drivers/media/dvb-frontends/tda10048.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3     NXP TDA10048HN DVB OFDM demodulator driver
   4
   5     Copyright (C) 2009 Steven Toth <[email protected]>
   6
   7
   8 */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/init.h>
  12 #include <linux/module.h>
  13 #include <linux/string.h>
  14 #include <linux/slab.h>
  15 #include <linux/delay.h>
  16 #include <linux/math64.h>
  17 #include <asm/div64.h>
  18 #include <media/dvb_frontend.h>
  19 #include <linux/int_log.h>
  20 #include "tda10048.h"
  21
  22 #define TDA10048_DEFAULT_FIRMWARE "dvb-fe-tda10048-1.0.fw"
  23 #define TDA10048_DEFAULT_FIRMWARE_SIZE 24878
  24
  25 /* Register name definitions */
  26 #define TDA10048_IDENTITY          0x00
  27 #define TDA10048_VERSION           0x01
  28 #define TDA10048_DSP_CODE_CPT      0x0C
  29 #define TDA10048_DSP_CODE_IN       0x0E
  30 #define TDA10048_IN_CONF1          0x10
  31 #define TDA10048_IN_CONF2          0x11
  32 #define TDA10048_IN_CONF3          0x12
  33 #define TDA10048_OUT_CONF1         0x14
  34 #define TDA10048_OUT_CONF2         0x15
  35 #define TDA10048_OUT_CONF3         0x16
  36 #define TDA10048_AUTO              0x18
  37 #define TDA10048_SYNC_STATUS       0x1A
  38 #define TDA10048_CONF_C4_1         0x1E
  39 #define TDA10048_CONF_C4_2         0x1F
  40 #define TDA10048_CODE_IN_RAM       0x20
  41 #define TDA10048_CHANNEL_INFO1_R   0x22
  42 #define TDA10048_CHANNEL_INFO2_R   0x23
  43 #define TDA10048_CHANNEL_INFO1     0x24
  44 #define TDA10048_CHANNEL_INFO2     0x25
  45 #define TDA10048_TIME_ERROR_R      0x26
  46 #define TDA10048_TIME_ERROR        0x27
  47 #define TDA10048_FREQ_ERROR_LSB_R  0x28
  48 #define TDA10048_FREQ_ERROR_MSB_R  0x29
  49 #define TDA10048_FREQ_ERROR_LSB    0x2A
  50 #define TDA10048_FREQ_ERROR_MSB    0x2B
  51 #define TDA10048_IT_SEL            0x30
  52 #define TDA10048_IT_STAT           0x32
  53 #define TDA10048_DSP_AD_LSB        0x3C
  54 #define TDA10048_DSP_AD_MSB        0x3D
  55 #define TDA10048_DSP_REG_LSB       0x3E
  56 #define TDA10048_DSP_REG_MSB       0x3F
  57 #define TDA10048_CONF_TRISTATE1    0x44
  58 #define TDA10048_CONF_TRISTATE2    0x45
  59 #define TDA10048_CONF_POLARITY     0x46
  60 #define TDA10048_GPIO_SP_DS0       0x48
  61 #define TDA10048_GPIO_SP_DS1       0x49
  62 #define TDA10048_GPIO_SP_DS2       0x4A
  63 #define TDA10048_GPIO_SP_DS3       0x4B
  64 #define TDA10048_GPIO_OUT_SEL      0x4C
  65 #define TDA10048_GPIO_SELECT       0x4D
  66 #define TDA10048_IC_MODE           0x4E
  67 #define TDA10048_CONF_XO           0x50
  68 #define TDA10048_CONF_PLL1         0x51
  69 #define TDA10048_CONF_PLL2         0x52
  70 #define TDA10048_CONF_PLL3         0x53
  71 #define TDA10048_CONF_ADC          0x54
  72 #define TDA10048_CONF_ADC_2        0x55
  73 #define TDA10048_CONF_C1_1         0x60
  74 #define TDA10048_CONF_C1_3         0x62
  75 #define TDA10048_AGC_CONF          0x70
  76 #define TDA10048_AGC_THRESHOLD_LSB 0x72
  77 #define TDA10048_AGC_THRESHOLD_MSB 0x73
  78 #define TDA10048_AGC_RENORM        0x74
  79 #define TDA10048_AGC_GAINS         0x76
  80 #define TDA10048_AGC_TUN_MIN       0x78
  81 #define TDA10048_AGC_TUN_MAX       0x79
  82 #define TDA10048_AGC_IF_MIN        0x7A
  83 #define TDA10048_AGC_IF_MAX        0x7B
  84 #define TDA10048_AGC_TUN_LEVEL     0x7E
  85 #define TDA10048_AGC_IF_LEVEL      0x7F
  86 #define TDA10048_DIG_AGC_LEVEL     0x81
  87 #define TDA10048_FREQ_PHY2_LSB     0x86
  88 #define TDA10048_FREQ_PHY2_MSB     0x87
  89 #define TDA10048_TIME_INVWREF_LSB  0x88
  90 #define TDA10048_TIME_INVWREF_MSB  0x89
  91 #define TDA10048_TIME_WREF_LSB     0x8A
  92 #define TDA10048_TIME_WREF_MID1    0x8B
  93 #define TDA10048_TIME_WREF_MID2    0x8C
  94 #define TDA10048_TIME_WREF_MSB     0x8D
  95 #define TDA10048_NP_OUT            0xA2
  96 #define TDA10048_CELL_ID_LSB       0xA4
  97 #define TDA10048_CELL_ID_MSB       0xA5
  98 #define TDA10048_EXTTPS_ODD        0xAA
  99 #define TDA10048_EXTTPS_EVEN       0xAB
 100 #define TDA10048_TPS_LENGTH        0xAC
 101 #define TDA10048_FREE_REG_1        0xB2
 102 #define TDA10048_FREE_REG_2        0xB3
 103 #define TDA10048_CONF_C3_1         0xC0
 104 #define TDA10048_CVBER_CTRL        0xC2
 105 #define TDA10048_CBER_NMAX_LSB     0xC4
 106 #define TDA10048_CBER_NMAX_MSB     0xC5
 107 #define TDA10048_CBER_LSB          0xC6
 108 #define TDA10048_CBER_MSB          0xC7
 109 #define TDA10048_VBER_LSB          0xC8
 110 #define TDA10048_VBER_MID          0xC9
 111 #define TDA10048_VBER_MSB          0xCA
 112 #define TDA10048_CVBER_LUT         0xCC
 113 #define TDA10048_UNCOR_CTRL        0xCD
 114 #define TDA10048_UNCOR_CPT_LSB     0xCE
 115 #define TDA10048_UNCOR_CPT_MSB     0xCF
 116 #define TDA10048_SOFT_IT_C3        0xD6
 117 #define TDA10048_CONF_TS2          0xE0
 118 #define TDA10048_CONF_TS1          0xE1
 119
 120 static unsigned int debug;
 121
 122 #define dprintk(level, fmt, arg...)\
 123         do { if (debug >= level)\
 124                 printk(KERN_DEBUG "tda10048: " fmt, ## arg);\
 125         } while (0)
 126
 127 struct tda10048_state {
 128
 129         struct i2c_adapter *i2c;
 130
 131         /* We'll cache and update the attach config settings */
 132         struct tda10048_config config;
 133         struct dvb_frontend frontend;
 134
 135         int fwloaded;
 136
 137         u32 freq_if_hz;
 138         u32 xtal_hz;
 139         u32 pll_mfactor;
 140         u32 pll_nfactor;
 141         u32 pll_pfactor;
 142         u32 sample_freq;
 143
 144         u32 bandwidth;
 145 };
 146
 147 static struct init_tab {
 148         u8      reg;
 149         u16     data;
 150 } init_tab[] = {
 151         { TDA10048_CONF_PLL1, 0x08 },
 152         { TDA10048_CONF_ADC_2, 0x00 },
 153         { TDA10048_CONF_C4_1, 0x00 },
 154         { TDA10048_CONF_PLL1, 0x0f },
 155         { TDA10048_CONF_PLL2, 0x0a },
 156         { TDA10048_CONF_PLL3, 0x43 },
 157         { TDA10048_FREQ_PHY2_LSB, 0x02 },
 158         { TDA10048_FREQ_PHY2_MSB, 0x0a },
 159         { TDA10048_TIME_WREF_LSB, 0xbd },
 160         { TDA10048_TIME_WREF_MID1, 0xe4 },
 161         { TDA10048_TIME_WREF_MID2, 0xa8 },
 162         { TDA10048_TIME_WREF_MSB, 0x02 },
 163         { TDA10048_TIME_INVWREF_LSB, 0x04 },
 164         { TDA10048_TIME_INVWREF_MSB, 0x06 },
 165         { TDA10048_CONF_C4_1, 0x00 },
 166         { TDA10048_CONF_C1_1, 0xa8 },
 167         { TDA10048_AGC_CONF, 0x16 },
 168         { TDA10048_CONF_C1_3, 0x0b },
 169         { TDA10048_AGC_TUN_MIN, 0x00 },
 170         { TDA10048_AGC_TUN_MAX, 0xff },
 171         { TDA10048_AGC_IF_MIN, 0x00 },
 172         { TDA10048_AGC_IF_MAX, 0xff },
 173         { TDA10048_AGC_THRESHOLD_MSB, 0x00 },
 174         { TDA10048_AGC_THRESHOLD_LSB, 0x70 },
 175         { TDA10048_CVBER_CTRL, 0x38 },
 176         { TDA10048_AGC_GAINS, 0x12 },
 177         { TDA10048_CONF_XO, 0x00 },
 178         { TDA10048_CONF_TS1, 0x07 },
 179         { TDA10048_IC_MODE, 0x00 },
 180         { TDA10048_CONF_TS2, 0xc0 },
 181         { TDA10048_CONF_TRISTATE1, 0x21 },
 182         { TDA10048_CONF_TRISTATE2, 0x00 },
 183         { TDA10048_CONF_POLARITY, 0x00 },
 184         { TDA10048_CONF_C4_2, 0x04 },
 185         { TDA10048_CONF_ADC, 0x60 },
 186         { TDA10048_CONF_ADC_2, 0x10 },
 187         { TDA10048_CONF_ADC, 0x60 },
 188         { TDA10048_CONF_ADC_2, 0x00 },
 189         { TDA10048_CONF_C1_1, 0xa8 },
 190         { TDA10048_UNCOR_CTRL, 0x00 },
 191         { TDA10048_CONF_C4_2, 0x04 },
 192 };
 193
 194 static struct pll_tab {
 195         u32     clk_freq_khz;
 196         u32     if_freq_khz;
 197 } pll_tab[] = {
 198         { TDA10048_CLK_4000,  TDA10048_IF_36130 },
 199         { TDA10048_CLK_16000, TDA10048_IF_3300 },
 200         { TDA10048_CLK_16000, TDA10048_IF_3500 },
 201         { TDA10048_CLK_16000, TDA10048_IF_3800 },
 202         { TDA10048_CLK_16000, TDA10048_IF_4000 },
 203         { TDA10048_CLK_16000, TDA10048_IF_4300 },
 204         { TDA10048_CLK_16000, TDA10048_IF_4500 },
 205         { TDA10048_CLK_16000, TDA10048_IF_5000 },
 206         { TDA10048_CLK_16000, TDA10048_IF_36130 },
 207 };
 208
 209 static int tda10048_writereg(struct tda10048_state *state, u8 reg, u8 data)
 210 {
 211         struct tda10048_config *config = &state->config;
 212         int ret;
 213         u8 buf[] = { reg, data };
 214         struct i2c_msg msg = {
 215                 .addr = config->demod_address,
 216                 .flags = 0, .buf = buf, .len = 2 };
 217
 218         dprintk(2, "%s(reg = 0x%02x, data = 0x%02x)\n", __func__, reg, data);
 219
 220         ret = i2c_transfer(state->i2c, &msg, 1);
 221
 222         if (ret != 1)
 223                 printk("%s: writereg error (ret == %i)\n", __func__, ret);
 224
 225         return (ret != 1) ? -1 : 0;
 226 }
 227
 228 static u8 tda10048_readreg(struct tda10048_state *state, u8 reg)
 229 {
 230         struct tda10048_config *config = &state->config;
 231         int ret;
 232         u8 b0[] = { reg };
 233         u8 b1[] = { 0 };
 234         struct i2c_msg msg[] = {
 235                 { .addr = config->demod_address,
 236                         .flags = 0, .buf = b0, .len = 1 },
 237                 { .addr = config->demod_address,
 238                         .flags = I2C_M_RD, .buf = b1, .len = 1 } };
 239
 240         dprintk(2, "%s(reg = 0x%02x)\n", __func__, reg);
 241
 242         ret = i2c_transfer(state->i2c, msg, 2);
 243
 244         if (ret != 2)
 245                 printk(KERN_ERR "%s: readreg error (ret == %i)\n",
 246                         __func__, ret);
 247
 248         return b1[0];
 249 }
 250
 251 static int tda10048_writeregbulk(struct tda10048_state *state, u8 reg,
 252                                  const u8 *data, u16 len)
 253 {
 254         struct tda10048_config *config = &state->config;
 255         int ret = -EREMOTEIO;
 256         struct i2c_msg msg;
 257         u8 *buf;
 258
 259         dprintk(2, "%s(%d, ?, len = %d)\n", __func__, reg, len);
 260
 261         buf = kmalloc(len + 1, GFP_KERNEL);
 262         if (buf == NULL) {
 263                 ret = -ENOMEM;
 264                 goto error;
 265         }
 266
 267         *buf = reg;
 268         memcpy(buf + 1, data, len);
 269
 270         msg.addr = config->demod_address;
 271         msg.flags = 0;
 272         msg.buf = buf;
 273         msg.len = len + 1;
 274
 275         dprintk(2, "%s():  write len = %d\n",
 276                 __func__, msg.len);
 277
 278         ret = i2c_transfer(state->i2c, &msg, 1);
 279         if (ret != 1) {
 280                 printk(KERN_ERR "%s(): writereg error err %i\n",
 281                          __func__, ret);
 282                 ret = -EREMOTEIO;
 283         }
 284
 285 error:
 286         kfree(buf);
 287
 288         return ret;
 289 }
 290
 291 static int tda10048_set_phy2(struct dvb_frontend *fe, u32 sample_freq_hz,
 292                              u32 if_hz)
 293 {
 294         struct tda10048_state *state = fe->demodulator_priv;
 295         u64 t;
 296
 297         dprintk(1, "%s()\n", __func__);
 298
 299         if (sample_freq_hz == 0)
 300                 return -EINVAL;
 301
 302         if (if_hz < (sample_freq_hz / 2)) {
 303                 /* PHY2 = (if2/fs) * 2^15 */
 304                 t = if_hz;
 305                 t *= 10;
 306                 t *= 32768;
 307                 do_div(t, sample_freq_hz);
 308                 t += 5;
 309                 do_div(t, 10);
 310         } else {
 311                 /* PHY2 = ((IF1-fs)/fs) * 2^15 */
 312                 t = sample_freq_hz - if_hz;
 313                 t *= 10;
 314                 t *= 32768;
 315                 do_div(t, sample_freq_hz);
 316                 t += 5;
 317                 do_div(t, 10);
 318                 t = ~t + 1;
 319         }
 320
 321         tda10048_writereg(state, TDA10048_FREQ_PHY2_LSB, (u8)t);
 322         tda10048_writereg(state, TDA10048_FREQ_PHY2_MSB, (u8)(t >> 8));
 323
 324         return 0;
 325 }
 326
 327 static int tda10048_set_wref(struct dvb_frontend *fe, u32 sample_freq_hz,
 328                              u32 bw)
 329 {
 330         struct tda10048_state *state = fe->demodulator_priv;
 331         u64 t, z;
 332
 333         dprintk(1, "%s()\n", __func__);
 334
 335         if (sample_freq_hz == 0)
 336                 return -EINVAL;
 337
 338         /* WREF = (B / (7 * fs)) * 2^31 */
 339         t = bw * 10;
 340         /* avoid warning: this decimal constant is unsigned only in ISO C90 */
 341         /* t *= 2147483648 on 32bit platforms */
 342         t *= (2048 * 1024);
 343         t *= 1024;
 344         z = 7 * sample_freq_hz;
 345         do_div(t, z);
 346         t += 5;
 347         do_div(t, 10);
 348
 349         tda10048_writereg(state, TDA10048_TIME_WREF_LSB, (u8)t);
 350         tda10048_writereg(state, TDA10048_TIME_WREF_MID1, (u8)(t >> 8));
 351         tda10048_writereg(state, TDA10048_TIME_WREF_MID2, (u8)(t >> 16));
 352         tda10048_writereg(state, TDA10048_TIME_WREF_MSB, (u8)(t >> 24));
 353
 354         return 0;
 355 }
 356
 357 static int tda10048_set_invwref(struct dvb_frontend *fe, u32 sample_freq_hz,
 358                                 u32 bw)
 359 {
 360         struct tda10048_state *state = fe->demodulator_priv;
 361         u64 t;
 362
 363         dprintk(1, "%s()\n", __func__);
 364
 365         if (sample_freq_hz == 0)
 366                 return -EINVAL;
 367
 368         /* INVWREF = ((7 * fs) / B) * 2^5 */
 369         t = sample_freq_hz;
 370         t *= 7;
 371         t *= 32;
 372         t *= 10;
 373         do_div(t, bw);
 374         t += 5;
 375         do_div(t, 10);
 376
 377         tda10048_writereg(state, TDA10048_TIME_INVWREF_LSB, (u8)t);
 378         tda10048_writereg(state, TDA10048_TIME_INVWREF_MSB, (u8)(t >> 8));
 379
 380         return 0;
 381 }
 382
 383 static int tda10048_set_bandwidth(struct dvb_frontend *fe,
 384         u32 bw)
 385 {
 386         struct tda10048_state *state = fe->demodulator_priv;
 387         dprintk(1, "%s(bw=%d)\n", __func__, bw);
 388
 389         /* Bandwidth setting may need to be adjusted */
 390         switch (bw) {
 391         case 6000000:
 392         case 7000000:
 393         case 8000000:
 394                 tda10048_set_wref(fe, state->sample_freq, bw);
 395                 tda10048_set_invwref(fe, state->sample_freq, bw);
 396                 break;
 397         default:
 398                 printk(KERN_ERR "%s() invalid bandwidth\n", __func__);
 399                 return -EINVAL;
 400         }
 401
 402         state->bandwidth = bw;
 403
 404         return 0;
 405 }
 406
 407 static int tda10048_set_if(struct dvb_frontend *fe, u32 bw)
 408 {
 409         struct tda10048_state *state = fe->demodulator_priv;
 410         struct tda10048_config *config = &state->config;
 411         int i;
 412         u32 if_freq_khz;
 413         u64 sample_freq;
 414
 415         dprintk(1, "%s(bw = %d)\n", __func__, bw);
 416
 417         /* based on target bandwidth and clk we calculate pll factors */
 418         switch (bw) {
 419         case 6000000:
 420                 if_freq_khz = config->dtv6_if_freq_khz;
 421                 break;
 422         case 7000000:
 423                 if_freq_khz = config->dtv7_if_freq_khz;
 424                 break;
 425         case 8000000:
 426                 if_freq_khz = config->dtv8_if_freq_khz;
 427                 break;
 428         default:
 429                 printk(KERN_ERR "%s() no default\n", __func__);
 430                 return -EINVAL;
 431         }
 432
 433         for (i = 0; i < ARRAY_SIZE(pll_tab); i++) {
 434                 if ((pll_tab[i].clk_freq_khz == config->clk_freq_khz) &&
 435                         (pll_tab[i].if_freq_khz == if_freq_khz)) {
 436
 437                         state->freq_if_hz = pll_tab[i].if_freq_khz * 1000;
 438                         state->xtal_hz = pll_tab[i].clk_freq_khz * 1000;
 439                         break;
 440                 }
 441         }
 442         if (i == ARRAY_SIZE(pll_tab)) {
 443                 printk(KERN_ERR "%s() Incorrect attach settings\n",
 444                         __func__);
 445                 return -EINVAL;
 446         }
 447
 448         dprintk(1, "- freq_if_hz = %d\n", state->freq_if_hz);
 449         dprintk(1, "- xtal_hz = %d\n", state->xtal_hz);
 450         dprintk(1, "- pll_mfactor = %d\n", state->pll_mfactor);
 451         dprintk(1, "- pll_nfactor = %d\n", state->pll_nfactor);
 452         dprintk(1, "- pll_pfactor = %d\n", state->pll_pfactor);
 453
 454         /* Calculate the sample frequency */
 455         sample_freq = state->xtal_hz;
 456         sample_freq *= state->pll_mfactor + 45;
 457         do_div(sample_freq, state->pll_nfactor + 1);
 458         do_div(sample_freq, state->pll_pfactor + 4);
 459         state->sample_freq = sample_freq;
 460         dprintk(1, "- sample_freq = %d\n", state->sample_freq);
 461
 462         /* Update the I/F */
 463         tda10048_set_phy2(fe, state->sample_freq, state->freq_if_hz);
 464
 465         return 0;
 466 }
 467
 468 static int tda10048_firmware_upload(struct dvb_frontend *fe)
 469 {
 470         struct tda10048_state *state = fe->demodulator_priv;
 471         struct tda10048_config *config = &state->config;
 472         const struct firmware *fw;
 473         int ret;
 474         int pos = 0;
 475         int cnt;
 476         u8 wlen = config->fwbulkwritelen;
 477
 478         if ((wlen != TDA10048_BULKWRITE_200) && (wlen != TDA10048_BULKWRITE_50))
 479                 wlen = TDA10048_BULKWRITE_200;
 480
 481         /* request the firmware, this will block and timeout */
 482         printk(KERN_INFO "%s: waiting for firmware upload (%s)...\n",
 483                 __func__,
 484                 TDA10048_DEFAULT_FIRMWARE);
 485
 486         ret = request_firmware(&fw, TDA10048_DEFAULT_FIRMWARE,
 487                 state->i2c->dev.parent);
 488         if (ret) {
 489                 printk(KERN_ERR "%s: Upload failed. (file not found?)\n",
 490                         __func__);
 491                 return -EIO;
 492         } else {
 493                 printk(KERN_INFO "%s: firmware read %zu bytes.\n",
 494                         __func__,
 495                         fw->size);
 496                 ret = 0;
 497         }
 498
 499         if (fw->size != TDA10048_DEFAULT_FIRMWARE_SIZE) {
 500                 printk(KERN_ERR "%s: firmware incorrect size\n", __func__);
 501                 ret = -EIO;
 502         } else {
 503                 printk(KERN_INFO "%s: firmware uploading\n", __func__);
 504
 505                 /* Soft reset */
 506                 tda10048_writereg(state, TDA10048_CONF_TRISTATE1,
 507                         tda10048_readreg(state, TDA10048_CONF_TRISTATE1)
 508                                 & 0xfe);
 509                 tda10048_writereg(state, TDA10048_CONF_TRISTATE1,
 510                         tda10048_readreg(state, TDA10048_CONF_TRISTATE1)
 511                                 | 0x01);
 512
 513                 /* Put the demod into host download mode */
 514                 tda10048_writereg(state, TDA10048_CONF_C4_1,
 515                         tda10048_readreg(state, TDA10048_CONF_C4_1) & 0xf9);
 516
 517                 /* Boot the DSP */
 518                 tda10048_writereg(state, TDA10048_CONF_C4_1,
 519                         tda10048_readreg(state, TDA10048_CONF_C4_1) | 0x08);
 520
 521                 /* Prepare for download */
 522                 tda10048_writereg(state, TDA10048_DSP_CODE_CPT, 0);
 523
 524                 /* Download the firmware payload */
 525                 while (pos < fw->size) {
 526
 527                         if ((fw->size - pos) > wlen)
 528                                 cnt = wlen;
 529                         else
 530                                 cnt = fw->size - pos;
 531
 532                         tda10048_writeregbulk(state, TDA10048_DSP_CODE_IN,
 533                                 &fw->data[pos], cnt);
 534
 535                         pos += cnt;
 536                 }
 537
 538                 ret = -EIO;
 539                 /* Wait up to 250ms for the DSP to boot */
 540                 for (cnt = 0; cnt < 250 ; cnt += 10) {
 541
 542                         msleep(10);
 543
 544                         if (tda10048_readreg(state, TDA10048_SYNC_STATUS)
 545                                 & 0x40) {
 546                                 ret = 0;
 547                                 break;
 548                         }
 549                 }
 550         }
 551
 552         release_firmware(fw);
 553
 554         if (ret == 0) {
 555                 printk(KERN_INFO "%s: firmware uploaded\n", __func__);
 556                 state->fwloaded = 1;
 557         } else
 558                 printk(KERN_ERR "%s: firmware upload failed\n", __func__);
 559
 560         return ret;
 561 }
 562
 563 static int tda10048_set_inversion(struct dvb_frontend *fe, int inversion)
 564 {
 565         struct tda10048_state *state = fe->demodulator_priv;
 566
 567         dprintk(1, "%s(%d)\n", __func__, inversion);
 568
 569         if (inversion == TDA10048_INVERSION_ON)
 570                 tda10048_writereg(state, TDA10048_CONF_C1_1,
 571                         tda10048_readreg(state, TDA10048_CONF_C1_1) | 0x20);
 572         else
 573                 tda10048_writereg(state, TDA10048_CONF_C1_1,
 574                         tda10048_readreg(state, TDA10048_CONF_C1_1) & 0xdf);
 575
 576         return 0;
 577 }
 578
 579 /* Retrieve the demod settings */
 580 static int tda10048_get_tps(struct tda10048_state *state,
 581         struct dtv_frontend_properties *p)
 582 {
 583         u8 val;
 584
 585         /* Make sure the TPS regs are valid */
 586         if (!(tda10048_readreg(state, TDA10048_AUTO) & 0x01))
 587                 return -EAGAIN;
 588
 589         val = tda10048_readreg(state, TDA10048_OUT_CONF2);
 590         switch ((val & 0x60) >> 5) {
 591         case 0:
 592                 p->modulation = QPSK;
 593                 break;
 594         case 1:
 595                 p->modulation = QAM_16;
 596                 break;
 597         case 2:
 598                 p->modulation = QAM_64;
 599                 break;
 600         }
 601         switch ((val & 0x18) >> 3) {
 602         case 0:
 603                 p->hierarchy = HIERARCHY_NONE;
 604                 break;
 605         case 1:
 606                 p->hierarchy = HIERARCHY_1;
 607                 break;
 608         case 2:
 609                 p->hierarchy = HIERARCHY_2;
 610                 break;
 611         case 3:
 612                 p->hierarchy = HIERARCHY_4;
 613                 break;
 614         }
 615         switch (val & 0x07) {
 616         case 0:
 617                 p->code_rate_HP = FEC_1_2;
 618                 break;
 619         case 1:
 620                 p->code_rate_HP = FEC_2_3;
 621                 break;
 622         case 2:
 623                 p->code_rate_HP = FEC_3_4;
 624                 break;
 625         case 3:
 626                 p->code_rate_HP = FEC_5_6;
 627                 break;
 628         case 4:
 629                 p->code_rate_HP = FEC_7_8;
 630                 break;
 631         }
 632
 633         val = tda10048_readreg(state, TDA10048_OUT_CONF3);
 634         switch (val & 0x07) {
 635         case 0:
 636                 p->code_rate_LP = FEC_1_2;
 637                 break;
 638         case 1:
 639                 p->code_rate_LP = FEC_2_3;
 640                 break;
 641         case 2:
 642                 p->code_rate_LP = FEC_3_4;
 643                 break;
 644         case 3:
 645                 p->code_rate_LP = FEC_5_6;
 646                 break;
 647         case 4:
 648                 p->code_rate_LP = FEC_7_8;
 649                 break;
 650         }
 651
 652         val = tda10048_readreg(state, TDA10048_OUT_CONF1);
 653         switch ((val & 0x0c) >> 2) {
 654         case 0:
 655                 p->guard_interval = GUARD_INTERVAL_1_32;
 656                 break;
 657         case 1:
 658                 p->guard_interval = GUARD_INTERVAL_1_16;
 659                 break;
 660         case 2:
 661                 p->guard_interval =  GUARD_INTERVAL_1_8;
 662                 break;
 663         case 3:
 664                 p->guard_interval =  GUARD_INTERVAL_1_4;
 665                 break;
 666         }
 667         switch (val & 0x03) {
 668         case 0:
 669                 p->transmission_mode = TRANSMISSION_MODE_2K;
 670                 break;
 671         case 1:
 672                 p->transmission_mode = TRANSMISSION_MODE_8K;
 673                 break;
 674         }
 675
 676         return 0;
 677 }
 678
 679 static int tda10048_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
 680 {
 681         struct tda10048_state *state = fe->demodulator_priv;
 682         struct tda10048_config *config = &state->config;
 683         dprintk(1, "%s(%d)\n", __func__, enable);
 684
 685         if (config->disable_gate_access)
 686                 return 0;
 687
 688         if (enable)
 689                 return tda10048_writereg(state, TDA10048_CONF_C4_1,
 690                         tda10048_readreg(state, TDA10048_CONF_C4_1) | 0x02);
 691         else
 692                 return tda10048_writereg(state, TDA10048_CONF_C4_1,
 693                         tda10048_readreg(state, TDA10048_CONF_C4_1) & 0xfd);
 694 }
 695
 696 static int tda10048_output_mode(struct dvb_frontend *fe, int serial)
 697 {
 698         struct tda10048_state *state = fe->demodulator_priv;
 699         dprintk(1, "%s(%d)\n", __func__, serial);
 700
 701         /* Ensure pins are out of tri-state */
 702         tda10048_writereg(state, TDA10048_CONF_TRISTATE1, 0x21);
 703         tda10048_writereg(state, TDA10048_CONF_TRISTATE2, 0x00);
 704
 705         if (serial) {
 706                 tda10048_writereg(state, TDA10048_IC_MODE, 0x80 | 0x20);
 707                 tda10048_writereg(state, TDA10048_CONF_TS2, 0xc0);
 708         } else {
 709                 tda10048_writereg(state, TDA10048_IC_MODE, 0x00);
 710                 tda10048_writereg(state, TDA10048_CONF_TS2, 0x01);
 711         }
 712
 713         return 0;
 714 }
 715
 716 /* Talk to the demod, set the FEC, GUARD, QAM settings etc */
 717 /* TODO: Support manual tuning with specific params */
 718 static int tda10048_set_frontend(struct dvb_frontend *fe)
 719 {
 720         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 721         struct tda10048_state *state = fe->demodulator_priv;
 722
 723         dprintk(1, "%s(frequency=%d)\n", __func__, p->frequency);
 724
 725         /* Update the I/F pll's if the bandwidth changes */
 726         if (p->bandwidth_hz != state->bandwidth) {
 727                 tda10048_set_if(fe, p->bandwidth_hz);
 728                 tda10048_set_bandwidth(fe, p->bandwidth_hz);
 729         }
 730
 731         if (fe->ops.tuner_ops.set_params) {
 732
 733                 if (fe->ops.i2c_gate_ctrl)
 734                         fe->ops.i2c_gate_ctrl(fe, 1);
 735
 736                 fe->ops.tuner_ops.set_params(fe);
 737
 738                 if (fe->ops.i2c_gate_ctrl)
 739                         fe->ops.i2c_gate_ctrl(fe, 0);
 740         }
 741
 742         /* Enable demod TPS auto detection and begin acquisition */
 743         tda10048_writereg(state, TDA10048_AUTO, 0x57);
 744         /* trigger cber and vber acquisition */
 745         tda10048_writereg(state, TDA10048_CVBER_CTRL, 0x3B);
 746
 747         return 0;
 748 }
 749
 750 /* Establish sane defaults and load firmware. */
 751 static int tda10048_init(struct dvb_frontend *fe)
 752 {
 753         struct tda10048_state *state = fe->demodulator_priv;
 754         struct tda10048_config *config = &state->config;
 755         int ret = 0, i;
 756
 757         dprintk(1, "%s()\n", __func__);
 758
 759         /* PLL */
 760         init_tab[4].data = (u8)(state->pll_mfactor);
 761         init_tab[5].data = (u8)(state->pll_nfactor) | 0x40;
 762
 763         /* Apply register defaults */
 764         for (i = 0; i < ARRAY_SIZE(init_tab); i++)
 765                 tda10048_writereg(state, init_tab[i].reg, init_tab[i].data);
 766
 767         if (state->fwloaded == 0)
 768                 ret = tda10048_firmware_upload(fe);
 769
 770         /* Set either serial or parallel */
 771         tda10048_output_mode(fe, config->output_mode);
 772
 773         /* Set inversion */
 774         tda10048_set_inversion(fe, config->inversion);
 775
 776         /* Establish default RF values */
 777         tda10048_set_if(fe, 8000000);
 778         tda10048_set_bandwidth(fe, 8000000);
 779
 780         /* Ensure we leave the gate closed */
 781         tda10048_i2c_gate_ctrl(fe, 0);
 782
 783         return ret;
 784 }
 785
 786 static int tda10048_read_status(struct dvb_frontend *fe, enum fe_status *status)
 787 {
 788         struct tda10048_state *state = fe->demodulator_priv;
 789         u8 reg;
 790
 791         *status = 0;
 792
 793         reg = tda10048_readreg(state, TDA10048_SYNC_STATUS);
 794
 795         dprintk(1, "%s() status =0x%02x\n", __func__, reg);
 796
 797         if (reg & 0x02)
 798                 *status |= FE_HAS_CARRIER;
 799
 800         if (reg & 0x04)
 801                 *status |= FE_HAS_SIGNAL;
 802
 803         if (reg & 0x08) {
 804                 *status |= FE_HAS_LOCK;
 805                 *status |= FE_HAS_VITERBI;
 806                 *status |= FE_HAS_SYNC;
 807         }
 808
 809         return 0;
 810 }
 811
 812 static int tda10048_read_ber(struct dvb_frontend *fe, u32 *ber)
 813 {
 814         struct tda10048_state *state = fe->demodulator_priv;
 815         static u32 cber_current;
 816         u32 cber_nmax;
 817         u64 cber_tmp;
 818
 819         dprintk(1, "%s()\n", __func__);
 820
 821         /* update cber on interrupt */
 822         if (tda10048_readreg(state, TDA10048_SOFT_IT_C3) & 0x01) {
 823                 cber_tmp = tda10048_readreg(state, TDA10048_CBER_MSB) << 8 |
 824                         tda10048_readreg(state, TDA10048_CBER_LSB);
 825                 cber_nmax = tda10048_readreg(state, TDA10048_CBER_NMAX_MSB) << 8 |
 826                         tda10048_readreg(state, TDA10048_CBER_NMAX_LSB);
 827                 cber_tmp *= 100000000;
 828                 cber_tmp *= 2;
 829                 cber_tmp = div_u64(cber_tmp, (cber_nmax * 32) + 1);
 830                 cber_current = (u32)cber_tmp;
 831                 /* retrigger cber acquisition */
 832                 tda10048_writereg(state, TDA10048_CVBER_CTRL, 0x39);
 833         }
 834         /* actual cber is (*ber)/1e8 */
 835         *ber = cber_current;
 836
 837         return 0;
 838 }
 839
 840 static int tda10048_read_signal_strength(struct dvb_frontend *fe,
 841         u16 *signal_strength)
 842 {
 843         struct tda10048_state *state = fe->demodulator_priv;
 844         u8 v;
 845
 846         dprintk(1, "%s()\n", __func__);
 847
 848         *signal_strength = 65535;
 849
 850         v = tda10048_readreg(state, TDA10048_NP_OUT);
 851         if (v > 0)
 852                 *signal_strength -= (v << 8) | v;
 853
 854         return 0;
 855 }
 856
 857 /* SNR lookup table */
 858 static struct snr_tab {
 859         u8 val;
 860         u8 data;
 861 } snr_tab[] = {
 862         {   0,   0 },
 863         {   1, 246 },
 864         {   2, 215 },
 865         {   3, 198 },
 866         {   4, 185 },
 867         {   5, 176 },
 868         {   6, 168 },
 869         {   7, 161 },
 870         {   8, 155 },
 871         {   9, 150 },
 872         {  10, 146 },
 873         {  11, 141 },
 874         {  12, 138 },
 875         {  13, 134 },
 876         {  14, 131 },
 877         {  15, 128 },
 878         {  16, 125 },
 879         {  17, 122 },
 880         {  18, 120 },
 881         {  19, 118 },
 882         {  20, 115 },
 883         {  21, 113 },
 884         {  22, 111 },
 885         {  23, 109 },
 886         {  24, 107 },
 887         {  25, 106 },
 888         {  26, 104 },
 889         {  27, 102 },
 890         {  28, 101 },
 891         {  29,  99 },
 892         {  30,  98 },
 893         {  31,  96 },
 894         {  32,  95 },
 895         {  33,  94 },
 896         {  34,  92 },
 897         {  35,  91 },
 898         {  36,  90 },
 899         {  37,  89 },
 900         {  38,  88 },
 901         {  39,  86 },
 902         {  40,  85 },
 903         {  41,  84 },
 904         {  42,  83 },
 905         {  43,  82 },
 906         {  44,  81 },
 907         {  45,  80 },
 908         {  46,  79 },
 909         {  47,  78 },
 910         {  48,  77 },
 911         {  49,  76 },
 912         {  50,  76 },
 913         {  51,  75 },
 914         {  52,  74 },
 915         {  53,  73 },
 916         {  54,  72 },
 917         {  56,  71 },
 918         {  57,  70 },
 919         {  58,  69 },
 920         {  60,  68 },
 921         {  61,  67 },
 922         {  63,  66 },
 923         {  64,  65 },
 924         {  66,  64 },
 925         {  67,  63 },
 926         {  68,  62 },
 927         {  69,  62 },
 928         {  70,  61 },
 929         {  72,  60 },
 930         {  74,  59 },
 931         {  75,  58 },
 932         {  77,  57 },
 933         {  79,  56 },
 934         {  81,  55 },
 935         {  83,  54 },
 936         {  85,  53 },
 937         {  87,  52 },
 938         {  89,  51 },
 939         {  91,  50 },
 940         {  93,  49 },
 941         {  95,  48 },
 942         {  97,  47 },
 943         { 100,  46 },
 944         { 102,  45 },
 945         { 104,  44 },
 946         { 107,  43 },
 947         { 109,  42 },
 948         { 112,  41 },
 949         { 114,  40 },
 950         { 117,  39 },
 951         { 120,  38 },
 952         { 123,  37 },
 953         { 125,  36 },
 954         { 128,  35 },
 955         { 131,  34 },
 956         { 134,  33 },
 957         { 138,  32 },
 958         { 141,  31 },
 959         { 144,  30 },
 960         { 147,  29 },
 961         { 151,  28 },
 962         { 154,  27 },
 963         { 158,  26 },
 964         { 162,  25 },
 965         { 165,  24 },
 966         { 169,  23 },
 967         { 173,  22 },
 968         { 177,  21 },
 969         { 181,  20 },
 970         { 186,  19 },
 971         { 190,  18 },
 972         { 194,  17 },
 973         { 199,  16 },
 974         { 204,  15 },
 975         { 208,  14 },
 976         { 213,  13 },
 977         { 218,  12 },
 978         { 223,  11 },
 979         { 229,  10 },
 980         { 234,   9 },
 981         { 239,   8 },
 982         { 245,   7 },
 983         { 251,   6 },
 984         { 255,   5 },
 985 };
 986
 987 static int tda10048_read_snr(struct dvb_frontend *fe, u16 *snr)
 988 {
 989         struct tda10048_state *state = fe->demodulator_priv;
 990         u8 v;
 991         int i, ret = -EINVAL;
 992
 993         dprintk(1, "%s()\n", __func__);
 994
 995         v = tda10048_readreg(state, TDA10048_NP_OUT);
 996         for (i = 0; i < ARRAY_SIZE(snr_tab); i++) {
 997                 if (v <= snr_tab[i].val) {
 998                         *snr = snr_tab[i].data;
 999                         ret = 0;
1000                         break;
1001                 }
1002         }
1003
1004         return ret;
1005 }
1006
1007 static int tda10048_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
1008 {
1009         struct tda10048_state *state = fe->demodulator_priv;
1010
1011         dprintk(1, "%s()\n", __func__);
1012
1013         *ucblocks = tda10048_readreg(state, TDA10048_UNCOR_CPT_MSB) << 8 |
1014                 tda10048_readreg(state, TDA10048_UNCOR_CPT_LSB);
1015         /* clear the uncorrected TS packets counter when saturated */
1016         if (*ucblocks == 0xFFFF)
1017                 tda10048_writereg(state, TDA10048_UNCOR_CTRL, 0x80);
1018
1019         return 0;
1020 }
1021
1022 static int tda10048_get_frontend(struct dvb_frontend *fe,
1023                                  struct dtv_frontend_properties *p)
1024 {
1025         struct tda10048_state *state = fe->demodulator_priv;
1026
1027         dprintk(1, "%s()\n", __func__);
1028
1029         p->inversion = tda10048_readreg(state, TDA10048_CONF_C1_1)
1030                 & 0x20 ? INVERSION_ON : INVERSION_OFF;
1031
1032         return tda10048_get_tps(state, p);
1033 }
1034
1035 static int tda10048_get_tune_settings(struct dvb_frontend *fe,
1036         struct dvb_frontend_tune_settings *tune)
1037 {
1038         tune->min_delay_ms = 1000;
1039         return 0;
1040 }
1041
1042 static void tda10048_release(struct dvb_frontend *fe)
1043 {
1044         struct tda10048_state *state = fe->demodulator_priv;
1045         dprintk(1, "%s()\n", __func__);
1046         kfree(state);
1047 }
1048
1049 static void tda10048_establish_defaults(struct dvb_frontend *fe)
1050 {
1051         struct tda10048_state *state = fe->demodulator_priv;
1052         struct tda10048_config *config = &state->config;
1053
1054         /* Validate/default the config */
1055         if (config->dtv6_if_freq_khz == 0) {
1056                 config->dtv6_if_freq_khz = TDA10048_IF_4300;
1057                 printk(KERN_WARNING "%s() tda10048_config.dtv6_if_freq_khz is not set (defaulting to %d)\n",
1058                         __func__,
1059                         config->dtv6_if_freq_khz);
1060         }
1061
1062         if (config->dtv7_if_freq_khz == 0) {
1063                 config->dtv7_if_freq_khz = TDA10048_IF_4300;
1064                 printk(KERN_WARNING "%s() tda10048_config.dtv7_if_freq_khz is not set (defaulting to %d)\n",
1065                         __func__,
1066                         config->dtv7_if_freq_khz);
1067         }
1068
1069         if (config->dtv8_if_freq_khz == 0) {
1070                 config->dtv8_if_freq_khz = TDA10048_IF_4300;
1071                 printk(KERN_WARNING "%s() tda10048_config.dtv8_if_freq_khz is not set (defaulting to %d)\n",
1072                         __func__,
1073                         config->dtv8_if_freq_khz);
1074         }
1075
1076         if (config->clk_freq_khz == 0) {
1077                 config->clk_freq_khz = TDA10048_CLK_16000;
1078                 printk(KERN_WARNING "%s() tda10048_config.clk_freq_khz is not set (defaulting to %d)\n",
1079                         __func__,
1080                         config->clk_freq_khz);
1081         }
1082 }
1083
1084 static const struct dvb_frontend_ops tda10048_ops;
1085
1086 struct dvb_frontend *tda10048_attach(const struct tda10048_config *config,
1087         struct i2c_adapter *i2c)
1088 {
1089         struct tda10048_state *state = NULL;
1090
1091         dprintk(1, "%s()\n", __func__);
1092
1093         /* allocate memory for the internal state */
1094         state = kzalloc(sizeof(struct tda10048_state), GFP_KERNEL);
1095         if (state == NULL)
1096                 goto error;
1097
1098         /* setup the state and clone the config */
1099         memcpy(&state->config, config, sizeof(*config));
1100         state->i2c = i2c;
1101         state->fwloaded = config->no_firmware;
1102         state->bandwidth = 8000000;
1103
1104         /* check if the demod is present */
1105         if (tda10048_readreg(state, TDA10048_IDENTITY) != 0x048)
1106                 goto error;
1107
1108         /* create dvb_frontend */
1109         memcpy(&state->frontend.ops, &tda10048_ops,
1110                 sizeof(struct dvb_frontend_ops));
1111         state->frontend.demodulator_priv = state;
1112
1113         /* set pll */
1114         if (config->set_pll) {
1115                 state->pll_mfactor = config->pll_m;
1116                 state->pll_nfactor = config->pll_n;
1117                 state->pll_pfactor = config->pll_p;
1118         } else {
1119                 state->pll_mfactor = 10;
1120                 state->pll_nfactor = 3;
1121                 state->pll_pfactor = 0;
1122         }
1123
1124         /* Establish any defaults the user didn't pass */
1125         tda10048_establish_defaults(&state->frontend);
1126
1127         /* Set the xtal and freq defaults */
1128         if (tda10048_set_if(&state->frontend, 8000000) != 0)
1129                 goto error;
1130
1131         /* Default bandwidth */
1132         if (tda10048_set_bandwidth(&state->frontend, 8000000) != 0)
1133                 goto error;
1134
1135         /* Leave the gate closed */
1136         tda10048_i2c_gate_ctrl(&state->frontend, 0);
1137
1138         return &state->frontend;
1139
1140 error:
1141         kfree(state);
1142         return NULL;
1143 }
1144 EXPORT_SYMBOL_GPL(tda10048_attach);
1145
1146 static const struct dvb_frontend_ops tda10048_ops = {
1147         .delsys = { SYS_DVBT },
1148         .info = {
1149                 .name                   = "NXP TDA10048HN DVB-T",
1150                 .frequency_min_hz       = 177 * MHz,
1151                 .frequency_max_hz       = 858 * MHz,
1152                 .frequency_stepsize_hz  = 166666,
1153                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
1154                 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
1155                 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
1156                 FE_CAN_HIERARCHY_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
1157                 FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_RECOVER
1158         },
1159
1160         .release = tda10048_release,
1161         .init = tda10048_init,
1162         .i2c_gate_ctrl = tda10048_i2c_gate_ctrl,
1163         .set_frontend = tda10048_set_frontend,
1164         .get_frontend = tda10048_get_frontend,
1165         .get_tune_settings = tda10048_get_tune_settings,
1166         .read_status = tda10048_read_status,
1167         .read_ber = tda10048_read_ber,
1168         .read_signal_strength = tda10048_read_signal_strength,
1169         .read_snr = tda10048_read_snr,
1170         .read_ucblocks = tda10048_read_ucblocks,
1171 };
1172
1173 module_param(debug, int, 0644);
1174 MODULE_PARM_DESC(debug, "Enable verbose debug messages");
1175
1176 MODULE_DESCRIPTION("NXP TDA10048HN DVB-T Demodulator driver");
1177 MODULE_AUTHOR("Steven Toth");
1178 MODULE_LICENSE("GPL");