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42#include <linux/module.h>
43#include <linux/delay.h>
44#include <linux/interrupt.h>
45#include "../comedidev.h"
46
47
48
49
50#define RTI800_CSR 0x00
51#define RTI800_CSR_BUSY BIT(7)
52#define RTI800_CSR_DONE BIT(6)
53#define RTI800_CSR_OVERRUN BIT(5)
54#define RTI800_CSR_TCR BIT(4)
55#define RTI800_CSR_DMA_ENAB BIT(3)
56#define RTI800_CSR_INTR_TC BIT(2)
57#define RTI800_CSR_INTR_EC BIT(1)
58#define RTI800_CSR_INTR_OVRN BIT(0)
59#define RTI800_MUXGAIN 0x01
60#define RTI800_CONVERT 0x02
61#define RTI800_ADCLO 0x03
62#define RTI800_ADCHI 0x04
63#define RTI800_DAC0LO 0x05
64#define RTI800_DAC0HI 0x06
65#define RTI800_DAC1LO 0x07
66#define RTI800_DAC1HI 0x08
67#define RTI800_CLRFLAGS 0x09
68#define RTI800_DI 0x0a
69#define RTI800_DO 0x0b
70#define RTI800_9513A_DATA 0x0c
71#define RTI800_9513A_CNTRL 0x0d
72#define RTI800_9513A_STATUS 0x0d
73
74static const struct comedi_lrange range_rti800_ai_10_bipolar = {
75 4, {
76 BIP_RANGE(10),
77 BIP_RANGE(1),
78 BIP_RANGE(0.1),
79 BIP_RANGE(0.02)
80 }
81};
82
83static const struct comedi_lrange range_rti800_ai_5_bipolar = {
84 4, {
85 BIP_RANGE(5),
86 BIP_RANGE(0.5),
87 BIP_RANGE(0.05),
88 BIP_RANGE(0.01)
89 }
90};
91
92static const struct comedi_lrange range_rti800_ai_unipolar = {
93 4, {
94 UNI_RANGE(10),
95 UNI_RANGE(1),
96 UNI_RANGE(0.1),
97 UNI_RANGE(0.02)
98 }
99};
100
101static const struct comedi_lrange *const rti800_ai_ranges[] = {
102 &range_rti800_ai_10_bipolar,
103 &range_rti800_ai_5_bipolar,
104 &range_rti800_ai_unipolar,
105};
106
107static const struct comedi_lrange *const rti800_ao_ranges[] = {
108 &range_bipolar10,
109 &range_unipolar10,
110};
111
112struct rti800_board {
113 const char *name;
114 int has_ao;
115};
116
117static const struct rti800_board rti800_boardtypes[] = {
118 {
119 .name = "rti800",
120 }, {
121 .name = "rti815",
122 .has_ao = 1,
123 },
124};
125
126struct rti800_private {
127 bool adc_2comp;
128 bool dac_2comp[2];
129 const struct comedi_lrange *ao_range_type_list[2];
130 unsigned char muxgain_bits;
131};
132
133static int rti800_ai_eoc(struct comedi_device *dev,
134 struct comedi_subdevice *s,
135 struct comedi_insn *insn,
136 unsigned long context)
137{
138 unsigned char status;
139
140 status = inb(dev->iobase + RTI800_CSR);
141 if (status & RTI800_CSR_OVERRUN) {
142 outb(0, dev->iobase + RTI800_CLRFLAGS);
143 return -EOVERFLOW;
144 }
145 if (status & RTI800_CSR_DONE)
146 return 0;
147 return -EBUSY;
148}
149
150static int rti800_ai_insn_read(struct comedi_device *dev,
151 struct comedi_subdevice *s,
152 struct comedi_insn *insn,
153 unsigned int *data)
154{
155 struct rti800_private *devpriv = dev->private;
156 unsigned int chan = CR_CHAN(insn->chanspec);
157 unsigned int gain = CR_RANGE(insn->chanspec);
158 unsigned char muxgain_bits;
159 int ret;
160 int i;
161
162 inb(dev->iobase + RTI800_ADCHI);
163 outb(0, dev->iobase + RTI800_CLRFLAGS);
164
165 muxgain_bits = chan | (gain << 5);
166 if (muxgain_bits != devpriv->muxgain_bits) {
167 devpriv->muxgain_bits = muxgain_bits;
168 outb(devpriv->muxgain_bits, dev->iobase + RTI800_MUXGAIN);
169
170
171
172
173 if (insn->n > 0) {
174 int delay = (gain == 0) ? 10 :
175 (gain == 1) ? 20 :
176 (gain == 2) ? 40 : 80;
177
178 udelay(delay);
179 }
180 }
181
182 for (i = 0; i < insn->n; i++) {
183 unsigned int val;
184
185 outb(0, dev->iobase + RTI800_CONVERT);
186
187 ret = comedi_timeout(dev, s, insn, rti800_ai_eoc, 0);
188 if (ret)
189 return ret;
190
191 val = inb(dev->iobase + RTI800_ADCLO);
192 val |= (inb(dev->iobase + RTI800_ADCHI) & 0xf) << 8;
193
194 if (devpriv->adc_2comp)
195 val = comedi_offset_munge(s, val);
196
197 data[i] = val;
198 }
199
200 return insn->n;
201}
202
203static int rti800_ao_insn_write(struct comedi_device *dev,
204 struct comedi_subdevice *s,
205 struct comedi_insn *insn,
206 unsigned int *data)
207{
208 struct rti800_private *devpriv = dev->private;
209 unsigned int chan = CR_CHAN(insn->chanspec);
210 int reg_lo = chan ? RTI800_DAC1LO : RTI800_DAC0LO;
211 int reg_hi = chan ? RTI800_DAC1HI : RTI800_DAC0HI;
212 int i;
213
214 for (i = 0; i < insn->n; i++) {
215 unsigned int val = data[i];
216
217 s->readback[chan] = val;
218
219 if (devpriv->dac_2comp[chan])
220 val = comedi_offset_munge(s, val);
221
222 outb(val & 0xff, dev->iobase + reg_lo);
223 outb((val >> 8) & 0xff, dev->iobase + reg_hi);
224 }
225
226 return insn->n;
227}
228
229static int rti800_di_insn_bits(struct comedi_device *dev,
230 struct comedi_subdevice *s,
231 struct comedi_insn *insn,
232 unsigned int *data)
233{
234 data[1] = inb(dev->iobase + RTI800_DI);
235 return insn->n;
236}
237
238static int rti800_do_insn_bits(struct comedi_device *dev,
239 struct comedi_subdevice *s,
240 struct comedi_insn *insn,
241 unsigned int *data)
242{
243 if (comedi_dio_update_state(s, data)) {
244
245 outb(s->state ^ 0xff, dev->iobase + RTI800_DO);
246 }
247
248 data[1] = s->state;
249
250 return insn->n;
251}
252
253static int rti800_attach(struct comedi_device *dev, struct comedi_devconfig *it)
254{
255 const struct rti800_board *board = dev->board_ptr;
256 struct rti800_private *devpriv;
257 struct comedi_subdevice *s;
258 int ret;
259
260 ret = comedi_request_region(dev, it->options[0], 0x10);
261 if (ret)
262 return ret;
263
264 outb(0, dev->iobase + RTI800_CSR);
265 inb(dev->iobase + RTI800_ADCHI);
266 outb(0, dev->iobase + RTI800_CLRFLAGS);
267
268 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
269 if (!devpriv)
270 return -ENOMEM;
271
272 devpriv->adc_2comp = (it->options[4] == 0);
273 devpriv->dac_2comp[0] = (it->options[6] == 0);
274 devpriv->dac_2comp[1] = (it->options[8] == 0);
275
276 devpriv->muxgain_bits = 0xff;
277
278 ret = comedi_alloc_subdevices(dev, 4);
279 if (ret)
280 return ret;
281
282 s = &dev->subdevices[0];
283
284 s->type = COMEDI_SUBD_AI;
285 s->subdev_flags = SDF_READABLE | SDF_GROUND;
286 s->n_chan = (it->options[2] ? 16 : 8);
287 s->insn_read = rti800_ai_insn_read;
288 s->maxdata = 0x0fff;
289 s->range_table = (it->options[3] < ARRAY_SIZE(rti800_ai_ranges))
290 ? rti800_ai_ranges[it->options[3]]
291 : &range_unknown;
292
293 s = &dev->subdevices[1];
294 if (board->has_ao) {
295
296 s->type = COMEDI_SUBD_AO;
297 s->subdev_flags = SDF_WRITABLE;
298 s->n_chan = 2;
299 s->maxdata = 0x0fff;
300 s->range_table_list = devpriv->ao_range_type_list;
301 devpriv->ao_range_type_list[0] =
302 (it->options[5] < ARRAY_SIZE(rti800_ao_ranges))
303 ? rti800_ao_ranges[it->options[5]]
304 : &range_unknown;
305 devpriv->ao_range_type_list[1] =
306 (it->options[7] < ARRAY_SIZE(rti800_ao_ranges))
307 ? rti800_ao_ranges[it->options[7]]
308 : &range_unknown;
309 s->insn_write = rti800_ao_insn_write;
310
311 ret = comedi_alloc_subdev_readback(s);
312 if (ret)
313 return ret;
314 } else {
315 s->type = COMEDI_SUBD_UNUSED;
316 }
317
318 s = &dev->subdevices[2];
319
320 s->type = COMEDI_SUBD_DI;
321 s->subdev_flags = SDF_READABLE;
322 s->n_chan = 8;
323 s->insn_bits = rti800_di_insn_bits;
324 s->maxdata = 1;
325 s->range_table = &range_digital;
326
327 s = &dev->subdevices[3];
328
329 s->type = COMEDI_SUBD_DO;
330 s->subdev_flags = SDF_WRITABLE;
331 s->n_chan = 8;
332 s->insn_bits = rti800_do_insn_bits;
333 s->maxdata = 1;
334 s->range_table = &range_digital;
335
336
337
338
339
340
341 return 0;
342}
343
344static struct comedi_driver rti800_driver = {
345 .driver_name = "rti800",
346 .module = THIS_MODULE,
347 .attach = rti800_attach,
348 .detach = comedi_legacy_detach,
349 .num_names = ARRAY_SIZE(rti800_boardtypes),
350 .board_name = &rti800_boardtypes[0].name,
351 .offset = sizeof(struct rti800_board),
352};
353module_comedi_driver(rti800_driver);
354
355MODULE_DESCRIPTION("Comedi: RTI-800 Multifunction Analog/Digital board");
356MODULE_AUTHOR("Comedi https://www.comedi.org");
357MODULE_LICENSE("GPL");
358
