spi.h

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#ifndef CONSOLE_SPI_H
#define CONSOLE_SPI_H 1
 
#include <stdint.h>
 
void spiconsole_init(void);
void spiconsole_tx_byte(unsigned char c);
 
#define __CONSOLE_SPI_ENABLE__  (CONFIG(EM100PRO_SPI_CONSOLE) && \
        (ENV_RAMSTAGE || (ENV_SMM && CONFIG(DEBUG_SMI))))
 
#if __CONSOLE_SPI_ENABLE__
static inline void __spiconsole_init(void)      { spiconsole_init(); }
static inline void __spiconsole_tx_byte(u8 data)
{
        spiconsole_tx_byte(data);
}
#else
static inline void __spiconsole_init(void)      {}
static inline void __spiconsole_tx_byte(u8 data)        {}
#endif /* __CONSOLE_SPI_ENABLE__ */
 
#define MAX_MSG_LENGTH  128
 
#define EM100_DEDICATED_CMD     0x11
#define EM100_UFIFO_CMD         0xC0
#define EM100_MSG_SIGNATURE     0x47364440
 
enum em100_message_types {
        EM100_MSG_CHECKPOINT_1B = 0x01,
        EM100_MSG_CHECKPOINT_2B,
        EM100_MSG_CHECKPOINT_4B,
        EM100_MSG_HEX,
        EM100_MSG_ASCII,
        EM100_MSG_TIMESTAMP,
        EM100_MSG_LOOKUP
};
 
struct em100_msg_header {
        uint8_t         spi_command;
        uint8_t         reserved;
        uint8_t         em100_command;
        uint32_t        msg_signature;
        uint8_t         msg_type;
        uint8_t         msg_length;
} __packed;
 
struct em100_msg {
        struct em100_msg_header header;
        char data[MAX_MSG_LENGTH];
} __packed;
 
#endif /* CONSOLE_SPI_H */