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, 571 deletions

diff --git a/drivers/usb/gadget/f_loopback.c b/drivers/usb/gadget/f_loopback.c
deleted file mode 100644
index 4557cd03f0b1..000000000000
--- a/drivers/usb/gadget/f_loopback.c
+++ /dev/null
@@ -1,571 +0,0 @@
-/*
- * f_loopback.c - USB peripheral loopback 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/err.h>
-#include <linux/usb/composite.h>
-
-#include "g_zero.h"
-#include "u_f.h"
-
-/*
- * LOOPBACK FUNCTION ... a testing vehicle for USB peripherals,
- *
- * This takes messages of various sizes written OUT to a device, and loops
- * them back so they can be read IN from it.  It has been used by certain
- * test applications.  It supports limited testing of data queueing logic.
- *
- *
- * 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_loopback {
-	struct usb_function	function;
-
-	struct usb_ep		*in_ep;
-	struct usb_ep		*out_ep;
-};
-
-static inline struct f_loopback *func_to_loop(struct usb_function *f)
-{
-	return container_of(f, struct f_loopback, function);
-}
-
-static unsigned qlen;
-static unsigned buflen;
-
-/*-------------------------------------------------------------------------*/
-
-static struct usb_interface_descriptor loopback_intf = {
-	.bLength =		sizeof loopback_intf,
-	.bDescriptorType =	USB_DT_INTERFACE,
-
-	.bNumEndpoints =	2,
-	.bInterfaceClass =	USB_CLASS_VENDOR_SPEC,
-	/* .iInterface = DYNAMIC */
-};
-
-/* full speed support: */
-
-static struct usb_endpoint_descriptor fs_loop_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_loop_sink_desc = {
-	.bLength =		USB_DT_ENDPOINT_SIZE,
-	.bDescriptorType =	USB_DT_ENDPOINT,
-
-	.bEndpointAddress =	USB_DIR_OUT,
-	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
-};
-
-static struct usb_descriptor_header *fs_loopback_descs[] = {
-	(struct usb_descriptor_header *) &loopback_intf,
-	(struct usb_descriptor_header *) &fs_loop_sink_desc,
-	(struct usb_descriptor_header *) &fs_loop_source_desc,
-	NULL,
-};
-
-/* high speed support: */
-
-static struct usb_endpoint_descriptor hs_loop_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_loop_sink_desc = {
-	.bLength =		USB_DT_ENDPOINT_SIZE,
-	.bDescriptorType =	USB_DT_ENDPOINT,
-
-	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
-	.wMaxPacketSize =	cpu_to_le16(512),
-};
-
-static struct usb_descriptor_header *hs_loopback_descs[] = {
-	(struct usb_descriptor_header *) &loopback_intf,
-	(struct usb_descriptor_header *) &hs_loop_source_desc,
-	(struct usb_descriptor_header *) &hs_loop_sink_desc,
-	NULL,
-};
-
-/* super speed support: */
-
-static struct usb_endpoint_descriptor ss_loop_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_loop_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_loop_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_loop_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_descriptor_header *ss_loopback_descs[] = {
-	(struct usb_descriptor_header *) &loopback_intf,
-	(struct usb_descriptor_header *) &ss_loop_source_desc,
-	(struct usb_descriptor_header *) &ss_loop_source_comp_desc,
-	(struct usb_descriptor_header *) &ss_loop_sink_desc,
-	(struct usb_descriptor_header *) &ss_loop_sink_comp_desc,
-	NULL,
-};
-
-/* function-specific strings: */
-
-static struct usb_string strings_loopback[] = {
-	[0].s = "loop input to output",
-	{  }			/* end of list */
-};
-
-static struct usb_gadget_strings stringtab_loop = {
-	.language	= 0x0409,	/* en-us */
-	.strings	= strings_loopback,
-};
-
-static struct usb_gadget_strings *loopback_strings[] = {
-	&stringtab_loop,
-	NULL,
-};
-
-/*-------------------------------------------------------------------------*/
-
-static int loopback_bind(struct usb_configuration *c, struct usb_function *f)
-{
-	struct usb_composite_dev *cdev = c->cdev;
-	struct f_loopback	*loop = func_to_loop(f);
-	int			id;
-	int ret;
-
-	/* allocate interface ID(s) */
-	id = usb_interface_id(c, f);
-	if (id < 0)
-		return id;
-	loopback_intf.bInterfaceNumber = id;
-
-	id = usb_string_id(cdev);
-	if (id < 0)
-		return id;
-	strings_loopback[0].id = id;
-	loopback_intf.iInterface = id;
-
-	/* allocate endpoints */
-
-	loop->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_loop_source_desc);
-	if (!loop->in_ep) {
-autoconf_fail:
-		ERROR(cdev, "%s: can't autoconfigure on %s\n",
-			f->name, cdev->gadget->name);
-		return -ENODEV;
-	}
-	loop->in_ep->driver_data = cdev;	/* claim */
-
-	loop->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_loop_sink_desc);
-	if (!loop->out_ep)
-		goto autoconf_fail;
-	loop->out_ep->driver_data = cdev;	/* claim */
-
-	/* support high speed hardware */
-	hs_loop_source_desc.bEndpointAddress =
-		fs_loop_source_desc.bEndpointAddress;
-	hs_loop_sink_desc.bEndpointAddress = fs_loop_sink_desc.bEndpointAddress;
-
-	/* support super speed hardware */
-	ss_loop_source_desc.bEndpointAddress =
-		fs_loop_source_desc.bEndpointAddress;
-	ss_loop_sink_desc.bEndpointAddress = fs_loop_sink_desc.bEndpointAddress;
-
-	ret = usb_assign_descriptors(f, fs_loopback_descs, hs_loopback_descs,
-			ss_loopback_descs);
-	if (ret)
-		return ret;
-
-	DBG(cdev, "%s speed %s: IN/%s, OUT/%s\n",
-	    (gadget_is_superspeed(c->cdev->gadget) ? "super" :
-	     (gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full")),
-			f->name, loop->in_ep->name, loop->out_ep->name);
-	return 0;
-}
-
-static void lb_free_func(struct usb_function *f)
-{
-	struct f_lb_opts *opts;
-
-	opts = container_of(f->fi, struct f_lb_opts, func_inst);
-
-	mutex_lock(&opts->lock);
-	opts->refcnt--;
-	mutex_unlock(&opts->lock);
-
-	usb_free_all_descriptors(f);
-	kfree(func_to_loop(f));
-}
-
-static void loopback_complete(struct usb_ep *ep, struct usb_request *req)
-{
-	struct f_loopback	*loop = ep->driver_data;
-	struct usb_composite_dev *cdev = loop->function.config->cdev;
-	int			status = req->status;
-
-	switch (status) {
-
-	case 0:				/* normal completion? */
-		if (ep == loop->out_ep) {
-			/* loop this OUT packet back IN to the host */
-			req->zero = (req->actual < req->length);
-			req->length = req->actual;
-			status = usb_ep_queue(loop->in_ep, req, GFP_ATOMIC);
-			if (status == 0)
-				return;
-
-			/* "should never get here" */
-			ERROR(cdev, "can't loop %s to %s: %d\n",
-				ep->name, loop->in_ep->name,
-				status);
-		}
-
-		/* queue the buffer for some later OUT packet */
-		req->length = buflen;
-		status = usb_ep_queue(loop->out_ep, req, GFP_ATOMIC);
-		if (status == 0)
-			return;
-
-		/* "should never get here" */
-		/* FALLTHROUGH */
-
-	default:
-		ERROR(cdev, "%s loop complete --> %d, %d/%d\n", ep->name,
-				status, req->actual, req->length);
-		/* FALLTHROUGH */
-
-	/* NOTE:  since this driver doesn't maintain an explicit record
-	 * of requests it submitted (just maintains qlen count), we
-	 * rely on the hardware driver to clean up on disconnect or
-	 * endpoint disable.
-	 */
-	case -ECONNABORTED:		/* hardware forced ep reset */
-	case -ECONNRESET:		/* request dequeued */
-	case -ESHUTDOWN:		/* disconnect from host */
-		free_ep_req(ep, req);
-		return;
-	}
-}
-
-static void disable_loopback(struct f_loopback *loop)
-{
-	struct usb_composite_dev	*cdev;
-
-	cdev = loop->function.config->cdev;
-	disable_endpoints(cdev, loop->in_ep, loop->out_ep, NULL, NULL);
-	VDBG(cdev, "%s disabled\n", loop->function.name);
-}
-
-static inline struct usb_request *lb_alloc_ep_req(struct usb_ep *ep, int len)
-{
-	return alloc_ep_req(ep, len, buflen);
-}
-
-static int
-enable_loopback(struct usb_composite_dev *cdev, struct f_loopback *loop)
-{
-	int					result = 0;
-	struct usb_ep				*ep;
-	struct usb_request			*req;
-	unsigned				i;
-
-	/* one endpoint writes data back IN to the host */
-	ep = loop->in_ep;
-	result = config_ep_by_speed(cdev->gadget, &(loop->function), ep);
-	if (result)
-		return result;
-	result = usb_ep_enable(ep);
-	if (result < 0)
-		return result;
-	ep->driver_data = loop;
-
-	/* one endpoint just reads OUT packets */
-	ep = loop->out_ep;
-	result = config_ep_by_speed(cdev->gadget, &(loop->function), ep);
-	if (result)
-		goto fail0;
-
-	result = usb_ep_enable(ep);
-	if (result < 0) {
-fail0:
-		ep = loop->in_ep;
-		usb_ep_disable(ep);
-		ep->driver_data = NULL;
-		return result;
-	}
-	ep->driver_data = loop;
-
-	/* allocate a bunch of read buffers and queue them all at once.
-	 * we buffer at most 'qlen' transfers; fewer if any need more
-	 * than 'buflen' bytes each.
-	 */
-	for (i = 0; i < qlen && result == 0; i++) {
-		req = lb_alloc_ep_req(ep, 0);
-		if (req) {
-			req->complete = loopback_complete;
-			result = usb_ep_queue(ep, req, GFP_ATOMIC);
-			if (result)
-				ERROR(cdev, "%s queue req --> %d\n",
-						ep->name, result);
-		} else {
-			usb_ep_disable(ep);
-			ep->driver_data = NULL;
-			result = -ENOMEM;
-			goto fail0;
-		}
-	}
-
-	DBG(cdev, "%s enabled\n", loop->function.name);
-	return result;
-}
-
-static int loopback_set_alt(struct usb_function *f,
-		unsigned intf, unsigned alt)
-{
-	struct f_loopback	*loop = func_to_loop(f);
-	struct usb_composite_dev *cdev = f->config->cdev;
-
-	/* we know alt is zero */
-	if (loop->in_ep->driver_data)
-		disable_loopback(loop);
-	return enable_loopback(cdev, loop);
-}
-
-static void loopback_disable(struct usb_function *f)
-{
-	struct f_loopback	*loop = func_to_loop(f);
-
-	disable_loopback(loop);
-}
-
-static struct usb_function *loopback_alloc(struct usb_function_instance *fi)
-{
-	struct f_loopback	*loop;
-	struct f_lb_opts	*lb_opts;
-
-	loop = kzalloc(sizeof *loop, GFP_KERNEL);
-	if (!loop)
-		return ERR_PTR(-ENOMEM);
-
-	lb_opts = container_of(fi, struct f_lb_opts, func_inst);
-
-	mutex_lock(&lb_opts->lock);
-	lb_opts->refcnt++;
-	mutex_unlock(&lb_opts->lock);
-
-	buflen = lb_opts->bulk_buflen;
-	qlen = lb_opts->qlen;
-	if (!qlen)
-		qlen = 32;
-
-	loop->function.name = "loopback";
-	loop->function.bind = loopback_bind;
-	loop->function.set_alt = loopback_set_alt;
-	loop->function.disable = loopback_disable;
-	loop->function.strings = loopback_strings;
-
-	loop->function.free_func = lb_free_func;
-
-	return &loop->function;
-}
-
-static inline struct f_lb_opts *to_f_lb_opts(struct config_item *item)
-{
-	return container_of(to_config_group(item), struct f_lb_opts,
-			    func_inst.group);
-}
-
-CONFIGFS_ATTR_STRUCT(f_lb_opts);
-CONFIGFS_ATTR_OPS(f_lb_opts);
-
-static void lb_attr_release(struct config_item *item)
-{
-	struct f_lb_opts *lb_opts = to_f_lb_opts(item);
-
-	usb_put_function_instance(&lb_opts->func_inst);
-}
-
-static struct configfs_item_operations lb_item_ops = {
-	.release		= lb_attr_release,
-	.show_attribute		= f_lb_opts_attr_show,
-	.store_attribute	= f_lb_opts_attr_store,
-};
-
-static ssize_t f_lb_opts_qlen_show(struct f_lb_opts *opts, char *page)
-{
-	int result;
-
-	mutex_lock(&opts->lock);
-	result = sprintf(page, "%d", opts->qlen);
-	mutex_unlock(&opts->lock);
-
-	return result;
-}
-
-static ssize_t f_lb_opts_qlen_store(struct f_lb_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->qlen = num;
-	ret = len;
-end:
-	mutex_unlock(&opts->lock);
-	return ret;
-}
-
-static struct f_lb_opts_attribute f_lb_opts_qlen =
-	__CONFIGFS_ATTR(qlen, S_IRUGO | S_IWUSR,
-			f_lb_opts_qlen_show,
-			f_lb_opts_qlen_store);
-
-static ssize_t f_lb_opts_bulk_buflen_show(struct f_lb_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_lb_opts_bulk_buflen_store(struct f_lb_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_lb_opts_attribute f_lb_opts_bulk_buflen =
-	__CONFIGFS_ATTR(buflen, S_IRUGO | S_IWUSR,
-			f_lb_opts_bulk_buflen_show,
-			f_lb_opts_bulk_buflen_store);
-
-static struct configfs_attribute *lb_attrs[] = {
-	&f_lb_opts_qlen.attr,
-	&f_lb_opts_bulk_buflen.attr,
-	NULL,
-};
-
-static struct config_item_type lb_func_type = {
-	.ct_item_ops    = &lb_item_ops,
-	.ct_attrs	= lb_attrs,
-	.ct_owner       = THIS_MODULE,
-};
-
-static void lb_free_instance(struct usb_function_instance *fi)
-{
-	struct f_lb_opts *lb_opts;
-
-	lb_opts = container_of(fi, struct f_lb_opts, func_inst);
-	kfree(lb_opts);
-}
-
-static struct usb_function_instance *loopback_alloc_instance(void)
-{
-	struct f_lb_opts *lb_opts;
-
-	lb_opts = kzalloc(sizeof(*lb_opts), GFP_KERNEL);
-	if (!lb_opts)
-		return ERR_PTR(-ENOMEM);
-	mutex_init(&lb_opts->lock);
-	lb_opts->func_inst.free_func_inst = lb_free_instance;
-	lb_opts->bulk_buflen = GZERO_BULK_BUFLEN;
-	lb_opts->qlen = GZERO_QLEN;
-
-	config_group_init_type_name(&lb_opts->func_inst.group, "",
-				    &lb_func_type);
-
-	return  &lb_opts->func_inst;
-}
-DECLARE_USB_FUNCTION(Loopback, loopback_alloc_instance, loopback_alloc);
-
-int __init lb_modinit(void)
-{
-	int ret;
-
-	ret = usb_function_register(&Loopbackusb_func);
-	if (ret)
-		return ret;
-	return ret;
-}
-void __exit lb_modexit(void)
-{
-	usb_function_unregister(&Loopbackusb_func);
-}
-
-MODULE_LICENSE("GPL");