diff options
| author | Alexey Dobriyan <adobriyan@gmail.com> | 2007-10-16 23:26:37 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 08:42:50 -0700 |
| commit | ae0b78d09dc1d521551e225a9831aba1eded518f (patch) | |
| tree | 37c2eea67202f4375dce3ca3803248deaf640747 /drivers/char | |
| parent | 323211371073ce4a99b6efc69379589d6a640d35 (diff) | |
epca.c: reformat comments and coding style improvements
* Remove stupid comments, like, at the beginning of every function that
function begins (twice per function) and at the end (once)
* Remove trailing or otherwise broken whitespace as per let c_space_errors=1
* Reformat comments to fit it into 80 columns and remove stupid ------------'s.
* Indent case labels on the same column where switch begins
* other minor CS tweaks not worth mentioning
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/epca.c | 2611 |
1 files changed, 1202 insertions, 1409 deletions
diff --git a/drivers/char/epca.c b/drivers/char/epca.c index c6c56fb8ba5..ffcecde9e2a 100644 --- a/drivers/char/epca.c +++ b/drivers/char/epca.c @@ -1,34 +1,30 @@ /* - - 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> @@ -54,13 +50,10 @@ #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 @@ -68,60 +61,48 @@ #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); @@ -170,8 +151,6 @@ static void dummy_memoff(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 *); @@ -213,62 +192,55 @@ static int pc_write(struct tty_struct *, const unsigned char *, int); 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); @@ -300,32 +272,30 @@ static void pcxem_memoff(struct channel *ch) } /* ----------------- 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) @@ -335,10 +305,9 @@ 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) @@ -353,12 +322,12 @@ static void pcxi_globalwinon(struct channel *ch) 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) @@ -376,16 +345,13 @@ static void pcxi_assertmemoff(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) { } @@ -418,15 +384,14 @@ static void dummy_assertmemoff(struct channel *ch) { } -/* ----------------- 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])) { @@ -435,62 +400,55 @@ static struct channel *verifyChannel(struct tty_struct *tty) } } 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; @@ -498,7 +456,7 @@ static void pc_close(struct tty_struct * tty, struct file * filp) 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) @@ -513,27 +471,24 @@ static void pc_close(struct tty_struct * tty, struct file * filp) 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); @@ -541,50 +496,40 @@ static void shutdown(struct channel *ch) 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) @@ -599,15 +544,12 @@ static void pc_hangup(struct tty_struct *tty) 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; @@ -617,25 +559,23 @@ static int pc_write(struct tty_struct * tty, 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; @@ -650,37 +590,36 @@ static int pc_write(struct tty_struct * tty, 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; @@ -692,7 +631,7 @@ static int pc_write(struct tty_struct * tty, head = 0; dataLen = tail; } - } /* End while there is data to copy onto card */ + } ch->statusflags |= TXBUSY; globalwinon(ch); writew(head, &bc->tin); @@ -703,22 +642,16 @@ static int pc_write(struct tty_struct * tty, } 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; @@ -727,11 +660,10 @@ static int pc_write_room(struct tty_struct *tty) 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); @@ -757,14 +689,10 @@ static int pc_write_room(struct tty_struct *tty) } /* 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; @@ -772,13 +700,12 @@ static int pc_chars_in_buffer(struct tty_struct *tty) 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); @@ -793,45 +720,40 @@ static int pc_chars_in_buffer(struct tty_struct *tty) 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; @@ -844,51 +766,47 @@ static void pc_flush_buffer(struct tty_struct *tty) 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); @@ -899,17 +817,17 @@ static int block_til_ready(struct tty_struct *tty, } 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); @@ -918,19 +836,18 @@ static int block_til_ready(struct tty_struct *tty, 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)) { @@ -938,16 +855,15 @@ static int block_til_ready(struct tty_struct *tty, 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); @@ -962,13 +878,10 @@ static int block_til_ready(struct tty_struct *tty, 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; @@ -984,12 +897,11 @@ static int pc_open(struct tty_struct *tty, struct file * filp) /* 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"); @@ -1010,49 +922,48 @@ static int pc_open(struct tty_struct *tty, struct file * filp) 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); @@ -1061,10 +972,10 @@ static int pc_open(struct tty_struct *tty, struct file * filp) 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); @@ -1073,13 +984,12 @@ static int pc_open(struct tty_struct *tty, struct file * filp) 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; @@ -1092,8 +1002,7 @@ static void __exit epca_module_exit(void) 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; @@ -1101,23 +1010,20 @@ static void __exit epca_module_exit(void) 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 = { @@ -1148,10 +1054,8 @@ static struct tty_operations info_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; @@ -1169,63 +1073,57 @@ static int __init pc_init(void) 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; @@ -1256,120 +1154,108 @@ static int __init pc_init(void) 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) { @@ -1383,10 +1269,7 @@ static int __init pc_init(void) 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); @@ -1400,51 +1283,47 @@ out2: 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"); @@ -1465,95 +1344,87 @@ static void post_fep_init(unsigned int crd) 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; @@ -1568,71 +1439,67 @@ static void post_fep_init(unsigned int crd) 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 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 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; + } 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; @@ -1640,7 +1507,7 @@ static void post_fep_init(unsigned int crd) ch->fepstopc = 0; ch->fepstartca = 0; ch->fepstopca = 0; - + ch->close_delay = 50; ch->count = 0; ch->blocked_open = 0; @@ -1648,80 +1515,66 @@ static void post_fep_init(unsigned int crd) 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; @@ -1731,28 +1584,28 @@ static void doevent(int crd) 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); @@ -1772,37 +1625,36 @@ static void doevent(int crd) 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); @@ -1810,13 +1662,11 @@ static void doevent(int crd) 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; @@ -1831,11 +1681,11 @@ static void fepcmd(struct channel *ch, int cmd, int word_or_byte, 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; @@ -1860,7 +1710,7 @@ static void fepcmd(struct channel *ch, int cmd, int word_or_byte, 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"); @@ -1869,26 +1719,23 @@ static void fepcmd(struct channel *ch, int cmd, int word_or_byte, 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) { @@ -1918,86 +1765,73 @@ static unsigned termios2digi_h(struct channel *ch, unsigned cflag) 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; @@ -2013,28 +1847,29 @@ static void epcaparam(struct tty_struct *tty, struct channel *ch) 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 @@ -2045,19 +1880,19 @@ static void epcaparam(struct tty_struct *tty, struct channel *ch) /* 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) @@ -2066,23 +1901,23 @@ static void epcaparam(struct tty_struct *tty, struct channel *ch) 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); @@ -2091,28 +1926,26 @@ static void epcaparam(struct tty_struct *tty, struct channel *ch) 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; @@ -2121,11 +1954,10 @@ static void receive_data(struct channel *ch) 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; @@ -2136,10 +1968,10 @@ static void receive_data(struct channel *ch) 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; @@ -2148,10 +1980,7 @@ static void receive_data(struct channel *ch) 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; @@ -2168,22 +1997,20 @@ static void receive_data(struct channel *ch) 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; @@ -2191,28 +2018,26 @@ static void receive_data(struct channel *ch) 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 ; @@ -2220,45 +2045,44 @@ static int info_ioctl(struct tty_struct *tty, struct file * file, 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) { @@ -2304,9 +2128,9 @@ static int pc_tiocmset(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; @@ -2325,10 +2149,10 @@ static int pc_tiocmset(struct tty_struct *tty, struct file *file, 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); @@ -2337,8 +2161,7 @@ static int pc_tiocmset(struct tty_struct *tty, struct file *file, 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; @@ -2347,49 +2170,47 @@ static int pc_ioctl(struct tty_struct *tty, struct file * file, 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; @@ -2400,144 +2221,141 @@ static int pc_ioctl(struct tty_struct *tty, struct file * file, (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; + } + + if (copy_from_user(&dflow, argp, sizeof(dflow))) + return -EFAULT; - case DIGI_GETFLOW: - case DIGI_GETAFLOW: + 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 (ch->statusflags & TXSTOPPED) + pc_start(tty); - 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); - - 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); @@ -2554,47 +2372,40 @@ static void pc_set_termios(struct tty_struct *tty, struct ktermios *old_termios) 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); @@ -2602,19 +2413,17 @@ static void pc_stop(struct tty_struct *tty) 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 */ @@ -2630,28 +2439,25 @@ static void pc_start(struct tty_struct *tty) 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); @@ -2660,20 +2466,18 @@ static void pc_throttle(struct tty_struct * tty) 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) { @@ -2683,151 +2487,143 @@ static void pc_unthrottle(struct tty_struct *tty) 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 */ @@ -2844,120 +2640,121 @@ void epca_setup(char *str, int *ints) /* 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; - board.port = simple_strtoul(str, NULL, 16); - 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 6: - t2 = str; - while (isxdigit(*t2)) - t2++; + case 4: + t2 = str; + while (isdigit(*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"); + if (*t2) { + printk(KERN_ERR "epca_setup: Invalid port count %s\n", str); + invalid_lilo_config = 1; + setup_error_code |= INVALID_NUM_PORTS; + return; + } + + /* + * There is not a man page for simple_strtoul but the + * code can be found in vsprintf.c. The first argument + * is the string to translate (To an unsigned long + * obviously), the second argument can be the address + * of any character variable or a NULL. If a variable + * is given, the end pointer of the string will be + * stored in that variable; if a NULL is given the 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 */ @@ -2966,19 +2763,16 @@ void epca_setup(char *str, int *ints) 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, @@ -2987,7 +2781,6 @@ enum epic_board_types { brd_xrj, }; - /* indexed directly by epic_board_types enum */ static struct { unsigned char board_type; @@ -2999,7 +2792,7 @@ static struct { { 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; @@ -3013,7 +2806,7 @@ static int __devinit epca_init_one (struct pci_dev *pdev, 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", @@ -3053,15 +2846,15 @@ static int __devinit epca_init_one (struct pci_dev *pdev, 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: @@ -3086,7 +2879,7 @@ static struct pci_device_id epca_pci_tbl[] = { 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; |