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#include <stdlib.h>
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2
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#include <stdio.h>
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3
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#include <unistd.h>
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4
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#include <errno.h>
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#include <usb.h>
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#include <sys/ioctl.h>
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#include "usb.h"
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#include <linux/usbdevice_fs.h>
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9
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10
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#define MAX_READ_WRITE 4096
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11
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#define USB_ERROR_STR(ret, x, args...) return ret
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13
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static int usb_get_fd(usb_dev_handle *uh)
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{
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return *((int *)uh);
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}
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18
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int __usb_bulk_write(usb_dev_handle *dev, int ep, char *bytes, int length,
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20
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int timeout)
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{
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struct usbdevfs_bulktransfer bulk;
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int ret, sent = 0;
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24
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/* Ensure the endpoint address is correct */
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ep &= ~USB_ENDPOINT_IN;
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do {
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bulk.ep = ep;
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bulk.len = length - sent;
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if (bulk.len > MAX_READ_WRITE)
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bulk.len = MAX_READ_WRITE;
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bulk.timeout = timeout;
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bulk.data = (unsigned char *)bytes + sent;
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35
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ret = ioctl(usb_get_fd(dev), USBDEVFS_BULK, &bulk);
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if (ret < 0)
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USB_ERROR_STR(ret,
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"error writing to bulk endpoint %d: %s",
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ep, strerror(errno));
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41
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sent += ret;
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} while (ret > 0 && sent < length);
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return sent;
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}
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int __usb_bulk_read(usb_dev_handle *dev, int ep, char *bytes, int size,
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49
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int timeout)
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50
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{
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51
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struct usbdevfs_bulktransfer bulk;
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52
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int ret, retrieved = 0, requested;
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53
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/* Ensure the endpoint address is correct */
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ep |= USB_ENDPOINT_IN;
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56
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do {
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bulk.ep = ep;
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requested = size - retrieved;
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if (requested > MAX_READ_WRITE)
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requested = MAX_READ_WRITE;
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bulk.len = requested;
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bulk.timeout = timeout;
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bulk.data = (unsigned char *)bytes + retrieved;
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ret = ioctl(usb_get_fd(dev), USBDEVFS_BULK, &bulk);
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if (ret < 0)
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USB_ERROR_STR(ret,
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"error reading from bulk endpoint 0x%x: %s",
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ep, strerror(errno));
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71
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retrieved += ret;
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} while (ret > 0 && retrieved < size && ret == requested);
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74
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return retrieved;
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}
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77
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78
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int __usb_reattach_kernel_driver_np(usb_dev_handle *dev, int interface)
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79
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{
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struct usbdevfs_ioctl command;
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81
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command.ifno = interface;
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command.ioctl_code = USBDEVFS_CONNECT;
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command.data = NULL;
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85
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return ioctl(usb_get_fd(dev), USBDEVFS_IOCTL, &command);
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87
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}
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