/*
|
* drivers/spi/spi-slave-protocol.h
|
*
|
* Copyright (C) 2019 - Reuuimlla Limited
|
* Yihuasheng <yihuasheng@allwinnertech.com>
|
*
|
* SUNXI SPI Slave Protocol Definition
|
*
|
* This program is free software; you can redistribute it and/or
|
* modify it under the terms of the GNU General Public License as
|
* published by the Free Software Foundation; either version 2 of
|
* the License, or (at your option) any later version.
|
*/
|
|
/*
|
#define HEAD_LENGTH
|
#define OP_MASK 0
|
#define ADDR_MASK_0 1
|
#define ADDR_MASK_1 2
|
#define ADDR_MASK_2 3
|
#define LENGTH_MASK_0 4
|
#define LENGTH_MASK_1 5
|
#define LENGTH_MASK_2 6
|
#define SUNXI_OP_WRITE 0x01
|
#define SUNXI_OP_READ 0x03
|
*/
|
|
#define HEAD_LEN 5
|
#define PKT_MAX_LEN 0x40
|
#define STATUS_LEN 0x01
|
|
#define STATUS_WRITABLE 0x02
|
#define STATUS_NOTWRITABLE 0x03
|
#define STATUS_READABLE 0x04
|
|
#define OP_MASK 0
|
#define ADDR_MASK_0 1
|
#define ADDR_MASK_1 2
|
#define ADDR_MASK_2 3
|
#define LENGTH_MASK 4
|
#define SUNXI_OP_WRITE 0x01
|
#define SUNXI_OP_READ 0x03
|
|
|
|
struct sunxi_spi_slave_head {
|
int op_code;
|
int addr;
|
int len;
|
};
|
|
struct device_data {
|
unsigned char *tx_buf, *rx_buf;
|
unsigned char len; /* max len is 64 */
|
};
|
|
struct sunxi_slave {
|
struct sunxi_spi_slave_head *head;
|
struct device_data *data;
|
struct device_data *(*set_up_txdata)(struct sunxi_spi_slave_head *head);
|
};
|
