--- /dev/null
+/***************************************************************************
+ * Copyright (C) 2018 by Mickaël Thomas *
+ * mickael9@gmail.com *
+ * *
+ * Copyright (C) 2016 by Maksym Hilliaka *
+ * oter@frozen-team.com *
+ * *
+ * Copyright (C) 2016 by Phillip Pearson *
+ * pp@myelin.co.nz *
+ * *
+ * Copyright (C) 2014 by Paul Fertser *
+ * fercerpav@gmail.com *
+ * *
+ * Copyright (C) 2013 by mike brown *
+ * mike@theshedworks.org.uk *
+ * *
+ * Copyright (C) 2013 by Spencer Oliver *
+ * spen@spen-soft.co.uk *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>. *
+ ***************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <hidapi.h>
+#include <helper/log.h>
+
+#include "cmsis_dap.h"
+
+#define PACKET_SIZE (64 + 1) /* 64 bytes plus report id */
+
+struct cmsis_dap_backend_data {
+ hid_device *dev_handle;
+};
+
+static int cmsis_dap_hid_open(struct cmsis_dap *dap, uint16_t vids[], uint16_t pids[], char *serial)
+{
+ hid_device *dev = NULL;
+ int i;
+ struct hid_device_info *devs, *cur_dev;
+ unsigned short target_vid, target_pid;
+
+ target_vid = 0;
+ target_pid = 0;
+
+ if (hid_init() != 0) {
+ LOG_ERROR("unable to open HIDAPI");
+ return ERROR_FAIL;
+ }
+
+ /*
+ * The CMSIS-DAP specification stipulates:
+ * "The Product String must contain "CMSIS-DAP" somewhere in the string. This is used by the
+ * debuggers to identify a CMSIS-DAP compliant Debug Unit that is connected to a host computer."
+ */
+ devs = hid_enumerate(0x0, 0x0);
+ cur_dev = devs;
+ while (NULL != cur_dev) {
+ bool found = false;
+
+ if (0 == vids[0]) {
+ if (NULL == cur_dev->product_string) {
+ LOG_DEBUG("Cannot read product string of device 0x%x:0x%x",
+ cur_dev->vendor_id, cur_dev->product_id);
+ } else if (wcsstr(cur_dev->product_string, L"CMSIS-DAP")) {
+ /* if the user hasn't specified VID:PID *and*
+ * product string contains "CMSIS-DAP", pick it
+ */
+ found = true;
+ }
+ } else {
+ /* otherwise, exhaustively compare against all VID:PID in list */
+ for (i = 0; vids[i] || pids[i]; i++) {
+ if ((vids[i] == cur_dev->vendor_id) && (pids[i] == cur_dev->product_id))
+ found = true;
+ }
+ }
+
+ /* LPC-LINK2 has cmsis-dap on interface 0 and other HID functions on other interfaces */
+ if (cur_dev->vendor_id == 0x1fc9 && cur_dev->product_id == 0x0090 && cur_dev->interface_number != 0)
+ found = false;
+
+ if (found) {
+ /* check serial number matches if given */
+ if (serial == NULL)
+ break;
+
+ if (cur_dev->serial_number != NULL) {
+ size_t len = (strlen(serial) + 1) * sizeof(wchar_t);
+ wchar_t *wserial = malloc(len);
+ mbstowcs(wserial, serial, len);
+
+ if (wcscmp(wserial, cur_dev->serial_number) == 0) {
+ free(wserial);
+ break;
+ } else {
+ free(wserial);
+ wserial = NULL;
+ }
+ }
+ }
+
+ cur_dev = cur_dev->next;
+ }
+
+ if (NULL != cur_dev) {
+ target_vid = cur_dev->vendor_id;
+ target_pid = cur_dev->product_id;
+ }
+
+ if (target_vid == 0 && target_pid == 0) {
+ hid_free_enumeration(devs);
+ return ERROR_FAIL;
+ }
+
+ dap->bdata = malloc(sizeof(struct cmsis_dap_backend_data));
+ if (dap->bdata == NULL) {
+ LOG_ERROR("unable to allocate memory");
+ return ERROR_FAIL;
+ }
+
+ dev = hid_open_path(cur_dev->path);
+ hid_free_enumeration(devs);
+
+ if (dev == NULL) {
+ LOG_ERROR("unable to open CMSIS-DAP device 0x%x:0x%x", target_vid, target_pid);
+ return ERROR_FAIL;
+ }
+
+ /* allocate default packet buffer, may be changed later.
+ * currently with HIDAPI we have no way of getting the output report length
+ * without this info we cannot communicate with the adapter.
+ * For the moment we have to hard code the packet size */
+
+ dap->packet_size = PACKET_SIZE;
+
+ /* atmel cmsis-dap uses 512 byte reports */
+ /* except when it doesn't e.g. with mEDBG on SAMD10 Xplained
+ * board */
+ /* TODO: HID report descriptor should be parsed instead of
+ * hardcoding a match by VID */
+ if (target_vid == 0x03eb && target_pid != 0x2145 && target_pid != 0x2175)
+ dap->packet_size = 512 + 1;
+
+ dap->bdata->dev_handle = dev;
+
+ return ERROR_OK;
+}
+
+static void cmsis_dap_hid_close(struct cmsis_dap *dap)
+{
+ hid_close(dap->bdata->dev_handle);
+ hid_exit();
+ free(dap->bdata);
+ dap->bdata = NULL;
+}
+
+static int cmsis_dap_hid_read(struct cmsis_dap *dap, int timeout_ms)
+{
+ int retval = hid_read_timeout(dap->bdata->dev_handle, dap->packet_buffer, dap->packet_size, timeout_ms);
+
+ if (retval == 0) {
+ return ERROR_TIMEOUT_REACHED;
+ } else if (retval == -1) {
+ LOG_ERROR("error reading data: %ls", hid_error(dap->bdata->dev_handle));
+ return ERROR_FAIL;
+ }
+
+ return retval;
+}
+
+static int cmsis_dap_hid_write(struct cmsis_dap *dap, int txlen, int timeout_ms)
+{
+ (void) timeout_ms;
+
+ /* Pad the rest of the TX buffer with 0's */
+ memset(dap->packet_buffer + txlen, 0, dap->packet_size - txlen);
+
+ /* write data to device */
+ int retval = hid_write(dap->bdata->dev_handle, dap->packet_buffer, dap->packet_size);
+ if (retval == -1) {
+ LOG_ERROR("error writing data: %ls", hid_error(dap->bdata->dev_handle));
+ return ERROR_FAIL;
+ }
+
+ return retval;
+}
+
+const struct cmsis_dap_backend cmsis_dap_hid_backend = {
+ .name = "hid",
+ .open = cmsis_dap_hid_open,
+ .close = cmsis_dap_hid_close,
+ .read = cmsis_dap_hid_read,
+ .write = cmsis_dap_hid_write,
+};
Code Review / openocd.git / blobdiff