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1632 lines
45 KiB
1632 lines
45 KiB
/*
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* usbmidi.c - ALSA USB MIDI driver
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*
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* Copyright (c) 2002-2005 Clemens Ladisch
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* All rights reserved.
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*
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* Based on the OSS usb-midi driver by NAGANO Daisuke,
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* NetBSD's umidi driver by Takuya SHIOZAKI,
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* the "USB Device Class Definition for MIDI Devices" by Roland
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed and/or modified under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any later
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* version.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sound/driver.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/bitops.h>
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#include <linux/interrupt.h>
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#include <linux/spinlock.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/timer.h>
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#include <linux/usb.h>
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#include <sound/core.h>
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#include <sound/minors.h>
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#include <sound/rawmidi.h>
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#include "usbaudio.h"
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/*
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* define this to log all USB packets
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*/
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/* #define DUMP_PACKETS */
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/*
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* how long to wait after some USB errors, so that khubd can disconnect() us
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* without too many spurious errors
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*/
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#define ERROR_DELAY_JIFFIES (HZ / 10)
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MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
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MODULE_DESCRIPTION("USB Audio/MIDI helper module");
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MODULE_LICENSE("Dual BSD/GPL");
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struct usb_ms_header_descriptor {
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__u8 bLength;
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__u8 bDescriptorType;
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__u8 bDescriptorSubtype;
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__u8 bcdMSC[2];
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__le16 wTotalLength;
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} __attribute__ ((packed));
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struct usb_ms_endpoint_descriptor {
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__u8 bLength;
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__u8 bDescriptorType;
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__u8 bDescriptorSubtype;
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__u8 bNumEmbMIDIJack;
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__u8 baAssocJackID[0];
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} __attribute__ ((packed));
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typedef struct snd_usb_midi snd_usb_midi_t;
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typedef struct snd_usb_midi_endpoint snd_usb_midi_endpoint_t;
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typedef struct snd_usb_midi_out_endpoint snd_usb_midi_out_endpoint_t;
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typedef struct snd_usb_midi_in_endpoint snd_usb_midi_in_endpoint_t;
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typedef struct usbmidi_out_port usbmidi_out_port_t;
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typedef struct usbmidi_in_port usbmidi_in_port_t;
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struct usb_protocol_ops {
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void (*input)(snd_usb_midi_in_endpoint_t*, uint8_t*, int);
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void (*output)(snd_usb_midi_out_endpoint_t*);
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void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t);
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void (*init_out_endpoint)(snd_usb_midi_out_endpoint_t*);
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void (*finish_out_endpoint)(snd_usb_midi_out_endpoint_t*);
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};
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struct snd_usb_midi {
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snd_usb_audio_t *chip;
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struct usb_interface *iface;
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const snd_usb_audio_quirk_t *quirk;
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snd_rawmidi_t* rmidi;
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struct usb_protocol_ops* usb_protocol_ops;
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struct list_head list;
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struct timer_list error_timer;
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struct snd_usb_midi_endpoint {
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snd_usb_midi_out_endpoint_t *out;
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snd_usb_midi_in_endpoint_t *in;
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} endpoints[MIDI_MAX_ENDPOINTS];
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unsigned long input_triggered;
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};
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struct snd_usb_midi_out_endpoint {
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snd_usb_midi_t* umidi;
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struct urb* urb;
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int urb_active;
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int max_transfer; /* size of urb buffer */
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struct tasklet_struct tasklet;
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spinlock_t buffer_lock;
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struct usbmidi_out_port {
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snd_usb_midi_out_endpoint_t* ep;
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snd_rawmidi_substream_t* substream;
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int active;
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uint8_t cable; /* cable number << 4 */
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uint8_t state;
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#define STATE_UNKNOWN 0
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#define STATE_1PARAM 1
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#define STATE_2PARAM_1 2
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#define STATE_2PARAM_2 3
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#define STATE_SYSEX_0 4
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#define STATE_SYSEX_1 5
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#define STATE_SYSEX_2 6
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uint8_t data[2];
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} ports[0x10];
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int current_port;
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};
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struct snd_usb_midi_in_endpoint {
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snd_usb_midi_t* umidi;
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struct urb* urb;
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struct usbmidi_in_port {
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snd_rawmidi_substream_t* substream;
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} ports[0x10];
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u8 seen_f5;
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u8 error_resubmit;
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int current_port;
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};
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static void snd_usbmidi_do_output(snd_usb_midi_out_endpoint_t* ep);
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static const uint8_t snd_usbmidi_cin_length[] = {
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0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1
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};
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/*
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* Submits the URB, with error handling.
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*/
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static int snd_usbmidi_submit_urb(struct urb* urb, gfp_t flags)
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{
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int err = usb_submit_urb(urb, flags);
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if (err < 0 && err != -ENODEV)
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snd_printk(KERN_ERR "usb_submit_urb: %d\n", err);
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return err;
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}
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/*
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* Error handling for URB completion functions.
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*/
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static int snd_usbmidi_urb_error(int status)
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{
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switch (status) {
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/* manually unlinked, or device gone */
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case -ENOENT:
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case -ECONNRESET:
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case -ESHUTDOWN:
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case -ENODEV:
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return -ENODEV;
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/* errors that might occur during unplugging */
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case -EPROTO: /* EHCI */
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case -ETIMEDOUT: /* OHCI */
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case -EILSEQ: /* UHCI */
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return -EIO;
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default:
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snd_printk(KERN_ERR "urb status %d\n", status);
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return 0; /* continue */
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}
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}
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/*
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* Receives a chunk of MIDI data.
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*/
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static void snd_usbmidi_input_data(snd_usb_midi_in_endpoint_t* ep, int portidx,
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uint8_t* data, int length)
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{
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usbmidi_in_port_t* port = &ep->ports[portidx];
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if (!port->substream) {
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snd_printd("unexpected port %d!\n", portidx);
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return;
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}
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if (!test_bit(port->substream->number, &ep->umidi->input_triggered))
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return;
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snd_rawmidi_receive(port->substream, data, length);
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}
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#ifdef DUMP_PACKETS
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static void dump_urb(const char *type, const u8 *data, int length)
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{
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snd_printk(KERN_DEBUG "%s packet: [", type);
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for (; length > 0; ++data, --length)
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printk(" %02x", *data);
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printk(" ]\n");
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}
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#else
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#define dump_urb(type, data, length) /* nothing */
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#endif
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/*
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* Processes the data read from the device.
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*/
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static void snd_usbmidi_in_urb_complete(struct urb* urb, struct pt_regs *regs)
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{
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snd_usb_midi_in_endpoint_t* ep = urb->context;
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if (urb->status == 0) {
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dump_urb("received", urb->transfer_buffer, urb->actual_length);
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ep->umidi->usb_protocol_ops->input(ep, urb->transfer_buffer,
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urb->actual_length);
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} else {
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int err = snd_usbmidi_urb_error(urb->status);
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if (err < 0) {
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if (err != -ENODEV) {
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ep->error_resubmit = 1;
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mod_timer(&ep->umidi->error_timer,
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jiffies + ERROR_DELAY_JIFFIES);
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}
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return;
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}
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}
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if (usb_pipe_needs_resubmit(urb->pipe)) {
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urb->dev = ep->umidi->chip->dev;
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snd_usbmidi_submit_urb(urb, GFP_ATOMIC);
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}
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}
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static void snd_usbmidi_out_urb_complete(struct urb* urb, struct pt_regs *regs)
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{
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snd_usb_midi_out_endpoint_t* ep = urb->context;
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spin_lock(&ep->buffer_lock);
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ep->urb_active = 0;
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spin_unlock(&ep->buffer_lock);
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if (urb->status < 0) {
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int err = snd_usbmidi_urb_error(urb->status);
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if (err < 0) {
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if (err != -ENODEV)
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mod_timer(&ep->umidi->error_timer,
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jiffies + ERROR_DELAY_JIFFIES);
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return;
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}
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}
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snd_usbmidi_do_output(ep);
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}
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/*
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* This is called when some data should be transferred to the device
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* (from one or more substreams).
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*/
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static void snd_usbmidi_do_output(snd_usb_midi_out_endpoint_t* ep)
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{
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struct urb* urb = ep->urb;
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unsigned long flags;
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spin_lock_irqsave(&ep->buffer_lock, flags);
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if (ep->urb_active || ep->umidi->chip->shutdown) {
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spin_unlock_irqrestore(&ep->buffer_lock, flags);
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return;
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}
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urb->transfer_buffer_length = 0;
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ep->umidi->usb_protocol_ops->output(ep);
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if (urb->transfer_buffer_length > 0) {
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dump_urb("sending", urb->transfer_buffer,
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urb->transfer_buffer_length);
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urb->dev = ep->umidi->chip->dev;
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ep->urb_active = snd_usbmidi_submit_urb(urb, GFP_ATOMIC) >= 0;
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}
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spin_unlock_irqrestore(&ep->buffer_lock, flags);
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}
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static void snd_usbmidi_out_tasklet(unsigned long data)
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{
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snd_usb_midi_out_endpoint_t* ep = (snd_usb_midi_out_endpoint_t *) data;
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snd_usbmidi_do_output(ep);
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}
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/* called after transfers had been interrupted due to some USB error */
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static void snd_usbmidi_error_timer(unsigned long data)
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{
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snd_usb_midi_t *umidi = (snd_usb_midi_t *)data;
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int i;
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for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
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snd_usb_midi_in_endpoint_t *in = umidi->endpoints[i].in;
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if (in && in->error_resubmit) {
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in->error_resubmit = 0;
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in->urb->dev = umidi->chip->dev;
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snd_usbmidi_submit_urb(in->urb, GFP_ATOMIC);
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}
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if (umidi->endpoints[i].out)
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snd_usbmidi_do_output(umidi->endpoints[i].out);
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}
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}
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/* helper function to send static data that may not DMA-able */
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static int send_bulk_static_data(snd_usb_midi_out_endpoint_t* ep,
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const void *data, int len)
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{
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int err;
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void *buf = kmalloc(len, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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memcpy(buf, data, len);
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dump_urb("sending", buf, len);
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err = usb_bulk_msg(ep->umidi->chip->dev, ep->urb->pipe, buf, len,
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NULL, 250);
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kfree(buf);
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return err;
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}
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/*
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* Standard USB MIDI protocol: see the spec.
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* Midiman protocol: like the standard protocol, but the control byte is the
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* fourth byte in each packet, and uses length instead of CIN.
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*/
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static void snd_usbmidi_standard_input(snd_usb_midi_in_endpoint_t* ep,
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uint8_t* buffer, int buffer_length)
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{
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int i;
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for (i = 0; i + 3 < buffer_length; i += 4)
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if (buffer[i] != 0) {
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int cable = buffer[i] >> 4;
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int length = snd_usbmidi_cin_length[buffer[i] & 0x0f];
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snd_usbmidi_input_data(ep, cable, &buffer[i + 1], length);
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}
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}
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static void snd_usbmidi_midiman_input(snd_usb_midi_in_endpoint_t* ep,
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uint8_t* buffer, int buffer_length)
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{
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int i;
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for (i = 0; i + 3 < buffer_length; i += 4)
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if (buffer[i + 3] != 0) {
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int port = buffer[i + 3] >> 4;
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int length = buffer[i + 3] & 3;
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snd_usbmidi_input_data(ep, port, &buffer[i], length);
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}
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}
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/*
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* Adds one USB MIDI packet to the output buffer.
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*/
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static void snd_usbmidi_output_standard_packet(struct urb* urb, uint8_t p0,
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uint8_t p1, uint8_t p2, uint8_t p3)
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{
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uint8_t* buf = (uint8_t*)urb->transfer_buffer + urb->transfer_buffer_length;
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buf[0] = p0;
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buf[1] = p1;
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buf[2] = p2;
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buf[3] = p3;
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urb->transfer_buffer_length += 4;
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}
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|
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/*
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* Adds one Midiman packet to the output buffer.
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*/
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static void snd_usbmidi_output_midiman_packet(struct urb* urb, uint8_t p0,
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uint8_t p1, uint8_t p2, uint8_t p3)
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{
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|
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uint8_t* buf = (uint8_t*)urb->transfer_buffer + urb->transfer_buffer_length;
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buf[0] = p1;
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buf[1] = p2;
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buf[2] = p3;
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buf[3] = (p0 & 0xf0) | snd_usbmidi_cin_length[p0 & 0x0f];
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urb->transfer_buffer_length += 4;
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}
|
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|
|
/*
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* Converts MIDI commands to USB MIDI packets.
|
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*/
|
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static void snd_usbmidi_transmit_byte(usbmidi_out_port_t* port,
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uint8_t b, struct urb* urb)
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{
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uint8_t p0 = port->cable;
|
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void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t) =
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port->ep->umidi->usb_protocol_ops->output_packet;
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|
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if (b >= 0xf8) {
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output_packet(urb, p0 | 0x0f, b, 0, 0);
|
|
} else if (b >= 0xf0) {
|
|
switch (b) {
|
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case 0xf0:
|
|
port->data[0] = b;
|
|
port->state = STATE_SYSEX_1;
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break;
|
|
case 0xf1:
|
|
case 0xf3:
|
|
port->data[0] = b;
|
|
port->state = STATE_1PARAM;
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break;
|
|
case 0xf2:
|
|
port->data[0] = b;
|
|
port->state = STATE_2PARAM_1;
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break;
|
|
case 0xf4:
|
|
case 0xf5:
|
|
port->state = STATE_UNKNOWN;
|
|
break;
|
|
case 0xf6:
|
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output_packet(urb, p0 | 0x05, 0xf6, 0, 0);
|
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port->state = STATE_UNKNOWN;
|
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break;
|
|
case 0xf7:
|
|
switch (port->state) {
|
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case STATE_SYSEX_0:
|
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output_packet(urb, p0 | 0x05, 0xf7, 0, 0);
|
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break;
|
|
case STATE_SYSEX_1:
|
|
output_packet(urb, p0 | 0x06, port->data[0], 0xf7, 0);
|
|
break;
|
|
case STATE_SYSEX_2:
|
|
output_packet(urb, p0 | 0x07, port->data[0], port->data[1], 0xf7);
|
|
break;
|
|
}
|
|
port->state = STATE_UNKNOWN;
|
|
break;
|
|
}
|
|
} else if (b >= 0x80) {
|
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port->data[0] = b;
|
|
if (b >= 0xc0 && b <= 0xdf)
|
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port->state = STATE_1PARAM;
|
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else
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port->state = STATE_2PARAM_1;
|
|
} else { /* b < 0x80 */
|
|
switch (port->state) {
|
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case STATE_1PARAM:
|
|
if (port->data[0] < 0xf0) {
|
|
p0 |= port->data[0] >> 4;
|
|
} else {
|
|
p0 |= 0x02;
|
|
port->state = STATE_UNKNOWN;
|
|
}
|
|
output_packet(urb, p0, port->data[0], b, 0);
|
|
break;
|
|
case STATE_2PARAM_1:
|
|
port->data[1] = b;
|
|
port->state = STATE_2PARAM_2;
|
|
break;
|
|
case STATE_2PARAM_2:
|
|
if (port->data[0] < 0xf0) {
|
|
p0 |= port->data[0] >> 4;
|
|
port->state = STATE_2PARAM_1;
|
|
} else {
|
|
p0 |= 0x03;
|
|
port->state = STATE_UNKNOWN;
|
|
}
|
|
output_packet(urb, p0, port->data[0], port->data[1], b);
|
|
break;
|
|
case STATE_SYSEX_0:
|
|
port->data[0] = b;
|
|
port->state = STATE_SYSEX_1;
|
|
break;
|
|
case STATE_SYSEX_1:
|
|
port->data[1] = b;
|
|
port->state = STATE_SYSEX_2;
|
|
break;
|
|
case STATE_SYSEX_2:
|
|
output_packet(urb, p0 | 0x04, port->data[0], port->data[1], b);
|
|
port->state = STATE_SYSEX_0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void snd_usbmidi_standard_output(snd_usb_midi_out_endpoint_t* ep)
|
|
{
|
|
struct urb* urb = ep->urb;
|
|
int p;
|
|
|
|
/* FIXME: lower-numbered ports can starve higher-numbered ports */
|
|
for (p = 0; p < 0x10; ++p) {
|
|
usbmidi_out_port_t* port = &ep->ports[p];
|
|
if (!port->active)
|
|
continue;
|
|
while (urb->transfer_buffer_length + 3 < ep->max_transfer) {
|
|
uint8_t b;
|
|
if (snd_rawmidi_transmit(port->substream, &b, 1) != 1) {
|
|
port->active = 0;
|
|
break;
|
|
}
|
|
snd_usbmidi_transmit_byte(port, b, urb);
|
|
}
|
|
}
|
|
}
|
|
|
|
static struct usb_protocol_ops snd_usbmidi_standard_ops = {
|
|
.input = snd_usbmidi_standard_input,
|
|
.output = snd_usbmidi_standard_output,
|
|
.output_packet = snd_usbmidi_output_standard_packet,
|
|
};
|
|
|
|
static struct usb_protocol_ops snd_usbmidi_midiman_ops = {
|
|
.input = snd_usbmidi_midiman_input,
|
|
.output = snd_usbmidi_standard_output,
|
|
.output_packet = snd_usbmidi_output_midiman_packet,
|
|
};
|
|
|
|
/*
|
|
* Novation USB MIDI protocol: number of data bytes is in the first byte
|
|
* (when receiving) (+1!) or in the second byte (when sending); data begins
|
|
* at the third byte.
|
|
*/
|
|
|
|
static void snd_usbmidi_novation_input(snd_usb_midi_in_endpoint_t* ep,
|
|
uint8_t* buffer, int buffer_length)
|
|
{
|
|
if (buffer_length < 2 || !buffer[0] || buffer_length < buffer[0] + 1)
|
|
return;
|
|
snd_usbmidi_input_data(ep, 0, &buffer[2], buffer[0] - 1);
|
|
}
|
|
|
|
static void snd_usbmidi_novation_output(snd_usb_midi_out_endpoint_t* ep)
|
|
{
|
|
uint8_t* transfer_buffer;
|
|
int count;
|
|
|
|
if (!ep->ports[0].active)
|
|
return;
|
|
transfer_buffer = ep->urb->transfer_buffer;
|
|
count = snd_rawmidi_transmit(ep->ports[0].substream,
|
|
&transfer_buffer[2],
|
|
ep->max_transfer - 2);
|
|
if (count < 1) {
|
|
ep->ports[0].active = 0;
|
|
return;
|
|
}
|
|
transfer_buffer[0] = 0;
|
|
transfer_buffer[1] = count;
|
|
ep->urb->transfer_buffer_length = 2 + count;
|
|
}
|
|
|
|
static struct usb_protocol_ops snd_usbmidi_novation_ops = {
|
|
.input = snd_usbmidi_novation_input,
|
|
.output = snd_usbmidi_novation_output,
|
|
};
|
|
|
|
/*
|
|
* "raw" protocol: used by the MOTU FastLane.
|
|
*/
|
|
|
|
static void snd_usbmidi_raw_input(snd_usb_midi_in_endpoint_t* ep,
|
|
uint8_t* buffer, int buffer_length)
|
|
{
|
|
snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
|
|
}
|
|
|
|
static void snd_usbmidi_raw_output(snd_usb_midi_out_endpoint_t* ep)
|
|
{
|
|
int count;
|
|
|
|
if (!ep->ports[0].active)
|
|
return;
|
|
count = snd_rawmidi_transmit(ep->ports[0].substream,
|
|
ep->urb->transfer_buffer,
|
|
ep->max_transfer);
|
|
if (count < 1) {
|
|
ep->ports[0].active = 0;
|
|
return;
|
|
}
|
|
ep->urb->transfer_buffer_length = count;
|
|
}
|
|
|
|
static struct usb_protocol_ops snd_usbmidi_raw_ops = {
|
|
.input = snd_usbmidi_raw_input,
|
|
.output = snd_usbmidi_raw_output,
|
|
};
|
|
|
|
/*
|
|
* Emagic USB MIDI protocol: raw MIDI with "F5 xx" port switching.
|
|
*/
|
|
|
|
static void snd_usbmidi_emagic_init_out(snd_usb_midi_out_endpoint_t* ep)
|
|
{
|
|
static const u8 init_data[] = {
|
|
/* initialization magic: "get version" */
|
|
0xf0,
|
|
0x00, 0x20, 0x31, /* Emagic */
|
|
0x64, /* Unitor8 */
|
|
0x0b, /* version number request */
|
|
0x00, /* command version */
|
|
0x00, /* EEPROM, box 0 */
|
|
0xf7
|
|
};
|
|
send_bulk_static_data(ep, init_data, sizeof(init_data));
|
|
/* while we're at it, pour on more magic */
|
|
send_bulk_static_data(ep, init_data, sizeof(init_data));
|
|
}
|
|
|
|
static void snd_usbmidi_emagic_finish_out(snd_usb_midi_out_endpoint_t* ep)
|
|
{
|
|
static const u8 finish_data[] = {
|
|
/* switch to patch mode with last preset */
|
|
0xf0,
|
|
0x00, 0x20, 0x31, /* Emagic */
|
|
0x64, /* Unitor8 */
|
|
0x10, /* patch switch command */
|
|
0x00, /* command version */
|
|
0x7f, /* to all boxes */
|
|
0x40, /* last preset in EEPROM */
|
|
0xf7
|
|
};
|
|
send_bulk_static_data(ep, finish_data, sizeof(finish_data));
|
|
}
|
|
|
|
static void snd_usbmidi_emagic_input(snd_usb_midi_in_endpoint_t* ep,
|
|
uint8_t* buffer, int buffer_length)
|
|
{
|
|
int i;
|
|
|
|
/* FF indicates end of valid data */
|
|
for (i = 0; i < buffer_length; ++i)
|
|
if (buffer[i] == 0xff) {
|
|
buffer_length = i;
|
|
break;
|
|
}
|
|
|
|
/* handle F5 at end of last buffer */
|
|
if (ep->seen_f5)
|
|
goto switch_port;
|
|
|
|
while (buffer_length > 0) {
|
|
/* determine size of data until next F5 */
|
|
for (i = 0; i < buffer_length; ++i)
|
|
if (buffer[i] == 0xf5)
|
|
break;
|
|
snd_usbmidi_input_data(ep, ep->current_port, buffer, i);
|
|
buffer += i;
|
|
buffer_length -= i;
|
|
|
|
if (buffer_length <= 0)
|
|
break;
|
|
/* assert(buffer[0] == 0xf5); */
|
|
ep->seen_f5 = 1;
|
|
++buffer;
|
|
--buffer_length;
|
|
|
|
switch_port:
|
|
if (buffer_length <= 0)
|
|
break;
|
|
if (buffer[0] < 0x80) {
|
|
ep->current_port = (buffer[0] - 1) & 15;
|
|
++buffer;
|
|
--buffer_length;
|
|
}
|
|
ep->seen_f5 = 0;
|
|
}
|
|
}
|
|
|
|
static void snd_usbmidi_emagic_output(snd_usb_midi_out_endpoint_t* ep)
|
|
{
|
|
int port0 = ep->current_port;
|
|
uint8_t* buf = ep->urb->transfer_buffer;
|
|
int buf_free = ep->max_transfer;
|
|
int length, i;
|
|
|
|
for (i = 0; i < 0x10; ++i) {
|
|
/* round-robin, starting at the last current port */
|
|
int portnum = (port0 + i) & 15;
|
|
usbmidi_out_port_t* port = &ep->ports[portnum];
|
|
|
|
if (!port->active)
|
|
continue;
|
|
if (snd_rawmidi_transmit_peek(port->substream, buf, 1) != 1) {
|
|
port->active = 0;
|
|
continue;
|
|
}
|
|
|
|
if (portnum != ep->current_port) {
|
|
if (buf_free < 2)
|
|
break;
|
|
ep->current_port = portnum;
|
|
buf[0] = 0xf5;
|
|
buf[1] = (portnum + 1) & 15;
|
|
buf += 2;
|
|
buf_free -= 2;
|
|
}
|
|
|
|
if (buf_free < 1)
|
|
break;
|
|
length = snd_rawmidi_transmit(port->substream, buf, buf_free);
|
|
if (length > 0) {
|
|
buf += length;
|
|
buf_free -= length;
|
|
if (buf_free < 1)
|
|
break;
|
|
}
|
|
}
|
|
if (buf_free < ep->max_transfer && buf_free > 0) {
|
|
*buf = 0xff;
|
|
--buf_free;
|
|
}
|
|
ep->urb->transfer_buffer_length = ep->max_transfer - buf_free;
|
|
}
|
|
|
|
static struct usb_protocol_ops snd_usbmidi_emagic_ops = {
|
|
.input = snd_usbmidi_emagic_input,
|
|
.output = snd_usbmidi_emagic_output,
|
|
.init_out_endpoint = snd_usbmidi_emagic_init_out,
|
|
.finish_out_endpoint = snd_usbmidi_emagic_finish_out,
|
|
};
|
|
|
|
|
|
static int snd_usbmidi_output_open(snd_rawmidi_substream_t* substream)
|
|
{
|
|
snd_usb_midi_t* umidi = substream->rmidi->private_data;
|
|
usbmidi_out_port_t* port = NULL;
|
|
int i, j;
|
|
|
|
for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
|
|
if (umidi->endpoints[i].out)
|
|
for (j = 0; j < 0x10; ++j)
|
|
if (umidi->endpoints[i].out->ports[j].substream == substream) {
|
|
port = &umidi->endpoints[i].out->ports[j];
|
|
break;
|
|
}
|
|
if (!port) {
|
|
snd_BUG();
|
|
return -ENXIO;
|
|
}
|
|
substream->runtime->private_data = port;
|
|
port->state = STATE_UNKNOWN;
|
|
return 0;
|
|
}
|
|
|
|
static int snd_usbmidi_output_close(snd_rawmidi_substream_t* substream)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void snd_usbmidi_output_trigger(snd_rawmidi_substream_t* substream, int up)
|
|
{
|
|
usbmidi_out_port_t* port = (usbmidi_out_port_t*)substream->runtime->private_data;
|
|
|
|
port->active = up;
|
|
if (up) {
|
|
if (port->ep->umidi->chip->shutdown) {
|
|
/* gobble up remaining bytes to prevent wait in
|
|
* snd_rawmidi_drain_output */
|
|
while (!snd_rawmidi_transmit_empty(substream))
|
|
snd_rawmidi_transmit_ack(substream, 1);
|
|
return;
|
|
}
|
|
tasklet_hi_schedule(&port->ep->tasklet);
|
|
}
|
|
}
|
|
|
|
static int snd_usbmidi_input_open(snd_rawmidi_substream_t* substream)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int snd_usbmidi_input_close(snd_rawmidi_substream_t* substream)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void snd_usbmidi_input_trigger(snd_rawmidi_substream_t* substream, int up)
|
|
{
|
|
snd_usb_midi_t* umidi = substream->rmidi->private_data;
|
|
|
|
if (up)
|
|
set_bit(substream->number, &umidi->input_triggered);
|
|
else
|
|
clear_bit(substream->number, &umidi->input_triggered);
|
|
}
|
|
|
|
static snd_rawmidi_ops_t snd_usbmidi_output_ops = {
|
|
.open = snd_usbmidi_output_open,
|
|
.close = snd_usbmidi_output_close,
|
|
.trigger = snd_usbmidi_output_trigger,
|
|
};
|
|
|
|
static snd_rawmidi_ops_t snd_usbmidi_input_ops = {
|
|
.open = snd_usbmidi_input_open,
|
|
.close = snd_usbmidi_input_close,
|
|
.trigger = snd_usbmidi_input_trigger
|
|
};
|
|
|
|
/*
|
|
* Frees an input endpoint.
|
|
* May be called when ep hasn't been initialized completely.
|
|
*/
|
|
static void snd_usbmidi_in_endpoint_delete(snd_usb_midi_in_endpoint_t* ep)
|
|
{
|
|
if (ep->urb) {
|
|
usb_buffer_free(ep->umidi->chip->dev,
|
|
ep->urb->transfer_buffer_length,
|
|
ep->urb->transfer_buffer,
|
|
ep->urb->transfer_dma);
|
|
usb_free_urb(ep->urb);
|
|
}
|
|
kfree(ep);
|
|
}
|
|
|
|
/*
|
|
* Creates an input endpoint.
|
|
*/
|
|
static int snd_usbmidi_in_endpoint_create(snd_usb_midi_t* umidi,
|
|
snd_usb_midi_endpoint_info_t* ep_info,
|
|
snd_usb_midi_endpoint_t* rep)
|
|
{
|
|
snd_usb_midi_in_endpoint_t* ep;
|
|
void* buffer;
|
|
unsigned int pipe;
|
|
int length;
|
|
|
|
rep->in = NULL;
|
|
ep = kzalloc(sizeof(*ep), GFP_KERNEL);
|
|
if (!ep)
|
|
return -ENOMEM;
|
|
ep->umidi = umidi;
|
|
|
|
ep->urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!ep->urb) {
|
|
snd_usbmidi_in_endpoint_delete(ep);
|
|
return -ENOMEM;
|
|
}
|
|
if (ep_info->in_interval)
|
|
pipe = usb_rcvintpipe(umidi->chip->dev, ep_info->in_ep);
|
|
else
|
|
pipe = usb_rcvbulkpipe(umidi->chip->dev, ep_info->in_ep);
|
|
length = usb_maxpacket(umidi->chip->dev, pipe, 0);
|
|
buffer = usb_buffer_alloc(umidi->chip->dev, length, GFP_KERNEL,
|
|
&ep->urb->transfer_dma);
|
|
if (!buffer) {
|
|
snd_usbmidi_in_endpoint_delete(ep);
|
|
return -ENOMEM;
|
|
}
|
|
if (ep_info->in_interval)
|
|
usb_fill_int_urb(ep->urb, umidi->chip->dev, pipe, buffer, length,
|
|
snd_usb_complete_callback(snd_usbmidi_in_urb_complete),
|
|
ep, ep_info->in_interval);
|
|
else
|
|
usb_fill_bulk_urb(ep->urb, umidi->chip->dev, pipe, buffer, length,
|
|
snd_usb_complete_callback(snd_usbmidi_in_urb_complete),
|
|
ep);
|
|
ep->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
|
|
|
|
rep->in = ep;
|
|
return 0;
|
|
}
|
|
|
|
static unsigned int snd_usbmidi_count_bits(unsigned int x)
|
|
{
|
|
unsigned int bits = 0;
|
|
|
|
for (; x; x >>= 1)
|
|
bits += x & 1;
|
|
return bits;
|
|
}
|
|
|
|
/*
|
|
* Frees an output endpoint.
|
|
* May be called when ep hasn't been initialized completely.
|
|
*/
|
|
static void snd_usbmidi_out_endpoint_delete(snd_usb_midi_out_endpoint_t* ep)
|
|
{
|
|
if (ep->urb) {
|
|
usb_buffer_free(ep->umidi->chip->dev, ep->max_transfer,
|
|
ep->urb->transfer_buffer,
|
|
ep->urb->transfer_dma);
|
|
usb_free_urb(ep->urb);
|
|
}
|
|
kfree(ep);
|
|
}
|
|
|
|
/*
|
|
* Creates an output endpoint, and initializes output ports.
|
|
*/
|
|
static int snd_usbmidi_out_endpoint_create(snd_usb_midi_t* umidi,
|
|
snd_usb_midi_endpoint_info_t* ep_info,
|
|
snd_usb_midi_endpoint_t* rep)
|
|
{
|
|
snd_usb_midi_out_endpoint_t* ep;
|
|
int i;
|
|
unsigned int pipe;
|
|
void* buffer;
|
|
|
|
rep->out = NULL;
|
|
ep = kzalloc(sizeof(*ep), GFP_KERNEL);
|
|
if (!ep)
|
|
return -ENOMEM;
|
|
ep->umidi = umidi;
|
|
|
|
ep->urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!ep->urb) {
|
|
snd_usbmidi_out_endpoint_delete(ep);
|
|
return -ENOMEM;
|
|
}
|
|
/* we never use interrupt output pipes */
|
|
pipe = usb_sndbulkpipe(umidi->chip->dev, ep_info->out_ep);
|
|
ep->max_transfer = usb_maxpacket(umidi->chip->dev, pipe, 1);
|
|
buffer = usb_buffer_alloc(umidi->chip->dev, ep->max_transfer,
|
|
GFP_KERNEL, &ep->urb->transfer_dma);
|
|
if (!buffer) {
|
|
snd_usbmidi_out_endpoint_delete(ep);
|
|
return -ENOMEM;
|
|
}
|
|
usb_fill_bulk_urb(ep->urb, umidi->chip->dev, pipe, buffer,
|
|
ep->max_transfer,
|
|
snd_usb_complete_callback(snd_usbmidi_out_urb_complete), ep);
|
|
ep->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
|
|
|
|
spin_lock_init(&ep->buffer_lock);
|
|
tasklet_init(&ep->tasklet, snd_usbmidi_out_tasklet, (unsigned long)ep);
|
|
|
|
for (i = 0; i < 0x10; ++i)
|
|
if (ep_info->out_cables & (1 << i)) {
|
|
ep->ports[i].ep = ep;
|
|
ep->ports[i].cable = i << 4;
|
|
}
|
|
|
|
if (umidi->usb_protocol_ops->init_out_endpoint)
|
|
umidi->usb_protocol_ops->init_out_endpoint(ep);
|
|
|
|
rep->out = ep;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Frees everything.
|
|
*/
|
|
static void snd_usbmidi_free(snd_usb_midi_t* umidi)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
|
|
snd_usb_midi_endpoint_t* ep = &umidi->endpoints[i];
|
|
if (ep->out)
|
|
snd_usbmidi_out_endpoint_delete(ep->out);
|
|
if (ep->in)
|
|
snd_usbmidi_in_endpoint_delete(ep->in);
|
|
}
|
|
kfree(umidi);
|
|
}
|
|
|
|
/*
|
|
* Unlinks all URBs (must be done before the usb_device is deleted).
|
|
*/
|
|
void snd_usbmidi_disconnect(struct list_head* p)
|
|
{
|
|
snd_usb_midi_t* umidi;
|
|
int i;
|
|
|
|
umidi = list_entry(p, snd_usb_midi_t, list);
|
|
del_timer_sync(&umidi->error_timer);
|
|
for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
|
|
snd_usb_midi_endpoint_t* ep = &umidi->endpoints[i];
|
|
if (ep->out)
|
|
tasklet_kill(&ep->out->tasklet);
|
|
if (ep->out && ep->out->urb) {
|
|
usb_kill_urb(ep->out->urb);
|
|
if (umidi->usb_protocol_ops->finish_out_endpoint)
|
|
umidi->usb_protocol_ops->finish_out_endpoint(ep->out);
|
|
}
|
|
if (ep->in && ep->in->urb)
|
|
usb_kill_urb(ep->in->urb);
|
|
}
|
|
}
|
|
|
|
static void snd_usbmidi_rawmidi_free(snd_rawmidi_t* rmidi)
|
|
{
|
|
snd_usb_midi_t* umidi = rmidi->private_data;
|
|
snd_usbmidi_free(umidi);
|
|
}
|
|
|
|
static snd_rawmidi_substream_t* snd_usbmidi_find_substream(snd_usb_midi_t* umidi,
|
|
int stream, int number)
|
|
{
|
|
struct list_head* list;
|
|
|
|
list_for_each(list, &umidi->rmidi->streams[stream].substreams) {
|
|
snd_rawmidi_substream_t* substream = list_entry(list, snd_rawmidi_substream_t, list);
|
|
if (substream->number == number)
|
|
return substream;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* This list specifies names for ports that do not fit into the standard
|
|
* "(product) MIDI (n)" schema because they aren't external MIDI ports,
|
|
* such as internal control or synthesizer ports.
|
|
*/
|
|
static struct {
|
|
u32 id;
|
|
int port;
|
|
const char *name_format;
|
|
} snd_usbmidi_port_names[] = {
|
|
/* Roland UA-100 */
|
|
{ USB_ID(0x0582, 0x0000), 2, "%s Control" },
|
|
/* Roland SC-8850 */
|
|
{ USB_ID(0x0582, 0x0003), 0, "%s Part A" },
|
|
{ USB_ID(0x0582, 0x0003), 1, "%s Part B" },
|
|
{ USB_ID(0x0582, 0x0003), 2, "%s Part C" },
|
|
{ USB_ID(0x0582, 0x0003), 3, "%s Part D" },
|
|
{ USB_ID(0x0582, 0x0003), 4, "%s MIDI 1" },
|
|
{ USB_ID(0x0582, 0x0003), 5, "%s MIDI 2" },
|
|
/* Roland U-8 */
|
|
{ USB_ID(0x0582, 0x0004), 0, "%s MIDI" },
|
|
{ USB_ID(0x0582, 0x0004), 1, "%s Control" },
|
|
/* Roland SC-8820 */
|
|
{ USB_ID(0x0582, 0x0007), 0, "%s Part A" },
|
|
{ USB_ID(0x0582, 0x0007), 1, "%s Part B" },
|
|
{ USB_ID(0x0582, 0x0007), 2, "%s MIDI" },
|
|
/* Roland SK-500 */
|
|
{ USB_ID(0x0582, 0x000b), 0, "%s Part A" },
|
|
{ USB_ID(0x0582, 0x000b), 1, "%s Part B" },
|
|
{ USB_ID(0x0582, 0x000b), 2, "%s MIDI" },
|
|
/* Roland SC-D70 */
|
|
{ USB_ID(0x0582, 0x000c), 0, "%s Part A" },
|
|
{ USB_ID(0x0582, 0x000c), 1, "%s Part B" },
|
|
{ USB_ID(0x0582, 0x000c), 2, "%s MIDI" },
|
|
/* Edirol UM-880 */
|
|
{ USB_ID(0x0582, 0x0014), 8, "%s Control" },
|
|
/* Edirol SD-90 */
|
|
{ USB_ID(0x0582, 0x0016), 0, "%s Part A" },
|
|
{ USB_ID(0x0582, 0x0016), 1, "%s Part B" },
|
|
{ USB_ID(0x0582, 0x0016), 2, "%s MIDI 1" },
|
|
{ USB_ID(0x0582, 0x0016), 3, "%s MIDI 2" },
|
|
/* Edirol UM-550 */
|
|
{ USB_ID(0x0582, 0x0023), 5, "%s Control" },
|
|
/* Edirol SD-20 */
|
|
{ USB_ID(0x0582, 0x0027), 0, "%s Part A" },
|
|
{ USB_ID(0x0582, 0x0027), 1, "%s Part B" },
|
|
{ USB_ID(0x0582, 0x0027), 2, "%s MIDI" },
|
|
/* Edirol SD-80 */
|
|
{ USB_ID(0x0582, 0x0029), 0, "%s Part A" },
|
|
{ USB_ID(0x0582, 0x0029), 1, "%s Part B" },
|
|
{ USB_ID(0x0582, 0x0029), 2, "%s MIDI 1" },
|
|
{ USB_ID(0x0582, 0x0029), 3, "%s MIDI 2" },
|
|
/* Edirol UA-700 */
|
|
{ USB_ID(0x0582, 0x002b), 0, "%s MIDI" },
|
|
{ USB_ID(0x0582, 0x002b), 1, "%s Control" },
|
|
/* Roland VariOS */
|
|
{ USB_ID(0x0582, 0x002f), 0, "%s MIDI" },
|
|
{ USB_ID(0x0582, 0x002f), 1, "%s External MIDI" },
|
|
{ USB_ID(0x0582, 0x002f), 2, "%s Sync" },
|
|
/* Edirol PCR */
|
|
{ USB_ID(0x0582, 0x0033), 0, "%s MIDI" },
|
|
{ USB_ID(0x0582, 0x0033), 1, "%s 1" },
|
|
{ USB_ID(0x0582, 0x0033), 2, "%s 2" },
|
|
/* BOSS GS-10 */
|
|
{ USB_ID(0x0582, 0x003b), 0, "%s MIDI" },
|
|
{ USB_ID(0x0582, 0x003b), 1, "%s Control" },
|
|
/* Edirol UA-1000 */
|
|
{ USB_ID(0x0582, 0x0044), 0, "%s MIDI" },
|
|
{ USB_ID(0x0582, 0x0044), 1, "%s Control" },
|
|
/* Edirol UR-80 */
|
|
{ USB_ID(0x0582, 0x0048), 0, "%s MIDI" },
|
|
{ USB_ID(0x0582, 0x0048), 1, "%s 1" },
|
|
{ USB_ID(0x0582, 0x0048), 2, "%s 2" },
|
|
/* Edirol PCR-A */
|
|
{ USB_ID(0x0582, 0x004d), 0, "%s MIDI" },
|
|
{ USB_ID(0x0582, 0x004d), 1, "%s 1" },
|
|
{ USB_ID(0x0582, 0x004d), 2, "%s 2" },
|
|
/* M-Audio MidiSport 8x8 */
|
|
{ USB_ID(0x0763, 0x1031), 8, "%s Control" },
|
|
{ USB_ID(0x0763, 0x1033), 8, "%s Control" },
|
|
/* MOTU Fastlane */
|
|
{ USB_ID(0x07fd, 0x0001), 0, "%s MIDI A" },
|
|
{ USB_ID(0x07fd, 0x0001), 1, "%s MIDI B" },
|
|
/* Emagic Unitor8/AMT8/MT4 */
|
|
{ USB_ID(0x086a, 0x0001), 8, "%s Broadcast" },
|
|
{ USB_ID(0x086a, 0x0002), 8, "%s Broadcast" },
|
|
{ USB_ID(0x086a, 0x0003), 4, "%s Broadcast" },
|
|
};
|
|
|
|
static void snd_usbmidi_init_substream(snd_usb_midi_t* umidi,
|
|
int stream, int number,
|
|
snd_rawmidi_substream_t** rsubstream)
|
|
{
|
|
int i;
|
|
const char *name_format;
|
|
|
|
snd_rawmidi_substream_t* substream = snd_usbmidi_find_substream(umidi, stream, number);
|
|
if (!substream) {
|
|
snd_printd(KERN_ERR "substream %d:%d not found\n", stream, number);
|
|
return;
|
|
}
|
|
|
|
/* TODO: read port name from jack descriptor */
|
|
name_format = "%s MIDI %d";
|
|
for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_names); ++i) {
|
|
if (snd_usbmidi_port_names[i].id == umidi->chip->usb_id &&
|
|
snd_usbmidi_port_names[i].port == number) {
|
|
name_format = snd_usbmidi_port_names[i].name_format;
|
|
break;
|
|
}
|
|
}
|
|
snprintf(substream->name, sizeof(substream->name),
|
|
name_format, umidi->chip->card->shortname, number + 1);
|
|
|
|
*rsubstream = substream;
|
|
}
|
|
|
|
/*
|
|
* Creates the endpoints and their ports.
|
|
*/
|
|
static int snd_usbmidi_create_endpoints(snd_usb_midi_t* umidi,
|
|
snd_usb_midi_endpoint_info_t* endpoints)
|
|
{
|
|
int i, j, err;
|
|
int out_ports = 0, in_ports = 0;
|
|
|
|
for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
|
|
if (endpoints[i].out_cables) {
|
|
err = snd_usbmidi_out_endpoint_create(umidi, &endpoints[i],
|
|
&umidi->endpoints[i]);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
if (endpoints[i].in_cables) {
|
|
err = snd_usbmidi_in_endpoint_create(umidi, &endpoints[i],
|
|
&umidi->endpoints[i]);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
for (j = 0; j < 0x10; ++j) {
|
|
if (endpoints[i].out_cables & (1 << j)) {
|
|
snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_OUTPUT, out_ports,
|
|
&umidi->endpoints[i].out->ports[j].substream);
|
|
++out_ports;
|
|
}
|
|
if (endpoints[i].in_cables & (1 << j)) {
|
|
snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_INPUT, in_ports,
|
|
&umidi->endpoints[i].in->ports[j].substream);
|
|
++in_ports;
|
|
}
|
|
}
|
|
}
|
|
snd_printdd(KERN_INFO "created %d output and %d input ports\n",
|
|
out_ports, in_ports);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Returns MIDIStreaming device capabilities.
|
|
*/
|
|
static int snd_usbmidi_get_ms_info(snd_usb_midi_t* umidi,
|
|
snd_usb_midi_endpoint_info_t* endpoints)
|
|
{
|
|
struct usb_interface* intf;
|
|
struct usb_host_interface *hostif;
|
|
struct usb_interface_descriptor* intfd;
|
|
struct usb_ms_header_descriptor* ms_header;
|
|
struct usb_host_endpoint *hostep;
|
|
struct usb_endpoint_descriptor* ep;
|
|
struct usb_ms_endpoint_descriptor* ms_ep;
|
|
int i, epidx;
|
|
|
|
intf = umidi->iface;
|
|
if (!intf)
|
|
return -ENXIO;
|
|
hostif = &intf->altsetting[0];
|
|
intfd = get_iface_desc(hostif);
|
|
ms_header = (struct usb_ms_header_descriptor*)hostif->extra;
|
|
if (hostif->extralen >= 7 &&
|
|
ms_header->bLength >= 7 &&
|
|
ms_header->bDescriptorType == USB_DT_CS_INTERFACE &&
|
|
ms_header->bDescriptorSubtype == HEADER)
|
|
snd_printdd(KERN_INFO "MIDIStreaming version %02x.%02x\n",
|
|
ms_header->bcdMSC[1], ms_header->bcdMSC[0]);
|
|
else
|
|
snd_printk(KERN_WARNING "MIDIStreaming interface descriptor not found\n");
|
|
|
|
epidx = 0;
|
|
for (i = 0; i < intfd->bNumEndpoints; ++i) {
|
|
hostep = &hostif->endpoint[i];
|
|
ep = get_ep_desc(hostep);
|
|
if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK &&
|
|
(ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT)
|
|
continue;
|
|
ms_ep = (struct usb_ms_endpoint_descriptor*)hostep->extra;
|
|
if (hostep->extralen < 4 ||
|
|
ms_ep->bLength < 4 ||
|
|
ms_ep->bDescriptorType != USB_DT_CS_ENDPOINT ||
|
|
ms_ep->bDescriptorSubtype != MS_GENERAL)
|
|
continue;
|
|
if ((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
|
|
if (endpoints[epidx].out_ep) {
|
|
if (++epidx >= MIDI_MAX_ENDPOINTS) {
|
|
snd_printk(KERN_WARNING "too many endpoints\n");
|
|
break;
|
|
}
|
|
}
|
|
endpoints[epidx].out_ep = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
|
|
if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)
|
|
endpoints[epidx].out_interval = ep->bInterval;
|
|
endpoints[epidx].out_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1;
|
|
snd_printdd(KERN_INFO "EP %02X: %d jack(s)\n",
|
|
ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
|
|
} else {
|
|
if (endpoints[epidx].in_ep) {
|
|
if (++epidx >= MIDI_MAX_ENDPOINTS) {
|
|
snd_printk(KERN_WARNING "too many endpoints\n");
|
|
break;
|
|
}
|
|
}
|
|
endpoints[epidx].in_ep = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
|
|
if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)
|
|
endpoints[epidx].in_interval = ep->bInterval;
|
|
endpoints[epidx].in_cables = (1 << ms_ep->bNumEmbMIDIJack) - 1;
|
|
snd_printdd(KERN_INFO "EP %02X: %d jack(s)\n",
|
|
ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* On Roland devices, use the second alternate setting to be able to use
|
|
* the interrupt input endpoint.
|
|
*/
|
|
static void snd_usbmidi_switch_roland_altsetting(snd_usb_midi_t* umidi)
|
|
{
|
|
struct usb_interface* intf;
|
|
struct usb_host_interface *hostif;
|
|
struct usb_interface_descriptor* intfd;
|
|
|
|
intf = umidi->iface;
|
|
if (!intf || intf->num_altsetting != 2)
|
|
return;
|
|
|
|
hostif = &intf->altsetting[1];
|
|
intfd = get_iface_desc(hostif);
|
|
if (intfd->bNumEndpoints != 2 ||
|
|
(get_endpoint(hostif, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK ||
|
|
(get_endpoint(hostif, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT)
|
|
return;
|
|
|
|
snd_printdd(KERN_INFO "switching to altsetting %d with int ep\n",
|
|
intfd->bAlternateSetting);
|
|
usb_set_interface(umidi->chip->dev, intfd->bInterfaceNumber,
|
|
intfd->bAlternateSetting);
|
|
}
|
|
|
|
/*
|
|
* Try to find any usable endpoints in the interface.
|
|
*/
|
|
static int snd_usbmidi_detect_endpoints(snd_usb_midi_t* umidi,
|
|
snd_usb_midi_endpoint_info_t* endpoint,
|
|
int max_endpoints)
|
|
{
|
|
struct usb_interface* intf;
|
|
struct usb_host_interface *hostif;
|
|
struct usb_interface_descriptor* intfd;
|
|
struct usb_endpoint_descriptor* epd;
|
|
int i, out_eps = 0, in_eps = 0;
|
|
|
|
if (USB_ID_VENDOR(umidi->chip->usb_id) == 0x0582)
|
|
snd_usbmidi_switch_roland_altsetting(umidi);
|
|
|
|
if (endpoint[0].out_ep || endpoint[0].in_ep)
|
|
return 0;
|
|
|
|
intf = umidi->iface;
|
|
if (!intf || intf->num_altsetting < 1)
|
|
return -ENOENT;
|
|
hostif = intf->cur_altsetting;
|
|
intfd = get_iface_desc(hostif);
|
|
|
|
for (i = 0; i < intfd->bNumEndpoints; ++i) {
|
|
epd = get_endpoint(hostif, i);
|
|
if ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK &&
|
|
(epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT)
|
|
continue;
|
|
if (out_eps < max_endpoints &&
|
|
(epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
|
|
endpoint[out_eps].out_ep = epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
|
|
if ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)
|
|
endpoint[out_eps].out_interval = epd->bInterval;
|
|
++out_eps;
|
|
}
|
|
if (in_eps < max_endpoints &&
|
|
(epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) {
|
|
endpoint[in_eps].in_ep = epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
|
|
if ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)
|
|
endpoint[in_eps].in_interval = epd->bInterval;
|
|
++in_eps;
|
|
}
|
|
}
|
|
return (out_eps || in_eps) ? 0 : -ENOENT;
|
|
}
|
|
|
|
/*
|
|
* Detects the endpoints for one-port-per-endpoint protocols.
|
|
*/
|
|
static int snd_usbmidi_detect_per_port_endpoints(snd_usb_midi_t* umidi,
|
|
snd_usb_midi_endpoint_info_t* endpoints)
|
|
{
|
|
int err, i;
|
|
|
|
err = snd_usbmidi_detect_endpoints(umidi, endpoints, MIDI_MAX_ENDPOINTS);
|
|
for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
|
|
if (endpoints[i].out_ep)
|
|
endpoints[i].out_cables = 0x0001;
|
|
if (endpoints[i].in_ep)
|
|
endpoints[i].in_cables = 0x0001;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Detects the endpoints and ports of Yamaha devices.
|
|
*/
|
|
static int snd_usbmidi_detect_yamaha(snd_usb_midi_t* umidi,
|
|
snd_usb_midi_endpoint_info_t* endpoint)
|
|
{
|
|
struct usb_interface* intf;
|
|
struct usb_host_interface *hostif;
|
|
struct usb_interface_descriptor* intfd;
|
|
uint8_t* cs_desc;
|
|
|
|
intf = umidi->iface;
|
|
if (!intf)
|
|
return -ENOENT;
|
|
hostif = intf->altsetting;
|
|
intfd = get_iface_desc(hostif);
|
|
if (intfd->bNumEndpoints < 1)
|
|
return -ENOENT;
|
|
|
|
/*
|
|
* For each port there is one MIDI_IN/OUT_JACK descriptor, not
|
|
* necessarily with any useful contents. So simply count 'em.
|
|
*/
|
|
for (cs_desc = hostif->extra;
|
|
cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
|
|
cs_desc += cs_desc[0]) {
|
|
if (cs_desc[1] == CS_AUDIO_INTERFACE) {
|
|
if (cs_desc[2] == MIDI_IN_JACK)
|
|
endpoint->in_cables = (endpoint->in_cables << 1) | 1;
|
|
else if (cs_desc[2] == MIDI_OUT_JACK)
|
|
endpoint->out_cables = (endpoint->out_cables << 1) | 1;
|
|
}
|
|
}
|
|
if (!endpoint->in_cables && !endpoint->out_cables)
|
|
return -ENOENT;
|
|
|
|
return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
|
|
}
|
|
|
|
/*
|
|
* Creates the endpoints and their ports for Midiman devices.
|
|
*/
|
|
static int snd_usbmidi_create_endpoints_midiman(snd_usb_midi_t* umidi,
|
|
snd_usb_midi_endpoint_info_t* endpoint)
|
|
{
|
|
snd_usb_midi_endpoint_info_t ep_info;
|
|
struct usb_interface* intf;
|
|
struct usb_host_interface *hostif;
|
|
struct usb_interface_descriptor* intfd;
|
|
struct usb_endpoint_descriptor* epd;
|
|
int cable, err;
|
|
|
|
intf = umidi->iface;
|
|
if (!intf)
|
|
return -ENOENT;
|
|
hostif = intf->altsetting;
|
|
intfd = get_iface_desc(hostif);
|
|
/*
|
|
* The various MidiSport devices have more or less random endpoint
|
|
* numbers, so we have to identify the endpoints by their index in
|
|
* the descriptor array, like the driver for that other OS does.
|
|
*
|
|
* There is one interrupt input endpoint for all input ports, one
|
|
* bulk output endpoint for even-numbered ports, and one for odd-
|
|
* numbered ports. Both bulk output endpoints have corresponding
|
|
* input bulk endpoints (at indices 1 and 3) which aren't used.
|
|
*/
|
|
if (intfd->bNumEndpoints < (endpoint->out_cables > 0x0001 ? 5 : 3)) {
|
|
snd_printdd(KERN_ERR "not enough endpoints\n");
|
|
return -ENOENT;
|
|
}
|
|
|
|
epd = get_endpoint(hostif, 0);
|
|
if ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) != USB_DIR_IN ||
|
|
(epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT) {
|
|
snd_printdd(KERN_ERR "endpoint[0] isn't interrupt\n");
|
|
return -ENXIO;
|
|
}
|
|
epd = get_endpoint(hostif, 2);
|
|
if ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) != USB_DIR_OUT ||
|
|
(epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK) {
|
|
snd_printdd(KERN_ERR "endpoint[2] isn't bulk output\n");
|
|
return -ENXIO;
|
|
}
|
|
if (endpoint->out_cables > 0x0001) {
|
|
epd = get_endpoint(hostif, 4);
|
|
if ((epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK) != USB_DIR_OUT ||
|
|
(epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK) {
|
|
snd_printdd(KERN_ERR "endpoint[4] isn't bulk output\n");
|
|
return -ENXIO;
|
|
}
|
|
}
|
|
|
|
ep_info.out_ep = get_endpoint(hostif, 2)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
|
|
ep_info.out_cables = endpoint->out_cables & 0x5555;
|
|
err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, &umidi->endpoints[0]);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
ep_info.in_ep = get_endpoint(hostif, 0)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
|
|
ep_info.in_interval = get_endpoint(hostif, 0)->bInterval;
|
|
ep_info.in_cables = endpoint->in_cables;
|
|
err = snd_usbmidi_in_endpoint_create(umidi, &ep_info, &umidi->endpoints[0]);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (endpoint->out_cables > 0x0001) {
|
|
ep_info.out_ep = get_endpoint(hostif, 4)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
|
|
ep_info.out_cables = endpoint->out_cables & 0xaaaa;
|
|
err = snd_usbmidi_out_endpoint_create(umidi, &ep_info, &umidi->endpoints[1]);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
for (cable = 0; cable < 0x10; ++cable) {
|
|
if (endpoint->out_cables & (1 << cable))
|
|
snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_OUTPUT, cable,
|
|
&umidi->endpoints[cable & 1].out->ports[cable].substream);
|
|
if (endpoint->in_cables & (1 << cable))
|
|
snd_usbmidi_init_substream(umidi, SNDRV_RAWMIDI_STREAM_INPUT, cable,
|
|
&umidi->endpoints[0].in->ports[cable].substream);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int snd_usbmidi_create_rawmidi(snd_usb_midi_t* umidi,
|
|
int out_ports, int in_ports)
|
|
{
|
|
snd_rawmidi_t* rmidi;
|
|
int err;
|
|
|
|
err = snd_rawmidi_new(umidi->chip->card, "USB MIDI",
|
|
umidi->chip->next_midi_device++,
|
|
out_ports, in_ports, &rmidi);
|
|
if (err < 0)
|
|
return err;
|
|
strcpy(rmidi->name, umidi->chip->card->shortname);
|
|
rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
|
|
SNDRV_RAWMIDI_INFO_INPUT |
|
|
SNDRV_RAWMIDI_INFO_DUPLEX;
|
|
rmidi->private_data = umidi;
|
|
rmidi->private_free = snd_usbmidi_rawmidi_free;
|
|
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_usbmidi_output_ops);
|
|
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_usbmidi_input_ops);
|
|
|
|
umidi->rmidi = rmidi;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Temporarily stop input.
|
|
*/
|
|
void snd_usbmidi_input_stop(struct list_head* p)
|
|
{
|
|
snd_usb_midi_t* umidi;
|
|
int i;
|
|
|
|
umidi = list_entry(p, snd_usb_midi_t, list);
|
|
for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
|
|
snd_usb_midi_endpoint_t* ep = &umidi->endpoints[i];
|
|
if (ep->in)
|
|
usb_kill_urb(ep->in->urb);
|
|
}
|
|
}
|
|
|
|
static void snd_usbmidi_input_start_ep(snd_usb_midi_in_endpoint_t* ep)
|
|
{
|
|
if (ep) {
|
|
struct urb* urb = ep->urb;
|
|
urb->dev = ep->umidi->chip->dev;
|
|
snd_usbmidi_submit_urb(urb, GFP_KERNEL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Resume input after a call to snd_usbmidi_input_stop().
|
|
*/
|
|
void snd_usbmidi_input_start(struct list_head* p)
|
|
{
|
|
snd_usb_midi_t* umidi;
|
|
int i;
|
|
|
|
umidi = list_entry(p, snd_usb_midi_t, list);
|
|
for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
|
|
snd_usbmidi_input_start_ep(umidi->endpoints[i].in);
|
|
}
|
|
|
|
/*
|
|
* Creates and registers everything needed for a MIDI streaming interface.
|
|
*/
|
|
int snd_usb_create_midi_interface(snd_usb_audio_t* chip,
|
|
struct usb_interface* iface,
|
|
const snd_usb_audio_quirk_t* quirk)
|
|
{
|
|
snd_usb_midi_t* umidi;
|
|
snd_usb_midi_endpoint_info_t endpoints[MIDI_MAX_ENDPOINTS];
|
|
int out_ports, in_ports;
|
|
int i, err;
|
|
|
|
umidi = kzalloc(sizeof(*umidi), GFP_KERNEL);
|
|
if (!umidi)
|
|
return -ENOMEM;
|
|
umidi->chip = chip;
|
|
umidi->iface = iface;
|
|
umidi->quirk = quirk;
|
|
umidi->usb_protocol_ops = &snd_usbmidi_standard_ops;
|
|
init_timer(&umidi->error_timer);
|
|
umidi->error_timer.function = snd_usbmidi_error_timer;
|
|
umidi->error_timer.data = (unsigned long)umidi;
|
|
|
|
/* detect the endpoint(s) to use */
|
|
memset(endpoints, 0, sizeof(endpoints));
|
|
if (!quirk) {
|
|
err = snd_usbmidi_get_ms_info(umidi, endpoints);
|
|
} else {
|
|
switch (quirk->type) {
|
|
case QUIRK_MIDI_FIXED_ENDPOINT:
|
|
memcpy(&endpoints[0], quirk->data,
|
|
sizeof(snd_usb_midi_endpoint_info_t));
|
|
err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
|
|
break;
|
|
case QUIRK_MIDI_YAMAHA:
|
|
err = snd_usbmidi_detect_yamaha(umidi, &endpoints[0]);
|
|
break;
|
|
case QUIRK_MIDI_MIDIMAN:
|
|
umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops;
|
|
memcpy(&endpoints[0], quirk->data,
|
|
sizeof(snd_usb_midi_endpoint_info_t));
|
|
err = 0;
|
|
break;
|
|
case QUIRK_MIDI_NOVATION:
|
|
umidi->usb_protocol_ops = &snd_usbmidi_novation_ops;
|
|
err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
|
|
break;
|
|
case QUIRK_MIDI_RAW:
|
|
umidi->usb_protocol_ops = &snd_usbmidi_raw_ops;
|
|
err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
|
|
break;
|
|
case QUIRK_MIDI_EMAGIC:
|
|
umidi->usb_protocol_ops = &snd_usbmidi_emagic_ops;
|
|
memcpy(&endpoints[0], quirk->data,
|
|
sizeof(snd_usb_midi_endpoint_info_t));
|
|
err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
|
|
break;
|
|
case QUIRK_MIDI_MIDITECH:
|
|
err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
|
|
break;
|
|
default:
|
|
snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
|
|
err = -ENXIO;
|
|
break;
|
|
}
|
|
}
|
|
if (err < 0) {
|
|
kfree(umidi);
|
|
return err;
|
|
}
|
|
|
|
/* create rawmidi device */
|
|
out_ports = 0;
|
|
in_ports = 0;
|
|
for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
|
|
out_ports += snd_usbmidi_count_bits(endpoints[i].out_cables);
|
|
in_ports += snd_usbmidi_count_bits(endpoints[i].in_cables);
|
|
}
|
|
err = snd_usbmidi_create_rawmidi(umidi, out_ports, in_ports);
|
|
if (err < 0) {
|
|
kfree(umidi);
|
|
return err;
|
|
}
|
|
|
|
/* create endpoint/port structures */
|
|
if (quirk && quirk->type == QUIRK_MIDI_MIDIMAN)
|
|
err = snd_usbmidi_create_endpoints_midiman(umidi, &endpoints[0]);
|
|
else
|
|
err = snd_usbmidi_create_endpoints(umidi, endpoints);
|
|
if (err < 0) {
|
|
snd_usbmidi_free(umidi);
|
|
return err;
|
|
}
|
|
|
|
list_add(&umidi->list, &umidi->chip->midi_list);
|
|
|
|
for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
|
|
snd_usbmidi_input_start_ep(umidi->endpoints[i].in);
|
|
return 0;
|
|
}
|
|
|
|
EXPORT_SYMBOL(snd_usb_create_midi_interface);
|
|
EXPORT_SYMBOL(snd_usbmidi_input_stop);
|
|
EXPORT_SYMBOL(snd_usbmidi_input_start);
|
|
EXPORT_SYMBOL(snd_usbmidi_disconnect);
|
|
|