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NetBSD/sys/dev/isa/ad1848.c
jtk aa8449a9ef fix compile errors & warnings
1996-10-16 01:12:18 +00:00

1640 lines
40 KiB
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/* $NetBSD: ad1848.c,v 1.13 1996/10/16 01:12:25 jtk 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 <hannu@voxware.pp.fi>
*
* Portions also supplied from the SoundBlaster driver for NetBSD.
*/
/*
* Todo:
* - Need datasheet for CS4231 (for use with GUS MAX)
* - Use fast audio_dma
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/syslog.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/buf.h>
#include <machine/cpu.h>
#include <machine/pio.h>
#include <sys/audioio.h>
#include <dev/audio_if.h>
#include <dev/isa/isavar.h>
#include <dev/isa/isadmavar.h>
#include <dev/ic/ad1848reg.h>
#include <dev/ic/cs4231reg.h>
#include <dev/isa/ad1848var.h>
#include <dev/isa/cs4231var.h>
#ifdef AUDIO_DEBUG
extern void Dprintf __P((const char *, ...));
#define DPRINTF(x) if (ad1848debug) Dprintf 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 */
0x19, /* Left DAC output Control */
0x19, /* Right DAC output Control */
/* Clock and Data Format */
CLOCK_XTAL1|FMT_PCM8|AUTO_CAL_ENABLE,
/* Interface Config */
SINGLE_DMA,
INTERRUPT_ENABLE, /* Pin control */
0x00, /* Test and Init */
0xca, /* Misc control */
ATTEN_0<<2, /* Digital Mix Control */
0, /* Upper base Count */
0, /* Lower base Count */
/* Thse are for CS4231 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 (mic) Control */
MONO_INPUT_MUTE|ATTEN_6, /* mute mic by default */
0, /* unused */
0, /* record format */
0, /* upper record count */
0, /* lower record count */
};
void ad1848_reset __P((struct ad1848_softc *));
int ad1848_set_speed __P((struct ad1848_softc *, int));
int ad1848_set_format __P((struct ad1848_softc *, int, int));
void ad1848_mute_monitor __P((void *, int));
static int ad_read __P((struct ad1848_softc *, int));
static __inline void ad_write __P((struct ad1848_softc *, int, int));
static void ad_set_MCE __P((struct ad1848_softc *, int));
static void wait_for_calibration __P((struct ad1848_softc *));
static int
ad_read(sc, reg)
struct ad1848_softc *sc;
int reg;
{
int x;
outb(sc->sc_iobase+AD1848_IADDR, (u_char) (reg & 0xff) | sc->MCE_bit);
x = inb(sc->sc_iobase+AD1848_IDATA);
/* printf("(%02x<-%02x) ", reg|sc->MCE_bit, x); */
return x;
}
static __inline void
ad_write(sc, reg, data)
struct ad1848_softc *sc;
int reg;
int data;
{
outb(sc->sc_iobase+AD1848_IADDR, (u_char) (reg & 0xff) | sc->MCE_bit);
outb(sc->sc_iobase+AD1848_IDATA, (u_char) (data & 0xff));
/* 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;
outb(sc->sc_iobase+AD1848_IADDR, sc->MCE_bit);
}
static void
wait_for_calibration(sc)
struct ad1848_softc *sc;
{
int timeout = 100000;
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.
*/
while (timeout > 0 && inb(sc->sc_iobase+AD1848_IADDR) == SP_IN_INIT)
timeout--;
if (inb(sc->sc_iobase+AD1848_IADDR) == SP_IN_INIT)
DPRINTF(("ad1848: Auto calibration timed out(1).\n"));
outb(sc->sc_iobase+AD1848_IADDR, SP_TEST_AND_INIT);
timeout = 100000;
while (timeout > 0 && inb(sc->sc_iobase+AD1848_IADDR) != SP_TEST_AND_INIT)
timeout--;
if (inb(sc->sc_iobase+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 __P((struct ad1848_softc *));
void
ad1848_dump_regs(sc)
struct ad1848_softc *sc;
{
int i;
u_char r;
printf("ad1848 status=%x", inb(sc->sc_iobase+AD1848_STATUS));
printf(" regs: ");
for (i = 0; i < 16; i++) {
r = ad_read(sc, i);
printf("%x ", r);
}
if (sc->mode == 2)
for (i = 16; i < 32; i++) {
r = ad_read(sc, i);
printf("%x ", r);
}
printf("\n");
}
#endif
#ifdef NEWCONFIG
void
ad1848_forceintr(sc)
struct ad1848_softc *sc;
{
static char dmabuf;
/*
* Set up a DMA read of one byte.
* XXX Note that at this point we haven't called
* at_setup_dmachan(). This is okay because it just
* allocates a buffer in case it needs to make a copy,
* and it won't need to make a copy for a 1 byte buffer.
* (I think that calling at_setup_dmachan() should be optional;
* if you don't call it, it will be called the first time
* it is needed (and you pay the latency). Also, you might
* never need the buffer anyway.)
*/
isa_dmastart(DMAMODE_READ, &dmabuf, 1, sc->sc_drq);
ad_write(sc, SP_LOWER_BASE_COUNT, 0);
ad_write(sc, SP_UPPER_BASE_COUNT, 0);
ad_write(sc, SP_INTERFACE_CONFIG, PLAYBACK_ENABLE);
}
#endif
/*
* Probe for the ad1848 chip
*/
int
ad1848_probe(sc)
struct ad1848_softc *sc;
{
register int iobase = sc->sc_iobase;
u_char tmp, tmp1 = 0xff, tmp2 = 0xff;
int i;
if (!AD1848_BASE_VALID(iobase)) {
printf("ad1848: configured iobase %x invalid\n", iobase);
return 0;
}
sc->sc_iobase = iobase;
/* 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.
*/
if (((tmp = inb(iobase+AD1848_IADDR)) & SP_IN_INIT) != 0x00) { /* Not a AD1848 */
DPRINTF(("ad_detect_A %x\n", tmp));
return 0;
}
/*
* 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));
return 0;
}
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));
return 0;
}
/*
* 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));
return 0;
}
/*
* 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)));
}
/*
* 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))) {
DPRINTF(("ad_detect_F(%d/%x/%x)\n", i, tmp1, tmp2));
return 0;
}
/*
* 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));
return 0;
}
/*
* 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:
sc->chip_name = "CS4232";
break;
}
}
sc->mode = 2;
}
}
/* Wait for 1848 to init */
while(inb(sc->sc_iobase+AD1848_IADDR) & SP_IN_INIT);
/* Wait for 1848 to autocal */
outb(sc->sc_iobase+AD1848_IADDR, SP_TEST_AND_INIT);
while(inb(sc->sc_iobase+AD1848_IDATA) & AUTO_CAL_IN_PROG);
return 1;
}
/*
* 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 = {150, 150};
struct ad1848_volume vol_0 = {0, 0};
sc->sc_locked = 0;
/* Initialize the ad1848... */
for (i = 0; i < 16; i++)
ad_write(sc, i, ad1848_init_values[i]);
/* ...and additional CS4231 stuff too */
if (sc->mode == 2) {
#if 0
ad_write(sc, SP_INTERFACE_CONFIG, 0); /* disable SINGLE_DMA feature */
#else
/* XXX SINGLE_DMA is cleared in ad1848_reset(), due to #if 0 */
#endif
for (i = 0x10; i <= 0x1F; i++)
if (ad1848_init_values[i] != 0)
ad_write(sc, i, ad1848_init_values[i]);
}
ad1848_reset(sc);
/* Set default encoding (ULAW) */
sc->sc_irate = sc->sc_orate = 8000;
sc->precision = 8;
sc->channels = 1;
sc->encoding = AUDIO_ENCODING_ULAW;
(void) ad1848_set_in_sr(sc, sc->sc_irate);
(void) ad1848_set_out_sr(sc, sc->sc_orate);
/* Set default gains */
(void) ad1848_set_rec_gain(sc, &vol_mid);
(void) ad1848_set_out_gain(sc, &vol_mid);
(void) ad1848_set_mon_gain(sc, &vol_0);
(void) ad1848_set_aux1_gain(sc, &vol_mid); /* CD volume */
if (sc->mode == 2) {
/* aux1 was really the DAC output */
(void) ad1848_set_aux2_gain(sc, &vol_mid); /* CD volume */
(void) cs4231_set_linein_gain(sc, &vol_mid);
(void) cs4231_set_mono_gain(sc, &vol_0); /* mic */
} else
(void) ad1848_set_aux2_gain(sc, &vol_0);
/* Set default port */
(void) ad1848_set_rec_port(sc, MIC_IN_PORT);
printf(": %s", sc->chip_name);
}
/*
* Various routines to interface to higher level audio driver
*/
int
ad1848_set_rec_gain(sc, gp)
register struct ad1848_softc *sc;
struct ad1848_volume *gp;
{
register 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);
}
int
ad1848_get_rec_gain(sc, gp)
register struct ad1848_softc *sc;
struct ad1848_volume *gp;
{
*gp = sc->rec_gain;
return(0);
}
int
ad1848_set_out_gain(sc, gp)
register struct ad1848_softc *sc;
struct ad1848_volume *gp;
{
u_char reg;
u_int atten;
DPRINTF(("ad1848_set_out_gain: %d:%d\n", gp->left, gp->right));
sc->out_gain = *gp;
atten = ((AUDIO_MAX_GAIN - gp->left) * OUTPUT_ATTEN_BITS)/AUDIO_MAX_GAIN;
reg = ad_read(sc, SP_LEFT_OUTPUT_CONTROL);
reg &= OUTPUT_ATTEN_MASK;
ad_write(sc, SP_LEFT_OUTPUT_CONTROL, (atten&0x3f)|reg);
atten = ((AUDIO_MAX_GAIN - gp->right) * OUTPUT_ATTEN_BITS)/AUDIO_MAX_GAIN;
reg = ad_read(sc, SP_RIGHT_OUTPUT_CONTROL);
reg &= OUTPUT_ATTEN_MASK;
ad_write(sc, SP_RIGHT_OUTPUT_CONTROL, (atten&0x3f)|reg);
return(0);
}
int
ad1848_get_out_gain(sc, gp)
register struct ad1848_softc *sc;
struct ad1848_volume *gp;
{
*gp = sc->out_gain;
return(0);
}
int
ad1848_set_mon_gain(sc, gp) /* monitor gain */
register struct ad1848_softc *sc;
struct ad1848_volume *gp;
{
u_char reg;
u_int atten;
DPRINTF(("ad1848_set_mon_gain: %d\n", gp->left));
sc->mon_gain = *gp;
atten = ((AUDIO_MAX_GAIN - gp->left) * OUTPUT_ATTEN_BITS)/AUDIO_MAX_GAIN;
reg = ad_read(sc, SP_DIGITAL_MIX);
reg &= MIX_ATTEN_MASK;
ad_write(sc, SP_DIGITAL_MIX, (atten&OUTPUT_ATTEN_BITS)|reg);
return(0);
}
int
ad1848_get_mon_gain(sc, gp)
register struct ad1848_softc *sc;
struct ad1848_volume *gp;
{
*gp = sc->mon_gain;
return(0);
}
int
cs4231_set_mono_gain(sc, gp)
register struct ad1848_softc *sc;
struct ad1848_volume *gp;
{
u_char reg, oreg;
u_int atten;
DPRINTF(("cs4231_set_mono_gain: %d\n", gp->left));
sc->mono_gain = *gp;
atten = ((AUDIO_MAX_GAIN - gp->left) * MONO_INPUT_ATTEN_BITS)/AUDIO_MAX_GAIN;
oreg = reg = ad_read(sc, CS_MONO_IO_CONTROL);
reg &= MONO_INPUT_ATTEN_MASK;
ad_write(sc, CS_MONO_IO_CONTROL, (atten&MONO_INPUT_ATTEN_BITS)|reg);
DPRINTF(("cs4231_set_mono_gain: was:%x\n", oreg));
return(0);
}
int
cs4231_get_mono_gain(sc, gp)
register struct ad1848_softc *sc;
struct ad1848_volume *gp;
{
*gp = sc->mono_gain;
return(0);
}
int
ad1848_set_mic_gain(sc, gp)
register 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)
register 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);
}
void
ad1848_mute_monitor(addr, mute)
void *addr;
int mute;
{
register struct ad1848_softc *sc = addr;
DPRINTF(("ad1848_mute_monitor: %smuting\n", mute ? "" : "un"));
if (sc->mode == 2) {
cs4231_mute_monitor(sc, mute);
cs4231_mute_mono(sc, mute);
cs4231_mute_line(sc, mute);
}
ad1848_mute_aux1(sc, mute);
ad1848_mute_aux2(sc, mute);
}
void
cs4231_mute_monitor(sc, mute)
register struct ad1848_softc *sc;
int mute;
{
u_char reg;
if (mute) {
DPRINTF(("cs4231_mute_monitor: muting\n"));
reg = ad_read(sc, SP_LEFT_OUTPUT_CONTROL);
ad_write(sc, SP_LEFT_OUTPUT_CONTROL, OUTPUT_MUTE|reg);
reg = ad_read(sc, SP_RIGHT_OUTPUT_CONTROL);
ad_write(sc, SP_RIGHT_OUTPUT_CONTROL, OUTPUT_MUTE|reg);
} else if (!sc->mon_mute) {
DPRINTF(("cs4231_mute_monitor: unmuting\n"));
reg = ad_read(sc, SP_LEFT_OUTPUT_CONTROL);
ad_write(sc, SP_LEFT_OUTPUT_CONTROL, reg & ~OUTPUT_MUTE);
reg = ad_read(sc, SP_RIGHT_OUTPUT_CONTROL);
ad_write(sc, SP_RIGHT_OUTPUT_CONTROL, reg & ~OUTPUT_MUTE);
}
}
void
cs4231_mute_mono(sc, mute)
register struct ad1848_softc *sc;
int mute;
{
u_char reg;
if (mute) {
DPRINTF(("cs4231_mute_mono: muting\n"));
reg = ad_read(sc, CS_MONO_IO_CONTROL);
ad_write(sc, CS_MONO_IO_CONTROL, MONO_INPUT_MUTE|reg);
} else if (!sc->mono_mute) {
DPRINTF(("cs4231_mute_mono: unmuting\n"));
reg = ad_read(sc, CS_MONO_IO_CONTROL);
ad_write(sc, CS_MONO_IO_CONTROL, reg & ~MONO_INPUT_MUTE);
}
}
void
cs4231_mute_line(sc, mute)
register struct ad1848_softc *sc;
int mute;
{
u_char reg;
if (mute) {
DPRINTF(("cs4231_mute_line: muting\n"));
reg = ad_read(sc, CS_LEFT_LINE_CONTROL);
ad_write(sc, CS_LEFT_LINE_CONTROL, LINE_INPUT_MUTE|reg);
reg = ad_read(sc, CS_RIGHT_LINE_CONTROL);
ad_write(sc, CS_RIGHT_LINE_CONTROL, LINE_INPUT_MUTE|reg);
} else if (!sc->line_mute) {
DPRINTF(("cs4231_mute_line: unmuting\n"));
reg = ad_read(sc, CS_LEFT_LINE_CONTROL);
ad_write(sc, CS_LEFT_LINE_CONTROL, reg & ~LINE_INPUT_MUTE);
reg = ad_read(sc, CS_RIGHT_LINE_CONTROL);
ad_write(sc, CS_RIGHT_LINE_CONTROL, reg & ~LINE_INPUT_MUTE);
}
}
void
ad1848_mute_aux1(sc, mute)
register struct ad1848_softc *sc;
int mute;
{
u_char reg;
if (mute) {
DPRINTF(("ad1848_mute_aux1: muting\n"));
reg = ad_read(sc, SP_LEFT_AUX1_CONTROL);
ad_write(sc, SP_LEFT_AUX1_CONTROL, AUX_INPUT_MUTE|reg);
reg = ad_read(sc, SP_RIGHT_AUX1_CONTROL);
ad_write(sc, SP_RIGHT_AUX1_CONTROL, AUX_INPUT_MUTE|reg);
} else if (!sc->aux1_mute) {
DPRINTF(("ad1848_mute_aux1: unmuting\n"));
reg = ad_read(sc, SP_LEFT_AUX1_CONTROL);
ad_write(sc, SP_LEFT_AUX1_CONTROL, reg & ~AUX_INPUT_MUTE);
reg = ad_read(sc, SP_RIGHT_AUX1_CONTROL);
ad_write(sc, SP_RIGHT_AUX1_CONTROL, reg & ~AUX_INPUT_MUTE);
}
}
void
ad1848_mute_aux2(sc, mute)
register struct ad1848_softc *sc;
int mute;
{
u_char reg;
if (mute) {
DPRINTF(("ad1848_mute_aux2: muting\n"));
reg = ad_read(sc, SP_LEFT_AUX2_CONTROL);
ad_write(sc, SP_LEFT_AUX2_CONTROL, AUX_INPUT_MUTE|reg);
reg = ad_read(sc, SP_RIGHT_AUX2_CONTROL);
ad_write(sc, SP_RIGHT_AUX2_CONTROL, AUX_INPUT_MUTE|reg);
} else if (!sc->aux2_mute) {
DPRINTF(("ad1848_mute_aux2: unmuting\n"));
reg = ad_read(sc, SP_LEFT_AUX2_CONTROL);
ad_write(sc, SP_LEFT_AUX2_CONTROL, reg & ~AUX_INPUT_MUTE);
reg = ad_read(sc, SP_RIGHT_AUX2_CONTROL);
ad_write(sc, SP_RIGHT_AUX2_CONTROL, reg & ~AUX_INPUT_MUTE);
}
}
int
ad1848_set_aux1_gain(sc, gp)
register struct ad1848_softc *sc;
struct ad1848_volume *gp;
{
u_char reg;
u_int atten;
DPRINTF(("ad1848_set_aux1_gain: %d:%d\n", gp->left, gp->right));
sc->aux1_gain = *gp;
atten = ((AUDIO_MAX_GAIN - gp->left) * AUX_INPUT_ATTEN_BITS)/AUDIO_MAX_GAIN;
reg = ad_read(sc, SP_LEFT_AUX1_CONTROL);
reg &= ~(AUX_INPUT_ATTEN_BITS);
ad_write(sc, SP_LEFT_AUX1_CONTROL, (atten&0x1f)|reg);
atten = ((AUDIO_MAX_GAIN - gp->right) * AUX_INPUT_ATTEN_BITS)/AUDIO_MAX_GAIN;
reg = ad_read(sc, SP_RIGHT_AUX1_CONTROL);
reg &= ~(AUX_INPUT_ATTEN_BITS);
ad_write(sc, SP_RIGHT_AUX1_CONTROL, (atten&0x1f)|reg);
return(0);
}
int
ad1848_get_aux1_gain(sc, gp)
register struct ad1848_softc *sc;
struct ad1848_volume *gp;
{
*gp = sc->aux1_gain;
return(0);
}
int
cs4231_set_linein_gain(sc, gp)
register struct ad1848_softc *sc;
struct ad1848_volume *gp;
{
u_char reg, oregl, oregr;
u_int atten;
DPRINTF(("ad1848_set_linein_gain: %d:%d\n", gp->left, gp->right));
sc->line_gain = *gp;
atten = ((AUDIO_MAX_GAIN - gp->left) * LINE_INPUT_ATTEN_BITS)/AUDIO_MAX_GAIN;
oregl = reg = ad_read(sc, CS_LEFT_LINE_CONTROL);
reg &= ~(LINE_INPUT_ATTEN_BITS);
ad_write(sc, CS_LEFT_LINE_CONTROL, (atten&LINE_INPUT_ATTEN_BITS)|reg);
atten = ((AUDIO_MAX_GAIN - gp->right) * LINE_INPUT_ATTEN_BITS)/AUDIO_MAX_GAIN;
oregr = reg = ad_read(sc, CS_RIGHT_LINE_CONTROL);
reg &= ~(LINE_INPUT_ATTEN_BITS);
ad_write(sc, CS_RIGHT_LINE_CONTROL, (atten&LINE_INPUT_ATTEN_BITS)|reg);
DPRINTF(("ad1848_set_linein_gain: was %x:%x\n", oregl, oregr));
return(0);
}
int
cs4231_get_linein_gain(sc, gp)
register struct ad1848_softc *sc;
struct ad1848_volume *gp;
{
*gp = sc->line_gain;
return(0);
}
int
ad1848_set_aux2_gain(sc, gp)
register struct ad1848_softc *sc;
struct ad1848_volume *gp;
{
u_char reg;
u_int atten;
DPRINTF(("ad1848_set_aux2_gain: %d:%d\n", gp->left, gp->right));
sc->aux2_gain = *gp;
atten = ((AUDIO_MAX_GAIN - gp->left) * AUX_INPUT_ATTEN_BITS)/AUDIO_MAX_GAIN;
reg = ad_read(sc, SP_LEFT_AUX2_CONTROL);
reg &= ~(AUX_INPUT_ATTEN_BITS);
ad_write(sc, SP_LEFT_AUX2_CONTROL, (atten&0x1f)|reg);
atten = ((AUDIO_MAX_GAIN - gp->right) * AUX_INPUT_ATTEN_BITS)/AUDIO_MAX_GAIN;
reg = ad_read(sc, SP_RIGHT_AUX2_CONTROL);
reg &= ~(AUX_INPUT_ATTEN_BITS);
ad_write(sc, SP_RIGHT_AUX2_CONTROL, (atten&0x1f)|reg);
return(0);
}
int
ad1848_get_aux2_gain(sc, gp)
register struct ad1848_softc *sc;
struct ad1848_volume *gp;
{
*gp = sc->aux2_gain;
return 0;
}
int
ad1848_set_in_sr(addr, sr)
void *addr;
u_long sr;
{
register struct ad1848_softc *sc = addr;
DPRINTF(("ad1848_set_in_sr: %d\n", sr));
sc->sc_irate = sc->sc_orate = ad1848_set_speed(sc, sr);
return(0);
}
u_long
ad1848_get_in_sr(addr)
void *addr;
{
register struct ad1848_softc *sc = addr;
return(sc->sc_irate);
}
int
ad1848_set_out_sr(addr, sr)
void *addr;
u_long sr;
{
register struct ad1848_softc *sc = addr;
DPRINTF(("ad1848_set_out_sr: %d\n", sr));
sc->sc_irate = sc->sc_orate = ad1848_set_speed(sc, sr);
return(0);
}
u_long
ad1848_get_out_sr(addr)
void *addr;
{
register struct ad1848_softc *sc = addr;
return(sc->sc_orate);
}
int
ad1848_query_encoding(addr, fp)
void *addr;
struct audio_encoding *fp;
{
switch (fp->index) {
case 0:
strcpy(fp->name, AudioEmulaw);
fp->format_id = AUDIO_ENCODING_ULAW;
break;
case 1:
strcpy(fp->name, AudioEalaw);
fp->format_id = AUDIO_ENCODING_ALAW;
break;
case 2:
strcpy(fp->name, AudioEpcm16);
fp->format_id = AUDIO_ENCODING_PCM16;
break;
case 3:
strcpy(fp->name, AudioEpcm8);
fp->format_id = AUDIO_ENCODING_PCM8;
break;
default:
return(EINVAL);
/*NOTREACHED*/
}
return (0);
}
int
ad1848_set_encoding(addr, enc)
void *addr;
u_int enc;
{
register struct ad1848_softc *sc = addr;
DPRINTF(("ad1848_set_encoding: %d\n", enc));
if (sc->encoding != AUDIO_ENCODING_PCM8 &&
sc->encoding != AUDIO_ENCODING_PCM16 &&
sc->encoding != AUDIO_ENCODING_ALAW &&
sc->encoding != AUDIO_ENCODING_ULAW) {
sc->encoding = AUDIO_ENCODING_PCM8;
return (EINVAL);
}
sc->encoding = ad1848_set_format(sc, enc, sc->precision);
if (sc->encoding == -1) {
sc->encoding = AUDIO_ENCODING_PCM8;
return (EINVAL);
}
return (0);
}
int
ad1848_get_encoding(addr)
void *addr;
{
register struct ad1848_softc *sc = addr;
return(sc->encoding);
}
int
ad1848_set_precision(addr, prec)
void *addr;
u_int prec;
{
register struct ad1848_softc *sc = addr;
DPRINTF(("ad1848_set_precision: %d\n", prec));
sc->encoding = ad1848_set_format(sc, sc->encoding, prec);
if (sc->encoding == -1) {
sc->encoding = AUDIO_ENCODING_PCM16;
sc->precision = 16;
return (EINVAL);
}
sc->precision = prec;
return (0);
}
int
ad1848_get_precision(addr)
void *addr;
{
register struct ad1848_softc *sc = addr;
return(sc->precision);
}
int
ad1848_set_channels(addr, chans)
void *addr;
int chans;
{
register struct ad1848_softc *sc = addr;
DPRINTF(("ad1848_set_channels: %d\n", chans));
if (chans < 1 || chans > 2)
return(EINVAL);
sc->channels = chans;
return(0);
}
int
ad1848_get_channels(addr)
void *addr;
{
register struct ad1848_softc *sc = addr;
return(sc->channels);
}
int
ad1848_set_rec_port(sc, port)
register 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)
register struct ad1848_softc *sc;
{
return(sc->rec_port);
}
int
ad1848_round_blocksize(addr, blk)
void *addr;
int blk;
{
register struct ad1848_softc *sc = addr;
sc->sc_lastcc = -1;
/* Higher speeds need bigger blocks to avoid popping and silence gaps. */
if ((sc->sc_orate > 8000 || sc->sc_irate > 8000) && blk < NBPG/2)
blk = NBPG/2;
/* don't try to DMA too much at once, though. */
if (blk > NBPG)
blk = NBPG;
if (sc->channels == 2)
return (blk & ~1); /* must be even to preserve stereo separation */
else
return(blk); /* Anything goes :-) */
}
u_int
ad1848_get_silence(enc)
int enc;
{
#define ULAW_SILENCE 0x7f
#define ALAW_SILENCE 0x55
#define LINEAR_SILENCE 0
u_int auzero;
switch (enc) {
case AUDIO_ENCODING_ULAW:
auzero = ULAW_SILENCE;
break;
case AUDIO_ENCODING_ALAW:
auzero = ALAW_SILENCE;
break;
case AUDIO_ENCODING_PCM8:
case AUDIO_ENCODING_PCM16:
default:
auzero = LINEAR_SILENCE;
break;
}
return(auzero);
}
int
ad1848_open(sc, dev, flags)
struct ad1848_softc *sc;
dev_t dev;
int flags;
{
DPRINTF(("ad1848_open: sc=0x%x\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;
register u_char r;
sc->sc_intr = 0;
DPRINTF(("ad1848_close: stop DMA\n"));
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 = 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) inb(sc->sc_iobase+AD1848_IDATA);
(void) inb(sc->sc_iobase+AD1848_IDATA);
/*
* Write to I8 starts resyncronization. Wait until it completes.
*/
timeout = 100000;
while (timeout > 0 && inb(sc->sc_iobase+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) inb(sc->sc_iobase+AD1848_IDATA);
(void) inb(sc->sc_iobase+AD1848_IDATA);
/* Now wait for resync for capture side of the house */
}
/*
* Write to I8 starts resyncronization. Wait until it completes.
*/
timeout = 100000;
while (timeout > 0 && inb(sc->sc_iobase+AD1848_IADDR) == SP_IN_INIT)
timeout--;
if (inb(sc->sc_iobase+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);
return 0;
}
void
ad1848_reset(sc)
register struct ad1848_softc *sc;
{
#if 0
u_char r;
#endif
DPRINTF(("ad1848_reset\n"));
/* Clear the PEN and CEN bits */
#if 0
r = ad_read(sc, SP_INTERFACE_CONFIG);
r &= ~(CAPTURE_ENABLE|PLAYBACK_ENABLE);
ad_write(sc, SP_INTERFACE_CONFIG, r);
#else
ad_write(sc, SP_INTERFACE_CONFIG, 0);
#endif
if (sc->mode == 2) {
outb(sc->sc_iobase+AD1848_IADDR, CS_IRQ_STATUS);
outb(sc->sc_iobase+AD1848_IDATA, 0);
}
/* Clear interrupt status */
outb(sc->sc_iobase+AD1848_STATUS, 0);
#ifdef AUDIO_DEBUG
if (ad1848debug)
ad1848_dump_regs(sc);
#endif
}
int
ad1848_set_speed(sc, arg)
register struct ad1848_softc *sc;
int arg;
{
/*
* 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;
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 = speed_table[selected].speed;
sc->speed_bits = speed_table[selected].bits;
return sc->speed;
}
int
ad1848_set_format(sc, fmt, prec)
register struct ad1848_softc *sc;
int fmt, prec;
{
static u_char format2bits[] = {
/* AUDIO_ENCODING_ULAW */ FMT_ULAW >> 5,
/* AUDIO_ENCODING_ALAW */ FMT_ALAW >> 5,
/* AUDIO_ENCODING_PCM16 */ FMT_TWOS_COMP >> 5,
/* AUDIO_ENCODING_PCM8 */ FMT_PCM8 >> 5
};
DPRINTF(("ad1848_set_format: fmt=%d prec=%d\n", fmt, prec));
/* If not linear; force prec to 8bits */
if (fmt != AUDIO_ENCODING_PCM16 && prec == 16)
prec = 8;
if (fmt < AUDIO_ENCODING_ULAW || fmt > AUDIO_ENCODING_PCM8)
goto nogood;
if (prec != 8 && prec != 16)
goto nogood;
sc->format_bits = format2bits[fmt-1];
if (fmt == AUDIO_ENCODING_PCM16 && prec == 8)
sc->format_bits = FMT_PCM8 >> 5; /* signed vs. unsigned samples? */
DPRINTF(("ad1848_set_format: bits=%x\n", sc->format_bits));
return fmt;
nogood:
sc->format_bits = 0;
return -1;
}
/*
* Halt a DMA in progress.
*/
int
ad1848_halt_out_dma(addr)
void *addr;
{
register 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;
{
register 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_cont_out_dma(addr)
void *addr;
{
register struct ad1848_softc *sc = addr;
u_char reg;
DPRINTF(("ad1848: ad1848_cont_out_dma %s\n", sc->sc_locked?"(locked)":""));
reg = ad_read(sc, SP_INTERFACE_CONFIG);
ad_write(sc, SP_INTERFACE_CONFIG, (reg | PLAYBACK_ENABLE));
return(0);
}
int
ad1848_cont_in_dma(addr)
void *addr;
{
register struct ad1848_softc *sc = addr;
u_char reg;
DPRINTF(("ad1848: ad1848_cont_in_dma %s\n", sc->sc_locked?"(locked)":""));
reg = ad_read(sc, SP_INTERFACE_CONFIG);
ad_write(sc, SP_INTERFACE_CONFIG, (reg | CAPTURE_ENABLE));
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) __P((void *));
void *arg;
{
register struct ad1848_softc *sc = addr;
register u_char reg;
if (sc->sc_locked) {
DPRINTF(("ad1848_dma_input: locked\n"));
return 0;
}
#ifdef AUDIO_DEBUG
if (ad1848debug > 1)
Dprintf("ad1848_dma_input: cc=%d 0x%x (0x%x)\n", cc, intr, arg);
#endif
sc->sc_locked = 1;
sc->sc_intr = intr;
sc->sc_arg = arg;
sc->sc_dma_flags = DMAMODE_READ;
sc->sc_dma_bp = p;
sc->sc_dma_cnt = cc;
isa_dmastart(DMAMODE_READ, p, cc, sc->sc_recdrq);
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;
}
return 0;
}
int
ad1848_dma_output(addr, p, cc, intr, arg)
void *addr;
void *p;
int cc;
void (*intr) __P((void *));
void *arg;
{
register struct ad1848_softc *sc = addr;
register u_char reg;
if (sc->sc_locked) {
DPRINTF(("ad1848_dma_output: locked\n"));
return 0;
}
#ifdef AUDIO_DEBUG
if (ad1848debug > 1)
Dprintf("ad1848_dma_output: cc=%d 0x%x (0x%x)\n", cc, intr, arg);
#endif
sc->sc_locked = 1;
sc->sc_intr = intr;
sc->sc_arg = arg;
sc->sc_dma_flags = DMAMODE_WRITE;
sc->sc_dma_bp = p;
sc->sc_dma_cnt = cc;
isa_dmastart(DMAMODE_WRITE, p, cc, sc->sc_drq);
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;
}
return 0;
}
int
ad1848_intr(arg)
void *arg;
{
register struct ad1848_softc *sc = arg;
int retval = 0;
u_char status;
/* Get intr status */
status = inb(sc->sc_iobase+AD1848_STATUS);
#ifdef AUDIO_DEBUG
if (ad1848debug > 1)
Dprintf("ad1848_intr: intr=0x%x 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)
isa_dmadone(sc->sc_dma_flags, sc->sc_dma_bp, sc->sc_dma_cnt - 1, sc->sc_recdrq);
(*sc->sc_intr)(sc->sc_arg);
retval = 1;
}
/* clear interrupt */
if (status & INTERRUPT_STATUS)
outb(sc->sc_iobase+AD1848_STATUS, 0);
return(retval);
}
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