/* comedi/drivers/adq12b.c driver for MicroAxial ADQ12-B data acquisition and control card COMEDI - Linux Control and Measurement Device Interface Copyright (C) 2000 David A. Schleef 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: adq12b Description: driver for MicroAxial ADQ12-B data acquisition and control card Devices: [MicroAxial] ADQ12-B (adq12b) Author: jeremy theler Updated: Thu, 21 Feb 2008 02:56:27 -0300 Status: works Driver for the acquisition card ADQ12-B (without any add-on). - Analog input is subdevice 0 (16 channels single-ended or 8 differential) - Digital input is subdevice 1 (5 channels) - Digital output is subdevice 1 (8 channels) - The PACER is not supported in this version If you do not specify any options, they will default to # comedi_config /dev/comedi0 adq12b 0x300,0,0 option 1: I/O base address. The following table is provided as a help of the hardware jumpers. address jumper JADR 0x300 1 (factory default) 0x320 2 0x340 3 0x360 4 0x380 5 0x3A0 6 option 2: unipolar/bipolar ADC selection: 0 -> bipolar, 1 -> unipolar selection comedi_config option JUB bipolar 0 2-3 (factory default) unipolar 1 1-2 option 3: single-ended/differential AI selection: 0 -> SE, 1 -> differential selection comedi_config option JCHA JCHB single-ended 0 1-2 1-2 (factory default) differential 1 2-3 2-3 written by jeremy theler instituto balseiro commission nacional de energia atomica universidad nacional de cuyo argentina 21-feb-2008 + changed supported devices string (missused the [] and ()) 13-oct-2007 + first try */ #include #include #include "../comedidev.h" /* address scheme (page 2.17 of the manual) */ #define ADQ12B_CTREG 0x00 #define ADQ12B_CTREG_MSKP (1 << 7) /* enable pacer interrupt */ #define ADQ12B_CTREG_GTP (1 << 6) /* enable pacer */ #define ADQ12B_CTREG_RANGE(x) ((x) << 4) #define ADQ12B_CTREG_CHAN(x) ((x) << 0) #define ADQ12B_STINR 0x00 #define ADQ12B_STINR_OUT2 (1 << 7) /* timer 2 output state */ #define ADQ12B_STINR_OUTP (1 << 6) /* pacer output state */ #define ADQ12B_STINR_EOC (1 << 5) /* A/D end-of-conversion */ #define ADQ12B_STINR_IN_MASK (0x1f << 0) #define ADQ12B_OUTBR 0x04 #define ADQ12B_ADLOW 0x08 #define ADQ12B_ADHIG 0x09 #define ADQ12B_TIMER_BASE 0x0c /* available ranges through the PGA gains */ static const struct comedi_lrange range_adq12b_ai_bipolar = { 4, { BIP_RANGE(5), BIP_RANGE(2), BIP_RANGE(1), BIP_RANGE(0.5) } }; static const struct comedi_lrange range_adq12b_ai_unipolar = { 4, { UNI_RANGE(5), UNI_RANGE(2), UNI_RANGE(1), UNI_RANGE(0.5) } }; struct adq12b_private { unsigned int last_ctreg; }; static int adq12b_ai_eoc(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned long context) { unsigned char status; status = inb(dev->iobase + ADQ12B_STINR); if (status & ADQ12B_STINR_EOC) return 0; return -EBUSY; } static int adq12b_ai_insn_read(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { struct adq12b_private *devpriv = dev->private; unsigned int chan = CR_CHAN(insn->chanspec); unsigned int range = CR_RANGE(insn->chanspec); unsigned int val; int ret; int i; /* change channel and range only if it is different from the previous */ val = ADQ12B_CTREG_RANGE(range) | ADQ12B_CTREG_CHAN(chan); if (val != devpriv->last_ctreg) { outb(val, dev->iobase + ADQ12B_CTREG); devpriv->last_ctreg = val; udelay(50); /* wait for the mux to settle */ } val = inb(dev->iobase + ADQ12B_ADLOW); /* trigger A/D */ for (i = 0; i < insn->n; i++) { ret = comedi_timeout(dev, s, insn, adq12b_ai_eoc, 0); if (ret) return ret; val = inb(dev->iobase + ADQ12B_ADHIG) << 8; val |= inb(dev->iobase + ADQ12B_ADLOW); /* retriggers A/D */ data[i] = val; } return insn->n; } static int adq12b_di_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { /* only bits 0-4 have information about digital inputs */ data[1] = (inb(dev->iobase + ADQ12B_STINR) & ADQ12B_STINR_IN_MASK); return insn->n; } static int adq12b_do_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { unsigned int mask; unsigned int chan; unsigned int val; mask = comedi_dio_update_state(s, data); if (mask) { for (chan = 0; chan < 8; chan++) { if ((mask >> chan) & 0x01) { val = (s->state >> chan) & 0x01; outb((val << 3) | chan, dev->iobase + ADQ12B_OUTBR); } } } data[1] = s->state; return insn->n; } static int adq12b_attach(struct comedi_device *dev, struct comedi_devconfig *it) { struct adq12b_private *devpriv; struct comedi_subdevice *s; int ret; ret = comedi_request_region(dev, it->options[0], 0x10); if (ret) return ret; devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv)); if (!devpriv) return -ENOMEM; devpriv->last_ctreg = -1; /* force ctreg update */ ret = comedi_alloc_subdevices(dev, 3); if (ret) return ret; /* Analog Input subdevice */ s = &dev->subdevices[0]; s->type = COMEDI_SUBD_AI; if (it->options[2]) { s->subdev_flags = SDF_READABLE | SDF_DIFF; s->n_chan = 8; } else { s->subdev_flags = SDF_READABLE | SDF_GROUND; s->n_chan = 16; } s->maxdata = 0xfff; s->range_table = it->options[1] ? &range_adq12b_ai_unipolar : &range_adq12b_ai_bipolar; s->insn_read = adq12b_ai_insn_read; /* Digital Input subdevice */ s = &dev->subdevices[1]; s->type = COMEDI_SUBD_DI; s->subdev_flags = SDF_READABLE; s->n_chan = 5; s->maxdata = 1; s->range_table = &range_digital; s->insn_bits = adq12b_di_insn_bits; /* Digital Output subdevice */ s = &dev->subdevices[2]; s->type = COMEDI_SUBD_DO; s->subdev_flags = SDF_WRITABLE; s->n_chan = 8; s->maxdata = 1; s->range_table = &range_digital; s->insn_bits = adq12b_do_insn_bits; return 0; } static struct comedi_driver adq12b_driver = { .driver_name = "adq12b", .module = THIS_MODULE, .attach = adq12b_attach, .detach = comedi_legacy_detach, }; module_comedi_driver(adq12b_driver); MODULE_AUTHOR("Comedi http://www.comedi.org"); MODULE_DESCRIPTION("Comedi low-level driver"); MODULE_LICENSE("GPL");