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
  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
  36 /* Our "in use" variables, to enforce 1 open only */
  37 static int dgnc_mgmt_in_use[MAXMGMTDEVICES];
  38
  39
  40 /*
  41  * dgnc_mgmt_open()
  42  *
  43  * Open the mgmt/downld/dpa device
  44  */
  45 int dgnc_mgmt_open(struct inode *inode, struct file *file)
  46 {
  47         unsigned long flags;
  48         unsigned int minor = iminor(inode);
  49
  50         spin_lock_irqsave(&dgnc_global_lock, flags);
  51
  52         /* mgmt device */
  53         if (minor < MAXMGMTDEVICES) {
  54                 /* Only allow 1 open at a time on mgmt device */
  55                 if (dgnc_mgmt_in_use[minor]) {
  56                         spin_unlock_irqrestore(&dgnc_global_lock, flags);
  57                         return -EBUSY;
  58                 }
  59                 dgnc_mgmt_in_use[minor]++;
  60         } else {
  61                 spin_unlock_irqrestore(&dgnc_global_lock, flags);
  62                 return -ENXIO;
  63         }
  64
  65         spin_unlock_irqrestore(&dgnc_global_lock, flags);
  66
  67         return 0;
  68 }
  69
  70
  71 /*
  72  * dgnc_mgmt_close()
  73  *
  74  * Open the mgmt/dpa device
  75  */
  76 int dgnc_mgmt_close(struct inode *inode, struct file *file)
  77 {
  78         unsigned long flags;
  79         unsigned int minor = iminor(inode);
  80
  81         spin_lock_irqsave(&dgnc_global_lock, flags);
  82
  83         /* mgmt device */
  84         if (minor < MAXMGMTDEVICES) {
  85                 if (dgnc_mgmt_in_use[minor])
  86                         dgnc_mgmt_in_use[minor] = 0;
  87         }
  88         spin_unlock_irqrestore(&dgnc_global_lock, flags);
  89
  90         return 0;
  91 }
  92
  93
  94 /*
  95  * dgnc_mgmt_ioctl()
  96  *
  97  * ioctl the mgmt/dpa device
  98  */
  99
 100 long dgnc_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 101 {
 102         unsigned long flags;
 103         void __user *uarg = (void __user *) arg;
 104
 105         switch (cmd) {
 106
 107         case DIGI_GETDD:
 108         {
 109                 /*
 110                  * This returns the total number of boards
 111                  * in the system, as well as driver version
 112                  * and has space for a reserved entry
 113                  */
 114                 struct digi_dinfo ddi;
 115
 116                 spin_lock_irqsave(&dgnc_global_lock, flags);
 117
 118                 ddi.dinfo_nboards = dgnc_NumBoards;
 119                 sprintf(ddi.dinfo_version, "%s", DG_PART);
 120
 121                 spin_unlock_irqrestore(&dgnc_global_lock, flags);
 122
 123                 if (copy_to_user(uarg, &ddi, sizeof(ddi)))
 124                         return -EFAULT;
 125
 126                 break;
 127         }
 128
 129         case DIGI_GETBD:
 130         {
 131                 int brd;
 132
 133                 struct digi_info di;
 134
 135                 if (copy_from_user(&brd, uarg, sizeof(int)))
 136                         return -EFAULT;
 137
 138                 if (brd < 0 || brd >= dgnc_NumBoards)
 139                         return -ENODEV;
 140
 141                 memset(&di, 0, sizeof(di));
 142
 143                 di.info_bdnum = brd;
 144
 145                 spin_lock_irqsave(&dgnc_Board[brd]->bd_lock, flags);
 146
 147                 di.info_bdtype = dgnc_Board[brd]->dpatype;
 148                 di.info_bdstate = dgnc_Board[brd]->dpastatus;
 149                 di.info_ioport = 0;
 150                 di.info_physaddr = (ulong) dgnc_Board[brd]->membase;
 151                 di.info_physsize = (ulong) dgnc_Board[brd]->membase - dgnc_Board[brd]->membase_end;
 152                 if (dgnc_Board[brd]->state != BOARD_FAILED)
 153                         di.info_nports = dgnc_Board[brd]->nasync;
 154                 else
 155                         di.info_nports = 0;
 156
 157                 spin_unlock_irqrestore(&dgnc_Board[brd]->bd_lock, flags);
 158
 159                 if (copy_to_user(uarg, &di, sizeof(di)))
 160                         return -EFAULT;
 161
 162                 break;
 163         }
 164
 165         case DIGI_GET_NI_INFO:
 166         {
 167                 struct channel_t *ch;
 168                 struct ni_info ni;
 169                 unsigned char mstat = 0;
 170                 uint board = 0;
 171                 uint channel = 0;
 172
 173                 if (copy_from_user(&ni, uarg, sizeof(ni)))
 174                         return -EFAULT;
 175
 176                 board = ni.board;
 177                 channel = ni.channel;
 178
 179                 /* Verify boundaries on board */
 180                 if (board >= dgnc_NumBoards)
 181                         return -ENODEV;
 182
 183                 /* Verify boundaries on channel */
 184                 if (channel >= dgnc_Board[board]->nasync)
 185                         return -ENODEV;
 186
 187                 ch = dgnc_Board[board]->channels[channel];
 188
 189                 if (!ch || ch->magic != DGNC_CHANNEL_MAGIC)
 190                         return -ENODEV;
 191
 192                 memset(&ni, 0, sizeof(ni));
 193                 ni.board = board;
 194                 ni.channel = channel;
 195
 196                 spin_lock_irqsave(&ch->ch_lock, flags);
 197
 198                 mstat = (ch->ch_mostat | ch->ch_mistat);
 199
 200                 if (mstat & UART_MCR_DTR) {
 201                         ni.mstat |= TIOCM_DTR;
 202                         ni.dtr = TIOCM_DTR;
 203                 }
 204                 if (mstat & UART_MCR_RTS) {
 205                         ni.mstat |= TIOCM_RTS;
 206                         ni.rts = TIOCM_RTS;
 207                 }
 208                 if (mstat & UART_MSR_CTS) {
 209                         ni.mstat |= TIOCM_CTS;
 210                         ni.cts = TIOCM_CTS;
 211                 }
 212                 if (mstat & UART_MSR_RI) {
 213                         ni.mstat |= TIOCM_RI;
 214                         ni.ri = TIOCM_RI;
 215                 }
 216                 if (mstat & UART_MSR_DCD) {
 217                         ni.mstat |= TIOCM_CD;
 218                         ni.dcd = TIOCM_CD;
 219                 }
 220                 if (mstat & UART_MSR_DSR)
 221                         ni.mstat |= TIOCM_DSR;
 222
 223                 ni.iflag = ch->ch_c_iflag;
 224                 ni.oflag = ch->ch_c_oflag;
 225                 ni.cflag = ch->ch_c_cflag;
 226                 ni.lflag = ch->ch_c_lflag;
 227
 228                 if (ch->ch_digi.digi_flags & CTSPACE ||
 229                     ch->ch_c_cflag & CRTSCTS)
 230                         ni.hflow = 1;
 231                 else
 232                         ni.hflow = 0;
 233
 234                 if ((ch->ch_flags & CH_STOPI) ||
 235                     (ch->ch_flags & CH_FORCED_STOPI))
 236                         ni.recv_stopped = 1;
 237                 else
 238                         ni.recv_stopped = 0;
 239
 240                 if ((ch->ch_flags & CH_STOP) || (ch->ch_flags & CH_FORCED_STOP))
 241                         ni.xmit_stopped = 1;
 242                 else
 243                         ni.xmit_stopped = 0;
 244
 245                 ni.curtx = ch->ch_txcount;
 246                 ni.currx = ch->ch_rxcount;
 247
 248                 ni.baud = ch->ch_old_baud;
 249
 250                 spin_unlock_irqrestore(&ch->ch_lock, flags);
 251
 252                 if (copy_to_user(uarg, &ni, sizeof(ni)))
 253                         return -EFAULT;
 254
 255                 break;
 256         }
 257
 258
 259         }
 260
 261         return 0;
 262 }