//------------------------------------------------------------------------------
// <copyright file="hif.h" company="Atheros">
// Copyright (c) 2004-2010 Atheros Corporation. All rights reserved.
//
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
//
//------------------------------------------------------------------------------
//==============================================================================
// HIF specific declarations and prototypes
//
// Author(s): ="Atheros"
//==============================================================================
#ifndef _HIF_H_
#define _HIF_H_
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/* Header files */
#include "a_config.h"
#include "athdefs.h"
#include "a_types.h"
#include "a_osapi.h"
#include "dl_list.h"
typedef struct htc_callbacks HTC_CALLBACKS;
struct hif_device;
/*
* direction - Direction of transfer (HIF_READ/HIF_WRITE).
*/
#define HIF_READ 0x00000001
#define HIF_WRITE 0x00000002
#define HIF_DIR_MASK (HIF_READ | HIF_WRITE)
/*
* type - An interface may support different kind of read/write commands.
* For example: SDIO supports CMD52/CMD53s. In case of MSIO it
* translates to using different kinds of TPCs. The command type
* is thus divided into a basic and an extended command and can
* be specified using HIF_BASIC_IO/HIF_EXTENDED_IO.
*/
#define HIF_BASIC_IO 0x00000004
#define HIF_EXTENDED_IO 0x00000008
#define HIF_TYPE_MASK (HIF_BASIC_IO | HIF_EXTENDED_IO)
/*
* emode - This indicates the whether the command is to be executed in a
* blocking or non-blocking fashion (HIF_SYNCHRONOUS/
* HIF_ASYNCHRONOUS). The read/write data paths in HTC have been
* implemented using the asynchronous mode allowing the the bus
* driver to indicate the completion of operation through the
* registered callback routine. The requirement primarily comes
* from the contexts these operations get called from (a driver's
* transmit context or the ISR context in case of receive).
* Support for both of these modes is essential.
*/
#define HIF_SYNCHRONOUS 0x00000010
#define HIF_ASYNCHRONOUS 0x00000020
#define HIF_EMODE_MASK (HIF_SYNCHRONOUS | HIF_ASYNCHRONOUS)
/*
* dmode - An interface may support different kinds of commands based on
* the tradeoff between the amount of data it can carry and the
* setup time. Byte and Block modes are supported (HIF_BYTE_BASIS/
* HIF_BLOCK_BASIS). In case of latter, the data is rounded off
* to the nearest block size by padding. The size of the block is
* configurable at compile time using the HIF_BLOCK_SIZE and is
* negotiated with the target during initialization after the
* AR6000 interrupts are enabled.
*/
#define HIF_BYTE_BASIS 0x00000040
#define HIF_BLOCK_BASIS 0x00000080
#define HIF_DMODE_MASK (HIF_BYTE_BASIS | HIF_BLOCK_BASIS)
/*
* amode - This indicates if the address has to be incremented on AR6000
* after every read/write operation (HIF?FIXED_ADDRESS/
* HIF_INCREMENTAL_ADDRESS).
*/
#define HIF_FIXED_ADDRESS 0x00000100
#define HIF_INCREMENTAL_ADDRESS 0x00000200
#define HIF_AMODE_MASK (HIF_FIXED_ADDRESS | HIF_INCREMENTAL_ADDRESS)
#define HIF_WR_ASYNC_BYTE_FIX \
(HIF_WRITE | HIF_ASYNCHRONOUS | HIF_EXTENDED_IO | HIF_BYTE_BASIS | HIF_FIXED_ADDRESS)
#define HIF_WR_ASYNC_BYTE_INC \
(HIF_WRITE | HIF_ASYNCHRONOUS | HIF_EXTENDED_IO | HIF_BYTE_BASIS | HIF_INCREMENTAL_ADDRESS)
#define HIF_WR_ASYNC_BLOCK_INC \
(HIF_WRITE | HIF_ASYNCHRONOUS | HIF_EXTENDED_IO | HIF_BLOCK_BASIS | HIF_INCREMENTAL_ADDRESS)
#define HIF_WR_SYNC_BYTE_FIX \
(HIF_WRITE | HIF_SYNCHRONOUS | HIF_EXTENDED_IO | HIF_BYTE_BASIS | HIF_FIXED_ADDRESS)
#define HIF_WR_SYNC_BYTE_INC \
(HIF_WRITE | HIF_SYNCHRONOUS | HIF_EXTENDED_IO | HIF_BYTE_BASIS | HIF_INCREMENTAL_ADDRESS)
#define HIF_WR_SYNC_BLOCK_INC \
(HIF_WRITE | HIF_SYNCHRONOUS | HIF_EXTENDED_IO | HIF_BLOCK_BASIS | HIF_INCREMENTAL_ADDRESS)
#define HIF_WR_ASYNC_BLOCK_FIX \
(HIF_WRITE | HIF_ASYNCHRONOUS | HIF_EXTENDED_IO | HIF_BLOCK_BASIS | HIF_FIXED_ADDRESS)
#define HIF_WR_SYNC_BLOCK_FIX \
(HIF_WRITE | HIF_SYNCHRONOUS | HIF_EXTENDED_IO | HIF_BLOCK_BASIS | HIF_FIXED_ADDRESS)
#define HIF_RD_SYNC_BYTE_INC \
(HIF_READ | HIF_SYNCHRONOUS | HIF_EXTENDED_IO | HIF_BYTE_BASIS | HIF_INCREMENTAL_ADDRESS)
#define HIF_RD_SYNC_BYTE_FIX \
(HIF_READ | HIF_SYNCHRONOUS | HIF_EXTENDED_IO | HIF_BYTE_BASIS | HIF_FIXED_ADDRESS)
#define HIF_RD_ASYNC_BYTE_FIX \
(HIF_READ | HIF_ASYNCHRONOUS | HIF_EXTENDED_IO | HIF_BYTE_BASIS | HIF_FIXED_ADDRESS)
#define HIF_RD_ASYNC_BLOCK_FIX \
(HIF_READ | HIF_ASYNCHRONOUS | HIF_EXTENDED_IO | HIF_BLOCK_BASIS | HIF_FIXED_ADDRESS)
#define HIF_RD_ASYNC_BYTE_INC \
(HIF_READ | HIF_ASYNCHRONOUS | HIF_EXTENDED_IO | HIF_BYTE_BASIS | HIF_INCREMENTAL_ADDRESS)
#define HIF_RD_ASYNC_BLOCK_INC \
(HIF_READ | HIF_ASYNCHRONOUS | HIF_EXTENDED_IO | HIF_BLOCK_BASIS | HIF_INCREMENTAL_ADDRESS)
#define HIF_RD_SYNC_BLOCK_INC \
(HIF_READ | HIF_SYNCHRONOUS | HIF_EXTENDED_IO | HIF_BLOCK_BASIS | HIF_INCREMENTAL_ADDRESS)
#define HIF_RD_SYNC_BLOCK_FIX \
(HIF_READ | HIF_SYNCHRONOUS | HIF_EXTENDED_IO | HIF_BLOCK_BASIS | HIF_FIXED_ADDRESS)
typedef enum {
HIF_DEVICE_POWER_STATE = 0,
HIF_DEVICE_GET_MBOX_BLOCK_SIZE,
HIF_DEVICE_GET_MBOX_ADDR,
HIF_DEVICE_GET_PENDING_EVENTS_FUNC,
HIF_DEVICE_GET_IRQ_PROC_MODE,
HIF_DEVICE_GET_RECV_EVENT_MASK_UNMASK_FUNC,
HIF_DEVICE_POWER_STATE_CHANGE,
HIF_DEVICE_GET_IRQ_YIELD_PARAMS,
HIF_CONFIGURE_QUERY_SCATTER_REQUEST_SUPPORT,
HIF_DEVICE_GET_OS_DEVICE,
HIF_DEVICE_DEBUG_BUS_STATE,
} HIF_DEVICE_CONFIG_OPCODE;
/*
* HIF CONFIGURE definitions:
*
* HIF_DEVICE_GET_MBOX_BLOCK_SIZE
* input : none
* output : array of 4 A_UINT32s
* notes: block size is returned for each mailbox (4)
*
* HIF_DEVICE_GET_MBOX_ADDR
* input : none
* output : struct hif_device_mbox_info
* notes:
*
* HIF_DEVICE_GET_PENDING_EVENTS_FUNC
* input : none
* output: HIF_PENDING_EVENTS_FUNC function pointer
* notes: this is optional for the HIF layer, if the request is
* not handled then it indicates that the upper layer can use
* the standard device methods to get pending events (IRQs, mailbox messages etc..)
* otherwise it can call the function pointer to check pending events.
*
* HIF_DEVICE_GET_IRQ_PROC_MODE
* input : none
* output : HIF_DEVICE_IRQ_PROCESSING_MODE (interrupt processing mode)
* note: the hif layer interfaces with the underlying OS-specific bus driver. The HIF
* layer can report whether IRQ processing is requires synchronous behavior or
* can be processed using asynchronous bus requests (typically faster).
*
* HIF_DEVICE_GET_RECV_EVENT_MASK_UNMASK_FUNC
* input :
* output : HIF_MASK_UNMASK_RECV_EVENT function pointer
* notes: this is optional for the HIF layer. The HIF layer may require a special mechanism
* to mask receive message events. The upper layer can call this pointer when it needs
* to mask/unmask receive events (in case it runs out of buffers).
*
* HIF_DEVICE_POWER_STATE_CHANGE
*
* input : HIF_DEVICE_POWER_CHANGE_TYPE
* output : none
* note: this is optional for the HIF layer. The HIF layer can handle power on/off state change
* requests in an interconnect specific way. This is highly OS and bus driver dependent.
* The caller must guarantee that no HIF read/write requests will be made after the device
* is powered down.
*
* HIF_DEVICE_GET_IRQ_YIELD_PARAMS
*
* input : none
* output : struct hif_device_irq_yield_params
* note: This query checks if the HIF layer wishes to impose a processing yield count for the DSR handler.
* The DSR callback handler will exit after a fixed number of RX packets or events are processed.
* This query is only made if the device reports an IRQ processing mode of HIF_DEVICE_IRQ_SYNC_ONLY.
* The HIF implementation can ignore this command if it does not desire the DSR callback to yield.
* The HIF layer can indicate the maximum number of IRQ processing units (RX packets) before the
* DSR handler callback must yield and return control back to the HIF layer. When a yield limit is
* used the DSR callback will not call HIFAckInterrupts() as it would normally do before returning.
* The HIF implementation that requires a yield count must call HIFAckInterrupt() when it is prepared
* to process interrupts again.
*
* HIF_CONFIGURE_QUERY_SCATTER_REQUEST_SUPPORT
* input : none
* output : struct hif_device_scatter_support_info
* note: This query checks if the HIF layer implements the SCATTER request interface. Scatter requests
* allows upper layers to submit mailbox I/O operations using a list of buffers. This is useful for
* multi-message transfers that can better utilize the bus interconnect.
*
*
* HIF_DEVICE_GET_OS_DEVICE
* intput : none
* output : struct hif_device_os_device_info;
* note: On some operating systems, the HIF layer has a parent device object for the bus. This object
* may be required to register certain types of logical devices.
*
* HIF_DEVICE_DEBUG_BUS_STATE
* input : none
* output : none
* note: This configure option triggers the HIF interface to dump as much bus interface state. This
* configuration request is optional (No-OP on some HIF implementations)
*
*/
struct hif_mbox_properties {
u32 ExtendedAddress; /* extended address for larger writes */
u32 ExtendedSize;
};
#define HIF_MBOX_FLAG_NO_BUNDLING (1 << 0) /* do not allow bundling over the mailbox */
typedef enum _MBOX_BUF_IF_TYPE {
MBOX_BUS_IF_SDIO = 0,
MBOX_BUS_IF_SPI = 1,
} MBOX_BUF_IF_TYPE;
struct hif_device_mbox_info {
u32 MboxAddresses[4]; /* must be first element for legacy HIFs that return the address in
and ARRAY of 32-bit words */
/* the following describe extended mailbox properties */
struct hif_mbox_properties MboxProp[4];
/* if the HIF supports the GMbox extended address region it can report it
* here, some interfaces cannot support the GMBOX address range and not set this */
u32 GMboxAddress;
u32 GMboxSize;
u32 Flags; /* flags to describe mbox behavior or usage */
MBOX_BUF_IF_TYPE MboxBusIFType; /* mailbox bus interface type */
};
typedef enum {
HIF_DEVICE_IRQ_SYNC_ONLY, /* for HIF implementations that require the DSR to process all
interrupts before returning */
HIF_DEVICE_IRQ_ASYNC_SYNC, /* for HIF implementations that allow DSR to process interrupts
using ASYNC I/O (that is HIFAckInterrupt can be called at a
later time */
} HIF_DEVICE_IRQ_PROCESSING_MODE;
typedef enum {
HIF_DEVICE_POWER_UP, /* HIF layer should power up interface and/or module */
HIF_DEVICE_POWER_DOWN, /* HIF layer should initiate bus-specific measures to minimize power */
HIF_DEVICE_POWER_CUT /* HIF layer should initiate bus-specific AND/OR platform-specific measures
to completely power-off the module and associated hardware (i.e. cut power supplies)
*/
} HIF_DEVICE_POWER_CHANGE_TYPE;
struct hif_device_irq_yield_params {
int RecvPacketYieldCount; /* max number of packets to force DSR to return */
};
struct hif_scatter_item {
u8 *pBuffer; /* CPU accessible address of buffer */
int Length; /* length of transfer to/from this buffer */
void *pCallerContexts[2]; /* space for caller to insert a context associated with this item */
};
struct hif_scatter_req;
typedef void ( *HIF_SCATTER_COMP_CB)(struct hif_scatter_req *);
typedef enum _HIF_SCATTER_METHOD {
HIF_SCATTER_NONE = 0,
HIF_SCATTER_DMA_REAL, /* Real SG support no restrictions */
HIF_SCATTER_DMA_BOUNCE, /* Uses SG DMA but HIF layer uses an internal bounce buffer */
} HIF_SCATTER_METHOD;
struct hif_scatter_req {
struct dl_list ListLink; /* link management */
u32 Address; /* address for the read/write operation */
u32 Request; /* request flags */
u32 TotalLength; /* total length of entire transfer */
u32 CallerFlags; /* caller specific flags can be stored here */
HIF_SCATTER_COMP_CB CompletionRoutine; /* completion routine set by caller */
int CompletionStatus; /* status of completion */
void *Context; /* caller context for this request */
int ValidScatterEntries; /* number of valid entries set by caller */
HIF_SCATTER_METHOD ScatterMethod; /* scatter method handled by HIF */
void *HIFPrivate[4]; /* HIF private area */
u8 *pScatterBounceBuffer; /* bounce buffer for upper layers to copy to/from */
struct hif_scatter_item ScatterList[1]; /* start of scatter list */
};
typedef struct hif_scatter_req * ( *HIF_ALLOCATE_SCATTER_REQUEST)(struct hif_device *device);
typedef void ( *HIF_FREE_SCATTER_REQUEST)(struct hif_device *device, struct hif_scatter_req *request);
typedef int ( *HIF_READWRITE_SCATTER)(struct hif_device *device, struct hif_scatter_req *request);
struct hif_device_scatter_support_info {
/* information returned from HIF layer */
HIF_ALLOCATE_SCATTER_REQUEST pAllocateReqFunc;
HIF_FREE_SCATTER_REQUEST pFreeReqFunc;
HIF_READWRITE_SCATTER pReadWriteScatterFunc;
int MaxScatterEntries;
int MaxTransferSizePerScatterReq;
};
struct hif_device_os_device_info {
void *pOSDevice;
};
#define HIF_MAX_DEVICES 1
struct htc_callbacks {
void *context; /* context to pass to the dsrhandler
note : rwCompletionHandler is provided the context passed to HIFReadWrite */
int (* rwCompletionHandler)(void *rwContext, int status);
int (* dsrHandler)(void *context);
};
typedef struct osdrv_callbacks {
void *context; /* context to pass for all callbacks except deviceRemovedHandler
the deviceRemovedHandler is only called if the device is claimed */
int (* deviceInsertedHandler)(void *context, void *hif_handle);
int (* deviceRemovedHandler)(void *claimedContext, void *hif_handle);
int (* deviceSuspendHandler)(void *context);
int (* deviceResumeHandler)(void *context);
int (* deviceWakeupHandler)(void *context);
int (* devicePowerChangeHandler)(void *context, HIF_DEVICE_POWER_CHANGE_TYPE config);
} OSDRV_CALLBACKS;
#define HIF_OTHER_EVENTS (1 << 0) /* other interrupts (non-Recv) are pending, host
needs to read the register table to figure out what */
#define HIF_RECV_MSG_AVAIL (1 << 1) /* pending recv packet */
struct hif_pending_events_info {
u32 Events;
u32 LookAhead;
u32 AvailableRecvBytes;
#ifdef THREAD_X
u32 Polling;
u32 INT_CAUSE_REG;
#endif
};
/* function to get pending events , some HIF modules use special mechanisms
* to detect packet available and other interrupts */
typedef int ( *HIF_PENDING_EVENTS_FUNC)(struct hif_device *device,
struct hif_pending_events_info *pEvents,
void *AsyncContext);
#define HIF_MASK_RECV true
#define HIF_UNMASK_RECV false
/* function to mask recv events */
typedef int ( *HIF_MASK_UNMASK_RECV_EVENT)(struct hif_device *device,
bool Mask,
void *AsyncContext);
/*
* This API is used to perform any global initialization of the HIF layer
* and to set OS driver callbacks (i.e. insertion/removal) to the HIF layer
*
*/
int HIFInit(OSDRV_CALLBACKS *callbacks);
/* This API claims the HIF device and provides a context for handling removal.
* The device removal callback is only called when the OSDRV layer claims
* a device. The claimed context must be non-NULL */
void HIFClaimDevice(struct hif_device *device, void *claimedContext);
/* release the claimed device */
void HIFReleaseDevice(struct hif_device *device);
/* This API allows the HTC layer to attach to the HIF device */
int HIFAttachHTC(struct hif_device *device, HTC_CALLBACKS *callbacks);
/* This API detaches the HTC layer from the HIF device */
void HIFDetachHTC(struct hif_device *device);
/*
* This API is used to provide the read/write interface over the specific bus
* interface.
* address - Starting address in the AR6000's address space. For mailbox
* writes, it refers to the start of the mbox boundary. It should
* be ensured that the last byte falls on the mailbox's EOM. For
* mailbox reads, it refers to the end of the mbox boundary.
* buffer - Pointer to the buffer containg the data to be transmitted or
* received.
* length - Amount of data to be transmitted or received.
* request - Characterizes the attributes of the command.
*/
int
HIFReadWrite(struct hif_device *device,
u32 address,
u8 *buffer,
u32 length,
u32 request,
void *context);
/*
* This can be initiated from the unload driver context when the OSDRV layer has no more use for
* the device.
*/
void HIFShutDownDevice(struct hif_device *device);
/*
* This should translate to an acknowledgment to the bus driver indicating that
* the previous interrupt request has been serviced and the all the relevant
* sources have been cleared. HTC is ready to process more interrupts.
* This should prevent the bus driver from raising an interrupt unless the
* previous one has been serviced and acknowledged using the previous API.
*/
void HIFAckInterrupt(struct hif_device *device);
void HIFMaskInterrupt(struct hif_device *device);
void HIFUnMaskInterrupt(struct hif_device *device);
#ifdef THREAD_X
/*
* This set of functions are to be used by the bus driver to notify
* the HIF module about various events.
* These are not implemented if the bus driver provides an alternative
* way for this notification though callbacks for instance.
*/
int HIFInsertEventNotify(void);
int HIFRemoveEventNotify(void);
int HIFIRQEventNotify(void);
int HIFRWCompleteEventNotify(void);
#endif
int
HIFConfigureDevice(struct hif_device *device, HIF_DEVICE_CONFIG_OPCODE opcode,
void *config, u32 configLen);
/*
* This API wait for the remaining MBOX messages to be drained
* This should be moved to HTC AR6K layer
*/
int hifWaitForPendingRecv(struct hif_device *device);
#ifdef __cplusplus
}
#endif
#endif /* _HIF_H_ */