284 lines
7.2 KiB
C
284 lines
7.2 KiB
C
/*
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* Driver for generic MPU-401 boards (UART mode only)
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* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
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*
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* ACPI PnP Copyright (c) 2004 by Clemens Ladisch <clemens@ladisch.de>
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* based on 8250_acpi.c
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* Copyright (c) 2002-2003 Matthew Wilcox for Hewlett-Packard
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* Copyright (C) 2004 Hewlett-Packard Co
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* Bjorn Helgaas <bjorn.helgaas@hp.com>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <sound/driver.h>
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#include <linux/init.h>
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#ifdef CONFIG_ACPI_BUS
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#include <linux/acpi.h>
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#endif
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#include <linux/moduleparam.h>
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#include <sound/core.h>
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#include <sound/mpu401.h>
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#include <sound/initval.h>
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#ifdef CONFIG_ACPI_BUS
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#define USE_ACPI_PNP
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#endif
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MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
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MODULE_DESCRIPTION("MPU-401 UART");
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MODULE_LICENSE("GPL");
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static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
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static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
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static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */
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#ifdef USE_ACPI_PNP
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static int acpipnp[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = 1 };
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#endif
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static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* MPU-401 port number */
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static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* MPU-401 IRQ */
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module_param_array(index, int, NULL, 0444);
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MODULE_PARM_DESC(index, "Index value for MPU-401 device.");
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module_param_array(id, charp, NULL, 0444);
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MODULE_PARM_DESC(id, "ID string for MPU-401 device.");
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module_param_array(enable, bool, NULL, 0444);
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MODULE_PARM_DESC(enable, "Enable MPU-401 device.");
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#ifdef USE_ACPI_PNP
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module_param_array(acpipnp, bool, NULL, 0444);
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MODULE_PARM_DESC(acpipnp, "ACPI PnP detection for MPU-401 device.");
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#endif
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module_param_array(port, long, NULL, 0444);
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MODULE_PARM_DESC(port, "Port # for MPU-401 device.");
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module_param_array(irq, int, NULL, 0444);
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MODULE_PARM_DESC(irq, "IRQ # for MPU-401 device.");
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#ifndef CONFIG_ACPI_BUS
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struct acpi_device;
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#endif
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static snd_card_t *snd_mpu401_legacy_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
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static int cards;
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#ifdef USE_ACPI_PNP
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static int acpi_driver_registered;
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struct mpu401_resources {
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unsigned long port;
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int irq;
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};
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static acpi_status __devinit snd_mpu401_acpi_resource(struct acpi_resource *res,
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void *data)
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{
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struct mpu401_resources *resources = (struct mpu401_resources *)data;
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if (res->id == ACPI_RSTYPE_IRQ) {
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if (res->data.irq.number_of_interrupts > 0) {
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resources->irq = acpi_register_gsi(res->data.irq.interrupts[0],
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res->data.irq.edge_level,
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res->data.irq.active_high_low);
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}
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} else if (res->id == ACPI_RSTYPE_IO) {
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if (res->data.io.range_length >= 2) {
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resources->port = res->data.io.min_base_address;
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}
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}
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return AE_OK;
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}
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static int __devinit snd_mpu401_acpi_pnp(int dev, struct acpi_device *device)
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{
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struct mpu401_resources res;
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acpi_status status;
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res.port = SNDRV_AUTO_PORT;
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res.irq = SNDRV_AUTO_IRQ;
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status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
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snd_mpu401_acpi_resource, &res);
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if (ACPI_FAILURE(status))
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return -ENODEV;
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if (res.port == SNDRV_AUTO_PORT || res.irq == SNDRV_AUTO_IRQ) {
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snd_printk(KERN_ERR "no port or irq in %s _CRS\n",
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acpi_device_bid(device));
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return -ENODEV;
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}
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port[dev] = res.port;
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irq[dev] = res.irq;
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return 0;
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}
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#endif /* USE_ACPI_PNP */
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static int __devinit snd_card_mpu401_probe(int dev, struct acpi_device *device)
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{
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snd_card_t *card;
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int err;
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#ifdef USE_ACPI_PNP
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if (!device) {
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#endif
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if (port[dev] == SNDRV_AUTO_PORT) {
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snd_printk(KERN_ERR "specify port\n");
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return -EINVAL;
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}
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if (irq[dev] == SNDRV_AUTO_IRQ) {
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snd_printk(KERN_ERR "specify or disable IRQ port\n");
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return -EINVAL;
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}
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#ifdef USE_ACPI_PNP
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}
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#endif
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#ifdef USE_ACPI_PNP
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if (device && (err = snd_mpu401_acpi_pnp(dev, device)) < 0)
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return err;
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#endif
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card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
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if (card == NULL)
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return -ENOMEM;
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strcpy(card->driver, "MPU-401 UART");
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strcpy(card->shortname, card->driver);
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sprintf(card->longname, "%s at 0x%lx, ", card->shortname, port[dev]);
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if (irq[dev] >= 0) {
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sprintf(card->longname + strlen(card->longname), "IRQ %d", irq[dev]);
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} else {
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strcat(card->longname, "polled");
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}
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#ifdef USE_ACPI_PNP
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if (device) {
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strcat(card->longname, ", ACPI id ");
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strlcat(card->longname, acpi_device_bid(device), sizeof(card->longname));
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}
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#endif
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if (snd_mpu401_uart_new(card, 0,
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MPU401_HW_MPU401,
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port[dev], 0,
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irq[dev], irq[dev] >= 0 ? SA_INTERRUPT : 0, NULL) < 0) {
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printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]);
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snd_card_free(card);
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return -ENODEV;
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}
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if ((err = snd_card_register(card)) < 0) {
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snd_card_free(card);
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return err;
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}
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#ifdef USE_ACPI_PNP
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if (device)
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acpi_driver_data(device) = card;
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else
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#endif
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snd_mpu401_legacy_cards[dev] = card;
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++cards;
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return 0;
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}
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#ifdef USE_ACPI_PNP
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static int __devinit snd_mpu401_acpi_add(struct acpi_device *device)
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{
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static int dev;
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int err;
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for ( ; dev < SNDRV_CARDS; ++dev) {
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if (!enable[dev] || !acpipnp[dev])
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continue;
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err = snd_card_mpu401_probe(dev, device);
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if (err < 0)
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return err;
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++dev;
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return 0;
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}
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return -ENODEV;
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}
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static int __devexit snd_mpu401_acpi_remove(struct acpi_device *device,
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int type)
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{
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snd_card_t *card;
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if (!device)
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return -EINVAL;
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card = (snd_card_t *)acpi_driver_data(device);
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if (!card)
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return -EINVAL;
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snd_card_disconnect(card);
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snd_card_free_in_thread(card);
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acpi_driver_data(device) = NULL;
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return 0;
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}
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static struct acpi_driver snd_mpu401_acpi_driver = {
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.name = "MPU-401 Driver",
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.class = "mpu401",
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.ids = "PNPB006",
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.ops = {
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.add = snd_mpu401_acpi_add,
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.remove = __devexit_p(snd_mpu401_acpi_remove),
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},
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};
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#endif /* USE_ACPI_PNP */
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static int __init alsa_card_mpu401_init(void)
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{
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int dev;
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#ifdef USE_ACPI_PNP
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if (acpi_bus_register_driver(&snd_mpu401_acpi_driver) >= 0)
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acpi_driver_registered = 1;
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#endif
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for (dev = 0; dev < SNDRV_CARDS; dev++) {
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if (!enable[dev])
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continue;
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#ifdef USE_ACPI_PNP
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if (acpipnp[dev] && acpi_driver_registered)
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continue;
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#endif
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snd_card_mpu401_probe(dev, NULL);
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}
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if (!cards) {
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#ifdef MODULE
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printk(KERN_ERR "MPU-401 device not found or device busy\n");
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#endif
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#ifdef USE_ACPI_PNP
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if (acpi_driver_registered)
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acpi_bus_unregister_driver(&snd_mpu401_acpi_driver);
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#endif
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return -ENODEV;
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}
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return 0;
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}
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static void __exit alsa_card_mpu401_exit(void)
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{
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int idx;
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#ifdef USE_ACPI_PNP
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if (acpi_driver_registered)
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acpi_bus_unregister_driver(&snd_mpu401_acpi_driver);
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#endif
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for (idx = 0; idx < SNDRV_CARDS; idx++)
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snd_card_free(snd_mpu401_legacy_cards[idx]);
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}
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module_init(alsa_card_mpu401_init)
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module_exit(alsa_card_mpu401_exit)
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