struct dvb_frontend *fe)
1189 {
1190         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1191         u32 delsys = c->delivery_system;
1192         u32 bw = c->bandwidth_hz;
1193         struct xc2028_data *priv = fe->tuner_priv;
1194         int rc;
1195         unsigned int       type = 0;
1196         u16                demod = 0;
1197 
1198         tuner_dbg("%s called\n", __func__);
1199 
1200         rc = check_device_status(priv);
1201         if (rc < 0)
1202                 return rc;
1203 
1204         switch (delsys) {
1205         case SYS_DVBT:
1206         case SYS_DVBT2:
1207                 /*
1208                  * The only countries with 6MHz seem to be Taiwan/Uruguay.
1209                  * Both seem to require QAM firmware for OFDM decoding
1210                  * Tested in Taiwan by Terry Wu <terrywu2009@gmail.com>
1211                  */
1212                 if (bw <= 6000000)
1213                         type |= QAM;
1214 
1215                 switch (priv->ctrl.type) {
1216                 case XC2028_D2633:
1217                         type |= D2633;
1218                         break;
1219                 case XC2028_D2620:
1220                         type |= D2620;
1221                         break;
1222                 case XC2028_AUTO:
1223                 default:
1224                         /* Zarlink seems to need D2633 */
1225                         if (priv->ctrl.demod == XC3028_FE_ZARLINK456)
1226                                 type |= D2633;
1227                         else
1228                                 type |= D2620;
1229                 }
1230                 break;
1231         case SYS_ATSC:
1232                 /* The only ATSC firmware (at least on v2.7) is D2633 */
1233                 type |= ATSC | D2633;
1234                 break;
1235         /* DVB-S and pure QAM (FE_QAM) are not supported */
1236         default:
1237                 return -EINVAL;
1238         }
1239 
1240         if (bw <= 6000000) {
1241                 type |= DTV6;
1242                 priv->ctrl.vhfbw7 = 0;
1243                 priv->ctrl.uhfbw8 = 0;
1244         } else if (bw <= 7000000) {
1245                 if (c->frequency < 470000000)
1246                         priv->ctrl.vhfbw7 = 1;
1247                 else
1248                         priv->ctrl.uhfbw8 = 0;
1249                 type |= (priv->ctrl.vhfbw7 && priv->ctrl.uhfbw8) ? DTV78 : DTV7;
1250                 type |= F8MHZ;
1251         } else {
1252                 if (c->frequency < 470000000)
1253                         priv->ctrl.vhfbw7 = 0;
1254                 else
1255                         priv->ctrl.uhfbw8 = 1;
1256                 type |= (priv->ctrl.vhfbw7 && priv->ctrl.uhfbw8) ? DTV78 : DTV8;
1257                 type |= F8MHZ;
1258         }
1259 
1260         /* All S-code tables need a 200kHz shift */
1261         if (priv->ctrl.demod) {
1262                 demod = priv->ctrl.demod;
1263 
1264                 /*
1265                  * Newer firmwares require a 200 kHz offset only for ATSC
1266                  */
1267                 if (type == ATSC || priv->firm_version < 0x0302)
1268                         demod += 200;
1269                 /*
1270                  * The DTV7 S-code table needs a 700 kHz shift.
1271                  *
1272                  * DTV7 is only used in Australia.  Germany or Italy may also
1273                  * use this firmware after initialization, but a tune to a UHF
1274                  * channel should then cause DTV78 to be used.
1275                  *
1276                  * Unfortunately, on real-field tests, the s-code offset
1277                  * didn't work as expected, as reported by
1278                  * Robert Lowery <rglowery@exemail.com.au>
1279                  */
1280         }
1281 
1282         return generic_set_freq(fe, c->frequency,
1283                                 V4L2_TUNER_DIGITAL_TV, type, 0, demod);
1284 }
1285 
1286 static int xc2028_sleep(struct dvb_frontend *fe)
1287 {
1288         struct xc2028_data *priv = fe->tuner_priv;
1289         int rc;
1290 
1291         rc = check_device_status(priv);
1292         if (rc < 0)
1293                 return rc;
1294 
1295         /* Device is already in sleep mode */
1296         if (!rc)
1297                 return 0;
1298 
1299         /* Avoid firmware reload on slow devices or if PM disabled */
1300         if (no_poweroff || priv->ctrl.disable_power_mgmt)
1301                 return 0;
1302 
1303         tuner_dbg("Putting xc2028/3028 into poweroff mode.\n");
1304         if (debug > 1) {
1305                 tuner_dbg("Printing sleep stack trace:\n");
1306                 dump_stack();
1307         }
1308 
1309         mutex_lock(&priv->lock);
1310 
1311         if (priv->firm_version < 0x0202)
1312                 rc = send_seq(priv, {0x00, XREG_POWER_DOWN, 0x00, 0x00});
1313         else
1314                 rc = send_seq(priv, {0x80, XREG_POWER_DOWN, 0x00, 0x00});
1315 
1316         if (rc >= 0)
1317                 priv->state = XC2028_SLEEP;
1318 
1319         mutex_unlock(&priv->lock);
1320 
1321         return rc;
1322 }
1323 
1324 static void xc2028_dvb_release(struct dvb_frontend *fe)
1325 {
1326         struct xc2028_data *priv = fe->tuner_priv;
1327 
1328         tuner_dbg("%s called\n", __func__);
1329 
1330         mutex_lock(&xc2028_list_mutex);
1331 
1332         /* only perform final cleanup if this is the last instance */
1333         if (hybrid_tuner_report_instance_count(priv) == 1)
1334                 free_firmware(priv);
1335 
1336         if (priv)
1337                 hybrid_tuner_release_state(priv);
1338 
1339         mutex_unlock(&xc2028_list_mutex);
1340 
1341         fe->tuner_priv = NULL;
1342 }
1343 
1344 static int xc2028_get_frequency(struct dvb_frontend *fe, u32 *frequency)
1345 {
1346         struct xc2028_data *priv = fe->tuner_priv;
1347         int rc;
1348 
1349         tuner_dbg("%s called\n", __func__);
1350 
1351         rc = check_device_status(priv);
1352         if (rc < 0)
1353                 return rc;
1354 
1355         *frequency = priv->frequency;
1356 
1357         return 0;
1358 }
1359 
1360 static void load_firmware_cb(const struct firmware *fw,
1361                              void *context)
1362 {
1363         struct dvb_frontend *fe = context;
1364         struct xc2028_data *priv = fe->tuner_priv;
1365         int rc;
1366 
1367         tuner_dbg("request_firmware_nowait(): %s\n", fw ? "OK" : "error");
1368         if (!fw) {
1369                 tuner_err("Could not load firmware %s.\n", priv->fname);
1370                 priv->state = XC2028_NODEV;
1371                 return;
1372         }
1373 
1374         rc = load_all_firmwares(fe, fw);
1375 
1376         release_firmware(fw);
1377 
1378         if (rc < 0)
1379                 return;
1380         priv->state = XC2028_ACTIVE;
1381 }
1382 
1383 static int xc2028_set_config(struct dvb_frontend *fe, void *priv_cfg)
1384 {
1385         struct xc2028_data *priv = fe->tuner_priv;
1386         struct xc2028_ctrl *p    = priv_cfg;
1387         int                 rc   = 0;
1388 
1389         tuner_dbg("%s called\n", __func__);
1390 
1391         mutex_lock(&priv->lock);
1392 
1393         /*
1394          * Copy the config data.
1395          */
1396         memcpy(&priv->ctrl, p, sizeof(priv->ctrl));
1397 
1398         /*
1399          * If firmware name changed, frees firmware. As free_firmware will
1400          * reset the status to NO_FIRMWARE, this forces a new request_firmware
1401          */
1402         if (!firmware_name[0] && p->fname &&
1403             priv->fname && strcmp(p->fname, priv->fname))
1404                 free_firmware(priv);
1405 
1406         if (priv->ctrl.max_len < 9)
1407                 priv->ctrl.max_len = 13;
1408 
1409         if (priv->state == XC2028_NO_FIRMWARE) {
1410                 if (!firmware_name[0])
1411                         priv->fname = kstrdup(p->fname, GFP_KERNEL);
1412                 else
1413                         priv->fname = firmware_name;
1414 
1415                 if (!priv->fname) {
1416                         rc = -ENOMEM;
1417                         goto unlock;
1418                 }
1419 
1420                 rc = request_firmware_nowait(THIS_MODULE, 1,
1421                                              priv->fname,
1422                                              priv->i2c_props.adap->dev.parent,
1423                                              GFP_KERNEL,
1424                                              fe, load_firmware_cb);
1425                 if (rc < 0) {
1426                         tuner_err("Failed to request firmware %s\n",
1427                                   priv->fname);
1428                         priv->state = XC2028_NODEV;
1429                 } else
1430                         priv->state = XC2028_WAITING_FIRMWARE;
1431         }
1432 unlock:
1433         mutex_unlock(&priv->lock);
1434 
1435         return rc;
1436 }
1437 
1438 static const struct dvb_tuner_ops xc2028_dvb_tuner_ops = {
1439         .info = {
1440                  .name = "Xceive XC3028",
1441                  .frequency_min_hz  =  42 * MHz,
1442                  .frequency_max_hz  = 864 * MHz,
1443                  .frequency_step_hz =  50 * kHz,
1444                  },
1445 
1446         .set_config        = xc2028_set_config,
1447         .set_analog_params = xc2028_set_analog_freq,
1448         .release           = xc2028_dvb_release,
1449         .get_frequency     = xc2028_get_frequency,
1450         .get_rf_strength   = xc2028_signal,
1451         .get_afc           = xc2028_get_afc,
1452         .set_params        = xc2028_set_params,
1453         .sleep             = xc2028_sleep,
1454 };
1455 
1456 struct dvb_frontend *xc2028_attach(struct dvb_frontend *fe,
1457                                    struct xc2028_config *cfg)
1458 {
1459         struct xc2028_data *priv;
1460         int instance;
1461 
1462         if (debug)
1463                 printk(KERN_DEBUG "xc2028: Xcv2028/3028 init called!\n");
1464 
1465         if (NULL == cfg)
1466                 return NULL;
1467 
1468         if (!fe) {
1469                 printk(KERN_ERR "xc2028: No frontend!\n");
1470                 return NULL;
1471         }
1472 
1473         mutex_lock(&xc2028_list_mutex);
1474 
1475         instance = hybrid_tuner_request_state(struct xc2028_data, priv,
1476                                               hybrid_tuner_instance_list,
1477                                               cfg->i2c_adap, cfg->i2c_addr,
1478                                               "xc2028");
1479         switch (instance) {
1480         case 0:
1481                 /* memory allocation failure */
1482                 goto fail;
1483         case 1:
1484                 /* new tuner instance */
1485                 priv->ctrl.max_len = 13;
1486 
1487                 mutex_init(&priv->lock);
1488 
1489                 fe->tuner_priv = priv;
1490                 break;
1491         case 2:
1492                 /* existing tuner instance */
1493                 fe->tuner_priv = priv;
1494                 break;
1495         }
1496 
1497         memcpy(&fe->ops.tuner_ops, &xc2028_dvb_tuner_ops,
1498                sizeof(xc2028_dvb_tuner_ops));
1499 
1500         tuner_info("type set to %s\n", "XCeive xc2028/xc3028 tuner");
1501 
1502         if (cfg->ctrl)
1503                 xc2028_set_config(fe, cfg->ctrl);
1504 
1505         mutex_unlock(&xc2028_list_mutex);
1506 
1507         return fe;
1508 fail:
1509         mutex_unlock(&xc2028_list_mutex);
1510 
1511         xc2028_dvb_release(fe);
1512         return NULL;
1513 }
1514 
1515 EXPORT_SYMBOL(xc2028_attach);
1516 
1517 MODULE_DESCRIPTION("Xceive xc2028/xc3028 tuner driver");
1518 MODULE_AUTHOR("Michel Ludwig <michel.ludwig@gmail.com>");
1519 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@kernel.org>");
1520 MODULE_LICENSE("GPL v2");
1521 MODULE_FIRMWARE(XC2028_DEFAULT_FIRMWARE);
1522 MODULE_FIRMWARE(XC3028L_DEFAULT_FIRMWARE);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/media/tuners/tuner-xc2028.c

DEFINITIONS
