/*
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* Hardware driver for 8255 chip
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* @note Copyright (C) 1999 David A. Schleef <ds@schleef.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*/
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#ifndef __ANALOGY_8255_H__
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#define __ANALOGY_8255_H__
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#include <rtdm/analogy/device.h>
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typedef int (*a4l_8255_cb_t)(int, int, int, unsigned long);
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typedef struct subd_8255_struct {
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unsigned long cb_arg;
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a4l_8255_cb_t cb_func;
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unsigned int status;
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int have_irq;
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int io_bits;
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} subd_8255_t;
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#if (defined(CONFIG_XENO_DRIVERS_ANALOGY_8255) || \
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defined(CONFIG_XENO_DRIVERS_ANALOGY_8255_MODULE))
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#define _8255_SIZE 4
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#define _8255_DATA 0
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#define _8255_CR 3
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#define CR_C_LO_IO 0x01
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#define CR_B_IO 0x02
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#define CR_B_MODE 0x04
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#define CR_C_HI_IO 0x08
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#define CR_A_IO 0x10
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#define CR_A_MODE(a) ((a)<<5)
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#define CR_CW 0x80
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void a4l_subdev_8255_init(struct a4l_subdevice *subd);
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void a4l_subdev_8255_interrupt(struct a4l_subdevice *subd);
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#else /* !CONFIG_XENO_DRIVERS_ANALOGY_8255 */
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#define a4l_subdev_8255_init(x) do { } while(0)
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#define a4l_subdev_8255_interrupt(x) do { } while(0)
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#endif /* CONFIG_XENO_DRIVERS_ANALOGY_8255 */
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#endif /* !__ANALOGY_8255_H__ */
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