2 * Driver for generic MPU-401 boards (UART mode only)
3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
5 * ACPI PnP Copyright (c) 2004 by Clemens Ladisch <clemens@ladisch.de>
7 * Copyright (c) 2002-2003 Matthew Wilcox for Hewlett-Packard
8 * Copyright (C) 2004 Hewlett-Packard Co
9 * Bjorn Helgaas <bjorn.helgaas@hp.com>
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 #include <sound/driver.h>
29 #include <linux/init.h>
30 #ifdef CONFIG_ACPI_BUS
31 #include <linux/acpi.h>
33 #include <linux/moduleparam.h>
34 #include <sound/core.h>
35 #include <sound/mpu401.h>
36 #include <sound/initval.h>
38 #ifdef CONFIG_ACPI_BUS
42 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
43 MODULE_DESCRIPTION("MPU-401 UART");
44 MODULE_LICENSE("GPL");
46 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
47 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
48 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */
50 static int acpipnp[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = 1 };
52 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* MPU-401 port number */
53 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* MPU-401 IRQ */
56 module_param_array(index, int, boot_devs, 0444);
57 MODULE_PARM_DESC(index, "Index value for MPU-401 device.");
58 module_param_array(id, charp, boot_devs, 0444);
59 MODULE_PARM_DESC(id, "ID string for MPU-401 device.");
60 module_param_array(enable, bool, boot_devs, 0444);
61 MODULE_PARM_DESC(enable, "Enable MPU-401 device.");
63 module_param_array(acpipnp, bool, boot_devs, 0444);
64 MODULE_PARM_DESC(acpipnp, "ACPI PnP detection for MPU-401 device.");
66 module_param_array(port, long, boot_devs, 0444);
67 MODULE_PARM_DESC(port, "Port # for MPU-401 device.");
68 module_param_array(irq, int, boot_devs, 0444);
69 MODULE_PARM_DESC(irq, "IRQ # for MPU-401 device.");
71 #ifndef CONFIG_ACPI_BUS
75 static snd_card_t *snd_mpu401_legacy_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
80 static int acpi_driver_registered;
82 struct mpu401_resources {
87 static acpi_status __devinit snd_mpu401_acpi_resource(struct acpi_resource *res,
90 struct mpu401_resources *resources = (struct mpu401_resources *)data;
92 if (res->id == ACPI_RSTYPE_IRQ) {
93 if (res->data.irq.number_of_interrupts > 0) {
94 resources->irq = acpi_register_gsi(res->data.irq.interrupts[0],
95 res->data.irq.edge_level,
96 res->data.irq.active_high_low);
98 } else if (res->id == ACPI_RSTYPE_IO) {
99 if (res->data.io.range_length >= 2) {
100 resources->port = res->data.io.min_base_address;
106 static int __devinit snd_mpu401_acpi_pnp(int dev, struct acpi_device *device)
108 struct mpu401_resources res;
111 res.port = SNDRV_AUTO_PORT;
112 res.irq = SNDRV_AUTO_IRQ;
113 status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
114 snd_mpu401_acpi_resource, &res);
115 if (ACPI_FAILURE(status))
117 if (res.port == SNDRV_AUTO_PORT || res.irq == SNDRV_AUTO_IRQ) {
118 snd_printk(KERN_ERR "no port or irq in %s _CRS\n",
119 acpi_device_bid(device));
122 port[dev] = res.port;
127 #endif /* USE_ACPI_PNP */
129 static int __devinit snd_card_mpu401_probe(int dev, struct acpi_device *device)
137 if (port[dev] == SNDRV_AUTO_PORT) {
138 snd_printk(KERN_ERR "specify port\n");
141 if (irq[dev] == SNDRV_AUTO_IRQ) {
142 snd_printk(KERN_ERR "specify or disable IRQ port\n");
150 if (device && (err = snd_mpu401_acpi_pnp(dev, device)) < 0)
154 card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
157 strcpy(card->driver, "MPU-401 UART");
158 strcpy(card->shortname, card->driver);
159 sprintf(card->longname, "%s at 0x%lx, ", card->shortname, port[dev]);
161 sprintf(card->longname + strlen(card->longname), "IRQ %d", irq[dev]);
163 strcat(card->longname, "polled");
167 strcat(card->longname, ", ACPI id ");
168 strlcat(card->longname, acpi_device_bid(device), sizeof(card->longname));
171 if (snd_mpu401_uart_new(card, 0,
174 irq[dev], irq[dev] >= 0 ? SA_INTERRUPT : 0, NULL) < 0) {
175 printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]);
179 if ((err = snd_card_register(card)) < 0) {
185 acpi_driver_data(device) = card;
188 snd_mpu401_legacy_cards[dev] = card;
195 static int __devinit snd_mpu401_acpi_add(struct acpi_device *device)
200 for ( ; dev < SNDRV_CARDS; ++dev) {
201 if (!enable[dev] || !acpipnp[dev])
203 err = snd_card_mpu401_probe(dev, device);
212 static int __devexit snd_mpu401_acpi_remove(struct acpi_device *device,
219 card = (snd_card_t *)acpi_driver_data(device);
223 snd_card_disconnect(card);
224 snd_card_free_in_thread(card);
225 acpi_driver_data(device) = NULL;
229 static struct acpi_driver snd_mpu401_acpi_driver = {
230 .name = "MPU-401 Driver",
234 .add = snd_mpu401_acpi_add,
235 .remove = __devexit_p(snd_mpu401_acpi_remove),
239 #endif /* USE_ACPI_PNP */
241 static int __init alsa_card_mpu401_init(void)
246 if (acpi_bus_register_driver(&snd_mpu401_acpi_driver) >= 0)
247 acpi_driver_registered = 1;
249 for (dev = 0; dev < SNDRV_CARDS; dev++) {
253 if (acpipnp[dev] && acpi_driver_registered)
256 snd_card_mpu401_probe(dev, NULL);
260 printk(KERN_ERR "MPU-401 device not found or device busy\n");
263 if (acpi_driver_registered)
264 acpi_bus_unregister_driver(&snd_mpu401_acpi_driver);
271 static void __exit alsa_card_mpu401_exit(void)
276 if (acpi_driver_registered)
277 acpi_bus_unregister_driver(&snd_mpu401_acpi_driver);
279 for (idx = 0; idx < SNDRV_CARDS; idx++)
280 snd_card_free(snd_mpu401_legacy_cards[idx]);
283 module_init(alsa_card_mpu401_init)
284 module_exit(alsa_card_mpu401_exit)