249 lines
5.2 KiB
C
249 lines
5.2 KiB
C
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/*
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* Copyright 2003 Digi International (www.digi.com)
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* Scott H Kilau <Scott_Kilau at digi dot com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*/
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/*
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* This file implements the mgmt functionality for the
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* Neo and ClassicBoard based product lines.
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*/
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#include <linux/kernel.h>
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#include <linux/ctype.h>
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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#include <linux/serial_reg.h>
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#include <linux/termios.h>
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#include <linux/uaccess.h>
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#include "dgnc_driver.h"
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#include "dgnc_pci.h"
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#include "dgnc_mgmt.h"
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/* Our "in use" variables, to enforce 1 open only */
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static int dgnc_mgmt_in_use[MAXMGMTDEVICES];
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/**
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* dgnc_mgmt_open() - Open the mgmt/downld/dpa device.
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*/
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int dgnc_mgmt_open(struct inode *inode, struct file *file)
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{
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unsigned long flags;
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unsigned int minor = iminor(inode);
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int rc = 0;
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spin_lock_irqsave(&dgnc_global_lock, flags);
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if (minor >= MAXMGMTDEVICES) {
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rc = -ENXIO;
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goto out;
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}
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/* Only allow 1 open at a time on mgmt device */
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if (dgnc_mgmt_in_use[minor]) {
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rc = -EBUSY;
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goto out;
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}
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dgnc_mgmt_in_use[minor]++;
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out:
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spin_unlock_irqrestore(&dgnc_global_lock, flags);
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return rc;
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}
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/**
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* dgnc_mgmt_close() - Close the mgmt/dpa device
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*/
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int dgnc_mgmt_close(struct inode *inode, struct file *file)
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{
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unsigned long flags;
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unsigned int minor = iminor(inode);
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int rc = 0;
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spin_lock_irqsave(&dgnc_global_lock, flags);
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if (minor >= MAXMGMTDEVICES) {
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rc = -ENXIO;
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goto out;
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}
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dgnc_mgmt_in_use[minor] = 0;
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out:
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spin_unlock_irqrestore(&dgnc_global_lock, flags);
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return rc;
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}
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/**
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* dgnc_mgmt_ioctl() - Ioctl the mgmt/dpa device.
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*/
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long dgnc_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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{
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unsigned long flags;
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void __user *uarg = (void __user *)arg;
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switch (cmd) {
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case DIGI_GETDD:
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{
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/*
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* This returns the total number of boards
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* in the system, as well as driver version
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* and has space for a reserved entry
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*/
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struct digi_dinfo ddi;
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spin_lock_irqsave(&dgnc_global_lock, flags);
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memset(&ddi, 0, sizeof(ddi));
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ddi.dinfo_nboards = dgnc_num_boards;
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sprintf(ddi.dinfo_version, "%s", DG_PART);
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spin_unlock_irqrestore(&dgnc_global_lock, flags);
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if (copy_to_user(uarg, &ddi, sizeof(ddi)))
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return -EFAULT;
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break;
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}
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case DIGI_GETBD:
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{
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int brd;
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struct digi_info di;
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if (copy_from_user(&brd, uarg, sizeof(int)))
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return -EFAULT;
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if (brd < 0 || brd >= dgnc_num_boards)
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return -ENODEV;
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memset(&di, 0, sizeof(di));
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di.info_bdnum = brd;
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spin_lock_irqsave(&dgnc_board[brd]->bd_lock, flags);
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di.info_bdtype = dgnc_board[brd]->dpatype;
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di.info_bdstate = dgnc_board[brd]->dpastatus;
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di.info_ioport = 0;
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di.info_physaddr = (ulong)dgnc_board[brd]->membase;
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di.info_physsize = (ulong)dgnc_board[brd]->membase
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- dgnc_board[brd]->membase_end;
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if (dgnc_board[brd]->state != BOARD_FAILED)
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di.info_nports = dgnc_board[brd]->nasync;
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else
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di.info_nports = 0;
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spin_unlock_irqrestore(&dgnc_board[brd]->bd_lock, flags);
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if (copy_to_user(uarg, &di, sizeof(di)))
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return -EFAULT;
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break;
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}
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case DIGI_GET_NI_INFO:
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{
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struct channel_t *ch;
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struct ni_info ni;
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unsigned char mstat = 0;
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uint board = 0;
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uint channel = 0;
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if (copy_from_user(&ni, uarg, sizeof(ni)))
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return -EFAULT;
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board = ni.board;
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channel = ni.channel;
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if (board >= dgnc_num_boards)
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return -ENODEV;
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if (channel >= dgnc_board[board]->nasync)
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return -ENODEV;
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ch = dgnc_board[board]->channels[channel];
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if (!ch)
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return -ENODEV;
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memset(&ni, 0, sizeof(ni));
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ni.board = board;
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ni.channel = channel;
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spin_lock_irqsave(&ch->ch_lock, flags);
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mstat = ch->ch_mostat | ch->ch_mistat;
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if (mstat & UART_MCR_DTR) {
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ni.mstat |= TIOCM_DTR;
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ni.dtr = TIOCM_DTR;
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}
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if (mstat & UART_MCR_RTS) {
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ni.mstat |= TIOCM_RTS;
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ni.rts = TIOCM_RTS;
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}
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if (mstat & UART_MSR_CTS) {
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ni.mstat |= TIOCM_CTS;
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ni.cts = TIOCM_CTS;
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}
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if (mstat & UART_MSR_RI) {
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ni.mstat |= TIOCM_RI;
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ni.ri = TIOCM_RI;
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}
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if (mstat & UART_MSR_DCD) {
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ni.mstat |= TIOCM_CD;
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ni.dcd = TIOCM_CD;
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}
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if (mstat & UART_MSR_DSR)
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ni.mstat |= TIOCM_DSR;
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ni.iflag = ch->ch_c_iflag;
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ni.oflag = ch->ch_c_oflag;
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ni.cflag = ch->ch_c_cflag;
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ni.lflag = ch->ch_c_lflag;
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if (ch->ch_digi.digi_flags & CTSPACE ||
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ch->ch_c_cflag & CRTSCTS)
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ni.hflow = 1;
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else
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ni.hflow = 0;
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if ((ch->ch_flags & CH_STOPI) ||
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(ch->ch_flags & CH_FORCED_STOPI))
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ni.recv_stopped = 1;
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else
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ni.recv_stopped = 0;
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if ((ch->ch_flags & CH_STOP) || (ch->ch_flags & CH_FORCED_STOP))
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ni.xmit_stopped = 1;
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else
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ni.xmit_stopped = 0;
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ni.curtx = ch->ch_txcount;
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ni.currx = ch->ch_rxcount;
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ni.baud = ch->ch_old_baud;
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spin_unlock_irqrestore(&ch->ch_lock, flags);
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if (copy_to_user(uarg, &ni, sizeof(ni)))
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return -EFAULT;
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break;
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}
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}
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return 0;
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}
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