diff options
Diffstat (limited to 'sound/usb/line6/driver.c')
| -rw-r--r-- | sound/usb/line6/driver.c | 900 |
1 files changed, 900 insertions, 0 deletions
diff --git a/sound/usb/line6/driver.c b/sound/usb/line6/driver.c new file mode 100644 index 000000000..b67617b68 --- /dev/null +++ b/sound/usb/line6/driver.c @@ -0,0 +1,900 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Line 6 Linux USB driver + * + * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at) + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/export.h> +#include <linux/slab.h> +#include <linux/usb.h> + +#include <sound/core.h> +#include <sound/initval.h> +#include <sound/hwdep.h> + +#include "capture.h" +#include "driver.h" +#include "midi.h" +#include "playback.h" + +#define DRIVER_AUTHOR "Markus Grabner <grabner@icg.tugraz.at>" +#define DRIVER_DESC "Line 6 USB Driver" + +/* + This is Line 6's MIDI manufacturer ID. +*/ +const unsigned char line6_midi_id[3] = { + 0x00, 0x01, 0x0c +}; +EXPORT_SYMBOL_GPL(line6_midi_id); + +/* + Code to request version of POD, Variax interface + (and maybe other devices). +*/ +static const char line6_request_version[] = { + 0xf0, 0x7e, 0x7f, 0x06, 0x01, 0xf7 +}; + +/* + Class for asynchronous messages. +*/ +struct message { + struct usb_line6 *line6; + const char *buffer; + int size; + int done; +}; + +/* + Forward declarations. +*/ +static void line6_data_received(struct urb *urb); +static int line6_send_raw_message_async_part(struct message *msg, + struct urb *urb); + +/* + Start to listen on endpoint. +*/ +static int line6_start_listen(struct usb_line6 *line6) +{ + int err; + + if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) { + usb_fill_int_urb(line6->urb_listen, line6->usbdev, + usb_rcvintpipe(line6->usbdev, line6->properties->ep_ctrl_r), + line6->buffer_listen, LINE6_BUFSIZE_LISTEN, + line6_data_received, line6, line6->interval); + } else { + usb_fill_bulk_urb(line6->urb_listen, line6->usbdev, + usb_rcvbulkpipe(line6->usbdev, line6->properties->ep_ctrl_r), + line6->buffer_listen, LINE6_BUFSIZE_LISTEN, + line6_data_received, line6); + } + + /* sanity checks of EP before actually submitting */ + if (usb_urb_ep_type_check(line6->urb_listen)) { + dev_err(line6->ifcdev, "invalid control EP\n"); + return -EINVAL; + } + + line6->urb_listen->actual_length = 0; + err = usb_submit_urb(line6->urb_listen, GFP_ATOMIC); + return err; +} + +/* + Stop listening on endpoint. +*/ +static void line6_stop_listen(struct usb_line6 *line6) +{ + usb_kill_urb(line6->urb_listen); +} + +/* + Send raw message in pieces of wMaxPacketSize bytes. +*/ +int line6_send_raw_message(struct usb_line6 *line6, const char *buffer, + int size) +{ + int i, done = 0; + const struct line6_properties *properties = line6->properties; + + for (i = 0; i < size; i += line6->max_packet_size) { + int partial; + const char *frag_buf = buffer + i; + int frag_size = min(line6->max_packet_size, size - i); + int retval; + + if (properties->capabilities & LINE6_CAP_CONTROL_MIDI) { + retval = usb_interrupt_msg(line6->usbdev, + usb_sndintpipe(line6->usbdev, properties->ep_ctrl_w), + (char *)frag_buf, frag_size, + &partial, LINE6_TIMEOUT); + } else { + retval = usb_bulk_msg(line6->usbdev, + usb_sndbulkpipe(line6->usbdev, properties->ep_ctrl_w), + (char *)frag_buf, frag_size, + &partial, LINE6_TIMEOUT); + } + + if (retval) { + dev_err(line6->ifcdev, + "usb_bulk_msg failed (%d)\n", retval); + break; + } + + done += frag_size; + } + + return done; +} +EXPORT_SYMBOL_GPL(line6_send_raw_message); + +/* + Notification of completion of asynchronous request transmission. +*/ +static void line6_async_request_sent(struct urb *urb) +{ + struct message *msg = (struct message *)urb->context; + + if (msg->done >= msg->size) { + usb_free_urb(urb); + kfree(msg); + } else + line6_send_raw_message_async_part(msg, urb); +} + +/* + Asynchronously send part of a raw message. +*/ +static int line6_send_raw_message_async_part(struct message *msg, + struct urb *urb) +{ + int retval; + struct usb_line6 *line6 = msg->line6; + int done = msg->done; + int bytes = min(msg->size - done, line6->max_packet_size); + + if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) { + usb_fill_int_urb(urb, line6->usbdev, + usb_sndintpipe(line6->usbdev, line6->properties->ep_ctrl_w), + (char *)msg->buffer + done, bytes, + line6_async_request_sent, msg, line6->interval); + } else { + usb_fill_bulk_urb(urb, line6->usbdev, + usb_sndbulkpipe(line6->usbdev, line6->properties->ep_ctrl_w), + (char *)msg->buffer + done, bytes, + line6_async_request_sent, msg); + } + + msg->done += bytes; + + /* sanity checks of EP before actually submitting */ + retval = usb_urb_ep_type_check(urb); + if (retval < 0) + goto error; + + retval = usb_submit_urb(urb, GFP_ATOMIC); + if (retval < 0) + goto error; + + return 0; + + error: + dev_err(line6->ifcdev, "%s: usb_submit_urb failed (%d)\n", + __func__, retval); + usb_free_urb(urb); + kfree(msg); + return retval; +} + +/* + Asynchronously send raw message. +*/ +int line6_send_raw_message_async(struct usb_line6 *line6, const char *buffer, + int size) +{ + struct message *msg; + struct urb *urb; + + /* create message: */ + msg = kmalloc(sizeof(struct message), GFP_ATOMIC); + if (msg == NULL) + return -ENOMEM; + + /* create URB: */ + urb = usb_alloc_urb(0, GFP_ATOMIC); + + if (urb == NULL) { + kfree(msg); + return -ENOMEM; + } + + /* set message data: */ + msg->line6 = line6; + msg->buffer = buffer; + msg->size = size; + msg->done = 0; + + /* start sending: */ + return line6_send_raw_message_async_part(msg, urb); +} +EXPORT_SYMBOL_GPL(line6_send_raw_message_async); + +/* + Send asynchronous device version request. +*/ +int line6_version_request_async(struct usb_line6 *line6) +{ + char *buffer; + int retval; + + buffer = kmemdup(line6_request_version, + sizeof(line6_request_version), GFP_ATOMIC); + if (buffer == NULL) + return -ENOMEM; + + retval = line6_send_raw_message_async(line6, buffer, + sizeof(line6_request_version)); + kfree(buffer); + return retval; +} +EXPORT_SYMBOL_GPL(line6_version_request_async); + +/* + Send sysex message in pieces of wMaxPacketSize bytes. +*/ +int line6_send_sysex_message(struct usb_line6 *line6, const char *buffer, + int size) +{ + return line6_send_raw_message(line6, buffer, + size + SYSEX_EXTRA_SIZE) - + SYSEX_EXTRA_SIZE; +} +EXPORT_SYMBOL_GPL(line6_send_sysex_message); + +/* + Allocate buffer for sysex message and prepare header. + @param code sysex message code + @param size number of bytes between code and sysex end +*/ +char *line6_alloc_sysex_buffer(struct usb_line6 *line6, int code1, int code2, + int size) +{ + char *buffer = kmalloc(size + SYSEX_EXTRA_SIZE, GFP_ATOMIC); + + if (!buffer) + return NULL; + + buffer[0] = LINE6_SYSEX_BEGIN; + memcpy(buffer + 1, line6_midi_id, sizeof(line6_midi_id)); + buffer[sizeof(line6_midi_id) + 1] = code1; + buffer[sizeof(line6_midi_id) + 2] = code2; + buffer[sizeof(line6_midi_id) + 3 + size] = LINE6_SYSEX_END; + return buffer; +} +EXPORT_SYMBOL_GPL(line6_alloc_sysex_buffer); + +/* + Notification of data received from the Line 6 device. +*/ +static void line6_data_received(struct urb *urb) +{ + struct usb_line6 *line6 = (struct usb_line6 *)urb->context; + struct midi_buffer *mb = &line6->line6midi->midibuf_in; + int done; + + if (urb->status == -ESHUTDOWN) + return; + + if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) { + done = + line6_midibuf_write(mb, urb->transfer_buffer, urb->actual_length); + + if (done < urb->actual_length) { + line6_midibuf_ignore(mb, done); + dev_dbg(line6->ifcdev, "%d %d buffer overflow - message skipped\n", + done, urb->actual_length); + } + + for (;;) { + done = + line6_midibuf_read(mb, line6->buffer_message, + LINE6_MIDI_MESSAGE_MAXLEN, + LINE6_MIDIBUF_READ_RX); + + if (done <= 0) + break; + + line6->message_length = done; + line6_midi_receive(line6, line6->buffer_message, done); + + if (line6->process_message) + line6->process_message(line6); + } + } else { + line6->buffer_message = urb->transfer_buffer; + line6->message_length = urb->actual_length; + if (line6->process_message) + line6->process_message(line6); + line6->buffer_message = NULL; + } + + line6_start_listen(line6); +} + +#define LINE6_READ_WRITE_STATUS_DELAY 2 /* milliseconds */ +#define LINE6_READ_WRITE_MAX_RETRIES 50 + +/* + Read data from device. +*/ +int line6_read_data(struct usb_line6 *line6, unsigned address, void *data, + unsigned datalen) +{ + struct usb_device *usbdev = line6->usbdev; + int ret; + u8 len; + unsigned count; + + if (address > 0xffff || datalen > 0xff) + return -EINVAL; + + /* query the serial number: */ + ret = usb_control_msg_send(usbdev, 0, 0x67, + USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, + (datalen << 8) | 0x21, address, NULL, 0, + LINE6_TIMEOUT, GFP_KERNEL); + if (ret) { + dev_err(line6->ifcdev, "read request failed (error %d)\n", ret); + goto exit; + } + + /* Wait for data length. We'll get 0xff until length arrives. */ + for (count = 0; count < LINE6_READ_WRITE_MAX_RETRIES; count++) { + mdelay(LINE6_READ_WRITE_STATUS_DELAY); + + ret = usb_control_msg_recv(usbdev, 0, 0x67, + USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, + 0x0012, 0x0000, &len, 1, + LINE6_TIMEOUT, GFP_KERNEL); + if (ret) { + dev_err(line6->ifcdev, + "receive length failed (error %d)\n", ret); + goto exit; + } + + if (len != 0xff) + break; + } + + ret = -EIO; + if (len == 0xff) { + dev_err(line6->ifcdev, "read failed after %d retries\n", + count); + goto exit; + } else if (len != datalen) { + /* should be equal or something went wrong */ + dev_err(line6->ifcdev, + "length mismatch (expected %d, got %d)\n", + (int)datalen, len); + goto exit; + } + + /* receive the result: */ + ret = usb_control_msg_recv(usbdev, 0, 0x67, + USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, + 0x0013, 0x0000, data, datalen, LINE6_TIMEOUT, + GFP_KERNEL); + if (ret) + dev_err(line6->ifcdev, "read failed (error %d)\n", ret); + +exit: + return ret; +} +EXPORT_SYMBOL_GPL(line6_read_data); + +/* + Write data to device. +*/ +int line6_write_data(struct usb_line6 *line6, unsigned address, void *data, + unsigned datalen) +{ + struct usb_device *usbdev = line6->usbdev; + int ret; + unsigned char *status; + int count; + + if (address > 0xffff || datalen > 0xffff) + return -EINVAL; + + status = kmalloc(1, GFP_KERNEL); + if (!status) + return -ENOMEM; + + ret = usb_control_msg_send(usbdev, 0, 0x67, + USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, + 0x0022, address, data, datalen, LINE6_TIMEOUT, + GFP_KERNEL); + if (ret) { + dev_err(line6->ifcdev, + "write request failed (error %d)\n", ret); + goto exit; + } + + for (count = 0; count < LINE6_READ_WRITE_MAX_RETRIES; count++) { + mdelay(LINE6_READ_WRITE_STATUS_DELAY); + + ret = usb_control_msg_recv(usbdev, 0, 0x67, + USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, + 0x0012, 0x0000, status, 1, LINE6_TIMEOUT, + GFP_KERNEL); + if (ret) { + dev_err(line6->ifcdev, + "receiving status failed (error %d)\n", ret); + goto exit; + } + + if (*status != 0xff) + break; + } + + if (*status == 0xff) { + dev_err(line6->ifcdev, "write failed after %d retries\n", + count); + ret = -EIO; + } else if (*status != 0) { + dev_err(line6->ifcdev, "write failed (error %d)\n", ret); + ret = -EIO; + } +exit: + kfree(status); + return ret; +} +EXPORT_SYMBOL_GPL(line6_write_data); + +/* + Read Line 6 device serial number. + (POD, TonePort, GuitarPort) +*/ +int line6_read_serial_number(struct usb_line6 *line6, u32 *serial_number) +{ + return line6_read_data(line6, 0x80d0, serial_number, + sizeof(*serial_number)); +} +EXPORT_SYMBOL_GPL(line6_read_serial_number); + +/* + Card destructor. +*/ +static void line6_destruct(struct snd_card *card) +{ + struct usb_line6 *line6 = card->private_data; + struct usb_device *usbdev = line6->usbdev; + + /* Free buffer memory first. We cannot depend on the existence of private + * data from the (podhd) module, it may be gone already during this call + */ + kfree(line6->buffer_message); + + kfree(line6->buffer_listen); + + /* then free URBs: */ + usb_free_urb(line6->urb_listen); + line6->urb_listen = NULL; + + /* decrement reference counters: */ + usb_put_dev(usbdev); +} + +static void line6_get_usb_properties(struct usb_line6 *line6) +{ + struct usb_device *usbdev = line6->usbdev; + const struct line6_properties *properties = line6->properties; + int pipe; + struct usb_host_endpoint *ep = NULL; + + if (properties->capabilities & LINE6_CAP_CONTROL) { + if (properties->capabilities & LINE6_CAP_CONTROL_MIDI) { + pipe = usb_rcvintpipe(line6->usbdev, + line6->properties->ep_ctrl_r); + } else { + pipe = usb_rcvbulkpipe(line6->usbdev, + line6->properties->ep_ctrl_r); + } + ep = usbdev->ep_in[usb_pipeendpoint(pipe)]; + } + + /* Control data transfer properties */ + if (ep) { + line6->interval = ep->desc.bInterval; + line6->max_packet_size = le16_to_cpu(ep->desc.wMaxPacketSize); + } else { + if (properties->capabilities & LINE6_CAP_CONTROL) { + dev_err(line6->ifcdev, + "endpoint not available, using fallback values"); + } + line6->interval = LINE6_FALLBACK_INTERVAL; + line6->max_packet_size = LINE6_FALLBACK_MAXPACKETSIZE; + } + + /* Isochronous transfer properties */ + if (usbdev->speed == USB_SPEED_LOW) { + line6->intervals_per_second = USB_LOW_INTERVALS_PER_SECOND; + line6->iso_buffers = USB_LOW_ISO_BUFFERS; + } else { + line6->intervals_per_second = USB_HIGH_INTERVALS_PER_SECOND; + line6->iso_buffers = USB_HIGH_ISO_BUFFERS; + } +} + +/* Enable buffering of incoming messages, flush the buffer */ +static int line6_hwdep_open(struct snd_hwdep *hw, struct file *file) +{ + struct usb_line6 *line6 = hw->private_data; + + /* NOTE: hwdep layer provides atomicity here */ + + line6->messages.active = 1; + line6->messages.nonblock = file->f_flags & O_NONBLOCK ? 1 : 0; + + return 0; +} + +/* Stop buffering */ +static int line6_hwdep_release(struct snd_hwdep *hw, struct file *file) +{ + struct usb_line6 *line6 = hw->private_data; + + line6->messages.active = 0; + + return 0; +} + +/* Read from circular buffer, return to user */ +static long +line6_hwdep_read(struct snd_hwdep *hwdep, char __user *buf, long count, + loff_t *offset) +{ + struct usb_line6 *line6 = hwdep->private_data; + long rv = 0; + unsigned int out_count; + + if (mutex_lock_interruptible(&line6->messages.read_lock)) + return -ERESTARTSYS; + + while (kfifo_len(&line6->messages.fifo) == 0) { + mutex_unlock(&line6->messages.read_lock); + + if (line6->messages.nonblock) + return -EAGAIN; + + rv = wait_event_interruptible( + line6->messages.wait_queue, + kfifo_len(&line6->messages.fifo) != 0); + if (rv < 0) + return rv; + + if (mutex_lock_interruptible(&line6->messages.read_lock)) + return -ERESTARTSYS; + } + + if (kfifo_peek_len(&line6->messages.fifo) > count) { + /* Buffer too small; allow re-read of the current item... */ + rv = -EINVAL; + } else { + rv = kfifo_to_user(&line6->messages.fifo, buf, count, &out_count); + if (rv == 0) + rv = out_count; + } + + mutex_unlock(&line6->messages.read_lock); + return rv; +} + +/* Write directly (no buffering) to device by user*/ +static long +line6_hwdep_write(struct snd_hwdep *hwdep, const char __user *data, long count, + loff_t *offset) +{ + struct usb_line6 *line6 = hwdep->private_data; + int rv; + char *data_copy; + + if (count > line6->max_packet_size * LINE6_RAW_MESSAGES_MAXCOUNT) { + /* This is an arbitrary limit - still better than nothing... */ + return -EINVAL; + } + + data_copy = memdup_user(data, count); + if (IS_ERR(data_copy)) + return PTR_ERR(data_copy); + + rv = line6_send_raw_message(line6, data_copy, count); + + kfree(data_copy); + return rv; +} + +static __poll_t +line6_hwdep_poll(struct snd_hwdep *hwdep, struct file *file, poll_table *wait) +{ + __poll_t rv; + struct usb_line6 *line6 = hwdep->private_data; + + poll_wait(file, &line6->messages.wait_queue, wait); + + mutex_lock(&line6->messages.read_lock); + rv = kfifo_len(&line6->messages.fifo) == 0 ? 0 : EPOLLIN | EPOLLRDNORM; + mutex_unlock(&line6->messages.read_lock); + + return rv; +} + +static const struct snd_hwdep_ops hwdep_ops = { + .open = line6_hwdep_open, + .release = line6_hwdep_release, + .read = line6_hwdep_read, + .write = line6_hwdep_write, + .poll = line6_hwdep_poll, +}; + +/* Insert into circular buffer */ +static void line6_hwdep_push_message(struct usb_line6 *line6) +{ + if (!line6->messages.active) + return; + + if (kfifo_avail(&line6->messages.fifo) >= line6->message_length) { + /* No race condition here, there's only one writer */ + kfifo_in(&line6->messages.fifo, + line6->buffer_message, line6->message_length); + } /* else TODO: signal overflow */ + + wake_up_interruptible(&line6->messages.wait_queue); +} + +static int line6_hwdep_init(struct usb_line6 *line6) +{ + int err; + struct snd_hwdep *hwdep; + + /* TODO: usb_driver_claim_interface(); */ + line6->process_message = line6_hwdep_push_message; + line6->messages.active = 0; + init_waitqueue_head(&line6->messages.wait_queue); + mutex_init(&line6->messages.read_lock); + INIT_KFIFO(line6->messages.fifo); + + err = snd_hwdep_new(line6->card, "config", 0, &hwdep); + if (err < 0) + goto end; + strcpy(hwdep->name, "config"); + hwdep->iface = SNDRV_HWDEP_IFACE_LINE6; + hwdep->ops = hwdep_ops; + hwdep->private_data = line6; + hwdep->exclusive = true; + +end: + return err; +} + +static int line6_init_cap_control(struct usb_line6 *line6) +{ + int ret; + + /* initialize USB buffers: */ + line6->buffer_listen = kmalloc(LINE6_BUFSIZE_LISTEN, GFP_KERNEL); + if (!line6->buffer_listen) + return -ENOMEM; + + line6->urb_listen = usb_alloc_urb(0, GFP_KERNEL); + if (!line6->urb_listen) + return -ENOMEM; + + if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) { + line6->buffer_message = kmalloc(LINE6_MIDI_MESSAGE_MAXLEN, GFP_KERNEL); + if (!line6->buffer_message) + return -ENOMEM; + + ret = line6_init_midi(line6); + if (ret < 0) + return ret; + } else { + ret = line6_hwdep_init(line6); + if (ret < 0) + return ret; + } + + ret = line6_start_listen(line6); + if (ret < 0) { + dev_err(line6->ifcdev, "cannot start listening: %d\n", ret); + return ret; + } + + return 0; +} + +static void line6_startup_work(struct work_struct *work) +{ + struct usb_line6 *line6 = + container_of(work, struct usb_line6, startup_work.work); + + if (line6->startup) + line6->startup(line6); +} + +/* + Probe USB device. +*/ +int line6_probe(struct usb_interface *interface, + const struct usb_device_id *id, + const char *driver_name, + const struct line6_properties *properties, + int (*private_init)(struct usb_line6 *, const struct usb_device_id *id), + size_t data_size) +{ + struct usb_device *usbdev = interface_to_usbdev(interface); + struct snd_card *card; + struct usb_line6 *line6; + int interface_number; + int ret; + + if (WARN_ON(data_size < sizeof(*line6))) + return -EINVAL; + + /* we don't handle multiple configurations */ + if (usbdev->descriptor.bNumConfigurations != 1) + return -ENODEV; + + ret = snd_card_new(&interface->dev, + SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, + THIS_MODULE, data_size, &card); + if (ret < 0) + return ret; + + /* store basic data: */ + line6 = card->private_data; + line6->card = card; + line6->properties = properties; + line6->usbdev = usbdev; + line6->ifcdev = &interface->dev; + INIT_DELAYED_WORK(&line6->startup_work, line6_startup_work); + + strcpy(card->id, properties->id); + strcpy(card->driver, driver_name); + strcpy(card->shortname, properties->name); + sprintf(card->longname, "Line 6 %s at USB %s", properties->name, + dev_name(line6->ifcdev)); + card->private_free = line6_destruct; + + usb_set_intfdata(interface, line6); + + /* increment reference counters: */ + usb_get_dev(usbdev); + + /* initialize device info: */ + dev_info(&interface->dev, "Line 6 %s found\n", properties->name); + + /* query interface number */ + interface_number = interface->cur_altsetting->desc.bInterfaceNumber; + + /* TODO reserves the bus bandwidth even without actual transfer */ + ret = usb_set_interface(usbdev, interface_number, + properties->altsetting); + if (ret < 0) { + dev_err(&interface->dev, "set_interface failed\n"); + goto error; + } + + line6_get_usb_properties(line6); + + if (properties->capabilities & LINE6_CAP_CONTROL) { + ret = line6_init_cap_control(line6); + if (ret < 0) + goto error; + } + + /* initialize device data based on device: */ + ret = private_init(line6, id); + if (ret < 0) + goto error; + + /* creation of additional special files should go here */ + + dev_info(&interface->dev, "Line 6 %s now attached\n", + properties->name); + + return 0; + + error: + /* we can call disconnect callback here because no close-sync is + * needed yet at this point + */ + line6_disconnect(interface); + return ret; +} +EXPORT_SYMBOL_GPL(line6_probe); + +/* + Line 6 device disconnected. +*/ +void line6_disconnect(struct usb_interface *interface) +{ + struct usb_line6 *line6 = usb_get_intfdata(interface); + struct usb_device *usbdev = interface_to_usbdev(interface); + + if (!line6) + return; + + if (WARN_ON(usbdev != line6->usbdev)) + return; + + cancel_delayed_work_sync(&line6->startup_work); + + if (line6->urb_listen != NULL) + line6_stop_listen(line6); + + snd_card_disconnect(line6->card); + if (line6->line6pcm) + line6_pcm_disconnect(line6->line6pcm); + if (line6->disconnect) + line6->disconnect(line6); + + dev_info(&interface->dev, "Line 6 %s now disconnected\n", + line6->properties->name); + + /* make sure the device isn't destructed twice: */ + usb_set_intfdata(interface, NULL); + + snd_card_free_when_closed(line6->card); +} +EXPORT_SYMBOL_GPL(line6_disconnect); + +#ifdef CONFIG_PM + +/* + Suspend Line 6 device. +*/ +int line6_suspend(struct usb_interface *interface, pm_message_t message) +{ + struct usb_line6 *line6 = usb_get_intfdata(interface); + struct snd_line6_pcm *line6pcm = line6->line6pcm; + + snd_power_change_state(line6->card, SNDRV_CTL_POWER_D3hot); + + if (line6->properties->capabilities & LINE6_CAP_CONTROL) + line6_stop_listen(line6); + + if (line6pcm != NULL) + line6pcm->flags = 0; + + return 0; +} +EXPORT_SYMBOL_GPL(line6_suspend); + +/* + Resume Line 6 device. +*/ +int line6_resume(struct usb_interface *interface) +{ + struct usb_line6 *line6 = usb_get_intfdata(interface); + + if (line6->properties->capabilities & LINE6_CAP_CONTROL) + line6_start_listen(line6); + + snd_power_change_state(line6->card, SNDRV_CTL_POWER_D0); + return 0; +} +EXPORT_SYMBOL_GPL(line6_resume); + +#endif /* CONFIG_PM */ + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); + |