ALSA: usb/6fire - Driver for TerraTec DMX 6Fire USB

What is working: Everything except SPDIF
- Hardware Master volume
- PCM 44-192kHz@24 bits, 6 channels out, 4 channels in (analog)
- MIDI in/out
- firmware loading after cold start
- phono/line switching

Signed-off-by: Torsten Schenk <torsten.schenk@zoho.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 232 insertions, 0 deletions

diff --git a/sound/usb/6fire/chip.c b/sound/usb/6fire/chip.c
new file mode 100644
index 000000000000..c7dca7b0b9fe
--- /dev/null
+++ b/sound/usb/6fire/chip.c
@@ -0,0 +1,232 @@
+/*
+ * Linux driver for TerraTec DMX 6Fire USB
+ *
+ * Main routines and module definitions.
+ *
+ * Author:      Torsten Schenk <torsten.schenk@zoho.com>
+ * Created:     Jan 01, 2011
+ * Version:     0.3.0
+ * Copyright:   (C) Torsten Schenk
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include "chip.h"
+#include "firmware.h"
+#include "pcm.h"
+#include "control.h"
+#include "comm.h"
+#include "midi.h"
+
+#include <linux/moduleparam.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/gfp.h>
+#include <sound/initval.h>
+
+MODULE_AUTHOR("Torsten Schenk <torsten.schenk@zoho.com>");
+MODULE_DESCRIPTION("TerraTec DMX 6Fire USB audio driver, version 0.3.0");
+MODULE_LICENSE("GPL v2");
+MODULE_SUPPORTED_DEVICE("{{TerraTec, DMX 6Fire USB}}");
+
+static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-max */
+static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* Id for card */
+static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable card */
+static struct sfire_chip *chips[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
+static struct usb_device *devices[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
+
+module_param_array(index, int, NULL, 0444);
+MODULE_PARM_DESC(index, "Index value for the 6fire sound device");
+module_param_array(id, charp, NULL, 0444);
+MODULE_PARM_DESC(id, "ID string for the 6fire sound device.");
+module_param_array(enable, bool, NULL, 0444);
+MODULE_PARM_DESC(enable, "Enable the 6fire sound device.");
+
+static DEFINE_MUTEX(register_mutex);
+
+static void usb6fire_chip_abort(struct sfire_chip *chip)
+{
+        if (chip) {
+                if (chip->pcm)
+                        usb6fire_pcm_abort(chip);
+                if (chip->midi)
+                        usb6fire_midi_abort(chip);
+                if (chip->comm)
+                        usb6fire_comm_abort(chip);
+                if (chip->control)
+                        usb6fire_control_abort(chip);
+                if (chip->card) {
+                        snd_card_disconnect(chip->card);
+                        snd_card_free_when_closed(chip->card);
+                        chip->card = NULL;
+                }
+        }
+}
+
+static void usb6fire_chip_destroy(struct sfire_chip *chip)
+{
+        if (chip) {
+                if (chip->pcm)
+                        usb6fire_pcm_destroy(chip);
+                if (chip->midi)
+                        usb6fire_midi_destroy(chip);
+                if (chip->comm)
+                        usb6fire_comm_destroy(chip);
+                if (chip->control)
+                        usb6fire_control_destroy(chip);
+                if (chip->card)
+                        snd_card_free(chip->card);
+        }
+}
+
+static int __devinit usb6fire_chip_probe(struct usb_interface *intf,
+                const struct usb_device_id *usb_id)
+{
+        int ret;
+        int i;
+        struct sfire_chip *chip = NULL;
+        struct usb_device *device = interface_to_usbdev(intf);
+        int regidx = -1; /* index in module parameter array */
+        struct snd_card *card = NULL;
+
+        /* look if we already serve this card and return if so */
+        mutex_lock(&register_mutex);
+        for (i = 0; i < SNDRV_CARDS; i++) {
+                if (devices[i] == device) {
+                        if (chips[i])
+                                chips[i]->intf_count++;
+                        usb_set_intfdata(intf, chips[i]);
+                        mutex_unlock(&register_mutex);
+                        return 0;
+                } else if (regidx < 0)
+                        regidx = i;
+        }
+        if (regidx < 0) {
+                mutex_unlock(&register_mutex);
+                snd_printk(KERN_ERR PREFIX "too many cards registered.\n");
+                return -ENODEV;
+        }
+        devices[regidx] = device;
+        mutex_unlock(&register_mutex);
+
+        /* check, if firmware is present on device, upload it if not */
+        ret = usb6fire_fw_init(intf);
+        if (ret < 0)
+                return ret;
+        else if (ret == FW_NOT_READY) /* firmware update performed */
+                return 0;
+
+        /* if we are here, card can be registered in alsa. */
+        if (usb_set_interface(device, 0, 0) != 0) {
+                snd_printk(KERN_ERR PREFIX "can't set first interface.\n");
+                return -EIO;
+        }
+        ret = snd_card_create(index[regidx], id[regidx], THIS_MODULE,
+                        sizeof(struct sfire_chip), &card);
+        if (ret < 0) {
+                snd_printk(KERN_ERR PREFIX "cannot create alsa card.\n");
+                return ret;
+        }
+        strcpy(card->driver, "6FireUSB");
+        strcpy(card->shortname, "TerraTec DMX6FireUSB");
+        sprintf(card->longname, "%s at %d:%d", card->shortname,
+                        device->bus->busnum, device->devnum);
+        snd_card_set_dev(card, &intf->dev);
+
+        chip = card->private_data;
+        chips[regidx] = chip;
+        chip->dev = device;
+        chip->regidx = regidx;
+        chip->intf_count = 1;
+        chip->card = card;
+
+        ret = usb6fire_comm_init(chip);
+        if (ret < 0) {
+                usb6fire_chip_destroy(chip);
+                return ret;
+        }
+
+        ret = usb6fire_midi_init(chip);
+        if (ret < 0) {
+                usb6fire_chip_destroy(chip);
+                return ret;
+        }
+
+        ret = usb6fire_pcm_init(chip);
+        if (ret < 0) {
+                usb6fire_chip_destroy(chip);
+                return ret;
+        }
+
+        ret = usb6fire_control_init(chip);
+        if (ret < 0) {
+                usb6fire_chip_destroy(chip);
+                return ret;
+        }
+
+        ret = snd_card_register(card);
+        if (ret < 0) {
+                snd_printk(KERN_ERR PREFIX "cannot register card.");
+                usb6fire_chip_destroy(chip);
+                return ret;
+        }
+        usb_set_intfdata(intf, chip);
+        return 0;
+}
+
+static void usb6fire_chip_disconnect(struct usb_interface *intf)
+{
+        struct sfire_chip *chip;
+        struct snd_card *card;
+
+        chip = usb_get_intfdata(intf);
+        if (chip) { /* if !chip, fw upload has been performed */
+                card = chip->card;
+                chip->intf_count--;
+                if (!chip->intf_count) {
+                        mutex_lock(&register_mutex);
+                        devices[chip->regidx] = NULL;
+                        chips[chip->regidx] = NULL;
+                        mutex_unlock(&register_mutex);
+
+                        chip->shutdown = true;
+                        usb6fire_chip_abort(chip);
+                        usb6fire_chip_destroy(chip);
+                }
+        }
+}
+
+static struct usb_device_id device_table[] = {
+        {
+                .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
+                .idVendor = 0x0ccd,
+                .idProduct = 0x0080
+        },
+        {}
+};
+
+MODULE_DEVICE_TABLE(usb, device_table);
+
+static struct usb_driver driver = {
+        .name = "snd-usb-6fire",
+        .probe = usb6fire_chip_probe,
+        .disconnect = usb6fire_chip_disconnect,
+        .id_table = device_table,
+};
+
+static int __init usb6fire_chip_init(void)
+{
+        return usb_register(&driver);
+}
+
+static void __exit usb6fire_chip_cleanup(void)
+{
+        usb_deregister(&driver);
+}
+
+module_init(usb6fire_chip_init);
+module_exit(usb6fire_chip_cleanup);