--- /dev/null
+/*
+ comedi/drivers/pcl816.c
+
+ Author: Juan Grigera <juan@grigera.com.ar>
+ based on pcl818 by Michal Dobes <dobes@tesnet.cz> and bits of pcl812
+
+ hardware driver for Advantech cards:
+ card: PCL-816, PCL814B
+ driver: pcl816
+*/
+/*
+Driver: pcl816
+Description: Advantech PCL-816 cards, PCL-814
+Author: Juan Grigera <juan@grigera.com.ar>
+Devices: [Advantech] PCL-816 (pcl816), PCL-814B (pcl814b)
+Status: works
+Updated: Tue, 2 Apr 2002 23:15:21 -0800
+
+PCL 816 and 814B have 16 SE/DIFF ADCs, 16 DACs, 16 DI and 16 DO.
+Differences are at resolution (16 vs 12 bits).
+
+The driver support AI command mode, other subdevices not written.
+
+Analog output and digital input and output are not supported.
+
+Configuration Options:
+ [0] - IO Base
+ [1] - IRQ (0=disable, 2, 3, 4, 5, 6, 7)
+ [2] - DMA (0=disable, 1, 3)
+ [3] - 0, 10=10MHz clock for 8254
+ 1= 1MHz clock for 8254
+
+*/
+
+#include <linux/module.h>
+#include <linux/gfp.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+
+#include "../comedidev.h"
+
+#include "comedi_isadma.h"
+#include "comedi_8254.h"
+
+/*
+ * Register I/O map
+ */
+#define PCL816_DO_DI_LSB_REG 0x00
+#define PCL816_DO_DI_MSB_REG 0x01
+#define PCL816_TIMER_BASE 0x04
+#define PCL816_AI_LSB_REG 0x08
+#define PCL816_AI_MSB_REG 0x09
+#define PCL816_RANGE_REG 0x09
+#define PCL816_CLRINT_REG 0x0a
+#define PCL816_MUX_REG 0x0b
+#define PCL816_MUX_SCAN(_first, _last) (((_last) << 4) | (_first))
+#define PCL816_CTRL_REG 0x0c
+#define PCL816_CTRL_DISABLE_TRIG (0 << 0)
+#define PCL816_CTRL_SOFT_TRIG (1 << 0)
+#define PCL816_CTRL_PACER_TRIG (1 << 1)
+#define PCL816_CTRL_EXT_TRIG (1 << 2)
+#define PCL816_CTRL_POE (1 << 3)
+#define PCL816_CTRL_DMAEN (1 << 4)
+#define PCL816_CTRL_INTEN (1 << 5)
+#define PCL816_CTRL_DMASRC_SLOT0 (0 << 6)
+#define PCL816_CTRL_DMASRC_SLOT1 (1 << 6)
+#define PCL816_CTRL_DMASRC_SLOT2 (2 << 6)
+#define PCL816_STATUS_REG 0x0d
+#define PCL816_STATUS_NEXT_CHAN_MASK (0xf << 0)
+#define PCL816_STATUS_INTSRC_MASK (3 << 4)
+#define PCL816_STATUS_INTSRC_SLOT0 (0 << 4)
+#define PCL816_STATUS_INTSRC_SLOT1 (1 << 4)
+#define PCL816_STATUS_INTSRC_SLOT2 (2 << 4)
+#define PCL816_STATUS_INTSRC_DMA (3 << 4)
+#define PCL816_STATUS_INTACT (1 << 6)
+#define PCL816_STATUS_DRDY (1 << 7)
+
+#define MAGIC_DMA_WORD 0x5a5a
+
+static const struct comedi_lrange range_pcl816 = {
+ 8, {
+ BIP_RANGE(10),
+ BIP_RANGE(5),
+ BIP_RANGE(2.5),
+ BIP_RANGE(1.25),
+ UNI_RANGE(10),
+ UNI_RANGE(5),
+ UNI_RANGE(2.5),
+ UNI_RANGE(1.25)
+ }
+};
+
+struct pcl816_board {
+ const char *name;
+ int ai_maxdata;
+ int ao_maxdata;
+ int ai_chanlist;
+};
+
+static const struct pcl816_board boardtypes[] = {
+ {
+ .name = "pcl816",
+ .ai_maxdata = 0xffff,
+ .ao_maxdata = 0xffff,
+ .ai_chanlist = 1024,
+ }, {
+ .name = "pcl814b",
+ .ai_maxdata = 0x3fff,
+ .ao_maxdata = 0x3fff,
+ .ai_chanlist = 1024,
+ },
+};
+
+struct pcl816_private {
+ struct comedi_isadma *dma;
+ unsigned int ai_poll_ptr; /* how many sampes transfer poll */
+ unsigned int ai_cmd_running:1;
+ unsigned int ai_cmd_canceled:1;
+};
+
+static void pcl816_ai_setup_dma(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ unsigned int unread_samples)
+{
+ struct pcl816_private *devpriv = dev->private;
+ struct comedi_isadma *dma = devpriv->dma;
+ struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma];
+ unsigned int max_samples = comedi_bytes_to_samples(s, desc->maxsize);
+ unsigned int nsamples;
+
+ comedi_isadma_disable(dma->chan);
+
+ /*
+ * Determine dma size based on the buffer maxsize plus the number of
+ * unread samples and the number of samples remaining in the command.
+ */
+ nsamples = comedi_nsamples_left(s, max_samples + unread_samples);
+ if (nsamples > unread_samples) {
+ nsamples -= unread_samples;
+ desc->size = comedi_samples_to_bytes(s, nsamples);
+ comedi_isadma_program(desc);
+ }
+}
+
+static void pcl816_ai_set_chan_range(struct comedi_device *dev,
+ unsigned int chan,
+ unsigned int range)
+{
+ outb(chan, dev->iobase + PCL816_MUX_REG);
+ outb(range, dev->iobase + PCL816_RANGE_REG);
+}
+
+static void pcl816_ai_set_chan_scan(struct comedi_device *dev,
+ unsigned int first_chan,
+ unsigned int last_chan)
+{
+ outb(PCL816_MUX_SCAN(first_chan, last_chan),
+ dev->iobase + PCL816_MUX_REG);
+}
+
+static void pcl816_ai_setup_chanlist(struct comedi_device *dev,
+ unsigned int *chanlist,
+ unsigned int seglen)
+{
+ unsigned int first_chan = CR_CHAN(chanlist[0]);
+ unsigned int last_chan;
+ unsigned int range;
+ unsigned int i;
+
+ /* store range list to card */
+ for (i = 0; i < seglen; i++) {
+ last_chan = CR_CHAN(chanlist[i]);
+ range = CR_RANGE(chanlist[i]);
+
+ pcl816_ai_set_chan_range(dev, last_chan, range);
+ }
+
+ udelay(1);
+
+ pcl816_ai_set_chan_scan(dev, first_chan, last_chan);
+}
+
+static void pcl816_ai_clear_eoc(struct comedi_device *dev)
+{
+ /* writing any value clears the interrupt request */
+ outb(0, dev->iobase + PCL816_CLRINT_REG);
+}
+
+static void pcl816_ai_soft_trig(struct comedi_device *dev)
+{
+ /* writing any value triggers a software conversion */
+ outb(0, dev->iobase + PCL816_AI_LSB_REG);
+}
+
+static unsigned int pcl816_ai_get_sample(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ unsigned int val;
+
+ val = inb(dev->iobase + PCL816_AI_MSB_REG) << 8;
+ val |= inb(dev->iobase + PCL816_AI_LSB_REG);
+
+ return val & s->maxdata;
+}
+
+static int pcl816_ai_eoc(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned long context)
+{
+ unsigned int status;
+
+ status = inb(dev->iobase + PCL816_STATUS_REG);
+ if ((status & PCL816_STATUS_DRDY) == 0)
+ return 0;
+ return -EBUSY;
+}
+
+static bool pcl816_ai_next_chan(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ struct comedi_cmd *cmd = &s->async->cmd;
+
+ if (cmd->stop_src == TRIG_COUNT &&
+ s->async->scans_done >= cmd->stop_arg) {
+ s->async->events |= COMEDI_CB_EOA;
+ return false;
+ }
+
+ return true;
+}
+
+static void transfer_from_dma_buf(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ unsigned short *ptr,
+ unsigned int bufptr, unsigned int len)
+{
+ unsigned short val;
+ int i;
+
+ for (i = 0; i < len; i++) {
+ val = ptr[bufptr++];
+ comedi_buf_write_samples(s, &val, 1);
+
+ if (!pcl816_ai_next_chan(dev, s))
+ return;
+ }
+}
+
+static irqreturn_t pcl816_interrupt(int irq, void *d)
+{
+ struct comedi_device *dev = d;
+ struct comedi_subdevice *s = dev->read_subdev;
+ struct pcl816_private *devpriv = dev->private;
+ struct comedi_isadma *dma = devpriv->dma;
+ struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma];
+ unsigned int nsamples;
+ unsigned int bufptr;
+
+ if (!dev->attached || !devpriv->ai_cmd_running) {
+ pcl816_ai_clear_eoc(dev);
+ return IRQ_HANDLED;
+ }
+
+ if (devpriv->ai_cmd_canceled) {
+ devpriv->ai_cmd_canceled = 0;
+ pcl816_ai_clear_eoc(dev);
+ return IRQ_HANDLED;
+ }
+
+ nsamples = comedi_bytes_to_samples(s, desc->size) -
+ devpriv->ai_poll_ptr;
+ bufptr = devpriv->ai_poll_ptr;
+ devpriv->ai_poll_ptr = 0;
+
+ /* restart dma with the next buffer */
+ dma->cur_dma = 1 - dma->cur_dma;
+ pcl816_ai_setup_dma(dev, s, nsamples);
+
+ transfer_from_dma_buf(dev, s, desc->virt_addr, bufptr, nsamples);
+
+ pcl816_ai_clear_eoc(dev);
+
+ comedi_handle_events(dev, s);
+ return IRQ_HANDLED;
+}
+
+static int check_channel_list(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ unsigned int *chanlist,
+ unsigned int chanlen)
+{
+ unsigned int chansegment[16];
+ unsigned int i, nowmustbechan, seglen, segpos;
+
+ /* correct channel and range number check itself comedi/range.c */
+ if (chanlen < 1) {
+ dev_err(dev->class_dev, "range/channel list is empty!\n");
+ return 0;
+ }
+
+ if (chanlen > 1) {
+ /* first channel is every time ok */
+ chansegment[0] = chanlist[0];
+ for (i = 1, seglen = 1; i < chanlen; i++, seglen++) {
+ /* we detect loop, this must by finish */
+ if (chanlist[0] == chanlist[i])
+ break;
+ nowmustbechan =
+ (CR_CHAN(chansegment[i - 1]) + 1) % chanlen;
+ if (nowmustbechan != CR_CHAN(chanlist[i])) {
+ /* channel list isn't continuous :-( */
+ dev_dbg(dev->class_dev,
+ "channel list must be continuous! chanlist[%i]=%d but must be %d or %d!\n",
+ i, CR_CHAN(chanlist[i]), nowmustbechan,
+ CR_CHAN(chanlist[0]));
+ return 0;
+ }
+ /* well, this is next correct channel in list */
+ chansegment[i] = chanlist[i];
+ }
+
+ /* check whole chanlist */
+ for (i = 0, segpos = 0; i < chanlen; i++) {
+ if (chanlist[i] != chansegment[i % seglen]) {
+ dev_dbg(dev->class_dev,
+ "bad channel or range number! chanlist[%i]=%d,%d,%d and not %d,%d,%d!\n",
+ i, CR_CHAN(chansegment[i]),
+ CR_RANGE(chansegment[i]),
+ CR_AREF(chansegment[i]),
+ CR_CHAN(chanlist[i % seglen]),
+ CR_RANGE(chanlist[i % seglen]),
+ CR_AREF(chansegment[i % seglen]));
+ return 0; /* chan/gain list is strange */
+ }
+ }
+ } else {
+ seglen = 1;
+ }
+
+ return seglen; /* we can serve this with MUX logic */
+}
+
+static int pcl816_ai_cmdtest(struct comedi_device *dev,
+ struct comedi_subdevice *s, struct comedi_cmd *cmd)
+{
+ int err = 0;
+
+ /* Step 1 : check if triggers are trivially valid */
+
+ err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
+ err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_FOLLOW);
+ err |= comedi_check_trigger_src(&cmd->convert_src,
+ TRIG_EXT | TRIG_TIMER);
+ err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
+ err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
+
+ if (err)
+ return 1;
+
+ /* Step 2a : make sure trigger sources are unique */
+
+ err |= comedi_check_trigger_is_unique(cmd->convert_src);
+ err |= comedi_check_trigger_is_unique(cmd->stop_src);
+
+ /* Step 2b : and mutually compatible */
+
+ if (err)
+ return 2;
+
+ /* Step 3: check if arguments are trivially valid */
+
+ err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
+ err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
+
+ if (cmd->convert_src == TRIG_TIMER)
+ err |= comedi_check_trigger_arg_min(&cmd->convert_arg, 10000);
+ else /* TRIG_EXT */
+ err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0);
+
+ err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
+ cmd->chanlist_len);
+
+ if (cmd->stop_src == TRIG_COUNT)
+ err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
+ else /* TRIG_NONE */
+ err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
+
+ if (err)
+ return 3;
+
+ /* step 4: fix up any arguments */
+ if (cmd->convert_src == TRIG_TIMER) {
+ unsigned int arg = cmd->convert_arg;
+
+ comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, cmd->flags);
+ err |= comedi_check_trigger_arg_is(&cmd->convert_arg, arg);
+ }
+
+ if (err)
+ return 4;
+
+ /* step 5: complain about special chanlist considerations */
+
+ if (cmd->chanlist) {
+ if (!check_channel_list(dev, s, cmd->chanlist,
+ cmd->chanlist_len))
+ return 5; /* incorrect channels list */
+ }
+
+ return 0;
+}
+
+static int pcl816_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
+{
+ struct pcl816_private *devpriv = dev->private;
+ struct comedi_isadma *dma = devpriv->dma;
+ struct comedi_cmd *cmd = &s->async->cmd;
+ unsigned int ctrl;
+ unsigned int seglen;
+
+ if (devpriv->ai_cmd_running)
+ return -EBUSY;
+
+ seglen = check_channel_list(dev, s, cmd->chanlist, cmd->chanlist_len);
+ if (seglen < 1)
+ return -EINVAL;
+ pcl816_ai_setup_chanlist(dev, cmd->chanlist, seglen);
+ udelay(1);
+
+ devpriv->ai_cmd_running = 1;
+ devpriv->ai_poll_ptr = 0;
+ devpriv->ai_cmd_canceled = 0;
+
+ /* setup and enable dma for the first buffer */
+ dma->cur_dma = 0;
+ pcl816_ai_setup_dma(dev, s, 0);
+
+ comedi_8254_set_mode(dev->pacer, 0, I8254_MODE1 | I8254_BINARY);
+ comedi_8254_write(dev->pacer, 0, 0x0ff);
+ udelay(1);
+ comedi_8254_update_divisors(dev->pacer);
+ comedi_8254_pacer_enable(dev->pacer, 1, 2, true);
+
+ ctrl = PCL816_CTRL_INTEN | PCL816_CTRL_DMAEN | PCL816_CTRL_DMASRC_SLOT0;
+ if (cmd->convert_src == TRIG_TIMER)
+ ctrl |= PCL816_CTRL_PACER_TRIG;
+ else /* TRIG_EXT */
+ ctrl |= PCL816_CTRL_EXT_TRIG;
+
+ outb(ctrl, dev->iobase + PCL816_CTRL_REG);
+ outb((dma->chan << 4) | dev->irq,
+ dev->iobase + PCL816_STATUS_REG);
+
+ return 0;
+}
+
+static int pcl816_ai_poll(struct comedi_device *dev, struct comedi_subdevice *s)
+{
+ struct pcl816_private *devpriv = dev->private;
+ struct comedi_isadma *dma = devpriv->dma;
+ struct comedi_isadma_desc *desc;
+ unsigned long flags;
+ unsigned int poll;
+ int ret;
+
+ spin_lock_irqsave(&dev->spinlock, flags);
+
+ poll = comedi_isadma_poll(dma);
+ poll = comedi_bytes_to_samples(s, poll);
+ if (poll > devpriv->ai_poll_ptr) {
+ desc = &dma->desc[dma->cur_dma];
+ transfer_from_dma_buf(dev, s, desc->virt_addr,
+ devpriv->ai_poll_ptr,
+ poll - devpriv->ai_poll_ptr);
+ /* new buffer position */
+ devpriv->ai_poll_ptr = poll;
+
+ comedi_handle_events(dev, s);
+
+ ret = comedi_buf_n_bytes_ready(s);
+ } else {
+ /* no new samples */
+ ret = 0;
+ }
+ spin_unlock_irqrestore(&dev->spinlock, flags);
+
+ return ret;
+}
+
+static int pcl816_ai_cancel(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ struct pcl816_private *devpriv = dev->private;
+
+ if (!devpriv->ai_cmd_running)
+ return 0;
+
+ outb(PCL816_CTRL_DISABLE_TRIG, dev->iobase + PCL816_CTRL_REG);
+ pcl816_ai_clear_eoc(dev);
+
+ comedi_8254_pacer_enable(dev->pacer, 1, 2, false);
+
+ devpriv->ai_cmd_running = 0;
+ devpriv->ai_cmd_canceled = 1;
+
+ return 0;
+}
+
+static int pcl816_ai_insn_read(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ unsigned int chan = CR_CHAN(insn->chanspec);
+ unsigned int range = CR_RANGE(insn->chanspec);
+ int ret = 0;
+ int i;
+
+ outb(PCL816_CTRL_SOFT_TRIG, dev->iobase + PCL816_CTRL_REG);
+
+ pcl816_ai_set_chan_range(dev, chan, range);
+ pcl816_ai_set_chan_scan(dev, chan, chan);
+
+ for (i = 0; i < insn->n; i++) {
+ pcl816_ai_clear_eoc(dev);
+ pcl816_ai_soft_trig(dev);
+
+ ret = comedi_timeout(dev, s, insn, pcl816_ai_eoc, 0);
+ if (ret)
+ break;
+
+ data[i] = pcl816_ai_get_sample(dev, s);
+ }
+ outb(PCL816_CTRL_DISABLE_TRIG, dev->iobase + PCL816_CTRL_REG);
+ pcl816_ai_clear_eoc(dev);
+
+ return ret ? ret : insn->n;
+}
+
+static int pcl816_di_insn_bits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ data[1] = inb(dev->iobase + PCL816_DO_DI_LSB_REG) |
+ (inb(dev->iobase + PCL816_DO_DI_MSB_REG) << 8);
+
+ return insn->n;
+}
+
+static int pcl816_do_insn_bits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ if (comedi_dio_update_state(s, data)) {
+ outb(s->state & 0xff, dev->iobase + PCL816_DO_DI_LSB_REG);
+ outb((s->state >> 8), dev->iobase + PCL816_DO_DI_MSB_REG);
+ }
+
+ data[1] = s->state;
+
+ return insn->n;
+}
+
+static void pcl816_reset(struct comedi_device *dev)
+{
+ outb(PCL816_CTRL_DISABLE_TRIG, dev->iobase + PCL816_CTRL_REG);
+ pcl816_ai_set_chan_range(dev, 0, 0);
+ pcl816_ai_clear_eoc(dev);
+
+ /* set all digital outputs low */
+ outb(0, dev->iobase + PCL816_DO_DI_LSB_REG);
+ outb(0, dev->iobase + PCL816_DO_DI_MSB_REG);
+}
+
+static void pcl816_alloc_irq_and_dma(struct comedi_device *dev,
+ struct comedi_devconfig *it)
+{
+ struct pcl816_private *devpriv = dev->private;
+ unsigned int irq_num = it->options[1];
+ unsigned int dma_chan = it->options[2];
+
+ /* only IRQs 2-7 and DMA channels 3 and 1 are valid */
+ if (!(irq_num >= 2 && irq_num <= 7) ||
+ !(dma_chan == 3 || dma_chan == 1))
+ return;
+
+ if (request_irq(irq_num, pcl816_interrupt, 0, dev->board_name, dev))
+ return;
+
+ /* DMA uses two 16K buffers */
+ devpriv->dma = comedi_isadma_alloc(dev, 2, dma_chan, dma_chan,
+ PAGE_SIZE * 4, COMEDI_ISADMA_READ);
+ if (!devpriv->dma)
+ free_irq(irq_num, dev);
+ else
+ dev->irq = irq_num;
+}
+
+static void pcl816_free_dma(struct comedi_device *dev)
+{
+ struct pcl816_private *devpriv = dev->private;
+
+ if (devpriv)
+ comedi_isadma_free(devpriv->dma);
+}
+
+static int pcl816_attach(struct comedi_device *dev, struct comedi_devconfig *it)
+{
+ const struct pcl816_board *board = dev->board_ptr;
+ struct pcl816_private *devpriv;
+ struct comedi_subdevice *s;
+ int ret;
+
+ devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
+ if (!devpriv)
+ return -ENOMEM;
+
+ ret = comedi_request_region(dev, it->options[0], 0x10);
+ if (ret)
+ return ret;
+
+ /* an IRQ and DMA are required to support async commands */
+ pcl816_alloc_irq_and_dma(dev, it);
+
+ dev->pacer = comedi_8254_init(dev->iobase + PCL816_TIMER_BASE,
+ I8254_OSC_BASE_10MHZ, I8254_IO8, 0);
+ if (!dev->pacer)
+ return -ENOMEM;
+
+ ret = comedi_alloc_subdevices(dev, 4);
+ if (ret)
+ return ret;
+
+ s = &dev->subdevices[0];
+ s->type = COMEDI_SUBD_AI;
+ s->subdev_flags = SDF_CMD_READ | SDF_DIFF;
+ s->n_chan = 16;
+ s->maxdata = board->ai_maxdata;
+ s->range_table = &range_pcl816;
+ s->insn_read = pcl816_ai_insn_read;
+ if (dev->irq) {
+ dev->read_subdev = s;
+ s->subdev_flags |= SDF_CMD_READ;
+ s->len_chanlist = board->ai_chanlist;
+ s->do_cmdtest = pcl816_ai_cmdtest;
+ s->do_cmd = pcl816_ai_cmd;
+ s->poll = pcl816_ai_poll;
+ s->cancel = pcl816_ai_cancel;
+ }
+
+ /* Analog OUtput subdevice */
+ s = &dev->subdevices[2];
+ s->type = COMEDI_SUBD_UNUSED;
+#if 0
+ subdevs[1] = COMEDI_SUBD_AO;
+ s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
+ s->n_chan = 1;
+ s->maxdata = board->ao_maxdata;
+ s->range_table = &range_pcl816;
+#endif
+
+ /* Digital Input subdevice */
+ s = &dev->subdevices[2];
+ s->type = COMEDI_SUBD_DI;
+ s->subdev_flags = SDF_READABLE;
+ s->n_chan = 16;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits = pcl816_di_insn_bits;
+
+ /* Digital Output subdevice */
+ s = &dev->subdevices[3];
+ s->type = COMEDI_SUBD_DO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = 16;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits = pcl816_do_insn_bits;
+
+ pcl816_reset(dev);
+
+ return 0;
+}
+
+static void pcl816_detach(struct comedi_device *dev)
+{
+ if (dev->private) {
+ pcl816_ai_cancel(dev, dev->read_subdev);
+ pcl816_reset(dev);
+ }
+ pcl816_free_dma(dev);
+ comedi_legacy_detach(dev);
+}
+
+static struct comedi_driver pcl816_driver = {
+ .driver_name = "pcl816",
+ .module = THIS_MODULE,
+ .attach = pcl816_attach,
+ .detach = pcl816_detach,
+ .board_name = &boardtypes[0].name,
+ .num_names = ARRAY_SIZE(boardtypes),
+ .offset = sizeof(struct pcl816_board),
+};
+module_comedi_driver(pcl816_driver);
+
+MODULE_AUTHOR("Comedi http://www.comedi.org");
+MODULE_DESCRIPTION("Comedi low-level driver");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff