blob: 3fddbbbac55f3dbf6845d1ed5c8361cd3d12ab5f [file] [log] [blame]
/* Copyright 2013 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Mock I2C driver for unit test.
*/
#include "hooks.h"
#include "i2c.h"
#include "i2c_private.h"
#include "link_defs.h"
#include "test_util.h"
#define MAX_DETACHED_DEV_COUNT 3
struct i2c_dev {
int port;
uint16_t addr_flags;
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(const int port, const uint16_t addr_flags)
{
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].addr_flags = addr_flags;
detached_devs[i].valid = 1;
return EC_SUCCESS;
}
int test_attach_i2c(const int port, const uint16_t addr_flags)
{
int i;
for (i = 0; i < MAX_DETACHED_DEV_COUNT; ++i)
if (detached_devs[i].valid && detached_devs[i].port == port &&
detached_devs[i].addr_flags == addr_flags)
break;
if (i == MAX_DETACHED_DEV_COUNT)
return EC_ERROR_INVAL;
detached_devs[i].valid = 0;
return EC_SUCCESS;
}
static int test_check_detached(const int port, const uint16_t addr_flags)
{
int i;
for (i = 0; i < MAX_DETACHED_DEV_COUNT; ++i)
if (detached_devs[i].valid && detached_devs[i].port == port &&
detached_devs[i].addr_flags == addr_flags)
return 1;
return 0;
}
int chip_i2c_xfer(const int port, const uint16_t addr_flags, const uint8_t *out,
int out_size, uint8_t *in, int in_size, int flags)
{
const struct test_i2c_xfer *p;
int rv;
if (test_check_detached(port, addr_flags))
return EC_ERROR_UNKNOWN;
for (p = __test_i2c_xfer; p < __test_i2c_xfer_end; ++p) {
rv = p->routine(port, addr_flags, out, out_size, in, in_size,
flags);
if (rv != EC_ERROR_INVAL)
return rv;
}
return EC_ERROR_UNKNOWN;
}
int chip_i2c_set_freq(int port, enum i2c_freq freq)
{
return EC_ERROR_UNIMPLEMENTED;
}
enum i2c_freq chip_i2c_get_freq(int port)
{
switch (i2c_ports[port].kbps) {
case 1000:
return I2C_FREQ_1000KHZ;
case 400:
return I2C_FREQ_400KHZ;
case 100:
return I2C_FREQ_100KHZ;
}
/* fallback to 100k */
return I2C_FREQ_100KHZ;
}
int i2c_raw_get_scl(int port)
{
return 1;
}
int i2c_raw_get_sda(int port)
{
return 1;
}
int i2c_get_line_levels(int port)
{
return 0;
}
void i2c_init(void)
{
/* We don't actually need to initialize anything here for host tests */
}