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