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// SPDX-License-Identifier: GPL-2.0-or-later
/***************************************************************************
* Copyright (C) 2010 by Oleksandr Tymoshenko <gonzo@bluezbox.com> *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "target.h"
#include "jtag/jtag.h"
#include "avr32_jtag.h"
static int avr32_jtag_set_instr(struct avr32_jtag *jtag_info, int new_instr)
{
struct jtag_tap *tap;
int busy = 0;
tap = jtag_info->tap;
if (!tap)
return ERROR_FAIL;
if (buf_get_u32(tap->cur_instr, 0, tap->ir_length) != (uint32_t)new_instr) {
do {
struct scan_field field;
uint8_t t[4] = { 0 };
uint8_t ret[4];
field.num_bits = tap->ir_length;
field.out_value = t;
buf_set_u32(t, 0, field.num_bits, new_instr);
field.in_value = ret;
jtag_add_ir_scan(tap, &field, TAP_IDLE);
if (jtag_execute_queue() != ERROR_OK) {
LOG_ERROR("%s: setting address failed", __func__);
return ERROR_FAIL;
}
busy = buf_get_u32(ret, 2, 1);
} while (busy); /* check for busy bit */
}
return ERROR_OK;
}
static int avr32_jtag_nexus_set_address(struct avr32_jtag *jtag_info,
uint32_t addr, int mode)
{
struct scan_field fields[2];
uint8_t addr_buf[4];
uint8_t busy_buf[4];
int busy;
memset(fields, 0, sizeof(fields));
do {
memset(addr_buf, 0, sizeof(addr_buf));
memset(busy_buf, 0, sizeof(busy_buf));
buf_set_u32(addr_buf, 0, 1, mode);
buf_set_u32(addr_buf, 1, 7, addr);
fields[0].num_bits = 26;
fields[0].in_value = NULL;
fields[0].out_value = NULL;
fields[1].num_bits = 8;
fields[1].in_value = busy_buf;
fields[1].out_value = addr_buf;
jtag_add_dr_scan(jtag_info->tap, 2, fields, TAP_IDLE);
if (jtag_execute_queue() != ERROR_OK) {
LOG_ERROR("%s: setting address failed", __func__);
return ERROR_FAIL;
}
busy = buf_get_u32(busy_buf, 6, 1);
} while (busy);
return ERROR_OK;
}
static int avr32_jtag_nexus_read_data(struct avr32_jtag *jtag_info,
uint32_t *pdata)
{
struct scan_field fields[2];
uint8_t data_buf[4];
uint8_t busy_buf[4];
int busy;
do {
memset(data_buf, 0, sizeof(data_buf));
memset(busy_buf, 0, sizeof(busy_buf));
fields[0].num_bits = 32;
fields[0].out_value = NULL;
fields[0].in_value = data_buf;
fields[1].num_bits = 2;
fields[1].in_value = busy_buf;
fields[1].out_value = NULL;
jtag_add_dr_scan(jtag_info->tap, 2, fields, TAP_IDLE);
if (jtag_execute_queue() != ERROR_OK) {
LOG_ERROR("%s: reading data failed", __func__);
return ERROR_FAIL;
}
busy = buf_get_u32(busy_buf, 0, 1);
} while (busy);
*pdata = buf_get_u32(data_buf, 0, 32);
return ERROR_OK;
}
static int avr32_jtag_nexus_write_data(struct avr32_jtag *jtag_info,
uint32_t data)
{
struct scan_field fields[2];
uint8_t data_buf[4];
uint8_t busy_buf[4];
uint8_t dummy_buf[4];
int busy;
do {
memset(data_buf, 0, sizeof(data_buf));
memset(busy_buf, 0, sizeof(busy_buf));
memset(dummy_buf, 0, sizeof(dummy_buf));
fields[0].num_bits = 2;
fields[0].in_value = busy_buf;
fields[0].out_value = dummy_buf;
buf_set_u32(data_buf, 0, 32, data);
fields[1].num_bits = 32;
fields[1].in_value = NULL;
fields[1].out_value = data_buf;
jtag_add_dr_scan(jtag_info->tap, 2, fields, TAP_IDLE);
if (jtag_execute_queue() != ERROR_OK) {
LOG_ERROR("%s: reading data failed", __func__);
return ERROR_FAIL;
}
busy = buf_get_u32(busy_buf, 0, 0);
} while (busy);
return ERROR_OK;
}
int avr32_jtag_nexus_read(struct avr32_jtag *jtag_info,
uint32_t addr, uint32_t *value)
{
avr32_jtag_set_instr(jtag_info, AVR32_INST_NEXUS_ACCESS);
avr32_jtag_nexus_set_address(jtag_info, addr, MODE_READ);
return avr32_jtag_nexus_read_data(jtag_info, value);
}
int avr32_jtag_nexus_write(struct avr32_jtag *jtag_info,
uint32_t addr, uint32_t value)
{
avr32_jtag_set_instr(jtag_info, AVR32_INST_NEXUS_ACCESS);
avr32_jtag_nexus_set_address(jtag_info, addr, MODE_WRITE);
return avr32_jtag_nexus_write_data(jtag_info, value);
}
static int avr32_jtag_mwa_set_address(struct avr32_jtag *jtag_info, int slave,
uint32_t addr, int mode)
{
struct scan_field fields[2];
uint8_t addr_buf[4];
uint8_t slave_buf[4];
uint8_t busy_buf[4];
int busy;
memset(fields, 0, sizeof(fields));
do {
memset(addr_buf, 0, sizeof(addr_buf));
memset(busy_buf, 0, sizeof(busy_buf));
memset(slave_buf, 0, sizeof(slave_buf));
buf_set_u32(slave_buf, 0, 4, slave);
buf_set_u32(addr_buf, 0, 1, mode);
buf_set_u32(addr_buf, 1, 30, addr >> 2);
fields[0].num_bits = 31;
fields[0].in_value = NULL;
fields[0].out_value = addr_buf;
fields[1].num_bits = 4;
fields[1].in_value = busy_buf;
fields[1].out_value = slave_buf;
jtag_add_dr_scan(jtag_info->tap, 2, fields, TAP_IDLE);
if (jtag_execute_queue() != ERROR_OK) {
LOG_ERROR("%s: setting address failed", __func__);
return ERROR_FAIL;
}
busy = buf_get_u32(busy_buf, 1, 1);
} while (busy);
return ERROR_OK;
}
static int avr32_jtag_mwa_read_data(struct avr32_jtag *jtag_info,
uint32_t *pdata)
{
struct scan_field fields[2];
uint8_t data_buf[4];
uint8_t busy_buf[4];
int busy;
do {
memset(data_buf, 0, sizeof(data_buf));
memset(busy_buf, 0, sizeof(busy_buf));
fields[0].num_bits = 32;
fields[0].out_value = NULL;
fields[0].in_value = data_buf;
fields[1].num_bits = 3;
fields[1].in_value = busy_buf;
fields[1].out_value = NULL;
jtag_add_dr_scan(jtag_info->tap, 2, fields, TAP_IDLE);
if (jtag_execute_queue() != ERROR_OK) {
LOG_ERROR("%s: reading data failed", __func__);
return ERROR_FAIL;
}
busy = buf_get_u32(busy_buf, 0, 1);
} while (busy);
*pdata = buf_get_u32(data_buf, 0, 32);
return ERROR_OK;
}
static int avr32_jtag_mwa_write_data(struct avr32_jtag *jtag_info,
uint32_t data)
{
struct scan_field fields[2];
uint8_t data_buf[4];
uint8_t busy_buf[4];
uint8_t zero_buf[4];
int busy;
do {
memset(data_buf, 0, sizeof(data_buf));
memset(busy_buf, 0, sizeof(busy_buf));
memset(zero_buf, 0, sizeof(zero_buf));
buf_set_u32(data_buf, 0, 32, data);
fields[0].num_bits = 3;
fields[0].in_value = busy_buf;
fields[0].out_value = zero_buf;
fields[1].num_bits = 32;
fields[1].out_value = data_buf;
fields[1].in_value = NULL;
jtag_add_dr_scan(jtag_info->tap, 2, fields, TAP_IDLE);
if (jtag_execute_queue() != ERROR_OK) {
LOG_ERROR("%s: reading data failed", __func__);
return ERROR_FAIL;
}
busy = buf_get_u32(busy_buf, 0, 1);
} while (busy);
return ERROR_OK;
}
int avr32_jtag_mwa_read(struct avr32_jtag *jtag_info, int slave,
uint32_t addr, uint32_t *value)
{
avr32_jtag_set_instr(jtag_info, AVR32_INST_MW_ACCESS);
avr32_jtag_mwa_set_address(jtag_info, slave, addr, MODE_READ);
avr32_jtag_mwa_read_data(jtag_info, value);
return ERROR_OK;
}
int avr32_jtag_mwa_write(struct avr32_jtag *jtag_info, int slave,
uint32_t addr, uint32_t value)
{
avr32_jtag_set_instr(jtag_info, AVR32_INST_MW_ACCESS);
avr32_jtag_mwa_set_address(jtag_info, slave, addr, MODE_WRITE);
avr32_jtag_mwa_write_data(jtag_info, value);
return ERROR_OK;
}
int avr32_jtag_exec(struct avr32_jtag *jtag_info, uint32_t inst)
{
int retval;
uint32_t ds;
retval = avr32_jtag_nexus_write(jtag_info, AVR32_OCDREG_DINST, inst);
if (retval != ERROR_OK)
return retval;
do {
retval = avr32_jtag_nexus_read(jtag_info, AVR32_OCDREG_DS, &ds);
if (retval != ERROR_OK)
return retval;
} while ((ds & OCDREG_DS_DBA) && !(ds & OCDREG_DS_INC));
return ERROR_OK;
}
int avr32_ocd_setbits(struct avr32_jtag *jtag, int reg, uint32_t bits)
{
uint32_t value;
int res;
res = avr32_jtag_nexus_read(jtag, reg, &value);
if (res)
return res;
value |= bits;
res = avr32_jtag_nexus_write(jtag, reg, value);
if (res)
return res;
return ERROR_OK;
}
int avr32_ocd_clearbits(struct avr32_jtag *jtag, int reg, uint32_t bits)
{
uint32_t value;
int res;
res = avr32_jtag_nexus_read(jtag, reg, &value);
if (res)
return res;
value &= ~bits;
res = avr32_jtag_nexus_write(jtag, reg, value);
if (res)
return res;
return ERROR_OK;
}
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