Initial import

1 files changed, 197 insertions, 0 deletions

diff --git a/drivers/usb/gadget/legacy/gmidi.c b/drivers/usb/gadget/legacy/gmidi.c
new file mode 100644
index 000000000..da19c486b
--- /dev/null
+++ b/drivers/usb/gadget/legacy/gmidi.c
@@ -0,0 +1,197 @@
+/*
+ * gmidi.c -- USB MIDI Gadget Driver
+ *
+ * Copyright (C) 2006 Thumtronics Pty Ltd.
+ * Developed for Thumtronics by Grey Innovation
+ * Ben Williamson <ben.williamson@greyinnovation.com>
+ *
+ * This software is distributed under the terms of the GNU General Public
+ * License ("GPL") version 2, as published by the Free Software Foundation.
+ *
+ * This code is based in part on:
+ *
+ * Gadget Zero driver, Copyright (C) 2003-2004 David Brownell.
+ * USB Audio driver, Copyright (C) 2002 by Takashi Iwai.
+ * USB MIDI driver, Copyright (C) 2002-2005 Clemens Ladisch.
+ *
+ * Refer to the USB Device Class Definition for MIDI Devices:
+ * http://www.usb.org/developers/devclass_docs/midi10.pdf
+ */
+
+/* #define VERBOSE_DEBUG */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/device.h>
+
+#include <sound/core.h>
+#include <sound/initval.h>
+#include <sound/rawmidi.h>
+
+#include <linux/usb/ch9.h>
+#include <linux/usb/composite.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/audio.h>
+#include <linux/usb/midi.h>
+
+#include "gadget_chips.h"
+
+#include "u_midi.h"
+
+/*-------------------------------------------------------------------------*/
+
+MODULE_AUTHOR("Ben Williamson");
+MODULE_LICENSE("GPL v2");
+
+static const char shortname[] = "g_midi";
+static const char longname[] = "MIDI Gadget";
+
+USB_GADGET_COMPOSITE_OPTIONS();
+
+static int index = SNDRV_DEFAULT_IDX1;
+module_param(index, int, S_IRUGO);
+MODULE_PARM_DESC(index, "Index value for the USB MIDI Gadget adapter.");
+
+static char *id = SNDRV_DEFAULT_STR1;
+module_param(id, charp, S_IRUGO);
+MODULE_PARM_DESC(id, "ID string for the USB MIDI Gadget adapter.");
+
+static unsigned int buflen = 256;
+module_param(buflen, uint, S_IRUGO);
+MODULE_PARM_DESC(buflen, "MIDI buffer length");
+
+static unsigned int qlen = 32;
+module_param(qlen, uint, S_IRUGO);
+MODULE_PARM_DESC(qlen, "USB read request queue length");
+
+static unsigned int in_ports = 1;
+module_param(in_ports, uint, S_IRUGO);
+MODULE_PARM_DESC(in_ports, "Number of MIDI input ports");
+
+static unsigned int out_ports = 1;
+module_param(out_ports, uint, S_IRUGO);
+MODULE_PARM_DESC(out_ports, "Number of MIDI output ports");
+
+/* Thanks to Grey Innovation for donating this product ID.
+ *
+ * DO NOT REUSE THESE IDs with a protocol-incompatible driver!!  Ever!!
+ * Instead:  allocate your own, using normal USB-IF procedures.
+ */
+#define DRIVER_VENDOR_NUM	0x17b3		/* Grey Innovation */
+#define DRIVER_PRODUCT_NUM	0x0004		/* Linux-USB "MIDI Gadget" */
+
+/* string IDs are assigned dynamically */
+
+#define STRING_DESCRIPTION_IDX		USB_GADGET_FIRST_AVAIL_IDX
+
+static struct usb_device_descriptor device_desc = {
+	.bLength =		USB_DT_DEVICE_SIZE,
+	.bDescriptorType =	USB_DT_DEVICE,
+	.bcdUSB =		__constant_cpu_to_le16(0x0200),
+	.bDeviceClass =		USB_CLASS_PER_INTERFACE,
+	.idVendor =		__constant_cpu_to_le16(DRIVER_VENDOR_NUM),
+	.idProduct =		__constant_cpu_to_le16(DRIVER_PRODUCT_NUM),
+	/* .iManufacturer =	DYNAMIC */
+	/* .iProduct =		DYNAMIC */
+	.bNumConfigurations =	1,
+};
+
+static struct usb_string strings_dev[] = {
+	[USB_GADGET_MANUFACTURER_IDX].s	= "Grey Innovation",
+	[USB_GADGET_PRODUCT_IDX].s	= "MIDI Gadget",
+	[USB_GADGET_SERIAL_IDX].s	= "",
+	[STRING_DESCRIPTION_IDX].s	= "MIDI",
+	{  } /* end of list */
+};
+
+static struct usb_gadget_strings stringtab_dev = {
+	.language	= 0x0409,	/* en-us */
+	.strings	= strings_dev,
+};
+
+static struct usb_gadget_strings *dev_strings[] = {
+	&stringtab_dev,
+	NULL,
+};
+
+static struct usb_function_instance *fi_midi;
+static struct usb_function *f_midi;
+
+static int midi_unbind(struct usb_composite_dev *dev)
+{
+	usb_put_function(f_midi);
+	usb_put_function_instance(fi_midi);
+	return 0;
+}
+
+static struct usb_configuration midi_config = {
+	.label		= "MIDI Gadget",
+	.bConfigurationValue = 1,
+	/* .iConfiguration = DYNAMIC */
+	.bmAttributes	= USB_CONFIG_ATT_ONE,
+	.MaxPower	= CONFIG_USB_GADGET_VBUS_DRAW,
+};
+
+static int midi_bind_config(struct usb_configuration *c)
+{
+	int status;
+
+	f_midi = usb_get_function(fi_midi);
+	if (IS_ERR(f_midi))
+		return PTR_ERR(f_midi);
+
+	status = usb_add_function(c, f_midi);
+	if (status < 0) {
+		usb_put_function(f_midi);
+		return status;
+	}
+
+	return 0;
+}
+
+static int midi_bind(struct usb_composite_dev *cdev)
+{
+	struct f_midi_opts *midi_opts;
+	int status;
+
+	fi_midi = usb_get_function_instance("midi");
+	if (IS_ERR(fi_midi))
+		return PTR_ERR(fi_midi);
+
+	midi_opts = container_of(fi_midi, struct f_midi_opts, func_inst);
+	midi_opts->index = index;
+	midi_opts->id = id;
+	midi_opts->in_ports = in_ports;
+	midi_opts->out_ports = out_ports;
+	midi_opts->buflen = buflen;
+	midi_opts->qlen = qlen;
+
+	status = usb_string_ids_tab(cdev, strings_dev);
+	if (status < 0)
+		goto put;
+	device_desc.iManufacturer = strings_dev[USB_GADGET_MANUFACTURER_IDX].id;
+	device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
+	midi_config.iConfiguration = strings_dev[STRING_DESCRIPTION_IDX].id;
+
+	status = usb_add_config(cdev, &midi_config, midi_bind_config);
+	if (status < 0)
+		goto put;
+	usb_composite_overwrite_options(cdev, &coverwrite);
+	pr_info("%s\n", longname);
+	return 0;
+put:
+	usb_put_function_instance(fi_midi);
+	return status;
+}
+
+static struct usb_composite_driver midi_driver = {
+	.name		= (char *) longname,
+	.dev		= &device_desc,
+	.strings	= dev_strings,
+	.max_speed	= USB_SPEED_HIGH,
+	.bind		= midi_bind,
+	.unbind		= midi_unbind,
+};
+
+module_usb_composite_driver(midi_driver);