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_dma_desc {
  38         unsigned int chan;      /* DMA channel */
  39         void *virt_addr;        /* virtual address of DMA buffer */
  40         dma_addr_t hw_addr;     /* hardware (bus) address of DMA buffer */
  41         unsigned int size;      /* size of DMA transfer (in bytes) */
  42 };
  43
  44 struct labpc_private {
  45         /*  number of data points left to be taken */
  46         unsigned long long count;
  47         /*  software copys of bits written to command registers */
  48         unsigned int cmd1;
  49         unsigned int cmd2;
  50         unsigned int cmd3;
  51         unsigned int cmd4;
  52         unsigned int cmd5;
  53         unsigned int cmd6;
  54         /*  store last read of board status registers */
  55         unsigned int stat1;
  56         unsigned int stat2;
  57         /*
  58          * value to load into board's counter a0 (conversion pacing) for timed
  59          * conversions
  60          */
  61         unsigned int divisor_a0;
  62         /*
  63          * value to load into board's counter b0 (master) for timed conversions
  64          */
  65         unsigned int divisor_b0;
  66         /*
  67          * value to load into board's counter b1 (scan pacing) for timed
  68          * conversions
  69          */
  70         unsigned int divisor_b1;
  71
  72         struct labpc_dma_desc dma_desc;
  73
  74         /* we are using dma/fifo-half-full/etc. */
  75         enum transfer_type current_transfer;
  76         /*
  77          * function pointers so we can use inb/outb or readb/writeb as
  78          * appropriate
  79          */
  80         unsigned int (*read_byte)(struct comedi_device *, unsigned long reg);
  81         void (*write_byte)(struct comedi_device *,
  82                            unsigned int byte, unsigned long reg);
  83 };
  84
  85 int labpc_common_attach(struct comedi_device *dev,
  86                         unsigned int irq, unsigned long isr_flags);
  87
  88 #endif /* _NI_LABPC_H */