src/include/console/spi.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #ifndef CONSOLE_SPI_H
   4 #define CONSOLE_SPI_H 1
   5
   6 #include <stdint.h>
   7
   8 void spiconsole_init(void);
   9 void spiconsole_tx_byte(unsigned char c);
  10
  11 #define __CONSOLE_SPI_ENABLE__  (CONFIG(EM100PRO_SPI_CONSOLE) && \
  12         (ENV_RAMSTAGE || (ENV_SMM && CONFIG(DEBUG_SMI))))
  13
  14 #if __CONSOLE_SPI_ENABLE__
  15 static inline void __spiconsole_init(void)      { spiconsole_init(); }
  16 static inline void __spiconsole_tx_byte(u8 data)
  17 {
  18         spiconsole_tx_byte(data);
  19 }
  20 #else
  21 static inline void __spiconsole_init(void)      {}
  22 static inline void __spiconsole_tx_byte(u8 data)        {}
  23 #endif /* __CONSOLE_SPI_ENABLE__ */
  24
  25 #define MAX_MSG_LENGTH  128
  26
  27 #define EM100_DEDICATED_CMD     0x11
  28 #define EM100_UFIFO_CMD         0xC0
  29 #define EM100_MSG_SIGNATURE     0x47364440
  30
  31 enum em100_message_types {
  32         EM100_MSG_CHECKPOINT_1B = 0x01,
  33         EM100_MSG_CHECKPOINT_2B,
  34         EM100_MSG_CHECKPOINT_4B,
  35         EM100_MSG_HEX,
  36         EM100_MSG_ASCII,
  37         EM100_MSG_TIMESTAMP,
  38         EM100_MSG_LOOKUP
  39 };
  40
  41 struct em100_msg_header {
  42         uint8_t         spi_command;
  43         uint8_t         reserved;
  44         uint8_t         em100_command;
  45         uint32_t        msg_signature;
  46         uint8_t         msg_type;
  47         uint8_t         msg_length;
  48 } __packed;
  49
  50 struct em100_msg {
  51         struct em100_msg_header header;
  52         char data[MAX_MSG_LENGTH];
  53 } __packed;
  54
  55 #endif /* CONSOLE_SPI_H */