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ALSA: azt3328: add custom AC97 semi-emulation use standard ALSA AC97 layer 

Make use of the very flexible ALSA ac97 layer (hooks for custom I/O!)
on this weird AC97 copycat hardware,
via semi-extended I/O translation/emulation.

Some 5kB binary/loaded size saved (well... additional huge AC97 module
penalty not factored in, of course ;-P).
Given that the driver previously had 20kB that's not bad,
but the much more important thing is to have AC97 layer stress-tested
with a thoroughly weird AC97 copycat (or, simply put, if it were not for
this AC97 test aspect, this effort would merely have been a nut job ;).

Signed-off-by: Andreas Mohr <andi@lisas.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Andreas Mohr 2011-02-19 00:49:32 +01:00 committed by Takashi Iwai
parent 03c2d87a21
commit b5dc20cd21
2 changed files with 408 additions and 48 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
sound/pci/Kconfig
View File

@ -152,10 +152,16 @@ config SND_AZT3328
select SND_MPU401_UART
select SND_PCM
select SND_RAWMIDI
select SND_AC97_CODEC
help
Say Y here to include support for Aztech AZF3328 (PCI168)
soundcards.
Supported features: AC97-"conformant" mixer, MPU401/OPL3, analog I/O
(16bit/8bit, many sample rates [<= 66.2kHz], NO hardware mixing),
Digital Enhanced Game Port, 1.024MHz multimedia sequencer timer,
ext. codec (I2S port), onboard amp (4W/4Ohms/ch), suspend/resume.
To compile this driver as a module, choose M here: the module
will be called snd-azt3328.

450
sound/pci/azt3328.c
View File

@ -1,6 +1,5 @@
/*
* azt3328.c - driver for Aztech AZF3328 based soundcards (e.g. PCI168).
* Copyright (C) 2002, 2005 - 2010 by Andreas Mohr <andi AT lisas.de>
/* azt3328.c - driver for Aztech AZF3328 based soundcards (e.g. PCI168).
* Copyright (C) 2002, 2005 - 2011 by Andreas Mohr <andi AT lisas.de>
*
* Framework borrowed from Bart Hartgers's als4000.c.
* Driver developed on PCI168 AP(W) version (PCI rev. 10, subsystem ID 1801),
@ -66,6 +65,13 @@
* addresses illegally. So far unfortunately it looks like the very flexible
* ALSA AC97 support is still not enough to easily compensate for such a
* grave layout violation despite all tweaks and quirks mechanisms it offers.
* Well, not quite: now ac97 layer is much improved (bus-specific ops!),
* thus I was able to implement support - it's actually working quite well.
* An interesting item might be Aztech AMR 2800-W, since it's an AC97
* modem card which might reveal the Aztech-specific codec ID which
* we might want to pretend, too. Dito PCI168's brother, PCI368,
* where the advertising datasheet says it's AC97-based and has a
* Digital Enhanced Game Port.
* - builtin genuine OPL3 - verified to work fine, 20080506
* - full duplex 16bit playback/record at independent sampling rate
* - MPU401 (+ legacy address support, claimed by one official spec sheet)
@ -189,6 +195,16 @@
#include <sound/mpu401.h>
#include <sound/opl3.h>
#include <sound/initval.h>
/*
* Config switch, to use ALSA's AC97 layer instead of old custom mixer crap.
* If the AC97 compatibility parts we needed to implement locally turn out
* to work nicely, then remove the old implementation eventually.
*/
#define AZF_USE_AC97_LAYER 1
#ifdef AZF_USE_AC97_LAYER
#include <sound/ac97_codec.h>
#endif
#include "azt3328.h"
MODULE_AUTHOR("Andreas Mohr <andi AT lisas.de>");
@ -328,6 +344,10 @@ struct snd_azf3328 {
/* playback, recording and I2S out codecs */
struct snd_azf3328_codec_data codecs[3];
#ifdef AZF_USE_AC97_LAYER
struct snd_ac97 *ac97;
#endif
struct snd_card *card;
struct snd_rawmidi *rmidi;
@ -506,7 +526,7 @@ snd_azf3328_mixer_inw(const struct snd_azf3328 *chip, unsigned reg)
#define AZF_MUTE_BIT 0x80
static bool
snd_azf3328_mixer_set_mute(const struct snd_azf3328 *chip,
snd_azf3328_mixer_mute_control(const struct snd_azf3328 *chip,
unsigned reg, bool do_mute
)
{
@ -521,6 +541,323 @@ snd_azf3328_mixer_set_mute(const struct snd_azf3328 *chip,
return (do_mute) ? !updated : updated;
}
static inline bool
snd_azf3328_mixer_mute_control_master(const struct snd_azf3328 *chip,
bool do_mute
)
{
return snd_azf3328_mixer_mute_control(
chip,
IDX_MIXER_PLAY_MASTER,
do_mute
);
}
static inline bool
snd_azf3328_mixer_mute_control_pcm(const struct snd_azf3328 *chip,
bool do_mute
)
{
return snd_azf3328_mixer_mute_control(
chip,
IDX_MIXER_WAVEOUT,
do_mute
);
}
static inline void
snd_azf3328_mixer_reset(const struct snd_azf3328 *chip)
{
/* reset (close) mixer:
* first mute master volume, then reset
*/
snd_azf3328_mixer_mute_control_master(chip, 1);
snd_azf3328_mixer_outw(chip, IDX_MIXER_RESET, 0x0000);
}
#ifdef AZF_USE_AC97_LAYER
static inline void
snd_azf3328_mixer_ac97_map_unsupported(unsigned short reg, const char *mode)
{
/* need to add some more or less clever emulation? */
printk(KERN_WARNING
"azt3328: missing %s emulation for AC97 register 0x%02x!\n",
mode, reg);
}
/*
* Need to have _special_ AC97 mixer hardware register index mapper,
* to compensate for the issue of a rather AC97-incompatible hardware layout.
*/
#define AZF_REG_MASK 0x3f
#define AZF_AC97_REG_UNSUPPORTED 0x8000
#define AZF_AC97_REG_REAL_IO_READ 0x4000
#define AZF_AC97_REG_REAL_IO_WRITE 0x2000
#define AZF_AC97_REG_REAL_IO_RW \
(AZF_AC97_REG_REAL_IO_READ | AZF_AC97_REG_REAL_IO_WRITE)
#define AZF_AC97_REG_EMU_IO_READ 0x0400
#define AZF_AC97_REG_EMU_IO_WRITE 0x0200
#define AZF_AC97_REG_EMU_IO_RW \
(AZF_AC97_REG_EMU_IO_READ | AZF_AC97_REG_EMU_IO_WRITE)
static unsigned short
snd_azf3328_mixer_ac97_map_reg_idx(unsigned short reg)
{
static const struct {
unsigned short azf_reg;
} azf_reg_mapper[] = {
/* Especially when taking into consideration
* mono/stereo-based sequence of azf vs. AC97 control series,
* it's quite obvious that azf simply got rid
* of the AC97_HEADPHONE control at its intended offset,
* thus shifted _all_ controls by one,
* and _then_ simply added it as an FMSYNTH control at the end,
* to make up for the offset.
* This means we'll have to translate indices here as
* needed and then do some tiny AC97 patch action
* (snd_ac97_rename_vol_ctl() etc.) - that's it.
*/
{ /* AC97_RESET */ IDX_MIXER_RESET
| AZF_AC97_REG_REAL_IO_WRITE
| AZF_AC97_REG_EMU_IO_READ },
{ /* AC97_MASTER */ IDX_MIXER_PLAY_MASTER },
/* note large shift: AC97_HEADPHONE to IDX_MIXER_FMSYNTH! */
{ /* AC97_HEADPHONE */ IDX_MIXER_FMSYNTH },
{ /* AC97_MASTER_MONO */ IDX_MIXER_MODEMOUT },
{ /* AC97_MASTER_TONE */ IDX_MIXER_BASSTREBLE },
{ /* AC97_PC_BEEP */ IDX_MIXER_PCBEEP },
{ /* AC97_PHONE */ IDX_MIXER_MODEMIN },
{ /* AC97_MIC */ IDX_MIXER_MIC },
{ /* AC97_LINE */ IDX_MIXER_LINEIN },
{ /* AC97_CD */ IDX_MIXER_CDAUDIO },
{ /* AC97_VIDEO */ IDX_MIXER_VIDEO },
{ /* AC97_AUX */ IDX_MIXER_AUX },
{ /* AC97_PCM */ IDX_MIXER_WAVEOUT },
{ /* AC97_REC_SEL */ IDX_MIXER_REC_SELECT },
{ /* AC97_REC_GAIN */ IDX_MIXER_REC_VOLUME },
{ /* AC97_REC_GAIN_MIC */ AZF_AC97_REG_EMU_IO_RW },
{ /* AC97_GENERAL_PURPOSE */ IDX_MIXER_ADVCTL2 },
{ /* AC97_3D_CONTROL */ IDX_MIXER_ADVCTL1 },
};
unsigned short reg_azf = AZF_AC97_REG_UNSUPPORTED;
/* azf3328 supports the low-numbered and low-spec:ed range
of AC97 regs only */
if (reg <= AC97_3D_CONTROL) {
unsigned short reg_idx = reg / 2;
reg_azf = azf_reg_mapper[reg_idx].azf_reg;
/* a translation-only entry means it's real read/write: */
if (!(reg_azf & ~AZF_REG_MASK))
reg_azf |= AZF_AC97_REG_REAL_IO_RW;
} else {
switch (reg) {
case AC97_POWERDOWN:
reg_azf = AZF_AC97_REG_EMU_IO_RW;
break;
case AC97_EXTENDED_ID:
reg_azf = AZF_AC97_REG_EMU_IO_READ;
break;
case AC97_EXTENDED_STATUS:
/* I don't know what the h*ll AC97 layer
* would consult this _extended_ register for
* given a base-AC97-advertised card,
* but let's just emulate it anyway :-P
*/
reg_azf = AZF_AC97_REG_EMU_IO_RW;
break;
case AC97_VENDOR_ID1:
case AC97_VENDOR_ID2:
reg_azf = AZF_AC97_REG_EMU_IO_READ;
break;
}
}
return reg_azf;
}
static const unsigned short
azf_emulated_ac97_caps =
AC97_BC_DEDICATED_MIC |
AC97_BC_BASS_TREBLE |
/* Headphone is an FM Synth control here */
AC97_BC_HEADPHONE |
/* no AC97_BC_LOUDNESS! */
/* mask 0x7c00 is
vendor-specific 3D enhancement
vendor indicator.
Since there actually _is_ an
entry for Aztech Labs
(13), make damn sure
to indicate it. */
(13 << 10);
static const unsigned short
azf_emulated_ac97_powerdown =
/* pretend everything to be active */
AC97_PD_ADC_STATUS |
AC97_PD_DAC_STATUS |
AC97_PD_MIXER_STATUS |
AC97_PD_VREF_STATUS;
/*
* Emulated, _inofficial_ vendor ID
* (there might be some devices such as the MR 2800-W
* which could reveal the real Aztech AC97 ID).
* We choose to use "AZT" prefix, and then use 1 to indicate PCI168
* (better don't use 0x68 since there's a PCI368 as well).
*/
static const unsigned int
azf_emulated_ac97_vendor_id = 0x415a5401;
static unsigned short
snd_azf3328_mixer_ac97_read(struct snd_ac97 *ac97, unsigned short reg_ac97)
{
const struct snd_azf3328 *chip = ac97->private_data;
unsigned short reg_azf = snd_azf3328_mixer_ac97_map_reg_idx(reg_ac97);
unsigned short reg_val = 0;
bool unsupported = 0;
snd_azf3328_dbgmixer(
"snd_azf3328_mixer_ac97_read reg_ac97 %u\n",
reg_ac97
);
if (reg_azf & AZF_AC97_REG_UNSUPPORTED)
unsupported = 1;
else {
if (reg_azf & AZF_AC97_REG_REAL_IO_READ)
reg_val = snd_azf3328_mixer_inw(chip,
reg_azf & AZF_REG_MASK);
else {
/*
* Proceed with dummy I/O read,
* to ensure compatible timing where this may matter.
* (ALSA AC97 layer usually doesn't call I/O functions
* due to intelligent I/O caching anyway)
* Choose a mixer register that's thoroughly unrelated
* to common audio (try to minimize distortion).
*/
snd_azf3328_mixer_inw(chip, IDX_MIXER_SOMETHING30H);
}
if (reg_azf & AZF_AC97_REG_EMU_IO_READ) {
switch (reg_ac97) {
case AC97_RESET:
reg_val |= azf_emulated_ac97_caps;
break;
case AC97_POWERDOWN:
reg_val |= azf_emulated_ac97_powerdown;
break;
case AC97_EXTENDED_ID:
case AC97_EXTENDED_STATUS:
/* AFAICS we simply can't support anything: */
reg_val |= 0;
break;
case AC97_VENDOR_ID1:
reg_val = azf_emulated_ac97_vendor_id >> 16;
break;
case AC97_VENDOR_ID2:
reg_val = azf_emulated_ac97_vendor_id & 0xffff;
break;
default:
unsupported = 1;
break;
}
}
}
if (unsupported)
snd_azf3328_mixer_ac97_map_unsupported(reg_ac97, "read");
return reg_val;
}
static void
snd_azf3328_mixer_ac97_write(struct snd_ac97 *ac97,
unsigned short reg_ac97, unsigned short val)
{
const struct snd_azf3328 *chip = ac97->private_data;
unsigned short reg_azf = snd_azf3328_mixer_ac97_map_reg_idx(reg_ac97);
bool unsupported = 0;
snd_azf3328_dbgmixer(
"snd_azf3328_mixer_ac97_write reg_ac97 %u val %u\n",
reg_ac97, val
);
if (reg_azf & AZF_AC97_REG_UNSUPPORTED)
unsupported = 1;
else {
if (reg_azf & AZF_AC97_REG_REAL_IO_WRITE)
snd_azf3328_mixer_outw(
chip,
reg_azf & AZF_REG_MASK,
val
);
else
if (reg_azf & AZF_AC97_REG_EMU_IO_WRITE) {
switch (reg_ac97) {
case AC97_REC_GAIN_MIC:
case AC97_POWERDOWN:
case AC97_EXTENDED_STATUS:
/*
* Silently swallow these writes.
* Since for most registers our card doesn't
* actually support a comparable feature,
* this is exactly what we should do here.
* The AC97 layer's I/O caching probably
* automatically takes care of all the rest...
* (remembers written values etc.)
*/
break;
default:
unsupported = 1;
break;
}
}
}
if (unsupported)
snd_azf3328_mixer_ac97_map_unsupported(reg_ac97, "write");
}
static int __devinit
snd_azf3328_mixer_new(struct snd_azf3328 *chip)
{
struct snd_ac97_bus *bus;
struct snd_ac97_template ac97;
static struct snd_ac97_bus_ops ops = {
.write = snd_azf3328_mixer_ac97_write,
.read = snd_azf3328_mixer_ac97_read,
};
int rc;
memset(&ac97, 0, sizeof(ac97));
ac97.scaps = AC97_SCAP_SKIP_MODEM
| AC97_SCAP_AUDIO /* we support audio! */
| AC97_SCAP_NO_SPDIF;
ac97.private_data = chip;
ac97.pci = chip->pci;
/*
* ALSA's AC97 layer has terrible init crackling issues,
* unfortunately, and since it makes use of AC97_RESET,
* there's no use trying to mute Master Playback proactively.
*/
rc = snd_ac97_bus(chip->card, 0, &ops, NULL, &bus);
if (!rc)
rc = snd_ac97_mixer(bus, &ac97, &chip->ac97);
/*
* Make sure to complain loudly in case of AC97 init failure,
* since failure may happen quite often,
* due to this card being a very quirky AC97 "lookalike".
*/
if (rc)
printk(KERN_ERR "azt3328: AC97 init failed, err %d!\n", rc);
/* If we return an error here, then snd_card_free() should
* free up any ac97 codecs that got created, as well as the bus.
*/
return rc;
}
#else /* AZF_USE_AC97_LAYER */
static void
snd_azf3328_mixer_write_volume_gradually(const struct snd_azf3328 *chip,
unsigned reg,
@ -945,6 +1282,7 @@ snd_azf3328_mixer_new(struct snd_azf3328 *chip)
snd_azf3328_dbgcallleave();
return 0;
}
#endif /* AZF_USE_AC97_LAYER */
static int
snd_azf3328_hw_params(struct snd_pcm_substream *substream,
@ -1239,8 +1577,8 @@ snd_azf3328_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
if (is_main_mixer_playback_codec) {
/* mute WaveOut (avoid clicking during setup) */
previously_muted =
snd_azf3328_mixer_set_mute(
chip, IDX_MIXER_WAVEOUT, 1
snd_azf3328_mixer_mute_control_pcm(
chip, 1
);
}
@ -1296,8 +1634,8 @@ snd_azf3328_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
if (is_main_mixer_playback_codec) {
/* now unmute WaveOut */
if (!previously_muted)
snd_azf3328_mixer_set_mute(
chip, IDX_MIXER_WAVEOUT, 0
snd_azf3328_mixer_mute_control_pcm(
chip, 0
);
}
@ -1321,8 +1659,8 @@ snd_azf3328_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
if (is_main_mixer_playback_codec) {
/* mute WaveOut (avoid clicking during setup) */
previously_muted =
snd_azf3328_mixer_set_mute(
chip, IDX_MIXER_WAVEOUT, 1
snd_azf3328_mixer_mute_control_pcm(
chip, 1
);
}
@ -1347,8 +1685,8 @@ snd_azf3328_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
if (is_main_mixer_playback_codec) {
/* now unmute WaveOut */
if (!previously_muted)
snd_azf3328_mixer_set_mute(
chip, IDX_MIXER_WAVEOUT, 0
snd_azf3328_mixer_mute_control_pcm(
chip, 0
);
}
@ -2056,11 +2394,7 @@ snd_azf3328_free(struct snd_azf3328 *chip)
if (chip->irq < 0)
goto __end_hw;
/* reset (close) mixer:
* first mute master volume, then reset
*/
snd_azf3328_mixer_set_mute(chip, IDX_MIXER_PLAY_MASTER, 1);
snd_azf3328_mixer_outw(chip, IDX_MIXER_RESET, 0x0000);
snd_azf3328_mixer_reset(chip);
snd_azf3328_timer_stop(chip->timer);
snd_azf3328_gameport_free(chip);
@ -2413,6 +2747,55 @@ snd_azf3328_suspend_regs(unsigned long io_addr, unsigned count, u32 *saved_regs)
}
}
static inline void
snd_azf3328_resume_regs(const u32 *saved_regs,
unsigned long io_addr,
unsigned count
)
{
unsigned reg;
for (reg = 0; reg < count; ++reg) {
outl(*saved_regs, io_addr);
snd_azf3328_dbgpm("resume: io 0x%04lx: 0x%08x --> 0x%08x\n",
io_addr, *saved_regs, inl(io_addr));
++saved_regs;
io_addr += sizeof(*saved_regs);
}
}
static inline void
snd_azf3328_suspend_ac97(struct snd_azf3328 *chip)
{
#ifdef AZF_USE_AC97_LAYER
snd_ac97_suspend(chip->ac97);
#else
snd_azf3328_suspend_regs(chip->mixer_io,
ARRAY_SIZE(chip->saved_regs_mixer), chip->saved_regs_mixer);
/* make sure to disable master volume etc. to prevent looping sound */
snd_azf3328_mixer_mute_control_master(chip, 1);
snd_azf3328_mixer_mute_control_pcm(chip, 1);
#endif /* AZF_USE_AC97_LAYER */
}
static inline void
snd_azf3328_resume_ac97(const struct snd_azf3328 *chip)
{
#ifdef AZF_USE_AC97_LAYER
snd_ac97_resume(chip->ac97);
#else
snd_azf3328_resume_regs(chip->saved_regs_mixer, chip->mixer_io,
ARRAY_SIZE(chip->saved_regs_mixer));
/* unfortunately with 32bit transfers, IDX_MIXER_PLAY_MASTER (0x02)
and IDX_MIXER_RESET (offset 0x00) get touched at the same time,
resulting in a mixer reset condition persisting until _after_
master vol was restored. Thus master vol needs an extra restore. */
outw(((u16 *)chip->saved_regs_mixer)[1], chip->mixer_io + 2);
#endif /* AZF_USE_AC97_LAYER */
}
static int
snd_azf3328_suspend(struct pci_dev *pci, pm_message_t state)
{
@ -2426,12 +2809,7 @@ snd_azf3328_suspend(struct pci_dev *pci, pm_message_t state)
snd_pcm_suspend_all(chip->pcm[AZF_CODEC_PLAYBACK]);
snd_pcm_suspend_all(chip->pcm[AZF_CODEC_I2S_OUT]);
snd_azf3328_suspend_regs(chip->mixer_io,
ARRAY_SIZE(chip->saved_regs_mixer), chip->saved_regs_mixer);
/* make sure to disable master volume etc. to prevent looping sound */
snd_azf3328_mixer_set_mute(chip, IDX_MIXER_PLAY_MASTER, 1);
snd_azf3328_mixer_set_mute(chip, IDX_MIXER_WAVEOUT, 1);
snd_azf3328_suspend_ac97(chip);
snd_azf3328_suspend_regs(chip->ctrl_io,
ARRAY_SIZE(chip->saved_regs_ctrl), chip->saved_regs_ctrl);
@ -2453,23 +2831,6 @@ snd_azf3328_suspend(struct pci_dev *pci, pm_message_t state)
return 0;
}
static inline void
snd_azf3328_resume_regs(const u32 *saved_regs,
unsigned long io_addr,
unsigned count
)
{
unsigned reg;
for (reg = 0; reg < count; ++reg) {
outl(*saved_regs, io_addr);
snd_azf3328_dbgpm("resume: io 0x%04lx: 0x%08x --> 0x%08x\n",
io_addr, *saved_regs, inl(io_addr));
++saved_regs;
io_addr += sizeof(*saved_regs);
}
}
static int
snd_azf3328_resume(struct pci_dev *pci)
{
@ -2493,14 +2854,7 @@ snd_azf3328_resume(struct pci_dev *pci)
snd_azf3328_resume_regs(chip->saved_regs_opl3, chip->opl3_io,
ARRAY_SIZE(chip->saved_regs_opl3));
snd_azf3328_resume_regs(chip->saved_regs_mixer, chip->mixer_io,
ARRAY_SIZE(chip->saved_regs_mixer));
/* unfortunately with 32bit transfers, IDX_MIXER_PLAY_MASTER (0x02)
and IDX_MIXER_RESET (offset 0x00) get touched at the same time,
resulting in a mixer reset condition persisting until _after_
master vol was restored. Thus master vol needs an extra restore. */
outw(((u16 *)chip->saved_regs_mixer)[1], chip->mixer_io + 2);
snd_azf3328_resume_ac97(chip);
snd_azf3328_resume_regs(chip->saved_regs_ctrl, chip->ctrl_io,
ARRAY_SIZE(chip->saved_regs_ctrl));