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Staging: comedi: add cb_pcimdas driver
For Measurement Computing PCI Migration series boards From: Richard Bytheway <mocelet@sucs.org> Cc: David Schleef <ds@schleef.org> Cc: Frank Mori Hess <fmhess@users.sourceforge.net> Cc: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Richard Bytheway
committed by
Greg Kroah-Hartman
Greg Kroah-Hartman
parent
6a5c866476
commit
f4bd8abb37
484
drivers/staging/comedi/drivers/cb_pcimdas.c
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484
drivers/staging/comedi/drivers/cb_pcimdas.c
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@@ -0,0 +1,484 @@
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/*
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comedi/drivers/cb_pcimdas.c
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Comedi driver for Computer Boards PCIM-DAS1602/16
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COMEDI - Linux Control and Measurement Device Interface
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Copyright (C) 2000 David A. Schleef <ds@schleef.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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Driver: cb_pcimdas
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Description: Measurement Computing PCI Migration series boards
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Devices: [ComputerBoards] PCIM-DAS1602/16 (cb_pcimdas)
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Author: Richard Bytheway
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Updated: Wed, 13 Nov 2002 12:34:56 +0000
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Status: experimental
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Written to support the PCIM-DAS1602/16 on a 2.4 series kernel.
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Configuration Options:
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[0] - PCI bus number
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[1] - PCI slot number
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Developed from cb_pcidas and skel by Richard Bytheway (mocelet@sucs.org).
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Only supports DIO, AO and simple AI in it's present form.
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No interrupts, multi channel or FIFO AI, although the card looks like it could support this.
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See http://www.measurementcomputing.com/PDFManuals/pcim-das1602_16.pdf for more details.
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*/
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#include "../comedidev.h"
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#include <linux/delay.h>
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#include "comedi_pci.h"
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#include "plx9052.h"
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#include "8255.h"
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//#define CBPCIMDAS_DEBUG
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#undef CBPCIMDAS_DEBUG
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/* Registers for the PCIM-DAS1602/16 */
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// sizes of io regions (bytes)
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#define BADR0_SIZE 2 //??
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#define BADR1_SIZE 4
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#define BADR2_SIZE 6
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#define BADR3_SIZE 16
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#define BADR4_SIZE 4
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//DAC Offsets
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#define ADC_TRIG 0
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#define DAC0_OFFSET 2
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#define DAC1_OFFSET 4
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//AI and Counter Constants
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#define MUX_LIMITS 0
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#define MAIN_CONN_DIO 1
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#define ADC_STAT 2
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#define ADC_CONV_STAT 3
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#define ADC_INT 4
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#define ADC_PACER 5
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#define BURST_MODE 6
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#define PROG_GAIN 7
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#define CLK8254_1_DATA 8
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#define CLK8254_2_DATA 9
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#define CLK8254_3_DATA 10
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#define CLK8254_CONTROL 11
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#define USER_COUNTER 12
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#define RESID_COUNT_H 13
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#define RESID_COUNT_L 14
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/* Board description */
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typedef struct cb_pcimdas_board_struct {
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const char *name;
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unsigned short device_id;
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int ai_se_chans; // Inputs in single-ended mode
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int ai_diff_chans; // Inputs in differential mode
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int ai_bits; // analog input resolution
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int ai_speed; // fastest conversion period in ns
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int ao_nchan; // number of analog out channels
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int ao_bits; // analogue output resolution
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int has_ao_fifo; // analog output has fifo
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int ao_scan_speed; // analog output speed for 1602 series (for a scan, not conversion)
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int fifo_size; // number of samples fifo can hold
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int dio_bits; // number of dio bits
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int has_dio; // has DIO
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const comedi_lrange *ranges;
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} cb_pcimdas_board;
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static const cb_pcimdas_board cb_pcimdas_boards[] = {
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{
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name: "PCIM-DAS1602/16",
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device_id:0x56,
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ai_se_chans:16,
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ai_diff_chans:8,
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ai_bits: 16,
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ai_speed:10000, //??
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ao_nchan:2,
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ao_bits: 12,
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has_ao_fifo:0, //??
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ao_scan_speed:10000,
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//??
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fifo_size:1024,
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dio_bits:24,
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has_dio: 1,
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// ranges: &cb_pcimdas_ranges,
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},
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};
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/* This is used by modprobe to translate PCI IDs to drivers. Should
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* only be used for PCI and ISA-PnP devices */
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static DEFINE_PCI_DEVICE_TABLE(cb_pcimdas_pci_table) = {
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{PCI_VENDOR_ID_COMPUTERBOARDS, 0x0056, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
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{0}
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};
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MODULE_DEVICE_TABLE(pci, cb_pcimdas_pci_table);
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#define N_BOARDS 1 // Max number of boards supported
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/*
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* Useful for shorthand access to the particular board structure
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*/
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#define thisboard ((const cb_pcimdas_board *)dev->board_ptr)
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/* this structure is for data unique to this hardware driver. If
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several hardware drivers keep similar information in this structure,
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feel free to suggest moving the variable to the comedi_device struct. */
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typedef struct {
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int data;
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// would be useful for a PCI device
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struct pci_dev *pci_dev;
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//base addresses
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unsigned long BADR0;
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unsigned long BADR1;
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unsigned long BADR2;
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unsigned long BADR3;
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unsigned long BADR4;
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/* Used for AO readback */
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lsampl_t ao_readback[2];
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// Used for DIO
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unsigned short int port_a; // copy of BADR4+0
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unsigned short int port_b; // copy of BADR4+1
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unsigned short int port_c; // copy of BADR4+2
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unsigned short int dio_mode; // copy of BADR4+3
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} cb_pcimdas_private;
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/*
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* most drivers define the following macro to make it easy to
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* access the private structure.
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*/
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#define devpriv ((cb_pcimdas_private *)dev->private)
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/*
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* The comedi_driver structure tells the Comedi core module
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* which functions to call to configure/deconfigure (attach/detach)
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* the board, and also about the kernel module that contains
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* the device code.
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*/
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static int cb_pcimdas_attach(comedi_device * dev, comedi_devconfig * it);
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static int cb_pcimdas_detach(comedi_device * dev);
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static comedi_driver driver_cb_pcimdas = {
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driver_name:"cb_pcimdas",
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module:THIS_MODULE,
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attach:cb_pcimdas_attach,
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detach:cb_pcimdas_detach,
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};
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static int cb_pcimdas_ai_rinsn(comedi_device * dev, comedi_subdevice * s,
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comedi_insn * insn, lsampl_t * data);
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static int cb_pcimdas_ao_winsn(comedi_device * dev, comedi_subdevice * s,
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comedi_insn * insn, lsampl_t * data);
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static int cb_pcimdas_ao_rinsn(comedi_device * dev, comedi_subdevice * s,
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comedi_insn * insn, lsampl_t * data);
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/*
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* Attach is called by the Comedi core to configure the driver
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* for a particular board. If you specified a board_name array
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* in the driver structure, dev->board_ptr contains that
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* address.
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*/
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static int cb_pcimdas_attach(comedi_device * dev, comedi_devconfig * it)
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{
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comedi_subdevice *s;
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struct pci_dev *pcidev;
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int index;
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//int i;
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printk("comedi%d: cb_pcimdas: ", dev->minor);
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/*
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* Allocate the private structure area.
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*/
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if (alloc_private(dev, sizeof(cb_pcimdas_private)) < 0)
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return -ENOMEM;
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/*
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* Probe the device to determine what device in the series it is.
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*/
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printk("\n");
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for (pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
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pcidev != NULL;
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pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pcidev)) {
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// is it not a computer boards card?
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if (pcidev->vendor != PCI_VENDOR_ID_COMPUTERBOARDS)
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continue;
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// loop through cards supported by this driver
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for (index = 0; index < N_BOARDS; index++) {
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if (cb_pcimdas_boards[index].device_id !=
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pcidev->device)
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continue;
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// was a particular bus/slot requested?
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if (it->options[0] || it->options[1]) {
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// are we on the wrong bus/slot?
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if (pcidev->bus->number != it->options[0] ||
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PCI_SLOT(pcidev->devfn) !=
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it->options[1]) {
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continue;
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}
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}
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devpriv->pci_dev = pcidev;
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dev->board_ptr = cb_pcimdas_boards + index;
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goto found;
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}
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}
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printk("No supported ComputerBoards/MeasurementComputing card found on "
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"requested position\n");
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return -EIO;
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found:
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printk("Found %s on bus %i, slot %i\n", cb_pcimdas_boards[index].name,
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pcidev->bus->number, PCI_SLOT(pcidev->devfn));
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// Warn about non-tested features
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switch (thisboard->device_id) {
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case 0x56:
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break;
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default:
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printk("THIS CARD IS UNSUPPORTED.\n"
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"PLEASE REPORT USAGE TO <mocelet@sucs.org>\n");
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};
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if (comedi_pci_enable(pcidev, "cb_pcimdas")) {
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printk(" Failed to enable PCI device and request regions\n");
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return -EIO;
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}
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devpriv->BADR0 = pci_resource_start(devpriv->pci_dev, 0);
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devpriv->BADR1 = pci_resource_start(devpriv->pci_dev, 1);
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devpriv->BADR2 = pci_resource_start(devpriv->pci_dev, 2);
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devpriv->BADR3 = pci_resource_start(devpriv->pci_dev, 3);
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devpriv->BADR4 = pci_resource_start(devpriv->pci_dev, 4);
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#ifdef CBPCIMDAS_DEBUG
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printk("devpriv->BADR0 = 0x%lx\n", devpriv->BADR0);
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printk("devpriv->BADR1 = 0x%lx\n", devpriv->BADR1);
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printk("devpriv->BADR2 = 0x%lx\n", devpriv->BADR2);
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printk("devpriv->BADR3 = 0x%lx\n", devpriv->BADR3);
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printk("devpriv->BADR4 = 0x%lx\n", devpriv->BADR4);
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#endif
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// Dont support IRQ yet
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// // get irq
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// if(comedi_request_irq(devpriv->pci_dev->irq, cb_pcimdas_interrupt, IRQF_SHARED, "cb_pcimdas", dev ))
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// {
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// printk(" unable to allocate irq %u\n", devpriv->pci_dev->irq);
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// return -EINVAL;
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// }
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// dev->irq = devpriv->pci_dev->irq;
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//Initialize dev->board_name
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dev->board_name = thisboard->name;
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/*
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* Allocate the subdevice structures. alloc_subdevice() is a
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* convenient macro defined in comedidev.h.
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*/
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if (alloc_subdevices(dev, 3) < 0)
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return -ENOMEM;
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s = dev->subdevices + 0;
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//dev->read_subdev=s;
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// analog input subdevice
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s->type = COMEDI_SUBD_AI;
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s->subdev_flags = SDF_READABLE | SDF_GROUND;
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s->n_chan = thisboard->ai_se_chans;
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s->maxdata = (1 << thisboard->ai_bits) - 1;
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s->range_table = &range_unknown;
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s->len_chanlist = 1; // This is the maximum chanlist length that
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// the board can handle
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s->insn_read = cb_pcimdas_ai_rinsn;
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s = dev->subdevices + 1;
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// analog output subdevice
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s->type = COMEDI_SUBD_AO;
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s->subdev_flags = SDF_WRITABLE;
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s->n_chan = thisboard->ao_nchan;
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s->maxdata = 1 << thisboard->ao_bits;
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s->range_table = &range_unknown; //ranges are hardware settable, but not software readable.
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s->insn_write = &cb_pcimdas_ao_winsn;
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s->insn_read = &cb_pcimdas_ao_rinsn;
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s = dev->subdevices + 2;
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/* digital i/o subdevice */
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if (thisboard->has_dio) {
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subdev_8255_init(dev, s, NULL, devpriv->BADR4);
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} else {
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s->type = COMEDI_SUBD_UNUSED;
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}
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printk("attached\n");
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return 1;
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}
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/*
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* _detach is called to deconfigure a device. It should deallocate
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* resources.
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* This function is also called when _attach() fails, so it should be
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* careful not to release resources that were not necessarily
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* allocated by _attach(). dev->private and dev->subdevices are
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* deallocated automatically by the core.
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*/
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static int cb_pcimdas_detach(comedi_device * dev)
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{
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#ifdef CBPCIMDAS_DEBUG
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if (devpriv) {
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printk("devpriv->BADR0 = 0x%lx\n", devpriv->BADR0);
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printk("devpriv->BADR1 = 0x%lx\n", devpriv->BADR1);
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printk("devpriv->BADR2 = 0x%lx\n", devpriv->BADR2);
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printk("devpriv->BADR3 = 0x%lx\n", devpriv->BADR3);
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printk("devpriv->BADR4 = 0x%lx\n", devpriv->BADR4);
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}
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#endif
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printk("comedi%d: cb_pcimdas: remove\n", dev->minor);
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if (dev->irq)
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comedi_free_irq(dev->irq, dev);
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if (devpriv) {
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if (devpriv->pci_dev) {
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if (devpriv->BADR0) {
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comedi_pci_disable(devpriv->pci_dev);
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}
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pci_dev_put(devpriv->pci_dev);
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}
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}
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return 0;
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}
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/*
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* "instructions" read/write data in "one-shot" or "software-triggered"
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* mode.
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*/
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static int cb_pcimdas_ai_rinsn(comedi_device * dev, comedi_subdevice * s,
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comedi_insn * insn, lsampl_t * data)
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{
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int n, i;
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unsigned int d;
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unsigned int busy;
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int chan = CR_CHAN(insn->chanspec);
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unsigned short chanlims;
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int maxchans;
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// only support sw initiated reads from a single channel
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//check channel number
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if ((inb(devpriv->BADR3 + 2) & 0x20) == 0) //differential mode
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maxchans = thisboard->ai_diff_chans;
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else
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maxchans = thisboard->ai_se_chans;
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if (chan > (maxchans - 1))
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return -ETIMEDOUT; //*** Wrong error code. Fixme.
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//configure for sw initiated read
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d = inb(devpriv->BADR3 + 5);
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if ((d & 0x03) > 0) { //only reset if needed.
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d = d & 0xfd;
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outb(d, devpriv->BADR3 + 5);
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}
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outb(0x01, devpriv->BADR3 + 6); //set bursting off, conversions on
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outb(0x00, devpriv->BADR3 + 7); //set range to 10V. UP/BP is controlled by a switch on the board
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// write channel limits to multiplexer, set Low (bits 0-3) and High (bits 4-7) channels to chan.
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chanlims = chan | (chan << 4);
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outb(chanlims, devpriv->BADR3 + 0);
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/* convert n samples */
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for (n = 0; n < insn->n; n++) {
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/* trigger conversion */
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outw(0, devpriv->BADR2 + 0);
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#define TIMEOUT 1000 //typically takes 5 loops on a lightly loaded Pentium 100MHz,
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//this is likely to be 100 loops on a 2GHz machine, so set 1000 as the limit.
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/* wait for conversion to end */
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for (i = 0; i < TIMEOUT; i++) {
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busy = inb(devpriv->BADR3 + 2) & 0x80;
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if (!busy)
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break;
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}
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if (i == TIMEOUT) {
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printk("timeout\n");
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return -ETIMEDOUT;
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}
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/* read data */
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d = inw(devpriv->BADR2 + 0);
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/* mangle the data as necessary */
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//d ^= 1<<(thisboard->ai_bits-1); // 16 bit data from ADC, so no mangle needed.
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data[n] = d;
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}
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/* return the number of samples read/written */
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return n;
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}
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static int cb_pcimdas_ao_winsn(comedi_device * dev, comedi_subdevice * s,
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comedi_insn * insn, lsampl_t * data)
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{
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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, devpriv->BADR2 + DAC0_OFFSET);
|
||||
break;
|
||||
case 1:
|
||||
outw(data[i] & 0x0FFF, devpriv->BADR2 + 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(comedi_device * dev, comedi_subdevice * s,
|
||||
comedi_insn * insn, lsampl_t * data)
|
||||
{
|
||||
int i;
|
||||
int chan = CR_CHAN(insn->chanspec);
|
||||
|
||||
for (i = 0; i < insn->n; i++)
|
||||
data[i] = devpriv->ao_readback[chan];
|
||||
|
||||
return i;
|
||||
}
|
||||
|
||||
/*
|
||||
* A convenient macro that defines init_module() and cleanup_module(),
|
||||
* as necessary.
|
||||
*/
|
||||
COMEDI_PCI_INITCLEANUP(driver_cb_pcimdas, cb_pcimdas_pci_table);
|
||||
Reference in New Issue
Block a user