/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
/* Copyright(c) 2007 - 2011 Realtek Corporation. */

#ifndef _RTW_IO_H_
#define _RTW_IO_H_

#include "osdep_service.h"
#include "osdep_intf.h"

#include <asm/byteorder.h>
#include <linux/semaphore.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <asm/atomic.h>

#include <linux/usb.h>
#include <linux/usb/ch9.h>

#define rtw_usb_buffer_alloc(dev, size, dma)				\
	usb_alloc_coherent((dev), (size), (in_interrupt() ?		\
			   GFP_ATOMIC : GFP_KERNEL), (dma))
#define rtw_usb_buffer_free(dev, size, addr, dma)			\
	usb_free_coherent((dev), (size), (addr), (dma))

#define NUM_IOREQ		8

#define MAX_PROT_SZ	(64-16)

#define _IOREADY		0
#define _IO_WAIT_COMPLETE	1
#define _IO_WAIT_RSP		2

/*  IO COMMAND TYPE */
#define _IOSZ_MASK_		(0x7F)
#define _IO_WRITE_		BIT(7)
#define _IO_FIXED_		BIT(8)
#define _IO_BURST_		BIT(9)
#define _IO_BYTE_		BIT(10)
#define _IO_HW_			BIT(11)
#define _IO_WORD_		BIT(12)
#define _IO_SYNC_		BIT(13)
#define _IO_CMDMASK_		(0x1F80)

/*
	For prompt mode accessing, caller shall free io_req
	Otherwise, io_handler will free io_req
*/

/*  IO STATUS TYPE */
#define _IO_ERR_		BIT(2)
#define _IO_SUCCESS_		BIT(1)
#define _IO_DONE_		BIT(0)

#define IO_RD32			(_IO_SYNC_ | _IO_WORD_)
#define IO_RD16			(_IO_SYNC_ | _IO_HW_)
#define IO_RD8			(_IO_SYNC_ | _IO_BYTE_)

#define IO_RD32_ASYNC		(_IO_WORD_)
#define IO_RD16_ASYNC		(_IO_HW_)
#define IO_RD8_ASYNC		(_IO_BYTE_)

#define IO_WR32			(_IO_WRITE_ | _IO_SYNC_ | _IO_WORD_)
#define IO_WR16			(_IO_WRITE_ | _IO_SYNC_ | _IO_HW_)
#define IO_WR8			(_IO_WRITE_ | _IO_SYNC_ | _IO_BYTE_)

#define IO_WR32_ASYNC		(_IO_WRITE_ | _IO_WORD_)
#define IO_WR16_ASYNC		(_IO_WRITE_ | _IO_HW_)
#define IO_WR8_ASYNC		(_IO_WRITE_ | _IO_BYTE_)

/*
	Only Sync. burst accessing is provided.
*/

#define IO_WR_BURST(x)						\
	(_IO_WRITE_ | _IO_SYNC_ | _IO_BURST_ | ((x) & _IOSZ_MASK_))
#define IO_RD_BURST(x)						\
	(_IO_SYNC_ | _IO_BURST_ | ((x) & _IOSZ_MASK_))

/* below is for the intf_option bit defition... */

#define _INTF_ASYNC_	BIT(0)	/* support async io */

struct intf_priv;
struct intf_hdl;
struct io_queue;

struct io_req {
	struct list_head list;
	u32	addr;
	u32	val;
	u32	command;
	u32	status;
	u8	*pbuf;
	struct semaphore sema;

	void (*_async_io_callback)(struct adapter *padater,
				   struct io_req *pio_req, u8 *cnxt);
	u8 *cnxt;
};

struct	intf_hdl {
	struct adapter *padapter;
	struct dvobj_priv *pintf_dev;
};

struct reg_protocol_rd {
#ifdef __LITTLE_ENDIAN
	/* DW1 */
	u32		NumOfTrans:4;
	u32		Reserved1:4;
	u32		Reserved2:24;
	/* DW2 */
	u32		ByteCount:7;
	u32		WriteEnable:1;		/* 0:read, 1:write */
	u32		FixOrContinuous:1;	/* 0:continuous, 1: Fix */
	u32		BurstMode:1;
	u32		Byte1Access:1;
	u32		Byte2Access:1;
	u32		Byte4Access:1;
	u32		Reserved3:3;
	u32		Reserved4:16;
	/* DW3 */
	u32		BusAddress;
	/* DW4 */
	/* u32		Value; */
#else
/* DW1 */
	u32 Reserved1:4;
	u32 NumOfTrans:4;
	u32 Reserved2:24;
	/* DW2 */
	u32 WriteEnable:1;
	u32 ByteCount:7;
	u32 Reserved3:3;
	u32 Byte4Access:1;

	u32 Byte2Access:1;
	u32 Byte1Access:1;
	u32 BurstMode:1;
	u32 FixOrContinuous:1;
	u32 Reserved4:16;
	/* DW3 */
	u32	BusAddress;

	/* DW4 */
#endif
};

struct reg_protocol_wt {
#ifdef __LITTLE_ENDIAN
	/* DW1 */
	u32	NumOfTrans:4;
	u32	Reserved1:4;
	u32	Reserved2:24;
	/* DW2 */
	u32	ByteCount:7;
	u32	WriteEnable:1;		/* 0:read, 1:write */
	u32	FixOrContinuous:1;	/* 0:continuous, 1: Fix */
	u32	BurstMode:1;
	u32	Byte1Access:1;
	u32	Byte2Access:1;
	u32	Byte4Access:1;
	u32	Reserved3:3;
	u32	Reserved4:16;
	/* DW3 */
	u32	BusAddress;
	/* DW4 */
	u32	Value;
#else
	/* DW1 */
	u32 Reserved1 :4;
	u32 NumOfTrans:4;
	u32 Reserved2:24;
	/* DW2 */
	u32 WriteEnable:1;
	u32 ByteCount:7;
	u32 Reserved3:3;
	u32 Byte4Access:1;
	u32 Byte2Access:1;
	u32 Byte1Access:1;
	u32 BurstMode:1;
	u32 FixOrContinuous:1;
	u32 Reserved4:16;
	/* DW3 */
	u32	BusAddress;
	/* DW4 */
	u32	Value;
#endif
};

/*
Below is the data structure used by _io_handler
*/

struct io_queue {
	spinlock_t lock;
	struct list_head free_ioreqs;
	struct list_head pending;	/* The io_req list that will be served
					 * in the single protocol read/write.*/
	struct list_head processing;
	u8	*free_ioreqs_buf; /*  4-byte aligned */
	u8	*pallocated_free_ioreqs_buf;
	struct	intf_hdl	intf;
};

struct io_priv {
	struct adapter *padapter;
	struct intf_hdl intf;
};

uint ioreq_flush(struct adapter *adapter, struct io_queue *ioqueue);
void sync_ioreq_enqueue(struct io_req *preq,struct io_queue *ioqueue);
uint sync_ioreq_flush(struct adapter *adapter, struct io_queue *ioqueue);
uint free_ioreq(struct io_req *preq, struct io_queue *pio_queue);
struct io_req *alloc_ioreq(struct io_queue *pio_q);

uint register_intf_hdl(u8 *dev, struct intf_hdl *pintfhdl);
void unregister_intf_hdl(struct intf_hdl *pintfhdl);

void _rtw_attrib_read(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem);
void _rtw_attrib_write(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem);

int __must_check rtw_read8(struct adapter *adapter, u32 addr, u8 *data);
int __must_check rtw_read16(struct adapter *adapter, u32 addr, u16 *data);
int __must_check rtw_read32(struct adapter *adapter, u32 addr, u32 *data);
void _rtw_read_mem(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem);
u32 rtw_read_port(struct adapter *adapter, u8 *pmem);
void rtw_read_port_cancel(struct adapter *adapter);

int rtw_write8(struct adapter *adapter, u32 addr, u8 val);
int rtw_write16(struct adapter *adapter, u32 addr, u16 val);
int rtw_write32(struct adapter *adapter, u32 addr, u32 val);
int rtw_writeN(struct adapter *adapter, u32 addr, u32 length, u8 *pdata);

void _rtw_write_mem(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem);
u32 rtw_write_port(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem);
void rtw_write_port_cancel(struct adapter *adapter);

void rtw_write_scsi(struct adapter *adapter, u32 cnt, u8 *pmem);

/* ioreq */
void ioreq_read8(struct adapter *adapter, u32 addr, u8 *pval);
void ioreq_read16(struct adapter *adapter, u32 addr, u16 *pval);
void ioreq_read32(struct adapter *adapter, u32 addr, u32 *pval);
void ioreq_write8(struct adapter *adapter, u32 addr, u8 val);
void ioreq_write16(struct adapter *adapter, u32 addr, u16 val);
void ioreq_write32(struct adapter *adapter, u32 addr, u32 val);

uint async_read8(struct adapter *adapter, u32 addr, u8 *pbuff,
		 void (*_async_io_callback)(struct adapter *padater,
					    struct io_req *pio_req,
					    u8 *cnxt), u8 *cnxt);
uint async_read16(struct adapter *adapter, u32 addr,  u8 *pbuff,
		  void (*_async_io_callback)(struct adapter *padater,
					     struct io_req *pio_req,
					     u8 *cnxt), u8 *cnxt);
uint async_read32(struct adapter *adapter, u32 addr,  u8 *pbuff,
		  void (*_async_io_callback)(struct adapter *padater,
					     struct io_req *pio_req,
					     u8 *cnxt), u8 *cnxt);

void async_read_mem(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem);
void async_read_port(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem);

void async_write8(struct adapter *adapter, u32 addr, u8 val,
		  void (*_async_io_callback)(struct adapter *padater,
					     struct io_req *pio_req,
					     u8 *cnxt), u8 *cnxt);
void async_write16(struct adapter *adapter, u32 addr, u16 val,
		   void (*_async_io_callback)(struct adapter *padater,
					      struct io_req *pio_req,
					      u8 *cnxt), u8 *cnxt);
void async_write32(struct adapter *adapter, u32 addr, u32 val,
		   void (*_async_io_callback)(struct adapter *padater,
					      struct io_req *pio_req,
					      u8 *cnxt), u8 *cnxt);

void async_write_mem(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem);
void async_write_port(struct adapter *adapter, u32 addr, u32 cnt, u8 *pmem);

uint alloc_io_queue(struct adapter *adapter);
void free_io_queue(struct adapter *adapter);
void async_bus_io(struct io_queue *pio_q);
void bus_sync_io(struct io_queue *pio_q);
u32 _ioreq2rwmem(struct io_queue *pio_q);
void dev_power_down(struct adapter *Adapter, u8 bpwrup);

#define PlatformEFIOWrite1Byte(_a,_b,_c)		\
	rtw_write8(_a,_b,_c)
#define PlatformEFIOWrite2Byte(_a,_b,_c)		\
	rtw_write16(_a,_b,_c)
#define PlatformEFIOWrite4Byte(_a,_b,_c)		\
	rtw_write32(_a,_b,_c)

#define PlatformEFIORead1Byte(_a,_b)		\
		rtw_read8(_a,_b)
#define PlatformEFIORead2Byte(_a,_b)		\
		rtw_read16(_a,_b)
#define PlatformEFIORead4Byte(_a,_b)		\
		rtw_read32(_a,_b)

#endif	/* _RTL8711_IO_H_ */