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Filename : ppi.h
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/*
 * Analog Devices PPI header file
 *
 * Copyright (c) 2011 Analog Devices Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * 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 _PPI_H_
#define _PPI_H_

#include <linux/interrupt.h>
#include <asm/blackfin.h>
#include <asm/bfin_ppi.h>

/* EPPI */
#ifdef EPPI_EN
#define PORT_EN EPPI_EN
#define PORT_DIR EPPI_DIR
#define DMA32 0
#define PACK_EN PACKEN
#endif

/* EPPI3 */
#ifdef EPPI0_CTL2
#define PORT_EN EPPI_CTL_EN
#define PORT_DIR EPPI_CTL_DIR
#define PACK_EN EPPI_CTL_PACKEN
#define DMA32 0
#define DLEN_8 EPPI_CTL_DLEN08
#define DLEN_16 EPPI_CTL_DLEN16
#endif

struct ppi_if;

struct ppi_params {
	u32 width;              /* width in pixels */
	u32 height;             /* height in lines */
	u32 hdelay;             /* delay after the HSYNC in pixels */
	u32 vdelay;             /* delay after the VSYNC in lines */
	u32 line;               /* total pixels per line */
	u32 frame;              /* total lines per frame */
	u32 hsync;              /* HSYNC length in pixels */
	u32 vsync;              /* VSYNC length in lines */
	int bpp;                /* bits per pixel */
	int dlen;               /* data length for ppi in bits */
	u32 ppi_control;        /* ppi configuration */
	u32 int_mask;           /* interrupt mask */
};

struct ppi_ops {
	int (*attach_irq)(struct ppi_if *ppi, irq_handler_t handler);
	void (*detach_irq)(struct ppi_if *ppi);
	int (*start)(struct ppi_if *ppi);
	int (*stop)(struct ppi_if *ppi);
	int (*set_params)(struct ppi_if *ppi, struct ppi_params *params);
	void (*update_addr)(struct ppi_if *ppi, unsigned long addr);
};

enum ppi_type {
	PPI_TYPE_PPI,
	PPI_TYPE_EPPI,
	PPI_TYPE_EPPI3,
};

struct ppi_info {
	enum ppi_type type;
	int dma_ch;
	int irq_err;
	void __iomem *base;
	const unsigned short *pin_req;
};

struct ppi_if {
	struct device *dev;
	unsigned long ppi_control;
	const struct ppi_ops *ops;
	const struct ppi_info *info;
	bool err_int; /* if we need request error interrupt */
	bool err; /* if ppi has fifo error */
	void *priv;
};

struct ppi_if *ppi_create_instance(struct platform_device *pdev,
			const struct ppi_info *info);
void ppi_delete_instance(struct ppi_if *ppi);
#endif