diff options
Diffstat (limited to 'drivers/media/dvb-frontends/af9013.c')
| -rw-r--r-- | drivers/media/dvb-frontends/af9013.c | 1524 |
1 files changed, 1524 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/af9013.c b/drivers/media/dvb-frontends/af9013.c new file mode 100644 index 0000000..5bc570d --- /dev/null +++ b/drivers/media/dvb-frontends/af9013.c @@ -0,0 +1,1524 @@ +/* + * Afatech AF9013 demodulator driver + * + * Copyright (C) 2007 Antti Palosaari <crope@iki.fi> + * Copyright (C) 2011 Antti Palosaari <crope@iki.fi> + * + * Thanks to Afatech who kindly provided information. + * + * 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 "af9013_priv.h" + +int af9013_debug; +module_param_named(debug, af9013_debug, int, 0644); +MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); + +struct af9013_state { + struct i2c_adapter *i2c; + struct dvb_frontend fe; + struct af9013_config config; + + /* tuner/demod RF and IF AGC limits used for signal strength calc */ + u8 signal_strength_en, rf_50, rf_80, if_50, if_80; + u16 signal_strength; + u32 ber; + u32 ucblocks; + u16 snr; + u32 bandwidth_hz; + fe_status_t fe_status; + unsigned long set_frontend_jiffies; + unsigned long read_status_jiffies; + bool first_tune; + bool i2c_gate_state; + unsigned int statistics_step:3; + struct delayed_work statistics_work; +}; + +/* write multiple registers */ +static int af9013_wr_regs_i2c(struct af9013_state *priv, u8 mbox, u16 reg, + const u8 *val, int len) +{ + int ret; + u8 buf[3+len]; + struct i2c_msg msg[1] = { + { + .addr = priv->config.i2c_addr, + .flags = 0, + .len = sizeof(buf), + .buf = buf, + } + }; + + buf[0] = (reg >> 8) & 0xff; + buf[1] = (reg >> 0) & 0xff; + buf[2] = mbox; + memcpy(&buf[3], val, len); + + ret = i2c_transfer(priv->i2c, msg, 1); + if (ret == 1) { + ret = 0; + } else { + warn("i2c wr failed=%d reg=%04x len=%d", ret, reg, len); + ret = -EREMOTEIO; + } + return ret; +} + +/* read multiple registers */ +static int af9013_rd_regs_i2c(struct af9013_state *priv, u8 mbox, u16 reg, + u8 *val, int len) +{ + int ret; + u8 buf[3]; + struct i2c_msg msg[2] = { + { + .addr = priv->config.i2c_addr, + .flags = 0, + .len = 3, + .buf = buf, + }, { + .addr = priv->config.i2c_addr, + .flags = I2C_M_RD, + .len = len, + .buf = val, + } + }; + + buf[0] = (reg >> 8) & 0xff; + buf[1] = (reg >> 0) & 0xff; + buf[2] = mbox; + + ret = i2c_transfer(priv->i2c, msg, 2); + if (ret == 2) { + ret = 0; + } else { + warn("i2c rd failed=%d reg=%04x len=%d", ret, reg, len); + ret = -EREMOTEIO; + } + return ret; +} + +/* write multiple registers */ +static int af9013_wr_regs(struct af9013_state *priv, u16 reg, const u8 *val, + int len) +{ + int ret, i; + u8 mbox = (0 << 7)|(0 << 6)|(1 << 1)|(1 << 0); + + if ((priv->config.ts_mode == AF9013_TS_USB) && + ((reg & 0xff00) != 0xff00) && ((reg & 0xff00) != 0xae00)) { + mbox |= ((len - 1) << 2); + ret = af9013_wr_regs_i2c(priv, mbox, reg, val, len); + } else { + for (i = 0; i < len; i++) { + ret = af9013_wr_regs_i2c(priv, mbox, reg+i, val+i, 1); + if (ret) + goto err; + } + } + +err: + return 0; +} + +/* read multiple registers */ +static int af9013_rd_regs(struct af9013_state *priv, u16 reg, u8 *val, int len) +{ + int ret, i; + u8 mbox = (0 << 7)|(0 << 6)|(1 << 1)|(0 << 0); + + if ((priv->config.ts_mode == AF9013_TS_USB) && + ((reg & 0xff00) != 0xff00) && ((reg & 0xff00) != 0xae00)) { + mbox |= ((len - 1) << 2); + ret = af9013_rd_regs_i2c(priv, mbox, reg, val, len); + } else { + for (i = 0; i < len; i++) { + ret = af9013_rd_regs_i2c(priv, mbox, reg+i, val+i, 1); + if (ret) + goto err; + } + } + +err: + return 0; +} + +/* write single register */ +static int af9013_wr_reg(struct af9013_state *priv, u16 reg, u8 val) +{ + return af9013_wr_regs(priv, reg, &val, 1); +} + +/* read single register */ +static int af9013_rd_reg(struct af9013_state *priv, u16 reg, u8 *val) +{ + return af9013_rd_regs(priv, reg, val, 1); +} + +static int af9013_write_ofsm_regs(struct af9013_state *state, u16 reg, u8 *val, + u8 len) +{ + u8 mbox = (1 << 7)|(1 << 6)|((len - 1) << 2)|(1 << 1)|(1 << 0); + return af9013_wr_regs_i2c(state, mbox, reg, val, len); +} + +static int af9013_wr_reg_bits(struct af9013_state *state, u16 reg, int pos, + int len, u8 val) +{ + int ret; + u8 tmp, mask; + + /* no need for read if whole reg is written */ + if (len != 8) { + ret = af9013_rd_reg(state, reg, &tmp); + if (ret) + return ret; + + mask = (0xff >> (8 - len)) << pos; + val <<= pos; + tmp &= ~mask; + val |= tmp; + } + + return af9013_wr_reg(state, reg, val); +} + +static int af9013_rd_reg_bits(struct af9013_state *state, u16 reg, int pos, + int len, u8 *val) +{ + int ret; + u8 tmp; + + ret = af9013_rd_reg(state, reg, &tmp); + if (ret) + return ret; + + *val = (tmp >> pos); + *val &= (0xff >> (8 - len)); + + return 0; +} + +static int af9013_set_gpio(struct af9013_state *state, u8 gpio, u8 gpioval) +{ + int ret; + u8 pos; + u16 addr; + + dbg("%s: gpio=%d gpioval=%02x", __func__, gpio, gpioval); + + /* + * GPIO0 & GPIO1 0xd735 + * GPIO2 & GPIO3 0xd736 + */ + + switch (gpio) { + case 0: + case 1: + addr = 0xd735; + break; + case 2: + case 3: + addr = 0xd736; + break; + + default: + err("invalid gpio:%d\n", gpio); + ret = -EINVAL; + goto err; + }; + + switch (gpio) { + case 0: + case 2: + pos = 0; + break; + case 1: + case 3: + default: + pos = 4; + break; + }; + + ret = af9013_wr_reg_bits(state, addr, pos, 4, gpioval); + if (ret) + goto err; + + return ret; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + +static u32 af913_div(u32 a, u32 b, u32 x) +{ + u32 r = 0, c = 0, i; + + dbg("%s: a=%d b=%d x=%d", __func__, a, b, x); + + if (a > b) { + c = a / b; + a = a - c * b; + } + + for (i = 0; i < x; i++) { + if (a >= b) { + r += 1; + a -= b; + } + a <<= 1; + r <<= 1; + } + r = (c << (u32)x) + r; + + dbg("%s: a=%d b=%d x=%d r=%x", __func__, a, b, x, r); + return r; +} + +static int af9013_power_ctrl(struct af9013_state *state, u8 onoff) +{ + int ret, i; + u8 tmp; + + dbg("%s: onoff=%d", __func__, onoff); + + /* enable reset */ + ret = af9013_wr_reg_bits(state, 0xd417, 4, 1, 1); + if (ret) + goto err; + + /* start reset mechanism */ + ret = af9013_wr_reg(state, 0xaeff, 1); + if (ret) + goto err; + + /* wait reset performs */ + for (i = 0; i < 150; i++) { + ret = af9013_rd_reg_bits(state, 0xd417, 1, 1, &tmp); + if (ret) + goto err; + + if (tmp) + break; /* reset done */ + + usleep_range(5000, 25000); + } + + if (!tmp) + return -ETIMEDOUT; + + if (onoff) { + /* clear reset */ + ret = af9013_wr_reg_bits(state, 0xd417, 1, 1, 0); + if (ret) + goto err; + + /* disable reset */ + ret = af9013_wr_reg_bits(state, 0xd417, 4, 1, 0); + + /* power on */ + ret = af9013_wr_reg_bits(state, 0xd73a, 3, 1, 0); + } else { + /* power off */ + ret = af9013_wr_reg_bits(state, 0xd73a, 3, 1, 1); + } + + return ret; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + +static int af9013_statistics_ber_unc_start(struct dvb_frontend *fe) +{ + struct af9013_state *state = fe->demodulator_priv; + int ret; + + dbg("%s", __func__); + + /* reset and start BER counter */ + ret = af9013_wr_reg_bits(state, 0xd391, 4, 1, 1); + if (ret) + goto err; + + return ret; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + +static int af9013_statistics_ber_unc_result(struct dvb_frontend *fe) +{ + struct af9013_state *state = fe->demodulator_priv; + int ret; + u8 buf[5]; + + dbg("%s", __func__); + + /* check if error bit count is ready */ + ret = af9013_rd_reg_bits(state, 0xd391, 4, 1, &buf[0]); + if (ret) + goto err; + + if (!buf[0]) { + dbg("%s: not ready", __func__); + return 0; + } + + ret = af9013_rd_regs(state, 0xd387, buf, 5); + if (ret) + goto err; + + state->ber = (buf[2] << 16) | (buf[1] << 8) | buf[0]; + state->ucblocks += (buf[4] << 8) | buf[3]; + + return ret; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + +static int af9013_statistics_snr_start(struct dvb_frontend *fe) +{ + struct af9013_state *state = fe->demodulator_priv; + int ret; + + dbg("%s", __func__); + + /* start SNR meas */ + ret = af9013_wr_reg_bits(state, 0xd2e1, 3, 1, 1); + if (ret) + goto err; + + return ret; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + +static int af9013_statistics_snr_result(struct dvb_frontend *fe) +{ + struct af9013_state *state = fe->demodulator_priv; + int ret, i, len; + u8 buf[3], tmp; + u32 snr_val; + const struct af9013_snr *uninitialized_var(snr_lut); + + dbg("%s", __func__); + + /* check if SNR ready */ + ret = af9013_rd_reg_bits(state, 0xd2e1, 3, 1, &tmp); + if (ret) + goto err; + + if (!tmp) { + dbg("%s: not ready", __func__); + return 0; + } + + /* read value */ + ret = af9013_rd_regs(state, 0xd2e3, buf, 3); + if (ret) + goto err; + + snr_val = (buf[2] << 16) | (buf[1] << 8) | buf[0]; + + /* read current modulation */ + ret = af9013_rd_reg(state, 0xd3c1, &tmp); + if (ret) + goto err; + + switch ((tmp >> 6) & 3) { + case 0: + len = ARRAY_SIZE(qpsk_snr_lut); + snr_lut = qpsk_snr_lut; + break; + case 1: + len = ARRAY_SIZE(qam16_snr_lut); + snr_lut = qam16_snr_lut; + break; + case 2: + len = ARRAY_SIZE(qam64_snr_lut); + snr_lut = qam64_snr_lut; + break; + default: + goto err; + break; + } + + for (i = 0; i < len; i++) { + tmp = snr_lut[i].snr; + + if (snr_val < snr_lut[i].val) + break; + } + state->snr = tmp * 10; /* dB/10 */ + + return ret; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + +static int af9013_statistics_signal_strength(struct dvb_frontend *fe) +{ + struct af9013_state *state = fe->demodulator_priv; + int ret = 0; + u8 buf[2], rf_gain, if_gain; + int signal_strength; + + dbg("%s", __func__); + + if (!state->signal_strength_en) + return 0; + + ret = af9013_rd_regs(state, 0xd07c, buf, 2); + if (ret) + goto err; + + rf_gain = buf[0]; + if_gain = buf[1]; + + signal_strength = (0xffff / \ + (9 * (state->rf_50 + state->if_50) - \ + 11 * (state->rf_80 + state->if_80))) * \ + (10 * (rf_gain + if_gain) - \ + 11 * (state->rf_80 + state->if_80)); + if (signal_strength < 0) + signal_strength = 0; + else if (signal_strength > 0xffff) + signal_strength = 0xffff; + + state->signal_strength = signal_strength; + + return ret; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + +static void af9013_statistics_work(struct work_struct *work) +{ + struct af9013_state *state = container_of(work, + struct af9013_state, statistics_work.work); + unsigned int next_msec; + + /* update only signal strength when demod is not locked */ + if (!(state->fe_status & FE_HAS_LOCK)) { + state->statistics_step = 0; + state->ber = 0; + state->snr = 0; + } + + switch (state->statistics_step) { + default: + state->statistics_step = 0; + case 0: + af9013_statistics_signal_strength(&state->fe); + state->statistics_step++; + next_msec = 300; + break; + case 1: + af9013_statistics_snr_start(&state->fe); + state->statistics_step++; + next_msec = 200; + break; + case 2: + af9013_statistics_ber_unc_start(&state->fe); + state->statistics_step++; + next_msec = 1000; + break; + case 3: + af9013_statistics_snr_result(&state->fe); + state->statistics_step++; + next_msec = 400; + break; + case 4: + af9013_statistics_ber_unc_result(&state->fe); + state->statistics_step++; + next_msec = 100; + break; + } + + schedule_delayed_work(&state->statistics_work, + msecs_to_jiffies(next_msec)); +} + +static int af9013_get_tune_settings(struct dvb_frontend *fe, + struct dvb_frontend_tune_settings *fesettings) +{ + fesettings->min_delay_ms = 800; + fesettings->step_size = 0; + fesettings->max_drift = 0; + + return 0; +} + +static int af9013_set_frontend(struct dvb_frontend *fe) +{ + struct af9013_state *state = fe->demodulator_priv; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + int ret, i, sampling_freq; + bool auto_mode, spec_inv; + u8 buf[6]; + u32 if_frequency, freq_cw; + + dbg("%s: frequency=%d bandwidth_hz=%d", __func__, + c->frequency, c->bandwidth_hz); + + /* program tuner */ + if (fe->ops.tuner_ops.set_params) + fe->ops.tuner_ops.set_params(fe); + + /* program CFOE coefficients */ + if (c->bandwidth_hz != state->bandwidth_hz) { + for (i = 0; i < ARRAY_SIZE(coeff_lut); i++) { + if (coeff_lut[i].clock == state->config.clock && + coeff_lut[i].bandwidth_hz == c->bandwidth_hz) { + break; + } + } + + ret = af9013_wr_regs(state, 0xae00, coeff_lut[i].val, + sizeof(coeff_lut[i].val)); + } + + /* program frequency control */ + if (c->bandwidth_hz != state->bandwidth_hz || state->first_tune) { + /* get used IF frequency */ + if (fe->ops.tuner_ops.get_if_frequency) + fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency); + else + if_frequency = state->config.if_frequency; + + sampling_freq = if_frequency; + + while (sampling_freq > (state->config.clock / 2)) + sampling_freq -= state->config.clock; + + if (sampling_freq < 0) { + sampling_freq *= -1; + spec_inv = state->config.spec_inv; + } else { + spec_inv = !state->config.spec_inv; + } + + freq_cw = af913_div(sampling_freq, state->config.clock, 23); + + if (spec_inv) + freq_cw = 0x800000 - freq_cw; + + buf[0] = (freq_cw >> 0) & 0xff; + buf[1] = (freq_cw >> 8) & 0xff; + buf[2] = (freq_cw >> 16) & 0x7f; + + freq_cw = 0x800000 - freq_cw; + + buf[3] = (freq_cw >> 0) & 0xff; + buf[4] = (freq_cw >> 8) & 0xff; + buf[5] = (freq_cw >> 16) & 0x7f; + + ret = af9013_wr_regs(state, 0xd140, buf, 3); + if (ret) + goto err; + + ret = af9013_wr_regs(state, 0x9be7, buf, 6); + if (ret) + goto err; + } + + /* clear TPS lock flag */ + ret = af9013_wr_reg_bits(state, 0xd330, 3, 1, 1); + if (ret) + goto err; + + /* clear MPEG2 lock flag */ + ret = af9013_wr_reg_bits(state, 0xd507, 6, 1, 0); + if (ret) + goto err; + + /* empty channel function */ + ret = af9013_wr_reg_bits(state, 0x9bfe, 0, 1, 0); + if (ret) + goto err; + + /* empty DVB-T channel function */ + ret = af9013_wr_reg_bits(state, 0x9bc2, 0, 1, 0); + if (ret) + goto err; + + /* transmission parameters */ + auto_mode = false; + memset(buf, 0, 3); + + switch (c->transmission_mode) { + case TRANSMISSION_MODE_AUTO: + auto_mode = 1; + break; + case TRANSMISSION_MODE_2K: + break; + case TRANSMISSION_MODE_8K: + buf[0] |= (1 << 0); + break; + default: + dbg("%s: invalid transmission_mode", __func__); + auto_mode = 1; + } + + switch (c->guard_interval) { + case GUARD_INTERVAL_AUTO: + auto_mode = 1; + break; + case GUARD_INTERVAL_1_32: + break; + case GUARD_INTERVAL_1_16: + buf[0] |= (1 << 2); + break; + case GUARD_INTERVAL_1_8: + buf[0] |= (2 << 2); + break; + case GUARD_INTERVAL_1_4: + buf[0] |= (3 << 2); + break; + default: + dbg("%s: invalid guard_interval", __func__); + auto_mode = 1; + } + + switch (c->hierarchy) { + case HIERARCHY_AUTO: + auto_mode = 1; + break; + case HIERARCHY_NONE: + break; + case HIERARCHY_1: + buf[0] |= (1 << 4); + break; + case HIERARCHY_2: + buf[0] |= (2 << 4); + break; + case HIERARCHY_4: + buf[0] |= (3 << 4); + break; + default: + dbg("%s: invalid hierarchy", __func__); + auto_mode = 1; + }; + + switch (c->modulation) { + case QAM_AUTO: + auto_mode = 1; + break; + case QPSK: + break; + case QAM_16: + buf[1] |= (1 << 6); + break; + case QAM_64: + buf[1] |= (2 << 6); + break; + default: + dbg("%s: invalid modulation", __func__); + auto_mode = 1; + } + + /* Use HP. How and which case we can switch to LP? */ + buf[1] |= (1 << 4); + + switch (c->code_rate_HP) { + case FEC_AUTO: + auto_mode = 1; + break; + case FEC_1_2: + break; + case FEC_2_3: + buf[2] |= (1 << 0); + break; + case FEC_3_4: + buf[2] |= (2 << 0); + break; + case FEC_5_6: + buf[2] |= (3 << 0); + break; + case FEC_7_8: + buf[2] |= (4 << 0); + break; + default: + dbg("%s: invalid code_rate_HP", __func__); + auto_mode = 1; + } + + switch (c->code_rate_LP) { + case FEC_AUTO: + auto_mode = 1; + break; + case FEC_1_2: + break; + case FEC_2_3: + buf[2] |= (1 << 3); + break; + case FEC_3_4: + buf[2] |= (2 << 3); + break; + case FEC_5_6: + buf[2] |= (3 << 3); + break; + case FEC_7_8: + buf[2] |= (4 << 3); + break; + case FEC_NONE: + break; + default: + dbg("%s: invalid code_rate_LP", __func__); + auto_mode = 1; + } + + switch (c->bandwidth_hz) { + case 6000000: + break; + case 7000000: + buf[1] |= (1 << 2); + break; + case 8000000: + buf[1] |= (2 << 2); + break; + default: + dbg("%s: invalid bandwidth_hz", __func__); + ret = -EINVAL; + goto err; + } + + ret = af9013_wr_regs(state, 0xd3c0, buf, 3); + if (ret) + goto err; + + if (auto_mode) { + /* clear easy mode flag */ + ret = af9013_wr_reg(state, 0xaefd, 0); + if (ret) + goto err; + + dbg("%s: auto params", __func__); + } else { + /* set easy mode flag */ + ret = af9013_wr_reg(state, 0xaefd, 1); + if (ret) + goto err; + + ret = af9013_wr_reg(state, 0xaefe, 0); + if (ret) + goto err; + + dbg("%s: manual params", __func__); + } + + /* tune */ + ret = af9013_wr_reg(state, 0xffff, 0); + if (ret) + goto err; + + state->bandwidth_hz = c->bandwidth_hz; + state->set_frontend_jiffies = jiffies; + state->first_tune = false; + + return ret; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + +static int af9013_get_frontend(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + struct af9013_state *state = fe->demodulator_priv; + int ret; + u8 buf[3]; + + dbg("%s", __func__); + + ret = af9013_rd_regs(state, 0xd3c0, buf, 3); + if (ret) + goto err; + + switch ((buf[1] >> 6) & 3) { + case 0: + c->modulation = QPSK; + break; + case 1: + c->modulation = QAM_16; + break; + case 2: + c->modulation = QAM_64; + break; + } + + switch ((buf[0] >> 0) & 3) { + case 0: + c->transmission_mode = TRANSMISSION_MODE_2K; + break; + case 1: + c->transmission_mode = TRANSMISSION_MODE_8K; + } + + switch ((buf[0] >> 2) & 3) { + case 0: + c->guard_interval = GUARD_INTERVAL_1_32; + break; + case 1: + c->guard_interval = GUARD_INTERVAL_1_16; + break; + case 2: + c->guard_interval = GUARD_INTERVAL_1_8; + break; + case 3: + c->guard_interval = GUARD_INTERVAL_1_4; + break; + } + + switch ((buf[0] >> 4) & 7) { + case 0: + c->hierarchy = HIERARCHY_NONE; + break; + case 1: + c->hierarchy = HIERARCHY_1; + break; + case 2: + c->hierarchy = HIERARCHY_2; + break; + case 3: + c->hierarchy = HIERARCHY_4; + break; + } + + switch ((buf[2] >> 0) & 7) { + case 0: + c->code_rate_HP = FEC_1_2; + break; + case 1: + c->code_rate_HP = FEC_2_3; + break; + case 2: + c->code_rate_HP = FEC_3_4; + break; + case 3: + c->code_rate_HP = FEC_5_6; + break; + case 4: + c->code_rate_HP = FEC_7_8; + break; + } + + switch ((buf[2] >> 3) & 7) { + case 0: + c->code_rate_LP = FEC_1_2; + break; + case 1: + c->code_rate_LP = FEC_2_3; + break; + case 2: + c->code_rate_LP = FEC_3_4; + break; + case 3: + c->code_rate_LP = FEC_5_6; + break; + case 4: + c->code_rate_LP = FEC_7_8; + break; + } + + switch ((buf[1] >> 2) & 3) { + case 0: + c->bandwidth_hz = 6000000; + break; + case 1: + c->bandwidth_hz = 7000000; + break; + case 2: + c->bandwidth_hz = 8000000; + break; + } + + return ret; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + +static int af9013_read_status(struct dvb_frontend *fe, fe_status_t *status) +{ + struct af9013_state *state = fe->demodulator_priv; + int ret; + u8 tmp; + + /* + * Return status from the cache if it is younger than 2000ms with the + * exception of last tune is done during 4000ms. + */ + if (time_is_after_jiffies( + state->read_status_jiffies + msecs_to_jiffies(2000)) && + time_is_before_jiffies( + state->set_frontend_jiffies + msecs_to_jiffies(4000)) + ) { + *status = state->fe_status; + return 0; + } else { + *status = 0; + } + + /* MPEG2 lock */ + ret = af9013_rd_reg_bits(state, 0xd507, 6, 1, &tmp); + if (ret) + goto err; + + if (tmp) + *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | + FE_HAS_SYNC | FE_HAS_LOCK; + + if (!*status) { + /* TPS lock */ + ret = af9013_rd_reg_bits(state, 0xd330, 3, 1, &tmp); + if (ret) + goto err; + + if (tmp) + *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | + FE_HAS_VITERBI; + } + + state->fe_status = *status; + state->read_status_jiffies = jiffies; + + return ret; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + +static int af9013_read_snr(struct dvb_frontend *fe, u16 *snr) +{ + struct af9013_state *state = fe->demodulator_priv; + *snr = state->snr; + return 0; +} + +static int af9013_read_signal_strength(struct dvb_frontend *fe, u16 *strength) +{ + struct af9013_state *state = fe->demodulator_priv; + *strength = state->signal_strength; + return 0; +} + +static int af9013_read_ber(struct dvb_frontend *fe, u32 *ber) +{ + struct af9013_state *state = fe->demodulator_priv; + *ber = state->ber; + return 0; +} + +static int af9013_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) +{ + struct af9013_state *state = fe->demodulator_priv; + *ucblocks = state->ucblocks; + return 0; +} + +static int af9013_init(struct dvb_frontend *fe) +{ + struct af9013_state *state = fe->demodulator_priv; + int ret, i, len; + u8 buf[3], tmp; + u32 adc_cw; + const struct af9013_reg_bit *init; + + dbg("%s", __func__); + + /* power on */ + ret = af9013_power_ctrl(state, 1); + if (ret) + goto err; + + /* enable ADC */ + ret = af9013_wr_reg(state, 0xd73a, 0xa4); + if (ret) + goto err; + + /* write API version to firmware */ + ret = af9013_wr_regs(state, 0x9bf2, state->config.api_version, 4); + if (ret) + goto err; + + /* program ADC control */ + switch (state->config.clock) { + case 28800000: /* 28.800 MHz */ + tmp = 0; + break; + case 20480000: /* 20.480 MHz */ + tmp = 1; + break; + case 28000000: /* 28.000 MHz */ + tmp = 2; + break; + case 25000000: /* 25.000 MHz */ + tmp = 3; + break; + default: + err("invalid clock"); + return -EINVAL; + } + + adc_cw = af913_div(state->config.clock, 1000000ul, 19); + buf[0] = (adc_cw >> 0) & 0xff; + buf[1] = (adc_cw >> 8) & 0xff; + buf[2] = (adc_cw >> 16) & 0xff; + + ret = af9013_wr_regs(state, 0xd180, buf, 3); + if (ret) + goto err; + + ret = af9013_wr_reg_bits(state, 0x9bd2, 0, 4, tmp); + if (ret) + goto err; + + /* set I2C master clock */ + ret = af9013_wr_reg(state, 0xd416, 0x14); + if (ret) + goto err; + + /* set 16 embx */ + ret = af9013_wr_reg_bits(state, 0xd700, 1, 1, 1); + if (ret) + goto err; + + /* set no trigger */ + ret = af9013_wr_reg_bits(state, 0xd700, 2, 1, 0); + if (ret) + goto err; + + /* set read-update bit for constellation */ + ret = af9013_wr_reg_bits(state, 0xd371, 1, 1, 1); + if (ret) + goto err; + + /* settings for mp2if */ + if (state->config.ts_mode == AF9013_TS_USB) { + /* AF9015 split PSB to 1.5k + 0.5k */ + ret = af9013_wr_reg_bits(state, 0xd50b, 2, 1, 1); + if (ret) + goto err; + } else { + /* AF9013 change the output bit to data7 */ + ret = af9013_wr_reg_bits(state, 0xd500, 3, 1, 1); + if (ret) + goto err; + + /* AF9013 set mpeg to full speed */ + ret = af9013_wr_reg_bits(state, 0xd502, 4, 1, 1); + if (ret) + goto err; + } + + ret = af9013_wr_reg_bits(state, 0xd520, 4, 1, 1); + if (ret) + goto err; + + /* load OFSM settings */ + dbg("%s: load ofsm settings", __func__); + len = ARRAY_SIZE(ofsm_init); + init = ofsm_init; + for (i = 0; i < len; i++) { + ret = af9013_wr_reg_bits(state, init[i].addr, init[i].pos, + init[i].len, init[i].val); + if (ret) + goto err; + } + + /* load tuner specific settings */ + dbg("%s: load tuner specific settings", __func__); + switch (state->config.tuner) { + case AF9013_TUNER_MXL5003D: + len = ARRAY_SIZE(tuner_init_mxl5003d); + init = tuner_init_mxl5003d; + break; + case AF9013_TUNER_MXL5005D: + case AF9013_TUNER_MXL5005R: + case AF9013_TUNER_MXL5007T: + len = ARRAY_SIZE(tuner_init_mxl5005); + init = tuner_init_mxl5005; + break; + case AF9013_TUNER_ENV77H11D5: + len = ARRAY_SIZE(tuner_init_env77h11d5); + init = tuner_init_env77h11d5; + break; + case AF9013_TUNER_MT2060: + len = ARRAY_SIZE(tuner_init_mt2060); + init = tuner_init_mt2060; + break; + case AF9013_TUNER_MC44S803: + len = ARRAY_SIZE(tuner_init_mc44s803); + init = tuner_init_mc44s803; + break; + case AF9013_TUNER_QT1010: + case AF9013_TUNER_QT1010A: + len = ARRAY_SIZE(tuner_init_qt1010); + init = tuner_init_qt1010; + break; + case AF9013_TUNER_MT2060_2: + len = ARRAY_SIZE(tuner_init_mt2060_2); + init = tuner_init_mt2060_2; + break; + case AF9013_TUNER_TDA18271: + case AF9013_TUNER_TDA18218: + len = ARRAY_SIZE(tuner_init_tda18271); + init = tuner_init_tda18271; + break; + case AF9013_TUNER_UNKNOWN: + default: + len = ARRAY_SIZE(tuner_init_unknown); + init = tuner_init_unknown; + break; + } + + for (i = 0; i < len; i++) { + ret = af9013_wr_reg_bits(state, init[i].addr, init[i].pos, + init[i].len, init[i].val); + if (ret) + goto err; + } + + /* TS mode */ + ret = af9013_wr_reg_bits(state, 0xd500, 1, 2, state->config.ts_mode); + if (ret) + goto err; + + /* enable lock led */ + ret = af9013_wr_reg_bits(state, 0xd730, 0, 1, 1); + if (ret) + goto err; + + /* check if we support signal strength */ + if (!state->signal_strength_en) { + ret = af9013_rd_reg_bits(state, 0x9bee, 0, 1, + &state->signal_strength_en); + if (ret) + goto err; + } + + /* read values needed for signal strength calculation */ + if (state->signal_strength_en && !state->rf_50) { + ret = af9013_rd_reg(state, 0x9bbd, &state->rf_50); + if (ret) + goto err; + + ret = af9013_rd_reg(state, 0x9bd0, &state->rf_80); + if (ret) + goto err; + + ret = af9013_rd_reg(state, 0x9be2, &state->if_50); + if (ret) + goto err; + + ret = af9013_rd_reg(state, 0x9be4, &state->if_80); + if (ret) + goto err; + } + + /* SNR */ + ret = af9013_wr_reg(state, 0xd2e2, 1); + if (ret) + goto err; + + /* BER / UCB */ + buf[0] = (10000 >> 0) & 0xff; + buf[1] = (10000 >> 8) & 0xff; + ret = af9013_wr_regs(state, 0xd385, buf, 2); + if (ret) + goto err; + + /* enable FEC monitor */ + ret = af9013_wr_reg_bits(state, 0xd392, 1, 1, 1); + if (ret) + goto err; + + state->first_tune = true; + schedule_delayed_work(&state->statistics_work, msecs_to_jiffies(400)); + + return ret; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + +static int af9013_sleep(struct dvb_frontend *fe) +{ + struct af9013_state *state = fe->demodulator_priv; + int ret; + + dbg("%s", __func__); + + /* stop statistics polling */ + cancel_delayed_work_sync(&state->statistics_work); + + /* disable lock led */ + ret = af9013_wr_reg_bits(state, 0xd730, 0, 1, 0); + if (ret) + goto err; + + /* power off */ + ret = af9013_power_ctrl(state, 0); + if (ret) + goto err; + + return ret; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + +static int af9013_i2c_gate_ctrl(struct dvb_frontend *fe, int enable) +{ + int ret; + struct af9013_state *state = fe->demodulator_priv; + + dbg("%s: enable=%d", __func__, enable); + + /* gate already open or close */ + if (state->i2c_gate_state == enable) + return 0; + + if (state->config.ts_mode == AF9013_TS_USB) + ret = af9013_wr_reg_bits(state, 0xd417, 3, 1, enable); + else + ret = af9013_wr_reg_bits(state, 0xd607, 2, 1, enable); + if (ret) + goto err; + + state->i2c_gate_state = enable; + + return ret; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + +static void af9013_release(struct dvb_frontend *fe) +{ + struct af9013_state *state = fe->demodulator_priv; + kfree(state); +} + +static struct dvb_frontend_ops af9013_ops; + +static int af9013_download_firmware(struct af9013_state *state) +{ + int i, len, remaining, ret; + const struct firmware *fw; + u16 checksum = 0; + u8 val; + u8 fw_params[4]; + u8 *fw_file = AF9013_DEFAULT_FIRMWARE; + + msleep(100); + /* check whether firmware is already running */ + ret = af9013_rd_reg(state, 0x98be, &val); + if (ret) + goto err; + else + dbg("%s: firmware status=%02x", __func__, val); + + if (val == 0x0c) /* fw is running, no need for download */ + goto exit; + + info("found a '%s' in cold state, will try to load a firmware", + af9013_ops.info.name); + + /* request the firmware, this will block and timeout */ + ret = request_firmware(&fw, fw_file, state->i2c->dev.parent); + if (ret) { + err("did not find the firmware file. (%s) " + "Please see linux/Documentation/dvb/ for more details" \ + " on firmware-problems. (%d)", + fw_file, ret); + goto err; + } + + info("downloading firmware from file '%s'", fw_file); + + /* calc checksum */ + for (i = 0; i < fw->size; i++) + checksum += fw->data[i]; + + fw_params[0] = checksum >> 8; + fw_params[1] = checksum & 0xff; + fw_params[2] = fw->size >> 8; + fw_params[3] = fw->size & 0xff; + + /* write fw checksum & size */ + ret = af9013_write_ofsm_regs(state, 0x50fc, + fw_params, sizeof(fw_params)); + if (ret) + goto err_release; + + #define FW_ADDR 0x5100 /* firmware start address */ + #define LEN_MAX 16 /* max packet size */ + for (remaining = fw->size; remaining > 0; remaining -= LEN_MAX) { + len = remaining; + if (len > LEN_MAX) + len = LEN_MAX; + + ret = af9013_write_ofsm_regs(state, + FW_ADDR + fw->size - remaining, + (u8 *) &fw->data[fw->size - remaining], len); + if (ret) { + err("firmware download failed:%d", ret); + goto err_release; + } + } + + /* request boot firmware */ + ret = af9013_wr_reg(state, 0xe205, 1); + if (ret) + goto err_release; + + for (i = 0; i < 15; i++) { + msleep(100); + + /* check firmware status */ + ret = af9013_rd_reg(state, 0x98be, &val); + if (ret) + goto err_release; + + dbg("%s: firmware status=%02x", __func__, val); + + if (val == 0x0c || val == 0x04) /* success or fail */ + break; + } + + if (val == 0x04) { + err("firmware did not run"); + ret = -ENODEV; + } else if (val != 0x0c) { + err("firmware boot timeout"); + ret = -ENODEV; + } + +err_release: + release_firmware(fw); +err: +exit: + if (!ret) + info("found a '%s' in warm state.", af9013_ops.info.name); + return ret; +} + +struct dvb_frontend *af9013_attach(const struct af9013_config *config, + struct i2c_adapter *i2c) +{ + int ret; + struct af9013_state *state = NULL; + u8 buf[4], i; + + /* allocate memory for the internal state */ + state = kzalloc(sizeof(struct af9013_state), GFP_KERNEL); + if (state == NULL) + goto err; + + /* setup the state */ + state->i2c = i2c; + memcpy(&state->config, config, sizeof(struct af9013_config)); + + /* download firmware */ + if (state->config.ts_mode != AF9013_TS_USB) { + ret = af9013_download_firmware(state); + if (ret) + goto err; + } + + /* firmware version */ + ret = af9013_rd_regs(state, 0x5103, buf, 4); + if (ret) + goto err; + + info("firmware version %d.%d.%d.%d", buf[0], buf[1], buf[2], buf[3]); + + /* set GPIOs */ + for (i = 0; i < sizeof(state->config.gpio); i++) { + ret = af9013_set_gpio(state, i, state->config.gpio[i]); + if (ret) + goto err; + } + + /* create dvb_frontend */ + memcpy(&state->fe.ops, &af9013_ops, + sizeof(struct dvb_frontend_ops)); + state->fe.demodulator_priv = state; + + INIT_DELAYED_WORK(&state->statistics_work, af9013_statistics_work); + + return &state->fe; +err: + kfree(state); + return NULL; +} +EXPORT_SYMBOL(af9013_attach); + +static struct dvb_frontend_ops af9013_ops = { + .delsys = { SYS_DVBT }, + .info = { + .name = "Afatech AF9013", + .frequency_min = 174000000, + .frequency_max = 862000000, + .frequency_stepsize = 250000, + .frequency_tolerance = 0, + .caps = FE_CAN_FEC_1_2 | + FE_CAN_FEC_2_3 | + FE_CAN_FEC_3_4 | + FE_CAN_FEC_5_6 | + FE_CAN_FEC_7_8 | + FE_CAN_FEC_AUTO | + FE_CAN_QPSK | + FE_CAN_QAM_16 | + FE_CAN_QAM_64 | + FE_CAN_QAM_AUTO | + FE_CAN_TRANSMISSION_MODE_AUTO | + FE_CAN_GUARD_INTERVAL_AUTO | + FE_CAN_HIERARCHY_AUTO | + FE_CAN_RECOVER | + FE_CAN_MUTE_TS + }, + + .release = af9013_release, + + .init = af9013_init, + .sleep = af9013_sleep, + + .get_tune_settings = af9013_get_tune_settings, + .set_frontend = af9013_set_frontend, + .get_frontend = af9013_get_frontend, + + .read_status = af9013_read_status, + .read_snr = af9013_read_snr, + .read_signal_strength = af9013_read_signal_strength, + .read_ber = af9013_read_ber, + .read_ucblocks = af9013_read_ucblocks, + + .i2c_gate_ctrl = af9013_i2c_gate_ctrl, +}; + +MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); +MODULE_DESCRIPTION("Afatech AF9013 DVB-T demodulator driver"); +MODULE_LICENSE("GPL"); |
