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

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