483f29cc43
Cc: David Kiliani <mail@davidkiliani.de> Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
177 lines
6.2 KiB
C
177 lines
6.2 KiB
C
/**
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* @file me4600_ai.h
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*
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* @brief Meilhaus ME-4000 analog input subdevice class.
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* @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
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* @author Guenter Gebhardt
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* @author Krzysztof Gantzke (k.gantzke@meilhaus.de)
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*/
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/*
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* Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef _ME4600_AI_H_
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#define _ME4600_AI_H_
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#include <linux/version.h>
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#include "mesubdevice.h"
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#include "meioctl.h"
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#include "mecirc_buf.h"
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#ifdef __KERNEL__
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#define ME4600_AI_MAX_DATA 0xFFFF
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#ifdef ME_SYNAPSE
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# define ME4600_AI_CIRC_BUF_SIZE_ORDER 8 // 2^n PAGES =>> Maximum value of 1MB for Synapse
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#else
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# define ME4600_AI_CIRC_BUF_SIZE_ORDER 5 // 2^n PAGES =>> 128KB
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#endif
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#define ME4600_AI_CIRC_BUF_SIZE PAGE_SIZE<<ME4600_AI_CIRC_BUF_SIZE_ORDER // Buffer size in bytes.
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#ifdef _CBUFF_32b_t
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# define ME4600_AI_CIRC_BUF_COUNT ((ME4600_AI_CIRC_BUF_SIZE) / sizeof(uint32_t)) // Size in values
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#else
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# define ME4600_AI_CIRC_BUF_COUNT ((ME4600_AI_CIRC_BUF_SIZE) / sizeof(uint16_t)) // Size in values
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#endif
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#define ME4600_AI_FIFO_HALF 1024 //ME4600_AI_FIFO_COUNT/2 //1024
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#define ME4600_AI_FIFO_MAX_SC 1352 //0.66*ME4600_AI_FIFO_COUNT //1352
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typedef enum ME4600_AI_STATUS {
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ai_status_none = 0,
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ai_status_single_configured,
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ai_status_stream_configured,
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ai_status_stream_run_wait,
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ai_status_stream_run,
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ai_status_stream_end_wait,
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ai_status_stream_end,
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ai_status_stream_fifo_error,
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ai_status_stream_buffer_error,
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ai_status_stream_error,
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ai_status_last
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} ME4600_AI_STATUS;
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typedef struct me4600_single_config_entry {
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unsigned short status;
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uint32_t entry;
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uint32_t ctrl;
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} me4600_single_config_entry_t;
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typedef struct me4600_range_entry {
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int min;
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int max;
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} me4600_range_entry_t;
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typedef struct me4600_ai_ISM {
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volatile unsigned int global_read; /**< The number of data read in total. */
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volatile unsigned int read; /**< The number of data read for this chunck. */
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volatile unsigned int next; /**< The number of data request by user. */
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} me4600_ai_ISM_t;
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typedef struct me4600_ai_timeout {
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unsigned long start_time;
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unsigned long delay;
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} me4600_ai_timeout_t;
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/**
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* @brief The ME-4000 analog input subdevice class.
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*/
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typedef struct me4600_ai_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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spinlock_t *ctrl_reg_lock; /**< Spin lock to protect #ctrl_reg from concurrent access. */
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/* Hardware feautres */
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unsigned int irq; /**< The interrupt request number assigned by the PCI BIOS. */
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int isolated; /**< Marks if this subdevice is on an optoisolated device. */
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int sh; /**< Marks if this subdevice has sample and hold devices. */
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unsigned int channels; /**< The number of channels available on this subdevice. */
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me4600_single_config_entry_t single_config[32]; /**< The configuration set for single acquisition. */
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unsigned int data_required; /**< The number of data request by user. */
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unsigned int fifo_irq_threshold; /**< The user adjusted FIFO high water interrupt level. */
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unsigned int chan_list_len; /**< The length of the user defined channel list. */
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me4600_ai_ISM_t ISM; /**< The information request by Interrupt-State-Machine. */
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volatile enum ME4600_AI_STATUS status; /**< The current stream status flag. */
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me4600_ai_timeout_t timeout; /**< The timeout for start in blocking and non-blocking mode. */
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/* Registers *//**< All registers are 32 bits long. */
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unsigned long ctrl_reg;
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unsigned long status_reg;
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unsigned long channel_list_reg;
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unsigned long data_reg;
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unsigned long chan_timer_reg;
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unsigned long chan_pre_timer_reg;
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unsigned long scan_timer_low_reg;
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unsigned long scan_timer_high_reg;
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unsigned long scan_pre_timer_low_reg;
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unsigned long scan_pre_timer_high_reg;
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unsigned long start_reg;
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unsigned long irq_status_reg;
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unsigned long sample_counter_reg;
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unsigned int ranges_len;
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me4600_range_entry_t ranges[4]; /**< The ranges available on this subdevice. */
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/* Software buffer */
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me_circ_buf_t circ_buf; /**< Circular buffer holding measurment data. */
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wait_queue_head_t wait_queue; /**< Wait queue to put on tasks waiting for data to arrive. */
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struct workqueue_struct *me4600_workqueue;
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struct delayed_work ai_control_task;
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volatile int ai_control_task_flag; /**< Flag controling reexecuting of control task */
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#ifdef MEDEBUG_DEBUG_REG
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unsigned long reg_base;
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#endif
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} me4600_ai_subdevice_t;
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/**
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* @brief The constructor to generate a ME-4000 analog input subdevice instance.
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*
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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 channels The number of analog input channels available on this subdevice.
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* @param channels The number of analog input ranges available on this subdevice.
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* @param isolated Flag indicating if this device is opto isolated.
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* @param sh Flag indicating if sample and hold devices are available.
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* @param irq The irq number assigned by PCI BIOS.
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* @param ctrl_reg_lock Pointer to spin lock protecting the control register 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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me4600_ai_subdevice_t *me4600_ai_constructor(uint32_t reg_base,
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unsigned int channels,
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unsigned int ranges,
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int isolated,
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int sh,
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int irq,
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spinlock_t * ctrl_reg_lock,
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struct workqueue_struct
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*me4600_wq);
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#endif
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#endif
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