usb: gadget: Gadget directory cleanup - group usb functions

The drivers/usb/gadget directory contains many files.
Files which are related can be distributed into separate directories.
This patch moves the USB functions implementations into a separate directory.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 0 insertions, 1247 deletions

diff --git a/drivers/usb/gadget/f_sourcesink.c b/drivers/usb/gadget/f_sourcesink.c
deleted file mode 100644
index d3cd52db78f..00000000000
--- a/drivers/usb/gadget/f_sourcesink.c
+++ /dev/null
@@ -1,1247 +0,0 @@
-/*
- * f_sourcesink.c - USB peripheral source/sink configuration driver
- *
- * Copyright (C) 2003-2008 David Brownell
- * Copyright (C) 2008 by Nokia Corporation
- *
- * 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; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-/* #define VERBOSE_DEBUG */
-
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/device.h>
-#include <linux/module.h>
-#include <linux/usb/composite.h>
-#include <linux/err.h>
-
-#include "g_zero.h"
-#include "gadget_chips.h"
-#include "u_f.h"
-
-/*
- * SOURCE/SINK FUNCTION ... a primary testing vehicle for USB peripheral
- * controller drivers.
- *
- * This just sinks bulk packets OUT to the peripheral and sources them IN
- * to the host, optionally with specific data patterns for integrity tests.
- * As such it supports basic functionality and load tests.
- *
- * In terms of control messaging, this supports all the standard requests
- * plus two that support control-OUT tests.  If the optional "autoresume"
- * mode is enabled, it provides good functional coverage for the "USBCV"
- * test harness from USB-IF.
- *
- * Note that because this doesn't queue more than one request at a time,
- * some other function must be used to test queueing logic.  The network
- * link (g_ether) is the best overall option for that, since its TX and RX
- * queues are relatively independent, will receive a range of packet sizes,
- * and can often be made to run out completely.  Those issues are important
- * when stress testing peripheral controller drivers.
- *
- *
- * This is currently packaged as a configuration driver, which can't be
- * combined with other functions to make composite devices.  However, it
- * can be combined with other independent configurations.
- */
-struct f_sourcesink {
-	struct usb_function	function;
-
-	struct usb_ep		*in_ep;
-	struct usb_ep		*out_ep;
-	struct usb_ep		*iso_in_ep;
-	struct usb_ep		*iso_out_ep;
-	int			cur_alt;
-};
-
-static inline struct f_sourcesink *func_to_ss(struct usb_function *f)
-{
-	return container_of(f, struct f_sourcesink, function);
-}
-
-static unsigned pattern;
-static unsigned isoc_interval;
-static unsigned isoc_maxpacket;
-static unsigned isoc_mult;
-static unsigned isoc_maxburst;
-static unsigned buflen;
-
-/*-------------------------------------------------------------------------*/
-
-static struct usb_interface_descriptor source_sink_intf_alt0 = {
-	.bLength =		USB_DT_INTERFACE_SIZE,
-	.bDescriptorType =	USB_DT_INTERFACE,
-
-	.bAlternateSetting =	0,
-	.bNumEndpoints =	2,
-	.bInterfaceClass =	USB_CLASS_VENDOR_SPEC,
-	/* .iInterface		= DYNAMIC */
-};
-
-static struct usb_interface_descriptor source_sink_intf_alt1 = {
-	.bLength =		USB_DT_INTERFACE_SIZE,
-	.bDescriptorType =	USB_DT_INTERFACE,
-
-	.bAlternateSetting =	1,
-	.bNumEndpoints =	4,
-	.bInterfaceClass =	USB_CLASS_VENDOR_SPEC,
-	/* .iInterface		= DYNAMIC */
-};
-
-/* full speed support: */
-
-static struct usb_endpoint_descriptor fs_source_desc = {
-	.bLength =		USB_DT_ENDPOINT_SIZE,
-	.bDescriptorType =	USB_DT_ENDPOINT,
-
-	.bEndpointAddress =	USB_DIR_IN,
-	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_endpoint_descriptor fs_sink_desc = {
-	.bLength =		USB_DT_ENDPOINT_SIZE,
-	.bDescriptorType =	USB_DT_ENDPOINT,
-
-	.bEndpointAddress =	USB_DIR_OUT,
-	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_endpoint_descriptor fs_iso_source_desc = {
-	.bLength =		USB_DT_ENDPOINT_SIZE,
-	.bDescriptorType =	USB_DT_ENDPOINT,
-
-	.bEndpointAddress =	USB_DIR_IN,
-	.bmAttributes =		USB_ENDPOINT_XFER_ISOC,
-	.wMaxPacketSize =	cpu_to_le16(1023),
-	.bInterval =		4,
-};
-
-static struct usb_endpoint_descriptor fs_iso_sink_desc = {
-	.bLength =		USB_DT_ENDPOINT_SIZE,
-	.bDescriptorType =	USB_DT_ENDPOINT,
-
-	.bEndpointAddress =	USB_DIR_OUT,
-	.bmAttributes =		USB_ENDPOINT_XFER_ISOC,
-	.wMaxPacketSize =	cpu_to_le16(1023),
-	.bInterval =		4,
-};
-
-static struct usb_descriptor_header *fs_source_sink_descs[] = {
-	(struct usb_descriptor_header *) &source_sink_intf_alt0,
-	(struct usb_descriptor_header *) &fs_sink_desc,
-	(struct usb_descriptor_header *) &fs_source_desc,
-	(struct usb_descriptor_header *) &source_sink_intf_alt1,
-#define FS_ALT_IFC_1_OFFSET	3
-	(struct usb_descriptor_header *) &fs_sink_desc,
-	(struct usb_descriptor_header *) &fs_source_desc,
-	(struct usb_descriptor_header *) &fs_iso_sink_desc,
-	(struct usb_descriptor_header *) &fs_iso_source_desc,
-	NULL,
-};
-
-/* high speed support: */
-
-static struct usb_endpoint_descriptor hs_source_desc = {
-	.bLength =		USB_DT_ENDPOINT_SIZE,
-	.bDescriptorType =	USB_DT_ENDPOINT,
-
-	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
-	.wMaxPacketSize =	cpu_to_le16(512),
-};
-
-static struct usb_endpoint_descriptor hs_sink_desc = {
-	.bLength =		USB_DT_ENDPOINT_SIZE,
-	.bDescriptorType =	USB_DT_ENDPOINT,
-
-	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
-	.wMaxPacketSize =	cpu_to_le16(512),
-};
-
-static struct usb_endpoint_descriptor hs_iso_source_desc = {
-	.bLength =		USB_DT_ENDPOINT_SIZE,
-	.bDescriptorType =	USB_DT_ENDPOINT,
-
-	.bmAttributes =		USB_ENDPOINT_XFER_ISOC,
-	.wMaxPacketSize =	cpu_to_le16(1024),
-	.bInterval =		4,
-};
-
-static struct usb_endpoint_descriptor hs_iso_sink_desc = {
-	.bLength =		USB_DT_ENDPOINT_SIZE,
-	.bDescriptorType =	USB_DT_ENDPOINT,
-
-	.bmAttributes =		USB_ENDPOINT_XFER_ISOC,
-	.wMaxPacketSize =	cpu_to_le16(1024),
-	.bInterval =		4,
-};
-
-static struct usb_descriptor_header *hs_source_sink_descs[] = {
-	(struct usb_descriptor_header *) &source_sink_intf_alt0,
-	(struct usb_descriptor_header *) &hs_source_desc,
-	(struct usb_descriptor_header *) &hs_sink_desc,
-	(struct usb_descriptor_header *) &source_sink_intf_alt1,
-#define HS_ALT_IFC_1_OFFSET	3
-	(struct usb_descriptor_header *) &hs_source_desc,
-	(struct usb_descriptor_header *) &hs_sink_desc,
-	(struct usb_descriptor_header *) &hs_iso_source_desc,
-	(struct usb_descriptor_header *) &hs_iso_sink_desc,
-	NULL,
-};
-
-/* super speed support: */
-
-static struct usb_endpoint_descriptor ss_source_desc = {
-	.bLength =		USB_DT_ENDPOINT_SIZE,
-	.bDescriptorType =	USB_DT_ENDPOINT,
-
-	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
-	.wMaxPacketSize =	cpu_to_le16(1024),
-};
-
-static struct usb_ss_ep_comp_descriptor ss_source_comp_desc = {
-	.bLength =		USB_DT_SS_EP_COMP_SIZE,
-	.bDescriptorType =	USB_DT_SS_ENDPOINT_COMP,
-
-	.bMaxBurst =		0,
-	.bmAttributes =		0,
-	.wBytesPerInterval =	0,
-};
-
-static struct usb_endpoint_descriptor ss_sink_desc = {
-	.bLength =		USB_DT_ENDPOINT_SIZE,
-	.bDescriptorType =	USB_DT_ENDPOINT,
-
-	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
-	.wMaxPacketSize =	cpu_to_le16(1024),
-};
-
-static struct usb_ss_ep_comp_descriptor ss_sink_comp_desc = {
-	.bLength =		USB_DT_SS_EP_COMP_SIZE,
-	.bDescriptorType =	USB_DT_SS_ENDPOINT_COMP,
-
-	.bMaxBurst =		0,
-	.bmAttributes =		0,
-	.wBytesPerInterval =	0,
-};
-
-static struct usb_endpoint_descriptor ss_iso_source_desc = {
-	.bLength =		USB_DT_ENDPOINT_SIZE,
-	.bDescriptorType =	USB_DT_ENDPOINT,
-
-	.bmAttributes =		USB_ENDPOINT_XFER_ISOC,
-	.wMaxPacketSize =	cpu_to_le16(1024),
-	.bInterval =		4,
-};
-
-static struct usb_ss_ep_comp_descriptor ss_iso_source_comp_desc = {
-	.bLength =		USB_DT_SS_EP_COMP_SIZE,
-	.bDescriptorType =	USB_DT_SS_ENDPOINT_COMP,
-
-	.bMaxBurst =		0,
-	.bmAttributes =		0,
-	.wBytesPerInterval =	cpu_to_le16(1024),
-};
-
-static struct usb_endpoint_descriptor ss_iso_sink_desc = {
-	.bLength =		USB_DT_ENDPOINT_SIZE,
-	.bDescriptorType =	USB_DT_ENDPOINT,
-
-	.bmAttributes =		USB_ENDPOINT_XFER_ISOC,
-	.wMaxPacketSize =	cpu_to_le16(1024),
-	.bInterval =		4,
-};
-
-static struct usb_ss_ep_comp_descriptor ss_iso_sink_comp_desc = {
-	.bLength =		USB_DT_SS_EP_COMP_SIZE,
-	.bDescriptorType =	USB_DT_SS_ENDPOINT_COMP,
-
-	.bMaxBurst =		0,
-	.bmAttributes =		0,
-	.wBytesPerInterval =	cpu_to_le16(1024),
-};
-
-static struct usb_descriptor_header *ss_source_sink_descs[] = {
-	(struct usb_descriptor_header *) &source_sink_intf_alt0,
-	(struct usb_descriptor_header *) &ss_source_desc,
-	(struct usb_descriptor_header *) &ss_source_comp_desc,
-	(struct usb_descriptor_header *) &ss_sink_desc,
-	(struct usb_descriptor_header *) &ss_sink_comp_desc,
-	(struct usb_descriptor_header *) &source_sink_intf_alt1,
-#define SS_ALT_IFC_1_OFFSET	5
-	(struct usb_descriptor_header *) &ss_source_desc,
-	(struct usb_descriptor_header *) &ss_source_comp_desc,
-	(struct usb_descriptor_header *) &ss_sink_desc,
-	(struct usb_descriptor_header *) &ss_sink_comp_desc,
-	(struct usb_descriptor_header *) &ss_iso_source_desc,
-	(struct usb_descriptor_header *) &ss_iso_source_comp_desc,
-	(struct usb_descriptor_header *) &ss_iso_sink_desc,
-	(struct usb_descriptor_header *) &ss_iso_sink_comp_desc,
-	NULL,
-};
-
-/* function-specific strings: */
-
-static struct usb_string strings_sourcesink[] = {
-	[0].s = "source and sink data",
-	{  }			/* end of list */
-};
-
-static struct usb_gadget_strings stringtab_sourcesink = {
-	.language	= 0x0409,	/* en-us */
-	.strings	= strings_sourcesink,
-};
-
-static struct usb_gadget_strings *sourcesink_strings[] = {
-	&stringtab_sourcesink,
-	NULL,
-};
-
-/*-------------------------------------------------------------------------*/
-
-static inline struct usb_request *ss_alloc_ep_req(struct usb_ep *ep, int len)
-{
-	return alloc_ep_req(ep, len, buflen);
-}
-
-void free_ep_req(struct usb_ep *ep, struct usb_request *req)
-{
-	kfree(req->buf);
-	usb_ep_free_request(ep, req);
-}
-
-static void disable_ep(struct usb_composite_dev *cdev, struct usb_ep *ep)
-{
-	int			value;
-
-	if (ep->driver_data) {
-		value = usb_ep_disable(ep);
-		if (value < 0)
-			DBG(cdev, "disable %s --> %d\n",
-					ep->name, value);
-		ep->driver_data = NULL;
-	}
-}
-
-void disable_endpoints(struct usb_composite_dev *cdev,
-		struct usb_ep *in, struct usb_ep *out,
-		struct usb_ep *iso_in, struct usb_ep *iso_out)
-{
-	disable_ep(cdev, in);
-	disable_ep(cdev, out);
-	if (iso_in)
-		disable_ep(cdev, iso_in);
-	if (iso_out)
-		disable_ep(cdev, iso_out);
-}
-
-static int
-sourcesink_bind(struct usb_configuration *c, struct usb_function *f)
-{
-	struct usb_composite_dev *cdev = c->cdev;
-	struct f_sourcesink	*ss = func_to_ss(f);
-	int	id;
-	int ret;
-
-	/* allocate interface ID(s) */
-	id = usb_interface_id(c, f);
-	if (id < 0)
-		return id;
-	source_sink_intf_alt0.bInterfaceNumber = id;
-	source_sink_intf_alt1.bInterfaceNumber = id;
-
-	/* allocate bulk endpoints */
-	ss->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_source_desc);
-	if (!ss->in_ep) {
-autoconf_fail:
-		ERROR(cdev, "%s: can't autoconfigure on %s\n",
-			f->name, cdev->gadget->name);
-		return -ENODEV;
-	}
-	ss->in_ep->driver_data = cdev;	/* claim */
-
-	ss->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_sink_desc);
-	if (!ss->out_ep)
-		goto autoconf_fail;
-	ss->out_ep->driver_data = cdev;	/* claim */
-
-	/* sanity check the isoc module parameters */
-	if (isoc_interval < 1)
-		isoc_interval = 1;
-	if (isoc_interval > 16)
-		isoc_interval = 16;
-	if (isoc_mult > 2)
-		isoc_mult = 2;
-	if (isoc_maxburst > 15)
-		isoc_maxburst = 15;
-
-	/* fill in the FS isoc descriptors from the module parameters */
-	fs_iso_source_desc.wMaxPacketSize = isoc_maxpacket > 1023 ?
-						1023 : isoc_maxpacket;
-	fs_iso_source_desc.bInterval = isoc_interval;
-	fs_iso_sink_desc.wMaxPacketSize = isoc_maxpacket > 1023 ?
-						1023 : isoc_maxpacket;
-	fs_iso_sink_desc.bInterval = isoc_interval;
-
-	/* allocate iso endpoints */
-	ss->iso_in_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_source_desc);
-	if (!ss->iso_in_ep)
-		goto no_iso;
-	ss->iso_in_ep->driver_data = cdev;	/* claim */
-
-	ss->iso_out_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_sink_desc);
-	if (ss->iso_out_ep) {
-		ss->iso_out_ep->driver_data = cdev;	/* claim */
-	} else {
-		ss->iso_in_ep->driver_data = NULL;
-		ss->iso_in_ep = NULL;
-no_iso:
-		/*
-		 * We still want to work even if the UDC doesn't have isoc
-		 * endpoints, so null out the alt interface that contains
-		 * them and continue.
-		 */
-		fs_source_sink_descs[FS_ALT_IFC_1_OFFSET] = NULL;
-		hs_source_sink_descs[HS_ALT_IFC_1_OFFSET] = NULL;
-		ss_source_sink_descs[SS_ALT_IFC_1_OFFSET] = NULL;
-	}
-
-	if (isoc_maxpacket > 1024)
-		isoc_maxpacket = 1024;
-
-	/* support high speed hardware */
-	hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress;
-	hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress;
-
-	/*
-	 * Fill in the HS isoc descriptors from the module parameters.
-	 * We assume that the user knows what they are doing and won't
-	 * give parameters that their UDC doesn't support.
-	 */
-	hs_iso_source_desc.wMaxPacketSize = isoc_maxpacket;
-	hs_iso_source_desc.wMaxPacketSize |= isoc_mult << 11;
-	hs_iso_source_desc.bInterval = isoc_interval;
-	hs_iso_source_desc.bEndpointAddress =
-		fs_iso_source_desc.bEndpointAddress;
-
-	hs_iso_sink_desc.wMaxPacketSize = isoc_maxpacket;
-	hs_iso_sink_desc.wMaxPacketSize |= isoc_mult << 11;
-	hs_iso_sink_desc.bInterval = isoc_interval;
-	hs_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
-
-	/* support super speed hardware */
-	ss_source_desc.bEndpointAddress =
-		fs_source_desc.bEndpointAddress;
-	ss_sink_desc.bEndpointAddress =
-		fs_sink_desc.bEndpointAddress;
-
-	/*
-	 * Fill in the SS isoc descriptors from the module parameters.
-	 * We assume that the user knows what they are doing and won't
-	 * give parameters that their UDC doesn't support.
-	 */
-	ss_iso_source_desc.wMaxPacketSize = isoc_maxpacket;
-	ss_iso_source_desc.bInterval = isoc_interval;
-	ss_iso_source_comp_desc.bmAttributes = isoc_mult;
-	ss_iso_source_comp_desc.bMaxBurst = isoc_maxburst;
-	ss_iso_source_comp_desc.wBytesPerInterval =
-		isoc_maxpacket * (isoc_mult + 1) * (isoc_maxburst + 1);
-	ss_iso_source_desc.bEndpointAddress =
-		fs_iso_source_desc.bEndpointAddress;
-
-	ss_iso_sink_desc.wMaxPacketSize = isoc_maxpacket;
-	ss_iso_sink_desc.bInterval = isoc_interval;
-	ss_iso_sink_comp_desc.bmAttributes = isoc_mult;
-	ss_iso_sink_comp_desc.bMaxBurst = isoc_maxburst;
-	ss_iso_sink_comp_desc.wBytesPerInterval =
-		isoc_maxpacket * (isoc_mult + 1) * (isoc_maxburst + 1);
-	ss_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
-
-	ret = usb_assign_descriptors(f, fs_source_sink_descs,
-			hs_source_sink_descs, ss_source_sink_descs);
-	if (ret)
-		return ret;
-
-	DBG(cdev, "%s speed %s: IN/%s, OUT/%s, ISO-IN/%s, ISO-OUT/%s\n",
-	    (gadget_is_superspeed(c->cdev->gadget) ? "super" :
-	     (gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full")),
-			f->name, ss->in_ep->name, ss->out_ep->name,
-			ss->iso_in_ep ? ss->iso_in_ep->name : "<none>",
-			ss->iso_out_ep ? ss->iso_out_ep->name : "<none>");
-	return 0;
-}
-
-static void
-sourcesink_free_func(struct usb_function *f)
-{
-	struct f_ss_opts *opts;
-
-	opts = container_of(f->fi, struct f_ss_opts, func_inst);
-
-	mutex_lock(&opts->lock);
-	opts->refcnt--;
-	mutex_unlock(&opts->lock);
-
-	usb_free_all_descriptors(f);
-	kfree(func_to_ss(f));
-}
-
-/* optionally require specific source/sink data patterns  */
-static int check_read_data(struct f_sourcesink *ss, struct usb_request *req)
-{
-	unsigned		i;
-	u8			*buf = req->buf;
-	struct usb_composite_dev *cdev = ss->function.config->cdev;
-
-	if (pattern == 2)
-		return 0;
-
-	for (i = 0; i < req->actual; i++, buf++) {
-		switch (pattern) {
-
-		/* all-zeroes has no synchronization issues */
-		case 0:
-			if (*buf == 0)
-				continue;
-			break;
-
-		/* "mod63" stays in sync with short-terminated transfers,
-		 * OR otherwise when host and gadget agree on how large
-		 * each usb transfer request should be.  Resync is done
-		 * with set_interface or set_config.  (We *WANT* it to
-		 * get quickly out of sync if controllers or their drivers
-		 * stutter for any reason, including buffer duplication...)
-		 */
-		case 1:
-			if (*buf == (u8)(i % 63))
-				continue;
-			break;
-		}
-		ERROR(cdev, "bad OUT byte, buf[%d] = %d\n", i, *buf);
-		usb_ep_set_halt(ss->out_ep);
-		return -EINVAL;
-	}
-	return 0;
-}
-
-static void reinit_write_data(struct usb_ep *ep, struct usb_request *req)
-{
-	unsigned	i;
-	u8		*buf = req->buf;
-
-	switch (pattern) {
-	case 0:
-		memset(req->buf, 0, req->length);
-		break;
-	case 1:
-		for  (i = 0; i < req->length; i++)
-			*buf++ = (u8) (i % 63);
-		break;
-	case 2:
-		break;
-	}
-}
-
-static void source_sink_complete(struct usb_ep *ep, struct usb_request *req)
-{
-	struct usb_composite_dev	*cdev;
-	struct f_sourcesink		*ss = ep->driver_data;
-	int				status = req->status;
-
-	/* driver_data will be null if ep has been disabled */
-	if (!ss)
-		return;
-
-	cdev = ss->function.config->cdev;
-
-	switch (status) {
-
-	case 0:				/* normal completion? */
-		if (ep == ss->out_ep) {
-			check_read_data(ss, req);
-			if (pattern != 2)
-				memset(req->buf, 0x55, req->length);
-		}
-		break;
-
-	/* this endpoint is normally active while we're configured */
-	case -ECONNABORTED:		/* hardware forced ep reset */
-	case -ECONNRESET:		/* request dequeued */
-	case -ESHUTDOWN:		/* disconnect from host */
-		VDBG(cdev, "%s gone (%d), %d/%d\n", ep->name, status,
-				req->actual, req->length);
-		if (ep == ss->out_ep)
-			check_read_data(ss, req);
-		free_ep_req(ep, req);
-		return;
-
-	case -EOVERFLOW:		/* buffer overrun on read means that
-					 * we didn't provide a big enough
-					 * buffer.
-					 */
-	default:
-#if 1
-		DBG(cdev, "%s complete --> %d, %d/%d\n", ep->name,
-				status, req->actual, req->length);
-#endif
-	case -EREMOTEIO:		/* short read */
-		break;
-	}
-
-	status = usb_ep_queue(ep, req, GFP_ATOMIC);
-	if (status) {
-		ERROR(cdev, "kill %s:  resubmit %d bytes --> %d\n",
-				ep->name, req->length, status);
-		usb_ep_set_halt(ep);
-		/* FIXME recover later ... somehow */
-	}
-}
-
-static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in,
-		bool is_iso, int speed)
-{
-	struct usb_ep		*ep;
-	struct usb_request	*req;
-	int			i, size, status;
-
-	for (i = 0; i < 8; i++) {
-		if (is_iso) {
-			switch (speed) {
-			case USB_SPEED_SUPER:
-				size = isoc_maxpacket * (isoc_mult + 1) *
-						(isoc_maxburst + 1);
-				break;
-			case USB_SPEED_HIGH:
-				size = isoc_maxpacket * (isoc_mult + 1);
-				break;
-			default:
-				size = isoc_maxpacket > 1023 ?
-						1023 : isoc_maxpacket;
-				break;
-			}
-			ep = is_in ? ss->iso_in_ep : ss->iso_out_ep;
-			req = ss_alloc_ep_req(ep, size);
-		} else {
-			ep = is_in ? ss->in_ep : ss->out_ep;
-			req = ss_alloc_ep_req(ep, 0);
-		}
-
-		if (!req)
-			return -ENOMEM;
-
-		req->complete = source_sink_complete;
-		if (is_in)
-			reinit_write_data(ep, req);
-		else if (pattern != 2)
-			memset(req->buf, 0x55, req->length);
-
-		status = usb_ep_queue(ep, req, GFP_ATOMIC);
-		if (status) {
-			struct usb_composite_dev	*cdev;
-
-			cdev = ss->function.config->cdev;
-			ERROR(cdev, "start %s%s %s --> %d\n",
-			      is_iso ? "ISO-" : "", is_in ? "IN" : "OUT",
-			      ep->name, status);
-			free_ep_req(ep, req);
-		}
-
-		if (!is_iso)
-			break;
-	}
-
-	return status;
-}
-
-static void disable_source_sink(struct f_sourcesink *ss)
-{
-	struct usb_composite_dev	*cdev;
-
-	cdev = ss->function.config->cdev;
-	disable_endpoints(cdev, ss->in_ep, ss->out_ep, ss->iso_in_ep,
-			ss->iso_out_ep);
-	VDBG(cdev, "%s disabled\n", ss->function.name);
-}
-
-static int
-enable_source_sink(struct usb_composite_dev *cdev, struct f_sourcesink *ss,
-		int alt)
-{
-	int					result = 0;
-	int					speed = cdev->gadget->speed;
-	struct usb_ep				*ep;
-
-	/* one bulk endpoint writes (sources) zeroes IN (to the host) */
-	ep = ss->in_ep;
-	result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
-	if (result)
-		return result;
-	result = usb_ep_enable(ep);
-	if (result < 0)
-		return result;
-	ep->driver_data = ss;
-
-	result = source_sink_start_ep(ss, true, false, speed);
-	if (result < 0) {
-fail:
-		ep = ss->in_ep;
-		usb_ep_disable(ep);
-		ep->driver_data = NULL;
-		return result;
-	}
-
-	/* one bulk endpoint reads (sinks) anything OUT (from the host) */
-	ep = ss->out_ep;
-	result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
-	if (result)
-		goto fail;
-	result = usb_ep_enable(ep);
-	if (result < 0)
-		goto fail;
-	ep->driver_data = ss;
-
-	result = source_sink_start_ep(ss, false, false, speed);
-	if (result < 0) {
-fail2:
-		ep = ss->out_ep;
-		usb_ep_disable(ep);
-		ep->driver_data = NULL;
-		goto fail;
-	}
-
-	if (alt == 0)
-		goto out;
-
-	/* one iso endpoint writes (sources) zeroes IN (to the host) */
-	ep = ss->iso_in_ep;
-	if (ep) {
-		result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
-		if (result)
-			goto fail2;
-		result = usb_ep_enable(ep);
-		if (result < 0)
-			goto fail2;
-		ep->driver_data = ss;
-
-		result = source_sink_start_ep(ss, true, true, speed);
-		if (result < 0) {
-fail3:
-			ep = ss->iso_in_ep;
-			if (ep) {
-				usb_ep_disable(ep);
-				ep->driver_data = NULL;
-			}
-			goto fail2;
-		}
-	}
-
-	/* one iso endpoint reads (sinks) anything OUT (from the host) */
-	ep = ss->iso_out_ep;
-	if (ep) {
-		result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
-		if (result)
-			goto fail3;
-		result = usb_ep_enable(ep);
-		if (result < 0)
-			goto fail3;
-		ep->driver_data = ss;
-
-		result = source_sink_start_ep(ss, false, true, speed);
-		if (result < 0) {
-			usb_ep_disable(ep);
-			ep->driver_data = NULL;
-			goto fail3;
-		}
-	}
-out:
-	ss->cur_alt = alt;
-
-	DBG(cdev, "%s enabled, alt intf %d\n", ss->function.name, alt);
-	return result;
-}
-
-static int sourcesink_set_alt(struct usb_function *f,
-		unsigned intf, unsigned alt)
-{
-	struct f_sourcesink		*ss = func_to_ss(f);
-	struct usb_composite_dev	*cdev = f->config->cdev;
-
-	if (ss->in_ep->driver_data)
-		disable_source_sink(ss);
-	return enable_source_sink(cdev, ss, alt);
-}
-
-static int sourcesink_get_alt(struct usb_function *f, unsigned intf)
-{
-	struct f_sourcesink		*ss = func_to_ss(f);
-
-	return ss->cur_alt;
-}
-
-static void sourcesink_disable(struct usb_function *f)
-{
-	struct f_sourcesink	*ss = func_to_ss(f);
-
-	disable_source_sink(ss);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static int sourcesink_setup(struct usb_function *f,
-		const struct usb_ctrlrequest *ctrl)
-{
-	struct usb_configuration        *c = f->config;
-	struct usb_request	*req = c->cdev->req;
-	int			value = -EOPNOTSUPP;
-	u16			w_index = le16_to_cpu(ctrl->wIndex);
-	u16			w_value = le16_to_cpu(ctrl->wValue);
-	u16			w_length = le16_to_cpu(ctrl->wLength);
-
-	req->length = USB_COMP_EP0_BUFSIZ;
-
-	/* composite driver infrastructure handles everything except
-	 * the two control test requests.
-	 */
-	switch (ctrl->bRequest) {
-
-	/*
-	 * These are the same vendor-specific requests supported by
-	 * Intel's USB 2.0 compliance test devices.  We exceed that
-	 * device spec by allowing multiple-packet requests.
-	 *
-	 * NOTE:  the Control-OUT data stays in req->buf ... better
-	 * would be copying it into a scratch buffer, so that other
-	 * requests may safely intervene.
-	 */
-	case 0x5b:	/* control WRITE test -- fill the buffer */
-		if (ctrl->bRequestType != (USB_DIR_OUT|USB_TYPE_VENDOR))
-			goto unknown;
-		if (w_value || w_index)
-			break;
-		/* just read that many bytes into the buffer */
-		if (w_length > req->length)
-			break;
-		value = w_length;
-		break;
-	case 0x5c:	/* control READ test -- return the buffer */
-		if (ctrl->bRequestType != (USB_DIR_IN|USB_TYPE_VENDOR))
-			goto unknown;
-		if (w_value || w_index)
-			break;
-		/* expect those bytes are still in the buffer; send back */
-		if (w_length > req->length)
-			break;
-		value = w_length;
-		break;
-
-	default:
-unknown:
-		VDBG(c->cdev,
-			"unknown control req%02x.%02x v%04x i%04x l%d\n",
-			ctrl->bRequestType, ctrl->bRequest,
-			w_value, w_index, w_length);
-	}
-
-	/* respond with data transfer or status phase? */
-	if (value >= 0) {
-		VDBG(c->cdev, "source/sink req%02x.%02x v%04x i%04x l%d\n",
-			ctrl->bRequestType, ctrl->bRequest,
-			w_value, w_index, w_length);
-		req->zero = 0;
-		req->length = value;
-		value = usb_ep_queue(c->cdev->gadget->ep0, req, GFP_ATOMIC);
-		if (value < 0)
-			ERROR(c->cdev, "source/sink response, err %d\n",
-					value);
-	}
-
-	/* device either stalls (value < 0) or reports success */
-	return value;
-}
-
-static struct usb_function *source_sink_alloc_func(
-		struct usb_function_instance *fi)
-{
-	struct f_sourcesink     *ss;
-	struct f_ss_opts	*ss_opts;
-
-	ss = kzalloc(sizeof(*ss), GFP_KERNEL);
-	if (!ss)
-		return NULL;
-
-	ss_opts =  container_of(fi, struct f_ss_opts, func_inst);
-
-	mutex_lock(&ss_opts->lock);
-	ss_opts->refcnt++;
-	mutex_unlock(&ss_opts->lock);
-
-	pattern = ss_opts->pattern;
-	isoc_interval = ss_opts->isoc_interval;
-	isoc_maxpacket = ss_opts->isoc_maxpacket;
-	isoc_mult = ss_opts->isoc_mult;
-	isoc_maxburst = ss_opts->isoc_maxburst;
-	buflen = ss_opts->bulk_buflen;
-
-	ss->function.name = "source/sink";
-	ss->function.bind = sourcesink_bind;
-	ss->function.set_alt = sourcesink_set_alt;
-	ss->function.get_alt = sourcesink_get_alt;
-	ss->function.disable = sourcesink_disable;
-	ss->function.setup = sourcesink_setup;
-	ss->function.strings = sourcesink_strings;
-
-	ss->function.free_func = sourcesink_free_func;
-
-	return &ss->function;
-}
-
-static inline struct f_ss_opts *to_f_ss_opts(struct config_item *item)
-{
-	return container_of(to_config_group(item), struct f_ss_opts,
-			    func_inst.group);
-}
-
-CONFIGFS_ATTR_STRUCT(f_ss_opts);
-CONFIGFS_ATTR_OPS(f_ss_opts);
-
-static void ss_attr_release(struct config_item *item)
-{
-	struct f_ss_opts *ss_opts = to_f_ss_opts(item);
-
-	usb_put_function_instance(&ss_opts->func_inst);
-}
-
-static struct configfs_item_operations ss_item_ops = {
-	.release		= ss_attr_release,
-	.show_attribute		= f_ss_opts_attr_show,
-	.store_attribute	= f_ss_opts_attr_store,
-};
-
-static ssize_t f_ss_opts_pattern_show(struct f_ss_opts *opts, char *page)
-{
-	int result;
-
-	mutex_lock(&opts->lock);
-	result = sprintf(page, "%d", opts->pattern);
-	mutex_unlock(&opts->lock);
-
-	return result;
-}
-
-static ssize_t f_ss_opts_pattern_store(struct f_ss_opts *opts,
-				       const char *page, size_t len)
-{
-	int ret;
-	u8 num;
-
-	mutex_lock(&opts->lock);
-	if (opts->refcnt) {
-		ret = -EBUSY;
-		goto end;
-	}
-
-	ret = kstrtou8(page, 0, &num);
-	if (ret)
-		goto end;
-
-	if (num != 0 && num != 1 && num != 2) {
-		ret = -EINVAL;
-		goto end;
-	}
-
-	opts->pattern = num;
-	ret = len;
-end:
-	mutex_unlock(&opts->lock);
-	return ret;
-}
-
-static struct f_ss_opts_attribute f_ss_opts_pattern =
-	__CONFIGFS_ATTR(pattern, S_IRUGO | S_IWUSR,
-			f_ss_opts_pattern_show,
-			f_ss_opts_pattern_store);
-
-static ssize_t f_ss_opts_isoc_interval_show(struct f_ss_opts *opts, char *page)
-{
-	int result;
-
-	mutex_lock(&opts->lock);
-	result = sprintf(page, "%d", opts->isoc_interval);
-	mutex_unlock(&opts->lock);
-
-	return result;
-}
-
-static ssize_t f_ss_opts_isoc_interval_store(struct f_ss_opts *opts,
-				       const char *page, size_t len)
-{
-	int ret;
-	u8 num;
-
-	mutex_lock(&opts->lock);
-	if (opts->refcnt) {
-		ret = -EBUSY;
-		goto end;
-	}
-
-	ret = kstrtou8(page, 0, &num);
-	if (ret)
-		goto end;
-
-	if (num > 16) {
-		ret = -EINVAL;
-		goto end;
-	}
-
-	opts->isoc_interval = num;
-	ret = len;
-end:
-	mutex_unlock(&opts->lock);
-	return ret;
-}
-
-static struct f_ss_opts_attribute f_ss_opts_isoc_interval =
-	__CONFIGFS_ATTR(isoc_interval, S_IRUGO | S_IWUSR,
-			f_ss_opts_isoc_interval_show,
-			f_ss_opts_isoc_interval_store);
-
-static ssize_t f_ss_opts_isoc_maxpacket_show(struct f_ss_opts *opts, char *page)
-{
-	int result;
-
-	mutex_lock(&opts->lock);
-	result = sprintf(page, "%d", opts->isoc_maxpacket);
-	mutex_unlock(&opts->lock);
-
-	return result;
-}
-
-static ssize_t f_ss_opts_isoc_maxpacket_store(struct f_ss_opts *opts,
-				       const char *page, size_t len)
-{
-	int ret;
-	u16 num;
-
-	mutex_lock(&opts->lock);
-	if (opts->refcnt) {
-		ret = -EBUSY;
-		goto end;
-	}
-
-	ret = kstrtou16(page, 0, &num);
-	if (ret)
-		goto end;
-
-	if (num > 1024) {
-		ret = -EINVAL;
-		goto end;
-	}
-
-	opts->isoc_maxpacket = num;
-	ret = len;
-end:
-	mutex_unlock(&opts->lock);
-	return ret;
-}
-
-static struct f_ss_opts_attribute f_ss_opts_isoc_maxpacket =
-	__CONFIGFS_ATTR(isoc_maxpacket, S_IRUGO | S_IWUSR,
-			f_ss_opts_isoc_maxpacket_show,
-			f_ss_opts_isoc_maxpacket_store);
-
-static ssize_t f_ss_opts_isoc_mult_show(struct f_ss_opts *opts, char *page)
-{
-	int result;
-
-	mutex_lock(&opts->lock);
-	result = sprintf(page, "%d", opts->isoc_mult);
-	mutex_unlock(&opts->lock);
-
-	return result;
-}
-
-static ssize_t f_ss_opts_isoc_mult_store(struct f_ss_opts *opts,
-				       const char *page, size_t len)
-{
-	int ret;
-	u8 num;
-
-	mutex_lock(&opts->lock);
-	if (opts->refcnt) {
-		ret = -EBUSY;
-		goto end;
-	}
-
-	ret = kstrtou8(page, 0, &num);
-	if (ret)
-		goto end;
-
-	if (num > 2) {
-		ret = -EINVAL;
-		goto end;
-	}
-
-	opts->isoc_mult = num;
-	ret = len;
-end:
-	mutex_unlock(&opts->lock);
-	return ret;
-}
-
-static struct f_ss_opts_attribute f_ss_opts_isoc_mult =
-	__CONFIGFS_ATTR(isoc_mult, S_IRUGO | S_IWUSR,
-			f_ss_opts_isoc_mult_show,
-			f_ss_opts_isoc_mult_store);
-
-static ssize_t f_ss_opts_isoc_maxburst_show(struct f_ss_opts *opts, char *page)
-{
-	int result;
-
-	mutex_lock(&opts->lock);
-	result = sprintf(page, "%d", opts->isoc_maxburst);
-	mutex_unlock(&opts->lock);
-
-	return result;
-}
-
-static ssize_t f_ss_opts_isoc_maxburst_store(struct f_ss_opts *opts,
-				       const char *page, size_t len)
-{
-	int ret;
-	u8 num;
-
-	mutex_lock(&opts->lock);
-	if (opts->refcnt) {
-		ret = -EBUSY;
-		goto end;
-	}
-
-	ret = kstrtou8(page, 0, &num);
-	if (ret)
-		goto end;
-
-	if (num > 15) {
-		ret = -EINVAL;
-		goto end;
-	}
-
-	opts->isoc_maxburst = num;
-	ret = len;
-end:
-	mutex_unlock(&opts->lock);
-	return ret;
-}
-
-static struct f_ss_opts_attribute f_ss_opts_isoc_maxburst =
-	__CONFIGFS_ATTR(isoc_maxburst, S_IRUGO | S_IWUSR,
-			f_ss_opts_isoc_maxburst_show,
-			f_ss_opts_isoc_maxburst_store);
-
-static ssize_t f_ss_opts_bulk_buflen_show(struct f_ss_opts *opts, char *page)
-{
-	int result;
-
-	mutex_lock(&opts->lock);
-	result = sprintf(page, "%d", opts->bulk_buflen);
-	mutex_unlock(&opts->lock);
-
-	return result;
-}
-
-static ssize_t f_ss_opts_bulk_buflen_store(struct f_ss_opts *opts,
-					   const char *page, size_t len)
-{
-	int ret;
-	u32 num;
-
-	mutex_lock(&opts->lock);
-	if (opts->refcnt) {
-		ret = -EBUSY;
-		goto end;
-	}
-
-	ret = kstrtou32(page, 0, &num);
-	if (ret)
-		goto end;
-
-	opts->bulk_buflen = num;
-	ret = len;
-end:
-	mutex_unlock(&opts->lock);
-	return ret;
-}
-
-static struct f_ss_opts_attribute f_ss_opts_bulk_buflen =
-	__CONFIGFS_ATTR(buflen, S_IRUGO | S_IWUSR,
-			f_ss_opts_bulk_buflen_show,
-			f_ss_opts_bulk_buflen_store);
-
-static struct configfs_attribute *ss_attrs[] = {
-	&f_ss_opts_pattern.attr,
-	&f_ss_opts_isoc_interval.attr,
-	&f_ss_opts_isoc_maxpacket.attr,
-	&f_ss_opts_isoc_mult.attr,
-	&f_ss_opts_isoc_maxburst.attr,
-	&f_ss_opts_bulk_buflen.attr,
-	NULL,
-};
-
-static struct config_item_type ss_func_type = {
-	.ct_item_ops    = &ss_item_ops,
-	.ct_attrs	= ss_attrs,
-	.ct_owner       = THIS_MODULE,
-};
-
-static void source_sink_free_instance(struct usb_function_instance *fi)
-{
-	struct f_ss_opts *ss_opts;
-
-	ss_opts = container_of(fi, struct f_ss_opts, func_inst);
-	kfree(ss_opts);
-}
-
-static struct usb_function_instance *source_sink_alloc_inst(void)
-{
-	struct f_ss_opts *ss_opts;
-
-	ss_opts = kzalloc(sizeof(*ss_opts), GFP_KERNEL);
-	if (!ss_opts)
-		return ERR_PTR(-ENOMEM);
-	mutex_init(&ss_opts->lock);
-	ss_opts->func_inst.free_func_inst = source_sink_free_instance;
-	ss_opts->isoc_interval = GZERO_ISOC_INTERVAL;
-	ss_opts->isoc_maxpacket = GZERO_ISOC_MAXPACKET;
-	ss_opts->bulk_buflen = GZERO_BULK_BUFLEN;
-
-	config_group_init_type_name(&ss_opts->func_inst.group, "",
-				    &ss_func_type);
-
-	return &ss_opts->func_inst;
-}
-DECLARE_USB_FUNCTION(SourceSink, source_sink_alloc_inst,
-		source_sink_alloc_func);
-
-static int __init sslb_modinit(void)
-{
-	int ret;
-
-	ret = usb_function_register(&SourceSinkusb_func);
-	if (ret)
-		return ret;
-	ret = lb_modinit();
-	if (ret)
-		usb_function_unregister(&SourceSinkusb_func);
-	return ret;
-}
-static void __exit sslb_modexit(void)
-{
-	usb_function_unregister(&SourceSinkusb_func);
-	lb_modexit();
-}
-module_init(sslb_modinit);
-module_exit(sslb_modexit);
-
-MODULE_LICENSE("GPL");