Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 | /*
* adv_pci1724.c
* Comedi driver for the Advantech PCI-1724U card.
*
* Author: Frank Mori Hess <fmh6jj@gmail.com>
* Copyright (C) 2013 GnuBIO Inc
*
* COMEDI - Linux Control and Measurement Device Interface
* Copyright (C) 1997-8 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: adv_pci1724
* Description: Advantech PCI-1724U
* Devices: [Advantech] PCI-1724U (adv_pci1724)
* Author: Frank Mori Hess <fmh6jj@gmail.com>
* Updated: 2013-02-09
* Status: works
*
* Configuration Options: not applicable, uses comedi PCI auto config
*
* Subdevice 0 is the analog output.
* Subdevice 1 is the offset calibration for the analog output.
* Subdevice 2 is the gain calibration for the analog output.
*
* The calibration offset and gains have quite a large effect on the
* analog output, so it is possible to adjust the analog output to
* have an output range significantly different from the board's
* nominal output ranges. For a calibrated +/-10V range, the analog
* output's offset will be set somewhere near mid-range (0x2000) and
* its gain will be near maximum (0x3fff).
*
* There is really no difference between the board's documented 0-20mA
* versus 4-20mA output ranges. To pick one or the other is simply a
* matter of adjusting the offset and gain calibration until the board
* outputs in the desired range.
*/
#include <linux/module.h>
#include "../comedi_pci.h"
/*
* PCI bar 2 Register I/O map (dev->iobase)
*/
#define PCI1724_DAC_CTRL_REG 0x00
#define PCI1724_DAC_CTRL_GX(x) BIT(20 + ((x) / 8))
#define PCI1724_DAC_CTRL_CX(x) (((x) % 8) << 16)
#define PCI1724_DAC_CTRL_MODE(x) (((x) & 0x3) << 14)
#define PCI1724_DAC_CTRL_MODE_GAIN PCI1724_DAC_CTRL_MODE(1)
#define PCI1724_DAC_CTRL_MODE_OFFSET PCI1724_DAC_CTRL_MODE(2)
#define PCI1724_DAC_CTRL_MODE_NORMAL PCI1724_DAC_CTRL_MODE(3)
#define PCI1724_DAC_CTRL_MODE_MASK PCI1724_DAC_CTRL_MODE(3)
#define PCI1724_DAC_CTRL_DATA(x) (((x) & 0x3fff) << 0)
#define PCI1724_SYNC_CTRL_REG 0x04
#define PCI1724_SYNC_CTRL_DACSTAT BIT(1)
#define PCI1724_SYNC_CTRL_SYN BIT(0)
#define PCI1724_EEPROM_CTRL_REG 0x08
#define PCI1724_SYNC_TRIG_REG 0x0c /* any value works */
#define PCI1724_BOARD_ID_REG 0x10
#define PCI1724_BOARD_ID_MASK (0xf << 0)
static const struct comedi_lrange adv_pci1724_ao_ranges = {
4, {
BIP_RANGE(10),
RANGE_mA(0, 20),
RANGE_mA(4, 20),
RANGE_unitless(0, 1)
}
};
static int adv_pci1724_dac_idle(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned long context)
{
unsigned int status;
status = inl(dev->iobase + PCI1724_SYNC_CTRL_REG);
if ((status & PCI1724_SYNC_CTRL_DACSTAT) == 0)
return 0;
return -EBUSY;
}
static int adv_pci1724_insn_write(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
unsigned long mode = (unsigned long)s->private;
unsigned int chan = CR_CHAN(insn->chanspec);
unsigned int ctrl;
int ret;
int i;
ctrl = PCI1724_DAC_CTRL_GX(chan) | PCI1724_DAC_CTRL_CX(chan) | mode;
/* turn off synchronous mode */
outl(0, dev->iobase + PCI1724_SYNC_CTRL_REG);
for (i = 0; i < insn->n; ++i) {
unsigned int val = data[i];
ret = comedi_timeout(dev, s, insn, adv_pci1724_dac_idle, 0);
if (ret)
return ret;
outl(ctrl | PCI1724_DAC_CTRL_DATA(val),
dev->iobase + PCI1724_DAC_CTRL_REG);
s->readback[chan] = val;
}
return insn->n;
}
static int adv_pci1724_auto_attach(struct comedi_device *dev,
unsigned long context_unused)
{
struct pci_dev *pcidev = comedi_to_pci_dev(dev);
struct comedi_subdevice *s;
unsigned int board_id;
int ret;
ret = comedi_pci_enable(dev);
if (ret)
return ret;
dev->iobase = pci_resource_start(pcidev, 2);
board_id = inl(dev->iobase + PCI1724_BOARD_ID_REG);
dev_info(dev->class_dev, "board id: %d\n",
board_id & PCI1724_BOARD_ID_MASK);
ret = comedi_alloc_subdevices(dev, 3);
if (ret)
return ret;
/* Analog Output subdevice */
s = &dev->subdevices[0];
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_GROUND;
s->n_chan = 32;
s->maxdata = 0x3fff;
s->range_table = &adv_pci1724_ao_ranges;
s->insn_write = adv_pci1724_insn_write;
s->private = (void *)PCI1724_DAC_CTRL_MODE_NORMAL;
ret = comedi_alloc_subdev_readback(s);
if (ret)
return ret;
/* Offset Calibration subdevice */
s = &dev->subdevices[1];
s->type = COMEDI_SUBD_CALIB;
s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_INTERNAL;
s->n_chan = 32;
s->maxdata = 0x3fff;
s->insn_write = adv_pci1724_insn_write;
s->private = (void *)PCI1724_DAC_CTRL_MODE_OFFSET;
ret = comedi_alloc_subdev_readback(s);
if (ret)
return ret;
/* Gain Calibration subdevice */
s = &dev->subdevices[2];
s->type = COMEDI_SUBD_CALIB;
s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_INTERNAL;
s->n_chan = 32;
s->maxdata = 0x3fff;
s->insn_write = adv_pci1724_insn_write;
s->private = (void *)PCI1724_DAC_CTRL_MODE_GAIN;
return comedi_alloc_subdev_readback(s);
}
static struct comedi_driver adv_pci1724_driver = {
.driver_name = "adv_pci1724",
.module = THIS_MODULE,
.auto_attach = adv_pci1724_auto_attach,
.detach = comedi_pci_detach,
};
static int adv_pci1724_pci_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
return comedi_pci_auto_config(dev, &adv_pci1724_driver,
id->driver_data);
}
static const struct pci_device_id adv_pci1724_pci_table[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_ADVANTECH, 0x1724) },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, adv_pci1724_pci_table);
static struct pci_driver adv_pci1724_pci_driver = {
.name = "adv_pci1724",
.id_table = adv_pci1724_pci_table,
.probe = adv_pci1724_pci_probe,
.remove = comedi_pci_auto_unconfig,
};
module_comedi_pci_driver(adv_pci1724_driver, adv_pci1724_pci_driver);
MODULE_AUTHOR("Frank Mori Hess <fmh6jj@gmail.com>");
MODULE_DESCRIPTION("Advantech PCI-1724U Comedi driver");
MODULE_LICENSE("GPL");
|