--- /dev/null
+/*
+ comedi/drivers/pcm724.c
+
+ Drew Csillag <drew_csillag@yahoo.com>
+
+ hardware driver for Advantech card:
+ card: PCM-3724
+ driver: pcm3724
+
+ Options for PCM-3724
+ [0] - IO Base
+*/
+/*
+Driver: pcm3724
+Description: Advantech PCM-3724
+Author: Drew Csillag <drew_csillag@yahoo.com>
+Devices: [Advantech] PCM-3724 (pcm724)
+Status: tested
+
+This is driver for digital I/O boards PCM-3724 with 48 DIO.
+It needs 8255.o for operations and only immediate mode is supported.
+See the source for configuration details.
+
+Copy/pasted/hacked from pcm724.c
+*/
+/*
+ * check_driver overrides:
+ * struct comedi_insn
+ */
+
+#include "../comedidev.h"
+
+#include <linux/ioport.h>
+#include <linux/delay.h>
+
+#include "8255.h"
+
+#define PCM3724_SIZE 16
+#define SIZE_8255 4
+
+#define BUF_C0 0x1
+#define BUF_B0 0x2
+#define BUF_A0 0x4
+#define BUF_C1 0x8
+#define BUF_B1 0x10
+#define BUF_A1 0x20
+
+#define GATE_A0 0x4
+#define GATE_B0 0x2
+#define GATE_C0 0x1
+#define GATE_A1 0x20
+#define GATE_B1 0x10
+#define GATE_C1 0x8
+
+/* from 8255.c */
+#define CR_CW 0x80
+#define _8255_CR 3
+#define CR_B_IO 0x02
+#define CR_B_MODE 0x04
+#define CR_C_IO 0x09
+#define CR_A_IO 0x10
+#define CR_A_MODE(a) ((a)<<5)
+#define CR_CW 0x80
+
+static int pcm3724_attach(struct comedi_device * dev, struct comedi_devconfig * it);
+static int pcm3724_detach(struct comedi_device * dev);
+
+struct pcm3724_board {
+ const char *name; // driver name
+ int dio; // num of DIO
+ int numofports; // num of 8255 subdevices
+ unsigned int IRQbits; // allowed interrupts
+ unsigned int io_range; // len of IO space
+};
+
+//used to track configured dios
+struct priv_pcm3724 {
+ int dio_1;
+ int dio_2;
+};
+
+static const struct pcm3724_board boardtypes[] = {
+ {"pcm3724", 48, 2, 0x00fc, PCM3724_SIZE,},
+};
+
+#define n_boardtypes (sizeof(boardtypes)/sizeof(struct pcm3724_board))
+#define this_board ((const struct pcm3724_board *)dev->board_ptr)
+
+static struct comedi_driver driver_pcm3724 = {
+ driver_name:"pcm3724",
+ module:THIS_MODULE,
+ attach:pcm3724_attach,
+ detach:pcm3724_detach,
+ board_name:&boardtypes[0].name,
+ num_names:n_boardtypes,
+ offset:sizeof(struct pcm3724_board),
+};
+
+COMEDI_INITCLEANUP(driver_pcm3724);
+
+// (setq c-basic-offset 8)
+
+static int subdev_8255_cb(int dir, int port, int data, unsigned long arg)
+{
+ unsigned long iobase = arg;
+ unsigned char inbres;
+ //printk("8255cb %d %d %d %lx\n", dir,port,data,arg);
+ if (dir) {
+ //printk("8255 cb outb(%x, %lx)\n", data, iobase+port);
+ outb(data, iobase + port);
+ return 0;
+ } else {
+ inbres = inb(iobase + port);
+ //printk("8255 cb inb(%lx) = %x\n", iobase+port, inbres);
+ return inbres;
+ }
+}
+
+static int compute_buffer(int config, int devno, struct comedi_subdevice * s)
+{
+ /* 1 in io_bits indicates output */
+ if (s->io_bits & 0x0000ff) {
+ if (devno == 0) {
+ config |= BUF_A0;
+ } else {
+ config |= BUF_A1;
+ }
+ }
+ if (s->io_bits & 0x00ff00) {
+ if (devno == 0) {
+ config |= BUF_B0;
+ } else {
+ config |= BUF_B1;
+ }
+ }
+ if (s->io_bits & 0xff0000) {
+ if (devno == 0) {
+ config |= BUF_C0;
+ } else {
+ config |= BUF_C1;
+ }
+ }
+ return config;
+}
+
+static void do_3724_config(struct comedi_device * dev, struct comedi_subdevice * s,
+ int chanspec)
+{
+ int config;
+ int buffer_config;
+ unsigned long port_8255_cfg;
+
+ config = CR_CW;
+ buffer_config = 0;
+
+ /* 1 in io_bits indicates output, 1 in config indicates input */
+ if (!(s->io_bits & 0x0000ff)) {
+ config |= CR_A_IO;
+ }
+ if (!(s->io_bits & 0x00ff00)) {
+ config |= CR_B_IO;
+ }
+ if (!(s->io_bits & 0xff0000)) {
+ config |= CR_C_IO;
+ }
+
+ buffer_config = compute_buffer(0, 0, dev->subdevices);
+ buffer_config = compute_buffer(buffer_config, 1, (dev->subdevices) + 1);
+
+ if (s == dev->subdevices) {
+ port_8255_cfg = dev->iobase + _8255_CR;
+ } else {
+ port_8255_cfg = dev->iobase + SIZE_8255 + _8255_CR;
+ }
+ outb(buffer_config, dev->iobase + 8); /* update buffer register */
+ //printk("pcm3724 buffer_config (%lx) %d, %x\n", dev->iobase + _8255_CR, chanspec, buffer_config);
+ outb(config, port_8255_cfg);
+}
+
+static void enable_chan(struct comedi_device * dev, struct comedi_subdevice * s, int chanspec)
+{
+ unsigned int mask;
+ int gatecfg;
+ struct priv_pcm3724 *priv;
+
+ gatecfg = 0;
+ priv = (struct priv_pcm3724 *) (dev->private);
+
+ mask = 1 << CR_CHAN(chanspec);
+ if (s == dev->subdevices) { // subdev 0
+ priv->dio_1 |= mask;
+ } else { //subdev 1
+ priv->dio_2 |= mask;
+ }
+ if (priv->dio_1 & 0xff0000) {
+ gatecfg |= GATE_C0;
+ }
+ if (priv->dio_1 & 0xff00) {
+ gatecfg |= GATE_B0;
+ }
+ if (priv->dio_1 & 0xff) {
+ gatecfg |= GATE_A0;
+ }
+ if (priv->dio_2 & 0xff0000) {
+ gatecfg |= GATE_C1;
+ }
+ if (priv->dio_2 & 0xff00) {
+ gatecfg |= GATE_B1;
+ }
+ if (priv->dio_2 & 0xff) {
+ gatecfg |= GATE_A1;
+ }
+ // printk("gate control %x\n", gatecfg);
+ outb(gatecfg, dev->iobase + 9);
+}
+
+/* overriding the 8255 insn config */
+static int subdev_3724_insn_config(struct comedi_device * dev, struct comedi_subdevice * s,
+ struct comedi_insn * insn, unsigned int * data)
+{
+ unsigned int mask;
+ unsigned int bits;
+
+ mask = 1 << CR_CHAN(insn->chanspec);
+ if (mask & 0x0000ff) {
+ bits = 0x0000ff;
+ } else if (mask & 0x00ff00) {
+ bits = 0x00ff00;
+ } else if (mask & 0x0f0000) {
+ bits = 0x0f0000;
+ } else {
+ bits = 0xf00000;
+ }
+
+ switch (data[0]) {
+ case INSN_CONFIG_DIO_INPUT:
+ s->io_bits &= ~bits;
+ break;
+ case INSN_CONFIG_DIO_OUTPUT:
+ s->io_bits |= bits;
+ break;
+ case INSN_CONFIG_DIO_QUERY:
+ data[1] = (s->io_bits & bits) ? COMEDI_OUTPUT : COMEDI_INPUT;
+ return insn->n;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ do_3724_config(dev, s, insn->chanspec);
+ enable_chan(dev, s, insn->chanspec);
+ return 1;
+}
+
+static int pcm3724_attach(struct comedi_device * dev, struct comedi_devconfig * it)
+{
+ unsigned long iobase;
+ unsigned int iorange;
+ int ret, i, n_subdevices;
+
+ iobase = it->options[0];
+ iorange = this_board->io_range;
+ if ((ret = alloc_private(dev, sizeof(struct priv_pcm3724))) < 0)
+ return -ENOMEM;
+
+ ((struct priv_pcm3724 *) (dev->private))->dio_1 = 0;
+ ((struct priv_pcm3724 *) (dev->private))->dio_2 = 0;
+
+ printk("comedi%d: pcm3724: board=%s, 0x%03lx ", dev->minor,
+ this_board->name, iobase);
+ if (!iobase || !request_region(iobase, iorange, "pcm3724")) {
+ printk("I/O port conflict\n");
+ return -EIO;
+ }
+
+ dev->iobase = iobase;
+ dev->board_name = this_board->name;
+ printk("\n");
+
+ n_subdevices = this_board->numofports;
+
+ if ((ret = alloc_subdevices(dev, n_subdevices)) < 0)
+ return ret;
+
+ for (i = 0; i < dev->n_subdevices; i++) {
+ subdev_8255_init(dev, dev->subdevices + i, subdev_8255_cb,
+ (unsigned long)(dev->iobase + SIZE_8255 * i));
+ ((dev->subdevices) + i)->insn_config = subdev_3724_insn_config;
+ };
+ return 0;
+}
+
+static int pcm3724_detach(struct comedi_device * dev)
+{
+ int i;
+
+ if (dev->subdevices) {
+ for (i = 0; i < dev->n_subdevices; i++) {
+ subdev_8255_cleanup(dev, dev->subdevices + i);
+ }
+ }
+ if (dev->iobase) {
+ release_region(dev->iobase, this_board->io_range);
+ }
+
+ return 0;
+}
projects / linux-2.6-omap-h63xx.git / blobdiff