src/ec/clevo/it5570e/i2ec.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <device/pnp_ops.h>
   4
   5 #include "i2ec.h"
   6
   7 #define SIO_DEV         PNP_DEV(0x2e, 0)
   8
   9 /* SIO depth 2 index/data pair */
  10 #define D2ADR           0x2e
  11 #define D2DAT           0x2f
  12
  13 /* SIO depth 2 address space */
  14 #define I2EC_ADDR_L     0x10
  15 #define I2EC_ADDR_H     0x11
  16 #define I2EC_DATA       0x12
  17
  18 /*
  19  * Read/write SIO "depth 2" registers
  20  */
  21
  22 static uint8_t sio_d2_read(uint8_t addr)
  23 {
  24         pnp_write_config(SIO_DEV, D2ADR, addr);
  25         return pnp_read_config(SIO_DEV, D2DAT);
  26 }
  27
  28 static void sio_d2_write(uint8_t addr, uint8_t val)
  29 {
  30         pnp_write_config(SIO_DEV, D2ADR, addr);
  31         pnp_write_config(SIO_DEV, D2DAT, val);
  32 }
  33
  34 /*
  35  * Read/write I2EC registers through SIO "depth 2" address space
  36  */
  37
  38 uint8_t ec_d2i2ec_read(uint16_t addr)
  39 {
  40         sio_d2_write(I2EC_ADDR_H, addr >> 8 & 0xff);
  41         sio_d2_write(I2EC_ADDR_L, addr      & 0xff);
  42         return sio_d2_read(I2EC_DATA);
  43 }
  44
  45 void ec_d2i2ec_write(uint16_t addr, uint8_t val)
  46 {
  47         sio_d2_write(I2EC_ADDR_H, addr >> 8 & 0xff);
  48         sio_d2_write(I2EC_ADDR_L, addr      & 0xff);
  49         sio_d2_write(I2EC_DATA, val);
  50 }