static int jlink_speed(int speed)
{
int ret;
uint32_t freq;
uint16_t divider;
int max_speed;
if (jaylink_has_cap(caps, JAYLINK_DEV_CAP_GET_SPEEDS)) {
ret = jaylink_get_speeds(devh, &freq, ÷r);
if (ret != JAYLINK_OK) {
LOG_ERROR("jaylink_get_speeds() failed: %s.",
jaylink_strerror_name(ret));
return ERROR_JTAG_DEVICE_ERROR;
}
freq = freq / 1000;
max_speed = freq / divider;
} else {
max_speed = JLINK_MAX_SPEED;
}
if (!speed) {
if (!jaylink_has_cap(caps, JAYLINK_DEV_CAP_ADAPTIVE_CLOCKING)) {
LOG_ERROR("Adaptive clocking is not supported by the device.");
return ERROR_JTAG_NOT_IMPLEMENTED;
}
speed = JAYLINK_SPEED_ADAPTIVE_CLOCKING;
} else if (speed > max_speed) {
LOG_INFO("Reduced speed from %d kHz to %d kHz (maximum).", speed,
max_speed);
speed = max_speed;
}
ret = jaylink_set_speed(devh, speed);
if (ret != JAYLINK_OK) {
LOG_ERROR("jaylink_set_speed() failed: %s.",
jaylink_strerror_name(ret));
return ERROR_JTAG_DEVICE_ERROR;
}
return ERROR_OK;
}
int jlink_spi_init(void)
{
char *arg;
unsigned long speed = 0;
register_shutdown(jlink_spi_shutdown, NULL);
arg = extract_programmer_param("spispeed");
if (arg) {
char *endptr;
errno = 0;
speed = strtoul(arg, &endptr, 10);
if (*endptr != '\0' || errno != 0) {
msg_perr("Invalid SPI speed specified: %s.\n", arg);
free(arg);
return 1;
}
if (speed < 1) {
msg_perr("SPI speed must be at least 1 kHz.\n");
free(arg);
return 1;
}
}
free(arg);
int ret;
bool use_serial_number;
uint32_t serial_number;
arg = extract_programmer_param("serial");
if (arg) {
if (!strlen(arg)) {
msg_perr("Emptpy serial number specified.\n");
free(arg);
return 1;
}
ret = jaylink_parse_serial_number(arg, &serial_number);
if (ret == JAYLINK_ERR) {
msg_perr("Invalid serial number specified: %s.\n", arg);
free(arg);
return 1;
} if (ret != JAYLINK_OK) {
msg_perr("jaylink_parse_serial_number() failed: %s.\n", jaylink_strerror(ret));
free(arg);
return 1;
}
use_serial_number = true;
} else {
use_serial_number = false;
}
free(arg);
reset_cs = true;
arg = extract_programmer_param("cs");
if (arg) {
if (!strcasecmp(arg, "reset")) {
reset_cs = true;
} else if (!strcasecmp(arg, "trst")) {
reset_cs = false;
} else {
msg_perr("Invalid chip select pin specified: '%s'.\n", arg);
free(arg);
return 1;
}
}
free(arg);
if (reset_cs)
msg_pdbg("Using RESET as chip select signal.\n");
else
msg_pdbg("Using TRST as chip select signal.\n");
ret = jaylink_init(&jaylink_ctx);
if (ret != JAYLINK_OK) {
msg_perr("jaylink_init() failed: %s.\n", jaylink_strerror(ret));
return 1;
}
ret = jaylink_discovery_scan(jaylink_ctx, 0);
if (ret != JAYLINK_OK) {
msg_perr("jaylink_discover_scan() failed: %s.\n", jaylink_strerror(ret));
return 1;
}
struct jaylink_device **devs;
ret = jaylink_get_devices(jaylink_ctx, &devs, NULL);
if (ret != JAYLINK_OK) {
msg_perr("jaylink_get_devices() failed: %s.\n", jaylink_strerror(ret));
return 1;
}
if (!use_serial_number)
msg_pdbg("No device selected, using first device.\n");
size_t i;
struct jaylink_device *dev;
bool device_found = false;
for (i = 0; devs[i]; i++) {
if (use_serial_number) {
uint32_t tmp;
ret = jaylink_device_get_serial_number(devs[i], &tmp);
if (ret == JAYLINK_ERR_NOT_AVAILABLE) {
continue;
} else if (ret != JAYLINK_OK) {
msg_pwarn("jaylink_device_get_serial_number() failed: %s.\n",
jaylink_strerror(ret));
continue;
}
if (serial_number != tmp)
continue;
}
ret = jaylink_open(devs[i], &jaylink_devh);
if (ret == JAYLINK_OK) {
dev = devs[i];
device_found = true;
break;
}
jaylink_devh = NULL;
}
jaylink_free_devices(devs, true);
if (!device_found) {
msg_perr("No J-Link device found.\n");
return 1;
}
size_t length;
char *firmware_version;
ret = jaylink_get_firmware_version(jaylink_devh, &firmware_version,
&length);
if (ret != JAYLINK_OK) {
msg_perr("jaylink_get_firmware_version() failed: %s.\n", jaylink_strerror(ret));
return 1;
} else if (length > 0) {
msg_pdbg("Firmware: %s\n", firmware_version);
free(firmware_version);
}
ret = jaylink_device_get_serial_number(dev, &serial_number);
if (ret == JAYLINK_OK) {
msg_pdbg("S/N: %" PRIu32 "\n", serial_number);
} else if (ret == JAYLINK_ERR_NOT_AVAILABLE) {
msg_pdbg("S/N: N/A\n");
} else {
msg_perr("jaylink_device_get_serial_number() failed: %s.\n", jaylink_strerror(ret));
return 1;
}
uint8_t caps[JAYLINK_DEV_EXT_CAPS_SIZE];
memset(caps, 0, sizeof(caps));
ret = jaylink_get_caps(jaylink_devh, caps);
if (ret != JAYLINK_OK) {
msg_perr("jaylink_get_caps() failed: %s.\n", jaylink_strerror(ret));
return 1;
}
if (jaylink_has_cap(caps, JAYLINK_DEV_CAP_GET_EXT_CAPS)) {
ret = jaylink_get_extended_caps(jaylink_devh, caps);
if (ret != JAYLINK_OK) {
msg_perr("jaylink_get_available_interfaces() failed: %s.\n", jaylink_strerror(ret));
return 1;
}
}
uint32_t ifaces;
ret = jaylink_get_available_interfaces(jaylink_devh, &ifaces);
if (ret != JAYLINK_OK) {
msg_perr("jaylink_get_available_interfaces() failed: %s.\n", jaylink_strerror(ret));
return 1;
}
if (!(ifaces & (1 << JAYLINK_TIF_JTAG))) {
msg_perr("Device does not support JTAG interface.\n");
return 1;
}
ret = jaylink_select_interface(jaylink_devh, JAYLINK_TIF_JTAG, NULL);
if (ret != JAYLINK_OK) {
msg_perr("jaylink_select_interface() failed: %s.\n", jaylink_strerror(ret));
return 1;
}
struct jaylink_hardware_status hwstat;
ret = jaylink_get_hardware_status(jaylink_devh, &hwstat);
if (ret != JAYLINK_OK) {
msg_perr("jaylink_get_hardware_status() failed: %s.\n", jaylink_strerror(ret));
return 1;
}
msg_pdbg("VTarget: %u.%03u V\n", hwstat.target_voltage / 1000,
hwstat.target_voltage % 1000);
if (hwstat.target_voltage < MIN_TARGET_VOLTAGE) {
msg_perr("Target voltage is below %u.%03u V. You need to attach VTref to the I/O voltage of "
"the chip.\n", MIN_TARGET_VOLTAGE / 1000, MIN_TARGET_VOLTAGE % 1000);
return 1;
}
struct jaylink_speed device_speeds;
device_speeds.freq = DEFAULT_FREQ;
device_speeds.div = DEFAULT_FREQ_DIV;
if (jaylink_has_cap(caps, JAYLINK_DEV_CAP_GET_SPEEDS)) {
ret = jaylink_get_speeds(jaylink_devh, &device_speeds);
if (ret != JAYLINK_OK) {
msg_perr("jaylink_get_speeds() failed: %s.\n", jaylink_strerror(ret));
return 1;
}
}
device_speeds.freq /= 1000;
msg_pdbg("Maximum SPI speed: %" PRIu32 " kHz\n", device_speeds.freq / device_speeds.div);
if (!speed) {
speed = device_speeds.freq / device_speeds.div;
msg_pdbg("SPI speed not specified, using %lu kHz.\n", speed);
}
if (speed > (device_speeds.freq / device_speeds.div)) {
msg_perr("Specified SPI speed of %lu kHz is too high. Maximum is %" PRIu32 " kHz.\n", speed,
device_speeds.freq / device_speeds.div);
return 1;
}
ret = jaylink_set_speed(jaylink_devh, speed);
if (ret != JAYLINK_OK) {
msg_perr("jaylink_set_speed() failed: %s.\n", jaylink_strerror(ret));
return 1;
}
msg_pdbg("SPI speed: %lu kHz\n", speed);
/* Ensure that the CS signal is not active initially. */
if (!deassert_cs())
return 1;
register_spi_master(&spi_master_jlink_spi);
return 0;
}