diff options
Diffstat (limited to 'sound/usb/usbmidi.c')
| -rw-r--r-- | sound/usb/usbmidi.c | 1564 |
1 files changed, 1564 insertions, 0 deletions
diff --git a/sound/usb/usbmidi.c b/sound/usb/usbmidi.c new file mode 100644 index 000000000000..5d32857ff955 --- /dev/null +++ b/sound/usb/usbmidi.c @@ -0,0 +1,1564 @@ +/* + * usbmidi.c - ALSA USB MIDI driver + * + * Copyright (c) 2002-2005 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 <sound/driver.h> +#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/usb.h> +#include <sound/core.h> +#include <sound/minors.h> +#include <sound/rawmidi.h> +#include "usbaudio.h" + + +/* + * define this to log all USB packets + */ +/* #define DUMP_PACKETS */ + + +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)); + +typedef struct snd_usb_midi snd_usb_midi_t; +typedef struct snd_usb_midi_endpoint snd_usb_midi_endpoint_t; +typedef struct snd_usb_midi_out_endpoint snd_usb_midi_out_endpoint_t; +typedef struct snd_usb_midi_in_endpoint snd_usb_midi_in_endpoint_t; +typedef struct usbmidi_out_port usbmidi_out_port_t; +typedef struct usbmidi_in_port usbmidi_in_port_t; + +struct usb_protocol_ops { + void (*input)(snd_usb_midi_in_endpoint_t*, uint8_t*, int); + void (*output)(snd_usb_midi_out_endpoint_t*); + void (*output_packet)(struct urb*, uint8_t, uint8_t, uint8_t, uint8_t); + void (*init_out_endpoint)(snd_usb_midi_out_endpoint_t*); + void (*finish_out_endpoint)(snd_usb_midi_out_endpoint_t*); +}; + +struct snd_usb_midi { + snd_usb_audio_t *chip; + struct usb_interface *iface; + const snd_usb_audio_quirk_t *quirk; + snd_rawmidi_t* rmidi; + struct usb_protocol_ops* usb_protocol_ops; + struct list_head list; + + struct snd_usb_midi_endpoint { + snd_usb_midi_out_endpoint_t *out; + snd_usb_midi_in_endpoint_t *in; + } endpoints[MIDI_MAX_ENDPOINTS]; + unsigned long input_triggered; +}; + +struct snd_usb_midi_out_endpoint { + snd_usb_midi_t* umidi; + struct urb* urb; + int urb_active; + int max_transfer; /* size of urb buffer */ + struct tasklet_struct tasklet; + + spinlock_t buffer_lock; + + struct usbmidi_out_port { + snd_usb_midi_out_endpoint_t* ep; + snd_rawmidi_substream_t* 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; +}; + +struct snd_usb_midi_in_endpoint { + snd_usb_midi_t* umidi; + struct urb* urb; + struct usbmidi_in_port { + snd_rawmidi_substream_t* substream; + } ports[0x10]; + int seen_f5; + int current_port; +}; + +static void snd_usbmidi_do_output(snd_usb_midi_out_endpoint_t* 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, int flags) +{ + int err = usb_submit_urb(urb, flags); + if (err < 0 && err != -ENODEV) + snd_printk(KERN_ERR "usb_submit_urb: %d\n", err); + return err; +} + +/* + * Error handling for URB completion functions. + */ +static int snd_usbmidi_urb_error(int status) +{ + if (status == -ENOENT) + return status; /* killed */ + if (status == -EILSEQ || + status == -ECONNRESET || + status == -ETIMEDOUT) + return -ENODEV; /* device removed/shutdown */ + snd_printk(KERN_ERR "urb status %d\n", status); + return 0; /* continue */ +} + +/* + * Receives a chunk of MIDI data. + */ +static void snd_usbmidi_input_data(snd_usb_midi_in_endpoint_t* ep, int portidx, + uint8_t* data, int length) +{ + usbmidi_in_port_t* port = &ep->ports[portidx]; + + if (!port->substream) { + snd_printd("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 pt_regs *regs) +{ + snd_usb_midi_in_endpoint_t* 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 { + if (snd_usbmidi_urb_error(urb->status) < 0) + return; + } + + if (usb_pipe_needs_resubmit(urb->pipe)) { + urb->dev = ep->umidi->chip->dev; + snd_usbmidi_submit_urb(urb, GFP_ATOMIC); + } +} + +static void snd_usbmidi_out_urb_complete(struct urb* urb, struct pt_regs *regs) +{ + snd_usb_midi_out_endpoint_t* ep = urb->context; + + spin_lock(&ep->buffer_lock); + ep->urb_active = 0; + spin_unlock(&ep->buffer_lock); + if (urb->status < 0) { + if (snd_usbmidi_urb_error(urb->status) < 0) + 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(snd_usb_midi_out_endpoint_t* ep) +{ + struct urb* urb = ep->urb; + unsigned long flags; + + spin_lock_irqsave(&ep->buffer_lock, flags); + if (ep->urb_active || ep->umidi->chip->shutdown) { + spin_unlock_irqrestore(&ep->buffer_lock, flags); + return; + } + + urb->transfer_buffer_length = 0; + ep->umidi->usb_protocol_ops->output(ep); + + if (urb->transfer_buffer_length > 0) { + dump_urb("sending", urb->transfer_buffer, + urb->transfer_buffer_length); + urb->dev = ep->umidi->chip->dev; + ep->urb_active = snd_usbmidi_submit_urb(urb, GFP_ATOMIC) >= 0; + } + spin_unlock_irqrestore(&ep->buffer_lock, flags); +} + +static void snd_usbmidi_out_tasklet(unsigned long data) +{ + snd_usb_midi_out_endpoint_t* ep = (snd_usb_midi_out_endpoint_t *) data; + + snd_usbmidi_do_output(ep); +} + +/* helper function to send static data that may not DMA-able */ +static int send_bulk_static_data(snd_usb_midi_out_endpoint_t* ep, + const void *data, int len) +{ + int err; + void *buf = kmalloc(len, GFP_KERNEL); + if (!buf) + return -ENOMEM; + memcpy(buf, data, len); + dump_urb("sending", buf, len); + err = usb_bulk_msg(ep->umidi->chip->dev, ep->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(snd_usb_midi_in_endpoint_t* 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(snd_usb_midi_in_endpoint_t* 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); + } +} + +/* + * 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(usbmidi_out_port_t* 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(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, +}; + +/* + * Mark of the Unicorn USB MIDI protocol: raw MIDI. + */ + +static void snd_usbmidi_motu_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_motu_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_motu_ops = { + .input = snd_usbmidi_motu_input, + .output = snd_usbmidi_motu_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) +{ + /* ignore padding bytes at end of buffer */ + while (buffer_length > 0 && buffer[buffer_length - 1] == 0xff) + --buffer_length; + + /* handle F5 at end of last buffer */ + if (ep->seen_f5) + goto switch_port; + + while (buffer_length > 0) { + int i; + + /* 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; + } + } + 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) { + kfree(ep->urb->transfer_buffer); + 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 = kcalloc(1, 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 = kmalloc(length, GFP_KERNEL); + 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); + + 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->tasklet.func) + tasklet_kill(&ep->tasklet); + if (ep->urb) { + kfree(ep->urb->transfer_buffer); + 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 = kcalloc(1, 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 = kmalloc(ep->max_transfer, GFP_KERNEL); + 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); + + 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, struct usb_driver *driver) +{ + 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->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 { + __u16 vendor; + __u16 product; + int port; + const char *name_format; +} snd_usbmidi_port_names[] = { + /* Roland UA-100 */ + {0x0582, 0x0000, 2, "%s Control"}, + /* Roland SC-8850 */ + {0x0582, 0x0003, 0, "%s Part A"}, + {0x0582, 0x0003, 1, "%s Part B"}, + {0x0582, 0x0003, 2, "%s Part C"}, + {0x0582, 0x0003, 3, "%s Part D"}, + {0x0582, 0x0003, 4, "%s MIDI 1"}, + {0x0582, 0x0003, 5, "%s MIDI 2"}, + /* Roland U-8 */ + {0x0582, 0x0004, 0, "%s MIDI"}, + {0x0582, 0x0004, 1, "%s Control"}, + /* Roland SC-8820 */ + {0x0582, 0x0007, 0, "%s Part A"}, + {0x0582, 0x0007, 1, "%s Part B"}, + {0x0582, 0x0007, 2, "%s MIDI"}, + /* Roland SK-500 */ + {0x0582, 0x000b, 0, "%s Part A"}, + {0x0582, 0x000b, 1, "%s Part B"}, + {0x0582, 0x000b, 2, "%s MIDI"}, + /* Roland SC-D70 */ + {0x0582, 0x000c, 0, "%s Part A"}, + {0x0582, 0x000c, 1, "%s Part B"}, + {0x0582, 0x000c, 2, "%s MIDI"}, + /* Edirol UM-880 */ + {0x0582, 0x0014, 8, "%s Control"}, + /* Edirol SD-90 */ + {0x0582, 0x0016, 0, "%s Part A"}, + {0x0582, 0x0016, 1, "%s Part B"}, + {0x0582, 0x0016, 2, "%s MIDI 1"}, + {0x0582, 0x0016, 3, "%s MIDI 2"}, + /* Edirol UM-550 */ + {0x0582, 0x0023, 5, "%s Control"}, + /* Edirol SD-20 */ + {0x0582, 0x0027, 0, "%s Part A"}, + {0x0582, 0x0027, 1, "%s Part B"}, + {0x0582, 0x0027, 2, "%s MIDI"}, + /* Edirol SD-80 */ + {0x0582, 0x0029, 0, "%s Part A"}, + {0x0582, 0x0029, 1, "%s Part B"}, + {0x0582, 0x0029, 2, "%s MIDI 1"}, + {0x0582, 0x0029, 3, "%s MIDI 2"}, + /* Edirol UA-700 */ + {0x0582, 0x002b, 0, "%s MIDI"}, + {0x0582, 0x002b, 1, "%s Control"}, + /* Roland VariOS */ + {0x0582, 0x002f, 0, "%s MIDI"}, + {0x0582, 0x002f, 1, "%s External MIDI"}, + {0x0582, 0x002f, 2, "%s Sync"}, + /* Edirol PCR */ + {0x0582, 0x0033, 0, "%s MIDI"}, + {0x0582, 0x0033, 1, "%s 1"}, + {0x0582, 0x0033, 2, "%s 2"}, + /* BOSS GS-10 */ + {0x0582, 0x003b, 0, "%s MIDI"}, + {0x0582, 0x003b, 1, "%s Control"}, + /* Edirol UA-1000 */ + {0x0582, 0x0044, 0, "%s MIDI"}, + {0x0582, 0x0044, 1, "%s Control"}, + /* Edirol UR-80 */ + {0x0582, 0x0048, 0, "%s MIDI"}, + {0x0582, 0x0048, 1, "%s 1"}, + {0x0582, 0x0048, 2, "%s 2"}, + /* Edirol PCR-A */ + {0x0582, 0x004d, 0, "%s MIDI"}, + {0x0582, 0x004d, 1, "%s 1"}, + {0x0582, 0x004d, 2, "%s 2"}, + /* M-Audio MidiSport 8x8 */ + {0x0763, 0x1031, 8, "%s Control"}, + {0x0763, 0x1033, 8, "%s Control"}, + /* MOTU Fastlane */ + {0x07fd, 0x0001, 0, "%s MIDI A"}, + {0x07fd, 0x0001, 1, "%s MIDI B"}, + /* Emagic Unitor8/AMT8/MT4 */ + {0x086a, 0x0001, 8, "%s Broadcast"}, + {0x086a, 0x0002, 8, "%s Broadcast"}, + {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; + __u16 vendor, product; + 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"; + vendor = le16_to_cpu(umidi->chip->dev->descriptor.idVendor); + product = le16_to_cpu(umidi->chip->dev->descriptor.idProduct); + for (i = 0; i < ARRAY_SIZE(snd_usbmidi_port_names); ++i) { + if (snd_usbmidi_port_names[i].vendor == vendor && + snd_usbmidi_port_names[i].product == product && + 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 (le16_to_cpu(umidi->chip->dev->descriptor.idVendor) == 0x0582) + snd_usbmidi_switch_roland_altsetting(umidi); + + 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 = kcalloc(1, 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; + + /* 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_MOTU: + umidi->usb_protocol_ops = &snd_usbmidi_motu_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; + 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); |
