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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (c) 2007 Will Robertson
*
* 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.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef SPI_IMX31_H
#define SPI_IMX31_H
#define USE_CSPI1_MODULE (1 << 0)
#define USE_CSPI2_MODULE (1 << 1)
#define USE_CSPI3_MODULE (1 << 2)
/* SPI_MODULE_MASK is set in target's config */
enum spi_module_number
{
__CSPI_NUM_START = -1, /* The first will be 0 */
#if (SPI_MODULE_MASK & USE_CSPI1_MODULE)
CSPI1_NUM,
#endif
#if (SPI_MODULE_MASK & USE_CSPI2_MODULE)
CSPI2_NUM,
#endif
#if (SPI_MODULE_MASK & USE_CSPI3_MODULE)
CSPI3_NUM,
#endif
SPI_NUM_CSPI,
};
struct cspi_map
{
volatile uint32_t rxdata; /* 00h */
volatile uint32_t txdata; /* 04h */
volatile uint32_t conreg; /* 08h */
volatile uint32_t intreg; /* 0Ch */
volatile uint32_t dmareg; /* 10h */
volatile uint32_t statreg; /* 14h */
volatile uint32_t periodreg; /* 18h */
volatile uint32_t skip1[0x69]; /* 1Ch */
volatile uint32_t testreg; /* 1C0h */
};
struct spi_node
{
enum spi_module_number num; /* Module number (CSPIx_NUM) */
unsigned long conreg; /* CSPI conreg setup */
unsigned long periodreg; /* CSPI periodreg setup */
};
struct spi_transfer
{
const void *txbuf;
void *rxbuf;
int count;
};
/* One-time init of SPI driver */
void spi_init(void);
/* Enable the specified module for the node */
void spi_enable_module(struct spi_node *node);
/* Disabled the specified module for the node */
void spi_disable_module(struct spi_node *node);
/* Lock module mutex */
void spi_lock(struct spi_node *node);
/* Unlock module mutex */
void spi_unlock(struct spi_node *node);
/* Send and/or receive data on the specified node */
int spi_transfer(struct spi_node *node, struct spi_transfer *trans);
#endif /* SPI_IMX31_H */
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