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/interrupt.h>
  41#include <linux/slab.h>
  42
  43#include "../comedi_pci.h"
  44
  45#define AO_VALUE_OFFSET                 0x00
  46#define AO_CHAN_OFFSET                  0x0c
  47#define AO_STATUS_OFFSET                0x10
  48#define AO_CONTROL_OFFSET               0x10
  49#define DIO_PORT0_DIR_OFFSET    0x20
  50#define DIO_PORT0_DATA_OFFSET   0x24
  51#define DIO_PORT1_DIR_OFFSET    0x28
  52#define DIO_PORT1_DATA_OFFSET   0x2c
  53#define MISC_STATUS_OFFSET              0x14
  54#define MISC_CONTROL_OFFSET             0x14
  55
  56enum ni_670x_boardid {
  57        BOARD_PCI6703,
  58        BOARD_PXI6704,
  59        BOARD_PCI6704,
  60};
  61
  62struct ni_670x_board {
  63        const char *name;
  64        unsigned short ao_chans;
  65};
  66
  67static const struct ni_670x_board ni_670x_boards[] = {
  68        [BOARD_PCI6703] = {
  69                .name           = "PCI-6703",
  70                .ao_chans       = 16,
  71        },
  72        [BOARD_PXI6704] = {
  73                .name           = "PXI-6704",
  74                .ao_chans       = 32,
  75        },
  76        [BOARD_PCI6704] = {
  77                .name           = "PCI-6704",
  78                .ao_chans       = 32,
  79        },
  80};
  81
  82struct ni_670x_private {
  83        int boardtype;
  84        int dio;
  85};
  86
  87static int ni_670x_ao_insn_write(struct comedi_device *dev,
  88                                 struct comedi_subdevice *s,
  89                                 struct comedi_insn *insn,
  90                                 unsigned int *data)
  91{
  92        unsigned int chan = CR_CHAN(insn->chanspec);
  93        unsigned int val = s->readback[chan];
  94        int i;
  95
  96        /*
  97         * Channel number mapping:
  98         *
  99         * NI 6703/ NI 6704 | NI 6704 Only
 100         * -------------------------------
 101         * vch(0)  :  0     | ich(16) :  1
 102         * vch(1)  :  2     | ich(17) :  3
 103         * ...              | ...
 104         * vch(15) : 30     | ich(31) : 31
 105         */
 106        for (i = 0; i < insn->n; i++) {
 107                val = data[i];
 108                /* First write in channel register which channel to use */
 109                writel(((chan & 15) << 1) | ((chan & 16) >> 4),
 110                       dev->mmio + AO_CHAN_OFFSET);
 111                /* write channel value */
 112                writel(val, dev->mmio + AO_VALUE_OFFSET);
 113        }
 114        s->readback[chan] = val;
 115
 116        return insn->n;
 117}
 118
 119static int ni_670x_dio_insn_bits(struct comedi_device *dev,
 120                                 struct comedi_subdevice *s,
 121                                 struct comedi_insn *insn,
 122                                 unsigned int *data)
 123{
 124        if (comedi_dio_update_state(s, data))
 125                writel(s->state, dev->mmio + DIO_PORT0_DATA_OFFSET);
 126
 127        data[1] = readl(dev->mmio + DIO_PORT0_DATA_OFFSET);
 128
 129        return insn->n;
 130}
 131
 132static int ni_670x_dio_insn_config(struct comedi_device *dev,
 133                                   struct comedi_subdevice *s,
 134                                   struct comedi_insn *insn,
 135                                   unsigned int *data)
 136{
 137        int ret;
 138
 139        ret = comedi_dio_insn_config(dev, s, insn, data, 0);
 140        if (ret)
 141                return ret;
 142
 143        writel(s->io_bits, dev->mmio + DIO_PORT0_DIR_OFFSET);
 144
 145        return insn->n;
 146}
 147
 148/* ripped from mite.h and mite_setup2() to avoid mite dependency */
 149#define MITE_IODWBSR    0xc0     /* IO Device Window Base Size Register */
 150#define WENAB           (1 << 7) /* window enable */
 151
 152static int ni_670x_mite_init(struct pci_dev *pcidev)
 153{
 154        void __iomem *mite_base;
 155        u32 main_phys_addr;
 156
 157        /* ioremap the MITE registers (BAR 0) temporarily */
 158        mite_base = pci_ioremap_bar(pcidev, 0);
 159        if (!mite_base)
 160                return -ENOMEM;
 161
 162        /* set data window to main registers (BAR 1) */
 163        main_phys_addr = pci_resource_start(pcidev, 1);
 164        writel(main_phys_addr | WENAB, mite_base + MITE_IODWBSR);
 165
 166        /* finished with MITE registers */
 167        iounmap(mite_base);
 168        return 0;
 169}
 170
 171static int ni_670x_auto_attach(struct comedi_device *dev,
 172                               unsigned long context)
 173{
 174        struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 175        const struct ni_670x_board *board = NULL;
 176        struct ni_670x_private *devpriv;
 177        struct comedi_subdevice *s;
 178        int ret;
 179        int i;
 180
 181        if (context < ARRAY_SIZE(ni_670x_boards))
 182                board = &ni_670x_boards[context];
 183        if (!board)
 184                return -ENODEV;
 185        dev->board_ptr = board;
 186        dev->board_name = board->name;
 187
 188        ret = comedi_pci_enable(dev);
 189        if (ret)
 190                return ret;
 191
 192        devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
 193        if (!devpriv)
 194                return -ENOMEM;
 195
 196        ret = ni_670x_mite_init(pcidev);
 197        if (ret)
 198                return ret;
 199
 200        dev->mmio = pci_ioremap_bar(pcidev, 1);
 201        if (!dev->mmio)
 202                return -ENOMEM;
 203
 204        ret = comedi_alloc_subdevices(dev, 2);
 205        if (ret)
 206                return ret;
 207
 208        s = &dev->subdevices[0];
 209        /* analog output subdevice */
 210        s->type = COMEDI_SUBD_AO;
 211        s->subdev_flags = SDF_WRITABLE;
 212        s->n_chan = board->ao_chans;
 213        s->maxdata = 0xffff;
 214        if (s->n_chan == 32) {
 215                const struct comedi_lrange **range_table_list;
 216
 217                range_table_list = kmalloc_array(32,
 218                                                 sizeof(struct comedi_lrange *),
 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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