| Current Path : /sys/dev/sound/pci/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/dev/sound/pci/via82c686.c |
/*-
* Copyright (c) 2000 David Jones <dej@ox.org>
* 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.
*
* 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.
*/
#ifdef HAVE_KERNEL_OPTION_HEADERS
#include "opt_snd.h"
#endif
#include <dev/sound/pcm/sound.h>
#include <dev/sound/pcm/ac97.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <sys/sysctl.h>
#include <dev/sound/pci/via82c686.h>
SND_DECLARE_FILE("$FreeBSD: release/9.1.0/sys/dev/sound/pci/via82c686.c 193640 2009-06-07 19:12:08Z ariff $");
#define VIA_PCI_ID 0x30581106
#define NSEGS 4 /* Number of segments in SGD table */
#define SEGS_PER_CHAN (NSEGS/2)
#define TIMEOUT 50
#define VIA_DEFAULT_BUFSZ 0x1000
#undef DEB
#define DEB(x)
/* we rely on this struct being packed to 64 bits */
struct via_dma_op {
u_int32_t ptr;
u_int32_t flags;
#define VIA_DMAOP_EOL 0x80000000
#define VIA_DMAOP_FLAG 0x40000000
#define VIA_DMAOP_STOP 0x20000000
#define VIA_DMAOP_COUNT(x) ((x)&0x00FFFFFF)
};
struct via_info;
struct via_chinfo {
struct via_info *parent;
struct pcm_channel *channel;
struct snd_dbuf *buffer;
struct via_dma_op *sgd_table;
bus_addr_t sgd_addr;
int dir, blksz;
int base, count, mode, ctrl;
};
struct via_info {
bus_space_tag_t st;
bus_space_handle_t sh;
bus_dma_tag_t parent_dmat;
bus_dma_tag_t sgd_dmat;
bus_dmamap_t sgd_dmamap;
bus_addr_t sgd_addr;
struct resource *reg, *irq;
int regid, irqid;
void *ih;
struct ac97_info *codec;
unsigned int bufsz;
struct via_chinfo pch, rch;
struct via_dma_op *sgd_table;
u_int16_t codec_caps;
struct mtx *lock;
};
static u_int32_t via_fmt[] = {
SND_FORMAT(AFMT_U8, 1, 0),
SND_FORMAT(AFMT_U8, 2, 0),
SND_FORMAT(AFMT_S16_LE, 1, 0),
SND_FORMAT(AFMT_S16_LE, 2, 0),
0
};
static struct pcmchan_caps via_vracaps = {4000, 48000, via_fmt, 0};
static struct pcmchan_caps via_caps = {48000, 48000, via_fmt, 0};
static __inline u_int32_t
via_rd(struct via_info *via, int regno, int size)
{
switch (size) {
case 1:
return bus_space_read_1(via->st, via->sh, regno);
case 2:
return bus_space_read_2(via->st, via->sh, regno);
case 4:
return bus_space_read_4(via->st, via->sh, regno);
default:
return 0xFFFFFFFF;
}
}
static __inline void
via_wr(struct via_info *via, int regno, u_int32_t data, int size)
{
switch (size) {
case 1:
bus_space_write_1(via->st, via->sh, regno, data);
break;
case 2:
bus_space_write_2(via->st, via->sh, regno, data);
break;
case 4:
bus_space_write_4(via->st, via->sh, regno, data);
break;
}
}
/* -------------------------------------------------------------------- */
/* Codec interface */
static int
via_waitready_codec(struct via_info *via)
{
int i;
/* poll until codec not busy */
for (i = 0; (i < TIMEOUT) &&
(via_rd(via, VIA_CODEC_CTL, 4) & VIA_CODEC_BUSY); i++)
DELAY(1);
if (i >= TIMEOUT) {
printf("via: codec busy\n");
return 1;
}
return 0;
}
static int
via_waitvalid_codec(struct via_info *via)
{
int i;
/* poll until codec valid */
for (i = 0; (i < TIMEOUT) &&
!(via_rd(via, VIA_CODEC_CTL, 4) & VIA_CODEC_PRIVALID); i++)
DELAY(1);
if (i >= TIMEOUT) {
printf("via: codec invalid\n");
return 1;
}
return 0;
}
static int
via_write_codec(kobj_t obj, void *addr, int reg, u_int32_t val)
{
struct via_info *via = addr;
if (via_waitready_codec(via)) return -1;
via_wr(via, VIA_CODEC_CTL, VIA_CODEC_PRIVALID | VIA_CODEC_INDEX(reg) | val, 4);
return 0;
}
static int
via_read_codec(kobj_t obj, void *addr, int reg)
{
struct via_info *via = addr;
if (via_waitready_codec(via))
return -1;
via_wr(via, VIA_CODEC_CTL, VIA_CODEC_PRIVALID | VIA_CODEC_READ | VIA_CODEC_INDEX(reg),4);
if (via_waitready_codec(via))
return -1;
if (via_waitvalid_codec(via))
return -1;
return via_rd(via, VIA_CODEC_CTL, 2);
}
static kobj_method_t via_ac97_methods[] = {
KOBJMETHOD(ac97_read, via_read_codec),
KOBJMETHOD(ac97_write, via_write_codec),
KOBJMETHOD_END
};
AC97_DECLARE(via_ac97);
/* -------------------------------------------------------------------- */
static int
via_buildsgdt(struct via_chinfo *ch)
{
u_int32_t phys_addr, flag;
int i, segs, seg_size;
/*
* Build the scatter/gather DMA (SGD) table.
* There are four slots in the table: two for play, two for record.
* This creates two half-buffers, one of which is playing; the other
* is feeding.
*/
seg_size = ch->blksz;
segs = sndbuf_getsize(ch->buffer) / seg_size;
phys_addr = sndbuf_getbufaddr(ch->buffer);
for (i = 0; i < segs; i++) {
flag = (i == segs - 1)? VIA_DMAOP_EOL : VIA_DMAOP_FLAG;
ch->sgd_table[i].ptr = phys_addr + (i * seg_size);
ch->sgd_table[i].flags = flag | seg_size;
}
return 0;
}
/* channel interface */
static void *
viachan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
{
struct via_info *via = devinfo;
struct via_chinfo *ch;
snd_mtxlock(via->lock);
if (dir == PCMDIR_PLAY) {
ch = &via->pch;
ch->base = VIA_PLAY_DMAOPS_BASE;
ch->count = VIA_PLAY_DMAOPS_COUNT;
ch->ctrl = VIA_PLAY_CONTROL;
ch->mode = VIA_PLAY_MODE;
ch->sgd_addr = via->sgd_addr;
ch->sgd_table = &via->sgd_table[0];
} else {
ch = &via->rch;
ch->base = VIA_RECORD_DMAOPS_BASE;
ch->count = VIA_RECORD_DMAOPS_COUNT;
ch->ctrl = VIA_RECORD_CONTROL;
ch->mode = VIA_RECORD_MODE;
ch->sgd_addr = via->sgd_addr + sizeof(struct via_dma_op) * SEGS_PER_CHAN;
ch->sgd_table = &via->sgd_table[SEGS_PER_CHAN];
}
ch->parent = via;
ch->channel = c;
ch->buffer = b;
ch->dir = dir;
snd_mtxunlock(via->lock);
if (sndbuf_alloc(ch->buffer, via->parent_dmat, 0, via->bufsz) != 0)
return NULL;
return ch;
}
static int
viachan_setformat(kobj_t obj, void *data, u_int32_t format)
{
struct via_chinfo *ch = data;
struct via_info *via = ch->parent;
int mode, mode_set;
mode_set = 0;
if (AFMT_CHANNEL(format) > 1)
mode_set |= VIA_RPMODE_STEREO;
if (format & AFMT_S16_LE)
mode_set |= VIA_RPMODE_16BIT;
DEB(printf("set format: dir = %d, format=%x\n", ch->dir, format));
snd_mtxlock(via->lock);
mode = via_rd(via, ch->mode, 1);
mode &= ~(VIA_RPMODE_16BIT | VIA_RPMODE_STEREO);
mode |= mode_set;
via_wr(via, ch->mode, mode, 1);
snd_mtxunlock(via->lock);
return 0;
}
static u_int32_t
viachan_setspeed(kobj_t obj, void *data, u_int32_t speed)
{
struct via_chinfo *ch = data;
struct via_info *via = ch->parent;
int reg;
/*
* Basic AC'97 defines a 48 kHz sample rate only. For other rates,
* upsampling is required.
*
* The VT82C686A does not perform upsampling, and neither do we.
* If the codec supports variable-rate audio (i.e. does the upsampling
* itself), then negotiate the rate with the codec. Otherwise,
* return 48 kHz cuz that's all you got.
*/
if (via->codec_caps & AC97_EXTCAP_VRA) {
reg = (ch->dir == PCMDIR_PLAY)? AC97_REGEXT_FDACRATE : AC97_REGEXT_LADCRATE;
return ac97_setrate(via->codec, reg, speed);
} else
return 48000;
}
static u_int32_t
viachan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
{
struct via_chinfo *ch = data;
ch->blksz = blocksize;
sndbuf_resize(ch->buffer, SEGS_PER_CHAN, ch->blksz);
return ch->blksz;
}
static int
viachan_trigger(kobj_t obj, void *data, int go)
{
struct via_chinfo *ch = data;
struct via_info *via = ch->parent;
struct via_dma_op *ado;
bus_addr_t sgd_addr = ch->sgd_addr;
if (!PCMTRIG_COMMON(go))
return 0;
ado = ch->sgd_table;
DEB(printf("ado located at va=%p pa=%x\n", ado, sgd_addr));
snd_mtxlock(via->lock);
if (go == PCMTRIG_START) {
via_buildsgdt(ch);
via_wr(via, ch->base, sgd_addr, 4);
via_wr(via, ch->ctrl, VIA_RPCTRL_START, 1);
} else
via_wr(via, ch->ctrl, VIA_RPCTRL_TERMINATE, 1);
snd_mtxunlock(via->lock);
DEB(printf("viachan_trigger: go=%d\n", go));
return 0;
}
static u_int32_t
viachan_getptr(kobj_t obj, void *data)
{
struct via_chinfo *ch = data;
struct via_info *via = ch->parent;
struct via_dma_op *ado;
bus_addr_t sgd_addr = ch->sgd_addr;
u_int32_t ptr, base, base1, len, seg;
ado = ch->sgd_table;
snd_mtxlock(via->lock);
base1 = via_rd(via, ch->base, 4);
len = via_rd(via, ch->count, 4);
base = via_rd(via, ch->base, 4);
if (base != base1) /* Avoid race hazard */
len = via_rd(via, ch->count, 4);
snd_mtxunlock(via->lock);
DEB(printf("viachan_getptr: len / base = %x / %x\n", len, base));
/* Base points to SGD segment to do, one past current */
/* Determine how many segments have been done */
seg = (base - sgd_addr) / sizeof(struct via_dma_op);
if (seg == 0)
seg = SEGS_PER_CHAN;
/* Now work out offset: seg less count */
ptr = (seg * sndbuf_getsize(ch->buffer) / SEGS_PER_CHAN) - len;
if (ch->dir == PCMDIR_REC) {
/* DMA appears to operate on memory 'lines' of 32 bytes */
/* so don't return any part line - it isn't in RAM yet */
ptr = ptr & ~0x1f;
}
DEB(printf("return ptr=%u\n", ptr));
return ptr;
}
static struct pcmchan_caps *
viachan_getcaps(kobj_t obj, void *data)
{
struct via_chinfo *ch = data;
struct via_info *via = ch->parent;
return (via->codec_caps & AC97_EXTCAP_VRA)? &via_vracaps : &via_caps;
}
static kobj_method_t viachan_methods[] = {
KOBJMETHOD(channel_init, viachan_init),
KOBJMETHOD(channel_setformat, viachan_setformat),
KOBJMETHOD(channel_setspeed, viachan_setspeed),
KOBJMETHOD(channel_setblocksize, viachan_setblocksize),
KOBJMETHOD(channel_trigger, viachan_trigger),
KOBJMETHOD(channel_getptr, viachan_getptr),
KOBJMETHOD(channel_getcaps, viachan_getcaps),
KOBJMETHOD_END
};
CHANNEL_DECLARE(viachan);
/* -------------------------------------------------------------------- */
static void
via_intr(void *p)
{
struct via_info *via = p;
/* DEB(printf("viachan_intr\n")); */
/* Read channel */
snd_mtxlock(via->lock);
if (via_rd(via, VIA_PLAY_STAT, 1) & VIA_RPSTAT_INTR) {
via_wr(via, VIA_PLAY_STAT, VIA_RPSTAT_INTR, 1);
snd_mtxunlock(via->lock);
chn_intr(via->pch.channel);
snd_mtxlock(via->lock);
}
/* Write channel */
if (via_rd(via, VIA_RECORD_STAT, 1) & VIA_RPSTAT_INTR) {
via_wr(via, VIA_RECORD_STAT, VIA_RPSTAT_INTR, 1);
snd_mtxunlock(via->lock);
chn_intr(via->rch.channel);
return;
}
snd_mtxunlock(via->lock);
}
/*
* Probe and attach the card
*/
static int
via_probe(device_t dev)
{
if (pci_get_devid(dev) == VIA_PCI_ID) {
device_set_desc(dev, "VIA VT82C686A");
return BUS_PROBE_DEFAULT;
}
return ENXIO;
}
static void
dma_cb(void *p, bus_dma_segment_t *bds, int a, int b)
{
struct via_info *via = (struct via_info *)p;
via->sgd_addr = bds->ds_addr;
}
static int
via_attach(device_t dev)
{
struct via_info *via = 0;
char status[SND_STATUSLEN];
u_int32_t data, cnt;
via = malloc(sizeof(*via), M_DEVBUF, M_WAITOK | M_ZERO);
via->lock = snd_mtxcreate(device_get_nameunit(dev),
"snd_via82c686 softc");
/* Get resources */
data = pci_read_config(dev, PCIR_COMMAND, 2);
data |= (PCIM_CMD_PORTEN | PCIM_CMD_BUSMASTEREN);
pci_write_config(dev, PCIR_COMMAND, data, 2);
data = pci_read_config(dev, PCIR_COMMAND, 2);
/* Wake up and reset AC97 if necessary */
data = pci_read_config(dev, VIA_AC97STATUS, 1);
if ((data & VIA_AC97STATUS_RDY) == 0) {
/* Cold reset per ac97r2.3 spec (page 95) */
pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Assert low */
DELAY(100); /* Wait T_rst_low */
pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN | VIA_ACLINK_NRST, 1); /* Assert high */
DELAY(5); /* Wait T_rst2clk */
pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Assert low */
} else {
/* Warm reset */
pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Force no sync */
DELAY(100);
pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN | VIA_ACLINK_SYNC, 1); /* Sync */
DELAY(5); /* Wait T_sync_high */
pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Force no sync */
DELAY(5); /* Wait T_sync2clk */
}
/* Power everything up */
pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_DESIRED, 1);
/* Wait for codec to become ready (largest reported delay here 310ms) */
for (cnt = 0; cnt < 2000; cnt++) {
data = pci_read_config(dev, VIA_AC97STATUS, 1);
if (data & VIA_AC97STATUS_RDY)
break;
DELAY(5000);
}
via->regid = PCIR_BAR(0);
via->reg = bus_alloc_resource_any(dev, SYS_RES_IOPORT,
&via->regid, RF_ACTIVE);
if (!via->reg) {
device_printf(dev, "cannot allocate bus resource.");
goto bad;
}
via->st = rman_get_bustag(via->reg);
via->sh = rman_get_bushandle(via->reg);
via->bufsz = pcm_getbuffersize(dev, 4096, VIA_DEFAULT_BUFSZ, 65536);
via->irqid = 0;
via->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &via->irqid,
RF_ACTIVE | RF_SHAREABLE);
if (!via->irq || snd_setup_intr(dev, via->irq, INTR_MPSAFE, via_intr, via, &via->ih)) {
device_printf(dev, "unable to map interrupt\n");
goto bad;
}
via_wr(via, VIA_PLAY_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1);
via_wr(via, VIA_RECORD_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1);
via->codec = AC97_CREATE(dev, via, via_ac97);
if (!via->codec)
goto bad;
if (mixer_init(dev, ac97_getmixerclass(), via->codec))
goto bad;
via->codec_caps = ac97_getextcaps(via->codec);
ac97_setextmode(via->codec,
via->codec_caps & (AC97_EXTCAP_VRA | AC97_EXTCAP_VRM));
/* DMA tag for buffers */
if (bus_dma_tag_create(/*parent*/bus_get_dma_tag(dev), /*alignment*/2,
/*boundary*/0,
/*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
/*highaddr*/BUS_SPACE_MAXADDR,
/*filter*/NULL, /*filterarg*/NULL,
/*maxsize*/via->bufsz, /*nsegments*/1, /*maxsegz*/0x3ffff,
/*flags*/0, /*lockfunc*/NULL,
/*lockarg*/NULL, &via->parent_dmat) != 0) {
device_printf(dev, "unable to create dma tag\n");
goto bad;
}
/*
* DMA tag for SGD table. The 686 uses scatter/gather DMA and
* requires a list in memory of work to do. We need only 16 bytes
* for this list, and it is wasteful to allocate 16K.
*/
if (bus_dma_tag_create(/*parent*/bus_get_dma_tag(dev), /*alignment*/2,
/*boundary*/0,
/*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
/*highaddr*/BUS_SPACE_MAXADDR,
/*filter*/NULL, /*filterarg*/NULL,
/*maxsize*/NSEGS * sizeof(struct via_dma_op),
/*nsegments*/1, /*maxsegz*/0x3ffff,
/*flags*/0, /*lockfunc*/NULL,
/*lockarg*/NULL, &via->sgd_dmat) != 0) {
device_printf(dev, "unable to create dma tag\n");
goto bad;
}
if (bus_dmamem_alloc(via->sgd_dmat, (void **)&via->sgd_table,
BUS_DMA_NOWAIT, &via->sgd_dmamap) != 0)
goto bad;
if (bus_dmamap_load(via->sgd_dmat, via->sgd_dmamap, via->sgd_table,
NSEGS * sizeof(struct via_dma_op), dma_cb, via, 0) != 0)
goto bad;
snprintf(status, SND_STATUSLEN, "at io 0x%lx irq %ld %s",
rman_get_start(via->reg), rman_get_start(via->irq),
PCM_KLDSTRING(snd_via82c686));
/* Register */
if (pcm_register(dev, via, 1, 1)) goto bad;
pcm_addchan(dev, PCMDIR_PLAY, &viachan_class, via);
pcm_addchan(dev, PCMDIR_REC, &viachan_class, via);
pcm_setstatus(dev, status);
return 0;
bad:
if (via->codec) ac97_destroy(via->codec);
if (via->reg) bus_release_resource(dev, SYS_RES_IOPORT, via->regid, via->reg);
if (via->ih) bus_teardown_intr(dev, via->irq, via->ih);
if (via->irq) bus_release_resource(dev, SYS_RES_IRQ, via->irqid, via->irq);
if (via->parent_dmat) bus_dma_tag_destroy(via->parent_dmat);
if (via->sgd_dmamap) bus_dmamap_unload(via->sgd_dmat, via->sgd_dmamap);
if (via->sgd_table) bus_dmamem_free(via->sgd_dmat, via->sgd_table, via->sgd_dmamap);
if (via->sgd_dmat) bus_dma_tag_destroy(via->sgd_dmat);
if (via->lock) snd_mtxfree(via->lock);
if (via) free(via, M_DEVBUF);
return ENXIO;
}
static int
via_detach(device_t dev)
{
int r;
struct via_info *via = 0;
r = pcm_unregister(dev);
if (r)
return r;
via = pcm_getdevinfo(dev);
bus_release_resource(dev, SYS_RES_IOPORT, via->regid, via->reg);
bus_teardown_intr(dev, via->irq, via->ih);
bus_release_resource(dev, SYS_RES_IRQ, via->irqid, via->irq);
bus_dma_tag_destroy(via->parent_dmat);
bus_dmamap_unload(via->sgd_dmat, via->sgd_dmamap);
bus_dmamem_free(via->sgd_dmat, via->sgd_table, via->sgd_dmamap);
bus_dma_tag_destroy(via->sgd_dmat);
snd_mtxfree(via->lock);
free(via, M_DEVBUF);
return 0;
}
static device_method_t via_methods[] = {
DEVMETHOD(device_probe, via_probe),
DEVMETHOD(device_attach, via_attach),
DEVMETHOD(device_detach, via_detach),
{ 0, 0}
};
static driver_t via_driver = {
"pcm",
via_methods,
PCM_SOFTC_SIZE,
};
DRIVER_MODULE(snd_via82c686, pci, via_driver, pcm_devclass, 0, 0);
MODULE_DEPEND(snd_via82c686, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER);
MODULE_VERSION(snd_via82c686, 1);