/*
-
-
Copyright (C) 1996 Digi International.
-
+
For technical support please email digiLinux@dgii.com or
call Digi tech support at (612) 912-3456
** This driver is no longer supported by Digi **
- 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*/
+ 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*/
#include <linux/module.h>
#include <linux/kernel.h>
#include "epca.h"
#include "epcaconfig.h"
-/* ---------------------- Begin defines ------------------------ */
-
#define VERSION "1.3.0.1-LK2.6"
/* This major needs to be submitted to Linux to join the majors list */
-
-#define DIGIINFOMAJOR 35 /* For Digi specific ioctl */
+#define DIGIINFOMAJOR 35 /* For Digi specific ioctl */
#define MAXCARDS 7
#define PFX "epca: "
-/* ----------------- Begin global definitions ------------------- */
-
static int nbdevs, num_cards, liloconfig;
static int digi_poller_inhibited = 1 ;
static int setup_error_code;
static int invalid_lilo_config;
-/* The ISA boards do window flipping into the same spaces so its only sane
- with a single lock. It's still pretty efficient */
-
+/*
+ * The ISA boards do window flipping into the same spaces so its only sane with
+ * a single lock. It's still pretty efficient.
+ */
static DEFINE_SPINLOCK(epca_lock);
-/* -----------------------------------------------------------------------
- MAXBOARDS is typically 12, but ISA and EISA cards are restricted to
- 7 below.
---------------------------------------------------------------------------*/
+/* MAXBOARDS is typically 12, but ISA and EISA cards are restricted to 7 below. */
static struct board_info boards[MAXBOARDS];
-
-/* ------------- Begin structures used for driver registeration ---------- */
-
static struct tty_driver *pc_driver;
static struct tty_driver *pc_info;
/* ------------------ 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.
--------------------------------------------------------------------------- */
-
+/*
+ * 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.
--------------------------------------------------------------------------- */
+/*
+ * 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];
static struct timer_list epca_timer;
-/* ---------------------- Begin function prototypes --------------------- */
-
-/* ----------------------------------------------------------------------
- Begin generic memory functions. These functions will be alias
- (point at) more specific functions dependent on the board being
- configured.
------------------------------------------------------------------------ */
-
+/*
+ * Begin generic memory functions. These functions will be alias (point at)
+ * more specific functions dependent on the board being configured.
+ */
static void memwinon(struct board_info *b, unsigned int win);
static void memwinoff(struct board_info *b, unsigned int win);
static void globalwinon(struct channel *ch);
static void dummy_assertgwinon(struct channel *ch);
static void dummy_assertmemoff(struct channel *ch);
-/* ------------------- Begin declare functions ----------------------- */
-
static struct channel *verifyChannel(struct tty_struct *);
static void pc_sched_event(struct channel *, int);
static void epca_error(int, char *);
static int pc_init(void);
static int init_PCI(void);
-
-/* ------------------------------------------------------------------
- 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.
--------------------------------------------------------------------- */
-
+/*
+ * 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 void memwinon(struct board_info *b, unsigned int win)
{
- (b->memwinon)(b, win);
+ b->memwinon(b, win);
}
static void memwinoff(struct board_info *b, unsigned int win)
{
- (b->memwinoff)(b, win);
+ b->memwinoff(b, win);
}
static void globalwinon(struct channel *ch)
{
- (ch->board->globalwinon)(ch);
+ ch->board->globalwinon(ch);
}
static void rxwinon(struct channel *ch)
{
- (ch->board->rxwinon)(ch);
+ ch->board->rxwinon(ch);
}
static void txwinon(struct channel *ch)
{
- (ch->board->txwinon)(ch);
+ ch->board->txwinon(ch);
}
static void memoff(struct channel *ch)
{
- (ch->board->memoff)(ch);
+ ch->board->memoff(ch);
}
static void assertgwinon(struct channel *ch)
{
- (ch->board->assertgwinon)(ch);
+ ch->board->assertgwinon(ch);
}
static void assertmemoff(struct channel *ch)
{
- (ch->board->assertmemoff)(ch);
+ ch->board->assertmemoff(ch);
}
-/* ---------------------------------------------------------
- PCXEM windowing is the same as that used in the PCXR
- and CX series cards.
------------------------------------------------------------- */
-
+/* PCXEM windowing is the same as that used in the PCXR and CX series cards. */
static void pcxem_memwinon(struct board_info *b, unsigned int win)
{
outb_p(FEPWIN|win, b->port + 1);
}
/* ----------------- Begin pcxe memory window stuff ------------------ */
-
static void pcxe_memwinon(struct board_info *b, unsigned int win)
{
- outb_p(FEPWIN | win, b->port + 1);
+ outb_p(FEPWIN | win, b->port + 1);
}
static void pcxe_memwinoff(struct board_info *b, unsigned int win)
{
- outb_p(inb(b->port) & ~FEPMEM,
- b->port + 1);
+ outb_p(inb(b->port) & ~FEPMEM, b->port + 1);
outb_p(0, b->port + 1);
}
static void pcxe_globalwinon(struct channel *ch)
{
- outb_p( FEPWIN, (int)ch->board->port + 1);
+ outb_p(FEPWIN, (int)ch->board->port + 1);
}
static void pcxe_rxwinon(struct channel *ch)
{
- outb_p(ch->rxwin, (int)ch->board->port + 1);
+ outb_p(ch->rxwin, (int)ch->board->port + 1);
}
static void pcxe_txwinon(struct channel *ch)
{
- outb_p(ch->txwin, (int)ch->board->port + 1);
+ outb_p(ch->txwin, (int)ch->board->port + 1);
}
static void pcxe_memoff(struct channel *ch)
}
/* ------------- Begin pc64xe and pcxi memory window stuff -------------- */
-
static void pcxi_memwinon(struct board_info *b, unsigned int win)
{
- outb_p(inb(b->port) | FEPMEM, b->port);
+ outb_p(inb(b->port) | FEPMEM, b->port);
}
static void pcxi_memwinoff(struct board_info *b, unsigned int win)
static void pcxi_rxwinon(struct channel *ch)
{
- outb_p(FEPMEM, ch->board->port);
+ outb_p(FEPMEM, ch->board->port);
}
static void pcxi_txwinon(struct channel *ch)
{
- outb_p(FEPMEM, ch->board->port);
+ outb_p(FEPMEM, ch->board->port);
}
static void pcxi_memoff(struct channel *ch)
epcaassert(!(inb(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, dependent on the card the routine
- may or may not do anything.
----------------------------------------------------------------------------*/
-
+/*
+ * 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, dependent on the card the routine may or may not do anything.
+ */
static void dummy_memwinon(struct board_info *b, unsigned int win)
{
}
{
}
-/* ----------------- Begin verifyChannel function ----------------------- */
static struct channel *verifyChannel(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.
- --------------------------------------------------------------------- */
+{
+ /*
+ * 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) {
struct channel *ch = (struct channel *)tty->driver_data;
if ((ch >= &digi_channels[0]) && (ch < &digi_channels[nbdevs])) {
}
}
return NULL;
-
-} /* End verifyChannel */
-
-/* ------------------ Begin pc_sched_event ------------------------- */
+}
static void pc_sched_event(struct channel *ch, int event)
{
- /* ----------------------------------------------------------------------
- We call this to schedule interrupt processing on some event. The
- kernel sees our request and calls the related routine in OUR driver.
- -------------------------------------------------------------------------*/
+ /*
+ * 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;
schedule_work(&ch->tqueue);
-} /* End pc_sched_event */
-
-/* ------------------ Begin epca_error ------------------------- */
+}
static void epca_error(int line, char *msg)
{
printk(KERN_ERR "epca_error (Digi): line = %d %s\n",line,msg);
}
-/* ------------------ Begin pc_close ------------------------- */
-static void pc_close(struct tty_struct * tty, struct file * filp)
+static void pc_close(struct tty_struct *tty, struct file *filp)
{
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 ch != NULL */
+ /*
+ * verifyChannel returns the channel from the tty struct if it is
+ * valid. This serves as a sanity check.
+ */
+ if ((ch = verifyChannel(tty)) != NULL) {
spin_lock_irqsave(&epca_lock, flags);
if (tty_hung_up_p(filp)) {
spin_unlock_irqrestore(&epca_lock, 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.
- ---------------------------------------------------------------- */
+ /*
+ * Return without doing anything. Someone might still
+ * be using the channel.
+ */
spin_unlock_irqrestore(&epca_lock, flags);
return;
- } /* End channel is open more than once */
+ }
/* Port open only once go ahead with shutdown & reset */
BUG_ON(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.
- ------------------------------------------------------------------ */
+ /*
+ * 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;
tty->closing = 1;
if (ch->asyncflags & ASYNC_INITIALIZED) {
/* Setup an event to indicate when the transmit buffer empties */
- setup_empty_event(tty, ch);
+ setup_empty_event(tty, ch);
tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
}
if (tty->driver->flush_buffer)
ch->tty = NULL;
spin_unlock_irqrestore(&epca_lock, flags);
- if (ch->blocked_open) { /* Begin if blocked_open */
- if (ch->close_delay)
+ if (ch->blocked_open) {
+ if (ch->close_delay)
msleep_interruptible(jiffies_to_msecs(ch->close_delay));
wake_up_interruptible(&ch->open_wait);
- } /* End if blocked_open */
- ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED |
+ }
+ ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED |
ASYNC_CLOSING);
wake_up_interruptible(&ch->close_wait);
- } /* End if ch != NULL */
-} /* End pc_close */
-
-/* ------------------ Begin shutdown ------------------------- */
+ }
+}
static void shutdown(struct channel *ch)
-{ /* Begin shutdown */
-
+{
unsigned long flags;
struct tty_struct *tty;
struct board_chan __iomem *bc;
- if (!(ch->asyncflags & ASYNC_INITIALIZED))
+ if (!(ch->asyncflags & ASYNC_INITIALIZED))
return;
spin_lock_irqsave(&epca_lock, flags);
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.
- --------------------------------------------------------------------- */
-
+ /*
+ * 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)
writeb(0, &bc->idata);
tty = ch->tty;
- /* ----------------------------------------------------------------
- If we're a modem control device and HUPCL is on, drop RTS & DTR.
- ------------------------------------------------------------------ */
-
+ /* 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.
- ---------------------------------------------------------------------- */
-
+ /*
+ * 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;
spin_unlock_irqrestore(&epca_lock, 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 */
+ /*
+ * 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;
if (tty->driver->flush_buffer)
ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED);
spin_unlock_irqrestore(&epca_lock, flags);
wake_up_interruptible(&ch->open_wait);
- } /* End if ch != NULL */
-
-} /* End pc_hangup */
-
-/* ------------------ Begin pc_write ------------------------- */
+ }
+}
-static int pc_write(struct tty_struct * tty,
+static int pc_write(struct tty_struct *tty,
const unsigned char *buf, int bytesAvailable)
-{ /* Begin pc_write */
+{
unsigned int head, tail;
int dataLen;
int size;
int remain;
struct board_chan __iomem *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.
- ------------------------------------------------------------------- */
-
- /* ---------------------------------------------------------
- verifyChannel returns the channel from the tty struct
- if it is valid. This serves as a sanity check.
- ------------------------------------------------------------- */
+ /*
+ * 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.
+ */
+ /*
+ * 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;
amountCopied = 0;
tail = readw(&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.
- ------------------------------------------------------------------ */
+ if (head >= tail) {
+ /* 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;
- } else { /* Begin head has wrapped around */
-
+ } else {
+ /* 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.
- ---------------------------------------------------------------------- */
+ }
+ /*
+ * 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.
- ------------------------------------------------------------------- */
+ while (bytesAvailable > 0) {
+ /* 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_toio(ch->txptr + head, buf, dataLen);
buf += dataLen;
head = 0;
dataLen = tail;
}
- } /* End while there is data to copy onto card */
+ }
ch->statusflags |= TXBUSY;
globalwinon(ch);
writew(head, &bc->tin);
}
memoff(ch);
spin_unlock_irqrestore(&epca_lock, flags);
- return(amountCopied);
-
-} /* End pc_write */
-
-/* ------------------ Begin pc_put_char ------------------------- */
+ return amountCopied;
+}
static void pc_put_char(struct tty_struct *tty, unsigned char c)
-{ /* Begin pc_put_char */
+{
pc_write(tty, &c, 1);
-} /* 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;
remain = 0;
- /* ---------------------------------------------------------
- verifyChannel returns the channel from the tty struct
- if it is valid. This serves as a sanity check.
- ------------------------------------------------------------- */
-
+ /*
+ * verifyChannel returns the channel from the tty struct if it is
+ * valid. This serves as a sanity check.
+ */
if ((ch = verifyChannel(tty)) != NULL) {
spin_lock_irqsave(&epca_lock, flags);
globalwinon(ch);
}
/* 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;
struct channel *ch;
struct board_chan __iomem *bc;
- /* ---------------------------------------------------------
- verifyChannel returns the channel from the tty struct
- if it is valid. This serves as a sanity check.
- ------------------------------------------------------------- */
-
+ /*
+ * 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);
+ return 0;
spin_lock_irqsave(&epca_lock, flags);
globalwinon(ch);
else { /* Begin if some space on the card has been used */
head = readw(&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.
- ------------------------------------------------------------------- */
+ /*
+ * 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
- ----------------------------------------------------------------- */
+ /*
+ * 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);
spin_unlock_irqrestore(&epca_lock, flags);
/* Return number of characters residing on card. */
- return(chars);
-
-} /* End pc_chars_in_buffer */
-
-/* ------------------ Begin pc_flush_buffer ---------------------- */
+ return chars;
+}
static void pc_flush_buffer(struct tty_struct *tty)
-{ /* Begin pc_flush_buffer */
-
+{
unsigned int tail;
unsigned long flags;
struct channel *ch;
struct board_chan __iomem *bc;
- /* ---------------------------------------------------------
- verifyChannel returns the channel from the tty struct
- if it is valid. This serves as a sanity check.
- ------------------------------------------------------------- */
+ /*
+ * verifyChannel returns the channel from the tty struct if it is
+ * valid. This serves as a sanity check.
+ */
if ((ch = verifyChannel(tty)) == NULL)
return;
memoff(ch);
spin_unlock_irqrestore(&epca_lock, flags);
tty_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.
- ------------------------------------------------------------- */
+{
+ 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;
spin_lock_irqsave(&epca_lock, flags);
- /* ----------------------------------------------------------------
- If not already set and the transmitter is busy setup an event
- to indicate when the transmit empties.
- ------------------------------------------------------------------- */
+ /*
+ * 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);
spin_unlock_irqrestore(&epca_lock, flags);
}
-} /* End pc_flush_chars */
-
-/* ------------------ Begin block_til_ready ---------------------- */
+}
-static int block_til_ready(struct tty_struct *tty,
+static int block_til_ready(struct tty_struct *tty,
struct file *filp, struct channel *ch)
-{ /* Begin block_til_ready */
+{
DECLARE_WAITQUEUE(wait,current);
- int retval, do_clocal = 0;
+ 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);
+ 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 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 (filp->f_flags & O_NONBLOCK) {
- /* -----------------------------------------------------------------
- If non-blocking mode is set, then make the check up front
- and then exit.
- -------------------------------------------------------------------- */
+ /*
+ * If non-blocking mode is set, then make the check up front
+ * and then exit.
+ */
ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
return 0;
}
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);
if (!tty_hung_up_p(filp))
ch->count--;
ch->blocked_open++;
- while(1)
- { /* Begin forever while */
+ while (1) {
set_current_state(TASK_INTERRUPTIBLE);
if (tty_hung_up_p(filp) ||
- !(ch->asyncflags & ASYNC_INITIALIZED))
+ !(ch->asyncflags & ASYNC_INITIALIZED))
{
if (ch->asyncflags & ASYNC_HUP_NOTIFY)
retval = -EAGAIN;
else
- retval = -ERESTARTSYS;
+ retval = -ERESTARTSYS;
break;
}
- if (!(ch->asyncflags & ASYNC_CLOSING) &&
+ if (!(ch->asyncflags & ASYNC_CLOSING) &&
(do_clocal || (ch->imodem & ch->dcd)))
break;
if (signal_pending(current)) {
break;
}
spin_unlock_irqrestore(&epca_lock, flags);
- /* ---------------------------------------------------------------
- Allow someone else to be scheduled. We will occasionally 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.
- ------------------------------------------------------------------ */
+ /*
+ * Allow someone else to be scheduled. We will occasionally 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();
spin_lock_irqsave(&epca_lock, flags);
-
- } /* End forever while */
+ }
__set_current_state(TASK_RUNNING);
remove_wait_queue(&ch->open_wait, &wait);
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;
/* 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.
- ---------------------------------------------------------------------- */
-
+ /*
+ * 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 "epca: pc_open: Invalid board type specified in kernel options.\n");
tty->driver_data = NULL; /* Mark this device as 'down' */
return(-ENODEV);
}
-
+
if ((bc = ch->brdchan) == 0) {
tty->driver_data = NULL;
return -ENODEV;
}
spin_lock_irqsave(&epca_lock, flags);
- /* ------------------------------------------------------------------
- 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.
- --------------------------------------------------------------------- */
+ /*
+ * 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.
- ------------------------------------------------------------------ */
+ /*
+ * 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.
- -------------------------------------------------------------------- */
+ /*
+ * If this is the first time the channel has been opened, initialize
+ * the tty->termios struct otherwise let pc_close handle it.
+ */
globalwinon(ch);
ch->statusflags = 0;
/* Save boards current modem status */
ch->imodem = readb(&bc->mstat);
- /* ----------------------------------------------------------------
- Set receive head and tail ptrs to each other. This indicates
- no data available to read.
- ----------------------------------------------------------------- */
+ /*
+ * Set receive head and tail ptrs to each other. This indicates no data
+ * available to read.
+ */
head = readw(&bc->rin);
writew(head, &bc->rout);
/* 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.
- -------------------------------------------------------------------- */
+ /*
+ * 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);
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...
- --------------------------------------------------------------- */
+ /*
+ * Set this again in case a hangup set it to zero while this open() was
+ * waiting for the line...
+ */
spin_lock_irqsave(&epca_lock, flags);
ch->tty = tty;
globalwinon(ch);
memoff(ch);
spin_unlock_irqrestore(&epca_lock, flags);
return 0;
-} /* End pc_open */
+}
static int __init epca_module_init(void)
-{ /* Begin init_module */
+{
return pc_init();
}
-
module_init(epca_module_init);
static struct pci_driver epca_driver;
del_timer_sync(&epca_timer);
- if ((tty_unregister_driver(pc_driver)) ||
- (tty_unregister_driver(pc_info)))
+ if (tty_unregister_driver(pc_driver) || tty_unregister_driver(pc_info))
{
printk(KERN_WARNING "epca: cleanup_module failed to un-register tty driver\n");
return;
put_tty_driver(pc_driver);
put_tty_driver(pc_info);
- for (crd = 0; crd < num_cards; crd++) { /* Begin for each card */
+ for (crd = 0; crd < num_cards; crd++) {
bd = &boards[crd];
- if (!bd)
- { /* Begin sanity check */
+ if (!bd) { /* 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 */
+ for (count = 0; count < bd->numports; count++, ch++) {
if (ch && ch->tty)
tty_hangup(ch->tty);
- } /* End for each port */
- } /* End for each card */
- pci_unregister_driver (&epca_driver);
+ }
+ }
+ pci_unregister_driver(&epca_driver);
}
-
module_exit(epca_module_exit);
static const struct tty_operations pc_ops = {
.ioctl = info_ioctl,
};
-/* ------------------ Begin pc_init ---------------------- */
-
static int __init pc_init(void)
-{ /* Begin pc_init */
+{
int crd;
struct board_info *bd;
unsigned char board_id = 0;
if (!pc_info)
goto out2;
- /* -----------------------------------------------------------------------
- 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 */
-
+ /*
+ * 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) {
+ /* 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.
- --------------------------------------------------------------- */
+ memcpy(&boards, &static_boards,
+ sizeof(struct board_info) * NUMCARDS);
+ }
+ /*
+ * 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);
- /* ------------------------------------------------------------------
- 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 beginning
- 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.)
-
- --------------------------------------------------------------------- */
-
+ /*
+ * 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
+ * beginning 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 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(num_cards < MAXBOARDS)
+ if (num_cards < MAXBOARDS)
pci_boards_found += init_PCI();
num_cards += pci_boards_found;
pc_driver->owner = THIS_MODULE;
- pc_driver->name = "ttyD";
- pc_driver->major = DIGI_MAJOR;
+ pc_driver->name = "ttyD";
+ pc_driver->major = DIGI_MAJOR;
pc_driver->minor_start = 0;
pc_driver->type = TTY_DRIVER_TYPE_SERIAL;
pc_driver->subtype = SERIAL_TYPE_NORMAL;
tty_set_operations(pc_info, &info_ops);
- 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.
- ---------------------------------------------------------------------- */
+ for (crd = 0; crd < num_cards; crd++) {
+ /*
+ * 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;
+ switch (bd->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 PCXI:
- board_id = inb((int)bd->port);
- if ((board_id & 0x1) == 0x1)
- { /* Begin it's 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;
+ 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;
- /* Is is a 256K board */
- if ((board_id & 0x30) == 0x20)
- bd->memory_seg = 0xc000;
+ 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;
- /* Is it a 512K board */
- if ((board_id & 0x30) == 0x30)
- bd->memory_seg = 0x8000;
+ 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;
- } else printk(KERN_ERR "epca: Board at 0x%x doesn't appear to be an XI\n",(int)bd->port);
+ 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) {
+ case PCXE:
+ case PCXEVE:
+ case PC64XE:
+ bd->memory_seg = 0xf000;
+ break;
- } /* End for each card */
+ case PCXI:
+ board_id = inb((int)bd->port);
+ if ((board_id & 0x1) == 0x1) {
+ /* it's 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;
+ } else
+ printk(KERN_ERR "epca: Board at 0x%x doesn't appear to be an XI\n",(int)bd->port);
+ break;
+ }
+ }
err = tty_register_driver(pc_driver);
if (err) {
goto out4;
}
- /* -------------------------------------------------------------------
- Start up the poller to check for events on all enabled boards
- ---------------------------------------------------------------------- */
-
+ /* Start up the poller to check for events on all enabled boards */
init_timer(&epca_timer);
epca_timer.function = epcapoll;
mod_timer(&epca_timer, jiffies + HZ/25);
put_tty_driver(pc_driver);
out1:
return err;
-
-} /* End pc_init */
-
-/* ------------------ Begin post_fep_init ---------------------- */
+}
static void post_fep_init(unsigned int crd)
-{ /* Begin post_fep_init */
-
+{
int i;
void __iomem *memaddr;
struct global_data __iomem *gd;
struct board_info *bd;
struct board_chan __iomem *bc;
- struct channel *ch;
- int shrinkmem = 0, lowwater ;
-
- /* -------------------------------------------------------------
- This call is made by the user via. the ioctl call DIGI_INIT.
- It is responsible for setting up all the card specific stuff.
- ---------------------------------------------------------------- */
- bd = &boards[crd];
+ struct channel *ch;
+ int shrinkmem = 0, lowwater;
- /* -----------------------------------------------------------------
- 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.
- ------------------------------------------------------------------- */
+ /*
+ * This call is made by the user via. the ioctl call DIGI_INIT. It is
+ * responsible 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) { /* 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)).
- ------------------------------------------------------------------------ */
+ /*
+ * 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)).
+ */
/* PCI cards are already remapped at this point ISA are not */
bd->numports = readw(bd->re_map_membase + XEMPORTS);
epcaassert(bd->numports <= 64,"PCI returned a invalid number of ports");
memaddr = bd->re_map_membase;
- /* -----------------------------------------------------------------
- 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.
- -------------------------------------------------------------------- */
-
+ /*
+ * 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 = 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.
- ---------------------------------------------------------------------- */
-
+ /*
+ * 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 = memaddr + GLOBAL;
- /* --------------------------------------------------------------------
- XEPORTS (address 0xc22) points at the number of channels the
- card supports. (For 64XE, XI, XEM, and XR use 0xc02)
- ----------------------------------------------------------------------- */
-
+ /*
+ * 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) && (readw(memaddr + XEPORTS) < 3))
shrinkmem = 1;
if (bd->type < PCIXEM)
if (!request_region((int)bd->port, 4, board_desc[bd->type]))
- return;
+ return;
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 */
+ /*
+ * Remember ch is the main drivers channels structure, while bc is the
+ * cards channel structure.
+ */
+ for (i = 0; i < bd->numports; i++, ch++, bc++) {
unsigned long flags;
u16 tseg, rseg;
- ch->brdchan = bc;
- ch->mailbox = gd;
+ ch->brdchan = bc;
+ ch->mailbox = gd;
INIT_WORK(&ch->tqueue, do_softint);
- ch->board = &boards[crd];
+ ch->board = &boards[crd];
spin_lock_irqsave(&epca_lock, flags);
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 */
+ /*
+ * 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;
+ }
if (boards[crd].altpin) {
ch->dsr = ch->m_dcd;
ch->dcd = ch->m_dsr;
ch->digiext.digi_flags |= DIGI_ALTPIN;
- }
- else {
+ } else {
ch->dcd = ch->m_dcd;
ch->dsr = ch->m_dsr;
}
-
+
ch->boardnum = crd;
ch->channelnum = i;
ch->magic = EPCA_MAGIC;
rseg = readw(&bc->rseg);
switch (bd->type) {
+ case PCIXEM:
+ case PCIXRJ:
+ case PCIXR:
+ /* Cover all the 2MEG cards */
+ ch->txptr = memaddr + ((tseg << 4) & 0x1fffff);
+ ch->rxptr = memaddr + ((rseg << 4) & 0x1fffff);
+ ch->txwin = FEPWIN | (tseg >> 11);
+ ch->rxwin = FEPWIN | (rseg >> 11);
+ break;
+
+ case PCXEM:
+ case EISAXEM:
+ /* Cover all the 32K windowed cards */
+ /* Mask equal to window size - 1 */
+ ch->txptr = memaddr + ((tseg << 4) & 0x7fff);
+ ch->rxptr = memaddr + ((rseg << 4) & 0x7fff);
+ ch->txwin = FEPWIN | (tseg >> 11);
+ ch->rxwin = FEPWIN | (rseg >> 11);
+ break;
- case PCIXEM:
- case PCIXRJ:
- case PCIXR:
- /* Cover all the 2MEG cards */
- ch->txptr = memaddr + ((tseg << 4) & 0x1fffff);
- ch->rxptr = memaddr + ((rseg << 4) & 0x1fffff);
- ch->txwin = FEPWIN | (tseg >> 11);
- ch->rxwin = FEPWIN | (rseg >> 11);
- break;
-
- case PCXEM:
- case EISAXEM:
- /* Cover all the 32K windowed cards */
- /* Mask equal to window size - 1 */
- ch->txptr = memaddr + ((tseg << 4) & 0x7fff);
- ch->rxptr = memaddr + ((rseg << 4) & 0x7fff);
- ch->txwin = FEPWIN | (tseg >> 11);
- ch->rxwin = FEPWIN | (rseg >> 11);
- break;
-
- case PCXEVE:
- case PCXE:
- ch->txptr = memaddr + (((tseg - bd->memory_seg) << 4) & 0x1fff);
- ch->txwin = FEPWIN | ((tseg - bd->memory_seg) >> 9);
- ch->rxptr = memaddr + (((rseg - bd->memory_seg) << 4) & 0x1fff);
- ch->rxwin = FEPWIN | ((rseg - bd->memory_seg) >>9 );
- break;
-
- case PCXI:
- case PC64XE:
- ch->txptr = memaddr + ((tseg - bd->memory_seg) << 4);
- ch->rxptr = memaddr + ((rseg - bd->memory_seg) << 4);
- ch->txwin = ch->rxwin = 0;
- break;
-
- } /* End switch bd->type */
+ case PCXEVE:
+ case PCXE:
+ ch->txptr = memaddr + (((tseg - bd->memory_seg) << 4) & 0x1fff);
+ ch->txwin = FEPWIN | ((tseg - bd->memory_seg) >> 9);
+ ch->rxptr = memaddr + (((rseg - bd->memory_seg) << 4) & 0x1fff);
+ ch->rxwin = FEPWIN | ((rseg - bd->memory_seg) >>9 );
+ break;
+
+ case PCXI:
+ case PC64XE:
+ ch->txptr = memaddr + ((tseg - bd->memory_seg) << 4);
+ ch->rxptr = memaddr + ((rseg - bd->memory_seg) << 4);
+ ch->txwin = ch->rxwin = 0;
+ break;
+ }
ch->txbufhead = 0;
ch->txbufsize = readw(&bc->tmax) + 1;
-
+
ch->rxbufhead = 0;
ch->rxbufsize = readw(&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);
writew(100, &bc->edelay);
writeb(1, &bc->idata);
-
+
ch->startc = readb(&bc->startc);
ch->stopc = readb(&bc->stopc);
ch->startca = readb(&bc->startca);
ch->stopca = readb(&bc->stopca);
-
+
ch->fepcflag = 0;
ch->fepiflag = 0;
ch->fepoflag = 0;
ch->fepstopc = 0;
ch->fepstartca = 0;
ch->fepstopca = 0;
-
+
ch->close_delay = 50;
ch->count = 0;
ch->blocked_open = 0;
init_waitqueue_head(&ch->close_wait);
spin_unlock_irqrestore(&epca_lock, flags);
- } /* End for each port */
+ }
- printk(KERN_INFO
- "Digi PC/Xx Driver V%s: %s I/O = 0x%lx Mem = 0x%lx Ports = %d\n",
+ 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);
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 interrupts 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.
- ----------------------------------------------------------------------- */
-
- for (crd = 0; crd < num_cards; crd++)
- { /* Begin for each card */
-
+ /*
+ * This routine is called upon every timer interrupt. Even though the
+ * Digi series cards are capable of generating interrupts 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.
+ */
+ for (crd = 0; crd < num_cards; crd++) {
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.
- ---------------------------------------------------------------- */
+ continue;
+ /*
+ * 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.
+ */
spin_lock_irqsave(&epca_lock, flags);
assertmemoff(ch);
globalwinon(ch);
- /* ---------------------------------------------------------------
- In this case head and tail actually refer to the event queue not
- the transmit or receive queue.
- ------------------------------------------------------------------- */
-
+ /*
+ * In this case head and tail actually refer to the event queue
+ * not the transmit or receive queue.
+ */
head = readw(&ch->mailbox->ein);
tail = readw(&ch->mailbox->eout);
-
- /* If head isn't equal to tail we have an event */
+ /* If head isn't equal to tail we have an event */
if (head != tail)
doevent(crd);
memoff(ch);
spin_unlock_irqrestore(&epca_lock, flags);
-
} /* End for each card */
mod_timer(&epca_timer, jiffies + (HZ / 25));
-} /* End epcapoll */
-
-/* --------------------- Begin doevent ------------------------ */
+}
static void doevent(int crd)
-{ /* Begin doevent */
-
+{
void __iomem *eventbuf;
struct channel *ch, *chan0;
static struct tty_struct *tty;
int event, channel;
int mstat, lstat;
- /* -------------------------------------------------------------------
- This subroutine is called by epcapoll when an event is detected
- in the event queue. This routine responds to those events.
- --------------------------------------------------------------------- */
+ /*
+ * 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 = readw(&chan0->mailbox->eout)) != (head = readw(&chan0->mailbox->ein)))
- { /* Begin while something in event queue */
+ while ((tail = readw(&chan0->mailbox->eout)) != (head = readw(&chan0->mailbox->ein))) { /* Begin while something in event queue */
assertgwinon(chan0);
eventbuf = bd->re_map_membase + tail + ISTART;
/* Get the channel the event occurred on */
channel = readb(eventbuf);
/* Get the actual event code that occurred */
event = readb(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.
- ------------------------------------------------------------------- */
+ /*
+ * 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 = readb(eventbuf + 2);
lstat = readb(eventbuf + 3);
assertgwinon(ch);
} /* End DATA_IND */
/* else *//* Fix for DCD transition missed bug */
- if (event & MODEMCHG_IND) { /* Begin MODEMCHG_IND */
+ if (event & MODEMCHG_IND) {
/* A modem signal change has been indicated */
ch->imodem = mstat;
- if (ch->asyncflags & ASYNC_CHECK_CD) {
+ 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 */
+ if (tty) {
+ if (event & BREAK_IND) {
/* A break has been indicated */
tty_insert_flip_char(tty, 0, TTY_BREAK);
- tty_schedule_flip(tty);
- } else if (event & LOWTX_IND) { /* Begin LOWTX_IND */
- if (ch->statusflags & LOWWAIT)
- { /* Begin if LOWWAIT */
+ tty_schedule_flip(tty);
+ } else if (event & LOWTX_IND) {
+ if (ch->statusflags & LOWWAIT) {
ch->statusflags &= ~LOWWAIT;
tty_wakeup(tty);
- } /* End if LOWWAIT */
- } else if (event & EMPTYTX_IND) { /* Begin EMPTYTX_IND */
+ }
+ } else if (event & EMPTYTX_IND) {
/* This event is generated by setup_empty_event */
ch->statusflags &= ~TXBUSY;
- if (ch->statusflags & EMPTYWAIT) { /* Begin if EMPTYWAIT */
+ if (ch->statusflags & EMPTYWAIT) {
ch->statusflags &= ~EMPTYWAIT;
tty_wakeup(tty);
- } /* End if EMPTYWAIT */
- } /* End EMPTYTX_IND */
- } /* End if valid tty */
+ }
+ }
+ }
next:
globalwinon(ch);
BUG_ON(!bc);
writew((tail + 4) & (IMAX - ISTART - 4), &chan0->mailbox->eout);
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 __iomem *memaddr;
unsigned int head, cmdTail, cmdStart, cmdMax;
long count;
head = readw(&ch->mailbox->cin);
/* cmdStart is a base address */
cmdStart = readw(&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.
- -------------------------------------------------------------------- */
+ /*
+ * 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 + readw(&ch->mailbox->cmax));
memaddr = ch->board->re_map_membase;
writew(head, &ch->mailbox->cin);
count = FEPTIMEOUT;
- for (;;) { /* Begin forever loop */
+ for (;;) {
count--;
if (count == 0) {
printk(KERN_ERR "<Error> - Fep not responding in fepcmd()\n");
head = readw(&ch->mailbox->cin);
cmdTail = readw(&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).
- ------------------------------------------------------------- */
+ /*
+ * 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 -------------------- */
+ break;
+ }
+}
+/*
+ * 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.
+ */
static unsigned termios2digi_h(struct channel *ch, unsigned cflag)
-{ /* Begin termios2digi_h */
+{
unsigned res = 0;
if (cflag & CRTSCTS) {
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 |
+{
+ 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;
- if (cflag & CBAUDEX) { /* Begin detected CBAUDEX */
+ if (cflag & CBAUDEX) {
ch->digiext.digi_flags |= DIGI_FAST;
- /* -------------------------------------------------------------
- HUPCL bit is used by FEP to indicate fast baud
- table is to be used.
- ----------------------------------------------------------------- */
+ /*
+ * 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.
- ---------------------------------------------------------------------- */
+ } 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.
- ----------------------------------------------------------------- */
+ /*
+ * 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))) ||
+ /*
+ * 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 ----------------------- */
+}
/* Caller must hold the locks */
static void epcaparam(struct tty_struct *tty, struct channel *ch)
-{ /* Begin epcaparam */
-
+{
unsigned int cmdHead;
struct ktermios *ts;
struct board_chan __iomem *bc;
writew(cmdHead, &bc->rout);
cmdHead = readw(&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.
- ----------------------------------------------------------------- */
+ /*
+ * 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;
- } else { /* Begin CBAUD not detected */
- /* -------------------------------------------------------------------
- c_cflags have changed but that change had nothing to do with BAUD.
- Propagate the change to the card.
- ---------------------------------------------------------------------- */
+ } 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 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)
ch->asyncflags &= ~ASYNC_CHECK_CD;
else
/* 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, handling of parity errors, and
- break handling are all set here.
- ------------------------------------------------------------------- */
+ /*
+ * Command sets channels iflag structure on the board. Such
+ * things as input soft flow control, handling of parity
+ * errors, and break handling are all set here.
+ */
/* break handling, parity handling, 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.
- ------------------------------------------------------------------- */
+ /*
+ * 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.
+ */
writeb(ch->dcd, &bc->mint);
if ((ts->c_cflag & CLOCAL) || (ch->digiext.digi_flags & DIGI_FORCEDCD))
if (ch->digiext.digi_flags & DIGI_FORCEDCD)
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.
- ----------------------------------------------------------------- */
+ /*
+ * 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.
- ----------------------------------------------------------------- */
+ /*
+ * 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);
if (ch->startc != ch->fepstartc || ch->stopc != ch->fepstopc) {
ch->fepstartc = ch->startc;
ch->fepstopc = ch->stopc;
- /* ------------------------------------------------------------
- The XON / XOFF characters have changed; propagate these
- changes to the card.
- --------------------------------------------------------------- */
+ /*
+ * The XON / XOFF characters have changed; propagate 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; propagate these changes to the card.
- ------------------------------------------------------------------ */
+ /*
+ * Similar to the above, this time the auxilarly XON / XOFF
+ * characters have changed; propagate these changes to the card.
+ */
fepcmd(ch, SAUXONOFFC, ch->fepstartca, ch->fepstopca, 0, 1);
}
-} /* End epcaparam */
+}
-/* --------------------- Begin receive_data ----------------------- */
/* Caller holds lock */
static void receive_data(struct channel *ch)
-{ /* Begin receive_data */
-
+{
unchar *rptr;
struct ktermios *ts = NULL;
struct tty_struct *tty;
unsigned int tail, head;
unsigned int wrapmask;
- /* ---------------------------------------------------------------
- This routine is called by doint when a receive data event
- has taken place.
- ------------------------------------------------------------------- */
-
+ /*
+ * This routine is called by doint when a receive data event has taken
+ * place.
+ */
globalwinon(ch);
if (ch->statusflags & RXSTOPPED)
return;
BUG_ON(!bc);
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.
- ------------------------------------------------------------------------ */
+ /*
+ * Get the head and tail pointers to the receiver queue. Wrap the head
+ * pointer if it has reached the end of the buffer.
+ */
head = readw(&bc->rin);
head &= wrapmask;
tail = readw(&bc->rout) & wrapmask;
if (bytesAvailable == 0)
return;
- /* ------------------------------------------------------------------
- If CREAD bit is off or device not open, set TX tail to head
- --------------------------------------------------------------------- */
-
+ /* If CREAD bit is off or device not open, set TX tail to head */
if (!tty || !ts || !(ts->c_cflag & CREAD)) {
writew(head, &bc->rout);
return;
rxwinon(ch);
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.
- ----------------------------------------------------------------- */
+ /*
+ * 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
- ----------------------------------------------------------------- */
+ /* Make sure we don't overflow the buffer */
dataToRead = tty_prepare_flip_string(tty, &rptr, dataToRead);
if (dataToRead == 0)
break;
- /* ---------------------------------------------------------------
- Move data read from our card into the line disciplines buffer
- for translation if necessary.
- ------------------------------------------------------------------ */
+ /*
+ * Move data read from our card into the line disciplines
+ * buffer for translation if necessary.
+ */
memcpy_fromio(rptr, ch->rxptr + tail, dataToRead);
tail = (tail + dataToRead) & wrapmask;
bytesAvailable -= dataToRead;
globalwinon(ch);
writew(tail, &bc->rout);
/* Must be called with global data */
- tty_schedule_flip(ch->tty);
- return;
-} /* End receive_data */
+ tty_schedule_flip(ch->tty);
+}
-static int info_ioctl(struct tty_struct *tty, struct file * file,
+static int info_ioctl(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg)
{
- switch (cmd)
- { /* Begin switch cmd */
- case DIGI_GETINFO:
- { /* Begin case DIGI_GETINFO */
- struct digi_info di ;
+ switch (cmd) {
+ case DIGI_GETINFO:
+ {
+ struct digi_info di;
int brd;
- if(get_user(brd, (unsigned int __user *)arg))
+ if (get_user(brd, (unsigned int __user *)arg))
return -EFAULT;
if (brd < 0 || brd >= num_cards || num_cards == 0)
return -ENODEV;
memset(&di, 0, sizeof(di));
- di.board = brd ;
+ di.board = brd;
di.status = boards[brd].status;
di.type = boards[brd].type ;
di.numports = boards[brd].numports ;
di.port = (unsigned char *)boards[brd].port ;
di.membase = (unsigned char *)boards[brd].membase ;
- if (copy_to_user((void __user *)arg, &di, sizeof (di)))
+ if (copy_to_user((void __user *)arg, &di, sizeof(di)))
return -EFAULT;
break;
- } /* End case DIGI_GETINFO */
-
- case DIGI_POLLER:
- { /* Begin case DIGI_POLLER */
+ }
- int brd = arg & 0xff000000 >> 16 ;
- unsigned char state = arg & 0xff ;
+ case DIGI_POLLER:
+ {
+ int brd = arg & 0xff000000 >> 16;
+ unsigned char state = arg & 0xff;
if (brd < 0 || brd >= num_cards) {
printk(KERN_ERR "epca: DIGI POLLER : brd not valid!\n");
- return (-ENODEV);
+ 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 -ENOTTY;
- } /* End switch cmd */
- return (0) ;
+ digi_poller_inhibited = state;
+ break;
+ }
+
+ 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;
+ }
+ default:
+ return -ENOTTY;
+ }
+ return 0;
}
-/* --------------------- Begin pc_ioctl ----------------------- */
static int pc_tiocmget(struct tty_struct *tty, struct file *file)
{
spin_lock_irqsave(&epca_lock, flags);
/*
- * I think this modemfake stuff is broken. It doesn't
- * correctly reflect the behaviour desired by the TIOCM*
- * ioctls. Therefore this is probably broken.
+ * I think this modemfake stuff is broken. It doesn't correctly reflect
+ * the behaviour desired by the TIOCM* ioctls. Therefore this is
+ * probably broken.
*/
if (set & TIOCM_RTS) {
ch->modemfake |= ch->m_rts;
ch->modem &= ~ch->m_dtr;
}
globalwinon(ch);
- /* --------------------------------------------------------------
- The below routine generally sets up parity, baud, flow control
- issues, etc.... It effect both control flags and input flags.
- ------------------------------------------------------------------ */
+ /*
+ * 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);
spin_unlock_irqrestore(&epca_lock, flags);
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;
unsigned long flags;
struct board_chan __iomem *bc;
struct channel *ch = (struct channel *) tty->driver_data;
void __user *argp = (void __user *)arg;
-
+
if (ch)
bc = ch->brdchan;
- else
+ else
return -EINVAL;
- /* -------------------------------------------------------------------
- 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 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 */
- spin_lock_irqsave(&epca_lock, flags);
- setup_empty_event(tty,ch);
- spin_unlock_irqrestore(&epca_lock, flags);
- 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;
+ /*
+ * 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) {
+ 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 */
+ spin_lock_irqsave(&epca_lock, flags);
+ setup_empty_event(tty,ch);
+ spin_unlock_irqrestore(&epca_lock, flags);
+ 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 */
- spin_lock_irqsave(&epca_lock, flags);
- setup_empty_event(tty,ch);
- spin_unlock_irqrestore(&epca_lock, flags);
- tty_wait_until_sent(tty, 0);
- digi_send_break(ch, arg ? arg*(HZ/10) : HZ/4);
- return 0;
- case TIOCGSOFTCAR:
- if (put_user(C_CLOCAL(tty)?1:0, (unsigned long __user *)arg))
- return -EFAULT;
- return 0;
- case TIOCSSOFTCAR:
+ /* Setup an event to indicate when the transmit buffer empties */
+ spin_lock_irqsave(&epca_lock, flags);
+ setup_empty_event(tty,ch);
+ spin_unlock_irqrestore(&epca_lock, flags);
+ tty_wait_until_sent(tty, 0);
+ digi_send_break(ch, arg ? arg*(HZ/10) : HZ/4);
+ return 0;
+ case TIOCGSOFTCAR:
+ if (put_user(C_CLOCAL(tty)?1:0, (unsigned long __user *)arg))
+ return -EFAULT;
+ return 0;
+ case TIOCSSOFTCAR:
{
unsigned int value;
(value ? CLOCAL : 0));
return 0;
}
- case TIOCMODG:
- mflag = pc_tiocmget(tty, file);
- if (put_user(mflag, (unsigned long __user *)argp))
- return -EFAULT;
- break;
- case TIOCMODS:
- if (get_user(mstat, (unsigned __user *)argp))
- return -EFAULT;
- return pc_tiocmset(tty, file, mstat, ~mstat);
- case TIOCSDTR:
- spin_lock_irqsave(&epca_lock, flags);
- ch->omodem |= ch->m_dtr;
- globalwinon(ch);
- fepcmd(ch, SETMODEM, ch->m_dtr, 0, 10, 1);
- memoff(ch);
- spin_unlock_irqrestore(&epca_lock, flags);
- break;
+ case TIOCMODG:
+ mflag = pc_tiocmget(tty, file);
+ if (put_user(mflag, (unsigned long __user *)argp))
+ return -EFAULT;
+ break;
+ case TIOCMODS:
+ if (get_user(mstat, (unsigned __user *)argp))
+ return -EFAULT;
+ return pc_tiocmset(tty, file, mstat, ~mstat);
+ case TIOCSDTR:
+ spin_lock_irqsave(&epca_lock, flags);
+ ch->omodem |= ch->m_dtr;
+ globalwinon(ch);
+ fepcmd(ch, SETMODEM, ch->m_dtr, 0, 10, 1);
+ memoff(ch);
+ spin_unlock_irqrestore(&epca_lock, flags);
+ break;
- case TIOCCDTR:
+ case TIOCCDTR:
+ spin_lock_irqsave(&epca_lock, flags);
+ ch->omodem &= ~ch->m_dtr;
+ globalwinon(ch);
+ fepcmd(ch, SETMODEM, 0, ch->m_dtr, 10, 1);
+ memoff(ch);
+ spin_unlock_irqrestore(&epca_lock, flags);
+ break;
+ case DIGI_GETA:
+ if (copy_to_user(argp, &ch->digiext, sizeof(digi_t)))
+ return -EFAULT;
+ break;
+ case DIGI_SETAW:
+ case DIGI_SETAF:
+ if (cmd == DIGI_SETAW) {
+ /* Setup an event to indicate when the transmit buffer empties */
spin_lock_irqsave(&epca_lock, flags);
- ch->omodem &= ~ch->m_dtr;
- globalwinon(ch);
- fepcmd(ch, SETMODEM, 0, ch->m_dtr, 10, 1);
- memoff(ch);
+ setup_empty_event(tty,ch);
spin_unlock_irqrestore(&epca_lock, flags);
- break;
- case DIGI_GETA:
- if (copy_to_user(argp, &ch->digiext, sizeof(digi_t)))
- return -EFAULT;
- break;
- case DIGI_SETAW:
- case DIGI_SETAF:
- if (cmd == DIGI_SETAW) {
- /* Setup an event to indicate when the transmit buffer empties */
- spin_lock_irqsave(&epca_lock, flags);
- setup_empty_event(tty,ch);
- spin_unlock_irqrestore(&epca_lock, flags);
- tty_wait_until_sent(tty, 0);
- } else {
- /* ldisc lock already held in ioctl */
- if (tty->ldisc.flush_buffer)
- tty->ldisc.flush_buffer(tty);
- }
- /* Fall Thru */
- case DIGI_SETA:
- if (copy_from_user(&ch->digiext, argp, sizeof(digi_t)))
- return -EFAULT;
-
- 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;
+ tty_wait_until_sent(tty, 0);
+ } else {
+ /* ldisc lock already held in ioctl */
+ if (tty->ldisc.flush_buffer)
+ tty->ldisc.flush_buffer(tty);
+ }
+ /* Fall Thru */
+ case DIGI_SETA:
+ if (copy_from_user(&ch->digiext, argp, sizeof(digi_t)))
+ return -EFAULT;
+
+ 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;
}
-
- spin_lock_irqsave(&epca_lock, flags);
- globalwinon(ch);
- /* -----------------------------------------------------------------
- The below routine generally sets up parity, baud, flow control
- issues, etc.... It effect both control flags and input flags.
- ------------------------------------------------------------------- */
+ spin_lock_irqsave(&epca_lock, flags);
+ globalwinon(ch);
- epcaparam(tty,ch);
- memoff(ch);
- spin_unlock_irqrestore(&epca_lock, flags);
- break;
+ /*
+ * 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);
+ spin_unlock_irqrestore(&epca_lock, flags);
+ break;
+
+ case DIGI_GETFLOW:
+ case DIGI_GETAFLOW:
+ spin_lock_irqsave(&epca_lock, flags);
+ globalwinon(ch);
+ if (cmd == DIGI_GETFLOW) {
+ dflow.startc = readb(&bc->startc);
+ dflow.stopc = readb(&bc->stopc);
+ } else {
+ dflow.startc = readb(&bc->startca);
+ dflow.stopc = readb(&bc->stopca);
+ }
+ memoff(ch);
+ spin_unlock_irqrestore(&epca_lock, flags);
+
+ if (copy_to_user(argp, &dflow, sizeof(dflow)))
+ return -EFAULT;
+ break;
+
+ case DIGI_SETAFLOW:
+ case DIGI_SETFLOW:
+ if (cmd == DIGI_SETFLOW) {
+ startc = ch->startc;
+ stopc = ch->stopc;
+ } else {
+ startc = ch->startca;
+ stopc = ch->stopca;
+ }
- case DIGI_GETFLOW:
- case DIGI_GETAFLOW:
+ if (copy_from_user(&dflow, argp, sizeof(dflow)))
+ return -EFAULT;
+
+ if (dflow.startc != startc || dflow.stopc != stopc) { /* Begin if setflow toggled */
spin_lock_irqsave(&epca_lock, flags);
globalwinon(ch);
- if (cmd == DIGI_GETFLOW) {
- dflow.startc = readb(&bc->startc);
- dflow.stopc = readb(&bc->stopc);
- } else {
- dflow.startc = readb(&bc->startca);
- dflow.stopc = readb(&bc->stopca);
- }
- memoff(ch);
- spin_unlock_irqrestore(&epca_lock, flags);
- if (copy_to_user(argp, &dflow, sizeof(dflow)))
- return -EFAULT;
- break;
-
- case DIGI_SETAFLOW:
- case DIGI_SETFLOW:
if (cmd == DIGI_SETFLOW) {
- startc = ch->startc;
- stopc = ch->stopc;
+ ch->fepstartc = ch->startc = dflow.startc;
+ ch->fepstopc = ch->stopc = dflow.stopc;
+ fepcmd(ch, SONOFFC, ch->fepstartc, ch->fepstopc, 0, 1);
} else {
- startc = ch->startca;
- stopc = ch->stopca;
+ ch->fepstartca = ch->startca = dflow.startc;
+ ch->fepstopca = ch->stopca = dflow.stopc;
+ fepcmd(ch, SAUXONOFFC, ch->fepstartca, ch->fepstopca, 0, 1);
}
- if (copy_from_user(&dflow, argp, sizeof(dflow)))
- return -EFAULT;
-
- if (dflow.startc != startc || dflow.stopc != stopc) { /* Begin if setflow toggled */
- spin_lock_irqsave(&epca_lock, flags);
- 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);
+ if (ch->statusflags & TXSTOPPED)
+ pc_start(tty);
- memoff(ch);
- spin_unlock_irqrestore(&epca_lock, flags);
- } /* End if setflow toggled */
- break;
- default:
- return -ENOIOCTLCMD;
- } /* End switch cmd */
+ memoff(ch);
+ spin_unlock_irqrestore(&epca_lock, flags);
+ } /* End if setflow toggled */
+ break;
+ default:
+ return -ENOIOCTLCMD;
+ }
return 0;
-} /* End pc_ioctl */
-
-/* --------------------- Begin pc_set_termios ----------------------- */
+}
static void pc_set_termios(struct tty_struct *tty, struct ktermios *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.
- ------------------------------------------------------------- */
+ /*
+ * 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 */
spin_lock_irqsave(&epca_lock, flags);
globalwinon(ch);
wake_up_interruptible(&ch->open_wait);
} /* End if channel valid */
-
-} /* End pc_set_termios */
-
-/* --------------------- Begin do_softint ----------------------- */
+}
static void do_softint(struct work_struct *work)
-{ /* Begin do_softint */
+{
struct channel *ch = container_of(work, struct channel, tqueue);
/* Called in response to a modem change event */
- if (ch && ch->magic == EPCA_MAGIC) { /* Begin EPCA_MAGIC */
+ if (ch && ch->magic == 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 */
+ if (test_and_clear_bit(EPCA_EVENT_HANGUP, &ch->event)) {
tty_hangup(tty); /* FIXME: module removal race here - AKPM */
wake_up_interruptible(&ch->open_wait);
ch->asyncflags &= ~ASYNC_NORMAL_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 ----------------------- */
+ }
+}
+/*
+ * pc_stop and pc_start provide software flow control to the routine and the
+ * pc_ioctl routine.
+ */
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 */
+ /*
+ * verifyChannel returns the channel from the tty struct if it is
+ * valid. This serves as a sanity check.
+ */
+ if ((ch = verifyChannel(tty)) != NULL) {
spin_lock_irqsave(&epca_lock, flags);
- if ((ch->statusflags & TXSTOPPED) == 0) { /* Begin if transmit stop requested */
+ if ((ch->statusflags & TXSTOPPED) == 0) { /* Begin if transmit stop requested */
globalwinon(ch);
/* STOP transmitting now !! */
fepcmd(ch, PAUSETX, 0, 0, 0, 0);
memoff(ch);
} /* End if transmit stop requested */
spin_unlock_irqrestore(&epca_lock, 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 */
+ /*
+ * 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;
spin_lock_irqsave(&epca_lock, flags);
/* Just in case output was resumed because of a change in Digi-flow */
memoff(ch);
} /* End transmit resume requested */
spin_unlock_irqrestore(&epca_lock, 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 occurrence 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 */
+ }
+}
+
+/*
+ * 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
+ * occurrence 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.
+ */
+static void pc_throttle(struct tty_struct *tty)
+{
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 */
+ /*
+ * verifyChannel returns the channel from the tty struct if it is
+ * valid. This serves as a sanity check.
+ */
+ if ((ch = verifyChannel(tty)) != NULL) {
spin_lock_irqsave(&epca_lock, flags);
if ((ch->statusflags & RXSTOPPED) == 0) {
globalwinon(ch);
memoff(ch);
}
spin_unlock_irqrestore(&epca_lock, 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;
- /* ---------------------------------------------------------
- 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 */
+ /*
+ * verifyChannel returns the channel from the tty struct if it is
+ * valid. This serves as a sanity check.
+ */
+ if ((ch = verifyChannel(tty)) != NULL) {
/* Just in case output was resumed because of a change in Digi-flow */
spin_lock_irqsave(&epca_lock, flags);
if (ch->statusflags & RXSTOPPED) {
memoff(ch);
}
spin_unlock_irqrestore(&epca_lock, 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;
spin_lock_irqsave(&epca_lock, flags);
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...
- ------------------------------------------------------------------------ */
+ /*
+ * 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);
spin_unlock_irqrestore(&epca_lock, flags);
-} /* End digi_send_break */
-
-/* --------------------- Begin setup_empty_event ----------------------- */
+}
/* Caller MUST hold the lock */
-
static void setup_empty_event(struct tty_struct *tty, struct channel *ch)
-{ /* Begin setup_empty_event */
-
+{
struct board_chan __iomem *bc = ch->brdchan;
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).
- --------------------------------------------------------------------- */
+ /*
+ * When set the iempty flag request a event to be generated when the
+ * transmit buffer is empty (If there is no BREAK in progress).
+ */
writeb(1, &bc->iempty);
memoff(ch);
-} /* End setup_empty_event */
+}
-/* ---------------------- 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;
+ /*
+ * 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 "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 "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 "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 "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 = ints[index];
- if (ints[index] <= 0) {
- printk(KERN_ERR "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 = ints[index];
- if (ints[index] <= 0) {
- printk(KERN_ERR "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;
+ 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 "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 "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 "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 "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;
- default:
- printk(KERN_ERR "<Error> - epca_setup: Too many integer parms\n");
+ case 5:
+ board.port = ints[index];
+ if (ints[index] <= 0) {
+ printk(KERN_ERR "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 = ints[index];
+ if (ints[index] <= 0) {
+ printk(KERN_ERR "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 */
/* 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 "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 "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 "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 "epca_setup: Invalid port count %s\n", str);
- invalid_lilo_config = 1;
- setup_error_code |= INVALID_NUM_PORTS;
- return;
- }
+ 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 "epca_setup: Invalid status %s\n", str);
+ invalid_lilo_config = 1;
+ setup_error_code |= INVALID_BOARD_STATUS;
+ return;
+ }
+ last = index;
+ break;
- /* ------------------------------------------------------------
- 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 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 "epca_setup: Invalid i/o address %s\n", str);
- invalid_lilo_config = 1;
- setup_error_code |= INVALID_PORT_BASE;
- return;
- }
+ 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 "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 "epca_setup: Invalid altpin %s\n", str);
+ invalid_lilo_config = 1;
+ setup_error_code |= INVALID_ALTPIN;
+ return;
+ }
+ last = index;
+ break;
- board.port = simple_strtoul(str, NULL, 16);
- last = index;
- break;
+ case 4:
+ t2 = str;
+ while (isdigit(*t2))
+ t2++;
- case 6:
- t2 = str;
- while (isxdigit(*t2))
- t2++;
+ if (*t2) {
+ printk(KERN_ERR "epca_setup: Invalid port count %s\n", str);
+ invalid_lilo_config = 1;
+ setup_error_code |= INVALID_NUM_PORTS;
+ return;
+ }
- if (*t2) {
- printk(KERN_ERR "epca_setup: Invalid memory base %s\n",str);
- invalid_lilo_config = 1;
- setup_error_code |= INVALID_MEM_BASE;
- return;
- }
- board.membase = simple_strtoul(str, NULL, 16);
- last = index;
- break;
- default:
- printk(KERN_ERR "epca: Too many string parms\n");
+ /*
+ * 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 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 "epca_setup: Invalid i/o address %s\n", str);
+ invalid_lilo_config = 1;
+ setup_error_code |= INVALID_PORT_BASE;
+ return;
+ }
+
+ board.port = simple_strtoul(str, NULL, 16);
+ last = index;
+ break;
+
+ case 6:
+ t2 = str;
+ while (isxdigit(*t2))
+ t2++;
+
+ if (*t2) {
+ printk(KERN_ERR "epca_setup: Invalid memory base %s\n",str);
+ invalid_lilo_config = 1;
+ setup_error_code |= INVALID_MEM_BASE;
return;
+ }
+ board.membase = simple_strtoul(str, NULL, 16);
+ last = index;
+ break;
+ default:
+ printk(KERN_ERR "epca: Too many string parms\n");
+ return;
}
str = temp;
} /* End while there is a string arg */
printk(KERN_ERR "epca: 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],
+ 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 */
-
-
-/* ------------------------ Begin init_PCI --------------------------- */
+}
enum epic_board_types {
brd_xr = 0,
brd_xrj,
};
-
/* indexed directly by epic_board_types enum */
static struct {
unsigned char board_type;
{ PCIXRJ, 2, },
};
-static int __devinit epca_init_one (struct pci_dev *pdev,
+static int __devinit epca_init_one(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
static int board_num = -1;
board_idx = board_num + num_cards;
if (board_idx >= MAXBOARDS)
goto err_out;
-
+
addr = pci_resource_start (pdev, epca_info_tbl[info_idx].bar_idx);
if (!addr) {
printk (KERN_ERR PFX "PCI region #%d not available (size 0)\n",
goto err_out_free_memregion;
}
- /* --------------------------------------------------------------
- I don't know what the below does, but the hardware guys say
- its required on everything except PLX (In this case XRJ).
- ---------------------------------------------------------------- */
+ /*
+ * I don't know what the below does, but the hardware guys say its
+ * required on everything except PLX (In this case XRJ).
+ */
if (info_idx != brd_xrj) {
- pci_write_config_byte(pdev, 0x40, 0);
+ pci_write_config_byte(pdev, 0x40, 0);
pci_write_config_byte(pdev, 0x46, 0);
}
-
+
return 0;
err_out_free_memregion:
MODULE_DEVICE_TABLE(pci, epca_pci_tbl);
int __init init_PCI (void)
-{ /* Begin init_PCI */
+{
memset (&epca_driver, 0, sizeof (epca_driver));
epca_driver.name = "epca";
epca_driver.id_table = epca_pci_tbl;
projects / linux-2.6 / commitdiff