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
usb6fire_chip_abort(struct sfire_chip * chip)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
usb6fire_chip_destroy(struct sfire_chip * chip)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
usb6fire_chip_probe(struct usb_interface * intf,const struct usb_device_id * usb_id)85 static int __devinit 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(®ister_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(®ister_mutex);
103 return 0;
104 } else if (!devices[i] && regidx < 0)
105 regidx = i;
106 }
107 if (regidx < 0) {
108 mutex_unlock(®ister_mutex);
109 snd_printk(KERN_ERR PREFIX "too many cards registered.\n");
110 return -ENODEV;
111 }
112 devices[regidx] = device;
113 mutex_unlock(®ister_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
usb6fire_chip_disconnect(struct usb_interface * intf)180 static 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(®ister_mutex);
191 devices[chip->regidx] = NULL;
192 chips[chip->regidx] = NULL;
193 mutex_unlock(®ister_mutex);
194
195 chip->shutdown = true;
196 usb6fire_chip_abort(chip);
197 usb6fire_chip_destroy(chip);
198 }
199 }
200 }
201
202 static 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
211 MODULE_DEVICE_TABLE(usb, device_table);
212
213 static 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
220 module_usb_driver(usb_driver);
221