90 lines
3.1 KiB
C
90 lines
3.1 KiB
C
/*
|
|
* Copyright 2009 Texas Instruments.
|
|
*
|
|
* 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 __ARCH_ARM_DAVINCI_SPI_H
|
|
#define __ARCH_ARM_DAVINCI_SPI_H
|
|
|
|
#include <linux/platform_data/edma.h>
|
|
|
|
#define SPI_INTERN_CS 0xFF
|
|
|
|
enum {
|
|
SPI_VERSION_1, /* For DM355/DM365/DM6467 */
|
|
SPI_VERSION_2, /* For DA8xx */
|
|
};
|
|
|
|
/**
|
|
* davinci_spi_platform_data - Platform data for SPI master device on DaVinci
|
|
*
|
|
* @version: version of the SPI IP. Different DaVinci devices have slightly
|
|
* varying versions of the same IP.
|
|
* @num_chipselect: number of chipselects supported by this SPI master
|
|
* @intr_line: interrupt line used to connect the SPI IP to the ARM interrupt
|
|
* controller withn the SoC. Possible values are 0 and 1.
|
|
* @chip_sel: list of GPIOs which can act as chip-selects for the SPI.
|
|
* SPI_INTERN_CS denotes internal SPI chip-select. Not necessary
|
|
* to populate if all chip-selects are internal.
|
|
* @cshold_bug: set this to true if the SPI controller on your chip requires
|
|
* a write to CSHOLD bit in between transfers (like in DM355).
|
|
* @dma_event_q: DMA event queue to use if SPI_IO_TYPE_DMA is used for any
|
|
* device on the bus.
|
|
*/
|
|
struct davinci_spi_platform_data {
|
|
u8 version;
|
|
u8 num_chipselect;
|
|
u8 intr_line;
|
|
u8 *chip_sel;
|
|
bool cshold_bug;
|
|
enum dma_event_q dma_event_q;
|
|
};
|
|
|
|
/**
|
|
* davinci_spi_config - Per-chip-select configuration for SPI slave devices
|
|
*
|
|
* @wdelay: amount of delay between transmissions. Measured in number of
|
|
* SPI module clocks.
|
|
* @odd_parity: polarity of parity flag at the end of transmit data stream.
|
|
* 0 - odd parity, 1 - even parity.
|
|
* @parity_enable: enable transmission of parity at end of each transmit
|
|
* data stream.
|
|
* @io_type: type of IO transfer. Choose between polled, interrupt and DMA.
|
|
* @timer_disable: disable chip-select timers (setup and hold)
|
|
* @c2tdelay: chip-select setup time. Measured in number of SPI module clocks.
|
|
* @t2cdelay: chip-select hold time. Measured in number of SPI module clocks.
|
|
* @t2edelay: transmit data finished to SPI ENAn pin inactive time. Measured
|
|
* in number of SPI clocks.
|
|
* @c2edelay: chip-select active to SPI ENAn signal active time. Measured in
|
|
* number of SPI clocks.
|
|
*/
|
|
struct davinci_spi_config {
|
|
u8 wdelay;
|
|
u8 odd_parity;
|
|
u8 parity_enable;
|
|
#define SPI_IO_TYPE_INTR 0
|
|
#define SPI_IO_TYPE_POLL 1
|
|
#define SPI_IO_TYPE_DMA 2
|
|
u8 io_type;
|
|
u8 timer_disable;
|
|
u8 c2tdelay;
|
|
u8 t2cdelay;
|
|
u8 t2edelay;
|
|
u8 c2edelay;
|
|
};
|
|
|
|
#endif /* __ARCH_ARM_DAVINCI_SPI_H */
|