1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Realtek RTL2832 DVB-T demodulator driver 4 * 5 * Copyright (C) 2012 Thomas Mair <thomas.mair86@gmail.com> 6 * Copyright (C) 2012-2014 Antti Palosaari <crope@iki.fi> 7 */ 8 9 #include "rtl2832_priv.h" 10 11 #define REG_MASK(b) (BIT(b + 1) - 1) 12 13 static const struct rtl2832_reg_entry registers[] = { 14 [DVBT_SOFT_RST] = {0x101, 2, 2}, 15 [DVBT_IIC_REPEAT] = {0x101, 3, 3}, 16 [DVBT_TR_WAIT_MIN_8K] = {0x188, 11, 2}, 17 [DVBT_RSD_BER_FAIL_VAL] = {0x18f, 15, 0}, 18 [DVBT_EN_BK_TRK] = {0x1a6, 7, 7}, 19 [DVBT_AD_EN_REG] = {0x008, 7, 7}, 20 [DVBT_AD_EN_REG1] = {0x008, 6, 6}, 21 [DVBT_EN_BBIN] = {0x1b1, 0, 0}, 22 [DVBT_MGD_THD0] = {0x195, 7, 0}, 23 [DVBT_MGD_THD1] = {0x196, 7, 0}, 24 [DVBT_MGD_THD2] = {0x197, 7, 0}, 25 [DVBT_MGD_THD3] = {0x198, 7, 0}, 26 [DVBT_MGD_THD4] = {0x199, 7, 0}, 27 [DVBT_MGD_THD5] = {0x19a, 7, 0}, 28 [DVBT_MGD_THD6] = {0x19b, 7, 0}, 29 [DVBT_MGD_THD7] = {0x19c, 7, 0}, 30 [DVBT_EN_CACQ_NOTCH] = {0x161, 4, 4}, 31 [DVBT_AD_AV_REF] = {0x009, 6, 0}, 32 [DVBT_REG_PI] = {0x00a, 2, 0}, 33 [DVBT_PIP_ON] = {0x021, 3, 3}, 34 [DVBT_SCALE1_B92] = {0x292, 7, 0}, 35 [DVBT_SCALE1_B93] = {0x293, 7, 0}, 36 [DVBT_SCALE1_BA7] = {0x2a7, 7, 0}, 37 [DVBT_SCALE1_BA9] = {0x2a9, 7, 0}, 38 [DVBT_SCALE1_BAA] = {0x2aa, 7, 0}, 39 [DVBT_SCALE1_BAB] = {0x2ab, 7, 0}, 40 [DVBT_SCALE1_BAC] = {0x2ac, 7, 0}, 41 [DVBT_SCALE1_BB0] = {0x2b0, 7, 0}, 42 [DVBT_SCALE1_BB1] = {0x2b1, 7, 0}, 43 [DVBT_KB_P1] = {0x164, 3, 1}, 44 [DVBT_KB_P2] = {0x164, 6, 4}, 45 [DVBT_KB_P3] = {0x165, 2, 0}, 46 [DVBT_OPT_ADC_IQ] = {0x006, 5, 4}, 47 [DVBT_AD_AVI] = {0x009, 1, 0}, 48 [DVBT_AD_AVQ] = {0x009, 3, 2}, 49 [DVBT_K1_CR_STEP12] = {0x2ad, 9, 4}, 50 [DVBT_TRK_KS_P2] = {0x16f, 2, 0}, 51 [DVBT_TRK_KS_I2] = {0x170, 5, 3}, 52 [DVBT_TR_THD_SET2] = {0x172, 3, 0}, 53 [DVBT_TRK_KC_P2] = {0x173, 5, 3}, 54 [DVBT_TRK_KC_I2] = {0x175, 2, 0}, 55 [DVBT_CR_THD_SET2] = {0x176, 7, 6}, 56 [DVBT_PSET_IFFREQ] = {0x119, 21, 0}, 57 [DVBT_SPEC_INV] = {0x115, 0, 0}, 58 [DVBT_RSAMP_RATIO] = {0x19f, 27, 2}, 59 [DVBT_CFREQ_OFF_RATIO] = {0x19d, 23, 4}, 60 [DVBT_FSM_STAGE] = {0x351, 6, 3}, 61 [DVBT_RX_CONSTEL] = {0x33c, 3, 2}, 62 [DVBT_RX_HIER] = {0x33c, 6, 4}, 63 [DVBT_RX_C_RATE_LP] = {0x33d, 2, 0}, 64 [DVBT_RX_C_RATE_HP] = {0x33d, 5, 3}, 65 [DVBT_GI_IDX] = {0x351, 1, 0}, 66 [DVBT_FFT_MODE_IDX] = {0x351, 2, 2}, 67 [DVBT_RSD_BER_EST] = {0x34e, 15, 0}, 68 [DVBT_CE_EST_EVM] = {0x40c, 15, 0}, 69 [DVBT_RF_AGC_VAL] = {0x35b, 13, 0}, 70 [DVBT_IF_AGC_VAL] = {0x359, 13, 0}, 71 [DVBT_DAGC_VAL] = {0x305, 7, 0}, 72 [DVBT_SFREQ_OFF] = {0x318, 13, 0}, 73 [DVBT_CFREQ_OFF] = {0x35f, 17, 0}, 74 [DVBT_POLAR_RF_AGC] = {0x00e, 1, 1}, 75 [DVBT_POLAR_IF_AGC] = {0x00e, 0, 0}, 76 [DVBT_AAGC_HOLD] = {0x104, 5, 5}, 77 [DVBT_EN_RF_AGC] = {0x104, 6, 6}, 78 [DVBT_EN_IF_AGC] = {0x104, 7, 7}, 79 [DVBT_IF_AGC_MIN] = {0x108, 7, 0}, 80 [DVBT_IF_AGC_MAX] = {0x109, 7, 0}, 81 [DVBT_RF_AGC_MIN] = {0x10a, 7, 0}, 82 [DVBT_RF_AGC_MAX] = {0x10b, 7, 0}, 83 [DVBT_IF_AGC_MAN] = {0x10c, 6, 6}, 84 [DVBT_IF_AGC_MAN_VAL] = {0x10c, 13, 0}, 85 [DVBT_RF_AGC_MAN] = {0x10e, 6, 6}, 86 [DVBT_RF_AGC_MAN_VAL] = {0x10e, 13, 0}, 87 [DVBT_DAGC_TRG_VAL] = {0x112, 7, 0}, 88 [DVBT_AGC_TARG_VAL_0] = {0x102, 0, 0}, 89 [DVBT_AGC_TARG_VAL_8_1] = {0x103, 7, 0}, 90 [DVBT_AAGC_LOOP_GAIN] = {0x1c7, 5, 1}, 91 [DVBT_LOOP_GAIN2_3_0] = {0x104, 4, 1}, 92 [DVBT_LOOP_GAIN2_4] = {0x105, 7, 7}, 93 [DVBT_LOOP_GAIN3] = {0x1c8, 4, 0}, 94 [DVBT_VTOP1] = {0x106, 5, 0}, 95 [DVBT_VTOP2] = {0x1c9, 5, 0}, 96 [DVBT_VTOP3] = {0x1ca, 5, 0}, 97 [DVBT_KRF1] = {0x1cb, 7, 0}, 98 [DVBT_KRF2] = {0x107, 7, 0}, 99 [DVBT_KRF3] = {0x1cd, 7, 0}, 100 [DVBT_KRF4] = {0x1ce, 7, 0}, 101 [DVBT_EN_GI_PGA] = {0x1e5, 0, 0}, 102 [DVBT_THD_LOCK_UP] = {0x1d9, 8, 0}, 103 [DVBT_THD_LOCK_DW] = {0x1db, 8, 0}, 104 [DVBT_THD_UP1] = {0x1dd, 7, 0}, 105 [DVBT_THD_DW1] = {0x1de, 7, 0}, 106 [DVBT_INTER_CNT_LEN] = {0x1d8, 3, 0}, 107 [DVBT_GI_PGA_STATE] = {0x1e6, 3, 3}, 108 [DVBT_EN_AGC_PGA] = {0x1d7, 0, 0}, 109 [DVBT_CKOUTPAR] = {0x17b, 5, 5}, 110 [DVBT_CKOUT_PWR] = {0x17b, 6, 6}, 111 [DVBT_SYNC_DUR] = {0x17b, 7, 7}, 112 [DVBT_ERR_DUR] = {0x17c, 0, 0}, 113 [DVBT_SYNC_LVL] = {0x17c, 1, 1}, 114 [DVBT_ERR_LVL] = {0x17c, 2, 2}, 115 [DVBT_VAL_LVL] = {0x17c, 3, 3}, 116 [DVBT_SERIAL] = {0x17c, 4, 4}, 117 [DVBT_SER_LSB] = {0x17c, 5, 5}, 118 [DVBT_CDIV_PH0] = {0x17d, 3, 0}, 119 [DVBT_CDIV_PH1] = {0x17d, 7, 4}, 120 [DVBT_MPEG_IO_OPT_2_2] = {0x006, 7, 7}, 121 [DVBT_MPEG_IO_OPT_1_0] = {0x007, 7, 6}, 122 [DVBT_CKOUTPAR_PIP] = {0x0b7, 4, 4}, 123 [DVBT_CKOUT_PWR_PIP] = {0x0b7, 3, 3}, 124 [DVBT_SYNC_LVL_PIP] = {0x0b7, 2, 2}, 125 [DVBT_ERR_LVL_PIP] = {0x0b7, 1, 1}, 126 [DVBT_VAL_LVL_PIP] = {0x0b7, 0, 0}, 127 [DVBT_CKOUTPAR_PID] = {0x0b9, 4, 4}, 128 [DVBT_CKOUT_PWR_PID] = {0x0b9, 3, 3}, 129 [DVBT_SYNC_LVL_PID] = {0x0b9, 2, 2}, 130 [DVBT_ERR_LVL_PID] = {0x0b9, 1, 1}, 131 [DVBT_VAL_LVL_PID] = {0x0b9, 0, 0}, 132 [DVBT_SM_PASS] = {0x193, 11, 0}, 133 [DVBT_AD7_SETTING] = {0x011, 15, 0}, 134 [DVBT_RSSI_R] = {0x301, 6, 0}, 135 [DVBT_ACI_DET_IND] = {0x312, 0, 0}, 136 [DVBT_REG_MON] = {0x00d, 1, 0}, 137 [DVBT_REG_MONSEL] = {0x00d, 2, 2}, 138 [DVBT_REG_GPE] = {0x00d, 7, 7}, 139 [DVBT_REG_GPO] = {0x010, 0, 0}, 140 [DVBT_REG_4MSEL] = {0x013, 0, 0}, 141 }; 142 143 static int rtl2832_rd_demod_reg(struct rtl2832_dev *dev, int reg, u32 *val) 144 { 145 struct i2c_client *client = dev->client; 146 int ret, i; 147 u16 reg_start_addr; 148 u8 msb, lsb, reading[4], len; 149 u32 reading_tmp, mask; 150 151 reg_start_addr = registers[reg].start_address; 152 msb = registers[reg].msb; 153 lsb = registers[reg].lsb; 154 len = (msb >> 3) + 1; 155 mask = REG_MASK(msb - lsb); 156 157 ret = regmap_bulk_read(dev->regmap, reg_start_addr, reading, len); 158 if (ret) 159 goto err; 160 161 reading_tmp = 0; 162 for (i = 0; i < len; i++) 163 reading_tmp |= reading[i] << ((len - 1 - i) * 8); 164 165 *val = (reading_tmp >> lsb) & mask; 166 167 return 0; 168 err: 169 dev_dbg(&client->dev, "failed=%d\n", ret); 170 return ret; 171 } 172 173 static int rtl2832_wr_demod_reg(struct rtl2832_dev *dev, int reg, u32 val) 174 { 175 struct i2c_client *client = dev->client; 176 int ret, i; 177 u16 reg_start_addr; 178 u8 msb, lsb, reading[4], writing[4], len; 179 u32 reading_tmp, writing_tmp, mask; 180 181 reg_start_addr = registers[reg].start_address; 182 msb = registers[reg].msb; 183 lsb = registers[reg].lsb; 184 len = (msb >> 3) + 1; 185 mask = REG_MASK(msb - lsb); 186 187 ret = regmap_bulk_read(dev->regmap, reg_start_addr, reading, len); 188 if (ret) 189 goto err; 190 191 reading_tmp = 0; 192 for (i = 0; i < len; i++) 193 reading_tmp |= reading[i] << ((len - 1 - i) * 8); 194 195 writing_tmp = reading_tmp & ~(mask << lsb); 196 writing_tmp |= ((val & mask) << lsb); 197 198 for (i = 0; i < len; i++) 199 writing[i] = (writing_tmp >> ((len - 1 - i) * 8)) & 0xff; 200 201 ret = regmap_bulk_write(dev->regmap, reg_start_addr, writing, len); 202 if (ret) 203 goto err; 204 205 return 0; 206 err: 207 dev_dbg(&client->dev, "failed=%d\n", ret); 208 return ret; 209 } 210 211 static int rtl2832_set_if(struct dvb_frontend *fe, u32 if_freq) 212 { 213 struct rtl2832_dev *dev = fe->demodulator_priv; 214 struct i2c_client *client = dev->client; 215 int ret; 216 u64 pset_iffreq; 217 u8 en_bbin = (if_freq == 0 ? 0x1 : 0x0); 218 219 /* 220 * PSET_IFFREQ = - floor((IfFreqHz % CrystalFreqHz) * pow(2, 22) 221 * / CrystalFreqHz) 222 */ 223 pset_iffreq = if_freq % dev->pdata->clk; 224 pset_iffreq *= 0x400000; 225 pset_iffreq = div_u64(pset_iffreq, dev->pdata->clk); 226 pset_iffreq = -pset_iffreq; 227 pset_iffreq = pset_iffreq & 0x3fffff; 228 dev_dbg(&client->dev, "if_frequency=%d pset_iffreq=%08x\n", 229 if_freq, (unsigned)pset_iffreq); 230 231 ret = rtl2832_wr_demod_reg(dev, DVBT_EN_BBIN, en_bbin); 232 if (ret) 233 goto err; 234 235 ret = rtl2832_wr_demod_reg(dev, DVBT_PSET_IFFREQ, pset_iffreq); 236 if (ret) 237 goto err; 238 239 return 0; 240 err: 241 dev_dbg(&client->dev, "failed=%d\n", ret); 242 return ret; 243 } 244 245 static int rtl2832_init(struct dvb_frontend *fe) 246 { 247 struct rtl2832_dev *dev = fe->demodulator_priv; 248 struct i2c_client *client = dev->client; 249 struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache; 250 const struct rtl2832_reg_value *init; 251 int i, ret, len; 252 /* initialization values for the demodulator registers */ 253 struct rtl2832_reg_value rtl2832_initial_regs[] = { 254 {DVBT_AD_EN_REG, 0x1}, 255 {DVBT_AD_EN_REG1, 0x1}, 256 {DVBT_RSD_BER_FAIL_VAL, 0x2800}, 257 {DVBT_MGD_THD0, 0x10}, 258 {DVBT_MGD_THD1, 0x20}, 259 {DVBT_MGD_THD2, 0x20}, 260 {DVBT_MGD_THD3, 0x40}, 261 {DVBT_MGD_THD4, 0x22}, 262 {DVBT_MGD_THD5, 0x32}, 263 {DVBT_MGD_THD6, 0x37}, 264 {DVBT_MGD_THD7, 0x39}, 265 {DVBT_EN_BK_TRK, 0x0}, 266 {DVBT_EN_CACQ_NOTCH, 0x0}, 267 {DVBT_AD_AV_REF, 0x2a}, 268 {DVBT_REG_PI, 0x6}, 269 {DVBT_PIP_ON, 0x0}, 270 {DVBT_CDIV_PH0, 0x8}, 271 {DVBT_CDIV_PH1, 0x8}, 272 {DVBT_SCALE1_B92, 0x4}, 273 {DVBT_SCALE1_B93, 0xb0}, 274 {DVBT_SCALE1_BA7, 0x78}, 275 {DVBT_SCALE1_BA9, 0x28}, 276 {DVBT_SCALE1_BAA, 0x59}, 277 {DVBT_SCALE1_BAB, 0x83}, 278 {DVBT_SCALE1_BAC, 0xd4}, 279 {DVBT_SCALE1_BB0, 0x65}, 280 {DVBT_SCALE1_BB1, 0x43}, 281 {DVBT_KB_P1, 0x1}, 282 {DVBT_KB_P2, 0x4}, 283 {DVBT_KB_P3, 0x7}, 284 {DVBT_K1_CR_STEP12, 0xa}, 285 {DVBT_REG_GPE, 0x1}, 286 {DVBT_SERIAL, 0x0}, 287 {DVBT_CDIV_PH0, 0x9}, 288 {DVBT_CDIV_PH1, 0x9}, 289 {DVBT_MPEG_IO_OPT_2_2, 0x0}, 290 {DVBT_MPEG_IO_OPT_1_0, 0x0}, 291 {DVBT_TRK_KS_P2, 0x4}, 292 {DVBT_TRK_KS_I2, 0x7}, 293 {DVBT_TR_THD_SET2, 0x6}, 294 {DVBT_TRK_KC_I2, 0x5}, 295 {DVBT_CR_THD_SET2, 0x1}, 296 }; 297 298 dev_dbg(&client->dev, "\n"); 299 300 ret = rtl2832_wr_demod_reg(dev, DVBT_SOFT_RST, 0x0); 301 if (ret) 302 goto err; 303 304 for (i = 0; i < ARRAY_SIZE(rtl2832_initial_regs); i++) { 305 ret = rtl2832_wr_demod_reg(dev, rtl2832_initial_regs[i].reg, 306 rtl2832_initial_regs[i].value); 307 if (ret) 308 goto err; 309 } 310 311 /* load tuner specific settings */ 312 dev_dbg(&client->dev, "load settings for tuner=%02x\n", 313 dev->pdata->tuner); 314 switch (dev->pdata->tuner) { 315 case RTL2832_TUNER_FC2580: 316 len = ARRAY_SIZE(rtl2832_tuner_init_fc2580); 317 init = rtl2832_tuner_init_fc2580; 318 break; 319 case RTL2832_TUNER_FC0012: 320 case RTL2832_TUNER_FC0013: 321 len = ARRAY_SIZE(rtl2832_tuner_init_fc0012); 322 init = rtl2832_tuner_init_fc0012; 323 break; 324 case RTL2832_TUNER_TUA9001: 325 len = ARRAY_SIZE(rtl2832_tuner_init_tua9001); 326 init = rtl2832_tuner_init_tua9001; 327 break; 328 case RTL2832_TUNER_E4000: 329 len = ARRAY_SIZE(rtl2832_tuner_init_e4000); 330 init = rtl2832_tuner_init_e4000; 331 break; 332 case RTL2832_TUNER_R820T: 333 case RTL2832_TUNER_R828D: 334 len = ARRAY_SIZE(rtl2832_tuner_init_r820t); 335 init = rtl2832_tuner_init_r820t; 336 break; 337 case RTL2832_TUNER_SI2157: 338 len = ARRAY_SIZE(rtl2832_tuner_init_si2157); 339 init = rtl2832_tuner_init_si2157; 340 break; 341 default: 342 ret = -EINVAL; 343 goto err; 344 } 345 346 for (i = 0; i < len; i++) { 347 ret = rtl2832_wr_demod_reg(dev, init[i].reg, init[i].value); 348 if (ret) 349 goto err; 350 } 351 352 /* init stats here in order signal app which stats are supported */ 353 c->strength.len = 1; 354 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 355 c->cnr.len = 1; 356 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 357 c->post_bit_error.len = 1; 358 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 359 c->post_bit_count.len = 1; 360 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 361 dev->sleeping = false; 362 363 return 0; 364 err: 365 dev_dbg(&client->dev, "failed=%d\n", ret); 366 return ret; 367 } 368 369 static int rtl2832_sleep(struct dvb_frontend *fe) 370 { 371 struct rtl2832_dev *dev = fe->demodulator_priv; 372 struct i2c_client *client = dev->client; 373 int ret; 374 375 dev_dbg(&client->dev, "\n"); 376 377 dev->sleeping = true; 378 dev->fe_status = 0; 379 380 ret = rtl2832_wr_demod_reg(dev, DVBT_SOFT_RST, 0x1); 381 if (ret) 382 goto err; 383 384 return 0; 385 err: 386 dev_dbg(&client->dev, "failed=%d\n", ret); 387 return ret; 388 } 389 390 static int rtl2832_get_tune_settings(struct dvb_frontend *fe, 391 struct dvb_frontend_tune_settings *s) 392 { 393 struct rtl2832_dev *dev = fe->demodulator_priv; 394 struct i2c_client *client = dev->client; 395 396 dev_dbg(&client->dev, "\n"); 397 s->min_delay_ms = 1000; 398 s->step_size = fe->ops.info.frequency_stepsize_hz * 2; 399 s->max_drift = (fe->ops.info.frequency_stepsize_hz * 2) + 1; 400 return 0; 401 } 402 403 static int rtl2832_set_frontend(struct dvb_frontend *fe) 404 { 405 struct rtl2832_dev *dev = fe->demodulator_priv; 406 struct i2c_client *client = dev->client; 407 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 408 int ret, i, j; 409 u64 bw_mode, num, num2; 410 u32 resamp_ratio, cfreq_off_ratio; 411 static u8 bw_params[3][32] = { 412 /* 6 MHz bandwidth */ 413 { 414 0xf5, 0xff, 0x15, 0x38, 0x5d, 0x6d, 0x52, 0x07, 0xfa, 0x2f, 415 0x53, 0xf5, 0x3f, 0xca, 0x0b, 0x91, 0xea, 0x30, 0x63, 0xb2, 416 0x13, 0xda, 0x0b, 0xc4, 0x18, 0x7e, 0x16, 0x66, 0x08, 0x67, 417 0x19, 0xe0, 418 }, 419 420 /* 7 MHz bandwidth */ 421 { 422 0xe7, 0xcc, 0xb5, 0xba, 0xe8, 0x2f, 0x67, 0x61, 0x00, 0xaf, 423 0x86, 0xf2, 0xbf, 0x59, 0x04, 0x11, 0xb6, 0x33, 0xa4, 0x30, 424 0x15, 0x10, 0x0a, 0x42, 0x18, 0xf8, 0x17, 0xd9, 0x07, 0x22, 425 0x19, 0x10, 426 }, 427 428 /* 8 MHz bandwidth */ 429 { 430 0x09, 0xf6, 0xd2, 0xa7, 0x9a, 0xc9, 0x27, 0x77, 0x06, 0xbf, 431 0xec, 0xf4, 0x4f, 0x0b, 0xfc, 0x01, 0x63, 0x35, 0x54, 0xa7, 432 0x16, 0x66, 0x08, 0xb4, 0x19, 0x6e, 0x19, 0x65, 0x05, 0xc8, 433 0x19, 0xe0, 434 }, 435 }; 436 437 dev_dbg(&client->dev, "frequency=%u bandwidth_hz=%u inversion=%u\n", 438 c->frequency, c->bandwidth_hz, c->inversion); 439 440 /* program tuner */ 441 if (fe->ops.tuner_ops.set_params) 442 fe->ops.tuner_ops.set_params(fe); 443 444 /* If the frontend has get_if_frequency(), use it */ 445 if (fe->ops.tuner_ops.get_if_frequency) { 446 u32 if_freq; 447 448 ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_freq); 449 if (ret) 450 goto err; 451 452 ret = rtl2832_set_if(fe, if_freq); 453 if (ret) 454 goto err; 455 } 456 457 switch (c->bandwidth_hz) { 458 case 6000000: 459 i = 0; 460 bw_mode = 48000000; 461 break; 462 case 7000000: 463 i = 1; 464 bw_mode = 56000000; 465 break; 466 case 8000000: 467 i = 2; 468 bw_mode = 64000000; 469 break; 470 default: 471 dev_err(&client->dev, "invalid bandwidth_hz %u\n", 472 c->bandwidth_hz); 473 ret = -EINVAL; 474 goto err; 475 } 476 477 for (j = 0; j < sizeof(bw_params[0]); j++) { 478 ret = regmap_bulk_write(dev->regmap, 479 0x11c + j, &bw_params[i][j], 1); 480 if (ret) 481 goto err; 482 } 483 484 /* calculate and set resample ratio 485 * RSAMP_RATIO = floor(CrystalFreqHz * 7 * pow(2, 22) 486 * / ConstWithBandwidthMode) 487 */ 488 num = dev->pdata->clk * 7ULL; 489 num *= 0x400000; 490 num = div_u64(num, bw_mode); 491 resamp_ratio = num & 0x3ffffff; 492 ret = rtl2832_wr_demod_reg(dev, DVBT_RSAMP_RATIO, resamp_ratio); 493 if (ret) 494 goto err; 495 496 /* calculate and set cfreq off ratio 497 * CFREQ_OFF_RATIO = - floor(ConstWithBandwidthMode * pow(2, 20) 498 * / (CrystalFreqHz * 7)) 499 */ 500 num = bw_mode << 20; 501 num2 = dev->pdata->clk * 7ULL; 502 num = div_u64(num, num2); 503 num = -num; 504 cfreq_off_ratio = num & 0xfffff; 505 ret = rtl2832_wr_demod_reg(dev, DVBT_CFREQ_OFF_RATIO, cfreq_off_ratio); 506 if (ret) 507 goto err; 508 509 /* soft reset */ 510 ret = rtl2832_wr_demod_reg(dev, DVBT_SOFT_RST, 0x1); 511 if (ret) 512 goto err; 513 514 ret = rtl2832_wr_demod_reg(dev, DVBT_SOFT_RST, 0x0); 515 if (ret) 516 goto err; 517 518 return 0; 519 err: 520 dev_dbg(&client->dev, "failed=%d\n", ret); 521 return ret; 522 } 523 524 static int rtl2832_get_frontend(struct dvb_frontend *fe, 525 struct dtv_frontend_properties *c) 526 { 527 struct rtl2832_dev *dev = fe->demodulator_priv; 528 struct i2c_client *client = dev->client; 529 int ret; 530 u8 buf[3]; 531 532 if (dev->sleeping) 533 return 0; 534 535 ret = regmap_bulk_read(dev->regmap, 0x33c, buf, 2); 536 if (ret) 537 goto err; 538 539 ret = regmap_bulk_read(dev->regmap, 0x351, &buf[2], 1); 540 if (ret) 541 goto err; 542 543 dev_dbg(&client->dev, "TPS=%*ph\n", 3, buf); 544 545 switch ((buf[0] >> 2) & 3) { 546 case 0: 547 c->modulation = QPSK; 548 break; 549 case 1: 550 c->modulation = QAM_16; 551 break; 552 case 2: 553 c->modulation = QAM_64; 554 break; 555 } 556 557 switch ((buf[2] >> 2) & 1) { 558 case 0: 559 c->transmission_mode = TRANSMISSION_MODE_2K; 560 break; 561 case 1: 562 c->transmission_mode = TRANSMISSION_MODE_8K; 563 } 564 565 switch ((buf[2] >> 0) & 3) { 566 case 0: 567 c->guard_interval = GUARD_INTERVAL_1_32; 568 break; 569 case 1: 570 c->guard_interval = GUARD_INTERVAL_1_16; 571 break; 572 case 2: 573 c->guard_interval = GUARD_INTERVAL_1_8; 574 break; 575 case 3: 576 c->guard_interval = GUARD_INTERVAL_1_4; 577 break; 578 } 579 580 switch ((buf[0] >> 4) & 7) { 581 case 0: 582 c->hierarchy = HIERARCHY_NONE; 583 break; 584 case 1: 585 c->hierarchy = HIERARCHY_1; 586 break; 587 case 2: 588 c->hierarchy = HIERARCHY_2; 589 break; 590 case 3: 591 c->hierarchy = HIERARCHY_4; 592 break; 593 } 594 595 switch ((buf[1] >> 3) & 7) { 596 case 0: 597 c->code_rate_HP = FEC_1_2; 598 break; 599 case 1: 600 c->code_rate_HP = FEC_2_3; 601 break; 602 case 2: 603 c->code_rate_HP = FEC_3_4; 604 break; 605 case 3: 606 c->code_rate_HP = FEC_5_6; 607 break; 608 case 4: 609 c->code_rate_HP = FEC_7_8; 610 break; 611 } 612 613 switch ((buf[1] >> 0) & 7) { 614 case 0: 615 c->code_rate_LP = FEC_1_2; 616 break; 617 case 1: 618 c->code_rate_LP = FEC_2_3; 619 break; 620 case 2: 621 c->code_rate_LP = FEC_3_4; 622 break; 623 case 3: 624 c->code_rate_LP = FEC_5_6; 625 break; 626 case 4: 627 c->code_rate_LP = FEC_7_8; 628 break; 629 } 630 631 return 0; 632 err: 633 dev_dbg(&client->dev, "failed=%d\n", ret); 634 return ret; 635 } 636 637 static int rtl2832_read_status(struct dvb_frontend *fe, enum fe_status *status) 638 { 639 struct rtl2832_dev *dev = fe->demodulator_priv; 640 struct i2c_client *client = dev->client; 641 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 642 int ret; 643 u32 tmp; 644 u8 u8tmp, buf[2]; 645 u16 u16tmp; 646 647 dev_dbg(&client->dev, "\n"); 648 649 *status = 0; 650 if (dev->sleeping) 651 return 0; 652 653 ret = rtl2832_rd_demod_reg(dev, DVBT_FSM_STAGE, &tmp); 654 if (ret) 655 goto err; 656 657 if (tmp == 11) { 658 *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | 659 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK; 660 } else if (tmp == 10) { 661 *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | 662 FE_HAS_VITERBI; 663 } 664 665 dev->fe_status = *status; 666 667 /* signal strength */ 668 if (dev->fe_status & FE_HAS_SIGNAL) { 669 /* read digital AGC */ 670 ret = regmap_bulk_read(dev->regmap, 0x305, &u8tmp, 1); 671 if (ret) 672 goto err; 673 674 dev_dbg(&client->dev, "digital agc=%02x", u8tmp); 675 676 u8tmp = ~u8tmp; 677 u16tmp = u8tmp << 8 | u8tmp << 0; 678 679 c->strength.stat[0].scale = FE_SCALE_RELATIVE; 680 c->strength.stat[0].uvalue = u16tmp; 681 } else { 682 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 683 } 684 685 /* CNR */ 686 if (dev->fe_status & FE_HAS_VITERBI) { 687 unsigned hierarchy, constellation; 688 #define CONSTELLATION_NUM 3 689 #define HIERARCHY_NUM 4 690 static const u32 constant[CONSTELLATION_NUM][HIERARCHY_NUM] = { 691 {85387325, 85387325, 85387325, 85387325}, 692 {86676178, 86676178, 87167949, 87795660}, 693 {87659938, 87659938, 87885178, 88241743}, 694 }; 695 696 ret = regmap_bulk_read(dev->regmap, 0x33c, &u8tmp, 1); 697 if (ret) 698 goto err; 699 700 constellation = (u8tmp >> 2) & 0x03; /* [3:2] */ 701 ret = -EINVAL; 702 if (constellation > CONSTELLATION_NUM - 1) 703 goto err; 704 705 hierarchy = (u8tmp >> 4) & 0x07; /* [6:4] */ 706 if (hierarchy > HIERARCHY_NUM - 1) 707 goto err; 708 709 ret = regmap_bulk_read(dev->regmap, 0x40c, buf, 2); 710 if (ret) 711 goto err; 712 713 u16tmp = buf[0] << 8 | buf[1] << 0; 714 if (u16tmp) 715 tmp = (constant[constellation][hierarchy] - 716 intlog10(u16tmp)) / ((1 << 24) / 10000); 717 else 718 tmp = 0; 719 720 dev_dbg(&client->dev, "cnr raw=%u\n", u16tmp); 721 722 c->cnr.stat[0].scale = FE_SCALE_DECIBEL; 723 c->cnr.stat[0].svalue = tmp; 724 } else { 725 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 726 } 727 728 /* BER */ 729 if (dev->fe_status & FE_HAS_LOCK) { 730 ret = regmap_bulk_read(dev->regmap, 0x34e, buf, 2); 731 if (ret) 732 goto err; 733 734 u16tmp = buf[0] << 8 | buf[1] << 0; 735 dev->post_bit_error += u16tmp; 736 dev->post_bit_count += 1000000; 737 738 dev_dbg(&client->dev, "ber errors=%u total=1000000\n", u16tmp); 739 740 c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER; 741 c->post_bit_error.stat[0].uvalue = dev->post_bit_error; 742 c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER; 743 c->post_bit_count.stat[0].uvalue = dev->post_bit_count; 744 } else { 745 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 746 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 747 } 748 749 return 0; 750 err: 751 dev_dbg(&client->dev, "failed=%d\n", ret); 752 return ret; 753 } 754 755 static int rtl2832_read_snr(struct dvb_frontend *fe, u16 *snr) 756 { 757 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 758 759 /* report SNR in resolution of 0.1 dB */ 760 if (c->cnr.stat[0].scale == FE_SCALE_DECIBEL) 761 *snr = div_s64(c->cnr.stat[0].svalue, 100); 762 else 763 *snr = 0; 764 765 return 0; 766 } 767 768 static int rtl2832_read_ber(struct dvb_frontend *fe, u32 *ber) 769 { 770 struct rtl2832_dev *dev = fe->demodulator_priv; 771 772 *ber = (dev->post_bit_error - dev->post_bit_error_prev); 773 dev->post_bit_error_prev = dev->post_bit_error; 774 775 return 0; 776 } 777 778 /* 779 * I2C gate/mux/repeater logic 780 * There is delay mechanism to avoid unneeded I2C gate open / close. Gate close 781 * is delayed here a little bit in order to see if there is sequence of I2C 782 * messages sent to same I2C bus. 783 */ 784 static void rtl2832_i2c_gate_work(struct work_struct *work) 785 { 786 struct rtl2832_dev *dev = container_of(work, struct rtl2832_dev, i2c_gate_work.work); 787 struct i2c_client *client = dev->client; 788 int ret; 789 790 /* close gate */ 791 ret = regmap_update_bits(dev->regmap, 0x101, 0x08, 0x00); 792 if (ret) 793 goto err; 794 795 return; 796 err: 797 dev_dbg(&client->dev, "failed=%d\n", ret); 798 } 799 800 static int rtl2832_select(struct i2c_mux_core *muxc, u32 chan_id) 801 { 802 struct rtl2832_dev *dev = i2c_mux_priv(muxc); 803 struct i2c_client *client = dev->client; 804 int ret; 805 806 /* terminate possible gate closing */ 807 cancel_delayed_work(&dev->i2c_gate_work); 808 809 /* open gate */ 810 ret = regmap_update_bits(dev->regmap, 0x101, 0x08, 0x08); 811 if (ret) 812 goto err; 813 814 return 0; 815 err: 816 dev_dbg(&client->dev, "failed=%d\n", ret); 817 return ret; 818 } 819 820 static int rtl2832_deselect(struct i2c_mux_core *muxc, u32 chan_id) 821 { 822 struct rtl2832_dev *dev = i2c_mux_priv(muxc); 823 824 schedule_delayed_work(&dev->i2c_gate_work, usecs_to_jiffies(100)); 825 return 0; 826 } 827 828 static const struct dvb_frontend_ops rtl2832_ops = { 829 .delsys = { SYS_DVBT }, 830 .info = { 831 .name = "Realtek RTL2832 (DVB-T)", 832 .frequency_min_hz = 174 * MHz, 833 .frequency_max_hz = 862 * MHz, 834 .frequency_stepsize_hz = 166667, 835 .caps = FE_CAN_FEC_1_2 | 836 FE_CAN_FEC_2_3 | 837 FE_CAN_FEC_3_4 | 838 FE_CAN_FEC_5_6 | 839 FE_CAN_FEC_7_8 | 840 FE_CAN_FEC_AUTO | 841 FE_CAN_QPSK | 842 FE_CAN_QAM_16 | 843 FE_CAN_QAM_64 | 844 FE_CAN_QAM_AUTO | 845 FE_CAN_TRANSMISSION_MODE_AUTO | 846 FE_CAN_GUARD_INTERVAL_AUTO | 847 FE_CAN_HIERARCHY_AUTO | 848 FE_CAN_RECOVER | 849 FE_CAN_MUTE_TS 850 }, 851 852 .init = rtl2832_init, 853 .sleep = rtl2832_sleep, 854 855 .get_tune_settings = rtl2832_get_tune_settings, 856 857 .set_frontend = rtl2832_set_frontend, 858 .get_frontend = rtl2832_get_frontend, 859 860 .read_status = rtl2832_read_status, 861 .read_snr = rtl2832_read_snr, 862 .read_ber = rtl2832_read_ber, 863 }; 864 865 static bool rtl2832_volatile_reg(struct device *dev, unsigned int reg) 866 { 867 switch (reg) { 868 case 0x305: 869 case 0x33c: 870 case 0x34e: 871 case 0x351: 872 case 0x40c ... 0x40d: 873 return true; 874 default: 875 break; 876 } 877 878 return false; 879 } 880 881 static struct dvb_frontend *rtl2832_get_dvb_frontend(struct i2c_client *client) 882 { 883 struct rtl2832_dev *dev = i2c_get_clientdata(client); 884 885 dev_dbg(&client->dev, "\n"); 886 return &dev->fe; 887 } 888 889 static struct i2c_adapter *rtl2832_get_i2c_adapter(struct i2c_client *client) 890 { 891 struct rtl2832_dev *dev = i2c_get_clientdata(client); 892 893 dev_dbg(&client->dev, "\n"); 894 return dev->muxc->adapter[0]; 895 } 896 897 static int rtl2832_slave_ts_ctrl(struct i2c_client *client, bool enable) 898 { 899 struct rtl2832_dev *dev = i2c_get_clientdata(client); 900 int ret; 901 902 dev_dbg(&client->dev, "enable=%d\n", enable); 903 904 if (enable) { 905 ret = rtl2832_wr_demod_reg(dev, DVBT_SOFT_RST, 0x0); 906 if (ret) 907 goto err; 908 ret = regmap_bulk_write(dev->regmap, 0x10c, "\x5f\xff", 2); 909 if (ret) 910 goto err; 911 ret = rtl2832_wr_demod_reg(dev, DVBT_PIP_ON, 0x1); 912 if (ret) 913 goto err; 914 ret = regmap_bulk_write(dev->regmap, 0x0bc, "\x18", 1); 915 if (ret) 916 goto err; 917 ret = regmap_bulk_write(dev->regmap, 0x192, "\x7f\xf7\xff", 3); 918 if (ret) 919 goto err; 920 } else { 921 ret = regmap_bulk_write(dev->regmap, 0x192, "\x00\x0f\xff", 3); 922 if (ret) 923 goto err; 924 ret = regmap_bulk_write(dev->regmap, 0x0bc, "\x08", 1); 925 if (ret) 926 goto err; 927 ret = rtl2832_wr_demod_reg(dev, DVBT_PIP_ON, 0x0); 928 if (ret) 929 goto err; 930 ret = regmap_bulk_write(dev->regmap, 0x10c, "\x00\x00", 2); 931 if (ret) 932 goto err; 933 ret = rtl2832_wr_demod_reg(dev, DVBT_SOFT_RST, 0x1); 934 if (ret) 935 goto err; 936 } 937 938 dev->slave_ts = enable; 939 940 return 0; 941 err: 942 dev_dbg(&client->dev, "failed=%d\n", ret); 943 return ret; 944 } 945 946 static int rtl2832_pid_filter_ctrl(struct dvb_frontend *fe, int onoff) 947 { 948 struct rtl2832_dev *dev = fe->demodulator_priv; 949 struct i2c_client *client = dev->client; 950 int ret; 951 u8 u8tmp; 952 953 dev_dbg(&client->dev, "onoff=%d, slave_ts=%d\n", onoff, dev->slave_ts); 954 955 /* enable / disable PID filter */ 956 if (onoff) 957 u8tmp = 0x80; 958 else 959 u8tmp = 0x00; 960 961 if (dev->slave_ts) 962 ret = regmap_update_bits(dev->regmap, 0x021, 0xc0, u8tmp); 963 else 964 ret = regmap_update_bits(dev->regmap, 0x061, 0xc0, u8tmp); 965 if (ret) 966 goto err; 967 968 return 0; 969 err: 970 dev_dbg(&client->dev, "failed=%d\n", ret); 971 return ret; 972 } 973 974 static int rtl2832_pid_filter(struct dvb_frontend *fe, u8 index, u16 pid, 975 int onoff) 976 { 977 struct rtl2832_dev *dev = fe->demodulator_priv; 978 struct i2c_client *client = dev->client; 979 int ret; 980 u8 buf[4]; 981 982 dev_dbg(&client->dev, "index=%d pid=%04x onoff=%d slave_ts=%d\n", 983 index, pid, onoff, dev->slave_ts); 984 985 /* skip invalid PIDs (0x2000) */ 986 if (pid > 0x1fff || index >= 32) 987 return 0; 988 989 if (onoff) 990 set_bit(index, &dev->filters); 991 else 992 clear_bit(index, &dev->filters); 993 994 /* enable / disable PIDs */ 995 buf[0] = (dev->filters >> 0) & 0xff; 996 buf[1] = (dev->filters >> 8) & 0xff; 997 buf[2] = (dev->filters >> 16) & 0xff; 998 buf[3] = (dev->filters >> 24) & 0xff; 999 1000 if (dev->slave_ts) 1001 ret = regmap_bulk_write(dev->regmap, 0x022, buf, 4); 1002 else 1003 ret = regmap_bulk_write(dev->regmap, 0x062, buf, 4); 1004 if (ret) 1005 goto err; 1006 1007 /* add PID */ 1008 buf[0] = (pid >> 8) & 0xff; 1009 buf[1] = (pid >> 0) & 0xff; 1010 1011 if (dev->slave_ts) 1012 ret = regmap_bulk_write(dev->regmap, 0x026 + 2 * index, buf, 2); 1013 else 1014 ret = regmap_bulk_write(dev->regmap, 0x066 + 2 * index, buf, 2); 1015 if (ret) 1016 goto err; 1017 1018 return 0; 1019 err: 1020 dev_dbg(&client->dev, "failed=%d\n", ret); 1021 return ret; 1022 } 1023 1024 static int rtl2832_probe(struct i2c_client *client) 1025 { 1026 struct rtl2832_platform_data *pdata = client->dev.platform_data; 1027 struct i2c_adapter *i2c = client->adapter; 1028 struct rtl2832_dev *dev; 1029 int ret; 1030 u8 tmp; 1031 static const struct regmap_range_cfg regmap_range_cfg[] = { 1032 { 1033 .selector_reg = 0x00, 1034 .selector_mask = 0xff, 1035 .selector_shift = 0, 1036 .window_start = 0, 1037 .window_len = 0x100, 1038 .range_min = 0 * 0x100, 1039 .range_max = 5 * 0x100, 1040 }, 1041 }; 1042 1043 dev_dbg(&client->dev, "\n"); 1044 1045 /* allocate memory for the internal state */ 1046 dev = kzalloc(sizeof(struct rtl2832_dev), GFP_KERNEL); 1047 if (dev == NULL) { 1048 ret = -ENOMEM; 1049 goto err; 1050 } 1051 1052 /* setup the state */ 1053 i2c_set_clientdata(client, dev); 1054 dev->client = client; 1055 dev->pdata = client->dev.platform_data; 1056 dev->sleeping = true; 1057 INIT_DELAYED_WORK(&dev->i2c_gate_work, rtl2832_i2c_gate_work); 1058 /* create regmap */ 1059 dev->regmap_config.reg_bits = 8; 1060 dev->regmap_config.val_bits = 8; 1061 dev->regmap_config.volatile_reg = rtl2832_volatile_reg; 1062 dev->regmap_config.max_register = 5 * 0x100; 1063 dev->regmap_config.ranges = regmap_range_cfg; 1064 dev->regmap_config.num_ranges = ARRAY_SIZE(regmap_range_cfg); 1065 dev->regmap_config.cache_type = REGCACHE_NONE; 1066 dev->regmap = regmap_init_i2c(client, &dev->regmap_config); 1067 if (IS_ERR(dev->regmap)) { 1068 ret = PTR_ERR(dev->regmap); 1069 goto err_kfree; 1070 } 1071 1072 /* check if the demod is there */ 1073 ret = regmap_bulk_read(dev->regmap, 0x000, &tmp, 1); 1074 if (ret) 1075 goto err_regmap_exit; 1076 1077 /* create muxed i2c adapter for demod tuner bus */ 1078 dev->muxc = i2c_mux_alloc(i2c, &i2c->dev, 1, 0, I2C_MUX_LOCKED, 1079 rtl2832_select, rtl2832_deselect); 1080 if (!dev->muxc) { 1081 ret = -ENOMEM; 1082 goto err_regmap_exit; 1083 } 1084 dev->muxc->priv = dev; 1085 ret = i2c_mux_add_adapter(dev->muxc, 0, 0); 1086 if (ret) 1087 goto err_regmap_exit; 1088 1089 /* create dvb_frontend */ 1090 memcpy(&dev->fe.ops, &rtl2832_ops, sizeof(struct dvb_frontend_ops)); 1091 dev->fe.demodulator_priv = dev; 1092 1093 /* setup callbacks */ 1094 pdata->get_dvb_frontend = rtl2832_get_dvb_frontend; 1095 pdata->get_i2c_adapter = rtl2832_get_i2c_adapter; 1096 pdata->slave_ts_ctrl = rtl2832_slave_ts_ctrl; 1097 pdata->pid_filter = rtl2832_pid_filter; 1098 pdata->pid_filter_ctrl = rtl2832_pid_filter_ctrl; 1099 pdata->regmap = dev->regmap; 1100 1101 dev_info(&client->dev, "Realtek RTL2832 successfully attached\n"); 1102 return 0; 1103 err_regmap_exit: 1104 regmap_exit(dev->regmap); 1105 err_kfree: 1106 kfree(dev); 1107 err: 1108 dev_dbg(&client->dev, "failed=%d\n", ret); 1109 return ret; 1110 } 1111 1112 static void rtl2832_remove(struct i2c_client *client) 1113 { 1114 struct rtl2832_dev *dev = i2c_get_clientdata(client); 1115 1116 dev_dbg(&client->dev, "\n"); 1117 1118 cancel_delayed_work_sync(&dev->i2c_gate_work); 1119 1120 i2c_mux_del_adapters(dev->muxc); 1121 1122 regmap_exit(dev->regmap); 1123 1124 kfree(dev); 1125 } 1126 1127 static const struct i2c_device_id rtl2832_id_table[] = { 1128 { "rtl2832" }, 1129 {} 1130 }; 1131 MODULE_DEVICE_TABLE(i2c, rtl2832_id_table); 1132 1133 static struct i2c_driver rtl2832_driver = { 1134 .driver = { 1135 .name = "rtl2832", 1136 .suppress_bind_attrs = true, 1137 }, 1138 .probe = rtl2832_probe, 1139 .remove = rtl2832_remove, 1140 .id_table = rtl2832_id_table, 1141 }; 1142 1143 module_i2c_driver(rtl2832_driver); 1144 1145 MODULE_AUTHOR("Thomas Mair <mair.thomas86@gmail.com>"); 1146 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); 1147 MODULE_DESCRIPTION("Realtek RTL2832 DVB-T demodulator driver"); 1148 MODULE_LICENSE("GPL"); 1149