dt2815.c revision 71b5f4f11971dea972832ad63a994c7e5b45db6b
1/* 2 comedi/drivers/dt2815.c 3 Hardware driver for Data Translation DT2815 4 5 COMEDI - Linux Control and Measurement Device Interface 6 Copyright (C) 1999 Anders Blomdell <anders.blomdell@control.lth.se> 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 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the Free Software 20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 22 */ 23/* 24Driver: dt2815 25Description: Data Translation DT2815 26Author: ds 27Status: mostly complete, untested 28Devices: [Data Translation] DT2815 (dt2815) 29 30I'm not sure anyone has ever tested this board. If you have information 31contrary, please update. 32 33Configuration options: 34 [0] - I/O port base base address 35 [1] - IRQ (unused) 36 [2] - Voltage unipolar/bipolar configuration 37 0 == unipolar 5V (0V -- +5V) 38 1 == bipolar 5V (-5V -- +5V) 39 [3] - Current offset configuration 40 0 == disabled (0mA -- +32mAV) 41 1 == enabled (+4mA -- +20mAV) 42 [4] - Firmware program configuration 43 0 == program 1 (see manual table 5-4) 44 1 == program 2 (see manual table 5-4) 45 2 == program 3 (see manual table 5-4) 46 3 == program 4 (see manual table 5-4) 47 [5] - Analog output 0 range configuration 48 0 == voltage 49 1 == current 50 [6] - Analog output 1 range configuration (same options) 51 [7] - Analog output 2 range configuration (same options) 52 [8] - Analog output 3 range configuration (same options) 53 [9] - Analog output 4 range configuration (same options) 54 [10] - Analog output 5 range configuration (same options) 55 [11] - Analog output 6 range configuration (same options) 56 [12] - Analog output 7 range configuration (same options) 57*/ 58 59#include "../comedidev.h" 60 61#include <linux/ioport.h> 62#include <linux/delay.h> 63 64static const comedi_lrange range_dt2815_ao_32_current = { 1, { 65 RANGE_mA(0, 32) 66 } 67}; 68static const comedi_lrange range_dt2815_ao_20_current = { 1, { 69 RANGE_mA(4, 20) 70 } 71}; 72 73#define DT2815_SIZE 2 74 75#define DT2815_DATA 0 76#define DT2815_STATUS 1 77 78static int dt2815_attach(struct comedi_device * dev, comedi_devconfig * it); 79static int dt2815_detach(struct comedi_device * dev); 80static comedi_driver driver_dt2815 = { 81 driver_name:"dt2815", 82 module:THIS_MODULE, 83 attach:dt2815_attach, 84 detach:dt2815_detach, 85}; 86 87COMEDI_INITCLEANUP(driver_dt2815); 88 89static void dt2815_free_resources(struct comedi_device * dev); 90 91typedef struct { 92 const comedi_lrange *range_type_list[8]; 93 unsigned int ao_readback[8]; 94} dt2815_private; 95 96#define devpriv ((dt2815_private *)dev->private) 97 98static int dt2815_wait_for_status(struct comedi_device * dev, int status) 99{ 100 int i; 101 102 for (i = 0; i < 100; i++) { 103 if (inb(dev->iobase + DT2815_STATUS) == status) 104 break; 105 } 106 return status; 107} 108 109static int dt2815_ao_insn_read(struct comedi_device * dev, comedi_subdevice * s, 110 comedi_insn * insn, unsigned int * data) 111{ 112 int i; 113 int chan = CR_CHAN(insn->chanspec); 114 115 for (i = 0; i < insn->n; i++) { 116 data[i] = devpriv->ao_readback[chan]; 117 } 118 119 return i; 120} 121 122static int dt2815_ao_insn(struct comedi_device * dev, comedi_subdevice * s, 123 comedi_insn * insn, unsigned int * data) 124{ 125 int i; 126 int chan = CR_CHAN(insn->chanspec); 127 unsigned int status; 128 unsigned int lo, hi; 129 130 for (i = 0; i < insn->n; i++) { 131 lo = ((data[i] & 0x0f) << 4) | (chan << 1) | 0x01; 132 hi = (data[i] & 0xff0) >> 4; 133 134 status = dt2815_wait_for_status(dev, 0x00); 135 if (status != 0) { 136 rt_printk 137 ("dt2815: failed to write low byte on %d reason %x\n", 138 chan, status); 139 return -EBUSY; 140 } 141 142 outb(lo, dev->iobase + DT2815_DATA); 143 144 status = dt2815_wait_for_status(dev, 0x10); 145 if (status != 0x10) { 146 rt_printk 147 ("dt2815: failed to write high byte on %d reason %x\n", 148 chan, status); 149 return -EBUSY; 150 } 151 devpriv->ao_readback[chan] = data[i]; 152 } 153 return i; 154} 155 156/* 157 options[0] Board base address 158 options[1] IRQ (not applicable) 159 options[2] Voltage unipolar/bipolar configuration 160 0 == unipolar 5V (0V -- +5V) 161 1 == bipolar 5V (-5V -- +5V) 162 options[3] Current offset configuration 163 0 == disabled (0mA -- +32mAV) 164 1 == enabled (+4mA -- +20mAV) 165 options[4] Firmware program configuration 166 0 == program 1 (see manual table 5-4) 167 1 == program 2 (see manual table 5-4) 168 2 == program 3 (see manual table 5-4) 169 3 == program 4 (see manual table 5-4) 170 options[5] Analog output 0 range configuration 171 0 == voltage 172 1 == current 173 options[6] Analog output 1 range configuration 174 ... 175 options[12] Analog output 7 range configuration 176 0 == voltage 177 1 == current 178 */ 179 180static int dt2815_attach(struct comedi_device * dev, comedi_devconfig * it) 181{ 182 comedi_subdevice *s; 183 int i; 184 const comedi_lrange *current_range_type, *voltage_range_type; 185 unsigned long iobase; 186 187 iobase = it->options[0]; 188 printk("comedi%d: dt2815: 0x%04lx ", dev->minor, iobase); 189 if (!request_region(iobase, DT2815_SIZE, "dt2815")) { 190 printk("I/O port conflict\n"); 191 return -EIO; 192 } 193 194 dev->iobase = iobase; 195 dev->board_name = "dt2815"; 196 197 if (alloc_subdevices(dev, 1) < 0) 198 return -ENOMEM; 199 if (alloc_private(dev, sizeof(dt2815_private)) < 0) 200 return -ENOMEM; 201 202 s = dev->subdevices; 203 /* ao subdevice */ 204 s->type = COMEDI_SUBD_AO; 205 s->subdev_flags = SDF_WRITABLE; 206 s->maxdata = 0xfff; 207 s->n_chan = 8; 208 s->insn_write = dt2815_ao_insn; 209 s->insn_read = dt2815_ao_insn_read; 210 s->range_table_list = devpriv->range_type_list; 211 212 current_range_type = (it->options[3]) 213 ? &range_dt2815_ao_20_current : &range_dt2815_ao_32_current; 214 voltage_range_type = (it->options[2]) 215 ? &range_bipolar5 : &range_unipolar5; 216 for (i = 0; i < 8; i++) { 217 devpriv->range_type_list[i] = (it->options[5 + i]) 218 ? current_range_type : voltage_range_type; 219 } 220 221 /* Init the 2815 */ 222 outb(0x00, dev->iobase + DT2815_STATUS); 223 for (i = 0; i < 100; i++) { 224 /* This is incredibly slow (approx 20 ms) */ 225 unsigned int status; 226 227 comedi_udelay(1000); 228 status = inb(dev->iobase + DT2815_STATUS); 229 if (status == 4) { 230 unsigned int program; 231 program = (it->options[4] & 0x3) << 3 | 0x7; 232 outb(program, dev->iobase + DT2815_DATA); 233 printk(", program: 0x%x (@t=%d)\n", program, i); 234 break; 235 } else if (status != 0x00) { 236 printk("dt2815: unexpected status 0x%x (@t=%d)\n", 237 status, i); 238 if (status & 0x60) { 239 outb(0x00, dev->iobase + DT2815_STATUS); 240 } 241 } 242 } 243 244 printk("\n"); 245 246 return 0; 247} 248 249static void dt2815_free_resources(struct comedi_device * dev) 250{ 251 if (dev->iobase) 252 release_region(dev->iobase, DT2815_SIZE); 253} 254 255static int dt2815_detach(struct comedi_device * dev) 256{ 257 printk("comedi%d: dt2815: remove\n", dev->minor); 258 259 dt2815_free_resources(dev); 260 261 return 0; 262} 263