include/media/blackfin/ppi.h

   1 /*
   2  * Analog Devices PPI header file
   3  *
   4  * Copyright (c) 2011 Analog Devices Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #ifndef _PPI_H_
  21 #define _PPI_H_
  22
  23 #include <linux/interrupt.h>
  24 #include <asm/blackfin.h>
  25 #include <asm/bfin_ppi.h>
  26
  27 /* EPPI */
  28 #ifdef EPPI_EN
  29 #define PORT_EN EPPI_EN
  30 #define PORT_DIR EPPI_DIR
  31 #define DMA32 0
  32 #define PACK_EN PACKEN
  33 #endif
  34
  35 /* EPPI3 */
  36 #ifdef EPPI0_CTL2
  37 #define PORT_EN EPPI_CTL_EN
  38 #define PORT_DIR EPPI_CTL_DIR
  39 #define PACK_EN EPPI_CTL_PACKEN
  40 #define DMA32 0
  41 #define DLEN_8 EPPI_CTL_DLEN08
  42 #define DLEN_16 EPPI_CTL_DLEN16
  43 #endif
  44
  45 struct ppi_if;
  46
  47 struct ppi_params {
  48         u32 width;              /* width in pixels */
  49         u32 height;             /* height in lines */
  50         u32 hdelay;             /* delay after the HSYNC in pixels */
  51         u32 vdelay;             /* delay after the VSYNC in lines */
  52         u32 line;               /* total pixels per line */
  53         u32 frame;              /* total lines per frame */
  54         u32 hsync;              /* HSYNC length in pixels */
  55         u32 vsync;              /* VSYNC length in lines */
  56         int bpp;                /* bits per pixel */
  57         int dlen;               /* data length for ppi in bits */
  58         u32 ppi_control;        /* ppi configuration */
  59         u32 int_mask;           /* interrupt mask */
  60 };
  61
  62 struct ppi_ops {
  63         int (*attach_irq)(struct ppi_if *ppi, irq_handler_t handler);
  64         void (*detach_irq)(struct ppi_if *ppi);
  65         int (*start)(struct ppi_if *ppi);
  66         int (*stop)(struct ppi_if *ppi);
  67         int (*set_params)(struct ppi_if *ppi, struct ppi_params *params);
  68         void (*update_addr)(struct ppi_if *ppi, unsigned long addr);
  69 };
  70
  71 enum ppi_type {
  72         PPI_TYPE_PPI,
  73         PPI_TYPE_EPPI,
  74         PPI_TYPE_EPPI3,
  75 };
  76
  77 struct ppi_info {
  78         enum ppi_type type;
  79         int dma_ch;
  80         int irq_err;
  81         void __iomem *base;
  82         const unsigned short *pin_req;
  83 };
  84
  85 struct ppi_if {
  86         unsigned long ppi_control;
  87         const struct ppi_ops *ops;
  88         const struct ppi_info *info;
  89         bool err_int; /* if we need request error interrupt */
  90         bool err; /* if ppi has fifo error */
  91         void *priv;
  92 };
  93
  94 struct ppi_if *ppi_create_instance(const struct ppi_info *info);
  95 void ppi_delete_instance(struct ppi_if *ppi);
  96 #endif