diff options
Diffstat (limited to 'drivers/media/common/tuners/fc0013.c')
| -rw-r--r-- | drivers/media/common/tuners/fc0013.c | 562 |
1 files changed, 562 insertions, 0 deletions
diff --git a/drivers/media/common/tuners/fc0013.c b/drivers/media/common/tuners/fc0013.c new file mode 100644 index 000000000000..7398d7759e08 --- /dev/null +++ b/drivers/media/common/tuners/fc0013.c @@ -0,0 +1,562 @@ +/* + * Fitipower FC0013 tuner driver + * + * Copyright (C) 2012 Hans-Frieder Vogt <hfvogt@gmx.net> + * partially based on driver code from Fitipower + * Copyright (C) 2010 Fitipower Integrated Technology Inc + * + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +#include "fc0013.h" +#include "fc0013-priv.h" + +static int fc0013_writereg(struct fc0013_priv *priv, u8 reg, u8 val) +{ + u8 buf[2] = {reg, val}; + struct i2c_msg msg = { + .addr = priv->addr, .flags = 0, .buf = buf, .len = 2 + }; + + if (i2c_transfer(priv->i2c, &msg, 1) != 1) { + err("I2C write reg failed, reg: %02x, val: %02x", reg, val); + return -EREMOTEIO; + } + return 0; +} + +static int fc0013_readreg(struct fc0013_priv *priv, u8 reg, u8 *val) +{ + struct i2c_msg msg[2] = { + { .addr = priv->addr, .flags = 0, .buf = ®, .len = 1 }, + { .addr = priv->addr, .flags = I2C_M_RD, .buf = val, .len = 1 }, + }; + + if (i2c_transfer(priv->i2c, msg, 2) != 2) { + err("I2C read reg failed, reg: %02x", reg); + return -EREMOTEIO; + } + return 0; +} + +static int fc0013_release(struct dvb_frontend *fe) +{ + kfree(fe->tuner_priv); + fe->tuner_priv = NULL; + return 0; +} + +static int fc0013_init(struct dvb_frontend *fe) +{ + struct fc0013_priv *priv = fe->tuner_priv; + int i, ret = 0; + unsigned char reg[] = { + 0x00, /* reg. 0x00: dummy */ + 0x09, /* reg. 0x01 */ + 0x16, /* reg. 0x02 */ + 0x00, /* reg. 0x03 */ + 0x00, /* reg. 0x04 */ + 0x17, /* reg. 0x05 */ + 0x02, /* reg. 0x06 */ + 0x0a, /* reg. 0x07: CHECK */ + 0xff, /* reg. 0x08: AGC Clock divide by 256, AGC gain 1/256, + Loop Bw 1/8 */ + 0x6f, /* reg. 0x09: enable LoopThrough */ + 0xb8, /* reg. 0x0a: Disable LO Test Buffer */ + 0x82, /* reg. 0x0b: CHECK */ + 0xfc, /* reg. 0x0c: depending on AGC Up-Down mode, may need 0xf8 */ + 0x01, /* reg. 0x0d: AGC Not Forcing & LNA Forcing, may need 0x02 */ + 0x00, /* reg. 0x0e */ + 0x00, /* reg. 0x0f */ + 0x00, /* reg. 0x10 */ + 0x00, /* reg. 0x11 */ + 0x00, /* reg. 0x12 */ + 0x00, /* reg. 0x13 */ + 0x50, /* reg. 0x14: DVB-t High Gain, UHF. + Middle Gain: 0x48, Low Gain: 0x40 */ + 0x01, /* reg. 0x15 */ + }; + + switch (priv->xtal_freq) { + case FC_XTAL_27_MHZ: + case FC_XTAL_28_8_MHZ: + reg[0x07] |= 0x20; + break; + case FC_XTAL_36_MHZ: + default: + break; + } + + if (priv->dual_master) + reg[0x0c] |= 0x02; + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */ + + for (i = 1; i < sizeof(reg); i++) { + ret = fc0013_writereg(priv, i, reg[i]); + if (ret) + break; + } + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */ + + if (ret) + err("fc0013_writereg failed: %d", ret); + + return ret; +} + +static int fc0013_sleep(struct dvb_frontend *fe) +{ + /* nothing to do here */ + return 0; +} + +int fc0013_rc_cal_add(struct dvb_frontend *fe, int rc_val) +{ + struct fc0013_priv *priv = fe->tuner_priv; + int ret; + u8 rc_cal; + int val; + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */ + + /* push rc_cal value, get rc_cal value */ + ret = fc0013_writereg(priv, 0x10, 0x00); + if (ret) + goto error_out; + + /* get rc_cal value */ + ret = fc0013_readreg(priv, 0x10, &rc_cal); + if (ret) + goto error_out; + + rc_cal &= 0x0f; + + val = (int)rc_cal + rc_val; + + /* forcing rc_cal */ + ret = fc0013_writereg(priv, 0x0d, 0x11); + if (ret) + goto error_out; + + /* modify rc_cal value */ + if (val > 15) + ret = fc0013_writereg(priv, 0x10, 0x0f); + else if (val < 0) + ret = fc0013_writereg(priv, 0x10, 0x00); + else + ret = fc0013_writereg(priv, 0x10, (u8)val); + +error_out: + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */ + + return ret; +} +EXPORT_SYMBOL(fc0013_rc_cal_add); + +int fc0013_rc_cal_reset(struct dvb_frontend *fe) +{ + struct fc0013_priv *priv = fe->tuner_priv; + int ret; + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */ + + ret = fc0013_writereg(priv, 0x0d, 0x01); + if (!ret) + ret = fc0013_writereg(priv, 0x10, 0x00); + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */ + + return ret; +} +EXPORT_SYMBOL(fc0013_rc_cal_reset); + +static int fc0013_set_vhf_track(struct fc0013_priv *priv, u32 freq) +{ + int ret; + u8 tmp; + + ret = fc0013_readreg(priv, 0x1d, &tmp); + if (ret) + goto error_out; + tmp &= 0xe3; + if (freq <= 177500) { /* VHF Track: 7 */ + ret = fc0013_writereg(priv, 0x1d, tmp | 0x1c); + } else if (freq <= 184500) { /* VHF Track: 6 */ + ret = fc0013_writereg(priv, 0x1d, tmp | 0x18); + } else if (freq <= 191500) { /* VHF Track: 5 */ + ret = fc0013_writereg(priv, 0x1d, tmp | 0x14); + } else if (freq <= 198500) { /* VHF Track: 4 */ + ret = fc0013_writereg(priv, 0x1d, tmp | 0x10); + } else if (freq <= 205500) { /* VHF Track: 3 */ + ret = fc0013_writereg(priv, 0x1d, tmp | 0x0c); + } else if (freq <= 219500) { /* VHF Track: 2 */ + ret = fc0013_writereg(priv, 0x1d, tmp | 0x08); + } else if (freq < 300000) { /* VHF Track: 1 */ + ret = fc0013_writereg(priv, 0x1d, tmp | 0x04); + } else { /* UHF and GPS */ + ret = fc0013_writereg(priv, 0x1d, tmp | 0x1c); + } + if (ret) + goto error_out; +error_out: + return ret; +} + +static int fc0013_set_params(struct dvb_frontend *fe) +{ + struct fc0013_priv *priv = fe->tuner_priv; + int i, ret = 0; + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + u32 freq = p->frequency / 1000; + u32 delsys = p->delivery_system; + unsigned char reg[7], am, pm, multi, tmp; + unsigned long f_vco; + unsigned short xtal_freq_khz_2, xin, xdiv; + int vco_select = false; + + if (fe->callback) { + ret = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER, + FC_FE_CALLBACK_VHF_ENABLE, (freq > 300000 ? 0 : 1)); + if (ret) + goto exit; + } + + switch (priv->xtal_freq) { + case FC_XTAL_27_MHZ: + xtal_freq_khz_2 = 27000 / 2; + break; + case FC_XTAL_36_MHZ: + xtal_freq_khz_2 = 36000 / 2; + break; + case FC_XTAL_28_8_MHZ: + default: + xtal_freq_khz_2 = 28800 / 2; + break; + } + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */ + + /* set VHF track */ + ret = fc0013_set_vhf_track(priv, freq); + if (ret) + goto exit; + + if (freq < 300000) { + /* enable VHF filter */ + ret = fc0013_readreg(priv, 0x07, &tmp); + if (ret) + goto exit; + ret = fc0013_writereg(priv, 0x07, tmp | 0x10); + if (ret) + goto exit; + + /* disable UHF & disable GPS */ + ret = fc0013_readreg(priv, 0x14, &tmp); + if (ret) + goto exit; + ret = fc0013_writereg(priv, 0x14, tmp & 0x1f); + if (ret) + goto exit; + } else if (freq <= 862000) { + /* disable VHF filter */ + ret = fc0013_readreg(priv, 0x07, &tmp); + if (ret) + goto exit; + ret = fc0013_writereg(priv, 0x07, tmp & 0xef); + if (ret) + goto exit; + + /* enable UHF & disable GPS */ + ret = fc0013_readreg(priv, 0x14, &tmp); + if (ret) + goto exit; + ret = fc0013_writereg(priv, 0x14, (tmp & 0x1f) | 0x40); + if (ret) + goto exit; + } else { + /* disable VHF filter */ + ret = fc0013_readreg(priv, 0x07, &tmp); + if (ret) + goto exit; + ret = fc0013_writereg(priv, 0x07, tmp & 0xef); + if (ret) + goto exit; + + /* disable UHF & enable GPS */ + ret = fc0013_readreg(priv, 0x14, &tmp); + if (ret) + goto exit; + ret = fc0013_writereg(priv, 0x14, (tmp & 0x1f) | 0x20); + if (ret) + goto exit; + } + + /* select frequency divider and the frequency of VCO */ + if (freq < 37084) { /* freq * 96 < 3560000 */ + multi = 96; + reg[5] = 0x82; + reg[6] = 0x00; + } else if (freq < 55625) { /* freq * 64 < 3560000 */ + multi = 64; + reg[5] = 0x02; + reg[6] = 0x02; + } else if (freq < 74167) { /* freq * 48 < 3560000 */ + multi = 48; + reg[5] = 0x42; + reg[6] = 0x00; + } else if (freq < 111250) { /* freq * 32 < 3560000 */ + multi = 32; + reg[5] = 0x82; + reg[6] = 0x02; + } else if (freq < 148334) { /* freq * 24 < 3560000 */ + multi = 24; + reg[5] = 0x22; + reg[6] = 0x00; + } else if (freq < 222500) { /* freq * 16 < 3560000 */ + multi = 16; + reg[5] = 0x42; + reg[6] = 0x02; + } else if (freq < 296667) { /* freq * 12 < 3560000 */ + multi = 12; + reg[5] = 0x12; + reg[6] = 0x00; + } else if (freq < 445000) { /* freq * 8 < 3560000 */ + multi = 8; + reg[5] = 0x22; + reg[6] = 0x02; + } else if (freq < 593334) { /* freq * 6 < 3560000 */ + multi = 6; + reg[5] = 0x0a; + reg[6] = 0x00; + } else if (freq < 950000) { /* freq * 4 < 3800000 */ + multi = 4; + reg[5] = 0x12; + reg[6] = 0x02; + } else { + multi = 2; + reg[5] = 0x0a; + reg[6] = 0x02; + } + + f_vco = freq * multi; + + if (f_vco >= 3060000) { + reg[6] |= 0x08; + vco_select = true; + } + + if (freq >= 45000) { + /* From divided value (XDIV) determined the FA and FP value */ + xdiv = (unsigned short)(f_vco / xtal_freq_khz_2); + if ((f_vco - xdiv * xtal_freq_khz_2) >= (xtal_freq_khz_2 / 2)) + xdiv++; + + pm = (unsigned char)(xdiv / 8); + am = (unsigned char)(xdiv - (8 * pm)); + + if (am < 2) { + reg[1] = am + 8; + reg[2] = pm - 1; + } else { + reg[1] = am; + reg[2] = pm; + } + } else { + /* fix for frequency less than 45 MHz */ + reg[1] = 0x06; + reg[2] = 0x11; + } + + /* fix clock out */ + reg[6] |= 0x20; + + /* From VCO frequency determines the XIN ( fractional part of Delta + Sigma PLL) and divided value (XDIV) */ + xin = (unsigned short)(f_vco - (f_vco / xtal_freq_khz_2) * xtal_freq_khz_2); + xin = (xin << 15) / xtal_freq_khz_2; + if (xin >= 16384) + xin += 32768; + + reg[3] = xin >> 8; + reg[4] = xin & 0xff; + + if (delsys == SYS_DVBT) { + reg[6] &= 0x3f; /* bits 6 and 7 describe the bandwidth */ + switch (p->bandwidth_hz) { + case 6000000: + reg[6] |= 0x80; + break; + case 7000000: + reg[6] |= 0x40; + break; + case 8000000: + default: + break; + } + } else { + err("%s: modulation type not supported!", __func__); + return -EINVAL; + } + + /* modified for Realtek demod */ + reg[5] |= 0x07; + + for (i = 1; i <= 6; i++) { + ret = fc0013_writereg(priv, i, reg[i]); + if (ret) + goto exit; + } + + ret = fc0013_readreg(priv, 0x11, &tmp); + if (ret) + goto exit; + if (multi == 64) + ret = fc0013_writereg(priv, 0x11, tmp | 0x04); + else + ret = fc0013_writereg(priv, 0x11, tmp & 0xfb); + if (ret) + goto exit; + + /* VCO Calibration */ + ret = fc0013_writereg(priv, 0x0e, 0x80); + if (!ret) + ret = fc0013_writereg(priv, 0x0e, 0x00); + + /* VCO Re-Calibration if needed */ + if (!ret) + ret = fc0013_writereg(priv, 0x0e, 0x00); + + if (!ret) { + msleep(10); + ret = fc0013_readreg(priv, 0x0e, &tmp); + } + if (ret) + goto exit; + + /* vco selection */ + tmp &= 0x3f; + + if (vco_select) { + if (tmp > 0x3c) { + reg[6] &= ~0x08; + ret = fc0013_writereg(priv, 0x06, reg[6]); + if (!ret) + ret = fc0013_writereg(priv, 0x0e, 0x80); + if (!ret) + ret = fc0013_writereg(priv, 0x0e, 0x00); + } + } else { + if (tmp < 0x02) { + reg[6] |= 0x08; + ret = fc0013_writereg(priv, 0x06, reg[6]); + if (!ret) + ret = fc0013_writereg(priv, 0x0e, 0x80); + if (!ret) + ret = fc0013_writereg(priv, 0x0e, 0x00); + } + } + + priv->frequency = p->frequency; + priv->bandwidth = p->bandwidth_hz; + +exit: + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */ + return ret; +} + +static int fc0013_get_frequency(struct dvb_frontend *fe, u32 *frequency) +{ + struct fc0013_priv *priv = fe->tuner_priv; + *frequency = priv->frequency; + return 0; +} + +static int fc0013_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) +{ + /* always ? */ + *frequency = 0; + return 0; +} + +static int fc0013_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth) +{ + struct fc0013_priv *priv = fe->tuner_priv; + *bandwidth = priv->bandwidth; + return 0; +} + + +static const struct dvb_tuner_ops fc0013_tuner_ops = { + .info = { + .name = "Fitipower FC0013", + + .frequency_min = 37000000, /* estimate */ + .frequency_max = 1680000000, /* CHECK */ + .frequency_step = 0, + }, + + .release = fc0013_release, + + .init = fc0013_init, + .sleep = fc0013_sleep, + + .set_params = fc0013_set_params, + + .get_frequency = fc0013_get_frequency, + .get_if_frequency = fc0013_get_if_frequency, + .get_bandwidth = fc0013_get_bandwidth, +}; + +struct dvb_frontend *fc0013_attach(struct dvb_frontend *fe, + struct i2c_adapter *i2c, u8 i2c_address, int dual_master, + enum fc001x_xtal_freq xtal_freq) +{ + struct fc0013_priv *priv = NULL; + + priv = kzalloc(sizeof(struct fc0013_priv), GFP_KERNEL); + if (priv == NULL) + return NULL; + + priv->i2c = i2c; + priv->dual_master = dual_master; + priv->addr = i2c_address; + priv->xtal_freq = xtal_freq; + + info("Fitipower FC0013 successfully attached."); + + fe->tuner_priv = priv; + + memcpy(&fe->ops.tuner_ops, &fc0013_tuner_ops, + sizeof(struct dvb_tuner_ops)); + + return fe; +} +EXPORT_SYMBOL(fc0013_attach); + +MODULE_DESCRIPTION("Fitipower FC0013 silicon tuner driver"); +MODULE_AUTHOR("Hans-Frieder Vogt <hfvogt@gmx.net>"); +MODULE_LICENSE("GPL"); +MODULE_VERSION("0.1"); |
