Duplicate RF2500 transport for HIDAPI backend
This commit is contained in:
Emmanuel Blot
parent
0666a32517
commit
587dbf1516
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/* MSPDebug - debugging tool for the eZ430
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* Copyright (C) 2009-2012 Daniel Beer
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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 <stdlib.h>
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#include <string.h>
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#ifndef __Windows__
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#include <usb.h>
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#else
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#include <lusb0_usb.h>
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#endif
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#include "rf2500.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 rf2500_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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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 0x0451
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#define USB_FET_PRODUCT 0xf432
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#define USB_FET_INTERFACE_CLASS 3
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#define USB_FET_IN_EP 0x81
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#define USB_FET_OUT_EP 0x01
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static int open_interface(struct rf2500_transport *tr,
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struct usb_device *dev, int ino)
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{
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printc_dbg("Trying to open interface %d on %s\n", 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("rf2500: 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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if (usb_detach_kernel_driver_np(tr->handle, tr->int_number) < 0)
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pr_error("rf2500: warning: can't "
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"detach kernel driver");
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#endif
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#ifdef __Windows__
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if (usb_set_configuration(tr->handle, 1) < 0) {
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pr_error("rf2500: can't set configuration 1");
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usb_close(tr->handle);
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return -1;
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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("rf2500: 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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return 0;
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}
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static int open_device(struct rf2500_transport *tr,
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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 == USB_FET_INTERFACE_CLASS &&
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!open_interface(tr, dev, desc->bInterfaceNumber))
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return 0;
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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 rf2500_transport *tr = (struct rf2500_transport *)tr_base;
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while (len) {
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uint8_t pbuf[256];
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int plen = len > 255 ? 255 : len;
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int txlen = plen + 1;
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memcpy(pbuf + 1, data, plen);
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/* This padding is needed to work around an apparent bug in
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* the RF2500 FET. Without this, the device hangs.
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*/
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if (txlen > 32 && (txlen & 0x3f))
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while (txlen < 255 && (txlen & 0x3f))
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pbuf[txlen++] = 0xff;
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else if (txlen > 16 && (txlen & 0xf))
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while (txlen < 255 && (txlen & 0xf) != 1)
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pbuf[txlen++] = 0xff;
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pbuf[0] = txlen - 1;
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#ifdef DEBUG_USBTR
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debug_hexdump("USB transfer out", pbuf, txlen);
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#endif
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if (usb_bulk_write(tr->handle, USB_FET_OUT_EP,
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(char *)pbuf, txlen, 10000) < 0) {
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pr_error("rf2500: can't send data");
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return -1;
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}
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data += plen;
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len -= plen;
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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 rf2500_transport *tr = (struct rf2500_transport *)tr_base;
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int rlen;
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if (tr->offset >= tr->len) {
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if (usb_bulk_read(tr->handle, USB_FET_IN_EP,
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(char *)tr->buf, sizeof(tr->buf),
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10000) < 0) {
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pr_error("rf2500: can't receive data");
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return -1;
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}
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#ifdef DEBUG_USBTR
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debug_hexdump("USB transfer in", tr->buf, 64);
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#endif
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tr->len = tr->buf[1] + 2;
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if (tr->len > sizeof(tr->buf))
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tr->len = sizeof(tr->buf);
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tr->offset = 2;
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}
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rlen = tr->len - tr->offset;
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if (rlen > max_len)
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rlen = max_len;
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memcpy(databuf, tr->buf + tr->offset, rlen);
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tr->offset += rlen;
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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 rf2500_transport *tr = (struct rf2500_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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static int usbtr_flush(transport_t tr_base)
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{
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struct rf2500_transport *tr = (struct rf2500_transport *)tr_base;
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#if !defined(__APPLE__) && !defined(__sun__)
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char buf[64];
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/* Flush out lingering data.
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*
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* The timeout apparently doesn't work on OS/X, and this loop
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* just hangs once the endpoint buffer empties.
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*/
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while (usb_bulk_read(tr->handle, USB_FET_IN_EP,
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buf, sizeof(buf),
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100) > 0);
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#endif
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tr->len = 0;
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tr->offset = 0;
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return 0;
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}
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static int usbtr_set_modem(transport_t tr_base, transport_modem_t state)
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{
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printc_err("rf2500: unsupported operation: set_modem\n");
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return -1;
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}
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static const struct transport_class rf2500_transport = {
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.destroy = usbtr_destroy,
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.send = usbtr_send,
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.recv = usbtr_recv,
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.flush = usbtr_flush,
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.set_modem = usbtr_set_modem
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};
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transport_t rf2500_open(const char *devpath, const char *requested_serial)
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{
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struct rf2500_transport *tr = malloc(sizeof(*tr));
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struct usb_device *dev;
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if (!tr) {
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pr_error("rf2500: can't allocate memory");
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return NULL;
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}
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memset(tr, 0, sizeof(*tr));
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tr->base.ops = &rf2500_transport;
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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, USB_FET_PRODUCT,
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requested_serial);
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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("rf2500: failed to open RF2500 device\n");
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free(tr);
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return NULL;
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}
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usbtr_flush(&tr->base);
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return (transport_t)tr;
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}
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