--- /dev/null
+/*
+ module/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.o
+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:
+ * comedi_insn
+ */
+
+#include <linux/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(comedi_device *dev,comedi_devconfig *it);
+static int pcm3724_detach(comedi_device *dev);
+
+typedef struct {
+ char *name; // driver name
+ int dio; // num of DIO
+ int numofports; // num of 8255 subdevices
+ unsigned int IRQbits; // allowed interrupts
+ int io_range; // len of IO space
+} boardtype;
+
+//used to track configured dios
+typedef struct {
+ int dio_1;
+ int dio_2;
+} priv_pcm3724;
+static boardtype boardtypes[] =
+{
+ {"pcm3724", 48, 2, 0x00fc, PCM3724_SIZE,},
+};
+
+#define n_boardtypes (sizeof(boardtypes)/sizeof(boardtype))
+#define this_board ((boardtype *)dev->board_ptr)
+
+static comedi_driver driver_pcm3724={
+ driver_name: "pcm3724",
+ module: THIS_MODULE,
+ attach: pcm3724_attach,
+ detach: pcm3724_detach,
+ board_name: boardtypes,
+ num_names: n_boardtypes,
+ offset: sizeof(boardtype),
+};
+COMEDI_INITCLEANUP(driver_pcm3724);
+
+// (setq c-basic-offset 8)
+
+static int subdev_8255_cb(int dir,int port,int data,unsigned long arg)
+{
+ int iobase=arg;
+ unsigned char inbres;
+ //printk("8255cb %d %d %d %x\n", dir,port,data,arg);
+ if(dir){
+ //printk("8255 cb outb(%x, %x)\n", data, iobase+port);
+ outb(data,iobase+port);
+ return 0;
+ }else{
+ inbres = inb(iobase+port);
+ //printk("8255 cb inb(%x) = %x\n", iobase+port, inbres);
+ return inbres;
+ }
+}
+
+static int compute_buffer(int config, int devno, 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(comedi_device *dev,comedi_subdevice *s,
+ int chanspec)
+{
+ int config;
+ int buffer_config;
+ int 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 (%x) %d, %x\n", dev->iobase + _8255_CR, chanspec, buffer_config);
+ outb(config, port_8255_cfg);
+}
+
+static void enable_chan(comedi_device *dev, comedi_subdevice *s,
+ int chanspec)
+{
+ unsigned int mask;
+ int gatecfg;
+ priv_pcm3724 *priv;
+
+ gatecfg = 0;
+ priv = (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(comedi_device *dev, comedi_subdevice *s,
+ comedi_insn *insn, lsampl_t *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(comedi_device *dev,comedi_devconfig *it)
+{
+ int iobase,iorange;
+ int ret,i,n_subdevices;
+
+ iobase=it->options[0];
+ iorange=this_board->io_range;
+ if((ret=alloc_private(dev,sizeof(priv_pcm3724)))<0)
+ return -ENOMEM;
+
+ ((priv_pcm3724*)(dev->private))->dio_1 = 0;
+ ((priv_pcm3724*)(dev->private))->dio_2 = 0;
+
+ printk("comedi%d: pcm3724: board=%s, 0x%03x ",dev->minor,
+ this_board->name,iobase);
+ if(check_region(iobase,iorange)<0){
+ printk("I/O port conflict\n");
+ return -EIO;
+ }
+
+ request_region(iobase, iorange, "pcm3724");
+ 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(comedi_device *dev)
+{
+ int i;
+
+ for(i=0;i<dev->n_subdevices;i++){
+ subdev_8255_cleanup(dev,dev->subdevices+i);
+ }
+ release_region(dev->iobase,this_board->io_range);
+
+ return 0;
+}
+
+
projects / comedi.git / commitdiff