/* See Segger's public documentation:
* Reference manual for J-Link USB Protocol
* Document RM08001-R6 Date: June 16, 2009
+ * (Or newer, with some SWD information).
+
+http://www.segger.com/cms/admin/uploads/productDocs/RM08001_JLinkUSBProtocol.pdf
*/
-#define VID 0x1366
-#define PID 0x0101
+/*
+ * The default pid of the segger is 0x0101
+ * But when you change the USB Address it will also
+ *
+ * pid = ( usb_address > 0x4) ? 0x0101 : (0x101 + usb_address)
+ */
+#define VID 0x1366, 0x1366, 0x1366, 0x1366
+#define PID 0x0101, 0x0102, 0x0103, 0x0104
#define JLINK_WRITE_ENDPOINT 0x02
#define JLINK_READ_ENDPOINT 0x81
#define JLINK_USB_TIMEOUT 1000
-// See Section 1.3.2 of the Segger JLink USB protocol manual
+// See Section 3.3.2 of the Segger JLink USB protocol manual
/* 2048 is the max value we can use here */
-//#define JLINK_TAP_BUFFER_SIZE 2048
-#define JLINK_TAP_BUFFER_SIZE 256
+#define JLINK_TAP_BUFFER_SIZE 2048
+//#define JLINK_TAP_BUFFER_SIZE 256
//#define JLINK_TAP_BUFFER_SIZE 384
#define JLINK_IN_BUFFER_SIZE 2048
static uint8_t usb_emu_result_buffer[JLINK_EMU_RESULT_BUFFER_SIZE];
/* Constants for JLink command */
-#define EMU_CMD_VERSION 0x01
+#define EMU_CMD_VERSION 0x01
#define EMU_CMD_SET_SPEED 0x05
#define EMU_CMD_GET_STATE 0x07
-#define EMU_CMD_HW_CLOCK 0xc8
+#define EMU_CMD_HW_CLOCK 0xc8
#define EMU_CMD_HW_TMS0 0xc9
#define EMU_CMD_HW_TMS1 0xca
#define EMU_CMD_HW_JTAG2 0xce
#define EMU_CMD_GET_HW_VERSION 0xf0
/* bits return from EMU_CMD_GET_CAPS */
+#define EMU_CAP_RESERVED_1 0
#define EMU_CAP_GET_HW_VERSION 1
+#define EMU_CAP_WRITE_DCC 2
+#define EMU_CAP_ADAPTIVE_CLOCKING 3
+#define EMU_CAP_READ_CONFIG 4
+#define EMU_CAP_WRITE_CONFIG 5
+#define EMU_CAP_TRACE 6
+#define EMU_CAP_WRITE_MEM 7
+#define EMU_CAP_READ_MEM 8
+#define EMU_CAP_SPEED_INFO 9
+#define EMU_CAP_EXEC_CODE 10
#define EMU_CAP_GET_MAX_BLOCK_SIZE 11
+#define EMU_CAP_GET_HW_INFO 12
+#define EMU_CAP_SET_KS_POWER 13
+#define EMU_CAP_RESET_STOP_TIMED 14
+#define EMU_CAP_RESERVED_2 15
+#define EMU_CAP_MEASURE_RTCK_REACT 16
+#define EMU_CAP_SELECT_IF 17
+#define EMU_CAP_RW_MEM_ARM79 18
+#define EMU_CAP_GET_COUNTERS 19
+#define EMU_CAP_READ_DCC 20
+#define EMU_CAP_GET_CPU_CAPS 21
+#define EMU_CAP_EXEC_CPU_CMD 22
+#define EMU_CAP_SWO 23
+#define EMU_CAP_WRITE_DCC_EX 24
+#define EMU_CAP_UPDATE_FIRMWARE_EX 25
+#define EMU_CAP_FILE_IO 26
+#define EMU_CAP_REGISTER 27
+#define EMU_CAP_INDICATORS 28
+#define EMU_CAP_TEST_NET_SPEED 29
+#define EMU_CAP_RAWTRACE 30
+#define EMU_CAP_RESERVED_3 31
+
+static char *jlink_cap_str[] = {
+ "Always 1.",
+ "Supports command EMU_CMD_GET_HARDWARE_VERSION",
+ "Supports command EMU_CMD_WRITE_DCC",
+ "Supports adaptive clocking",
+ "Supports command EMU_CMD_READ_CONFIG",
+ "Supports command EMU_CMD_WRITE_CONFIG",
+ "Supports trace commands",
+ "Supports command EMU_CMD_WRITE_MEM",
+ "Supports command EMU_CMD_READ_MEM",
+ "Supports command EMU_CMD_GET_SPEED",
+ "Supports command EMU_CMD_CODE_...",
+ "Supports command EMU_CMD_GET_MAX_BLOCK_SIZE",
+ "Supports command EMU_CMD_GET_HW_INFO",
+ "Supports command EMU_CMD_SET_KS_POWER",
+ "Supports command EMU_CMD_HW_RELEASE_RESET_STOP_TIMED",
+ "Reserved",
+ "Supports command EMU_CMD_MEASURE_RTCK_REACT",
+ "Supports command EMU_CMD_HW_SELECT_IF",
+ "Supports command EMU_CMD_READ/WRITE_MEM_ARM79",
+ "Supports command EMU_CMD_GET_COUNTERS",
+ "Supports command EMU_CMD_READ_DCC",
+ "Supports command EMU_CMD_GET_CPU_CAPS",
+ "Supports command EMU_CMD_EXEC_CPU_CMD",
+ "Supports command EMU_CMD_SWO",
+ "Supports command EMU_CMD_WRITE_DCC_EX",
+ "Supports command EMU_CMD_UPDATE_FIRMWARE_EX",
+ "Supports command EMU_CMD_FILE_IO",
+ "Supports command EMU_CMD_REGISTER",
+ "Supports command EMU_CMD_INDICATORS",
+ "Supports command EMU_CMD_TEST_NET_SPEED",
+ "Supports command EMU_CMD_RAWTRACE",
+ "Reserved",
+};
/* max speed 12MHz v5.0 jlink */
#define JLINK_MAX_SPEED 12000
static void jlink_state_move(void);
static void jlink_path_move(int num_states, tap_state_t *path);
static void jlink_runtest(int num_cycles);
-static void jlink_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size, struct scan_command *command);
+static void jlink_scan(bool ir_scan, enum scan_type type, uint8_t *buffer,
+ int scan_size, struct scan_command *command);
static void jlink_reset(int trst, int srst);
static void jlink_simple_command(uint8_t command);
static int jlink_get_status(void);
static int jlink_tap_execute(void);
static void jlink_tap_ensure_space(int scans, int bits);
static void jlink_tap_append_step(int tms, int tdi);
-static void jlink_tap_append_scan(int length, uint8_t *buffer, struct scan_command *command);
+static void jlink_tap_append_scan(int length, uint8_t *buffer,
+ struct scan_command *command);
/* Jlink lowlevel functions */
struct jlink {
static struct jlink* jlink_handle;
+/* pid could be specified at runtime */
+static uint16_t vids[] = { VID, 0 };
+static uint16_t pids[] = { PID, 0 };
+
+static uint32_t jlink_caps;
+
/***************************************************************************/
/* External interface implementation */
switch (cmd->type)
{
case JTAG_RUNTEST: jlink_execute_runtest(cmd); break;
- case JTAG_STATEMOVE: jlink_execute_statemove(cmd); break;
+ case JTAG_TLR_RESET: jlink_execute_statemove(cmd); break;
case JTAG_PATHMOVE: jlink_execute_pathmove(cmd); break;
case JTAG_SCAN: jlink_execute_scan(cmd); break;
case JTAG_RESET: jlink_execute_reset(cmd); break;
if (speed > JLINK_MAX_SPEED)
{
- LOG_INFO("Ignoring speed request: %dkHz exceeds %dkHz maximum",
+ LOG_INFO("reduce speed request: %dkHz to %dkHz maximum",
speed, JLINK_MAX_SPEED);
- return ERROR_OK;
+ speed = JLINK_MAX_SPEED;
}
/* check for RTCK setting */
if (jlink_handle == 0)
{
- LOG_ERROR("Cannot find jlink Interface! Please check connection and permissions.");
+ LOG_ERROR("Cannot find jlink Interface! Please check "
+ "connection and permissions.");
return ERROR_JTAG_INIT_FAILED;
}
/*
- * The next three instructions were added after discovering a problem while using an oscilloscope. For the V8
- * SAM-ICE dongle (and likely other j-link device variants), the reset line to the target microprocessor was found to
- * cycle only intermittently during emulator startup (even after encountering the downstream reset instruction later
- * in the code). This was found to create two issues: 1) In general it is a bad practice to not reset a CPU to a known
- * state when starting an emulator and 2) something critical happens inside the dongle when it does the first read
- * following a new USB session. Keeping the processor in reset during the first read collecting version information
- * seems to prevent errant "J-Link command EMU_CMD_VERSION failed" issues.
+ * The next three instructions were added after discovering a problem
+ * while using an oscilloscope.
+ * For the V8 SAM-ICE dongle (and likely other j-link device variants),
+ * the reset line to the target microprocessor was found to cycle only
+ * intermittently during emulator startup (even after encountering the
+ * downstream reset instruction later in the code).
+ * This was found to create two issues:
+ * 1) In general it is a bad practice to not reset a CPU to a known
+ * state when starting an emulator and
+ * 2) something critical happens inside the dongle when it does the
+ * first read following a new USB session.
+ * Keeping the processor in reset during the first read collecting
+ * version information seems to prevent errant
+ * "J-Link command EMU_CMD_VERSION failed" issues.
*/
LOG_INFO("J-Link initialization started / target CPU reset initiated");
jlink_reset(0, 0);
jtag_sleep(3000);
jlink_tap_init();
- jlink_speed(jtag_get_speed());
+ int jtag_speed_var;
+ int retval = jtag_get_speed(&jtag_speed_var);
+ if (retval != ERROR_OK)
+ return retval;
+ jlink_speed(jtag_speed_var);
/* v5/6 jlink seems to have an issue if the first tap move
* is not divisible by 8, so we send a TLR on first power up */
}
else
{
- LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(tap_get_state()), tap_state_name(path[i]));
+ LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition",
+ tap_state_name(tap_get_state()), tap_state_name(path[i]));
exit(-1);
}
}
}
-static void jlink_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size, struct scan_command *command)
+static void jlink_scan(bool ir_scan, enum scan_type type, uint8_t *buffer,
+ int scan_size, struct scan_command *command)
{
tap_state_t saved_end_state;
result = jlink_usb_read(jlink_handle, 8);
if (result != 8)
{
- LOG_ERROR("J-Link command EMU_CMD_GET_STATE failed (%d)\n", result);
+ LOG_ERROR("J-Link command EMU_CMD_GET_STATE failed (%d)", result);
return ERROR_JTAG_DEVICE_ERROR;
}
int vref = usb_in_buffer[0] + (usb_in_buffer[1] << 8);
- LOG_INFO("Vref = %d.%d TCK = %d TDI = %d TDO = %d TMS = %d SRST = %d TRST = %d\n", \
+ LOG_INFO("Vref = %d.%d TCK = %d TDI = %d TDO = %d TMS = %d SRST = %d TRST = %d", \
vref / 1000, vref % 1000, \
usb_in_buffer[2], usb_in_buffer[3], usb_in_buffer[4], \
usb_in_buffer[5], usb_in_buffer[6], usb_in_buffer[7]);
if (vref < 1500)
- LOG_ERROR("Vref too low. Check Target Power\n");
+ LOG_ERROR("Vref too low. Check Target Power");
return ERROR_OK;
}
+#define jlink_dump_printf(context, expr ...) \
+ do { \
+ if (context) \
+ command_print(context, expr); \
+ else \
+ LOG_INFO(expr); \
+ } while(0);
+
+
+static void jlink_caps_dump(struct command_context *ctx)
+{
+ int i;
+
+ jlink_dump_printf(ctx, "J-Link Capabilities");
+
+ for (i = 1; i < 31; i++)
+ if (jlink_caps & (1 << i))
+ jlink_dump_printf(ctx, "%s", jlink_cap_str[i]);
+}
+
static int jlink_get_version_info(void)
{
int result;
int len;
- uint32_t jlink_caps, jlink_max_size;
+ uint32_t jlink_max_size;
/* query hardware version */
jlink_simple_command(EMU_CMD_VERSION);
result = jlink_usb_read(jlink_handle, 2);
if (2 != result)
{
- LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)\n", result);
+ LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)", result);
return ERROR_JTAG_DEVICE_ERROR;
}
result = jlink_usb_read(jlink_handle, len);
if (result != len)
{
- LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)\n", result);
+ LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)", result);
return ERROR_JTAG_DEVICE_ERROR;
}
result = jlink_usb_read(jlink_handle, 4);
if (4 != result)
{
- LOG_ERROR("J-Link command EMU_CMD_GET_CAPS failed (%d)\n", result);
+ LOG_ERROR("J-Link command EMU_CMD_GET_CAPS failed (%d)", result);
return ERROR_JTAG_DEVICE_ERROR;
}
jlink_caps = buf_get_u32(usb_in_buffer, 0, 32);
- LOG_INFO("JLink caps 0x%x", (unsigned)jlink_caps);
+ LOG_INFO("J-Link caps 0x%x", (unsigned)jlink_caps);
if (jlink_caps & (1 << EMU_CAP_GET_HW_VERSION))
{
result = jlink_usb_read(jlink_handle, 4);
if (4 != result)
{
- LOG_ERROR("J-Link command EMU_CMD_GET_HW_VERSION failed (%d)\n", result);
+ LOG_ERROR("J-Link command EMU_CMD_GET_HW_VERSION failed (%d)", result);
return ERROR_JTAG_DEVICE_ERROR;
}
if (major_revision >= 5)
jlink_hw_jtag_version = 3;
- LOG_INFO("JLink hw version %i", (int)jlink_hw_version);
+ LOG_INFO("J-Link hw version %i", (int)jlink_hw_version);
}
if (jlink_caps & (1 << EMU_CAP_GET_MAX_BLOCK_SIZE))
result = jlink_usb_read(jlink_handle, 4);
if (4 != result)
{
- LOG_ERROR("J-Link command EMU_CMD_GET_MAX_MEM_BLOCK failed (%d)\n", result);
+ LOG_ERROR("J-Link command EMU_CMD_GET_MAX_MEM_BLOCK failed (%d)", result);
return ERROR_JTAG_DEVICE_ERROR;
}
jlink_max_size = buf_get_u32(usb_in_buffer, 0, 32);
- LOG_INFO("JLink max mem block %i", (int)jlink_max_size);
+ LOG_INFO("J-Link max mem block %i", (int)jlink_max_size);
}
return ERROR_OK;
}
+COMMAND_HANDLER(jlink_pid_command)
+{
+ if (CMD_ARGC != 1)
+ {
+ LOG_ERROR("Need exactly one argument to jlink_pid");
+ return ERROR_FAIL;
+ }
+
+ pids[0] = strtoul(CMD_ARGV[0], NULL, 16);
+ pids[1] = 0;
+ vids[1] = 0;
+
+ return ERROR_OK;
+}
+
COMMAND_HANDLER(jlink_handle_jlink_info_command)
{
if (jlink_get_version_info() == ERROR_OK)
return ERROR_OK;
}
+COMMAND_HANDLER(jlink_handle_jlink_caps_command)
+{
+ jlink_caps_dump(CMD_CTX);
+
+ return ERROR_OK;
+}
+
COMMAND_HANDLER(jlink_handle_jlink_hw_jtag_command)
{
switch (CMD_ARGC) {
case 0:
- command_print(CMD_CTX, "jlink hw jtag %i", jlink_hw_jtag_version);
+ command_print(CMD_CTX, "J-Link hw jtag %i", jlink_hw_jtag_version);
break;
case 1: {
int request_version = atoi(CMD_ARGV[0]);
return ERROR_OK;
}
-static const struct command_registration jlink_command_handlers[] = {
+static const struct command_registration jlink_subcommand_handlers[] = {
+ {
+ .name = "caps",
+ .handler = &jlink_handle_jlink_caps_command,
+ .mode = COMMAND_EXEC,
+ .help = "show jlink capabilities",
+ },
{
- .name = "jlink_info",
+ .name = "info",
.handler = &jlink_handle_jlink_info_command,
.mode = COMMAND_EXEC,
.help = "show jlink info",
},
{
- .name = "jlink_hw_jtag",
+ .name = "hw_jtag",
.handler = &jlink_handle_jlink_hw_jtag_command,
.mode = COMMAND_EXEC,
.help = "access J-Link HW JTAG command version",
.usage = "[2|3]",
},
+ {
+ .name = "pid",
+ .handler = &jlink_pid_command,
+ .mode = COMMAND_CONFIG,
+ .help = "set the pid of the interface we want to use",
+ },
+ COMMAND_REGISTRATION_DONE
+};
+
+static const struct command_registration jlink_command_handlers[] = {
+ {
+ .name = "jlink",
+ .mode = COMMAND_ANY,
+ .help = "perform jlink management",
+ .chain = jlink_subcommand_handlers,
+ },
COMMAND_REGISTRATION_DONE
};
static void jlink_tap_append_step(int tms, int tdi)
{
- int index = tap_length / 8;
+ int index_var = tap_length / 8;
- if (index >= JLINK_TAP_BUFFER_SIZE)
+ if (index_var >= JLINK_TAP_BUFFER_SIZE)
{
LOG_ERROR("jlink_tap_append_step: overflow");
*(uint32_t *)0xFFFFFFFF = 0;
// we do not pad TMS, so be sure to initialize all bits
if (0 == bit_index)
{
- tms_buffer[index] = tdi_buffer[index] = 0;
+ tms_buffer[index_var] = tdi_buffer[index_var] = 0;
}
if (tms)
- tms_buffer[index] |= bit;
+ tms_buffer[index_var] |= bit;
else
- tms_buffer[index] &= ~bit;
+ tms_buffer[index_var] &= ~bit;
if (tdi)
- tdi_buffer[index] |= bit;
+ tdi_buffer[index_var] |= bit;
else
- tdi_buffer[index] &= ~bit;
+ tdi_buffer[index_var] &= ~bit;
tap_length++;
}
-static void jlink_tap_append_scan(int length, uint8_t *buffer, struct scan_command *command)
+static void jlink_tap_append_scan(int length, uint8_t *buffer,
+ struct scan_command *command)
{
struct pending_scan_result *pending_scan_result =
&pending_scan_results_buffer[pending_scan_results_length];
* WARNING: This will interfere with tap state counting. */
while ((DIV_ROUND_UP(tap_length, 8) % 64) == 0)
{
- jlink_tap_append_step((tap_get_state() == TAP_RESET)?1:0, 0);
+ jlink_tap_append_step((tap_get_state() == TAP_RESET) ? 1 : 0, 0);
}
// number of full bytes (plus one if some would be left over)
result = jlink_usb_message(jlink_handle, 4 + 2 * byte_length, byte_length);
if (result != byte_length)
{
- LOG_ERROR("jlink_tap_execute, wrong result %d (expected %d)", result, byte_length);
+ LOG_ERROR("jlink_tap_execute, wrong result %d (expected %d)",
+ result, byte_length);
jlink_tap_init();
return ERROR_JTAG_QUEUE_FAILED;
}
{
usb_init();
- const uint16_t vids[] = { VID, 0 };
- const uint16_t pids[] = { PID, 0 };
struct usb_dev_handle *dev;
if (jtag_usb_open(vids, pids, &dev) != ERROR_OK)
return NULL;
result2 = jlink_usb_read_emu_result(jlink);
if (1 != result2)
{
- LOG_ERROR("jlink_usb_read_emu_result retried requested = 1, result=%d, in_length=%i", result2,in_length);
+ LOG_ERROR("jlink_usb_read_emu_result retried requested = 1, "
+ "result=%d, in_length=%i", result2, in_length);
/* Try again once, should only happen if (in_length%64 == 0) */
result2 = jlink_usb_read_emu_result(jlink);
if (1 != result2)
return result;
}
-/* calls the given usb_bulk_* function, allowing for the data to trickle in with some timeouts */
+/* calls the given usb_bulk_* function, allowing for the data to
+ * trickle in with some timeouts */
static int usb_bulk_with_retries(
int (*f)(usb_dev_handle *, int, char *, int, int),
usb_dev_handle *dev, int ep,
if (out_length > JLINK_OUT_BUFFER_SIZE)
{
- LOG_ERROR("jlink_write illegal out_length=%d (max=%d)", out_length, JLINK_OUT_BUFFER_SIZE);
+ LOG_ERROR("jlink_write illegal out_length=%d (max=%d)",
+ out_length, JLINK_OUT_BUFFER_SIZE);
return -1;
}
result = usb_bulk_write_ex(jlink->usb_handle, jlink_write_ep,
(char *)usb_out_buffer, out_length, JLINK_USB_TIMEOUT);
- DEBUG_JTAG_IO("jlink_usb_write, out_length = %d, result = %d", out_length, result);
+ DEBUG_JTAG_IO("jlink_usb_write, out_length = %d, result = %d",
+ out_length, result);
#ifdef _DEBUG_USB_COMMS_
jlink_debug_buffer(usb_out_buffer, out_length);
}
}
#endif
-
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