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
  24 /*
  25 Driver: 8255_pci
  26 Description: Generic PCI based 8255 Digital I/O boards
  27 Devices: (ADLink) PCI-7224 [adl_pci-7224] - 24 channels
  28          (ADLink) PCI-7248 [adl_pci-7248] - 48 channels
  29          (ADLink) PCI-7296 [adl_pci-7296] - 96 channels
  30          (Measurement Computing) PCI-DIO24 [cb_pci-dio24] - 24 channels
  31          (Measurement Computing) PCI-DIO24H [cb_pci-dio24h] - 24 channels
  32          (Measurement Computing) PCI-DIO48H [cb_pci-dio48h] - 48 channels
  33          (Measurement Computing) PCI-DIO96H [cb_pci-dio96h] - 96 channels
  34          (National Instruments) PCI-DIO-96 [ni_pci-dio-96] - 96 channels
  35          (National Instruments) PCI-DIO-96B [ni_pci-dio-96b] - 96 channels
  36          (National Instruments) PXI-6508 [ni_pxi-6508] - 96 channels
  37          (National Instruments) PCI-6503 [ni_pci-6503] - 24 channels
  38          (National Instruments) PCI-6503B [ni_pci-6503b] - 24 channels
  39          (National Instruments) PCI-6503X [ni_pci-6503x] - 24 channels
  40          (National Instruments) PXI-6503 [ni_pxi-6503] - 24 channels
  41 Author: H Hartley Sweeten <hsweeten@visionengravers.com>
  42 Updated: Wed, 12 Sep 2012 11:52:01 -0700
  43 Status: untested
  44
  45 Some of these boards also have an 8254 programmable timer/counter
  46 chip. This chip is not currently supported by this driver.
  47
  48 Interrupt support for these boards is also not currently supported.
  49
  50 Configuration Options: not applicable, uses PCI auto config
  51 */
  52
  53 #include <linux/pci.h>
  54
  55 #include "../comedidev.h"
  56
  57 #include "8255.h"
  58
  59 enum pci_8255_boardid {
  60         BOARD_ADLINK_PCI7224,
  61         BOARD_ADLINK_PCI7248,
  62         BOARD_ADLINK_PCI7296,
  63         BOARD_CB_PCIDIO24,
  64         BOARD_CB_PCIDIO24H,
  65         BOARD_CB_PCIDIO48H,
  66         BOARD_CB_PCIDIO96H,
  67         BOARD_NI_PCIDIO96,
  68         BOARD_NI_PCIDIO96B,
  69         BOARD_NI_PXI6508,
  70         BOARD_NI_PCI6503,
  71         BOARD_NI_PCI6503B,
  72         BOARD_NI_PCI6503X,
  73         BOARD_NI_PXI_6503,
  74 };
  75
  76 struct pci_8255_boardinfo {
  77         const char *name;
  78         int dio_badr;
  79         int n_8255;
  80 };
  81
  82 static const struct pci_8255_boardinfo pci_8255_boards[] = {
  83         [BOARD_ADLINK_PCI7224] = {
  84                 .name           = "adl_pci-7224",
  85                 .dio_badr       = 2,
  86                 .n_8255         = 1,
  87         },
  88         [BOARD_ADLINK_PCI7248] = {
  89                 .name           = "adl_pci-7248",
  90                 .dio_badr       = 2,
  91                 .n_8255         = 2,
  92         },
  93         [BOARD_ADLINK_PCI7296] = {
  94                 .name           = "adl_pci-7296",
  95                 .dio_badr       = 2,
  96                 .n_8255         = 4,
  97         },
  98         [BOARD_CB_PCIDIO24] = {
  99                 .name           = "cb_pci-dio24",
 100                 .dio_badr       = 2,
 101                 .n_8255         = 1,
 102         },
 103         [BOARD_CB_PCIDIO24H] = {
 104                 .name           = "cb_pci-dio24h",
 105                 .dio_badr       = 2,
 106                 .n_8255         = 1,
 107         },
 108         [BOARD_CB_PCIDIO48H] = {
 109                 .name           = "cb_pci-dio48h",
 110                 .dio_badr       = 1,
 111                 .n_8255         = 2,
 112         },
 113         [BOARD_CB_PCIDIO96H] = {
 114                 .name           = "cb_pci-dio96h",
 115                 .dio_badr       = 2,
 116                 .n_8255         = 4,
 117         },
 118         [BOARD_NI_PCIDIO96] = {
 119                 .name           = "ni_pci-dio-96",
 120                 .dio_badr       = 1,
 121                 .n_8255         = 4,
 122         },
 123         [BOARD_NI_PCIDIO96B] = {
 124                 .name           = "ni_pci-dio-96b",
 125                 .dio_badr       = 1,
 126                 .n_8255         = 4,
 127         },
 128         [BOARD_NI_PXI6508] = {
 129                 .name           = "ni_pxi-6508",
 130                 .dio_badr       = 1,
 131                 .n_8255         = 4,
 132         },
 133         [BOARD_NI_PCI6503] = {
 134                 .name           = "ni_pci-6503",
 135                 .dio_badr       = 1,
 136                 .n_8255         = 1,
 137         },
 138         [BOARD_NI_PCI6503B] = {
 139                 .name           = "ni_pci-6503b",
 140                 .dio_badr       = 1,
 141                 .n_8255         = 1,
 142         },
 143         [BOARD_NI_PCI6503X] = {
 144                 .name           = "ni_pci-6503x",
 145                 .dio_badr       = 1,
 146                 .n_8255         = 1,
 147         },
 148         [BOARD_NI_PXI_6503] = {
 149                 .name           = "ni_pxi-6503",
 150                 .dio_badr       = 1,
 151                 .n_8255         = 1,
 152         },
 153 };
 154
 155 struct pci_8255_private {
 156         void __iomem *mmio_base;
 157 };
 158
 159 static int pci_8255_mmio(int dir, int port, int data, unsigned long iobase)
 160 {
 161         void __iomem *mmio_base = (void __iomem *)iobase;
 162
 163         if (dir) {
 164                 writeb(data, mmio_base + port);
 165                 return 0;
 166         } else {
 167                 return readb(mmio_base  + port);
 168         }
 169 }
 170
 171 static int pci_8255_auto_attach(struct comedi_device *dev,
 172                                 unsigned long context)
 173 {
 174         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 175         const struct pci_8255_boardinfo *board = NULL;
 176         struct pci_8255_private *devpriv;
 177         struct comedi_subdevice *s;
 178         bool is_mmio;
 179         int ret;
 180         int i;
 181
 182         if (context < ARRAY_SIZE(pci_8255_boards))
 183                 board = &pci_8255_boards[context];
 184         if (!board)
 185                 return -ENODEV;
 186         dev->board_ptr = board;
 187         dev->board_name = board->name;
 188
 189         devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
 190         if (!devpriv)
 191                 return -ENOMEM;
 192         dev->private = devpriv;
 193
 194         ret = comedi_pci_enable(dev);
 195         if (ret)
 196                 return ret;
 197
 198         is_mmio = (pci_resource_flags(pcidev, board->dio_badr) &
 199                    IORESOURCE_MEM) != 0;
 200         if (is_mmio) {
 201                 devpriv->mmio_base = pci_ioremap_bar(pcidev, board->dio_badr);
 202                 if (!devpriv->mmio_base)
 203                         return -ENOMEM;
 204         } else {
 205                 dev->iobase = pci_resource_start(pcidev, board->dio_badr);
 206         }
 207
 208         /*
 209          * One, two, or four subdevices are setup by this driver depending
 210          * on the number of channels provided by the board. Each subdevice
 211          * has 24 channels supported by the 8255 module.
 212          */
 213         ret = comedi_alloc_subdevices(dev, board->n_8255);
 214         if (ret)
 215                 return ret;
 216
 217         for (i = 0; i < board->n_8255; i++) {
 218                 unsigned long iobase;
 219
 220                 s = &dev->subdevices[i];
 221                 if (is_mmio) {
 222                         iobase = (unsigned long)(devpriv->mmio_base + (i * 4));
 223                         ret = subdev_8255_init(dev, s, pci_8255_mmio, iobase);
 224                 } else {
 225                         iobase = dev->iobase + (i * 4);
 226                         ret = subdev_8255_init(dev, s, NULL, iobase);
 227                 }
 228                 if (ret)
 229                         return ret;
 230         }
 231
 232         dev_info(dev->class_dev, "%s attached (%d digital i/o channels)\n",
 233                 dev->board_name, board->n_8255 * 24);
 234
 235         return 0;
 236 }
 237
 238 static void pci_8255_detach(struct comedi_device *dev)
 239 {
 240         struct pci_8255_private *devpriv = dev->private;
 241
 242         if (devpriv && devpriv->mmio_base)
 243                 iounmap(devpriv->mmio_base);
 244         comedi_pci_disable(dev);
 245 }
 246
 247 static struct comedi_driver pci_8255_driver = {
 248         .driver_name    = "8255_pci",
 249         .module         = THIS_MODULE,
 250         .auto_attach    = pci_8255_auto_attach,
 251         .detach         = pci_8255_detach,
 252 };
 253
 254 static int pci_8255_pci_probe(struct pci_dev *dev,
 255                               const struct pci_device_id *id)
 256 {
 257         return comedi_pci_auto_config(dev, &pci_8255_driver, id->driver_data);
 258 }
 259
 260 static DEFINE_PCI_DEVICE_TABLE(pci_8255_pci_table) = {
 261         { PCI_VDEVICE(ADLINK, 0x7224), BOARD_ADLINK_PCI7224 },
 262         { PCI_VDEVICE(ADLINK, 0x7248), BOARD_ADLINK_PCI7248 },
 263         { PCI_VDEVICE(ADLINK, 0x7296), BOARD_ADLINK_PCI7296 },
 264         { PCI_VDEVICE(CB, 0x0028), BOARD_CB_PCIDIO24 },
 265         { PCI_VDEVICE(CB, 0x0014), BOARD_CB_PCIDIO24H },
 266         { PCI_VDEVICE(CB, 0x000b), BOARD_CB_PCIDIO48H },
 267         { PCI_VDEVICE(CB, 0x0017), BOARD_CB_PCIDIO96H },
 268         { PCI_VDEVICE(NI, 0x0160), BOARD_NI_PCIDIO96 },
 269         { PCI_VDEVICE(NI, 0x1630), BOARD_NI_PCIDIO96B },
 270         { PCI_VDEVICE(NI, 0x13c0), BOARD_NI_PXI6508 },
 271         { PCI_VDEVICE(NI, 0x0400), BOARD_NI_PCI6503 },
 272         { PCI_VDEVICE(NI, 0x1250), BOARD_NI_PCI6503B },
 273         { PCI_VDEVICE(NI, 0x17d0), BOARD_NI_PCI6503X },
 274         { PCI_VDEVICE(NI, 0x1800), BOARD_NI_PXI_6503 },
 275         { 0 }
 276 };
 277 MODULE_DEVICE_TABLE(pci, pci_8255_pci_table);
 278
 279 static struct pci_driver pci_8255_pci_driver = {
 280         .name           = "8255_pci",
 281         .id_table       = pci_8255_pci_table,
 282         .probe          = pci_8255_pci_probe,
 283         .remove         = comedi_pci_auto_unconfig,
 284 };
 285 module_comedi_pci_driver(pci_8255_driver, pci_8255_pci_driver);
 286
 287 MODULE_DESCRIPTION("COMEDI - Generic PCI based 8255 Digital I/O boards");
 288 MODULE_AUTHOR("Comedi http://www.comedi.org");
 289 MODULE_LICENSE("GPL");