sound/usb/6fire/chip.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Linux driver for TerraTec DMX 6Fire USB
   4  *
   5  * Main routines and module definitions.
   6  *
   7  * Author:      Torsten Schenk <torsten.schenk@zoho.com>
   8  * Created:     Jan 01, 2011
   9  * Copyright:   (C) Torsten Schenk
  10  */
  11
  12 #include "chip.h"
  13 #include "firmware.h"
  14 #include "pcm.h"
  15 #include "control.h"
  16 #include "comm.h"
  17 #include "midi.h"
  18
  19 #include <linux/moduleparam.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/module.h>
  22 #include <linux/init.h>
  23 #include <linux/gfp.h>
  24 #include <sound/initval.h>
  25
  26 MODULE_AUTHOR("Torsten Schenk <torsten.schenk@zoho.com>");
  27 MODULE_DESCRIPTION("TerraTec DMX 6Fire USB audio driver");
  28 MODULE_LICENSE("GPL v2");
  29 MODULE_SUPPORTED_DEVICE("{{TerraTec,DMX 6Fire USB}}");
  30
  31 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-max */
  32 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* Id for card */
  33 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable card */
  34 static struct sfire_chip *chips[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
  35 static struct usb_device *devices[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
  36
  37 module_param_array(index, int, NULL, 0444);
  38 MODULE_PARM_DESC(index, "Index value for the 6fire sound device");
  39 module_param_array(id, charp, NULL, 0444);
  40 MODULE_PARM_DESC(id, "ID string for the 6fire sound device.");
  41 module_param_array(enable, bool, NULL, 0444);
  42 MODULE_PARM_DESC(enable, "Enable the 6fire sound device.");
  43
  44 static DEFINE_MUTEX(register_mutex);
  45
  46 static void usb6fire_chip_abort(struct sfire_chip *chip)
  47 {
  48         if (chip) {
  49                 if (chip->pcm)
  50                         usb6fire_pcm_abort(chip);
  51                 if (chip->midi)
  52                         usb6fire_midi_abort(chip);
  53                 if (chip->comm)
  54                         usb6fire_comm_abort(chip);
  55                 if (chip->control)
  56                         usb6fire_control_abort(chip);
  57                 if (chip->card) {
  58                         snd_card_disconnect(chip->card);
  59                         snd_card_free_when_closed(chip->card);
  60                         chip->card = NULL;
  61                 }
  62         }
  63 }
  64
  65 static void usb6fire_chip_destroy(struct sfire_chip *chip)
  66 {
  67         if (chip) {
  68                 if (chip->pcm)
  69                         usb6fire_pcm_destroy(chip);
  70                 if (chip->midi)
  71                         usb6fire_midi_destroy(chip);
  72                 if (chip->comm)
  73                         usb6fire_comm_destroy(chip);
  74                 if (chip->control)
  75                         usb6fire_control_destroy(chip);
  76                 if (chip->card)
  77                         snd_card_free(chip->card);
  78         }
  79 }
  80
  81 static int usb6fire_chip_probe(struct usb_interface *intf,
  82                                const struct usb_device_id *usb_id)
  83 {
  84         int ret;
  85         int i;
  86         struct sfire_chip *chip = NULL;
  87         struct usb_device *device = interface_to_usbdev(intf);
  88         int regidx = -1; /* index in module parameter array */
  89         struct snd_card *card = NULL;
  90
  91         /* look if we already serve this card and return if so */
  92         mutex_lock(&register_mutex);
  93         for (i = 0; i < SNDRV_CARDS; i++) {
  94                 if (devices[i] == device) {
  95                         if (chips[i])
  96                                 chips[i]->intf_count++;
  97                         usb_set_intfdata(intf, chips[i]);
  98                         mutex_unlock(&register_mutex);
  99                         return 0;
 100                 } else if (!devices[i] && regidx < 0)
 101                         regidx = i;
 102         }
 103         if (regidx < 0) {
 104                 mutex_unlock(&register_mutex);
 105                 dev_err(&intf->dev, "too many cards registered.\n");
 106                 return -ENODEV;
 107         }
 108         devices[regidx] = device;
 109         mutex_unlock(&register_mutex);
 110
 111         /* check, if firmware is present on device, upload it if not */
 112         ret = usb6fire_fw_init(intf);
 113         if (ret < 0)
 114                 return ret;
 115         else if (ret == FW_NOT_READY) /* firmware update performed */
 116                 return 0;
 117
 118         /* if we are here, card can be registered in alsa. */
 119         if (usb_set_interface(device, 0, 0) != 0) {
 120                 dev_err(&intf->dev, "can't set first interface.\n");
 121                 return -EIO;
 122         }
 123         ret = snd_card_new(&intf->dev, index[regidx], id[regidx],
 124                            THIS_MODULE, sizeof(struct sfire_chip), &card);
 125         if (ret < 0) {
 126                 dev_err(&intf->dev, "cannot create alsa card.\n");
 127                 return ret;
 128         }
 129         strcpy(card->driver, "6FireUSB");
 130         strcpy(card->shortname, "TerraTec DMX6FireUSB");
 131         sprintf(card->longname, "%s at %d:%d", card->shortname,
 132                         device->bus->busnum, device->devnum);
 133
 134         chip = card->private_data;
 135         chips[regidx] = chip;
 136         chip->dev = device;
 137         chip->regidx = regidx;
 138         chip->intf_count = 1;
 139         chip->card = card;
 140
 141         ret = usb6fire_comm_init(chip);
 142         if (ret < 0)
 143                 goto destroy_chip;
 144
 145         ret = usb6fire_midi_init(chip);
 146         if (ret < 0)
 147                 goto destroy_chip;
 148
 149         ret = usb6fire_pcm_init(chip);
 150         if (ret < 0)
 151                 goto destroy_chip;
 152
 153         ret = usb6fire_control_init(chip);
 154         if (ret < 0)
 155                 goto destroy_chip;
 156
 157         ret = snd_card_register(card);
 158         if (ret < 0) {
 159                 dev_err(&intf->dev, "cannot register card.");
 160                 goto destroy_chip;
 161         }
 162         usb_set_intfdata(intf, chip);
 163         return 0;
 164
 165 destroy_chip:
 166         usb6fire_chip_destroy(chip);
 167         return ret;
 168 }
 169
 170 static void usb6fire_chip_disconnect(struct usb_interface *intf)
 171 {
 172         struct sfire_chip *chip;
 173
 174         chip = usb_get_intfdata(intf);
 175         if (chip) { /* if !chip, fw upload has been performed */
 176                 chip->intf_count--;
 177                 if (!chip->intf_count) {
 178                         mutex_lock(&register_mutex);
 179                         devices[chip->regidx] = NULL;
 180                         chips[chip->regidx] = NULL;
 181                         mutex_unlock(&register_mutex);
 182
 183                         chip->shutdown = true;
 184                         usb6fire_chip_abort(chip);
 185                         usb6fire_chip_destroy(chip);
 186                 }
 187         }
 188 }
 189
 190 static const struct usb_device_id device_table[] = {
 191         {
 192                 .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
 193                 .idVendor = 0x0ccd,
 194                 .idProduct = 0x0080
 195         },
 196         {}
 197 };
 198
 199 MODULE_DEVICE_TABLE(usb, device_table);
 200
 201 static struct usb_driver usb_driver = {
 202         .name = "snd-usb-6fire",
 203         .probe = usb6fire_chip_probe,
 204         .disconnect = usb6fire_chip_disconnect,
 205         .id_table = device_table,
 206 };
 207
 208 module_usb_driver(usb_driver);