2 comedi/drivers/rti802.c
3 Hardware driver for Analog Devices RTI-802 board
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 1999 Anders Blomdell <anders.blomdell@control.lth.se>
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 Description: Analog Devices RTI-802
26 Author: Anders Blomdell <anders.blomdell@control.lth.se>
27 Devices: [Analog Devices] RTI-802 (rti802)
30 Configuration Options:
33 [2] - dac#0 0=two's comp, 1=straight
34 [3] - dac#0 0=bipolar, 1=unipolar
40 #include "../comedidev.h"
42 #include <linux/ioport.h>
46 #define RTI802_SELECT 0
47 #define RTI802_DATALOW 1
48 #define RTI802_DATAHIGH 2
50 static int rti802_attach(struct comedi_device
*dev
,
51 struct comedi_devconfig
*it
);
52 static int rti802_detach(struct comedi_device
*dev
);
53 static struct comedi_driver driver_rti802
= {
54 .driver_name
= "rti802",
55 .module
= THIS_MODULE
,
56 .attach
= rti802_attach
,
57 .detach
= rti802_detach
,
60 COMEDI_INITCLEANUP(driver_rti802
);
62 struct rti802_private
{
64 dac_2comp
, dac_straight
66 const struct comedi_lrange
*range_type_list
[8];
67 unsigned int ao_readback
[8];
70 #define devpriv ((struct rti802_private *)dev->private)
72 static int rti802_ao_insn_read(struct comedi_device
*dev
,
73 struct comedi_subdevice
*s
,
74 struct comedi_insn
*insn
, unsigned int *data
)
78 for (i
= 0; i
< insn
->n
; i
++)
79 data
[i
] = devpriv
->ao_readback
[CR_CHAN(insn
->chanspec
)];
84 static int rti802_ao_insn_write(struct comedi_device
*dev
,
85 struct comedi_subdevice
*s
,
86 struct comedi_insn
*insn
, unsigned int *data
)
89 int chan
= CR_CHAN(insn
->chanspec
);
91 for (i
= 0; i
< insn
->n
; i
++) {
92 d
= devpriv
->ao_readback
[chan
] = data
[i
];
93 if (devpriv
->dac_coding
[chan
] == dac_2comp
)
95 outb(chan
, dev
->iobase
+ RTI802_SELECT
);
96 outb(d
& 0xff, dev
->iobase
+ RTI802_DATALOW
);
97 outb(d
>> 8, dev
->iobase
+ RTI802_DATAHIGH
);
102 static int rti802_attach(struct comedi_device
*dev
, struct comedi_devconfig
*it
)
104 struct comedi_subdevice
*s
;
106 unsigned long iobase
;
108 iobase
= it
->options
[0];
109 printk(KERN_INFO
"comedi%d: rti802: 0x%04lx ", dev
->minor
, iobase
);
110 if (!request_region(iobase
, RTI802_SIZE
, "rti802")) {
111 printk(KERN_WARNING
"I/O port conflict\n");
114 dev
->iobase
= iobase
;
116 dev
->board_name
= "rti802";
118 if (alloc_subdevices(dev
, 1) < 0
119 || alloc_private(dev
, sizeof(struct rti802_private
))) {
125 s
->type
= COMEDI_SUBD_AO
;
126 s
->subdev_flags
= SDF_WRITABLE
;
129 s
->insn_read
= rti802_ao_insn_read
;
130 s
->insn_write
= rti802_ao_insn_write
;
131 s
->range_table_list
= devpriv
->range_type_list
;
133 for (i
= 0; i
< 8; i
++) {
134 devpriv
->dac_coding
[i
] = (it
->options
[3 + 2 * i
])
137 devpriv
->range_type_list
[i
] = (it
->options
[2 + 2 * i
])
138 ? &range_unipolar10
: &range_bipolar10
;
144 static int rti802_detach(struct comedi_device
*dev
)
146 printk(KERN_INFO
"comedi%d: rti802: remove\n", dev
->minor
);
149 release_region(dev
->iobase
, RTI802_SIZE
);