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path: root/drivers/staging/comedi/drivers/das800.c
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Diffstat (limited to 'drivers/staging/comedi/drivers/das800.c')
-rw-r--r--drivers/staging/comedi/drivers/das800.c796
1 files changed, 796 insertions, 0 deletions
diff --git a/drivers/staging/comedi/drivers/das800.c b/drivers/staging/comedi/drivers/das800.c
new file mode 100644
index 00000000..9ce6cbcc
--- /dev/null
+++ b/drivers/staging/comedi/drivers/das800.c
@@ -0,0 +1,796 @@
+/*
+ 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 <linux/interrupt.h>
+#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 /* cio-das802/16 fifo overflow */
+#define CIO_ENHF 0x90 /* cio-das802/16 fifo half full int ena */
+#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
+
+#define DAS802_16_HALF_FIFO_SZ 128
+
+struct das800_board {
+ const char *name;
+ int ai_speed;
+ const struct comedi_lrange *ai_range;
+ int resolution;
+};
+
+static const struct comedi_lrange range_das801_ai = {
+ 9, {
+ BIP_RANGE(5),
+ BIP_RANGE(10),
+ UNI_RANGE(10),
+ BIP_RANGE(0.5),
+ UNI_RANGE(1),
+ BIP_RANGE(0.05),
+ UNI_RANGE(0.1),
+ BIP_RANGE(0.01),
+ UNI_RANGE(0.02)
+ }
+};
+
+static const struct comedi_lrange range_cio_das801_ai = {
+ 9, {
+ BIP_RANGE(5),
+ BIP_RANGE(10),
+ UNI_RANGE(10),
+ BIP_RANGE(0.5),
+ UNI_RANGE(1),
+ BIP_RANGE(0.05),
+ UNI_RANGE(0.1),
+ BIP_RANGE(0.005),
+ UNI_RANGE(0.01)
+ }
+};
+
+static const struct comedi_lrange range_das802_ai = {
+ 9, {
+ BIP_RANGE(5),
+ BIP_RANGE(10),
+ UNI_RANGE(10),
+ BIP_RANGE(2.5),
+ UNI_RANGE(5),
+ BIP_RANGE(1.25),
+ UNI_RANGE(2.5),
+ BIP_RANGE(0.625),
+ UNI_RANGE(1.25)
+ }
+};
+
+static const struct comedi_lrange range_das80216_ai = {
+ 8, {
+ BIP_RANGE(10),
+ UNI_RANGE(10),
+ BIP_RANGE(5),
+ UNI_RANGE(5),
+ BIP_RANGE(2.5),
+ UNI_RANGE(2.5),
+ BIP_RANGE(1.25),
+ UNI_RANGE(1.25)
+ }
+};
+
+enum das800_boardinfo {
+ BOARD_DAS800,
+ BOARD_CIODAS800,
+ BOARD_DAS801,
+ BOARD_CIODAS801,
+ BOARD_DAS802,
+ BOARD_CIODAS802,
+ BOARD_CIODAS80216,
+};
+
+static const struct das800_board das800_boards[] = {
+ [BOARD_DAS800] = {
+ .name = "das-800",
+ .ai_speed = 25000,
+ .ai_range = &range_bipolar5,
+ .resolution = 12,
+ },
+ [BOARD_CIODAS800] = {
+ .name = "cio-das800",
+ .ai_speed = 20000,
+ .ai_range = &range_bipolar5,
+ .resolution = 12,
+ },
+ [BOARD_DAS801] = {
+ .name = "das-801",
+ .ai_speed = 25000,
+ .ai_range = &range_das801_ai,
+ .resolution = 12,
+ },
+ [BOARD_CIODAS801] = {
+ .name = "cio-das801",
+ .ai_speed = 20000,
+ .ai_range = &range_cio_das801_ai,
+ .resolution = 12,
+ },
+ [BOARD_DAS802] = {
+ .name = "das-802",
+ .ai_speed = 25000,
+ .ai_range = &range_das802_ai,
+ .resolution = 12,
+ },
+ [BOARD_CIODAS802] = {
+ .name = "cio-das802",
+ .ai_speed = 20000,
+ .ai_range = &range_das802_ai,
+ .resolution = 12,
+ },
+ [BOARD_CIODAS80216] = {
+ .name = "cio-das802/16",
+ .ai_speed = 10000,
+ .ai_range = &range_das80216_ai,
+ .resolution = 16,
+ },
+};
+
+struct das800_private {
+ unsigned int count; /* number of data points left to be taken */
+ unsigned int divisor1; /* counter 1 value for timed conversions */
+ unsigned int divisor2; /* counter 2 value for timed conversions */
+ unsigned int do_bits; /* digital output bits */
+ bool forever; /* flag that we should take data forever */
+};
+
+static void das800_ind_write(struct comedi_device *dev,
+ unsigned val, unsigned reg)
+{
+ /*
+ * Select dev->iobase + 2 to be desired register
+ * then write to that register.
+ */
+ outb(reg, dev->iobase + DAS800_GAIN);
+ outb(val, dev->iobase + 2);
+}
+
+static unsigned das800_ind_read(struct comedi_device *dev, unsigned reg)
+{
+ /*
+ * Select dev->iobase + 7 to be desired register
+ * then read from that register.
+ */
+ outb(reg, dev->iobase + DAS800_GAIN);
+ return inb(dev->iobase + 7);
+}
+
+static void das800_enable(struct comedi_device *dev)
+{
+ const struct das800_board *thisboard = comedi_board(dev);
+ struct das800_private *devpriv = dev->private;
+ unsigned long irq_flags;
+
+ 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);
+ /* enable hardware triggering */
+ das800_ind_write(dev, CONV_HCEN, CONV_CONTROL);
+ /* enable card's interrupt */
+ das800_ind_write(dev, CONTROL1_INTE | devpriv->do_bits, CONTROL1);
+ spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+}
+
+static void das800_disable(struct comedi_device *dev)
+{
+ unsigned long irq_flags;
+
+ spin_lock_irqsave(&dev->spinlock, irq_flags);
+ /* disable hardware triggering of conversions */
+ das800_ind_write(dev, 0x0, CONV_CONTROL);
+ spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+}
+
+static int das800_set_frequency(struct comedi_device *dev)
+{
+ struct das800_private *devpriv = dev->private;
+ 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;
+}
+
+static int das800_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
+{
+ struct das800_private *devpriv = dev->private;
+
+ devpriv->forever = false;
+ devpriv->count = 0;
+ das800_disable(dev);
+ return 0;
+}
+
+static int das800_ai_do_cmdtest(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_cmd *cmd)
+{
+ const struct das800_board *thisboard = comedi_board(dev);
+ struct das800_private *devpriv = dev->private;
+ int err = 0;
+
+ /* Step 1 : check if triggers are trivially valid */
+
+ err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_EXT);
+ err |= cfc_check_trigger_src(&cmd->scan_begin_src, TRIG_FOLLOW);
+ err |= cfc_check_trigger_src(&cmd->convert_src, TRIG_TIMER | TRIG_EXT);
+ err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
+ err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
+
+ if (err)
+ return 1;
+
+ /* Step 2a : make sure trigger sources are unique */
+
+ err |= cfc_check_trigger_is_unique(cmd->start_src);
+ err |= cfc_check_trigger_is_unique(cmd->convert_src);
+ err |= cfc_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 |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
+
+ if (cmd->convert_src == TRIG_TIMER)
+ err |= cfc_check_trigger_arg_min(&cmd->convert_arg,
+ thisboard->ai_speed);
+
+ err |= cfc_check_trigger_arg_min(&cmd->chanlist_len, 1);
+ err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len);
+
+ if (cmd->stop_src == TRIG_COUNT)
+ err |= cfc_check_trigger_arg_min(&cmd->stop_arg, 1);
+ else /* TRIG_NONE */
+ err |= cfc_check_trigger_arg_is(&cmd->stop_arg, 0);
+
+ if (err)
+ return 3;
+
+ /* step 4: fix up any arguments */
+
+ if (cmd->convert_src == TRIG_TIMER) {
+ int 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) {
+ unsigned int chan = CR_CHAN(cmd->chanlist[0]);
+ unsigned int range = CR_RANGE(cmd->chanlist[0]);
+ unsigned int next;
+ int i;
+
+ for (i = 1; i < cmd->chanlist_len; i++) {
+ next = cmd->chanlist[i];
+ if (CR_CHAN(next) != (chan + i) % N_CHAN_AI) {
+ dev_err(dev->class_dev,
+ "chanlist must be consecutive, counting upwards\n");
+ err++;
+ }
+ if (CR_RANGE(next) != range) {
+ dev_err(dev->class_dev,
+ "chanlist must all have the same gain\n");
+ err++;
+ }
+ }
+ }
+
+ if (err)
+ return 5;
+
+ return 0;
+}
+
+static int das800_ai_do_cmd(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ const struct das800_board *thisboard = comedi_board(dev);
+ struct das800_private *devpriv = dev->private;
+ struct comedi_async *async = s->async;
+ unsigned int gain = CR_RANGE(async->cmd.chanlist[0]);
+ unsigned int start_chan = CR_CHAN(async->cmd.chanlist[0]);
+ unsigned int end_chan = (start_chan + async->cmd.chanlist_len - 1) % 8;
+ unsigned int scan_chans = (end_chan << 3) | start_chan;
+ int conv_bits;
+ unsigned long irq_flags;
+
+ das800_disable(dev);
+
+ spin_lock_irqsave(&dev->spinlock, irq_flags);
+ /* set scan limits */
+ das800_ind_write(dev, scan_chans, SCAN_LIMITS);
+ spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+
+ /* set gain */
+ 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 = false;
+ break;
+ case TRIG_NONE:
+ devpriv->forever = true;
+ 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 */
+ if (das800_set_frequency(dev) < 0) {
+ comedi_error(dev, "Error setting up counters");
+ return -1;
+ }
+ break;
+ case TRIG_EXT:
+ break;
+ default:
+ break;
+ }
+
+ spin_lock_irqsave(&dev->spinlock, irq_flags);
+ das800_ind_write(dev, conv_bits, CONV_CONTROL);
+ spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+
+ async->events = 0;
+ das800_enable(dev);
+ return 0;
+}
+
+static unsigned int das800_ai_get_sample(struct comedi_device *dev)
+{
+ unsigned int lsb = inb(dev->iobase + DAS800_LSB);
+ unsigned int msb = inb(dev->iobase + DAS800_MSB);
+
+ return (msb << 8) | lsb;
+}
+
+static irqreturn_t das800_interrupt(int irq, void *d)
+{
+ struct comedi_device *dev = d;
+ struct das800_private *devpriv = dev->private;
+ struct comedi_subdevice *s = dev->read_subdev;
+ struct comedi_async *async = s ? s->async : NULL;
+ unsigned long irq_flags;
+ unsigned int status;
+ unsigned int val;
+ bool fifo_empty;
+ bool fifo_overflow;
+ int i;
+
+ status = inb(dev->iobase + DAS800_STATUS);
+ if (!(status & IRQ))
+ return IRQ_NONE;
+ if (!dev->attached)
+ return IRQ_HANDLED;
+
+ spin_lock_irqsave(&dev->spinlock, irq_flags);
+ status = das800_ind_read(dev, CONTROL1) & STATUS2_HCEN;
+ /*
+ * Don't release spinlock yet since we want to make sure
+ * no one else disables hardware conversions.
+ */
+
+ /* if hardware conversions are not enabled, then quit */
+ if (status == 0) {
+ spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+ return IRQ_HANDLED;
+ }
+
+ for (i = 0; i < DAS802_16_HALF_FIFO_SZ; i++) {
+ val = das800_ai_get_sample(dev);
+ if (s->maxdata == 0x0fff) {
+ fifo_empty = !!(val & FIFO_EMPTY);
+ fifo_overflow = !!(val & FIFO_OVF);
+ } else {
+ /* cio-das802/16 has no fifo empty status bit */
+ fifo_empty = false;
+ fifo_overflow = !!(inb(dev->iobase + DAS800_GAIN) &
+ CIO_FFOV);
+ }
+ if (fifo_empty || fifo_overflow)
+ break;
+
+ if (s->maxdata == 0x0fff)
+ val >>= 4; /* 12-bit sample */
+
+ /* if there are more data points to collect */
+ if (devpriv->count > 0 || devpriv->forever) {
+ /* write data point to buffer */
+ cfc_write_to_buffer(s, val & s->maxdata);
+ devpriv->count--;
+ }
+ }
+ async->events |= COMEDI_CB_BLOCK;
+
+ if (fifo_overflow) {
+ spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+ das800_cancel(dev, s);
+ async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA;
+ comedi_event(dev, s);
+ async->events = 0;
+ return IRQ_HANDLED;
+ }
+
+ if (devpriv->count > 0 || devpriv->forever) {
+ /* Re-enable card's interrupt.
+ * We already have spinlock, so indirect addressing is safe */
+ das800_ind_write(dev, CONTROL1_INTE | devpriv->do_bits,
+ CONTROL1);
+ spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+ } else {
+ /* otherwise, stop taking data */
+ spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+ das800_disable(dev);
+ async->events |= COMEDI_CB_EOA;
+ }
+ comedi_event(dev, s);
+ async->events = 0;
+ return IRQ_HANDLED;
+}
+
+static int das800_wait_for_conv(struct comedi_device *dev, int timeout)
+{
+ int i;
+
+ for (i = 0; i < timeout; i++) {
+ if (!(inb(dev->iobase + DAS800_STATUS) & BUSY))
+ return 0;
+ }
+ return -ETIME;
+}
+
+static int das800_ai_insn_read(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct das800_private *devpriv = dev->private;
+ unsigned int chan = CR_CHAN(insn->chanspec);
+ unsigned int range = CR_RANGE(insn->chanspec);
+ unsigned long irq_flags;
+ unsigned int val;
+ int ret;
+ int i;
+
+ das800_disable(dev);
+
+ /* set multiplexer */
+ spin_lock_irqsave(&dev->spinlock, irq_flags);
+ das800_ind_write(dev, chan | devpriv->do_bits, CONTROL1);
+ spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+
+ /* set gain / range */
+ if (s->maxdata == 0x0fff && range)
+ range += 0x7;
+ range &= 0xf;
+ outb(range, dev->iobase + DAS800_GAIN);
+
+ udelay(5);
+
+ for (i = 0; i < insn->n; i++) {
+ /* trigger conversion */
+ outb_p(0, dev->iobase + DAS800_MSB);
+
+ ret = das800_wait_for_conv(dev, 1000);
+ if (ret)
+ return ret;
+
+ val = das800_ai_get_sample(dev);
+ if (s->maxdata == 0x0fff)
+ val >>= 4; /* 12-bit sample */
+ data[i] = val & s->maxdata;
+ }
+
+ return insn->n;
+}
+
+static int das800_di_insn_bits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ data[1] = (inb(dev->iobase + DAS800_STATUS) >> 4) & 0x7;
+
+ return insn->n;
+}
+
+static int das800_do_insn_bits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct das800_private *devpriv = dev->private;
+ unsigned int mask = data[0];
+ unsigned int bits = data[1];
+ unsigned long irq_flags;
+
+ if (mask) {
+ s->state &= ~mask;
+ s->state |= (bits & mask);
+ devpriv->do_bits = s->state << 4;
+
+ spin_lock_irqsave(&dev->spinlock, irq_flags);
+ das800_ind_write(dev, CONTROL1_INTE | devpriv->do_bits,
+ CONTROL1);
+ spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+ }
+
+ data[1] = s->state;
+
+ return insn->n;
+}
+
+static int das800_probe(struct comedi_device *dev)
+{
+ const struct das800_board *thisboard = comedi_board(dev);
+ int board = thisboard ? thisboard - das800_boards : -EINVAL;
+ int id_bits;
+ unsigned long irq_flags;
+
+ spin_lock_irqsave(&dev->spinlock, irq_flags);
+ id_bits = das800_ind_read(dev, ID) & 0x3;
+ spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+
+ switch (id_bits) {
+ case 0x0:
+ if (board == BOARD_DAS800 || board == BOARD_CIODAS800)
+ break;
+ dev_dbg(dev->class_dev, "Board model (probed): DAS-800\n");
+ board = BOARD_DAS800;
+ break;
+ case 0x2:
+ if (board == BOARD_DAS801 || board == BOARD_CIODAS801)
+ break;
+ dev_dbg(dev->class_dev, "Board model (probed): DAS-801\n");
+ board = BOARD_DAS801;
+ break;
+ case 0x3:
+ if (board == BOARD_DAS802 || board == BOARD_CIODAS802 ||
+ board == BOARD_CIODAS80216)
+ break;
+ dev_dbg(dev->class_dev, "Board model (probed): DAS-802\n");
+ board = BOARD_DAS802;
+ break;
+ default:
+ dev_dbg(dev->class_dev, "Board model: 0x%x (unknown)\n",
+ id_bits);
+ board = -EINVAL;
+ break;
+ }
+ return board;
+}
+
+static int das800_attach(struct comedi_device *dev, struct comedi_devconfig *it)
+{
+ const struct das800_board *thisboard = comedi_board(dev);
+ struct das800_private *devpriv;
+ struct comedi_subdevice *s;
+ unsigned int irq = it->options[1];
+ unsigned long irq_flags;
+ int board;
+ int ret;
+
+ devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
+ if (!devpriv)
+ return -ENOMEM;
+ dev->private = devpriv;
+
+ ret = comedi_request_region(dev, it->options[0], DAS800_SIZE);
+ if (ret)
+ return ret;
+
+ board = das800_probe(dev);
+ if (board < 0) {
+ dev_dbg(dev->class_dev, "unable to determine board type\n");
+ return -ENODEV;
+ }
+ dev->board_ptr = das800_boards + board;
+ thisboard = comedi_board(dev);
+ dev->board_name = thisboard->name;
+
+ if (irq > 1 && irq <= 7) {
+ ret = request_irq(irq, das800_interrupt, 0, dev->board_name,
+ dev);
+ if (ret == 0)
+ dev->irq = irq;
+ }
+
+ ret = comedi_alloc_subdevices(dev, 3);
+ if (ret)
+ return ret;
+
+ /* Analog Input subdevice */
+ s = &dev->subdevices[0];
+ dev->read_subdev = s;
+ s->type = COMEDI_SUBD_AI;
+ s->subdev_flags = SDF_READABLE | SDF_GROUND;
+ s->n_chan = 8;
+ s->maxdata = (1 << thisboard->resolution) - 1;
+ s->range_table = thisboard->ai_range;
+ s->insn_read = das800_ai_insn_read;
+ if (dev->irq) {
+ s->subdev_flags |= SDF_CMD_READ;
+ s->len_chanlist = 8;
+ s->do_cmdtest = das800_ai_do_cmdtest;
+ s->do_cmd = das800_ai_do_cmd;
+ s->cancel = das800_cancel;
+ }
+
+ /* Digital Input subdevice */
+ 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_insn_bits;
+
+ /* Digital Output subdevice */
+ 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_insn_bits;
+
+ das800_disable(dev);
+
+ /* initialize digital out channels */
+ spin_lock_irqsave(&dev->spinlock, irq_flags);
+ das800_ind_write(dev, CONTROL1_INTE | devpriv->do_bits, CONTROL1);
+ spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+
+ return 0;
+};
+
+static struct comedi_driver driver_das800 = {
+ .driver_name = "das800",
+ .module = THIS_MODULE,
+ .attach = das800_attach,
+ .detach = comedi_legacy_detach,
+ .num_names = ARRAY_SIZE(das800_boards),
+ .board_name = &das800_boards[0].name,
+ .offset = sizeof(struct das800_board),
+};
+module_comedi_driver(driver_das800);
+
+MODULE_AUTHOR("Comedi http://www.comedi.org");
+MODULE_DESCRIPTION("Comedi low-level driver");
+MODULE_LICENSE("GPL");
generated by cgit v1.3.1 (git 2.54.0) at 2026-08-15 20:04:47 +0000