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