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freebsd-dev/lib/libusb/libusb10.c
Hans Petter Selasky f7287225df LibUSB v1.0 API compiliance and bugfixes. 
- Use CLOCK_MONOTONIC instead of CLOCK_REALTIME, because CLOCK_MONOTONIC
does not wrap into negative in near future. This fixes any potential
problems using "pthread_cond_timedwait()".

- Fix a bug where the "libusb_wait_for_event()" function computes an
absolute timeout instead of a relative timeout. USB transfers do
not depend on this timeout value.

- Add dependency towards LibPthread to Makefile, because LibUSB v1.0
needs this library to function correctly.

MFC after:	1 week
2012-06-12 07:28:25 +00:00

1562 lines
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/* $FreeBSD$ */
/*-
* Copyright (c) 2009 Sylvestre Gallon. All rights reserved.
* Copyright (c) 2009 Hans Petter Selasky. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <sys/queue.h>
#include <assert.h>
#include <errno.h>
#include <poll.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#define libusb_device_handle libusb20_device
#include "libusb20.h"
#include "libusb20_desc.h"
#include "libusb20_int.h"
#include "libusb.h"
#include "libusb10.h"
static pthread_mutex_t default_context_lock = PTHREAD_MUTEX_INITIALIZER;
struct libusb_context *usbi_default_context = NULL;
/* Prototypes */
static struct libusb20_transfer *libusb10_get_transfer(struct libusb20_device *, uint8_t, uint8_t);
static int libusb10_get_buffsize(struct libusb20_device *, libusb_transfer *);
static int libusb10_convert_error(uint8_t status);
static void libusb10_complete_transfer(struct libusb20_transfer *, struct libusb_super_transfer *, int);
static void libusb10_isoc_proxy(struct libusb20_transfer *);
static void libusb10_bulk_intr_proxy(struct libusb20_transfer *);
static void libusb10_ctrl_proxy(struct libusb20_transfer *);
static void libusb10_submit_transfer_sub(struct libusb20_device *, uint8_t);
/* Library initialisation / deinitialisation */
void
libusb_set_debug(libusb_context *ctx, int level)
{
ctx = GET_CONTEXT(ctx);
if (ctx)
ctx->debug = level;
}
static void
libusb_set_nonblocking(int f)
{
int flags;
/*
* We ignore any failures in this function, hence the
* non-blocking flag is not critical to the operation of
* libUSB. We use F_GETFL and F_SETFL to be compatible with
* Linux.
*/
flags = fcntl(f, F_GETFL, NULL);
if (flags == -1)
return;
flags |= O_NONBLOCK;
fcntl(f, F_SETFL, flags);
}
int
libusb_init(libusb_context **context)
{
struct libusb_context *ctx;
pthread_condattr_t attr;
char *debug;
int ret;
ctx = malloc(sizeof(*ctx));
if (!ctx)
return (LIBUSB_ERROR_INVALID_PARAM);
memset(ctx, 0, sizeof(*ctx));
debug = getenv("LIBUSB_DEBUG");
if (debug != NULL) {
ctx->debug = atoi(debug);
if (ctx->debug != 0)
ctx->debug_fixed = 1;
}
TAILQ_INIT(&ctx->pollfds);
TAILQ_INIT(&ctx->tr_done);
if (pthread_mutex_init(&ctx->ctx_lock, NULL) != 0) {
free(ctx);
return (LIBUSB_ERROR_NO_MEM);
}
if (pthread_condattr_init(&attr) != 0) {
pthread_mutex_destroy(&ctx->ctx_lock);
free(ctx);
return (LIBUSB_ERROR_NO_MEM);
}
if (pthread_condattr_setclock(&attr, CLOCK_MONOTONIC) != 0) {
pthread_mutex_destroy(&ctx->ctx_lock);
pthread_condattr_destroy(&attr);
free(ctx);
return (LIBUSB_ERROR_OTHER);
}
if (pthread_cond_init(&ctx->ctx_cond, &attr) != 0) {
pthread_mutex_destroy(&ctx->ctx_lock);
pthread_condattr_destroy(&attr);
free(ctx);
return (LIBUSB_ERROR_NO_MEM);
}
pthread_condattr_destroy(&attr);
ctx->ctx_handler = NO_THREAD;
ret = pipe(ctx->ctrl_pipe);
if (ret < 0) {
pthread_mutex_destroy(&ctx->ctx_lock);
pthread_cond_destroy(&ctx->ctx_cond);
free(ctx);
return (LIBUSB_ERROR_OTHER);
}
/* set non-blocking mode on the control pipe to avoid deadlock */
libusb_set_nonblocking(ctx->ctrl_pipe[0]);
libusb_set_nonblocking(ctx->ctrl_pipe[1]);
libusb10_add_pollfd(ctx, &ctx->ctx_poll, NULL, ctx->ctrl_pipe[0], POLLIN);
pthread_mutex_lock(&default_context_lock);
if (usbi_default_context == NULL) {
usbi_default_context = ctx;
}
pthread_mutex_unlock(&default_context_lock);
if (context)
*context = ctx;
DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_init complete");
return (0);
}
void
libusb_exit(libusb_context *ctx)
{
ctx = GET_CONTEXT(ctx);
if (ctx == NULL)
return;
/* XXX cleanup devices */
libusb10_remove_pollfd(ctx, &ctx->ctx_poll);
close(ctx->ctrl_pipe[0]);
close(ctx->ctrl_pipe[1]);
pthread_mutex_destroy(&ctx->ctx_lock);
pthread_cond_destroy(&ctx->ctx_cond);
pthread_mutex_lock(&default_context_lock);
if (ctx == usbi_default_context) {
usbi_default_context = NULL;
}
pthread_mutex_unlock(&default_context_lock);
free(ctx);
}
/* Device handling and initialisation. */
ssize_t
libusb_get_device_list(libusb_context *ctx, libusb_device ***list)
{
struct libusb20_backend *usb_backend;
struct libusb20_device *pdev;
struct libusb_device *dev;
int i;
ctx = GET_CONTEXT(ctx);
if (ctx == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
if (list == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
usb_backend = libusb20_be_alloc_default();
if (usb_backend == NULL)
return (LIBUSB_ERROR_NO_MEM);
/* figure out how many USB devices are present */
pdev = NULL;
i = 0;
while ((pdev = libusb20_be_device_foreach(usb_backend, pdev)))
i++;
/* allocate device pointer list */
*list = malloc((i + 1) * sizeof(void *));
if (*list == NULL) {
libusb20_be_free(usb_backend);
return (LIBUSB_ERROR_NO_MEM);
}
/* create libusb v1.0 compliant devices */
i = 0;
while ((pdev = libusb20_be_device_foreach(usb_backend, NULL))) {
dev = malloc(sizeof(*dev));
if (dev == NULL) {
while (i != 0) {
libusb_unref_device((*list)[i - 1]);
i--;
}
free(*list);
*list = NULL;
libusb20_be_free(usb_backend);
return (LIBUSB_ERROR_NO_MEM);
}
/* get device into libUSB v1.0 list */
libusb20_be_dequeue_device(usb_backend, pdev);
memset(dev, 0, sizeof(*dev));
/* init transfer queues */
TAILQ_INIT(&dev->tr_head);
/* set context we belong to */
dev->ctx = ctx;
/* link together the two structures */
dev->os_priv = pdev;
pdev->privLuData = dev;
(*list)[i] = libusb_ref_device(dev);
i++;
}
(*list)[i] = NULL;
libusb20_be_free(usb_backend);
return (i);
}
void
libusb_free_device_list(libusb_device **list, int unref_devices)
{
int i;
if (list == NULL)
return; /* be NULL safe */
if (unref_devices) {
for (i = 0; list[i] != NULL; i++)
libusb_unref_device(list[i]);
}
free(list);
}
uint8_t
libusb_get_bus_number(libusb_device *dev)
{
if (dev == NULL)
return (0); /* should not happen */
return (libusb20_dev_get_bus_number(dev->os_priv));
}
uint8_t
libusb_get_device_address(libusb_device *dev)
{
if (dev == NULL)
return (0); /* should not happen */
return (libusb20_dev_get_address(dev->os_priv));
}
enum libusb_speed
libusb_get_device_speed(libusb_device *dev)
{
if (dev == NULL)
return (LIBUSB_SPEED_UNKNOWN); /* should not happen */
switch (libusb20_dev_get_speed(dev->os_priv)) {
case LIBUSB20_SPEED_LOW:
return (LIBUSB_SPEED_LOW);
case LIBUSB20_SPEED_FULL:
return (LIBUSB_SPEED_FULL);
case LIBUSB20_SPEED_HIGH:
return (LIBUSB_SPEED_HIGH);
case LIBUSB20_SPEED_SUPER:
return (LIBUSB_SPEED_SUPER);
default:
break;
}
return (LIBUSB_SPEED_UNKNOWN);
}
int
libusb_get_max_packet_size(libusb_device *dev, uint8_t endpoint)
{
struct libusb_config_descriptor *pdconf;
struct libusb_interface *pinf;
struct libusb_interface_descriptor *pdinf;
struct libusb_endpoint_descriptor *pdend;
int i;
int j;
int k;
int ret;
if (dev == NULL)
return (LIBUSB_ERROR_NO_DEVICE);
ret = libusb_get_active_config_descriptor(dev, &pdconf);
if (ret < 0)
return (ret);
ret = LIBUSB_ERROR_NOT_FOUND;
for (i = 0; i < pdconf->bNumInterfaces; i++) {
pinf = &pdconf->interface[i];
for (j = 0; j < pinf->num_altsetting; j++) {
pdinf = &pinf->altsetting[j];
for (k = 0; k < pdinf->bNumEndpoints; k++) {
pdend = &pdinf->endpoint[k];
if (pdend->bEndpointAddress == endpoint) {
ret = pdend->wMaxPacketSize;
goto out;
}
}
}
}
out:
libusb_free_config_descriptor(pdconf);
return (ret);
}
int
libusb_get_max_iso_packet_size(libusb_device *dev, uint8_t endpoint)
{
int multiplier;
int ret;
ret = libusb_get_max_packet_size(dev, endpoint);
switch (libusb20_dev_get_speed(dev->os_priv)) {
case LIBUSB20_SPEED_LOW:
case LIBUSB20_SPEED_FULL:
break;
default:
if (ret > -1) {
multiplier = (1 + ((ret >> 11) & 3));
if (multiplier > 3)
multiplier = 3;
ret = (ret & 0x7FF) * multiplier;
}
break;
}
return (ret);
}
libusb_device *
libusb_ref_device(libusb_device *dev)
{
if (dev == NULL)
return (NULL); /* be NULL safe */
CTX_LOCK(dev->ctx);
dev->refcnt++;
CTX_UNLOCK(dev->ctx);
return (dev);
}
void
libusb_unref_device(libusb_device *dev)
{
if (dev == NULL)
return; /* be NULL safe */
CTX_LOCK(dev->ctx);
dev->refcnt--;
CTX_UNLOCK(dev->ctx);
if (dev->refcnt == 0) {
libusb20_dev_free(dev->os_priv);
free(dev);
}
}
int
libusb_open(libusb_device *dev, libusb_device_handle **devh)
{
libusb_context *ctx = dev->ctx;
struct libusb20_device *pdev = dev->os_priv;
uint8_t dummy;
int err;
if (devh == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
/* set default device handle value */
*devh = NULL;
dev = libusb_ref_device(dev);
if (dev == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
err = libusb20_dev_open(pdev, 16 * 4 /* number of endpoints */ );
if (err) {
libusb_unref_device(dev);
return (LIBUSB_ERROR_NO_MEM);
}
libusb10_add_pollfd(ctx, &dev->dev_poll, pdev, libusb20_dev_get_fd(pdev), POLLIN |
POLLOUT | POLLRDNORM | POLLWRNORM);
/* make sure our event loop detects the new device */
dummy = 0;
err = write(ctx->ctrl_pipe[1], &dummy, sizeof(dummy));
if (err < (int)sizeof(dummy)) {
/* ignore error, if any */
DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_open write failed!");
}
*devh = pdev;
return (0);
}
libusb_device_handle *
libusb_open_device_with_vid_pid(libusb_context *ctx, uint16_t vendor_id,
uint16_t product_id)
{
struct libusb_device **devs;
struct libusb20_device *pdev;
struct LIBUSB20_DEVICE_DESC_DECODED *pdesc;
int i;
int j;
ctx = GET_CONTEXT(ctx);
if (ctx == NULL)
return (NULL); /* be NULL safe */
DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_open_device_width_vid_pid enter");
if ((i = libusb_get_device_list(ctx, &devs)) < 0)
return (NULL);
pdev = NULL;
for (j = 0; j < i; j++) {
struct libusb20_device *tdev;
tdev = devs[j]->os_priv;
pdesc = libusb20_dev_get_device_desc(tdev);
/*
* NOTE: The USB library will automatically swap the
* fields in the device descriptor to be of host
* endian type!
*/
if (pdesc->idVendor == vendor_id &&
pdesc->idProduct == product_id) {
libusb_open(devs[j], &pdev);
break;
}
}
libusb_free_device_list(devs, 1);
DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_open_device_width_vid_pid leave");
return (pdev);
}
void
libusb_close(struct libusb20_device *pdev)
{
libusb_context *ctx;
struct libusb_device *dev;
uint8_t dummy;
int err;
if (pdev == NULL)
return; /* be NULL safe */
dev = libusb_get_device(pdev);
ctx = dev->ctx;
libusb10_remove_pollfd(ctx, &dev->dev_poll);
libusb20_dev_close(pdev);
/* unref will free the "pdev" when the refcount reaches zero */
libusb_unref_device(dev);
/* make sure our event loop detects the closed device */
dummy = 0;
err = write(ctx->ctrl_pipe[1], &dummy, sizeof(dummy));
if (err < (int)sizeof(dummy)) {
/* ignore error, if any */
DPRINTF(ctx, LIBUSB_DEBUG_FUNCTION, "libusb_close write failed!");
}
}
libusb_device *
libusb_get_device(struct libusb20_device *pdev)
{
if (pdev == NULL)
return (NULL);
return ((libusb_device *)pdev->privLuData);
}
int
libusb_get_configuration(struct libusb20_device *pdev, int *config)
{
struct libusb20_config *pconf;
if (pdev == NULL || config == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
pconf = libusb20_dev_alloc_config(pdev, libusb20_dev_get_config_index(pdev));
if (pconf == NULL)
return (LIBUSB_ERROR_NO_MEM);
*config = pconf->desc.bConfigurationValue;
free(pconf);
return (0);
}
int
libusb_set_configuration(struct libusb20_device *pdev, int configuration)
{
struct libusb20_config *pconf;
struct libusb_device *dev;
int err;
uint8_t i;
dev = libusb_get_device(pdev);
if (dev == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
if (configuration < 1) {
/* unconfigure */
i = 255;
} else {
for (i = 0; i != 255; i++) {
uint8_t found;
pconf = libusb20_dev_alloc_config(pdev, i);
if (pconf == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
found = (pconf->desc.bConfigurationValue
== configuration);
free(pconf);
if (found)
goto set_config;
}
return (LIBUSB_ERROR_INVALID_PARAM);
}
set_config:
libusb10_cancel_all_transfer(dev);
libusb10_remove_pollfd(dev->ctx, &dev->dev_poll);
err = libusb20_dev_set_config_index(pdev, i);
libusb10_add_pollfd(dev->ctx, &dev->dev_poll, pdev, libusb20_dev_get_fd(pdev), POLLIN |
POLLOUT | POLLRDNORM | POLLWRNORM);
return (err ? LIBUSB_ERROR_INVALID_PARAM : 0);
}
int
libusb_claim_interface(struct libusb20_device *pdev, int interface_number)
{
libusb_device *dev;
int err = 0;
dev = libusb_get_device(pdev);
if (dev == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
if (interface_number < 0 || interface_number > 31)
return (LIBUSB_ERROR_INVALID_PARAM);
CTX_LOCK(dev->ctx);
if (dev->claimed_interfaces & (1 << interface_number))
err = LIBUSB_ERROR_BUSY;
if (!err)
dev->claimed_interfaces |= (1 << interface_number);
CTX_UNLOCK(dev->ctx);
return (err);
}
int
libusb_release_interface(struct libusb20_device *pdev, int interface_number)
{
libusb_device *dev;
int err = 0;
dev = libusb_get_device(pdev);
if (dev == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
if (interface_number < 0 || interface_number > 31)
return (LIBUSB_ERROR_INVALID_PARAM);
CTX_LOCK(dev->ctx);
if (!(dev->claimed_interfaces & (1 << interface_number)))
err = LIBUSB_ERROR_NOT_FOUND;
if (!err)
dev->claimed_interfaces &= ~(1 << interface_number);
CTX_UNLOCK(dev->ctx);
return (err);
}
int
libusb_set_interface_alt_setting(struct libusb20_device *pdev,
int interface_number, int alternate_setting)
{
libusb_device *dev;
int err = 0;
dev = libusb_get_device(pdev);
if (dev == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
if (interface_number < 0 || interface_number > 31)
return (LIBUSB_ERROR_INVALID_PARAM);
CTX_LOCK(dev->ctx);
if (!(dev->claimed_interfaces & (1 << interface_number)))
err = LIBUSB_ERROR_NOT_FOUND;
CTX_UNLOCK(dev->ctx);
if (err)
return (err);
libusb10_cancel_all_transfer(dev);
libusb10_remove_pollfd(dev->ctx, &dev->dev_poll);
err = libusb20_dev_set_alt_index(pdev,
interface_number, alternate_setting);
libusb10_add_pollfd(dev->ctx, &dev->dev_poll,
pdev, libusb20_dev_get_fd(pdev),
POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM);
return (err ? LIBUSB_ERROR_OTHER : 0);
}
static struct libusb20_transfer *
libusb10_get_transfer(struct libusb20_device *pdev,
uint8_t endpoint, uint8_t xfer_index)
{
xfer_index &= 1; /* double buffering */
xfer_index |= (endpoint & LIBUSB20_ENDPOINT_ADDRESS_MASK) * 4;
if (endpoint & LIBUSB20_ENDPOINT_DIR_MASK) {
/* this is an IN endpoint */
xfer_index |= 2;
}
return (libusb20_tr_get_pointer(pdev, xfer_index));
}
int
libusb_clear_halt(struct libusb20_device *pdev, uint8_t endpoint)
{
struct libusb20_transfer *xfer;
struct libusb_device *dev;
int err;
xfer = libusb10_get_transfer(pdev, endpoint, 0);
if (xfer == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
dev = libusb_get_device(pdev);
if (dev == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
CTX_LOCK(dev->ctx);
err = libusb20_tr_open(xfer, 0, 1, endpoint);
CTX_UNLOCK(dev->ctx);
if (err != 0 && err != LIBUSB20_ERROR_BUSY)
return (LIBUSB_ERROR_OTHER);
libusb20_tr_clear_stall_sync(xfer);
/* check if we opened the transfer */
if (err == 0) {
CTX_LOCK(dev->ctx);
libusb20_tr_close(xfer);
CTX_UNLOCK(dev->ctx);
}
return (0); /* success */
}
int
libusb_reset_device(struct libusb20_device *pdev)
{
libusb_device *dev;
int err;
dev = libusb_get_device(pdev);
if (dev == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
libusb10_cancel_all_transfer(dev);
libusb10_remove_pollfd(dev->ctx, &dev->dev_poll);
err = libusb20_dev_reset(pdev);
libusb10_add_pollfd(dev->ctx, &dev->dev_poll,
pdev, libusb20_dev_get_fd(pdev),
POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM);
return (err ? LIBUSB_ERROR_OTHER : 0);
}
int
libusb_check_connected(struct libusb20_device *pdev)
{
libusb_device *dev;
int err;
dev = libusb_get_device(pdev);
if (dev == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
err = libusb20_dev_check_connected(pdev);
return (err ? LIBUSB_ERROR_NO_DEVICE : 0);
}
int
libusb_kernel_driver_active(struct libusb20_device *pdev, int interface)
{
if (pdev == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
if (libusb20_dev_kernel_driver_active(pdev, interface))
return (0); /* no kernel driver is active */
else
return (1); /* kernel driver is active */
}
int
libusb_get_driver_np(struct libusb20_device *pdev, int interface,
char *name, int namelen)
{
return (libusb_get_driver(pdev, interface, name, namelen));
}
int
libusb_get_driver(struct libusb20_device *pdev, int interface,
char *name, int namelen)
{
char *ptr;
int err;
if (pdev == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
if (namelen < 1)
return (LIBUSB_ERROR_INVALID_PARAM);
if (namelen > 255)
namelen = 255;
err = libusb20_dev_get_iface_desc(
pdev, interface, name, namelen);
if (err != 0)
return (LIBUSB_ERROR_OTHER);
/* we only want the driver name */
ptr = strstr(name, ":");
if (ptr != NULL)
*ptr = 0;
return (0);
}
int
libusb_detach_kernel_driver_np(struct libusb20_device *pdev, int interface)
{
return (libusb_detach_kernel_driver(pdev, interface));
}
int
libusb_detach_kernel_driver(struct libusb20_device *pdev, int interface)
{
int err;
if (pdev == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
err = libusb20_dev_detach_kernel_driver(
pdev, interface);
return (err ? LIBUSB_ERROR_OTHER : 0);
}
int
libusb_attach_kernel_driver(struct libusb20_device *pdev, int interface)
{
if (pdev == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
/* stub - currently not supported by libusb20 */
return (0);
}
/* Asynchronous device I/O */
struct libusb_transfer *
libusb_alloc_transfer(int iso_packets)
{
struct libusb_transfer *uxfer;
struct libusb_super_transfer *sxfer;
int len;
len = sizeof(struct libusb_transfer) +
sizeof(struct libusb_super_transfer) +
(iso_packets * sizeof(libusb_iso_packet_descriptor));
sxfer = malloc(len);
if (sxfer == NULL)
return (NULL);
memset(sxfer, 0, len);
uxfer = (struct libusb_transfer *)(
((uint8_t *)sxfer) + sizeof(*sxfer));
/* set default value */
uxfer->num_iso_packets = iso_packets;
return (uxfer);
}
void
libusb_free_transfer(struct libusb_transfer *uxfer)
{
struct libusb_super_transfer *sxfer;
if (uxfer == NULL)
return; /* be NULL safe */
/* check if we should free the transfer buffer */
if (uxfer->flags & LIBUSB_TRANSFER_FREE_BUFFER)
free(uxfer->buffer);
sxfer = (struct libusb_super_transfer *)(
(uint8_t *)uxfer - sizeof(*sxfer));
free(sxfer);
}
static uint32_t
libusb10_get_maxframe(struct libusb20_device *pdev, libusb_transfer *xfer)
{
uint32_t ret;
switch (xfer->type) {
case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS:
ret = 60 | LIBUSB20_MAX_FRAME_PRE_SCALE; /* 60ms */
break;
case LIBUSB_TRANSFER_TYPE_CONTROL:
ret = 2;
break;
default:
ret = 1;
break;
}
return (ret);
}
static int
libusb10_get_buffsize(struct libusb20_device *pdev, libusb_transfer *xfer)
{
int ret;
int usb_speed;
usb_speed = libusb20_dev_get_speed(pdev);
switch (xfer->type) {
case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS:
ret = 0; /* kernel will auto-select */
break;
case LIBUSB_TRANSFER_TYPE_CONTROL:
ret = 1024;
break;
default:
switch (usb_speed) {
case LIBUSB20_SPEED_LOW:
ret = 256;
break;
case LIBUSB20_SPEED_FULL:
ret = 4096;
break;
default:
ret = 16384;
break;
}
break;
}
return (ret);
}
static int
libusb10_convert_error(uint8_t status)
{
; /* indent fix */
switch (status) {
case LIBUSB20_TRANSFER_START:
case LIBUSB20_TRANSFER_COMPLETED:
return (LIBUSB_TRANSFER_COMPLETED);
case LIBUSB20_TRANSFER_OVERFLOW:
return (LIBUSB_TRANSFER_OVERFLOW);
case LIBUSB20_TRANSFER_NO_DEVICE:
return (LIBUSB_TRANSFER_NO_DEVICE);
case LIBUSB20_TRANSFER_STALL:
return (LIBUSB_TRANSFER_STALL);
case LIBUSB20_TRANSFER_CANCELLED:
return (LIBUSB_TRANSFER_CANCELLED);
case LIBUSB20_TRANSFER_TIMED_OUT:
return (LIBUSB_TRANSFER_TIMED_OUT);
default:
return (LIBUSB_TRANSFER_ERROR);
}
}
/* This function must be called locked */
static void
libusb10_complete_transfer(struct libusb20_transfer *pxfer,
struct libusb_super_transfer *sxfer, int status)
{
struct libusb_transfer *uxfer;
struct libusb_device *dev;
uxfer = (struct libusb_transfer *)(
((uint8_t *)sxfer) + sizeof(*sxfer));
if (pxfer != NULL)
libusb20_tr_set_priv_sc1(pxfer, NULL);
/* set transfer status */
uxfer->status = status;
/* update super transfer state */
sxfer->state = LIBUSB_SUPER_XFER_ST_NONE;
dev = libusb_get_device(uxfer->dev_handle);
TAILQ_INSERT_TAIL(&dev->ctx->tr_done, sxfer, entry);
}
/* This function must be called locked */
static void
libusb10_isoc_proxy(struct libusb20_transfer *pxfer)
{
struct libusb_super_transfer *sxfer;
struct libusb_transfer *uxfer;
uint32_t actlen;
uint16_t iso_packets;
uint16_t i;
uint8_t status;
uint8_t flags;
status = libusb20_tr_get_status(pxfer);
sxfer = libusb20_tr_get_priv_sc1(pxfer);
actlen = libusb20_tr_get_actual_length(pxfer);
iso_packets = libusb20_tr_get_max_frames(pxfer);
if (sxfer == NULL)
return; /* cancelled - nothing to do */
uxfer = (struct libusb_transfer *)(
((uint8_t *)sxfer) + sizeof(*sxfer));
if (iso_packets > uxfer->num_iso_packets)
iso_packets = uxfer->num_iso_packets;
if (iso_packets == 0)
return; /* nothing to do */
/* make sure that the number of ISOCHRONOUS packets is valid */
uxfer->num_iso_packets = iso_packets;
flags = uxfer->flags;
switch (status) {
case LIBUSB20_TRANSFER_COMPLETED:
/* update actual length */
uxfer->actual_length = actlen;
for (i = 0; i != iso_packets; i++) {
uxfer->iso_packet_desc[i].actual_length =
libusb20_tr_get_length(pxfer, i);
}
libusb10_complete_transfer(pxfer, sxfer, LIBUSB_TRANSFER_COMPLETED);
break;
case LIBUSB20_TRANSFER_START:
/* setup length(s) */
actlen = 0;
for (i = 0; i != iso_packets; i++) {
libusb20_tr_setup_isoc(pxfer,
&uxfer->buffer[actlen],
uxfer->iso_packet_desc[i].length, i);
actlen += uxfer->iso_packet_desc[i].length;
}
/* no remainder */
sxfer->rem_len = 0;
libusb20_tr_set_total_frames(pxfer, iso_packets);
libusb20_tr_submit(pxfer);
/* fork another USB transfer, if any */
libusb10_submit_transfer_sub(libusb20_tr_get_priv_sc0(pxfer), uxfer->endpoint);
break;
default:
libusb10_complete_transfer(pxfer, sxfer, libusb10_convert_error(status));
break;
}
}
/* This function must be called locked */
static void
libusb10_bulk_intr_proxy(struct libusb20_transfer *pxfer)
{
struct libusb_super_transfer *sxfer;
struct libusb_transfer *uxfer;
uint32_t max_bulk;
uint32_t actlen;
uint8_t status;
uint8_t flags;
status = libusb20_tr_get_status(pxfer);
sxfer = libusb20_tr_get_priv_sc1(pxfer);
max_bulk = libusb20_tr_get_max_total_length(pxfer);
actlen = libusb20_tr_get_actual_length(pxfer);
if (sxfer == NULL)
return; /* cancelled - nothing to do */
uxfer = (struct libusb_transfer *)(
((uint8_t *)sxfer) + sizeof(*sxfer));
flags = uxfer->flags;
switch (status) {
case LIBUSB20_TRANSFER_COMPLETED:
uxfer->actual_length += actlen;
/* check for short packet */
if (sxfer->last_len != actlen) {
if (flags & LIBUSB_TRANSFER_SHORT_NOT_OK) {
libusb10_complete_transfer(pxfer, sxfer, LIBUSB_TRANSFER_ERROR);
} else {
libusb10_complete_transfer(pxfer, sxfer, LIBUSB_TRANSFER_COMPLETED);
}
break;
}
/* check for end of data */
if (sxfer->rem_len == 0) {
libusb10_complete_transfer(pxfer, sxfer, LIBUSB_TRANSFER_COMPLETED);
break;
}
/* FALLTHROUGH */
case LIBUSB20_TRANSFER_START:
if (max_bulk > sxfer->rem_len) {
max_bulk = sxfer->rem_len;
}
/* setup new BULK or INTERRUPT transaction */
libusb20_tr_setup_bulk(pxfer,
sxfer->curr_data, max_bulk, uxfer->timeout);
/* update counters */
sxfer->last_len = max_bulk;
sxfer->curr_data += max_bulk;
sxfer->rem_len -= max_bulk;
libusb20_tr_submit(pxfer);
/* check if we can fork another USB transfer */
if (sxfer->rem_len == 0)
libusb10_submit_transfer_sub(libusb20_tr_get_priv_sc0(pxfer), uxfer->endpoint);
break;
default:
libusb10_complete_transfer(pxfer, sxfer, libusb10_convert_error(status));
break;
}
}
/* This function must be called locked */
static void
libusb10_ctrl_proxy(struct libusb20_transfer *pxfer)
{
struct libusb_super_transfer *sxfer;
struct libusb_transfer *uxfer;
uint32_t max_bulk;
uint32_t actlen;
uint8_t status;
uint8_t flags;
status = libusb20_tr_get_status(pxfer);
sxfer = libusb20_tr_get_priv_sc1(pxfer);
max_bulk = libusb20_tr_get_max_total_length(pxfer);
actlen = libusb20_tr_get_actual_length(pxfer);
if (sxfer == NULL)
return; /* cancelled - nothing to do */
uxfer = (struct libusb_transfer *)(
((uint8_t *)sxfer) + sizeof(*sxfer));
flags = uxfer->flags;
switch (status) {
case LIBUSB20_TRANSFER_COMPLETED:
uxfer->actual_length += actlen;
/* subtract length of SETUP packet, if any */
actlen -= libusb20_tr_get_length(pxfer, 0);
/* check for short packet */
if (sxfer->last_len != actlen) {
if (flags & LIBUSB_TRANSFER_SHORT_NOT_OK) {
libusb10_complete_transfer(pxfer, sxfer, LIBUSB_TRANSFER_ERROR);
} else {
libusb10_complete_transfer(pxfer, sxfer, LIBUSB_TRANSFER_COMPLETED);
}
break;
}
/* check for end of data */
if (sxfer->rem_len == 0) {
libusb10_complete_transfer(pxfer, sxfer, LIBUSB_TRANSFER_COMPLETED);
break;
}
/* FALLTHROUGH */
case LIBUSB20_TRANSFER_START:
if (max_bulk > sxfer->rem_len) {
max_bulk = sxfer->rem_len;
}
/* setup new CONTROL transaction */
if (status == LIBUSB20_TRANSFER_COMPLETED) {
/* next fragment - don't send SETUP packet */
libusb20_tr_set_length(pxfer, 0, 0);
} else {
/* first fragment - send SETUP packet */
libusb20_tr_set_length(pxfer, 8, 0);
libusb20_tr_set_buffer(pxfer, uxfer->buffer, 0);
}
if (max_bulk != 0) {
libusb20_tr_set_length(pxfer, max_bulk, 1);
libusb20_tr_set_buffer(pxfer, sxfer->curr_data, 1);
libusb20_tr_set_total_frames(pxfer, 2);
} else {
libusb20_tr_set_total_frames(pxfer, 1);
}
/* update counters */
sxfer->last_len = max_bulk;
sxfer->curr_data += max_bulk;
sxfer->rem_len -= max_bulk;
libusb20_tr_submit(pxfer);
/* check if we can fork another USB transfer */
if (sxfer->rem_len == 0)
libusb10_submit_transfer_sub(libusb20_tr_get_priv_sc0(pxfer), uxfer->endpoint);
break;
default:
libusb10_complete_transfer(pxfer, sxfer, libusb10_convert_error(status));
break;
}
}
/* The following function must be called locked */
static void
libusb10_submit_transfer_sub(struct libusb20_device *pdev, uint8_t endpoint)
{
struct libusb20_transfer *pxfer0;
struct libusb20_transfer *pxfer1;
struct libusb_super_transfer *sxfer;
struct libusb_transfer *uxfer;
struct libusb_device *dev;
int err;
int buffsize;
int maxframe;
int temp;
uint8_t dummy;
dev = libusb_get_device(pdev);
pxfer0 = libusb10_get_transfer(pdev, endpoint, 0);
pxfer1 = libusb10_get_transfer(pdev, endpoint, 1);
if (pxfer0 == NULL || pxfer1 == NULL)
return; /* shouldn't happen */
temp = 0;
if (libusb20_tr_pending(pxfer0))
temp |= 1;
if (libusb20_tr_pending(pxfer1))
temp |= 2;
switch (temp) {
case 3:
/* wait till one of the transfers complete */
return;
case 2:
sxfer = libusb20_tr_get_priv_sc1(pxfer1);
if (sxfer == NULL)
return; /* cancelling */
if (sxfer->rem_len)
return; /* cannot queue another one */
/* swap transfers */
pxfer1 = pxfer0;
break;
case 1:
sxfer = libusb20_tr_get_priv_sc1(pxfer0);
if (sxfer == NULL)
return; /* cancelling */
if (sxfer->rem_len)
return; /* cannot queue another one */
/* swap transfers */
pxfer0 = pxfer1;
break;
default:
break;
}
/* find next transfer on same endpoint */
TAILQ_FOREACH(sxfer, &dev->tr_head, entry) {
uxfer = (struct libusb_transfer *)(
((uint8_t *)sxfer) + sizeof(*sxfer));
if (uxfer->endpoint == endpoint) {
TAILQ_REMOVE(&dev->tr_head, sxfer, entry);
sxfer->entry.tqe_prev = NULL;
goto found;
}
}
return; /* success */
found:
libusb20_tr_set_priv_sc0(pxfer0, pdev);
libusb20_tr_set_priv_sc1(pxfer0, sxfer);
/* reset super transfer state */
sxfer->rem_len = uxfer->length;
sxfer->curr_data = uxfer->buffer;
uxfer->actual_length = 0;
switch (uxfer->type) {
case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS:
libusb20_tr_set_callback(pxfer0, libusb10_isoc_proxy);
break;
case LIBUSB_TRANSFER_TYPE_BULK:
case LIBUSB_TRANSFER_TYPE_INTERRUPT:
libusb20_tr_set_callback(pxfer0, libusb10_bulk_intr_proxy);
break;
case LIBUSB_TRANSFER_TYPE_CONTROL:
libusb20_tr_set_callback(pxfer0, libusb10_ctrl_proxy);
if (sxfer->rem_len < 8)
goto failure;
/* remove SETUP packet from data */
sxfer->rem_len -= 8;
sxfer->curr_data += 8;
break;
default:
goto failure;
}
buffsize = libusb10_get_buffsize(pdev, uxfer);
maxframe = libusb10_get_maxframe(pdev, uxfer);
/* make sure the transfer is opened */
err = libusb20_tr_open(pxfer0, buffsize, maxframe, endpoint);
if (err && (err != LIBUSB20_ERROR_BUSY)) {
goto failure;
}
libusb20_tr_start(pxfer0);
return;
failure:
libusb10_complete_transfer(pxfer0, sxfer, LIBUSB_TRANSFER_ERROR);
/* make sure our event loop spins the done handler */
dummy = 0;
write(dev->ctx->ctrl_pipe[1], &dummy, sizeof(dummy));
}
/* The following function must be called unlocked */
int
libusb_submit_transfer(struct libusb_transfer *uxfer)
{
struct libusb20_transfer *pxfer0;
struct libusb20_transfer *pxfer1;
struct libusb_super_transfer *sxfer;
struct libusb_device *dev;
uint8_t endpoint;
int err;
if (uxfer == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
if (uxfer->dev_handle == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
endpoint = uxfer->endpoint;
dev = libusb_get_device(uxfer->dev_handle);
DPRINTF(dev->ctx, LIBUSB_DEBUG_FUNCTION, "libusb_submit_transfer enter");
sxfer = (struct libusb_super_transfer *)(
(uint8_t *)uxfer - sizeof(*sxfer));
CTX_LOCK(dev->ctx);
pxfer0 = libusb10_get_transfer(uxfer->dev_handle, endpoint, 0);
pxfer1 = libusb10_get_transfer(uxfer->dev_handle, endpoint, 1);
if (pxfer0 == NULL || pxfer1 == NULL) {
err = LIBUSB_ERROR_OTHER;
} else if ((sxfer->entry.tqe_prev != NULL) ||
(libusb20_tr_get_priv_sc1(pxfer0) == sxfer) ||
(libusb20_tr_get_priv_sc1(pxfer1) == sxfer)) {
err = LIBUSB_ERROR_BUSY;
} else {
/* set pending state */
sxfer->state = LIBUSB_SUPER_XFER_ST_PEND;
/* insert transfer into transfer head list */
TAILQ_INSERT_TAIL(&dev->tr_head, sxfer, entry);
/* start work transfers */
libusb10_submit_transfer_sub(
uxfer->dev_handle, endpoint);
err = 0; /* success */
}
CTX_UNLOCK(dev->ctx);
DPRINTF(dev->ctx, LIBUSB_DEBUG_FUNCTION, "libusb_submit_transfer leave %d", err);
return (err);
}
/* Asynchronous transfer cancel */
int
libusb_cancel_transfer(struct libusb_transfer *uxfer)
{
struct libusb20_transfer *pxfer0;
struct libusb20_transfer *pxfer1;
struct libusb_super_transfer *sxfer;
struct libusb_device *dev;
uint8_t endpoint;
int retval;
if (uxfer == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
/* check if not initialised */
if (uxfer->dev_handle == NULL)
return (LIBUSB_ERROR_NOT_FOUND);
endpoint = uxfer->endpoint;
dev = libusb_get_device(uxfer->dev_handle);
DPRINTF(dev->ctx, LIBUSB_DEBUG_FUNCTION, "libusb_cancel_transfer enter");
sxfer = (struct libusb_super_transfer *)(
(uint8_t *)uxfer - sizeof(*sxfer));
retval = 0;
CTX_LOCK(dev->ctx);
pxfer0 = libusb10_get_transfer(uxfer->dev_handle, endpoint, 0);
pxfer1 = libusb10_get_transfer(uxfer->dev_handle, endpoint, 1);
if (sxfer->state != LIBUSB_SUPER_XFER_ST_PEND) {
/* only update the transfer status */
uxfer->status = LIBUSB_TRANSFER_CANCELLED;
retval = LIBUSB_ERROR_NOT_FOUND;
} else if (sxfer->entry.tqe_prev != NULL) {
/* we are lucky - transfer is on a queue */
TAILQ_REMOVE(&dev->tr_head, sxfer, entry);
sxfer->entry.tqe_prev = NULL;
libusb10_complete_transfer(NULL,
sxfer, LIBUSB_TRANSFER_CANCELLED);
} else if (pxfer0 == NULL || pxfer1 == NULL) {
/* not started */
retval = LIBUSB_ERROR_NOT_FOUND;
} else if (libusb20_tr_get_priv_sc1(pxfer0) == sxfer) {
libusb10_complete_transfer(pxfer0,
sxfer, LIBUSB_TRANSFER_CANCELLED);
libusb20_tr_stop(pxfer0);
/* make sure the queue doesn't stall */
libusb10_submit_transfer_sub(
uxfer->dev_handle, endpoint);
} else if (libusb20_tr_get_priv_sc1(pxfer1) == sxfer) {
libusb10_complete_transfer(pxfer1,
sxfer, LIBUSB_TRANSFER_CANCELLED);
libusb20_tr_stop(pxfer1);
/* make sure the queue doesn't stall */
libusb10_submit_transfer_sub(
uxfer->dev_handle, endpoint);
} else {
/* not started */
retval = LIBUSB_ERROR_NOT_FOUND;
}
CTX_UNLOCK(dev->ctx);
DPRINTF(dev->ctx, LIBUSB_DEBUG_FUNCTION, "libusb_cancel_transfer leave");
return (retval);
}
UNEXPORTED void
libusb10_cancel_all_transfer(libusb_device *dev)
{
/* TODO */
}
uint16_t
libusb_cpu_to_le16(uint16_t x)
{
return (htole16(x));
}
uint16_t
libusb_le16_to_cpu(uint16_t x)
{
return (le16toh(x));
}
const char *
libusb_strerror(int code)
{
switch (code) {
case LIBUSB_SUCCESS:
return ("Success");
case LIBUSB_ERROR_IO:
return ("I/O error");
case LIBUSB_ERROR_INVALID_PARAM:
return ("Invalid parameter");
case LIBUSB_ERROR_ACCESS:
return ("Permissions error");
case LIBUSB_ERROR_NO_DEVICE:
return ("No device");
case LIBUSB_ERROR_NOT_FOUND:
return ("Not found");
case LIBUSB_ERROR_BUSY:
return ("Device busy");
case LIBUSB_ERROR_TIMEOUT:
return ("Timeout");
case LIBUSB_ERROR_OVERFLOW:
return ("Overflow");
case LIBUSB_ERROR_PIPE:
return ("Pipe error");
case LIBUSB_ERROR_INTERRUPTED:
return ("Interrupted");
case LIBUSB_ERROR_NO_MEM:
return ("Out of memory");
case LIBUSB_ERROR_NOT_SUPPORTED:
return ("Not supported");
case LIBUSB_ERROR_OTHER:
return ("Other error");
default:
return ("Unknown error");
}
}
const char *
libusb_error_name(int code)
{
switch (code) {
case LIBUSB_SUCCESS:
return ("LIBUSB_SUCCESS");
case LIBUSB_ERROR_IO:
return ("LIBUSB_ERROR_IO");
case LIBUSB_ERROR_INVALID_PARAM:
return ("LIBUSB_ERROR_INVALID_PARAM");
case LIBUSB_ERROR_ACCESS:
return ("LIBUSB_ERROR_ACCESS");
case LIBUSB_ERROR_NO_DEVICE:
return ("LIBUSB_ERROR_NO_DEVICE");
case LIBUSB_ERROR_NOT_FOUND:
return ("LIBUSB_ERROR_NOT_FOUND");
case LIBUSB_ERROR_BUSY:
return ("LIBUSB_ERROR_BUSY");
case LIBUSB_ERROR_TIMEOUT:
return ("LIBUSB_ERROR_TIMEOUT");
case LIBUSB_ERROR_OVERFLOW:
return ("LIBUSB_ERROR_OVERFLOW");
case LIBUSB_ERROR_PIPE:
return ("LIBUSB_ERROR_PIPE");
case LIBUSB_ERROR_INTERRUPTED:
return ("LIBUSB_ERROR_INTERRUPTED");
case LIBUSB_ERROR_NO_MEM:
return ("LIBUSB_ERROR_NO_MEM");
case LIBUSB_ERROR_NOT_SUPPORTED:
return ("LIBUSB_ERROR_NOT_SUPPORTED");
case LIBUSB_ERROR_OTHER:
return ("LIBUSB_ERROR_OTHER");
default:
return ("LIBUSB_ERROR_UNKNOWN");
}
}
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