Annotation of sys/dev/isa/sf16fmr.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: sf16fmr.c,v 1.1 2002/04/25 04:56:59 mickey Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 2002 Vladimir Popov <jumbo@narod.ru>
! 5: * All rights reserved.
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: *
! 16: * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
! 17: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 18: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 19: * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
! 20: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 21: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 22: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 23: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 24: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 25: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 26: */
! 27:
! 28: /* SoundForte RadioLink SF16-FMR FM Radio Card device driver */
! 29:
! 30: #include <sys/param.h>
! 31: #include <sys/systm.h>
! 32: #include <sys/proc.h>
! 33: #include <sys/errno.h>
! 34: #include <sys/ioctl.h>
! 35: #include <sys/device.h>
! 36: #include <sys/radioio.h>
! 37:
! 38: #include <dev/isa/isavar.h>
! 39: #include <dev/radio_if.h>
! 40:
! 41: #include <dev/ic/tc921x.h>
! 42: #include <dev/ic/pt2254a.h>
! 43:
! 44: #define SF16FMR_BASE_VALID(x) (x == 0x384 || x == 0x284)
! 45:
! 46: #define SF16FMR_CAPABILITIES 0
! 47:
! 48: #define SF16FMR_FREQ_DATA 0
! 49: #define SF16FMR_FREQ_CLOCK 1
! 50: #define SF16FMR_FREQ_PERIOD 2
! 51:
! 52: #define SF16FMR_FREQ_STEADY (1 << SF16FMR_FREQ_DATA) | \
! 53: (1 << SF16FMR_FREQ_CLOCK) | \
! 54: (1 << SF16FMR_FREQ_PERIOD)
! 55:
! 56: #define SF16FMR_VOLU_STROBE_ON (1 << 3)
! 57: #define SF16FMR_VOLU_STROBE_OFF (0 << 3)
! 58: #define SF16FMR_VOLU_CLOCK_ON (1 << 4)
! 59: #define SF16FMR_VOLU_CLOCK_OFF (0 << 4)
! 60: #define SF16FMR_VOLU_DATA_ON (1 << 5)
! 61: #define SF16FMR_VOLU_DATA_OFF (0 << 5)
! 62:
! 63: int sfr_probe(struct device *, void *, void *);
! 64: void sfr_attach(struct device *, struct device * self, void *);
! 65:
! 66: int sfr_get_info(void *, struct radio_info *);
! 67: int sfr_set_info(void *, struct radio_info *);
! 68:
! 69: /* define our interface to the higher level radio driver */
! 70: struct radio_hw_if sfr_hw_if = {
! 71: NULL, /* open */
! 72: NULL, /* close */
! 73: sfr_get_info,
! 74: sfr_set_info,
! 75: NULL
! 76: };
! 77:
! 78: struct sfr_softc {
! 79: struct device sc_dev;
! 80:
! 81: u_int32_t freq;
! 82: u_int8_t vol;
! 83: int mute;
! 84:
! 85: struct tc921x_t c;
! 86: };
! 87:
! 88: struct cfattach sfr_ca = {
! 89: sizeof(struct sfr_softc), sfr_probe, sfr_attach
! 90: };
! 91:
! 92: struct cfdriver sfr_cd = {
! 93: NULL, "sfr", DV_DULL
! 94: };
! 95:
! 96: int sfr_find(bus_space_tag_t, bus_space_handle_t);
! 97: u_int32_t sfr_set_freq(struct tc921x_t *, u_int32_t);
! 98: u_int32_t sfr_get_freq(struct tc921x_t *);
! 99: u_int8_t sfr_set_vol(bus_space_tag_t, bus_space_handle_t, u_int8_t, int);
! 100: void sfr_send_volume(bus_space_tag_t, bus_space_handle_t, u_int32_t);
! 101:
! 102: int
! 103: sfr_probe(struct device *parent, void *match, void *aux)
! 104: {
! 105: struct isa_attach_args *ia = aux;
! 106: bus_space_tag_t iot = ia->ia_iot;
! 107: bus_space_handle_t ioh;
! 108: int iosize = 1, iobase = ia->ia_iobase;
! 109:
! 110: if (!SF16FMR_BASE_VALID(iobase)) {
! 111: printf("sfr: configured iobase 0x%x invalid\n", iobase);
! 112: return (0);
! 113: }
! 114:
! 115: if (bus_space_map(iot, iobase, iosize, 0, &ioh))
! 116: return (0);
! 117:
! 118: if (!sfr_find(iot, ioh)) {
! 119: bus_space_unmap(iot, ioh, iosize);
! 120: return (0);
! 121: }
! 122:
! 123: bus_space_unmap(iot, ioh, iosize);
! 124: ia->ia_iosize = iosize;
! 125: return (1);
! 126: }
! 127:
! 128: void
! 129: sfr_attach(struct device *parent, struct device *self, void *aux)
! 130: {
! 131: struct sfr_softc *sc = (void *) self;
! 132: struct isa_attach_args *ia = aux;
! 133:
! 134: sc->c.iot = ia->ia_iot;
! 135: sc->mute = 0;
! 136: sc->vol = 0;
! 137: sc->freq = MIN_FM_FREQ;
! 138: sc->c.period = SF16FMR_FREQ_PERIOD;
! 139: sc->c.clock = SF16FMR_FREQ_CLOCK;
! 140: sc->c.data = SF16FMR_FREQ_DATA;
! 141:
! 142: /* remap I/O */
! 143: if (bus_space_map(sc->c.iot, ia->ia_iobase, ia->ia_iosize,
! 144: 0, &sc->c.ioh)) {
! 145: printf(": bus_space_map() failed\n");
! 146: return;
! 147: }
! 148:
! 149: printf(": SoundForte RadioLink SF16-FMR\n");
! 150: sfr_set_freq(&sc->c, sc->freq);
! 151: sfr_set_vol(sc->c.iot, sc->c.ioh, sc->vol, sc->mute);
! 152:
! 153: radio_attach_mi(&sfr_hw_if, sc, &sc->sc_dev);
! 154: }
! 155:
! 156: int
! 157: sfr_find(bus_space_tag_t iot, bus_space_handle_t ioh)
! 158: {
! 159: struct sfr_softc sc;
! 160: u_int32_t freq;
! 161:
! 162: sc.c.iot = iot;
! 163: sc.c.ioh = ioh;
! 164: sc.c.offset = 0;
! 165: sc.c.period = SF16FMR_FREQ_PERIOD;
! 166: sc.c.clock = SF16FMR_FREQ_CLOCK;
! 167: sc.c.data = SF16FMR_FREQ_DATA;
! 168:
! 169: /*
! 170: * Let's try to write and read a frequency.
! 171: * If the written and read frequencies are
! 172: * the same then success.
! 173: */
! 174: sc.freq = MIN_FM_FREQ;
! 175: /* Initialize the tc921x chip */
! 176: sfr_set_freq(&sc.c, sc.freq);
! 177: /* Do actual frequency setting */
! 178: freq = sfr_set_freq(&sc.c, sc.freq);
! 179: if (sc.freq == freq)
! 180: return 1;
! 181:
! 182: return 0;
! 183: }
! 184:
! 185: int
! 186: sfr_get_info(void *v, struct radio_info *ri)
! 187: {
! 188: struct sfr_softc *sc = v;
! 189:
! 190: ri->mute = sc->mute;
! 191: ri->volume = sc->vol;
! 192: ri->caps = SF16FMR_CAPABILITIES;
! 193: ri->freq = sc->freq = sfr_get_freq(&sc->c);
! 194:
! 195: /* Not supported */
! 196: ri->stereo = 1; /* Always stereo */
! 197: ri->rfreq = 0;
! 198: ri->lock = 0;
! 199:
! 200: return (0);
! 201: }
! 202:
! 203: int
! 204: sfr_set_info(void *v, struct radio_info *ri)
! 205: {
! 206: struct sfr_softc *sc = v;
! 207:
! 208: sc->mute = ri->mute ? 1 : 0;
! 209: sc->vol = ri->volume;
! 210: sc->freq = sfr_set_freq(&sc->c, ri->freq);
! 211: sc->vol = sfr_set_vol(sc->c.iot, sc->c.ioh, sc->vol, sc->mute);
! 212:
! 213: return (0);
! 214: }
! 215:
! 216: u_int32_t
! 217: sfr_set_freq(struct tc921x_t *c, u_int32_t freq) {
! 218: u_int32_t data = 0ul;
! 219:
! 220: data |= tc921x_encode_freq(freq);
! 221: data |= TC921X_D0_REF_FREQ_10_KHZ;
! 222: data |= TC921X_D0_PULSE_SWALLOW_FM_MODE;
! 223: data |= TC921X_D0_OSC_7POINT2_MHZ;
! 224: data |= TC921X_D0_OUT_CONTROL_ON;
! 225: tc921x_write_addr(c, 0xD0, data);
! 226:
! 227: data = TC921X_D2_IO_PORT_OUTPUT(4);
! 228: tc921x_write_addr(c, 0xD2, data);
! 229:
! 230: return sfr_get_freq(c);
! 231: }
! 232:
! 233: u_int32_t
! 234: sfr_get_freq(struct tc921x_t *c) {
! 235: return tc921x_decode_freq(tc921x_read_addr(c, 0xD1));
! 236: }
! 237:
! 238: u_int8_t
! 239: sfr_set_vol(bus_space_tag_t iot, bus_space_handle_t ioh, u_int8_t vol, int mute) {
! 240: u_int32_t v;
! 241: u_int8_t ret;
! 242:
! 243: ret = mute ? 0 : vol;
! 244:
! 245: v = pt2254a_encode_volume(&ret, 255);
! 246:
! 247: sfr_send_volume(iot, ioh,
! 248: pt2254a_compose_register(v, v, USE_CHANNEL, USE_CHANNEL));
! 249:
! 250: return ret;
! 251: }
! 252:
! 253: void
! 254: sfr_send_volume(bus_space_tag_t iot, bus_space_handle_t ioh, u_int32_t vol) {
! 255: u_int8_t one, zero;
! 256: int i;
! 257:
! 258: one = zero = SF16FMR_FREQ_STEADY;
! 259: one = zero |= SF16FMR_VOLU_STROBE_OFF;
! 260:
! 261: one |= SF16FMR_VOLU_DATA_ON;
! 262: zero |= SF16FMR_VOLU_DATA_OFF;
! 263:
! 264: bus_space_write_1(iot, ioh, 0, SF16FMR_VOLU_STROBE_OFF | SF16FMR_FREQ_STEADY);
! 265:
! 266: for (i = 0; i < PT2254A_REGISTER_LENGTH; i++) {
! 267: if (vol & (1 << i)) {
! 268: bus_space_write_1(iot, ioh, 0,
! 269: one | SF16FMR_VOLU_CLOCK_OFF);
! 270: bus_space_write_1(iot, ioh, 0,
! 271: one | SF16FMR_VOLU_CLOCK_ON);
! 272: } else {
! 273: bus_space_write_1(iot, ioh, 0,
! 274: zero | SF16FMR_VOLU_CLOCK_OFF);
! 275: bus_space_write_1(iot, ioh, 0,
! 276: zero | SF16FMR_VOLU_CLOCK_ON);
! 277: }
! 278: }
! 279:
! 280: /* Latch the data */
! 281: bus_space_write_1(iot, ioh, 0, SF16FMR_VOLU_STROBE_ON | SF16FMR_FREQ_STEADY);
! 282: bus_space_write_1(iot, ioh, 0, SF16FMR_VOLU_STROBE_OFF | SF16FMR_FREQ_STEADY);
! 283: }
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