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  *
   5  *  ACPI PnP Copyright (c) 2004 by Clemens Ladisch <clemens@ladisch.de>
   6  *  based on 8250_acpi.c
   7  *  Copyright (c) 2002-2003 Matthew Wilcox for Hewlett-Packard
   8  *  Copyright (C) 2004 Hewlett-Packard Co
   9  *       Bjorn Helgaas <bjorn.helgaas@hp.com>
  10  *
  11  *
  12  *   This program is free software; you can redistribute it and/or modify
  13  *   it under the terms of the GNU General Public License as published by
  14  *   the Free Software Foundation; either version 2 of the License, or
  15  *   (at your option) any later version.
  16  *
  17  *   This program is distributed in the hope that it will be useful,
  18  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *   GNU General Public License for more details.
  21  *
  22  *   You should have received a copy of the GNU General Public License
  23  *   along with this program; if not, write to the Free Software
  24  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  25  *
  26  */
  27
  28 #include <sound/driver.h>
  29 #include <linux/init.h>
  30 #ifdef CONFIG_ACPI_BUS
  31 #include <linux/acpi.h>
  32 #endif
  33 #include <linux/moduleparam.h>
  34 #include <sound/core.h>
  35 #include <sound/mpu401.h>
  36 #include <sound/initval.h>
  37
  38 #ifdef CONFIG_ACPI_BUS
  39 #define USE_ACPI_PNP
  40 #endif
  41
  42 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
  43 MODULE_DESCRIPTION("MPU-401 UART");
  44 MODULE_LICENSE("GPL");
  45
  46 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  47 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  48 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;  /* Enable this card */
  49 #ifdef USE_ACPI_PNP
  50 static int acpipnp[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = 1 };
  51 #endif
  52 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;     /* MPU-401 port number */
  53 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;        /* MPU-401 IRQ */
  54
  55 module_param_array(index, int, NULL, 0444);
  56 MODULE_PARM_DESC(index, "Index value for MPU-401 device.");
  57 module_param_array(id, charp, NULL, 0444);
  58 MODULE_PARM_DESC(id, "ID string for MPU-401 device.");
  59 module_param_array(enable, bool, NULL, 0444);
  60 MODULE_PARM_DESC(enable, "Enable MPU-401 device.");
  61 #ifdef USE_ACPI_PNP
  62 module_param_array(acpipnp, bool, NULL, 0444);
  63 MODULE_PARM_DESC(acpipnp, "ACPI PnP detection for MPU-401 device.");
  64 #endif
  65 module_param_array(port, long, NULL, 0444);
  66 MODULE_PARM_DESC(port, "Port # for MPU-401 device.");
  67 module_param_array(irq, int, NULL, 0444);
  68 MODULE_PARM_DESC(irq, "IRQ # for MPU-401 device.");
  69
  70 #ifndef CONFIG_ACPI_BUS
  71 struct acpi_device;
  72 #endif
  73
  74 static snd_card_t *snd_mpu401_legacy_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
  75 static int cards;
  76
  77 #ifdef USE_ACPI_PNP
  78
  79 static int acpi_driver_registered;
  80
  81 struct mpu401_resources {
  82         unsigned long port;
  83         int irq;
  84 };
  85
  86 static acpi_status __devinit snd_mpu401_acpi_resource(struct acpi_resource *res,
  87                                                       void *data)
  88 {
  89         struct mpu401_resources *resources = (struct mpu401_resources *)data;
  90
  91         if (res->id == ACPI_RSTYPE_IRQ) {
  92                 if (res->data.irq.number_of_interrupts > 0) {
  93                         resources->irq = acpi_register_gsi(res->data.irq.interrupts[0],
  94                                                            res->data.irq.edge_level,
  95                                                            res->data.irq.active_high_low);
  96                 }
  97         } else if (res->id == ACPI_RSTYPE_IO) {
  98                 if (res->data.io.range_length >= 2) {
  99                         resources->port = res->data.io.min_base_address;
 100                 }
 101         }
 102         return AE_OK;
 103 }
 104
 105 static int __devinit snd_mpu401_acpi_pnp(int dev, struct acpi_device *device)
 106 {
 107         struct mpu401_resources res;
 108         acpi_status status;
 109
 110         res.port = SNDRV_AUTO_PORT;
 111         res.irq = SNDRV_AUTO_IRQ;
 112         status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
 113                                      snd_mpu401_acpi_resource, &res);
 114         if (ACPI_FAILURE(status))
 115                 return -ENODEV;
 116         if (res.port == SNDRV_AUTO_PORT || res.irq == SNDRV_AUTO_IRQ) {
 117                 snd_printk(KERN_ERR "no port or irq in %s _CRS\n",
 118                            acpi_device_bid(device));
 119                 return -ENODEV;
 120         }
 121         port[dev] = res.port;
 122         irq[dev] = res.irq;
 123         return 0;
 124 }
 125
 126 #endif /* USE_ACPI_PNP */
 127
 128 static int __devinit snd_card_mpu401_probe(int dev, struct acpi_device *device)
 129 {
 130         snd_card_t *card;
 131         int err;
 132
 133 #ifdef USE_ACPI_PNP
 134         if (!device) {
 135 #endif
 136                 if (port[dev] == SNDRV_AUTO_PORT) {
 137                         snd_printk(KERN_ERR "specify port\n");
 138                         return -EINVAL;
 139                 }
 140                 if (irq[dev] == SNDRV_AUTO_IRQ) {
 141                         snd_printk(KERN_ERR "specify or disable IRQ port\n");
 142                         return -EINVAL;
 143                 }
 144 #ifdef USE_ACPI_PNP
 145         }
 146 #endif
 147
 148 #ifdef USE_ACPI_PNP
 149         if (device && (err = snd_mpu401_acpi_pnp(dev, device)) < 0)
 150                 return err;
 151 #endif
 152
 153         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
 154         if (card == NULL)
 155                 return -ENOMEM;
 156         strcpy(card->driver, "MPU-401 UART");
 157         strcpy(card->shortname, card->driver);
 158         sprintf(card->longname, "%s at 0x%lx, ", card->shortname, port[dev]);
 159         if (irq[dev] >= 0) {
 160                 sprintf(card->longname + strlen(card->longname), "IRQ %d", irq[dev]);
 161         } else {
 162                 strcat(card->longname, "polled");
 163         }
 164 #ifdef USE_ACPI_PNP
 165         if (device) {
 166                 strcat(card->longname, ", ACPI id ");
 167                 strlcat(card->longname, acpi_device_bid(device), sizeof(card->longname));
 168         }
 169 #endif
 170         if (snd_mpu401_uart_new(card, 0,
 171                                 MPU401_HW_MPU401,
 172                                 port[dev], 0,
 173                                 irq[dev], irq[dev] >= 0 ? SA_INTERRUPT : 0, NULL) < 0) {
 174                 printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]);
 175                 snd_card_free(card);
 176                 return -ENODEV;
 177         }
 178         if ((err = snd_card_register(card)) < 0) {
 179                 snd_card_free(card);
 180                 return err;
 181         }
 182 #ifdef USE_ACPI_PNP
 183         if (device)
 184                 acpi_driver_data(device) = card;
 185         else
 186 #endif
 187                 snd_mpu401_legacy_cards[dev] = card;
 188         ++cards;
 189         return 0;
 190 }
 191
 192 #ifdef USE_ACPI_PNP
 193
 194 static int __devinit snd_mpu401_acpi_add(struct acpi_device *device)
 195 {
 196         static int dev;
 197         int err;
 198
 199         for ( ; dev < SNDRV_CARDS; ++dev) {
 200                 if (!enable[dev] || !acpipnp[dev])
 201                         continue;
 202                 err = snd_card_mpu401_probe(dev, device);
 203                 if (err < 0)
 204                         return err;
 205                 ++dev;
 206                 return 0;
 207         }
 208         return -ENODEV;
 209 }
 210
 211 static int __devexit snd_mpu401_acpi_remove(struct acpi_device *device,
 212                                             int type)
 213 {
 214         snd_card_t *card;
 215
 216         if (!device)
 217                 return -EINVAL;
 218         card = (snd_card_t *)acpi_driver_data(device);
 219         if (!card)
 220                 return -EINVAL;
 221
 222         snd_card_disconnect(card);
 223         snd_card_free_in_thread(card);
 224         acpi_driver_data(device) = NULL;
 225         return 0;
 226 }
 227
 228 static struct acpi_driver snd_mpu401_acpi_driver = {
 229         .name = "MPU-401 Driver",
 230         .class = "mpu401",
 231         .ids = "PNPB006",
 232         .ops = {
 233                 .add = snd_mpu401_acpi_add,
 234                 .remove = __devexit_p(snd_mpu401_acpi_remove),
 235         },
 236 };
 237
 238 #endif /* USE_ACPI_PNP */
 239
 240 static int __init alsa_card_mpu401_init(void)
 241 {
 242         int dev;
 243
 244 #ifdef USE_ACPI_PNP
 245         if (acpi_bus_register_driver(&snd_mpu401_acpi_driver) >= 0)
 246                 acpi_driver_registered = 1;
 247 #endif
 248         for (dev = 0; dev < SNDRV_CARDS; dev++) {
 249                 if (!enable[dev])
 250                         continue;
 251 #ifdef USE_ACPI_PNP
 252                 if (acpipnp[dev] && acpi_driver_registered)
 253                         continue;
 254 #endif
 255                 snd_card_mpu401_probe(dev, NULL);
 256         }
 257         if (!cards) {
 258 #ifdef MODULE
 259                 printk(KERN_ERR "MPU-401 device not found or device busy\n");
 260 #endif
 261 #ifdef USE_ACPI_PNP
 262                 if (acpi_driver_registered)
 263                         acpi_bus_unregister_driver(&snd_mpu401_acpi_driver);
 264 #endif
 265                 return -ENODEV;
 266         }
 267         return 0;
 268 }
 269
 270 static void __exit alsa_card_mpu401_exit(void)
 271 {
 272         int idx;
 273
 274 #ifdef USE_ACPI_PNP
 275         if (acpi_driver_registered)
 276                 acpi_bus_unregister_driver(&snd_mpu401_acpi_driver);
 277 #endif
 278         for (idx = 0; idx < SNDRV_CARDS; idx++)
 279                 snd_card_free(snd_mpu401_legacy_cards[idx]);
 280 }
 281
 282 module_init(alsa_card_mpu401_init)
 283 module_exit(alsa_card_mpu401_exit)