mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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USB: ffs-test: FunctionFS testing program
This adds an example user-space FunctionFS driver which implements a source/sink interface used for testing. Signed-off-by: Michal Nazarewicz <m.nazarewicz@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Michal Nazarewicz
Greg Kroah-Hartman
parent
c6c5600851
commit
93f2aa4ddd
554
tools/usb/ffs-test.c
Normal file
554
tools/usb/ffs-test.c
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@ -0,0 +1,554 @@
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/*
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* ffs-test.c.c -- user mode filesystem api for usb composite function
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*
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* Copyright (C) 2010 Samsung Electronics
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* Author: Michal Nazarewicz <m.nazarewicz@samsung.com>
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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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/* $(CROSS_COMPILE)cc -Wall -Wextra -g -o ffs-test ffs-test.c -lpthread */
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#define _BSD_SOURCE /* for endian.h */
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#include <endian.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <pthread.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <linux/usb/functionfs.h>
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/******************** Little Endian Handling ********************************/
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#define cpu_to_le16(x) htole16(x)
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#define cpu_to_le32(x) htole32(x)
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#define le32_to_cpu(x) le32toh(x)
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#define le16_to_cpu(x) le16toh(x)
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static inline __u16 get_unaligned_le16(const void *_ptr)
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{
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const __u8 *ptr = _ptr;
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return ptr[0] | (ptr[1] << 8);
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}
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static inline __u32 get_unaligned_le32(const void *_ptr)
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{
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const __u8 *ptr = _ptr;
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return ptr[0] | (ptr[1] << 8) | (ptr[2] << 16) | (ptr[3] << 24);
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}
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static inline void put_unaligned_le16(__u16 val, void *_ptr)
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{
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__u8 *ptr = _ptr;
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*ptr++ = val;
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*ptr++ = val >> 8;
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}
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static inline void put_unaligned_le32(__u32 val, void *_ptr)
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{
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__u8 *ptr = _ptr;
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*ptr++ = val;
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*ptr++ = val >> 8;
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*ptr++ = val >> 16;
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*ptr++ = val >> 24;
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}
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/******************** Messages and Errors ***********************************/
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static const char argv0[] = "ffs-test";
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static unsigned verbosity = 7;
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static void _msg(unsigned level, const char *fmt, ...)
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{
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if (level < 2)
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level = 2;
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else if (level > 7)
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level = 7;
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if (level <= verbosity) {
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static const char levels[8][6] = {
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[2] = "crit:",
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[3] = "err: ",
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[4] = "warn:",
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[5] = "note:",
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[6] = "info:",
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[7] = "dbg: "
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};
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int _errno = errno;
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va_list ap;
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fprintf(stderr, "%s: %s ", argv0, levels[level]);
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va_start(ap, fmt);
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vfprintf(stderr, fmt, ap);
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va_end(ap);
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if (fmt[strlen(fmt) - 1] != '\n') {
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char buffer[128];
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strerror_r(_errno, buffer, sizeof buffer);
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fprintf(stderr, ": (-%d) %s\n", _errno, buffer);
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}
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fflush(stderr);
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}
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}
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#define die(...) (_msg(2, __VA_ARGS__), exit(1))
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#define err(...) _msg(3, __VA_ARGS__)
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#define warn(...) _msg(4, __VA_ARGS__)
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#define note(...) _msg(5, __VA_ARGS__)
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#define info(...) _msg(6, __VA_ARGS__)
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#define debug(...) _msg(7, __VA_ARGS__)
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#define die_on(cond, ...) do { \
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if (cond) \
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die(__VA_ARGS__); \
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} while (0)
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/******************** Descriptors and Strings *******************************/
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static const struct {
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struct usb_functionfs_descs_head header;
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struct {
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struct usb_interface_descriptor intf;
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struct usb_endpoint_descriptor_no_audio sink;
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struct usb_endpoint_descriptor_no_audio source;
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} __attribute__((packed)) fs_descs, hs_descs;
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} __attribute__((packed)) descriptors = {
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.header = {
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.magic = cpu_to_le32(FUNCTIONFS_DESCRIPTORS_MAGIC),
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.length = cpu_to_le32(sizeof descriptors),
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.fs_count = 3,
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.hs_count = 3,
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},
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.fs_descs = {
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.intf = {
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.bLength = sizeof descriptors.fs_descs.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 = 1,
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},
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.sink = {
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.bLength = sizeof descriptors.fs_descs.sink,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = 1 | USB_DIR_IN,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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/* .wMaxPacketSize = autoconfiguration (kernel) */
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},
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.source = {
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.bLength = sizeof descriptors.fs_descs.source,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = 2 | USB_DIR_OUT,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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/* .wMaxPacketSize = autoconfiguration (kernel) */
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},
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},
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.hs_descs = {
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.intf = {
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.bLength = sizeof descriptors.fs_descs.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 = 1,
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},
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.sink = {
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.bLength = sizeof descriptors.hs_descs.sink,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = 1 | USB_DIR_IN,
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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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.source = {
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.bLength = sizeof descriptors.hs_descs.source,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = 2 | USB_DIR_OUT,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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.wMaxPacketSize = cpu_to_le16(512),
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.bInterval = 1, /* NAK every 1 uframe */
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},
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},
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};
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#define STR_INTERFACE_ "Source/Sink"
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static const struct {
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struct usb_functionfs_strings_head header;
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struct {
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__le16 code;
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const char str1[sizeof STR_INTERFACE_];
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} __attribute__((packed)) lang0;
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} __attribute__((packed)) strings = {
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.header = {
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.magic = cpu_to_le32(FUNCTIONFS_STRINGS_MAGIC),
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.length = cpu_to_le32(sizeof strings),
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.str_count = cpu_to_le32(1),
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.lang_count = cpu_to_le32(1),
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},
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.lang0 = {
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cpu_to_le16(0x0409), /* en-us */
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STR_INTERFACE_,
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},
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};
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#define STR_INTERFACE strings.lang0.str1
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/******************** Files and Threads Handling ****************************/
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struct thread;
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static ssize_t read_wrap(struct thread *t, void *buf, size_t nbytes);
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static ssize_t write_wrap(struct thread *t, const void *buf, size_t nbytes);
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static ssize_t ep0_consume(struct thread *t, const void *buf, size_t nbytes);
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static ssize_t fill_in_buf(struct thread *t, void *buf, size_t nbytes);
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static ssize_t empty_out_buf(struct thread *t, const void *buf, size_t nbytes);
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static struct thread {
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const char *const filename;
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size_t buf_size;
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ssize_t (*in)(struct thread *, void *, size_t);
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const char *const in_name;
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ssize_t (*out)(struct thread *, const void *, size_t);
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const char *const out_name;
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int fd;
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pthread_t id;
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void *buf;
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ssize_t status;
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} threads[] = {
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{
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"ep0", 4 * sizeof(struct usb_functionfs_event),
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read_wrap, NULL,
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ep0_consume, "<consume>",
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0, 0, NULL, 0
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},
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{
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"ep1", 8 * 1024,
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fill_in_buf, "<in>",
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write_wrap, NULL,
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0, 0, NULL, 0
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},
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{
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"ep2", 8 * 1024,
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read_wrap, NULL,
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empty_out_buf, "<out>",
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0, 0, NULL, 0
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},
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};
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static void init_thread(struct thread *t)
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{
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t->buf = malloc(t->buf_size);
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die_on(!t->buf, "malloc");
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t->fd = open(t->filename, O_RDWR);
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die_on(t->fd < 0, "%s", t->filename);
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}
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static void cleanup_thread(void *arg)
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{
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struct thread *t = arg;
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int ret, fd;
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fd = t->fd;
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if (t->fd < 0)
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return;
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t->fd = -1;
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/* test the FIFO ioctls (non-ep0 code paths) */
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if (t != threads) {
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ret = ioctl(fd, FUNCTIONFS_FIFO_STATUS);
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if (ret < 0) {
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/* ENODEV reported after disconnect */
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if (errno != ENODEV)
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err("%s: get fifo status", t->filename);
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} else if (ret) {
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warn("%s: unclaimed = %d\n", t->filename, ret);
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if (ioctl(fd, FUNCTIONFS_FIFO_FLUSH) < 0)
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err("%s: fifo flush", t->filename);
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}
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}
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if (close(fd) < 0)
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err("%s: close", t->filename);
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free(t->buf);
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t->buf = NULL;
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}
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static void *start_thread_helper(void *arg)
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{
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const char *name, *op, *in_name, *out_name;
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struct thread *t = arg;
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ssize_t ret;
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info("%s: starts\n", t->filename);
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in_name = t->in_name ? t->in_name : t->filename;
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out_name = t->out_name ? t->out_name : t->filename;
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pthread_cleanup_push(cleanup_thread, arg);
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for (;;) {
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pthread_testcancel();
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ret = t->in(t, t->buf, t->buf_size);
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if (ret > 0) {
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ret = t->out(t, t->buf, t->buf_size);
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name = out_name;
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op = "write";
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} else {
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name = in_name;
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op = "read";
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}
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if (ret > 0) {
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/* nop */
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} else if (!ret) {
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debug("%s: %s: EOF", name, op);
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break;
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} else if (errno == EINTR || errno == EAGAIN) {
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debug("%s: %s", name, op);
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} else {
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warn("%s: %s", name, op);
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break;
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}
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}
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pthread_cleanup_pop(1);
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t->status = ret;
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info("%s: ends\n", t->filename);
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return NULL;
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}
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static void start_thread(struct thread *t)
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{
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debug("%s: starting\n", t->filename);
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die_on(pthread_create(&t->id, NULL, start_thread_helper, t) < 0,
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"pthread_create(%s)", t->filename);
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}
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static void join_thread(struct thread *t)
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{
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int ret = pthread_join(t->id, NULL);
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if (ret < 0)
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err("%s: joining thread", t->filename);
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else
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debug("%s: joined\n", t->filename);
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}
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static ssize_t read_wrap(struct thread *t, void *buf, size_t nbytes)
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{
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return read(t->fd, buf, nbytes);
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}
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static ssize_t write_wrap(struct thread *t, const void *buf, size_t nbytes)
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{
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return write(t->fd, buf, nbytes);
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}
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/******************** Empty/Fill buffer routines ****************************/
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/* 0 -- stream of zeros, 1 -- i % 63, 2 -- pipe */
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enum pattern { PAT_ZERO, PAT_SEQ, PAT_PIPE };
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static enum pattern pattern;
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static ssize_t
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fill_in_buf(struct thread *ignore, void *buf, size_t nbytes)
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{
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size_t i;
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__u8 *p;
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(void)ignore;
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switch (pattern) {
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case PAT_ZERO:
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memset(buf, 0, nbytes);
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break;
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case PAT_SEQ:
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for (p = buf, i = 0; i < nbytes; ++i, ++p)
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*p = i % 63;
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break;
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case PAT_PIPE:
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return fread(buf, 1, nbytes, stdin);
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}
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return nbytes;
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}
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static ssize_t
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empty_out_buf(struct thread *ignore, const void *buf, size_t nbytes)
|
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{
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const __u8 *p;
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__u8 expected;
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ssize_t ret;
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size_t len;
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(void)ignore;
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switch (pattern) {
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case PAT_ZERO:
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expected = 0;
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for (p = buf, len = 0; len < nbytes; ++p, ++len)
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if (*p)
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goto invalid;
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break;
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case PAT_SEQ:
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for (p = buf, len = 0; len < nbytes; ++p, ++len)
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if (*p != len % 63) {
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expected = len % 63;
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goto invalid;
|
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}
|
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break;
|
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|
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case PAT_PIPE:
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ret = fwrite(buf, nbytes, 1, stdout);
|
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if (ret > 0)
|
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fflush(stdout);
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break;
|
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|
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invalid:
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err("bad OUT byte %zd, expected %02x got %02x\n",
|
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len, expected, *p);
|
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for (p = buf, len = 0; len < nbytes; ++p, ++len) {
|
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if (0 == (len % 32))
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fprintf(stderr, "%4d:", len);
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fprintf(stderr, " %02x", *p);
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if (31 == (len % 32))
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fprintf(stderr, "\n");
|
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}
|
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fflush(stderr);
|
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errno = EILSEQ;
|
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return -1;
|
||||
}
|
||||
|
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return len;
|
||||
}
|
||||
|
||||
|
||||
/******************** Endpoints routines ************************************/
|
||||
|
||||
static void handle_setup(const struct usb_ctrlrequest *setup)
|
||||
{
|
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printf("bRequestType = %d\n", setup->bRequestType);
|
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printf("bRequest = %d\n", setup->bRequest);
|
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printf("wValue = %d\n", le16_to_cpu(setup->wValue));
|
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printf("wIndex = %d\n", le16_to_cpu(setup->wIndex));
|
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printf("wLength = %d\n", le16_to_cpu(setup->wLength));
|
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}
|
||||
|
||||
static ssize_t
|
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ep0_consume(struct thread *ignore, const void *buf, size_t nbytes)
|
||||
{
|
||||
static const char *const names[] = {
|
||||
[FUNCTIONFS_BIND] = "BIND",
|
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[FUNCTIONFS_UNBIND] = "UNBIND",
|
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[FUNCTIONFS_ENABLE] = "ENABLE",
|
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[FUNCTIONFS_DISABLE] = "DISABLE",
|
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[FUNCTIONFS_SETUP] = "SETUP",
|
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[FUNCTIONFS_SUSPEND] = "SUSPEND",
|
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[FUNCTIONFS_RESUME] = "RESUME",
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};
|
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|
||||
const struct usb_functionfs_event *event = buf;
|
||||
size_t n;
|
||||
|
||||
(void)ignore;
|
||||
|
||||
for (n = nbytes / sizeof *event; n; --n, ++event)
|
||||
switch (event->type) {
|
||||
case FUNCTIONFS_BIND:
|
||||
case FUNCTIONFS_UNBIND:
|
||||
case FUNCTIONFS_ENABLE:
|
||||
case FUNCTIONFS_DISABLE:
|
||||
case FUNCTIONFS_SETUP:
|
||||
case FUNCTIONFS_SUSPEND:
|
||||
case FUNCTIONFS_RESUME:
|
||||
printf("Event %s\n", names[event->type]);
|
||||
if (event->type == FUNCTIONFS_SETUP)
|
||||
handle_setup(&event->u.setup);
|
||||
break;
|
||||
|
||||
default:
|
||||
printf("Event %03u (unknown)\n", event->type);
|
||||
}
|
||||
|
||||
return nbytes;
|
||||
}
|
||||
|
||||
static void ep0_init(struct thread *t)
|
||||
{
|
||||
ssize_t ret;
|
||||
|
||||
info("%s: writing descriptors\n", t->filename);
|
||||
ret = write(t->fd, &descriptors, sizeof descriptors);
|
||||
die_on(ret < 0, "%s: write: descriptors", t->filename);
|
||||
|
||||
info("%s: writing strings\n", t->filename);
|
||||
ret = write(t->fd, &strings, sizeof strings);
|
||||
die_on(ret < 0, "%s: write: strings", t->filename);
|
||||
}
|
||||
|
||||
|
||||
/******************** Main **************************************************/
|
||||
|
||||
int main(void)
|
||||
{
|
||||
unsigned i;
|
||||
|
||||
/* XXX TODO: Argument parsing missing */
|
||||
|
||||
init_thread(threads);
|
||||
ep0_init(threads);
|
||||
|
||||
for (i = 1; i < sizeof threads / sizeof *threads; ++i)
|
||||
init_thread(threads + i);
|
||||
|
||||
for (i = 1; i < sizeof threads / sizeof *threads; ++i)
|
||||
start_thread(threads + i);
|
||||
|
||||
start_thread_helper(threads);
|
||||
|
||||
for (i = 1; i < sizeof threads / sizeof *threads; ++i)
|
||||
join_thread(threads + i);
|
||||
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user