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twiboot/linux/mpm.c

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C
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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <termios.h>
#include <sys/time.h>
#include "chipinfo_avr.h"
#include "multiboot.h"
#include "optarg.h"
#define READ_BLOCK_SIZE 256 /* bytes in one flash/eeprom read request */
#define WRITE_BLOCK_SIZE 16 /* bytes in one eeprom write request */
#define CMD_SWITCH_APPLICATION 0x01
#define CMD_GET_BOOTLOADER_VERSION 0x02
#define CMD_GET_CHIP_INFO 0x03
#define CMD_READ_MEMORY 0x11
#define CMD_WRITE_MEMORY 0x12
#define CAUSE_SUCCESS 0x00
#define CAUSE_COMMAND_NOT_SUPPORTED 0xF0
#define CAUSE_INVALID_PARAMETER 0xF1
#define CAUSE_UNSPECIFIED_ERROR 0xFF
/* CMD_SWITCH_APPLICATION parameter */
#define BOOTTYPE_BOOTLOADER 0x00
#define BOOTTYPE_APPLICATION 0x80
#define MEMTYPE_FLASH 0x01
#define MEMTYPE_EEPROM 0x02
#define ARRAY_SIZE(x) (sizeof(x) / sizeof(*x))
#define MIN(a, b) ((a) < (b) ? (a) : (b))
struct multiboot_ops mpm_ops;
struct mpm_privdata {
char *device;
int fd;
int connected;
int address;
int flashsize;
int flashpage;
int eepromsize;
struct termios oldtio;
};
static struct option mpm_optargs[] = {
{"address", 1, 0, 'a'}, /* -a <addr> */
{"device", 1, 0, 'd'}, /* [ -d <device> ] */
};
static int mpm_optarg_cb(int val, const char *arg, void *privdata)
{
struct mpm_privdata *mpm = (struct mpm_privdata *)privdata;
switch (val) {
case 'a': /* address */
{
char *endptr;
mpm->address = strtol(arg, &endptr, 16);
if (*endptr != '\0' || mpm->address < 0x01 || mpm->address > 0x7F) {
fprintf(stderr, "invalid address: '%s'\n", arg);
return -1;
}
}
break;
case 'd': /* device */
{
if (mpm->device != NULL) {
fprintf(stderr, "invalid device: '%s'\n", optarg);
return -1;
}
mpm->device = strdup(optarg);
if (mpm->device == NULL) {
perror("strdup()");
return -1;
}
}
break;
case 'h':
case '?': /* error */
fprintf(stderr, "Usage: mpmboot [options]\n"
" -a <address> - selects mpm address (0x01 - 0xFF)\n"
" -d <device> - selects mpm device\n"
" -r <flash|eeprom>:<file> - reads flash/eeprom to file (.bin | .hex | -)\n"
" -w <flash|eeprom>:<file> - write flash/eeprom from file (.bin | .hex)\n"
" -n - disable verify after write\n"
" -p <0|1|2> - progress bar mode\n"
"\n"
"Example: mpmboot -d /dev/ttyUSB0 -a 0x22 -w flash:blmc.hex -w flash:blmc_eeprom.hex\n"
"\n");
return -1;
default:
return 1;
}
return 0;
}
static struct multiboot * mpm_alloc(void)
{
struct multiboot * mboot = malloc(sizeof(struct multiboot));
if (mboot == NULL)
return NULL;
memset(mboot, 0x00, sizeof(struct multiboot));
mboot->ops = &mpm_ops;
struct mpm_privdata *mpm = malloc(sizeof(struct mpm_privdata));
if (mpm == NULL) {
free(mboot);
return NULL;
}
memset(mpm, 0x00, sizeof(struct mpm_privdata));
mpm->device = NULL;
mpm->address = 0;
optarg_register(mpm_optargs, ARRAY_SIZE(mpm_optargs), mpm_optarg_cb, (void *)mpm);
mboot->privdata = mpm;
return mboot;
}
static void mpm_free(struct multiboot *mboot)
{
struct mpm_privdata *mpm = (struct mpm_privdata *)mboot->privdata;
if (mpm->device != NULL)
free(mpm->device);
free(mpm);
free(mboot);
}
static int mpm_get_memtype(struct multiboot *mboot, const char *memname)
{
if (strcmp(memname, "flash") == 0)
return MEMTYPE_FLASH;
else if (strcmp(memname, "eeprom") == 0)
return MEMTYPE_EEPROM;
return -1;
}
static int mpm_get_memsize(struct multiboot *mboot, int memtype)
{
struct mpm_privdata *mpm = (struct mpm_privdata *)mboot->privdata;
if (!mpm->connected)
return 0;
switch (memtype) {
case MEMTYPE_FLASH:
return mpm->flashsize;
case MEMTYPE_EEPROM:
return mpm->eepromsize;
default:
return 0;
}
}
static int mpm_send(struct mpm_privdata *mpm, uint8_t command, uint8_t *data, int length)
{
struct termios tio;
if (tcgetattr(mpm->fd, &tio) < 0) {
perror("tcgetattr(tio)");
return -1;
}
tio.c_cflag |= PARODD;
if (tcsetattr(mpm->fd, TCSAFLUSH, &tio) < 0) {
perror("tcsetattr(tio)");
return -1;
}
// usleep(5000);
uint8_t address = mpm->address;
if (write(mpm->fd, &address, sizeof(address)) != sizeof(address)) {
perror("write(address)");
return -1;
}
usleep(500);
tio.c_cflag &= ~(PARODD);
if (tcsetattr(mpm->fd, TCSAFLUSH, &tio) < 0) {
perror("tcsetattr(tio)");
return -1;
}
uint8_t header[3];
header[0] = command;
header[1] = (length >> 8) & 0xFF;
header[2] = length & 0xFF;
if (write(mpm->fd, header, sizeof(header)) != sizeof(header)) {
perror("write(header)");
return -1;
}
if (data != NULL && length != 0) {
if (write(mpm->fd, data, length) != length) {
perror("write(data)");
return -1;
}
}
return 0;
}
static int myread(int fd, void *data, int size)
{
int pos = 0;
while (1) {
fd_set fdset;
struct timeval timeout = { .tv_sec = 1, .tv_usec = 0 };
FD_ZERO(&fdset);
FD_SET(fd, &fdset);
int ret = select(fd +1, &fdset, NULL, NULL, &timeout);
if (ret == -1) {
perror("select");
return -1;
} else if (ret == 0) {
break;
} else if (FD_ISSET(fd, &fdset)) {
int len = read(fd, data + pos, size - pos);
if (len < 0) {
return -1;
} else {
pos += len;
if (pos == size) {
break;
}
}
}
}
return pos;
}
static int mpm_recv(struct mpm_privdata *mpm, uint8_t command, uint8_t *cause, uint8_t *buffer, uint16_t buffersize)
{
int len;
uint8_t header[4];
len = myread(mpm->fd, header, sizeof(header));
if (len != sizeof(header)) {
fprintf(stderr, "short read() from device (not addressed?)\n");
return -1;
}
if (header[0] != command) {
fprintf(stderr, "invalid command response (0x%02x != 0x%02x)\n", header[0], command);
return -1;
}
*cause = header[1];
uint16_t length = (header[2] << 8) | header[3];
// printf("mpm_recv() cmd=0x%02x cause=0x%02x length=0x%04x\n", command, *cause, length);
uint16_t bufferpos = 0;
while (length > 0) {
/* free space in output buffer? */
if ((bufferpos < buffersize) && (buffer != NULL)) {
uint16_t size = MIN(buffersize - bufferpos, length);
len = myread(mpm->fd, buffer + bufferpos, size);
if (len <= 0) {
fprintf(stderr, "short read() from device (%d != %d)\n", len, size);
return -1;
}
bufferpos += len;
length -= len;
} else {
uint8_t dummy[256];
/* no space in output buffer, but device still sends data -> do dummy read */
uint16_t size = MIN(sizeof(dummy), length);
len = myread(mpm->fd, dummy, size);
if (len <= 0) {
fprintf(stderr, "short read() from device (%d != %d)\n", len, size);
return -1;
}
length -= len;
}
}
return bufferpos;
}
static void mpm_close_device(struct mpm_privdata *mpm)
{
/* delay close() / tcsetattr() */
usleep(100000);
tcsetattr(mpm->fd, TCSANOW, &mpm->oldtio);
close(mpm->fd);
}
static int mpm_open_device(struct mpm_privdata *mpm)
{
mpm->fd = open(mpm->device, O_RDWR | O_NOCTTY | O_CLOEXEC);
if (mpm->fd < 0) {
perror("open()");
return -1;
}
if (tcgetattr(mpm->fd, &mpm->oldtio) < 0) {
perror("tcgetattr(oldtio)");
close(mpm->fd);
return -1;
}
struct termios newtio;
memset(&newtio, 0, sizeof(newtio));
newtio.c_iflag |= IGNBRK;
newtio.c_cflag |= B115200 | CS8 | CLOCAL | CREAD | PARENB | CMSPAR;
newtio.c_cc[VMIN] = 1;
newtio.c_cc[VTIME] = 0;
int err = tcsetattr(mpm->fd, TCSANOW, &newtio);
if (err < 0) {
perror("tcsetattr(newtio)");
close(mpm->fd);
return -1;
}
mpm->connected = 1;
return 0;
}
static int mpm_switch_application(struct mpm_privdata *mpm, uint8_t application)
{
uint8_t data[] = { application };
int ret = mpm_send(mpm, CMD_SWITCH_APPLICATION, data, sizeof(data));
if (ret < 0)
return ret;
uint8_t cause = CAUSE_SUCCESS;
ret = mpm_recv(mpm, CMD_SWITCH_APPLICATION, &cause, NULL, 0);
if (ret < 0)
return ret;
return (cause != CAUSE_SUCCESS);
}
static int mpm_read_version(struct mpm_privdata *mpm, uint8_t *version, uint16_t length)
{
memset(version, 0, length);
int ret = mpm_send(mpm, CMD_GET_BOOTLOADER_VERSION, NULL, 0);
if (ret < 0)
return ret;
uint8_t cause = CAUSE_SUCCESS;
ret = mpm_recv(mpm, CMD_GET_BOOTLOADER_VERSION, &cause, version, length);
if (ret < 0)
return ret;
int i;
for (i = 0; i < length; i++)
version[i] &= ~0x80;
return (cause != CAUSE_SUCCESS);
}
static int mpm_read_chipinfo(struct mpm_privdata *mpm, uint8_t *chipinfo, uint16_t length)
{
int ret = mpm_send(mpm, CMD_GET_CHIP_INFO, NULL, 0);
if (ret < 0)
return ret;
uint8_t cause = CAUSE_SUCCESS;
ret = mpm_recv(mpm, CMD_GET_CHIP_INFO, &cause, chipinfo, length);
if (ret < 0)
return ret;
return (cause != CAUSE_SUCCESS);
}
static int mpm_read_memory(struct mpm_privdata *mpm, uint8_t *buffer, uint16_t size, uint8_t memtype, uint16_t address)
{
uint8_t param[5] = {
memtype,
(address >> 8) & 0xFF,
(address & 0xFF),
(size >> 8) & 0xFF,
(size & 0xFF)
};
int ret = mpm_send(mpm, CMD_READ_MEMORY, param, sizeof(param));
if (ret < 0)
return ret;
uint8_t cause = CAUSE_SUCCESS;
ret = mpm_recv(mpm, CMD_READ_MEMORY, &cause, buffer, size);
if (ret < 0)
return ret;
return (cause != CAUSE_SUCCESS);
}
static int mpm_write_memory(struct mpm_privdata *mpm, uint8_t *buffer, uint16_t size, uint8_t memtype, uint16_t address)
{
int bufsize;
if (memtype == MEMTYPE_FLASH) {
if ((address & (mpm->flashpage -1)) != 0x00) {
fprintf(stderr, "mpm_write_memory(): address 0x%04x not aligned to pagesize 0x%02x\n", address, mpm->flashpage);
return -1;
}
bufsize = 5 + mpm->flashpage;
} else {
bufsize = 5 + size;
}
uint8_t *cmd = malloc(bufsize);
if (cmd == NULL)
return -1;
cmd[0] = memtype;
cmd[1] = (address >> 8) & 0xFF;
cmd[2] = (address & 0xFF);
cmd[3] = ((bufsize -5) >> 8) & 0xFF;
cmd[4] = ((bufsize -5) & 0xFF);
memcpy(cmd +5, buffer, size);
if (memtype == MEMTYPE_FLASH) {
memset(cmd +5 +size, 0xFF, mpm->flashpage - size);
}
int ret = mpm_send(mpm, CMD_WRITE_MEMORY, cmd, bufsize);
if (ret < 0)
return ret;
free(cmd);
uint8_t cause = CAUSE_SUCCESS;
ret = mpm_recv(mpm, CMD_WRITE_MEMORY, &cause, NULL, 0);
if (ret < 0)
return ret;
return (cause != CAUSE_SUCCESS);
}
static int mpm_close(struct multiboot *mboot)
{
struct mpm_privdata *mpm = (struct mpm_privdata *)mboot->privdata;
if (mpm->connected)
mpm_switch_application(mpm, BOOTTYPE_APPLICATION);
mpm_close_device(mpm);
return 0;
}
static int mpm_open(struct multiboot *mboot)
{
struct mpm_privdata *mpm = (struct mpm_privdata *)mboot->privdata;
if (mpm->address == 0) {
fprintf(stderr, "abort: no address given\n");
return -1;
}
if (mpm->device == NULL) {
fprintf(stderr, "abort: no device given\n");
return -1;
}
if (mpm_open_device(mpm) < 0)
return -1;
if (mpm_switch_application(mpm, BOOTTYPE_BOOTLOADER)) {
fprintf(stderr, "failed to switch to bootloader (invalid address?)\n");
mpm_close(mboot);
return -1;
}
/* wait for watchdog and startup time */
usleep(100000);
char version[16];
if (mpm_read_version(mpm, (uint8_t *)version, sizeof(version))) {
fprintf(stderr, "failed to get bootloader version");
mpm_close(mboot);
return -1;
}
uint8_t chipinfo[8];
if (mpm_read_chipinfo(mpm, chipinfo, sizeof(chipinfo))) {
fprintf(stderr, "failed to get bootloader version");
mpm_close(mboot);
return -1;
}
const char *chipname = chipinfo_get_avr_name(chipinfo);
mpm->flashpage = chipinfo[3];
mpm->flashsize = (chipinfo[4] << 8) + chipinfo[5];
mpm->eepromsize = (chipinfo[6] << 8) + chipinfo[7];
printf("device : %-16s (address: 0x%02X)\n", mpm->device, mpm->address);
printf("version : %-16s (sig: 0x%02x 0x%02x 0x%02x => %s)\n", version, chipinfo[0], chipinfo[1], chipinfo[2], chipname);
printf("flash size : 0x%04x / %5d (0x%02x bytes/page)\n", mpm->flashsize, mpm->flashsize, mpm->flashpage);
printf("eeprom size : 0x%04x / %5d\n", mpm->eepromsize, mpm->eepromsize);
return 0;
}
static int mpm_read(struct multiboot *mboot, struct databuf *dbuf, int memtype)
{
struct mpm_privdata *mpm = (struct mpm_privdata *)mboot->privdata;
char *progress_msg = (memtype == MEMTYPE_FLASH) ? "reading flash" : "reading eeprom";
int pos = 0;
int size = (memtype == MEMTYPE_FLASH) ? mpm->flashsize : mpm->eepromsize;
while (pos < size) {
mboot->progress_cb(progress_msg, pos, size);
int len = MIN(READ_BLOCK_SIZE, size - pos);
if (mpm_read_memory(mpm, dbuf->data + pos, len, memtype, pos)) {
mboot->progress_cb(progress_msg, -1, -1);
return -1;
}
pos += len;
}
dbuf->length = pos;
mboot->progress_cb(progress_msg, pos, size);
return 0;
}
static int mpm_write(struct multiboot *mboot, struct databuf *dbuf, int memtype)
{
struct mpm_privdata *mpm = (struct mpm_privdata *)mboot->privdata;
char *progress_msg = (memtype == MEMTYPE_FLASH) ? "writing flash" : "writing eeprom";
int pos = 0;
while (pos < dbuf->length) {
mboot->progress_cb(progress_msg, pos, dbuf->length);
int len = (memtype == MEMTYPE_FLASH) ? mpm->flashpage : WRITE_BLOCK_SIZE;
len = MIN(len, dbuf->length - pos);
if (mpm_write_memory(mpm, dbuf->data + pos, len, memtype, pos)) {
mboot->progress_cb(progress_msg, -1, -1);
return -1;
}
pos += len;
}
mboot->progress_cb(progress_msg, pos, dbuf->length);
return 0;
}
static int mpm_verify(struct multiboot *mboot, struct databuf *dbuf, int memtype)
{
struct mpm_privdata *mpm = (struct mpm_privdata *)mboot->privdata;
char *progress_msg = (memtype == MEMTYPE_FLASH) ? "verifing flash" : "verifing eeprom";
int pos = 0;
uint8_t comp[READ_BLOCK_SIZE];
while (pos < dbuf->length) {
mboot->progress_cb(progress_msg, pos, dbuf->length);
int len = MIN(READ_BLOCK_SIZE, dbuf->length - pos);
if (mpm_read_memory(mpm, comp, len, memtype, pos)) {
mboot->progress_cb(progress_msg, -1, -1);
return -1;
}
if (memcmp(comp, dbuf->data + pos, len) != 0x00) {
mboot->progress_cb(progress_msg, -1, -1);
fprintf(stderr, "verify failed at page 0x%04x!!\n", pos);
return -1;
}
pos += len;
}
dbuf->length = pos;
mboot->progress_cb(progress_msg, pos, dbuf->length);
return 0;
}
struct multiboot_ops mpm_ops = {
.alloc = mpm_alloc,
.free = mpm_free,
.get_memtype = mpm_get_memtype,
.get_memsize = mpm_get_memsize,
.open = mpm_open,
.close = mpm_close,
.read = mpm_read,
.write = mpm_write,
.verify = mpm_verify,
};
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