drivers/media/dvb/frontends/bcm3510.c

   1 /*
   2  * Support for the Broadcom BCM3510 ATSC demodulator (1st generation Air2PC)
   3  *
   4  *  Copyright (C) 2001-5, B2C2 inc.
   5  *
   6  *  GPL/Linux driver written by Patrick Boettcher <patrick.boettcher@desy.de>
   7  *
   8  *  This driver is "hard-coded" to be used with the 1st generation of
   9  *  Technisat/B2C2's Air2PC ATSC PCI/USB cards/boxes. The pll-programming
  10  *  (Panasonic CT10S) is located here, which is actually wrong. Unless there is
  11  *  another device with a BCM3510, this is no problem.
  12  *
  13  *  The driver works also with QAM64 DVB-C, but had an unreasonable high
  14  *  UNC. (Tested with the Air2PC ATSC 1st generation)
  15  *
  16  *  You'll need a firmware for this driver in order to get it running. It is
  17  *  called "dvb-fe-bcm3510-01.fw".
  18  *
  19  * This program is free software; you can redistribute it and/or modify it
  20  * under the terms of the GNU General Public License as published by the Free
  21  * Software Foundation; either version 2 of the License, or (at your option)
  22  * any later version.
  23  *
  24  * This program is distributed in the hope that it will be useful, but WITHOUT
  25  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  26  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  27  * more details.
  28  *
  29  * You should have received a copy of the GNU General Public License along with
  30  * this program; if not, write to the Free Software Foundation, Inc., 675 Mass
  31  * Ave, Cambridge, MA 02139, USA.
  32  */
  33
  34 #include <linux/init.h>
  35 #include <linux/module.h>
  36 #include <linux/moduleparam.h>
  37 #include <linux/device.h>
  38 #include <linux/firmware.h>
  39 #include <linux/jiffies.h>
  40 #include <linux/string.h>
  41 #include <linux/slab.h>
  42 #include <linux/mutex.h>
  43
  44 #include "dvb_frontend.h"
  45 #include "bcm3510.h"
  46 #include "bcm3510_priv.h"
  47
  48 struct bcm3510_state {
  49
  50         struct i2c_adapter* i2c;
  51         const struct bcm3510_config* config;
  52         struct dvb_frontend frontend;
  53
  54         /* demodulator private data */
  55         struct mutex hab_mutex;
  56         u8 firmware_loaded:1;
  57
  58         unsigned long next_status_check;
  59         unsigned long status_check_interval;
  60         struct bcm3510_hab_cmd_status1 status1;
  61         struct bcm3510_hab_cmd_status2 status2;
  62 };
  63
  64 static int debug;
  65 module_param(debug, int, 0644);
  66 MODULE_PARM_DESC(debug, "set debugging level (1=info,2=i2c (|-able)).");
  67
  68 #define dprintk(level,x...) if (level & debug) printk(x)
  69 #define dbufout(b,l,m) {\
  70             int i; \
  71             for (i = 0; i < l; i++) \
  72                 m("%02x ",b[i]); \
  73 }
  74 #define deb_info(args...) dprintk(0x01,args)
  75 #define deb_i2c(args...)  dprintk(0x02,args)
  76 #define deb_hab(args...)  dprintk(0x04,args)
  77
  78 /* transfer functions */
  79 static int bcm3510_writebytes (struct bcm3510_state *state, u8 reg, u8 *buf, u8 len)
  80 {
  81         u8 b[256];
  82         int err;
  83         struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = b, .len = len + 1 };
  84
  85         b[0] = reg;
  86         memcpy(&b[1],buf,len);
  87
  88         deb_i2c("i2c wr %02x: ",reg);
  89         dbufout(buf,len,deb_i2c);
  90         deb_i2c("\n");
  91
  92         if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
  93
  94                 deb_info("%s: i2c write error (addr %02x, reg %02x, err == %i)\n",
  95                         __FUNCTION__, state->config->demod_address, reg,  err);
  96                 return -EREMOTEIO;
  97         }
  98
  99         return 0;
 100 }
 101
 102 static int bcm3510_readbytes (struct bcm3510_state *state, u8 reg, u8 *buf, u8 len)
 103 {
 104         struct i2c_msg msg[] = {
 105                 { .addr = state->config->demod_address, .flags = 0,        .buf = &reg, .len = 1 },
 106                 { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = buf,  .len = len }
 107         };
 108         int err;
 109
 110         memset(buf,0,len);
 111
 112         if ((err = i2c_transfer (state->i2c, msg, 2)) != 2) {
 113                 deb_info("%s: i2c read error (addr %02x, reg %02x, err == %i)\n",
 114                         __FUNCTION__, state->config->demod_address, reg,  err);
 115                 return -EREMOTEIO;
 116         }
 117         deb_i2c("i2c rd %02x: ",reg);
 118         dbufout(buf,len,deb_i2c);
 119         deb_i2c("\n");
 120
 121         return 0;
 122 }
 123
 124 static int bcm3510_writeB(struct bcm3510_state *state, u8 reg, bcm3510_register_value v)
 125 {
 126         return bcm3510_writebytes(state,reg,&v.raw,1);
 127 }
 128
 129 static int bcm3510_readB(struct bcm3510_state *state, u8 reg, bcm3510_register_value *v)
 130 {
 131         return bcm3510_readbytes(state,reg,&v->raw,1);
 132 }
 133
 134 /* Host Access Buffer transfers */
 135 static int bcm3510_hab_get_response(struct bcm3510_state *st, u8 *buf, int len)
 136 {
 137         bcm3510_register_value v;
 138         int ret,i;
 139
 140         v.HABADR_a6.HABADR = 0;
 141         if ((ret = bcm3510_writeB(st,0xa6,v)) < 0)
 142                 return ret;
 143
 144         for (i = 0; i < len; i++) {
 145                 if ((ret = bcm3510_readB(st,0xa7,&v)) < 0)
 146                         return ret;
 147                 buf[i] = v.HABDATA_a7;
 148         }
 149         return 0;
 150 }
 151
 152 static int bcm3510_hab_send_request(struct bcm3510_state *st, u8 *buf, int len)
 153 {
 154         bcm3510_register_value v,hab;
 155         int ret,i;
 156         unsigned long t;
 157
 158 /* Check if any previous HAB request still needs to be serviced by the
 159  * Aquisition Processor before sending new request */
 160         if ((ret = bcm3510_readB(st,0xa8,&v)) < 0)
 161                 return ret;
 162         if (v.HABSTAT_a8.HABR) {
 163                 deb_info("HAB is running already - clearing it.\n");
 164                 v.HABSTAT_a8.HABR = 0;
 165                 bcm3510_writeB(st,0xa8,v);
 166 //              return -EBUSY;
 167         }
 168
 169 /* Send the start HAB Address (automatically incremented after write of
 170  * HABDATA) and write the HAB Data */
 171         hab.HABADR_a6.HABADR = 0;
 172         if ((ret = bcm3510_writeB(st,0xa6,hab)) < 0)
 173                 return ret;
 174
 175         for (i = 0; i < len; i++) {
 176                 hab.HABDATA_a7 = buf[i];
 177                 if ((ret = bcm3510_writeB(st,0xa7,hab)) < 0)
 178                         return ret;
 179         }
 180
 181 /* Set the HABR bit to indicate AP request in progress (LBHABR allows HABR to
 182  * be written) */
 183         v.raw = 0; v.HABSTAT_a8.HABR = 1; v.HABSTAT_a8.LDHABR = 1;
 184         if ((ret = bcm3510_writeB(st,0xa8,v)) < 0)
 185                 return ret;
 186
 187 /* Polling method: Wait until the AP finishes processing the HAB request */
 188         t = jiffies + 1*HZ;
 189         while (time_before(jiffies, t)) {
 190                 deb_info("waiting for HAB to complete\n");
 191                 msleep(10);
 192                 if ((ret = bcm3510_readB(st,0xa8,&v)) < 0)
 193                         return ret;
 194
 195                 if (!v.HABSTAT_a8.HABR)
 196                         return 0;
 197         }
 198
 199         deb_info("send_request execution timed out.\n");
 200         return -ETIMEDOUT;
 201 }
 202
 203 static int bcm3510_do_hab_cmd(struct bcm3510_state *st, u8 cmd, u8 msgid, u8 *obuf, u8 olen, u8 *ibuf, u8 ilen)
 204 {
 205         u8 ob[olen+2],ib[ilen+2];
 206         int ret = 0;
 207
 208         ob[0] = cmd;
 209         ob[1] = msgid;
 210         memcpy(&ob[2],obuf,olen);
 211
 212         deb_hab("hab snd: ");
 213         dbufout(ob,olen+2,deb_hab);
 214         deb_hab("\n");
 215
 216         if (mutex_lock_interruptible(&st->hab_mutex) < 0)
 217                 return -EAGAIN;
 218
 219         if ((ret = bcm3510_hab_send_request(st, ob, olen+2)) < 0 ||
 220                 (ret = bcm3510_hab_get_response(st, ib, ilen+2)) < 0)
 221                 goto error;
 222
 223         deb_hab("hab get: ");
 224         dbufout(ib,ilen+2,deb_hab);
 225         deb_hab("\n");
 226
 227         memcpy(ibuf,&ib[2],ilen);
 228 error:
 229         mutex_unlock(&st->hab_mutex);
 230         return ret;
 231 }
 232
 233 #if 0
 234 /* not needed, we use a semaphore to prevent HAB races */
 235 static int bcm3510_is_ap_ready(struct bcm3510_state *st)
 236 {
 237         bcm3510_register_value ap,hab;
 238         int ret;
 239
 240         if ((ret = bcm3510_readB(st,0xa8,&hab)) < 0 ||
 241                 (ret = bcm3510_readB(st,0xa2,&ap) < 0))
 242                 return ret;
 243
 244         if (ap.APSTAT1_a2.RESET || ap.APSTAT1_a2.IDLE || ap.APSTAT1_a2.STOP || hab.HABSTAT_a8.HABR) {
 245                 deb_info("AP is busy\n");
 246                 return -EBUSY;
 247         }
 248
 249         return 0;
 250 }
 251 #endif
 252
 253 static int bcm3510_bert_reset(struct bcm3510_state *st)
 254 {
 255         bcm3510_register_value b;
 256         int ret;
 257
 258         if ((ret = bcm3510_readB(st,0xfa,&b)) < 0)
 259                 return ret;
 260
 261         b.BERCTL_fa.RESYNC = 0; bcm3510_writeB(st,0xfa,b);
 262         b.BERCTL_fa.RESYNC = 1; bcm3510_writeB(st,0xfa,b);
 263         b.BERCTL_fa.RESYNC = 0; bcm3510_writeB(st,0xfa,b);
 264         b.BERCTL_fa.CNTCTL = 1; b.BERCTL_fa.BITCNT = 1; bcm3510_writeB(st,0xfa,b);
 265
 266         /* clear residual bit counter TODO  */
 267         return 0;
 268 }
 269
 270 static int bcm3510_refresh_state(struct bcm3510_state *st)
 271 {
 272         if (time_after(jiffies,st->next_status_check)) {
 273                 bcm3510_do_hab_cmd(st, CMD_STATUS, MSGID_STATUS1, NULL,0, (u8 *)&st->status1, sizeof(st->status1));
 274                 bcm3510_do_hab_cmd(st, CMD_STATUS, MSGID_STATUS2, NULL,0, (u8 *)&st->status2, sizeof(st->status2));
 275                 st->next_status_check = jiffies + (st->status_check_interval*HZ)/1000;
 276         }
 277         return 0;
 278 }
 279
 280 static int bcm3510_read_status(struct dvb_frontend *fe, fe_status_t *status)
 281 {
 282         struct bcm3510_state* st = fe->demodulator_priv;
 283         bcm3510_refresh_state(st);
 284
 285         *status = 0;
 286         if (st->status1.STATUS1.RECEIVER_LOCK)
 287                 *status |= FE_HAS_LOCK | FE_HAS_SYNC;
 288
 289         if (st->status1.STATUS1.FEC_LOCK)
 290                 *status |= FE_HAS_VITERBI;
 291
 292         if (st->status1.STATUS1.OUT_PLL_LOCK)
 293                 *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
 294
 295         if (*status & FE_HAS_LOCK)
 296                 st->status_check_interval = 1500;
 297         else /* more frequently checks if no lock has been achieved yet */
 298                 st->status_check_interval = 500;
 299
 300         deb_info("real_status: %02x\n",*status);
 301         return 0;
 302 }
 303
 304 static int bcm3510_read_ber(struct dvb_frontend* fe, u32* ber)
 305 {
 306         struct bcm3510_state* st = fe->demodulator_priv;
 307         bcm3510_refresh_state(st);
 308
 309         *ber = (st->status2.LDBER0 << 16) | (st->status2.LDBER1 << 8) | st->status2.LDBER2;
 310         return 0;
 311 }
 312
 313 static int bcm3510_read_unc(struct dvb_frontend* fe, u32* unc)
 314 {
 315         struct bcm3510_state* st = fe->demodulator_priv;
 316         bcm3510_refresh_state(st);
 317         *unc = (st->status2.LDUERC0 << 8) | st->status2.LDUERC1;
 318         return 0;
 319 }
 320
 321 static int bcm3510_read_signal_strength(struct dvb_frontend* fe, u16* strength)
 322 {
 323         struct bcm3510_state* st = fe->demodulator_priv;
 324         s32 t;
 325
 326         bcm3510_refresh_state(st);
 327         t = st->status2.SIGNAL;
 328
 329         if (t > 190)
 330                 t = 190;
 331         if (t < 90)
 332                 t = 90;
 333
 334         t -= 90;
 335         t = t * 0xff / 100;
 336         /* normalize if necessary */
 337         *strength = (t << 8) | t;
 338         return 0;
 339 }
 340
 341 static int bcm3510_read_snr(struct dvb_frontend* fe, u16* snr)
 342 {
 343         struct bcm3510_state* st = fe->demodulator_priv;
 344         bcm3510_refresh_state(st);
 345
 346         *snr = st->status1.SNR_EST0*1000 + ((st->status1.SNR_EST1*1000) >> 8);
 347         return 0;
 348 }
 349
 350 /* tuner frontend programming */
 351 static int bcm3510_tuner_cmd(struct bcm3510_state* st,u8 bc, u16 n, u8 a)
 352 {
 353         struct bcm3510_hab_cmd_tune c;
 354         memset(&c,0,sizeof(struct bcm3510_hab_cmd_tune));
 355
 356 /* I2C Mode disabled,  set 16 control / Data pairs */
 357         c.length = 0x10;
 358         c.clock_width = 0;
 359 /* CS1, CS0, DATA, CLK bits control the tuner RF_AGC_SEL pin is set to
 360  * logic high (as Configuration) */
 361         c.misc = 0x10;
 362 /* Set duration of the initial state of TUNCTL = 3.34 micro Sec */
 363         c.TUNCTL_state = 0x40;
 364
 365 /* PRESCALER DEVIDE RATIO | BC1_2_3_4; (band switch), 1stosc REFERENCE COUNTER REF_S12 and REF_S11 */
 366         c.ctl_dat[0].ctrl.size = BITS_8;
 367         c.ctl_dat[0].data      = 0x80 | bc;
 368
 369 /* Control DATA pin, 1stosc REFERENCE COUNTER REF_S10 to REF_S3 */
 370         c.ctl_dat[1].ctrl.size = BITS_8;
 371         c.ctl_dat[1].data      = 4;
 372
 373 /* set CONTROL BIT 1 to 1, 1stosc REFERENCE COUNTER REF_S2 to REF_S1 */
 374         c.ctl_dat[2].ctrl.size = BITS_3;
 375         c.ctl_dat[2].data      = 0x20;
 376
 377 /* control CS0 pin, pulse byte ? */
 378         c.ctl_dat[3].ctrl.size = BITS_3;
 379         c.ctl_dat[3].ctrl.clk_off = 1;
 380         c.ctl_dat[3].ctrl.cs0  = 1;
 381         c.ctl_dat[3].data      = 0x40;
 382
 383 /* PGM_S18 to PGM_S11 */
 384         c.ctl_dat[4].ctrl.size = BITS_8;
 385         c.ctl_dat[4].data      = n >> 3;
 386
 387 /* PGM_S10 to PGM_S8, SWL_S7 to SWL_S3 */
 388         c.ctl_dat[5].ctrl.size = BITS_8;
 389         c.ctl_dat[5].data      = ((n & 0x7) << 5) | (a >> 2);
 390
 391 /* SWL_S2 and SWL_S1, set CONTROL BIT 2 to 0 */
 392         c.ctl_dat[6].ctrl.size = BITS_3;
 393         c.ctl_dat[6].data      = (a << 6) & 0xdf;
 394
 395 /* control CS0 pin, pulse byte ? */
 396         c.ctl_dat[7].ctrl.size = BITS_3;
 397         c.ctl_dat[7].ctrl.clk_off = 1;
 398         c.ctl_dat[7].ctrl.cs0  = 1;
 399         c.ctl_dat[7].data      = 0x40;
 400
 401 /* PRESCALER DEVIDE RATIO, 2ndosc REFERENCE COUNTER REF_S12 and REF_S11 */
 402         c.ctl_dat[8].ctrl.size = BITS_8;
 403         c.ctl_dat[8].data      = 0x80;
 404
 405 /* 2ndosc REFERENCE COUNTER REF_S10 to REF_S3 */
 406         c.ctl_dat[9].ctrl.size = BITS_8;
 407         c.ctl_dat[9].data      = 0x10;
 408
 409 /* set CONTROL BIT 1 to 1, 2ndosc REFERENCE COUNTER REF_S2 to REF_S1 */
 410         c.ctl_dat[10].ctrl.size = BITS_3;
 411         c.ctl_dat[10].data      = 0x20;
 412
 413 /* pulse byte */
 414         c.ctl_dat[11].ctrl.size = BITS_3;
 415         c.ctl_dat[11].ctrl.clk_off = 1;
 416         c.ctl_dat[11].ctrl.cs1  = 1;
 417         c.ctl_dat[11].data      = 0x40;
 418
 419 /* PGM_S18 to PGM_S11 */
 420         c.ctl_dat[12].ctrl.size = BITS_8;
 421         c.ctl_dat[12].data      = 0x2a;
 422
 423 /* PGM_S10 to PGM_S8 and SWL_S7 to SWL_S3 */
 424         c.ctl_dat[13].ctrl.size = BITS_8;
 425         c.ctl_dat[13].data      = 0x8e;
 426
 427 /* SWL_S2 and SWL_S1 and set CONTROL BIT 2 to 0 */
 428         c.ctl_dat[14].ctrl.size = BITS_3;
 429         c.ctl_dat[14].data      = 0;
 430
 431 /* Pulse Byte */
 432         c.ctl_dat[15].ctrl.size = BITS_3;
 433         c.ctl_dat[15].ctrl.clk_off = 1;
 434         c.ctl_dat[15].ctrl.cs1  = 1;
 435         c.ctl_dat[15].data      = 0x40;
 436
 437         return bcm3510_do_hab_cmd(st,CMD_TUNE, MSGID_TUNE,(u8 *) &c,sizeof(c), NULL, 0);
 438 }
 439
 440 static int bcm3510_set_freq(struct bcm3510_state* st,u32 freq)
 441 {
 442         u8 bc,a;
 443         u16 n;
 444         s32 YIntercept,Tfvco1;
 445
 446         freq /= 1000;
 447
 448         deb_info("%dkHz:",freq);
 449         /* set Band Switch */
 450         if (freq <= 168000)
 451                 bc = 0x1c;
 452         else if (freq <= 378000)
 453                 bc = 0x2c;
 454         else
 455                 bc = 0x30;
 456
 457         if (freq >= 470000) {
 458                 freq -= 470001;
 459                 YIntercept = 18805;
 460         } else if (freq >= 90000) {
 461                 freq -= 90001;
 462                 YIntercept = 15005;
 463         } else if (freq >= 76000){
 464                 freq -= 76001;
 465                 YIntercept = 14865;
 466         } else {
 467                 freq -= 54001;
 468                 YIntercept = 14645;
 469         }
 470
 471         Tfvco1 = (((freq/6000)*60 + YIntercept)*4)/10;
 472
 473         n = Tfvco1 >> 6;
 474         a = Tfvco1 & 0x3f;
 475
 476         deb_info(" BC1_2_3_4: %x, N: %x A: %x\n", bc, n, a);
 477         if (n >= 16 && n <= 2047)
 478                 return bcm3510_tuner_cmd(st,bc,n,a);
 479
 480         return -EINVAL;
 481 }
 482
 483 static int bcm3510_set_frontend(struct dvb_frontend* fe,
 484                                              struct dvb_frontend_parameters *p)
 485 {
 486         struct bcm3510_state* st = fe->demodulator_priv;
 487         struct bcm3510_hab_cmd_ext_acquire cmd;
 488         struct bcm3510_hab_cmd_bert_control bert;
 489         int ret;
 490
 491         memset(&cmd,0,sizeof(cmd));
 492         switch (p->u.vsb.modulation) {
 493                 case QAM_256:
 494                         cmd.ACQUIRE0.MODE = 0x1;
 495                         cmd.ACQUIRE1.SYM_RATE = 0x1;
 496                         cmd.ACQUIRE1.IF_FREQ = 0x1;
 497                         break;
 498                 case QAM_64:
 499                         cmd.ACQUIRE0.MODE = 0x2;
 500                         cmd.ACQUIRE1.SYM_RATE = 0x2;
 501                         cmd.ACQUIRE1.IF_FREQ = 0x1;
 502                         break;
 503 /*              case QAM_256:
 504                         cmd.ACQUIRE0.MODE = 0x3;
 505                         break;
 506                 case QAM_128:
 507                         cmd.ACQUIRE0.MODE = 0x4;
 508                         break;
 509                 case QAM_64:
 510                         cmd.ACQUIRE0.MODE = 0x5;
 511                         break;
 512                 case QAM_32:
 513                         cmd.ACQUIRE0.MODE = 0x6;
 514                         break;
 515                 case QAM_16:
 516                         cmd.ACQUIRE0.MODE = 0x7;
 517                         break;*/
 518                 case VSB_8:
 519                         cmd.ACQUIRE0.MODE = 0x8;
 520                         cmd.ACQUIRE1.SYM_RATE = 0x0;
 521                         cmd.ACQUIRE1.IF_FREQ = 0x0;
 522                         break;
 523                 case VSB_16:
 524                         cmd.ACQUIRE0.MODE = 0x9;
 525                         cmd.ACQUIRE1.SYM_RATE = 0x0;
 526                         cmd.ACQUIRE1.IF_FREQ = 0x0;
 527                 default:
 528                         return -EINVAL;
 529         };
 530         cmd.ACQUIRE0.OFFSET = 0;
 531         cmd.ACQUIRE0.NTSCSWEEP = 1;
 532         cmd.ACQUIRE0.FA = 1;
 533         cmd.ACQUIRE0.BW = 0;
 534
 535 /*      if (enableOffset) {
 536                 cmd.IF_OFFSET0 = xx;
 537                 cmd.IF_OFFSET1 = xx;
 538
 539                 cmd.SYM_OFFSET0 = xx;
 540                 cmd.SYM_OFFSET1 = xx;
 541                 if (enableNtscSweep) {
 542                         cmd.NTSC_OFFSET0;
 543                         cmd.NTSC_OFFSET1;
 544                 }
 545         } */
 546         bcm3510_do_hab_cmd(st, CMD_ACQUIRE, MSGID_EXT_TUNER_ACQUIRE, (u8 *) &cmd, sizeof(cmd), NULL, 0);
 547
 548 /* doing it with different MSGIDs, data book and source differs */
 549         bert.BE = 0;
 550         bert.unused = 0;
 551         bcm3510_do_hab_cmd(st, CMD_STATE_CONTROL, MSGID_BERT_CONTROL, (u8 *) &bert, sizeof(bert), NULL, 0);
 552         bcm3510_do_hab_cmd(st, CMD_STATE_CONTROL, MSGID_BERT_SET, (u8 *) &bert, sizeof(bert), NULL, 0);
 553
 554         bcm3510_bert_reset(st);
 555
 556         if ((ret = bcm3510_set_freq(st,p->frequency)) < 0)
 557                 return ret;
 558
 559         memset(&st->status1,0,sizeof(st->status1));
 560         memset(&st->status2,0,sizeof(st->status2));
 561         st->status_check_interval = 500;
 562
 563 /* Give the AP some time */
 564         msleep(200);
 565
 566         return 0;
 567 }
 568
 569 static int bcm3510_sleep(struct dvb_frontend* fe)
 570 {
 571         return 0;
 572 }
 573
 574 static int bcm3510_get_tune_settings(struct dvb_frontend *fe, struct dvb_frontend_tune_settings *s)
 575 {
 576         s->min_delay_ms = 1000;
 577         s->step_size = 0;
 578         s->max_drift = 0;
 579         return 0;
 580 }
 581
 582 static void bcm3510_release(struct dvb_frontend* fe)
 583 {
 584         struct bcm3510_state* state = fe->demodulator_priv;
 585         kfree(state);
 586 }
 587
 588 /* firmware download:
 589  * firmware file is build up like this:
 590  * 16bit addr, 16bit length, 8byte of length
 591  */
 592 #define BCM3510_DEFAULT_FIRMWARE "dvb-fe-bcm3510-01.fw"
 593
 594 static int bcm3510_write_ram(struct bcm3510_state *st, u16 addr, u8 *b, u16 len)
 595 {
 596         int ret = 0,i;
 597         bcm3510_register_value vH, vL,vD;
 598
 599         vH.MADRH_a9 = addr >> 8;
 600         vL.MADRL_aa = addr;
 601         if ((ret = bcm3510_writeB(st,0xa9,vH)) < 0) return ret;
 602         if ((ret = bcm3510_writeB(st,0xaa,vL)) < 0) return ret;
 603
 604         for (i = 0; i < len; i++) {
 605                 vD.MDATA_ab = b[i];
 606                 if ((ret = bcm3510_writeB(st,0xab,vD)) < 0)
 607                         return ret;
 608         }
 609
 610         return 0;
 611 }
 612
 613 static int bcm3510_download_firmware(struct dvb_frontend* fe)
 614 {
 615         struct bcm3510_state* st = fe->demodulator_priv;
 616         const struct firmware *fw;
 617         u16 addr,len;
 618         u8  *b;
 619         int ret,i;
 620
 621         deb_info("requesting firmware\n");
 622         if ((ret = st->config->request_firmware(fe, &fw, BCM3510_DEFAULT_FIRMWARE)) < 0) {
 623                 err("could not load firmware (%s): %d",BCM3510_DEFAULT_FIRMWARE,ret);
 624                 return ret;
 625         }
 626         deb_info("got firmware: %zd\n",fw->size);
 627
 628         b = fw->data;
 629         for (i = 0; i < fw->size;) {
 630                 addr = le16_to_cpu( *( (u16 *)&b[i] ) );
 631                 len  = le16_to_cpu( *( (u16 *)&b[i+2] ) );
 632                 deb_info("firmware chunk, addr: 0x%04x, len: 0x%04x, total length: 0x%04zx\n",addr,len,fw->size);
 633                 if ((ret = bcm3510_write_ram(st,addr,&b[i+4],len)) < 0) {
 634                         err("firmware download failed: %d\n",ret);
 635                         return ret;
 636                 }
 637                 i += 4 + len;
 638         }
 639         release_firmware(fw);
 640         deb_info("firmware download successfully completed\n");
 641         return 0;
 642 }
 643
 644 static int bcm3510_check_firmware_version(struct bcm3510_state *st)
 645 {
 646         struct bcm3510_hab_cmd_get_version_info ver;
 647         bcm3510_do_hab_cmd(st,CMD_GET_VERSION_INFO,MSGID_GET_VERSION_INFO,NULL,0,(u8*)&ver,sizeof(ver));
 648
 649         deb_info("Version information: 0x%02x 0x%02x 0x%02x 0x%02x\n",
 650                 ver.microcode_version, ver.script_version, ver.config_version, ver.demod_version);
 651
 652         if (ver.script_version == BCM3510_DEF_SCRIPT_VERSION &&
 653                 ver.config_version == BCM3510_DEF_CONFIG_VERSION &&
 654                 ver.demod_version  == BCM3510_DEF_DEMOD_VERSION)
 655                 return 0;
 656
 657         deb_info("version check failed\n");
 658         return -ENODEV;
 659 }
 660
 661 /* (un)resetting the AP */
 662 static int bcm3510_reset(struct bcm3510_state *st)
 663 {
 664         int ret;
 665         unsigned long  t;
 666         bcm3510_register_value v;
 667
 668         bcm3510_readB(st,0xa0,&v); v.HCTL1_a0.RESET = 1;
 669         if ((ret = bcm3510_writeB(st,0xa0,v)) < 0)
 670                 return ret;
 671
 672     t = jiffies + 3*HZ;
 673         while (time_before(jiffies, t)) {
 674                 msleep(10);
 675                 if ((ret = bcm3510_readB(st,0xa2,&v)) < 0)
 676                         return ret;
 677
 678                 if (v.APSTAT1_a2.RESET)
 679                         return 0;
 680         }
 681         deb_info("reset timed out\n");
 682         return -ETIMEDOUT;
 683 }
 684
 685 static int bcm3510_clear_reset(struct bcm3510_state *st)
 686 {
 687         bcm3510_register_value v;
 688         int ret;
 689         unsigned long t;
 690
 691         v.raw = 0;
 692         if ((ret = bcm3510_writeB(st,0xa0,v)) < 0)
 693                 return ret;
 694
 695     t = jiffies + 3*HZ;
 696         while (time_before(jiffies, t)) {
 697                 msleep(10);
 698                 if ((ret = bcm3510_readB(st,0xa2,&v)) < 0)
 699                         return ret;
 700
 701                 /* verify that reset is cleared */
 702                 if (!v.APSTAT1_a2.RESET)
 703                         return 0;
 704         }
 705         deb_info("reset clear timed out\n");
 706         return -ETIMEDOUT;
 707 }
 708
 709 static int bcm3510_init_cold(struct bcm3510_state *st)
 710 {
 711         int ret;
 712         bcm3510_register_value v;
 713
 714         /* read Acquisation Processor status register and check it is not in RUN mode */
 715         if ((ret = bcm3510_readB(st,0xa2,&v)) < 0)
 716                 return ret;
 717         if (v.APSTAT1_a2.RUN) {
 718                 deb_info("AP is already running - firmware already loaded.\n");
 719                 return 0;
 720         }
 721
 722         deb_info("reset?\n");
 723         if ((ret = bcm3510_reset(st)) < 0)
 724                 return ret;
 725
 726         deb_info("tristate?\n");
 727         /* tri-state */
 728         v.TSTCTL_2e.CTL = 0;
 729         if ((ret = bcm3510_writeB(st,0x2e,v)) < 0)
 730                 return ret;
 731
 732         deb_info("firmware?\n");
 733         if ((ret = bcm3510_download_firmware(&st->frontend)) < 0 ||
 734                 (ret = bcm3510_clear_reset(st)) < 0)
 735                 return ret;
 736
 737         /* anything left here to Let the acquisition processor begin execution at program counter 0000 ??? */
 738
 739         return 0;
 740 }
 741
 742 static int bcm3510_init(struct dvb_frontend* fe)
 743 {
 744         struct bcm3510_state* st = fe->demodulator_priv;
 745         bcm3510_register_value j;
 746         struct bcm3510_hab_cmd_set_agc c;
 747         int ret;
 748
 749         if ((ret = bcm3510_readB(st,0xca,&j)) < 0)
 750                 return ret;
 751
 752         deb_info("JDEC: %02x\n",j.raw);
 753
 754         switch (j.JDEC_ca.JDEC) {
 755                 case JDEC_WAIT_AT_RAM:
 756                         deb_info("attempting to download firmware\n");
 757                         if ((ret = bcm3510_init_cold(st)) < 0)
 758                                 return ret;
 759                 case JDEC_EEPROM_LOAD_WAIT: /* fall-through is wanted */
 760                         deb_info("firmware is loaded\n");
 761                         bcm3510_check_firmware_version(st);
 762                         break;
 763                 default:
 764                         return -ENODEV;
 765         }
 766
 767         memset(&c,0,1);
 768         c.SEL = 1;
 769         bcm3510_do_hab_cmd(st,CMD_AUTO_PARAM,MSGID_SET_RF_AGC_SEL,(u8 *)&c,sizeof(c),NULL,0);
 770
 771         return 0;
 772 }
 773
 774
 775 static struct dvb_frontend_ops bcm3510_ops;
 776
 777 struct dvb_frontend* bcm3510_attach(const struct bcm3510_config *config,
 778                                    struct i2c_adapter *i2c)
 779 {
 780         struct bcm3510_state* state = NULL;
 781         int ret;
 782         bcm3510_register_value v;
 783
 784         /* allocate memory for the internal state */
 785         state = kzalloc(sizeof(struct bcm3510_state), GFP_KERNEL);
 786         if (state == NULL)
 787                 goto error;
 788
 789         /* setup the state */
 790
 791         state->config = config;
 792         state->i2c = i2c;
 793
 794         /* create dvb_frontend */
 795         memcpy(&state->frontend.ops, &bcm3510_ops, sizeof(struct dvb_frontend_ops));
 796         state->frontend.demodulator_priv = state;
 797
 798         mutex_init(&state->hab_mutex);
 799
 800         if ((ret = bcm3510_readB(state,0xe0,&v)) < 0)
 801                 goto error;
 802
 803         deb_info("Revision: 0x%1x, Layer: 0x%1x.\n",v.REVID_e0.REV,v.REVID_e0.LAYER);
 804
 805         if ((v.REVID_e0.REV != 0x1 && v.REVID_e0.LAYER != 0xb) && /* cold */
 806                 (v.REVID_e0.REV != 0x8 && v.REVID_e0.LAYER != 0x0))   /* warm */
 807                 goto error;
 808
 809         info("Revision: 0x%1x, Layer: 0x%1x.",v.REVID_e0.REV,v.REVID_e0.LAYER);
 810
 811         bcm3510_reset(state);
 812
 813         return &state->frontend;
 814
 815 error:
 816         kfree(state);
 817         return NULL;
 818 }
 819 EXPORT_SYMBOL(bcm3510_attach);
 820
 821 static struct dvb_frontend_ops bcm3510_ops = {
 822
 823         .info = {
 824                 .name = "Broadcom BCM3510 VSB/QAM frontend",
 825                 .type = FE_ATSC,
 826                 .frequency_min =  54000000,
 827                 .frequency_max = 803000000,
 828                 /* stepsize is just a guess */
 829                 .frequency_stepsize = 0,
 830                 .caps =
 831                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 832                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 833                         FE_CAN_8VSB | FE_CAN_16VSB |
 834                         FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_128 | FE_CAN_QAM_256
 835         },
 836
 837         .release = bcm3510_release,
 838
 839         .init = bcm3510_init,
 840         .sleep = bcm3510_sleep,
 841
 842         .set_frontend = bcm3510_set_frontend,
 843         .get_tune_settings = bcm3510_get_tune_settings,
 844
 845         .read_status = bcm3510_read_status,
 846         .read_ber = bcm3510_read_ber,
 847         .read_signal_strength = bcm3510_read_signal_strength,
 848         .read_snr = bcm3510_read_snr,
 849         .read_ucblocks = bcm3510_read_unc,
 850 };
 851
 852 MODULE_DESCRIPTION("Broadcom BCM3510 ATSC (8VSB/16VSB & ITU J83 AnnexB FEC QAM64/256) demodulator driver");
 853 MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
 854 MODULE_LICENSE("GPL");