drivers/staging/comedi/drivers/ni_670x.c

   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 /*
  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
  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
  56 enum ni_670x_boardid {
  57         BOARD_PCI6703,
  58         BOARD_PXI6704,
  59         BOARD_PCI6704,
  60 };
  61
  62 struct ni_670x_board {
  63         const char *name;
  64         unsigned short ao_chans;
  65 };
  66
  67 static 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
  82 struct ni_670x_private {
  83         int boardtype;
  84         int dio;
  85 };
  86
  87 static 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
 119 static 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
 132 static 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
 152 static 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
 171 static 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(sizeof(struct comedi_lrange *) * 32,
 218                                            GFP_KERNEL);
 219                 if (!range_table_list)
 220                         return -ENOMEM;
 221                 s->range_table_list = range_table_list;
 222                 for (i = 0; i < 16; i++) {
 223                         range_table_list[i] = &range_bipolar10;
 224                         range_table_list[16 + i] = &range_0_20mA;
 225                 }
 226         } else {
 227                 s->range_table = &range_bipolar10;
 228         }
 229         s->insn_write = ni_670x_ao_insn_write;
 230
 231         ret = comedi_alloc_subdev_readback(s);
 232         if (ret)
 233                 return ret;
 234
 235         s = &dev->subdevices[1];
 236         /* digital i/o subdevice */
 237         s->type = COMEDI_SUBD_DIO;
 238         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
 239         s->n_chan = 8;
 240         s->maxdata = 1;
 241         s->range_table = &range_digital;
 242         s->insn_bits = ni_670x_dio_insn_bits;
 243         s->insn_config = ni_670x_dio_insn_config;
 244
 245         /* Config of misc registers */
 246         writel(0x10, dev->mmio + MISC_CONTROL_OFFSET);
 247         /* Config of ao registers */
 248         writel(0x00, dev->mmio + AO_CONTROL_OFFSET);
 249
 250         return 0;
 251 }
 252
 253 static void ni_670x_detach(struct comedi_device *dev)
 254 {
 255         struct comedi_subdevice *s;
 256
 257         comedi_pci_detach(dev);
 258         if (dev->n_subdevices) {
 259                 s = &dev->subdevices[0];
 260                 if (s)
 261                         kfree(s->range_table_list);
 262         }
 263 }
 264
 265 static struct comedi_driver ni_670x_driver = {
 266         .driver_name    = "ni_670x",
 267         .module         = THIS_MODULE,
 268         .auto_attach    = ni_670x_auto_attach,
 269         .detach         = ni_670x_detach,
 270 };
 271
 272 static int ni_670x_pci_probe(struct pci_dev *dev,
 273                              const struct pci_device_id *id)
 274 {
 275         return comedi_pci_auto_config(dev, &ni_670x_driver, id->driver_data);
 276 }
 277
 278 static const struct pci_device_id ni_670x_pci_table[] = {
 279         { PCI_VDEVICE(NI, 0x1290), BOARD_PCI6704 },
 280         { PCI_VDEVICE(NI, 0x1920), BOARD_PXI6704 },
 281         { PCI_VDEVICE(NI, 0x2c90), BOARD_PCI6703 },
 282         { 0 }
 283 };
 284 MODULE_DEVICE_TABLE(pci, ni_670x_pci_table);
 285
 286 static struct pci_driver ni_670x_pci_driver = {
 287         .name           = "ni_670x",
 288         .id_table       = ni_670x_pci_table,
 289         .probe          = ni_670x_pci_probe,
 290         .remove         = comedi_pci_auto_unconfig,
 291 };
 292 module_comedi_pci_driver(ni_670x_driver, ni_670x_pci_driver);
 293
 294 MODULE_AUTHOR("Comedi http://www.comedi.org");
 295 MODULE_DESCRIPTION("Comedi low-level driver");
 296 MODULE_LICENSE("GPL");