1 /*
2 * Copyright 2003 Digi International (www.digi.com)
3 * Scott H Kilau <Scott_Kilau at digi dot com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2, or (at your option)
8 * any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
12 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
13 * PURPOSE. See the GNU General Public License for more details.
14 */
15
16 /************************************************************************
17 *
18 * This file implements the mgmt functionality for the
19 * Neo and ClassicBoard based product lines.
20 *
21 ************************************************************************
22 */
23 #include <linux/kernel.h>
24 #include <linux/ctype.h>
25 #include <linux/sched.h> /* For jiffies, task states */
26 #include <linux/interrupt.h> /* For tasklet and interrupt structs/defines */
27 #include <linux/serial_reg.h>
28 #include <linux/termios.h>
29 #include <linux/uaccess.h> /* For copy_from_user/copy_to_user */
30
31 #include "dgnc_driver.h"
32 #include "dgnc_pci.h"
33 #include "dgnc_mgmt.h"
34
35 /* Our "in use" variables, to enforce 1 open only */
36 static int dgnc_mgmt_in_use[MAXMGMTDEVICES];
37
38 /*
39 * dgnc_mgmt_open()
40 *
41 * Open the mgmt/downld/dpa device
42 */
dgnc_mgmt_open(struct inode * inode,struct file * file)43 int dgnc_mgmt_open(struct inode *inode, struct file *file)
44 {
45 unsigned long flags;
46 unsigned int minor = iminor(inode);
47
48 spin_lock_irqsave(&dgnc_global_lock, flags);
49
50 /* mgmt device */
51 if (minor < MAXMGMTDEVICES) {
52 /* Only allow 1 open at a time on mgmt device */
53 if (dgnc_mgmt_in_use[minor]) {
54 spin_unlock_irqrestore(&dgnc_global_lock, flags);
55 return -EBUSY;
56 }
57 dgnc_mgmt_in_use[minor]++;
58 } else {
59 spin_unlock_irqrestore(&dgnc_global_lock, flags);
60 return -ENXIO;
61 }
62
63 spin_unlock_irqrestore(&dgnc_global_lock, flags);
64
65 return 0;
66 }
67
68 /*
69 * dgnc_mgmt_close()
70 *
71 * Open the mgmt/dpa device
72 */
dgnc_mgmt_close(struct inode * inode,struct file * file)73 int dgnc_mgmt_close(struct inode *inode, struct file *file)
74 {
75 unsigned long flags;
76 unsigned int minor = iminor(inode);
77
78 spin_lock_irqsave(&dgnc_global_lock, flags);
79
80 /* mgmt device */
81 if (minor < MAXMGMTDEVICES) {
82 if (dgnc_mgmt_in_use[minor])
83 dgnc_mgmt_in_use[minor] = 0;
84 }
85 spin_unlock_irqrestore(&dgnc_global_lock, flags);
86
87 return 0;
88 }
89
90 /*
91 * dgnc_mgmt_ioctl()
92 *
93 * ioctl the mgmt/dpa device
94 */
95
dgnc_mgmt_ioctl(struct file * file,unsigned int cmd,unsigned long arg)96 long dgnc_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
97 {
98 unsigned long flags;
99 void __user *uarg = (void __user *)arg;
100
101 switch (cmd) {
102 case DIGI_GETDD:
103 {
104 /*
105 * This returns the total number of boards
106 * in the system, as well as driver version
107 * and has space for a reserved entry
108 */
109 struct digi_dinfo ddi;
110
111 spin_lock_irqsave(&dgnc_global_lock, flags);
112
113 memset(&ddi, 0, sizeof(ddi));
114 ddi.dinfo_nboards = dgnc_NumBoards;
115 sprintf(ddi.dinfo_version, "%s", DG_PART);
116
117 spin_unlock_irqrestore(&dgnc_global_lock, flags);
118
119 if (copy_to_user(uarg, &ddi, sizeof(ddi)))
120 return -EFAULT;
121
122 break;
123 }
124
125 case DIGI_GETBD:
126 {
127 int brd;
128
129 struct digi_info di;
130
131 if (copy_from_user(&brd, uarg, sizeof(int)))
132 return -EFAULT;
133
134 if (brd < 0 || brd >= dgnc_NumBoards)
135 return -ENODEV;
136
137 memset(&di, 0, sizeof(di));
138
139 di.info_bdnum = brd;
140
141 spin_lock_irqsave(&dgnc_Board[brd]->bd_lock, flags);
142
143 di.info_bdtype = dgnc_Board[brd]->dpatype;
144 di.info_bdstate = dgnc_Board[brd]->dpastatus;
145 di.info_ioport = 0;
146 di.info_physaddr = (ulong)dgnc_Board[brd]->membase;
147 di.info_physsize = (ulong)dgnc_Board[brd]->membase
148 - dgnc_Board[brd]->membase_end;
149 if (dgnc_Board[brd]->state != BOARD_FAILED)
150 di.info_nports = dgnc_Board[brd]->nasync;
151 else
152 di.info_nports = 0;
153
154 spin_unlock_irqrestore(&dgnc_Board[brd]->bd_lock, flags);
155
156 if (copy_to_user(uarg, &di, sizeof(di)))
157 return -EFAULT;
158
159 break;
160 }
161
162 case DIGI_GET_NI_INFO:
163 {
164 struct channel_t *ch;
165 struct ni_info ni;
166 unsigned char mstat = 0;
167 uint board = 0;
168 uint channel = 0;
169
170 if (copy_from_user(&ni, uarg, sizeof(ni)))
171 return -EFAULT;
172
173 board = ni.board;
174 channel = ni.channel;
175
176 /* Verify boundaries on board */
177 if (board >= dgnc_NumBoards)
178 return -ENODEV;
179
180 /* Verify boundaries on channel */
181 if (channel >= dgnc_Board[board]->nasync)
182 return -ENODEV;
183
184 ch = dgnc_Board[board]->channels[channel];
185
186 if (!ch || ch->magic != DGNC_CHANNEL_MAGIC)
187 return -ENODEV;
188
189 memset(&ni, 0, sizeof(ni));
190 ni.board = board;
191 ni.channel = channel;
192
193 spin_lock_irqsave(&ch->ch_lock, flags);
194
195 mstat = (ch->ch_mostat | ch->ch_mistat);
196
197 if (mstat & UART_MCR_DTR) {
198 ni.mstat |= TIOCM_DTR;
199 ni.dtr = TIOCM_DTR;
200 }
201 if (mstat & UART_MCR_RTS) {
202 ni.mstat |= TIOCM_RTS;
203 ni.rts = TIOCM_RTS;
204 }
205 if (mstat & UART_MSR_CTS) {
206 ni.mstat |= TIOCM_CTS;
207 ni.cts = TIOCM_CTS;
208 }
209 if (mstat & UART_MSR_RI) {
210 ni.mstat |= TIOCM_RI;
211 ni.ri = TIOCM_RI;
212 }
213 if (mstat & UART_MSR_DCD) {
214 ni.mstat |= TIOCM_CD;
215 ni.dcd = TIOCM_CD;
216 }
217 if (mstat & UART_MSR_DSR)
218 ni.mstat |= TIOCM_DSR;
219
220 ni.iflag = ch->ch_c_iflag;
221 ni.oflag = ch->ch_c_oflag;
222 ni.cflag = ch->ch_c_cflag;
223 ni.lflag = ch->ch_c_lflag;
224
225 if (ch->ch_digi.digi_flags & CTSPACE ||
226 ch->ch_c_cflag & CRTSCTS)
227 ni.hflow = 1;
228 else
229 ni.hflow = 0;
230
231 if ((ch->ch_flags & CH_STOPI) ||
232 (ch->ch_flags & CH_FORCED_STOPI))
233 ni.recv_stopped = 1;
234 else
235 ni.recv_stopped = 0;
236
237 if ((ch->ch_flags & CH_STOP) || (ch->ch_flags & CH_FORCED_STOP))
238 ni.xmit_stopped = 1;
239 else
240 ni.xmit_stopped = 0;
241
242 ni.curtx = ch->ch_txcount;
243 ni.currx = ch->ch_rxcount;
244
245 ni.baud = ch->ch_old_baud;
246
247 spin_unlock_irqrestore(&ch->ch_lock, flags);
248
249 if (copy_to_user(uarg, &ni, sizeof(ni)))
250 return -EFAULT;
251
252 break;
253 }
254 }
255
256 return 0;
257 }
258