sound/usb/6fire/chip.c

   1 /*
   2  * Linux driver for TerraTec DMX 6Fire USB
   3  *
   4  * Main routines and module definitions.
   5  *
   6  * Author:      Torsten Schenk <torsten.schenk@zoho.com>
   7  * Created:     Jan 01, 2011
   8  * Version:     0.3.0
   9  * Copyright:   (C) Torsten Schenk
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  */
  16
  17 #include "chip.h"
  18 #include "firmware.h"
  19 #include "pcm.h"
  20 #include "control.h"
  21 #include "comm.h"
  22 #include "midi.h"
  23
  24 #include <linux/moduleparam.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/gfp.h>
  29 #include <sound/initval.h>
  30
  31 MODULE_AUTHOR("Torsten Schenk <torsten.schenk@zoho.com>");
  32 MODULE_DESCRIPTION("TerraTec DMX 6Fire USB audio driver, version 0.3.0");
  33 MODULE_LICENSE("GPL v2");
  34 MODULE_SUPPORTED_DEVICE("{{TerraTec, DMX 6Fire USB}}");
  35
  36 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-max */
  37 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* Id for card */
  38 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable card */
  39 static struct sfire_chip *chips[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
  40 static struct usb_device *devices[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
  41
  42 module_param_array(index, int, NULL, 0444);
  43 MODULE_PARM_DESC(index, "Index value for the 6fire sound device");
  44 module_param_array(id, charp, NULL, 0444);
  45 MODULE_PARM_DESC(id, "ID string for the 6fire sound device.");
  46 module_param_array(enable, bool, NULL, 0444);
  47 MODULE_PARM_DESC(enable, "Enable the 6fire sound device.");
  48
  49 static DEFINE_MUTEX(register_mutex);
  50
  51 static void usb6fire_chip_abort(struct sfire_chip *chip)
  52 {
  53         if (chip) {
  54                 if (chip->pcm)
  55                         usb6fire_pcm_abort(chip);
  56                 if (chip->midi)
  57                         usb6fire_midi_abort(chip);
  58                 if (chip->comm)
  59                         usb6fire_comm_abort(chip);
  60                 if (chip->control)
  61                         usb6fire_control_abort(chip);
  62                 if (chip->card) {
  63                         snd_card_disconnect(chip->card);
  64                         snd_card_free_when_closed(chip->card);
  65                         chip->card = NULL;
  66                 }
  67         }
  68 }
  69
  70 static void usb6fire_chip_destroy(struct sfire_chip *chip)
  71 {
  72         if (chip) {
  73                 if (chip->pcm)
  74                         usb6fire_pcm_destroy(chip);
  75                 if (chip->midi)
  76                         usb6fire_midi_destroy(chip);
  77                 if (chip->comm)
  78                         usb6fire_comm_destroy(chip);
  79                 if (chip->control)
  80                         usb6fire_control_destroy(chip);
  81                 if (chip->card)
  82                         snd_card_free(chip->card);
  83         }
  84 }
  85
  86 static int __devinit usb6fire_chip_probe(struct usb_interface *intf,
  87                 const struct usb_device_id *usb_id)
  88 {
  89         int ret;
  90         int i;
  91         struct sfire_chip *chip = NULL;
  92         struct usb_device *device = interface_to_usbdev(intf);
  93         int regidx = -1; /* index in module parameter array */
  94         struct snd_card *card = NULL;
  95
  96         /* look if we already serve this card and return if so */
  97         mutex_lock(&register_mutex);
  98         for (i = 0; i < SNDRV_CARDS; i++) {
  99                 if (devices[i] == device) {
 100                         if (chips[i])
 101                                 chips[i]->intf_count++;
 102                         usb_set_intfdata(intf, chips[i]);
 103                         mutex_unlock(&register_mutex);
 104                         return 0;
 105                 } else if (regidx < 0)
 106                         regidx = i;
 107         }
 108         if (regidx < 0) {
 109                 mutex_unlock(&register_mutex);
 110                 snd_printk(KERN_ERR PREFIX "too many cards registered.\n");
 111                 return -ENODEV;
 112         }
 113         devices[regidx] = device;
 114         mutex_unlock(&register_mutex);
 115
 116         /* check, if firmware is present on device, upload it if not */
 117         ret = usb6fire_fw_init(intf);
 118         if (ret < 0)
 119                 return ret;
 120         else if (ret == FW_NOT_READY) /* firmware update performed */
 121                 return 0;
 122
 123         /* if we are here, card can be registered in alsa. */
 124         if (usb_set_interface(device, 0, 0) != 0) {
 125                 snd_printk(KERN_ERR PREFIX "can't set first interface.\n");
 126                 return -EIO;
 127         }
 128         ret = snd_card_create(index[regidx], id[regidx], THIS_MODULE,
 129                         sizeof(struct sfire_chip), &card);
 130         if (ret < 0) {
 131                 snd_printk(KERN_ERR PREFIX "cannot create alsa card.\n");
 132                 return ret;
 133         }
 134         strcpy(card->driver, "6FireUSB");
 135         strcpy(card->shortname, "TerraTec DMX6FireUSB");
 136         sprintf(card->longname, "%s at %d:%d", card->shortname,
 137                         device->bus->busnum, device->devnum);
 138         snd_card_set_dev(card, &intf->dev);
 139
 140         chip = card->private_data;
 141         chips[regidx] = chip;
 142         chip->dev = device;
 143         chip->regidx = regidx;
 144         chip->intf_count = 1;
 145         chip->card = card;
 146
 147         ret = usb6fire_comm_init(chip);
 148         if (ret < 0) {
 149                 usb6fire_chip_destroy(chip);
 150                 return ret;
 151         }
 152
 153         ret = usb6fire_midi_init(chip);
 154         if (ret < 0) {
 155                 usb6fire_chip_destroy(chip);
 156                 return ret;
 157         }
 158
 159         ret = usb6fire_pcm_init(chip);
 160         if (ret < 0) {
 161                 usb6fire_chip_destroy(chip);
 162                 return ret;
 163         }
 164
 165         ret = usb6fire_control_init(chip);
 166         if (ret < 0) {
 167                 usb6fire_chip_destroy(chip);
 168                 return ret;
 169         }
 170
 171         ret = snd_card_register(card);
 172         if (ret < 0) {
 173                 snd_printk(KERN_ERR PREFIX "cannot register card.");
 174                 usb6fire_chip_destroy(chip);
 175                 return ret;
 176         }
 177         usb_set_intfdata(intf, chip);
 178         return 0;
 179 }
 180
 181 static void usb6fire_chip_disconnect(struct usb_interface *intf)
 182 {
 183         struct sfire_chip *chip;
 184         struct snd_card *card;
 185
 186         chip = usb_get_intfdata(intf);
 187         if (chip) { /* if !chip, fw upload has been performed */
 188                 card = chip->card;
 189                 chip->intf_count--;
 190                 if (!chip->intf_count) {
 191                         mutex_lock(&register_mutex);
 192                         devices[chip->regidx] = NULL;
 193                         chips[chip->regidx] = NULL;
 194                         mutex_unlock(&register_mutex);
 195
 196                         chip->shutdown = true;
 197                         usb6fire_chip_abort(chip);
 198                         usb6fire_chip_destroy(chip);
 199                 }
 200         }
 201 }
 202
 203 static struct usb_device_id device_table[] = {
 204         {
 205                 .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
 206                 .idVendor = 0x0ccd,
 207                 .idProduct = 0x0080
 208         },
 209         {}
 210 };
 211
 212 MODULE_DEVICE_TABLE(usb, device_table);
 213
 214 static struct usb_driver driver = {
 215         .name = "snd-usb-6fire",
 216         .probe = usb6fire_chip_probe,
 217         .disconnect = usb6fire_chip_disconnect,
 218         .id_table = device_table,
 219 };
 220
 221 static int __init usb6fire_chip_init(void)
 222 {
 223         return usb_register(&driver);
 224 }
 225
 226 static void __exit usb6fire_chip_cleanup(void)
 227 {
 228         usb_deregister(&driver);
 229 }
 230
 231 module_init(usb6fire_chip_init);
 232 module_exit(usb6fire_chip_cleanup);