1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * cb_das16_cs.c
4 * Driver for Computer Boards PC-CARD DAS16/16.
5 *
6 * COMEDI - Linux Control and Measurement Device Interface
7 * Copyright (C) 2000, 2001, 2002 David A. Schleef <ds@schleef.org>
8 *
9 * PCMCIA support code for this driver is adapted from the dummy_cs.c
10 * driver of the Linux PCMCIA Card Services package.
11 *
12 * The initial developer of the original code is David A. Hinds
13 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
14 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
15 */
16
17 /*
18 * Driver: cb_das16_cs
19 * Description: Computer Boards PC-CARD DAS16/16
20 * Devices: [ComputerBoards] PC-CARD DAS16/16 (cb_das16_cs),
21 * PC-CARD DAS16/16-AO
22 * Author: ds
23 * Updated: Mon, 04 Nov 2002 20:04:21 -0800
24 * Status: experimental
25 */
26
27 #include <linux/module.h>
28 #include <linux/interrupt.h>
29 #include <linux/delay.h>
30
31 #include "../comedi_pcmcia.h"
32
33 #include "comedi_8254.h"
34
35 /*
36 * Register I/O map
37 */
38 #define DAS16CS_AI_DATA_REG 0x00
39 #define DAS16CS_AI_MUX_REG 0x02
40 #define DAS16CS_AI_MUX_HI_CHAN(x) (((x) & 0xf) << 4)
41 #define DAS16CS_AI_MUX_LO_CHAN(x) (((x) & 0xf) << 0)
42 #define DAS16CS_AI_MUX_SINGLE_CHAN(x) (DAS16CS_AI_MUX_HI_CHAN(x) | \
43 DAS16CS_AI_MUX_LO_CHAN(x))
44 #define DAS16CS_MISC1_REG 0x04
45 #define DAS16CS_MISC1_INTE BIT(15) /* 1=enable; 0=disable */
46 #define DAS16CS_MISC1_INT_SRC(x) (((x) & 0x7) << 12) /* interrupt src */
47 #define DAS16CS_MISC1_INT_SRC_NONE DAS16CS_MISC1_INT_SRC(0)
48 #define DAS16CS_MISC1_INT_SRC_PACER DAS16CS_MISC1_INT_SRC(1)
49 #define DAS16CS_MISC1_INT_SRC_EXT DAS16CS_MISC1_INT_SRC(2)
50 #define DAS16CS_MISC1_INT_SRC_FNE DAS16CS_MISC1_INT_SRC(3)
51 #define DAS16CS_MISC1_INT_SRC_FHF DAS16CS_MISC1_INT_SRC(4)
52 #define DAS16CS_MISC1_INT_SRC_EOS DAS16CS_MISC1_INT_SRC(5)
53 #define DAS16CS_MISC1_INT_SRC_MASK DAS16CS_MISC1_INT_SRC(7)
54 #define DAS16CS_MISC1_OVR BIT(10) /* ro - 1=FIFO overflow */
55 #define DAS16CS_MISC1_AI_CONV(x) (((x) & 0x3) << 8) /* AI convert src */
56 #define DAS16CS_MISC1_AI_CONV_SW DAS16CS_MISC1_AI_CONV(0)
57 #define DAS16CS_MISC1_AI_CONV_EXT_NEG DAS16CS_MISC1_AI_CONV(1)
58 #define DAS16CS_MISC1_AI_CONV_EXT_POS DAS16CS_MISC1_AI_CONV(2)
59 #define DAS16CS_MISC1_AI_CONV_PACER DAS16CS_MISC1_AI_CONV(3)
60 #define DAS16CS_MISC1_AI_CONV_MASK DAS16CS_MISC1_AI_CONV(3)
61 #define DAS16CS_MISC1_EOC BIT(7) /* ro - 0=busy; 1=ready */
62 #define DAS16CS_MISC1_SEDIFF BIT(5) /* 0=diff; 1=se */
63 #define DAS16CS_MISC1_INTB BIT(4) /* ro - 0=latched; 1=cleared */
64 #define DAS16CS_MISC1_MA_MASK (0xf << 0) /* ro - current ai mux */
65 #define DAS16CS_MISC1_DAC1CS BIT(3) /* wo - DAC1 chip select */
66 #define DAS16CS_MISC1_DACCLK BIT(2) /* wo - Serial DAC clock */
67 #define DAS16CS_MISC1_DACSD BIT(1) /* wo - Serial DAC data */
68 #define DAS16CS_MISC1_DAC0CS BIT(0) /* wo - DAC0 chip select */
69 #define DAS16CS_MISC1_DAC_MASK (0x0f << 0)
70 #define DAS16CS_MISC2_REG 0x06
71 #define DAS16CS_MISC2_BME BIT(14) /* 1=burst enable; 0=disable */
72 #define DAS16CS_MISC2_AI_GAIN(x) (((x) & 0xf) << 8) /* AI gain */
73 #define DAS16CS_MISC2_AI_GAIN_1 DAS16CS_MISC2_AI_GAIN(4) /* +/-10V */
74 #define DAS16CS_MISC2_AI_GAIN_2 DAS16CS_MISC2_AI_GAIN(0) /* +/-5V */
75 #define DAS16CS_MISC2_AI_GAIN_4 DAS16CS_MISC2_AI_GAIN(1) /* +/-2.5V */
76 #define DAS16CS_MISC2_AI_GAIN_8 DAS16CS_MISC2_AI_GAIN(2) /* +-1.25V */
77 #define DAS16CS_MISC2_AI_GAIN_MASK DAS16CS_MISC2_AI_GAIN(0xf)
78 #define DAS16CS_MISC2_UDIR BIT(7) /* 1=dio7:4 output; 0=input */
79 #define DAS16CS_MISC2_LDIR BIT(6) /* 1=dio3:0 output; 0=input */
80 #define DAS16CS_MISC2_TRGPOL BIT(5) /* 1=active lo; 0=hi */
81 #define DAS16CS_MISC2_TRGSEL BIT(4) /* 1=edge; 0=level */
82 #define DAS16CS_MISC2_FFNE BIT(3) /* ro - 1=FIFO not empty */
83 #define DAS16CS_MISC2_TRGCLR BIT(3) /* wo - 1=clr (monstable) */
84 #define DAS16CS_MISC2_CLK2 BIT(2) /* 1=10 MHz; 0=1 MHz */
85 #define DAS16CS_MISC2_CTR1 BIT(1) /* 1=int. 100 kHz; 0=ext. clk */
86 #define DAS16CS_MISC2_TRG0 BIT(0) /* 1=enable; 0=disable */
87 #define DAS16CS_TIMER_BASE 0x08
88 #define DAS16CS_DIO_REG 0x10
89
90 struct das16cs_board {
91 const char *name;
92 int device_id;
93 unsigned int has_ao:1;
94 unsigned int has_4dio:1;
95 };
96
97 static const struct das16cs_board das16cs_boards[] = {
98 {
99 .name = "PC-CARD DAS16/16-AO",
100 .device_id = 0x0039,
101 .has_ao = 1,
102 .has_4dio = 1,
103 }, {
104 .name = "PCM-DAS16s/16",
105 .device_id = 0x4009,
106 }, {
107 .name = "PC-CARD DAS16/16",
108 .device_id = 0x0000, /* unknown */
109 },
110 };
111
112 struct das16cs_private {
113 unsigned short misc1;
114 unsigned short misc2;
115 };
116
117 static const struct comedi_lrange das16cs_ai_range = {
118 4, {
119 BIP_RANGE(10),
120 BIP_RANGE(5),
121 BIP_RANGE(2.5),
122 BIP_RANGE(1.25),
123 }
124 };
125
das16cs_ai_eoc(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned long context)126 static int das16cs_ai_eoc(struct comedi_device *dev,
127 struct comedi_subdevice *s,
128 struct comedi_insn *insn,
129 unsigned long context)
130 {
131 unsigned int status;
132
133 status = inw(dev->iobase + DAS16CS_MISC1_REG);
134 if (status & DAS16CS_MISC1_EOC)
135 return 0;
136 return -EBUSY;
137 }
138
das16cs_ai_insn_read(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned int * data)139 static int das16cs_ai_insn_read(struct comedi_device *dev,
140 struct comedi_subdevice *s,
141 struct comedi_insn *insn,
142 unsigned int *data)
143 {
144 struct das16cs_private *devpriv = dev->private;
145 int chan = CR_CHAN(insn->chanspec);
146 int range = CR_RANGE(insn->chanspec);
147 int aref = CR_AREF(insn->chanspec);
148 int ret;
149 int i;
150
151 outw(DAS16CS_AI_MUX_SINGLE_CHAN(chan),
152 dev->iobase + DAS16CS_AI_MUX_REG);
153
154 /* disable interrupts, software convert */
155 devpriv->misc1 &= ~(DAS16CS_MISC1_INTE | DAS16CS_MISC1_INT_SRC_MASK |
156 DAS16CS_MISC1_AI_CONV_MASK);
157 if (aref == AREF_DIFF)
158 devpriv->misc1 &= ~DAS16CS_MISC1_SEDIFF;
159 else
160 devpriv->misc1 |= DAS16CS_MISC1_SEDIFF;
161 outw(devpriv->misc1, dev->iobase + DAS16CS_MISC1_REG);
162
163 devpriv->misc2 &= ~(DAS16CS_MISC2_BME | DAS16CS_MISC2_AI_GAIN_MASK);
164 switch (range) {
165 case 0:
166 devpriv->misc2 |= DAS16CS_MISC2_AI_GAIN_1;
167 break;
168 case 1:
169 devpriv->misc2 |= DAS16CS_MISC2_AI_GAIN_2;
170 break;
171 case 2:
172 devpriv->misc2 |= DAS16CS_MISC2_AI_GAIN_4;
173 break;
174 case 3:
175 devpriv->misc2 |= DAS16CS_MISC2_AI_GAIN_8;
176 break;
177 }
178 outw(devpriv->misc2, dev->iobase + DAS16CS_MISC2_REG);
179
180 for (i = 0; i < insn->n; i++) {
181 outw(0, dev->iobase + DAS16CS_AI_DATA_REG);
182
183 ret = comedi_timeout(dev, s, insn, das16cs_ai_eoc, 0);
184 if (ret)
185 return ret;
186
187 data[i] = inw(dev->iobase + DAS16CS_AI_DATA_REG);
188 }
189
190 return i;
191 }
192
das16cs_ao_insn_write(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned int * data)193 static int das16cs_ao_insn_write(struct comedi_device *dev,
194 struct comedi_subdevice *s,
195 struct comedi_insn *insn,
196 unsigned int *data)
197 {
198 struct das16cs_private *devpriv = dev->private;
199 unsigned int chan = CR_CHAN(insn->chanspec);
200 unsigned int val = s->readback[chan];
201 unsigned short misc1;
202 int bit;
203 int i;
204
205 for (i = 0; i < insn->n; i++) {
206 val = data[i];
207
208 outw(devpriv->misc1, dev->iobase + DAS16CS_MISC1_REG);
209 udelay(1);
210
211 /* raise the DACxCS line for the non-selected channel */
212 misc1 = devpriv->misc1 & ~DAS16CS_MISC1_DAC_MASK;
213 if (chan)
214 misc1 |= DAS16CS_MISC1_DAC0CS;
215 else
216 misc1 |= DAS16CS_MISC1_DAC1CS;
217
218 outw(misc1, dev->iobase + DAS16CS_MISC1_REG);
219 udelay(1);
220
221 for (bit = 15; bit >= 0; bit--) {
222 if ((val >> bit) & 0x1)
223 misc1 |= DAS16CS_MISC1_DACSD;
224 else
225 misc1 &= ~DAS16CS_MISC1_DACSD;
226 outw(misc1, dev->iobase + DAS16CS_MISC1_REG);
227 udelay(1);
228 outw(misc1 | DAS16CS_MISC1_DACCLK,
229 dev->iobase + DAS16CS_MISC1_REG);
230 udelay(1);
231 }
232 /*
233 * Make both DAC0CS and DAC1CS high to load
234 * the new data and update analog the output
235 */
236 outw(misc1 | DAS16CS_MISC1_DAC0CS | DAS16CS_MISC1_DAC1CS,
237 dev->iobase + DAS16CS_MISC1_REG);
238 }
239 s->readback[chan] = val;
240
241 return insn->n;
242 }
243
das16cs_dio_insn_bits(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned int * data)244 static int das16cs_dio_insn_bits(struct comedi_device *dev,
245 struct comedi_subdevice *s,
246 struct comedi_insn *insn,
247 unsigned int *data)
248 {
249 if (comedi_dio_update_state(s, data))
250 outw(s->state, dev->iobase + DAS16CS_DIO_REG);
251
252 data[1] = inw(dev->iobase + DAS16CS_DIO_REG);
253
254 return insn->n;
255 }
256
das16cs_dio_insn_config(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned int * data)257 static int das16cs_dio_insn_config(struct comedi_device *dev,
258 struct comedi_subdevice *s,
259 struct comedi_insn *insn,
260 unsigned int *data)
261 {
262 struct das16cs_private *devpriv = dev->private;
263 unsigned int chan = CR_CHAN(insn->chanspec);
264 unsigned int mask;
265 int ret;
266
267 if (chan < 4)
268 mask = 0x0f;
269 else
270 mask = 0xf0;
271
272 ret = comedi_dio_insn_config(dev, s, insn, data, mask);
273 if (ret)
274 return ret;
275
276 if (s->io_bits & 0xf0)
277 devpriv->misc2 |= DAS16CS_MISC2_UDIR;
278 else
279 devpriv->misc2 &= ~DAS16CS_MISC2_UDIR;
280 if (s->io_bits & 0x0f)
281 devpriv->misc2 |= DAS16CS_MISC2_LDIR;
282 else
283 devpriv->misc2 &= ~DAS16CS_MISC2_LDIR;
284 outw(devpriv->misc2, dev->iobase + DAS16CS_MISC2_REG);
285
286 return insn->n;
287 }
288
das16cs_counter_insn_config(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned int * data)289 static int das16cs_counter_insn_config(struct comedi_device *dev,
290 struct comedi_subdevice *s,
291 struct comedi_insn *insn,
292 unsigned int *data)
293 {
294 struct das16cs_private *devpriv = dev->private;
295
296 switch (data[0]) {
297 case INSN_CONFIG_SET_CLOCK_SRC:
298 switch (data[1]) {
299 case 0: /* internal 100 kHz */
300 devpriv->misc2 |= DAS16CS_MISC2_CTR1;
301 break;
302 case 1: /* external */
303 devpriv->misc2 &= ~DAS16CS_MISC2_CTR1;
304 break;
305 default:
306 return -EINVAL;
307 }
308 outw(devpriv->misc2, dev->iobase + DAS16CS_MISC2_REG);
309 break;
310 case INSN_CONFIG_GET_CLOCK_SRC:
311 if (devpriv->misc2 & DAS16CS_MISC2_CTR1) {
312 data[1] = 0;
313 data[2] = I8254_OSC_BASE_100KHZ;
314 } else {
315 data[1] = 1;
316 data[2] = 0; /* unknown */
317 }
318 break;
319 default:
320 return -EINVAL;
321 }
322
323 return insn->n;
324 }
325
das16cs_find_boardinfo(struct comedi_device * dev,struct pcmcia_device * link)326 static const void *das16cs_find_boardinfo(struct comedi_device *dev,
327 struct pcmcia_device *link)
328 {
329 const struct das16cs_board *board;
330 int i;
331
332 for (i = 0; i < ARRAY_SIZE(das16cs_boards); i++) {
333 board = &das16cs_boards[i];
334 if (board->device_id == link->card_id)
335 return board;
336 }
337
338 return NULL;
339 }
340
das16cs_auto_attach(struct comedi_device * dev,unsigned long context)341 static int das16cs_auto_attach(struct comedi_device *dev,
342 unsigned long context)
343 {
344 struct pcmcia_device *link = comedi_to_pcmcia_dev(dev);
345 const struct das16cs_board *board;
346 struct das16cs_private *devpriv;
347 struct comedi_subdevice *s;
348 int ret;
349
350 board = das16cs_find_boardinfo(dev, link);
351 if (!board)
352 return -ENODEV;
353 dev->board_ptr = board;
354 dev->board_name = board->name;
355
356 link->config_flags |= CONF_AUTO_SET_IO | CONF_ENABLE_IRQ;
357 ret = comedi_pcmcia_enable(dev, NULL);
358 if (ret)
359 return ret;
360 dev->iobase = link->resource[0]->start;
361
362 link->priv = dev;
363
364 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
365 if (!devpriv)
366 return -ENOMEM;
367
368 dev->pacer = comedi_8254_init(dev->iobase + DAS16CS_TIMER_BASE,
369 I8254_OSC_BASE_10MHZ, I8254_IO16, 0);
370 if (!dev->pacer)
371 return -ENOMEM;
372
373 ret = comedi_alloc_subdevices(dev, 4);
374 if (ret)
375 return ret;
376
377 /* Analog Input subdevice */
378 s = &dev->subdevices[0];
379 s->type = COMEDI_SUBD_AI;
380 s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF;
381 s->n_chan = 16;
382 s->maxdata = 0xffff;
383 s->range_table = &das16cs_ai_range;
384 s->insn_read = das16cs_ai_insn_read;
385
386 /* Analog Output subdevice */
387 s = &dev->subdevices[1];
388 if (board->has_ao) {
389 s->type = COMEDI_SUBD_AO;
390 s->subdev_flags = SDF_WRITABLE;
391 s->n_chan = 2;
392 s->maxdata = 0xffff;
393 s->range_table = &range_bipolar10;
394 s->insn_write = &das16cs_ao_insn_write;
395
396 ret = comedi_alloc_subdev_readback(s);
397 if (ret)
398 return ret;
399 } else {
400 s->type = COMEDI_SUBD_UNUSED;
401 }
402
403 /* Digital I/O subdevice */
404 s = &dev->subdevices[2];
405 s->type = COMEDI_SUBD_DIO;
406 s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
407 s->n_chan = board->has_4dio ? 4 : 8;
408 s->maxdata = 1;
409 s->range_table = &range_digital;
410 s->insn_bits = das16cs_dio_insn_bits;
411 s->insn_config = das16cs_dio_insn_config;
412
413 /* Counter subdevice (8254) */
414 s = &dev->subdevices[3];
415 comedi_8254_subdevice_init(s, dev->pacer);
416
417 dev->pacer->insn_config = das16cs_counter_insn_config;
418
419 /* counters 1 and 2 are used internally for the pacer */
420 comedi_8254_set_busy(dev->pacer, 1, true);
421 comedi_8254_set_busy(dev->pacer, 2, true);
422
423 return 0;
424 }
425
426 static struct comedi_driver driver_das16cs = {
427 .driver_name = "cb_das16_cs",
428 .module = THIS_MODULE,
429 .auto_attach = das16cs_auto_attach,
430 .detach = comedi_pcmcia_disable,
431 };
432
das16cs_pcmcia_attach(struct pcmcia_device * link)433 static int das16cs_pcmcia_attach(struct pcmcia_device *link)
434 {
435 return comedi_pcmcia_auto_config(link, &driver_das16cs);
436 }
437
438 static const struct pcmcia_device_id das16cs_id_table[] = {
439 PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x0039),
440 PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4009),
441 PCMCIA_DEVICE_NULL
442 };
443 MODULE_DEVICE_TABLE(pcmcia, das16cs_id_table);
444
445 static struct pcmcia_driver das16cs_driver = {
446 .name = "cb_das16_cs",
447 .owner = THIS_MODULE,
448 .id_table = das16cs_id_table,
449 .probe = das16cs_pcmcia_attach,
450 .remove = comedi_pcmcia_auto_unconfig,
451 };
452 module_comedi_pcmcia_driver(driver_das16cs, das16cs_driver);
453
454 MODULE_AUTHOR("David A. Schleef <ds@schleef.org>");
455 MODULE_DESCRIPTION("Comedi driver for Computer Boards PC-CARD DAS16/16");
456 MODULE_LICENSE("GPL");
457