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