src/ec/compal/ene932/ec.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 /*
   4  * EC communication interface for COMPAL ENE932 Embedded Controller.
   5  */
   6
   7 #ifndef _EC_COMPAL_ENE932_EC_H
   8 #define _EC_COMPAL_ENE932_EC_H
   9
  10 #include <stdint.h>
  11
  12 #define EC_IO 0xfd60 /* Mainboard specific. Could be Kconfig option */
  13 #define EC_IO_HIGH EC_IO + 1
  14 #define EC_IO_LOW  EC_IO + 2
  15 #define EC_IO_DATA EC_IO + 3
  16
  17 /* ENE EC internal address space */
  18 #define REG_SPI_DATA    0xfeab
  19 #define REG_SPI_COMMAND 0xfeac
  20 #define REG_SPI_CONFIG  0xfead
  21 #define CFG_CSn_FORCE_LOW        (1 << 4)
  22 #define CFG_COMMAND_WRITE_ENABLE (1 << 3)
  23 #define CFG_STATUS               (1 << 1)
  24
  25 #define KBD_DATA        0x60
  26 #define KBD_COMMAND     0x64
  27 #define KBD_STATUS      0x64
  28 #define   KBD_IBF       (1 << 1) // 1: input buffer full (data ready for ec)
  29 #define   KBD_OBF       (1 << 0) // 1: output buffer full (data ready for host)
  30
  31 /* Wait 400ms for keyboard controller answers */
  32 #define KBC_TIMEOUT_IN_MS 400
  33
  34 u8 ec_kbc_read_ob(void);
  35 void ec_kbc_write_cmd(u8 cmd);
  36 void ec_kbc_write_ib(u8 data);
  37 int kbc_cleanup_buffers(void);
  38
  39 #endif /* _EC_COMPAL_ENE932_EC_H */