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Diffstat (limited to 'drivers/staging/comedi/drivers/quatech_daqp_cs.c')
-rw-r--r--drivers/staging/comedi/drivers/quatech_daqp_cs.c842
1 files changed, 0 insertions, 842 deletions
diff --git a/drivers/staging/comedi/drivers/quatech_daqp_cs.c b/drivers/staging/comedi/drivers/quatech_daqp_cs.c
deleted file mode 100644
index fe4408ebf6b3..000000000000
--- a/drivers/staging/comedi/drivers/quatech_daqp_cs.c
+++ /dev/null
@@ -1,842 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * quatech_daqp_cs.c
- * Quatech DAQP PCMCIA data capture cards COMEDI client driver
- * Copyright (C) 2000, 2003 Brent Baccala <baccala@freesoft.org>
- * The DAQP interface code in this file is released into the public domain.
- *
- * COMEDI - Linux Control and Measurement Device Interface
- * Copyright (C) 1998 David A. Schleef <ds@schleef.org>
- * https://www.comedi.org/
- *
- * Documentation for the DAQP PCMCIA cards can be found on Quatech's site:
- * ftp://ftp.quatech.com/Manuals/daqp-208.pdf
- *
- * This manual is for both the DAQP-208 and the DAQP-308.
- *
- * What works:
- * - A/D conversion
- * - 8 channels
- * - 4 gain ranges
- * - ground ref or differential
- * - single-shot and timed both supported
- * - D/A conversion, single-shot
- * - digital I/O
- *
- * What doesn't:
- * - any kind of triggering - external or D/A channel 1
- * - the card's optional expansion board
- * - the card's timer (for anything other than A/D conversion)
- * - D/A update modes other than immediate (i.e, timed)
- * - fancier timing modes
- * - setting card's FIFO buffer thresholds to anything but default
- */
-
-/*
- * Driver: quatech_daqp_cs
- * Description: Quatech DAQP PCMCIA data capture cards
- * Devices: [Quatech] DAQP-208 (daqp), DAQP-308
- * Author: Brent Baccala <baccala@freesoft.org>
- * Status: works
- */
-
-#include <linux/module.h>
-
-#include "../comedi_pcmcia.h"
-
-/*
- * Register I/O map
- *
- * The D/A and timer registers can be accessed with 16-bit or 8-bit I/O
- * instructions. All other registers can only use 8-bit instructions.
- *
- * The FIFO and scanlist registers require two 8-bit instructions to
- * access the 16-bit data. Data is transferred LSB then MSB.
- */
-#define DAQP_AI_FIFO_REG 0x00
-
-#define DAQP_SCANLIST_REG 0x01
-#define DAQP_SCANLIST_DIFFERENTIAL BIT(14)
-#define DAQP_SCANLIST_GAIN(x) (((x) & 0x3) << 12)
-#define DAQP_SCANLIST_CHANNEL(x) (((x) & 0xf) << 8)
-#define DAQP_SCANLIST_START BIT(7)
-#define DAQP_SCANLIST_EXT_GAIN(x) (((x) & 0x3) << 4)
-#define DAQP_SCANLIST_EXT_CHANNEL(x) (((x) & 0xf) << 0)
-
-#define DAQP_CTRL_REG 0x02
-#define DAQP_CTRL_PACER_CLK(x) (((x) & 0x3) << 6)
-#define DAQP_CTRL_PACER_CLK_EXT DAQP_CTRL_PACER_CLK(0)
-#define DAQP_CTRL_PACER_CLK_5MHZ DAQP_CTRL_PACER_CLK(1)
-#define DAQP_CTRL_PACER_CLK_1MHZ DAQP_CTRL_PACER_CLK(2)
-#define DAQP_CTRL_PACER_CLK_100KHZ DAQP_CTRL_PACER_CLK(3)
-#define DAQP_CTRL_EXPANSION BIT(5)
-#define DAQP_CTRL_EOS_INT_ENA BIT(4)
-#define DAQP_CTRL_FIFO_INT_ENA BIT(3)
-#define DAQP_CTRL_TRIG_MODE BIT(2) /* 0=one-shot; 1=continuous */
-#define DAQP_CTRL_TRIG_SRC BIT(1) /* 0=internal; 1=external */
-#define DAQP_CTRL_TRIG_EDGE BIT(0) /* 0=rising; 1=falling */
-
-#define DAQP_STATUS_REG 0x02
-#define DAQP_STATUS_IDLE BIT(7)
-#define DAQP_STATUS_RUNNING BIT(6)
-#define DAQP_STATUS_DATA_LOST BIT(5)
-#define DAQP_STATUS_END_OF_SCAN BIT(4)
-#define DAQP_STATUS_FIFO_THRESHOLD BIT(3)
-#define DAQP_STATUS_FIFO_FULL BIT(2)
-#define DAQP_STATUS_FIFO_NEARFULL BIT(1)
-#define DAQP_STATUS_FIFO_EMPTY BIT(0)
-/* these bits clear when the status register is read */
-#define DAQP_STATUS_EVENTS (DAQP_STATUS_DATA_LOST | \
- DAQP_STATUS_END_OF_SCAN | \
- DAQP_STATUS_FIFO_THRESHOLD)
-
-#define DAQP_DI_REG 0x03
-#define DAQP_DO_REG 0x03
-
-#define DAQP_PACER_LOW_REG 0x04
-#define DAQP_PACER_MID_REG 0x05
-#define DAQP_PACER_HIGH_REG 0x06
-
-#define DAQP_CMD_REG 0x07
-/* the monostable bits are self-clearing after the function is complete */
-#define DAQP_CMD_ARM BIT(7) /* monostable */
-#define DAQP_CMD_RSTF BIT(6) /* monostable */
-#define DAQP_CMD_RSTQ BIT(5) /* monostable */
-#define DAQP_CMD_STOP BIT(4) /* monostable */
-#define DAQP_CMD_LATCH BIT(3) /* monostable */
-#define DAQP_CMD_SCANRATE(x) (((x) & 0x3) << 1)
-#define DAQP_CMD_SCANRATE_100KHZ DAQP_CMD_SCANRATE(0)
-#define DAQP_CMD_SCANRATE_50KHZ DAQP_CMD_SCANRATE(1)
-#define DAQP_CMD_SCANRATE_25KHZ DAQP_CMD_SCANRATE(2)
-#define DAQP_CMD_FIFO_DATA BIT(0)
-
-#define DAQP_AO_REG 0x08 /* and 0x09 (16-bit) */
-
-#define DAQP_TIMER_REG 0x0a /* and 0x0b (16-bit) */
-
-#define DAQP_AUX_REG 0x0f
-/* Auxiliary Control register bits (write) */
-#define DAQP_AUX_EXT_ANALOG_TRIG BIT(7)
-#define DAQP_AUX_PRETRIG BIT(6)
-#define DAQP_AUX_TIMER_INT_ENA BIT(5)
-#define DAQP_AUX_TIMER_MODE(x) (((x) & 0x3) << 3)
-#define DAQP_AUX_TIMER_MODE_RELOAD DAQP_AUX_TIMER_MODE(0)
-#define DAQP_AUX_TIMER_MODE_PAUSE DAQP_AUX_TIMER_MODE(1)
-#define DAQP_AUX_TIMER_MODE_GO DAQP_AUX_TIMER_MODE(2)
-#define DAQP_AUX_TIMER_MODE_EXT DAQP_AUX_TIMER_MODE(3)
-#define DAQP_AUX_TIMER_CLK_SRC_EXT BIT(2)
-#define DAQP_AUX_DA_UPDATE(x) (((x) & 0x3) << 0)
-#define DAQP_AUX_DA_UPDATE_DIRECT DAQP_AUX_DA_UPDATE(0)
-#define DAQP_AUX_DA_UPDATE_OVERFLOW DAQP_AUX_DA_UPDATE(1)
-#define DAQP_AUX_DA_UPDATE_EXTERNAL DAQP_AUX_DA_UPDATE(2)
-#define DAQP_AUX_DA_UPDATE_PACER DAQP_AUX_DA_UPDATE(3)
-/* Auxiliary Status register bits (read) */
-#define DAQP_AUX_RUNNING BIT(7)
-#define DAQP_AUX_TRIGGERED BIT(6)
-#define DAQP_AUX_DA_BUFFER BIT(5)
-#define DAQP_AUX_TIMER_OVERFLOW BIT(4)
-#define DAQP_AUX_CONVERSION BIT(3)
-#define DAQP_AUX_DATA_LOST BIT(2)
-#define DAQP_AUX_FIFO_NEARFULL BIT(1)
-#define DAQP_AUX_FIFO_EMPTY BIT(0)
-
-#define DAQP_FIFO_SIZE 4096
-
-#define DAQP_MAX_TIMER_SPEED 10000 /* 100 kHz in nanoseconds */
-
-struct daqp_private {
- unsigned int pacer_div;
- int stop;
-};
-
-static const struct comedi_lrange range_daqp_ai = {
- 4, {
- BIP_RANGE(10),
- BIP_RANGE(5),
- BIP_RANGE(2.5),
- BIP_RANGE(1.25)
- }
-};
-
-static int daqp_clear_events(struct comedi_device *dev, int loops)
-{
- unsigned int status;
-
- /*
- * Reset any pending interrupts (my card has a tendency to require
- * multiple reads on the status register to achieve this).
- */
- while (--loops) {
- status = inb(dev->iobase + DAQP_STATUS_REG);
- if ((status & DAQP_STATUS_EVENTS) == 0)
- return 0;
- }
- dev_err(dev->class_dev, "couldn't clear events in status register\n");
- return -EBUSY;
-}
-
-static int daqp_ai_cancel(struct comedi_device *dev,
- struct comedi_subdevice *s)
-{
- struct daqp_private *devpriv = dev->private;
-
- if (devpriv->stop)
- return -EIO;
-
- /*
- * Stop any conversions, disable interrupts, and clear
- * the status event flags.
- */
- outb(DAQP_CMD_STOP, dev->iobase + DAQP_CMD_REG);
- outb(0, dev->iobase + DAQP_CTRL_REG);
- inb(dev->iobase + DAQP_STATUS_REG);
-
- return 0;
-}
-
-static unsigned int daqp_ai_get_sample(struct comedi_device *dev,
- struct comedi_subdevice *s)
-{
- unsigned int val;
-
- /*
- * Get a two's complement sample from the FIFO and
- * return the munged offset binary value.
- */
- val = inb(dev->iobase + DAQP_AI_FIFO_REG);
- val |= inb(dev->iobase + DAQP_AI_FIFO_REG) << 8;
- return comedi_offset_munge(s, val);
-}
-
-static irqreturn_t daqp_interrupt(int irq, void *dev_id)
-{
- struct comedi_device *dev = dev_id;
- struct comedi_subdevice *s = dev->read_subdev;
- struct comedi_cmd *cmd = &s->async->cmd;
- int loop_limit = 10000;
- int status;
-
- if (!dev->attached)
- return IRQ_NONE;
-
- status = inb(dev->iobase + DAQP_STATUS_REG);
- if (!(status & DAQP_STATUS_EVENTS))
- return IRQ_NONE;
-
- while (!(status & DAQP_STATUS_FIFO_EMPTY)) {
- unsigned short data;
-
- if (status & DAQP_STATUS_DATA_LOST) {
- s->async->events |= COMEDI_CB_OVERFLOW;
- dev_warn(dev->class_dev, "data lost\n");
- break;
- }
-
- data = daqp_ai_get_sample(dev, s);
- comedi_buf_write_samples(s, &data, 1);
-
- if (cmd->stop_src == TRIG_COUNT &&
- s->async->scans_done >= cmd->stop_arg) {
- s->async->events |= COMEDI_CB_EOA;
- break;
- }
-
- if ((loop_limit--) <= 0)
- break;
-
- status = inb(dev->iobase + DAQP_STATUS_REG);
- }
-
- if (loop_limit <= 0) {
- dev_warn(dev->class_dev,
- "loop_limit reached in %s()\n", __func__);
- s->async->events |= COMEDI_CB_ERROR;
- }
-
- comedi_handle_events(dev, s);
-
- return IRQ_HANDLED;
-}
-
-static void daqp_ai_set_one_scanlist_entry(struct comedi_device *dev,
- unsigned int chanspec,
- int start)
-{
- unsigned int chan = CR_CHAN(chanspec);
- unsigned int range = CR_RANGE(chanspec);
- unsigned int aref = CR_AREF(chanspec);
- unsigned int val;
-
- val = DAQP_SCANLIST_CHANNEL(chan) | DAQP_SCANLIST_GAIN(range);
-
- if (aref == AREF_DIFF)
- val |= DAQP_SCANLIST_DIFFERENTIAL;
-
- if (start)
- val |= DAQP_SCANLIST_START;
-
- outb(val & 0xff, dev->iobase + DAQP_SCANLIST_REG);
- outb((val >> 8) & 0xff, dev->iobase + DAQP_SCANLIST_REG);
-}
-
-static int daqp_ai_eos(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn,
- unsigned long context)
-{
- unsigned int status;
-
- status = inb(dev->iobase + DAQP_AUX_REG);
- if (status & DAQP_AUX_CONVERSION)
- return 0;
- return -EBUSY;
-}
-
-static int daqp_ai_insn_read(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn,
- unsigned int *data)
-{
- struct daqp_private *devpriv = dev->private;
- int ret = 0;
- int i;
-
- if (devpriv->stop)
- return -EIO;
-
- outb(0, dev->iobase + DAQP_AUX_REG);
-
- /* Reset scan list queue */
- outb(DAQP_CMD_RSTQ, dev->iobase + DAQP_CMD_REG);
-
- /* Program one scan list entry */
- daqp_ai_set_one_scanlist_entry(dev, insn->chanspec, 1);
-
- /* Reset data FIFO (see page 28 of DAQP User's Manual) */
- outb(DAQP_CMD_RSTF, dev->iobase + DAQP_CMD_REG);
-
- /* Set trigger - one-shot, internal, no interrupts */
- outb(DAQP_CTRL_PACER_CLK_100KHZ, dev->iobase + DAQP_CTRL_REG);
-
- ret = daqp_clear_events(dev, 10000);
- if (ret)
- return ret;
-
- for (i = 0; i < insn->n; i++) {
- /* Start conversion */
- outb(DAQP_CMD_ARM | DAQP_CMD_FIFO_DATA,
- dev->iobase + DAQP_CMD_REG);
-
- ret = comedi_timeout(dev, s, insn, daqp_ai_eos, 0);
- if (ret)
- break;
-
- /* clear the status event flags */
- inb(dev->iobase + DAQP_STATUS_REG);
-
- data[i] = daqp_ai_get_sample(dev, s);
- }
-
- /* stop any conversions and clear the status event flags */
- outb(DAQP_CMD_STOP, dev->iobase + DAQP_CMD_REG);
- inb(dev->iobase + DAQP_STATUS_REG);
-
- return ret ? ret : insn->n;
-}
-
-/* This function converts ns nanoseconds to a counter value suitable
- * for programming the device. We always use the DAQP's 5 MHz clock,
- * which with its 24-bit counter, allows values up to 84 seconds.
- * Also, the function adjusts ns so that it cooresponds to the actual
- * time that the device will use.
- */
-
-static int daqp_ns_to_timer(unsigned int *ns, unsigned int flags)
-{
- int timer;
-
- timer = *ns / 200;
- *ns = timer * 200;
-
- return timer;
-}
-
-static void daqp_set_pacer(struct comedi_device *dev, unsigned int val)
-{
- outb(val & 0xff, dev->iobase + DAQP_PACER_LOW_REG);
- outb((val >> 8) & 0xff, dev->iobase + DAQP_PACER_MID_REG);
- outb((val >> 16) & 0xff, dev->iobase + DAQP_PACER_HIGH_REG);
-}
-
-static int daqp_ai_cmdtest(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_cmd *cmd)
-{
- struct daqp_private *devpriv = dev->private;
- int err = 0;
- unsigned int arg;
-
- /* Step 1 : check if triggers are trivially valid */
-
- err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
- err |= comedi_check_trigger_src(&cmd->scan_begin_src,
- TRIG_TIMER | TRIG_FOLLOW);
- err |= comedi_check_trigger_src(&cmd->convert_src,
- TRIG_TIMER | TRIG_NOW);
- err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
- err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
-
- if (err)
- return 1;
-
- /* Step 2a : make sure trigger sources are unique */
-
- err |= comedi_check_trigger_is_unique(cmd->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 */
-
- /* the async command requires a pacer */
- if (cmd->scan_begin_src != TRIG_TIMER && 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);
-
- err |= comedi_check_trigger_arg_min(&cmd->chanlist_len, 1);
- err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
- cmd->chanlist_len);
-
- if (cmd->scan_begin_src == TRIG_TIMER)
- err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg,
- DAQP_MAX_TIMER_SPEED);
-
- if (cmd->convert_src == TRIG_TIMER) {
- err |= comedi_check_trigger_arg_min(&cmd->convert_arg,
- DAQP_MAX_TIMER_SPEED);
-
- if (cmd->scan_begin_src == TRIG_TIMER) {
- /*
- * If both scan_begin and convert are both timer
- * values, the only way that can make sense is if
- * the scan time is the number of conversions times
- * the convert time.
- */
- arg = cmd->convert_arg * cmd->scan_end_arg;
- err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg,
- arg);
- }
- }
-
- if (cmd->stop_src == TRIG_COUNT)
- err |= comedi_check_trigger_arg_max(&cmd->stop_arg, 0x00ffffff);
- else /* TRIG_NONE */
- err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
-
- if (err)
- return 3;
-
- /* step 4: fix up any arguments */
-
- if (cmd->convert_src == TRIG_TIMER) {
- arg = cmd->convert_arg;
- devpriv->pacer_div = daqp_ns_to_timer(&arg, cmd->flags);
- err |= comedi_check_trigger_arg_is(&cmd->convert_arg, arg);
- } else if (cmd->scan_begin_src == TRIG_TIMER) {
- arg = cmd->scan_begin_arg;
- devpriv->pacer_div = daqp_ns_to_timer(&arg, cmd->flags);
- err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, arg);
- }
-
- if (err)
- return 4;
-
- return 0;
-}
-
-static int daqp_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
-{
- struct daqp_private *devpriv = dev->private;
- struct comedi_cmd *cmd = &s->async->cmd;
- int scanlist_start_on_every_entry;
- int threshold;
- int ret;
- int i;
-
- if (devpriv->stop)
- return -EIO;
-
- outb(0, dev->iobase + DAQP_AUX_REG);
-
- /* Reset scan list queue */
- outb(DAQP_CMD_RSTQ, dev->iobase + DAQP_CMD_REG);
-
- /* Program pacer clock
- *
- * There's two modes we can operate in. If convert_src is
- * TRIG_TIMER, then convert_arg specifies the time between
- * each conversion, so we program the pacer clock to that
- * frequency and set the SCANLIST_START bit on every scanlist
- * entry. Otherwise, convert_src is TRIG_NOW, which means
- * we want the fastest possible conversions, scan_begin_src
- * is TRIG_TIMER, and scan_begin_arg specifies the time between
- * each scan, so we program the pacer clock to this frequency
- * and only set the SCANLIST_START bit on the first entry.
- */
- daqp_set_pacer(dev, devpriv->pacer_div);
-
- if (cmd->convert_src == TRIG_TIMER)
- scanlist_start_on_every_entry = 1;
- else
- scanlist_start_on_every_entry = 0;
-
- /* Program scan list */
- for (i = 0; i < cmd->chanlist_len; i++) {
- int start = (i == 0 || scanlist_start_on_every_entry);
-
- daqp_ai_set_one_scanlist_entry(dev, cmd->chanlist[i], start);
- }
-
- /* Now it's time to program the FIFO threshold, basically the
- * number of samples the card will buffer before it interrupts
- * the CPU.
- *
- * If we don't have a stop count, then use half the size of
- * the FIFO (the manufacturer's recommendation). Consider
- * that the FIFO can hold 2K samples (4K bytes). With the
- * threshold set at half the FIFO size, we have a margin of
- * error of 1024 samples. At the chip's maximum sample rate
- * of 100,000 Hz, the CPU would have to delay interrupt
- * service for a full 10 milliseconds in order to lose data
- * here (as opposed to higher up in the kernel). I've never
- * seen it happen. However, for slow sample rates it may
- * buffer too much data and introduce too much delay for the
- * user application.
- *
- * If we have a stop count, then things get more interesting.
- * If the stop count is less than the FIFO size (actually
- * three-quarters of the FIFO size - see below), we just use
- * the stop count itself as the threshold, the card interrupts
- * us when that many samples have been taken, and we kill the
- * acquisition at that point and are done. If the stop count
- * is larger than that, then we divide it by 2 until it's less
- * than three quarters of the FIFO size (we always leave the
- * top quarter of the FIFO as protection against sluggish CPU
- * interrupt response) and use that as the threshold. So, if
- * the stop count is 4000 samples, we divide by two twice to
- * get 1000 samples, use that as the threshold, take four
- * interrupts to get our 4000 samples and are done.
- *
- * The algorithm could be more clever. For example, if 81000
- * samples are requested, we could set the threshold to 1500
- * samples and take 54 interrupts to get 81000. But 54 isn't
- * a power of two, so this algorithm won't find that option.
- * Instead, it'll set the threshold at 1266 and take 64
- * interrupts to get 81024 samples, of which the last 24 will
- * be discarded... but we won't get the last interrupt until
- * they've been collected. To find the first option, the
- * computer could look at the prime decomposition of the
- * sample count (81000 = 3^4 * 5^3 * 2^3) and factor it into a
- * threshold (1500 = 3 * 5^3 * 2^2) and an interrupt count (54
- * = 3^3 * 2). Hmmm... a one-line while loop or prime
- * decomposition of integers... I'll leave it the way it is.
- *
- * I'll also note a mini-race condition before ignoring it in
- * the code. Let's say we're taking 4000 samples, as before.
- * After 1000 samples, we get an interrupt. But before that
- * interrupt is completely serviced, another sample is taken
- * and loaded into the FIFO. Since the interrupt handler
- * empties the FIFO before returning, it will read 1001 samples.
- * If that happens four times, we'll end up taking 4004 samples,
- * not 4000. The interrupt handler will discard the extra four
- * samples (by halting the acquisition with four samples still
- * in the FIFO), but we will have to wait for them.
- *
- * In short, this code works pretty well, but for either of
- * the two reasons noted, might end up waiting for a few more
- * samples than actually requested. Shouldn't make too much
- * of a difference.
- */
-
- /* Save away the number of conversions we should perform, and
- * compute the FIFO threshold (in bytes, not samples - that's
- * why we multiple devpriv->count by 2 = sizeof(sample))
- */
-
- if (cmd->stop_src == TRIG_COUNT) {
- unsigned long long nsamples;
- unsigned long long nbytes;
-
- nsamples = (unsigned long long)cmd->stop_arg *
- cmd->scan_end_arg;
- nbytes = nsamples * comedi_bytes_per_sample(s);
- while (nbytes > DAQP_FIFO_SIZE * 3 / 4)
- nbytes /= 2;
- threshold = nbytes;
- } else {
- threshold = DAQP_FIFO_SIZE / 2;
- }
-
- /* Reset data FIFO (see page 28 of DAQP User's Manual) */
-
- outb(DAQP_CMD_RSTF, dev->iobase + DAQP_CMD_REG);
-
- /* Set FIFO threshold. First two bytes are near-empty
- * threshold, which is unused; next two bytes are near-full
- * threshold. We computed the number of bytes we want in the
- * FIFO when the interrupt is generated, what the card wants
- * is actually the number of available bytes left in the FIFO
- * when the interrupt is to happen.
- */
-
- outb(0x00, dev->iobase + DAQP_AI_FIFO_REG);
- outb(0x00, dev->iobase + DAQP_AI_FIFO_REG);
-
- outb((DAQP_FIFO_SIZE - threshold) & 0xff,
- dev->iobase + DAQP_AI_FIFO_REG);
- outb((DAQP_FIFO_SIZE - threshold) >> 8, dev->iobase + DAQP_AI_FIFO_REG);
-
- /* Set trigger - continuous, internal */
- outb(DAQP_CTRL_TRIG_MODE | DAQP_CTRL_PACER_CLK_5MHZ |
- DAQP_CTRL_FIFO_INT_ENA, dev->iobase + DAQP_CTRL_REG);
-
- ret = daqp_clear_events(dev, 100);
- if (ret)
- return ret;
-
- /* Start conversion */
- outb(DAQP_CMD_ARM | DAQP_CMD_FIFO_DATA, dev->iobase + DAQP_CMD_REG);
-
- return 0;
-}
-
-static int daqp_ao_empty(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn,
- unsigned long context)
-{
- unsigned int status;
-
- status = inb(dev->iobase + DAQP_AUX_REG);
- if ((status & DAQP_AUX_DA_BUFFER) == 0)
- return 0;
- return -EBUSY;
-}
-
-static int daqp_ao_insn_write(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn,
- unsigned int *data)
-{
- struct daqp_private *devpriv = dev->private;
- unsigned int chan = CR_CHAN(insn->chanspec);
- int i;
-
- if (devpriv->stop)
- return -EIO;
-
- /* Make sure D/A update mode is direct update */
- outb(0, dev->iobase + DAQP_AUX_REG);
-
- for (i = 0; i < insn->n; i++) {
- unsigned int val = data[i];
- int ret;
-
- /* D/A transfer rate is about 8ms */
- ret = comedi_timeout(dev, s, insn, daqp_ao_empty, 0);
- if (ret)
- return ret;
-
- /* write the two's complement value to the channel */
- outw((chan << 12) | comedi_offset_munge(s, val),
- dev->iobase + DAQP_AO_REG);
-
- s->readback[chan] = val;
- }
-
- return insn->n;
-}
-
-static int daqp_di_insn_bits(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn,
- unsigned int *data)
-{
- struct daqp_private *devpriv = dev->private;
-
- if (devpriv->stop)
- return -EIO;
-
- data[0] = inb(dev->iobase + DAQP_DI_REG);
-
- return insn->n;
-}
-
-static int daqp_do_insn_bits(struct comedi_device *dev,
- struct comedi_subdevice *s,
- struct comedi_insn *insn,
- unsigned int *data)
-{
- struct daqp_private *devpriv = dev->private;
-
- if (devpriv->stop)
- return -EIO;
-
- if (comedi_dio_update_state(s, data))
- outb(s->state, dev->iobase + DAQP_DO_REG);
-
- data[1] = s->state;
-
- return insn->n;
-}
-
-static int daqp_auto_attach(struct comedi_device *dev,
- unsigned long context)
-{
- struct pcmcia_device *link = comedi_to_pcmcia_dev(dev);
- struct daqp_private *devpriv;
- struct comedi_subdevice *s;
- int ret;
-
- devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
- if (!devpriv)
- return -ENOMEM;
-
- link->config_flags |= CONF_AUTO_SET_IO | CONF_ENABLE_IRQ;
- ret = comedi_pcmcia_enable(dev, NULL);
- if (ret)
- return ret;
- dev->iobase = link->resource[0]->start;
-
- link->priv = dev;
- ret = pcmcia_request_irq(link, daqp_interrupt);
- if (ret == 0)
- dev->irq = link->irq;
-
- ret = comedi_alloc_subdevices(dev, 4);
- if (ret)
- return ret;
-
- s = &dev->subdevices[0];
- s->type = COMEDI_SUBD_AI;
- s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF;
- s->n_chan = 8;
- s->maxdata = 0xffff;
- s->range_table = &range_daqp_ai;
- s->insn_read = daqp_ai_insn_read;
- if (dev->irq) {
- dev->read_subdev = s;
- s->subdev_flags |= SDF_CMD_READ;
- s->len_chanlist = 2048;
- s->do_cmdtest = daqp_ai_cmdtest;
- s->do_cmd = daqp_ai_cmd;
- s->cancel = daqp_ai_cancel;
- }
-
- s = &dev->subdevices[1];
- s->type = COMEDI_SUBD_AO;
- s->subdev_flags = SDF_WRITABLE;
- s->n_chan = 2;
- s->maxdata = 0x0fff;
- s->range_table = &range_bipolar5;
- s->insn_write = daqp_ao_insn_write;
-
- ret = comedi_alloc_subdev_readback(s);
- if (ret)
- return ret;
-
- /*
- * Digital Input subdevice
- * NOTE: The digital input lines are shared:
- *
- * Chan Normal Mode Expansion Mode
- * ---- ----------------- ----------------------------
- * 0 DI0, ext. trigger Same as normal mode
- * 1 DI1 External gain select, lo bit
- * 2 DI2, ext. clock Same as normal mode
- * 3 DI3 External gain select, hi bit
- */
- s = &dev->subdevices[2];
- s->type = COMEDI_SUBD_DI;
- s->subdev_flags = SDF_READABLE;
- s->n_chan = 4;
- s->maxdata = 1;
- s->insn_bits = daqp_di_insn_bits;
-
- /*
- * Digital Output subdevice
- * NOTE: The digital output lines share the same pins on the
- * interface connector as the four external channel selection
- * bits. If expansion mode is used the digital outputs do not
- * work.
- */
- s = &dev->subdevices[3];
- s->type = COMEDI_SUBD_DO;
- s->subdev_flags = SDF_WRITABLE;
- s->n_chan = 4;
- s->maxdata = 1;
- s->insn_bits = daqp_do_insn_bits;
-
- return 0;
-}
-
-static struct comedi_driver driver_daqp = {
- .driver_name = "quatech_daqp_cs",
- .module = THIS_MODULE,
- .auto_attach = daqp_auto_attach,
- .detach = comedi_pcmcia_disable,
-};
-
-static int daqp_cs_suspend(struct pcmcia_device *link)
-{
- struct comedi_device *dev = link->priv;
- struct daqp_private *devpriv = dev ? dev->private : NULL;
-
- /* Mark the device as stopped, to block IO until later */
- if (devpriv)
- devpriv->stop = 1;
-
- return 0;
-}
-
-static int daqp_cs_resume(struct pcmcia_device *link)
-{
- struct comedi_device *dev = link->priv;
- struct daqp_private *devpriv = dev ? dev->private : NULL;
-
- if (devpriv)
- devpriv->stop = 0;
-
- return 0;
-}
-
-static int daqp_cs_attach(struct pcmcia_device *link)
-{
- return comedi_pcmcia_auto_config(link, &driver_daqp);
-}
-
-static const struct pcmcia_device_id daqp_cs_id_table[] = {
- PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0027),
- PCMCIA_DEVICE_NULL
-};
-MODULE_DEVICE_TABLE(pcmcia, daqp_cs_id_table);
-
-static struct pcmcia_driver daqp_cs_driver = {
- .name = "quatech_daqp_cs",
- .owner = THIS_MODULE,
- .id_table = daqp_cs_id_table,
- .probe = daqp_cs_attach,
- .remove = comedi_pcmcia_auto_unconfig,
- .suspend = daqp_cs_suspend,
- .resume = daqp_cs_resume,
-};
-module_comedi_pcmcia_driver(driver_daqp, daqp_cs_driver);
-
-MODULE_DESCRIPTION("Comedi driver for Quatech DAQP PCMCIA data capture cards");
-MODULE_AUTHOR("Brent Baccala <baccala@freesoft.org>");
-MODULE_LICENSE("GPL");
generated by cgit (git 2.34.1) at 2024-06-13 09:42:24 +0000