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 {
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(const struct ppi_info *info);
void ppi_delete_instance(struct ppi_if *ppi);
#endif