| /* |
| 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 "../comedidev.h" |
| |
| #include <linux/delay.h> |
| #include <linux/interrupt.h> |
| |
| #include "comedi_pci.h" |
| #include "plx9052.h" |
| #include "8255.h" |
| |
| /* #define CBPCIMDAS_DEBUG */ |
| #undef CBPCIMDAS_DEBUG |
| |
| #define PCI_VENDOR_ID_COMPUTERBOARDS 0x1307 |
| |
| /* Registers for the PCIM-DAS1602/16 */ |
| |
| /* sizes of io regions (bytes) */ |
| #define BADR0_SIZE 2 /* ?? */ |
| #define BADR1_SIZE 4 |
| #define BADR2_SIZE 6 |
| #define BADR3_SIZE 16 |
| #define BADR4_SIZE 4 |
| |
| /* 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 |
| |
| /* Board description */ |
| struct cb_pcimdas_board { |
| const char *name; |
| unsigned short device_id; |
| int ai_se_chans; /* Inputs in single-ended mode */ |
| int ai_diff_chans; /* Inputs in differential mode */ |
| int ai_bits; /* analog input resolution */ |
| int ai_speed; /* fastest conversion period in ns */ |
| int ao_nchan; /* number of analog out channels */ |
| int ao_bits; /* analogue output resolution */ |
| int has_ao_fifo; /* analog output has fifo */ |
| int ao_scan_speed; /* analog output speed for 1602 series (for a scan, not conversion) */ |
| int fifo_size; /* number of samples fifo can hold */ |
| int dio_bits; /* number of dio bits */ |
| int has_dio; /* has DIO */ |
| const struct comedi_lrange *ranges; |
| }; |
| |
| static const struct cb_pcimdas_board cb_pcimdas_boards[] = { |
| { |
| .name = "PCIM-DAS1602/16", |
| .device_id = 0x56, |
| .ai_se_chans = 16, |
| .ai_diff_chans = 8, |
| .ai_bits = 16, |
| .ai_speed = 10000, /* ?? */ |
| .ao_nchan = 2, |
| .ao_bits = 12, |
| .has_ao_fifo = 0, /* ?? */ |
| .ao_scan_speed = 10000, |
| /* ?? */ |
| .fifo_size = 1024, |
| .dio_bits = 24, |
| .has_dio = 1, |
| /* .ranges = &cb_pcimdas_ranges, */ |
| }, |
| }; |
| |
| /* This is used by modprobe to translate PCI IDs to drivers. Should |
| * only be used for PCI and ISA-PnP devices */ |
| static DEFINE_PCI_DEVICE_TABLE(cb_pcimdas_pci_table) = { |
| { PCI_DEVICE(PCI_VENDOR_ID_COMPUTERBOARDS, 0x0056) }, |
| { 0 } |
| }; |
| |
| MODULE_DEVICE_TABLE(pci, cb_pcimdas_pci_table); |
| |
| #define N_BOARDS 1 /* Max number of boards supported */ |
| |
| /* |
| * Useful for shorthand access to the particular board structure |
| */ |
| #define thisboard ((const struct cb_pcimdas_board *)dev->board_ptr) |
| |
| /* 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 { |
| int data; |
| |
| /* would be useful for a PCI device */ |
| struct pci_dev *pci_dev; |
| |
| /* base addresses */ |
| unsigned long BADR0; |
| unsigned long BADR1; |
| unsigned long BADR2; |
| unsigned long BADR3; |
| unsigned long BADR4; |
| |
| /* Used for AO readback */ |
| unsigned int ao_readback[2]; |
| |
| /* Used for DIO */ |
| unsigned short int port_a; /* copy of BADR4+0 */ |
| unsigned short int port_b; /* copy of BADR4+1 */ |
| unsigned short int port_c; /* copy of BADR4+2 */ |
| unsigned short int dio_mode; /* copy of BADR4+3 */ |
| |
| }; |
| |
| /* |
| * most drivers define the following macro to make it easy to |
| * access the private structure. |
| */ |
| #define devpriv ((struct cb_pcimdas_private *)dev->private) |
| |
| /* |
| * The struct comedi_driver structure tells the Comedi core module |
| * which functions to call to configure/deconfigure (attach/detach) |
| * the board, and also about the kernel module that contains |
| * the device code. |
| */ |
| static int cb_pcimdas_attach(struct comedi_device *dev, |
| struct comedi_devconfig *it); |
| static int cb_pcimdas_detach(struct comedi_device *dev); |
| static struct comedi_driver driver_cb_pcimdas = { |
| .driver_name = "cb_pcimdas", |
| .module = THIS_MODULE, |
| .attach = cb_pcimdas_attach, |
| .detach = cb_pcimdas_detach, |
| }; |
| |
| static int cb_pcimdas_ai_rinsn(struct comedi_device *dev, |
| struct comedi_subdevice *s, |
| struct comedi_insn *insn, unsigned int *data); |
| static int cb_pcimdas_ao_winsn(struct comedi_device *dev, |
| struct comedi_subdevice *s, |
| struct comedi_insn *insn, unsigned int *data); |
| static int cb_pcimdas_ao_rinsn(struct comedi_device *dev, |
| struct comedi_subdevice *s, |
| struct comedi_insn *insn, unsigned int *data); |
| |
| /* |
| * Attach is called by the Comedi core to configure the driver |
| * for a particular board. If you specified a board_name array |
| * in the driver structure, dev->board_ptr contains that |
| * address. |
| */ |
| static int cb_pcimdas_attach(struct comedi_device *dev, |
| struct comedi_devconfig *it) |
| { |
| struct comedi_subdevice *s; |
| struct pci_dev *pcidev = NULL; |
| int index; |
| /* int i; */ |
| |
| printk("comedi%d: cb_pcimdas: ", dev->minor); |
| |
| /* |
| * Allocate the private structure area. |
| */ |
| if (alloc_private(dev, sizeof(struct cb_pcimdas_private)) < 0) |
| return -ENOMEM; |
| |
| /* |
| * Probe the device to determine what device in the series it is. |
| */ |
| printk("\n"); |
| |
| for_each_pci_dev(pcidev) { |
| /* is it not a computer boards card? */ |
| if (pcidev->vendor != PCI_VENDOR_ID_COMPUTERBOARDS) |
| continue; |
| /* loop through cards supported by this driver */ |
| for (index = 0; index < N_BOARDS; index++) { |
| if (cb_pcimdas_boards[index].device_id != |
| pcidev->device) |
| continue; |
| /* was a particular bus/slot requested? */ |
| if (it->options[0] || it->options[1]) { |
| /* are we on the wrong bus/slot? */ |
| if (pcidev->bus->number != it->options[0] || |
| PCI_SLOT(pcidev->devfn) != it->options[1]) { |
| continue; |
| } |
| } |
| devpriv->pci_dev = pcidev; |
| dev->board_ptr = cb_pcimdas_boards + index; |
| goto found; |
| } |
| } |
| |
| printk("No supported ComputerBoards/MeasurementComputing card found on " |
| "requested position\n"); |
| return -EIO; |
| |
| found: |
| |
| printk("Found %s on bus %i, slot %i\n", cb_pcimdas_boards[index].name, |
| pcidev->bus->number, PCI_SLOT(pcidev->devfn)); |
| |
| /* Warn about non-tested features */ |
| switch (thisboard->device_id) { |
| case 0x56: |
| break; |
| default: |
| printk("THIS CARD IS UNSUPPORTED.\n" |
| "PLEASE REPORT USAGE TO <mocelet@sucs.org>\n"); |
| }; |
| |
| if (comedi_pci_enable(pcidev, "cb_pcimdas")) { |
| printk(" Failed to enable PCI device and request regions\n"); |
| return -EIO; |
| } |
| |
| devpriv->BADR0 = pci_resource_start(devpriv->pci_dev, 0); |
| devpriv->BADR1 = pci_resource_start(devpriv->pci_dev, 1); |
| devpriv->BADR2 = pci_resource_start(devpriv->pci_dev, 2); |
| devpriv->BADR3 = pci_resource_start(devpriv->pci_dev, 3); |
| devpriv->BADR4 = pci_resource_start(devpriv->pci_dev, 4); |
| |
| #ifdef CBPCIMDAS_DEBUG |
| printk("devpriv->BADR0 = 0x%lx\n", devpriv->BADR0); |
| printk("devpriv->BADR1 = 0x%lx\n", devpriv->BADR1); |
| printk("devpriv->BADR2 = 0x%lx\n", devpriv->BADR2); |
| printk("devpriv->BADR3 = 0x%lx\n", devpriv->BADR3); |
| printk("devpriv->BADR4 = 0x%lx\n", devpriv->BADR4); |
| #endif |
| |
| /* Dont support IRQ yet */ |
| /* get irq */ |
| /* if(request_irq(devpriv->pci_dev->irq, cb_pcimdas_interrupt, IRQF_SHARED, "cb_pcimdas", dev )) */ |
| /* { */ |
| /* printk(" unable to allocate irq %u\n", devpriv->pci_dev->irq); */ |
| /* return -EINVAL; */ |
| /* } */ |
| /* dev->irq = devpriv->pci_dev->irq; */ |
| |
| /* Initialize dev->board_name */ |
| dev->board_name = thisboard->name; |
| |
| /* |
| * Allocate the subdevice structures. alloc_subdevice() is a |
| * convenient macro defined in comedidev.h. |
| */ |
| if (alloc_subdevices(dev, 3) < 0) |
| return -ENOMEM; |
| |
| 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 = thisboard->ai_se_chans; |
| s->maxdata = (1 << thisboard->ai_bits) - 1; |
| 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 = thisboard->ao_nchan; |
| s->maxdata = 1 << thisboard->ao_bits; |
| s->range_table = &range_unknown; /* ranges are hardware settable, but not software readable. */ |
| s->insn_write = &cb_pcimdas_ao_winsn; |
| s->insn_read = &cb_pcimdas_ao_rinsn; |
| |
| s = dev->subdevices + 2; |
| /* digital i/o subdevice */ |
| if (thisboard->has_dio) |
| subdev_8255_init(dev, s, NULL, devpriv->BADR4); |
| else |
| s->type = COMEDI_SUBD_UNUSED; |
| |
| printk("attached\n"); |
| |
| return 1; |
| } |
| |
| /* |
| * _detach is called to deconfigure a device. It should deallocate |
| * resources. |
| * This function is also called when _attach() fails, so it should be |
| * careful not to release resources that were not necessarily |
| * allocated by _attach(). dev->private and dev->subdevices are |
| * deallocated automatically by the core. |
| */ |
| static int cb_pcimdas_detach(struct comedi_device *dev) |
| { |
| #ifdef CBPCIMDAS_DEBUG |
| if (devpriv) { |
| printk("devpriv->BADR0 = 0x%lx\n", devpriv->BADR0); |
| printk("devpriv->BADR1 = 0x%lx\n", devpriv->BADR1); |
| printk("devpriv->BADR2 = 0x%lx\n", devpriv->BADR2); |
| printk("devpriv->BADR3 = 0x%lx\n", devpriv->BADR3); |
| printk("devpriv->BADR4 = 0x%lx\n", devpriv->BADR4); |
| } |
| #endif |
| printk("comedi%d: cb_pcimdas: remove\n", dev->minor); |
| if (dev->irq) |
| free_irq(dev->irq, dev); |
| if (devpriv) { |
| if (devpriv->pci_dev) { |
| if (devpriv->BADR0) |
| comedi_pci_disable(devpriv->pci_dev); |
| pci_dev_put(devpriv->pci_dev); |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * "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) |
| { |
| 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 = thisboard->ai_diff_chans; |
| else |
| maxchans = thisboard->ai_se_chans; |
| |
| 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, devpriv->BADR2 + 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 */ |
| d = inw(devpriv->BADR2 + 0); |
| |
| /* mangle the data as necessary */ |
| /* d ^= 1<<(thisboard->ai_bits-1); // 16 bit data from ADC, so no mangle needed. */ |
| |
| data[n] = d; |
| } |
| |
| /* 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) |
| { |
| 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(struct comedi_device *dev, |
| struct comedi_subdevice *s, |
| struct comedi_insn *insn, unsigned int *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. |
| */ |
| static int __devinit driver_cb_pcimdas_pci_probe(struct pci_dev *dev, |
| const struct pci_device_id |
| *ent) |
| { |
| return comedi_pci_auto_config(dev, driver_cb_pcimdas.driver_name); |
| } |
| |
| static void __devexit driver_cb_pcimdas_pci_remove(struct pci_dev *dev) |
| { |
| comedi_pci_auto_unconfig(dev); |
| } |
| |
| static struct pci_driver driver_cb_pcimdas_pci_driver = { |
| .id_table = cb_pcimdas_pci_table, |
| .probe = &driver_cb_pcimdas_pci_probe, |
| .remove = __devexit_p(&driver_cb_pcimdas_pci_remove) |
| }; |
| |
| static int __init driver_cb_pcimdas_init_module(void) |
| { |
| int retval; |
| |
| retval = comedi_driver_register(&driver_cb_pcimdas); |
| if (retval < 0) |
| return retval; |
| |
| driver_cb_pcimdas_pci_driver.name = |
| (char *)driver_cb_pcimdas.driver_name; |
| return pci_register_driver(&driver_cb_pcimdas_pci_driver); |
| } |
| |
| static void __exit driver_cb_pcimdas_cleanup_module(void) |
| { |
| pci_unregister_driver(&driver_cb_pcimdas_pci_driver); |
| comedi_driver_unregister(&driver_cb_pcimdas); |
| } |
| |
| module_init(driver_cb_pcimdas_init_module); |
| module_exit(driver_cb_pcimdas_cleanup_module); |
| |
| MODULE_AUTHOR("Comedi http://www.comedi.org"); |
| MODULE_DESCRIPTION("Comedi low-level driver"); |
| MODULE_LICENSE("GPL"); |