ti_ssp.h

/*
 * Sequencer Serial Port (SSP) driver for Texas Instruments' SoCs
 *
 * Copyright (C) 2010 Texas Instruments Inc
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef __TI_SSP_H__
#define __TI_SSP_H__

struct ti_ssp_dev_data {
	const char	*dev_name;
	void		*pdata;
	size_t		pdata_size;
};

struct ti_ssp_data {
	unsigned long		out_clock;
	struct ti_ssp_dev_data	dev_data[2];
};

struct ti_ssp_spi_data {
	unsigned long	iosel;
	int		num_cs;
	void		(*select)(int cs);
};

/*
 * Sequencer port IO pin configuration bits.  These do not correlate 1-1 with
 * the hardware.  The iosel field in the port data combines iosel1 and iosel2,
 * and is therefore not a direct map to register space.  It is best to use the
 * macros below to construct iosel values.
 *
 * least significant 16 bits --> iosel1
 * most significant 16 bits  --> iosel2
 */

#define SSP_IN			0x0000
#define SSP_DATA		0x0001
#define SSP_CLOCK		0x0002
#define SSP_CHIPSEL		0x0003
#define SSP_OUT			0x0004
#define SSP_PIN_SEL(pin, v)	((v) << ((pin) * 3))
#define SSP_PIN_MASK(pin)	SSP_PIN_SEL(pin, 0x7)
#define SSP_INPUT_SEL(pin)	((pin) << 16)

/* Sequencer port config bits */
#define SSP_EARLY_DIN		BIT(8)
#define SSP_DELAY_DOUT		BIT(9)

/* Sequence map definitions */
#define SSP_CLK_HIGH		BIT(0)
#define SSP_CLK_LOW		0
#define SSP_DATA_HIGH		BIT(1)
#define SSP_DATA_LOW		0
#define SSP_CS_HIGH		BIT(2)
#define SSP_CS_LOW		0
#define SSP_OUT_MODE		BIT(3)
#define SSP_IN_MODE		0
#define SSP_DATA_REG		BIT(4)
#define SSP_ADDR_REG		0

#define SSP_OPCODE_DIRECT	((0x0) << 5)
#define SSP_OPCODE_TOGGLE	((0x1) << 5)
#define SSP_OPCODE_SHIFT	((0x2) << 5)
#define SSP_OPCODE_BRANCH0	((0x4) << 5)
#define SSP_OPCODE_BRANCH1	((0x5) << 5)
#define SSP_OPCODE_BRANCH	((0x6) << 5)
#define SSP_OPCODE_STOP		((0x7) << 5)
#define SSP_BRANCH(addr)	((addr) << 8)
#define SSP_COUNT(cycles)	((cycles) << 8)

int ti_ssp_raw_read(struct device *dev);
int ti_ssp_raw_write(struct device *dev, u32 val);
int ti_ssp_load(struct device *dev, int offs, u32* prog, int len);
int ti_ssp_run(struct device *dev, u32 pc, u32 input, u32 *output);
int ti_ssp_set_mode(struct device *dev, int mode);
int ti_ssp_set_iosel(struct device *dev, u32 iosel);

#endif /* __TI_SSP_H__ */