/*****************************************************************************/
/*
* stallion.c -- stallion multiport serial driver.
*
* Copyright (C) 1994-1996 Greg Ungerer (gerg@stallion.oz.au).
*
* This code is loosely based on the Linux serial driver, written by
* Linus Torvalds, Theodore T'so and others.
*
* 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.
*/
/*****************************************************************************/
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/interrupt.h>
#include <linux/termios.h>
#include <linux/fcntl.h>
#include <linux/tty_driver.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/serial.h>
#include <linux/cd1400.h>
#include <linux/comstats.h>
#include <linux/stallion.h>
#include <linux/string.h>
#include <linux/malloc.h>
#include <linux/ioport.h>
#include <linux/config.h> /* for CONFIG_PCI */
#include <asm/system.h>
#include <asm/io.h>
#include <asm/segment.h>
#ifdef CONFIG_PCI
#include <linux/pci.h>
#include <linux/bios32.h>
#endif
/*****************************************************************************/
/*
* Define different board types. At the moment I have only declared
* those boards that this driver supports. But I will use the standard
* "assigned" board numbers. In the future this driver will support
* some of the other Stallion boards. Currently supported boards are
* abbreviated as EIO = EasyIO and ECH = EasyConnection 8/32.
*/
#define BRD_EASYIO 20
#define BRD_ECH 21
#define BRD_ECHMC 22
#define BRD_ECHPCI 26
/*
* Define a configuration structure to hold the board configuration.
* Need to set this up in the code (for now) with the boards that are
* to be configured into the system. This is what needs to be modified
* when adding/removing/modifying boards. Each line entry in the
* stl_brdconf[] array is a board. Each line contains io/irq/memory
* ranges for that board (as well as what type of board it is).
* Some examples:
* { BRD_EASYIO, 0x2a0, 0, 0, 10, 0 }
* This line would configure an EasyIO board (4 or 8, no difference),
* at io address 2a0 and irq 10.
* Another example:
* { BRD_ECH, 0x2a8, 0x280, 0, 12, 0 },
* This line will configure an EasyConnection 8/32 board at primary io
* address 2a8, secondary io address 280 and irq 12.
* Enter as many lines into this array as you want (only the first 4
* will actually be used!). Any combination of EasyIO and EasyConnection
* boards can be specified. EasyConnection 8/32 boards can share their
* secondary io addresses between each other.
*
* NOTE: there is no need to put any entries in this table for PCI
* boards. They will be found automatically by the driver - provided
* PCI BIOS32 support is compiled into the kernel.
*/
typedef struct {
int brdtype;
int ioaddr1;
int ioaddr2;
unsigned long memaddr;
int irq;
int irqtype;
} stlconf_t;
static stlconf_t stl_brdconf[] = {
{ BRD_EASYIO, 0x2a0, 0, 0, 10, 0 },
};
static int stl_nrbrds = sizeof(stl_brdconf) / sizeof(stlconf_t);
/*****************************************************************************/
/*
* Define some important driver characteristics. Device major numbers
* allocated as per Linux Device Registry.
*/
#ifndef STL_SIOMEMMAJOR
#define STL_SIOMEMMAJOR 28
#endif
#ifndef STL_SERIALMAJOR
#define STL_SERIALMAJOR 24
#endif
#ifndef STL_CALLOUTMAJOR
#define STL_CALLOUTMAJOR 25
#endif
#define STL_DRVTYPSERIAL 1
#define STL_DRVTYPCALLOUT 2
/*
* I haven't really decided (or measured) what TX buffer size gives
* a good balance between performance and memory usage. These seem
* to work pretty well...
*/
#define STL_TXBUFLOW 256
#define STL_TXBUFSIZE 2048
/*****************************************************************************/
/*
* Define our local driver identity first. Set up stuff to deal with
* all the local structures required by a serial tty driver.
*/
static char *stl_drvname = "Stallion Multiport Serial Driver";
static char *stl_drvversion = "1.1.3";
static char *stl_serialname = "ttyE";
static char *stl_calloutname = "cue";
static struct tty_driver stl_serial;
static struct tty_driver stl_callout;
static struct tty_struct *stl_ttys[STL_MAXDEVS];
static struct termios *stl_termios[STL_MAXDEVS];
static struct termios *stl_termioslocked[STL_MAXDEVS];
static int stl_refcount = 0;
/*
* We will need to allocate a temporary write buffer for chars that
* come direct from user space. The problem is that a copy from user
* space might cause a page fault (typically on a system that is
* swapping!). All ports will share one buffer - since if the system
* is already swapping a shared buffer won't make things any worse.
*/
static char *stl_tmpwritebuf;
static struct semaphore stl_tmpwritesem = MUTEX;
/*
* Define a local default termios struct. All ports will be created
* with this termios initially. Basically all it defines is a raw port
* at 9600, 8 data bits, 1 stop bit.
*/
static struct termios stl_deftermios = {
0,
0,
(B9600 | CS8 | CREAD | HUPCL | CLOCAL),
0,
0,
INIT_C_CC
};
/*
* Define global stats structures. Not used often, and can be
* re-used for each stats call.
*/
static comstats_t stl_comstats;
static combrd_t stl_brdstats;
static stlbrd_t stl_dummybrd;
static stlport_t stl_dummyport;
/*
* Keep track of what interrupts we have requested for us.
* We don't need to request an interrupt twice if it is being
* shared with another Stallion board.
*/
static int stl_gotintrs[STL_MAXBRDS];
static int stl_numintrs = 0;
/*****************************************************************************/
static stlbrd_t *stl_brds[STL_MAXBRDS];
/*
* Per board state flags. Used with the state field of the board struct.
* Not really much here yet!
*/
#define BRD_FOUND 0x1
/*
* Define the port structure istate flags. These set of flags are
* modified at interrupt time - so setting and reseting them needs
* to be atomic. Use the bit clear/setting routines for this.
*/
#define ASYI_TXBUSY 1
#define ASYI_TXLOW 2
#define ASYI_DCDCHANGE 3
/*
* Define an array of board names as printable strings. Handy for
* referencing boards when printing trace and stuff.
*/
static char *stl_brdnames[] = {
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
"EasyIO",
"EC8/32-AT",
"EC8/32-MC",
(char *) NULL,
(char *) NULL,
(char *) NULL,
"EC8/32-PCI",
};
/*****************************************************************************/
/*
* Hardware ID bits for the EasyIO and ECH boards. These defines apply
* to the directly accessible io ports of these boards (not the cd1400
* uarts - they are in cd1400.h).
*/
#define EIO_8PORTRS 0x04
#define EIO_4PORTRS 0x05
#define EIO_8PORTDI 0x00
#define EIO_8PORTM 0x06
#define EIO_IDBITMASK 0x07
#define EIO_INTRPEND 0x08
#define EIO_INTEDGE 0x00
#define EIO_INTLEVEL 0x08
#define ECH_ID 0xa0
#define ECH_IDBITMASK 0xe0
#define ECH_BRDENABLE 0x08
#define ECH_BRDDISABLE 0x00
#define ECH_INTENABLE 0x01
#define ECH_INTDISABLE 0x00
#define ECH_INTLEVEL 0x02
#define ECH_INTEDGE 0x00
#define ECH_INTRPEND 0x01
#define ECH_BRDRESET 0x01
#define ECHMC_INTENABLE 0x01
#define ECHMC_BRDRESET 0x02
#define ECH_PNLSTATUS 2
#define ECH_PNL16PORT 0x20
#define ECH_PNLIDMASK 0x07
#define ECH_PNLINTRPEND 0x80
#define ECH_ADDR2MASK 0x1e0
#define EIO_CLK 25000000
#define EIO_CLK8M 20000000
#define ECH_CLK EIO_CLK
/*
* Define the offsets within the register bank for all io registers.
* These io address offsets are common to both the EIO and ECH.
*/
#define EREG_ADDR 0
#define EREG_DATA 4
#define EREG_RXACK 5
#define EREG_TXACK 6
#define EREG_MDACK 7
#define EREG_BANKSIZE 8
/*
* Define the vector mapping bits for the programmable interrupt board
* hardware. These bits encode the interrupt for the board to use - it
* is software selectable (except the EIO-8M).
*/
static unsigned char stl_vecmap[] = {
0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07,
0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03
};
/*
* Set up enable and disable macros for the ECH boards. They require
* the secondary io address space to be activated and deactivated.
* This way all ECH boards can share their secondary io region.
* If this is an ECH-PCI board then also need to set the page pointer
* to point to the correct page.
*/
#define BRDENABLE(brdnr,pagenr) \
if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \
stl_brds[(brdnr)]->ioctrl); \
else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \
outb((pagenr), stl_brds[(brdnr)]->ioctrl);
#define BRDDISABLE(brdnr) \
if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \
stl_brds[(brdnr)]->ioctrl);
/*
* Define the cd1400 baud rate clocks. These are used when calculating
* what clock and divisor to use for the required baud rate. Also
* define the maximum baud rate allowed, and the default base baud.
*/
static int stl_cd1400clkdivs[] = {
CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4
};
#define STL_MAXBAUD 230400
#define STL_BAUDBASE 115200
#define STL_CLOSEDELAY 50
/*****************************************************************************/
/*
* Define macros to extract a brd/port number from a minor number.
*/
#define MKDEV2BRD(min) (((min) & 0xc0) >> 6)
#define MKDEV2PORT(min) ((min) & 0x3f)
/*
* Define a baud rate table that converts termios baud rate selector
* into the actual baud rate value. All baud rate calculates are based
* on the actual baud rate required.
*/
static unsigned int stl_baudrates[] = {
0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
9600, 19200, 38400, 57600, 115200, 230400
};
/*****************************************************************************/
/*
* Define some handy local macros...
*/
#ifndef MIN
#define MIN(a,b) (((a) <= (b)) ? (a) : (b))
#endif
/*****************************************************************************/
/*
* Declare all those functions in this driver!
*/
#ifdef MODULE
int init_module(void);
void cleanup_module(void);
#endif
int stl_init(void);
static int stl_open(struct tty_struct *tty, struct file *filp);
static void stl_close(struct tty_struct *tty, struct file *filp);
static int stl_write(struct tty_struct *tty, int from_user, const unsigned char *buf, int count);
static void stl_putchar(struct tty_struct *tty, unsigned char ch);
static void stl_flushchars(struct tty_struct *tty);
static int stl_writeroom(struct tty_struct *tty);
static int stl_charsinbuffer(struct tty_struct *tty);
static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
static void stl_settermios(struct tty_struct *tty, struct termios *old);
static void stl_throttle(struct tty_struct *tty);
static void stl_unthrottle(struct tty_struct *tty);
static void stl_stop(struct tty_struct *tty);
static void stl_start(struct tty_struct *tty);
static void stl_flushbuffer(struct tty_struct *tty);
static void stl_hangup(struct tty_struct *tty);
static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
static int stl_initbrds(void);
static int stl_brdinit(stlbrd_t *brdp);
static int stl_initeio(stlbrd_t *brdp);
static int stl_initech(stlbrd_t *brdp);
static int stl_initports(stlbrd_t *brdp, stlpanel_t *panelp);
static int stl_mapirq(int irq);
static void stl_getserial(stlport_t *portp, struct serial_struct *sp);
static int stl_setserial(stlport_t *portp, struct serial_struct *sp);
static int stl_getbrdstats(combrd_t *bp);
static int stl_getportstats(stlport_t *portp, comstats_t *cp);
static int stl_clrportstats(stlport_t *portp, comstats_t *cp);
static int stl_getportstruct(unsigned long arg);
static int stl_getbrdstruct(unsigned long arg);
static void stl_setreg(stlport_t *portp, int regnr, int value);
static int stl_getreg(stlport_t *portp, int regnr);
static int stl_updatereg(stlport_t *portp, int regnr, int value);
static void stl_setport(stlport_t *portp, struct termios *tiosp);
static int stl_getsignals(stlport_t *portp);
static void stl_setsignals(stlport_t *portp, int dtr, int rts);
static void stl_ccrwait(stlport_t *portp);
static void stl_enablerxtx(stlport_t *portp, int rx, int tx);
static void stl_startrxtx(stlport_t *portp, int rx, int tx);
static void stl_disableintrs(stlport_t *portp);
static void stl_sendbreak(stlport_t *portp, long len);
static int stl_waitcarrier(stlport_t *portp, struct file *filp);
static void stl_delay(int len);
static void stl_intr(int irq, void *dev_id, struct pt_regs *regs);
static void stl_offintr(void *private);
static void *stl_memalloc(int len);
static stlport_t *stl_getport(int brdnr, int panelnr, int portnr);
#ifdef CONFIG_PCI
static int stl_findpcibrds(void);
#endif
/*****************************************************************************/
/*
* Define the driver info for a user level control device. Used mainly
* to get at port stats - only not using the port device itself.
*/
static struct file_operations stl_fsiomem = {
NULL,
NULL,
NULL,
NULL,
NULL,
stl_memioctl,
NULL,
NULL,
NULL,
NULL
};
/*****************************************************************************/
#ifdef MODULE
/*
* Loadable module initialization stuff.
*/
int init_module()
{
unsigned long flags;
#if DEBUG
printk("init_module()\n");
#endif
save_flags(flags);
cli();
stl_init();
restore_flags(flags);
return(0);
}
/*****************************************************************************/
void cleanup_module()
{
stlbrd_t *brdp;
stlpanel_t *panelp;
stlport_t *portp;
unsigned long flags;
int i, j, k;
#if DEBUG
printk("cleanup_module()\n");
#endif
printk(KERN_INFO "Unloading %s: version %s\n", stl_drvname, stl_drvversion);
save_flags(flags);
cli();
/*
* Free up all allocated resources used by the ports. This includes
* memory and interrupts. As part of this process we will also do
* a hangup on every open port - to try to flush out any processes
* hanging onto ports.
*/
i = tty_unregister_driver(&stl_serial);
j = tty_unregister_driver(&stl_callout);
if (i || j) {
printk("STALLION: failed to un-register tty driver, errno=%d,%d\n", -i, -j);
restore_flags(flags);
return;
}
if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
printk("STALLION: failed to un-register serial memory device, errno=%d\n", -i);
if (stl_tmpwritebuf != (char *) NULL)
kfree_s(stl_tmpwritebuf, STL_TXBUFSIZE);
for (i = 0; (i < stl_nrbrds); i++) {
brdp = stl_brds[i];
for (j = 0; (j < STL_MAXPANELS); j++) {
panelp = brdp->panels[j];
if (panelp != (stlpanel_t *) NULL) {
for (k = 0; (k < STL_PORTSPERPANEL); k++) {
portp = panelp->ports[k];
if (portp != (stlport_t *) NULL) {
if (portp->tty != (struct tty_struct *) NULL)
stl_hangup(portp->tty);
if (portp->tx.buf != (char *) NULL)
kfree_s(portp->tx.buf, STL_TXBUFSIZE);
kfree_s(portp, sizeof(stlport_t));
}
}
kfree_s(panelp, sizeof(stlpanel_t));
}
}
if (brdp->brdtype == BRD_ECH) {
release_region(brdp->ioaddr1, 2);
release_region(brdp->ioaddr2, 32);
} else if (brdp->brdtype == BRD_ECHPCI) {
release_region(brdp->ioaddr1, 4);
release_region(brdp->ioaddr2, 8);
} else if (brdp->brdtype == BRD_ECHMC) {
release_region(brdp->ioaddr1, 64);
} else if (brdp->brdtype == BRD_EASYIO) {
release_region(brdp->ioaddr1, 8);
}
kfree_s(brdp, sizeof(stlbrd_t));
stl_brds[i] = (stlbrd_t *) NULL;
}
for (i = 0; (i < stl_numintrs); i++)
free_irq(stl_gotintrs[i], NULL);
restore_flags(flags);
}
#endif
/*****************************************************************************/
/*
* Local driver kernel memory allocation routine.
*/
static void *stl_memalloc(int len)
{
return((void *) kmalloc(len, GFP_KERNEL));
}
/*****************************************************************************/
static int stl_open(struct tty_struct *tty, struct file *filp)
{
stlport_t *portp;
stlbrd_t *brdp;
unsigned int minordev;
int brdnr, panelnr, portnr, rc;
#if DEBUG
printk("stl_open(tty=%x,filp=%x): device=%x\n", (int) tty, (int) filp, tty->device);
#endif
minordev = MINOR(tty->device);
brdnr = MKDEV2BRD(minordev);
if (brdnr >= stl_nrbrds)
return(-ENODEV);
brdp = stl_brds[brdnr];
if (brdp == (stlbrd_t *) NULL)
return(-ENODEV);
minordev = MKDEV2PORT(minordev);
for (portnr = -1, panelnr = 0; (panelnr < STL_MAXPANELS); panelnr++) {
if (brdp->panels[panelnr] == (stlpanel_t *) NULL)
break;
if (minordev < brdp->panels[panelnr]->nrports) {
portnr = minordev;
break;
}
minordev -= brdp->panels[panelnr]->nrports;
}
if (portnr < 0)
return(-ENODEV);
portp = brdp->panels[panelnr]->ports[portnr];
if (portp == (stlport_t *) NULL)
return(-ENODEV);
/*
* On the first open of the device setup the port hardware, and
* initialize the per port data structure.
*/
portp->tty = tty;
tty->driver_data = portp;
portp->refcount++;
if ((portp->flags & ASYNC_INITIALIZED) == 0) {
if (portp->tx.buf == (char *) NULL) {
portp->tx.buf = (char *) stl_memalloc(STL_TXBUFSIZE);
if (portp->tx.buf == (char *) NULL)
return(-ENOMEM);
portp->tx.head = portp->tx.buf;
portp->tx.tail = portp->tx.buf;
}
stl_setport(portp, tty->termios);
portp->sigs = stl_getsignals(portp);
stl_setsignals(portp, 1, 1);
stl_enablerxtx(portp, 1, 1);
stl_startrxtx(portp, 1, 0);
clear_bit(TTY_IO_ERROR, &tty->flags);
portp->flags |= ASYNC_INITIALIZED;
}
/*
* Check if this port is in the middle of closing. If so then wait
* until it is closed then return error status, based on flag settings.
* The sleep here does not need interrupt protection since the wakeup
* for it is done with the same context.
*/
if (portp->flags & ASYNC_CLOSING) {
interruptible_sleep_on(&portp->close_wait);
if (portp->flags & ASYNC_HUP_NOTIFY)
return(-EAGAIN);
return(-ERESTARTSYS);
}
/*
* Based on type of open being done check if it can overlap with any
* previous opens still in effect. If we are a normal serial device
* then also we might have to wait for carrier.
*/
if (tty->driver.subtype == STL_DRVTYPCALLOUT) {
if (portp->flags & ASYNC_NORMAL_ACTIVE)
return(-EBUSY);
if (portp->flags & ASYNC_CALLOUT_ACTIVE) {
if ((portp->flags & ASYNC_SESSION_LOCKOUT) &&
(portp->session != current->session))
return(-EBUSY);
if ((portp->flags & ASYNC_PGRP_LOCKOUT) &&
(portp->pgrp != current->pgrp))
return(-EBUSY);
}
portp->flags |= ASYNC_CALLOUT_ACTIVE;
} else {
if (filp->f_flags & O_NONBLOCK) {
if (portp->flags & ASYNC_CALLOUT_ACTIVE)
return(-EBUSY);
} else {
if ((rc = stl_waitcarrier(portp, filp)) != 0)
return(rc);
}
portp->flags |= ASYNC_NORMAL_ACTIVE;
}
if ((portp->refcount == 1) && (portp->flags & ASYNC_SPLIT_TERMIOS)) {
if (tty->driver.subtype == STL_DRVTYPSERIAL)
*tty->termios = portp->normaltermios;
else
*tty->termios = portp->callouttermios;
stl_setport(portp, tty->termios);
}
portp->session = current->session;
portp->pgrp = current->pgrp;
return(0);
}
/*****************************************************************************/
/*
* Possibly need to wait for carrier (DCD signal) to come high. Say
* maybe because if we are clocal then we don't need to wait...
*/
static int stl_waitcarrier(stlport_t *portp, struct file *filp)
{
unsigned long flags;
int rc, doclocal;
#if DEBUG
printk("stl_waitcarrier(portp=%x,filp=%x)\n", (int) portp, (int) filp);
#endif
rc = 0;
doclocal = 0;
if (portp->flags & ASYNC_CALLOUT_ACTIVE) {
if (portp->normaltermios.c_cflag & CLOCAL)
doclocal++;
} else {
if (portp->tty->termios->c_cflag & CLOCAL)
doclocal++;
}
save_flags(flags);
cli();
portp->openwaitcnt++;
if (portp->refcount > 0)
portp->refcount--;
for (;;) {
if ((portp->flags & ASYNC_CALLOUT_ACTIVE) == 0)
stl_setsignals(portp, 1, 1);
if (tty_hung_up_p(filp) || ((portp->flags & ASYNC_INITIALIZED) == 0)) {
if (portp->flags & ASYNC_HUP_NOTIFY)
rc = -EBUSY;
else
rc = -ERESTARTSYS;
break;
}
if (((portp->flags & ASYNC_CALLOUT_ACTIVE) == 0) &&
((portp->flags & ASYNC_CLOSING) == 0) &&
(doclocal || (portp->sigs & TIOCM_CD))) {
break;
}
if (current->signal & ~current->blocked) {
rc = -ERESTARTSYS;
break;
}
interruptible_sleep_on(&portp->open_wait);
}
if (! tty_hung_up_p(filp))
portp->refcount++;
portp->openwaitcnt--;
restore_flags(flags);
return(rc);
}
/*****************************************************************************/
static void stl_close(struct tty_struct *tty, struct file *filp)
{
stlport_t *portp;
unsigned long flags;
#if DEBUG
printk("stl_close(tty=%x,filp=%x)\n", (int) tty, (int) filp);
#endif
portp = tty->driver_data;
if (portp == (stlport_t *) NULL)
return;
save_flags(flags);
cli();
if (tty_hung_up_p(filp)) {
restore_flags(flags);
return;
}
if (portp->refcount-- > 1) {
restore_flags(flags);
return;
}
portp->refcount = 0;
portp->flags |= ASYNC_CLOSING;
if (portp->flags & ASYNC_NORMAL_ACTIVE)
portp->normaltermios = *tty->termios;
if (portp->flags & ASYNC_CALLOUT_ACTIVE)
portp->callouttermios = *tty->termios;
/*
* May want to wait for any data to drain before closing. The BUSY
* flag keeps track of whether we are still sending or not - it allows
* for the FIFO in the cd1400.
*/
tty->closing = 1;
if (test_bit(ASYI_TXBUSY, &portp->istate)) {
if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
tty_wait_until_sent(tty, portp->closing_wait);
}
portp->flags &= ~ASYNC_INITIALIZED;
stl_disableintrs(portp);
if (tty->termios->c_cflag & HUPCL)
stl_setsignals(portp, 0, 0);
stl_enablerxtx(portp, 0, 0);
stl_flushbuffer(tty);
portp->istate = 0;
if (portp->tx.buf != (char *) NULL) {
kfree_s(portp->tx.buf, STL_TXBUFSIZE);
portp->tx.buf = (char *) NULL;
portp->tx.head = (char *) NULL;
portp->tx.tail = (char *) NULL;
}
set_bit(TTY_IO_ERROR, &tty->flags);
if (tty->ldisc.flush_buffer)
(tty->ldisc.flush_buffer)(tty);
tty->closing = 0;
tty->driver_data = (void *) NULL;
portp->tty = (struct tty_struct *) NULL;
if (portp->openwaitcnt) {
if (portp->close_delay)
stl_delay(portp->close_delay);
wake_up_interruptible(&portp->open_wait);
}
portp->flags &= ~(ASYNC_CALLOUT_ACTIVE | ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
wake_up_interruptible(&portp->close_wait);
restore_flags(flags);
}
/*****************************************************************************/
/*
* Wait for a specified delay period, this is not a busy-loop. It will
* give up the processor while waiting. Unfortunately this has some
* rather intimate knowledge of the process management stuff.
*/
static void stl_delay(int len)
{
#if DEBUG
printk("stl_delay(len=%d)\n", len);
#endif
if (len > 0) {
current->state = TASK_INTERRUPTIBLE;
current->timeout = jiffies + len;
schedule();
}
}
/*****************************************************************************/
/*
* Write routine. Take data and stuff it in to the TX ring queue.
* If transmit interrupts are not running then start them.
*/
static int stl_write(struct tty_struct *tty, int from_user, const unsigned char *buf, int count)
{
stlport_t *portp;
unsigned int len, stlen;
unsigned long flags;
unsigned char *chbuf;
char *head, *tail;
#if DEBUG
printk("stl_write(tty=%x,from_user=%d,buf=%x,count=%d)\n", (int) tty, from_user, (int) buf, count);
#endif
if ((tty == (struct tty_struct *) NULL) || (stl_tmpwritebuf == (char *) NULL))
return(0);
portp = tty->driver_data;
if (portp == (stlport_t *) NULL)
return(0);
if (portp->tx.buf == (char *) NULL)
return(0);
/*
* If copying direct from user space we must cater for page faults,
* causing us to "sleep" here for a while. To handle this copy in all
* the data we need now, into a local buffer. Then when we got it all
* copy it into the TX buffer.
*/
chbuf = (unsigned char *) buf;
if (from_user) {
head = portp->tx.head;
tail = portp->tx.tail;
len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) :
(tail - head - 1);
count = MIN(len, count);
save_flags(flags);
cli();
down(&stl_tmpwritesem);
memcpy_fromfs(stl_tmpwritebuf, chbuf, count);
up(&stl_tmpwritesem);
restore_flags(flags);
chbuf = &stl_tmpwritebuf[0];
}
head = portp->tx.head;
tail = portp->tx.tail;
if (head >= tail) {
len = STL_TXBUFSIZE - (head - tail) - 1;
stlen = STL_TXBUFSIZE - (head - portp->tx.buf);
} else {
len = tail - head - 1;
stlen = len;
}
len = MIN(len, count);
count = 0;
while (len > 0) {
stlen = MIN(len, stlen);
memcpy(head, chbuf, stlen);
len -= stlen;
chbuf += stlen;
count += stlen;
head += stlen;
if (head >= (portp->tx.buf + STL_TXBUFSIZE)) {
head = portp->tx.buf;
stlen = tail - head;
}
}
portp->tx.head = head;
clear_bit(ASYI_TXLOW, &portp->istate);
stl_startrxtx(portp, -1, 1);
return(count);
}
/*****************************************************************************/
static void stl_putchar(struct tty_struct *tty, unsigned char ch)
{
stlport_t *portp;
unsigned int len;
char *head, *tail;
#if DEBUG
printk("stl_putchar(tty=%x,ch=%x)\n", (int) tty, (int) ch);
#endif
if (tty == (struct tty_struct *) NULL)
return;
portp = tty->driver_data;
if (portp == (stlport_t *) NULL)
return;
if (portp->tx.buf == (char *) NULL)
return;
head = portp->tx.head;
tail = portp->tx.tail;
len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head);
len--;
if (len > 0) {
*head++ = ch;
if (head >= (portp->tx.buf + STL_TXBUFSIZE))
head = portp->tx.buf;
}
portp->tx.head = head;
}
/*****************************************************************************/
/*
* If there are any characters in the buffer then make sure that TX
* interrupts are on and get'em out. Normally used after the putchar
* routine has been called.
*/
static void stl_flushchars(struct tty_struct *tty)
{
stlport_t *portp;
#if DEBUG
printk("stl_flushchars(tty=%x)\n", (int) tty);
#endif
if (tty == (struct tty_struct *) NULL)
return;
portp = tty->driver_data;
if (portp == (stlport_t *) NULL)
return;
if (portp->tx.buf == (char *) NULL)
return;
#if 0
if (tty->stopped || tty->hw_stopped || (portp->tx.head == portp->tx.tail))
return;
#endif
stl_startrxtx(portp, -1, 1);
}
/*****************************************************************************/
static int stl_writeroom(struct tty_struct *tty)
{
stlport_t *portp;
char *head, *tail;
#if DEBUG
printk("stl_writeroom(tty=%x)\n", (int) tty);
#endif
if (tty == (struct tty_struct *) NULL)
return(0);
portp = tty->driver_data;
if (portp == (stlport_t *) NULL)
return(0);
if (portp->tx.buf == (char *) NULL)
return(0);
head = portp->tx.head;
tail = portp->tx.tail;
return((head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1));
}
/*****************************************************************************/
/*
* Return number of chars in the TX buffer. Normally we would just
* calculate the number of chars in the buffer and return that, but if
* the buffer is empty and TX interrupts are still on then we return
* that the buffer still has 1 char in it. This way whoever called us
* will not think that ALL chars have drained - since the UART still
* must have some chars in it (we are busy after all).
*/
static int stl_charsinbuffer(struct tty_struct *tty)
{
stlport_t *portp;
unsigned int size;
char *head, *tail;
#if DEBUG
printk("stl_charsinbuffer(tty=%x)\n", (int) tty);
#endif
if (tty == (struct tty_struct *) NULL)
return(0);
portp = tty->driver_data;
if (portp == (stlport_t *) NULL)
return(0);
if (portp->tx.buf == (char *) NULL)
return(0);
head = portp->tx.head;
tail = portp->tx.tail;
size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate))
size = 1;
return(size);
}
/*****************************************************************************/
/*
* Generate the serial struct info.
*/
static void stl_getserial(stlport_t *portp, struct serial_struct *sp)
{
struct serial_struct sio;
stlbrd_t *brdp;
#if DEBUG
printk("stl_getserial(portp=%x,sp=%x)\n", (int) portp, (int) sp);
#endif
memset(&sio, 0, sizeof(struct serial_struct));
sio.type = PORT_CIRRUS;
sio.line = portp->portnr;
sio.port = portp->ioaddr;
sio.flags = portp->flags;
sio.baud_base = portp->baud_base;
sio.close_delay = portp->close_delay;
sio.closing_wait = portp->closing_wait;
sio.custom_divisor = portp->custom_divisor;
sio.xmit_fifo_size = CD1400_TXFIFOSIZE;
sio.hub6 = 0;
brdp = stl_brds[portp->brdnr];
if (brdp != (stlbrd_t *) NULL)
sio.irq = brdp->irq;
memcpy_tofs(sp, &sio, sizeof(struct serial_struct));
}
/*****************************************************************************/
/*
* Set port according to the serial struct info.
* At this point we do not do any auto-configure stuff, so we will
* just quietly ignore any requests to change irq, etc.
*/
static int stl_setserial(stlport_t *portp, struct serial_struct *sp)
{
struct serial_struct sio;
#if DEBUG
printk("stl_setserial(portp=%x,sp=%x)\n", (int) portp, (int) sp);
#endif
memcpy_fromfs(&sio, sp, sizeof(struct serial_struct));
if (!suser()) {
if ((sio.baud_base != portp->baud_base) ||
(sio.close_delay != portp->close_delay) ||
((sio.flags & ~ASYNC_USR_MASK) != (portp->flags & ~ASYNC_USR_MASK)))
return(-EPERM);
}
portp->flags = (portp->flags & ~ASYNC_USR_MASK) | (sio.flags & ASYNC_USR_MASK);
portp->baud_base = sio.baud_base;
portp->close_delay = sio.close_delay;
portp->closing_wait = sio.closing_wait;
portp->custom_divisor = sio.custom_divisor;
stl_setport(portp, portp->tty->termios);
return(0);
}
/*****************************************************************************/
static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
{
stlport_t *portp;
unsigned long val;
int rc;
#if DEBUG
printk("stl_ioctl(tty=%x,file=%x,cmd=%x,arg=%x)\n", (int) tty, (int) file, cmd, (int) arg);
#endif
if (tty == (struct tty_struct *) NULL)
return(-ENODEV);
portp = tty->driver_data;
if (portp == (stlport_t *) NULL)
return(-ENODEV);
rc = 0;
switch (cmd) {
case TCSBRK:
if ((rc = tty_check_change(tty)) == 0) {
tty_wait_until_sent(tty, 0);
if (! arg)
stl_sendbreak(portp, 250);
}
break;
case TCSBRKP:
if ((rc = tty_check_change(tty)) == 0) {
tty_wait_until_sent(tty, 0);
stl_sendbreak(portp, (arg ? (arg * 100) : 250));
}
break;
case TIOCGSOFTCAR:
if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(long))) == 0)
put_fs_long(((tty->termios->c_cflag & CLOCAL) ? 1 : 0), (unsigned long *) arg);
break;
case TIOCSSOFTCAR:
if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(long))) == 0) {
arg = get_fs_long((unsigned long *) arg);
tty->termios->c_cflag = (tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0);
}
break;
case TIOCMGET:
if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(unsigned int))) == 0) {
val = (unsigned long) stl_getsignals(portp);
put_fs_long(val, (unsigned long *) arg);
}
break;
case TIOCMBIS:
if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(long))) == 0) {
arg = get_fs_long((unsigned long *) arg);
stl_setsignals(portp, ((arg & TIOCM_DTR) ? 1 : -1), ((arg & TIOCM_RTS) ? 1 : -1));
}
break;
case TIOCMBIC:
if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(long))) == 0) {
arg = get_fs_long((unsigned long *) arg);
stl_setsignals(portp, ((arg & TIOCM_DTR) ? 0 : -1), ((arg & TIOCM_RTS) ? 0 : -1));
}
break;
case TIOCMSET:
if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(long))) == 0) {
arg = get_fs_long((unsigned long *) arg);
stl_setsignals(portp, ((arg & TIOCM_DTR) ? 1 : 0), ((arg & TIOCM_RTS) ? 1 : 0));
}
break;
case TIOCGSERIAL:
if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(struct serial_struct))) == 0)
stl_getserial(portp, (struct serial_struct *) arg);
break;
case TIOCSSERIAL:
if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(struct serial_struct))) == 0)
rc = stl_setserial(portp, (struct serial_struct *) arg);
break;
case COM_GETPORTSTATS:
if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(comstats_t))) == 0)
rc = stl_getportstats(portp, (comstats_t *) arg);
break;
case COM_CLRPORTSTATS:
if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(comstats_t))) == 0)
rc = stl_clrportstats(portp, (comstats_t *) arg);
break;
case TIOCSERCONFIG:
case TIOCSERGWILD:
case TIOCSERSWILD:
case TIOCSERGETLSR:
case TIOCSERGSTRUCT:
case TIOCSERGETMULTI:
case TIOCSERSETMULTI:
default:
rc = -ENOIOCTLCMD;
break;
}
return(rc);
}
/*****************************************************************************/
static void stl_settermios(struct tty_struct *tty, struct termios *old)
{
stlport_t *portp;
struct termios *tiosp;
#if DEBUG
printk("stl_settermios(tty=%x,old=%x)\n", (int) tty, (int) old);
#endif
if (tty == (struct tty_struct *) NULL)
return;
portp = tty->driver_data;
if (portp == (stlport_t *) NULL)
return;
tiosp = tty->termios;
if ((tiosp->c_cflag == old->c_cflag) && (tiosp->c_iflag == old->c_iflag))
return;
stl_setport(portp, tiosp);
stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0), -1);
if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) {
tty->hw_stopped = 0;
stl_start(tty);
}
if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
wake_up_interruptible(&portp->open_wait);
}
/*****************************************************************************/
/*
* Attempt to flow control who ever is sending us data. Based on termios
* settings use software or/and hardware flow control.
*/
static void stl_throttle(struct tty_struct *tty)
{
stlport_t *portp;
unsigned long flags;
#if DEBUG
printk("stl_throttle(tty=%x)\n", (int) tty);
#endif
if (tty == (struct tty_struct *) NULL)
return;
portp = tty->driver_data;
if (portp == (stlport_t *) NULL)
return;
save_flags(flags);
cli();
BRDENABLE(portp->brdnr, portp->pagenr);
stl_setreg(portp, CAR, (portp->portnr & 0x03));
if (tty->termios->c_iflag & IXOFF) {
stl_ccrwait(portp);
stl_setreg(portp, CCR, CCR_SENDSCHR2);
portp->stats.rxxoff++;
stl_ccrwait(portp);
}
if (tty->termios->c_cflag & CRTSCTS) {
stl_setreg(portp, MCOR1, (stl_getreg(portp, MCOR1) & 0xf0));
stl_setreg(portp, MSVR2, 0);
portp->stats.rxrtsoff++;
}
BRDDISABLE(portp->brdnr);
restore_flags(flags);
}
/*****************************************************************************/
/*
* Unflow control the device sending us data...
*/
static void stl_unthrottle(struct tty_struct *tty)
{
stlport_t *portp;
unsigned long flags;
#if DEBUG
printk("stl_unthrottle(tty=%x)\n", (int) tty);
#endif
if (tty == (struct tty_struct *) NULL)
return;
portp = tty->driver_data;
if (portp == (stlport_t *) NULL)
return;
save_flags(flags);
cli();
BRDENABLE(portp->brdnr, portp->pagenr);
stl_setreg(portp, CAR, (portp->portnr & 0x03));
if (tty->termios->c_iflag & IXOFF) {
stl_ccrwait(portp);
stl_setreg(portp, CCR, CCR_SENDSCHR1);
portp->stats.rxxon++;
stl_ccrwait(portp);
}
/*
* Question: should we return RTS to what it was before? It may have
* been set by an ioctl... Suppose not, since if you have hardware
* flow control set then it is pretty silly to go and set the RTS line
* by hand.
*/
if (tty->termios->c_cflag & CRTSCTS) {
stl_setreg(portp, MCOR1, (stl_getreg(portp, MCOR1) | FIFO_RTSTHRESHOLD));
stl_setreg(portp, MSVR2, MSVR2_RTS);
portp->stats.rxrtson++;
}
BRDDISABLE(portp->brdnr);
restore_flags(flags);
}
/*****************************************************************************/
/*
* Stop the transmitter. Basically to do this we will just turn TX
* interrupts off.
*/
static void stl_stop(struct tty_struct *tty)
{
stlport_t *portp;
#if DEBUG
printk("stl_stop(tty=%x)\n", (int) tty);
#endif
if (tty == (struct tty_struct *) NULL)
return;
portp = tty->driver_data;
if (portp == (stlport_t *) NULL)
return;
stl_startrxtx(portp, -1, 0);
}
/*****************************************************************************/
/*
* Start the transmitter again. Just turn TX interrupts back on.
*/
static void stl_start(struct tty_struct *tty)
{
stlport_t *portp;
#if DEBUG
printk("stl_start(tty=%x)\n", (int) tty);
#endif
if (tty == (struct tty_struct *) NULL)
return;
portp = tty->driver_data;
if (portp == (stlport_t *) NULL)
return;
stl_startrxtx(portp, -1, 1);
}
/*****************************************************************************/
/*
* Hangup this port. This is pretty much like closing the port, only
* a little more brutal. No waiting for data to drain. Shutdown the
* port and maybe drop signals.
*/
static void stl_hangup(struct tty_struct *tty)
{
stlport_t *portp;
#if DEBUG
printk("stl_hangup(tty=%x)\n", (int) tty);
#endif
if (tty == (struct tty_struct *) NULL)
return;
portp = tty->driver_data;
if (portp == (stlport_t *) NULL)
return;
portp->flags &= ~ASYNC_INITIALIZED;
stl_disableintrs(portp);
if (tty->termios->c_cflag & HUPCL)
stl_setsignals(portp, 0, 0);
stl_enablerxtx(portp, 0, 0);
stl_flushbuffer(tty);
portp->istate = 0;
set_bit(TTY_IO_ERROR, &tty->flags);
if (portp->tx.buf != (char *) NULL) {
kfree_s(portp->tx.buf, STL_TXBUFSIZE);
portp->tx.buf = (char *) NULL;
portp->tx.head = (char *) NULL;
portp->tx.tail = (char *) NULL;
}
tty->driver_data = (void *) NULL;
portp->tty = (struct tty_struct *) NULL;
portp->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CALLOUT_ACTIVE);
portp->refcount = 0;
wake_up_interruptible(&portp->open_wait);
}
/*****************************************************************************/
static void stl_flushbuffer(struct tty_struct *tty)
{
stlport_t *portp;
unsigned long flags;
#if DEBUG
printk("stl_flushbuffer(tty=%x)\n", (int) tty);
#endif
if (tty == (struct tty_struct *) NULL)
return;
portp = tty->driver_data;
if (portp == (stlport_t *) NULL)
return;
save_flags(flags);
cli();
BRDENABLE(portp->brdnr, portp->pagenr);
stl_setreg(portp, CAR, (portp->portnr & 0x03));
stl_ccrwait(portp);
stl_setreg(portp, CCR, CCR_TXFLUSHFIFO);
stl_ccrwait(portp);
portp->tx.tail = portp->tx.head;
BRDDISABLE(portp->brdnr);
restore_flags(flags);
wake_up_interruptible(&tty->write_wait);
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
(tty->ldisc.write_wakeup)(tty);
}
/*****************************************************************************/
/*
* These functions get/set/update the registers of the cd1400 UARTs.
* Access to the cd1400 registers is via an address/data io port pair.
* (Maybe should make this inline...)
*/
static int stl_getreg(stlport_t *portp, int regnr)
{
outb((regnr + portp->uartaddr), portp->ioaddr);
return(inb(portp->ioaddr + EREG_DATA));
}
static void stl_setreg(stlport_t *portp, int regnr, int value)
{
outb((regnr + portp->uartaddr), portp->ioaddr);
outb(value, portp->ioaddr + EREG_DATA);
}
static int stl_updatereg(stlport_t *portp, int regnr, int value)
{
outb((regnr + portp->uartaddr), portp->ioaddr);
if (inb(portp->ioaddr + EREG_DATA) != value) {
outb(value, portp->ioaddr + EREG_DATA);
return(1);
}
return(0);
}
/*****************************************************************************/
/*
* Transmit interrupt handler. This has gotta be fast! Handling TX
* chars is pretty simple, stuff as many as possible from the TX buffer
* into the cd1400 FIFO. Must also handle TX breaks here, since they
* are embedded as commands in the data stream. Oh no, had to use a goto!
* This could be optimized more, will do when I get time...
* In practice it is possible that interrupts are enabled but that the
* port has been hung up. Need to handle not having any TX buffer here,
* this is done by using the side effect that head and tail will also
* be NULL if the buffer has been freed.
*/
static inline void stl_txisr(stlpanel_t *panelp, int ioaddr)
{
stlport_t *portp;
int len, stlen;
char *head, *tail;
unsigned char ioack, srer;
#if DEBUG
printk("stl_txisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr);
#endif
ioack = inb(ioaddr + EREG_TXACK);
if (((ioack & panelp->ackmask) != 0) || ((ioack & ACK_TYPMASK) != ACK_TYPTX)) {
printk("STALLION: bad TX interrupt ack value=%x\n", ioack);
return;
}
portp = panelp->ports[(ioack >> 3)];
/*
* Unfortunately we need to handle breaks in the data stream, since
* this is the only way to generate them on the cd1400. Do it now if
* a break is to be sent.
*/
if (portp->brklen != 0) {
if (portp->brklen > 0) {
outb((TDR + portp->uartaddr), ioaddr);
outb(ETC_CMD, (ioaddr + EREG_DATA));
outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
outb(ETC_CMD, (ioaddr + EREG_DATA));
outb(ETC_DELAY, (ioaddr + EREG_DATA));
outb(portp->brklen, (ioaddr + EREG_DATA));
outb(ETC_CMD, (ioaddr + EREG_DATA));
outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
portp->brklen = -1;
goto stl_txalldone;
} else {
outb((COR2 + portp->uartaddr), ioaddr);
outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC), (ioaddr + EREG_DATA));
portp->brklen = 0;
}
}
head = portp->tx.head;
tail = portp->tx.tail;
len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
if ((len == 0) || ((len < STL_TXBUFLOW) && (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
set_bit(ASYI_TXLOW, &portp->istate);
queue_task_irq_off(&portp->tqueue, &tq_scheduler);
}
if (len == 0) {
outb((SRER + portp->uartaddr), ioaddr);
srer = inb(ioaddr + EREG_DATA);
if (srer & SRER_TXDATA) {
srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY;
} else {
srer &= ~(SRER_TXDATA | SRER_TXEMPTY);
clear_bit(ASYI_TXBUSY, &portp->istate);
}
outb(srer, (ioaddr + EREG_DATA));
} else {
len = MIN(len, CD1400_TXFIFOSIZE);
portp->stats.txtotal += len;
stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
outb((TDR + portp->uartaddr), ioaddr);
outsb((ioaddr + EREG_DATA), tail, stlen);
len -= stlen;
tail += stlen;
if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
tail = portp->tx.buf;
if (len > 0) {
outsb((ioaddr + EREG_DATA), tail, len);
tail += len;
}
portp->tx.tail = tail;
}
stl_txalldone:
outb((EOSRR + portp->uartaddr), ioaddr);
outb(0, (ioaddr + EREG_DATA));
}
/*****************************************************************************/
/*
* Receive character interrupt handler. Determine if we have good chars
* or bad chars and then process appropriately. Good chars are easy
* just shove the lot into the RX buffer and set all status byte to 0.
* If a bad RX char then process as required. This routine needs to be
* fast! In practice it is possible that we get an interrupt on a port
* that is closed. This can happen on hangups - since they completely
* shutdown a port not in user context. Need to handle this case.
*/
static inline void stl_rxisr(stlpanel_t *panelp, int ioaddr)
{
stlport_t *portp;
struct tty_struct *tty;
unsigned int ioack, len, buflen;
unsigned char status;
char ch;
static char unwanted[CD1400_RXFIFOSIZE];
#if DEBUG
printk("stl_rxisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr);
#endif
ioack = inb(ioaddr + EREG_RXACK);
if ((ioack & panelp->ackmask) != 0) {
printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
return;
}
portp = panelp->ports[(ioack >> 3)];
tty = portp->tty;
if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
outb((RDCR + portp->uartaddr), ioaddr);
len = inb(ioaddr + EREG_DATA);
if ((tty == (struct tty_struct *) NULL) || (tty->flip.char_buf_ptr == (char *) NULL) ||
((buflen = TTY_FLIPBUF_SIZE - tty->flip.count) == 0)) {
outb((RDSR + portp->uartaddr), ioaddr);
insb((ioaddr + EREG_DATA), &unwanted[0], len);
portp->stats.rxlost += len;
portp->stats.rxtotal += len;
} else {
len = MIN(len, buflen);
if (len > 0) {
outb((RDSR + portp->uartaddr), ioaddr);
insb((ioaddr + EREG_DATA), tty->flip.char_buf_ptr, len);
memset(tty->flip.flag_buf_ptr, 0, len);
tty->flip.flag_buf_ptr += len;
tty->flip.char_buf_ptr += len;
tty->flip.count += len;
tty_schedule_flip(tty);
portp->stats.rxtotal += len;
}
}
} else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) {
outb((RDSR + portp->uartaddr), ioaddr);
status = inb(ioaddr + EREG_DATA);
ch = inb(ioaddr + EREG_DATA);
if (status & ST_PARITY)
portp->stats.rxparity++;
if (status & ST_FRAMING)
portp->stats.rxframing++;
if (status & ST_OVERRUN)
portp->stats.rxoverrun++;
if (status & ST_BREAK)
portp->stats.rxbreaks++;
if (status & ST_SCHARMASK) {
if ((status & ST_SCHARMASK) == ST_SCHAR1)
portp->stats.txxon++;
if ((status & ST_SCHARMASK) == ST_SCHAR2)
portp->stats.txxoff++;
goto stl_rxalldone;
}
if ((tty != (struct tty_struct *) NULL) && ((portp->rxignoremsk & status) == 0)) {
if (portp->rxmarkmsk & status) {
if (status & ST_BREAK) {
status = TTY_BREAK;
#ifndef MODULE
if (portp->flags & ASYNC_SAK) {
do_SAK(tty);
BRDENABLE(portp->brdnr, portp->pagenr);
}
#endif
} else if (status & ST_PARITY) {
status = TTY_PARITY;
} else if (status & ST_FRAMING) {
status = TTY_FRAME;
} else if(status & ST_OVERRUN) {
status = TTY_OVERRUN;
} else {
status = 0;
}
} else {
status = 0;
}
if (tty->flip.char_buf_ptr != (char *) NULL) {
if (tty->flip.count < TTY_FLIPBUF_SIZE) {
*tty->flip.flag_buf_ptr++ = status;
*tty->flip.char_buf_ptr++ = ch;
tty->flip.count++;
}
tty_schedule_flip(tty);
}
}
} else {
printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
return;
}
stl_rxalldone:
outb((EOSRR + portp->uartaddr), ioaddr);
outb(0, (ioaddr + EREG_DATA));
}
/*****************************************************************************/
/*
* Modem interrupt handler. The is called when the modem signal line
* (DCD) has changed state. Leave most of the work to the off-level
* processing routine.
*/
static inline void stl_mdmisr(stlpanel_t *panelp, int ioaddr)
{
stlport_t *portp;
unsigned int ioack;
unsigned char misr;
#if DEBUG
printk("stl_mdmisr(panelp=%x)\n", (int) panelp);
#endif
ioack = inb(ioaddr + EREG_MDACK);
if (((ioack & panelp->ackmask) != 0) || ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) {
printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack);
return;
}
portp = panelp->ports[(ioack >> 3)];
outb((MISR + portp->uartaddr), ioaddr);
misr = inb(ioaddr + EREG_DATA);
if (misr & MISR_DCD) {
set_bit(ASYI_DCDCHANGE, &portp->istate);
queue_task_irq_off(&portp->tqueue, &tq_scheduler);
portp->stats.modem++;
}
outb((EOSRR + portp->uartaddr), ioaddr);
outb(0, (ioaddr + EREG_DATA));
}
/*****************************************************************************/
/*
* Interrupt handler for EIO and ECH boards. This code ain't all that
* pretty, but the idea is to make it as fast as possible. This code is
* well suited to be assemblerized :-) We don't use the general purpose
* register access functions here, for speed we will go strait to the
* io region.
*/
static void stl_intr(int irq, void *dev_id, struct pt_regs *regs)
{
stlbrd_t *brdp;
stlpanel_t *panelp;
unsigned char svrtype;
int i, panelnr, iobase;
#if DEBUG
printk("stl_intr(irq=%d,regs=%x)\n", irq, (int) regs);
#endif
panelp = (stlpanel_t *) NULL;
for (i = 0; (i < stl_nrbrds); ) {
if ((brdp = stl_brds[i]) == (stlbrd_t *) NULL) {
i++;
continue;
}
if (brdp->state == 0) {
i++;
continue;
}
/*
* The following section of code handles the subtle differences
* between board types. It is sort of similar, but different
* enough to handle each separately.
*/
if (brdp->brdtype == BRD_EASYIO) {
if ((inb(brdp->iostatus) & EIO_INTRPEND) == 0) {
i++;
continue;
}
panelp = brdp->panels[0];
iobase = panelp->iobase;
outb(SVRR, iobase);
svrtype = inb(iobase + EREG_DATA);
if (brdp->nrports > 4) {
outb((SVRR + 0x80), iobase);
svrtype |= inb(iobase + EREG_DATA);
}
} else if (brdp->brdtype == BRD_ECH) {
if ((inb(brdp->iostatus) & ECH_INTRPEND) == 0) {
i++;
continue;
}
outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) {
panelp = brdp->panels[panelnr];
iobase = panelp->iobase;
if (inb(iobase + ECH_PNLSTATUS) & ECH_PNLINTRPEND)
break;
if (panelp->nrports > 8) {
iobase += 0x8;
if (inb(iobase + ECH_PNLSTATUS) & ECH_PNLINTRPEND)
break;
}
}
if (panelnr >= brdp->nrpanels) {
i++;
continue;
}
outb(SVRR, iobase);
svrtype = inb(iobase + EREG_DATA);
outb((SVRR + 0x80), iobase);
svrtype |= inb(iobase + EREG_DATA);
} else if (brdp->brdtype == BRD_ECHPCI) {
iobase = brdp->ioaddr2;
for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) {
panelp = brdp->panels[panelnr];
outb(panelp->pagenr, brdp->ioctrl);
if (inb(iobase + ECH_PNLSTATUS) & ECH_PNLINTRPEND)
break;
if (panelp->nrports > 8) {
outb((panelp->pagenr + 1), brdp->ioctrl);
if (inb(iobase + ECH_PNLSTATUS) & ECH_PNLINTRPEND)
break;
}
}
if (panelnr >= brdp->nrpanels) {
i++;
continue;
}
outb(SVRR, iobase);
svrtype = inb(iobase + EREG_DATA);
outb((SVRR + 0x80), iobase);
svrtype |= inb(iobase + EREG_DATA);
} else if (brdp->brdtype == BRD_ECHMC) {
if ((inb(brdp->iostatus) & ECH_INTRPEND) == 0) {
i++;
continue;
}
for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) {
panelp = brdp->panels[panelnr];
iobase = panelp->iobase;
if (inb(iobase + ECH_PNLSTATUS) & ECH_PNLINTRPEND)
break;
if (panelp->nrports > 8) {
iobase += 0x8;
if (inb(iobase + ECH_PNLSTATUS) & ECH_PNLINTRPEND)
break;
}
}
if (panelnr >= brdp->nrpanels) {
i++;
continue;
}
outb(SVRR, iobase);
svrtype = inb(iobase + EREG_DATA);
outb((SVRR + 0x80), iobase);
svrtype |= inb(iobase + EREG_DATA);
} else {
printk("STALLION: unknown board type=%x\n", brdp->brdtype);
i++;
continue;
}
/*
* We have determined what type of service is required for a
* port. From here on in the service of a port is the same no
* matter what the board type...
*/
if (svrtype & SVRR_RX)
stl_rxisr(panelp, iobase);
if (svrtype & SVRR_TX)
stl_txisr(panelp, iobase);
if (svrtype & SVRR_MDM)
stl_mdmisr(panelp, iobase);
if (brdp->brdtype == BRD_ECH)
outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
}
}
/*****************************************************************************/
/*
* Service an off-level request for some channel.
*/
static void stl_offintr(void *private)
{
stlport_t *portp;
struct tty_struct *tty;
unsigned int oldsigs;
portp = private;
#if DEBUG
printk("stl_offintr(portp=%x)\n", (int) portp);
#endif
if (portp == (stlport_t *) NULL)
return;
tty = portp->tty;
if (tty == (struct tty_struct *) NULL)
return;
if (test_bit(ASYI_TXLOW, &portp->istate)) {
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
(tty->ldisc.write_wakeup)(tty);
wake_up_interruptible(&tty->write_wait);
}
if (test_bit(ASYI_DCDCHANGE, &portp->istate)) {
clear_bit(ASYI_DCDCHANGE, &portp->istate);
oldsigs = portp->sigs;
portp->sigs = stl_getsignals(portp);
if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0))
wake_up_interruptible(&portp->open_wait);
if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) {
if (portp->flags & ASYNC_CHECK_CD) {
if (! ((portp->flags & ASYNC_CALLOUT_ACTIVE) &&
(portp->flags & ASYNC_CALLOUT_NOHUP))) {
tty_hangup(tty);
}
}
}
}
}
/*****************************************************************************/
/*
* Wait for the command register to be ready. We will poll this,
* since it won't usually take too long to be ready.
*/
static void stl_ccrwait(stlport_t *portp)
{
int i;
for (i = 0; (i < CCR_MAXWAIT); i++) {
if (stl_getreg(portp, CCR) == 0) {
return;
}
}
printk("STALLION: cd1400 device not responding, port=%d panel=%d brd=%d\n", portp->portnr, portp->panelnr, portp->brdnr);
}
/*****************************************************************************/
/*
* Set up the cd1400 registers for a port based on the termios port
* settings.
*/
static void stl_setport(stlport_t *portp, struct termios *tiosp)
{
stlbrd_t *brdp;
unsigned long flags;
unsigned int clkdiv, baudrate;
unsigned char cor1, cor2, cor3;
unsigned char cor4, cor5, ccr;
unsigned char srer, sreron, sreroff;
unsigned char mcor1, mcor2, rtpr;
unsigned char clk, div;
cor1 = 0;
cor2 = 0;
cor3 = 0;
cor4 = 0;
cor5 = 0;
ccr = 0;
rtpr = 0;
clk = 0;
div = 0;
mcor1 = 0;
mcor2 = 0;
sreron = 0;
sreroff = 0;
brdp = stl_brds[portp->brdnr];
if (brdp == (stlbrd_t *) NULL)
return;
/*
* Set up the RX char ignore mask with those RX error types we
* can ignore. We can get the cd1400 to help us out a little here,
* it will ignore parity errors and breaks for us.
*/
portp->rxignoremsk = 0;
if (tiosp->c_iflag & IGNPAR) {
portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN);
cor1 |= COR1_PARIGNORE;
}
if (tiosp->c_iflag & IGNBRK) {
portp->rxignoremsk |= ST_BREAK;
cor4 |= COR4_IGNBRK;
}
portp->rxmarkmsk = ST_OVERRUN;
if (tiosp->c_iflag & (INPCK | PARMRK))
portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING);
if (tiosp->c_iflag & BRKINT)
portp->rxmarkmsk |= ST_BREAK;
/*
* Go through the char size, parity and stop bits and set all the
* option register appropriately.
*/
switch (tiosp->c_cflag & CSIZE) {
case CS5:
cor1 |= COR1_CHL5;
break;
case CS6:
cor1 |= COR1_CHL6;
break;
case CS7:
cor1 |= COR1_CHL7;
break;
default:
cor1 |= COR1_CHL8;
break;
}
if (tiosp->c_cflag & CSTOPB)
cor1 |= COR1_STOP2;
else
cor1 |= COR1_STOP1;
if (tiosp->c_cflag & PARENB) {
if (tiosp->c_cflag & PARODD)
cor1 |= (COR1_PARENB | COR1_PARODD);
else
cor1 |= (COR1_PARENB | COR1_PAREVEN);
} else {
cor1 |= COR1_PARNONE;
}
/*
* Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
* space for hardware flow control and the like. This should be set to
* VMIN. Also here we will set the RX data timeout to 10ms - this should
* really be based on VTIME.
*/
cor3 |= FIFO_RXTHRESHOLD;
rtpr = 2;
/*
* Calculate the baud rate timers. For now we will just assume that
* the input and output baud are the same. Could have used a baud
* table here, but this way we can generate virtually any baud rate
* we like!
*/
baudrate = tiosp->c_cflag & CBAUD;
if (baudrate & CBAUDEX) {
baudrate &= ~CBAUDEX;
if ((baudrate < 1) || (baudrate > 2))
tiosp->c_cflag &= ~CBAUDEX;
else
baudrate += 15;
}
baudrate = stl_baudrates[baudrate];
if ((tiosp->c_cflag & CBAUD) == B38400) {
if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
baudrate = 57600;
else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
baudrate = 115200;
else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
baudrate = (portp->baud_base / portp->custom_divisor);
}
if (baudrate > STL_MAXBAUD)
baudrate = STL_MAXBAUD;
if (baudrate > 0) {
for (clk = 0; (clk < CD1400_NUMCLKS); clk++) {
clkdiv = ((portp->clk / stl_cd1400clkdivs[clk]) / baudrate);
if (clkdiv < 0x100)
break;
}
div = (unsigned char) clkdiv;
}
/*
* Check what form of modem signaling is required and set it up.
*/
if ((tiosp->c_cflag & CLOCAL) == 0) {
mcor1 |= MCOR1_DCD;
mcor2 |= MCOR2_DCD;
sreron |= SRER_MODEM;
portp->flags |= ASYNC_CHECK_CD;
} else {
portp->flags &= ~ASYNC_CHECK_CD;
}
/*
* Setup cd1400 enhanced modes if we can. In particular we want to
* handle as much of the flow control as possible automatically. As
* well as saving a few CPU cycles it will also greatly improve flow
* control reliability.
*/
if (tiosp->c_iflag & IXON) {
cor2 |= COR2_TXIBE;
cor3 |= COR3_SCD12;
if (tiosp->c_iflag & IXANY)
cor2 |= COR2_IXM;
}
if (tiosp->c_cflag & CRTSCTS) {
cor2 |= COR2_CTSAE;
mcor1 |= FIFO_RTSTHRESHOLD;
}
/*
* All register cd1400 register values calculated so go through and set
* them all up.
*/
#if DEBUG
printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", portp->portnr, portp->panelnr, portp->brdnr);
printk(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n", cor1, cor2, cor3, cor4, cor5);
printk(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n", mcor1, mcor2, rtpr, sreron, sreroff);
printk(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div);
printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n", tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
#endif
save_flags(flags);
cli();
BRDENABLE(portp->brdnr, portp->pagenr);
stl_setreg(portp, CAR, (portp->portnr & 0x3));
srer = stl_getreg(portp, SRER);
stl_setreg(portp, SRER, 0);
if (stl_updatereg(portp, COR1, cor1))
ccr = 1;
if (stl_updatereg(portp, COR2, cor2))
ccr = 1;
if (stl_updatereg(portp, COR3, cor3))
ccr = 1;
if (ccr) {
stl_ccrwait(portp);
stl_setreg(portp, CCR, CCR_CORCHANGE);
}
stl_setreg(portp, COR4, cor4);
stl_setreg(portp, COR5, cor5);
stl_setreg(portp, MCOR1, mcor1);
stl_setreg(portp, MCOR2, mcor2);
if (baudrate > 0) {
stl_setreg(portp, TCOR, clk);
stl_setreg(portp, TBPR, div);
stl_setreg(portp, RCOR, clk);
stl_setreg(portp, RBPR, div);
}
stl_setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
stl_setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
stl_setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
stl_setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
stl_setreg(portp, RTPR, rtpr);
mcor1 = stl_getreg(portp, MSVR1);
if (mcor1 & MSVR1_DCD)
portp->sigs |= TIOCM_CD;
else
portp->sigs &= ~TIOCM_CD;
stl_setreg(portp, SRER, ((srer & ~sreroff) | sreron));
BRDDISABLE(portp->brdnr);
restore_flags(flags);
}
/*****************************************************************************/
/*
* Set the state of the DTR and RTS signals.
*/
static void stl_setsignals(stlport_t *portp, int dtr, int rts)
{
unsigned char msvr1, msvr2;
unsigned long flags;
#if DEBUG
printk("stl_setsignals(portp=%x,dtr=%d,rts=%d)\n", (int) portp, dtr, rts);
#endif
msvr1 = 0;
msvr2 = 0;
if (dtr > 0)
msvr1 = MSVR1_DTR;
if (rts > 0)
msvr2 = MSVR2_RTS;
save_flags(flags);
cli();
BRDENABLE(portp->brdnr, portp->pagenr);
stl_setreg(portp, CAR, (portp->portnr & 0x03));
if (rts >= 0)
stl_setreg(portp, MSVR2, msvr2);
if (dtr >= 0)
stl_setreg(portp, MSVR1, msvr1);
BRDDISABLE(portp->brdnr);
restore_flags(flags);
}
/*****************************************************************************/
/*
* Return the state of the signals.
*/
static int stl_getsignals(stlport_t *portp)
{
unsigned char msvr1, msvr2;
unsigned long flags;
int sigs;
#if DEBUG
printk("stl_getsignals(portp=%x)\n", (int) portp);
#endif
save_flags(flags);
cli();
BRDENABLE(portp->brdnr, portp->pagenr);
stl_setreg(portp, CAR, (portp->portnr & 0x03));
msvr1 = stl_getreg(portp, MSVR1);
msvr2 = stl_getreg(portp, MSVR2);
BRDDISABLE(portp->brdnr);
sigs = 0;
sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
restore_flags(flags);
return(sigs);
}
/*****************************************************************************/
/*
* Enable/Disable the Transmitter and/or Receiver.
*/
static void stl_enablerxtx(stlport_t *portp, int rx, int tx)
{
unsigned char ccr;
unsigned long flags;
#if DEBUG
printk("stl_enablerxtx(portp=%x,rx=%d,tx=%d)\n", (int) portp, rx, tx);
#endif
ccr = 0;
if (tx == 0)
ccr |= CCR_TXDISABLE;
else if (tx > 0)
ccr |= CCR_TXENABLE;
if (rx == 0)
ccr |= CCR_RXDISABLE;
else if (rx > 0)
ccr |= CCR_RXENABLE;
save_flags(flags);
cli();
BRDENABLE(portp->brdnr, portp->pagenr);
stl_setreg(portp, CAR, (portp->portnr & 0x03));
stl_ccrwait(portp);
stl_setreg(portp, CCR, ccr);
stl_ccrwait(portp);
BRDDISABLE(portp->brdnr);
restore_flags(flags);
}
/*****************************************************************************/
/*
* Start/stop the Transmitter and/or Receiver.
*/
static void stl_startrxtx(stlport_t *portp, int rx, int tx)
{
unsigned char sreron, sreroff;
unsigned long flags;
#if DEBUG
printk("stl_startrxtx(portp=%x,rx=%d,tx=%d)\n", (int) portp, rx, tx);
#endif
sreron = 0;
sreroff = 0;
if (tx == 0)
sreroff |= (SRER_TXDATA | SRER_TXEMPTY);
else if (tx == 1)
sreron |= SRER_TXDATA;
else if (tx >= 2)
sreron |= SRER_TXEMPTY;
if (rx == 0)
sreroff |= SRER_RXDATA;
else if (rx > 0)
sreron |= SRER_RXDATA;
save_flags(flags);
cli();
BRDENABLE(portp->brdnr, portp->pagenr);
stl_setreg(portp, CAR, (portp->portnr & 0x03));
stl_setreg(portp, SRER, ((stl_getreg(portp, SRER) & ~sreroff) | sreron));
BRDDISABLE(portp->brdnr);
if (tx > 0)
set_bit(ASYI_TXBUSY, &portp->istate);
restore_flags(flags);
}
/*****************************************************************************/
/*
* Disable all interrupts from this port.
*/
static void stl_disableintrs(stlport_t *portp)
{
unsigned long flags;
#if DEBUG
printk("stl_disableintrs(portp=%x)\n", (int) portp);
#endif
save_flags(flags);
cli();
BRDENABLE(portp->brdnr, portp->pagenr);
stl_setreg(portp, CAR, (portp->portnr & 0x03));
stl_setreg(portp, SRER, 0);
BRDDISABLE(portp->brdnr);
restore_flags(flags);
}
/*****************************************************************************/
static void stl_sendbreak(stlport_t *portp, long len)
{
unsigned long flags;
#if DEBUG
printk("stl_sendbreak(portp=%x,len=%d)\n", (int) portp, (int) len);
#endif
save_flags(flags);
cli();
BRDENABLE(portp->brdnr, portp->pagenr);
stl_setreg(portp, CAR, (portp->portnr & 0x03));
stl_setreg(portp, COR2, (stl_getreg(portp, COR2) | COR2_ETC));
stl_setreg(portp, SRER, ((stl_getreg(portp, SRER) & ~SRER_TXDATA) | SRER_TXEMPTY));
BRDDISABLE(portp->brdnr);
len = len / 5;
portp->brklen = (len > 255) ? 255 : len;
portp->stats.txbreaks++;
restore_flags(flags);
}
/*****************************************************************************/
/*
* Map in interrupt vector to this driver. Check that we don't
* already have this vector mapped, we might be sharing this
* interrupt across multiple boards.
*/
static int stl_mapirq(int irq)
{
int rc, i;
#if DEBUG
printk("stl_mapirq(irq=%d)\n", irq);
#endif
rc = 0;
for (i = 0; (i < stl_numintrs); i++) {
if (stl_gotintrs[i] == irq)
break;
}
if (i >= stl_numintrs) {
if (request_irq(irq, stl_intr, SA_INTERRUPT, stl_drvname, NULL) != 0) {
printk("STALLION: failed to register interrupt routine for irq=%d\n", irq);
rc = -ENODEV;
} else {
stl_gotintrs[stl_numintrs++] = irq;
}
}
return(rc);
}
/*****************************************************************************/
/*
* Try to find and initialize all the ports on a panel. We don't care
* what sort of board these ports are on - since the port io registers
* are almost identical when dealing with ports.
*/
static int stl_initports(stlbrd_t *brdp, stlpanel_t *panelp)
{
stlport_t *portp;
unsigned int chipmask;
unsigned int gfrcr;
int nrchips, uartaddr, ioaddr;
int i, j;
#if DEBUG
printk("stl_initports(panelp=%x)\n", (int) panelp);
#endif
BRDENABLE(panelp->brdnr, panelp->pagenr);
/*
* Check that each chip is present and started up OK.
*/
chipmask = 0;
nrchips = panelp->nrports / CD1400_PORTS;
for (i = 0; (i < nrchips); i++) {
if (brdp->brdtype == BRD_ECHPCI) {
outb((panelp->pagenr + (i >> 1)), brdp->ioctrl);
ioaddr = panelp->iobase;
} else {
ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1));
}
uartaddr = (i & 0x01) ? 0x080 : 0;
outb((GFRCR + uartaddr), ioaddr);
outb(0, (ioaddr + EREG_DATA));
outb((CCR + uartaddr), ioaddr);
outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
outb((GFRCR + uartaddr), ioaddr);
for (j = 0; (j < CCR_MAXWAIT); j++) {
if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0)
break;
}
if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) {
printk("STALLION: cd1400 not responding, brd=%d panel=%d chip=%d\n", panelp->brdnr, panelp->panelnr, i);
continue;
}
chipmask |= (0x1 << i);
outb((PPR + uartaddr), ioaddr);
outb(PPR_SCALAR, (ioaddr + EREG_DATA));
}
/*
* All cd1400's are initialized (if found!). Now go through and setup
* each ports data structures. Also init the LIVR register of cd1400
* for each port.
*/
ioaddr = panelp->iobase;
for (i = 0; (i < panelp->nrports); i++) {
if (brdp->brdtype == BRD_ECHPCI) {
outb((panelp->pagenr + (i >> 3)), brdp->ioctrl);
ioaddr = panelp->iobase;
} else {
ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 3));
}
if ((chipmask & (0x1 << (i / 4))) == 0)
continue;
portp = (stlport_t *) stl_memalloc(sizeof(stlport_t));
if (portp == (stlport_t *) NULL) {
printk("STALLION: failed to allocate memory (size=%d)\n", sizeof(stlport_t));
break;
}
memset(portp, 0, sizeof(stlport_t));
portp->magic = STL_PORTMAGIC;
portp->portnr = i;
portp->brdnr = panelp->brdnr;
portp->panelnr = panelp->panelnr;
portp->ioaddr = ioaddr;
portp->uartaddr = (i & 0x04) << 5;
portp->pagenr = panelp->pagenr + (i >> 3);
portp->clk = brdp->clk;
portp->baud_base = STL_BAUDBASE;
portp->close_delay = STL_CLOSEDELAY;
portp->closing_wait = 30 * HZ;
portp->normaltermios = stl_deftermios;
portp->callouttermios = stl_deftermios;
portp->tqueue.routine = stl_offintr;
portp->tqueue.data = portp;
portp->stats.brd = portp->brdnr;
portp->stats.panel = portp->panelnr;
portp->stats.port = portp->portnr;
stl_setreg(portp, CAR, (i & 0x03));
stl_setreg(portp, LIVR, (i << 3));
portp->hwid = stl_getreg(portp, GFRCR);
panelp->ports[i] = portp;
}
BRDDISABLE(panelp->brdnr);
return(0);
}
/*****************************************************************************/
/*
* Try to find and initialize an EasyIO board.
*/
static int stl_initeio(stlbrd_t *brdp)
{
stlpanel_t *panelp;
unsigned int status;
int rc;
#if DEBUG
printk("stl_initeio(brdp=%x)\n", (int) brdp);
#endif
brdp->ioctrl = brdp->ioaddr1 + 1;
brdp->iostatus = brdp->ioaddr1 + 2;
brdp->clk = EIO_CLK;
status = inb(brdp->iostatus);
switch (status & EIO_IDBITMASK) {
case EIO_8PORTM:
brdp->clk = EIO_CLK8M;
/* fall thru */
case EIO_8PORTRS:
case EIO_8PORTDI:
brdp->nrports = 8;
break;
case EIO_4PORTRS:
brdp->nrports = 4;
break;
default:
return(-ENODEV);
}
request_region(brdp->ioaddr1, 8, "serial(EIO)");
/*
* Check that the supplied IRQ is good and then use it to setup the
* programmable interrupt bits on EIO board. Also set the edge/level
* triggered interrupt bit.
*/
if ((brdp->irq < 0) || (brdp->irq > 15) ||
(stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
printk("STALLION: invalid irq=%d for brd=%d\n", brdp->irq, brdp->brdnr);
return(-EINVAL);
}
outb((stl_vecmap[brdp->irq] | ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)), brdp->ioctrl);
panelp = (stlpanel_t *) stl_memalloc(sizeof(stlpanel_t));
if (panelp == (stlpanel_t *) NULL) {
printk("STALLION: failed to allocate memory (size=%d)\n", sizeof(stlpanel_t));
return(-ENOMEM);
}
memset(panelp, 0, sizeof(stlpanel_t));
panelp->magic = STL_PANELMAGIC;
panelp->brdnr = brdp->brdnr;
panelp->panelnr = 0;
panelp->nrports = brdp->nrports;
panelp->iobase = brdp->ioaddr1;
panelp->hwid = status;
brdp->panels[0] = panelp;
brdp->nrpanels = 1;
brdp->state |= BRD_FOUND;
brdp->hwid = status;
rc = stl_mapirq(brdp->irq);
return(rc);
}
/*****************************************************************************/
/*
* Try to find an ECH board and initialize it. This code is capable of
* dealing with all types of ECH board.
*/
static int stl_initech(stlbrd_t *brdp)
{
stlpanel_t *panelp;
unsigned int status, nxtid;
int panelnr, ioaddr, i;
#if DEBUG
printk("stl_initech(brdp=%x)\n", (int) brdp);
#endif
status = 0;
/*
* Set up the initial board register contents for boards. This varies a
* bit between the different board types. So we need to handle each
* separately. Also do a check that the supplied IRQ is good.
*/
if (brdp->brdtype == BRD_ECH) {
brdp->ioctrl = brdp->ioaddr1 + 1;
brdp->iostatus = brdp->ioaddr1 + 1;
status = inb(brdp->iostatus);
if ((status & ECH_IDBITMASK) != ECH_ID)
return(-ENODEV);
if ((brdp->irq < 0) || (brdp->irq > 15) ||
(stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
printk("STALLION: invalid irq=%d for brd=%d\n", brdp->irq, brdp->brdnr);
return(-EINVAL);
}
status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1);
status |= (stl_vecmap[brdp->irq] << 1);
outb((status | ECH_BRDRESET), brdp->ioaddr1);
brdp->ioctrlval = ECH_INTENABLE | ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE);
outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
outb(status, brdp->ioaddr1);
request_region(brdp->ioaddr1, 2, "serial(EC8/32)");
request_region(brdp->ioaddr2, 32, "serial(EC8/32-secondary)");
} else if (brdp->brdtype == BRD_ECHMC) {
brdp->ioctrl = brdp->ioaddr1 + 0x20;
brdp->iostatus = brdp->ioctrl;
status = inb(brdp->iostatus);
if ((status & ECH_IDBITMASK) != ECH_ID)
return(-ENODEV);
if ((brdp->irq < 0) || (brdp->irq > 15) ||
(stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
printk("STALLION: invalid irq=%d for brd=%d\n", brdp->irq, brdp->brdnr);
return(-EINVAL);
}
outb(ECHMC_BRDRESET, brdp->ioctrl);
outb(ECHMC_INTENABLE, brdp->ioctrl);
request_region(brdp->ioaddr1, 64, "serial(EC8/32-MC)");
} else if (brdp->brdtype == BRD_ECHPCI) {
brdp->ioctrl = brdp->ioaddr1 + 2;
request_region(brdp->ioaddr1, 4, "serial(EC8/32-PCI)");
request_region(brdp->ioaddr2, 8, "serial(EC8/32-PCI-secondary)");
}
brdp->clk = ECH_CLK;
brdp->hwid = status;
/*
* Scan through the secondary io address space looking for panels.
* As we find'em allocate and initialize panel structures for each.
*/
ioaddr = brdp->ioaddr2;
panelnr = 0;
nxtid = 0;
for (i = 0; (i < STL_MAXPANELS); i++) {
if (brdp->brdtype == BRD_ECHPCI) {
outb(nxtid, brdp->ioctrl);
ioaddr = brdp->ioaddr2;
}
status = inb(ioaddr + ECH_PNLSTATUS);
if ((status & ECH_PNLIDMASK) != nxtid)
break;
panelp = (stlpanel_t *) stl_memalloc(sizeof(stlpanel_t));
if (panelp == (stlpanel_t *) NULL) {
printk("STALLION: failed to allocate memory (size=%d)\n", sizeof(stlpanel_t));
break;
}
memset(panelp, 0, sizeof(stlpanel_t));
panelp->magic = STL_PANELMAGIC;
panelp->brdnr = brdp->brdnr;
panelp->panelnr = panelnr;
panelp->iobase = ioaddr;
panelp->pagenr = nxtid;
panelp->hwid = status;
if (status & ECH_PNL16PORT) {
if ((brdp->nrports + 16) > 32)
break;
panelp->nrports = 16;
panelp->ackmask = 0x80;
brdp->nrports += 16;
ioaddr += (EREG_BANKSIZE * 2);
nxtid += 2;
} else {
panelp->nrports = 8;
panelp->ackmask = 0xc0;
brdp->nrports += 8;
ioaddr += EREG_BANKSIZE;
nxtid++;
}
brdp->panels[panelnr++] = panelp;
brdp->nrpanels++;
if (ioaddr >= (brdp->ioaddr2 + 0x20))
break;
}
if (brdp->brdtype == BRD_ECH)
outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
brdp->state |= BRD_FOUND;
i = stl_mapirq(brdp->irq);
return(i);
}
/*****************************************************************************/
/*
* Initialize and configure the specified board.
* Scan through all the boards in the configuration and see what we
* can find. Handle EIO and the ECH boards a little differently here
* since the initial search and setup is too different.
*/
static int stl_brdinit(stlbrd_t *brdp)
{
int i;
#if DEBUG
printk("stl_brdinit(brdp=%x)\n", (int) brdp);
#endif
switch (brdp->brdtype) {
case BRD_EASYIO:
stl_initeio(brdp);
break;
case BRD_ECH:
case BRD_ECHMC:
case BRD_ECHPCI:
stl_initech(brdp);
break;
default:
printk("STALLION: unit=%d is unknown board type=%d\n", brdp->brdnr, brdp->brdtype);
return(ENODEV);
}
stl_brds[brdp->brdnr] = brdp;
if ((brdp->state & BRD_FOUND) == 0) {
printk("STALLION: %s board not found, unit=%d io=%x irq=%d\n", stl_brdnames[brdp->brdtype], brdp->brdnr, brdp->ioaddr1, brdp->irq);
return(ENODEV);
}
for (i = 0; (i < STL_MAXPANELS); i++)
if (brdp->panels[i] != (stlpanel_t *) NULL)
stl_initports(brdp, brdp->panels[i]);
printk("STALLION: %s found, unit=%d io=%x irq=%d nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype], brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels, brdp->nrports);
return(0);
}
/*****************************************************************************/
/*
* Find any ECH-PCI boards that might be installed. Initialize each
* one as it is found.
*/
#ifdef CONFIG_PCI
static int stl_findpcibrds()
{
stlbrd_t *brdp;
unsigned char busnr, devnr, irq;
unsigned short class;
unsigned int ioaddr;
int i, rc;
#if DEBUG
printk("stl_findpcibrds()\n");
#endif
if (pcibios_present()) {
for (i = 0; (i < STL_MAXBRDS); i++) {
if (pcibios_find_device(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410, i, &busnr, &devnr))
break;
/*
* Found a device on the PCI bus that has our vendor and
* device ID. Need to check now that it is really us.
*/
if ((rc = pcibios_read_config_word(busnr, devnr, PCI_CLASS_DEVICE, &class))) {
printk("STALLION: failed to read class type from PCI board, errno=%x\n", rc);
continue;
}
if (class == PCI_CLASS_STORAGE_IDE)
continue;
if (stl_nrbrds >= STL_MAXBRDS) {
printk("STALLION: too many boards found, maximum supported %d\n", STL_MAXBRDS);
break;
}
/*
* We have a Stallion board. Allocate a board structure
* and initialize it. Read its IO and IRQ resources
* from conf space.
*/
brdp = (stlbrd_t *) stl_memalloc(sizeof(stlbrd_t));
if (brdp == (stlbrd_t *) NULL) {
printk("STALLION: failed to allocate memory (size=%d)\n", sizeof(stlbrd_t));
return(-ENOMEM);
}
memset(brdp, 0, sizeof(stlbrd_t));
brdp->magic = STL_BOARDMAGIC;
brdp->brdnr = stl_nrbrds++;
brdp->brdtype = BRD_ECHPCI;
if ((rc = pcibios_read_config_dword(busnr, devnr, PCI_BASE_ADDRESS_0, &ioaddr))) {
printk("STALLION: failed to read BAR register from PCI board, errno=%x\n", rc);
continue;
}
brdp->ioaddr2 = (ioaddr & PCI_BASE_ADDRESS_IO_MASK);
if ((rc = pcibios_read_config_dword(busnr, devnr, PCI_BASE_ADDRESS_1, &ioaddr))) {
printk("STALLION: failed to read BAR register from PCI board, errno=%x\n", rc);
continue;
}
brdp->ioaddr1 = (ioaddr & PCI_BASE_ADDRESS_IO_MASK);
#if DEBUG
printk("%s(%d): BAR0=%x BAR1=%x\n", __FILE__, __LINE__, brdp->ioaddr2, brdp->ioaddr1);
#endif
if ((rc = pcibios_read_config_byte(busnr, devnr, PCI_INTERRUPT_LINE, &irq))) {
printk("STALLION: failed to read BAR register from PCI board, errno=%x\n", rc);
continue;
}
brdp->irq = irq;
stl_brdinit(brdp);
}
}
return(0);
}
#endif
/*****************************************************************************/
/*
* Scan through all the boards in the configuration and see what we
* can find. Handle EIO and the ECH boards a little differently here
* since the initial search and setup is too different.
*/
static int stl_initbrds()
{
stlbrd_t *brdp;
stlconf_t *confp;
int i;
#if DEBUG
printk("stl_initbrds()\n");
#endif
if (stl_nrbrds > STL_MAXBRDS) {
printk("STALLION: too many boards in configuration table, truncating to %d\n", STL_MAXBRDS);
stl_nrbrds = STL_MAXBRDS;
}
/*
* Firstly scan the list of static boards configured. Allocate
* resources and initialize the boards as found.
*/
for (i = 0; (i < stl_nrbrds); i++) {
confp = &stl_brdconf[i];
brdp = (stlbrd_t *) stl_memalloc(sizeof(stlbrd_t));
if (brdp == (stlbrd_t *) NULL) {
printk("STALLION: failed to allocate memory (size=%d)\n", sizeof(stlbrd_t));
return(-ENOMEM);
}
memset(brdp, 0, sizeof(stlbrd_t));
brdp->magic = STL_BOARDMAGIC;
brdp->brdnr = i;
brdp->brdtype = confp->brdtype;
brdp->ioaddr1 = confp->ioaddr1;
brdp->ioaddr2 = confp->ioaddr2;
brdp->irq = confp->irq;
brdp->irqtype = confp->irqtype;
stl_brdinit(brdp);
}
#ifdef CONFIG_PCI
/*
* If the PCI BIOS support is compiled in then let's go looking for
* ECH-PCI boards.
*/
stl_findpcibrds();
#endif
return(0);
}
/*****************************************************************************/
/*
* Return the board stats structure to user app.
*/
static int stl_getbrdstats(combrd_t *bp)
{
stlbrd_t *brdp;
stlpanel_t *panelp;
int i;
memcpy_fromfs(&stl_brdstats, bp, sizeof(combrd_t));
if (stl_brdstats.brd >= STL_MAXBRDS)
return(-ENODEV);
brdp = stl_brds[stl_brdstats.brd];
if (brdp == (stlbrd_t *) NULL)
return(-ENODEV);
memset(&stl_brdstats, 0, sizeof(combrd_t));
stl_brdstats.brd = brdp->brdnr;
stl_brdstats.type = brdp->brdtype;
stl_brdstats.hwid = brdp->hwid;
stl_brdstats.state = brdp->state;
stl_brdstats.ioaddr = brdp->ioaddr1;
stl_brdstats.ioaddr2 = brdp->ioaddr2;
stl_brdstats.irq = brdp->irq;
stl_brdstats.nrpanels = brdp->nrpanels;
stl_brdstats.nrports = brdp->nrports;
for (i = 0; (i < brdp->nrpanels); i++) {
panelp = brdp->panels[i];
stl_brdstats.panels[i].panel = i;
stl_brdstats.panels[i].hwid = panelp->hwid;
stl_brdstats.panels[i].nrports = panelp->nrports;
}
memcpy_tofs(bp, &stl_brdstats, sizeof(combrd_t));
return(0);
}
/*****************************************************************************/
/*
* Resolve the referenced port number into a port struct pointer.
*/
static stlport_t *stl_getport(int brdnr, int panelnr, int portnr)
{
stlbrd_t *brdp;
stlpanel_t *panelp;
if ((brdnr < 0) || (brdnr >= STL_MAXBRDS))
return((stlport_t *) NULL);
brdp = stl_brds[brdnr];
if (brdp == (stlbrd_t *) NULL)
return((stlport_t *) NULL);
if ((panelnr < 0) || (panelnr >= brdp->nrpanels))
return((stlport_t *) NULL);
panelp = brdp->panels[panelnr];
if (panelp == (stlpanel_t *) NULL)
return((stlport_t *) NULL);
if ((portnr < 0) || (portnr >= panelp->nrports))
return((stlport_t *) NULL);
return(panelp->ports[portnr]);
}
/*****************************************************************************/
/*
* Return the port stats structure to user app. A NULL port struct
* pointer passed in means that we need to find out from the app
* what port to get stats for (used through board control device).
*/
static int stl_getportstats(stlport_t *portp, comstats_t *cp)
{
unsigned char *head, *tail;
unsigned long flags;
if (portp == (stlport_t *) NULL) {
memcpy_fromfs(&stl_comstats, cp, sizeof(comstats_t));
portp = stl_getport(stl_comstats.brd, stl_comstats.panel, stl_comstats.port);
if (portp == (stlport_t *) NULL)
return(-ENODEV);
}
portp->stats.state = portp->istate;
portp->stats.flags = portp->flags;
portp->stats.hwid = portp->hwid;
portp->stats.ttystate = 0;
portp->stats.cflags = 0;
portp->stats.iflags = 0;
portp->stats.oflags = 0;
portp->stats.lflags = 0;
portp->stats.rxbuffered = 0;
save_flags(flags);
cli();
if (portp->tty != (struct tty_struct *) NULL) {
if (portp->tty->driver_data == portp) {
portp->stats.ttystate = portp->tty->flags;
portp->stats.rxbuffered = portp->tty->flip.count;
if (portp->tty->termios != (struct termios *) NULL) {
portp->stats.cflags = portp->tty->termios->c_cflag;
portp->stats.iflags = portp->tty->termios->c_iflag;
portp->stats.oflags = portp->tty->termios->c_oflag;
portp->stats.lflags = portp->tty->termios->c_lflag;
}
}
}
restore_flags(flags);
head = portp->tx.head;
tail = portp->tx.tail;
portp->stats.txbuffered = ((head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)));
portp->stats.signals = (unsigned long) stl_getsignals(portp);
memcpy_tofs(cp, &portp->stats, sizeof(comstats_t));
return(0);
}
/*****************************************************************************/
/*
* Clear the port stats structure. We also return it zeroed out...
*/
static int stl_clrportstats(stlport_t *portp, comstats_t *cp)
{
if (portp == (stlport_t *) NULL) {
memcpy_fromfs(&stl_comstats, cp, sizeof(comstats_t));
portp = stl_getport(stl_comstats.brd, stl_comstats.panel, stl_comstats.port);
if (portp == (stlport_t *) NULL)
return(-ENODEV);
}
memset(&portp->stats, 0, sizeof(comstats_t));
portp->stats.brd = portp->brdnr;
portp->stats.panel = portp->panelnr;
portp->stats.port = portp->portnr;
memcpy_tofs(cp, &portp->stats, sizeof(comstats_t));
return(0);
}
/*****************************************************************************/
/*
* Return the entire driver ports structure to a user app.
*/
static int stl_getportstruct(unsigned long arg)
{
stlport_t *portp;
memcpy_fromfs(&stl_dummyport, (void *) arg, sizeof(stlport_t));
portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr,
stl_dummyport.portnr);
if (portp == (stlport_t *) NULL)
return(-ENODEV);
memcpy_tofs((void *) arg, portp, sizeof(stlport_t));
return(0);
}
/*****************************************************************************/
/*
* Return the entire driver board structure to a user app.
*/
static int stl_getbrdstruct(unsigned long arg)
{
stlbrd_t *brdp;
memcpy_fromfs(&stl_dummybrd, (void *) arg, sizeof(stlbrd_t));
if ((stl_dummybrd.brdnr < 0) || (stl_dummybrd.brdnr >= STL_MAXBRDS))
return(-ENODEV);
brdp = stl_brds[stl_dummybrd.brdnr];
if (brdp == (stlbrd_t *) NULL)
return(-ENODEV);
memcpy_tofs((void *) arg, brdp, sizeof(stlbrd_t));
return(0);
}
/*****************************************************************************/
/*
* The "staliomem" device is also required to do some special operations
* on the board and/or ports. In this driver it is mostly used for stats
* collection.
*/
static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
{
int brdnr, rc;
#if DEBUG
printk("stl_memioctl(ip=%x,fp=%x,cmd=%x,arg=%x)\n", (int) ip, (int) fp, cmd, (int) arg);
#endif
brdnr = MINOR(ip->i_rdev);
if (brdnr >= STL_MAXBRDS)
return(-ENODEV);
rc = 0;
switch (cmd) {
case COM_GETPORTSTATS:
if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(comstats_t))) == 0)
rc = stl_getportstats((stlport_t *) NULL, (comstats_t *) arg);
break;
case COM_CLRPORTSTATS:
if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(comstats_t))) == 0)
rc = stl_clrportstats((stlport_t *) NULL, (comstats_t *) arg);
break;
case COM_GETBRDSTATS:
if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(combrd_t))) == 0)
rc = stl_getbrdstats((combrd_t *) arg);
break;
case COM_READPORT:
if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(stlport_t))) == 0)
rc = stl_getportstruct(arg);
break;
case COM_READBOARD:
if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(stlbrd_t))) == 0)
rc = stl_getbrdstruct(arg);
break;
default:
rc = -ENOIOCTLCMD;
break;
}
return(rc);
}
/*****************************************************************************/
int stl_init(void)
{
printk(KERN_INFO "%s: version %s\n", stl_drvname, stl_drvversion);
stl_initbrds();
/*
* Allocate a temporary write buffer.
*/
stl_tmpwritebuf = (char *) stl_memalloc(STL_TXBUFSIZE);
if (stl_tmpwritebuf == (char *) NULL)
printk("STALLION: failed to allocate memory (size=%d)\n", STL_TXBUFSIZE);
/*
* Set up a character driver for per board stuff. This is mainly used
* to do stats ioctls on the ports.
*/
if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
printk("STALLION: failed to register serial board device\n");
/*
* Set up the tty driver structure and register us as a driver.
* Also setup the callout tty device.
*/
memset(&stl_serial, 0, sizeof(struct tty_driver));
stl_serial.magic = TTY_DRIVER_MAGIC;
stl_serial.name = stl_serialname;
stl_serial.major = STL_SERIALMAJOR;
stl_serial.minor_start = 0;
stl_serial.num = STL_MAXBRDS * STL_MAXPORTS;
stl_serial.type = TTY_DRIVER_TYPE_SERIAL;
stl_serial.subtype = STL_DRVTYPSERIAL;
stl_serial.init_termios = stl_deftermios;
stl_serial.flags = TTY_DRIVER_REAL_RAW;
stl_serial.refcount = &stl_refcount;
stl_serial.table = stl_ttys;
stl_serial.termios = stl_termios;
stl_serial.termios_locked = stl_termioslocked;
stl_serial.open = stl_open;
stl_serial.close = stl_close;
stl_serial.write = stl_write;
stl_serial.put_char = stl_putchar;
stl_serial.flush_chars = stl_flushchars;
stl_serial.write_room = stl_writeroom;
stl_serial.chars_in_buffer = stl_charsinbuffer;
stl_serial.ioctl = stl_ioctl;
stl_serial.set_termios = stl_settermios;
stl_serial.throttle = stl_throttle;
stl_serial.unthrottle = stl_unthrottle;
stl_serial.stop = stl_stop;
stl_serial.start = stl_start;
stl_serial.hangup = stl_hangup;
stl_serial.flush_buffer = stl_flushbuffer;
stl_callout = stl_serial;
stl_callout.name = stl_calloutname;
stl_callout.major = STL_CALLOUTMAJOR;
stl_callout.subtype = STL_DRVTYPCALLOUT;
if (tty_register_driver(&stl_serial))
printk("STALLION: failed to register serial driver\n");
if (tty_register_driver(&stl_callout))
printk("STALLION: failed to register callout driver\n");
return(0);
}
/*****************************************************************************/
