diff options
Diffstat (limited to 'drivers/media/tuners/fc2580.c')
| -rw-r--r-- | drivers/media/tuners/fc2580.c | 524 |
1 files changed, 524 insertions, 0 deletions
diff --git a/drivers/media/tuners/fc2580.c b/drivers/media/tuners/fc2580.c new file mode 100644 index 00000000000..afc04915f5a --- /dev/null +++ b/drivers/media/tuners/fc2580.c @@ -0,0 +1,524 @@ +/* + * FCI FC2580 silicon tuner driver + * + * Copyright (C) 2012 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. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "fc2580_priv.h" + +/* + * TODO: + * I2C write and read works only for one single register. Multiple registers + * could not be accessed using normal register address auto-increment. + * There could be (very likely) register to change that behavior.... + * + * Due to that limitation functions: + * fc2580_wr_regs() + * fc2580_rd_regs() + * could not be used for accessing more than one register at once. + * + * TODO: + * Currently it blind writes bunch of static registers from the + * fc2580_freq_regs_lut[] when fc2580_set_params() is called. Add some + * logic to reduce unneeded register writes. + * There is also don't-care registers, initialized with value 0xff, and those + * are also written to the chip currently (yes, not wise). + */ + +/* write multiple registers */ +static int fc2580_wr_regs(struct fc2580_priv *priv, u8 reg, u8 *val, int len) +{ + int ret; + u8 buf[1 + len]; + struct i2c_msg msg[1] = { + { + .addr = priv->cfg->i2c_addr, + .flags = 0, + .len = sizeof(buf), + .buf = buf, + } + }; + + buf[0] = reg; + memcpy(&buf[1], val, len); + + ret = i2c_transfer(priv->i2c, msg, 1); + 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 fc2580_rd_regs(struct fc2580_priv *priv, u8 reg, u8 *val, int len) +{ + int ret; + u8 buf[len]; + struct i2c_msg msg[2] = { + { + .addr = priv->cfg->i2c_addr, + .flags = 0, + .len = 1, + .buf = ®, + }, { + .addr = priv->cfg->i2c_addr, + .flags = I2C_M_RD, + .len = sizeof(buf), + .buf = buf, + } + }; + + ret = i2c_transfer(priv->i2c, msg, 2); + if (ret == 2) { + memcpy(val, buf, 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 fc2580_wr_reg(struct fc2580_priv *priv, u8 reg, u8 val) +{ + return fc2580_wr_regs(priv, reg, &val, 1); +} + +/* read single register */ +static int fc2580_rd_reg(struct fc2580_priv *priv, u8 reg, u8 *val) +{ + return fc2580_rd_regs(priv, reg, val, 1); +} + +static int fc2580_set_params(struct dvb_frontend *fe) +{ + struct fc2580_priv *priv = fe->tuner_priv; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + int ret, i; + unsigned int r_val, n_val, k_val, k_val_reg, f_ref; + u8 tmp_val, r18_val; + u64 f_vco; + + /* + * Fractional-N synthesizer/PLL. + * Most likely all those PLL calculations are not correct. I am not + * sure, but it looks like it is divider based Fractional-N synthesizer. + * There is divider for reference clock too? + * Anyhow, synthesizer calculation results seems to be quite correct. + */ + + dev_dbg(&priv->i2c->dev, "%s: delivery_system=%d frequency=%d " \ + "bandwidth_hz=%d\n", __func__, + c->delivery_system, c->frequency, c->bandwidth_hz); + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); + + /* PLL */ + for (i = 0; i < ARRAY_SIZE(fc2580_pll_lut); i++) { + if (c->frequency <= fc2580_pll_lut[i].freq) + break; + } + + if (i == ARRAY_SIZE(fc2580_pll_lut)) + goto err; + + f_vco = c->frequency; + f_vco *= fc2580_pll_lut[i].div; + + if (f_vco >= 2600000000) + tmp_val = 0x0e | fc2580_pll_lut[i].band; + else + tmp_val = 0x06 | fc2580_pll_lut[i].band; + + ret = fc2580_wr_reg(priv, 0x02, tmp_val); + if (ret < 0) + goto err; + + if (f_vco >= 2UL * 76 * priv->cfg->clock) { + r_val = 1; + r18_val = 0x00; + } else if (f_vco >= 1UL * 76 * priv->cfg->clock) { + r_val = 2; + r18_val = 0x10; + } else { + r_val = 4; + r18_val = 0x20; + } + + f_ref = 2UL * priv->cfg->clock / r_val; + n_val = f_vco / f_ref; + k_val = f_vco % f_ref; + k_val_reg = 1UL * k_val * (1 << 20) / f_ref; + + ret = fc2580_wr_reg(priv, 0x18, r18_val | ((k_val_reg >> 16) & 0xff)); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x1a, (k_val_reg >> 8) & 0xff); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x1b, (k_val_reg >> 0) & 0xff); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x1c, n_val); + if (ret < 0) + goto err; + + if (priv->cfg->clock >= 28000000) { + ret = fc2580_wr_reg(priv, 0x4b, 0x22); + if (ret < 0) + goto err; + } + + if (fc2580_pll_lut[i].band == 0x00) { + if (c->frequency <= 794000000) + tmp_val = 0x9f; + else + tmp_val = 0x8f; + + ret = fc2580_wr_reg(priv, 0x2d, tmp_val); + if (ret < 0) + goto err; + } + + /* registers */ + for (i = 0; i < ARRAY_SIZE(fc2580_freq_regs_lut); i++) { + if (c->frequency <= fc2580_freq_regs_lut[i].freq) + break; + } + + if (i == ARRAY_SIZE(fc2580_freq_regs_lut)) + goto err; + + ret = fc2580_wr_reg(priv, 0x25, fc2580_freq_regs_lut[i].r25_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x27, fc2580_freq_regs_lut[i].r27_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x28, fc2580_freq_regs_lut[i].r28_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x29, fc2580_freq_regs_lut[i].r29_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x2b, fc2580_freq_regs_lut[i].r2b_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x2c, fc2580_freq_regs_lut[i].r2c_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x2d, fc2580_freq_regs_lut[i].r2d_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x30, fc2580_freq_regs_lut[i].r30_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x44, fc2580_freq_regs_lut[i].r44_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x50, fc2580_freq_regs_lut[i].r50_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x53, fc2580_freq_regs_lut[i].r53_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x5f, fc2580_freq_regs_lut[i].r5f_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x61, fc2580_freq_regs_lut[i].r61_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x62, fc2580_freq_regs_lut[i].r62_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x63, fc2580_freq_regs_lut[i].r63_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x67, fc2580_freq_regs_lut[i].r67_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x68, fc2580_freq_regs_lut[i].r68_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x69, fc2580_freq_regs_lut[i].r69_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x6a, fc2580_freq_regs_lut[i].r6a_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x6b, fc2580_freq_regs_lut[i].r6b_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x6c, fc2580_freq_regs_lut[i].r6c_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x6d, fc2580_freq_regs_lut[i].r6d_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x6e, fc2580_freq_regs_lut[i].r6e_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x6f, fc2580_freq_regs_lut[i].r6f_val); + if (ret < 0) + goto err; + + /* IF filters */ + for (i = 0; i < ARRAY_SIZE(fc2580_if_filter_lut); i++) { + if (c->bandwidth_hz <= fc2580_if_filter_lut[i].freq) + break; + } + + if (i == ARRAY_SIZE(fc2580_if_filter_lut)) + goto err; + + ret = fc2580_wr_reg(priv, 0x36, fc2580_if_filter_lut[i].r36_val); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x37, 1UL * priv->cfg->clock * \ + fc2580_if_filter_lut[i].mul / 1000000000); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x39, fc2580_if_filter_lut[i].r39_val); + if (ret < 0) + goto err; + + /* calibration? */ + ret = fc2580_wr_reg(priv, 0x2e, 0x09); + if (ret < 0) + goto err; + + for (i = 0; i < 5; i++) { + ret = fc2580_rd_reg(priv, 0x2f, &tmp_val); + if (ret < 0) + goto err; + + /* done when [7:6] are set */ + if ((tmp_val & 0xc0) == 0xc0) + break; + + ret = fc2580_wr_reg(priv, 0x2e, 0x01); + if (ret < 0) + goto err; + + ret = fc2580_wr_reg(priv, 0x2e, 0x09); + if (ret < 0) + goto err; + + usleep_range(5000, 25000); + } + + dev_dbg(&priv->i2c->dev, "%s: loop=%i\n", __func__, i); + + ret = fc2580_wr_reg(priv, 0x2e, 0x01); + if (ret < 0) + goto err; + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + + return 0; +err: + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + + dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); + return ret; +} + +static int fc2580_init(struct dvb_frontend *fe) +{ + struct fc2580_priv *priv = fe->tuner_priv; + int ret, i; + + dev_dbg(&priv->i2c->dev, "%s:\n", __func__); + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); + + for (i = 0; i < ARRAY_SIZE(fc2580_init_reg_vals); i++) { + ret = fc2580_wr_reg(priv, fc2580_init_reg_vals[i].reg, + fc2580_init_reg_vals[i].val); + if (ret < 0) + goto err; + } + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + + return 0; +err: + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + + dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); + return ret; +} + +static int fc2580_sleep(struct dvb_frontend *fe) +{ + struct fc2580_priv *priv = fe->tuner_priv; + int ret; + + dev_dbg(&priv->i2c->dev, "%s:\n", __func__); + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); + + ret = fc2580_wr_reg(priv, 0x02, 0x0a); + if (ret < 0) + goto err; + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + + return 0; +err: + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + + dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); + return ret; +} + +static int fc2580_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) +{ + struct fc2580_priv *priv = fe->tuner_priv; + + dev_dbg(&priv->i2c->dev, "%s:\n", __func__); + + *frequency = 0; /* Zero-IF */ + + return 0; +} + +static int fc2580_release(struct dvb_frontend *fe) +{ + struct fc2580_priv *priv = fe->tuner_priv; + + dev_dbg(&priv->i2c->dev, "%s:\n", __func__); + + kfree(fe->tuner_priv); + + return 0; +} + +static const struct dvb_tuner_ops fc2580_tuner_ops = { + .info = { + .name = "FCI FC2580", + .frequency_min = 174000000, + .frequency_max = 862000000, + }, + + .release = fc2580_release, + + .init = fc2580_init, + .sleep = fc2580_sleep, + .set_params = fc2580_set_params, + + .get_if_frequency = fc2580_get_if_frequency, +}; + +struct dvb_frontend *fc2580_attach(struct dvb_frontend *fe, + struct i2c_adapter *i2c, const struct fc2580_config *cfg) +{ + struct fc2580_priv *priv; + int ret; + u8 chip_id; + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); + + priv = kzalloc(sizeof(struct fc2580_priv), GFP_KERNEL); + if (!priv) { + ret = -ENOMEM; + dev_err(&i2c->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME); + goto err; + } + + priv->cfg = cfg; + priv->i2c = i2c; + fe->tuner_priv = priv; + memcpy(&fe->ops.tuner_ops, &fc2580_tuner_ops, + sizeof(struct dvb_tuner_ops)); + + /* check if the tuner is there */ + ret = fc2580_rd_reg(priv, 0x01, &chip_id); + if (ret < 0) + goto err; + + dev_dbg(&priv->i2c->dev, "%s: chip_id=%02x\n", __func__, chip_id); + + if (chip_id != 0x56) + goto err; + + dev_info(&priv->i2c->dev, + "%s: FCI FC2580 successfully identified\n", + KBUILD_MODNAME); + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + + return fe; +err: + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + + dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret); + kfree(priv); + return NULL; +} +EXPORT_SYMBOL(fc2580_attach); + +MODULE_DESCRIPTION("FCI FC2580 silicon tuner driver"); +MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); +MODULE_LICENSE("GPL"); |