/* $OpenBSD: ad1848.c,v 1.26 2002/06/14 21:34:59 todd Exp $ */ /* $NetBSD: ad1848.c,v 1.45 1998/01/30 02:02:38 augustss Exp $ */ /* * Copyright (c) 1994 John Brezak * Copyright (c) 1991-1993 Regents of the University of California. * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the Computer Systems * Engineering Group at Lawrence Berkeley Laboratory. * 4. Neither the name of the University nor of the Laboratory may be used * to endorse or promote products derived from this software without * specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. * */ /* * Copyright by Hannu Savolainen 1994 * * 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 AUTHOR AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS 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. * */ /* * Portions of this code are from the VOXware support for the ad1848 * by Hannu Savolainen * * Portions also supplied from the SoundBlaster driver for NetBSD. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef AUDIO_DEBUG #define DPRINTF(x) if (ad1848debug) printf x int ad1848debug = 0; #else #define DPRINTF(x) #endif /* * Initial values for the indirect registers of CS4248/AD1848. */ static int ad1848_init_values[] = { /* Left Input Control */ GAIN_12|INPUT_MIC_GAIN_ENABLE, /* Right Input Control */ GAIN_12|INPUT_MIC_GAIN_ENABLE, ATTEN_12, /* Left Aux #1 Input Control */ ATTEN_12, /* Right Aux #1 Input Control */ ATTEN_12, /* Left Aux #2 Input Control */ ATTEN_12, /* Right Aux #2 Input Control */ /* bits 5-0 are attenuation select */ ATTEN_12, /* Left DAC output Control */ ATTEN_12, /* Right DAC output Control */ /* Clock and Data Format */ CLOCK_XTAL1|FMT_PCM8, /* Interface Config */ SINGLE_DMA|AUTO_CAL_ENABLE, INTERRUPT_ENABLE, /* Pin control */ 0x00, /* Test and Init */ MODE2, /* Misc control */ ATTEN_0<<2, /* Digital Mix Control */ 0, /* Upper base Count */ 0, /* Lower base Count */ /* These are for CS4231 &c. only (additional registers): */ 0, /* Alt feature 1 */ 0, /* Alt feature 2 */ ATTEN_12, /* Left line in */ ATTEN_12, /* Right line in */ 0, /* Timer low */ 0, /* Timer high */ 0, /* unused */ 0, /* unused */ 0, /* IRQ status */ 0, /* unused */ /* Mono input (a.k.a speaker) (mic) Control */ MONO_INPUT_MUTE|ATTEN_6, /* mute speaker by default */ 0, /* unused */ 0, /* record format */ 0, /* Crystal Clock Select */ 0, /* upper record count */ 0 /* lower record count */ }; void ad1848_reset(struct ad1848_softc *); int ad1848_set_speed(struct ad1848_softc *, u_long *); void ad1848_mute_monitor(void *, int); static int ad_read(struct ad1848_softc *, int); static void ad_write(struct ad1848_softc *, int, int); static void ad_set_MCE(struct ad1848_softc *, int); static void wait_for_calibration(struct ad1848_softc *); #define ADREAD(sc, addr) bus_space_read_1((sc)->sc_iot, (sc)->sc_ioh, (sc)->sc_iooffs+(addr)) #define ADWRITE(sc, addr, data) bus_space_write_1((sc)->sc_iot, (sc)->sc_ioh, (sc)->sc_iooffs+(addr), (data)) static int ad_read(sc, reg) struct ad1848_softc *sc; int reg; { int x, s; s = splaudio(); ADWRITE(sc, AD1848_IADDR, (reg & 0xff) | sc->MCE_bit); x = ADREAD(sc, AD1848_IDATA); splx(s); /* printf("(%02x<-%02x) ", reg|sc->MCE_bit, x); */ return x; } static void ad_write(sc, reg, data) struct ad1848_softc *sc; int reg; int data; { int s = splaudio(); ADWRITE(sc, AD1848_IADDR, (reg & 0xff) | sc->MCE_bit); ADWRITE(sc, AD1848_IDATA, data & 0xff); splx(s); /* printf("(%02x->%02x) ", reg|sc->MCE_bit, data); */ } static void ad_set_MCE(sc, state) struct ad1848_softc *sc; int state; { if (state) sc->MCE_bit = MODE_CHANGE_ENABLE; else sc->MCE_bit = 0; ADWRITE(sc, AD1848_IADDR, sc->MCE_bit); } static void wait_for_calibration(sc) struct ad1848_softc *sc; { int timeout; DPRINTF(("ad1848: Auto calibration started.\n")); /* * Wait until the auto calibration process has finished. * * 1) Wait until the chip becomes ready (reads don't return 0x80). * 2) Wait until the ACI bit of I11 gets on and then off. */ timeout = 100000; while (timeout > 0 && ADREAD(sc, AD1848_IADDR) == SP_IN_INIT) timeout--; if (ADREAD(sc, AD1848_IADDR) == SP_IN_INIT) DPRINTF(("ad1848: Auto calibration timed out(1).\n")); ADWRITE(sc, AD1848_IADDR, SP_TEST_AND_INIT); timeout = 100000; while (timeout > 0 && ADREAD(sc, AD1848_IADDR) != SP_TEST_AND_INIT) timeout--; if (ADREAD(sc, AD1848_IADDR) == SP_TEST_AND_INIT) DPRINTF(("ad1848: Auto calibration timed out(1.5).\n")); if (!(ad_read(sc, SP_TEST_AND_INIT) & AUTO_CAL_IN_PROG)) { timeout = 100000; while (timeout > 0 && !(ad_read(sc, SP_TEST_AND_INIT) & AUTO_CAL_IN_PROG)) timeout--; if (!(ad_read(sc, SP_TEST_AND_INIT) & AUTO_CAL_IN_PROG)) DPRINTF(("ad1848: Auto calibration timed out(2).\n")); } timeout = 100000; while (timeout > 0 && ad_read(sc, SP_TEST_AND_INIT) & AUTO_CAL_IN_PROG) timeout--; if (ad_read(sc, SP_TEST_AND_INIT) & AUTO_CAL_IN_PROG) DPRINTF(("ad1848: Auto calibration timed out(3).\n")); } #ifdef AUDIO_DEBUG void ad1848_dump_regs(struct ad1848_softc *); void ad1848_dump_regs(sc) struct ad1848_softc *sc; { int i; u_char r; printf("ad1848 status=%02x", ADREAD(sc, AD1848_STATUS)); printf(" regs: "); for (i = 0; i < 16; i++) { r = ad_read(sc, i); printf("%02x ", r); } if (sc->mode == 2) { for (i = 16; i < 32; i++) { r = ad_read(sc, i); printf("%02x ", r); } } printf("\n"); } #endif /* * Map and probe for the ad1848 chip */ int ad1848_mapprobe(sc, iobase) struct ad1848_softc *sc; int iobase; { if (!AD1848_BASE_VALID(iobase)) { #ifdef AUDIO_DEBUG printf("ad1848: configured iobase %04x invalid\n", iobase); #endif return 0; } sc->sc_iooffs = 0; /* Map the AD1848 ports */ if (bus_space_map(sc->sc_iot, iobase, AD1848_NPORT, 0, &sc->sc_ioh)) return 0; if (!ad1848_probe(sc)) { bus_space_unmap(sc->sc_iot, sc->sc_ioh, AD1848_NPORT); return 0; } else return 1; } /* * Probe for the ad1848 chip */ int ad1848_probe(sc) struct ad1848_softc *sc; { u_char tmp, tmp1 = 0xff, tmp2 = 0xff; #if 0 int i; #endif /* Is there an ad1848 chip ? */ sc->MCE_bit = MODE_CHANGE_ENABLE; sc->mode = 1; /* MODE 1 = original ad1848/ad1846/cs4248 */ /* * Check that the I/O address is in use. * * The SP_IN_INIT bit of the base I/O port is known to be 0 after the * chip has performed its power-on initialization. Just assume * this has happened before the OS is starting. * * If the I/O address is unused, inb() typically returns 0xff. */ tmp = ADREAD(sc, AD1848_IADDR); if (tmp & SP_IN_INIT) { /* Not a AD1848 */ #if 0 DPRINTF(("ad_detect_A %x\n", tmp)); #endif goto bad; } /* * Test if it's possible to change contents of the indirect registers. * Registers 0 and 1 are ADC volume registers. The bit 0x10 is read only * so try to avoid using it. */ ad_write(sc, 0, 0xaa); ad_write(sc, 1, 0x45); /* 0x55 with bit 0x10 clear */ if ((tmp1 = ad_read(sc, 0)) != 0xaa || (tmp2 = ad_read(sc, 1)) != 0x45) { DPRINTF(("ad_detect_B (%x/%x)\n", tmp1, tmp2)); goto bad; } ad_write(sc, 0, 0x45); ad_write(sc, 1, 0xaa); if ((tmp1 = ad_read(sc, 0)) != 0x45 || (tmp2 = ad_read(sc, 1)) != 0xaa) { DPRINTF(("ad_detect_C (%x/%x)\n", tmp1, tmp2)); goto bad; } /* * The indirect register I12 has some read only bits. Lets * try to change them. */ tmp = ad_read(sc, SP_MISC_INFO); ad_write(sc, SP_MISC_INFO, (~tmp) & 0x0f); if ((tmp & 0x0f) != ((tmp1 = ad_read(sc, SP_MISC_INFO)) & 0x0f)) { DPRINTF(("ad_detect_D (%x)\n", tmp1)); goto bad; } /* * MSB and 4 LSBs of the reg I12 tell the chip revision. * * A preliminary version of the AD1846 data sheet stated that it * used an ID field of 0x0B. The current version, however, * states that the AD1846 uses ID 0x0A, just like the AD1848K. * * this switch statement will need updating as newer clones arrive.... */ switch (tmp1 & 0x8f) { case 0x09: sc->chip_name = "AD1848J"; break; case 0x0A: sc->chip_name = "AD1848K"; break; #if 0 /* See above */ case 0x0B: sc->chip_name = "AD1846"; break; #endif case 0x81: sc->chip_name = "CS4248revB"; /* or CS4231 rev B; see below */ break; case 0x89: sc->chip_name = "CS4248"; break; case 0x8A: sc->chip_name = "broken"; /* CS4231/AD1845; see below */ break; default: sc->chip_name = "unknown"; DPRINTF(("ad1848: unknown codec version %#02X\n", (tmp1 & 0x8f))); } #if 0 /* * XXX I don't know why, but this probe fails on an otherwise well-working * AW35/pro card, so I'll just take it out for now. [niklas@openbsd.org] */ /* * The original AD1848/CS4248 has just 16 indirect registers. This means * that I0 and I16 should return the same value (etc.). * Ensure that the Mode2 enable bit of I12 is 0. Otherwise this test fails * with CS4231, AD1845, etc. */ ad_write(sc, SP_MISC_INFO, 0); /* Mode2 = disabled */ for (i = 0; i < 16; i++) if ((tmp1 = ad_read(sc, i)) != (tmp2 = ad_read(sc, i + 16))) { if (i != SP_TEST_AND_INIT) { DPRINTF(("ad_detect_F(%d/%x/%x)\n", i, tmp1, tmp2)); goto bad; } } #endif /* * Try to switch the chip to mode2 (CS4231) by setting the MODE2 bit * The bit 0x80 is always 1 in CS4248, CS4231, and AD1845. */ ad_write(sc, SP_MISC_INFO, MODE2); /* Set mode2, clear 0x80 */ tmp1 = ad_read(sc, SP_MISC_INFO); if ((tmp1 & 0xc0) == (0x80 | MODE2)) { /* * CS4231 or AD1845 detected - is it? * * Verify that setting I2 doesn't change I18. */ ad_write(sc, 18, 0x88); /* Set I18 to known value */ ad_write(sc, 2, 0x45); if ((tmp2 = ad_read(sc, 18)) != 0x45) { /* No change -> CS4231? */ ad_write(sc, 2, 0xaa); if ((tmp2 = ad_read(sc, 18)) == 0xaa) { /* Rotten bits? */ DPRINTF(("ad_detect_H(%x)\n", tmp2)); goto bad; } /* * It's a CS4231, or another clone with 32 registers. * Let's find out which by checking I25. */ if ((tmp1 & 0x8f) == 0x8a) { tmp1 = ad_read(sc, CS_VERSION_ID); switch (tmp1 & 0xe7) { case 0xA0: sc->chip_name = "CS4231A"; break; case 0x80: /* XXX I25 no good, AD1845 same as CS4231 */ sc->chip_name = "CS4231 or AD1845"; break; case 0x82: case 0xa2: sc->chip_name = "CS4232"; break; case 0x03: sc->chip_name = "CS4236/CS4236B"; break; } } sc->mode = 2; } } /* Wait for 1848 to init */ while(ADREAD(sc, AD1848_IADDR) & SP_IN_INIT) ; /* Wait for 1848 to autocal */ ADWRITE(sc, AD1848_IADDR, SP_TEST_AND_INIT); while(ADREAD(sc, AD1848_IDATA) & AUTO_CAL_IN_PROG) ; return 1; bad: return 0; } /* Unmap the I/O ports */ void ad1848_unmap(sc) struct ad1848_softc *sc; { bus_space_unmap(sc->sc_iot, sc->sc_ioh, AD1848_NPORT); } /* * Attach hardware to driver, attach hardware driver to audio * pseudo-device driver . */ void ad1848_attach(sc) struct ad1848_softc *sc; { int i; struct ad1848_volume vol_mid = {220, 220}; struct ad1848_volume vol_0 = {0, 0}; struct audio_params pparams, rparams; int timeout; sc->sc_locked = 0; sc->sc_playrun = NOTRUNNING; sc->sc_recrun = NOTRUNNING; if (sc->sc_drq != -1) { if (isa_dmamap_create(sc->sc_isa, sc->sc_drq, MAX_ISADMA, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) { printf("ad1848_attach: can't create map for drq %d\n", sc->sc_drq); return; } } if (sc->sc_recdrq != -1 && sc->sc_recdrq != sc->sc_drq) { if (isa_dmamap_create(sc->sc_isa, sc->sc_recdrq, MAX_ISADMA, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) { printf("ad1848_attach: can't creape map for drq %d\n", sc->sc_recdrq); return; } } /* Initialize the ad1848... */ for (i = 0; i < 0x10; i++) { ad_write(sc, i, ad1848_init_values[i]); timeout = 100000; while (timeout > 0 && ad_read(sc, AD1848_IADDR) & SP_IN_INIT) timeout--; } /* ...and additional CS4231 stuff too */ if (sc->mode == 2) { ad_write(sc, SP_INTERFACE_CONFIG, 0); /* disable SINGLE_DMA */ for (i = 0x10; i < 0x20; i++) if (ad1848_init_values[i] != 0) { ad_write(sc, i, ad1848_init_values[i]); timeout = 100000; while (timeout > 0 && ad_read(sc, AD1848_IADDR) & SP_IN_INIT) timeout--; } } ad1848_reset(sc); pparams = audio_default; rparams = audio_default; (void) ad1848_set_params(sc, AUMODE_RECORD|AUMODE_PLAY, 0, &pparams, &rparams); /* Set default gains */ (void) ad1848_set_rec_gain(sc, &vol_mid); (void) ad1848_set_channel_gain(sc, AD1848_DAC_CHANNEL, &vol_mid); (void) ad1848_set_channel_gain(sc, AD1848_MONITOR_CHANNEL, &vol_0); (void) ad1848_set_channel_gain(sc, AD1848_AUX1_CHANNEL, &vol_mid); /* CD volume */ if (sc->mode == 2) { (void) ad1848_set_channel_gain(sc, AD1848_AUX2_CHANNEL, &vol_mid); /* CD volume */ (void) ad1848_set_channel_gain(sc, AD1848_LINE_CHANNEL, &vol_mid); (void) ad1848_set_channel_gain(sc, AD1848_MONO_CHANNEL, &vol_0); sc->mute[AD1848_MONO_CHANNEL] = MUTE_ALL; } else (void) ad1848_set_channel_gain(sc, AD1848_AUX2_CHANNEL, &vol_0); /* Set default port */ (void) ad1848_set_rec_port(sc, MIC_IN_PORT); if (sc->chip_name) printf(": %s", sc->chip_name); #undef WAITREADY } /* * Various routines to interface to higher level audio driver */ struct ad1848_mixerinfo { int left_reg; int right_reg; int atten_bits; int atten_mask; } mixer_channel_info[] = { { SP_LEFT_AUX2_CONTROL, SP_RIGHT_AUX2_CONTROL, AUX_INPUT_ATTEN_BITS, AUX_INPUT_ATTEN_MASK }, { SP_LEFT_AUX1_CONTROL, SP_RIGHT_AUX1_CONTROL, AUX_INPUT_ATTEN_BITS, AUX_INPUT_ATTEN_MASK }, { SP_LEFT_OUTPUT_CONTROL, SP_RIGHT_OUTPUT_CONTROL, OUTPUT_ATTEN_BITS, OUTPUT_ATTEN_MASK }, { CS_LEFT_LINE_CONTROL, CS_RIGHT_LINE_CONTROL, LINE_INPUT_ATTEN_BITS, LINE_INPUT_ATTEN_MASK }, { CS_MONO_IO_CONTROL, 0, MONO_INPUT_ATTEN_BITS, MONO_INPUT_ATTEN_MASK }, { SP_DIGITAL_MIX, 0, OUTPUT_ATTEN_BITS, MIX_ATTEN_MASK } }; /* * This function doesn't set the mute flags but does use them. * The mute flags reflect the mutes that have been applied by the user. * However, the driver occasionally wants to mute devices (e.g. when chaing * sampling rate). These operations should not affect the mute flags. */ void ad1848_mute_channel(sc, device, mute) struct ad1848_softc *sc; int device; int mute; { u_char reg; reg = ad_read(sc, mixer_channel_info[device].left_reg); if (mute & MUTE_LEFT) { if (device == AD1848_MONITOR_CHANNEL) ad_write(sc, mixer_channel_info[device].left_reg, reg & 0xFE); else ad_write(sc, mixer_channel_info[device].left_reg, reg | 0x80); } else if (!(sc->mute[device] & MUTE_LEFT)) { if (device == AD1848_MONITOR_CHANNEL) ad_write(sc, mixer_channel_info[device].left_reg, reg | 0x01); else ad_write(sc, mixer_channel_info[device].left_reg, reg & ~0x80); } if (!mixer_channel_info[device].right_reg) { return; } reg = ad_read(sc, mixer_channel_info[device].right_reg); if (mute & MUTE_RIGHT) ad_write(sc, mixer_channel_info[device].right_reg, reg | 0x80); else if (!(sc->mute[device] & MUTE_RIGHT)) { ad_write(sc, mixer_channel_info[device].right_reg, reg & ~0x80); } } int ad1848_set_channel_gain(sc, device, gp) struct ad1848_softc *sc; int device; struct ad1848_volume *gp; { struct ad1848_mixerinfo *info = &mixer_channel_info[device]; u_char reg; u_int atten; sc->gains[device] = *gp; atten = ((AUDIO_MAX_GAIN - gp->left) * info->atten_bits)/AUDIO_MAX_GAIN; reg = ad_read(sc, info->left_reg) & (info->atten_mask); if (device == AD1848_MONITOR_CHANNEL) reg |= ((atten & info->atten_bits) << 2); else reg |= ((atten & info->atten_bits)); ad_write(sc, info->left_reg, reg); if (!info->right_reg) return (0); atten = ((AUDIO_MAX_GAIN - gp->right) * info->atten_bits)/AUDIO_MAX_GAIN; reg = ad_read(sc, info->right_reg); reg &= (info->atten_mask); ad_write(sc, info->right_reg, (atten& info->atten_bits)|reg); return(0); } int ad1848_get_device_gain(sc, device, gp) struct ad1848_softc *sc; int device; struct ad1848_volume *gp; { *gp = sc->gains[device]; return(0); } int ad1848_get_rec_gain(sc, gp) struct ad1848_softc *sc; struct ad1848_volume *gp; { *gp = sc->rec_gain; return(0); } int ad1848_set_rec_gain(sc, gp) struct ad1848_softc *sc; struct ad1848_volume *gp; { u_char reg, gain; DPRINTF(("ad1848_set_rec_gain: %d:%d\n", gp->left, gp->right)); sc->rec_gain = *gp; gain = (gp->left * GAIN_22_5)/AUDIO_MAX_GAIN; reg = ad_read(sc, SP_LEFT_INPUT_CONTROL); reg &= INPUT_GAIN_MASK; ad_write(sc, SP_LEFT_INPUT_CONTROL, (gain&0x0f)|reg); gain = (gp->right * GAIN_22_5)/AUDIO_MAX_GAIN; reg = ad_read(sc, SP_RIGHT_INPUT_CONTROL); reg &= INPUT_GAIN_MASK; ad_write(sc, SP_RIGHT_INPUT_CONTROL, (gain&0x0f)|reg); return(0); } void ad1848_mute_monitor(addr, mute) void *addr; int mute; { struct ad1848_softc *sc = addr; DPRINTF(("ad1848_mute_monitor: %smuting\n", mute ? "" : "un")); if (sc->mode == 2) { ad1848_mute_channel(sc, AD1848_DAC_CHANNEL, mute ? MUTE_ALL : 0); ad1848_mute_channel(sc, AD1848_MONO_CHANNEL, mute ? MUTE_MONO : 0); ad1848_mute_channel(sc, AD1848_LINE_CHANNEL, mute ? MUTE_ALL : 0); } ad1848_mute_channel(sc, AD1848_AUX2_CHANNEL, mute ? MUTE_ALL : 0); ad1848_mute_channel(sc, AD1848_AUX1_CHANNEL, mute ? MUTE_ALL : 0); } int ad1848_set_mic_gain(sc, gp) struct ad1848_softc *sc; struct ad1848_volume *gp; { u_char reg; DPRINTF(("cs4231_set_mic_gain: %d\n", gp->left)); if (gp->left > AUDIO_MAX_GAIN/2) { sc->mic_gain_on = 1; reg = ad_read(sc, SP_LEFT_INPUT_CONTROL); ad_write(sc, SP_LEFT_INPUT_CONTROL, reg | INPUT_MIC_GAIN_ENABLE); } else { sc->mic_gain_on = 0; reg = ad_read(sc, SP_LEFT_INPUT_CONTROL); ad_write(sc, SP_LEFT_INPUT_CONTROL, reg & ~INPUT_MIC_GAIN_ENABLE); } return(0); } int ad1848_get_mic_gain(sc, gp) struct ad1848_softc *sc; struct ad1848_volume *gp; { if (sc->mic_gain_on) gp->left = gp->right = AUDIO_MAX_GAIN; else gp->left = gp->right = AUDIO_MIN_GAIN; return(0); } static ad1848_devmap_t *ad1848_mixer_find_dev(ad1848_devmap_t *, int, mixer_ctrl_t *); static ad1848_devmap_t * ad1848_mixer_find_dev(map, cnt, cp) ad1848_devmap_t *map; int cnt; mixer_ctrl_t *cp; { int idx; for (idx = 0; idx < cnt; idx++) { if (map[idx].id == cp->dev) { return (&map[idx]); } } return (NULL); } int ad1848_mixer_get_port(ac, map, cnt, cp) struct ad1848_softc *ac; struct ad1848_devmap *map; int cnt; mixer_ctrl_t *cp; { ad1848_devmap_t *entry; struct ad1848_volume vol; int error = EINVAL; int dev; if (!(entry = ad1848_mixer_find_dev(map, cnt, cp))) return (ENXIO); dev = entry->dev; switch (entry->kind) { case AD1848_KIND_LVL: if (cp->type != AUDIO_MIXER_VALUE) break; if (dev < AD1848_AUX2_CHANNEL || dev > AD1848_MONITOR_CHANNEL) break; if (cp->un.value.num_channels != 1 && mixer_channel_info[dev].right_reg == 0) break; error = ad1848_get_device_gain(ac, dev, &vol); if (!error) ad1848_from_vol(cp, &vol); break; case AD1848_KIND_MUTE: if (cp->type != AUDIO_MIXER_ENUM) break; cp->un.ord = ac->mute[dev] ? 1 : 0; error = 0; break; case AD1848_KIND_RECORDGAIN: if (cp->type != AUDIO_MIXER_VALUE) break; error = ad1848_get_rec_gain(ac, &vol); if (!error) ad1848_from_vol(cp, &vol); break; case AD1848_KIND_MICGAIN: if (cp->type != AUDIO_MIXER_VALUE) break; error = ad1848_get_mic_gain(ac, &vol); if (!error) ad1848_from_vol(cp, &vol); break; case AD1848_KIND_RECORDSOURCE: if (cp->type != AUDIO_MIXER_ENUM) break; cp->un.ord = ad1848_get_rec_port(ac); error = 0; break; default: printf ("Invalid kind\n"); break; } return (error); } int ad1848_mixer_set_port(ac, map, cnt, cp) struct ad1848_softc *ac; struct ad1848_devmap *map; int cnt; mixer_ctrl_t *cp; { ad1848_devmap_t *entry; struct ad1848_volume vol; int error = EINVAL; int dev; if (!(entry = ad1848_mixer_find_dev(map, cnt, cp))) return (ENXIO); dev = entry->dev; switch (entry->kind) { case AD1848_KIND_LVL: if (cp->type != AUDIO_MIXER_VALUE) break; if (dev < AD1848_AUX2_CHANNEL || dev > AD1848_MONITOR_CHANNEL) break; if (cp->un.value.num_channels != 1 && mixer_channel_info[dev].right_reg == 0) break; ad1848_to_vol(cp, &vol); error = ad1848_set_channel_gain(ac, dev, &vol); break; case AD1848_KIND_MUTE: if (cp->type != AUDIO_MIXER_ENUM) break; ac->mute[dev] = (cp->un.ord ? MUTE_ALL : 0); ad1848_mute_channel(ac, dev, ac->mute[dev]); error = 0; break; case AD1848_KIND_RECORDGAIN: if (cp->type != AUDIO_MIXER_VALUE) break; ad1848_to_vol(cp, &vol); error = ad1848_set_rec_gain(ac, &vol); break; case AD1848_KIND_MICGAIN: if (cp->type != AUDIO_MIXER_VALUE) break; ad1848_to_vol(cp, &vol); error = ad1848_set_mic_gain(ac, &vol); break; case AD1848_KIND_RECORDSOURCE: if (cp->type != AUDIO_MIXER_ENUM) break; error = ad1848_set_rec_port(ac, cp->un.ord); break; default: printf ("Invalid kind\n"); break; } return (error); } int ad1848_query_encoding(addr, fp) void *addr; struct audio_encoding *fp; { struct ad1848_softc *sc = addr; switch (fp->index) { case 0: strcpy(fp->name, AudioEmulaw); fp->encoding = AUDIO_ENCODING_ULAW; fp->precision = 8; fp->flags = 0; break; case 1: strcpy(fp->name, AudioEalaw); fp->encoding = AUDIO_ENCODING_ALAW; fp->precision = 8; fp->flags = 0; break; case 2: strcpy(fp->name, AudioEslinear_le); fp->encoding = AUDIO_ENCODING_SLINEAR_LE; fp->precision = 16; fp->flags = 0; break; case 3: strcpy(fp->name, AudioEulinear); fp->encoding = AUDIO_ENCODING_ULINEAR; fp->precision = 8; fp->flags = 0; break; case 4: /* only on CS4231 */ strcpy(fp->name, AudioEslinear_be); fp->encoding = AUDIO_ENCODING_SLINEAR_BE; fp->precision = 16; fp->flags = sc->mode == 1 ? AUDIO_ENCODINGFLAG_EMULATED : 0; break; /* emulate some modes */ case 5: strcpy(fp->name, AudioEslinear); fp->encoding = AUDIO_ENCODING_SLINEAR; fp->precision = 8; fp->flags = AUDIO_ENCODINGFLAG_EMULATED; break; case 6: strcpy(fp->name, AudioEulinear_le); fp->encoding = AUDIO_ENCODING_ULINEAR_LE; fp->precision = 16; fp->flags = AUDIO_ENCODINGFLAG_EMULATED; break; case 7: strcpy(fp->name, AudioEulinear_be); fp->encoding = AUDIO_ENCODING_ULINEAR_BE; fp->precision = 16; fp->flags = AUDIO_ENCODINGFLAG_EMULATED; break; case 8: /* only on CS4231 */ if (sc->mode == 1) return EINVAL; strcpy(fp->name, AudioEadpcm); fp->encoding = AUDIO_ENCODING_ADPCM; fp->precision = 8; fp->flags = 0; break; default: return EINVAL; /*NOTREACHED*/ } return (0); } int ad1848_set_params(addr, setmode, usemode, p, r) void *addr; int setmode, usemode; struct audio_params *p, *r; { struct ad1848_softc *sc = addr; int error, bits, enc; void (*pswcode)(void *, u_char *buf, int cnt); void (*rswcode)(void *, u_char *buf, int cnt); DPRINTF(("ad1848_set_params: %d %d %d %ld\n", p->encoding, p->precision, p->channels, p->sample_rate)); enc = p->encoding; pswcode = rswcode = 0; switch (enc) { case AUDIO_ENCODING_SLINEAR_LE: if (p->precision == 8) { enc = AUDIO_ENCODING_ULINEAR_LE; pswcode = rswcode = change_sign8; } break; case AUDIO_ENCODING_SLINEAR_BE: if (p->precision == 16 && sc->mode == 1) { enc = AUDIO_ENCODING_SLINEAR_LE; pswcode = rswcode = swap_bytes; } break; case AUDIO_ENCODING_ULINEAR_LE: if (p->precision == 16) { enc = AUDIO_ENCODING_SLINEAR_LE; pswcode = rswcode = change_sign16; } break; case AUDIO_ENCODING_ULINEAR_BE: if (p->precision == 16) { enc = AUDIO_ENCODING_SLINEAR_LE; pswcode = swap_bytes_change_sign16; rswcode = change_sign16_swap_bytes; } break; } switch (enc) { case AUDIO_ENCODING_ULAW: bits = FMT_ULAW >> 5; break; case AUDIO_ENCODING_ALAW: bits = FMT_ALAW >> 5; break; case AUDIO_ENCODING_ADPCM: bits = FMT_ADPCM >> 5; break; case AUDIO_ENCODING_SLINEAR_LE: if (p->precision == 16) bits = FMT_TWOS_COMP >> 5; else return EINVAL; break; case AUDIO_ENCODING_SLINEAR_BE: if (p->precision == 16) bits = FMT_TWOS_COMP_BE >> 5; else return EINVAL; break; case AUDIO_ENCODING_ULINEAR_LE: if (p->precision == 8) bits = FMT_PCM8 >> 5; else return EINVAL; break; default: return EINVAL; } if (p->channels < 1 || p->channels > 2) return EINVAL; error = ad1848_set_speed(sc, &p->sample_rate); if (error) return error; p->sw_code = pswcode; r->sw_code = rswcode; sc->format_bits = bits; sc->channels = p->channels; sc->precision = p->precision; sc->need_commit = 1; DPRINTF(("ad1848_set_params succeeded, bits=%x\n", bits)); return (0); } int ad1848_set_rec_port(sc, port) struct ad1848_softc *sc; int port; { u_char inp, reg; DPRINTF(("ad1848_set_rec_port: 0x%x\n", port)); if (port == MIC_IN_PORT) { inp = MIC_INPUT; } else if (port == LINE_IN_PORT) { inp = LINE_INPUT; } else if (port == DAC_IN_PORT) { inp = MIXED_DAC_INPUT; } else if (sc->mode == 2 && port == AUX1_IN_PORT) { inp = AUX_INPUT; } else return(EINVAL); reg = ad_read(sc, SP_LEFT_INPUT_CONTROL); reg &= INPUT_SOURCE_MASK; ad_write(sc, SP_LEFT_INPUT_CONTROL, (inp|reg)); reg = ad_read(sc, SP_RIGHT_INPUT_CONTROL); reg &= INPUT_SOURCE_MASK; ad_write(sc, SP_RIGHT_INPUT_CONTROL, (inp|reg)); sc->rec_port = port; return(0); } int ad1848_get_rec_port(sc) struct ad1848_softc *sc; { return(sc->rec_port); } int ad1848_round_blocksize(addr, blk) void *addr; int blk; { struct ad1848_softc *sc = addr; sc->sc_lastcc = -1; /* Round to a multiple of the biggest sample size. */ blk &= -4; return (blk); } int ad1848_open(addr, flags) void *addr; int flags; { struct ad1848_softc *sc = addr; DPRINTF(("ad1848_open: sc=%p\n", sc)); sc->sc_intr = 0; sc->sc_lastcc = -1; sc->sc_locked = 0; /* Enable interrupts */ DPRINTF(("ad1848_open: enable intrs\n")); ad_write(sc, SP_PIN_CONTROL, INTERRUPT_ENABLE|ad_read(sc, SP_PIN_CONTROL)); #ifdef AUDIO_DEBUG if (ad1848debug) ad1848_dump_regs(sc); #endif return 0; } /* * Close function is called at splaudio(). */ void ad1848_close(addr) void *addr; { struct ad1848_softc *sc = addr; u_char r; sc->sc_intr = 0; DPRINTF(("ad1848_close: stop DMA\n")); if (sc->sc_playrun != NOTRUNNING) { isa_dmaabort(sc->sc_isa, sc->sc_drq); sc->sc_playrun = NOTRUNNING; } if (sc->sc_recrun != NOTRUNNING) { isa_dmaabort(sc->sc_isa, sc->sc_recdrq); sc->sc_recrun = NOTRUNNING; } ad_write(sc, SP_LOWER_BASE_COUNT, (u_char)0); ad_write(sc, SP_UPPER_BASE_COUNT, (u_char)0); /* Disable interrupts */ DPRINTF(("ad1848_close: disable intrs\n")); ad_write(sc, SP_PIN_CONTROL, ad_read(sc, SP_PIN_CONTROL) & ~INTERRUPT_ENABLE); DPRINTF(("ad1848_close: disable capture and playback\n")); r = ad_read(sc, SP_INTERFACE_CONFIG); r &= ~(CAPTURE_ENABLE|PLAYBACK_ENABLE); ad_write(sc, SP_INTERFACE_CONFIG, r); #ifdef AUDIO_DEBUG if (ad1848debug) ad1848_dump_regs(sc); #endif } /* * Lower-level routines */ int ad1848_commit_settings(addr) void *addr; { struct ad1848_softc *sc = addr; int timeout; u_char fs; int s; if (!sc->need_commit) return 0; s = splaudio(); ad1848_mute_monitor(sc, 1); ad_set_MCE(sc, 1); /* Enables changes to the format select reg */ fs = sc->speed_bits | (sc->format_bits << 5); if (sc->channels == 2) fs |= FMT_STEREO; ad_write(sc, SP_CLOCK_DATA_FORMAT, fs); /* * If mode == 2 (CS4231), set I28 also. It's the capture format register. */ if (sc->mode == 2) { /* Gravis Ultrasound MAX SDK sources says something about errata * sheets, with the implication that these inb()s are necessary. */ (void)ADREAD(sc, AD1848_IDATA); (void)ADREAD(sc, AD1848_IDATA); /* * Write to I8 starts resynchronization. Wait until it completes. */ timeout = 100000; while (timeout > 0 && ADREAD(sc, AD1848_IADDR) == SP_IN_INIT) timeout--; ad_write(sc, CS_REC_FORMAT, fs); /* Gravis Ultrasound MAX SDK sources says something about errata * sheets, with the implication that these inb()s are necessary. */ (void)ADREAD(sc, AD1848_IDATA); (void)ADREAD(sc, AD1848_IDATA); /* Now wait for resync for capture side of the house */ } /* * Write to I8 starts resynchronization. Wait until it completes. */ timeout = 100000; while (timeout > 0 && ADREAD(sc, AD1848_IADDR) == SP_IN_INIT) timeout--; if (ADREAD(sc, AD1848_IADDR) == SP_IN_INIT) printf("ad1848_commit: Auto calibration timed out\n"); /* * Starts the calibration process and * enters playback mode after it. */ ad_set_MCE(sc, 0); wait_for_calibration(sc); ad1848_mute_monitor(sc, 0); sc->sc_lastcc = -1; splx(s); sc->need_commit = 0; return 0; } void ad1848_reset(sc) struct ad1848_softc *sc; { u_char r; DPRINTF(("ad1848_reset\n")); /* Clear the PEN and CEN bits */ r = ad_read(sc, SP_INTERFACE_CONFIG); r &= ~(CAPTURE_ENABLE|PLAYBACK_ENABLE); ad_write(sc, SP_INTERFACE_CONFIG, r); if (sc->mode == 2) { ADWRITE(sc, AD1848_IADDR, CS_IRQ_STATUS); ADWRITE(sc, AD1848_IDATA, 0); } /* Clear interrupt status */ ADWRITE(sc, AD1848_STATUS, 0); #ifdef AUDIO_DEBUG if (ad1848debug) ad1848_dump_regs(sc); #endif } int ad1848_set_speed(sc, argp) struct ad1848_softc *sc; u_long *argp; { /* * The sampling speed is encoded in the least significant nible of I8. The * LSB selects the clock source (0=24.576 MHz, 1=16.9344 Mhz) and other * three bits select the divisor (indirectly): * * The available speeds are in the following table. Keep the speeds in * the increasing order. */ typedef struct { int speed; u_char bits; } speed_struct; u_long arg = *argp; static speed_struct speed_table[] = { {5510, (0 << 1) | 1}, {5510, (0 << 1) | 1}, {6620, (7 << 1) | 1}, {8000, (0 << 1) | 0}, {9600, (7 << 1) | 0}, {11025, (1 << 1) | 1}, {16000, (1 << 1) | 0}, {18900, (2 << 1) | 1}, {22050, (3 << 1) | 1}, {27420, (2 << 1) | 0}, {32000, (3 << 1) | 0}, {33075, (6 << 1) | 1}, {37800, (4 << 1) | 1}, {44100, (5 << 1) | 1}, {48000, (6 << 1) | 0} }; int i, n, selected = -1; n = sizeof(speed_table) / sizeof(speed_struct); if (arg < speed_table[0].speed) selected = 0; if (arg > speed_table[n - 1].speed) selected = n - 1; for (i = 1 /*really*/ ; selected == -1 && i < n; i++) if (speed_table[i].speed == arg) selected = i; else if (speed_table[i].speed > arg) { int diff1, diff2; diff1 = arg - speed_table[i - 1].speed; diff2 = speed_table[i].speed - arg; if (diff1 < diff2) selected = i - 1; else selected = i; } if (selected == -1) { printf("ad1848: Can't find speed???\n"); selected = 3; } sc->speed_bits = speed_table[selected].bits; sc->need_commit = 1; *argp = speed_table[selected].speed; return (0); } /* * Halt a DMA in progress. */ int ad1848_halt_out_dma(addr) void *addr; { struct ad1848_softc *sc = addr; u_char reg; DPRINTF(("ad1848: ad1848_halt_out_dma\n")); reg = ad_read(sc, SP_INTERFACE_CONFIG); ad_write(sc, SP_INTERFACE_CONFIG, (reg & ~PLAYBACK_ENABLE)); sc->sc_locked = 0; return(0); } int ad1848_halt_in_dma(addr) void *addr; { struct ad1848_softc *sc = addr; u_char reg; DPRINTF(("ad1848: ad1848_halt_in_dma\n")); reg = ad_read(sc, SP_INTERFACE_CONFIG); ad_write(sc, SP_INTERFACE_CONFIG, (reg & ~CAPTURE_ENABLE)); sc->sc_locked = 0; return(0); } int ad1848_dma_init_input(addr, buf, cc) void *addr; void *buf; int cc; { struct ad1848_softc *sc = addr; sc->sc_recrun = DMARUNNING; sc->sc_dma_flags = DMAMODE_READ | DMAMODE_LOOP; sc->sc_dma_bp = buf; sc->sc_dma_cnt = cc; isa_dmastart(sc->sc_isa, sc->sc_recdrq, buf, cc, NULL, sc->sc_dma_flags, BUS_DMA_NOWAIT); DPRINTF(("ad1848_dma_init_input: %p %d\n", buf, cc)); return 0; } /* * DMA input/output are called at splaudio(). */ int ad1848_dma_input(addr, p, cc, intr, arg) void *addr; void *p; int cc; void (*intr)(void *); void *arg; { struct ad1848_softc *sc = addr; u_char reg; if (sc->sc_locked) { DPRINTF(("ad1848_dma_input: locked\n")); return 0; } #ifdef AUDIO_DEBUG if (ad1848debug > 1) printf("ad1848_dma_input: cc=%d %p (%p)\n", cc, intr, arg); #endif sc->sc_locked = 1; sc->sc_intr = intr; sc->sc_arg = arg; switch (sc->sc_recrun) { case NOTRUNNING: sc->sc_dma_flags = DMAMODE_READ; sc->sc_dma_bp = p; sc->sc_dma_cnt = cc; isa_dmastart(sc->sc_isa, sc->sc_recdrq, p, cc, NULL, DMAMODE_READ, BUS_DMA_NOWAIT); goto startpcm; case DMARUNNING: sc->sc_recrun = PCMRUNNING; startpcm: if (sc->precision == 16) cc >>= 1; if (sc->channels == 2) cc >>= 1; cc--; if (sc->sc_lastcc != cc || sc->sc_mode != AUMODE_RECORD) { ad_write(sc, SP_LOWER_BASE_COUNT, (u_char)(cc & 0xff)); ad_write(sc, SP_UPPER_BASE_COUNT, (u_char)((cc >> 8) & 0xff)); if (sc->mode == 2) { ad_write(sc, CS_LOWER_REC_CNT, (u_char)(cc & 0xff)); ad_write(sc, CS_UPPER_REC_CNT, (u_char)((cc >> 8) & 0xff)); } reg = ad_read(sc, SP_INTERFACE_CONFIG); ad_write(sc, SP_INTERFACE_CONFIG, (CAPTURE_ENABLE|reg)); sc->sc_lastcc = cc; sc->sc_mode = AUMODE_RECORD; #ifdef AUDIO_DEBUG if (ad1848debug > 1) printf("ad1848_dma_input: started capture\n"); #endif } case PCMRUNNING: break; } return 0; } int ad1848_dma_init_output(addr, buf, cc) void *addr; void *buf; int cc; { struct ad1848_softc *sc = addr; sc->sc_playrun = DMARUNNING; sc->sc_dma_flags = DMAMODE_WRITE | DMAMODE_LOOP; sc->sc_dma_bp = buf; sc->sc_dma_cnt = cc; isa_dmastart(sc->sc_isa, sc->sc_drq, buf, cc, NULL, sc->sc_dma_flags, BUS_DMA_NOWAIT); DPRINTF(("ad1848_dma_init_output: %p %d\n", buf, cc)); return 0; } int ad1848_dma_output(addr, p, cc, intr, arg) void *addr; void *p; int cc; void (*intr)(void *); void *arg; { struct ad1848_softc *sc = addr; u_char reg; if (sc->sc_locked) { DPRINTF(("ad1848_dma_output: locked\n")); return 0; } #ifdef AUDIO_DEBUG if (ad1848debug > 0) printf("ad1848_dma_output: cc=%d at %p 0x%p (0x%p)\n", cc, p, intr, arg); #endif sc->sc_locked = 1; sc->sc_intr = intr; sc->sc_arg = arg; switch (sc->sc_playrun) { case NOTRUNNING: sc->sc_dma_flags = DMAMODE_WRITE; sc->sc_dma_bp = p; sc->sc_dma_cnt = cc; isa_dmastart(sc->sc_isa, sc->sc_drq, p, cc, NULL, DMAMODE_WRITE, BUS_DMA_NOWAIT); goto startpcm; case DMARUNNING: sc->sc_playrun = PCMRUNNING; startpcm: if (sc->precision == 16) cc >>= 1; if (sc->channels == 2) cc >>= 1; cc--; if (sc->sc_lastcc != cc || sc->sc_mode != AUMODE_PLAY) { ad_write(sc, SP_LOWER_BASE_COUNT, (u_char)(cc & 0xff)); ad_write(sc, SP_UPPER_BASE_COUNT, (u_char)((cc >> 8) & 0xff)); reg = ad_read(sc, SP_INTERFACE_CONFIG); ad_write(sc, SP_INTERFACE_CONFIG, (PLAYBACK_ENABLE|reg)); sc->sc_lastcc = cc; sc->sc_mode = AUMODE_PLAY; } break; case PCMRUNNING: break; } return 0; } int ad1848_intr(arg) void *arg; { struct ad1848_softc *sc = arg; int retval = 0; u_char status; /* Get intr status */ status = ADREAD(sc, AD1848_STATUS); #ifdef AUDIO_DEBUG if (ad1848debug > 1) printf("ad1848_intr: intr=%p status=%x\n", sc->sc_intr, status); #endif sc->sc_locked = 0; sc->sc_interrupts++; /* Handle interrupt */ if (sc->sc_intr && (status & INTERRUPT_STATUS)) { /* ACK DMA read because it may be in a bounce buffer */ /* XXX Do write to mask DMA ? */ if ((sc->sc_dma_flags & DMAMODE_READ) && sc->sc_recrun == NOTRUNNING) isa_dmadone(sc->sc_isa, sc->sc_recdrq); (*sc->sc_intr)(sc->sc_arg); retval = 1; } /* clear interrupt */ if (status & INTERRUPT_STATUS) ADWRITE(sc, AD1848_STATUS, 0); return(retval); } void * ad1848_malloc(addr, direction, size, pool, flags) void *addr; int direction; size_t size; int pool; int flags; { struct ad1848_softc *sc = addr; return isa_malloc(sc->sc_isa, 1, size, pool, flags); } void ad1848_free(addr, ptr, pool) void *addr; void *ptr; int pool; { isa_free(ptr, pool); } size_t ad1848_round(addr, direction, size) void *addr; int direction; size_t size; { if (size > MAX_ISADMA) size = MAX_ISADMA; return size; } paddr_t ad1848_mappage(addr, mem, off, prot) void *addr; void *mem; off_t off; int prot; { return isa_mappage(mem, off, prot); } int ad1848_get_props(addr) void *addr; { struct ad1848_softc *sc = addr; return AUDIO_PROP_MMAP | (sc->sc_drq != sc->sc_recdrq ? AUDIO_PROP_FULLDUPLEX : 0); }