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jtag3.c
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jtag3.c
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/*
* avrdude - A Downloader/Uploader for AVR device programmers
* Copyright (C) 2012 Joerg Wunsch <j@uriah.heep.sax.de>
*
*
* 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
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* $Id$ */
/*
* avrdude interface for Atmel JTAGICE3 programmer
*/
#include "ac_cfg.h"
#include <ctype.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <errno.h>
#include <unistd.h>
#include <sys/time.h>
#include <time.h>
#include "avrdude.h"
#include "libavrdude.h"
#include "crc16.h"
#include "jtag3.h"
#include "jtag3_private.h"
#include "usbdevs.h"
/*
* Private data for this programmer.
*/
struct pdata
{
unsigned short command_sequence; /* Next cmd seqno to issue. */
/*
* See jtag3_read_byte() for an explanation of the flash and
* EEPROM page caches.
*/
unsigned char *flash_pagecache;
unsigned long flash_pageaddr;
unsigned int flash_pagesize;
unsigned char *eeprom_pagecache;
unsigned long eeprom_pageaddr;
unsigned int eeprom_pagesize;
int prog_enabled; /* Cached value of PROGRAMMING status. */
/* JTAG chain stuff */
unsigned char jtagchain[4];
/* Start address of Xmega boot area */
unsigned long boot_start;
/* Flag for triggering HV UPDI */
bool use_hvupdi;
/* Function to set the appropriate clock parameter */
int (*set_sck)(const PROGRAMMER *, unsigned char *);
};
#define PDATA(pgm) ((struct pdata *)(pgm->cookie))
/*
* pgm->flag is marked as "for private use of the programmer".
* The following defines this programmer's use of that field.
*/
#define PGM_FL_IS_DW (0x0001)
#define PGM_FL_IS_PDI (0x0002)
#define PGM_FL_IS_JTAG (0x0004)
#define PGM_FL_IS_EDBG (0x0008)
#define PGM_FL_IS_UPDI (0x0010)
static int jtag3_open(PROGRAMMER *pgm, const char *port);
static int jtag3_edbg_prepare(const PROGRAMMER *pgm);
static int jtag3_edbg_signoff(const PROGRAMMER *pgm);
static int jtag3_edbg_send(const PROGRAMMER *pgm, unsigned char *data, size_t len);
static int jtag3_edbg_recv_frame(const PROGRAMMER *pgm, unsigned char **msg);
static int jtag3_initialize(const PROGRAMMER *pgm, const AVRPART *p);
static int jtag3_chip_erase(const PROGRAMMER *pgm, const AVRPART *p);
static int jtag3_read_byte(const PROGRAMMER *pgm, const AVRPART *p, const AVRMEM *mem,
unsigned long addr, unsigned char * value);
static int jtag3_write_byte(const PROGRAMMER *pgm, const AVRPART *p, const AVRMEM *mem,
unsigned long addr, unsigned char data);
static int jtag3_set_sck_period(const PROGRAMMER *pgm, double v);
void jtag3_print_parms1(const PROGRAMMER *pgm, const char *p, FILE *fp);
static int jtag3_paged_write(const PROGRAMMER *pgm, const AVRPART *p, const AVRMEM *m,
unsigned int page_size,
unsigned int addr, unsigned int n_bytes);
static unsigned char jtag3_memtype(const PROGRAMMER *pgm, const AVRPART *p, unsigned long addr);
static unsigned int jtag3_memaddr(const PROGRAMMER *pgm, const AVRPART *p, const AVRMEM *m, unsigned long addr);
void jtag3_setup(PROGRAMMER * pgm)
{
if ((pgm->cookie = malloc(sizeof(struct pdata))) == 0) {
pmsg_error("out of memory allocating private data\n");
exit(1);
}
memset(pgm->cookie, 0, sizeof(struct pdata));
}
void jtag3_teardown(PROGRAMMER * pgm)
{
free(pgm->cookie);
}
static unsigned long
b4_to_u32(unsigned char *b)
{
unsigned long l;
l = b[0];
l += (unsigned)b[1] << 8;
l += (unsigned)b[2] << 16;
l += (unsigned)b[3] << 24;
return l;
}
static void
u32_to_b4(unsigned char *b, unsigned long l)
{
b[0] = l & 0xff;
b[1] = (l >> 8) & 0xff;
b[2] = (l >> 16) & 0xff;
b[3] = (l >> 24) & 0xff;
}
static unsigned short
b2_to_u16(unsigned char *b)
{
unsigned short l;
l = b[0];
l += (unsigned)b[1] << 8;
return l;
}
static void
u16_to_b2(unsigned char *b, unsigned short l)
{
b[0] = l & 0xff;
b[1] = (l >> 8) & 0xff;
}
static bool matches(const char *s, const char *pat)
{
return strncmp(s, pat, strlen(pat)) == 0;
}
static void jtag3_print_data(unsigned char *b, size_t s)
{
int i;
if (s < 2)
return;
for (i = 0; i < s; i++) {
msg_info("0x%02x", b[i]);
if (i % 16 == 15)
msg_info("\n");
else
msg_info(" ");
}
if (i % 16 != 0)
msg_info("\n");
}
static void jtag3_prmsg(const PROGRAMMER *pgm, unsigned char *data, size_t len) {
int i;
if (verbose >= 4) {
msg_trace("Raw message:\n");
for (i = 0; i < len; i++) {
msg_trace("%02x ", data[i]);
if (i % 16 == 15)
msg_trace("\n");
else
msg_trace(" ");
}
if (i % 16 != 0)
msg_trace("\n");
}
switch (data[0]) {
case SCOPE_INFO:
msg_info("[info] ");
break;
case SCOPE_GENERAL:
msg_info("[general] ");
break;
case SCOPE_AVR_ISP:
msg_info("[AVRISP] ");
jtag3_print_data(data + 1, len - 1);
return;
case SCOPE_AVR:
msg_info("[AVR] ");
break;
default:
msg_info("[scope 0x%02x] ", data[0]);
break;
}
switch (data[1]) {
case RSP3_OK:
msg_info("OK\n");
break;
case RSP3_FAILED:
msg_info("FAILED");
if (len > 3)
{
char reason[50];
sprintf(reason, "0x%02x", data[3]);
switch (data[3])
{
case RSP3_FAIL_NO_ANSWER:
strcpy(reason, "target does not answer");
break;
case RSP3_FAIL_NO_TARGET_POWER:
strcpy(reason, "no target power");
break;
case RSP3_FAIL_NOT_UNDERSTOOD:
strcpy(reason, "command not understood");
break;
case RSP3_FAIL_WRONG_MODE:
strcpy(reason, "wrong (programming) mode");
break;
case RSP3_FAIL_PDI:
strcpy(reason, "PDI failure");
break;
case RSP3_FAIL_UNSUPP_MEMORY:
strcpy(reason, "unsupported memory type");
break;
case RSP3_FAIL_WRONG_LENGTH:
strcpy(reason, "wrong length in memory access");
break;
case RSP3_FAIL_DEBUGWIRE:
strcpy(reason, "debugWIRE communication failed");
break;
}
msg_info(", reason: %s\n", reason);
}
else
{
msg_info(", unspecified reason\n");
}
break;
case RSP3_DATA:
msg_info("Data returned:\n");
jtag3_print_data(data + 2, len - 2);
break;
case RSP3_INFO:
msg_info("Info returned:\n");
for (i = 2; i < len; i++) {
if (isprint(data[i]))
msg_info("%c", data[i]);
else
msg_info("\\%03o", data[i]);
}
msg_info("\n");
break;
case RSP3_PC:
if (len < 7)
{
msg_info("PC reply too short\n");
}
else
{
unsigned long pc = (data[6] << 24) | (data[5] << 16)
| (data[4] << 8) | data[3];
msg_info("PC 0x%0lx\n", pc);
}
break;
default:
msg_info("unknown message 0x%02x\n", data[1]);
}
}
static int jtag3_errcode(int reason)
{
if (reason == RSP3_FAIL_OCD_LOCKED ||
reason == RSP3_FAIL_CRC_FAILURE)
return LIBAVRDUDE_SOFTFAIL;
return LIBAVRDUDE_GENERAL_FAILURE;
}
static void jtag3_prevent(const PROGRAMMER *pgm, unsigned char *data, size_t len) {
int i;
if (verbose >= 4) {
msg_trace("Raw event:\n");
for (i = 0; i < len; i++) {
msg_trace("%02x ", data[i]);
if (i % 16 == 15)
msg_trace("\n");
else
msg_trace(" ");
}
if (i % 16 != 0)
msg_trace("\n");
}
msg_info("Event serial 0x%04x, ", (data[3] << 8) | data[2]);
switch (data[4]) {
case SCOPE_INFO:
msg_info("[info] ");
break;
case SCOPE_GENERAL:
msg_info("[general] ");
break;
case SCOPE_AVR:
msg_info("[AVR] ");
break;
default:
msg_info("[scope 0x%02x] ", data[0]);
break;
}
switch (data[5]) {
case EVT3_BREAK:
msg_info("BREAK");
if (len >= 11) {
msg_info(", PC = 0x%lx, reason ", b4_to_u32(data + 6));
switch (data[10]) {
case 0x00:
msg_info("unspecified");
break;
case 0x01:
msg_info("program break");
break;
case 0x02:
msg_info("data break PDSB");
break;
case 0x03:
msg_info("data break PDMSB");
break;
default:
msg_info("unknown: 0x%02x", data[10]);
}
/* There are two more bytes of data which always appear to be
* 0x01, 0x00. Purpose unknown. */
}
break;
case EVT3_SLEEP:
if (len >= 8 && data[7] == 0)
msg_info("sleeping");
else if (len >= 8 && data[7] == 1)
msg_info("wakeup");
else
msg_info("unknown SLEEP event");
break;
case EVT3_POWER:
if (len >= 8 && data[7] == 0)
msg_info("power-down");
else if (len >= 8 && data[7] == 1)
msg_info("power-up");
else
msg_info("unknown POWER event");
break;
default:
msg_info("UNKNOWN 0x%02x", data[5]);
break;
}
msg_info("\n");
}
int jtag3_send(const PROGRAMMER *pgm, unsigned char *data, size_t len) {
unsigned char *buf;
if (pgm->flag & PGM_FL_IS_EDBG)
return jtag3_edbg_send(pgm, data, len);
msg_debug("\n");
pmsg_debug("jtag3_send(): sending %lu bytes\n", (unsigned long) len);
if ((buf = malloc(len + 4)) == NULL)
{
pmsg_error("out of memory");
return -1;
}
buf[0] = TOKEN;
buf[1] = 0; /* dummy */
u16_to_b2(buf + 2, PDATA(pgm)->command_sequence);
memcpy(buf + 4, data, len);
if (serial_send(&pgm->fd, buf, len + 4) != 0) {
pmsg_error("unable to send command to serial port\n");
free(buf);
return -1;
}
free(buf);
return 0;
}
static int jtag3_edbg_send(const PROGRAMMER *pgm, unsigned char *data, size_t len) {
unsigned char buf[USBDEV_MAX_XFER_3];
unsigned char status[USBDEV_MAX_XFER_3];
int rv;
if (verbose >= 4)
{
memset(buf, 0, USBDEV_MAX_XFER_3);
memset(status, 0, USBDEV_MAX_XFER_3);
}
msg_debug("\n");
pmsg_debug("jtag3_edbg_send(): sending %lu bytes\n", (unsigned long) len);
/* 4 bytes overhead for CMD, fragment #, and length info */
int max_xfer = pgm->fd.usb.max_xfer;
int nfragments = (len + max_xfer - 1) / max_xfer;
if (nfragments > 1)
{
pmsg_debug("jtag3_edbg_send(): fragmenting into %d packets\n", nfragments);
}
int frag;
for (frag = 0; frag < nfragments; frag++)
{
int this_len;
/* All fragments have the (CMSIS-DAP layer) CMD, the fragment
* identifier, and the length field. */
buf[0] = EDBG_VENDOR_AVR_CMD;
buf[1] = ((frag + 1) << 4) | nfragments;
if (frag == 0)
{
/* Only first fragment has TOKEN and seq#, thus four bytes
* less payload than subsequent fragments. */
this_len = len < max_xfer - 8? len: max_xfer - 8;
buf[2] = (this_len + 4) >> 8;
buf[3] = (this_len + 4) & 0xff;
buf[4] = TOKEN;
buf[5] = 0; /* dummy */
u16_to_b2(buf + 6, PDATA(pgm)->command_sequence);
memcpy(buf + 8, data, this_len);
}
else
{
this_len = len < max_xfer - 4? len: max_xfer - 4;
buf[2] = (this_len) >> 8;
buf[3] = (this_len) & 0xff;
memcpy(buf + 4, data, this_len);
}
if (serial_send(&pgm->fd, buf, max_xfer) != 0) {
pmsg_notice("jtag3_edbg_send(): unable to send command to serial port\n");
return -1;
}
rv = serial_recv(&pgm->fd, status, max_xfer);
if (rv < 0) {
/* timeout in receive */
pmsg_notice2("jtag3_edbg_send(): timeout receiving packet\n");
return -1;
}
if (status[0] != EDBG_VENDOR_AVR_CMD ||
(frag == nfragments - 1 && status[1] != 0x01))
{
/* what to do in this case? */
pmsg_notice("jtag3_edbg_send(): unexpected response 0x%02x, 0x%02x\n", status[0], status[1]);
}
data += this_len;
len -= this_len;
}
return 0;
}
/*
* Send out all the CMSIS-DAP stuff needed to prepare the ICE.
*/
static int jtag3_edbg_prepare(const PROGRAMMER *pgm) {
unsigned char buf[USBDEV_MAX_XFER_3];
unsigned char status[USBDEV_MAX_XFER_3];
int rv;
msg_debug("\n");
pmsg_debug("jtag3_edbg_prepare()\n");
if (verbose >= 4)
memset(buf, 0, USBDEV_MAX_XFER_3);
buf[0] = CMSISDAP_CMD_CONNECT;
buf[1] = CMSISDAP_CONN_SWD;
if (serial_send(&pgm->fd, buf, pgm->fd.usb.max_xfer) != 0) {
pmsg_error("unable to send command to serial port\n");
return -1;
}
rv = serial_recv(&pgm->fd, status, pgm->fd.usb.max_xfer);
if (rv != pgm->fd.usb.max_xfer) {
pmsg_error("unable to read from serial port (%d)\n", rv);
return -1;
}
if (status[0] != CMSISDAP_CMD_CONNECT ||
status[1] == 0)
pmsg_error("unexpected response 0x%02x, 0x%02x\n", status[0], status[1]);
pmsg_notice2("jtag3_edbg_prepare(): connection status 0x%02x\n", status[1]);
buf[0] = CMSISDAP_CMD_LED;
buf[1] = CMSISDAP_LED_CONNECT;
buf[2] = 1;
if (serial_send(&pgm->fd, buf, pgm->fd.usb.max_xfer) != 0) {
pmsg_error("unable to send command to serial port\n");
return -1;
}
rv = serial_recv(&pgm->fd, status, pgm->fd.usb.max_xfer);
if (rv != pgm->fd.usb.max_xfer) {
pmsg_error("unable to read from serial port (%d)\n", rv);
return -1;
}
if (status[0] != CMSISDAP_CMD_LED ||
status[1] != 0)
pmsg_error("unexpected response 0x%02x, 0x%02x\n", status[0], status[1]);
return 0;
}
/*
* Send out all the CMSIS-DAP stuff when signing off.
*/
static int jtag3_edbg_signoff(const PROGRAMMER *pgm) {
unsigned char buf[USBDEV_MAX_XFER_3];
unsigned char status[USBDEV_MAX_XFER_3];
int rv;
msg_debug("\n");
pmsg_debug("jtag3_edbg_signoff()\n");
if (verbose >= 4)
memset(buf, 0, USBDEV_MAX_XFER_3);
buf[0] = CMSISDAP_CMD_LED;
buf[1] = CMSISDAP_LED_CONNECT;
buf[2] = 0;
if (serial_send(&pgm->fd, buf, pgm->fd.usb.max_xfer) != 0) {
pmsg_notice("jtag3_edbg_signoff(): unable to send command to serial port\n");
return -1;
}
rv = serial_recv(&pgm->fd, status, pgm->fd.usb.max_xfer);
if (rv != pgm->fd.usb.max_xfer) {
pmsg_notice("jtag3_edbg_signoff(): unable to read from serial port (%d)\n", rv);
return -1;
}
if (status[0] != CMSISDAP_CMD_LED ||
status[1] != 0)
pmsg_notice("jtag3_edbg_signoff(): unexpected response 0x%02x, 0x%02x\n", status[0], status[1]);
buf[0] = CMSISDAP_CMD_DISCONNECT;
if (serial_send(&pgm->fd, buf, pgm->fd.usb.max_xfer) != 0) {
pmsg_notice("jtag3_edbg_signoff(): unable to send command to serial port\n");
return -1;
}
rv = serial_recv(&pgm->fd, status, pgm->fd.usb.max_xfer);
if (rv != pgm->fd.usb.max_xfer) {
pmsg_notice("jtag3_edbg_signoff(): unable to read from serial port (%d)\n", rv);
return -1;
}
if (status[0] != CMSISDAP_CMD_DISCONNECT ||
status[1] != 0)
pmsg_notice("jtag3_edbg_signoff(): unexpected response 0x%02x, 0x%02x\n", status[0], status[1]);
return 0;
}
static int jtag3_drain(const PROGRAMMER *pgm, int display) {
return serial_drain(&pgm->fd, display);
}
/*
* Receive one frame, return it in *msg. Received sequence number is
* returned in seqno. Any valid frame will be returned, regardless
* whether it matches the expected sequence number, including event
* notification frames (seqno == 0xffff).
*
* Caller must eventually free the buffer.
*/
static int jtag3_recv_frame(const PROGRAMMER *pgm, unsigned char **msg) {
int rv;
unsigned char *buf = NULL;
if (pgm->flag & PGM_FL_IS_EDBG)
return jtag3_edbg_recv_frame(pgm, msg);
pmsg_trace("jtag3_recv():\n");
if ((buf = malloc(pgm->fd.usb.max_xfer)) == NULL) {
pmsg_error("out of memory\n");
return -1;
}
if (verbose >= 4)
memset(buf, 0, pgm->fd.usb.max_xfer);
rv = serial_recv(&pgm->fd, buf, pgm->fd.usb.max_xfer);
if (rv < 0) {
/* timeout in receive */
pmsg_notice2("jtag3_recv(): timeout receiving packet\n");
free(buf);
return -1;
}
*msg = buf;
return rv;
}
static int jtag3_edbg_recv_frame(const PROGRAMMER *pgm, unsigned char **msg) {
int rv, len = 0;
unsigned char *buf = NULL;
unsigned char *request;
pmsg_trace("jtag3_edbg_recv():\n");
if ((buf = malloc(USBDEV_MAX_XFER_3)) == NULL) {
pmsg_notice("jtag3_edbg_recv(): out of memory\n");
return -1;
}
if ((request = malloc(pgm->fd.usb.max_xfer)) == NULL) {
pmsg_notice("jtag3_edbg_recv(): out of memory\n");
free(buf);
return -1;
}
*msg = buf;
int nfrags = 0;
int thisfrag = 0;
do {
request[0] = EDBG_VENDOR_AVR_RSP;
if (serial_send(&pgm->fd, request, pgm->fd.usb.max_xfer) != 0) {
pmsg_notice("jtag3_edbg_recv(): unable to send CMSIS-DAP vendor command\n");
free(request);
free(*msg);
return -1;
}
rv = serial_recv(&pgm->fd, buf, pgm->fd.usb.max_xfer);
if (rv < 0) {
/* timeout in receive */
pmsg_notice2("jtag3_edbg_recv(): timeout receiving packet\n");
free(*msg);
free(request);
return -1;
}
if (buf[0] != EDBG_VENDOR_AVR_RSP) {
pmsg_notice("jtag3_edbg_recv(): unexpected response 0x%02x\n", buf[0]);
free(*msg);
free(request);
return -1;
}
if (buf[1] == 0) {
// Documentation says:
// "FragmentInfo 0x00 indicates that no response data is
// available, and the rest of the packet is ignored."
pmsg_notice("jtag3_edbg_recv(): no response available\n");
free(*msg);
free(request);
return -1;
}
/* calculate fragment information */
if (thisfrag == 0) {
/* first fragment */
nfrags = buf[1] & 0x0F;
thisfrag = 1;
} else {
if (nfrags != (buf[1] & 0x0F)) {
pmsg_notice("jtag3_edbg_recv(): "
"Inconsistent # of fragments; had %d, now %d\n",
nfrags, (buf[1] & 0x0F));
free(*msg);
free(request);
return -1;
}
}
if (thisfrag != ((buf[1] >> 4) & 0x0F)) {
pmsg_notice("jtag3_edbg_recv(): "
"inconsistent fragment number; expect %d, got %d\n",
thisfrag, ((buf[1] >> 4) & 0x0F));
free(*msg);
free(request);
return -1;
}
int thislen = (buf[2] << 8) | buf[3];
if (thislen > rv + 4) {
pmsg_notice("jtag3_edbg_recv(): unexpected length value (%d > %d)\n", thislen, rv + 4);
thislen = rv + 4;
}
if (len + thislen > USBDEV_MAX_XFER_3) {
pmsg_notice("jtag3_edbg_recv(): length exceeds max size (%d > %d)\n", len + thislen, USBDEV_MAX_XFER_3);
thislen = USBDEV_MAX_XFER_3 - len;
}
memmove(buf, buf + 4, thislen);
thisfrag++;
len += thislen;
buf += thislen;
} while (thisfrag <= nfrags);
free(request);
return len;
}
int jtag3_recv(const PROGRAMMER *pgm, unsigned char **msg) {
unsigned short r_seqno;
int rv;
for (;;) {
if ((rv = jtag3_recv_frame(pgm, msg)) <= 0)
return rv;
if ((rv & USB_RECV_FLAG_EVENT) != 0) {
if (verbose >= 3)
jtag3_prevent(pgm, *msg, rv & USB_RECV_LENGTH_MASK);
free(*msg);
continue;
}
rv &= USB_RECV_LENGTH_MASK;
r_seqno = ((*msg)[2] << 8) | (*msg)[1];
pmsg_debug("jtag3_recv(): "
"Got message seqno %d (command_sequence == %d)\n", r_seqno, PDATA(pgm)->command_sequence);
if (r_seqno == PDATA(pgm)->command_sequence) {
if (++(PDATA(pgm)->command_sequence) == 0xffff)
PDATA(pgm)->command_sequence = 0;
/*
* We move the payload to the beginning of the buffer, to make
* the job easier for the caller. We have to return the
* original pointer though, as the caller must free() it.
*/
rv -= 3;
memmove(*msg, *msg + 3, rv);
return rv;
}
pmsg_notice2("jtag3_recv(): "
"got wrong sequence number, %u != %u\n", r_seqno, PDATA(pgm)->command_sequence);
free(*msg);
}
}
int jtag3_command(const PROGRAMMER *pgm, unsigned char *cmd, unsigned int cmdlen,
unsigned char **resp, const char *descr)
{
int status;
unsigned char c;
pmsg_notice2("sending %s command: ", descr);
jtag3_send(pgm, cmd, cmdlen);
status = jtag3_recv(pgm, resp);
if (status <= 0) {
msg_notice2("\n");
pmsg_notice2("%s command: timeout/error communicating with programmer (status %d)\n", descr, status);
return LIBAVRDUDE_GENERAL_FAILURE;
} else if (verbose >= 3) {
msg_info("\n");
jtag3_prmsg(pgm, *resp, status);
} else {
msg_notice2("0x%02x (%d bytes msg)\n", (*resp)[1], status);
}
c = (*resp)[1] & RSP3_STATUS_MASK;
if (c != RSP3_OK) {
if ((c == RSP3_FAILED) && ((*resp)[3] == RSP3_FAIL_OCD_LOCKED ||
(*resp)[3] == RSP3_FAIL_CRC_FAILURE)) {
pmsg_error("device is locked; chip erase required to unlock\n");
} else {
pmsg_notice("bad response to %s command: 0x%02x\n", descr, c);
}
status = (*resp)[3];
free(*resp);
resp = 0;
return jtag3_errcode(status);
}
return status;
}
int jtag3_getsync(const PROGRAMMER *pgm, int mode) {
unsigned char buf[3], *resp;
pmsg_debug("jtag3_getsync()\n");
/* XplainedMini boards do not need this, and early revisions had a
* firmware bug where they complained about it. */
if ((pgm->flag & PGM_FL_IS_EDBG) &&
!matches(ldata(lfirst(pgm->id)), "xplainedmini")) {
if (jtag3_edbg_prepare(pgm) < 0) {
return -1;
}
}
/* Get the sign-on information. */
buf[0] = SCOPE_GENERAL;
buf[1] = CMD3_SIGN_ON;
buf[2] = 0;
if (jtag3_command(pgm, buf, 3, &resp, "sign-on") < 0)
return -1;
free(resp);
return 0;
}
/*
* issue the 'chip erase' command to the AVR device
*/
static int jtag3_chip_erase(const PROGRAMMER *pgm, const AVRPART *p) {
unsigned char buf[8], *resp;
buf[0] = SCOPE_AVR;
buf[1] = CMD3_ERASE_MEMORY;
buf[2] = 0;
buf[3] = XMEGA_ERASE_CHIP;
buf[4] = buf[5] = buf[6] = buf[7] = 0; /* page address */
if (jtag3_command(pgm, buf, 8, &resp, "chip erase") < 0)
return -1;
free(resp);
return 0;
}
/*
* UPDI 'unlock' -> 'enter progmode' with chip erase key
*/
static int jtag3_unlock_erase_key(const PROGRAMMER *pgm, const AVRPART *p) {
unsigned char buf[8], *resp;
buf[0] = 1; /* Enable */
if (jtag3_setparm(pgm, SCOPE_AVR, SET_GET_CTXT_OPTIONS, PARM3_OPT_CHIP_ERASE_TO_ENTER, buf, 1) < 0)
return -1;
buf[0] = SCOPE_AVR;
buf[1] = CMD3_ENTER_PROGMODE;
buf[2] = 0;
if (jtag3_command(pgm, buf, 3, &resp, "enter progmode") < 0)
return -1;
PDATA(pgm)->prog_enabled = 1;
buf[0] = 0; /* Disable */
if (jtag3_setparm(pgm, SCOPE_AVR, SET_GET_CTXT_OPTIONS, PARM3_OPT_CHIP_ERASE_TO_ENTER, buf, 1) < 0)
return -1;
free(resp);
return 0;
}
/*
* There is no chip erase functionality in debugWire mode.
*/
static int jtag3_chip_erase_dw(const PROGRAMMER *pgm, const AVRPART *p) {
pmsg_error("chip erase not supported in debugWire mode\n");
return 0;
}
static int jtag3_program_enable_dummy(const PROGRAMMER *pgm, const AVRPART *p) {
return 0;
}
static int jtag3_program_enable(const PROGRAMMER *pgm) {
unsigned char buf[3], *resp;
int status;
if (PDATA(pgm)->prog_enabled)
return 0;
buf[0] = SCOPE_AVR;
buf[1] = CMD3_ENTER_PROGMODE;
buf[2] = 0;
if ((status = jtag3_command(pgm, buf, 3, &resp, "enter progmode")) >= 0) {
free(resp);
PDATA(pgm)->prog_enabled = 1;
return LIBAVRDUDE_SUCCESS;
}
return status;
}
static int jtag3_program_disable(const PROGRAMMER *pgm) {
unsigned char buf[3], *resp;
if (!PDATA(pgm)->prog_enabled)
return 0;
buf[0] = SCOPE_AVR;
buf[1] = CMD3_LEAVE_PROGMODE;
buf[2] = 0;
if (jtag3_command(pgm, buf, 3, &resp, "leave progmode") < 0)
return -1;
free(resp);
PDATA(pgm)->prog_enabled = 0;
return 0;
}
static int jtag3_set_sck_xmega_pdi(const PROGRAMMER *pgm, unsigned char *clk) {
return jtag3_setparm(pgm, SCOPE_AVR, 1, PARM3_CLK_XMEGA_PDI, clk, 2);
}
static int jtag3_set_sck_xmega_jtag(const PROGRAMMER *pgm, unsigned char *clk) {
return jtag3_setparm(pgm, SCOPE_AVR, 1, PARM3_CLK_XMEGA_JTAG, clk, 2);
}
static int jtag3_set_sck_mega_jtag(const PROGRAMMER *pgm, unsigned char *clk) {
return jtag3_setparm(pgm, SCOPE_AVR, 1, PARM3_CLK_MEGA_PROG, clk, 2);
}
/*
* initialize the AVR device and prepare it to accept commands
*/
static int jtag3_initialize(const PROGRAMMER *pgm, const AVRPART *p) {
unsigned char conn = 0, parm[4];
const char *ifname;
unsigned char cmd[4], *resp;
int status;
/*
* At least, as of firmware 2.12, the JTAGICE3 doesn't handle
* splitting packets correctly. On a large transfer, the first
* split packets are correct, but remaining packets contain just
* garbage.
*
* We move the check here so in case future firmware versions fix