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Staging: comedi: add pcm3724 driver
Driver Advantech PCM-3724 card From: Drew Csillag <drew_csillag@yahoo.com> Cc: David Schleef <ds@schleef.org> Cc: Ian Abbott <abbotti@mev.co.uk> Cc: Frank Mori Hess <fmhess@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Drew Csillag
Greg Kroah-Hartman
parent
7f62d87d68
commit
e30ec01134
1 changed files with 306 additions and 0 deletions
306
drivers/staging/comedi/drivers/pcm3724.c
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306
drivers/staging/comedi/drivers/pcm3724.c
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/*
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comedi/drivers/pcm724.c
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Drew Csillag <drew_csillag@yahoo.com>
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hardware driver for Advantech card:
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card: PCM-3724
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driver: pcm3724
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Options for PCM-3724
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[0] - IO Base
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*/
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/*
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Driver: pcm3724
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Description: Advantech PCM-3724
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Author: Drew Csillag <drew_csillag@yahoo.com>
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Devices: [Advantech] PCM-3724 (pcm724)
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Status: tested
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This is driver for digital I/O boards PCM-3724 with 48 DIO.
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It needs 8255.o for operations and only immediate mode is supported.
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See the source for configuration details.
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Copy/pasted/hacked from pcm724.c
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*/
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/*
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* check_driver overrides:
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* comedi_insn
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*/
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#include "../comedidev.h"
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#include <linux/ioport.h>
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#include <linux/delay.h>
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#include "8255.h"
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#define PCM3724_SIZE 16
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#define SIZE_8255 4
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#define BUF_C0 0x1
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#define BUF_B0 0x2
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#define BUF_A0 0x4
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#define BUF_C1 0x8
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#define BUF_B1 0x10
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#define BUF_A1 0x20
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#define GATE_A0 0x4
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#define GATE_B0 0x2
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#define GATE_C0 0x1
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#define GATE_A1 0x20
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#define GATE_B1 0x10
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#define GATE_C1 0x8
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/* from 8255.c */
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#define CR_CW 0x80
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#define _8255_CR 3
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#define CR_B_IO 0x02
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#define CR_B_MODE 0x04
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#define CR_C_IO 0x09
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#define CR_A_IO 0x10
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#define CR_A_MODE(a) ((a)<<5)
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#define CR_CW 0x80
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static int pcm3724_attach(comedi_device * dev, comedi_devconfig * it);
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static int pcm3724_detach(comedi_device * dev);
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typedef struct {
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const char *name; // driver name
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int dio; // num of DIO
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int numofports; // num of 8255 subdevices
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unsigned int IRQbits; // allowed interrupts
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unsigned int io_range; // len of IO space
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} boardtype;
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//used to track configured dios
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typedef struct {
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int dio_1;
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int dio_2;
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} priv_pcm3724;
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static const boardtype boardtypes[] = {
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{"pcm3724", 48, 2, 0x00fc, PCM3724_SIZE,},
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};
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#define n_boardtypes (sizeof(boardtypes)/sizeof(boardtype))
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#define this_board ((const boardtype *)dev->board_ptr)
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static comedi_driver driver_pcm3724 = {
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driver_name:"pcm3724",
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module:THIS_MODULE,
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attach:pcm3724_attach,
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detach:pcm3724_detach,
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board_name:&boardtypes[0].name,
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num_names:n_boardtypes,
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offset:sizeof(boardtype),
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};
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COMEDI_INITCLEANUP(driver_pcm3724);
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// (setq c-basic-offset 8)
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static int subdev_8255_cb(int dir, int port, int data, unsigned long arg)
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{
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unsigned long iobase = arg;
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unsigned char inbres;
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//printk("8255cb %d %d %d %lx\n", dir,port,data,arg);
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if (dir) {
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//printk("8255 cb outb(%x, %lx)\n", data, iobase+port);
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outb(data, iobase + port);
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return 0;
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} else {
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inbres = inb(iobase + port);
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//printk("8255 cb inb(%lx) = %x\n", iobase+port, inbres);
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return inbres;
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}
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}
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static int compute_buffer(int config, int devno, comedi_subdevice * s)
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{
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/* 1 in io_bits indicates output */
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if (s->io_bits & 0x0000ff) {
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if (devno == 0) {
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config |= BUF_A0;
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} else {
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config |= BUF_A1;
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}
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}
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if (s->io_bits & 0x00ff00) {
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if (devno == 0) {
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config |= BUF_B0;
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} else {
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config |= BUF_B1;
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}
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}
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if (s->io_bits & 0xff0000) {
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if (devno == 0) {
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config |= BUF_C0;
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} else {
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config |= BUF_C1;
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}
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}
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return config;
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}
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static void do_3724_config(comedi_device * dev, comedi_subdevice * s,
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int chanspec)
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{
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int config;
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int buffer_config;
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unsigned long port_8255_cfg;
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config = CR_CW;
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buffer_config = 0;
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/* 1 in io_bits indicates output, 1 in config indicates input */
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if (!(s->io_bits & 0x0000ff)) {
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config |= CR_A_IO;
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}
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if (!(s->io_bits & 0x00ff00)) {
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config |= CR_B_IO;
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}
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if (!(s->io_bits & 0xff0000)) {
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config |= CR_C_IO;
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}
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buffer_config = compute_buffer(0, 0, dev->subdevices);
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buffer_config = compute_buffer(buffer_config, 1, (dev->subdevices) + 1);
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if (s == dev->subdevices) {
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port_8255_cfg = dev->iobase + _8255_CR;
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} else {
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port_8255_cfg = dev->iobase + SIZE_8255 + _8255_CR;
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}
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outb(buffer_config, dev->iobase + 8); /* update buffer register */
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//printk("pcm3724 buffer_config (%lx) %d, %x\n", dev->iobase + _8255_CR, chanspec, buffer_config);
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outb(config, port_8255_cfg);
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}
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static void enable_chan(comedi_device * dev, comedi_subdevice * s, int chanspec)
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{
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unsigned int mask;
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int gatecfg;
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priv_pcm3724 *priv;
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gatecfg = 0;
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priv = (priv_pcm3724 *) (dev->private);
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mask = 1 << CR_CHAN(chanspec);
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if (s == dev->subdevices) { // subdev 0
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priv->dio_1 |= mask;
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} else { //subdev 1
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priv->dio_2 |= mask;
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}
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if (priv->dio_1 & 0xff0000) {
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gatecfg |= GATE_C0;
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}
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if (priv->dio_1 & 0xff00) {
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gatecfg |= GATE_B0;
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}
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if (priv->dio_1 & 0xff) {
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gatecfg |= GATE_A0;
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}
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if (priv->dio_2 & 0xff0000) {
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gatecfg |= GATE_C1;
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}
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if (priv->dio_2 & 0xff00) {
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gatecfg |= GATE_B1;
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}
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if (priv->dio_2 & 0xff) {
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gatecfg |= GATE_A1;
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}
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// printk("gate control %x\n", gatecfg);
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outb(gatecfg, dev->iobase + 9);
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}
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/* overriding the 8255 insn config */
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static int subdev_3724_insn_config(comedi_device * dev, comedi_subdevice * s,
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comedi_insn * insn, lsampl_t * data)
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{
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unsigned int mask;
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unsigned int bits;
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mask = 1 << CR_CHAN(insn->chanspec);
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if (mask & 0x0000ff) {
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bits = 0x0000ff;
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} else if (mask & 0x00ff00) {
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bits = 0x00ff00;
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} else if (mask & 0x0f0000) {
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bits = 0x0f0000;
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} else {
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bits = 0xf00000;
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}
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switch (data[0]) {
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case INSN_CONFIG_DIO_INPUT:
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s->io_bits &= ~bits;
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break;
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case INSN_CONFIG_DIO_OUTPUT:
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s->io_bits |= bits;
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break;
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case INSN_CONFIG_DIO_QUERY:
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data[1] = (s->io_bits & bits) ? COMEDI_OUTPUT : COMEDI_INPUT;
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return insn->n;
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break;
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default:
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return -EINVAL;
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}
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do_3724_config(dev, s, insn->chanspec);
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enable_chan(dev, s, insn->chanspec);
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return 1;
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}
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static int pcm3724_attach(comedi_device * dev, comedi_devconfig * it)
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{
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unsigned long iobase;
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unsigned int iorange;
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int ret, i, n_subdevices;
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iobase = it->options[0];
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iorange = this_board->io_range;
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if ((ret = alloc_private(dev, sizeof(priv_pcm3724))) < 0)
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return -ENOMEM;
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((priv_pcm3724 *) (dev->private))->dio_1 = 0;
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((priv_pcm3724 *) (dev->private))->dio_2 = 0;
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printk("comedi%d: pcm3724: board=%s, 0x%03lx ", dev->minor,
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this_board->name, iobase);
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if (!iobase || !request_region(iobase, iorange, "pcm3724")) {
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printk("I/O port conflict\n");
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return -EIO;
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}
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dev->iobase = iobase;
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dev->board_name = this_board->name;
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printk("\n");
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n_subdevices = this_board->numofports;
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if ((ret = alloc_subdevices(dev, n_subdevices)) < 0)
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return ret;
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for (i = 0; i < dev->n_subdevices; i++) {
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subdev_8255_init(dev, dev->subdevices + i, subdev_8255_cb,
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(unsigned long)(dev->iobase + SIZE_8255 * i));
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((dev->subdevices) + i)->insn_config = subdev_3724_insn_config;
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};
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return 0;
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}
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static int pcm3724_detach(comedi_device * dev)
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{
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int i;
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if (dev->subdevices) {
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for (i = 0; i < dev->n_subdevices; i++) {
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subdev_8255_cleanup(dev, dev->subdevices + i);
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}
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}
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if (dev->iobase) {
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release_region(dev->iobase, this_board->io_range);
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}
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return 0;
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}
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