summaryrefslogtreecommitdiffstats
path: root/kernel/drivers/tty/serial/jsm/jsm_driver.c
blob: efbd87a76656eef11068097832101c86d59f6c5e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
/************************************************************************
 * Copyright 2003 Digi International (www.digi.com)
 *
 * Copyright (C) 2004 IBM Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE.  See the GNU General Public License for more details.
 *
 * Contact Information:
 * Scott H Kilau <Scott_Kilau@digi.com>
 * Wendy Xiong   <wendyx@us.ibm.com>
 *
 *
 ***********************************************************************/
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/slab.h>

#include "jsm.h"

MODULE_AUTHOR("Digi International, http://www.digi.com");
MODULE_DESCRIPTION("Driver for the Digi International Neo and Classic PCI based product line");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("jsm");

#define JSM_DRIVER_NAME "jsm"
#define NR_PORTS	32
#define JSM_MINOR_START	0

struct uart_driver jsm_uart_driver = {
	.owner		= THIS_MODULE,
	.driver_name	= JSM_DRIVER_NAME,
	.dev_name	= "ttyn",
	.major		= 0,
	.minor		= JSM_MINOR_START,
	.nr		= NR_PORTS,
};

static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev,
					pci_channel_state_t state);
static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev);
static void jsm_io_resume(struct pci_dev *pdev);

static const struct pci_error_handlers jsm_err_handler = {
	.error_detected = jsm_io_error_detected,
	.slot_reset = jsm_io_slot_reset,
	.resume = jsm_io_resume,
};

int jsm_debug;
module_param(jsm_debug, int, 0);
MODULE_PARM_DESC(jsm_debug, "Driver debugging level");

static int jsm_probe_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	int rc = 0;
	struct jsm_board *brd;
	static int adapter_count;

	rc = pci_enable_device(pdev);
	if (rc) {
		dev_err(&pdev->dev, "Device enable FAILED\n");
		goto out;
	}

	rc = pci_request_regions(pdev, "jsm");
	if (rc) {
		dev_err(&pdev->dev, "pci_request_region FAILED\n");
		goto out_disable_device;
	}

	brd = kzalloc(sizeof(*brd), GFP_KERNEL);
	if (!brd) {
		rc = -ENOMEM;
		goto out_release_regions;
	}

	/* store the info for the board we've found */
	brd->boardnum = adapter_count++;
	brd->pci_dev = pdev;

	switch (pdev->device) {
	case PCI_DEVICE_ID_NEO_2DB9:
	case PCI_DEVICE_ID_NEO_2DB9PRI:
	case PCI_DEVICE_ID_NEO_2RJ45:
	case PCI_DEVICE_ID_NEO_2RJ45PRI:
	case PCI_DEVICE_ID_NEO_2_422_485:
		brd->maxports = 2;
		break;

	case PCI_DEVICE_ID_CLASSIC_4:
	case PCI_DEVICE_ID_CLASSIC_4_422:
	case PCI_DEVICE_ID_NEO_4:
	case PCIE_DEVICE_ID_NEO_4:
	case PCIE_DEVICE_ID_NEO_4RJ45:
	case PCIE_DEVICE_ID_NEO_4_IBM:
		brd->maxports = 4;
		break;

	case PCI_DEVICE_ID_CLASSIC_8:
	case PCI_DEVICE_ID_CLASSIC_8_422:
	case PCI_DEVICE_ID_DIGI_NEO_8:
	case PCIE_DEVICE_ID_NEO_8:
	case PCIE_DEVICE_ID_NEO_8RJ45:
		brd->maxports = 8;
		break;

	default:
		brd->maxports = 1;
		break;
	}

	spin_lock_init(&brd->bd_intr_lock);

	/* store which revision we have */
	brd->rev = pdev->revision;

	brd->irq = pdev->irq;

	switch (pdev->device) {
	case PCI_DEVICE_ID_CLASSIC_4:
	case PCI_DEVICE_ID_CLASSIC_4_422:
	case PCI_DEVICE_ID_CLASSIC_8:
	case PCI_DEVICE_ID_CLASSIC_8_422:

		jsm_dbg(INIT, &brd->pci_dev,
			"jsm_found_board - Classic adapter\n");

		/*
		 * For PCI ClassicBoards
		 * PCI Local Address (.i.e. "resource" number) space
		 * 0	PLX Memory Mapped Config
		 * 1	PLX I/O Mapped Config
		 * 2	I/O Mapped UARTs and Status
		 * 3	Memory Mapped VPD
		 * 4	Memory Mapped UARTs and Status
		 */

		/* Get the PCI Base Address Registers */
		brd->membase = pci_resource_start(pdev, 4);
		brd->membase_end = pci_resource_end(pdev, 4);

		if (brd->membase & 0x1)
			brd->membase &= ~0x3;
		else
			brd->membase &= ~0xF;

		brd->iobase = pci_resource_start(pdev, 1);
		brd->iobase_end = pci_resource_end(pdev, 1);
		brd->iobase = ((unsigned int)(brd->iobase)) & 0xFFFE;

		/* Assign the board_ops struct */
		brd->bd_ops = &jsm_cls_ops;

		brd->bd_uart_offset = 0x8;
		brd->bd_dividend = 921600;

		brd->re_map_membase = ioremap(brd->membase,
						pci_resource_len(pdev, 4));
		if (!brd->re_map_membase) {
			dev_err(&pdev->dev,
				"Card has no PCI Memory resources, failing board.\n");
			rc = -ENOMEM;
			goto out_kfree_brd;
		}

		/*
		 * Enable Local Interrupt 1			(0x1),
		 * Local Interrupt 1 Polarity Active high	(0x2),
		 * Enable PCI interrupt				(0x43)
		 */
		outb(0x43, brd->iobase + 0x4c);

		break;

	case PCI_DEVICE_ID_NEO_2DB9:
	case PCI_DEVICE_ID_NEO_2DB9PRI:
	case PCI_DEVICE_ID_NEO_2RJ45:
	case PCI_DEVICE_ID_NEO_2RJ45PRI:
	case PCI_DEVICE_ID_NEO_2_422_485:
	case PCI_DEVICE_ID_NEO_4:
	case PCIE_DEVICE_ID_NEO_4:
	case PCIE_DEVICE_ID_NEO_4RJ45:
	case PCIE_DEVICE_ID_NEO_4_IBM:
	case PCI_DEVICE_ID_DIGI_NEO_8:
	case PCIE_DEVICE_ID_NEO_8:
	case PCIE_DEVICE_ID_NEO_8RJ45:

		jsm_dbg(INIT, &brd->pci_dev, "jsm_found_board - NEO adapter\n");

		/* get the PCI Base Address Registers */
		brd->membase	= pci_resource_start(pdev, 0);
		brd->membase_end = pci_resource_end(pdev, 0);

		if (brd->membase & 1)
			brd->membase &= ~0x3;
		else
			brd->membase &= ~0xF;

		/* Assign the board_ops struct */
		brd->bd_ops = &jsm_neo_ops;

		brd->bd_uart_offset = 0x200;
		brd->bd_dividend = 921600;

		brd->re_map_membase = ioremap(brd->membase,
						pci_resource_len(pdev, 0));
		if (!brd->re_map_membase) {
			dev_err(&pdev->dev,
				"Card has no PCI Memory resources, failing board.\n");
			rc = -ENOMEM;
			goto out_kfree_brd;
		}

		break;
	default:
		return -ENXIO;
	}

	rc = request_irq(brd->irq, brd->bd_ops->intr, IRQF_SHARED, "JSM", brd);
	if (rc) {
		dev_warn(&pdev->dev, "Failed to hook IRQ %d\n", brd->irq);
		goto out_iounmap;
	}

	rc = jsm_tty_init(brd);
	if (rc < 0) {
		dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc);
		rc = -ENXIO;
		goto out_free_irq;
	}

	rc = jsm_uart_port_init(brd);
	if (rc < 0) {
		/* XXX: leaking all resources from jsm_tty_init here! */
		dev_err(&pdev->dev, "Can't init uart port (%d)\n", rc);
		rc = -ENXIO;
		goto out_free_irq;
	}

	/* Log the information about the board */
	dev_info(&pdev->dev, "board %d: Digi Classic/Neo (rev %d), irq %d\n",
			adapter_count, brd->rev, brd->irq);

	pci_set_drvdata(pdev, brd);
	pci_save_state(pdev);

	return 0;
 out_free_irq:
	jsm_remove_uart_port(brd);
	free_irq(brd->irq, brd);
 out_iounmap:
	iounmap(brd->re_map_membase);
 out_kfree_brd:
	kfree(brd);
 out_release_regions:
	pci_release_regions(pdev);
 out_disable_device:
	pci_disable_device(pdev);
 out:
	return rc;
}

static void jsm_remove_one(struct pci_dev *pdev)
{
	struct jsm_board *brd = pci_get_drvdata(pdev);
	int i = 0;

	switch (pdev->device) {
	case PCI_DEVICE_ID_CLASSIC_4:
	case PCI_DEVICE_ID_CLASSIC_4_422:
	case PCI_DEVICE_ID_CLASSIC_8:
	case PCI_DEVICE_ID_CLASSIC_8_422:
		/* Tell card not to interrupt anymore. */
		outb(0x0, brd->iobase + 0x4c);
		break;
	default:
		break;
	}

	jsm_remove_uart_port(brd);

	free_irq(brd->irq, brd);
	iounmap(brd->re_map_membase);

	/* Free all allocated channels structs */
	for (i = 0; i < brd->maxports; i++) {
		if (brd->channels[i]) {
			kfree(brd->channels[i]->ch_rqueue);
			kfree(brd->channels[i]->ch_equeue);
			kfree(brd->channels[i]);
		}
	}

	pci_release_regions(pdev);
	pci_disable_device(pdev);
	kfree(brd);
}

static struct pci_device_id jsm_pci_tbl[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 },
	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 },
	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 },
	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45PRI), 0, 0, 3 },
	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4_IBM), 0, 0, 4 },
	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_DIGI_NEO_8), 0, 0, 5 },
	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_4), 0, 0, 6 },
	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_1_422), 0, 0, 7 },
	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_1_422_485), 0, 0, 8 },
	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2_422_485), 0, 0, 9 },
	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_8), 0, 0, 10 },
	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4), 0, 0, 11 },
	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4RJ45), 0, 0, 12 },
	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_8RJ45), 0, 0, 13 },
	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_CLASSIC_4), 0, 0, 14 },
	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_CLASSIC_4_422), 0, 0, 15 },
	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_CLASSIC_8), 0, 0, 16 },
	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_CLASSIC_8_422), 0, 0, 17 },
	{ 0, }
};
MODULE_DEVICE_TABLE(pci, jsm_pci_tbl);

static struct pci_driver jsm_driver = {
	.name		= "jsm",
	.id_table	= jsm_pci_tbl,
	.probe		= jsm_probe_one,
	.remove		= jsm_remove_one,
	.err_handler    = &jsm_err_handler,
};

static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev,
					pci_channel_state_t state)
{
	struct jsm_board *brd = pci_get_drvdata(pdev);

	jsm_remove_uart_port(brd);

	return PCI_ERS_RESULT_NEED_RESET;
}

static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev)
{
	int rc;

	rc = pci_enable_device(pdev);

	if (rc)
		return PCI_ERS_RESULT_DISCONNECT;

	pci_set_master(pdev);

	return PCI_ERS_RESULT_RECOVERED;
}

static void jsm_io_resume(struct pci_dev *pdev)
{
	struct jsm_board *brd = pci_get_drvdata(pdev);

	pci_restore_state(pdev);
	pci_save_state(pdev);

	jsm_uart_port_init(brd);
}

static int __init jsm_init_module(void)
{
	int rc;

	rc = uart_register_driver(&jsm_uart_driver);
	if (!rc) {
		rc = pci_register_driver(&jsm_driver);
		if (rc)
			uart_unregister_driver(&jsm_uart_driver);
	}
	return rc;
}

static void __exit jsm_exit_module(void)
{
	pci_unregister_driver(&jsm_driver);
	uart_unregister_driver(&jsm_uart_driver);
}

module_init(jsm_init_module);
module_exit(jsm_exit_module);