static int stlink_usb_halt(void *handle)
{
int res;
struct stlink_usb_handle_s *h = handle;
assert(handle != NULL);
if (h->jtag_api == STLINK_JTAG_API_V2) {
res = stlink_usb_write_debug_reg(handle, DCB_DHCSR, DBGKEY|C_HALT|C_DEBUGEN);
if (res == ERROR_OK && h->trace.enabled)
stlink_usb_trace_disable(handle);
return res;
}
stlink_usb_init_buffer(handle, h->rx_ep, 2);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_FORCEDEBUG;
res = stlink_usb_xfer(handle, h->databuf, 2);
if (res != ERROR_OK)
return res;
return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL;
}
static int stlink_usb_run(void *handle)
{
int res;
struct stlink_usb_handle_s *h = handle;
assert(handle != NULL);
if (h->jtag_api == STLINK_JTAG_API_V2) {
res = stlink_usb_write_debug_reg(handle, DCB_DHCSR, DBGKEY|C_DEBUGEN);
/* Try to start tracing, if requested */
if (res == ERROR_OK && h->trace.source_hz && !h->trace.enabled) {
if (stlink_usb_trace_enable(handle) == ERROR_OK)
LOG_DEBUG("Tracing: enabled\n");
else
LOG_ERROR("Tracing: enable failed\n");
}
return res;
}
stlink_usb_init_buffer(handle, h->rx_ep, 2);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_RUNCORE;
res = stlink_usb_xfer(handle, h->databuf, 2);
if (res != ERROR_OK)
return res;
return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL;
}
static int stlink_usb_read_mem8(void *handle, uint32_t addr, uint16_t len,
uint8_t *buffer)
{
int res;
uint16_t read_len = len;
struct stlink_usb_handle_s *h;
assert(handle != NULL);
h = (struct stlink_usb_handle_s *)handle;
stlink_usb_init_buffer(handle, STLINK_RX_EP, read_len);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_READMEM_8BIT;
h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
h->cmdidx += 4;
h_u16_to_le(h->cmdbuf+h->cmdidx, len);
h->cmdidx += 2;
/* we need to fix read length for single bytes */
if (read_len == 1)
read_len++;
res = stlink_usb_xfer(handle, h->databuf, read_len);
if (res != ERROR_OK)
return res;
memcpy(buffer, h->databuf, len);
return stlink_usb_get_rw_status(handle);
}
static int stlink_usb_write_reg(void *handle, int num, uint32_t val)
{
int res;
struct stlink_usb_handle_s *h;
assert(handle != NULL);
h = (struct stlink_usb_handle_s *)handle;
stlink_usb_init_buffer(handle, STLINK_RX_EP, 2);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
if (h->jtag_api == STLINK_JTAG_API_V1)
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_WRITEREG;
else
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_WRITEREG;
h->cmdbuf[h->cmdidx++] = num;
h_u32_to_le(h->cmdbuf+h->cmdidx, val);
h->cmdidx += 4;
res = stlink_usb_xfer(handle, h->databuf, 2);
if (res != ERROR_OK)
return res;
return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL;
}
static int stlink_usb_write_mem32(void *handle, uint32_t addr, uint16_t len,
const uint8_t *buffer)
{
int res;
struct stlink_usb_handle_s *h = handle;
assert(handle != NULL);
/* data must be a multiple of 4 and word aligned */
if (len % 4 || addr % 4) {
LOG_DEBUG("Invalid data alignment");
return ERROR_TARGET_UNALIGNED_ACCESS;
}
stlink_usb_init_buffer(handle, h->tx_ep, len);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_WRITEMEM_32BIT;
h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
h->cmdidx += 4;
h_u16_to_le(h->cmdbuf+h->cmdidx, len);
h->cmdidx += 2;
res = stlink_usb_xfer(handle, buffer, len);
if (res != ERROR_OK)
return res;
return stlink_usb_get_rw_status(handle);
}
static int stlink_usb_write_mem8(void *handle, uint32_t addr, uint16_t len,
const uint8_t *buffer)
{
int res;
struct stlink_usb_handle_s *h = handle;
assert(handle != NULL);
/* max 8bit read/write is 64bytes */
if (len > STLINK_MAX_RW8) {
LOG_DEBUG("max buffer length exceeded");
return ERROR_FAIL;
}
stlink_usb_init_buffer(handle, h->tx_ep, len);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_WRITEMEM_8BIT;
h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
h->cmdidx += 4;
h_u16_to_le(h->cmdbuf+h->cmdidx, len);
h->cmdidx += 2;
res = stlink_usb_xfer(handle, buffer, len);
if (res != ERROR_OK)
return res;
return stlink_usb_get_rw_status(handle);
}
static int stlink_usb_check_voltage(void *handle, float *target_voltage)
{
struct stlink_usb_handle_s *h = handle;
uint32_t adc_results[2];
/* only supported by stlink/v2 and for firmware >= 13 */
if (h->version.stlink == 1 || h->version.jtag < 13)
return ERROR_COMMAND_NOTFOUND;
stlink_usb_init_buffer(handle, h->rx_ep, 8);
h->cmdbuf[h->cmdidx++] = STLINK_GET_TARGET_VOLTAGE;
int result = stlink_usb_xfer(handle, h->databuf, 8);
if (result != ERROR_OK)
return result;
/* convert result */
adc_results[0] = le_to_h_u32(h->databuf);
adc_results[1] = le_to_h_u32(h->databuf + 4);
*target_voltage = 0;
if (adc_results[0])
*target_voltage = 2 * ((float)adc_results[1]) * (float)(1.2 / adc_results[0]);
LOG_INFO("Target voltage: %f", (double)*target_voltage);
return ERROR_OK;
}
static int stlink_usb_read_reg(void *handle, int num, uint32_t *val)
{
int res;
struct stlink_usb_handle_s *h;
assert(handle != NULL);
h = (struct stlink_usb_handle_s *)handle;
stlink_usb_init_buffer(handle, STLINK_RX_EP, h->jtag_api == STLINK_JTAG_API_V1 ? 4 : 8);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
if (h->jtag_api == STLINK_JTAG_API_V1)
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_READREG;
else
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_READREG;
h->cmdbuf[h->cmdidx++] = num;
res = stlink_usb_xfer(handle, h->databuf, h->jtag_api == STLINK_JTAG_API_V1 ? 4 : 8);
if (res != ERROR_OK)
return res;
if (h->jtag_api == STLINK_JTAG_API_V1)
*val = le_to_h_u32(h->databuf);
else {
*val = le_to_h_u32(h->databuf + 4);
return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL;
}
return ERROR_OK;
}
static int stlink_usb_reset(void *handle)
{
int res;
struct stlink_usb_handle_s *h;
assert(handle != NULL);
h = (struct stlink_usb_handle_s *)handle;
stlink_usb_init_buffer(handle, STLINK_RX_EP, 2);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
if (h->jtag_api == STLINK_JTAG_API_V1)
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_RESETSYS;
else
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_RESETSYS;
res = stlink_usb_xfer(handle, h->databuf, 2);
if (res != ERROR_OK)
return res;
LOG_DEBUG("RESET: 0x%08X", h->databuf[0]);
/* the following is not a error under swd (using hardware srst), so return success */
if (h->databuf[0] == STLINK_SWD_AP_WAIT || h->databuf[0] == STLINK_SWD_DP_WAIT)
return ERROR_OK;
return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL;
}
static int stlink_usb_xfer_v1_get_sense(void *handle)
{
int res;
struct stlink_usb_handle_s *h;
assert(handle != NULL);
h = (struct stlink_usb_handle_s *)handle;
stlink_usb_init_buffer(handle, STLINK_RX_EP, 16);
h->cmdbuf[h->cmdidx++] = REQUEST_SENSE;
h->cmdbuf[h->cmdidx++] = 0;
h->cmdbuf[h->cmdidx++] = 0;
h->cmdbuf[h->cmdidx++] = 0;
h->cmdbuf[h->cmdidx++] = REQUEST_SENSE_LENGTH;
res = stlink_usb_xfer_rw(handle, REQUEST_SENSE_LENGTH, h->databuf, 16);
if (res != ERROR_OK)
return res;
if (stlink_usb_xfer_v1_get_status(handle) != ERROR_OK)
return ERROR_FAIL;
return ERROR_OK;
}
static enum target_state stlink_usb_state(void *handle)
{
int res;
struct stlink_usb_handle_s *h;
assert(handle != NULL);
h = (struct stlink_usb_handle_s *)handle;
if (h->jtag_api == STLINK_JTAG_API_V2)
return stlink_usb_v2_get_status(handle);
stlink_usb_init_buffer(handle, STLINK_RX_EP, 2);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_GETSTATUS;
res = stlink_usb_xfer(handle, h->databuf, 2);
if (res != ERROR_OK)
return TARGET_UNKNOWN;
if (h->databuf[0] == STLINK_CORE_RUNNING)
return TARGET_RUNNING;
if (h->databuf[0] == STLINK_CORE_HALTED)
return TARGET_HALTED;
return TARGET_UNKNOWN;
}
static int stlink_usb_idcode(void *handle, uint32_t *idcode)
{
int res;
struct stlink_usb_handle_s *h;
assert(handle != NULL);
h = (struct stlink_usb_handle_s *)handle;
stlink_usb_init_buffer(handle, STLINK_RX_EP, 4);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_READCOREID;
res = stlink_usb_xfer(handle, h->databuf, 4);
if (res != ERROR_OK)
return res;
*idcode = le_to_h_u32(h->databuf);
LOG_DEBUG("IDCODE: 0x%08X", *idcode);
return ERROR_OK;
}
static int stlink_usb_v2_read_debug_reg(void *handle, uint32_t addr, uint32_t *val)
{
struct stlink_usb_handle_s *h;
int res;
assert(handle != NULL);
h = (struct stlink_usb_handle_s *)handle;
stlink_usb_init_buffer(handle, STLINK_RX_EP, 8);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_READDEBUGREG;
h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
h->cmdidx += 4;
res = stlink_usb_xfer(handle, h->databuf, 8);
if (res != ERROR_OK)
return res;
*val = le_to_h_u32(h->databuf + 4);
return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL;
}
static int stlink_usb_write_mem32(void *handle, uint32_t addr, uint16_t len,
const uint8_t *buffer)
{
int res;
struct stlink_usb_handle_s *h;
assert(handle != NULL);
h = (struct stlink_usb_handle_s *)handle;
len *= 4;
stlink_usb_init_buffer(handle, STLINK_TX_EP, len);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_WRITEMEM_32BIT;
h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
h->cmdidx += 4;
h_u16_to_le(h->cmdbuf+h->cmdidx, len);
h->cmdidx += 2;
res = stlink_usb_xfer(handle, buffer, len);
if (res != ERROR_OK)
return res;
return stlink_usb_get_rw_status(handle);
}
static int stlink_usb_step(void *handle)
{
int res;
struct stlink_usb_handle_s *h;
assert(handle != NULL);
h = (struct stlink_usb_handle_s *)handle;
if (h->jtag_api == STLINK_JTAG_API_V2) {
/* TODO: this emulates the v1 api, it should really use a similar auto mask isr
* that the cortex-m3 currently does. */
stlink_usb_write_debug_reg(handle, DCB_DHCSR, DBGKEY|C_HALT|C_MASKINTS|C_DEBUGEN);
stlink_usb_write_debug_reg(handle, DCB_DHCSR, DBGKEY|C_STEP|C_MASKINTS|C_DEBUGEN);
return stlink_usb_write_debug_reg(handle, DCB_DHCSR, DBGKEY|C_HALT|C_DEBUGEN);
}
stlink_usb_init_buffer(handle, STLINK_RX_EP, 2);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_STEPCORE;
res = stlink_usb_xfer(handle, h->databuf, 2);
if (res != ERROR_OK)
return res;
return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL;
}
static int stlink_usb_assert_srst(void *handle, int srst)
{
int res;
struct stlink_usb_handle_s *h;
assert(handle != NULL);
h = (struct stlink_usb_handle_s *)handle;
if (h->jtag_api == STLINK_JTAG_API_V1)
return ERROR_COMMAND_NOTFOUND;
stlink_usb_init_buffer(handle, STLINK_RX_EP, 2);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_DRIVE_NRST;
h->cmdbuf[h->cmdidx++] = srst;
res = stlink_usb_xfer(handle, h->databuf, 2);
if (res != ERROR_OK)
return res;
return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL;
}
static void stlink_usb_trace_read(void *handle)
{
struct stlink_usb_handle_s *h = handle;
assert(handle != NULL);
if (h->trace.enabled && h->version.jtag >= STLINK_TRACE_MIN_VERSION) {
int res;
stlink_usb_init_buffer(handle, h->rx_ep, 10);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_GET_TRACE_NB;
res = stlink_usb_xfer(handle, h->databuf, 2);
if (res == ERROR_OK) {
uint8_t buf[STLINK_TRACE_SIZE];
size_t size = le_to_h_u16(h->databuf);
if (size > 0) {
size = size < sizeof(buf) ? size : sizeof(buf) - 1;
res = stlink_usb_read_trace(handle, buf, size);
if (res == ERROR_OK) {
if (h->trace.output_f) {
/* Log retrieved trace output */
if (fwrite(buf, 1, size, h->trace.output_f) > 0)
fflush(h->trace.output_f);
}
}
}
}
}
}
static int stlink_usb_mode_leave(void *handle, enum stlink_mode type)
{
int res;
struct stlink_usb_handle_s *h = handle;
assert(handle != NULL);
stlink_usb_init_buffer(handle, STLINK_NULL_EP, 0);
switch (type) {
case STLINK_MODE_DEBUG_JTAG:
case STLINK_MODE_DEBUG_SWD:
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_EXIT;
break;
case STLINK_MODE_DEBUG_SWIM:
h->cmdbuf[h->cmdidx++] = STLINK_SWIM_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_SWIM_EXIT;
break;
case STLINK_MODE_DFU:
h->cmdbuf[h->cmdidx++] = STLINK_DFU_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DFU_EXIT;
break;
case STLINK_MODE_MASS:
default:
return ERROR_FAIL;
}
res = stlink_usb_xfer(handle, 0, 0);
if (res != ERROR_OK)
return res;
return ERROR_OK;
}
static int stlink_usb_mode_enter(void *handle, enum stlink_mode type)
{
int res;
int rx_size = 0;
struct stlink_usb_handle_s *h;
assert(handle != NULL);
h = (struct stlink_usb_handle_s *)handle;
/* on api V2 we are able the read the latest command
* status
* TODO: we need the test on api V1 too
*/
if (h->jtag_api == STLINK_JTAG_API_V2)
rx_size = 2;
stlink_usb_init_buffer(handle, STLINK_RX_EP, rx_size);
switch (type) {
case STLINK_MODE_DEBUG_JTAG:
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
if (h->jtag_api == STLINK_JTAG_API_V1)
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_ENTER;
else
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_ENTER;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_ENTER_JTAG;
break;
case STLINK_MODE_DEBUG_SWD:
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
if (h->jtag_api == STLINK_JTAG_API_V1)
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_ENTER;
else
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_ENTER;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_ENTER_SWD;
break;
case STLINK_MODE_DEBUG_SWIM:
h->cmdbuf[h->cmdidx++] = STLINK_SWIM_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_SWIM_ENTER;
break;
case STLINK_MODE_DFU:
case STLINK_MODE_MASS:
default:
return ERROR_FAIL;
}
res = stlink_usb_xfer(handle, h->databuf, rx_size);
if (res != ERROR_OK)
return res;
res = stlink_usb_error_check(h);
return res;
}
static int stlink_usb_trace_enable(void *handle)
{
int res;
struct stlink_usb_handle_s *h = handle;
assert(handle != NULL);
if (h->version.jtag >= STLINK_TRACE_MIN_VERSION) {
uint32_t trace_hz;
res = stlink_configure_target_trace_port(handle);
if (res != ERROR_OK)
LOG_ERROR("Unable to configure tracing on target\n");
trace_hz = h->trace.prescale > 0 ?
h->trace.source_hz / (h->trace.prescale + 1) :
h->trace.source_hz;
stlink_usb_init_buffer(handle, h->rx_ep, 10);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_START_TRACE_RX;
h_u16_to_le(h->cmdbuf+h->cmdidx, (uint16_t)STLINK_TRACE_SIZE);
h->cmdidx += 2;
h_u32_to_le(h->cmdbuf+h->cmdidx, trace_hz);
h->cmdidx += 4;
res = stlink_usb_xfer(handle, h->databuf, 2);
if (res == ERROR_OK) {
h->trace.enabled = true;
LOG_DEBUG("Tracing: recording at %" PRIu32 "Hz\n", trace_hz);
/* We need the trace read function to be called at a
* high-enough frequency to ensure reasonable
* "timeliness" in processing ITM/DWT data.
* TODO: An alternative could be using the asynchronous
* features of the libusb-1.0 API to queue up one or more
* reads in advance and requeue them once they are
* completed. */
target_register_timer_callback(stlink_usb_trace_read_callback, 1, 1, handle);
}
} else {
LOG_ERROR("Tracing is not supported by this version.");
res = ERROR_FAIL;
}
return res;
}
static int stlink_usb_version(void *handle)
{
int res;
uint16_t v;
struct stlink_usb_handle_s *h;
assert(handle != NULL);
h = (struct stlink_usb_handle_s *)handle;
stlink_usb_init_buffer(handle, STLINK_RX_EP, 6);
h->cmdbuf[h->cmdidx++] = STLINK_GET_VERSION;
res = stlink_usb_xfer(handle, h->databuf, 6);
if (res != ERROR_OK)
return res;
v = (h->databuf[0] << 8) | h->databuf[1];
h->version.stlink = (v >> 12) & 0x0f;
h->version.jtag = (v >> 6) & 0x3f;
h->version.swim = v & 0x3f;
h->vid = buf_get_u32(h->databuf, 16, 16);
h->pid = buf_get_u32(h->databuf, 32, 16);
/* set the supported jtag api version
* API V2 is supported since JTAG V11
*/
if (h->version.jtag >= 11)
h->version.jtag_api_max = STLINK_JTAG_API_V2;
else
h->version.jtag_api_max = STLINK_JTAG_API_V1;
LOG_DEBUG("STLINK v%d JTAG v%d API v%d SWIM v%d VID 0x%04X PID 0x%04X",
h->version.stlink,
h->version.jtag,
(h->version.jtag_api_max == STLINK_JTAG_API_V1) ? 1 : 2,
h->version.swim,
h->vid,
h->pid);
return ERROR_OK;
}
static enum target_state stlink_usb_state(void *handle)
{
int res;
struct stlink_usb_handle_s *h = handle;
assert(handle != NULL);
if (h->reconnect_pending) {
LOG_INFO("Previous state query failed, trying to reconnect");
res = stlink_usb_mode_enter(handle, stlink_get_mode(h->transport));
if (res != ERROR_OK)
return TARGET_UNKNOWN;
h->reconnect_pending = false;
}
if (h->jtag_api == STLINK_JTAG_API_V2) {
res = stlink_usb_v2_get_status(handle);
if (res == TARGET_UNKNOWN)
h->reconnect_pending = true;
return res;
}
stlink_usb_init_buffer(handle, h->rx_ep, 2);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_GETSTATUS;
res = stlink_usb_xfer(handle, h->databuf, 2);
if (res != ERROR_OK)
return TARGET_UNKNOWN;
if (h->databuf[0] == STLINK_CORE_RUNNING)
return TARGET_RUNNING;
if (h->databuf[0] == STLINK_CORE_HALTED)
return TARGET_HALTED;
h->reconnect_pending = true;
return TARGET_UNKNOWN;
}
static int stlink_usb_current_mode(void *handle, uint8_t *mode)
{
int res;
struct stlink_usb_handle_s *h = handle;
assert(handle != NULL);
stlink_usb_init_buffer(handle, h->rx_ep, 2);
h->cmdbuf[h->cmdidx++] = STLINK_GET_CURRENT_MODE;
res = stlink_usb_xfer(handle, h->databuf, 2);
if (res != ERROR_OK)
return res;
*mode = h->databuf[0];
return ERROR_OK;
}
static void stlink_usb_trace_disable(void *handle)
{
int res = ERROR_OK;
struct stlink_usb_handle_s *h = handle;
assert(handle != NULL);
assert(h->version.jtag >= STLINK_TRACE_MIN_VERSION);
LOG_DEBUG("Tracing: disable\n");
stlink_usb_init_buffer(handle, h->rx_ep, 2);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_STOP_TRACE_RX;
res = stlink_usb_xfer(handle, h->databuf, 2);
if (res == ERROR_OK) {
h->trace.enabled = false;
target_unregister_timer_callback(stlink_usb_trace_read_callback, handle);
}
}
static int stlink_usb_read_regs(void *handle)
{
int res;
struct stlink_usb_handle_s *h = handle;
assert(handle != NULL);
stlink_usb_init_buffer(handle, h->rx_ep, 84);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
if (h->jtag_api == STLINK_JTAG_API_V1)
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_READALLREGS;
else
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_READALLREGS;
res = stlink_usb_xfer(handle, h->databuf, 84);
if (res != ERROR_OK)
return res;
return ERROR_OK;
}
static int stlink_usb_get_rw_status(void *handle)
{
int res;
struct stlink_usb_handle_s *h = handle;
assert(handle != NULL);
if (h->jtag_api == STLINK_JTAG_API_V1)
return ERROR_OK;
stlink_usb_init_buffer(handle, h->rx_ep, 2);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_GETLASTRWSTATUS;
res = stlink_usb_xfer(handle, h->databuf, 2);
if (res != ERROR_OK)
return res;
return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : res;
}
static int stlink_usb_read_mem8(void *handle, uint32_t addr, uint16_t len,
uint8_t *buffer)
{
int res;
uint16_t read_len = len;
struct stlink_usb_handle_s *h = handle;
assert(handle != NULL);
/* max 8bit read/write is 64bytes */
if (len > STLINK_MAX_RW8) {
LOG_DEBUG("max buffer length exceeded");
return ERROR_FAIL;
}
stlink_usb_init_buffer(handle, h->rx_ep, read_len);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_READMEM_8BIT;
h_u32_to_le(h->cmdbuf+h->cmdidx, addr);
h->cmdidx += 4;
h_u16_to_le(h->cmdbuf+h->cmdidx, len);
h->cmdidx += 2;
/* we need to fix read length for single bytes */
if (read_len == 1)
read_len++;
res = stlink_usb_xfer(handle, h->databuf, read_len);
if (res != ERROR_OK)
return res;
memcpy(buffer, h->databuf, len);
return stlink_usb_get_rw_status(handle);
}
static int stlink_usb_halt(void *handle)
{
int res;
struct stlink_usb_handle_s *h;
assert(handle != NULL);
h = (struct stlink_usb_handle_s *)handle;
if (h->jtag_api == STLINK_JTAG_API_V2)
return stlink_usb_write_debug_reg(handle, DCB_DHCSR, DBGKEY|C_HALT|C_DEBUGEN);
stlink_usb_init_buffer(handle, STLINK_RX_EP, 2);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_FORCEDEBUG;
res = stlink_usb_xfer(handle, h->databuf, 2);
if (res != ERROR_OK)
return res;
return h->databuf[0] == STLINK_DEBUG_ERR_OK ? ERROR_OK : ERROR_FAIL;
}
