| /* 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); |
| } |