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path: root/drivers/staging/comedi/drivers/das08.c
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Diffstat (limited to 'drivers/staging/comedi/drivers/das08.c')
-rw-r--r--drivers/staging/comedi/drivers/das08.c489
1 files changed, 489 insertions, 0 deletions
diff --git a/drivers/staging/comedi/drivers/das08.c b/drivers/staging/comedi/drivers/das08.c
new file mode 100644
index 000000000..73f4c8dbb
--- /dev/null
+++ b/drivers/staging/comedi/drivers/das08.c
@@ -0,0 +1,489 @@
+/*
+ * comedi/drivers/das08.c
+ * comedi module for common DAS08 support (used by ISA/PCI/PCMCIA drivers)
+ *
+ * COMEDI - Linux Control and Measurement Device Interface
+ * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
+ * Copyright (C) 2001,2002,2003 Frank Mori Hess <fmhess@users.sourceforge.net>
+ * Copyright (C) 2004 Salvador E. Tropea <set@users.sf.net> <set@ieee.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.
+ */
+
+#include <linux/module.h>
+
+#include "../comedidev.h"
+
+#include "8255.h"
+#include "comedi_8254.h"
+#include "das08.h"
+
+/*
+ cio-das08.pdf
+
+ "isa-das08"
+
+ 0 a/d bits 0-3 start 8 bit
+ 1 a/d bits 4-11 start 12 bit
+ 2 eoc, ip1-3, irq, mux op1-4, inte, mux
+ 3 unused unused
+ 4567 8254
+ 89ab 8255
+
+ requires hard-wiring for async ai
+
+*/
+
+#define DAS08_LSB 0
+#define DAS08_MSB 1
+#define DAS08_TRIG_12BIT 1
+#define DAS08_STATUS 2
+#define DAS08_EOC (1<<7)
+#define DAS08_IRQ (1<<3)
+#define DAS08_IP(x) (((x)>>4)&0x7)
+#define DAS08_CONTROL 2
+#define DAS08_MUX_MASK 0x7
+#define DAS08_MUX(x) ((x) & DAS08_MUX_MASK)
+#define DAS08_INTE (1<<3)
+#define DAS08_DO_MASK 0xf0
+#define DAS08_OP(x) (((x) << 4) & DAS08_DO_MASK)
+
+/*
+ cio-das08jr.pdf
+
+ "das08/jr-ao"
+
+ 0 a/d bits 0-3 unused
+ 1 a/d bits 4-11 start 12 bit
+ 2 eoc, mux mux
+ 3 di do
+ 4 unused ao0_lsb
+ 5 unused ao0_msb
+ 6 unused ao1_lsb
+ 7 unused ao1_msb
+
+*/
+
+#define DAS08JR_DIO 3
+#define DAS08JR_AO_LSB(x) ((x) ? 6 : 4)
+#define DAS08JR_AO_MSB(x) ((x) ? 7 : 5)
+
+/*
+ cio-das08_aox.pdf
+
+ "das08-aoh"
+ "das08-aol"
+ "das08-aom"
+
+ 0 a/d bits 0-3 start 8 bit
+ 1 a/d bits 4-11 start 12 bit
+ 2 eoc, ip1-3, irq, mux op1-4, inte, mux
+ 3 mux, gain status gain control
+ 4567 8254
+ 8 unused ao0_lsb
+ 9 unused ao0_msb
+ a unused ao1_lsb
+ b unused ao1_msb
+ 89ab
+ cdef 8255
+*/
+
+#define DAS08AO_GAIN_CONTROL 3
+#define DAS08AO_GAIN_STATUS 3
+
+#define DAS08AO_AO_LSB(x) ((x) ? 0xa : 8)
+#define DAS08AO_AO_MSB(x) ((x) ? 0xb : 9)
+#define DAS08AO_AO_UPDATE 8
+
+/* gainlist same as _pgx_ below */
+
+static const struct comedi_lrange range_das08_pgl = {
+ 9, {
+ BIP_RANGE(10),
+ 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)
+ }
+};
+
+static const struct comedi_lrange range_das08_pgh = {
+ 12, {
+ BIP_RANGE(10),
+ BIP_RANGE(5),
+ BIP_RANGE(1),
+ BIP_RANGE(0.5),
+ BIP_RANGE(0.1),
+ BIP_RANGE(0.05),
+ BIP_RANGE(0.01),
+ BIP_RANGE(0.005),
+ UNI_RANGE(10),
+ UNI_RANGE(1),
+ UNI_RANGE(0.1),
+ UNI_RANGE(0.01)
+ }
+};
+
+static const struct comedi_lrange range_das08_pgm = {
+ 9, {
+ BIP_RANGE(10),
+ BIP_RANGE(5),
+ BIP_RANGE(0.5),
+ BIP_RANGE(0.05),
+ BIP_RANGE(0.01),
+ UNI_RANGE(10),
+ UNI_RANGE(1),
+ UNI_RANGE(0.1),
+ UNI_RANGE(0.01)
+ }
+}; /*
+ cio-das08jr.pdf
+
+ "das08/jr-ao"
+
+ 0 a/d bits 0-3 unused
+ 1 a/d bits 4-11 start 12 bit
+ 2 eoc, mux mux
+ 3 di do
+ 4 unused ao0_lsb
+ 5 unused ao0_msb
+ 6 unused ao1_lsb
+ 7 unused ao1_msb
+
+ */
+
+static const struct comedi_lrange *const das08_ai_lranges[] = {
+ &range_unknown,
+ &range_bipolar5,
+ &range_das08_pgh,
+ &range_das08_pgl,
+ &range_das08_pgm,
+};
+
+static const int das08_pgh_gainlist[] = {
+ 8, 0, 10, 2, 12, 4, 14, 6, 1, 3, 5, 7
+};
+static const int das08_pgl_gainlist[] = { 8, 0, 2, 4, 6, 1, 3, 5, 7 };
+static const int das08_pgm_gainlist[] = { 8, 0, 10, 12, 14, 9, 11, 13, 15 };
+
+static const int *const das08_gainlists[] = {
+ NULL,
+ NULL,
+ das08_pgh_gainlist,
+ das08_pgl_gainlist,
+ das08_pgm_gainlist,
+};
+
+static int das08_ai_eoc(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned long context)
+{
+ unsigned int status;
+
+ status = inb(dev->iobase + DAS08_STATUS);
+ if ((status & DAS08_EOC) == 0)
+ return 0;
+ return -EBUSY;
+}
+
+static int das08_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data)
+{
+ const struct das08_board_struct *thisboard = dev->board_ptr;
+ struct das08_private_struct *devpriv = dev->private;
+ int n;
+ int chan;
+ int range;
+ int lsb, msb;
+ int ret;
+
+ chan = CR_CHAN(insn->chanspec);
+ range = CR_RANGE(insn->chanspec);
+
+ /* clear crap */
+ inb(dev->iobase + DAS08_LSB);
+ inb(dev->iobase + DAS08_MSB);
+
+ /* set multiplexer */
+ /* lock to prevent race with digital output */
+ spin_lock(&dev->spinlock);
+ devpriv->do_mux_bits &= ~DAS08_MUX_MASK;
+ devpriv->do_mux_bits |= DAS08_MUX(chan);
+ outb(devpriv->do_mux_bits, dev->iobase + DAS08_CONTROL);
+ spin_unlock(&dev->spinlock);
+
+ if (s->range_table->length > 1) {
+ /* set gain/range */
+ range = CR_RANGE(insn->chanspec);
+ outb(devpriv->pg_gainlist[range],
+ dev->iobase + DAS08AO_GAIN_CONTROL);
+ }
+
+ for (n = 0; n < insn->n; n++) {
+ /* clear over-range bits for 16-bit boards */
+ if (thisboard->ai_nbits == 16)
+ if (inb(dev->iobase + DAS08_MSB) & 0x80)
+ dev_info(dev->class_dev, "over-range\n");
+
+ /* trigger conversion */
+ outb_p(0, dev->iobase + DAS08_TRIG_12BIT);
+
+ ret = comedi_timeout(dev, s, insn, das08_ai_eoc, 0);
+ if (ret)
+ return ret;
+
+ msb = inb(dev->iobase + DAS08_MSB);
+ lsb = inb(dev->iobase + DAS08_LSB);
+ if (thisboard->ai_encoding == das08_encode12) {
+ data[n] = (lsb >> 4) | (msb << 4);
+ } else if (thisboard->ai_encoding == das08_pcm_encode12) {
+ data[n] = (msb << 8) + lsb;
+ } else if (thisboard->ai_encoding == das08_encode16) {
+ /* FPOS 16-bit boards are sign-magnitude */
+ if (msb & 0x80)
+ data[n] = (1 << 15) | lsb | ((msb & 0x7f) << 8);
+ else
+ data[n] = (1 << 15) - (lsb | (msb & 0x7f) << 8);
+ } else {
+ dev_err(dev->class_dev, "bug! unknown ai encoding\n");
+ return -1;
+ }
+ }
+
+ return n;
+}
+
+static int das08_di_rbits(struct comedi_device *dev, struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data)
+{
+ data[0] = 0;
+ data[1] = DAS08_IP(inb(dev->iobase + DAS08_STATUS));
+
+ return insn->n;
+}
+
+static int das08_do_wbits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct das08_private_struct *devpriv = dev->private;
+
+ if (comedi_dio_update_state(s, data)) {
+ /* prevent race with setting of analog input mux */
+ spin_lock(&dev->spinlock);
+ devpriv->do_mux_bits &= ~DAS08_DO_MASK;
+ devpriv->do_mux_bits |= DAS08_OP(s->state);
+ outb(devpriv->do_mux_bits, dev->iobase + DAS08_CONTROL);
+ spin_unlock(&dev->spinlock);
+ }
+
+ data[1] = s->state;
+
+ return insn->n;
+}
+
+static int das08jr_di_rbits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data)
+{
+ data[0] = 0;
+ data[1] = inb(dev->iobase + DAS08JR_DIO);
+
+ return insn->n;
+}
+
+static int das08jr_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 + DAS08JR_DIO);
+
+ data[1] = s->state;
+
+ return insn->n;
+}
+
+static void das08_ao_set_data(struct comedi_device *dev,
+ unsigned int chan, unsigned int data)
+{
+ const struct das08_board_struct *thisboard = dev->board_ptr;
+ unsigned char lsb;
+ unsigned char msb;
+
+ lsb = data & 0xff;
+ msb = (data >> 8) & 0xff;
+ if (thisboard->is_jr) {
+ outb(lsb, dev->iobase + DAS08JR_AO_LSB(chan));
+ outb(msb, dev->iobase + DAS08JR_AO_MSB(chan));
+ /* load DACs */
+ inb(dev->iobase + DAS08JR_DIO);
+ } else {
+ outb(lsb, dev->iobase + DAS08AO_AO_LSB(chan));
+ outb(msb, dev->iobase + DAS08AO_AO_MSB(chan));
+ /* load DACs */
+ inb(dev->iobase + DAS08AO_AO_UPDATE);
+ }
+}
+
+static int das08_ao_insn_write(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ unsigned int chan = CR_CHAN(insn->chanspec);
+ unsigned int val = s->readback[chan];
+ int i;
+
+ for (i = 0; i < insn->n; i++) {
+ val = data[i];
+ das08_ao_set_data(dev, chan, val);
+ }
+ s->readback[chan] = val;
+
+ return insn->n;
+}
+
+int das08_common_attach(struct comedi_device *dev, unsigned long iobase)
+{
+ const struct das08_board_struct *thisboard = dev->board_ptr;
+ struct das08_private_struct *devpriv = dev->private;
+ struct comedi_subdevice *s;
+ int ret;
+ int i;
+
+ dev->iobase = iobase;
+
+ dev->board_name = thisboard->name;
+
+ ret = comedi_alloc_subdevices(dev, 6);
+ if (ret)
+ return ret;
+
+ s = &dev->subdevices[0];
+ /* ai */
+ if (thisboard->ai_nbits) {
+ s->type = COMEDI_SUBD_AI;
+ /* XXX some boards actually have differential
+ * inputs instead of single ended.
+ * The driver does nothing with arefs though,
+ * so it's no big deal.
+ */
+ s->subdev_flags = SDF_READABLE | SDF_GROUND;
+ s->n_chan = 8;
+ s->maxdata = (1 << thisboard->ai_nbits) - 1;
+ s->range_table = das08_ai_lranges[thisboard->ai_pg];
+ s->insn_read = das08_ai_rinsn;
+ devpriv->pg_gainlist = das08_gainlists[thisboard->ai_pg];
+ } else {
+ s->type = COMEDI_SUBD_UNUSED;
+ }
+
+ s = &dev->subdevices[1];
+ /* ao */
+ if (thisboard->ao_nbits) {
+ s->type = COMEDI_SUBD_AO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = 2;
+ s->maxdata = (1 << thisboard->ao_nbits) - 1;
+ s->range_table = &range_bipolar5;
+ s->insn_write = das08_ao_insn_write;
+
+ ret = comedi_alloc_subdev_readback(s);
+ if (ret)
+ return ret;
+
+ /* initialize all channels to 0V */
+ for (i = 0; i < s->n_chan; i++) {
+ s->readback[i] = s->maxdata / 2;
+ das08_ao_set_data(dev, i, s->readback[i]);
+ }
+ } else {
+ s->type = COMEDI_SUBD_UNUSED;
+ }
+
+ s = &dev->subdevices[2];
+ /* di */
+ if (thisboard->di_nchan) {
+ s->type = COMEDI_SUBD_DI;
+ s->subdev_flags = SDF_READABLE;
+ s->n_chan = thisboard->di_nchan;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits =
+ thisboard->is_jr ? das08jr_di_rbits : das08_di_rbits;
+ } else {
+ s->type = COMEDI_SUBD_UNUSED;
+ }
+
+ s = &dev->subdevices[3];
+ /* do */
+ if (thisboard->do_nchan) {
+ s->type = COMEDI_SUBD_DO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = thisboard->do_nchan;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits =
+ thisboard->is_jr ? das08jr_do_wbits : das08_do_wbits;
+ } else {
+ s->type = COMEDI_SUBD_UNUSED;
+ }
+
+ s = &dev->subdevices[4];
+ /* 8255 */
+ if (thisboard->i8255_offset != 0) {
+ ret = subdev_8255_init(dev, s, NULL, thisboard->i8255_offset);
+ if (ret)
+ return ret;
+ } else {
+ s->type = COMEDI_SUBD_UNUSED;
+ }
+
+ /* Counter subdevice (8254) */
+ s = &dev->subdevices[5];
+ if (thisboard->i8254_offset) {
+ dev->pacer = comedi_8254_init(dev->iobase +
+ thisboard->i8254_offset,
+ 0, I8254_IO8, 0);
+ if (!dev->pacer)
+ return -ENOMEM;
+
+ comedi_8254_subdevice_init(s, dev->pacer);
+ } else {
+ s->type = COMEDI_SUBD_UNUSED;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(das08_common_attach);
+
+static int __init das08_init(void)
+{
+ return 0;
+}
+module_init(das08_init);
+
+static void __exit das08_exit(void)
+{
+}
+module_exit(das08_exit);
+
+MODULE_AUTHOR("Comedi http://www.comedi.org");
+MODULE_DESCRIPTION("Comedi low-level driver");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-08-17 20:22:20 +0000