--- /dev/null
+/*
+ * usbmidi.c - ALSA USB MIDI driver
+ *
+ * Copyright (c) 2002-2009 Clemens Ladisch
+ * All rights reserved.
+ *
+ * Based on the OSS usb-midi driver by NAGANO Daisuke,
+ * NetBSD's umidi driver by Takuya SHIOZAKI,
+ * the "USB Device Class Definition for MIDI Devices" by Roland
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed and/or modified 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 SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/bitops.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/timer.h>
+#include <linux/usb.h>
+#include <linux/wait.h>
+#include <linux/usb/audio.h>
+#include <linux/module.h>
+
+#include <sound/core.h>
+#include <sound/control.h>
+#include <sound/rawmidi.h>
+#include <sound/asequencer.h>
+#include "usbaudio.h"
+#include "midi.h"
+#include "power.h"
+#include "helper.h"
+
+/*
+ * define this to log all USB packets
+ */
+/* #define DUMP_PACKETS */
+
+/*
+ * how long to wait after some USB errors, so that hub_wq can disconnect() us
+ * without too many spurious errors
+ */
+#define ERROR_DELAY_JIFFIES (HZ / 10)
+
+#define OUTPUT_URBS 7
+#define INPUT_URBS 7
+
+
+MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
+MODULE_DESCRIPTION("USB Audio/MIDI helper module");
+MODULE_LICENSE("Dual BSD/GPL");
+
+
+struct usb_ms_header_descriptor {
+ __u8 bLength;
+ __u8 bDescriptorType;
+ __u8 bDescriptorSubtype;
+ __u8 bcdMSC[2];
+ __le16 wTotalLength;
+} __attribute__ ((packed));
+
+struct usb_ms_endpoint_descriptor {
+ __u8 bLength;
+ __u8 bDescriptorType;
+ __u8 bDescriptorSubtype;
+ __u8 bNumEmbMIDIJack;
+ __u8 baAssocJackID[0];
+} __attribute__ ((packed));
+
+struct snd_usb_midi_in_endpoint;
+struct snd_usb_midi_out_endpoint;
+struct snd_usb_midi_endpoint;
+
+struct usb_protocol_ops {
+ void (*input)(struct snd_usb_midi_in_endpoint*, uint8_t*, int);
+ void (*output)(struct snd_usb_midi_out_endpoint *ep, struct urb *urb);
+ void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t);
+ void (*init_out_endpoint)(struct snd_usb_midi_out_endpoint *);
+ void (*finish_out_endpoint)(struct snd_usb_midi_out_endpoint *);
+};
+
+struct snd_usb_midi {
+ struct usb_device *dev;
+ struct snd_card *card;
+ struct usb_interface *iface;
+ const struct snd_usb_audio_quirk *quirk;
+ struct snd_rawmidi *rmidi;
+ struct usb_protocol_ops *usb_protocol_ops;
+ struct list_head list;
+ struct timer_list error_timer;
+ spinlock_t disc_lock;
+ struct rw_semaphore disc_rwsem;
+ struct mutex mutex;
+ u32 usb_id;
+ int next_midi_device;
+
+ struct snd_usb_midi_endpoint {
+ struct snd_usb_midi_out_endpoint *out;
+ struct snd_usb_midi_in_endpoint *in;
+ } endpoints[MIDI_MAX_ENDPOINTS];
+ unsigned long input_triggered;
+ unsigned int opened[2];
+ unsigned char disconnected;
+ unsigned char input_running;
+
+ struct snd_kcontrol *roland_load_ctl;
+};
+
+struct snd_usb_midi_out_endpoint {
+ struct snd_usb_midi *umidi;
+ struct out_urb_context {
+ struct urb *urb;
+ struct snd_usb_midi_out_endpoint *ep;
+ } urbs[OUTPUT_URBS];
+ unsigned int active_urbs;
+ unsigned int drain_urbs;
+ int max_transfer; /* size of urb buffer */
+ struct tasklet_struct tasklet;
+ unsigned int next_urb;
+ spinlock_t buffer_lock;
+
+ struct usbmidi_out_port {
+ struct snd_usb_midi_out_endpoint *ep;
+ struct snd_rawmidi_substream *substream;
+ int active;
+ uint8_t cable; /* cable number << 4 */
+ uint8_t state;
+#define STATE_UNKNOWN 0
+#define STATE_1PARAM 1
+#define STATE_2PARAM_1 2
+#define STATE_2PARAM_2 3
+#define STATE_SYSEX_0 4
+#define STATE_SYSEX_1 5
+#define STATE_SYSEX_2 6
+ uint8_t data[2];
+ } ports[0x10];
+ int current_port;
+
+ wait_queue_head_t drain_wait;
+};
+
+struct snd_usb_midi_in_endpoint {
+ struct snd_usb_midi *umidi;
+ struct urb *urbs[INPUT_URBS];
+ struct usbmidi_in_port {
+ struct snd_rawmidi_substream *substream;
+ u8 running_status_length;
+ } ports[0x10];
+ u8 seen_f5;
+ u8 error_resubmit;
+ int current_port;
+};
+
+static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep);
+
+static const uint8_t snd_usbmidi_cin_length[] = {
+ 0, 0, 2, 3, 3, 1, 2, 3, 3, 3, 3, 3, 2, 2, 3, 1
+};
+
+/*
+ * Submits the URB, with error handling.
+ */
+static int snd_usbmidi_submit_urb(struct urb *urb, gfp_t flags)
+{
+ int err = usb_submit_urb(urb, flags);
+ if (err < 0 && err != -ENODEV)
+ dev_err(&urb->dev->dev, "usb_submit_urb: %d\n", err);
+ return err;
+}
+
+/*
+ * Error handling for URB completion functions.
+ */
+static int snd_usbmidi_urb_error(const struct urb *urb)
+{
+ switch (urb->status) {
+ /* manually unlinked, or device gone */
+ case -ENOENT:
+ case -ECONNRESET:
+ case -ESHUTDOWN:
+ case -ENODEV:
+ return -ENODEV;
+ /* errors that might occur during unplugging */
+ case -EPROTO:
+ case -ETIME:
+ case -EILSEQ:
+ return -EIO;
+ default:
+ dev_err(&urb->dev->dev, "urb status %d\n", urb->status);
+ return 0; /* continue */
+ }
+}
+
+/*
+ * Receives a chunk of MIDI data.
+ */
+static void snd_usbmidi_input_data(struct snd_usb_midi_in_endpoint *ep,
+ int portidx, uint8_t *data, int length)
+{
+ struct usbmidi_in_port *port = &ep->ports[portidx];
+
+ if (!port->substream) {
+ dev_dbg(&ep->umidi->dev->dev, "unexpected port %d!\n", portidx);
+ return;
+ }
+ if (!test_bit(port->substream->number, &ep->umidi->input_triggered))
+ return;
+ snd_rawmidi_receive(port->substream, data, length);
+}
+
+#ifdef DUMP_PACKETS
+static void dump_urb(const char *type, const u8 *data, int length)
+{
+ snd_printk(KERN_DEBUG "%s packet: [", type);
+ for (; length > 0; ++data, --length)
+ printk(" %02x", *data);
+ printk(" ]\n");
+}
+#else
+#define dump_urb(type, data, length) /* nothing */
+#endif
+
+/*
+ * Processes the data read from the device.
+ */
+static void snd_usbmidi_in_urb_complete(struct urb *urb)
+{
+ struct snd_usb_midi_in_endpoint *ep = urb->context;
+
+ if (urb->status == 0) {
+ dump_urb("received", urb->transfer_buffer, urb->actual_length);
+ ep->umidi->usb_protocol_ops->input(ep, urb->transfer_buffer,
+ urb->actual_length);
+ } else {
+ int err = snd_usbmidi_urb_error(urb);
+ if (err < 0) {
+ if (err != -ENODEV) {
+ ep->error_resubmit = 1;
+ mod_timer(&ep->umidi->error_timer,
+ jiffies + ERROR_DELAY_JIFFIES);
+ }
+ return;
+ }
+ }
+
+ urb->dev = ep->umidi->dev;
+ snd_usbmidi_submit_urb(urb, GFP_ATOMIC);
+}
+
+static void snd_usbmidi_out_urb_complete(struct urb *urb)
+{
+ struct out_urb_context *context = urb->context;
+ struct snd_usb_midi_out_endpoint *ep = context->ep;
+ unsigned int urb_index;
+
+ spin_lock(&ep->buffer_lock);
+ urb_index = context - ep->urbs;
+ ep->active_urbs &= ~(1 << urb_index);
+ if (unlikely(ep->drain_urbs)) {
+ ep->drain_urbs &= ~(1 << urb_index);
+ wake_up(&ep->drain_wait);
+ }
+ spin_unlock(&ep->buffer_lock);
+ if (urb->status < 0) {
+ int err = snd_usbmidi_urb_error(urb);
+ if (err < 0) {
+ if (err != -ENODEV)
+ mod_timer(&ep->umidi->error_timer,
+ jiffies + ERROR_DELAY_JIFFIES);
+ return;
+ }
+ }
+ snd_usbmidi_do_output(ep);
+}
+
+/*
+ * This is called when some data should be transferred to the device
+ * (from one or more substreams).
+ */
+static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep)
+{
+ unsigned int urb_index;
+ struct urb *urb;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ep->buffer_lock, flags);
+ if (ep->umidi->disconnected) {
+ spin_unlock_irqrestore(&ep->buffer_lock, flags);
+ return;
+ }
+
+ urb_index = ep->next_urb;
+ for (;;) {
+ if (!(ep->active_urbs & (1 << urb_index))) {
+ urb = ep->urbs[urb_index].urb;
+ urb->transfer_buffer_length = 0;
+ ep->umidi->usb_protocol_ops->output(ep, urb);
+ if (urb->transfer_buffer_length == 0)
+ break;
+
+ dump_urb("sending", urb->transfer_buffer,
+ urb->transfer_buffer_length);
+ urb->dev = ep->umidi->dev;
+ if (snd_usbmidi_submit_urb(urb, GFP_ATOMIC) < 0)
+ break;
+ ep->active_urbs |= 1 << urb_index;
+ }
+ if (++urb_index >= OUTPUT_URBS)
+ urb_index = 0;
+ if (urb_index == ep->next_urb)
+ break;
+ }
+ ep->next_urb = urb_index;
+ spin_unlock_irqrestore(&ep->buffer_lock, flags);
+}
+
+static void snd_usbmidi_out_tasklet(unsigned long data)
+{
+ struct snd_usb_midi_out_endpoint *ep =
+ (struct snd_usb_midi_out_endpoint *) data;
+
+ snd_usbmidi_do_output(ep);
+}
+
+/* called after transfers had been interrupted due to some USB error */
+static void snd_usbmidi_error_timer(unsigned long data)
+{
+ struct snd_usb_midi *umidi = (struct snd_usb_midi *)data;
+ unsigned int i, j;
+
+ spin_lock(&umidi->disc_lock);
+ if (umidi->disconnected) {
+ spin_unlock(&umidi->disc_lock);
+ return;
+ }
+ for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
+ struct snd_usb_midi_in_endpoint *in = umidi->endpoints[i].in;
+ if (in && in->error_resubmit) {
+ in->error_resubmit = 0;
+ for (j = 0; j < INPUT_URBS; ++j) {
+ if (atomic_read(&in->urbs[j]->use_count))
+ continue;
+ in->urbs[j]->dev = umidi->dev;
+ snd_usbmidi_submit_urb(in->urbs[j], GFP_ATOMIC);
+ }
+ }
+ if (umidi->endpoints[i].out)
+ snd_usbmidi_do_output(umidi->endpoints[i].out);
+ }
+ spin_unlock(&umidi->disc_lock);
+}
+
+/* helper function to send static data that may not DMA-able */
+static int send_bulk_static_data(struct snd_usb_midi_out_endpoint *ep,
+ const void *data, int len)
+{
+ int err = 0;
+ void *buf = kmemdup(data, len, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+ dump_urb("sending", buf, len);
+ if (ep->urbs[0].urb)
+ err = usb_bulk_msg(ep->umidi->dev, ep->urbs[0].urb->pipe,
+ buf, len, NULL, 250);
+ kfree(buf);
+ return err;
+}
+
+/*
+ * Standard USB MIDI protocol: see the spec.
+ * Midiman protocol: like the standard protocol, but the control byte is the
+ * fourth byte in each packet, and uses length instead of CIN.
+ */
+
+static void snd_usbmidi_standard_input(struct snd_usb_midi_in_endpoint *ep,
+ uint8_t *buffer, int buffer_length)
+{
+ int i;
+
+ for (i = 0; i + 3 < buffer_length; i += 4)
+ if (buffer[i] != 0) {
+ int cable = buffer[i] >> 4;
+ int length = snd_usbmidi_cin_length[buffer[i] & 0x0f];
+ snd_usbmidi_input_data(ep, cable, &buffer[i + 1],
+ length);
+ }
+}
+
+static void snd_usbmidi_midiman_input(struct snd_usb_midi_in_endpoint *ep,
+ uint8_t *buffer, int buffer_length)
+{
+ int i;
+
+ for (i = 0; i + 3 < buffer_length; i += 4)
+ if (buffer[i + 3] != 0) {
+ int port = buffer[i + 3] >> 4;
+ int length = buffer[i + 3] & 3;
+ snd_usbmidi_input_data(ep, port, &buffer[i], length);
+ }
+}
+
+/*
+ * Buggy M-Audio device: running status on input results in a packet that has
+ * the data bytes but not the status byte and that is marked with CIN 4.
+ */
+static void snd_usbmidi_maudio_broken_running_status_input(
+ struct snd_usb_midi_in_endpoint *ep,
+ uint8_t *buffer, int buffer_length)
+{
+ int i;
+
+ for (i = 0; i + 3 < buffer_length; i += 4)
+ if (buffer[i] != 0) {
+ int cable = buffer[i] >> 4;
+ u8 cin = buffer[i] & 0x0f;
+ struct usbmidi_in_port *port = &ep->ports[cable];
+ int length;
+
+ length = snd_usbmidi_cin_length[cin];
+ if (cin == 0xf && buffer[i + 1] >= 0xf8)
+ ; /* realtime msg: no running status change */
+ else if (cin >= 0x8 && cin <= 0xe)
+ /* channel msg */
+ port->running_status_length = length - 1;
+ else if (cin == 0x4 &&
+ port->running_status_length != 0 &&
+ buffer[i + 1] < 0x80)
+ /* CIN 4 that is not a SysEx */
+ length = port->running_status_length;
+ else
+ /*
+ * All other msgs cannot begin running status.
+ * (A channel msg sent as two or three CIN 0xF
+ * packets could in theory, but this device
+ * doesn't use this format.)
+ */
+ port->running_status_length = 0;
+ snd_usbmidi_input_data(ep, cable, &buffer[i + 1],
+ length);
+ }
+}
+
+/*
+ * CME protocol: like the standard protocol, but SysEx commands are sent as a
+ * single USB packet preceded by a 0x0F byte.
+ */
+static void snd_usbmidi_cme_input(struct snd_usb_midi_in_endpoint *ep,
+ uint8_t *buffer, int buffer_length)
+{
+ if (buffer_length < 2 || (buffer[0] & 0x0f) != 0x0f)
+ snd_usbmidi_standard_input(ep, buffer, buffer_length);
+ else
+ snd_usbmidi_input_data(ep, buffer[0] >> 4,
+ &buffer[1], buffer_length - 1);
+}
+
+/*
+ * Adds one USB MIDI packet to the output buffer.
+ */
+static void snd_usbmidi_output_standard_packet(struct urb *urb, uint8_t p0,
+ uint8_t p1, uint8_t p2,
+ uint8_t p3)
+{
+
+ uint8_t *buf =
+ (uint8_t *)urb->transfer_buffer + urb->transfer_buffer_length;
+ buf[0] = p0;
+ buf[1] = p1;
+ buf[2] = p2;
+ buf[3] = p3;
+ urb->transfer_buffer_length += 4;
+}
+
+/*
+ * Adds one Midiman packet to the output buffer.
+ */
+static void snd_usbmidi_output_midiman_packet(struct urb *urb, uint8_t p0,
+ uint8_t p1, uint8_t p2,
+ uint8_t p3)
+{
+
+ uint8_t *buf =
+ (uint8_t *)urb->transfer_buffer + urb->transfer_buffer_length;
+ buf[0] = p1;
+ buf[1] = p2;
+ buf[2] = p3;
+ buf[3] = (p0 & 0xf0) | snd_usbmidi_cin_length[p0 & 0x0f];
+ urb->transfer_buffer_length += 4;
+}
+
+/*
+ * Converts MIDI commands to USB MIDI packets.
+ */
+static void snd_usbmidi_transmit_byte(struct usbmidi_out_port *port,
+ uint8_t b, struct urb *urb)
+{
+ uint8_t p0 = port->cable;
+ void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t) =
+ port->ep->umidi->usb_protocol_ops->output_packet;
+
+ if (b >= 0xf8) {
+ output_packet(urb, p0 | 0x0f, b, 0, 0);
+ } else if (b >= 0xf0) {
+ switch (b) {
+ case 0xf0:
+ port->data[0] = b;
+ port->state = STATE_SYSEX_1;
+ break;
+ case 0xf1:
+ case 0xf3:
+ port->data[0] = b;
+ port->state = STATE_1PARAM;
+ break;
+ case 0xf2:
+ port->data[0] = b;
+ port->state = STATE_2PARAM_1;
+ break;
+ case 0xf4:
+ case 0xf5:
+ port->state = STATE_UNKNOWN;
+ break;
+ case 0xf6:
+ output_packet(urb, p0 | 0x05, 0xf6, 0, 0);
+ port->state = STATE_UNKNOWN;
+ break;
+ case 0xf7:
+ switch (port->state) {
+ case STATE_SYSEX_0:
+ output_packet(urb, p0 | 0x05, 0xf7, 0, 0);
+ 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) {
+ port->data[0] = b;
+ if (b >= 0xc0 && b <= 0xdf)
+ port->state = STATE_1PARAM;
+ else
+ port->state = STATE_2PARAM_1;
+ } else { /* b < 0x80 */
+ switch (port->state) {
+ 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(struct snd_usb_midi_out_endpoint *ep,
+ struct urb *urb)
+{
+ int p;
+
+ /* FIXME: lower-numbered ports can starve higher-numbered ports */
+ for (p = 0; p < 0x10; ++p) {
+ struct usbmidi_out_port *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,
+};
+
+static struct usb_protocol_ops snd_usbmidi_maudio_broken_running_status_ops = {
+ .input = snd_usbmidi_maudio_broken_running_status_input,
+ .output = snd_usbmidi_standard_output,
+ .output_packet = snd_usbmidi_output_standard_packet,
+};
+
+static struct usb_protocol_ops snd_usbmidi_cme_ops = {
+ .input = snd_usbmidi_cme_input,
+ .output = snd_usbmidi_standard_output,
+ .output_packet = snd_usbmidi_output_standard_packet,
+};
+
+/*
+ * AKAI MPD16 protocol:
+ *
+ * For control port (endpoint 1):
+ * ==============================
+ * One or more chunks consisting of first byte of (0x10 | msg_len) and then a
+ * SysEx message (msg_len=9 bytes long).
+ *
+ * For data port (endpoint 2):
+ * ===========================
+ * One or more chunks consisting of first byte of (0x20 | msg_len) and then a
+ * MIDI message (msg_len bytes long)
+ *
+ * Messages sent: Active Sense, Note On, Poly Pressure, Control Change.
+ */
+static void snd_usbmidi_akai_input(struct snd_usb_midi_in_endpoint *ep,
+ uint8_t *buffer, int buffer_length)
+{
+ unsigned int pos = 0;
+ unsigned int len = (unsigned int)buffer_length;
+ while (pos < len) {
+ unsigned int port = (buffer[pos] >> 4) - 1;
+ unsigned int msg_len = buffer[pos] & 0x0f;
+ pos++;
+ if (pos + msg_len <= len && port < 2)
+ snd_usbmidi_input_data(ep, 0, &buffer[pos], msg_len);
+ pos += msg_len;
+ }
+}
+
+#define MAX_AKAI_SYSEX_LEN 9
+
+static void snd_usbmidi_akai_output(struct snd_usb_midi_out_endpoint *ep,
+ struct urb *urb)
+{
+ uint8_t *msg;
+ int pos, end, count, buf_end;
+ uint8_t tmp[MAX_AKAI_SYSEX_LEN];
+ struct snd_rawmidi_substream *substream = ep->ports[0].substream;
+
+ if (!ep->ports[0].active)
+ return;
+
+ msg = urb->transfer_buffer + urb->transfer_buffer_length;
+ buf_end = ep->max_transfer - MAX_AKAI_SYSEX_LEN - 1;
+
+ /* only try adding more data when there's space for at least 1 SysEx */
+ while (urb->transfer_buffer_length < buf_end) {
+ count = snd_rawmidi_transmit_peek(substream,
+ tmp, MAX_AKAI_SYSEX_LEN);
+ if (!count) {
+ ep->ports[0].active = 0;
+ return;
+ }
+ /* try to skip non-SysEx data */
+ for (pos = 0; pos < count && tmp[pos] != 0xF0; pos++)
+ ;
+
+ if (pos > 0) {
+ snd_rawmidi_transmit_ack(substream, pos);
+ continue;
+ }
+
+ /* look for the start or end marker */
+ for (end = 1; end < count && tmp[end] < 0xF0; end++)
+ ;
+
+ /* next SysEx started before the end of current one */
+ if (end < count && tmp[end] == 0xF0) {
+ /* it's incomplete - drop it */
+ snd_rawmidi_transmit_ack(substream, end);
+ continue;
+ }
+ /* SysEx complete */
+ if (end < count && tmp[end] == 0xF7) {
+ /* queue it, ack it, and get the next one */
+ count = end + 1;
+ msg[0] = 0x10 | count;
+ memcpy(&msg[1], tmp, count);
+ snd_rawmidi_transmit_ack(substream, count);
+ urb->transfer_buffer_length += count + 1;
+ msg += count + 1;
+ continue;
+ }
+ /* less than 9 bytes and no end byte - wait for more */
+ if (count < MAX_AKAI_SYSEX_LEN) {
+ ep->ports[0].active = 0;
+ return;
+ }
+ /* 9 bytes and no end marker in sight - malformed, skip it */
+ snd_rawmidi_transmit_ack(substream, count);
+ }
+}
+
+static struct usb_protocol_ops snd_usbmidi_akai_ops = {
+ .input = snd_usbmidi_akai_input,
+ .output = snd_usbmidi_akai_output,
+};
+
+/*
+ * 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(struct snd_usb_midi_in_endpoint *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(struct snd_usb_midi_out_endpoint *ep,
+ struct urb *urb)
+{
+ uint8_t *transfer_buffer;
+ int count;
+
+ if (!ep->ports[0].active)
+ return;
+ transfer_buffer = 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;
+ 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: just move raw MIDI bytes from/to the endpoint
+ */
+
+static void snd_usbmidi_raw_input(struct snd_usb_midi_in_endpoint *ep,
+ uint8_t *buffer, int buffer_length)
+{
+ snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
+}
+
+static void snd_usbmidi_raw_output(struct snd_usb_midi_out_endpoint *ep,
+ struct urb *urb)
+{
+ int count;
+
+ if (!ep->ports[0].active)
+ return;
+ count = snd_rawmidi_transmit(ep->ports[0].substream,
+ urb->transfer_buffer,
+ ep->max_transfer);
+ if (count < 1) {
+ ep->ports[0].active = 0;
+ return;
+ }
+ urb->transfer_buffer_length = count;
+}
+
+static struct usb_protocol_ops snd_usbmidi_raw_ops = {
+ .input = snd_usbmidi_raw_input,
+ .output = snd_usbmidi_raw_output,
+};
+
+/*
+ * FTDI protocol: raw MIDI bytes, but input packets have two modem status bytes.
+ */
+
+static void snd_usbmidi_ftdi_input(struct snd_usb_midi_in_endpoint *ep,
+ uint8_t *buffer, int buffer_length)
+{
+ if (buffer_length > 2)
+ snd_usbmidi_input_data(ep, 0, buffer + 2, buffer_length - 2);
+}
+
+static struct usb_protocol_ops snd_usbmidi_ftdi_ops = {
+ .input = snd_usbmidi_ftdi_input,
+ .output = snd_usbmidi_raw_output,
+};
+
+static void snd_usbmidi_us122l_input(struct snd_usb_midi_in_endpoint *ep,
+ uint8_t *buffer, int buffer_length)
+{
+ if (buffer_length != 9)
+ return;
+ buffer_length = 8;
+ while (buffer_length && buffer[buffer_length - 1] == 0xFD)
+ buffer_length--;
+ if (buffer_length)
+ snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
+}
+
+static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep,
+ struct urb *urb)
+{
+ int count;
+
+ if (!ep->ports[0].active)
+ return;
+ switch (snd_usb_get_speed(ep->umidi->dev)) {
+ case USB_SPEED_HIGH:
+ case USB_SPEED_SUPER:
+ count = 1;
+ break;
+ default:
+ count = 2;
+ }
+ count = snd_rawmidi_transmit(ep->ports[0].substream,
+ urb->transfer_buffer,
+ count);
+ if (count < 1) {
+ ep->ports[0].active = 0;
+ return;
+ }
+
+ memset(urb->transfer_buffer + count, 0xFD, ep->max_transfer - count);
+ urb->transfer_buffer_length = ep->max_transfer;
+}
+
+static struct usb_protocol_ops snd_usbmidi_122l_ops = {
+ .input = snd_usbmidi_us122l_input,
+ .output = snd_usbmidi_us122l_output,
+};
+
+/*
+ * Emagic USB MIDI protocol: raw MIDI with "F5 xx" port switching.
+ */
+
+static void snd_usbmidi_emagic_init_out(struct snd_usb_midi_out_endpoint *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(struct snd_usb_midi_out_endpoint *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(struct snd_usb_midi_in_endpoint *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(struct snd_usb_midi_out_endpoint *ep,
+ struct urb *urb)
+{
+ int port0 = ep->current_port;
+ uint8_t *buf = 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;
+ struct usbmidi_out_port *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;
+ }
+ 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 void update_roland_altsetting(struct snd_usb_midi *umidi)
+{
+ struct usb_interface *intf;
+ struct usb_host_interface *hostif;
+ struct usb_interface_descriptor *intfd;
+ int is_light_load;
+
+ intf = umidi->iface;
+ is_light_load = intf->cur_altsetting != intf->altsetting;
+ if (umidi->roland_load_ctl->private_value == is_light_load)
+ return;
+ hostif = &intf->altsetting[umidi->roland_load_ctl->private_value];
+ intfd = get_iface_desc(hostif);
+ snd_usbmidi_input_stop(&umidi->list);
+ usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
+ intfd->bAlternateSetting);
+ snd_usbmidi_input_start(&umidi->list);
+}
+
+static int substream_open(struct snd_rawmidi_substream *substream, int dir,
+ int open)
+{
+ struct snd_usb_midi *umidi = substream->rmidi->private_data;
+ struct snd_kcontrol *ctl;
+
+ down_read(&umidi->disc_rwsem);
+ if (umidi->disconnected) {
+ up_read(&umidi->disc_rwsem);
+ return open ? -ENODEV : 0;
+ }
+
+ mutex_lock(&umidi->mutex);
+ if (open) {
+ if (!umidi->opened[0] && !umidi->opened[1]) {
+ if (umidi->roland_load_ctl) {
+ ctl = umidi->roland_load_ctl;
+ ctl->vd[0].access |=
+ SNDRV_CTL_ELEM_ACCESS_INACTIVE;
+ snd_ctl_notify(umidi->card,
+ SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
+ update_roland_altsetting(umidi);
+ }
+ }
+ umidi->opened[dir]++;
+ if (umidi->opened[1])
+ snd_usbmidi_input_start(&umidi->list);
+ } else {
+ umidi->opened[dir]--;
+ if (!umidi->opened[1])
+ snd_usbmidi_input_stop(&umidi->list);
+ if (!umidi->opened[0] && !umidi->opened[1]) {
+ if (umidi->roland_load_ctl) {
+ ctl = umidi->roland_load_ctl;
+ ctl->vd[0].access &=
+ ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
+ snd_ctl_notify(umidi->card,
+ SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
+ }
+ }
+ }
+ mutex_unlock(&umidi->mutex);
+ up_read(&umidi->disc_rwsem);
+ return 0;
+}
+
+static int snd_usbmidi_output_open(struct snd_rawmidi_substream *substream)
+{
+ struct snd_usb_midi *umidi = substream->rmidi->private_data;
+ struct usbmidi_out_port *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 substream_open(substream, 0, 1);
+}
+
+static int snd_usbmidi_output_close(struct snd_rawmidi_substream *substream)
+{
+ return substream_open(substream, 0, 0);
+}
+
+static void snd_usbmidi_output_trigger(struct snd_rawmidi_substream *substream,
+ int up)
+{
+ struct usbmidi_out_port *port =
+ (struct usbmidi_out_port *)substream->runtime->private_data;
+
+ port->active = up;
+ if (up) {
+ if (port->ep->umidi->disconnected) {
+ /* 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_schedule(&port->ep->tasklet);
+ }
+}
+
+static void snd_usbmidi_output_drain(struct snd_rawmidi_substream *substream)
+{
+ struct usbmidi_out_port *port = substream->runtime->private_data;
+ struct snd_usb_midi_out_endpoint *ep = port->ep;
+ unsigned int drain_urbs;
+ DEFINE_WAIT(wait);
+ long timeout = msecs_to_jiffies(50);
+
+ if (ep->umidi->disconnected)
+ return;
+ /*
+ * The substream buffer is empty, but some data might still be in the
+ * currently active URBs, so we have to wait for those to complete.
+ */
+ spin_lock_irq(&ep->buffer_lock);
+ drain_urbs = ep->active_urbs;
+ if (drain_urbs) {
+ ep->drain_urbs |= drain_urbs;
+ do {
+ prepare_to_wait(&ep->drain_wait, &wait,
+ TASK_UNINTERRUPTIBLE);
+ spin_unlock_irq(&ep->buffer_lock);
+ timeout = schedule_timeout(timeout);
+ spin_lock_irq(&ep->buffer_lock);
+ drain_urbs &= ep->drain_urbs;
+ } while (drain_urbs && timeout);
+ finish_wait(&ep->drain_wait, &wait);
+ }
+ spin_unlock_irq(&ep->buffer_lock);
+}
+
+static int snd_usbmidi_input_open(struct snd_rawmidi_substream *substream)
+{
+ return substream_open(substream, 1, 1);
+}
+
+static int snd_usbmidi_input_close(struct snd_rawmidi_substream *substream)
+{
+ return substream_open(substream, 1, 0);
+}
+
+static void snd_usbmidi_input_trigger(struct snd_rawmidi_substream *substream,
+ int up)
+{
+ struct snd_usb_midi *umidi = substream->rmidi->private_data;
+
+ if (up)
+ set_bit(substream->number, &umidi->input_triggered);
+ else
+ clear_bit(substream->number, &umidi->input_triggered);
+}
+
+static struct snd_rawmidi_ops snd_usbmidi_output_ops = {
+ .open = snd_usbmidi_output_open,
+ .close = snd_usbmidi_output_close,
+ .trigger = snd_usbmidi_output_trigger,
+ .drain = snd_usbmidi_output_drain,
+};
+
+static struct snd_rawmidi_ops snd_usbmidi_input_ops = {
+ .open = snd_usbmidi_input_open,
+ .close = snd_usbmidi_input_close,
+ .trigger = snd_usbmidi_input_trigger
+};
+
+static void free_urb_and_buffer(struct snd_usb_midi *umidi, struct urb *urb,
+ unsigned int buffer_length)
+{
+ usb_free_coherent(umidi->dev, buffer_length,
+ urb->transfer_buffer, urb->transfer_dma);
+ usb_free_urb(urb);
+}
+
+/*
+ * Frees an input endpoint.
+ * May be called when ep hasn't been initialized completely.
+ */
+static void snd_usbmidi_in_endpoint_delete(struct snd_usb_midi_in_endpoint *ep)
+{
+ unsigned int i;
+
+ for (i = 0; i < INPUT_URBS; ++i)
+ if (ep->urbs[i])
+ free_urb_and_buffer(ep->umidi, ep->urbs[i],
+ ep->urbs[i]->transfer_buffer_length);
+ kfree(ep);
+}
+
+/*
+ * Creates an input endpoint.
+ */
+static int snd_usbmidi_in_endpoint_create(struct snd_usb_midi *umidi,
+ struct snd_usb_midi_endpoint_info *ep_info,
+ struct snd_usb_midi_endpoint *rep)
+{
+ struct snd_usb_midi_in_endpoint *ep;
+ void *buffer;
+ unsigned int pipe;
+ int length;
+ unsigned int i;
+
+ rep->in = NULL;
+ ep = kzalloc(sizeof(*ep), GFP_KERNEL);
+ if (!ep)
+ return -ENOMEM;
+ ep->umidi = umidi;
+
+ for (i = 0; i < INPUT_URBS; ++i) {
+ ep->urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
+ if (!ep->urbs[i]) {
+ snd_usbmidi_in_endpoint_delete(ep);
+ return -ENOMEM;
+ }
+ }
+ if (ep_info->in_interval)
+ pipe = usb_rcvintpipe(umidi->dev, ep_info->in_ep);
+ else
+ pipe = usb_rcvbulkpipe(umidi->dev, ep_info->in_ep);
+ length = usb_maxpacket(umidi->dev, pipe, 0);
+ for (i = 0; i < INPUT_URBS; ++i) {
+ buffer = usb_alloc_coherent(umidi->dev, length, GFP_KERNEL,
+ &ep->urbs[i]->transfer_dma);
+ if (!buffer) {
+ snd_usbmidi_in_endpoint_delete(ep);
+ return -ENOMEM;
+ }
+ if (ep_info->in_interval)
+ usb_fill_int_urb(ep->urbs[i], umidi->dev,
+ pipe, buffer, length,
+ snd_usbmidi_in_urb_complete,
+ ep, ep_info->in_interval);
+ else
+ usb_fill_bulk_urb(ep->urbs[i], umidi->dev,
+ pipe, buffer, length,
+ snd_usbmidi_in_urb_complete, ep);
+ ep->urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
+ }
+
+ rep->in = ep;
+ return 0;
+}
+
+/*
+ * Frees an output endpoint.
+ * May be called when ep hasn't been initialized completely.
+ */
+static void snd_usbmidi_out_endpoint_clear(struct snd_usb_midi_out_endpoint *ep)
+{
+ unsigned int i;
+
+ for (i = 0; i < OUTPUT_URBS; ++i)
+ if (ep->urbs[i].urb) {
+ free_urb_and_buffer(ep->umidi, ep->urbs[i].urb,
+ ep->max_transfer);
+ ep->urbs[i].urb = NULL;
+ }
+}
+
+static void snd_usbmidi_out_endpoint_delete(struct snd_usb_midi_out_endpoint *ep)
+{
+ snd_usbmidi_out_endpoint_clear(ep);
+ kfree(ep);
+}
+
+/*
+ * Creates an output endpoint, and initializes output ports.
+ */
+static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi *umidi,
+ struct snd_usb_midi_endpoint_info *ep_info,
+ struct snd_usb_midi_endpoint *rep)
+{
+ struct snd_usb_midi_out_endpoint *ep;
+ unsigned int i;
+ unsigned int pipe;
+ void *buffer;
+
+ rep->out = NULL;
+ ep = kzalloc(sizeof(*ep), GFP_KERNEL);
+ if (!ep)
+ return -ENOMEM;
+ ep->umidi = umidi;
+
+ for (i = 0; i < OUTPUT_URBS; ++i) {
+ ep->urbs[i].urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!ep->urbs[i].urb) {
+ snd_usbmidi_out_endpoint_delete(ep);
+ return -ENOMEM;
+ }
+ ep->urbs[i].ep = ep;
+ }
+ if (ep_info->out_interval)
+ pipe = usb_sndintpipe(umidi->dev, ep_info->out_ep);
+ else
+ pipe = usb_sndbulkpipe(umidi->dev, ep_info->out_ep);
+ switch (umidi->usb_id) {
+ default:
+ ep->max_transfer = usb_maxpacket(umidi->dev, pipe, 1);
+ break;
+ /*
+ * Various chips declare a packet size larger than 4 bytes, but
+ * do not actually work with larger packets:
+ */
+ case USB_ID(0x0a92, 0x1020): /* ESI M4U */
+ case USB_ID(0x1430, 0x474b): /* RedOctane GH MIDI INTERFACE */
+ case USB_ID(0x15ca, 0x0101): /* Textech USB Midi Cable */
+ case USB_ID(0x15ca, 0x1806): /* Textech USB Midi Cable */
+ case USB_ID(0x1a86, 0x752d): /* QinHeng CH345 "USB2.0-MIDI" */
+ case USB_ID(0xfc08, 0x0101): /* Unknown vendor Cable */
+ ep->max_transfer = 4;
+ break;
+ /*
+ * Some devices only work with 9 bytes packet size:
+ */
+ case USB_ID(0x0644, 0x800E): /* Tascam US-122L */
+ case USB_ID(0x0644, 0x800F): /* Tascam US-144 */
+ ep->max_transfer = 9;
+ break;
+ }
+ for (i = 0; i < OUTPUT_URBS; ++i) {
+ buffer = usb_alloc_coherent(umidi->dev,
+ ep->max_transfer, GFP_KERNEL,
+ &ep->urbs[i].urb->transfer_dma);
+ if (!buffer) {
+ snd_usbmidi_out_endpoint_delete(ep);
+ return -ENOMEM;
+ }
+ if (ep_info->out_interval)
+ usb_fill_int_urb(ep->urbs[i].urb, umidi->dev,
+ pipe, buffer, ep->max_transfer,
+ snd_usbmidi_out_urb_complete,
+ &ep->urbs[i], ep_info->out_interval);
+ else
+ usb_fill_bulk_urb(ep->urbs[i].urb, umidi->dev,
+ pipe, buffer, ep->max_transfer,
+ snd_usbmidi_out_urb_complete,
+ &ep->urbs[i]);
+ ep->urbs[i].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);
+ init_waitqueue_head(&ep->drain_wait);
+
+ 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(struct snd_usb_midi *umidi)
+{
+ int i;
+
+ for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
+ struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
+ if (ep->out)
+ snd_usbmidi_out_endpoint_delete(ep->out);
+ if (ep->in)
+ snd_usbmidi_in_endpoint_delete(ep->in);
+ }
+ mutex_destroy(&umidi->mutex);
+ kfree(umidi);
+}
+
+/*
+ * Unlinks all URBs (must be done before the usb_device is deleted).
+ */
+void snd_usbmidi_disconnect(struct list_head *p)
+{
+ struct snd_usb_midi *umidi;
+ unsigned int i, j;
+
+ umidi = list_entry(p, struct snd_usb_midi, list);
+ /*
+ * an URB's completion handler may start the timer and
+ * a timer may submit an URB. To reliably break the cycle
+ * a flag under lock must be used
+ */
+ down_write(&umidi->disc_rwsem);
+ spin_lock_irq(&umidi->disc_lock);
+ umidi->disconnected = 1;
+ spin_unlock_irq(&umidi->disc_lock);
+ up_write(&umidi->disc_rwsem);
+
+ for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
+ struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
+ if (ep->out)
+ tasklet_kill(&ep->out->tasklet);
+ if (ep->out) {
+ for (j = 0; j < OUTPUT_URBS; ++j)
+ usb_kill_urb(ep->out->urbs[j].urb);
+ if (umidi->usb_protocol_ops->finish_out_endpoint)
+ umidi->usb_protocol_ops->finish_out_endpoint(ep->out);
+ ep->out->active_urbs = 0;
+ if (ep->out->drain_urbs) {
+ ep->out->drain_urbs = 0;
+ wake_up(&ep->out->drain_wait);
+ }
+ }
+ if (ep->in)
+ for (j = 0; j < INPUT_URBS; ++j)
+ usb_kill_urb(ep->in->urbs[j]);
+ /* free endpoints here; later call can result in Oops */
+ if (ep->out)
+ snd_usbmidi_out_endpoint_clear(ep->out);
+ if (ep->in) {
+ snd_usbmidi_in_endpoint_delete(ep->in);
+ ep->in = NULL;
+ }
+ }
+ del_timer_sync(&umidi->error_timer);
+}
+EXPORT_SYMBOL(snd_usbmidi_disconnect);
+
+static void snd_usbmidi_rawmidi_free(struct snd_rawmidi *rmidi)
+{
+ struct snd_usb_midi *umidi = rmidi->private_data;
+ snd_usbmidi_free(umidi);
+}
+
+static struct snd_rawmidi_substream *snd_usbmidi_find_substream(struct snd_usb_midi *umidi,
+ int stream,
+ int number)
+{
+ struct snd_rawmidi_substream *substream;
+
+ list_for_each_entry(substream, &umidi->rmidi->streams[stream].substreams,
+ 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 port_info {
+ u32 id;
+ short int port;
+ short int voices;
+ const char *name;
+ unsigned int seq_flags;
+} snd_usbmidi_port_info[] = {
+#define PORT_INFO(vendor, product, num, name_, voices_, flags) \
+ { .id = USB_ID(vendor, product), \
+ .port = num, .voices = voices_, \
+ .name = name_, .seq_flags = flags }
+#define EXTERNAL_PORT(vendor, product, num, name) \
+ PORT_INFO(vendor, product, num, name, 0, \
+ SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
+ SNDRV_SEQ_PORT_TYPE_HARDWARE | \
+ SNDRV_SEQ_PORT_TYPE_PORT)
+#define CONTROL_PORT(vendor, product, num, name) \
+ PORT_INFO(vendor, product, num, name, 0, \
+ SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
+ SNDRV_SEQ_PORT_TYPE_HARDWARE)
+#define GM_SYNTH_PORT(vendor, product, num, name, voices) \
+ PORT_INFO(vendor, product, num, name, voices, \
+ SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
+ SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
+ SNDRV_SEQ_PORT_TYPE_HARDWARE | \
+ SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
+#define ROLAND_SYNTH_PORT(vendor, product, num, name, voices) \
+ PORT_INFO(vendor, product, num, name, voices, \
+ SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
+ SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
+ SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \
+ SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
+ SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
+ SNDRV_SEQ_PORT_TYPE_HARDWARE | \
+ SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
+#define SOUNDCANVAS_PORT(vendor, product, num, name, voices) \
+ PORT_INFO(vendor, product, num, name, voices, \
+ SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | \
+ SNDRV_SEQ_PORT_TYPE_MIDI_GM | \
+ SNDRV_SEQ_PORT_TYPE_MIDI_GM2 | \
+ SNDRV_SEQ_PORT_TYPE_MIDI_GS | \
+ SNDRV_SEQ_PORT_TYPE_MIDI_XG | \
+ SNDRV_SEQ_PORT_TYPE_MIDI_MT32 | \
+ SNDRV_SEQ_PORT_TYPE_HARDWARE | \
+ SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
+ /* Yamaha MOTIF XF */
+ GM_SYNTH_PORT(0x0499, 0x105c, 0, "%s Tone Generator", 128),
+ CONTROL_PORT(0x0499, 0x105c, 1, "%s Remote Control"),
+ EXTERNAL_PORT(0x0499, 0x105c, 2, "%s Thru"),
+ CONTROL_PORT(0x0499, 0x105c, 3, "%s Editor"),
+ /* Roland UA-100 */
+ CONTROL_PORT(0x0582, 0x0000, 2, "%s Control"),
+ /* Roland SC-8850 */
+ SOUNDCANVAS_PORT(0x0582, 0x0003, 0, "%s Part A", 128),
+ SOUNDCANVAS_PORT(0x0582, 0x0003, 1, "%s Part B", 128),
+ SOUNDCANVAS_PORT(0x0582, 0x0003, 2, "%s Part C", 128),
+ SOUNDCANVAS_PORT(0x0582, 0x0003, 3, "%s Part D", 128),
+ EXTERNAL_PORT(0x0582, 0x0003, 4, "%s MIDI 1"),
+ EXTERNAL_PORT(0x0582, 0x0003, 5, "%s MIDI 2"),
+ /* Roland U-8 */
+ EXTERNAL_PORT(0x0582, 0x0004, 0, "%s MIDI"),
+ CONTROL_PORT(0x0582, 0x0004, 1, "%s Control"),
+ /* Roland SC-8820 */
+ SOUNDCANVAS_PORT(0x0582, 0x0007, 0, "%s Part A", 64),
+ SOUNDCANVAS_PORT(0x0582, 0x0007, 1, "%s Part B", 64),
+ EXTERNAL_PORT(0x0582, 0x0007, 2, "%s MIDI"),
+ /* Roland SK-500 */
+ SOUNDCANVAS_PORT(0x0582, 0x000b, 0, "%s Part A", 64),
+ SOUNDCANVAS_PORT(0x0582, 0x000b, 1, "%s Part B", 64),
+ EXTERNAL_PORT(0x0582, 0x000b, 2, "%s MIDI"),
+ /* Roland SC-D70 */
+ SOUNDCANVAS_PORT(0x0582, 0x000c, 0, "%s Part A", 64),
+ SOUNDCANVAS_PORT(0x0582, 0x000c, 1, "%s Part B", 64),
+ EXTERNAL_PORT(0x0582, 0x000c, 2, "%s MIDI"),
+ /* Edirol UM-880 */
+ CONTROL_PORT(0x0582, 0x0014, 8, "%s Control"),
+ /* Edirol SD-90 */
+ ROLAND_SYNTH_PORT(0x0582, 0x0016, 0, "%s Part A", 128),
+ ROLAND_SYNTH_PORT(0x0582, 0x0016, 1, "%s Part B", 128),
+ EXTERNAL_PORT(0x0582, 0x0016, 2, "%s MIDI 1"),
+ EXTERNAL_PORT(0x0582, 0x0016, 3, "%s MIDI 2"),
+ /* Edirol UM-550 */
+ CONTROL_PORT(0x0582, 0x0023, 5, "%s Control"),
+ /* Edirol SD-20 */
+ ROLAND_SYNTH_PORT(0x0582, 0x0027, 0, "%s Part A", 64),
+ ROLAND_SYNTH_PORT(0x0582, 0x0027, 1, "%s Part B", 64),
+ EXTERNAL_PORT(0x0582, 0x0027, 2, "%s MIDI"),
+ /* Edirol SD-80 */
+ ROLAND_SYNTH_PORT(0x0582, 0x0029, 0, "%s Part A", 128),
+ ROLAND_SYNTH_PORT(0x0582, 0x0029, 1, "%s Part B", 128),
+ EXTERNAL_PORT(0x0582, 0x0029, 2, "%s MIDI 1"),
+ EXTERNAL_PORT(0x0582, 0x0029, 3, "%s MIDI 2"),
+ /* Edirol UA-700 */
+ EXTERNAL_PORT(0x0582, 0x002b, 0, "%s MIDI"),
+ CONTROL_PORT(0x0582, 0x002b, 1, "%s Control"),
+ /* Roland VariOS */
+ EXTERNAL_PORT(0x0582, 0x002f, 0, "%s MIDI"),
+ EXTERNAL_PORT(0x0582, 0x002f, 1, "%s External MIDI"),
+ EXTERNAL_PORT(0x0582, 0x002f, 2, "%s Sync"),
+ /* Edirol PCR */
+ EXTERNAL_PORT(0x0582, 0x0033, 0, "%s MIDI"),
+ EXTERNAL_PORT(0x0582, 0x0033, 1, "%s 1"),
+ EXTERNAL_PORT(0x0582, 0x0033, 2, "%s 2"),
+ /* BOSS GS-10 */
+ EXTERNAL_PORT(0x0582, 0x003b, 0, "%s MIDI"),
+ CONTROL_PORT(0x0582, 0x003b, 1, "%s Control"),
+ /* Edirol UA-1000 */
+ EXTERNAL_PORT(0x0582, 0x0044, 0, "%s MIDI"),
+ CONTROL_PORT(0x0582, 0x0044, 1, "%s Control"),
+ /* Edirol UR-80 */
+ EXTERNAL_PORT(0x0582, 0x0048, 0, "%s MIDI"),
+ EXTERNAL_PORT(0x0582, 0x0048, 1, "%s 1"),
+ EXTERNAL_PORT(0x0582, 0x0048, 2, "%s 2"),
+ /* Edirol PCR-A */
+ EXTERNAL_PORT(0x0582, 0x004d, 0, "%s MIDI"),
+ EXTERNAL_PORT(0x0582, 0x004d, 1, "%s 1"),
+ EXTERNAL_PORT(0x0582, 0x004d, 2, "%s 2"),
+ /* BOSS GT-PRO */
+ CONTROL_PORT(0x0582, 0x0089, 0, "%s Control"),
+ /* Edirol UM-3EX */
+ CONTROL_PORT(0x0582, 0x009a, 3, "%s Control"),
+ /* Roland VG-99 */
+ CONTROL_PORT(0x0582, 0x00b2, 0, "%s Control"),
+ EXTERNAL_PORT(0x0582, 0x00b2, 1, "%s MIDI"),
+ /* Cakewalk Sonar V-Studio 100 */
+ EXTERNAL_PORT(0x0582, 0x00eb, 0, "%s MIDI"),
+ CONTROL_PORT(0x0582, 0x00eb, 1, "%s Control"),
+ /* Roland VB-99 */
+ CONTROL_PORT(0x0582, 0x0102, 0, "%s Control"),
+ EXTERNAL_PORT(0x0582, 0x0102, 1, "%s MIDI"),
+ /* Roland A-PRO */
+ EXTERNAL_PORT(0x0582, 0x010f, 0, "%s MIDI"),
+ CONTROL_PORT(0x0582, 0x010f, 1, "%s 1"),
+ CONTROL_PORT(0x0582, 0x010f, 2, "%s 2"),
+ /* Roland SD-50 */
+ ROLAND_SYNTH_PORT(0x0582, 0x0114, 0, "%s Synth", 128),
+ EXTERNAL_PORT(0x0582, 0x0114, 1, "%s MIDI"),
+ CONTROL_PORT(0x0582, 0x0114, 2, "%s Control"),
+ /* Roland OCTA-CAPTURE */
+ EXTERNAL_PORT(0x0582, 0x0120, 0, "%s MIDI"),
+ CONTROL_PORT(0x0582, 0x0120, 1, "%s Control"),
+ EXTERNAL_PORT(0x0582, 0x0121, 0, "%s MIDI"),
+ CONTROL_PORT(0x0582, 0x0121, 1, "%s Control"),
+ /* Roland SPD-SX */
+ CONTROL_PORT(0x0582, 0x0145, 0, "%s Control"),
+ EXTERNAL_PORT(0x0582, 0x0145, 1, "%s MIDI"),
+ /* Roland A-Series */
+ CONTROL_PORT(0x0582, 0x0156, 0, "%s Keyboard"),
+ EXTERNAL_PORT(0x0582, 0x0156, 1, "%s MIDI"),
+ /* Roland INTEGRA-7 */
+ ROLAND_SYNTH_PORT(0x0582, 0x015b, 0, "%s Synth", 128),
+ CONTROL_PORT(0x0582, 0x015b, 1, "%s Control"),
+ /* M-Audio MidiSport 8x8 */
+ CONTROL_PORT(0x0763, 0x1031, 8, "%s Control"),
+ CONTROL_PORT(0x0763, 0x1033, 8, "%s Control"),
+ /* MOTU Fastlane */
+ EXTERNAL_PORT(0x07fd, 0x0001, 0, "%s MIDI A"),
+ EXTERNAL_PORT(0x07fd, 0x0001, 1, "%s MIDI B"),
+ /* Emagic Unitor8/AMT8/MT4 */
+ EXTERNAL_PORT(0x086a, 0x0001, 8, "%s Broadcast"),
+ EXTERNAL_PORT(0x086a, 0x0002, 8, "%s Broadcast"),
+ EXTERNAL_PORT(0x086a, 0x0003, 4, "%s Broadcast"),
+ /* Akai MPD16 */
+ CONTROL_PORT(0x09e8, 0x0062, 0, "%s Control"),
+ PORT_INFO(0x09e8, 0x0062, 1, "%s MIDI", 0,
+ SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
+ SNDRV_SEQ_PORT_TYPE_HARDWARE),
+ /* Access Music Virus TI */
+ EXTERNAL_PORT(0x133e, 0x0815, 0, "%s MIDI"),
+ PORT_INFO(0x133e, 0x0815, 1, "%s Synth", 0,
+ SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
+ SNDRV_SEQ_PORT_TYPE_HARDWARE |
+ SNDRV_SEQ_PORT_TYPE_SYNTHESIZER),
+};
+
+static struct port_info *find_port_info(struct snd_usb_midi *umidi, int number)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_info); ++i) {
+ if (snd_usbmidi_port_info[i].id == umidi->usb_id &&
+ snd_usbmidi_port_info[i].port == number)
+ return &snd_usbmidi_port_info[i];
+ }
+ return NULL;
+}
+
+static void snd_usbmidi_get_port_info(struct snd_rawmidi *rmidi, int number,
+ struct snd_seq_port_info *seq_port_info)
+{
+ struct snd_usb_midi *umidi = rmidi->private_data;
+ struct port_info *port_info;
+
+ /* TODO: read port flags from descriptors */
+ port_info = find_port_info(umidi, number);
+ if (port_info) {
+ seq_port_info->type = port_info->seq_flags;
+ seq_port_info->midi_voices = port_info->voices;
+ }
+}
+
+static void snd_usbmidi_init_substream(struct snd_usb_midi *umidi,
+ int stream, int number,
+ struct snd_rawmidi_substream **rsubstream)
+{
+ struct port_info *port_info;
+ const char *name_format;
+
+ struct snd_rawmidi_substream *substream =
+ snd_usbmidi_find_substream(umidi, stream, number);
+ if (!substream) {
+ dev_err(&umidi->dev->dev, "substream %d:%d not found\n", stream,
+ number);
+ return;
+ }
+
+ /* TODO: read port name from jack descriptor */
+ port_info = find_port_info(umidi, number);
+ name_format = port_info ? port_info->name : "%s MIDI %d";
+ snprintf(substream->name, sizeof(substream->name),
+ name_format, umidi->card->shortname, number + 1);
+
+ *rsubstream = substream;
+}
+
+/*
+ * Creates the endpoints and their ports.
+ */
+static int snd_usbmidi_create_endpoints(struct snd_usb_midi *umidi,
+ struct snd_usb_midi_endpoint_info *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;
+ }
+ }
+ }
+ dev_dbg(&umidi->dev->dev, "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(struct snd_usb_midi *umidi,
+ struct snd_usb_midi_endpoint_info *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 == UAC_HEADER)
+ dev_dbg(&umidi->dev->dev, "MIDIStreaming version %02x.%02x\n",
+ ms_header->bcdMSC[1], ms_header->bcdMSC[0]);
+ else
+ dev_warn(&umidi->dev->dev,
+ "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 (!usb_endpoint_xfer_bulk(ep) && !usb_endpoint_xfer_int(ep))
+ 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 != UAC_MS_GENERAL)
+ continue;
+ if (usb_endpoint_dir_out(ep)) {
+ if (endpoints[epidx].out_ep) {
+ if (++epidx >= MIDI_MAX_ENDPOINTS) {
+ dev_warn(&umidi->dev->dev,
+ "too many endpoints\n");
+ break;
+ }
+ }
+ endpoints[epidx].out_ep = usb_endpoint_num(ep);
+ if (usb_endpoint_xfer_int(ep))
+ endpoints[epidx].out_interval = ep->bInterval;
+ else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
+ /*
+ * Low speed bulk transfers don't exist, so
+ * force interrupt transfers for devices like
+ * ESI MIDI Mate that try to use them anyway.
+ */
+ endpoints[epidx].out_interval = 1;
+ endpoints[epidx].out_cables =
+ (1 << ms_ep->bNumEmbMIDIJack) - 1;
+ dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n",
+ ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
+ } else {
+ if (endpoints[epidx].in_ep) {
+ if (++epidx >= MIDI_MAX_ENDPOINTS) {
+ dev_warn(&umidi->dev->dev,
+ "too many endpoints\n");
+ break;
+ }
+ }
+ endpoints[epidx].in_ep = usb_endpoint_num(ep);
+ if (usb_endpoint_xfer_int(ep))
+ endpoints[epidx].in_interval = ep->bInterval;
+ else if (snd_usb_get_speed(umidi->dev) == USB_SPEED_LOW)
+ endpoints[epidx].in_interval = 1;
+ endpoints[epidx].in_cables =
+ (1 << ms_ep->bNumEmbMIDIJack) - 1;
+ dev_dbg(&umidi->dev->dev, "EP %02X: %d jack(s)\n",
+ ep->bEndpointAddress, ms_ep->bNumEmbMIDIJack);
+ }
+ }
+ return 0;
+}
+
+static int roland_load_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *info)
+{
+ static const char *const names[] = { "High Load", "Light Load" };
+
+ return snd_ctl_enum_info(info, 1, 2, names);
+}
+
+static int roland_load_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *value)
+{
+ value->value.enumerated.item[0] = kcontrol->private_value;
+ return 0;
+}
+
+static int roland_load_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *value)
+{
+ struct snd_usb_midi *umidi = kcontrol->private_data;
+ int changed;
+
+ if (value->value.enumerated.item[0] > 1)
+ return -EINVAL;
+ mutex_lock(&umidi->mutex);
+ changed = value->value.enumerated.item[0] != kcontrol->private_value;
+ if (changed)
+ kcontrol->private_value = value->value.enumerated.item[0];
+ mutex_unlock(&umidi->mutex);
+ return changed;
+}
+
+static struct snd_kcontrol_new roland_load_ctl = {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "MIDI Input Mode",
+ .info = roland_load_info,
+ .get = roland_load_get,
+ .put = roland_load_put,
+ .private_value = 1,
+};
+
+/*
+ * On Roland devices, use the second alternate setting to be able to use
+ * the interrupt input endpoint.
+ */
+static void snd_usbmidi_switch_roland_altsetting(struct snd_usb_midi *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;
+
+ dev_dbg(&umidi->dev->dev, "switching to altsetting %d with int ep\n",
+ intfd->bAlternateSetting);
+ usb_set_interface(umidi->dev, intfd->bInterfaceNumber,
+ intfd->bAlternateSetting);
+
+ umidi->roland_load_ctl = snd_ctl_new1(&roland_load_ctl, umidi);
+ if (snd_ctl_add(umidi->card, umidi->roland_load_ctl) < 0)
+ umidi->roland_load_ctl = NULL;
+}
+
+/*
+ * Try to find any usable endpoints in the interface.
+ */
+static int snd_usbmidi_detect_endpoints(struct snd_usb_midi *umidi,
+ struct snd_usb_midi_endpoint_info *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->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 (!usb_endpoint_xfer_bulk(epd) &&
+ !usb_endpoint_xfer_int(epd))
+ continue;
+ if (out_eps < max_endpoints &&
+ usb_endpoint_dir_out(epd)) {
+ endpoint[out_eps].out_ep = usb_endpoint_num(epd);
+ if (usb_endpoint_xfer_int(epd))
+ endpoint[out_eps].out_interval = epd->bInterval;
+ ++out_eps;
+ }
+ if (in_eps < max_endpoints &&
+ usb_endpoint_dir_in(epd)) {
+ endpoint[in_eps].in_ep = usb_endpoint_num(epd);
+ if (usb_endpoint_xfer_int(epd))
+ 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(struct snd_usb_midi *umidi,
+ struct snd_usb_midi_endpoint_info *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(struct snd_usb_midi *umidi,
+ struct snd_usb_midi_endpoint_info *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] == USB_DT_CS_INTERFACE) {
+ if (cs_desc[2] == UAC_MIDI_IN_JACK)
+ endpoint->in_cables =
+ (endpoint->in_cables << 1) | 1;
+ else if (cs_desc[2] == UAC_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);
+}
+
+/*
+ * Detects the endpoints and ports of Roland devices.
+ */
+static int snd_usbmidi_detect_roland(struct snd_usb_midi *umidi,
+ struct snd_usb_midi_endpoint_info *endpoint)
+{
+ struct usb_interface *intf;
+ struct usb_host_interface *hostif;
+ u8 *cs_desc;
+
+ intf = umidi->iface;
+ if (!intf)
+ return -ENOENT;
+ hostif = intf->altsetting;
+ /*
+ * Some devices have a descriptor <06 24 F1 02 <inputs> <outputs>>,
+ * some have standard class descriptors, or both kinds, or neither.
+ */
+ for (cs_desc = hostif->extra;
+ cs_desc < hostif->extra + hostif->extralen && cs_desc[0] >= 2;
+ cs_desc += cs_desc[0]) {
+ if (cs_desc[0] >= 6 &&
+ cs_desc[1] == USB_DT_CS_INTERFACE &&
+ cs_desc[2] == 0xf1 &&
+ cs_desc[3] == 0x02) {
+ endpoint->in_cables = (1 << cs_desc[4]) - 1;
+ endpoint->out_cables = (1 << cs_desc[5]) - 1;
+ return snd_usbmidi_detect_endpoints(umidi, endpoint, 1);
+ } else if (cs_desc[0] >= 7 &&
+ cs_desc[1] == USB_DT_CS_INTERFACE &&
+ cs_desc[2] == UAC_HEADER) {
+ return snd_usbmidi_get_ms_info(umidi, endpoint);
+ }
+ }
+
+ return -ENODEV;
+}
+
+/*
+ * Creates the endpoints and their ports for Midiman devices.
+ */
+static int snd_usbmidi_create_endpoints_midiman(struct snd_usb_midi *umidi,
+ struct snd_usb_midi_endpoint_info *endpoint)
+{
+ struct snd_usb_midi_endpoint_info 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)) {
+ dev_dbg(&umidi->dev->dev, "not enough endpoints\n");
+ return -ENOENT;
+ }
+
+ epd = get_endpoint(hostif, 0);
+ if (!usb_endpoint_dir_in(epd) || !usb_endpoint_xfer_int(epd)) {
+ dev_dbg(&umidi->dev->dev, "endpoint[0] isn't interrupt\n");
+ return -ENXIO;
+ }
+ epd = get_endpoint(hostif, 2);
+ if (!usb_endpoint_dir_out(epd) || !usb_endpoint_xfer_bulk(epd)) {
+ dev_dbg(&umidi->dev->dev, "endpoint[2] isn't bulk output\n");
+ return -ENXIO;
+ }
+ if (endpoint->out_cables > 0x0001) {
+ epd = get_endpoint(hostif, 4);
+ if (!usb_endpoint_dir_out(epd) ||
+ !usb_endpoint_xfer_bulk(epd)) {
+ dev_dbg(&umidi->dev->dev,
+ "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_interval = 0;
+ 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 struct snd_rawmidi_global_ops snd_usbmidi_ops = {
+ .get_port_info = snd_usbmidi_get_port_info,
+};
+
+static int snd_usbmidi_create_rawmidi(struct snd_usb_midi *umidi,
+ int out_ports, int in_ports)
+{
+ struct snd_rawmidi *rmidi;
+ int err;
+
+ err = snd_rawmidi_new(umidi->card, "USB MIDI",
+ umidi->next_midi_device++,
+ out_ports, in_ports, &rmidi);
+ if (err < 0)
+ return err;
+ strcpy(rmidi->name, umidi->card->shortname);
+ rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
+ SNDRV_RAWMIDI_INFO_INPUT |
+ SNDRV_RAWMIDI_INFO_DUPLEX;
+ rmidi->ops = &snd_usbmidi_ops;
+ 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)
+{
+ struct snd_usb_midi *umidi;
+ unsigned int i, j;
+
+ umidi = list_entry(p, struct snd_usb_midi, list);
+ if (!umidi->input_running)
+ return;
+ for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) {
+ struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i];
+ if (ep->in)
+ for (j = 0; j < INPUT_URBS; ++j)
+ usb_kill_urb(ep->in->urbs[j]);
+ }
+ umidi->input_running = 0;
+}
+EXPORT_SYMBOL(snd_usbmidi_input_stop);
+
+static void snd_usbmidi_input_start_ep(struct snd_usb_midi_in_endpoint *ep)
+{
+ unsigned int i;
+
+ if (!ep)
+ return;
+ for (i = 0; i < INPUT_URBS; ++i) {
+ struct urb *urb = ep->urbs[i];
+ urb->dev = ep->umidi->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)
+{
+ struct snd_usb_midi *umidi;
+ int i;
+
+ umidi = list_entry(p, struct snd_usb_midi, list);
+ if (umidi->input_running || !umidi->opened[1])
+ return;
+ for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i)
+ snd_usbmidi_input_start_ep(umidi->endpoints[i].in);
+ umidi->input_running = 1;
+}
+EXPORT_SYMBOL(snd_usbmidi_input_start);
+
+/*
+ * Prepare for suspend. Typically called from the USB suspend callback.
+ */
+void snd_usbmidi_suspend(struct list_head *p)
+{
+ struct snd_usb_midi *umidi;
+
+ umidi = list_entry(p, struct snd_usb_midi, list);
+ mutex_lock(&umidi->mutex);
+ snd_usbmidi_input_stop(p);
+ mutex_unlock(&umidi->mutex);
+}
+EXPORT_SYMBOL(snd_usbmidi_suspend);
+
+/*
+ * Resume. Typically called from the USB resume callback.
+ */
+void snd_usbmidi_resume(struct list_head *p)
+{
+ struct snd_usb_midi *umidi;
+
+ umidi = list_entry(p, struct snd_usb_midi, list);
+ mutex_lock(&umidi->mutex);
+ snd_usbmidi_input_start(p);
+ mutex_unlock(&umidi->mutex);
+}
+EXPORT_SYMBOL(snd_usbmidi_resume);
+
+/*
+ * Creates and registers everything needed for a MIDI streaming interface.
+ */
+int snd_usbmidi_create(struct snd_card *card,
+ struct usb_interface *iface,
+ struct list_head *midi_list,
+ const struct snd_usb_audio_quirk *quirk)
+{
+ struct snd_usb_midi *umidi;
+ struct snd_usb_midi_endpoint_info endpoints[MIDI_MAX_ENDPOINTS];
+ int out_ports, in_ports;
+ int i, err;
+
+ umidi = kzalloc(sizeof(*umidi), GFP_KERNEL);
+ if (!umidi)
+ return -ENOMEM;
+ umidi->dev = interface_to_usbdev(iface);
+ umidi->card = card;
+ umidi->iface = iface;
+ umidi->quirk = quirk;
+ umidi->usb_protocol_ops = &snd_usbmidi_standard_ops;
+ spin_lock_init(&umidi->disc_lock);
+ init_rwsem(&umidi->disc_rwsem);
+ mutex_init(&umidi->mutex);
+ umidi->usb_id = USB_ID(le16_to_cpu(umidi->dev->descriptor.idVendor),
+ le16_to_cpu(umidi->dev->descriptor.idProduct));
+ setup_timer(&umidi->error_timer, snd_usbmidi_error_timer,
+ (unsigned long)umidi);
+
+ /* detect the endpoint(s) to use */
+ memset(endpoints, 0, sizeof(endpoints));
+ switch (quirk ? quirk->type : QUIRK_MIDI_STANDARD_INTERFACE) {
+ case QUIRK_MIDI_STANDARD_INTERFACE:
+ err = snd_usbmidi_get_ms_info(umidi, endpoints);
+ if (umidi->usb_id == USB_ID(0x0763, 0x0150)) /* M-Audio Uno */
+ umidi->usb_protocol_ops =
+ &snd_usbmidi_maudio_broken_running_status_ops;
+ break;
+ case QUIRK_MIDI_US122L:
+ umidi->usb_protocol_ops = &snd_usbmidi_122l_ops;
+ /* fall through */
+ case QUIRK_MIDI_FIXED_ENDPOINT:
+ memcpy(&endpoints[0], quirk->data,
+ sizeof(struct snd_usb_midi_endpoint_info));
+ 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_ROLAND:
+ err = snd_usbmidi_detect_roland(umidi, &endpoints[0]);
+ break;
+ case QUIRK_MIDI_MIDIMAN:
+ umidi->usb_protocol_ops = &snd_usbmidi_midiman_ops;
+ memcpy(&endpoints[0], quirk->data,
+ sizeof(struct snd_usb_midi_endpoint_info));
+ 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_BYTES:
+ umidi->usb_protocol_ops = &snd_usbmidi_raw_ops;
+ /*
+ * Interface 1 contains isochronous endpoints, but with the same
+ * numbers as in interface 0. Since it is interface 1 that the
+ * USB core has most recently seen, these descriptors are now
+ * associated with the endpoint numbers. This will foul up our
+ * attempts to submit bulk/interrupt URBs to the endpoints in
+ * interface 0, so we have to make sure that the USB core looks
+ * again at interface 0 by calling usb_set_interface() on it.
+ */
+ if (umidi->usb_id == USB_ID(0x07fd, 0x0001)) /* MOTU Fastlane */
+ usb_set_interface(umidi->dev, 0, 0);
+ 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(struct snd_usb_midi_endpoint_info));
+ err = snd_usbmidi_detect_endpoints(umidi, &endpoints[0], 1);
+ break;
+ case QUIRK_MIDI_CME:
+ umidi->usb_protocol_ops = &snd_usbmidi_cme_ops;
+ err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
+ break;
+ case QUIRK_MIDI_AKAI:
+ umidi->usb_protocol_ops = &snd_usbmidi_akai_ops;
+ err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
+ /* endpoint 1 is input-only */
+ endpoints[1].out_cables = 0;
+ break;
+ case QUIRK_MIDI_FTDI:
+ umidi->usb_protocol_ops = &snd_usbmidi_ftdi_ops;
+
+ /* set baud rate to 31250 (48 MHz / 16 / 96) */
+ err = usb_control_msg(umidi->dev, usb_sndctrlpipe(umidi->dev, 0),
+ 3, 0x40, 0x60, 0, NULL, 0, 1000);
+ if (err < 0)
+ break;
+
+ err = snd_usbmidi_detect_per_port_endpoints(umidi, endpoints);
+ break;
+ default:
+ dev_err(&umidi->dev->dev, "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 += hweight16(endpoints[i].out_cables);
+ in_ports += hweight16(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;
+ }
+
+ usb_autopm_get_interface_no_resume(umidi->iface);
+
+ list_add_tail(&umidi->list, midi_list);
+ return 0;
+}
+EXPORT_SYMBOL(snd_usbmidi_create);
Code Review / kvmfornfv.git / blobdiff