2015-09-04 21:58:08 +08:00
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/*
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* File : spi-davinci.h
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2011-01-13 weety first version
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*/
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2015-09-04 12:30:20 +08:00
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#ifndef __DAVINCI_SPI_H
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#define __DAVINCI_SPI_H
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typedef unsigned long u32;
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typedef unsigned short u16;
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typedef unsigned char u8;
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typedef unsigned int bool;
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#define SPI_INTERN_CS 0xFF
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enum {
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SPI_VERSION_1, /* For DM355/DM365/DM6467 */
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SPI_VERSION_2, /* For DA8xx */
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};
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/**
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* davinci_spi_config - Per-chip-select configuration for SPI slave devices
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*
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* @wdelay: amount of delay between transmissions. Measured in number of
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* SPI module clocks.
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* @odd_parity: polarity of parity flag at the end of transmit data stream.
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* 0 - odd parity, 1 - even parity.
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* @parity_enable: enable transmission of parity at end of each transmit
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* data stream.
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* @io_type: type of IO transfer. Choose between polled, interrupt and DMA.
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* @timer_disable: disable chip-select timers (setup and hold)
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* @c2tdelay: chip-select setup time. Measured in number of SPI module clocks.
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* @t2cdelay: chip-select hold time. Measured in number of SPI module clocks.
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* @t2edelay: transmit data finished to SPI ENAn pin inactive time. Measured
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* in number of SPI clocks.
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* @c2edelay: chip-select active to SPI ENAn signal active time. Measured in
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* number of SPI clocks.
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*/
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struct davinci_spi_config {
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u8 wdelay;
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u8 odd_parity;
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u8 parity_enable;
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#define SPI_IO_TYPE_INTR 0
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#define SPI_IO_TYPE_POLL 1
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#define SPI_IO_TYPE_DMA 2
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u8 io_type;
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u8 timer_disable;
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u8 c2tdelay;
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u8 t2cdelay;
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u8 t2edelay;
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u8 c2edelay;
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};
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extern int rt_hw_spi_init(void);
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#endif /* __DAVINCI_SPI_H */
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