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
|
/*
* comedi/drivers/amplc_pci236.c
* Driver for Amplicon PCI236 DIO boards.
*
* Copyright (C) 2002-2014 MEV Ltd. <http://www.mev.co.uk/>
*
* COMEDI - Linux Control and Measurement Device Interface
* Copyright (C) 2000 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: amplc_pci236
* Description: Amplicon PCI236
* Author: Ian Abbott <abbotti@mev.co.uk>
* Devices: [Amplicon] PCI236 (amplc_pci236)
* Updated: Fri, 25 Jul 2014 15:32:40 +0000
* Status: works
*
* Configuration options:
* none
*
* Manual configuration of PCI board (PCI236) is not supported; it is
* configured automatically.
*
* The PCI236 board has a single 8255 appearing as subdevice 0.
*
* Subdevice 1 pretends to be a digital input device, but it always
* returns 0 when read. However, if you run a command with
* scan_begin_src=TRIG_EXT, a rising edge on port C bit 3 acts as an
* external trigger, which can be used to wake up tasks. This is like
* the comedi_parport device. If no interrupt is connected, then
* subdevice 1 is unused.
*/
#include <linux/module.h>
#include <linux/interrupt.h>
#include "../comedi_pci.h"
#include "amplc_pc236.h"
#include "plx9052.h"
/* Disable, and clear, interrupts */
#define PCI236_INTR_DISABLE (PLX9052_INTCSR_LI1POL | \
PLX9052_INTCSR_LI2POL | \
PLX9052_INTCSR_LI1SEL | \
PLX9052_INTCSR_LI1CLRINT)
/* Enable, and clear, interrupts */
#define PCI236_INTR_ENABLE (PLX9052_INTCSR_LI1ENAB | \
PLX9052_INTCSR_LI1POL | \
PLX9052_INTCSR_LI2POL | \
PLX9052_INTCSR_PCIENAB | \
PLX9052_INTCSR_LI1SEL | \
PLX9052_INTCSR_LI1CLRINT)
static void pci236_intr_update_cb(struct comedi_device *dev, bool enable)
{
struct pc236_private *devpriv = dev->private;
/* this will also clear the "local interrupt 1" latch */
outl(enable ? PCI236_INTR_ENABLE : PCI236_INTR_DISABLE,
devpriv->lcr_iobase + PLX9052_INTCSR);
}
static bool pci236_intr_chk_clr_cb(struct comedi_device *dev)
{
struct pc236_private *devpriv = dev->private;
/* check if interrupt occurred */
if (!(inl(devpriv->lcr_iobase + PLX9052_INTCSR) &
PLX9052_INTCSR_LI1STAT))
return false;
/* clear the interrupt */
pci236_intr_update_cb(dev, devpriv->enable_irq);
return true;
}
static const struct pc236_board pc236_pci_board = {
.name = "pci236",
.intr_update_cb = pci236_intr_update_cb,
.intr_chk_clr_cb = pci236_intr_chk_clr_cb,
};
static int pci236_auto_attach(struct comedi_device *dev,
unsigned long context_unused)
{
struct pci_dev *pci_dev = comedi_to_pci_dev(dev);
struct pc236_private *devpriv;
unsigned long iobase;
int ret;
dev_info(dev->class_dev, "amplc_pci236: attach pci %s\n",
pci_name(pci_dev));
devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
if (!devpriv)
return -ENOMEM;
dev->board_ptr = &pc236_pci_board;
dev->board_name = pc236_pci_board.name;
ret = comedi_pci_enable(dev);
if (ret)
return ret;
devpriv->lcr_iobase = pci_resource_start(pci_dev, 1);
iobase = pci_resource_start(pci_dev, 2);
return amplc_pc236_common_attach(dev, iobase, pci_dev->irq,
IRQF_SHARED);
}
static struct comedi_driver amplc_pci236_driver = {
.driver_name = "amplc_pci236",
.module = THIS_MODULE,
.auto_attach = pci236_auto_attach,
.detach = comedi_pci_detach,
};
static const struct pci_device_id pci236_pci_table[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_AMPLICON, 0x0009) },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, pci236_pci_table);
static int amplc_pci236_pci_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
return comedi_pci_auto_config(dev, &lc_pci236_driver,
id->driver_data);
}
static struct pci_driver amplc_pci236_pci_driver = {
.name = "amplc_pci236",
.id_table = pci236_pci_table,
.probe = &lc_pci236_pci_probe,
.remove = comedi_pci_auto_unconfig,
};
module_comedi_pci_driver(amplc_pci236_driver, amplc_pci236_pci_driver);
MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi driver for Amplicon PCI236 DIO boards");
MODULE_LICENSE("GPL");
|
