1 // SPDX-License-Identifier: GPL-2.0+
4 * Comedi driver for Inova ICP_MULTI board
6 * COMEDI - Linux Control and Measurement Device Interface
7 * Copyright (C) 1997-2002 David A. Schleef <ds@schleef.org>
12 * Description: Inova ICP_MULTI
13 * Devices: [Inova] ICP_MULTI (icp_multi)
14 * Author: Anne Smorthit <anne.smorthit@sfwte.ch>
17 * Configuration options: not applicable, uses PCI auto config
19 * The driver works for analog input and output and digital input and
20 * output. It does not work with interrupts or with the counters. Currently
23 * It has 16 single-ended or 8 differential Analogue Input channels with
24 * 12-bit resolution. Ranges : 5V, 10V, +/-5V, +/-10V, 0..20mA and 4..20mA.
25 * Input ranges can be individually programmed for each channel. Voltage or
26 * current measurement is selected by jumper.
28 * There are 4 x 12-bit Analogue Outputs. Ranges : 5V, 10V, +/-5V, +/-10V
30 * 16 x Digital Inputs, 24V
32 * 8 x Digital Outputs, 24V, 1A
34 * 4 x 16-bit counters - not implemented
37 #include <linux/module.h>
38 #include <linux/delay.h>
40 #include "../comedi_pci.h"
42 #define ICP_MULTI_ADC_CSR 0x00 /* R/W: ADC command/status register */
43 #define ICP_MULTI_ADC_CSR_ST BIT(0) /* Start ADC */
44 #define ICP_MULTI_ADC_CSR_BSY BIT(0) /* ADC busy */
45 #define ICP_MULTI_ADC_CSR_BI BIT(4) /* Bipolar input range */
46 #define ICP_MULTI_ADC_CSR_RA BIT(5) /* Input range 0 = 5V, 1 = 10V */
47 #define ICP_MULTI_ADC_CSR_DI BIT(6) /* Input mode 1 = differential */
48 #define ICP_MULTI_ADC_CSR_DI_CHAN(x) (((x) & 0x7) << 9)
49 #define ICP_MULTI_ADC_CSR_SE_CHAN(x) (((x) & 0xf) << 8)
50 #define ICP_MULTI_AI 2 /* R: Analogue input data */
51 #define ICP_MULTI_DAC_CSR 0x04 /* R/W: DAC command/status register */
52 #define ICP_MULTI_DAC_CSR_ST BIT(0) /* Start DAC */
53 #define ICP_MULTI_DAC_CSR_BSY BIT(0) /* DAC busy */
54 #define ICP_MULTI_DAC_CSR_BI BIT(4) /* Bipolar output range */
55 #define ICP_MULTI_DAC_CSR_RA BIT(5) /* Output range 0 = 5V, 1 = 10V */
56 #define ICP_MULTI_DAC_CSR_CHAN(x) (((x) & 0x3) << 8)
57 #define ICP_MULTI_AO 6 /* R/W: Analogue output data */
58 #define ICP_MULTI_DI 8 /* R/W: Digital inputs */
59 #define ICP_MULTI_DO 0x0A /* R/W: Digital outputs */
60 #define ICP_MULTI_INT_EN 0x0c /* R/W: Interrupt enable register */
61 #define ICP_MULTI_INT_STAT 0x0e /* R/W: Interrupt status register */
62 #define ICP_MULTI_INT_ADC_RDY BIT(0) /* A/D conversion ready interrupt */
63 #define ICP_MULTI_INT_DAC_RDY BIT(1) /* D/A conversion ready interrupt */
64 #define ICP_MULTI_INT_DOUT_ERR BIT(2) /* Digital output error interrupt */
65 #define ICP_MULTI_INT_DIN_STAT BIT(3) /* Digital input status change int. */
66 #define ICP_MULTI_INT_CIE0 BIT(4) /* Counter 0 overrun interrupt */
67 #define ICP_MULTI_INT_CIE1 BIT(5) /* Counter 1 overrun interrupt */
68 #define ICP_MULTI_INT_CIE2 BIT(6) /* Counter 2 overrun interrupt */
69 #define ICP_MULTI_INT_CIE3 BIT(7) /* Counter 3 overrun interrupt */
70 #define ICP_MULTI_INT_MASK 0xff /* All interrupts */
71 #define ICP_MULTI_CNTR0 0x10 /* R/W: Counter 0 */
72 #define ICP_MULTI_CNTR1 0x12 /* R/W: counter 1 */
73 #define ICP_MULTI_CNTR2 0x14 /* R/W: Counter 2 */
74 #define ICP_MULTI_CNTR3 0x16 /* R/W: Counter 3 */
76 /* analog input and output have the same range options */
77 static const struct comedi_lrange icp_multi_ranges = {
86 static const char range_codes_analog[] = { 0x00, 0x20, 0x10, 0x30 };
88 static int icp_multi_ai_eoc(struct comedi_device *dev,
89 struct comedi_subdevice *s,
90 struct comedi_insn *insn,
91 unsigned long context)
95 status = readw(dev->mmio + ICP_MULTI_ADC_CSR);
96 if ((status & ICP_MULTI_ADC_CSR_BSY) == 0)
101 static int icp_multi_ai_insn_read(struct comedi_device *dev,
102 struct comedi_subdevice *s,
103 struct comedi_insn *insn,
106 unsigned int chan = CR_CHAN(insn->chanspec);
107 unsigned int range = CR_RANGE(insn->chanspec);
108 unsigned int aref = CR_AREF(insn->chanspec);
109 unsigned int adc_csr;
113 /* Set mode and range data for specified channel */
114 if (aref == AREF_DIFF) {
115 adc_csr = ICP_MULTI_ADC_CSR_DI_CHAN(chan) |
116 ICP_MULTI_ADC_CSR_DI;
118 adc_csr = ICP_MULTI_ADC_CSR_SE_CHAN(chan);
120 adc_csr |= range_codes_analog[range];
121 writew(adc_csr, dev->mmio + ICP_MULTI_ADC_CSR);
123 for (n = 0; n < insn->n; n++) {
124 /* Set start ADC bit */
125 writew(adc_csr | ICP_MULTI_ADC_CSR_ST,
126 dev->mmio + ICP_MULTI_ADC_CSR);
130 /* Wait for conversion to complete, or get fed up waiting */
131 ret = comedi_timeout(dev, s, insn, icp_multi_ai_eoc, 0);
135 data[n] = (readw(dev->mmio + ICP_MULTI_AI) >> 4) & 0x0fff;
138 return ret ? ret : n;
141 static int icp_multi_ao_ready(struct comedi_device *dev,
142 struct comedi_subdevice *s,
143 struct comedi_insn *insn,
144 unsigned long context)
148 status = readw(dev->mmio + ICP_MULTI_DAC_CSR);
149 if ((status & ICP_MULTI_DAC_CSR_BSY) == 0)
154 static int icp_multi_ao_insn_write(struct comedi_device *dev,
155 struct comedi_subdevice *s,
156 struct comedi_insn *insn,
159 unsigned int chan = CR_CHAN(insn->chanspec);
160 unsigned int range = CR_RANGE(insn->chanspec);
161 unsigned int dac_csr;
164 /* Select channel and range */
165 dac_csr = ICP_MULTI_DAC_CSR_CHAN(chan);
166 dac_csr |= range_codes_analog[range];
167 writew(dac_csr, dev->mmio + ICP_MULTI_DAC_CSR);
169 for (i = 0; i < insn->n; i++) {
170 unsigned int val = data[i];
173 /* Wait for analog output to be ready for new data */
174 ret = comedi_timeout(dev, s, insn, icp_multi_ao_ready, 0);
178 writew(val, dev->mmio + ICP_MULTI_AO);
180 /* Set start conversion bit to write data to channel */
181 writew(dac_csr | ICP_MULTI_DAC_CSR_ST,
182 dev->mmio + ICP_MULTI_DAC_CSR);
184 s->readback[chan] = val;
190 static int icp_multi_di_insn_bits(struct comedi_device *dev,
191 struct comedi_subdevice *s,
192 struct comedi_insn *insn,
195 data[1] = readw(dev->mmio + ICP_MULTI_DI);
200 static int icp_multi_do_insn_bits(struct comedi_device *dev,
201 struct comedi_subdevice *s,
202 struct comedi_insn *insn,
205 if (comedi_dio_update_state(s, data))
206 writew(s->state, dev->mmio + ICP_MULTI_DO);
213 static int icp_multi_reset(struct comedi_device *dev)
217 /* Disable all interrupts and clear any requests */
218 writew(0, dev->mmio + ICP_MULTI_INT_EN);
219 writew(ICP_MULTI_INT_MASK, dev->mmio + ICP_MULTI_INT_STAT);
221 /* Reset the analog output channels to 0V */
222 for (i = 0; i < 4; i++) {
223 unsigned int dac_csr = ICP_MULTI_DAC_CSR_CHAN(i);
225 /* Select channel and 0..5V range */
226 writew(dac_csr, dev->mmio + ICP_MULTI_DAC_CSR);
229 writew(0, dev->mmio + ICP_MULTI_AO);
231 /* Set start conversion bit to write data to channel */
232 writew(dac_csr | ICP_MULTI_DAC_CSR_ST,
233 dev->mmio + ICP_MULTI_DAC_CSR);
237 /* Digital outputs to 0 */
238 writew(0, dev->mmio + ICP_MULTI_DO);
243 static int icp_multi_auto_attach(struct comedi_device *dev,
244 unsigned long context_unused)
246 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
247 struct comedi_subdevice *s;
250 ret = comedi_pci_enable(dev);
254 dev->mmio = pci_ioremap_bar(pcidev, 2);
258 ret = comedi_alloc_subdevices(dev, 4);
262 icp_multi_reset(dev);
264 /* Analog Input subdevice */
265 s = &dev->subdevices[0];
266 s->type = COMEDI_SUBD_AI;
267 s->subdev_flags = SDF_READABLE | SDF_COMMON | SDF_GROUND | SDF_DIFF;
270 s->range_table = &icp_multi_ranges;
271 s->insn_read = icp_multi_ai_insn_read;
273 /* Analog Output subdevice */
274 s = &dev->subdevices[1];
275 s->type = COMEDI_SUBD_AO;
276 s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_COMMON;
279 s->range_table = &icp_multi_ranges;
280 s->insn_write = icp_multi_ao_insn_write;
282 ret = comedi_alloc_subdev_readback(s);
286 /* Digital Input subdevice */
287 s = &dev->subdevices[2];
288 s->type = COMEDI_SUBD_DI;
289 s->subdev_flags = SDF_READABLE;
292 s->range_table = &range_digital;
293 s->insn_bits = icp_multi_di_insn_bits;
295 /* Digital Output subdevice */
296 s = &dev->subdevices[3];
297 s->type = COMEDI_SUBD_DO;
298 s->subdev_flags = SDF_WRITABLE;
301 s->range_table = &range_digital;
302 s->insn_bits = icp_multi_do_insn_bits;
307 static struct comedi_driver icp_multi_driver = {
308 .driver_name = "icp_multi",
309 .module = THIS_MODULE,
310 .auto_attach = icp_multi_auto_attach,
311 .detach = comedi_pci_detach,
314 static int icp_multi_pci_probe(struct pci_dev *dev,
315 const struct pci_device_id *id)
317 return comedi_pci_auto_config(dev, &icp_multi_driver, id->driver_data);
320 static const struct pci_device_id icp_multi_pci_table[] = {
321 { PCI_DEVICE(PCI_VENDOR_ID_ICP, 0x8000) },
324 MODULE_DEVICE_TABLE(pci, icp_multi_pci_table);
326 static struct pci_driver icp_multi_pci_driver = {
328 .id_table = icp_multi_pci_table,
329 .probe = icp_multi_pci_probe,
330 .remove = comedi_pci_auto_unconfig,
332 module_comedi_pci_driver(icp_multi_driver, icp_multi_pci_driver);
334 MODULE_AUTHOR("Comedi https://www.comedi.org");
335 MODULE_DESCRIPTION("Comedi driver for Inova ICP_MULTI board");
336 MODULE_LICENSE("GPL");