Antti Palosaari | ed85ada | 2012-09-01 21:09:21 -0300 | [diff] [blame] | 1 | /* |
| 2 | * Elonics E4000 silicon tuner driver |
| 3 | * |
| 4 | * Copyright (C) 2012 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 | #include "e4000_priv.h" |
| 22 | |
| 23 | /* write multiple registers */ |
| 24 | static int e4000_wr_regs(struct e4000_priv *priv, u8 reg, u8 *val, int len) |
| 25 | { |
| 26 | int ret; |
| 27 | u8 buf[1 + len]; |
| 28 | struct i2c_msg msg[1] = { |
| 29 | { |
| 30 | .addr = priv->cfg->i2c_addr, |
| 31 | .flags = 0, |
| 32 | .len = sizeof(buf), |
| 33 | .buf = buf, |
| 34 | } |
| 35 | }; |
| 36 | |
| 37 | buf[0] = reg; |
| 38 | memcpy(&buf[1], val, len); |
| 39 | |
| 40 | ret = i2c_transfer(priv->i2c, msg, 1); |
| 41 | if (ret == 1) { |
| 42 | ret = 0; |
| 43 | } else { |
Antti Palosaari | 4a337d5 | 2013-07-24 18:38:29 -0300 | [diff] [blame] | 44 | dev_warn(&priv->i2c->dev, |
| 45 | "%s: i2c wr failed=%d reg=%02x len=%d\n", |
| 46 | KBUILD_MODNAME, ret, reg, len); |
Antti Palosaari | ed85ada | 2012-09-01 21:09:21 -0300 | [diff] [blame] | 47 | ret = -EREMOTEIO; |
| 48 | } |
| 49 | return ret; |
| 50 | } |
| 51 | |
| 52 | /* read multiple registers */ |
| 53 | static int e4000_rd_regs(struct e4000_priv *priv, u8 reg, u8 *val, int len) |
| 54 | { |
| 55 | int ret; |
| 56 | u8 buf[len]; |
| 57 | struct i2c_msg msg[2] = { |
| 58 | { |
| 59 | .addr = priv->cfg->i2c_addr, |
| 60 | .flags = 0, |
| 61 | .len = 1, |
| 62 | .buf = ®, |
| 63 | }, { |
| 64 | .addr = priv->cfg->i2c_addr, |
| 65 | .flags = I2C_M_RD, |
| 66 | .len = sizeof(buf), |
| 67 | .buf = buf, |
| 68 | } |
| 69 | }; |
| 70 | |
| 71 | ret = i2c_transfer(priv->i2c, msg, 2); |
| 72 | if (ret == 2) { |
| 73 | memcpy(val, buf, len); |
| 74 | ret = 0; |
| 75 | } else { |
Antti Palosaari | 4a337d5 | 2013-07-24 18:38:29 -0300 | [diff] [blame] | 76 | dev_warn(&priv->i2c->dev, |
| 77 | "%s: i2c rd failed=%d reg=%02x len=%d\n", |
| 78 | KBUILD_MODNAME, ret, reg, len); |
Antti Palosaari | ed85ada | 2012-09-01 21:09:21 -0300 | [diff] [blame] | 79 | ret = -EREMOTEIO; |
| 80 | } |
| 81 | |
| 82 | return ret; |
| 83 | } |
| 84 | |
| 85 | /* write single register */ |
| 86 | static int e4000_wr_reg(struct e4000_priv *priv, u8 reg, u8 val) |
| 87 | { |
| 88 | return e4000_wr_regs(priv, reg, &val, 1); |
| 89 | } |
| 90 | |
| 91 | /* read single register */ |
| 92 | static int e4000_rd_reg(struct e4000_priv *priv, u8 reg, u8 *val) |
| 93 | { |
| 94 | return e4000_rd_regs(priv, reg, val, 1); |
| 95 | } |
| 96 | |
| 97 | static int e4000_init(struct dvb_frontend *fe) |
| 98 | { |
| 99 | struct e4000_priv *priv = fe->tuner_priv; |
| 100 | int ret; |
| 101 | |
| 102 | dev_dbg(&priv->i2c->dev, "%s:\n", __func__); |
| 103 | |
| 104 | if (fe->ops.i2c_gate_ctrl) |
| 105 | fe->ops.i2c_gate_ctrl(fe, 1); |
| 106 | |
| 107 | /* dummy I2C to ensure I2C wakes up */ |
| 108 | ret = e4000_wr_reg(priv, 0x02, 0x40); |
| 109 | |
| 110 | /* reset */ |
| 111 | ret = e4000_wr_reg(priv, 0x00, 0x01); |
| 112 | if (ret < 0) |
| 113 | goto err; |
| 114 | |
| 115 | /* disable output clock */ |
| 116 | ret = e4000_wr_reg(priv, 0x06, 0x00); |
| 117 | if (ret < 0) |
| 118 | goto err; |
| 119 | |
| 120 | ret = e4000_wr_reg(priv, 0x7a, 0x96); |
| 121 | if (ret < 0) |
| 122 | goto err; |
| 123 | |
| 124 | /* configure gains */ |
| 125 | ret = e4000_wr_regs(priv, 0x7e, "\x01\xfe", 2); |
| 126 | if (ret < 0) |
| 127 | goto err; |
| 128 | |
| 129 | ret = e4000_wr_reg(priv, 0x82, 0x00); |
| 130 | if (ret < 0) |
| 131 | goto err; |
| 132 | |
| 133 | ret = e4000_wr_reg(priv, 0x24, 0x05); |
| 134 | if (ret < 0) |
| 135 | goto err; |
| 136 | |
| 137 | ret = e4000_wr_regs(priv, 0x87, "\x20\x01", 2); |
| 138 | if (ret < 0) |
| 139 | goto err; |
| 140 | |
| 141 | ret = e4000_wr_regs(priv, 0x9f, "\x7f\x07", 2); |
| 142 | if (ret < 0) |
| 143 | goto err; |
| 144 | |
Antti Palosaari | ed85ada | 2012-09-01 21:09:21 -0300 | [diff] [blame] | 145 | /* DC offset control */ |
Antti Palosaari | 8514611 | 2013-07-24 02:04:12 -0300 | [diff] [blame] | 146 | ret = e4000_wr_reg(priv, 0x2d, 0x1f); |
| 147 | if (ret < 0) |
| 148 | goto err; |
| 149 | |
| 150 | ret = e4000_wr_regs(priv, 0x70, "\x01\x01", 2); |
Antti Palosaari | ed85ada | 2012-09-01 21:09:21 -0300 | [diff] [blame] | 151 | if (ret < 0) |
| 152 | goto err; |
| 153 | |
| 154 | /* gain control */ |
| 155 | ret = e4000_wr_reg(priv, 0x1a, 0x17); |
| 156 | if (ret < 0) |
| 157 | goto err; |
| 158 | |
| 159 | ret = e4000_wr_reg(priv, 0x1f, 0x1a); |
| 160 | if (ret < 0) |
| 161 | goto err; |
| 162 | |
| 163 | if (fe->ops.i2c_gate_ctrl) |
| 164 | fe->ops.i2c_gate_ctrl(fe, 0); |
| 165 | |
| 166 | return 0; |
| 167 | err: |
| 168 | if (fe->ops.i2c_gate_ctrl) |
| 169 | fe->ops.i2c_gate_ctrl(fe, 0); |
| 170 | |
| 171 | dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); |
| 172 | return ret; |
| 173 | } |
| 174 | |
| 175 | static int e4000_sleep(struct dvb_frontend *fe) |
| 176 | { |
| 177 | struct e4000_priv *priv = fe->tuner_priv; |
| 178 | int ret; |
| 179 | |
| 180 | dev_dbg(&priv->i2c->dev, "%s:\n", __func__); |
| 181 | |
| 182 | if (fe->ops.i2c_gate_ctrl) |
| 183 | fe->ops.i2c_gate_ctrl(fe, 1); |
| 184 | |
| 185 | ret = e4000_wr_reg(priv, 0x00, 0x00); |
| 186 | if (ret < 0) |
| 187 | goto err; |
| 188 | |
| 189 | if (fe->ops.i2c_gate_ctrl) |
| 190 | fe->ops.i2c_gate_ctrl(fe, 0); |
| 191 | |
| 192 | return 0; |
| 193 | err: |
| 194 | if (fe->ops.i2c_gate_ctrl) |
| 195 | fe->ops.i2c_gate_ctrl(fe, 0); |
| 196 | |
| 197 | dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); |
| 198 | return ret; |
| 199 | } |
| 200 | |
| 201 | static int e4000_set_params(struct dvb_frontend *fe) |
| 202 | { |
| 203 | struct e4000_priv *priv = fe->tuner_priv; |
| 204 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| 205 | int ret, i, sigma_delta; |
Antti Palosaari | 4a337d5 | 2013-07-24 18:38:29 -0300 | [diff] [blame] | 206 | unsigned int f_vco; |
Antti Palosaari | 8514611 | 2013-07-24 02:04:12 -0300 | [diff] [blame] | 207 | u8 buf[5], i_data[4], q_data[4]; |
Antti Palosaari | ed85ada | 2012-09-01 21:09:21 -0300 | [diff] [blame] | 208 | |
Antti Palosaari | 4a337d5 | 2013-07-24 18:38:29 -0300 | [diff] [blame] | 209 | dev_dbg(&priv->i2c->dev, |
| 210 | "%s: delivery_system=%d frequency=%d bandwidth_hz=%d\n", |
| 211 | __func__, c->delivery_system, c->frequency, |
| 212 | c->bandwidth_hz); |
Antti Palosaari | ed85ada | 2012-09-01 21:09:21 -0300 | [diff] [blame] | 213 | |
| 214 | if (fe->ops.i2c_gate_ctrl) |
| 215 | fe->ops.i2c_gate_ctrl(fe, 1); |
| 216 | |
| 217 | /* gain control manual */ |
| 218 | ret = e4000_wr_reg(priv, 0x1a, 0x00); |
| 219 | if (ret < 0) |
| 220 | goto err; |
| 221 | |
| 222 | /* PLL */ |
| 223 | for (i = 0; i < ARRAY_SIZE(e4000_pll_lut); i++) { |
| 224 | if (c->frequency <= e4000_pll_lut[i].freq) |
| 225 | break; |
| 226 | } |
| 227 | |
| 228 | if (i == ARRAY_SIZE(e4000_pll_lut)) |
| 229 | goto err; |
| 230 | |
| 231 | /* |
Antti Palosaari | 4a337d5 | 2013-07-24 18:38:29 -0300 | [diff] [blame] | 232 | * Note: Currently f_vco overflows when c->frequency is 1 073 741 824 Hz |
Antti Palosaari | ed85ada | 2012-09-01 21:09:21 -0300 | [diff] [blame] | 233 | * or more. |
| 234 | */ |
Antti Palosaari | 4a337d5 | 2013-07-24 18:38:29 -0300 | [diff] [blame] | 235 | f_vco = c->frequency * e4000_pll_lut[i].mul; |
| 236 | sigma_delta = 0x10000UL * (f_vco % priv->cfg->clock) / priv->cfg->clock; |
| 237 | buf[0] = f_vco / priv->cfg->clock; |
Antti Palosaari | ed85ada | 2012-09-01 21:09:21 -0300 | [diff] [blame] | 238 | buf[1] = (sigma_delta >> 0) & 0xff; |
| 239 | buf[2] = (sigma_delta >> 8) & 0xff; |
| 240 | buf[3] = 0x00; |
| 241 | buf[4] = e4000_pll_lut[i].div; |
| 242 | |
Antti Palosaari | 4a337d5 | 2013-07-24 18:38:29 -0300 | [diff] [blame] | 243 | dev_dbg(&priv->i2c->dev, "%s: f_vco=%u pll div=%d sigma_delta=%04x\n", |
| 244 | __func__, f_vco, buf[0], sigma_delta); |
Antti Palosaari | ed85ada | 2012-09-01 21:09:21 -0300 | [diff] [blame] | 245 | |
| 246 | ret = e4000_wr_regs(priv, 0x09, buf, 5); |
| 247 | if (ret < 0) |
| 248 | goto err; |
| 249 | |
| 250 | /* LNA filter (RF filter) */ |
| 251 | for (i = 0; i < ARRAY_SIZE(e400_lna_filter_lut); i++) { |
| 252 | if (c->frequency <= e400_lna_filter_lut[i].freq) |
| 253 | break; |
| 254 | } |
| 255 | |
| 256 | if (i == ARRAY_SIZE(e400_lna_filter_lut)) |
| 257 | goto err; |
| 258 | |
| 259 | ret = e4000_wr_reg(priv, 0x10, e400_lna_filter_lut[i].val); |
| 260 | if (ret < 0) |
| 261 | goto err; |
| 262 | |
| 263 | /* IF filters */ |
| 264 | for (i = 0; i < ARRAY_SIZE(e4000_if_filter_lut); i++) { |
| 265 | if (c->bandwidth_hz <= e4000_if_filter_lut[i].freq) |
| 266 | break; |
| 267 | } |
| 268 | |
| 269 | if (i == ARRAY_SIZE(e4000_if_filter_lut)) |
| 270 | goto err; |
| 271 | |
| 272 | buf[0] = e4000_if_filter_lut[i].reg11_val; |
| 273 | buf[1] = e4000_if_filter_lut[i].reg12_val; |
| 274 | |
| 275 | ret = e4000_wr_regs(priv, 0x11, buf, 2); |
| 276 | if (ret < 0) |
| 277 | goto err; |
| 278 | |
| 279 | /* frequency band */ |
| 280 | for (i = 0; i < ARRAY_SIZE(e4000_band_lut); i++) { |
| 281 | if (c->frequency <= e4000_band_lut[i].freq) |
| 282 | break; |
| 283 | } |
| 284 | |
| 285 | if (i == ARRAY_SIZE(e4000_band_lut)) |
| 286 | goto err; |
| 287 | |
| 288 | ret = e4000_wr_reg(priv, 0x07, e4000_band_lut[i].reg07_val); |
| 289 | if (ret < 0) |
| 290 | goto err; |
| 291 | |
| 292 | ret = e4000_wr_reg(priv, 0x78, e4000_band_lut[i].reg78_val); |
| 293 | if (ret < 0) |
| 294 | goto err; |
| 295 | |
Antti Palosaari | 8514611 | 2013-07-24 02:04:12 -0300 | [diff] [blame] | 296 | /* DC offset */ |
| 297 | for (i = 0; i < 4; i++) { |
| 298 | if (i == 0) |
| 299 | ret = e4000_wr_regs(priv, 0x15, "\x00\x7e\x24", 3); |
| 300 | else if (i == 1) |
| 301 | ret = e4000_wr_regs(priv, 0x15, "\x00\x7f", 2); |
| 302 | else if (i == 2) |
| 303 | ret = e4000_wr_regs(priv, 0x15, "\x01", 1); |
| 304 | else |
| 305 | ret = e4000_wr_regs(priv, 0x16, "\x7e", 1); |
| 306 | |
| 307 | if (ret < 0) |
| 308 | goto err; |
| 309 | |
| 310 | ret = e4000_wr_reg(priv, 0x29, 0x01); |
| 311 | if (ret < 0) |
| 312 | goto err; |
| 313 | |
| 314 | ret = e4000_rd_regs(priv, 0x2a, buf, 3); |
| 315 | if (ret < 0) |
| 316 | goto err; |
| 317 | |
| 318 | i_data[i] = (((buf[2] >> 0) & 0x3) << 6) | (buf[0] & 0x3f); |
| 319 | q_data[i] = (((buf[2] >> 4) & 0x3) << 6) | (buf[1] & 0x3f); |
| 320 | } |
| 321 | |
Antti Palosaari | d4992da | 2013-07-24 18:33:51 -0300 | [diff] [blame] | 322 | swap(q_data[2], q_data[3]); |
| 323 | swap(i_data[2], i_data[3]); |
| 324 | |
| 325 | ret = e4000_wr_regs(priv, 0x50, q_data, 4); |
Antti Palosaari | 8514611 | 2013-07-24 02:04:12 -0300 | [diff] [blame] | 326 | if (ret < 0) |
| 327 | goto err; |
| 328 | |
Antti Palosaari | d4992da | 2013-07-24 18:33:51 -0300 | [diff] [blame] | 329 | ret = e4000_wr_regs(priv, 0x60, i_data, 4); |
Antti Palosaari | 8514611 | 2013-07-24 02:04:12 -0300 | [diff] [blame] | 330 | if (ret < 0) |
| 331 | goto err; |
| 332 | |
Antti Palosaari | ed85ada | 2012-09-01 21:09:21 -0300 | [diff] [blame] | 333 | /* gain control auto */ |
| 334 | ret = e4000_wr_reg(priv, 0x1a, 0x17); |
| 335 | if (ret < 0) |
| 336 | goto err; |
| 337 | |
| 338 | if (fe->ops.i2c_gate_ctrl) |
| 339 | fe->ops.i2c_gate_ctrl(fe, 0); |
| 340 | |
| 341 | return 0; |
| 342 | err: |
| 343 | if (fe->ops.i2c_gate_ctrl) |
| 344 | fe->ops.i2c_gate_ctrl(fe, 0); |
| 345 | |
| 346 | dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); |
| 347 | return ret; |
| 348 | } |
| 349 | |
| 350 | static int e4000_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) |
| 351 | { |
| 352 | struct e4000_priv *priv = fe->tuner_priv; |
| 353 | |
| 354 | dev_dbg(&priv->i2c->dev, "%s:\n", __func__); |
| 355 | |
| 356 | *frequency = 0; /* Zero-IF */ |
| 357 | |
| 358 | return 0; |
| 359 | } |
| 360 | |
| 361 | static int e4000_release(struct dvb_frontend *fe) |
| 362 | { |
| 363 | struct e4000_priv *priv = fe->tuner_priv; |
| 364 | |
| 365 | dev_dbg(&priv->i2c->dev, "%s:\n", __func__); |
| 366 | |
| 367 | kfree(fe->tuner_priv); |
| 368 | |
| 369 | return 0; |
| 370 | } |
| 371 | |
| 372 | static const struct dvb_tuner_ops e4000_tuner_ops = { |
| 373 | .info = { |
| 374 | .name = "Elonics E4000", |
| 375 | .frequency_min = 174000000, |
| 376 | .frequency_max = 862000000, |
| 377 | }, |
| 378 | |
| 379 | .release = e4000_release, |
| 380 | |
| 381 | .init = e4000_init, |
| 382 | .sleep = e4000_sleep, |
| 383 | .set_params = e4000_set_params, |
| 384 | |
| 385 | .get_if_frequency = e4000_get_if_frequency, |
| 386 | }; |
| 387 | |
| 388 | struct dvb_frontend *e4000_attach(struct dvb_frontend *fe, |
| 389 | struct i2c_adapter *i2c, const struct e4000_config *cfg) |
| 390 | { |
| 391 | struct e4000_priv *priv; |
| 392 | int ret; |
| 393 | u8 chip_id; |
| 394 | |
| 395 | if (fe->ops.i2c_gate_ctrl) |
| 396 | fe->ops.i2c_gate_ctrl(fe, 1); |
| 397 | |
| 398 | priv = kzalloc(sizeof(struct e4000_priv), GFP_KERNEL); |
| 399 | if (!priv) { |
| 400 | ret = -ENOMEM; |
| 401 | dev_err(&i2c->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME); |
| 402 | goto err; |
| 403 | } |
| 404 | |
| 405 | priv->cfg = cfg; |
| 406 | priv->i2c = i2c; |
Antti Palosaari | ed85ada | 2012-09-01 21:09:21 -0300 | [diff] [blame] | 407 | |
| 408 | /* check if the tuner is there */ |
| 409 | ret = e4000_rd_reg(priv, 0x02, &chip_id); |
| 410 | if (ret < 0) |
| 411 | goto err; |
| 412 | |
| 413 | dev_dbg(&priv->i2c->dev, "%s: chip_id=%02x\n", __func__, chip_id); |
| 414 | |
| 415 | if (chip_id != 0x40) |
| 416 | goto err; |
| 417 | |
| 418 | /* put sleep as chip seems to be in normal mode by default */ |
| 419 | ret = e4000_wr_reg(priv, 0x00, 0x00); |
| 420 | if (ret < 0) |
| 421 | goto err; |
| 422 | |
| 423 | dev_info(&priv->i2c->dev, |
| 424 | "%s: Elonics E4000 successfully identified\n", |
| 425 | KBUILD_MODNAME); |
| 426 | |
Antti Palosaari | 36f647b | 2012-09-22 12:32:27 -0300 | [diff] [blame] | 427 | fe->tuner_priv = priv; |
| 428 | memcpy(&fe->ops.tuner_ops, &e4000_tuner_ops, |
| 429 | sizeof(struct dvb_tuner_ops)); |
| 430 | |
Antti Palosaari | ed85ada | 2012-09-01 21:09:21 -0300 | [diff] [blame] | 431 | if (fe->ops.i2c_gate_ctrl) |
| 432 | fe->ops.i2c_gate_ctrl(fe, 0); |
| 433 | |
| 434 | return fe; |
| 435 | err: |
| 436 | if (fe->ops.i2c_gate_ctrl) |
| 437 | fe->ops.i2c_gate_ctrl(fe, 0); |
| 438 | |
| 439 | dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret); |
| 440 | kfree(priv); |
| 441 | return NULL; |
| 442 | } |
| 443 | EXPORT_SYMBOL(e4000_attach); |
| 444 | |
| 445 | MODULE_DESCRIPTION("Elonics E4000 silicon tuner driver"); |
| 446 | MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); |
| 447 | MODULE_LICENSE("GPL"); |