| /* |
| * Line6 Linux USB driver - 0.9.1beta |
| * |
| * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at) |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation, version 2. |
| * |
| */ |
| |
| #include <linux/slab.h> |
| #include <linux/usb.h> |
| #include <sound/core.h> |
| #include <sound/rawmidi.h> |
| |
| #include "audio.h" |
| #include "driver.h" |
| #include "midi.h" |
| #include "pod.h" |
| #include "usbdefs.h" |
| |
| #define line6_rawmidi_substream_midi(substream) \ |
| ((struct snd_line6_midi *)((substream)->rmidi->private_data)) |
| |
| static int send_midi_async(struct usb_line6 *line6, unsigned char *data, |
| int length); |
| |
| /* |
| Pass data received via USB to MIDI. |
| */ |
| void line6_midi_receive(struct usb_line6 *line6, unsigned char *data, |
| int length) |
| { |
| if (line6->line6midi->substream_receive) |
| snd_rawmidi_receive(line6->line6midi->substream_receive, |
| data, length); |
| } |
| |
| /* |
| Read data from MIDI buffer and transmit them via USB. |
| */ |
| static void line6_midi_transmit(struct snd_rawmidi_substream *substream) |
| { |
| struct usb_line6 *line6 = |
| line6_rawmidi_substream_midi(substream)->line6; |
| struct snd_line6_midi *line6midi = line6->line6midi; |
| struct MidiBuffer *mb = &line6midi->midibuf_out; |
| unsigned long flags; |
| unsigned char chunk[line6->max_packet_size]; |
| int req, done; |
| |
| spin_lock_irqsave(&line6->line6midi->midi_transmit_lock, flags); |
| |
| for (;;) { |
| req = min(line6_midibuf_bytes_free(mb), line6->max_packet_size); |
| done = snd_rawmidi_transmit_peek(substream, chunk, req); |
| |
| if (done == 0) |
| break; |
| |
| #ifdef CONFIG_LINE6_USB_DUMP_MIDI |
| line6_write_hexdump(line6, 's', chunk, done); |
| #endif |
| line6_midibuf_write(mb, chunk, done); |
| snd_rawmidi_transmit_ack(substream, done); |
| } |
| |
| for (;;) { |
| done = line6_midibuf_read(mb, chunk, line6->max_packet_size); |
| |
| if (done == 0) |
| break; |
| |
| if (line6_midibuf_skip_message |
| (mb, line6midi->midi_mask_transmit)) |
| continue; |
| |
| send_midi_async(line6, chunk, done); |
| } |
| |
| spin_unlock_irqrestore(&line6->line6midi->midi_transmit_lock, flags); |
| } |
| |
| /* |
| Notification of completion of MIDI transmission. |
| */ |
| static void midi_sent(struct urb *urb) |
| { |
| unsigned long flags; |
| int status; |
| int num; |
| struct usb_line6 *line6 = (struct usb_line6 *)urb->context; |
| |
| status = urb->status; |
| kfree(urb->transfer_buffer); |
| usb_free_urb(urb); |
| |
| if (status == -ESHUTDOWN) |
| return; |
| |
| spin_lock_irqsave(&line6->line6midi->send_urb_lock, flags); |
| num = --line6->line6midi->num_active_send_urbs; |
| |
| if (num == 0) { |
| line6_midi_transmit(line6->line6midi->substream_transmit); |
| num = line6->line6midi->num_active_send_urbs; |
| } |
| |
| if (num == 0) |
| wake_up(&line6->line6midi->send_wait); |
| |
| spin_unlock_irqrestore(&line6->line6midi->send_urb_lock, flags); |
| } |
| |
| /* |
| Send an asynchronous MIDI message. |
| Assumes that line6->line6midi->send_urb_lock is held |
| (i.e., this function is serialized). |
| */ |
| static int send_midi_async(struct usb_line6 *line6, unsigned char *data, |
| int length) |
| { |
| struct urb *urb; |
| int retval; |
| unsigned char *transfer_buffer; |
| |
| urb = usb_alloc_urb(0, GFP_ATOMIC); |
| |
| if (urb == NULL) { |
| dev_err(line6->ifcdev, "Out of memory\n"); |
| return -ENOMEM; |
| } |
| #ifdef CONFIG_LINE6_USB_DUMP_CTRL |
| line6_write_hexdump(line6, 'S', data, length); |
| #endif |
| |
| transfer_buffer = kmalloc(length, GFP_ATOMIC); |
| |
| if (transfer_buffer == NULL) { |
| usb_free_urb(urb); |
| dev_err(line6->ifcdev, "Out of memory\n"); |
| return -ENOMEM; |
| } |
| |
| memcpy(transfer_buffer, data, length); |
| usb_fill_int_urb(urb, line6->usbdev, |
| usb_sndbulkpipe(line6->usbdev, |
| line6->ep_control_write), |
| transfer_buffer, length, midi_sent, line6, |
| line6->interval); |
| urb->actual_length = 0; |
| retval = usb_submit_urb(urb, GFP_ATOMIC); |
| |
| if (retval < 0) { |
| dev_err(line6->ifcdev, "usb_submit_urb failed\n"); |
| usb_free_urb(urb); |
| return -EINVAL; |
| } |
| |
| ++line6->line6midi->num_active_send_urbs; |
| |
| switch (line6->usbdev->descriptor.idProduct) { |
| case LINE6_DEVID_BASSPODXT: |
| case LINE6_DEVID_BASSPODXTLIVE: |
| case LINE6_DEVID_BASSPODXTPRO: |
| case LINE6_DEVID_PODXT: |
| case LINE6_DEVID_PODXTLIVE: |
| case LINE6_DEVID_PODXTPRO: |
| case LINE6_DEVID_POCKETPOD: |
| line6_pod_midi_postprocess((struct usb_line6_pod *)line6, data, |
| length); |
| break; |
| |
| case LINE6_DEVID_VARIAX: |
| case LINE6_DEVID_PODHD300: |
| break; |
| |
| default: |
| MISSING_CASE; |
| } |
| |
| return 0; |
| } |
| |
| static int line6_midi_output_open(struct snd_rawmidi_substream *substream) |
| { |
| return 0; |
| } |
| |
| static int line6_midi_output_close(struct snd_rawmidi_substream *substream) |
| { |
| return 0; |
| } |
| |
| static void line6_midi_output_trigger(struct snd_rawmidi_substream *substream, |
| int up) |
| { |
| unsigned long flags; |
| struct usb_line6 *line6 = |
| line6_rawmidi_substream_midi(substream)->line6; |
| |
| line6->line6midi->substream_transmit = substream; |
| spin_lock_irqsave(&line6->line6midi->send_urb_lock, flags); |
| |
| if (line6->line6midi->num_active_send_urbs == 0) |
| line6_midi_transmit(substream); |
| |
| spin_unlock_irqrestore(&line6->line6midi->send_urb_lock, flags); |
| } |
| |
| static void line6_midi_output_drain(struct snd_rawmidi_substream *substream) |
| { |
| struct usb_line6 *line6 = |
| line6_rawmidi_substream_midi(substream)->line6; |
| struct snd_line6_midi *midi = line6->line6midi; |
| wait_event_interruptible(midi->send_wait, |
| midi->num_active_send_urbs == 0); |
| } |
| |
| static int line6_midi_input_open(struct snd_rawmidi_substream *substream) |
| { |
| return 0; |
| } |
| |
| static int line6_midi_input_close(struct snd_rawmidi_substream *substream) |
| { |
| return 0; |
| } |
| |
| static void line6_midi_input_trigger(struct snd_rawmidi_substream *substream, |
| int up) |
| { |
| struct usb_line6 *line6 = |
| line6_rawmidi_substream_midi(substream)->line6; |
| |
| if (up) |
| line6->line6midi->substream_receive = substream; |
| else |
| line6->line6midi->substream_receive = 0; |
| } |
| |
| static struct snd_rawmidi_ops line6_midi_output_ops = { |
| .open = line6_midi_output_open, |
| .close = line6_midi_output_close, |
| .trigger = line6_midi_output_trigger, |
| .drain = line6_midi_output_drain, |
| }; |
| |
| static struct snd_rawmidi_ops line6_midi_input_ops = { |
| .open = line6_midi_input_open, |
| .close = line6_midi_input_close, |
| .trigger = line6_midi_input_trigger, |
| }; |
| |
| /* |
| Cleanup the Line6 MIDI device. |
| */ |
| static void line6_cleanup_midi(struct snd_rawmidi *rmidi) |
| { |
| } |
| |
| /* Create a MIDI device */ |
| static int snd_line6_new_midi(struct snd_line6_midi *line6midi) |
| { |
| struct snd_rawmidi *rmidi; |
| int err; |
| |
| err = snd_rawmidi_new(line6midi->line6->card, "Line6 MIDI", 0, 1, 1, |
| &rmidi); |
| if (err < 0) |
| return err; |
| |
| rmidi->private_data = line6midi; |
| rmidi->private_free = line6_cleanup_midi; |
| strcpy(rmidi->id, line6midi->line6->properties->id); |
| strcpy(rmidi->name, line6midi->line6->properties->name); |
| |
| rmidi->info_flags = |
| SNDRV_RAWMIDI_INFO_OUTPUT | |
| SNDRV_RAWMIDI_INFO_INPUT | SNDRV_RAWMIDI_INFO_DUPLEX; |
| |
| snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, |
| &line6_midi_output_ops); |
| snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, |
| &line6_midi_input_ops); |
| return 0; |
| } |
| |
| /* |
| "read" request on "midi_mask_transmit" special file. |
| */ |
| static ssize_t midi_get_midi_mask_transmit(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct usb_interface *interface = to_usb_interface(dev); |
| struct usb_line6 *line6 = usb_get_intfdata(interface); |
| return sprintf(buf, "%d\n", line6->line6midi->midi_mask_transmit); |
| } |
| |
| /* |
| "write" request on "midi_mask" special file. |
| */ |
| static ssize_t midi_set_midi_mask_transmit(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct usb_interface *interface = to_usb_interface(dev); |
| struct usb_line6 *line6 = usb_get_intfdata(interface); |
| unsigned long value; |
| int ret; |
| |
| ret = strict_strtoul(buf, 10, &value); |
| if (ret) |
| return ret; |
| |
| line6->line6midi->midi_mask_transmit = value; |
| return count; |
| } |
| |
| /* |
| "read" request on "midi_mask_receive" special file. |
| */ |
| static ssize_t midi_get_midi_mask_receive(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct usb_interface *interface = to_usb_interface(dev); |
| struct usb_line6 *line6 = usb_get_intfdata(interface); |
| return sprintf(buf, "%d\n", line6->line6midi->midi_mask_receive); |
| } |
| |
| /* |
| "write" request on "midi_mask" special file. |
| */ |
| static ssize_t midi_set_midi_mask_receive(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct usb_interface *interface = to_usb_interface(dev); |
| struct usb_line6 *line6 = usb_get_intfdata(interface); |
| unsigned long value; |
| int ret; |
| |
| ret = strict_strtoul(buf, 10, &value); |
| if (ret) |
| return ret; |
| |
| line6->line6midi->midi_mask_receive = value; |
| return count; |
| } |
| |
| static DEVICE_ATTR(midi_mask_transmit, S_IWUSR | S_IRUGO, |
| midi_get_midi_mask_transmit, midi_set_midi_mask_transmit); |
| static DEVICE_ATTR(midi_mask_receive, S_IWUSR | S_IRUGO, |
| midi_get_midi_mask_receive, midi_set_midi_mask_receive); |
| |
| /* MIDI device destructor */ |
| static int snd_line6_midi_free(struct snd_device *device) |
| { |
| struct snd_line6_midi *line6midi = device->device_data; |
| device_remove_file(line6midi->line6->ifcdev, |
| &dev_attr_midi_mask_transmit); |
| device_remove_file(line6midi->line6->ifcdev, |
| &dev_attr_midi_mask_receive); |
| line6_midibuf_destroy(&line6midi->midibuf_in); |
| line6_midibuf_destroy(&line6midi->midibuf_out); |
| return 0; |
| } |
| |
| /* |
| Initialize the Line6 MIDI subsystem. |
| */ |
| int line6_init_midi(struct usb_line6 *line6) |
| { |
| static struct snd_device_ops midi_ops = { |
| .dev_free = snd_line6_midi_free, |
| }; |
| |
| int err; |
| struct snd_line6_midi *line6midi; |
| |
| if (!(line6->properties->capabilities & LINE6_BIT_CONTROL)) { |
| /* skip MIDI initialization and report success */ |
| return 0; |
| } |
| |
| line6midi = kzalloc(sizeof(struct snd_line6_midi), GFP_KERNEL); |
| |
| if (line6midi == NULL) |
| return -ENOMEM; |
| |
| err = line6_midibuf_init(&line6midi->midibuf_in, MIDI_BUFFER_SIZE, 0); |
| if (err < 0) { |
| kfree(line6midi); |
| return err; |
| } |
| |
| err = line6_midibuf_init(&line6midi->midibuf_out, MIDI_BUFFER_SIZE, 1); |
| if (err < 0) { |
| kfree(line6midi->midibuf_in.buf); |
| kfree(line6midi); |
| return err; |
| } |
| |
| line6midi->line6 = line6; |
| line6midi->midi_mask_transmit = 1; |
| line6midi->midi_mask_receive = 4; |
| line6->line6midi = line6midi; |
| |
| err = snd_device_new(line6->card, SNDRV_DEV_RAWMIDI, line6midi, |
| &midi_ops); |
| if (err < 0) |
| return err; |
| |
| snd_card_set_dev(line6->card, line6->ifcdev); |
| |
| err = snd_line6_new_midi(line6midi); |
| if (err < 0) |
| return err; |
| |
| err = device_create_file(line6->ifcdev, &dev_attr_midi_mask_transmit); |
| if (err < 0) |
| return err; |
| |
| err = device_create_file(line6->ifcdev, &dev_attr_midi_mask_receive); |
| if (err < 0) |
| return err; |
| |
| init_waitqueue_head(&line6midi->send_wait); |
| spin_lock_init(&line6midi->send_urb_lock); |
| spin_lock_init(&line6midi->midi_transmit_lock); |
| return 0; |
| } |