--- /dev/null
+/*
+ comedi/drivers/das800.c
+ Driver for Keitley das800 series boards and compatibles
+ Copyright (C) 2000 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: das800
+Description: Keithley Metrabyte DAS800 (& compatibles)
+Author: Frank Mori Hess <fmhess@users.sourceforge.net>
+Devices: [Keithley Metrabyte] DAS-800 (das-800), DAS-801 (das-801),
+ DAS-802 (das-802),
+ [Measurement Computing] CIO-DAS800 (cio-das800),
+ CIO-DAS801 (cio-das801), CIO-DAS802 (cio-das802),
+ CIO-DAS802/16 (cio-das802/16)
+Status: works, cio-das802/16 untested - email me if you have tested it
+
+Configuration options:
+ [0] - I/O port base address
+ [1] - IRQ (optional, required for timed or externally triggered conversions)
+
+Notes:
+ IRQ can be omitted, although the cmd interface will not work without it.
+
+ All entries in the channel/gain list must use the same gain and be
+ consecutive channels counting upwards in channel number (these are
+ hardware limitations.)
+
+ I've never tested the gain setting stuff since I only have a
+ DAS-800 board with fixed gain.
+
+ The cio-das802/16 does not have a fifo-empty status bit! Therefore
+ only fifo-half-full transfers are possible with this card.
+*/
+/*
+
+cmd triggers supported:
+ start_src: TRIG_NOW | TRIG_EXT
+ scan_begin_src: TRIG_FOLLOW
+ scan_end_src: TRIG_COUNT
+ convert_src: TRIG_TIMER | TRIG_EXT
+ stop_src: TRIG_NONE | TRIG_COUNT
+
+
+*/
+
+#include "../comedidev.h"
+
+#include <linux/ioport.h>
+#include <linux/delay.h>
+
+#include "8253.h"
+#include "comedi_fc.h"
+
+#define DAS800_SIZE 8
+#define TIMER_BASE 1000
+#define N_CHAN_AI 8 // number of analog input channels
+
+/* Registers for the das800 */
+
+#define DAS800_LSB 0
+#define FIFO_EMPTY 0x1
+#define FIFO_OVF 0x2
+#define DAS800_MSB 1
+#define DAS800_CONTROL1 2
+#define CONTROL1_INTE 0x8
+#define DAS800_CONV_CONTROL 2
+#define ITE 0x1
+#define CASC 0x2
+#define DTEN 0x4
+#define IEOC 0x8
+#define EACS 0x10
+#define CONV_HCEN 0x80
+#define DAS800_SCAN_LIMITS 2
+#define DAS800_STATUS 2
+#define IRQ 0x8
+#define BUSY 0x80
+#define DAS800_GAIN 3
+#define CIO_FFOV 0x8 // fifo overflow for cio-das802/16
+#define CIO_ENHF 0x90 // interrupt fifo half full for cio-das802/16
+#define CONTROL1 0x80
+#define CONV_CONTROL 0xa0
+#define SCAN_LIMITS 0xc0
+#define ID 0xe0
+#define DAS800_8254 4
+#define DAS800_STATUS2 7
+#define STATUS2_HCEN 0x80
+#define STATUS2_INTE 0X20
+#define DAS800_ID 7
+
+typedef struct das800_board_struct {
+ const char *name;
+ int ai_speed;
+ const comedi_lrange *ai_range;
+ int resolution;
+} das800_board;
+
+//analog input ranges
+static const comedi_lrange range_das800_ai = {
+ 1,
+ {
+ RANGE(-5, 5),
+ }
+};
+
+static const comedi_lrange range_das801_ai = {
+ 9,
+ {
+ RANGE(-5, 5),
+ RANGE(-10, 10),
+ RANGE(0, 10),
+ RANGE(-0.5, 0.5),
+ RANGE(0, 1),
+ RANGE(-0.05, 0.05),
+ RANGE(0, 0.1),
+ RANGE(-0.01, 0.01),
+ RANGE(0, 0.02),
+ }
+};
+
+static const comedi_lrange range_cio_das801_ai = {
+ 9,
+ {
+ RANGE(-5, 5),
+ RANGE(-10, 10),
+ RANGE(0, 10),
+ RANGE(-0.5, 0.5),
+ RANGE(0, 1),
+ RANGE(-0.05, 0.05),
+ RANGE(0, 0.1),
+ RANGE(-0.005, 0.005),
+ RANGE(0, 0.01),
+ }
+};
+
+static const comedi_lrange range_das802_ai = {
+ 9,
+ {
+ RANGE(-5, 5),
+ RANGE(-10, 10),
+ RANGE(0, 10),
+ RANGE(-2.5, 2.5),
+ RANGE(0, 5),
+ RANGE(-1.25, 1.25),
+ RANGE(0, 2.5),
+ RANGE(-0.625, 0.625),
+ RANGE(0, 1.25),
+ }
+};
+
+static const comedi_lrange range_das80216_ai = {
+ 8,
+ {
+ RANGE(-10, 10),
+ RANGE(0, 10),
+ RANGE(-5, 5),
+ RANGE(0, 5),
+ RANGE(-2.5, 2.5),
+ RANGE(0, 2.5),
+ RANGE(-1.25, 1.25),
+ RANGE(0, 1.25),
+ }
+};
+
+enum { das800, ciodas800, das801, ciodas801, das802, ciodas802, ciodas80216 };
+
+static const das800_board das800_boards[] = {
+ {
+ name: "das-800",
+ ai_speed:25000,
+ ai_range:&range_das800_ai,
+ resolution:12,
+ },
+ {
+ name: "cio-das800",
+ ai_speed:20000,
+ ai_range:&range_das800_ai,
+ resolution:12,
+ },
+ {
+ name: "das-801",
+ ai_speed:25000,
+ ai_range:&range_das801_ai,
+ resolution:12,
+ },
+ {
+ name: "cio-das801",
+ ai_speed:20000,
+ ai_range:&range_cio_das801_ai,
+ resolution:12,
+ },
+ {
+ name: "das-802",
+ ai_speed:25000,
+ ai_range:&range_das802_ai,
+ resolution:12,
+ },
+ {
+ name: "cio-das802",
+ ai_speed:20000,
+ ai_range:&range_das802_ai,
+ resolution:12,
+ },
+ {
+ name: "cio-das802/16",
+ ai_speed:10000,
+ ai_range:&range_das80216_ai,
+ resolution:16,
+ },
+};
+
+/*
+ * Useful for shorthand access to the particular board structure
+ */
+#define thisboard ((const das800_board *)dev->board_ptr)
+
+typedef struct {
+ volatile unsigned int count; /* number of data points left to be taken */
+ volatile int forever; /* flag indicating whether we should take data forever */
+ unsigned int divisor1; /* value to load into board's counter 1 for timed conversions */
+ unsigned int divisor2; /* value to load into board's counter 2 for timed conversions */
+ volatile int do_bits; /* digital output bits */
+} das800_private;
+
+#define devpriv ((das800_private *)dev->private)
+
+static int das800_attach(comedi_device * dev, comedi_devconfig * it);
+static int das800_detach(comedi_device * dev);
+static int das800_cancel(comedi_device * dev, comedi_subdevice * s);
+
+static comedi_driver driver_das800 = {
+ driver_name:"das800",
+ module:THIS_MODULE,
+ attach:das800_attach,
+ detach:das800_detach,
+ num_names:sizeof(das800_boards) / sizeof(das800_board),
+ board_name:&das800_boards[0].name,
+ offset:sizeof(das800_board),
+};
+
+static irqreturn_t das800_interrupt(int irq, void *d PT_REGS_ARG);
+static void enable_das800(comedi_device * dev);
+static void disable_das800(comedi_device * dev);
+static int das800_ai_do_cmdtest(comedi_device * dev, comedi_subdevice * s,
+ comedi_cmd * cmd);
+static int das800_ai_do_cmd(comedi_device * dev, comedi_subdevice * s);
+static int das800_ai_rinsn(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data);
+static int das800_di_rbits(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data);
+static int das800_do_wbits(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data);
+static int das800_probe(comedi_device * dev);
+static int das800_set_frequency(comedi_device * dev);
+
+/* checks and probes das-800 series board type */
+static int das800_probe(comedi_device * dev)
+{
+ int id_bits;
+ unsigned long irq_flags;
+ int board;
+
+ // 'comedi spin lock irqsave' disables even rt interrupts, we use them to protect indirect addressing
+ comedi_spin_lock_irqsave(&dev->spinlock, irq_flags);
+ outb(ID, dev->iobase + DAS800_GAIN); /* select base address + 7 to be ID register */
+ id_bits = inb(dev->iobase + DAS800_ID) & 0x3; /* get id bits */
+ comedi_spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+
+ board = thisboard - das800_boards;
+
+ switch (id_bits) {
+ case 0x0:
+ if (board == das800) {
+ printk(" Board model: DAS-800\n");
+ return board;
+ }
+ if (board == ciodas800) {
+ printk(" Board model: CIO-DAS800\n");
+ return board;
+ }
+ printk(" Board model (probed): DAS-800\n");
+ return das800;
+ break;
+ case 0x2:
+ if (board == das801) {
+ printk(" Board model: DAS-801\n");
+ return board;
+ }
+ if (board == ciodas801) {
+ printk(" Board model: CIO-DAS801\n");
+ return board;
+ }
+ printk(" Board model (probed): DAS-801\n");
+ return das801;
+ break;
+ case 0x3:
+ if (board == das802) {
+ printk(" Board model: DAS-802\n");
+ return board;
+ }
+ if (board == ciodas802) {
+ printk(" Board model: CIO-DAS802\n");
+ return board;
+ }
+ if (board == ciodas80216) {
+ printk(" Board model: CIO-DAS802/16\n");
+ return board;
+ }
+ printk(" Board model (probed): DAS-802\n");
+ return das802;
+ break;
+ default:
+ printk(" Board model: probe returned 0x%x (unknown)\n",
+ id_bits);
+ return board;
+ break;
+ }
+ return -1;
+}
+
+/*
+ * A convenient macro that defines init_module() and cleanup_module(),
+ * as necessary.
+ */
+COMEDI_INITCLEANUP(driver_das800);
+
+/* interrupt service routine */
+static irqreturn_t das800_interrupt(int irq, void *d PT_REGS_ARG)
+{
+ short i; /* loop index */
+ sampl_t dataPoint = 0;
+ comedi_device *dev = d;
+ comedi_subdevice *s = dev->read_subdev; /* analog input subdevice */
+ comedi_async *async;
+ int status;
+ unsigned long irq_flags;
+ static const int max_loops = 128; // half-fifo size for cio-das802/16
+ // flags
+ int fifo_empty = 0;
+ int fifo_overflow = 0;
+
+ status = inb(dev->iobase + DAS800_STATUS);
+ /* if interrupt was not generated by board or driver not attached, quit */
+ if (!(status & IRQ))
+ return IRQ_NONE;
+ if (!(dev->attached))
+ return IRQ_HANDLED;
+
+ /* wait until here to initialize async, since we will get null dereference
+ * if interrupt occurs before driver is fully attached!
+ */
+ async = s->async;
+
+ // if hardware conversions are not enabled, then quit
+ comedi_spin_lock_irqsave(&dev->spinlock, irq_flags);
+ outb(CONTROL1, dev->iobase + DAS800_GAIN); /* select base address + 7 to be STATUS2 register */
+ status = inb(dev->iobase + DAS800_STATUS2) & STATUS2_HCEN;
+ /* don't release spinlock yet since we want to make sure noone else disables hardware conversions */
+ if (status == 0) {
+ comedi_spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+ return IRQ_HANDLED;
+ }
+
+ /* loop while card's fifo is not empty (and limit to half fifo for cio-das802/16) */
+ for (i = 0; i < max_loops; i++) {
+ /* read 16 bits from dev->iobase and dev->iobase + 1 */
+ dataPoint = inb(dev->iobase + DAS800_LSB);
+ dataPoint += inb(dev->iobase + DAS800_MSB) << 8;
+ if (thisboard->resolution == 12) {
+ fifo_empty = dataPoint & FIFO_EMPTY;
+ fifo_overflow = dataPoint & FIFO_OVF;
+ if (fifo_overflow)
+ break;
+ } else {
+ fifo_empty = 0; // cio-das802/16 has no fifo empty status bit
+ }
+ if (fifo_empty) {
+ break;
+ }
+ /* strip off extraneous bits for 12 bit cards */
+ if (thisboard->resolution == 12)
+ dataPoint = (dataPoint >> 4) & 0xfff;
+ /* if there are more data points to collect */
+ if (devpriv->count > 0 || devpriv->forever == 1) {
+ /* write data point to buffer */
+ cfc_write_to_buffer(s, dataPoint);
+ if (devpriv->count > 0)
+ devpriv->count--;
+ }
+ }
+ async->events |= COMEDI_CB_BLOCK;
+ /* check for fifo overflow */
+ if (thisboard->resolution == 12) {
+ fifo_overflow = dataPoint & FIFO_OVF;
+ // else cio-das802/16
+ } else {
+ fifo_overflow = inb(dev->iobase + DAS800_GAIN) & CIO_FFOV;
+ }
+ if (fifo_overflow) {
+ comedi_spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+ comedi_error(dev, "DAS800 FIFO overflow");
+ das800_cancel(dev, dev->subdevices + 0);
+ async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA;
+ comedi_event(dev, s);
+ async->events = 0;
+ return IRQ_HANDLED;
+ }
+ if (devpriv->count > 0 || devpriv->forever == 1) {
+ /* Re-enable card's interrupt.
+ * We already have spinlock, so indirect addressing is safe */
+ outb(CONTROL1, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be control register 1 */
+ outb(CONTROL1_INTE | devpriv->do_bits,
+ dev->iobase + DAS800_CONTROL1);
+ comedi_spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+ /* otherwise, stop taking data */
+ } else {
+ comedi_spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+ disable_das800(dev); /* diable hardware triggered conversions */
+ async->events |= COMEDI_CB_EOA;
+ }
+ comedi_event(dev, s);
+ async->events = 0;
+ return IRQ_HANDLED;
+}
+
+static int das800_attach(comedi_device * dev, comedi_devconfig * it)
+{
+ comedi_subdevice *s;
+ unsigned long iobase = it->options[0];
+ unsigned int irq = it->options[1];
+ unsigned long irq_flags;
+ int board;
+
+ printk("comedi%d: das800: io 0x%lx", dev->minor, iobase);
+ if (irq) {
+ printk(", irq %u", irq);
+ }
+ printk("\n");
+
+ /* allocate and initialize dev->private */
+ if (alloc_private(dev, sizeof(das800_private)) < 0)
+ return -ENOMEM;
+
+ if (iobase == 0) {
+ printk("io base address required for das800\n");
+ return -EINVAL;
+ }
+
+ /* check if io addresses are available */
+ if (!request_region(iobase, DAS800_SIZE, "das800")) {
+ printk("I/O port conflict\n");
+ return -EIO;
+ }
+ dev->iobase = iobase;
+
+ board = das800_probe(dev);
+ if (board < 0) {
+ printk("unable to determine board type\n");
+ return -ENODEV;
+ }
+ dev->board_ptr = das800_boards + board;
+
+ /* grab our IRQ */
+ if (irq == 1 || irq > 7) {
+ printk("irq out of range\n");
+ return -EINVAL;
+ }
+ if (irq) {
+ if (comedi_request_irq(irq, das800_interrupt, 0, "das800", dev)) {
+ printk("unable to allocate irq %u\n", irq);
+ return -EINVAL;
+ }
+ }
+ dev->irq = irq;
+
+ dev->board_name = thisboard->name;
+
+ if (alloc_subdevices(dev, 3) < 0)
+ return -ENOMEM;
+
+ /* analog input subdevice */
+ s = dev->subdevices + 0;
+ dev->read_subdev = s;
+ s->type = COMEDI_SUBD_AI;
+ s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ;
+ s->n_chan = 8;
+ s->len_chanlist = 8;
+ s->maxdata = (1 << thisboard->resolution) - 1;
+ s->range_table = thisboard->ai_range;
+ s->do_cmd = das800_ai_do_cmd;
+ s->do_cmdtest = das800_ai_do_cmdtest;
+ s->insn_read = das800_ai_rinsn;
+ s->cancel = das800_cancel;
+
+ /* di */
+ s = dev->subdevices + 1;
+ s->type = COMEDI_SUBD_DI;
+ s->subdev_flags = SDF_READABLE;
+ s->n_chan = 3;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits = das800_di_rbits;
+
+ /* do */
+ s = dev->subdevices + 2;
+ 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 = das800_do_wbits;
+
+ disable_das800(dev);
+
+ /* initialize digital out channels */
+ comedi_spin_lock_irqsave(&dev->spinlock, irq_flags);
+ outb(CONTROL1, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be control register 1 */
+ outb(CONTROL1_INTE | devpriv->do_bits, dev->iobase + DAS800_CONTROL1);
+ comedi_spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+
+ return 0;
+};
+
+static int das800_detach(comedi_device * dev)
+{
+ printk("comedi%d: das800: remove\n", dev->minor);
+
+ /* only free stuff if it has been allocated by _attach */
+ if (dev->iobase)
+ release_region(dev->iobase, DAS800_SIZE);
+ if (dev->irq)
+ comedi_free_irq(dev->irq, dev);
+ return 0;
+};
+
+static int das800_cancel(comedi_device * dev, comedi_subdevice * s)
+{
+ devpriv->forever = 0;
+ devpriv->count = 0;
+ disable_das800(dev);
+ return 0;
+}
+
+/* enable_das800 makes the card start taking hardware triggered conversions */
+static void enable_das800(comedi_device * dev)
+{
+ unsigned long irq_flags;
+ comedi_spin_lock_irqsave(&dev->spinlock, irq_flags);
+ // enable fifo-half full interrupts for cio-das802/16
+ if (thisboard->resolution == 16)
+ outb(CIO_ENHF, dev->iobase + DAS800_GAIN);
+ outb(CONV_CONTROL, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be conversion control register */
+ outb(CONV_HCEN, dev->iobase + DAS800_CONV_CONTROL); /* enable hardware triggering */
+ outb(CONTROL1, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be control register 1 */
+ outb(CONTROL1_INTE | devpriv->do_bits, dev->iobase + DAS800_CONTROL1); /* enable card's interrupt */
+ comedi_spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+}
+
+/* disable_das800 stops hardware triggered conversions */
+static void disable_das800(comedi_device * dev)
+{
+ unsigned long irq_flags;
+ comedi_spin_lock_irqsave(&dev->spinlock, irq_flags);
+ outb(CONV_CONTROL, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be conversion control register */
+ outb(0x0, dev->iobase + DAS800_CONV_CONTROL); /* disable hardware triggering of conversions */
+ comedi_spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+}
+
+static int das800_ai_do_cmdtest(comedi_device * dev, comedi_subdevice * s,
+ comedi_cmd * cmd)
+{
+ int err = 0;
+ int tmp;
+ int gain, startChan;
+ int i;
+
+ /* step 1: make sure trigger sources are trivially 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->start_src != TRIG_NOW && cmd->start_src != TRIG_EXT)
+ err++;
+ if (cmd->convert_src != TRIG_TIMER && cmd->convert_src != TRIG_EXT)
+ err++;
+ if (cmd->stop_src != TRIG_COUNT && cmd->stop_src != TRIG_NONE)
+ 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->convert_src == TRIG_TIMER) {
+ if (cmd->convert_arg < thisboard->ai_speed) {
+ cmd->convert_arg = thisboard->ai_speed;
+ err++;
+ }
+ }
+ if (!cmd->chanlist_len) {
+ cmd->chanlist_len = 1;
+ err++;
+ }
+ if (cmd->scan_end_arg != cmd->chanlist_len) {
+ cmd->scan_end_arg = cmd->chanlist_len;
+ err++;
+ }
+ if (cmd->stop_src == TRIG_COUNT) {
+ if (!cmd->stop_arg) {
+ cmd->stop_arg = 1;
+ err++;
+ }
+ } else { /* TRIG_NONE */
+ if (cmd->stop_arg != 0) {
+ cmd->stop_arg = 0;
+ err++;
+ }
+ }
+
+ if (err)
+ return 3;
+
+ /* step 4: fix up any arguments */
+
+ if (cmd->convert_src == TRIG_TIMER) {
+ tmp = cmd->convert_arg;
+ /* calculate counter values that give desired timing */
+ i8253_cascade_ns_to_timer_2div(TIMER_BASE, &(devpriv->divisor1),
+ &(devpriv->divisor2), &(cmd->convert_arg),
+ cmd->flags & TRIG_ROUND_MASK);
+ if (tmp != cmd->convert_arg)
+ err++;
+ }
+
+ if (err)
+ return 4;
+
+ // check channel/gain list against card's limitations
+ if (cmd->chanlist) {
+ gain = CR_RANGE(cmd->chanlist[0]);
+ startChan = CR_CHAN(cmd->chanlist[0]);
+ for (i = 1; i < cmd->chanlist_len; i++) {
+ if (CR_CHAN(cmd->chanlist[i]) !=
+ (startChan + i) % N_CHAN_AI) {
+ comedi_error(dev,
+ "entries in chanlist must be consecutive channels, counting upwards\n");
+ err++;
+ }
+ if (CR_RANGE(cmd->chanlist[i]) != gain) {
+ comedi_error(dev,
+ "entries in chanlist must all have the same gain\n");
+ err++;
+ }
+ }
+ }
+
+ if (err)
+ return 5;
+
+ return 0;
+}
+
+static int das800_ai_do_cmd(comedi_device * dev, comedi_subdevice * s)
+{
+ int startChan, endChan, scan, gain;
+ int conv_bits;
+ unsigned long irq_flags;
+ comedi_async *async = s->async;
+
+ if (!dev->irq) {
+ comedi_error(dev,
+ "no irq assigned for das-800, cannot do hardware conversions");
+ return -1;
+ }
+
+ disable_das800(dev);
+
+ /* set channel scan limits */
+ startChan = CR_CHAN(async->cmd.chanlist[0]);
+ endChan = (startChan + async->cmd.chanlist_len - 1) % 8;
+ scan = (endChan << 3) | startChan;
+
+ comedi_spin_lock_irqsave(&dev->spinlock, irq_flags);
+ outb(SCAN_LIMITS, dev->iobase + DAS800_GAIN); /* select base address + 2 to be scan limits register */
+ outb(scan, dev->iobase + DAS800_SCAN_LIMITS); /* set scan limits */
+ comedi_spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+
+ /* set gain */
+ gain = CR_RANGE(async->cmd.chanlist[0]);
+ if (thisboard->resolution == 12 && gain > 0)
+ gain += 0x7;
+ gain &= 0xf;
+ outb(gain, dev->iobase + DAS800_GAIN);
+
+ switch (async->cmd.stop_src) {
+ case TRIG_COUNT:
+ devpriv->count = async->cmd.stop_arg * async->cmd.chanlist_len;
+ devpriv->forever = 0;
+ break;
+ case TRIG_NONE:
+ devpriv->forever = 1;
+ devpriv->count = 0;
+ break;
+ default:
+ break;
+ }
+
+ /* enable auto channel scan, send interrupts on end of conversion
+ * and set clock source to internal or external
+ */
+ conv_bits = 0;
+ conv_bits |= EACS | IEOC;
+ if (async->cmd.start_src == TRIG_EXT)
+ conv_bits |= DTEN;
+ switch (async->cmd.convert_src) {
+ case TRIG_TIMER:
+ conv_bits |= CASC | ITE;
+ /* set conversion frequency */
+ i8253_cascade_ns_to_timer_2div(TIMER_BASE, &(devpriv->divisor1),
+ &(devpriv->divisor2), &(async->cmd.convert_arg),
+ async->cmd.flags & TRIG_ROUND_MASK);
+ if (das800_set_frequency(dev) < 0) {
+ comedi_error(dev, "Error setting up counters");
+ return -1;
+ }
+ break;
+ case TRIG_EXT:
+ break;
+ default:
+ break;
+ }
+
+ comedi_spin_lock_irqsave(&dev->spinlock, irq_flags);
+ outb(CONV_CONTROL, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be conversion control register */
+ outb(conv_bits, dev->iobase + DAS800_CONV_CONTROL);
+ comedi_spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+ async->events = 0;
+ enable_das800(dev);
+ return 0;
+}
+
+static int das800_ai_rinsn(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ int i, n;
+ int chan;
+ int range;
+ int lsb, msb;
+ int timeout = 1000;
+ unsigned long irq_flags;
+
+ disable_das800(dev); /* disable hardware conversions (enables software conversions) */
+
+ /* set multiplexer */
+ chan = CR_CHAN(insn->chanspec);
+
+ comedi_spin_lock_irqsave(&dev->spinlock, irq_flags);
+ outb(CONTROL1, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be control register 1 */
+ outb(chan | devpriv->do_bits, dev->iobase + DAS800_CONTROL1);
+ comedi_spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+
+ /* set gain / range */
+ range = CR_RANGE(insn->chanspec);
+ if (thisboard->resolution == 12 && range)
+ range += 0x7;
+ range &= 0xf;
+ outb(range, dev->iobase + DAS800_GAIN);
+
+ comedi_udelay(5);
+
+ for (n = 0; n < insn->n; n++) {
+ /* trigger conversion */
+ outb_p(0, dev->iobase + DAS800_MSB);
+
+ for (i = 0; i < timeout; i++) {
+ if (!(inb(dev->iobase + DAS800_STATUS) & BUSY))
+ break;
+ }
+ if (i == timeout) {
+ comedi_error(dev, "timeout");
+ return -ETIME;
+ }
+ lsb = inb(dev->iobase + DAS800_LSB);
+ msb = inb(dev->iobase + DAS800_MSB);
+ if (thisboard->resolution == 12) {
+ data[n] = (lsb >> 4) & 0xff;
+ data[n] |= (msb << 4);
+ } else {
+ data[n] = (msb << 8) | lsb;
+ }
+ }
+
+ return n;
+}
+
+static int das800_di_rbits(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ lsampl_t bits;
+
+ bits = inb(dev->iobase + DAS800_STATUS) >> 4;
+ bits &= 0x7;
+ data[1] = bits;
+ data[0] = 0;
+
+ return 2;
+}
+
+static int das800_do_wbits(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ int wbits;
+ unsigned long irq_flags;
+
+ // only set bits that have been masked
+ data[0] &= 0xf;
+ wbits = devpriv->do_bits >> 4;
+ wbits &= ~data[0];
+ wbits |= data[0] & data[1];
+ devpriv->do_bits = wbits << 4;
+
+ comedi_spin_lock_irqsave(&dev->spinlock, irq_flags);
+ outb(CONTROL1, dev->iobase + DAS800_GAIN); /* select dev->iobase + 2 to be control register 1 */
+ outb(devpriv->do_bits | CONTROL1_INTE, dev->iobase + DAS800_CONTROL1);
+ comedi_spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+
+ data[1] = wbits;
+
+ return 2;
+}
+
+/* loads counters with divisor1, divisor2 from private structure */
+static int das800_set_frequency(comedi_device * dev)
+{
+ int err = 0;
+
+ if (i8254_load(dev->iobase + DAS800_8254, 0, 1, devpriv->divisor1, 2))
+ err++;
+ if (i8254_load(dev->iobase + DAS800_8254, 0, 2, devpriv->divisor2, 2))
+ err++;
+ if (err)
+ return -1;
+
+ return 0;
+}
projects / openwrt / staging / blogic.git / commitdiff