From 9a0bf528b4d66b605f02634236da085595c22101 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Mon, 13 Aug 2012 23:13:41 -0300 Subject: [media] move the dvb/frontends to drivers/media/dvb-frontends Raise the DVB frontends one level up, as the intention is to remove the drivers/media/dvb directory. Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb-frontends/zl10353.c | 684 ++++++++++++++++++++++++++++++++++ 1 file changed, 684 insertions(+) create mode 100644 drivers/media/dvb-frontends/zl10353.c (limited to 'drivers/media/dvb-frontends/zl10353.c') diff --git a/drivers/media/dvb-frontends/zl10353.c b/drivers/media/dvb-frontends/zl10353.c new file mode 100644 index 000000000000..82946cd517f5 --- /dev/null +++ b/drivers/media/dvb-frontends/zl10353.c @@ -0,0 +1,684 @@ +/* + * Driver for Zarlink DVB-T ZL10353 demodulator + * + * Copyright (C) 2006, 2007 Christopher Pascoe + * + * 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 +#include +#include +#include +#include +#include +#include + +#include "dvb_frontend.h" +#include "zl10353_priv.h" +#include "zl10353.h" + +struct zl10353_state { + struct i2c_adapter *i2c; + struct dvb_frontend frontend; + + struct zl10353_config config; + + u32 bandwidth; + u32 ucblocks; + u32 frequency; +}; + +static int debug; +#define dprintk(args...) \ + do { \ + if (debug) printk(KERN_DEBUG "zl10353: " args); \ + } while (0) + +static int debug_regs; + +static int zl10353_single_write(struct dvb_frontend *fe, u8 reg, u8 val) +{ + struct zl10353_state *state = fe->demodulator_priv; + u8 buf[2] = { reg, val }; + struct i2c_msg msg = { .addr = state->config.demod_address, .flags = 0, + .buf = buf, .len = 2 }; + int err = i2c_transfer(state->i2c, &msg, 1); + if (err != 1) { + printk("zl10353: write to reg %x failed (err = %d)!\n", reg, err); + return err; + } + return 0; +} + +static int zl10353_write(struct dvb_frontend *fe, const u8 ibuf[], int ilen) +{ + int err, i; + for (i = 0; i < ilen - 1; i++) + if ((err = zl10353_single_write(fe, ibuf[0] + i, ibuf[i + 1]))) + return err; + + return 0; +} + +static int zl10353_read_register(struct zl10353_state *state, u8 reg) +{ + int ret; + u8 b0[1] = { reg }; + u8 b1[1] = { 0 }; + struct i2c_msg msg[2] = { { .addr = state->config.demod_address, + .flags = 0, + .buf = b0, .len = 1 }, + { .addr = state->config.demod_address, + .flags = I2C_M_RD, + .buf = b1, .len = 1 } }; + + ret = i2c_transfer(state->i2c, msg, 2); + + if (ret != 2) { + printk("%s: readreg error (reg=%d, ret==%i)\n", + __func__, reg, ret); + return ret; + } + + return b1[0]; +} + +static void zl10353_dump_regs(struct dvb_frontend *fe) +{ + struct zl10353_state *state = fe->demodulator_priv; + int ret; + u8 reg; + + /* Dump all registers. */ + for (reg = 0; ; reg++) { + if (reg % 16 == 0) { + if (reg) + printk(KERN_CONT "\n"); + printk(KERN_DEBUG "%02x:", reg); + } + ret = zl10353_read_register(state, reg); + if (ret >= 0) + printk(KERN_CONT " %02x", (u8)ret); + else + printk(KERN_CONT " --"); + if (reg == 0xff) + break; + } + printk(KERN_CONT "\n"); +} + +static void zl10353_calc_nominal_rate(struct dvb_frontend *fe, + u32 bandwidth, + u16 *nominal_rate) +{ + struct zl10353_state *state = fe->demodulator_priv; + u32 adc_clock = 450560; /* 45.056 MHz */ + u64 value; + u8 bw = bandwidth / 1000000; + + if (state->config.adc_clock) + adc_clock = state->config.adc_clock; + + value = (u64)10 * (1 << 23) / 7 * 125; + value = (bw * value) + adc_clock / 2; + do_div(value, adc_clock); + *nominal_rate = value; + + dprintk("%s: bw %d, adc_clock %d => 0x%x\n", + __func__, bw, adc_clock, *nominal_rate); +} + +static void zl10353_calc_input_freq(struct dvb_frontend *fe, + u16 *input_freq) +{ + struct zl10353_state *state = fe->demodulator_priv; + u32 adc_clock = 450560; /* 45.056 MHz */ + int if2 = 361667; /* 36.1667 MHz */ + int ife; + u64 value; + + if (state->config.adc_clock) + adc_clock = state->config.adc_clock; + if (state->config.if2) + if2 = state->config.if2; + + if (adc_clock >= if2 * 2) + ife = if2; + else { + ife = adc_clock - (if2 % adc_clock); + if (ife > adc_clock / 2) + ife = adc_clock - ife; + } + value = (u64)65536 * ife + adc_clock / 2; + do_div(value, adc_clock); + *input_freq = -value; + + dprintk("%s: if2 %d, ife %d, adc_clock %d => %d / 0x%x\n", + __func__, if2, ife, adc_clock, -(int)value, *input_freq); +} + +static int zl10353_sleep(struct dvb_frontend *fe) +{ + static u8 zl10353_softdown[] = { 0x50, 0x0C, 0x44 }; + + zl10353_write(fe, zl10353_softdown, sizeof(zl10353_softdown)); + return 0; +} + +static int zl10353_set_parameters(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + struct zl10353_state *state = fe->demodulator_priv; + u16 nominal_rate, input_freq; + u8 pllbuf[6] = { 0x67 }, acq_ctl = 0; + u16 tps = 0; + + state->frequency = c->frequency; + + zl10353_single_write(fe, RESET, 0x80); + udelay(200); + zl10353_single_write(fe, 0xEA, 0x01); + udelay(200); + zl10353_single_write(fe, 0xEA, 0x00); + + zl10353_single_write(fe, AGC_TARGET, 0x28); + + if (c->transmission_mode != TRANSMISSION_MODE_AUTO) + acq_ctl |= (1 << 0); + if (c->guard_interval != GUARD_INTERVAL_AUTO) + acq_ctl |= (1 << 1); + zl10353_single_write(fe, ACQ_CTL, acq_ctl); + + switch (c->bandwidth_hz) { + case 6000000: + /* These are extrapolated from the 7 and 8MHz values */ + zl10353_single_write(fe, MCLK_RATIO, 0x97); + zl10353_single_write(fe, 0x64, 0x34); + zl10353_single_write(fe, 0xcc, 0xdd); + break; + case 7000000: + zl10353_single_write(fe, MCLK_RATIO, 0x86); + zl10353_single_write(fe, 0x64, 0x35); + zl10353_single_write(fe, 0xcc, 0x73); + break; + default: + c->bandwidth_hz = 8000000; + /* fall though */ + case 8000000: + zl10353_single_write(fe, MCLK_RATIO, 0x75); + zl10353_single_write(fe, 0x64, 0x36); + zl10353_single_write(fe, 0xcc, 0x73); + } + + zl10353_calc_nominal_rate(fe, c->bandwidth_hz, &nominal_rate); + zl10353_single_write(fe, TRL_NOMINAL_RATE_1, msb(nominal_rate)); + zl10353_single_write(fe, TRL_NOMINAL_RATE_0, lsb(nominal_rate)); + state->bandwidth = c->bandwidth_hz; + + zl10353_calc_input_freq(fe, &input_freq); + zl10353_single_write(fe, INPUT_FREQ_1, msb(input_freq)); + zl10353_single_write(fe, INPUT_FREQ_0, lsb(input_freq)); + + /* Hint at TPS settings */ + switch (c->code_rate_HP) { + case FEC_2_3: + tps |= (1 << 7); + break; + case FEC_3_4: + tps |= (2 << 7); + break; + case FEC_5_6: + tps |= (3 << 7); + break; + case FEC_7_8: + tps |= (4 << 7); + break; + case FEC_1_2: + case FEC_AUTO: + break; + default: + return -EINVAL; + } + + switch (c->code_rate_LP) { + case FEC_2_3: + tps |= (1 << 4); + break; + case FEC_3_4: + tps |= (2 << 4); + break; + case FEC_5_6: + tps |= (3 << 4); + break; + case FEC_7_8: + tps |= (4 << 4); + break; + case FEC_1_2: + case FEC_AUTO: + break; + case FEC_NONE: + if (c->hierarchy == HIERARCHY_AUTO || + c->hierarchy == HIERARCHY_NONE) + break; + default: + return -EINVAL; + } + + switch (c->modulation) { + case QPSK: + break; + case QAM_AUTO: + case QAM_16: + tps |= (1 << 13); + break; + case QAM_64: + tps |= (2 << 13); + break; + default: + return -EINVAL; + } + + switch (c->transmission_mode) { + case TRANSMISSION_MODE_2K: + case TRANSMISSION_MODE_AUTO: + break; + case TRANSMISSION_MODE_8K: + tps |= (1 << 0); + break; + default: + return -EINVAL; + } + + switch (c->guard_interval) { + case GUARD_INTERVAL_1_32: + case GUARD_INTERVAL_AUTO: + break; + case GUARD_INTERVAL_1_16: + tps |= (1 << 2); + break; + case GUARD_INTERVAL_1_8: + tps |= (2 << 2); + break; + case GUARD_INTERVAL_1_4: + tps |= (3 << 2); + break; + default: + return -EINVAL; + } + + switch (c->hierarchy) { + case HIERARCHY_AUTO: + case HIERARCHY_NONE: + break; + case HIERARCHY_1: + tps |= (1 << 10); + break; + case HIERARCHY_2: + tps |= (2 << 10); + break; + case HIERARCHY_4: + tps |= (3 << 10); + break; + default: + return -EINVAL; + } + + zl10353_single_write(fe, TPS_GIVEN_1, msb(tps)); + zl10353_single_write(fe, TPS_GIVEN_0, lsb(tps)); + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + + /* + * If there is no tuner attached to the secondary I2C bus, we call + * set_params to program a potential tuner attached somewhere else. + * Otherwise, we update the PLL registers via calc_regs. + */ + if (state->config.no_tuner) { + if (fe->ops.tuner_ops.set_params) { + fe->ops.tuner_ops.set_params(fe); + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + } + } else if (fe->ops.tuner_ops.calc_regs) { + fe->ops.tuner_ops.calc_regs(fe, pllbuf + 1, 5); + pllbuf[1] <<= 1; + zl10353_write(fe, pllbuf, sizeof(pllbuf)); + } + + zl10353_single_write(fe, 0x5F, 0x13); + + /* If no attached tuner or invalid PLL registers, just start the FSM. */ + if (state->config.no_tuner || fe->ops.tuner_ops.calc_regs == NULL) + zl10353_single_write(fe, FSM_GO, 0x01); + else + zl10353_single_write(fe, TUNER_GO, 0x01); + + return 0; +} + +static int zl10353_get_parameters(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + struct zl10353_state *state = fe->demodulator_priv; + int s6, s9; + u16 tps; + static const u8 tps_fec_to_api[8] = { + FEC_1_2, + FEC_2_3, + FEC_3_4, + FEC_5_6, + FEC_7_8, + FEC_AUTO, + FEC_AUTO, + FEC_AUTO + }; + + s6 = zl10353_read_register(state, STATUS_6); + s9 = zl10353_read_register(state, STATUS_9); + if (s6 < 0 || s9 < 0) + return -EREMOTEIO; + if ((s6 & (1 << 5)) == 0 || (s9 & (1 << 4)) == 0) + return -EINVAL; /* no FE or TPS lock */ + + tps = zl10353_read_register(state, TPS_RECEIVED_1) << 8 | + zl10353_read_register(state, TPS_RECEIVED_0); + + c->code_rate_HP = tps_fec_to_api[(tps >> 7) & 7]; + c->code_rate_LP = tps_fec_to_api[(tps >> 4) & 7]; + + switch ((tps >> 13) & 3) { + case 0: + c->modulation = QPSK; + break; + case 1: + c->modulation = QAM_16; + break; + case 2: + c->modulation = QAM_64; + break; + default: + c->modulation = QAM_AUTO; + break; + } + + c->transmission_mode = (tps & 0x01) ? TRANSMISSION_MODE_8K : + TRANSMISSION_MODE_2K; + + switch ((tps >> 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; + default: + c->guard_interval = GUARD_INTERVAL_AUTO; + break; + } + + switch ((tps >> 10) & 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; + default: + c->hierarchy = HIERARCHY_AUTO; + break; + } + + c->frequency = state->frequency; + c->bandwidth_hz = state->bandwidth; + c->inversion = INVERSION_AUTO; + + return 0; +} + +static int zl10353_read_status(struct dvb_frontend *fe, fe_status_t *status) +{ + struct zl10353_state *state = fe->demodulator_priv; + int s6, s7, s8; + + if ((s6 = zl10353_read_register(state, STATUS_6)) < 0) + return -EREMOTEIO; + if ((s7 = zl10353_read_register(state, STATUS_7)) < 0) + return -EREMOTEIO; + if ((s8 = zl10353_read_register(state, STATUS_8)) < 0) + return -EREMOTEIO; + + *status = 0; + if (s6 & (1 << 2)) + *status |= FE_HAS_CARRIER; + if (s6 & (1 << 1)) + *status |= FE_HAS_VITERBI; + if (s6 & (1 << 5)) + *status |= FE_HAS_LOCK; + if (s7 & (1 << 4)) + *status |= FE_HAS_SYNC; + if (s8 & (1 << 6)) + *status |= FE_HAS_SIGNAL; + + if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) != + (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) + *status &= ~FE_HAS_LOCK; + + return 0; +} + +static int zl10353_read_ber(struct dvb_frontend *fe, u32 *ber) +{ + struct zl10353_state *state = fe->demodulator_priv; + + *ber = zl10353_read_register(state, RS_ERR_CNT_2) << 16 | + zl10353_read_register(state, RS_ERR_CNT_1) << 8 | + zl10353_read_register(state, RS_ERR_CNT_0); + + return 0; +} + +static int zl10353_read_signal_strength(struct dvb_frontend *fe, u16 *strength) +{ + struct zl10353_state *state = fe->demodulator_priv; + + u16 signal = zl10353_read_register(state, AGC_GAIN_1) << 10 | + zl10353_read_register(state, AGC_GAIN_0) << 2 | 3; + + *strength = ~signal; + + return 0; +} + +static int zl10353_read_snr(struct dvb_frontend *fe, u16 *snr) +{ + struct zl10353_state *state = fe->demodulator_priv; + u8 _snr; + + if (debug_regs) + zl10353_dump_regs(fe); + + _snr = zl10353_read_register(state, SNR); + *snr = 10 * _snr / 8; + + return 0; +} + +static int zl10353_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) +{ + struct zl10353_state *state = fe->demodulator_priv; + u32 ubl = 0; + + ubl = zl10353_read_register(state, RS_UBC_1) << 8 | + zl10353_read_register(state, RS_UBC_0); + + state->ucblocks += ubl; + *ucblocks = state->ucblocks; + + return 0; +} + +static int zl10353_get_tune_settings(struct dvb_frontend *fe, + struct dvb_frontend_tune_settings + *fe_tune_settings) +{ + fe_tune_settings->min_delay_ms = 1000; + fe_tune_settings->step_size = 0; + fe_tune_settings->max_drift = 0; + + return 0; +} + +static int zl10353_init(struct dvb_frontend *fe) +{ + struct zl10353_state *state = fe->demodulator_priv; + u8 zl10353_reset_attach[6] = { 0x50, 0x03, 0x64, 0x46, 0x15, 0x0F }; + + if (debug_regs) + zl10353_dump_regs(fe); + if (state->config.parallel_ts) + zl10353_reset_attach[2] &= ~0x20; + if (state->config.clock_ctl_1) + zl10353_reset_attach[3] = state->config.clock_ctl_1; + if (state->config.pll_0) + zl10353_reset_attach[4] = state->config.pll_0; + + /* Do a "hard" reset if not already done */ + if (zl10353_read_register(state, 0x50) != zl10353_reset_attach[1] || + zl10353_read_register(state, 0x51) != zl10353_reset_attach[2]) { + zl10353_write(fe, zl10353_reset_attach, + sizeof(zl10353_reset_attach)); + if (debug_regs) + zl10353_dump_regs(fe); + } + + return 0; +} + +static int zl10353_i2c_gate_ctrl(struct dvb_frontend* fe, int enable) +{ + struct zl10353_state *state = fe->demodulator_priv; + u8 val = 0x0a; + + if (state->config.disable_i2c_gate_ctrl) { + /* No tuner attached to the internal I2C bus */ + /* If set enable I2C bridge, the main I2C bus stopped hardly */ + return 0; + } + + if (enable) + val |= 0x10; + + return zl10353_single_write(fe, 0x62, val); +} + +static void zl10353_release(struct dvb_frontend *fe) +{ + struct zl10353_state *state = fe->demodulator_priv; + kfree(state); +} + +static struct dvb_frontend_ops zl10353_ops; + +struct dvb_frontend *zl10353_attach(const struct zl10353_config *config, + struct i2c_adapter *i2c) +{ + struct zl10353_state *state = NULL; + int id; + + /* allocate memory for the internal state */ + state = kzalloc(sizeof(struct zl10353_state), GFP_KERNEL); + if (state == NULL) + goto error; + + /* setup the state */ + state->i2c = i2c; + memcpy(&state->config, config, sizeof(struct zl10353_config)); + + /* check if the demod is there */ + id = zl10353_read_register(state, CHIP_ID); + if ((id != ID_ZL10353) && (id != ID_CE6230) && (id != ID_CE6231)) + goto error; + + /* create dvb_frontend */ + memcpy(&state->frontend.ops, &zl10353_ops, sizeof(struct dvb_frontend_ops)); + state->frontend.demodulator_priv = state; + + return &state->frontend; +error: + kfree(state); + return NULL; +} + +static struct dvb_frontend_ops zl10353_ops = { + .delsys = { SYS_DVBT }, + .info = { + .name = "Zarlink ZL10353 DVB-T", + .frequency_min = 174000000, + .frequency_max = 862000000, + .frequency_stepsize = 166667, + .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 = zl10353_release, + + .init = zl10353_init, + .sleep = zl10353_sleep, + .i2c_gate_ctrl = zl10353_i2c_gate_ctrl, + .write = zl10353_write, + + .set_frontend = zl10353_set_parameters, + .get_frontend = zl10353_get_parameters, + .get_tune_settings = zl10353_get_tune_settings, + + .read_status = zl10353_read_status, + .read_ber = zl10353_read_ber, + .read_signal_strength = zl10353_read_signal_strength, + .read_snr = zl10353_read_snr, + .read_ucblocks = zl10353_read_ucblocks, +}; + +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); + +module_param(debug_regs, int, 0644); +MODULE_PARM_DESC(debug_regs, "Turn on/off frontend register dumps (default:off)."); + +MODULE_DESCRIPTION("Zarlink ZL10353 DVB-T demodulator driver"); +MODULE_AUTHOR("Chris Pascoe"); +MODULE_LICENSE("GPL"); + +EXPORT_SYMBOL(zl10353_attach); -- cgit v1.2.3