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/**
* @file me1600_ao.h
*
* @brief Meilhaus ME-1600 analog output subdevice class.
* @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
* @author Guenter Gebhardt
*/
/*
* Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 _ME1600_AO_H_
#define _ME1600_AO_H_
# include <linux/version.h>
# include "mesubdevice.h"
# ifdef __KERNEL__
# define ME1600_MAX_RANGES 2 /**< Specifies the maximum number of ranges in me1600_ao_subdevice_t::u_ranges und me1600_ao_subdevice_t::i_ranges. */
/**
* @brief Defines a entry in the range table.
*/
typedef struct me1600_ao_range_entry {
int32_t min;
int32_t max;
} me1600_ao_range_entry_t;
typedef struct me1600_ao_timeout {
unsigned long start_time;
unsigned long delay;
} me1600_ao_timeout_t;
typedef struct me1600_ao_shadow {
int count;
unsigned long *registry;
uint16_t *shadow;
uint16_t *mirror;
uint16_t synchronous; /**< Synchronization list. */
uint16_t trigger; /**< Synchronization flag. */
} me1600_ao_shadow_t;
typedef enum ME1600_AO_STATUS {
ao_status_none = 0,
ao_status_single_configured,
ao_status_single_run,
ao_status_single_end,
ao_status_last
} ME1600_AO_STATUS;
/**
* @brief The ME-1600 analog output subdevice class.
*/
typedef struct me1600_ao_subdevice {
/* Inheritance */
me_subdevice_t base; /**< The subdevice base class. */
/* Attributes */
int ao_idx; /**< The index of the analog output subdevice on the device. */
spinlock_t subdevice_lock; /**< Spin lock to protect the subdevice from concurrent access. */
spinlock_t *config_regs_lock; /**< Spin lock to protect configuration registers from concurrent access. */
int u_ranges_count; /**< The number of voltage ranges available on this subdevice. */
me1600_ao_range_entry_t u_ranges[ME1600_MAX_RANGES]; /**< Array holding the voltage ranges on this subdevice. */
int i_ranges_count; /**< The number of current ranges available on this subdevice. */
me1600_ao_range_entry_t i_ranges[ME1600_MAX_RANGES]; /**< Array holding the current ranges on this subdevice. */
/* Registers */
unsigned long uni_bi_reg; /**< Register for switching between unipoar and bipolar output mode. */
unsigned long i_range_reg; /**< Register for switching between ranges. */
unsigned long sim_output_reg; /**< Register used in order to update all channels simultaneously. */
unsigned long current_on_reg; /**< Register enabling current output on the fourth subdevice. */
# ifdef PDEBUG_REG
unsigned long reg_base;
# endif
ME1600_AO_STATUS status;
me1600_ao_shadow_t *ao_regs_shadows; /**< Addresses and shadows of output's registers. */
spinlock_t *ao_shadows_lock; /**< Protects the shadow's struct. */
int mode; /**< Mode in witch output should works. */
wait_queue_head_t wait_queue; /**< Wait queue to put on tasks waiting for data to arrive. */
me1600_ao_timeout_t timeout; /**< The timeout for start in blocking and non-blocking mode. */
struct workqueue_struct *me1600_workqueue;
struct delayed_work ao_control_task;
volatile int ao_control_task_flag; /**< Flag controling reexecuting of control task */
} me1600_ao_subdevice_t;
/**
* @brief The constructor to generate a subdevice template instance.
*
* @param reg_base The register base address of the device as returned by the PCI BIOS.
* @param ao_idx The index of the analog output subdevice on the device.
* @param current Flag indicating that analog output with #ao_idx of 3 is capable of current output.
* @param config_regs_lock Pointer to spin lock protecting the configuration registers and from concurrent access.
*
* @return Pointer to new instance on success.\n
* NULL on error.
*/
me1600_ao_subdevice_t *me1600_ao_constructor(uint32_t reg_base,
unsigned int ao_idx,
int curr,
spinlock_t * config_regs_lock,
spinlock_t * ao_shadows_lock,
me1600_ao_shadow_t *
ao_regs_shadows,
struct workqueue_struct
*me1600_wq);
# endif //__KERNEL__
#endif //_ME1600_AO_H_
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