1 // SPDX-License-Identifier: GPL-2.0+
3 * comedi/drivers/rti800.c
4 * Hardware driver for Analog Devices RTI-800/815 board
6 * COMEDI - Linux Control and Measurement Device Interface
7 * Copyright (C) 1998 David A. Schleef <ds@schleef.org>
12 * Description: Analog Devices RTI-800/815
13 * Devices: [Analog Devices] RTI-800 (rti800), RTI-815 (rti815)
14 * Author: David A. Schleef <ds@schleef.org>
16 * Updated: Fri, 05 Sep 2008 14:50:44 +0100
18 * Configuration options:
19 * [0] - I/O port base address
20 * [1] - IRQ (not supported / unused)
21 * [2] - A/D mux/reference (number of channels)
23 * 1 = pseudodifferential (common)
30 * 0 = two's complement
35 * [6] - DAC 0 encoding
36 * 0 = two's complement
38 * [7] - DAC 1 range (same as DAC 0)
39 * [8] - DAC 1 encoding (same as DAC 0)
42 #include <linux/module.h>
43 #include <linux/delay.h>
44 #include <linux/interrupt.h>
45 #include <linux/comedi/comedidev.h>
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
74 static const struct comedi_lrange range_rti800_ai_10_bipolar = {
83 static const struct comedi_lrange range_rti800_ai_5_bipolar = {
92 static const struct comedi_lrange range_rti800_ai_unipolar = {
101 static 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,
107 static const struct comedi_lrange *const rti800_ao_ranges[] = {
112 struct rti800_board {
117 static const struct rti800_board rti800_boardtypes[] = {
126 struct rti800_private {
129 const struct comedi_lrange *ao_range_type_list[2];
130 unsigned char muxgain_bits;
133 static int rti800_ai_eoc(struct comedi_device *dev,
134 struct comedi_subdevice *s,
135 struct comedi_insn *insn,
136 unsigned long context)
138 unsigned char status;
140 status = inb(dev->iobase + RTI800_CSR);
141 if (status & RTI800_CSR_OVERRUN) {
142 outb(0, dev->iobase + RTI800_CLRFLAGS);
145 if (status & RTI800_CSR_DONE)
150 static int rti800_ai_insn_read(struct comedi_device *dev,
151 struct comedi_subdevice *s,
152 struct comedi_insn *insn,
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;
162 inb(dev->iobase + RTI800_ADCHI);
163 outb(0, dev->iobase + RTI800_CLRFLAGS);
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);
170 * Without a delay here, the RTI_CSR_OVERRUN bit
171 * gets set, and you will have an error.
174 int delay = (gain == 0) ? 10 :
176 (gain == 2) ? 40 : 80;
182 for (i = 0; i < insn->n; i++) {
185 outb(0, dev->iobase + RTI800_CONVERT);
187 ret = comedi_timeout(dev, s, insn, rti800_ai_eoc, 0);
191 val = inb(dev->iobase + RTI800_ADCLO);
192 val |= (inb(dev->iobase + RTI800_ADCHI) & 0xf) << 8;
194 if (devpriv->adc_2comp)
195 val = comedi_offset_munge(s, val);
203 static int rti800_ao_insn_write(struct comedi_device *dev,
204 struct comedi_subdevice *s,
205 struct comedi_insn *insn,
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;
214 for (i = 0; i < insn->n; i++) {
215 unsigned int val = data[i];
217 s->readback[chan] = val;
219 if (devpriv->dac_2comp[chan])
220 val = comedi_offset_munge(s, val);
222 outb(val & 0xff, dev->iobase + reg_lo);
223 outb((val >> 8) & 0xff, dev->iobase + reg_hi);
229 static int rti800_di_insn_bits(struct comedi_device *dev,
230 struct comedi_subdevice *s,
231 struct comedi_insn *insn,
234 data[1] = inb(dev->iobase + RTI800_DI);
238 static int rti800_do_insn_bits(struct comedi_device *dev,
239 struct comedi_subdevice *s,
240 struct comedi_insn *insn,
243 if (comedi_dio_update_state(s, data)) {
244 /* Outputs are inverted... */
245 outb(s->state ^ 0xff, dev->iobase + RTI800_DO);
253 static int rti800_attach(struct comedi_device *dev, struct comedi_devconfig *it)
255 const struct rti800_board *board = dev->board_ptr;
256 struct rti800_private *devpriv;
257 struct comedi_subdevice *s;
260 ret = comedi_request_region(dev, it->options[0], 0x10);
264 outb(0, dev->iobase + RTI800_CSR);
265 inb(dev->iobase + RTI800_ADCHI);
266 outb(0, dev->iobase + RTI800_CLRFLAGS);
268 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
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 /* invalid, forces the MUXGAIN register to be set when first used */
276 devpriv->muxgain_bits = 0xff;
278 ret = comedi_alloc_subdevices(dev, 4);
282 s = &dev->subdevices[0];
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;
289 s->range_table = (it->options[3] < ARRAY_SIZE(rti800_ai_ranges))
290 ? rti800_ai_ranges[it->options[3]]
293 s = &dev->subdevices[1];
295 /* ao subdevice (only on rti815) */
296 s->type = COMEDI_SUBD_AO;
297 s->subdev_flags = SDF_WRITABLE;
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]]
305 devpriv->ao_range_type_list[1] =
306 (it->options[7] < ARRAY_SIZE(rti800_ao_ranges))
307 ? rti800_ao_ranges[it->options[7]]
309 s->insn_write = rti800_ao_insn_write;
311 ret = comedi_alloc_subdev_readback(s);
315 s->type = COMEDI_SUBD_UNUSED;
318 s = &dev->subdevices[2];
320 s->type = COMEDI_SUBD_DI;
321 s->subdev_flags = SDF_READABLE;
323 s->insn_bits = rti800_di_insn_bits;
325 s->range_table = &range_digital;
327 s = &dev->subdevices[3];
329 s->type = COMEDI_SUBD_DO;
330 s->subdev_flags = SDF_WRITABLE;
332 s->insn_bits = rti800_do_insn_bits;
334 s->range_table = &range_digital;
337 * There is also an Am9513 timer on these boards. This subdevice
338 * is not currently supported.
344 static 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),
353 module_comedi_driver(rti800_driver);
355 MODULE_DESCRIPTION("Comedi: RTI-800 Multifunction Analog/Digital board");
356 MODULE_AUTHOR("Comedi https://www.comedi.org");
357 MODULE_LICENSE("GPL");