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twiboot
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add linux tool

This commit is contained in:
Olaf Rempel 2010-10-16 19:29:15 +02:00
parent 8a98e09c46
commit 6244c44e65
7 changed files with 1403 additions and 0 deletions
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3
linux/.gitignore vendored Normal file
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*.o
*.d
twiboot

22
linux/Makefile Normal file
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TARGET = twiboot
CFLAGS = -Wall -Wno-unused-result -O2 -MMD -MP -MF $(*F).d
# ------
SRC := $(wildcard *.c)
all: $(TARGET)
$(TARGET): $(SRC:.c=.o)
@echo " Linking file: $@"
@$(CC) $(CFLAGS) $^ -o $@ $(LDFLAGS) > /dev/null
%.o: %.c
@echo " Building file: $<"
@$(CC) -c $(CFLAGS) $< -o $@
clean:
rm -rf $(TARGET) *.o *.d
-include $(shell find . -name \*.d 2> /dev/null)

423
linux/filedata.c Normal file
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/***************************************************************************
* Copyright (C) 10/2010 by Olaf Rempel *
* razzor@kopf-tisch.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; version 2 of the License, *
* *
* 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "twiboot.h"
#define FILETYPE_UNKNOWN 0
#define FILETYPE_BINARY 1
#define FILETYPE_INTELHEX 2
int dbuf_alloc(struct databuf **dbuf, uint32_t size)
{
*dbuf = malloc(sizeof(struct databuf) + size);
if (*dbuf == NULL) {
perror("dbuf_alloc");
return -1;
}
memset((*dbuf)->data, 0xFF, size);
(*dbuf)->size = size;
(*dbuf)->length = 0;
return 0;
}
void dbuf_free(struct databuf *dbuf)
{
free(dbuf);
}
static void dbuf_dump(struct databuf *dbuf)
{
int pos = 0, oldskip = 0;
while (pos < dbuf->length) {
char buf[128];
int j, i = 0;
int skip = 1;
for (j = 0; j < 16; j++) {
if (pos + j < dbuf->length)
i += sprintf(buf + i, "%02X", dbuf->data[pos + j]);
else
i += sprintf(buf + i, " ");
if (j % 2)
buf[i++] = ' ';
}
for (j = 0; j < 16; j++) {
if (pos + j < dbuf->length) {
unsigned char val = dbuf->data[pos + j];
if (val >= 0x20 && val < 0x7F)
buf[i++] = val;
else
buf[i++] = '.';
if (val != 0xFF)
skip = 0;
} else {
buf[i++] = ' ';
}
}
if (pos == 0 || (pos + 16) >= dbuf->length || skip == 0) {
buf[i++] = '\0';
printf("%04X: %s\r\n", pos, buf);
oldskip = 0;
} else if (skip == 1 && oldskip == 0) {
printf("****\n");
oldskip = 1;
}
pos += 16;
}
}
static int binfile_getsize(const char *filename, uint32_t *size)
{
int fd = open(filename, O_RDONLY);
if (fd < 0) {
perror("binfile_getsize(): open()");
return -1;
}
struct stat filestat;
if (fstat(fd, &filestat) < 0) {
perror("binfile_getsize(): fstat()");
close(fd);
return -1;
}
*size = filestat.st_size;
close(fd);
return 0;
}
static int binfile_read(const char *filename, struct databuf *dbuf)
{
int fd = open(filename, O_RDONLY);
if (fd < 0) {
perror("binfile_read(): open()");
return -1;
}
ssize_t readsize = read(fd, dbuf->data, dbuf->size);
if (readsize <= 0) {
perror("binfile_read(): read()");
close(fd);
return -1;
}
dbuf->length = readsize;
close(fd);
return 0;
}
static int binfile_write(const char *filename, struct databuf *dbuf)
{
int fd = open(filename, O_RDWR | O_CREAT | O_TRUNC, 0644);
if (fd < 0) {
perror("binfile_write(): open()");
return -1;
}
ssize_t writesize = write(fd, dbuf->data, dbuf->length);
if (writesize != dbuf->length) {
perror("binfile_write(): write()");
close(fd);
return -1;
}
close(fd);
return 0;
}
struct ihex_record {
uint8_t byte_count;
uint16_t address;
uint8_t type;
uint8_t *data;
uint8_t chksum;
};
static uint8_t hex2byte(const char *ptr)
{
int i;
uint8_t result = 0;
for (i = 0; i < 2; i++) {
result <<= 4;
result |= (ptr[i] >= '0' && ptr[i] <= '9') ? (ptr[i] - '0') :
(((ptr[i] & 0xDF) >= 'A' && (ptr[i] & 0xDF) <= 'F') ? (ptr[i] - 'A' + 0x0A) :
0x00);
}
return result;
}
static int hexfile_getrecord(FILE *stream, struct ihex_record *record)
{
char *hexline = NULL;
size_t size;
ssize_t length = getline(&hexline, &size, stream);
if (length == -1) {
if (!feof(stream)) {
perror("hexfile_getrecord(): getline()");
}
return -1;
}
if (length < 12) {
fprintf(stderr, "record too short (%d)\n", length);
free(hexline);
return -1;
}
int pos = 0;
if (hexline[pos] != ':') {
fprintf(stderr, "invalid startcode\n");
free(hexline);
return -1;
}
pos++;
uint8_t chksum = 0x00;
record->byte_count = hex2byte(&hexline[pos]);
chksum += record->byte_count;
pos += 2;
if (record->byte_count > 0) {
record->data = malloc(record->byte_count);
if (record->data == NULL) {
perror("hexfile_getrecord(): malloc()");
free(hexline);
return -1;
}
}
uint8_t hiaddr = hex2byte(&hexline[pos]);
uint8_t loaddr = hex2byte(&hexline[pos +2]);
record->address = (hiaddr << 8) + loaddr;
chksum += hiaddr + loaddr;
pos += 4;
record->type = hex2byte(&hexline[pos]);
chksum += record->type;
pos += 2;
int i;
for (i = 0; i < record->byte_count; i++) {
record->data[i] = hex2byte(&hexline[pos]);
chksum += record->data[i];
pos += 2;
}
record->chksum = hex2byte(&hexline[pos]);
chksum += record->chksum;
pos += 2;
if (chksum != 0x00) {
fprintf(stderr, "invalid checksum (0x%02X)\n", chksum);
if (record->byte_count > 0)
free(record->data);
free(hexline);
return -1;
}
free(hexline);
return 0;
}
static int hexfile_putrecord(FILE *stream, struct ihex_record *record)
{
uint8_t chksum = record->byte_count;
chksum += (record->address >> 8) & 0xFF;
chksum += (record->address & 0xFF);
chksum += record->type;
int i, len = 0;
char buf[64];
buf[0] = '\0';
for (i = 0; i < record->byte_count; i++) {
len += snprintf(buf + len, sizeof(buf) - len, "%02X", record->data[i]);
chksum += record->data[i];
}
fprintf(stream, ":%02X%04X%02X%s%02X\n", record->byte_count, record->address, record->type, buf, (uint8_t)(0x100 - chksum));
return -1;
}
static int hexfile_getsize(const char *filename, uint32_t *size)
{
*size = 0x10000;
return 0;
}
static int hexfile_read(const char *filename, struct databuf *dbuf)
{
FILE *stream = fopen(filename, "r");
if (stream == NULL) {
perror("hexfile_read(): fopen()");
return -1;
}
while (1) {
struct ihex_record record;
memset(&record, 0x00, sizeof(struct ihex_record));
int result = hexfile_getrecord(stream, &record);
if (result == -1)
break;
if (record.type == 0x00) {
if (record.address > dbuf->size || record.address + record.byte_count > dbuf->size) {
fprintf(stderr, "hexfile_read(): data out of bounds\n");
break;
}
memcpy(&dbuf->data[record.address], record.data, record.byte_count);
dbuf->length = record.address + record.byte_count;
}
}
fclose(stream);
return 0;
}
static int hexfile_write(const char *filename, struct databuf *dbuf)
{
FILE *stream = fopen(filename, "w");
if (stream == NULL) {
perror("hexfile_write(): fopen()");
return -1;
}
int i;
int addr_min = dbuf->length;
int addr_max = 0;
for (i = 0; i < dbuf->length; i++) {
if (dbuf->data[i] == 0xFF)
continue;
if (addr_min > i)
addr_min = i;
if (addr_max < i)
addr_max = i;
}
addr_min = addr_min & ~0x0F;
addr_max = (addr_max + 0x0F) & ~0x0F;
struct ihex_record record;
for (i = addr_min; i < addr_max; i += 0x10) {
record.byte_count = 0x10;
record.address = i;
record.type = 0x00;
record.data = &dbuf->data[i];
hexfile_putrecord(stream, &record);
}
record.byte_count = 0x00;
record.address = addr_min;
record.type = 0x01;
record.data = NULL;
hexfile_putrecord(stream, &record);
fclose(stream);
return 0;
}
static int get_filetype(const char *filename)
{
const char *ext = filename + (strlen(filename) -4);
if (ext < filename)
return FILETYPE_UNKNOWN;
if (strncmp(ext, ".bin", 4) == 0)
return FILETYPE_BINARY;
if (strncmp(ext, ".hex", 4) == 0)
return FILETYPE_INTELHEX;
return FILETYPE_UNKNOWN;
}
int file_getsize(const char *filename, uint32_t *size)
{
switch (get_filetype(filename)) {
case FILETYPE_BINARY:
return binfile_getsize(filename, size);
case FILETYPE_INTELHEX:
return hexfile_getsize(filename, size);
default:
return -1;
}
}
int file_read(const char *filename, struct databuf *dbuf)
{
switch (get_filetype(filename)) {
case FILETYPE_BINARY:
return binfile_read(filename, dbuf);
case FILETYPE_INTELHEX:
return hexfile_read(filename, dbuf);
default:
return -1;
}
}
int file_write(const char *filename, struct databuf *dbuf)
{
if (strncmp(filename, "-", 1) == 0) {
dbuf_dump(dbuf);
return 0;
}
switch (get_filetype(filename)) {
case FILETYPE_BINARY:
return binfile_write(filename, dbuf);
case FILETYPE_INTELHEX:
return hexfile_write(filename, dbuf);
default:
return -1;
}
}

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#ifndef _LIST_H_
#define _LIST_H_
/*
* stolen from linux kernel 2.6.11 (http://kernel.org/)
* linux/include/linux/stddef.h (offsetoff)
* linux/include/linux/kernel.h (container_of)
* linux/include/linux/list.h (*list*)
* linux/include/linux/netfilter_ipv4/listhelp.h (LIST_FIND)
*
* modified by Olaf Rempel <razzor@kopf-tisch.de>
*/
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
#define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
struct list_head {
struct list_head *next, *prev;
};
#define LIST_HEAD_INIT(name) { &(name), &(name) }
#define LIST_HEAD(name) \
struct list_head name = LIST_HEAD_INIT(name)
#define INIT_LIST_HEAD(ptr) do { \
(ptr)->next = (ptr); (ptr)->prev = (ptr); \
} while (0)
/*
* Insert a new entry between two known consecutive entries.
*
* This is only for internal list manipulation where we know
* the prev/next entries already!
*/
static inline void __list_add(struct list_head *new,
struct list_head *prev,
struct list_head *next)
{
next->prev = new;
new->next = next;
new->prev = prev;
prev->next = new;
}
/*
* list_add - add a new entry
* @new: new entry to be added
* @head: list head to add it after
*
* Insert a new entry after the specified head.
* This is good for implementing stacks.
*/
static inline void list_add(struct list_head *new, struct list_head *head)
{
__list_add(new, head, head->next);
}
/*
* list_add_tail - add a new entry
* @new: new entry to be added
* @head: list head to add it before
*
* Insert a new entry before the specified head.
* This is useful for implementing queues.
*/
static inline void list_add_tail(struct list_head *new, struct list_head *head)
{
__list_add(new, head->prev, head);
}
/*
* Delete a list entry by making the prev/next entries
* point to each other.
*
* This is only for internal list manipulation where we know
* the prev/next entries already!
*/
static inline void __list_del(struct list_head * prev, struct list_head * next)
{
next->prev = prev;
prev->next = next;
}
/*
* list_del - deletes entry from list.
* @entry: the element to delete from the list.
* Note: list_empty on entry does not return true after this, the entry is
* in an undefined state.
*/
static inline void list_del(struct list_head *entry)
{
__list_del(entry->prev, entry->next);
entry->next = NULL;
entry->prev = NULL;
}
/*
* list_del_init - deletes entry from list and reinitialize it.
* entry: the element to delete from the list.
*/
static inline void list_del_init(struct list_head *entry)
{
__list_del(entry->prev, entry->next);
INIT_LIST_HEAD(entry);
}
/*
* list_move - delete from one list and add as another's head
* @list: the entry to move
* @head: the head that will precede our entry
*/
static inline void list_move(struct list_head *list, struct list_head *head)
{
__list_del(list->prev, list->next);
list_add(list, head);
}
/*
* list_move_tail - delete from one list and add as another's tail
* @list: the entry to move
* @head: the head that will follow our entry
*/
static inline void list_move_tail(struct list_head *list,
struct list_head *head)
{
__list_del(list->prev, list->next);
list_add_tail(list, head);
}
/*
* list_empty - tests whether a list is empty
* @head: the list to test.
*/
static inline int list_empty(const struct list_head *head)
{
return head->next == head;
}
static inline void __list_splice(struct list_head *list,
struct list_head *head)
{
struct list_head *first = list->next;
struct list_head *last = list->prev;
struct list_head *at = head->next;
first->prev = head;
head->next = first;
last->next = at;
at->prev = last;
}
/*
* list_splice - join two lists
* @list: the new list to add.
* @head: the place to add it in the first list.
*/
static inline void list_splice(struct list_head *list, struct list_head *head)
{
if (!list_empty(list))
__list_splice(list, head);
}
/*
* list_splice_init - join two lists and reinitialise the emptied list.
* @list: the new list to add.
* @head: the place to add it in the first list.
*
* The list at @list is reinitialised
*/
static inline void list_splice_init(struct list_head *list,
struct list_head *head)
{
if (!list_empty(list)) {
__list_splice(list, head);
INIT_LIST_HEAD(list);
}
}
/*
* list_entry - get the struct for this entry
* @ptr: the &struct list_head pointer.
* @type: the type of the struct this is embedded in.
* @member: the name of the list_struct within the struct.
*/
#define list_entry(ptr, type, member) \
container_of(ptr, type, member)
/*
* list_for_each - iterate over a list
* @pos: the &struct list_head to use as a loop counter.
* @head: the head for your list.
*/
#define list_for_each(pos, head) \
for (pos = (head)->next; pos != (head); pos = pos->next)
/*
* list_for_each_prev - iterate over a list backwards
* @pos: the &struct list_head to use as a loop counter.
* @head: the head for your list.
*/
#define list_for_each_prev(pos, head) \
for (pos = (head)->prev; pos != (head); pos = pos->prev)
/*
* list_for_each_safe - iterate over a list safe against removal of list entry
* @pos: the &struct list_head to use as a loop counter.
* @n: another &struct list_head to use as temporary storage
* @head: the head for your list.
*/
#define list_for_each_safe(pos, n, head) \
for (pos = (head)->next, n = pos->next; pos != (head); \
pos = n, n = pos->next)
/*
* list_for_each_entry - iterate over list of given type
* @pos: the type * to use as a loop counter.
* @head: the head for your list.
* @member: the name of the list_struct within the struct.
*/
#define list_for_each_entry(pos, head, member) \
for (pos = list_entry((head)->next, typeof(*pos), member); \
&pos->member != (head); \
pos = list_entry(pos->member.next, typeof(*pos), member))
/*
* list_for_each_entry_reverse - iterate backwards over list of given type.
* @pos: the type * to use as a loop counter.
* @head: the head for your list.
* @member: the name of the list_struct within the struct.
*/
#define list_for_each_entry_reverse(pos, head, member) \
for (pos = list_entry((head)->prev, typeof(*pos), member); \
&pos->member != (head); \
pos = list_entry(pos->member.prev, typeof(*pos), member))
/*
* list_for_each_entry_safe - iterate over list of given type safe against removal of list entry
* @pos: the type * to use as a loop counter.
* @n: another type * to use as temporary storage
* @head: the head for your list.
* @member: the name of the list_struct within the struct.
*/
#define list_for_each_entry_safe(pos, n, head, member) \
for (pos = list_entry((head)->next, typeof(*pos), member), \
n = list_entry(pos->member.next, typeof(*pos), member); \
&pos->member != (head); \
pos = n, n = list_entry(n->member.next, typeof(*n), member))
/* Return pointer to first true entry, if any, or NULL. A macro
required to allow inlining of cmpfn. */
#define LIST_FIND(head, cmpfn, type, args...) \
({ \
const struct list_head *__i, *__j = NULL; \
\
list_for_each(__i, (head)) \
if (cmpfn((const type)__i , ## args)) { \
__j = __i; \
break; \
} \
(type)__j; \
})
#endif /* _LIST_H_ */

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/***************************************************************************
* Copyright (C) 10/2010 by Olaf Rempel *
* razzor@kopf-tisch.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; version 2 of the License, *
* *
* 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <dirent.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <linux/i2c.h>
#include <linux/i2c-dev.h>
#include "list.h"
#include "twiboot.h"
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define READ_BLOCK_SIZE 128 /* bytes in one flash/eeprom read request */
#define WRITE_BLOCK_SIZE 16 /* bytes in one eeprom write request */
/* SLA+R */
#define CMD_WAIT 0x00
#define CMD_READ_VERSION 0x01
#define CMD_READ_MEMORY 0x02
/* SLA+W */
#define CMD_SWITCH_APPLICATION CMD_READ_VERSION
#define CMD_WRITE_MEMORY CMD_READ_MEMORY
/* CMD_SWITCH_APPLICATION parameter */
#define BOOTTYPE_BOOTLOADER 0x00 /* only in APP */
#define BOOTTYPE_APPLICATION 0x80
/* CMD_{READ|WRITE}_* parameter */
#define MEMTYPE_CHIPINFO 0x00
#define MEMTYPE_FLASH 0x01
#define MEMTYPE_EEPROM 0x02
#define MEMTYPE_PARAMETERS 0x03 /* only in APP */
static int twb_switch_application(struct twiboot *twb, uint8_t application)
{
uint8_t cmd[] = { CMD_SWITCH_APPLICATION, application };
return (write(twb->fd, cmd, sizeof(cmd)) != sizeof(cmd));
}
static int twb_read_version(struct twiboot *twb)
{
uint8_t cmd[] = { CMD_READ_VERSION };
if (write(twb->fd, cmd, sizeof(cmd)) != sizeof(cmd))
return -1;
memset(twb->version, 0, sizeof(twb->version));
if (read(twb->fd, twb->version, sizeof(twb->version)) != sizeof(twb->version))
return -1;
int i;
for (i = 0; i < sizeof(twb->version); i++)
twb->version[i] &= ~0x80;
return 0;
}
static int twb_read_memory(struct twiboot *twb, uint8_t *buffer, uint8_t size, uint8_t memtype, uint16_t address)
{
uint8_t cmd[] = { CMD_READ_MEMORY, memtype, (address >> 8) & 0xFF, (address & 0xFF) };
if (write(twb->fd, cmd, sizeof(cmd)) != sizeof(cmd))
return -1;
return (read(twb->fd, buffer, size) != size);
}
static int twb_write_memory(struct twiboot *twb, uint8_t *buffer, uint8_t size, uint8_t memtype, uint16_t address)
{
int bufsize;
if (memtype == MEMTYPE_FLASH) {
if ((address & (twb->pagesize -1)) != 0x00) {
fprintf(stderr, "twb_write_memory(): address 0x%04x not aligned to pagesize 0x%02x\n", address, twb->pagesize);
return -1;
}
bufsize = 4 + twb->pagesize;
} else {
bufsize = 4 + size;
}
uint8_t *cmd = malloc(bufsize);
if (cmd == NULL)
return -1;
cmd[0] = CMD_WRITE_MEMORY;
cmd[1] = memtype;
cmd[2] = (address >> 8) & 0xFF;
cmd[3] = (address & 0xFF);
memcpy(cmd +4, buffer, size);
if (memtype == MEMTYPE_FLASH) {
memset(cmd +4 +size, 0xFF, twb->pagesize - size);
}
int result = write(twb->fd, cmd, bufsize);
free(cmd);
return (result != bufsize);
}
static void twb_close_device(struct twiboot *twb)
{
if (twb->connected)
close(twb->fd);
if (twb->device != NULL)
free(twb->device);
twb->device = NULL;
}
static int twb_open_device(struct twiboot *twb)
{
twb->fd = open(twb->device, O_RDWR);
if (twb->fd < 0) {
fprintf(stderr, "failed to open '%s': %s\n", twb->device, strerror(errno));
return -1;
}
unsigned long funcs;
if (ioctl(twb->fd, I2C_FUNCS, &funcs)) {
perror("ioctl(I2C_FUNCS)");
close(twb->fd);
return -1;
}
if (!(funcs & I2C_FUNC_I2C)) {
fprintf(stderr, "I2C_FUNC_I2C not supported on '%s'!\n", twb->device);
close(twb->fd);
return -1;
}
if (ioctl(twb->fd, I2C_SLAVE, twb->address) < 0) {
fprintf(stderr, "failed to select slave address '%d': %s\n", twb->address, strerror(errno));
close(twb->fd);
return -1;
}
twb->connected = 1;
return 0;
}
int twb_close(struct twiboot *twb)
{
if (twb->connected)
twb_switch_application(twb, BOOTTYPE_APPLICATION);
twb_close_device(twb);
return 0;
}
int twb_open(struct twiboot *twb)
{
if (twb_open_device(twb) != 0)
return -1;
if (twb_switch_application(twb, BOOTTYPE_BOOTLOADER)) {
fprintf(stderr, "failed to switch to bootloader (invalid address?): %s\n", strerror(errno));
twb_close(twb);
return -1;
}
if (twb_read_version(twb)) {
fprintf(stderr, "failed to get bootloader version: %s\n", strerror(errno));
twb_close(twb);
return -1;
}
uint8_t chipinfo[8];
if (twb_read_memory(twb, chipinfo, sizeof(chipinfo), MEMTYPE_CHIPINFO, 0x0000)) {
fprintf(stderr, "failed to get chipinfo: %s\n", strerror(errno));
twb_close(twb);
return -1;
}
memcpy(twb->signature, chipinfo, sizeof(twb->signature));
twb->pagesize = chipinfo[3];
twb->flashsize = (chipinfo[4] << 8) + chipinfo[5];
twb->eepromsize = (chipinfo[6] << 8) + chipinfo[7];
return 0;
}
int twb_read(struct twiboot *twb, struct databuf *dbuf, int memtype)
{
int pos = 0;
int size = (memtype == MEMTYPE_FLASH) ? twb->flashsize : twb->eepromsize;
while (pos < size) {
if (twb->progress_cb)
twb->progress_cb(twb->progress_msg, pos, size);
int len = MIN(READ_BLOCK_SIZE, size - pos);
if (twb_read_memory(twb, dbuf->data + pos, len, memtype, pos)) {
if (twb->progress_cb)
twb->progress_cb(twb->progress_msg, -1, -1);
return -1;
}
pos += len;
}
if (twb->progress_cb)
twb->progress_cb(twb->progress_msg, pos, size);
dbuf->length = pos;
return 0;
}
int twb_write(struct twiboot *twb, struct databuf *dbuf, int memtype)
{
int pos = 0;
while (pos < dbuf->length) {
if (twb->progress_cb)
twb->progress_cb(twb->progress_msg, pos, dbuf->length);
int len = (memtype == MEMTYPE_FLASH) ? twb->pagesize : WRITE_BLOCK_SIZE;
len = MIN(len, dbuf->length - pos);
if (twb_write_memory(twb, dbuf->data + pos, len, memtype, pos)) {
if (twb->progress_cb)
twb->progress_cb(twb->progress_msg, -1, -1);
return -1;
}
pos += len;
}
if (twb->progress_cb)
twb->progress_cb(twb->progress_msg, pos, dbuf->length);
return 0;
}
int twb_verify(struct twiboot *twb, struct databuf *dbuf, int memtype)
{
int pos = 0;
int size = (memtype == MEMTYPE_FLASH) ? twb->flashsize : twb->eepromsize;
uint8_t comp[READ_BLOCK_SIZE];
while (pos < size) {
if (twb->progress_cb)
twb->progress_cb(twb->progress_msg, pos, size);
int len = MIN(READ_BLOCK_SIZE, size - pos);
if (twb_read_memory(twb, comp, len, memtype, pos)) {
if (twb->progress_cb)
twb->progress_cb(twb->progress_msg, -1, -1);
return -1;
}
if (memcmp(comp, dbuf->data + pos, len) != 0x00) {
if (twb->progress_cb)
twb->progress_cb(twb->progress_msg, -1, -1);
fprintf(stderr, "verify failed at page 0x%04x!!\n", pos);
return -1;
}
pos += len;
}
if (twb->progress_cb)
twb->progress_cb(twb->progress_msg, pos, size);
dbuf->length = pos;
return 0;
}

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/***************************************************************************
* Copyright (C) 10/2010 by Olaf Rempel *
* razzor@kopf-tisch.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; version 2 of the License, *
* *
* 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <getopt.h>
#include "list.h"
#include "twiboot.h"
#define OP_READ 0x01
#define OP_WRITE 0x02
struct operation {
struct list_head list;
char *filename;
int flags;
int mode;
int memtype;
};
static LIST_HEAD(operation_list);
static struct option opts[] = {
{"address", 1, 0, 'a'}, // -a <addr>
{"device", 1, 0, 'd'}, // [ -d <device> ]
{"help", 0, 0, 'h'}, // [ -h ]
{"no-progress", 0, 0, 'p'}, // [ -p ]
{"read", 1, 0, 'r'}, // [ -r <flash|eeprom>:<file.hex> ]
{"write", 1, 0, 'w'}, // [ -w <flash|eeprom>:<file.hex> ]
{"no-verify", 0, 0, 'n'}, // [ -n ]
{0, 0, 0, 0}
};
static struct operation * alloc_operation(const char *arg)
{
struct operation *op = malloc(sizeof(struct operation));
if (op == NULL) {
perror("malloc()");
return NULL;
}
if (strncmp(arg, "flash:", 6) == 0) {
op->memtype = DATATYPE_FLASH;
op->filename = strdup(arg + 6);
} else if (strncmp(arg, "eeprom:", 7) == 0) {
op->memtype = DATATYPE_EEPROM;
op->filename = strdup(arg + 7);
} else {
fprintf(stderr, "invalid memtype: '%s'\n", arg);
return NULL;
}
return op;
}
static char * check_signature(uint8_t *sig)
{
if (sig[0] == 0x1E && sig[1] == 0x93 && sig[2] == 0x07)
return "AVR Mega 8";
if (sig[0] == 0x1E && sig[1] == 0x93 && sig[2] == 0x0A)
return "AVR Mega 88";
if (sig[0] == 0x1E && sig[1] == 0x94 && sig[2] == 0x06)
return "AVR Mega 168";
return "unknown";
}
static void progress_cb(const char *msg, int pos, int size)
{
if (pos != -1 && size != -1) {
char stars[50];
int i;
for (i = 0; i < sizeof(stars); i++)
stars[i] = ((pos * 100 / size) >= (i * 100 / sizeof(stars))) ? '*' : ' ';
printf("%-14s: [%s] (%d)\r", msg, stars, pos);
}
if (pos == size)
printf("\n");
}
int main(int argc, char *argv[])
{
struct twiboot twb;
int verify = 1, progress = 1;
memset(&twb, 0, sizeof(struct twiboot));
int arg = 0, code = 0, abort = 0;
while (code != -1) {
code = getopt_long(argc, argv, "a:d:hnpr:w:", opts, &arg);
switch (code) {
case 'a': /* address */
{
char *endptr;
twb.address = strtol(optarg, &endptr, 16);
if (*endptr != '\0' || twb.address < 0x01 || twb.address > 0x7F) {
fprintf(stderr, "invalid address: '%s'\n", optarg);
abort = 1;
break;
}
break;
}
case 'd': /* device */
if (twb.device != NULL) {
fprintf(stderr, "invalid device: '%s'\n", optarg);
abort = 1;
break;
}
twb.device = strdup(optarg);
if (twb.device == NULL) {
perror("strdup()");
abort = 1;
break;
}
break;
case 'r': /* read */
{
struct operation *op = alloc_operation(optarg);
if (op != NULL) {
op->mode = OP_READ;
list_add_tail(&op->list, &operation_list);
} else {
abort = 1;
}
break;
}
case 'w': /* write */
{
struct operation *op = alloc_operation(optarg);
if (op != NULL) {
op->mode = OP_WRITE;
list_add_tail(&op->list, &operation_list);
} else {
abort = 1;
}
break;
}
case 'n': /* no verify */
verify = 0;
break;
case 'p': /* no progress */
progress = 0;
break;
case 'h':
case '?': /* error */
fprintf(stderr, "Usage: twiboot [options]\n"
" -a <address> - selects i2c address (0x01 - 0x7F)\n"
" -d <device> - selects i2c device (default: /dev/i2c-0)\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 - disable progress bars\n"
"\n"
"Example: twiboot -a 0x22 -w flash:blmc.hex -w flash:blmc_eeprom.hex\n"
"\n");
abort = 1;
break;
default: /* unknown / all options parsed */
break;
}
}
if (twb.address == 0) {
fprintf(stderr, "abort: no address given\n");
abort = 1;
}
if (twb.device == NULL) {
twb.device = strdup("/dev/i2c-0");
if (twb.device == NULL) {
perror("strdup()");
abort = 1;
}
}
if (!abort) {
if (twb_open(&twb) != 0x00)
abort = 1;
}
if (!abort) {
printf("device : %-16s (address: 0x%02x)\n", twb.device, twb.address);
printf("version : %-16s (sig: 0x%02x 0x%02x 0x%02x => %s)\n", twb.version, twb.signature[0], twb.signature[1], twb.signature[2], check_signature(twb.signature));
printf("flash size : 0x%04x (0x%02x bytes/page)\n", twb.flashsize, twb.pagesize);
printf("eeprom size : 0x%04x\n", twb.eepromsize);
if (progress) {
setbuf(stdout, NULL);
twb.progress_cb = progress_cb;
}
struct operation *op;
list_for_each_entry(op, &operation_list, list) {
abort = 1;
if (op->mode == OP_READ) {
struct databuf *dbuf;
int result;
if (op->memtype == DATATYPE_FLASH) {
twb.progress_msg = "reading flash";
result = dbuf_alloc(&dbuf, twb.flashsize);
} else if (op->memtype == DATATYPE_EEPROM) {
twb.progress_msg = "reading eeprom";
result = dbuf_alloc(&dbuf, twb.eepromsize);
}
if (result != 0x00)
break;
result = twb_read(&twb, dbuf, op->memtype);
if (result != 0x00) {
fprintf(stderr, "failed to read from device\n");
dbuf_free(dbuf);
break;
}
result = file_write(op->filename, dbuf);
if (result != 0x00) {
fprintf(stderr, "failed to write file '%s'\n", op->filename);
dbuf_free(dbuf);
break;
}
dbuf_free(dbuf);
} else if (op->mode == OP_WRITE) {
struct databuf *dbuf;
unsigned int size;
int result;
result = file_getsize(op->filename, &size);
if (result != 0x00)
break;
result = dbuf_alloc(&dbuf, size);
if (result != 0x00)
break;
result = file_read(op->filename, dbuf);
if (result != 0x00) {
fprintf(stderr, "failed to read file '%s'\n", op->filename);
dbuf_free(dbuf);
break;
}
if (op->memtype == DATATYPE_FLASH) {
twb.progress_msg = "writing flash";
if (dbuf->length > twb.flashsize) {
fprintf(stderr, "invalid flash size: 0x%04x > 0x%04x\n", dbuf->length, twb.flashsize);
dbuf_free(dbuf);
break;
}
} else if (op->memtype == DATATYPE_EEPROM) {
twb.progress_msg = "writing eeprom";
if (dbuf->length > twb.eepromsize) {
fprintf(stderr, "invalid eeprom size: 0x%04x > 0x%04x\n", dbuf->length, twb.eepromsize);
dbuf_free(dbuf);
break;
}
}
result = twb_write(&twb, dbuf, op->memtype);
if (result != 0x00) {
fprintf(stderr, "failed to write to device\n");
dbuf_free(dbuf);
break;
}
if (verify) {
if (op->memtype == DATATYPE_FLASH) {
twb.progress_msg = "verifing flash";
} else if (op->memtype == DATATYPE_EEPROM) {
twb.progress_msg = "verifing eeprom";
}
result = twb_verify(&twb, dbuf, op->memtype);
if (result != 0) {
fprintf(stderr, "failed to verify\n");
dbuf_free(dbuf);
break;
}
}
dbuf_free(dbuf);
}
abort = 0;
}
}
struct operation *op, *tmp;
list_for_each_entry_safe(op, tmp, &operation_list, list) {
free(op->filename);
free(op);
}
twb_close(&twb);
return abort;
}

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#ifndef _TWIBOOT_H_
#define _TWIBOOT_H_
#include <stdint.h>
struct databuf {
uint32_t size; // allocation size
uint32_t length; // used size
uint8_t data[0];
};
int dbuf_alloc(struct databuf **dbuf, uint32_t size);
void dbuf_free(struct databuf *dbuf);
int file_getsize(const char *filename, uint32_t *size);
int file_read(const char *filename, struct databuf *dbuf);
int file_write(const char *filename, struct databuf *dbuf);
struct twiboot {
char *device;
uint8_t address;
int fd;
int connected;
char version[16];
uint8_t signature[3];
uint8_t pagesize;
uint16_t flashsize;
uint16_t eepromsize;
void (* progress_cb)(const char *msg, int pos, int max);
char *progress_msg;
};
int twb_open(struct twiboot *twb);
int twb_close(struct twiboot *twb);
#define DATATYPE_FLASH 0x01
#define DATATYPE_EEPROM 0x02
int twb_read(struct twiboot *twb, struct databuf *dbuf, int memtype);
int twb_verify(struct twiboot *twb, struct databuf *dbuf, int memtype);
int twb_write(struct twiboot *twb, struct databuf *dbuf, int memtype);
#endif /* _TWIBOOT_H_ */