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linux/sound/isa/es1688/es1688.c
Lars-Peter Clausen 4b8ab88518 ALSA: es1688: Remove almost always NULL parameter 
snd_es1688_pcm() takes a pointer to a pointer of a PCM where if this
parameter is provided the newly allocated PCM is stored. This PCM is also
available from the pcm field of the snd_es1688 struct that got passed to the
same function. This patch updates all callers which passed a pointer to use
that field instead and then removes the parameter from the function. This
makes the code a bit shorter and cleaner.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-01-02 16:27:03 +01:00

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/*
* Driver for generic ESS AudioDrive ESx688 soundcards
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
*
*
* 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 <linux/init.h>
#include <linux/err.h>
#include <linux/isa.h>
#include <linux/isapnp.h>
#include <linux/time.h>
#include <linux/wait.h>
#include <linux/module.h>
#include <asm/dma.h>
#include <sound/core.h>
#include <sound/es1688.h>
#include <sound/mpu401.h>
#include <sound/opl3.h>
#define SNDRV_LEGACY_FIND_FREE_IRQ
#define SNDRV_LEGACY_FIND_FREE_DMA
#include <sound/initval.h>
#define CRD_NAME "Generic ESS ES1688/ES688 AudioDrive"
#define DEV_NAME "es1688"
MODULE_DESCRIPTION(CRD_NAME);
MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{ESS,ES688 PnP AudioDrive,pnp:ESS0100},"
"{ESS,ES1688 PnP AudioDrive,pnp:ESS0102},"
"{ESS,ES688 AudioDrive,pnp:ESS6881},"
"{ESS,ES1688 AudioDrive,pnp:ESS1681}}");
MODULE_ALIAS("snd_es968");
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
#ifdef CONFIG_PNP
static bool isapnp[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_ISAPNP;
#endif
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */
static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* 0x220,0x240,0x260 */
static long fm_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* Usually 0x388 */
static long mpu_port[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -1};
static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* 5,7,9,10 */
static int mpu_irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* 5,7,9,10 */
static int dma8[SNDRV_CARDS] = SNDRV_DEFAULT_DMA; /* 0,1,3 */
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for " CRD_NAME " soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for " CRD_NAME " soundcard.");
module_param_array(enable, bool, NULL, 0444);
#ifdef CONFIG_PNP
module_param_array(isapnp, bool, NULL, 0444);
MODULE_PARM_DESC(isapnp, "PnP detection for specified soundcard.");
#endif
MODULE_PARM_DESC(enable, "Enable " CRD_NAME " soundcard.");
module_param_array(port, long, NULL, 0444);
MODULE_PARM_DESC(port, "Port # for " CRD_NAME " driver.");
module_param_array(mpu_port, long, NULL, 0444);
MODULE_PARM_DESC(mpu_port, "MPU-401 port # for " CRD_NAME " driver.");
module_param_array(irq, int, NULL, 0444);
module_param_array(fm_port, long, NULL, 0444);
MODULE_PARM_DESC(fm_port, "FM port # for ES1688 driver.");
MODULE_PARM_DESC(irq, "IRQ # for " CRD_NAME " driver.");
module_param_array(mpu_irq, int, NULL, 0444);
MODULE_PARM_DESC(mpu_irq, "MPU-401 IRQ # for " CRD_NAME " driver.");
module_param_array(dma8, int, NULL, 0444);
MODULE_PARM_DESC(dma8, "8-bit DMA # for " CRD_NAME " driver.");
#ifdef CONFIG_PNP
#define is_isapnp_selected(dev) isapnp[dev]
#else
#define is_isapnp_selected(dev) 0
#endif
static int snd_es1688_match(struct device *dev, unsigned int n)
{
return enable[n] && !is_isapnp_selected(n);
}
static int snd_es1688_legacy_create(struct snd_card *card,
struct device *dev, unsigned int n)
{
struct snd_es1688 *chip = card->private_data;
static long possible_ports[] = {0x220, 0x240, 0x260};
static int possible_irqs[] = {5, 9, 10, 7, -1};
static int possible_dmas[] = {1, 3, 0, -1};
int i, error;
if (irq[n] == SNDRV_AUTO_IRQ) {
irq[n] = snd_legacy_find_free_irq(possible_irqs);
if (irq[n] < 0) {
dev_err(dev, "unable to find a free IRQ\n");
return -EBUSY;
}
}
if (dma8[n] == SNDRV_AUTO_DMA) {
dma8[n] = snd_legacy_find_free_dma(possible_dmas);
if (dma8[n] < 0) {
dev_err(dev, "unable to find a free DMA\n");
return -EBUSY;
}
}
if (port[n] != SNDRV_AUTO_PORT)
return snd_es1688_create(card, chip, port[n], mpu_port[n],
irq[n], mpu_irq[n], dma8[n], ES1688_HW_AUTO);
i = 0;
do {
port[n] = possible_ports[i];
error = snd_es1688_create(card, chip, port[n], mpu_port[n],
irq[n], mpu_irq[n], dma8[n], ES1688_HW_AUTO);
} while (error < 0 && ++i < ARRAY_SIZE(possible_ports));
return error;
}
static int snd_es1688_probe(struct snd_card *card, unsigned int n)
{
struct snd_es1688 *chip = card->private_data;
struct snd_opl3 *opl3;
int error;
error = snd_es1688_pcm(card, chip, 0);
if (error < 0)
return error;
error = snd_es1688_mixer(card, chip);
if (error < 0)
return error;
strlcpy(card->driver, "ES1688", sizeof(card->driver));
strlcpy(card->shortname, chip->pcm->name, sizeof(card->shortname));
snprintf(card->longname, sizeof(card->longname),
"%s at 0x%lx, irq %i, dma %i", chip->pcm->name, chip->port,
chip->irq, chip->dma8);
if (fm_port[n] == SNDRV_AUTO_PORT)
fm_port[n] = port[n]; /* share the same port */
if (fm_port[n] > 0) {
if (snd_opl3_create(card, fm_port[n], fm_port[n] + 2,
OPL3_HW_OPL3, 0, &opl3) < 0)
dev_warn(card->dev,
"opl3 not detected at 0x%lx\n", fm_port[n]);
else {
error = snd_opl3_hwdep_new(opl3, 0, 1, NULL);
if (error < 0)
return error;
}
}
if (mpu_irq[n] >= 0 && mpu_irq[n] != SNDRV_AUTO_IRQ &&
chip->mpu_port > 0) {
error = snd_mpu401_uart_new(card, 0, MPU401_HW_ES1688,
chip->mpu_port, 0,
mpu_irq[n], NULL);
if (error < 0)
return error;
}
return snd_card_register(card);
}
static int snd_es1688_isa_probe(struct device *dev, unsigned int n)
{
struct snd_card *card;
int error;
error = snd_card_new(dev, index[n], id[n], THIS_MODULE,
sizeof(struct snd_es1688), &card);
if (error < 0)
return error;
error = snd_es1688_legacy_create(card, dev, n);
if (error < 0)
goto out;
error = snd_es1688_probe(card, n);
if (error < 0)
goto out;
dev_set_drvdata(dev, card);
return 0;
out:
snd_card_free(card);
return error;
}
static int snd_es1688_isa_remove(struct device *dev, unsigned int n)
{
snd_card_free(dev_get_drvdata(dev));
return 0;
}
static struct isa_driver snd_es1688_driver = {
.match = snd_es1688_match,
.probe = snd_es1688_isa_probe,
.remove = snd_es1688_isa_remove,
#if 0 /* FIXME */
.suspend = snd_es1688_suspend,
.resume = snd_es1688_resume,
#endif
.driver = {
.name = DEV_NAME
}
};
static int snd_es968_pnp_is_probed;
#ifdef CONFIG_PNP
static int snd_card_es968_pnp(struct snd_card *card, unsigned int n,
struct pnp_card_link *pcard,
const struct pnp_card_device_id *pid)
{
struct snd_es1688 *chip = card->private_data;
struct pnp_dev *pdev;
int error;
pdev = pnp_request_card_device(pcard, pid->devs[0].id, NULL);
if (pdev == NULL)
return -ENODEV;
error = pnp_activate_dev(pdev);
if (error < 0) {
snd_printk(KERN_ERR "ES968 pnp configure failure\n");
return error;
}
port[n] = pnp_port_start(pdev, 0);
dma8[n] = pnp_dma(pdev, 0);
irq[n] = pnp_irq(pdev, 0);
return snd_es1688_create(card, chip, port[n], mpu_port[n], irq[n],
mpu_irq[n], dma8[n], ES1688_HW_AUTO);
}
static int snd_es968_pnp_detect(struct pnp_card_link *pcard,
const struct pnp_card_device_id *pid)
{
struct snd_card *card;
static unsigned int dev;
int error;
struct snd_es1688 *chip;
if (snd_es968_pnp_is_probed)
return -EBUSY;
for ( ; dev < SNDRV_CARDS; dev++) {
if (enable[dev] && isapnp[dev])
break;
}
if (dev == SNDRV_CARDS)
return -ENODEV;
error = snd_card_new(&pcard->card->dev,
index[dev], id[dev], THIS_MODULE,
sizeof(struct snd_es1688), &card);
if (error < 0)
return error;
chip = card->private_data;
error = snd_card_es968_pnp(card, dev, pcard, pid);
if (error < 0) {
snd_card_free(card);
return error;
}
error = snd_es1688_probe(card, dev);
if (error < 0)
return error;
pnp_set_card_drvdata(pcard, card);
snd_es968_pnp_is_probed = 1;
return 0;
}
static void snd_es968_pnp_remove(struct pnp_card_link *pcard)
{
snd_card_free(pnp_get_card_drvdata(pcard));
pnp_set_card_drvdata(pcard, NULL);
snd_es968_pnp_is_probed = 0;
}
#ifdef CONFIG_PM
static int snd_es968_pnp_suspend(struct pnp_card_link *pcard,
pm_message_t state)
{
struct snd_card *card = pnp_get_card_drvdata(pcard);
struct snd_es1688 *chip = card->private_data;
snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
snd_pcm_suspend_all(chip->pcm);
return 0;
}
static int snd_es968_pnp_resume(struct pnp_card_link *pcard)
{
struct snd_card *card = pnp_get_card_drvdata(pcard);
struct snd_es1688 *chip = card->private_data;
snd_es1688_reset(chip);
snd_power_change_state(card, SNDRV_CTL_POWER_D0);
return 0;
}
#endif
static struct pnp_card_device_id snd_es968_pnpids[] = {
{ .id = "ESS0968", .devs = { { "@@@0968" }, } },
{ .id = "ESS0968", .devs = { { "ESS0968" }, } },
{ .id = "", } /* end */
};
MODULE_DEVICE_TABLE(pnp_card, snd_es968_pnpids);
static struct pnp_card_driver es968_pnpc_driver = {
.flags = PNP_DRIVER_RES_DISABLE,
.name = DEV_NAME " PnP",
.id_table = snd_es968_pnpids,
.probe = snd_es968_pnp_detect,
.remove = snd_es968_pnp_remove,
#ifdef CONFIG_PM
.suspend = snd_es968_pnp_suspend,
.resume = snd_es968_pnp_resume,
#endif
};
#endif
static int __init alsa_card_es1688_init(void)
{
#ifdef CONFIG_PNP
pnp_register_card_driver(&es968_pnpc_driver);
if (snd_es968_pnp_is_probed)
return 0;
pnp_unregister_card_driver(&es968_pnpc_driver);
#endif
return isa_register_driver(&snd_es1688_driver, SNDRV_CARDS);
}
static void __exit alsa_card_es1688_exit(void)
{
if (!snd_es968_pnp_is_probed) {
isa_unregister_driver(&snd_es1688_driver);
return;
}
#ifdef CONFIG_PNP
pnp_unregister_card_driver(&es968_pnpc_driver);
#endif
}
module_init(alsa_card_es1688_init);
module_exit(alsa_card_es1688_exit);
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