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linux/sound/pci/emu10k1/emu10k1.c
Oswald Buddenhagen f848337cd8 ALSA: emu10k1: move the whole GPIO event handling to the workqueue 
The actual event processing was already done by workqueue items. We can
move the event dispatching there as well, rather than doing it already
in the interrupt handler callback.

This change has a rather profound "side effect" on the reliability of
the FPGA programming: once we enter programming mode, we must not issue
any snd_emu1010_fpga_{read,write}() calls until we're done, as these
would badly mess up the programming protocol. But exactly that would
happen when trying to program the dock, as that triggers GPIO interrupts
as a side effect. This is mitigated by deferring the actual interrupt
handling, as workqueue items are not re-entrant.

To avoid scheduling the dispatcher on non-events, we now explicitly
ignore GPIO IRQs triggered by "uninteresting" pins, which happens a lot
as a side effect of calling snd_emu1010_fpga_{read,write}().

Fixes: fbb64eedf5 ("ALSA: emu10k1: make E-MU dock monitoring interrupt-driven")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=218584
Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Message-ID: <20240428093716.3198666-4-oswald.buddenhagen@gmx.de>
2024-04-28 11:58:12 +02:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* The driver for the EMU10K1 (SB Live!) based soundcards
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
* James Courtier-Dutton <James@superbug.co.uk>
*/
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/time.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/emu10k1.h>
#include <sound/initval.h>
MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("EMU10K1");
MODULE_LICENSE("GPL");
#if IS_ENABLED(CONFIG_SND_SEQUENCER)
#define ENABLE_SYNTH
#include <sound/emu10k1_synth.h>
#endif
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
static int extin[SNDRV_CARDS];
static int extout[SNDRV_CARDS];
static int seq_ports[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 4};
static int max_synth_voices[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 64};
static int max_buffer_size[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 128};
static bool enable_ir[SNDRV_CARDS];
static uint subsystem[SNDRV_CARDS]; /* Force card subsystem model */
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for the EMU10K1 soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for the EMU10K1 soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable the EMU10K1 soundcard.");
module_param_array(extin, int, NULL, 0444);
MODULE_PARM_DESC(extin, "Available external inputs for FX8010. Zero=default.");
module_param_array(extout, int, NULL, 0444);
MODULE_PARM_DESC(extout, "Available external outputs for FX8010. Zero=default.");
module_param_array(seq_ports, int, NULL, 0444);
MODULE_PARM_DESC(seq_ports, "Allocated sequencer ports for internal synthesizer.");
module_param_array(max_synth_voices, int, NULL, 0444);
MODULE_PARM_DESC(max_synth_voices, "Maximum number of voices for WaveTable.");
module_param_array(max_buffer_size, int, NULL, 0444);
MODULE_PARM_DESC(max_buffer_size, "Maximum sample buffer size in MB.");
module_param_array(enable_ir, bool, NULL, 0444);
MODULE_PARM_DESC(enable_ir, "Enable IR.");
module_param_array(subsystem, uint, NULL, 0444);
MODULE_PARM_DESC(subsystem, "Force card subsystem model.");
/*
* Class 0401: 1102:0008 (rev 00) Subsystem: 1102:1001 -> Audigy2 Value Model:SB0400
*/
static const struct pci_device_id snd_emu10k1_ids[] = {
{ PCI_VDEVICE(CREATIVE, 0x0002), 0 }, /* EMU10K1 */
{ PCI_VDEVICE(CREATIVE, 0x0004), 1 }, /* Audigy */
{ PCI_VDEVICE(CREATIVE, 0x0008), 1 }, /* Audigy 2 Value SB0400 */
{ 0, }
};
MODULE_DEVICE_TABLE(pci, snd_emu10k1_ids);
static int snd_card_emu10k1_probe(struct pci_dev *pci,
const struct pci_device_id *pci_id)
{
static int dev;
struct snd_card *card;
struct snd_emu10k1 *emu;
#ifdef ENABLE_SYNTH
struct snd_seq_device *wave = NULL;
#endif
int err;
if (dev >= SNDRV_CARDS)
return -ENODEV;
if (!enable[dev]) {
dev++;
return -ENOENT;
}
err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
sizeof(*emu), &card);
if (err < 0)
return err;
emu = card->private_data;
if (max_buffer_size[dev] < 32)
max_buffer_size[dev] = 32;
else if (max_buffer_size[dev] > 1024)
max_buffer_size[dev] = 1024;
err = snd_emu10k1_create(card, pci, extin[dev], extout[dev],
(long)max_buffer_size[dev] * 1024 * 1024,
enable_ir[dev], subsystem[dev]);
if (err < 0)
return err;
err = snd_emu10k1_pcm(emu, 0);
if (err < 0)
return err;
if (emu->card_capabilities->ac97_chip) {
err = snd_emu10k1_pcm_mic(emu, 1);
if (err < 0)
return err;
}
err = snd_emu10k1_pcm_efx(emu, 2);
if (err < 0)
return err;
/* This stores the periods table. */
if (emu->card_capabilities->ca0151_chip) { /* P16V */
emu->p16v_buffer =
snd_devm_alloc_pages(&pci->dev, SNDRV_DMA_TYPE_DEV, 1024);
if (!emu->p16v_buffer)
return -ENOMEM;
}
err = snd_emu10k1_mixer(emu, 0, 3);
if (err < 0)
return err;
err = snd_emu10k1_timer(emu, 0);
if (err < 0)
return err;
err = snd_emu10k1_pcm_multi(emu, 3);
if (err < 0)
return err;
if (emu->card_capabilities->ca0151_chip) { /* P16V */
err = snd_p16v_pcm(emu, 4);
if (err < 0)
return err;
}
if (emu->audigy) {
err = snd_emu10k1_audigy_midi(emu);
if (err < 0)
return err;
} else {
err = snd_emu10k1_midi(emu);
if (err < 0)
return err;
}
err = snd_emu10k1_fx8010_new(emu, 0);
if (err < 0)
return err;
#ifdef ENABLE_SYNTH
if (snd_seq_device_new(card, 1, SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH,
sizeof(struct snd_emu10k1_synth_arg), &wave) < 0 ||
wave == NULL) {
dev_warn(emu->card->dev,
"can't initialize Emu10k1 wavetable synth\n");
} else {
struct snd_emu10k1_synth_arg *arg;
arg = SNDRV_SEQ_DEVICE_ARGPTR(wave);
strcpy(wave->name, "Emu-10k1 Synth");
arg->hwptr = emu;
arg->index = 1;
arg->seq_ports = seq_ports[dev];
arg->max_voices = max_synth_voices[dev];
}
#endif
strscpy(card->driver, emu->card_capabilities->driver,
sizeof(card->driver));
strscpy(card->shortname, emu->card_capabilities->name,
sizeof(card->shortname));
snprintf(card->longname, sizeof(card->longname),
"%s (rev.%d, serial:0x%x) at 0x%lx, irq %i",
card->shortname, emu->revision, emu->serial, emu->port, emu->irq);
err = snd_card_register(card);
if (err < 0)
return err;
pci_set_drvdata(pci, card);
dev++;
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int snd_emu10k1_suspend(struct device *dev)
{
struct snd_card *card = dev_get_drvdata(dev);
struct snd_emu10k1 *emu = card->private_data;
snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
emu->suspend = 1;
cancel_work_sync(&emu->emu1010.work);
snd_ac97_suspend(emu->ac97);
snd_emu10k1_efx_suspend(emu);
snd_emu10k1_suspend_regs(emu);
if (emu->card_capabilities->ca0151_chip)
snd_p16v_suspend(emu);
snd_emu10k1_done(emu);
return 0;
}
static int snd_emu10k1_resume(struct device *dev)
{
struct snd_card *card = dev_get_drvdata(dev);
struct snd_emu10k1 *emu = card->private_data;
snd_emu10k1_resume_init(emu);
snd_emu10k1_efx_resume(emu);
snd_ac97_resume(emu->ac97);
snd_emu10k1_resume_regs(emu);
if (emu->card_capabilities->ca0151_chip)
snd_p16v_resume(emu);
emu->suspend = 0;
snd_power_change_state(card, SNDRV_CTL_POWER_D0);
return 0;
}
static SIMPLE_DEV_PM_OPS(snd_emu10k1_pm, snd_emu10k1_suspend, snd_emu10k1_resume);
#define SND_EMU10K1_PM_OPS &snd_emu10k1_pm
#else
#define SND_EMU10K1_PM_OPS NULL
#endif /* CONFIG_PM_SLEEP */
static struct pci_driver emu10k1_driver = {
.name = KBUILD_MODNAME,
.id_table = snd_emu10k1_ids,
.probe = snd_card_emu10k1_probe,
.driver = {
.pm = SND_EMU10K1_PM_OPS,
},
};
module_pci_driver(emu10k1_driver);
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