drivers/staging/comedi/drivers/ni_labpc.h

   1 /*
   2     ni_labpc.h
   3
   4     Header for ni_labpc.c and ni_labpc_cs.c
   5
   6     Copyright (C) 2003 Frank Mori Hess <fmhess@users.sourceforge.net>
   7
   8     This program is free software; you can redistribute it and/or modify
   9     it under the terms of the GNU General Public License as published by
  10     the Free Software Foundation; either version 2 of the License, or
  11     (at your option) any later version.
  12
  13     This program is distributed in the hope that it will be useful,
  14     but WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16     GNU General Public License for more details.
  17 */
  18
  19 #ifndef _NI_LABPC_H
  20 #define _NI_LABPC_H
  21
  22 #define EEPROM_SIZE     256     /*  256 byte eeprom */
  23 #define NUM_AO_CHAN     2       /*  boards have two analog output channels */
  24
  25 enum transfer_type { fifo_not_empty_transfer, fifo_half_full_transfer,
  26         isa_dma_transfer
  27 };
  28
  29 struct labpc_boardinfo {
  30         const char *name;
  31         int ai_speed;                   /* maximum input speed in ns */
  32         unsigned ai_scan_up:1;          /* can auto scan up in ai channels */
  33         unsigned has_ao:1;              /* has analog outputs */
  34         unsigned is_labpc1200:1;        /* has extra regs compared to pc+ */
  35 };
  36
  37 struct labpc_private {
  38         /*  number of data points left to be taken */
  39         unsigned long long count;
  40         /*  software copy of analog output values */
  41         unsigned int ao_value[NUM_AO_CHAN];
  42         /*  software copys of bits written to command registers */
  43         unsigned int cmd1;
  44         unsigned int cmd2;
  45         unsigned int cmd3;
  46         unsigned int cmd4;
  47         unsigned int cmd5;
  48         unsigned int cmd6;
  49         /*  store last read of board status registers */
  50         unsigned int stat1;
  51         unsigned int stat2;
  52         /*
  53          * value to load into board's counter a0 (conversion pacing) for timed
  54          * conversions
  55          */
  56         unsigned int divisor_a0;
  57         /*
  58          * value to load into board's counter b0 (master) for timed conversions
  59          */
  60         unsigned int divisor_b0;
  61         /*
  62          * value to load into board's counter b1 (scan pacing) for timed
  63          * conversions
  64          */
  65         unsigned int divisor_b1;
  66         unsigned int dma_chan;  /*  dma channel to use */
  67         u16 *dma_buffer;        /*  buffer ai will dma into */
  68         phys_addr_t dma_addr;
  69         /* transfer size in bytes for current transfer */
  70         unsigned int dma_transfer_size;
  71         /* we are using dma/fifo-half-full/etc. */
  72         enum transfer_type current_transfer;
  73         /* stores contents of board's eeprom */
  74         unsigned int eeprom_data[EEPROM_SIZE];
  75         /* stores settings of calibration dacs */
  76         unsigned int caldac[16];
  77         /*
  78          * function pointers so we can use inb/outb or readb/writeb as
  79          * appropriate
  80          */
  81         unsigned int (*read_byte)(struct comedi_device *, unsigned long reg);
  82         void (*write_byte)(struct comedi_device *,
  83                            unsigned int byte, unsigned long reg);
  84 };
  85
  86 int labpc_common_attach(struct comedi_device *dev,
  87                         unsigned int irq, unsigned long isr_flags);
  88
  89 #endif /* _NI_LABPC_H */