sound/drivers/mpu401/mpu401.c

   1 /*
   2  *  Driver for generic MPU-401 boards (UART mode only)
   3  *  Copyright (c) by Jaroslav Kysela <perex@perex.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 <linux/init.h>
  24 #include <linux/pnp.h>
  25 #include <linux/err.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/moduleparam.h>
  28 #include <sound/core.h>
  29 #include <sound/mpu401.h>
  30 #include <sound/initval.h>
  31
  32 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  33 MODULE_DESCRIPTION("MPU-401 UART");
  34 MODULE_LICENSE("GPL");
  35
  36 static int index[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -2}; /* exclude the first card */
  37 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  38 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;  /* Enable this card */
  39 #ifdef CONFIG_PNP
  40 static int pnp[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
  41 #endif
  42 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;     /* MPU-401 port number */
  43 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;        /* MPU-401 IRQ */
  44 static int uart_enter[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
  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 module_param_array(uart_enter, bool, NULL, 0444);
  61 MODULE_PARM_DESC(uart_enter, "Issue UART_ENTER command at open.");
  62
  63 static struct platform_device *platform_devices[SNDRV_CARDS];
  64 static int pnp_registered;
  65 static unsigned int snd_mpu401_devices;
  66
  67 static int snd_mpu401_create(int dev, struct snd_card **rcard)
  68 {
  69         struct snd_card *card;
  70         int err;
  71
  72         if (!uart_enter[dev])
  73                 snd_printk(KERN_ERR "the uart_enter option is obsolete; remove it\n");
  74
  75         *rcard = NULL;
  76         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
  77         if (card == NULL)
  78                 return -ENOMEM;
  79         strcpy(card->driver, "MPU-401 UART");
  80         strcpy(card->shortname, card->driver);
  81         sprintf(card->longname, "%s at %#lx, ", card->shortname, port[dev]);
  82         if (irq[dev] >= 0) {
  83                 sprintf(card->longname + strlen(card->longname), "irq %d", irq[dev]);
  84         } else {
  85                 strcat(card->longname, "polled");
  86         }
  87
  88         err = snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401, port[dev], 0,
  89                                   irq[dev], irq[dev] >= 0 ? IRQF_DISABLED : 0,
  90                                   NULL);
  91         if (err < 0) {
  92                 printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]);
  93                 goto _err;
  94         }
  95
  96         *rcard = card;
  97         return 0;
  98
  99  _err:
 100         snd_card_free(card);
 101         return err;
 102 }
 103
 104 static int __devinit snd_mpu401_probe(struct platform_device *devptr)
 105 {
 106         int dev = devptr->id;
 107         int err;
 108         struct snd_card *card;
 109
 110         if (port[dev] == SNDRV_AUTO_PORT) {
 111                 snd_printk(KERN_ERR "specify port\n");
 112                 return -EINVAL;
 113         }
 114         if (irq[dev] == SNDRV_AUTO_IRQ) {
 115                 snd_printk(KERN_ERR "specify or disable IRQ\n");
 116                 return -EINVAL;
 117         }
 118         err = snd_mpu401_create(dev, &card);
 119         if (err < 0)
 120                 return err;
 121         snd_card_set_dev(card, &devptr->dev);
 122         if ((err = snd_card_register(card)) < 0) {
 123                 snd_card_free(card);
 124                 return err;
 125         }
 126         platform_set_drvdata(devptr, card);
 127         return 0;
 128 }
 129
 130 static int __devexit snd_mpu401_remove(struct platform_device *devptr)
 131 {
 132         snd_card_free(platform_get_drvdata(devptr));
 133         platform_set_drvdata(devptr, NULL);
 134         return 0;
 135 }
 136
 137 #define SND_MPU401_DRIVER       "snd_mpu401"
 138
 139 static struct platform_driver snd_mpu401_driver = {
 140         .probe          = snd_mpu401_probe,
 141         .remove         = __devexit_p(snd_mpu401_remove),
 142         .driver         = {
 143                 .name   = SND_MPU401_DRIVER
 144         },
 145 };
 146
 147
 148 #ifdef CONFIG_PNP
 149
 150 #define IO_EXTENT 2
 151
 152 static struct pnp_device_id snd_mpu401_pnpids[] = {
 153         { .id = "PNPb006" },
 154         { .id = "" }
 155 };
 156
 157 MODULE_DEVICE_TABLE(pnp, snd_mpu401_pnpids);
 158
 159 static int __devinit snd_mpu401_pnp(int dev, struct pnp_dev *device,
 160                                  const struct pnp_device_id *id)
 161 {
 162         if (!pnp_port_valid(device, 0) ||
 163             pnp_port_flags(device, 0) & IORESOURCE_DISABLED) {
 164                 snd_printk(KERN_ERR "no PnP port\n");
 165                 return -ENODEV;
 166         }
 167         if (pnp_port_len(device, 0) < IO_EXTENT) {
 168                 snd_printk(KERN_ERR "PnP port length is %llu, expected %d\n",
 169                            (unsigned long long)pnp_port_len(device, 0),
 170                            IO_EXTENT);
 171                 return -ENODEV;
 172         }
 173         port[dev] = pnp_port_start(device, 0);
 174
 175         if (!pnp_irq_valid(device, 0) ||
 176             pnp_irq_flags(device, 0) & IORESOURCE_DISABLED) {
 177                 snd_printk(KERN_WARNING "no PnP irq, using polling\n");
 178                 irq[dev] = -1;
 179         } else {
 180                 irq[dev] = pnp_irq(device, 0);
 181         }
 182         return 0;
 183 }
 184
 185 static int __devinit snd_mpu401_pnp_probe(struct pnp_dev *pnp_dev,
 186                                           const struct pnp_device_id *id)
 187 {
 188         static int dev;
 189         struct snd_card *card;
 190         int err;
 191
 192         for ( ; dev < SNDRV_CARDS; ++dev) {
 193                 if (!enable[dev] || !pnp[dev])
 194                         continue;
 195                 err = snd_mpu401_pnp(dev, pnp_dev, id);
 196                 if (err < 0)
 197                         return err;
 198                 err = snd_mpu401_create(dev, &card);
 199                 if (err < 0)
 200                         return err;
 201                 if ((err = snd_card_register(card)) < 0) {
 202                         snd_card_free(card);
 203                         return err;
 204                 }
 205                 snd_card_set_dev(card, &pnp_dev->dev);
 206                 pnp_set_drvdata(pnp_dev, card);
 207                 snd_mpu401_devices++;
 208                 ++dev;
 209                 return 0;
 210         }
 211         return -ENODEV;
 212 }
 213
 214 static void __devexit snd_mpu401_pnp_remove(struct pnp_dev *dev)
 215 {
 216         struct snd_card *card = (struct snd_card *) pnp_get_drvdata(dev);
 217
 218         snd_card_disconnect(card);
 219         snd_card_free_when_closed(card);
 220 }
 221
 222 static struct pnp_driver snd_mpu401_pnp_driver = {
 223         .name = "mpu401",
 224         .id_table = snd_mpu401_pnpids,
 225         .probe = snd_mpu401_pnp_probe,
 226         .remove = __devexit_p(snd_mpu401_pnp_remove),
 227 };
 228 #else
 229 static struct pnp_driver snd_mpu401_pnp_driver;
 230 #endif
 231
 232 static void snd_mpu401_unregister_all(void)
 233 {
 234         int i;
 235
 236         if (pnp_registered)
 237                 pnp_unregister_driver(&snd_mpu401_pnp_driver);
 238         for (i = 0; i < ARRAY_SIZE(platform_devices); ++i)
 239                 platform_device_unregister(platform_devices[i]);
 240         platform_driver_unregister(&snd_mpu401_driver);
 241 }
 242
 243 static int __init alsa_card_mpu401_init(void)
 244 {
 245         int i, err;
 246
 247         if ((err = platform_driver_register(&snd_mpu401_driver)) < 0)
 248                 return err;
 249
 250         for (i = 0; i < SNDRV_CARDS; i++) {
 251                 struct platform_device *device;
 252                 if (! enable[i])
 253                         continue;
 254 #ifdef CONFIG_PNP
 255                 if (pnp[i])
 256                         continue;
 257 #endif
 258                 device = platform_device_register_simple(SND_MPU401_DRIVER,
 259                                                          i, NULL, 0);
 260                 if (IS_ERR(device))
 261                         continue;
 262                 if (!platform_get_drvdata(device)) {
 263                         platform_device_unregister(device);
 264                         continue;
 265                 }
 266                 platform_devices[i] = device;
 267                 snd_mpu401_devices++;
 268         }
 269         err = pnp_register_driver(&snd_mpu401_pnp_driver);
 270         if (!err)
 271                 pnp_registered = 1;
 272
 273         if (!snd_mpu401_devices) {
 274 #ifdef MODULE
 275                 printk(KERN_ERR "MPU-401 device not found or device busy\n");
 276 #endif
 277                 snd_mpu401_unregister_all();
 278                 return -ENODEV;
 279         }
 280         return 0;
 281 }
 282
 283 static void __exit alsa_card_mpu401_exit(void)
 284 {
 285         snd_mpu401_unregister_all();
 286 }
 287
 288 module_init(alsa_card_mpu401_init)
 289 module_exit(alsa_card_mpu401_exit)