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android_kernel_xiaomi_sm8350/sound/pci/emu10k1/emu10k1.c
James Courtier-Dutton 025cd2f6b1 [ALSA] snd-ca0106, snd-emu10k1: Add symlink in the sys tree. 
CA0106 driver,EMU10K1/EMU10K2 driver
A thread appeared on the LKML. This patch implements the fix.

Question:
in sysfs, /sys/bus/*/drivers lists the driver names, with their exported .name (eg. '.name = 'EMU10K1_Audigy'' in the module code, from now on 'driver name'). In /sys/modules, the kernel modules are listed with their module name, eg. snd_emu10k1. However, it seems to me that in sysfs, there is no way in particular to tell, which module has which .name. That is, that snd_emu10k1 is EMU10K1_Audigy and vice versa.

I wonder whether it wouldn't be possible to add a symlink to the particular module from the driver, and/or from the module to the driver, so the list of devices handled by the module and the module name would be accessible. This way, I would know which driver name corresponds to which module name and vice versa.

Answer:
For PCI drivers, just add the line:
	.owner = THIS_MODULE,

to their struct pci_driver definition and you will get the symlink
created for you.

Signed-off-by: James Courtier-Dutton <James@superbug.co.uk>
2005-09-12 10:41:07 +02:00

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/*
* The driver for the EMU10K1 (SB Live!) based soundcards
* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
*
* Copyright (c) by James Courtier-Dutton <James@superbug.demon.co.uk>
* Added support for Audigy 2 Value.
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
*/
#include <sound/driver.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/time.h>
#include <linux/moduleparam.h>
#include <sound/core.h>
#include <sound/emu10k1.h>
#include <sound/initval.h>
MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
MODULE_DESCRIPTION("EMU10K1");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Creative Labs,SB Live!/PCI512/E-mu APS},"
"{Creative Labs,SB Audigy}}");
#if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
#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 int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
static int extin[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 0};
static int extout[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 0};
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 int enable_ir[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 0};
static uint subsystem[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 0}; /* 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 struct pci_device_id snd_emu10k1_ids[] = {
{ 0x1102, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, /* EMU10K1 */
{ 0x1102, 0x0004, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1 }, /* Audigy */
{ 0x1102, 0x0008, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1 }, /* Audigy 2 Value SB0400 */
{ 0, }
};
/*
* Audigy 2 Value notes:
* A_IOCFG Input (GPIO)
* 0x400 = Front analog jack plugged in. (Green socket)
* 0x1000 = Read analog jack plugged in. (Black socket)
* 0x2000 = Center/LFE analog jack plugged in. (Orange socket)
* A_IOCFG Output (GPIO)
* 0x60 = Sound out of front Left.
* Win sets it to 0xXX61
*/
MODULE_DEVICE_TABLE(pci, snd_emu10k1_ids);
static int __devinit snd_card_emu10k1_probe(struct pci_dev *pci,
const struct pci_device_id *pci_id)
{
static int dev;
snd_card_t *card;
emu10k1_t *emu;
#ifdef ENABLE_SYNTH
snd_seq_device_t *wave = NULL;
#endif
int err;
if (dev >= SNDRV_CARDS)
return -ENODEV;
if (!enable[dev]) {
dev++;
return -ENOENT;
}
card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
if (card == NULL)
return -ENOMEM;
if (max_buffer_size[dev] < 32)
max_buffer_size[dev] = 32;
else if (max_buffer_size[dev] > 1024)
max_buffer_size[dev] = 1024;
if ((err = snd_emu10k1_create(card, pci, extin[dev], extout[dev],
(long)max_buffer_size[dev] * 1024 * 1024,
enable_ir[dev], subsystem[dev],
&emu)) < 0) {
snd_card_free(card);
return err;
}
if ((err = snd_emu10k1_pcm(emu, 0, NULL)) < 0) {
snd_card_free(card);
return err;
}
if ((err = snd_emu10k1_pcm_mic(emu, 1, NULL)) < 0) {
snd_card_free(card);
return err;
}
if ((err = snd_emu10k1_pcm_efx(emu, 2, NULL)) < 0) {
snd_card_free(card);
return err;
}
/* This stores the periods table. */
if (emu->card_capabilities->ca0151_chip) { /* P16V */
if(snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci), 1024, &emu->p16v_buffer) < 0) {
snd_p16v_free(emu);
return -ENOMEM;
}
}
if ((err = snd_emu10k1_mixer(emu, 0, 3)) < 0) {
snd_card_free(card);
return err;
}
if ((err = snd_emu10k1_timer(emu, 0)) < 0) {
snd_card_free(card);
return err;
}
if ((err = snd_emu10k1_pcm_multi(emu, 3, NULL)) < 0) {
snd_card_free(card);
return err;
}
if (emu->card_capabilities->ca0151_chip) { /* P16V */
if ((err = snd_p16v_pcm(emu, 4, NULL)) < 0) {
snd_card_free(card);
return err;
}
}
if (emu->audigy) {
if ((err = snd_emu10k1_audigy_midi(emu)) < 0) {
snd_card_free(card);
return err;
}
} else {
if ((err = snd_emu10k1_midi(emu)) < 0) {
snd_card_free(card);
return err;
}
}
if ((err = snd_emu10k1_fx8010_new(emu, 0, NULL)) < 0) {
snd_card_free(card);
return err;
}
#ifdef ENABLE_SYNTH
if (snd_seq_device_new(card, 1, SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH,
sizeof(snd_emu10k1_synth_arg_t), &wave) < 0 ||
wave == NULL) {
snd_printk("can't initialize Emu10k1 wavetable synth\n");
} else {
snd_emu10k1_synth_arg_t *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
strcpy(card->driver, emu->card_capabilities->driver);
strcpy(card->shortname, emu->card_capabilities->name);
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);
if ((err = snd_card_register(card)) < 0) {
snd_card_free(card);
return err;
}
pci_set_drvdata(pci, card);
dev++;
return 0;
}
static void __devexit snd_card_emu10k1_remove(struct pci_dev *pci)
{
snd_card_free(pci_get_drvdata(pci));
pci_set_drvdata(pci, NULL);
}
static struct pci_driver driver = {
.name = "EMU10K1_Audigy",
.owner = THIS_MODULE,
.id_table = snd_emu10k1_ids,
.probe = snd_card_emu10k1_probe,
.remove = __devexit_p(snd_card_emu10k1_remove),
};
static int __init alsa_card_emu10k1_init(void)
{
return pci_register_driver(&driver);
}
static void __exit alsa_card_emu10k1_exit(void)
{
pci_unregister_driver(&driver);
}
module_init(alsa_card_emu10k1_init)
module_exit(alsa_card_emu10k1_exit)
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