/* comedi/drivers/dt2815.c Hardware driver for Data Translation DT2815 COMEDI - Linux Control and Measurement Device Interface Copyright (C) 1999 Anders Blomdell 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. */ /* Driver: dt2815 Description: Data Translation DT2815 Author: ds Status: mostly complete, untested Devices: [Data Translation] DT2815 (dt2815) I'm not sure anyone has ever tested this board. If you have information contrary, please update. Configuration options: [0] - I/O port base base address [1] - IRQ (unused) [2] - Voltage unipolar/bipolar configuration 0 == unipolar 5V (0V -- +5V) 1 == bipolar 5V (-5V -- +5V) [3] - Current offset configuration 0 == disabled (0mA -- +32mAV) 1 == enabled (+4mA -- +20mAV) [4] - Firmware program configuration 0 == program 1 (see manual table 5-4) 1 == program 2 (see manual table 5-4) 2 == program 3 (see manual table 5-4) 3 == program 4 (see manual table 5-4) [5] - Analog output 0 range configuration 0 == voltage 1 == current [6] - Analog output 1 range configuration (same options) [7] - Analog output 2 range configuration (same options) [8] - Analog output 3 range configuration (same options) [9] - Analog output 4 range configuration (same options) [10] - Analog output 5 range configuration (same options) [11] - Analog output 6 range configuration (same options) [12] - Analog output 7 range configuration (same options) */ #include #include "../comedidev.h" #include #define DT2815_DATA 0 #define DT2815_STATUS 1 struct dt2815_private { const struct comedi_lrange *range_type_list[8]; unsigned int ao_readback[8]; }; static int dt2815_ao_status(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned long context) { unsigned int status; status = inb(dev->iobase + DT2815_STATUS); if (status == context) return 0; return -EBUSY; } static int dt2815_ao_insn_read(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { struct dt2815_private *devpriv = dev->private; int i; int chan = CR_CHAN(insn->chanspec); for (i = 0; i < insn->n; i++) data[i] = devpriv->ao_readback[chan]; return i; } static int dt2815_ao_insn(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { struct dt2815_private *devpriv = dev->private; int i; int chan = CR_CHAN(insn->chanspec); unsigned int lo, hi; int ret; for (i = 0; i < insn->n; i++) { lo = ((data[i] & 0x0f) << 4) | (chan << 1) | 0x01; hi = (data[i] & 0xff0) >> 4; ret = comedi_timeout(dev, s, insn, dt2815_ao_status, 0x00); if (ret) return ret; outb(lo, dev->iobase + DT2815_DATA); ret = comedi_timeout(dev, s, insn, dt2815_ao_status, 0x10); if (ret) return ret; devpriv->ao_readback[chan] = data[i]; } return i; } /* options[0] Board base address options[1] IRQ (not applicable) options[2] Voltage unipolar/bipolar configuration 0 == unipolar 5V (0V -- +5V) 1 == bipolar 5V (-5V -- +5V) options[3] Current offset configuration 0 == disabled (0mA -- +32mAV) 1 == enabled (+4mA -- +20mAV) options[4] Firmware program configuration 0 == program 1 (see manual table 5-4) 1 == program 2 (see manual table 5-4) 2 == program 3 (see manual table 5-4) 3 == program 4 (see manual table 5-4) options[5] Analog output 0 range configuration 0 == voltage 1 == current options[6] Analog output 1 range configuration ... options[12] Analog output 7 range configuration 0 == voltage 1 == current */ static int dt2815_attach(struct comedi_device *dev, struct comedi_devconfig *it) { struct dt2815_private *devpriv; struct comedi_subdevice *s; int i; const struct comedi_lrange *current_range_type, *voltage_range_type; int ret; ret = comedi_request_region(dev, it->options[0], 0x2); if (ret) return ret; ret = comedi_alloc_subdevices(dev, 1); if (ret) return ret; devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv)); if (!devpriv) return -ENOMEM; s = &dev->subdevices[0]; /* ao subdevice */ s->type = COMEDI_SUBD_AO; s->subdev_flags = SDF_WRITABLE; s->maxdata = 0xfff; s->n_chan = 8; s->insn_write = dt2815_ao_insn; s->insn_read = dt2815_ao_insn_read; s->range_table_list = devpriv->range_type_list; current_range_type = (it->options[3]) ? &range_4_20mA : &range_0_32mA; voltage_range_type = (it->options[2]) ? &range_bipolar5 : &range_unipolar5; for (i = 0; i < 8; i++) { devpriv->range_type_list[i] = (it->options[5 + i]) ? current_range_type : voltage_range_type; } /* Init the 2815 */ outb(0x00, dev->iobase + DT2815_STATUS); for (i = 0; i < 100; i++) { /* This is incredibly slow (approx 20 ms) */ unsigned int status; udelay(1000); status = inb(dev->iobase + DT2815_STATUS); if (status == 4) { unsigned int program; program = (it->options[4] & 0x3) << 3 | 0x7; outb(program, dev->iobase + DT2815_DATA); dev_dbg(dev->class_dev, "program: 0x%x (@t=%d)\n", program, i); break; } else if (status != 0x00) { dev_dbg(dev->class_dev, "unexpected status 0x%x (@t=%d)\n", status, i); if (status & 0x60) outb(0x00, dev->iobase + DT2815_STATUS); } } return 0; } static struct comedi_driver dt2815_driver = { .driver_name = "dt2815", .module = THIS_MODULE, .attach = dt2815_attach, .detach = comedi_legacy_detach, }; module_comedi_driver(dt2815_driver); MODULE_AUTHOR("Comedi http://www.comedi.org"); MODULE_DESCRIPTION("Comedi low-level driver"); MODULE_LICENSE("GPL");