/*
-
- comedi/drivers/aio_aio12_8.c
-
- Driver for Access 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.
-*/
+ * aio_aio12_8.c
+ * Driver for Access 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.
+ */
/*
-
-Driver: aio_aio12_8
-Description: Access I/O Products PC-104 AIO12-8 Analog I/O Board
-Author: Pablo Mejia <pablo.mejia@cctechnol.com>
-Devices: [Access I/O] PC-104 AIO12-8 (aio_aio12_8)
- [Access I/O] PC-104 AI12-8 (aio_ai12_8)
- [Access I/O] PC-104 AO12-8 (aio_ao12_8)
-Status: experimental
-
-Configuration Options:
- [0] - I/O port base address
-
-Notes:
-
- Only synchronous operations are supported.
-
-*/
+ * Driver: aio_aio12_8
+ * Description: Access I/O Products PC-104 AIO12-8 Analog I/O Board
+ * Author: Pablo Mejia <pablo.mejia@cctechnol.com>
+ * Devices: [Access I/O] PC-104 AIO12-8 (aio_aio12_8),
+ * [Access I/O] PC-104 AI12-8 (aio_ai12_8),
+ * [Access I/O] PC-104 AO12-4 (aio_ao12_4)
+ * Status: experimental
+ *
+ * Configuration Options:
+ * [0] - I/O port base address
+ *
+ * Notes:
+ * Only synchronous operations are supported.
+ */
#include <linux/module.h>
#include "../comedidev.h"
+
+#include "comedi_8254.h"
#include "8255.h"
/*
* Register map
*/
#define AIO12_8_STATUS_REG 0x00
-#define AIO12_8_STATUS_ADC_EOC (1 << 7)
-#define AIO12_8_STATUS_PORT_C_COS (1 << 6)
-#define AIO12_8_STATUS_IRQ_ENA (1 << 2)
+#define AIO12_8_STATUS_ADC_EOC BIT(7)
+#define AIO12_8_STATUS_PORT_C_COS BIT(6)
+#define AIO12_8_STATUS_IRQ_ENA BIT(2)
#define AIO12_8_INTERRUPT_REG 0x01
-#define AIO12_8_INTERRUPT_ADC (1 << 7)
-#define AIO12_8_INTERRUPT_COS (1 << 6)
-#define AIO12_8_INTERRUPT_COUNTER1 (1 << 5)
-#define AIO12_8_INTERRUPT_PORT_C3 (1 << 4)
-#define AIO12_8_INTERRUPT_PORT_C0 (1 << 3)
-#define AIO12_8_INTERRUPT_ENA (1 << 2)
+#define AIO12_8_INTERRUPT_ADC BIT(7)
+#define AIO12_8_INTERRUPT_COS BIT(6)
+#define AIO12_8_INTERRUPT_COUNTER1 BIT(5)
+#define AIO12_8_INTERRUPT_PORT_C3 BIT(4)
+#define AIO12_8_INTERRUPT_PORT_C0 BIT(3)
+#define AIO12_8_INTERRUPT_ENA BIT(2)
#define AIO12_8_ADC_REG 0x02
-#define AIO12_8_ADC_MODE_NORMAL (0 << 6)
-#define AIO12_8_ADC_MODE_INT_CLK (1 << 6)
-#define AIO12_8_ADC_MODE_STANDBY (2 << 6)
-#define AIO12_8_ADC_MODE_POWERDOWN (3 << 6)
-#define AIO12_8_ADC_ACQ_3USEC (0 << 5)
-#define AIO12_8_ADC_ACQ_PROGRAM (1 << 5)
+#define AIO12_8_ADC_MODE(x) (((x) & 0x3) << 6)
+#define AIO12_8_ADC_MODE_NORMAL AIO12_8_ADC_MODE(0)
+#define AIO12_8_ADC_MODE_INT_CLK AIO12_8_ADC_MODE(1)
+#define AIO12_8_ADC_MODE_STANDBY AIO12_8_ADC_MODE(2)
+#define AIO12_8_ADC_MODE_POWERDOWN AIO12_8_ADC_MODE(3)
+#define AIO12_8_ADC_ACQ(x) (((x) & 0x1) << 5)
+#define AIO12_8_ADC_ACQ_3USEC AIO12_8_ADC_ACQ(0)
+#define AIO12_8_ADC_ACQ_PROGRAM AIO12_8_ADC_ACQ(1)
#define AIO12_8_ADC_RANGE(x) ((x) << 3)
#define AIO12_8_ADC_CHAN(x) ((x) << 0)
#define AIO12_8_DAC_REG(x) (0x04 + (x) * 2)
#define AIO12_8_8254_BASE_REG 0x0c
#define AIO12_8_8255_BASE_REG 0x10
#define AIO12_8_DIO_CONTROL_REG 0x14
-#define AIO12_8_DIO_CONTROL_TST (1 << 0)
+#define AIO12_8_DIO_CONTROL_TST BIT(0)
#define AIO12_8_ADC_TRIGGER_REG 0x15
#define AIO12_8_ADC_TRIGGER_RANGE(x) ((x) << 3)
#define AIO12_8_ADC_TRIGGER_CHAN(x) ((x) << 0)
#define AIO12_8_TRIGGER_REG 0x16
-#define AIO12_8_TRIGGER_ADTRIG (1 << 1)
-#define AIO12_8_TRIGGER_DACTRIG (1 << 0)
+#define AIO12_8_TRIGGER_ADTRIG BIT(1)
+#define AIO12_8_TRIGGER_DACTRIG BIT(0)
#define AIO12_8_COS_REG 0x17
#define AIO12_8_DAC_ENABLE_REG 0x18
-#define AIO12_8_DAC_ENABLE_REF_ENA (1 << 0)
+#define AIO12_8_DAC_ENABLE_REF_ENA BIT(0)
+
+static const struct comedi_lrange aio_aio12_8_range = {
+ 4, {
+ UNI_RANGE(5),
+ BIP_RANGE(5),
+ UNI_RANGE(10),
+ BIP_RANGE(10)
+ }
+};
struct aio12_8_boardtype {
const char *name;
- int ai_nchan;
- int ao_nchan;
+ unsigned int has_ai:1;
+ unsigned int has_ao:1;
};
static const struct aio12_8_boardtype board_types[] = {
{
.name = "aio_aio12_8",
- .ai_nchan = 8,
- .ao_nchan = 4,
+ .has_ai = 1,
+ .has_ao = 1,
}, {
.name = "aio_ai12_8",
- .ai_nchan = 8,
+ .has_ai = 1,
}, {
- .name = "aio_ao12_8",
- .ao_nchan = 4,
+ .name = "aio_ao12_4",
+ .has_ao = 1,
},
};
static int aio_aio12_8_ai_read(struct comedi_device *dev,
struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data)
+ struct comedi_insn *insn,
+ unsigned int *data)
{
unsigned int chan = CR_CHAN(insn->chanspec);
unsigned int range = CR_RANGE(insn->chanspec);
+ unsigned int val;
unsigned char control;
int ret;
- int n;
+ int i;
/*
* Setup the control byte for internal 2MHz clock, 3uS conversion,
/* Read status to clear EOC latch */
inb(dev->iobase + AIO12_8_STATUS_REG);
- for (n = 0; n < insn->n; n++) {
+ for (i = 0; i < insn->n; i++) {
/* Setup and start conversion */
outb(control, dev->iobase + AIO12_8_ADC_REG);
if (ret)
return ret;
- data[n] = inw(dev->iobase + AIO12_8_ADC_REG) & s->maxdata;
+ val = inw(dev->iobase + AIO12_8_ADC_REG) & s->maxdata;
+
+ /* munge bipolar 2's complement data to offset binary */
+ if (comedi_range_is_bipolar(s, range))
+ val = comedi_offset_munge(s, val);
+
+ data[i] = val;
}
return insn->n;
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_counter_insn_config(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ unsigned int chan = CR_CHAN(insn->chanspec);
+
+ switch (data[0]) {
+ case INSN_CONFIG_GET_CLOCK_SRC:
+ /*
+ * Channels 0 and 2 have external clock sources.
+ * Channel 1 has a fixed 1 MHz clock source.
+ */
+ data[0] = 0;
+ data[1] = (chan == 1) ? I8254_OSC_BASE_1MHZ : 0;
+ break;
+ default:
+ return -EINVAL;
}
-};
+
+ return insn->n;
+}
static int aio_aio12_8_attach(struct comedi_device *dev,
struct comedi_devconfig *it)
if (ret)
return ret;
+ dev->pacer = comedi_8254_init(dev->iobase + AIO12_8_8254_BASE_REG,
+ 0, I8254_IO8, 0);
+ if (!dev->pacer)
+ return -ENOMEM;
+
ret = comedi_alloc_subdevices(dev, 4);
if (ret)
return ret;
+ /* Analog Input subdevice */
s = &dev->subdevices[0];
- if (board->ai_nchan) {
- /* Analog input subdevice */
+ if (board->has_ai) {
s->type = COMEDI_SUBD_AI;
s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF;
- s->n_chan = board->ai_nchan;
+ s->n_chan = 8;
s->maxdata = 0x0fff;
- s->range_table = &range_aio_aio12_8;
+ s->range_table = &aio_aio12_8_range;
s->insn_read = aio_aio12_8_ai_read;
} else {
s->type = COMEDI_SUBD_UNUSED;
}
+ /* Analog Output subdevice */
s = &dev->subdevices[1];
- if (board->ao_nchan) {
- /* Analog output subdevice */
+ if (board->has_ao) {
s->type = COMEDI_SUBD_AO;
- s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_DIFF;
+ s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
s->n_chan = 4;
s->maxdata = 0x0fff;
- s->range_table = &range_aio_aio12_8;
+ s->range_table = &aio_aio12_8_range;
s->insn_write = aio_aio12_8_ao_insn_write;
ret = comedi_alloc_subdev_readback(s);
s->type = COMEDI_SUBD_UNUSED;
}
+ /* Digital I/O subdevice (8255) */
s = &dev->subdevices[2];
- /* 8255 Digital i/o subdevice */
ret = subdev_8255_init(dev, s, NULL, AIO12_8_8255_BASE_REG);
if (ret)
return ret;
+ /* Counter subdevice (8254) */
s = &dev->subdevices[3];
- /* 8254 counter/timer subdevice */
- s->type = COMEDI_SUBD_UNUSED;
+ comedi_8254_subdevice_init(s, dev->pacer);
+
+ dev->pacer->insn_config = aio_aio12_8_counter_insn_config;
return 0;
}
module_comedi_driver(aio_aio12_8_driver);
MODULE_AUTHOR("Comedi http://www.comedi.org");
-MODULE_DESCRIPTION("Comedi low-level driver");
+MODULE_DESCRIPTION("Comedi driver for Access I/O AIO12-8 Analog I/O Board");
MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff