ni_labpc.h

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/*
    ni_labpc.h

    Header for ni_labpc.c and ni_labpc_cs.c

    Copyright (C) 2003 Frank Mori Hess <[email protected]>

    This program 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 _NI_LABPC_H
#define _NI_LABPC_H

#define EEPROM_SIZE 256 /*  256 byte eeprom */
#define NUM_AO_CHAN 2   /*  boards have two analog output channels */

enum labpc_bustype { isa_bustype, pci_bustype, pcmcia_bustype };
enum labpc_register_layout { labpc_plus_layout, labpc_1200_layout };
enum transfer_type { fifo_not_empty_transfer, fifo_half_full_transfer,
    isa_dma_transfer
};

struct labpc_board_struct {
    const char *name;
    int device_id;      /*  device id for pci and pcmcia boards */
    int ai_speed;       /*  maximum input speed in nanoseconds */
    enum labpc_bustype bustype; /*  ISA/PCI/etc. */

    /*  1200 has extra registers compared to pc+ */
    enum labpc_register_layout register_layout;
    int has_ao;     /*  has analog output true/false */
    const struct comedi_lrange *ai_range_table;
    const int *ai_range_code;
    const int *ai_range_is_unipolar;

    /*  board can auto scan up in ai channels, not just down */
    unsigned ai_scan_up:1;

    /* uses memory mapped io instead of ioports */
    unsigned memory_mapped_io:1;
};

struct labpc_private {
    struct mite_struct *mite;   /*  for mite chip on pci-1200 */
    /*  number of data points left to be taken */
    volatile unsigned long long count;
    /*  software copy of analog output values */
    unsigned int ao_value[NUM_AO_CHAN];
    /*  software copys of bits written to command registers */
    volatile unsigned int command1_bits;
    volatile unsigned int command2_bits;
    volatile unsigned int command3_bits;
    volatile unsigned int command4_bits;
    volatile unsigned int command5_bits;
    volatile unsigned int command6_bits;
    /*  store last read of board status registers */
    volatile unsigned int status1_bits;
    volatile unsigned int status2_bits;
    /*
     * value to load into board's counter a0 (conversion pacing) for timed
     * conversions
     */
    unsigned int divisor_a0;
    /*
     * value to load into board's counter b0 (master) for timed conversions
     */
    unsigned int divisor_b0;
    /*
     * value to load into board's counter b1 (scan pacing) for timed
     * conversions
     */
    unsigned int divisor_b1;
    unsigned int dma_chan;  /*  dma channel to use */
    u16 *dma_buffer;    /*  buffer ai will dma into */
    /* transfer size in bytes for current transfer */
    unsigned int dma_transfer_size;
    /* we are using dma/fifo-half-full/etc. */
    enum transfer_type current_transfer;
    /* stores contents of board's eeprom */
    unsigned int eeprom_data[EEPROM_SIZE];
    /* stores settings of calibration dacs */
    unsigned int caldac[16];
    /*
     * function pointers so we can use inb/outb or readb/writeb as
     * appropriate
     */
    unsigned int (*read_byte) (unsigned long address);
    void (*write_byte) (unsigned int byte, unsigned long address);
};

int labpc_common_attach(struct comedi_device *dev, unsigned long iobase,
            unsigned int irq, unsigned int dma);
void labpc_common_detach(struct comedi_device *dev);

extern const int labpc_1200_is_unipolar[];
extern const int labpc_1200_ai_gain_bits[];
extern const struct comedi_lrange range_labpc_1200_ai;

#endif /* _NI_LABPC_H */