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1da177e4 LT |
1 | /* $Id: divamnt.c,v 1.32.6.10 2005/02/11 19:40:25 armin Exp $ |
2 | * | |
3 | * Driver for Eicon DIVA Server ISDN cards. | |
4 | * Maint module | |
5 | * | |
6 | * Copyright 2000-2003 by Armin Schindler (mac@melware.de) | |
7 | * Copyright 2000-2003 Cytronics & Melware (info@melware.de) | |
8 | * | |
9 | * This software may be used and distributed according to the terms | |
10 | * of the GNU General Public License, incorporated herein by reference. | |
11 | */ | |
12 | ||
1da177e4 LT |
13 | #include <linux/module.h> |
14 | #include <linux/init.h> | |
15 | #include <linux/kernel.h> | |
1da177e4 | 16 | #include <linux/poll.h> |
1da177e4 LT |
17 | #include <asm/uaccess.h> |
18 | ||
19 | #include "platform.h" | |
20 | #include "di_defs.h" | |
21 | #include "divasync.h" | |
22 | #include "debug_if.h" | |
23 | ||
24 | static char *main_revision = "$Revision: 1.32.6.10 $"; | |
25 | ||
26 | static int major; | |
27 | ||
28 | MODULE_DESCRIPTION("Maint driver for Eicon DIVA Server cards"); | |
29 | MODULE_AUTHOR("Cytronics & Melware, Eicon Networks"); | |
30 | MODULE_SUPPORTED_DEVICE("DIVA card driver"); | |
31 | MODULE_LICENSE("GPL"); | |
32 | ||
33 | static int buffer_length = 128; | |
34 | module_param(buffer_length, int, 0); | |
35 | static unsigned long diva_dbg_mem = 0; | |
36 | module_param(diva_dbg_mem, ulong, 0); | |
37 | ||
38 | static char *DRIVERNAME = | |
39 | "Eicon DIVA - MAINT module (http://www.melware.net)"; | |
40 | static char *DRIVERLNAME = "diva_mnt"; | |
41 | static char *DEVNAME = "DivasMAINT"; | |
42 | char *DRIVERRELEASE_MNT = "2.0"; | |
43 | ||
44 | static wait_queue_head_t msgwaitq; | |
45 | static unsigned long opened; | |
46 | static struct timeval start_time; | |
47 | ||
48 | extern int mntfunc_init(int *, void **, unsigned long); | |
49 | extern void mntfunc_finit(void); | |
50 | extern int maint_read_write(void __user *buf, int count); | |
51 | ||
52 | /* | |
53 | * helper functions | |
54 | */ | |
55 | static char *getrev(const char *revision) | |
56 | { | |
57 | char *rev; | |
58 | char *p; | |
59 | ||
60 | if ((p = strchr(revision, ':'))) { | |
61 | rev = p + 2; | |
62 | p = strchr(rev, '$'); | |
63 | *--p = 0; | |
64 | } else | |
65 | rev = "1.0"; | |
66 | ||
67 | return rev; | |
68 | } | |
69 | ||
70 | /* | |
71 | * kernel/user space copy functions | |
72 | */ | |
73 | int diva_os_copy_to_user(void *os_handle, void __user *dst, const void *src, | |
74 | int length) | |
75 | { | |
76 | return (copy_to_user(dst, src, length)); | |
77 | } | |
78 | int diva_os_copy_from_user(void *os_handle, void *dst, const void __user *src, | |
79 | int length) | |
80 | { | |
81 | return (copy_from_user(dst, src, length)); | |
82 | } | |
83 | ||
84 | /* | |
85 | * get time | |
86 | */ | |
87 | void diva_os_get_time(dword * sec, dword * usec) | |
88 | { | |
89 | struct timeval tv; | |
90 | ||
91 | do_gettimeofday(&tv); | |
92 | ||
93 | if (tv.tv_sec > start_time.tv_sec) { | |
94 | if (start_time.tv_usec > tv.tv_usec) { | |
95 | tv.tv_sec--; | |
96 | tv.tv_usec += 1000000; | |
97 | } | |
98 | *sec = (dword) (tv.tv_sec - start_time.tv_sec); | |
99 | *usec = (dword) (tv.tv_usec - start_time.tv_usec); | |
100 | } else if (tv.tv_sec == start_time.tv_sec) { | |
101 | *sec = 0; | |
102 | if (start_time.tv_usec < tv.tv_usec) { | |
103 | *usec = (dword) (tv.tv_usec - start_time.tv_usec); | |
104 | } else { | |
105 | *usec = 0; | |
106 | } | |
107 | } else { | |
108 | *sec = (dword) tv.tv_sec; | |
109 | *usec = (dword) tv.tv_usec; | |
110 | } | |
111 | } | |
112 | ||
113 | /* | |
114 | * device node operations | |
115 | */ | |
116 | static unsigned int maint_poll(struct file *file, poll_table * wait) | |
117 | { | |
118 | unsigned int mask = 0; | |
119 | ||
120 | poll_wait(file, &msgwaitq, wait); | |
121 | mask = POLLOUT | POLLWRNORM; | |
122 | if (file->private_data || diva_dbg_q_length()) { | |
123 | mask |= POLLIN | POLLRDNORM; | |
124 | } | |
125 | return (mask); | |
126 | } | |
127 | ||
128 | static int maint_open(struct inode *ino, struct file *filep) | |
129 | { | |
130 | /* only one open is allowed, so we test | |
131 | it atomically */ | |
132 | if (test_and_set_bit(0, &opened)) | |
133 | return (-EBUSY); | |
134 | ||
135 | filep->private_data = NULL; | |
136 | ||
137 | return nonseekable_open(ino, filep); | |
138 | } | |
139 | ||
140 | static int maint_close(struct inode *ino, struct file *filep) | |
141 | { | |
142 | if (filep->private_data) { | |
143 | diva_os_free(0, filep->private_data); | |
144 | filep->private_data = NULL; | |
145 | } | |
146 | ||
147 | /* clear 'used' flag */ | |
148 | clear_bit(0, &opened); | |
149 | ||
150 | return (0); | |
151 | } | |
152 | ||
153 | static ssize_t divas_maint_write(struct file *file, const char __user *buf, | |
154 | size_t count, loff_t * ppos) | |
155 | { | |
156 | return (maint_read_write((char __user *) buf, (int) count)); | |
157 | } | |
158 | ||
159 | static ssize_t divas_maint_read(struct file *file, char __user *buf, | |
160 | size_t count, loff_t * ppos) | |
161 | { | |
162 | return (maint_read_write(buf, (int) count)); | |
163 | } | |
164 | ||
2b8693c0 | 165 | static const struct file_operations divas_maint_fops = { |
1da177e4 LT |
166 | .owner = THIS_MODULE, |
167 | .llseek = no_llseek, | |
168 | .read = divas_maint_read, | |
169 | .write = divas_maint_write, | |
170 | .poll = maint_poll, | |
171 | .open = maint_open, | |
172 | .release = maint_close | |
173 | }; | |
174 | ||
175 | static void divas_maint_unregister_chrdev(void) | |
176 | { | |
1da177e4 LT |
177 | unregister_chrdev(major, DEVNAME); |
178 | } | |
179 | ||
180 | static int DIVA_INIT_FUNCTION divas_maint_register_chrdev(void) | |
181 | { | |
182 | if ((major = register_chrdev(0, DEVNAME, &divas_maint_fops)) < 0) | |
183 | { | |
184 | printk(KERN_ERR "%s: failed to create /dev entry.\n", | |
185 | DRIVERLNAME); | |
186 | return (0); | |
187 | } | |
1da177e4 LT |
188 | |
189 | return (1); | |
190 | } | |
191 | ||
192 | /* | |
193 | * wake up reader | |
194 | */ | |
195 | void diva_maint_wakeup_read(void) | |
196 | { | |
197 | wake_up_interruptible(&msgwaitq); | |
198 | } | |
199 | ||
200 | /* | |
201 | * Driver Load | |
202 | */ | |
203 | static int DIVA_INIT_FUNCTION maint_init(void) | |
204 | { | |
205 | char tmprev[50]; | |
206 | int ret = 0; | |
207 | void *buffer = NULL; | |
208 | ||
209 | do_gettimeofday(&start_time); | |
210 | init_waitqueue_head(&msgwaitq); | |
211 | ||
212 | printk(KERN_INFO "%s\n", DRIVERNAME); | |
213 | printk(KERN_INFO "%s: Rel:%s Rev:", DRIVERLNAME, DRIVERRELEASE_MNT); | |
214 | strcpy(tmprev, main_revision); | |
215 | printk("%s Build: %s \n", getrev(tmprev), DIVA_BUILD); | |
216 | ||
217 | if (!divas_maint_register_chrdev()) { | |
218 | ret = -EIO; | |
219 | goto out; | |
220 | } | |
221 | ||
222 | if (!(mntfunc_init(&buffer_length, &buffer, diva_dbg_mem))) { | |
223 | printk(KERN_ERR "%s: failed to connect to DIDD.\n", | |
224 | DRIVERLNAME); | |
225 | divas_maint_unregister_chrdev(); | |
226 | ret = -EIO; | |
227 | goto out; | |
228 | } | |
229 | ||
230 | printk(KERN_INFO "%s: trace buffer = %p - %d kBytes, %s (Major: %d)\n", | |
231 | DRIVERLNAME, buffer, (buffer_length / 1024), | |
232 | (diva_dbg_mem == 0) ? "internal" : "external", major); | |
233 | ||
234 | out: | |
235 | return (ret); | |
236 | } | |
237 | ||
238 | /* | |
239 | ** Driver Unload | |
240 | */ | |
241 | static void DIVA_EXIT_FUNCTION maint_exit(void) | |
242 | { | |
243 | divas_maint_unregister_chrdev(); | |
244 | mntfunc_finit(); | |
245 | ||
246 | printk(KERN_INFO "%s: module unloaded.\n", DRIVERLNAME); | |
247 | } | |
248 | ||
249 | module_init(maint_init); | |
250 | module_exit(maint_exit); | |
251 |