/* * Driver for Zarlink DVB-T ZL10353 demodulator * * Copyright (C) 2006 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; }; static int debug; #define dprintk(args...) \ do { \ if (debug) printk(KERN_DEBUG "zl10353: " args); \ } while (0) static int debug_regs = 0; 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, 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", __FUNCTION__, reg, ret); return ret; } return b1[0]; } static void zl10353_dump_regs(struct dvb_frontend *fe) { struct zl10353_state *state = fe->demodulator_priv; char buf[52], buf2[4]; int ret; u8 reg; /* Dump all registers. */ for (reg = 0; ; reg++) { if (reg % 16 == 0) { if (reg) printk(KERN_DEBUG "%s\n", buf); sprintf(buf, "%02x: ", reg); } ret = zl10353_read_register(state, reg); if (ret >= 0) sprintf(buf2, "%02x ", (u8)ret); else strcpy(buf2, "-- "); strcat(buf, buf2); if (reg == 0xff) break; } printk(KERN_DEBUG "%s\n", buf); } static void zl10353_calc_nominal_rate(struct dvb_frontend *fe, enum fe_bandwidth bandwidth, u16 *nominal_rate) { u32 adc_clock = 22528; /* 20.480 MHz on the board(!?) */ u8 bw; struct zl10353_state *state = fe->demodulator_priv; if (state->config.adc_clock) adc_clock = state->config.adc_clock; switch (bandwidth) { case BANDWIDTH_6_MHZ: bw = 6; break; case BANDWIDTH_7_MHZ: bw = 7; break; case BANDWIDTH_8_MHZ: default: bw = 8; break; } *nominal_rate = (64 * bw * (1<<16) / (7 * 8) * 4000 / adc_clock + 2) / 4; dprintk("%s: bw %d, adc_clock %d => 0x%x\n", __FUNCTION__, bw, adc_clock, *nominal_rate); } 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 dvb_frontend_parameters *param) { struct zl10353_state *state = fe->demodulator_priv; u16 nominal_rate; u8 pllbuf[6] = { 0x67 }; /* These settings set "auto-everything" and start the FSM. */ zl10353_single_write(fe, 0x55, 0x80); udelay(200); zl10353_single_write(fe, 0xEA, 0x01); udelay(200); zl10353_single_write(fe, 0xEA, 0x00); zl10353_single_write(fe, 0x56, 0x28); zl10353_single_write(fe, 0x89, 0x20); zl10353_single_write(fe, 0x5E, 0x00); zl10353_calc_nominal_rate(fe, param->u.ofdm.bandwidth, &nominal_rate); zl10353_single_write(fe, TRL_NOMINAL_RATE_1, msb(nominal_rate)); zl10353_single_write(fe, TRL_NOMINAL_RATE_0, lsb(nominal_rate)); zl10353_single_write(fe, 0x6C, 0xCD); zl10353_single_write(fe, 0x6D, 0x7E); if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); // if there is no attached secondary tuner, we call set_params to program // a potential tuner attached somewhere else if (state->config.no_tuner) { if (fe->ops.tuner_ops.set_params) { fe->ops.tuner_ops.set_params(fe, param); if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); } } // if pllbuf is defined, retrieve the settings if (fe->ops.tuner_ops.calc_regs) { fe->ops.tuner_ops.calc_regs(fe, param, pllbuf+1, 5); pllbuf[1] <<= 1; } else { // fake pllbuf settings pllbuf[1] = 0x61 << 1; pllbuf[2] = 0; pllbuf[3] = 0; pllbuf[3] = 0; pllbuf[4] = 0; } // there is no call to _just_ start decoding, so we send the pllbuf anyway // even if there isn't a PLL attached to the secondary bus zl10353_write(fe, pllbuf, sizeof(pllbuf)); zl10353_single_write(fe, 0x5F, 0x13); zl10353_single_write(fe, 0x70, 0x01); udelay(250); zl10353_single_write(fe, 0xE4, 0x00); zl10353_single_write(fe, 0xE5, 0x2A); zl10353_single_write(fe, 0xE9, 0x02); zl10353_single_write(fe, 0xE7, 0x40); zl10353_single_write(fe, 0xE8, 0x10); 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, 0x11) << 16 | zl10353_read_register(state, 0x12) << 8 | zl10353_read_register(state, 0x13); 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, 0x0a) << 10 | zl10353_read_register(state, 0x0b) << 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 = (_snr << 8) | _snr; return 0; } static int zl10353_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) { struct zl10353_state *state = fe->demodulator_priv; *ucblocks = zl10353_read_register(state, 0x14) << 8 | zl10353_read_register(state, 0x15); 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 }; int rc = 0; if (debug_regs) zl10353_dump_regs(fe); if (state->config.parallel_ts) zl10353_reset_attach[2] &= ~0x20; /* 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]) { rc = 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) { u8 val = 0x0a; 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; /* 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 */ if (zl10353_read_register(state, CHIP_ID) != ID_ZL10353) 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 = { .info = { .name = "Zarlink ZL10353 DVB-T", .type = FE_OFDM, .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_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);