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/* Copyright (c) 2013 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.
*
* Dummy I2C driver for unit test.
*/
#include "hooks.h"
#include "i2c.h"
#include "link_defs.h"
#include "test_util.h"
#define MAX_DETACHED_DEV_COUNT 3
struct i2c_dev {
int port;
int slave_addr;
int valid;
};
static struct i2c_dev detached_devs[MAX_DETACHED_DEV_COUNT];
static void detach_init(void)
{
int i;
for (i = 0; i < MAX_DETACHED_DEV_COUNT; ++i)
detached_devs[i].valid = 0;
}
DECLARE_HOOK(HOOK_INIT, detach_init, HOOK_PRIO_FIRST);
int test_detach_i2c(int port, int slave_addr)
{
int i;
for (i = 0; i < MAX_DETACHED_DEV_COUNT; ++i)
if (detached_devs[i].valid == 0)
break;
if (i == MAX_DETACHED_DEV_COUNT)
return EC_ERROR_OVERFLOW;
detached_devs[i].port = port;
detached_devs[i].slave_addr = slave_addr;
detached_devs[i].valid = 1;
return EC_SUCCESS;
}
int test_attach_i2c(int port, int slave_addr)
{
int i;
for (i = 0; i < MAX_DETACHED_DEV_COUNT; ++i)
if (detached_devs[i].valid &&
detached_devs[i].port == port &&
detached_devs[i].slave_addr == slave_addr)
break;
if (i == MAX_DETACHED_DEV_COUNT)
return EC_ERROR_INVAL;
detached_devs[i].valid = 0;
return EC_SUCCESS;
}
static int test_check_detached(int port, int slave_addr)
{
int i;
for (i = 0; i < MAX_DETACHED_DEV_COUNT; ++i)
if (detached_devs[i].valid &&
detached_devs[i].port == port &&
detached_devs[i].slave_addr == slave_addr)
return 1;
return 0;
}
int i2c_read16(int port, int slave_addr, int offset, int *data)
{
const struct test_i2c_read_dev *p;
int rv;
if (test_check_detached(port, slave_addr))
return EC_ERROR_UNKNOWN;
for (p = __test_i2c_read16; p < __test_i2c_read16_end; ++p) {
rv = p->routine(port, slave_addr, offset, data);
if (rv != EC_ERROR_INVAL)
return rv;
}
return EC_ERROR_UNKNOWN;
}
int i2c_write16(int port, int slave_addr, int offset, int data)
{
const struct test_i2c_write_dev *p;
int rv;
if (test_check_detached(port, slave_addr))
return EC_ERROR_UNKNOWN;
for (p = __test_i2c_write16; p < __test_i2c_write16_end; ++p) {
rv = p->routine(port, slave_addr, offset, data);
if (rv != EC_ERROR_INVAL)
return rv;
}
return EC_ERROR_UNKNOWN;
}
int i2c_read8(int port, int slave_addr, int offset, int *data)
{
const struct test_i2c_read_dev *p;
int rv;
if (test_check_detached(port, slave_addr))
return EC_ERROR_UNKNOWN;
for (p = __test_i2c_read8; p < __test_i2c_read8_end; ++p) {
rv = p->routine(port, slave_addr, offset, data);
if (rv != EC_ERROR_INVAL)
return rv;
}
return EC_ERROR_UNKNOWN;
}
int i2c_write8(int port, int slave_addr, int offset, int data)
{
const struct test_i2c_write_dev *p;
int rv;
if (test_check_detached(port, slave_addr))
return EC_ERROR_UNKNOWN;
for (p = __test_i2c_write8; p < __test_i2c_write8_end; ++p) {
rv = p->routine(port, slave_addr, offset, data);
if (rv != EC_ERROR_INVAL)
return rv;
}
return EC_ERROR_UNKNOWN;
}
int i2c_read_string(int port, int slave_addr, int offset, uint8_t *data,
int len)
{
const struct test_i2c_read_string_dev *p;
int rv;
if (test_check_detached(port, slave_addr))
return EC_ERROR_UNKNOWN;
for (p = __test_i2c_read_string; p < __test_i2c_read_string_end; ++p) {
rv = p->routine(port, slave_addr, offset, data, len);
if (rv != EC_ERROR_INVAL)
return rv;
}
return EC_ERROR_UNKNOWN;
}
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