diff options
Diffstat (limited to 'drivers/media/dvb/dvb-usb/mxl111sf-tuner.c')
| -rw-r--r-- | drivers/media/dvb/dvb-usb/mxl111sf-tuner.c | 476 |
1 files changed, 476 insertions, 0 deletions
diff --git a/drivers/media/dvb/dvb-usb/mxl111sf-tuner.c b/drivers/media/dvb/dvb-usb/mxl111sf-tuner.c new file mode 100644 index 00000000000..a6341058c4e --- /dev/null +++ b/drivers/media/dvb/dvb-usb/mxl111sf-tuner.c @@ -0,0 +1,476 @@ +/* + * mxl111sf-tuner.c - driver for the MaxLinear MXL111SF CMOS tuner + * + * Copyright (C) 2010 Michael Krufky <mkrufky@kernellabs.com> + * + * 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 "mxl111sf-tuner.h" +#include "mxl111sf-phy.h" +#include "mxl111sf-reg.h" + +/* debug */ +static int mxl111sf_tuner_debug; +module_param_named(debug, mxl111sf_tuner_debug, int, 0644); +MODULE_PARM_DESC(debug, "set debugging level (1=info (or-able))."); + +#define mxl_dbg(fmt, arg...) \ + if (mxl111sf_tuner_debug) \ + mxl_printk(KERN_DEBUG, fmt, ##arg) + +/* ------------------------------------------------------------------------ */ + +struct mxl111sf_tuner_state { + struct mxl111sf_state *mxl_state; + + struct mxl111sf_tuner_config *cfg; + + u32 frequency; + u32 bandwidth; +}; + +static int mxl111sf_tuner_read_reg(struct mxl111sf_tuner_state *state, + u8 addr, u8 *data) +{ + return (state->cfg->read_reg) ? + state->cfg->read_reg(state->mxl_state, addr, data) : + -EINVAL; +} + +static int mxl111sf_tuner_write_reg(struct mxl111sf_tuner_state *state, + u8 addr, u8 data) +{ + return (state->cfg->write_reg) ? + state->cfg->write_reg(state->mxl_state, addr, data) : + -EINVAL; +} + +static int mxl111sf_tuner_program_regs(struct mxl111sf_tuner_state *state, + struct mxl111sf_reg_ctrl_info *ctrl_reg_info) +{ + return (state->cfg->program_regs) ? + state->cfg->program_regs(state->mxl_state, ctrl_reg_info) : + -EINVAL; +} + +static int mxl1x1sf_tuner_top_master_ctrl(struct mxl111sf_tuner_state *state, + int onoff) +{ + return (state->cfg->top_master_ctrl) ? + state->cfg->top_master_ctrl(state->mxl_state, onoff) : + -EINVAL; +} + +/* ------------------------------------------------------------------------ */ + +static struct mxl111sf_reg_ctrl_info mxl_phy_tune_rf[] = { + {0x1d, 0x7f, 0x00}, /* channel bandwidth section 1/2/3, + DIG_MODEINDEX, _A, _CSF, */ + {0x1e, 0xff, 0x00}, /* channel frequency (lo and fractional) */ + {0x1f, 0xff, 0x00}, /* channel frequency (hi for integer portion) */ + {0, 0, 0} +}; + +/* ------------------------------------------------------------------------ */ + +static struct mxl111sf_reg_ctrl_info *mxl111sf_calc_phy_tune_regs(u32 freq, + u8 bw) +{ + u8 filt_bw; + + /* set channel bandwidth */ + switch (bw) { + case 0: /* ATSC */ + filt_bw = 25; + break; + case 1: /* QAM */ + filt_bw = 69; + break; + case 6: + filt_bw = 21; + break; + case 7: + filt_bw = 42; + break; + case 8: + filt_bw = 63; + break; + default: + err("%s: invalid bandwidth setting!", __func__); + return NULL; + } + + /* calculate RF channel */ + freq /= 1000000; + + freq *= 64; +#if 0 + /* do round */ + freq += 0.5; +#endif + /* set bandwidth */ + mxl_phy_tune_rf[0].data = filt_bw; + + /* set RF */ + mxl_phy_tune_rf[1].data = (freq & 0xff); + mxl_phy_tune_rf[2].data = (freq >> 8) & 0xff; + + /* start tune */ + return mxl_phy_tune_rf; +} + +static int mxl1x1sf_tuner_set_if_output_freq(struct mxl111sf_tuner_state *state) +{ + int ret; + u8 ctrl; +#if 0 + u16 iffcw; + u32 if_freq; +#endif + mxl_dbg("(IF polarity = %d, IF freq = 0x%02x)", + state->cfg->invert_spectrum, state->cfg->if_freq); + + /* set IF polarity */ + ctrl = state->cfg->invert_spectrum; + + ctrl |= state->cfg->if_freq; + + ret = mxl111sf_tuner_write_reg(state, V6_TUNER_IF_SEL_REG, ctrl); + if (mxl_fail(ret)) + goto fail; + +#if 0 + if_freq /= 1000000; + + /* do round */ + if_freq += 0.5; + + if (MXL_IF_LO == state->cfg->if_freq) { + ctrl = 0x08; + iffcw = (u16)(if_freq / (108 * 4096)); + } else if (MXL_IF_HI == state->cfg->if_freq) { + ctrl = 0x08; + iffcw = (u16)(if_freq / (216 * 4096)); + } else { + ctrl = 0; + iffcw = 0; + } + + ctrl |= (iffcw >> 8); +#endif + ret = mxl111sf_tuner_read_reg(state, V6_TUNER_IF_FCW_BYP_REG, &ctrl); + if (mxl_fail(ret)) + goto fail; + + ctrl &= 0xf0; + ctrl |= 0x90; + + ret = mxl111sf_tuner_write_reg(state, V6_TUNER_IF_FCW_BYP_REG, ctrl); + if (mxl_fail(ret)) + goto fail; + +#if 0 + ctrl = iffcw & 0x00ff; +#endif + ret = mxl111sf_tuner_write_reg(state, V6_TUNER_IF_FCW_REG, ctrl); + mxl_fail(ret); +fail: + return ret; +} + +static int mxl1x1sf_tune_rf(struct dvb_frontend *fe, u32 freq, u8 bw) +{ + struct mxl111sf_tuner_state *state = fe->tuner_priv; + static struct mxl111sf_reg_ctrl_info *reg_ctrl_array; + int ret; + u8 mxl_mode; + + mxl_dbg("(freq = %d, bw = 0x%x)", freq, bw); + + /* stop tune */ + ret = mxl111sf_tuner_write_reg(state, START_TUNE_REG, 0); + if (mxl_fail(ret)) + goto fail; + + /* check device mode */ + ret = mxl111sf_tuner_read_reg(state, MXL_MODE_REG, &mxl_mode); + if (mxl_fail(ret)) + goto fail; + + /* Fill out registers for channel tune */ + reg_ctrl_array = mxl111sf_calc_phy_tune_regs(freq, bw); + if (!reg_ctrl_array) + return -EINVAL; + + ret = mxl111sf_tuner_program_regs(state, reg_ctrl_array); + if (mxl_fail(ret)) + goto fail; + + if ((mxl_mode & MXL_DEV_MODE_MASK) == MXL_TUNER_MODE) { + /* IF tuner mode only */ + mxl1x1sf_tuner_top_master_ctrl(state, 0); + mxl1x1sf_tuner_top_master_ctrl(state, 1); + mxl1x1sf_tuner_set_if_output_freq(state); + } + + ret = mxl111sf_tuner_write_reg(state, START_TUNE_REG, 1); + if (mxl_fail(ret)) + goto fail; + + if (state->cfg->ant_hunt) + state->cfg->ant_hunt(fe); +fail: + return ret; +} + +static int mxl1x1sf_tuner_get_lock_status(struct mxl111sf_tuner_state *state, + int *rf_synth_lock, + int *ref_synth_lock) +{ + int ret; + u8 data; + + *rf_synth_lock = 0; + *ref_synth_lock = 0; + + ret = mxl111sf_tuner_read_reg(state, V6_RF_LOCK_STATUS_REG, &data); + if (mxl_fail(ret)) + goto fail; + + *ref_synth_lock = ((data & 0x03) == 0x03) ? 1 : 0; + *rf_synth_lock = ((data & 0x0c) == 0x0c) ? 1 : 0; +fail: + return ret; +} + +#if 0 +static int mxl1x1sf_tuner_loop_thru_ctrl(struct mxl111sf_tuner_state *state, + int onoff) +{ + return mxl111sf_tuner_write_reg(state, V6_TUNER_LOOP_THRU_CTRL_REG, + onoff ? 1 : 0); +} +#endif + +/* ------------------------------------------------------------------------ */ + +static int mxl111sf_tuner_set_params(struct dvb_frontend *fe, + struct dvb_frontend_parameters *params) +{ + struct mxl111sf_tuner_state *state = fe->tuner_priv; + int ret; + u8 bw; + + mxl_dbg("()"); + + if (fe->ops.info.type == FE_ATSC) { + switch (params->u.vsb.modulation) { + case VSB_8: + case VSB_16: + bw = 0; /* ATSC */ + break; + case QAM_64: + case QAM_256: + bw = 1; /* US CABLE */ + break; + default: + err("%s: modulation not set!", __func__); + return -EINVAL; + } + } else if (fe->ops.info.type == FE_OFDM) { + switch (params->u.ofdm.bandwidth) { + case BANDWIDTH_6_MHZ: + bw = 6; + break; + case BANDWIDTH_7_MHZ: + bw = 7; + break; + case BANDWIDTH_8_MHZ: + bw = 8; + break; + default: + err("%s: bandwidth not set!", __func__); + return -EINVAL; + } + } else { + err("%s: modulation type not supported!", __func__); + return -EINVAL; + } + ret = mxl1x1sf_tune_rf(fe, params->frequency, bw); + if (mxl_fail(ret)) + goto fail; + + state->frequency = params->frequency; + state->bandwidth = (fe->ops.info.type == FE_OFDM) ? + params->u.ofdm.bandwidth : 0; +fail: + return ret; +} + +/* ------------------------------------------------------------------------ */ + +#if 0 +static int mxl111sf_tuner_init(struct dvb_frontend *fe) +{ + struct mxl111sf_tuner_state *state = fe->tuner_priv; + int ret; + + /* wake from standby handled by usb driver */ + + return ret; +} + +static int mxl111sf_tuner_sleep(struct dvb_frontend *fe) +{ + struct mxl111sf_tuner_state *state = fe->tuner_priv; + int ret; + + /* enter standby mode handled by usb driver */ + + return ret; +} +#endif + +/* ------------------------------------------------------------------------ */ + +static int mxl111sf_tuner_get_status(struct dvb_frontend *fe, u32 *status) +{ + struct mxl111sf_tuner_state *state = fe->tuner_priv; + int rf_locked, ref_locked, ret; + + *status = 0; + + ret = mxl1x1sf_tuner_get_lock_status(state, &rf_locked, &ref_locked); + if (mxl_fail(ret)) + goto fail; + mxl_info("%s%s", rf_locked ? "rf locked " : "", + ref_locked ? "ref locked" : ""); + + if ((rf_locked) || (ref_locked)) + *status |= TUNER_STATUS_LOCKED; +fail: + return ret; +} + +static int mxl111sf_get_rf_strength(struct dvb_frontend *fe, u16 *strength) +{ + struct mxl111sf_tuner_state *state = fe->tuner_priv; + u8 val1, val2; + int ret; + + *strength = 0; + + ret = mxl111sf_tuner_write_reg(state, 0x00, 0x02); + if (mxl_fail(ret)) + goto fail; + ret = mxl111sf_tuner_read_reg(state, V6_DIG_RF_PWR_LSB_REG, &val1); + if (mxl_fail(ret)) + goto fail; + ret = mxl111sf_tuner_read_reg(state, V6_DIG_RF_PWR_MSB_REG, &val2); + if (mxl_fail(ret)) + goto fail; + + *strength = val1 | ((val2 & 0x07) << 8); +fail: + ret = mxl111sf_tuner_write_reg(state, 0x00, 0x00); + mxl_fail(ret); + + return ret; +} + +/* ------------------------------------------------------------------------ */ + +static int mxl111sf_tuner_get_frequency(struct dvb_frontend *fe, u32 *frequency) +{ + struct mxl111sf_tuner_state *state = fe->tuner_priv; + *frequency = state->frequency; + return 0; +} + +static int mxl111sf_tuner_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth) +{ + struct mxl111sf_tuner_state *state = fe->tuner_priv; + *bandwidth = state->bandwidth; + return 0; +} + +static int mxl111sf_tuner_release(struct dvb_frontend *fe) +{ + struct mxl111sf_tuner_state *state = fe->tuner_priv; + mxl_dbg("()"); + kfree(state); + fe->tuner_priv = NULL; + return 0; +} + +/* ------------------------------------------------------------------------- */ + +static struct dvb_tuner_ops mxl111sf_tuner_tuner_ops = { + .info = { + .name = "MaxLinear MxL111SF", +#if 0 + .frequency_min = , + .frequency_max = , + .frequency_step = , +#endif + }, +#if 0 + .init = mxl111sf_tuner_init, + .sleep = mxl111sf_tuner_sleep, +#endif + .set_params = mxl111sf_tuner_set_params, + .get_status = mxl111sf_tuner_get_status, + .get_rf_strength = mxl111sf_get_rf_strength, + .get_frequency = mxl111sf_tuner_get_frequency, + .get_bandwidth = mxl111sf_tuner_get_bandwidth, + .release = mxl111sf_tuner_release, +}; + +struct dvb_frontend *mxl111sf_tuner_attach(struct dvb_frontend *fe, + struct mxl111sf_state *mxl_state, + struct mxl111sf_tuner_config *cfg) +{ + struct mxl111sf_tuner_state *state = NULL; + + mxl_dbg("()"); + + state = kzalloc(sizeof(struct mxl111sf_tuner_state), GFP_KERNEL); + if (state == NULL) + return NULL; + + state->mxl_state = mxl_state; + state->cfg = cfg; + + memcpy(&fe->ops.tuner_ops, &mxl111sf_tuner_tuner_ops, + sizeof(struct dvb_tuner_ops)); + + fe->tuner_priv = state; + return fe; +} +EXPORT_SYMBOL_GPL(mxl111sf_tuner_attach); + +MODULE_DESCRIPTION("MaxLinear MxL111SF CMOS tuner driver"); +MODULE_AUTHOR("Michael Krufky <mkrufky@kernellabs.com>"); +MODULE_LICENSE("GPL"); +MODULE_VERSION("0.1"); + +/* + * Overrides for Emacs so that we follow Linus's tabbing style. + * --------------------------------------------------------------------------- + * Local variables: + * c-basic-offset: 8 + * End: + */ |