src/jtag/drivers/libusb0_common.c

   1 /***************************************************************************
   2  *   Copyright (C) 2009 by Zachary T Welch <zw@superlucidity.net>          *
   3  *                                                                         *
   4  *   Copyright (C) 2011 by Mauro Gamba <maurillo71@gmail.com>              *
   5  *                                                                         *
   6  *   This program is free software; you can redistribute it and/or modify  *
   7  *   it under the terms of the GNU General Public License as published by  *
   8  *   the Free Software Foundation; either version 2 of the License, or     *
   9  *   (at your option) any later version.                                   *
  10  *                                                                         *
  11  *   This program is distributed in the hope that it will be useful,       *
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  14  *   GNU General Public License for more details.                          *
  15  *                                                                         *
  16  *   You should have received a copy of the GNU General Public License     *
  17  *   along with this program; if not, write to the                         *
  18  *   Free Software Foundation, Inc.,                                       *
  19  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
  20  ***************************************************************************/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include "config.h"
  24 #endif
  25 #include "log.h"
  26 #include "libusb0_common.h"
  27
  28 static bool jtag_libusb_match(struct jtag_libusb_device *dev,
  29                 const uint16_t vids[], const uint16_t pids[])
  30 {
  31         for (unsigned i = 0; vids[i]; i++) {
  32                 if (dev->descriptor.idVendor == vids[i] &&
  33                         dev->descriptor.idProduct == pids[i]) {
  34                         return true;
  35                 }
  36         }
  37         return false;
  38 }
  39
  40 int jtag_libusb_open(const uint16_t vids[], const uint16_t pids[],
  41                 struct jtag_libusb_device_handle **out)
  42 {
  43         usb_init();
  44
  45         usb_find_busses();
  46         usb_find_devices();
  47
  48         struct usb_bus *busses = usb_get_busses();
  49         for (struct usb_bus *bus = busses; bus; bus = bus->next) {
  50                 for (struct usb_device *dev = bus->devices;
  51                                 dev; dev = dev->next) {
  52                         if (!jtag_libusb_match(dev, vids, pids))
  53                                 continue;
  54
  55                         *out = usb_open(dev);
  56                         if (NULL == *out)
  57                                 return -errno;
  58                         return 0;
  59                 }
  60         }
  61         return -ENODEV;
  62 }
  63
  64 void jtag_libusb_close(jtag_libusb_device_handle *dev)
  65 {
  66         /* Close device */
  67         usb_close(dev);
  68 }
  69
  70 int jtag_libusb_control_transfer(jtag_libusb_device_handle *dev, uint8_t requestType,
  71                 uint8_t request, uint16_t wValue, uint16_t wIndex, char *bytes,
  72                 uint16_t size, unsigned int timeout)
  73 {
  74         int transferred = 0;
  75
  76         transferred = usb_control_msg(dev, requestType, request, wValue, wIndex,
  77                                 bytes, size, timeout);
  78
  79         if (transferred < 0)
  80                 transferred = 0;
  81
  82         return transferred;
  83 }
  84
  85 int jtag_libusb_bulk_write(jtag_libusb_device_handle *dev, int ep, char *bytes,
  86                 int size, int timeout)
  87 {
  88         return usb_bulk_write(dev, ep, bytes, size, timeout);
  89 }
  90
  91 int jtag_libusb_bulk_read(jtag_libusb_device_handle *dev, int ep, char *bytes,
  92                 int size, int timeout)
  93 {
  94         return usb_bulk_read(dev, ep, bytes, size, timeout);
  95 }
  96
  97 int jtag_libusb_set_configuration(jtag_libusb_device_handle *devh,
  98                 int configuration)
  99 {
 100         struct jtag_libusb_device *udev = jtag_libusb_get_device(devh);
 101
 102         return usb_set_configuration(devh,
 103                         udev->config[configuration].bConfigurationValue);
 104 }
 105
 106 int jtag_libusb_get_endpoints(struct jtag_libusb_device *udev,
 107                 unsigned int *usb_read_ep,
 108                 unsigned int *usb_write_ep)
 109 {
 110         struct usb_interface *iface = udev->config->interface;
 111         struct usb_interface_descriptor *desc = iface->altsetting;
 112
 113         for (int i = 0; i < desc->bNumEndpoints; i++) {
 114                 uint8_t epnum = desc->endpoint[i].bEndpointAddress;
 115                 bool is_input = epnum & 0x80;
 116                 LOG_DEBUG("usb ep %s %02x", is_input ? "in" : "out", epnum);
 117                 if (is_input)
 118                         *usb_read_ep = epnum;
 119                 else
 120                         *usb_write_ep = epnum;
 121         }
 122
 123         return 0;
 124 }