[mirror_ubuntu-bionic-kernel.git] / include / linux / platform_data / spi-davinci.h

/*
 * 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 */
Commit	Line	Data
8e2a0013 SP	1	/*
	2	* Copyright 2009 Texas Instruments.
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License as published by
	6	* the Free Software Foundation; either version 2 of the License, or
	7	* (at your option) any later version.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	17	*/
	18
	19	#ifndef __ARCH_ARM_DAVINCI_SPI_H
	20	#define __ARCH_ARM_DAVINCI_SPI_H
	21
3ad7a42d	22	#include <linux/platform_data/edma.h>
2e3e2a5e	23
23853973 BN	24	#define SPI_INTERN_CS 0xFF
23853973 BN	25
8e2a0013 SP	26	enum {
	27	SPI_VERSION_1, /* For DM355/DM365/DM6467 */
	28	SPI_VERSION_2, /* For DA8xx */
	29	};
	30
035540f6 BN	31	/**
	32	* davinci_spi_platform_data - Platform data for SPI master device on DaVinci
	33	*
	34	* @version: version of the SPI IP. Different DaVinci devices have slightly
	35	* varying versions of the same IP.
	36	* @num_chipselect: number of chipselects supported by this SPI master
	37	* @intr_line: interrupt line used to connect the SPI IP to the ARM interrupt
	38	* controller withn the SoC. Possible values are 0 and 1.
	39	* @chip_sel: list of GPIOs which can act as chip-selects for the SPI.
	40	* SPI_INTERN_CS denotes internal SPI chip-select. Not necessary
	41	* to populate if all chip-selects are internal.
	42	* @cshold_bug: set this to true if the SPI controller on your chip requires
	43	* a write to CSHOLD bit in between transfers (like in DM355).
2e3e2a5e MW	44	* @dma_event_q: DMA event queue to use if SPI_IO_TYPE_DMA is used for any
2e3e2a5e MW	45	* device on the bus.
035540f6	46	*/
8e2a0013	47	struct davinci_spi_platform_data {
2e3e2a5e MW	48	u8 version;
	49	u8 num_chipselect;
	50	u8 intr_line;
	51	u8 *chip_sel;
	52	bool cshold_bug;
	53	enum dma_event_q dma_event_q;
53a31b07 BN	54	};
53a31b07 BN	55
035540f6 BN	56	/**
	57	* davinci_spi_config - Per-chip-select configuration for SPI slave devices
	58	*
	59	* @wdelay: amount of delay between transmissions. Measured in number of
	60	* SPI module clocks.
	61	* @odd_parity: polarity of parity flag at the end of transmit data stream.
	62	* 0 - odd parity, 1 - even parity.
	63	* @parity_enable: enable transmission of parity at end of each transmit
	64	* data stream.
	65	* @io_type: type of IO transfer. Choose between polled, interrupt and DMA.
	66	* @timer_disable: disable chip-select timers (setup and hold)
	67	* @c2tdelay: chip-select setup time. Measured in number of SPI module clocks.
	68	* @t2cdelay: chip-select hold time. Measured in number of SPI module clocks.
	69	* @t2edelay: transmit data finished to SPI ENAn pin inactive time. Measured
	70	* in number of SPI clocks.
	71	* @c2edelay: chip-select active to SPI ENAn signal active time. Measured in
	72	* number of SPI clocks.
	73	*/
53a31b07 BN	74	struct davinci_spi_config {
	75	u8 wdelay;
	76	u8 odd_parity;
	77	u8 parity_enable;
e0d205e9 BN	78	#define SPI_IO_TYPE_INTR 0
e0d205e9 BN	79	#define SPI_IO_TYPE_POLL 1
87467bd9	80	#define SPI_IO_TYPE_DMA 2
e0d205e9	81	u8 io_type;
53a31b07	82	u8 timer_disable;
8e2a0013 SP	83	u8 c2tdelay;
8e2a0013 SP	84	u8 t2cdelay;
7abbf23c BN	85	u8 t2edelay;
7abbf23c BN	86	u8 c2edelay;
8e2a0013 SP	87	};
	88
	89	#endif /* __ARCH_ARM_DAVINCI_SPI_H */