+// SPDX-License-Identifier: GPL-2.0-or-later
+
/***************************************************************************
* Copyright (C) 2007 by Juergen Stuber <juergen@jstuber.net> *
* based on Dominic Rath's and Benedikt Sauter's usbprog.c *
* *
* Copyright (C) 2015-2017 by Forest Crossman *
* cyrozap@gmail.com *
- * *
- * 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
#define HID_COMMAND_CONFIGURE 0x8f
#define HID_COMMAND_BOOTLOADER 0xa0
-/* 512 bytes seems to work reliably */
-#define SWD_MAX_BUFFER_LENGTH 512
+/* 512 bytes seemed to work reliably.
+ * It works with both full queue of mostly reads or mostly writes.
+ *
+ * Unfortunately the commit 88f429ead019fd6df96ec15f0d897385f3cef0d0
+ * 5321: target/cortex_m: faster reading of all CPU registers
+ * revealed a serious Kitprog firmware problem:
+ * If the queue contains more than 63 transactions in the repeated pattern
+ * one write, two reads, the firmware fails badly.
+ * Sending 64 transactions makes the adapter to loose the connection with the
+ * device. Sending 65 or more transactions causes the adapter to stop
+ * receiving USB HID commands, next kitprog_hid_command() stops in hid_write().
+ *
+ * The problem was detected with KitProg v2.12 and v2.16.
+ * We can guess the problem is something like a buffer or stack overflow.
+ *
+ * Use shorter buffer as a workaround. 300 bytes (= 60 transactions) works.
+ */
+#define SWD_MAX_BUFFER_LENGTH 300
struct kitprog {
hid_device *hid_handle;
void *buffer;
};
-static char *kitprog_serial;
static bool kitprog_init_acquire_psoc;
static int pending_transfer_count, pending_queue_len;
int retval;
kitprog_handle = malloc(sizeof(struct kitprog));
- if (kitprog_handle == NULL) {
+ if (!kitprog_handle) {
LOG_ERROR("Failed to allocate memory");
return ERROR_FAIL;
}
/* Allocate packet buffers and queues */
kitprog_handle->packet_size = SWD_MAX_BUFFER_LENGTH;
kitprog_handle->packet_buffer = malloc(SWD_MAX_BUFFER_LENGTH);
- if (kitprog_handle->packet_buffer == NULL) {
+ if (!kitprog_handle->packet_buffer) {
LOG_ERROR("Failed to allocate memory for the packet buffer");
return ERROR_FAIL;
}
pending_queue_len = SWD_MAX_BUFFER_LENGTH / 5;
pending_transfers = malloc(pending_queue_len * sizeof(*pending_transfers));
- if (pending_transfers == NULL) {
+ if (!pending_transfers) {
LOG_ERROR("Failed to allocate memory for the SWD transfer queue");
return ERROR_FAIL;
}
free(kitprog_handle->packet_buffer);
free(kitprog_handle->serial);
free(kitprog_handle);
- free(kitprog_serial);
free(pending_transfers);
return ERROR_OK;
/* Allocate memory for the serial number */
kitprog_handle->serial = calloc(retval + 1, sizeof(char));
- if (kitprog_handle->serial == NULL) {
+ if (!kitprog_handle->serial) {
LOG_ERROR("Failed to allocate memory for the serial number");
return ERROR_FAIL;
}
const uint16_t vids[] = { VID, 0 };
const uint16_t pids[] = { PID, 0 };
- if (jtag_libusb_open(vids, pids, kitprog_serial,
- &kitprog_handle->usb_handle, NULL) != ERROR_OK) {
+ if (jtag_libusb_open(vids, pids, &kitprog_handle->usb_handle, NULL) != ERROR_OK) {
LOG_ERROR("Failed to open or find the device");
return ERROR_FAIL;
}
/* Convert the ASCII serial number into a (wchar_t *) */
size_t len = strlen(kitprog_handle->serial);
wchar_t *hid_serial = calloc(len + 1, sizeof(wchar_t));
- if (hid_serial == NULL) {
+ if (!hid_serial) {
LOG_ERROR("Failed to allocate memory for the serial number");
return ERROR_FAIL;
}
/* Use HID for the KitBridge interface */
kitprog_handle->hid_handle = hid_open(VID, PID, hid_serial);
free(hid_serial);
- if (kitprog_handle->hid_handle == NULL) {
+ if (!kitprog_handle->hid_handle) {
LOG_ERROR("Failed to open KitBridge (HID) interface");
return ERROR_FAIL;
}
static void kitprog_usb_close(void)
{
- if (kitprog_handle->hid_handle != NULL) {
+ if (kitprog_handle->hid_handle) {
hid_close(kitprog_handle->hid_handle);
hid_exit();
}
return ERROR_FAIL;
}
- ret = hid_read(kitprog_handle->hid_handle, data, data_length);
- if (ret < 0) {
- LOG_DEBUG("HID read returned %i", ret);
+ ret = hid_read_timeout(kitprog_handle->hid_handle,
+ data, data_length, LIBUSB_TIMEOUT_MS);
+ if (ret == 0) {
+ LOG_ERROR("HID read timed out");
+ return ERROR_TIMEOUT_REACHED;
+ } else if (ret < 0) {
+ LOG_ERROR("HID read error %ls", hid_error(kitprog_handle->hid_handle));
return ERROR_FAIL;
}
return retval;
}
-COMMAND_HANDLER(kitprog_handle_serial_command)
-{
- if (CMD_ARGC == 1) {
- kitprog_serial = strdup(CMD_ARGV[0]);
- if (kitprog_serial == NULL) {
- LOG_ERROR("Failed to allocate memory for the serial number");
- return ERROR_FAIL;
- }
- } else {
- LOG_ERROR("expected exactly one argument to kitprog_serial <serial-number>");
- return ERROR_FAIL;
- }
-
- return ERROR_OK;
-}
-
COMMAND_HANDLER(kitprog_handle_init_acquire_psoc_command)
{
kitprog_init_acquire_psoc = true;
.usage = "<cmd>",
.chain = kitprog_subcommand_handlers,
},
- {
- .name = "kitprog_serial",
- .handler = &kitprog_handle_serial_command,
- .mode = COMMAND_CONFIG,
- .help = "set the serial number of the adapter",
- .usage = "serial_string",
- },
{
.name = "kitprog_init_acquire_psoc",
.handler = &kitprog_handle_init_acquire_psoc_command,
projects / fw / openocd / blobdiff