* Copyright (C) 2007 by Juergen Stuber <juergen@jstuber.net> *
* based on Dominic Rath's and Benedikt Sauter's usbprog.c *
* *
+ * Copyright (C) 2008 by Spencer Oliver *
+ * spen@spen-soft.co.uk *
+ * *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
#define JLINK_WRITE_ENDPOINT 0x02
#define JLINK_READ_ENDPOINT 0x81
-#define JLINK_USB_TIMEOUT 100
+#define JLINK_USB_TIMEOUT 1000
-#define JLINK_IN_BUFFER_SIZE 2064
-#define JLINK_OUT_BUFFER_SIZE 2064
+#define JLINK_IN_BUFFER_SIZE 8192
+#define JLINK_OUT_BUFFER_SIZE 8192
+#define JLINK_EMU_RESULT_BUFFER_SIZE 64
/* Global USB buffers */
static u8 usb_in_buffer[JLINK_IN_BUFFER_SIZE];
static u8 usb_out_buffer[JLINK_OUT_BUFFER_SIZE];
+static u8 usb_emu_result_buffer[JLINK_EMU_RESULT_BUFFER_SIZE];
/* Constants for JLink command */
-
-/* The JLINK_TAP_SEQUENCE_COMMAND is obsolete
- * and we should use EMU_CMD_HW_JTAG instead */
-#define JLINK_TAP_SEQUENCE_COMMAND 0xcd
-
#define EMU_CMD_VERSION 0x01
#define EMU_CMD_SET_SPEED 0x05
#define EMU_CMD_GET_STATE 0x07
-#define EMU_CMD_HW_JTAG 0xcf
+#define EMU_CMD_HW_JTAG3 0xcf
#define EMU_CMD_HW_RESET0 0xdc
#define EMU_CMD_HW_RESET1 0xdd
#define EMU_CMD_HW_TRST0 0xde
int jlink_get_status(void);
/* J-Link tap buffer functions */
-void jlink_tap_init();
-int jlink_tap_execute();
+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);
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);
/* helper functions */
int jlink_get_version_info(void);
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);
-
+ 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]);
-
+ 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);
-
+
#ifdef _DEBUG_USB_COMMS_
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);
-
+ 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)
{
- cur_state = TAP_TLR;
+ cur_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);
}
cmd = cmd->next;
}
-
+
return jlink_tap_execute();
}
int jlink_speed(int speed)
{
int result;
-
+
if (speed <= JLINK_MAX_SPEED)
{
/* check for RTCK setting */
if (speed == 0)
speed = -1;
-
+
usb_out_buffer[0] = EMU_CMD_SET_SPEED;
usb_out_buffer[1] = (speed >> 0) & 0xff;
usb_out_buffer[2] = (speed >> 8) & 0xff;
-
+
result = jlink_usb_write(jlink_jtag_handle, 3);
-
+
if (result == 3)
{
return ERROR_OK;
{
LOG_INFO("Requested speed %dkHz exceeds maximum of %dkHz, ignored", speed, JLINK_MAX_SPEED);
}
-
+
return ERROR_OK;
}
int jlink_khz(int khz, int *jtag_speed)
{
*jtag_speed = khz;
-
+
return ERROR_OK;
}
int jlink_init(void)
{
- int check_cnt;
-
+ int check_cnt;
+
jlink_jtag_handle = jlink_usb_open();
-
+
if (jlink_jtag_handle == 0)
{
- LOG_ERROR("Can't find USB JTAG Interface! Please check connection and permissions.");
+ LOG_ERROR("Cannot find jlink Interface! Please check connection and permissions.");
return ERROR_JTAG_INIT_FAILED;
}
-
+
check_cnt = 0;
while (check_cnt < 3)
{
jlink_get_status();
break;
}
-
+
check_cnt++;
}
{
LOG_INFO("J-Link initial read failed, don't worry");
}
-
+
LOG_INFO("J-Link JTAG Interface ready");
-
+
jlink_reset(0, 0);
jlink_tap_init();
-
+
return ERROR_OK;
}
int i;
int tms = 0;
u8 tms_scan = TAP_MOVE(cur_state, end_state);
-
+
for (i = 0; i < 7; i++)
{
tms = (tms_scan >> i) & 1;
jlink_tap_append_step(tms, 0);
}
-
+
cur_state = end_state;
}
void jlink_path_move(int num_states, enum tap_state *path)
{
int i;
-
+
for (i = 0; i < num_states; i++)
{
if (path[i] == tap_transitions[cur_state].low)
}
else
{
- LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_strings[cur_state], tap_state_strings[path[i]]);
+ LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", jtag_state_name(cur_state), jtag_state_name(path[i]));
exit(-1);
}
-
+
cur_state = path[i];
}
-
+
end_state = cur_state;
}
void jlink_runtest(int num_cycles)
{
int i;
-
+
enum tap_state saved_end_state = end_state;
-
- /* only do a state_move when we're not already in RTI */
- if (cur_state != TAP_RTI)
+
+ /* only do a state_move when we're not already in IDLE */
+ if (cur_state != TAP_IDLE)
{
- jlink_end_state(TAP_RTI);
+ jlink_end_state(TAP_IDLE);
jlink_state_move();
}
-
+
/* execute num_cycles */
for (i = 0; i < num_cycles; i++)
{
jlink_tap_append_step(0, 0);
}
-
+
/* finish in end_state */
jlink_end_state(saved_end_state);
if (cur_state != end_state)
void jlink_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size, scan_command_t *command)
{
enum tap_state saved_end_state;
-
+
jlink_tap_ensure_space(1, scan_size + 8);
-
+
saved_end_state = end_state;
-
+
/* Move to appropriate scan state */
- jlink_end_state(ir_scan ? TAP_SI : TAP_SD);
-
+ jlink_end_state(ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
+
jlink_state_move();
jlink_end_state(saved_end_state);
-
+
/* Scan */
jlink_tap_append_scan(scan_size, buffer, command);
-
+
/* We are in Exit1, go to Pause */
jlink_tap_append_step(0, 0);
-
- cur_state = ir_scan ? TAP_PI : TAP_PD;
-
+
+ cur_state = ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE;
+
if (cur_state != end_state)
{
jlink_state_move();
void jlink_reset(int trst, int srst)
{
LOG_DEBUG("trst: %i, srst: %i", trst, srst);
-
+
/* Signals are active low */
- if (trst == 0)
- {
- jlink_simple_command(EMU_CMD_HW_TRST1);
- }
- else if (trst == 1)
- {
- jlink_simple_command(EMU_CMD_HW_TRST0);
- }
-
if (srst == 0)
{
jlink_simple_command(EMU_CMD_HW_RESET1);
{
jlink_simple_command(EMU_CMD_HW_RESET0);
}
+
+ if (trst == 0)
+ {
+ jlink_simple_command(EMU_CMD_HW_TRST1);
+ }
+ else if (trst == 1)
+ {
+ jlink_simple_command(EMU_CMD_HW_TRST0);
+ }
}
void jlink_simple_command(u8 command)
{
int result;
-
+
DEBUG_JTAG_IO("0x%02x", command);
-
+
usb_out_buffer[0] = command;
result = jlink_usb_write(jlink_jtag_handle, 1);
-
+
if (result != 1)
{
LOG_ERROR("J-Link command 0x%02x failed (%d)", command, result);
int jlink_get_status(void)
{
int result;
-
+
jlink_simple_command(EMU_CMD_GET_STATE);
result = jlink_usb_read(jlink_jtag_handle);
-
- if(result == 8)
+
+ 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", \
+ 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)
+
+ if (vref < 1500)
{
- LOG_ERROR("Vref too low. Eventually the target isn't powered or disconnected?\n");
+ LOG_ERROR("Vref too low. Check Target Power\n");
}
}
else
{
LOG_ERROR("J-Link command EMU_CMD_GET_STATE failed (%d)\n", result);
}
-
+
return ERROR_OK;
}
{
int result;
int len = 0;
-
+
/* query hardware version */
jlink_simple_command(EMU_CMD_VERSION);
result = jlink_usb_read(jlink_jtag_handle);
-
+
if (result == 2)
{
len = buf_get_u32(usb_in_buffer, 0, 16);
result = jlink_usb_read(jlink_jtag_handle);
-
- if(result == len)
+
+ if (result == len)
{
usb_in_buffer[result] = 0;
LOG_INFO(usb_in_buffer);
return ERROR_OK;
}
}
-
+
LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)\n", result);
return ERROR_JTAG_DEVICE_ERROR;
}
/* attempt to get status */
jlink_get_status();
}
-
+
return ERROR_OK;
}
/***************************************************************************/
/* J-Link tap functions */
-/* We use the maximal value observed */
-#define JLINK_TAP_BUFFER_SIZE 390
+/* 2048 is the max value we can use here */
+#define JLINK_TAP_BUFFER_SIZE 2048
static int tap_length;
static u8 tms_buffer[JLINK_TAP_BUFFER_SIZE];
u8 *buffer;
} pending_scan_result_t;
-#define MAX_PENDING_SCAN_RESULTS 16
+#define MAX_PENDING_SCAN_RESULTS 256
static int pending_scan_results_length;
static pending_scan_result_t pending_scan_results_buffer[MAX_PENDING_SCAN_RESULTS];
static int last_tms;
-void jlink_tap_init()
+void jlink_tap_init(void)
{
tap_length = 0;
pending_scan_results_length = 0;
{
int available_scans = MAX_PENDING_SCAN_RESULTS - pending_scan_results_length;
int available_bits = JLINK_TAP_BUFFER_SIZE * 8 - tap_length;
-
+
if (scans > available_scans || bits > available_bits)
{
jlink_tap_execute();
{
last_tms = tms;
int index = tap_length / 8;
-
+
if (index < JLINK_TAP_BUFFER_SIZE)
{
int bit_index = tap_length % 8;
u8 bit = 1 << bit_index;
-
+
if (tms)
{
tms_buffer[index] |= bit;
{
tms_buffer[index] &= ~bit;
}
-
+
if (tdi)
{
tdi_buffer[index] |= bit;
{
tdi_buffer[index] &= ~bit;
}
-
+
tap_length++;
}
else
{
pending_scan_result_t *pending_scan_result = &pending_scan_results_buffer[pending_scan_results_length];
int i;
-
+
pending_scan_result->first = tap_length;
pending_scan_result->length = length;
pending_scan_result->command = command;
pending_scan_result->buffer = buffer;
-
+
for (i = 0; i < length; i++)
{
jlink_tap_append_step((i < length-1 ? 0 : 1), (buffer[i/8] >> (i%8)) & 1);
/* 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()
+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 */
* analogous to free-running JTAG interfaces. */
jlink_tap_append_step(last_tms, 0);
}
-
+
byte_length = tap_length / 8;
-
- usb_out_buffer[0] = JLINK_TAP_SEQUENCE_COMMAND;
- usb_out_buffer[1] = (tap_length >> 0) & 0xff;
- usb_out_buffer[2] = (tap_length >> 8) & 0xff;
-
- tms_offset = 3;
+
+ 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;
+
+ tms_offset = 4;
for (i = 0; i < byte_length; i++)
{
usb_out_buffer[tms_offset + i] = tms_buffer[i];
}
-
+
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, 3 + 2 * byte_length, byte_length);
-
+
+ result = jlink_usb_message(jlink_jtag_handle, 4 + 2 * byte_length, 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];
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);
-
+
DEBUG_JTAG_IO("pending scan result, length = %d", length);
-
+
#ifdef _DEBUG_USB_COMMS_
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);
LOG_ERROR("jlink_tap_execute, wrong result %d, expected %d", result, byte_length);
return ERROR_JTAG_QUEUE_FAILED;
}
-
+
jlink_tap_init();
}
-
+
return ERROR_OK;
}
struct usb_bus *busses;
struct usb_bus *bus;
struct usb_device *dev;
-
+
jlink_jtag_t *result;
-
+
result = (jlink_jtag_t*) malloc(sizeof(jlink_jtag_t));
-
+
usb_init();
usb_find_busses();
usb_find_devices();
-
+
busses = usb_get_busses();
-
+
/* find jlink_jtag device in usb bus */
-
+
for (bus = busses; bus; bus = bus->next)
{
for (dev = bus->devices; dev; dev = dev->next)
if ((dev->descriptor.idVendor == VID) && (dev->descriptor.idProduct == PID))
{
result->usb_handle = usb_open(dev);
-
+
/* usb_set_configuration required under win32 */
usb_set_configuration(result->usb_handle, dev->config[0].bConfigurationValue);
usb_claim_interface(result->usb_handle, 0);
+
+#if 0
+ /*
+ * This makes problems under Mac OS X. And is not needed
+ * under Windows. Hopefully this will not break a linux build
+ */
usb_set_altinterface(result->usb_handle, 0);
+#endif
return result;
}
}
}
-
+
free(result);
return NULL;
}
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)
{
result = jlink_usb_read(jlink_jtag);
- if (result == in_length)
+ if (result == in_length || result == in_length+1)
{
- return result;
+ 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
{
int jlink_usb_write(jlink_jtag_t *jlink_jtag, int out_length)
{
int result;
-
+
if (out_length > JLINK_OUT_BUFFER_SIZE)
{
LOG_ERROR("jlink_jtag_write illegal out_length=%d (max=%d)", out_length, JLINK_OUT_BUFFER_SIZE);
return -1;
}
-
+
result = usb_bulk_write(jlink_jtag->usb_handle, JLINK_WRITE_ENDPOINT, \
usb_out_buffer, out_length, JLINK_USB_TIMEOUT);
-
+
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
usb_in_buffer, JLINK_IN_BUFFER_SIZE, JLINK_USB_TIMEOUT);
DEBUG_JTAG_IO("jlink_usb_read, result = %d", result);
-
+
#ifdef _DEBUG_USB_COMMS_
jlink_debug_buffer(usb_in_buffer, result);
#endif
return result;
}
+/* Read the result from the previous EMU cmd into result_buffer. */
+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);
+
+ DEBUG_JTAG_IO("jlink_usb_read_result, result = %d", result);
+
+#ifdef _DEBUG_USB_COMMS_
+ jlink_debug_buffer(usb_emu_result_buffer, result);
+#endif
+ return result;
+}
+
#ifdef _DEBUG_USB_COMMS_
#define BYTES_PER_LINE 16
char s[4];
int i;
int j;
-
+
for (i = 0; i < length; i += BYTES_PER_LINE)
{
snprintf(line, 5, "%04x", i);
projects / fw / openocd / blobdiff