diff options
Diffstat (limited to 'sound/usb/midi.c')
| -rw-r--r-- | sound/usb/midi.c | 2527 |
1 files changed, 2527 insertions, 0 deletions
diff --git a/sound/usb/midi.c b/sound/usb/midi.c new file mode 100644 index 000000000..b02e1a333 --- /dev/null +++ b/sound/usb/midi.c @@ -0,0 +1,2527 @@ +/* + * 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[]; +} __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; + const 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 work_struct work; + 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; + bool in_sysex; + u8 last_cin; + 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(KERN_CONT " %02x", *data); + printk(KERN_CONT " ]\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; + unsigned long flags; + + spin_lock_irqsave(&ep->buffer_lock, flags); + 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_irqrestore(&ep->buffer_lock, flags); + 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_work(struct work_struct *work) +{ + struct snd_usb_midi_out_endpoint *ep = + container_of(work, struct snd_usb_midi_out_endpoint, work); + + snd_usbmidi_do_output(ep); +} + +/* called after transfers had been interrupted due to some USB error */ +static void snd_usbmidi_error_timer(struct timer_list *t) +{ + struct snd_usb_midi *umidi = from_timer(umidi, t, error_timer); + 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); + } +} + +/* + * QinHeng CH345 is buggy: every second packet inside a SysEx has not CIN 4 + * but the previously seen CIN, but still with three data bytes. + */ +static void ch345_broken_sysex_input(struct snd_usb_midi_in_endpoint *ep, + uint8_t *buffer, int buffer_length) +{ + unsigned int i, cin, length; + + for (i = 0; i + 3 < buffer_length; i += 4) { + if (buffer[i] == 0 && i > 0) + break; + cin = buffer[i] & 0x0f; + if (ep->in_sysex && + cin == ep->last_cin && + (buffer[i + 1 + (cin == 0x6)] & 0x80) == 0) + cin = 0x4; +#if 0 + if (buffer[i + 1] == 0x90) { + /* + * Either a corrupted running status or a real note-on + * message; impossible to detect reliably. + */ + } +#endif + length = snd_usbmidi_cin_length[cin]; + snd_usbmidi_input_data(ep, 0, &buffer[i + 1], length); + ep->in_sysex = cin == 0x4; + if (!ep->in_sysex) + ep->last_cin = cin; + } +} + +/* + * 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 const 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 const 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 const +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 const 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, +}; + +static const struct usb_protocol_ops snd_usbmidi_ch345_broken_sysex_ops = { + .input = ch345_broken_sysex_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 const 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 const 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 const 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 const 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: + case USB_SPEED_SUPER_PLUS: + 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 const 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 const 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) + 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) +{ + struct usbmidi_out_port *port = substream->runtime->private_data; + + cancel_work_sync(&port->ep->work); + 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 */ + snd_rawmidi_proceed(substream); + return; + } + queue_work(system_highpri_wq, &port->ep->work); + } +} + +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); + } + port->active = 0; + 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 const 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 const 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; + int err; + + 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]) { + err = -ENOMEM; + goto error; + } + } + 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) { + err = -ENOMEM; + goto error; + } + 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; + err = usb_urb_ep_type_check(ep->urbs[i]); + if (err < 0) { + dev_err(&umidi->dev->dev, "invalid MIDI in EP %x\n", + ep_info->in_ep); + goto error; + } + } + + rep->in = ep; + return 0; + + error: + snd_usbmidi_in_endpoint_delete(ep); + return err; +} + +/* + * 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; + int err; + + 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) { + err = -ENOMEM; + goto error; + } + 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(0x0a67, 0x5011): /* Medeli DD305 */ + 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) { + err = -ENOMEM; + goto error; + } + 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]); + err = usb_urb_ep_type_check(ep->urbs[i].urb); + if (err < 0) { + dev_err(&umidi->dev->dev, "invalid MIDI out EP %x\n", + ep_info->out_ep); + goto error; + } + ep->urbs[i].urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; + } + + spin_lock_init(&ep->buffer_lock); + INIT_WORK(&ep->work, snd_usbmidi_out_work); + 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; + + error: + snd_usbmidi_out_endpoint_delete(ep); + return err; +} + +/* + * 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); + + del_timer_sync(&umidi->error_timer); + + for (i = 0; i < MIDI_MAX_ENDPOINTS; ++i) { + struct snd_usb_midi_endpoint *ep = &umidi->endpoints[i]; + if (ep->out) + cancel_work_sync(&ep->out->work); + 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; + } + } +} +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; +} + +static struct usb_ms_endpoint_descriptor *find_usb_ms_endpoint_descriptor( + struct usb_host_endpoint *hostep) +{ + unsigned char *extra = hostep->extra; + int extralen = hostep->extralen; + + while (extralen > 3) { + struct usb_ms_endpoint_descriptor *ms_ep = + (struct usb_ms_endpoint_descriptor *)extra; + + if (ms_ep->bLength > 3 && + ms_ep->bDescriptorType == USB_DT_CS_ENDPOINT && + ms_ep->bDescriptorSubtype == UAC_MS_GENERAL) + return ms_ep; + if (!extra[0]) + break; + extralen -= extra[0]; + extra += extra[0]; + } + return NULL; +} + +/* + * 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 = find_usb_ms_endpoint_descriptor(hostep); + if (!ms_ep) + continue; + if (ms_ep->bLength <= sizeof(*ms_ep)) + continue; + if (ms_ep->bNumEmbMIDIJack > 0x10) + continue; + if (ms_ep->bLength < sizeof(*ms_ep) + ms_ep->bNumEmbMIDIJack) + 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 const 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 either or both of the endpoints support interrupt transfer, + * then use the alternate setting + */ + if (intfd->bNumEndpoints != 2 || + !((get_endpoint(hostif, 0)->bmAttributes & + USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT || + (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) { + if (cs_desc[4] > 0x10 || cs_desc[5] > 0x10) + continue; + 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 const 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 *umidi, + struct snd_usb_midi_in_endpoint *ep) +{ + unsigned int i; + unsigned long flags; + + if (!ep) + return; + for (i = 0; i < INPUT_URBS; ++i) { + struct urb *urb = ep->urbs[i]; + spin_lock_irqsave(&umidi->disc_lock, flags); + if (!atomic_read(&urb->use_count)) { + urb->dev = ep->umidi->dev; + snd_usbmidi_submit_urb(urb, GFP_ATOMIC); + } + spin_unlock_irqrestore(&umidi->disc_lock, flags); + } +} + +/* + * 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, 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, + unsigned int usb_id) +{ + 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); + if (!usb_id) + usb_id = USB_ID(le16_to_cpu(umidi->dev->descriptor.idVendor), + le16_to_cpu(umidi->dev->descriptor.idProduct)); + umidi->usb_id = usb_id; + timer_setup(&umidi->error_timer, snd_usbmidi_error_timer, 0); + + /* 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; + fallthrough; + 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; + case QUIRK_MIDI_CH345: + umidi->usb_protocol_ops = &snd_usbmidi_ch345_broken_sysex_ops; + 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) + goto free_midi; + + /* 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) + goto free_midi; + + /* 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) + goto exit; + + usb_autopm_get_interface_no_resume(umidi->iface); + + list_add_tail(&umidi->list, midi_list); + return 0; + +free_midi: + kfree(umidi); +exit: + return err; +} +EXPORT_SYMBOL(__snd_usbmidi_create); |