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);
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
81 static const boardtype boardtypes[] = {
82 {"pcm3724", 48, 2, 0x00fc, PCM3724_SIZE,},
85 #define n_boardtypes (sizeof(boardtypes)/sizeof(boardtype))
86 #define this_board ((const boardtype *)dev->board_ptr)
88 static struct comedi_driver driver_pcm3724 = {
89 driver_name:"pcm3724",
91 attach:pcm3724_attach,
92 detach:pcm3724_detach,
93 board_name:&boardtypes[0].name,
94 num_names:n_boardtypes,
95 offset:sizeof(boardtype),
98 COMEDI_INITCLEANUP(driver_pcm3724);
100 // (setq c-basic-offset 8)
102 static int subdev_8255_cb(int dir, int port, int data, unsigned long arg)
104 unsigned long iobase = arg;
105 unsigned char inbres;
106 //printk("8255cb %d %d %d %lx\n", dir,port,data,arg);
108 //printk("8255 cb outb(%x, %lx)\n", data, iobase+port);
109 outb(data, iobase + port);
112 inbres = inb(iobase + port);
113 //printk("8255 cb inb(%lx) = %x\n", iobase+port, inbres);
118 static int compute_buffer(int config, int devno, struct comedi_subdevice * s)
120 /* 1 in io_bits indicates output */
121 if (s->io_bits & 0x0000ff) {
128 if (s->io_bits & 0x00ff00) {
135 if (s->io_bits & 0xff0000) {
145 static void do_3724_config(struct comedi_device * dev, struct comedi_subdevice * s,
150 unsigned long port_8255_cfg;
155 /* 1 in io_bits indicates output, 1 in config indicates input */
156 if (!(s->io_bits & 0x0000ff)) {
159 if (!(s->io_bits & 0x00ff00)) {
162 if (!(s->io_bits & 0xff0000)) {
166 buffer_config = compute_buffer(0, 0, dev->subdevices);
167 buffer_config = compute_buffer(buffer_config, 1, (dev->subdevices) + 1);
169 if (s == dev->subdevices) {
170 port_8255_cfg = dev->iobase + _8255_CR;
172 port_8255_cfg = dev->iobase + SIZE_8255 + _8255_CR;
174 outb(buffer_config, dev->iobase + 8); /* update buffer register */
175 //printk("pcm3724 buffer_config (%lx) %d, %x\n", dev->iobase + _8255_CR, chanspec, buffer_config);
176 outb(config, port_8255_cfg);
179 static void enable_chan(struct comedi_device * dev, struct comedi_subdevice * s, int chanspec)
186 priv = (priv_pcm3724 *) (dev->private);
188 mask = 1 << CR_CHAN(chanspec);
189 if (s == dev->subdevices) { // subdev 0
194 if (priv->dio_1 & 0xff0000) {
197 if (priv->dio_1 & 0xff00) {
200 if (priv->dio_1 & 0xff) {
203 if (priv->dio_2 & 0xff0000) {
206 if (priv->dio_2 & 0xff00) {
209 if (priv->dio_2 & 0xff) {
212 // printk("gate control %x\n", gatecfg);
213 outb(gatecfg, dev->iobase + 9);
216 /* overriding the 8255 insn config */
217 static int subdev_3724_insn_config(struct comedi_device * dev, struct comedi_subdevice * s,
218 struct comedi_insn * insn, unsigned int * data)
223 mask = 1 << CR_CHAN(insn->chanspec);
224 if (mask & 0x0000ff) {
226 } else if (mask & 0x00ff00) {
228 } else if (mask & 0x0f0000) {
235 case INSN_CONFIG_DIO_INPUT:
238 case INSN_CONFIG_DIO_OUTPUT:
241 case INSN_CONFIG_DIO_QUERY:
242 data[1] = (s->io_bits & bits) ? COMEDI_OUTPUT : COMEDI_INPUT;
249 do_3724_config(dev, s, insn->chanspec);
250 enable_chan(dev, s, insn->chanspec);
254 static int pcm3724_attach(struct comedi_device * dev, struct comedi_devconfig * it)
256 unsigned long iobase;
257 unsigned int iorange;
258 int ret, i, n_subdevices;
260 iobase = it->options[0];
261 iorange = this_board->io_range;
262 if ((ret = alloc_private(dev, sizeof(priv_pcm3724))) < 0)
265 ((priv_pcm3724 *) (dev->private))->dio_1 = 0;
266 ((priv_pcm3724 *) (dev->private))->dio_2 = 0;
268 printk("comedi%d: pcm3724: board=%s, 0x%03lx ", dev->minor,
269 this_board->name, iobase);
270 if (!iobase || !request_region(iobase, iorange, "pcm3724")) {
271 printk("I/O port conflict\n");
275 dev->iobase = iobase;
276 dev->board_name = this_board->name;
279 n_subdevices = this_board->numofports;
281 if ((ret = alloc_subdevices(dev, n_subdevices)) < 0)
284 for (i = 0; i < dev->n_subdevices; i++) {
285 subdev_8255_init(dev, dev->subdevices + i, subdev_8255_cb,
286 (unsigned long)(dev->iobase + SIZE_8255 * i));
287 ((dev->subdevices) + i)->insn_config = subdev_3724_insn_config;
292 static int pcm3724_detach(struct comedi_device * dev)
296 if (dev->subdevices) {
297 for (i = 0; i < dev->n_subdevices; i++) {
298 subdev_8255_cleanup(dev, dev->subdevices + i);
302 release_region(dev->iobase, this_board->io_range);