diff options
| author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
| commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
| tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/char/epca.c | |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/char/epca.c')
| -rw-r--r-- | drivers/char/epca.c | 3789 |
1 files changed, 3789 insertions, 0 deletions
diff --git a/drivers/char/epca.c b/drivers/char/epca.c new file mode 100644 index 00000000000..6025e1866c7 --- /dev/null +++ b/drivers/char/epca.c @@ -0,0 +1,3789 @@ +/* + + + Copyright (C) 1996 Digi International. + + For technical support please email digiLinux@dgii.com or + call Digi tech support at (612) 912-3456 + + Much of this design and code came from epca.c which was + copyright (C) 1994, 1995 Troy De Jongh, and subsquently + modified by David Nugent, Christoph Lameter, Mike McLagan. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + +--------------------------------------------------------------------------- */ +/* See README.epca for change history --DAT*/ + + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/init.h> +#include <linux/serial.h> +#include <linux/delay.h> +#include <linux/ctype.h> +#include <linux/tty.h> +#include <linux/tty_flip.h> +#include <linux/slab.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <asm/uaccess.h> +#include <asm/io.h> + +#ifdef CONFIG_PCI +#define ENABLE_PCI +#endif /* CONFIG_PCI */ + +#define putUser(arg1, arg2) put_user(arg1, (unsigned long __user *)arg2) +#define getUser(arg1, arg2) get_user(arg1, (unsigned __user *)arg2) + +#ifdef ENABLE_PCI +#include <linux/pci.h> +#include "digiPCI.h" +#endif /* ENABLE_PCI */ + +#include "digi1.h" +#include "digiFep1.h" +#include "epca.h" +#include "epcaconfig.h" + +#if BITS_PER_LONG != 32 +# error FIXME: this driver only works on 32-bit platforms +#endif + +/* ---------------------- Begin defines ------------------------ */ + +#define VERSION "1.3.0.1-LK" + +/* This major needs to be submitted to Linux to join the majors list */ + +#define DIGIINFOMAJOR 35 /* For Digi specific ioctl */ + + +#define MAXCARDS 7 +#define epcaassert(x, msg) if (!(x)) epca_error(__LINE__, msg) + +#define PFX "epca: " + +/* ----------------- Begin global definitions ------------------- */ + +static char mesg[100]; +static int nbdevs, num_cards, liloconfig; +static int digi_poller_inhibited = 1 ; + +static int setup_error_code; +static int invalid_lilo_config; + +/* ----------------------------------------------------------------------- + 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. +-------------------------------------------------------------------------- */ + +static struct channel digi_channels[MAX_ALLOC]; + +/* ------------------------------------------------------------------------ + card_ptr is an array used to hold the address of the + first channel structure of each card. This array will hold + the addresses of various channels located in digi_channels. +-------------------------------------------------------------------------- */ +static struct channel *card_ptr[MAXCARDS]; + +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. +----------------------------------------------------------------------- */ + +static inline void memwinon(struct board_info *b, unsigned int win); +static inline void memwinoff(struct board_info *b, unsigned int win); +static inline void globalwinon(struct channel *ch); +static inline void rxwinon(struct channel *ch); +static inline void txwinon(struct channel *ch); +static inline void memoff(struct channel *ch); +static inline void assertgwinon(struct channel *ch); +static inline void assertmemoff(struct channel *ch); + +/* ---- Begin more 'specific' memory functions for cx_like products --- */ + +static inline void pcxem_memwinon(struct board_info *b, unsigned int win); +static inline void pcxem_memwinoff(struct board_info *b, unsigned int win); +static inline void pcxem_globalwinon(struct channel *ch); +static inline void pcxem_rxwinon(struct channel *ch); +static inline void pcxem_txwinon(struct channel *ch); +static inline void pcxem_memoff(struct channel *ch); + +/* ------ Begin more 'specific' memory functions for the pcxe ------- */ + +static inline void pcxe_memwinon(struct board_info *b, unsigned int win); +static inline void pcxe_memwinoff(struct board_info *b, unsigned int win); +static inline void pcxe_globalwinon(struct channel *ch); +static inline void pcxe_rxwinon(struct channel *ch); +static inline void pcxe_txwinon(struct channel *ch); +static inline void pcxe_memoff(struct channel *ch); + +/* ---- Begin more 'specific' memory functions for the pc64xe and pcxi ---- */ +/* Note : pc64xe and pcxi share the same windowing routines */ + +static inline void pcxi_memwinon(struct board_info *b, unsigned int win); +static inline void pcxi_memwinoff(struct board_info *b, unsigned int win); +static inline void pcxi_globalwinon(struct channel *ch); +static inline void pcxi_rxwinon(struct channel *ch); +static inline void pcxi_txwinon(struct channel *ch); +static inline void pcxi_memoff(struct channel *ch); + +/* - Begin 'specific' do nothing memory functions needed for some cards - */ + +static inline void dummy_memwinon(struct board_info *b, unsigned int win); +static inline void dummy_memwinoff(struct board_info *b, unsigned int win); +static inline void dummy_globalwinon(struct channel *ch); +static inline void dummy_rxwinon(struct channel *ch); +static inline void dummy_txwinon(struct channel *ch); +static inline void dummy_memoff(struct channel *ch); +static inline void dummy_assertgwinon(struct channel *ch); +static inline void dummy_assertmemoff(struct channel *ch); + +/* ------------------- Begin declare functions ----------------------- */ + +static inline struct channel *verifyChannel(register struct tty_struct *); +static inline void pc_sched_event(struct channel *, int); +static void epca_error(int, char *); +static void pc_close(struct tty_struct *, struct file *); +static void shutdown(struct channel *); +static void pc_hangup(struct tty_struct *); +static void pc_put_char(struct tty_struct *, unsigned char); +static int pc_write_room(struct tty_struct *); +static int pc_chars_in_buffer(struct tty_struct *); +static void pc_flush_buffer(struct tty_struct *); +static void pc_flush_chars(struct tty_struct *); +static int block_til_ready(struct tty_struct *, struct file *, + struct channel *); +static int pc_open(struct tty_struct *, struct file *); +static void post_fep_init(unsigned int crd); +static void epcapoll(unsigned long); +static void doevent(int); +static void fepcmd(struct channel *, int, int, int, int, int); +static unsigned termios2digi_h(struct channel *ch, unsigned); +static unsigned termios2digi_i(struct channel *ch, unsigned); +static unsigned termios2digi_c(struct channel *ch, unsigned); +static void epcaparam(struct tty_struct *, struct channel *); +static void receive_data(struct channel *); +static int pc_ioctl(struct tty_struct *, struct file *, + unsigned int, unsigned long); +static int info_ioctl(struct tty_struct *, struct file *, + unsigned int, unsigned long); +static void pc_set_termios(struct tty_struct *, struct termios *); +static void do_softint(void *); +static void pc_stop(struct tty_struct *); +static void pc_start(struct tty_struct *); +static void pc_throttle(struct tty_struct * tty); +static void pc_unthrottle(struct tty_struct *tty); +static void digi_send_break(struct channel *ch, int msec); +static void setup_empty_event(struct tty_struct *tty, struct channel *ch); +void epca_setup(char *, int *); +void console_print(const char *); + +static int get_termio(struct tty_struct *, struct termio __user *); +static int pc_write(struct tty_struct *, const unsigned char *, int); +int pc_init(void); + +#ifdef ENABLE_PCI +static int init_PCI(void); +#endif /* ENABLE_PCI */ + + +/* ------------------------------------------------------------------ + Table of functions for each board to handle memory. Mantaining + parallelism is a *very* good idea here. The idea is for the + runtime code to blindly call these functions, not knowing/caring + about the underlying hardware. This stuff should contain no + conditionals; if more functionality is needed a different entry + should be established. These calls are the interface calls and + are the only functions that should be accessed. Anyone caught + making direct calls deserves what they get. +-------------------------------------------------------------------- */ + +static inline void memwinon(struct board_info *b, unsigned int win) +{ + (b->memwinon)(b, win); +} + +static inline void memwinoff(struct board_info *b, unsigned int win) +{ + (b->memwinoff)(b, win); +} + +static inline void globalwinon(struct channel *ch) +{ + (ch->board->globalwinon)(ch); +} + +static inline void rxwinon(struct channel *ch) +{ + (ch->board->rxwinon)(ch); +} + +static inline void txwinon(struct channel *ch) +{ + (ch->board->txwinon)(ch); +} + +static inline void memoff(struct channel *ch) +{ + (ch->board->memoff)(ch); +} +static inline void assertgwinon(struct channel *ch) +{ + (ch->board->assertgwinon)(ch); +} + +static inline void assertmemoff(struct channel *ch) +{ + (ch->board->assertmemoff)(ch); +} + +/* --------------------------------------------------------- + PCXEM windowing is the same as that used in the PCXR + and CX series cards. +------------------------------------------------------------ */ + +static inline void pcxem_memwinon(struct board_info *b, unsigned int win) +{ + outb_p(FEPWIN|win, (int)b->port + 1); +} + +static inline void pcxem_memwinoff(struct board_info *b, unsigned int win) +{ + outb_p(0, (int)b->port + 1); +} + +static inline void pcxem_globalwinon(struct channel *ch) +{ + outb_p( FEPWIN, (int)ch->board->port + 1); +} + +static inline void pcxem_rxwinon(struct channel *ch) +{ + outb_p(ch->rxwin, (int)ch->board->port + 1); +} + +static inline void pcxem_txwinon(struct channel *ch) +{ + outb_p(ch->txwin, (int)ch->board->port + 1); +} + +static inline void pcxem_memoff(struct channel *ch) +{ + outb_p(0, (int)ch->board->port + 1); +} + +/* ----------------- Begin pcxe memory window stuff ------------------ */ + +static inline void pcxe_memwinon(struct board_info *b, unsigned int win) +{ + outb_p(FEPWIN | win, (int)b->port + 1); +} + +static inline void pcxe_memwinoff(struct board_info *b, unsigned int win) +{ + outb_p(inb((int)b->port) & ~FEPMEM, + (int)b->port + 1); + outb_p(0, (int)b->port + 1); +} + +static inline void pcxe_globalwinon(struct channel *ch) +{ + outb_p( FEPWIN, (int)ch->board->port + 1); +} + +static inline void pcxe_rxwinon(struct channel *ch) +{ + outb_p(ch->rxwin, (int)ch->board->port + 1); +} + +static inline void pcxe_txwinon(struct channel *ch) +{ + outb_p(ch->txwin, (int)ch->board->port + 1); +} + +static inline void pcxe_memoff(struct channel *ch) +{ + outb_p(0, (int)ch->board->port); + outb_p(0, (int)ch->board->port + 1); +} + +/* ------------- Begin pc64xe and pcxi memory window stuff -------------- */ + +static inline void pcxi_memwinon(struct board_info *b, unsigned int win) +{ + outb_p(inb((int)b->port) | FEPMEM, (int)b->port); +} + +static inline void pcxi_memwinoff(struct board_info *b, unsigned int win) +{ + outb_p(inb((int)b->port) & ~FEPMEM, (int)b->port); +} + +static inline void pcxi_globalwinon(struct channel *ch) +{ + outb_p(FEPMEM, (int)ch->board->port); +} + +static inline void pcxi_rxwinon(struct channel *ch) +{ + outb_p(FEPMEM, (int)ch->board->port); +} + +static inline void pcxi_txwinon(struct channel *ch) +{ + outb_p(FEPMEM, (int)ch->board->port); +} + +static inline void pcxi_memoff(struct channel *ch) +{ + outb_p(0, (int)ch->board->port); +} + +static inline void pcxi_assertgwinon(struct channel *ch) +{ + epcaassert(inb((int)ch->board->port) & FEPMEM, "Global memory off"); +} + +static inline void pcxi_assertmemoff(struct channel *ch) +{ + epcaassert(!(inb((int)ch->board->port) & FEPMEM), "Memory on"); +} + + +/* ---------------------------------------------------------------------- + Not all of the cards need specific memory windowing routines. Some + cards (Such as PCI) needs no windowing routines at all. We provide + these do nothing routines so that the same code base can be used. + The driver will ALWAYS call a windowing routine if it thinks it needs + to; regardless of the card. However, dependent on the card the routine + may or may not do anything. +---------------------------------------------------------------------------*/ + +static inline void dummy_memwinon(struct board_info *b, unsigned int win) +{ +} + +static inline void dummy_memwinoff(struct board_info *b, unsigned int win) +{ +} + +static inline void dummy_globalwinon(struct channel *ch) +{ +} + +static inline void dummy_rxwinon(struct channel *ch) +{ +} + +static inline void dummy_txwinon(struct channel *ch) +{ +} + +static inline void dummy_memoff(struct channel *ch) +{ +} + +static inline void dummy_assertgwinon(struct channel *ch) +{ +} + +static inline void dummy_assertmemoff(struct channel *ch) +{ +} + +/* ----------------- Begin verifyChannel function ----------------------- */ +static inline struct channel *verifyChannel(register struct tty_struct *tty) +{ /* Begin verifyChannel */ + + /* -------------------------------------------------------------------- + This routine basically provides a sanity check. It insures that + the channel returned is within the proper range of addresses as + well as properly initialized. If some bogus info gets passed in + through tty->driver_data this should catch it. + --------------------------------------------------------------------- */ + + if (tty) + { /* Begin if tty */ + + register struct channel *ch = (struct channel *)tty->driver_data; + + if ((ch >= &digi_channels[0]) && (ch < &digi_channels[nbdevs])) + { + if (ch->magic == EPCA_MAGIC) + return ch; + } + + } /* End if tty */ + + /* Else return a NULL for invalid */ + return NULL; + +} /* End verifyChannel */ + +/* ------------------ Begin pc_sched_event ------------------------- */ + +static inline void pc_sched_event(struct channel *ch, int event) +{ /* Begin pc_sched_event */ + + + /* ---------------------------------------------------------------------- + We call this to schedule interrupt processing on some event. The + kernel sees our request and calls the related routine in OUR driver. + -------------------------------------------------------------------------*/ + + ch->event |= 1 << event; + schedule_work(&ch->tqueue); + + +} /* End pc_sched_event */ + +/* ------------------ Begin epca_error ------------------------- */ + +static void epca_error(int line, char *msg) +{ /* Begin epca_error */ + + printk(KERN_ERR "epca_error (Digi): line = %d %s\n",line,msg); + return; + +} /* End epca_error */ + +/* ------------------ Begin pc_close ------------------------- */ +static void pc_close(struct tty_struct * tty, struct file * filp) +{ /* Begin pc_close */ + + struct channel *ch; + unsigned long flags; + + /* --------------------------------------------------------- + verifyChannel returns the channel from the tty struct + if it is valid. This serves as a sanity check. + ------------------------------------------------------------- */ + + if ((ch = verifyChannel(tty)) != NULL) + { /* Begin if ch != NULL */ + + save_flags(flags); + cli(); + + if (tty_hung_up_p(filp)) + { + restore_flags(flags); + return; + } + + /* Check to see if the channel is open more than once */ + if (ch->count-- > 1) + { /* Begin channel is open more than once */ + + /* ------------------------------------------------------------- + Return without doing anything. Someone might still be using + the channel. + ---------------------------------------------------------------- */ + + restore_flags(flags); + return; + } /* End channel is open more than once */ + + /* Port open only once go ahead with shutdown & reset */ + + if (ch->count < 0) + { + ch->count = 0; + } + + /* --------------------------------------------------------------- + Let the rest of the driver know the channel is being closed. + This becomes important if an open is attempted before close + is finished. + ------------------------------------------------------------------ */ + + ch->asyncflags |= ASYNC_CLOSING; + + tty->closing = 1; + + if (ch->asyncflags & ASYNC_INITIALIZED) + { + /* Setup an event to indicate when the transmit buffer empties */ + setup_empty_event(tty, ch); + tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */ + } + + if (tty->driver->flush_buffer) + tty->driver->flush_buffer(tty); + + tty_ldisc_flush(tty); + shutdown(ch); + tty->closing = 0; + ch->event = 0; + ch->tty = NULL; + + if (ch->blocked_open) + { /* Begin if 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 | + ASYNC_CLOSING); + wake_up_interruptible(&ch->close_wait); + + + restore_flags(flags); + + } /* End if ch != NULL */ + +} /* End pc_close */ + +/* ------------------ Begin shutdown ------------------------- */ + +static void shutdown(struct channel *ch) +{ /* Begin shutdown */ + + unsigned long flags; + struct tty_struct *tty; + volatile struct board_chan *bc; + + if (!(ch->asyncflags & ASYNC_INITIALIZED)) + return; + + save_flags(flags); + cli(); + globalwinon(ch); + + bc = ch->brdchan; + + /* ------------------------------------------------------------------ + In order for an event to be generated on the receipt of data the + idata flag must be set. Since we are shutting down, this is not + necessary clear this flag. + --------------------------------------------------------------------- */ + + if (bc) + bc->idata = 0; + + tty = ch->tty; + + /* ---------------------------------------------------------------- + If we're a modem control device and HUPCL is on, drop RTS & DTR. + ------------------------------------------------------------------ */ + + if (tty->termios->c_cflag & HUPCL) + { + ch->omodem &= ~(ch->m_rts | ch->m_dtr); + fepcmd(ch, SETMODEM, 0, ch->m_dtr | ch->m_rts, 10, 1); + } + + memoff(ch); + + /* ------------------------------------------------------------------ + The channel has officialy been closed. The next time it is opened + it will have to reinitialized. Set a flag to indicate this. + ---------------------------------------------------------------------- */ + + /* Prevent future Digi programmed interrupts from coming active */ + + ch->asyncflags &= ~ASYNC_INITIALIZED; + restore_flags(flags); + +} /* End shutdown */ + +/* ------------------ Begin pc_hangup ------------------------- */ + +static void pc_hangup(struct tty_struct *tty) +{ /* Begin pc_hangup */ + + struct channel *ch; + + /* --------------------------------------------------------- + verifyChannel returns the channel from the tty struct + if it is valid. This serves as a sanity check. + ------------------------------------------------------------- */ + + if ((ch = verifyChannel(tty)) != NULL) + { /* Begin if ch != NULL */ + + unsigned long flags; + + save_flags(flags); + cli(); + if (tty->driver->flush_buffer) + tty->driver->flush_buffer(tty); + tty_ldisc_flush(tty); + shutdown(ch); + + ch->tty = NULL; + ch->event = 0; + ch->count = 0; + restore_flags(flags); + ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_INITIALIZED); + wake_up_interruptible(&ch->open_wait); + + } /* End if ch != NULL */ + +} /* End pc_hangup */ + +/* ------------------ Begin pc_write ------------------------- */ + +static int pc_write(struct tty_struct * tty, + const unsigned char *buf, int bytesAvailable) +{ /* Begin pc_write */ + + register unsigned int head, tail; + register int dataLen; + register int size; + register int amountCopied; + + + struct channel *ch; + unsigned long flags; + int remain; + volatile struct board_chan *bc; + + + /* ---------------------------------------------------------------- + pc_write is primarily called directly by the kernel routine + tty_write (Though it can also be called by put_char) found in + tty_io.c. pc_write is passed a line discipline buffer where + the data to be written out is stored. The line discipline + implementation itself is done at the kernel level and is not + brought into the driver. + ------------------------------------------------------------------- */ + + /* --------------------------------------------------------- + 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; + save_flags(flags); + cli(); + + globalwinon(ch); + + head = bc->tin & (size - 1); + tail = bc->tout; + + if (tail != bc->tout) + tail = bc->tout; + tail &= (size - 1); + + /* If head >= tail, head has not wrapped around. */ + if (head >= tail) + { /* Begin head has not wrapped */ + + /* --------------------------------------------------------------- + remain (much like dataLen above) represents the total amount of + space available on the card for data. Here dataLen represents + the space existing between the head pointer and the end of + buffer. This is important because a memcpy cannot be told to + automatically wrap around when it hits the buffer end. + ------------------------------------------------------------------ */ + + dataLen = size - head; + remain = size - (head - tail) - 1; + + } /* End head has not wrapped */ + else + { /* Begin head has wrapped around */ + + remain = tail - head - 1; + dataLen = remain; + + } /* End head has wrapped around */ + + /* ------------------------------------------------------------------- + Check the space on the card. If we have more data than + space; reduce the amount of data to fit the space. + ---------------------------------------------------------------------- */ + + bytesAvailable = min(remain, bytesAvailable); + + txwinon(ch); + while (bytesAvailable > 0) + { /* Begin while there is data to copy onto card */ + + /* ----------------------------------------------------------------- + If head is not wrapped, the below will make sure the first + data copy fills to the end of card buffer. + ------------------------------------------------------------------- */ + + dataLen = min(bytesAvailable, dataLen); + memcpy(ch->txptr + head, buf, dataLen); + buf += dataLen; + head += dataLen; + amountCopied += dataLen; + bytesAvailable -= dataLen; + + if (head >= size) + { + head = 0; + dataLen = tail; + } + + } /* End while there is data to copy onto card */ + + ch->statusflags |= TXBUSY; + globalwinon(ch); + bc->tin = head; + + if ((ch->statusflags & LOWWAIT) == 0) + { + ch->statusflags |= LOWWAIT; + bc->ilow = 1; + } + memoff(ch); + restore_flags(flags); + + return(amountCopied); + +} /* End pc_write */ + +/* ------------------ Begin pc_put_char ------------------------- */ + +static void pc_put_char(struct tty_struct *tty, unsigned char c) +{ /* Begin pc_put_char */ + + + pc_write(tty, &c, 1); + return; + +} /* End pc_put_char */ + +/* ------------------ Begin pc_write_room ------------------------- */ + +static int pc_write_room(struct tty_struct *tty) +{ /* Begin pc_write_room */ + + int remain; + struct channel *ch; + unsigned long flags; + unsigned int head, tail; + volatile struct board_chan *bc; + + remain = 0; + + /* --------------------------------------------------------- + verifyChannel returns the channel from the tty struct + if it is valid. This serves as a sanity check. + ------------------------------------------------------------- */ + + if ((ch = verifyChannel(tty)) != NULL) + { + save_flags(flags); + cli(); + globalwinon(ch); + + bc = ch->brdchan; + head = bc->tin & (ch->txbufsize - 1); + tail = bc->tout; + + if (tail != bc->tout) + tail = bc->tout; + /* Wrap tail if necessary */ + tail &= (ch->txbufsize - 1); + + if ((remain = tail - head - 1) < 0 ) + remain += ch->txbufsize; + + if (remain && (ch->statusflags & LOWWAIT) == 0) + { + ch->statusflags |= LOWWAIT; + bc->ilow = 1; + } + memoff(ch); + restore_flags(flags); + } + + /* Return how much room is left on card */ + return remain; + +} /* End pc_write_room */ + +/* ------------------ Begin pc_chars_in_buffer ---------------------- */ + +static int pc_chars_in_buffer(struct tty_struct *tty) +{ /* Begin pc_chars_in_buffer */ + + int chars; + unsigned int ctail, head, tail; + int remain; + unsigned long flags; + struct channel *ch; + volatile struct board_chan *bc; + + + /* --------------------------------------------------------- + verifyChannel returns the channel from the tty struct + if it is valid. This serves as a sanity check. + ------------------------------------------------------------- */ + + if ((ch = verifyChannel(tty)) == NULL) + return(0); + + save_flags(flags); + cli(); + globalwinon(ch); + + bc = ch->brdchan; + tail = bc->tout; + head = bc->tin; + ctail = ch->mailbox->cout; + + if (tail == head && ch->mailbox->cin == ctail && bc->tbusy == 0) + chars = 0; + else + { /* Begin if some space on the card has been used */ + + head = bc->tin & (ch->txbufsize - 1); + tail &= (ch->txbufsize - 1); + + /* -------------------------------------------------------------- + The logic here is basically opposite of the above pc_write_room + here we are finding the amount of bytes in the buffer filled. + Not the amount of bytes empty. + ------------------------------------------------------------------- */ + + if ((remain = tail - head - 1) < 0 ) + remain += ch->txbufsize; + + chars = (int)(ch->txbufsize - remain); + + /* ------------------------------------------------------------- + Make it possible to wakeup anything waiting for output + in tty_ioctl.c, etc. + + If not already set. Setup an event to indicate when the + transmit buffer empties + ----------------------------------------------------------------- */ + + if (!(ch->statusflags & EMPTYWAIT)) + setup_empty_event(tty,ch); + + } /* End if some space on the card has been used */ + + memoff(ch); + restore_flags(flags); + + /* Return number of characters residing on card. */ + return(chars); + +} /* End pc_chars_in_buffer */ + +/* ------------------ Begin pc_flush_buffer ---------------------- */ + +static void pc_flush_buffer(struct tty_struct *tty) +{ /* Begin pc_flush_buffer */ + + unsigned int tail; + unsigned long flags; + struct channel *ch; + volatile struct board_chan *bc; + + + /* --------------------------------------------------------- + verifyChannel returns the channel from the tty struct + if it is valid. This serves as a sanity check. + ------------------------------------------------------------- */ + + if ((ch = verifyChannel(tty)) == NULL) + return; + + save_flags(flags); + cli(); + + globalwinon(ch); + + bc = ch->brdchan; + tail = bc->tout; + + /* Have FEP move tout pointer; effectively flushing transmit buffer */ + + fepcmd(ch, STOUT, (unsigned) tail, 0, 0, 0); + + memoff(ch); + restore_flags(flags); + + wake_up_interruptible(&tty->write_wait); + 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. + ------------------------------------------------------------- */ + + if ((ch = verifyChannel(tty)) != NULL) + { + unsigned long flags; + + save_flags(flags); + cli(); + + /* ---------------------------------------------------------------- + If not already set and the transmitter is busy setup an event + to indicate when the transmit empties. + ------------------------------------------------------------------- */ + + if ((ch->statusflags & TXBUSY) && !(ch->statusflags & EMPTYWAIT)) + setup_empty_event(tty,ch); + + restore_flags(flags); + } + +} /* End pc_flush_chars */ + +/* ------------------ Begin block_til_ready ---------------------- */ + +static int block_til_ready(struct tty_struct *tty, + struct file *filp, struct channel *ch) +{ /* Begin block_til_ready */ + + DECLARE_WAITQUEUE(wait,current); + int retval, do_clocal = 0; + unsigned long flags; + + + if (tty_hung_up_p(filp)) + { + if (ch->asyncflags & ASYNC_HUP_NOTIFY) + retval = -EAGAIN; + else + retval = -ERESTARTSYS; + return(retval); + } + + /* ----------------------------------------------------------------- + If the device is in the middle of being closed, then block + until it's done, and then try again. + -------------------------------------------------------------------- */ + if (ch->asyncflags & ASYNC_CLOSING) + { + interruptible_sleep_on(&ch->close_wait); + + if (ch->asyncflags & ASYNC_HUP_NOTIFY) + return -EAGAIN; + else + return -ERESTARTSYS; + } + + if (filp->f_flags & O_NONBLOCK) + { + /* ----------------------------------------------------------------- + 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); + save_flags(flags); + cli(); + + + /* We dec count so that pc_close will know when to free things */ + if (!tty_hung_up_p(filp)) + ch->count--; + + restore_flags(flags); + + ch->blocked_open++; + + while(1) + { /* Begin forever while */ + + set_current_state(TASK_INTERRUPTIBLE); + + if (tty_hung_up_p(filp) || + !(ch->asyncflags & ASYNC_INITIALIZED)) + { + if (ch->asyncflags & ASYNC_HUP_NOTIFY) + retval = -EAGAIN; + else + retval = -ERESTARTSYS; + break; + } + + if (!(ch->asyncflags & ASYNC_CLOSING) && + (do_clocal || (ch->imodem & ch->dcd))) + break; + + if (signal_pending(current)) + { + retval = -ERESTARTSYS; + break; + } + + /* --------------------------------------------------------------- + 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(); + + } /* End forever while */ + + current->state = TASK_RUNNING; + remove_wait_queue(&ch->open_wait, &wait); + cli(); + if (!tty_hung_up_p(filp)) + ch->count++; + restore_flags(flags); + + ch->blocked_open--; + + if (retval) + return retval; + + ch->asyncflags |= ASYNC_NORMAL_ACTIVE; + + return 0; + +} /* End block_til_ready */ + +/* ------------------ Begin pc_open ---------------------- */ + +static int pc_open(struct tty_struct *tty, struct file * filp) +{ /* Begin pc_open */ + + struct channel *ch; + unsigned long flags; + int line, retval, boardnum; + volatile struct board_chan *bc; + volatile unsigned int head; + + line = tty->index; + if (line < 0 || line >= nbdevs) + { + printk(KERN_ERR "<Error> - pc_open : line out of range in pc_open\n"); + tty->driver_data = NULL; + return(-ENODEV); + } + + + ch = &digi_channels[line]; + boardnum = ch->boardnum; + + /* Check status of board configured in system. */ + + /* ----------------------------------------------------------------- + I check to see if the epca_setup routine detected an user error. + It might be better to put this in pc_init, but for the moment it + goes here. + ---------------------------------------------------------------------- */ + + if (invalid_lilo_config) + { + if (setup_error_code & INVALID_BOARD_TYPE) + printk(KERN_ERR "<Error> - pc_open: Invalid board type specified in LILO command\n"); + + if (setup_error_code & INVALID_NUM_PORTS) + printk(KERN_ERR "<Error> - pc_open: Invalid number of ports specified in LILO command\n"); + + if (setup_error_code & INVALID_MEM_BASE) + printk(KERN_ERR "<Error> - pc_open: Invalid board memory address specified in LILO command\n"); + + if (setup_error_code & INVALID_PORT_BASE) + printk(KERN_ERR "<Error> - pc_open: Invalid board port address specified in LILO command\n"); + + if (setup_error_code & INVALID_BOARD_STATUS) + printk(KERN_ERR "<Error> - pc_open: Invalid board status specified in LILO command\n"); + + if (setup_error_code & INVALID_ALTPIN) + printk(KERN_ERR "<Error> - pc_open: Invalid board altpin specified in LILO command\n"); + + tty->driver_data = NULL; /* Mark this device as 'down' */ + return(-ENODEV); + } + + if ((boardnum >= num_cards) || (boards[boardnum].status == DISABLED)) + { + tty->driver_data = NULL; /* Mark this device as 'down' */ + return(-ENODEV); + } + + if (( bc = ch->brdchan) == 0) + { + tty->driver_data = NULL; + return(-ENODEV); + } + + /* ------------------------------------------------------------------ + Every time a channel is opened, increment a counter. This is + necessary because we do not wish to flush and shutdown the channel + until the last app holding the channel open, closes it. + --------------------------------------------------------------------- */ + + ch->count++; + + /* ---------------------------------------------------------------- + Set a kernel structures pointer to our local channel + structure. This way we can get to it when passed only + a tty struct. + ------------------------------------------------------------------ */ + + tty->driver_data = ch; + + /* ---------------------------------------------------------------- + If this is the first time the channel has been opened, initialize + the tty->termios struct otherwise let pc_close handle it. + -------------------------------------------------------------------- */ + + save_flags(flags); + cli(); + + globalwinon(ch); + ch->statusflags = 0; + + /* Save boards current modem status */ + ch->imodem = bc->mstat; + + /* ---------------------------------------------------------------- + Set receive head and tail ptrs to each other. This indicates + no data available to read. + ----------------------------------------------------------------- */ + head = bc->rin; + bc->rout = head; + + /* Set the channels associated tty structure */ + ch->tty = tty; + + /* ----------------------------------------------------------------- + The below routine generally sets up parity, baud, flow control + issues, etc.... It effect both control flags and input flags. + -------------------------------------------------------------------- */ + epcaparam(tty,ch); + + ch->asyncflags |= ASYNC_INITIALIZED; + memoff(ch); + + restore_flags(flags); + + retval = block_til_ready(tty, filp, ch); + if (retval) + { + return retval; + } + + /* ------------------------------------------------------------- + Set this again in case a hangup set it to zero while this + open() was waiting for the line... + --------------------------------------------------------------- */ + ch->tty = tty; + + save_flags(flags); + cli(); + globalwinon(ch); + + /* Enable Digi Data events */ + bc->idata = 1; + + memoff(ch); + restore_flags(flags); + + return 0; + +} /* End pc_open */ + +#ifdef MODULE +static int __init epca_module_init(void) +{ /* Begin init_module */ + + unsigned long flags; + + save_flags(flags); + cli(); + + pc_init(); + + restore_flags(flags); + + return(0); +} + +module_init(epca_module_init); +#endif + +#ifdef ENABLE_PCI +static struct pci_driver epca_driver; +#endif + +#ifdef MODULE +/* -------------------- Begin cleanup_module ---------------------- */ + +static void __exit epca_module_exit(void) +{ + + int count, crd; + struct board_info *bd; + struct channel *ch; + unsigned long flags; + + del_timer_sync(&epca_timer); + + save_flags(flags); + cli(); + + if ((tty_unregister_driver(pc_driver)) || + (tty_unregister_driver(pc_info))) + { + printk(KERN_WARNING "<Error> - DIGI : cleanup_module failed to un-register tty driver\n"); + restore_flags(flags); + return; + } + put_tty_driver(pc_driver); + put_tty_driver(pc_info); + + for (crd = 0; crd < num_cards; crd++) + { /* Begin for each card */ + + bd = &boards[crd]; + + if (!bd) + { /* Begin sanity check */ + printk(KERN_ERR "<Error> - Digi : cleanup_module failed\n"); + return; + } /* End sanity check */ + + ch = card_ptr[crd]; + + for (count = 0; count < bd->numports; count++, ch++) + { /* Begin for each port */ + + if (ch) + { + if (ch->tty) + tty_hangup(ch->tty); + kfree(ch->tmp_buf); + } + + } /* End for each port */ + } /* End for each card */ + +#ifdef ENABLE_PCI + pci_unregister_driver (&epca_driver); +#endif + + restore_flags(flags); + +} +module_exit(epca_module_exit); +#endif /* MODULE */ + +static struct tty_operations pc_ops = { + .open = pc_open, + .close = pc_close, + .write = pc_write, + .write_room = pc_write_room, + .flush_buffer = pc_flush_buffer, + .chars_in_buffer = pc_chars_in_buffer, + .flush_chars = pc_flush_chars, + .put_char = pc_put_char, + .ioctl = pc_ioctl, + .set_termios = pc_set_termios, + .stop = pc_stop, + .start = pc_start, + .throttle = pc_throttle, + .unthrottle = pc_unthrottle, + .hangup = pc_hangup, +}; + +static int info_open(struct tty_struct *tty, struct file * filp) +{ + return 0; +} + +static struct tty_operations info_ops = { + .open = info_open, + .ioctl = info_ioctl, +}; + +/* ------------------ Begin pc_init ---------------------- */ + +int __init pc_init(void) +{ /* Begin pc_init */ + + /* ---------------------------------------------------------------- + pc_init is called by the operating system during boot up prior to + any open calls being made. In the older versions of Linux (Prior + to 2.0.0) an entry is made into tty_io.c. A pointer to the last + memory location (from kernel space) used (kmem_start) is passed + to pc_init. It is pc_inits responsibility to modify this value + for any memory that the Digi driver might need and then return + this value to the operating system. For example if the driver + wishes to allocate 1K of kernel memory, pc_init would return + (kmem_start + 1024). This memory (Between kmem_start and kmem_start + + 1024) would then be available for use exclusively by the driver. + In this case our driver does not allocate any of this kernel + memory. + ------------------------------------------------------------------*/ + + ulong flags; + int crd; + struct board_info *bd; + unsigned char board_id = 0; + +#ifdef ENABLE_PCI + int pci_boards_found, pci_count; + + pci_count = 0; +#endif /* ENABLE_PCI */ + + pc_driver = alloc_tty_driver(MAX_ALLOC); + if (!pc_driver) + return -ENOMEM; + + pc_info = alloc_tty_driver(MAX_ALLOC); + if (!pc_info) { + put_tty_driver(pc_driver); + return -ENOMEM; + } + + /* ----------------------------------------------------------------------- + If epca_setup has not been ran by LILO set num_cards to defaults; copy + board structure defined by digiConfig into drivers board structure. + Note : If LILO has ran epca_setup then epca_setup will handle defining + num_cards as well as copying the data into the board structure. + -------------------------------------------------------------------------- */ + if (!liloconfig) + { /* Begin driver has been configured via. epcaconfig */ + + nbdevs = NBDEVS; + num_cards = NUMCARDS; + memcpy((void *)&boards, (void *)&static_boards, + (sizeof(struct board_info) * NUMCARDS)); + } /* End driver has been configured via. epcaconfig */ + + /* ----------------------------------------------------------------- + Note : If lilo was used to configure the driver and the + ignore epcaconfig option was choosen (digiepca=2) then + nbdevs and num_cards will equal 0 at this point. This is + okay; PCI cards will still be picked up if detected. + --------------------------------------------------------------------- */ + + /* ----------------------------------------------------------- + Set up interrupt, we will worry about memory allocation in + post_fep_init. + --------------------------------------------------------------- */ + + + printk(KERN_INFO "DIGI epca driver version %s loaded.\n",VERSION); + +#ifdef ENABLE_PCI + + /* ------------------------------------------------------------------ + NOTE : This code assumes that the number of ports found in + the boards array is correct. This could be wrong if + the card in question is PCI (And therefore has no ports + entry in the boards structure.) The rest of the + information will be valid for PCI because the 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.) + + --------------------------------------------------------------------- */ + + pci_boards_found = 0; + if(num_cards < MAXBOARDS) + pci_boards_found += init_PCI(); + num_cards += pci_boards_found; + +#endif /* ENABLE_PCI */ + + pc_driver->owner = THIS_MODULE; + pc_driver->name = "ttyD"; + pc_driver->devfs_name = "tts/D"; + pc_driver->major = DIGI_MAJOR; + pc_driver->minor_start = 0; + pc_driver->type = TTY_DRIVER_TYPE_SERIAL; + pc_driver->subtype = SERIAL_TYPE_NORMAL; + pc_driver->init_termios = tty_std_termios; + pc_driver->init_termios.c_iflag = 0; + pc_driver->init_termios.c_oflag = 0; + pc_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; + pc_driver->init_termios.c_lflag = 0; + pc_driver->flags = TTY_DRIVER_REAL_RAW; + tty_set_operations(pc_driver, &pc_ops); + + pc_info->owner = THIS_MODULE; + pc_info->name = "digi_ctl"; + pc_info->major = DIGIINFOMAJOR; + pc_info->minor_start = 0; + pc_info->type = TTY_DRIVER_TYPE_SERIAL; + pc_info->subtype = SERIAL_TYPE_INFO; + pc_info->init_termios = tty_std_termios; + pc_info->init_termios.c_iflag = 0; + pc_info->init_termios.c_oflag = 0; + pc_info->init_termios.c_lflag = 0; + pc_info->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL; + pc_info->flags = TTY_DRIVER_REAL_RAW; + tty_set_operations(pc_info, &info_ops); + + + save_flags(flags); + cli(); + + for (crd = 0; crd < num_cards; crd++) + { /* Begin for each card */ + + /* ------------------------------------------------------------------ + This is where the appropriate memory handlers for the hardware is + set. Everything at runtime blindly jumps through these vectors. + ---------------------------------------------------------------------- */ + + /* defined in epcaconfig.h */ + bd = &boards[crd]; + + switch (bd->type) + { /* Begin switch on bd->type {board type} */ + case PCXEM: + case EISAXEM: + bd->memwinon = pcxem_memwinon ; + bd->memwinoff = pcxem_memwinoff ; + bd->globalwinon = pcxem_globalwinon ; + bd->txwinon = pcxem_txwinon ; + bd->rxwinon = pcxem_rxwinon ; + bd->memoff = pcxem_memoff ; + bd->assertgwinon = dummy_assertgwinon; + bd->assertmemoff = dummy_assertmemoff; + break; + + case PCIXEM: + case PCIXRJ: + case PCIXR: + bd->memwinon = dummy_memwinon; + bd->memwinoff = dummy_memwinoff; + bd->globalwinon = dummy_globalwinon; + bd->txwinon = dummy_txwinon; + bd->rxwinon = dummy_rxwinon; + bd->memoff = dummy_memoff; + bd->assertgwinon = dummy_assertgwinon; + bd->assertmemoff = dummy_assertmemoff; + break; + + case PCXE: + case PCXEVE: + + bd->memwinon = pcxe_memwinon; + bd->memwinoff = pcxe_memwinoff; + bd->globalwinon = pcxe_globalwinon; + bd->txwinon = pcxe_txwinon; + bd->rxwinon = pcxe_rxwinon; + bd->memoff = pcxe_memoff; + bd->assertgwinon = dummy_assertgwinon; + bd->assertmemoff = dummy_assertmemoff; + break; + + case PCXI: + case PC64XE: + + bd->memwinon = pcxi_memwinon; + bd->memwinoff = pcxi_memwinoff; + bd->globalwinon = pcxi_globalwinon; + bd->txwinon = pcxi_txwinon; + bd->rxwinon = pcxi_rxwinon; + bd->memoff = pcxi_memoff; + bd->assertgwinon = pcxi_assertgwinon; + bd->assertmemoff = pcxi_assertmemoff; + break; + + default: + break; + + } /* End switch on bd->type */ + + /* --------------------------------------------------------------- + Some cards need a memory segment to be defined for use in + transmit and receive windowing operations. These boards + are listed in the below switch. In the case of the XI the + amount of memory on the board is variable so the memory_seg + is also variable. This code determines what they segment + should be. + ----------------------------------------------------------------- */ + + switch (bd->type) + { /* Begin switch on bd->type {board type} */ + + case PCXE: + case PCXEVE: + case PC64XE: + bd->memory_seg = 0xf000; + break; + + case PCXI: + board_id = inb((int)bd->port); + if ((board_id & 0x1) == 0x1) + { /* Begin 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; + + } /* End it is an XI card */ + else + { + printk(KERN_ERR "<Error> - Board at 0x%x doesn't appear to be an XI\n",(int)bd->port); + } + break; + + } /* End switch on bd->type */ + + } /* End for each card */ + + if (tty_register_driver(pc_driver)) + panic("Couldn't register Digi PC/ driver"); + + if (tty_register_driver(pc_info)) + panic("Couldn't register Digi PC/ info "); + + /* ------------------------------------------------------------------- + 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); + + restore_flags(flags); + + return 0; + +} /* End pc_init */ + +/* ------------------ Begin post_fep_init ---------------------- */ + +static void post_fep_init(unsigned int crd) +{ /* Begin post_fep_init */ + + int i; + unchar *memaddr; + volatile struct global_data *gd; + struct board_info *bd; + volatile struct board_chan *bc; + struct channel *ch; + int shrinkmem = 0, lowwater ; + + /* ------------------------------------------------------------- + This call is made by the user via. the ioctl call DIGI_INIT. + It is 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) /* If the board in question is PCI */ + { /* Begin get PCI number of ports */ + + /* -------------------------------------------------------------------- + Below we use XEMPORTS as a memory offset regardless of which PCI + card it is. This is because all of the supported PCI cards have + the same memory offset for the channel data. This will have to be + changed if we ever develop a PCI/XE card. NOTE : The FEP manual + states that the port offset is 0xC22 as opposed to 0xC02. This is + only true for PC/XE, and PC/XI cards; not for the XEM, or CX series. + On the PCI cards the number of ports is determined by reading a + ID PROM located in the box attached to the card. The card can then + determine the index the id to determine the number of ports available. + (FYI - The id should be located at 0x1ac (And may use up to 4 bytes + if the box in question is a XEM or CX)). + ------------------------------------------------------------------------ */ + + bd->numports = (unsigned short)*(unsigned char *)bus_to_virt((unsigned long) + (bd->re_map_membase + XEMPORTS)); + + + epcaassert(bd->numports <= 64,"PCI returned a invalid number of ports"); + nbdevs += (bd->numports); + + } /* End get PCI number of ports */ + + if (crd != 0) + card_ptr[crd] = card_ptr[crd-1] + boards[crd-1].numports; + else + card_ptr[crd] = &digi_channels[crd]; /* <- For card 0 only */ + + ch = card_ptr[crd]; + + + epcaassert(ch <= &digi_channels[nbdevs - 1], "ch out of range"); + + memaddr = (unchar *)bd->re_map_membase; + + /* + The below command is necessary because newer kernels (2.1.x and + up) do not have a 1:1 virtual to physical mapping. The below + call adjust for that. + */ + + memaddr = (unsigned char *)bus_to_virt((unsigned long)memaddr); + + /* ----------------------------------------------------------------- + The below assignment will set bc to point at the BEGINING of + the cards channel structures. For 1 card there will be between + 8 and 64 of these structures. + -------------------------------------------------------------------- */ + + bc = (volatile struct board_chan *)((ulong)memaddr + CHANSTRUCT); + + /* ------------------------------------------------------------------- + The below assignment will set gd to point at the BEGINING of + global memory address 0xc00. The first data in that global + memory actually starts at address 0xc1a. The command in + pointer begins at 0xd10. + ---------------------------------------------------------------------- */ + + gd = (volatile struct global_data *)((ulong)memaddr + GLOBAL); + + /* -------------------------------------------------------------------- + XEPORTS (address 0xc22) points at the number of channels the + card supports. (For 64XE, XI, XEM, and XR use 0xc02) + ----------------------------------------------------------------------- */ + + if (((bd->type == PCXEVE) | (bd->type == PCXE)) && + (*(ushort *)((ulong)memaddr + XEPORTS) < 3)) + shrinkmem = 1; + if (bd->type < PCIXEM) + if (!request_region((int)bd->port, 4, board_desc[bd->type])) + 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 */ + + ch->brdchan = bc; + ch->mailbox = gd; + INIT_WORK(&ch->tqueue, do_softint, ch); + ch->board = &boards[crd]; + + switch (bd->type) + { /* Begin switch bd->type */ + + /* ---------------------------------------------------------------- + Since some of the boards use different bitmaps for their + control signals we cannot hard code these values and retain + portability. We virtualize this data here. + ------------------------------------------------------------------- */ + case EISAXEM: + case PCXEM: + case PCIXEM: + case PCIXRJ: + case PCIXR: + ch->m_rts = 0x02 ; + ch->m_dcd = 0x80 ; + ch->m_dsr = 0x20 ; + ch->m_cts = 0x10 ; + ch->m_ri = 0x40 ; + ch->m_dtr = 0x01 ; + break; + + case PCXE: + case PCXEVE: + case PCXI: + case PC64XE: + ch->m_rts = 0x02 ; + ch->m_dcd = 0x08 ; + ch->m_dsr = 0x10 ; + ch->m_cts = 0x20 ; + ch->m_ri = 0x40 ; + ch->m_dtr = 0x80 ; + break; + + } /* End switch bd->type */ + + if (boards[crd].altpin) + { + ch->dsr = ch->m_dcd; + ch->dcd = ch->m_dsr; + ch->digiext.digi_flags |= DIGI_ALTPIN; + } + else + { + ch->dcd = ch->m_dcd; + ch->dsr = ch->m_dsr; + } + + ch->boardnum = crd; + ch->channelnum = i; + ch->magic = EPCA_MAGIC; + ch->tty = NULL; + + if (shrinkmem) + { + fepcmd(ch, SETBUFFER, 32, 0, 0, 0); + shrinkmem = 0; + } + + switch (bd->type) + { /* Begin switch bd->type */ + + case PCIXEM: + case PCIXRJ: + case PCIXR: + /* Cover all the 2MEG cards */ + ch->txptr = memaddr + (((bc->tseg) << 4) & 0x1fffff); + ch->rxptr = memaddr + (((bc->rseg) << 4) & 0x1fffff); + ch->txwin = FEPWIN | ((bc->tseg) >> 11); + ch->rxwin = FEPWIN | ((bc->rseg) >> 11); + break; + + case PCXEM: + case EISAXEM: + /* Cover all the 32K windowed cards */ + /* Mask equal to window size - 1 */ + ch->txptr = memaddr + (((bc->tseg) << 4) & 0x7fff); + ch->rxptr = memaddr + (((bc->rseg) << 4) & 0x7fff); + ch->txwin = FEPWIN | ((bc->tseg) >> 11); + ch->rxwin = FEPWIN | ((bc->rseg) >> 11); + break; + + case PCXEVE: + case PCXE: + ch->txptr = memaddr + (((bc->tseg - bd->memory_seg) << 4) & 0x1fff); + ch->txwin = FEPWIN | ((bc->tseg - bd->memory_seg) >> 9); + ch->rxptr = memaddr + (((bc->rseg - bd->memory_seg) << 4) & 0x1fff); + ch->rxwin = FEPWIN | ((bc->rseg - bd->memory_seg) >>9 ); + break; + + case PCXI: + case PC64XE: + ch->txptr = memaddr + ((bc->tseg - bd->memory_seg) << 4); + ch->rxptr = memaddr + ((bc->rseg - bd->memory_seg) << 4); + ch->txwin = ch->rxwin = 0; + break; + + } /* End switch bd->type */ + + ch->txbufhead = 0; + ch->txbufsize = bc->tmax + 1; + + ch->rxbufhead = 0; + ch->rxbufsize = bc->rmax + 1; + + lowwater = ch->txbufsize >= 2000 ? 1024 : (ch->txbufsize / 2); + + /* Set transmitter low water mark */ + fepcmd(ch, STXLWATER, lowwater, 0, 10, 0); + + /* Set receiver low water mark */ + + fepcmd(ch, SRXLWATER, (ch->rxbufsize / 4), 0, 10, 0); + + /* Set receiver high water mark */ + + fepcmd(ch, SRXHWATER, (3 * ch->rxbufsize / 4), 0, 10, 0); + + bc->edelay = 100; + bc->idata = 1; + + ch->startc = bc->startc; + ch->stopc = bc->stopc; + ch->startca = bc->startca; + ch->stopca = bc->stopca; + + ch->fepcflag = 0; + ch->fepiflag = 0; + ch->fepoflag = 0; + ch->fepstartc = 0; + ch->fepstopc = 0; + ch->fepstartca = 0; + ch->fepstopca = 0; + + ch->close_delay = 50; + ch->count = 0; + ch->blocked_open = 0; + init_waitqueue_head(&ch->open_wait); + init_waitqueue_head(&ch->close_wait); + ch->tmp_buf = kmalloc(ch->txbufsize,GFP_KERNEL); + if (!(ch->tmp_buf)) + { + printk(KERN_ERR "POST FEP INIT : kmalloc failed for port 0x%x\n",i); + release_region((int)bd->port, 4); + while(i-- > 0) + kfree((ch--)->tmp_buf); + return; + } + else + memset((void *)ch->tmp_buf,0,ch->txbufsize); + } /* End for each port */ + + printk(KERN_INFO + "Digi PC/Xx Driver V%s: %s I/O = 0x%lx Mem = 0x%lx Ports = %d\n", + VERSION, board_desc[bd->type], (long)bd->port, (long)bd->membase, bd->numports); + sprintf(mesg, + "Digi PC/Xx Driver V%s: %s I/O = 0x%lx Mem = 0x%lx Ports = %d\n", + VERSION, board_desc[bd->type], (long)bd->port, (long)bd->membase, bd->numports); + console_print(mesg); + + memwinoff(bd, 0); + +} /* End post_fep_init */ + +/* --------------------- Begin epcapoll ------------------------ */ + +static void epcapoll(unsigned long ignored) +{ /* Begin epcapoll */ + + unsigned long flags; + int crd; + volatile unsigned int head, tail; + struct channel *ch; + struct board_info *bd; + + /* ------------------------------------------------------------------- + This routine is called upon every timer interrupt. Even though + the Digi series cards are capable of generating 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. + ----------------------------------------------------------------------- */ + + save_flags(flags); + cli(); + + for (crd = 0; crd < num_cards; crd++) + { /* Begin for each card */ + + bd = &boards[crd]; + ch = card_ptr[crd]; + + if ((bd->status == DISABLED) || digi_poller_inhibited) + continue; /* Begin loop next interation */ + + /* ----------------------------------------------------------- + assertmemoff is not needed here; indeed it is an empty subroutine. + It is being kept because future boards may need this as well as + some legacy boards. + ---------------------------------------------------------------- */ + + assertmemoff(ch); + + globalwinon(ch); + + /* --------------------------------------------------------------- + In this case head and tail actually refer to the event queue not + the transmit or receive queue. + ------------------------------------------------------------------- */ + + head = ch->mailbox->ein; + tail = ch->mailbox->eout; + + /* If head isn't equal to tail we have an event */ + + if (head != tail) + doevent(crd); + + memoff(ch); + + } /* End for each card */ + + mod_timer(&epca_timer, jiffies + (HZ / 25)); + + restore_flags(flags); +} /* End epcapoll */ + +/* --------------------- Begin doevent ------------------------ */ + +static void doevent(int crd) +{ /* Begin doevent */ + + volatile unchar *eventbuf; + struct channel *ch, *chan0; + static struct tty_struct *tty; + volatile struct board_info *bd; + volatile struct board_chan *bc; + register volatile unsigned int tail, head; + register int event, channel; + register int mstat, lstat; + + /* ------------------------------------------------------------------- + This subroutine is called by epcapoll when an event is detected + in the event queue. This routine responds to those events. + --------------------------------------------------------------------- */ + + bd = &boards[crd]; + + chan0 = card_ptr[crd]; + epcaassert(chan0 <= &digi_channels[nbdevs - 1], "ch out of range"); + + assertgwinon(chan0); + + while ((tail = chan0->mailbox->eout) != (head = chan0->mailbox->ein)) + { /* Begin while something in event queue */ + + assertgwinon(chan0); + + eventbuf = (volatile unchar *)bus_to_virt((ulong)(bd->re_map_membase + tail + ISTART)); + + /* Get the channel the event occurred on */ + channel = eventbuf[0]; + + /* Get the actual event code that occurred */ + event = eventbuf[1]; + + /* ---------------------------------------------------------------- + The two assignments below get the current modem status (mstat) + and the previous modem status (lstat). These are useful becuase + an event could signal a change in modem signals itself. + ------------------------------------------------------------------- */ + + mstat = eventbuf[2]; + lstat = eventbuf[3]; + + ch = chan0 + channel; + + if ((unsigned)channel >= bd->numports || !ch) + { + if (channel >= bd->numports) + ch = chan0; + bc = ch->brdchan; + goto next; + } + + if ((bc = ch->brdchan) == NULL) + goto next; + + if (event & DATA_IND) + { /* Begin DATA_IND */ + + receive_data(ch); + assertgwinon(ch); + + } /* End DATA_IND */ + /* else *//* Fix for DCD transition missed bug */ + if (event & MODEMCHG_IND) + { /* Begin MODEMCHG_IND */ + + /* A modem signal change has been indicated */ + + ch->imodem = mstat; + + if (ch->asyncflags & ASYNC_CHECK_CD) + { + if (mstat & ch->dcd) /* We are now receiving dcd */ + wake_up_interruptible(&ch->open_wait); + else + pc_sched_event(ch, EPCA_EVENT_HANGUP); /* No dcd; hangup */ + } + + } /* End MODEMCHG_IND */ + + tty = ch->tty; + if (tty) + { /* Begin if valid tty */ + + if (event & BREAK_IND) + { /* Begin if BREAK_IND */ + + /* A break has been indicated */ + + tty->flip.count++; + *tty->flip.flag_buf_ptr++ = TTY_BREAK; + + *tty->flip.char_buf_ptr++ = 0; + + tty_schedule_flip(tty); + + } /* End if BREAK_IND */ + else + if (event & LOWTX_IND) + { /* Begin LOWTX_IND */ + + if (ch->statusflags & LOWWAIT) + { /* Begin if LOWWAIT */ + + ch->statusflags &= ~LOWWAIT; + tty_wakeup(tty); + wake_up_interruptible(&tty->write_wait); + + } /* End if LOWWAIT */ + + } /* End LOWTX_IND */ + else + if (event & EMPTYTX_IND) + { /* Begin EMPTYTX_IND */ + + /* This event is generated by setup_empty_event */ + + ch->statusflags &= ~TXBUSY; + if (ch->statusflags & EMPTYWAIT) + { /* Begin if EMPTYWAIT */ + + ch->statusflags &= ~EMPTYWAIT; + tty_wakeup(tty); + + wake_up_interruptible(&tty->write_wait); + + } /* End if EMPTYWAIT */ + + } /* End EMPTYTX_IND */ + + } /* End if valid tty */ + + + next: + globalwinon(ch); + + if (!bc) + printk(KERN_ERR "<Error> - bc == NULL in doevent!\n"); + else + bc->idata = 1; + + chan0->mailbox->eout = (tail + 4) & (IMAX - ISTART - 4); + globalwinon(chan0); + + } /* End while something in event queue */ + +} /* End doevent */ + +/* --------------------- Begin fepcmd ------------------------ */ + +static void fepcmd(struct channel *ch, int cmd, int word_or_byte, + int byte2, int ncmds, int bytecmd) +{ /* Begin fepcmd */ + + unchar *memaddr; + unsigned int head, cmdTail, cmdStart, cmdMax; + long count; + int n; + + /* This is the routine in which commands may be passed to the card. */ + + if (ch->board->status == DISABLED) + { + return; + } + + assertgwinon(ch); + + /* Remember head (As well as max) is just an offset not a base addr */ + head = ch->mailbox->cin; + + /* cmdStart is a base address */ + cmdStart = ch->mailbox->cstart; + + /* ------------------------------------------------------------------ + We do the addition below because we do not want a max pointer + relative to cmdStart. We want a max pointer that points at the + physical end of the command queue. + -------------------------------------------------------------------- */ + + cmdMax = (cmdStart + 4 + (ch->mailbox->cmax)); + + memaddr = ch->board->re_map_membase; + + /* + The below command is necessary because newer kernels (2.1.x and + up) do not have a 1:1 virtual to physical mapping. The below + call adjust for that. + */ + + memaddr = (unsigned char *)bus_to_virt((unsigned long)memaddr); + + if (head >= (cmdMax - cmdStart) || (head & 03)) + { + printk(KERN_ERR "line %d: Out of range, cmd = %x, head = %x\n", __LINE__, + cmd, head); + printk(KERN_ERR "line %d: Out of range, cmdMax = %x, cmdStart = %x\n", __LINE__, + cmdMax, cmdStart); + return; + } + + if (bytecmd) + { + *(volatile unchar *)(memaddr + head + cmdStart + 0) = (unchar)cmd; + + *(volatile unchar *)(memaddr + head + cmdStart + 1) = (unchar)ch->channelnum; + /* Below word_or_byte is bits to set */ + *(volatile unchar *)(memaddr + head + cmdStart + 2) = (unchar)word_or_byte; + /* Below byte2 is bits to reset */ + *(volatile unchar *)(memaddr + head + cmdStart + 3) = (unchar)byte2; + + } + else + { + *(volatile unchar *)(memaddr + head + cmdStart + 0) = (unchar)cmd; + *(volatile unchar *)(memaddr + head + cmdStart + 1) = (unchar)ch->channelnum; + *(volatile ushort*)(memaddr + head + cmdStart + 2) = (ushort)word_or_byte; + } + + head = (head + 4) & (cmdMax - cmdStart - 4); + ch->mailbox->cin = head; + + count = FEPTIMEOUT; + + for (;;) + { /* Begin forever loop */ + + count--; + if (count == 0) + { + printk(KERN_ERR "<Error> - Fep not responding in fepcmd()\n"); + return; + } + + head = ch->mailbox->cin; + cmdTail = ch->mailbox->cout; + + n = (head - cmdTail) & (cmdMax - cmdStart - 4); + + /* ---------------------------------------------------------- + Basically this will break when the FEP acknowledges the + command by incrementing cmdTail (Making it equal to head). + ------------------------------------------------------------- */ + + if (n <= ncmds * (sizeof(short) * 4)) + break; /* Well nearly forever :-) */ + + } /* End forever loop */ + +} /* End fepcmd */ + +/* --------------------------------------------------------------------- + Digi products use fields in their channels structures that are very + similar to the c_cflag and c_iflag fields typically found in UNIX + termios structures. The below three routines allow mappings + between these hardware "flags" and their respective Linux flags. +------------------------------------------------------------------------- */ + +/* --------------------- Begin termios2digi_h -------------------- */ + +static unsigned termios2digi_h(struct channel *ch, unsigned cflag) +{ /* Begin termios2digi_h */ + + unsigned res = 0; + + if (cflag & CRTSCTS) + { + ch->digiext.digi_flags |= (RTSPACE | CTSPACE); + res |= ((ch->m_cts) | (ch->m_rts)); + } + + if (ch->digiext.digi_flags & RTSPACE) + res |= ch->m_rts; + + if (ch->digiext.digi_flags & DTRPACE) + res |= ch->m_dtr; + + if (ch->digiext.digi_flags & CTSPACE) + res |= ch->m_cts; + + if (ch->digiext.digi_flags & DSRPACE) + res |= ch->dsr; + + if (ch->digiext.digi_flags & DCDPACE) + res |= ch->dcd; + + if (res & (ch->m_rts)) + ch->digiext.digi_flags |= RTSPACE; + + if (res & (ch->m_cts)) + ch->digiext.digi_flags |= CTSPACE; + + return res; + +} /* End termios2digi_h */ + +/* --------------------- Begin termios2digi_i -------------------- */ +static unsigned termios2digi_i(struct channel *ch, unsigned iflag) +{ /* Begin termios2digi_i */ + + unsigned res = iflag & (IGNBRK | BRKINT | IGNPAR | PARMRK | + INPCK | ISTRIP|IXON|IXANY|IXOFF); + + if (ch->digiext.digi_flags & DIGI_AIXON) + res |= IAIXON; + return res; + +} /* End termios2digi_i */ + +/* --------------------- Begin termios2digi_c -------------------- */ + +static unsigned termios2digi_c(struct channel *ch, unsigned cflag) +{ /* Begin termios2digi_c */ + + unsigned res = 0; + +#ifdef SPEED_HACK + /* CL: HACK to force 115200 at 38400 and 57600 at 19200 Baud */ + if ((cflag & CBAUD)== B38400) cflag=cflag - B38400 + B115200; + if ((cflag & CBAUD)== B19200) cflag=cflag - B19200 + B57600; +#endif /* SPEED_HACK */ + + if (cflag & CBAUDEX) + { /* Begin detected CBAUDEX */ + + ch->digiext.digi_flags |= DIGI_FAST; + + /* ------------------------------------------------------------- + HUPCL bit is used by FEP to indicate fast baud + table is to be used. + ----------------------------------------------------------------- */ + + res |= FEP_HUPCL; + + } /* End detected CBAUDEX */ + else ch->digiext.digi_flags &= ~DIGI_FAST; + + /* ------------------------------------------------------------------- + CBAUD has bit position 0x1000 set these days to indicate Linux + baud rate remap. Digi hardware can't handle the bit assignment. + (We use a different bit assignment for high speed.). Clear this + bit out. + ---------------------------------------------------------------------- */ + res |= cflag & ((CBAUD ^ CBAUDEX) | PARODD | PARENB | CSTOPB | CSIZE); + + /* ------------------------------------------------------------- + This gets a little confusing. The Digi cards have their own + representation of c_cflags controling baud rate. For the most + part this is identical to the Linux implementation. However; + Digi supports one rate (76800) that Linux doesn't. This means + that the c_cflag entry that would normally mean 76800 for Digi + actually means 115200 under Linux. Without the below mapping, + a stty 115200 would only drive the board at 76800. Since + the rate 230400 is also found after 76800, the same problem afflicts + us when we choose a rate of 230400. Without the below modificiation + stty 230400 would actually give us 115200. + + There are two additional differences. The Linux value for CLOCAL + (0x800; 0004000) has no meaning to the Digi hardware. Also in + later releases of Linux; the CBAUD define has CBAUDEX (0x1000; + 0010000) ored into it (CBAUD = 0x100f as opposed to 0xf). CBAUDEX + should be checked for a screened out prior to termios2digi_c + returning. Since CLOCAL isn't used by the board this can be + ignored as long as the returned value is used only by Digi hardware. + ----------------------------------------------------------------- */ + + if (cflag & CBAUDEX) + { + /* ------------------------------------------------------------- + The below code is trying to guarantee that only baud rates + 115200 and 230400 are remapped. We use exclusive or because + the various baud rates share common bit positions and therefore + can't be tested for easily. + ----------------------------------------------------------------- */ + + + if ((!((cflag & 0x7) ^ (B115200 & ~CBAUDEX))) || + (!((cflag & 0x7) ^ (B230400 & ~CBAUDEX)))) + { + res += 1; + } + } + + return res; + +} /* End termios2digi_c */ + +/* --------------------- Begin epcaparam ----------------------- */ + +static void epcaparam(struct tty_struct *tty, struct channel *ch) +{ /* Begin epcaparam */ + + unsigned int cmdHead; + struct termios *ts; + volatile struct board_chan *bc; + unsigned mval, hflow, cflag, iflag; + + bc = ch->brdchan; + epcaassert(bc !=0, "bc out of range"); + + assertgwinon(ch); + + ts = tty->termios; + + if ((ts->c_cflag & CBAUD) == 0) + { /* Begin CBAUD detected */ + + cmdHead = bc->rin; + bc->rout = cmdHead; + cmdHead = bc->tin; + + /* Changing baud in mid-stream transmission can be wonderful */ + /* --------------------------------------------------------------- + Flush current transmit buffer by setting cmdTail pointer (tout) + to cmdHead pointer (tin). Hopefully the transmit buffer is empty. + ----------------------------------------------------------------- */ + + fepcmd(ch, STOUT, (unsigned) cmdHead, 0, 0, 0); + mval = 0; + + } /* End CBAUD detected */ + else + { /* Begin CBAUD not detected */ + + /* ------------------------------------------------------------------- + c_cflags have changed but that change had nothing to do with BAUD. + Propagate the change to the card. + ---------------------------------------------------------------------- */ + + cflag = termios2digi_c(ch, ts->c_cflag); + + if (cflag != ch->fepcflag) + { + ch->fepcflag = cflag; + /* Set baud rate, char size, stop bits, parity */ + fepcmd(ch, SETCTRLFLAGS, (unsigned) cflag, 0, 0, 0); + } + + + /* ---------------------------------------------------------------- + If the user has not forced CLOCAL and if the device is not a + CALLOUT device (Which is always CLOCAL) we set flags such that + the driver will wait on carrier detect. + ------------------------------------------------------------------- */ + + if (ts->c_cflag & CLOCAL) + { /* Begin it is a cud device or a ttyD device with CLOCAL on */ + ch->asyncflags &= ~ASYNC_CHECK_CD; + } /* End it is a cud device or a ttyD device with CLOCAL on */ + else + { /* Begin it is a ttyD device */ + ch->asyncflags |= ASYNC_CHECK_CD; + } /* End it is a ttyD device */ + + mval = ch->m_dtr | ch->m_rts; + + } /* End CBAUD not detected */ + + iflag = termios2digi_i(ch, ts->c_iflag); + + /* Check input mode flags */ + + if (iflag != ch->fepiflag) + { + ch->fepiflag = iflag; + + /* --------------------------------------------------------------- + Command sets channels iflag structure on the board. Such things + as input soft flow control, 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. + ------------------------------------------------------------------- */ + bc->mint = ch->dcd; + + if ((ts->c_cflag & CLOCAL) || (ch->digiext.digi_flags & DIGI_FORCEDCD)) + if (ch->digiext.digi_flags & DIGI_FORCEDCD) + bc->mint = 0; + + ch->imodem = bc->mstat; + + hflow = termios2digi_h(ch, ts->c_cflag); + + if (hflow != ch->hflow) + { + ch->hflow = hflow; + + /* -------------------------------------------------------------- + Hard flow control has been selected but the board is not + using it. Activate hard flow control now. + ----------------------------------------------------------------- */ + + fepcmd(ch, SETHFLOW, hflow, 0xff, 0, 1); + } + + + mval ^= ch->modemfake & (mval ^ ch->modem); + + if (ch->omodem ^ mval) + { + ch->omodem = mval; + + /* -------------------------------------------------------------- + The below command sets the DTR and RTS mstat structure. If + hard flow control is NOT active these changes will drive the + output of the actual DTR and RTS lines. If hard flow control + is active, the changes will be saved in the mstat structure and + only asserted when hard flow control is turned off. + ----------------------------------------------------------------- */ + + /* First reset DTR & RTS; then set them */ + fepcmd(ch, SETMODEM, 0, ((ch->m_dtr)|(ch->m_rts)), 0, 1); + fepcmd(ch, SETMODEM, mval, 0, 0, 1); + + } + + if (ch->startc != ch->fepstartc || ch->stopc != ch->fepstopc) + { + ch->fepstartc = ch->startc; + ch->fepstopc = ch->stopc; + + /* ------------------------------------------------------------ + The XON / XOFF characters have changed; 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. + ------------------------------------------------------------------ */ + + fepcmd(ch, SAUXONOFFC, ch->fepstartca, ch->fepstopca, 0, 1); + } + +} /* End epcaparam */ + +/* --------------------- Begin receive_data ----------------------- */ + +static void receive_data(struct channel *ch) +{ /* Begin receive_data */ + + unchar *rptr; + struct termios *ts = NULL; + struct tty_struct *tty; + volatile struct board_chan *bc; + register int dataToRead, wrapgap, bytesAvailable; + register unsigned int tail, head; + unsigned int wrapmask; + int rc; + + + /* --------------------------------------------------------------- + This routine is called by doint when a receive data event + has taken place. + ------------------------------------------------------------------- */ + + globalwinon(ch); + + if (ch->statusflags & RXSTOPPED) + return; + + tty = ch->tty; + if (tty) + ts = tty->termios; + + bc = ch->brdchan; + + if (!bc) + { + printk(KERN_ERR "<Error> - bc is NULL in receive_data!\n"); + return; + } + + wrapmask = ch->rxbufsize - 1; + + /* --------------------------------------------------------------------- + Get the head and tail pointers to the receiver queue. Wrap the + head pointer if it has reached the end of the buffer. + ------------------------------------------------------------------------ */ + + head = bc->rin; + head &= wrapmask; + tail = bc->rout & wrapmask; + + bytesAvailable = (head - tail) & wrapmask; + + if (bytesAvailable == 0) + return; + + /* ------------------------------------------------------------------ + If CREAD bit is off or device not open, set TX tail to head + --------------------------------------------------------------------- */ + + if (!tty || !ts || !(ts->c_cflag & CREAD)) + { + bc->rout = head; + return; + } + + if (tty->flip.count == TTY_FLIPBUF_SIZE) + return; + + if (bc->orun) + { + bc->orun = 0; + printk(KERN_WARNING "overrun! DigiBoard device %s\n",tty->name); + } + + rxwinon(ch); + rptr = tty->flip.char_buf_ptr; + rc = tty->flip.count; + + while (bytesAvailable > 0) + { /* Begin while there is data on the card */ + + wrapgap = (head >= tail) ? head - tail : ch->rxbufsize - tail; + + /* --------------------------------------------------------------- + Even if head has wrapped around only report the amount of + data to be equal to the size - tail. Remember memcpy can't + automaticly wrap around the receive buffer. + ----------------------------------------------------------------- */ + + dataToRead = (wrapgap < bytesAvailable) ? wrapgap : bytesAvailable; + + /* -------------------------------------------------------------- + Make sure we don't overflow the buffer + ----------------------------------------------------------------- */ + + if ((rc + dataToRead) > TTY_FLIPBUF_SIZE) + dataToRead = TTY_FLIPBUF_SIZE - rc; + + if (dataToRead == 0) + break; + + /* --------------------------------------------------------------- + Move data read from our card into the line disciplines buffer + for translation if necessary. + ------------------------------------------------------------------ */ + + if ((memcpy(rptr, ch->rxptr + tail, dataToRead)) != rptr) + printk(KERN_ERR "<Error> - receive_data : memcpy failed\n"); + + rc += dataToRead; + rptr += dataToRead; + tail = (tail + dataToRead) & wrapmask; + bytesAvailable -= dataToRead; + + } /* End while there is data on the card */ + + + tty->flip.count = rc; + tty->flip.char_buf_ptr = rptr; + globalwinon(ch); + bc->rout = tail; + + /* Must be called with global data */ + tty_schedule_flip(ch->tty); + return; + +} /* End receive_data */ + +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 ; + int brd; + + getUser(brd, (unsigned int __user *)arg); + + if ((brd < 0) || (brd >= num_cards) || (num_cards == 0)) + return (-ENODEV); + + memset(&di, 0, sizeof(di)); + + di.board = brd ; + di.status = boards[brd].status; + di.type = boards[brd].type ; + di.numports = boards[brd].numports ; + di.port = boards[brd].port ; + di.membase = boards[brd].membase ; + + 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 ; + + if ((brd < 0) || (brd >= num_cards)) + { + printk(KERN_ERR "<Error> - DIGI POLLER : brd not valid!\n"); + return (-ENODEV); + } + + digi_poller_inhibited = state ; + break ; + + } /* End case DIGI_POLLER */ + + case DIGI_INIT: + { /* Begin case DIGI_INIT */ + + /* ------------------------------------------------------------ + This call is made by the apps to complete the initilization + of the board(s). This routine is responsible for setting + the card to its initial state and setting the drivers control + fields to the sutianle settings for the card in question. + ---------------------------------------------------------------- */ + + int crd ; + for (crd = 0; crd < num_cards; crd++) + post_fep_init (crd); + + break ; + + } /* End case DIGI_INIT */ + + + default: + return -ENOIOCTLCMD; + + } /* End switch cmd */ + return (0) ; +} +/* --------------------- Begin pc_ioctl ----------------------- */ + +static int pc_tiocmget(struct tty_struct *tty, struct file *file) +{ + struct channel *ch = (struct channel *) tty->driver_data; + volatile struct board_chan *bc; + unsigned int mstat, mflag = 0; + unsigned long flags; + + if (ch) + bc = ch->brdchan; + else + { + printk(KERN_ERR "<Error> - ch is NULL in pc_tiocmget!\n"); + return(-EINVAL); + } + + save_flags(flags); + cli(); + globalwinon(ch); + mstat = bc->mstat; + memoff(ch); + restore_flags(flags); + + if (mstat & ch->m_dtr) + mflag |= TIOCM_DTR; + + if (mstat & ch->m_rts) + mflag |= TIOCM_RTS; + + if (mstat & ch->m_cts) + mflag |= TIOCM_CTS; + + if (mstat & ch->dsr) + mflag |= TIOCM_DSR; + + if (mstat & ch->m_ri) + mflag |= TIOCM_RI; + + if (mstat & ch->dcd) + mflag |= TIOCM_CD; + + return mflag; +} + +static int pc_tiocmset(struct tty_struct *tty, struct file *file, + unsigned int set, unsigned int clear) +{ + struct channel *ch = (struct channel *) tty->driver_data; + unsigned long flags; + + if (!ch) { + printk(KERN_ERR "<Error> - ch is NULL in pc_tiocmset!\n"); + return(-EINVAL); + } + + save_flags(flags); + cli(); + /* + * I think this modemfake stuff is broken. It doesn't + * correctly reflect the behaviour desired by the TIOCM* + * ioctls. Therefore this is probably broken. + */ + if (set & TIOCM_RTS) { + ch->modemfake |= ch->m_rts; + ch->modem |= ch->m_rts; + } + if (set & TIOCM_DTR) { + ch->modemfake |= ch->m_dtr; + ch->modem |= ch->m_dtr; + } + if (clear & TIOCM_RTS) { + ch->modemfake |= ch->m_rts; + ch->modem &= ~ch->m_rts; + } + if (clear & TIOCM_DTR) { + ch->modemfake |= ch->m_dtr; + 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. + ------------------------------------------------------------------ */ + + epcaparam(tty,ch); + memoff(ch); + restore_flags(flags); + return 0; +} + +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; + unsigned int mflag, mstat; + unsigned char startc, stopc; + volatile struct board_chan *bc; + struct channel *ch = (struct channel *) tty->driver_data; + void __user *argp = (void __user *)arg; + + if (ch) + bc = ch->brdchan; + else + { + printk(KERN_ERR "<Error> - ch is NULL in pc_ioctl!\n"); + return(-EINVAL); + } + + save_flags(flags); + + /* ------------------------------------------------------------------- + For POSIX compliance we need to add more ioctls. See tty_ioctl.c + in /usr/src/linux/drivers/char for a good example. In particular + think about adding TCSETAF, TCSETAW, TCSETA, TCSETSF, TCSETSW, TCSETS. + ---------------------------------------------------------------------- */ + + switch (cmd) + { /* Begin switch cmd */ + + case TCGETS: + if (copy_to_user(argp, + tty->termios, sizeof(struct termios))) + return -EFAULT; + return(0); + + case TCGETA: + return get_termio(tty, argp); + + case TCSBRK: /* SVID version: non-zero arg --> no break */ + + retval = tty_check_change(tty); + if (retval) + return retval; + + /* Setup an event to indicate when the transmit buffer empties */ + + setup_empty_event(tty,ch); + tty_wait_until_sent(tty, 0); + if (!arg) + digi_send_break(ch, HZ/4); /* 1/4 second */ + return 0; + + case TCSBRKP: /* support for POSIX tcsendbreak() */ + + retval = tty_check_change(tty); + if (retval) + return retval; + + /* Setup an event to indicate when the transmit buffer empties */ + + setup_empty_event(tty,ch); + tty_wait_until_sent(tty, 0); + digi_send_break(ch, arg ? arg*(HZ/10) : HZ/4); + return 0; + + case TIOCGSOFTCAR: + if (put_user(C_CLOCAL(tty)?1:0, (unsigned long __user *)arg)) + return -EFAULT; + return 0; + + case TIOCSSOFTCAR: + { + unsigned int value; + + if (get_user(value, (unsigned __user *)argp)) + return -EFAULT; + tty->termios->c_cflag = + ((tty->termios->c_cflag & ~CLOCAL) | + (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: + ch->omodem |= ch->m_dtr; + cli(); + globalwinon(ch); + fepcmd(ch, SETMODEM, ch->m_dtr, 0, 10, 1); + memoff(ch); + restore_flags(flags); + break; + + case TIOCCDTR: + ch->omodem &= ~ch->m_dtr; + cli(); + globalwinon(ch); + fepcmd(ch, SETMODEM, 0, ch->m_dtr, 10, 1); + memoff(ch); + restore_flags(flags); + break; + + case DIGI_GETA: + if (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 */ + + setup_empty_event(tty,ch); + 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; + } + + cli(); + globalwinon(ch); + + /* ----------------------------------------------------------------- + The below routine generally sets up parity, baud, flow control + issues, etc.... It effect both control flags and input flags. + ------------------------------------------------------------------- */ + + epcaparam(tty,ch); + memoff(ch); + restore_flags(flags); + break; + + case DIGI_GETFLOW: + case DIGI_GETAFLOW: + cli(); + globalwinon(ch); + if ((cmd) == (DIGI_GETFLOW)) + { + dflow.startc = bc->startc; + dflow.stopc = bc->stopc; + } + else + { + dflow.startc = bc->startca; + dflow.stopc = bc->stopca; + } + memoff(ch); + restore_flags(flags); + + if (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; + + if (dflow.startc != startc || dflow.stopc != stopc) + { /* Begin if setflow toggled */ + cli(); + globalwinon(ch); + + if ((cmd) == (DIGI_SETFLOW)) + { + ch->fepstartc = ch->startc = dflow.startc; + ch->fepstopc = ch->stopc = dflow.stopc; + fepcmd(ch, SONOFFC, ch->fepstartc, ch->fepstopc, 0, 1); + } + else + { + ch->fepstartca = ch->startca = dflow.startc; + ch->fepstopca = ch->stopca = dflow.stopc; + fepcmd(ch, SAUXONOFFC, ch->fepstartca, ch->fepstopca, 0, 1); + } + + if (ch->statusflags & TXSTOPPED) + pc_start(tty); + + memoff(ch); + restore_flags(flags); + + } /* End if setflow toggled */ + break; + + default: + return -ENOIOCTLCMD; + + } /* End switch cmd */ + + return 0; + +} /* End pc_ioctl */ + +/* --------------------- Begin pc_set_termios ----------------------- */ + +static void pc_set_termios(struct tty_struct *tty, struct termios *old_termios) +{ /* Begin pc_set_termios */ + + struct channel *ch; + unsigned long flags; + + /* --------------------------------------------------------- + verifyChannel returns the channel from the tty struct + if it is valid. This serves as a sanity check. + ------------------------------------------------------------- */ + + if ((ch = verifyChannel(tty)) != NULL) + { /* Begin if channel valid */ + + save_flags(flags); + cli(); + globalwinon(ch); + epcaparam(tty, ch); + memoff(ch); + + if ((old_termios->c_cflag & CRTSCTS) && + ((tty->termios->c_cflag & CRTSCTS) == 0)) + tty->hw_stopped = 0; + + if (!(old_termios->c_cflag & CLOCAL) && + (tty->termios->c_cflag & CLOCAL)) + wake_up_interruptible(&ch->open_wait); + + restore_flags(flags); + + } /* End if channel valid */ + +} /* End pc_set_termios */ + +/* --------------------- Begin do_softint ----------------------- */ + +static void do_softint(void *private_) +{ /* Begin do_softint */ + + struct channel *ch = (struct channel *) private_; + + + /* Called in response to a modem change event */ + + if (ch && ch->magic == EPCA_MAGIC) + { /* Begin EPCA_MAGIC */ + + struct tty_struct *tty = ch->tty; + + if (tty && tty->driver_data) + { + if (test_and_clear_bit(EPCA_EVENT_HANGUP, &ch->event)) + { /* Begin if clear_bit */ + + tty_hangup(tty); /* 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 ----------------------- */ + +static void pc_stop(struct tty_struct *tty) +{ /* Begin pc_stop */ + + struct channel *ch; + unsigned long flags; + + /* --------------------------------------------------------- + verifyChannel returns the channel from the tty struct + if it is valid. This serves as a sanity check. + ------------------------------------------------------------- */ + + if ((ch = verifyChannel(tty)) != NULL) + { /* Begin if valid channel */ + + save_flags(flags); + cli(); + + if ((ch->statusflags & TXSTOPPED) == 0) + { /* Begin if transmit stop requested */ + + globalwinon(ch); + + /* STOP transmitting now !! */ + + fepcmd(ch, PAUSETX, 0, 0, 0, 0); + + ch->statusflags |= TXSTOPPED; + memoff(ch); + + } /* End if transmit stop requested */ + + restore_flags(flags); + + } /* End if valid channel */ + +} /* End pc_stop */ + +/* --------------------- Begin pc_start ----------------------- */ + +static void pc_start(struct tty_struct *tty) +{ /* Begin pc_start */ + + struct channel *ch; + + /* --------------------------------------------------------- + verifyChannel returns the channel from the tty struct + if it is valid. This serves as a sanity check. + ------------------------------------------------------------- */ + + if ((ch = verifyChannel(tty)) != NULL) + { /* Begin if channel valid */ + + unsigned long flags; + + save_flags(flags); + cli(); + + /* Just in case output was resumed because of a change in Digi-flow */ + if (ch->statusflags & TXSTOPPED) + { /* Begin transmit resume requested */ + + volatile struct board_chan *bc; + + globalwinon(ch); + bc = ch->brdchan; + if (ch->statusflags & LOWWAIT) + bc->ilow = 1; + + /* Okay, you can start transmitting again... */ + + fepcmd(ch, RESUMETX, 0, 0, 0, 0); + + ch->statusflags &= ~TXSTOPPED; + memoff(ch); + + } /* End transmit resume requested */ + + restore_flags(flags); + + } /* End if channel valid */ + +} /* End pc_start */ + +/* ------------------------------------------------------------------ + The below routines pc_throttle and pc_unthrottle are used + to slow (And resume) the receipt of data into the kernels + receive buffers. The exact 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 */ + + struct channel *ch; + unsigned long flags; + + /* --------------------------------------------------------- + verifyChannel returns the channel from the tty struct + if it is valid. This serves as a sanity check. + ------------------------------------------------------------- */ + + if ((ch = verifyChannel(tty)) != NULL) + { /* Begin if channel valid */ + + + save_flags(flags); + cli(); + + if ((ch->statusflags & RXSTOPPED) == 0) + { + globalwinon(ch); + fepcmd(ch, PAUSERX, 0, 0, 0, 0); + + ch->statusflags |= RXSTOPPED; + memoff(ch); + } + restore_flags(flags); + + } /* End if channel valid */ + +} /* End pc_throttle */ + +/* --------------------- Begin unthrottle ----------------------- */ + +static void pc_unthrottle(struct tty_struct *tty) +{ /* Begin pc_unthrottle */ + + struct channel *ch; + unsigned long flags; + volatile struct board_chan *bc; + + + /* --------------------------------------------------------- + verifyChannel returns the channel from the tty struct + if it is valid. This serves as a sanity check. + ------------------------------------------------------------- */ + + if ((ch = verifyChannel(tty)) != NULL) + { /* Begin if channel valid */ + + + /* Just in case output was resumed because of a change in Digi-flow */ + save_flags(flags); + cli(); + + if (ch->statusflags & RXSTOPPED) + { + + globalwinon(ch); + bc = ch->brdchan; + fepcmd(ch, RESUMERX, 0, 0, 0, 0); + + ch->statusflags &= ~RXSTOPPED; + memoff(ch); + } + restore_flags(flags); + + } /* End if channel valid */ + +} /* End pc_unthrottle */ + +/* --------------------- Begin digi_send_break ----------------------- */ + +void digi_send_break(struct channel *ch, int msec) +{ /* Begin digi_send_break */ + + unsigned long flags; + + save_flags(flags); + cli(); + globalwinon(ch); + + /* -------------------------------------------------------------------- + Maybe I should send an infinite break here, schedule() for + msec amount of time, and then stop the break. This way, + the user can't screw up the FEP by causing digi_send_break() + to be called (i.e. via an ioctl()) more than once in msec amount + of time. Try this for now... + ------------------------------------------------------------------------ */ + + fepcmd(ch, SENDBREAK, msec, 0, 10, 0); + memoff(ch); + + restore_flags(flags); + +} /* End digi_send_break */ + +/* --------------------- Begin setup_empty_event ----------------------- */ + +static void setup_empty_event(struct tty_struct *tty, struct channel *ch) +{ /* Begin setup_empty_event */ + + volatile struct board_chan *bc = ch->brdchan; + unsigned long int flags; + + save_flags(flags); + cli(); + globalwinon(ch); + ch->statusflags |= EMPTYWAIT; + + /* ------------------------------------------------------------------ + When set the iempty flag request a event to be generated when the + transmit buffer is empty (If there is no BREAK in progress). + --------------------------------------------------------------------- */ + + bc->iempty = 1; + memoff(ch); + restore_flags(flags); + +} /* End setup_empty_event */ + +/* --------------------- Begin get_termio ----------------------- */ + +static int get_termio(struct tty_struct * tty, struct termio __user * termio) +{ /* Begin get_termio */ + return kernel_termios_to_user_termio(termio, tty->termios); +} /* End get_termio */ +/* ---------------------- Begin epca_setup -------------------------- */ +void epca_setup(char *str, int *ints) +{ /* Begin epca_setup */ + + struct board_info board; + int index, loop, last; + char *temp, *t2; + unsigned len; + + /* ---------------------------------------------------------------------- + If this routine looks a little strange it is because it is only called + if a LILO append command is given to boot the kernel with parameters. + In this way, we can provide the user a method of changing his board + configuration without rebuilding the kernel. + ----------------------------------------------------------------------- */ + if (!liloconfig) + liloconfig = 1; + + memset(&board, 0, sizeof(board)); + + /* Assume the data is int first, later we can change it */ + /* I think that array position 0 of ints holds the number of args */ + for (last = 0, index = 1; index <= ints[0]; index++) + switch(index) + { /* Begin parse switch */ + + case 1: + board.status = ints[index]; + + /* --------------------------------------------------------- + We check for 2 (As opposed to 1; because 2 is a flag + instructing the driver to ignore epcaconfig.) For this + reason we check for 2. + ------------------------------------------------------------ */ + if (board.status == 2) + { /* Begin ignore epcaconfig as well as lilo cmd line */ + nbdevs = 0; + num_cards = 0; + return; + } /* End ignore epcaconfig as well as lilo cmd line */ + + if (board.status > 2) + { + printk(KERN_ERR "<Error> - epca_setup: Invalid board status 0x%x\n", board.status); + invalid_lilo_config = 1; + setup_error_code |= INVALID_BOARD_STATUS; + return; + } + last = index; + break; + + case 2: + board.type = ints[index]; + if (board.type >= PCIXEM) + { + printk(KERN_ERR "<Error> - epca_setup: Invalid board type 0x%x\n", board.type); + invalid_lilo_config = 1; + setup_error_code |= INVALID_BOARD_TYPE; + return; + } + last = index; + break; + + case 3: + board.altpin = ints[index]; + if (board.altpin > 1) + { + printk(KERN_ERR "<Error> - epca_setup: Invalid board altpin 0x%x\n", board.altpin); + invalid_lilo_config = 1; + setup_error_code |= INVALID_ALTPIN; + return; + } + last = index; + break; + + case 4: + board.numports = ints[index]; + if ((board.numports < 2) || (board.numports > 256)) + { + printk(KERN_ERR "<Error> - epca_setup: Invalid board numports 0x%x\n", board.numports); + invalid_lilo_config = 1; + setup_error_code |= INVALID_NUM_PORTS; + return; + } + nbdevs += board.numports; + last = index; + break; + + case 5: + board.port = (unsigned char *)ints[index]; + if (ints[index] <= 0) + { + printk(KERN_ERR "<Error> - epca_setup: Invalid io port 0x%x\n", (unsigned int)board.port); + invalid_lilo_config = 1; + setup_error_code |= INVALID_PORT_BASE; + return; + } + last = index; + break; + + case 6: + board.membase = (unsigned char *)ints[index]; + if (ints[index] <= 0) + { + printk(KERN_ERR "<Error> - epca_setup: Invalid memory base 0x%x\n",(unsigned int)board.membase); + invalid_lilo_config = 1; + setup_error_code |= INVALID_MEM_BASE; + return; + } + last = index; + break; + + default: + printk(KERN_ERR "<Error> - epca_setup: Too many integer parms\n"); + return; + + } /* End parse switch */ + + while (str && *str) + { /* Begin while there is a string arg */ + + /* find the next comma or terminator */ + temp = str; + + /* While string is not null, and a comma hasn't been found */ + while (*temp && (*temp != ',')) + temp++; + + if (!*temp) + temp = NULL; + else + *temp++ = 0; + + /* Set index to the number of args + 1 */ + index = last + 1; + + switch(index) + { + case 1: + len = strlen(str); + if (strncmp("Disable", str, len) == 0) + board.status = 0; + else + if (strncmp("Enable", str, len) == 0) + board.status = 1; + else + { + printk(KERN_ERR "<Error> - epca_setup: Invalid status %s\n", str); + invalid_lilo_config = 1; + setup_error_code |= INVALID_BOARD_STATUS; + return; + } + last = index; + break; + + case 2: + + for(loop = 0; loop < EPCA_NUM_TYPES; loop++) + if (strcmp(board_desc[loop], str) == 0) + break; + + + /* --------------------------------------------------------------- + If the index incremented above refers to a legitamate board + type set it here. + ------------------------------------------------------------------*/ + + if (index < EPCA_NUM_TYPES) + board.type = loop; + else + { + printk(KERN_ERR "<Error> - epca_setup: Invalid board type: %s\n", str); + invalid_lilo_config = 1; + setup_error_code |= INVALID_BOARD_TYPE; + return; + } + last = index; + break; + + case 3: + len = strlen(str); + if (strncmp("Disable", str, len) == 0) + board.altpin = 0; + else + if (strncmp("Enable", str, len) == 0) + board.altpin = 1; + else + { + printk(KERN_ERR "<Error> - epca_setup: Invalid altpin %s\n", str); + invalid_lilo_config = 1; + setup_error_code |= INVALID_ALTPIN; + return; + } + last = index; + break; + + case 4: + t2 = str; + while (isdigit(*t2)) + t2++; + + if (*t2) + { + printk(KERN_ERR "<Error> - epca_setup: Invalid port count %s\n", str); + invalid_lilo_config = 1; + setup_error_code |= INVALID_NUM_PORTS; + return; + } + + /* ------------------------------------------------------------ + There is not a man page for simple_strtoul but the code can be + found in vsprintf.c. The first argument is the string to + translate (To an unsigned long obviously), the second argument + can be the address of any character variable or a NULL. If a + variable is given, the end pointer of the string will be stored + in that variable; if a NULL is given the end pointer will + not be returned. The last argument is the base to use. If + a 0 is indicated, the routine will attempt to determine the + proper base by looking at the values prefix (A '0' for octal, + a 'x' for hex, etc ... If a value is given it will use that + value as the base. + ---------------------------------------------------------------- */ + board.numports = simple_strtoul(str, NULL, 0); + nbdevs += board.numports; + last = index; + break; + + case 5: + t2 = str; + while (isxdigit(*t2)) + t2++; + + if (*t2) + { + printk(KERN_ERR "<Error> - epca_setup: Invalid i/o address %s\n", str); + invalid_lilo_config = 1; + setup_error_code |= INVALID_PORT_BASE; + return; + } + + board.port = (unsigned char *)simple_strtoul(str, NULL, 16); + last = index; + break; + + case 6: + t2 = str; + while (isxdigit(*t2)) + t2++; + + if (*t2) + { + printk(KERN_ERR "<Error> - epca_setup: Invalid memory base %s\n",str); + invalid_lilo_config = 1; + setup_error_code |= INVALID_MEM_BASE; + return; + } + + board.membase = (unsigned char *)simple_strtoul(str, NULL, 16); + last = index; + break; + + default: + printk(KERN_ERR "PC/Xx: Too many string parms\n"); + return; + } + str = temp; + + } /* End while there is a string arg */ + + + if (last < 6) + { + printk(KERN_ERR "PC/Xx: Insufficient parms specified\n"); + return; + } + + /* I should REALLY validate the stuff here */ + + /* Copies our local copy of board into boards */ + memcpy((void *)&boards[num_cards],(void *)&board, sizeof(board)); + + + /* Does this get called once per lilo arg are what ? */ + + printk(KERN_INFO "PC/Xx: Added board %i, %s %i ports at 0x%4.4X base 0x%6.6X\n", + num_cards, board_desc[board.type], + board.numports, (int)board.port, (unsigned int) board.membase); + + num_cards++; + +} /* End epca_setup */ + + + +#ifdef ENABLE_PCI +/* ------------------------ Begin init_PCI --------------------------- */ + +enum epic_board_types { + brd_xr = 0, + brd_xem, + brd_cx, + brd_xrj, +}; + + +/* indexed directly by epic_board_types enum */ +static struct { + unsigned char board_type; + unsigned bar_idx; /* PCI base address region */ +} epca_info_tbl[] = { + { PCIXR, 0, }, + { PCIXEM, 0, }, + { PCICX, 0, }, + { PCIXRJ, 2, }, +}; + + +static int __devinit epca_init_one (struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + static int board_num = -1; + int board_idx, info_idx = ent->driver_data; + unsigned long addr; + + if (pci_enable_device(pdev)) + return -EIO; + + board_num++; + 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", + epca_info_tbl[info_idx].bar_idx); + goto err_out; + } + + boards[board_idx].status = ENABLED; + boards[board_idx].type = epca_info_tbl[info_idx].board_type; + boards[board_idx].numports = 0x0; + boards[board_idx].port = + (unsigned char *)((char *) addr + PCI_IO_OFFSET); + boards[board_idx].membase = + (unsigned char *)((char *) addr); + + if (!request_mem_region (addr + PCI_IO_OFFSET, 0x200000, "epca")) { + printk (KERN_ERR PFX "resource 0x%x @ 0x%lx unavailable\n", + 0x200000, addr + PCI_IO_OFFSET); + goto err_out; + } + + boards[board_idx].re_map_port = ioremap(addr + PCI_IO_OFFSET, 0x200000); + if (!boards[board_idx].re_map_port) { + printk (KERN_ERR PFX "cannot map 0x%x @ 0x%lx\n", + 0x200000, addr + PCI_IO_OFFSET); + goto err_out_free_pciio; + } + + if (!request_mem_region (addr, 0x200000, "epca")) { + printk (KERN_ERR PFX "resource 0x%x @ 0x%lx unavailable\n", + 0x200000, addr); + goto err_out_free_iounmap; + } + + boards[board_idx].re_map_membase = ioremap(addr, 0x200000); + if (!boards[board_idx].re_map_membase) { + printk (KERN_ERR PFX "cannot map 0x%x @ 0x%lx\n", + 0x200000, addr + PCI_IO_OFFSET); + 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). + ---------------------------------------------------------------- */ + if (info_idx != brd_xrj) { + pci_write_config_byte(pdev, 0x40, 0); + pci_write_config_byte(pdev, 0x46, 0); + } + + return 0; + +err_out_free_memregion: + release_mem_region (addr, 0x200000); +err_out_free_iounmap: + iounmap (boards[board_idx].re_map_port); +err_out_free_pciio: + release_mem_region (addr + PCI_IO_OFFSET, 0x200000); +err_out: + return -ENODEV; +} + + +static struct pci_device_id epca_pci_tbl[] = { + { PCI_VENDOR_DIGI, PCI_DEVICE_XR, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xr }, + { PCI_VENDOR_DIGI, PCI_DEVICE_XEM, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xem }, + { PCI_VENDOR_DIGI, PCI_DEVICE_CX, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_cx }, + { PCI_VENDOR_DIGI, PCI_DEVICE_XRJ, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xrj }, + { 0, } +}; + +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; + epca_driver.probe = epca_init_one; + + return pci_register_driver(&epca_driver); +} /* End init_PCI */ + +#endif /* ENABLE_PCI */ + +MODULE_LICENSE("GPL"); |