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