kernel/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  * 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
  30 MODULE_AUTHOR("Torsten Schenk <torsten.schenk@zoho.com>");
  31 MODULE_DESCRIPTION("TerraTec DMX 6Fire USB audio driver");
  32 MODULE_LICENSE("GPL v2");
  33 MODULE_SUPPORTED_DEVICE("{{TerraTec,DMX 6Fire USB}}");
  34
  35 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-max */
  36 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* Id for card */
  37 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable card */
  38 static struct sfire_chip *chips[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
  39 static struct usb_device *devices[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
  40
  41 module_param_array(index, int, NULL, 0444);
  42 MODULE_PARM_DESC(index, "Index value for the 6fire sound device");
  43 module_param_array(id, charp, NULL, 0444);
  44 MODULE_PARM_DESC(id, "ID string for the 6fire sound device.");
  45 module_param_array(enable, bool, NULL, 0444);
  46 MODULE_PARM_DESC(enable, "Enable the 6fire sound device.");
  47
  48 static DEFINE_MUTEX(register_mutex);
  49
  50 static 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
  69 static 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
  85 static 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 (!devices[i] && regidx < 0)
 105                         regidx = i;
 106         }
 107         if (regidx < 0) {
 108                 mutex_unlock(&register_mutex);
 109                 dev_err(&intf->dev, "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                 dev_err(&intf->dev, "can't set first interface.\n");
 125                 return -EIO;
 126         }
 127         ret = snd_card_new(&intf->dev, index[regidx], id[regidx],
 128                            THIS_MODULE, sizeof(struct sfire_chip), &card);
 129         if (ret < 0) {
 130                 dev_err(&intf->dev, "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
 138         chip = card->private_data;
 139         chips[regidx] = chip;
 140         chip->dev = device;
 141         chip->regidx = regidx;
 142         chip->intf_count = 1;
 143         chip->card = card;
 144
 145         ret = usb6fire_comm_init(chip);
 146         if (ret < 0) {
 147                 usb6fire_chip_destroy(chip);
 148                 return ret;
 149         }
 150
 151         ret = usb6fire_midi_init(chip);
 152         if (ret < 0) {
 153                 usb6fire_chip_destroy(chip);
 154                 return ret;
 155         }
 156
 157         ret = usb6fire_pcm_init(chip);
 158         if (ret < 0) {
 159                 usb6fire_chip_destroy(chip);
 160                 return ret;
 161         }
 162
 163         ret = usb6fire_control_init(chip);
 164         if (ret < 0) {
 165                 usb6fire_chip_destroy(chip);
 166                 return ret;
 167         }
 168
 169         ret = snd_card_register(card);
 170         if (ret < 0) {
 171                 dev_err(&intf->dev, "cannot register card.");
 172                 usb6fire_chip_destroy(chip);
 173                 return ret;
 174         }
 175         usb_set_intfdata(intf, chip);
 176         return 0;
 177 }
 178
 179 static void usb6fire_chip_disconnect(struct usb_interface *intf)
 180 {
 181         struct sfire_chip *chip;
 182         struct snd_card *card;
 183
 184         chip = usb_get_intfdata(intf);
 185         if (chip) { /* if !chip, fw upload has been performed */
 186                 card = chip->card;
 187                 chip->intf_count--;
 188                 if (!chip->intf_count) {
 189                         mutex_lock(&register_mutex);
 190                         devices[chip->regidx] = NULL;
 191                         chips[chip->regidx] = NULL;
 192                         mutex_unlock(&register_mutex);
 193
 194                         chip->shutdown = true;
 195                         usb6fire_chip_abort(chip);
 196                         usb6fire_chip_destroy(chip);
 197                 }
 198         }
 199 }
 200
 201 static struct usb_device_id device_table[] = {
 202         {
 203                 .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
 204                 .idVendor = 0x0ccd,
 205                 .idProduct = 0x0080
 206         },
 207         {}
 208 };
 209
 210 MODULE_DEVICE_TABLE(usb, device_table);
 211
 212 static struct usb_driver usb_driver = {
 213         .name = "snd-usb-6fire",
 214         .probe = usb6fire_chip_probe,
 215         .disconnect = usb6fire_chip_disconnect,
 216         .id_table = device_table,
 217 };
 218
 219 module_usb_driver(usb_driver);