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path: root/drivers/staging/comedi/drivers/ii_pci20kc.c
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Diffstat (limited to 'drivers/staging/comedi/drivers/ii_pci20kc.c')
-rw-r--r--drivers/staging/comedi/drivers/ii_pci20kc.c612
1 files changed, 612 insertions, 0 deletions
diff --git a/drivers/staging/comedi/drivers/ii_pci20kc.c b/drivers/staging/comedi/drivers/ii_pci20kc.c
new file mode 100644
index 000000000000..80825ba25418
--- /dev/null
+++ b/drivers/staging/comedi/drivers/ii_pci20kc.c
@@ -0,0 +1,612 @@
+/*
+ * comedi/drivers/ii_pci20kc.c
+ * Driver for Intelligent Instruments PCI-20001C carrier board
+ * and modules.
+ *
+ * Copyright (C) 2000 Markus Kempf <kempf@matsci.uni-sb.de>
+ * with suggestions from David Schleef
+ * 16.06.2000
+ *
+ * Linux device driver for COMEDI
+ * Intelligent Instrumentation
+ * PCI-20001 C-2A Carrier Board
+ * PCI-20341 M-1A 16-Bit analog input module
+ * - differential
+ * - range (-5V - +5V)
+ * - 16 bit
+ * PCI-20006 M-2 16-Bit analog output module
+ * - ranges (-10V - +10V) (0V - +10V) (-5V - +5V)
+ * - 16 bit
+ *
+ * only ONE PCI-20341 module possible
+ * only ONE PCI-20006 module possible
+ * no extern trigger implemented
+ *
+ * NOT WORKING (but soon) only 4 on-board differential channels supported
+ * NOT WORKING (but soon) only ONE di-port and ONE do-port supported instead of 4 digital ports
+ * di-port == Port 0
+ * do-port == Port 1
+ *
+ * The state of this driver is only a starting point for a complete
+ * COMEDI-driver. The final driver should support all features of the
+ * carrier board and modules.
+ *
+ * The test configuration:
+ *
+ * kernel 2.2.14 with RTAI v1.2 and patch-2.2.14rthal2
+ * COMEDI 0.7.45
+ * COMEDILIB 0.7.9
+ *
+ */
+/*
+Driver: ii_pci20kc
+Description: Intelligent Instruments PCI-20001C carrier board
+Author: Markus Kempf <kempf@matsci.uni-sb.de>
+Devices: [Intelligent Instrumentation] PCI-20001C (ii_pci20kc)
+Status: works
+
+Supports the PCI-20001 C-2a Carrier board, and could probably support
+the other carrier boards with small modifications. Modules supported
+are:
+ PCI-20006 M-2 16-bit analog output module
+ PCI-20341 M-1A 16-bit analog input module
+
+Options:
+ 0 Board base address
+ 1 IRQ
+ 2 first option for module 1
+ 3 second option for module 1
+ 4 first option for module 2
+ 5 second option for module 2
+ 6 first option for module 3
+ 7 second option for module 3
+
+options for PCI-20006M:
+ first: Analog output channel 0 range configuration
+ 0 bipolar 10 (-10V -- +10V)
+ 1 unipolar 10 (0V -- +10V)
+ 2 bipolar 5 (-5V -- 5V)
+ second: Analog output channel 1 range configuration
+
+options for PCI-20341M:
+ first: Analog input gain configuration
+ 0 1
+ 1 10
+ 2 100
+ 3 200
+*/
+
+/* XXX needs to use ioremap() for compatibility with 2.4 kernels. Should also
+ * check_mem_region() etc. - fmhess */
+
+#include "../comedidev.h"
+
+#define PCI20000_ID 0x1d
+#define PCI20341_ID 0x77
+#define PCI20006_ID 0xe3
+#define PCI20xxx_EMPTY_ID 0xff
+
+#define PCI20000_OFFSET 0x100
+#define PCI20000_MODULES 3
+
+#define PCI20000_DIO_0 0x80
+#define PCI20000_DIO_1 0x81
+#define PCI20000_DIO_2 0xc0
+#define PCI20000_DIO_3 0xc1
+#define PCI20000_DIO_CONTROL_01 0x83 /* port 0, 1 control */
+#define PCI20000_DIO_CONTROL_23 0xc3 /* port 2, 3 control */
+#define PCI20000_DIO_BUFFER 0x82 /* buffer direction and enable */
+#define PCI20000_DIO_EOC 0xef /* even port, control output */
+#define PCI20000_DIO_OOC 0xfd /* odd port, control output */
+#define PCI20000_DIO_EIC 0x90 /* even port, control input */
+#define PCI20000_DIO_OIC 0x82 /* odd port, control input */
+#define DIO_CAND 0x12 /* and bit 1, bit 4 of control */
+#define DIO_BE 0x01 /* buffer: port enable */
+#define DIO_BO 0x04 /* buffer: output */
+#define DIO_BI 0x05 /* buffer: input */
+#define DIO_PS_0 0x00 /* buffer: port shift 0 */
+#define DIO_PS_1 0x01 /* buffer: port shift 1 */
+#define DIO_PS_2 0x04 /* buffer: port shift 2 */
+#define DIO_PS_3 0x05 /* buffer: port shift 3 */
+
+#define PCI20006_LCHAN0 0x0d
+#define PCI20006_STROBE0 0x0b
+#define PCI20006_LCHAN1 0x15
+#define PCI20006_STROBE1 0x13
+
+#define PCI20341_INIT 0x04
+#define PCI20341_REPMODE 0x00 /* single shot mode */
+#define PCI20341_PACER 0x00 /* Hardware Pacer disabled */
+#define PCI20341_CHAN_NR 0x04 /* number of input channels */
+#define PCI20341_CONFIG_REG 0x10
+#define PCI20341_MOD_STATUS 0x01
+#define PCI20341_OPT_REG 0x11
+#define PCI20341_SET_TIME_REG 0x15
+#define PCI20341_LCHAN_ADDR_REG 0x13
+#define PCI20341_CHAN_LIST 0x80
+#define PCI20341_CC_RESET 0x1b
+#define PCI20341_CHAN_RESET 0x19
+#define PCI20341_SOFT_PACER 0x04
+#define PCI20341_STATUS_REG 0x12
+#define PCI20341_LDATA 0x02
+#define PCI20341_DAISY_CHAIN 0x20 /* On-board inputs only */
+#define PCI20341_MUX 0x04 /* Enable on-board MUX */
+#define PCI20341_SCANLIST 0x80 /* Channel/Gain Scan List */
+
+union pci20xxx_subdev_private {
+ void *iobase;
+ struct {
+ void *iobase;
+ const struct comedi_lrange *ao_range_list[2]; /* range of channels of ao module */
+ unsigned int last_data[2];
+ } pci20006;
+ struct {
+ void *iobase;
+ int timebase;
+ int settling_time;
+ int ai_gain;
+ } pci20341;
+};
+
+struct pci20xxx_private {
+
+ void *ioaddr;
+ union pci20xxx_subdev_private subdev_private[PCI20000_MODULES];
+};
+
+
+#define devpriv ((struct pci20xxx_private *)dev->private)
+#define CHAN (CR_CHAN(it->chanlist[0]))
+
+static int pci20xxx_attach(struct comedi_device * dev, struct comedi_devconfig * it);
+static int pci20xxx_detach(struct comedi_device * dev);
+
+static struct comedi_driver driver_pci20xxx = {
+ driver_name:"ii_pci20kc",
+ module:THIS_MODULE,
+ attach:pci20xxx_attach,
+ detach:pci20xxx_detach,
+};
+
+static int pci20006_init(struct comedi_device * dev, struct comedi_subdevice * s,
+ int opt0, int opt1);
+static int pci20341_init(struct comedi_device * dev, struct comedi_subdevice * s,
+ int opt0, int opt1);
+static int pci20xxx_dio_init(struct comedi_device * dev, struct comedi_subdevice * s);
+
+/*
+ options[0] Board base address
+ options[1] IRQ
+ options[2] first option for module 1
+ options[3] second option for module 1
+ options[4] first option for module 2
+ options[5] second option for module 2
+ options[6] first option for module 3
+ options[7] second option for module 3
+
+ options for PCI-20341M:
+ first Analog input gain configuration
+ 0 == 1
+ 1 == 10
+ 2 == 100
+ 3 == 200
+
+ options for PCI-20006M:
+ first Analog output channel 0 range configuration
+ 0 == bipolar 10 (-10V -- +10V)
+ 1 == unipolar 10V (0V -- +10V)
+ 2 == bipolar 5V (-5V -- +5V)
+ second Analog output channel 1 range configuration
+ 0 == bipolar 10 (-10V -- +10V)
+ 1 == unipolar 10V (0V -- +10V)
+ 2 == bipolar 5V (-5V -- +5V)
+*/
+static int pci20xxx_attach(struct comedi_device * dev, struct comedi_devconfig * it)
+{
+ unsigned char i;
+ int ret;
+ int id;
+ struct comedi_subdevice *s;
+ union pci20xxx_subdev_private *sdp;
+
+ if ((ret = alloc_subdevices(dev, 1 + PCI20000_MODULES)) < 0)
+ return ret;
+ if ((ret = alloc_private(dev, sizeof(struct pci20xxx_private))) < 0)
+ return ret;
+
+ devpriv->ioaddr = (void *)(unsigned long)it->options[0];
+ dev->board_name = "pci20kc";
+
+ /* Check PCI-20001 C-2A Carrier Board ID */
+ if ((readb(devpriv->ioaddr) & PCI20000_ID) != PCI20000_ID) {
+ printk("comedi%d: ii_pci20kc", dev->minor);
+ printk(" PCI-20001 C-2A Carrier Board at base=0x%p not found !\n", devpriv->ioaddr);
+ return -EINVAL;
+ }
+ printk("comedi%d:\n", dev->minor);
+ printk("ii_pci20kc: PCI-20001 C-2A at base=0x%p\n", devpriv->ioaddr);
+
+ for (i = 0; i < PCI20000_MODULES; i++) {
+ s = dev->subdevices + i;
+ id = readb(devpriv->ioaddr + (i + 1) * PCI20000_OFFSET);
+ s->private = devpriv->subdev_private + i;
+ sdp = s->private;
+ switch (id) {
+ case PCI20006_ID:
+ sdp->pci20006.iobase =
+ devpriv->ioaddr + (i + 1) * PCI20000_OFFSET;
+ pci20006_init(dev, s, it->options[2 * i + 2],
+ it->options[2 * i + 3]);
+ printk("comedi%d: ii_pci20kc", dev->minor);
+ printk(" PCI-20006 module in slot %d \n", i + 1);
+ break;
+ case PCI20341_ID:
+ sdp->pci20341.iobase =
+ devpriv->ioaddr + (i + 1) * PCI20000_OFFSET;
+ pci20341_init(dev, s, it->options[2 * i + 2],
+ it->options[2 * i + 3]);
+ printk("comedi%d: ii_pci20kc", dev->minor);
+ printk(" PCI-20341 module in slot %d \n", i + 1);
+ break;
+ default:
+ printk("ii_pci20kc: unknown module code 0x%02x in slot %d: module disabled\n", id, i);
+ /* fall through */
+ case PCI20xxx_EMPTY_ID:
+ s->type = COMEDI_SUBD_UNUSED;
+ break;
+ }
+ }
+
+ /* initialize struct pci20xxx_private */
+ pci20xxx_dio_init(dev, dev->subdevices + PCI20000_MODULES);
+
+ return 1;
+}
+
+static int pci20xxx_detach(struct comedi_device * dev)
+{
+ printk("comedi%d: pci20xxx: remove\n", dev->minor);
+
+ return 0;
+}
+
+/* pci20006m */
+
+static int pci20006_insn_read(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data);
+static int pci20006_insn_write(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data);
+
+static const struct comedi_lrange *pci20006_range_list[] = {
+ &range_bipolar10,
+ &range_unipolar10,
+ &range_bipolar5,
+};
+
+static int pci20006_init(struct comedi_device * dev, struct comedi_subdevice * s,
+ int opt0, int opt1)
+{
+ union pci20xxx_subdev_private *sdp = s->private;
+
+ if (opt0 < 0 || opt0 > 2)
+ opt0 = 0;
+ if (opt1 < 0 || opt1 > 2)
+ opt1 = 0;
+
+ sdp->pci20006.ao_range_list[0] = pci20006_range_list[opt0];
+ sdp->pci20006.ao_range_list[1] = pci20006_range_list[opt1];
+
+ /* ao subdevice */
+ s->type = COMEDI_SUBD_AO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = 2;
+ s->len_chanlist = 2;
+ s->insn_read = pci20006_insn_read;
+ s->insn_write = pci20006_insn_write;
+ s->maxdata = 0xffff;
+ s->range_table_list = sdp->pci20006.ao_range_list;
+ return 0;
+}
+
+static int pci20006_insn_read(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data)
+{
+ union pci20xxx_subdev_private *sdp = s->private;
+
+ data[0] = sdp->pci20006.last_data[CR_CHAN(insn->chanspec)];
+
+ return 1;
+}
+
+static int pci20006_insn_write(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data)
+{
+ union pci20xxx_subdev_private *sdp = s->private;
+ int hi, lo;
+ unsigned int boarddata;
+
+ sdp->pci20006.last_data[CR_CHAN(insn->chanspec)] = data[0];
+ boarddata = (((unsigned int)data[0] + 0x8000) & 0xffff); /* comedi-data -> board-data */
+ lo = (boarddata & 0xff);
+ hi = ((boarddata >> 8) & 0xff);
+
+ switch (CR_CHAN(insn->chanspec)) {
+ case 0:
+ writeb(lo, sdp->iobase + PCI20006_LCHAN0);
+ writeb(hi, sdp->iobase + PCI20006_LCHAN0 + 1);
+ writeb(0x00, sdp->iobase + PCI20006_STROBE0);
+ break;
+ case 1:
+ writeb(lo, sdp->iobase + PCI20006_LCHAN1);
+ writeb(hi, sdp->iobase + PCI20006_LCHAN1 + 1);
+ writeb(0x00, sdp->iobase + PCI20006_STROBE1);
+ break;
+ default:
+ printk(" comedi%d: pci20xxx: ao channel Error!\n", dev->minor);
+ return -EINVAL;
+ }
+
+ return 1;
+}
+
+/* PCI20341M */
+
+static int pci20341_insn_read(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data);
+
+static const int pci20341_timebase[] = { 0x00, 0x00, 0x00, 0x04 };
+static const int pci20341_settling_time[] = { 0x58, 0x58, 0x93, 0x99 };
+
+static const struct comedi_lrange range_bipolar0_5 = { 1, {BIP_RANGE(0.5)} };
+static const struct comedi_lrange range_bipolar0_05 = { 1, {BIP_RANGE(0.05)} };
+static const struct comedi_lrange range_bipolar0_025 = { 1, {BIP_RANGE(0.025)} };
+
+static const struct comedi_lrange *const pci20341_ranges[] = {
+ &range_bipolar5,
+ &range_bipolar0_5,
+ &range_bipolar0_05,
+ &range_bipolar0_025,
+};
+
+static int pci20341_init(struct comedi_device * dev, struct comedi_subdevice * s,
+ int opt0, int opt1)
+{
+ union pci20xxx_subdev_private *sdp = s->private;
+ int option;
+
+ /* options handling */
+ if (opt0 < 0 || opt0 > 3)
+ opt0 = 0;
+ sdp->pci20341.timebase = pci20341_timebase[opt0];
+ sdp->pci20341.settling_time = pci20341_settling_time[opt0];
+
+ /* ai subdevice */
+ s->type = COMEDI_SUBD_AI;
+ s->subdev_flags = SDF_READABLE;
+ s->n_chan = PCI20341_CHAN_NR;
+ s->len_chanlist = PCI20341_SCANLIST;
+ s->insn_read = pci20341_insn_read;
+ s->maxdata = 0xffff;
+ s->range_table = pci20341_ranges[opt0];
+
+ option = sdp->pci20341.timebase | PCI20341_REPMODE; /* depends on gain, trigger, repetition mode */
+
+ writeb(PCI20341_INIT, sdp->iobase + PCI20341_CONFIG_REG); /* initialize Module */
+ writeb(PCI20341_PACER, sdp->iobase + PCI20341_MOD_STATUS); /* set Pacer */
+ writeb(option, sdp->iobase + PCI20341_OPT_REG); /* option register */
+ writeb(sdp->pci20341.settling_time, sdp->iobase + PCI20341_SET_TIME_REG); /* settling time counter */
+ /* trigger not implemented */
+ return 0;
+}
+
+static int pci20341_insn_read(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data)
+{
+ union pci20xxx_subdev_private *sdp = s->private;
+ unsigned int i = 0, j = 0;
+ int lo, hi;
+ unsigned char eoc; /* end of conversion */
+ unsigned int clb; /* channel list byte */
+ unsigned int boarddata;
+
+ writeb(1, sdp->iobase + PCI20341_LCHAN_ADDR_REG); /* write number of input channels */
+ clb = PCI20341_DAISY_CHAIN | PCI20341_MUX | (sdp->pci20341.ai_gain << 3)
+ | CR_CHAN(insn->chanspec);
+ writeb(clb, sdp->iobase + PCI20341_CHAN_LIST);
+ writeb(0x00, sdp->iobase + PCI20341_CC_RESET); /* reset settling time counter and trigger delay counter */
+ writeb(0x00, sdp->iobase + PCI20341_CHAN_RESET);
+
+ /* generate Pacer */
+
+ for (i = 0; i < insn->n; i++) {
+ /* data polling isn't the niciest way to get the data, I know,
+ * but there are only 6 cycles (mean) and it is easier than
+ * the whole interrupt stuff
+ */
+ j = 0;
+ readb(sdp->iobase + PCI20341_SOFT_PACER); /* generate Pacer */
+ eoc = readb(sdp->iobase + PCI20341_STATUS_REG);
+ while ((eoc < 0x80) && j < 100) { /* poll Interrupt Flag */
+ j++;
+ eoc = readb(sdp->iobase + PCI20341_STATUS_REG);
+ }
+ if (j >= 100) {
+ printk("comedi%d: pci20xxx: AI interrupt channel %i polling exit !\n", dev->minor, i);
+ return -EINVAL;
+ }
+ lo = readb(sdp->iobase + PCI20341_LDATA);
+ hi = readb(sdp->iobase + PCI20341_LDATA + 1);
+ boarddata = lo + 0x100 * hi;
+ data[i] = (short) ((boarddata + 0x8000) & 0xffff); /* board-data -> comedi-data */
+ }
+
+ return i;
+}
+
+/* native DIO */
+
+static void pci20xxx_dio_config(struct comedi_device * dev, struct comedi_subdevice * s);
+static int pci20xxx_dio_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data);
+static int pci20xxx_dio_insn_config(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data);
+
+/* initialize struct pci20xxx_private */
+static int pci20xxx_dio_init(struct comedi_device * dev, struct comedi_subdevice * s)
+{
+
+ s->type = COMEDI_SUBD_DIO;
+ s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
+ s->n_chan = 32;
+ s->insn_bits = pci20xxx_dio_insn_bits;
+ s->insn_config = pci20xxx_dio_insn_config;
+ s->maxdata = 1;
+ s->len_chanlist = 32;
+ s->range_table = &range_digital;
+ s->io_bits = 0;
+
+ /* digital I/O lines default to input on board reset. */
+ pci20xxx_dio_config(dev, s);
+
+ return 0;
+}
+
+static int pci20xxx_dio_insn_config(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data)
+{
+ int mask, bits;
+
+ mask = 1 << CR_CHAN(insn->chanspec);
+ if (mask & 0x000000ff) {
+ bits = 0x000000ff;
+ } else if (mask & 0x0000ff00) {
+ bits = 0x0000ff00;
+ } else if (mask & 0x00ff0000) {
+ bits = 0x00ff0000;
+ } else {
+ bits = 0xff000000;
+ }
+ if (data[0]) {
+ s->io_bits |= bits;
+ } else {
+ s->io_bits &= ~bits;
+ }
+ pci20xxx_dio_config(dev, s);
+
+ return 1;
+}
+
+static int pci20xxx_dio_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data)
+{
+ unsigned int mask = data[0];
+
+ s->state &= ~mask;
+ s->state |= (mask & data[1]);
+
+ mask &= s->io_bits;
+ if (mask & 0x000000ff)
+ writeb((s->state >> 0) & 0xff,
+ devpriv->ioaddr + PCI20000_DIO_0);
+ if (mask & 0x0000ff00)
+ writeb((s->state >> 8) & 0xff,
+ devpriv->ioaddr + PCI20000_DIO_1);
+ if (mask & 0x00ff0000)
+ writeb((s->state >> 16) & 0xff,
+ devpriv->ioaddr + PCI20000_DIO_2);
+ if (mask & 0xff000000)
+ writeb((s->state >> 24) & 0xff,
+ devpriv->ioaddr + PCI20000_DIO_3);
+
+ data[1] = readb(devpriv->ioaddr + PCI20000_DIO_0);
+ data[1] |= readb(devpriv->ioaddr + PCI20000_DIO_1) << 8;
+ data[1] |= readb(devpriv->ioaddr + PCI20000_DIO_2) << 16;
+ data[1] |= readb(devpriv->ioaddr + PCI20000_DIO_3) << 24;
+
+ return 2;
+}
+
+static void pci20xxx_dio_config(struct comedi_device * dev, struct comedi_subdevice * s)
+{
+ unsigned char control_01;
+ unsigned char control_23;
+ unsigned char buffer;
+
+ control_01 = readb(devpriv->ioaddr + PCI20000_DIO_CONTROL_01);
+ control_23 = readb(devpriv->ioaddr + PCI20000_DIO_CONTROL_23);
+ buffer = readb(devpriv->ioaddr + PCI20000_DIO_BUFFER);
+
+ if (s->io_bits & 0x000000ff) {
+ /* output port 0 */
+ control_01 &= PCI20000_DIO_EOC;
+ buffer = (buffer & (~(DIO_BE << DIO_PS_0))) | (DIO_BO <<
+ DIO_PS_0);
+ } else {
+ /* input port 0 */
+ control_01 = (control_01 & DIO_CAND) | PCI20000_DIO_EIC;
+ buffer = (buffer & (~(DIO_BI << DIO_PS_0)));
+ }
+ if (s->io_bits & 0x0000ff00) {
+ /* output port 1 */
+ control_01 &= PCI20000_DIO_OOC;
+ buffer = (buffer & (~(DIO_BE << DIO_PS_1))) | (DIO_BO <<
+ DIO_PS_1);
+ } else {
+ /* input port 1 */
+ control_01 = (control_01 & DIO_CAND) | PCI20000_DIO_OIC;
+ buffer = (buffer & (~(DIO_BI << DIO_PS_1)));
+ }
+ if (s->io_bits & 0x00ff0000) {
+ /* output port 2 */
+ control_23 &= PCI20000_DIO_EOC;
+ buffer = (buffer & (~(DIO_BE << DIO_PS_2))) | (DIO_BO <<
+ DIO_PS_2);
+ } else {
+ /* input port 2 */
+ control_23 = (control_23 & DIO_CAND) | PCI20000_DIO_EIC;
+ buffer = (buffer & (~(DIO_BI << DIO_PS_2)));
+ }
+ if (s->io_bits & 0xff000000) {
+ /* output port 3 */
+ control_23 &= PCI20000_DIO_OOC;
+ buffer = (buffer & (~(DIO_BE << DIO_PS_3))) | (DIO_BO <<
+ DIO_PS_3);
+ } else {
+ /* input port 3 */
+ control_23 = (control_23 & DIO_CAND) | PCI20000_DIO_OIC;
+ buffer = (buffer & (~(DIO_BI << DIO_PS_3)));
+ }
+ writeb(control_01, devpriv->ioaddr + PCI20000_DIO_CONTROL_01);
+ writeb(control_23, devpriv->ioaddr + PCI20000_DIO_CONTROL_23);
+ writeb(buffer, devpriv->ioaddr + PCI20000_DIO_BUFFER);
+}
+
+#if 0
+static void pci20xxx_do(struct comedi_device * dev, struct comedi_subdevice * s)
+{
+ /* XXX if the channel is configured for input, does this
+ do bad things? */
+ /* XXX it would be a good idea to only update the registers
+ that _need_ to be updated. This requires changes to
+ comedi, however. */
+ writeb((s->state >> 0) & 0xff, devpriv->ioaddr + PCI20000_DIO_0);
+ writeb((s->state >> 8) & 0xff, devpriv->ioaddr + PCI20000_DIO_1);
+ writeb((s->state >> 16) & 0xff, devpriv->ioaddr + PCI20000_DIO_2);
+ writeb((s->state >> 24) & 0xff, devpriv->ioaddr + PCI20000_DIO_3);
+}
+
+static unsigned int pci20xxx_di(struct comedi_device * dev, struct comedi_subdevice * s)
+{
+ /* XXX same note as above */
+ unsigned int bits;
+
+ bits = readb(devpriv->ioaddr + PCI20000_DIO_0);
+ bits |= readb(devpriv->ioaddr + PCI20000_DIO_1) << 8;
+ bits |= readb(devpriv->ioaddr + PCI20000_DIO_2) << 16;
+ bits |= readb(devpriv->ioaddr + PCI20000_DIO_3) << 24;
+
+ return bits;
+}
+#endif
+
+COMEDI_INITCLEANUP(driver_pci20xxx);
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