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 /* used to track configured dios */
71 static int subdev_8255_cb(int dir
, int port
, int data
, unsigned long arg
)
73 unsigned long iobase
= arg
;
75 /* printk("8255cb %d %d %d %lx\n", dir,port,data,arg); */
77 /* printk("8255 cb outb(%x, %lx)\n", data, iobase+port); */
78 outb(data
, iobase
+ port
);
81 inbres
= inb(iobase
+ port
);
82 /* printk("8255 cb inb(%lx) = %x\n", iobase+port, inbres); */
87 static int compute_buffer(int config
, int devno
, struct comedi_subdevice
*s
)
89 /* 1 in io_bits indicates output */
90 if (s
->io_bits
& 0x0000ff) {
96 if (s
->io_bits
& 0x00ff00) {
102 if (s
->io_bits
& 0xff0000) {
111 static void do_3724_config(struct comedi_device
*dev
,
112 struct comedi_subdevice
*s
, int chanspec
)
114 struct comedi_subdevice
*s_dio1
= &dev
->subdevices
[0];
115 struct comedi_subdevice
*s_dio2
= &dev
->subdevices
[1];
118 unsigned long port_8255_cfg
;
123 /* 1 in io_bits indicates output, 1 in config indicates input */
124 if (!(s
->io_bits
& 0x0000ff))
127 if (!(s
->io_bits
& 0x00ff00))
130 if (!(s
->io_bits
& 0xff0000))
133 buffer_config
= compute_buffer(0, 0, s_dio1
);
134 buffer_config
= compute_buffer(buffer_config
, 1, s_dio2
);
137 port_8255_cfg
= dev
->iobase
+ _8255_CR
;
139 port_8255_cfg
= dev
->iobase
+ SIZE_8255
+ _8255_CR
;
141 outb(buffer_config
, dev
->iobase
+ 8); /* update buffer register */
142 /* printk("pcm3724 buffer_config (%lx) %d, %x\n",
143 dev->iobase + _8255_CR, chanspec, buffer_config); */
145 outb(config
, port_8255_cfg
);
148 static void enable_chan(struct comedi_device
*dev
, struct comedi_subdevice
*s
,
151 struct priv_pcm3724
*priv
= dev
->private;
152 struct comedi_subdevice
*s_dio1
= &dev
->subdevices
[0];
158 mask
= 1 << CR_CHAN(chanspec
);
164 if (priv
->dio_1
& 0xff0000)
167 if (priv
->dio_1
& 0xff00)
170 if (priv
->dio_1
& 0xff)
173 if (priv
->dio_2
& 0xff0000)
176 if (priv
->dio_2
& 0xff00)
179 if (priv
->dio_2
& 0xff)
182 /* printk("gate control %x\n", gatecfg); */
183 outb(gatecfg
, dev
->iobase
+ 9);
186 /* overriding the 8255 insn config */
187 static int subdev_3724_insn_config(struct comedi_device
*dev
,
188 struct comedi_subdevice
*s
,
189 struct comedi_insn
*insn
, unsigned int *data
)
194 mask
= 1 << CR_CHAN(insn
->chanspec
);
197 else if (mask
& 0x00ff00)
199 else if (mask
& 0x0f0000)
205 case INSN_CONFIG_DIO_INPUT
:
208 case INSN_CONFIG_DIO_OUTPUT
:
211 case INSN_CONFIG_DIO_QUERY
:
212 data
[1] = (s
->io_bits
& bits
) ? COMEDI_OUTPUT
: COMEDI_INPUT
;
219 do_3724_config(dev
, s
, insn
->chanspec
);
220 enable_chan(dev
, s
, insn
->chanspec
);
224 static int pcm3724_attach(struct comedi_device
*dev
,
225 struct comedi_devconfig
*it
)
227 struct priv_pcm3724
*priv
;
228 struct comedi_subdevice
*s
;
231 priv
= kzalloc(sizeof(*priv
), GFP_KERNEL
);
236 ret
= comedi_request_region(dev
, it
->options
[0], PCM3724_SIZE
);
240 ret
= comedi_alloc_subdevices(dev
, 2);
244 for (i
= 0; i
< dev
->n_subdevices
; i
++) {
245 s
= &dev
->subdevices
[i
];
246 subdev_8255_init(dev
, s
, subdev_8255_cb
,
247 (unsigned long)(dev
->iobase
+ SIZE_8255
* i
));
248 s
->insn_config
= subdev_3724_insn_config
;
253 static void pcm3724_detach(struct comedi_device
*dev
)
257 for (i
= 0; i
< dev
->n_subdevices
; i
++)
258 comedi_spriv_free(dev
, i
);
259 comedi_legacy_detach(dev
);
262 static struct comedi_driver pcm3724_driver
= {
263 .driver_name
= "pcm3724",
264 .module
= THIS_MODULE
,
265 .attach
= pcm3724_attach
,
266 .detach
= pcm3724_detach
,
268 module_comedi_driver(pcm3724_driver
);
270 MODULE_AUTHOR("Comedi http://www.comedi.org");
271 MODULE_DESCRIPTION("Comedi low-level driver");
272 MODULE_LICENSE("GPL");