aztech.c revision 1.2
1 /* $NetBSD: aztech.c,v 1.2 2002/01/02 12:42:23 augustss Exp $ */ 2 /* $OpenBSD: aztech.c,v 1.2 2001/12/05 10:27:06 mickey Exp $ */ 3 /* $RuOBSD: aztech.c,v 1.11 2001/10/20 13:23:47 pva Exp $ */ 4 5 /* 6 * Copyright (c) 2001 Maxim Tsyplakov <tm (at) oganer.net>, 7 * Vladimir Popov <jumbo (at) narod.ru> 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 /* Aztech/PackardBell FM Radio Card device driver */ 32 33 /* 34 * Sanyo LM7001J Direct PLL Frequency Synthesizer: 35 * ??? See http://www.redsword.com/tjacobs/geeb/fmcard.htm 36 * 37 * Philips TEA5712T AM/FM Stereo DTS Radio: 38 * http://www.semiconductors.philips.com/pip/TEA5712 39 */ 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/proc.h> 44 #include <sys/errno.h> 45 #include <sys/ioctl.h> 46 #include <sys/device.h> 47 #include <sys/radioio.h> 48 49 #include <machine/bus.h> 50 51 #include <dev/isa/isavar.h> 52 #include <dev/ic/lm700x.h> 53 #include <dev/radio_if.h> 54 55 #define RF_25K 25 56 #define RF_50K 50 57 #define RF_100K 100 58 59 #define MAX_VOL 3 60 #define VOLUME_RATIO(x) (255 * x / MAX_VOL) 61 62 #define AZ_BASE_VALID(x) ((x == 0x350) || (x == 0x358)) 63 #define AZTECH_CAPABILITIES RADIO_CAPS_DETECT_STEREO | \ 64 RADIO_CAPS_DETECT_SIGNAL | \ 65 RADIO_CAPS_SET_MONO | \ 66 RADIO_CAPS_REFERENCE_FREQ 67 68 #define AZ_WREN_ON (1 << 1) 69 #define AZ_WREN_OFF (0 << 1) 70 71 #define AZ_CLCK_ON (1 << 6) 72 #define AZ_CLCK_OFF (0 << 6) 73 74 #define AZ_DATA_ON (1 << 7) 75 #define AZ_DATA_OFF (0 << 7) 76 77 int az_probe(struct device *, struct cfdata *, void *); 78 void az_attach(struct device *, struct device * self, void *); 79 80 int az_get_info(void *, struct radio_info *); 81 int az_set_info(void *, struct radio_info *); 82 83 struct radio_hw_if az_hw_if = { 84 NULL, /* open */ 85 NULL, /* close */ 86 az_get_info, 87 az_set_info, 88 NULL 89 }; 90 91 struct az_softc { 92 struct device sc_dev; 93 94 int mute; 95 u_int8_t vol; 96 u_int32_t freq; 97 u_int32_t rf; 98 u_int32_t stereo; 99 100 struct lm700x_t lm; 101 }; 102 103 struct cfattach az_ca = { 104 sizeof(struct az_softc), az_probe, az_attach 105 }; 106 107 u_int az_find(bus_space_tag_t, bus_space_handle_t); 108 void az_set_mute(struct az_softc *); 109 void az_set_freq(struct az_softc *, u_int32_t); 110 u_int8_t az_state(bus_space_tag_t, bus_space_handle_t); 111 112 void az_lm700x_init(bus_space_tag_t, bus_space_handle_t, bus_size_t, u_int32_t); 113 void az_lm700x_rset(bus_space_tag_t, bus_space_handle_t, bus_size_t, u_int32_t); 114 115 u_int8_t az_conv_vol(u_int8_t); 116 u_int8_t az_unconv_vol(u_int8_t); 117 118 int 119 az_probe(struct device *parent, struct cfdata *cf, void *aux) 120 { 121 struct isa_attach_args *ia = aux; 122 bus_space_tag_t iot = ia->ia_iot; 123 bus_space_handle_t ioh; 124 u_int r; 125 int iosize = 1, iobase = ia->ia_iobase; 126 127 if (!AZ_BASE_VALID(iobase)) { 128 printf("az: configured iobase 0x%x invalid", iobase); 129 return 0; 130 } 131 132 if (bus_space_map(iot, iobase, iosize, 0, &ioh)) 133 return 0; 134 135 r = az_find(iot, ioh); 136 137 bus_space_unmap(iot, ioh, iosize); 138 139 ia->ia_iosize = iosize; 140 141 return (r != 0); 142 } 143 144 void 145 az_attach(struct device *parent, struct device *self, void *aux) 146 { 147 struct az_softc *sc = (void *)self; 148 struct isa_attach_args *ia = aux; 149 150 sc->lm.iot = ia->ia_iot; 151 sc->rf = LM700X_REF_050; 152 sc->stereo = LM700X_STEREO; 153 sc->mute = 0; 154 sc->freq = MIN_FM_FREQ; 155 sc->vol = 0; 156 157 /* remap I/O */ 158 if (bus_space_map(sc->lm.iot, ia->ia_iobase, ia->ia_iosize, 159 0, &sc->lm.ioh)) 160 panic(": bus_space_map() of %s failed", sc->sc_dev.dv_xname); 161 162 printf(": Aztech/PackardBell"); 163 164 /* Configure struct lm700x_t lm */ 165 sc->lm.offset = 0; 166 sc->lm.wzcl = AZ_WREN_ON | AZ_CLCK_OFF | AZ_DATA_OFF; 167 sc->lm.wzch = AZ_WREN_ON | AZ_CLCK_ON | AZ_DATA_OFF; 168 sc->lm.wocl = AZ_WREN_ON | AZ_CLCK_OFF | AZ_DATA_ON; 169 sc->lm.woch = AZ_WREN_ON | AZ_CLCK_ON | AZ_DATA_ON; 170 sc->lm.initdata = 0; 171 sc->lm.rsetdata = AZ_DATA_ON | AZ_CLCK_ON | AZ_WREN_OFF; 172 sc->lm.init = az_lm700x_init; 173 sc->lm.rset = az_lm700x_rset; 174 175 az_set_freq(sc, sc->freq); 176 177 radio_attach_mi(&az_hw_if, sc, &sc->sc_dev); 178 } 179 180 /* 181 * Mute the card 182 */ 183 void 184 az_set_mute(struct az_softc *sc) 185 { 186 bus_space_write_1(sc->lm.iot, sc->lm.ioh, 0, 187 sc->mute ? 0 : sc->vol); 188 delay(6); 189 bus_space_write_1(sc->lm.iot, sc->lm.ioh, 0, 190 sc->mute ? 0 : sc->vol); 191 } 192 193 void 194 az_set_freq(struct az_softc *sc, u_int32_t nfreq) 195 { 196 u_int8_t vol; 197 u_int32_t reg; 198 199 vol = sc->mute ? 0 : sc->vol; 200 201 if (nfreq > MAX_FM_FREQ) 202 nfreq = MAX_FM_FREQ; 203 if (nfreq < MIN_FM_FREQ) 204 nfreq = MIN_FM_FREQ; 205 206 sc->freq = nfreq; 207 208 reg = lm700x_encode_freq(nfreq, sc->rf); 209 reg |= sc->stereo | sc->rf | LM700X_DIVIDER_FM; 210 211 lm700x_hardware_write(&sc->lm, reg, vol); 212 213 az_set_mute(sc); 214 } 215 216 /* 217 * Return state of the card - tuned/not tuned, mono/stereo 218 */ 219 u_int8_t 220 az_state(bus_space_tag_t iot, bus_space_handle_t ioh) 221 { 222 return (3 ^ bus_space_read_1(iot, ioh, 0)) & 3; 223 } 224 225 /* 226 * Convert volume to hardware representation. 227 * The card uses bits 00000x0x to set volume. 228 */ 229 u_int8_t 230 az_conv_vol(u_int8_t vol) 231 { 232 if (vol < VOLUME_RATIO(1)) 233 return 0; 234 else if (vol >= VOLUME_RATIO(1) && vol < VOLUME_RATIO(2)) 235 return 1; 236 else if (vol >= VOLUME_RATIO(2) && vol < VOLUME_RATIO(3)) 237 return 4; 238 else 239 return 5; 240 } 241 242 /* 243 * Convert volume from hardware representation 244 */ 245 u_int8_t 246 az_unconv_vol(u_int8_t vol) 247 { 248 switch (vol) { 249 case 0: 250 return VOLUME_RATIO(0); 251 case 1: 252 return VOLUME_RATIO(1); 253 case 4: 254 return VOLUME_RATIO(2); 255 } 256 return VOLUME_RATIO(3); 257 } 258 259 u_int 260 az_find(bus_space_tag_t iot, bus_space_handle_t ioh) 261 { 262 struct az_softc sc; 263 u_int i, scanres = 0; 264 265 sc.lm.iot = iot; 266 sc.lm.ioh = ioh; 267 sc.lm.offset = 0; 268 sc.lm.wzcl = AZ_WREN_ON | AZ_CLCK_OFF | AZ_DATA_OFF; 269 sc.lm.wzch = AZ_WREN_ON | AZ_CLCK_ON | AZ_DATA_OFF; 270 sc.lm.wocl = AZ_WREN_ON | AZ_CLCK_OFF | AZ_DATA_ON; 271 sc.lm.woch = AZ_WREN_ON | AZ_CLCK_ON | AZ_DATA_ON; 272 sc.lm.initdata = 0; 273 sc.lm.rsetdata = AZ_DATA_ON | AZ_CLCK_ON | AZ_WREN_OFF; 274 sc.lm.init = az_lm700x_init; 275 sc.lm.rset = az_lm700x_rset; 276 sc.rf = LM700X_REF_050; 277 sc.mute = 0; 278 sc.stereo = LM700X_STEREO; 279 sc.vol = 0; 280 281 /* 282 * Scan whole FM range. If there is a card it'll 283 * respond on some frequency. 284 */ 285 for (i = MIN_FM_FREQ; !scanres && i < MAX_FM_FREQ; i += 10) { 286 az_set_freq(&sc, i); 287 scanres += 3 - az_state(iot, ioh); 288 } 289 290 return scanres; 291 } 292 293 void 294 az_lm700x_init(bus_space_tag_t iot, bus_space_handle_t ioh, bus_size_t off, 295 u_int32_t data) 296 { 297 /* Do nothing */ 298 return; 299 } 300 301 void 302 az_lm700x_rset(bus_space_tag_t iot, bus_space_handle_t ioh, bus_size_t off, 303 u_int32_t data) 304 { 305 bus_space_write_1(iot, ioh, off, data); 306 } 307 308 int 309 az_get_info(void *v, struct radio_info *ri) 310 { 311 struct az_softc *sc = v; 312 313 ri->mute = sc->mute; 314 ri->volume = az_unconv_vol(sc->vol); 315 ri->stereo = sc->stereo == LM700X_STEREO ? 1 : 0; 316 ri->caps = AZTECH_CAPABILITIES; 317 ri->rfreq = lm700x_decode_ref(sc->rf); 318 ri->info = az_state(sc->lm.iot, sc->lm.ioh); 319 ri->freq = sc->freq; 320 321 /* UNSUPPORTED */ 322 ri->lock = 0; 323 324 return (0); 325 } 326 327 int 328 az_set_info(void *v, struct radio_info *ri) 329 { 330 struct az_softc *sc = v; 331 332 sc->mute = ri->mute ? 1 : 0; 333 sc->vol = az_conv_vol(ri->volume); 334 sc->stereo = ri->stereo ? LM700X_STEREO : LM700X_MONO; 335 sc->rf = lm700x_encode_ref(ri->rfreq); 336 337 az_set_freq(sc, ri->freq); 338 az_set_mute(sc); 339 340 return (0); 341 } 342
Indexes created Wed Oct 01 19:09:53 GMT 2025