2 comedi/drivers/pcm724.c
4 Drew Csillag <drew_csillag@yahoo.com>
6 hardware driver for Advantech card:
15 Description: Advantech PCM-3724
16 Author: Drew Csillag <drew_csillag@yahoo.com>
17 Devices: [Advantech] PCM-3724 (pcm724)
20 This is driver for digital I/O boards PCM-3724 with 48 DIO.
21 It needs 8255.o for operations and only immediate mode is supported.
22 See the source for configuration details.
24 Copy/pasted/hacked from pcm724.c
27 * check_driver overrides:
31 #include "../comedidev.h"
33 #include <linux/ioport.h>
34 #include <linux/delay.h>
38 #define PCM3724_SIZE 16
59 #define CR_B_MODE 0x04
62 #define CR_A_MODE(a) ((a)<<5)
65 static int pcm3724_attach(struct comedi_device *dev, struct comedi_devconfig *it);
66 static int pcm3724_detach(struct comedi_device *dev);
68 struct pcm3724_board {
69 const char *name; /* driver name */
70 int dio; /* num of DIO */
71 int numofports; /* num of 8255 subdevices */
72 unsigned int IRQbits; /* allowed interrupts */
73 unsigned int io_range; /* len of IO space */
76 /* used to track configured dios */
82 static const struct pcm3724_board boardtypes[] = {
83 {"pcm3724", 48, 2, 0x00fc, PCM3724_SIZE,},
86 #define n_boardtypes (sizeof(boardtypes)/sizeof(struct pcm3724_board))
87 #define this_board ((const struct pcm3724_board *)dev->board_ptr)
89 static struct comedi_driver driver_pcm3724 = {
90 driver_name:"pcm3724",
92 attach:pcm3724_attach,
93 detach:pcm3724_detach,
94 board_name:&boardtypes[0].name,
95 num_names:n_boardtypes,
96 offset:sizeof(struct pcm3724_board),
99 COMEDI_INITCLEANUP(driver_pcm3724);
101 /* (setq c-basic-offset 8) */
103 static int subdev_8255_cb(int dir, int port, int data, unsigned long arg)
105 unsigned long iobase = arg;
106 unsigned char inbres;
107 /* printk("8255cb %d %d %d %lx\n", dir,port,data,arg); */
109 /* printk("8255 cb outb(%x, %lx)\n", data, iobase+port); */
110 outb(data, iobase + port);
113 inbres = inb(iobase + port);
114 /* printk("8255 cb inb(%lx) = %x\n", iobase+port, inbres); */
119 static int compute_buffer(int config, int devno, struct comedi_subdevice *s)
121 /* 1 in io_bits indicates output */
122 if (s->io_bits & 0x0000ff) {
129 if (s->io_bits & 0x00ff00) {
136 if (s->io_bits & 0xff0000) {
146 static void do_3724_config(struct comedi_device *dev, struct comedi_subdevice *s,
151 unsigned long port_8255_cfg;
156 /* 1 in io_bits indicates output, 1 in config indicates input */
157 if (!(s->io_bits & 0x0000ff)) {
160 if (!(s->io_bits & 0x00ff00)) {
163 if (!(s->io_bits & 0xff0000)) {
167 buffer_config = compute_buffer(0, 0, dev->subdevices);
168 buffer_config = compute_buffer(buffer_config, 1, (dev->subdevices) + 1);
170 if (s == dev->subdevices) {
171 port_8255_cfg = dev->iobase + _8255_CR;
173 port_8255_cfg = dev->iobase + SIZE_8255 + _8255_CR;
175 outb(buffer_config, dev->iobase + 8); /* update buffer register */
176 /* printk("pcm3724 buffer_config (%lx) %d, %x\n", dev->iobase + _8255_CR, chanspec, buffer_config); */
177 outb(config, port_8255_cfg);
180 static void enable_chan(struct comedi_device *dev, struct comedi_subdevice *s, int chanspec)
184 struct priv_pcm3724 *priv;
187 priv = (struct priv_pcm3724 *) (dev->private);
189 mask = 1 << CR_CHAN(chanspec);
190 if (s == dev->subdevices) { /* subdev 0 */
192 } else { /* subdev 1 */
195 if (priv->dio_1 & 0xff0000) {
198 if (priv->dio_1 & 0xff00) {
201 if (priv->dio_1 & 0xff) {
204 if (priv->dio_2 & 0xff0000) {
207 if (priv->dio_2 & 0xff00) {
210 if (priv->dio_2 & 0xff) {
213 /* printk("gate control %x\n", gatecfg); */
214 outb(gatecfg, dev->iobase + 9);
217 /* overriding the 8255 insn config */
218 static int subdev_3724_insn_config(struct comedi_device *dev, struct comedi_subdevice *s,
219 struct comedi_insn *insn, unsigned int *data)
224 mask = 1 << CR_CHAN(insn->chanspec);
225 if (mask & 0x0000ff) {
227 } else if (mask & 0x00ff00) {
229 } else if (mask & 0x0f0000) {
236 case INSN_CONFIG_DIO_INPUT:
239 case INSN_CONFIG_DIO_OUTPUT:
242 case INSN_CONFIG_DIO_QUERY:
243 data[1] = (s->io_bits & bits) ? COMEDI_OUTPUT : COMEDI_INPUT;
250 do_3724_config(dev, s, insn->chanspec);
251 enable_chan(dev, s, insn->chanspec);
255 static int pcm3724_attach(struct comedi_device *dev, struct comedi_devconfig *it)
257 unsigned long iobase;
258 unsigned int iorange;
259 int ret, i, n_subdevices;
261 iobase = it->options[0];
262 iorange = this_board->io_range;
263 if ((ret = alloc_private(dev, sizeof(struct priv_pcm3724))) < 0)
266 ((struct priv_pcm3724 *) (dev->private))->dio_1 = 0;
267 ((struct priv_pcm3724 *) (dev->private))->dio_2 = 0;
269 printk("comedi%d: pcm3724: board=%s, 0x%03lx ", dev->minor,
270 this_board->name, iobase);
271 if (!iobase || !request_region(iobase, iorange, "pcm3724")) {
272 printk("I/O port conflict\n");
276 dev->iobase = iobase;
277 dev->board_name = this_board->name;
280 n_subdevices = this_board->numofports;
282 if ((ret = alloc_subdevices(dev, n_subdevices)) < 0)
285 for (i = 0; i < dev->n_subdevices; i++) {
286 subdev_8255_init(dev, dev->subdevices + i, subdev_8255_cb,
287 (unsigned long)(dev->iobase + SIZE_8255 * i));
288 ((dev->subdevices) + i)->insn_config = subdev_3724_insn_config;
293 static int pcm3724_detach(struct comedi_device *dev)
297 if (dev->subdevices) {
298 for (i = 0; i < dev->n_subdevices; i++) {
299 subdev_8255_cleanup(dev, dev->subdevices + i);
303 release_region(dev->iobase, this_board->io_range);