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/*
* Copyright (c) 2019 Vestas Wind Systems A/S
* Copyright (c) 2021 Lemonbeat GmbH
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
* @brief EEPROM shell commands.
*/
#include <zephyr/shell/shell.h>
#include <zephyr/drivers/eeprom.h>
#include <stdlib.h>
struct args_index {
uint8_t device;
uint8_t offset;
uint8_t length;
uint8_t data;
uint8_t pattern;
};
static const struct args_index args_indx = {
.device = 1,
.offset = 2,
.length = 3,
.data = 3,
.pattern = 4,
};
static int cmd_read(const struct shell *shell, size_t argc, char **argv)
{
const struct device *eeprom;
size_t addr;
size_t len;
size_t pending;
size_t upto;
int err;
addr = strtoul(argv[args_indx.offset], NULL, 0);
len = strtoul(argv[args_indx.length], NULL, 0);
eeprom = device_get_binding(argv[args_indx.device]);
if (!eeprom) {
shell_error(shell, "EEPROM device not found");
return -EINVAL;
}
shell_print(shell, "Reading %zu bytes from EEPROM, offset %zu...", len,
addr);
for (upto = 0; upto < len; upto += pending) {
uint8_t data[SHELL_HEXDUMP_BYTES_IN_LINE];
pending = MIN(len - upto, SHELL_HEXDUMP_BYTES_IN_LINE);
err = eeprom_read(eeprom, addr, data, pending);
if (err) {
shell_error(shell, "EEPROM read failed (err %d)", err);
return err;
}
shell_hexdump_line(shell, addr, data, pending);
addr += pending;
}
shell_print(shell, "");
return 0;
}
static int cmd_write(const struct shell *shell, size_t argc, char **argv)
{
uint8_t wr_buf[CONFIG_EEPROM_SHELL_BUFFER_SIZE];
uint8_t rd_buf[CONFIG_EEPROM_SHELL_BUFFER_SIZE];
const struct device *eeprom;
unsigned long byte;
off_t offset;
size_t len;
int err;
int i;
offset = strtoul(argv[args_indx.offset], NULL, 0);
len = argc - args_indx.data;
if (len > sizeof(wr_buf)) {
shell_error(shell, "Write buffer size (%zu bytes) exceeded",
sizeof(wr_buf));
return -EINVAL;
}
for (i = 0; i < len; i++) {
byte = strtoul(argv[args_indx.data + i], NULL, 0);
if (byte > UINT8_MAX) {
shell_error(shell, "Error parsing data byte %d", i);
return -EINVAL;
}
wr_buf[i] = byte;
}
eeprom = device_get_binding(argv[args_indx.device]);
if (!eeprom) {
shell_error(shell, "EEPROM device not found");
return -EINVAL;
}
shell_print(shell, "Writing %zu bytes to EEPROM...", len);
err = eeprom_write(eeprom, offset, wr_buf, len);
if (err) {
shell_error(shell, "EEPROM write failed (err %d)", err);
return err;
}
shell_print(shell, "Verifying...");
err = eeprom_read(eeprom, offset, rd_buf, len);
if (err) {
shell_error(shell, "EEPROM read failed (err %d)", err);
return err;
}
if (memcmp(wr_buf, rd_buf, len) != 0) {
shell_error(shell, "Verify failed");
return -EIO;
}
shell_print(shell, "Verify OK");
return 0;
}
static int cmd_size(const struct shell *shell, size_t argc, char **argv)
{
const struct device *eeprom;
eeprom = device_get_binding(argv[args_indx.device]);
if (!eeprom) {
shell_error(shell, "EEPROM device not found");
return -EINVAL;
}
shell_print(shell, "%zu bytes", eeprom_get_size(eeprom));
return 0;
}
static int cmd_fill(const struct shell *shell, size_t argc, char **argv)
{
uint8_t wr_buf[CONFIG_EEPROM_SHELL_BUFFER_SIZE];
uint8_t rd_buf[CONFIG_EEPROM_SHELL_BUFFER_SIZE];
const struct device *eeprom;
unsigned long pattern;
size_t addr;
size_t initial_offset;
size_t len;
size_t pending;
size_t upto;
int err;
initial_offset = strtoul(argv[args_indx.offset], NULL, 0);
len = strtoul(argv[args_indx.length], NULL, 0);
pattern = strtoul(argv[args_indx.pattern], NULL, 0);
if (pattern > UINT8_MAX) {
shell_error(shell, "Error parsing pattern byte");
return -EINVAL;
}
memset(wr_buf, pattern, MIN(len, CONFIG_EEPROM_SHELL_BUFFER_SIZE));
eeprom = device_get_binding(argv[args_indx.device]);
if (!eeprom) {
shell_error(shell, "EEPROM device not found");
return -EINVAL;
}
shell_print(shell, "Writing %zu bytes of 0x%02lx to EEPROM...", len,
pattern);
addr = initial_offset;
for (upto = 0; upto < len; upto += pending) {
pending = MIN(len - upto, CONFIG_EEPROM_SHELL_BUFFER_SIZE);
err = eeprom_write(eeprom, addr, wr_buf, pending);
if (err) {
shell_error(shell, "EEPROM write failed (err %d)", err);
return err;
}
addr += pending;
}
addr = initial_offset;
shell_print(shell, "Verifying...");
for (upto = 0; upto < len; upto += pending) {
pending = MIN(len - upto, CONFIG_EEPROM_SHELL_BUFFER_SIZE);
err = eeprom_read(eeprom, addr, rd_buf, pending);
if (err) {
shell_error(shell, "EEPROM read failed (err %d)", err);
return err;
}
if (memcmp(wr_buf, rd_buf, pending) != 0) {
shell_error(shell, "Verify failed");
return -EIO;
}
addr += pending;
}
shell_print(shell, "Verify OK");
return 0;
}
/* Device name autocompletion support */
static void device_name_get(size_t idx, struct shell_static_entry *entry)
{
const struct device *dev = shell_device_lookup(idx, NULL);
entry->syntax = (dev != NULL) ? dev->name : NULL;
entry->handler = NULL;
entry->help = NULL;
entry->subcmd = NULL;
}
SHELL_DYNAMIC_CMD_CREATE(dsub_device_name, device_name_get);
SHELL_STATIC_SUBCMD_SET_CREATE(eeprom_cmds,
SHELL_CMD_ARG(read, &dsub_device_name,
"<device> <offset> <length>", cmd_read, 4, 0),
SHELL_CMD_ARG(write, &dsub_device_name,
"<device> <offset> [byte0] <byte1> .. <byteN>", cmd_write,
4, CONFIG_EEPROM_SHELL_BUFFER_SIZE - 1),
SHELL_CMD_ARG(size, &dsub_device_name, "<device>", cmd_size, 2, 0),
SHELL_CMD_ARG(fill, &dsub_device_name,
"<device> <offset> <length> <pattern>", cmd_fill, 5, 0),
SHELL_SUBCMD_SET_END
);
SHELL_CMD_REGISTER(eeprom, &eeprom_cmds, "EEPROM shell commands", NULL);