Annotation of sys/dev/isa/radiotrack2.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: radiotrack2.c,v 1.3 2002/01/07 18:32:19 mickey Exp $ */
! 2: /* $RuOBSD: radiotrack2.c,v 1.2 2001/10/18 16:51:36 pva Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 2001 Maxim Tsyplakov <tm@oganer.net>,
! 6: * Vladimir Popov <jumbo@narod.ru>
! 7: * All rights reserved.
! 8: *
! 9: * Redistribution and use in source and binary forms, with or without
! 10: * modification, are permitted provided that the following conditions
! 11: * are met:
! 12: * 1. Redistributions of source code must retain the above copyright
! 13: * notice, this list of conditions and the following disclaimer.
! 14: * 2. Redistributions in binary form must reproduce the above copyright
! 15: * notice, this list of conditions and the following disclaimer in the
! 16: * documentation and/or other materials provided with the distribution.
! 17: *
! 18: * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
! 19: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 20: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 21: * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
! 22: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 23: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 24: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 25: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 26: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 27: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 28: */
! 29:
! 30: /* AIMS Lab Radiotrack II FM Radio Card device driver */
! 31:
! 32: /*
! 33: * Philips TEA5757H AM/FM Self Tuned Radio:
! 34: * http://www.semiconductors.philips.com/pip/TEA5757H
! 35: */
! 36:
! 37: #include <sys/param.h>
! 38: #include <sys/systm.h>
! 39: #include <sys/proc.h>
! 40: #include <sys/errno.h>
! 41: #include <sys/ioctl.h>
! 42: #include <sys/device.h>
! 43: #include <sys/radioio.h>
! 44:
! 45: #include <dev/isa/isavar.h>
! 46: #include <dev/radio_if.h>
! 47: #include <dev/ic/tea5757.h>
! 48:
! 49: #define RTII_BASE_VALID(x) ((x == 0x20C) || (x == 0x30C))
! 50: #define RTII_CAPABILITIES RADIO_CAPS_DETECT_STEREO | \
! 51: RADIO_CAPS_DETECT_SIGNAL | \
! 52: RADIO_CAPS_SET_MONO | \
! 53: RADIO_CAPS_LOCK_SENSITIVITY | \
! 54: RADIO_CAPS_HW_AFC | \
! 55: RADIO_CAPS_HW_SEARCH
! 56:
! 57: #if 0
! 58: #define RTII_SIGNAL (1 << 3)
! 59: #define RTII_STEREO (1 << 3)
! 60: #endif /* 0 */
! 61:
! 62: #define RTII_MUTE 0x01
! 63: #define RTII_UNMUTE 0x00
! 64:
! 65: #define RTII_RESET 0xC8
! 66:
! 67: #define RTII_DATA_ON (1 << 2)
! 68: #define RTII_DATA_OFF (0 << 2)
! 69:
! 70: #define RTII_CLCK_ON (1 << 1)
! 71: #define RTII_CLCK_OFF (0 << 1)
! 72:
! 73: #define RTII_WREN_ON (0 << 0)
! 74: #define RTII_WREN_OFF (1 << 0)
! 75:
! 76: #define RTII_READ_CLOCK_LOW (RTII_DATA_ON | RTII_CLCK_OFF | RTII_WREN_OFF)
! 77: #define RTII_READ_CLOCK_HIGH (RTII_DATA_ON | RTII_CLCK_ON | RTII_WREN_OFF)
! 78:
! 79: int rtii_probe(struct device *, void *, void *);
! 80: void rtii_attach(struct device *, struct device * self, void *);
! 81:
! 82: int rtii_get_info(void *, struct radio_info *);
! 83: int rtii_set_info(void *, struct radio_info *);
! 84: int rtii_search(void *, int);
! 85:
! 86: /* define our interface to the higher level radio driver */
! 87: struct radio_hw_if rtii_hw_if = {
! 88: NULL, /* open */
! 89: NULL, /* close */
! 90: rtii_get_info,
! 91: rtii_set_info,
! 92: rtii_search
! 93: };
! 94:
! 95: struct rtii_softc {
! 96: struct device dev;
! 97:
! 98: u_int32_t freq;
! 99: u_int32_t stereo;
! 100: u_int32_t lock;
! 101: u_int8_t vol;
! 102: int mute;
! 103:
! 104: struct tea5757_t tea;
! 105: };
! 106:
! 107: struct cfattach rtii_ca = {
! 108: sizeof(struct rtii_softc), rtii_probe, rtii_attach
! 109: };
! 110:
! 111: struct cfdriver rtii_cd = {
! 112: NULL, "rtii", DV_DULL
! 113: };
! 114:
! 115: void rtii_set_mute(struct rtii_softc *);
! 116: int rtii_find(bus_space_tag_t, bus_space_handle_t, int);
! 117:
! 118: u_int32_t rtii_hw_read(bus_space_tag_t, bus_space_handle_t, bus_size_t);
! 119:
! 120: void rtii_init(bus_space_tag_t, bus_space_handle_t, bus_size_t, u_int32_t);
! 121: void rtii_rset(bus_space_tag_t, bus_space_handle_t, bus_size_t, u_int32_t);
! 122: void rtii_write_bit(bus_space_tag_t, bus_space_handle_t, bus_size_t, int);
! 123:
! 124: int
! 125: rtii_probe(struct device *parent, void *match, void *aux)
! 126: {
! 127: struct isa_attach_args *ia = aux;
! 128: bus_space_tag_t iot = ia->ia_iot;
! 129: bus_space_handle_t ioh;
! 130: struct cfdata *cf = match;
! 131: int iosize = 1, iobase = ia->ia_iobase;
! 132:
! 133: if (!RTII_BASE_VALID(iobase)) {
! 134: printf("rtii: configured iobase 0x%x invalid\n", iobase);
! 135: return (0);
! 136: }
! 137:
! 138: if (bus_space_map(iot, iobase, iosize, 0, &ioh))
! 139: return (0);
! 140:
! 141: if (!rtii_find(iot, ioh, cf->cf_flags)) {
! 142: bus_space_unmap(iot, ioh, iosize);
! 143: return (0);
! 144: }
! 145:
! 146: bus_space_unmap(iot, ioh, iosize);
! 147: ia->ia_iosize = iosize;
! 148: return (1);
! 149: }
! 150:
! 151: void
! 152: rtii_attach(struct device *parent, struct device *self, void *aux)
! 153: {
! 154: struct rtii_softc *sc = (void *) self;
! 155: struct isa_attach_args *ia = aux;
! 156: struct cfdata *cf = sc->dev.dv_cfdata;
! 157:
! 158: sc->tea.iot = ia->ia_iot;
! 159: sc->mute = 0;
! 160: sc->vol = 0;
! 161: sc->freq = MIN_FM_FREQ;
! 162: sc->stereo = TEA5757_STEREO;
! 163: sc->lock = TEA5757_S030;
! 164:
! 165: /* remap I/O */
! 166: if (bus_space_map(sc->tea.iot, ia->ia_iobase, ia->ia_iosize,
! 167: 0, &sc->tea.ioh)) {
! 168: printf(": bus_space_map() failed\n");
! 169: return;
! 170: }
! 171:
! 172: sc->tea.offset = 0;
! 173: sc->tea.flags = cf->cf_flags;
! 174:
! 175: sc->tea.init = rtii_init;
! 176: sc->tea.rset = rtii_rset;
! 177: sc->tea.write_bit = rtii_write_bit;
! 178: sc->tea.read = rtii_hw_read;
! 179:
! 180: printf(": AIMS Lab Radiotrack II\n");
! 181: tea5757_set_freq(&sc->tea, sc->stereo, sc->lock, sc->freq);
! 182: rtii_set_mute(sc);
! 183:
! 184: radio_attach_mi(&rtii_hw_if, sc, &sc->dev);
! 185: }
! 186:
! 187: /*
! 188: * Mute/unmute the card
! 189: */
! 190: void
! 191: rtii_set_mute(struct rtii_softc *sc)
! 192: {
! 193: u_int8_t mute;
! 194:
! 195: mute = (sc->mute || !sc->vol) ? RTII_MUTE : RTII_UNMUTE;
! 196: bus_space_write_1(sc->tea.iot, sc->tea.ioh, 0, mute);
! 197: DELAY(6);
! 198: bus_space_write_1(sc->tea.iot, sc->tea.ioh, 0, mute);
! 199: }
! 200:
! 201: void
! 202: rtii_init(bus_space_tag_t iot, bus_space_handle_t ioh, bus_size_t off, u_int32_t d)
! 203: {
! 204: bus_space_write_1(iot, ioh, off, RTII_RESET | RTII_WREN_OFF);
! 205: bus_space_write_1(iot, ioh, off, RTII_RESET | RTII_WREN_ON);
! 206: bus_space_write_1(iot, ioh, off, RTII_RESET | RTII_WREN_ON);
! 207: }
! 208:
! 209: void
! 210: rtii_rset(bus_space_tag_t iot, bus_space_handle_t ioh, bus_size_t off, u_int32_t d)
! 211: {
! 212: bus_space_write_1(iot, ioh, off, RTII_RESET | RTII_WREN_OFF);
! 213: }
! 214:
! 215: int
! 216: rtii_find(bus_space_tag_t iot, bus_space_handle_t ioh, int flags)
! 217: {
! 218: struct rtii_softc sc;
! 219: u_int32_t freq;
! 220:
! 221: sc.tea.iot = iot;
! 222: sc.tea.ioh = ioh;
! 223: sc.tea.offset = 0;
! 224: sc.tea.flags = flags;
! 225: sc.tea.init = rtii_init;
! 226: sc.tea.rset = rtii_rset;
! 227: sc.tea.write_bit = rtii_write_bit;
! 228: sc.tea.read = rtii_hw_read;
! 229: sc.lock = TEA5757_S030;
! 230: sc.stereo = TEA5757_STEREO;
! 231:
! 232: /*
! 233: * Let's try to write and read a frequency.
! 234: * If the written and read frequencies are
! 235: * the same then success.
! 236: */
! 237: sc.freq = MIN_FM_FREQ;
! 238: tea5757_set_freq(&sc.tea, sc.stereo, sc.lock, sc.freq);
! 239: rtii_set_mute(&sc);
! 240: freq = rtii_hw_read(iot, ioh, sc.tea.offset);
! 241: if (tea5757_decode_freq(freq, sc.tea.flags & TEA5757_TEA5759)
! 242: == sc.freq)
! 243: return 1;
! 244:
! 245: return 0;
! 246: }
! 247:
! 248: void
! 249: rtii_write_bit(bus_space_tag_t iot, bus_space_handle_t ioh, bus_size_t off, int bit)
! 250: {
! 251: u_int8_t data;
! 252:
! 253: data = bit ? RTII_DATA_ON : RTII_DATA_OFF;
! 254:
! 255: bus_space_write_1(iot, ioh, off, RTII_WREN_ON | RTII_CLCK_OFF | data);
! 256: bus_space_write_1(iot, ioh, off, RTII_WREN_ON | RTII_CLCK_ON | data);
! 257: bus_space_write_1(iot, ioh, off, RTII_WREN_ON | RTII_CLCK_OFF | data);
! 258: }
! 259:
! 260: u_int32_t
! 261: rtii_hw_read(bus_space_tag_t iot, bus_space_handle_t ioh, bus_size_t off)
! 262: {
! 263: u_int8_t i;
! 264: u_int32_t res = 0;
! 265:
! 266: bus_space_write_1(iot, ioh, off, RTII_READ_CLOCK_LOW);
! 267: DELAY(6);
! 268:
! 269: i = 24;
! 270: while ( i-- ) {
! 271: bus_space_write_1(iot, ioh, off, RTII_READ_CLOCK_HIGH);
! 272: DELAY(6);
! 273: bus_space_write_1(iot, ioh, off, RTII_READ_CLOCK_LOW);
! 274: res |= bus_space_read_1(iot, ioh, off) & RTII_DATA_ON ? 1 : 0;
! 275: DELAY(6);
! 276: res <<= 1;
! 277: }
! 278:
! 279: return (res & (TEA5757_DATA | TEA5757_FREQ)) >> 1;
! 280: }
! 281:
! 282: int
! 283: rtii_get_info(void *v, struct radio_info *ri)
! 284: {
! 285: struct rtii_softc *sc = v;
! 286:
! 287: ri->mute = sc->mute;
! 288: ri->volume = sc->vol ? 255 : 0;
! 289: ri->stereo = sc->stereo == TEA5757_STEREO ? 1 : 0;
! 290: ri->caps = RTII_CAPABILITIES;
! 291: ri->rfreq = 0;
! 292: ri->lock = tea5757_decode_lock(sc->lock);
! 293:
! 294: ri->freq = sc->freq = tea5757_decode_freq(rtii_hw_read(sc->tea.iot,
! 295: sc->tea.ioh, sc->tea.offset), sc->tea.flags & TEA5757_TEA5759);
! 296:
! 297: switch (bus_space_read_1(sc->tea.iot, sc->tea.ioh, 0)) {
! 298: case 0xFD:
! 299: ri->info = RADIO_INFO_SIGNAL | RADIO_INFO_STEREO;
! 300: break;
! 301: case 0xFF:
! 302: ri->info = 0;
! 303: break;
! 304: default:
! 305: ri->info = RADIO_INFO_SIGNAL;
! 306: }
! 307:
! 308: return (0);
! 309: }
! 310:
! 311: int
! 312: rtii_set_info(void *v, struct radio_info *ri)
! 313: {
! 314: struct rtii_softc *sc = v;
! 315:
! 316: sc->mute = ri->mute ? 1 : 0;
! 317: sc->vol = ri->volume ? 255 : 0;
! 318: sc->stereo = ri->stereo ? TEA5757_STEREO: TEA5757_MONO;
! 319: sc->lock = tea5757_encode_lock(ri->lock);
! 320: ri->freq = sc->freq = tea5757_set_freq(&sc->tea,
! 321: sc->lock, sc->stereo, ri->freq);
! 322: rtii_set_mute(sc);
! 323:
! 324: return (0);
! 325: }
! 326:
! 327: int
! 328: rtii_search(void *v, int f)
! 329: {
! 330: struct rtii_softc *sc = v;
! 331:
! 332: tea5757_search(&sc->tea, sc->lock, sc->stereo, f);
! 333: rtii_set_mute(sc);
! 334:
! 335: return (0);
! 336: }
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