diff options
Diffstat (limited to 'kernel/sound/drivers/mpu401/mpu401.c')
| -rw-r--r-- | kernel/sound/drivers/mpu401/mpu401.c | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/kernel/sound/drivers/mpu401/mpu401.c b/kernel/sound/drivers/mpu401/mpu401.c new file mode 100644 index 000000000..fed7e7e21 --- /dev/null +++ b/kernel/sound/drivers/mpu401/mpu401.c @@ -0,0 +1,287 @@ +/* + * 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> + * + * + * 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/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_array(port, long, NULL, 0444); +MODULE_PARM_DESC(port, "Port # for MPU-401 device."); +module_param_array(irq, int, 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 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) |