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/*
* include/asm-arm/arch-imx/spi_imx.h
*
* Copyright (C) 2006 SWAPP
* Andrea Paterniani <a.paterniani@swapp-eng.it>
*
* Initial version inspired by:
* linux-2.6.17-rc3-mm1/include/asm-arm/arch-pxa/pxa2xx_spi.h
*
* 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 program 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 this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef SPI_IMX_H_
#define SPI_IMX_H_
/*-------------------------------------------------------------------------*/
/**
* struct spi_imx_master - device.platform_data for SPI controller devices.
* @num_chipselect: chipselects are used to distinguish individual
* SPI slaves, and are numbered from zero to num_chipselects - 1.
* each slave has a chipselect signal, but it's common that not
* every chipselect is connected to a slave.
* @enable_dma: if true enables DMA driven transfers.
*/
struct spi_imx_master {
u8 num_chipselect;
u8 enable_dma:1;
};
/*-------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------*/
/**
* struct spi_imx_chip - spi_board_info.controller_data for SPI
* slave devices, copied to spi_device.controller_data.
* @enable_loopback : used for test purpouse to internally connect RX and TX
* sections.
* @enable_dma : enables dma transfer (provided that controller driver has
* dma enabled too).
* @ins_ss_pulse : enable /SS pulse insertion between SPI burst.
* @bclk_wait : number of bclk waits between each bits_per_word SPI burst.
* @cs_control : function pointer to board-specific function to assert/deassert
* I/O port to control HW generation of devices chip-select.
*/
struct spi_imx_chip {
u8 enable_loopback:1;
u8 enable_dma:1;
u8 ins_ss_pulse:1;
u16 bclk_wait:15;
void (*cs_control)(u32 control);
};
/* Chip-select state */
#define SPI_CS_ASSERT (1 << 0)
#define SPI_CS_DEASSERT (1 << 1)
/*-------------------------------------------------------------------------*/
#endif /* SPI_IMX_H_*/
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