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 <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@perex.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 static int uart_enter[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
  46
  47 module_param_array(index, int, NULL, 0444);
  48 MODULE_PARM_DESC(index, "Index value for MPU-401 device.");
  49 module_param_array(id, charp, NULL, 0444);
  50 MODULE_PARM_DESC(id, "ID string for MPU-401 device.");
  51 module_param_array(enable, bool, NULL, 0444);
  52 MODULE_PARM_DESC(enable, "Enable MPU-401 device.");
  53 #ifdef CONFIG_PNP
  54 module_param_array(pnp, bool, NULL, 0444);
  55 MODULE_PARM_DESC(pnp, "PnP detection for MPU-401 device.");
  56 #endif
  57 module_param_array(port, long, NULL, 0444);
  58 MODULE_PARM_DESC(port, "Port # for MPU-401 device.");
  59 module_param_array(irq, int, NULL, 0444);
  60 MODULE_PARM_DESC(irq, "IRQ # for MPU-401 device.");
  61 module_param_array(uart_enter, bool, NULL, 0444);
  62 MODULE_PARM_DESC(uart_enter, "Issue UART_ENTER command at open.");
  63
  64 static struct platform_device *platform_devices[SNDRV_CARDS];
  65 static int pnp_registered;
  66 static unsigned int snd_mpu401_devices;
  67
  68 static int snd_mpu401_create(int dev, struct snd_card **rcard)
  69 {
  70         struct snd_card *card;
  71         int err;
  72
  73         if (!uart_enter[dev])
  74                 snd_printk(KERN_ERR "the uart_enter option is obsolete; remove it\n");
  75
  76         *rcard = NULL;
  77         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
  78         if (card == NULL)
  79                 return -ENOMEM;
  80         strcpy(card->driver, "MPU-401 UART");
  81         strcpy(card->shortname, card->driver);
  82         sprintf(card->longname, "%s at %#lx, ", card->shortname, port[dev]);
  83         if (irq[dev] >= 0) {
  84                 sprintf(card->longname + strlen(card->longname), "irq %d", irq[dev]);
  85         } else {
  86                 strcat(card->longname, "polled");
  87         }
  88
  89         err = snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401, port[dev], 0,
  90                                   irq[dev], irq[dev] >= 0 ? IRQF_DISABLED : 0,
  91                                   NULL);
  92         if (err < 0) {
  93                 printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]);
  94                 goto _err;
  95         }
  96
  97         *rcard = card;
  98         return 0;
  99
 100  _err:
 101         snd_card_free(card);
 102         return err;
 103 }
 104
 105 static int __devinit snd_mpu401_probe(struct platform_device *devptr)
 106 {
 107         int dev = devptr->id;
 108         int err;
 109         struct snd_card *card;
 110
 111         if (port[dev] == SNDRV_AUTO_PORT) {
 112                 snd_printk(KERN_ERR "specify port\n");
 113                 return -EINVAL;
 114         }
 115         if (irq[dev] == SNDRV_AUTO_IRQ) {
 116                 snd_printk(KERN_ERR "specify or disable IRQ\n");
 117                 return -EINVAL;
 118         }
 119         err = snd_mpu401_create(dev, &card);
 120         if (err < 0)
 121                 return err;
 122         snd_card_set_dev(card, &devptr->dev);
 123         if ((err = snd_card_register(card)) < 0) {
 124                 snd_card_free(card);
 125                 return err;
 126         }
 127         platform_set_drvdata(devptr, card);
 128         return 0;
 129 }
 130
 131 static int __devexit snd_mpu401_remove(struct platform_device *devptr)
 132 {
 133         snd_card_free(platform_get_drvdata(devptr));
 134         platform_set_drvdata(devptr, NULL);
 135         return 0;
 136 }
 137
 138 #define SND_MPU401_DRIVER       "snd_mpu401"
 139
 140 static struct platform_driver snd_mpu401_driver = {
 141         .probe          = snd_mpu401_probe,
 142         .remove         = __devexit_p(snd_mpu401_remove),
 143         .driver         = {
 144                 .name   = SND_MPU401_DRIVER
 145         },
 146 };
 147
 148
 149 #ifdef CONFIG_PNP
 150
 151 #define IO_EXTENT 2
 152
 153 static struct pnp_device_id snd_mpu401_pnpids[] = {
 154         { .id = "PNPb006" },
 155         { .id = "" }
 156 };
 157
 158 MODULE_DEVICE_TABLE(pnp, snd_mpu401_pnpids);
 159
 160 static int __devinit snd_mpu401_pnp(int dev, struct pnp_dev *device,
 161                                  const struct pnp_device_id *id)
 162 {
 163         if (!pnp_port_valid(device, 0) ||
 164             pnp_port_flags(device, 0) & IORESOURCE_DISABLED) {
 165                 snd_printk(KERN_ERR "no PnP port\n");
 166                 return -ENODEV;
 167         }
 168         if (pnp_port_len(device, 0) < IO_EXTENT) {
 169                 snd_printk(KERN_ERR "PnP port length is %llu, expected %d\n",
 170                            (unsigned long long)pnp_port_len(device, 0),
 171                            IO_EXTENT);
 172                 return -ENODEV;
 173         }
 174         port[dev] = pnp_port_start(device, 0);
 175
 176         if (!pnp_irq_valid(device, 0) ||
 177             pnp_irq_flags(device, 0) & IORESOURCE_DISABLED) {
 178                 snd_printk(KERN_WARNING "no PnP irq, using polling\n");
 179                 irq[dev] = -1;
 180         } else {
 181                 irq[dev] = pnp_irq(device, 0);
 182         }
 183         return 0;
 184 }
 185
 186 static int __devinit snd_mpu401_pnp_probe(struct pnp_dev *pnp_dev,
 187                                           const struct pnp_device_id *id)
 188 {
 189         static int dev;
 190         struct snd_card *card;
 191         int err;
 192
 193         for ( ; dev < SNDRV_CARDS; ++dev) {
 194                 if (!enable[dev] || !pnp[dev])
 195                         continue;
 196                 err = snd_mpu401_pnp(dev, pnp_dev, id);
 197                 if (err < 0)
 198                         return err;
 199                 err = snd_mpu401_create(dev, &card);
 200                 if (err < 0)
 201                         return err;
 202                 if ((err = snd_card_register(card)) < 0) {
 203                         snd_card_free(card);
 204                         return err;
 205                 }
 206                 snd_card_set_dev(card, &pnp_dev->dev);
 207                 pnp_set_drvdata(pnp_dev, card);
 208                 snd_mpu401_devices++;
 209                 ++dev;
 210                 return 0;
 211         }
 212         return -ENODEV;
 213 }
 214
 215 static void __devexit snd_mpu401_pnp_remove(struct pnp_dev *dev)
 216 {
 217         struct snd_card *card = (struct snd_card *) pnp_get_drvdata(dev);
 218
 219         snd_card_disconnect(card);
 220         snd_card_free_when_closed(card);
 221 }
 222
 223 static struct pnp_driver snd_mpu401_pnp_driver = {
 224         .name = "mpu401",
 225         .id_table = snd_mpu401_pnpids,
 226         .probe = snd_mpu401_pnp_probe,
 227         .remove = __devexit_p(snd_mpu401_pnp_remove),
 228 };
 229 #else
 230 static struct pnp_driver snd_mpu401_pnp_driver;
 231 #endif
 232
 233 static void snd_mpu401_unregister_all(void)
 234 {
 235         int i;
 236
 237         if (pnp_registered)
 238                 pnp_unregister_driver(&snd_mpu401_pnp_driver);
 239         for (i = 0; i < ARRAY_SIZE(platform_devices); ++i)
 240                 platform_device_unregister(platform_devices[i]);
 241         platform_driver_unregister(&snd_mpu401_driver);
 242 }
 243
 244 static int __init alsa_card_mpu401_init(void)
 245 {
 246         int i, err;
 247
 248         if ((err = platform_driver_register(&snd_mpu401_driver)) < 0)
 249                 return err;
 250
 251         for (i = 0; i < SNDRV_CARDS; i++) {
 252                 struct platform_device *device;
 253                 if (! enable[i])
 254                         continue;
 255 #ifdef CONFIG_PNP
 256                 if (pnp[i])
 257                         continue;
 258 #endif
 259                 device = platform_device_register_simple(SND_MPU401_DRIVER,
 260                                                          i, NULL, 0);
 261                 if (IS_ERR(device))
 262                         continue;
 263                 if (!platform_get_drvdata(device)) {
 264                         platform_device_unregister(device);
 265                         continue;
 266                 }
 267                 platform_devices[i] = device;
 268                 snd_mpu401_devices++;
 269         }
 270         err = pnp_register_driver(&snd_mpu401_pnp_driver);
 271         if (!err)
 272                 pnp_registered = 1;
 273
 274         if (!snd_mpu401_devices) {
 275 #ifdef MODULE
 276                 printk(KERN_ERR "MPU-401 device not found or device busy\n");
 277 #endif
 278                 snd_mpu401_unregister_all();
 279                 return -ENODEV;
 280         }
 281         return 0;
 282 }
 283
 284 static void __exit alsa_card_mpu401_exit(void)
 285 {
 286         snd_mpu401_unregister_all();
 287 }
 288
 289 module_init(alsa_card_mpu401_init)
 290 module_exit(alsa_card_mpu401_exit)