1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * adv_pci1723.c
4 * Comedi driver for the Advantech PCI-1723 card.
5 *
6 * COMEDI - Linux Control and Measurement Device Interface
7 * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
8 */
9
10/*
11 * Driver: adv_pci1723
12 * Description: Advantech PCI-1723
13 * Author: yonggang <rsmgnu@gmail.com>, Ian Abbott <abbotti@mev.co.uk>
14 * Devices: [Advantech] PCI-1723 (adv_pci1723)
15 * Updated: Mon, 14 Apr 2008 15:12:56 +0100
16 * Status: works
17 *
18 * Configuration Options: not applicable, uses comedi PCI auto config
19 *
20 * Subdevice 0 is 8-channel AO, 16-bit, range +/- 10 V.
21 *
22 * Subdevice 1 is 16-channel DIO. The channels are configurable as
23 * input or output in 2 groups (0 to 7, 8 to 15). Configuring any
24 * channel implicitly configures all channels in the same group.
25 *
26 * TODO:
27 * 1. Add the two milliamp ranges to the AO subdevice (0 to 20 mA,
28 * 4 to 20 mA).
29 * 2. Read the initial ranges and values of the AO subdevice at
30 * start-up instead of reinitializing them.
31 * 3. Implement calibration.
32 */
33
34#include <linux/module.h>
35#include <linux/comedi/comedi_pci.h>
36
37/*
38 * PCI Bar 2 I/O Register map (dev->iobase)
39 */
40#define PCI1723_AO_REG(x) (0x00 + ((x) * 2))
41#define PCI1723_BOARD_ID_REG 0x10
42#define PCI1723_BOARD_ID_MASK (0xf << 0)
43#define PCI1723_SYNC_CTRL_REG 0x12
44#define PCI1723_SYNC_CTRL(x) (((x) & 0x1) << 0)
45#define PCI1723_SYNC_CTRL_ASYNC PCI1723_SYNC_CTRL(0)
46#define PCI1723_SYNC_CTRL_SYNC PCI1723_SYNC_CTRL(1)
47#define PCI1723_CTRL_REG 0x14
48#define PCI1723_CTRL_BUSY BIT(15)
49#define PCI1723_CTRL_INIT BIT(14)
50#define PCI1723_CTRL_SELF BIT(8)
51#define PCI1723_CTRL_IDX(x) (((x) & 0x3) << 6)
52#define PCI1723_CTRL_RANGE(x) (((x) & 0x3) << 4)
53#define PCI1723_CTRL_SEL(x) (((x) & 0x1) << 3)
54#define PCI1723_CTRL_GAIN PCI1723_CTRL_SEL(0)
55#define PCI1723_CTRL_OFFSET PCI1723_CTRL_SEL(1)
56#define PCI1723_CTRL_CHAN(x) (((x) & 0x7) << 0)
57#define PCI1723_CALIB_CTRL_REG 0x16
58#define PCI1723_CALIB_CTRL_CS BIT(2)
59#define PCI1723_CALIB_CTRL_DAT BIT(1)
60#define PCI1723_CALIB_CTRL_CLK BIT(0)
61#define PCI1723_CALIB_STROBE_REG 0x18
62#define PCI1723_DIO_CTRL_REG 0x1a
63#define PCI1723_DIO_CTRL_HDIO BIT(1)
64#define PCI1723_DIO_CTRL_LDIO BIT(0)
65#define PCI1723_DIO_DATA_REG 0x1c
66#define PCI1723_CALIB_DATA_REG 0x1e
67#define PCI1723_SYNC_STROBE_REG 0x20
68#define PCI1723_RESET_AO_STROBE_REG 0x22
69#define PCI1723_RESET_CALIB_STROBE_REG 0x24
70#define PCI1723_RANGE_STROBE_REG 0x26
71#define PCI1723_VREF_REG 0x28
72#define PCI1723_VREF(x) (((x) & 0x3) << 0)
73#define PCI1723_VREF_NEG10V PCI1723_VREF(0)
74#define PCI1723_VREF_0V PCI1723_VREF(1)
75#define PCI1723_VREF_POS10V PCI1723_VREF(3)
76
77static int pci1723_ao_insn_write(struct comedi_device *dev,
78 struct comedi_subdevice *s,
79 struct comedi_insn *insn,
80 unsigned int *data)
81{
82 unsigned int chan = CR_CHAN(insn->chanspec);
83 int i;
84
85 for (i = 0; i < insn->n; i++) {
86 unsigned int val = data[i];
87
88 outw(value: val, port: dev->iobase + PCI1723_AO_REG(chan));
89 s->readback[chan] = val;
90 }
91
92 return insn->n;
93}
94
95static int pci1723_dio_insn_config(struct comedi_device *dev,
96 struct comedi_subdevice *s,
97 struct comedi_insn *insn,
98 unsigned int *data)
99{
100 unsigned int chan = CR_CHAN(insn->chanspec);
101 unsigned int mask = (chan < 8) ? 0x00ff : 0xff00;
102 unsigned short mode = 0x0000; /* assume output */
103 int ret;
104
105 ret = comedi_dio_insn_config(dev, s, insn, data, mask);
106 if (ret)
107 return ret;
108
109 if (!(s->io_bits & 0x00ff))
110 mode |= PCI1723_DIO_CTRL_LDIO; /* low byte input */
111 if (!(s->io_bits & 0xff00))
112 mode |= PCI1723_DIO_CTRL_HDIO; /* high byte input */
113 outw(value: mode, port: dev->iobase + PCI1723_DIO_CTRL_REG);
114
115 return insn->n;
116}
117
118static int pci1723_dio_insn_bits(struct comedi_device *dev,
119 struct comedi_subdevice *s,
120 struct comedi_insn *insn,
121 unsigned int *data)
122{
123 if (comedi_dio_update_state(s, data))
124 outw(value: s->state, port: dev->iobase + PCI1723_DIO_DATA_REG);
125
126 data[1] = inw(port: dev->iobase + PCI1723_DIO_DATA_REG);
127
128 return insn->n;
129}
130
131static int pci1723_auto_attach(struct comedi_device *dev,
132 unsigned long context_unused)
133{
134 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
135 struct comedi_subdevice *s;
136 unsigned int val;
137 int ret;
138 int i;
139
140 ret = comedi_pci_enable(dev);
141 if (ret)
142 return ret;
143 dev->iobase = pci_resource_start(pcidev, 2);
144
145 ret = comedi_alloc_subdevices(dev, num_subdevices: 2);
146 if (ret)
147 return ret;
148
149 s = &dev->subdevices[0];
150 s->type = COMEDI_SUBD_AO;
151 s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_COMMON;
152 s->n_chan = 8;
153 s->maxdata = 0xffff;
154 s->range_table = &range_bipolar10;
155 s->insn_write = pci1723_ao_insn_write;
156
157 ret = comedi_alloc_subdev_readback(s);
158 if (ret)
159 return ret;
160
161 /* synchronously reset all analog outputs to 0V, +/-10V range */
162 outw(PCI1723_SYNC_CTRL_SYNC, port: dev->iobase + PCI1723_SYNC_CTRL_REG);
163 for (i = 0; i < s->n_chan; i++) {
164 outw(PCI1723_CTRL_RANGE(0) | PCI1723_CTRL_CHAN(i),
165 PCI1723_CTRL_REG);
166 outw(value: 0, port: dev->iobase + PCI1723_RANGE_STROBE_REG);
167
168 outw(value: 0x8000, port: dev->iobase + PCI1723_AO_REG(i));
169 s->readback[i] = 0x8000;
170 }
171 outw(value: 0, port: dev->iobase + PCI1723_SYNC_STROBE_REG);
172
173 /* disable syncronous control */
174 outw(PCI1723_SYNC_CTRL_ASYNC, port: dev->iobase + PCI1723_SYNC_CTRL_REG);
175
176 s = &dev->subdevices[1];
177 s->type = COMEDI_SUBD_DIO;
178 s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
179 s->n_chan = 16;
180 s->maxdata = 1;
181 s->range_table = &range_digital;
182 s->insn_config = pci1723_dio_insn_config;
183 s->insn_bits = pci1723_dio_insn_bits;
184
185 /* get initial DIO direction and state */
186 val = inw(port: dev->iobase + PCI1723_DIO_CTRL_REG);
187 if (!(val & PCI1723_DIO_CTRL_LDIO))
188 s->io_bits |= 0x00ff; /* low byte output */
189 if (!(val & PCI1723_DIO_CTRL_HDIO))
190 s->io_bits |= 0xff00; /* high byte output */
191 s->state = inw(port: dev->iobase + PCI1723_DIO_DATA_REG);
192
193 return 0;
194}
195
196static struct comedi_driver adv_pci1723_driver = {
197 .driver_name = "adv_pci1723",
198 .module = THIS_MODULE,
199 .auto_attach = pci1723_auto_attach,
200 .detach = comedi_pci_detach,
201};
202
203static int adv_pci1723_pci_probe(struct pci_dev *dev,
204 const struct pci_device_id *id)
205{
206 return comedi_pci_auto_config(pcidev: dev, driver: &adv_pci1723_driver,
207 context: id->driver_data);
208}
209
210static const struct pci_device_id adv_pci1723_pci_table[] = {
211 { PCI_DEVICE(PCI_VENDOR_ID_ADVANTECH, 0x1723) },
212 { 0 }
213};
214MODULE_DEVICE_TABLE(pci, adv_pci1723_pci_table);
215
216static struct pci_driver adv_pci1723_pci_driver = {
217 .name = "adv_pci1723",
218 .id_table = adv_pci1723_pci_table,
219 .probe = adv_pci1723_pci_probe,
220 .remove = comedi_pci_auto_unconfig,
221};
222module_comedi_pci_driver(adv_pci1723_driver, adv_pci1723_pci_driver);
223
224MODULE_AUTHOR("Comedi https://www.comedi.org");
225MODULE_DESCRIPTION("Advantech PCI-1723 Comedi driver");
226MODULE_LICENSE("GPL");
227

source code of linux/drivers/comedi/drivers/adv_pci1723.c