2 * comedi/drivers/pcl812.c
4 * Author: Michal Dobes <dobes@tesnet.cz>
6 * hardware driver for Advantech cards
7 * card: PCL-812, PCL-812PG, PCL-813, PCL-813B
8 * driver: pcl812, pcl812pg, pcl813, pcl813b
10 * card: ACL-8112DG, ACL-8112HG, ACL-8112PG, ACL-8113, ACL-8216
11 * driver: acl8112dg, acl8112hg, acl8112pg, acl8113, acl8216
12 * and for ICP DAS cards
13 * card: ISO-813, A-821PGH, A-821PGL, A-821PGL-NDA, A-822PGH, A-822PGL,
14 * driver: iso813, a821pgh, a-821pgl, a-821pglnda, a822pgh, a822pgl,
15 * card: A-823PGH, A-823PGL, A-826PG
16 * driver: a823pgh, a823pgl, a826pg
21 * Description: Advantech PCL-812/PG, PCL-813/B,
22 * ADLink ACL-8112DG/HG/PG, ACL-8113, ACL-8216,
23 * ICP DAS A-821PGH/PGL/PGL-NDA, A-822PGH/PGL, A-823PGH/PGL, A-826PG,
25 * Author: Michal Dobes <dobes@tesnet.cz>
26 * Devices: [Advantech] PCL-812 (pcl812), PCL-812PG (pcl812pg),
27 * PCL-813 (pcl813), PCL-813B (pcl813b), [ADLink] ACL-8112DG (acl8112dg),
28 * ACL-8112HG (acl8112hg), ACL-8113 (acl-8113), ACL-8216 (acl8216),
29 * [ICP] ISO-813 (iso813), A-821PGH (a821pgh), A-821PGL (a821pgl),
30 * A-821PGL-NDA (a821pclnda), A-822PGH (a822pgh), A-822PGL (a822pgl),
31 * A-823PGH (a823pgh), A-823PGL (a823pgl), A-826PG (a826pg)
32 * Updated: Mon, 06 Aug 2007 12:03:15 +0100
33 * Status: works (I hope. My board fire up under my hands
34 * and I cann't test all features.)
36 * This driver supports insn and cmd interfaces. Some boards support only insn
37 * because their hardware don't allow more (PCL-813/B, ACL-8113, ISO-813).
38 * Data transfer over DMA is supported only when you measure only one
39 * channel, this is too hardware limitation of these boards.
41 * Options for PCL-812:
43 * [1] - IRQ (0=disable, 2, 3, 4, 5, 6, 7; 10, 11, 12, 14, 15)
44 * [2] - DMA (0=disable, 1, 3)
45 * [3] - 0=trigger source is internal 8253 with 2MHz clock
46 * 1=trigger source is external
47 * [4] - 0=A/D input range is +/-10V
48 * 1=A/D input range is +/-5V
49 * 2=A/D input range is +/-2.5V
50 * 3=A/D input range is +/-1.25V
51 * 4=A/D input range is +/-0.625V
52 * 5=A/D input range is +/-0.3125V
53 * [5] - 0=D/A outputs 0-5V (internal reference -5V)
54 * 1=D/A outputs 0-10V (internal reference -10V)
55 * 2=D/A outputs unknown (external reference)
57 * Options for PCL-812PG, ACL-8112PG:
59 * [1] - IRQ (0=disable, 2, 3, 4, 5, 6, 7; 10, 11, 12, 14, 15)
60 * [2] - DMA (0=disable, 1, 3)
61 * [3] - 0=trigger source is internal 8253 with 2MHz clock
62 * 1=trigger source is external
63 * [4] - 0=A/D have max +/-5V input
64 * 1=A/D have max +/-10V input
65 * [5] - 0=D/A outputs 0-5V (internal reference -5V)
66 * 1=D/A outputs 0-10V (internal reference -10V)
67 * 2=D/A outputs unknown (external reference)
69 * Options for ACL-8112DG/HG, A-822PGL/PGH, A-823PGL/PGH, ACL-8216, A-826PG:
71 * [1] - IRQ (0=disable, 2, 3, 4, 5, 6, 7; 10, 11, 12, 14, 15)
72 * [2] - DMA (0=disable, 1, 3)
73 * [3] - 0=trigger source is internal 8253 with 2MHz clock
74 * 1=trigger source is external
75 * [4] - 0=A/D channels are S.E.
76 * 1=A/D channels are DIFF
77 * [5] - 0=D/A outputs 0-5V (internal reference -5V)
78 * 1=D/A outputs 0-10V (internal reference -10V)
79 * 2=D/A outputs unknown (external reference)
81 * Options for A-821PGL/PGH:
83 * [1] - IRQ (0=disable, 2, 3, 4, 5, 6, 7)
84 * [2] - 0=A/D channels are S.E.
85 * 1=A/D channels are DIFF
86 * [3] - 0=D/A output 0-5V (internal reference -5V)
87 * 1=D/A output 0-10V (internal reference -10V)
89 * Options for A-821PGL-NDA:
91 * [1] - IRQ (0=disable, 2, 3, 4, 5, 6, 7)
92 * [2] - 0=A/D channels are S.E.
93 * 1=A/D channels are DIFF
95 * Options for PCL-813:
98 * Options for PCL-813B:
100 * [1] - 0= bipolar inputs
103 * Options for ACL-8113, ISO-813:
105 * [1] - 0= 10V bipolar inputs
106 * 1= 10V unipolar inputs
107 * 2= 20V bipolar inputs
108 * 3= 20V unipolar inputs
111 #include <linux/module.h>
112 #include <linux/interrupt.h>
113 #include <linux/gfp.h>
114 #include "../comedidev.h"
116 #include <linux/delay.h>
117 #include <linux/io.h>
120 #include "comedi_fc.h"
123 /* hardware types of the cards */
124 #define boardPCL812PG 0 /* and ACL-8112PG */
125 #define boardPCL813B 1
126 #define boardPCL812 2
127 #define boardPCL813 3
128 #define boardISO813 5
129 #define boardACL8113 6
130 #define boardACL8112 7 /* ACL-8112DG/HG, A-822PGL/PGH, A-823PGL/PGH */
131 #define boardACL8216 8 /* and ICP DAS A-826PG */
132 #define boardA821 9 /* PGH, PGL, PGL/NDA versions */
137 #define PCL812_TIMER_BASE 0x00
138 #define PCL812_AI_LSB_REG 0x04
139 #define PCL812_AI_MSB_REG 0x05
140 #define PCL812_AI_MSB_DRDY (1 << 4)
141 #define PCL812_AO_LSB_REG(x) (0x04 + ((x) * 2))
142 #define PCL812_AO_MSB_REG(x) (0x05 + ((x) * 2))
143 #define PCL812_DI_LSB_REG 0x06
144 #define PCL812_DI_MSB_REG 0x07
145 #define PCL812_STATUS_REG 0x08
146 #define PCL812_STATUS_DRDY (1 << 5)
147 #define PCL812_RANGE_REG 0x09
148 #define PCL812_MUX_REG 0x0a
149 #define PCL812_MUX_CHAN(x) ((x) << 0)
150 #define PCL812_MUX_CS0 (1 << 4)
151 #define PCL812_MUX_CS1 (1 << 5)
152 #define PCL812_CTRL_REG 0x0b
153 #define PCL812_CTRL_DISABLE_TRIG (0 << 0)
154 #define PCL812_CTRL_SOFT_TRIG (1 << 0)
155 #define PCL812_CTRL_PACER_DMA_TRIG (2 << 0)
156 #define PCL812_CTRL_PACER_EOC_TRIG (6 << 0)
157 #define PCL812_SOFTTRIG_REG 0x0c
158 #define PCL812_DO_LSB_REG 0x0d
159 #define PCL812_DO_MSB_REG 0x0e
161 #define MAX_CHANLIST_LEN 256 /* length of scan list */
163 static const struct comedi_lrange range_pcl812pg_ai = {
173 static const struct comedi_lrange range_pcl812pg2_ai = {
183 static const struct comedi_lrange range812_bipolar1_25 = {
189 static const struct comedi_lrange range812_bipolar0_625 = {
195 static const struct comedi_lrange range812_bipolar0_3125 = {
201 static const struct comedi_lrange range_pcl813b_ai = {
210 static const struct comedi_lrange range_pcl813b2_ai = {
219 static const struct comedi_lrange range_iso813_1_ai = {
229 static const struct comedi_lrange range_iso813_1_2_ai = {
239 static const struct comedi_lrange range_iso813_2_ai = {
248 static const struct comedi_lrange range_iso813_2_2_ai = {
257 static const struct comedi_lrange range_acl8113_1_ai = {
266 static const struct comedi_lrange range_acl8113_1_2_ai = {
275 static const struct comedi_lrange range_acl8113_2_ai = {
283 static const struct comedi_lrange range_acl8113_2_2_ai = {
291 static const struct comedi_lrange range_acl8112dg_ai = {
305 static const struct comedi_lrange range_acl8112hg_ai = {
322 static const struct comedi_lrange range_a821pgh_ai = {
331 struct pcl812_board {
336 unsigned int ai_ns_min;
337 const struct comedi_lrange *rangelist_ai;
338 unsigned int IRQbits;
339 unsigned int has_dma:1;
340 unsigned int has_16bit_ai:1;
341 unsigned int has_mpc508_mux:1;
342 unsigned int has_dio:1;
345 static const struct pcl812_board boardtypes[] = {
348 .board_type = boardPCL812,
352 .rangelist_ai = &range_bipolar10,
358 .board_type = boardPCL812PG,
362 .rangelist_ai = &range_pcl812pg_ai,
368 .board_type = boardPCL812PG,
372 .rangelist_ai = &range_pcl812pg_ai,
378 .board_type = boardACL8112,
379 .n_aichan = 16, /* 8 differential */
382 .rangelist_ai = &range_acl8112dg_ai,
389 .board_type = boardACL8112,
390 .n_aichan = 16, /* 8 differential */
393 .rangelist_ai = &range_acl8112hg_ai,
400 .board_type = boardA821,
401 .n_aichan = 16, /* 8 differential */
404 .rangelist_ai = &range_pcl813b_ai,
408 .name = "a821pglnda",
409 .board_type = boardA821,
410 .n_aichan = 16, /* 8 differential */
412 .rangelist_ai = &range_pcl813b_ai,
416 .board_type = boardA821,
417 .n_aichan = 16, /* 8 differential */
420 .rangelist_ai = &range_a821pgh_ai,
425 .board_type = boardACL8112,
426 .n_aichan = 16, /* 8 differential */
429 .rangelist_ai = &range_acl8112dg_ai,
435 .board_type = boardACL8112,
436 .n_aichan = 16, /* 8 differential */
439 .rangelist_ai = &range_acl8112hg_ai,
445 .board_type = boardACL8112,
446 .n_aichan = 16, /* 8 differential */
449 .rangelist_ai = &range_acl8112dg_ai,
455 .board_type = boardACL8112,
456 .n_aichan = 16, /* 8 differential */
459 .rangelist_ai = &range_acl8112hg_ai,
465 .board_type = boardPCL813,
467 .rangelist_ai = &range_pcl813b_ai,
470 .board_type = boardPCL813B,
472 .rangelist_ai = &range_pcl813b_ai,
475 .board_type = boardACL8113,
477 .rangelist_ai = &range_acl8113_1_ai,
480 .board_type = boardISO813,
482 .rangelist_ai = &range_iso813_1_ai,
485 .board_type = boardACL8216,
486 .n_aichan = 16, /* 8 differential */
489 .rangelist_ai = &range_pcl813b2_ai,
497 .board_type = boardACL8216,
498 .n_aichan = 16, /* 8 differential */
501 .rangelist_ai = &range_pcl813b2_ai,
509 struct pcl812_private {
510 unsigned char dma; /* >0 use dma ( usedDMA channel) */
511 unsigned char range_correction; /* =1 we must add 1 to range number */
512 unsigned int last_ai_chanspec;
513 unsigned char mode_reg_int; /* there is stored INT number for some card */
514 unsigned int ai_poll_ptr; /* how many sampes transfer poll */
515 unsigned int ai_act_scan; /* how many scans we finished */
516 unsigned int dmapages;
517 unsigned int hwdmasize;
518 unsigned long dmabuf[2]; /* PTR to DMA buf */
519 unsigned int hwdmaptr[2]; /* HW PTR to DMA buf */
520 unsigned int dmabytestomove[2]; /* how many bytes DMA transfer */
521 int next_dma_buf; /* which buffer is next to use */
522 unsigned int dma_runs_to_end; /* how many times we must switch DMA buffers */
523 unsigned int last_dma_run; /* how many bytes to transfer on last DMA buffer */
524 unsigned int max_812_ai_mode0_rangewait; /* setling time for gain */
525 unsigned int ao_readback[2]; /* data for AO readback */
526 unsigned int divisor1;
527 unsigned int divisor2;
528 unsigned int use_diff:1;
529 unsigned int use_mpc508:1;
530 unsigned int use_ext_trg:1;
531 unsigned int ai_dma:1;
532 unsigned int ai_eos:1;
535 static void pcl812_start_pacer(struct comedi_device *dev, bool load_timers)
537 struct pcl812_private *devpriv = dev->private;
538 unsigned long timer_base = dev->iobase + PCL812_TIMER_BASE;
540 i8254_set_mode(timer_base, 0, 2, I8254_MODE2 | I8254_BINARY);
541 i8254_set_mode(timer_base, 0, 1, I8254_MODE2 | I8254_BINARY);
545 i8254_write(timer_base, 0, 2, devpriv->divisor2);
546 i8254_write(timer_base, 0, 1, devpriv->divisor1);
550 static void pcl812_ai_setup_dma(struct comedi_device *dev,
551 struct comedi_subdevice *s)
553 struct pcl812_private *devpriv = dev->private;
554 struct comedi_cmd *cmd = &s->async->cmd;
555 unsigned int dma_flags;
558 /* we use EOS, so adapt DMA buffer to one scan */
559 if (devpriv->ai_eos) {
560 devpriv->dmabytestomove[0] =
561 cmd->chanlist_len * sizeof(short);
562 devpriv->dmabytestomove[1] =
563 cmd->chanlist_len * sizeof(short);
564 devpriv->dma_runs_to_end = 1;
566 devpriv->dmabytestomove[0] = devpriv->hwdmasize;
567 devpriv->dmabytestomove[1] = devpriv->hwdmasize;
568 if (s->async->prealloc_bufsz < devpriv->hwdmasize) {
569 devpriv->dmabytestomove[0] =
570 s->async->prealloc_bufsz;
571 devpriv->dmabytestomove[1] =
572 s->async->prealloc_bufsz;
574 if (cmd->stop_src == TRIG_NONE) {
575 devpriv->dma_runs_to_end = 1;
577 /* how many samples we must transfer? */
578 bytes = cmd->chanlist_len *
579 cmd->stop_arg * sizeof(short);
581 /* how many DMA pages we must fill */
582 devpriv->dma_runs_to_end =
583 bytes / devpriv->dmabytestomove[0];
585 /* on last dma transfer must be moved */
586 devpriv->last_dma_run =
587 bytes % devpriv->dmabytestomove[0];
588 if (devpriv->dma_runs_to_end == 0)
589 devpriv->dmabytestomove[0] =
590 devpriv->last_dma_run;
591 devpriv->dma_runs_to_end--;
594 if (devpriv->dmabytestomove[0] > devpriv->hwdmasize) {
595 devpriv->dmabytestomove[0] = devpriv->hwdmasize;
598 if (devpriv->dmabytestomove[1] > devpriv->hwdmasize) {
599 devpriv->dmabytestomove[1] = devpriv->hwdmasize;
602 devpriv->next_dma_buf = 0;
603 set_dma_mode(devpriv->dma, DMA_MODE_READ);
604 dma_flags = claim_dma_lock();
605 clear_dma_ff(devpriv->dma);
606 set_dma_addr(devpriv->dma, devpriv->hwdmaptr[0]);
607 set_dma_count(devpriv->dma, devpriv->dmabytestomove[0]);
608 release_dma_lock(dma_flags);
609 enable_dma(devpriv->dma);
612 static void pcl812_ai_setup_next_dma(struct comedi_device *dev,
613 struct comedi_subdevice *s)
615 struct pcl812_private *devpriv = dev->private;
616 unsigned long dma_flags;
618 devpriv->next_dma_buf = 1 - devpriv->next_dma_buf;
619 disable_dma(devpriv->dma);
620 set_dma_mode(devpriv->dma, DMA_MODE_READ);
621 dma_flags = claim_dma_lock();
622 set_dma_addr(devpriv->dma, devpriv->hwdmaptr[devpriv->next_dma_buf]);
623 if (devpriv->ai_eos) {
624 set_dma_count(devpriv->dma,
625 devpriv->dmabytestomove[devpriv->next_dma_buf]);
627 if (devpriv->dma_runs_to_end) {
628 set_dma_count(devpriv->dma,
629 devpriv->dmabytestomove[devpriv->
632 set_dma_count(devpriv->dma, devpriv->last_dma_run);
634 devpriv->dma_runs_to_end--;
636 release_dma_lock(dma_flags);
637 enable_dma(devpriv->dma);
640 static void pcl812_ai_set_chan_range(struct comedi_device *dev,
641 unsigned int chanspec, char wait)
643 struct pcl812_private *devpriv = dev->private;
644 unsigned int chan = CR_CHAN(chanspec);
645 unsigned int range = CR_RANGE(chanspec);
646 unsigned int mux = 0;
648 if (chanspec == devpriv->last_ai_chanspec)
651 devpriv->last_ai_chanspec = chanspec;
653 if (devpriv->use_mpc508) {
654 if (devpriv->use_diff) {
655 mux |= PCL812_MUX_CS0 | PCL812_MUX_CS1;
658 mux |= PCL812_MUX_CS0;
660 mux |= PCL812_MUX_CS1;
664 outb(mux | PCL812_MUX_CHAN(chan), dev->iobase + PCL812_MUX_REG);
665 outb(range + devpriv->range_correction, dev->iobase + PCL812_RANGE_REG);
669 * XXX this depends on selected range and can be very long for
670 * some high gain ranges!
672 udelay(devpriv->max_812_ai_mode0_rangewait);
675 static void pcl812_ai_clear_eoc(struct comedi_device *dev)
677 /* writing any value clears the interrupt request */
678 outb(0, dev->iobase + PCL812_STATUS_REG);
681 static void pcl812_ai_soft_trig(struct comedi_device *dev)
683 /* writing any value triggers a software conversion */
684 outb(255, dev->iobase + PCL812_SOFTTRIG_REG);
687 static unsigned int pcl812_ai_get_sample(struct comedi_device *dev,
688 struct comedi_subdevice *s)
692 val = inb(dev->iobase + PCL812_AI_MSB_REG) << 8;
693 val |= inb(dev->iobase + PCL812_AI_LSB_REG);
695 return val & s->maxdata;
698 static int pcl812_ai_eoc(struct comedi_device *dev,
699 struct comedi_subdevice *s,
700 struct comedi_insn *insn,
701 unsigned long context)
705 if (s->maxdata > 0x0fff) {
706 status = inb(dev->iobase + PCL812_STATUS_REG);
707 if ((status & PCL812_STATUS_DRDY) == 0)
710 status = inb(dev->iobase + PCL812_AI_MSB_REG);
711 if ((status & PCL812_AI_MSB_DRDY) == 0)
717 static int pcl812_ai_cmdtest(struct comedi_device *dev,
718 struct comedi_subdevice *s, struct comedi_cmd *cmd)
720 const struct pcl812_board *board = comedi_board(dev);
721 struct pcl812_private *devpriv = dev->private;
726 /* Step 1 : check if triggers are trivially valid */
728 err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW);
729 err |= cfc_check_trigger_src(&cmd->scan_begin_src, TRIG_FOLLOW);
731 if (devpriv->use_ext_trg)
735 err |= cfc_check_trigger_src(&cmd->convert_src, flags);
737 err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
738 err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
743 /* Step 2a : make sure trigger sources are unique */
745 err |= cfc_check_trigger_is_unique(cmd->stop_src);
747 /* Step 2b : and mutually compatible */
752 /* Step 3: check if arguments are trivially valid */
754 err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
755 err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
757 if (cmd->convert_src == TRIG_TIMER)
758 err |= cfc_check_trigger_arg_min(&cmd->convert_arg,
761 err |= cfc_check_trigger_arg_is(&cmd->convert_arg, 0);
763 err |= cfc_check_trigger_arg_min(&cmd->chanlist_len, 1);
764 err |= cfc_check_trigger_arg_max(&cmd->chanlist_len, MAX_CHANLIST_LEN);
765 err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len);
767 if (cmd->stop_src == TRIG_COUNT)
768 err |= cfc_check_trigger_arg_min(&cmd->stop_arg, 1);
770 err |= cfc_check_trigger_arg_is(&cmd->stop_arg, 0);
775 /* step 4: fix up any arguments */
777 if (cmd->convert_src == TRIG_TIMER) {
778 tmp = cmd->convert_arg;
779 i8253_cascade_ns_to_timer(I8254_OSC_BASE_2MHZ,
782 &cmd->convert_arg, cmd->flags);
783 if (cmd->convert_arg < board->ai_ns_min)
784 cmd->convert_arg = board->ai_ns_min;
785 if (tmp != cmd->convert_arg)
795 static int pcl812_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
797 struct pcl812_private *devpriv = dev->private;
798 struct comedi_cmd *cmd = &s->async->cmd;
799 unsigned int ctrl = 0;
802 pcl812_start_pacer(dev, false);
804 pcl812_ai_set_chan_range(dev, cmd->chanlist[0], 1);
806 if (devpriv->dma) { /* check if we can use DMA transfer */
808 for (i = 1; i < cmd->chanlist_len; i++)
809 if (cmd->chanlist[0] != cmd->chanlist[i]) {
810 /* we cann't use DMA :-( */
818 devpriv->ai_act_scan = 0;
819 devpriv->ai_poll_ptr = 0;
820 s->async->cur_chan = 0;
822 /* don't we want wake up every scan? */
823 if (cmd->flags & TRIG_WAKE_EOS) {
826 /* DMA is useless for this situation */
827 if (cmd->chanlist_len == 1)
832 pcl812_ai_setup_dma(dev, s);
834 switch (cmd->convert_src) {
836 pcl812_start_pacer(dev, true);
841 ctrl |= PCL812_CTRL_PACER_DMA_TRIG;
843 ctrl |= PCL812_CTRL_PACER_EOC_TRIG;
844 outb(devpriv->mode_reg_int | ctrl, dev->iobase + PCL812_CTRL_REG);
849 static bool pcl812_ai_next_chan(struct comedi_device *dev,
850 struct comedi_subdevice *s)
852 struct pcl812_private *devpriv = dev->private;
853 struct comedi_cmd *cmd = &s->async->cmd;
855 s->async->events |= COMEDI_CB_BLOCK;
857 s->async->cur_chan++;
858 if (s->async->cur_chan >= cmd->chanlist_len) {
859 s->async->cur_chan = 0;
860 devpriv->ai_act_scan++;
861 s->async->events |= COMEDI_CB_EOS;
864 if (cmd->stop_src == TRIG_COUNT &&
865 devpriv->ai_act_scan >= cmd->stop_arg) {
866 /* all data sampled */
867 s->async->events |= COMEDI_CB_EOA;
874 static void pcl812_handle_eoc(struct comedi_device *dev,
875 struct comedi_subdevice *s)
877 struct comedi_cmd *cmd = &s->async->cmd;
878 unsigned int next_chan;
880 if (pcl812_ai_eoc(dev, s, NULL, 0)) {
881 dev_dbg(dev->class_dev, "A/D cmd IRQ without DRDY!\n");
882 s->async->events |= COMEDI_CB_EOA | COMEDI_CB_ERROR;
886 comedi_buf_put(s->async, pcl812_ai_get_sample(dev, s));
888 /* Set up next channel. Added by abbotti 2010-01-20, but untested. */
889 next_chan = s->async->cur_chan + 1;
890 if (next_chan >= cmd->chanlist_len)
892 if (cmd->chanlist[s->async->cur_chan] != cmd->chanlist[next_chan])
893 pcl812_ai_set_chan_range(dev, cmd->chanlist[next_chan], 0);
895 pcl812_ai_next_chan(dev, s);
898 static void transfer_from_dma_buf(struct comedi_device *dev,
899 struct comedi_subdevice *s,
901 unsigned int bufptr, unsigned int len)
905 for (i = len; i; i--) {
906 comedi_buf_put(s->async, ptr[bufptr++]);
908 if (!pcl812_ai_next_chan(dev, s))
913 static void pcl812_handle_dma(struct comedi_device *dev,
914 struct comedi_subdevice *s)
916 struct pcl812_private *devpriv = dev->private;
920 ptr = (unsigned short *)devpriv->dmabuf[devpriv->next_dma_buf];
921 len = (devpriv->dmabytestomove[devpriv->next_dma_buf] >> 1) -
922 devpriv->ai_poll_ptr;
924 pcl812_ai_setup_next_dma(dev, s);
926 bufptr = devpriv->ai_poll_ptr;
927 devpriv->ai_poll_ptr = 0;
929 transfer_from_dma_buf(dev, s, ptr, bufptr, len);
932 static irqreturn_t pcl812_interrupt(int irq, void *d)
934 struct comedi_device *dev = d;
935 struct comedi_subdevice *s = dev->read_subdev;
936 struct pcl812_private *devpriv = dev->private;
938 if (!dev->attached) {
939 pcl812_ai_clear_eoc(dev);
944 pcl812_handle_dma(dev, s);
946 pcl812_handle_eoc(dev, s);
948 pcl812_ai_clear_eoc(dev);
950 cfc_handle_events(dev, s);
954 static int pcl812_ai_poll(struct comedi_device *dev, struct comedi_subdevice *s)
956 struct pcl812_private *devpriv = dev->private;
958 unsigned int top1, top2, i;
960 if (!devpriv->ai_dma)
961 return 0; /* poll is valid only for DMA transfer */
963 spin_lock_irqsave(&dev->spinlock, flags);
965 for (i = 0; i < 10; i++) {
966 /* where is now DMA */
967 top1 = get_dma_residue(devpriv->ai_dma);
968 top2 = get_dma_residue(devpriv->ai_dma);
974 spin_unlock_irqrestore(&dev->spinlock, flags);
977 /* where is now DMA in buffer */
978 top1 = devpriv->dmabytestomove[1 - devpriv->next_dma_buf] - top1;
979 top1 >>= 1; /* sample position */
980 top2 = top1 - devpriv->ai_poll_ptr;
981 if (top2 < 1) { /* no new samples */
982 spin_unlock_irqrestore(&dev->spinlock, flags);
986 transfer_from_dma_buf(dev, s,
987 (void *)devpriv->dmabuf[1 -
988 devpriv->next_dma_buf],
989 devpriv->ai_poll_ptr, top2);
991 devpriv->ai_poll_ptr = top1; /* new buffer position */
993 spin_unlock_irqrestore(&dev->spinlock, flags);
995 return s->async->buf_write_count - s->async->buf_read_count;
998 static int pcl812_ai_cancel(struct comedi_device *dev,
999 struct comedi_subdevice *s)
1001 struct pcl812_private *devpriv = dev->private;
1003 if (devpriv->ai_dma)
1004 disable_dma(devpriv->dma);
1006 outb(devpriv->mode_reg_int | PCL812_CTRL_DISABLE_TRIG,
1007 dev->iobase + PCL812_CTRL_REG);
1008 pcl812_start_pacer(dev, false);
1009 pcl812_ai_clear_eoc(dev);
1013 static int pcl812_ai_insn_read(struct comedi_device *dev,
1014 struct comedi_subdevice *s,
1015 struct comedi_insn *insn,
1018 struct pcl812_private *devpriv = dev->private;
1022 outb(devpriv->mode_reg_int | PCL812_CTRL_SOFT_TRIG,
1023 dev->iobase + PCL812_CTRL_REG);
1025 pcl812_ai_set_chan_range(dev, insn->chanspec, 1);
1027 for (i = 0; i < insn->n; i++) {
1028 pcl812_ai_clear_eoc(dev);
1029 pcl812_ai_soft_trig(dev);
1031 ret = comedi_timeout(dev, s, insn, pcl812_ai_eoc, 0);
1035 data[i] = pcl812_ai_get_sample(dev, s);
1037 outb(devpriv->mode_reg_int | PCL812_CTRL_DISABLE_TRIG,
1038 dev->iobase + PCL812_CTRL_REG);
1039 pcl812_ai_clear_eoc(dev);
1041 return ret ? ret : insn->n;
1044 static int pcl812_ao_insn_write(struct comedi_device *dev,
1045 struct comedi_subdevice *s,
1046 struct comedi_insn *insn,
1049 struct pcl812_private *devpriv = dev->private;
1050 unsigned int chan = CR_CHAN(insn->chanspec);
1053 for (i = 0; i < insn->n; i++) {
1054 outb((data[i] & 0xff),
1055 dev->iobase + PCL812_AO_LSB_REG(chan));
1056 outb((data[i] >> 8) & 0x0f,
1057 dev->iobase + PCL812_AO_MSB_REG(chan));
1058 devpriv->ao_readback[chan] = data[i];
1064 static int pcl812_ao_insn_read(struct comedi_device *dev,
1065 struct comedi_subdevice *s,
1066 struct comedi_insn *insn,
1069 struct pcl812_private *devpriv = dev->private;
1070 unsigned int chan = CR_CHAN(insn->chanspec);
1073 for (i = 0; i < insn->n; i++)
1074 data[i] = devpriv->ao_readback[chan];
1079 static int pcl812_di_insn_bits(struct comedi_device *dev,
1080 struct comedi_subdevice *s,
1081 struct comedi_insn *insn,
1084 data[1] = inb(dev->iobase + PCL812_DI_LSB_REG) |
1085 (inb(dev->iobase + PCL812_DI_MSB_REG) << 8);
1090 static int pcl812_do_insn_bits(struct comedi_device *dev,
1091 struct comedi_subdevice *s,
1092 struct comedi_insn *insn,
1095 if (comedi_dio_update_state(s, data)) {
1096 outb(s->state & 0xff, dev->iobase + PCL812_DO_LSB_REG);
1097 outb((s->state >> 8), dev->iobase + PCL812_DO_MSB_REG);
1105 static void pcl812_reset(struct comedi_device *dev)
1107 const struct pcl812_board *board = comedi_board(dev);
1108 struct pcl812_private *devpriv = dev->private;
1111 /* disable analog input trigger */
1112 outb(devpriv->mode_reg_int | PCL812_CTRL_DISABLE_TRIG,
1113 dev->iobase + PCL812_CTRL_REG);
1114 pcl812_ai_clear_eoc(dev);
1118 pcl812_start_pacer(dev, false);
1121 * Invalidate last_ai_chanspec then set analog input to
1122 * known channel/range.
1124 devpriv->last_ai_chanspec = CR_PACK(16, 0, 0);
1125 pcl812_ai_set_chan_range(dev, CR_PACK(0, 0, 0), 0);
1127 /* set analog output channels to 0V */
1128 for (chan = 0; chan < board->n_aochan; chan++) {
1129 outb(0, dev->iobase + PCL812_AO_LSB_REG(chan));
1130 outb(0, dev->iobase + PCL812_AO_MSB_REG(chan));
1133 /* set all digital outputs low */
1134 if (board->has_dio) {
1135 outb(0, dev->iobase + PCL812_DO_MSB_REG);
1136 outb(0, dev->iobase + PCL812_DO_LSB_REG);
1140 static void pcl812_set_ai_range_table(struct comedi_device *dev,
1141 struct comedi_subdevice *s,
1142 struct comedi_devconfig *it)
1144 const struct pcl812_board *board = comedi_board(dev);
1145 struct pcl812_private *devpriv = dev->private;
1147 /* default to the range table from the boardinfo */
1148 s->range_table = board->rangelist_ai;
1150 /* now check the user config option based on the boardtype */
1151 switch (board->board_type) {
1153 if (it->options[4] == 1)
1154 s->range_table = &range_pcl812pg2_ai;
1157 switch (it->options[4]) {
1159 s->range_table = &range_bipolar10;
1162 s->range_table = &range_bipolar5;
1165 s->range_table = &range_bipolar2_5;
1168 s->range_table = &range812_bipolar1_25;
1171 s->range_table = &range812_bipolar0_625;
1174 s->range_table = &range812_bipolar0_3125;
1177 s->range_table = &range_bipolar10;
1182 if (it->options[1] == 1)
1183 s->range_table = &range_pcl813b2_ai;
1186 switch (it->options[1]) {
1188 s->range_table = &range_iso813_1_ai;
1191 s->range_table = &range_iso813_1_2_ai;
1194 s->range_table = &range_iso813_2_ai;
1195 devpriv->range_correction = 1;
1198 s->range_table = &range_iso813_2_2_ai;
1199 devpriv->range_correction = 1;
1202 s->range_table = &range_iso813_1_ai;
1207 switch (it->options[1]) {
1209 s->range_table = &range_acl8113_1_ai;
1212 s->range_table = &range_acl8113_1_2_ai;
1215 s->range_table = &range_acl8113_2_ai;
1216 devpriv->range_correction = 1;
1219 s->range_table = &range_acl8113_2_2_ai;
1220 devpriv->range_correction = 1;
1223 s->range_table = &range_acl8113_1_ai;
1230 static int pcl812_attach(struct comedi_device *dev, struct comedi_devconfig *it)
1232 const struct pcl812_board *board = comedi_board(dev);
1233 struct pcl812_private *devpriv;
1234 struct comedi_subdevice *s;
1240 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
1244 ret = comedi_request_region(dev, it->options[0], 0x10);
1248 if ((1 << it->options[1]) & board->IRQbits) {
1249 ret = request_irq(it->options[1], pcl812_interrupt, 0,
1250 dev->board_name, dev);
1252 dev->irq = it->options[1];
1255 /* we need an IRQ to do DMA on channel 3 or 1 */
1256 if (dev->irq && board->has_dma &&
1257 (it->options[2] == 3 || it->options[2] == 1)) {
1258 ret = request_dma(it->options[2], dev->board_name);
1260 dev_err(dev->class_dev,
1261 "unable to request DMA channel %d\n",
1265 devpriv->dma = it->options[2];
1267 devpriv->dmapages = 1; /* we want 8KB */
1268 devpriv->hwdmasize = (1 << devpriv->dmapages) * PAGE_SIZE;
1270 for (i = 0; i < 2; i++) {
1271 unsigned long dmabuf;
1273 dmabuf = __get_dma_pages(GFP_KERNEL, devpriv->dmapages);
1277 devpriv->dmabuf[i] = dmabuf;
1278 devpriv->hwdmaptr[i] = virt_to_bus((void *)dmabuf);
1282 /* differential analog inputs? */
1283 switch (board->board_type) {
1285 if (it->options[2] == 1)
1286 devpriv->use_diff = 1;
1290 if (it->options[4] == 1)
1291 devpriv->use_diff = 1;
1295 n_subdevices = 1; /* all boardtypes have analog inputs */
1296 if (board->n_aochan > 0)
1301 ret = comedi_alloc_subdevices(dev, n_subdevices);
1307 /* Analog Input subdevice */
1308 s = &dev->subdevices[subdev];
1309 s->type = COMEDI_SUBD_AI;
1310 s->subdev_flags = SDF_READABLE;
1311 if (devpriv->use_diff) {
1312 s->subdev_flags |= SDF_DIFF;
1313 s->n_chan = board->n_aichan / 2;
1315 s->subdev_flags |= SDF_GROUND;
1316 s->n_chan = board->n_aichan;
1318 s->maxdata = board->has_16bit_ai ? 0xffff : 0x0fff;
1320 pcl812_set_ai_range_table(dev, s, it);
1322 s->insn_read = pcl812_ai_insn_read;
1325 dev->read_subdev = s;
1326 s->subdev_flags |= SDF_CMD_READ;
1327 s->len_chanlist = MAX_CHANLIST_LEN;
1328 s->do_cmdtest = pcl812_ai_cmdtest;
1329 s->do_cmd = pcl812_ai_cmd;
1330 s->poll = pcl812_ai_poll;
1331 s->cancel = pcl812_ai_cancel;
1334 devpriv->use_mpc508 = board->has_mpc508_mux;
1339 if (board->n_aochan > 0) {
1340 s = &dev->subdevices[subdev];
1341 s->type = COMEDI_SUBD_AO;
1342 s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
1343 s->n_chan = board->n_aochan;
1345 s->range_table = &range_unipolar5;
1346 s->insn_read = pcl812_ao_insn_read;
1347 s->insn_write = pcl812_ao_insn_write;
1348 switch (board->board_type) {
1350 if (it->options[3] == 1)
1351 s->range_table = &range_unipolar10;
1357 if (it->options[5] == 1)
1358 s->range_table = &range_unipolar10;
1359 if (it->options[5] == 2)
1360 s->range_table = &range_unknown;
1366 if (board->has_dio) {
1367 /* Digital Input subdevice */
1368 s = &dev->subdevices[subdev];
1369 s->type = COMEDI_SUBD_DI;
1370 s->subdev_flags = SDF_READABLE;
1373 s->range_table = &range_digital;
1374 s->insn_bits = pcl812_di_insn_bits;
1377 /* Digital Output subdevice */
1378 s = &dev->subdevices[subdev];
1379 s->type = COMEDI_SUBD_DO;
1380 s->subdev_flags = SDF_WRITABLE;
1383 s->range_table = &range_digital;
1384 s->insn_bits = pcl812_do_insn_bits;
1388 switch (board->board_type) {
1393 devpriv->max_812_ai_mode0_rangewait = 1;
1394 if (it->options[3] > 0)
1395 /* we use external trigger */
1396 devpriv->use_ext_trg = 1;
1399 devpriv->max_812_ai_mode0_rangewait = 1;
1400 devpriv->mode_reg_int = (dev->irq << 4) & 0xf0;
1406 /* maybe there must by greatest timeout */
1407 devpriv->max_812_ai_mode0_rangewait = 5;
1416 static void pcl812_detach(struct comedi_device *dev)
1418 struct pcl812_private *devpriv = dev->private;
1421 if (devpriv->dmabuf[0])
1422 free_pages(devpriv->dmabuf[0], devpriv->dmapages);
1423 if (devpriv->dmabuf[1])
1424 free_pages(devpriv->dmabuf[1], devpriv->dmapages);
1426 free_dma(devpriv->dma);
1428 comedi_legacy_detach(dev);
1431 static struct comedi_driver pcl812_driver = {
1432 .driver_name = "pcl812",
1433 .module = THIS_MODULE,
1434 .attach = pcl812_attach,
1435 .detach = pcl812_detach,
1436 .board_name = &boardtypes[0].name,
1437 .num_names = ARRAY_SIZE(boardtypes),
1438 .offset = sizeof(struct pcl812_board),
1440 module_comedi_driver(pcl812_driver);
1442 MODULE_AUTHOR("Comedi http://www.comedi.org");
1443 MODULE_DESCRIPTION("Comedi low-level driver");
1444 MODULE_LICENSE("GPL");