1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * COMEDI driver for generic PCI based 8255 digital i/o boards
4 * Copyright (C) 2012 H Hartley Sweeten <hsweeten@visionengravers.com>
5 *
6 * Based on the tested adl_pci7296 driver written by:
7 * Jon Grierson <jd@renko.co.uk>
8 * and the experimental cb_pcidio driver written by:
9 * Yoshiya Matsuzaka
10 *
11 * COMEDI - Linux Control and Measurement Device Interface
12 * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
13 */
14
15 /*
16 * Driver: 8255_pci
17 * Description: Generic PCI based 8255 Digital I/O boards
18 * Devices: [ADLink] PCI-7224 (adl_pci-7224), PCI-7248 (adl_pci-7248),
19 * PCI-7296 (adl_pci-7296),
20 * [Measurement Computing] PCI-DIO24 (cb_pci-dio24),
21 * PCI-DIO24H (cb_pci-dio24h), PCI-DIO48H (cb_pci-dio48h),
22 * PCI-DIO96H (cb_pci-dio96h),
23 * [National Instruments] PCI-DIO-96 (ni_pci-dio-96),
24 * PCI-DIO-96B (ni_pci-dio-96b), PXI-6508 (ni_pxi-6508),
25 * PCI-6503 (ni_pci-6503), PCI-6503B (ni_pci-6503b),
26 * PCI-6503X (ni_pci-6503x), PXI-6503 (ni_pxi-6503)
27 * Author: H Hartley Sweeten <hsweeten@visionengravers.com>
28 * Updated: Wed, 12 Sep 2012 11:52:01 -0700
29 * Status: untested
30 *
31 * These boards have one or more 8255 digital I/O chips, each of which
32 * is supported as a separate 24-channel DIO subdevice.
33 *
34 * Boards with 24 DIO channels (1 DIO subdevice):
35 *
36 * PCI-7224, PCI-DIO24, PCI-DIO24H, PCI-6503, PCI-6503B, PCI-6503X,
37 * PXI-6503
38 *
39 * Boards with 48 DIO channels (2 DIO subdevices):
40 *
41 * PCI-7248, PCI-DIO48H
42 *
43 * Boards with 96 DIO channels (4 DIO subdevices):
44 *
45 * PCI-7296, PCI-DIO96H, PCI-DIO-96, PCI-DIO-96B, PXI-6508
46 *
47 * Some of these boards also have an 8254 programmable timer/counter
48 * chip. This chip is not currently supported by this driver.
49 *
50 * Interrupt support for these boards is also not currently supported.
51 *
52 * Configuration Options: not applicable, uses PCI auto config.
53 */
54
55 #include <linux/module.h>
56 #include <linux/comedi/comedi_pci.h>
57 #include <linux/comedi/comedi_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_OLD,
66 BOARD_CB_PCIDIO48H_NEW,
67 BOARD_CB_PCIDIO96H,
68 BOARD_NI_PCIDIO96,
69 BOARD_NI_PCIDIO96B,
70 BOARD_NI_PXI6508,
71 BOARD_NI_PCI6503,
72 BOARD_NI_PCI6503B,
73 BOARD_NI_PCI6503X,
74 BOARD_NI_PXI_6503,
75 };
76
77 struct pci_8255_boardinfo {
78 const char *name;
79 int dio_badr;
80 int n_8255;
81 unsigned int has_mite:1;
82 };
83
84 static const struct pci_8255_boardinfo pci_8255_boards[] = {
85 [BOARD_ADLINK_PCI7224] = {
86 .name = "adl_pci-7224",
87 .dio_badr = 2,
88 .n_8255 = 1,
89 },
90 [BOARD_ADLINK_PCI7248] = {
91 .name = "adl_pci-7248",
92 .dio_badr = 2,
93 .n_8255 = 2,
94 },
95 [BOARD_ADLINK_PCI7296] = {
96 .name = "adl_pci-7296",
97 .dio_badr = 2,
98 .n_8255 = 4,
99 },
100 [BOARD_CB_PCIDIO24] = {
101 .name = "cb_pci-dio24",
102 .dio_badr = 2,
103 .n_8255 = 1,
104 },
105 [BOARD_CB_PCIDIO24H] = {
106 .name = "cb_pci-dio24h",
107 .dio_badr = 2,
108 .n_8255 = 1,
109 },
110 [BOARD_CB_PCIDIO48H_OLD] = {
111 .name = "cb_pci-dio48h",
112 .dio_badr = 1,
113 .n_8255 = 2,
114 },
115 [BOARD_CB_PCIDIO48H_NEW] = {
116 .name = "cb_pci-dio48h",
117 .dio_badr = 2,
118 .n_8255 = 2,
119 },
120 [BOARD_CB_PCIDIO96H] = {
121 .name = "cb_pci-dio96h",
122 .dio_badr = 2,
123 .n_8255 = 4,
124 },
125 [BOARD_NI_PCIDIO96] = {
126 .name = "ni_pci-dio-96",
127 .dio_badr = 1,
128 .n_8255 = 4,
129 .has_mite = 1,
130 },
131 [BOARD_NI_PCIDIO96B] = {
132 .name = "ni_pci-dio-96b",
133 .dio_badr = 1,
134 .n_8255 = 4,
135 .has_mite = 1,
136 },
137 [BOARD_NI_PXI6508] = {
138 .name = "ni_pxi-6508",
139 .dio_badr = 1,
140 .n_8255 = 4,
141 .has_mite = 1,
142 },
143 [BOARD_NI_PCI6503] = {
144 .name = "ni_pci-6503",
145 .dio_badr = 1,
146 .n_8255 = 1,
147 .has_mite = 1,
148 },
149 [BOARD_NI_PCI6503B] = {
150 .name = "ni_pci-6503b",
151 .dio_badr = 1,
152 .n_8255 = 1,
153 .has_mite = 1,
154 },
155 [BOARD_NI_PCI6503X] = {
156 .name = "ni_pci-6503x",
157 .dio_badr = 1,
158 .n_8255 = 1,
159 .has_mite = 1,
160 },
161 [BOARD_NI_PXI_6503] = {
162 .name = "ni_pxi-6503",
163 .dio_badr = 1,
164 .n_8255 = 1,
165 .has_mite = 1,
166 },
167 };
168
169 /* ripped from mite.h and mite_setup2() to avoid mite dependency */
170 #define MITE_IODWBSR 0xc0 /* IO Device Window Base Size Register */
171 #define WENAB BIT(7) /* window enable */
172
pci_8255_mite_init(struct pci_dev * pcidev)173 static int pci_8255_mite_init(struct pci_dev *pcidev)
174 {
175 void __iomem *mite_base;
176 u32 main_phys_addr;
177
178 /* ioremap the MITE registers (BAR 0) temporarily */
179 mite_base = pci_ioremap_bar(pcidev, 0);
180 if (!mite_base)
181 return -ENOMEM;
182
183 /* set data window to main registers (BAR 1) */
184 main_phys_addr = pci_resource_start(pcidev, 1);
185 writel(main_phys_addr | WENAB, mite_base + MITE_IODWBSR);
186
187 /* finished with MITE registers */
188 iounmap(mite_base);
189 return 0;
190 }
191
pci_8255_auto_attach(struct comedi_device * dev,unsigned long context)192 static int pci_8255_auto_attach(struct comedi_device *dev,
193 unsigned long context)
194 {
195 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
196 const struct pci_8255_boardinfo *board = NULL;
197 struct comedi_subdevice *s;
198 int ret;
199 int i;
200
201 if (context < ARRAY_SIZE(pci_8255_boards))
202 board = &pci_8255_boards[context];
203 if (!board)
204 return -ENODEV;
205 dev->board_ptr = board;
206 dev->board_name = board->name;
207
208 ret = comedi_pci_enable(dev);
209 if (ret)
210 return ret;
211
212 if (board->has_mite) {
213 ret = pci_8255_mite_init(pcidev);
214 if (ret)
215 return ret;
216 }
217
218 if ((pci_resource_flags(pcidev, board->dio_badr) & IORESOURCE_MEM)) {
219 dev->mmio = pci_ioremap_bar(pcidev, board->dio_badr);
220 if (!dev->mmio)
221 return -ENOMEM;
222 } else {
223 dev->iobase = pci_resource_start(pcidev, board->dio_badr);
224 }
225
226 /*
227 * One, two, or four subdevices are setup by this driver depending
228 * on the number of channels provided by the board. Each subdevice
229 * has 24 channels supported by the 8255 module.
230 */
231 ret = comedi_alloc_subdevices(dev, board->n_8255);
232 if (ret)
233 return ret;
234
235 for (i = 0; i < board->n_8255; i++) {
236 s = &dev->subdevices[i];
237 if (dev->mmio)
238 ret = subdev_8255_mm_init(dev, s, NULL, i * I8255_SIZE);
239 else
240 ret = subdev_8255_init(dev, s, NULL, i * I8255_SIZE);
241 if (ret)
242 return ret;
243 }
244
245 return 0;
246 }
247
248 static struct comedi_driver pci_8255_driver = {
249 .driver_name = "8255_pci",
250 .module = THIS_MODULE,
251 .auto_attach = pci_8255_auto_attach,
252 .detach = comedi_pci_detach,
253 };
254
pci_8255_pci_probe(struct pci_dev * dev,const struct pci_device_id * id)255 static int pci_8255_pci_probe(struct pci_dev *dev,
256 const struct pci_device_id *id)
257 {
258 return comedi_pci_auto_config(dev, &pci_8255_driver, id->driver_data);
259 }
260
261 static const struct pci_device_id pci_8255_pci_table[] = {
262 { PCI_VDEVICE(ADLINK, 0x7224), BOARD_ADLINK_PCI7224 },
263 { PCI_VDEVICE(ADLINK, 0x7248), BOARD_ADLINK_PCI7248 },
264 { PCI_VDEVICE(ADLINK, 0x7296), BOARD_ADLINK_PCI7296 },
265 { PCI_VDEVICE(CB, 0x0028), BOARD_CB_PCIDIO24 },
266 { PCI_VDEVICE(CB, 0x0014), BOARD_CB_PCIDIO24H },
267 { PCI_DEVICE_SUB(PCI_VENDOR_ID_CB, 0x000b, 0x0000, 0x0000),
268 .driver_data = BOARD_CB_PCIDIO48H_OLD },
269 { PCI_DEVICE_SUB(PCI_VENDOR_ID_CB, 0x000b, PCI_VENDOR_ID_CB, 0x000b),
270 .driver_data = BOARD_CB_PCIDIO48H_NEW },
271 { PCI_VDEVICE(CB, 0x0017), BOARD_CB_PCIDIO96H },
272 { PCI_VDEVICE(NI, 0x0160), BOARD_NI_PCIDIO96 },
273 { PCI_VDEVICE(NI, 0x1630), BOARD_NI_PCIDIO96B },
274 { PCI_VDEVICE(NI, 0x13c0), BOARD_NI_PXI6508 },
275 { PCI_VDEVICE(NI, 0x0400), BOARD_NI_PCI6503 },
276 { PCI_VDEVICE(NI, 0x1250), BOARD_NI_PCI6503B },
277 { PCI_VDEVICE(NI, 0x17d0), BOARD_NI_PCI6503X },
278 { PCI_VDEVICE(NI, 0x1800), BOARD_NI_PXI_6503 },
279 { 0 }
280 };
281 MODULE_DEVICE_TABLE(pci, pci_8255_pci_table);
282
283 static struct pci_driver pci_8255_pci_driver = {
284 .name = "8255_pci",
285 .id_table = pci_8255_pci_table,
286 .probe = pci_8255_pci_probe,
287 .remove = comedi_pci_auto_unconfig,
288 };
289 module_comedi_pci_driver(pci_8255_driver, pci_8255_pci_driver);
290
291 MODULE_DESCRIPTION("COMEDI - Generic PCI based 8255 Digital I/O boards");
292 MODULE_AUTHOR("Comedi https://www.comedi.org");
293 MODULE_LICENSE("GPL");
294