+++ /dev/null
-/*
- * mxl111sf-demod.c - driver for the MaxLinear MXL111SF DVB-T demodulator
- *
- * 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-demod.h"
-#include "mxl111sf-reg.h"
-
-/* debug */
-static int mxl111sf_demod_debug;
-module_param_named(debug, mxl111sf_demod_debug, int, 0644);
-MODULE_PARM_DESC(debug, "set debugging level (1=info (or-able)).");
-
-#define mxl_dbg(fmt, arg...) \
- if (mxl111sf_demod_debug) \
- mxl_printk(KERN_DEBUG, fmt, ##arg)
-
-/* ------------------------------------------------------------------------ */
-
-struct mxl111sf_demod_state {
- struct mxl111sf_state *mxl_state;
-
- struct mxl111sf_demod_config *cfg;
-
- struct dvb_frontend fe;
-};
-
-/* ------------------------------------------------------------------------ */
-
-static int mxl111sf_demod_read_reg(struct mxl111sf_demod_state *state,
- u8 addr, u8 *data)
-{
- return (state->cfg->read_reg) ?
- state->cfg->read_reg(state->mxl_state, addr, data) :
- -EINVAL;
-}
-
-static int mxl111sf_demod_write_reg(struct mxl111sf_demod_state *state,
- u8 addr, u8 data)
-{
- return (state->cfg->write_reg) ?
- state->cfg->write_reg(state->mxl_state, addr, data) :
- -EINVAL;
-}
-
-static
-int mxl111sf_demod_program_regs(struct mxl111sf_demod_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;
-}
-
-/* ------------------------------------------------------------------------ */
-/* TPS */
-
-static
-int mxl1x1sf_demod_get_tps_code_rate(struct mxl111sf_demod_state *state,
- fe_code_rate_t *code_rate)
-{
- u8 val;
- int ret = mxl111sf_demod_read_reg(state, V6_CODE_RATE_TPS_REG, &val);
- /* bit<2:0> - 000:1/2, 001:2/3, 010:3/4, 011:5/6, 100:7/8 */
- if (mxl_fail(ret))
- goto fail;
-
- switch (val & V6_CODE_RATE_TPS_MASK) {
- case 0:
- *code_rate = FEC_1_2;
- break;
- case 1:
- *code_rate = FEC_2_3;
- break;
- case 2:
- *code_rate = FEC_3_4;
- break;
- case 3:
- *code_rate = FEC_5_6;
- break;
- case 4:
- *code_rate = FEC_7_8;
- break;
- }
-fail:
- return ret;
-}
-
-static
-int mxl1x1sf_demod_get_tps_modulation(struct mxl111sf_demod_state *state,
- fe_modulation_t *modulation)
-{
- u8 val;
- int ret = mxl111sf_demod_read_reg(state, V6_MODORDER_TPS_REG, &val);
- /* Constellation, 00 : QPSK, 01 : 16QAM, 10:64QAM */
- if (mxl_fail(ret))
- goto fail;
-
- switch ((val & V6_PARAM_CONSTELLATION_MASK) >> 4) {
- case 0:
- *modulation = QPSK;
- break;
- case 1:
- *modulation = QAM_16;
- break;
- case 2:
- *modulation = QAM_64;
- break;
- }
-fail:
- return ret;
-}
-
-static
-int mxl1x1sf_demod_get_tps_guard_fft_mode(struct mxl111sf_demod_state *state,
- fe_transmit_mode_t *fft_mode)
-{
- u8 val;
- int ret = mxl111sf_demod_read_reg(state, V6_MODE_TPS_REG, &val);
- /* FFT Mode, 00:2K, 01:8K, 10:4K */
- if (mxl_fail(ret))
- goto fail;
-
- switch ((val & V6_PARAM_FFT_MODE_MASK) >> 2) {
- case 0:
- *fft_mode = TRANSMISSION_MODE_2K;
- break;
- case 1:
- *fft_mode = TRANSMISSION_MODE_8K;
- break;
- case 2:
- *fft_mode = TRANSMISSION_MODE_4K;
- break;
- }
-fail:
- return ret;
-}
-
-static
-int mxl1x1sf_demod_get_tps_guard_interval(struct mxl111sf_demod_state *state,
- fe_guard_interval_t *guard)
-{
- u8 val;
- int ret = mxl111sf_demod_read_reg(state, V6_CP_TPS_REG, &val);
- /* 00:1/32, 01:1/16, 10:1/8, 11:1/4 */
- if (mxl_fail(ret))
- goto fail;
-
- switch ((val & V6_PARAM_GI_MASK) >> 4) {
- case 0:
- *guard = GUARD_INTERVAL_1_32;
- break;
- case 1:
- *guard = GUARD_INTERVAL_1_16;
- break;
- case 2:
- *guard = GUARD_INTERVAL_1_8;
- break;
- case 3:
- *guard = GUARD_INTERVAL_1_4;
- break;
- }
-fail:
- return ret;
-}
-
-static
-int mxl1x1sf_demod_get_tps_hierarchy(struct mxl111sf_demod_state *state,
- fe_hierarchy_t *hierarchy)
-{
- u8 val;
- int ret = mxl111sf_demod_read_reg(state, V6_TPS_HIERACHY_REG, &val);
- /* bit<6:4> - 000:Non hierarchy, 001:1, 010:2, 011:4 */
- if (mxl_fail(ret))
- goto fail;
-
- switch ((val & V6_TPS_HIERARCHY_INFO_MASK) >> 6) {
- case 0:
- *hierarchy = HIERARCHY_NONE;
- break;
- case 1:
- *hierarchy = HIERARCHY_1;
- break;
- case 2:
- *hierarchy = HIERARCHY_2;
- break;
- case 3:
- *hierarchy = HIERARCHY_4;
- break;
- }
-fail:
- return ret;
-}
-
-/* ------------------------------------------------------------------------ */
-/* LOCKS */
-
-static
-int mxl1x1sf_demod_get_sync_lock_status(struct mxl111sf_demod_state *state,
- int *sync_lock)
-{
- u8 val = 0;
- int ret = mxl111sf_demod_read_reg(state, V6_SYNC_LOCK_REG, &val);
- if (mxl_fail(ret))
- goto fail;
- *sync_lock = (val & SYNC_LOCK_MASK) >> 4;
-fail:
- return ret;
-}
-
-static
-int mxl1x1sf_demod_get_rs_lock_status(struct mxl111sf_demod_state *state,
- int *rs_lock)
-{
- u8 val = 0;
- int ret = mxl111sf_demod_read_reg(state, V6_RS_LOCK_DET_REG, &val);
- if (mxl_fail(ret))
- goto fail;
- *rs_lock = (val & RS_LOCK_DET_MASK) >> 3;
-fail:
- return ret;
-}
-
-static
-int mxl1x1sf_demod_get_tps_lock_status(struct mxl111sf_demod_state *state,
- int *tps_lock)
-{
- u8 val = 0;
- int ret = mxl111sf_demod_read_reg(state, V6_TPS_LOCK_REG, &val);
- if (mxl_fail(ret))
- goto fail;
- *tps_lock = (val & V6_PARAM_TPS_LOCK_MASK) >> 6;
-fail:
- return ret;
-}
-
-static
-int mxl1x1sf_demod_get_fec_lock_status(struct mxl111sf_demod_state *state,
- int *fec_lock)
-{
- u8 val = 0;
- int ret = mxl111sf_demod_read_reg(state, V6_IRQ_STATUS_REG, &val);
- if (mxl_fail(ret))
- goto fail;
- *fec_lock = (val & IRQ_MASK_FEC_LOCK) >> 4;
-fail:
- return ret;
-}
-
-#if 0
-static
-int mxl1x1sf_demod_get_cp_lock_status(struct mxl111sf_demod_state *state,
- int *cp_lock)
-{
- u8 val = 0;
- int ret = mxl111sf_demod_read_reg(state, V6_CP_LOCK_DET_REG, &val);
- if (mxl_fail(ret))
- goto fail;
- *cp_lock = (val & V6_CP_LOCK_DET_MASK) >> 2;
-fail:
- return ret;
-}
-#endif
-
-static int mxl1x1sf_demod_reset_irq_status(struct mxl111sf_demod_state *state)
-{
- return mxl111sf_demod_write_reg(state, 0x0e, 0xff);
-}
-
-/* ------------------------------------------------------------------------ */
-
-static int mxl111sf_demod_set_frontend(struct dvb_frontend *fe)
-{
- struct mxl111sf_demod_state *state = fe->demodulator_priv;
- int ret = 0;
-
- struct mxl111sf_reg_ctrl_info phy_pll_patch[] = {
- {0x00, 0xff, 0x01}, /* change page to 1 */
- {0x40, 0xff, 0x05},
- {0x40, 0xff, 0x01},
- {0x41, 0xff, 0xca},
- {0x41, 0xff, 0xc0},
- {0x00, 0xff, 0x00}, /* change page to 0 */
- {0, 0, 0}
- };
-
- mxl_dbg("()");
-
- if (fe->ops.tuner_ops.set_params) {
- ret = fe->ops.tuner_ops.set_params(fe);
- if (mxl_fail(ret))
- goto fail;
- msleep(50);
- }
- ret = mxl111sf_demod_program_regs(state, phy_pll_patch);
- mxl_fail(ret);
- msleep(50);
- ret = mxl1x1sf_demod_reset_irq_status(state);
- mxl_fail(ret);
- msleep(100);
-fail:
- return ret;
-}
-
-/* ------------------------------------------------------------------------ */
-
-#if 0
-/* resets TS Packet error count */
-/* After setting 7th bit of V5_PER_COUNT_RESET_REG, it should be reset to 0. */
-static
-int mxl1x1sf_demod_reset_packet_error_count(struct mxl111sf_demod_state *state)
-{
- struct mxl111sf_reg_ctrl_info reset_per_count[] = {
- {0x20, 0x01, 0x01},
- {0x20, 0x01, 0x00},
- {0, 0, 0}
- };
- return mxl111sf_demod_program_regs(state, reset_per_count);
-}
-#endif
-
-/* returns TS Packet error count */
-/* PER Count = FEC_PER_COUNT * (2 ** (FEC_PER_SCALE * 4)) */
-static int mxl111sf_demod_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
-{
- struct mxl111sf_demod_state *state = fe->demodulator_priv;
- u32 fec_per_count, fec_per_scale;
- u8 val;
- int ret;
-
- *ucblocks = 0;
-
- /* FEC_PER_COUNT Register */
- ret = mxl111sf_demod_read_reg(state, V6_FEC_PER_COUNT_REG, &val);
- if (mxl_fail(ret))
- goto fail;
-
- fec_per_count = val;
-
- /* FEC_PER_SCALE Register */
- ret = mxl111sf_demod_read_reg(state, V6_FEC_PER_SCALE_REG, &val);
- if (mxl_fail(ret))
- goto fail;
-
- val &= V6_FEC_PER_SCALE_MASK;
- val *= 4;
-
- fec_per_scale = 1 << val;
-
- fec_per_count *= fec_per_scale;
-
- *ucblocks = fec_per_count;
-fail:
- return ret;
-}
-
-#ifdef MXL111SF_DEMOD_ENABLE_CALCULATIONS
-/* FIXME: leaving this enabled breaks the build on some architectures,
- * and we shouldn't have any floating point math in the kernel, anyway.
- *
- * These macros need to be re-written, but it's harmless to simply
- * return zero for now. */
-#define CALCULATE_BER(avg_errors, count) \
- ((u32)(avg_errors * 4)/(count*64*188*8))
-#define CALCULATE_SNR(data) \
- ((u32)((10 * (u32)data / 64) - 2.5))
-#else
-#define CALCULATE_BER(avg_errors, count) 0
-#define CALCULATE_SNR(data) 0
-#endif
-
-static int mxl111sf_demod_read_ber(struct dvb_frontend *fe, u32 *ber)
-{
- struct mxl111sf_demod_state *state = fe->demodulator_priv;
- u8 val1, val2, val3;
- int ret;
-
- *ber = 0;
-
- ret = mxl111sf_demod_read_reg(state, V6_RS_AVG_ERRORS_LSB_REG, &val1);
- if (mxl_fail(ret))
- goto fail;
- ret = mxl111sf_demod_read_reg(state, V6_RS_AVG_ERRORS_MSB_REG, &val2);
- if (mxl_fail(ret))
- goto fail;
- ret = mxl111sf_demod_read_reg(state, V6_N_ACCUMULATE_REG, &val3);
- if (mxl_fail(ret))
- goto fail;
-
- *ber = CALCULATE_BER((val1 | (val2 << 8)), val3);
-fail:
- return ret;
-}
-
-static int mxl111sf_demod_calc_snr(struct mxl111sf_demod_state *state,
- u16 *snr)
-{
- u8 val1, val2;
- int ret;
-
- *snr = 0;
-
- ret = mxl111sf_demod_read_reg(state, V6_SNR_RB_LSB_REG, &val1);
- if (mxl_fail(ret))
- goto fail;
- ret = mxl111sf_demod_read_reg(state, V6_SNR_RB_MSB_REG, &val2);
- if (mxl_fail(ret))
- goto fail;
-
- *snr = CALCULATE_SNR(val1 | ((val2 & 0x03) << 8));
-fail:
- return ret;
-}
-
-static int mxl111sf_demod_read_snr(struct dvb_frontend *fe, u16 *snr)
-{
- struct mxl111sf_demod_state *state = fe->demodulator_priv;
-
- int ret = mxl111sf_demod_calc_snr(state, snr);
- if (mxl_fail(ret))
- goto fail;
-
- *snr /= 10; /* 0.1 dB */
-fail:
- return ret;
-}
-
-static int mxl111sf_demod_read_status(struct dvb_frontend *fe,
- fe_status_t *status)
-{
- struct mxl111sf_demod_state *state = fe->demodulator_priv;
- int ret, locked, cr_lock, sync_lock, fec_lock;
-
- *status = 0;
-
- ret = mxl1x1sf_demod_get_rs_lock_status(state, &locked);
- if (mxl_fail(ret))
- goto fail;
- ret = mxl1x1sf_demod_get_tps_lock_status(state, &cr_lock);
- if (mxl_fail(ret))
- goto fail;
- ret = mxl1x1sf_demod_get_sync_lock_status(state, &sync_lock);
- if (mxl_fail(ret))
- goto fail;
- ret = mxl1x1sf_demod_get_fec_lock_status(state, &fec_lock);
- if (mxl_fail(ret))
- goto fail;
-
- if (locked)
- *status |= FE_HAS_SIGNAL;
- if (cr_lock)
- *status |= FE_HAS_CARRIER;
- if (sync_lock)
- *status |= FE_HAS_SYNC;
- if (fec_lock) /* false positives? */
- *status |= FE_HAS_VITERBI;
-
- if ((locked) && (cr_lock) && (sync_lock))
- *status |= FE_HAS_LOCK;
-fail:
- return ret;
-}
-
-static int mxl111sf_demod_read_signal_strength(struct dvb_frontend *fe,
- u16 *signal_strength)
-{
- struct mxl111sf_demod_state *state = fe->demodulator_priv;
- fe_modulation_t modulation;
- u16 snr;
-
- mxl111sf_demod_calc_snr(state, &snr);
- mxl1x1sf_demod_get_tps_modulation(state, &modulation);
-
- switch (modulation) {
- case QPSK:
- *signal_strength = (snr >= 1300) ?
- min(65535, snr * 44) : snr * 38;
- break;
- case QAM_16:
- *signal_strength = (snr >= 1500) ?
- min(65535, snr * 38) : snr * 33;
- break;
- case QAM_64:
- *signal_strength = (snr >= 2000) ?
- min(65535, snr * 29) : snr * 25;
- break;
- default:
- *signal_strength = 0;
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int mxl111sf_demod_get_frontend(struct dvb_frontend *fe)
-{
- struct dtv_frontend_properties *p = &fe->dtv_property_cache;
- struct mxl111sf_demod_state *state = fe->demodulator_priv;
-
- mxl_dbg("()");
-#if 0
- p->inversion = /* FIXME */ ? INVERSION_ON : INVERSION_OFF;
-#endif
- if (fe->ops.tuner_ops.get_bandwidth)
- fe->ops.tuner_ops.get_bandwidth(fe, &p->bandwidth_hz);
- if (fe->ops.tuner_ops.get_frequency)
- fe->ops.tuner_ops.get_frequency(fe, &p->frequency);
- mxl1x1sf_demod_get_tps_code_rate(state, &p->code_rate_HP);
- mxl1x1sf_demod_get_tps_code_rate(state, &p->code_rate_LP);
- mxl1x1sf_demod_get_tps_modulation(state, &p->modulation);
- mxl1x1sf_demod_get_tps_guard_fft_mode(state,
- &p->transmission_mode);
- mxl1x1sf_demod_get_tps_guard_interval(state,
- &p->guard_interval);
- mxl1x1sf_demod_get_tps_hierarchy(state,
- &p->hierarchy);
-
- return 0;
-}
-
-static
-int mxl111sf_demod_get_tune_settings(struct dvb_frontend *fe,
- struct dvb_frontend_tune_settings *tune)
-{
- tune->min_delay_ms = 1000;
- return 0;
-}
-
-static void mxl111sf_demod_release(struct dvb_frontend *fe)
-{
- struct mxl111sf_demod_state *state = fe->demodulator_priv;
- mxl_dbg("()");
- kfree(state);
- fe->demodulator_priv = NULL;
-}
-
-static struct dvb_frontend_ops mxl111sf_demod_ops = {
- .delsys = { SYS_DVBT },
- .info = {
- .name = "MaxLinear MxL111SF DVB-T demodulator",
- .frequency_min = 177000000,
- .frequency_max = 858000000,
- .frequency_stepsize = 166666,
- .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_HIERARCHY_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
- FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_RECOVER
- },
- .release = mxl111sf_demod_release,
-#if 0
- .init = mxl111sf_init,
- .i2c_gate_ctrl = mxl111sf_i2c_gate_ctrl,
-#endif
- .set_frontend = mxl111sf_demod_set_frontend,
- .get_frontend = mxl111sf_demod_get_frontend,
- .get_tune_settings = mxl111sf_demod_get_tune_settings,
- .read_status = mxl111sf_demod_read_status,
- .read_signal_strength = mxl111sf_demod_read_signal_strength,
- .read_ber = mxl111sf_demod_read_ber,
- .read_snr = mxl111sf_demod_read_snr,
- .read_ucblocks = mxl111sf_demod_read_ucblocks,
-};
-
-struct dvb_frontend *mxl111sf_demod_attach(struct mxl111sf_state *mxl_state,
- struct mxl111sf_demod_config *cfg)
-{
- struct mxl111sf_demod_state *state = NULL;
-
- mxl_dbg("()");
-
- state = kzalloc(sizeof(struct mxl111sf_demod_state), GFP_KERNEL);
- if (state == NULL)
- return NULL;
-
- state->mxl_state = mxl_state;
- state->cfg = cfg;
-
- memcpy(&state->fe.ops, &mxl111sf_demod_ops,
- sizeof(struct dvb_frontend_ops));
-
- state->fe.demodulator_priv = state;
- return &state->fe;
-}
-EXPORT_SYMBOL_GPL(mxl111sf_demod_attach);
-
-MODULE_DESCRIPTION("MaxLinear MxL111SF DVB-T demodulator driver");
-MODULE_AUTHOR("Michael Krufky <mkrufky@kernellabs.com>");
-MODULE_LICENSE("GPL");
-MODULE_VERSION("0.1");
-
-/*
- * Local variables:
- * c-basic-offset: 8
- * End:
- */
git.samba.org / sfrench / cifs-2.6.git / blobdiff