drivers/staging/dgnc/dgnc_mgmt.c

   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  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  *
  19  *
  20  *      NOTE TO LINUX KERNEL HACKERS:  DO NOT REFORMAT THIS CODE!
  21  *
  22  *      This is shared code between Digi's CVS archive and the
  23  *      Linux Kernel sources.
  24  *      Changing the source just for reformatting needlessly breaks
  25  *      our CVS diff history.
  26  *
  27  *      Send any bug fixes/changes to:  Eng.Linux at digi dot com.
  28  *      Thank you.
  29  *
  30  */
  31
  32 /************************************************************************
  33  *
  34  * This file implements the mgmt functionality for the
  35  * Neo and ClassicBoard based product lines.
  36  *
  37  ************************************************************************
  38  */
  39 #include <linux/kernel.h>
  40 #include <linux/ctype.h>
  41 #include <linux/sched.h>        /* For jiffies, task states */
  42 #include <linux/interrupt.h>    /* For tasklet and interrupt structs/defines */
  43 #include <linux/serial_reg.h>
  44 #include <linux/termios.h>
  45 #include <linux/uaccess.h>      /* For copy_from_user/copy_to_user */
  46
  47 #include "dgnc_driver.h"
  48 #include "dgnc_pci.h"
  49 #include "dgnc_kcompat.h"       /* Kernel 2.4/2.6 compat includes */
  50 #include "dgnc_mgmt.h"
  51 #include "dpacompat.h"
  52
  53
  54 /* Our "in use" variables, to enforce 1 open only */
  55 static int dgnc_mgmt_in_use[MAXMGMTDEVICES];
  56
  57
  58 /*
  59  * dgnc_mgmt_open()
  60  *
  61  * Open the mgmt/downld/dpa device
  62  */
  63 int dgnc_mgmt_open(struct inode *inode, struct file *file)
  64 {
  65         unsigned long flags;
  66         unsigned int minor = iminor(inode);
  67
  68         spin_lock_irqsave(&dgnc_global_lock, flags);
  69
  70         /* mgmt device */
  71         if (minor < MAXMGMTDEVICES) {
  72                 /* Only allow 1 open at a time on mgmt device */
  73                 if (dgnc_mgmt_in_use[minor]) {
  74                         spin_unlock_irqrestore(&dgnc_global_lock, flags);
  75                         return -EBUSY;
  76                 }
  77                 dgnc_mgmt_in_use[minor]++;
  78         } else {
  79                 spin_unlock_irqrestore(&dgnc_global_lock, flags);
  80                 return -ENXIO;
  81         }
  82
  83         spin_unlock_irqrestore(&dgnc_global_lock, flags);
  84
  85         return 0;
  86 }
  87
  88
  89 /*
  90  * dgnc_mgmt_close()
  91  *
  92  * Open the mgmt/dpa device
  93  */
  94 int dgnc_mgmt_close(struct inode *inode, struct file *file)
  95 {
  96         unsigned long flags;
  97         unsigned int minor = iminor(inode);
  98
  99         spin_lock_irqsave(&dgnc_global_lock, flags);
 100
 101         /* mgmt device */
 102         if (minor < MAXMGMTDEVICES) {
 103                 if (dgnc_mgmt_in_use[minor])
 104                         dgnc_mgmt_in_use[minor] = 0;
 105         }
 106         spin_unlock_irqrestore(&dgnc_global_lock, flags);
 107
 108         return 0;
 109 }
 110
 111
 112 /*
 113  * dgnc_mgmt_ioctl()
 114  *
 115  * ioctl the mgmt/dpa device
 116  */
 117
 118 long dgnc_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 119 {
 120         unsigned long flags;
 121         void __user *uarg = (void __user *) arg;
 122
 123         switch (cmd) {
 124
 125         case DIGI_GETDD:
 126         {
 127                 /*
 128                  * This returns the total number of boards
 129                  * in the system, as well as driver version
 130                  * and has space for a reserved entry
 131                  */
 132                 struct digi_dinfo ddi;
 133
 134                 spin_lock_irqsave(&dgnc_global_lock, flags);
 135
 136                 ddi.dinfo_nboards = dgnc_NumBoards;
 137                 sprintf(ddi.dinfo_version, "%s", DG_PART);
 138
 139                 spin_unlock_irqrestore(&dgnc_global_lock, flags);
 140
 141                 if (copy_to_user(uarg, &ddi, sizeof(ddi)))
 142                         return -EFAULT;
 143
 144                 break;
 145         }
 146
 147         case DIGI_GETBD:
 148         {
 149                 int brd;
 150
 151                 struct digi_info di;
 152
 153                 if (copy_from_user(&brd, uarg, sizeof(int)))
 154                         return -EFAULT;
 155
 156                 if ((brd < 0) || (brd > dgnc_NumBoards) ||
 157                     (dgnc_NumBoards == 0))
 158                         return -ENODEV;
 159
 160                 memset(&di, 0, sizeof(di));
 161
 162                 di.info_bdnum = brd;
 163
 164                 spin_lock_irqsave(&dgnc_Board[brd]->bd_lock, flags);
 165
 166                 di.info_bdtype = dgnc_Board[brd]->dpatype;
 167                 di.info_bdstate = dgnc_Board[brd]->dpastatus;
 168                 di.info_ioport = 0;
 169                 di.info_physaddr = (ulong) dgnc_Board[brd]->membase;
 170                 di.info_physsize = (ulong) dgnc_Board[brd]->membase - dgnc_Board[brd]->membase_end;
 171                 if (dgnc_Board[brd]->state != BOARD_FAILED)
 172                         di.info_nports = dgnc_Board[brd]->nasync;
 173                 else
 174                         di.info_nports = 0;
 175
 176                 spin_unlock_irqrestore(&dgnc_Board[brd]->bd_lock, flags);
 177
 178                 if (copy_to_user(uarg, &di, sizeof(di)))
 179                         return -EFAULT;
 180
 181                 break;
 182         }
 183
 184         case DIGI_GET_NI_INFO:
 185         {
 186                 struct channel_t *ch;
 187                 struct ni_info ni;
 188                 unsigned char mstat = 0;
 189                 uint board = 0;
 190                 uint channel = 0;
 191
 192                 if (copy_from_user(&ni, uarg, sizeof(ni)))
 193                         return -EFAULT;
 194
 195                 board = ni.board;
 196                 channel = ni.channel;
 197
 198                 /* Verify boundaries on board */
 199                 if ((board > dgnc_NumBoards) || (dgnc_NumBoards == 0))
 200                         return -ENODEV;
 201
 202                 /* Verify boundaries on channel */
 203                 if ((channel < 0) || (channel > dgnc_Board[board]->nasync))
 204                         return -ENODEV;
 205
 206                 ch = dgnc_Board[board]->channels[channel];
 207
 208                 if (!ch || ch->magic != DGNC_CHANNEL_MAGIC)
 209                         return -ENODEV;
 210
 211                 memset(&ni, 0, sizeof(ni));
 212                 ni.board = board;
 213                 ni.channel = channel;
 214
 215                 spin_lock_irqsave(&ch->ch_lock, flags);
 216
 217                 mstat = (ch->ch_mostat | ch->ch_mistat);
 218
 219                 if (mstat & UART_MCR_DTR) {
 220                         ni.mstat |= TIOCM_DTR;
 221                         ni.dtr = TIOCM_DTR;
 222                 }
 223                 if (mstat & UART_MCR_RTS) {
 224                         ni.mstat |= TIOCM_RTS;
 225                         ni.rts = TIOCM_RTS;
 226                 }
 227                 if (mstat & UART_MSR_CTS) {
 228                         ni.mstat |= TIOCM_CTS;
 229                         ni.cts = TIOCM_CTS;
 230                 }
 231                 if (mstat & UART_MSR_RI) {
 232                         ni.mstat |= TIOCM_RI;
 233                         ni.ri = TIOCM_RI;
 234                 }
 235                 if (mstat & UART_MSR_DCD) {
 236                         ni.mstat |= TIOCM_CD;
 237                         ni.dcd = TIOCM_CD;
 238                 }
 239                 if (mstat & UART_MSR_DSR)
 240                         ni.mstat |= TIOCM_DSR;
 241
 242                 ni.iflag = ch->ch_c_iflag;
 243                 ni.oflag = ch->ch_c_oflag;
 244                 ni.cflag = ch->ch_c_cflag;
 245                 ni.lflag = ch->ch_c_lflag;
 246
 247                 if (ch->ch_digi.digi_flags & CTSPACE ||
 248                     ch->ch_c_cflag & CRTSCTS)
 249                         ni.hflow = 1;
 250                 else
 251                         ni.hflow = 0;
 252
 253                 if ((ch->ch_flags & CH_STOPI) ||
 254                     (ch->ch_flags & CH_FORCED_STOPI))
 255                         ni.recv_stopped = 1;
 256                 else
 257                         ni.recv_stopped = 0;
 258
 259                 if ((ch->ch_flags & CH_STOP) || (ch->ch_flags & CH_FORCED_STOP))
 260                         ni.xmit_stopped = 1;
 261                 else
 262                         ni.xmit_stopped = 0;
 263
 264                 ni.curtx = ch->ch_txcount;
 265                 ni.currx = ch->ch_rxcount;
 266
 267                 ni.baud = ch->ch_old_baud;
 268
 269                 spin_unlock_irqrestore(&ch->ch_lock, flags);
 270
 271                 if (copy_to_user(uarg, &ni, sizeof(ni)))
 272                         return -EFAULT;
 273
 274                 break;
 275         }
 276
 277
 278         }
 279
 280         return 0;
 281 }