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![Alexey Dobriyan](/assets/img/avatar_default.png)
* remove asm/atomic.h inclusion from linux/utsname.h -- not needed after kref conversion * remove linux/utsname.h inclusion from files which do not need it NOTE: it looks like fs/binfmt_elf.c do not need utsname.h, however due to some personality stuff it _is_ needed -- cowardly leave ELF-related headers and files alone. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
535 lines
14 KiB
C
535 lines
14 KiB
C
/*
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* f_sourcesink.c - USB peripheral source/sink configuration driver
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*
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* Copyright (C) 2003-2008 David Brownell
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* Copyright (C) 2008 by Nokia Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* #define VERBOSE_DEBUG */
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include "g_zero.h"
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#include "gadget_chips.h"
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/*
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* SOURCE/SINK FUNCTION ... a primary testing vehicle for USB peripheral
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* controller drivers.
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*
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* This just sinks bulk packets OUT to the peripheral and sources them IN
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* to the host, optionally with specific data patterns for integrity tests.
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* As such it supports basic functionality and load tests.
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*
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* In terms of control messaging, this supports all the standard requests
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* plus two that support control-OUT tests. If the optional "autoresume"
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* mode is enabled, it provides good functional coverage for the "USBCV"
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* test harness from USB-IF.
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*
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* Note that because this doesn't queue more than one request at a time,
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* some other function must be used to test queueing logic. The network
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* link (g_ether) is the best overall option for that, since its TX and RX
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* queues are relatively independent, will receive a range of packet sizes,
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* and can often be made to run out completely. Those issues are important
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* when stress testing peripheral controller drivers.
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*
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*
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* This is currently packaged as a configuration driver, which can't be
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* combined with other functions to make composite devices. However, it
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* can be combined with other independent configurations.
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*/
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struct f_sourcesink {
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struct usb_function function;
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struct usb_ep *in_ep;
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struct usb_ep *out_ep;
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};
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static inline struct f_sourcesink *func_to_ss(struct usb_function *f)
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{
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return container_of(f, struct f_sourcesink, function);
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}
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static unsigned pattern;
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module_param(pattern, uint, 0);
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MODULE_PARM_DESC(pattern, "0 = all zeroes, 1 = mod63 ");
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/*-------------------------------------------------------------------------*/
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static struct usb_interface_descriptor source_sink_intf = {
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.bLength = sizeof source_sink_intf,
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.bDescriptorType = USB_DT_INTERFACE,
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.bNumEndpoints = 2,
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.bInterfaceClass = USB_CLASS_VENDOR_SPEC,
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/* .iInterface = DYNAMIC */
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};
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/* full speed support: */
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static struct usb_endpoint_descriptor fs_source_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_IN,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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};
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static struct usb_endpoint_descriptor fs_sink_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_OUT,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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};
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static struct usb_descriptor_header *fs_source_sink_descs[] = {
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(struct usb_descriptor_header *) &source_sink_intf,
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(struct usb_descriptor_header *) &fs_sink_desc,
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(struct usb_descriptor_header *) &fs_source_desc,
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NULL,
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};
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/* high speed support: */
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static struct usb_endpoint_descriptor hs_source_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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.wMaxPacketSize = cpu_to_le16(512),
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};
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static struct usb_endpoint_descriptor hs_sink_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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.wMaxPacketSize = cpu_to_le16(512),
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};
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static struct usb_descriptor_header *hs_source_sink_descs[] = {
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(struct usb_descriptor_header *) &source_sink_intf,
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(struct usb_descriptor_header *) &hs_source_desc,
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(struct usb_descriptor_header *) &hs_sink_desc,
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NULL,
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};
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/* function-specific strings: */
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static struct usb_string strings_sourcesink[] = {
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[0].s = "source and sink data",
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{ } /* end of list */
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};
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static struct usb_gadget_strings stringtab_sourcesink = {
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.language = 0x0409, /* en-us */
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.strings = strings_sourcesink,
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};
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static struct usb_gadget_strings *sourcesink_strings[] = {
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&stringtab_sourcesink,
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NULL,
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};
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/*-------------------------------------------------------------------------*/
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static int __init
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sourcesink_bind(struct usb_configuration *c, struct usb_function *f)
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{
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struct usb_composite_dev *cdev = c->cdev;
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struct f_sourcesink *ss = func_to_ss(f);
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int id;
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/* allocate interface ID(s) */
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id = usb_interface_id(c, f);
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if (id < 0)
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return id;
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source_sink_intf.bInterfaceNumber = id;
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/* allocate endpoints */
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ss->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_source_desc);
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if (!ss->in_ep) {
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autoconf_fail:
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ERROR(cdev, "%s: can't autoconfigure on %s\n",
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f->name, cdev->gadget->name);
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return -ENODEV;
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}
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ss->in_ep->driver_data = cdev; /* claim */
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ss->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_sink_desc);
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if (!ss->out_ep)
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goto autoconf_fail;
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ss->out_ep->driver_data = cdev; /* claim */
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/* support high speed hardware */
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if (gadget_is_dualspeed(c->cdev->gadget)) {
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hs_source_desc.bEndpointAddress =
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fs_source_desc.bEndpointAddress;
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hs_sink_desc.bEndpointAddress =
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fs_sink_desc.bEndpointAddress;
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f->hs_descriptors = hs_source_sink_descs;
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}
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DBG(cdev, "%s speed %s: IN/%s, OUT/%s\n",
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gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
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f->name, ss->in_ep->name, ss->out_ep->name);
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return 0;
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}
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static void
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sourcesink_unbind(struct usb_configuration *c, struct usb_function *f)
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{
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kfree(func_to_ss(f));
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}
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/* optionally require specific source/sink data patterns */
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static int check_read_data(struct f_sourcesink *ss, struct usb_request *req)
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{
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unsigned i;
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u8 *buf = req->buf;
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struct usb_composite_dev *cdev = ss->function.config->cdev;
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for (i = 0; i < req->actual; i++, buf++) {
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switch (pattern) {
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/* all-zeroes has no synchronization issues */
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case 0:
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if (*buf == 0)
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continue;
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break;
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/* "mod63" stays in sync with short-terminated transfers,
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* OR otherwise when host and gadget agree on how large
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* each usb transfer request should be. Resync is done
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* with set_interface or set_config. (We *WANT* it to
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* get quickly out of sync if controllers or their drivers
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* stutter for any reason, including buffer duplcation...)
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*/
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case 1:
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if (*buf == (u8)(i % 63))
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continue;
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break;
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}
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ERROR(cdev, "bad OUT byte, buf[%d] = %d\n", i, *buf);
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usb_ep_set_halt(ss->out_ep);
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return -EINVAL;
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}
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return 0;
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}
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static void reinit_write_data(struct usb_ep *ep, struct usb_request *req)
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{
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unsigned i;
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u8 *buf = req->buf;
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switch (pattern) {
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case 0:
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memset(req->buf, 0, req->length);
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break;
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case 1:
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for (i = 0; i < req->length; i++)
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*buf++ = (u8) (i % 63);
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break;
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}
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}
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static void source_sink_complete(struct usb_ep *ep, struct usb_request *req)
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{
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struct f_sourcesink *ss = ep->driver_data;
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struct usb_composite_dev *cdev = ss->function.config->cdev;
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int status = req->status;
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switch (status) {
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case 0: /* normal completion? */
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if (ep == ss->out_ep) {
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check_read_data(ss, req);
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memset(req->buf, 0x55, req->length);
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} else
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reinit_write_data(ep, req);
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break;
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/* this endpoint is normally active while we're configured */
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case -ECONNABORTED: /* hardware forced ep reset */
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case -ECONNRESET: /* request dequeued */
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case -ESHUTDOWN: /* disconnect from host */
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VDBG(cdev, "%s gone (%d), %d/%d\n", ep->name, status,
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req->actual, req->length);
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if (ep == ss->out_ep)
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check_read_data(ss, req);
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free_ep_req(ep, req);
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return;
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case -EOVERFLOW: /* buffer overrun on read means that
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* we didn't provide a big enough
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* buffer.
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*/
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default:
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#if 1
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DBG(cdev, "%s complete --> %d, %d/%d\n", ep->name,
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status, req->actual, req->length);
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#endif
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case -EREMOTEIO: /* short read */
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break;
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}
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status = usb_ep_queue(ep, req, GFP_ATOMIC);
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if (status) {
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ERROR(cdev, "kill %s: resubmit %d bytes --> %d\n",
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ep->name, req->length, status);
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usb_ep_set_halt(ep);
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/* FIXME recover later ... somehow */
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}
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}
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static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in)
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{
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struct usb_ep *ep;
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struct usb_request *req;
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int status;
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ep = is_in ? ss->in_ep : ss->out_ep;
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req = alloc_ep_req(ep);
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if (!req)
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return -ENOMEM;
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req->complete = source_sink_complete;
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if (is_in)
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reinit_write_data(ep, req);
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else
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memset(req->buf, 0x55, req->length);
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status = usb_ep_queue(ep, req, GFP_ATOMIC);
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if (status) {
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struct usb_composite_dev *cdev;
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cdev = ss->function.config->cdev;
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ERROR(cdev, "start %s %s --> %d\n",
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is_in ? "IN" : "OUT",
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ep->name, status);
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free_ep_req(ep, req);
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}
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return status;
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}
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static void disable_source_sink(struct f_sourcesink *ss)
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{
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struct usb_composite_dev *cdev;
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cdev = ss->function.config->cdev;
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disable_endpoints(cdev, ss->in_ep, ss->out_ep);
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VDBG(cdev, "%s disabled\n", ss->function.name);
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}
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static int
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enable_source_sink(struct usb_composite_dev *cdev, struct f_sourcesink *ss)
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{
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int result = 0;
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const struct usb_endpoint_descriptor *src, *sink;
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struct usb_ep *ep;
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src = ep_choose(cdev->gadget, &hs_source_desc, &fs_source_desc);
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sink = ep_choose(cdev->gadget, &hs_sink_desc, &fs_sink_desc);
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/* one endpoint writes (sources) zeroes IN (to the host) */
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ep = ss->in_ep;
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result = usb_ep_enable(ep, src);
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if (result < 0)
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return result;
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ep->driver_data = ss;
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result = source_sink_start_ep(ss, true);
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if (result < 0) {
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fail:
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ep = ss->in_ep;
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usb_ep_disable(ep);
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ep->driver_data = NULL;
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return result;
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}
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/* one endpoint reads (sinks) anything OUT (from the host) */
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ep = ss->out_ep;
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result = usb_ep_enable(ep, sink);
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if (result < 0)
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goto fail;
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ep->driver_data = ss;
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result = source_sink_start_ep(ss, false);
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if (result < 0) {
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usb_ep_disable(ep);
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ep->driver_data = NULL;
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goto fail;
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}
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DBG(cdev, "%s enabled\n", ss->function.name);
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return result;
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}
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static int sourcesink_set_alt(struct usb_function *f,
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unsigned intf, unsigned alt)
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{
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struct f_sourcesink *ss = func_to_ss(f);
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struct usb_composite_dev *cdev = f->config->cdev;
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/* we know alt is zero */
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if (ss->in_ep->driver_data)
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disable_source_sink(ss);
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return enable_source_sink(cdev, ss);
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}
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static void sourcesink_disable(struct usb_function *f)
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{
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struct f_sourcesink *ss = func_to_ss(f);
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disable_source_sink(ss);
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}
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/*-------------------------------------------------------------------------*/
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static int __init sourcesink_bind_config(struct usb_configuration *c)
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{
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struct f_sourcesink *ss;
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int status;
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ss = kzalloc(sizeof *ss, GFP_KERNEL);
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if (!ss)
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return -ENOMEM;
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ss->function.name = "source/sink";
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ss->function.descriptors = fs_source_sink_descs;
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ss->function.bind = sourcesink_bind;
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ss->function.unbind = sourcesink_unbind;
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ss->function.set_alt = sourcesink_set_alt;
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ss->function.disable = sourcesink_disable;
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status = usb_add_function(c, &ss->function);
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if (status)
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kfree(ss);
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return status;
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}
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static int sourcesink_setup(struct usb_configuration *c,
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const struct usb_ctrlrequest *ctrl)
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{
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struct usb_request *req = c->cdev->req;
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int value = -EOPNOTSUPP;
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u16 w_index = le16_to_cpu(ctrl->wIndex);
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u16 w_value = le16_to_cpu(ctrl->wValue);
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u16 w_length = le16_to_cpu(ctrl->wLength);
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/* composite driver infrastructure handles everything except
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* the two control test requests.
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*/
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switch (ctrl->bRequest) {
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/*
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* These are the same vendor-specific requests supported by
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* Intel's USB 2.0 compliance test devices. We exceed that
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* device spec by allowing multiple-packet requests.
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*
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* NOTE: the Control-OUT data stays in req->buf ... better
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* would be copying it into a scratch buffer, so that other
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* requests may safely intervene.
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*/
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case 0x5b: /* control WRITE test -- fill the buffer */
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if (ctrl->bRequestType != (USB_DIR_OUT|USB_TYPE_VENDOR))
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goto unknown;
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if (w_value || w_index)
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break;
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/* just read that many bytes into the buffer */
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if (w_length > req->length)
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break;
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value = w_length;
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break;
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case 0x5c: /* control READ test -- return the buffer */
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if (ctrl->bRequestType != (USB_DIR_IN|USB_TYPE_VENDOR))
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goto unknown;
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if (w_value || w_index)
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break;
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/* expect those bytes are still in the buffer; send back */
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if (w_length > req->length)
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break;
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value = w_length;
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break;
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default:
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unknown:
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VDBG(c->cdev,
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"unknown control req%02x.%02x v%04x i%04x l%d\n",
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ctrl->bRequestType, ctrl->bRequest,
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w_value, w_index, w_length);
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}
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/* respond with data transfer or status phase? */
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if (value >= 0) {
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VDBG(c->cdev, "source/sink req%02x.%02x v%04x i%04x l%d\n",
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ctrl->bRequestType, ctrl->bRequest,
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w_value, w_index, w_length);
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req->zero = 0;
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req->length = value;
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value = usb_ep_queue(c->cdev->gadget->ep0, req, GFP_ATOMIC);
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if (value < 0)
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ERROR(c->cdev, "source/sinkc response, err %d\n",
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value);
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}
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/* device either stalls (value < 0) or reports success */
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return value;
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}
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static struct usb_configuration sourcesink_driver = {
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.label = "source/sink",
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.strings = sourcesink_strings,
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.bind = sourcesink_bind_config,
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.setup = sourcesink_setup,
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.bConfigurationValue = 3,
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.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
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/* .iConfiguration = DYNAMIC */
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};
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/**
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* sourcesink_add - add a source/sink testing configuration to a device
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* @cdev: the device to support the configuration
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*/
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int __init sourcesink_add(struct usb_composite_dev *cdev, bool autoresume)
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{
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int id;
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/* allocate string ID(s) */
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id = usb_string_id(cdev);
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if (id < 0)
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return id;
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strings_sourcesink[0].id = id;
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source_sink_intf.iInterface = id;
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sourcesink_driver.iConfiguration = id;
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|
|
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/* support autoresume for remote wakeup testing */
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if (autoresume)
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sourcesink_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
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|
|
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/* support OTG systems */
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if (gadget_is_otg(cdev->gadget)) {
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sourcesink_driver.descriptors = otg_desc;
|
|
sourcesink_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
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}
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|
|
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return usb_add_config(cdev, &sourcesink_driver);
|
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}
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