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/* SPDX-License-Identifier: GPL-2.0-only */
#include <device/pnp_ops.h>
#include "i2ec.h"
#define SIO_DEV PNP_DEV(0x2e, 0)
/* SIO depth 2 index/data pair */
#define D2ADR 0x2e
#define D2DAT 0x2f
/* SIO depth 2 address space */
#define I2EC_ADDR_L 0x10
#define I2EC_ADDR_H 0x11
#define I2EC_DATA 0x12
/*
* Read/write SIO "depth 2" registers
*/
static uint8_t sio_d2_read(uint8_t addr)
{
pnp_write_config(SIO_DEV, D2ADR, addr);
return pnp_read_config(SIO_DEV, D2DAT);
}
static void sio_d2_write(uint8_t addr, uint8_t val)
{
pnp_write_config(SIO_DEV, D2ADR, addr);
pnp_write_config(SIO_DEV, D2DAT, val);
}
/*
* Read/write I2EC registers through SIO "depth 2" address space
*/
uint8_t ec_d2i2ec_read(uint16_t addr)
{
sio_d2_write(I2EC_ADDR_H, addr >> 8 & 0xff);
sio_d2_write(I2EC_ADDR_L, addr & 0xff);
return sio_d2_read(I2EC_DATA);
}
void ec_d2i2ec_write(uint16_t addr, uint8_t val)
{
sio_d2_write(I2EC_ADDR_H, addr >> 8 & 0xff);
sio_d2_write(I2EC_ADDR_L, addr & 0xff);
sio_d2_write(I2EC_DATA, val);
}
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