3fedd14818
Originally written by Guenter Gebhardt <g.gebhardt@meilhaus.de> and Krzysztof Gantzke <k.gantzke@meilhaus.de> This is the drv/lnx/mod directory of ME-IDS 1.2.9 tarball with some files from drv/lnx/include. Signed-off-by: David Kiliani <mail@davidkiliani.de> Cc: Guenter Gebhardt <g.gebhardt@meilhaus.de> Cc: Krzysztof Gantzke <k.gantzke@meilhaus.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
60 lines
2 KiB
C
60 lines
2 KiB
C
/**
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* @file me8255.h
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*
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* @brief Meilhaus PIO 8255 implementation.
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* @note Copyright (C) 2006 Meilhaus Electronic GmbH (support@meilhaus.de)
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* @author Guenter Gebhardt
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*/
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#ifndef _ME8255_H_
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#define _ME8255_H_
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#include "mesubdevice.h"
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#include "meslock.h"
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#ifdef __KERNEL__
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/**
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* @brief The 8255 subdevice class.
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*/
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typedef struct me8255_subdevice {
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/* Inheritance */
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me_subdevice_t base; /**< The subdevice base class. */
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/* Attributes */
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spinlock_t subdevice_lock; /**< Spin lock to protect the subdevice from concurrent access. */
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int *ctrl_reg_mirror; /**< Pointer to mirror of the control register. */
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spinlock_t *ctrl_reg_lock; /**< Spin lock to protect #ctrl_reg and #ctrl_reg_mirror from concurrent access. */
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uint32_t device_id; /**< The PCI device id of the device holding the 8255 chip. */
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int me8255_idx; /**< The index of the 8255 chip on the device. */
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int dio_idx; /**< The index of the DIO port on the 8255 chip. */
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unsigned long port_reg; /**< Register to read or write a value from or to the port respectively. */
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unsigned long ctrl_reg; /**< Register to configure the 8255 modes. */
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} me8255_subdevice_t;
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/**
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* @brief The constructor to generate a 8255 instance.
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*
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* @param device_id The kind of Meilhaus device holding the 8255.
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* @param reg_base The register base address of the device as returned by the PCI BIOS.
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* @param me8255_idx The index of the 8255 chip on the Meilhaus device.
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* @param dio_idx The index of the counter inside a 8255 chip.
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* @param ctr_reg_mirror Pointer to mirror of control register.
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* @param ctrl_reg_lock Pointer to spin lock protecting the 8255 control register and #ctrl_reg_mirror from concurrent access.
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*
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* @return Pointer to new instance on success.\n
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* NULL on error.
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*/
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me8255_subdevice_t *me8255_constructor(uint32_t device_id,
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uint32_t reg_base,
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unsigned int me8255_idx,
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unsigned int dio_idx,
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int *ctrl_reg_mirror,
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spinlock_t * ctrl_reg_lock);
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#endif
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#endif
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