3 Anders Gnistrup <ex18@kalman.iau.dtu.dk>
9 Author: Anders Gnistrup <ex18@kalman.iau.dtu.dk>
10 Devices: [unknown] FL512 (fl512)
13 Digital I/O is not supported.
15 Configuration options:
16 [0] - I/O port base address
21 #include "../comedidev.h"
23 #include <linux/delay.h>
24 #include <linux/ioport.h>
26 #define FL512_SIZE 16 /* the size of the used memory */
27 struct fl512_private {
32 #define devpriv ((struct fl512_private *) dev->private)
34 static const struct comedi_lrange range_fl512 = { 4, {
45 static int fl512_attach(struct comedi_device * dev, struct comedi_devconfig * it);
46 static int fl512_detach(struct comedi_device * dev);
48 static struct comedi_driver driver_fl512 = {
55 COMEDI_INITCLEANUP(driver_fl512);
57 static int fl512_ai_insn(struct comedi_device * dev,
58 struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data);
59 static int fl512_ao_insn(struct comedi_device * dev,
60 struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data);
61 static int fl512_ao_insn_readback(struct comedi_device * dev,
62 struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data);
65 * fl512_ai_insn : this is the analog input function
67 static int fl512_ai_insn(struct comedi_device * dev,
68 struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data)
71 unsigned int lo_byte, hi_byte;
72 char chan = CR_CHAN(insn->chanspec);
73 unsigned long iobase = dev->iobase;
75 for (n = 0; n < insn->n; n++) { /* sample n times on selected channel */
76 /* XXX probably can move next step out of for() loop -- will make
77 * AI a little bit faster. */
78 outb(chan, iobase + 2); /* select chan */
79 outb(0, iobase + 3); /* start conversion */
80 /* XXX should test "done" flag instead of delay */
81 comedi_udelay(30); /* sleep 30 usec */
82 lo_byte = inb(iobase + 2); /* low 8 byte */
83 hi_byte = inb(iobase + 3) & 0xf; /* high 4 bit and mask */
84 data[n] = lo_byte + (hi_byte << 8);
90 * fl512_ao_insn : used to write to a DA port n times
92 static int fl512_ao_insn(struct comedi_device * dev,
93 struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data)
96 int chan = CR_CHAN(insn->chanspec); /* get chan to write */
97 unsigned long iobase = dev->iobase; /* get base address */
99 for (n = 0; n < insn->n; n++) { /* write n data set */
100 outb(data[n] & 0x0ff, iobase + 4 + 2 * chan); /* write low byte */
101 outb((data[n] & 0xf00) >> 8, iobase + 4 + 2 * chan); /* write high byte */
102 inb(iobase + 4 + 2 * chan); /* trig */
104 devpriv->ao_readback[chan] = data[n];
110 * fl512_ao_insn_readback : used to read previous values written to
113 static int fl512_ao_insn_readback(struct comedi_device * dev,
114 struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data)
117 int chan = CR_CHAN(insn->chanspec);
119 for (n = 0; n < insn->n; n++) {
120 data[n] = devpriv->ao_readback[chan];
129 static int fl512_attach(struct comedi_device * dev, struct comedi_devconfig * it)
131 unsigned long iobase;
132 struct comedi_subdevice *s; /* pointer to the subdevice:
133 Analog in, Analog out, ( not made ->and Digital IO) */
135 iobase = it->options[0];
136 printk("comedi:%d fl512: 0x%04lx", dev->minor, iobase);
137 if (!request_region(iobase, FL512_SIZE, "fl512")) {
138 printk(" I/O port conflict\n");
141 dev->iobase = iobase;
142 dev->board_name = "fl512";
143 if (alloc_private(dev, sizeof(struct fl512_private)) < 0)
147 printk("malloc ok\n");
150 if (alloc_subdevices(dev, 2) < 0)
154 * this if the definitions of the supdevices, 2 have been defined
157 s = dev->subdevices + 0;
158 s->type = COMEDI_SUBD_AI; /* define subdevice as Analog In */
159 s->subdev_flags = SDF_READABLE | SDF_GROUND; /* you can read it from userspace */
160 s->n_chan = 16; /* Number of Analog input channels */
161 s->maxdata = 0x0fff; /* accept only 12 bits of data */
162 s->range_table = &range_fl512; /* device use one of the ranges */
163 s->insn_read = fl512_ai_insn; /* function to call when read AD */
164 printk("comedi: fl512: subdevice 0 initialized\n");
167 s = dev->subdevices + 1;
168 s->type = COMEDI_SUBD_AO; /* define subdevice as Analog OUT */
169 s->subdev_flags = SDF_WRITABLE; /* you can write it from userspace */
170 s->n_chan = 2; /* Number of Analog output channels */
171 s->maxdata = 0x0fff; /* accept only 12 bits of data */
172 s->range_table = &range_fl512; /* device use one of the ranges */
173 s->insn_write = fl512_ao_insn; /* function to call when write DA */
174 s->insn_read = fl512_ao_insn_readback; /* function to call when reading DA */
175 printk("comedi: fl512: subdevice 1 initialized\n");
180 static int fl512_detach(struct comedi_device * dev)
183 release_region(dev->iobase, FL512_SIZE);
184 printk("comedi%d: fl512: dummy i detach\n", dev->minor);