111 lines
3 KiB
C
Executable file
111 lines
3 KiB
C
Executable file
/*
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* URB formatting related implementation
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*/
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#include <minix/sysutil.h> /* panic */
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#include <minix/usb.h> /* struct usb_ctrlrequest */
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#include <string.h> /* memset */
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#include <assert.h>
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#include "common.h"
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#include "urb_helper.h"
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/*---------------------------*
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* defined functions *
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*---------------------------*/
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/*===========================================================================*
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* init_urb *
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*===========================================================================*/
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void
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init_urb(struct ddekit_usb_urb * urb, struct ddekit_usb_dev * dev,
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ddekit_int32_t urb_type, ddekit_int32_t urb_endpoint,
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ddekit_int32_t urb_direction)
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{
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MASS_DEBUG_DUMP;
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/* Sanity checks */
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assert(NULL != urb);
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assert(NULL != dev);
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assert((DDEKIT_USB_TRANSFER_BLK == urb_type) ||
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(DDEKIT_USB_TRANSFER_CTL == urb_type) ||
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(DDEKIT_USB_TRANSFER_INT == urb_type) ||
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(DDEKIT_USB_TRANSFER_ISO == urb_type));
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assert(urb_endpoint < 16);
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assert((DDEKIT_USB_IN == urb_direction) ||
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(DDEKIT_USB_OUT == urb_direction));
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/* Clear block first */
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memset(urb, 0, sizeof(*urb));
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/* Set supplied values */
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urb->dev = dev;
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urb->type = urb_type;
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urb->endpoint = urb_endpoint;
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urb->direction = urb_direction;
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}
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/*===========================================================================*
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* attach_urb_data *
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*===========================================================================*/
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void
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attach_urb_data(struct ddekit_usb_urb * urb, int buf_type,
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void * buf, ddekit_uint32_t buf_len)
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{
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MASS_DEBUG_DUMP;
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assert(NULL != urb);
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assert(NULL != buf);
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/* Mutual exclusion */
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if (URB_BUF_TYPE_DATA == buf_type) {
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urb->data = buf;
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urb->size = buf_len;
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} else if ( URB_BUF_TYPE_SETUP == buf_type ) {
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assert(sizeof(struct usb_ctrlrequest) == buf_len);
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urb->setup_packet = buf;
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} else
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panic("Unexpected buffer type!");
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}
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/*===========================================================================*
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* blocking_urb_submit *
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*===========================================================================*/
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int
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blocking_urb_submit(struct ddekit_usb_urb * urb, ddekit_sem_t * sem,
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int check_len)
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{
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MASS_DEBUG_DUMP;
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assert(NULL != urb);
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assert(NULL != sem);
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assert((check_len == URB_SUBMIT_CHECK_LEN) ||
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(check_len == URB_SUBMIT_ALLOW_MISMATCH));
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/* Submit and block until semaphore gets up */
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if (ddekit_usb_submit_urb(urb)) {
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MASS_MSG("Submitting DDEKit URB failed");
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return EXIT_FAILURE;
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} else {
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/* Submitting succeeded so block and wait for reply */
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ddekit_sem_down(sem);
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/* Check for DDEKit status first */
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if (urb->status) {
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MASS_MSG("Invalid DDEKit URB status");
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return EXIT_FAILURE;
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} else {
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if (URB_SUBMIT_CHECK_LEN == check_len) {
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/* Compare lengths */
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if (urb->actual_length != urb->size) {
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MASS_MSG("URB different than expected");
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return EXIT_FAILURE;
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}
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}
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return EXIT_SUCCESS;
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}
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}
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}
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