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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2016 Intel Corp.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#define __SIMPLE_DEVICE__
#include <assert.h>
#include <console/console.h>
#include <device/i2c_simple.h>
#include <soc/pci_devs.h>
#include <soc/reg_access.h>
#include "reg_access.h"
static uint64_t reg_read(struct reg_script_context *ctx)
{
int ret_code;
const struct reg_script *step;
uint8_t value = 0;
step = ctx->step;
switch (step->id) {
default:
printk(BIOS_ERR,
"ERROR - Unknown register set (0x%08x)!\n",
step->id);
ctx->display_features = REG_SCRIPT_DISPLAY_NOTHING;
break;
case GEN1_I2C_GPIO_EXP_0x20:
case GEN1_I2C_GPIO_EXP_0x21:
case GEN2_I2C_GPIO_EXP0:
case GEN2_I2C_GPIO_EXP1:
case GEN2_I2C_GPIO_EXP2:
case GEN2_I2C_LED_PWM:
if (ctx->display_features)
printk(BIOS_INFO, "I2C chip 0x%02x: ", step->id);
ret_code = i2c_readb(0, step->id, (uint8_t)step->reg, &value);
ASSERT(ret_code == 2);
break;
}
return value;
}
static void reg_write(struct reg_script_context *ctx)
{
int ret_code;
const struct reg_script *step;
uint8_t value;
step = ctx->step;
switch (step->id) {
default:
printk(BIOS_ERR,
"ERROR - Unknown register set (0x%08x)!\n",
step->id);
ctx->display_features = REG_SCRIPT_DISPLAY_NOTHING;
break;
case GEN1_I2C_GPIO_EXP_0x20:
case GEN1_I2C_GPIO_EXP_0x21:
case GEN2_I2C_GPIO_EXP0:
case GEN2_I2C_GPIO_EXP1:
case GEN2_I2C_GPIO_EXP2:
case GEN2_I2C_LED_PWM:
case RMU_TEMP_REGS:
if (ctx->display_features)
printk(BIOS_INFO, "I2C chip 0x%02x: ", step->id);
value = (uint8_t)step->value;
ret_code = i2c_writeb(0, step->id, (uint8_t)step->reg, value);
ASSERT(ret_code == 2);
break;
}
}
const struct reg_script_bus_entry mainboard_reg_script_bus_table = {
MAINBOARD_TYPE, reg_read, reg_write
};
REG_SCRIPT_BUS_ENTRY(mainboard_reg_script_bus_table);
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