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/* Copyright 2017 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* I2C module driver depends on chip series for Chrome EC */
#include "common.h"
#include "i2c.h"
#include "i2c_chip.h"
#include "registers.h"
#include "util.h"
/*****************************************************************************/
/* IC specific low-level driver depends on chip series */
int i2c_port_to_controller(int port)
{
if (port < 0 || port >= I2C_PORT_COUNT)
return -1;
if (port <= NPCX_I2C_PORT3_0)
return port;
#ifndef NPCX_PSL_MODE_SUPPORT
else if (port == NPCX_I2C_PORT4_0)
return 4;
#endif
else /* If port >= NPCX_I2C_PORT4_1 */
return 4 + ((port - NPCX_I2C_PORT4_1 + 1) / 2);
}
void i2c_select_port(int port)
{
/* Only I2C 4/5/6 have multiple ports in series npcx7 */
if (port <= NPCX_I2C_PORT3_0 || port >= NPCX_I2C_PORT7_0)
return;
/* Select I2C ports for the same controller */
else if (port <= NPCX_I2C_PORT4_1) {
UPDATE_BIT(NPCX_GLUE_SMBSEL, NPCX_SMBSEL_SMB4SEL,
(port == NPCX_I2C_PORT4_1));
} else if (port <= NPCX_I2C_PORT5_1) {
UPDATE_BIT(NPCX_GLUE_SMBSEL, NPCX_SMBSEL_SMB5SEL,
(port == NPCX_I2C_PORT5_1));
} else {
UPDATE_BIT(NPCX_GLUE_SMBSEL, NPCX_SMBSEL_SMB6SEL,
(port == NPCX_I2C_PORT6_1));
}
}
int i2c_is_raw_mode(int port)
{
int group, bit;
if (port == NPCX_I2C_PORT4_1 || port == NPCX_I2C_PORT5_1 ||
port == NPCX_I2C_PORT6_1) {
group = 6;
bit = 7 - (port - NPCX_I2C_PORT4_1) / 2;
} else {
group = 2;
if (port <= NPCX_I2C_PORT3_0)
bit = 2 * port;
else
bit = I2C_PORT_COUNT - port;
}
if (IS_BIT_SET(NPCX_DEVALT(group), bit))
return 0;
else
return 1;
}
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