Version:  2.0.40 2.2.26 2.4.37 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1

Linux/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), PCI-7248 (adl_pci-7248),
 28  *   PCI-7296 (adl_pci-7296),
 29  *   [Measurement Computing] PCI-DIO24 (cb_pci-dio24),
 30  *   PCI-DIO24H (cb_pci-dio24h), PCI-DIO48H (cb_pci-dio48h),
 31  *   PCI-DIO96H (cb_pci-dio96h),
 32  *   [National Instruments] PCI-DIO-96 (ni_pci-dio-96),
 33  *   PCI-DIO-96B (ni_pci-dio-96b), PXI-6508 (ni_pxi-6508),
 34  *   PCI-6503 (ni_pci-6503), PCI-6503B (ni_pci-6503b),
 35  *   PCI-6503X (ni_pci-6503x), PXI-6503 (ni_pxi-6503)
 36  * Author: H Hartley Sweeten <hsweeten@visionengravers.com>
 37  * Updated: Wed, 12 Sep 2012 11:52:01 -0700
 38  * Status: untested
 39  *
 40  * These boards have one or more 8255 digital I/O chips, each of which
 41  * is supported as a separate 24-channel DIO subdevice.
 42  *
 43  * Boards with 24 DIO channels (1 DIO subdevice):
 44  *
 45  *   PCI-7224, PCI-DIO24, PCI-DIO24H, PCI-6503, PCI-6503B, PCI-6503X,
 46  *   PXI-6503
 47  *
 48  * Boards with 48 DIO channels (2 DIO subdevices):
 49  *
 50  *   PCI-7248, PCI-DIO48H
 51  *
 52  * Boards with 96 DIO channels (4 DIO subdevices):
 53  *
 54  *   PCI-7296, PCI-DIO96H, PCI-DIO-96, PCI-DIO-96B, PXI-6508
 55  *
 56  * Some of these boards also have an 8254 programmable timer/counter
 57  * chip.  This chip is not currently supported by this driver.
 58  *
 59  * Interrupt support for these boards is also not currently supported.
 60  *
 61  * Configuration Options: not applicable, uses PCI auto config.
 62  */
 63 
 64 #include <linux/module.h>
 65 
 66 #include "../comedi_pci.h"
 67 
 68 #include "8255.h"
 69 
 70 enum pci_8255_boardid {
 71         BOARD_ADLINK_PCI7224,
 72         BOARD_ADLINK_PCI7248,
 73         BOARD_ADLINK_PCI7296,
 74         BOARD_CB_PCIDIO24,
 75         BOARD_CB_PCIDIO24H,
 76         BOARD_CB_PCIDIO48H_OLD,
 77         BOARD_CB_PCIDIO48H_NEW,
 78         BOARD_CB_PCIDIO96H,
 79         BOARD_NI_PCIDIO96,
 80         BOARD_NI_PCIDIO96B,
 81         BOARD_NI_PXI6508,
 82         BOARD_NI_PCI6503,
 83         BOARD_NI_PCI6503B,
 84         BOARD_NI_PCI6503X,
 85         BOARD_NI_PXI_6503,
 86 };
 87 
 88 struct pci_8255_boardinfo {
 89         const char *name;
 90         int dio_badr;
 91         int n_8255;
 92         unsigned int has_mite:1;
 93 };
 94 
 95 static const struct pci_8255_boardinfo pci_8255_boards[] = {
 96         [BOARD_ADLINK_PCI7224] = {
 97                 .name           = "adl_pci-7224",
 98                 .dio_badr       = 2,
 99                 .n_8255         = 1,
100         },
101         [BOARD_ADLINK_PCI7248] = {
102                 .name           = "adl_pci-7248",
103                 .dio_badr       = 2,
104                 .n_8255         = 2,
105         },
106         [BOARD_ADLINK_PCI7296] = {
107                 .name           = "adl_pci-7296",
108                 .dio_badr       = 2,
109                 .n_8255         = 4,
110         },
111         [BOARD_CB_PCIDIO24] = {
112                 .name           = "cb_pci-dio24",
113                 .dio_badr       = 2,
114                 .n_8255         = 1,
115         },
116         [BOARD_CB_PCIDIO24H] = {
117                 .name           = "cb_pci-dio24h",
118                 .dio_badr       = 2,
119                 .n_8255         = 1,
120         },
121         [BOARD_CB_PCIDIO48H_OLD] = {
122                 .name           = "cb_pci-dio48h",
123                 .dio_badr       = 1,
124                 .n_8255         = 2,
125         },
126         [BOARD_CB_PCIDIO48H_NEW] = {
127                 .name           = "cb_pci-dio48h",
128                 .dio_badr       = 2,
129                 .n_8255         = 2,
130         },
131         [BOARD_CB_PCIDIO96H] = {
132                 .name           = "cb_pci-dio96h",
133                 .dio_badr       = 2,
134                 .n_8255         = 4,
135         },
136         [BOARD_NI_PCIDIO96] = {
137                 .name           = "ni_pci-dio-96",
138                 .dio_badr       = 1,
139                 .n_8255         = 4,
140                 .has_mite       = 1,
141         },
142         [BOARD_NI_PCIDIO96B] = {
143                 .name           = "ni_pci-dio-96b",
144                 .dio_badr       = 1,
145                 .n_8255         = 4,
146                 .has_mite       = 1,
147         },
148         [BOARD_NI_PXI6508] = {
149                 .name           = "ni_pxi-6508",
150                 .dio_badr       = 1,
151                 .n_8255         = 4,
152                 .has_mite       = 1,
153         },
154         [BOARD_NI_PCI6503] = {
155                 .name           = "ni_pci-6503",
156                 .dio_badr       = 1,
157                 .n_8255         = 1,
158                 .has_mite       = 1,
159         },
160         [BOARD_NI_PCI6503B] = {
161                 .name           = "ni_pci-6503b",
162                 .dio_badr       = 1,
163                 .n_8255         = 1,
164                 .has_mite       = 1,
165         },
166         [BOARD_NI_PCI6503X] = {
167                 .name           = "ni_pci-6503x",
168                 .dio_badr       = 1,
169                 .n_8255         = 1,
170                 .has_mite       = 1,
171         },
172         [BOARD_NI_PXI_6503] = {
173                 .name           = "ni_pxi-6503",
174                 .dio_badr       = 1,
175                 .n_8255         = 1,
176                 .has_mite       = 1,
177         },
178 };
179 
180 /* ripped from mite.h and mite_setup2() to avoid mite dependency */
181 #define MITE_IODWBSR    0xc0     /* IO Device Window Base Size Register */
182 #define WENAB           (1 << 7) /* window enable */
183 
184 static int pci_8255_mite_init(struct pci_dev *pcidev)
185 {
186         void __iomem *mite_base;
187         u32 main_phys_addr;
188 
189         /* ioremap the MITE registers (BAR 0) temporarily */
190         mite_base = pci_ioremap_bar(pcidev, 0);
191         if (!mite_base)
192                 return -ENOMEM;
193 
194         /* set data window to main registers (BAR 1) */
195         main_phys_addr = pci_resource_start(pcidev, 1);
196         writel(main_phys_addr | WENAB, mite_base + MITE_IODWBSR);
197 
198         /* finished with MITE registers */
199         iounmap(mite_base);
200         return 0;
201 }
202 
203 static int pci_8255_auto_attach(struct comedi_device *dev,
204                                 unsigned long context)
205 {
206         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
207         const struct pci_8255_boardinfo *board = NULL;
208         struct comedi_subdevice *s;
209         int ret;
210         int i;
211 
212         if (context < ARRAY_SIZE(pci_8255_boards))
213                 board = &pci_8255_boards[context];
214         if (!board)
215                 return -ENODEV;
216         dev->board_ptr = board;
217         dev->board_name = board->name;
218 
219         ret = comedi_pci_enable(dev);
220         if (ret)
221                 return ret;
222 
223         if (board->has_mite) {
224                 ret = pci_8255_mite_init(pcidev);
225                 if (ret)
226                         return ret;
227         }
228 
229         if ((pci_resource_flags(pcidev, board->dio_badr) & IORESOURCE_MEM)) {
230                 dev->mmio = pci_ioremap_bar(pcidev, board->dio_badr);
231                 if (!dev->mmio)
232                         return -ENOMEM;
233         } else {
234                 dev->iobase = pci_resource_start(pcidev, board->dio_badr);
235         }
236 
237         /*
238          * One, two, or four subdevices are setup by this driver depending
239          * on the number of channels provided by the board. Each subdevice
240          * has 24 channels supported by the 8255 module.
241          */
242         ret = comedi_alloc_subdevices(dev, board->n_8255);
243         if (ret)
244                 return ret;
245 
246         for (i = 0; i < board->n_8255; i++) {
247                 s = &dev->subdevices[i];
248                 if (dev->mmio)
249                         ret = subdev_8255_mm_init(dev, s, NULL, i * I8255_SIZE);
250                 else
251                         ret = subdev_8255_init(dev, s, NULL, i * I8255_SIZE);
252                 if (ret)
253                         return ret;
254         }
255 
256         return 0;
257 }
258 
259 static struct comedi_driver pci_8255_driver = {
260         .driver_name    = "8255_pci",
261         .module         = THIS_MODULE,
262         .auto_attach    = pci_8255_auto_attach,
263         .detach         = comedi_pci_detach,
264 };
265 
266 static int pci_8255_pci_probe(struct pci_dev *dev,
267                               const struct pci_device_id *id)
268 {
269         return comedi_pci_auto_config(dev, &pci_8255_driver, id->driver_data);
270 }
271 
272 static const struct pci_device_id pci_8255_pci_table[] = {
273         { PCI_VDEVICE(ADLINK, 0x7224), BOARD_ADLINK_PCI7224 },
274         { PCI_VDEVICE(ADLINK, 0x7248), BOARD_ADLINK_PCI7248 },
275         { PCI_VDEVICE(ADLINK, 0x7296), BOARD_ADLINK_PCI7296 },
276         { PCI_VDEVICE(CB, 0x0028), BOARD_CB_PCIDIO24 },
277         { PCI_VDEVICE(CB, 0x0014), BOARD_CB_PCIDIO24H },
278         { PCI_DEVICE_SUB(PCI_VENDOR_ID_CB, 0x000b, 0x0000, 0x0000),
279           .driver_data = BOARD_CB_PCIDIO48H_OLD },
280         { PCI_DEVICE_SUB(PCI_VENDOR_ID_CB, 0x000b, PCI_VENDOR_ID_CB, 0x000b),
281           .driver_data = BOARD_CB_PCIDIO48H_NEW },
282         { PCI_VDEVICE(CB, 0x0017), BOARD_CB_PCIDIO96H },
283         { PCI_VDEVICE(NI, 0x0160), BOARD_NI_PCIDIO96 },
284         { PCI_VDEVICE(NI, 0x1630), BOARD_NI_PCIDIO96B },
285         { PCI_VDEVICE(NI, 0x13c0), BOARD_NI_PXI6508 },
286         { PCI_VDEVICE(NI, 0x0400), BOARD_NI_PCI6503 },
287         { PCI_VDEVICE(NI, 0x1250), BOARD_NI_PCI6503B },
288         { PCI_VDEVICE(NI, 0x17d0), BOARD_NI_PCI6503X },
289         { PCI_VDEVICE(NI, 0x1800), BOARD_NI_PXI_6503 },
290         { 0 }
291 };
292 MODULE_DEVICE_TABLE(pci, pci_8255_pci_table);
293 
294 static struct pci_driver pci_8255_pci_driver = {
295         .name           = "8255_pci",
296         .id_table       = pci_8255_pci_table,
297         .probe          = pci_8255_pci_probe,
298         .remove         = comedi_pci_auto_unconfig,
299 };
300 module_comedi_pci_driver(pci_8255_driver, pci_8255_pci_driver);
301 
302 MODULE_DESCRIPTION("COMEDI - Generic PCI based 8255 Digital I/O boards");
303 MODULE_AUTHOR("Comedi http://www.comedi.org");
304 MODULE_LICENSE("GPL");
305 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us