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 <asm/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 lock_flags;
  66         unsigned int minor = iminor(inode);
  67
  68         DPR_MGMT(("dgnc_mgmt_open start.\n"));
  69
  70         DGNC_LOCK(dgnc_global_lock, lock_flags);
  71
  72         /* mgmt device */
  73         if (minor < MAXMGMTDEVICES) {
  74                 /* Only allow 1 open at a time on mgmt device */
  75                 if (dgnc_mgmt_in_use[minor]) {
  76                         DGNC_UNLOCK(dgnc_global_lock, lock_flags);
  77                         return (-EBUSY);
  78                 }
  79                 dgnc_mgmt_in_use[minor]++;
  80         }
  81         else {
  82                 DGNC_UNLOCK(dgnc_global_lock, lock_flags);
  83                 return (-ENXIO);
  84         }
  85
  86         DGNC_UNLOCK(dgnc_global_lock, lock_flags);
  87
  88         DPR_MGMT(("dgnc_mgmt_open finish.\n"));
  89
  90         return 0;
  91 }
  92
  93
  94 /*
  95  * dgnc_mgmt_close()
  96  *
  97  * Open the mgmt/dpa device
  98  */
  99 int dgnc_mgmt_close(struct inode *inode, struct file *file)
 100 {
 101         unsigned long lock_flags;
 102         unsigned int minor = iminor(inode);
 103
 104         DPR_MGMT(("dgnc_mgmt_close start.\n"));
 105
 106         DGNC_LOCK(dgnc_global_lock, lock_flags);
 107
 108         /* mgmt device */
 109         if (minor < MAXMGMTDEVICES) {
 110                 if (dgnc_mgmt_in_use[minor]) {
 111                         dgnc_mgmt_in_use[minor] = 0;
 112                 }
 113         }
 114         DGNC_UNLOCK(dgnc_global_lock, lock_flags);
 115
 116         DPR_MGMT(("dgnc_mgmt_close finish.\n"));
 117
 118         return 0;
 119 }
 120
 121
 122 /*
 123  * dgnc_mgmt_ioctl()
 124  *
 125  * ioctl the mgmt/dpa device
 126  */
 127
 128 long dgnc_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 129 {
 130         unsigned long lock_flags;
 131         void __user *uarg = (void __user *) arg;
 132
 133         DPR_MGMT(("dgnc_mgmt_ioctl start.\n"));
 134
 135         switch (cmd) {
 136
 137         case DIGI_GETDD:
 138         {
 139                 /*
 140                  * This returns the total number of boards
 141                  * in the system, as well as driver version
 142                  * and has space for a reserved entry
 143                  */
 144                 struct digi_dinfo ddi;
 145
 146                 DGNC_LOCK(dgnc_global_lock, lock_flags);
 147
 148                 ddi.dinfo_nboards = dgnc_NumBoards;
 149                 sprintf(ddi.dinfo_version, "%s", DG_PART);
 150
 151                 DGNC_UNLOCK(dgnc_global_lock, lock_flags);
 152
 153                 DPR_MGMT(("DIGI_GETDD returning numboards: %d version: %s\n",
 154                         ddi.dinfo_nboards, ddi.dinfo_version));
 155
 156                 if (copy_to_user(uarg, &ddi, sizeof (ddi)))
 157                         return(-EFAULT);
 158
 159                 break;
 160         }
 161
 162         case DIGI_GETBD:
 163         {
 164                 int brd;
 165
 166                 struct digi_info di;
 167
 168                 if (copy_from_user(&brd, uarg, sizeof(int))) {
 169                         return(-EFAULT);
 170                 }
 171
 172                 DPR_MGMT(("DIGI_GETBD asking about board: %d\n", brd));
 173
 174                 if ((brd < 0) || (brd > dgnc_NumBoards) || (dgnc_NumBoards == 0))
 175                         return (-ENODEV);
 176
 177                 memset(&di, 0, sizeof(di));
 178
 179                 di.info_bdnum = brd;
 180
 181                 DGNC_LOCK(dgnc_Board[brd]->bd_lock, lock_flags);
 182
 183                 di.info_bdtype = dgnc_Board[brd]->dpatype;
 184                 di.info_bdstate = dgnc_Board[brd]->dpastatus;
 185                 di.info_ioport = 0;
 186                 di.info_physaddr = (ulong) dgnc_Board[brd]->membase;
 187                 di.info_physsize = (ulong) dgnc_Board[brd]->membase - dgnc_Board[brd]->membase_end;
 188                 if (dgnc_Board[brd]->state != BOARD_FAILED)
 189                         di.info_nports = dgnc_Board[brd]->nasync;
 190                 else
 191                         di.info_nports = 0;
 192
 193                 DGNC_UNLOCK(dgnc_Board[brd]->bd_lock, lock_flags);
 194
 195                 DPR_MGMT(("DIGI_GETBD returning type: %x state: %x ports: %x size: %x\n",
 196                         di.info_bdtype, di.info_bdstate, di.info_nports, di.info_physsize));
 197
 198                 if (copy_to_user(uarg, &di, sizeof (di)))
 199                         return (-EFAULT);
 200
 201                 break;
 202         }
 203
 204         case DIGI_GET_NI_INFO:
 205         {
 206                 struct channel_t *ch;
 207                 struct ni_info ni;
 208                 uchar mstat = 0;
 209                 uint board = 0;
 210                 uint channel = 0;
 211
 212                 if (copy_from_user(&ni, uarg, sizeof(struct ni_info))) {
 213                         return(-EFAULT);
 214                 }
 215
 216                 DPR_MGMT(("DIGI_GETBD asking about board: %d channel: %d\n",
 217                         ni.board, ni.channel));
 218
 219                 board = ni.board;
 220                 channel = ni.channel;
 221
 222                 /* Verify boundaries on board */
 223                 if ((board < 0) || (board > dgnc_NumBoards) || (dgnc_NumBoards == 0))
 224                         return (-ENODEV);
 225
 226                 /* Verify boundaries on channel */
 227                 if ((channel < 0) || (channel > dgnc_Board[board]->nasync))
 228                         return (-ENODEV);
 229
 230                 ch = dgnc_Board[board]->channels[channel];
 231
 232                 if (!ch || ch->magic != DGNC_CHANNEL_MAGIC)
 233                         return (-ENODEV);
 234
 235                 memset(&ni, 0, sizeof(ni));
 236                 ni.board = board;
 237                 ni.channel = channel;
 238
 239                 DGNC_LOCK(ch->ch_lock, lock_flags);
 240
 241                 mstat = (ch->ch_mostat | ch->ch_mistat);
 242
 243                 if (mstat & UART_MCR_DTR) {
 244                         ni.mstat |= TIOCM_DTR;
 245                         ni.dtr = TIOCM_DTR;
 246                 }
 247                 if (mstat & UART_MCR_RTS) {
 248                         ni.mstat |= TIOCM_RTS;
 249                         ni.rts = TIOCM_RTS;
 250                 }
 251                 if (mstat & UART_MSR_CTS) {
 252                         ni.mstat |= TIOCM_CTS;
 253                         ni.cts = TIOCM_CTS;
 254                 }
 255                 if (mstat & UART_MSR_RI) {
 256                         ni.mstat |= TIOCM_RI;
 257                         ni.ri = TIOCM_RI;
 258                 }
 259                 if (mstat & UART_MSR_DCD) {
 260                         ni.mstat |= TIOCM_CD;
 261                         ni.dcd = TIOCM_CD;
 262                 }
 263                 if (mstat & UART_MSR_DSR)
 264                         ni.mstat |= TIOCM_DSR;
 265
 266                 ni.iflag = ch->ch_c_iflag;
 267                 ni.oflag = ch->ch_c_oflag;
 268                 ni.cflag = ch->ch_c_cflag;
 269                 ni.lflag = ch->ch_c_lflag;
 270
 271                 if (ch->ch_digi.digi_flags & CTSPACE || ch->ch_c_cflag & CRTSCTS)
 272                         ni.hflow = 1;
 273                 else
 274                         ni.hflow = 0;
 275
 276                 if ((ch->ch_flags & CH_STOPI) || (ch->ch_flags & CH_FORCED_STOPI))
 277                         ni.recv_stopped = 1;
 278                 else
 279                         ni.recv_stopped = 0;
 280
 281                 if ((ch->ch_flags & CH_STOP) || (ch->ch_flags & CH_FORCED_STOP))
 282                         ni.xmit_stopped = 1;
 283                 else
 284                         ni.xmit_stopped = 0;
 285
 286                 ni.curtx = ch->ch_txcount;
 287                 ni.currx = ch->ch_rxcount;
 288
 289                 ni.baud = ch->ch_old_baud;
 290
 291                 DGNC_UNLOCK(ch->ch_lock, lock_flags);
 292
 293                 if (copy_to_user(uarg, &ni, sizeof(ni)))
 294                         return (-EFAULT);
 295
 296                 break;
 297         }
 298
 299
 300         }
 301
 302         DPR_MGMT(("dgnc_mgmt_ioctl finish.\n"));
 303
 304         return 0;
 305 }