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 30 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-max */ 31 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* Id for card */ 32 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable card */ 33 static struct sfire_chip *chips[SNDRV_CARDS] = SNDRV_DEFAULT_PTR; 34 static struct usb_device *devices[SNDRV_CARDS] = SNDRV_DEFAULT_PTR; 35 36 module_param_array(index, int, NULL, 0444); 37 MODULE_PARM_DESC(index, "Index value for the 6fire sound device"); 38 module_param_array(id, charp, NULL, 0444); 39 MODULE_PARM_DESC(id, "ID string for the 6fire sound device."); 40 module_param_array(enable, bool, NULL, 0444); 41 MODULE_PARM_DESC(enable, "Enable the 6fire sound device."); 42 43 static DEFINE_MUTEX(register_mutex); 44 45 static void usb6fire_chip_abort(struct sfire_chip *chip) 46 { 47 if (chip) { 48 if (chip->pcm) 49 usb6fire_pcm_abort(chip); 50 if (chip->midi) 51 usb6fire_midi_abort(chip); 52 if (chip->comm) 53 usb6fire_comm_abort(chip); 54 if (chip->control) 55 usb6fire_control_abort(chip); 56 if (chip->card) { 57 snd_card_disconnect(chip->card); 58 snd_card_free_when_closed(chip->card); 59 chip->card = NULL; 60 } 61 } 62 } 63 64 static void usb6fire_card_free(struct snd_card *card) 65 { 66 struct sfire_chip *chip = card->private_data; 67 68 if (chip) { 69 if (chip->pcm) 70 usb6fire_pcm_destroy(chip); 71 if (chip->midi) 72 usb6fire_midi_destroy(chip); 73 if (chip->comm) 74 usb6fire_comm_destroy(chip); 75 if (chip->control) 76 usb6fire_control_destroy(chip); 77 } 78 } 79 80 static int usb6fire_chip_probe(struct usb_interface *intf, 81 const struct usb_device_id *usb_id) 82 { 83 int ret; 84 int i; 85 struct sfire_chip *chip = NULL; 86 struct usb_device *device = interface_to_usbdev(intf); 87 int regidx = -1; /* index in module parameter array */ 88 struct snd_card *card = NULL; 89 90 /* look if we already serve this card and return if so */ 91 scoped_guard(mutex, ®ister_mutex) { 92 for (i = 0; i < SNDRV_CARDS; i++) { 93 if (devices[i] == device) { 94 if (chips[i]) 95 chips[i]->intf_count++; 96 usb_set_intfdata(intf, chips[i]); 97 return 0; 98 } else if (!devices[i] && regidx < 0) 99 regidx = i; 100 } 101 if (regidx < 0) { 102 dev_err(&intf->dev, "too many cards registered.\n"); 103 return -ENODEV; 104 } 105 devices[regidx] = device; 106 } 107 108 /* check, if firmware is present on device, upload it if not */ 109 ret = usb6fire_fw_init(intf); 110 if (ret < 0) 111 return ret; 112 else if (ret == FW_NOT_READY) /* firmware update performed */ 113 return 0; 114 115 /* if we are here, card can be registered in alsa. */ 116 if (usb_set_interface(device, 0, 0) != 0) { 117 dev_err(&intf->dev, "can't set first interface.\n"); 118 return -EIO; 119 } 120 ret = snd_card_new(&intf->dev, index[regidx], id[regidx], 121 THIS_MODULE, sizeof(struct sfire_chip), &card); 122 if (ret < 0) { 123 dev_err(&intf->dev, "cannot create alsa card.\n"); 124 return ret; 125 } 126 strscpy(card->driver, "6FireUSB"); 127 strscpy(card->shortname, "TerraTec DMX6FireUSB"); 128 sprintf(card->longname, "%s at %d:%d", card->shortname, 129 device->bus->busnum, device->devnum); 130 131 chip = card->private_data; 132 chips[regidx] = chip; 133 chip->dev = device; 134 chip->regidx = regidx; 135 chip->intf_count = 1; 136 chip->card = card; 137 card->private_free = usb6fire_card_free; 138 139 ret = usb6fire_comm_init(chip); 140 if (ret < 0) 141 goto destroy_chip; 142 143 ret = usb6fire_midi_init(chip); 144 if (ret < 0) 145 goto destroy_chip; 146 147 ret = usb6fire_pcm_init(chip); 148 if (ret < 0) 149 goto destroy_chip; 150 151 ret = usb6fire_control_init(chip); 152 if (ret < 0) 153 goto destroy_chip; 154 155 ret = snd_card_register(card); 156 if (ret < 0) { 157 dev_err(&intf->dev, "cannot register card."); 158 goto destroy_chip; 159 } 160 usb_set_intfdata(intf, chip); 161 return 0; 162 163 destroy_chip: 164 snd_card_free(card); 165 return ret; 166 } 167 168 static void usb6fire_chip_disconnect(struct usb_interface *intf) 169 { 170 struct sfire_chip *chip; 171 172 chip = usb_get_intfdata(intf); 173 if (chip) { /* if !chip, fw upload has been performed */ 174 chip->intf_count--; 175 if (!chip->intf_count) { 176 scoped_guard(mutex, ®ister_mutex) { 177 devices[chip->regidx] = NULL; 178 chips[chip->regidx] = NULL; 179 } 180 181 chip->shutdown = true; 182 usb6fire_chip_abort(chip); 183 } 184 } 185 } 186 187 static const struct usb_device_id device_table[] = { 188 { 189 .match_flags = USB_DEVICE_ID_MATCH_DEVICE, 190 .idVendor = 0x0ccd, 191 .idProduct = 0x0080 192 }, 193 {} 194 }; 195 196 MODULE_DEVICE_TABLE(usb, device_table); 197 198 static struct usb_driver usb_driver = { 199 .name = "snd-usb-6fire", 200 .probe = usb6fire_chip_probe, 201 .disconnect = usb6fire_chip_disconnect, 202 .id_table = device_table, 203 }; 204 205 module_usb_driver(usb_driver); 206