1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * ke_counter.c
4 * Comedi driver for Kolter-Electronic PCI Counter 1 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: ke_counter
12 * Description: Driver for Kolter Electronic Counter Card
13 * Devices: [Kolter Electronic] PCI Counter Card (ke_counter)
14 * Author: Michael Hillmann
15 * Updated: Mon, 14 Apr 2008 15:42:42 +0100
16 * Status: tested
17 *
18 * Configuration Options: not applicable, uses PCI auto config
19 */
20
21#include <linux/module.h>
22#include <linux/comedi/comedi_pci.h>
23
24/*
25 * PCI BAR 0 Register I/O map
26 */
27#define KE_RESET_REG(x) (0x00 + ((x) * 0x20))
28#define KE_LATCH_REG(x) (0x00 + ((x) * 0x20))
29#define KE_LSB_REG(x) (0x04 + ((x) * 0x20))
30#define KE_MID_REG(x) (0x08 + ((x) * 0x20))
31#define KE_MSB_REG(x) (0x0c + ((x) * 0x20))
32#define KE_SIGN_REG(x) (0x10 + ((x) * 0x20))
33#define KE_OSC_SEL_REG 0xf8
34#define KE_OSC_SEL_CLK(x) (((x) & 0x3) << 0)
35#define KE_OSC_SEL_EXT KE_OSC_SEL_CLK(1)
36#define KE_OSC_SEL_4MHZ KE_OSC_SEL_CLK(2)
37#define KE_OSC_SEL_20MHZ KE_OSC_SEL_CLK(3)
38#define KE_DO_REG 0xfc
39
40static int ke_counter_insn_write(struct comedi_device *dev,
41 struct comedi_subdevice *s,
42 struct comedi_insn *insn,
43 unsigned int *data)
44{
45 unsigned int chan = CR_CHAN(insn->chanspec);
46 unsigned int val;
47 int i;
48
49 for (i = 0; i < insn->n; i++) {
50 val = data[0];
51
52 /* Order matters */
53 outb(value: (val >> 24) & 0xff, port: dev->iobase + KE_SIGN_REG(chan));
54 outb(value: (val >> 16) & 0xff, port: dev->iobase + KE_MSB_REG(chan));
55 outb(value: (val >> 8) & 0xff, port: dev->iobase + KE_MID_REG(chan));
56 outb(value: (val >> 0) & 0xff, port: dev->iobase + KE_LSB_REG(chan));
57 }
58
59 return insn->n;
60}
61
62static int ke_counter_insn_read(struct comedi_device *dev,
63 struct comedi_subdevice *s,
64 struct comedi_insn *insn,
65 unsigned int *data)
66{
67 unsigned int chan = CR_CHAN(insn->chanspec);
68 unsigned int val;
69 int i;
70
71 for (i = 0; i < insn->n; i++) {
72 /* Order matters */
73 inb(port: dev->iobase + KE_LATCH_REG(chan));
74
75 val = inb(port: dev->iobase + KE_LSB_REG(chan));
76 val |= (inb(port: dev->iobase + KE_MID_REG(chan)) << 8);
77 val |= (inb(port: dev->iobase + KE_MSB_REG(chan)) << 16);
78 val |= (inb(port: dev->iobase + KE_SIGN_REG(chan)) << 24);
79
80 data[i] = val;
81 }
82
83 return insn->n;
84}
85
86static void ke_counter_reset(struct comedi_device *dev)
87{
88 unsigned int chan;
89
90 for (chan = 0; chan < 3; chan++)
91 outb(value: 0, port: dev->iobase + KE_RESET_REG(chan));
92}
93
94static int ke_counter_insn_config(struct comedi_device *dev,
95 struct comedi_subdevice *s,
96 struct comedi_insn *insn,
97 unsigned int *data)
98{
99 unsigned char src;
100
101 switch (data[0]) {
102 case INSN_CONFIG_SET_CLOCK_SRC:
103 switch (data[1]) {
104 case KE_CLK_20MHZ: /* default */
105 src = KE_OSC_SEL_20MHZ;
106 break;
107 case KE_CLK_4MHZ: /* option */
108 src = KE_OSC_SEL_4MHZ;
109 break;
110 case KE_CLK_EXT: /* Pin 21 on D-sub */
111 src = KE_OSC_SEL_EXT;
112 break;
113 default:
114 return -EINVAL;
115 }
116 outb(value: src, port: dev->iobase + KE_OSC_SEL_REG);
117 break;
118 case INSN_CONFIG_GET_CLOCK_SRC:
119 src = inb(port: dev->iobase + KE_OSC_SEL_REG);
120 switch (src) {
121 case KE_OSC_SEL_20MHZ:
122 data[1] = KE_CLK_20MHZ;
123 data[2] = 50; /* 50ns */
124 break;
125 case KE_OSC_SEL_4MHZ:
126 data[1] = KE_CLK_4MHZ;
127 data[2] = 250; /* 250ns */
128 break;
129 case KE_OSC_SEL_EXT:
130 data[1] = KE_CLK_EXT;
131 data[2] = 0; /* Unknown */
132 break;
133 default:
134 return -EINVAL;
135 }
136 break;
137 case INSN_CONFIG_RESET:
138 ke_counter_reset(dev);
139 break;
140 default:
141 return -EINVAL;
142 }
143
144 return insn->n;
145}
146
147static int ke_counter_do_insn_bits(struct comedi_device *dev,
148 struct comedi_subdevice *s,
149 struct comedi_insn *insn,
150 unsigned int *data)
151{
152 if (comedi_dio_update_state(s, data))
153 outb(value: s->state, port: dev->iobase + KE_DO_REG);
154
155 data[1] = s->state;
156
157 return insn->n;
158}
159
160static int ke_counter_auto_attach(struct comedi_device *dev,
161 unsigned long context_unused)
162{
163 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
164 struct comedi_subdevice *s;
165 int ret;
166
167 ret = comedi_pci_enable(dev);
168 if (ret)
169 return ret;
170 dev->iobase = pci_resource_start(pcidev, 0);
171
172 ret = comedi_alloc_subdevices(dev, num_subdevices: 2);
173 if (ret)
174 return ret;
175
176 s = &dev->subdevices[0];
177 s->type = COMEDI_SUBD_COUNTER;
178 s->subdev_flags = SDF_READABLE;
179 s->n_chan = 3;
180 s->maxdata = 0x01ffffff;
181 s->range_table = &range_unknown;
182 s->insn_read = ke_counter_insn_read;
183 s->insn_write = ke_counter_insn_write;
184 s->insn_config = ke_counter_insn_config;
185
186 s = &dev->subdevices[1];
187 s->type = COMEDI_SUBD_DO;
188 s->subdev_flags = SDF_WRITABLE;
189 s->n_chan = 3;
190 s->maxdata = 1;
191 s->range_table = &range_digital;
192 s->insn_bits = ke_counter_do_insn_bits;
193
194 outb(KE_OSC_SEL_20MHZ, port: dev->iobase + KE_OSC_SEL_REG);
195
196 ke_counter_reset(dev);
197
198 return 0;
199}
200
201static struct comedi_driver ke_counter_driver = {
202 .driver_name = "ke_counter",
203 .module = THIS_MODULE,
204 .auto_attach = ke_counter_auto_attach,
205 .detach = comedi_pci_detach,
206};
207
208static int ke_counter_pci_probe(struct pci_dev *dev,
209 const struct pci_device_id *id)
210{
211 return comedi_pci_auto_config(pcidev: dev, driver: &ke_counter_driver,
212 context: id->driver_data);
213}
214
215static const struct pci_device_id ke_counter_pci_table[] = {
216 { PCI_DEVICE(PCI_VENDOR_ID_KOLTER, 0x0014) },
217 { 0 }
218};
219MODULE_DEVICE_TABLE(pci, ke_counter_pci_table);
220
221static struct pci_driver ke_counter_pci_driver = {
222 .name = "ke_counter",
223 .id_table = ke_counter_pci_table,
224 .probe = ke_counter_pci_probe,
225 .remove = comedi_pci_auto_unconfig,
226};
227module_comedi_pci_driver(ke_counter_driver, ke_counter_pci_driver);
228
229MODULE_AUTHOR("Comedi https://www.comedi.org");
230MODULE_DESCRIPTION("Comedi driver for Kolter Electronic Counter Card");
231MODULE_LICENSE("GPL");
232

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