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 (!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
179static 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
201static 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
210MODULE_DEVICE_TABLE(usb, device_table);
211
212static 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
219module_usb_driver(usb_driver);
220