interesting
/
riscv-openocd
mirror of https://github.com/riscv/riscv-openocd.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

zy1000: add jtag_add_tms_seq support 

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
This commit is contained in:
Øyvind Harboe 2010-03-01 08:25:57 +01:00
parent 761d4555b8
commit afbf927663
1 changed files with 41 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

61
src/jtag/zy1000/zy1000.c
View File

@ -1,5 +1,5 @@
/***************************************************************************
* Copyright (C) 2007-2009 by Øyvind Harboe *
* Copyright (C) 2007-2010 by Øyvind Harboe *
* *
* 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 *
@ -763,18 +763,52 @@ int interface_jtag_add_sleep(uint32_t us)
return ERROR_OK;
}
int interface_add_tms_seq(unsigned num_bits, const uint8_t *seq, enum tap_state state)
{
/*wait for the fifo to be empty*/
waitIdle();
for (unsigned i = 0; i < num_bits; i++)
{
int tms;
if (((seq[i/8] >> (i % 8)) & 1) == 0)
{
tms = 0;
}
else
{
tms = 1;
}
waitIdle();
ZY1000_POKE(ZY1000_JTAG_BASE + 0x28, tms);
}
waitIdle();
if (state != TAP_INVALID)
{
ZY1000_POKE(ZY1000_JTAG_BASE + 0x20, state);
} else
{
/* this would be normal if we are switching to SWD mode */
}
return ERROR_OK;
}
int interface_jtag_add_pathmove(int num_states, const tap_state_t *path)
{
int state_count;
int tms = 0;
/*wait for the fifo to be empty*/
waitIdle();
state_count = 0;
tap_state_t cur_state = cmd_queue_cur_state;
uint8_t seq[16];
memset(seq, 0, sizeof(seq));
assert(num_states < (sizeof(seq) * 8));
while (num_states)
{
if (tap_state_transition(cur_state, false) == path[state_count])
@ -791,28 +825,14 @@ int interface_jtag_add_pathmove(int num_states, const tap_state_t *path)
exit(-1);
}
waitIdle();
ZY1000_POKE(ZY1000_JTAG_BASE + 0x28, tms);
seq[state_count/8] = seq[state_count/8] | (tms << (state_count % 8));
cur_state = path[state_count];
state_count++;
num_states--;
}
waitIdle();
ZY1000_POKE(ZY1000_JTAG_BASE + 0x20, cur_state);
return ERROR_OK;
}
int interface_add_tms_seq(unsigned num_bits, const uint8_t *seq)
{
/* FIXME just implement this, like pathmove but without
* JTAG-specific state transition checking. Then update
* zy1000_interface to report that it's supported.
*
* Eventually interface_jtag_add_pathmove() could vanish.
*/
return ERROR_JTAG_NOT_IMPLEMENTED;
return interface_add_tms_seq(state_count, seq, cur_state);
}
void embeddedice_write_dcc(struct jtag_tap *tap, int reg_addr, uint8_t *buffer, int little, int count)
@ -963,6 +983,7 @@ static const struct command_registration zy1000_commands[] = {
struct jtag_interface zy1000_interface =
{
.name = "ZY1000",
.supported = DEBUG_CAP_TMS_SEQ,
.execute_queue = NULL,
.speed = zy1000_speed,
.commands = zy1000_commands,