/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdint.h>
#include <fcntl.h>
#include <malloc.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdbool.h>
#include <time.h>
#include <errno.h>
#include "stm32_bl.h"
#include "stm32f4_crc.h"
#include "i2c.h"
#include "spi.h"
static inline size_t pad(ssize_t length)
{
return (length + 3) & ~3;
}
static inline size_t tot_len(ssize_t length)
{
// [TYPE:1] [LENGTH:3] [DATA] [PAD:0-3] [CRC:4]
return sizeof(uint32_t) + pad(length) + sizeof(uint32_t);
}
ssize_t write_byte(int fd, uint8_t byte)
{
ssize_t ret;
do {
ret = write(fd, &byte, 1);
} while (ret == 0 || (ret == -1 && errno == EINTR));
return ret;
}
int main(int argc, char *argv[])
{
uint8_t addr = 0x39;
char device[] = "/dev/spidev7.0";
int gpio_nreset = 59;
char gpio_dev[30];
struct stat buf;
uint8_t *buffer;
uint32_t crc;
i2c_handle_t i2c_handle;
spi_handle_t spi_handle;
handle_t *handle;
char options[] = "d:e:w:a:t:r:l:g:csi";
char *dev = device;
int opt;
uint32_t address = 0x08000000;
char *write_filename = NULL;
char *read_filename = NULL;
int sector = -1;
int do_crc = 0;
uint8_t type = 0x11;
ssize_t length = 0;
uint8_t ret;
bool use_spi = true;
int fd;
int gpio;
FILE *file;
int val;
struct timespec ts;
if (argc == 1) {
printf("Usage: %s\n", argv[0]);
printf(" -s (use spi. default)\n");
printf(" -i (use i2c)\n");
printf(" -g <gpio> (reset gpio. default: %d)\n", gpio_nreset);
printf(" -d <device> (device. default: %s)\n", device);
printf(" -e <sector> (sector to erase)\n");
printf(" -w <filename> (filename to write to flash)\n");
printf(" -r <filename> (filename to read from flash)\n");
printf(" -l <length> (length to read/write)\n");
printf(" -a <address> (address to write filename to. default: 0x%08x)\n",
address);
printf(" -c (add type, length, file contents, and CRC)\n");
printf(" -t <type> (type value for -c option. default: %d)\n", type);
return 0;
}
while ((opt = getopt(argc, argv, options)) != -1) {
switch (opt) {
case 'd':
dev = optarg;
break;
case 'e':
sector = strtol(optarg, NULL, 0);
break;
case 'w':
write_filename = optarg;
break;
case 'r':
read_filename = optarg;
break;
case 'l':
length = strtol(optarg, NULL, 0);
break;
case 'a':
address = strtol(optarg, NULL, 0);
break;
case 'c':
do_crc = 1;
break;
case 't':
type = strtol(optarg, NULL, 0);
break;
case 's':
use_spi = true;
break;
case 'i':
use_spi = false;
break;
case 'g':
gpio_nreset = strtol(optarg, NULL, 0);
break;
}
}
fd = open(dev, O_RDWR);
if (fd < 0) {
perror("Error opening dev");
return -1;
}
snprintf(gpio_dev, sizeof(gpio_dev), "/sys/class/gpio/gpio%d/value", gpio_nreset);
gpio = open(gpio_dev, O_WRONLY);
if (gpio < 0) {
perror("Error opening nreset gpio");
} else {
if (write_byte(gpio, '1') < 0)
perror("Failed to set gpio to 1");
close(gpio);
ts.tv_sec = 0;
ts.tv_nsec = 5000000;
nanosleep(&ts, NULL);
}
if (use_spi) {
handle = &spi_handle.handle;
spi_handle.fd = fd;
val = spi_init(handle);
} else {
handle = &i2c_handle.handle;
i2c_handle.fd = fd;
i2c_handle.addr = addr;
val = i2c_init(handle);
}
if (val < 0)
return val;
if (sector >= 0) {
printf("Erasing sector %d\n", sector);
ret = erase_sector(handle, sector);
if (ret == CMD_ACK)
printf("Erase succeeded\n");
else
printf("Erase failed\n");
}
if (write_filename != NULL) {
file = fopen(write_filename, "r");
if (!file) {
perror("Error opening input file");
return -1;
}
if (fstat(fileno(file), &buf) < 0) {
perror("error stating file");
return -1;
}
/*
* For CRC: (when writing to eedata/shared)
* [TYPE:1] [LENGTH:3] [DATA] [PAD:0-3] [CRC:4]
* Otherwise:
* [DATA]
*/
buffer = calloc(tot_len(buf.st_size), 1);
if (length == 0 || length > buf.st_size)
length = buf.st_size;
if (fread(&buffer[sizeof(uint32_t)], 1, length, file) < (size_t)length) {
perror("Error reading input file");
return -1;
}
printf("Writing %zd bytes from %s to 0x%08x\n", length,
write_filename, address);
if (do_crc) {
/* Populate TYPE, LENGTH, and CRC */
buffer[0] = type;
buffer[1] = (length >> 16) & 0xFF;
buffer[2] = (length >> 8) & 0xFF;
buffer[3] = (length ) & 0xFF;
crc = ~stm32f4_crc32(buffer, sizeof(uint32_t) + length);
memcpy(&buffer[sizeof(uint32_t) + pad(length)],
&crc, sizeof(uint32_t));
ret = write_memory(handle, address,
tot_len(length), buffer);
} else {
/* Skip over space reserved for TYPE and LENGTH */
ret = write_memory(handle, address,
length, &buffer[sizeof(uint32_t)]);
}
if (ret == CMD_ACK)
printf("Write succeeded\n");
else
printf("Write failed\n");
free(buffer);
fclose(file);
}
if (read_filename != NULL) {
file = fopen(read_filename, "w");
if (!file) {
perror("Error opening output file");
return -1;
}
if (length > 0) {
/* If passed in a length, just read that many bytes */
buffer = calloc(length, 1);
ret = read_memory(handle, address, length, buffer);
if (ret == CMD_ACK) {
if (fwrite(buffer, 1, length, file) < (size_t)length)
perror("Failed to write all read bytes to file");
printf("Read %zd bytes from %s @ 0x%08x\n",
length, read_filename, address);
} else {
printf("Read failed\n");
}
free(buffer);
} else if (do_crc) {
/* otherwise if crc specified, read type, length, data, and crc */
uint8_t tmp_buf[sizeof(uint32_t)];
ret = read_memory(handle, address, sizeof(uint32_t), tmp_buf);
if (ret == CMD_ACK) {
type = tmp_buf[0];
length = ((tmp_buf[1] << 16) & 0x00FF0000) |
((tmp_buf[2] << 8) & 0x0000FF00) |
((tmp_buf[3] ) & 0x000000FF);
if (type != 0xFF) {
buffer = calloc(tot_len(length), 1);
ret = read_memory(handle, address,
tot_len(length), buffer);
if (ret == CMD_ACK) {
crc = stm32f4_crc32(buffer, tot_len(length));
if (fwrite(buffer, 1, tot_len(length), file) < tot_len(length))
perror("Failed to write all read bytes to file");
printf("Read %zd bytes from %s @ 0x%08x (type %02x, crc %s)\n",
length, read_filename, address, type,
crc == STM32F4_CRC_RESIDUE ? "good" : "bad");
} else {
printf("Read of payload failed\n");
}
free(buffer);
} else {
printf("Read invalid type: 0xFF\n");
}
} else {
printf("Read of header failed\n");
}
} else {
printf("No length or crc specified for read\n");
}
fclose(file);
}
gpio = open(gpio_dev, O_WRONLY);
if (gpio < 0) {
perror("Error opening nreset gpio");
} else {
if (write_byte(gpio, '0') < 0)
perror("Failed to set gpio to 0");
close(gpio);
}
close(fd);
return 0;
}