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/err.h>
  27 #include <linux/platform_device.h>
  28 #include <linux/moduleparam.h>
  29 #include <sound/core.h>
  30 #include <sound/mpu401.h>
  31 #include <sound/initval.h>
  32
  33 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
  34 MODULE_DESCRIPTION("MPU-401 UART");
  35 MODULE_LICENSE("GPL");
  36
  37 static int index[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -2}; /* exclude the first card */
  38 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  39 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;  /* Enable this card */
  40 #ifdef CONFIG_PNP
  41 static int pnp[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
  42 #endif
  43 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;     /* MPU-401 port number */
  44 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;        /* MPU-401 IRQ */
  45
  46 module_param_array(index, int, NULL, 0444);
  47 MODULE_PARM_DESC(index, "Index value for MPU-401 device.");
  48 module_param_array(id, charp, NULL, 0444);
  49 MODULE_PARM_DESC(id, "ID string for MPU-401 device.");
  50 module_param_array(enable, bool, NULL, 0444);
  51 MODULE_PARM_DESC(enable, "Enable MPU-401 device.");
  52 #ifdef CONFIG_PNP
  53 module_param_array(pnp, bool, NULL, 0444);
  54 MODULE_PARM_DESC(pnp, "PnP detection for MPU-401 device.");
  55 #endif
  56 module_param_array(port, long, NULL, 0444);
  57 MODULE_PARM_DESC(port, "Port # for MPU-401 device.");
  58 module_param_array(irq, int, NULL, 0444);
  59 MODULE_PARM_DESC(irq, "IRQ # for MPU-401 device.");
  60
  61 static struct platform_device *platform_devices[SNDRV_CARDS];
  62 static int pnp_registered = 0;
  63
  64 static int snd_mpu401_create(int dev, struct snd_card **rcard)
  65 {
  66         struct snd_card *card;
  67         int err;
  68
  69         *rcard = NULL;
  70         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
  71         if (card == NULL)
  72                 return -ENOMEM;
  73         strcpy(card->driver, "MPU-401 UART");
  74         strcpy(card->shortname, card->driver);
  75         sprintf(card->longname, "%s at %#lx, ", card->shortname, port[dev]);
  76         if (irq[dev] >= 0) {
  77                 sprintf(card->longname + strlen(card->longname), "irq %d", irq[dev]);
  78         } else {
  79                 strcat(card->longname, "polled");
  80         }
  81
  82         if ((err = snd_mpu401_uart_new(card, 0,
  83                                        MPU401_HW_MPU401,
  84                                        port[dev], 0,
  85                                        irq[dev], irq[dev] >= 0 ? SA_INTERRUPT : 0, NULL)) < 0) {
  86                 printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]);
  87                 goto _err;
  88         }
  89
  90         *rcard = card;
  91         return 0;
  92
  93  _err:
  94         snd_card_free(card);
  95         return err;
  96 }
  97
  98 static int __devinit snd_mpu401_probe(struct platform_device *devptr)
  99 {
 100         int dev = devptr->id;
 101         int err;
 102         struct snd_card *card;
 103
 104         if (port[dev] == SNDRV_AUTO_PORT) {
 105                 snd_printk(KERN_ERR "specify port\n");
 106                 return -EINVAL;
 107         }
 108         if (irq[dev] == SNDRV_AUTO_IRQ) {
 109                 snd_printk(KERN_ERR "specify or disable IRQ\n");
 110                 return -EINVAL;
 111         }
 112         err = snd_mpu401_create(dev, &card);
 113         if (err < 0)
 114                 return err;
 115         snd_card_set_dev(card, &devptr->dev);
 116         if ((err = snd_card_register(card)) < 0) {
 117                 snd_card_free(card);
 118                 return err;
 119         }
 120         platform_set_drvdata(devptr, card);
 121         return 0;
 122 }
 123
 124 static int __devexit snd_mpu401_remove(struct platform_device *devptr)
 125 {
 126         snd_card_free(platform_get_drvdata(devptr));
 127         platform_set_drvdata(devptr, NULL);
 128         return 0;
 129 }
 130
 131 #define SND_MPU401_DRIVER       "snd_mpu401"
 132
 133 static struct platform_driver snd_mpu401_driver = {
 134         .probe          = snd_mpu401_probe,
 135         .remove         = __devexit_p(snd_mpu401_remove),
 136         .driver         = {
 137                 .name   = SND_MPU401_DRIVER
 138         },
 139 };
 140
 141
 142 #ifdef CONFIG_PNP
 143
 144 #define IO_EXTENT 2
 145
 146 static struct pnp_device_id snd_mpu401_pnpids[] = {
 147         { .id = "PNPb006" },
 148         { .id = "" }
 149 };
 150
 151 MODULE_DEVICE_TABLE(pnp, snd_mpu401_pnpids);
 152
 153 static int __init snd_mpu401_pnp(int dev, struct pnp_dev *device,
 154                                  const struct pnp_device_id *id)
 155 {
 156         if (!pnp_port_valid(device, 0) ||
 157             pnp_port_flags(device, 0) & IORESOURCE_DISABLED) {
 158                 snd_printk(KERN_ERR "no PnP port\n");
 159                 return -ENODEV;
 160         }
 161         if (pnp_port_len(device, 0) < IO_EXTENT) {
 162                 snd_printk(KERN_ERR "PnP port length is %ld, expected %d\n",
 163                            pnp_port_len(device, 0), IO_EXTENT);
 164                 return -ENODEV;
 165         }
 166         port[dev] = pnp_port_start(device, 0);
 167
 168         if (!pnp_irq_valid(device, 0) ||
 169             pnp_irq_flags(device, 0) & IORESOURCE_DISABLED) {
 170                 snd_printk(KERN_WARNING "no PnP irq, using polling\n");
 171                 irq[dev] = -1;
 172         } else {
 173                 irq[dev] = pnp_irq(device, 0);
 174         }
 175         return 0;
 176 }
 177
 178 static int __devinit snd_mpu401_pnp_probe(struct pnp_dev *pnp_dev,
 179                                           const struct pnp_device_id *id)
 180 {
 181         static int dev;
 182         struct snd_card *card;
 183         int err;
 184
 185         for ( ; dev < SNDRV_CARDS; ++dev) {
 186                 if (!enable[dev] || !pnp[dev])
 187                         continue;
 188                 err = snd_mpu401_pnp(dev, pnp_dev, id);
 189                 if (err < 0)
 190                         return err;
 191                 err = snd_mpu401_create(dev, &card);
 192                 if (err < 0)
 193                         return err;
 194                 if ((err = snd_card_register(card)) < 0) {
 195                         snd_card_free(card);
 196                         return err;
 197                 }
 198                 snd_card_set_dev(card, &pnp_dev->dev);
 199                 pnp_set_drvdata(pnp_dev, card);
 200                 ++dev;
 201                 return 0;
 202         }
 203         return -ENODEV;
 204 }
 205
 206 static void __devexit snd_mpu401_pnp_remove(struct pnp_dev *dev)
 207 {
 208         struct snd_card *card = (struct snd_card *) pnp_get_drvdata(dev);
 209
 210         snd_card_disconnect(card);
 211         snd_card_free_in_thread(card);
 212 }
 213
 214 static struct pnp_driver snd_mpu401_pnp_driver = {
 215         .name = "mpu401",
 216         .id_table = snd_mpu401_pnpids,
 217         .probe = snd_mpu401_pnp_probe,
 218         .remove = __devexit_p(snd_mpu401_pnp_remove),
 219 };
 220 #else
 221 static struct pnp_driver snd_mpu401_pnp_driver;
 222 #endif
 223
 224 static void __init_or_module snd_mpu401_unregister_all(void)
 225 {
 226         int i;
 227
 228         if (pnp_registered)
 229                 pnp_unregister_driver(&snd_mpu401_pnp_driver);
 230         for (i = 0; i < ARRAY_SIZE(platform_devices); ++i)
 231                 platform_device_unregister(platform_devices[i]);
 232         platform_driver_unregister(&snd_mpu401_driver);
 233 }
 234
 235 static int __init alsa_card_mpu401_init(void)
 236 {
 237         int i, err, devices;
 238
 239         if ((err = platform_driver_register(&snd_mpu401_driver)) < 0)
 240                 return err;
 241
 242         devices = 0;
 243         for (i = 0; i < SNDRV_CARDS; i++) {
 244                 struct platform_device *device;
 245                 if (! enable[i])
 246                         continue;
 247 #ifdef CONFIG_PNP
 248                 if (pnp[i])
 249                         continue;
 250 #endif
 251                 device = platform_device_register_simple(SND_MPU401_DRIVER,
 252                                                          i, NULL, 0);
 253                 if (IS_ERR(device)) {
 254                         err = PTR_ERR(device);
 255                         goto errout;
 256                 }
 257                 platform_devices[i] = device;
 258                 devices++;
 259         }
 260         if ((err = pnp_register_driver(&snd_mpu401_pnp_driver)) >= 0) {
 261                 pnp_registered = 1;
 262                 devices += err;
 263         }
 264
 265         if (!devices) {
 266 #ifdef MODULE
 267                 printk(KERN_ERR "MPU-401 device not found or device busy\n");
 268 #endif
 269                 err = -ENODEV;
 270                 goto errout;
 271         }
 272         return 0;
 273
 274  errout:
 275         snd_mpu401_unregister_all();
 276         return err;
 277 }
 278
 279 static void __exit alsa_card_mpu401_exit(void)
 280 {
 281         snd_mpu401_unregister_all();
 282 }
 283
 284 module_init(alsa_card_mpu401_init)
 285 module_exit(alsa_card_mpu401_exit)