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  * $Id: dgnc_mgmt.c,v 1.2 2010/12/14 20:08:29 markh Exp $
  39  */
  40 #include <linux/kernel.h>
  41 #include <linux/ctype.h>
  42 #include <linux/sched.h>        /* For jiffies, task states */
  43 #include <linux/interrupt.h>    /* For tasklet and interrupt structs/defines */
  44 #include <linux/serial_reg.h>
  45 #include <linux/termios.h>
  46 #include <asm/uaccess.h>        /* For copy_from_user/copy_to_user */
  47
  48 #include "dgnc_driver.h"
  49 #include "dgnc_pci.h"
  50 #include "dgnc_kcompat.h"       /* Kernel 2.4/2.6 compat includes */
  51 #include "dgnc_mgmt.h"
  52 #include "dpacompat.h"
  53
  54
  55 /* Our "in use" variables, to enforce 1 open only */
  56 static int dgnc_mgmt_in_use[MAXMGMTDEVICES];
  57
  58
  59 /*
  60  * dgnc_mgmt_open()
  61  *
  62  * Open the mgmt/downld/dpa device
  63  */
  64 int dgnc_mgmt_open(struct inode *inode, struct file *file)
  65 {
  66         unsigned long lock_flags;
  67         unsigned int minor = iminor(inode);
  68
  69         DPR_MGMT(("dgnc_mgmt_open start.\n"));
  70
  71         DGNC_LOCK(dgnc_global_lock, lock_flags);
  72
  73         /* mgmt device */
  74         if (minor < MAXMGMTDEVICES) {
  75                 /* Only allow 1 open at a time on mgmt device */
  76                 if (dgnc_mgmt_in_use[minor]) {
  77                         DGNC_UNLOCK(dgnc_global_lock, lock_flags);
  78                         return (-EBUSY);
  79                 }
  80                 dgnc_mgmt_in_use[minor]++;
  81         }
  82         else {
  83                 DGNC_UNLOCK(dgnc_global_lock, lock_flags);
  84                 return (-ENXIO);
  85         }
  86
  87         DGNC_UNLOCK(dgnc_global_lock, lock_flags);
  88
  89         DPR_MGMT(("dgnc_mgmt_open finish.\n"));
  90
  91         return 0;
  92 }
  93
  94
  95 /*
  96  * dgnc_mgmt_close()
  97  *
  98  * Open the mgmt/dpa device
  99  */
 100 int dgnc_mgmt_close(struct inode *inode, struct file *file)
 101 {
 102         unsigned long lock_flags;
 103         unsigned int minor = iminor(inode);
 104
 105         DPR_MGMT(("dgnc_mgmt_close start.\n"));
 106
 107         DGNC_LOCK(dgnc_global_lock, lock_flags);
 108
 109         /* mgmt device */
 110         if (minor < MAXMGMTDEVICES) {
 111                 if (dgnc_mgmt_in_use[minor]) {
 112                         dgnc_mgmt_in_use[minor] = 0;
 113                 }
 114         }
 115         DGNC_UNLOCK(dgnc_global_lock, lock_flags);
 116
 117         DPR_MGMT(("dgnc_mgmt_close finish.\n"));
 118
 119         return 0;
 120 }
 121
 122
 123 /*
 124  * dgnc_mgmt_ioctl()
 125  *
 126  * ioctl the mgmt/dpa device
 127  */
 128 #ifdef HAVE_UNLOCKED_IOCTL
 129 long dgnc_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 130 {
 131         struct inode *inode = file->f_dentry->d_inode;
 132 #else
 133 int dgnc_mgmt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
 134 {
 135 #endif
 136         unsigned long lock_flags;
 137         void __user *uarg = (void __user *) arg;
 138
 139         DPR_MGMT(("dgnc_mgmt_ioctl start.\n"));
 140
 141         switch (cmd) {
 142
 143         case DIGI_GETDD:
 144         {
 145                 /*
 146                  * This returns the total number of boards
 147                  * in the system, as well as driver version
 148                  * and has space for a reserved entry
 149                  */
 150                 struct digi_dinfo ddi;
 151
 152                 DGNC_LOCK(dgnc_global_lock, lock_flags);
 153
 154                 ddi.dinfo_nboards = dgnc_NumBoards;
 155                 sprintf(ddi.dinfo_version, "%s", DG_PART);
 156
 157                 DGNC_UNLOCK(dgnc_global_lock, lock_flags);
 158
 159                 DPR_MGMT(("DIGI_GETDD returning numboards: %d version: %s\n",
 160                         ddi.dinfo_nboards, ddi.dinfo_version));
 161
 162                 if (copy_to_user(uarg, &ddi, sizeof (ddi)))
 163                         return(-EFAULT);
 164
 165                 break;
 166         }
 167
 168         case DIGI_GETBD:
 169         {
 170                 int brd;
 171
 172                 struct digi_info di;
 173
 174                 if (copy_from_user(&brd, uarg, sizeof(int))) {
 175                         return(-EFAULT);
 176                 }
 177
 178                 DPR_MGMT(("DIGI_GETBD asking about board: %d\n", brd));
 179
 180                 if ((brd < 0) || (brd > dgnc_NumBoards) || (dgnc_NumBoards == 0))
 181                         return (-ENODEV);
 182
 183                 memset(&di, 0, sizeof(di));
 184
 185                 di.info_bdnum = brd;
 186
 187                 DGNC_LOCK(dgnc_Board[brd]->bd_lock, lock_flags);
 188
 189                 di.info_bdtype = dgnc_Board[brd]->dpatype;
 190                 di.info_bdstate = dgnc_Board[brd]->dpastatus;
 191                 di.info_ioport = 0;
 192                 di.info_physaddr = (ulong) dgnc_Board[brd]->membase;
 193                 di.info_physsize = (ulong) dgnc_Board[brd]->membase - dgnc_Board[brd]->membase_end;
 194                 if (dgnc_Board[brd]->state != BOARD_FAILED)
 195                         di.info_nports = dgnc_Board[brd]->nasync;
 196                 else
 197                         di.info_nports = 0;
 198
 199                 DGNC_UNLOCK(dgnc_Board[brd]->bd_lock, lock_flags);
 200
 201                 DPR_MGMT(("DIGI_GETBD returning type: %x state: %x ports: %x size: %x\n",
 202                         di.info_bdtype, di.info_bdstate, di.info_nports, di.info_physsize));
 203
 204                 if (copy_to_user(uarg, &di, sizeof (di)))
 205                         return (-EFAULT);
 206
 207                 break;
 208         }
 209
 210         case DIGI_GET_NI_INFO:
 211         {
 212                 struct channel_t *ch;
 213                 struct ni_info ni;
 214                 uchar mstat = 0;
 215                 uint board = 0;
 216                 uint channel = 0;
 217
 218                 if (copy_from_user(&ni, uarg, sizeof(struct ni_info))) {
 219                         return(-EFAULT);
 220                 }
 221
 222                 DPR_MGMT(("DIGI_GETBD asking about board: %d channel: %d\n",
 223                         ni.board, ni.channel));
 224
 225                 board = ni.board;
 226                 channel = ni.channel;
 227
 228                 /* Verify boundaries on board */
 229                 if ((board < 0) || (board > dgnc_NumBoards) || (dgnc_NumBoards == 0))
 230                         return (-ENODEV);
 231
 232                 /* Verify boundaries on channel */
 233                 if ((channel < 0) || (channel > dgnc_Board[board]->nasync))
 234                         return (-ENODEV);
 235
 236                 ch = dgnc_Board[board]->channels[channel];
 237
 238                 if (!ch || ch->magic != DGNC_CHANNEL_MAGIC)
 239                         return (-ENODEV);
 240
 241                 memset(&ni, 0, sizeof(ni));
 242                 ni.board = board;
 243                 ni.channel = channel;
 244
 245                 DGNC_LOCK(ch->ch_lock, lock_flags);
 246
 247                 mstat = (ch->ch_mostat | ch->ch_mistat);
 248
 249                 if (mstat & UART_MCR_DTR) {
 250                         ni.mstat |= TIOCM_DTR;
 251                         ni.dtr = TIOCM_DTR;
 252                 }
 253                 if (mstat & UART_MCR_RTS) {
 254                         ni.mstat |= TIOCM_RTS;
 255                         ni.rts = TIOCM_RTS;
 256                 }
 257                 if (mstat & UART_MSR_CTS) {
 258                         ni.mstat |= TIOCM_CTS;
 259                         ni.cts = TIOCM_CTS;
 260                 }
 261                 if (mstat & UART_MSR_RI) {
 262                         ni.mstat |= TIOCM_RI;
 263                         ni.ri = TIOCM_RI;
 264                 }
 265                 if (mstat & UART_MSR_DCD) {
 266                         ni.mstat |= TIOCM_CD;
 267                         ni.dcd = TIOCM_CD;
 268                 }
 269                 if (mstat & UART_MSR_DSR)
 270                         ni.mstat |= TIOCM_DSR;
 271
 272                 ni.iflag = ch->ch_c_iflag;
 273                 ni.oflag = ch->ch_c_oflag;
 274                 ni.cflag = ch->ch_c_cflag;
 275                 ni.lflag = ch->ch_c_lflag;
 276
 277                 if (ch->ch_digi.digi_flags & CTSPACE || ch->ch_c_cflag & CRTSCTS)
 278                         ni.hflow = 1;
 279                 else
 280                         ni.hflow = 0;
 281
 282                 if ((ch->ch_flags & CH_STOPI) || (ch->ch_flags & CH_FORCED_STOPI))
 283                         ni.recv_stopped = 1;
 284                 else
 285                         ni.recv_stopped = 0;
 286
 287                 if ((ch->ch_flags & CH_STOP) || (ch->ch_flags & CH_FORCED_STOP))
 288                         ni.xmit_stopped = 1;
 289                 else
 290                         ni.xmit_stopped = 0;
 291
 292                 ni.curtx = ch->ch_txcount;
 293                 ni.currx = ch->ch_rxcount;
 294
 295                 ni.baud = ch->ch_old_baud;
 296
 297                 DGNC_UNLOCK(ch->ch_lock, lock_flags);
 298
 299                 if (copy_to_user(uarg, &ni, sizeof(ni)))
 300                         return (-EFAULT);
 301
 302                 break;
 303         }
 304
 305
 306         }
 307
 308         DPR_MGMT(("dgnc_mgmt_ioctl finish.\n"));
 309
 310         return 0;
 311 }