--- /dev/null
+/*
+ comedi/drivers/das16m1.c
+ CIO-DAS16/M1 driver
+ Author: Frank Mori Hess, based on code from the das16
+ driver.
+ Copyright (C) 2001 Frank Mori Hess <fmhess@users.sourceforge.net>
+
+ COMEDI - Linux Control and Measurement Device Interface
+ Copyright (C) 2000 David A. Schleef <ds@schleef.org>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+************************************************************************
+*/
+/*
+Driver: das16m1
+Description: CIO-DAS16/M1
+Author: Frank Mori Hess <fmhess@users.sourceforge.net>
+Devices: [Measurement Computing] CIO-DAS16/M1 (cio-das16/m1)
+Status: works
+
+This driver supports a single board - the CIO-DAS16/M1.
+As far as I know, there are no other boards that have
+the same register layout. Even the CIO-DAS16/M1/16 is
+significantly different.
+
+I was _barely_ able to reach the full 1 MHz capability
+of this board, using a hard real-time interrupt
+(set the TRIG_RT flag in your struct comedi_cmd and use
+rtlinux or RTAI). The board can't do dma, so the bottleneck is
+pulling the data across the ISA bus. I timed the interrupt
+handler, and it took my computer ~470 microseconds to pull 512
+samples from the board. So at 1 Mhz sampling rate,
+expect your CPU to be spending almost all of its
+time in the interrupt handler.
+
+This board has some unusual restrictions for its channel/gain list. If the
+list has 2 or more channels in it, then two conditions must be satisfied:
+(1) - even/odd channels must appear at even/odd indices in the list
+(2) - the list must have an even number of entries.
+
+Options:
+ [0] - base io address
+ [1] - irq (optional, but you probably want it)
+
+irq can be omitted, although the cmd interface will not work without it.
+*/
+
+#include <linux/ioport.h>
+#include "../comedidev.h"
+
+#include "8255.h"
+#include "8253.h"
+#include "comedi_fc.h"
+
+#define DAS16M1_SIZE 16
+#define DAS16M1_SIZE2 8
+
+#define DAS16M1_XTAL 100 //10 MHz master clock
+
+#define FIFO_SIZE 1024 // 1024 sample fifo
+
+/*
+ CIO-DAS16_M1.pdf
+
+ "cio-das16/m1"
+
+ 0 a/d bits 0-3, mux start 12 bit
+ 1 a/d bits 4-11 unused
+ 2 status control
+ 3 di 4 bit do 4 bit
+ 4 unused clear interrupt
+ 5 interrupt, pacer
+ 6 channel/gain queue address
+ 7 channel/gain queue data
+ 89ab 8254
+ cdef 8254
+ 400 8255
+ 404-407 8254
+
+*/
+
+#define DAS16M1_AI 0 // 16-bit wide register
+#define AI_CHAN(x) ((x) & 0xf)
+#define DAS16M1_CS 2
+#define EXT_TRIG_BIT 0x1
+#define OVRUN 0x20
+#define IRQDATA 0x80
+#define DAS16M1_DIO 3
+#define DAS16M1_CLEAR_INTR 4
+#define DAS16M1_INTR_CONTROL 5
+#define EXT_PACER 0x2
+#define INT_PACER 0x3
+#define PACER_MASK 0x3
+#define INTE 0x80
+#define DAS16M1_QUEUE_ADDR 6
+#define DAS16M1_QUEUE_DATA 7
+#define Q_CHAN(x) ((x) & 0x7)
+#define Q_RANGE(x) (((x) & 0xf) << 4)
+#define UNIPOLAR 0x40
+#define DAS16M1_8254_FIRST 0x8
+#define DAS16M1_8254_FIRST_CNTRL 0xb
+#define TOTAL_CLEAR 0x30
+#define DAS16M1_8254_SECOND 0xc
+#define DAS16M1_82C55 0x400
+#define DAS16M1_8254_THIRD 0x404
+
+static const struct comedi_lrange range_das16m1 = { 9,
+ {
+ BIP_RANGE(5),
+ BIP_RANGE(2.5),
+ BIP_RANGE(1.25),
+ BIP_RANGE(0.625),
+ UNI_RANGE(10),
+ UNI_RANGE(5),
+ UNI_RANGE(2.5),
+ UNI_RANGE(1.25),
+ BIP_RANGE(10),
+ }
+};
+
+static int das16m1_do_wbits(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data);
+static int das16m1_di_rbits(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data);
+static int das16m1_ai_rinsn(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data);
+
+static int das16m1_cmd_test(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_cmd * cmd);
+static int das16m1_cmd_exec(struct comedi_device * dev, struct comedi_subdevice * s);
+static int das16m1_cancel(struct comedi_device * dev, struct comedi_subdevice * s);
+
+static int das16m1_poll(struct comedi_device * dev, struct comedi_subdevice * s);
+static irqreturn_t das16m1_interrupt(int irq, void *d PT_REGS_ARG);
+static void das16m1_handler(struct comedi_device * dev, unsigned int status);
+
+static unsigned int das16m1_set_pacer(struct comedi_device * dev, unsigned int ns,
+ int round_flag);
+
+static int das16m1_irq_bits(unsigned int irq);
+
+struct das16m1_board {
+ const char *name;
+ unsigned int ai_speed;
+};
+
+static const struct das16m1_board das16m1_boards[] = {
+ {
+ name: "cio-das16/m1", // CIO-DAS16_M1.pdf
+ ai_speed:1000, // 1MHz max speed
+ },
+};
+
+#define das16m1_num_boards ((sizeof(das16m1_boards)) / (sizeof(das16m1_boards[0])))
+
+static int das16m1_attach(struct comedi_device * dev, struct comedi_devconfig * it);
+static int das16m1_detach(struct comedi_device * dev);
+static struct comedi_driver driver_das16m1 = {
+ driver_name:"das16m1",
+ module:THIS_MODULE,
+ attach:das16m1_attach,
+ detach:das16m1_detach,
+ board_name:&das16m1_boards[0].name,
+ num_names:das16m1_num_boards,
+ offset:sizeof(das16m1_boards[0]),
+};
+
+struct das16m1_private_struct {
+ unsigned int control_state;
+ volatile unsigned int adc_count; // number of samples completed
+ /* initial value in lower half of hardware conversion counter,
+ * needed to keep track of whether new count has been loaded into
+ * counter yet (loaded by first sample conversion) */
+ u16 initial_hw_count;
+ short ai_buffer[FIFO_SIZE];
+ unsigned int do_bits; // saves status of digital output bits
+ unsigned int divisor1; // divides master clock to obtain conversion speed
+ unsigned int divisor2; // divides master clock to obtain conversion speed
+};
+#define devpriv ((struct das16m1_private_struct *)(dev->private))
+#define thisboard ((const struct das16m1_board *)(dev->board_ptr))
+
+COMEDI_INITCLEANUP(driver_das16m1);
+
+static inline short munge_sample(short data)
+{
+ return (data >> 4) & 0xfff;
+}
+
+static int das16m1_cmd_test(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_cmd * cmd)
+{
+ unsigned int err = 0, tmp, i;
+
+ /* make sure triggers are valid */
+ tmp = cmd->start_src;
+ cmd->start_src &= TRIG_NOW | TRIG_EXT;
+ if (!cmd->start_src || tmp != cmd->start_src)
+ err++;
+
+ tmp = cmd->scan_begin_src;
+ cmd->scan_begin_src &= TRIG_FOLLOW;
+ if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
+ err++;
+
+ tmp = cmd->convert_src;
+ cmd->convert_src &= TRIG_TIMER | TRIG_EXT;
+ if (!cmd->convert_src || tmp != cmd->convert_src)
+ err++;
+
+ tmp = cmd->scan_end_src;
+ cmd->scan_end_src &= TRIG_COUNT;
+ if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
+ err++;
+
+ tmp = cmd->stop_src;
+ cmd->stop_src &= TRIG_COUNT | TRIG_NONE;
+ if (!cmd->stop_src || tmp != cmd->stop_src)
+ err++;
+
+ if (err)
+ return 1;
+
+ /* step 2: make sure trigger sources are unique and mutually compatible */
+ if (cmd->stop_src != TRIG_COUNT && cmd->stop_src != TRIG_NONE)
+ err++;
+ if (cmd->start_src != TRIG_NOW && cmd->start_src != TRIG_EXT)
+ err++;
+ if (cmd->convert_src != TRIG_TIMER && cmd->convert_src != TRIG_EXT)
+ err++;
+
+ if (err)
+ return 2;
+
+ /* step 3: make sure arguments are trivially compatible */
+ if (cmd->start_arg != 0) {
+ cmd->start_arg = 0;
+ err++;
+ }
+
+ if (cmd->scan_begin_src == TRIG_FOLLOW) {
+ /* internal trigger */
+ if (cmd->scan_begin_arg != 0) {
+ cmd->scan_begin_arg = 0;
+ err++;
+ }
+ }
+
+ if (cmd->convert_src == TRIG_TIMER) {
+ if (cmd->convert_arg < thisboard->ai_speed) {
+ cmd->convert_arg = thisboard->ai_speed;
+ err++;
+ }
+ }
+
+ if (cmd->scan_end_arg != cmd->chanlist_len) {
+ cmd->scan_end_arg = cmd->chanlist_len;
+ err++;
+ }
+
+ if (cmd->stop_src == TRIG_COUNT) {
+ /* any count is allowed */
+ } else {
+ /* TRIG_NONE */
+ if (cmd->stop_arg != 0) {
+ cmd->stop_arg = 0;
+ err++;
+ }
+ }
+
+ if (err)
+ return 3;
+
+ /* step 4: fix up arguments */
+
+ if (cmd->convert_src == TRIG_TIMER) {
+ tmp = cmd->convert_arg;
+ /* calculate counter values that give desired timing */
+ i8253_cascade_ns_to_timer_2div(DAS16M1_XTAL,
+ &(devpriv->divisor1), &(devpriv->divisor2),
+ &(cmd->convert_arg), cmd->flags & TRIG_ROUND_MASK);
+ if (tmp != cmd->convert_arg)
+ err++;
+ }
+
+ if (err)
+ return 4;
+
+ // check chanlist against board's peculiarities
+ if (cmd->chanlist && cmd->chanlist_len > 1) {
+ for (i = 0; i < cmd->chanlist_len; i++) {
+ // even/odd channels must go into even/odd queue addresses
+ if ((i % 2) != (CR_CHAN(cmd->chanlist[i]) % 2)) {
+ comedi_error(dev, "bad chanlist:\n"
+ " even/odd channels must go have even/odd chanlist indices");
+ err++;
+ }
+ }
+ if ((cmd->chanlist_len % 2) != 0) {
+ comedi_error(dev,
+ "chanlist must be of even length or length 1");
+ err++;
+ }
+ }
+
+ if (err)
+ return 5;
+
+ return 0;
+}
+
+static int das16m1_cmd_exec(struct comedi_device * dev, struct comedi_subdevice * s)
+{
+ struct comedi_async *async = s->async;
+ struct comedi_cmd *cmd = &async->cmd;
+ unsigned int byte, i;
+
+ if (dev->irq == 0) {
+ comedi_error(dev, "irq required to execute comedi_cmd");
+ return -1;
+ }
+
+ /* disable interrupts and internal pacer */
+ devpriv->control_state &= ~INTE & ~PACER_MASK;
+ outb(devpriv->control_state, dev->iobase + DAS16M1_INTR_CONTROL);
+
+ // set software count
+ devpriv->adc_count = 0;
+ /* Initialize lower half of hardware counter, used to determine how
+ * many samples are in fifo. Value doesn't actually load into counter
+ * until counter's next clock (the next a/d conversion) */
+ i8254_load(dev->iobase + DAS16M1_8254_FIRST, 0, 1, 0, 2);
+ /* remember current reading of counter so we know when counter has
+ * actually been loaded */
+ devpriv->initial_hw_count =
+ i8254_read(dev->iobase + DAS16M1_8254_FIRST, 0, 1);
+ /* setup channel/gain queue */
+ for (i = 0; i < cmd->chanlist_len; i++) {
+ outb(i, dev->iobase + DAS16M1_QUEUE_ADDR);
+ byte = Q_CHAN(CR_CHAN(cmd->
+ chanlist[i])) | Q_RANGE(CR_RANGE(cmd->
+ chanlist[i]));
+ outb(byte, dev->iobase + DAS16M1_QUEUE_DATA);
+ }
+
+ /* set counter mode and counts */
+ cmd->convert_arg =
+ das16m1_set_pacer(dev, cmd->convert_arg,
+ cmd->flags & TRIG_ROUND_MASK);
+
+ // set control & status register
+ byte = 0;
+ /* if we are using external start trigger (also board dislikes having
+ * both start and conversion triggers external simultaneously) */
+ if (cmd->start_src == TRIG_EXT && cmd->convert_src != TRIG_EXT) {
+ byte |= EXT_TRIG_BIT;
+ }
+ outb(byte, dev->iobase + DAS16M1_CS);
+ /* clear interrupt bit */
+ outb(0, dev->iobase + DAS16M1_CLEAR_INTR);
+
+ /* enable interrupts and internal pacer */
+ devpriv->control_state &= ~PACER_MASK;
+ if (cmd->convert_src == TRIG_TIMER) {
+ devpriv->control_state |= INT_PACER;
+ } else {
+ devpriv->control_state |= EXT_PACER;
+ }
+ devpriv->control_state |= INTE;
+ outb(devpriv->control_state, dev->iobase + DAS16M1_INTR_CONTROL);
+
+ return 0;
+}
+
+static int das16m1_cancel(struct comedi_device * dev, struct comedi_subdevice * s)
+{
+ devpriv->control_state &= ~INTE & ~PACER_MASK;
+ outb(devpriv->control_state, dev->iobase + DAS16M1_INTR_CONTROL);
+
+ return 0;
+}
+
+static int das16m1_ai_rinsn(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data)
+{
+ int i, n;
+ int byte;
+ const int timeout = 1000;
+
+ /* disable interrupts and internal pacer */
+ devpriv->control_state &= ~INTE & ~PACER_MASK;
+ outb(devpriv->control_state, dev->iobase + DAS16M1_INTR_CONTROL);
+
+ /* setup channel/gain queue */
+ outb(0, dev->iobase + DAS16M1_QUEUE_ADDR);
+ byte = Q_CHAN(CR_CHAN(insn->chanspec)) | Q_RANGE(CR_RANGE(insn->
+ chanspec));
+ outb(byte, dev->iobase + DAS16M1_QUEUE_DATA);
+
+ for (n = 0; n < insn->n; n++) {
+ /* clear IRQDATA bit */
+ outb(0, dev->iobase + DAS16M1_CLEAR_INTR);
+ /* trigger conversion */
+ outb(0, dev->iobase);
+
+ for (i = 0; i < timeout; i++) {
+ if (inb(dev->iobase + DAS16M1_CS) & IRQDATA)
+ break;
+ }
+ if (i == timeout) {
+ comedi_error(dev, "timeout");
+ return -ETIME;
+ }
+ data[n] = munge_sample(inw(dev->iobase));
+ }
+
+ return n;
+}
+
+static int das16m1_di_rbits(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data)
+{
+ unsigned int bits;
+
+ bits = inb(dev->iobase + DAS16M1_DIO) & 0xf;
+ data[1] = bits;
+ data[0] = 0;
+
+ return 2;
+}
+
+static int das16m1_do_wbits(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data)
+{
+ unsigned int wbits;
+
+ // only set bits that have been masked
+ data[0] &= 0xf;
+ wbits = devpriv->do_bits;
+ // zero bits that have been masked
+ wbits &= ~data[0];
+ // set masked bits
+ wbits |= data[0] & data[1];
+ devpriv->do_bits = wbits;
+ data[1] = wbits;
+
+ outb(devpriv->do_bits, dev->iobase + DAS16M1_DIO);
+
+ return 2;
+}
+
+static int das16m1_poll(struct comedi_device * dev, struct comedi_subdevice * s)
+{
+ unsigned long flags;
+ unsigned int status;
+
+ // prevent race with interrupt handler
+ comedi_spin_lock_irqsave(&dev->spinlock, flags);
+ status = inb(dev->iobase + DAS16M1_CS);
+ das16m1_handler(dev, status);
+ comedi_spin_unlock_irqrestore(&dev->spinlock, flags);
+
+ return s->async->buf_write_count - s->async->buf_read_count;
+}
+
+static irqreturn_t das16m1_interrupt(int irq, void *d PT_REGS_ARG)
+{
+ int status;
+ struct comedi_device *dev = d;
+
+ if (dev->attached == 0) {
+ comedi_error(dev, "premature interrupt");
+ return IRQ_HANDLED;
+ }
+ // prevent race with comedi_poll()
+ spin_lock(&dev->spinlock);
+
+ status = inb(dev->iobase + DAS16M1_CS);
+
+ if ((status & (IRQDATA | OVRUN)) == 0) {
+ comedi_error(dev, "spurious interrupt");
+ spin_unlock(&dev->spinlock);
+ return IRQ_NONE;
+ }
+
+ das16m1_handler(dev, status);
+
+ /* clear interrupt */
+ outb(0, dev->iobase + DAS16M1_CLEAR_INTR);
+
+ spin_unlock(&dev->spinlock);
+ return IRQ_HANDLED;
+}
+
+static void munge_sample_array(short * array, unsigned int num_elements)
+{
+ unsigned int i;
+
+ for (i = 0; i < num_elements; i++) {
+ array[i] = munge_sample(array[i]);
+ }
+}
+
+static void das16m1_handler(struct comedi_device * dev, unsigned int status)
+{
+ struct comedi_subdevice *s;
+ struct comedi_async *async;
+ struct comedi_cmd *cmd;
+ u16 num_samples;
+ u16 hw_counter;
+
+ s = dev->read_subdev;
+ async = s->async;
+ async->events = 0;
+ cmd = &async->cmd;
+
+ // figure out how many samples are in fifo
+ hw_counter = i8254_read(dev->iobase + DAS16M1_8254_FIRST, 0, 1);
+ /* make sure hardware counter reading is not bogus due to initial value
+ * not having been loaded yet */
+ if (devpriv->adc_count == 0 && hw_counter == devpriv->initial_hw_count) {
+ num_samples = 0;
+ } else {
+ /* The calculation of num_samples looks odd, but it uses the following facts.
+ * 16 bit hardware counter is initialized with value of zero (which really
+ * means 0x1000). The counter decrements by one on each conversion
+ * (when the counter decrements from zero it goes to 0xffff). num_samples
+ * is a 16 bit variable, so it will roll over in a similar fashion to the
+ * hardware counter. Work it out, and this is what you get. */
+ num_samples = -hw_counter - devpriv->adc_count;
+ }
+ // check if we only need some of the points
+ if (cmd->stop_src == TRIG_COUNT) {
+ if (num_samples > cmd->stop_arg * cmd->chanlist_len)
+ num_samples = cmd->stop_arg * cmd->chanlist_len;
+ }
+ // make sure we dont try to get too many points if fifo has overrun
+ if (num_samples > FIFO_SIZE)
+ num_samples = FIFO_SIZE;
+ insw(dev->iobase, devpriv->ai_buffer, num_samples);
+ munge_sample_array(devpriv->ai_buffer, num_samples);
+ cfc_write_array_to_buffer(s, devpriv->ai_buffer,
+ num_samples * sizeof(short));
+ devpriv->adc_count += num_samples;
+
+ if (cmd->stop_src == TRIG_COUNT) {
+ if (devpriv->adc_count >= cmd->stop_arg * cmd->chanlist_len) { /* end of acquisition */
+ das16m1_cancel(dev, s);
+ async->events |= COMEDI_CB_EOA;
+ }
+ }
+
+ /* this probably won't catch overruns since the card doesn't generate
+ * overrun interrupts, but we might as well try */
+ if (status & OVRUN) {
+ das16m1_cancel(dev, s);
+ async->events |= COMEDI_CB_EOA | COMEDI_CB_ERROR;
+ comedi_error(dev, "fifo overflow");
+ }
+
+ comedi_event(dev, s);
+
+}
+
+/* This function takes a time in nanoseconds and sets the *
+ * 2 pacer clocks to the closest frequency possible. It also *
+ * returns the actual sampling period. */
+static unsigned int das16m1_set_pacer(struct comedi_device * dev, unsigned int ns,
+ int rounding_flags)
+{
+ i8253_cascade_ns_to_timer_2div(DAS16M1_XTAL, &(devpriv->divisor1),
+ &(devpriv->divisor2), &ns, rounding_flags & TRIG_ROUND_MASK);
+
+ /* Write the values of ctr1 and ctr2 into counters 1 and 2 */
+ i8254_load(dev->iobase + DAS16M1_8254_SECOND, 0, 1, devpriv->divisor1,
+ 2);
+ i8254_load(dev->iobase + DAS16M1_8254_SECOND, 0, 2, devpriv->divisor2,
+ 2);
+
+ return ns;
+}
+
+static int das16m1_irq_bits(unsigned int irq)
+{
+ int ret;
+
+ switch (irq) {
+ case 10:
+ ret = 0x0;
+ break;
+ case 11:
+ ret = 0x1;
+ break;
+ case 12:
+ ret = 0x2;
+ break;
+ case 15:
+ ret = 0x3;
+ break;
+ case 2:
+ ret = 0x4;
+ break;
+ case 3:
+ ret = 0x5;
+ break;
+ case 5:
+ ret = 0x6;
+ break;
+ case 7:
+ ret = 0x7;
+ break;
+ default:
+ return -1;
+ break;
+ }
+ return (ret << 4);
+}
+
+/*
+ * Options list:
+ * 0 I/O base
+ * 1 IRQ
+ */
+
+static int das16m1_attach(struct comedi_device * dev, struct comedi_devconfig * it)
+{
+ struct comedi_subdevice *s;
+ int ret;
+ unsigned int irq;
+ unsigned long iobase;
+
+ iobase = it->options[0];
+
+ printk("comedi%d: das16m1:", dev->minor);
+
+ if ((ret = alloc_private(dev,
+ sizeof(struct das16m1_private_struct))) < 0)
+ return ret;
+
+ dev->board_name = thisboard->name;
+
+ printk(" io 0x%lx-0x%lx 0x%lx-0x%lx",
+ iobase, iobase + DAS16M1_SIZE,
+ iobase + DAS16M1_82C55, iobase + DAS16M1_82C55 + DAS16M1_SIZE2);
+ if (!request_region(iobase, DAS16M1_SIZE, driver_das16m1.driver_name)) {
+ printk(" I/O port conflict\n");
+ return -EIO;
+ }
+ if (!request_region(iobase + DAS16M1_82C55, DAS16M1_SIZE2,
+ driver_das16m1.driver_name)) {
+ release_region(iobase, DAS16M1_SIZE);
+ printk(" I/O port conflict\n");
+ return -EIO;
+ }
+ dev->iobase = iobase;
+
+ /* now for the irq */
+ irq = it->options[1];
+ // make sure it is valid
+ if (das16m1_irq_bits(irq) >= 0) {
+ ret = comedi_request_irq(irq, das16m1_interrupt, 0,
+ driver_das16m1.driver_name, dev);
+ if (ret < 0) {
+ printk(", irq unavailable\n");
+ return ret;
+ }
+ dev->irq = irq;
+ printk(", irq %u\n", irq);
+ } else if (irq == 0) {
+ printk(", no irq\n");
+ } else {
+ printk(", invalid irq\n"
+ " valid irqs are 2, 3, 5, 7, 10, 11, 12, or 15\n");
+ return -EINVAL;
+ }
+
+ if ((ret = alloc_subdevices(dev, 4)) < 0)
+ return ret;
+
+ s = dev->subdevices + 0;
+ dev->read_subdev = s;
+ /* ai */
+ s->type = COMEDI_SUBD_AI;
+ s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
+ s->n_chan = 8;
+ s->subdev_flags = SDF_DIFF;
+ s->len_chanlist = 256;
+ s->maxdata = (1 << 12) - 1;
+ s->range_table = &range_das16m1;
+ s->insn_read = das16m1_ai_rinsn;
+ s->do_cmdtest = das16m1_cmd_test;
+ s->do_cmd = das16m1_cmd_exec;
+ s->cancel = das16m1_cancel;
+ s->poll = das16m1_poll;
+
+ s = dev->subdevices + 1;
+ /* di */
+ s->type = COMEDI_SUBD_DI;
+ s->subdev_flags = SDF_READABLE;
+ s->n_chan = 4;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits = das16m1_di_rbits;
+
+ s = dev->subdevices + 2;
+ /* do */
+ s->type = COMEDI_SUBD_DO;
+ s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
+ s->n_chan = 4;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits = das16m1_do_wbits;
+
+ s = dev->subdevices + 3;
+ /* 8255 */
+ subdev_8255_init(dev, s, NULL, dev->iobase + DAS16M1_82C55);
+
+ // disable upper half of hardware conversion counter so it doesn't mess with us
+ outb(TOTAL_CLEAR, dev->iobase + DAS16M1_8254_FIRST_CNTRL);
+
+ // initialize digital output lines
+ outb(devpriv->do_bits, dev->iobase + DAS16M1_DIO);
+
+ /* set the interrupt level */
+ if (dev->irq)
+ devpriv->control_state = das16m1_irq_bits(dev->irq);
+ else
+ devpriv->control_state = 0;
+ outb(devpriv->control_state, dev->iobase + DAS16M1_INTR_CONTROL);
+
+ return 0;
+}
+
+static int das16m1_detach(struct comedi_device * dev)
+{
+ printk("comedi%d: das16m1: remove\n", dev->minor);
+
+// das16m1_reset(dev);
+
+ if (dev->subdevices)
+ subdev_8255_cleanup(dev, dev->subdevices + 3);
+
+ if (dev->irq)
+ comedi_free_irq(dev->irq, dev);
+
+ if (dev->iobase) {
+ release_region(dev->iobase, DAS16M1_SIZE);
+ release_region(dev->iobase + DAS16M1_82C55, DAS16M1_SIZE2);
+ }
+
+ return 0;
+}
projects / linux-2.6-omap-h63xx.git / blobdiff