1/* 2 * fl512.c 3 * Anders Gnistrup <ex18@kalman.iau.dtu.dk> 4 * 5 * COMEDI - Linux Control and Measurement Device Interface 6 * Copyright (C) 2000 David A. Schleef <ds@schleef.org> 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/* 20 * Driver: fl512 21 * Description: unknown 22 * Author: Anders Gnistrup <ex18@kalman.iau.dtu.dk> 23 * Devices: [unknown] FL512 (fl512) 24 * Status: unknown 25 * 26 * Digital I/O is not supported. 27 * 28 * Configuration options: 29 * [0] - I/O port base address 30 */ 31 32#include <linux/module.h> 33#include "../comedidev.h" 34 35#include <linux/delay.h> 36 37/* 38 * Register I/O map 39 */ 40#define FL512_AI_LSB_REG 0x02 41#define FL512_AI_MSB_REG 0x03 42#define FL512_AI_MUX_REG 0x02 43#define FL512_AI_START_CONV_REG 0x03 44#define FL512_AO_DATA_REG(x) (0x04 + ((x) * 2)) 45#define FL512_AO_TRIG_REG(x) (0x04 + ((x) * 2)) 46 47static const struct comedi_lrange range_fl512 = { 48 4, { 49 BIP_RANGE(0.5), 50 BIP_RANGE(1), 51 BIP_RANGE(5), 52 BIP_RANGE(10), 53 UNI_RANGE(1), 54 UNI_RANGE(5), 55 UNI_RANGE(10) 56 } 57}; 58 59static int fl512_ai_insn_read(struct comedi_device *dev, 60 struct comedi_subdevice *s, 61 struct comedi_insn *insn, 62 unsigned int *data) 63{ 64 unsigned int chan = CR_CHAN(insn->chanspec); 65 unsigned int val; 66 int i; 67 68 outb(chan, dev->iobase + FL512_AI_MUX_REG); 69 70 for (i = 0; i < insn->n; i++) { 71 outb(0, dev->iobase + FL512_AI_START_CONV_REG); 72 73 /* XXX should test "done" flag instead of delay */ 74 udelay(30); 75 76 val = inb(dev->iobase + FL512_AI_LSB_REG); 77 val |= (inb(dev->iobase + FL512_AI_MSB_REG) << 8); 78 val &= s->maxdata; 79 80 data[i] = val; 81 } 82 83 return insn->n; 84} 85 86static int fl512_ao_insn_write(struct comedi_device *dev, 87 struct comedi_subdevice *s, 88 struct comedi_insn *insn, 89 unsigned int *data) 90{ 91 unsigned int chan = CR_CHAN(insn->chanspec); 92 unsigned int val = s->readback[chan]; 93 int i; 94 95 for (i = 0; i < insn->n; i++) { 96 val = data[i]; 97 98 /* write LSB, MSB then trigger conversion */ 99 outb(val & 0x0ff, dev->iobase + FL512_AO_DATA_REG(chan)); 100 outb((val >> 8) & 0xf, dev->iobase + FL512_AO_DATA_REG(chan)); 101 inb(dev->iobase + FL512_AO_TRIG_REG(chan)); 102 } 103 s->readback[chan] = val; 104 105 return insn->n; 106} 107 108static int fl512_attach(struct comedi_device *dev, struct comedi_devconfig *it) 109{ 110 struct comedi_subdevice *s; 111 int ret; 112 113 ret = comedi_request_region(dev, it->options[0], 0x10); 114 if (ret) 115 return ret; 116 117 ret = comedi_alloc_subdevices(dev, 2); 118 if (ret) 119 return ret; 120 121 /* Analog Input subdevice */ 122 s = &dev->subdevices[0]; 123 s->type = COMEDI_SUBD_AI; 124 s->subdev_flags = SDF_READABLE | SDF_GROUND; 125 s->n_chan = 16; 126 s->maxdata = 0x0fff; 127 s->range_table = &range_fl512; 128 s->insn_read = fl512_ai_insn_read; 129 130 /* Analog Output subdevice */ 131 s = &dev->subdevices[1]; 132 s->type = COMEDI_SUBD_AO; 133 s->subdev_flags = SDF_WRITABLE; 134 s->n_chan = 2; 135 s->maxdata = 0x0fff; 136 s->range_table = &range_fl512; 137 s->insn_write = fl512_ao_insn_write; 138 s->insn_read = comedi_readback_insn_read; 139 140 ret = comedi_alloc_subdev_readback(s); 141 if (ret) 142 return ret; 143 144 return 0; 145} 146 147static struct comedi_driver fl512_driver = { 148 .driver_name = "fl512", 149 .module = THIS_MODULE, 150 .attach = fl512_attach, 151 .detach = comedi_legacy_detach, 152}; 153module_comedi_driver(fl512_driver); 154 155MODULE_AUTHOR("Comedi http://www.comedi.org"); 156MODULE_DESCRIPTION("Comedi low-level driver"); 157MODULE_LICENSE("GPL"); 158