patch-2.1.37 linux/drivers/char/epca.c
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- Lines: 4314
- Date:
Mon May 12 10:35:39 1997
- Orig file:
v2.1.36/linux/drivers/char/epca.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.1.36/linux/drivers/char/epca.c linux/drivers/char/epca.c
@@ -0,0 +1,4313 @@
+/*
+
+
+ Copyright (C) 1996 Digi International.
+
+ For technical support please email digiLinux@dgii.com or
+ call Digi tech support at (612) 912-3456
+
+ Much of this design and code came from epca.c which was
+ copyright (C) 1994, 1995 Troy De Jongh, and subsquently
+ modified by David Nugent, Christoph Lameter, Mike McLagan.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+--------------------------------------------------------------------------- */
+/* See README.epca for change history --DAT*/
+
+
+#ifdef MODVERSIONS
+#define MODULE
+#endif
+
+/* -----------------------------------------------------------------------
+ This way modules should work regardless if they defined MODULE or
+ MODVERSIONS. (MODVERSIONS is for the newer kernels ...
+-------------------------------------------------------------------------- */
+
+#ifdef MODULE
+#include <linux/config.h>
+#endif /* MODULE */
+
+#include <linux/version.h>
+
+#define NEW_MODULES
+
+#ifdef NEW_MODULES
+#ifdef MODVERSIONS
+#include <linux/modversions.h>
+#endif /* MODVERSIONS */
+#endif /* NEW_MODULES */
+
+#ifdef MODULE
+#include <linux/module.h>
+#endif /* MODULE */
+
+
+#include <linux/errno.h>
+#include <linux/major.h>
+#include <linux/delay.h>
+#include <linux/tty.h>
+#include <linux/serial.h>
+#include <linux/tty_driver.h>
+#include <linux/kernel.h>
+#include <linux/signal.h>
+#include <linux/malloc.h>
+#include <linux/mm.h>
+#include <linux/ctype.h>
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/segment.h>
+
+
+#include <asm/bitops.h>
+
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/tty_flip.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/major.h>
+#include <linux/ioport.h>
+
+#ifdef MODULE
+#ifndef NEW_MODULES
+char kernel_version[]=UTS_RELEASE;
+#endif /* NEW_MODULE */
+#endif /* MODULE */
+
+
+#ifdef CONFIG_PCI
+#define ENABLE_PCI
+#endif /* CONFIG_PCI */
+
+
+
+#include <asm/uaccess.h>
+#define putUser(arg1, arg2) put_user(arg1, (unsigned long *)arg2)
+#define getUser(arg1, arg2) get_user(arg1, (unsigned int *)arg2)
+
+
+
+#ifdef ENABLE_PCI
+#include <linux/bios32.h>
+#include <linux/pci.h>
+#include <linux/digiPCI.h>
+#endif /* ENABLE_PCI */
+
+#include <linux/digi1.h>
+#include <linux/digiFep1.h>
+#include <linux/epca.h>
+#include <linux/epcaconfig.h>
+
+/* ---------------------- Begin defines ------------------------ */
+
+#define VERSION "1.1.0"
+
+/* This major needs to be submitted to Linux to join the majors list */
+
+#define DIGIINFOMAJOR 35 /* For Digi specific ioctl */
+
+
+#define MIN(a,b) ((a) < (b) ? (a) : (b))
+#define MAXCARDS 7
+#define epcaassert(x, msg) if (!(x)) epca_error(__LINE__, msg)
+
+/* ----------------- Begin global definitions ------------------- */
+
+static char mesg[100];
+static int pc_refcount, nbdevs = 0, num_cards = 0, liloconfig = 0;
+static int digi_poller_inhibited = 1 ;
+
+static int setup_error_code = 0;
+static int invalid_lilo_config = 0;
+
+/* -----------------------------------------------------------------------
+ MAXBOARDS is typically 12, but ISA and EISA cards are restricted to
+ 7 below.
+--------------------------------------------------------------------------*/
+static struct board_info boards[7];
+
+
+/* ------------- Begin structures used for driver registeration ---------- */
+
+struct tty_driver pc_driver;
+struct tty_driver pc_callout;
+struct tty_driver pc_info;
+
+/* The below structures are used to initialize the tty_driver structures. */
+
+/* -------------------------------------------------------------------------
+ Note : MAX_ALLOC is currently limited to 0x100. This restriction is
+ placed on us by Linux not Digi.
+----------------------------------------------------------------------------*/
+static struct tty_struct *pc_table[MAX_ALLOC];
+static struct termios *pc_termios[MAX_ALLOC];
+static struct termios *pc_termios_locked[MAX_ALLOC];
+
+
+/* ------------------ Begin Digi specific structures -------------------- */
+
+/* ------------------------------------------------------------------------
+ digi_channels represents an array of structures that keep track of
+ each channel of the Digi product. Information such as transmit and
+ receive pointers, termio data, and signal definitions (DTR, CTS, etc ...)
+ are stored here. This structure is NOT used to overlay the cards
+ physical channel structure.
+-------------------------------------------------------------------------- */
+
+static struct channel digi_channels[MAX_ALLOC];
+
+/* ------------------------------------------------------------------------
+ card_ptr is an array used to hold the address of the
+ first channel structure of each card. This array will hold
+ the addresses of various channels located in digi_channels.
+-------------------------------------------------------------------------- */
+static struct channel *card_ptr[MAXCARDS];
+
+/* ---------------------- Begin function prototypes --------------------- */
+
+/* ----------------------------------------------------------------------
+ Begin generic memory functions. These functions will be alias
+ (point at) more specific functions dependant on the board being
+ configured.
+----------------------------------------------------------------------- */
+
+
+#ifdef MODULE
+int init_module(void);
+void cleanup_module(void);
+#endif /* MODULE */
+
+static inline void memwinon(struct board_info *b, unsigned int win);
+static inline void memwinoff(struct board_info *b, unsigned int win);
+static inline void globalwinon(struct channel *ch);
+static inline void rxwinon(struct channel *ch);
+static inline void txwinon(struct channel *ch);
+static inline void memoff(struct channel *ch);
+static inline void assertgwinon(struct channel *ch);
+static inline void assertmemoff(struct channel *ch);
+
+/* ---- Begin more 'specific' memory functions for cx_like products --- */
+
+static inline void pcxem_memwinon(struct board_info *b, unsigned int win);
+static inline void pcxem_memwinoff(struct board_info *b, unsigned int win);
+static inline void pcxem_globalwinon(struct channel *ch);
+static inline void pcxem_rxwinon(struct channel *ch);
+static inline void pcxem_txwinon(struct channel *ch);
+static inline void pcxem_memoff(struct channel *ch);
+
+/* ------ Begin more 'specific' memory functions for the pcxe ------- */
+
+static inline void pcxe_memwinon(struct board_info *b, unsigned int win);
+static inline void pcxe_memwinoff(struct board_info *b, unsigned int win);
+static inline void pcxe_globalwinon(struct channel *ch);
+static inline void pcxe_rxwinon(struct channel *ch);
+static inline void pcxe_txwinon(struct channel *ch);
+static inline void pcxe_memoff(struct channel *ch);
+
+/* ---- Begin more 'specific' memory functions for the pc64xe and pcxi ---- */
+/* Note : pc64xe and pcxi share the same windowing routines */
+
+static inline void pcxi_memwinon(struct board_info *b, unsigned int win);
+static inline void pcxi_memwinoff(struct board_info *b, unsigned int win);
+static inline void pcxi_globalwinon(struct channel *ch);
+static inline void pcxi_rxwinon(struct channel *ch);
+static inline void pcxi_txwinon(struct channel *ch);
+static inline void pcxi_memoff(struct channel *ch);
+
+/* - Begin 'specific' do nothing memory functions needed for some cards - */
+
+static inline void dummy_memwinon(struct board_info *b, unsigned int win);
+static inline void dummy_memwinoff(struct board_info *b, unsigned int win);
+static inline void dummy_globalwinon(struct channel *ch);
+static inline void dummy_rxwinon(struct channel *ch);
+static inline void dummy_txwinon(struct channel *ch);
+static inline void dummy_memoff(struct channel *ch);
+static inline void dummy_assertgwinon(struct channel *ch);
+static inline void dummy_assertmemoff(struct channel *ch);
+
+/* ------------------- Begin declare functions ----------------------- */
+
+static inline struct channel *verifyChannel(register struct tty_struct *);
+static inline void pc_sched_event(struct channel *, int);
+static void epca_error(int, char *);
+static void pc_close(struct tty_struct *, struct file *);
+static void shutdown(struct channel *);
+static void pc_hangup(struct tty_struct *);
+static void pc_put_char(struct tty_struct *, unsigned char);
+static int pc_write_room(struct tty_struct *);
+static int pc_chars_in_buffer(struct tty_struct *);
+static void pc_flush_buffer(struct tty_struct *);
+static void pc_flush_chars(struct tty_struct *);
+static int block_til_ready(struct tty_struct *, struct file *,
+ struct channel *);
+static int pc_open(struct tty_struct *, struct file *);
+static void post_fep_init(unsigned int crd);
+static void epcapoll(unsigned long);
+static void doevent(int);
+static void fepcmd(struct channel *, int, int, int, int, int);
+static unsigned termios2digi_h(struct channel *ch, unsigned);
+static unsigned termios2digi_i(struct channel *ch, unsigned);
+static unsigned termios2digi_c(struct channel *ch, unsigned);
+static void epcaparam(struct tty_struct *, struct channel *);
+static void receive_data(struct channel *);
+static int pc_ioctl(struct tty_struct *, struct file *,
+ unsigned int, unsigned long);
+static void pc_set_termios(struct tty_struct *, struct termios *);
+static void do_softint(void *);
+static void pc_stop(struct tty_struct *);
+static void pc_start(struct tty_struct *);
+static void pc_throttle(struct tty_struct * tty);
+static void pc_unthrottle(struct tty_struct *tty);
+static void digi_send_break(struct channel *ch, int msec);
+static void setup_empty_event(struct tty_struct *tty, struct channel *ch);
+void epca_setup(char *, int *);
+void console_print(const char *);
+
+static int get_termio(struct tty_struct *, struct termio *);
+static int pc_write(struct tty_struct *, int, const unsigned char *, int);
+int pc_init(void);
+
+#ifdef ENABLE_PCI
+static int init_PCI(int);
+static int get_PCI_configuration(char, char, unsigned int *, unsigned int *,
+ unsigned int *, unsigned int *,
+ unsigned int *, unsigned int *);
+#endif /* ENABLE_PCI */
+
+
+/* ------------------------------------------------------------------
+ Table of functions for each board to handle memory. Mantaining
+ parallelism is a *very* good idea here. The idea is for the
+ runtime code to blindly call these functions, not knowing/caring
+ about the underlying hardware. This stuff should contain no
+ conditionals; if more functionality is needed a different entry
+ should be established. These calls are the interface calls and
+ are the only functions that should be accessed. Anyone caught
+ making direct calls deserves what they get.
+-------------------------------------------------------------------- */
+
+static inline void memwinon(struct board_info *b, unsigned int win)
+{
+ (b->memwinon)(b, win);
+}
+
+static inline void memwinoff(struct board_info *b, unsigned int win)
+{
+ (b->memwinoff)(b, win);
+}
+
+static inline void globalwinon(struct channel *ch)
+{
+ (ch->board->globalwinon)(ch);
+}
+
+static inline void rxwinon(struct channel *ch)
+{
+ (ch->board->rxwinon)(ch);
+}
+
+static inline void txwinon(struct channel *ch)
+{
+ (ch->board->txwinon)(ch);
+}
+
+static inline void memoff(struct channel *ch)
+{
+ (ch->board->memoff)(ch);
+}
+static inline void assertgwinon(struct channel *ch)
+{
+ (ch->board->assertgwinon)(ch);
+}
+
+static inline void assertmemoff(struct channel *ch)
+{
+ (ch->board->assertmemoff)(ch);
+}
+
+/* ---------------------------------------------------------
+ PCXEM windowing is the same as that used in the PCXR
+ and CX series cards.
+------------------------------------------------------------ */
+
+static inline void pcxem_memwinon(struct board_info *b, unsigned int win)
+{
+ outb_p(FEPWIN|win, (int)b->port + 1);
+}
+
+static inline void pcxem_memwinoff(struct board_info *b, unsigned int win)
+{
+ outb_p(0, (int)b->port + 1);
+}
+
+static inline void pcxem_globalwinon(struct channel *ch)
+{
+ outb_p( FEPWIN, (int)ch->board->port + 1);
+}
+
+static inline void pcxem_rxwinon(struct channel *ch)
+{
+ outb_p(ch->rxwin, (int)ch->board->port + 1);
+}
+
+static inline void pcxem_txwinon(struct channel *ch)
+{
+ outb_p(ch->txwin, (int)ch->board->port + 1);
+}
+
+static inline void pcxem_memoff(struct channel *ch)
+{
+ outb_p(0, (int)ch->board->port + 1);
+}
+
+/* ----------------- Begin pcxe memory window stuff ------------------ */
+
+static inline void pcxe_memwinon(struct board_info *b, unsigned int win)
+{
+ outb_p(FEPWIN | win, (int)b->port + 1);
+}
+
+static inline void pcxe_memwinoff(struct board_info *b, unsigned int win)
+{
+ outb_p(inb((int)b->port) & ~FEPMEM,
+ (int)b->port + 1);
+ outb_p(0, (int)b->port + 1);
+}
+
+static inline void pcxe_globalwinon(struct channel *ch)
+{
+ outb_p( FEPWIN, (int)ch->board->port + 1);
+}
+
+static inline void pcxe_rxwinon(struct channel *ch)
+{
+ outb_p(ch->rxwin, (int)ch->board->port + 1);
+}
+
+static inline void pcxe_txwinon(struct channel *ch)
+{
+ outb_p(ch->txwin, (int)ch->board->port + 1);
+}
+
+static inline void pcxe_memoff(struct channel *ch)
+{
+ outb_p(0, (int)ch->board->port);
+ outb_p(0, (int)ch->board->port + 1);
+}
+
+/* ------------- Begin pc64xe and pcxi memory window stuff -------------- */
+
+static inline void pcxi_memwinon(struct board_info *b, unsigned int win)
+{
+ outb_p(inb((int)b->port) | FEPMEM, (int)b->port);
+}
+
+static inline void pcxi_memwinoff(struct board_info *b, unsigned int win)
+{
+ outb_p(inb((int)b->port) & ~FEPMEM, (int)b->port);
+}
+
+static inline void pcxi_globalwinon(struct channel *ch)
+{
+ outb_p(FEPMEM, (int)ch->board->port);
+}
+
+static inline void pcxi_rxwinon(struct channel *ch)
+{
+ outb_p(FEPMEM, (int)ch->board->port);
+}
+
+static inline void pcxi_txwinon(struct channel *ch)
+{
+ outb_p(FEPMEM, (int)ch->board->port);
+}
+
+static inline void pcxi_memoff(struct channel *ch)
+{
+ outb_p(0, (int)ch->board->port);
+}
+
+static inline void pcxi_assertgwinon(struct channel *ch)
+{
+ epcaassert(inb((int)ch->board->port) & FEPMEM, "Global memory off");
+}
+
+static inline void pcxi_assertmemoff(struct channel *ch)
+{
+ epcaassert(!(inb((int)ch->board->port) & FEPMEM), "Memory on");
+}
+
+
+/* ----------------------------------------------------------------------
+ Not all of the cards need specific memory windowing routines. Some
+ cards (Such as PCI) needs no windowing routines at all. We provide
+ these do nothing routines so that the same code base can be used.
+ The driver will ALWAYS call a windowing routine if it thinks it needs
+ to; regardless of the card. However, dependant on the card the routine
+ may or may not do anything.
+---------------------------------------------------------------------------*/
+
+static inline void dummy_memwinon(struct board_info *b, unsigned int win)
+{
+}
+
+static inline void dummy_memwinoff(struct board_info *b, unsigned int win)
+{
+}
+
+static inline void dummy_globalwinon(struct channel *ch)
+{
+}
+
+static inline void dummy_rxwinon(struct channel *ch)
+{
+}
+
+static inline void dummy_txwinon(struct channel *ch)
+{
+}
+
+static inline void dummy_memoff(struct channel *ch)
+{
+}
+
+static inline void dummy_assertgwinon(struct channel *ch)
+{
+}
+
+static inline void dummy_assertmemoff(struct channel *ch)
+{
+}
+
+/* ----------------- Begin verifyChannel function ----------------------- */
+static inline struct channel *verifyChannel(register struct tty_struct *tty)
+{ /* Begin verifyChannel */
+
+ /* --------------------------------------------------------------------
+ This routine basically provides a sanity check. It insures that
+ the channel returned is within the proper range of addresses as
+ well as properly initialized. If some bogus info gets passed in
+ through tty->driver_data this should catch it.
+ --------------------------------------------------------------------- */
+
+ if (tty)
+ { /* Begin if tty */
+
+ register struct channel *ch = (struct channel *)tty->driver_data;
+
+ if ((ch >= &digi_channels[0]) && (ch < &digi_channels[nbdevs]))
+ {
+ if (ch->magic == EPCA_MAGIC)
+ return ch;
+ }
+
+ } /* End if tty */
+
+ /* Else return a NULL for invalid */
+ return NULL;
+
+} /* End verifyChannel */
+
+/* ------------------ Begin pc_sched_event ------------------------- */
+
+static inline void pc_sched_event(struct channel *ch, int event)
+{ /* Begin pc_sched_event */
+
+
+ /* ----------------------------------------------------------------------
+ We call this to schedule interrupt processing on some event. The
+ kernel sees our request and calls the related routine in OUR driver.
+ -------------------------------------------------------------------------*/
+
+ ch->event |= 1 << event;
+ queue_task(&ch->tqueue, &tq_scheduler);
+
+
+} /* End pc_sched_event */
+
+/* ------------------ Begin epca_error ------------------------- */
+
+static void epca_error(int line, char *msg)
+{ /* Begin epca_error */
+
+ printk(KERN_ERR "epca_error (Digi): line = %d %s\n",line,msg);
+ return;
+
+} /* End epca_error */
+
+/* ------------------ Begin pc_close ------------------------- */
+static void pc_close(struct tty_struct * tty, struct file * filp)
+{ /* Begin pc_close */
+
+ struct channel *ch;
+ unsigned long flags;
+
+ if (tty->driver.subtype == SERIAL_TYPE_INFO)
+ {
+ return;
+ }
+
+
+ /* ---------------------------------------------------------
+ verifyChannel returns the channel from the tty struct
+ if it is valid. This serves as a sanity check.
+ ------------------------------------------------------------- */
+
+ if ((ch = verifyChannel(tty)) != NULL)
+ { /* Begin if ch != NULL */
+
+ save_flags(flags);
+ cli();
+
+ if (tty_hung_up_p(filp))
+ {
+ restore_flags(flags);
+ return;
+ }
+
+ /* Check to see if the channel is open more than once */
+ if (ch->count-- > 1)
+ { /* Begin channel is open more than once */
+
+ /* -------------------------------------------------------------
+ Return without doing anything. Someone might still be using
+ the channel.
+ ---------------------------------------------------------------- */
+
+ restore_flags(flags);
+ return;
+ } /* End channel is open more than once */
+
+ /* Port open only once go ahead with shutdown & reset */
+
+ if (ch->count < 0)
+ {
+ ch->count = 0;
+ }
+
+ /* ---------------------------------------------------------------
+ Let the rest of the driver know the channel is being closed.
+ This becomes important if an open is attempted before close
+ is finished.
+ ------------------------------------------------------------------ */
+
+ ch->asyncflags |= ASYNC_CLOSING;
+
+ /* -------------------------------------------------------------
+ Save the termios structure, since this port may have
+ separate termios for callout and dialin.
+ --------------------------------------------------------------- */
+
+ if (ch->asyncflags & ASYNC_NORMAL_ACTIVE)
+ ch->normal_termios = *tty->termios;
+
+ if (ch->asyncflags & ASYNC_CALLOUT_ACTIVE)
+ ch->callout_termios = *tty->termios;
+
+ tty->closing = 1;
+
+ if (ch->asyncflags & ASYNC_INITIALIZED)
+ {
+ /* Setup an event to indicate when the transmit buffer empties */
+ setup_empty_event(tty, ch);
+ tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
+ }
+
+ if (tty->driver.flush_buffer)
+ tty->driver.flush_buffer(tty);
+
+ if (tty->ldisc.flush_buffer)
+ tty->ldisc.flush_buffer(tty);
+
+ shutdown(ch);
+ tty->closing = 0;
+ ch->event = 0;
+ ch->tty = NULL;
+
+ if (ch->blocked_open)
+ { /* Begin if blocked_open */
+
+ if (ch->close_delay)
+ {
+ current->state = TASK_INTERRUPTIBLE;
+ current->timeout = jiffies + ch->close_delay;
+ schedule();
+ }
+
+ wake_up_interruptible(&ch->open_wait);
+
+ } /* End if blocked_open */
+
+ ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED |
+ ASYNC_CALLOUT_ACTIVE | ASYNC_CLOSING);
+ wake_up_interruptible(&ch->close_wait);
+
+#ifdef MODULE
+ MOD_DEC_USE_COUNT;
+#endif
+
+ restore_flags(flags);
+
+ } /* End if ch != NULL */
+
+} /* End pc_close */
+
+/* ------------------ Begin shutdown ------------------------- */
+
+static void shutdown(struct channel *ch)
+{ /* Begin shutdown */
+
+ unsigned long flags;
+ struct tty_struct *tty;
+ volatile struct board_chan *bc;
+
+ if (!(ch->asyncflags & ASYNC_INITIALIZED))
+ return;
+
+ save_flags(flags);
+ cli();
+ globalwinon(ch);
+
+ bc = ch->brdchan;
+
+ /* ------------------------------------------------------------------
+ In order for an event to be generated on the receipt of data the
+ idata flag must be set. Since we are shutting down, this is not
+ necessary clear this flag.
+ --------------------------------------------------------------------- */
+
+ if (bc)
+ bc->idata = 0;
+
+ tty = ch->tty;
+
+ /* ----------------------------------------------------------------
+ If we're a modem control device and HUPCL is on, drop RTS & DTR.
+ ------------------------------------------------------------------ */
+
+ if (tty->termios->c_cflag & HUPCL)
+ {
+ ch->omodem &= ~(ch->m_rts | ch->m_dtr);
+ fepcmd(ch, SETMODEM, 0, ch->m_dtr | ch->m_rts, 10, 1);
+ }
+
+ memoff(ch);
+
+ /* ------------------------------------------------------------------
+ The channel has officialy been closed. The next time it is opened
+ it will have to reinitialized. Set a flag to indicate this.
+ ---------------------------------------------------------------------- */
+
+ /* Prevent future Digi programmed interrupts from coming active */
+
+ ch->asyncflags &= ~ASYNC_INITIALIZED;
+ restore_flags(flags);
+
+} /* End shutdown */
+
+/* ------------------ Begin pc_hangup ------------------------- */
+
+static void pc_hangup(struct tty_struct *tty)
+{ /* Begin pc_hangup */
+
+ struct channel *ch;
+
+ /* ---------------------------------------------------------
+ verifyChannel returns the channel from the tty struct
+ if it is valid. This serves as a sanity check.
+ ------------------------------------------------------------- */
+
+ if ((ch = verifyChannel(tty)) != NULL)
+ { /* Begin if ch != NULL */
+
+ unsigned long flags;
+
+ save_flags(flags);
+ cli();
+ if (tty->driver.flush_buffer)
+ tty->driver.flush_buffer(tty);
+
+ if (tty->ldisc.flush_buffer)
+ tty->ldisc.flush_buffer(tty);
+
+ shutdown(ch);
+
+#ifdef MODULE
+ if (ch->count)
+ MOD_DEC_USE_COUNT;
+#endif /* MODULE */
+
+
+ ch->tty = NULL;
+ ch->event = 0;
+ ch->count = 0;
+ restore_flags(flags);
+ ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED | ASYNC_CALLOUT_ACTIVE);
+ wake_up_interruptible(&ch->open_wait);
+
+ } /* End if ch != NULL */
+
+} /* End pc_hangup */
+
+/* ------------------ Begin pc_write ------------------------- */
+
+static int pc_write(struct tty_struct * tty, int from_user,
+ const unsigned char *buf, int bytesAvailable)
+{ /* Begin pc_write */
+
+ register unsigned int head, tail;
+ register int dataLen;
+ register int size;
+ register int amountCopied;
+
+
+ struct channel *ch;
+ unsigned long flags;
+ int remain;
+ volatile struct board_chan *bc;
+
+
+ /* ----------------------------------------------------------------
+ pc_write is primarily called directly by the kernel routine
+ tty_write (Though it can also be called by put_char) found in
+ tty_io.c. pc_write is passed a line discipline buffer where
+ the data to be written out is stored. The line discipline
+ implementation itself is done at the kernel level and is not
+ brought into the driver.
+ ------------------------------------------------------------------- */
+
+ /* Stop users from hurting themselves on control minor */
+
+ if (tty->driver.subtype == SERIAL_TYPE_INFO)
+ {
+ return (0) ;
+ }
+
+ /* ---------------------------------------------------------
+ verifyChannel returns the channel from the tty struct
+ if it is valid. This serves as a sanity check.
+ ------------------------------------------------------------- */
+
+ if ((ch = verifyChannel(tty)) == NULL)
+ return 0;
+
+ /* Make a pointer to the channel data structure found on the board. */
+
+ bc = ch->brdchan;
+ size = ch->txbufsize;
+
+ if (from_user)
+ { /* Begin from_user */
+
+ save_flags(flags);
+ cli();
+
+ globalwinon(ch);
+
+ /* -----------------------------------------------------------------
+ Anding against size will wrap the pointer back to its begining
+ position if it is necessary. This will only work if size is
+ a power of 2 which should always be the case. Size is determined
+ by the cards on board FEP/OS.
+ -------------------------------------------------------------------- */
+
+ /* head refers to the next empty location in which data may be stored */
+
+ head = bc->tin & (size - 1);
+
+ /* tail refers to the next data byte to be transmitted */
+
+ tail = bc->tout;
+
+ /* Consider changing this to a do statement to make sure */
+
+ if (tail != bc->tout)
+ tail = bc->tout;
+
+ /* ------------------------------------------------------------------
+ Anding against size will wrap the pointer back to its begining
+ position if it is necessary. This will only work if size is
+ a power of 2 which should always be the case. Size is determined
+ by the cards on board FEP/OS.
+ --------------------------------------------------------------------- */
+
+ tail &= (size - 1);
+
+ /* -----------------------------------------------------------------
+ Two situations can affect how space in the transmit buffer
+ is calculated. You can have a situation where the transmit
+ in pointer (tin) head has wrapped around and actually has a
+ lower address than the transmit out pointer (tout) tail; or
+ the transmit in pointer (tin) head will not be wrapped around
+ yet, and have a higher address than the transmit out pointer
+ (tout) tail. Obviously space available in the transmit buffer
+ is calculated differently for each case.
+
+ Example 1:
+
+ Consider a 10 byte buffer where head is a pointer to the next
+ empty location in the buffer and tail is a pointer to the next
+ byte to transmit. In this example head will not have wrapped
+ around and therefore head > tail.
+
+ 0 1 2 3 4 5 6 7 8 9
+ tail head
+
+ The above diagram shows that buffer locations 2,3,4,5 and 6 have
+ data to be transmited, while head points at the next empty
+ location. To calculate how much space is available first we have
+ to determine if the head pointer (tin) has wrapped. To do this
+ compare the head pointer to the tail pointer, If head is equal
+ or greater than tail; then it has not wrapped; and the space may
+ be calculated by subtracting tail from head and then subtracting
+ that value from the buffers size. A one is subtracted from the
+ new value to indicate how much space is available between the
+ head pointer and end of buffer; as well as the space between the
+ begining of the buffer and the tail. If the head is not greater
+ or equal to the tail this indicates that the head has wrapped
+ around to the begining of the buffer. To calculate the space
+ available in this case simply subtract head from tail. This new
+ value minus one represents the space available betwwen the head
+ and tail pointers. In this example head (7) is greater than tail (2)
+ and therefore has not wrapped around. We find the space by first
+ subtracting tail from head (7-2=5). We then subtract this value
+ from the buffer size of ten and subtract one (10-5-1=4). The space
+ remaining is 4 bytes.
+
+ Example 2:
+
+ Consider a 10 byte buffer where head is a pointer to the next
+ empty location in the buffer and tail is a pointer to the next
+ byte to transmit. In this example head will wrapped around and
+ therefore head < tail.
+
+ 0 1 2 3 4 5 6 7 8 9
+ head tail
+
+ The above diagram shows that buffer locations 7,8,9,0 and 1 have
+ data to be transmited, while head points at the next empty
+ location. To find the space available we compare head to tail. If
+ head is not equal to, or greater than tail this indicates that head
+ has wrapped around. In this case head (2) is not equal to, or
+ greater than tail (7) and therefore has already wrapped around. To
+ calculate the available space between the two pointers we subtract
+ head from tail (7-2=5). We then subtract one from this new value
+ (5-1=4). We have 5 bytes empty remaining in the buffer. Unlike the
+ previous example these five bytes are located between the head and
+ tail pointers.
+
+ ----------------------------------------------------------------------- */
+
+ dataLen = (head >= tail) ? (size - (head - tail) - 1) : (tail - head - 1);
+
+ /* ----------------------------------------------------------------------
+ In this case bytesAvailable has been passed into pc_write and
+ represents the amount of data that needs to be written. dataLen
+ represents the amount of space available on the card. Whichever
+ value is smaller will be the amount actually written.
+ bytesAvailable will then take on this newly calculated value.
+ ---------------------------------------------------------------------- */
+
+ bytesAvailable = MIN(dataLen, bytesAvailable);
+
+ /* First we read the data in from the file system into a temp buffer */
+
+ if (bytesAvailable)
+ { /* Begin bytesAvailable */
+
+ /* Can the user buffer be accessed at the moment ? */
+ if (verify_area(VERIFY_READ, (char*)buf, bytesAvailable))
+ bytesAvailable = 0; /* Can't do; try again later */
+ else /* Evidently it can, began transmission */
+ { /* Begin if area verified */
+ /* ---------------------------------------------------------------
+ The below function reads data from user memory. This routine
+ can not be used in an interrupt routine. (Because it may
+ generate a page fault) It can only be called while we can the
+ user context is accessible.
+
+ The prototype is :
+ inline void copy_from_user(void * to, const void * from,
+ unsigned long count);
+
+ You must include <asm/segment.h>
+ I also think (Check hackers guide) that optimization must
+ be turned ON. (Which sounds strange to me...)
+
+ Remember copy_from_user WILL generate a page fault if the
+ user memory being accessed has been swapped out. This can
+ cause this routine to temporarily sleep while this page
+ fault is occuring.
+
+ ----------------------------------------------------------------- */
+
+ copy_from_user(ch->tmp_buf, buf, bytesAvailable);
+
+ } /* End if area verified */
+
+ } /* End bytesAvailable */
+
+ /* ------------------------------------------------------------------
+ Set buf to this address for the moment. tmp_buf was allocated in
+ post_fep_init.
+ --------------------------------------------------------------------- */
+ buf = ch->tmp_buf;
+ memoff(ch);
+ restore_flags(flags);
+
+ } /* End from_user */
+
+ /* All data is now local */
+
+ amountCopied = 0;
+ save_flags(flags);
+ cli();
+
+ globalwinon(ch);
+
+ head = bc->tin & (size - 1);
+ tail = bc->tout;
+
+ if (tail != bc->tout)
+ tail = bc->tout;
+ tail &= (size - 1);
+
+ /* If head >= tail, head has not wrapped around. */
+ if (head >= tail)
+ { /* Begin head has not wrapped */
+
+ /* ---------------------------------------------------------------
+ remain (much like dataLen above) represents the total amount of
+ space available on the card for data. Here dataLen represents
+ the space existing between the head pointer and the end of
+ buffer. This is important because a memcpy cannot be told to
+ automatically wrap around when it hits the buffer end.
+ ------------------------------------------------------------------ */
+
+ dataLen = size - head;
+ remain = size - (head - tail) - 1;
+
+ } /* End head has not wrapped */
+ else
+ { /* Begin head has wrapped around */
+
+ remain = tail - head - 1;
+ dataLen = remain;
+
+ } /* End head has wrapped around */
+
+ /* -------------------------------------------------------------------
+ Check the space on the card. If we have more data than
+ space; reduce the amount of data to fit the space.
+ ---------------------------------------------------------------------- */
+
+ bytesAvailable = MIN(remain, bytesAvailable);
+
+ txwinon(ch);
+ while (bytesAvailable > 0)
+ { /* Begin while there is data to copy onto card */
+
+ /* -----------------------------------------------------------------
+ If head is not wrapped, the below will make sure the first
+ data copy fills to the end of card buffer.
+ ------------------------------------------------------------------- */
+
+ dataLen = MIN(bytesAvailable, dataLen);
+ memcpy(ch->txptr + head, buf, dataLen);
+ buf += dataLen;
+ head += dataLen;
+ amountCopied += dataLen;
+ bytesAvailable -= dataLen;
+
+ if (head >= size)
+ {
+ head = 0;
+ dataLen = tail;
+ }
+
+ } /* End while there is data to copy onto card */
+
+ ch->statusflags |= TXBUSY;
+ globalwinon(ch);
+ bc->tin = head;
+
+ if ((ch->statusflags & LOWWAIT) == 0)
+ {
+ ch->statusflags |= LOWWAIT;
+ bc->ilow = 1;
+ }
+ memoff(ch);
+ restore_flags(flags);
+
+ return(amountCopied);
+
+} /* End pc_write */
+
+/* ------------------ Begin pc_put_char ------------------------- */
+
+static void pc_put_char(struct tty_struct *tty, unsigned char c)
+{ /* Begin pc_put_char */
+
+
+ pc_write(tty, 0, &c, 1);
+ return;
+
+} /* End pc_put_char */
+
+/* ------------------ Begin pc_write_room ------------------------- */
+
+static int pc_write_room(struct tty_struct *tty)
+{ /* Begin pc_write_room */
+
+ int remain;
+ struct channel *ch;
+ unsigned long flags;
+ unsigned int head, tail;
+ volatile struct board_chan *bc;
+
+ remain = 0;
+
+ /* ---------------------------------------------------------
+ verifyChannel returns the channel from the tty struct
+ if it is valid. This serves as a sanity check.
+ ------------------------------------------------------------- */
+
+ if ((ch = verifyChannel(tty)) != NULL)
+ {
+ save_flags(flags);
+ cli();
+ globalwinon(ch);
+
+ bc = ch->brdchan;
+ head = bc->tin & (ch->txbufsize - 1);
+ tail = bc->tout;
+
+ if (tail != bc->tout)
+ tail = bc->tout;
+ /* Wrap tail if necessary */
+ tail &= (ch->txbufsize - 1);
+
+ if ((remain = tail - head - 1) < 0 )
+ remain += ch->txbufsize;
+
+ if (remain && (ch->statusflags & LOWWAIT) == 0)
+ {
+ ch->statusflags |= LOWWAIT;
+ bc->ilow = 1;
+ }
+ memoff(ch);
+ restore_flags(flags);
+ }
+
+ /* Return how much room is left on card */
+ return remain;
+
+} /* End pc_write_room */
+
+/* ------------------ Begin pc_chars_in_buffer ---------------------- */
+
+static int pc_chars_in_buffer(struct tty_struct *tty)
+{ /* Begin pc_chars_in_buffer */
+
+ int chars;
+ unsigned int ctail, head, tail;
+ int remain;
+ unsigned long flags;
+ struct channel *ch;
+ volatile struct board_chan *bc;
+
+
+ /* ---------------------------------------------------------
+ verifyChannel returns the channel from the tty struct
+ if it is valid. This serves as a sanity check.
+ ------------------------------------------------------------- */
+
+ if ((ch = verifyChannel(tty)) == NULL)
+ return(0);
+
+ save_flags(flags);
+ cli();
+ globalwinon(ch);
+
+ bc = ch->brdchan;
+ tail = bc->tout;
+ head = bc->tin;
+ ctail = ch->mailbox->cout;
+
+ if (tail == head && ch->mailbox->cin == ctail && bc->tbusy == 0)
+ chars = 0;
+ else
+ { /* Begin if some space on the card has been used */
+
+ head = bc->tin & (ch->txbufsize - 1);
+ tail &= (ch->txbufsize - 1);
+
+ /* --------------------------------------------------------------
+ The logic here is basically opposite of the above pc_write_room
+ here we are finding the amount of bytes in the buffer filled.
+ Not the amount of bytes empty.
+ ------------------------------------------------------------------- */
+
+ if ((remain = tail - head - 1) < 0 )
+ remain += ch->txbufsize;
+
+ chars = (int)(ch->txbufsize - remain);
+
+ /* -------------------------------------------------------------
+ Make it possible to wakeup anything waiting for output
+ in tty_ioctl.c, etc.
+
+ If not already set. Setup an event to indicate when the
+ transmit buffer empties
+ ----------------------------------------------------------------- */
+
+ if (!(ch->statusflags & EMPTYWAIT))
+ setup_empty_event(tty,ch);
+
+ } /* End if some space on the card has been used */
+
+ memoff(ch);
+ restore_flags(flags);
+
+ /* Return number of characters residing on card. */
+ return(chars);
+
+} /* End pc_chars_in_buffer */
+
+/* ------------------ Begin pc_flush_buffer ---------------------- */
+
+static void pc_flush_buffer(struct tty_struct *tty)
+{ /* Begin pc_flush_buffer */
+
+ unsigned int tail;
+ unsigned long flags;
+ struct channel *ch;
+ volatile struct board_chan *bc;
+
+
+ /* ---------------------------------------------------------
+ verifyChannel returns the channel from the tty struct
+ if it is valid. This serves as a sanity check.
+ ------------------------------------------------------------- */
+
+ if ((ch = verifyChannel(tty)) == NULL)
+ return;
+
+ save_flags(flags);
+ cli();
+
+ globalwinon(ch);
+
+ bc = ch->brdchan;
+ tail = bc->tout;
+
+ /* Have FEP move tout pointer; effectively flushing transmit buffer */
+
+ fepcmd(ch, STOUT, (unsigned) tail, 0, 0, 0);
+
+ memoff(ch);
+ restore_flags(flags);
+
+ wake_up_interruptible(&tty->write_wait);
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
+ (tty->ldisc.write_wakeup)(tty);
+
+} /* End pc_flush_buffer */
+
+/* ------------------ Begin pc_flush_chars ---------------------- */
+
+static void pc_flush_chars(struct tty_struct *tty)
+{ /* Begin pc_flush_chars */
+
+ struct channel * ch;
+
+ /* ---------------------------------------------------------
+ verifyChannel returns the channel from the tty struct
+ if it is valid. This serves as a sanity check.
+ ------------------------------------------------------------- */
+
+ if ((ch = verifyChannel(tty)) != NULL)
+ {
+ unsigned long flags;
+
+ save_flags(flags);
+ cli();
+
+ /* ----------------------------------------------------------------
+ If not already set and the transmitter is busy setup an event
+ to indicate when the transmit empties.
+ ------------------------------------------------------------------- */
+
+ if ((ch->statusflags & TXBUSY) && !(ch->statusflags & EMPTYWAIT))
+ setup_empty_event(tty,ch);
+
+ restore_flags(flags);
+ }
+
+} /* End pc_flush_chars */
+
+/* ------------------ Begin block_til_ready ---------------------- */
+
+static int block_til_ready(struct tty_struct *tty,
+ struct file *filp, struct channel *ch)
+{ /* Begin block_til_ready */
+
+ struct wait_queue wait = {current, NULL};
+ int retval, do_clocal = 0;
+ unsigned long flags;
+
+
+ if (tty_hung_up_p(filp))
+ {
+ if (ch->asyncflags & ASYNC_HUP_NOTIFY)
+ retval = -EAGAIN;
+ else
+ retval = -ERESTARTSYS;
+ return(retval);
+ }
+
+ /* -----------------------------------------------------------------
+ If the device is in the middle of being closed, then block
+ until it's done, and then try again.
+ -------------------------------------------------------------------- */
+ if (ch->asyncflags & ASYNC_CLOSING)
+ {
+ interruptible_sleep_on(&ch->close_wait);
+
+ if (ch->asyncflags & ASYNC_HUP_NOTIFY)
+ return -EAGAIN;
+ else
+ return -ERESTARTSYS;
+ }
+
+ /* -----------------------------------------------------------------
+ If this is a callout device, then just make sure the normal
+ device isn't being used.
+ -------------------------------------------------------------------- */
+
+ if (tty->driver.subtype == SERIAL_TYPE_CALLOUT)
+ { /* A cud device has been opened */
+ if (ch->asyncflags & ASYNC_NORMAL_ACTIVE)
+ return -EBUSY;
+
+ if ((ch->asyncflags & ASYNC_CALLOUT_ACTIVE) &&
+ (ch->asyncflags & ASYNC_SESSION_LOCKOUT) &&
+ (ch->session != current->session))
+ return -EBUSY;
+
+ if ((ch->asyncflags & ASYNC_CALLOUT_ACTIVE) &&
+ (ch->asyncflags & ASYNC_PGRP_LOCKOUT) &&
+ (ch->pgrp != current->pgrp))
+ return -EBUSY;
+
+ ch->asyncflags |= ASYNC_CALLOUT_ACTIVE;
+
+ return 0;
+ } /* End a cud device has been opened */
+
+ if (filp->f_flags & O_NONBLOCK)
+ {
+ /* -----------------------------------------------------------------
+ If non-blocking mode is set, then make the check up front
+ and then exit.
+ -------------------------------------------------------------------- */
+
+ if (ch->asyncflags & ASYNC_CALLOUT_ACTIVE)
+ return -EBUSY;
+
+ ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
+
+ return 0;
+ }
+
+
+ if (ch->asyncflags & ASYNC_CALLOUT_ACTIVE)
+ {
+ if (ch->normal_termios.c_cflag & CLOCAL)
+ do_clocal = 1;
+ }
+ else
+ {
+ if (tty->termios->c_cflag & CLOCAL)
+ do_clocal = 1;
+ }
+
+ /* Block waiting for the carrier detect and the line to become free */
+
+ retval = 0;
+ add_wait_queue(&ch->open_wait, &wait);
+ save_flags(flags);
+ cli();
+
+
+ /* We dec count so that pc_close will know when to free things */
+ if (!tty_hung_up_p(filp))
+ ch->count--;
+
+ restore_flags(flags);
+
+ ch->blocked_open++;
+
+ while(1)
+ { /* Begin forever while */
+
+ current->state = TASK_INTERRUPTIBLE;
+
+ if (tty_hung_up_p(filp) ||
+ !(ch->asyncflags & ASYNC_INITIALIZED))
+ {
+ if (ch->asyncflags & ASYNC_HUP_NOTIFY)
+ retval = -EAGAIN;
+ else
+ retval = -ERESTARTSYS;
+ break;
+ }
+
+ if (!(ch->asyncflags & ASYNC_CLOSING) &&
+ !(ch->asyncflags & ASYNC_CALLOUT_ACTIVE) &&
+ (do_clocal || (ch->imodem & ch->dcd)))
+ break;
+
+ if (current->signal & ~current->blocked)
+ {
+ retval = -ERESTARTSYS;
+ break;
+ }
+
+ /* ---------------------------------------------------------------
+ Allow someone else to be scheduled. We will occasionaly go
+ through this loop until one of the above conditions change.
+ The below schedule call will allow other processes to enter and
+ prevent this loop from hogging the cpu.
+ ------------------------------------------------------------------ */
+ schedule();
+
+ } /* End forever while */
+
+ current->state = TASK_RUNNING;
+ remove_wait_queue(&ch->open_wait, &wait);
+ cli();
+ if (!tty_hung_up_p(filp))
+ ch->count++;
+ restore_flags(flags);
+
+ ch->blocked_open--;
+
+ if (retval)
+ return retval;
+
+ ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
+
+ return 0;
+
+} /* End block_til_ready */
+
+/* ------------------ Begin pc_open ---------------------- */
+
+static int pc_open(struct tty_struct *tty, struct file * filp)
+{ /* Begin pc_open */
+
+ struct channel *ch;
+ unsigned long flags;
+ int line, retval, boardnum;
+ volatile struct board_chan *bc;
+ volatile unsigned int head;
+
+ /* Nothing "real" happens in open of control device */
+
+ if (tty->driver.subtype == SERIAL_TYPE_INFO)
+ {
+ return (0) ;
+ }
+
+ line = MINOR(tty->device) - tty->driver.minor_start;
+ if (line < 0 || line >= nbdevs)
+ {
+ printk(KERN_ERR "<Error> - pc_open : line out of range in pc_open\n");
+ tty->driver_data = NULL;
+ return(-ENODEV);
+ }
+
+#ifdef MODULE
+
+ MOD_INC_USE_COUNT;
+
+#endif
+
+ ch = &digi_channels[line];
+ boardnum = ch->boardnum;
+
+ /* Check status of board configured in system. */
+
+ /* -----------------------------------------------------------------
+ I check to see if the epca_setup routine detected an user error.
+ It might be better to put this in pc_init, but for the moment it
+ goes here.
+ ---------------------------------------------------------------------- */
+
+ if (invalid_lilo_config)
+ {
+ if (setup_error_code & INVALID_BOARD_TYPE)
+ printk(KERN_ERR "<Error> - pc_open: Invalid board type specified in LILO command\n");
+
+ if (setup_error_code & INVALID_NUM_PORTS)
+ printk(KERN_ERR "<Error> - pc_open: Invalid number of ports specified in LILO command\n");
+
+ if (setup_error_code & INVALID_MEM_BASE)
+ printk(KERN_ERR "<Error> - pc_open: Invalid board memory address specified in LILO command\n");
+
+ if (setup_error_code & INVALID_PORT_BASE)
+ printk(KERN_ERR "<Error> - pc_open: Invalid board port address specified in LILO command\n");
+
+ if (setup_error_code & INVALID_BOARD_STATUS)
+ printk(KERN_ERR "<Error> - pc_open: Invalid board status specified in LILO command\n");
+
+ if (setup_error_code & INVALID_ALTPIN)
+ printk(KERN_ERR "<Error> - pc_open: Invalid board altpin specified in LILO command\n");
+
+ tty->driver_data = NULL; /* Mark this device as 'down' */
+ return(-ENODEV);
+ }
+
+ if ((boardnum >= num_cards) || (boards[boardnum].status == DISABLED))
+ {
+ tty->driver_data = NULL; /* Mark this device as 'down' */
+ return(-ENODEV);
+ }
+
+ if (( bc = ch->brdchan) == 0)
+ {
+ tty->driver_data = NULL;
+ return(-ENODEV);
+ }
+
+ /* ------------------------------------------------------------------
+ Every time a channel is opened, increment a counter. This is
+ necessary because we do not wish to flush and shutdown the channel
+ until the last app holding the channel open, closes it.
+ --------------------------------------------------------------------- */
+
+ ch->count++;
+
+ /* ----------------------------------------------------------------
+ Set a kernel structures pointer to our local channel
+ structure. This way we can get to it when passed only
+ a tty struct.
+ ------------------------------------------------------------------ */
+
+ tty->driver_data = ch;
+
+ /* ----------------------------------------------------------------
+ If this is the first time the channel has been opened, initialize
+ the tty->termios struct otherwise let pc_close handle it.
+ -------------------------------------------------------------------- */
+
+ /* Should this be here except for SPLIT termios ? */
+ if (ch->count == 1)
+ {
+ if (tty->driver.subtype == SERIAL_TYPE_NORMAL)
+ *tty->termios = ch->normal_termios;
+ else
+ *tty->termios = ch->callout_termios;
+ }
+
+ ch->session = current->session;
+ ch->pgrp = current->pgrp;
+
+ save_flags(flags);
+ cli();
+
+ globalwinon(ch);
+ ch->statusflags = 0;
+
+ /* Save boards current modem status */
+ ch->imodem = bc->mstat;
+
+ /* ----------------------------------------------------------------
+ Set receive head and tail ptrs to each other. This indicates
+ no data available to read.
+ ----------------------------------------------------------------- */
+ head = bc->rin;
+ bc->rout = head;
+
+ /* Set the channels associated tty structure */
+ ch->tty = tty;
+
+ /* -----------------------------------------------------------------
+ The below routine generally sets up parity, baud, flow control
+ issues, etc.... It effect both control flags and input flags.
+ -------------------------------------------------------------------- */
+ epcaparam(tty,ch);
+
+ ch->asyncflags |= ASYNC_INITIALIZED;
+ memoff(ch);
+
+ restore_flags(flags);
+
+ retval = block_til_ready(tty, filp, ch);
+ if (retval)
+ {
+ return retval;
+ }
+
+ /* -------------------------------------------------------------
+ Set this again in case a hangup set it to zero while this
+ open() was waiting for the line...
+ --------------------------------------------------------------- */
+ ch->tty = tty;
+
+ save_flags(flags);
+ cli();
+ globalwinon(ch);
+
+ /* Enable Digi Data events */
+ bc->idata = 1;
+
+ memoff(ch);
+ restore_flags(flags);
+
+ return 0;
+
+} /* End pc_open */
+
+#ifdef MODULE
+/* -------------------- Begin init_module ---------------------- */
+int init_module()
+{ /* Begin init_module */
+
+ unsigned long flags;
+
+ save_flags(flags);
+ cli();
+
+ pc_init();
+
+ restore_flags(flags);
+
+ return(0);
+} /* End init_module */
+
+#endif
+#ifdef MODULE
+/* -------------------- Begin cleanup_module ---------------------- */
+void cleanup_module()
+{ /* Begin cleanup_module */
+
+ int count, crd;
+ struct board_info *bd;
+ struct channel *ch;
+ unsigned long flags;
+
+
+ save_flags(flags);
+ cli();
+
+ timer_table[DIGI_TIMER].fn = 0;
+
+ if ((tty_unregister_driver(&pc_driver)) ||
+ (tty_unregister_driver(&pc_callout)))
+ {
+ printk(KERN_WARNING "<Error> - DIGI : cleanup_module failed to un-register tty driver\n");
+ restore_flags(flags);
+ return;
+ }
+
+ for (crd = 0; crd < num_cards; crd++)
+ { /* Begin for each card */
+
+ bd = &boards[crd];
+
+ if (!bd)
+ { /* Begin sanity check */
+ printk(KERN_ERR "<Error> - Digi : cleanup_module failed\n");
+ return;
+ } /* End sanity check */
+
+ ch = card_ptr[crd];
+
+ for (count = 0; count < bd->numports; count++, ch++)
+ { /* Begin for each port */
+
+ if (ch)
+ {
+ if (ch->tty)
+ tty_hangup(ch->tty);
+ kfree_s(ch->tmp_buf, ch->txbufsize);
+ }
+
+ } /* End for each port */
+ } /* End for each card */
+
+
+ restore_flags(flags);
+
+} /* End cleanup_module */
+#endif /* MODULE */
+
+/* ------------------ Begin pc_init ---------------------- */
+
+int pc_init(void)
+{ /* Begin pc_init */
+
+ /* ----------------------------------------------------------------
+ pc_init is called by the operating system during boot up prior to
+ any open calls being made. In the older versions of Linux (Prior
+ to 2.0.0) an entry is made into tty_io.c. A pointer to the last
+ memory location (from kernel space) used (kmem_start) is passed
+ to pc_init. It is pc_inits responsibility to modify this value
+ for any memory that the Digi driver might need and then return
+ this value to the operating system. For example if the driver
+ wishes to allocate 1K of kernel memory, pc_init would return
+ (kmem_start + 1024). This memory (Between kmem_start and kmem_start
+ + 1024) would then be available for use exclusively by the driver.
+ In this case our driver does not allocate any of this kernel
+ memory.
+ ------------------------------------------------------------------*/
+
+ ulong flags, save_loops_per_sec;
+ int crd;
+ struct board_info *bd;
+ unsigned char board_id = 0;
+
+
+#ifdef ENABLE_PCI
+ int pci_boards_found, pci_count;
+
+ pci_count = 0;
+#endif /* ENABLE_PCI */
+
+ /* -----------------------------------------------------------------------
+ If epca_setup has not been ran by LILO set num_cards to defaults; copy
+ board structure defined by digiConfig into drivers board structure.
+ Note : If LILO has ran epca_setup then epca_setup will handle defining
+ num_cards as well as copying the data into the board structure.
+ -------------------------------------------------------------------------- */
+ if (!liloconfig)
+ { /* Begin driver has been configured via. epcaconfig */
+
+ nbdevs = NBDEVS;
+ num_cards = NUMCARDS;
+ memcpy((void *)&boards, (void *)&static_boards,
+ (sizeof(struct board_info) * NUMCARDS));
+ } /* End driver has been configured via. epcaconfig */
+
+ /* -----------------------------------------------------------------
+ Note : If lilo was used to configure the driver and the
+ ignore epcaconfig option was choosen (digiepca=2) then
+ nbdevs and num_cards will equal 0 at this point. This is
+ okay; PCI cards will still be picked up if detected.
+ --------------------------------------------------------------------- */
+
+ /* -----------------------------------------------------------
+ Set up interrupt, we will worry about memory allocation in
+ post_fep_init.
+ --------------------------------------------------------------- */
+
+
+ printk(KERN_INFO "DIGI epca driver version %s loaded.\n",VERSION);
+
+#ifdef ENABLE_PCI
+
+ /* ------------------------------------------------------------------
+ NOTE : This code assumes that the number of ports found in
+ the boards array is correct. This could be wrong if
+ the card in question is PCI (And therefore has no ports
+ entry in the boards structure.) The rest of the
+ information will be valid for PCI because the begining
+ of pc_init scans for PCI and determines i/o and base
+ memory addresses. I am not sure if it is possible to
+ read the number of ports supported by the card prior to
+ it being booted (Since that is the state it is in when
+ pc_init is run). Because it is not possible to query the
+ number of supported ports until after the card has booted;
+ we are required to calculate the card_ptrs as the card is
+ is initialized (Inside post_fep_init). The negative thing
+ about this approach is that digiDload's call to GET_INFO
+ will have a bad port value. (Since this is called prior
+ to post_fep_init.)
+
+ --------------------------------------------------------------------- */
+
+ pci_boards_found = 0;
+ if (pcibios_present())
+ {
+ if(num_cards < MAXBOARDS)
+ pci_boards_found += init_PCI(num_cards);
+ num_cards += pci_boards_found;
+ }
+ else
+ {
+ printk(KERN_ERR "<Error> - No PCI BIOS found\n");
+ }
+
+#endif /* ENABLE_PCI */
+
+ memset(&pc_driver, 0, sizeof(struct tty_driver));
+ memset(&pc_callout, 0, sizeof(struct tty_driver));
+ memset(&pc_info, 0, sizeof(struct tty_driver));
+
+ pc_driver.magic = TTY_DRIVER_MAGIC;
+ pc_driver.name = "ttyD";
+ pc_driver.major = DIGI_MAJOR;
+ pc_driver.minor_start = 0;
+ pc_driver.num = MAX_ALLOC;
+ pc_driver.type = TTY_DRIVER_TYPE_SERIAL;
+ pc_driver.subtype = SERIAL_TYPE_NORMAL;
+ pc_driver.init_termios = tty_std_termios;
+ pc_driver.init_termios.c_iflag = 0;
+ pc_driver.init_termios.c_oflag = 0;
+
+ pc_driver.init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
+ pc_driver.init_termios.c_lflag = 0;
+ pc_driver.flags = TTY_DRIVER_REAL_RAW;
+ pc_driver.refcount = &pc_refcount;
+ pc_driver.table = pc_table;
+
+ /* pc_termios is an array of pointers pointing at termios structs */
+ /* The below should get the first pointer */
+ pc_driver.termios = pc_termios;
+ pc_driver.termios_locked = pc_termios_locked;
+
+ /* ------------------------------------------------------------------
+ Setup entry points for the driver. These are primarily called by
+ the kernel in tty_io.c and n_tty.c
+ --------------------------------------------------------------------- */
+
+ pc_driver.open = pc_open;
+ pc_driver.close = pc_close;
+ pc_driver.write = pc_write;
+ pc_driver.write_room = pc_write_room;
+ pc_driver.flush_buffer = pc_flush_buffer;
+ pc_driver.chars_in_buffer = pc_chars_in_buffer;
+ pc_driver.flush_chars = pc_flush_chars;
+ pc_driver.put_char = pc_put_char;
+ pc_driver.ioctl = pc_ioctl;
+ pc_driver.set_termios = pc_set_termios;
+ pc_driver.stop = pc_stop;
+ pc_driver.start = pc_start;
+ pc_driver.throttle = pc_throttle;
+ pc_driver.unthrottle = pc_unthrottle;
+ pc_driver.hangup = pc_hangup;
+ pc_callout = pc_driver;
+
+ pc_callout.name = "cud";
+ pc_callout.major = DIGICU_MAJOR;
+ pc_callout.minor_start = 0;
+ pc_callout.init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
+ pc_callout.subtype = SERIAL_TYPE_CALLOUT;
+
+ pc_info = pc_driver;
+ pc_info.name = "digiCtl";
+ pc_info.major = DIGIINFOMAJOR;
+ pc_info.minor_start = 0;
+ pc_info.init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL;
+ pc_info.subtype = SERIAL_TYPE_INFO;
+
+
+ /* ---------------------------------------------------------------------
+ loops_per_sec hasn't been set at this point :-(, so fake it out...
+ I set it, so that I can use the __delay() function.
+ ------------------------------------------------------------------------ */
+ save_loops_per_sec = loops_per_sec;
+ loops_per_sec = 13L * 500000L;
+
+ save_flags(flags);
+ cli();
+
+ for (crd = 0; crd < num_cards; crd++)
+ { /* Begin for each card */
+
+ /* ------------------------------------------------------------------
+ This is where the appropriate memory handlers for the hardware is
+ set. Everything at runtime blindly jumps through these vectors.
+ ---------------------------------------------------------------------- */
+
+ /* defined in epcaconfig.h */
+ bd = &boards[crd];
+
+ switch (bd->type)
+ { /* Begin switch on bd->type {board type} */
+ case PCXEM:
+ case EISAXEM:
+ bd->memwinon = pcxem_memwinon ;
+ bd->memwinoff = pcxem_memwinoff ;
+ bd->globalwinon = pcxem_globalwinon ;
+ bd->txwinon = pcxem_txwinon ;
+ bd->rxwinon = pcxem_rxwinon ;
+ bd->memoff = pcxem_memoff ;
+ bd->assertgwinon = dummy_assertgwinon;
+ bd->assertmemoff = dummy_assertmemoff;
+ break;
+
+ case PCIXEM:
+ case PCIXRJ:
+ case PCIXR:
+ bd->memwinon = dummy_memwinon;
+ bd->memwinoff = dummy_memwinoff;
+ bd->globalwinon = dummy_globalwinon;
+ bd->txwinon = dummy_txwinon;
+ bd->rxwinon = dummy_rxwinon;
+ bd->memoff = dummy_memoff;
+ bd->assertgwinon = dummy_assertgwinon;
+ bd->assertmemoff = dummy_assertmemoff;
+ break;
+
+ case PCXE:
+ case PCXEVE:
+
+ bd->memwinon = pcxe_memwinon;
+ bd->memwinoff = pcxe_memwinoff;
+ bd->globalwinon = pcxe_globalwinon;
+ bd->txwinon = pcxe_txwinon;
+ bd->rxwinon = pcxe_rxwinon;
+ bd->memoff = pcxe_memoff;
+ bd->assertgwinon = dummy_assertgwinon;
+ bd->assertmemoff = dummy_assertmemoff;
+ break;
+
+ case PCXI:
+ case PC64XE:
+
+ bd->memwinon = pcxi_memwinon;
+ bd->memwinoff = pcxi_memwinoff;
+ bd->globalwinon = pcxi_globalwinon;
+ bd->txwinon = pcxi_txwinon;
+ bd->rxwinon = pcxi_rxwinon;
+ bd->memoff = pcxi_memoff;
+ bd->assertgwinon = pcxi_assertgwinon;
+ bd->assertmemoff = pcxi_assertmemoff;
+ break;
+
+ default:
+ break;
+
+ } /* End switch on bd->type */
+
+ /* ---------------------------------------------------------------
+ Some cards need a memory segment to be defined for use in
+ transmit and receive windowing operations. These boards
+ are listed in the below switch. In the case of the XI the
+ amount of memory on the board is variable so the memory_seg
+ is also variable. This code determines what they segment
+ should be.
+ ----------------------------------------------------------------- */
+
+ switch (bd->type)
+ { /* Begin switch on bd->type {board type} */
+
+ case PCXE:
+ case PCXEVE:
+ case PC64XE:
+ bd->memory_seg = 0xf000;
+ break;
+
+ case PCXI:
+ board_id = inb((int)bd->port);
+ if ((board_id & 0x1) == 0x1)
+ { /* Begin its an XI card */
+
+ /* Is it a 64K board */
+ if ((board_id & 0x30) == 0)
+ bd->memory_seg = 0xf000;
+
+ /* Is it a 128K board */
+ if ((board_id & 0x30) == 0x10)
+ bd->memory_seg = 0xe000;
+
+ /* Is is a 256K board */
+ if ((board_id & 0x30) == 0x20)
+ bd->memory_seg = 0xc000;
+
+ /* Is it a 512K board */
+ if ((board_id & 0x30) == 0x30)
+ bd->memory_seg = 0x8000;
+
+ } /* End it is an XI card */
+ else
+ {
+ printk(KERN_ERR "<Error> - Board at 0x%x doesn't appear to be an XI\n",(int)bd->port);
+ }
+ break;
+
+ } /* End switch on bd->type */
+
+ } /* End for each card */
+
+ if (tty_register_driver(&pc_driver))
+ panic("Couldn't register Digi PC/ driver");
+
+ if (tty_register_driver(&pc_callout))
+ panic("Couldn't register Digi PC/ callout");
+
+ if (tty_register_driver(&pc_info))
+ panic("Couldn't register Digi PC/ info ");
+
+ loops_per_sec = save_loops_per_sec; /* reset it to what it should be */
+
+ /* -------------------------------------------------------------------
+ Start up the poller to check for events on all enabled boards
+ ---------------------------------------------------------------------- */
+
+ timer_table[DIGI_TIMER].fn = (void *)epcapoll;
+ timer_table[DIGI_TIMER].expires = 0;
+
+ restore_flags(flags);
+
+ timer_active |= 1 << DIGI_TIMER;
+ return 0;
+
+} /* End pc_init */
+
+/* ------------------ Begin post_fep_init ---------------------- */
+
+static void post_fep_init(unsigned int crd)
+{ /* Begin post_fep_init */
+
+ int i;
+ unchar *memaddr;
+ volatile struct global_data *gd;
+ struct board_info *bd;
+ volatile struct board_chan *bc;
+ struct channel *ch;
+ int shrinkmem = 0, lowwater ;
+
+ /* -------------------------------------------------------------
+ This call is made by the user via. the ioctl call DIGI_INIT.
+ It is resposible for setting up all the card specific stuff.
+ ---------------------------------------------------------------- */
+ bd = &boards[crd];
+
+ /* -----------------------------------------------------------------
+ If this is a PCI board, get the port info. Remember PCI cards
+ do not have entries into the epcaconfig.h file, so we can't get
+ the number of ports from it. Unfortunetly, this means that anyone
+ doing a DIGI_GETINFO before the board has booted will get an invalid
+ number of ports returned (It should return 0). Calls to DIGI_GETINFO
+ after DIGI_INIT has been called will return the proper values.
+ ------------------------------------------------------------------- */
+
+ if (bd->type >= PCIXEM) /* If the board in question is PCI */
+ { /* Begin get PCI number of ports */
+
+ /* --------------------------------------------------------------------
+ Below we use XEMPORTS as a memory offset regardless of which PCI
+ card it is. This is because all of the supported PCI cards have
+ the same memory offset for the channel data. This will have to be
+ changed if we ever develop a PCI/XE card. NOTE : The FEP manual
+ states that the port offset is 0xC22 as opposed to 0xC02. This is
+ only true for PC/XE, and PC/XI cards; not for the XEM, or CX series.
+ On the PCI cards the number of ports is determined by reading a
+ ID PROM located in the box attached to the card. The card can then
+ determine the index the id to determine the number of ports available.
+ (FYI - The id should be located at 0x1ac (And may use up to 4 bytes
+ if the box in question is a XEM or CX)).
+ ------------------------------------------------------------------------ */
+
+ bd->numports = (unsigned short)*(unsigned char *)bus_to_virt((unsigned long)
+ (bd->re_map_membase + XEMPORTS));
+
+
+ epcaassert(bd->numports <= 64,"PCI returned a invalid number of ports");
+ nbdevs += (bd->numports);
+
+ } /* End get PCI number of ports */
+
+ if (crd != 0)
+ card_ptr[crd] = card_ptr[crd-1] + boards[crd-1].numports;
+ else
+ card_ptr[crd] = &digi_channels[crd]; /* <- For card 0 only */
+
+ ch = card_ptr[crd];
+
+
+ epcaassert(ch <= &digi_channels[nbdevs - 1], "ch out of range");
+
+ if (bd->membase < (unsigned char *)0x100000)
+ memaddr = (unchar *) bd->membase;
+ else /* Else get special mapped memory above RAM */
+ memaddr = (unchar *)bd->re_map_membase;
+
+ /*
+ The below command is necessary because newer kernels (2.1.x and
+ up) do not have a 1:1 virtual to physical mapping. The below
+ call adjust for that.
+ */
+
+ memaddr = (unsigned char *)bus_to_virt((unsigned long)memaddr);
+
+ /* -----------------------------------------------------------------
+ The below assignment will set bc to point at the BEGINING of
+ the cards channel structures. For 1 card there will be between
+ 8 and 64 of these structures.
+ -------------------------------------------------------------------- */
+
+ bc = (volatile struct board_chan *)((ulong)memaddr + CHANSTRUCT);
+
+ /* -------------------------------------------------------------------
+ The below assignment will set gd to point at the BEGINING of
+ global memory address 0xc00. The first data in that global
+ memory actually starts at address 0xc1a. The command in
+ pointer begins at 0xd10.
+ ---------------------------------------------------------------------- */
+
+ gd = (volatile struct global_data *)((ulong)memaddr + GLOBAL);
+
+ /* --------------------------------------------------------------------
+ XEPORTS (address 0xc22) points at the number of channels the
+ card supports. (For 64XE, XI, XEM, and XR use 0xc02)
+ ----------------------------------------------------------------------- */
+
+ if (((bd->type == PCXEVE) | (bd->type == PCXE)) &&
+ (*(ushort *)((ulong)memaddr + XEPORTS) < 3))
+ shrinkmem = 1;
+ if (bd->type < PCIXEM)
+ request_region((int)bd->port, 4, board_desc[bd->type]);
+
+ memwinon(bd, 0);
+
+ /* --------------------------------------------------------------------
+ Remember ch is the main drivers channels structure, while bc is
+ the cards channel structure.
+ ------------------------------------------------------------------------ */
+
+ /* For every port on the card do ..... */
+
+ for (i = 0; i < bd->numports; i++, ch++, bc++)
+ { /* Begin for each port */
+
+ ch->brdchan = bc;
+ ch->mailbox = gd;
+ ch->tqueue.routine = do_softint;
+ ch->tqueue.data = ch;
+ ch->board = &boards[crd];
+
+ switch (bd->type)
+ { /* Begin switch bd->type */
+
+ /* ----------------------------------------------------------------
+ Since some of the boards use different bitmaps for their
+ control signals we cannot hard code these values and retain
+ portability. We virtualize this data here.
+ ------------------------------------------------------------------- */
+ case EISAXEM:
+ case PCXEM:
+ case PCIXEM:
+ case PCIXRJ:
+ case PCIXR:
+ ch->m_rts = 0x02 ;
+ ch->m_dcd = 0x80 ;
+ ch->m_dsr = 0x20 ;
+ ch->m_cts = 0x10 ;
+ ch->m_ri = 0x40 ;
+ ch->m_dtr = 0x01 ;
+ break;
+
+ case PCXE:
+ case PCXEVE:
+ case PCXI:
+ case PC64XE:
+ ch->m_rts = 0x02 ;
+ ch->m_dcd = 0x08 ;
+ ch->m_dsr = 0x10 ;
+ ch->m_cts = 0x20 ;
+ ch->m_ri = 0x40 ;
+ ch->m_dtr = 0x80 ;
+ break;
+
+ } /* End switch bd->type */
+
+ if (boards[crd].altpin)
+ {
+ ch->dsr = ch->m_dcd;
+ ch->dcd = ch->m_dsr;
+ ch->digiext.digi_flags |= DIGI_ALTPIN;
+ }
+ else
+ {
+ ch->dcd = ch->m_dcd;
+ ch->dsr = ch->m_dsr;
+ }
+
+ ch->boardnum = crd;
+ ch->channelnum = i;
+ ch->magic = EPCA_MAGIC;
+ ch->tty = 0;
+
+ if (shrinkmem)
+ {
+ fepcmd(ch, SETBUFFER, 32, 0, 0, 0);
+ shrinkmem = 0;
+ }
+
+ switch (bd->type)
+ { /* Begin switch bd->type */
+
+ case PCIXEM:
+ case PCIXRJ:
+ case PCIXR:
+ /* Cover all the 2MEG cards */
+ ch->txptr = memaddr + (((bc->tseg) << 4) & 0x1fffff);
+ ch->rxptr = memaddr + (((bc->rseg) << 4) & 0x1fffff);
+ ch->txwin = FEPWIN | ((bc->tseg) >> 11);
+ ch->rxwin = FEPWIN | ((bc->rseg) >> 11);
+ break;
+
+ case PCXEM:
+ case EISAXEM:
+ /* Cover all the 32K windowed cards */
+ /* Mask equal to window size - 1 */
+ ch->txptr = memaddr + (((bc->tseg) << 4) & 0x7fff);
+ ch->rxptr = memaddr + (((bc->rseg) << 4) & 0x7fff);
+ ch->txwin = FEPWIN | ((bc->tseg) >> 11);
+ ch->rxwin = FEPWIN | ((bc->rseg) >> 11);
+ break;
+
+ case PCXEVE:
+ case PCXE:
+ ch->txptr = memaddr + (((bc->tseg - bd->memory_seg) << 4) & 0x1fff);
+ ch->txwin = FEPWIN | ((bc->tseg - bd->memory_seg) >> 9);
+ ch->rxptr = memaddr + (((bc->rseg - bd->memory_seg) << 4) & 0x1fff);
+ ch->rxwin = FEPWIN | ((bc->rseg - bd->memory_seg) >>9 );
+ break;
+
+ case PCXI:
+ case PC64XE:
+ ch->txptr = memaddr + ((bc->tseg - bd->memory_seg) << 4);
+ ch->rxptr = memaddr + ((bc->rseg - bd->memory_seg) << 4);
+ ch->txwin = ch->rxwin = 0;
+ break;
+
+ } /* End switch bd->type */
+
+ ch->txbufhead = 0;
+ ch->txbufsize = bc->tmax + 1;
+
+ ch->rxbufhead = 0;
+ ch->rxbufsize = bc->rmax + 1;
+
+ lowwater = ch->txbufsize >= 2000 ? 1024 : (ch->txbufsize / 2);
+
+ /* Set transmitter low water mark */
+ fepcmd(ch, STXLWATER, lowwater, 0, 10, 0);
+
+ /* Set receiver low water mark */
+
+ fepcmd(ch, SRXLWATER, (ch->rxbufsize / 4), 0, 10, 0);
+
+ /* Set receiver high water mark */
+
+ fepcmd(ch, SRXHWATER, (3 * ch->rxbufsize / 4), 0, 10, 0);
+
+ bc->edelay = 100;
+ bc->idata = 1;
+
+ ch->startc = bc->startc;
+ ch->stopc = bc->stopc;
+ ch->startca = bc->startca;
+ ch->stopca = bc->stopca;
+
+ ch->fepcflag = 0;
+ ch->fepiflag = 0;
+ ch->fepoflag = 0;
+ ch->fepstartc = 0;
+ ch->fepstopc = 0;
+ ch->fepstartca = 0;
+ ch->fepstopca = 0;
+
+ ch->close_delay = 50;
+ ch->count = 0;
+ ch->blocked_open = 0;
+ ch->callout_termios = pc_callout.init_termios;
+ ch->normal_termios = pc_driver.init_termios;
+ ch->open_wait = 0;
+ ch->close_wait = 0;
+ ch->tmp_buf = kmalloc(ch->txbufsize,GFP_KERNEL);
+ if (!(ch->tmp_buf))
+ {
+ printk(KERN_ERR "POST FEP INIT : kmalloc failed for port 0x%x\n",i);
+
+ }
+ memset((void *)ch->tmp_buf,0,ch->txbufsize);
+ } /* End for each port */
+
+ printk(KERN_INFO
+ "Digi PC/Xx Driver V%s: %s I/O = 0x%lx Mem = 0x%lx Ports = %d\n",
+ VERSION, board_desc[bd->type], (long)bd->port, (long)bd->membase, bd->numports);
+ sprintf(mesg,
+ "Digi PC/Xx Driver V%s: %s I/O = 0x%lx Mem = 0x%lx Ports = %d\n",
+ VERSION, board_desc[bd->type], (long)bd->port, (long)bd->membase, bd->numports);
+ console_print(mesg);
+
+ memwinoff(bd, 0);
+
+} /* End post_fep_init */
+
+/* --------------------- Begin epcapoll ------------------------ */
+
+static void epcapoll(unsigned long ignored)
+{ /* Begin epcapoll */
+
+ unsigned long flags;
+ int crd;
+ volatile unsigned int head, tail;
+ struct channel *ch;
+ struct board_info *bd;
+
+ /* -------------------------------------------------------------------
+ This routine is called upon every timer interrupt. Even though
+ the Digi series cards are capable of generating interupts this
+ method of non-looping polling is more efficient. This routine
+ checks for card generated events (Such as receive data, are transmit
+ buffer empty) and acts on those events.
+ ----------------------------------------------------------------------- */
+
+ save_flags(flags);
+ cli();
+
+ for (crd = 0; crd < num_cards; crd++)
+ { /* Begin for each card */
+
+ bd = &boards[crd];
+ ch = card_ptr[crd];
+
+ if ((bd->status == DISABLED) || digi_poller_inhibited)
+ continue; /* Begin loop next interation */
+
+ /* -----------------------------------------------------------
+ assertmemoff is not needed here; indeed it is an empty subroutine.
+ It is being kept because future boards may need this as well as
+ some legacy boards.
+ ---------------------------------------------------------------- */
+
+ assertmemoff(ch);
+
+ globalwinon(ch);
+
+ /* ---------------------------------------------------------------
+ In this case head and tail actually refer to the event queue not
+ the transmit or receive queue.
+ ------------------------------------------------------------------- */
+
+ head = ch->mailbox->ein;
+ tail = ch->mailbox->eout;
+
+ /* If head isn't equal to tail we have an event */
+
+ if (head != tail)
+ doevent(crd);
+
+ memoff(ch);
+
+ } /* End for each card */
+
+ timer_table[DIGI_TIMER].fn = (void *)epcapoll;
+ timer_table[DIGI_TIMER].expires = jiffies + (HZ / 25);
+ timer_active |= 1 << DIGI_TIMER;
+
+ restore_flags(flags);
+
+} /* End epcapoll */
+
+/* --------------------- Begin doevent ------------------------ */
+
+static void doevent(int crd)
+{ /* Begin doevent */
+
+ volatile unchar *eventbuf;
+ struct channel *ch, *chan0;
+ static struct tty_struct *tty;
+ volatile struct board_info *bd;
+ volatile struct board_chan *bc;
+ register volatile unsigned int tail, head;
+ register int event, channel;
+ register int mstat, lstat;
+
+ /* -------------------------------------------------------------------
+ This subroutine is called by epcapoll when an event is detected
+ in the event queue. This routine responds to those events.
+ --------------------------------------------------------------------- */
+
+ bd = &boards[crd];
+
+ chan0 = card_ptr[crd];
+ epcaassert(chan0 <= &digi_channels[nbdevs - 1], "ch out of range");
+
+ assertgwinon(chan0);
+
+ while ((tail = chan0->mailbox->eout) != (head = chan0->mailbox->ein))
+ { /* Begin while something in event queue */
+
+ assertgwinon(chan0);
+
+ if (bd->membase < (unsigned char *)0x100000)
+ eventbuf = (volatile unchar *)bus_to_virt((ulong)(bd->membase + tail + ISTART));
+ else
+ {
+ eventbuf = (volatile unchar *)bus_to_virt((ulong)(bd->re_map_membase + tail + ISTART));
+ }
+
+ /* Get the channel the event occured on */
+ channel = eventbuf[0];
+
+ /* Get the actual event code that occured */
+ event = eventbuf[1];
+
+ /* ----------------------------------------------------------------
+ The two assignments below get the current modem status (mstat)
+ and the previous modem status (lstat). These are useful becuase
+ an event could signal a change in modem signals itself.
+ ------------------------------------------------------------------- */
+
+ mstat = eventbuf[2];
+ lstat = eventbuf[3];
+
+ ch = chan0 + channel;
+
+ if ((unsigned)channel >= bd->numports || !ch)
+ {
+ if (channel >= bd->numports)
+ ch = chan0;
+ bc = ch->brdchan;
+ goto next;
+ }
+
+ if ((bc = ch->brdchan) == NULL)
+ goto next;
+
+ if (event & DATA_IND)
+ { /* Begin DATA_IND */
+
+ receive_data(ch);
+ assertgwinon(ch);
+
+ } /* End DATA_IND */
+ else
+ if (event & MODEMCHG_IND)
+ { /* Begin MODEMCHG_IND */
+
+ /* A modem signal change has been indicated */
+
+ ch->imodem = mstat;
+
+ if (ch->asyncflags & ASYNC_CHECK_CD)
+ {
+ if (mstat & ch->dcd) /* We are now receiving dcd */
+ wake_up_interruptible(&ch->open_wait);
+ else
+ pc_sched_event(ch, EPCA_EVENT_HANGUP); /* No dcd; hangup */
+ }
+
+ } /* End MODEMCHG_IND */
+
+ tty = ch->tty;
+ if (tty)
+ { /* Begin if valid tty */
+
+ if (event & BREAK_IND)
+ { /* Begin if BREAK_IND */
+
+ /* A break has been indicated */
+
+ tty->flip.count++;
+ *tty->flip.flag_buf_ptr++ = TTY_BREAK;
+
+ *tty->flip.char_buf_ptr++ = 0;
+
+ tty_schedule_flip(tty);
+
+ } /* End if BREAK_IND */
+ else
+ if (event & LOWTX_IND)
+ { /* Begin LOWTX_IND */
+
+ if (ch->statusflags & LOWWAIT)
+ { /* Begin if LOWWAIT */
+
+ ch->statusflags &= ~LOWWAIT;
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
+ tty->ldisc.write_wakeup)
+ (tty->ldisc.write_wakeup)(tty);
+ wake_up_interruptible(&tty->write_wait);
+
+ } /* End if LOWWAIT */
+
+ } /* End LOWTX_IND */
+ else
+ if (event & EMPTYTX_IND)
+ { /* Begin EMPTYTX_IND */
+
+ /* This event is generated by setup_empty_event */
+
+ ch->statusflags &= ~TXBUSY;
+ if (ch->statusflags & EMPTYWAIT)
+ { /* Begin if EMPTYWAIT */
+
+ ch->statusflags &= ~EMPTYWAIT;
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
+ tty->ldisc.write_wakeup)
+ (tty->ldisc.write_wakeup)(tty);
+
+ wake_up_interruptible(&tty->write_wait);
+
+ } /* End if EMPTYWAIT */
+
+ } /* End EMPTYTX_IND */
+
+ } /* End if valid tty */
+
+
+ next:
+ globalwinon(ch);
+
+ if (!bc)
+ printk(KERN_ERR "<Error> - bc == NULL in doevent!\n");
+ else
+ bc->idata = 1;
+
+ chan0->mailbox->eout = (tail + 4) & (IMAX - ISTART - 4);
+ globalwinon(chan0);
+
+ } /* End while something in event queue */
+
+} /* End doevent */
+
+/* --------------------- Begin fepcmd ------------------------ */
+
+static void fepcmd(struct channel *ch, int cmd, int word_or_byte,
+ int byte2, int ncmds, int bytecmd)
+{ /* Begin fepcmd */
+
+ unchar *memaddr;
+ unsigned int head, cmdTail, cmdStart, cmdMax;
+ long count;
+ int n;
+
+ /* This is the routine in which commands may be passed to the card. */
+
+ if (ch->board->status == DISABLED)
+ {
+ return;
+ }
+
+ assertgwinon(ch);
+
+ /* Remember head (As well as max) is just an offset not a base addr */
+ head = ch->mailbox->cin;
+
+ /* cmdStart is a base address */
+ cmdStart = ch->mailbox->cstart;
+
+ /* ------------------------------------------------------------------
+ We do the addition below because we do not want a max pointer
+ relative to cmdStart. We want a max pointer that points at the
+ physical end of the command queue.
+ -------------------------------------------------------------------- */
+
+ cmdMax = (cmdStart + 4 + (ch->mailbox->cmax));
+
+ if (ch->board->membase < (unsigned char *)0x100000)
+ memaddr = ch->board->membase;
+ else
+ memaddr = ch->board->re_map_membase;
+
+ /*
+ The below command is necessary because newer kernels (2.1.x and
+ up) do not have a 1:1 virtual to physical mapping. The below
+ call adjust for that.
+ */
+
+ memaddr = (unsigned char *)bus_to_virt((unsigned long)memaddr);
+
+ if (head >= (cmdMax - cmdStart) || (head & 03))
+ {
+ printk(KERN_ERR "line %d: Out of range, cmd = %x, head = %x\n", __LINE__,
+ cmd, head);
+ printk(KERN_ERR "line %d: Out of range, cmdMax = %x, cmdStart = %x\n", __LINE__,
+ cmdMax, cmdStart);
+ return;
+ }
+
+ if (bytecmd)
+ {
+ *(volatile unchar *)(memaddr + head + cmdStart + 0) = (unchar)cmd;
+
+ *(volatile unchar *)(memaddr + head + cmdStart + 1) = (unchar)ch->channelnum;
+ /* Below word_or_byte is bits to set */
+ *(volatile unchar *)(memaddr + head + cmdStart + 2) = (unchar)word_or_byte;
+ /* Below byte2 is bits to reset */
+ *(volatile unchar *)(memaddr + head + cmdStart + 3) = (unchar)byte2;
+
+ }
+ else
+ {
+ *(volatile unchar *)(memaddr + head + cmdStart + 0) = (unchar)cmd;
+ *(volatile unchar *)(memaddr + head + cmdStart + 1) = (unchar)ch->channelnum;
+ *(volatile ushort*)(memaddr + head + cmdStart + 2) = (ushort)word_or_byte;
+ }
+
+ head = (head + 4) & (cmdMax - cmdStart - 4);
+ ch->mailbox->cin = head;
+
+ count = FEPTIMEOUT;
+
+ for (;;)
+ { /* Begin forever loop */
+
+ count--;
+ if (count == 0)
+ {
+ printk(KERN_ERR "<Error> - Fep not responding in fepcmd()\n");
+ return;
+ }
+
+ head = ch->mailbox->cin;
+ cmdTail = ch->mailbox->cout;
+
+ n = (head - cmdTail) & (cmdMax - cmdStart - 4);
+
+ /* ----------------------------------------------------------
+ Basically this will break when the FEP acknowledges the
+ command by incrementing cmdTail (Making it equal to head).
+ ------------------------------------------------------------- */
+
+ if (n <= ncmds * (sizeof(short) * 4))
+ break; /* Well nearly forever :-) */
+
+ } /* End forever loop */
+
+} /* End fepcmd */
+
+/* ---------------------------------------------------------------------
+ Digi products use fields in their channels structures that are very
+ similar to the c_cflag and c_iflag fields typically found in UNIX
+ termios structures. The below three routines allow mappings
+ between these hardware "flags" and their respective Linux flags.
+------------------------------------------------------------------------- */
+
+/* --------------------- Begin termios2digi_h -------------------- */
+
+static unsigned termios2digi_h(struct channel *ch, unsigned cflag)
+{ /* Begin termios2digi_h */
+
+ unsigned res = 0;
+
+ if (cflag & CRTSCTS)
+ {
+ ch->digiext.digi_flags |= (RTSPACE | CTSPACE);
+ res |= ((ch->m_cts) | (ch->m_rts));
+ }
+
+ if (ch->digiext.digi_flags & RTSPACE)
+ res |= ch->m_rts;
+
+ if (ch->digiext.digi_flags & DTRPACE)
+ res |= ch->m_dtr;
+
+ if (ch->digiext.digi_flags & CTSPACE)
+ res |= ch->m_cts;
+
+ if (ch->digiext.digi_flags & DSRPACE)
+ res |= ch->dsr;
+
+ if (ch->digiext.digi_flags & DCDPACE)
+ res |= ch->dcd;
+
+ if (res & (ch->m_rts))
+ ch->digiext.digi_flags |= RTSPACE;
+
+ if (res & (ch->m_cts))
+ ch->digiext.digi_flags |= CTSPACE;
+
+ return res;
+
+} /* End termios2digi_h */
+
+/* --------------------- Begin termios2digi_i -------------------- */
+static unsigned termios2digi_i(struct channel *ch, unsigned iflag)
+{ /* Begin termios2digi_i */
+
+ unsigned res = iflag & (IGNBRK | BRKINT | IGNPAR | PARMRK |
+ INPCK | ISTRIP|IXON|IXANY|IXOFF);
+
+ if (ch->digiext.digi_flags & DIGI_AIXON)
+ res |= IAIXON;
+ return res;
+
+} /* End termios2digi_i */
+
+/* --------------------- Begin termios2digi_c -------------------- */
+
+static unsigned termios2digi_c(struct channel *ch, unsigned cflag)
+{ /* Begin termios2digi_c */
+
+ unsigned res = 0;
+
+#ifdef SPEED_HACK
+ /* CL: HACK to force 115200 at 38400 and 57600 at 19200 Baud */
+ if ((cflag & CBAUD)== B38400) cflag=cflag - B38400 + B115200;
+ if ((cflag & CBAUD)== B19200) cflag=cflag - B19200 + B57600;
+#endif /* SPEED_HACK */
+
+ if (cflag & CBAUDEX)
+ { /* Begin detected CBAUDEX */
+
+ ch->digiext.digi_flags |= DIGI_FAST;
+
+ /* -------------------------------------------------------------
+ HUPCL bit is used by FEP to indicate fast baud
+ table is to be used.
+ ----------------------------------------------------------------- */
+
+ res |= FEP_HUPCL;
+
+ } /* End detected CBAUDEX */
+ else ch->digiext.digi_flags &= ~DIGI_FAST;
+
+ /* -------------------------------------------------------------------
+ CBAUD has bit position 0x1000 set these days to indicate Linux
+ baud rate remap. Digi hardware can't handle the bit assignment.
+ (We use a different bit assignment for high speed.). Clear this
+ bit out.
+ ---------------------------------------------------------------------- */
+ res |= cflag & ((CBAUD ^ CBAUDEX) | PARODD | PARENB | CSTOPB | CSIZE);
+
+ /* -------------------------------------------------------------
+ This gets a little confusing. The Digi cards have their own
+ representation of c_cflags controling baud rate. For the most
+ part this is identical to the Linux implementation. However;
+ Digi supports one rate (76800) that Linux doesn't. This means
+ that the c_cflag entry that would normally mean 76800 for Digi
+ actually means 115200 under Linux. Without the below mapping,
+ a stty 115200 would only drive the board at 76800. Since
+ the rate 230400 is also found after 76800, the same problem afflicts
+ us when we choose a rate of 230400. Without the below modificiation
+ stty 230400 would actually give us 115200.
+
+ There are two additional differences. The Linux value for CLOCAL
+ (0x800; 0004000) has no meaning to the Digi hardware. Also in
+ later releases of Linux; the CBAUD define has CBAUDEX (0x1000;
+ 0010000) ored into it (CBAUD = 0x100f as opposed to 0xf). CBAUDEX
+ should be checked for a screened out prior to termios2digi_c
+ returning. Since CLOCAL isn't used by the board this can be
+ ignored as long as the returned value is used only by Digi hardware.
+ ----------------------------------------------------------------- */
+
+ if (cflag & CBAUDEX)
+ {
+ /* -------------------------------------------------------------
+ The below code is trying to guarantee that only baud rates
+ 115200 and 230400 are remapped. We use exclusive or because
+ the various baud rates share common bit positions and therefore
+ can't be tested for easily.
+ ----------------------------------------------------------------- */
+
+
+ if ((!((cflag & 0x7) ^ (B115200 & ~CBAUDEX))) ||
+ (!((cflag & 0x7) ^ (B230400 & ~CBAUDEX))))
+ {
+ res += 1;
+ }
+ }
+
+ return res;
+
+} /* End termios2digi_c */
+
+/* --------------------- Begin epcaparam ----------------------- */
+
+static void epcaparam(struct tty_struct *tty, struct channel *ch)
+{ /* Begin epcaparam */
+
+ unsigned int cmdHead;
+ struct termios *ts;
+ volatile struct board_chan *bc;
+ unsigned mval, hflow, cflag, iflag;
+
+ bc = ch->brdchan;
+ epcaassert(bc !=0, "bc out of range");
+
+ assertgwinon(ch);
+
+ ts = tty->termios;
+
+ if ((ts->c_cflag & CBAUD) == 0)
+ { /* Begin CBAUD detected */
+
+ cmdHead = bc->rin;
+ bc->rout = cmdHead;
+ cmdHead = bc->tin;
+
+ /* Changing baud in mid-stream transmission can be wonderful */
+ /* ---------------------------------------------------------------
+ Flush current transmit buffer by setting cmdTail pointer (tout)
+ to cmdHead pointer (tin). Hopefully the transmit buffer is empty.
+ ----------------------------------------------------------------- */
+
+ fepcmd(ch, STOUT, (unsigned) cmdHead, 0, 0, 0);
+ mval = 0;
+
+ } /* End CBAUD detected */
+ else
+ { /* Begin CBAUD not detected */
+
+ /* -------------------------------------------------------------------
+ c_cflags have changed but that change had nothing to do with BAUD.
+ Propagate the change to the card.
+ ---------------------------------------------------------------------- */
+
+ cflag = termios2digi_c(ch, ts->c_cflag);
+
+ if (cflag != ch->fepcflag)
+ {
+ ch->fepcflag = cflag;
+ /* Set baud rate, char size, stop bits, parity */
+ fepcmd(ch, SETCTRLFLAGS, (unsigned) cflag, 0, 0, 0);
+ }
+
+
+ /* ----------------------------------------------------------------
+ If the user has not forced CLOCAL and if the device is not a
+ CALLOUT device (Which is always CLOCAL) we set flags such that
+ the driver will wait on carrier detect.
+ ------------------------------------------------------------------- */
+
+ if ((ts->c_cflag & CLOCAL) || (tty->driver.subtype == SERIAL_TYPE_CALLOUT))
+ { /* Begin it is a cud device or a ttyD device with CLOCAL on */
+ ch->asyncflags &= ~ASYNC_CHECK_CD;
+ } /* End it is a cud device or a ttyD device with CLOCAL on */
+ else
+ { /* Begin it is a ttyD device */
+ ch->asyncflags |= ASYNC_CHECK_CD;
+ } /* End it is a ttyD device */
+
+ mval = ch->m_dtr | ch->m_rts;
+
+ } /* End CBAUD not detected */
+
+ iflag = termios2digi_i(ch, ts->c_iflag);
+
+ /* Check input mode flags */
+
+ if (iflag != ch->fepiflag)
+ {
+ ch->fepiflag = iflag;
+
+ /* ---------------------------------------------------------------
+ Command sets channels iflag structure on the board. Such things
+ as input soft flow control, handeling of parity errors, and
+ break handeling are all set here.
+ ------------------------------------------------------------------- */
+
+ /* break handeling, parity handeling, input stripping, flow control chars */
+ fepcmd(ch, SETIFLAGS, (unsigned int) ch->fepiflag, 0, 0, 0);
+ }
+
+ /* ---------------------------------------------------------------
+ Set the board mint value for this channel. This will cause hardware
+ events to be generated each time the DCD signal (Described in mint)
+ changes.
+ ------------------------------------------------------------------- */
+ bc->mint = ch->dcd;
+
+ if ((ts->c_cflag & CLOCAL) || (ch->digiext.digi_flags & DIGI_FORCEDCD))
+ if (ch->digiext.digi_flags & DIGI_FORCEDCD)
+ bc->mint = 0;
+
+ ch->imodem = bc->mstat;
+
+ hflow = termios2digi_h(ch, ts->c_cflag);
+
+ if (hflow != ch->hflow)
+ {
+ ch->hflow = hflow;
+
+ /* --------------------------------------------------------------
+ Hard flow control has been selected but the board is not
+ using it. Activate hard flow control now.
+ ----------------------------------------------------------------- */
+
+ fepcmd(ch, SETHFLOW, hflow, 0xff, 0, 1);
+ }
+
+
+ mval ^= ch->modemfake & (mval ^ ch->modem);
+
+ if (ch->omodem ^ mval)
+ {
+ ch->omodem = mval;
+
+ /* --------------------------------------------------------------
+ The below command sets the DTR and RTS mstat structure. If
+ hard flow control is NOT active these changes will drive the
+ output of the actual DTR and RTS lines. If hard flow control
+ is active, the changes will be saved in the mstat structure and
+ only asserted when hard flow control is turned off.
+ ----------------------------------------------------------------- */
+
+ /* First reset DTR & RTS; then set them */
+ fepcmd(ch, SETMODEM, 0, ((ch->m_dtr)|(ch->m_rts)), 0, 1);
+ fepcmd(ch, SETMODEM, mval, 0, 0, 1);
+
+ }
+
+ if (ch->startc != ch->fepstartc || ch->stopc != ch->fepstopc)
+ {
+ ch->fepstartc = ch->startc;
+ ch->fepstopc = ch->stopc;
+
+ /* ------------------------------------------------------------
+ The XON / XOFF characters have changed; propogate these
+ changes to the card.
+ --------------------------------------------------------------- */
+
+ fepcmd(ch, SONOFFC, ch->fepstartc, ch->fepstopc, 0, 1);
+ }
+
+ if (ch->startca != ch->fepstartca || ch->stopca != ch->fepstopca)
+ {
+ ch->fepstartca = ch->startca;
+ ch->fepstopca = ch->stopca;
+
+ /* ---------------------------------------------------------------
+ Similar to the above, this time the auxilarly XON / XOFF
+ characters have changed; propogate these changes to the card.
+ ------------------------------------------------------------------ */
+
+ fepcmd(ch, SAUXONOFFC, ch->fepstartca, ch->fepstopca, 0, 1);
+ }
+
+} /* End epcaparam */
+
+/* --------------------- Begin receive_data ----------------------- */
+
+static void receive_data(struct channel *ch)
+{ /* Begin receive_data */
+
+ unchar *rptr;
+ struct termios *ts = 0;
+ struct tty_struct *tty;
+ volatile struct board_chan *bc;
+ register int dataToRead, wrapgap, bytesAvailable;
+ register unsigned int tail, head;
+ unsigned int wrapmask;
+ int rc;
+
+
+ /* ---------------------------------------------------------------
+ This routine is called by doint when a receive data event
+ has taken place.
+ ------------------------------------------------------------------- */
+
+ globalwinon(ch);
+
+ if (ch->statusflags & RXSTOPPED)
+ return;
+
+ tty = ch->tty;
+ if (tty)
+ ts = tty->termios;
+
+ bc = ch->brdchan;
+
+ if (!bc)
+ {
+ printk(KERN_ERR "<Error> - bc is NULL in receive_data!\n");
+ return;
+ }
+
+ wrapmask = ch->rxbufsize - 1;
+
+ /* ---------------------------------------------------------------------
+ Get the head and tail pointers to the receiver queue. Wrap the
+ head pointer if it has reached the end of the buffer.
+ ------------------------------------------------------------------------ */
+
+ head = bc->rin;
+ head &= wrapmask;
+ tail = bc->rout & wrapmask;
+
+ bytesAvailable = (head - tail) & wrapmask;
+
+ if (bytesAvailable == 0)
+ return;
+
+ /* ------------------------------------------------------------------
+ If CREAD bit is off or device not open, set TX tail to head
+ --------------------------------------------------------------------- */
+
+ if (!tty || !ts || !(ts->c_cflag & CREAD))
+ {
+ bc->rout = head;
+ return;
+ }
+
+ if (tty->flip.count == TTY_FLIPBUF_SIZE)
+ return;
+
+ if (bc->orun)
+ {
+ bc->orun = 0;
+ printk(KERN_WARNING "overrun! DigiBoard device minor = %d\n",MINOR(tty->device));
+ }
+
+ rxwinon(ch);
+ rptr = tty->flip.char_buf_ptr;
+ rc = tty->flip.count;
+
+ while (bytesAvailable > 0)
+ { /* Begin while there is data on the card */
+
+ wrapgap = (head >= tail) ? head - tail : ch->rxbufsize - tail;
+
+ /* ---------------------------------------------------------------
+ Even if head has wrapped around only report the amount of
+ data to be equal to the size - tail. Remember memcpy can't
+ automaticly wrap around the receive buffer.
+ ----------------------------------------------------------------- */
+
+ dataToRead = (wrapgap < bytesAvailable) ? wrapgap : bytesAvailable;
+
+ /* --------------------------------------------------------------
+ Make sure we don't overflow the buffer
+ ----------------------------------------------------------------- */
+
+ if ((rc + dataToRead) > TTY_FLIPBUF_SIZE)
+ dataToRead = TTY_FLIPBUF_SIZE - rc;
+
+ if (dataToRead == 0)
+ break;
+
+ /* ---------------------------------------------------------------
+ Move data read from our card into the line disciplines buffer
+ for translation if necessary.
+ ------------------------------------------------------------------ */
+
+ if ((memcpy(rptr, ch->rxptr + tail, dataToRead)) != rptr)
+ printk(KERN_ERR "<Error> - receive_data : memcpy failed\n");
+
+ rc += dataToRead;
+ rptr += dataToRead;
+ tail = (tail + dataToRead) & wrapmask;
+ bytesAvailable -= dataToRead;
+
+ } /* End while there is data on the card */
+
+
+ tty->flip.count = rc;
+ tty->flip.char_buf_ptr = rptr;
+ globalwinon(ch);
+ bc->rout = tail;
+
+ /* Must be called with global data */
+ tty_schedule_flip(ch->tty);
+ return;
+
+} /* End receive_data */
+
+/* --------------------- Begin pc_ioctl ----------------------- */
+
+static int pc_ioctl(struct tty_struct *tty, struct file * file,
+ unsigned int cmd, unsigned long arg)
+{ /* Begin pc_ioctl */
+
+ digiflow_t dflow;
+ int retval, error;
+ unsigned long flags;
+ unsigned int mflag, mstat;
+ unsigned char startc, stopc;
+ volatile struct board_chan *bc;
+ struct channel *ch = (struct channel *) tty->driver_data;
+
+ /* The control device has it's own set of commands */
+ if (tty->driver.subtype == SERIAL_TYPE_INFO)
+ { /* Begin if subtype is the control device */
+
+ switch (cmd)
+ { /* Begin switch cmd */
+
+ case DIGI_GETINFO:
+ { /* Begin case DIGI_GETINFO */
+
+ struct digi_info di ;
+ int brd;
+
+ getUser(brd, (unsigned int *)arg);
+
+ if ((error = verify_area(VERIFY_WRITE, (char*)arg, sizeof(di))))
+ {
+ printk(KERN_ERR "DIGI_GETINFO : verify area size 0x%x failed\n",sizeof(di));
+ return(error);
+ }
+
+ if ((brd < 0) || (brd >= num_cards) || (num_cards == 0))
+ return (-ENODEV);
+
+ memset(&di, 0, sizeof(di));
+
+ di.board = brd ;
+ di.status = boards[brd].status;
+ di.type = boards[brd].type ;
+ di.numports = boards[brd].numports ;
+ di.port = boards[brd].port ;
+ di.membase = boards[brd].membase ;
+
+ copy_to_user((char *)arg, &di, sizeof (di));
+ break;
+
+ } /* End case DIGI_GETINFO */
+
+ case DIGI_POLLER:
+ { /* Begin case DIGI_POLLER */
+
+ int brd = arg & 0xff000000 >> 16 ;
+ unsigned char state = arg & 0xff ;
+
+ if ((brd < 0) || (brd >= num_cards))
+ {
+ printk(KERN_ERR "<Error> - DIGI POLLER : brd not valid!\n");
+ return (-ENODEV);
+ }
+
+ digi_poller_inhibited = state ;
+ break ;
+
+ } /* End case DIGI_POLLER */
+
+ case DIGI_INIT:
+ { /* Begin case DIGI_INIT */
+
+ /* ------------------------------------------------------------
+ This call is made by the apps to complete the initilization
+ of the board(s). This routine is responsible for setting
+ the card to its initial state and setting the drivers control
+ fields to the sutianle settings for the card in question.
+ ---------------------------------------------------------------- */
+
+ int crd ;
+ for (crd = 0; crd < num_cards; crd++)
+ post_fep_init (crd);
+
+ break ;
+
+ } /* End case DIGI_INIT */
+
+
+ default:
+ return -ENOIOCTLCMD;
+
+ } /* End switch cmd */
+ return (0) ;
+
+ } /* End if subtype is the control device */
+
+ if (ch)
+ bc = ch->brdchan;
+ else
+ {
+ printk(KERN_ERR "<Error> - ch is NULL in pc_ioctl!\n");
+ return(-EINVAL);
+ }
+
+ save_flags(flags);
+
+ /* -------------------------------------------------------------------
+ For POSIX compliance we need to add more ioctls. See tty_ioctl.c
+ in /usr/src/linux/drivers/char for a good example. In particular
+ think about adding TCSETAF, TCSETAW, TCSETA, TCSETSF, TCSETSW, TCSETS.
+ ---------------------------------------------------------------------- */
+
+ switch (cmd)
+ { /* Begin switch cmd */
+
+ case TCGETS:
+ retval = verify_area(VERIFY_WRITE, (void *)arg,
+ sizeof(struct termios));
+
+ if (retval)
+ return(retval);
+
+ copy_to_user((struct termios *)arg,
+ tty->termios, sizeof(struct termios));
+ return(0);
+
+ case TCGETA:
+ return get_termio(tty, (struct termio *)arg);
+
+ case TCSBRK: /* SVID version: non-zero arg --> no break */
+
+ retval = tty_check_change(tty);
+ if (retval)
+ return retval;
+
+ /* Setup an event to indicate when the transmit buffer empties */
+
+ setup_empty_event(tty,ch);
+ tty_wait_until_sent(tty, 0);
+ if (!arg)
+ digi_send_break(ch, HZ/4); /* 1/4 second */
+ return 0;
+
+ case TCSBRKP: /* support for POSIX tcsendbreak() */
+
+ retval = tty_check_change(tty);
+ if (retval)
+ return retval;
+
+ /* Setup an event to indicate when the transmit buffer empties */
+
+ setup_empty_event(tty,ch);
+ tty_wait_until_sent(tty, 0);
+ digi_send_break(ch, arg ? arg*(HZ/10) : HZ/4);
+ return 0;
+
+ case TIOCGSOFTCAR:
+
+ error = verify_area(VERIFY_WRITE, (void *) arg,sizeof(long));
+ if (error)
+ return error;
+
+ putUser(C_CLOCAL(tty) ? 1 : 0,
+ (unsigned long *) arg);
+ return 0;
+
+ case TIOCSSOFTCAR:
+ /*RONNIE PUT VERIFY_READ (See above) check here */
+ {
+ unsigned int value;
+
+ getUser(value, (unsigned int *)arg);
+ tty->termios->c_cflag =
+ ((tty->termios->c_cflag & ~CLOCAL) |
+ (value ? CLOCAL : 0));
+ return 0;
+ }
+
+ case TIOCMODG:
+ case TIOCMGET:
+
+ mflag = 0;
+
+ cli();
+ globalwinon(ch);
+ mstat = bc->mstat;
+ memoff(ch);
+ restore_flags(flags);
+
+ if (mstat & ch->m_dtr)
+ mflag |= TIOCM_DTR;
+
+ if (mstat & ch->m_rts)
+ mflag |= TIOCM_RTS;
+
+ if (mstat & ch->m_cts)
+ mflag |= TIOCM_CTS;
+
+ if (mstat & ch->dsr)
+ mflag |= TIOCM_DSR;
+
+ if (mstat & ch->m_ri)
+ mflag |= TIOCM_RI;
+
+ if (mstat & ch->dcd)
+ mflag |= TIOCM_CD;
+
+ error = verify_area(VERIFY_WRITE, (void *) arg,sizeof(long));
+
+ if (error)
+ return error;
+
+ putUser(mflag, (unsigned long *) arg);
+
+ break;
+
+ case TIOCMBIS:
+ case TIOCMBIC:
+ case TIOCMODS:
+ case TIOCMSET:
+
+ getUser(mstat, (unsigned int *)arg);
+
+ mflag = 0;
+ if (mstat & TIOCM_DTR)
+ mflag |= ch->m_dtr;
+
+ if (mstat & TIOCM_RTS)
+ mflag |= ch->m_rts;
+
+ switch (cmd)
+ { /* Begin switch cmd */
+
+ case TIOCMODS:
+ case TIOCMSET:
+ ch->modemfake = ch->m_dtr|ch->m_rts;
+ ch->modem = mflag;
+ break;
+
+ case TIOCMBIS:
+ ch->modemfake |= mflag;
+ ch->modem |= mflag;
+ break;
+
+ case TIOCMBIC:
+ ch->modemfake |= mflag;
+ ch->modem &= ~mflag;
+ break;
+
+ } /* End switch cmd */
+
+ cli();
+ globalwinon(ch);
+
+ /* --------------------------------------------------------------
+ The below routine generally sets up parity, baud, flow control
+ issues, etc.... It effect both control flags and input flags.
+ ------------------------------------------------------------------ */
+
+ epcaparam(tty,ch);
+ memoff(ch);
+ restore_flags(flags);
+ break;
+
+ case TIOCSDTR:
+ ch->omodem |= ch->m_dtr;
+ cli();
+ globalwinon(ch);
+ fepcmd(ch, SETMODEM, ch->m_dtr, 0, 10, 1);
+ memoff(ch);
+ restore_flags(flags);
+ break;
+
+ case TIOCCDTR:
+ ch->omodem &= ~ch->m_dtr;
+ cli();
+ globalwinon(ch);
+ fepcmd(ch, SETMODEM, 0, ch->m_dtr, 10, 1);
+ memoff(ch);
+ restore_flags(flags);
+ break;
+
+ case DIGI_GETA:
+ if ((error=
+ verify_area(VERIFY_WRITE, (char*)arg, sizeof(digi_t))))
+ {
+ printk(KERN_ERR "<Error> - Digi GETA failed\n");
+ return(error);
+ }
+
+ copy_to_user((char*)arg, &ch->digiext, sizeof(digi_t));
+ break;
+
+ case DIGI_SETAW:
+ case DIGI_SETAF:
+ if ((cmd) == (DIGI_SETAW))
+ {
+ /* Setup an event to indicate when the transmit buffer empties */
+
+ setup_empty_event(tty,ch);
+ tty_wait_until_sent(tty, 0);
+ }
+ else
+ {
+ if (tty->ldisc.flush_buffer)
+ tty->ldisc.flush_buffer(tty);
+ }
+
+ /* Fall Thru */
+
+ case DIGI_SETA:
+ if ((error =
+ verify_area(VERIFY_READ, (char*)arg,sizeof(digi_t))))
+ return(error);
+
+ copy_from_user(&ch->digiext, (char*)arg, sizeof(digi_t));
+
+ if (ch->digiext.digi_flags & DIGI_ALTPIN)
+ {
+ ch->dcd = ch->m_dsr;
+ ch->dsr = ch->m_dcd;
+ }
+ else
+ {
+ ch->dcd = ch->m_dcd;
+ ch->dsr = ch->m_dsr;
+ }
+
+ cli();
+ globalwinon(ch);
+
+ /* -----------------------------------------------------------------
+ The below routine generally sets up parity, baud, flow control
+ issues, etc.... It effect both control flags and input flags.
+ ------------------------------------------------------------------- */
+
+ epcaparam(tty,ch);
+ memoff(ch);
+ restore_flags(flags);
+ break;
+
+ case DIGI_GETFLOW:
+ case DIGI_GETAFLOW:
+ cli();
+ globalwinon(ch);
+ if ((cmd) == (DIGI_GETFLOW))
+ {
+ dflow.startc = bc->startc;
+ dflow.stopc = bc->stopc;
+ }
+ else
+ {
+ dflow.startc = bc->startca;
+ dflow.stopc = bc->stopca;
+ }
+ memoff(ch);
+ restore_flags(flags);
+
+ if ((error = verify_area(VERIFY_WRITE, (char*)arg,sizeof(dflow))))
+ return(error);
+
+ copy_to_user((char*)arg, &dflow, sizeof(dflow));
+ break;
+
+ case DIGI_SETAFLOW:
+ case DIGI_SETFLOW:
+ if ((cmd) == (DIGI_SETFLOW))
+ {
+ startc = ch->startc;
+ stopc = ch->stopc;
+ }
+ else
+ {
+ startc = ch->startca;
+ stopc = ch->stopca;
+ }
+
+ if ((error = verify_area(VERIFY_READ, (char*)arg,sizeof(dflow))))
+ return(error);
+
+ copy_from_user(&dflow, (char*)arg, sizeof(dflow));
+
+ if (dflow.startc != startc || dflow.stopc != stopc)
+ { /* Begin if setflow toggled */
+ cli();
+ globalwinon(ch);
+
+ if ((cmd) == (DIGI_SETFLOW))
+ {
+ ch->fepstartc = ch->startc = dflow.startc;
+ ch->fepstopc = ch->stopc = dflow.stopc;
+ fepcmd(ch, SONOFFC, ch->fepstartc, ch->fepstopc, 0, 1);
+ }
+ else
+ {
+ ch->fepstartca = ch->startca = dflow.startc;
+ ch->fepstopca = ch->stopca = dflow.stopc;
+ fepcmd(ch, SAUXONOFFC, ch->fepstartca, ch->fepstopca, 0, 1);
+ }
+
+ if (ch->statusflags & TXSTOPPED)
+ pc_start(tty);
+
+ memoff(ch);
+ restore_flags(flags);
+
+ } /* End if setflow toggled */
+ break;
+
+ default:
+ return -ENOIOCTLCMD;
+
+ } /* End switch cmd */
+
+ return 0;
+
+} /* End pc_ioctl */
+
+/* --------------------- Begin pc_set_termios ----------------------- */
+
+static void pc_set_termios(struct tty_struct *tty, struct termios *old_termios)
+{ /* Begin pc_set_termios */
+
+ struct channel *ch;
+ unsigned long flags;
+
+ /* ---------------------------------------------------------
+ verifyChannel returns the channel from the tty struct
+ if it is valid. This serves as a sanity check.
+ ------------------------------------------------------------- */
+
+ if ((ch = verifyChannel(tty)) != NULL)
+ { /* Begin if channel valid */
+
+ save_flags(flags);
+ cli();
+ globalwinon(ch);
+ epcaparam(tty, ch);
+ memoff(ch);
+
+ if ((old_termios->c_cflag & CRTSCTS) &&
+ ((tty->termios->c_cflag & CRTSCTS) == 0))
+ tty->hw_stopped = 0;
+
+ if (!(old_termios->c_cflag & CLOCAL) &&
+ (tty->termios->c_cflag & CLOCAL))
+ wake_up_interruptible(&ch->open_wait);
+
+ restore_flags(flags);
+
+ } /* End if channel valid */
+
+} /* End pc_set_termios */
+
+/* --------------------- Begin do_softint ----------------------- */
+
+static void do_softint(void *private_)
+{ /* Begin do_softint */
+
+ struct channel *ch = (struct channel *) private_;
+
+
+ /* Called in response to a modem change event */
+
+ if (ch && ch->magic == EPCA_MAGIC)
+ { /* Begin EPCA_MAGIC */
+
+ struct tty_struct *tty = ch->tty;
+
+ if (tty && tty->driver_data)
+ {
+ if (test_and_clear_bit(EPCA_EVENT_HANGUP, &ch->event))
+ { /* Begin if clear_bit */
+
+ tty_hangup(tty);
+ wake_up_interruptible(&ch->open_wait);
+ ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CALLOUT_ACTIVE);
+
+ } /* End if clear_bit */
+ }
+
+ } /* End EPCA_MAGIC */
+
+} /* End do_softint */
+
+/* ------------------------------------------------------------
+ pc_stop and pc_start provide software flow control to the
+ routine and the pc_ioctl routine.
+---------------------------------------------------------------- */
+
+/* --------------------- Begin pc_stop ----------------------- */
+
+static void pc_stop(struct tty_struct *tty)
+{ /* Begin pc_stop */
+
+ struct channel *ch;
+ unsigned long flags;
+
+ /* ---------------------------------------------------------
+ verifyChannel returns the channel from the tty struct
+ if it is valid. This serves as a sanity check.
+ ------------------------------------------------------------- */
+
+ if ((ch = verifyChannel(tty)) != NULL)
+ { /* Begin if valid channel */
+
+ save_flags(flags);
+ cli();
+
+ if ((ch->statusflags & TXSTOPPED) == 0)
+ { /* Begin if transmit stop requested */
+
+ globalwinon(ch);
+
+ /* STOP transmitting now !! */
+
+ fepcmd(ch, PAUSETX, 0, 0, 0, 0);
+
+ ch->statusflags |= TXSTOPPED;
+ memoff(ch);
+
+ } /* End if transmit stop requested */
+
+ restore_flags(flags);
+
+ } /* End if valid channel */
+
+} /* End pc_stop */
+
+/* --------------------- Begin pc_start ----------------------- */
+
+static void pc_start(struct tty_struct *tty)
+{ /* Begin pc_start */
+
+ struct channel *ch;
+
+ /* ---------------------------------------------------------
+ verifyChannel returns the channel from the tty struct
+ if it is valid. This serves as a sanity check.
+ ------------------------------------------------------------- */
+
+ if ((ch = verifyChannel(tty)) != NULL)
+ { /* Begin if channel valid */
+
+ unsigned long flags;
+
+ save_flags(flags);
+ cli();
+
+ /* Just in case output was resumed because of a change in Digi-flow */
+ if (ch->statusflags & TXSTOPPED)
+ { /* Begin transmit resume requested */
+
+ volatile struct board_chan *bc;
+
+ globalwinon(ch);
+ bc = ch->brdchan;
+ if (ch->statusflags & LOWWAIT)
+ bc->ilow = 1;
+
+ /* Okay, you can start transmitting again... */
+
+ fepcmd(ch, RESUMETX, 0, 0, 0, 0);
+
+ ch->statusflags &= ~TXSTOPPED;
+ memoff(ch);
+
+ } /* End transmit resume requested */
+
+ restore_flags(flags);
+
+ } /* End if channel valid */
+
+} /* End pc_start */
+
+/* ------------------------------------------------------------------
+ The below routines pc_throttle and pc_unthrottle are used
+ to slow (And resume) the receipt of data into the kernels
+ receive buffers. The exact occurence of this depends on the
+ size of the kernels receive buffer and what the 'watermarks'
+ are set to for that buffer. See the n_ttys.c file for more
+ details.
+______________________________________________________________________ */
+/* --------------------- Begin throttle ----------------------- */
+
+static void pc_throttle(struct tty_struct * tty)
+{ /* Begin pc_throttle */
+
+ struct channel *ch;
+ unsigned long flags;
+
+ /* ---------------------------------------------------------
+ verifyChannel returns the channel from the tty struct
+ if it is valid. This serves as a sanity check.
+ ------------------------------------------------------------- */
+
+ if ((ch = verifyChannel(tty)) != NULL)
+ { /* Begin if channel valid */
+
+
+ save_flags(flags);
+ cli();
+
+ if ((ch->statusflags & RXSTOPPED) == 0)
+ {
+ globalwinon(ch);
+ fepcmd(ch, PAUSERX, 0, 0, 0, 0);
+
+ ch->statusflags |= RXSTOPPED;
+ memoff(ch);
+ }
+ restore_flags(flags);
+
+ } /* End if channel valid */
+
+} /* End pc_throttle */
+
+/* --------------------- Begin unthrottle ----------------------- */
+
+static void pc_unthrottle(struct tty_struct *tty)
+{ /* Begin pc_unthrottle */
+
+ struct channel *ch;
+ unsigned long flags;
+ volatile struct board_chan *bc;
+
+
+ /* ---------------------------------------------------------
+ verifyChannel returns the channel from the tty struct
+ if it is valid. This serves as a sanity check.
+ ------------------------------------------------------------- */
+
+ if ((ch = verifyChannel(tty)) != NULL)
+ { /* Begin if channel valid */
+
+
+ /* Just in case output was resumed because of a change in Digi-flow */
+ save_flags(flags);
+ cli();
+
+ if (ch->statusflags & RXSTOPPED)
+ {
+
+ globalwinon(ch);
+ bc = ch->brdchan;
+ fepcmd(ch, RESUMERX, 0, 0, 0, 0);
+
+ ch->statusflags &= ~RXSTOPPED;
+ memoff(ch);
+ }
+ restore_flags(flags);
+
+ } /* End if channel valid */
+
+} /* End pc_unthrottle */
+
+/* --------------------- Begin digi_send_break ----------------------- */
+
+void digi_send_break(struct channel *ch, int msec)
+{ /* Begin digi_send_break */
+
+ unsigned long flags;
+
+ save_flags(flags);
+ cli();
+ globalwinon(ch);
+
+ /* --------------------------------------------------------------------
+ Maybe I should send an infinite break here, schedule() for
+ msec amount of time, and then stop the break. This way,
+ the user can't screw up the FEP by causing digi_send_break()
+ to be called (i.e. via an ioctl()) more than once in msec amount
+ of time. Try this for now...
+ ------------------------------------------------------------------------ */
+
+ fepcmd(ch, SENDBREAK, msec, 0, 10, 0);
+ memoff(ch);
+
+ restore_flags(flags);
+
+} /* End digi_send_break */
+
+/* --------------------- Begin setup_empty_event ----------------------- */
+
+static void setup_empty_event(struct tty_struct *tty, struct channel *ch)
+{ /* Begin setup_empty_event */
+
+ volatile struct board_chan *bc = ch->brdchan;
+ unsigned long int flags;
+
+ save_flags(flags);
+ cli();
+ globalwinon(ch);
+ ch->statusflags |= EMPTYWAIT;
+
+ /* ------------------------------------------------------------------
+ When set the iempty flag request a event to be generated when the
+ transmit buffer is empty (If there is no BREAK in progress).
+ --------------------------------------------------------------------- */
+
+ bc->iempty = 1;
+ memoff(ch);
+ restore_flags(flags);
+
+} /* End setup_empty_event */
+
+/* --------------------- Begin get_termio ----------------------- */
+
+static int get_termio(struct tty_struct * tty, struct termio * termio)
+{ /* Begin get_termio */
+ int error;
+
+ error = verify_area(VERIFY_WRITE, termio, sizeof (struct termio));
+ if (error)
+ return error;
+
+ kernel_termios_to_user_termio(termio, tty->termios);
+
+ return 0;
+} /* End get_termio */
+/* ---------------------- Begin epca_setup -------------------------- */
+void epca_setup(char *str, int *ints)
+{ /* Begin epca_setup */
+
+ struct board_info board;
+ int index, loop, last;
+ char *temp, *t2;
+ unsigned len;
+
+ /* ----------------------------------------------------------------------
+ If this routine looks a little strange it is because it is only called
+ if a LILO append command is given to boot the kernel with parameters.
+ In this way, we can provide the user a method of changing his board
+ configuration without rebuilding the kernel.
+ ----------------------------------------------------------------------- */
+ if (!liloconfig)
+ liloconfig = 1;
+
+ memset(&board, 0, sizeof(board));
+
+ /* Assume the data is int first, later we can change it */
+ /* I think that array position 0 of ints holds the number of args */
+ for (last = 0, index = 1; index <= ints[0]; index++)
+ switch(index)
+ { /* Begin parse switch */
+
+ case 1:
+ board.status = ints[index];
+
+ /* ---------------------------------------------------------
+ We check for 2 (As opposed to 1; because 2 is a flag
+ instructing the driver to ignore epcaconfig.) For this
+ reason we check for 2.
+ ------------------------------------------------------------ */
+ if (board.status == 2)
+ { /* Begin ignore epcaconfig as well as lilo cmd line */
+ nbdevs = 0;
+ num_cards = 0;
+ return;
+ } /* End ignore epcaconfig as well as lilo cmd line */
+
+ if (board.status > 2)
+ {
+ printk(KERN_ERR "<Error> - epca_setup: Invalid board status 0x%x\n", board.status);
+ invalid_lilo_config = 1;
+ setup_error_code |= INVALID_BOARD_STATUS;
+ return;
+ }
+ last = index;
+ break;
+
+ case 2:
+ board.type = ints[index];
+ if (board.type >= PCIXEM)
+ {
+ printk(KERN_ERR "<Error> - epca_setup: Invalid board type 0x%x\n", board.type);
+ invalid_lilo_config = 1;
+ setup_error_code |= INVALID_BOARD_TYPE;
+ return;
+ }
+ last = index;
+ break;
+
+ case 3:
+ board.altpin = ints[index];
+ if (board.altpin > 1)
+ {
+ printk(KERN_ERR "<Error> - epca_setup: Invalid board altpin 0x%x\n", board.altpin);
+ invalid_lilo_config = 1;
+ setup_error_code |= INVALID_ALTPIN;
+ return;
+ }
+ last = index;
+ break;
+
+ case 4:
+ board.numports = ints[index];
+ if ((board.numports < 2) || (board.numports > 256))
+ {
+ printk(KERN_ERR "<Error> - epca_setup: Invalid board numports 0x%x\n", board.numports);
+ invalid_lilo_config = 1;
+ setup_error_code |= INVALID_NUM_PORTS;
+ return;
+ }
+ nbdevs += board.numports;
+ last = index;
+ break;
+
+ case 5:
+ board.port = (unsigned char *)ints[index];
+ if (board.port <= 0)
+ {
+ printk(KERN_ERR "<Error> - epca_setup: Invalid io port 0x%x\n", (unsigned int)board.port);
+ invalid_lilo_config = 1;
+ setup_error_code |= INVALID_PORT_BASE;
+ return;
+ }
+ last = index;
+ break;
+
+ case 6:
+ board.membase = (unsigned char *)ints[index];
+ if (board.membase <= 0)
+ {
+ printk(KERN_ERR "<Error> - epca_setup: Invalid memory base 0x%x\n",(unsigned int)board.membase);
+ invalid_lilo_config = 1;
+ setup_error_code |= INVALID_MEM_BASE;
+ return;
+ }
+ last = index;
+ break;
+
+ default:
+ printk(KERN_ERR "<Error> - epca_setup: Too many integer parms\n");
+ return;
+
+ } /* End parse switch */
+
+ while (str && *str)
+ { /* Begin while there is a string arg */
+
+ /* find the next comma or terminator */
+ temp = str;
+
+ /* While string is not null, and a comma hasn't been found */
+ while (*temp && (*temp != ','))
+ temp++;
+
+ if (!*temp)
+ temp = NULL;
+ else
+ *temp++ = 0;
+
+ /* Set index to the number of args + 1 */
+ index = last + 1;
+
+ switch(index)
+ {
+ case 1:
+ len = strlen(str);
+ if (strncmp("Disable", str, len) == 0)
+ board.status = 0;
+ else
+ if (strncmp("Enable", str, len) == 0)
+ board.status = 1;
+ else
+ {
+ printk(KERN_ERR "<Error> - epca_setup: Invalid status %s\n", str);
+ invalid_lilo_config = 1;
+ setup_error_code |= INVALID_BOARD_STATUS;
+ return;
+ }
+ last = index;
+ break;
+
+ case 2:
+
+ for(loop = 0; loop < EPCA_NUM_TYPES; loop++)
+ if (strcmp(board_desc[loop], str) == 0)
+ break;
+
+
+ /* ---------------------------------------------------------------
+ If the index incremented above refers to a legitamate board
+ type set it here.
+ ------------------------------------------------------------------*/
+
+ if (index < EPCA_NUM_TYPES)
+ board.type = loop;
+ else
+ {
+ printk(KERN_ERR "<Error> - epca_setup: Invalid board type: %s\n", str);
+ invalid_lilo_config = 1;
+ setup_error_code |= INVALID_BOARD_TYPE;
+ return;
+ }
+ last = index;
+ break;
+
+ case 3:
+ len = strlen(str);
+ if (strncmp("Disable", str, len) == 0)
+ board.altpin = 0;
+ else
+ if (strncmp("Enable", str, len) == 0)
+ board.altpin = 1;
+ else
+ {
+ printk(KERN_ERR "<Error> - epca_setup: Invalid altpin %s\n", str);
+ invalid_lilo_config = 1;
+ setup_error_code |= INVALID_ALTPIN;
+ return;
+ }
+ last = index;
+ break;
+
+ case 4:
+ t2 = str;
+ while (isdigit(*t2))
+ t2++;
+
+ if (*t2)
+ {
+ printk(KERN_ERR "<Error> - epca_setup: Invalid port count %s\n", str);
+ invalid_lilo_config = 1;
+ setup_error_code |= INVALID_NUM_PORTS;
+ return;
+ }
+
+ /* ------------------------------------------------------------
+ There is not a man page for simple_strtoul but the code can be
+ found in vsprintf.c. The first argument is the string to
+ translate (To an unsigned long obviously), the second argument
+ can be the address of any character variable or a NULL. If a
+ variable is given, the end pointer of the string will be stored
+ in that variable; if a NULL is given the the end pointer will
+ not be returned. The last argument is the base to use. If
+ a 0 is indicated, the routine will attempt to determine the
+ proper base by looking at the values prefix (A '0' for octal,
+ a 'x' for hex, etc ... If a value is given it will use that
+ value as the base.
+ ---------------------------------------------------------------- */
+ board.numports = simple_strtoul(str, NULL, 0);
+ nbdevs += board.numports;
+ last = index;
+ break;
+
+ case 5:
+ t2 = str;
+ while (isxdigit(*t2))
+ t2++;
+
+ if (*t2)
+ {
+ printk(KERN_ERR "<Error> - epca_setup: Invalid i/o address %s\n", str);
+ invalid_lilo_config = 1;
+ setup_error_code |= INVALID_PORT_BASE;
+ return;
+ }
+
+ board.port = (unsigned char *)simple_strtoul(str, NULL, 16);
+ last = index;
+ break;
+
+ case 6:
+ t2 = str;
+ while (isxdigit(*t2))
+ t2++;
+
+ if (*t2)
+ {
+ printk(KERN_ERR "<Error> - epca_setup: Invalid memory base %s\n",str);
+ invalid_lilo_config = 1;
+ setup_error_code |= INVALID_MEM_BASE;
+ return;
+ }
+
+ board.membase = (unsigned char *)simple_strtoul(str, NULL, 16);
+ last = index;
+ break;
+
+ default:
+ printk(KERN_ERR "PC/Xx: Too many string parms\n");
+ return;
+ }
+ str = temp;
+
+ } /* End while there is a string arg */
+
+
+ if (last < 6)
+ {
+ printk(KERN_ERR "PC/Xx: Insufficient parms specified\n");
+ return;
+ }
+
+ /* I should REALLY validate the stuff here */
+
+ /* Copies our local copy of board into boards */
+ memcpy((void *)&boards[num_cards],(void *)&board, sizeof(board));
+
+
+ /* Does this get called once per lilo arg are what ? */
+
+ printk(KERN_INFO "PC/Xx: Added board %i, %s %i ports at 0x%4.4X base 0x%6.6X\n",
+ num_cards, board_desc[board.type],
+ board.numports, (int)board.port, (unsigned int) board.membase);
+
+ num_cards++;
+
+} /* End epca_setup */
+
+
+
+#ifdef ENABLE_PCI
+/* --------------------- Begin get_PCI_configuration ---------------------- */
+
+int get_PCI_configuration(char bus, char device_fn,
+ unsigned int *base_addr0, unsigned int *base_addr1,
+ unsigned int *base_addr2, unsigned int *base_addr3,
+ unsigned int *base_addr4, unsigned int *base_addr5)
+{ /* Begin get_PCI_configuration */
+
+ int error;
+
+ error = pcibios_read_config_dword(bus, device_fn, PCI_BASE_ADDRESS_0,
+ base_addr0);
+
+ error |= pcibios_read_config_dword(bus, device_fn, PCI_BASE_ADDRESS_1,
+ base_addr1);
+
+ error |= pcibios_read_config_dword(bus, device_fn, PCI_BASE_ADDRESS_2,
+ base_addr2);
+
+ error |= pcibios_read_config_dword(bus, device_fn, PCI_BASE_ADDRESS_3,
+ base_addr3);
+
+ error |= pcibios_read_config_dword(bus, device_fn, PCI_BASE_ADDRESS_4,
+ base_addr4);
+
+ error |= pcibios_read_config_dword(bus, device_fn, PCI_BASE_ADDRESS_5,
+ base_addr5);
+
+ /* ------------------------------------------------------------------------
+ NOTE - The code below mask out either the 2 or 4 bits dependant on the
+ space being addressed. (base_addr value reflecting io space, have their
+ first 2 bits mask out, while base_addr value reflecting mem space, have
+ their first 4 bits mask out.) These bits are flag bits and should always
+ be 0 when used as an address.
+ ---------------------------------------------------------------------------- */
+
+ if ((*base_addr0) & PCI_BASE_ADDRESS_SPACE_IO) /* Is this an io address ? */
+ (*base_addr0) &= PCI_BASE_ADDRESS_IO_MASK;
+ else
+ (*base_addr0) &= PCI_BASE_ADDRESS_MEM_MASK;
+
+ if ((*base_addr1) & PCI_BASE_ADDRESS_SPACE_IO) /* Is this an io address ? */
+ (*base_addr1) &= PCI_BASE_ADDRESS_IO_MASK;
+ else
+ (*base_addr1) &= PCI_BASE_ADDRESS_MEM_MASK;
+
+ if ((*base_addr2) & PCI_BASE_ADDRESS_SPACE_IO) /* Is this an io address ? */
+ (*base_addr2) &= PCI_BASE_ADDRESS_IO_MASK;
+ else
+ (*base_addr2) &= PCI_BASE_ADDRESS_MEM_MASK;
+
+ if ((*base_addr3) & PCI_BASE_ADDRESS_SPACE_IO) /* Is this an io address ? */
+ (*base_addr3) &= PCI_BASE_ADDRESS_IO_MASK;
+ else
+ (*base_addr3) &= PCI_BASE_ADDRESS_MEM_MASK;
+
+ if ((*base_addr4) & PCI_BASE_ADDRESS_SPACE_IO) /* Is this an io address ? */
+ (*base_addr4) &= PCI_BASE_ADDRESS_IO_MASK;
+ else
+ (*base_addr4) &= PCI_BASE_ADDRESS_MEM_MASK;
+
+ if ((*base_addr5) & PCI_BASE_ADDRESS_SPACE_IO) /* Is this an io address ? */
+ (*base_addr5) &= PCI_BASE_ADDRESS_IO_MASK;
+ else
+ (*base_addr5) &= PCI_BASE_ADDRESS_MEM_MASK;
+
+ if (error)
+ {
+ printk(KERN_ERR "<Error> - DIGI PCI error: board not initializing due to error\n");
+ return(0);
+ }
+ return(1);
+} /* End get_PCI_configuration */
+
+/* ------------------------ Begin init_PCI --------------------------- */
+
+int init_PCI(int boards_found)
+{ /* Begin init_PCI */
+
+ unsigned char bus, device_fn;
+ int i, pci_count = 0;
+ unsigned int base_addr0, base_addr1, base_addr2,
+ base_addr3, base_addr4, base_addr5;
+
+ base_addr0 = base_addr1 = base_addr2 = 0;
+ base_addr3 = base_addr4 = base_addr5 = 0;
+
+ for(i = 0; i < (MAXBOARDS - boards_found); i++)
+ { /* Begin for each POSSIBLE remaining board */
+
+ if (!pcibios_find_device(PCI_VENDOR_DIGI, PCI_DEVICE_XR,
+ i, &bus, &device_fn))
+ { /* Begin found XR */
+ if (get_PCI_configuration(bus, device_fn, &base_addr0, &base_addr1,
+ &base_addr2, &base_addr3,
+ &base_addr4, &base_addr5))
+ { /* Store a PCI/XR into the boards structure */
+
+
+ boards[boards_found + pci_count].status = ENABLED;
+ boards[boards_found + pci_count].type = PCIXR;
+
+ boards[boards_found + pci_count].numports = 0x0;
+
+ boards[boards_found + pci_count].port = (unsigned char *)((char *)base_addr0 + PCI_IO_OFFSET);
+ /* Most cards use base_addr0, but some use base_addr2 */
+ boards[boards_found + pci_count].membase = (unsigned char *)base_addr0;
+
+ if (base_addr0 >= 0x100000)
+ {
+ /* ------------------------------------------------------------
+ Standard physical addresses are valid to the kernel as long
+ as they aren't above RAM. Higher addresses (Such as are
+ typical of a PCI system) need to be mapped in with the
+ ioremap command. For boards using such high addresses the
+ driver will store both addresses. One address (The physical)
+ will be held for the apps use (And mmap) and the other (The
+ ioremapped address) will be used in the kernel.
+
+ ---------------------------------------------------------------- */
+ boards[boards_found + pci_count].re_map_port = ioremap((base_addr0 + PCI_IO_OFFSET),0x200000);
+ boards[boards_found + pci_count].re_map_membase = ioremap(base_addr0, 0x200000);
+ }
+
+ pci_count++;
+
+ /* --------------------------------------------------------------
+ I don't know what the below does, but the hardware guys say
+ its required on everything except PLX (In this case XRJ).
+ ---------------------------------------------------------------- */
+ pcibios_write_config_byte(bus, device_fn, 0x40, 0);
+ pcibios_write_config_byte(bus, device_fn, 0x46, 0);
+
+ } /* End store a PCI/XR into the board structure */
+
+ } /* End found XR */
+
+ if (!pcibios_find_device(PCI_VENDOR_DIGI, PCI_DEVICE_XEM,
+ i, &bus, &device_fn))
+ { /* Begin found XEM */
+
+ if (get_PCI_configuration(bus, device_fn, &base_addr0, &base_addr1,
+ &base_addr2, &base_addr3,
+ &base_addr4, &base_addr5))
+ { /* Begin store a PCI/XEM into the boards structure */
+
+ boards[boards_found + pci_count].status = ENABLED;
+ boards[boards_found + pci_count].type = PCIXEM;
+
+ boards[boards_found + pci_count].numports = 0x0;
+ boards[boards_found + pci_count].port = (char *)((char *)base_addr0 + PCI_IO_OFFSET);
+ /* Most cards use base_addr0, but some use base_addr2 */
+ boards[boards_found + pci_count].membase = (unsigned char *)base_addr0;
+
+ if (base_addr0 >= 0x100000)
+ {
+ /* ------------------------------------------------------------
+ Standard physical addresses are valid to the kernel as long
+ as they aren't above RAM. Higher addresses (Such as are
+ typical of a PCI system) need to be mapped in with the
+ ioremap command. For boards using such high addresses the
+ driver will store both addresses. One address (The physical)
+ will be held for the apps use (And mmap) and the other (The
+ vremapped address) will be used in the kernel.
+
+ ---------------------------------------------------------------- */
+ boards[boards_found + pci_count].re_map_port = ioremap((base_addr0 + PCI_IO_OFFSET),0x200000);
+ boards[boards_found + pci_count].re_map_membase = ioremap(base_addr0, 0x200000);
+ }
+
+ pci_count++;
+ /* --------------------------------------------------------------
+ I don't know what the below does, but the hardware guys say
+ its required on everything except PLX (In this case XRJ).
+ ---------------------------------------------------------------- */
+ pcibios_write_config_byte(bus, device_fn, 0x40, 0);
+ pcibios_write_config_byte(bus, device_fn, 0x46, 0);
+
+ } /* End store a PCI/XEM into the boards structure */
+
+ } /* End found XEM */
+
+
+ if (!pcibios_find_device(PCI_VENDOR_DIGI, PCI_DEVICE_CX,
+ i, &bus, &device_fn))
+ { /* Begin found CX */
+
+ if (get_PCI_configuration(bus, device_fn, &base_addr0, &base_addr1,
+ &base_addr2, &base_addr3,
+ &base_addr4, &base_addr5))
+ { /* Begin store a PCI/CX into the boards structure */
+
+ boards[boards_found + pci_count].status = ENABLED;
+ boards[boards_found + pci_count].type = PCICX;
+
+ boards[boards_found + pci_count].numports = 0x0;
+ boards[boards_found + pci_count].port = (char *)((char *)base_addr0 + PCI_IO_OFFSET);
+ /* Most cards use base_addr0, but some use base_addr2 */
+ boards[boards_found + pci_count].membase = (unsigned char *)base_addr0;
+
+ if (base_addr0 >= 0x100000)
+ {
+ /* ------------------------------------------------------------
+ Standard physical addresses are valid to the kernel as long
+ as they aren't above RAM. Higher addresses (Such as are
+ typical of a PCI system) need to be mapped in with the
+ ioremap command. For boards using such high addresses the
+ driver will store both addresses. One address (The physical)
+ will be held for the apps use (And mmap) and the other (The
+ vremapped address) will be used in the kernel.
+
+ ---------------------------------------------------------------- */
+ boards[boards_found + pci_count].re_map_port = ioremap((base_addr0 + PCI_IO_OFFSET),0x200000);
+ boards[boards_found + pci_count].re_map_membase = ioremap(base_addr0, 0x200000);
+ }
+
+ pci_count++;
+ /* --------------------------------------------------------------
+ I don't know what the below does, but the hardware guys say
+ its required on everything except PLX (In this case XRJ).
+ ---------------------------------------------------------------- */
+ pcibios_write_config_byte(bus, device_fn, 0x40, 0);
+ pcibios_write_config_byte(bus, device_fn, 0x46, 0);
+
+ } /* End store a PCI/CX into the boards structure */
+
+ } /* End found CX */
+
+ if (!pcibios_find_device(PCI_VENDOR_DIGI, PCI_DEVICE_XRJ,
+ i, &bus, &device_fn))
+ { /* Begin found XRJ */
+
+ if (get_PCI_configuration(bus, device_fn, &base_addr0, &base_addr1,
+ &base_addr2, &base_addr3,
+ &base_addr4, &base_addr5))
+ { /* Begin store a PCI/XRJ into the boards structure */
+
+ boards[boards_found + pci_count].status = ENABLED;
+ boards[boards_found + pci_count].type = PCIXRJ;
+
+ boards[boards_found + pci_count].numports = 0x0;
+ boards[boards_found + pci_count].port = (unsigned char *)(base_addr2 + PCI_IO_OFFSET);
+ /* Most cards use base_addr0, but some use base_addr2 */
+ boards[boards_found + pci_count].membase = (unsigned char *)base_addr2;
+
+ if (base_addr2 >= 0x100000)
+ {
+ /* ------------------------------------------------------------
+ Standard physical addresses are valid to the kernel as long
+ as they aren't above RAM. Higher addresses (Such as are
+ typical of a PCI system) need to be mapped in with the
+ ioremap command. For boards using such high addresses the
+ driver will store both addresses. One address (The physical)
+ will be held for the apps use (And mmap) and the other (The
+ vremapped address) will be used in the kernel.
+
+ ---------------------------------------------------------------- */
+ boards[boards_found + pci_count].re_map_port = ioremap((base_addr2 + PCI_IO_OFFSET),0x200000);
+ boards[boards_found + pci_count].re_map_membase = ioremap(base_addr2, 0x200000);
+ }
+
+ pci_count++;
+
+ } /* End store a PCI/XRJ into the boards structure */
+
+ } /* End found XRJ */
+
+ } /* End for each POSSIBLE remaining board */
+
+ return(pci_count);
+
+} /* End init_PCI */
+
+#endif /* ENABLE_PCI */
+
+
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov