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33#include <linux/module.h>
34#include "../comedidev.h"
35
36#include "comedi_8254.h"
37#include "8255.h"
38
39
40
41
42#define AIO12_8_STATUS_REG 0x00
43#define AIO12_8_STATUS_ADC_EOC BIT(7)
44#define AIO12_8_STATUS_PORT_C_COS BIT(6)
45#define AIO12_8_STATUS_IRQ_ENA BIT(2)
46#define AIO12_8_INTERRUPT_REG 0x01
47#define AIO12_8_INTERRUPT_ADC BIT(7)
48#define AIO12_8_INTERRUPT_COS BIT(6)
49#define AIO12_8_INTERRUPT_COUNTER1 BIT(5)
50#define AIO12_8_INTERRUPT_PORT_C3 BIT(4)
51#define AIO12_8_INTERRUPT_PORT_C0 BIT(3)
52#define AIO12_8_INTERRUPT_ENA BIT(2)
53#define AIO12_8_ADC_REG 0x02
54#define AIO12_8_ADC_MODE(x) (((x) & 0x3) << 6)
55#define AIO12_8_ADC_MODE_NORMAL AIO12_8_ADC_MODE(0)
56#define AIO12_8_ADC_MODE_INT_CLK AIO12_8_ADC_MODE(1)
57#define AIO12_8_ADC_MODE_STANDBY AIO12_8_ADC_MODE(2)
58#define AIO12_8_ADC_MODE_POWERDOWN AIO12_8_ADC_MODE(3)
59#define AIO12_8_ADC_ACQ(x) (((x) & 0x1) << 5)
60#define AIO12_8_ADC_ACQ_3USEC AIO12_8_ADC_ACQ(0)
61#define AIO12_8_ADC_ACQ_PROGRAM AIO12_8_ADC_ACQ(1)
62#define AIO12_8_ADC_RANGE(x) ((x) << 3)
63#define AIO12_8_ADC_CHAN(x) ((x) << 0)
64#define AIO12_8_DAC_REG(x) (0x04 + (x) * 2)
65#define AIO12_8_8254_BASE_REG 0x0c
66#define AIO12_8_8255_BASE_REG 0x10
67#define AIO12_8_DIO_CONTROL_REG 0x14
68#define AIO12_8_DIO_CONTROL_TST BIT(0)
69#define AIO12_8_ADC_TRIGGER_REG 0x15
70#define AIO12_8_ADC_TRIGGER_RANGE(x) ((x) << 3)
71#define AIO12_8_ADC_TRIGGER_CHAN(x) ((x) << 0)
72#define AIO12_8_TRIGGER_REG 0x16
73#define AIO12_8_TRIGGER_ADTRIG BIT(1)
74#define AIO12_8_TRIGGER_DACTRIG BIT(0)
75#define AIO12_8_COS_REG 0x17
76#define AIO12_8_DAC_ENABLE_REG 0x18
77#define AIO12_8_DAC_ENABLE_REF_ENA BIT(0)
78
79static const struct comedi_lrange aio_aio12_8_range = {
80 4, {
81 UNI_RANGE(5),
82 BIP_RANGE(5),
83 UNI_RANGE(10),
84 BIP_RANGE(10)
85 }
86};
87
88struct aio12_8_boardtype {
89 const char *name;
90 unsigned int has_ai:1;
91 unsigned int has_ao:1;
92};
93
94static const struct aio12_8_boardtype board_types[] = {
95 {
96 .name = "aio_aio12_8",
97 .has_ai = 1,
98 .has_ao = 1,
99 }, {
100 .name = "aio_ai12_8",
101 .has_ai = 1,
102 }, {
103 .name = "aio_ao12_4",
104 .has_ao = 1,
105 },
106};
107
108static int aio_aio12_8_ai_eoc(struct comedi_device *dev,
109 struct comedi_subdevice *s,
110 struct comedi_insn *insn,
111 unsigned long context)
112{
113 unsigned int status;
114
115 status = inb(dev->iobase + AIO12_8_STATUS_REG);
116 if (status & AIO12_8_STATUS_ADC_EOC)
117 return 0;
118 return -EBUSY;
119}
120
121static int aio_aio12_8_ai_read(struct comedi_device *dev,
122 struct comedi_subdevice *s,
123 struct comedi_insn *insn,
124 unsigned int *data)
125{
126 unsigned int chan = CR_CHAN(insn->chanspec);
127 unsigned int range = CR_RANGE(insn->chanspec);
128 unsigned int val;
129 unsigned char control;
130 int ret;
131 int i;
132
133
134
135
136
137 control = AIO12_8_ADC_MODE_NORMAL | AIO12_8_ADC_ACQ_3USEC |
138 AIO12_8_ADC_RANGE(range) | AIO12_8_ADC_CHAN(chan);
139
140
141 inb(dev->iobase + AIO12_8_STATUS_REG);
142
143 for (i = 0; i < insn->n; i++) {
144
145 outb(control, dev->iobase + AIO12_8_ADC_REG);
146
147
148 ret = comedi_timeout(dev, s, insn, aio_aio12_8_ai_eoc, 0);
149 if (ret)
150 return ret;
151
152 val = inw(dev->iobase + AIO12_8_ADC_REG) & s->maxdata;
153
154
155 if (comedi_range_is_bipolar(s, range))
156 val = comedi_offset_munge(s, val);
157
158 data[i] = val;
159 }
160
161 return insn->n;
162}
163
164static int aio_aio12_8_ao_insn_write(struct comedi_device *dev,
165 struct comedi_subdevice *s,
166 struct comedi_insn *insn,
167 unsigned int *data)
168{
169 unsigned int chan = CR_CHAN(insn->chanspec);
170 unsigned int val = s->readback[chan];
171 int i;
172
173
174 outb(AIO12_8_DAC_ENABLE_REF_ENA, dev->iobase + AIO12_8_DAC_ENABLE_REG);
175
176 for (i = 0; i < insn->n; i++) {
177 val = data[i];
178 outw(val, dev->iobase + AIO12_8_DAC_REG(chan));
179 }
180 s->readback[chan] = val;
181
182 return insn->n;
183}
184
185static int aio_aio12_8_counter_insn_config(struct comedi_device *dev,
186 struct comedi_subdevice *s,
187 struct comedi_insn *insn,
188 unsigned int *data)
189{
190 unsigned int chan = CR_CHAN(insn->chanspec);
191
192 switch (data[0]) {
193 case INSN_CONFIG_GET_CLOCK_SRC:
194
195
196
197
198 data[0] = 0;
199 data[1] = (chan == 1) ? I8254_OSC_BASE_1MHZ : 0;
200 break;
201 default:
202 return -EINVAL;
203 }
204
205 return insn->n;
206}
207
208static int aio_aio12_8_attach(struct comedi_device *dev,
209 struct comedi_devconfig *it)
210{
211 const struct aio12_8_boardtype *board = dev->board_ptr;
212 struct comedi_subdevice *s;
213 int ret;
214
215 ret = comedi_request_region(dev, it->options[0], 32);
216 if (ret)
217 return ret;
218
219 dev->pacer = comedi_8254_init(dev->iobase + AIO12_8_8254_BASE_REG,
220 0, I8254_IO8, 0);
221 if (!dev->pacer)
222 return -ENOMEM;
223
224 ret = comedi_alloc_subdevices(dev, 4);
225 if (ret)
226 return ret;
227
228
229 s = &dev->subdevices[0];
230 if (board->has_ai) {
231 s->type = COMEDI_SUBD_AI;
232 s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF;
233 s->n_chan = 8;
234 s->maxdata = 0x0fff;
235 s->range_table = &aio_aio12_8_range;
236 s->insn_read = aio_aio12_8_ai_read;
237 } else {
238 s->type = COMEDI_SUBD_UNUSED;
239 }
240
241
242 s = &dev->subdevices[1];
243 if (board->has_ao) {
244 s->type = COMEDI_SUBD_AO;
245 s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
246 s->n_chan = 4;
247 s->maxdata = 0x0fff;
248 s->range_table = &aio_aio12_8_range;
249 s->insn_write = aio_aio12_8_ao_insn_write;
250
251 ret = comedi_alloc_subdev_readback(s);
252 if (ret)
253 return ret;
254 } else {
255 s->type = COMEDI_SUBD_UNUSED;
256 }
257
258
259 s = &dev->subdevices[2];
260 ret = subdev_8255_init(dev, s, NULL, AIO12_8_8255_BASE_REG);
261 if (ret)
262 return ret;
263
264
265 s = &dev->subdevices[3];
266 comedi_8254_subdevice_init(s, dev->pacer);
267
268 dev->pacer->insn_config = aio_aio12_8_counter_insn_config;
269
270 return 0;
271}
272
273static struct comedi_driver aio_aio12_8_driver = {
274 .driver_name = "aio_aio12_8",
275 .module = THIS_MODULE,
276 .attach = aio_aio12_8_attach,
277 .detach = comedi_legacy_detach,
278 .board_name = &board_types[0].name,
279 .num_names = ARRAY_SIZE(board_types),
280 .offset = sizeof(struct aio12_8_boardtype),
281};
282module_comedi_driver(aio_aio12_8_driver);
283
284MODULE_AUTHOR("Comedi http://www.comedi.org");
285MODULE_DESCRIPTION("Comedi driver for Access I/O AIO12-8 Analog I/O Board");
286MODULE_LICENSE("GPL");
287
