diff options
Diffstat (limited to 'drivers/comedi/drivers/fl512.c')
-rw-r--r-- | drivers/comedi/drivers/fl512.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/drivers/comedi/drivers/fl512.c b/drivers/comedi/drivers/fl512.c new file mode 100644 index 000000000000..b715f30659fa --- /dev/null +++ b/drivers/comedi/drivers/fl512.c @@ -0,0 +1,143 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * fl512.c + * Anders Gnistrup <ex18@kalman.iau.dtu.dk> + * + * COMEDI - Linux Control and Measurement Device Interface + * Copyright (C) 2000 David A. Schleef <ds@schleef.org> + */ + +/* + * Driver: fl512 + * Description: unknown + * Author: Anders Gnistrup <ex18@kalman.iau.dtu.dk> + * Devices: [unknown] FL512 (fl512) + * Status: unknown + * + * Digital I/O is not supported. + * + * Configuration options: + * [0] - I/O port base address + */ + +#include <linux/module.h> +#include "../comedidev.h" + +#include <linux/delay.h> + +/* + * Register I/O map + */ +#define FL512_AI_LSB_REG 0x02 +#define FL512_AI_MSB_REG 0x03 +#define FL512_AI_MUX_REG 0x02 +#define FL512_AI_START_CONV_REG 0x03 +#define FL512_AO_DATA_REG(x) (0x04 + ((x) * 2)) +#define FL512_AO_TRIG_REG(x) (0x04 + ((x) * 2)) + +static const struct comedi_lrange range_fl512 = { + 4, { + BIP_RANGE(0.5), + BIP_RANGE(1), + BIP_RANGE(5), + BIP_RANGE(10), + UNI_RANGE(1), + UNI_RANGE(5), + UNI_RANGE(10) + } +}; + +static int fl512_ai_insn_read(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) +{ + unsigned int chan = CR_CHAN(insn->chanspec); + unsigned int val; + int i; + + outb(chan, dev->iobase + FL512_AI_MUX_REG); + + for (i = 0; i < insn->n; i++) { + outb(0, dev->iobase + FL512_AI_START_CONV_REG); + + /* XXX should test "done" flag instead of delay */ + usleep_range(30, 100); + + val = inb(dev->iobase + FL512_AI_LSB_REG); + val |= (inb(dev->iobase + FL512_AI_MSB_REG) << 8); + val &= s->maxdata; + + data[i] = val; + } + + return insn->n; +} + +static int fl512_ao_insn_write(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) +{ + unsigned int chan = CR_CHAN(insn->chanspec); + unsigned int val = s->readback[chan]; + int i; + + for (i = 0; i < insn->n; i++) { + val = data[i]; + + /* write LSB, MSB then trigger conversion */ + outb(val & 0x0ff, dev->iobase + FL512_AO_DATA_REG(chan)); + outb((val >> 8) & 0xf, dev->iobase + FL512_AO_DATA_REG(chan)); + inb(dev->iobase + FL512_AO_TRIG_REG(chan)); + } + s->readback[chan] = val; + + return insn->n; +} + +static int fl512_attach(struct comedi_device *dev, struct comedi_devconfig *it) +{ + struct comedi_subdevice *s; + int ret; + + ret = comedi_request_region(dev, it->options[0], 0x10); + if (ret) + return ret; + + ret = comedi_alloc_subdevices(dev, 2); + if (ret) + return ret; + + /* Analog Input subdevice */ + s = &dev->subdevices[0]; + s->type = COMEDI_SUBD_AI; + s->subdev_flags = SDF_READABLE | SDF_GROUND; + s->n_chan = 16; + s->maxdata = 0x0fff; + s->range_table = &range_fl512; + s->insn_read = fl512_ai_insn_read; + + /* Analog Output subdevice */ + s = &dev->subdevices[1]; + s->type = COMEDI_SUBD_AO; + s->subdev_flags = SDF_WRITABLE; + s->n_chan = 2; + s->maxdata = 0x0fff; + s->range_table = &range_fl512; + s->insn_write = fl512_ao_insn_write; + + return comedi_alloc_subdev_readback(s); +} + +static struct comedi_driver fl512_driver = { + .driver_name = "fl512", + .module = THIS_MODULE, + .attach = fl512_attach, + .detach = comedi_legacy_detach, +}; +module_comedi_driver(fl512_driver); + +MODULE_AUTHOR("Comedi https://www.comedi.org"); +MODULE_DESCRIPTION("Comedi low-level driver"); +MODULE_LICENSE("GPL"); |