diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/fl512.c')
-rw-r--r-- | drivers/staging/comedi/drivers/fl512.c | 207 |
1 files changed, 105 insertions, 102 deletions
diff --git a/drivers/staging/comedi/drivers/fl512.c b/drivers/staging/comedi/drivers/fl512.c index a99ddf00ddc4..4e410f3b0e24 100644 --- a/drivers/staging/comedi/drivers/fl512.c +++ b/drivers/staging/comedi/drivers/fl512.c @@ -1,27 +1,49 @@ /* - comedi/drivers/fl512.c - Anders Gnistrup <ex18@kalman.iau.dtu.dk> -*/ + * 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> + * + * 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: 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 -*/ + * 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> -#define FL512_SIZE 16 /* the size of the used memory */ +/* + * 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)) + struct fl512_private { unsigned short ao_readback[2]; }; @@ -38,72 +60,69 @@ static const struct comedi_lrange range_fl512 = { } }; -/* - * fl512_ai_insn : this is the analog input function - */ -static int fl512_ai_insn(struct comedi_device *dev, - struct comedi_subdevice *s, struct comedi_insn *insn, - unsigned int *data) +static int fl512_ai_insn_read(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) { - int n; - unsigned int lo_byte, hi_byte; - char chan = CR_CHAN(insn->chanspec); - unsigned long iobase = dev->iobase; - - for (n = 0; n < insn->n; n++) { /* sample n times on selected channel */ - /* XXX probably can move next step out of for() loop -- will - * make AI a little bit faster. */ - outb(chan, iobase + 2); /* select chan */ - outb(0, iobase + 3); /* start conversion */ + 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 */ - udelay(30); /* sleep 30 usec */ - lo_byte = inb(iobase + 2); /* low 8 byte */ - hi_byte = inb(iobase + 3) & 0xf; /* high 4 bit and mask */ - data[n] = lo_byte + (hi_byte << 8); + udelay(30); + + val = inb(dev->iobase + FL512_AI_LSB_REG); + val |= (inb(dev->iobase + FL512_AI_MSB_REG) << 8); + val &= s->maxdata; + + data[i] = val; } - return n; + + return insn->n; } -/* - * fl512_ao_insn : used to write to a DA port n times - */ -static int fl512_ao_insn(struct comedi_device *dev, - struct comedi_subdevice *s, struct comedi_insn *insn, - unsigned int *data) +static int fl512_ao_insn_write(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) { struct fl512_private *devpriv = dev->private; - int n; - int chan = CR_CHAN(insn->chanspec); /* get chan to write */ - unsigned long iobase = dev->iobase; /* get base address */ - - for (n = 0; n < insn->n; n++) { /* write n data set */ - /* write low byte */ - outb(data[n] & 0x0ff, iobase + 4 + 2 * chan); - /* write high byte */ - outb((data[n] & 0xf00) >> 8, iobase + 4 + 2 * chan); - inb(iobase + 4 + 2 * chan); /* trig */ - - devpriv->ao_readback[chan] = data[n]; + unsigned int chan = CR_CHAN(insn->chanspec); + unsigned int val = devpriv->ao_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)); } - return n; + devpriv->ao_readback[chan] = val; + + return insn->n; } -/* - * fl512_ao_insn_readback : used to read previous values written to - * DA port - */ -static int fl512_ao_insn_readback(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, unsigned int *data) +static int fl512_ao_insn_read(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_insn *insn, + unsigned int *data) { struct fl512_private *devpriv = dev->private; - int n; - int chan = CR_CHAN(insn->chanspec); + unsigned int chan = CR_CHAN(insn->chanspec); + int i; - for (n = 0; n < insn->n; n++) - data[n] = devpriv->ao_readback[chan]; + for (i = 0; i < insn->n; i++) + data[i] = devpriv->ao_readback[chan]; - return n; + return insn->n; } static int fl512_attach(struct comedi_device *dev, struct comedi_devconfig *it) @@ -112,7 +131,7 @@ 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], FL512_SIZE); + ret = comedi_request_region(dev, it->options[0], 0x10); if (ret) return ret; @@ -124,42 +143,26 @@ static int fl512_attach(struct comedi_device *dev, struct comedi_devconfig *it) if (ret) return ret; - /* - * this if the definitions of the supdevices, 2 have been defined - */ - /* Analog indput */ + /* Analog Input subdevice */ s = &dev->subdevices[0]; - /* define subdevice as Analog In */ - s->type = COMEDI_SUBD_AI; - /* you can read it from userspace */ - s->subdev_flags = SDF_READABLE | SDF_GROUND; - /* Number of Analog input channels */ - s->n_chan = 16; - /* accept only 12 bits of data */ - s->maxdata = 0x0fff; - /* device use one of the ranges */ - s->range_table = &range_fl512; - /* function to call when read AD */ - s->insn_read = fl512_ai_insn; - - /* Analog output */ + 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]; - /* define subdevice as Analog OUT */ - s->type = COMEDI_SUBD_AO; - /* you can write it from userspace */ - s->subdev_flags = SDF_WRITABLE; - /* Number of Analog output channels */ - s->n_chan = 2; - /* accept only 12 bits of data */ - s->maxdata = 0x0fff; - /* device use one of the ranges */ - s->range_table = &range_fl512; - /* function to call when write DA */ - s->insn_write = fl512_ao_insn; - /* function to call when reading DA */ - s->insn_read = fl512_ao_insn_readback; - - return 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; + s->insn_read = fl512_ao_insn_read; + + return 0; } static struct comedi_driver fl512_driver = { |