1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * comedi/drivers/pcl730.c
4 * Driver for Advantech PCL-730 and clones
5 * José Luis Sánchez
6 */
7
8 /*
9 * Driver: pcl730
10 * Description: Advantech PCL-730 (& compatibles)
11 * Devices: [Advantech] PCL-730 (pcl730), PCM-3730 (pcm3730), PCL-725 (pcl725),
12 * PCL-733 (pcl733), PCL-734 (pcl734),
13 * [ADLink] ACL-7130 (acl7130), ACL-7225b (acl7225b),
14 * [ICP] ISO-730 (iso730), P8R8-DIO (p8r8dio), P16R16-DIO (p16r16dio),
15 * [Diamond Systems] OPMM-1616-XT (opmm-1616-xt), PEARL-MM-P (pearl-mm-p),
16 * IR104-PBF (ir104-pbf),
17 * Author: José Luis Sánchez (jsanchezv@teleline.es)
18 * Status: untested
19 *
20 * Configuration options:
21 * [0] - I/O port base
22 *
23 * Interrupts are not supported.
24 * The ACL-7130 card has an 8254 timer/counter not supported by this driver.
25 */
26
27 #include <linux/module.h>
28 #include <linux/comedi/comedidev.h>
29
30 /*
31 * Register map
32 *
33 * The register map varies slightly depending on the board type but
34 * all registers are 8-bit.
35 *
36 * The boardinfo 'io_range' is used to allow comedi to request the
37 * proper range required by the board.
38 *
39 * The comedi_subdevice 'private' data is used to pass the register
40 * offset to the (*insn_bits) functions to read/write the correct
41 * registers.
42 *
43 * The basic register mapping looks like this:
44 *
45 * BASE+0 Isolated outputs 0-7 (write) / inputs 0-7 (read)
46 * BASE+1 Isolated outputs 8-15 (write) / inputs 8-15 (read)
47 * BASE+2 TTL outputs 0-7 (write) / inputs 0-7 (read)
48 * BASE+3 TTL outputs 8-15 (write) / inputs 8-15 (read)
49 *
50 * The pcm3730 board does not have register BASE+1.
51 *
52 * The pcl725 and p8r8dio only have registers BASE+0 and BASE+1:
53 *
54 * BASE+0 Isolated outputs 0-7 (write) (read back on p8r8dio)
55 * BASE+1 Isolated inputs 0-7 (read)
56 *
57 * The acl7225b and p16r16dio boards have this register mapping:
58 *
59 * BASE+0 Isolated outputs 0-7 (write) (read back)
60 * BASE+1 Isolated outputs 8-15 (write) (read back)
61 * BASE+2 Isolated inputs 0-7 (read)
62 * BASE+3 Isolated inputs 8-15 (read)
63 *
64 * The pcl733 and pcl733 boards have this register mapping:
65 *
66 * BASE+0 Isolated outputs 0-7 (write) or inputs 0-7 (read)
67 * BASE+1 Isolated outputs 8-15 (write) or inputs 8-15 (read)
68 * BASE+2 Isolated outputs 16-23 (write) or inputs 16-23 (read)
69 * BASE+3 Isolated outputs 24-31 (write) or inputs 24-31 (read)
70 *
71 * The opmm-1616-xt board has this register mapping:
72 *
73 * BASE+0 Isolated outputs 0-7 (write) (read back)
74 * BASE+1 Isolated outputs 8-15 (write) (read back)
75 * BASE+2 Isolated inputs 0-7 (read)
76 * BASE+3 Isolated inputs 8-15 (read)
77 *
78 * These registers are not currently supported:
79 *
80 * BASE+2 Relay select register (write)
81 * BASE+3 Board reset control register (write)
82 * BASE+4 Interrupt control register (write)
83 * BASE+4 Change detect 7-0 status register (read)
84 * BASE+5 LED control register (write)
85 * BASE+5 Change detect 15-8 status register (read)
86 *
87 * The pearl-mm-p board has this register mapping:
88 *
89 * BASE+0 Isolated outputs 0-7 (write)
90 * BASE+1 Isolated outputs 8-15 (write)
91 *
92 * The ir104-pbf board has this register mapping:
93 *
94 * BASE+0 Isolated outputs 0-7 (write) (read back)
95 * BASE+1 Isolated outputs 8-15 (write) (read back)
96 * BASE+2 Isolated outputs 16-19 (write) (read back)
97 * BASE+4 Isolated inputs 0-7 (read)
98 * BASE+5 Isolated inputs 8-15 (read)
99 * BASE+6 Isolated inputs 16-19 (read)
100 */
101
102 struct pcl730_board {
103 const char *name;
104 unsigned int io_range;
105 unsigned is_pcl725:1;
106 unsigned is_acl7225b:1;
107 unsigned is_ir104:1;
108 unsigned has_readback:1;
109 unsigned has_ttl_io:1;
110 int n_subdevs;
111 int n_iso_out_chan;
112 int n_iso_in_chan;
113 int n_ttl_chan;
114 };
115
116 static const struct pcl730_board pcl730_boards[] = {
117 {
118 .name = "pcl730",
119 .io_range = 0x04,
120 .has_ttl_io = 1,
121 .n_subdevs = 4,
122 .n_iso_out_chan = 16,
123 .n_iso_in_chan = 16,
124 .n_ttl_chan = 16,
125 }, {
126 .name = "iso730",
127 .io_range = 0x04,
128 .n_subdevs = 4,
129 .n_iso_out_chan = 16,
130 .n_iso_in_chan = 16,
131 .n_ttl_chan = 16,
132 }, {
133 .name = "acl7130",
134 .io_range = 0x08,
135 .has_ttl_io = 1,
136 .n_subdevs = 4,
137 .n_iso_out_chan = 16,
138 .n_iso_in_chan = 16,
139 .n_ttl_chan = 16,
140 }, {
141 .name = "pcm3730",
142 .io_range = 0x04,
143 .has_ttl_io = 1,
144 .n_subdevs = 4,
145 .n_iso_out_chan = 8,
146 .n_iso_in_chan = 8,
147 .n_ttl_chan = 16,
148 }, {
149 .name = "pcl725",
150 .io_range = 0x02,
151 .is_pcl725 = 1,
152 .n_subdevs = 2,
153 .n_iso_out_chan = 8,
154 .n_iso_in_chan = 8,
155 }, {
156 .name = "p8r8dio",
157 .io_range = 0x02,
158 .is_pcl725 = 1,
159 .has_readback = 1,
160 .n_subdevs = 2,
161 .n_iso_out_chan = 8,
162 .n_iso_in_chan = 8,
163 }, {
164 .name = "acl7225b",
165 .io_range = 0x08, /* only 4 are used */
166 .is_acl7225b = 1,
167 .has_readback = 1,
168 .n_subdevs = 2,
169 .n_iso_out_chan = 16,
170 .n_iso_in_chan = 16,
171 }, {
172 .name = "p16r16dio",
173 .io_range = 0x04,
174 .is_acl7225b = 1,
175 .has_readback = 1,
176 .n_subdevs = 2,
177 .n_iso_out_chan = 16,
178 .n_iso_in_chan = 16,
179 }, {
180 .name = "pcl733",
181 .io_range = 0x04,
182 .n_subdevs = 1,
183 .n_iso_in_chan = 32,
184 }, {
185 .name = "pcl734",
186 .io_range = 0x04,
187 .n_subdevs = 1,
188 .n_iso_out_chan = 32,
189 }, {
190 .name = "opmm-1616-xt",
191 .io_range = 0x10,
192 .is_acl7225b = 1,
193 .has_readback = 1,
194 .n_subdevs = 2,
195 .n_iso_out_chan = 16,
196 .n_iso_in_chan = 16,
197 }, {
198 .name = "pearl-mm-p",
199 .io_range = 0x02,
200 .n_subdevs = 1,
201 .n_iso_out_chan = 16,
202 }, {
203 .name = "ir104-pbf",
204 .io_range = 0x08,
205 .is_ir104 = 1,
206 .has_readback = 1,
207 .n_iso_out_chan = 20,
208 .n_iso_in_chan = 20,
209 },
210 };
211
pcl730_do_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data)212 static int pcl730_do_insn_bits(struct comedi_device *dev,
213 struct comedi_subdevice *s,
214 struct comedi_insn *insn,
215 unsigned int *data)
216 {
217 unsigned long reg = (unsigned long)s->private;
218 unsigned int mask;
219
220 mask = comedi_dio_update_state(s, data);
221 if (mask) {
222 if (mask & 0x00ff)
223 outb(s->state & 0xff, dev->iobase + reg);
224 if ((mask & 0xff00) && (s->n_chan > 8))
225 outb((s->state >> 8) & 0xff, dev->iobase + reg + 1);
226 if ((mask & 0xff0000) && (s->n_chan > 16))
227 outb((s->state >> 16) & 0xff, dev->iobase + reg + 2);
228 if ((mask & 0xff000000) && (s->n_chan > 24))
229 outb((s->state >> 24) & 0xff, dev->iobase + reg + 3);
230 }
231
232 data[1] = s->state;
233
234 return insn->n;
235 }
236
pcl730_get_bits(struct comedi_device *dev, struct comedi_subdevice *s)237 static unsigned int pcl730_get_bits(struct comedi_device *dev,
238 struct comedi_subdevice *s)
239 {
240 unsigned long reg = (unsigned long)s->private;
241 unsigned int val;
242
243 val = inb(dev->iobase + reg);
244 if (s->n_chan > 8)
245 val |= (inb(dev->iobase + reg + 1) << 8);
246 if (s->n_chan > 16)
247 val |= (inb(dev->iobase + reg + 2) << 16);
248 if (s->n_chan > 24)
249 val |= (inb(dev->iobase + reg + 3) << 24);
250
251 return val;
252 }
253
pcl730_di_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data)254 static int pcl730_di_insn_bits(struct comedi_device *dev,
255 struct comedi_subdevice *s,
256 struct comedi_insn *insn,
257 unsigned int *data)
258 {
259 data[1] = pcl730_get_bits(dev, s);
260
261 return insn->n;
262 }
263
pcl730_attach(struct comedi_device *dev, struct comedi_devconfig *it)264 static int pcl730_attach(struct comedi_device *dev,
265 struct comedi_devconfig *it)
266 {
267 const struct pcl730_board *board = dev->board_ptr;
268 struct comedi_subdevice *s;
269 int subdev;
270 int ret;
271
272 ret = comedi_request_region(dev, it->options[0], board->io_range);
273 if (ret)
274 return ret;
275
276 ret = comedi_alloc_subdevices(dev, board->n_subdevs);
277 if (ret)
278 return ret;
279
280 subdev = 0;
281
282 if (board->n_iso_out_chan) {
283 /* Isolated Digital Outputs */
284 s = &dev->subdevices[subdev++];
285 s->type = COMEDI_SUBD_DO;
286 s->subdev_flags = SDF_WRITABLE;
287 s->n_chan = board->n_iso_out_chan;
288 s->maxdata = 1;
289 s->range_table = &range_digital;
290 s->insn_bits = pcl730_do_insn_bits;
291 s->private = (void *)0;
292
293 /* get the initial state if supported */
294 if (board->has_readback)
295 s->state = pcl730_get_bits(dev, s);
296 }
297
298 if (board->n_iso_in_chan) {
299 /* Isolated Digital Inputs */
300 s = &dev->subdevices[subdev++];
301 s->type = COMEDI_SUBD_DI;
302 s->subdev_flags = SDF_READABLE;
303 s->n_chan = board->n_iso_in_chan;
304 s->maxdata = 1;
305 s->range_table = &range_digital;
306 s->insn_bits = pcl730_di_insn_bits;
307 s->private = board->is_ir104 ? (void *)4 :
308 board->is_acl7225b ? (void *)2 :
309 board->is_pcl725 ? (void *)1 : (void *)0;
310 }
311
312 if (board->has_ttl_io) {
313 /* TTL Digital Outputs */
314 s = &dev->subdevices[subdev++];
315 s->type = COMEDI_SUBD_DO;
316 s->subdev_flags = SDF_WRITABLE;
317 s->n_chan = board->n_ttl_chan;
318 s->maxdata = 1;
319 s->range_table = &range_digital;
320 s->insn_bits = pcl730_do_insn_bits;
321 s->private = (void *)2;
322
323 /* TTL Digital Inputs */
324 s = &dev->subdevices[subdev++];
325 s->type = COMEDI_SUBD_DI;
326 s->subdev_flags = SDF_READABLE;
327 s->n_chan = board->n_ttl_chan;
328 s->maxdata = 1;
329 s->range_table = &range_digital;
330 s->insn_bits = pcl730_di_insn_bits;
331 s->private = (void *)2;
332 }
333
334 return 0;
335 }
336
337 static struct comedi_driver pcl730_driver = {
338 .driver_name = "pcl730",
339 .module = THIS_MODULE,
340 .attach = pcl730_attach,
341 .detach = comedi_legacy_detach,
342 .board_name = &pcl730_boards[0].name,
343 .num_names = ARRAY_SIZE(pcl730_boards),
344 .offset = sizeof(struct pcl730_board),
345 };
346 module_comedi_driver(pcl730_driver);
347
348 MODULE_AUTHOR("Comedi https://www.comedi.org");
349 MODULE_DESCRIPTION("Comedi low-level driver");
350 MODULE_LICENSE("GPL");
351