mspdebug/drivers/loadbsl.c

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/* MSPDebug - debugging tool for MSP430 MCUs
* Copyright (C) 2009-2013 Daniel Beer
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdlib.h>
#include <string.h>
#include "output.h"
#include "util.h"
#include "loadbsl.h"
#include "loadbsl_fw.h"
#include "bslhid.h"
#define BSL_MAX_CORE 62
#define BSL_MAX_BLOCK 52
#define BSL_CMD_RX_BLOCK 0x10
#define BSL_CMD_RX_BLOCK_FAST 0x1B
#define BSL_CMD_RX_PASSWORD 0x11
#define BSL_CMD_ERASE_SEGMENT 0x12
#define BSL_CMD_UNLOCK_LOCK_INFO 0x13
#define BSL_CMD_MASS_ERASE 0x15
#define BSL_CMD_CRC_CHECK 0x16
#define BSL_CMD_LOAD_PC 0x17
#define BSL_CMD_TX_BLOCK 0x18
#define BSL_CMD_TX_VERSION 0x19
#define BSL_CMD_TX_BUFSIZE 0x1A
#define BSL_PACKET_HEADER 0x80
#define BSL_PACKET_ACK 0x90
/* BSL error codes: from SLAU319C ("MSP430 Programming via the Bootstrap
* Loader").
*/
static const char *const bsl_error_table[9] = {
[0x00] = "Success",
[0x01] = "Flash write check failed",
[0x02] = "Flash fail bit set",
[0x03] = "Voltage change during program",
[0x04] = "BSL locked",
[0x05] = "BSL password error",
[0x06] = "Byte write forbidden",
[0x07] = "Unknown command",
[0x08] = "Packet length exceeds buffer size"
};
static const char *bsl_error_message(int code)
{
const char *text = NULL;
if (code >= 0 && code < ARRAY_LEN(bsl_error_table))
text = bsl_error_table[code];
if (text)
return text;
return "Unknown error code";
}
struct loadbsl_device {
struct device base;
transport_t trans;
};
static int send_command(transport_t trans, uint8_t cmd,
address_t addr, const uint8_t *data, int datalen)
{
uint8_t outbuf[BSL_MAX_CORE];
const int addrlen = (addr != ADDRESS_NONE) ? 3 : 0;
const int corelen = datalen + addrlen + 1;
if (datalen > BSL_MAX_BLOCK) {
printc_err("loadbsl: send_command: MAX_BLOCK exceeded: %d\n",
datalen);
return -1;
}
outbuf[0] = cmd;
if (addrlen > 0) {
outbuf[1] = addr & 0xff;
outbuf[2] = (addr >> 8) & 0xff;
outbuf[3] = (addr >> 16) & 0xff;
}
memcpy(outbuf + 1 + addrlen, data, datalen);
if (trans->ops->send(trans, outbuf, corelen) < 0) {
printc_err("loadbsl: send_command failed\n");
return -1;
}
return 0;
}
static int recv_packet(transport_t trans, uint8_t *data, int max_len)
{
uint8_t inbuf[BSL_MAX_CORE];
int len = trans->ops->recv(trans, inbuf, sizeof(inbuf));
int type;
int code;
if (len < 0) {
printc_err("loadbsl: recv_packet: transport error\n");
return -1;
}
if (len < 1) {
printc_err("loadbsl: recv_packet: zero-length packet\n");
return -1;
}
type = inbuf[0];
if (type == 0x3a) {
const int data_len = len - 1;
if (!data)
return 0;
if (data_len > max_len) {
printc_err("loadbsl: recv_packet: packet too "
"long for buffer (%d bytes)\n", data_len);
return -1;
}
memcpy(data, inbuf + 1, data_len);
return data_len;
}
if (type != 0x3b) {
printc_err("loadbsl: recv_packet: unknown packet type: "
"0x%02x\n", type);
return -1;
}
if (len < 2) {
printc_err("loadbsl: recv_packet: missing response code\n");
return -1;
}
code = inbuf[1];
if (code) {
printc_err("loadbsl: recv_packet: BSL error code: %d (%s)\n",
code, bsl_error_message(code));
return -1;
}
return 0;
}
/* Retrieve and display BSL version info. Returns API version byte. */
static int version_check(transport_t trans)
{
uint8_t data[4];
int r;
if (send_command(trans, BSL_CMD_TX_VERSION,
ADDRESS_NONE, NULL, 0) < 0) {
printc_err("loadbsl: failed to send TX_VERSION command\n");
return -1;
}
r = recv_packet(trans, data, 4);
if (r < 0) {
printc_err("loadbsl: failed to receive version\n");
return -1;
}
if (r < 4) {
printc_err("loadbsl: short version response\n");
return -1;
}
printc_dbg("BSL version: [vendor: %02x, int: %02x, "
"API: %02x, per: %02x]\n",
data[0], data[1], data[2], data[3]);
return data[2];
}
static int do_writemem(transport_t trans,
address_t addr, const uint8_t *mem, address_t len)
{
while (len) {
int plen = len;
if (plen > BSL_MAX_BLOCK)
plen = BSL_MAX_BLOCK;
if (send_command(trans, BSL_CMD_RX_BLOCK_FAST,
addr, mem, plen) < 0) {
printc_err("loadbsl: failed to write block "
"to 0x%04x\n", addr);
return -1;
}
addr += plen;
mem += plen;
len -= plen;
}
return 0;
}
static int rx_password(transport_t trans)
{
uint8_t password[32];
memset(password, 0xff, sizeof(password));
if (send_command(trans, BSL_CMD_RX_PASSWORD, ADDRESS_NONE,
password, sizeof(password)) < 0 ||
recv_packet(trans, NULL, 0) < 0) {
printc_err("loadbsl: rx_password failed\n");
return -1;
}
return 0;
}
static int check_and_load(transport_t trans)
{
const struct loadbsl_fw *fw = &loadbsl_fw_usb5xx;
int api_version = version_check(trans);
if ((api_version >= 0) && (api_version != 0x80))
return 0;
printc_dbg("Uploading BSL firmware (%d bytes at address 0x%04x)...\n",
fw->size, fw->prog_addr);
if (do_writemem(trans, fw->prog_addr, fw->data, fw->size) < 0) {
printc_err("loadbsl: firmware upload failed\n");
return -1;
}
printc_dbg("Starting new firmware (PC: 0x%04x)...\n", fw->entry_point);
if (send_command(trans, BSL_CMD_LOAD_PC, fw->entry_point,
NULL, 0) < 0) {
printc_err("loadbsl: PC load failed\n");
return -1;
}
if (trans->ops->suspend && trans->ops->resume &&
trans->ops->suspend(trans) < 0) {
printc_err("loadbsl: transport suspend failed\n");
return -1;
}
printc_dbg("Done, waiting for startup\n");
delay_ms(1000);
if (trans->ops->suspend && trans->ops->resume &&
trans->ops->resume(trans) < 0) {
printc_err("loadbsl: transport resume failed\n");
return -1;
}
if (rx_password(trans) < 0) {
printc_err("loadbsl: failed to unlock new firmware\n");
return -1;
}
return version_check(trans);
}
static void loadbsl_destroy(device_t base)
{
struct loadbsl_device *dev = (struct loadbsl_device *)base;
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static const uint8_t puc_word[] = {0, 0};
/* Write 0x0000 to WDTCTL, triggering a PUC */
if (send_command(dev->trans, BSL_CMD_RX_BLOCK_FAST,
0x15c, puc_word, sizeof(puc_word)) < 0)
printc_err("warning: loadbsl: failed to trigger PUC\n");
dev->trans->ops->destroy(dev->trans);
free(dev);
}
static int loadbsl_readmem(device_t base, address_t addr,
uint8_t *mem, address_t len)
{
struct loadbsl_device *dev = (struct loadbsl_device *)base;
while (len) {
int plen = len;
uint8_t len_param[2];
int r;
if (plen > BSL_MAX_BLOCK)
plen = BSL_MAX_BLOCK;
len_param[0] = plen & 0xff;
len_param[1] = plen >> 8;
if (send_command(dev->trans, BSL_CMD_TX_BLOCK,
addr, len_param, 2) < 0)
goto fail;
r = recv_packet(dev->trans, mem, plen);
if (r < 0)
goto fail;
if (r < plen) {
printc_err("loadbsl: short response to "
"memory read\n");
return -1;
}
addr += plen;
mem += plen;
len -= plen;
}
return 0;
fail:
printc_err("loadbsl: failed to read block from 0x%04x\n", addr);
return -1;
}
static int loadbsl_writemem(device_t base, address_t addr,
const uint8_t *mem, address_t len)
{
struct loadbsl_device *dev = (struct loadbsl_device *)base;
return do_writemem(dev->trans, addr, mem, len);
}
static int loadbsl_getregs(device_t base, address_t *regs)
{
(void)base;
(void)regs;
printc_err("loadbsl: register fetch is not implemented\n");
return -1;
}
static int loadbsl_setregs(device_t base, const address_t *regs)
{
(void)base;
(void)regs;
printc_err("loadbsl: register store is not implemented\n");
return -1;
}
static int loadbsl_erase(device_t base, device_erase_type_t type,
address_t addr)
{
struct loadbsl_device *dev = (struct loadbsl_device *)base;
switch (type) {
case DEVICE_ERASE_ALL:
printc_err("loadbsl: ERASE_ALL not supported\n");
return -1;
case DEVICE_ERASE_MAIN:
if (send_command(dev->trans, BSL_CMD_MASS_ERASE,
ADDRESS_NONE, NULL, 0) < 0 ||
recv_packet(dev->trans, NULL, 0) < 0) {
printc_err("loadbsl: ERASE_MAIN failed\n");
return -1;
}
break;
case DEVICE_ERASE_SEGMENT:
if (send_command(dev->trans, BSL_CMD_ERASE_SEGMENT,
addr, NULL, 0) < 0 ||
recv_packet(dev->trans, NULL, 0) < 0) {
printc_err("loadbsl: ERASE_SEGMENT failed\n");
return -1;
}
break;
}
return 0;
}
static int loadbsl_ctl(device_t base, device_ctl_t type)
{
(void)base;
switch (type) {
case DEVICE_CTL_HALT:
case DEVICE_CTL_RESET:
return 0;
default:
printc_err("loadbsl: CPU control is not possible\n");
return -1;
}
return 0;
}
static device_status_t loadbsl_poll(device_t base)
{
(void)base;
return DEVICE_STATUS_HALTED;
}
static device_t loadbsl_open(const struct device_args *args)
{
struct loadbsl_device *dev;
if (args->flags & DEVICE_FLAG_TTY) {
printc_err("loadbsl: this driver does not support "
"tty access\n");
return NULL;
}
dev = malloc(sizeof(*dev));
memset(dev, 0, sizeof(*dev));
dev->base.type = &device_loadbsl;
dev->base.max_breakpoints = 0;
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#if defined(__APPLE__)
dev->trans = bslosx_open(args->path, args->requested_serial);
#else
dev->trans = bslhid_open(args->path, args->requested_serial);
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#endif
if (!dev->trans) {
free(dev);
return NULL;
}
if (rx_password(dev->trans) < 0) {
printc_dbg("loadbsl: retrying password...\n");
if (rx_password(dev->trans) < 0) {
dev->trans->ops->destroy(dev->trans);
free(dev);
return NULL;
}
}
if (check_and_load(dev->trans) < 0) {
dev->trans->ops->destroy(dev->trans);
free(dev);
return NULL;
}
return &dev->base;
}
const struct device_class device_loadbsl = {
.name = "load-bsl",
.help = "Loadable USB BSL driver (USB 5xx/6xx).",
.open = loadbsl_open,
.destroy = loadbsl_destroy,
.readmem = loadbsl_readmem,
.writemem = loadbsl_writemem,
.erase = loadbsl_erase,
.getregs = loadbsl_getregs,
.setregs = loadbsl_setregs,
.ctl = loadbsl_ctl,
.poll = loadbsl_poll
};