| Message ID | 1392744496-31701-1-git-send-email-dev@kicherer.org (mailing list archive) |
|---|---|
| State | Changes Requested |
| Delegated to: | Takashi Iwai |
| Headers | show |
On 02/18/2014 06:28 PM, Mario Kicherer wrote: > This patch adds initial support for the Behringer BCD2000 USB DJ controller. > At the moment, only the MIDI part of the device is working, i.e. knobs, > buttons and LEDs. > > I also plan to add support for the audio part, but I assume that this will > require more effort than the rather simple MIDI interface. Progress can be > tracked at https://github.com/anyc/snd-usb-bcd2000. This looks good to me now. Reviewed-by: Daniel Mack <daniel@zonque.org> Thanks, Daniel > Changes since v3: > - applied style and snd_printk changes as suggested by Daniel Mack > > Changes since v2: > - applied more changes from Daniel Mack and Clemens Ladisch > > Changes since v1: > - fixed the various code style issues, thanks to Daniel Mack and > checkpatch.pl. > > Signed-off-by: Mario Kicherer <dev@kicherer.org> > --- > sound/usb/Kconfig | 13 ++ > sound/usb/Makefile | 2 +- > sound/usb/bcd2000/Makefile | 3 + > sound/usb/bcd2000/bcd2000.c | 488 ++++++++++++++++++++++++++++++++++++++++++++ > 4 files changed, 505 insertions(+), 1 deletion(-) > create mode 100644 sound/usb/bcd2000/Makefile > create mode 100644 sound/usb/bcd2000/bcd2000.c > > diff --git a/sound/usb/Kconfig b/sound/usb/Kconfig > index de9408b..145653a 100644 > --- a/sound/usb/Kconfig > +++ b/sound/usb/Kconfig > @@ -146,5 +146,18 @@ config SND_USB_HIFACE > To compile this driver as a module, choose M here: the module > will be called snd-usb-hiface. > > +config SND_BCD2000 > + tristate "Behringer BCD2000 MIDI driver" > + select SND_RAWMIDI > + help > + Say Y here to include MIDI support for the Behringer BCD2000 DJ > + controller. > + > + Audio support is still work-in-progress at > + https://github.com/anyc/snd-usb-bcd2000 > + > + To compile this driver as a module, choose M here: the module > + will be called snd-bcd2000. > + > endif # SND_USB > > diff --git a/sound/usb/Makefile b/sound/usb/Makefile > index abe668f..2b92f0d 100644 > --- a/sound/usb/Makefile > +++ b/sound/usb/Makefile > @@ -23,4 +23,4 @@ obj-$(CONFIG_SND_USB_UA101) += snd-usbmidi-lib.o > obj-$(CONFIG_SND_USB_USX2Y) += snd-usbmidi-lib.o > obj-$(CONFIG_SND_USB_US122L) += snd-usbmidi-lib.o > > -obj-$(CONFIG_SND) += misc/ usx2y/ caiaq/ 6fire/ hiface/ > +obj-$(CONFIG_SND) += misc/ usx2y/ caiaq/ 6fire/ hiface/ bcd2000/ > diff --git a/sound/usb/bcd2000/Makefile b/sound/usb/bcd2000/Makefile > new file mode 100644 > index 0000000..f09ccc0 > --- /dev/null > +++ b/sound/usb/bcd2000/Makefile > @@ -0,0 +1,3 @@ > +snd-bcd2000-y := bcd2000.o > + > +obj-$(CONFIG_SND_BCD2000) += snd-bcd2000.o > \ No newline at end of file > diff --git a/sound/usb/bcd2000/bcd2000.c b/sound/usb/bcd2000/bcd2000.c > new file mode 100644 > index 0000000..6965a89 > --- /dev/null > +++ b/sound/usb/bcd2000/bcd2000.c > @@ -0,0 +1,488 @@ > +/* > + * Behringer BCD2000 driver > + * > + * Copyright (C) 2014 Mario Kicherer (dev@kicherer.org) > + * > + * 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. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + */ > + > +#include <linux/kernel.h> > +#include <linux/errno.h> > +#include <linux/init.h> > +#include <linux/slab.h> > +#include <linux/module.h> > +#include <linux/usb.h> > +#include <linux/usb/audio.h> > +#include <sound/core.h> > +#include <sound/initval.h> > +#include <sound/rawmidi.h> > + > +#define DEVICE_NAME "Behringer BCD2000" > +#define DEVICE_SHORTNAME "bcd2000" > + > +#define PREFIX DEVICE_SHORTNAME ": " > +#define BUFSIZE 64 > + > +static struct usb_device_id id_table[] = { > + { USB_DEVICE(0x1397, 0x00bd) }, > + { }, > +}; > + > +static unsigned char device_cmd_prefix[] = {0x03, 0x00}; > + > +static unsigned char bcd2000_init_sequence[] = { > + 0x07, 0x00, 0x00, 0x00, 0x78, 0x48, 0x1c, 0x81, > + 0xc4, 0x00, 0x00, 0x00, 0x5e, 0x53, 0x4a, 0xf7, > + 0x18, 0xfa, 0x11, 0xff, 0x6c, 0xf3, 0x90, 0xff, > + 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, > + 0x18, 0xfa, 0x11, 0xff, 0x14, 0x00, 0x00, 0x00, > + 0x00, 0x00, 0x00, 0x00, 0xf2, 0x34, 0x4a, 0xf7, > + 0x18, 0xfa, 0x11, 0xff > +}; > + > +struct bcd2000 { > + struct usb_device *dev; > + struct snd_card *card; > + struct usb_interface *intf; > + int card_index; > + > + int midi_out_active; > + struct snd_rawmidi *rmidi; > + struct snd_rawmidi_substream *midi_receive_substream; > + struct snd_rawmidi_substream *midi_out_substream; > + > + unsigned char midi_in_buf[BUFSIZE]; > + unsigned char midi_out_buf[BUFSIZE]; > + > + struct urb *midi_out_urb; > + struct urb *midi_in_urb; > + > + struct usb_anchor anchor; > +}; > + > +static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; > +static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; > +static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; > + > +static DEFINE_MUTEX(devices_mutex); > +static unsigned int devices_used; > +static struct usb_driver bcd2000_driver; > + > +#ifdef CONFIG_SND_DEBUG > +static void bcd2000_dump_buffer(const char *prefix, const char *buf, int len) > +{ > + print_hex_dump(KERN_DEBUG, prefix, > + DUMP_PREFIX_NONE, 16, 1, > + buf, len, false); > +} > +#else > +static void bcd2000_dump_buffer(const char *prefix, const char *buf, int len) {} > +#endif > + > +static int bcd2000_midi_input_open(struct snd_rawmidi_substream *substream) > +{ > + return 0; > +} > + > +static int bcd2000_midi_input_close(struct snd_rawmidi_substream *substream) > +{ > + return 0; > +} > + > +/* register midi substream */ > +static void bcd2000_midi_input_trigger(struct snd_rawmidi_substream *substream, > + int up) > +{ > + struct bcd2000 *bcd2k = substream->rmidi->private_data; > + bcd2k->midi_receive_substream = up ? substream : NULL; > +} > + > +static void bcd2000_midi_handle_input(struct bcd2000 *bcd2k, > + const unsigned char *buf, unsigned int len) > +{ > + unsigned int length, tocopy; > + struct snd_rawmidi_substream *midi_receive_substream; > + > + midi_receive_substream = ACCESS_ONCE(bcd2k->midi_receive_substream); > + if (!midi_receive_substream) > + return; > + > + bcd2000_dump_buffer(PREFIX "received from device: ", buf, len); > + > + if (len < 2) > + return; > + > + /* > + * Packet structure: mm nn oo (pp) > + * mm: payload length > + * nn: MIDI command or note > + * oo: note or velocity > + * pp: velocity > + */ > + > + length = buf[0]; > + > + /* ignore packets without payload */ > + if (length == 0) > + return; > + > + tocopy = min(length, len-1); > + > + bcd2000_dump_buffer(PREFIX "sending to userspace: ", > + &buf[1], tocopy); > + > + snd_rawmidi_receive(midi_receive_substream, > + &buf[1], tocopy); > +} > + > +static void bcd2000_midi_send(struct bcd2000 *bcd2k, > + struct snd_rawmidi_substream *substream) > +{ > + int len, ret; > + > + BUILD_BUG_ON(sizeof(device_cmd_prefix) >= BUFSIZE); > + > + /* copy the "set LED" command bytes */ > + memcpy(bcd2k->midi_out_buf, device_cmd_prefix, > + sizeof(device_cmd_prefix)); > + > + /* > + * get MIDI packet and leave space for command prefix > + * and payload length > + */ > + len = snd_rawmidi_transmit(substream, > + bcd2k->midi_out_buf + 3, BUFSIZE - 3); > + > + if (len < 0) > + dev_err(&bcd2k->dev->dev, "%s: snd_rawmidi_transmit error %d\n", > + __func__, len); > + > + if (len <= 0) > + return; > + > + /* set payload length */ > + bcd2k->midi_out_buf[2] = len; > + bcd2k->midi_out_urb->transfer_buffer_length = BUFSIZE; > + > + bcd2000_dump_buffer(PREFIX "sending to device: ", > + bcd2k->midi_out_buf, len+3); > + > + /* send packet to the BCD2000 */ > + ret = usb_submit_urb(bcd2k->midi_out_urb, GFP_ATOMIC); > + if (ret < 0) > + dev_err(&bcd2k->dev->dev, PREFIX > + "%s (%p): usb_submit_urb() failed, ret=%d, len=%d\n", > + __func__, substream, ret, len); > + else > + bcd2k->midi_out_active = 1; > +} > + > +static int bcd2000_midi_output_open(struct snd_rawmidi_substream *substream) > +{ > + return 0; > +} > + > +static int bcd2000_midi_output_close(struct snd_rawmidi_substream *substream) > +{ > + struct bcd2000 *bcd2k = substream->rmidi->private_data; > + > + if (bcd2k->midi_out_active) { > + usb_kill_urb(bcd2k->midi_out_urb); > + bcd2k->midi_out_active = 0; > + } > + > + return 0; > +} > + > +/* register midi substream */ > +static void bcd2000_midi_output_trigger(struct snd_rawmidi_substream *substream, > + int up) > +{ > + struct bcd2000 *bcd2k = substream->rmidi->private_data; > + > + if (up) { > + bcd2k->midi_out_substream = substream; > + /* check if there is data userspace wants to send */ > + if (!bcd2k->midi_out_active) > + bcd2000_midi_send(bcd2k, substream); > + } else { > + bcd2k->midi_out_substream = NULL; > + } > +} > + > +static void bcd2000_output_complete(struct urb *urb) > +{ > + struct bcd2000 *bcd2k = urb->context; > + struct snd_rawmidi_substream *midi_out_substream; > + > + bcd2k->midi_out_active = 0; > + > + if (urb->status != 0) > + dev_err(&urb->dev->dev, > + PREFIX "output urb->status: %d\n", urb->status); > + > + midi_out_substream = ACCESS_ONCE(bcd2k->midi_out_substream); > + if (!midi_out_substream) > + return; > + > + /* check if there is more data userspace wants to send */ > + bcd2000_midi_send(bcd2k, midi_out_substream); > +} > + > +static void bcd2000_input_complete(struct urb *urb) > +{ > + int ret; > + struct device *dev = &urb->dev->dev; > + struct bcd2000 *bcd2k = urb->context; > + > + if (urb->status) { > + dev_warn(dev, PREFIX "input urb->status: %i\n", urb->status); > + return; > + } > + > + if (!bcd2k) > + return; > + > + if (urb->actual_length > 0) > + bcd2000_midi_handle_input(bcd2k, urb->transfer_buffer, > + urb->actual_length); > + > + /* acknowledge received packet */ > + ret = usb_submit_urb(bcd2k->midi_in_urb, GFP_ATOMIC); > + if (ret < 0) > + dev_err(dev, "unable to submit urb. OOM!?\n"); > +} > + > +static struct snd_rawmidi_ops bcd2000_midi_output = { > + .open = bcd2000_midi_output_open, > + .close = bcd2000_midi_output_close, > + .trigger = bcd2000_midi_output_trigger, > +}; > + > +static struct snd_rawmidi_ops bcd2000_midi_input = { > + .open = bcd2000_midi_input_open, > + .close = bcd2000_midi_input_close, > + .trigger = bcd2000_midi_input_trigger, > +}; > + > +static void bcd2000_init_device(struct bcd2000 *bcd2k) > +{ > + int ret; > + > + init_usb_anchor(&bcd2k->anchor); > + usb_anchor_urb(bcd2k->midi_out_urb, &bcd2k->anchor); > + usb_anchor_urb(bcd2k->midi_in_urb, &bcd2k->anchor); > + > + /* copy init sequence into buffer */ > + memcpy(bcd2k->midi_out_buf, bcd2000_init_sequence, 52); > + bcd2k->midi_out_urb->transfer_buffer_length = 52; > + > + /* submit sequence */ > + ret = usb_submit_urb(bcd2k->midi_out_urb, GFP_KERNEL); > + if (ret < 0) > + dev_err(&bcd2k->dev->dev, PREFIX > + "%s: usb_submit_urb() out failed, ret=%d: ", > + __func__, ret); > + else > + bcd2k->midi_out_active = 1; > + > + /* send empty packet to enable button and controller events */ > + ret = usb_submit_urb(bcd2k->midi_in_urb, GFP_KERNEL); > + if (ret < 0) > + dev_err(&bcd2k->dev->dev, PREFIX > + "%s: usb_submit_urb() in failed, ret=%d: ", > + __func__, ret); > + > + /* ensure initialization is finished */ > + usb_wait_anchor_empty_timeout(&bcd2k->anchor, 1000); > +} > + > +static int bcd2000_init_midi(struct bcd2000 *bcd2k) > +{ > + int ret; > + struct snd_rawmidi *rmidi; > + > + ret = snd_rawmidi_new(bcd2k->card, bcd2k->card->shortname, 0, > + 1, /* output */ > + 1, /* input */ > + &rmidi); > + > + if (ret < 0) > + return ret; > + > + strlcpy(rmidi->name, bcd2k->card->shortname, sizeof(rmidi->name)); > + > + rmidi->info_flags = SNDRV_RAWMIDI_INFO_DUPLEX; > + rmidi->private_data = bcd2k; > + > + rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; > + snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, > + &bcd2000_midi_output); > + > + rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; > + snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, > + &bcd2000_midi_input); > + > + bcd2k->rmidi = rmidi; > + > + bcd2k->midi_in_urb = usb_alloc_urb(0, GFP_KERNEL); > + bcd2k->midi_out_urb = usb_alloc_urb(0, GFP_KERNEL); > + > + if (!bcd2k->midi_in_urb || !bcd2k->midi_out_urb) { > + dev_err(&bcd2k->dev->dev, PREFIX "usb_alloc_urb failed\n"); > + return -ENOMEM; > + } > + > + usb_fill_int_urb(bcd2k->midi_in_urb, bcd2k->dev, > + usb_rcvintpipe(bcd2k->dev, 0x81), > + bcd2k->midi_in_buf, BUFSIZE, > + bcd2000_input_complete, bcd2k, 1); > + > + usb_fill_int_urb(bcd2k->midi_out_urb, bcd2k->dev, > + usb_sndintpipe(bcd2k->dev, 0x1), > + bcd2k->midi_out_buf, BUFSIZE, > + bcd2000_output_complete, bcd2k, 1); > + > + bcd2000_init_device(bcd2k); > + > + return 0; > +} > + > +static void bcd2000_free_usb_related_resources(struct bcd2000 *bcd2k, > + struct usb_interface *interface) > +{ > + /* usb_kill_urb not necessary, urb is aborted automatically */ > + > + usb_free_urb(bcd2k->midi_out_urb); > + usb_free_urb(bcd2k->midi_in_urb); > + > + if (bcd2k->intf) { > + usb_set_intfdata(bcd2k->intf, NULL); > + bcd2k->intf = NULL; > + } > +} > + > +static int bcd2000_probe(struct usb_interface *interface, > + const struct usb_device_id *usb_id) > +{ > + struct snd_card *card; > + struct bcd2000 *bcd2k; > + unsigned int card_index; > + char usb_path[32]; > + int err; > + > + mutex_lock(&devices_mutex); > + > + for (card_index = 0; card_index < SNDRV_CARDS; ++card_index) > + if (enable[card_index] && !(devices_used & (1 << card_index))) > + break; > + > + if (card_index >= SNDRV_CARDS) { > + mutex_unlock(&devices_mutex); > + return -ENOENT; > + } > + > + err = snd_card_create(index[card_index], id[card_index], THIS_MODULE, > + sizeof(*bcd2k), &card); > + if (err < 0) { > + mutex_unlock(&devices_mutex); > + return err; > + } > + > + bcd2k = card->private_data; > + bcd2k->dev = interface_to_usbdev(interface); > + bcd2k->card = card; > + bcd2k->card_index = card_index; > + bcd2k->intf = interface; > + > + snd_card_set_dev(card, &interface->dev); > + > + strcpy(card->driver, DEVICE_NAME); > + strcpy(card->shortname, DEVICE_SHORTNAME); > + usb_make_path(bcd2k->dev, usb_path, sizeof(usb_path)); > + snprintf(bcd2k->card->longname, sizeof(bcd2k->card->longname), > + DEVICE_NAME ", at %s", > + usb_path); > + > + dev_info(&bcd2k->dev->dev, PREFIX "%s", bcd2k->card->longname); > + > + err = bcd2000_init_midi(bcd2k); > + if (err < 0) > + goto probe_error; > + > + err = snd_card_register(card); > + if (err < 0) > + goto probe_error; > + > + usb_set_intfdata(interface, bcd2k); > + devices_used |= 1 << card_index; > + > + mutex_unlock(&devices_mutex); > + return 0; > + > +probe_error: > + dev_info(&bcd2k->dev->dev, PREFIX "error during probing"); > + bcd2000_free_usb_related_resources(bcd2k, interface); > + snd_card_free(card); > + mutex_unlock(&devices_mutex); > + return err; > +} > + > +static void bcd2000_disconnect(struct usb_interface *interface) > +{ > + struct bcd2000 *bcd2k = usb_get_intfdata(interface); > + > + if (!bcd2k) > + return; > + > + mutex_lock(&devices_mutex); > + > + /* make sure that userspace cannot create new requests */ > + snd_card_disconnect(bcd2k->card); > + > + bcd2000_free_usb_related_resources(bcd2k, interface); > + > + devices_used &= ~(1 << bcd2k->card_index); > + > + snd_card_free_when_closed(bcd2k->card); > + > + mutex_unlock(&devices_mutex); > +} > + > +static struct usb_driver bcd2000_driver = { > + .name = DEVICE_SHORTNAME, > + .probe = bcd2000_probe, > + .disconnect = bcd2000_disconnect, > + .id_table = id_table, > +}; > + > +static int __init bcd2000_init(void) > +{ > + int retval = 0; > + > + retval = usb_register(&bcd2000_driver); > + if (retval) > + pr_info(PREFIX "usb_register failed. Error: %d", retval); > + return retval; > +} > + > +static void __exit bcd2000_exit(void) > +{ > + usb_deregister(&bcd2000_driver); > +} > + > +module_init(bcd2000_init); > +module_exit(bcd2000_exit); > + > +MODULE_DEVICE_TABLE(usb, id_table); > +MODULE_AUTHOR("Mario Kicherer, dev@kicherer.org"); > +MODULE_DESCRIPTION("Behringer BCD2000 driver"); > +MODULE_LICENSE("GPL"); >
At Tue, 18 Feb 2014 18:28:16 +0100, Mario Kicherer wrote: > > This patch adds initial support for the Behringer BCD2000 USB DJ controller. > At the moment, only the MIDI part of the device is working, i.e. knobs, > buttons and LEDs. > > I also plan to add support for the audio part, but I assume that this will > require more effort than the rather simple MIDI interface. Progress can be > tracked at https://github.com/anyc/snd-usb-bcd2000. > > Changes since v3: > - applied style and snd_printk changes as suggested by Daniel Mack > > Changes since v2: > - applied more changes from Daniel Mack and Clemens Ladisch > > Changes since v1: > - fixed the various code style issues, thanks to Daniel Mack and > checkpatch.pl. > > Signed-off-by: Mario Kicherer <dev@kicherer.org> > --- > sound/usb/Kconfig | 13 ++ > sound/usb/Makefile | 2 +- > sound/usb/bcd2000/Makefile | 3 + > sound/usb/bcd2000/bcd2000.c | 488 ++++++++++++++++++++++++++++++++++++++++++++ > 4 files changed, 505 insertions(+), 1 deletion(-) > create mode 100644 sound/usb/bcd2000/Makefile > create mode 100644 sound/usb/bcd2000/bcd2000.c > > diff --git a/sound/usb/Kconfig b/sound/usb/Kconfig > index de9408b..145653a 100644 > --- a/sound/usb/Kconfig > +++ b/sound/usb/Kconfig > @@ -146,5 +146,18 @@ config SND_USB_HIFACE > To compile this driver as a module, choose M here: the module > will be called snd-usb-hiface. > > +config SND_BCD2000 > + tristate "Behringer BCD2000 MIDI driver" > + select SND_RAWMIDI > + help > + Say Y here to include MIDI support for the Behringer BCD2000 DJ > + controller. > + > + Audio support is still work-in-progress at > + https://github.com/anyc/snd-usb-bcd2000 > + > + To compile this driver as a module, choose M here: the module > + will be called snd-bcd2000. > + > endif # SND_USB > > diff --git a/sound/usb/Makefile b/sound/usb/Makefile > index abe668f..2b92f0d 100644 > --- a/sound/usb/Makefile > +++ b/sound/usb/Makefile > @@ -23,4 +23,4 @@ obj-$(CONFIG_SND_USB_UA101) += snd-usbmidi-lib.o > obj-$(CONFIG_SND_USB_USX2Y) += snd-usbmidi-lib.o > obj-$(CONFIG_SND_USB_US122L) += snd-usbmidi-lib.o > > -obj-$(CONFIG_SND) += misc/ usx2y/ caiaq/ 6fire/ hiface/ > +obj-$(CONFIG_SND) += misc/ usx2y/ caiaq/ 6fire/ hiface/ bcd2000/ > diff --git a/sound/usb/bcd2000/Makefile b/sound/usb/bcd2000/Makefile > new file mode 100644 > index 0000000..f09ccc0 > --- /dev/null > +++ b/sound/usb/bcd2000/Makefile > @@ -0,0 +1,3 @@ > +snd-bcd2000-y := bcd2000.o > + > +obj-$(CONFIG_SND_BCD2000) += snd-bcd2000.o > \ No newline at end of file > diff --git a/sound/usb/bcd2000/bcd2000.c b/sound/usb/bcd2000/bcd2000.c > new file mode 100644 > index 0000000..6965a89 > --- /dev/null > +++ b/sound/usb/bcd2000/bcd2000.c > @@ -0,0 +1,488 @@ > +/* > + * Behringer BCD2000 driver > + * > + * Copyright (C) 2014 Mario Kicherer (dev@kicherer.org) > + * > + * 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. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + */ > + > +#include <linux/kernel.h> > +#include <linux/errno.h> > +#include <linux/init.h> > +#include <linux/slab.h> > +#include <linux/module.h> > +#include <linux/usb.h> > +#include <linux/usb/audio.h> > +#include <sound/core.h> > +#include <sound/initval.h> > +#include <sound/rawmidi.h> > + > +#define DEVICE_NAME "Behringer BCD2000" > +#define DEVICE_SHORTNAME "bcd2000" > + > +#define PREFIX DEVICE_SHORTNAME ": " > +#define BUFSIZE 64 > + > +static struct usb_device_id id_table[] = { > + { USB_DEVICE(0x1397, 0x00bd) }, > + { }, > +}; > + > +static unsigned char device_cmd_prefix[] = {0x03, 0x00}; > + > +static unsigned char bcd2000_init_sequence[] = { > + 0x07, 0x00, 0x00, 0x00, 0x78, 0x48, 0x1c, 0x81, > + 0xc4, 0x00, 0x00, 0x00, 0x5e, 0x53, 0x4a, 0xf7, > + 0x18, 0xfa, 0x11, 0xff, 0x6c, 0xf3, 0x90, 0xff, > + 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, > + 0x18, 0xfa, 0x11, 0xff, 0x14, 0x00, 0x00, 0x00, > + 0x00, 0x00, 0x00, 0x00, 0xf2, 0x34, 0x4a, 0xf7, > + 0x18, 0xfa, 0x11, 0xff > +}; > + > +struct bcd2000 { > + struct usb_device *dev; > + struct snd_card *card; > + struct usb_interface *intf; > + int card_index; > + > + int midi_out_active; > + struct snd_rawmidi *rmidi; > + struct snd_rawmidi_substream *midi_receive_substream; > + struct snd_rawmidi_substream *midi_out_substream; > + > + unsigned char midi_in_buf[BUFSIZE]; > + unsigned char midi_out_buf[BUFSIZE]; > + > + struct urb *midi_out_urb; > + struct urb *midi_in_urb; > + > + struct usb_anchor anchor; > +}; > + > +static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; > +static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; > +static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; > + > +static DEFINE_MUTEX(devices_mutex); > +static unsigned int devices_used; > +static struct usb_driver bcd2000_driver; > + > +#ifdef CONFIG_SND_DEBUG > +static void bcd2000_dump_buffer(const char *prefix, const char *buf, int len) > +{ > + print_hex_dump(KERN_DEBUG, prefix, > + DUMP_PREFIX_NONE, 16, 1, > + buf, len, false); > +} > +#else > +static void bcd2000_dump_buffer(const char *prefix, const char *buf, int len) {} > +#endif > + > +static int bcd2000_midi_input_open(struct snd_rawmidi_substream *substream) > +{ > + return 0; > +} > + > +static int bcd2000_midi_input_close(struct snd_rawmidi_substream *substream) > +{ > + return 0; > +} > + > +/* register midi substream */ > +static void bcd2000_midi_input_trigger(struct snd_rawmidi_substream *substream, > + int up) > +{ > + struct bcd2000 *bcd2k = substream->rmidi->private_data; > + bcd2k->midi_receive_substream = up ? substream : NULL; > +} > + > +static void bcd2000_midi_handle_input(struct bcd2000 *bcd2k, > + const unsigned char *buf, unsigned int len) > +{ > + unsigned int length, tocopy; > + struct snd_rawmidi_substream *midi_receive_substream; > + > + midi_receive_substream = ACCESS_ONCE(bcd2k->midi_receive_substream); > + if (!midi_receive_substream) > + return; > + > + bcd2000_dump_buffer(PREFIX "received from device: ", buf, len); > + > + if (len < 2) > + return; > + > + /* > + * Packet structure: mm nn oo (pp) > + * mm: payload length > + * nn: MIDI command or note > + * oo: note or velocity > + * pp: velocity > + */ > + > + length = buf[0]; > + > + /* ignore packets without payload */ > + if (length == 0) > + return; > + > + tocopy = min(length, len-1); > + > + bcd2000_dump_buffer(PREFIX "sending to userspace: ", > + &buf[1], tocopy); > + > + snd_rawmidi_receive(midi_receive_substream, > + &buf[1], tocopy); > +} > + > +static void bcd2000_midi_send(struct bcd2000 *bcd2k, > + struct snd_rawmidi_substream *substream) > +{ > + int len, ret; > + > + BUILD_BUG_ON(sizeof(device_cmd_prefix) >= BUFSIZE); > + > + /* copy the "set LED" command bytes */ > + memcpy(bcd2k->midi_out_buf, device_cmd_prefix, > + sizeof(device_cmd_prefix)); > + > + /* > + * get MIDI packet and leave space for command prefix > + * and payload length > + */ > + len = snd_rawmidi_transmit(substream, > + bcd2k->midi_out_buf + 3, BUFSIZE - 3); > + > + if (len < 0) > + dev_err(&bcd2k->dev->dev, "%s: snd_rawmidi_transmit error %d\n", > + __func__, len); > + > + if (len <= 0) > + return; > + > + /* set payload length */ > + bcd2k->midi_out_buf[2] = len; > + bcd2k->midi_out_urb->transfer_buffer_length = BUFSIZE; > + > + bcd2000_dump_buffer(PREFIX "sending to device: ", > + bcd2k->midi_out_buf, len+3); > + > + /* send packet to the BCD2000 */ > + ret = usb_submit_urb(bcd2k->midi_out_urb, GFP_ATOMIC); > + if (ret < 0) > + dev_err(&bcd2k->dev->dev, PREFIX > + "%s (%p): usb_submit_urb() failed, ret=%d, len=%d\n", > + __func__, substream, ret, len); > + else > + bcd2k->midi_out_active = 1; > +} > + > +static int bcd2000_midi_output_open(struct snd_rawmidi_substream *substream) > +{ > + return 0; > +} > + > +static int bcd2000_midi_output_close(struct snd_rawmidi_substream *substream) > +{ > + struct bcd2000 *bcd2k = substream->rmidi->private_data; > + > + if (bcd2k->midi_out_active) { > + usb_kill_urb(bcd2k->midi_out_urb); > + bcd2k->midi_out_active = 0; > + } > + > + return 0; > +} > + > +/* register midi substream */ > +static void bcd2000_midi_output_trigger(struct snd_rawmidi_substream *substream, > + int up) > +{ > + struct bcd2000 *bcd2k = substream->rmidi->private_data; > + > + if (up) { > + bcd2k->midi_out_substream = substream; > + /* check if there is data userspace wants to send */ > + if (!bcd2k->midi_out_active) > + bcd2000_midi_send(bcd2k, substream); > + } else { > + bcd2k->midi_out_substream = NULL; > + } > +} > + > +static void bcd2000_output_complete(struct urb *urb) > +{ > + struct bcd2000 *bcd2k = urb->context; > + struct snd_rawmidi_substream *midi_out_substream; > + > + bcd2k->midi_out_active = 0; > + > + if (urb->status != 0) > + dev_err(&urb->dev->dev, > + PREFIX "output urb->status: %d\n", urb->status); > + > + midi_out_substream = ACCESS_ONCE(bcd2k->midi_out_substream); > + if (!midi_out_substream) > + return; > + > + /* check if there is more data userspace wants to send */ > + bcd2000_midi_send(bcd2k, midi_out_substream); > +} > + > +static void bcd2000_input_complete(struct urb *urb) > +{ > + int ret; > + struct device *dev = &urb->dev->dev; > + struct bcd2000 *bcd2k = urb->context; > + > + if (urb->status) { > + dev_warn(dev, PREFIX "input urb->status: %i\n", urb->status); > + return; > + } > + > + if (!bcd2k) > + return; > + > + if (urb->actual_length > 0) > + bcd2000_midi_handle_input(bcd2k, urb->transfer_buffer, > + urb->actual_length); > + > + /* acknowledge received packet */ > + ret = usb_submit_urb(bcd2k->midi_in_urb, GFP_ATOMIC); > + if (ret < 0) > + dev_err(dev, "unable to submit urb. OOM!?\n"); > +} > + > +static struct snd_rawmidi_ops bcd2000_midi_output = { > + .open = bcd2000_midi_output_open, > + .close = bcd2000_midi_output_close, > + .trigger = bcd2000_midi_output_trigger, > +}; > + > +static struct snd_rawmidi_ops bcd2000_midi_input = { > + .open = bcd2000_midi_input_open, > + .close = bcd2000_midi_input_close, > + .trigger = bcd2000_midi_input_trigger, > +}; > + > +static void bcd2000_init_device(struct bcd2000 *bcd2k) > +{ > + int ret; > + > + init_usb_anchor(&bcd2k->anchor); > + usb_anchor_urb(bcd2k->midi_out_urb, &bcd2k->anchor); > + usb_anchor_urb(bcd2k->midi_in_urb, &bcd2k->anchor); > + > + /* copy init sequence into buffer */ > + memcpy(bcd2k->midi_out_buf, bcd2000_init_sequence, 52); > + bcd2k->midi_out_urb->transfer_buffer_length = 52; > + > + /* submit sequence */ > + ret = usb_submit_urb(bcd2k->midi_out_urb, GFP_KERNEL); > + if (ret < 0) > + dev_err(&bcd2k->dev->dev, PREFIX > + "%s: usb_submit_urb() out failed, ret=%d: ", > + __func__, ret); > + else > + bcd2k->midi_out_active = 1; > + > + /* send empty packet to enable button and controller events */ > + ret = usb_submit_urb(bcd2k->midi_in_urb, GFP_KERNEL); > + if (ret < 0) > + dev_err(&bcd2k->dev->dev, PREFIX > + "%s: usb_submit_urb() in failed, ret=%d: ", > + __func__, ret); > + > + /* ensure initialization is finished */ > + usb_wait_anchor_empty_timeout(&bcd2k->anchor, 1000); > +} > + > +static int bcd2000_init_midi(struct bcd2000 *bcd2k) > +{ > + int ret; > + struct snd_rawmidi *rmidi; > + > + ret = snd_rawmidi_new(bcd2k->card, bcd2k->card->shortname, 0, > + 1, /* output */ > + 1, /* input */ > + &rmidi); > + > + if (ret < 0) > + return ret; > + > + strlcpy(rmidi->name, bcd2k->card->shortname, sizeof(rmidi->name)); > + > + rmidi->info_flags = SNDRV_RAWMIDI_INFO_DUPLEX; > + rmidi->private_data = bcd2k; > + > + rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; > + snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, > + &bcd2000_midi_output); > + > + rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; > + snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, > + &bcd2000_midi_input); > + > + bcd2k->rmidi = rmidi; > + > + bcd2k->midi_in_urb = usb_alloc_urb(0, GFP_KERNEL); > + bcd2k->midi_out_urb = usb_alloc_urb(0, GFP_KERNEL); > + > + if (!bcd2k->midi_in_urb || !bcd2k->midi_out_urb) { > + dev_err(&bcd2k->dev->dev, PREFIX "usb_alloc_urb failed\n"); > + return -ENOMEM; > + } > + > + usb_fill_int_urb(bcd2k->midi_in_urb, bcd2k->dev, > + usb_rcvintpipe(bcd2k->dev, 0x81), > + bcd2k->midi_in_buf, BUFSIZE, > + bcd2000_input_complete, bcd2k, 1); > + > + usb_fill_int_urb(bcd2k->midi_out_urb, bcd2k->dev, > + usb_sndintpipe(bcd2k->dev, 0x1), > + bcd2k->midi_out_buf, BUFSIZE, > + bcd2000_output_complete, bcd2k, 1); > + > + bcd2000_init_device(bcd2k); > + > + return 0; > +} > + > +static void bcd2000_free_usb_related_resources(struct bcd2000 *bcd2k, > + struct usb_interface *interface) > +{ > + /* usb_kill_urb not necessary, urb is aborted automatically */ > + > + usb_free_urb(bcd2k->midi_out_urb); > + usb_free_urb(bcd2k->midi_in_urb); > + > + if (bcd2k->intf) { > + usb_set_intfdata(bcd2k->intf, NULL); > + bcd2k->intf = NULL; > + } > +} > + > +static int bcd2000_probe(struct usb_interface *interface, > + const struct usb_device_id *usb_id) > +{ > + struct snd_card *card; > + struct bcd2000 *bcd2k; > + unsigned int card_index; > + char usb_path[32]; > + int err; > + > + mutex_lock(&devices_mutex); > + > + for (card_index = 0; card_index < SNDRV_CARDS; ++card_index) > + if (enable[card_index] && !(devices_used & (1 << card_index))) SNDRV_CARDS can be more than 32, depending on Kconfig. Use bitmap instead of unsinged int for devices_used bit flags. Takashi
diff --git a/sound/usb/Kconfig b/sound/usb/Kconfig index de9408b..145653a 100644 --- a/sound/usb/Kconfig +++ b/sound/usb/Kconfig @@ -146,5 +146,18 @@ config SND_USB_HIFACE To compile this driver as a module, choose M here: the module will be called snd-usb-hiface. +config SND_BCD2000 + tristate "Behringer BCD2000 MIDI driver" + select SND_RAWMIDI + help + Say Y here to include MIDI support for the Behringer BCD2000 DJ + controller. + + Audio support is still work-in-progress at + https://github.com/anyc/snd-usb-bcd2000 + + To compile this driver as a module, choose M here: the module + will be called snd-bcd2000. + endif # SND_USB diff --git a/sound/usb/Makefile b/sound/usb/Makefile index abe668f..2b92f0d 100644 --- a/sound/usb/Makefile +++ b/sound/usb/Makefile @@ -23,4 +23,4 @@ obj-$(CONFIG_SND_USB_UA101) += snd-usbmidi-lib.o obj-$(CONFIG_SND_USB_USX2Y) += snd-usbmidi-lib.o obj-$(CONFIG_SND_USB_US122L) += snd-usbmidi-lib.o -obj-$(CONFIG_SND) += misc/ usx2y/ caiaq/ 6fire/ hiface/ +obj-$(CONFIG_SND) += misc/ usx2y/ caiaq/ 6fire/ hiface/ bcd2000/ diff --git a/sound/usb/bcd2000/Makefile b/sound/usb/bcd2000/Makefile new file mode 100644 index 0000000..f09ccc0 --- /dev/null +++ b/sound/usb/bcd2000/Makefile @@ -0,0 +1,3 @@ +snd-bcd2000-y := bcd2000.o + +obj-$(CONFIG_SND_BCD2000) += snd-bcd2000.o \ No newline at end of file diff --git a/sound/usb/bcd2000/bcd2000.c b/sound/usb/bcd2000/bcd2000.c new file mode 100644 index 0000000..6965a89 --- /dev/null +++ b/sound/usb/bcd2000/bcd2000.c @@ -0,0 +1,488 @@ +/* + * Behringer BCD2000 driver + * + * Copyright (C) 2014 Mario Kicherer (dev@kicherer.org) + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/usb.h> +#include <linux/usb/audio.h> +#include <sound/core.h> +#include <sound/initval.h> +#include <sound/rawmidi.h> + +#define DEVICE_NAME "Behringer BCD2000" +#define DEVICE_SHORTNAME "bcd2000" + +#define PREFIX DEVICE_SHORTNAME ": " +#define BUFSIZE 64 + +static struct usb_device_id id_table[] = { + { USB_DEVICE(0x1397, 0x00bd) }, + { }, +}; + +static unsigned char device_cmd_prefix[] = {0x03, 0x00}; + +static unsigned char bcd2000_init_sequence[] = { + 0x07, 0x00, 0x00, 0x00, 0x78, 0x48, 0x1c, 0x81, + 0xc4, 0x00, 0x00, 0x00, 0x5e, 0x53, 0x4a, 0xf7, + 0x18, 0xfa, 0x11, 0xff, 0x6c, 0xf3, 0x90, 0xff, + 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, + 0x18, 0xfa, 0x11, 0xff, 0x14, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0xf2, 0x34, 0x4a, 0xf7, + 0x18, 0xfa, 0x11, 0xff +}; + +struct bcd2000 { + struct usb_device *dev; + struct snd_card *card; + struct usb_interface *intf; + int card_index; + + int midi_out_active; + struct snd_rawmidi *rmidi; + struct snd_rawmidi_substream *midi_receive_substream; + struct snd_rawmidi_substream *midi_out_substream; + + unsigned char midi_in_buf[BUFSIZE]; + unsigned char midi_out_buf[BUFSIZE]; + + struct urb *midi_out_urb; + struct urb *midi_in_urb; + + struct usb_anchor anchor; +}; + +static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; +static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; +static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; + +static DEFINE_MUTEX(devices_mutex); +static unsigned int devices_used; +static struct usb_driver bcd2000_driver; + +#ifdef CONFIG_SND_DEBUG +static void bcd2000_dump_buffer(const char *prefix, const char *buf, int len) +{ + print_hex_dump(KERN_DEBUG, prefix, + DUMP_PREFIX_NONE, 16, 1, + buf, len, false); +} +#else +static void bcd2000_dump_buffer(const char *prefix, const char *buf, int len) {} +#endif + +static int bcd2000_midi_input_open(struct snd_rawmidi_substream *substream) +{ + return 0; +} + +static int bcd2000_midi_input_close(struct snd_rawmidi_substream *substream) +{ + return 0; +} + +/* register midi substream */ +static void bcd2000_midi_input_trigger(struct snd_rawmidi_substream *substream, + int up) +{ + struct bcd2000 *bcd2k = substream->rmidi->private_data; + bcd2k->midi_receive_substream = up ? substream : NULL; +} + +static void bcd2000_midi_handle_input(struct bcd2000 *bcd2k, + const unsigned char *buf, unsigned int len) +{ + unsigned int length, tocopy; + struct snd_rawmidi_substream *midi_receive_substream; + + midi_receive_substream = ACCESS_ONCE(bcd2k->midi_receive_substream); + if (!midi_receive_substream) + return; + + bcd2000_dump_buffer(PREFIX "received from device: ", buf, len); + + if (len < 2) + return; + + /* + * Packet structure: mm nn oo (pp) + * mm: payload length + * nn: MIDI command or note + * oo: note or velocity + * pp: velocity + */ + + length = buf[0]; + + /* ignore packets without payload */ + if (length == 0) + return; + + tocopy = min(length, len-1); + + bcd2000_dump_buffer(PREFIX "sending to userspace: ", + &buf[1], tocopy); + + snd_rawmidi_receive(midi_receive_substream, + &buf[1], tocopy); +} + +static void bcd2000_midi_send(struct bcd2000 *bcd2k, + struct snd_rawmidi_substream *substream) +{ + int len, ret; + + BUILD_BUG_ON(sizeof(device_cmd_prefix) >= BUFSIZE); + + /* copy the "set LED" command bytes */ + memcpy(bcd2k->midi_out_buf, device_cmd_prefix, + sizeof(device_cmd_prefix)); + + /* + * get MIDI packet and leave space for command prefix + * and payload length + */ + len = snd_rawmidi_transmit(substream, + bcd2k->midi_out_buf + 3, BUFSIZE - 3); + + if (len < 0) + dev_err(&bcd2k->dev->dev, "%s: snd_rawmidi_transmit error %d\n", + __func__, len); + + if (len <= 0) + return; + + /* set payload length */ + bcd2k->midi_out_buf[2] = len; + bcd2k->midi_out_urb->transfer_buffer_length = BUFSIZE; + + bcd2000_dump_buffer(PREFIX "sending to device: ", + bcd2k->midi_out_buf, len+3); + + /* send packet to the BCD2000 */ + ret = usb_submit_urb(bcd2k->midi_out_urb, GFP_ATOMIC); + if (ret < 0) + dev_err(&bcd2k->dev->dev, PREFIX + "%s (%p): usb_submit_urb() failed, ret=%d, len=%d\n", + __func__, substream, ret, len); + else + bcd2k->midi_out_active = 1; +} + +static int bcd2000_midi_output_open(struct snd_rawmidi_substream *substream) +{ + return 0; +} + +static int bcd2000_midi_output_close(struct snd_rawmidi_substream *substream) +{ + struct bcd2000 *bcd2k = substream->rmidi->private_data; + + if (bcd2k->midi_out_active) { + usb_kill_urb(bcd2k->midi_out_urb); + bcd2k->midi_out_active = 0; + } + + return 0; +} + +/* register midi substream */ +static void bcd2000_midi_output_trigger(struct snd_rawmidi_substream *substream, + int up) +{ + struct bcd2000 *bcd2k = substream->rmidi->private_data; + + if (up) { + bcd2k->midi_out_substream = substream; + /* check if there is data userspace wants to send */ + if (!bcd2k->midi_out_active) + bcd2000_midi_send(bcd2k, substream); + } else { + bcd2k->midi_out_substream = NULL; + } +} + +static void bcd2000_output_complete(struct urb *urb) +{ + struct bcd2000 *bcd2k = urb->context; + struct snd_rawmidi_substream *midi_out_substream; + + bcd2k->midi_out_active = 0; + + if (urb->status != 0) + dev_err(&urb->dev->dev, + PREFIX "output urb->status: %d\n", urb->status); + + midi_out_substream = ACCESS_ONCE(bcd2k->midi_out_substream); + if (!midi_out_substream) + return; + + /* check if there is more data userspace wants to send */ + bcd2000_midi_send(bcd2k, midi_out_substream); +} + +static void bcd2000_input_complete(struct urb *urb) +{ + int ret; + struct device *dev = &urb->dev->dev; + struct bcd2000 *bcd2k = urb->context; + + if (urb->status) { + dev_warn(dev, PREFIX "input urb->status: %i\n", urb->status); + return; + } + + if (!bcd2k) + return; + + if (urb->actual_length > 0) + bcd2000_midi_handle_input(bcd2k, urb->transfer_buffer, + urb->actual_length); + + /* acknowledge received packet */ + ret = usb_submit_urb(bcd2k->midi_in_urb, GFP_ATOMIC); + if (ret < 0) + dev_err(dev, "unable to submit urb. OOM!?\n"); +} + +static struct snd_rawmidi_ops bcd2000_midi_output = { + .open = bcd2000_midi_output_open, + .close = bcd2000_midi_output_close, + .trigger = bcd2000_midi_output_trigger, +}; + +static struct snd_rawmidi_ops bcd2000_midi_input = { + .open = bcd2000_midi_input_open, + .close = bcd2000_midi_input_close, + .trigger = bcd2000_midi_input_trigger, +}; + +static void bcd2000_init_device(struct bcd2000 *bcd2k) +{ + int ret; + + init_usb_anchor(&bcd2k->anchor); + usb_anchor_urb(bcd2k->midi_out_urb, &bcd2k->anchor); + usb_anchor_urb(bcd2k->midi_in_urb, &bcd2k->anchor); + + /* copy init sequence into buffer */ + memcpy(bcd2k->midi_out_buf, bcd2000_init_sequence, 52); + bcd2k->midi_out_urb->transfer_buffer_length = 52; + + /* submit sequence */ + ret = usb_submit_urb(bcd2k->midi_out_urb, GFP_KERNEL); + if (ret < 0) + dev_err(&bcd2k->dev->dev, PREFIX + "%s: usb_submit_urb() out failed, ret=%d: ", + __func__, ret); + else + bcd2k->midi_out_active = 1; + + /* send empty packet to enable button and controller events */ + ret = usb_submit_urb(bcd2k->midi_in_urb, GFP_KERNEL); + if (ret < 0) + dev_err(&bcd2k->dev->dev, PREFIX + "%s: usb_submit_urb() in failed, ret=%d: ", + __func__, ret); + + /* ensure initialization is finished */ + usb_wait_anchor_empty_timeout(&bcd2k->anchor, 1000); +} + +static int bcd2000_init_midi(struct bcd2000 *bcd2k) +{ + int ret; + struct snd_rawmidi *rmidi; + + ret = snd_rawmidi_new(bcd2k->card, bcd2k->card->shortname, 0, + 1, /* output */ + 1, /* input */ + &rmidi); + + if (ret < 0) + return ret; + + strlcpy(rmidi->name, bcd2k->card->shortname, sizeof(rmidi->name)); + + rmidi->info_flags = SNDRV_RAWMIDI_INFO_DUPLEX; + rmidi->private_data = bcd2k; + + rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; + snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, + &bcd2000_midi_output); + + rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; + snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, + &bcd2000_midi_input); + + bcd2k->rmidi = rmidi; + + bcd2k->midi_in_urb = usb_alloc_urb(0, GFP_KERNEL); + bcd2k->midi_out_urb = usb_alloc_urb(0, GFP_KERNEL); + + if (!bcd2k->midi_in_urb || !bcd2k->midi_out_urb) { + dev_err(&bcd2k->dev->dev, PREFIX "usb_alloc_urb failed\n"); + return -ENOMEM; + } + + usb_fill_int_urb(bcd2k->midi_in_urb, bcd2k->dev, + usb_rcvintpipe(bcd2k->dev, 0x81), + bcd2k->midi_in_buf, BUFSIZE, + bcd2000_input_complete, bcd2k, 1); + + usb_fill_int_urb(bcd2k->midi_out_urb, bcd2k->dev, + usb_sndintpipe(bcd2k->dev, 0x1), + bcd2k->midi_out_buf, BUFSIZE, + bcd2000_output_complete, bcd2k, 1); + + bcd2000_init_device(bcd2k); + + return 0; +} + +static void bcd2000_free_usb_related_resources(struct bcd2000 *bcd2k, + struct usb_interface *interface) +{ + /* usb_kill_urb not necessary, urb is aborted automatically */ + + usb_free_urb(bcd2k->midi_out_urb); + usb_free_urb(bcd2k->midi_in_urb); + + if (bcd2k->intf) { + usb_set_intfdata(bcd2k->intf, NULL); + bcd2k->intf = NULL; + } +} + +static int bcd2000_probe(struct usb_interface *interface, + const struct usb_device_id *usb_id) +{ + struct snd_card *card; + struct bcd2000 *bcd2k; + unsigned int card_index; + char usb_path[32]; + int err; + + mutex_lock(&devices_mutex); + + for (card_index = 0; card_index < SNDRV_CARDS; ++card_index) + if (enable[card_index] && !(devices_used & (1 << card_index))) + break; + + if (card_index >= SNDRV_CARDS) { + mutex_unlock(&devices_mutex); + return -ENOENT; + } + + err = snd_card_create(index[card_index], id[card_index], THIS_MODULE, + sizeof(*bcd2k), &card); + if (err < 0) { + mutex_unlock(&devices_mutex); + return err; + } + + bcd2k = card->private_data; + bcd2k->dev = interface_to_usbdev(interface); + bcd2k->card = card; + bcd2k->card_index = card_index; + bcd2k->intf = interface; + + snd_card_set_dev(card, &interface->dev); + + strcpy(card->driver, DEVICE_NAME); + strcpy(card->shortname, DEVICE_SHORTNAME); + usb_make_path(bcd2k->dev, usb_path, sizeof(usb_path)); + snprintf(bcd2k->card->longname, sizeof(bcd2k->card->longname), + DEVICE_NAME ", at %s", + usb_path); + + dev_info(&bcd2k->dev->dev, PREFIX "%s", bcd2k->card->longname); + + err = bcd2000_init_midi(bcd2k); + if (err < 0) + goto probe_error; + + err = snd_card_register(card); + if (err < 0) + goto probe_error; + + usb_set_intfdata(interface, bcd2k); + devices_used |= 1 << card_index; + + mutex_unlock(&devices_mutex); + return 0; + +probe_error: + dev_info(&bcd2k->dev->dev, PREFIX "error during probing"); + bcd2000_free_usb_related_resources(bcd2k, interface); + snd_card_free(card); + mutex_unlock(&devices_mutex); + return err; +} + +static void bcd2000_disconnect(struct usb_interface *interface) +{ + struct bcd2000 *bcd2k = usb_get_intfdata(interface); + + if (!bcd2k) + return; + + mutex_lock(&devices_mutex); + + /* make sure that userspace cannot create new requests */ + snd_card_disconnect(bcd2k->card); + + bcd2000_free_usb_related_resources(bcd2k, interface); + + devices_used &= ~(1 << bcd2k->card_index); + + snd_card_free_when_closed(bcd2k->card); + + mutex_unlock(&devices_mutex); +} + +static struct usb_driver bcd2000_driver = { + .name = DEVICE_SHORTNAME, + .probe = bcd2000_probe, + .disconnect = bcd2000_disconnect, + .id_table = id_table, +}; + +static int __init bcd2000_init(void) +{ + int retval = 0; + + retval = usb_register(&bcd2000_driver); + if (retval) + pr_info(PREFIX "usb_register failed. Error: %d", retval); + return retval; +} + +static void __exit bcd2000_exit(void) +{ + usb_deregister(&bcd2000_driver); +} + +module_init(bcd2000_init); +module_exit(bcd2000_exit); + +MODULE_DEVICE_TABLE(usb, id_table); +MODULE_AUTHOR("Mario Kicherer, dev@kicherer.org"); +MODULE_DESCRIPTION("Behringer BCD2000 driver"); +MODULE_LICENSE("GPL");
This patch adds initial support for the Behringer BCD2000 USB DJ controller. At the moment, only the MIDI part of the device is working, i.e. knobs, buttons and LEDs. I also plan to add support for the audio part, but I assume that this will require more effort than the rather simple MIDI interface. Progress can be tracked at https://github.com/anyc/snd-usb-bcd2000. Changes since v3: - applied style and snd_printk changes as suggested by Daniel Mack Changes since v2: - applied more changes from Daniel Mack and Clemens Ladisch Changes since v1: - fixed the various code style issues, thanks to Daniel Mack and checkpatch.pl. Signed-off-by: Mario Kicherer <dev@kicherer.org> --- sound/usb/Kconfig | 13 ++ sound/usb/Makefile | 2 +- sound/usb/bcd2000/Makefile | 3 + sound/usb/bcd2000/bcd2000.c | 488 ++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 505 insertions(+), 1 deletion(-) create mode 100644 sound/usb/bcd2000/Makefile create mode 100644 sound/usb/bcd2000/bcd2000.c