--- /dev/null
+/*
+ comedi/drivers/das1800.c
+ Driver for Keitley das1700/das1800 series boards
+ 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.
+*/
+/*
+Driver: das1800
+Description: Keithley Metrabyte DAS1800 (& compatibles)
+Author: Frank Mori Hess <fmhess@users.sourceforge.net>
+Devices: [Keithley Metrabyte] DAS-1701ST (das-1701st),
+ DAS-1701ST-DA (das-1701st-da), DAS-1701/AO (das-1701ao),
+ DAS-1702ST (das-1702st), DAS-1702ST-DA (das-1702st-da),
+ DAS-1702HR (das-1702hr), DAS-1702HR-DA (das-1702hr-da),
+ DAS-1702/AO (das-1702ao), DAS-1801ST (das-1801st),
+ DAS-1801ST-DA (das-1801st-da), DAS-1801HC (das-1801hc),
+ DAS-1801AO (das-1801ao), DAS-1802ST (das-1802st),
+ DAS-1802ST-DA (das-1802st-da), DAS-1802HR (das-1802hr),
+ DAS-1802HR-DA (das-1802hr-da), DAS-1802HC (das-1802hc),
+ DAS-1802AO (das-1802ao)
+Status: works
+
+The waveform analog output on the 'ao' cards is not supported.
+If you need it, send me (Frank Hess) an email.
+
+Configuration options:
+ [0] - I/O port base address
+ [1] - IRQ (optional, required for timed or externally triggered conversions)
+ [2] - DMA0 (optional, requires irq)
+ [3] - DMA1 (optional, requires irq and dma0)
+*/
+/*
+
+This driver supports the following Keithley boards:
+
+das-1701st
+das-1701st-da
+das-1701ao
+das-1702st
+das-1702st-da
+das-1702hr
+das-1702hr-da
+das-1702ao
+das-1801st
+das-1801st-da
+das-1801hc
+das-1801ao
+das-1802st
+das-1802st-da
+das-1802hr
+das-1802hr-da
+das-1802hc
+das-1802ao
+
+Options:
+ [0] - base io address
+ [1] - irq (optional, required for timed or externally triggered conversions)
+ [2] - dma0 (optional, requires irq)
+ [3] - dma1 (optional, requires irq and dma0)
+
+irq can be omitted, although the cmd interface will not work without it.
+
+analog input cmd triggers supported:
+ start_src: TRIG_NOW | TRIG_EXT
+ scan_begin_src: TRIG_FOLLOW | TRIG_TIMER | TRIG_EXT
+ scan_end_src: TRIG_COUNT
+ convert_src: TRIG_TIMER | TRIG_EXT (TRIG_EXT requires scan_begin_src == TRIG_FOLLOW)
+ stop_src: TRIG_COUNT | TRIG_EXT | TRIG_NONE
+
+scan_begin_src triggers TRIG_TIMER and TRIG_EXT use the card's
+'burst mode' which limits the valid conversion time to 64 microseconds
+(convert_arg <= 64000). This limitation does not apply if scan_begin_src
+is TRIG_FOLLOW.
+
+NOTES:
+Only the DAS-1801ST has been tested by me.
+Unipolar and bipolar ranges cannot be mixed in the channel/gain list.
+
+TODO:
+ Make it automatically allocate irq and dma channels if they are not specified
+ Add support for analog out on 'ao' cards
+ read insn for analog out
+*/
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+
+#include "../comedidev.h"
+
+#include "comedi_isadma.h"
+#include "comedi_8254.h"
+
+/* misc. defines */
+#define DAS1800_SIZE 16 /* uses 16 io addresses */
+#define FIFO_SIZE 1024 /* 1024 sample fifo */
+#define UNIPOLAR 0x4 /* bit that determines whether input range is uni/bipolar */
+#define DMA_BUF_SIZE 0x1ff00 /* size in bytes of dma buffers */
+
+/* Registers for the das1800 */
+#define DAS1800_FIFO 0x0
+#define DAS1800_QRAM 0x0
+#define DAS1800_DAC 0x0
+#define DAS1800_SELECT 0x2
+#define ADC 0x0
+#define QRAM 0x1
+#define DAC(a) (0x2 + a)
+#define DAS1800_DIGITAL 0x3
+#define DAS1800_CONTROL_A 0x4
+#define FFEN 0x1
+#define CGEN 0x4
+#define CGSL 0x8
+#define TGEN 0x10
+#define TGSL 0x20
+#define ATEN 0x80
+#define DAS1800_CONTROL_B 0x5
+#define DMA_CH5 0x1
+#define DMA_CH6 0x2
+#define DMA_CH7 0x3
+#define DMA_CH5_CH6 0x5
+#define DMA_CH6_CH7 0x6
+#define DMA_CH7_CH5 0x7
+#define DMA_ENABLED 0x3 /* mask used to determine if dma is enabled */
+#define DMA_DUAL 0x4
+#define IRQ3 0x8
+#define IRQ5 0x10
+#define IRQ7 0x18
+#define IRQ10 0x28
+#define IRQ11 0x30
+#define IRQ15 0x38
+#define FIMD 0x40
+#define DAS1800_CONTROL_C 0X6
+#define IPCLK 0x1
+#define XPCLK 0x3
+#define BMDE 0x4
+#define CMEN 0x8
+#define UQEN 0x10
+#define SD 0x40
+#define UB 0x80
+#define DAS1800_STATUS 0x7
+/* bits that prevent interrupt status bits (and CVEN) from being cleared on write */
+#define CLEAR_INTR_MASK (CVEN_MASK | 0x1f)
+#define INT 0x1
+#define DMATC 0x2
+#define CT0TC 0x8
+#define OVF 0x10
+#define FHF 0x20
+#define FNE 0x40
+#define CVEN_MASK 0x40 /* masks CVEN on write */
+#define CVEN 0x80
+#define DAS1800_BURST_LENGTH 0x8
+#define DAS1800_BURST_RATE 0x9
+#define DAS1800_QRAM_ADDRESS 0xa
+#define DAS1800_COUNTER 0xc
+
+#define IOBASE2 0x400 /* offset of additional ioports used on 'ao' cards */
+
+enum {
+ das1701st, das1701st_da, das1702st, das1702st_da, das1702hr,
+ das1702hr_da,
+ das1701ao, das1702ao, das1801st, das1801st_da, das1802st, das1802st_da,
+ das1802hr, das1802hr_da, das1801hc, das1802hc, das1801ao, das1802ao
+};
+
+/* analog input ranges */
+static const struct comedi_lrange range_ai_das1801 = {
+ 8, {
+ BIP_RANGE(5),
+ BIP_RANGE(1),
+ BIP_RANGE(0.1),
+ BIP_RANGE(0.02),
+ UNI_RANGE(5),
+ UNI_RANGE(1),
+ UNI_RANGE(0.1),
+ UNI_RANGE(0.02)
+ }
+};
+
+static const struct comedi_lrange range_ai_das1802 = {
+ 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 das1800_board {
+ const char *name;
+ int ai_speed; /* max conversion period in nanoseconds */
+ int resolution; /* bits of ai resolution */
+ int qram_len; /* length of card's channel / gain queue */
+ int common; /* supports AREF_COMMON flag */
+ int do_n_chan; /* number of digital output channels */
+ int ao_ability; /* 0 == no analog out, 1 == basic analog out, 2 == waveform analog out */
+ int ao_n_chan; /* number of analog out channels */
+ const struct comedi_lrange *range_ai; /* available input ranges */
+};
+
+/* Warning: the maximum conversion speeds listed below are
+ * not always achievable depending on board setup (see
+ * user manual.)
+ */
+static const struct das1800_board das1800_boards[] = {
+ {
+ .name = "das-1701st",
+ .ai_speed = 6250,
+ .resolution = 12,
+ .qram_len = 256,
+ .common = 1,
+ .do_n_chan = 4,
+ .ao_ability = 0,
+ .ao_n_chan = 0,
+ .range_ai = &range_ai_das1801,
+ },
+ {
+ .name = "das-1701st-da",
+ .ai_speed = 6250,
+ .resolution = 12,
+ .qram_len = 256,
+ .common = 1,
+ .do_n_chan = 4,
+ .ao_ability = 1,
+ .ao_n_chan = 4,
+ .range_ai = &range_ai_das1801,
+ },
+ {
+ .name = "das-1702st",
+ .ai_speed = 6250,
+ .resolution = 12,
+ .qram_len = 256,
+ .common = 1,
+ .do_n_chan = 4,
+ .ao_ability = 0,
+ .ao_n_chan = 0,
+ .range_ai = &range_ai_das1802,
+ },
+ {
+ .name = "das-1702st-da",
+ .ai_speed = 6250,
+ .resolution = 12,
+ .qram_len = 256,
+ .common = 1,
+ .do_n_chan = 4,
+ .ao_ability = 1,
+ .ao_n_chan = 4,
+ .range_ai = &range_ai_das1802,
+ },
+ {
+ .name = "das-1702hr",
+ .ai_speed = 20000,
+ .resolution = 16,
+ .qram_len = 256,
+ .common = 1,
+ .do_n_chan = 4,
+ .ao_ability = 0,
+ .ao_n_chan = 0,
+ .range_ai = &range_ai_das1802,
+ },
+ {
+ .name = "das-1702hr-da",
+ .ai_speed = 20000,
+ .resolution = 16,
+ .qram_len = 256,
+ .common = 1,
+ .do_n_chan = 4,
+ .ao_ability = 1,
+ .ao_n_chan = 2,
+ .range_ai = &range_ai_das1802,
+ },
+ {
+ .name = "das-1701ao",
+ .ai_speed = 6250,
+ .resolution = 12,
+ .qram_len = 256,
+ .common = 1,
+ .do_n_chan = 4,
+ .ao_ability = 2,
+ .ao_n_chan = 2,
+ .range_ai = &range_ai_das1801,
+ },
+ {
+ .name = "das-1702ao",
+ .ai_speed = 6250,
+ .resolution = 12,
+ .qram_len = 256,
+ .common = 1,
+ .do_n_chan = 4,
+ .ao_ability = 2,
+ .ao_n_chan = 2,
+ .range_ai = &range_ai_das1802,
+ },
+ {
+ .name = "das-1801st",
+ .ai_speed = 3000,
+ .resolution = 12,
+ .qram_len = 256,
+ .common = 1,
+ .do_n_chan = 4,
+ .ao_ability = 0,
+ .ao_n_chan = 0,
+ .range_ai = &range_ai_das1801,
+ },
+ {
+ .name = "das-1801st-da",
+ .ai_speed = 3000,
+ .resolution = 12,
+ .qram_len = 256,
+ .common = 1,
+ .do_n_chan = 4,
+ .ao_ability = 0,
+ .ao_n_chan = 4,
+ .range_ai = &range_ai_das1801,
+ },
+ {
+ .name = "das-1802st",
+ .ai_speed = 3000,
+ .resolution = 12,
+ .qram_len = 256,
+ .common = 1,
+ .do_n_chan = 4,
+ .ao_ability = 0,
+ .ao_n_chan = 0,
+ .range_ai = &range_ai_das1802,
+ },
+ {
+ .name = "das-1802st-da",
+ .ai_speed = 3000,
+ .resolution = 12,
+ .qram_len = 256,
+ .common = 1,
+ .do_n_chan = 4,
+ .ao_ability = 1,
+ .ao_n_chan = 4,
+ .range_ai = &range_ai_das1802,
+ },
+ {
+ .name = "das-1802hr",
+ .ai_speed = 10000,
+ .resolution = 16,
+ .qram_len = 256,
+ .common = 1,
+ .do_n_chan = 4,
+ .ao_ability = 0,
+ .ao_n_chan = 0,
+ .range_ai = &range_ai_das1802,
+ },
+ {
+ .name = "das-1802hr-da",
+ .ai_speed = 10000,
+ .resolution = 16,
+ .qram_len = 256,
+ .common = 1,
+ .do_n_chan = 4,
+ .ao_ability = 1,
+ .ao_n_chan = 2,
+ .range_ai = &range_ai_das1802,
+ },
+ {
+ .name = "das-1801hc",
+ .ai_speed = 3000,
+ .resolution = 12,
+ .qram_len = 64,
+ .common = 0,
+ .do_n_chan = 8,
+ .ao_ability = 1,
+ .ao_n_chan = 2,
+ .range_ai = &range_ai_das1801,
+ },
+ {
+ .name = "das-1802hc",
+ .ai_speed = 3000,
+ .resolution = 12,
+ .qram_len = 64,
+ .common = 0,
+ .do_n_chan = 8,
+ .ao_ability = 1,
+ .ao_n_chan = 2,
+ .range_ai = &range_ai_das1802,
+ },
+ {
+ .name = "das-1801ao",
+ .ai_speed = 3000,
+ .resolution = 12,
+ .qram_len = 256,
+ .common = 1,
+ .do_n_chan = 4,
+ .ao_ability = 2,
+ .ao_n_chan = 2,
+ .range_ai = &range_ai_das1801,
+ },
+ {
+ .name = "das-1802ao",
+ .ai_speed = 3000,
+ .resolution = 12,
+ .qram_len = 256,
+ .common = 1,
+ .do_n_chan = 4,
+ .ao_ability = 2,
+ .ao_n_chan = 2,
+ .range_ai = &range_ai_das1802,
+ },
+};
+
+struct das1800_private {
+ struct comedi_isadma *dma;
+ int irq_dma_bits; /* bits for control register b */
+ /* dma bits for control register b, stored so that dma can be
+ * turned on and off */
+ int dma_bits;
+ uint16_t *fifo_buf; /* bounce buffer for analog input FIFO */
+ unsigned long iobase2; /* secondary io address used for analog out on 'ao' boards */
+ unsigned short ao_update_bits; /* remembers the last write to the
+ * 'update' dac */
+};
+
+/* analog out range for 'ao' boards */
+/*
+static const struct comedi_lrange range_ao_2 = {
+ 2, {
+ BIP_RANGE(10),
+ BIP_RANGE(5)
+ }
+};
+*/
+
+static inline uint16_t munge_bipolar_sample(const struct comedi_device *dev,
+ uint16_t sample)
+{
+ const struct das1800_board *thisboard = dev->board_ptr;
+
+ sample += 1 << (thisboard->resolution - 1);
+ return sample;
+}
+
+static void munge_data(struct comedi_device *dev, uint16_t *array,
+ unsigned int num_elements)
+{
+ unsigned int i;
+ int unipolar;
+
+ /* see if card is using a unipolar or bipolar range so we can munge data correctly */
+ unipolar = inb(dev->iobase + DAS1800_CONTROL_C) & UB;
+
+ /* convert to unsigned type if we are in a bipolar mode */
+ if (!unipolar) {
+ for (i = 0; i < num_elements; i++)
+ array[i] = munge_bipolar_sample(dev, array[i]);
+ }
+}
+
+static void das1800_handle_fifo_half_full(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ struct das1800_private *devpriv = dev->private;
+ unsigned int nsamples = comedi_nsamples_left(s, FIFO_SIZE / 2);
+
+ insw(dev->iobase + DAS1800_FIFO, devpriv->fifo_buf, nsamples);
+ munge_data(dev, devpriv->fifo_buf, nsamples);
+ comedi_buf_write_samples(s, devpriv->fifo_buf, nsamples);
+}
+
+static void das1800_handle_fifo_not_empty(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ struct comedi_cmd *cmd = &s->async->cmd;
+ unsigned short dpnt;
+ int unipolar;
+
+ unipolar = inb(dev->iobase + DAS1800_CONTROL_C) & UB;
+
+ while (inb(dev->iobase + DAS1800_STATUS) & FNE) {
+ dpnt = inw(dev->iobase + DAS1800_FIFO);
+ /* convert to unsigned type */
+ dpnt = munge_bipolar_sample(dev, dpnt);
+ comedi_buf_write_samples(s, &dpnt, 1);
+
+ if (cmd->stop_src == TRIG_COUNT &&
+ s->async->scans_done >= cmd->stop_arg)
+ break;
+ }
+}
+
+/* Utility function used by das1800_flush_dma() and das1800_handle_dma() */
+static void das1800_flush_dma_channel(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_isadma_desc *desc)
+{
+ unsigned int residue = comedi_isadma_disable(desc->chan);
+ unsigned int nbytes = desc->size - residue;
+ unsigned int nsamples;
+
+ /* figure out how many points to read */
+ nsamples = comedi_bytes_to_samples(s, nbytes);
+ nsamples = comedi_nsamples_left(s, nsamples);
+
+ munge_data(dev, desc->virt_addr, nsamples);
+ comedi_buf_write_samples(s, desc->virt_addr, nsamples);
+}
+
+/* flushes remaining data from board when external trigger has stopped acquisition
+ * and we are using dma transfers */
+static void das1800_flush_dma(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ struct das1800_private *devpriv = dev->private;
+ struct comedi_isadma *dma = devpriv->dma;
+ struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma];
+ const int dual_dma = devpriv->irq_dma_bits & DMA_DUAL;
+
+ das1800_flush_dma_channel(dev, s, desc);
+
+ if (dual_dma) {
+ /* switch to other channel and flush it */
+ dma->cur_dma = 1 - dma->cur_dma;
+ desc = &dma->desc[dma->cur_dma];
+ das1800_flush_dma_channel(dev, s, desc);
+ }
+
+ /* get any remaining samples in fifo */
+ das1800_handle_fifo_not_empty(dev, s);
+}
+
+static void das1800_handle_dma(struct comedi_device *dev,
+ struct comedi_subdevice *s, unsigned int status)
+{
+ struct das1800_private *devpriv = dev->private;
+ struct comedi_isadma *dma = devpriv->dma;
+ struct comedi_isadma_desc *desc = &dma->desc[dma->cur_dma];
+ const int dual_dma = devpriv->irq_dma_bits & DMA_DUAL;
+
+ das1800_flush_dma_channel(dev, s, desc);
+
+ /* re-enable dma channel */
+ comedi_isadma_program(desc);
+
+ if (status & DMATC) {
+ /* clear DMATC interrupt bit */
+ outb(CLEAR_INTR_MASK & ~DMATC, dev->iobase + DAS1800_STATUS);
+ /* switch dma channels for next time, if appropriate */
+ if (dual_dma)
+ dma->cur_dma = 1 - dma->cur_dma;
+ }
+}
+
+static int das1800_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
+{
+ struct das1800_private *devpriv = dev->private;
+ struct comedi_isadma *dma = devpriv->dma;
+ struct comedi_isadma_desc *desc;
+ int i;
+
+ outb(0x0, dev->iobase + DAS1800_STATUS); /* disable conversions */
+ outb(0x0, dev->iobase + DAS1800_CONTROL_B); /* disable interrupts and dma */
+ outb(0x0, dev->iobase + DAS1800_CONTROL_A); /* disable and clear fifo and stop triggering */
+
+ for (i = 0; i < 2; i++) {
+ desc = &dma->desc[i];
+ if (desc->chan)
+ comedi_isadma_disable(desc->chan);
+ }
+
+ return 0;
+}
+
+/* the guts of the interrupt handler, that is shared with das1800_ai_poll */
+static void das1800_ai_handler(struct comedi_device *dev)
+{
+ struct das1800_private *devpriv = dev->private;
+ struct comedi_subdevice *s = dev->read_subdev;
+ struct comedi_async *async = s->async;
+ struct comedi_cmd *cmd = &async->cmd;
+ unsigned int status = inb(dev->iobase + DAS1800_STATUS);
+
+ /* select adc for base address + 0 */
+ outb(ADC, dev->iobase + DAS1800_SELECT);
+ /* dma buffer full */
+ if (devpriv->irq_dma_bits & DMA_ENABLED) {
+ /* look for data from dma transfer even if dma terminal count hasn't happened yet */
+ das1800_handle_dma(dev, s, status);
+ } else if (status & FHF) { /* if fifo half full */
+ das1800_handle_fifo_half_full(dev, s);
+ } else if (status & FNE) { /* if fifo not empty */
+ das1800_handle_fifo_not_empty(dev, s);
+ }
+
+ /* if the card's fifo has overflowed */
+ if (status & OVF) {
+ /* clear OVF interrupt bit */
+ outb(CLEAR_INTR_MASK & ~OVF, dev->iobase + DAS1800_STATUS);
+ dev_err(dev->class_dev, "FIFO overflow\n");
+ async->events |= COMEDI_CB_ERROR;
+ comedi_handle_events(dev, s);
+ return;
+ }
+ /* stop taking data if appropriate */
+ /* stop_src TRIG_EXT */
+ if (status & CT0TC) {
+ /* clear CT0TC interrupt bit */
+ outb(CLEAR_INTR_MASK & ~CT0TC, dev->iobase + DAS1800_STATUS);
+ /* make sure we get all remaining data from board before quitting */
+ if (devpriv->irq_dma_bits & DMA_ENABLED)
+ das1800_flush_dma(dev, s);
+ else
+ das1800_handle_fifo_not_empty(dev, s);
+ async->events |= COMEDI_CB_EOA;
+ } else if (cmd->stop_src == TRIG_COUNT &&
+ async->scans_done >= cmd->stop_arg) {
+ async->events |= COMEDI_CB_EOA;
+ }
+
+ comedi_handle_events(dev, s);
+}
+
+static int das1800_ai_poll(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ unsigned long flags;
+
+ /* prevent race with interrupt handler */
+ spin_lock_irqsave(&dev->spinlock, flags);
+ das1800_ai_handler(dev);
+ spin_unlock_irqrestore(&dev->spinlock, flags);
+
+ return comedi_buf_n_bytes_ready(s);
+}
+
+static irqreturn_t das1800_interrupt(int irq, void *d)
+{
+ struct comedi_device *dev = d;
+ unsigned int status;
+
+ if (!dev->attached) {
+ dev_err(dev->class_dev, "premature interrupt\n");
+ return IRQ_HANDLED;
+ }
+
+ /* Prevent race with das1800_ai_poll() on multi processor systems.
+ * Also protects indirect addressing in das1800_ai_handler */
+ spin_lock(&dev->spinlock);
+ status = inb(dev->iobase + DAS1800_STATUS);
+
+ /* if interrupt was not caused by das-1800 */
+ if (!(status & INT)) {
+ spin_unlock(&dev->spinlock);
+ return IRQ_NONE;
+ }
+ /* clear the interrupt status bit INT */
+ outb(CLEAR_INTR_MASK & ~INT, dev->iobase + DAS1800_STATUS);
+ /* handle interrupt */
+ das1800_ai_handler(dev);
+
+ spin_unlock(&dev->spinlock);
+ return IRQ_HANDLED;
+}
+
+/* converts requested conversion timing to timing compatible with
+ * hardware, used only when card is in 'burst mode'
+ */
+static unsigned int burst_convert_arg(unsigned int convert_arg, int flags)
+{
+ unsigned int micro_sec;
+
+ /* in burst mode, the maximum conversion time is 64 microseconds */
+ if (convert_arg > 64000)
+ convert_arg = 64000;
+
+ /* the conversion time must be an integral number of microseconds */
+ switch (flags & CMDF_ROUND_MASK) {
+ case CMDF_ROUND_NEAREST:
+ default:
+ micro_sec = (convert_arg + 500) / 1000;
+ break;
+ case CMDF_ROUND_DOWN:
+ micro_sec = convert_arg / 1000;
+ break;
+ case CMDF_ROUND_UP:
+ micro_sec = (convert_arg - 1) / 1000 + 1;
+ break;
+ }
+
+ /* return number of nanoseconds */
+ return micro_sec * 1000;
+}
+
+static int das1800_ai_check_chanlist(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_cmd *cmd)
+{
+ unsigned int unipolar0 = CR_RANGE(cmd->chanlist[0]) & UNIPOLAR;
+ int i;
+
+ for (i = 1; i < cmd->chanlist_len; i++) {
+ unsigned int unipolar = CR_RANGE(cmd->chanlist[i]) & UNIPOLAR;
+
+ if (unipolar != unipolar0) {
+ dev_dbg(dev->class_dev,
+ "unipolar and bipolar ranges cannot be mixed in the chanlist\n");
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+/* test analog input cmd */
+static int das1800_ai_do_cmdtest(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_cmd *cmd)
+{
+ const struct das1800_board *thisboard = dev->board_ptr;
+ int err = 0;
+ unsigned int arg;
+
+ /* Step 1 : check if triggers are trivially valid */
+
+ err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_EXT);
+ err |= comedi_check_trigger_src(&cmd->scan_begin_src,
+ TRIG_FOLLOW | TRIG_TIMER | TRIG_EXT);
+ err |= comedi_check_trigger_src(&cmd->convert_src,
+ TRIG_TIMER | TRIG_EXT);
+ err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
+ err |= comedi_check_trigger_src(&cmd->stop_src,
+ TRIG_COUNT | TRIG_EXT | TRIG_NONE);
+
+ if (err)
+ return 1;
+
+ /* Step 2a : make sure trigger sources are unique */
+
+ err |= comedi_check_trigger_is_unique(cmd->start_src);
+ err |= comedi_check_trigger_is_unique(cmd->scan_begin_src);
+ err |= comedi_check_trigger_is_unique(cmd->convert_src);
+ err |= comedi_check_trigger_is_unique(cmd->stop_src);
+
+ /* Step 2b : and mutually compatible */
+
+ if (cmd->scan_begin_src != TRIG_FOLLOW &&
+ cmd->convert_src != TRIG_TIMER)
+ err |= -EINVAL;
+
+ if (err)
+ return 2;
+
+ /* Step 3: check if arguments are trivially valid */
+
+ err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
+
+ if (cmd->convert_src == TRIG_TIMER) {
+ err |= comedi_check_trigger_arg_min(&cmd->convert_arg,
+ thisboard->ai_speed);
+ }
+
+ err |= comedi_check_trigger_arg_min(&cmd->chanlist_len, 1);
+ err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
+ cmd->chanlist_len);
+
+ switch (cmd->stop_src) {
+ case TRIG_COUNT:
+ err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
+ break;
+ case TRIG_NONE:
+ err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
+ break;
+ default:
+ break;
+ }
+
+ if (err)
+ return 3;
+
+ /* step 4: fix up any arguments */
+
+ if (cmd->scan_begin_src == TRIG_FOLLOW &&
+ cmd->convert_src == TRIG_TIMER) {
+ /* we are not in burst mode */
+ 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);
+ } else if (cmd->convert_src == TRIG_TIMER) {
+ /* we are in burst mode */
+ arg = burst_convert_arg(cmd->convert_arg, cmd->flags);
+ err |= comedi_check_trigger_arg_is(&cmd->convert_arg, arg);
+
+ if (cmd->scan_begin_src == TRIG_TIMER) {
+ arg = cmd->convert_arg * cmd->chanlist_len;
+ err |= comedi_check_trigger_arg_max(&cmd->
+ scan_begin_arg,
+ arg);
+
+ arg = cmd->scan_begin_arg;
+ comedi_8254_cascade_ns_to_timer(dev->pacer, &arg,
+ cmd->flags);
+ err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg,
+ arg);
+ }
+ }
+
+ if (err)
+ return 4;
+
+ /* Step 5: check channel list if it exists */
+ if (cmd->chanlist && cmd->chanlist_len > 0)
+ err |= das1800_ai_check_chanlist(dev, s, cmd);
+
+ if (err)
+ return 5;
+
+ return 0;
+}
+
+/* returns appropriate bits for control register a, depending on command */
+static int control_a_bits(const struct comedi_cmd *cmd)
+{
+ int control_a;
+
+ control_a = FFEN; /* enable fifo */
+ if (cmd->stop_src == TRIG_EXT)
+ control_a |= ATEN;
+ switch (cmd->start_src) {
+ case TRIG_EXT:
+ control_a |= TGEN | CGSL;
+ break;
+ case TRIG_NOW:
+ control_a |= CGEN;
+ break;
+ default:
+ break;
+ }
+
+ return control_a;
+}
+
+/* returns appropriate bits for control register c, depending on command */
+static int control_c_bits(const struct comedi_cmd *cmd)
+{
+ int control_c;
+ int aref;
+
+ /* set clock source to internal or external, select analog reference,
+ * select unipolar / bipolar
+ */
+ aref = CR_AREF(cmd->chanlist[0]);
+ control_c = UQEN; /* enable upper qram addresses */
+ if (aref != AREF_DIFF)
+ control_c |= SD;
+ if (aref == AREF_COMMON)
+ control_c |= CMEN;
+ /* if a unipolar range was selected */
+ if (CR_RANGE(cmd->chanlist[0]) & UNIPOLAR)
+ control_c |= UB;
+ switch (cmd->scan_begin_src) {
+ case TRIG_FOLLOW: /* not in burst mode */
+ switch (cmd->convert_src) {
+ case TRIG_TIMER:
+ /* trig on cascaded counters */
+ control_c |= IPCLK;
+ break;
+ case TRIG_EXT:
+ /* trig on falling edge of external trigger */
+ control_c |= XPCLK;
+ break;
+ default:
+ break;
+ }
+ break;
+ case TRIG_TIMER:
+ /* burst mode with internal pacer clock */
+ control_c |= BMDE | IPCLK;
+ break;
+ case TRIG_EXT:
+ /* burst mode with external trigger */
+ control_c |= BMDE | XPCLK;
+ break;
+ default:
+ break;
+ }
+
+ return control_c;
+}
+
+static unsigned int das1800_ai_transfer_size(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ unsigned int maxbytes,
+ unsigned int ns)
+{
+ struct comedi_cmd *cmd = &s->async->cmd;
+ unsigned int max_samples = comedi_bytes_to_samples(s, maxbytes);
+ unsigned int samples;
+
+ samples = max_samples;
+
+ /* for timed modes, make dma buffer fill in 'ns' time */
+ switch (cmd->scan_begin_src) {
+ case TRIG_FOLLOW: /* not in burst mode */
+ if (cmd->convert_src == TRIG_TIMER)
+ samples = ns / cmd->convert_arg;
+ break;
+ case TRIG_TIMER:
+ samples = ns / (cmd->scan_begin_arg * cmd->chanlist_len);
+ break;
+ }
+
+ /* limit samples to what is remaining in the command */
+ samples = comedi_nsamples_left(s, samples);
+
+ if (samples > max_samples)
+ samples = max_samples;
+ if (samples < 1)
+ samples = 1;
+
+ return comedi_samples_to_bytes(s, samples);
+}
+
+static void das1800_ai_setup_dma(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ struct das1800_private *devpriv = dev->private;
+ struct comedi_isadma *dma = devpriv->dma;
+ struct comedi_isadma_desc *desc = &dma->desc[0];
+ unsigned int bytes;
+
+ if ((devpriv->irq_dma_bits & DMA_ENABLED) == 0)
+ return;
+
+ dma->cur_dma = 0;
+
+ /* determine a dma transfer size to fill buffer in 0.3 sec */
+ bytes = das1800_ai_transfer_size(dev, s, desc->maxsize, 300000000);
+
+ desc->size = bytes;
+ comedi_isadma_program(desc);
+
+ /* set up dual dma if appropriate */
+ if (devpriv->irq_dma_bits & DMA_DUAL) {
+ desc = &dma->desc[1];
+ desc->size = bytes;
+ comedi_isadma_program(desc);
+ }
+}
+
+/* programs channel/gain list into card */
+static void program_chanlist(struct comedi_device *dev,
+ const struct comedi_cmd *cmd)
+{
+ int i, n, chan_range;
+ unsigned long irq_flags;
+ const int range_mask = 0x3; /* masks unipolar/bipolar bit off range */
+ const int range_bitshift = 8;
+
+ n = cmd->chanlist_len;
+ /* spinlock protects indirect addressing */
+ spin_lock_irqsave(&dev->spinlock, irq_flags);
+ outb(QRAM, dev->iobase + DAS1800_SELECT); /* select QRAM for baseAddress + 0x0 */
+ outb(n - 1, dev->iobase + DAS1800_QRAM_ADDRESS); /*set QRAM address start */
+ /* make channel / gain list */
+ for (i = 0; i < n; i++) {
+ chan_range =
+ CR_CHAN(cmd->chanlist[i]) |
+ ((CR_RANGE(cmd->chanlist[i]) & range_mask) <<
+ range_bitshift);
+ outw(chan_range, dev->iobase + DAS1800_QRAM);
+ }
+ outb(n - 1, dev->iobase + DAS1800_QRAM_ADDRESS); /*finish write to QRAM */
+ spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+}
+
+/* analog input do_cmd */
+static int das1800_ai_do_cmd(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ struct das1800_private *devpriv = dev->private;
+ int control_a, control_c;
+ struct comedi_async *async = s->async;
+ const struct comedi_cmd *cmd = &async->cmd;
+
+ /* disable dma on CMDF_WAKE_EOS, or CMDF_PRIORITY
+ * (because dma in handler is unsafe at hard real-time priority) */
+ if (cmd->flags & (CMDF_WAKE_EOS | CMDF_PRIORITY))
+ devpriv->irq_dma_bits &= ~DMA_ENABLED;
+ else
+ devpriv->irq_dma_bits |= devpriv->dma_bits;
+ /* interrupt on end of conversion for CMDF_WAKE_EOS */
+ if (cmd->flags & CMDF_WAKE_EOS) {
+ /* interrupt fifo not empty */
+ devpriv->irq_dma_bits &= ~FIMD;
+ } else {
+ /* interrupt fifo half full */
+ devpriv->irq_dma_bits |= FIMD;
+ }
+
+ das1800_cancel(dev, s);
+
+ /* determine proper bits for control registers */
+ control_a = control_a_bits(cmd);
+ control_c = control_c_bits(cmd);
+
+ /* setup card and start */
+ program_chanlist(dev, cmd);
+
+ /* setup cascaded counters for conversion/scan frequency */
+ if ((cmd->scan_begin_src == TRIG_FOLLOW ||
+ cmd->scan_begin_src == TRIG_TIMER) &&
+ cmd->convert_src == TRIG_TIMER) {
+ comedi_8254_update_divisors(dev->pacer);
+ comedi_8254_pacer_enable(dev->pacer, 1, 2, true);
+ }
+
+ /* setup counter 0 for 'about triggering' */
+ if (cmd->stop_src == TRIG_EXT)
+ comedi_8254_load(dev->pacer, 0, 1, I8254_MODE0 | I8254_BINARY);
+
+ das1800_ai_setup_dma(dev, s);
+ outb(control_c, dev->iobase + DAS1800_CONTROL_C);
+ /* set conversion rate and length for burst mode */
+ if (control_c & BMDE) {
+ /* program conversion period with number of microseconds minus 1 */
+ outb(cmd->convert_arg / 1000 - 1,
+ dev->iobase + DAS1800_BURST_RATE);
+ outb(cmd->chanlist_len - 1, dev->iobase + DAS1800_BURST_LENGTH);
+ }
+ outb(devpriv->irq_dma_bits, dev->iobase + DAS1800_CONTROL_B); /* enable irq/dma */
+ outb(control_a, dev->iobase + DAS1800_CONTROL_A); /* enable fifo and triggering */
+ outb(CVEN, dev->iobase + DAS1800_STATUS); /* enable conversions */
+
+ return 0;
+}
+
+/* read analog input */
+static int das1800_ai_rinsn(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data)
+{
+ const struct das1800_board *thisboard = dev->board_ptr;
+ int i, n;
+ int chan, range, aref, chan_range;
+ int timeout = 1000;
+ unsigned short dpnt;
+ int conv_flags = 0;
+ unsigned long irq_flags;
+
+ /* set up analog reference and unipolar / bipolar mode */
+ aref = CR_AREF(insn->chanspec);
+ conv_flags |= UQEN;
+ if (aref != AREF_DIFF)
+ conv_flags |= SD;
+ if (aref == AREF_COMMON)
+ conv_flags |= CMEN;
+ /* if a unipolar range was selected */
+ if (CR_RANGE(insn->chanspec) & UNIPOLAR)
+ conv_flags |= UB;
+
+ outb(conv_flags, dev->iobase + DAS1800_CONTROL_C); /* software conversion enabled */
+ outb(CVEN, dev->iobase + DAS1800_STATUS); /* enable conversions */
+ outb(0x0, dev->iobase + DAS1800_CONTROL_A); /* reset fifo */
+ outb(FFEN, dev->iobase + DAS1800_CONTROL_A);
+
+ chan = CR_CHAN(insn->chanspec);
+ /* mask of unipolar/bipolar bit from range */
+ range = CR_RANGE(insn->chanspec) & 0x3;
+ chan_range = chan | (range << 8);
+ spin_lock_irqsave(&dev->spinlock, irq_flags);
+ outb(QRAM, dev->iobase + DAS1800_SELECT); /* select QRAM for baseAddress + 0x0 */
+ outb(0x0, dev->iobase + DAS1800_QRAM_ADDRESS); /* set QRAM address start */
+ outw(chan_range, dev->iobase + DAS1800_QRAM);
+ outb(0x0, dev->iobase + DAS1800_QRAM_ADDRESS); /*finish write to QRAM */
+ outb(ADC, dev->iobase + DAS1800_SELECT); /* select ADC for baseAddress + 0x0 */
+
+ for (n = 0; n < insn->n; n++) {
+ /* trigger conversion */
+ outb(0, dev->iobase + DAS1800_FIFO);
+ for (i = 0; i < timeout; i++) {
+ if (inb(dev->iobase + DAS1800_STATUS) & FNE)
+ break;
+ }
+ if (i == timeout) {
+ dev_err(dev->class_dev, "timeout\n");
+ n = -ETIME;
+ goto exit;
+ }
+ dpnt = inw(dev->iobase + DAS1800_FIFO);
+ /* shift data to offset binary for bipolar ranges */
+ if ((conv_flags & UB) == 0)
+ dpnt += 1 << (thisboard->resolution - 1);
+ data[n] = dpnt;
+ }
+exit:
+ spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+
+ return n;
+}
+
+/* writes to an analog output channel */
+static int das1800_ao_winsn(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data)
+{
+ const struct das1800_board *thisboard = dev->board_ptr;
+ struct das1800_private *devpriv = dev->private;
+ int chan = CR_CHAN(insn->chanspec);
+/* int range = CR_RANGE(insn->chanspec); */
+ int update_chan = thisboard->ao_n_chan - 1;
+ unsigned short output;
+ unsigned long irq_flags;
+
+ /* card expects two's complement data */
+ output = data[0] - (1 << (thisboard->resolution - 1));
+ /* if the write is to the 'update' channel, we need to remember its value */
+ if (chan == update_chan)
+ devpriv->ao_update_bits = output;
+ /* write to channel */
+ spin_lock_irqsave(&dev->spinlock, irq_flags);
+ outb(DAC(chan), dev->iobase + DAS1800_SELECT); /* select dac channel for baseAddress + 0x0 */
+ outw(output, dev->iobase + DAS1800_DAC);
+ /* now we need to write to 'update' channel to update all dac channels */
+ if (chan != update_chan) {
+ outb(DAC(update_chan), dev->iobase + DAS1800_SELECT); /* select 'update' channel for baseAddress + 0x0 */
+ outw(devpriv->ao_update_bits, dev->iobase + DAS1800_DAC);
+ }
+ spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+
+ return 1;
+}
+
+/* reads from digital input channels */
+static int das1800_di_rbits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data)
+{
+ data[1] = inb(dev->iobase + DAS1800_DIGITAL) & 0xf;
+ data[0] = 0;
+
+ return insn->n;
+}
+
+static int das1800_do_wbits(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, dev->iobase + DAS1800_DIGITAL);
+
+ data[1] = s->state;
+
+ return insn->n;
+}
+
+static void das1800_init_dma(struct comedi_device *dev,
+ struct comedi_devconfig *it)
+{
+ struct das1800_private *devpriv = dev->private;
+ unsigned int *dma_chan;
+
+ /*
+ * it->options[2] is DMA channel 0
+ * it->options[3] is DMA channel 1
+ *
+ * Encode the DMA channels into 2 digit hexadecimal for switch.
+ */
+ dma_chan = &it->options[2];
+
+ switch ((dma_chan[0] & 0x7) | (dma_chan[1] << 4)) {
+ case 0x5: /* dma0 == 5 */
+ devpriv->dma_bits = DMA_CH5;
+ break;
+ case 0x6: /* dma0 == 6 */
+ devpriv->dma_bits = DMA_CH6;
+ break;
+ case 0x7: /* dma0 == 7 */
+ devpriv->dma_bits = DMA_CH7;
+ break;
+ case 0x65: /* dma0 == 5, dma1 == 6 */
+ devpriv->dma_bits = DMA_CH5_CH6;
+ break;
+ case 0x76: /* dma0 == 6, dma1 == 7 */
+ devpriv->dma_bits = DMA_CH6_CH7;
+ break;
+ case 0x57: /* dma0 == 7, dma1 == 5 */
+ devpriv->dma_bits = DMA_CH7_CH5;
+ break;
+ default:
+ return;
+ }
+
+ /* DMA can use 1 or 2 buffers, each with a separate channel */
+ devpriv->dma = comedi_isadma_alloc(dev, dma_chan[1] ? 2 : 1,
+ dma_chan[0], dma_chan[1],
+ DMA_BUF_SIZE, COMEDI_ISADMA_READ);
+ if (!devpriv->dma)
+ devpriv->dma_bits = 0;
+}
+
+static void das1800_free_dma(struct comedi_device *dev)
+{
+ struct das1800_private *devpriv = dev->private;
+
+ if (devpriv)
+ comedi_isadma_free(devpriv->dma);
+}
+
+static int das1800_probe(struct comedi_device *dev)
+{
+ const struct das1800_board *board = dev->board_ptr;
+ int index;
+ int id;
+
+ /* calc the offset to the boardinfo that was found by the core */
+ index = board - das1800_boards;
+
+ /* verify that the board id matches the boardinfo */
+ id = (inb(dev->iobase + DAS1800_DIGITAL) >> 4) & 0xf;
+ switch (id) {
+ case 0x3:
+ if (index == das1801st_da || index == das1802st_da ||
+ index == das1701st_da || index == das1702st_da)
+ return index;
+ index = das1801st;
+ break;
+ case 0x4:
+ if (index == das1802hr_da || index == das1702hr_da)
+ return index;
+ index = das1802hr;
+ break;
+ case 0x5:
+ if (index == das1801ao || index == das1802ao ||
+ index == das1701ao || index == das1702ao)
+ return index;
+ index = das1801ao;
+ break;
+ case 0x6:
+ if (index == das1802hr || index == das1702hr)
+ return index;
+ index = das1802hr;
+ break;
+ case 0x7:
+ if (index == das1801st || index == das1802st ||
+ index == das1701st || index == das1702st)
+ return index;
+ index = das1801st;
+ break;
+ case 0x8:
+ if (index == das1801hc || index == das1802hc)
+ return index;
+ index = das1801hc;
+ break;
+ default:
+ dev_err(dev->class_dev,
+ "Board model: probe returned 0x%x (unknown, please report)\n",
+ id);
+ break;
+ }
+ dev_err(dev->class_dev,
+ "Board model (probed, not recommended): %s series\n",
+ das1800_boards[index].name);
+
+ return index;
+}
+
+static int das1800_attach(struct comedi_device *dev,
+ struct comedi_devconfig *it)
+{
+ const struct das1800_board *thisboard;
+ struct das1800_private *devpriv;
+ struct comedi_subdevice *s;
+ unsigned int irq = it->options[1];
+ int board;
+ int ret;
+
+ devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
+ if (!devpriv)
+ return -ENOMEM;
+
+ ret = comedi_request_region(dev, it->options[0], DAS1800_SIZE);
+ if (ret)
+ return ret;
+
+ board = das1800_probe(dev);
+ if (board < 0) {
+ dev_err(dev->class_dev, "unable to determine board type\n");
+ return -ENODEV;
+ }
+
+ dev->board_ptr = das1800_boards + board;
+ thisboard = dev->board_ptr;
+ dev->board_name = thisboard->name;
+
+ /* if it is an 'ao' board with fancy analog out then we need extra io ports */
+ if (thisboard->ao_ability == 2) {
+ unsigned long iobase2 = dev->iobase + IOBASE2;
+
+ ret = __comedi_request_region(dev, iobase2, DAS1800_SIZE);
+ if (ret)
+ return ret;
+ devpriv->iobase2 = iobase2;
+ }
+
+ if (irq == 3 || irq == 5 || irq == 7 || irq == 10 || irq == 11 ||
+ irq == 15) {
+ ret = request_irq(irq, das1800_interrupt, 0,
+ dev->board_name, dev);
+ if (ret == 0) {
+ dev->irq = irq;
+
+ switch (irq) {
+ case 3:
+ devpriv->irq_dma_bits |= 0x8;
+ break;
+ case 5:
+ devpriv->irq_dma_bits |= 0x10;
+ break;
+ case 7:
+ devpriv->irq_dma_bits |= 0x18;
+ break;
+ case 10:
+ devpriv->irq_dma_bits |= 0x28;
+ break;
+ case 11:
+ devpriv->irq_dma_bits |= 0x30;
+ break;
+ case 15:
+ devpriv->irq_dma_bits |= 0x38;
+ break;
+ }
+ }
+ }
+
+ /* an irq and one dma channel is required to use dma */
+ if (dev->irq & it->options[2])
+ das1800_init_dma(dev, it);
+
+ devpriv->fifo_buf = kmalloc_array(FIFO_SIZE, sizeof(uint16_t), GFP_KERNEL);
+ if (!devpriv->fifo_buf)
+ return -ENOMEM;
+
+ dev->pacer = comedi_8254_init(dev->iobase + DAS1800_COUNTER,
+ I8254_OSC_BASE_5MHZ, I8254_IO8, 0);
+ if (!dev->pacer)
+ return -ENOMEM;
+
+ ret = comedi_alloc_subdevices(dev, 4);
+ if (ret)
+ return ret;
+
+ /* analog input subdevice */
+ s = &dev->subdevices[0];
+ s->type = COMEDI_SUBD_AI;
+ s->subdev_flags = SDF_READABLE | SDF_DIFF | SDF_GROUND;
+ if (thisboard->common)
+ s->subdev_flags |= SDF_COMMON;
+ s->n_chan = thisboard->qram_len;
+ s->maxdata = (1 << thisboard->resolution) - 1;
+ s->range_table = thisboard->range_ai;
+ s->insn_read = das1800_ai_rinsn;
+ if (dev->irq) {
+ dev->read_subdev = s;
+ s->subdev_flags |= SDF_CMD_READ;
+ s->len_chanlist = s->n_chan;
+ s->do_cmd = das1800_ai_do_cmd;
+ s->do_cmdtest = das1800_ai_do_cmdtest;
+ s->poll = das1800_ai_poll;
+ s->cancel = das1800_cancel;
+ }
+
+ /* analog out */
+ s = &dev->subdevices[1];
+ if (thisboard->ao_ability == 1) {
+ s->type = COMEDI_SUBD_AO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = thisboard->ao_n_chan;
+ s->maxdata = (1 << thisboard->resolution) - 1;
+ s->range_table = &range_bipolar10;
+ s->insn_write = das1800_ao_winsn;
+ } else {
+ s->type = COMEDI_SUBD_UNUSED;
+ }
+
+ /* di */
+ s = &dev->subdevices[2];
+ 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 = das1800_di_rbits;
+
+ /* do */
+ s = &dev->subdevices[3];
+ s->type = COMEDI_SUBD_DO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = thisboard->do_n_chan;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits = das1800_do_wbits;
+
+ das1800_cancel(dev, dev->read_subdev);
+
+ /* initialize digital out channels */
+ outb(0, dev->iobase + DAS1800_DIGITAL);
+
+ /* initialize analog out channels */
+ if (thisboard->ao_ability == 1) {
+ /* select 'update' dac channel for baseAddress + 0x0 */
+ outb(DAC(thisboard->ao_n_chan - 1),
+ dev->iobase + DAS1800_SELECT);
+ outw(devpriv->ao_update_bits, dev->iobase + DAS1800_DAC);
+ }
+
+ return 0;
+};
+
+static void das1800_detach(struct comedi_device *dev)
+{
+ struct das1800_private *devpriv = dev->private;
+
+ das1800_free_dma(dev);
+ if (devpriv) {
+ kfree(devpriv->fifo_buf);
+ if (devpriv->iobase2)
+ release_region(devpriv->iobase2, DAS1800_SIZE);
+ }
+ comedi_legacy_detach(dev);
+}
+
+static struct comedi_driver das1800_driver = {
+ .driver_name = "das1800",
+ .module = THIS_MODULE,
+ .attach = das1800_attach,
+ .detach = das1800_detach,
+ .num_names = ARRAY_SIZE(das1800_boards),
+ .board_name = &das1800_boards[0].name,
+ .offset = sizeof(struct das1800_board),
+};
+module_comedi_driver(das1800_driver);
+
+MODULE_AUTHOR("Comedi http://www.comedi.org");
+MODULE_DESCRIPTION("Comedi low-level driver");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff