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 <linux/pci.h>
  58
  59 #include "../comedidev.h"
  60
  61 #include "8255.h"
  62
  63 /*
  64  * PCI Device ID's supported by this driver
  65  */
  66 #define PCI_DEVICE_ID_ADLINK_PCI7224    0x7224
  67 #define PCI_DEVICE_ID_ADLINK_PCI7248    0x7248
  68 #define PCI_DEVICE_ID_ADLINK_PCI7296    0x7296
  69
  70 #define PCI_DEVICE_ID_CB_PCIDIO48H      0x000b
  71 #define PCI_DEVICE_ID_CB_PCIDIO24H      0x0014
  72 #define PCI_DEVICE_ID_CB_PCIDIO96H      0x0017
  73 #define PCI_DEVICE_ID_CB_PCIDIO24       0x0028
  74
  75 #define PCI_DEVICE_ID_NI_PCIDIO96       0x0160
  76 #define PCI_DEVICE_ID_NI_PCI6503        0x0400
  77 #define PCI_DEVICE_ID_NI_PCI6503B       0x1250
  78 #define PCI_DEVICE_ID_NI_PXI6508        0x13c0
  79 #define PCI_DEVICE_ID_NI_PCIDIO96B      0x1630
  80 #define PCI_DEVICE_ID_NI_PCI6503X       0x17d0
  81 #define PCI_DEVICE_ID_NI_PXI_6503       0x1800
  82
  83 struct pci_8255_boardinfo {
  84         const char *name;
  85         unsigned short vendor;
  86         unsigned short device;
  87         int dio_badr;
  88         int is_mmio;
  89         int n_8255;
  90 };
  91
  92 static const struct pci_8255_boardinfo pci_8255_boards[] = {
  93         {
  94                 .name           = "adl_pci-7224",
  95                 .vendor         = PCI_VENDOR_ID_ADLINK,
  96                 .device         = PCI_DEVICE_ID_ADLINK_PCI7224,
  97                 .dio_badr       = 2,
  98                 .n_8255         = 1,
  99         }, {
 100                 .name           = "adl_pci-7248",
 101                 .vendor         = PCI_VENDOR_ID_ADLINK,
 102                 .device         = PCI_DEVICE_ID_ADLINK_PCI7248,
 103                 .dio_badr       = 2,
 104                 .n_8255         = 2,
 105         }, {
 106                 .name           = "adl_pci-7296",
 107                 .vendor         = PCI_VENDOR_ID_ADLINK,
 108                 .device         = PCI_DEVICE_ID_ADLINK_PCI7296,
 109                 .dio_badr       = 2,
 110                 .n_8255         = 4,
 111         }, {
 112                 .name           = "cb_pci-dio24",
 113                 .vendor         = PCI_VENDOR_ID_CB,
 114                 .device         = PCI_DEVICE_ID_CB_PCIDIO24,
 115                 .dio_badr       = 2,
 116                 .n_8255         = 1,
 117         }, {
 118                 .name           = "cb_pci-dio24h",
 119                 .vendor         = PCI_VENDOR_ID_CB,
 120                 .device         = PCI_DEVICE_ID_CB_PCIDIO24H,
 121                 .dio_badr       = 2,
 122                 .n_8255         = 1,
 123         }, {
 124                 .name           = "cb_pci-dio48h",
 125                 .vendor         = PCI_VENDOR_ID_CB,
 126                 .device         = PCI_DEVICE_ID_CB_PCIDIO48H,
 127                 .dio_badr       = 1,
 128                 .n_8255         = 2,
 129         }, {
 130                 .name           = "cb_pci-dio96h",
 131                 .vendor         = PCI_VENDOR_ID_CB,
 132                 .device         = PCI_DEVICE_ID_CB_PCIDIO96H,
 133                 .dio_badr       = 2,
 134                 .n_8255         = 4,
 135         }, {
 136                 .name           = "ni_pci-dio-96",
 137                 .vendor         = PCI_VENDOR_ID_NI,
 138                 .device         = PCI_DEVICE_ID_NI_PCIDIO96,
 139                 .dio_badr       = 1,
 140                 .is_mmio        = 1,
 141                 .n_8255         = 4,
 142         }, {
 143                 .name           = "ni_pci-dio-96b",
 144                 .vendor         = PCI_VENDOR_ID_NI,
 145                 .device         = PCI_DEVICE_ID_NI_PCIDIO96B,
 146                 .dio_badr       = 1,
 147                 .is_mmio        = 1,
 148                 .n_8255         = 4,
 149         }, {
 150                 .name           = "ni_pxi-6508",
 151                 .vendor         = PCI_VENDOR_ID_NI,
 152                 .device         = PCI_DEVICE_ID_NI_PXI6508,
 153                 .dio_badr       = 1,
 154                 .is_mmio        = 1,
 155                 .n_8255         = 4,
 156         }, {
 157                 .name           = "ni_pci-6503",
 158                 .vendor         = PCI_VENDOR_ID_NI,
 159                 .device         = PCI_DEVICE_ID_NI_PCI6503,
 160                 .dio_badr       = 1,
 161                 .is_mmio        = 1,
 162                 .n_8255         = 1,
 163         }, {
 164                 .name           = "ni_pci-6503b",
 165                 .vendor         = PCI_VENDOR_ID_NI,
 166                 .device         = PCI_DEVICE_ID_NI_PCI6503B,
 167                 .dio_badr       = 1,
 168                 .is_mmio        = 1,
 169                 .n_8255         = 1,
 170         }, {
 171                 .name           = "ni_pci-6503x",
 172                 .vendor         = PCI_VENDOR_ID_NI,
 173                 .device         = PCI_DEVICE_ID_NI_PCI6503X,
 174                 .dio_badr       = 1,
 175                 .is_mmio        = 1,
 176                 .n_8255         = 1,
 177         }, {
 178                 .name           = "ni_pxi-6503",
 179                 .vendor         = PCI_VENDOR_ID_NI,
 180                 .device         = PCI_DEVICE_ID_NI_PXI_6503,
 181                 .dio_badr       = 1,
 182                 .is_mmio        = 1,
 183                 .n_8255         = 1,
 184         },
 185 };
 186
 187 struct pci_8255_private {
 188         void __iomem *mmio_base;
 189 };
 190
 191 static int pci_8255_mmio(int dir, int port, int data, unsigned long iobase)
 192 {
 193         void __iomem *mmio_base = (void __iomem *)iobase;
 194
 195         if (dir) {
 196                 writeb(data, mmio_base + port);
 197                 return 0;
 198         } else {
 199                 return readb(mmio_base  + port);
 200         }
 201 }
 202
 203 static const void *pci_8255_find_boardinfo(struct comedi_device *dev,
 204                                               struct pci_dev *pcidev)
 205 {
 206         const struct pci_8255_boardinfo *board;
 207         int i;
 208
 209         for (i = 0; i < ARRAY_SIZE(pci_8255_boards); i++) {
 210                 board = &pci_8255_boards[i];
 211                 if (pcidev->vendor == board->vendor &&
 212                     pcidev->device == board->device)
 213                         return board;
 214         }
 215         return NULL;
 216 }
 217
 218 static int pci_8255_auto_attach(struct comedi_device *dev,
 219                                           unsigned long context_unused)
 220 {
 221         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 222         const struct pci_8255_boardinfo *board;
 223         struct pci_8255_private *devpriv;
 224         struct comedi_subdevice *s;
 225         resource_size_t iobase;
 226         unsigned long len;
 227         int ret;
 228         int i;
 229
 230         board = pci_8255_find_boardinfo(dev, pcidev);
 231         if (!board)
 232                 return -ENODEV;
 233         dev->board_ptr = board;
 234         dev->board_name = board->name;
 235
 236         devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
 237         if (!devpriv)
 238                 return -ENOMEM;
 239         dev->private = devpriv;
 240
 241         ret = comedi_pci_enable(pcidev, dev->board_name);
 242         if (ret)
 243                 return ret;
 244         iobase = pci_resource_start(pcidev, board->dio_badr);
 245         len = pci_resource_len(pcidev, board->dio_badr);
 246
 247         if (board->is_mmio) {
 248                 devpriv->mmio_base = ioremap(iobase, len);
 249                 if (!devpriv->mmio_base)
 250                         return -ENOMEM;
 251         }
 252         dev->iobase = iobase;
 253
 254         /*
 255          * One, two, or four subdevices are setup by this driver depending
 256          * on the number of channels provided by the board. Each subdevice
 257          * has 24 channels supported by the 8255 module.
 258          */
 259         ret = comedi_alloc_subdevices(dev, board->n_8255);
 260         if (ret)
 261                 return ret;
 262
 263         for (i = 0; i < board->n_8255; i++) {
 264                 s = &dev->subdevices[i];
 265                 if (board->is_mmio) {
 266                         iobase = (unsigned long)(devpriv->mmio_base + (i * 4));
 267                         ret = subdev_8255_init(dev, s, pci_8255_mmio, iobase);
 268                 } else {
 269                         iobase = dev->iobase + (i * 4);
 270                         ret = subdev_8255_init(dev, s, NULL, iobase);
 271                 }
 272                 if (ret)
 273                         return ret;
 274         }
 275
 276         dev_info(dev->class_dev, "%s attached (%d digital i/o channels)\n",
 277                 dev->board_name, board->n_8255 * 24);
 278
 279         return 0;
 280 }
 281
 282 static void pci_8255_detach(struct comedi_device *dev)
 283 {
 284         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 285         const struct pci_8255_boardinfo *board = comedi_board(dev);
 286         struct pci_8255_private *devpriv = dev->private;
 287         struct comedi_subdevice *s;
 288         int i;
 289
 290         if (!board || !devpriv)
 291                 return;
 292         if (dev->subdevices) {
 293                 for (i = 0; i < board->n_8255; i++) {
 294                         s = &dev->subdevices[i];
 295                         subdev_8255_cleanup(dev, s);
 296                 }
 297         }
 298         if (pcidev) {
 299                 if (devpriv->mmio_base)
 300                         iounmap(devpriv->mmio_base);
 301                 if (dev->iobase)
 302                         comedi_pci_disable(pcidev);
 303         }
 304 }
 305
 306 static struct comedi_driver pci_8255_driver = {
 307         .driver_name    = "8255_pci",
 308         .module         = THIS_MODULE,
 309         .auto_attach    = pci_8255_auto_attach,
 310         .detach         = pci_8255_detach,
 311 };
 312
 313 static int pci_8255_pci_probe(struct pci_dev *dev,
 314                                         const struct pci_device_id *ent)
 315 {
 316         return comedi_pci_auto_config(dev, &pci_8255_driver);
 317 }
 318
 319 static DEFINE_PCI_DEVICE_TABLE(pci_8255_pci_table) = {
 320         { PCI_DEVICE(PCI_VENDOR_ID_ADLINK, PCI_DEVICE_ID_ADLINK_PCI7224) },
 321         { PCI_DEVICE(PCI_VENDOR_ID_ADLINK, PCI_DEVICE_ID_ADLINK_PCI7248) },
 322         { PCI_DEVICE(PCI_VENDOR_ID_ADLINK, PCI_DEVICE_ID_ADLINK_PCI7296) },
 323         { PCI_DEVICE(PCI_VENDOR_ID_CB, PCI_DEVICE_ID_CB_PCIDIO24) },
 324         { PCI_DEVICE(PCI_VENDOR_ID_CB, PCI_DEVICE_ID_CB_PCIDIO24H) },
 325         { PCI_DEVICE(PCI_VENDOR_ID_CB, PCI_DEVICE_ID_CB_PCIDIO48H) },
 326         { PCI_DEVICE(PCI_VENDOR_ID_CB, PCI_DEVICE_ID_CB_PCIDIO96H) },
 327         { PCI_DEVICE(PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCIDIO96) },
 328         { PCI_DEVICE(PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCIDIO96B) },
 329         { PCI_DEVICE(PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI6508) },
 330         { PCI_DEVICE(PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI6503) },
 331         { PCI_DEVICE(PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI6503B) },
 332         { PCI_DEVICE(PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI6503X) },
 333         { PCI_DEVICE(PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI_6503) },
 334         { 0 }
 335 };
 336 MODULE_DEVICE_TABLE(pci, pci_8255_pci_table);
 337
 338 static struct pci_driver pci_8255_pci_driver = {
 339         .name           = "8255_pci",
 340         .id_table       = pci_8255_pci_table,
 341         .probe          = pci_8255_pci_probe,
 342         .remove         = comedi_pci_auto_unconfig,
 343 };
 344 module_comedi_pci_driver(pci_8255_driver, pci_8255_pci_driver);
 345
 346 MODULE_DESCRIPTION("COMEDI - Generic PCI based 8255 Digital I/O boards");
 347 MODULE_AUTHOR("Comedi http://www.comedi.org");
 348 MODULE_LICENSE("GPL");