1 /************************************************************************
2 * Copyright 2003 Digi International (www.digi.com)
3 *
4 * Copyright (C) 2004 IBM Corporation. All rights reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
9 * any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
13 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
14 * PURPOSE. See the GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 * Temple Place - Suite 330, Boston,
19 * MA 02111-1307, USA.
20 *
21 * Contact Information:
22 * Scott H Kilau <Scott_Kilau@digi.com>
23 * Wendy Xiong <wendyx@us.ibm.com>
24 *
25 *
26 ***********************************************************************/
27 #include <linux/moduleparam.h>
28 #include <linux/pci.h>
29
30 #include "jsm.h"
31
32 MODULE_AUTHOR("Digi International, http://www.digi.com");
33 MODULE_DESCRIPTION("Driver for the Digi International "
34 "Neo PCI based product line");
35 MODULE_LICENSE("GPL");
36 MODULE_SUPPORTED_DEVICE("jsm");
37
38 #define JSM_DRIVER_NAME "jsm"
39 #define NR_PORTS 32
40 #define JSM_MINOR_START 0
41
42 struct uart_driver jsm_uart_driver = {
43 .owner = THIS_MODULE,
44 .driver_name = JSM_DRIVER_NAME,
45 .dev_name = "ttyn",
46 .major = 0,
47 .minor = JSM_MINOR_START,
48 .nr = NR_PORTS,
49 };
50
51 int jsm_debug;
52 module_param(jsm_debug, int, 0);
53 MODULE_PARM_DESC(jsm_debug, "Driver debugging level");
54
jsm_probe_one(struct pci_dev * pdev,const struct pci_device_id * ent)55 static int jsm_probe_one(struct pci_dev *pdev, const struct pci_device_id *ent)
56 {
57 int rc = 0;
58 struct jsm_board *brd;
59 static int adapter_count = 0;
60 int retval;
61
62 rc = pci_enable_device(pdev);
63 if (rc) {
64 dev_err(&pdev->dev, "Device enable FAILED\n");
65 goto out;
66 }
67
68 rc = pci_request_regions(pdev, "jsm");
69 if (rc) {
70 dev_err(&pdev->dev, "pci_request_region FAILED\n");
71 goto out_disable_device;
72 }
73
74 brd = kzalloc(sizeof(struct jsm_board), GFP_KERNEL);
75 if (!brd) {
76 dev_err(&pdev->dev,
77 "memory allocation for board structure failed\n");
78 rc = -ENOMEM;
79 goto out_release_regions;
80 }
81
82 /* store the info for the board we've found */
83 brd->boardnum = adapter_count++;
84 brd->pci_dev = pdev;
85 if (pdev->device == PCIE_DEVICE_ID_NEO_4_IBM)
86 brd->maxports = 4;
87 else if (pdev->device == PCI_DEVICE_ID_DIGI_NEO_8)
88 brd->maxports = 8;
89 else
90 brd->maxports = 2;
91
92 spin_lock_init(&brd->bd_lock);
93 spin_lock_init(&brd->bd_intr_lock);
94
95 /* store which revision we have */
96 brd->rev = pdev->revision;
97
98 brd->irq = pdev->irq;
99
100 jsm_printk(INIT, INFO, &brd->pci_dev,
101 "jsm_found_board - NEO adapter\n");
102
103 /* get the PCI Base Address Registers */
104 brd->membase = pci_resource_start(pdev, 0);
105 brd->membase_end = pci_resource_end(pdev, 0);
106
107 if (brd->membase & 1)
108 brd->membase &= ~3;
109 else
110 brd->membase &= ~15;
111
112 /* Assign the board_ops struct */
113 brd->bd_ops = &jsm_neo_ops;
114
115 brd->bd_uart_offset = 0x200;
116 brd->bd_dividend = 921600;
117
118 brd->re_map_membase = ioremap(brd->membase, 0x1000);
119 if (!brd->re_map_membase) {
120 dev_err(&pdev->dev,
121 "card has no PCI Memory resources, "
122 "failing board.\n");
123 rc = -ENOMEM;
124 goto out_kfree_brd;
125 }
126
127 rc = request_irq(brd->irq, brd->bd_ops->intr,
128 IRQF_DISABLED|IRQF_SHARED, "JSM", brd);
129 if (rc) {
130 printk(KERN_WARNING "Failed to hook IRQ %d\n",brd->irq);
131 goto out_iounmap;
132 }
133
134 rc = jsm_tty_init(brd);
135 if (rc < 0) {
136 dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc);
137 retval = -ENXIO;
138 goto out_free_irq;
139 }
140
141 rc = jsm_uart_port_init(brd);
142 if (rc < 0) {
143 /* XXX: leaking all resources from jsm_tty_init here! */
144 dev_err(&pdev->dev, "Can't init uart port (%d)\n", rc);
145 retval = -ENXIO;
146 goto out_free_irq;
147 }
148
149 /* Log the information about the board */
150 dev_info(&pdev->dev, "board %d: Digi Neo (rev %d), irq %d\n",
151 adapter_count, brd->rev, brd->irq);
152
153 /*
154 * allocate flip buffer for board.
155 *
156 * Okay to malloc with GFP_KERNEL, we are not at interrupt
157 * context, and there are no locks held.
158 */
159 brd->flipbuf = kzalloc(MYFLIPLEN, GFP_KERNEL);
160 if (!brd->flipbuf) {
161 /* XXX: leaking all resources from jsm_tty_init and
162 jsm_uart_port_init here! */
163 dev_err(&pdev->dev, "memory allocation for flipbuf failed\n");
164 retval = -ENOMEM;
165 goto out_free_irq;
166 }
167
168 pci_set_drvdata(pdev, brd);
169
170 return 0;
171 out_free_irq:
172 free_irq(brd->irq, brd);
173 out_iounmap:
174 iounmap(brd->re_map_membase);
175 out_kfree_brd:
176 kfree(brd);
177 out_release_regions:
178 pci_release_regions(pdev);
179 out_disable_device:
180 pci_disable_device(pdev);
181 out:
182 return rc;
183 }
184
jsm_remove_one(struct pci_dev * pdev)185 static void __devexit jsm_remove_one(struct pci_dev *pdev)
186 {
187 struct jsm_board *brd = pci_get_drvdata(pdev);
188 int i = 0;
189
190 jsm_remove_uart_port(brd);
191
192 free_irq(brd->irq, brd);
193 iounmap(brd->re_map_membase);
194
195 /* Free all allocated channels structs */
196 for (i = 0; i < brd->maxports; i++) {
197 if (brd->channels[i]) {
198 kfree(brd->channels[i]->ch_rqueue);
199 kfree(brd->channels[i]->ch_equeue);
200 kfree(brd->channels[i]->ch_wqueue);
201 kfree(brd->channels[i]);
202 }
203 }
204
205 pci_release_regions(pdev);
206 pci_disable_device(pdev);
207 kfree(brd->flipbuf);
208 kfree(brd);
209 }
210
211 static struct pci_device_id jsm_pci_tbl[] = {
212 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 },
213 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 },
214 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 },
215 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45PRI), 0, 0, 3 },
216 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4_IBM), 0, 0, 4 },
217 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_DIGI_NEO_8), 0, 0, 5 },
218 { 0, }
219 };
220 MODULE_DEVICE_TABLE(pci, jsm_pci_tbl);
221
222 static struct pci_driver jsm_driver = {
223 .name = "jsm",
224 .id_table = jsm_pci_tbl,
225 .probe = jsm_probe_one,
226 .remove = __devexit_p(jsm_remove_one),
227 };
228
jsm_init_module(void)229 static int __init jsm_init_module(void)
230 {
231 int rc;
232
233 rc = uart_register_driver(&jsm_uart_driver);
234 if (!rc) {
235 rc = pci_register_driver(&jsm_driver);
236 if (rc)
237 uart_unregister_driver(&jsm_uart_driver);
238 }
239 return rc;
240 }
241
jsm_exit_module(void)242 static void __exit jsm_exit_module(void)
243 {
244 pci_unregister_driver(&jsm_driver);
245 uart_unregister_driver(&jsm_uart_driver);
246 }
247
248 module_init(jsm_init_module);
249 module_exit(jsm_exit_module);
250