4394ae796356c2c46cce90e9e5e20707e85de06d
[linux-3.10.git] / 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 (regidx < 0)
105                         regidx = i;
106         }
107         if (regidx < 0) {
108                 mutex_unlock(&register_mutex);
109                 snd_printk(KERN_ERR PREFIX "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                 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
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(&register_mutex);
191                         devices[chip->regidx] = NULL;
192                         chips[chip->regidx] = NULL;
193                         mutex_unlock(&register_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);