* Copyright (c) 2004, 2008 The NetBSD Foundation, Inc.

/* $NetBSD: auacer.c,v 1.39 2020/02/29 06:34:30 isaki Exp $ */

/*-
* Copyright (c) 2004, 2008 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Lennart Augustsson.
*
* 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.
*/

/*
* Acer Labs M5455 audio driver
*
* Acer provides data sheets after signing an NDA, so this is guess work.
* The chip behaves somewhat like the Intel i8x0, so this driver
* is loosely based on the auich driver. Additional information taken from
* the ALSA intel8x0.c driver (which handles M5455 as well).
*
* As an historical note one can observe that the auich driver borrows
* lot from the first NetBSD PCI audio driver, the eap driver. But this
* is not attributed anywhere.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: auacer.c,v 1.39 2020/02/29 06:34:30 isaki Exp $");

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

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

#include <sys/audioio.h>
#include <dev/audio/audio_if.h>

#include <sys/bus.h>

#include <dev/ic/ac97reg.h>
#include <dev/ic/ac97var.h>

struct auacer_dma {
bus_dmamap_t map;
void *addr;
bus_dma_segment_t segs[1];
int nsegs;
size_t size;
struct auacer_dma *next;
};

#define DMAADDR(p) ((p)->map->dm_segs[0].ds_addr)
#define KERNADDR(p) ((void *)((p)->addr))

struct auacer_cdata {
struct auacer_dmalist ic_dmalist_pcmo[ALI_DMALIST_MAX];
};

struct auacer_chan {
uint32_t ptr;
uint32_t start, p, end;
uint32_t blksize, fifoe;
uint32_t ack;
uint32_t port;
struct auacer_dmalist *dmalist;
void (*intr)(void *);
void *arg;
};

struct auacer_softc {
device_t sc_dev;
void *sc_ih;
kmutex_t sc_lock;
kmutex_t sc_intr_lock;

audio_device_t sc_audev;

bus_space_tag_t iot;
bus_space_handle_t mix_ioh;
bus_space_handle_t aud_ioh;
bus_dma_tag_t dmat;

struct ac97_codec_if *codec_if;
struct ac97_host_if host_if;

/* DMA scatter-gather lists. */
bus_dmamap_t sc_cddmamap;
#define sc_cddma sc_cddmamap->dm_segs[0].ds_addr

struct auacer_cdata *sc_cdata;

struct auacer_chan sc_pcmo;

struct auacer_dma *sc_dmas;

pci_chipset_tag_t sc_pc;
pcitag_t sc_pt;

int sc_dmamap_flags;

#define AUACER_NFORMATS 3
struct audio_format sc_formats[AUACER_NFORMATS];
};

#define READ1(sc, a) bus_space_read_1(sc->iot, sc->aud_ioh, a)
#define READ2(sc, a) bus_space_read_2(sc->iot, sc->aud_ioh, a)
#define READ4(sc, a) bus_space_read_4(sc->iot, sc->aud_ioh, a)
#define WRITE1(sc, a, v) bus_space_write_1(sc->iot, sc->aud_ioh, a, v)
#define WRITE2(sc, a, v) bus_space_write_2(sc->iot, sc->aud_ioh, a, v)
#define WRITE4(sc, a, v) bus_space_write_4(sc->iot, sc->aud_ioh, a, v)

/* Debug */
#ifdef AUACER_DEBUG
#define DPRINTF(l,x) do { if (auacer_debug & (l)) printf x; } while(0)
int auacer_debug = 0;
#define ALI_DEBUG_CODECIO 0x0001
#define ALI_DEBUG_DMA 0x0002
#define ALI_DEBUG_INTR 0x0004
#define ALI_DEBUG_API 0x0008
#define ALI_DEBUG_MIXERAPI 0x0010
#else
#define DPRINTF(x,y) /* nothing */
#endif

static int auacer_intr(void *);

static int auacer_query_format(void *, audio_format_query_t *);
static int auacer_set_format(void *, int,
const audio_params_t *, const audio_params_t *,
audio_filter_reg_t *, audio_filter_reg_t *);
static int auacer_halt_output(void *);
static int auacer_halt_input(void *);
static int auacer_getdev(void *, struct audio_device *);
static int auacer_set_port(void *, mixer_ctrl_t *);
static int auacer_get_port(void *, mixer_ctrl_t *);
static int auacer_query_devinfo(void *, mixer_devinfo_t *);
static void *auacer_allocm(void *, int, size_t);
static void auacer_freem(void *, void *, size_t);
static size_t auacer_round_buffersize(void *, int, size_t);
static int auacer_get_props(void *);
static int auacer_trigger_output(void *, void *, void *, int,
void (*)(void *), void *,
const audio_params_t *);
static int auacer_trigger_input(void *, void *, void *, int,
void (*)(void *), void *,
const audio_params_t *);

static int auacer_alloc_cdata(struct auacer_softc *);

static int auacer_allocmem(struct auacer_softc *, size_t, size_t,
struct auacer_dma *);
static int auacer_freemem(struct auacer_softc *, struct auacer_dma *);
static void auacer_get_locks(void *, kmutex_t **, kmutex_t **);

static bool auacer_resume(device_t, const pmf_qual_t *);
static int auacer_set_rate(struct auacer_softc *, int, u_int);

static void auacer_reset(struct auacer_softc *sc);

static const struct audio_hw_if auacer_hw_if = {
.query_format = auacer_query_format,
.set_format = auacer_set_format,
.halt_output = auacer_halt_output,
.halt_input = auacer_halt_input,
.getdev = auacer_getdev,
.set_port = auacer_set_port,
.get_port = auacer_get_port,
.query_devinfo = auacer_query_devinfo,
.allocm = auacer_allocm,
.freem = auacer_freem,
.round_buffersize = auacer_round_buffersize,
.get_props = auacer_get_props,
.trigger_output = auacer_trigger_output,
.trigger_input = auacer_trigger_input,
.get_locks = auacer_get_locks,
};

#define AUACER_FORMATS_4CH 1
#define AUACER_FORMATS_6CH 2
#define AUACER_FORMAT(aumode, ch, chmask) \
{ \
.mode = (aumode), \
.encoding = AUDIO_ENCODING_SLINEAR_LE, \
.validbits = 16, \
.precision = 16, \
.channels = (ch), \
.channel_mask = (chmask), \
.frequency_type = 9, \
.frequency = { 8000, 11025, 12000, 16000, 22050, \
24000, 32000, 44100, 48000, }, \
}
static const struct audio_format auacer_formats[AUACER_NFORMATS] = {
AUACER_FORMAT(AUMODE_PLAY | AUMODE_RECORD, 2, AUFMT_STEREO),
AUACER_FORMAT(AUMODE_PLAY , 4, AUFMT_SURROUND4),
AUACER_FORMAT(AUMODE_PLAY , 6, AUFMT_DOLBY_5_1),
};

static int auacer_attach_codec(void *, struct ac97_codec_if *);
static int auacer_read_codec(void *, uint8_t, uint16_t *);
static int auacer_write_codec(void *, uint8_t, uint16_t);
static int auacer_reset_codec(void *);

static int
auacer_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_ALI &&
PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_ALI_M5455)
return 1;
return 0;
}

static void
auacer_attach(device_t parent, device_t self, void *aux)
{
struct auacer_softc *sc;
struct pci_attach_args *pa;
pci_intr_handle_t ih;
bus_size_t aud_size;
pcireg_t v;
const char *intrstr;
int i;
char intrbuf[PCI_INTRSTR_LEN];

sc = device_private(self);
sc->sc_dev = self;
pa = aux;
aprint_normal(": Acer Labs M5455 Audio controller\n");

if (pci_mapreg_map(pa, 0x10, PCI_MAPREG_TYPE_IO, 0, &sc->iot,
&sc->aud_ioh, NULL, &aud_size)) {
aprint_error(": can't map i/o space\n");
return;
}

sc->sc_pc = pa->pa_pc;
sc->sc_pt = pa->pa_tag;
sc->dmat = pa->pa_dmat;

sc->sc_dmamap_flags = BUS_DMA_COHERENT; /* XXX remove */

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

/* enable bus mastering */
v = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
v | PCI_COMMAND_MASTER_ENABLE);

/* Map and establish the interrupt. */
if (pci_intr_map(pa, &ih)) {
aprint_error_dev(sc->sc_dev, "can't map interrupt\n");
mutex_destroy(&sc->sc_lock);
mutex_destroy(&sc->sc_intr_lock);
return;
}
intrstr = pci_intr_string(pa->pa_pc, ih, intrbuf, sizeof(intrbuf));
sc->sc_ih = pci_intr_establish_xname(pa->pa_pc, ih, IPL_AUDIO,
auacer_intr, sc, device_xname(self));
if (sc->sc_ih == NULL) {
aprint_error_dev(sc->sc_dev, "can'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;
}
aprint_normal_dev(sc->sc_dev, "interrupting at %s\n", intrstr);

strlcpy(sc->sc_audev.name, "M5455 AC97", MAX_AUDIO_DEV_LEN);
snprintf(sc->sc_audev.version, MAX_AUDIO_DEV_LEN,
"0x%02x", PCI_REVISION(pa->pa_class));
strlcpy(sc->sc_audev.config, device_xname(sc->sc_dev), MAX_AUDIO_DEV_LEN);

/* Set up DMA lists. */
auacer_alloc_cdata(sc);
sc->sc_pcmo.dmalist = sc->sc_cdata->ic_dmalist_pcmo;
sc->sc_pcmo.ptr = 0;
sc->sc_pcmo.port = ALI_BASE_PO;

DPRINTF(ALI_DEBUG_DMA, ("auacer_attach: lists %p\n",
sc->sc_pcmo.dmalist));

sc->host_if.arg = sc;
sc->host_if.attach = auacer_attach_codec;
sc->host_if.read = auacer_read_codec;
sc->host_if.write = auacer_write_codec;
sc->host_if.reset = auacer_reset_codec;

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

/* setup audio_format */
memcpy(sc->sc_formats, auacer_formats, sizeof(auacer_formats));
mutex_enter(&sc->sc_lock);
if (!AC97_IS_4CH(sc->codec_if))
AUFMT_INVALIDATE(&sc->sc_formats[AUACER_FORMATS_4CH]);
if (!AC97_IS_6CH(sc->codec_if))
AUFMT_INVALIDATE(&sc->sc_formats[AUACER_FORMATS_6CH]);
if (AC97_IS_FIXED_RATE(sc->codec_if)) {
for (i = 0; i < AUACER_NFORMATS; i++) {
sc->sc_formats[i].frequency_type = 1;
sc->sc_formats[i].frequency[0] = 48000;
}
}

mutex_spin_enter(&sc->sc_intr_lock);
auacer_reset(sc);
mutex_spin_exit(&sc->sc_intr_lock);
mutex_exit(&sc->sc_lock);

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

if (!pmf_device_register(self, NULL, auacer_resume))
aprint_error_dev(self, "couldn't establish power handler\n");
}

CFATTACH_DECL_NEW(auacer, sizeof(struct auacer_softc),
auacer_match, auacer_attach, NULL, NULL);

static int
auacer_ready_codec(struct auacer_softc *sc, int mask)
{
int count;

for (count = 0; count < 0x7f; count++) {
int val = READ1(sc, ALI_CSPSR);
if (val & mask)
return 0;
}

aprint_normal("auacer_ready_codec: AC97 codec ready timeout.\n");
return EBUSY;
}

static int
auacer_sema_codec(struct auacer_softc *sc)
{
int ttime;

ttime = 100;
while (ttime-- && (READ4(sc, ALI_CAS) & ALI_CAS_SEM_BUSY))
delay(1);
if (!ttime)
aprint_normal("auacer_sema_codec: timeout\n");
return auacer_ready_codec(sc, ALI_CSPSR_CODEC_READY);
}

static int
auacer_read_codec(void *v, uint8_t reg, uint16_t *val)
{
struct auacer_softc *sc;

sc = v;
if (auacer_sema_codec(sc))
return EIO;

reg |= ALI_CPR_ADDR_READ;
#if 0
if (ac97->num)
reg |= ALI_CPR_ADDR_SECONDARY;
#endif
WRITE2(sc, ALI_CPR_ADDR, reg);
if (auacer_ready_codec(sc, ALI_CSPSR_READ_OK))
return EIO;
*val = READ2(sc, ALI_SPR);

DPRINTF(ALI_DEBUG_CODECIO, ("auacer_read_codec: reg=0x%x val=0x%x\n",
reg, *val));

return 0;
}

int
auacer_write_codec(void *v, uint8_t reg, uint16_t val)
{
struct auacer_softc *sc;

DPRINTF(ALI_DEBUG_CODECIO, ("auacer_write_codec: reg=0x%x val=0x%x\n",
reg, val));
sc = v;
if (auacer_sema_codec(sc))
return EIO;
WRITE2(sc, ALI_CPR, val);
#if 0
if (ac97->num)
reg |= ALI_CPR_ADDR_SECONDARY;
#endif
WRITE2(sc, ALI_CPR_ADDR, reg);
auacer_ready_codec(sc, ALI_CSPSR_WRITE_OK);
return 0;
}

static int
auacer_attach_codec(void *v, struct ac97_codec_if *cif)
{
struct auacer_softc *sc;

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

static int
auacer_reset_codec(void *v)
{
struct auacer_softc *sc;
uint32_t reg;
int i;

sc = v;
i = 0;
reg = READ4(sc, ALI_SCR);
if ((reg & 2) == 0) /* Cold required */
reg |= 2;
else
reg |= 1; /* Warm */
reg &= ~0x80000000; /* ACLink on */
WRITE4(sc, ALI_SCR, reg);

while (i < 10) {
if ((READ4(sc, ALI_INTERRUPTSR) & ALI_INT_GPIO) == 0)
break;
delay(50000); /* XXX */
i++;
}
if (i == 10) {
return EIO;
}

for (i = 0; i < 10; i++) {
reg = READ4(sc, ALI_RTSR);
if (reg & 0x80) /* primary codec */
break;
WRITE4(sc, ALI_RTSR, reg | 0x80);
delay(50000); /* XXX */
}

return 0;
}

static void
auacer_reset(struct auacer_softc *sc)
{
WRITE4(sc, ALI_SCR, ALI_SCR_RESET);
WRITE4(sc, ALI_FIFOCR1, 0x83838383);
WRITE4(sc, ALI_FIFOCR2, 0x83838383);
WRITE4(sc, ALI_FIFOCR3, 0x83838383);
WRITE4(sc, ALI_INTERFACECR, ALI_IF_PO); /* XXX pcm out only */
WRITE4(sc, ALI_INTERRUPTCR, 0x00000000);
WRITE4(sc, ALI_INTERRUPTSR, 0x00000000);
}

static int
auacer_query_format(void *v, audio_format_query_t *afp)
{
struct auacer_softc *sc;

DPRINTF(ALI_DEBUG_API, ("%s\n", __func__));
sc = v;
return audio_query_format(sc->sc_formats, AUACER_NFORMATS, afp);
}

static int
auacer_set_rate(struct auacer_softc *sc, int mode, u_int srate)
{
int ret;
u_int ratetmp;

DPRINTF(ALI_DEBUG_API, ("auacer_set_rate: srate=%u\n", srate));

ratetmp = srate;
if (mode == AUMODE_RECORD)
return sc->codec_if->vtbl->set_rate(sc->codec_if,
AC97_REG_PCM_LR_ADC_RATE, &ratetmp);
ret = sc->codec_if->vtbl->set_rate(sc->codec_if,
AC97_REG_PCM_FRONT_DAC_RATE, &ratetmp);
if (ret)
return ret;
ratetmp = srate;
ret = sc->codec_if->vtbl->set_rate(sc->codec_if,
AC97_REG_PCM_SURR_DAC_RATE, &ratetmp);
if (ret)
return ret;
ratetmp = srate;
ret = sc->codec_if->vtbl->set_rate(sc->codec_if,
AC97_REG_PCM_LFE_DAC_RATE, &ratetmp);
return ret;
}

static int
auacer_set_format(void *v, int setmode,
const audio_params_t *play, const audio_params_t *rec,
audio_filter_reg_t *pfil, audio_filter_reg_t *rfil)
{
struct auacer_softc *sc;
const audio_params_t *p;
uint32_t control;
int mode, index;

DPRINTF(ALI_DEBUG_API, ("%s\n", __func__));
sc = v;
for (mode = AUMODE_RECORD; mode != -1;
mode = mode == AUMODE_RECORD ? AUMODE_PLAY : -1) {
if ((setmode & mode) == 0)
continue;

p = mode == AUMODE_PLAY ? play : rec;

index = audio_indexof_format(sc->sc_formats, AUACER_NFORMATS,
mode, p);
/* p points HW encoding */
if (sc->sc_formats[index].frequency_type != 1
&& auacer_set_rate(sc, mode, p->sample_rate))
return EINVAL;
if (mode == AUMODE_PLAY) {
control = READ4(sc, ALI_SCR);
control &= ~ALI_SCR_PCM_246_MASK;
if (p->channels == 4)
control |= ALI_SCR_PCM_4;
else if (p->channels == 6)
control |= ALI_SCR_PCM_6;
WRITE4(sc, ALI_SCR, control);
}
}

return 0;
}

static void
auacer_halt(struct auacer_softc *sc, struct auacer_chan *chan)
{
uint32_t val;
uint8_t port;
uint32_t slot;

port = chan->port;
DPRINTF(ALI_DEBUG_API, ("auacer_halt: port=0x%x\n", port));
chan->intr = 0;

slot = ALI_PORT2SLOT(port);

val = READ4(sc, ALI_DMACR);
val |= 1 << (slot+16); /* pause */
val &= ~(1 << slot); /* no start */
WRITE4(sc, ALI_DMACR, val);
WRITE1(sc, port + ALI_OFF_CR, 0);
while (READ1(sc, port + ALI_OFF_CR))
;
/* reset whole DMA things */
WRITE1(sc, port + ALI_OFF_CR, ALI_CR_RR);
/* clear interrupts */
WRITE1(sc, port + ALI_OFF_SR, READ1(sc, port+ALI_OFF_SR) | ALI_SR_W1TC);
WRITE4(sc, ALI_INTERRUPTSR, ALI_PORT2INTR(port));
}

static int
auacer_halt_output(void *v)
{
struct auacer_softc *sc;

DPRINTF(ALI_DEBUG_DMA, ("auacer_halt_output\n"));
sc = v;
auacer_halt(sc, &sc->sc_pcmo);

return 0;
}

static int
auacer_halt_input(void *v)
{
DPRINTF(ALI_DEBUG_DMA, ("auacer_halt_input\n"));

return 0;
}

static int
auacer_getdev(void *v, struct audio_device *adp)
{
struct auacer_softc *sc;

DPRINTF(ALI_DEBUG_API, ("auacer_getdev\n"));
sc = v;
*adp = sc->sc_audev;
return 0;
}

static int
auacer_set_port(void *v, mixer_ctrl_t *cp)
{
struct auacer_softc *sc;

DPRINTF(ALI_DEBUG_MIXERAPI, ("auacer_set_port\n"));
sc = v;
return sc->codec_if->vtbl->mixer_set_port(sc->codec_if, cp);
}

static int
auacer_get_port(void *v, mixer_ctrl_t *cp)
{
struct auacer_softc *sc;

DPRINTF(ALI_DEBUG_MIXERAPI, ("auacer_get_port\n"));
sc = v;
return sc->codec_if->vtbl->mixer_get_port(sc->codec_if, cp);
}

static int
auacer_query_devinfo(void *v, mixer_devinfo_t *dp)
{
struct auacer_softc *sc;

DPRINTF(ALI_DEBUG_MIXERAPI, ("auacer_query_devinfo\n"));
sc = v;
return sc->codec_if->vtbl->query_devinfo(sc->codec_if, dp);
}

static void *
auacer_allocm(void *v, int direction, size_t size)
{
struct auacer_softc *sc;
struct auacer_dma *p;
int error;

if (size > (ALI_DMALIST_MAX * ALI_DMASEG_MAX))
return NULL;

p = kmem_zalloc(sizeof(*p), KM_SLEEP);
sc = v;
error = auacer_allocmem(sc, size, 0, p);
if (error) {
kmem_free(p, sizeof(*p));
return NULL;
}

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

return KERNADDR(p);
}

static void
auacer_freem(void *v, void *ptr, size_t size)
{
struct auacer_softc *sc;
struct auacer_dma *p, **pp;

sc = v;
for (pp = &sc->sc_dmas; (p = *pp) != NULL; pp = &p->next) {
if (KERNADDR(p) == ptr) {
auacer_freemem(sc, p);
*pp = p->next;
kmem_free(p, sizeof(*p));
return;
}
}
}

static size_t
auacer_round_buffersize(void *v, int direction, size_t size)
{

if (size > (ALI_DMALIST_MAX * ALI_DMASEG_MAX))
size = ALI_DMALIST_MAX * ALI_DMASEG_MAX;

return size;
}

static int
auacer_get_props(void *v)
{

return AUDIO_PROP_PLAYBACK | AUDIO_PROP_CAPTURE |
AUDIO_PROP_INDEPENDENT | AUDIO_PROP_FULLDUPLEX;
}

static void
auacer_get_locks(void *v, kmutex_t **intr, kmutex_t **proc)
{
struct auacer_softc *sc;

sc = v;
*intr = &sc->sc_intr_lock;
*proc = &sc->sc_lock;
}

static void
auacer_add_entry(struct auacer_chan *chan)
{
struct auacer_dmalist *q;

q = &chan->dmalist[chan->ptr];

DPRINTF(ALI_DEBUG_INTR,
("auacer_add_entry: %p = %x @ 0x%x\n",
q, chan->blksize / 2, chan->p));

q->base = htole32(chan->p);
q->len = htole32((chan->blksize / ALI_SAMPLE_SIZE) | ALI_DMAF_IOC);
chan->p += chan->blksize;
if (chan->p >= chan->end)
chan->p = chan->start;

if (++chan->ptr >= ALI_DMALIST_MAX)
chan->ptr = 0;
}

static void
auacer_upd_chan(struct auacer_softc *sc, struct auacer_chan *chan)
{
uint32_t sts;
uint32_t civ;

sts = READ2(sc, chan->port + ALI_OFF_SR);
/* intr ack */
WRITE2(sc, chan->port + ALI_OFF_SR, sts & ALI_SR_W1TC);
WRITE4(sc, ALI_INTERRUPTSR, ALI_PORT2INTR(chan->port));

DPRINTF(ALI_DEBUG_INTR, ("auacer_upd_chan: sts=0x%x\n", sts));

if (sts & ALI_SR_DMA_INT_FIFO) {
printf("%s: fifo underrun # %u\n",
device_xname(sc->sc_dev), ++chan->fifoe);
}

civ = READ1(sc, chan->port + ALI_OFF_CIV);

DPRINTF(ALI_DEBUG_INTR,("auacer_intr: civ=%u ptr=%u\n",civ,chan->ptr));

/* XXX */
while (chan->ptr != civ) {
auacer_add_entry(chan);
}

WRITE1(sc, chan->port + ALI_OFF_LVI, (chan->ptr - 1) & ALI_LVI_MASK);

while (chan->ack != civ) {
if (chan->intr) {
DPRINTF(ALI_DEBUG_INTR,("auacer_upd_chan: callback\n"));
chan->intr(chan->arg);
}
chan->ack++;
if (chan->ack >= ALI_DMALIST_MAX)
chan->ack = 0;
}
}

static int
auacer_intr(void *v)
{
struct auacer_softc *sc;
int ret, intrs;

sc = v;

DPRINTF(ALI_DEBUG_INTR, ("auacer_intr: intrs=0x%x\n",
READ4(sc, ALI_INTERRUPTSR)));

mutex_spin_enter(&sc->sc_intr_lock);
intrs = READ4(sc, ALI_INTERRUPTSR);
ret = 0;
if (intrs & ALI_INT_PCMOUT) {
auacer_upd_chan(sc, &sc->sc_pcmo);
ret++;
}
mutex_spin_exit(&sc->sc_intr_lock);

return ret != 0;
}

static void
auacer_setup_chan(struct auacer_softc *sc, struct auacer_chan *chan,
uint32_t start, uint32_t size, uint32_t blksize,
void (*intr)(void *), void *arg)
{
uint32_t port, slot;
uint32_t offs, val;

chan->start = start;
chan->ptr = 0;
chan->p = chan->start;
chan->end = chan->start + size;
chan->blksize = blksize;
chan->ack = 0;
chan->intr = intr;
chan->arg = arg;

auacer_add_entry(chan);
auacer_add_entry(chan);

port = chan->port;
slot = ALI_PORT2SLOT(port);

WRITE1(sc, port + ALI_OFF_CIV, 0);
WRITE1(sc, port + ALI_OFF_LVI, (chan->ptr - 1) & ALI_LVI_MASK);
offs = (char *)chan->dmalist - (char *)sc->sc_cdata;
WRITE4(sc, port + ALI_OFF_BDBAR, sc->sc_cddma + offs);
WRITE1(sc, port + ALI_OFF_CR,
ALI_CR_IOCE | ALI_CR_FEIE | ALI_CR_LVBIE | ALI_CR_RPBM);
val = READ4(sc, ALI_DMACR);
val &= ~(1 << (slot+16)); /* no pause */
val |= 1 << slot; /* start */
WRITE4(sc, ALI_DMACR, val);
}

static int
auacer_trigger_output(void *v, void *start, void *end, int blksize,
void (*intr)(void *), void *arg, const audio_params_t *param)
{
struct auacer_softc *sc;
struct auacer_dma *p;
uint32_t size;

DPRINTF(ALI_DEBUG_DMA,
("auacer_trigger_output(%p, %p, %d, %p, %p, %p)\n",
start, end, blksize, intr, arg, param));
sc = v;
for (p = sc->sc_dmas; p && KERNADDR(p) != start; p = p->next)
continue;
if (!p) {
printf("auacer_trigger_output: bad addr %p\n", start);
return (EINVAL);
}

size = (char *)end - (char *)start;
auacer_setup_chan(sc, &sc->sc_pcmo, DMAADDR(p), size, blksize,
intr, arg);

return 0;
}

static int
auacer_trigger_input(void *v, void *start, void *end,
int blksize, void (*intr)(void *), void *arg,
const audio_params_t *param)
{
return EINVAL;
}

static int
auacer_allocmem(struct auacer_softc *sc, size_t size, size_t align,
struct auacer_dma *p)
{
int error;

p->size = size;
error = bus_dmamem_alloc(sc->dmat, p->size, align, 0,
p->segs, sizeof(p->segs)/sizeof(p->segs[0]),
&p->nsegs, BUS_DMA_WAITOK);
if (error)
return error;

error = bus_dmamem_map(sc->dmat, p->segs, p->nsegs, p->size,
&p->addr, BUS_DMA_WAITOK|sc->sc_dmamap_flags);
if (error)
goto free;

error = bus_dmamap_create(sc->dmat, p->size, 1, p->size,
0, BUS_DMA_WAITOK, &p->map);
if (error)
goto unmap;

error = bus_dmamap_load(sc->dmat, p->map, p->addr, p->size, NULL,
BUS_DMA_WAITOK);
if (error)
goto destroy;
return (0);

destroy:
bus_dmamap_destroy(sc->dmat, p->map);
unmap:
bus_dmamem_unmap(sc->dmat, p->addr, p->size);
free:
bus_dmamem_free(sc->dmat, p->segs, p->nsegs);
return error;
}

static int
auacer_freemem(struct auacer_softc *sc, struct auacer_dma *p)
{

bus_dmamap_unload(sc->dmat, p->map);
bus_dmamap_destroy(sc->dmat, p->map);
bus_dmamem_unmap(sc->dmat, p->addr, p->size);
bus_dmamem_free(sc->dmat, p->segs, p->nsegs);
return 0;
}

static int
auacer_alloc_cdata(struct auacer_softc *sc)
{
bus_dma_segment_t seg;
int error, rseg;

/*
* Allocate the control data structure, and create and load the
* DMA map for it.
*/
if ((error = bus_dmamem_alloc(sc->dmat,
sizeof(struct auacer_cdata),
PAGE_SIZE, 0, &seg, 1, &rseg, 0)) != 0) {
aprint_error_dev(sc->sc_dev, "unable to allocate control data, error = %d\n",
error);
goto fail_0;
}

if ((error = bus_dmamem_map(sc->dmat, &seg, rseg,
sizeof(struct auacer_cdata),
(void **) &sc->sc_cdata,
sc->sc_dmamap_flags)) != 0) {
aprint_error_dev(sc->sc_dev, "unable to map control data, error = %d\n",
error);
goto fail_1;
}

if ((error = bus_dmamap_create(sc->dmat, sizeof(struct auacer_cdata), 1,
sizeof(struct auacer_cdata), 0, 0,
&sc->sc_cddmamap)) != 0) {
aprint_error_dev(sc->sc_dev, "unable to create control data DMA map, "
"error = %d\n", error);
goto fail_2;
}

if ((error = bus_dmamap_load(sc->dmat, sc->sc_cddmamap,
sc->sc_cdata, sizeof(struct auacer_cdata),
NULL, 0)) != 0) {
aprint_error_dev(sc->sc_dev, "unable to load control data DMA map, "
"error = %d\n", error);
goto fail_3;
}

return 0;

fail_3:
bus_dmamap_destroy(sc->dmat, sc->sc_cddmamap);
fail_2:
bus_dmamem_unmap(sc->dmat, (void *) sc->sc_cdata,
sizeof(struct auacer_cdata));
fail_1:
bus_dmamem_free(sc->dmat, &seg, rseg);
fail_0:
return error;
}

static bool
auacer_resume(device_t dv, const pmf_qual_t *qual)
{
struct auacer_softc *sc = device_private(dv);

mutex_enter(&sc->sc_lock);
mutex_spin_enter(&sc->sc_intr_lock);
auacer_reset_codec(sc);
mutex_spin_exit(&sc->sc_intr_lock);
delay(1000);
sc->codec_if->vtbl->restore_ports(sc->codec_if);
mutex_exit(&sc->sc_lock);

return true;
}