2 comedi/drivers/dt2815.c
3 Hardware driver for Data Translation DT2815
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: Data Translation DT2815
27 Status: mostly complete, untested
28 Devices: [Data Translation] DT2815 (dt2815)
30 I'm not sure anyone has ever tested this board. If you have information
31 contrary, please update.
33 Configuration options:
34 [0] - I/O port base base address
36 [2] - Voltage unipolar/bipolar configuration
37 0 == unipolar 5V (0V -- +5V)
38 1 == bipolar 5V (-5V -- +5V)
39 [3] - Current offset configuration
40 0 == disabled (0mA -- +32mAV)
41 1 == enabled (+4mA -- +20mAV)
42 [4] - Firmware program configuration
43 0 == program 1 (see manual table 5-4)
44 1 == program 2 (see manual table 5-4)
45 2 == program 3 (see manual table 5-4)
46 3 == program 4 (see manual table 5-4)
47 [5] - Analog output 0 range configuration
50 [6] - Analog output 1 range configuration (same options)
51 [7] - Analog output 2 range configuration (same options)
52 [8] - Analog output 3 range configuration (same options)
53 [9] - Analog output 4 range configuration (same options)
54 [10] - Analog output 5 range configuration (same options)
55 [11] - Analog output 6 range configuration (same options)
56 [12] - Analog output 7 range configuration (same options)
59 #include "../comedidev.h"
61 #include <linux/ioport.h>
62 #include <linux/delay.h>
64 static const struct comedi_lrange
65 range_dt2815_ao_32_current
= {1, {RANGE_mA(0, 32)} };
67 static const struct comedi_lrange
68 range_dt2815_ao_20_current
= {1, {RANGE_mA(4, 20)} };
73 #define DT2815_STATUS 1
75 static int dt2815_attach(struct comedi_device
*dev
,
76 struct comedi_devconfig
*it
);
77 static int dt2815_detach(struct comedi_device
*dev
);
78 static struct comedi_driver driver_dt2815
= {
79 .driver_name
= "dt2815",
80 .module
= THIS_MODULE
,
81 .attach
= dt2815_attach
,
82 .detach
= dt2815_detach
,
85 static int __init
driver_dt2815_init_module(void)
87 return comedi_driver_register(&driver_dt2815
);
90 static void __exit
driver_dt2815_cleanup_module(void)
92 comedi_driver_unregister(&driver_dt2815
);
95 module_init(driver_dt2815_init_module
);
96 module_exit(driver_dt2815_cleanup_module
);
98 static void dt2815_free_resources(struct comedi_device
*dev
);
100 struct dt2815_private
{
102 const struct comedi_lrange
*range_type_list
[8];
103 unsigned int ao_readback
[8];
106 #define devpriv ((struct dt2815_private *)dev->private)
108 static int dt2815_wait_for_status(struct comedi_device
*dev
, int status
)
112 for (i
= 0; i
< 100; i
++) {
113 if (inb(dev
->iobase
+ DT2815_STATUS
) == status
)
119 static int dt2815_ao_insn_read(struct comedi_device
*dev
,
120 struct comedi_subdevice
*s
,
121 struct comedi_insn
*insn
, unsigned int *data
)
124 int chan
= CR_CHAN(insn
->chanspec
);
126 for (i
= 0; i
< insn
->n
; i
++)
127 data
[i
] = devpriv
->ao_readback
[chan
];
132 static int dt2815_ao_insn(struct comedi_device
*dev
, struct comedi_subdevice
*s
,
133 struct comedi_insn
*insn
, unsigned int *data
)
136 int chan
= CR_CHAN(insn
->chanspec
);
140 for (i
= 0; i
< insn
->n
; i
++) {
141 lo
= ((data
[i
] & 0x0f) << 4) | (chan
<< 1) | 0x01;
142 hi
= (data
[i
] & 0xff0) >> 4;
144 status
= dt2815_wait_for_status(dev
, 0x00);
146 printk(KERN_WARNING
"dt2815: failed to write low byte "
147 "on %d reason %x\n", chan
, status
);
151 outb(lo
, dev
->iobase
+ DT2815_DATA
);
153 status
= dt2815_wait_for_status(dev
, 0x10);
154 if (status
!= 0x10) {
155 printk(KERN_WARNING
"dt2815: failed to write high byte "
156 "on %d reason %x\n", chan
, status
);
159 devpriv
->ao_readback
[chan
] = data
[i
];
165 options[0] Board base address
166 options[1] IRQ (not applicable)
167 options[2] Voltage unipolar/bipolar configuration
168 0 == unipolar 5V (0V -- +5V)
169 1 == bipolar 5V (-5V -- +5V)
170 options[3] Current offset configuration
171 0 == disabled (0mA -- +32mAV)
172 1 == enabled (+4mA -- +20mAV)
173 options[4] Firmware program configuration
174 0 == program 1 (see manual table 5-4)
175 1 == program 2 (see manual table 5-4)
176 2 == program 3 (see manual table 5-4)
177 3 == program 4 (see manual table 5-4)
178 options[5] Analog output 0 range configuration
181 options[6] Analog output 1 range configuration
183 options[12] Analog output 7 range configuration
188 static int dt2815_attach(struct comedi_device
*dev
, struct comedi_devconfig
*it
)
190 struct comedi_subdevice
*s
;
192 const struct comedi_lrange
*current_range_type
, *voltage_range_type
;
193 unsigned long iobase
;
195 iobase
= it
->options
[0];
196 printk(KERN_INFO
"comedi%d: dt2815: 0x%04lx ", dev
->minor
, iobase
);
197 if (!request_region(iobase
, DT2815_SIZE
, "dt2815")) {
198 printk(KERN_WARNING
"I/O port conflict\n");
202 dev
->iobase
= iobase
;
203 dev
->board_name
= "dt2815";
205 if (alloc_subdevices(dev
, 1) < 0)
207 if (alloc_private(dev
, sizeof(struct dt2815_private
)) < 0)
212 s
->type
= COMEDI_SUBD_AO
;
213 s
->subdev_flags
= SDF_WRITABLE
;
216 s
->insn_write
= dt2815_ao_insn
;
217 s
->insn_read
= dt2815_ao_insn_read
;
218 s
->range_table_list
= devpriv
->range_type_list
;
220 current_range_type
= (it
->options
[3])
221 ? &range_dt2815_ao_20_current
: &range_dt2815_ao_32_current
;
222 voltage_range_type
= (it
->options
[2])
223 ? &range_bipolar5
: &range_unipolar5
;
224 for (i
= 0; i
< 8; i
++) {
225 devpriv
->range_type_list
[i
] = (it
->options
[5 + i
])
226 ? current_range_type
: voltage_range_type
;
230 outb(0x00, dev
->iobase
+ DT2815_STATUS
);
231 for (i
= 0; i
< 100; i
++) {
232 /* This is incredibly slow (approx 20 ms) */
236 status
= inb(dev
->iobase
+ DT2815_STATUS
);
238 unsigned int program
;
239 program
= (it
->options
[4] & 0x3) << 3 | 0x7;
240 outb(program
, dev
->iobase
+ DT2815_DATA
);
241 printk(KERN_INFO
", program: 0x%x (@t=%d)\n",
244 } else if (status
!= 0x00) {
245 printk(KERN_WARNING
"dt2815: unexpected status 0x%x "
246 "(@t=%d)\n", status
, i
);
248 outb(0x00, dev
->iobase
+ DT2815_STATUS
);
255 static void dt2815_free_resources(struct comedi_device
*dev
)
258 release_region(dev
->iobase
, DT2815_SIZE
);
261 static int dt2815_detach(struct comedi_device
*dev
)
263 printk(KERN_INFO
"comedi%d: dt2815: remove\n", dev
->minor
);
265 dt2815_free_resources(dev
);
270 MODULE_AUTHOR("Comedi http://www.comedi.org");
271 MODULE_DESCRIPTION("Comedi low-level driver");
272 MODULE_LICENSE("GPL");