/* comedi/drivers/poc.c Mini-drivers for POC (Piece of Crap) boards Copyright (C) 2000 Frank Mori Hess Copyright (C) 2001 David A. Schleef This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* Driver: poc Description: Generic driver for very simple devices Author: ds Devices: [Keithley Metrabyte] DAC-02 (dac02), [Advantech] PCL-733 (pcl733), PCL-734 (pcl734) Updated: Sat, 16 Mar 2002 17:34:48 -0800 Status: unknown This driver is indended to support very simple ISA-based devices, including: dac02 - Keithley DAC-02 analog output board pcl733 - Advantech PCL-733 pcl734 - Advantech PCL-734 Configuration options: [0] - I/O port base */ #include "../comedidev.h" #include static int poc_attach(struct comedi_device * dev, struct comedi_devconfig * it); static int poc_detach(struct comedi_device * dev); static int readback_insn(struct comedi_device * dev, struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data); static int dac02_ao_winsn(struct comedi_device * dev, struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data); static int pcl733_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data); static int pcl734_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data); struct boarddef_struct { const char *name; unsigned int iosize; int (*setup) (struct comedi_device *); int type; int n_chan; int n_bits; int (*winsn) (struct comedi_device *, struct comedi_subdevice *, struct comedi_insn *, unsigned int *); int (*rinsn) (struct comedi_device *, struct comedi_subdevice *, struct comedi_insn *, unsigned int *); int (*insnbits) (struct comedi_device *, struct comedi_subdevice *, struct comedi_insn *, unsigned int *); const struct comedi_lrange *range; }; static const struct boarddef_struct boards[] = { { name: "dac02", iosize: 8, /* setup: dac02_setup, */ type: COMEDI_SUBD_AO, n_chan: 2, n_bits: 12, winsn: dac02_ao_winsn, rinsn: readback_insn, range: &range_unknown, }, { name: "pcl733", iosize: 4, type: COMEDI_SUBD_DI, n_chan: 32, n_bits: 1, insnbits:pcl733_insn_bits, range: &range_digital, }, { name: "pcl734", iosize: 4, type: COMEDI_SUBD_DO, n_chan: 32, n_bits: 1, insnbits:pcl734_insn_bits, range: &range_digital, }, }; #define n_boards (sizeof(boards)/sizeof(boards[0])) #define this_board ((const struct boarddef_struct *)dev->board_ptr) static struct comedi_driver driver_poc = { driver_name:"poc", module:THIS_MODULE, attach:poc_attach, detach:poc_detach, board_name:&boards[0].name, num_names:n_boards, offset:sizeof(boards[0]), }; static int poc_attach(struct comedi_device * dev, struct comedi_devconfig * it) { struct comedi_subdevice *s; unsigned long iobase; unsigned int iosize; iobase = it->options[0]; printk("comedi%d: poc: using %s iobase 0x%lx\n", dev->minor, this_board->name, iobase); dev->board_name = this_board->name; if (iobase == 0) { printk("io base address required\n"); return -EINVAL; } iosize = this_board->iosize; /* check if io addresses are available */ if (!request_region(iobase, iosize, "dac02")) { printk("I/O port conflict: failed to allocate ports 0x%lx to 0x%lx\n", iobase, iobase + iosize - 1); return -EIO; } dev->iobase = iobase; if (alloc_subdevices(dev, 1) < 0) return -ENOMEM; if (alloc_private(dev, sizeof(unsigned int) * this_board->n_chan) < 0) return -ENOMEM; /* analog output subdevice */ s = dev->subdevices + 0; s->type = this_board->type; s->n_chan = this_board->n_chan; s->maxdata = (1 << this_board->n_bits) - 1; s->range_table = this_board->range; s->insn_write = this_board->winsn; s->insn_read = this_board->rinsn; s->insn_bits = this_board->insnbits; if (s->type == COMEDI_SUBD_AO || s->type == COMEDI_SUBD_DO) { s->subdev_flags = SDF_WRITABLE; } return 0; } static int poc_detach(struct comedi_device * dev) { /* only free stuff if it has been allocated by _attach */ if (dev->iobase) release_region(dev->iobase, this_board->iosize); printk("comedi%d: dac02: remove\n", dev->minor); return 0; } static int readback_insn(struct comedi_device * dev, struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data) { int chan; chan = CR_CHAN(insn->chanspec); data[0] = ((unsigned int *) dev->private)[chan]; return 1; } /* DAC-02 registers */ #define DAC02_LSB(a) (2 * a) #define DAC02_MSB(a) (2 * a + 1) static int dac02_ao_winsn(struct comedi_device * dev, struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data) { int temp; int chan; int output; chan = CR_CHAN(insn->chanspec); ((unsigned int *) dev->private)[chan] = data[0]; output = data[0]; #ifdef wrong /* convert to complementary binary if range is bipolar */ if ((CR_RANGE(insn->chanspec) & 0x2) == 0) output = ~output; #endif temp = (output << 4) & 0xf0; outb(temp, dev->iobase + DAC02_LSB(chan)); temp = (output >> 4) & 0xff; outb(temp, dev->iobase + DAC02_MSB(chan)); return 1; } static int pcl733_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data) { if (insn->n != 2) return -EINVAL; data[1] = inb(dev->iobase + 0); data[1] |= (inb(dev->iobase + 1) << 8); data[1] |= (inb(dev->iobase + 2) << 16); data[1] |= (inb(dev->iobase + 3) << 24); return 2; } static int pcl734_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data) { if (insn->n != 2) return -EINVAL; if (data[0]) { s->state &= ~data[0]; s->state |= (data[0] & data[1]); if ((data[0] >> 0) & 0xff) outb((s->state >> 0) & 0xff, dev->iobase + 0); if ((data[0] >> 8) & 0xff) outb((s->state >> 8) & 0xff, dev->iobase + 1); if ((data[0] >> 16) & 0xff) outb((s->state >> 16) & 0xff, dev->iobase + 2); if ((data[0] >> 24) & 0xff) outb((s->state >> 24) & 0xff, dev->iobase + 3); } data[1] = s->state; return 2; } COMEDI_INITCLEANUP(driver_poc);