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/*
* Copyright 2015 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* SPI transfer command for debugging SPI devices.
*/
#include "common.h"
#include "console.h"
#include "spi.h"
#include "timer.h"
#include "util.h"
static int command_spixfer(int argc, char **argv)
{
int dev_id;
uint8_t offset;
int v = 0;
uint8_t data[32];
char *e;
int rv = 0;
if (argc != 5)
return EC_ERROR_PARAM_COUNT;
dev_id = strtoi(argv[2], &e, 0);
if (*e)
return EC_ERROR_PARAM2;
offset = strtoi(argv[3], &e, 0);
if (*e)
return EC_ERROR_PARAM3;
v = strtoi(argv[4], &e, 0);
if (*e)
return EC_ERROR_PARAM4;
if (strcasecmp(argv[1], "rlen") == 0) {
uint8_t cmd = 0x80 | offset;
/* Arbitrary length read; param4 = len */
if (v < 0 || v > sizeof(data))
return EC_ERROR_PARAM4;
rv = spi_transaction(&spi_devices[dev_id], &cmd, 1, data, v);
if (!rv)
ccprintf("Data: %.*h\n", v, data);
} else if (strcasecmp(argv[1], "w") == 0) {
/* 8-bit write */
uint8_t cmd[2] = { offset, v };
rv = spi_transaction(&spi_devices[dev_id], cmd, 2, NULL, 0);
/*
* Some SPI device needs a delay before accepting other
* commands, otherwise the write might be ignored.
*/
msleep(1);
} else {
return EC_ERROR_PARAM1;
}
return rv;
}
DECLARE_CONSOLE_COMMAND(spixfer, command_spixfer,
"rlen/w id offset [value | len]",
"Read write spi. id is spi_devices array index");
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