1 /* 2 * Sony CXD2820R demodulator driver 3 * 4 * Copyright (C) 2010 Antti Palosaari <crope@iki.fi> 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 along 17 * with this program; if not, write to the Free Software Foundation, Inc., 18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 19 */ 20 21 22 #include "cxd2820r_priv.h" 23 24 int cxd2820r_set_frontend_c(struct dvb_frontend *fe) 25 { 26 struct cxd2820r_priv *priv = fe->demodulator_priv; 27 struct i2c_client *client = priv->client[0]; 28 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 29 int ret; 30 unsigned int utmp; 31 u8 buf[2]; 32 u32 if_frequency; 33 struct reg_val_mask tab[] = { 34 { 0x00080, 0x01, 0xff }, 35 { 0x00081, 0x05, 0xff }, 36 { 0x00085, 0x07, 0xff }, 37 { 0x00088, 0x01, 0xff }, 38 39 { 0x00082, 0x20, 0x60 }, 40 { 0x1016a, 0x48, 0xff }, 41 { 0x100a5, 0x00, 0x01 }, 42 { 0x10020, 0x06, 0x07 }, 43 { 0x10059, 0x50, 0xff }, 44 { 0x10087, 0x0c, 0x3c }, 45 { 0x1008b, 0x07, 0xff }, 46 { 0x1001f, priv->if_agc_polarity << 7, 0x80 }, 47 { 0x10070, priv->ts_mode, 0xff }, 48 { 0x10071, !priv->ts_clk_inv << 4, 0x10 }, 49 }; 50 51 dev_dbg(&client->dev, 52 "delivery_system=%d modulation=%d frequency=%u symbol_rate=%u inversion=%d\n", 53 c->delivery_system, c->modulation, c->frequency, 54 c->symbol_rate, c->inversion); 55 56 /* program tuner */ 57 if (fe->ops.tuner_ops.set_params) 58 fe->ops.tuner_ops.set_params(fe); 59 60 if (priv->delivery_system != SYS_DVBC_ANNEX_A) { 61 ret = cxd2820r_wr_reg_val_mask_tab(priv, tab, ARRAY_SIZE(tab)); 62 if (ret) 63 goto error; 64 } 65 66 priv->delivery_system = SYS_DVBC_ANNEX_A; 67 priv->ber_running = false; /* tune stops BER counter */ 68 69 /* program IF frequency */ 70 if (fe->ops.tuner_ops.get_if_frequency) { 71 ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency); 72 if (ret) 73 goto error; 74 dev_dbg(&client->dev, "if_frequency=%u\n", if_frequency); 75 } else { 76 ret = -EINVAL; 77 goto error; 78 } 79 80 utmp = 0x4000 - DIV_ROUND_CLOSEST_ULL((u64)if_frequency * 0x4000, CXD2820R_CLK); 81 buf[0] = (utmp >> 8) & 0xff; 82 buf[1] = (utmp >> 0) & 0xff; 83 ret = regmap_bulk_write(priv->regmap[1], 0x0042, buf, 2); 84 if (ret) 85 goto error; 86 87 ret = regmap_write(priv->regmap[0], 0x00ff, 0x08); 88 if (ret) 89 goto error; 90 91 ret = regmap_write(priv->regmap[0], 0x00fe, 0x01); 92 if (ret) 93 goto error; 94 95 return ret; 96 error: 97 dev_dbg(&client->dev, "failed=%d\n", ret); 98 return ret; 99 } 100 101 int cxd2820r_get_frontend_c(struct dvb_frontend *fe, 102 struct dtv_frontend_properties *c) 103 { 104 struct cxd2820r_priv *priv = fe->demodulator_priv; 105 struct i2c_client *client = priv->client[0]; 106 int ret; 107 unsigned int utmp; 108 u8 buf[2]; 109 110 dev_dbg(&client->dev, "\n"); 111 112 ret = regmap_bulk_read(priv->regmap[1], 0x001a, buf, 2); 113 if (ret) 114 goto error; 115 116 c->symbol_rate = 2500 * ((buf[0] & 0x0f) << 8 | buf[1]); 117 118 ret = regmap_read(priv->regmap[1], 0x0019, &utmp); 119 if (ret) 120 goto error; 121 122 switch ((utmp >> 0) & 0x07) { 123 case 0: 124 c->modulation = QAM_16; 125 break; 126 case 1: 127 c->modulation = QAM_32; 128 break; 129 case 2: 130 c->modulation = QAM_64; 131 break; 132 case 3: 133 c->modulation = QAM_128; 134 break; 135 case 4: 136 c->modulation = QAM_256; 137 break; 138 } 139 140 switch ((utmp >> 7) & 0x01) { 141 case 0: 142 c->inversion = INVERSION_OFF; 143 break; 144 case 1: 145 c->inversion = INVERSION_ON; 146 break; 147 } 148 149 return ret; 150 error: 151 dev_dbg(&client->dev, "failed=%d\n", ret); 152 return ret; 153 } 154 155 int cxd2820r_read_status_c(struct dvb_frontend *fe, enum fe_status *status) 156 { 157 struct cxd2820r_priv *priv = fe->demodulator_priv; 158 struct i2c_client *client = priv->client[0]; 159 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 160 int ret; 161 unsigned int utmp, utmp1, utmp2; 162 u8 buf[3]; 163 164 /* Lock detection */ 165 ret = regmap_bulk_read(priv->regmap[1], 0x0088, &buf[0], 1); 166 if (ret) 167 goto error; 168 ret = regmap_bulk_read(priv->regmap[1], 0x0073, &buf[1], 1); 169 if (ret) 170 goto error; 171 172 utmp1 = (buf[0] >> 0) & 0x01; 173 utmp2 = (buf[1] >> 3) & 0x01; 174 175 if (utmp1 == 1 && utmp2 == 1) { 176 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | 177 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK; 178 } else if (utmp1 == 1 || utmp2 == 1) { 179 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | 180 FE_HAS_VITERBI | FE_HAS_SYNC; 181 } else { 182 *status = 0; 183 } 184 185 dev_dbg(&client->dev, "status=%02x raw=%*ph sync=%u ts=%u\n", 186 *status, 2, buf, utmp1, utmp2); 187 188 /* Signal strength */ 189 if (*status & FE_HAS_SIGNAL) { 190 unsigned int strength; 191 192 ret = regmap_bulk_read(priv->regmap[1], 0x0049, buf, 2); 193 if (ret) 194 goto error; 195 196 utmp = buf[0] << 8 | buf[1] << 0; 197 utmp = 511 - sign_extend32(utmp, 9); 198 /* Scale value to 0x0000-0xffff */ 199 strength = utmp << 6 | utmp >> 4; 200 201 c->strength.len = 1; 202 c->strength.stat[0].scale = FE_SCALE_RELATIVE; 203 c->strength.stat[0].uvalue = strength; 204 } else { 205 c->strength.len = 1; 206 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 207 } 208 209 /* CNR */ 210 if (*status & FE_HAS_VITERBI) { 211 unsigned int cnr, const_a, const_b; 212 213 ret = regmap_read(priv->regmap[1], 0x0019, &utmp); 214 if (ret) 215 goto error; 216 217 if (((utmp >> 0) & 0x03) % 2) { 218 const_a = 8750; 219 const_b = 650; 220 } else { 221 const_a = 9500; 222 const_b = 760; 223 } 224 225 ret = regmap_read(priv->regmap[1], 0x004d, &utmp); 226 if (ret) 227 goto error; 228 229 #define CXD2820R_LOG2_E_24 24204406 /* log2(e) << 24 */ 230 if (utmp) 231 cnr = div_u64((u64)(intlog2(const_b) - intlog2(utmp)) 232 * const_a, CXD2820R_LOG2_E_24); 233 else 234 cnr = 0; 235 236 c->cnr.len = 1; 237 c->cnr.stat[0].scale = FE_SCALE_DECIBEL; 238 c->cnr.stat[0].svalue = cnr; 239 } else { 240 c->cnr.len = 1; 241 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 242 } 243 244 /* BER */ 245 if (*status & FE_HAS_SYNC) { 246 unsigned int post_bit_error; 247 bool start_ber; 248 249 if (priv->ber_running) { 250 ret = regmap_bulk_read(priv->regmap[1], 0x0076, buf, 3); 251 if (ret) 252 goto error; 253 254 if ((buf[2] >> 7) & 0x01) { 255 post_bit_error = buf[2] << 16 | buf[1] << 8 | 256 buf[0] << 0; 257 post_bit_error &= 0x0fffff; 258 start_ber = true; 259 } else { 260 post_bit_error = 0; 261 start_ber = false; 262 } 263 } else { 264 post_bit_error = 0; 265 start_ber = true; 266 } 267 268 if (start_ber) { 269 ret = regmap_write(priv->regmap[1], 0x0079, 0x01); 270 if (ret) 271 goto error; 272 priv->ber_running = true; 273 } 274 275 priv->post_bit_error += post_bit_error; 276 277 c->post_bit_error.len = 1; 278 c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER; 279 c->post_bit_error.stat[0].uvalue = priv->post_bit_error; 280 } else { 281 c->post_bit_error.len = 1; 282 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 283 } 284 285 return ret; 286 error: 287 dev_dbg(&client->dev, "failed=%d\n", ret); 288 return ret; 289 } 290 291 int cxd2820r_init_c(struct dvb_frontend *fe) 292 { 293 struct cxd2820r_priv *priv = fe->demodulator_priv; 294 struct i2c_client *client = priv->client[0]; 295 int ret; 296 297 dev_dbg(&client->dev, "\n"); 298 299 ret = regmap_write(priv->regmap[0], 0x0085, 0x07); 300 if (ret) 301 goto error; 302 303 return ret; 304 error: 305 dev_dbg(&client->dev, "failed=%d\n", ret); 306 return ret; 307 } 308 309 int cxd2820r_sleep_c(struct dvb_frontend *fe) 310 { 311 struct cxd2820r_priv *priv = fe->demodulator_priv; 312 struct i2c_client *client = priv->client[0]; 313 int ret; 314 struct reg_val_mask tab[] = { 315 { 0x000ff, 0x1f, 0xff }, 316 { 0x00085, 0x00, 0xff }, 317 { 0x00088, 0x01, 0xff }, 318 { 0x00081, 0x00, 0xff }, 319 { 0x00080, 0x00, 0xff }, 320 }; 321 322 dev_dbg(&client->dev, "\n"); 323 324 priv->delivery_system = SYS_UNDEFINED; 325 326 ret = cxd2820r_wr_reg_val_mask_tab(priv, tab, ARRAY_SIZE(tab)); 327 if (ret) 328 goto error; 329 330 return ret; 331 error: 332 dev_dbg(&client->dev, "failed=%d\n", ret); 333 return ret; 334 } 335 336 int cxd2820r_get_tune_settings_c(struct dvb_frontend *fe, 337 struct dvb_frontend_tune_settings *s) 338 { 339 s->min_delay_ms = 500; 340 s->step_size = 0; /* no zigzag */ 341 s->max_drift = 0; 342 343 return 0; 344 } 345