/* 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. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* 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 "../comedidev.h" #include #include static const struct comedi_lrange range_dt2815_ao_32_current = { 1, { RANGE_mA(0, 32) } }; static const struct comedi_lrange range_dt2815_ao_20_current = { 1, { RANGE_mA(4, 20) } }; #define DT2815_SIZE 2 #define DT2815_DATA 0 #define DT2815_STATUS 1 static int dt2815_attach(struct comedi_device *dev, struct comedi_devconfig *it); static int dt2815_detach(struct comedi_device *dev); static struct comedi_driver driver_dt2815 = { .driver_name = "dt2815", .module = THIS_MODULE, .attach = dt2815_attach, .detach = dt2815_detach, }; COMEDI_INITCLEANUP(driver_dt2815); static void dt2815_free_resources(struct comedi_device *dev); struct dt2815_private { const struct comedi_lrange *range_type_list[8]; unsigned int ao_readback[8]; }; #define devpriv ((struct dt2815_private *)dev->private) static int dt2815_wait_for_status(struct comedi_device *dev, int status) { int i; for (i = 0; i < 100; i++) { if (inb(dev->iobase + DT2815_STATUS) == status) break; } return status; } static int dt2815_ao_insn_read(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { 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) { int i; int chan = CR_CHAN(insn->chanspec); unsigned int status; unsigned int lo, hi; for (i = 0; i < insn->n; i++) { lo = ((data[i] & 0x0f) << 4) | (chan << 1) | 0x01; hi = (data[i] & 0xff0) >> 4; status = dt2815_wait_for_status(dev, 0x00); if (status != 0) { printk ("dt2815: failed to write low byte on %d reason %x\n", chan, status); return -EBUSY; } outb(lo, dev->iobase + DT2815_DATA); status = dt2815_wait_for_status(dev, 0x10); if (status != 0x10) { printk ("dt2815: failed to write high byte on %d reason %x\n", chan, status); return -EBUSY; } 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 comedi_subdevice *s; int i; const struct comedi_lrange *current_range_type, *voltage_range_type; unsigned long iobase; iobase = it->options[0]; printk("comedi%d: dt2815: 0x%04lx ", dev->minor, iobase); if (!request_region(iobase, DT2815_SIZE, "dt2815")) { printk("I/O port conflict\n"); return -EIO; } dev->iobase = iobase; dev->board_name = "dt2815"; if (alloc_subdevices(dev, 1) < 0) return -ENOMEM; if (alloc_private(dev, sizeof(struct dt2815_private)) < 0) return -ENOMEM; s = dev->subdevices; /* 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_dt2815_ao_20_current : &range_dt2815_ao_32_current; 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); printk(", program: 0x%x (@t=%d)\n", program, i); break; } else if (status != 0x00) { printk("dt2815: unexpected status 0x%x (@t=%d)\n", status, i); if (status & 0x60) { outb(0x00, dev->iobase + DT2815_STATUS); } } } printk("\n"); return 0; } static void dt2815_free_resources(struct comedi_device *dev) { if (dev->iobase) release_region(dev->iobase, DT2815_SIZE); } static int dt2815_detach(struct comedi_device *dev) { printk("comedi%d: dt2815: remove\n", dev->minor); dt2815_free_resources(dev); return 0; }