Merge master.kernel.org:/pub/scm/linux/kernel/git/dwmw2/audit-2.6
[linux-2.6] / drivers / serial / jsm / jsm_driver.c
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.ltcfwd.linux.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 int jsm_rawreadok;
53 module_param(jsm_debug, int, 0);
54 module_param(jsm_rawreadok, int, 0);
55 MODULE_PARM_DESC(jsm_debug, "Driver debugging level");
56 MODULE_PARM_DESC(jsm_rawreadok, "Bypass flip buffers on input");
57
58 static int jsm_probe_one(struct pci_dev *pdev, const struct pci_device_id *ent)
59 {
60         int rc = 0;
61         struct jsm_board *brd;
62         static int adapter_count = 0;
63         int retval;
64
65         rc = pci_enable_device(pdev);
66         if (rc) {
67                 dev_err(&pdev->dev, "Device enable FAILED\n");
68                 goto out;
69         }
70
71         rc = pci_request_regions(pdev, "jsm");
72         if (rc) {
73                 dev_err(&pdev->dev, "pci_request_region FAILED\n");
74                 goto out_disable_device;
75         }
76
77         brd = kmalloc(sizeof(struct jsm_board), GFP_KERNEL);
78         if (!brd) {
79                 dev_err(&pdev->dev,
80                         "memory allocation for board structure failed\n");
81                 rc = -ENOMEM;
82                 goto out_release_regions;
83         }
84         memset(brd, 0, sizeof(struct jsm_board));
85
86         /* store the info for the board we've found */
87         brd->boardnum = adapter_count++;
88         brd->pci_dev = pdev;
89         brd->maxports = 2;
90
91         spin_lock_init(&brd->bd_lock);
92         spin_lock_init(&brd->bd_intr_lock);
93
94         /* store which revision we have */
95         pci_read_config_byte(pdev, PCI_REVISION_ID, &brd->rev);
96
97         brd->irq = pdev->irq;
98
99         jsm_printk(INIT, INFO, &brd->pci_dev,
100                 "jsm_found_board - NEO adapter\n");
101
102         /* get the PCI Base Address Registers */
103         brd->membase    = pci_resource_start(pdev, 0);
104         brd->membase_end = pci_resource_end(pdev, 0);
105
106         if (brd->membase & 1)
107                 brd->membase &= ~3;
108         else
109                 brd->membase &= ~15;
110
111         /* Assign the board_ops struct */
112         brd->bd_ops = &jsm_neo_ops;
113
114         brd->bd_uart_offset = 0x200;
115         brd->bd_dividend = 921600;
116
117         brd->re_map_membase = ioremap(brd->membase, 0x1000);
118         if (!brd->re_map_membase) {
119                 dev_err(&pdev->dev,
120                         "card has no PCI Memory resources, "
121                         "failing board.\n");
122                 rc = -ENOMEM;
123                 goto out_kfree_brd;
124         }
125
126         rc = request_irq(brd->irq, brd->bd_ops->intr,
127                         SA_INTERRUPT|SA_SHIRQ, "JSM", brd);
128         if (rc) {
129                 printk(KERN_WARNING "Failed to hook IRQ %d\n",brd->irq);
130                 goto out_iounmap;
131         }
132
133         rc = jsm_tty_init(brd);
134         if (rc < 0) {
135                 dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc);
136                 retval = -ENXIO;
137                 goto out_free_irq;
138         }
139
140         rc = jsm_uart_port_init(brd);
141         if (rc < 0) {
142                 /* XXX: leaking all resources from jsm_tty_init here! */
143                 dev_err(&pdev->dev, "Can't init uart port (%d)\n", rc);
144                 retval = -ENXIO;
145                 goto out_free_irq;
146         }
147
148         /* Log the information about the board */
149         dev_info(&pdev->dev, "board %d: Digi Neo (rev %d), irq %d\n",
150                         adapter_count, brd->rev, brd->irq);
151
152         /*
153          * allocate flip buffer for board.
154          *
155          * Okay to malloc with GFP_KERNEL, we are not at interrupt
156          * context, and there are no locks held.
157          */
158         brd->flipbuf = kmalloc(MYFLIPLEN, GFP_KERNEL);
159         if (!brd->flipbuf) {
160                 /* XXX: leaking all resources from jsm_tty_init and
161                         jsm_uart_port_init here! */
162                 dev_err(&pdev->dev, "memory allocation for flipbuf failed\n");
163                 retval = -ENOMEM;
164                 goto out_free_irq;
165         }
166         memset(brd->flipbuf, 0, MYFLIPLEN);
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
185 static void 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         { 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);