serial2002.c revision ca9ed0f295a5e85861c63713406d86643e570580 
1/*
2    comedi/drivers/serial2002.c
3    Skeleton code for a Comedi driver
4
5    COMEDI - Linux Control and Measurement Device Interface
6    Copyright (C) 2002 Anders Blomdell <anders.blomdell@control.lth.se>
7
8    This program is free software; you can redistribute it and/or modify
9    it under the terms of the GNU General Public License as published by
10    the Free Software Foundation; either version 2 of the License, or
11    (at your option) any later version.
12
13    This program is distributed in the hope that it will be useful,
14    but WITHOUT ANY WARRANTY; without even the implied warranty of
15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16    GNU General Public License for more details.
17
18    You should have received a copy of the GNU General Public License
19    along with this program; if not, write to the Free Software
20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21
22*/
23
24/*
25Driver: serial2002
26Description: Driver for serial connected hardware
27Devices:
28Author: Anders Blomdell
29Updated: Fri,  7 Jun 2002 12:56:45 -0700
30Status: in development
31
32*/
33
34#include "../comedidev.h"
35
36#include <linux/delay.h>
37#include <linux/ioport.h>
38
39#include <asm/termios.h>
40#include <asm/ioctls.h>
41#include <linux/serial.h>
42#include <linux/poll.h>
43
44/*
45 * Board descriptions for two imaginary boards.  Describing the
46 * boards in this way is optional, and completely driver-dependent.
47 * Some drivers use arrays such as this, other do not.
48 */
49struct serial2002_board {
50	const char *name;
51};
52
53static const struct serial2002_board serial2002_boards[] = {
54	{
55      name:	"serial2002"}
56};
57
58/*
59 * Useful for shorthand access to the particular board structure
60 */
61#define thisboard ((const struct serial2002_board *)dev->board_ptr)
62
63struct serial2002_range_table_t {
64
65	// HACK...
66	int length;
67	struct comedi_krange range;
68};
69
70
71typedef struct {
72	int port;		// /dev/ttyS<port>
73	int speed;		// baudrate
74	struct file *tty;
75	unsigned int ao_readback[32];
76	unsigned char digital_in_mapping[32];
77	unsigned char digital_out_mapping[32];
78	unsigned char analog_in_mapping[32];
79	unsigned char analog_out_mapping[32];
80	unsigned char encoder_in_mapping[32];
81	struct serial2002_range_table_t in_range[32], out_range[32];
82} serial2002_private;
83
84/*
85 * most drivers define the following macro to make it easy to
86 * access the private structure.
87 */
88#define devpriv ((serial2002_private *)dev->private)
89
90static int serial2002_attach(struct comedi_device * dev, struct comedi_devconfig * it);
91static int serial2002_detach(struct comedi_device * dev);
92struct comedi_driver driver_serial2002 = {
93      driver_name:"serial2002",
94      module:THIS_MODULE,
95      attach:serial2002_attach,
96      detach:serial2002_detach,
97      board_name:&serial2002_boards[0].name,
98      offset:sizeof(struct serial2002_board),
99      num_names:sizeof(serial2002_boards) / sizeof(struct serial2002_board),
100};
101
102static int serial2002_di_rinsn(struct comedi_device * dev, struct comedi_subdevice * s,
103	struct comedi_insn * insn, unsigned int * data);
104static int serial2002_do_winsn(struct comedi_device * dev, struct comedi_subdevice * s,
105	struct comedi_insn * insn, unsigned int * data);
106static int serial2002_ai_rinsn(struct comedi_device * dev, struct comedi_subdevice * s,
107	struct comedi_insn * insn, unsigned int * data);
108static int serial2002_ao_winsn(struct comedi_device * dev, struct comedi_subdevice * s,
109	struct comedi_insn * insn, unsigned int * data);
110static int serial2002_ao_rinsn(struct comedi_device * dev, struct comedi_subdevice * s,
111	struct comedi_insn * insn, unsigned int * data);
112
113struct serial_data {
114	enum { is_invalid, is_digital, is_channel } kind;
115	int index;
116	unsigned long value;
117};
118
119static long tty_ioctl(struct file *f, unsigned op, unsigned long param)
120{
121#ifdef HAVE_UNLOCKED_IOCTL
122  	if (f->f_op->unlocked_ioctl) {
123		return f->f_op->unlocked_ioctl(f, op, param);
124	}
125#endif
126	if (f->f_op->ioctl) {
127	  	return f->f_op->ioctl(f->f_dentry->d_inode, f, op, param);
128	}
129	return -ENOSYS;
130}
131
132static int tty_write(struct file *f, unsigned char *buf, int count)
133{
134	int result;
135	mm_segment_t oldfs;
136
137	oldfs = get_fs();
138	set_fs(KERNEL_DS);
139	f->f_pos = 0;
140	result = f->f_op->write(f, buf, count, &f->f_pos);
141	set_fs(oldfs);
142	return result;
143}
144
145#if 0
146/*
147 * On 2.6.26.3 this occaisonally gave me page faults, worked around by
148 * settings.c_cc[VMIN] = 0; settings.c_cc[VTIME] = 0
149 */
150static int tty_available(struct file *f)
151{
152	long result = 0;
153	mm_segment_t oldfs;
154
155	oldfs = get_fs();
156	set_fs(KERNEL_DS);
157	tty_ioctl(f, FIONREAD, (unsigned long)&result);
158	set_fs(oldfs);
159	return result;
160}
161#endif
162
163static int tty_read(struct file *f, int timeout)
164{
165	int result;
166
167	result = -1;
168	if (!IS_ERR(f)) {
169		mm_segment_t oldfs;
170
171		oldfs = get_fs();
172		set_fs(KERNEL_DS);
173		if (f->f_op->poll) {
174			struct poll_wqueues table;
175			struct timeval start, now;
176
177			do_gettimeofday(&start);
178			poll_initwait(&table);
179			while (1) {
180				long elapsed;
181				int mask;
182
183				mask = f->f_op->poll(f, &table.pt);
184				if (mask & (POLLRDNORM | POLLRDBAND | POLLIN |
185						POLLHUP | POLLERR)) {
186					break;
187				}
188				do_gettimeofday(&now);
189				elapsed =
190					(1000000 * (now.tv_sec - start.tv_sec) +
191					now.tv_usec - start.tv_usec);
192				if (elapsed > timeout) {
193					break;
194				}
195				set_current_state(TASK_INTERRUPTIBLE);
196				schedule_timeout(((timeout -
197							elapsed) * HZ) / 10000);
198			}
199			poll_freewait(&table);
200			{
201			  unsigned char ch;
202
203			  f->f_pos = 0;
204			  if (f->f_op->read(f, &ch, 1, &f->f_pos) == 1) {
205			    result = ch;
206			  }
207			}
208		} else {
209			/* Device does not support poll, busy wait */
210			int retries = 0;
211			while (1) {
212			  	unsigned char ch;
213
214				retries++;
215				if (retries >= timeout) {
216					break;
217				}
218
219				f->f_pos = 0;
220				if (f->f_op->read(f, &ch, 1, &f->f_pos) == 1) {
221				  	result = ch;
222					break;
223				}
224				comedi_udelay(100);
225			}
226		}
227		set_fs(oldfs);
228	}
229	return result;
230}
231
232static void tty_setspeed(struct file *f, int speed)
233{
234	mm_segment_t oldfs;
235
236	oldfs = get_fs();
237	set_fs(KERNEL_DS);
238	{
239		// Set speed
240		struct termios settings;
241
242		tty_ioctl(f, TCGETS, (unsigned long)&settings);
243//    printk("Speed: %d\n", settings.c_cflag & (CBAUD | CBAUDEX));
244		settings.c_iflag = 0;
245		settings.c_oflag = 0;
246		settings.c_lflag = 0;
247		settings.c_cflag = CLOCAL | CS8 | CREAD;
248		settings.c_cc[VMIN] = 0;
249		settings.c_cc[VTIME] = 0;
250		switch (speed) {
251		case 2400:{
252				settings.c_cflag |= B2400;
253			}
254			break;
255		case 4800:{
256				settings.c_cflag |= B4800;
257			}
258			break;
259		case 9600:{
260				settings.c_cflag |= B9600;
261			}
262			break;
263		case 19200:{
264				settings.c_cflag |= B19200;
265			}
266			break;
267		case 38400:{
268				settings.c_cflag |= B38400;
269			}
270			break;
271		case 57600:{
272				settings.c_cflag |= B57600;
273			}
274			break;
275		case 115200:{
276				settings.c_cflag |= B115200;
277			}
278			break;
279		default:{
280				settings.c_cflag |= B9600;
281			}
282			break;
283		}
284		tty_ioctl(f, TCSETS, (unsigned long)&settings);
285//    printk("Speed: %d\n", settings.c_cflag & (CBAUD | CBAUDEX));
286	}
287	{
288		// Set low latency
289		struct serial_struct settings;
290
291		tty_ioctl(f, TIOCGSERIAL, (unsigned long)&settings);
292		settings.flags |= ASYNC_LOW_LATENCY;
293		tty_ioctl(f, TIOCSSERIAL, (unsigned long)&settings);
294	}
295
296	set_fs(oldfs);
297}
298
299static void poll_digital(struct file *f, int channel)
300{
301	char cmd;
302
303	cmd = 0x40 | (channel & 0x1f);
304	tty_write(f, &cmd, 1);
305}
306
307static void poll_channel(struct file *f, int channel)
308{
309	char cmd;
310
311	cmd = 0x60 | (channel & 0x1f);
312	tty_write(f, &cmd, 1);
313}
314
315static struct serial_data serial_read(struct file *f, int timeout)
316{
317	struct serial_data result;
318	int length;
319
320	result.kind = is_invalid;
321	result.index = 0;
322	result.value = 0;
323	length = 0;
324	while (1) {
325		int data = tty_read(f, timeout);
326
327		length++;
328		if (data < 0) {
329			printk("serial2002 error\n");
330			break;
331		} else if (data & 0x80) {
332			result.value = (result.value << 7) | (data & 0x7f);
333		} else {
334			if (length == 1) {
335				switch ((data >> 5) & 0x03) {
336				case 0:{
337						result.value = 0;
338						result.kind = is_digital;
339					}
340					break;
341				case 1:{
342						result.value = 1;
343						result.kind = is_digital;
344					}
345					break;
346				}
347			} else {
348				result.value =
349					(result.
350					value << 2) | ((data & 0x60) >> 5);
351				result.kind = is_channel;
352			}
353			result.index = data & 0x1f;
354			break;
355		}
356	}
357	return result;
358
359}
360
361static void serial_write(struct file *f, struct serial_data data)
362{
363	if (data.kind == is_digital) {
364		unsigned char ch =
365			((data.value << 5) & 0x20) | (data.index & 0x1f);
366		tty_write(f, &ch, 1);
367	} else {
368		unsigned char ch[6];
369		int i = 0;
370		if (data.value >= (1L << 30)) {
371			ch[i] = 0x80 | ((data.value >> 30) & 0x03);
372			i++;
373		}
374		if (data.value >= (1L << 23)) {
375			ch[i] = 0x80 | ((data.value >> 23) & 0x7f);
376			i++;
377		}
378		if (data.value >= (1L << 16)) {
379			ch[i] = 0x80 | ((data.value >> 16) & 0x7f);
380			i++;
381		}
382		if (data.value >= (1L << 9)) {
383			ch[i] = 0x80 | ((data.value >> 9) & 0x7f);
384			i++;
385		}
386		ch[i] = 0x80 | ((data.value >> 2) & 0x7f);
387		i++;
388		ch[i] = ((data.value << 5) & 0x60) | (data.index & 0x1f);
389		i++;
390		tty_write(f, ch, i);
391	}
392}
393
394static void serial_2002_open(struct comedi_device * dev)
395{
396	char port[20];
397
398	sprintf(port, "/dev/ttyS%d", devpriv->port);
399	devpriv->tty = filp_open(port, 0, O_RDWR);
400	if (IS_ERR(devpriv->tty)) {
401		printk("serial_2002: file open error = %ld\n",
402			PTR_ERR(devpriv->tty));
403	} else {
404		struct config_t {
405
406			int kind;
407			int bits;
408			int min;
409			int max;
410		};
411
412		struct config_t dig_in_config[32];
413		struct config_t dig_out_config[32];
414		struct config_t chan_in_config[32];
415		struct config_t chan_out_config[32];
416		int i;
417
418		for (i = 0; i < 32; i++) {
419			dig_in_config[i].kind = 0;
420			dig_in_config[i].bits = 0;
421			dig_in_config[i].min = 0;
422			dig_in_config[i].max = 0;
423			dig_out_config[i].kind = 0;
424			dig_out_config[i].bits = 0;
425			dig_out_config[i].min = 0;
426			dig_out_config[i].max = 0;
427			chan_in_config[i].kind = 0;
428			chan_in_config[i].bits = 0;
429			chan_in_config[i].min = 0;
430			chan_in_config[i].max = 0;
431			chan_out_config[i].kind = 0;
432			chan_out_config[i].bits = 0;
433			chan_out_config[i].min = 0;
434			chan_out_config[i].max = 0;
435		}
436
437		tty_setspeed(devpriv->tty, devpriv->speed);
438		poll_channel(devpriv->tty, 31);	// Start reading configuration
439		while (1) {
440			struct serial_data data;
441
442			data = serial_read(devpriv->tty, 1000);
443			if (data.kind != is_channel || data.index != 31
444				|| !(data.value & 0xe0)) {
445				break;
446			} else {
447				int command, channel, kind;
448				struct config_t *cur_config = 0;
449
450				channel = data.value & 0x1f;
451				kind = (data.value >> 5) & 0x7;
452				command = (data.value >> 8) & 0x3;
453				switch (kind) {
454				case 1:{
455						cur_config = dig_in_config;
456					}
457					break;
458				case 2:{
459						cur_config = dig_out_config;
460					}
461					break;
462				case 3:{
463						cur_config = chan_in_config;
464					}
465					break;
466				case 4:{
467						cur_config = chan_out_config;
468					}
469					break;
470				case 5:{
471						cur_config = chan_in_config;
472					}
473					break;
474				}
475
476				if (cur_config) {
477					cur_config[channel].kind = kind;
478					switch (command) {
479					case 0:{
480							cur_config[channel].
481								bits =
482								(data.
483								value >> 10) &
484								0x3f;
485						}
486						break;
487					case 1:{
488							int unit, sign, min;
489							unit = (data.
490								value >> 10) &
491								0x7;
492							sign = (data.
493								value >> 13) &
494								0x1;
495							min = (data.
496								value >> 14) &
497								0xfffff;
498
499							switch (unit) {
500							case 0:{
501									min = min * 1000000;
502								}
503								break;
504							case 1:{
505									min = min * 1000;
506								}
507								break;
508							case 2:{
509									min = min * 1;
510								}
511								break;
512							}
513							if (sign) {
514								min = -min;
515							}
516							cur_config[channel].
517								min = min;
518						}
519						break;
520					case 2:{
521							int unit, sign, max;
522							unit = (data.
523								value >> 10) &
524								0x7;
525							sign = (data.
526								value >> 13) &
527								0x1;
528							max = (data.
529								value >> 14) &
530								0xfffff;
531
532							switch (unit) {
533							case 0:{
534									max = max * 1000000;
535								}
536								break;
537							case 1:{
538									max = max * 1000;
539								}
540								break;
541							case 2:{
542									max = max * 1;
543								}
544								break;
545							}
546							if (sign) {
547								max = -max;
548							}
549							cur_config[channel].
550								max = max;
551						}
552						break;
553					}
554				}
555			}
556		}
557		for (i = 0; i <= 4; i++) {
558			// Fill in subdev data
559			struct config_t *c;
560			unsigned char *mapping = 0;
561			struct serial2002_range_table_t *range = 0;
562			int kind = 0;
563
564			switch (i) {
565			case 0:{
566					c = dig_in_config;
567					mapping = devpriv->digital_in_mapping;
568					kind = 1;
569				}
570				break;
571			case 1:{
572					c = dig_out_config;
573					mapping = devpriv->digital_out_mapping;
574					kind = 2;
575				}
576				break;
577			case 2:{
578					c = chan_in_config;
579					mapping = devpriv->analog_in_mapping;
580					range = devpriv->in_range;
581					kind = 3;
582				}
583				break;
584			case 3:{
585					c = chan_out_config;
586					mapping = devpriv->analog_out_mapping;
587					range = devpriv->out_range;
588					kind = 4;
589				}
590				break;
591			case 4:{
592					c = chan_in_config;
593					mapping = devpriv->encoder_in_mapping;
594					range = devpriv->in_range;
595					kind = 5;
596				}
597				break;
598			default:{
599					c = 0;
600				}
601				break;
602			}
603			if (c) {
604				struct comedi_subdevice *s;
605				const struct comedi_lrange **range_table_list = NULL;
606				unsigned int *maxdata_list;
607				int j, chan;
608
609				for (chan = 0, j = 0; j < 32; j++) {
610					if (c[j].kind == kind) {
611						chan++;
612					}
613				}
614				s = &dev->subdevices[i];
615				s->n_chan = chan;
616				s->maxdata = 0;
617				if (s->maxdata_list) {
618					kfree(s->maxdata_list);
619				}
620				s->maxdata_list = maxdata_list =
621					kmalloc(sizeof(unsigned int) * s->n_chan,
622					GFP_KERNEL);
623				if (s->range_table_list) {
624					kfree(s->range_table_list);
625				}
626				if (range) {
627					s->range_table = 0;
628					s->range_table_list = range_table_list =
629						kmalloc(sizeof
630						(struct serial2002_range_table_t) *
631						s->n_chan, GFP_KERNEL);
632				}
633				for (chan = 0, j = 0; j < 32; j++) {
634					if (c[j].kind == kind) {
635						if (mapping) {
636							mapping[chan] = j;
637						}
638						if (range) {
639							range[j].length = 1;
640							range[j].range.min =
641								c[j].min;
642							range[j].range.max =
643								c[j].max;
644							range_table_list[chan] =
645								(const struct
646								comedi_lrange *)
647								&range[j];
648						}
649						maxdata_list[chan] =
650							((long long)1 << c[j].
651							bits) - 1;
652						chan++;
653					}
654				}
655			}
656		}
657	}
658}
659
660static void serial_2002_close(struct comedi_device * dev)
661{
662	if (!IS_ERR(devpriv->tty) && (devpriv->tty != 0)) {
663		filp_close(devpriv->tty, 0);
664	}
665}
666
667static int serial2002_di_rinsn(struct comedi_device * dev, struct comedi_subdevice * s,
668	struct comedi_insn * insn, unsigned int * data)
669{
670	int n;
671	int chan;
672
673	chan = devpriv->digital_in_mapping[CR_CHAN(insn->chanspec)];
674	for (n = 0; n < insn->n; n++) {
675		struct serial_data read;
676
677		poll_digital(devpriv->tty, chan);
678		while (1) {
679			read = serial_read(devpriv->tty, 1000);
680			if (read.kind != is_digital || read.index == chan) {
681				break;
682			}
683		}
684		data[n] = read.value;
685	}
686	return n;
687}
688
689static int serial2002_do_winsn(struct comedi_device * dev, struct comedi_subdevice * s,
690	struct comedi_insn * insn, unsigned int * data)
691{
692	int n;
693	int chan;
694
695	chan = devpriv->digital_out_mapping[CR_CHAN(insn->chanspec)];
696	for (n = 0; n < insn->n; n++) {
697		struct serial_data write;
698
699		write.kind = is_digital;
700		write.index = chan;
701		write.value = data[n];
702		serial_write(devpriv->tty, write);
703	}
704	return n;
705}
706
707static int serial2002_ai_rinsn(struct comedi_device * dev, struct comedi_subdevice * s,
708	struct comedi_insn * insn, unsigned int * data)
709{
710	int n;
711	int chan;
712
713	chan = devpriv->analog_in_mapping[CR_CHAN(insn->chanspec)];
714	for (n = 0; n < insn->n; n++) {
715		struct serial_data read;
716
717		poll_channel(devpriv->tty, chan);
718		while (1) {
719			read = serial_read(devpriv->tty, 1000);
720			if (read.kind != is_channel || read.index == chan) {
721				break;
722			}
723		}
724		data[n] = read.value;
725	}
726	return n;
727}
728
729static int serial2002_ao_winsn(struct comedi_device * dev, struct comedi_subdevice * s,
730	struct comedi_insn * insn, unsigned int * data)
731{
732	int n;
733	int chan;
734
735	chan = devpriv->analog_out_mapping[CR_CHAN(insn->chanspec)];
736	for (n = 0; n < insn->n; n++) {
737		struct serial_data write;
738
739		write.kind = is_channel;
740		write.index = chan;
741		write.value = data[n];
742		serial_write(devpriv->tty, write);
743		devpriv->ao_readback[chan] = data[n];
744	}
745	return n;
746}
747
748static int serial2002_ao_rinsn(struct comedi_device * dev, struct comedi_subdevice * s,
749	struct comedi_insn * insn, unsigned int * data)
750{
751	int n;
752	int chan = CR_CHAN(insn->chanspec);
753
754	for (n = 0; n < insn->n; n++) {
755		data[n] = devpriv->ao_readback[chan];
756	}
757
758	return n;
759}
760
761static int serial2002_ei_rinsn(struct comedi_device * dev, struct comedi_subdevice * s,
762	struct comedi_insn * insn, unsigned int * data)
763{
764	int n;
765	int chan;
766
767	chan = devpriv->encoder_in_mapping[CR_CHAN(insn->chanspec)];
768	for (n = 0; n < insn->n; n++) {
769		struct serial_data read;
770
771		poll_channel(devpriv->tty, chan);
772		while (1) {
773			read = serial_read(devpriv->tty, 1000);
774			if (read.kind != is_channel || read.index == chan) {
775				break;
776			}
777		}
778		data[n] = read.value;
779	}
780	return n;
781}
782
783static int serial2002_attach(struct comedi_device * dev, struct comedi_devconfig * it)
784{
785	struct comedi_subdevice *s;
786
787	printk("comedi%d: serial2002: ", dev->minor);
788	dev->board_name = thisboard->name;
789	if (alloc_private(dev, sizeof(serial2002_private)) < 0) {
790		return -ENOMEM;
791	}
792	dev->open = serial_2002_open;
793	dev->close = serial_2002_close;
794	devpriv->port = it->options[0];
795	devpriv->speed = it->options[1];
796	printk("/dev/ttyS%d @ %d\n", devpriv->port, devpriv->speed);
797
798	if (alloc_subdevices(dev, 5) < 0)
799		return -ENOMEM;
800
801	/* digital input subdevice */
802	s = dev->subdevices + 0;
803	s->type = COMEDI_SUBD_DI;
804	s->subdev_flags = SDF_READABLE;
805	s->n_chan = 0;
806	s->maxdata = 1;
807	s->range_table = &range_digital;
808	s->insn_read = &serial2002_di_rinsn;
809
810	/* digital output subdevice */
811	s = dev->subdevices + 1;
812	s->type = COMEDI_SUBD_DO;
813	s->subdev_flags = SDF_WRITEABLE;
814	s->n_chan = 0;
815	s->maxdata = 1;
816	s->range_table = &range_digital;
817	s->insn_write = &serial2002_do_winsn;
818
819	/* analog input subdevice */
820	s = dev->subdevices + 2;
821	s->type = COMEDI_SUBD_AI;
822	s->subdev_flags = SDF_READABLE | SDF_GROUND;
823	s->n_chan = 0;
824	s->maxdata = 1;
825	s->range_table = 0;
826	s->insn_read = &serial2002_ai_rinsn;
827
828	/* analog output subdevice */
829	s = dev->subdevices + 3;
830	s->type = COMEDI_SUBD_AO;
831	s->subdev_flags = SDF_WRITEABLE;
832	s->n_chan = 0;
833	s->maxdata = 1;
834	s->range_table = 0;
835	s->insn_write = &serial2002_ao_winsn;
836	s->insn_read = &serial2002_ao_rinsn;
837
838	/* encoder input subdevice */
839	s = dev->subdevices + 4;
840	s->type = COMEDI_SUBD_COUNTER;
841	s->subdev_flags = SDF_READABLE | SDF_LSAMPL;
842	s->n_chan = 0;
843	s->maxdata = 1;
844	s->range_table = 0;
845	s->insn_read = &serial2002_ei_rinsn;
846
847	return 1;
848}
849
850static int serial2002_detach(struct comedi_device * dev)
851{
852	struct comedi_subdevice *s;
853	int i;
854
855	printk("comedi%d: serial2002: remove\n", dev->minor);
856	for (i = 0; i < 4; i++) {
857		s = &dev->subdevices[i];
858		if (s->maxdata_list) {
859			kfree(s->maxdata_list);
860		}
861		if (s->range_table_list) {
862			kfree(s->range_table_list);
863		}
864	}
865	return 0;
866}
867
868COMEDI_INITCLEANUP(driver_serial2002);
869