diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/fl512.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/fl512.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/drivers/staging/comedi/drivers/fl512.c b/drivers/staging/comedi/drivers/fl512.c new file mode 100644 index 000000000000..6d7bb37d2b1c --- /dev/null +++ b/drivers/staging/comedi/drivers/fl512.c @@ -0,0 +1,186 @@ +/* + comedi/drivers/fl512.c + Anders Gnistrup <ex18@kalman.iau.dtu.dk> +*/ + +/* +Driver: fl512 +Description: unknown +Author: Anders Gnistrup <ex18@kalman.iau.dtu.dk> +Devices: [unknown] FL512 (fl512) +Status: unknown + +Digital I/O is not supported. + +Configuration options: + [0] - I/O port base address +*/ + +#define DEBUG 0 + +#include "../comedidev.h" + +#include <linux/delay.h> +#include <linux/ioport.h> + +#define FL512_SIZE 16 /* the size of the used memory */ +struct fl512_private { + + short ao_readback[2]; +}; + +#define devpriv ((struct fl512_private *) dev->private) + +static const struct comedi_lrange range_fl512 = { 4, { + BIP_RANGE(0.5), + BIP_RANGE(1), + BIP_RANGE(5), + BIP_RANGE(10), + UNI_RANGE(1), + UNI_RANGE(5), + UNI_RANGE(10), + } +}; + +static int fl512_attach(struct comedi_device * dev, struct comedi_devconfig * it); +static int fl512_detach(struct comedi_device * dev); + +static struct comedi_driver driver_fl512 = { + driver_name:"fl512", + module:THIS_MODULE, + attach:fl512_attach, + detach:fl512_detach, +}; + +COMEDI_INITCLEANUP(driver_fl512); + +static int fl512_ai_insn(struct comedi_device * dev, + struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data); +static int fl512_ao_insn(struct comedi_device * dev, + struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data); +static int fl512_ao_insn_readback(struct comedi_device * dev, + struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data); + +/* + * fl512_ai_insn : this is the analog input function + */ +static int fl512_ai_insn(struct comedi_device * dev, + struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data) +{ + int n; + unsigned int lo_byte, hi_byte; + char chan = CR_CHAN(insn->chanspec); + unsigned long iobase = dev->iobase; + + for (n = 0; n < insn->n; n++) { /* sample n times on selected channel */ + /* XXX probably can move next step out of for() loop -- will make + * AI a little bit faster. */ + outb(chan, iobase + 2); /* select chan */ + outb(0, iobase + 3); /* start conversion */ + /* XXX should test "done" flag instead of delay */ + comedi_udelay(30); /* sleep 30 usec */ + lo_byte = inb(iobase + 2); /* low 8 byte */ + hi_byte = inb(iobase + 3) & 0xf; /* high 4 bit and mask */ + data[n] = lo_byte + (hi_byte << 8); + } + return n; +} + +/* + * fl512_ao_insn : used to write to a DA port n times + */ +static int fl512_ao_insn(struct comedi_device * dev, + struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data) +{ + int n; + int chan = CR_CHAN(insn->chanspec); /* get chan to write */ + unsigned long iobase = dev->iobase; /* get base address */ + + for (n = 0; n < insn->n; n++) { /* write n data set */ + outb(data[n] & 0x0ff, iobase + 4 + 2 * chan); /* write low byte */ + outb((data[n] & 0xf00) >> 8, iobase + 4 + 2 * chan); /* write high byte */ + inb(iobase + 4 + 2 * chan); /* trig */ + + devpriv->ao_readback[chan] = data[n]; + } + return n; +} + +/* + * fl512_ao_insn_readback : used to read previous values written to + * DA port + */ +static int fl512_ao_insn_readback(struct comedi_device * dev, + struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data) +{ + int n; + int chan = CR_CHAN(insn->chanspec); + + for (n = 0; n < insn->n; n++) { + data[n] = devpriv->ao_readback[chan]; + } + + return n; +} + +/* + * start attach + */ +static int fl512_attach(struct comedi_device * dev, struct comedi_devconfig * it) +{ + unsigned long iobase; + struct comedi_subdevice *s; /* pointer to the subdevice: + Analog in, Analog out, ( not made ->and Digital IO) */ + + iobase = it->options[0]; + printk("comedi:%d fl512: 0x%04lx", dev->minor, iobase); + if (!request_region(iobase, FL512_SIZE, "fl512")) { + printk(" I/O port conflict\n"); + return -EIO; + } + dev->iobase = iobase; + dev->board_name = "fl512"; + if (alloc_private(dev, sizeof(struct fl512_private)) < 0) + return -ENOMEM; + +#if DEBUG + printk("malloc ok\n"); +#endif + + if (alloc_subdevices(dev, 2) < 0) + return -ENOMEM; + + /* + * this if the definitions of the supdevices, 2 have been defined + */ + /* Analog indput */ + s = dev->subdevices + 0; + s->type = COMEDI_SUBD_AI; /* define subdevice as Analog In */ + s->subdev_flags = SDF_READABLE | SDF_GROUND; /* you can read it from userspace */ + s->n_chan = 16; /* Number of Analog input channels */ + s->maxdata = 0x0fff; /* accept only 12 bits of data */ + s->range_table = &range_fl512; /* device use one of the ranges */ + s->insn_read = fl512_ai_insn; /* function to call when read AD */ + printk("comedi: fl512: subdevice 0 initialized\n"); + + /* Analog output */ + s = dev->subdevices + 1; + s->type = COMEDI_SUBD_AO; /* define subdevice as Analog OUT */ + s->subdev_flags = SDF_WRITABLE; /* you can write it from userspace */ + s->n_chan = 2; /* Number of Analog output channels */ + s->maxdata = 0x0fff; /* accept only 12 bits of data */ + s->range_table = &range_fl512; /* device use one of the ranges */ + s->insn_write = fl512_ao_insn; /* function to call when write DA */ + s->insn_read = fl512_ao_insn_readback; /* function to call when reading DA */ + printk("comedi: fl512: subdevice 1 initialized\n"); + + return 1; +} + +static int fl512_detach(struct comedi_device * dev) +{ + if (dev->iobase) + release_region(dev->iobase, FL512_SIZE); + printk("comedi%d: fl512: dummy i detach\n", dev->minor); + return 0; +} |