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7623199a PM |
1 | /* |
2 | ||
3 | comedi/drivers/aio_aio12_8.c | |
4 | ||
5 | Driver for Acces I/O Products PC-104 AIO12-8 Analog I/O Board | |
6 | Copyright (C) 2006 C&C Technologies, Inc. | |
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 | ||
25 | Driver: aio_aio12_8 | |
26 | Description: Acces I/O Products PC-104 AIO12-8 Analog I/O Board | |
27 | Author: Pablo Mejia <pablo.mejia@cctechnol.com> | |
28 | Devices: | |
29 | [Acces I/O] PC-104 AIO12-8 | |
30 | Status: experimental | |
31 | ||
32 | Configuration Options: | |
33 | [0] - I/O port base address | |
34 | ||
35 | Notes: | |
36 | ||
37 | Only synchronous operations are supported. | |
38 | ||
39 | */ | |
40 | ||
41 | #include "../comedidev.h" | |
42 | #include <linux/ioport.h> | |
43 | #include "8255.h" | |
44 | ||
45 | #define AIO12_8_STATUS 0x00 | |
46 | #define AIO12_8_INTERRUPT 0x01 | |
47 | #define AIO12_8_ADC 0x02 | |
48 | #define AIO12_8_DAC_0 0x04 | |
49 | #define AIO12_8_DAC_1 0x06 | |
50 | #define AIO12_8_DAC_2 0x08 | |
51 | #define AIO12_8_DAC_3 0x0A | |
52 | #define AIO12_8_COUNTER_0 0x0C | |
53 | #define AIO12_8_COUNTER_1 0x0D | |
54 | #define AIO12_8_COUNTER_2 0x0E | |
55 | #define AIO12_8_COUNTER_CONTROL 0x0F | |
56 | #define AIO12_8_DIO_0 0x10 | |
57 | #define AIO12_8_DIO_1 0x11 | |
58 | #define AIO12_8_DIO_2 0x12 | |
59 | #define AIO12_8_DIO_STATUS 0x13 | |
60 | #define AIO12_8_DIO_CONTROL 0x14 | |
61 | #define AIO12_8_ADC_TRIGGER_CONTROL 0x15 | |
62 | #define AIO12_8_TRIGGER 0x16 | |
63 | #define AIO12_8_POWER 0x17 | |
64 | ||
65 | #define STATUS_ADC_EOC 0x80 | |
66 | ||
67 | #define ADC_MODE_NORMAL 0x00 | |
68 | #define ADC_MODE_INTERNAL_CLOCK 0x40 | |
69 | #define ADC_MODE_STANDBY 0x80 | |
70 | #define ADC_MODE_POWERDOWN 0xC0 | |
71 | ||
72 | #define DAC_ENABLE 0x18 | |
73 | ||
74753712 | 74 | struct aio12_8_boardtype { |
7623199a | 75 | const char *name; |
74753712 | 76 | }; |
7623199a | 77 | |
74753712 | 78 | static const struct aio12_8_boardtype board_types[] = { |
7623199a PM |
79 | { |
80 | name: "aio_aio12_8"}, | |
81 | }; | |
82 | ||
74753712 | 83 | #define thisboard ((const struct aio12_8_boardtype *) dev->board_ptr) |
7623199a | 84 | |
4651db97 | 85 | struct aio12_8_private { |
790c5541 | 86 | unsigned int ao_readback[4]; |
4651db97 | 87 | }; |
7623199a | 88 | |
4651db97 | 89 | #define devpriv ((struct aio12_8_private *) dev->private) |
7623199a | 90 | |
34c43922 | 91 | static int aio_aio12_8_ai_read(struct comedi_device * dev, struct comedi_subdevice * s, |
90035c08 | 92 | struct comedi_insn * insn, unsigned int * data) |
7623199a PM |
93 | { |
94 | int n; | |
95 | unsigned char control = | |
96 | ADC_MODE_NORMAL | | |
97 | (CR_RANGE(insn->chanspec) << 3) | CR_CHAN(insn->chanspec); | |
98 | ||
99 | //read status to clear EOC latch | |
100 | inb(dev->iobase + AIO12_8_STATUS); | |
101 | ||
102 | for (n = 0; n < insn->n; n++) { | |
103 | int timeout = 5; | |
104 | ||
105 | // Setup and start conversion | |
106 | outb(control, dev->iobase + AIO12_8_ADC); | |
107 | ||
108 | // Wait for conversion to complete | |
109 | while (timeout && | |
110 | !(inb(dev->iobase + AIO12_8_STATUS) & STATUS_ADC_EOC)) { | |
111 | timeout--; | |
112 | printk("timeout %d\n", timeout); | |
113 | comedi_udelay(1); | |
114 | } | |
115 | if (timeout == 0) { | |
116 | comedi_error(dev, "ADC timeout"); | |
117 | return -EIO; | |
118 | } | |
119 | ||
120 | data[n] = inw(dev->iobase + AIO12_8_ADC) & 0x0FFF; | |
121 | } | |
122 | return n; | |
123 | } | |
124 | ||
34c43922 | 125 | static int aio_aio12_8_ao_read(struct comedi_device * dev, struct comedi_subdevice * s, |
90035c08 | 126 | struct comedi_insn * insn, unsigned int * data) |
7623199a PM |
127 | { |
128 | int i; | |
129 | int val = devpriv->ao_readback[CR_CHAN(insn->chanspec)]; | |
130 | ||
131 | for (i = 0; i < insn->n; i++) | |
132 | data[i] = val; | |
133 | return insn->n; | |
134 | } | |
135 | ||
34c43922 | 136 | static int aio_aio12_8_ao_write(struct comedi_device * dev, struct comedi_subdevice * s, |
90035c08 | 137 | struct comedi_insn * insn, unsigned int * data) |
7623199a PM |
138 | { |
139 | int i; | |
140 | int chan = CR_CHAN(insn->chanspec); | |
141 | unsigned long port = dev->iobase + AIO12_8_DAC_0 + (2 * chan); | |
142 | ||
143 | //enable DACs | |
144 | outb(0x01, dev->iobase + DAC_ENABLE); | |
145 | ||
146 | for (i = 0; i < insn->n; i++) { | |
147 | outb(data[i] & 0xFF, port); // LSB | |
148 | outb((data[i] >> 8) & 0x0F, port + 1); // MSB | |
149 | devpriv->ao_readback[chan] = data[i]; | |
150 | } | |
151 | return insn->n; | |
152 | } | |
153 | ||
9ced1de6 | 154 | static const struct comedi_lrange range_aio_aio12_8 = { |
7623199a PM |
155 | 4, |
156 | { | |
157 | UNI_RANGE(5), | |
158 | BIP_RANGE(5), | |
159 | UNI_RANGE(10), | |
160 | BIP_RANGE(10), | |
161 | } | |
162 | }; | |
163 | ||
0707bb04 | 164 | static int aio_aio12_8_attach(struct comedi_device * dev, struct comedi_devconfig * it) |
7623199a PM |
165 | { |
166 | int iobase; | |
34c43922 | 167 | struct comedi_subdevice *s; |
7623199a PM |
168 | |
169 | iobase = it->options[0]; | |
170 | if (!request_region(iobase, 24, "aio_aio12_8")) { | |
171 | printk("I/O port conflict"); | |
172 | return -EIO; | |
173 | } | |
174 | ||
175 | dev->board_name = thisboard->name; | |
176 | ||
177 | dev->iobase = iobase; | |
178 | ||
4651db97 | 179 | if (alloc_private(dev, sizeof(struct aio12_8_private)) < 0) |
7623199a PM |
180 | return -ENOMEM; |
181 | ||
182 | if (alloc_subdevices(dev, 3) < 0) | |
183 | return -ENOMEM; | |
184 | ||
185 | s = &dev->subdevices[0]; | |
186 | s->type = COMEDI_SUBD_AI; | |
187 | s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF; | |
188 | s->n_chan = 8; | |
189 | s->maxdata = (1 << 12) - 1; | |
190 | s->range_table = &range_aio_aio12_8; | |
191 | s->insn_read = aio_aio12_8_ai_read; | |
192 | ||
193 | s = &dev->subdevices[1]; | |
194 | s->type = COMEDI_SUBD_AO; | |
195 | s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_DIFF; | |
196 | s->n_chan = 4; | |
197 | s->maxdata = (1 << 12) - 1; | |
198 | s->range_table = &range_aio_aio12_8; | |
199 | s->insn_read = aio_aio12_8_ao_read; | |
200 | s->insn_write = aio_aio12_8_ao_write; | |
201 | ||
202 | s = &dev->subdevices[2]; | |
203 | subdev_8255_init(dev, s, NULL, dev->iobase + AIO12_8_DIO_0); | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
71b5f4f1 | 208 | static int aio_aio12_8_detach(struct comedi_device * dev) |
7623199a PM |
209 | { |
210 | subdev_8255_cleanup(dev, &dev->subdevices[2]); | |
211 | if (dev->iobase) | |
212 | release_region(dev->iobase, 24); | |
213 | return 0; | |
214 | } | |
215 | ||
139dfbdf | 216 | static struct comedi_driver driver_aio_aio12_8 = { |
7623199a PM |
217 | driver_name:"aio_aio12_8", |
218 | module:THIS_MODULE, | |
219 | attach:aio_aio12_8_attach, | |
220 | detach:aio_aio12_8_detach, | |
221 | board_name:&board_types[0].name, | |
222 | num_names:1, | |
74753712 | 223 | offset:sizeof(struct aio12_8_boardtype), |
7623199a PM |
224 | }; |
225 | ||
226 | COMEDI_INITCLEANUP(driver_aio_aio12_8); |