| /* |
| |
| comedi/drivers/aio_aio12_8.c |
| |
| Driver for Acces I/O Products PC-104 AIO12-8 Analog I/O Board |
| Copyright (C) 2006 C&C Technologies, Inc. |
| |
| 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: aio_aio12_8 |
| Description: Acces I/O Products PC-104 AIO12-8 Analog I/O Board |
| Author: Pablo Mejia <pablo.mejia@cctechnol.com> |
| Devices: |
| [Acces I/O] PC-104 AIO12-8 |
| Status: experimental |
| |
| Configuration Options: |
| [0] - I/O port base address |
| |
| Notes: |
| |
| Only synchronous operations are supported. |
| |
| */ |
| |
| #include "../comedidev.h" |
| #include <linux/ioport.h> |
| #include "8255.h" |
| |
| #define AIO12_8_STATUS 0x00 |
| #define AIO12_8_INTERRUPT 0x01 |
| #define AIO12_8_ADC 0x02 |
| #define AIO12_8_DAC_0 0x04 |
| #define AIO12_8_DAC_1 0x06 |
| #define AIO12_8_DAC_2 0x08 |
| #define AIO12_8_DAC_3 0x0A |
| #define AIO12_8_COUNTER_0 0x0C |
| #define AIO12_8_COUNTER_1 0x0D |
| #define AIO12_8_COUNTER_2 0x0E |
| #define AIO12_8_COUNTER_CONTROL 0x0F |
| #define AIO12_8_DIO_0 0x10 |
| #define AIO12_8_DIO_1 0x11 |
| #define AIO12_8_DIO_2 0x12 |
| #define AIO12_8_DIO_STATUS 0x13 |
| #define AIO12_8_DIO_CONTROL 0x14 |
| #define AIO12_8_ADC_TRIGGER_CONTROL 0x15 |
| #define AIO12_8_TRIGGER 0x16 |
| #define AIO12_8_POWER 0x17 |
| |
| #define STATUS_ADC_EOC 0x80 |
| |
| #define ADC_MODE_NORMAL 0x00 |
| #define ADC_MODE_INTERNAL_CLOCK 0x40 |
| #define ADC_MODE_STANDBY 0x80 |
| #define ADC_MODE_POWERDOWN 0xC0 |
| |
| #define DAC_ENABLE 0x18 |
| |
| struct aio12_8_boardtype { |
| const char *name; |
| }; |
| |
| static const struct aio12_8_boardtype board_types[] = { |
| { |
| .name = "aio_aio12_8"}, |
| }; |
| |
| #define thisboard ((const struct aio12_8_boardtype *) dev->board_ptr) |
| |
| struct aio12_8_private { |
| unsigned int ao_readback[4]; |
| }; |
| |
| #define devpriv ((struct aio12_8_private *) dev->private) |
| |
| static int aio_aio12_8_ai_read(struct comedi_device *dev, |
| struct comedi_subdevice *s, |
| struct comedi_insn *insn, unsigned int *data) |
| { |
| int n; |
| unsigned char control = |
| ADC_MODE_NORMAL | |
| (CR_RANGE(insn->chanspec) << 3) | CR_CHAN(insn->chanspec); |
| |
| /* read status to clear EOC latch */ |
| inb(dev->iobase + AIO12_8_STATUS); |
| |
| for (n = 0; n < insn->n; n++) { |
| int timeout = 5; |
| |
| /* Setup and start conversion */ |
| outb(control, dev->iobase + AIO12_8_ADC); |
| |
| /* Wait for conversion to complete */ |
| while (timeout && |
| !(inb(dev->iobase + AIO12_8_STATUS) & STATUS_ADC_EOC)) { |
| timeout--; |
| printk("timeout %d\n", timeout); |
| udelay(1); |
| } |
| if (timeout == 0) { |
| comedi_error(dev, "ADC timeout"); |
| return -EIO; |
| } |
| |
| data[n] = inw(dev->iobase + AIO12_8_ADC) & 0x0FFF; |
| } |
| return n; |
| } |
| |
| static int aio_aio12_8_ao_read(struct comedi_device *dev, |
| struct comedi_subdevice *s, |
| struct comedi_insn *insn, unsigned int *data) |
| { |
| int i; |
| int val = devpriv->ao_readback[CR_CHAN(insn->chanspec)]; |
| |
| for (i = 0; i < insn->n; i++) |
| data[i] = val; |
| return insn->n; |
| } |
| |
| static int aio_aio12_8_ao_write(struct comedi_device *dev, |
| struct comedi_subdevice *s, |
| struct comedi_insn *insn, unsigned int *data) |
| { |
| int i; |
| int chan = CR_CHAN(insn->chanspec); |
| unsigned long port = dev->iobase + AIO12_8_DAC_0 + (2 * chan); |
| |
| /* enable DACs */ |
| outb(0x01, dev->iobase + DAC_ENABLE); |
| |
| for (i = 0; i < insn->n; i++) { |
| outb(data[i] & 0xFF, port); /* LSB */ |
| outb((data[i] >> 8) & 0x0F, port + 1); /* MSB */ |
| devpriv->ao_readback[chan] = data[i]; |
| } |
| return insn->n; |
| } |
| |
| static const struct comedi_lrange range_aio_aio12_8 = { |
| 4, |
| { |
| UNI_RANGE(5), |
| BIP_RANGE(5), |
| UNI_RANGE(10), |
| BIP_RANGE(10), |
| } |
| }; |
| |
| static int aio_aio12_8_attach(struct comedi_device *dev, |
| struct comedi_devconfig *it) |
| { |
| int iobase; |
| struct comedi_subdevice *s; |
| |
| iobase = it->options[0]; |
| if (!request_region(iobase, 24, "aio_aio12_8")) { |
| printk("I/O port conflict"); |
| return -EIO; |
| } |
| |
| dev->board_name = thisboard->name; |
| |
| dev->iobase = iobase; |
| |
| if (alloc_private(dev, sizeof(struct aio12_8_private)) < 0) |
| return -ENOMEM; |
| |
| if (alloc_subdevices(dev, 3) < 0) |
| return -ENOMEM; |
| |
| s = &dev->subdevices[0]; |
| s->type = COMEDI_SUBD_AI; |
| s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF; |
| s->n_chan = 8; |
| s->maxdata = (1 << 12) - 1; |
| s->range_table = &range_aio_aio12_8; |
| s->insn_read = aio_aio12_8_ai_read; |
| |
| s = &dev->subdevices[1]; |
| s->type = COMEDI_SUBD_AO; |
| s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_DIFF; |
| s->n_chan = 4; |
| s->maxdata = (1 << 12) - 1; |
| s->range_table = &range_aio_aio12_8; |
| s->insn_read = aio_aio12_8_ao_read; |
| s->insn_write = aio_aio12_8_ao_write; |
| |
| s = &dev->subdevices[2]; |
| subdev_8255_init(dev, s, NULL, dev->iobase + AIO12_8_DIO_0); |
| |
| return 0; |
| } |
| |
| static int aio_aio12_8_detach(struct comedi_device *dev) |
| { |
| subdev_8255_cleanup(dev, &dev->subdevices[2]); |
| if (dev->iobase) |
| release_region(dev->iobase, 24); |
| return 0; |
| } |
| |
| static struct comedi_driver driver_aio_aio12_8 = { |
| .driver_name = "aio_aio12_8", |
| .module = THIS_MODULE, |
| .attach = aio_aio12_8_attach, |
| .detach = aio_aio12_8_detach, |
| .board_name = &board_types[0].name, |
| .num_names = 1, |
| .offset = sizeof(struct aio12_8_boardtype), |
| }; |
| |
| COMEDI_INITCLEANUP(driver_aio_aio12_8); |