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
55 static int __devinit 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
61 rc = pci_enable_device(pdev);
62 if (rc) {
63 dev_err(&pdev->dev, "Device enable FAILED\n");
64 goto out;
65 }
66
67 rc = pci_request_regions(pdev, "jsm");
68 if (rc) {
69 dev_err(&pdev->dev, "pci_request_region FAILED\n");
70 goto out_disable_device;
71 }
72
73 brd = kzalloc(sizeof(struct jsm_board), GFP_KERNEL);
74 if (!brd) {
75 dev_err(&pdev->dev,
76 "memory allocation for board structure failed\n");
77 rc = -ENOMEM;
78 goto out_release_regions;
79 }
80
81 /* store the info for the board we've found */
82 brd->boardnum = adapter_count++;
83 brd->pci_dev = pdev;
84 if (pdev->device == PCIE_DEVICE_ID_NEO_4_IBM)
85 brd->maxports = 4;
86 else if (pdev->device == PCI_DEVICE_ID_DIGI_NEO_8)
87 brd->maxports = 8;
88 else
89 brd->maxports = 2;
90
91 spin_lock_init(&brd->bd_intr_lock);
92
93 /* store which revision we have */
94 brd->rev = pdev->revision;
95
96 brd->irq = pdev->irq;
97
98 jsm_printk(INIT, INFO, &brd->pci_dev,
99 "jsm_found_board - NEO adapter\n");
100
101 /* get the PCI Base Address Registers */
102 brd->membase = pci_resource_start(pdev, 0);
103 brd->membase_end = pci_resource_end(pdev, 0);
104
105 if (brd->membase & 1)
106 brd->membase &= ~3;
107 else
108 brd->membase &= ~15;
109
110 /* Assign the board_ops struct */
111 brd->bd_ops = &jsm_neo_ops;
112
113 brd->bd_uart_offset = 0x200;
114 brd->bd_dividend = 921600;
115
116 brd->re_map_membase = ioremap(brd->membase, 0x1000);
117 if (!brd->re_map_membase) {
118 dev_err(&pdev->dev,
119 "card has no PCI Memory resources, "
120 "failing board.\n");
121 rc = -ENOMEM;
122 goto out_kfree_brd;
123 }
124
125 rc = request_irq(brd->irq, brd->bd_ops->intr,
126 IRQF_DISABLED|IRQF_SHARED, "JSM", brd);
127 if (rc) {
128 printk(KERN_WARNING "Failed to hook IRQ %d\n",brd->irq);
129 goto out_iounmap;
130 }
131
132 rc = jsm_tty_init(brd);
133 if (rc < 0) {
134 dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc);
135 rc = -ENXIO;
136 goto out_free_irq;
137 }
138
139 rc = jsm_uart_port_init(brd);
140 if (rc < 0) {
141 /* XXX: leaking all resources from jsm_tty_init here! */
142 dev_err(&pdev->dev, "Can't init uart port (%d)\n", rc);
143 rc = -ENXIO;
144 goto out_free_irq;
145 }
146
147 /* Log the information about the board */
148 dev_info(&pdev->dev, "board %d: Digi Neo (rev %d), irq %d\n",
149 adapter_count, brd->rev, brd->irq);
150
151 /*
152 * allocate flip buffer for board.
153 *
154 * Okay to malloc with GFP_KERNEL, we are not at interrupt
155 * context, and there are no locks held.
156 */
157 brd->flipbuf = kzalloc(MYFLIPLEN, GFP_KERNEL);
158 if (!brd->flipbuf) {
159 /* XXX: leaking all resources from jsm_tty_init and
160 jsm_uart_port_init here! */
161 dev_err(&pdev->dev, "memory allocation for flipbuf failed\n");
162 rc = -ENOMEM;
163 goto out_free_irq;
164 }
165
166 pci_set_drvdata(pdev, brd);
167
168 return 0;
169 out_free_irq:
170 free_irq(brd->irq, brd);
171 out_iounmap:
172 iounmap(brd->re_map_membase);
173 out_kfree_brd:
174 kfree(brd);
175 out_release_regions:
176 pci_release_regions(pdev);
177 out_disable_device:
178 pci_disable_device(pdev);
179 out:
180 return rc;
181 }
182
183 static void __devexit jsm_remove_one(struct pci_dev *pdev)
184 {
185 struct jsm_board *brd = pci_get_drvdata(pdev);
186 int i = 0;
187
188 jsm_remove_uart_port(brd);
189
190 free_irq(brd->irq, brd);
191 iounmap(brd->re_map_membase);
192
193 /* Free all allocated channels structs */
194 for (i = 0; i < brd->maxports; i++) {
195 if (brd->channels[i]) {
196 kfree(brd->channels[i]->ch_rqueue);
197 kfree(brd->channels[i]->ch_equeue);
198 kfree(brd->channels[i]->ch_wqueue);
199 kfree(brd->channels[i]);
200 }
201 }
202
203 pci_release_regions(pdev);
204 pci_disable_device(pdev);
205 kfree(brd->flipbuf);
206 kfree(brd);
207 }
208
209 static struct pci_device_id jsm_pci_tbl[] = {
210 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 },
211 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 },
212 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 },
213 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45PRI), 0, 0, 3 },
214 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4_IBM), 0, 0, 4 },
215 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_DIGI_NEO_8), 0, 0, 5 },
216 { 0, }
217 };
218 MODULE_DEVICE_TABLE(pci, jsm_pci_tbl);
219
220 static struct pci_driver jsm_driver = {
221 .name = "jsm",
222 .id_table = jsm_pci_tbl,
223 .probe = jsm_probe_one,
224 .remove = __devexit_p(jsm_remove_one),
225 };
226
227 static int __init jsm_init_module(void)
228 {
229 int rc;
230
231 rc = uart_register_driver(&jsm_uart_driver);
232 if (!rc) {
233 rc = pci_register_driver(&jsm_driver);
234 if (rc)
235 uart_unregister_driver(&jsm_uart_driver);
236 }
237 return rc;
238 }
239
240 static void __exit jsm_exit_module(void)
241 {
242 pci_unregister_driver(&jsm_driver);
243 uart_unregister_driver(&jsm_uart_driver);
244 }
245
246 module_init(jsm_init_module);
247 module_exit(jsm_exit_module);
248
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