* Copyright (c) 1999, 2008 The NetBSD Foundation, Inc.

/* $NetBSD: fms.c,v 1.50 2024/01/08 18:37:24 chs Exp $ */

/*-
* Copyright (c) 1999, 2008 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Witold J. Wnuk.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/

/*
* Forte Media FM801 Audio Device Driver
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: fms.c,v 1.50 2024/01/08 18:37:24 chs Exp $");

#include "mpu.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/kmem.h>
#include <sys/device.h>
#include <sys/audioio.h>

#include <sys/bus.h>
#include <sys/cpu.h>

#include <dev/pci/pcidevs.h>
#include <dev/pci/pcivar.h>

#include <dev/audio/audio_if.h>

#include <dev/ic/ac97var.h>
#include <dev/ic/mpuvar.h>

#include <dev/pci/fmsvar.h>

struct fms_dma {
struct fms_dma *next;
void *addr;
size_t size;
bus_dmamap_t map;
bus_dma_segment_t seg;
};

static int fms_match(device_t, cfdata_t, void *);
static void fms_attach(device_t, device_t, void *);
static int fms_intr(void *);

static int fms_query_format(void *, audio_format_query_t *);
static int fms_set_format(void *, int,
const audio_params_t *, const audio_params_t *,
audio_filter_reg_t *, audio_filter_reg_t *);
static int fms_round_blocksize(void *, int, int, const audio_params_t *);
static int fms_halt_output(void *);
static int fms_halt_input(void *);
static int fms_getdev(void *, struct audio_device *);
static int fms_set_port(void *, mixer_ctrl_t *);
static int fms_get_port(void *, mixer_ctrl_t *);
static int fms_query_devinfo(void *, mixer_devinfo_t *);
static void *fms_malloc(void *, int, size_t);
static void fms_free(void *, void *, size_t);
static int fms_get_props(void *);
static int fms_trigger_output(void *, void *, void *, int,
void (*)(void *), void *,
const audio_params_t *);
static int fms_trigger_input(void *, void *, void *, int,
void (*)(void *), void *,
const audio_params_t *);
static void fms_get_locks(void *, kmutex_t **, kmutex_t **);

CFATTACH_DECL_NEW(fms, sizeof (struct fms_softc),
fms_match, fms_attach, NULL, NULL);

static struct audio_device fms_device = {
"Forte Media 801",
"1.0",
"fms"
};

/*
* The frequency list in this format is also referred from fms_rate2index().
* So don't rearrange or delete entries.
*/
static const struct audio_format fms_formats[] = {
{
.mode = AUMODE_PLAY | AUMODE_RECORD,
.encoding = AUDIO_ENCODING_SLINEAR_LE,
.validbits = 16,
.precision = 16,
.channels = 2,
.channel_mask = AUFMT_STEREO,
.frequency_type = 11,
.frequency = { 5500, 8000, 9600, 11025, 16000, 19200,
22050, 32000, 38400, 44100, 48000},
},
};
#define FMS_NFORMATS __arraycount(fms_formats)

static const struct audio_hw_if fms_hw_if = {
.query_format = fms_query_format,
.set_format = fms_set_format,
.round_blocksize = fms_round_blocksize,
.halt_output = fms_halt_output,
.halt_input = fms_halt_input,
.getdev = fms_getdev,
.set_port = fms_set_port,
.get_port = fms_get_port,
.query_devinfo = fms_query_devinfo,
.allocm = fms_malloc,
.freem = fms_free,
.get_props = fms_get_props,
.trigger_output = fms_trigger_output,
.trigger_input = fms_trigger_input,
.get_locks = fms_get_locks,
};

static int fms_attach_codec(void *, struct ac97_codec_if *);
static int fms_read_codec(void *, uint8_t, uint16_t *);
static int fms_write_codec(void *, uint8_t, uint16_t);
static int fms_reset_codec(void *);
static int fms_rate2index(u_int);

#define FM_PCM_VOLUME 0x00
#define FM_FM_VOLUME 0x02
#define FM_I2S_VOLUME 0x04
#define FM_RECORD_SOURCE 0x06

#define FM_PLAY_CTL 0x08
#define FM_PLAY_RATE_MASK 0x0f00
#define FM_PLAY_BUF1_LAST 0x0001
#define FM_PLAY_BUF2_LAST 0x0002
#define FM_PLAY_START 0x0020
#define FM_PLAY_PAUSE 0x0040
#define FM_PLAY_STOPNOW 0x0080
#define FM_PLAY_16BIT 0x4000
#define FM_PLAY_STEREO 0x8000

#define FM_PLAY_DMALEN 0x0a
#define FM_PLAY_DMABUF1 0x0c
#define FM_PLAY_DMABUF2 0x10

#define FM_REC_CTL 0x14
#define FM_REC_RATE_MASK 0x0f00
#define FM_REC_BUF1_LAST 0x0001
#define FM_REC_BUF2_LAST 0x0002
#define FM_REC_START 0x0020
#define FM_REC_PAUSE 0x0040
#define FM_REC_STOPNOW 0x0080
#define FM_REC_16BIT 0x4000
#define FM_REC_STEREO 0x8000

#define FM_REC_DMALEN 0x16
#define FM_REC_DMABUF1 0x18
#define FM_REC_DMABUF2 0x1c

#define FM_CODEC_CTL 0x22
#define FM_VOLUME 0x26
#define FM_VOLUME_MUTE 0x8000

#define FM_CODEC_CMD 0x2a
#define FM_CODEC_CMD_READ 0x0080
#define FM_CODEC_CMD_VALID 0x0100
#define FM_CODEC_CMD_BUSY 0x0200

#define FM_CODEC_DATA 0x2c

#define FM_IO_CTL 0x52
#define FM_CARD_CTL 0x54

#define FM_INTMASK 0x56
#define FM_INTMASK_PLAY 0x0001
#define FM_INTMASK_REC 0x0002
#define FM_INTMASK_VOL 0x0040
#define FM_INTMASK_MPU 0x0080

#define FM_INTSTATUS 0x5a
#define FM_INTSTATUS_PLAY 0x0100
#define FM_INTSTATUS_REC 0x0200
#define FM_INTSTATUS_VOL 0x4000
#define FM_INTSTATUS_MPU 0x8000

static int
fms_match(device_t parent, cfdata_t match, void *aux)
{
struct pci_attach_args *pa;

pa = (struct pci_attach_args *)aux;
if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_FORTEMEDIA)
return 0;
if (PCI_PRODUCT(pa->pa_id) != PCI_PRODUCT_FORTEMEDIA_FM801)
return 0;

return 1;
}

static void
fms_attach(device_t parent, device_t self, void *aux)
{
struct pci_attach_args *pa;
struct fms_softc *sc;
struct audio_attach_args aa;
const char *intrstr;
pci_chipset_tag_t pc;
pcitag_t pt;
pci_intr_handle_t ih;
uint16_t k1;
char intrbuf[PCI_INTRSTR_LEN];

pa = aux;
sc = device_private(self);
sc->sc_dev = self;
intrstr = NULL;
pc = pa->pa_pc;
pt = pa->pa_tag;
aprint_naive(": Audio controller\n");
aprint_normal(": Forte Media FM-801\n");

if (pci_mapreg_map(pa, 0x10, PCI_MAPREG_TYPE_IO, 0, &sc->sc_iot,
&sc->sc_ioh, &sc->sc_ioaddr, &sc->sc_iosize)) {
aprint_error_dev(sc->sc_dev, "can't map i/o space\n");
return;
}
if (bus_space_subregion(sc->sc_iot, sc->sc_ioh, 0x30, 2,
&sc->sc_mpu_ioh))
panic("fms_attach: can't get mpu subregion handle");
if (bus_space_subregion(sc->sc_iot, sc->sc_ioh, 0x68, 4,
&sc->sc_opl_ioh))
panic("fms_attach: can't get opl subregion handle");

if (pci_intr_map(pa, &ih)) {
aprint_error_dev(sc->sc_dev, "couldn't map interrupt\n");
return;
}
intrstr = pci_intr_string(pc, ih, intrbuf, sizeof(intrbuf));

mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE);
mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_AUDIO);

sc->sc_ih = pci_intr_establish_xname(pc, ih, IPL_AUDIO, fms_intr, sc,
device_xname(self));
if (sc->sc_ih == NULL) {
aprint_error_dev(sc->sc_dev, "couldn't establish interrupt");
if (intrstr != NULL)
aprint_error(" at %s", intrstr);
aprint_error("\n");
mutex_destroy(&sc->sc_lock);
mutex_destroy(&sc->sc_intr_lock);
return;
}

sc->sc_dmat = pa->pa_dmat;

aprint_normal_dev(sc->sc_dev, "interrupting at %s\n", intrstr);

/* Disable legacy audio (SBPro compatibility) */
pci_conf_write(pc, pt, 0x40, 0);

/* Reset codec and AC'97 */
bus_space_write_2(sc->sc_iot, sc->sc_ioh, FM_CODEC_CTL, 0x0020);
delay(2); /* > 1us according to AC'97 documentation */
bus_space_write_2(sc->sc_iot, sc->sc_ioh, FM_CODEC_CTL, 0x0000);
delay(1); /* > 168.2ns according to AC'97 documentation */

/* Set up volume */
bus_space_write_2(sc->sc_iot, sc->sc_ioh, FM_PCM_VOLUME, 0x0808);
bus_space_write_2(sc->sc_iot, sc->sc_ioh, FM_FM_VOLUME, 0x0808);
bus_space_write_2(sc->sc_iot, sc->sc_ioh, FM_I2S_VOLUME, 0x0808);

bus_space_write_2(sc->sc_iot, sc->sc_ioh, FM_RECORD_SOURCE, 0x0000);

/* Unmask playback, record and mpu interrupts, mask the rest */
k1 = bus_space_read_2(sc->sc_iot, sc->sc_ioh, FM_INTMASK);
bus_space_write_2(sc->sc_iot, sc->sc_ioh, FM_INTMASK,
(k1 & ~(FM_INTMASK_PLAY | FM_INTMASK_REC | FM_INTMASK_MPU)) |
FM_INTMASK_VOL);
bus_space_write_2(sc->sc_iot, sc->sc_ioh, FM_INTSTATUS,
FM_INTSTATUS_PLAY | FM_INTSTATUS_REC | FM_INTSTATUS_MPU |
FM_INTSTATUS_VOL);

sc->host_if.arg = sc;
sc->host_if.attach = fms_attach_codec;
sc->host_if.read = fms_read_codec;
sc->host_if.write = fms_write_codec;
sc->host_if.reset = fms_reset_codec;

if (ac97_attach(&sc->host_if, self, &sc->sc_lock) != 0) {
mutex_destroy(&sc->sc_intr_lock);
mutex_destroy(&sc->sc_lock);
return;
}

audio_attach_mi(&fms_hw_if, sc, sc->sc_dev);

aa.type = AUDIODEV_TYPE_OPL;
aa.hwif = NULL;
aa.hdl = NULL;
config_found(sc->sc_dev, &aa, audioprint, CFARGS(.iattr = "fms"));

aa.type = AUDIODEV_TYPE_MPU;
aa.hwif = NULL;
aa.hdl = NULL;
sc->sc_mpu_dev = config_found(sc->sc_dev, &aa, audioprint,
CFARGS(.iattr = "fms"));
}

/*
* Each AC-link frame takes 20.8us, data should be ready in next frame,
* we allow more than two.
*/
#define TIMO 50
static int
fms_read_codec(void *addr, uint8_t reg, uint16_t *val)
{
struct fms_softc *sc;
int i;

sc = addr;
/* Poll until codec is ready */
for (i = 0; i < TIMO && bus_space_read_2(sc->sc_iot, sc->sc_ioh,
FM_CODEC_CMD) & FM_CODEC_CMD_BUSY; i++)
delay(1);
if (i >= TIMO) {
printf("fms: codec busy\n");
return 1;
}

/* Write register index, read access */
bus_space_write_2(sc->sc_iot, sc->sc_ioh, FM_CODEC_CMD,
reg | FM_CODEC_CMD_READ);

/* Poll until we have valid data */
for (i = 0; i < TIMO && !(bus_space_read_2(sc->sc_iot, sc->sc_ioh,
FM_CODEC_CMD) & FM_CODEC_CMD_VALID); i++)
delay(1);
if (i >= TIMO) {
printf("fms: no data from codec\n");
return 1;
}

/* Read data */
*val = bus_space_read_2(sc->sc_iot, sc->sc_ioh, FM_CODEC_DATA);
return 0;
}

static int
fms_write_codec(void *addr, uint8_t reg, uint16_t val)
{
struct fms_softc *sc = addr;
int i;

/* Poll until codec is ready */
for (i = 0; i < TIMO && bus_space_read_2(sc->sc_iot, sc->sc_ioh,
FM_CODEC_CMD) & FM_CODEC_CMD_BUSY; i++)
delay(1);
if (i >= TIMO) {
printf("fms: codec busy\n");
return 1;
}

/* Write data */
bus_space_write_2(sc->sc_iot, sc->sc_ioh, FM_CODEC_DATA, val);
/* Write index register, write access */
bus_space_write_2(sc->sc_iot, sc->sc_ioh, FM_CODEC_CMD, reg);
return 0;
}
#undef TIMO

static int
fms_attach_codec(void *addr, struct ac97_codec_if *cif)
{
struct fms_softc *sc;

sc = addr;
sc->codec_if = cif;
return 0;
}

/* Cold Reset */
static int
fms_reset_codec(void *addr)
{
struct fms_softc *sc;

sc = addr;
bus_space_write_2(sc->sc_iot, sc->sc_ioh, FM_CODEC_CTL, 0x0020);
delay(2);
bus_space_write_2(sc->sc_iot, sc->sc_ioh, FM_CODEC_CTL, 0x0000);
delay(1);
return 0;
}

static int
fms_intr(void *arg)
{
struct fms_softc *sc = arg;
#if NMPU > 0
struct mpu_softc *sc_mpu = device_private(sc->sc_mpu_dev);
#endif
uint16_t istat;

mutex_spin_enter(&sc->sc_intr_lock);

istat = bus_space_read_2(sc->sc_iot, sc->sc_ioh, FM_INTSTATUS);

if (istat & FM_INTSTATUS_PLAY) {
if ((sc->sc_play_nextblk += sc->sc_play_blksize) >=
sc->sc_play_end)
sc->sc_play_nextblk = sc->sc_play_start;

bus_space_write_4(sc->sc_iot, sc->sc_ioh,
sc->sc_play_flip++ & 1 ?
FM_PLAY_DMABUF2 : FM_PLAY_DMABUF1, sc->sc_play_nextblk);

if (sc->sc_pintr)
sc->sc_pintr(sc->sc_parg);
else
printf("unexpected play intr\n");
}

if (istat & FM_INTSTATUS_REC) {
if ((sc->sc_rec_nextblk += sc->sc_rec_blksize) >=
sc->sc_rec_end)
sc->sc_rec_nextblk = sc->sc_rec_start;

bus_space_write_4(sc->sc_iot, sc->sc_ioh,
sc->sc_rec_flip++ & 1 ?
FM_REC_DMABUF2 : FM_REC_DMABUF1, sc->sc_rec_nextblk);

if (sc->sc_rintr)
sc->sc_rintr(sc->sc_rarg);
else
printf("unexpected rec intr\n");
}

#if NMPU > 0
if (istat & FM_INTSTATUS_MPU)
mpu_intr(sc_mpu);
#endif

bus_space_write_2(sc->sc_iot, sc->sc_ioh, FM_INTSTATUS,
istat & (FM_INTSTATUS_PLAY | FM_INTSTATUS_REC));

mutex_spin_exit(&sc->sc_intr_lock);

return 1;
}

static int
fms_query_format(void *addr, audio_format_query_t *afp)
{

return audio_query_format(fms_formats, FMS_NFORMATS, afp);
}

/* Return index number of sample_rate */
static int
fms_rate2index(u_int sample_rate)
{
int i;

for (i = 0; i < fms_formats[0].frequency_type; i++) {
if (sample_rate == fms_formats[0].frequency[i])
return i;
}

/* NOTREACHED */
panic("fms_format.frequency mismatch?\n");
}

static int
fms_set_format(void *addr, int setmode,
const audio_params_t *play, const audio_params_t *rec,
audio_filter_reg_t *pfil, audio_filter_reg_t *rfil)
{
struct fms_softc *sc;

sc = addr;
if (setmode & AUMODE_PLAY) {
sc->sc_play_reg = fms_rate2index(play->sample_rate) << 8;
sc->sc_play_reg |= FM_PLAY_STEREO;
sc->sc_play_reg |= FM_PLAY_16BIT;
}

if (setmode & AUMODE_RECORD) {
sc->sc_rec_reg = fms_rate2index(rec->sample_rate) << 8;
sc->sc_rec_reg |= FM_REC_STEREO;
sc->sc_rec_reg |= FM_REC_16BIT;
}

return 0;
}

static int
fms_round_blocksize(void *addr, int blk, int mode,
const audio_params_t *param)
{

return blk & ~0xf;
}

static int
fms_halt_output(void *addr)
{
struct fms_softc *sc;
uint16_t k1;

sc = addr;
k1 = bus_space_read_2(sc->sc_iot, sc->sc_ioh, FM_PLAY_CTL);
bus_space_write_2(sc->sc_iot, sc->sc_ioh, FM_PLAY_CTL,
(k1 & ~(FM_PLAY_STOPNOW | FM_PLAY_START)) |
FM_PLAY_BUF1_LAST | FM_PLAY_BUF2_LAST);

return 0;
}

static int
fms_halt_input(void *addr)
{
struct fms_softc *sc;
uint16_t k1;

sc = addr;
k1 = bus_space_read_2(sc->sc_iot, sc->sc_ioh, FM_REC_CTL);
bus_space_write_2(sc->sc_iot, sc->sc_ioh, FM_REC_CTL,
(k1 & ~(FM_REC_STOPNOW | FM_REC_START)) |
FM_REC_BUF1_LAST | FM_REC_BUF2_LAST);

return 0;
}

static int
fms_getdev(void *addr, struct audio_device *retp)
{

*retp = fms_device;
return 0;
}

static int
fms_set_port(void *addr, mixer_ctrl_t *cp)
{
struct fms_softc *sc;

sc = addr;
return sc->codec_if->vtbl->mixer_set_port(sc->codec_if, cp);
}

static int
fms_get_port(void *addr, mixer_ctrl_t *cp)
{
struct fms_softc *sc;

sc = addr;
return sc->codec_if->vtbl->mixer_get_port(sc->codec_if, cp);
}

static void *
fms_malloc(void *addr, int direction, size_t size)
{
struct fms_softc *sc;
struct fms_dma *p;
int error;
int rseg;

sc = addr;
p = kmem_alloc(sizeof(*p), KM_SLEEP);
p->size = size;

if ((error = bus_dmamem_alloc(sc->sc_dmat, size, PAGE_SIZE, 0, &p->seg,
1, &rseg, BUS_DMA_WAITOK)) != 0) {
aprint_error_dev(sc->sc_dev, "unable to allocate DMA, error = %d\n", error);
goto fail_alloc;
}

if ((error = bus_dmamem_map(sc->sc_dmat, &p->seg, rseg, size, &p->addr,
BUS_DMA_WAITOK | BUS_DMA_COHERENT)) != 0) {
aprint_error_dev(sc->sc_dev, "unable to map DMA, error = %d\n",
error);
goto fail_map;
}

if ((error = bus_dmamap_create(sc->sc_dmat, size, 1, size, 0,
BUS_DMA_WAITOK, &p->map)) != 0) {
aprint_error_dev(sc->sc_dev, "unable to create DMA map, error = %d\n",
error);
goto fail_create;
}

if ((error = bus_dmamap_load(sc->sc_dmat, p->map, p->addr, size, NULL,
BUS_DMA_WAITOK)) != 0) {
aprint_error_dev(sc->sc_dev, "unable to load DMA map, error = %d\n",
error);
goto fail_load;
}

p->next = sc->sc_dmas;
sc->sc_dmas = p;

return p->addr;

fail_load:
bus_dmamap_destroy(sc->sc_dmat, p->map);
fail_create:
bus_dmamem_unmap(sc->sc_dmat, p->addr, size);
fail_map:
bus_dmamem_free(sc->sc_dmat, &p->seg, 1);
fail_alloc:
kmem_free(p, sizeof(*p));
return NULL;
}

static void
fms_free(void *addr, void *ptr, size_t size)
{
struct fms_softc *sc;
struct fms_dma **pp, *p;

sc = addr;
for (pp = &(sc->sc_dmas); (p = *pp) != NULL; pp = &p->next)
if (p->addr == ptr) {
bus_dmamap_unload(sc->sc_dmat, p->map);
bus_dmamap_destroy(sc->sc_dmat, p->map);
bus_dmamem_unmap(sc->sc_dmat, p->addr, p->size);
bus_dmamem_free(sc->sc_dmat, &p->seg, 1);

*pp = p->next;
kmem_free(p, sizeof(*p));
return;
}

panic("fms_free: trying to free unallocated memory");
}

static int
fms_get_props(void *addr)
{

return AUDIO_PROP_PLAYBACK | AUDIO_PROP_CAPTURE |
AUDIO_PROP_INDEPENDENT | AUDIO_PROP_FULLDUPLEX;
}

static int
fms_query_devinfo(void *addr, mixer_devinfo_t *dip)
{
struct fms_softc *sc;

sc = addr;
return sc->codec_if->vtbl->query_devinfo(sc->codec_if, dip);
}

static int
fms_trigger_output(void *addr, void *start, void *end, int blksize,
void (*intr)(void *), void *arg, const audio_params_t *param)
{
struct fms_softc *sc;
struct fms_dma *p;

sc = addr;
sc->sc_pintr = intr;
sc->sc_parg = arg;

for (p = sc->sc_dmas; p && p->addr != start; p = p->next)
continue;

if (p == NULL)
panic("fms_trigger_output: request with bad start "
"address (%p)", start);

sc->sc_play_start = p->map->dm_segs[0].ds_addr;
sc->sc_play_end = sc->sc_play_start + ((char *)end - (char *)start);
sc->sc_play_blksize = blksize;
sc->sc_play_nextblk = sc->sc_play_start + sc->sc_play_blksize;
sc->sc_play_flip = 0;
bus_space_write_2(sc->sc_iot, sc->sc_ioh, FM_PLAY_DMALEN, blksize - 1);
bus_space_write_4(sc->sc_iot, sc->sc_ioh, FM_PLAY_DMABUF1,
sc->sc_play_start);
bus_space_write_4(sc->sc_iot, sc->sc_ioh, FM_PLAY_DMABUF2,
sc->sc_play_nextblk);
bus_space_write_2(sc->sc_iot, sc->sc_ioh, FM_PLAY_CTL,
FM_PLAY_START | FM_PLAY_STOPNOW | sc->sc_play_reg);
return 0;
}

static int
fms_trigger_input(void *addr, void *start, void *end, int blksize,
void (*intr)(void *), void *arg, const audio_params_t *param)
{
struct fms_softc *sc;
struct fms_dma *p;

sc = addr;
sc->sc_rintr = intr;
sc->sc_rarg = arg;

for (p = sc->sc_dmas; p && p->addr != start; p = p->next)
continue;

if (p == NULL)
panic("fms_trigger_input: request with bad start "
"address (%p)", start);

sc->sc_rec_start = p->map->dm_segs[0].ds_addr;
sc->sc_rec_end = sc->sc_rec_start + ((char *)end - (char *)start);
sc->sc_rec_blksize = blksize;
sc->sc_rec_nextblk = sc->sc_rec_start + sc->sc_rec_blksize;
sc->sc_rec_flip = 0;
bus_space_write_2(sc->sc_iot, sc->sc_ioh, FM_REC_DMALEN, blksize - 1);
bus_space_write_4(sc->sc_iot, sc->sc_ioh, FM_REC_DMABUF1,
sc->sc_rec_start);
bus_space_write_4(sc->sc_iot, sc->sc_ioh, FM_REC_DMABUF2,
sc->sc_rec_nextblk);
bus_space_write_2(sc->sc_iot, sc->sc_ioh, FM_REC_CTL,
FM_REC_START | FM_REC_STOPNOW | sc->sc_rec_reg);
return 0;
}

static void
fms_get_locks(void *addr, kmutex_t **intr, kmutex_t **thread)
{
struct fms_softc *sc;

sc = addr;
*intr = &sc->sc_intr_lock;
*thread = &sc->sc_lock;
}