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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 | /* * NXP TDA18218HN silicon tuner driver * * Copyright (C) 2010 Antti Palosaari <crope@iki.fi> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include "tda18218_priv.h" /* Max transfer size done by I2C transfer functions */ #define MAX_XFER_SIZE 64 /* write multiple registers */ static int tda18218_wr_regs(struct tda18218_priv *priv, u8 reg, u8 *val, u8 len) { int ret = 0, len2, remaining; u8 buf[MAX_XFER_SIZE]; struct i2c_msg msg[1] = { { .addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, } }; if (1 + len > sizeof(buf)) { dev_warn(&priv->i2c->dev, "%s: i2c wr reg=%04x: len=%d is too big!\n", KBUILD_MODNAME, reg, len); return -EINVAL; } for (remaining = len; remaining > 0; remaining -= (priv->cfg->i2c_wr_max - 1)) { len2 = remaining; if (len2 > (priv->cfg->i2c_wr_max - 1)) len2 = (priv->cfg->i2c_wr_max - 1); msg[0].len = 1 + len2; buf[0] = reg + len - remaining; memcpy(&buf[1], &val[len - remaining], len2); ret = i2c_transfer(priv->i2c, msg, 1); if (ret != 1) break; } if (ret == 1) { ret = 0; } else { dev_warn(&priv->i2c->dev, "%s: i2c wr failed=%d reg=%02x " \ "len=%d\n", KBUILD_MODNAME, ret, reg, len); ret = -EREMOTEIO; } return ret; } /* read multiple registers */ static int tda18218_rd_regs(struct tda18218_priv *priv, u8 reg, u8 *val, u8 len) { int ret; u8 buf[MAX_XFER_SIZE]; /* we must start read always from reg 0x00 */ struct i2c_msg msg[2] = { { .addr = priv->cfg->i2c_address, .flags = 0, .len = 1, .buf = "\x00", }, { .addr = priv->cfg->i2c_address, .flags = I2C_M_RD, .len = reg + len, .buf = buf, } }; if (reg + len > sizeof(buf)) { dev_warn(&priv->i2c->dev, "%s: i2c wr reg=%04x: len=%d is too big!\n", KBUILD_MODNAME, reg, len); return -EINVAL; } ret = i2c_transfer(priv->i2c, msg, 2); if (ret == 2) { memcpy(val, &buf[reg], len); ret = 0; } else { dev_warn(&priv->i2c->dev, "%s: i2c rd failed=%d reg=%02x " \ "len=%d\n", KBUILD_MODNAME, ret, reg, len); ret = -EREMOTEIO; } return ret; } /* write single register */ static int tda18218_wr_reg(struct tda18218_priv *priv, u8 reg, u8 val) { return tda18218_wr_regs(priv, reg, &val, 1); } /* read single register */ static int tda18218_rd_reg(struct tda18218_priv *priv, u8 reg, u8 *val) { return tda18218_rd_regs(priv, reg, val, 1); } static int tda18218_set_params(struct dvb_frontend *fe) { struct tda18218_priv *priv = fe->tuner_priv; struct dtv_frontend_properties *c = &fe->dtv_property_cache; u32 bw = c->bandwidth_hz; int ret; u8 buf[3], i, BP_Filter, LP_Fc; u32 LO_Frac; /* TODO: find out correct AGC algorithm */ u8 agc[][2] = { { R20_AGC11, 0x60 }, { R23_AGC21, 0x02 }, { R20_AGC11, 0xa0 }, { R23_AGC21, 0x09 }, { R20_AGC11, 0xe0 }, { R23_AGC21, 0x0c }, { R20_AGC11, 0x40 }, { R23_AGC21, 0x01 }, { R20_AGC11, 0x80 }, { R23_AGC21, 0x08 }, { R20_AGC11, 0xc0 }, { R23_AGC21, 0x0b }, { R24_AGC22, 0x1c }, { R24_AGC22, 0x0c }, }; if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */ /* low-pass filter cut-off frequency */ if (bw <= 6000000) { LP_Fc = 0; priv->if_frequency = 3000000; } else if (bw <= 7000000) { LP_Fc = 1; priv->if_frequency = 3500000; } else { LP_Fc = 2; priv->if_frequency = 4000000; } LO_Frac = c->frequency + priv->if_frequency; /* band-pass filter */ if (LO_Frac < 188000000) BP_Filter = 3; else if (LO_Frac < 253000000) BP_Filter = 4; else if (LO_Frac < 343000000) BP_Filter = 5; else BP_Filter = 6; buf[0] = (priv->regs[R1A_IF1] & ~7) | BP_Filter; /* BP_Filter */ buf[1] = (priv->regs[R1B_IF2] & ~3) | LP_Fc; /* LP_Fc */ buf[2] = priv->regs[R1C_AGC2B]; ret = tda18218_wr_regs(priv, R1A_IF1, buf, 3); if (ret) goto error; buf[0] = (LO_Frac / 1000) >> 12; /* LO_Frac_0 */ buf[1] = (LO_Frac / 1000) >> 4; /* LO_Frac_1 */ buf[2] = (LO_Frac / 1000) << 4 | (priv->regs[R0C_MD5] & 0x0f); /* LO_Frac_2 */ ret = tda18218_wr_regs(priv, R0A_MD3, buf, 3); if (ret) goto error; buf[0] = priv->regs[R0F_MD8] | (1 << 6); /* Freq_prog_Start */ ret = tda18218_wr_regs(priv, R0F_MD8, buf, 1); if (ret) goto error; buf[0] = priv->regs[R0F_MD8] & ~(1 << 6); /* Freq_prog_Start */ ret = tda18218_wr_regs(priv, R0F_MD8, buf, 1); if (ret) goto error; /* trigger AGC */ for (i = 0; i < ARRAY_SIZE(agc); i++) { ret = tda18218_wr_reg(priv, agc[i][0], agc[i][1]); if (ret) goto error; } error: if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */ if (ret) dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); return ret; } static int tda18218_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) { struct tda18218_priv *priv = fe->tuner_priv; *frequency = priv->if_frequency; dev_dbg(&priv->i2c->dev, "%s: if_frequency=%d\n", __func__, *frequency); return 0; } static int tda18218_sleep(struct dvb_frontend *fe) { struct tda18218_priv *priv = fe->tuner_priv; int ret; if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */ /* standby */ ret = tda18218_wr_reg(priv, R17_PD1, priv->regs[R17_PD1] | (1 << 0)); if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */ if (ret) dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); return ret; } static int tda18218_init(struct dvb_frontend *fe) { struct tda18218_priv *priv = fe->tuner_priv; int ret; /* TODO: calibrations */ if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */ ret = tda18218_wr_regs(priv, R00_ID, priv->regs, TDA18218_NUM_REGS); if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */ if (ret) dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); return ret; } static void tda18218_release(struct dvb_frontend *fe) { kfree(fe->tuner_priv); fe->tuner_priv = NULL; } static const struct dvb_tuner_ops tda18218_tuner_ops = { .info = { .name = "NXP TDA18218", .frequency_min = 174000000, .frequency_max = 864000000, .frequency_step = 1000, }, .release = tda18218_release, .init = tda18218_init, .sleep = tda18218_sleep, .set_params = tda18218_set_params, .get_if_frequency = tda18218_get_if_frequency, }; struct dvb_frontend *tda18218_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, struct tda18218_config *cfg) { struct tda18218_priv *priv = NULL; u8 val; int ret; /* chip default registers values */ static u8 def_regs[] = { 0xc0, 0x88, 0x00, 0x8e, 0x03, 0x00, 0x00, 0xd0, 0x00, 0x40, 0x00, 0x00, 0x07, 0xff, 0x84, 0x09, 0x00, 0x13, 0x00, 0x00, 0x01, 0x84, 0x09, 0xf0, 0x19, 0x0a, 0x8e, 0x69, 0x98, 0x01, 0x00, 0x58, 0x10, 0x40, 0x8c, 0x00, 0x0c, 0x48, 0x85, 0xc9, 0xa7, 0x00, 0x00, 0x00, 0x30, 0x81, 0x80, 0x00, 0x39, 0x00, 0x8a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf6, 0xf6 }; priv = kzalloc(sizeof(struct tda18218_priv), GFP_KERNEL); if (priv == NULL) return NULL; priv->cfg = cfg; priv->i2c = i2c; fe->tuner_priv = priv; if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */ /* check if the tuner is there */ ret = tda18218_rd_reg(priv, R00_ID, &val); if (!ret) dev_dbg(&priv->i2c->dev, "%s: chip id=%02x\n", __func__, val); if (ret || val != def_regs[R00_ID]) { kfree(priv); return NULL; } dev_info(&priv->i2c->dev, "%s: NXP TDA18218HN successfully identified\n", KBUILD_MODNAME); memcpy(&fe->ops.tuner_ops, &tda18218_tuner_ops, sizeof(struct dvb_tuner_ops)); memcpy(priv->regs, def_regs, sizeof(def_regs)); /* loop-through enabled chip default register values */ if (priv->cfg->loop_through) { priv->regs[R17_PD1] = 0xb0; priv->regs[R18_PD2] = 0x59; } /* standby */ ret = tda18218_wr_reg(priv, R17_PD1, priv->regs[R17_PD1] | (1 << 0)); if (ret) dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */ return fe; } EXPORT_SYMBOL(tda18218_attach); MODULE_DESCRIPTION("NXP TDA18218HN silicon tuner driver"); MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); MODULE_LICENSE("GPL"); |