/* comedi/drivers/cb_pcimdas.c Comedi driver for Computer Boards PCIM-DAS1602/16 COMEDI - Linux Control and Measurement Device Interface Copyright (C) 2000 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: cb_pcimdas Description: Measurement Computing PCI Migration series boards Devices: [ComputerBoards] PCIM-DAS1602/16 (cb_pcimdas) Author: Richard Bytheway Updated: Wed, 13 Nov 2002 12:34:56 +0000 Status: experimental Written to support the PCIM-DAS1602/16 on a 2.4 series kernel. Configuration Options: [0] - PCI bus number [1] - PCI slot number Developed from cb_pcidas and skel by Richard Bytheway (mocelet@sucs.org). Only supports DIO, AO and simple AI in it's present form. No interrupts, multi channel or FIFO AI, although the card looks like it could support this. See http://www.mccdaq.com/PDFs/Manuals/pcim-das1602-16.pdf for more details. */ #include #include #include #include "../comedidev.h" #include "plx9052.h" #include "8255.h" /* #define CBPCIMDAS_DEBUG */ #undef CBPCIMDAS_DEBUG /* Registers for the PCIM-DAS1602/16 */ /* sizes of io regions (bytes) */ #define BADR3_SIZE 16 /* DAC Offsets */ #define ADC_TRIG 0 #define DAC0_OFFSET 2 #define DAC1_OFFSET 4 /* AI and Counter Constants */ #define MUX_LIMITS 0 #define MAIN_CONN_DIO 1 #define ADC_STAT 2 #define ADC_CONV_STAT 3 #define ADC_INT 4 #define ADC_PACER 5 #define BURST_MODE 6 #define PROG_GAIN 7 #define CLK8254_1_DATA 8 #define CLK8254_2_DATA 9 #define CLK8254_3_DATA 10 #define CLK8254_CONTROL 11 #define USER_COUNTER 12 #define RESID_COUNT_H 13 #define RESID_COUNT_L 14 /* * this structure is for data unique to this hardware driver. If * several hardware drivers keep similar information in this structure, * feel free to suggest moving the variable to the struct comedi_device * struct. */ struct cb_pcimdas_private { /* base addresses */ unsigned long BADR3; /* Used for AO readback */ unsigned int ao_readback[2]; }; /* * "instructions" read/write data in "one-shot" or "software-triggered" * mode. */ static int cb_pcimdas_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { struct cb_pcimdas_private *devpriv = dev->private; int n, i; unsigned int d; unsigned int busy; int chan = CR_CHAN(insn->chanspec); unsigned short chanlims; int maxchans; /* only support sw initiated reads from a single channel */ /* check channel number */ if ((inb(devpriv->BADR3 + 2) & 0x20) == 0) /* differential mode */ maxchans = s->n_chan / 2; else maxchans = s->n_chan; if (chan > (maxchans - 1)) return -ETIMEDOUT; /* *** Wrong error code. Fixme. */ /* configure for sw initiated read */ d = inb(devpriv->BADR3 + 5); if ((d & 0x03) > 0) { /* only reset if needed. */ d = d & 0xfd; outb(d, devpriv->BADR3 + 5); } outb(0x01, devpriv->BADR3 + 6); /* set bursting off, conversions on */ outb(0x00, devpriv->BADR3 + 7); /* set range to 10V. UP/BP is controlled by a switch on the board */ /* * write channel limits to multiplexer, set Low (bits 0-3) and * High (bits 4-7) channels to chan. */ chanlims = chan | (chan << 4); outb(chanlims, devpriv->BADR3 + 0); /* convert n samples */ for (n = 0; n < insn->n; n++) { /* trigger conversion */ outw(0, dev->iobase + 0); #define TIMEOUT 1000 /* typically takes 5 loops on a lightly loaded Pentium 100MHz, */ /* this is likely to be 100 loops on a 2GHz machine, so set 1000 as the limit. */ /* wait for conversion to end */ for (i = 0; i < TIMEOUT; i++) { busy = inb(devpriv->BADR3 + 2) & 0x80; if (!busy) break; } if (i == TIMEOUT) { printk("timeout\n"); return -ETIMEDOUT; } /* read data */ data[n] = inw(dev->iobase + 0); } /* return the number of samples read/written */ return n; } static int cb_pcimdas_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { struct cb_pcimdas_private *devpriv = dev->private; int i; int chan = CR_CHAN(insn->chanspec); /* Writing a list of values to an AO channel is probably not * very useful, but that's how the interface is defined. */ for (i = 0; i < insn->n; i++) { switch (chan) { case 0: outw(data[i] & 0x0FFF, dev->iobase + DAC0_OFFSET); break; case 1: outw(data[i] & 0x0FFF, dev->iobase + DAC1_OFFSET); break; default: return -1; } devpriv->ao_readback[chan] = data[i]; } /* return the number of samples read/written */ return i; } /* AO subdevices should have a read insn as well as a write insn. * Usually this means copying a value stored in devpriv. */ static int cb_pcimdas_ao_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { struct cb_pcimdas_private *devpriv = dev->private; int i; int chan = CR_CHAN(insn->chanspec); for (i = 0; i < insn->n; i++) data[i] = devpriv->ao_readback[chan]; return i; } static int cb_pcimdas_auto_attach(struct comedi_device *dev, unsigned long context_unused) { struct pci_dev *pcidev = comedi_to_pci_dev(dev); struct cb_pcimdas_private *devpriv; struct comedi_subdevice *s; unsigned long iobase_8255; int ret; devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL); if (!devpriv) return -ENOMEM; dev->private = devpriv; ret = comedi_pci_enable(dev); if (ret) return ret; dev->iobase = pci_resource_start(pcidev, 2); devpriv->BADR3 = pci_resource_start(pcidev, 3); iobase_8255 = pci_resource_start(pcidev, 4); /* Dont support IRQ yet */ /* get irq */ /* if(request_irq(pcidev->irq, cb_pcimdas_interrupt, IRQF_SHARED, "cb_pcimdas", dev )) */ /* { */ /* printk(" unable to allocate irq %u\n", pcidev->irq); */ /* return -EINVAL; */ /* } */ /* dev->irq = pcidev->irq; */ ret = comedi_alloc_subdevices(dev, 3); if (ret) return ret; s = &dev->subdevices[0]; /* dev->read_subdev=s; */ /* analog input subdevice */ s->type = COMEDI_SUBD_AI; s->subdev_flags = SDF_READABLE | SDF_GROUND; s->n_chan = 16; s->maxdata = 0xffff; s->range_table = &range_unknown; s->len_chanlist = 1; /* This is the maximum chanlist length that */ /* the board can handle */ s->insn_read = cb_pcimdas_ai_rinsn; s = &dev->subdevices[1]; /* analog output subdevice */ s->type = COMEDI_SUBD_AO; s->subdev_flags = SDF_WRITABLE; s->n_chan = 2; s->maxdata = 0xfff; /* ranges are hardware settable, but not software readable. */ s->range_table = &range_unknown; s->insn_write = &cb_pcimdas_ao_winsn; s->insn_read = &cb_pcimdas_ao_rinsn; s = &dev->subdevices[2]; /* digital i/o subdevice */ subdev_8255_init(dev, s, NULL, iobase_8255); dev_info(dev->class_dev, "%s attached\n", dev->board_name); return 0; } static void cb_pcimdas_detach(struct comedi_device *dev) { if (dev->irq) free_irq(dev->irq, dev); comedi_pci_disable(dev); } static struct comedi_driver cb_pcimdas_driver = { .driver_name = "cb_pcimdas", .module = THIS_MODULE, .auto_attach = cb_pcimdas_auto_attach, .detach = cb_pcimdas_detach, }; static int cb_pcimdas_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) { return comedi_pci_auto_config(dev, &cb_pcimdas_driver, id->driver_data); } static DEFINE_PCI_DEVICE_TABLE(cb_pcimdas_pci_table) = { { PCI_DEVICE(PCI_VENDOR_ID_CB, 0x0056) }, { 0 } }; MODULE_DEVICE_TABLE(pci, cb_pcimdas_pci_table); static struct pci_driver cb_pcimdas_pci_driver = { .name = "cb_pcimdas", .id_table = cb_pcimdas_pci_table, .probe = cb_pcimdas_pci_probe, .remove = comedi_pci_auto_unconfig, }; module_comedi_pci_driver(cb_pcimdas_driver, cb_pcimdas_pci_driver); MODULE_AUTHOR("Comedi http://www.comedi.org"); MODULE_DESCRIPTION("Comedi low-level driver"); MODULE_LICENSE("GPL");