diff options
Diffstat (limited to 'drivers/comedi/drivers/adq12b.c')
-rw-r--r-- | drivers/comedi/drivers/adq12b.c | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/drivers/comedi/drivers/adq12b.c b/drivers/comedi/drivers/adq12b.c new file mode 100644 index 000000000000..d719f76709ef --- /dev/null +++ b/drivers/comedi/drivers/adq12b.c @@ -0,0 +1,243 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * adq12b.c + * Driver for MicroAxial ADQ12-B data acquisition and control card + * written by jeremy theler <thelerg@ib.cnea.gov.ar> + * instituto balseiro + * commission nacional de energia atomica + * universidad nacional de cuyo + * argentina + * + * COMEDI - Linux Control and Measurement Device Interface + * Copyright (C) 2000 David A. Schleef <ds@schleef.org> + */ + +/* + * Driver: adq12b + * Description: Driver for MicroAxial ADQ12-B data acquisition and control card + * Devices: [MicroAxial] ADQ12-B (adq12b) + * Author: jeremy theler <thelerg@ib.cnea.gov.ar> + * Updated: Thu, 21 Feb 2008 02:56:27 -0300 + * Status: works + * + * Configuration options: + * [0] - I/O base address (set with hardware jumpers) + * address jumper JADR + * 0x300 1 (factory default) + * 0x320 2 + * 0x340 3 + * 0x360 4 + * 0x380 5 + * 0x3A0 6 + * [1] - Analog Input unipolar/bipolar selection + * selection option JUB + * bipolar 0 2-3 (factory default) + * unipolar 1 1-2 + * [2] - Analog Input single-ended/differential selection + * selection option JCHA JCHB + * single-ended 0 1-2 1-2 (factory default) + * differential 1 2-3 2-3 + * + * 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 + */ + +#include <linux/module.h> +#include <linux/delay.h> + +#include "../comedidev.h" + +/* address scheme (page 2.17 of the manual) */ +#define ADQ12B_CTREG 0x00 +#define ADQ12B_CTREG_MSKP BIT(7) /* enable pacer interrupt */ +#define ADQ12B_CTREG_GTP BIT(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 BIT(7) /* timer 2 output state */ +#define ADQ12B_STINR_OUTP BIT(6) /* pacer output state */ +#define ADQ12B_STINR_EOC BIT(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; + usleep_range(50, 100); /* 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 https://www.comedi.org"); +MODULE_DESCRIPTION("Comedi low-level driver"); +MODULE_LICENSE("GPL"); |