--- /dev/null
+/*
+ * 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)
Code Review / kvmfornfv.git / blobdiff