// SPDX-License-Identifier: GPL-2.0-or-later /* * usbusx2y.c - ALSA USB US-428 Driver * 2005-04-14 Karsten Wiese Version 0.8.7.2: Call snd_card_free() instead of snd_card_free_in_thread() to prevent oops with dead keyboard symptom. Tested ok with kernel 2.6.12-rc2. 2004-12-14 Karsten Wiese Version 0.8.7.1: snd_pcm_open for rawusb pcm-devices now returns -EBUSY if called without rawusb's hwdep device being open. 2004-12-02 Karsten Wiese Version 0.8.7: Use macro usb_maxpacket() for portability. 2004-10-26 Karsten Wiese Version 0.8.6: wake_up() process waiting in usx2y_urbs_start() on error. 2004-10-21 Karsten Wiese Version 0.8.5: nrpacks is runtime or compiletime configurable now with tested values from 1 to 4. 2004-10-03 Karsten Wiese Version 0.8.2: Avoid any possible racing while in prepare callback. 2004-09-30 Karsten Wiese Version 0.8.0: Simplified things and made ohci work again. 2004-09-20 Karsten Wiese Version 0.7.3: Use usb_kill_urb() instead of deprecated (kernel 2.6.9) usb_unlink_urb(). 2004-07-13 Karsten Wiese Version 0.7.1: Don't sleep in START/STOP callbacks anymore. us428 channels C/D not handled just for this version, sorry. 2004-06-21 Karsten Wiese Version 0.6.4: Temporarely suspend midi input to sanely call usb_set_interface() when setting format. 2004-06-12 Karsten Wiese Version 0.6.3: Made it thus the following rule is enforced: "All pcm substreams of one usx2y have to operate at the same rate & format." 2004-04-06 Karsten Wiese Version 0.6.0: Runs on 2.6.5 kernel without any "--with-debug=" things. us224 reported running. 2004-01-14 Karsten Wiese Version 0.5.1: Runs with 2.6.1 kernel. 2003-12-30 Karsten Wiese Version 0.4.1: Fix 24Bit 4Channel capturing for the us428. 2003-11-27 Karsten Wiese, Martin Langer Version 0.4: us122 support. us224 could be tested by uncommenting the sections containing USB_ID_US224 2003-11-03 Karsten Wiese Version 0.3: 24Bit support. "arecord -D hw:1 -c 2 -r 48000 -M -f S24_3LE|aplay -D hw:1 -c 2 -r 48000 -M -f S24_3LE" works. 2003-08-22 Karsten Wiese Version 0.0.8: Removed EZUSB Firmware. First Stage Firmwaredownload is now done by tascam-firmware downloader. See: http://usb-midi-fw.sourceforge.net/tascam-firmware.tar.gz 2003-06-18 Karsten Wiese Version 0.0.5: changed to compile with kernel 2.4.21 and alsa 0.9.4 2002-10-16 Karsten Wiese Version 0.0.4: compiles again with alsa-current. USB_ISO_ASAP not used anymore (most of the time), instead urb->start_frame is calculated here now, some calls inside usb-driver don't need to happen anymore. To get the best out of this: Disable APM-support in the kernel as APM-BIOS calls (once each second) hard disable interrupt for many precious milliseconds. This helped me much on my slowish PII 400 & PIII 500. ACPI yet untested but might cause the same bad behaviour. Use a kernel with lowlatency and preemptiv patches applied. To autoload snd-usb-midi append a line post-install snd-usb-us428 modprobe snd-usb-midi to /etc/modules.conf. known problems: sliders, knobs, lights not yet handled except MASTER Volume slider. "pcm -c 2" doesn't work. "pcm -c 2 -m direct_interleaved" does. KDE3: "Enable full duplex operation" deadlocks. 2002-08-31 Karsten Wiese Version 0.0.3: audio also simplex; simplifying: iso urbs only 1 packet, melted structs. ASYNC_UNLINK not used anymore: no more crashes so far..... for alsa 0.9 rc3. 2002-08-09 Karsten Wiese Version 0.0.2: midi works with snd-usb-midi, audio (only fullduplex now) with i.e. bristol. The firmware has been sniffed from win2k us-428 driver 3.09. * Copyright (c) 2002 - 2004 Karsten Wiese */ #include <linux/init.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/slab.h> #include <linux/interrupt.h> #include <linux/usb.h> #include <sound/core.h> #include <sound/initval.h> #include <sound/pcm.h> #include <sound/rawmidi.h> #include "usx2y.h" #include "usbusx2y.h" #include "usX2Yhwdep.h" MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; static int index[SNDRV_CARDS] = …; /* Index 0-max */ static char *id[SNDRV_CARDS] = …; /* Id for this card */ static bool enable[SNDRV_CARDS] = …; /* Enable this card */ module_param_array(…); MODULE_PARM_DESC(…) …; module_param_array(…); MODULE_PARM_DESC(…) …; module_param_array(…); MODULE_PARM_DESC(…) …; static int snd_usx2y_card_used[SNDRV_CARDS]; static void snd_usx2y_card_private_free(struct snd_card *card); static void usx2y_unlinkseq(struct snd_usx2y_async_seq *s); /* * pipe 4 is used for switching the lamps, setting samplerate, volumes .... */ static void i_usx2y_out04_int(struct urb *urb) { … } static void i_usx2y_in04_int(struct urb *urb) { … } /* * Prepare some urbs */ int usx2y_async_seq04_init(struct usx2ydev *usx2y) { … } int usx2y_in04_init(struct usx2ydev *usx2y) { … } static void usx2y_unlinkseq(struct snd_usx2y_async_seq *s) { … } static const struct usb_device_id snd_usx2y_usb_id_table[] = …; MODULE_DEVICE_TABLE(usb, snd_usx2y_usb_id_table); static int usx2y_create_card(struct usb_device *device, struct usb_interface *intf, struct snd_card **cardp) { … } static void snd_usx2y_card_private_free(struct snd_card *card) { … } static void snd_usx2y_disconnect(struct usb_interface *intf) { … } static int snd_usx2y_probe(struct usb_interface *intf, const struct usb_device_id *id) { … } static struct usb_driver snd_usx2y_usb_driver = …; module_usb_driver(…) …;
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