1 // SPDX-License-Identifier: GPL-2.0+
2 /************************************************************************
3 * Copyright 2003 Digi International (www.digi.com)
4 *
5 * Copyright (C) 2004 IBM Corporation. All rights reserved.
6 *
7 * Contact Information:
8 * Scott H Kilau <Scott_Kilau@digi.com>
9 * Wendy Xiong <wendyx@us.ibm.com>
10 *
11 *
12 ***********************************************************************/
13 #include <linux/module.h>
14 #include <linux/pci.h>
15 #include <linux/slab.h>
16
17 #include "jsm.h"
18
19 MODULE_AUTHOR("Digi International, https://www.digi.com");
20 MODULE_DESCRIPTION("Driver for the Digi International Neo and Classic PCI based product line");
21 MODULE_LICENSE("GPL");
22 MODULE_SUPPORTED_DEVICE("jsm");
23
24 #define JSM_DRIVER_NAME "jsm"
25 #define NR_PORTS 32
26 #define JSM_MINOR_START 0
27
28 struct uart_driver jsm_uart_driver = {
29 .owner = THIS_MODULE,
30 .driver_name = JSM_DRIVER_NAME,
31 .dev_name = "ttyn",
32 .major = 0,
33 .minor = JSM_MINOR_START,
34 .nr = NR_PORTS,
35 };
36
37 static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev,
38 pci_channel_state_t state);
39 static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev);
40 static void jsm_io_resume(struct pci_dev *pdev);
41
42 static const struct pci_error_handlers jsm_err_handler = {
43 .error_detected = jsm_io_error_detected,
44 .slot_reset = jsm_io_slot_reset,
45 .resume = jsm_io_resume,
46 };
47
48 int jsm_debug;
49 module_param(jsm_debug, int, 0);
50 MODULE_PARM_DESC(jsm_debug, "Driver debugging level");
51
jsm_probe_one(struct pci_dev * pdev,const struct pci_device_id * ent)52 static int jsm_probe_one(struct pci_dev *pdev, const struct pci_device_id *ent)
53 {
54 int rc = 0;
55 struct jsm_board *brd;
56 static int adapter_count;
57
58 rc = pci_enable_device(pdev);
59 if (rc) {
60 dev_err(&pdev->dev, "Device enable FAILED\n");
61 goto out;
62 }
63
64 rc = pci_request_regions(pdev, JSM_DRIVER_NAME);
65 if (rc) {
66 dev_err(&pdev->dev, "pci_request_region FAILED\n");
67 goto out_disable_device;
68 }
69
70 brd = kzalloc(sizeof(*brd), GFP_KERNEL);
71 if (!brd) {
72 rc = -ENOMEM;
73 goto out_release_regions;
74 }
75
76 /* store the info for the board we've found */
77 brd->boardnum = adapter_count++;
78 brd->pci_dev = pdev;
79
80 switch (pdev->device) {
81 case PCI_DEVICE_ID_NEO_2DB9:
82 case PCI_DEVICE_ID_NEO_2DB9PRI:
83 case PCI_DEVICE_ID_NEO_2RJ45:
84 case PCI_DEVICE_ID_NEO_2RJ45PRI:
85 case PCI_DEVICE_ID_NEO_2_422_485:
86 brd->maxports = 2;
87 break;
88
89 case PCI_DEVICE_ID_CLASSIC_4:
90 case PCI_DEVICE_ID_CLASSIC_4_422:
91 case PCI_DEVICE_ID_NEO_4:
92 case PCIE_DEVICE_ID_NEO_4:
93 case PCIE_DEVICE_ID_NEO_4RJ45:
94 case PCIE_DEVICE_ID_NEO_4_IBM:
95 brd->maxports = 4;
96 break;
97
98 case PCI_DEVICE_ID_CLASSIC_8:
99 case PCI_DEVICE_ID_CLASSIC_8_422:
100 case PCI_DEVICE_ID_DIGI_NEO_8:
101 case PCIE_DEVICE_ID_NEO_8:
102 case PCIE_DEVICE_ID_NEO_8RJ45:
103 brd->maxports = 8;
104 break;
105
106 default:
107 brd->maxports = 1;
108 break;
109 }
110
111 spin_lock_init(&brd->bd_intr_lock);
112
113 /* store which revision we have */
114 brd->rev = pdev->revision;
115
116 brd->irq = pdev->irq;
117
118 switch (pdev->device) {
119 case PCI_DEVICE_ID_CLASSIC_4:
120 case PCI_DEVICE_ID_CLASSIC_4_422:
121 case PCI_DEVICE_ID_CLASSIC_8:
122 case PCI_DEVICE_ID_CLASSIC_8_422:
123
124 jsm_dbg(INIT, &brd->pci_dev,
125 "jsm_found_board - Classic adapter\n");
126
127 /*
128 * For PCI ClassicBoards
129 * PCI Local Address (.i.e. "resource" number) space
130 * 0 PLX Memory Mapped Config
131 * 1 PLX I/O Mapped Config
132 * 2 I/O Mapped UARTs and Status
133 * 3 Memory Mapped VPD
134 * 4 Memory Mapped UARTs and Status
135 */
136
137 /* Get the PCI Base Address Registers */
138 brd->membase = pci_resource_start(pdev, 4);
139 brd->membase_end = pci_resource_end(pdev, 4);
140
141 if (brd->membase & 0x1)
142 brd->membase &= ~0x3;
143 else
144 brd->membase &= ~0xF;
145
146 brd->iobase = pci_resource_start(pdev, 1);
147 brd->iobase_end = pci_resource_end(pdev, 1);
148 brd->iobase = ((unsigned int)(brd->iobase)) & 0xFFFE;
149
150 /* Assign the board_ops struct */
151 brd->bd_ops = &jsm_cls_ops;
152
153 brd->bd_uart_offset = 0x8;
154 brd->bd_dividend = 921600;
155
156 brd->re_map_membase = ioremap(brd->membase,
157 pci_resource_len(pdev, 4));
158 if (!brd->re_map_membase) {
159 dev_err(&pdev->dev,
160 "Card has no PCI Memory resources, failing board.\n");
161 rc = -ENOMEM;
162 goto out_kfree_brd;
163 }
164
165 /*
166 * Enable Local Interrupt 1 (0x1),
167 * Local Interrupt 1 Polarity Active high (0x2),
168 * Enable PCI interrupt (0x43)
169 */
170 outb(0x43, brd->iobase + 0x4c);
171
172 break;
173
174 case PCI_DEVICE_ID_NEO_2DB9:
175 case PCI_DEVICE_ID_NEO_2DB9PRI:
176 case PCI_DEVICE_ID_NEO_2RJ45:
177 case PCI_DEVICE_ID_NEO_2RJ45PRI:
178 case PCI_DEVICE_ID_NEO_2_422_485:
179 case PCI_DEVICE_ID_NEO_4:
180 case PCIE_DEVICE_ID_NEO_4:
181 case PCIE_DEVICE_ID_NEO_4RJ45:
182 case PCIE_DEVICE_ID_NEO_4_IBM:
183 case PCI_DEVICE_ID_DIGI_NEO_8:
184 case PCIE_DEVICE_ID_NEO_8:
185 case PCIE_DEVICE_ID_NEO_8RJ45:
186
187 jsm_dbg(INIT, &brd->pci_dev, "jsm_found_board - NEO adapter\n");
188
189 /* get the PCI Base Address Registers */
190 brd->membase = pci_resource_start(pdev, 0);
191 brd->membase_end = pci_resource_end(pdev, 0);
192
193 if (brd->membase & 1)
194 brd->membase &= ~0x3;
195 else
196 brd->membase &= ~0xF;
197
198 /* Assign the board_ops struct */
199 brd->bd_ops = &jsm_neo_ops;
200
201 brd->bd_uart_offset = 0x200;
202 brd->bd_dividend = 921600;
203
204 brd->re_map_membase = ioremap(brd->membase,
205 pci_resource_len(pdev, 0));
206 if (!brd->re_map_membase) {
207 dev_err(&pdev->dev,
208 "Card has no PCI Memory resources, failing board.\n");
209 rc = -ENOMEM;
210 goto out_kfree_brd;
211 }
212
213 break;
214 default:
215 rc = -ENXIO;
216 goto out_kfree_brd;
217 }
218
219 rc = request_irq(brd->irq, brd->bd_ops->intr, IRQF_SHARED, "JSM", brd);
220 if (rc) {
221 dev_warn(&pdev->dev, "Failed to hook IRQ %d\n", brd->irq);
222 goto out_iounmap;
223 }
224
225 rc = jsm_tty_init(brd);
226 if (rc < 0) {
227 dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc);
228 rc = -ENXIO;
229 goto out_free_irq;
230 }
231
232 rc = jsm_uart_port_init(brd);
233 if (rc < 0) {
234 /* XXX: leaking all resources from jsm_tty_init here! */
235 dev_err(&pdev->dev, "Can't init uart port (%d)\n", rc);
236 rc = -ENXIO;
237 goto out_free_irq;
238 }
239
240 /* Log the information about the board */
241 dev_info(&pdev->dev, "board %d: Digi Classic/Neo (rev %d), irq %d\n",
242 adapter_count, brd->rev, brd->irq);
243
244 pci_set_drvdata(pdev, brd);
245 pci_save_state(pdev);
246
247 return 0;
248 out_free_irq:
249 jsm_remove_uart_port(brd);
250 free_irq(brd->irq, brd);
251 out_iounmap:
252 iounmap(brd->re_map_membase);
253 out_kfree_brd:
254 kfree(brd);
255 out_release_regions:
256 pci_release_regions(pdev);
257 out_disable_device:
258 pci_disable_device(pdev);
259 out:
260 return rc;
261 }
262
jsm_remove_one(struct pci_dev * pdev)263 static void jsm_remove_one(struct pci_dev *pdev)
264 {
265 struct jsm_board *brd = pci_get_drvdata(pdev);
266 int i = 0;
267
268 switch (pdev->device) {
269 case PCI_DEVICE_ID_CLASSIC_4:
270 case PCI_DEVICE_ID_CLASSIC_4_422:
271 case PCI_DEVICE_ID_CLASSIC_8:
272 case PCI_DEVICE_ID_CLASSIC_8_422:
273 /* Tell card not to interrupt anymore. */
274 outb(0x0, brd->iobase + 0x4c);
275 break;
276 default:
277 break;
278 }
279
280 jsm_remove_uart_port(brd);
281
282 free_irq(brd->irq, brd);
283 iounmap(brd->re_map_membase);
284
285 /* Free all allocated channels structs */
286 for (i = 0; i < brd->maxports; i++) {
287 if (brd->channels[i]) {
288 kfree(brd->channels[i]->ch_rqueue);
289 kfree(brd->channels[i]->ch_equeue);
290 kfree(brd->channels[i]);
291 }
292 }
293
294 pci_release_regions(pdev);
295 pci_disable_device(pdev);
296 kfree(brd);
297 }
298
299 static const struct pci_device_id jsm_pci_tbl[] = {
300 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 },
301 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 },
302 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 },
303 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45PRI), 0, 0, 3 },
304 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4_IBM), 0, 0, 4 },
305 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_DIGI_NEO_8), 0, 0, 5 },
306 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_4), 0, 0, 6 },
307 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_1_422), 0, 0, 7 },
308 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_1_422_485), 0, 0, 8 },
309 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2_422_485), 0, 0, 9 },
310 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_8), 0, 0, 10 },
311 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4), 0, 0, 11 },
312 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4RJ45), 0, 0, 12 },
313 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_8RJ45), 0, 0, 13 },
314 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_CLASSIC_4), 0, 0, 14 },
315 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_CLASSIC_4_422), 0, 0, 15 },
316 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_CLASSIC_8), 0, 0, 16 },
317 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_CLASSIC_8_422), 0, 0, 17 },
318 { 0, }
319 };
320 MODULE_DEVICE_TABLE(pci, jsm_pci_tbl);
321
322 static struct pci_driver jsm_driver = {
323 .name = JSM_DRIVER_NAME,
324 .id_table = jsm_pci_tbl,
325 .probe = jsm_probe_one,
326 .remove = jsm_remove_one,
327 .err_handler = &jsm_err_handler,
328 };
329
jsm_io_error_detected(struct pci_dev * pdev,pci_channel_state_t state)330 static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev,
331 pci_channel_state_t state)
332 {
333 struct jsm_board *brd = pci_get_drvdata(pdev);
334
335 jsm_remove_uart_port(brd);
336
337 return PCI_ERS_RESULT_NEED_RESET;
338 }
339
jsm_io_slot_reset(struct pci_dev * pdev)340 static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev)
341 {
342 int rc;
343
344 rc = pci_enable_device(pdev);
345
346 if (rc)
347 return PCI_ERS_RESULT_DISCONNECT;
348
349 pci_set_master(pdev);
350
351 return PCI_ERS_RESULT_RECOVERED;
352 }
353
jsm_io_resume(struct pci_dev * pdev)354 static void jsm_io_resume(struct pci_dev *pdev)
355 {
356 struct jsm_board *brd = pci_get_drvdata(pdev);
357
358 pci_restore_state(pdev);
359 pci_save_state(pdev);
360
361 jsm_uart_port_init(brd);
362 }
363
jsm_init_module(void)364 static int __init jsm_init_module(void)
365 {
366 int rc;
367
368 rc = uart_register_driver(&jsm_uart_driver);
369 if (!rc) {
370 rc = pci_register_driver(&jsm_driver);
371 if (rc)
372 uart_unregister_driver(&jsm_uart_driver);
373 }
374 return rc;
375 }
376
jsm_exit_module(void)377 static void __exit jsm_exit_module(void)
378 {
379 pci_unregister_driver(&jsm_driver);
380 uart_unregister_driver(&jsm_uart_driver);
381 }
382
383 module_init(jsm_init_module);
384 module_exit(jsm_exit_module);
385