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#ifndef CYGONCE_IO_SPI_H
#define CYGONCE_IO_SPI_H
//=============================================================================
//
// spi.h
//
// Generic API for accessing devices on an SPI bus
//
//=============================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 2004 Free Software Foundation, Inc.
//
// eCos 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 or (at your option) any later
// version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License
// along with eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//=============================================================================
//####DESCRIPTIONBEGIN####
//
// Author(s): bartv
// Date: 2004-04-23
//####DESCRIPTIONEND####
//=============================================================================
#include <pkgconf/infra.h>
#include <cyg/infra/cyg_type.h>
#include <cyg/hal/drv_api.h>
#include <cyg/hal/hal_tables.h>
#include <cyg/hal/hal_io.h>
typedef struct cyg_spi_device {
struct cyg_spi_bus* spi_bus;
} cyg_spi_device;
typedef struct cyg_spi_bus {
cyg_drv_mutex_t spi_lock;
#ifdef CYGDBG_USE_ASSERTS
cyg_spi_device* spi_current_device;
#endif
void (*spi_transaction_begin)(cyg_spi_device*);
void (*spi_transaction_transfer)(cyg_spi_device*, cyg_bool, cyg_uint32, const cyg_uint8*, cyg_uint8*, cyg_bool);
void (*spi_transaction_tick)(cyg_spi_device*, cyg_bool, cyg_uint32);
void (*spi_transaction_end)(cyg_spi_device*);
int (*spi_get_config)(cyg_spi_device*, cyg_uint32, void*, cyg_uint32*);
int (*spi_set_config)(cyg_spi_device*, cyg_uint32, const void*, cyg_uint32*);
} cyg_spi_bus;
#ifdef CYGDBG_USE_ASSERTS
# define CYG_SPI_BUS_COMMON_INIT(_bus_) \
CYG_MACRO_START \
cyg_drv_mutex_init( & ((_bus_)->spi_lock)); \
(_bus_)->spi_current_device = (cyg_spi_device*)0; \
CYG_MACRO_END
#else
# define CYG_SPI_BUS_COMMON_INIT(_bus_) \
CYG_MACRO_START \
cyg_drv_mutex_init( & ((_bus_)->spi_lock)); \
CYG_MACRO_END
#endif
// All devices should be in a per-bus table
#define CYG_SPI_DEFINE_BUS_TABLE(_type_, _which_) \
CYG_HAL_TABLE_BEGIN(cyg_spi_bus_ ## _which_ ## _devs, spibus_ ## _which_); \
CYG_HAL_TABLE_END(cyg_spi_bus_ ## _which_ ## _devs_end, spibus_ ## _which_); \
extern _type_ cyg_spi_bus_## _which_ ## _devs[], cyg_spi_bus_## _which_ ## _devs_end
#define CYG_SPI_DEVICE_ON_BUS(_which_) CYG_HAL_TABLE_ENTRY( spibus_ ## _which_)
// Keys for use with the get_config() and set_config() operations.
#define CYG_IO_GET_CONFIG_SPI_CLOCKRATE 0x00000800
#define CYG_IO_SET_CONFIG_SPI_CLOCKRATE 0x00000880
// The simple I/O operations.
externC void cyg_spi_transfer(cyg_spi_device*, cyg_bool, cyg_uint32, const cyg_uint8*, cyg_uint8*);
externC void cyg_spi_tick(cyg_spi_device*, cyg_bool, cyg_uint32);
externC int cyg_spi_get_config(cyg_spi_device*, cyg_uint32, void*, cyg_uint32*);
externC int cyg_spi_set_config(cyg_spi_device*, cyg_uint32, const void*, cyg_uint32*);
// Support for more complicated transactions.
externC void cyg_spi_transaction_begin(cyg_spi_device*);
externC cyg_bool cyg_spi_transaction_begin_nb(cyg_spi_device*);
externC void cyg_spi_transaction_transfer(cyg_spi_device*, cyg_bool, cyg_uint32, const cyg_uint8*, cyg_uint8*, cyg_bool);
externC void cyg_spi_transaction_tick(cyg_spi_device*, cyg_bool, cyg_uint32);
externC void cyg_spi_transaction_end(cyg_spi_device*);
// Allow the HAL to export named devices, without introducing circular
// dependencies in the header files.
#ifdef HAL_SPI_EXPORTED_DEVICES
HAL_SPI_EXPORTED_DEVICES
#endif
//-----------------------------------------------------------------------------
#endif // ifndef CYGONCE_IO_SPI_H
// End of spi.h
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