linux/drivers/comedi/drivers/ni_670x.c
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   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Comedi 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
   9/*
  10 * Driver: ni_670x
  11 * Description: National Instruments 670x
  12 * Author: Bart Joris <bjoris@advalvas.be>
  13 * Updated: Wed, 11 Dec 2002 18:25:35 -0800
  14 * Devices: [National Instruments] PCI-6703 (ni_670x), PCI-6704
  15 * Status: unknown
  16 *
  17 * Commands are not supported.
  18 *
  19 * Manuals:
  20 *   322110a.pdf        PCI/PXI-6704 User Manual
  21 *   322110b.pdf        PCI/PXI-6703/6704 User Manual
  22 */
  23
  24#include <linux/module.h>
  25#include <linux/interrupt.h>
  26#include <linux/slab.h>
  27
  28#include "../comedi_pci.h"
  29
  30#define AO_VALUE_OFFSET                 0x00
  31#define AO_CHAN_OFFSET                  0x0c
  32#define AO_STATUS_OFFSET                0x10
  33#define AO_CONTROL_OFFSET               0x10
  34#define DIO_PORT0_DIR_OFFSET    0x20
  35#define DIO_PORT0_DATA_OFFSET   0x24
  36#define DIO_PORT1_DIR_OFFSET    0x28
  37#define DIO_PORT1_DATA_OFFSET   0x2c
  38#define MISC_STATUS_OFFSET              0x14
  39#define MISC_CONTROL_OFFSET             0x14
  40
  41enum ni_670x_boardid {
  42        BOARD_PCI6703,
  43        BOARD_PXI6704,
  44        BOARD_PCI6704,
  45};
  46
  47struct ni_670x_board {
  48        const char *name;
  49        unsigned short ao_chans;
  50};
  51
  52static const struct ni_670x_board ni_670x_boards[] = {
  53        [BOARD_PCI6703] = {
  54                .name           = "PCI-6703",
  55                .ao_chans       = 16,
  56        },
  57        [BOARD_PXI6704] = {
  58                .name           = "PXI-6704",
  59                .ao_chans       = 32,
  60        },
  61        [BOARD_PCI6704] = {
  62                .name           = "PCI-6704",
  63                .ao_chans       = 32,
  64        },
  65};
  66
  67struct ni_670x_private {
  68        int boardtype;
  69        int dio;
  70};
  71
  72static int ni_670x_ao_insn_write(struct comedi_device *dev,
  73                                 struct comedi_subdevice *s,
  74                                 struct comedi_insn *insn,
  75                                 unsigned int *data)
  76{
  77        unsigned int chan = CR_CHAN(insn->chanspec);
  78        unsigned int val = s->readback[chan];
  79        int i;
  80
  81        /*
  82         * Channel number mapping:
  83         *
  84         * NI 6703/ NI 6704 | NI 6704 Only
  85         * -------------------------------
  86         * vch(0)  :  0     | ich(16) :  1
  87         * vch(1)  :  2     | ich(17) :  3
  88         * ...              | ...
  89         * vch(15) : 30     | ich(31) : 31
  90         */
  91        for (i = 0; i < insn->n; i++) {
  92                val = data[i];
  93                /* First write in channel register which channel to use */
  94                writel(((chan & 15) << 1) | ((chan & 16) >> 4),
  95                       dev->mmio + AO_CHAN_OFFSET);
  96                /* write channel value */
  97                writel(val, dev->mmio + AO_VALUE_OFFSET);
  98        }
  99        s->readback[chan] = val;
 100
 101        return insn->n;
 102}
 103
 104static int ni_670x_dio_insn_bits(struct comedi_device *dev,
 105                                 struct comedi_subdevice *s,
 106                                 struct comedi_insn *insn,
 107                                 unsigned int *data)
 108{
 109        if (comedi_dio_update_state(s, data))
 110                writel(s->state, dev->mmio + DIO_PORT0_DATA_OFFSET);
 111
 112        data[1] = readl(dev->mmio + DIO_PORT0_DATA_OFFSET);
 113
 114        return insn->n;
 115}
 116
 117static int ni_670x_dio_insn_config(struct comedi_device *dev,
 118                                   struct comedi_subdevice *s,
 119                                   struct comedi_insn *insn,
 120                                   unsigned int *data)
 121{
 122        int ret;
 123
 124        ret = comedi_dio_insn_config(dev, s, insn, data, 0);
 125        if (ret)
 126                return ret;
 127
 128        writel(s->io_bits, dev->mmio + DIO_PORT0_DIR_OFFSET);
 129
 130        return insn->n;
 131}
 132
 133/* ripped from mite.h and mite_setup2() to avoid mite dependency */
 134#define MITE_IODWBSR    0xc0     /* IO Device Window Base Size Register */
 135#define WENAB           BIT(7) /* window enable */
 136
 137static int ni_670x_mite_init(struct pci_dev *pcidev)
 138{
 139        void __iomem *mite_base;
 140        u32 main_phys_addr;
 141
 142        /* ioremap the MITE registers (BAR 0) temporarily */
 143        mite_base = pci_ioremap_bar(pcidev, 0);
 144        if (!mite_base)
 145                return -ENOMEM;
 146
 147        /* set data window to main registers (BAR 1) */
 148        main_phys_addr = pci_resource_start(pcidev, 1);
 149        writel(main_phys_addr | WENAB, mite_base + MITE_IODWBSR);
 150
 151        /* finished with MITE registers */
 152        iounmap(mite_base);
 153        return 0;
 154}
 155
 156static int ni_670x_auto_attach(struct comedi_device *dev,
 157                               unsigned long context)
 158{
 159        struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 160        const struct ni_670x_board *board = NULL;
 161        struct ni_670x_private *devpriv;
 162        struct comedi_subdevice *s;
 163        int ret;
 164        int i;
 165
 166        if (context < ARRAY_SIZE(ni_670x_boards))
 167                board = &ni_670x_boards[context];
 168        if (!board)
 169                return -ENODEV;
 170        dev->board_ptr = board;
 171        dev->board_name = board->name;
 172
 173        ret = comedi_pci_enable(dev);
 174        if (ret)
 175                return ret;
 176
 177        devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
 178        if (!devpriv)
 179                return -ENOMEM;
 180
 181        ret = ni_670x_mite_init(pcidev);
 182        if (ret)
 183                return ret;
 184
 185        dev->mmio = pci_ioremap_bar(pcidev, 1);
 186        if (!dev->mmio)
 187                return -ENOMEM;
 188
 189        ret = comedi_alloc_subdevices(dev, 2);
 190        if (ret)
 191                return ret;
 192
 193        s = &dev->subdevices[0];
 194        /* analog output subdevice */
 195        s->type = COMEDI_SUBD_AO;
 196        s->subdev_flags = SDF_WRITABLE;
 197        s->n_chan = board->ao_chans;
 198        s->maxdata = 0xffff;
 199        if (s->n_chan == 32) {
 200                const struct comedi_lrange **range_table_list;
 201
 202                range_table_list = kmalloc_array(32,
 203                                                 sizeof(struct comedi_lrange *),
 204                                                 GFP_KERNEL);
 205                if (!range_table_list)
 206                        return -ENOMEM;
 207                s->range_table_list = range_table_list;
 208                for (i = 0; i < 16; i++) {
 209                        range_table_list[i] = &range_bipolar10;
 210                        range_table_list[16 + i] = &range_0_20mA;
 211                }
 212        } else {
 213                s->range_table = &range_bipolar10;
 214        }
 215        s->insn_write = ni_670x_ao_insn_write;
 216
 217        ret = comedi_alloc_subdev_readback(s);
 218        if (ret)
 219                return ret;
 220
 221        s = &dev->subdevices[1];
 222        /* digital i/o subdevice */
 223        s->type = COMEDI_SUBD_DIO;
 224        s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
 225        s->n_chan = 8;
 226        s->maxdata = 1;
 227        s->range_table = &range_digital;
 228        s->insn_bits = ni_670x_dio_insn_bits;
 229        s->insn_config = ni_670x_dio_insn_config;
 230
 231        /* Config of misc registers */
 232        writel(0x10, dev->mmio + MISC_CONTROL_OFFSET);
 233        /* Config of ao registers */
 234        writel(0x00, dev->mmio + AO_CONTROL_OFFSET);
 235
 236        return 0;
 237}
 238
 239static void ni_670x_detach(struct comedi_device *dev)
 240{
 241        struct comedi_subdevice *s;
 242
 243        comedi_pci_detach(dev);
 244        if (dev->n_subdevices) {
 245                s = &dev->subdevices[0];
 246                if (s)
 247                        kfree(s->range_table_list);
 248        }
 249}
 250
 251static struct comedi_driver ni_670x_driver = {
 252        .driver_name    = "ni_670x",
 253        .module         = THIS_MODULE,
 254        .auto_attach    = ni_670x_auto_attach,
 255        .detach         = ni_670x_detach,
 256};
 257
 258static int ni_670x_pci_probe(struct pci_dev *dev,
 259                             const struct pci_device_id *id)
 260{
 261        return comedi_pci_auto_config(dev, &ni_670x_driver, id->driver_data);
 262}
 263
 264static const struct pci_device_id ni_670x_pci_table[] = {
 265        { PCI_VDEVICE(NI, 0x1290), BOARD_PCI6704 },
 266        { PCI_VDEVICE(NI, 0x1920), BOARD_PXI6704 },
 267        { PCI_VDEVICE(NI, 0x2c90), BOARD_PCI6703 },
 268        { 0 }
 269};
 270MODULE_DEVICE_TABLE(pci, ni_670x_pci_table);
 271
 272static struct pci_driver ni_670x_pci_driver = {
 273        .name           = "ni_670x",
 274        .id_table       = ni_670x_pci_table,
 275        .probe          = ni_670x_pci_probe,
 276        .remove         = comedi_pci_auto_unconfig,
 277};
 278module_comedi_pci_driver(ni_670x_driver, ni_670x_pci_driver);
 279
 280MODULE_AUTHOR("Comedi https://www.comedi.org");
 281MODULE_DESCRIPTION("Comedi low-level driver");
 282MODULE_LICENSE("GPL");
 283