forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
272 lines
6.8 KiB
272 lines
6.8 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* Driver for generic MPU-401 boards (UART mode only) |
|
* Copyright (c) by Jaroslav Kysela <[email protected]> |
|
* Copyright (c) 2004 by Castet Matthieu <[email protected]> |
|
*/ |
|
|
|
#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 <[email protected]>"); |
|
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_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]); |
|
goto _err; |
|
} |
|
|
|
*rcard = card; |
|
return 0; |
|
|
|
_err: |
|
snd_card_free(card); |
|
return err; |
|
} |
|
|
|
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; |
|
if ((err = snd_card_register(card)) < 0) { |
|
snd_card_free(card); |
|
return err; |
|
} |
|
platform_set_drvdata(devptr, card); |
|
return 0; |
|
} |
|
|
|
static int snd_mpu401_remove(struct platform_device *devptr) |
|
{ |
|
snd_card_free(platform_get_drvdata(devptr)); |
|
return 0; |
|
} |
|
|
|
#define SND_MPU401_DRIVER "snd_mpu401" |
|
|
|
static struct platform_driver snd_mpu401_driver = { |
|
.probe = snd_mpu401_probe, |
|
.remove = snd_mpu401_remove, |
|
.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; |
|
if ((err = snd_card_register(card)) < 0) { |
|
snd_card_free(card); |
|
return err; |
|
} |
|
pnp_set_drvdata(pnp_dev, card); |
|
snd_mpu401_devices++; |
|
++dev; |
|
return 0; |
|
} |
|
return -ENODEV; |
|
} |
|
|
|
static void snd_mpu401_pnp_remove(struct pnp_dev *dev) |
|
{ |
|
struct snd_card *card = (struct snd_card *) pnp_get_drvdata(dev); |
|
|
|
snd_card_disconnect(card); |
|
snd_card_free_when_closed(card); |
|
} |
|
|
|
static struct pnp_driver snd_mpu401_pnp_driver = { |
|
.name = "mpu401", |
|
.id_table = snd_mpu401_pnpids, |
|
.probe = snd_mpu401_pnp_probe, |
|
.remove = snd_mpu401_pnp_remove, |
|
}; |
|
#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; |
|
|
|
if ((err = platform_driver_register(&snd_mpu401_driver)) < 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)
|
|
|