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Mini Shell
Mini Shell
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2018 MediaTek Inc.
*
*/
#ifndef __MTK_CMDQ_MAILBOX_H__
#define __MTK_CMDQ_MAILBOX_H__
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/types.h>
#define CMDQ_INST_SIZE 8 /* instruction is 64-bit */
#define CMDQ_SUBSYS_SHIFT 16
#define CMDQ_OP_CODE_SHIFT 24
#define CMDQ_JUMP_PASS CMDQ_INST_SIZE
#define CMDQ_WFE_UPDATE BIT(31)
#define CMDQ_WFE_UPDATE_VALUE BIT(16)
#define CMDQ_WFE_WAIT BIT(15)
#define CMDQ_WFE_WAIT_VALUE 0x1
/*
* WFE arg_b
* bit 0-11: wait value
* bit 15: 1 - wait, 0 - no wait
* bit 16-27: update value
* bit 31: 1 - update, 0 - no update
*/
#define CMDQ_WFE_OPTION (CMDQ_WFE_WAIT | CMDQ_WFE_WAIT_VALUE)
/** cmdq event maximum */
#define CMDQ_MAX_EVENT 0x3ff
/*
* CMDQ_CODE_MASK:
* set write mask
* format: op mask
* CMDQ_CODE_WRITE:
* write value into target register
* format: op subsys address value
* CMDQ_CODE_JUMP:
* jump by offset
* format: op offset
* CMDQ_CODE_WFE:
* wait for event and clear
* it is just clear if no wait
* format: [wait] op event update:1 to_wait:1 wait:1
* [clear] op event update:1 to_wait:0 wait:0
* CMDQ_CODE_EOC:
* end of command
* format: op irq_flag
*/
enum cmdq_code {
CMDQ_CODE_MASK = 0x02,
CMDQ_CODE_WRITE = 0x04,
CMDQ_CODE_POLL = 0x08,
CMDQ_CODE_JUMP = 0x10,
CMDQ_CODE_WFE = 0x20,
CMDQ_CODE_EOC = 0x40,
CMDQ_CODE_READ_S = 0x80,
CMDQ_CODE_WRITE_S = 0x90,
CMDQ_CODE_WRITE_S_MASK = 0x91,
CMDQ_CODE_LOGIC = 0xa0,
};
struct cmdq_cb_data {
int sta;
struct cmdq_pkt *pkt;
};
struct cmdq_pkt {
void *va_base;
dma_addr_t pa_base;
size_t cmd_buf_size; /* command occupied size */
size_t buf_size; /* real buffer size */
void *cl;
};
u8 cmdq_get_shift_pa(struct mbox_chan *chan);
#endif /* __MTK_CMDQ_MAILBOX_H__ */
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