135 lines
3.9 KiB
C
135 lines
3.9 KiB
C
/* $NetBSD: lm700x.c,v 1.3 2005/12/11 12:21:27 christos Exp $ */
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/* $OpenBSD: lm700x.c,v 1.2 2001/12/06 16:28:18 mickey Exp $ */
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/*
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* Copyright (c) 2001 Vladimir Popov <jumbo@narod.ru>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* Implementation of most common lm700x routines */
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/*
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* Sanyo LM7001 Direct PLL Frequency Synthesizer
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* ??? See http://www.redsword.com/tjacobs/geeb/fmcard.htm
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*
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* The LM7001J and LM7001JM (used in Aztech/PackardBell cards) are PLL
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* frequency synthesizer LSIs for tuners. These LSIs are software compatible
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* with LM7000 (used in Radiotrack, Radioreveal RA300, some Mediaforte cards),
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* but do not include an IF calculation circuit.
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*
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* The FM VCO circuit includes a high-speed programmable divider that can
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* divide directly.
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*
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* Features:
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* Seven reference frequencies: 1, 5, 9, 10, 25, 50, and 100 kHz;
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* Band-switching outputs (3 bits);
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* Controller clock output (400 kHz);
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* Serial input circuit for data input (using the CE, CL and DATA pins).
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*
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* The LM7001J and LM7001JM have a 24-bit shift register.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: lm700x.c,v 1.3 2005/12/11 12:21:27 christos Exp $");
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#include <sys/param.h>
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#include <sys/radioio.h>
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#include <dev/ic/lm700x.h>
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u_int32_t
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lm700x_encode_freq(u_int32_t nfreq, u_int32_t rf)
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{
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nfreq += IF_FREQ;
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nfreq /= lm700x_decode_ref(rf);
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return nfreq;
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}
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void
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lm700x_hardware_write(struct lm700x_t *lm, u_int32_t data, u_int32_t addon)
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{
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int i;
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lm->init(lm->iot, lm->ioh, lm->offset, lm->rsetdata | addon);
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for (i = 0; i < LM700X_REGISTER_LENGTH; i++)
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if (data & (1 << i)) {
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bus_space_write_1(lm->iot, lm->ioh, lm->offset,
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lm->wocl | addon);
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DELAY(LM700X_WRITE_DELAY);
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bus_space_write_1(lm->iot, lm->ioh, lm->offset,
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lm->woch | addon);
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DELAY(LM700X_WRITE_DELAY);
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bus_space_write_1(lm->iot, lm->ioh, lm->offset,
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lm->wocl | addon);
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} else {
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bus_space_write_1(lm->iot, lm->ioh, lm->offset,
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lm->wzcl | addon);
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DELAY(LM700X_WRITE_DELAY);
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bus_space_write_1(lm->iot, lm->ioh, lm->offset,
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lm->wzch | addon);
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DELAY(LM700X_WRITE_DELAY);
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bus_space_write_1(lm->iot, lm->ioh, lm->offset,
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lm->wzcl | addon);
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}
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lm->rset(lm->iot, lm->ioh, lm->offset, lm->rsetdata | addon);
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}
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u_int32_t
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lm700x_encode_ref(u_int8_t rf)
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{
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u_int32_t ret;
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if (rf < 36)
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ret = LM700X_REF_025;
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else if (rf > 35 && rf < 75)
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ret = LM700X_REF_050;
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else
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ret = LM700X_REF_100;
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return ret;
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}
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u_int8_t
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lm700x_decode_ref(u_int32_t rf)
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{
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u_int8_t ret;
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switch (rf) {
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case LM700X_REF_100:
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ret = 100;
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break;
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case LM700X_REF_025:
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ret = 25;
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break;
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case LM700X_REF_050:
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/* FALLTHROUGH */
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default:
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ret = 50;
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break;
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}
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return ret;
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}
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