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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 | ||
13 | #include <linux/config.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/sched.h> | |
18 | #include <linux/smp_lock.h> | |
19 | #include <linux/poll.h> | |
20 | #include <linux/devfs_fs_kernel.h> | |
21 | #include <asm/uaccess.h> | |
22 | ||
23 | #include "platform.h" | |
24 | #include "di_defs.h" | |
25 | #include "divasync.h" | |
26 | #include "debug_if.h" | |
27 | ||
28 | static char *main_revision = "$Revision: 1.32.6.10 $"; | |
29 | ||
30 | static int major; | |
31 | ||
32 | MODULE_DESCRIPTION("Maint driver for Eicon DIVA Server cards"); | |
33 | MODULE_AUTHOR("Cytronics & Melware, Eicon Networks"); | |
34 | MODULE_SUPPORTED_DEVICE("DIVA card driver"); | |
35 | MODULE_LICENSE("GPL"); | |
36 | ||
37 | static int buffer_length = 128; | |
38 | module_param(buffer_length, int, 0); | |
39 | static unsigned long diva_dbg_mem = 0; | |
40 | module_param(diva_dbg_mem, ulong, 0); | |
41 | ||
42 | static char *DRIVERNAME = | |
43 | "Eicon DIVA - MAINT module (http://www.melware.net)"; | |
44 | static char *DRIVERLNAME = "diva_mnt"; | |
45 | static char *DEVNAME = "DivasMAINT"; | |
46 | char *DRIVERRELEASE_MNT = "2.0"; | |
47 | ||
48 | static wait_queue_head_t msgwaitq; | |
49 | static unsigned long opened; | |
50 | static struct timeval start_time; | |
51 | ||
52 | extern int mntfunc_init(int *, void **, unsigned long); | |
53 | extern void mntfunc_finit(void); | |
54 | extern int maint_read_write(void __user *buf, int count); | |
55 | ||
56 | /* | |
57 | * helper functions | |
58 | */ | |
59 | static char *getrev(const char *revision) | |
60 | { | |
61 | char *rev; | |
62 | char *p; | |
63 | ||
64 | if ((p = strchr(revision, ':'))) { | |
65 | rev = p + 2; | |
66 | p = strchr(rev, '$'); | |
67 | *--p = 0; | |
68 | } else | |
69 | rev = "1.0"; | |
70 | ||
71 | return rev; | |
72 | } | |
73 | ||
74 | /* | |
75 | * kernel/user space copy functions | |
76 | */ | |
77 | int diva_os_copy_to_user(void *os_handle, void __user *dst, const void *src, | |
78 | int length) | |
79 | { | |
80 | return (copy_to_user(dst, src, length)); | |
81 | } | |
82 | int diva_os_copy_from_user(void *os_handle, void *dst, const void __user *src, | |
83 | int length) | |
84 | { | |
85 | return (copy_from_user(dst, src, length)); | |
86 | } | |
87 | ||
88 | /* | |
89 | * get time | |
90 | */ | |
91 | void diva_os_get_time(dword * sec, dword * usec) | |
92 | { | |
93 | struct timeval tv; | |
94 | ||
95 | do_gettimeofday(&tv); | |
96 | ||
97 | if (tv.tv_sec > start_time.tv_sec) { | |
98 | if (start_time.tv_usec > tv.tv_usec) { | |
99 | tv.tv_sec--; | |
100 | tv.tv_usec += 1000000; | |
101 | } | |
102 | *sec = (dword) (tv.tv_sec - start_time.tv_sec); | |
103 | *usec = (dword) (tv.tv_usec - start_time.tv_usec); | |
104 | } else if (tv.tv_sec == start_time.tv_sec) { | |
105 | *sec = 0; | |
106 | if (start_time.tv_usec < tv.tv_usec) { | |
107 | *usec = (dword) (tv.tv_usec - start_time.tv_usec); | |
108 | } else { | |
109 | *usec = 0; | |
110 | } | |
111 | } else { | |
112 | *sec = (dword) tv.tv_sec; | |
113 | *usec = (dword) tv.tv_usec; | |
114 | } | |
115 | } | |
116 | ||
117 | /* | |
118 | * device node operations | |
119 | */ | |
120 | static unsigned int maint_poll(struct file *file, poll_table * wait) | |
121 | { | |
122 | unsigned int mask = 0; | |
123 | ||
124 | poll_wait(file, &msgwaitq, wait); | |
125 | mask = POLLOUT | POLLWRNORM; | |
126 | if (file->private_data || diva_dbg_q_length()) { | |
127 | mask |= POLLIN | POLLRDNORM; | |
128 | } | |
129 | return (mask); | |
130 | } | |
131 | ||
132 | static int maint_open(struct inode *ino, struct file *filep) | |
133 | { | |
134 | /* only one open is allowed, so we test | |
135 | it atomically */ | |
136 | if (test_and_set_bit(0, &opened)) | |
137 | return (-EBUSY); | |
138 | ||
139 | filep->private_data = NULL; | |
140 | ||
141 | return nonseekable_open(ino, filep); | |
142 | } | |
143 | ||
144 | static int maint_close(struct inode *ino, struct file *filep) | |
145 | { | |
146 | if (filep->private_data) { | |
147 | diva_os_free(0, filep->private_data); | |
148 | filep->private_data = NULL; | |
149 | } | |
150 | ||
151 | /* clear 'used' flag */ | |
152 | clear_bit(0, &opened); | |
153 | ||
154 | return (0); | |
155 | } | |
156 | ||
157 | static ssize_t divas_maint_write(struct file *file, const char __user *buf, | |
158 | size_t count, loff_t * ppos) | |
159 | { | |
160 | return (maint_read_write((char __user *) buf, (int) count)); | |
161 | } | |
162 | ||
163 | static ssize_t divas_maint_read(struct file *file, char __user *buf, | |
164 | size_t count, loff_t * ppos) | |
165 | { | |
166 | return (maint_read_write(buf, (int) count)); | |
167 | } | |
168 | ||
169 | static struct file_operations divas_maint_fops = { | |
170 | .owner = THIS_MODULE, | |
171 | .llseek = no_llseek, | |
172 | .read = divas_maint_read, | |
173 | .write = divas_maint_write, | |
174 | .poll = maint_poll, | |
175 | .open = maint_open, | |
176 | .release = maint_close | |
177 | }; | |
178 | ||
179 | static void divas_maint_unregister_chrdev(void) | |
180 | { | |
181 | devfs_remove(DEVNAME); | |
182 | unregister_chrdev(major, DEVNAME); | |
183 | } | |
184 | ||
185 | static int DIVA_INIT_FUNCTION divas_maint_register_chrdev(void) | |
186 | { | |
187 | if ((major = register_chrdev(0, DEVNAME, &divas_maint_fops)) < 0) | |
188 | { | |
189 | printk(KERN_ERR "%s: failed to create /dev entry.\n", | |
190 | DRIVERLNAME); | |
191 | return (0); | |
192 | } | |
193 | devfs_mk_cdev(MKDEV(major, 0), S_IFCHR|S_IRUSR|S_IWUSR, DEVNAME); | |
194 | ||
195 | return (1); | |
196 | } | |
197 | ||
198 | /* | |
199 | * wake up reader | |
200 | */ | |
201 | void diva_maint_wakeup_read(void) | |
202 | { | |
203 | wake_up_interruptible(&msgwaitq); | |
204 | } | |
205 | ||
206 | /* | |
207 | * Driver Load | |
208 | */ | |
209 | static int DIVA_INIT_FUNCTION maint_init(void) | |
210 | { | |
211 | char tmprev[50]; | |
212 | int ret = 0; | |
213 | void *buffer = NULL; | |
214 | ||
215 | do_gettimeofday(&start_time); | |
216 | init_waitqueue_head(&msgwaitq); | |
217 | ||
218 | printk(KERN_INFO "%s\n", DRIVERNAME); | |
219 | printk(KERN_INFO "%s: Rel:%s Rev:", DRIVERLNAME, DRIVERRELEASE_MNT); | |
220 | strcpy(tmprev, main_revision); | |
221 | printk("%s Build: %s \n", getrev(tmprev), DIVA_BUILD); | |
222 | ||
223 | if (!divas_maint_register_chrdev()) { | |
224 | ret = -EIO; | |
225 | goto out; | |
226 | } | |
227 | ||
228 | if (!(mntfunc_init(&buffer_length, &buffer, diva_dbg_mem))) { | |
229 | printk(KERN_ERR "%s: failed to connect to DIDD.\n", | |
230 | DRIVERLNAME); | |
231 | divas_maint_unregister_chrdev(); | |
232 | ret = -EIO; | |
233 | goto out; | |
234 | } | |
235 | ||
236 | printk(KERN_INFO "%s: trace buffer = %p - %d kBytes, %s (Major: %d)\n", | |
237 | DRIVERLNAME, buffer, (buffer_length / 1024), | |
238 | (diva_dbg_mem == 0) ? "internal" : "external", major); | |
239 | ||
240 | out: | |
241 | return (ret); | |
242 | } | |
243 | ||
244 | /* | |
245 | ** Driver Unload | |
246 | */ | |
247 | static void DIVA_EXIT_FUNCTION maint_exit(void) | |
248 | { | |
249 | divas_maint_unregister_chrdev(); | |
250 | mntfunc_finit(); | |
251 | ||
252 | printk(KERN_INFO "%s: module unloaded.\n", DRIVERLNAME); | |
253 | } | |
254 | ||
255 | module_init(maint_init); | |
256 | module_exit(maint_exit); | |
257 |