mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 08:44:21 +08:00
de74763295
This patch converts the card object management with devres as a clean up. The remove callback gets reduced by that. This should give no user-visible functional changes. Note that this converts only the mpu401 card driver. The mpu401_uart component is still managed with snd_device. It's for the case where the mpu401_uart component may be removed dynamically without the actual device unbind. Link: https://lore.kernel.org/r/20210715075941.23332-77-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
252 lines
6.3 KiB
C
252 lines
6.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Driver for generic MPU-401 boards (UART mode only)
|
|
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
|
|
* Copyright (c) 2004 by Castet Matthieu <castet.matthieu@free.fr>
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/pnp.h>
|
|
#include <linux/err.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/module.h>
|
|
#include <sound/core.h>
|
|
#include <sound/mpu401.h>
|
|
#include <sound/initval.h>
|
|
|
|
MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
|
|
MODULE_DESCRIPTION("MPU-401 UART");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static int index[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -2}; /* exclude the first card */
|
|
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
|
|
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */
|
|
#ifdef CONFIG_PNP
|
|
static bool pnp[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
|
|
#endif
|
|
static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* MPU-401 port number */
|
|
static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* MPU-401 IRQ */
|
|
static bool uart_enter[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
|
|
|
|
module_param_array(index, int, NULL, 0444);
|
|
MODULE_PARM_DESC(index, "Index value for MPU-401 device.");
|
|
module_param_array(id, charp, NULL, 0444);
|
|
MODULE_PARM_DESC(id, "ID string for MPU-401 device.");
|
|
module_param_array(enable, bool, NULL, 0444);
|
|
MODULE_PARM_DESC(enable, "Enable MPU-401 device.");
|
|
#ifdef CONFIG_PNP
|
|
module_param_array(pnp, bool, NULL, 0444);
|
|
MODULE_PARM_DESC(pnp, "PnP detection for MPU-401 device.");
|
|
#endif
|
|
module_param_hw_array(port, long, ioport, NULL, 0444);
|
|
MODULE_PARM_DESC(port, "Port # for MPU-401 device.");
|
|
module_param_hw_array(irq, int, irq, NULL, 0444);
|
|
MODULE_PARM_DESC(irq, "IRQ # for MPU-401 device.");
|
|
module_param_array(uart_enter, bool, NULL, 0444);
|
|
MODULE_PARM_DESC(uart_enter, "Issue UART_ENTER command at open.");
|
|
|
|
static struct platform_device *platform_devices[SNDRV_CARDS];
|
|
static int pnp_registered;
|
|
static unsigned int snd_mpu401_devices;
|
|
|
|
static int snd_mpu401_create(struct device *devptr, int dev,
|
|
struct snd_card **rcard)
|
|
{
|
|
struct snd_card *card;
|
|
int err;
|
|
|
|
if (!uart_enter[dev])
|
|
snd_printk(KERN_ERR "the uart_enter option is obsolete; remove it\n");
|
|
|
|
*rcard = NULL;
|
|
err = snd_devm_card_new(devptr, index[dev], id[dev], THIS_MODULE,
|
|
0, &card);
|
|
if (err < 0)
|
|
return err;
|
|
strcpy(card->driver, "MPU-401 UART");
|
|
strcpy(card->shortname, card->driver);
|
|
sprintf(card->longname, "%s at %#lx, ", card->shortname, port[dev]);
|
|
if (irq[dev] >= 0) {
|
|
sprintf(card->longname + strlen(card->longname), "irq %d", irq[dev]);
|
|
} else {
|
|
strcat(card->longname, "polled");
|
|
}
|
|
|
|
err = snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401, port[dev], 0,
|
|
irq[dev], NULL);
|
|
if (err < 0) {
|
|
printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]);
|
|
return err;
|
|
}
|
|
|
|
*rcard = card;
|
|
return 0;
|
|
}
|
|
|
|
static int snd_mpu401_probe(struct platform_device *devptr)
|
|
{
|
|
int dev = devptr->id;
|
|
int err;
|
|
struct snd_card *card;
|
|
|
|
if (port[dev] == SNDRV_AUTO_PORT) {
|
|
snd_printk(KERN_ERR "specify port\n");
|
|
return -EINVAL;
|
|
}
|
|
if (irq[dev] == SNDRV_AUTO_IRQ) {
|
|
snd_printk(KERN_ERR "specify or disable IRQ\n");
|
|
return -EINVAL;
|
|
}
|
|
err = snd_mpu401_create(&devptr->dev, dev, &card);
|
|
if (err < 0)
|
|
return err;
|
|
err = snd_card_register(card);
|
|
if (err < 0)
|
|
return err;
|
|
platform_set_drvdata(devptr, card);
|
|
return 0;
|
|
}
|
|
|
|
#define SND_MPU401_DRIVER "snd_mpu401"
|
|
|
|
static struct platform_driver snd_mpu401_driver = {
|
|
.probe = snd_mpu401_probe,
|
|
.driver = {
|
|
.name = SND_MPU401_DRIVER,
|
|
},
|
|
};
|
|
|
|
|
|
#ifdef CONFIG_PNP
|
|
|
|
#define IO_EXTENT 2
|
|
|
|
static const struct pnp_device_id snd_mpu401_pnpids[] = {
|
|
{ .id = "PNPb006" },
|
|
{ .id = "" }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pnp, snd_mpu401_pnpids);
|
|
|
|
static int snd_mpu401_pnp(int dev, struct pnp_dev *device,
|
|
const struct pnp_device_id *id)
|
|
{
|
|
if (!pnp_port_valid(device, 0) ||
|
|
pnp_port_flags(device, 0) & IORESOURCE_DISABLED) {
|
|
snd_printk(KERN_ERR "no PnP port\n");
|
|
return -ENODEV;
|
|
}
|
|
if (pnp_port_len(device, 0) < IO_EXTENT) {
|
|
snd_printk(KERN_ERR "PnP port length is %llu, expected %d\n",
|
|
(unsigned long long)pnp_port_len(device, 0),
|
|
IO_EXTENT);
|
|
return -ENODEV;
|
|
}
|
|
port[dev] = pnp_port_start(device, 0);
|
|
|
|
if (!pnp_irq_valid(device, 0) ||
|
|
pnp_irq_flags(device, 0) & IORESOURCE_DISABLED) {
|
|
snd_printk(KERN_WARNING "no PnP irq, using polling\n");
|
|
irq[dev] = -1;
|
|
} else {
|
|
irq[dev] = pnp_irq(device, 0);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int snd_mpu401_pnp_probe(struct pnp_dev *pnp_dev,
|
|
const struct pnp_device_id *id)
|
|
{
|
|
static int dev;
|
|
struct snd_card *card;
|
|
int err;
|
|
|
|
for ( ; dev < SNDRV_CARDS; ++dev) {
|
|
if (!enable[dev] || !pnp[dev])
|
|
continue;
|
|
err = snd_mpu401_pnp(dev, pnp_dev, id);
|
|
if (err < 0)
|
|
return err;
|
|
err = snd_mpu401_create(&pnp_dev->dev, dev, &card);
|
|
if (err < 0)
|
|
return err;
|
|
err = snd_card_register(card);
|
|
if (err < 0)
|
|
return err;
|
|
pnp_set_drvdata(pnp_dev, card);
|
|
snd_mpu401_devices++;
|
|
++dev;
|
|
return 0;
|
|
}
|
|
return -ENODEV;
|
|
}
|
|
|
|
static struct pnp_driver snd_mpu401_pnp_driver = {
|
|
.name = "mpu401",
|
|
.id_table = snd_mpu401_pnpids,
|
|
.probe = snd_mpu401_pnp_probe,
|
|
};
|
|
#else
|
|
static struct pnp_driver snd_mpu401_pnp_driver;
|
|
#endif
|
|
|
|
static void snd_mpu401_unregister_all(void)
|
|
{
|
|
int i;
|
|
|
|
if (pnp_registered)
|
|
pnp_unregister_driver(&snd_mpu401_pnp_driver);
|
|
for (i = 0; i < ARRAY_SIZE(platform_devices); ++i)
|
|
platform_device_unregister(platform_devices[i]);
|
|
platform_driver_unregister(&snd_mpu401_driver);
|
|
}
|
|
|
|
static int __init alsa_card_mpu401_init(void)
|
|
{
|
|
int i, err;
|
|
|
|
err = platform_driver_register(&snd_mpu401_driver);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
for (i = 0; i < SNDRV_CARDS; i++) {
|
|
struct platform_device *device;
|
|
if (! enable[i])
|
|
continue;
|
|
#ifdef CONFIG_PNP
|
|
if (pnp[i])
|
|
continue;
|
|
#endif
|
|
device = platform_device_register_simple(SND_MPU401_DRIVER,
|
|
i, NULL, 0);
|
|
if (IS_ERR(device))
|
|
continue;
|
|
if (!platform_get_drvdata(device)) {
|
|
platform_device_unregister(device);
|
|
continue;
|
|
}
|
|
platform_devices[i] = device;
|
|
snd_mpu401_devices++;
|
|
}
|
|
err = pnp_register_driver(&snd_mpu401_pnp_driver);
|
|
if (!err)
|
|
pnp_registered = 1;
|
|
|
|
if (!snd_mpu401_devices) {
|
|
#ifdef MODULE
|
|
printk(KERN_ERR "MPU-401 device not found or device busy\n");
|
|
#endif
|
|
snd_mpu401_unregister_all();
|
|
return -ENODEV;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void __exit alsa_card_mpu401_exit(void)
|
|
{
|
|
snd_mpu401_unregister_all();
|
|
}
|
|
|
|
module_init(alsa_card_mpu401_init)
|
|
module_exit(alsa_card_mpu401_exit)
|