/* $OpenBSD: aztech.c,v 1.3 2002/01/02 19:36:51 mickey Exp $ */ /* $RuOBSD: aztech.c,v 1.11 2001/10/20 13:23:47 pva Exp $ */ /* * Copyright (c) 2001 Maxim Tsyplakov , * Vladimir Popov * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* Aztech/PackardBell FM Radio Card device driver */ /* * Sanyo LM7001J Direct PLL Frequency Synthesizer: * ??? See http://www.redsword.com/tjacobs/geeb/fmcard.htm * * Philips TEA5712T AM/FM Stereo DTS Radio: * http://www.semiconductors.philips.com/pip/TEA5712 */ #include #include #include #include #include #include #include #include #include #include #include #define RF_25K 25 #define RF_50K 50 #define RF_100K 100 #define MAX_VOL 3 #define VOLUME_RATIO(x) (255 * x / MAX_VOL) #define AZ_BASE_VALID(x) ((x == 0x350) || (x == 0x358)) #define AZTECH_CAPABILITIES RADIO_CAPS_DETECT_STEREO | \ RADIO_CAPS_DETECT_SIGNAL | \ RADIO_CAPS_SET_MONO | \ RADIO_CAPS_REFERENCE_FREQ #define AZ_WREN_ON (1 << 1) #define AZ_WREN_OFF (0 << 1) #define AZ_CLCK_ON (1 << 6) #define AZ_CLCK_OFF (0 << 6) #define AZ_DATA_ON (1 << 7) #define AZ_DATA_OFF (0 << 7) int az_probe(struct device *, void *, void *); void az_attach(struct device *, struct device * self, void *); int az_get_info(void *, struct radio_info *); int az_set_info(void *, struct radio_info *); struct radio_hw_if az_hw_if = { NULL, /* open */ NULL, /* close */ az_get_info, az_set_info, NULL }; struct az_softc { struct device sc_dev; int mute; u_int8_t vol; u_int32_t freq; u_int32_t rf; u_int32_t stereo; struct lm700x_t lm; }; struct cfattach az_ca = { sizeof(struct az_softc), az_probe, az_attach }; struct cfdriver az_cd = { NULL, "az", DV_DULL }; u_int az_find(bus_space_tag_t, bus_space_handle_t); void az_set_mute(struct az_softc *); void az_set_freq(struct az_softc *, u_int32_t); u_int8_t az_state(bus_space_tag_t, bus_space_handle_t); void az_lm700x_init(bus_space_tag_t, bus_space_handle_t, bus_size_t, u_int32_t); void az_lm700x_rset(bus_space_tag_t, bus_space_handle_t, bus_size_t, u_int32_t); u_int8_t az_conv_vol(u_int8_t); u_int8_t az_unconv_vol(u_int8_t); int az_probe(struct device *parent, void *self, void *aux) { struct isa_attach_args *ia = aux; bus_space_tag_t iot = ia->ia_iot; bus_space_handle_t ioh; int iosize = 1, iobase = ia->ia_iobase; if (!AZ_BASE_VALID(iobase)) { printf("az: configured iobase 0x%x invalid\n", iobase); return (0); } if (bus_space_map(iot, iobase, iosize, 0, &ioh)) return (0); if (!az_find(iot, ioh)) { bus_space_unmap(iot, ioh, iosize); return (0); } bus_space_unmap(iot, ioh, iosize); ia->ia_iosize = iosize; return (1); } void az_attach(struct device *parent, struct device *self, void *aux) { struct az_softc *sc = (void *) self; struct isa_attach_args *ia = aux; sc->lm.iot = ia->ia_iot; sc->rf = LM700X_REF_050; sc->stereo = LM700X_STEREO; sc->mute = 0; sc->freq = MIN_FM_FREQ; sc->vol = 0; /* remap I/O */ if (bus_space_map(sc->lm.iot, ia->ia_iobase, ia->ia_iosize, 0, &sc->lm.ioh)) { printf(": bus_space_map() failed\n"); return; } printf(": Aztech/PackardBell\n"); /* Configure struct lm700x_t lm */ sc->lm.offset = 0; sc->lm.wzcl = AZ_WREN_ON | AZ_CLCK_OFF | AZ_DATA_OFF; sc->lm.wzch = AZ_WREN_ON | AZ_CLCK_ON | AZ_DATA_OFF; sc->lm.wocl = AZ_WREN_ON | AZ_CLCK_OFF | AZ_DATA_ON; sc->lm.woch = AZ_WREN_ON | AZ_CLCK_ON | AZ_DATA_ON; sc->lm.initdata = 0; sc->lm.rsetdata = AZ_DATA_ON | AZ_CLCK_ON | AZ_WREN_OFF; sc->lm.init = az_lm700x_init; sc->lm.rset = az_lm700x_rset; az_set_freq(sc, sc->freq); radio_attach_mi(&az_hw_if, sc, &sc->sc_dev); } /* * Mute the card */ void az_set_mute(struct az_softc *sc) { bus_space_write_1(sc->lm.iot, sc->lm.ioh, 0, sc->mute ? 0 : sc->vol); DELAY(6); bus_space_write_1(sc->lm.iot, sc->lm.ioh, 0, sc->mute ? 0 : sc->vol); } void az_set_freq(struct az_softc *sc, u_int32_t nfreq) { u_int8_t vol; u_int32_t reg; vol = sc->mute ? 0 : sc->vol; if (nfreq > MAX_FM_FREQ) nfreq = MAX_FM_FREQ; if (nfreq < MIN_FM_FREQ) nfreq = MIN_FM_FREQ; sc->freq = nfreq; reg = lm700x_encode_freq(nfreq, sc->rf); reg |= sc->stereo | sc->rf | LM700X_DIVIDER_FM; lm700x_hardware_write(&sc->lm, reg, vol); az_set_mute(sc); } /* * Return state of the card - tuned/not tuned, mono/stereo */ u_int8_t az_state(bus_space_tag_t iot, bus_space_handle_t ioh) { return (3 ^ bus_space_read_1(iot, ioh, 0)) & 3; } /* * Convert volume to hardware representation. * The card uses bits 00000x0x to set volume. */ u_int8_t az_conv_vol(u_int8_t vol) { if (vol < VOLUME_RATIO(1)) return 0; else if (vol >= VOLUME_RATIO(1) && vol < VOLUME_RATIO(2)) return 1; else if (vol >= VOLUME_RATIO(2) && vol < VOLUME_RATIO(3)) return 4; else return 5; } /* * Convert volume from hardware representation */ u_int8_t az_unconv_vol(u_int8_t vol) { switch (vol) { case 0: return VOLUME_RATIO(0); case 1: return VOLUME_RATIO(1); case 4: return VOLUME_RATIO(2); } return VOLUME_RATIO(3); } u_int az_find(bus_space_tag_t iot, bus_space_handle_t ioh) { struct az_softc sc; u_int i, scanres = 0; sc.lm.iot = iot; sc.lm.ioh = ioh; sc.lm.offset = 0; sc.lm.wzcl = AZ_WREN_ON | AZ_CLCK_OFF | AZ_DATA_OFF; sc.lm.wzch = AZ_WREN_ON | AZ_CLCK_ON | AZ_DATA_OFF; sc.lm.wocl = AZ_WREN_ON | AZ_CLCK_OFF | AZ_DATA_ON; sc.lm.woch = AZ_WREN_ON | AZ_CLCK_ON | AZ_DATA_ON; sc.lm.initdata = 0; sc.lm.rsetdata = AZ_DATA_ON | AZ_CLCK_ON | AZ_WREN_OFF; sc.lm.init = az_lm700x_init; sc.lm.rset = az_lm700x_rset; sc.rf = LM700X_REF_050; sc.mute = 0; sc.stereo = LM700X_STEREO; sc.vol = 0; /* * Scan whole FM range. If there is a card it'll * respond on some frequency. */ for (i = MIN_FM_FREQ; !scanres && i < MAX_FM_FREQ; i += 10) { az_set_freq(&sc, i); scanres += 3 - az_state(iot, ioh); } return scanres; } void az_lm700x_init(bus_space_tag_t iot, bus_space_handle_t ioh, bus_size_t off, u_int32_t data) { /* Do nothing */ return; } void az_lm700x_rset(bus_space_tag_t iot, bus_space_handle_t ioh, bus_size_t off, u_int32_t data) { bus_space_write_1(iot, ioh, off, data); } int az_get_info(void *v, struct radio_info *ri) { struct az_softc *sc = v; ri->mute = sc->mute; ri->volume = az_unconv_vol(sc->vol); ri->stereo = sc->stereo == LM700X_STEREO ? 1 : 0; ri->caps = AZTECH_CAPABILITIES; ri->rfreq = lm700x_decode_ref(sc->rf); ri->info = az_state(sc->lm.iot, sc->lm.ioh); ri->freq = sc->freq; /* UNSUPPORTED */ ri->lock = 0; return (0); } int az_set_info(void *v, struct radio_info *ri) { struct az_softc *sc = v; sc->mute = ri->mute ? 1 : 0; sc->vol = az_conv_vol(ri->volume); sc->stereo = ri->stereo ? LM700X_STEREO : LM700X_MONO; sc->rf = lm700x_encode_ref(ri->rfreq); az_set_freq(sc, ri->freq); az_set_mute(sc); return (0); }