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/* Copyright 2016 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.
*/
#include <string.h>
#include "common.h"
#include "cts_common.h"
#include "cts_i2c.h"
#include "i2c.h"
#include "registers.h"
#include "task.h"
#include "timer.h"
#include "uart.h"
#include "watchdog.h"
static uint8_t inbox[I2C_MAX_HOST_PACKET_SIZE + 2];
static char data_received;
void i2c_data_received(int port, uint8_t *buf, int len)
{
memcpy(inbox, buf, len);
data_received = 1;
}
/* CTS I2C protocol implementation */
int i2c_set_response(int port, uint8_t *buf, int len)
{
switch (buf[0]) {
case READ8_OFF:
buf[0] = READ8_DATA;
return 1;
case READ16_OFF:
buf[0] = READ16_DATA & 0xFF;
buf[1] = (READ16_DATA >> 8) & 0xFF;
return 2;
case READ32_OFF:
buf[0] = READ32_DATA & 0xFF;
buf[1] = (READ32_DATA >> 8) & 0xFF;
buf[2] = (READ32_DATA >> 16) & 0xFF;
buf[3] = (READ32_DATA >> 24) & 0xFF;
return 4;
default:
return 0;
}
}
static int wait_for_in_flag(uint32_t timeout_ms)
{
uint64_t start_time, end_time;
start_time = get_time().val;
end_time = start_time + timeout_ms * 1000;
while (get_time().val < end_time) {
if (data_received)
return 0;
msleep(5);
watchdog_reload();
}
return 1;
}
void clean_state(void)
{
memset(inbox, 0, sizeof(inbox));
data_received = 0;
}
enum cts_rc write8_test(void)
{
int in;
if (wait_for_in_flag(100))
return CTS_RC_TIMEOUT;
if (inbox[0] != WRITE8_OFF)
return CTS_RC_FAILURE;
in = inbox[1];
if (in != WRITE8_DATA)
return CTS_RC_FAILURE;
return CTS_RC_SUCCESS;
}
enum cts_rc write16_test(void)
{
int in;
if (wait_for_in_flag(100))
return CTS_RC_TIMEOUT;
if (inbox[0] != WRITE16_OFF)
return CTS_RC_FAILURE;
in = inbox[2] << 8 | inbox[1] << 0;
if (in != WRITE16_DATA)
return CTS_RC_FAILURE;
return CTS_RC_SUCCESS;
}
enum cts_rc write32_test(void)
{
int in;
if (wait_for_in_flag(100))
return CTS_RC_TIMEOUT;
if (inbox[0] != WRITE32_OFF)
return CTS_RC_FAILURE;
in = inbox[4] << 24 | inbox[3] << 16 | inbox[2] << 8 | inbox[1];
if (in != WRITE32_DATA)
return CTS_RC_FAILURE;
return CTS_RC_SUCCESS;
}
enum cts_rc read8_test(void)
{
if (wait_for_in_flag(100))
return CTS_RC_TIMEOUT;
if (inbox[0] != READ8_OFF)
return CTS_RC_FAILURE;
return CTS_RC_SUCCESS;
}
enum cts_rc read16_test(void)
{
if (wait_for_in_flag(100))
return CTS_RC_TIMEOUT;
if (inbox[0] != READ16_OFF)
return CTS_RC_FAILURE;
return CTS_RC_SUCCESS;
}
enum cts_rc read32_test(void)
{
if (wait_for_in_flag(100))
return CTS_RC_TIMEOUT;
if (inbox[0] != READ32_OFF)
return CTS_RC_FAILURE;
return CTS_RC_SUCCESS;
}
#include "cts_testlist.h"
void cts_task(void)
{
cts_main_loop(tests, "I2C");
task_wait_event(-1);
}
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