Commit | Line | Data |
---|---|---|
d6a929b7 DS |
1 | /* |
2 | comedi/drivers/dt2815.c | |
3 | Hardware driver for Data Translation DT2815 | |
4 | ||
5 | COMEDI - Linux Control and Measurement Device Interface | |
6 | Copyright (C) 1999 Anders Blomdell <anders.blomdell@control.lth.se> | |
7 | ||
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. | |
12 | ||
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. | |
17 | ||
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. | |
21 | ||
22 | */ | |
23 | /* | |
24 | Driver: dt2815 | |
25 | Description: Data Translation DT2815 | |
26 | Author: ds | |
27 | Status: mostly complete, untested | |
28 | Devices: [Data Translation] DT2815 (dt2815) | |
29 | ||
30 | I'm not sure anyone has ever tested this board. If you have information | |
31 | contrary, please update. | |
32 | ||
33 | Configuration options: | |
34 | [0] - I/O port base base address | |
35 | [1] - IRQ (unused) | |
36 | [2] - Voltage unipolar/bipolar configuration | |
0acc516a BA |
37 | 0 == unipolar 5V (0V -- +5V) |
38 | 1 == bipolar 5V (-5V -- +5V) | |
d6a929b7 | 39 | [3] - Current offset configuration |
0acc516a BA |
40 | 0 == disabled (0mA -- +32mAV) |
41 | 1 == enabled (+4mA -- +20mAV) | |
d6a929b7 | 42 | [4] - Firmware program configuration |
0acc516a BA |
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) | |
d6a929b7 | 47 | [5] - Analog output 0 range configuration |
0acc516a BA |
48 | 0 == voltage |
49 | 1 == current | |
d6a929b7 DS |
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) | |
57 | */ | |
58 | ||
59 | #include "../comedidev.h" | |
60 | ||
61 | #include <linux/ioport.h> | |
62 | #include <linux/delay.h> | |
63 | ||
0acc516a BA |
64 | static const struct comedi_lrange |
65 | range_dt2815_ao_32_current = {1, {RANGE_mA(0, 32)} }; | |
0a85b6f0 | 66 | |
0acc516a BA |
67 | static const struct comedi_lrange |
68 | range_dt2815_ao_20_current = {1, {RANGE_mA(4, 20)} }; | |
d6a929b7 DS |
69 | |
70 | #define DT2815_SIZE 2 | |
71 | ||
72 | #define DT2815_DATA 0 | |
73 | #define DT2815_STATUS 1 | |
74 | ||
0a85b6f0 MT |
75 | static int dt2815_attach(struct comedi_device *dev, |
76 | struct comedi_devconfig *it); | |
da91b269 | 77 | static int dt2815_detach(struct comedi_device *dev); |
139dfbdf | 78 | static struct comedi_driver driver_dt2815 = { |
68c3dbff BP |
79 | .driver_name = "dt2815", |
80 | .module = THIS_MODULE, | |
81 | .attach = dt2815_attach, | |
82 | .detach = dt2815_detach, | |
d6a929b7 DS |
83 | }; |
84 | ||
7114a280 AT |
85 | static int __init driver_dt2815_init_module(void) |
86 | { | |
87 | return comedi_driver_register(&driver_dt2815); | |
88 | } | |
89 | ||
90 | static void __exit driver_dt2815_cleanup_module(void) | |
91 | { | |
92 | comedi_driver_unregister(&driver_dt2815); | |
93 | } | |
94 | ||
95 | module_init(driver_dt2815_init_module); | |
96 | module_exit(driver_dt2815_cleanup_module); | |
d6a929b7 | 97 | |
da91b269 | 98 | static void dt2815_free_resources(struct comedi_device *dev); |
d6a929b7 | 99 | |
0b011a6f BP |
100 | struct dt2815_private { |
101 | ||
9ced1de6 | 102 | const struct comedi_lrange *range_type_list[8]; |
790c5541 | 103 | unsigned int ao_readback[8]; |
0b011a6f BP |
104 | }; |
105 | ||
0b011a6f | 106 | #define devpriv ((struct dt2815_private *)dev->private) |
d6a929b7 | 107 | |
da91b269 | 108 | static int dt2815_wait_for_status(struct comedi_device *dev, int status) |
d6a929b7 DS |
109 | { |
110 | int i; | |
111 | ||
112 | for (i = 0; i < 100; i++) { | |
113 | if (inb(dev->iobase + DT2815_STATUS) == status) | |
114 | break; | |
115 | } | |
116 | return status; | |
117 | } | |
118 | ||
0a85b6f0 MT |
119 | static int dt2815_ao_insn_read(struct comedi_device *dev, |
120 | struct comedi_subdevice *s, | |
121 | struct comedi_insn *insn, unsigned int *data) | |
d6a929b7 DS |
122 | { |
123 | int i; | |
124 | int chan = CR_CHAN(insn->chanspec); | |
125 | ||
0acc516a | 126 | for (i = 0; i < insn->n; i++) |
d6a929b7 | 127 | data[i] = devpriv->ao_readback[chan]; |
d6a929b7 DS |
128 | |
129 | return i; | |
130 | } | |
131 | ||
da91b269 | 132 | static int dt2815_ao_insn(struct comedi_device *dev, struct comedi_subdevice *s, |
0a85b6f0 | 133 | struct comedi_insn *insn, unsigned int *data) |
d6a929b7 DS |
134 | { |
135 | int i; | |
136 | int chan = CR_CHAN(insn->chanspec); | |
137 | unsigned int status; | |
138 | unsigned int lo, hi; | |
139 | ||
140 | for (i = 0; i < insn->n; i++) { | |
141 | lo = ((data[i] & 0x0f) << 4) | (chan << 1) | 0x01; | |
142 | hi = (data[i] & 0xff0) >> 4; | |
143 | ||
144 | status = dt2815_wait_for_status(dev, 0x00); | |
145 | if (status != 0) { | |
0acc516a BA |
146 | printk(KERN_WARNING "dt2815: failed to write low byte " |
147 | "on %d reason %x\n", chan, status); | |
d6a929b7 DS |
148 | return -EBUSY; |
149 | } | |
150 | ||
151 | outb(lo, dev->iobase + DT2815_DATA); | |
152 | ||
153 | status = dt2815_wait_for_status(dev, 0x10); | |
154 | if (status != 0x10) { | |
0acc516a BA |
155 | printk(KERN_WARNING "dt2815: failed to write high byte " |
156 | "on %d reason %x\n", chan, status); | |
d6a929b7 DS |
157 | return -EBUSY; |
158 | } | |
159 | devpriv->ao_readback[chan] = data[i]; | |
160 | } | |
161 | return i; | |
162 | } | |
163 | ||
164 | /* | |
165 | options[0] Board base address | |
166 | options[1] IRQ (not applicable) | |
167 | options[2] Voltage unipolar/bipolar configuration | |
0acc516a BA |
168 | 0 == unipolar 5V (0V -- +5V) |
169 | 1 == bipolar 5V (-5V -- +5V) | |
d6a929b7 | 170 | options[3] Current offset configuration |
0acc516a BA |
171 | 0 == disabled (0mA -- +32mAV) |
172 | 1 == enabled (+4mA -- +20mAV) | |
d6a929b7 | 173 | options[4] Firmware program configuration |
0acc516a BA |
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) | |
d6a929b7 | 178 | options[5] Analog output 0 range configuration |
0acc516a BA |
179 | 0 == voltage |
180 | 1 == current | |
d6a929b7 DS |
181 | options[6] Analog output 1 range configuration |
182 | ... | |
183 | options[12] Analog output 7 range configuration | |
0acc516a BA |
184 | 0 == voltage |
185 | 1 == current | |
d6a929b7 DS |
186 | */ |
187 | ||
da91b269 | 188 | static int dt2815_attach(struct comedi_device *dev, struct comedi_devconfig *it) |
d6a929b7 | 189 | { |
34c43922 | 190 | struct comedi_subdevice *s; |
d6a929b7 | 191 | int i; |
9ced1de6 | 192 | const struct comedi_lrange *current_range_type, *voltage_range_type; |
d6a929b7 DS |
193 | unsigned long iobase; |
194 | ||
195 | iobase = it->options[0]; | |
0acc516a | 196 | printk(KERN_INFO "comedi%d: dt2815: 0x%04lx ", dev->minor, iobase); |
d6a929b7 | 197 | if (!request_region(iobase, DT2815_SIZE, "dt2815")) { |
0acc516a | 198 | printk(KERN_WARNING "I/O port conflict\n"); |
d6a929b7 DS |
199 | return -EIO; |
200 | } | |
201 | ||
202 | dev->iobase = iobase; | |
203 | dev->board_name = "dt2815"; | |
204 | ||
205 | if (alloc_subdevices(dev, 1) < 0) | |
206 | return -ENOMEM; | |
0b011a6f | 207 | if (alloc_private(dev, sizeof(struct dt2815_private)) < 0) |
d6a929b7 DS |
208 | return -ENOMEM; |
209 | ||
210 | s = dev->subdevices; | |
211 | /* ao subdevice */ | |
212 | s->type = COMEDI_SUBD_AO; | |
213 | s->subdev_flags = SDF_WRITABLE; | |
214 | s->maxdata = 0xfff; | |
215 | s->n_chan = 8; | |
216 | s->insn_write = dt2815_ao_insn; | |
217 | s->insn_read = dt2815_ao_insn_read; | |
218 | s->range_table_list = devpriv->range_type_list; | |
219 | ||
220 | current_range_type = (it->options[3]) | |
0a85b6f0 | 221 | ? &range_dt2815_ao_20_current : &range_dt2815_ao_32_current; |
d6a929b7 | 222 | voltage_range_type = (it->options[2]) |
0a85b6f0 | 223 | ? &range_bipolar5 : &range_unipolar5; |
d6a929b7 DS |
224 | for (i = 0; i < 8; i++) { |
225 | devpriv->range_type_list[i] = (it->options[5 + i]) | |
0a85b6f0 | 226 | ? current_range_type : voltage_range_type; |
d6a929b7 DS |
227 | } |
228 | ||
229 | /* Init the 2815 */ | |
230 | outb(0x00, dev->iobase + DT2815_STATUS); | |
231 | for (i = 0; i < 100; i++) { | |
232 | /* This is incredibly slow (approx 20 ms) */ | |
233 | unsigned int status; | |
234 | ||
5f74ea14 | 235 | udelay(1000); |
d6a929b7 DS |
236 | status = inb(dev->iobase + DT2815_STATUS); |
237 | if (status == 4) { | |
238 | unsigned int program; | |
239 | program = (it->options[4] & 0x3) << 3 | 0x7; | |
240 | outb(program, dev->iobase + DT2815_DATA); | |
0acc516a BA |
241 | printk(KERN_INFO ", program: 0x%x (@t=%d)\n", |
242 | program, i); | |
d6a929b7 DS |
243 | break; |
244 | } else if (status != 0x00) { | |
0acc516a BA |
245 | printk(KERN_WARNING "dt2815: unexpected status 0x%x " |
246 | "(@t=%d)\n", status, i); | |
247 | if (status & 0x60) | |
d6a929b7 | 248 | outb(0x00, dev->iobase + DT2815_STATUS); |
d6a929b7 DS |
249 | } |
250 | } | |
251 | ||
d6a929b7 DS |
252 | return 0; |
253 | } | |
254 | ||
da91b269 | 255 | static void dt2815_free_resources(struct comedi_device *dev) |
d6a929b7 DS |
256 | { |
257 | if (dev->iobase) | |
258 | release_region(dev->iobase, DT2815_SIZE); | |
259 | } | |
260 | ||
da91b269 | 261 | static int dt2815_detach(struct comedi_device *dev) |
d6a929b7 | 262 | { |
0acc516a | 263 | printk(KERN_INFO "comedi%d: dt2815: remove\n", dev->minor); |
d6a929b7 DS |
264 | |
265 | dt2815_free_resources(dev); | |
266 | ||
267 | return 0; | |
268 | } | |
90f703d3 AT |
269 | |
270 | MODULE_AUTHOR("Comedi http://www.comedi.org"); | |
271 | MODULE_DESCRIPTION("Comedi low-level driver"); | |
272 | MODULE_LICENSE("GPL"); |