linux/drivers/staging/comedi/drivers/ni_670x.c
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   1/*
   2    comedi/drivers/ni_670x.c
   3    Hardware driver for NI 670x devices
   4
   5    COMEDI - Linux Control and Measurement Device Interface
   6    Copyright (C) 1997-2001 David A. Schleef <ds@schleef.org>
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17*/
  18/*
  19Driver: ni_670x
  20Description: National Instruments 670x
  21Author: Bart Joris <bjoris@advalvas.be>
  22Updated: Wed, 11 Dec 2002 18:25:35 -0800
  23Devices: [National Instruments] PCI-6703 (ni_670x), PCI-6704
  24Status: unknown
  25
  26Commands are not supported.
  27*/
  28
  29/*
  30        Bart Joris <bjoris@advalvas.be> Last updated on 20/08/2001
  31
  32        Manuals:
  33
  34        322110a.pdf     PCI/PXI-6704 User Manual
  35        322110b.pdf     PCI/PXI-6703/6704 User Manual
  36
  37*/
  38
  39#include <linux/module.h>
  40#include <linux/pci.h>
  41#include <linux/interrupt.h>
  42#include <linux/slab.h>
  43
  44#include "../comedidev.h"
  45
  46#define AO_VALUE_OFFSET                 0x00
  47#define AO_CHAN_OFFSET                  0x0c
  48#define AO_STATUS_OFFSET                0x10
  49#define AO_CONTROL_OFFSET               0x10
  50#define DIO_PORT0_DIR_OFFSET    0x20
  51#define DIO_PORT0_DATA_OFFSET   0x24
  52#define DIO_PORT1_DIR_OFFSET    0x28
  53#define DIO_PORT1_DATA_OFFSET   0x2c
  54#define MISC_STATUS_OFFSET              0x14
  55#define MISC_CONTROL_OFFSET             0x14
  56
  57enum ni_670x_boardid {
  58        BOARD_PCI6703,
  59        BOARD_PXI6704,
  60        BOARD_PCI6704,
  61};
  62
  63struct ni_670x_board {
  64        const char *name;
  65        unsigned short ao_chans;
  66};
  67
  68static const struct ni_670x_board ni_670x_boards[] = {
  69        [BOARD_PCI6703] = {
  70                .name           = "PCI-6703",
  71                .ao_chans       = 16,
  72        },
  73        [BOARD_PXI6704] = {
  74                .name           = "PXI-6704",
  75                .ao_chans       = 32,
  76        },
  77        [BOARD_PCI6704] = {
  78                .name           = "PCI-6704",
  79                .ao_chans       = 32,
  80        },
  81};
  82
  83struct ni_670x_private {
  84        int boardtype;
  85        int dio;
  86};
  87
  88static int ni_670x_ao_insn_write(struct comedi_device *dev,
  89                                 struct comedi_subdevice *s,
  90                                 struct comedi_insn *insn,
  91                                 unsigned int *data)
  92{
  93        unsigned int chan = CR_CHAN(insn->chanspec);
  94        unsigned int val = s->readback[chan];
  95        int i;
  96
  97        /*
  98         * Channel number mapping:
  99         *
 100         * NI 6703/ NI 6704 | NI 6704 Only
 101         * -------------------------------
 102         * vch(0)  :  0     | ich(16) :  1
 103         * vch(1)  :  2     | ich(17) :  3
 104         * ...              | ...
 105         * vch(15) : 30     | ich(31) : 31
 106         */
 107        for (i = 0; i < insn->n; i++) {
 108                val = data[i];
 109                /* First write in channel register which channel to use */
 110                writel(((chan & 15) << 1) | ((chan & 16) >> 4),
 111                       dev->mmio + AO_CHAN_OFFSET);
 112                /* write channel value */
 113                writel(val, dev->mmio + AO_VALUE_OFFSET);
 114        }
 115        s->readback[chan] = val;
 116
 117        return insn->n;
 118}
 119
 120static int ni_670x_dio_insn_bits(struct comedi_device *dev,
 121                                 struct comedi_subdevice *s,
 122                                 struct comedi_insn *insn,
 123                                 unsigned int *data)
 124{
 125        if (comedi_dio_update_state(s, data))
 126                writel(s->state, dev->mmio + DIO_PORT0_DATA_OFFSET);
 127
 128        data[1] = readl(dev->mmio + DIO_PORT0_DATA_OFFSET);
 129
 130        return insn->n;
 131}
 132
 133static int ni_670x_dio_insn_config(struct comedi_device *dev,
 134                                   struct comedi_subdevice *s,
 135                                   struct comedi_insn *insn,
 136                                   unsigned int *data)
 137{
 138        int ret;
 139
 140        ret = comedi_dio_insn_config(dev, s, insn, data, 0);
 141        if (ret)
 142                return ret;
 143
 144        writel(s->io_bits, dev->mmio + DIO_PORT0_DIR_OFFSET);
 145
 146        return insn->n;
 147}
 148
 149/* ripped from mite.h and mite_setup2() to avoid mite dependancy */
 150#define MITE_IODWBSR    0xc0     /* IO Device Window Base Size Register */
 151#define WENAB           (1 << 7) /* window enable */
 152
 153static int ni_670x_mite_init(struct pci_dev *pcidev)
 154{
 155        void __iomem *mite_base;
 156        u32 main_phys_addr;
 157
 158        /* ioremap the MITE registers (BAR 0) temporarily */
 159        mite_base = pci_ioremap_bar(pcidev, 0);
 160        if (!mite_base)
 161                return -ENOMEM;
 162
 163        /* set data window to main registers (BAR 1) */
 164        main_phys_addr = pci_resource_start(pcidev, 1);
 165        writel(main_phys_addr | WENAB, mite_base + MITE_IODWBSR);
 166
 167        /* finished with MITE registers */
 168        iounmap(mite_base);
 169        return 0;
 170}
 171
 172static int ni_670x_auto_attach(struct comedi_device *dev,
 173                               unsigned long context)
 174{
 175        struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 176        const struct ni_670x_board *thisboard = NULL;
 177        struct ni_670x_private *devpriv;
 178        struct comedi_subdevice *s;
 179        int ret;
 180        int i;
 181
 182        if (context < ARRAY_SIZE(ni_670x_boards))
 183                thisboard = &ni_670x_boards[context];
 184        if (!thisboard)
 185                return -ENODEV;
 186        dev->board_ptr = thisboard;
 187        dev->board_name = thisboard->name;
 188
 189        ret = comedi_pci_enable(dev);
 190        if (ret)
 191                return ret;
 192
 193        devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
 194        if (!devpriv)
 195                return -ENOMEM;
 196
 197        ret = ni_670x_mite_init(pcidev);
 198        if (ret)
 199                return ret;
 200
 201        dev->mmio = pci_ioremap_bar(pcidev, 1);
 202        if (!dev->mmio)
 203                return -ENOMEM;
 204
 205        ret = comedi_alloc_subdevices(dev, 2);
 206        if (ret)
 207                return ret;
 208
 209        s = &dev->subdevices[0];
 210        /* analog output subdevice */
 211        s->type = COMEDI_SUBD_AO;
 212        s->subdev_flags = SDF_WRITABLE;
 213        s->n_chan = thisboard->ao_chans;
 214        s->maxdata = 0xffff;
 215        if (s->n_chan == 32) {
 216                const struct comedi_lrange **range_table_list;
 217
 218                range_table_list = kmalloc(sizeof(struct comedi_lrange *) * 32,
 219                                           GFP_KERNEL);
 220                if (!range_table_list)
 221                        return -ENOMEM;
 222                s->range_table_list = range_table_list;
 223                for (i = 0; i < 16; i++) {
 224                        range_table_list[i] = &range_bipolar10;
 225                        range_table_list[16 + i] = &range_0_20mA;
 226                }
 227        } else {
 228                s->range_table = &range_bipolar10;
 229        }
 230        s->insn_write = ni_670x_ao_insn_write;
 231
 232        ret = comedi_alloc_subdev_readback(s);
 233        if (ret)
 234                return ret;
 235
 236        s = &dev->subdevices[1];
 237        /* digital i/o subdevice */
 238        s->type = COMEDI_SUBD_DIO;
 239        s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
 240        s->n_chan = 8;
 241        s->maxdata = 1;
 242        s->range_table = &range_digital;
 243        s->insn_bits = ni_670x_dio_insn_bits;
 244        s->insn_config = ni_670x_dio_insn_config;
 245
 246        /* Config of misc registers */
 247        writel(0x10, dev->mmio + MISC_CONTROL_OFFSET);
 248        /* Config of ao registers */
 249        writel(0x00, dev->mmio + AO_CONTROL_OFFSET);
 250
 251        return 0;
 252}
 253
 254static void ni_670x_detach(struct comedi_device *dev)
 255{
 256        struct comedi_subdevice *s;
 257
 258        comedi_pci_detach(dev);
 259        if (dev->n_subdevices) {
 260                s = &dev->subdevices[0];
 261                if (s)
 262                        kfree(s->range_table_list);
 263        }
 264}
 265
 266static struct comedi_driver ni_670x_driver = {
 267        .driver_name    = "ni_670x",
 268        .module         = THIS_MODULE,
 269        .auto_attach    = ni_670x_auto_attach,
 270        .detach         = ni_670x_detach,
 271};
 272
 273static int ni_670x_pci_probe(struct pci_dev *dev,
 274                             const struct pci_device_id *id)
 275{
 276        return comedi_pci_auto_config(dev, &ni_670x_driver, id->driver_data);
 277}
 278
 279static const struct pci_device_id ni_670x_pci_table[] = {
 280        { PCI_VDEVICE(NI, 0x1290), BOARD_PCI6704 },
 281        { PCI_VDEVICE(NI, 0x1920), BOARD_PXI6704 },
 282        { PCI_VDEVICE(NI, 0x2c90), BOARD_PCI6703 },
 283        { 0 }
 284};
 285MODULE_DEVICE_TABLE(pci, ni_670x_pci_table);
 286
 287static struct pci_driver ni_670x_pci_driver = {
 288        .name           = "ni_670x",
 289        .id_table       = ni_670x_pci_table,
 290        .probe          = ni_670x_pci_probe,
 291        .remove         = comedi_pci_auto_unconfig,
 292};
 293module_comedi_pci_driver(ni_670x_driver, ni_670x_pci_driver);
 294
 295MODULE_AUTHOR("Comedi http://www.comedi.org");
 296MODULE_DESCRIPTION("Comedi low-level driver");
 297MODULE_LICENSE("GPL");
 298
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