270 lines
6.5 KiB
C
270 lines
6.5 KiB
C
/* MSPDebug - debugging tool for the eZ430
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* Copyright (C) 2009-2011 Daniel Beer
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* Copyright (C) 2010 Peter Jansen
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdio.h>
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#include <string.h>
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#include <usb.h>
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#include "olimex.h"
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#include "util.h"
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#include "usbutil.h"
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#include "output.h"
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struct olimex_transport {
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struct transport base;
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int int_number;
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struct usb_dev_handle *handle;
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int in_ep;
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int out_ep;
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uint8_t buf[64];
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int len;
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int offset;
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};
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/*********************************************************************
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* USB transport
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*
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* These functions handle the details of slicing data over USB
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* transfers. The interface presented is a continuous byte stream with
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* no slicing codes.
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*
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* Writes are unbuffered -- a single write translates to at least
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* one transfer.
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*/
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#define USB_FET_VENDOR 0x15ba
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#define V1_PRODUCT 0x0002
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#define V1_INTERFACE_CLASS 255
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#define V1_IN_EP 0x81
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#define V1_OUT_EP 0x01
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#define V2_PRODUCT 0x0031
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#define V2_INTERFACE_CLASS 10
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#define V2_IN_EP 0x82
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#define V2_OUT_EP 0x02
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#define CP210x_REQTYPE_HOST_TO_DEVICE 0x41
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#define CP210X_IFC_ENABLE 0x00
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#define CP210X_SET_BAUDDIV 0x01
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#define CP210X_SET_MHS 0x07
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#define TIMEOUT 10000
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static int open_interface(struct olimex_transport *tr,
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struct usb_device *dev, int ino)
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{
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#if defined(__linux__)
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int drv;
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char drName[256];
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#endif
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printc(__FILE__": Trying to open interface %d on %s\n",
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ino, dev->filename);
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tr->int_number = ino;
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tr->handle = usb_open(dev);
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if (!tr->handle) {
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pr_error(__FILE__": can't open device");
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return -1;
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}
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#if defined(__linux__)
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drv = usb_get_driver_np(tr->handle, tr->int_number, drName,
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sizeof(drName));
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printc(__FILE__" : driver %d\n", drv);
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if (drv >= 0) {
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if (usb_detach_kernel_driver_np(tr->handle,
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tr->int_number) < 0)
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pr_error(__FILE__": warning: can't detach "
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"kernel driver");
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}
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#endif
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if (usb_claim_interface(tr->handle, tr->int_number) < 0) {
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pr_error(__FILE__": can't claim interface");
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usb_close(tr->handle);
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return -1;
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}
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int ret = usb_control_msg(tr->handle, CP210x_REQTYPE_HOST_TO_DEVICE,
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CP210X_IFC_ENABLE, 0x1, 0, NULL, 0, 300);
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#ifdef DEBUG_OLIMEX
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printc(__FILE__": %s : Sending control message ret %d\n",
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__FUNCTION__, ret);
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#endif
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/* Set the baud rate to 500000 bps */
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ret = usb_control_msg(tr->handle, CP210x_REQTYPE_HOST_TO_DEVICE,
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CP210X_SET_BAUDDIV, 0x7, 0, NULL, 0, 300);
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#ifdef DEBUG_OLIMEX
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printc(__FILE__": %s : Sending control message ret %d\n",
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__FUNCTION__, ret);
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#endif
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/* Set the modem control settings.
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* Set RTS, DTR and WRITE_DTR, WRITE_RTS
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*/
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ret = usb_control_msg(tr->handle, CP210x_REQTYPE_HOST_TO_DEVICE,
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CP210X_SET_MHS, 0x303, 0, NULL, 0, 300);
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#ifdef DEBUG_OLIMEX
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printc(__FILE__": %s : Sending control message ret %d\n",
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__FUNCTION__, ret);
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#endif
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return 0;
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}
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static int open_device(struct olimex_transport *tr, struct usb_device *dev)
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{
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struct usb_config_descriptor *c = &dev->config[0];
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int i;
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for (i = 0; i < c->bNumInterfaces; i++) {
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struct usb_interface *intf = &c->interface[i];
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struct usb_interface_descriptor *desc = &intf->altsetting[0];
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if (desc->bInterfaceClass == V1_INTERFACE_CLASS &&
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!open_interface(tr, dev, desc->bInterfaceNumber)) {
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printc_dbg("olimex: rev 1 device\n");
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tr->in_ep = V1_IN_EP;
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tr->out_ep = V1_OUT_EP;
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return 0;
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} else if (desc->bInterfaceClass == V2_INTERFACE_CLASS &&
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!open_interface(tr, dev, desc->bInterfaceNumber)) {
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printc_dbg("olimex: rev 2 device\n");
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tr->in_ep = V2_IN_EP;
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tr->out_ep = V2_OUT_EP;
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return 0;
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}
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}
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return -1;
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}
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static int usbtr_send(transport_t tr_base, const uint8_t *data, int len)
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{
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struct olimex_transport *tr = (struct olimex_transport *)tr_base;
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int sent;
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while (len) {
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#ifdef DEBUG_OLIMEX
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debug_hexdump(__FILE__": USB transfer out", data, len);
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#endif
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sent = usb_bulk_write(tr->handle, tr->out_ep,
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(char *)data, len, TIMEOUT);
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if (sent < 0) {
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pr_error(__FILE__": can't send data");
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return -1;
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}
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len -= sent;
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}
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return 0;
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}
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static int usbtr_recv(transport_t tr_base, uint8_t *databuf, int max_len)
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{
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struct olimex_transport *tr = (struct olimex_transport *)tr_base;
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int rlen;
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#ifdef DEBUG_OLIMEX
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printc(__FILE__": %s : read max %d\n", __FUNCTION__, max_len);
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#endif
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rlen = usb_bulk_read(tr->handle, tr->in_ep, (char *)databuf,
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max_len, TIMEOUT);
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#ifdef DEBUG_OLIMEX
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printc(__FILE__": %s : read %d\n", __FUNCTION__, rlen);
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#endif
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if (rlen < 0) {
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pr_error(__FILE__": can't receive data");
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return -1;
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}
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#ifdef DEBUG_OLIMEX
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debug_hexdump(__FILE__": USB transfer in", databuf, rlen);
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#endif
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return rlen;
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}
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static void usbtr_destroy(transport_t tr_base)
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{
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struct olimex_transport *tr = (struct olimex_transport *)tr_base;
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usb_release_interface(tr->handle, tr->int_number);
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usb_close(tr->handle);
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free(tr);
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}
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transport_t olimex_open(const char *devpath, const char *requested_serial)
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{
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struct olimex_transport *tr = malloc(sizeof(*tr));
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struct usb_device *dev;
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char buf[64];
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if (!tr) {
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pr_error(__FILE__": can't allocate memory");
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return NULL;
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}
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tr->base.destroy = usbtr_destroy;
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tr->base.send = usbtr_send;
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tr->base.recv = usbtr_recv;
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usb_init();
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usb_find_busses();
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usb_find_devices();
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if (devpath) {
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dev = usbutil_find_by_loc(devpath);
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} else {
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dev = usbutil_find_by_id(USB_FET_VENDOR, V1_PRODUCT,
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requested_serial);
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if (!dev)
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dev = usbutil_find_by_id(USB_FET_VENDOR, V2_PRODUCT,
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requested_serial);
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}
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if (!dev) {
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free(tr);
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return NULL;
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}
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if (open_device(tr, dev) < 0) {
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printc_err(__FILE__ ": failed to open Olimex device\n");
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return NULL;
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}
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/* Flush out lingering data */
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while (usb_bulk_read(tr->handle, tr->in_ep,
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buf, sizeof(buf),
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100) >= 0);
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return (transport_t)tr;
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}
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