Staging: add line6 usb driver
This is an experimental Linux driver for the guitar amp, cab, and
effects modeller PODxt Pro by Line6 (and similar devices), supporting
the following features:
- Reading/writing individual parameters
- Reading/writing complete channel, effects setup, and amp setup data
- Channel switching
- Virtual MIDI interface
- Tuner access
- Playback/capture/mixer device for any ALSA-compatible PCM audio
application
- Signal routing (record clean/processed guitar signal, re-amping)
Moreover, preliminary support for the Variax Workbench is included.
From: Markus Grabner <grabner@icg.tugraz.at>
Cc: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/line6/driver.c b/drivers/staging/line6/driver.c
new file mode 100644
index 0000000..f20efa5
--- /dev/null
+++ b/drivers/staging/line6/driver.c
@@ -0,0 +1,1050 @@
+/*
+ * Line6 Linux USB driver - 0.8.0
+ *
+ * Copyright (C) 2004-2009 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 "driver.h"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+
+#include "audio.h"
+#include "capture.h"
+#include "control.h"
+#include "midi.h"
+#include "playback.h"
+#include "pod.h"
+#include "revision.h"
+#include "toneport.h"
+#include "usbdefs.h"
+#include "variax.h"
+
+
+#define DRIVER_AUTHOR "Markus Grabner <grabner@icg.tugraz.at>"
+#define DRIVER_DESC "Line6 USB Driver"
+#define DRIVER_VERSION "0.8.0"
+
+
+/* table of devices that work with this driver */
+static struct usb_device_id line6_id_table[] = {
+ { USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_BASSPODXT) },
+ { USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_BASSPODXTLIVE) },
+ { USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_BASSPODXTPRO) },
+ { USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_GUITARPORT) },
+ { USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_POCKETPOD) },
+ { USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODX3) },
+ { USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODX3LIVE) },
+ { USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODXT) },
+ { USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODXTLIVE) },
+ { USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_PODXTPRO) },
+ { USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_TONEPORT_GX) },
+ { USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_TONEPORT_UX1) },
+ { USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_TONEPORT_UX2) },
+ { USB_DEVICE(LINE6_VENDOR_ID, LINE6_DEVID_VARIAX) },
+ { },
+};
+MODULE_DEVICE_TABLE (usb, line6_id_table);
+
+static struct line6_properties line6_properties_table[] = {
+ { "BassPODxt", LINE6_BIT_BASSPODXT, LINE6_BIT_CONTROL_PCM },
+ { "BassPODxt Live", LINE6_BIT_BASSPODXTLIVE, LINE6_BIT_CONTROL_PCM },
+ { "BassPODxt Pro", LINE6_BIT_BASSPODXTPRO, LINE6_BIT_CONTROL_PCM },
+ { "GuitarPort", LINE6_BIT_GUITARPORT, LINE6_BIT_PCM },
+ { "Pocket POD", LINE6_BIT_POCKETPOD, LINE6_BIT_CONTROL_PCM },
+ { "POD X3", LINE6_BIT_PODX3, LINE6_BIT_PCM },
+ { "POD X3 Live", LINE6_BIT_PODX3LIVE, LINE6_BIT_PCM },
+ { "PODxt", LINE6_BIT_PODXT, LINE6_BIT_CONTROL_PCM },
+ { "PODxt Live", LINE6_BIT_PODXTLIVE, LINE6_BIT_CONTROL_PCM },
+ { "PODxt Pro", LINE6_BIT_PODXTPRO, LINE6_BIT_CONTROL_PCM },
+ { "TonePort GX", LINE6_BIT_TONEPORT_GX, LINE6_BIT_PCM },
+ { "TonePort UX1", LINE6_BIT_TONEPORT_UX1, LINE6_BIT_PCM },
+ { "TonePort UX2", LINE6_BIT_TONEPORT_UX2, LINE6_BIT_PCM },
+ { "Variax Workbench", LINE6_BIT_VARIAX, LINE6_BIT_CONTROL }
+};
+
+
+/*
+ This is Line6's MIDI manufacturer ID.
+*/
+const unsigned char line6_midi_id[] = { 0x00, 0x01, 0x0c };
+
+struct usb_line6 *line6_devices[LINE6_MAX_DEVICES];
+struct workqueue_struct *line6_workqueue;
+
+
+/**
+ 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 PT_REGS);
+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)
+{
+ usb_fill_int_urb(line6->urb_listen,
+ line6->usbdev,
+ usb_rcvintpipe(line6->usbdev, line6->ep_control_read),
+ line6->buffer_listen, LINE6_BUFSIZE_LISTEN,
+ line6_data_received,
+ line6,
+ line6->interval);
+ line6->urb_listen->actual_length = 0;
+ return usb_submit_urb(line6->urb_listen, GFP_KERNEL);
+}
+
+#if DO_DUMP_ANY
+/*
+ Write hexdump to syslog.
+*/
+void line6_write_hexdump(struct usb_line6 *line6, char dir, const unsigned char *buffer, int size)
+{
+ static const int BYTES_PER_LINE = 8;
+ char hexdump[100];
+ char asc[BYTES_PER_LINE + 1];
+ int i, j;
+
+ for(i = 0; i < size; i += BYTES_PER_LINE) {
+ int hexdumpsize = sizeof(hexdump);
+ char *p = hexdump;
+ int n = min(size - i, BYTES_PER_LINE);
+ asc[n] = 0;
+
+ for(j = 0; j < BYTES_PER_LINE; ++j) {
+ int bytes;
+
+ if(j < n) {
+ unsigned char val = buffer[i + j];
+ bytes = snprintf(p, hexdumpsize, " %02X", val);
+ asc[j] = ((val >= 0x20) && (val < 0x7f)) ? val : '.';
+ }
+ else
+ bytes = snprintf(p, hexdumpsize, " ");
+
+ if(bytes > hexdumpsize)
+ break; /* buffer overflow */
+
+ p += bytes;
+ hexdumpsize -= bytes;
+ }
+
+ dev_info(line6->ifcdev, "%c%04X:%s %s\n", dir, i, hexdump, asc);
+ }
+}
+#endif
+
+#if DO_DUMP_URB_RECEIVE
+/*
+ Dump URB data to syslog.
+*/
+static void line6_dump_urb(struct urb *urb)
+{
+ struct usb_line6 *line6 = (struct usb_line6 *)urb->context;
+
+ if(urb->status < 0)
+ return;
+
+ line6_write_hexdump(line6, 'R', (unsigned char *)urb->transfer_buffer, urb->actual_length);
+}
+#endif
+
+/*
+ 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;
+
+#if DO_DUMP_URB_SEND
+ line6_write_hexdump(line6, 'S', buffer, size);
+#endif
+
+ 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 = usb_interrupt_msg(line6->usbdev,
+ usb_sndintpipe(line6->usbdev, line6->ep_control_write),
+ (char *)frag_buf, frag_size, &partial, LINE6_TIMEOUT * HZ);
+
+ if(retval) {
+ dev_err(line6->ifcdev, "usb_interrupt_msg failed (%d)\n", retval);
+ break;
+ }
+
+ done += frag_size;
+ }
+
+ return done;
+}
+
+/*
+ Notification of completion of asynchronous request transmission.
+*/
+static void line6_async_request_sent(struct urb *urb PT_REGS)
+{
+ 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);
+
+ usb_fill_int_urb(urb,
+ line6->usbdev,
+ usb_sndintpipe(line6->usbdev, line6->ep_control_write),
+ (char *)msg->buffer + done, bytes,
+ line6_async_request_sent, msg, line6->interval);
+
+#if DO_DUMP_URB_SEND
+ line6_write_hexdump(line6, 'S', (char *)msg->buffer + done, bytes);
+#endif
+
+ msg->done += bytes;
+ retval = usb_submit_urb(urb, GFP_ATOMIC);
+
+ if(retval < 0) {
+ dev_err(line6->ifcdev, "line6_send_raw_message_async: usb_submit_urb failed (%d)\n", retval);
+ usb_free_urb(urb);
+ kfree(msg);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/*
+ 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) {
+ dev_err(line6->ifcdev, "Out of memory\n");
+ return -ENOMEM;
+ }
+
+ /* create URB: */
+ urb = usb_alloc_urb(0, GFP_ATOMIC);
+
+ if(urb == NULL) {
+ kfree(msg);
+ dev_err(line6->ifcdev, "Out of memory\n");
+ 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);
+}
+
+/*
+ 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;
+}
+
+/*
+ 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_KERNEL);
+
+ if(!buffer) {
+ dev_err(line6->ifcdev, "out of memory\n");
+ return 0;
+ }
+
+ 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;
+}
+
+/*
+ Notification of data received from the Line6 device.
+*/
+static void line6_data_received(struct urb *urb PT_REGS)
+{
+ struct usb_line6 *line6 = (struct usb_line6 *)urb->context;
+ struct MidiBuffer *mb = &line6->line6midi->midibuf_in;
+ int done;
+
+ if(urb->status == -ESHUTDOWN)
+ return;
+
+#if DO_DUMP_URB_RECEIVE
+ line6_dump_urb(urb);
+#endif
+
+ done = midibuf_write(mb, urb->transfer_buffer, urb->actual_length);
+
+ if(done < urb->actual_length) {
+ midibuf_ignore(mb, done);
+ DEBUG_MESSAGES(dev_err(line6->ifcdev, "%d %d buffer overflow - message skipped\n", done, urb->actual_length));
+ }
+
+ for(;;) {
+ done = midibuf_read(mb, line6->buffer_message, LINE6_MESSAGE_MAXLEN);
+
+ if(done == 0)
+ break;
+
+ /* MIDI input filter */
+ if(midibuf_skip_message(mb, line6->line6midi->midi_mask_receive))
+ continue;
+
+ line6->message_length = done;
+#if DO_DUMP_MIDI_RECEIVE
+ line6_write_hexdump(line6, 'r', line6->buffer_message, done);
+#endif
+ line6_midi_receive(line6, line6->buffer_message, done);
+
+ switch(line6->usbdev->descriptor.idProduct) {
+ case LINE6_DEVID_BASSPODXT:
+ case LINE6_DEVID_BASSPODXTLIVE:
+ case LINE6_DEVID_BASSPODXTPRO:
+ case LINE6_DEVID_PODXT:
+ case LINE6_DEVID_PODXTPRO:
+ case LINE6_DEVID_POCKETPOD:
+ pod_process_message((struct usb_line6_pod *)line6);
+ break;
+
+ case LINE6_DEVID_PODXTLIVE:
+ switch(line6->interface_number) {
+ case PODXTLIVE_INTERFACE_POD:
+ pod_process_message((struct usb_line6_pod *)line6);
+ break;
+
+ case PODXTLIVE_INTERFACE_VARIAX:
+ variax_process_message((struct usb_line6_variax *)line6);
+ break;
+
+ default:
+ dev_err(line6->ifcdev, "PODxt Live interface %d not supported\n", line6->interface_number);
+ }
+ break;
+
+ case LINE6_DEVID_VARIAX:
+ variax_process_message((struct usb_line6_variax *)line6);
+ break;
+
+ default:
+ MISSING_CASE;
+ }
+ }
+
+ line6_start_listen(line6);
+}
+
+/*
+ Send channel number (i.e., switch to a different sound).
+*/
+int line6_send_program(struct usb_line6 *line6, int value)
+{
+ int retval;
+ unsigned char *buffer;
+ unsigned int partial;
+
+ buffer = kmalloc(2, GFP_KERNEL);
+
+ if(!buffer) {
+ dev_err(line6->ifcdev, "out of memory\n");
+ return -ENOMEM;
+ }
+
+ buffer[0] = LINE6_PROGRAM_CHANGE | LINE6_CHANNEL_HOST;
+ buffer[1] = value;
+
+#if DO_DUMP_URB_SEND
+ line6_write_hexdump(line6, 'S', buffer, 2);
+#endif
+
+ retval = usb_interrupt_msg(line6->usbdev,
+ usb_sndintpipe(line6->usbdev, line6->ep_control_write),
+ buffer, 2, &partial, LINE6_TIMEOUT * HZ);
+
+ if(retval)
+ dev_err(line6->ifcdev, "usb_interrupt_msg failed (%d)\n", retval);
+
+ kfree(buffer);
+ return retval;
+}
+
+/*
+ Transmit Line6 control parameter.
+*/
+int line6_transmit_parameter(struct usb_line6 *line6, int param, int value)
+{
+ int retval;
+ unsigned char *buffer;
+ unsigned int partial;
+
+ buffer = kmalloc(3, GFP_KERNEL);
+
+ if(!buffer) {
+ dev_err(line6->ifcdev, "out of memory\n");
+ return -ENOMEM;
+ }
+
+ buffer[0] = LINE6_PARAM_CHANGE | LINE6_CHANNEL_HOST;
+ buffer[1] = param;
+ buffer[2] = value;
+
+#if DO_DUMP_URB_SEND
+ line6_write_hexdump(line6, 'S', buffer, 3);
+#endif
+
+ retval = usb_interrupt_msg(line6->usbdev,
+ usb_sndintpipe(line6->usbdev, line6->ep_control_write),
+ buffer, 3, &partial, LINE6_TIMEOUT * HZ);
+
+ if(retval)
+ dev_err(line6->ifcdev, "usb_interrupt_msg failed (%d)\n", retval);
+
+ kfree(buffer);
+ return retval;
+}
+
+/*
+ Read data from device.
+*/
+int line6_read_data(struct usb_line6 *line6, int address, void *data, size_t datalen)
+{
+ struct usb_device *usbdev = line6->usbdev;
+ int ret;
+ unsigned char len;
+
+ /* query the serial number: */
+ ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
+ (datalen << 8) | 0x21, address, 0, 0, LINE6_TIMEOUT * HZ);
+
+ if(ret < 0) {
+ dev_err(line6->ifcdev, "read request failed (error %d)\n", ret);
+ return ret;
+ }
+
+ /* Wait for data length. We'll get a couple of 0xff until length arrives. */
+ do {
+ ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ 0x0012, 0x0000, &len, 1, LINE6_TIMEOUT * HZ);
+ if(ret < 0) {
+ dev_err(line6->ifcdev, "receive length failed (error %d)\n", ret);
+ return ret;
+ }
+ }
+ while(len == 0xff);
+
+ if(len != datalen) { /* should be equal or something went wrong */
+ dev_err(line6->ifcdev, "length mismatch (expected %d, got %d)\n", (int)datalen, (int)len);
+ return -EINVAL;
+ }
+
+ /* receive the result: */
+ ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ 0x0013, 0x0000, data, datalen, LINE6_TIMEOUT * HZ);
+
+ if(ret < 0) {
+ dev_err(line6->ifcdev, "read failed (error %d)\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+/*
+ Write data to device.
+*/
+int line6_write_data(struct usb_line6 *line6, int address, void *data, size_t datalen)
+{
+ struct usb_device *usbdev = line6->usbdev;
+ int ret;
+ unsigned char status;
+
+ ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev,0), 0x67,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
+ 0x0022, address, data, datalen, LINE6_TIMEOUT * HZ);
+
+ if(ret < 0) {
+ dev_err(line6->ifcdev, "write request failed (error %d)\n", ret);
+ return ret;
+ }
+
+ do {
+ ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev,0), 0x67,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ 0x0012, 0x0000, &status, 1, LINE6_TIMEOUT * HZ);
+
+ if(ret < 0) {
+ dev_err(line6->ifcdev, "receiving status failed (error %d)\n", ret);
+ return ret;
+ }
+ }
+ while(status == 0xff);
+
+ if(status != 0) {
+ dev_err(line6->ifcdev, "write failed (error %d)\n", ret);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/*
+ Read Line6 device serial number.
+ (POD, TonePort, GuitarPort)
+*/
+int line6_read_serial_number(struct usb_line6 *line6, int *serial_number)
+{
+ return line6_read_data(line6, 0x80d0, serial_number, sizeof(*serial_number));
+}
+
+/*
+ No operation (i.e., unsupported).
+*/
+ssize_t line6_nop_read(struct device *dev, DEVICE_ATTRIBUTE char *buf)
+{
+ return 0;
+}
+
+/*
+ No operation (i.e., unsupported).
+*/
+ssize_t line6_nop_write(struct device *dev, DEVICE_ATTRIBUTE const char *buf, size_t count)
+{
+ return count;
+}
+
+/*
+ "write" request on "raw" special file.
+*/
+#if CREATE_RAW_FILE
+ssize_t line6_set_raw(struct device *dev, DEVICE_ATTRIBUTE const char *buf, size_t count)
+{
+ struct usb_interface *interface = to_usb_interface(dev);
+ struct usb_line6 *line6 = usb_get_intfdata(interface);
+ line6_send_raw_message(line6, buf, count);
+ return count;
+}
+#endif
+
+/*
+ Generic destructor.
+*/
+static void line6_destruct(struct usb_interface *interface)
+{
+ struct usb_line6 *line6;
+ if(interface == NULL) return;
+ line6 = usb_get_intfdata(interface);
+ if(line6 == NULL) return;
+
+ /* free buffer memory first: */
+ if(line6->buffer_message != NULL) kfree(line6->buffer_message);
+ if(line6->buffer_listen != NULL) kfree(line6->buffer_listen);
+
+ /* then free URBs: */
+ if(line6->urb_listen != NULL) usb_free_urb(line6->urb_listen);
+
+ /* make sure the device isn't destructed twice: */
+ usb_set_intfdata(interface, NULL);
+
+ /* free interface data: */
+ kfree(line6);
+}
+
+static void line6_list_devices(void)
+{
+ int i;
+
+ for(i = 0; i < LINE6_MAX_DEVICES; ++i) {
+ struct usb_line6 *dev = line6_devices[i];
+ printk(KERN_INFO "Line6 device %d: ", i);
+
+ if(dev == NULL)
+ printk("(not used)\n");
+ else
+ printk("%s:%d\n", dev->properties->name, dev->interface_number);
+ }
+}
+
+/*
+ Probe USB device.
+*/
+static int line6_probe(struct usb_interface *interface, const struct usb_device_id *id)
+{
+ int devtype;
+ struct usb_device *usbdev = 0;
+ struct usb_line6 *line6 = 0;
+ const struct line6_properties *properties;
+ int devnum;
+ int interface_number, alternate = 0;
+ int product;
+ int size = 0;
+ int ep_read = 0, ep_write = 0;
+ int ret;
+
+ if(interface == NULL) return -ENODEV;
+ usbdev = interface_to_usbdev(interface);
+ if(usbdev == NULL) return -ENODEV;
+
+ /* increment reference counters: */
+ usb_get_intf(interface);
+ usb_get_dev(usbdev);
+
+ /* we don't handle multiple configurations */
+ if(usbdev->descriptor.bNumConfigurations != 1)
+ return -ENODEV;
+
+ /* check vendor and product id */
+ for(devtype = sizeof(line6_id_table) / sizeof(line6_id_table[0]) - 1; devtype--;)
+ if((le16_to_cpu(usbdev->descriptor.idVendor) == line6_id_table[devtype].idVendor) &&
+ (le16_to_cpu(usbdev->descriptor.idProduct) == line6_id_table[devtype].idProduct))
+ break;
+
+ if(devtype < 0)
+ return -ENODEV;
+
+ /* find free slot in device table: */
+ for(devnum = 0; devnum < LINE6_MAX_DEVICES; ++devnum)
+ if(line6_devices[devnum] == NULL)
+ break;
+
+ if(devnum == LINE6_MAX_DEVICES)
+ return -ENODEV;
+
+ /* initialize device info: */
+ properties = &line6_properties_table[devtype];
+ dev_info(&interface->dev, "Line6 %s found\n", properties->name);
+ product = le16_to_cpu(usbdev->descriptor.idProduct);
+
+ /* query interface number */
+ interface_number = interface->cur_altsetting->desc.bInterfaceNumber;
+
+ switch(product) {
+ case LINE6_DEVID_BASSPODXTLIVE:
+ case LINE6_DEVID_POCKETPOD:
+ case LINE6_DEVID_PODXTLIVE:
+ case LINE6_DEVID_VARIAX:
+ alternate = 1;
+ break;
+
+ case LINE6_DEVID_PODX3:
+ case LINE6_DEVID_PODX3LIVE:
+ switch(interface_number) {
+ case 0: alternate = 1; break;
+ case 1: alternate = 0; break;
+ default: MISSING_CASE;
+ }
+ break;
+
+ case LINE6_DEVID_BASSPODXT:
+ case LINE6_DEVID_BASSPODXTPRO:
+ case LINE6_DEVID_PODXT:
+ case LINE6_DEVID_PODXTPRO:
+ alternate = 5;
+ break;
+
+ case LINE6_DEVID_TONEPORT_GX:
+ case LINE6_DEVID_GUITARPORT:
+ alternate = 2; // 1..4 seem to be ok
+ break;
+
+ case LINE6_DEVID_TONEPORT_UX1:
+ case LINE6_DEVID_TONEPORT_UX2:
+ switch(interface_number) {
+ case 0: alternate = 2; break; /* defaults to 44.1kHz, 16-bit */
+ case 1: alternate = 0; break;
+ default: MISSING_CASE;
+ }
+ break;
+
+ default:
+ MISSING_CASE;
+ return -ENODEV;
+ }
+
+ if((ret = usb_set_interface(usbdev, interface_number, alternate)) < 0) {
+ dev_err(&interface->dev, "set_interface failed\n");
+ return ret;
+ }
+
+ /* initialize device data based on product id: */
+ switch(product) {
+ case LINE6_DEVID_BASSPODXT:
+ case LINE6_DEVID_BASSPODXTLIVE:
+ case LINE6_DEVID_BASSPODXTPRO:
+ case LINE6_DEVID_POCKETPOD:
+ case LINE6_DEVID_PODXT:
+ case LINE6_DEVID_PODXTPRO:
+ size = sizeof(struct usb_line6_pod);
+ ep_read = 0x84;
+ ep_write = 0x03;
+ break;
+
+ case LINE6_DEVID_PODX3:
+ case LINE6_DEVID_PODX3LIVE:
+ /* currently unused! */
+ size = sizeof(struct usb_line6_pod);
+ ep_read = 0x81;
+ ep_write = 0x01;
+ break;
+
+ case LINE6_DEVID_TONEPORT_GX:
+ case LINE6_DEVID_TONEPORT_UX1:
+ case LINE6_DEVID_TONEPORT_UX2:
+ case LINE6_DEVID_GUITARPORT:
+ size = sizeof(struct usb_line6_toneport);
+ /* these don't have a control channel */
+ break;
+
+ case LINE6_DEVID_PODXTLIVE:
+ switch(interface_number) {
+ case PODXTLIVE_INTERFACE_POD:
+ size = sizeof(struct usb_line6_pod);
+ ep_read = 0x84;
+ ep_write = 0x03;
+ break;
+
+ case PODXTLIVE_INTERFACE_VARIAX:
+ size = sizeof(struct usb_line6_variax);
+ ep_read = 0x86;
+ ep_write = 0x05;
+ break;
+
+ default:
+ return -ENODEV;
+ }
+ break;
+
+ case LINE6_DEVID_VARIAX:
+ size = sizeof(struct usb_line6_variax);
+ ep_read = 0x82;
+ ep_write = 0x01;
+ break;
+
+ default:
+ MISSING_CASE;
+ return -ENODEV;
+ }
+
+ if(size == 0) {
+ dev_err(line6->ifcdev, "driver bug: interface data size not set\n");
+ return -ENODEV;
+ }
+
+ line6 = kzalloc(size, GFP_KERNEL);
+
+ if(line6 == NULL) {
+ dev_err(&interface->dev, "Out of memory\n");
+ return -ENOMEM;
+ }
+
+ /* store basic data: */
+ line6->interface_number = interface_number;
+ line6->properties = properties;
+ line6->usbdev = usbdev;
+ line6->ifcdev = &interface->dev;
+ line6->ep_control_read = ep_read;
+ line6->ep_control_write = ep_write;
+ line6->product = product;
+
+ /* get data from endpoint descriptor (see usb_maxpacket): */
+ {
+ struct usb_host_endpoint *ep;
+ unsigned epnum = usb_pipeendpoint(usb_rcvintpipe(usbdev, ep_read));
+ ep = usbdev->ep_in[epnum];
+
+ if(ep != NULL) {
+ line6->interval = ep->desc.bInterval;
+ line6->max_packet_size = le16_to_cpu(ep->desc.wMaxPacketSize);
+ }
+ else {
+ line6->interval = LINE6_FALLBACK_INTERVAL;
+ line6->max_packet_size = LINE6_FALLBACK_MAXPACKETSIZE;
+ dev_err(line6->ifcdev, "endpoint not available, using fallback values");
+ }
+ }
+
+ usb_set_intfdata(interface, line6);
+
+ if(properties->capabilities & LINE6_BIT_CONTROL) {
+ /* initialize USB buffers: */
+ line6->buffer_listen = kmalloc(LINE6_BUFSIZE_LISTEN, GFP_KERNEL);
+
+ if(line6->buffer_listen == NULL) {
+ dev_err(&interface->dev, "Out of memory\n");
+ line6_destruct(interface);
+ return -ENOMEM;
+ }
+
+ line6->buffer_message = kmalloc(LINE6_MESSAGE_MAXLEN, GFP_KERNEL);
+
+ if(line6->buffer_message == NULL) {
+ dev_err(&interface->dev, "Out of memory\n");
+ line6_destruct(interface);
+ return -ENOMEM;
+ }
+
+ line6->urb_listen = usb_alloc_urb(0, GFP_KERNEL);
+
+ if(line6->urb_listen == NULL) {
+ dev_err(&interface->dev, "Out of memory\n");
+ line6_destruct(interface);
+ return -ENOMEM;
+ }
+
+ if((ret = line6_start_listen(line6)) < 0) {
+ dev_err(&interface->dev, " line6_probe: usb_submit_urb failed\n");
+ line6_destruct(interface);
+ return ret;
+ }
+ }
+
+ /* initialize device data based on product id: */
+ switch(product) {
+ case LINE6_DEVID_BASSPODXT:
+ case LINE6_DEVID_BASSPODXTLIVE:
+ case LINE6_DEVID_BASSPODXTPRO:
+ case LINE6_DEVID_POCKETPOD:
+ case LINE6_DEVID_PODX3:
+ case LINE6_DEVID_PODX3LIVE:
+ case LINE6_DEVID_PODXT:
+ case LINE6_DEVID_PODXTPRO:
+ ret = pod_init(interface, (struct usb_line6_pod *)line6);
+ break;
+
+ case LINE6_DEVID_PODXTLIVE:
+ switch(interface_number) {
+ case PODXTLIVE_INTERFACE_POD:
+ ret = pod_init(interface, (struct usb_line6_pod *)line6);
+ break;
+
+ case PODXTLIVE_INTERFACE_VARIAX:
+ ret = variax_init(interface, (struct usb_line6_variax *)line6);
+ break;
+
+ default:
+ dev_err(&interface->dev, "PODxt Live interface %d not supported\n", interface_number);
+ ret = -ENODEV;
+ }
+
+ break;
+
+ case LINE6_DEVID_VARIAX:
+ ret = variax_init(interface, (struct usb_line6_variax *)line6);
+ break;
+
+ case LINE6_DEVID_TONEPORT_GX:
+ case LINE6_DEVID_TONEPORT_UX1:
+ case LINE6_DEVID_TONEPORT_UX2:
+ case LINE6_DEVID_GUITARPORT:
+ ret = toneport_init(interface, (struct usb_line6_toneport *)line6);
+ break;
+
+ default:
+ MISSING_CASE;
+ ret = -ENODEV;
+ }
+
+ if(ret < 0) {
+ line6_destruct(interface);
+ return ret;
+ }
+
+ if((ret = sysfs_create_link(&interface->dev.kobj, &usbdev->dev.kobj, "usb_device")) < 0) {
+ line6_destruct(interface);
+ return ret;
+ }
+
+ dev_info(&interface->dev, "Line6 %s now attached\n", line6->properties->name);
+ line6_devices[devnum] = line6;
+ line6_list_devices();
+ return ret;
+}
+
+/*
+ Line6 device disconnected.
+*/
+static void line6_disconnect(struct usb_interface *interface)
+{
+ struct usb_line6 *line6;
+ struct usb_device *usbdev;
+ int interface_number, i;
+
+ if(interface == NULL) return;
+ usbdev = interface_to_usbdev(interface);
+ if(usbdev == NULL) return;
+
+ sysfs_remove_link(&interface->dev.kobj, "usb_device");
+
+ interface_number = interface->cur_altsetting->desc.bInterfaceNumber;
+ line6 = usb_get_intfdata(interface);
+
+ if(line6 != NULL) {
+ if(line6->urb_listen != NULL) usb_kill_urb(line6->urb_listen);
+
+ if(usbdev != line6->usbdev)
+ dev_err(line6->ifcdev, "driver bug: inconsistent usb device\n");
+
+ switch(line6->usbdev->descriptor.idProduct) {
+ case LINE6_DEVID_BASSPODXT:
+ case LINE6_DEVID_BASSPODXTLIVE:
+ case LINE6_DEVID_BASSPODXTPRO:
+ case LINE6_DEVID_POCKETPOD:
+ case LINE6_DEVID_PODX3:
+ case LINE6_DEVID_PODX3LIVE:
+ case LINE6_DEVID_PODXT:
+ case LINE6_DEVID_PODXTPRO:
+ pod_disconnect(interface);
+ break;
+
+ case LINE6_DEVID_PODXTLIVE:
+ switch(interface_number) {
+ case PODXTLIVE_INTERFACE_POD:
+ pod_disconnect(interface);
+ break;
+
+ case PODXTLIVE_INTERFACE_VARIAX:
+ variax_disconnect(interface);
+ break;
+ }
+
+ break;
+
+ case LINE6_DEVID_VARIAX:
+ variax_disconnect(interface);
+ break;
+
+ case LINE6_DEVID_TONEPORT_GX:
+ case LINE6_DEVID_TONEPORT_UX1:
+ case LINE6_DEVID_TONEPORT_UX2:
+ case LINE6_DEVID_GUITARPORT:
+ toneport_disconnect(interface);
+ break;
+
+ default:
+ MISSING_CASE;
+ }
+
+ dev_info(&interface->dev, "Line6 %s now disconnected\n", line6->properties->name);
+
+ for(i = LINE6_MAX_DEVICES; i--;)
+ if(line6_devices[i] == line6)
+ line6_devices[i] = 0;
+ }
+
+ line6_destruct(interface);
+
+ /* decrement reference counters: */
+ usb_put_intf(interface);
+ usb_put_dev(usbdev);
+
+ line6_list_devices();
+}
+
+static struct usb_driver line6_driver = {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 16)
+ .owner = THIS_MODULE,
+#endif
+ .name = DRIVER_NAME,
+ .probe = line6_probe,
+ .disconnect = line6_disconnect,
+ .id_table = line6_id_table,
+};
+
+/*
+ Module initialization.
+*/
+static int __init line6_init(void)
+{
+ int i, retval;
+
+ printk("%s driver version %s%s\n", DRIVER_NAME, DRIVER_VERSION, DRIVER_REVISION);
+ line6_workqueue = create_workqueue(DRIVER_NAME);
+
+ if(line6_workqueue == 0) {
+ err("couldn't create workqueue");
+ return -EINVAL;
+ }
+
+ for(i = LINE6_MAX_DEVICES; i--;)
+ line6_devices[i] = 0;
+
+ retval = usb_register(&line6_driver);
+
+ if(retval)
+ err("usb_register failed. Error number %d", retval);
+
+ return retval;
+}
+
+/*
+ Module cleanup.
+*/
+static void __exit line6_exit(void)
+{
+ destroy_workqueue(line6_workqueue);
+ usb_deregister(&line6_driver);
+}
+
+module_init(line6_init);
+module_exit(line6_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRIVER_VERSION);