X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Fjtag%2Fdrivers%2Fmpsse.c;h=0ef88ba2d57c1b0410a77067d7b66ebb2d2d05e8;hp=82703bf341c73d53889f554bd6affea1abcd6668;hb=d0e763ac7ef6aa17b17bd00ccdfbccfb4eacda69;hpb=71ee5f6b5f3172901135640de4ca827b14747465
diff --git a/src/jtag/drivers/mpsse.c b/src/jtag/drivers/mpsse.c
index 82703bf341..0ef88ba2d5 100644
--- a/src/jtag/drivers/mpsse.c
+++ b/src/jtag/drivers/mpsse.c
@@ -13,9 +13,7 @@
* 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, write to the *
- * Free Software Foundation, Inc., *
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
+ * along with this program. If not, see . *
***************************************************************************/
#ifdef HAVE_CONFIG_H
@@ -24,7 +22,7 @@
#include "mpsse.h"
#include "helper/log.h"
-#include
+#include
/* Compatibility define for older libusb-1.0 */
#ifndef LIBUSB_CALL
@@ -86,6 +84,7 @@ struct mpsse_ctx {
uint8_t *read_chunk;
unsigned read_chunk_size;
struct bit_copy_queue read_queue;
+ int retval;
};
/* Returns true if the string descriptor indexed by str_index in device matches string */
@@ -97,18 +96,73 @@ static bool string_descriptor_equal(libusb_device_handle *device, uint8_t str_in
retval = libusb_get_string_descriptor_ascii(device, str_index, (unsigned char *)desc_string,
sizeof(desc_string));
if (retval < 0) {
- LOG_ERROR("libusb_get_string_descriptor_ascii() failed with %d", retval);
+ LOG_ERROR("libusb_get_string_descriptor_ascii() failed with %s", libusb_error_name(retval));
return false;
}
return strncmp(string, desc_string, sizeof(desc_string)) == 0;
}
+static bool device_location_equal(libusb_device *device, const char *location)
+{
+ bool result = false;
+#ifdef HAVE_LIBUSB_GET_PORT_NUMBERS
+ char *loc = strdup(location);
+ uint8_t port_path[7];
+ int path_step, path_len;
+ uint8_t dev_bus = libusb_get_bus_number(device);
+ char *ptr;
+
+ path_len = libusb_get_port_numbers(device, port_path, 7);
+ if (path_len == LIBUSB_ERROR_OVERFLOW) {
+ LOG_ERROR("cannot determine path to usb device! (more than 7 ports in path)");
+ goto done;
+ }
+
+ LOG_DEBUG("device path has %i steps", path_len);
+
+ ptr = strtok(loc, ":");
+ if (ptr == NULL) {
+ LOG_DEBUG("no ':' in path");
+ goto done;
+ }
+ if (atoi(ptr) != dev_bus) {
+ LOG_DEBUG("bus mismatch");
+ goto done;
+ }
+
+ path_step = 0;
+ while (path_step < 7) {
+ ptr = strtok(NULL, ",");
+ if (ptr == NULL) {
+ LOG_DEBUG("no more tokens in path at step %i", path_step);
+ break;
+ }
+
+ if (path_step < path_len
+ && atoi(ptr) != port_path[path_step]) {
+ LOG_DEBUG("path mismatch at step %i", path_step);
+ break;
+ }
+
+ path_step++;
+ };
+
+ /* walked the full path, all elements match */
+ if (path_step == path_len)
+ result = true;
+
+ done:
+ free(loc);
+#endif
+ return result;
+}
+
/* Helper to open a libusb device that matches vid, pid, product string and/or serial string.
* Set any field to 0 as a wildcard. If the device is found true is returned, with ctx containing
* the already opened handle. ctx->interface must be set to the desired interface (channel) number
* prior to calling this function. */
static bool open_matching_device(struct mpsse_ctx *ctx, const uint16_t *vid, const uint16_t *pid,
- const char *product, const char *serial)
+ const char *product, const char *serial, const char *location)
{
libusb_device **list;
struct libusb_device_descriptor desc;
@@ -117,14 +171,14 @@ static bool open_matching_device(struct mpsse_ctx *ctx, const uint16_t *vid, con
bool found = false;
ssize_t cnt = libusb_get_device_list(ctx->usb_ctx, &list);
if (cnt < 0)
- LOG_ERROR("libusb_get_device_list() failed with %zi", cnt);
+ LOG_ERROR("libusb_get_device_list() failed with %s", libusb_error_name(cnt));
for (ssize_t i = 0; i < cnt; i++) {
libusb_device *device = list[i];
err = libusb_get_device_descriptor(device, &desc);
if (err != LIBUSB_SUCCESS) {
- LOG_ERROR("libusb_get_device_descriptor() failed with %d", err);
+ LOG_ERROR("libusb_get_device_descriptor() failed with %s", libusb_error_name(err));
continue;
}
@@ -140,6 +194,11 @@ static bool open_matching_device(struct mpsse_ctx *ctx, const uint16_t *vid, con
continue;
}
+ if (location && !device_location_equal(device, location)) {
+ libusb_close(ctx->usb_dev);
+ continue;
+ }
+
if (product && !string_descriptor_equal(ctx->usb_dev, desc.iProduct, product)) {
libusb_close(ctx->usb_dev);
continue;
@@ -163,7 +222,7 @@ static bool open_matching_device(struct mpsse_ctx *ctx, const uint16_t *vid, con
err = libusb_get_config_descriptor(libusb_get_device(ctx->usb_dev), 0, &config0);
if (err != LIBUSB_SUCCESS) {
- LOG_ERROR("libusb_get_config_descriptor() failed with %d", err);
+ LOG_ERROR("libusb_get_config_descriptor() failed with %s", libusb_error_name(err));
libusb_close(ctx->usb_dev);
return false;
}
@@ -172,14 +231,14 @@ static bool open_matching_device(struct mpsse_ctx *ctx, const uint16_t *vid, con
int cfg;
err = libusb_get_configuration(ctx->usb_dev, &cfg);
if (err != LIBUSB_SUCCESS) {
- LOG_ERROR("libusb_get_configuration() failed with %d", err);
+ LOG_ERROR("libusb_get_configuration() failed with %s", libusb_error_name(err));
goto error;
}
if (desc.bNumConfigurations > 0 && cfg != config0->bConfigurationValue) {
err = libusb_set_configuration(ctx->usb_dev, config0->bConfigurationValue);
if (err != LIBUSB_SUCCESS) {
- LOG_ERROR("libusb_set_configuration() failed with %d", err);
+ LOG_ERROR("libusb_set_configuration() failed with %s", libusb_error_name(err));
goto error;
}
}
@@ -188,13 +247,13 @@ static bool open_matching_device(struct mpsse_ctx *ctx, const uint16_t *vid, con
err = libusb_detach_kernel_driver(ctx->usb_dev, ctx->interface);
if (err != LIBUSB_SUCCESS && err != LIBUSB_ERROR_NOT_FOUND
&& err != LIBUSB_ERROR_NOT_SUPPORTED) {
- LOG_ERROR("libusb_detach_kernel_driver() failed with %d", err);
+ LOG_ERROR("libusb_detach_kernel_driver() failed with %s", libusb_error_name(err));
goto error;
}
err = libusb_claim_interface(ctx->usb_dev, ctx->interface);
if (err != LIBUSB_SUCCESS) {
- LOG_ERROR("libusb_claim_interface() failed with %d", err);
+ LOG_ERROR("libusb_claim_interface() failed with %s", libusb_error_name(err));
goto error;
}
@@ -203,7 +262,7 @@ static bool open_matching_device(struct mpsse_ctx *ctx, const uint16_t *vid, con
SIO_RESET_REQUEST, SIO_RESET_SIO,
ctx->index, NULL, 0, ctx->usb_write_timeout);
if (err < 0) {
- LOG_ERROR("failed to reset FTDI device: %d", err);
+ LOG_ERROR("failed to reset FTDI device: %s", libusb_error_name(err));
goto error;
}
@@ -262,7 +321,7 @@ error:
}
struct mpsse_ctx *mpsse_open(const uint16_t *vid, const uint16_t *pid, const char *description,
- const char *serial, int channel)
+ const char *serial, const char *location, int channel)
{
struct mpsse_ctx *ctx = calloc(1, sizeof(*ctx));
int err;
@@ -287,20 +346,21 @@ struct mpsse_ctx *mpsse_open(const uint16_t *vid, const uint16_t *pid, const cha
err = libusb_init(&ctx->usb_ctx);
if (err != LIBUSB_SUCCESS) {
- LOG_ERROR("libusb_init() failed with %d", err);
+ LOG_ERROR("libusb_init() failed with %s", libusb_error_name(err));
goto error;
}
- if (!open_matching_device(ctx, vid, pid, description, serial)) {
+ if (!open_matching_device(ctx, vid, pid, description, serial, location)) {
/* Four hex digits plus terminating zero each */
char vidstr[5];
char pidstr[5];
- LOG_ERROR("unable to open ftdi device with vid %s, pid %s, description '%s' and "
- "serial '%s'",
+ LOG_ERROR("unable to open ftdi device with vid %s, pid %s, description '%s', "
+ "serial '%s' at bus location '%s'",
vid ? sprintf(vidstr, "%04x", *vid), vidstr : "*",
pid ? sprintf(pidstr, "%04x", *pid), pidstr : "*",
description ? description : "*",
- serial ? serial : "*");
+ serial ? serial : "*",
+ location ? location : "*");
ctx->usb_dev = 0;
goto error;
}
@@ -309,7 +369,7 @@ struct mpsse_ctx *mpsse_open(const uint16_t *vid, const uint16_t *pid, const cha
SIO_SET_LATENCY_TIMER_REQUEST, 255, ctx->index, NULL, 0,
ctx->usb_write_timeout);
if (err < 0) {
- LOG_ERROR("unable to set latency timer: %d", err);
+ LOG_ERROR("unable to set latency timer: %s", libusb_error_name(err));
goto error;
}
@@ -322,7 +382,7 @@ struct mpsse_ctx *mpsse_open(const uint16_t *vid, const uint16_t *pid, const cha
0,
ctx->usb_write_timeout);
if (err < 0) {
- LOG_ERROR("unable to set MPSSE bitmode: %d", err);
+ LOG_ERROR("unable to set MPSSE bitmode: %s", libusb_error_name(err));
goto error;
}
@@ -362,18 +422,19 @@ void mpsse_purge(struct mpsse_ctx *ctx)
LOG_DEBUG("-");
ctx->write_count = 0;
ctx->read_count = 0;
+ ctx->retval = ERROR_OK;
bit_copy_discard(&ctx->read_queue);
err = libusb_control_transfer(ctx->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_RESET_REQUEST,
SIO_RESET_PURGE_RX, ctx->index, NULL, 0, ctx->usb_write_timeout);
if (err < 0) {
- LOG_ERROR("unable to purge ftdi rx buffers: %d", err);
+ LOG_ERROR("unable to purge ftdi rx buffers: %s", libusb_error_name(err));
return;
}
err = libusb_control_transfer(ctx->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_RESET_REQUEST,
SIO_RESET_PURGE_TX, ctx->index, NULL, 0, ctx->usb_write_timeout);
if (err < 0) {
- LOG_ERROR("unable to purge ftdi tx buffers: %d", err);
+ LOG_ERROR("unable to purge ftdi tx buffers: %s", libusb_error_name(err));
return;
}
}
@@ -417,24 +478,28 @@ static unsigned buffer_add_read(struct mpsse_ctx *ctx, uint8_t *in, unsigned in_
return bit_count;
}
-int mpsse_clock_data_out(struct mpsse_ctx *ctx, const uint8_t *out, unsigned out_offset,
+void mpsse_clock_data_out(struct mpsse_ctx *ctx, const uint8_t *out, unsigned out_offset,
unsigned length, uint8_t mode)
{
- return mpsse_clock_data(ctx, out, out_offset, 0, 0, length, mode);
+ mpsse_clock_data(ctx, out, out_offset, 0, 0, length, mode);
}
-int mpsse_clock_data_in(struct mpsse_ctx *ctx, uint8_t *in, unsigned in_offset, unsigned length,
+void mpsse_clock_data_in(struct mpsse_ctx *ctx, uint8_t *in, unsigned in_offset, unsigned length,
uint8_t mode)
{
- return mpsse_clock_data(ctx, 0, 0, in, in_offset, length, mode);
+ mpsse_clock_data(ctx, 0, 0, in, in_offset, length, mode);
}
-int mpsse_clock_data(struct mpsse_ctx *ctx, const uint8_t *out, unsigned out_offset, uint8_t *in,
+void mpsse_clock_data(struct mpsse_ctx *ctx, const uint8_t *out, unsigned out_offset, uint8_t *in,
unsigned in_offset, unsigned length, uint8_t mode)
{
/* TODO: Fix MSB first modes */
DEBUG_IO("%s%s %d bits", in ? "in" : "", out ? "out" : "", length);
- int retval = ERROR_OK;
+
+ if (ctx->retval != ERROR_OK) {
+ DEBUG_IO("Ignoring command due to previous error");
+ return;
+ }
/* TODO: On H chips, use command 0x8E/0x8F if in and out are both 0 */
if (out || (!out && !in))
@@ -446,7 +511,7 @@ int mpsse_clock_data(struct mpsse_ctx *ctx, const uint8_t *out, unsigned out_off
/* Guarantee buffer space enough for a minimum size transfer */
if (buffer_write_space(ctx) + (length < 8) < (out || (!out && !in) ? 4 : 3)
|| (in && buffer_read_space(ctx) < 1))
- retval = mpsse_flush(ctx);
+ ctx->retval = mpsse_flush(ctx);
if (length < 8) {
/* Transfer remaining bits in bit mode */
@@ -494,21 +559,24 @@ int mpsse_clock_data(struct mpsse_ctx *ctx, const uint8_t *out, unsigned out_off
}
}
}
- return retval;
}
-int mpsse_clock_tms_cs_out(struct mpsse_ctx *ctx, const uint8_t *out, unsigned out_offset,
+void mpsse_clock_tms_cs_out(struct mpsse_ctx *ctx, const uint8_t *out, unsigned out_offset,
unsigned length, bool tdi, uint8_t mode)
{
- return mpsse_clock_tms_cs(ctx, out, out_offset, 0, 0, length, tdi, mode);
+ mpsse_clock_tms_cs(ctx, out, out_offset, 0, 0, length, tdi, mode);
}
-int mpsse_clock_tms_cs(struct mpsse_ctx *ctx, const uint8_t *out, unsigned out_offset, uint8_t *in,
+void mpsse_clock_tms_cs(struct mpsse_ctx *ctx, const uint8_t *out, unsigned out_offset, uint8_t *in,
unsigned in_offset, unsigned length, bool tdi, uint8_t mode)
{
DEBUG_IO("%sout %d bits, tdi=%d", in ? "in" : "", length, tdi);
assert(out);
- int retval = ERROR_OK;
+
+ if (ctx->retval != ERROR_OK) {
+ DEBUG_IO("Ignoring command due to previous error");
+ return;
+ }
mode |= 0x42;
if (in)
@@ -517,7 +585,7 @@ int mpsse_clock_tms_cs(struct mpsse_ctx *ctx, const uint8_t *out, unsigned out_o
while (length > 0) {
/* Guarantee buffer space enough for a minimum size transfer */
if (buffer_write_space(ctx) < 3 || (in && buffer_read_space(ctx) < 1))
- retval = mpsse_flush(ctx);
+ ctx->retval = mpsse_flush(ctx);
/* Byte transfer */
unsigned this_bits = length;
@@ -548,99 +616,109 @@ int mpsse_clock_tms_cs(struct mpsse_ctx *ctx, const uint8_t *out, unsigned out_o
length -= this_bits;
}
}
- return retval;
}
-int mpsse_set_data_bits_low_byte(struct mpsse_ctx *ctx, uint8_t data, uint8_t dir)
+void mpsse_set_data_bits_low_byte(struct mpsse_ctx *ctx, uint8_t data, uint8_t dir)
{
DEBUG_IO("-");
- int retval = ERROR_OK;
+
+ if (ctx->retval != ERROR_OK) {
+ DEBUG_IO("Ignoring command due to previous error");
+ return;
+ }
if (buffer_write_space(ctx) < 3)
- retval = mpsse_flush(ctx);
+ ctx->retval = mpsse_flush(ctx);
buffer_write_byte(ctx, 0x80);
buffer_write_byte(ctx, data);
buffer_write_byte(ctx, dir);
-
- return retval;
}
-int mpsse_set_data_bits_high_byte(struct mpsse_ctx *ctx, uint8_t data, uint8_t dir)
+void mpsse_set_data_bits_high_byte(struct mpsse_ctx *ctx, uint8_t data, uint8_t dir)
{
DEBUG_IO("-");
- int retval = ERROR_OK;
+
+ if (ctx->retval != ERROR_OK) {
+ DEBUG_IO("Ignoring command due to previous error");
+ return;
+ }
if (buffer_write_space(ctx) < 3)
- retval = mpsse_flush(ctx);
+ ctx->retval = mpsse_flush(ctx);
buffer_write_byte(ctx, 0x82);
buffer_write_byte(ctx, data);
buffer_write_byte(ctx, dir);
-
- return retval;
}
-int mpsse_read_data_bits_low_byte(struct mpsse_ctx *ctx, uint8_t *data)
+void mpsse_read_data_bits_low_byte(struct mpsse_ctx *ctx, uint8_t *data)
{
DEBUG_IO("-");
- int retval = ERROR_OK;
- if (buffer_write_space(ctx) < 1)
- retval = mpsse_flush(ctx);
+ if (ctx->retval != ERROR_OK) {
+ DEBUG_IO("Ignoring command due to previous error");
+ return;
+ }
+
+ if (buffer_write_space(ctx) < 1 || buffer_read_space(ctx) < 1)
+ ctx->retval = mpsse_flush(ctx);
buffer_write_byte(ctx, 0x81);
buffer_add_read(ctx, data, 0, 8, 0);
-
- return retval;
}
-int mpsse_read_data_bits_high_byte(struct mpsse_ctx *ctx, uint8_t *data)
+void mpsse_read_data_bits_high_byte(struct mpsse_ctx *ctx, uint8_t *data)
{
DEBUG_IO("-");
- int retval = ERROR_OK;
- if (buffer_write_space(ctx) < 1)
- retval = mpsse_flush(ctx);
+ if (ctx->retval != ERROR_OK) {
+ DEBUG_IO("Ignoring command due to previous error");
+ return;
+ }
+
+ if (buffer_write_space(ctx) < 1 || buffer_read_space(ctx) < 1)
+ ctx->retval = mpsse_flush(ctx);
buffer_write_byte(ctx, 0x83);
buffer_add_read(ctx, data, 0, 8, 0);
-
- return retval;
}
-static int single_byte_boolean_helper(struct mpsse_ctx *ctx, bool var, uint8_t val_if_true,
+static void single_byte_boolean_helper(struct mpsse_ctx *ctx, bool var, uint8_t val_if_true,
uint8_t val_if_false)
{
- int retval = ERROR_OK;
+ if (ctx->retval != ERROR_OK) {
+ DEBUG_IO("Ignoring command due to previous error");
+ return;
+ }
if (buffer_write_space(ctx) < 1)
- retval = mpsse_flush(ctx);
+ ctx->retval = mpsse_flush(ctx);
buffer_write_byte(ctx, var ? val_if_true : val_if_false);
-
- return retval;
}
-int mpsse_loopback_config(struct mpsse_ctx *ctx, bool enable)
+void mpsse_loopback_config(struct mpsse_ctx *ctx, bool enable)
{
LOG_DEBUG("%s", enable ? "on" : "off");
- return single_byte_boolean_helper(ctx, enable, 0x84, 0x85);
+ single_byte_boolean_helper(ctx, enable, 0x84, 0x85);
}
-int mpsse_set_divisor(struct mpsse_ctx *ctx, uint16_t divisor)
+void mpsse_set_divisor(struct mpsse_ctx *ctx, uint16_t divisor)
{
LOG_DEBUG("%d", divisor);
- int retval = ERROR_OK;
+
+ if (ctx->retval != ERROR_OK) {
+ DEBUG_IO("Ignoring command due to previous error");
+ return;
+ }
if (buffer_write_space(ctx) < 3)
- retval = mpsse_flush(ctx);
+ ctx->retval = mpsse_flush(ctx);
buffer_write_byte(ctx, 0x86);
buffer_write_byte(ctx, divisor & 0xff);
buffer_write_byte(ctx, divisor >> 8);
-
- return retval;
}
int mpsse_divide_by_5_config(struct mpsse_ctx *ctx, bool enable)
@@ -649,8 +727,9 @@ int mpsse_divide_by_5_config(struct mpsse_ctx *ctx, bool enable)
return ERROR_FAIL;
LOG_DEBUG("%s", enable ? "on" : "off");
+ single_byte_boolean_helper(ctx, enable, 0x8b, 0x8a);
- return single_byte_boolean_helper(ctx, enable, 0x8b, 0x8a);
+ return ERROR_OK;
}
int mpsse_rtck_config(struct mpsse_ctx *ctx, bool enable)
@@ -659,8 +738,9 @@ int mpsse_rtck_config(struct mpsse_ctx *ctx, bool enable)
return ERROR_FAIL;
LOG_DEBUG("%s", enable ? "on" : "off");
+ single_byte_boolean_helper(ctx, enable, 0x96, 0x97);
- return single_byte_boolean_helper(ctx, enable, 0x96, 0x97);
+ return ERROR_OK;
}
int mpsse_set_frequency(struct mpsse_ctx *ctx, int frequency)
@@ -674,10 +754,7 @@ int mpsse_set_frequency(struct mpsse_ctx *ctx, int frequency)
mpsse_rtck_config(ctx, false); /* just try */
- if (frequency > 60000000 / 2 / 65536 && mpsse_is_high_speed(ctx)) {
- int retval = mpsse_divide_by_5_config(ctx, false);
- if (retval != ERROR_OK)
- return retval;
+ if (frequency > 60000000 / 2 / 65536 && mpsse_divide_by_5_config(ctx, false) == ERROR_OK) {
base_clock = 60000000;
} else {
mpsse_divide_by_5_config(ctx, true); /* just try */
@@ -689,9 +766,7 @@ int mpsse_set_frequency(struct mpsse_ctx *ctx, int frequency)
divisor = 65535;
assert(divisor >= 0);
- int retval = mpsse_set_divisor(ctx, divisor);
- if (retval != ERROR_OK)
- return retval;
+ mpsse_set_divisor(ctx, divisor);
frequency = base_clock / 2 / (1 + divisor);
LOG_DEBUG("actually %d Hz", frequency);
@@ -708,7 +783,7 @@ struct transfer_result {
static LIBUSB_CALL void read_cb(struct libusb_transfer *transfer)
{
- struct transfer_result *res = (struct transfer_result *)transfer->user_data;
+ struct transfer_result *res = transfer->user_data;
struct mpsse_ctx *ctx = res->ctx;
unsigned packet_size = ctx->max_packet_size;
@@ -746,7 +821,7 @@ static LIBUSB_CALL void read_cb(struct libusb_transfer *transfer)
static LIBUSB_CALL void write_cb(struct libusb_transfer *transfer)
{
- struct transfer_result *res = (struct transfer_result *)transfer->user_data;
+ struct transfer_result *res = transfer->user_data;
struct mpsse_ctx *ctx = res->ctx;
res->transferred += transfer->actual_length;
@@ -767,10 +842,18 @@ static LIBUSB_CALL void write_cb(struct libusb_transfer *transfer)
int mpsse_flush(struct mpsse_ctx *ctx)
{
+ int retval = ctx->retval;
+
+ if (retval != ERROR_OK) {
+ DEBUG_IO("Ignoring flush due to previous error");
+ assert(ctx->write_count == 0 && ctx->read_count == 0);
+ ctx->retval = ERROR_OK;
+ return retval;
+ }
+
DEBUG_IO("write %d%s, read %d", ctx->write_count, ctx->read_count ? "+1" : "",
ctx->read_count);
assert(ctx->write_count > 0 || ctx->read_count == 0); /* No read data without write data */
- int retval = ERROR_OK;
if (ctx->write_count == 0)
return retval;
@@ -813,7 +896,7 @@ int mpsse_flush(struct mpsse_ctx *ctx)
}
if (retval != LIBUSB_SUCCESS) {
- LOG_ERROR("libusb_handle_events() failed with %d", retval);
+ LOG_ERROR("libusb_handle_events() failed with %s", libusb_error_name(retval));
retval = ERROR_FAIL;
} else if (write_result.transferred < ctx->write_count) {
LOG_ERROR("ftdi device did not accept all data: %d, tried %d",