sound/drivers/mpu401/mpu401.c

   1 /*
   2  *  Driver for generic MPU-401 boards (UART mode only)
   3  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
   4  *  Copyright (c) 2004 by Castet Matthieu <castet.matthieu@free.fr>
   5  *
   6  *
   7  *   This program is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU General Public License as published by
   9  *   the Free Software Foundation; either version 2 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with this program; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20  *
  21  */
  22
  23 #include <sound/driver.h>
  24 #include <linux/init.h>
  25 #include <linux/pnp.h>
  26 #include <linux/moduleparam.h>
  27 #include <sound/core.h>
  28 #include <sound/mpu401.h>
  29 #include <sound/initval.h>
  30
  31 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
  32 MODULE_DESCRIPTION("MPU-401 UART");
  33 MODULE_LICENSE("GPL");
  34
  35 static int index[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -2}; /* exclude the first card */
  36 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  37 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;  /* Enable this card */
  38 #ifdef CONFIG_PNP
  39 static int pnp[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
  40 #endif
  41 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;     /* MPU-401 port number */
  42 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;        /* MPU-401 IRQ */
  43
  44 module_param_array(index, int, NULL, 0444);
  45 MODULE_PARM_DESC(index, "Index value for MPU-401 device.");
  46 module_param_array(id, charp, NULL, 0444);
  47 MODULE_PARM_DESC(id, "ID string for MPU-401 device.");
  48 module_param_array(enable, bool, NULL, 0444);
  49 MODULE_PARM_DESC(enable, "Enable MPU-401 device.");
  50 #ifdef CONFIG_PNP
  51 module_param_array(pnp, bool, NULL, 0444);
  52 MODULE_PARM_DESC(pnp, "PnP detection for MPU-401 device.");
  53 #endif
  54 module_param_array(port, long, NULL, 0444);
  55 MODULE_PARM_DESC(port, "Port # for MPU-401 device.");
  56 module_param_array(irq, int, NULL, 0444);
  57 MODULE_PARM_DESC(irq, "IRQ # for MPU-401 device.");
  58
  59 static snd_card_t *snd_mpu401_legacy_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
  60 static int pnp_registered = 0;
  61
  62 static int snd_mpu401_create(int dev, snd_card_t **rcard)
  63 {
  64         snd_card_t *card;
  65         int err;
  66
  67         *rcard = NULL;
  68         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
  69         if (card == NULL)
  70                 return -ENOMEM;
  71         strcpy(card->driver, "MPU-401 UART");
  72         strcpy(card->shortname, card->driver);
  73         sprintf(card->longname, "%s at %#lx, ", card->shortname, port[dev]);
  74         if (irq[dev] >= 0) {
  75                 sprintf(card->longname + strlen(card->longname), "irq %d", irq[dev]);
  76         } else {
  77                 strcat(card->longname, "polled");
  78         }
  79
  80         if (snd_mpu401_uart_new(card, 0,
  81                                 MPU401_HW_MPU401,
  82                                 port[dev], 0,
  83                                 irq[dev], irq[dev] >= 0 ? SA_INTERRUPT : 0, NULL) < 0) {
  84                 printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]);
  85                 snd_card_free(card);
  86                 return -ENODEV;
  87         }
  88         if ((err = snd_card_register(card)) < 0) {
  89                 snd_card_free(card);
  90                 return err;
  91         }
  92         *rcard = card;
  93         return 0;
  94 }
  95
  96 static int __devinit snd_mpu401_probe(int dev)
  97 {
  98         if (port[dev] == SNDRV_AUTO_PORT) {
  99                 snd_printk(KERN_ERR "specify port\n");
 100                 return -EINVAL;
 101         }
 102         if (irq[dev] == SNDRV_AUTO_IRQ) {
 103                 snd_printk(KERN_ERR "specify or disable IRQ\n");
 104                 return -EINVAL;
 105         }
 106         return snd_mpu401_create(dev, &snd_mpu401_legacy_cards[dev]);
 107 }
 108
 109 #ifdef CONFIG_PNP
 110
 111 #define IO_EXTENT 2
 112
 113 static struct pnp_device_id snd_mpu401_pnpids[] = {
 114         { .id = "PNPb006" },
 115         { .id = "" }
 116 };
 117
 118 MODULE_DEVICE_TABLE(pnp, snd_mpu401_pnpids);
 119
 120 static int __init snd_mpu401_pnp(int dev, struct pnp_dev *device,
 121                                  const struct pnp_device_id *id)
 122 {
 123         if (!pnp_port_valid(device, 0) ||
 124             pnp_port_flags(device, 0) & IORESOURCE_DISABLED) {
 125                 snd_printk(KERN_ERR "no PnP port\n");
 126                 return -ENODEV;
 127         }
 128         if (pnp_port_len(device, 0) < IO_EXTENT) {
 129                 snd_printk(KERN_ERR "PnP port length is %ld, expected %d\n",
 130                            pnp_port_len(device, 0), IO_EXTENT);
 131                 return -ENODEV;
 132         }
 133         port[dev] = pnp_port_start(device, 0);
 134
 135         if (!pnp_irq_valid(device, 0) ||
 136             pnp_irq_flags(device, 0) & IORESOURCE_DISABLED) {
 137                 snd_printk(KERN_WARNING "no PnP irq, using polling\n");
 138                 irq[dev] = -1;
 139         } else {
 140                 irq[dev] = pnp_irq(device, 0);
 141         }
 142         return 0;
 143 }
 144
 145 static int __devinit snd_mpu401_pnp_probe(struct pnp_dev *pnp_dev,
 146                                           const struct pnp_device_id *id)
 147 {
 148         static int dev;
 149         snd_card_t *card;
 150         int err;
 151
 152         for ( ; dev < SNDRV_CARDS; ++dev) {
 153                 if (!enable[dev] || !pnp[dev])
 154                         continue;
 155                 err = snd_mpu401_pnp(dev, pnp_dev, id);
 156                 if (err < 0)
 157                         return err;
 158                 err = snd_mpu401_create(dev, &card);
 159                 if (err < 0)
 160                         return err;
 161                 snd_card_set_dev(card, &pnp_dev->dev);
 162                 pnp_set_drvdata(pnp_dev, card);
 163                 ++dev;
 164                 return 0;
 165         }
 166         return -ENODEV;
 167 }
 168
 169 static void __devexit snd_mpu401_pnp_remove(struct pnp_dev *dev)
 170 {
 171         snd_card_t *card = (snd_card_t *) pnp_get_drvdata(dev);
 172
 173         snd_card_disconnect(card);
 174         snd_card_free_in_thread(card);
 175 }
 176
 177 static struct pnp_driver snd_mpu401_pnp_driver = {
 178         .name = "mpu401",
 179         .id_table = snd_mpu401_pnpids,
 180         .probe = snd_mpu401_pnp_probe,
 181         .remove = __devexit_p(snd_mpu401_pnp_remove),
 182 };
 183 #else
 184 static struct pnp_driver snd_mpu401_pnp_driver;
 185 #endif
 186
 187 static int __init alsa_card_mpu401_init(void)
 188 {
 189         int dev, devices = 0;
 190         int err;
 191
 192         for (dev = 0; dev < SNDRV_CARDS; dev++) {
 193                 if (!enable[dev])
 194                         continue;
 195 #ifdef CONFIG_PNP
 196                 if (pnp[dev])
 197                         continue;
 198 #endif
 199                 if (snd_mpu401_probe(dev) >= 0)
 200                         devices++;
 201         }
 202         if ((err = pnp_register_driver(&snd_mpu401_pnp_driver)) >= 0) {
 203                 pnp_registered = 1;
 204                 devices += err;
 205         }
 206
 207         if (!devices) {
 208 #ifdef MODULE
 209                 printk(KERN_ERR "MPU-401 device not found or device busy\n");
 210 #endif
 211                 if (pnp_registered)
 212                         pnp_unregister_driver(&snd_mpu401_pnp_driver);
 213                 return -ENODEV;
 214         }
 215         return 0;
 216 }
 217
 218 static void __exit alsa_card_mpu401_exit(void)
 219 {
 220         int idx;
 221
 222         if (pnp_registered)
 223                 pnp_unregister_driver(&snd_mpu401_pnp_driver);
 224         for (idx = 0; idx < SNDRV_CARDS; idx++)
 225                 snd_card_free(snd_mpu401_legacy_cards[idx]);
 226 }
 227
 228 module_init(alsa_card_mpu401_init)
 229 module_exit(alsa_card_mpu401_exit)