sound/drivers/mpu401/mpu401.c - maze/linux - Git at Google

 /*
  *  Driver for generic MPU-401 boards (UART mode only)
  *  Copyright (c) by Jaroslav Kysela <perex@suse.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 <sound/driver.h>
 #include <linux/init.h>
 #include <linux/pnp.h>
 #include <linux/moduleparam.h>
 #include <sound/core.h>
 #include <sound/mpu401.h>
 #include <sound/initval.h>

 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.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 int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;	/* Enable this card */
 #ifdef CONFIG_PNP
 static int 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 */

 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.");

 static snd_card_t *snd_mpu401_legacy_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
 static int pnp_registered = 0;

 static int snd_mpu401_create(int dev, snd_card_t **rcard)
 {
 	snd_card_t *card;
 	int err;

 	*rcard = NULL;
 	card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
 	if (card == NULL)
 		return -ENOMEM;
 	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");
 	}

 	if ((err = snd_mpu401_uart_new(card, 0,
 				       MPU401_HW_MPU401,
 				       port[dev], 0,
 				       irq[dev], irq[dev] >= 0 ? SA_INTERRUPT : 0, NULL)) < 0) {
 		printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]);
 		goto _err;
 	}

 	if ((err = snd_card_set_generic_dev(card)) < 0)
 		goto _err;

 	if ((err = snd_card_register(card)) < 0)
 		goto _err;

 	*rcard = card;
 	return 0;

  _err:
 	snd_card_free(card);
 	return err;
 }

 static int __devinit snd_mpu401_probe(int dev)
 {
 	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;
 	}
 	return snd_mpu401_create(dev, &snd_mpu401_legacy_cards[dev]);
 }

 #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 __init 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 %ld, expected %d\n",
 			   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 __devinit snd_mpu401_pnp_probe(struct pnp_dev *pnp_dev,
 					  const struct pnp_device_id *id)
 {
 	static int dev;
 	snd_card_t *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(dev, &card);
 		if (err < 0)
 			return err;
 		snd_card_set_dev(card, &pnp_dev->dev);
 		pnp_set_drvdata(pnp_dev, card);
 		++dev;
 		return 0;
 	}
 	return -ENODEV;
 }

 static void __devexit snd_mpu401_pnp_remove(struct pnp_dev *dev)
 {
 	snd_card_t *card = (snd_card_t *) pnp_get_drvdata(dev);

 	snd_card_disconnect(card);
 	snd_card_free_in_thread(card);
 }

 static struct pnp_driver snd_mpu401_pnp_driver = {
 	.name = "mpu401",
 	.id_table = snd_mpu401_pnpids,
 	.probe = snd_mpu401_pnp_probe,
 	.remove = __devexit_p(snd_mpu401_pnp_remove),
 };
 #else
 static struct pnp_driver snd_mpu401_pnp_driver;
 #endif

 static int __init alsa_card_mpu401_init(void)
 {
 	int dev, devices = 0;
 	int err;

 	for (dev = 0; dev < SNDRV_CARDS; dev++) {
 		if (!enable[dev])
 			continue;
 #ifdef CONFIG_PNP
 		if (pnp[dev])
 			continue;
 #endif
 		if (snd_mpu401_probe(dev) >= 0)
 			devices++;
 	}
 	if ((err = pnp_register_driver(&snd_mpu401_pnp_driver)) >= 0) {
 		pnp_registered = 1;
 		devices += err;
 	}

 	if (!devices) {
 #ifdef MODULE
 		printk(KERN_ERR "MPU-401 device not found or device busy\n");
 #endif
 		if (pnp_registered)
 			pnp_unregister_driver(&snd_mpu401_pnp_driver);
 		return -ENODEV;
 	}
 	return 0;
 }

 static void __exit alsa_card_mpu401_exit(void)
 {
 	int idx;

 	if (pnp_registered)
 		pnp_unregister_driver(&snd_mpu401_pnp_driver);
 	for (idx = 0; idx < SNDRV_CARDS; idx++)
 		snd_card_free(snd_mpu401_legacy_cards[idx]);
 }

 module_init(alsa_card_mpu401_init)
 module_exit(alsa_card_mpu401_exit)
	/*
	* Driver for generic MPU-401 boards (UART mode only)
	* Copyright (c) by Jaroslav Kysela <perex@suse.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 <sound/driver.h>
	#include <linux/init.h>
	#include <linux/pnp.h>
	#include <linux/moduleparam.h>
	#include <sound/core.h>
	#include <sound/mpu401.h>
	#include <sound/initval.h>

	MODULE_AUTHOR("Jaroslav Kysela <perex@suse.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 int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */
	#ifdef CONFIG_PNP
	static int 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 */

	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.");

	static snd_card_t *snd_mpu401_legacy_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
	static int pnp_registered = 0;

	static int snd_mpu401_create(int dev, snd_card_t **rcard)
	{
	snd_card_t *card;
	int err;

	*rcard = NULL;
	card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
	if (card == NULL)
	return -ENOMEM;
	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");
	}

	if ((err = snd_mpu401_uart_new(card, 0,
	MPU401_HW_MPU401,
	port[dev], 0,
	irq[dev], irq[dev] >= 0 ? SA_INTERRUPT : 0, NULL)) < 0) {
	printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]);
	goto _err;
	}

	if ((err = snd_card_set_generic_dev(card)) < 0)
	goto _err;

	if ((err = snd_card_register(card)) < 0)
	goto _err;

	*rcard = card;
	return 0;

	_err:
	snd_card_free(card);
	return err;
	}

	static int __devinit snd_mpu401_probe(int dev)
	{
	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;
	}
	return snd_mpu401_create(dev, &snd_mpu401_legacy_cards[dev]);
	}

	#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 __init 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 %ld, expected %d\n",
	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 __devinit snd_mpu401_pnp_probe(struct pnp_dev *pnp_dev,
	const struct pnp_device_id *id)
	{
	static int dev;
	snd_card_t *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(dev, &card);
	if (err < 0)
	return err;
	snd_card_set_dev(card, &pnp_dev->dev);
	pnp_set_drvdata(pnp_dev, card);
	++dev;
	return 0;
	}
	return -ENODEV;
	}

	static void __devexit snd_mpu401_pnp_remove(struct pnp_dev *dev)
	{
	snd_card_t card = (snd_card_t ) pnp_get_drvdata(dev);

	snd_card_disconnect(card);
	snd_card_free_in_thread(card);
	}

	static struct pnp_driver snd_mpu401_pnp_driver = {
	.name = "mpu401",
	.id_table = snd_mpu401_pnpids,
	.probe = snd_mpu401_pnp_probe,
	.remove = __devexit_p(snd_mpu401_pnp_remove),
	};
	#else
	static struct pnp_driver snd_mpu401_pnp_driver;
	#endif

	static int __init alsa_card_mpu401_init(void)
	{
	int dev, devices = 0;
	int err;

	for (dev = 0; dev < SNDRV_CARDS; dev++) {
	if (!enable[dev])
	continue;
	#ifdef CONFIG_PNP
	if (pnp[dev])
	continue;
	#endif
	if (snd_mpu401_probe(dev) >= 0)
	devices++;
	}
	if ((err = pnp_register_driver(&snd_mpu401_pnp_driver)) >= 0) {
	pnp_registered = 1;
	devices += err;
	}

	if (!devices) {
	#ifdef MODULE
	printk(KERN_ERR "MPU-401 device not found or device busy\n");
	#endif
	if (pnp_registered)
	pnp_unregister_driver(&snd_mpu401_pnp_driver);
	return -ENODEV;
	}
	return 0;
	}

	static void __exit alsa_card_mpu401_exit(void)
	{
	int idx;

	if (pnp_registered)
	pnp_unregister_driver(&snd_mpu401_pnp_driver);
	for (idx = 0; idx < SNDRV_CARDS; idx++)
	snd_card_free(snd_mpu401_legacy_cards[idx]);
	}

	module_init(alsa_card_mpu401_init)
	module_exit(alsa_card_mpu401_exit)