drivers/staging/comedi/drivers/8255_pci.c

   1 /*
   2  * COMEDI driver for generic PCI based 8255 digital i/o boards
   3  * Copyright (C) 2012 H Hartley Sweeten <hsweeten@visionengravers.com>
   4  *
   5  * Based on the tested adl_pci7296 driver written by:
   6  *      Jon Grierson <jd@renko.co.uk>
   7  * and the experimental cb_pcidio driver written by:
   8  *      Yoshiya Matsuzaka
   9  *
  10  * COMEDI - Linux Control and Measurement Device Interface
  11  * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26  */
  27
  28 /*
  29 Driver: 8255_pci
  30 Description: Generic PCI based 8255 Digital I/O boards
  31 Devices: (ADLink) PCI-7224 [adl_pci-7224] - 24 channels
  32          (ADLink) PCI-7248 [adl_pci-7248] - 48 channels
  33          (ADLink) PCI-7296 [adl_pci-7296] - 96 channels
  34          (Measurement Computing) PCI-DIO24 [cb_pci-dio24] - 24 channels
  35          (Measurement Computing) PCI-DIO24H [cb_pci-dio24h] - 24 channels
  36          (Measurement Computing) PCI-DIO48H [cb_pci-dio48h] - 48 channels
  37          (Measurement Computing) PCI-DIO96H [cb_pci-dio96h] - 96 channels
  38          (National Instruments) PCI-DIO-96 [ni_pci-dio-96] - 96 channels
  39          (National Instruments) PCI-DIO-96B [ni_pci-dio-96b] - 96 channels
  40          (National Instruments) PXI-6508 [ni_pxi-6508] - 96 channels
  41          (National Instruments) PCI-6503 [ni_pci-6503] - 24 channels
  42          (National Instruments) PCI-6503B [ni_pci-6503b] - 24 channels
  43          (National Instruments) PCI-6503X [ni_pci-6503x] - 24 channels
  44          (National Instruments) PXI-6503 [ni_pxi-6503] - 24 channels
  45 Author: H Hartley Sweeten <hsweeten@visionengravers.com>
  46 Updated: Wed, 12 Sep 2012 11:52:01 -0700
  47 Status: untested
  48
  49 Some of these boards also have an 8254 programmable timer/counter
  50 chip. This chip is not currently supported by this driver.
  51
  52 Interrupt support for these boards is also not currently supported.
  53
  54 Configuration Options: not applicable, uses PCI auto config
  55 */
  56
  57 #include "../comedidev.h"
  58
  59 #include "8255.h"
  60
  61 /*
  62  * PCI Device ID's supported by this driver
  63  */
  64 #define PCI_DEVICE_ID_ADLINK_PCI7224    0x7224
  65 #define PCI_DEVICE_ID_ADLINK_PCI7248    0x7248
  66 #define PCI_DEVICE_ID_ADLINK_PCI7296    0x7296
  67
  68 #define PCI_DEVICE_ID_CB_PCIDIO48H      0x000b
  69 #define PCI_DEVICE_ID_CB_PCIDIO24H      0x0014
  70 #define PCI_DEVICE_ID_CB_PCIDIO96H      0x0017
  71 #define PCI_DEVICE_ID_CB_PCIDIO24       0x0028
  72
  73 #define PCI_DEVICE_ID_NI_PCIDIO96       0x0160
  74 #define PCI_DEVICE_ID_NI_PCI6503        0x0400
  75 #define PCI_DEVICE_ID_NI_PCI6503B       0x1250
  76 #define PCI_DEVICE_ID_NI_PXI6508        0x13c0
  77 #define PCI_DEVICE_ID_NI_PCIDIO96B      0x1630
  78 #define PCI_DEVICE_ID_NI_PCI6503X       0x17d0
  79 #define PCI_DEVICE_ID_NI_PXI_6503       0x1800
  80
  81 struct pci_8255_boardinfo {
  82         const char *name;
  83         unsigned short vendor;
  84         unsigned short device;
  85         int dio_badr;
  86         int is_mmio;
  87         int n_8255;
  88 };
  89
  90 static const struct pci_8255_boardinfo pci_8255_boards[] = {
  91         {
  92                 .name           = "adl_pci-7224",
  93                 .vendor         = PCI_VENDOR_ID_ADLINK,
  94                 .device         = PCI_DEVICE_ID_ADLINK_PCI7224,
  95                 .dio_badr       = 2,
  96                 .n_8255         = 1,
  97         }, {
  98                 .name           = "adl_pci-7248",
  99                 .vendor         = PCI_VENDOR_ID_ADLINK,
 100                 .device         = PCI_DEVICE_ID_ADLINK_PCI7248,
 101                 .dio_badr       = 2,
 102                 .n_8255         = 2,
 103         }, {
 104                 .name           = "adl_pci-7296",
 105                 .vendor         = PCI_VENDOR_ID_ADLINK,
 106                 .device         = PCI_DEVICE_ID_ADLINK_PCI7296,
 107                 .dio_badr       = 2,
 108                 .n_8255         = 4,
 109         }, {
 110                 .name           = "cb_pci-dio24",
 111                 .vendor         = PCI_VENDOR_ID_CB,
 112                 .device         = PCI_DEVICE_ID_CB_PCIDIO24,
 113                 .dio_badr       = 2,
 114                 .n_8255         = 1,
 115         }, {
 116                 .name           = "cb_pci-dio24h",
 117                 .vendor         = PCI_VENDOR_ID_CB,
 118                 .device         = PCI_DEVICE_ID_CB_PCIDIO24H,
 119                 .dio_badr       = 2,
 120                 .n_8255         = 1,
 121         }, {
 122                 .name           = "cb_pci-dio48h",
 123                 .vendor         = PCI_VENDOR_ID_CB,
 124                 .device         = PCI_DEVICE_ID_CB_PCIDIO48H,
 125                 .dio_badr       = 1,
 126                 .n_8255         = 2,
 127         }, {
 128                 .name           = "cb_pci-dio96h",
 129                 .vendor         = PCI_VENDOR_ID_CB,
 130                 .device         = PCI_DEVICE_ID_CB_PCIDIO96H,
 131                 .dio_badr       = 2,
 132                 .n_8255         = 4,
 133         }, {
 134                 .name           = "ni_pci-dio-96",
 135                 .vendor         = PCI_VENDOR_ID_NI,
 136                 .device         = PCI_DEVICE_ID_NI_PCIDIO96,
 137                 .dio_badr       = 1,
 138                 .is_mmio        = 1,
 139                 .n_8255         = 4,
 140         }, {
 141                 .name           = "ni_pci-dio-96b",
 142                 .vendor         = PCI_VENDOR_ID_NI,
 143                 .device         = PCI_DEVICE_ID_NI_PCIDIO96B,
 144                 .dio_badr       = 1,
 145                 .is_mmio        = 1,
 146                 .n_8255         = 4,
 147         }, {
 148                 .name           = "ni_pxi-6508",
 149                 .vendor         = PCI_VENDOR_ID_NI,
 150                 .device         = PCI_DEVICE_ID_NI_PXI6508,
 151                 .dio_badr       = 1,
 152                 .is_mmio        = 1,
 153                 .n_8255         = 4,
 154         }, {
 155                 .name           = "ni_pci-6503",
 156                 .vendor         = PCI_VENDOR_ID_NI,
 157                 .device         = PCI_DEVICE_ID_NI_PCI6503,
 158                 .dio_badr       = 1,
 159                 .is_mmio        = 1,
 160                 .n_8255         = 1,
 161         }, {
 162                 .name           = "ni_pci-6503b",
 163                 .vendor         = PCI_VENDOR_ID_NI,
 164                 .device         = PCI_DEVICE_ID_NI_PCI6503B,
 165                 .dio_badr       = 1,
 166                 .is_mmio        = 1,
 167                 .n_8255         = 1,
 168         }, {
 169                 .name           = "ni_pci-6503x",
 170                 .vendor         = PCI_VENDOR_ID_NI,
 171                 .device         = PCI_DEVICE_ID_NI_PCI6503X,
 172                 .dio_badr       = 1,
 173                 .is_mmio        = 1,
 174                 .n_8255         = 1,
 175         }, {
 176                 .name           = "ni_pxi-6503",
 177                 .vendor         = PCI_VENDOR_ID_NI,
 178                 .device         = PCI_DEVICE_ID_NI_PXI_6503,
 179                 .dio_badr       = 1,
 180                 .is_mmio        = 1,
 181                 .n_8255         = 1,
 182         },
 183 };
 184
 185 struct pci_8255_private {
 186         void __iomem *mmio_base;
 187 };
 188
 189 static int pci_8255_mmio(int dir, int port, int data, unsigned long iobase)
 190 {
 191         void __iomem *mmio_base = (void __iomem *)iobase;
 192
 193         if (dir) {
 194                 writeb(data, mmio_base + port);
 195                 return 0;
 196         } else {
 197                 return readb(mmio_base  + port);
 198         }
 199 }
 200
 201 static const void *pci_8255_find_boardinfo(struct comedi_device *dev,
 202                                               struct pci_dev *pcidev)
 203 {
 204         const struct pci_8255_boardinfo *board;
 205         int i;
 206
 207         for (i = 0; i < ARRAY_SIZE(pci_8255_boards); i++) {
 208                 board = &pci_8255_boards[i];
 209                 if (pcidev->vendor == board->vendor &&
 210                     pcidev->device == board->device)
 211                         return board;
 212         }
 213         return NULL;
 214 }
 215
 216 static int pci_8255_attach_pci(struct comedi_device *dev,
 217                                struct pci_dev *pcidev)
 218 {
 219         const struct pci_8255_boardinfo *board;
 220         struct pci_8255_private *devpriv;
 221         struct comedi_subdevice *s;
 222         resource_size_t iobase;
 223         unsigned long len;
 224         int ret;
 225         int i;
 226
 227         board = pci_8255_find_boardinfo(dev, pcidev);
 228         if (!board)
 229                 return -ENODEV;
 230         dev->board_ptr = board;
 231         dev->board_name = board->name;
 232
 233         devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
 234         if (!devpriv)
 235                 return -ENOMEM;
 236         dev->private = devpriv;
 237
 238         ret = comedi_pci_enable(pcidev, dev->board_name);
 239         if (ret)
 240                 return ret;
 241         iobase = pci_resource_start(pcidev, board->dio_badr);
 242         len = pci_resource_len(pcidev, board->dio_badr);
 243
 244         if (board->is_mmio) {
 245                 devpriv->mmio_base = ioremap(iobase, len);
 246                 if (!devpriv->mmio_base)
 247                         return -ENOMEM;
 248         }
 249         dev->iobase = iobase;
 250
 251         /*
 252          * One, two, or four subdevices are setup by this driver depending
 253          * on the number of channels provided by the board. Each subdevice
 254          * has 24 channels supported by the 8255 module.
 255          */
 256         ret = comedi_alloc_subdevices(dev, board->n_8255);
 257         if (ret)
 258                 return ret;
 259
 260         for (i = 0; i < board->n_8255; i++) {
 261                 s = &dev->subdevices[i];
 262                 if (board->is_mmio) {
 263                         iobase = (unsigned long)(devpriv->mmio_base + (i * 4));
 264                         ret = subdev_8255_init(dev, s, pci_8255_mmio, iobase);
 265                 } else {
 266                         iobase = dev->iobase + (i * 4);
 267                         ret = subdev_8255_init(dev, s, NULL, iobase);
 268                 }
 269                 if (ret)
 270                         return ret;
 271         }
 272
 273         dev_info(dev->class_dev, "%s attached (%d digital i/o channels)\n",
 274                 dev->board_name, board->n_8255 * 24);
 275
 276         return 0;
 277 }
 278
 279 static void pci_8255_detach(struct comedi_device *dev)
 280 {
 281         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 282         const struct pci_8255_boardinfo *board = comedi_board(dev);
 283         struct pci_8255_private *devpriv = dev->private;
 284         struct comedi_subdevice *s;
 285         int i;
 286
 287         if (!board || !devpriv)
 288                 return;
 289         if (dev->subdevices) {
 290                 for (i = 0; i < board->n_8255; i++) {
 291                         s = &dev->subdevices[i];
 292                         subdev_8255_cleanup(dev, s);
 293                 }
 294         }
 295         if (pcidev) {
 296                 if (devpriv->mmio_base)
 297                         iounmap(devpriv->mmio_base);
 298                 if (dev->iobase)
 299                         comedi_pci_disable(pcidev);
 300         }
 301 }
 302
 303 static struct comedi_driver pci_8255_driver = {
 304         .driver_name    = "8255_pci",
 305         .module         = THIS_MODULE,
 306         .attach_pci     = pci_8255_attach_pci,
 307         .detach         = pci_8255_detach,
 308 };
 309
 310 static int __devinit pci_8255_pci_probe(struct pci_dev *dev,
 311                                         const struct pci_device_id *ent)
 312 {
 313         return comedi_pci_auto_config(dev, &pci_8255_driver);
 314 }
 315
 316 static void __devexit pci_8255_pci_remove(struct pci_dev *dev)
 317 {
 318         comedi_pci_auto_unconfig(dev);
 319 }
 320
 321 static DEFINE_PCI_DEVICE_TABLE(pci_8255_pci_table) = {
 322         { PCI_DEVICE(PCI_VENDOR_ID_ADLINK, PCI_DEVICE_ID_ADLINK_PCI7224) },
 323         { PCI_DEVICE(PCI_VENDOR_ID_ADLINK, PCI_DEVICE_ID_ADLINK_PCI7248) },
 324         { PCI_DEVICE(PCI_VENDOR_ID_ADLINK, PCI_DEVICE_ID_ADLINK_PCI7296) },
 325         { PCI_DEVICE(PCI_VENDOR_ID_CB, PCI_DEVICE_ID_CB_PCIDIO24) },
 326         { PCI_DEVICE(PCI_VENDOR_ID_CB, PCI_DEVICE_ID_CB_PCIDIO24H) },
 327         { PCI_DEVICE(PCI_VENDOR_ID_CB, PCI_DEVICE_ID_CB_PCIDIO48H) },
 328         { PCI_DEVICE(PCI_VENDOR_ID_CB, PCI_DEVICE_ID_CB_PCIDIO96H) },
 329         { PCI_DEVICE(PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCIDIO96) },
 330         { PCI_DEVICE(PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCIDIO96B) },
 331         { PCI_DEVICE(PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI6508) },
 332         { PCI_DEVICE(PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI6503) },
 333         { PCI_DEVICE(PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI6503B) },
 334         { PCI_DEVICE(PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI6503X) },
 335         { PCI_DEVICE(PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI_6503) },
 336         { 0 }
 337 };
 338 MODULE_DEVICE_TABLE(pci, pci_8255_pci_table);
 339
 340 static struct pci_driver pci_8255_pci_driver = {
 341         .name           = "8255_pci",
 342         .id_table       = pci_8255_pci_table,
 343         .probe          = pci_8255_pci_probe,
 344         .remove         = __devexit_p(pci_8255_pci_remove),
 345 };
 346 module_comedi_pci_driver(pci_8255_driver, pci_8255_pci_driver);
 347
 348 MODULE_DESCRIPTION("COMEDI - Generic PCI based 8255 Digital I/O boards");
 349 MODULE_AUTHOR("Comedi http://www.comedi.org");
 350 MODULE_LICENSE("GPL");