| /* |
| 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 <ds@schleef.org> |
| |
| 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 <linux/pci.h> |
| #include <linux/delay.h> |
| #include <linux/interrupt.h> |
| |
| #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"); |