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io/util/usb: Add interrupt_transfer function

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set_configuration was moved after the kernel_driver_active
check otherwise lxio device will fail to set config.
This commit is contained in:
Cube 2022-06-21 14:00:23 -07:00 committed by voidderef
parent d129b53561
commit 8968725a4b
2 changed files with 56 additions and 14 deletions
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53
src/main/io/util/usb.c
View File

@ -99,20 +99,6 @@ void *io_usb_open(uint16_t vid, uint16_t pid, uint16_t config, uint16_t iface)
return NULL;
}
ret = libusb_set_configuration(dev, config);
if (ret != LIBUSB_SUCCESS) {
libusb_close(dev);
libusb_exit(ctx);
log_error(
"(%04X:%04X) Setting configuration failed",
vid,
pid,
libusb_error_name(ret));
return NULL;
}
/* check if the device is attached to the kernel, detach it first then */
if (libusb_kernel_driver_active(dev, iface) == 1) {
ret = libusb_detach_kernel_driver(dev, iface);
@ -130,6 +116,20 @@ void *io_usb_open(uint16_t vid, uint16_t pid, uint16_t config, uint16_t iface)
}
}
ret = libusb_set_configuration(dev, config);
if (ret != LIBUSB_SUCCESS) {
libusb_close(dev);
libusb_exit(ctx);
log_error(
"(%04X:%04X) Setting configuration failed",
vid,
pid,
libusb_error_name(ret));
return NULL;
}
ret = libusb_claim_interface(dev, iface);
if (ret != LIBUSB_SUCCESS) {
@ -181,6 +181,31 @@ int32_t io_usb_control_transfer(
return ret;
}
int32_t io_usb_interrupt_transfer(
void *handle,
int ep,
uint8_t *data,
uint16_t len,
uint32_t timeout)
{
struct usb_io_ctx *dev = (struct usb_io_ctx *) handle;
int32_t ret, transferred;
ret =
libusb_interrupt_transfer(
dev->dev, ep, data, len, &transferred, timeout);
if (transferred != len) {
log_error(
"Interrupt transfer, addr %02x, handle %p failed: %s",
handle,
ep,
libusb_error_name(ret));
}
return transferred;
}
void io_usb_close(void *handle)
{
struct usb_io_ctx *dev = (struct usb_io_ctx *) handle;

17
src/main/io/util/usb_.h
View File

@ -42,6 +42,23 @@ int32_t io_usb_control_transfer(
uint16_t len,
uint32_t timeout);
/**
* Execute an interrupt transfer request.
*
* @param handle Handle of an opened usb device
* @param ep Endpoint address to communicate with.
* @param data Pointer to an allocated buffer (depending on the vendor
* specific request type, this can be a read or write buffer)
* @param len Length of the data to write/read
* @param timeout Timeout for the operation in ms
* @return Number of bytes read/written or -1 on error
*/
int32_t io_usb_interrupt_transfer(
void *handle,
int ep,
uint8_t *data,
uint16_t len,
uint32_t timeout);
/**
* Close a opened usb device
*