#include "log.h"
-/* enable this to debug communication
- */
-#if 0
-#define _DEBUG_USB_COMMS_
-#endif
-
-#ifdef _DEBUG_JTAG_IO_
-#define DEBUG_JTAG_IO(expr ...) LOG_DEBUG(expr)
-#else
-#define DEBUG_JTAG_IO(expr ...)
-#endif
-
#define VID 0x1366
#define PID 0x0101
#define JLINK_USB_TIMEOUT 1000
-#define JLINK_IN_BUFFER_SIZE 8192
-#define JLINK_OUT_BUFFER_SIZE 8192
+// See Section 1.3.2 of the Segger JLink USB protocol manual
+#define JLINK_IN_BUFFER_SIZE 2048
+#define JLINK_OUT_BUFFER_SIZE 2*2048+4
#define JLINK_EMU_RESULT_BUFFER_SIZE 64
/* Global USB buffers */
static u8 usb_emu_result_buffer[JLINK_EMU_RESULT_BUFFER_SIZE];
/* Constants for JLink command */
-#define EMU_CMD_VERSION 0x01
-#define EMU_CMD_SET_SPEED 0x05
-#define EMU_CMD_GET_STATE 0x07
-#define EMU_CMD_HW_JTAG3 0xcf
-#define EMU_CMD_HW_RESET0 0xdc
-#define EMU_CMD_HW_RESET1 0xdd
-#define EMU_CMD_HW_TRST0 0xde
-#define EMU_CMD_HW_TRST1 0xdf
+#define EMU_CMD_VERSION 0x01
+#define EMU_CMD_SET_SPEED 0x05
+#define EMU_CMD_GET_STATE 0x07
+#define EMU_CMD_HW_JTAG3 0xcf
+#define EMU_CMD_GET_MAX_MEM_BLOCK 0xd4
+#define EMU_CMD_HW_RESET0 0xdc
+#define EMU_CMD_HW_RESET1 0xdd
+#define EMU_CMD_HW_TRST0 0xde
+#define EMU_CMD_HW_TRST1 0xdf
+#define EMU_CMD_GET_CAPS 0xe8
/* max speed 12MHz v5.0 jlink */
#define JLINK_MAX_SPEED 12000
/* External interface functions */
-int jlink_execute_queue(void);
-int jlink_speed(int speed);
-int jlink_khz(int khz, int *jtag_speed);
-int jlink_register_commands(struct command_context_s *cmd_ctx);
-int jlink_init(void);
-int jlink_quit(void);
+static int jlink_execute_queue(void);
+static int jlink_speed(int speed);
+static int jlink_speed_div(int speed, int* khz);
+static int jlink_khz(int khz, int *jtag_speed);
+static int jlink_register_commands(struct command_context_s *cmd_ctx);
+static int jlink_init(void);
+static int jlink_quit(void);
/* CLI command handler functions */
-int jlink_handle_jlink_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
+static int jlink_handle_jlink_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
/* Queue command functions */
-void jlink_end_state(tap_state_t state);
-void jlink_state_move(void);
-void jlink_path_move(int num_states, tap_state_t *path);
-void jlink_runtest(int num_cycles);
-void jlink_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size, scan_command_t *command);
-void jlink_reset(int trst, int srst);
-void jlink_simple_command(u8 command);
-int jlink_get_status(void);
+static void jlink_end_state(tap_state_t state);
+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(int ir_scan, enum scan_type type, u8 *buffer, int scan_size, scan_command_t *command);
+static void jlink_reset(int trst, int srst);
+static void jlink_simple_command(u8 command);
+static int jlink_get_status(void);
/* J-Link tap buffer functions */
-void jlink_tap_init(void);
-int jlink_tap_execute(void);
-void jlink_tap_ensure_space(int scans, int bits);
-void jlink_tap_append_step(int tms, int tdi);
-void jlink_tap_append_scan(int length, u8 *buffer, scan_command_t *command);
+static void jlink_tap_init(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, u8 *buffer, scan_command_t *command);
/* Jlink lowlevel functions */
typedef struct jlink_jtag
struct usb_dev_handle* usb_handle;
} jlink_jtag_t;
-jlink_jtag_t *jlink_usb_open(void);
-void jlink_usb_close(jlink_jtag_t *jlink_jtag);
-int jlink_usb_message(jlink_jtag_t *jlink_jtag, int out_length, int in_length);
-int jlink_usb_write(jlink_jtag_t *jlink_jtag, int out_length);
-int jlink_usb_read(jlink_jtag_t *jlink_jtag);
-int jlink_usb_read_emu_result(jlink_jtag_t *jlink_jtag);
+static jlink_jtag_t *jlink_usb_open(void);
+static void jlink_usb_close(jlink_jtag_t *jlink_jtag);
+static int jlink_usb_message(jlink_jtag_t *jlink_jtag, int out_length, int in_length);
+static int jlink_usb_write(jlink_jtag_t *jlink_jtag, int out_length);
+static int jlink_usb_read(jlink_jtag_t *jlink_jtag, int expected_size);
+static int jlink_usb_read_emu_result(jlink_jtag_t *jlink_jtag);
/* helper functions */
-int jlink_get_version_info(void);
+static int jlink_get_version_info(void);
#ifdef _DEBUG_USB_COMMS_
-void jlink_debug_buffer(u8 *buffer, int length);
+static void jlink_debug_buffer(u8 *buffer, int length);
#endif
-jlink_jtag_t* jlink_jtag_handle;
+static enum tap_state jlink_last_state = TAP_RESET;
+
+static jlink_jtag_t* jlink_jtag_handle;
/***************************************************************************/
/* External interface implementation */
.name = "jlink",
.execute_queue = jlink_execute_queue,
.speed = jlink_speed,
+ .speed_div = jlink_speed_div,
.khz = jlink_khz,
.register_commands = jlink_register_commands,
.init = jlink_init,
.quit = jlink_quit
};
-int jlink_execute_queue(void)
+static void jlink_execute_end_state(jtag_command_t *cmd)
+{
+ DEBUG_JTAG_IO("end_state: %i", cmd->cmd.end_state->end_state);
+
+ if (cmd->cmd.end_state->end_state != TAP_INVALID)
+ jlink_end_state(cmd->cmd.end_state->end_state);
+}
+
+static void jlink_execute_runtest(jtag_command_t *cmd)
+{
+ DEBUG_JTAG_IO("runtest %i cycles, end in %i",
+ cmd->cmd.runtest->num_cycles,
+ cmd->cmd.runtest->end_state);
+
+ if (cmd->cmd.runtest->end_state != TAP_INVALID)
+ jlink_end_state(cmd->cmd.runtest->end_state);
+
+ jlink_runtest(cmd->cmd.runtest->num_cycles);
+}
+
+static void jlink_execute_statemove(jtag_command_t *cmd)
+{
+ DEBUG_JTAG_IO("statemove end in %i", cmd->cmd.statemove->end_state);
+
+ if (cmd->cmd.statemove->end_state != TAP_INVALID)
+ {
+ jlink_end_state(cmd->cmd.statemove->end_state);
+ }
+ jlink_state_move();
+}
+
+static void jlink_execute_pathmove(jtag_command_t *cmd)
+{
+ DEBUG_JTAG_IO("pathmove: %i states, end in %i",
+ cmd->cmd.pathmove->num_states,
+ cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
+
+ jlink_path_move(cmd->cmd.pathmove->num_states,
+ cmd->cmd.pathmove->path);
+}
+
+static void jlink_execute_scan(jtag_command_t *cmd)
{
- jtag_command_t *cmd = jtag_command_queue;
int scan_size;
enum scan_type type;
u8 *buffer;
- while (cmd != NULL)
- {
- switch (cmd->type)
- {
- case JTAG_END_STATE:
- DEBUG_JTAG_IO("end_state: %i", cmd->cmd.end_state->end_state);
-
- if (cmd->cmd.end_state->end_state != -1)
- {
- jlink_end_state(cmd->cmd.end_state->end_state);
- }
- break;
-
- case JTAG_RUNTEST:
- DEBUG_JTAG_IO( "runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles, \
- cmd->cmd.runtest->end_state);
-
- if (cmd->cmd.runtest->end_state != -1)
- {
- jlink_end_state(cmd->cmd.runtest->end_state);
- }
- jlink_runtest(cmd->cmd.runtest->num_cycles);
- break;
-
- case JTAG_STATEMOVE:
- DEBUG_JTAG_IO("statemove end in %i", cmd->cmd.statemove->end_state);
-
- if (cmd->cmd.statemove->end_state != -1)
- {
- jlink_end_state(cmd->cmd.statemove->end_state);
- }
- jlink_state_move();
- break;
-
- case JTAG_PATHMOVE:
- DEBUG_JTAG_IO("pathmove: %i states, end in %i", \
- cmd->cmd.pathmove->num_states, \
- cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
-
- jlink_path_move(cmd->cmd.pathmove->num_states, cmd->cmd.pathmove->path);
- break;
-
- case JTAG_SCAN:
- DEBUG_JTAG_IO("scan end in %i", cmd->cmd.scan->end_state);
-
- if (cmd->cmd.scan->end_state != -1)
- {
- jlink_end_state(cmd->cmd.scan->end_state);
- }
-
- scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
- DEBUG_JTAG_IO("scan input, length = %d", scan_size);
+ DEBUG_JTAG_IO("scan end in %i", cmd->cmd.scan->end_state);
+
+ if (cmd->cmd.scan->end_state != TAP_INVALID)
+ jlink_end_state(cmd->cmd.scan->end_state);
+
+ scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
+ DEBUG_JTAG_IO("scan input, length = %d", scan_size);
#ifdef _DEBUG_USB_COMMS_
- jlink_debug_buffer(buffer, (scan_size + 7) / 8);
+ jlink_debug_buffer(buffer, (scan_size + 7) / 8);
#endif
- type = jtag_scan_type(cmd->cmd.scan);
- jlink_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size, cmd->cmd.scan);
- break;
-
- case JTAG_RESET:
- DEBUG_JTAG_IO("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
-
- jlink_tap_execute();
-
- if (cmd->cmd.reset->trst == 1)
- {
- tap_set_state(TAP_RESET);
- }
- jlink_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
- break;
-
- case JTAG_SLEEP:
- DEBUG_JTAG_IO("sleep %i", cmd->cmd.sleep->us);
- jlink_tap_execute();
- jtag_sleep(cmd->cmd.sleep->us);
- break;
-
- default:
- LOG_ERROR("BUG: unknown JTAG command type encountered");
- exit(-1);
- }
+ type = jtag_scan_type(cmd->cmd.scan);
+ jlink_scan(cmd->cmd.scan->ir_scan,
+ type, buffer, scan_size, cmd->cmd.scan);
+}
+
+static void jlink_execute_reset(jtag_command_t *cmd)
+{
+ DEBUG_JTAG_IO("reset trst: %i srst %i",
+ cmd->cmd.reset->trst, cmd->cmd.reset->srst);
+
+ jlink_tap_execute();
+
+ if (cmd->cmd.reset->trst == 1)
+ tap_set_state(TAP_RESET);
+
+ jlink_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
+}
+
+static void jlink_execute_sleep(jtag_command_t *cmd)
+{
+ DEBUG_JTAG_IO("sleep %i", cmd->cmd.sleep->us);
+ jlink_tap_execute();
+ jtag_sleep(cmd->cmd.sleep->us);
+}
+
+static void jlink_execute_command(jtag_command_t *cmd)
+{
+ switch (cmd->type)
+ {
+ case JTAG_END_STATE: jlink_execute_end_state(cmd); break;
+ case JTAG_RUNTEST: jlink_execute_runtest(cmd); break;
+ case JTAG_STATEMOVE: 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;
+ case JTAG_SLEEP: jlink_execute_sleep(cmd); break;
+ default:
+ LOG_ERROR("BUG: unknown JTAG command type encountered");
+ exit(-1);
+ }
+}
+
+static int jlink_execute_queue(void)
+{
+ jtag_command_t *cmd = jtag_command_queue;
+
+ while (cmd != NULL)
+ {
+ jlink_execute_command(cmd);
cmd = cmd->next;
}
}
/* Sets speed in kHz. */
-int jlink_speed(int speed)
+static int jlink_speed(int speed)
{
int result;
- if (speed <= JLINK_MAX_SPEED)
+ if (speed > JLINK_MAX_SPEED)
{
- /* check for RTCK setting */
- if (speed == 0)
- speed = -1;
+ LOG_INFO("Ignoring speed request: %dkHz exceeds %dkHz maximum",
+ speed, JLINK_MAX_SPEED);
+ return ERROR_OK;
+ }
- usb_out_buffer[0] = EMU_CMD_SET_SPEED;
- usb_out_buffer[1] = (speed >> 0) & 0xff;
- usb_out_buffer[2] = (speed >> 8) & 0xff;
+ /* check for RTCK setting */
+ if (speed == 0)
+ speed = -1;
- result = jlink_usb_write(jlink_jtag_handle, 3);
+ usb_out_buffer[0] = EMU_CMD_SET_SPEED;
+ usb_out_buffer[1] = (speed >> 0) & 0xff;
+ usb_out_buffer[2] = (speed >> 8) & 0xff;
- if (result == 3)
- {
- return ERROR_OK;
- }
- else
- {
- LOG_ERROR("J-Link setting speed failed (%d)", result);
- return ERROR_JTAG_DEVICE_ERROR;
- }
- }
- else
+ result = jlink_usb_write(jlink_jtag_handle, 3);
+ if (result != 3)
{
- LOG_INFO("Requested speed %dkHz exceeds maximum of %dkHz, ignored", speed, JLINK_MAX_SPEED);
+ LOG_ERROR("J-Link setting speed failed (%d)", result);
+ return ERROR_JTAG_DEVICE_ERROR;
}
return ERROR_OK;
}
-int jlink_khz(int khz, int *jtag_speed)
+static int jlink_speed_div(int speed, int* khz)
+{
+ *khz = speed;
+
+ return ERROR_OK;
+}
+
+static int jlink_khz(int khz, int *jtag_speed)
{
*jtag_speed = khz;
return ERROR_OK;
}
-int jlink_register_commands(struct command_context_s *cmd_ctx)
+static int jlink_register_commands(struct command_context_s *cmd_ctx)
{
register_command(cmd_ctx, NULL, "jlink_info", jlink_handle_jlink_info_command, COMMAND_EXEC,
"query jlink info");
return ERROR_OK;
}
-int jlink_init(void)
+static int jlink_init(void)
{
int check_cnt;
jlink_reset(0, 0);
jlink_tap_init();
+ jlink_speed(jtag_speed);
return ERROR_OK;
}
-int jlink_quit(void)
+static int jlink_quit(void)
{
jlink_usb_close(jlink_jtag_handle);
return ERROR_OK;
/***************************************************************************/
/* Queue command implementations */
-void jlink_end_state(tap_state_t state)
+static void jlink_end_state(tap_state_t state)
{
if (tap_is_state_stable(state))
{
}
/* Goes to the end state. */
-void jlink_state_move(void)
+static void jlink_state_move(void)
{
int i;
int tms = 0;
tap_set_state(tap_get_end_state());
}
-void jlink_path_move(int num_states, tap_state_t *path)
+static void jlink_path_move(int num_states, tap_state_t *path)
{
int i;
for (i = 0; i < num_states; i++)
{
- if (path[i] == tap_state_transition(tap_get_state(), FALSE))
+ if (path[i] == tap_state_transition(tap_get_state(), false))
{
jlink_tap_append_step(0, 0);
}
- else if (path[i] == tap_state_transition(tap_get_state(), TRUE))
+ else if (path[i] == tap_state_transition(tap_get_state(), true))
{
jlink_tap_append_step(1, 0);
}
tap_set_end_state(tap_get_state());
}
-void jlink_runtest(int num_cycles)
+static void jlink_runtest(int num_cycles)
{
int i;
}
}
-void jlink_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size, scan_command_t *command)
+static void jlink_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size, scan_command_t *command)
{
tap_state_t saved_end_state;
/* Move to appropriate scan state */
jlink_end_state(ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
- jlink_state_move();
+ /* Only move if we're not already there */
+ if (tap_get_state() != tap_get_end_state())
+ jlink_state_move();
+
jlink_end_state(saved_end_state);
/* Scan */
}
}
-void jlink_reset(int trst, int srst)
+static void jlink_reset(int trst, int srst)
{
LOG_DEBUG("trst: %i, srst: %i", trst, srst);
if (srst == 0)
{
jlink_simple_command(EMU_CMD_HW_RESET1);
+ jlink_end_state(TAP_RESET);
+ jlink_state_move();
}
else if (srst == 1)
{
if (trst == 0)
{
jlink_simple_command(EMU_CMD_HW_TRST1);
+ jlink_end_state(TAP_RESET);
+ jlink_state_move();
}
else if (trst == 1)
{
}
}
-void jlink_simple_command(u8 command)
+static void jlink_simple_command(u8 command)
{
int result;
}
}
-int jlink_get_status(void)
+static int jlink_get_status(void)
{
int result;
jlink_simple_command(EMU_CMD_GET_STATE);
- result = jlink_usb_read(jlink_jtag_handle);
- if (result == 8)
- {
- 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", \
- 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");
- }
- }
- else
+ result = jlink_usb_read(jlink_jtag_handle, 8);
+ if (result != 8)
{
LOG_ERROR("J-Link command EMU_CMD_GET_STATE failed (%d)\n", 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", \
+ 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");
+
return ERROR_OK;
}
-int jlink_get_version_info(void)
+static int jlink_get_version_info(void)
{
int result;
- int len = 0;
+ int len;
+ u32 jlink_caps, jlink_max_size;
/* query hardware version */
jlink_simple_command(EMU_CMD_VERSION);
- result = jlink_usb_read(jlink_jtag_handle);
- if (result == 2)
+ result = jlink_usb_read(jlink_jtag_handle, 2);
+ if (2 != result)
{
- len = buf_get_u32(usb_in_buffer, 0, 16);
- result = jlink_usb_read(jlink_jtag_handle);
+ LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)\n", result);
+ return ERROR_JTAG_DEVICE_ERROR;
+ }
- if (result == len)
- {
- usb_in_buffer[result] = 0;
- LOG_INFO(usb_in_buffer);
- return ERROR_OK;
- }
+ len = buf_get_u32(usb_in_buffer, 0, 16);
+ result = jlink_usb_read(jlink_jtag_handle, len);
+ if (result != len)
+ {
+ LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)\n", result);
+ return ERROR_JTAG_DEVICE_ERROR;
+ }
+
+ usb_in_buffer[result] = 0;
+ LOG_INFO("%s", (char *)usb_in_buffer);
+
+ /* query hardware capabilities */
+ jlink_simple_command(EMU_CMD_GET_CAPS);
+
+ result = jlink_usb_read(jlink_jtag_handle, 4);
+ if (4 != result)
+ {
+ LOG_ERROR("J-Link command EMU_CMD_GET_CAPS failed (%d)\n", result);
+ return ERROR_JTAG_DEVICE_ERROR;
}
- LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)\n", result);
- return ERROR_JTAG_DEVICE_ERROR;
+ jlink_caps = buf_get_u32(usb_in_buffer, 0, 32);
+ LOG_INFO("JLink caps 0x%x", jlink_caps);
+
+
+ /* query hardware maximum memory block */
+ jlink_simple_command(EMU_CMD_GET_MAX_MEM_BLOCK);
+
+ result = jlink_usb_read(jlink_jtag_handle, 4);
+ if (4 != result)
+ {
+ LOG_ERROR("J-Link command EMU_CMD_GET_MAX_MEM_BLOCK failed (%d)\n", result);
+ return ERROR_JTAG_DEVICE_ERROR;
+ }
+
+ jlink_max_size = buf_get_u32(usb_in_buffer, 0, 32);
+ LOG_INFO("JLink max mem block %i", jlink_max_size);
+
+
+ return ERROR_OK;
}
-int jlink_handle_jlink_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+static int jlink_handle_jlink_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
if (jlink_get_version_info() == ERROR_OK)
{
/* 2048 is the max value we can use here */
#define JLINK_TAP_BUFFER_SIZE 2048
-static int tap_length;
+static unsigned tap_length;
static u8 tms_buffer[JLINK_TAP_BUFFER_SIZE];
static u8 tdi_buffer[JLINK_TAP_BUFFER_SIZE];
static u8 tdo_buffer[JLINK_TAP_BUFFER_SIZE];
static int last_tms;
-void jlink_tap_init(void)
+static void jlink_tap_init(void)
{
tap_length = 0;
pending_scan_results_length = 0;
}
-void jlink_tap_ensure_space(int scans, int bits)
+static void jlink_tap_ensure_space(int scans, int bits)
{
int available_scans = MAX_PENDING_SCAN_RESULTS - pending_scan_results_length;
int available_bits = JLINK_TAP_BUFFER_SIZE * 8 - tap_length;
}
}
-void jlink_tap_append_step(int tms, int tdi)
+static void jlink_tap_append_step(int tms, int tdi)
{
last_tms = tms;
int index = tap_length / 8;
- if (index < JLINK_TAP_BUFFER_SIZE)
+ if (index >= JLINK_TAP_BUFFER_SIZE)
{
- int bit_index = tap_length % 8;
- u8 bit = 1 << bit_index;
+ LOG_ERROR("jlink_tap_append_step: overflow");
+ exit(-1);
+ }
- if (tms)
- {
- tms_buffer[index] |= bit;
- }
- else
- {
- tms_buffer[index] &= ~bit;
- }
+ int bit_index = tap_length % 8;
+ u8 bit = 1 << bit_index;
- if (tdi)
- {
- tdi_buffer[index] |= bit;
- }
- else
- {
- tdi_buffer[index] &= ~bit;
- }
+ // we do not pad TMS, so be sure to initialize all bits
+ if (0 == bit_index)
+ tms_buffer[index] = tdi_buffer[index] = 0;
- tap_length++;
- }
+ if (tms)
+ tms_buffer[index] |= bit;
else
- {
- LOG_ERROR("jlink_tap_append_step, overflow");
- }
+ tms_buffer[index] &= ~bit;
+
+ if (tdi)
+ tdi_buffer[index] |= bit;
+ else
+ tdi_buffer[index] &= ~bit;
+
+ tap_length++;
}
-void jlink_tap_append_scan(int length, u8 *buffer, scan_command_t *command)
+static void jlink_tap_append_scan(int length, u8 *buffer, scan_command_t *command)
{
- pending_scan_result_t *pending_scan_result = &pending_scan_results_buffer[pending_scan_results_length];
+ pending_scan_result_t *pending_scan_result =
+ &pending_scan_results_buffer[pending_scan_results_length];
int i;
pending_scan_result->first = tap_length;
for (i = 0; i < length; i++)
{
- jlink_tap_append_step((i < length-1 ? 0 : 1), (buffer[i/8] >> (i%8)) & 1);
+ int tms = i < length - 1 ? 0 : 1;
+ int tdi = buffer[i / 8] & (1 << (i % 8));
+ jlink_tap_append_step(tms, tdi);
}
pending_scan_results_length++;
}
/* Pad and send a tap sequence to the device, and receive the answer.
* For the purpose of padding we assume that we are in idle or pause state. */
-int jlink_tap_execute(void)
+static int jlink_tap_execute(void)
{
int byte_length;
- int tms_offset;
- int tdi_offset;
int i;
int result;
- if (tap_length > 0)
- {
- /* Pad last byte so that tap_length is divisible by 8 */
- while (tap_length % 8 != 0)
- {
- /* More of the last TMS value keeps us in the same state,
- * analogous to free-running JTAG interfaces. */
- jlink_tap_append_step(last_tms, 0);
- }
+ if (!tap_length)
+ return ERROR_OK;
- byte_length = tap_length / 8;
+ // number of full bytes (plus one if some would be left over)
+ byte_length = TAP_SCAN_BYTES(tap_length);
- usb_out_buffer[0] = EMU_CMD_HW_JTAG3;
- usb_out_buffer[1] = 0;
- usb_out_buffer[2] = (tap_length >> 0) & 0xff;
- usb_out_buffer[3] = (tap_length >> 8) & 0xff;
+ usb_out_buffer[0] = EMU_CMD_HW_JTAG3;
+ usb_out_buffer[1] = 0;
+ usb_out_buffer[2] = (tap_length >> 0) & 0xff;
+ usb_out_buffer[3] = (tap_length >> 8) & 0xff;
+ memcpy(usb_out_buffer + 4, tms_buffer, byte_length);
+ memcpy(usb_out_buffer + 4 + byte_length, tdi_buffer, byte_length);
- tms_offset = 4;
- for (i = 0; i < byte_length; i++)
- {
- usb_out_buffer[tms_offset + i] = tms_buffer[i];
- }
+ jlink_last_state = jtag_debug_state_machine(tms_buffer, tdi_buffer,
+ tap_length, jlink_last_state);
- tdi_offset = tms_offset + byte_length;
- for (i = 0; i < byte_length; i++)
- {
- usb_out_buffer[tdi_offset + i] = tdi_buffer[i];
- }
+ result = jlink_usb_message(jlink_jtag_handle, 4 + 2 * byte_length, byte_length);
+ if (result != byte_length)
+ {
+ LOG_ERROR("jlink_tap_execute, wrong result %d (expected %d)", result, byte_length);
+ jlink_tap_init();
+ return ERROR_JTAG_QUEUE_FAILED;
+ }
- result = jlink_usb_message(jlink_jtag_handle, 4 + 2 * byte_length, byte_length);
+ memcpy(tdo_buffer, usb_in_buffer, byte_length);
- if (result == byte_length)
- {
- for (i = 0; i < byte_length; i++)
- {
- tdo_buffer[i] = usb_in_buffer[i];
- }
-
- for (i = 0; i < pending_scan_results_length; i++)
- {
- pending_scan_result_t *pending_scan_result = &pending_scan_results_buffer[i];
- u8 *buffer = pending_scan_result->buffer;
- int length = pending_scan_result->length;
- int first = pending_scan_result->first;
- scan_command_t *command = pending_scan_result->command;
+ for (i = 0; i < pending_scan_results_length; i++)
+ {
+ pending_scan_result_t *pending_scan_result = &pending_scan_results_buffer[i];
+ u8 *buffer = pending_scan_result->buffer;
+ int length = pending_scan_result->length;
+ int first = pending_scan_result->first;
+ scan_command_t *command = pending_scan_result->command;
- /* Copy to buffer */
- buf_set_buf(tdo_buffer, first, buffer, 0, length);
+ /* Copy to buffer */
+ buf_set_buf(tdo_buffer, first, buffer, 0, length);
- DEBUG_JTAG_IO("pending scan result, length = %d", length);
+ DEBUG_JTAG_IO("pending scan result, length = %d", length);
#ifdef _DEBUG_USB_COMMS_
- jlink_debug_buffer(buffer, byte_length);
+ jlink_debug_buffer(buffer, byte_length);
#endif
- if (jtag_read_buffer(buffer, command) != ERROR_OK)
- {
- jlink_tap_init();
- return ERROR_JTAG_QUEUE_FAILED;
- }
-
- if (pending_scan_result->buffer != NULL)
- {
- free(pending_scan_result->buffer);
- }
- }
- }
- else
+ if (jtag_read_buffer(buffer, command) != ERROR_OK)
{
- LOG_ERROR("jlink_tap_execute, wrong result %d, expected %d", result, byte_length);
+ jlink_tap_init();
return ERROR_JTAG_QUEUE_FAILED;
}
- jlink_tap_init();
+ if (pending_scan_result->buffer != NULL)
+ {
+ free(pending_scan_result->buffer);
+ }
}
+ jlink_tap_init();
return ERROR_OK;
}
/*****************************************************************************/
/* JLink USB low-level functions */
-jlink_jtag_t* jlink_usb_open()
+static jlink_jtag_t* jlink_usb_open()
{
struct usb_bus *busses;
struct usb_bus *bus;
return NULL;
}
-void jlink_usb_close(jlink_jtag_t *jlink_jtag)
+static void jlink_usb_close(jlink_jtag_t *jlink_jtag)
{
usb_close(jlink_jtag->usb_handle);
free(jlink_jtag);
}
/* Send a message and receive the reply. */
-int jlink_usb_message(jlink_jtag_t *jlink_jtag, int out_length, int in_length)
+static int jlink_usb_message(jlink_jtag_t *jlink_jtag, int out_length, int in_length)
{
int result;
int result2;
result = jlink_usb_write(jlink_jtag, out_length);
- if (result == out_length)
+ if (result != out_length)
{
- result = jlink_usb_read(jlink_jtag);
- if (result == in_length || result == in_length+1)
- {
- if (result == in_length)
- {
- /* Must read the result from the EMU too */
- result2 = jlink_usb_read_emu_result(jlink_jtag);
- if (1 == result2)
- {
- /* Check the result itself */
- if (0 == usb_emu_result_buffer[0])
- {
- return result;
- }
- else
- {
- LOG_ERROR("jlink_usb_read_emu_result (requested=0, result=%d)", usb_emu_result_buffer[0]);
- return -1;
- }
- }
- else
- {
- LOG_ERROR("jlink_usb_read_emu_result len (requested=1, result=%d)", result2);
- return -1;
- }
- }
- else
- {
- /* Check the result itself */
- if (0 == usb_in_buffer[result-1])
- {
- return result-1;
- }
- else
- {
- LOG_ERROR("jlink_usb_read_emu_result (requested=0, result=%d)", usb_in_buffer[result]);
- return -1;
- }
- }
- }
- else
+ LOG_ERROR("usb_bulk_write failed (requested=%d, result=%d)",
+ out_length, result);
+ return ERROR_JTAG_DEVICE_ERROR;
+ }
+
+ result = jlink_usb_read(jlink_jtag, in_length);
+ if ((result != in_length) && (result != (in_length + 1)))
+ {
+ LOG_ERROR("usb_bulk_read failed (requested=%d, result=%d)",
+ in_length, result);
+ return ERROR_JTAG_DEVICE_ERROR;
+ }
+
+ if (result == in_length)
+ {
+ /* Must read the result from the EMU too */
+ result2 = jlink_usb_read_emu_result(jlink_jtag);
+ if (1 != result2)
{
- LOG_ERROR("usb_bulk_read failed (requested=%d, result=%d)", in_length, result);
- return -1;
+ LOG_ERROR("jlink_usb_read_emu_result failed "
+ "(requested=1, result=%d)", result2);
+ return ERROR_JTAG_DEVICE_ERROR;
}
+
+ /* Check the result itself */
+ result2 = usb_emu_result_buffer[0];
}
else
{
- LOG_ERROR("usb_bulk_write failed (requested=%d, result=%d)", out_length, result);
- return -1;
+ /* Save the result, then remove it from return value */
+ result2 = usb_in_buffer[result--];
}
+
+ if (result2)
+ {
+ LOG_ERROR("jlink_usb_message failed with result=%d)", result2);
+ return ERROR_JTAG_DEVICE_ERROR;
+ }
+
+ return result;
+}
+
+/* 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,
+ char *bytes, int size, int timeout)
+{
+ int rc = 0, tries = 3, this_size;
+
+ while (tries && size) {
+
+ this_size = f(dev, ep, bytes, size, timeout);
+ if (this_size > 0) {
+
+ size -= this_size;
+ rc += this_size;
+ bytes += this_size;
+
+ } else
+ tries --;
+ }
+ return rc;
+}
+static inline int usb_bulk_write_ex(usb_dev_handle *dev, int ep,
+ char *bytes, int size, int timeout)
+{
+ return usb_bulk_with_retries(&usb_bulk_write,
+ dev, ep, bytes, size, timeout);
+}
+static inline int usb_bulk_read_ex(usb_dev_handle *dev, int ep,
+ char *bytes, int size, int timeout)
+{
+ return usb_bulk_with_retries(&usb_bulk_read,
+ dev, ep, bytes, size, timeout);
}
/* Write data from out_buffer to USB. */
-int jlink_usb_write(jlink_jtag_t *jlink_jtag, int out_length)
+static int jlink_usb_write(jlink_jtag_t *jlink_jtag, int out_length)
{
int result;
return -1;
}
- result = usb_bulk_write(jlink_jtag->usb_handle, JLINK_WRITE_ENDPOINT, \
- usb_out_buffer, out_length, JLINK_USB_TIMEOUT);
+ result = usb_bulk_write_ex(jlink_jtag->usb_handle, JLINK_WRITE_ENDPOINT,
+ (char *)usb_out_buffer, out_length, JLINK_USB_TIMEOUT);
DEBUG_JTAG_IO("jlink_usb_write, out_length = %d, result = %d", out_length, result);
}
/* Read data from USB into in_buffer. */
-int jlink_usb_read(jlink_jtag_t *jlink_jtag)
+static int jlink_usb_read(jlink_jtag_t *jlink_jtag, int expected_size)
{
- int result = usb_bulk_read(jlink_jtag->usb_handle, JLINK_READ_ENDPOINT, \
- usb_in_buffer, JLINK_IN_BUFFER_SIZE, JLINK_USB_TIMEOUT);
+ int result = usb_bulk_read_ex(jlink_jtag->usb_handle, JLINK_READ_ENDPOINT,
+ (char *)usb_in_buffer, expected_size, JLINK_USB_TIMEOUT);
DEBUG_JTAG_IO("jlink_usb_read, result = %d", result);
}
/* Read the result from the previous EMU cmd into result_buffer. */
-int jlink_usb_read_emu_result(jlink_jtag_t *jlink_jtag)
+static int jlink_usb_read_emu_result(jlink_jtag_t *jlink_jtag)
{
- int result = usb_bulk_read(jlink_jtag->usb_handle, JLINK_READ_ENDPOINT, \
- usb_emu_result_buffer, JLINK_EMU_RESULT_BUFFER_SIZE, JLINK_USB_TIMEOUT);
+ int result = usb_bulk_read_ex(jlink_jtag->usb_handle, JLINK_READ_ENDPOINT,
+ (char *)usb_emu_result_buffer, 1 /* JLINK_EMU_RESULT_BUFFER_SIZE */,
+ JLINK_USB_TIMEOUT);
DEBUG_JTAG_IO("jlink_usb_read_result, result = %d", result);
#ifdef _DEBUG_USB_COMMS_
#define BYTES_PER_LINE 16
-void jlink_debug_buffer(u8 *buffer, int length)
+static void jlink_debug_buffer(u8 *buffer, int length)
{
char line[81];
char s[4];
snprintf(s, 4, " %02x", buffer[j]);
strcat(line, s);
}
- LOG_DEBUG(line);
+ LOG_DEBUG("%s", line);
}
}
#endif
projects / openocd / blobdiff