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-rw-r--r--drivers/staging/comedi/drivers/pcl711.c619
1 files changed, 619 insertions, 0 deletions
diff --git a/drivers/staging/comedi/drivers/pcl711.c b/drivers/staging/comedi/drivers/pcl711.c
new file mode 100644
index 00000000000..15491745288
--- /dev/null
+++ b/drivers/staging/comedi/drivers/pcl711.c
@@ -0,0 +1,619 @@
+/*
+ comedi/drivers/pcl711.c
+ hardware driver for PC-LabCard PCL-711 and AdSys ACL-8112
+ and compatibles
+
+ COMEDI - Linux Control and Measurement Device Interface
+ Copyright (C) 1998 David A. Schleef <ds@schleef.org>
+ Janne Jalkanen <jalkanen@cs.hut.fi>
+ Eric Bunn <ebu@cs.hut.fi>
+
+ 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: pcl711
+Description: Advantech PCL-711 and 711b, ADLink ACL-8112
+Author: ds, Janne Jalkanen <jalkanen@cs.hut.fi>, Eric Bunn <ebu@cs.hut.fi>
+Status: mostly complete
+Devices: [Advantech] PCL-711 (pcl711), PCL-711B (pcl711b),
+ [AdLink] ACL-8112HG (acl8112hg), ACL-8112DG (acl8112dg)
+
+Since these boards do not have DMA or FIFOs, only immediate mode is
+supported.
+
+*/
+
+/*
+ Dave Andruczyk <dave@tech.buffalostate.edu> also wrote a
+ driver for the PCL-711. I used a few ideas from his driver
+ here. His driver also has more comments, if you are
+ interested in understanding how this driver works.
+ http://tech.buffalostate.edu/~dave/driver/
+
+ The ACL-8112 driver was hacked from the sources of the PCL-711
+ driver (the 744 chip used on the 8112 is almost the same as
+ the 711b chip, but it has more I/O channels) by
+ Janne Jalkanen (jalkanen@cs.hut.fi) and
+ Erik Bunn (ebu@cs.hut.fi). Remerged with the PCL-711 driver
+ by ds.
+
+ [acl-8112]
+ This driver supports both TRIGNOW and TRIGCLK,
+ but does not yet support DMA transfers. It also supports
+ both high (HG) and low (DG) versions of the card, though
+ the HG version has been untested.
+
+ */
+
+#include "../comedidev.h"
+
+#include <linux/ioport.h>
+#include <linux/delay.h>
+
+#include "8253.h"
+
+#define PCL711_SIZE 16
+
+#define PCL711_CTR0 0
+#define PCL711_CTR1 1
+#define PCL711_CTR2 2
+#define PCL711_CTRCTL 3
+#define PCL711_AD_LO 4
+#define PCL711_DA0_LO 4
+#define PCL711_AD_HI 5
+#define PCL711_DA0_HI 5
+#define PCL711_DI_LO 6
+#define PCL711_DA1_LO 6
+#define PCL711_DI_HI 7
+#define PCL711_DA1_HI 7
+#define PCL711_CLRINTR 8
+#define PCL711_GAIN 9
+#define PCL711_MUX 10
+#define PCL711_MODE 11
+#define PCL711_SOFTTRIG 12
+#define PCL711_DO_LO 13
+#define PCL711_DO_HI 14
+
+static const comedi_lrange range_pcl711b_ai = { 5, {
+ BIP_RANGE(5),
+ BIP_RANGE(2.5),
+ BIP_RANGE(1.25),
+ BIP_RANGE(0.625),
+ BIP_RANGE(0.3125)
+ }
+};
+static const comedi_lrange range_acl8112hg_ai = { 12, {
+ BIP_RANGE(5),
+ BIP_RANGE(0.5),
+ BIP_RANGE(0.05),
+ BIP_RANGE(0.005),
+ UNI_RANGE(10),
+ UNI_RANGE(1),
+ UNI_RANGE(0.1),
+ UNI_RANGE(0.01),
+ BIP_RANGE(10),
+ BIP_RANGE(1),
+ BIP_RANGE(0.1),
+ BIP_RANGE(0.01)
+ }
+};
+static const comedi_lrange range_acl8112dg_ai = { 9, {
+ BIP_RANGE(5),
+ BIP_RANGE(2.5),
+ BIP_RANGE(1.25),
+ BIP_RANGE(0.625),
+ UNI_RANGE(10),
+ UNI_RANGE(5),
+ UNI_RANGE(2.5),
+ UNI_RANGE(1.25),
+ BIP_RANGE(10)
+ }
+};
+
+/*
+ * flags
+ */
+
+#define PCL711_TIMEOUT 100
+#define PCL711_DRDY 0x10
+
+static const int i8253_osc_base = 500; /* 2 Mhz */
+
+typedef struct {
+ const char *name;
+ int is_pcl711b;
+ int is_8112;
+ int is_dg;
+ int n_ranges;
+ int n_aichan;
+ int n_aochan;
+ int maxirq;
+ const comedi_lrange *ai_range_type;
+} boardtype;
+
+static const boardtype boardtypes[] = {
+ {"pcl711", 0, 0, 0, 5, 8, 1, 0, &range_bipolar5},
+ {"pcl711b", 1, 0, 0, 5, 8, 1, 7, &range_pcl711b_ai},
+ {"acl8112hg", 0, 1, 0, 12, 16, 2, 15, &range_acl8112hg_ai},
+ {"acl8112dg", 0, 1, 1, 9, 16, 2, 15, &range_acl8112dg_ai},
+};
+
+#define n_boardtypes (sizeof(boardtypes)/sizeof(boardtype))
+#define this_board ((const boardtype *)dev->board_ptr)
+
+static int pcl711_attach(comedi_device * dev, comedi_devconfig * it);
+static int pcl711_detach(comedi_device * dev);
+static comedi_driver driver_pcl711 = {
+ driver_name:"pcl711",
+ module:THIS_MODULE,
+ attach:pcl711_attach,
+ detach:pcl711_detach,
+ board_name:&boardtypes[0].name,
+ num_names:n_boardtypes,
+ offset:sizeof(boardtype),
+};
+
+COMEDI_INITCLEANUP(driver_pcl711);
+
+typedef struct {
+ int board;
+ int adchan;
+ int ntrig;
+ int aip[8];
+ int mode;
+ lsampl_t ao_readback[2];
+ unsigned int divisor1;
+ unsigned int divisor2;
+} pcl711_private;
+
+#define devpriv ((pcl711_private *)dev->private)
+
+static irqreturn_t pcl711_interrupt(int irq, void *d PT_REGS_ARG)
+{
+ int lo, hi;
+ int data;
+ comedi_device *dev = d;
+ comedi_subdevice *s = dev->subdevices + 0;
+
+ if (!dev->attached) {
+ comedi_error(dev, "spurious interrupt");
+ return IRQ_HANDLED;
+ }
+
+ hi = inb(dev->iobase + PCL711_AD_HI);
+ lo = inb(dev->iobase + PCL711_AD_LO);
+ outb(0, dev->iobase + PCL711_CLRINTR);
+
+ data = (hi << 8) | lo;
+
+ /* FIXME! Nothing else sets ntrig! */
+ if (!(--devpriv->ntrig)) {
+ if (this_board->is_8112) {
+ outb(1, dev->iobase + PCL711_MODE);
+ } else {
+ outb(0, dev->iobase + PCL711_MODE);
+ }
+
+ s->async->events |= COMEDI_CB_EOA;
+ }
+ comedi_event(dev, s);
+ return IRQ_HANDLED;
+}
+
+static void pcl711_set_changain(comedi_device * dev, int chan)
+{
+ int chan_register;
+
+ outb(CR_RANGE(chan), dev->iobase + PCL711_GAIN);
+
+ chan_register = CR_CHAN(chan);
+
+ if (this_board->is_8112) {
+
+ /*
+ * Set the correct channel. The two channel banks are switched
+ * using the mask value.
+ * NB: To use differential channels, you should use mask = 0x30,
+ * but I haven't written the support for this yet. /JJ
+ */
+
+ if (chan_register >= 8) {
+ chan_register = 0x20 | (chan_register & 0x7);
+ } else {
+ chan_register |= 0x10;
+ }
+ } else {
+ outb(chan_register, dev->iobase + PCL711_MUX);
+ }
+}
+
+static int pcl711_ai_insn(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ int i, n;
+ int hi, lo;
+
+ pcl711_set_changain(dev, insn->chanspec);
+
+ for (n = 0; n < insn->n; n++) {
+ /*
+ * Write the correct mode (software polling) and start polling by writing
+ * to the trigger register
+ */
+ outb(1, dev->iobase + PCL711_MODE);
+
+ if (this_board->is_8112) {
+ } else {
+ outb(0, dev->iobase + PCL711_SOFTTRIG);
+ }
+
+ i = PCL711_TIMEOUT;
+ while (--i) {
+ hi = inb(dev->iobase + PCL711_AD_HI);
+ if (!(hi & PCL711_DRDY))
+ goto ok;
+ comedi_udelay(1);
+ }
+ rt_printk("comedi%d: pcl711: A/D timeout\n", dev->minor);
+ return -ETIME;
+
+ ok:
+ lo = inb(dev->iobase + PCL711_AD_LO);
+
+ data[n] = ((hi & 0xf) << 8) | lo;
+ }
+
+ return n;
+}
+
+static int pcl711_ai_cmdtest(comedi_device * dev, comedi_subdevice * s,
+ comedi_cmd * cmd)
+{
+ int tmp;
+ int err = 0;
+
+ /* step 1 */
+ tmp = cmd->start_src;
+ cmd->start_src &= TRIG_NOW;
+ if (!cmd->start_src || tmp != cmd->start_src)
+ err++;
+
+ tmp = cmd->scan_begin_src;
+ cmd->scan_begin_src &= TRIG_TIMER | TRIG_EXT;
+ if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
+ err++;
+
+ tmp = cmd->convert_src;
+ cmd->convert_src &= TRIG_NOW;
+ 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 */
+
+ if (cmd->scan_begin_src != TRIG_TIMER &&
+ cmd->scan_begin_src != TRIG_EXT)
+ err++;
+ if (cmd->stop_src != TRIG_COUNT && cmd->stop_src != TRIG_NONE)
+ err++;
+
+ if (err)
+ return 2;
+
+ /* step 3 */
+
+ if (cmd->start_arg != 0) {
+ cmd->start_arg = 0;
+ err++;
+ }
+ if (cmd->scan_begin_src == TRIG_EXT) {
+ if (cmd->scan_begin_arg != 0) {
+ cmd->scan_begin_arg = 0;
+ err++;
+ }
+ } else {
+#define MAX_SPEED 1000
+#define TIMER_BASE 100
+ if (cmd->scan_begin_arg < MAX_SPEED) {
+ cmd->scan_begin_arg = MAX_SPEED;
+ err++;
+ }
+ }
+ if (cmd->convert_arg != 0) {
+ cmd->convert_arg = 0;
+ err++;
+ }
+ if (cmd->scan_end_arg != cmd->chanlist_len) {
+ cmd->scan_end_arg = cmd->chanlist_len;
+ err++;
+ }
+ if (cmd->stop_src == TRIG_NONE) {
+ if (cmd->stop_arg != 0) {
+ cmd->stop_arg = 0;
+ err++;
+ }
+ } else {
+ /* ignore */
+ }
+
+ if (err)
+ return 3;
+
+ /* step 4 */
+
+ if (cmd->scan_begin_src == TRIG_TIMER) {
+ tmp = cmd->scan_begin_arg;
+ i8253_cascade_ns_to_timer_2div(TIMER_BASE,
+ &devpriv->divisor1, &devpriv->divisor2,
+ &cmd->scan_begin_arg, cmd->flags & TRIG_ROUND_MASK);
+ if (tmp != cmd->scan_begin_arg)
+ err++;
+ }
+
+ if (err)
+ return 4;
+
+ return 0;
+}
+
+static int pcl711_ai_cmd(comedi_device * dev, comedi_subdevice * s)
+{
+ int timer1, timer2;
+ comedi_cmd *cmd = &s->async->cmd;
+
+ pcl711_set_changain(dev, cmd->chanlist[0]);
+
+ if (cmd->scan_begin_src == TRIG_TIMER) {
+ /*
+ * Set timers
+ * timer chip is an 8253, with timers 1 and 2
+ * cascaded
+ * 0x74 = Select Counter 1 | LSB/MSB | Mode=2 | Binary
+ * Mode 2 = Rate generator
+ *
+ * 0xb4 = Select Counter 2 | LSB/MSB | Mode=2 | Binary
+ */
+
+ i8253_cascade_ns_to_timer(i8253_osc_base, &timer1, &timer2,
+ &cmd->scan_begin_arg, TRIG_ROUND_NEAREST);
+
+ outb(0x74, dev->iobase + PCL711_CTRCTL);
+ outb(timer1 & 0xff, dev->iobase + PCL711_CTR1);
+ outb((timer1 >> 8) & 0xff, dev->iobase + PCL711_CTR1);
+ outb(0xb4, dev->iobase + PCL711_CTRCTL);
+ outb(timer2 & 0xff, dev->iobase + PCL711_CTR2);
+ outb((timer2 >> 8) & 0xff, dev->iobase + PCL711_CTR2);
+
+ /* clear pending interrupts (just in case) */
+ outb(0, dev->iobase + PCL711_CLRINTR);
+
+ /*
+ * Set mode to IRQ transfer
+ */
+ outb(devpriv->mode | 6, dev->iobase + PCL711_MODE);
+ } else {
+ /* external trigger */
+ outb(devpriv->mode | 3, dev->iobase + PCL711_MODE);
+ }
+
+ return 0;
+}
+
+/*
+ analog output
+*/
+static int pcl711_ao_insn(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ int n;
+ int chan = CR_CHAN(insn->chanspec);
+
+ for (n = 0; n < insn->n; n++) {
+ outb((data[n] & 0xff),
+ dev->iobase + (chan ? PCL711_DA1_LO : PCL711_DA0_LO));
+ outb((data[n] >> 8),
+ dev->iobase + (chan ? PCL711_DA1_HI : PCL711_DA0_HI));
+
+ devpriv->ao_readback[chan] = data[n];
+ }
+
+ return n;
+}
+
+static int pcl711_ao_insn_read(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ int n;
+ int chan = CR_CHAN(insn->chanspec);
+
+ for (n = 0; n < insn->n; n++) {
+ data[n] = devpriv->ao_readback[chan];
+ }
+
+ return n;
+
+}
+
+/* Digital port read - Untested on 8112 */
+static int pcl711_di_insn_bits(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ if (insn->n != 2)
+ return -EINVAL;
+
+ data[1] = inb(dev->iobase + PCL711_DI_LO) |
+ (inb(dev->iobase + PCL711_DI_HI) << 8);
+
+ return 2;
+}
+
+/* Digital port write - Untested on 8112 */
+static int pcl711_do_insn_bits(comedi_device * dev, comedi_subdevice * s,
+ comedi_insn * insn, lsampl_t * data)
+{
+ if (insn->n != 2)
+ return -EINVAL;
+
+ if (data[0]) {
+ s->state &= ~data[0];
+ s->state |= data[0] & data[1];
+ }
+ if (data[0] & 0x00ff)
+ outb(s->state & 0xff, dev->iobase + PCL711_DO_LO);
+ if (data[0] & 0xff00)
+ outb((s->state >> 8), dev->iobase + PCL711_DO_HI);
+
+ data[1] = s->state;
+
+ return 2;
+}
+
+/* Free any resources that we have claimed */
+static int pcl711_detach(comedi_device * dev)
+{
+ printk("comedi%d: pcl711: remove\n", dev->minor);
+
+ if (dev->irq)
+ comedi_free_irq(dev->irq, dev);
+
+ if (dev->iobase)
+ release_region(dev->iobase, PCL711_SIZE);
+
+ return 0;
+}
+
+/* Initialization */
+static int pcl711_attach(comedi_device * dev, comedi_devconfig * it)
+{
+ int ret;
+ unsigned long iobase;
+ unsigned int irq;
+ comedi_subdevice *s;
+
+ /* claim our I/O space */
+
+ iobase = it->options[0];
+ printk("comedi%d: pcl711: 0x%04lx ", dev->minor, iobase);
+ if (!request_region(iobase, PCL711_SIZE, "pcl711")) {
+ printk("I/O port conflict\n");
+ return -EIO;
+ }
+ dev->iobase = iobase;
+
+ /* there should be a sanity check here */
+
+ /* set up some name stuff */
+ dev->board_name = this_board->name;
+
+ /* grab our IRQ */
+ irq = it->options[1];
+ if (irq > this_board->maxirq) {
+ printk("irq out of range\n");
+ return -EINVAL;
+ }
+ if (irq) {
+ if (comedi_request_irq(irq, pcl711_interrupt, 0, "pcl711", dev)) {
+ printk("unable to allocate irq %u\n", irq);
+ return -EINVAL;
+ } else {
+ printk("( irq = %u )\n", irq);
+ }
+ }
+ dev->irq = irq;
+
+ if ((ret = alloc_subdevices(dev, 4)) < 0)
+ return ret;
+ if ((ret = alloc_private(dev, sizeof(pcl711_private))) < 0)
+ return ret;
+
+ s = dev->subdevices + 0;
+ /* AI subdevice */
+ s->type = COMEDI_SUBD_AI;
+ s->subdev_flags = SDF_READABLE | SDF_GROUND;
+ s->n_chan = this_board->n_aichan;
+ s->maxdata = 0xfff;
+ s->len_chanlist = 1;
+ s->range_table = this_board->ai_range_type;
+ s->insn_read = pcl711_ai_insn;
+ if (irq) {
+ dev->read_subdev = s;
+ s->subdev_flags |= SDF_CMD_READ;
+ s->do_cmdtest = pcl711_ai_cmdtest;
+ s->do_cmd = pcl711_ai_cmd;
+ }
+
+ s++;
+ /* AO subdevice */
+ s->type = COMEDI_SUBD_AO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = this_board->n_aochan;
+ s->maxdata = 0xfff;
+ s->len_chanlist = 1;
+ s->range_table = &range_bipolar5;
+ s->insn_write = pcl711_ao_insn;
+ s->insn_read = pcl711_ao_insn_read;
+
+ s++;
+ /* 16-bit digital input */
+ s->type = COMEDI_SUBD_DI;
+ s->subdev_flags = SDF_READABLE;
+ s->n_chan = 16;
+ s->maxdata = 1;
+ s->len_chanlist = 16;
+ s->range_table = &range_digital;
+ s->insn_bits = pcl711_di_insn_bits;
+
+ s++;
+ /* 16-bit digital out */
+ s->type = COMEDI_SUBD_DO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = 16;
+ s->maxdata = 1;
+ s->len_chanlist = 16;
+ s->range_table = &range_digital;
+ s->state = 0;
+ s->insn_bits = pcl711_do_insn_bits;
+
+ /*
+ this is the "base value" for the mode register, which is
+ used for the irq on the PCL711
+ */
+ if (this_board->is_pcl711b) {
+ devpriv->mode = (dev->irq << 4);
+ }
+
+ /* clear DAC */
+ outb(0, dev->iobase + PCL711_DA0_LO);
+ outb(0, dev->iobase + PCL711_DA0_HI);
+ outb(0, dev->iobase + PCL711_DA1_LO);
+ outb(0, dev->iobase + PCL711_DA1_HI);
+
+ printk("\n");
+
+ return 0;
+}
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