fuquan/allwinner_a64
1
1
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

upload android base code part6

Browse source
This commit is contained in:
August 2018-08-08 17:48:24 +08:00
parent 421e214c7d
commit 4e516ec6ed
35396 changed files with 9188716 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

39
android/system/core/libusbhost/Android.bp Normal file
View file

@ -0,0 +1,39 @@
//
// Copyright (C) 2010 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
cc_library {
name: "libusbhost",
vendor_available: true,
vndk: {
enabled: true,
},
host_supported: true,
srcs: ["usbhost.c"],
cflags: ["-Werror"],
export_include_dirs: ["include"],
target: {
android: {
cflags: [
"-g",
"-DUSE_LIBLOG",
],
shared_libs: ["liblog"],
},
darwin: {
enabled: false,
},
},
}

247
android/system/core/libusbhost/include/usbhost/usbhost.h Normal file
View file

@ -0,0 +1,247 @@
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __USB_HOST_H
#define __USB_HOST_H
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
#include <linux/version.h>
#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 20)
#include <linux/usb/ch9.h>
#else
#include <linux/usb_ch9.h>
#endif
struct usb_host_context;
struct usb_endpoint_descriptor;
struct usb_descriptor_iter {
unsigned char* config;
unsigned char* config_end;
unsigned char* curr_desc;
};
struct usb_request
{
struct usb_device *dev;
void* buffer;
int buffer_length;
int actual_length;
int max_packet_size;
void *private_data; /* struct usbdevfs_urb* */
int endpoint;
void *client_data; /* free for use by client */
};
/* Callback for notification when new USB devices are attached.
* Return true to exit from usb_host_run.
*/
typedef int (* usb_device_added_cb)(const char *dev_name, void *client_data);
/* Callback for notification when USB devices are removed.
* Return true to exit from usb_host_run.
*/
typedef int (* usb_device_removed_cb)(const char *dev_name, void *client_data);
/* Callback indicating that initial device discovery is done.
* Return true to exit from usb_host_run.
*/
typedef int (* usb_discovery_done_cb)(void *client_data);
/* Call this to initialize the USB host library. */
struct usb_host_context *usb_host_init(void);
/* Call this to cleanup the USB host library. */
void usb_host_cleanup(struct usb_host_context *context);
/* Call this to get the inotify file descriptor. */
int usb_host_get_fd(struct usb_host_context *context);
/* Call this to initialize the usb host context. */
int usb_host_load(struct usb_host_context *context,
usb_device_added_cb added_cb,
usb_device_removed_cb removed_cb,
usb_discovery_done_cb discovery_done_cb,
void *client_data);
/* Call this to read and handle occuring usb event. */
int usb_host_read_event(struct usb_host_context *context);
/* Call this to monitor the USB bus for new and removed devices.
* This is intended to be called from a dedicated thread,
* as it will not return until one of the callbacks returns true.
* added_cb will be called immediately for each existing USB device,
* and subsequently each time a new device is added.
* removed_cb is called when USB devices are removed from the bus.
* discovery_done_cb is called after the initial discovery of already
* connected devices is complete.
*/
void usb_host_run(struct usb_host_context *context,
usb_device_added_cb added_cb,
usb_device_removed_cb removed_cb,
usb_discovery_done_cb discovery_done_cb,
void *client_data);
/* Creates a usb_device object for a USB device */
struct usb_device *usb_device_open(const char *dev_name);
/* Releases all resources associated with the USB device */
void usb_device_close(struct usb_device *device);
/* Creates a usb_device object for already open USB device */
struct usb_device *usb_device_new(const char *dev_name, int fd);
/* Returns the file descriptor for the usb_device */
int usb_device_get_fd(struct usb_device *device);
/* Returns the name for the USB device, which is the same as
* the dev_name passed to usb_device_open()
*/
const char* usb_device_get_name(struct usb_device *device);
/* Returns a unique ID for the device.
*Currently this is generated from the dev_name path.
*/
int usb_device_get_unique_id(struct usb_device *device);
/* Returns a unique ID for the device name.
* Currently this is generated from the device path.
*/
int usb_device_get_unique_id_from_name(const char* name);
/* Returns the device name for the unique ID.
* Call free() to deallocate the returned string */
char* usb_device_get_name_from_unique_id(int id);
/* Returns the USB vendor ID from the device descriptor for the USB device */
uint16_t usb_device_get_vendor_id(struct usb_device *device);
/* Returns the USB product ID from the device descriptor for the USB device */
uint16_t usb_device_get_product_id(struct usb_device *device);
const struct usb_device_descriptor* usb_device_get_device_descriptor(struct usb_device *device);
/* Returns a USB descriptor string for the given string ID.
* Used to implement usb_device_get_manufacturer_name,
* usb_device_get_product_name and usb_device_get_serial.
* Call free() to free the result when you are done with it.
*/
char* usb_device_get_string(struct usb_device *device, int id, int timeout);
/* Returns the manufacturer name for the USB device.
* Call free() to free the result when you are done with it.
*/
char* usb_device_get_manufacturer_name(struct usb_device *device, int timeout);
/* Returns the product name for the USB device.
* Call free() to free the result when you are done with it.
*/
char* usb_device_get_product_name(struct usb_device *device, int timeout);
/* Returns the version number for the USB device.
*/
int usb_device_get_version(struct usb_device *device);
/* Returns the USB serial number for the USB device.
* Call free() to free the result when you are done with it.
*/
char* usb_device_get_serial(struct usb_device *device, int timeout);
/* Returns true if we have write access to the USB device,
* and false if we only have access to the USB device configuration.
*/
int usb_device_is_writeable(struct usb_device *device);
/* Initializes a usb_descriptor_iter, which can be used to iterate through all
* the USB descriptors for a USB device.
*/
void usb_descriptor_iter_init(struct usb_device *device, struct usb_descriptor_iter *iter);
/* Returns the next USB descriptor for a device, or NULL if we have reached the
* end of the list.
*/
struct usb_descriptor_header *usb_descriptor_iter_next(struct usb_descriptor_iter *iter);
/* Claims the specified interface of a USB device */
int usb_device_claim_interface(struct usb_device *device, unsigned int interface);
/* Releases the specified interface of a USB device */
int usb_device_release_interface(struct usb_device *device, unsigned int interface);
/* Requests the kernel to connect or disconnect its driver for the specified interface.
* This can be used to ask the kernel to disconnect its driver for a device
* so usb_device_claim_interface can claim it instead.
*/
int usb_device_connect_kernel_driver(struct usb_device *device,
unsigned int interface, int connect);
/* Sets the current configuration for the device to the specified configuration */
int usb_device_set_configuration(struct usb_device *device, int configuration);
/* Sets the specified interface of a USB device */
int usb_device_set_interface(struct usb_device *device, unsigned int interface,
unsigned int alt_setting);
/* Sends a control message to the specified device on endpoint zero */
int usb_device_control_transfer(struct usb_device *device,
int requestType,
int request,
int value,
int index,
void* buffer,
int length,
unsigned int timeout);
/* Reads or writes on a bulk endpoint.
* Returns number of bytes transferred, or negative value for error.
*/
int usb_device_bulk_transfer(struct usb_device *device,
int endpoint,
void* buffer,
unsigned int length,
unsigned int timeout);
/** Reset USB bus for the device */
int usb_device_reset(struct usb_device *device);
/* Creates a new usb_request. */
struct usb_request *usb_request_new(struct usb_device *dev,
const struct usb_endpoint_descriptor *ep_desc);
/* Releases all resources associated with the request */
void usb_request_free(struct usb_request *req);
/* Submits a read or write request on the specified device */
int usb_request_queue(struct usb_request *req);
/* Waits for the results of a previous usb_request_queue operation. timeoutMillis == -1 requests
* to wait forever.
* Returns a usb_request, or NULL for error.
*/
struct usb_request *usb_request_wait(struct usb_device *dev, int timeoutMillis);
/* Cancels a pending usb_request_queue() operation. */
int usb_request_cancel(struct usb_request *req);
#ifdef __cplusplus
}
#endif
#endif /* __USB_HOST_H */

729
android/system/core/libusbhost/usbhost.c Normal file
View file

@ -0,0 +1,729 @@
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
// #define DEBUG 1
#if DEBUG
#ifdef USE_LIBLOG
#define LOG_TAG "usbhost"
#include "log/log.h"
#define D ALOGD
#else
#define D printf
#endif
#else
#define D(...)
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <stddef.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/inotify.h>
#include <dirent.h>
#include <fcntl.h>
#include <errno.h>
#include <ctype.h>
#include <poll.h>
#include <pthread.h>
#include <linux/usbdevice_fs.h>
#include <asm/byteorder.h>
#include "usbhost/usbhost.h"
#define DEV_DIR "/dev"
#define DEV_BUS_DIR DEV_DIR "/bus"
#define USB_FS_DIR DEV_BUS_DIR "/usb"
#define USB_FS_ID_SCANNER USB_FS_DIR "/%d/%d"
#define USB_FS_ID_FORMAT USB_FS_DIR "/%03d/%03d"
// Some devices fail to send string descriptors if we attempt reading > 255 bytes
#define MAX_STRING_DESCRIPTOR_LENGTH 255
// From drivers/usb/core/devio.c
// I don't know why this isn't in a kernel header
#define MAX_USBFS_BUFFER_SIZE 16384
#define MAX_USBFS_WD_COUNT 10
struct usb_host_context {
int fd;
usb_device_added_cb cb_added;
usb_device_removed_cb cb_removed;
void *data;
int wds[MAX_USBFS_WD_COUNT];
int wdd;
int wddbus;
};
struct usb_device {
char dev_name[64];
unsigned char desc[4096];
int desc_length;
int fd;
int writeable;
};
static inline int badname(const char *name)
{
while(*name) {
if(!isdigit(*name++)) return 1;
}
return 0;
}
static int find_existing_devices_bus(char *busname,
usb_device_added_cb added_cb,
void *client_data)
{
char devname[32];
DIR *devdir;
struct dirent *de;
int done = 0;
devdir = opendir(busname);
if(devdir == 0) return 0;
while ((de = readdir(devdir)) && !done) {
if(badname(de->d_name)) continue;
snprintf(devname, sizeof(devname), "%s/%s", busname, de->d_name);
done = added_cb(devname, client_data);
} // end of devdir while
closedir(devdir);
return done;
}
/* returns true if one of the callbacks indicates we are done */
static int find_existing_devices(usb_device_added_cb added_cb,
void *client_data)
{
char busname[32];
DIR *busdir;
struct dirent *de;
int done = 0;
busdir = opendir(USB_FS_DIR);
if(busdir == 0) return 0;
while ((de = readdir(busdir)) != 0 && !done) {
if(badname(de->d_name)) continue;
snprintf(busname, sizeof(busname), USB_FS_DIR "/%s", de->d_name);
done = find_existing_devices_bus(busname, added_cb,
client_data);
} //end of busdir while
closedir(busdir);
return done;
}
static void watch_existing_subdirs(struct usb_host_context *context,
int *wds, int wd_count)
{
char path[100];
int i, ret;
wds[0] = inotify_add_watch(context->fd, USB_FS_DIR, IN_CREATE | IN_DELETE);
if (wds[0] < 0)
return;
/* watch existing subdirectories of USB_FS_DIR */
for (i = 1; i < wd_count; i++) {
snprintf(path, sizeof(path), USB_FS_DIR "/%03d", i);
ret = inotify_add_watch(context->fd, path, IN_CREATE | IN_DELETE);
if (ret >= 0)
wds[i] = ret;
}
}
struct usb_host_context *usb_host_init()
{
struct usb_host_context *context = calloc(1, sizeof(struct usb_host_context));
if (!context) {
fprintf(stderr, "out of memory in usb_host_context\n");
return NULL;
}
context->fd = inotify_init();
if (context->fd < 0) {
fprintf(stderr, "inotify_init failed\n");
free(context);
return NULL;
}
return context;
}
void usb_host_cleanup(struct usb_host_context *context)
{
close(context->fd);
free(context);
}
int usb_host_get_fd(struct usb_host_context *context)
{
return context->fd;
} /* usb_host_get_fd() */
int usb_host_load(struct usb_host_context *context,
usb_device_added_cb added_cb,
usb_device_removed_cb removed_cb,
usb_discovery_done_cb discovery_done_cb,
void *client_data)
{
int done = 0;
int i;
context->cb_added = added_cb;
context->cb_removed = removed_cb;
context->data = client_data;
D("Created device discovery thread\n");
/* watch for files added and deleted within USB_FS_DIR */
context->wddbus = -1;
for (i = 0; i < MAX_USBFS_WD_COUNT; i++)
context->wds[i] = -1;
/* watch the root for new subdirectories */
context->wdd = inotify_add_watch(context->fd, DEV_DIR, IN_CREATE | IN_DELETE);
if (context->wdd < 0) {
fprintf(stderr, "inotify_add_watch failed\n");
if (discovery_done_cb)
discovery_done_cb(client_data);
return done;
}
watch_existing_subdirs(context, context->wds, MAX_USBFS_WD_COUNT);
/* check for existing devices first, after we have inotify set up */
done = find_existing_devices(added_cb, client_data);
if (discovery_done_cb)
done |= discovery_done_cb(client_data);
return done;
} /* usb_host_load() */
int usb_host_read_event(struct usb_host_context *context)
{
struct inotify_event* event;
char event_buf[512];
char path[100];
int i, ret, done = 0;
int offset = 0;
int wd;
ret = read(context->fd, event_buf, sizeof(event_buf));
if (ret >= (int)sizeof(struct inotify_event)) {
while (offset < ret && !done) {
event = (struct inotify_event*)&event_buf[offset];
done = 0;
wd = event->wd;
if (wd == context->wdd) {
if ((event->mask & IN_CREATE) && !strcmp(event->name, "bus")) {
context->wddbus = inotify_add_watch(context->fd, DEV_BUS_DIR, IN_CREATE | IN_DELETE);
if (context->wddbus < 0) {
done = 1;
} else {
watch_existing_subdirs(context, context->wds, MAX_USBFS_WD_COUNT);
done = find_existing_devices(context->cb_added, context->data);
}
}
} else if (wd == context->wddbus) {
if ((event->mask & IN_CREATE) && !strcmp(event->name, "usb")) {
watch_existing_subdirs(context, context->wds, MAX_USBFS_WD_COUNT);
done = find_existing_devices(context->cb_added, context->data);
} else if ((event->mask & IN_DELETE) && !strcmp(event->name, "usb")) {
for (i = 0; i < MAX_USBFS_WD_COUNT; i++) {
if (context->wds[i] >= 0) {
inotify_rm_watch(context->fd, context->wds[i]);
context->wds[i] = -1;
}
}
}
} else if (wd == context->wds[0]) {
i = atoi(event->name);
snprintf(path, sizeof(path), USB_FS_DIR "/%s", event->name);
D("%s subdirectory %s: index: %d\n", (event->mask & IN_CREATE) ?
"new" : "gone", path, i);
if (i > 0 && i < MAX_USBFS_WD_COUNT) {
int local_ret = 0;
if (event->mask & IN_CREATE) {
local_ret = inotify_add_watch(context->fd, path,
IN_CREATE | IN_DELETE);
if (local_ret >= 0)
context->wds[i] = local_ret;
done = find_existing_devices_bus(path, context->cb_added,
context->data);
} else if (event->mask & IN_DELETE) {
inotify_rm_watch(context->fd, context->wds[i]);
context->wds[i] = -1;
}
}
} else {
for (i = 1; (i < MAX_USBFS_WD_COUNT) && !done; i++) {
if (wd == context->wds[i]) {
snprintf(path, sizeof(path), USB_FS_DIR "/%03d/%s", i, event->name);
if (event->mask == IN_CREATE) {
D("new device %s\n", path);
done = context->cb_added(path, context->data);
} else if (event->mask == IN_DELETE) {
D("gone device %s\n", path);
done = context->cb_removed(path, context->data);
}
}
}
}
offset += sizeof(struct inotify_event) + event->len;
}
}
return done;
} /* usb_host_read_event() */
void usb_host_run(struct usb_host_context *context,
usb_device_added_cb added_cb,
usb_device_removed_cb removed_cb,
usb_discovery_done_cb discovery_done_cb,
void *client_data)
{
int done;
done = usb_host_load(context, added_cb, removed_cb, discovery_done_cb, client_data);
while (!done) {
done = usb_host_read_event(context);
}
} /* usb_host_run() */
struct usb_device *usb_device_open(const char *dev_name)
{
int fd, did_retry = 0, writeable = 1;
D("usb_device_open %s\n", dev_name);
retry:
fd = open(dev_name, O_RDWR);
if (fd < 0) {
/* if we fail, see if have read-only access */
fd = open(dev_name, O_RDONLY);
D("usb_device_open open returned %d errno %d\n", fd, errno);
if (fd < 0 && (errno == EACCES || errno == ENOENT) && !did_retry) {
/* work around race condition between inotify and permissions management */
sleep(1);
did_retry = 1;
goto retry;
}
if (fd < 0)
return NULL;
writeable = 0;
D("[ usb open read-only %s fd = %d]\n", dev_name, fd);
}
struct usb_device* result = usb_device_new(dev_name, fd);
if (result)
result->writeable = writeable;
return result;
}
void usb_device_close(struct usb_device *device)
{
close(device->fd);
free(device);
}
struct usb_device *usb_device_new(const char *dev_name, int fd)
{
struct usb_device *device = calloc(1, sizeof(struct usb_device));
int length;
D("usb_device_new %s fd: %d\n", dev_name, fd);
if (lseek(fd, 0, SEEK_SET) != 0)
goto failed;
length = read(fd, device->desc, sizeof(device->desc));
D("usb_device_new read returned %d errno %d\n", length, errno);
if (length < 0)
goto failed;
strncpy(device->dev_name, dev_name, sizeof(device->dev_name) - 1);
device->fd = fd;
device->desc_length = length;
// assume we are writeable, since usb_device_get_fd will only return writeable fds
device->writeable = 1;
return device;
failed:
close(fd);
free(device);
return NULL;
}
static int usb_device_reopen_writeable(struct usb_device *device)
{
if (device->writeable)
return 1;
int fd = open(device->dev_name, O_RDWR);
if (fd >= 0) {
close(device->fd);
device->fd = fd;
device->writeable = 1;
return 1;
}
D("usb_device_reopen_writeable failed errno %d\n", errno);
return 0;
}
int usb_device_get_fd(struct usb_device *device)
{
if (!usb_device_reopen_writeable(device))
return -1;
return device->fd;
}
const char* usb_device_get_name(struct usb_device *device)
{
return device->dev_name;
}
int usb_device_get_unique_id(struct usb_device *device)
{
int bus = 0, dev = 0;
sscanf(device->dev_name, USB_FS_ID_SCANNER, &bus, &dev);
return bus * 1000 + dev;
}
int usb_device_get_unique_id_from_name(const char* name)
{
int bus = 0, dev = 0;
sscanf(name, USB_FS_ID_SCANNER, &bus, &dev);
return bus * 1000 + dev;
}
char* usb_device_get_name_from_unique_id(int id)
{
int bus = id / 1000;
int dev = id % 1000;
char* result = (char *)calloc(1, strlen(USB_FS_ID_FORMAT));
snprintf(result, strlen(USB_FS_ID_FORMAT) - 1, USB_FS_ID_FORMAT, bus, dev);
return result;
}
uint16_t usb_device_get_vendor_id(struct usb_device *device)
{
struct usb_device_descriptor* desc = (struct usb_device_descriptor*)device->desc;
return __le16_to_cpu(desc->idVendor);
}
uint16_t usb_device_get_product_id(struct usb_device *device)
{
struct usb_device_descriptor* desc = (struct usb_device_descriptor*)device->desc;
return __le16_to_cpu(desc->idProduct);
}
const struct usb_device_descriptor* usb_device_get_device_descriptor(struct usb_device *device)
{
return (struct usb_device_descriptor*)device->desc;
}
char* usb_device_get_string(struct usb_device *device, int id, int timeout)
{
char string[256];
__u16 buffer[MAX_STRING_DESCRIPTOR_LENGTH / sizeof(__u16)];
__u16 languages[MAX_STRING_DESCRIPTOR_LENGTH / sizeof(__u16)];
int i, result;
int languageCount = 0;
if (id == 0) return NULL;
string[0] = 0;
memset(languages, 0, sizeof(languages));
// read list of supported languages
result = usb_device_control_transfer(device,
USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE, USB_REQ_GET_DESCRIPTOR,
(USB_DT_STRING << 8) | 0, 0, languages, sizeof(languages),
timeout);
if (result > 0)
languageCount = (result - 2) / 2;
for (i = 1; i <= languageCount; i++) {
memset(buffer, 0, sizeof(buffer));
result = usb_device_control_transfer(device,
USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE, USB_REQ_GET_DESCRIPTOR,
(USB_DT_STRING << 8) | id, languages[i], buffer, sizeof(buffer),
timeout);
if (result > 0) {
int i;
// skip first word, and copy the rest to the string, changing shorts to bytes.
result /= 2;
for (i = 1; i < result; i++)
string[i - 1] = buffer[i];
string[i - 1] = 0;
return strdup(string);
}
}
return NULL;
}
char* usb_device_get_manufacturer_name(struct usb_device *device, int timeout)
{
struct usb_device_descriptor *desc = (struct usb_device_descriptor *)device->desc;
return usb_device_get_string(device, desc->iManufacturer, timeout);
}
char* usb_device_get_product_name(struct usb_device *device, int timeout)
{
struct usb_device_descriptor *desc = (struct usb_device_descriptor *)device->desc;
return usb_device_get_string(device, desc->iProduct, timeout);
}
int usb_device_get_version(struct usb_device *device)
{
struct usb_device_descriptor *desc = (struct usb_device_descriptor *)device->desc;
return desc->bcdUSB;
}
char* usb_device_get_serial(struct usb_device *device, int timeout)
{
struct usb_device_descriptor *desc = (struct usb_device_descriptor *)device->desc;
return usb_device_get_string(device, desc->iSerialNumber, timeout);
}
int usb_device_is_writeable(struct usb_device *device)
{
return device->writeable;
}
void usb_descriptor_iter_init(struct usb_device *device, struct usb_descriptor_iter *iter)
{
iter->config = device->desc;
iter->config_end = device->desc + device->desc_length;
iter->curr_desc = device->desc;
}
struct usb_descriptor_header *usb_descriptor_iter_next(struct usb_descriptor_iter *iter)
{
struct usb_descriptor_header* next;
if (iter->curr_desc >= iter->config_end)
return NULL;
next = (struct usb_descriptor_header*)iter->curr_desc;
iter->curr_desc += next->bLength;
return next;
}
int usb_device_claim_interface(struct usb_device *device, unsigned int interface)
{
return ioctl(device->fd, USBDEVFS_CLAIMINTERFACE, &interface);
}
int usb_device_release_interface(struct usb_device *device, unsigned int interface)
{
return ioctl(device->fd, USBDEVFS_RELEASEINTERFACE, &interface);
}
int usb_device_connect_kernel_driver(struct usb_device *device,
unsigned int interface, int connect)
{
struct usbdevfs_ioctl ctl;
ctl.ifno = interface;
ctl.ioctl_code = (connect ? USBDEVFS_CONNECT : USBDEVFS_DISCONNECT);
ctl.data = NULL;
return ioctl(device->fd, USBDEVFS_IOCTL, &ctl);
}
int usb_device_set_configuration(struct usb_device *device, int configuration)
{
return ioctl(device->fd, USBDEVFS_SETCONFIGURATION, &configuration);
}
int usb_device_set_interface(struct usb_device *device, unsigned int interface,
unsigned int alt_setting)
{
struct usbdevfs_setinterface ctl;
ctl.interface = interface;
ctl.altsetting = alt_setting;
return ioctl(device->fd, USBDEVFS_SETINTERFACE, &ctl);
}
int usb_device_control_transfer(struct usb_device *device,
int requestType,
int request,
int value,
int index,
void* buffer,
int length,
unsigned int timeout)
{
struct usbdevfs_ctrltransfer ctrl;
// this usually requires read/write permission
if (!usb_device_reopen_writeable(device))
return -1;
memset(&ctrl, 0, sizeof(ctrl));
ctrl.bRequestType = requestType;
ctrl.bRequest = request;
ctrl.wValue = value;
ctrl.wIndex = index;
ctrl.wLength = length;
ctrl.data = buffer;
ctrl.timeout = timeout;
return ioctl(device->fd, USBDEVFS_CONTROL, &ctrl);
}
int usb_device_bulk_transfer(struct usb_device *device,
int endpoint,
void* buffer,
unsigned int length,
unsigned int timeout)
{
struct usbdevfs_bulktransfer ctrl;
// need to limit request size to avoid EINVAL
if (length > MAX_USBFS_BUFFER_SIZE)
length = MAX_USBFS_BUFFER_SIZE;
memset(&ctrl, 0, sizeof(ctrl));
ctrl.ep = endpoint;
ctrl.len = length;
ctrl.data = buffer;
ctrl.timeout = timeout;
return ioctl(device->fd, USBDEVFS_BULK, &ctrl);
}
int usb_device_reset(struct usb_device *device)
{
return ioctl(device->fd, USBDEVFS_RESET);
}
struct usb_request *usb_request_new(struct usb_device *dev,
const struct usb_endpoint_descriptor *ep_desc)
{
struct usbdevfs_urb *urb = calloc(1, sizeof(struct usbdevfs_urb));
if (!urb)
return NULL;
if ((ep_desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK)
urb->type = USBDEVFS_URB_TYPE_BULK;
else if ((ep_desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)
urb->type = USBDEVFS_URB_TYPE_INTERRUPT;
else {
D("Unsupported endpoint type %d", ep_desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);
free(urb);
return NULL;
}
urb->endpoint = ep_desc->bEndpointAddress;
struct usb_request *req = calloc(1, sizeof(struct usb_request));
if (!req) {
free(urb);
return NULL;
}
req->dev = dev;
req->max_packet_size = __le16_to_cpu(ep_desc->wMaxPacketSize);
req->private_data = urb;
req->endpoint = urb->endpoint;
urb->usercontext = req;
return req;
}
void usb_request_free(struct usb_request *req)
{
free(req->private_data);
free(req);
}
int usb_request_queue(struct usb_request *req)
{
struct usbdevfs_urb *urb = (struct usbdevfs_urb*)req->private_data;
int res;
urb->status = -1;
urb->buffer = req->buffer;
// need to limit request size to avoid EINVAL
if (req->buffer_length > MAX_USBFS_BUFFER_SIZE)
urb->buffer_length = MAX_USBFS_BUFFER_SIZE;
else
urb->buffer_length = req->buffer_length;
do {
res = ioctl(req->dev->fd, USBDEVFS_SUBMITURB, urb);
} while((res < 0) && (errno == EINTR));
return res;
}
struct usb_request *usb_request_wait(struct usb_device *dev, int timeoutMillis)
{
// Poll until a request becomes available if there is a timeout
if (timeoutMillis > 0) {
struct pollfd p = {.fd = dev->fd, .events = POLLOUT, .revents = 0};
int res = poll(&p, 1, timeoutMillis);
if (res != 1 || p.revents != POLLOUT) {
D("[ poll - event %d, error %d]\n", p.revents, errno);
return NULL;
}
}
// Read the request. This should usually succeed as we polled before, but it can fail e.g. when
// two threads are reading usb requests at the same time and only a single request is available.
struct usbdevfs_urb *urb = NULL;
int res = TEMP_FAILURE_RETRY(ioctl(dev->fd, timeoutMillis == -1 ? USBDEVFS_REAPURB :
USBDEVFS_REAPURBNDELAY, &urb));
D("%s returned %d\n", timeoutMillis == -1 ? "USBDEVFS_REAPURB" : "USBDEVFS_REAPURBNDELAY", res);
if (res < 0) {
D("[ reap urb - error %d]\n", errno);
return NULL;
} else {
D("[ urb @%p status = %d, actual = %d ]\n", urb, urb->status, urb->actual_length);
struct usb_request *req = (struct usb_request*)urb->usercontext;
req->actual_length = urb->actual_length;
return req;
}
}
int usb_request_cancel(struct usb_request *req)
{
struct usbdevfs_urb *urb = ((struct usbdevfs_urb*)req->private_data);
return ioctl(req->dev->fd, USBDEVFS_DISCARDURB, urb);
}