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riscv-openocd/src/target/dsp563xx_once.c

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// SPDX-License-Identifier: GPL-2.0-or-later
/***************************************************************************
* Copyright (C) 2009 by Mathias Kuester *
* mkdorg@users.sourceforge.net *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <jim.h>
#include "target.h"
#include "target_type.h"
#include "register.h"
#include "dsp563xx.h"
#include "dsp563xx_once.h"
#define JTAG_STATUS_STATIC_MASK 0x03
#define JTAG_STATUS_STATIC_VALUE 0x01
#define JTAG_STATUS_NORMAL 0x01
#define JTAG_STATUS_STOPWAIT 0x05
#define JTAG_STATUS_BUSY 0x09
#define JTAG_STATUS_DEBUG 0x0d
#define JTAG_INSTR_EXTEST 0x00
#define JTAG_INSTR_SAMPLE_PRELOAD 0x01
#define JTAG_INSTR_IDCODE 0x02
#define JTAG_INSTR_HIZ 0x04
#define JTAG_INSTR_CLAMP 0x05
#define JTAG_INSTR_ENABLE_ONCE 0x06
#define JTAG_INSTR_DEBUG_REQUEST 0x07
#define JTAG_INSTR_BYPASS 0x0F
/** */
static inline int dsp563xx_write_dr(struct jtag_tap *tap, uint8_t *dr_in, uint8_t *dr_out, int dr_len, int rti)
{
jtag_add_plain_dr_scan(dr_len, dr_out, dr_in, TAP_IDLE);
return ERROR_OK;
}
/** */
static inline int dsp563xx_write_dr_u8(struct jtag_tap *tap, uint8_t *dr_in, uint8_t dr_out, int dr_len, int rti)
{
return dsp563xx_write_dr(tap, dr_in, &dr_out, dr_len, rti);
}
/** */
static inline int dsp563xx_write_dr_u32(struct jtag_tap *tap, uint32_t *dr_in, uint32_t dr_out, int dr_len, int rti)
{
return dsp563xx_write_dr(tap, (uint8_t *) dr_in, (uint8_t *) &dr_out, dr_len, rti);
}
/** single word instruction */
static inline int dsp563xx_once_ir_exec(struct jtag_tap *tap, int flush, uint8_t instr,
uint8_t rw, uint8_t go, uint8_t ex)
{
int err;
err = dsp563xx_write_dr_u8(tap, NULL, instr | (ex << 5) | (go << 6) | (rw << 7), 8, 0);
if (err != ERROR_OK)
return err;
if (flush)
err = jtag_execute_queue();
return err;
}
/* IR and DR functions */
static inline int dsp563xx_write_ir(struct jtag_tap *tap, uint8_t *ir_in, uint8_t *ir_out, int ir_len, int rti)
{
jtag_add_plain_ir_scan(tap->ir_length, ir_out, ir_in, TAP_IDLE);
return ERROR_OK;
}
static inline int dsp563xx_write_ir_u8(struct jtag_tap *tap, uint8_t *ir_in, uint8_t ir_out, int ir_len, int rti)
{
return dsp563xx_write_ir(tap, ir_in, &ir_out, ir_len, rti);
}
static inline int dsp563xx_jtag_sendinstr(struct jtag_tap *tap, uint8_t *ir_in, uint8_t ir_out)
{
return dsp563xx_write_ir_u8(tap, ir_in, ir_out, tap->ir_length, 1);
}
/** */
int dsp563xx_once_target_status(struct jtag_tap *tap)
{
int err;
uint8_t jtag_status;
err = dsp563xx_jtag_sendinstr(tap, &jtag_status, JTAG_INSTR_ENABLE_ONCE);
if (err != ERROR_OK)
return TARGET_UNKNOWN;
err = jtag_execute_queue();
if (err != ERROR_OK)
return TARGET_UNKNOWN;
/* verify correct static status pattern */
if ((jtag_status & JTAG_STATUS_STATIC_MASK) != JTAG_STATUS_STATIC_VALUE)
return TARGET_UNKNOWN;
if (jtag_status != JTAG_STATUS_DEBUG)
return TARGET_RUNNING;
return TARGET_HALTED;
}
/** */
int dsp563xx_once_request_debug(struct jtag_tap *tap, int reset_state)
{
int err;
uint8_t ir_in = 0, pattern = 0;
uint32_t retry = 0;
/* in reset state we only get a ACK
* from the interface */
if (reset_state)
pattern = 1;
else
pattern = JTAG_STATUS_DEBUG;
/* wait until we get the ack */
while (ir_in != pattern) {
err = dsp563xx_jtag_sendinstr(tap, &ir_in, JTAG_INSTR_DEBUG_REQUEST);
if (err != ERROR_OK)
return err;
err = jtag_execute_queue();
if (err != ERROR_OK)
return err;
LOG_DEBUG("debug request: %02X", ir_in);
if (retry++ == 100)
return ERROR_TARGET_FAILURE;
}
/* we cant enable the once in reset state */
if (pattern == 1)
return ERROR_OK;
/* try to enable once */
retry = 0;
ir_in = 0;
while (ir_in != pattern) {
err = dsp563xx_jtag_sendinstr(tap, &ir_in, JTAG_INSTR_ENABLE_ONCE);
if (err != ERROR_OK)
return err;
err = jtag_execute_queue();
if (err != ERROR_OK)
return err;
LOG_DEBUG("enable once: %02X", ir_in);
if (retry++ == 100) {
LOG_DEBUG("error");
return ERROR_TARGET_FAILURE;
}
}
if (ir_in != JTAG_STATUS_DEBUG)
return ERROR_TARGET_FAILURE;
return ERROR_OK;
}
/** once read registers */
int dsp563xx_once_read_register(struct jtag_tap *tap, int flush, struct once_reg *regs, int len)
{
int i;
int err = ERROR_OK;
for (i = 0; i < len; i++) {
err = dsp563xx_once_reg_read_ex(tap, flush, regs[i].addr, regs[i].len, &regs[i].reg);
if (err != ERROR_OK)
return err;
}
if (flush)
err = jtag_execute_queue();
return err;
}
/** once read register with register len */
int dsp563xx_once_reg_read_ex(struct jtag_tap *tap, int flush, uint8_t reg, uint8_t len, uint32_t *data)
{
int err;
err = dsp563xx_once_ir_exec(tap, 1, reg, 1, 0, 0);
if (err != ERROR_OK)
return err;
err = dsp563xx_write_dr_u32(tap, data, 0x00, len, 0);
if (err != ERROR_OK)
return err;
if (flush)
err = jtag_execute_queue();
return err;
}
/** once read register */
int dsp563xx_once_reg_read(struct jtag_tap *tap, int flush, uint8_t reg, uint32_t *data)
{
int err;
err = dsp563xx_once_ir_exec(tap, flush, reg, 1, 0, 0);
if (err != ERROR_OK)
return err;
err = dsp563xx_write_dr_u32(tap, data, 0x00, 24, 0);
if (err != ERROR_OK)
return err;
if (flush)
err = jtag_execute_queue();
return err;
}
/** once write register */
int dsp563xx_once_reg_write(struct jtag_tap *tap, int flush, uint8_t reg, uint32_t data)
{
int err;
err = dsp563xx_once_ir_exec(tap, flush, reg, 0, 0, 0);
if (err != ERROR_OK)
return err;
err = dsp563xx_write_dr_u32(tap, NULL, data, 24, 0);
if (err != ERROR_OK)
return err;
if (flush)
err = jtag_execute_queue();
return err;
}
/** single word instruction */
int dsp563xx_once_execute_sw_ir(struct jtag_tap *tap, int flush, uint32_t opcode)
{
int err;
err = dsp563xx_once_ir_exec(tap, flush, DSP563XX_ONCE_OPDBR, 0, 1, 0);
if (err != ERROR_OK)
return err;
err = dsp563xx_write_dr_u32(tap, NULL, opcode, 24, 0);
if (err != ERROR_OK)
return err;
if (flush)
err = jtag_execute_queue();
return err;
}
/** double word instruction */
int dsp563xx_once_execute_dw_ir(struct jtag_tap *tap, int flush, uint32_t opcode, uint32_t operand)
{
int err;
err = dsp563xx_once_ir_exec(tap, flush, DSP563XX_ONCE_OPDBR, 0, 0, 0);
if (err != ERROR_OK)
return err;
err = dsp563xx_write_dr_u32(tap, NULL, opcode, 24, 0);
if (err != ERROR_OK)
return err;
if (flush) {
err = jtag_execute_queue();
if (err != ERROR_OK)
return err;
}
err = dsp563xx_once_ir_exec(tap, flush, DSP563XX_ONCE_OPDBR, 0, 1, 0);
if (err != ERROR_OK)
return err;
err = dsp563xx_write_dr_u32(tap, NULL, operand, 24, 0);
if (err != ERROR_OK)
return err;
if (flush) {
err = jtag_execute_queue();
if (err != ERROR_OK)
return err;
}
return ERROR_OK;
}
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