diff options
Diffstat (limited to 'drivers/char/epca.c')
| -rw-r--r-- | drivers/char/epca.c | 2784 |
1 files changed, 0 insertions, 2784 deletions
diff --git a/drivers/char/epca.c b/drivers/char/epca.c deleted file mode 100644 index d9df46aa0fb..00000000000 --- a/drivers/char/epca.c +++ /dev/null @@ -1,2784 +0,0 @@ -/* - Copyright (C) 1996 Digi International. - - For technical support please email digiLinux@dgii.com or - call Digi tech support at (612) 912-3456 - - ** This driver is no longer supported by Digi ** - - Much of this design and code came from epca.c which was - copyright (C) 1994, 1995 Troy De Jongh, and subsquently - modified by David Nugent, Christoph Lameter, Mike McLagan. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. -*/ -/* See README.epca for change history --DAT*/ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/init.h> -#include <linux/sched.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 <linux/uaccess.h> -#include <linux/io.h> -#include <linux/spinlock.h> -#include <linux/pci.h> -#include "digiPCI.h" - - -#include "digi1.h" -#include "digiFep1.h" -#include "epca.h" -#include "epcaconfig.h" - -#define VERSION "1.3.0.1-LK2.6" - -/* This major needs to be submitted to Linux to join the majors list */ -#define DIGIINFOMAJOR 35 /* For Digi specific ioctl */ - - -#define MAXCARDS 7 -#define epcaassert(x, msg) if (!(x)) epca_error(__LINE__, msg) - -#define PFX "epca: " - -static int nbdevs, num_cards, liloconfig; -static int digi_poller_inhibited = 1 ; - -static int setup_error_code; -static int invalid_lilo_config; - -/* - * The ISA boards do window flipping into the same spaces so its only sane with - * a single lock. It's still pretty efficient. This lock guards the hardware - * and the tty_port lock guards the kernel side stuff like use counts. Take - * this lock inside the port lock if you must take both. - */ -static DEFINE_SPINLOCK(epca_lock); - -/* MAXBOARDS is typically 12, but ISA and EISA cards are restricted - to 7 below. */ -static struct board_info boards[MAXBOARDS]; - -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 generic memory functions. These functions will be alias (point at) - * more specific functions dependent on the board being configured. - */ -static void memwinon(struct board_info *b, unsigned int win); -static void memwinoff(struct board_info *b, unsigned int win); -static void globalwinon(struct channel *ch); -static void rxwinon(struct channel *ch); -static void txwinon(struct channel *ch); -static void memoff(struct channel *ch); -static void assertgwinon(struct channel *ch); -static void assertmemoff(struct channel *ch); - -/* ---- Begin more 'specific' memory functions for cx_like products --- */ - -static void pcxem_memwinon(struct board_info *b, unsigned int win); -static void pcxem_memwinoff(struct board_info *b, unsigned int win); -static void pcxem_globalwinon(struct channel *ch); -static void pcxem_rxwinon(struct channel *ch); -static void pcxem_txwinon(struct channel *ch); -static void pcxem_memoff(struct channel *ch); - -/* ------ Begin more 'specific' memory functions for the pcxe ------- */ - -static void pcxe_memwinon(struct board_info *b, unsigned int win); -static void pcxe_memwinoff(struct board_info *b, unsigned int win); -static void pcxe_globalwinon(struct channel *ch); -static void pcxe_rxwinon(struct channel *ch); -static void pcxe_txwinon(struct channel *ch); -static 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 void pcxi_memwinon(struct board_info *b, unsigned int win); -static void pcxi_memwinoff(struct board_info *b, unsigned int win); -static void pcxi_globalwinon(struct channel *ch); -static void pcxi_rxwinon(struct channel *ch); -static void pcxi_txwinon(struct channel *ch); -static void pcxi_memoff(struct channel *ch); - -/* - Begin 'specific' do nothing memory functions needed for some cards - */ - -static void dummy_memwinon(struct board_info *b, unsigned int win); -static void dummy_memwinoff(struct board_info *b, unsigned int win); -static void dummy_globalwinon(struct channel *ch); -static void dummy_rxwinon(struct channel *ch); -static void dummy_txwinon(struct channel *ch); -static void dummy_memoff(struct channel *ch); -static void dummy_assertgwinon(struct channel *ch); -static void dummy_assertmemoff(struct channel *ch); - -static struct channel *verifyChannel(struct tty_struct *); -static 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 *, struct tty_struct *tty); -static void pc_hangup(struct tty_struct *); -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 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 *, struct tty_struct *tty); -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 ktermios *); -static void do_softint(struct work_struct *work); -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 int pc_send_break(struct tty_struct *tty, int msec); -static void setup_empty_event(struct tty_struct *tty, struct channel *ch); - -static int pc_write(struct tty_struct *, const unsigned char *, int); -static int pc_init(void); -static int init_PCI(void); - -/* - * Table of functions for each board to handle memory. Mantaining parallelism - * is a *very* good idea here. The idea is for the runtime code to blindly call - * these functions, not knowing/caring about the underlying hardware. This - * stuff should contain no conditionals; if more functionality is needed a - * different entry should be established. These calls are the interface calls - * and are the only functions that should be accessed. Anyone caught making - * direct calls deserves what they get. - */ -static void memwinon(struct board_info *b, unsigned int win) -{ - b->memwinon(b, win); -} - -static void memwinoff(struct board_info *b, unsigned int win) -{ - b->memwinoff(b, win); -} - -static void globalwinon(struct channel *ch) -{ - ch->board->globalwinon(ch); -} - -static void rxwinon(struct channel *ch) -{ - ch->board->rxwinon(ch); -} - -static void txwinon(struct channel *ch) -{ - ch->board->txwinon(ch); -} - -static void memoff(struct channel *ch) -{ - ch->board->memoff(ch); -} -static void assertgwinon(struct channel *ch) -{ - ch->board->assertgwinon(ch); -} - -static 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 void pcxem_memwinon(struct board_info *b, unsigned int win) -{ - outb_p(FEPWIN | win, b->port + 1); -} - -static void pcxem_memwinoff(struct board_info *b, unsigned int win) -{ - outb_p(0, b->port + 1); -} - -static void pcxem_globalwinon(struct channel *ch) -{ - outb_p(FEPWIN, (int)ch->board->port + 1); -} - -static void pcxem_rxwinon(struct channel *ch) -{ - outb_p(ch->rxwin, (int)ch->board->port + 1); -} - -static void pcxem_txwinon(struct channel *ch) -{ - outb_p(ch->txwin, (int)ch->board->port + 1); -} - -static void pcxem_memoff(struct channel *ch) -{ - outb_p(0, (int)ch->board->port + 1); -} - -/* ----------------- Begin pcxe memory window stuff ------------------ */ -static void pcxe_memwinon(struct board_info *b, unsigned int win) -{ - outb_p(FEPWIN | win, b->port + 1); -} - -static void pcxe_memwinoff(struct board_info *b, unsigned int win) -{ - outb_p(inb(b->port) & ~FEPMEM, b->port + 1); - outb_p(0, b->port + 1); -} - -static void pcxe_globalwinon(struct channel *ch) -{ - outb_p(FEPWIN, (int)ch->board->port + 1); -} - -static void pcxe_rxwinon(struct channel *ch) -{ - outb_p(ch->rxwin, (int)ch->board->port + 1); -} - -static void pcxe_txwinon(struct channel *ch) -{ - outb_p(ch->txwin, (int)ch->board->port + 1); -} - -static 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 void pcxi_memwinon(struct board_info *b, unsigned int win) -{ - outb_p(inb(b->port) | FEPMEM, b->port); -} - -static void pcxi_memwinoff(struct board_info *b, unsigned int win) -{ - outb_p(inb(b->port) & ~FEPMEM, b->port); -} - -static void pcxi_globalwinon(struct channel *ch) -{ - outb_p(FEPMEM, ch->board->port); -} - -static void pcxi_rxwinon(struct channel *ch) -{ - outb_p(FEPMEM, ch->board->port); -} - -static void pcxi_txwinon(struct channel *ch) -{ - outb_p(FEPMEM, ch->board->port); -} - -static void pcxi_memoff(struct channel *ch) -{ - outb_p(0, ch->board->port); -} - -static void pcxi_assertgwinon(struct channel *ch) -{ - epcaassert(inb(ch->board->port) & FEPMEM, "Global memory off"); -} - -static void pcxi_assertmemoff(struct channel *ch) -{ - epcaassert(!(inb(ch->board->port) & FEPMEM), "Memory on"); -} - -/* - * Not all of the cards need specific memory windowing routines. Some cards - * (Such as PCI) needs no windowing routines at all. We provide these do - * nothing routines so that the same code base can be used. The driver will - * ALWAYS call a windowing routine if it thinks it needs to; regardless of the - * card. However, dependent on the card the routine may or may not do anything. - */ -static void dummy_memwinon(struct board_info *b, unsigned int win) -{ -} - -static void dummy_memwinoff(struct board_info *b, unsigned int win) -{ -} - -static void dummy_globalwinon(struct channel *ch) -{ -} - -static void dummy_rxwinon(struct channel *ch) -{ -} - -static void dummy_txwinon(struct channel *ch) -{ -} - -static void dummy_memoff(struct channel *ch) -{ -} - -static void dummy_assertgwinon(struct channel *ch) -{ -} - -static void dummy_assertmemoff(struct channel *ch) -{ -} - -static struct channel *verifyChannel(struct tty_struct *tty) -{ - /* - * This routine basically provides a sanity check. It insures that the - * channel returned is within the proper range of addresses as well as - * properly initialized. If some bogus info gets passed in - * through tty->driver_data this should catch it. - */ - if (tty) { - struct channel *ch = tty->driver_data; - if (ch >= &digi_channels[0] && ch < &digi_channels[nbdevs]) { - if (ch->magic == EPCA_MAGIC) - return ch; - } - } - return NULL; -} - -static void pc_sched_event(struct channel *ch, int event) -{ - /* - * We call this to schedule interrupt processing on some event. The - * kernel sees our request and calls the related routine in OUR driver. - */ - ch->event |= 1 << event; - schedule_work(&ch->tqueue); -} - -static void epca_error(int line, char *msg) -{ - printk(KERN_ERR "epca_error (Digi): line = %d %s\n", line, msg); -} - -static void pc_close(struct tty_struct *tty, struct file *filp) -{ - struct channel *ch; - struct tty_port *port; - /* - * verifyChannel returns the channel from the tty struct if it is - * valid. This serves as a sanity check. - */ - ch = verifyChannel(tty); - if (ch == NULL) - return; - port = &ch->port; - - if (tty_port_close_start(port, tty, filp) == 0) - return; - - pc_flush_buffer(tty); - shutdown(ch, tty); - - tty_port_close_end(port, tty); - ch->event = 0; /* FIXME: review ch->event locking */ - tty_port_tty_set(port, NULL); -} - -static void shutdown(struct channel *ch, struct tty_struct *tty) -{ - unsigned long flags; - struct board_chan __iomem *bc; - struct tty_port *port = &ch->port; - - if (!(port->flags & ASYNC_INITIALIZED)) - return; - - spin_lock_irqsave(&epca_lock, flags); - - globalwinon(ch); - bc = ch->brdchan; - - /* - * In order for an event to be generated on the receipt of data the - * idata flag must be set. Since we are shutting down, this is not - * necessary clear this flag. - */ - if (bc) - writeb(0, &bc->idata); - - /* 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 */ - port->flags &= ~ASYNC_INITIALIZED; - spin_unlock_irqrestore(&epca_lock, flags); -} - -static void pc_hangup(struct tty_struct *tty) -{ - struct channel *ch; - - /* - * verifyChannel returns the channel from the tty struct if it is - * valid. This serves as a sanity check. - */ - ch = verifyChannel(tty); - if (ch != NULL) { - pc_flush_buffer(tty); - tty_ldisc_flush(tty); - shutdown(ch, tty); - - ch->event = 0; /* FIXME: review locking of ch->event */ - tty_port_hangup(&ch->port); - } -} - -static int pc_write(struct tty_struct *tty, - const unsigned char *buf, int bytesAvailable) -{ - unsigned int head, tail; - int dataLen; - int size; - int amountCopied; - struct channel *ch; - unsigned long flags; - int remain; - struct board_chan __iomem *bc; - - /* - * pc_write is primarily called directly by the kernel routine - * tty_write (Though it can also be called by put_char) found in - * tty_io.c. pc_write is passed a line discipline buffer where the data - * to be written out is stored. The line discipline implementation - * itself is done at the kernel level and is not brought into the - * driver. - */ - - /* - * verifyChannel returns the channel from the tty struct if it is - * valid. This serves as a sanity check. - */ - ch = verifyChannel(tty); - if (ch == NULL) - return 0; - - /* Make a pointer to the channel data structure found on the board. */ - bc = ch->brdchan; - size = ch->txbufsize; - amountCopied = 0; - - spin_lock_irqsave(&epca_lock, flags); - globalwinon(ch); - - head = readw(&bc->tin) & (size - 1); - tail = readw(&bc->tout); - - if (tail != readw(&bc->tout)) - tail = readw(&bc->tout); - tail &= (size - 1); - - if (head >= tail) { - /* head has not wrapped */ - /* - * remain (much like dataLen above) represents the total amount - * of space available on the card for data. Here dataLen - * represents the space existing between the head pointer and - * the end of buffer. This is important because a memcpy cannot - * be told to automatically wrap around when it hits the buffer - * end. - */ - dataLen = size - head; - remain = size - (head - tail) - 1; - } else { - /* head has wrapped around */ - remain = tail - head - 1; - dataLen = remain; - } - /* - * 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) { - /* there is data to copy onto card */ - - /* - * If head is not wrapped, the below will make sure the first - * data copy fills to the end of card buffer. - */ - dataLen = min(bytesAvailable, dataLen); - memcpy_toio(ch->txptr + head, buf, dataLen); - buf += dataLen; - head += dataLen; - amountCopied += dataLen; - bytesAvailable -= dataLen; - - if (head >= size) { - head = 0; - dataLen = tail; - } - } - ch->statusflags |= TXBUSY; - globalwinon(ch); - writew(head, &bc->tin); - - if ((ch->statusflags & LOWWAIT) == 0) { - ch->statusflags |= LOWWAIT; - writeb(1, &bc->ilow); - } - memoff(ch); - spin_unlock_irqrestore(&epca_lock, flags); - return amountCopied; -} - -static int pc_write_room(struct tty_struct *tty) -{ - int remain = 0; - struct channel *ch; - unsigned long flags; - unsigned int head, tail; - struct board_chan __iomem *bc; - /* - * verifyChannel returns the channel from the tty struct if it is - * valid. This serves as a sanity check. - */ - ch = verifyChannel(tty); - if (ch != NULL) { - spin_lock_irqsave(&epca_lock, flags); - globalwinon(ch); - - bc = ch->brdchan; - head = readw(&bc->tin) & (ch->txbufsize - 1); - tail = readw(&bc->tout); - - if (tail != readw(&bc->tout)) - tail = readw(&bc->tout); - /* Wrap tail if necessary */ - tail &= (ch->txbufsize - 1); - remain = tail - head - 1; - if (remain < 0) - remain += ch->txbufsize; - - if (remain && (ch->statusflags & LOWWAIT) == 0) { - ch->statusflags |= LOWWAIT; - writeb(1, &bc->ilow); - } - memoff(ch); - spin_unlock_irqrestore(&epca_lock, flags); - } - /* Return how much room is left on card */ - return remain; -} - -static int pc_chars_in_buffer(struct tty_struct *tty) -{ - int chars; - unsigned int ctail, head, tail; - int remain; - unsigned long flags; - struct channel *ch; - struct board_chan __iomem *bc; - /* - * verifyChannel returns the channel from the tty struct if it is - * valid. This serves as a sanity check. - */ - ch = verifyChannel(tty); - if (ch == NULL) - return 0; - - spin_lock_irqsave(&epca_lock, flags); - globalwinon(ch); - - bc = ch->brdchan; - tail = readw(&bc->tout); - head = readw(&bc->tin); - ctail = readw(&ch->mailbox->cout); - - if (tail == head && readw(&ch->mailbox->cin) == ctail && - readb(&bc->tbusy) == 0) - chars = 0; - else { /* Begin if some space on the card has been used */ - head = readw(&bc->tin) & (ch->txbufsize - 1); - tail &= (ch->txbufsize - 1); - /* - * The logic here is basically opposite of the above - * pc_write_room here we are finding the amount of bytes in the - * buffer filled. Not the amount of bytes empty. - */ - remain = tail - head - 1; - if (remain < 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); - spin_unlock_irqrestore(&epca_lock, flags); - /* Return number of characters residing on card. */ - return chars; -} - -static void pc_flush_buffer(struct tty_struct *tty) -{ - unsigned int tail; - unsigned long flags; - struct channel *ch; - struct board_chan __iomem *bc; - /* - * verifyChannel returns the channel from the tty struct if it is - * valid. This serves as a sanity check. - */ - ch = verifyChannel(tty); - if (ch == NULL) - return; - - spin_lock_irqsave(&epca_lock, flags); - globalwinon(ch); - bc = ch->brdchan; - tail = readw(&bc->tout); - /* Have FEP move tout pointer; effectively flushing transmit buffer */ - fepcmd(ch, STOUT, (unsigned) tail, 0, 0, 0); - memoff(ch); - spin_unlock_irqrestore(&epca_lock, flags); - tty_wakeup(tty); -} - -static void pc_flush_chars(struct tty_struct *tty) -{ - struct channel *ch; - /* - * verifyChannel returns the channel from the tty struct if it is - * valid. This serves as a sanity check. - */ - ch = verifyChannel(tty); - if (ch != NULL) { - unsigned long flags; - spin_lock_irqsave(&epca_lock, flags); - /* - * If not already set and the transmitter is busy setup an - * event to indicate when the transmit empties. - */ - if ((ch->statusflags & TXBUSY) && - !(ch->statusflags & EMPTYWAIT)) - setup_empty_event(tty, ch); - spin_unlock_irqrestore(&epca_lock, flags); - } -} - -static int epca_carrier_raised(struct tty_port *port) -{ - struct channel *ch = container_of(port, struct channel, port); - if (ch->imodem & ch->dcd) - return 1; - return 0; -} - -static void epca_dtr_rts(struct tty_port *port, int onoff) -{ -} - -static int pc_open(struct tty_struct *tty, struct file *filp) -{ - struct channel *ch; - struct tty_port *port; - unsigned long flags; - int line, retval, boardnum; - struct board_chan __iomem *bc; - unsigned int head; - - line = tty->index; - if (line < 0 || line >= nbdevs) - return -ENODEV; - - ch = &digi_channels[line]; - port = &ch->port; - boardnum = ch->boardnum; - - /* Check status of board configured in system. */ - - /* - * I check to see if the epca_setup routine detected a user error. It - * might be better to put this in pc_init, but for the moment it goes - * here. - */ - if (invalid_lilo_config) { - if (setup_error_code & INVALID_BOARD_TYPE) - printk(KERN_ERR "epca: pc_open: Invalid board type specified in kernel options.\n"); - if (setup_error_code & INVALID_NUM_PORTS) - printk(KERN_ERR "epca: pc_open: Invalid number of ports specified in kernel options.\n"); - if (setup_error_code & INVALID_MEM_BASE) - printk(KERN_ERR "epca: pc_open: Invalid board memory address specified in kernel options.\n"); - if (setup_error_code & INVALID_PORT_BASE) - printk(KERN_ERR "epca; pc_open: Invalid board port address specified in kernel options.\n"); - if (setup_error_code & INVALID_BOARD_STATUS) - printk(KERN_ERR "epca: pc_open: Invalid board status specified in kernel options.\n"); - if (setup_error_code & INVALID_ALTPIN) - printk(KERN_ERR "epca: pc_open: Invalid board altpin specified in kernel options;\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); - } - - bc = ch->brdchan; - if (bc == NULL) { - tty->driver_data = NULL; - return -ENODEV; - } - - spin_lock_irqsave(&port->lock, flags); - /* - * Every time a channel is opened, increment a counter. This is - * necessary because we do not wish to flush and shutdown the channel - * until the last app holding the channel open, closes it. - */ - port->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; - port->tty = tty; - /* - * If this is the first time the channel has been opened, initialize - * the tty->termios struct otherwise let pc_close handle it. - */ - spin_lock(&epca_lock); - globalwinon(ch); - ch->statusflags = 0; - - /* Save boards current modem status */ - ch->imodem = readb(&bc->mstat); - - /* - * Set receive head and tail ptrs to each other. This indicates no data - * available to read. - */ - head = readw(&bc->rin); - writew(head, &bc->rout); - - /* Set the channels associated tty structure */ - - /* - * The below routine generally sets up parity, baud, flow control - * issues, etc.... It effect both control flags and input flags. - */ - epcaparam(tty, ch); - memoff(ch); - spin_unlock(&epca_lock); - port->flags |= ASYNC_INITIALIZED; - spin_unlock_irqrestore(&port->lock, flags); - - retval = tty_port_block_til_ready(port, tty, filp); - if (retval) - return retval; - /* - * Set this again in case a hangup set it to zero while this open() was - * waiting for the line... - */ - spin_lock_irqsave(&port->lock, flags); - port->tty = tty; - spin_lock(&epca_lock); - globalwinon(ch); - /* Enable Digi Data events */ - writeb(1, &bc->idata); - memoff(ch); - spin_unlock(&epca_lock); - spin_unlock_irqrestore(&port->lock, flags); - return 0; -} - -static int __init epca_module_init(void) -{ - return pc_init(); -} -module_init(epca_module_init); - -static struct pci_driver epca_driver; - -static void __exit epca_module_exit(void) -{ - int count, crd; - struct board_info *bd; - struct channel *ch; - - del_timer_sync(&epca_timer); - - if (tty_unregister_driver(pc_driver) || - tty_unregister_driver(pc_info)) { - printk(KERN_WARNING "epca: cleanup_module failed to un-register tty driver\n"); - return; - } - put_tty_driver(pc_driver); - put_tty_driver(pc_info); - - for (crd = 0; crd < num_cards; crd++) { - bd = &boards[crd]; - if (!bd) { /* sanity check */ - printk(KERN_ERR "<Error> - Digi : cleanup_module failed\n"); - return; - } - ch = card_ptr[crd]; - for (count = 0; count < bd->numports; count++, ch++) { - struct tty_struct *tty = tty_port_tty_get(&ch->port); - if (tty) { - tty_hangup(tty); - tty_kref_put(tty); - } - } - } - pci_unregister_driver(&epca_driver); -} -module_exit(epca_module_exit); - -static const 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, - .ioctl = pc_ioctl, - .set_termios = pc_set_termios, - .stop = pc_stop, - .start = pc_start, - .throttle = pc_throttle, - .unthrottle = pc_unthrottle, - .hangup = pc_hangup, - .break_ctl = pc_send_break -}; - -static const struct tty_port_operations epca_port_ops = { - .carrier_raised = epca_carrier_raised, - .dtr_rts = epca_dtr_rts, -}; - -static int info_open(struct tty_struct *tty, struct file *filp) -{ - return 0; -} - -static const struct tty_operations info_ops = { - .open = info_open, - .ioctl = info_ioctl, -}; - -static int __init pc_init(void) -{ - int crd; - struct board_info *bd; - unsigned char board_id = 0; - int err = -ENOMEM; - - int pci_boards_found, pci_count; - - pci_count = 0; - - pc_driver = alloc_tty_driver(MAX_ALLOC); - if (!pc_driver) - goto out1; - - pc_info = alloc_tty_driver(MAX_ALLOC); - if (!pc_info) - goto out2; - - /* - * If epca_setup has not been ran by LILO set num_cards to defaults; - * copy board structure defined by digiConfig into drivers board - * structure. Note : If LILO has ran epca_setup then epca_setup will - * handle defining num_cards as well as copying the data into the board - * structure. - */ - if (!liloconfig) { - /* driver has been configured via. epcaconfig */ - nbdevs = NBDEVS; - num_cards = NUMCARDS; - memcpy(&boards, &static_boards, - sizeof(struct board_info) * NUMCARDS); - } - - /* - * Note : If lilo was used to configure the driver and the ignore - * epcaconfig option was choosen (digiepca=2) then nbdevs and num_cards - * will equal 0 at this point. This is okay; PCI cards will still be - * picked up if detected. - */ - - /* - * Set up interrupt, we will worry about memory allocation in - * post_fep_init. - */ - printk(KERN_INFO "DIGI epca driver version %s loaded.\n", VERSION); - - /* - * NOTE : This code assumes that the number of ports found in the - * boards array is correct. This could be wrong if the card in question - * is PCI (And therefore has no ports entry in the boards structure.) - * The rest of the information will be valid for PCI because the - * beginning of pc_init scans for PCI and determines i/o and base - * memory addresses. I am not sure if it is possible to read the number - * of ports supported by the card prior to it being booted (Since that - * is the state it is in when pc_init is run). Because it is not - * possible to query the number of supported ports until after the card - * has booted; we are required to calculate the card_ptrs as the card - * is 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; - - pc_driver->owner = THIS_MODULE; - pc_driver->name = "ttyD"; - pc_driver->major = DIGI_MAJOR; - pc_driver->minor_start = 0; - pc_driver->type = TTY_DRIVER_TYPE_SERIAL; - pc_driver->subtype = SERIAL_TYPE_NORMAL; - 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->init_termios.c_ispeed = 9600; - pc_driver->init_termios.c_ospeed = 9600; - pc_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_HARDWARE_BREAK; - 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->init_termios.c_ispeed = 9600; - pc_info->init_termios.c_ospeed = 9600; - pc_info->flags = TTY_DRIVER_REAL_RAW; - tty_set_operations(pc_info, &info_ops); - - - for (crd = 0; crd < num_cards; crd++) { - /* - * This is where the appropriate memory handlers for the - * hardware is set. Everything at runtime blindly jumps through - * these vectors. - */ - - /* defined in epcaconfig.h */ - bd = &boards[crd]; - - switch (bd->type) { - 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; - } - - /* - * Some cards need a memory segment to be defined for use in - * transmit and receive windowing operations. These boards are - * listed in the below switch. In the case of the XI the amount - * of memory on the board is variable so the memory_seg is also - * variable. This code determines what they segment should be. - */ - switch (bd->type) { - case PCXE: - case PCXEVE: - case PC64XE: - bd->memory_seg = 0xf000; - break; - - case PCXI: - board_id = inb((int)bd->port); - if ((board_id & 0x1) == 0x1) { - /* it's an XI card */ - /* Is it a 64K board */ - if ((board_id & 0x30) == 0) - bd->memory_seg = 0xf000; - - /* Is it a 128K board */ - if ((board_id & 0x30) == 0x10) - bd->memory_seg = 0xe000; - - /* Is is a 256K board */ - if ((board_id & 0x30) == 0x20) - bd->memory_seg = 0xc000; - - /* Is it a 512K board */ - if ((board_id & 0x30) == 0x30) - bd->memory_seg = 0x8000; - } else - printk(KERN_ERR "epca: Board at 0x%x doesn't appear to be an XI\n", (int)bd->port); - break; - } - } - - err = tty_register_driver(pc_driver); - if (err) { - printk(KERN_ERR "Couldn't register Digi PC/ driver"); - goto out3; - } - |