drivers/media/dvb-frontends/tda10048.c

   1 /*
   2     NXP TDA10048HN DVB OFDM demodulator driver
   3
   4     Copyright (C) 2009 Steven Toth <[email protected]>
   5
   6     This program is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     This program is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with this program; if not, write to the Free Software
  18     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19
  20 */
  21
  22 #include <linux/kernel.h>
  23 #include <linux/init.h>
  24 #include <linux/module.h>
  25 #include <linux/string.h>
  26 #include <linux/slab.h>
  27 #include <linux/delay.h>
  28 #include <linux/math64.h>
  29 #include <asm/div64.h>
  30 #include "dvb_frontend.h"
  31 #include "dvb_math.h"
  32 #include "tda10048.h"
  33
  34 #define TDA10048_DEFAULT_FIRMWARE "dvb-fe-tda10048-1.0.fw"
  35 #define TDA10048_DEFAULT_FIRMWARE_SIZE 24878
  36
  37 /* Register name definitions */
  38 #define TDA10048_IDENTITY          0x00
  39 #define TDA10048_VERSION           0x01
  40 #define TDA10048_DSP_CODE_CPT      0x0C
  41 #define TDA10048_DSP_CODE_IN       0x0E
  42 #define TDA10048_IN_CONF1          0x10
  43 #define TDA10048_IN_CONF2          0x11
  44 #define TDA10048_IN_CONF3          0x12
  45 #define TDA10048_OUT_CONF1         0x14
  46 #define TDA10048_OUT_CONF2         0x15
  47 #define TDA10048_OUT_CONF3         0x16
  48 #define TDA10048_AUTO              0x18
  49 #define TDA10048_SYNC_STATUS       0x1A
  50 #define TDA10048_CONF_C4_1         0x1E
  51 #define TDA10048_CONF_C4_2         0x1F
  52 #define TDA10048_CODE_IN_RAM       0x20
  53 #define TDA10048_CHANNEL_INFO1_R   0x22
  54 #define TDA10048_CHANNEL_INFO2_R   0x23
  55 #define TDA10048_CHANNEL_INFO1     0x24
  56 #define TDA10048_CHANNEL_INFO2     0x25
  57 #define TDA10048_TIME_ERROR_R      0x26
  58 #define TDA10048_TIME_ERROR        0x27
  59 #define TDA10048_FREQ_ERROR_LSB_R  0x28
  60 #define TDA10048_FREQ_ERROR_MSB_R  0x29
  61 #define TDA10048_FREQ_ERROR_LSB    0x2A
  62 #define TDA10048_FREQ_ERROR_MSB    0x2B
  63 #define TDA10048_IT_SEL            0x30
  64 #define TDA10048_IT_STAT           0x32
  65 #define TDA10048_DSP_AD_LSB        0x3C
  66 #define TDA10048_DSP_AD_MSB        0x3D
  67 #define TDA10048_DSP_REG_LSB       0x3E
  68 #define TDA10048_DSP_REG_MSB       0x3F
  69 #define TDA10048_CONF_TRISTATE1    0x44
  70 #define TDA10048_CONF_TRISTATE2    0x45
  71 #define TDA10048_CONF_POLARITY     0x46
  72 #define TDA10048_GPIO_SP_DS0       0x48
  73 #define TDA10048_GPIO_SP_DS1       0x49
  74 #define TDA10048_GPIO_SP_DS2       0x4A
  75 #define TDA10048_GPIO_SP_DS3       0x4B
  76 #define TDA10048_GPIO_OUT_SEL      0x4C
  77 #define TDA10048_GPIO_SELECT       0x4D
  78 #define TDA10048_IC_MODE           0x4E
  79 #define TDA10048_CONF_XO           0x50
  80 #define TDA10048_CONF_PLL1         0x51
  81 #define TDA10048_CONF_PLL2         0x52
  82 #define TDA10048_CONF_PLL3         0x53
  83 #define TDA10048_CONF_ADC          0x54
  84 #define TDA10048_CONF_ADC_2        0x55
  85 #define TDA10048_CONF_C1_1         0x60
  86 #define TDA10048_CONF_C1_3         0x62
  87 #define TDA10048_AGC_CONF          0x70
  88 #define TDA10048_AGC_THRESHOLD_LSB 0x72
  89 #define TDA10048_AGC_THRESHOLD_MSB 0x73
  90 #define TDA10048_AGC_RENORM        0x74
  91 #define TDA10048_AGC_GAINS         0x76
  92 #define TDA10048_AGC_TUN_MIN       0x78
  93 #define TDA10048_AGC_TUN_MAX       0x79
  94 #define TDA10048_AGC_IF_MIN        0x7A
  95 #define TDA10048_AGC_IF_MAX        0x7B
  96 #define TDA10048_AGC_TUN_LEVEL     0x7E
  97 #define TDA10048_AGC_IF_LEVEL      0x7F
  98 #define TDA10048_DIG_AGC_LEVEL     0x81
  99 #define TDA10048_FREQ_PHY2_LSB     0x86
 100 #define TDA10048_FREQ_PHY2_MSB     0x87
 101 #define TDA10048_TIME_INVWREF_LSB  0x88
 102 #define TDA10048_TIME_INVWREF_MSB  0x89
 103 #define TDA10048_TIME_WREF_LSB     0x8A
 104 #define TDA10048_TIME_WREF_MID1    0x8B
 105 #define TDA10048_TIME_WREF_MID2    0x8C
 106 #define TDA10048_TIME_WREF_MSB     0x8D
 107 #define TDA10048_NP_OUT            0xA2
 108 #define TDA10048_CELL_ID_LSB       0xA4
 109 #define TDA10048_CELL_ID_MSB       0xA5
 110 #define TDA10048_EXTTPS_ODD        0xAA
 111 #define TDA10048_EXTTPS_EVEN       0xAB
 112 #define TDA10048_TPS_LENGTH        0xAC
 113 #define TDA10048_FREE_REG_1        0xB2
 114 #define TDA10048_FREE_REG_2        0xB3
 115 #define TDA10048_CONF_C3_1         0xC0
 116 #define TDA10048_CVBER_CTRL        0xC2
 117 #define TDA10048_CBER_NMAX_LSB     0xC4
 118 #define TDA10048_CBER_NMAX_MSB     0xC5
 119 #define TDA10048_CBER_LSB          0xC6
 120 #define TDA10048_CBER_MSB          0xC7
 121 #define TDA10048_VBER_LSB          0xC8
 122 #define TDA10048_VBER_MID          0xC9
 123 #define TDA10048_VBER_MSB          0xCA
 124 #define TDA10048_CVBER_LUT         0xCC
 125 #define TDA10048_UNCOR_CTRL        0xCD
 126 #define TDA10048_UNCOR_CPT_LSB     0xCE
 127 #define TDA10048_UNCOR_CPT_MSB     0xCF
 128 #define TDA10048_SOFT_IT_C3        0xD6
 129 #define TDA10048_CONF_TS2          0xE0
 130 #define TDA10048_CONF_TS1          0xE1
 131
 132 static unsigned int debug;
 133
 134 #define dprintk(level, fmt, arg...)\
 135         do { if (debug >= level)\
 136                 printk(KERN_DEBUG "tda10048: " fmt, ## arg);\
 137         } while (0)
 138
 139 struct tda10048_state {
 140
 141         struct i2c_adapter *i2c;
 142
 143         /* We'll cache and update the attach config settings */
 144         struct tda10048_config config;
 145         struct dvb_frontend frontend;
 146
 147         int fwloaded;
 148
 149         u32 freq_if_hz;
 150         u32 xtal_hz;
 151         u32 pll_mfactor;
 152         u32 pll_nfactor;
 153         u32 pll_pfactor;
 154         u32 sample_freq;
 155
 156         u32 bandwidth;
 157 };
 158
 159 static struct init_tab {
 160         u8      reg;
 161         u16     data;
 162 } init_tab[] = {
 163         { TDA10048_CONF_PLL1, 0x08 },
 164         { TDA10048_CONF_ADC_2, 0x00 },
 165         { TDA10048_CONF_C4_1, 0x00 },
 166         { TDA10048_CONF_PLL1, 0x0f },
 167         { TDA10048_CONF_PLL2, 0x0a },
 168         { TDA10048_CONF_PLL3, 0x43 },
 169         { TDA10048_FREQ_PHY2_LSB, 0x02 },
 170         { TDA10048_FREQ_PHY2_MSB, 0x0a },
 171         { TDA10048_TIME_WREF_LSB, 0xbd },
 172         { TDA10048_TIME_WREF_MID1, 0xe4 },
 173         { TDA10048_TIME_WREF_MID2, 0xa8 },
 174         { TDA10048_TIME_WREF_MSB, 0x02 },
 175         { TDA10048_TIME_INVWREF_LSB, 0x04 },
 176         { TDA10048_TIME_INVWREF_MSB, 0x06 },
 177         { TDA10048_CONF_C4_1, 0x00 },
 178         { TDA10048_CONF_C1_1, 0xa8 },
 179         { TDA10048_AGC_CONF, 0x16 },
 180         { TDA10048_CONF_C1_3, 0x0b },
 181         { TDA10048_AGC_TUN_MIN, 0x00 },
 182         { TDA10048_AGC_TUN_MAX, 0xff },
 183         { TDA10048_AGC_IF_MIN, 0x00 },
 184         { TDA10048_AGC_IF_MAX, 0xff },
 185         { TDA10048_AGC_THRESHOLD_MSB, 0x00 },
 186         { TDA10048_AGC_THRESHOLD_LSB, 0x70 },
 187         { TDA10048_CVBER_CTRL, 0x38 },
 188         { TDA10048_AGC_GAINS, 0x12 },
 189         { TDA10048_CONF_XO, 0x00 },
 190         { TDA10048_CONF_TS1, 0x07 },
 191         { TDA10048_IC_MODE, 0x00 },
 192         { TDA10048_CONF_TS2, 0xc0 },
 193         { TDA10048_CONF_TRISTATE1, 0x21 },
 194         { TDA10048_CONF_TRISTATE2, 0x00 },
 195         { TDA10048_CONF_POLARITY, 0x00 },
 196         { TDA10048_CONF_C4_2, 0x04 },
 197         { TDA10048_CONF_ADC, 0x60 },
 198         { TDA10048_CONF_ADC_2, 0x10 },
 199         { TDA10048_CONF_ADC, 0x60 },
 200         { TDA10048_CONF_ADC_2, 0x00 },
 201         { TDA10048_CONF_C1_1, 0xa8 },
 202         { TDA10048_UNCOR_CTRL, 0x00 },
 203         { TDA10048_CONF_C4_2, 0x04 },
 204 };
 205
 206 static struct pll_tab {
 207         u32     clk_freq_khz;
 208         u32     if_freq_khz;
 209 } pll_tab[] = {
 210         { TDA10048_CLK_4000,  TDA10048_IF_36130 },
 211         { TDA10048_CLK_16000, TDA10048_IF_3300 },
 212         { TDA10048_CLK_16000, TDA10048_IF_3500 },
 213         { TDA10048_CLK_16000, TDA10048_IF_3800 },
 214         { TDA10048_CLK_16000, TDA10048_IF_4000 },
 215         { TDA10048_CLK_16000, TDA10048_IF_4300 },
 216         { TDA10048_CLK_16000, TDA10048_IF_4500 },
 217         { TDA10048_CLK_16000, TDA10048_IF_5000 },
 218         { TDA10048_CLK_16000, TDA10048_IF_36130 },
 219 };
 220
 221 static int tda10048_writereg(struct tda10048_state *state, u8 reg, u8 data)
 222 {
 223         struct tda10048_config *config = &state->config;
 224         int ret;
 225         u8 buf[] = { reg, data };
 226         struct i2c_msg msg = {
 227                 .addr = config->demod_address,
 228                 .flags = 0, .buf = buf, .len = 2 };
 229
 230         dprintk(2, "%s(reg = 0x%02x, data = 0x%02x)\n", __func__, reg, data);
 231
 232         ret = i2c_transfer(state->i2c, &msg, 1);
 233
 234         if (ret != 1)
 235                 printk("%s: writereg error (ret == %i)\n", __func__, ret);
 236
 237         return (ret != 1) ? -1 : 0;
 238 }
 239
 240 static u8 tda10048_readreg(struct tda10048_state *state, u8 reg)
 241 {
 242         struct tda10048_config *config = &state->config;
 243         int ret;
 244         u8 b0[] = { reg };
 245         u8 b1[] = { 0 };
 246         struct i2c_msg msg[] = {
 247                 { .addr = config->demod_address,
 248                         .flags = 0, .buf = b0, .len = 1 },
 249                 { .addr = config->demod_address,
 250                         .flags = I2C_M_RD, .buf = b1, .len = 1 } };
 251
 252         dprintk(2, "%s(reg = 0x%02x)\n", __func__, reg);
 253
 254         ret = i2c_transfer(state->i2c, msg, 2);
 255
 256         if (ret != 2)
 257                 printk(KERN_ERR "%s: readreg error (ret == %i)\n",
 258                         __func__, ret);
 259
 260         return b1[0];
 261 }
 262
 263 static int tda10048_writeregbulk(struct tda10048_state *state, u8 reg,
 264                                  const u8 *data, u16 len)
 265 {
 266         struct tda10048_config *config = &state->config;
 267         int ret = -EREMOTEIO;
 268         struct i2c_msg msg;
 269         u8 *buf;
 270
 271         dprintk(2, "%s(%d, ?, len = %d)\n", __func__, reg, len);
 272
 273         buf = kmalloc(len + 1, GFP_KERNEL);
 274         if (buf == NULL) {
 275                 ret = -ENOMEM;
 276                 goto error;
 277         }
 278
 279         *buf = reg;
 280         memcpy(buf + 1, data, len);
 281
 282         msg.addr = config->demod_address;
 283         msg.flags = 0;
 284         msg.buf = buf;
 285         msg.len = len + 1;
 286
 287         dprintk(2, "%s():  write len = %d\n",
 288                 __func__, msg.len);
 289
 290         ret = i2c_transfer(state->i2c, &msg, 1);
 291         if (ret != 1) {
 292                 printk(KERN_ERR "%s(): writereg error err %i\n",
 293                          __func__, ret);
 294                 ret = -EREMOTEIO;
 295         }
 296
 297 error:
 298         kfree(buf);
 299
 300         return ret;
 301 }
 302
 303 static int tda10048_set_phy2(struct dvb_frontend *fe, u32 sample_freq_hz,
 304                              u32 if_hz)
 305 {
 306         struct tda10048_state *state = fe->demodulator_priv;
 307         u64 t;
 308
 309         dprintk(1, "%s()\n", __func__);
 310
 311         if (sample_freq_hz == 0)
 312                 return -EINVAL;
 313
 314         if (if_hz < (sample_freq_hz / 2)) {
 315                 /* PHY2 = (if2/fs) * 2^15 */
 316                 t = if_hz;
 317                 t *= 10;
 318                 t *= 32768;
 319                 do_div(t, sample_freq_hz);
 320                 t += 5;
 321                 do_div(t, 10);
 322         } else {
 323                 /* PHY2 = ((IF1-fs)/fs) * 2^15 */
 324                 t = sample_freq_hz - if_hz;
 325                 t *= 10;
 326                 t *= 32768;
 327                 do_div(t, sample_freq_hz);
 328                 t += 5;
 329                 do_div(t, 10);
 330                 t = ~t + 1;
 331         }
 332
 333         tda10048_writereg(state, TDA10048_FREQ_PHY2_LSB, (u8)t);
 334         tda10048_writereg(state, TDA10048_FREQ_PHY2_MSB, (u8)(t >> 8));
 335
 336         return 0;
 337 }
 338
 339 static int tda10048_set_wref(struct dvb_frontend *fe, u32 sample_freq_hz,
 340                              u32 bw)
 341 {
 342         struct tda10048_state *state = fe->demodulator_priv;
 343         u64 t, z;
 344
 345         dprintk(1, "%s()\n", __func__);
 346
 347         if (sample_freq_hz == 0)
 348                 return -EINVAL;
 349
 350         /* WREF = (B / (7 * fs)) * 2^31 */
 351         t = bw * 10;
 352         /* avoid warning: this decimal constant is unsigned only in ISO C90 */
 353         /* t *= 2147483648 on 32bit platforms */
 354         t *= (2048 * 1024);
 355         t *= 1024;
 356         z = 7 * sample_freq_hz;
 357         do_div(t, z);
 358         t += 5;
 359         do_div(t, 10);
 360
 361         tda10048_writereg(state, TDA10048_TIME_WREF_LSB, (u8)t);
 362         tda10048_writereg(state, TDA10048_TIME_WREF_MID1, (u8)(t >> 8));
 363         tda10048_writereg(state, TDA10048_TIME_WREF_MID2, (u8)(t >> 16));
 364         tda10048_writereg(state, TDA10048_TIME_WREF_MSB, (u8)(t >> 24));
 365
 366         return 0;
 367 }
 368
 369 static int tda10048_set_invwref(struct dvb_frontend *fe, u32 sample_freq_hz,
 370                                 u32 bw)
 371 {
 372         struct tda10048_state *state = fe->demodulator_priv;
 373         u64 t;
 374
 375         dprintk(1, "%s()\n", __func__);
 376
 377         if (sample_freq_hz == 0)
 378                 return -EINVAL;
 379
 380         /* INVWREF = ((7 * fs) / B) * 2^5 */
 381         t = sample_freq_hz;
 382         t *= 7;
 383         t *= 32;
 384         t *= 10;
 385         do_div(t, bw);
 386         t += 5;
 387         do_div(t, 10);
 388
 389         tda10048_writereg(state, TDA10048_TIME_INVWREF_LSB, (u8)t);
 390         tda10048_writereg(state, TDA10048_TIME_INVWREF_MSB, (u8)(t >> 8));
 391
 392         return 0;
 393 }
 394
 395 static int tda10048_set_bandwidth(struct dvb_frontend *fe,
 396         u32 bw)
 397 {
 398         struct tda10048_state *state = fe->demodulator_priv;
 399         dprintk(1, "%s(bw=%d)\n", __func__, bw);
 400
 401         /* Bandwidth setting may need to be adjusted */
 402         switch (bw) {
 403         case 6000000:
 404         case 7000000:
 405         case 8000000:
 406                 tda10048_set_wref(fe, state->sample_freq, bw);
 407                 tda10048_set_invwref(fe, state->sample_freq, bw);
 408                 break;
 409         default:
 410                 printk(KERN_ERR "%s() invalid bandwidth\n", __func__);
 411                 return -EINVAL;
 412         }
 413
 414         state->bandwidth = bw;
 415
 416         return 0;
 417 }
 418
 419 static int tda10048_set_if(struct dvb_frontend *fe, u32 bw)
 420 {
 421         struct tda10048_state *state = fe->demodulator_priv;
 422         struct tda10048_config *config = &state->config;
 423         int i;
 424         u32 if_freq_khz;
 425
 426         dprintk(1, "%s(bw = %d)\n", __func__, bw);
 427
 428         /* based on target bandwidth and clk we calculate pll factors */
 429         switch (bw) {
 430         case 6000000:
 431                 if_freq_khz = config->dtv6_if_freq_khz;
 432                 break;
 433         case 7000000:
 434                 if_freq_khz = config->dtv7_if_freq_khz;
 435                 break;
 436         case 8000000:
 437                 if_freq_khz = config->dtv8_if_freq_khz;
 438                 break;
 439         default:
 440                 printk(KERN_ERR "%s() no default\n", __func__);
 441                 return -EINVAL;
 442         }
 443
 444         for (i = 0; i < ARRAY_SIZE(pll_tab); i++) {
 445                 if ((pll_tab[i].clk_freq_khz == config->clk_freq_khz) &&
 446                         (pll_tab[i].if_freq_khz == if_freq_khz)) {
 447
 448                         state->freq_if_hz = pll_tab[i].if_freq_khz * 1000;
 449                         state->xtal_hz = pll_tab[i].clk_freq_khz * 1000;
 450                         break;
 451                 }
 452         }
 453         if (i == ARRAY_SIZE(pll_tab)) {
 454                 printk(KERN_ERR "%s() Incorrect attach settings\n",
 455                         __func__);
 456                 return -EINVAL;
 457         }
 458
 459         dprintk(1, "- freq_if_hz = %d\n", state->freq_if_hz);
 460         dprintk(1, "- xtal_hz = %d\n", state->xtal_hz);
 461         dprintk(1, "- pll_mfactor = %d\n", state->pll_mfactor);
 462         dprintk(1, "- pll_nfactor = %d\n", state->pll_nfactor);
 463         dprintk(1, "- pll_pfactor = %d\n", state->pll_pfactor);
 464
 465         /* Calculate the sample frequency */
 466         state->sample_freq = state->xtal_hz * (state->pll_mfactor + 45);
 467         state->sample_freq /= (state->pll_nfactor + 1);
 468         state->sample_freq /= (state->pll_pfactor + 4);
 469         dprintk(1, "- sample_freq = %d\n", state->sample_freq);
 470
 471         /* Update the I/F */
 472         tda10048_set_phy2(fe, state->sample_freq, state->freq_if_hz);
 473
 474         return 0;
 475 }
 476
 477 static int tda10048_firmware_upload(struct dvb_frontend *fe)
 478 {
 479         struct tda10048_state *state = fe->demodulator_priv;
 480         struct tda10048_config *config = &state->config;
 481         const struct firmware *fw;
 482         int ret;
 483         int pos = 0;
 484         int cnt;
 485         u8 wlen = config->fwbulkwritelen;
 486
 487         if ((wlen != TDA10048_BULKWRITE_200) && (wlen != TDA10048_BULKWRITE_50))
 488                 wlen = TDA10048_BULKWRITE_200;
 489
 490         /* request the firmware, this will block and timeout */
 491         printk(KERN_INFO "%s: waiting for firmware upload (%s)...\n",
 492                 __func__,
 493                 TDA10048_DEFAULT_FIRMWARE);
 494
 495         ret = request_firmware(&fw, TDA10048_DEFAULT_FIRMWARE,
 496                 state->i2c->dev.parent);
 497         if (ret) {
 498                 printk(KERN_ERR "%s: Upload failed. (file not found?)\n",
 499                         __func__);
 500                 return -EIO;
 501         } else {
 502                 printk(KERN_INFO "%s: firmware read %zu bytes.\n",
 503                         __func__,
 504                         fw->size);
 505                 ret = 0;
 506         }
 507
 508         if (fw->size != TDA10048_DEFAULT_FIRMWARE_SIZE) {
 509                 printk(KERN_ERR "%s: firmware incorrect size\n", __func__);
 510                 ret = -EIO;
 511         } else {
 512                 printk(KERN_INFO "%s: firmware uploading\n", __func__);
 513
 514                 /* Soft reset */
 515                 tda10048_writereg(state, TDA10048_CONF_TRISTATE1,
 516                         tda10048_readreg(state, TDA10048_CONF_TRISTATE1)
 517                                 & 0xfe);
 518                 tda10048_writereg(state, TDA10048_CONF_TRISTATE1,
 519                         tda10048_readreg(state, TDA10048_CONF_TRISTATE1)
 520                                 | 0x01);
 521
 522                 /* Put the demod into host download mode */
 523                 tda10048_writereg(state, TDA10048_CONF_C4_1,
 524                         tda10048_readreg(state, TDA10048_CONF_C4_1) & 0xf9);
 525
 526                 /* Boot the DSP */
 527                 tda10048_writereg(state, TDA10048_CONF_C4_1,
 528                         tda10048_readreg(state, TDA10048_CONF_C4_1) | 0x08);
 529
 530                 /* Prepare for download */
 531                 tda10048_writereg(state, TDA10048_DSP_CODE_CPT, 0);
 532
 533                 /* Download the firmware payload */
 534                 while (pos < fw->size) {
 535
 536                         if ((fw->size - pos) > wlen)
 537                                 cnt = wlen;
 538                         else
 539                                 cnt = fw->size - pos;
 540
 541                         tda10048_writeregbulk(state, TDA10048_DSP_CODE_IN,
 542                                 &fw->data[pos], cnt);
 543
 544                         pos += cnt;
 545                 }
 546
 547                 ret = -EIO;
 548                 /* Wait up to 250ms for the DSP to boot */
 549                 for (cnt = 0; cnt < 250 ; cnt += 10) {
 550
 551                         msleep(10);
 552
 553                         if (tda10048_readreg(state, TDA10048_SYNC_STATUS)
 554                                 & 0x40) {
 555                                 ret = 0;
 556                                 break;
 557                         }
 558                 }
 559         }
 560
 561         release_firmware(fw);
 562
 563         if (ret == 0) {
 564                 printk(KERN_INFO "%s: firmware uploaded\n", __func__);
 565                 state->fwloaded = 1;
 566         } else
 567                 printk(KERN_ERR "%s: firmware upload failed\n", __func__);
 568
 569         return ret;
 570 }
 571
 572 static int tda10048_set_inversion(struct dvb_frontend *fe, int inversion)
 573 {
 574         struct tda10048_state *state = fe->demodulator_priv;
 575
 576         dprintk(1, "%s(%d)\n", __func__, inversion);
 577
 578         if (inversion == TDA10048_INVERSION_ON)
 579                 tda10048_writereg(state, TDA10048_CONF_C1_1,
 580                         tda10048_readreg(state, TDA10048_CONF_C1_1) | 0x20);
 581         else
 582                 tda10048_writereg(state, TDA10048_CONF_C1_1,
 583                         tda10048_readreg(state, TDA10048_CONF_C1_1) & 0xdf);
 584
 585         return 0;
 586 }
 587
 588 /* Retrieve the demod settings */
 589 static int tda10048_get_tps(struct tda10048_state *state,
 590         struct dtv_frontend_properties *p)
 591 {
 592         u8 val;
 593
 594         /* Make sure the TPS regs are valid */
 595         if (!(tda10048_readreg(state, TDA10048_AUTO) & 0x01))
 596                 return -EAGAIN;
 597
 598         val = tda10048_readreg(state, TDA10048_OUT_CONF2);
 599         switch ((val & 0x60) >> 5) {
 600         case 0:
 601                 p->modulation = QPSK;
 602                 break;
 603         case 1:
 604                 p->modulation = QAM_16;
 605                 break;
 606         case 2:
 607                 p->modulation = QAM_64;
 608                 break;
 609         }
 610         switch ((val & 0x18) >> 3) {
 611         case 0:
 612                 p->hierarchy = HIERARCHY_NONE;
 613                 break;
 614         case 1:
 615                 p->hierarchy = HIERARCHY_1;
 616                 break;
 617         case 2:
 618                 p->hierarchy = HIERARCHY_2;
 619                 break;
 620         case 3:
 621                 p->hierarchy = HIERARCHY_4;
 622                 break;
 623         }
 624         switch (val & 0x07) {
 625         case 0:
 626                 p->code_rate_HP = FEC_1_2;
 627                 break;
 628         case 1:
 629                 p->code_rate_HP = FEC_2_3;
 630                 break;
 631         case 2:
 632                 p->code_rate_HP = FEC_3_4;
 633                 break;
 634         case 3:
 635                 p->code_rate_HP = FEC_5_6;
 636                 break;
 637         case 4:
 638                 p->code_rate_HP = FEC_7_8;
 639                 break;
 640         }
 641
 642         val = tda10048_readreg(state, TDA10048_OUT_CONF3);
 643         switch (val & 0x07) {
 644         case 0:
 645                 p->code_rate_LP = FEC_1_2;
 646                 break;
 647         case 1:
 648                 p->code_rate_LP = FEC_2_3;
 649                 break;
 650         case 2:
 651                 p->code_rate_LP = FEC_3_4;
 652                 break;
 653         case 3:
 654                 p->code_rate_LP = FEC_5_6;
 655                 break;
 656         case 4:
 657                 p->code_rate_LP = FEC_7_8;
 658                 break;
 659         }
 660
 661         val = tda10048_readreg(state, TDA10048_OUT_CONF1);
 662         switch ((val & 0x0c) >> 2) {
 663         case 0:
 664                 p->guard_interval = GUARD_INTERVAL_1_32;
 665                 break;
 666         case 1:
 667                 p->guard_interval = GUARD_INTERVAL_1_16;
 668                 break;
 669         case 2:
 670                 p->guard_interval =  GUARD_INTERVAL_1_8;
 671                 break;
 672         case 3:
 673                 p->guard_interval =  GUARD_INTERVAL_1_4;
 674                 break;
 675         }
 676         switch (val & 0x03) {
 677         case 0:
 678                 p->transmission_mode = TRANSMISSION_MODE_2K;
 679                 break;
 680         case 1:
 681                 p->transmission_mode = TRANSMISSION_MODE_8K;
 682                 break;
 683         }
 684
 685         return 0;
 686 }
 687
 688 static int tda10048_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
 689 {
 690         struct tda10048_state *state = fe->demodulator_priv;
 691         struct tda10048_config *config = &state->config;
 692         dprintk(1, "%s(%d)\n", __func__, enable);
 693
 694         if (config->disable_gate_access)
 695                 return 0;
 696
 697         if (enable)
 698                 return tda10048_writereg(state, TDA10048_CONF_C4_1,
 699                         tda10048_readreg(state, TDA10048_CONF_C4_1) | 0x02);
 700         else
 701                 return tda10048_writereg(state, TDA10048_CONF_C4_1,
 702                         tda10048_readreg(state, TDA10048_CONF_C4_1) & 0xfd);
 703 }
 704
 705 static int tda10048_output_mode(struct dvb_frontend *fe, int serial)
 706 {
 707         struct tda10048_state *state = fe->demodulator_priv;
 708         dprintk(1, "%s(%d)\n", __func__, serial);
 709
 710         /* Ensure pins are out of tri-state */
 711         tda10048_writereg(state, TDA10048_CONF_TRISTATE1, 0x21);
 712         tda10048_writereg(state, TDA10048_CONF_TRISTATE2, 0x00);
 713
 714         if (serial) {
 715                 tda10048_writereg(state, TDA10048_IC_MODE, 0x80 | 0x20);
 716                 tda10048_writereg(state, TDA10048_CONF_TS2, 0xc0);
 717         } else {
 718                 tda10048_writereg(state, TDA10048_IC_MODE, 0x00);
 719                 tda10048_writereg(state, TDA10048_CONF_TS2, 0x01);
 720         }
 721
 722         return 0;
 723 }
 724
 725 /* Talk to the demod, set the FEC, GUARD, QAM settings etc */
 726 /* TODO: Support manual tuning with specific params */
 727 static int tda10048_set_frontend(struct dvb_frontend *fe)
 728 {
 729         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 730         struct tda10048_state *state = fe->demodulator_priv;
 731
 732         dprintk(1, "%s(frequency=%d)\n", __func__, p->frequency);
 733
 734         /* Update the I/F pll's if the bandwidth changes */
 735         if (p->bandwidth_hz != state->bandwidth) {
 736                 tda10048_set_if(fe, p->bandwidth_hz);
 737                 tda10048_set_bandwidth(fe, p->bandwidth_hz);
 738         }
 739
 740         if (fe->ops.tuner_ops.set_params) {
 741
 742                 if (fe->ops.i2c_gate_ctrl)
 743                         fe->ops.i2c_gate_ctrl(fe, 1);
 744
 745                 fe->ops.tuner_ops.set_params(fe);
 746
 747                 if (fe->ops.i2c_gate_ctrl)
 748                         fe->ops.i2c_gate_ctrl(fe, 0);
 749         }
 750
 751         /* Enable demod TPS auto detection and begin acquisition */
 752         tda10048_writereg(state, TDA10048_AUTO, 0x57);
 753         /* trigger cber and vber acquisition */
 754         tda10048_writereg(state, TDA10048_CVBER_CTRL, 0x3B);
 755
 756         return 0;
 757 }
 758
 759 /* Establish sane defaults and load firmware. */
 760 static int tda10048_init(struct dvb_frontend *fe)
 761 {
 762         struct tda10048_state *state = fe->demodulator_priv;
 763         struct tda10048_config *config = &state->config;
 764         int ret = 0, i;
 765
 766         dprintk(1, "%s()\n", __func__);
 767
 768         /* PLL */
 769         init_tab[4].data = (u8)(state->pll_mfactor);
 770         init_tab[5].data = (u8)(state->pll_nfactor) | 0x40;
 771
 772         /* Apply register defaults */
 773         for (i = 0; i < ARRAY_SIZE(init_tab); i++)
 774                 tda10048_writereg(state, init_tab[i].reg, init_tab[i].data);
 775
 776         if (state->fwloaded == 0)
 777                 ret = tda10048_firmware_upload(fe);
 778
 779         /* Set either serial or parallel */
 780         tda10048_output_mode(fe, config->output_mode);
 781
 782         /* Set inversion */
 783         tda10048_set_inversion(fe, config->inversion);
 784
 785         /* Establish default RF values */
 786         tda10048_set_if(fe, 8000000);
 787         tda10048_set_bandwidth(fe, 8000000);
 788
 789         /* Ensure we leave the gate closed */
 790         tda10048_i2c_gate_ctrl(fe, 0);
 791
 792         return ret;
 793 }
 794
 795 static int tda10048_read_status(struct dvb_frontend *fe, enum fe_status *status)
 796 {
 797         struct tda10048_state *state = fe->demodulator_priv;
 798         u8 reg;
 799
 800         *status = 0;
 801
 802         reg = tda10048_readreg(state, TDA10048_SYNC_STATUS);
 803
 804         dprintk(1, "%s() status =0x%02x\n", __func__, reg);
 805
 806         if (reg & 0x02)
 807                 *status |= FE_HAS_CARRIER;
 808
 809         if (reg & 0x04)
 810                 *status |= FE_HAS_SIGNAL;
 811
 812         if (reg & 0x08) {
 813                 *status |= FE_HAS_LOCK;
 814                 *status |= FE_HAS_VITERBI;
 815                 *status |= FE_HAS_SYNC;
 816         }
 817
 818         return 0;
 819 }
 820
 821 static int tda10048_read_ber(struct dvb_frontend *fe, u32 *ber)
 822 {
 823         struct tda10048_state *state = fe->demodulator_priv;
 824         static u32 cber_current;
 825         u32 cber_nmax;
 826         u64 cber_tmp;
 827
 828         dprintk(1, "%s()\n", __func__);
 829
 830         /* update cber on interrupt */
 831         if (tda10048_readreg(state, TDA10048_SOFT_IT_C3) & 0x01) {
 832                 cber_tmp = tda10048_readreg(state, TDA10048_CBER_MSB) << 8 |
 833                         tda10048_readreg(state, TDA10048_CBER_LSB);
 834                 cber_nmax = tda10048_readreg(state, TDA10048_CBER_NMAX_MSB) << 8 |
 835                         tda10048_readreg(state, TDA10048_CBER_NMAX_LSB);
 836                 cber_tmp *= 100000000;
 837                 cber_tmp *= 2;
 838                 cber_tmp = div_u64(cber_tmp, (cber_nmax * 32) + 1);
 839                 cber_current = (u32)cber_tmp;
 840                 /* retrigger cber acquisition */
 841                 tda10048_writereg(state, TDA10048_CVBER_CTRL, 0x39);
 842         }
 843         /* actual cber is (*ber)/1e8 */
 844         *ber = cber_current;
 845
 846         return 0;
 847 }
 848
 849 static int tda10048_read_signal_strength(struct dvb_frontend *fe,
 850         u16 *signal_strength)
 851 {
 852         struct tda10048_state *state = fe->demodulator_priv;
 853         u8 v;
 854
 855         dprintk(1, "%s()\n", __func__);
 856
 857         *signal_strength = 65535;
 858
 859         v = tda10048_readreg(state, TDA10048_NP_OUT);
 860         if (v > 0)
 861                 *signal_strength -= (v << 8) | v;
 862
 863         return 0;
 864 }
 865
 866 /* SNR lookup table */
 867 static struct snr_tab {
 868         u8 val;
 869         u8 data;
 870 } snr_tab[] = {
 871         {   0,   0 },
 872         {   1, 246 },
 873         {   2, 215 },
 874         {   3, 198 },
 875         {   4, 185 },
 876         {   5, 176 },
 877         {   6, 168 },
 878         {   7, 161 },
 879         {   8, 155 },
 880         {   9, 150 },
 881         {  10, 146 },
 882         {  11, 141 },
 883         {  12, 138 },
 884         {  13, 134 },
 885         {  14, 131 },
 886         {  15, 128 },
 887         {  16, 125 },
 888         {  17, 122 },
 889         {  18, 120 },
 890         {  19, 118 },
 891         {  20, 115 },
 892         {  21, 113 },
 893         {  22, 111 },
 894         {  23, 109 },
 895         {  24, 107 },
 896         {  25, 106 },
 897         {  26, 104 },
 898         {  27, 102 },
 899         {  28, 101 },
 900         {  29,  99 },
 901         {  30,  98 },
 902         {  31,  96 },
 903         {  32,  95 },
 904         {  33,  94 },
 905         {  34,  92 },
 906         {  35,  91 },
 907         {  36,  90 },
 908         {  37,  89 },
 909         {  38,  88 },
 910         {  39,  86 },
 911         {  40,  85 },
 912         {  41,  84 },
 913         {  42,  83 },
 914         {  43,  82 },
 915         {  44,  81 },
 916         {  45,  80 },
 917         {  46,  79 },
 918         {  47,  78 },
 919         {  48,  77 },
 920         {  49,  76 },
 921         {  50,  76 },
 922         {  51,  75 },
 923         {  52,  74 },
 924         {  53,  73 },
 925         {  54,  72 },
 926         {  56,  71 },
 927         {  57,  70 },
 928         {  58,  69 },
 929         {  60,  68 },
 930         {  61,  67 },
 931         {  63,  66 },
 932         {  64,  65 },
 933         {  66,  64 },
 934         {  67,  63 },
 935         {  68,  62 },
 936         {  69,  62 },
 937         {  70,  61 },
 938         {  72,  60 },
 939         {  74,  59 },
 940         {  75,  58 },
 941         {  77,  57 },
 942         {  79,  56 },
 943         {  81,  55 },
 944         {  83,  54 },
 945         {  85,  53 },
 946         {  87,  52 },
 947         {  89,  51 },
 948         {  91,  50 },
 949         {  93,  49 },
 950         {  95,  48 },
 951         {  97,  47 },
 952         { 100,  46 },
 953         { 102,  45 },
 954         { 104,  44 },
 955         { 107,  43 },
 956         { 109,  42 },
 957         { 112,  41 },
 958         { 114,  40 },
 959         { 117,  39 },
 960         { 120,  38 },
 961         { 123,  37 },
 962         { 125,  36 },
 963         { 128,  35 },
 964         { 131,  34 },
 965         { 134,  33 },
 966         { 138,  32 },
 967         { 141,  31 },
 968         { 144,  30 },
 969         { 147,  29 },
 970         { 151,  28 },
 971         { 154,  27 },
 972         { 158,  26 },
 973         { 162,  25 },
 974         { 165,  24 },
 975         { 169,  23 },
 976         { 173,  22 },
 977         { 177,  21 },
 978         { 181,  20 },
 979         { 186,  19 },
 980         { 190,  18 },
 981         { 194,  17 },
 982         { 199,  16 },
 983         { 204,  15 },
 984         { 208,  14 },
 985         { 213,  13 },
 986         { 218,  12 },
 987         { 223,  11 },
 988         { 229,  10 },
 989         { 234,   9 },
 990         { 239,   8 },
 991         { 245,   7 },
 992         { 251,   6 },
 993         { 255,   5 },
 994 };
 995
 996 static int tda10048_read_snr(struct dvb_frontend *fe, u16 *snr)
 997 {
 998         struct tda10048_state *state = fe->demodulator_priv;
 999         u8 v;
1000         int i, ret = -EINVAL;
1001
1002         dprintk(1, "%s()\n", __func__);
1003
1004         v = tda10048_readreg(state, TDA10048_NP_OUT);
1005         for (i = 0; i < ARRAY_SIZE(snr_tab); i++) {
1006                 if (v <= snr_tab[i].val) {
1007                         *snr = snr_tab[i].data;
1008                         ret = 0;
1009                         break;
1010                 }
1011         }
1012
1013         return ret;
1014 }
1015
1016 static int tda10048_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
1017 {
1018         struct tda10048_state *state = fe->demodulator_priv;
1019
1020         dprintk(1, "%s()\n", __func__);
1021
1022         *ucblocks = tda10048_readreg(state, TDA10048_UNCOR_CPT_MSB) << 8 |
1023                 tda10048_readreg(state, TDA10048_UNCOR_CPT_LSB);
1024         /* clear the uncorrected TS packets counter when saturated */
1025         if (*ucblocks == 0xFFFF)
1026                 tda10048_writereg(state, TDA10048_UNCOR_CTRL, 0x80);
1027
1028         return 0;
1029 }
1030
1031 static int tda10048_get_frontend(struct dvb_frontend *fe,
1032                                  struct dtv_frontend_properties *p)
1033 {
1034         struct tda10048_state *state = fe->demodulator_priv;
1035
1036         dprintk(1, "%s()\n", __func__);
1037
1038         p->inversion = tda10048_readreg(state, TDA10048_CONF_C1_1)
1039                 & 0x20 ? INVERSION_ON : INVERSION_OFF;
1040
1041         return tda10048_get_tps(state, p);
1042 }
1043
1044 static int tda10048_get_tune_settings(struct dvb_frontend *fe,
1045         struct dvb_frontend_tune_settings *tune)
1046 {
1047         tune->min_delay_ms = 1000;
1048         return 0;
1049 }
1050
1051 static void tda10048_release(struct dvb_frontend *fe)
1052 {
1053         struct tda10048_state *state = fe->demodulator_priv;
1054         dprintk(1, "%s()\n", __func__);
1055         kfree(state);
1056 }
1057
1058 static void tda10048_establish_defaults(struct dvb_frontend *fe)
1059 {
1060         struct tda10048_state *state = fe->demodulator_priv;
1061         struct tda10048_config *config = &state->config;
1062
1063         /* Validate/default the config */
1064         if (config->dtv6_if_freq_khz == 0) {
1065                 config->dtv6_if_freq_khz = TDA10048_IF_4300;
1066                 printk(KERN_WARNING "%s() tda10048_config.dtv6_if_freq_khz is not set (defaulting to %d)\n",
1067                         __func__,
1068                         config->dtv6_if_freq_khz);
1069         }
1070
1071         if (config->dtv7_if_freq_khz == 0) {
1072                 config->dtv7_if_freq_khz = TDA10048_IF_4300;
1073                 printk(KERN_WARNING "%s() tda10048_config.dtv7_if_freq_khz is not set (defaulting to %d)\n",
1074                         __func__,
1075                         config->dtv7_if_freq_khz);
1076         }
1077
1078         if (config->dtv8_if_freq_khz == 0) {
1079                 config->dtv8_if_freq_khz = TDA10048_IF_4300;
1080                 printk(KERN_WARNING "%s() tda10048_config.dtv8_if_freq_khz is not set (defaulting to %d)\n",
1081                         __func__,
1082                         config->dtv8_if_freq_khz);
1083         }
1084
1085         if (config->clk_freq_khz == 0) {
1086                 config->clk_freq_khz = TDA10048_CLK_16000;
1087                 printk(KERN_WARNING "%s() tda10048_config.clk_freq_khz is not set (defaulting to %d)\n",
1088                         __func__,
1089                         config->clk_freq_khz);
1090         }
1091 }
1092
1093 static const struct dvb_frontend_ops tda10048_ops;
1094
1095 struct dvb_frontend *tda10048_attach(const struct tda10048_config *config,
1096         struct i2c_adapter *i2c)
1097 {
1098         struct tda10048_state *state = NULL;
1099
1100         dprintk(1, "%s()\n", __func__);
1101
1102         /* allocate memory for the internal state */
1103         state = kzalloc(sizeof(struct tda10048_state), GFP_KERNEL);
1104         if (state == NULL)
1105                 goto error;
1106
1107         /* setup the state and clone the config */
1108         memcpy(&state->config, config, sizeof(*config));
1109         state->i2c = i2c;
1110         state->fwloaded = config->no_firmware;
1111         state->bandwidth = 8000000;
1112
1113         /* check if the demod is present */
1114         if (tda10048_readreg(state, TDA10048_IDENTITY) != 0x048)
1115                 goto error;
1116
1117         /* create dvb_frontend */
1118         memcpy(&state->frontend.ops, &tda10048_ops,
1119                 sizeof(struct dvb_frontend_ops));
1120         state->frontend.demodulator_priv = state;
1121
1122         /* set pll */
1123         if (config->set_pll) {
1124                 state->pll_mfactor = config->pll_m;
1125                 state->pll_nfactor = config->pll_n;
1126                 state->pll_pfactor = config->pll_p;
1127         } else {
1128                 state->pll_mfactor = 10;
1129                 state->pll_nfactor = 3;
1130                 state->pll_pfactor = 0;
1131         }
1132
1133         /* Establish any defaults the the user didn't pass */
1134         tda10048_establish_defaults(&state->frontend);
1135
1136         /* Set the xtal and freq defaults */
1137         if (tda10048_set_if(&state->frontend, 8000000) != 0)
1138                 goto error;
1139
1140         /* Default bandwidth */
1141         if (tda10048_set_bandwidth(&state->frontend, 8000000) != 0)
1142                 goto error;
1143
1144         /* Leave the gate closed */
1145         tda10048_i2c_gate_ctrl(&state->frontend, 0);
1146
1147         return &state->frontend;
1148
1149 error:
1150         kfree(state);
1151         return NULL;
1152 }
1153 EXPORT_SYMBOL(tda10048_attach);
1154
1155 static const struct dvb_frontend_ops tda10048_ops = {
1156         .delsys = { SYS_DVBT },
1157         .info = {
1158                 .name                   = "NXP TDA10048HN DVB-T",
1159                 .frequency_min          = 177000000,
1160                 .frequency_max          = 858000000,
1161                 .frequency_stepsize     = 166666,
1162                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
1163                 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
1164                 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
1165                 FE_CAN_HIERARCHY_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
1166                 FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_RECOVER
1167         },
1168
1169         .release = tda10048_release,
1170         .init = tda10048_init,
1171         .i2c_gate_ctrl = tda10048_i2c_gate_ctrl,
1172         .set_frontend = tda10048_set_frontend,
1173         .get_frontend = tda10048_get_frontend,
1174         .get_tune_settings = tda10048_get_tune_settings,
1175         .read_status = tda10048_read_status,
1176         .read_ber = tda10048_read_ber,
1177         .read_signal_strength = tda10048_read_signal_strength,
1178         .read_snr = tda10048_read_snr,
1179         .read_ucblocks = tda10048_read_ucblocks,
1180 };
1181
1182 module_param(debug, int, 0644);
1183 MODULE_PARM_DESC(debug, "Enable verbose debug messages");
1184
1185 MODULE_DESCRIPTION("NXP TDA10048HN DVB-T Demodulator driver");
1186 MODULE_AUTHOR("Steven Toth");
1187 MODULE_LICENSE("GPL");