patch-2.4.0-test8 linux/drivers/media/video/stallion.c
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- Lines: 5330
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.4.0-test7/linux/drivers/media/video/stallion.c
- Orig date:
Wed Aug 23 18:36:37 2000
diff -u --recursive --new-file v2.4.0-test7/linux/drivers/media/video/stallion.c linux/drivers/media/video/stallion.c
@@ -1,5329 +0,0 @@
-/*****************************************************************************/
-
-/*
- * stallion.c -- stallion multiport serial driver.
- *
- * Copyright (C) 1996-1999 Stallion Technologies (support@stallion.oz.au).
- * Copyright (C) 1994-1996 Greg Ungerer.
- *
- * 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/config.h>
-#include <linux/module.h>
-#include <linux/version.h> /* for linux/stallion.h */
-#include <linux/malloc.h>
-#include <linux/interrupt.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/cd1400.h>
-#include <linux/sc26198.h>
-#include <linux/comstats.h>
-#include <linux/stallion.h>
-#include <linux/ioport.h>
-#include <linux/init.h>
-#include <linux/smp_lock.h>
-#include <linux/devfs_fs_kernel.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-
-#ifdef CONFIG_PCI
-#include <linux/pci.h>
-#endif
-
-/*****************************************************************************/
-
-/*
- * Define different board types. Use the standard Stallion "assigned"
- * board numbers. Boards supported in this driver 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 BRD_ECH64PCI 27
-#define BRD_EASYIOPCI 28
-
-/*
- * 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
-
-/*
- * Set the TX buffer size. Bigger is better, but we don't want
- * to chew too much memory with buffers!
- */
-#define STL_TXBUFLOW 512
-#define STL_TXBUFSIZE 4096
-
-/*****************************************************************************/
-
-/*
- * 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_drvtitle = "Stallion Multiport Serial Driver";
-static char *stl_drvname = "stallion";
-static char *stl_drvversion = "5.6.0";
-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 DECLARE_MUTEX(stl_tmpwritesem);
-
-/*
- * 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;
-
-/*
- * Define global place to put buffer overflow characters.
- */
-static char stl_unwanted[SC26198_RXFIFOSIZE];
-
-/*
- * 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!
- */
-#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 ASYI_TXFLOWED 4
-
-/*
- * 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",
- "EC8/64-PCI",
- "EasyIO-PCI",
-};
-
-/*****************************************************************************/
-
-#ifdef MODULE
-/*
- * Define some string labels for arguments passed from the module
- * load line. These allow for easy board definitions, and easy
- * modification of the io, memory and irq resoucres.
- */
-
-static char *board0[4];
-static char *board1[4];
-static char *board2[4];
-static char *board3[4];
-
-static char **stl_brdsp[] = {
- (char **) &board0,
- (char **) &board1,
- (char **) &board2,
- (char **) &board3
-};
-
-/*
- * Define a set of common board names, and types. This is used to
- * parse any module arguments.
- */
-
-typedef struct stlbrdtype {
- char *name;
- int type;
-} stlbrdtype_t;
-
-static stlbrdtype_t stl_brdstr[] = {
- { "easyio", BRD_EASYIO },
- { "eio", BRD_EASYIO },
- { "20", BRD_EASYIO },
- { "ec8/32", BRD_ECH },
- { "ec8/32-at", BRD_ECH },
- { "ec8/32-isa", BRD_ECH },
- { "ech", BRD_ECH },
- { "echat", BRD_ECH },
- { "21", BRD_ECH },
- { "ec8/32-mc", BRD_ECHMC },
- { "ec8/32-mca", BRD_ECHMC },
- { "echmc", BRD_ECHMC },
- { "echmca", BRD_ECHMC },
- { "22", BRD_ECHMC },
- { "ec8/32-pc", BRD_ECHPCI },
- { "ec8/32-pci", BRD_ECHPCI },
- { "26", BRD_ECHPCI },
- { "ec8/64-pc", BRD_ECH64PCI },
- { "ec8/64-pci", BRD_ECH64PCI },
- { "ech-pci", BRD_ECH64PCI },
- { "echpci", BRD_ECH64PCI },
- { "echpc", BRD_ECH64PCI },
- { "27", BRD_ECH64PCI },
- { "easyio-pc", BRD_EASYIOPCI },
- { "easyio-pci", BRD_EASYIOPCI },
- { "eio-pci", BRD_EASYIOPCI },
- { "eiopci", BRD_EASYIOPCI },
- { "28", BRD_EASYIOPCI },
-};
-
-/*
- * Define the module agruments.
- */
-MODULE_AUTHOR("Greg Ungerer");
-MODULE_DESCRIPTION("Stallion Multiport Serial Driver");
-
-MODULE_PARM(board0, "1-4s");
-MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]");
-MODULE_PARM(board1, "1-4s");
-MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]");
-MODULE_PARM(board2, "1-4s");
-MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]");
-MODULE_PARM(board3, "1-4s");
-MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]");
-
-#endif
-
-/*****************************************************************************/
-
-/*
- * Hardware ID bits for the EasyIO and ECH boards. These defines apply
- * to the directly accessible io ports of these boards (not the uarts -
- * they are in cd1400.h and sc26198.h).
- */
-#define EIO_8PORTRS 0x04
-#define EIO_4PORTRS 0x05
-#define EIO_8PORTDI 0x00
-#define EIO_8PORTM 0x06
-#define EIO_MK3 0x03
-#define EIO_IDBITMASK 0x07
-
-#define EIO_BRDMASK 0xf0
-#define ID_BRD4 0x10
-#define ID_BRD8 0x20
-#define ID_BRD16 0x30
-
-#define EIO_INTRPEND 0x08
-#define EIO_INTEDGE 0x00
-#define EIO_INTLEVEL 0x08
-#define EIO_0WS 0x10
-
-#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_PNLXPID 0x40
-#define ECH_PNLINTRPEND 0x80
-
-#define ECH_ADDR2MASK 0x1e0
-
-/*
- * 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 STL_CD1400MAXBAUD 230400
-#define STL_SC26198MAXBAUD 460800
-
-#define STL_BAUDBASE 115200
-#define STL_CLOSEDELAY (5 * HZ / 10)
-
-/*****************************************************************************/
-
-#ifdef CONFIG_PCI
-
-/*
- * Define the Stallion PCI vendor and device IDs.
- */
-#ifndef PCI_VENDOR_ID_STALLION
-#define PCI_VENDOR_ID_STALLION 0x124d
-#endif
-#ifndef PCI_DEVICE_ID_ECHPCI832
-#define PCI_DEVICE_ID_ECHPCI832 0x0000
-#endif
-#ifndef PCI_DEVICE_ID_ECHPCI864
-#define PCI_DEVICE_ID_ECHPCI864 0x0002
-#endif
-#ifndef PCI_DEVICE_ID_EIOPCI
-#define PCI_DEVICE_ID_EIOPCI 0x0003
-#endif
-
-/*
- * Define structure to hold all Stallion PCI boards.
- */
-typedef struct stlpcibrd {
- unsigned short vendid;
- unsigned short devid;
- int brdtype;
-} stlpcibrd_t;
-
-static stlpcibrd_t stl_pcibrds[] = {
- { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864, BRD_ECH64PCI },
- { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI, BRD_EASYIOPCI },
- { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832, BRD_ECHPCI },
- { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410, BRD_ECHPCI },
-};
-
-static int stl_nrpcibrds = sizeof(stl_pcibrds) / sizeof(stlpcibrd_t);
-
-#endif
-
-/*****************************************************************************/
-
-/*
- * Define macros to extract a brd/port number from a minor number.
- */
-#define MINOR2BRD(min) (((min) & 0xc0) >> 6)
-#define MINOR2PORT(min) ((min) & 0x3f)
-
-/*
- * Define a baud rate table that converts termios baud rate selector
- * into the actual baud rate value. All baud rate calculations 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, 460800, 921600
-};
-
-/*
- * Define some handy local macros...
- */
-#undef MIN
-#define MIN(a,b) (((a) <= (b)) ? (a) : (b))
-
-#undef TOLOWER
-#define TOLOWER(x) ((((x) >= 'A') && ((x) <= 'Z')) ? ((x) + 0x20) : (x))
-
-/*****************************************************************************/
-
-/*
- * Declare all those functions in this driver!
- */
-
-#ifdef MODULE
-int init_module(void);
-void cleanup_module(void);
-static void stl_argbrds(void);
-static int stl_parsebrd(stlconf_t *confp, char **argp);
-
-static unsigned long stl_atol(char *str);
-#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_breakctl(struct tty_struct *tty, int state);
-static void stl_waituntilsent(struct tty_struct *tty, int timeout);
-static void stl_sendxchar(struct tty_struct *tty, char ch);
-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_portinfo(stlport_t *portp, int portnr, char *pos);
-static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data);
-
-static int stl_brdinit(stlbrd_t *brdp);
-static int stl_initports(stlbrd_t *brdp, stlpanel_t *panelp);
-static int stl_mapirq(int irq, char *name);
-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 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_eiointr(stlbrd_t *brdp);
-static void stl_echatintr(stlbrd_t *brdp);
-static void stl_echmcaintr(stlbrd_t *brdp);
-static void stl_echpciintr(stlbrd_t *brdp);
-static void stl_echpci64intr(stlbrd_t *brdp);
-static void stl_offintr(void *private);
-static void *stl_memalloc(int len);
-static stlbrd_t *stl_allocbrd(void);
-static stlport_t *stl_getport(int brdnr, int panelnr, int portnr);
-
-static inline int stl_initbrds(void);
-static inline int stl_initeio(stlbrd_t *brdp);
-static inline int stl_initech(stlbrd_t *brdp);
-static inline int stl_getbrdnr(void);
-
-#ifdef CONFIG_PCI
-static inline int stl_findpcibrds(void);
-static inline int stl_initpcibrd(int brdtype, struct pci_dev *devp);
-#endif
-
-/*
- * CD1400 uart specific handling functions.
- */
-static void stl_cd1400setreg(stlport_t *portp, int regnr, int value);
-static int stl_cd1400getreg(stlport_t *portp, int regnr);
-static int stl_cd1400updatereg(stlport_t *portp, int regnr, int value);
-static int stl_cd1400panelinit(stlbrd_t *brdp, stlpanel_t *panelp);
-static void stl_cd1400portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp);
-static void stl_cd1400setport(stlport_t *portp, struct termios *tiosp);
-static int stl_cd1400getsignals(stlport_t *portp);
-static void stl_cd1400setsignals(stlport_t *portp, int dtr, int rts);
-static void stl_cd1400ccrwait(stlport_t *portp);
-static void stl_cd1400enablerxtx(stlport_t *portp, int rx, int tx);
-static void stl_cd1400startrxtx(stlport_t *portp, int rx, int tx);
-static void stl_cd1400disableintrs(stlport_t *portp);
-static void stl_cd1400sendbreak(stlport_t *portp, int len);
-static void stl_cd1400flowctrl(stlport_t *portp, int state);
-static void stl_cd1400sendflow(stlport_t *portp, int state);
-static void stl_cd1400flush(stlport_t *portp);
-static int stl_cd1400datastate(stlport_t *portp);
-static void stl_cd1400eiointr(stlpanel_t *panelp, unsigned int iobase);
-static void stl_cd1400echintr(stlpanel_t *panelp, unsigned int iobase);
-static void stl_cd1400txisr(stlpanel_t *panelp, int ioaddr);
-static void stl_cd1400rxisr(stlpanel_t *panelp, int ioaddr);
-static void stl_cd1400mdmisr(stlpanel_t *panelp, int ioaddr);
-
-static inline int stl_cd1400breakisr(stlport_t *portp, int ioaddr);
-
-/*
- * SC26198 uart specific handling functions.
- */
-static void stl_sc26198setreg(stlport_t *portp, int regnr, int value);
-static int stl_sc26198getreg(stlport_t *portp, int regnr);
-static int stl_sc26198updatereg(stlport_t *portp, int regnr, int value);
-static int stl_sc26198getglobreg(stlport_t *portp, int regnr);
-static int stl_sc26198panelinit(stlbrd_t *brdp, stlpanel_t *panelp);
-static void stl_sc26198portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp);
-static void stl_sc26198setport(stlport_t *portp, struct termios *tiosp);
-static int stl_sc26198getsignals(stlport_t *portp);
-static void stl_sc26198setsignals(stlport_t *portp, int dtr, int rts);
-static void stl_sc26198enablerxtx(stlport_t *portp, int rx, int tx);
-static void stl_sc26198startrxtx(stlport_t *portp, int rx, int tx);
-static void stl_sc26198disableintrs(stlport_t *portp);
-static void stl_sc26198sendbreak(stlport_t *portp, int len);
-static void stl_sc26198flowctrl(stlport_t *portp, int state);
-static void stl_sc26198sendflow(stlport_t *portp, int state);
-static void stl_sc26198flush(stlport_t *portp);
-static int stl_sc26198datastate(stlport_t *portp);
-static void stl_sc26198wait(stlport_t *portp);
-static void stl_sc26198txunflow(stlport_t *portp, struct tty_struct *tty);
-static void stl_sc26198intr(stlpanel_t *panelp, unsigned int iobase);
-static void stl_sc26198txisr(stlport_t *port);
-static void stl_sc26198rxisr(stlport_t *port, unsigned int iack);
-static void stl_sc26198rxbadch(stlport_t *portp, unsigned char status, char ch);
-static void stl_sc26198rxbadchars(stlport_t *portp);
-static void stl_sc26198otherisr(stlport_t *port, unsigned int iack);
-
-/*****************************************************************************/
-
-/*
- * Generic UART support structure.
- */
-typedef struct uart {
- int (*panelinit)(stlbrd_t *brdp, stlpanel_t *panelp);
- void (*portinit)(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp);
- void (*setport)(stlport_t *portp, struct termios *tiosp);
- int (*getsignals)(stlport_t *portp);
- void (*setsignals)(stlport_t *portp, int dtr, int rts);
- void (*enablerxtx)(stlport_t *portp, int rx, int tx);
- void (*startrxtx)(stlport_t *portp, int rx, int tx);
- void (*disableintrs)(stlport_t *portp);
- void (*sendbreak)(stlport_t *portp, int len);
- void (*flowctrl)(stlport_t *portp, int state);
- void (*sendflow)(stlport_t *portp, int state);
- void (*flush)(stlport_t *portp);
- int (*datastate)(stlport_t *portp);
- void (*intr)(stlpanel_t *panelp, unsigned int iobase);
-} uart_t;
-
-/*
- * Define some macros to make calling these functions nice and clean.
- */
-#define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit)
-#define stl_portinit (* ((uart_t *) portp->uartp)->portinit)
-#define stl_setport (* ((uart_t *) portp->uartp)->setport)
-#define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals)
-#define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals)
-#define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx)
-#define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx)
-#define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs)
-#define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak)
-#define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl)
-#define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow)
-#define stl_flush (* ((uart_t *) portp->uartp)->flush)
-#define stl_datastate (* ((uart_t *) portp->uartp)->datastate)
-
-/*****************************************************************************/
-
-/*
- * CD1400 UART specific data initialization.
- */
-static uart_t stl_cd1400uart = {
- stl_cd1400panelinit,
- stl_cd1400portinit,
- stl_cd1400setport,
- stl_cd1400getsignals,
- stl_cd1400setsignals,
- stl_cd1400enablerxtx,
- stl_cd1400startrxtx,
- stl_cd1400disableintrs,
- stl_cd1400sendbreak,
- stl_cd1400flowctrl,
- stl_cd1400sendflow,
- stl_cd1400flush,
- stl_cd1400datastate,
- stl_cd1400eiointr
-};
-
-/*
- * Define the offsets within the register bank of a cd1400 based panel.
- * These io address offsets are common to the EasyIO board as well.
- */
-#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 CD1400_CLK 25000000
-#define CD1400_CLK8M 20000000
-
-/*
- * 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
-};
-
-/*****************************************************************************/
-
-/*
- * SC26198 UART specific data initization.
- */
-static uart_t stl_sc26198uart = {
- stl_sc26198panelinit,
- stl_sc26198portinit,
- stl_sc26198setport,
- stl_sc26198getsignals,
- stl_sc26198setsignals,
- stl_sc26198enablerxtx,
- stl_sc26198startrxtx,
- stl_sc26198disableintrs,
- stl_sc26198sendbreak,
- stl_sc26198flowctrl,
- stl_sc26198sendflow,
- stl_sc26198flush,
- stl_sc26198datastate,
- stl_sc26198intr
-};
-
-/*
- * Define the offsets within the register bank of a sc26198 based panel.
- */
-#define XP_DATA 0
-#define XP_ADDR 1
-#define XP_MODID 2
-#define XP_STATUS 2
-#define XP_IACK 3
-
-#define XP_BANKSIZE 4
-
-/*
- * Define the sc26198 baud rate table. Offsets within the table
- * represent the actual baud rate selector of sc26198 registers.
- */
-static unsigned int sc26198_baudtable[] = {
- 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600,
- 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200,
- 230400, 460800, 921600
-};
-
-#define SC26198_NRBAUDS (sizeof(sc26198_baudtable) / sizeof(unsigned int))
-
-/*****************************************************************************/
-
-/*
- * 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 = {
- owner: THIS_MODULE,
- ioctl: stl_memioctl,
-};
-
-/*****************************************************************************/
-
-static devfs_handle_t devfs_handle = 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_drvtitle,
- 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;
- }
- devfs_unregister (devfs_handle);
- if ((i = devfs_unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
- printk("STALLION: failed to un-register serial memory device, "
- "errno=%d\n", -i);
-
- if (stl_tmpwritebuf != (char *) NULL)
- kfree(stl_tmpwritebuf);
-
- for (i = 0; (i < stl_nrbrds); i++) {
- if ((brdp = stl_brds[i]) == (stlbrd_t *) NULL)
- continue;
- for (j = 0; (j < STL_MAXPANELS); j++) {
- panelp = brdp->panels[j];
- if (panelp == (stlpanel_t *) NULL)
- continue;
- for (k = 0; (k < STL_PORTSPERPANEL); k++) {
- portp = panelp->ports[k];
- if (portp == (stlport_t *) NULL)
- continue;
- if (portp->tty != (struct tty_struct *) NULL)
- stl_hangup(portp->tty);
- if (portp->tx.buf != (char *) NULL)
- kfree(portp->tx.buf);
- kfree(portp);
- }
- kfree(panelp);
- }
-
- release_region(brdp->ioaddr1, brdp->iosize1);
- if (brdp->iosize2 > 0)
- release_region(brdp->ioaddr2, brdp->iosize2);
-
- kfree(brdp);
- stl_brds[i] = (stlbrd_t *) NULL;
- }
-
- for (i = 0; (i < stl_numintrs); i++)
- free_irq(stl_gotintrs[i], NULL);
-
- restore_flags(flags);
-}
-
-/*****************************************************************************/
-
-/*
- * Check for any arguments passed in on the module load command line.
- */
-
-static void stl_argbrds()
-{
- stlconf_t conf;
- stlbrd_t *brdp;
- int nrargs, i;
-
-#if DEBUG
- printk("stl_argbrds()\n");
-#endif
-
- nrargs = sizeof(stl_brdsp) / sizeof(char **);
-
- for (i = stl_nrbrds; (i < nrargs); i++) {
- memset(&conf, 0, sizeof(conf));
- if (stl_parsebrd(&conf, stl_brdsp[i]) == 0)
- continue;
- if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL)
- continue;
- stl_nrbrds = i + 1;
- brdp->brdnr = i;
- brdp->brdtype = conf.brdtype;
- brdp->ioaddr1 = conf.ioaddr1;
- brdp->ioaddr2 = conf.ioaddr2;
- brdp->irq = conf.irq;
- brdp->irqtype = conf.irqtype;
- stl_brdinit(brdp);
- }
-}
-
-/*****************************************************************************/
-
-/*
- * Convert an ascii string number into an unsigned long.
- */
-
-static unsigned long stl_atol(char *str)
-{
- unsigned long val;
- int base, c;
- char *sp;
-
- val = 0;
- sp = str;
- if ((*sp == '0') && (*(sp+1) == 'x')) {
- base = 16;
- sp += 2;
- } else if (*sp == '0') {
- base = 8;
- sp++;
- } else {
- base = 10;
- }
-
- for (; (*sp != 0); sp++) {
- c = (*sp > '9') ? (TOLOWER(*sp) - 'a' + 10) : (*sp - '0');
- if ((c < 0) || (c >= base)) {
- printk("STALLION: invalid argument %s\n", str);
- val = 0;
- break;
- }
- val = (val * base) + c;
- }
- return(val);
-}
-
-/*****************************************************************************/
-
-/*
- * Parse the supplied argument string, into the board conf struct.
- */
-
-static int stl_parsebrd(stlconf_t *confp, char **argp)
-{
- char *sp;
- int nrbrdnames, i;
-
-#if DEBUG
- printk("stl_parsebrd(confp=%x,argp=%x)\n", (int) confp, (int) argp);
-#endif
-
- if ((argp[0] == (char *) NULL) || (*argp[0] == 0))
- return(0);
-
- for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++)
- *sp = TOLOWER(*sp);
-
- nrbrdnames = sizeof(stl_brdstr) / sizeof(stlbrdtype_t);
- for (i = 0; (i < nrbrdnames); i++) {
- if (strcmp(stl_brdstr[i].name, argp[0]) == 0)
- break;
- }
- if (i >= nrbrdnames) {
- printk("STALLION: unknown board name, %s?\n", argp[0]);
- return(0);
- }
-
- confp->brdtype = stl_brdstr[i].type;
-
- i = 1;
- if ((argp[i] != (char *) NULL) && (*argp[i] != 0))
- confp->ioaddr1 = stl_atol(argp[i]);
- i++;
- if (confp->brdtype == BRD_ECH) {
- if ((argp[i] != (char *) NULL) && (*argp[i] != 0))
- confp->ioaddr2 = stl_atol(argp[i]);
- i++;
- }
- if ((argp[i] != (char *) NULL) && (*argp[i] != 0))
- confp->irq = stl_atol(argp[i]);
- return(1);
-}
-
-#endif
-
-/*****************************************************************************/
-
-/*
- * Local driver kernel memory allocation routine.
- */
-
-static void *stl_memalloc(int len)
-{
- return((void *) kmalloc(len, GFP_KERNEL));
-}
-
-/*****************************************************************************/
-
-/*
- * Allocate a new board structure. Fill out the basic info in it.
- */
-
-static stlbrd_t *stl_allocbrd()
-{
- stlbrd_t *brdp;
-
- 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((stlbrd_t *) NULL);
- }
-
- memset(brdp, 0, sizeof(stlbrd_t));
- brdp->magic = STL_BOARDMAGIC;
- return(brdp);
-}
-
-/*****************************************************************************/
-
-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 = MINOR2BRD(minordev);
- if (brdnr >= stl_nrbrds)
- return(-ENODEV);
- brdp = stl_brds[brdnr];
- if (brdp == (stlbrd_t *) NULL)
- return(-ENODEV);
- minordev = MINOR2PORT(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);
-
- MOD_INC_USE_COUNT;
-
-/*
- * 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 (! tty_hung_up_p(filp))
- 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 (signal_pending(current)) {
- 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)) {
- MOD_DEC_USE_COUNT;
- restore_flags(flags);
- return;
- }
- if ((tty->count == 1) && (portp->refcount != 1))
- portp->refcount = 1;
- if (portp->refcount-- > 1) {
- MOD_DEC_USE_COUNT;
- 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 is
- * very accurate for the cd1400, not quite so for the sc26198.
- * (The sc26198 has no "end-of-data" interrupt only empty FIFO)
- */
- tty->closing = 1;
- if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
- tty_wait_until_sent(tty, portp->closing_wait);
- stl_waituntilsent(tty, (HZ / 2));
-
- 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(portp->tx.buf);
- 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;
- 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);
- MOD_DEC_USE_COUNT;
- 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;
- schedule_timeout(len);
- current->state = TASK_RUNNING;
- }
-}
-
-/*****************************************************************************/
-
-/*
- * 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 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);
-
- down(&stl_tmpwritesem);
- copy_from_user(stl_tmpwritebuf, chbuf, count);
- 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);
-
- if (from_user)
- up(&stl_tmpwritesem);
-
- 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.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.hub6 = 0;
- if (portp->uartp == &stl_cd1400uart) {
- sio.type = PORT_CIRRUS;
- sio.xmit_fifo_size = CD1400_TXFIFOSIZE;
- } else {
- sio.type = PORT_UNKNOWN;
- sio.xmit_fifo_size = SC26198_TXFIFOSIZE;
- }
-
- brdp = stl_brds[portp->brdnr];
- if (brdp != (stlbrd_t *) NULL)
- sio.irq = brdp->irq;
-
- copy_to_user(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
-
- copy_from_user(&sio, sp, sizeof(struct serial_struct));
- if (!capable(CAP_SYS_ADMIN)) {
- 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 int ival;
- 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);
-
- if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
- (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) {
- if (tty->flags & (1 << TTY_IO_ERROR))
- return(-EIO);
- }
-
- rc = 0;
-
- switch (cmd) {
- case TIOCGSOFTCAR:
- rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
- (unsigned int *) arg);
- break;
- case TIOCSSOFTCAR:
- if ((rc = verify_area(VERIFY_READ, (void *) arg,
- sizeof(int))) == 0) {
- get_user(ival, (unsigned int *) arg);
- tty->termios->c_cflag =
- (tty->termios->c_cflag & ~CLOCAL) |
- (ival ? CLOCAL : 0);
- }
- break;
- case TIOCMGET:
- if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
- sizeof(unsigned int))) == 0) {
- ival = stl_getsignals(portp);
- put_user(ival, (unsigned int *) arg);
- }
- break;
- case TIOCMBIS:
- if ((rc = verify_area(VERIFY_READ, (void *) arg,
- sizeof(unsigned int))) == 0) {
- get_user(ival, (unsigned int *) arg);
- stl_setsignals(portp, ((ival & TIOCM_DTR) ? 1 : -1),
- ((ival & TIOCM_RTS) ? 1 : -1));
- }
- break;
- case TIOCMBIC:
- if ((rc = verify_area(VERIFY_READ, (void *) arg,
- sizeof(unsigned int))) == 0) {
- get_user(ival, (unsigned int *) arg);
- stl_setsignals(portp, ((ival & TIOCM_DTR) ? 0 : -1),
- ((ival & TIOCM_RTS) ? 0 : -1));
- }
- break;
- case TIOCMSET:
- if ((rc = verify_area(VERIFY_READ, (void *) arg,
- sizeof(unsigned int))) == 0) {
- get_user(ival, (unsigned int *) arg);
- stl_setsignals(portp, ((ival & TIOCM_DTR) ? 1 : 0),
- ((ival & 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;
-
-#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;
- stl_flowctrl(portp, 0);
-}
-
-/*****************************************************************************/
-
-/*
- * Unflow control the device sending us data...
- */
-
-static void stl_unthrottle(struct tty_struct *tty)
-{
- stlport_t *portp;
-
-#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;
- stl_flowctrl(portp, 1);
-}
-
-/*****************************************************************************/
-
-/*
- * 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(portp->tx.buf);
- portp->tx.buf = (char *) NULL;
- portp->tx.head = (char *) NULL;
- portp->tx.tail = (char *) 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;
-
-#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;
-
- stl_flush(portp);
- wake_up_interruptible(&tty->write_wait);
- if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
- tty->ldisc.write_wakeup)
- (tty->ldisc.write_wakeup)(tty);
-}
-
-/*****************************************************************************/
-
-static void stl_breakctl(struct tty_struct *tty, int state)
-{
- stlport_t *portp;
-
-#if DEBUG
- printk("stl_breakctl(tty=%x,state=%d)\n", (int) tty, state);
-#endif
-
- if (tty == (struct tty_struct *) NULL)
- return;
- portp = tty->driver_data;
- if (portp == (stlport_t *) NULL)
- return;
-
- stl_sendbreak(portp, ((state == -1) ? 1 : 2));
-}
-
-/*****************************************************************************/
-
-static void stl_waituntilsent(struct tty_struct *tty, int timeout)
-{
- stlport_t *portp;
- unsigned long tend;
-
-#if DEBUG
- printk("stl_waituntilsent(tty=%x,timeout=%d)\n", (int) tty, timeout);
-#endif
-
- if (tty == (struct tty_struct *) NULL)
- return;
- portp = tty->driver_data;
- if (portp == (stlport_t *) NULL)
- return;
-
- if (timeout == 0)
- timeout = HZ;
- tend = jiffies + timeout;
-
- while (stl_datastate(portp)) {
- if (signal_pending(current))
- break;
- stl_delay(2);
- if (time_after_eq(jiffies, tend))
- break;
- }
-}
-
-/*****************************************************************************/
-
-static void stl_sendxchar(struct tty_struct *tty, char ch)
-{
- stlport_t *portp;
-
-#if DEBUG
- printk("stl_sendxchar(tty=%x,ch=%x)\n", (int) tty, ch);
-#endif
-
- if (tty == (struct tty_struct *) NULL)
- return;
- portp = tty->driver_data;
- if (portp == (stlport_t *) NULL)
- return;
-
- if (ch == STOP_CHAR(tty))
- stl_sendflow(portp, 0);
- else if (ch == START_CHAR(tty))
- stl_sendflow(portp, 1);
- else
- stl_putchar(tty, ch);
-}
-
-/*****************************************************************************/
-
-#define MAXLINE 80
-
-/*
- * Format info for a specified port. The line is deliberately limited
- * to 80 characters. (If it is too long it will be truncated, if too
- * short then padded with spaces).
- */
-
-static int stl_portinfo(stlport_t *portp, int portnr, char *pos)
-{
- char *sp;
- int sigs, cnt;
-
- sp = pos;
- sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d",
- portnr, (portp->hwid == 1) ? "SC26198" : "CD1400",
- (int) portp->stats.txtotal, (int) portp->stats.rxtotal);
-
- if (portp->stats.rxframing)
- sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing);
- if (portp->stats.rxparity)
- sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity);
- if (portp->stats.rxbreaks)
- sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks);
- if (portp->stats.rxoverrun)
- sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun);
-
- sigs = stl_getsignals(portp);
- cnt = sprintf(sp, "%s%s%s%s%s ",
- (sigs & TIOCM_RTS) ? "|RTS" : "",
- (sigs & TIOCM_CTS) ? "|CTS" : "",
- (sigs & TIOCM_DTR) ? "|DTR" : "",
- (sigs & TIOCM_CD) ? "|DCD" : "",
- (sigs & TIOCM_DSR) ? "|DSR" : "");
- *sp = ' ';
- sp += cnt;
-
- for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++)
- *sp++ = ' ';
- if (cnt >= MAXLINE)
- pos[(MAXLINE - 2)] = '+';
- pos[(MAXLINE - 1)] = '\n';
-
- return(MAXLINE);
-}
-
-/*****************************************************************************/
-
-/*
- * Port info, read from the /proc file system.
- */
-
-static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data)
-{
- stlbrd_t *brdp;
- stlpanel_t *panelp;
- stlport_t *portp;
- int brdnr, panelnr, portnr, totalport;
- int curoff, maxoff;
- char *pos;
-
-#if DEBUG
- printk("stl_readproc(page=%x,start=%x,off=%x,count=%d,eof=%x,"
- "data=%x\n", (int) page, (int) start, (int) off, count,
- (int) eof, (int) data);
-#endif
-
- pos = page;
- totalport = 0;
- curoff = 0;
-
- if (off == 0) {
- pos += sprintf(pos, "%s: version %s", stl_drvtitle,
- stl_drvversion);
- while (pos < (page + MAXLINE - 1))
- *pos++ = ' ';
- *pos++ = '\n';
- }
- curoff = MAXLINE;
-
-/*
- * We scan through for each board, panel and port. The offset is
- * calculated on the fly, and irrelevant ports are skipped.
- */
- for (brdnr = 0; (brdnr < stl_nrbrds); brdnr++) {
- brdp = stl_brds[brdnr];
- if (brdp == (stlbrd_t *) NULL)
- continue;
- if (brdp->state == 0)
- continue;
-
- maxoff = curoff + (brdp->nrports * MAXLINE);
- if (off >= maxoff) {
- curoff = maxoff;
- continue;
- }
-
- totalport = brdnr * STL_MAXPORTS;
- for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) {
- panelp = brdp->panels[panelnr];
- if (panelp == (stlpanel_t *) NULL)
- continue;
-
- maxoff = curoff + (panelp->nrports * MAXLINE);
- if (off >= maxoff) {
- curoff = maxoff;
- totalport += panelp->nrports;
- continue;
- }
-
- for (portnr = 0; (portnr < panelp->nrports); portnr++,
- totalport++) {
- portp = panelp->ports[portnr];
- if (portp == (stlport_t *) NULL)
- continue;
- if (off >= (curoff += MAXLINE))
- continue;
- if ((pos - page + MAXLINE) > count)
- goto stl_readdone;
- pos += stl_portinfo(portp, totalport, pos);
- }
- }
- }
-
- *eof = 1;
-
-stl_readdone:
- *start = page;
- return(pos - page);
-}
-
-/*****************************************************************************/
-
-/*
- * All board interrupts are vectored through here first. This code then
- * calls off to the approrpriate board interrupt handlers.
- */
-
-static void stl_intr(int irq, void *dev_id, struct pt_regs *regs)
-{
- stlbrd_t *brdp;
- int i;
-
-#if DEBUG
- printk("stl_intr(irq=%d,regs=%x)\n", irq, (int) regs);
-#endif
-
- for (i = 0; (i < stl_nrbrds); i++) {
- if ((brdp = stl_brds[i]) == (stlbrd_t *) NULL)
- continue;
- if (brdp->state == 0)
- continue;
- (* brdp->isr)(brdp);
- }
-}
-
-/*****************************************************************************/
-
-/*
- * Interrupt service routine for EasyIO board types.
- */
-
-static void stl_eiointr(stlbrd_t *brdp)
-{
- stlpanel_t *panelp;
- unsigned int iobase;
-
- panelp = brdp->panels[0];
- iobase = panelp->iobase;
- while (inb(brdp->iostatus) & EIO_INTRPEND)
- (* panelp->isr)(panelp, iobase);
-}
-
-/*****************************************************************************/
-
-/*
- * Interrupt service routine for ECH-AT board types.
- */
-
-static void stl_echatintr(stlbrd_t *brdp)
-{
- stlpanel_t *panelp;
- unsigned int ioaddr;
- int bnknr;
-
- outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
-
- while (inb(brdp->iostatus) & ECH_INTRPEND) {
- for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
- ioaddr = brdp->bnkstataddr[bnknr];
- if (inb(ioaddr) & ECH_PNLINTRPEND) {
- panelp = brdp->bnk2panel[bnknr];
- (* panelp->isr)(panelp, (ioaddr & 0xfffc));
- }
- }
- }
-
- outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
-}
-
-/*****************************************************************************/
-
-/*
- * Interrupt service routine for ECH-MCA board types.
- */
-
-static void stl_echmcaintr(stlbrd_t *brdp)
-{
- stlpanel_t *panelp;
- unsigned int ioaddr;
- int bnknr;
-
- while (inb(brdp->iostatus) & ECH_INTRPEND) {
- for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
- ioaddr = brdp->bnkstataddr[bnknr];
- if (inb(ioaddr) & ECH_PNLINTRPEND) {
- panelp = brdp->bnk2panel[bnknr];
- (* panelp->isr)(panelp, (ioaddr & 0xfffc));
- }
- }
- }
-}
-
-/*****************************************************************************/
-
-/*
- * Interrupt service routine for ECH-PCI board types.
- */
-
-static void stl_echpciintr(stlbrd_t *brdp)
-{
- stlpanel_t *panelp;
- unsigned int ioaddr;
- int bnknr, recheck;
-
- while (1) {
- recheck = 0;
- for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
- outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl);
- ioaddr = brdp->bnkstataddr[bnknr];
- if (inb(ioaddr) & ECH_PNLINTRPEND) {
- panelp = brdp->bnk2panel[bnknr];
- (* panelp->isr)(panelp, (ioaddr & 0xfffc));
- recheck++;
- }
- }
- if (! recheck)
- break;
- }
-}
-
-/*****************************************************************************/
-
-/*
- * Interrupt service routine for ECH-8/64-PCI board types.
- */
-
-static void stl_echpci64intr(stlbrd_t *brdp)
-{
- stlpanel_t *panelp;
- unsigned int ioaddr;
- int bnknr;
-
- while (inb(brdp->ioctrl) & 0x1) {
- for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
- ioaddr = brdp->bnkstataddr[bnknr];
- if (inb(ioaddr) & ECH_PNLINTRPEND) {
- panelp = brdp->bnk2panel[bnknr];
- (* panelp->isr)(panelp, (ioaddr & 0xfffc));
- }
- }
- }
-}
-
-/*****************************************************************************/
-
-/*
- * 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;
-
- lock_kernel();
- 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);
- }
- }
- }
- }
- unlock_kernel();
-}
-
-/*****************************************************************************/
-
-/*
- * 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 __init stl_mapirq(int irq, char *name)
-{
- int rc, i;
-
-#if DEBUG
- printk("stl_mapirq(irq=%d,name=%s)\n", irq, name);
-#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_SHIRQ, name, NULL) != 0) {
- printk("STALLION: failed to register interrupt "
- "routine for %s irq=%d\n", name, irq);
- rc = -ENODEV;
- } else {
- stl_gotintrs[stl_numintrs++] = irq;
- }
- }
- return(rc);
-}
-
-/*****************************************************************************/
-
-/*
- * Initialize all the ports on a panel.
- */
-
-static int __init stl_initports(stlbrd_t *brdp, stlpanel_t *panelp)
-{
- stlport_t *portp;
- int chipmask, i;
-
-#if DEBUG
- printk("stl_initports(brdp=%x,panelp=%x)\n", (int) brdp, (int) panelp);
-#endif
-
- chipmask = stl_panelinit(brdp, panelp);
-
-/*
- * All UART's are initialized (if found!). Now go through and setup
- * each ports data structures.
- */
- for (i = 0; (i < panelp->nrports); i++) {
- 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->uartp = panelp->uartp;
- 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;
- init_waitqueue_head(&portp->open_wait);
- init_waitqueue_head(&portp->close_wait);
- portp->stats.brd = portp->brdnr;
- portp->stats.panel = portp->panelnr;
- portp->stats.port = portp->portnr;
- panelp->ports[i] = portp;
- stl_portinit(brdp, panelp, portp);
- }
-
- return(0);
-}
-
-/*****************************************************************************/
-
-/*
- * Try to find and initialize an EasyIO board.
- */
-
-static inline int stl_initeio(stlbrd_t *brdp)
-{
- stlpanel_t *panelp;
- unsigned int status;
- char *name;
- int rc;
-
-#if DEBUG
- printk("stl_initeio(brdp=%x)\n", (int) brdp);
-#endif
-
- brdp->ioctrl = brdp->ioaddr1 + 1;
- brdp->iostatus = brdp->ioaddr1 + 2;
-
- status = inb(brdp->iostatus);
- if ((status & EIO_IDBITMASK) == EIO_MK3)
- brdp->ioctrl++;
-
-/*
- * Handle board specific stuff now. The real difference is PCI
- * or not PCI.
- */
- if (brdp->brdtype == BRD_EASYIOPCI) {
- brdp->iosize1 = 0x80;
- brdp->iosize2 = 0x80;
- name = "serial(EIO-PCI)";
- outb(0x41, (brdp->ioaddr2 + 0x4c));
- } else {
- brdp->iosize1 = 8;
- name = "serial(EIO)";
- 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] | EIO_0WS |
- ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)),
- brdp->ioctrl);
- }
-
- if (check_region(brdp->ioaddr1, brdp->iosize1)) {
- printk("STALLION: Warning, board %d I/O address %x conflicts "
- "with another device\n", brdp->brdnr, brdp->ioaddr1);
- }
- if (brdp->iosize2 > 0) {
- if (check_region(brdp->ioaddr2, brdp->iosize2)) {
- printk("STALLION: Warning, board %d I/O address %x "
- "conflicts with another device\n",
- brdp->brdnr, brdp->ioaddr2);
- }
- }
-
-/*
- * Everything looks OK, so let's go ahead and probe for the hardware.
- */
- brdp->clk = CD1400_CLK;
- brdp->isr = stl_eiointr;
-
- switch (status & EIO_IDBITMASK) {
- case EIO_8PORTM:
- brdp->clk = CD1400_CLK8M;
- /* fall thru */
- case EIO_8PORTRS:
- case EIO_8PORTDI:
- brdp->nrports = 8;
- break;
- case EIO_4PORTRS:
- brdp->nrports = 4;
- break;
- case EIO_MK3:
- switch (status & EIO_BRDMASK) {
- case ID_BRD4:
- brdp->nrports = 4;
- break;
- case ID_BRD8:
- brdp->nrports = 8;
- break;
- case ID_BRD16:
- brdp->nrports = 16;
- break;
- default:
- return(-ENODEV);
- }
- break;
- default:
- return(-ENODEV);
- }
-
-/*
- * We have verfied that the board is actually present, so now we
- * can complete the setup.
- */
- request_region(brdp->ioaddr1, brdp->iosize1, name);
- if (brdp->iosize2 > 0)
- request_region(brdp->ioaddr2, brdp->iosize2, name);
-
- 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;
- if ((status & EIO_IDBITMASK) == EIO_MK3) {
- panelp->uartp = (void *) &stl_sc26198uart;
- panelp->isr = stl_sc26198intr;
- } else {
- panelp->uartp = (void *) &stl_cd1400uart;
- panelp->isr = stl_cd1400eiointr;
- }
-
- brdp->panels[0] = panelp;
- brdp->nrpanels = 1;
- brdp->state |= BRD_FOUND;
- brdp->hwid = status;
- rc = stl_mapirq(brdp->irq, name);
- 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 inline stl_initech(stlbrd_t *brdp)
-{
- stlpanel_t *panelp;
- unsigned int status, nxtid, ioaddr, conflict;
- int panelnr, banknr, i;
- char *name;
-
-#if DEBUG
- printk("stl_initech(brdp=%x)\n", (int) brdp);
-#endif
-
- status = 0;
- conflict = 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.
- */
- switch (brdp->brdtype) {
-
- case BRD_ECH:
- brdp->isr = stl_echatintr;
- 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);
- for (i = 0; (i < 10); i++)
- outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
- brdp->iosize1 = 2;
- brdp->iosize2 = 32;
- name = "serial(EC8/32)";
- outb(status, brdp->ioaddr1);
- break;
-
- case BRD_ECHMC:
- brdp->isr = stl_echmcaintr;
- 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);
- brdp->iosize1 = 64;
- name = "serial(EC8/32-MC)";
- break;
-
- case BRD_ECHPCI:
- brdp->isr = stl_echpciintr;
- brdp->ioctrl = brdp->ioaddr1 + 2;
- brdp->iosize1 = 4;
- brdp->iosize2 = 8;
- name = "serial(EC8/32-PCI)";
- break;
-
- case BRD_ECH64PCI:
- brdp->isr = stl_echpci64intr;
- brdp->ioctrl = brdp->ioaddr2 + 0x40;
- outb(0x43, (brdp->ioaddr1 + 0x4c));
- brdp->iosize1 = 0x80;
- brdp->iosize2 = 0x80;
- name = "serial(EC8/64-PCI)";
- break;
-
- default:
- printk("STALLION: unknown board type=%d\n", brdp->brdtype);
- return(-EINVAL);
- break;
- }
-
-/*
- * Check boards for possible IO address conflicts. We won't actually
- * do anything about it here, just issue a warning...
- */
- conflict = check_region(brdp->ioaddr1, brdp->iosize1) ?
- brdp->ioaddr1 : 0;
- if ((conflict == 0) && (brdp->iosize2 > 0))
- conflict = check_region(brdp->ioaddr2, brdp->iosize2) ?
- brdp->ioaddr2 : 0;
- if (conflict) {
- printk("STALLION: Warning, board %d I/O address %x conflicts "
- "with another device\n", brdp->brdnr, conflict);
- }
-
- request_region(brdp->ioaddr1, brdp->iosize1, name);
- if (brdp->iosize2 > 0)
- request_region(brdp->ioaddr2, brdp->iosize2, name);
-
-/*
- * Scan through the secondary io address space looking for panels.
- * As we find'em allocate and initialize panel structures for each.
- */
- brdp->clk = CD1400_CLK;
- brdp->hwid = status;
-
- ioaddr = brdp->ioaddr2;
- banknr = 0;
- 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;
- brdp->bnk2panel[banknr] = panelp;
- brdp->bnkpageaddr[banknr] = nxtid;
- brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS;
-
- if (status & ECH_PNLXPID) {
- panelp->uartp = (void *) &stl_sc26198uart;
- panelp->isr = stl_sc26198intr;
- if (status & ECH_PNL16PORT) {
- panelp->nrports = 16;
- brdp->bnk2panel[banknr] = panelp;
- brdp->bnkpageaddr[banknr] = nxtid;
- brdp->bnkstataddr[banknr++] = ioaddr + 4 +
- ECH_PNLSTATUS;
- } else {
- panelp->nrports = 8;
- }
- } else {
- panelp->uartp = (void *) &stl_cd1400uart;
- panelp->isr = stl_cd1400echintr;
- if (status & ECH_PNL16PORT) {
- panelp->nrports = 16;
- panelp->ackmask = 0x80;
- if (brdp->brdtype != BRD_ECHPCI)
- ioaddr += EREG_BANKSIZE;
- brdp->bnk2panel[banknr] = panelp;
- brdp->bnkpageaddr[banknr] = ++nxtid;
- brdp->bnkstataddr[banknr++] = ioaddr +
- ECH_PNLSTATUS;
- } else {
- panelp->nrports = 8;
- panelp->ackmask = 0xc0;
- }
- }
-
- nxtid++;
- ioaddr += EREG_BANKSIZE;
- brdp->nrports += panelp->nrports;
- brdp->panels[panelnr++] = panelp;
- if ((brdp->brdtype != BRD_ECHPCI) &&
- (ioaddr >= (brdp->ioaddr2 + brdp->iosize2)))
- break;
- }
-
- brdp->nrpanels = panelnr;
- brdp->nrbnks = banknr;
- if (brdp->brdtype == BRD_ECH)
- outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
-
- brdp->state |= BRD_FOUND;
- i = stl_mapirq(brdp->irq, name);
- 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 very different.
- */
-
-static int __init stl_brdinit(stlbrd_t *brdp)
-{
- int i;
-
-#if DEBUG
- printk("stl_brdinit(brdp=%x)\n", (int) brdp);
-#endif
-
- switch (brdp->brdtype) {
- case BRD_EASYIO:
- case BRD_EASYIOPCI:
- stl_initeio(brdp);
- break;
- case BRD_ECH:
- case BRD_ECHMC:
- case BRD_ECHPCI:
- case BRD_ECH64PCI:
- stl_initech(brdp);
- break;
- default:
- printk("STALLION: board=%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, board=%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, board=%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 the next available board number that is free.
- */
-
-static inline int stl_getbrdnr()
-{
- int i;
-
- for (i = 0; (i < STL_MAXBRDS); i++) {
- if (stl_brds[i] == (stlbrd_t *) NULL) {
- if (i >= stl_nrbrds)
- stl_nrbrds = i + 1;
- return(i);
- }
- }
- return(-1);
-}
-
-/*****************************************************************************/
-
-#ifdef CONFIG_PCI
-
-/*
- * We have a Stallion board. Allocate a board structure and
- * initialize it. Read its IO and IRQ resources from PCI
- * configuration space.
- */
-
-static inline int stl_initpcibrd(int brdtype, struct pci_dev *devp)
-{
- stlbrd_t *brdp;
-
-#if DEBUG
- printk("stl_initpcibrd(brdtype=%d,busnr=%x,devnr=%x)\n", brdtype,
- devp->bus->number, devp->devfn);
-#endif
-
- if (pci_enable_device(devp))
- return(-EIO);
- if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL)
- return(-ENOMEM);
- if ((brdp->brdnr = stl_getbrdnr()) < 0) {
- printk("STALLION: too many boards found, "
- "maximum supported %d\n", STL_MAXBRDS);
- return(0);
- }
- brdp->brdtype = brdtype;
-
-/*
- * Different Stallion boards use the BAR registers in different ways,
- * so set up io addresses based on board type.
- */
-#if DEBUG
- printk("%s(%d): BAR[]=%x,%x,%x,%x IRQ=%x\n", __FILE__, __LINE__,
- pci_resource_start(devp, 0), pci_resource_start(devp, 1),
- pci_resource_start(devp, 2), pci_resource_start(devp, 3), devp->irq);
-#endif
-
-/*
- * We have all resources from the board, so let's setup the actual
- * board structure now.
- */
- switch (brdtype) {
- case BRD_ECHPCI:
- brdp->ioaddr2 = pci_resource_start(devp, 0);
- brdp->ioaddr1 = pci_resource_start(devp, 1);
- break;
- case BRD_ECH64PCI:
- brdp->ioaddr2 = pci_resource_start(devp, 2);
- brdp->ioaddr1 = pci_resource_start(devp, 1);
- break;
- case BRD_EASYIOPCI:
- brdp->ioaddr1 = pci_resource_start(devp, 2);
- brdp->ioaddr2 = pci_resource_start(devp, 1);
- break;
- default:
- printk("STALLION: unknown PCI board type=%d\n", brdtype);
- break;
- }
-
- brdp->irq = devp->irq;
- stl_brdinit(brdp);
-
- return(0);
-}
-
-/*****************************************************************************/
-
-/*
- * Find all Stallion PCI boards that might be installed. Initialize each
- * one as it is found.
- */
-
-
-static inline int stl_findpcibrds()
-{
- struct pci_dev *dev = NULL;
- int i, rc;
-
-#if DEBUG
- printk("stl_findpcibrds()\n");
-#endif
-
- if (! pci_present())
- return(0);
-
- for (i = 0; (i < stl_nrpcibrds); i++)
- while ((dev = pci_find_device(stl_pcibrds[i].vendid,
- stl_pcibrds[i].devid, dev))) {
-
-/*
- * Found a device on the PCI bus that has our vendor and
- * device ID. Need to check now that it is really us.
- */
- if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
- continue;
-
- rc = stl_initpcibrd(stl_pcibrds[i].brdtype, dev);
- if (rc)
- return(rc);
- }
-
- 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 inline 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];
-#ifdef MODULE
- stl_parsebrd(confp, stl_brdsp[i]);
-#endif
- if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL)
- return(-ENOMEM);
- 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);
- }
-
-/*
- * Find any dynamically supported boards. That is via module load
- * line options or auto-detected on the PCI bus.
- */
-#ifdef MODULE
- stl_argbrds();
-#endif
-#ifdef CONFIG_PCI
- 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;
-
- copy_from_user(&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;
- }
-
- copy_to_user(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) {
- copy_from_user(&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);
-
- copy_to_user(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) {
- copy_from_user(&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;
- copy_to_user(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;
-
- copy_from_user(&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);
- copy_to_user((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;
-
- copy_from_user(&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);
- copy_to_user((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 __init stl_init(void)
-{
- printk(KERN_INFO "%s: version %s\n", stl_drvtitle, 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 (devfs_register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
- printk("STALLION: failed to register serial board device\n");
- devfs_handle = devfs_mk_dir (NULL, "staliomem", NULL);
- devfs_register_series (devfs_handle, "%u", 4, DEVFS_FL_DEFAULT,
- STL_SIOMEMMAJOR, 0,
- S_IFCHR | S_IRUSR | S_IWUSR,
- &stl_fsiomem, NULL);
-
-/*
- * 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.driver_name = stl_drvname;
- 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_serial.break_ctl = stl_breakctl;
- stl_serial.wait_until_sent = stl_waituntilsent;
- stl_serial.send_xchar = stl_sendxchar;
- stl_serial.read_proc = stl_readproc;
-
- stl_callout = stl_serial;
- stl_callout.name = stl_calloutname;
- stl_callout.major = STL_CALLOUTMAJOR;
- stl_callout.subtype = STL_DRVTYPCALLOUT;
- stl_callout.read_proc = 0;
-
- 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);
-}
-
-/*****************************************************************************/
-/* CD1400 HARDWARE FUNCTIONS */
-/*****************************************************************************/
-
-/*
- * 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_cd1400getreg(stlport_t *portp, int regnr)
-{
- outb((regnr + portp->uartaddr), portp->ioaddr);
- return(inb(portp->ioaddr + EREG_DATA));
-}
-
-static void stl_cd1400setreg(stlport_t *portp, int regnr, int value)
-{
- outb((regnr + portp->uartaddr), portp->ioaddr);
- outb(value, portp->ioaddr + EREG_DATA);
-}
-
-static int stl_cd1400updatereg(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);
-}
-
-/*****************************************************************************/
-
-/*
- * Inbitialize the UARTs in 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_cd1400panelinit(stlbrd_t *brdp, stlpanel_t *panelp)
-{
- unsigned int gfrcr;
- int chipmask, i, j;
- int nrchips, uartaddr, ioaddr;
-
-#if DEBUG
- printk("stl_panelinit(brdp=%x,panelp=%x)\n", (int) brdp, (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));
- }
-
- BRDDISABLE(panelp->brdnr);
- return(chipmask);
-}
-
-/*****************************************************************************/
-
-/*
- * Initialize hardware specific port registers.
- */
-
-static void stl_cd1400portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp)
-{
-#if DEBUG
- printk("stl_cd1400portinit(brdp=%x,panelp=%x,portp=%x)\n",
- (int) brdp, (int) panelp, (int) portp);
-#endif
-
- if ((brdp == (stlbrd_t *) NULL) || (panelp == (stlpanel_t *) NULL) ||
- (portp == (stlport_t *) NULL))
- return;
-
- portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) ||
- (portp->portnr < 8)) ? 0 : EREG_BANKSIZE);
- portp->uartaddr = (portp->portnr & 0x04) << 5;
- portp->pagenr = panelp->pagenr + (portp->portnr >> 3);
-
- BRDENABLE(portp->brdnr, portp->pagenr);
- stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
- stl_cd1400setreg(portp, LIVR, (portp->portnr << 3));
- portp->hwid = stl_cd1400getreg(portp, GFRCR);
- BRDDISABLE(portp->brdnr);
-}
-
-/*****************************************************************************/
-
-/*
- * 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_cd1400ccrwait(stlport_t *portp)
-{
- int i;
-
- for (i = 0; (i < CCR_MAXWAIT); i++) {
- if (stl_cd1400getreg(portp, CCR) == 0) {
- return;
- }
- }
-
- printk("STALLION: cd1400 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_cd1400setport(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 > 4))
- 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_SHI)
- baudrate = 230400;
- else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
- baudrate = 460800;
- else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
- baudrate = (portp->baud_base / portp->custom_divisor);
- }
- if (baudrate > STL_CD1400MAXBAUD)
- baudrate = STL_CD1400MAXBAUD;
-
- 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 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_cd1400setreg(portp, CAR, (portp->portnr & 0x3));
- srer = stl_cd1400getreg(portp, SRER);
- stl_cd1400setreg(portp, SRER, 0);
- if (stl_cd1400updatereg(portp, COR1, cor1))
- ccr = 1;
- if (stl_cd1400updatereg(portp, COR2, cor2))
- ccr = 1;
- if (stl_cd1400updatereg(portp, COR3, cor3))
- ccr = 1;
- if (ccr) {
- stl_cd1400ccrwait(portp);
- stl_cd1400setreg(portp, CCR, CCR_CORCHANGE);
- }
- stl_cd1400setreg(portp, COR4, cor4);
- stl_cd1400setreg(portp, COR5, cor5);
- stl_cd1400setreg(portp, MCOR1, mcor1);
- stl_cd1400setreg(portp, MCOR2, mcor2);
- if (baudrate > 0) {
- stl_cd1400setreg(portp, TCOR, clk);
- stl_cd1400setreg(portp, TBPR, div);
- stl_cd1400setreg(portp, RCOR, clk);
- stl_cd1400setreg(portp, RBPR, div);
- }
- stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
- stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
- stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
- stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
- stl_cd1400setreg(portp, RTPR, rtpr);
- mcor1 = stl_cd1400getreg(portp, MSVR1);
- if (mcor1 & MSVR1_DCD)
- portp->sigs |= TIOCM_CD;
- else
- portp->sigs &= ~TIOCM_CD;
- stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron));
- BRDDISABLE(portp->brdnr);
- restore_flags(flags);
-}
-
-/*****************************************************************************/
-
-/*
- * Set the state of the DTR and RTS signals.
- */
-
-static void stl_cd1400setsignals(stlport_t *portp, int dtr, int rts)
-{
- unsigned char msvr1, msvr2;
- unsigned long flags;
-
-#if DEBUG
- printk("stl_cd1400setsignals(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_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
- if (rts >= 0)
- stl_cd1400setreg(portp, MSVR2, msvr2);
- if (dtr >= 0)
- stl_cd1400setreg(portp, MSVR1, msvr1);
- BRDDISABLE(portp->brdnr);
- restore_flags(flags);
-}
-
-/*****************************************************************************/
-
-/*
- * Return the state of the signals.
- */
-
-static int stl_cd1400getsignals(stlport_t *portp)
-{
- unsigned char msvr1, msvr2;
- unsigned long flags;
- int sigs;
-
-#if DEBUG
- printk("stl_cd1400getsignals(portp=%x)\n", (int) portp);
-#endif
-
- save_flags(flags);
- cli();
- BRDENABLE(portp->brdnr, portp->pagenr);
- stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
- msvr1 = stl_cd1400getreg(portp, MSVR1);
- msvr2 = stl_cd1400getreg(portp, MSVR2);
- BRDDISABLE(portp->brdnr);
- restore_flags(flags);
-
- sigs = 0;
- sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
- sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
- sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
- sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
-#if 0
- sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
- sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
-#else
- sigs |= TIOCM_DSR;
-#endif
- return(sigs);
-}
-
-/*****************************************************************************/
-
-/*
- * Enable/Disable the Transmitter and/or Receiver.
- */
-
-static void stl_cd1400enablerxtx(stlport_t *portp, int rx, int tx)
-{
- unsigned char ccr;
- unsigned long flags;
-
-#if DEBUG
- printk("stl_cd1400enablerxtx(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_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
- stl_cd1400ccrwait(portp);
- stl_cd1400setreg(portp, CCR, ccr);
- stl_cd1400ccrwait(portp);
- BRDDISABLE(portp->brdnr);
- restore_flags(flags);
-}
-
-/*****************************************************************************/
-
-/*
- * Start/stop the Transmitter and/or Receiver.
- */
-
-static void stl_cd1400startrxtx(stlport_t *portp, int rx, int tx)
-{
- unsigned char sreron, sreroff;
- unsigned long flags;
-
-#if DEBUG
- printk("stl_cd1400startrxtx(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_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
- stl_cd1400setreg(portp, SRER,
- ((stl_cd1400getreg(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_cd1400disableintrs(stlport_t *portp)
-{
- unsigned long flags;
-
-#if DEBUG
- printk("stl_cd1400disableintrs(portp=%x)\n", (int) portp);
-#endif
- save_flags(flags);
- cli();
- BRDENABLE(portp->brdnr, portp->pagenr);
- stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
- stl_cd1400setreg(portp, SRER, 0);
- BRDDISABLE(portp->brdnr);
- restore_flags(flags);
-}
-
-/*****************************************************************************/
-
-static void stl_cd1400sendbreak(stlport_t *portp, int len)
-{
- unsigned long flags;
-
-#if DEBUG
- printk("stl_cd1400sendbreak(portp=%x,len=%d)\n", (int) portp, len);
-#endif
-
- save_flags(flags);
- cli();
- BRDENABLE(portp->brdnr, portp->pagenr);
- stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
- stl_cd1400setreg(portp, SRER,
- ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) |
- SRER_TXEMPTY));
- BRDDISABLE(portp->brdnr);
- portp->brklen = len;
- if (len == 1)
- portp->stats.txbreaks++;
- restore_flags(flags);
-}
-
-/*****************************************************************************/
-
-/*
- * Take flow control actions...
- */
-
-static void stl_cd1400flowctrl(stlport_t *portp, int state)
-{
- struct tty_struct *tty;
- unsigned long flags;
-
-#if DEBUG
- printk("stl_cd1400flowctrl(portp=%x,state=%x)\n", (int) portp, state);
-#endif
-
- if (portp == (stlport_t *) NULL)
- return;
- tty = portp->tty;
- if (tty == (struct tty_struct *) NULL)
- return;
-
- save_flags(flags);
- cli();
- BRDENABLE(portp->brdnr, portp->pagenr);
- stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
-
- if (state) {
- if (tty->termios->c_iflag & IXOFF) {
- stl_cd1400ccrwait(portp);
- stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
- portp->stats.rxxon++;
- stl_cd1400ccrwait(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_cd1400setreg(portp, MCOR1,
- (stl_cd1400getreg(portp, MCOR1) |
- FIFO_RTSTHRESHOLD));
- stl_cd1400setreg(portp, MSVR2, MSVR2_RTS);
- portp->stats.rxrtson++;
- }
- } else {
- if (tty->termios->c_iflag & IXOFF) {
- stl_cd1400ccrwait(portp);
- stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
- portp->stats.rxxoff++;
- stl_cd1400ccrwait(portp);
- }
- if (tty->termios->c_cflag & CRTSCTS) {
- stl_cd1400setreg(portp, MCOR1,
- (stl_cd1400getreg(portp, MCOR1) & 0xf0));
- stl_cd1400setreg(portp, MSVR2, 0);
- portp->stats.rxrtsoff++;
- }
- }
-
- BRDDISABLE(portp->brdnr);
- restore_flags(flags);
-}
-
-/*****************************************************************************/
-
-/*
- * Send a flow control character...
- */
-
-static void stl_cd1400sendflow(stlport_t *portp, int state)
-{
- struct tty_struct *tty;
- unsigned long flags;
-
-#if DEBUG
- printk("stl_cd1400sendflow(portp=%x,state=%x)\n", (int) portp, state);
-#endif
-
- if (portp == (stlport_t *) NULL)
- return;
- tty = portp->tty;
- if (tty == (struct tty_struct *) NULL)
- return;
-
- save_flags(flags);
- cli();
- BRDENABLE(portp->brdnr, portp->pagenr);
- stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
- if (state) {
- stl_cd1400ccrwait(portp);
- stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
- portp->stats.rxxon++;
- stl_cd1400ccrwait(portp);
- } else {
- stl_cd1400ccrwait(portp);
- stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
- portp->stats.rxxoff++;
- stl_cd1400ccrwait(portp);
- }
- BRDDISABLE(portp->brdnr);
- restore_flags(flags);
-}
-
-/*****************************************************************************/
-
-static void stl_cd1400flush(stlport_t *portp)
-{
- unsigned long flags;
-
-#if DEBUG
- printk("stl_cd1400flush(portp=%x)\n", (int) portp);
-#endif
-
- if (portp == (stlport_t *) NULL)
- return;
-
- save_flags(flags);
- cli();
- BRDENABLE(portp->brdnr, portp->pagenr);
- stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
- stl_cd1400ccrwait(portp);
- stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO);
- stl_cd1400ccrwait(portp);
- portp->tx.tail = portp->tx.head;
- BRDDISABLE(portp->brdnr);
- restore_flags(flags);
-}
-
-/*****************************************************************************/
-
-/*
- * Return the current state of data flow on this port. This is only
- * really interresting when determining if data has fully completed
- * transmission or not... This is easy for the cd1400, it accurately
- * maintains the busy port flag.
- */
-
-static int stl_cd1400datastate(stlport_t *portp)
-{
-#if DEBUG
- printk("stl_cd1400datastate(portp=%x)\n", (int) portp);
-#endif
-
- if (portp == (stlport_t *) NULL)
- return(0);
-
- return(test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0);
-}
-
-/*****************************************************************************/
-
-/*
- * Interrupt service routine for cd1400 EasyIO boards.
- */
-
-static void stl_cd1400eiointr(stlpanel_t *panelp, unsigned int iobase)
-{
- unsigned char svrtype;
-
-#if DEBUG
- printk("stl_cd1400eiointr(panelp=%x,iobase=%x)\n",
- (int) panelp, iobase);
-#endif
-
- outb(SVRR, iobase);
- svrtype = inb(iobase + EREG_DATA);
- if (panelp->nrports > 4) {
- outb((SVRR + 0x80), iobase);
- svrtype |= inb(iobase + EREG_DATA);
- }
-
- if (svrtype & SVRR_RX)
- stl_cd1400rxisr(panelp, iobase);
- else if (svrtype & SVRR_TX)
- stl_cd1400txisr(panelp, iobase);
- else if (svrtype & SVRR_MDM)
- stl_cd1400mdmisr(panelp, iobase);
-}
-
-/*****************************************************************************/
-
-/*
- * Interrupt service routine for cd1400 panels.
- */
-
-static void stl_cd1400echintr(stlpanel_t *panelp, unsigned int iobase)
-{
- unsigned char svrtype;
-
-#if DEBUG
- printk("stl_cd1400echintr(panelp=%x,iobase=%x)\n", (int) panelp,
- iobase);
-#endif
-
- outb(SVRR, iobase);
- svrtype = inb(iobase + EREG_DATA);
- outb((SVRR + 0x80), iobase);
- svrtype |= inb(iobase + EREG_DATA);
- if (svrtype & SVRR_RX)
- stl_cd1400rxisr(panelp, iobase);
- else if (svrtype & SVRR_TX)
- stl_cd1400txisr(panelp, iobase);
- else if (svrtype & SVRR_MDM)
- stl_cd1400mdmisr(panelp, iobase);
-}
-
-
-/*****************************************************************************/
-
-/*
- * Unfortunately we need to handle breaks in the TX data stream, since
- * this is the only way to generate them on the cd1400.
- */
-
-static inline int stl_cd1400breakisr(stlport_t *portp, int ioaddr)
-{
- if (portp->brklen == 1) {
- outb((COR2 + portp->uartaddr), ioaddr);
- outb((inb(ioaddr + EREG_DATA) | COR2_ETC),
- (ioaddr + EREG_DATA));
- outb((TDR + portp->uartaddr), ioaddr);
- outb(ETC_CMD, (ioaddr + EREG_DATA));
- outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
- outb((SRER + portp->uartaddr), ioaddr);
- outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)),
- (ioaddr + EREG_DATA));
- return(1);
- } else if (portp->brklen > 1) {
- outb((TDR + portp->uartaddr), ioaddr);
- outb(ETC_CMD, (ioaddr + EREG_DATA));
- outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
- portp->brklen = -1;
- return(1);
- } else {
- outb((COR2 + portp->uartaddr), ioaddr);
- outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC),
- (ioaddr + EREG_DATA));
- portp->brklen = 0;
- }
- 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 void stl_cd1400txisr(stlpanel_t *panelp, int ioaddr)
-{
- stlport_t *portp;
- int len, stlen;
- char *head, *tail;
- unsigned char ioack, srer;
-
-#if DEBUG
- printk("stl_cd1400txisr(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 (stl_cd1400breakisr(portp, ioaddr))
- goto stl_txalldone;
-
- 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(&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 void stl_cd1400rxisr(stlpanel_t *panelp, int ioaddr)
-{
- stlport_t *portp;
- struct tty_struct *tty;
- unsigned int ioack, len, buflen;
- unsigned char status;
- char ch;
-
-#if DEBUG
- printk("stl_cd1400rxisr(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)) {
- len = MIN(len, sizeof(stl_unwanted));
- outb((RDSR + portp->uartaddr), ioaddr);
- insb((ioaddr + EREG_DATA), &stl_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;
- if (portp->flags & ASYNC_SAK) {
- do_SAK(tty);
- BRDENABLE(portp->brdnr, portp->pagenr);
- }
- } 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 void stl_cd1400mdmisr(stlpanel_t *panelp, int ioaddr)
-{
- stlport_t *portp;
- unsigned int ioack;
- unsigned char misr;
-
-#if DEBUG
- printk("stl_cd1400mdmisr(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(&portp->tqueue, &tq_scheduler);
- portp->stats.modem++;
- }
-
- outb((EOSRR + portp->uartaddr), ioaddr);
- outb(0, (ioaddr + EREG_DATA));
-}
-
-/*****************************************************************************/
-/* SC26198 HARDWARE FUNCTIONS */
-/*****************************************************************************/
-
-/*
- * These functions get/set/update the registers of the sc26198 UARTs.
- * Access to the sc26198 registers is via an address/data io port pair.
- * (Maybe should make this inline...)
- */
-
-static int stl_sc26198getreg(stlport_t *portp, int regnr)
-{
- outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
- return(inb(portp->ioaddr + XP_DATA));
-}
-
-static void stl_sc26198setreg(stlport_t *portp, int regnr, int value)
-{
- outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
- outb(value, (portp->ioaddr + XP_DATA));
-}
-
-static int stl_sc26198updatereg(stlport_t *portp, int regnr, int value)
-{
- outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
- if (inb(portp->ioaddr + XP_DATA) != value) {
- outb(value, (portp->ioaddr + XP_DATA));
- return(1);
- }
- return(0);
-}
-
-/*****************************************************************************/
-
-/*
- * Functions to get and set the sc26198 global registers.
- */
-
-static int stl_sc26198getglobreg(stlport_t *portp, int regnr)
-{
- outb(regnr, (portp->ioaddr + XP_ADDR));
- return(inb(portp->ioaddr + XP_DATA));
-}
-
-#if 0
-static void stl_sc26198setglobreg(stlport_t *portp, int regnr, int value)
-{
- outb(regnr, (portp->ioaddr + XP_ADDR));
- outb(value, (portp->ioaddr + XP_DATA));
-}
-#endif
-
-/*****************************************************************************/
-
-/*
- * Inbitialize the UARTs in 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_sc26198panelinit(stlbrd_t *brdp, stlpanel_t *panelp)
-{
- int chipmask, i;
- int nrchips, ioaddr;
-
-#if DEBUG
- printk("stl_sc26198panelinit(brdp=%x,panelp=%x)\n",
- (int) brdp, (int) panelp);
-#endif
-
- BRDENABLE(panelp->brdnr, panelp->pagenr);
-
-/*
- * Check that each chip is present and started up OK.
- */
- chipmask = 0;
- nrchips = (panelp->nrports + 4) / SC26198_PORTS;
- if (brdp->brdtype == BRD_ECHPCI)
- outb(panelp->pagenr, brdp->ioctrl);
-
- for (i = 0; (i < nrchips); i++) {
- ioaddr = panelp->iobase + (i * 4);
- outb(SCCR, (ioaddr + XP_ADDR));
- outb(CR_RESETALL, (ioaddr + XP_DATA));
- outb(TSTR, (ioaddr + XP_ADDR));
- if (inb(ioaddr + XP_DATA) != 0) {
- printk("STALLION: sc26198 not responding, "
- "brd=%d panel=%d chip=%d\n",
- panelp->brdnr, panelp->panelnr, i);
- continue;
- }
- chipmask |= (0x1 << i);
- outb(GCCR, (ioaddr + XP_ADDR));
- outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA));
- outb(WDTRCR, (ioaddr + XP_ADDR));
- outb(0xff, (ioaddr + XP_DATA));
- }
-
- BRDDISABLE(panelp->brdnr);
- return(chipmask);
-}
-
-/*****************************************************************************/
-
-/*
- * Initialize hardware specific port registers.
- */
-
-static void stl_sc26198portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp)
-{
-#if DEBUG
- printk("stl_sc26198portinit(brdp=%x,panelp=%x,portp=%x)\n",
- (int) brdp, (int) panelp, (int) portp);
-#endif
-
- if ((brdp == (stlbrd_t *) NULL) || (panelp == (stlpanel_t *) NULL) ||
- (portp == (stlport_t *) NULL))
- return;
-
- portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4);
- portp->uartaddr = (portp->portnr & 0x07) << 4;
- portp->pagenr = panelp->pagenr;
- portp->hwid = 0x1;
-
- BRDENABLE(portp->brdnr, portp->pagenr);
- stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS);
- BRDDISABLE(portp->brdnr);
-}
-
-/*****************************************************************************/
-
-/*
- * Set up the sc26198 registers for a port based on the termios port
- * settings.
- */
-
-static void stl_sc26198setport(stlport_t *portp, struct termios *tiosp)
-{
- stlbrd_t *brdp;
- unsigned long flags;
- unsigned int baudrate;
- unsigned char mr0, mr1, mr2, clk;
- unsigned char imron, imroff, iopr, ipr;
-
- mr0 = 0;
- mr1 = 0;
- mr2 = 0;
- clk = 0;
- iopr = 0;
- imron = 0;
- imroff = 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.
- */
- portp->rxignoremsk = 0;
- if (tiosp->c_iflag & IGNPAR)
- portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING |
- SR_RXOVERRUN);
- if (tiosp->c_iflag & IGNBRK)
- portp->rxignoremsk |= SR_RXBREAK;
-
- portp->rxmarkmsk = SR_RXOVERRUN;
- if (tiosp->c_iflag & (INPCK | PARMRK))
- portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING);
- if (tiosp->c_iflag & BRKINT)
- portp->rxmarkmsk |= SR_RXBREAK;
-
-/*
- * Go through the char size, parity and stop bits and set all the
- * option register appropriately.
- */
- switch (tiosp->c_cflag & CSIZE) {
- case CS5:
- mr1 |= MR1_CS5;
- break;
- case CS6:
- mr1 |= MR1_CS6;
- break;
- case CS7:
- mr1 |= MR1_CS7;
- break;
- default:
- mr1 |= MR1_CS8;
- break;
- }
-
- if (tiosp->c_cflag & CSTOPB)
- mr2 |= MR2_STOP2;
- else
- mr2 |= MR2_STOP1;
-
- if (tiosp->c_cflag & PARENB) {
- if (tiosp->c_cflag & PARODD)
- mr1 |= (MR1_PARENB | MR1_PARODD);
- else
- mr1 |= (MR1_PARENB | MR1_PAREVEN);
- } else {
- mr1 |= MR1_PARNONE;
- }
-
- mr1 |= MR1_ERRBLOCK;
-
-/*
- * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing
- * space for hardware flow control and the like. This should be set to
- * VMIN.
- */
- mr2 |= MR2_RXFIFOHALF;
-
-/*
- * Calculate the baud rate timers. For now we will just assume that
- * the input and output baud are the same. The sc26198 has a fixed
- * baud rate table, so only discrete baud rates possible.
- */
- baudrate = tiosp->c_cflag & CBAUD;
- if (baudrate & CBAUDEX) {
- baudrate &= ~CBAUDEX;
- if ((baudrate < 1) || (baudrate > 4))
- 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_SHI)
- baudrate = 230400;
- else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
- baudrate = 460800;
- else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
- baudrate = (portp->baud_base / portp->custom_divisor);
- }
- if (baudrate > STL_SC26198MAXBAUD)
- baudrate = STL_SC26198MAXBAUD;
-
- if (baudrate > 0) {
- for (clk = 0; (clk < SC26198_NRBAUDS); clk++) {
- if (baudrate <= sc26198_baudtable[clk])
- break;
- }
- }
-
-/*
- * Check what form of modem signaling is required and set it up.
- */
- if (tiosp->c_cflag & CLOCAL) {
- portp->flags &= ~ASYNC_CHECK_CD;
- } else {
- iopr |= IOPR_DCDCOS;
- imron |= IR_IOPORT;
- portp->flags |= ASYNC_CHECK_CD;
- }
-
-/*
- * Setup sc26198 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) {
- mr0 |= MR0_SWFTX | MR0_SWFT;
- imron |= IR_XONXOFF;
- } else {
- imroff |= IR_XONXOFF;
- }
- if (tiosp->c_iflag & IXOFF)
- mr0 |= MR0_SWFRX;
-
- if (tiosp->c_cflag & CRTSCTS) {
- mr2 |= MR2_AUTOCTS;
- mr1 |= MR1_AUTORTS;
- }
-
-/*
- * All sc26198 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(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk);
- printk(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff);
- 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_sc26198setreg(portp, IMR, 0);
- stl_sc26198updatereg(portp, MR0, mr0);
- stl_sc26198updatereg(portp, MR1, mr1);
- stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK);
- stl_sc26198updatereg(portp, MR2, mr2);
- stl_sc26198updatereg(portp, IOPIOR,
- ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr));
-
- if (baudrate > 0) {
- stl_sc26198setreg(portp, TXCSR, clk);
- stl_sc26198setreg(portp, RXCSR, clk);
- }
-
- stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]);
- stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]);
-
- ipr = stl_sc26198getreg(portp, IPR);
- if (ipr & IPR_DCD)
- portp->sigs &= ~TIOCM_CD;
- else
- portp->sigs |= TIOCM_CD;
-
- portp->imr = (portp->imr & ~imroff) | imron;
- stl_sc26198setreg(portp, IMR, portp->imr);
- BRDDISABLE(portp->brdnr);
- restore_flags(flags);
-}
-
-/*****************************************************************************/
-
-/*
- * Set the state of the DTR and RTS signals.
- */
-
-static void stl_sc26198setsignals(stlport_t *portp, int dtr, int rts)
-{
- unsigned char iopioron, iopioroff;
- unsigned long flags;
-
-#if DEBUG
- printk("stl_sc26198setsignals(portp=%x,dtr=%d,rts=%d)\n",
- (int) portp, dtr, rts);
-#endif
-
- iopioron = 0;
- iopioroff = 0;
- if (dtr == 0)
- iopioroff |= IPR_DTR;
- else if (dtr > 0)
- iopioron |= IPR_DTR;
- if (rts == 0)
- iopioroff |= IPR_RTS;
- else if (rts > 0)
- iopioron |= IPR_RTS;
-
- save_flags(flags);
- cli();
- BRDENABLE(portp->brdnr, portp->pagenr);
- stl_sc26198setreg(portp, IOPIOR,
- ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron));
- BRDDISABLE(portp->brdnr);
- restore_flags(flags);
-}
-
-/*****************************************************************************/
-
-/*
- * Return the state of the signals.
- */
-
-static int stl_sc26198getsignals(stlport_t *portp)
-{
- unsigned char ipr;
- unsigned long flags;
- int sigs;
-
-#if DEBUG
- printk("stl_sc26198getsignals(portp=%x)\n", (int) portp);
-#endif
-
- save_flags(flags);
- cli();
- BRDENABLE(portp->brdnr, portp->pagenr);
- ipr = stl_sc26198getreg(portp, IPR);
- BRDDISABLE(portp->brdnr);
- restore_flags(flags);
-
- sigs = 0;
- sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD;
- sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS;
- sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR;
- sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS;
- sigs |= TIOCM_DSR;
- return(sigs);
-}
-
-/*****************************************************************************/
-
-/*
- * Enable/Disable the Transmitter and/or Receiver.
- */
-
-static void stl_sc26198enablerxtx(stlport_t *portp, int rx, int tx)
-{
- unsigned char ccr;
- unsigned long flags;
-
-#if DEBUG
- printk("stl_sc26198enablerxtx(portp=%x,rx=%d,tx=%d)\n",
- (int) portp, rx, tx);
-#endif
-
- ccr = portp->crenable;
- if (tx == 0)
- ccr &= ~CR_TXENABLE;
- else if (tx > 0)
- ccr |= CR_TXENABLE;
- if (rx == 0)
- ccr &= ~CR_RXENABLE;
- else if (rx > 0)
- ccr |= CR_RXENABLE;
-
- save_flags(flags);
- cli();
- BRDENABLE(portp->brdnr, portp->pagenr);
- stl_sc26198setreg(portp, SCCR, ccr);
- BRDDISABLE(portp->brdnr);
- portp->crenable = ccr;
- restore_flags(flags);
-}
-
-/*****************************************************************************/
-
-/*
- * Start/stop the Transmitter and/or Receiver.
- */
-
-static void stl_sc26198startrxtx(stlport_t *portp, int rx, int tx)
-{
- unsigned char imr;
- unsigned long flags;
-
-#if DEBUG
- printk("stl_sc26198startrxtx(portp=%x,rx=%d,tx=%d)\n",
- (int) portp, rx, tx);
-#endif
-
- imr = portp->imr;
- if (tx == 0)
- imr &= ~IR_TXRDY;
- else if (tx == 1)
- imr |= IR_TXRDY;
- if (rx == 0)
- imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG);
- else if (rx > 0)
- imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG;
-
- save_flags(flags);
- cli();
- BRDENABLE(portp->brdnr, portp->pagenr);
- stl_sc26198setreg(portp, IMR, imr);
- BRDDISABLE(portp->brdnr);
- portp->imr = imr;
- if (tx > 0)
- set_bit(ASYI_TXBUSY, &portp->istate);
- restore_flags(flags);
-}
-
-/*****************************************************************************/
-
-/*
- * Disable all interrupts from this port.
- */
-
-static void stl_sc26198disableintrs(stlport_t *portp)
-{
- unsigned long flags;
-
-#if DEBUG
- printk("stl_sc26198disableintrs(portp=%x)\n", (int) portp);
-#endif
-
- save_flags(flags);
- cli();
- BRDENABLE(portp->brdnr, portp->pagenr);
- portp->imr = 0;
- stl_sc26198setreg(portp, IMR, 0);
- BRDDISABLE(portp->brdnr);
- restore_flags(flags);
-}
-
-/*****************************************************************************/
-
-static void stl_sc26198sendbreak(stlport_t *portp, int len)
-{
- unsigned long flags;
-
-#if DEBUG
- printk("stl_sc26198sendbreak(portp=%x,len=%d)\n", (int) portp, len);
-#endif
-
- save_flags(flags);
- cli();
- BRDENABLE(portp->brdnr, portp->pagenr);
- if (len == 1) {
- stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK);
- portp->stats.txbreaks++;
- } else {
- stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK);
- }
- BRDDISABLE(portp->brdnr);
- restore_flags(flags);
-}
-
-/*****************************************************************************/
-
-/*
- * Take flow control actions...
- */
-
-static void stl_sc26198flowctrl(stlport_t *portp, int state)
-{
- struct tty_struct *tty;
- unsigned long flags;
- unsigned char mr0;
-
-#if DEBUG
- printk("stl_sc26198flowctrl(portp=%x,state=%x)\n", (int) portp, state);
-#endif
-
- if (portp == (stlport_t *) NULL)
- return;
- tty = portp->tty;
- if (tty == (struct tty_struct *) NULL)
- return;
-
- save_flags(flags);
- cli();
- BRDENABLE(portp->brdnr, portp->pagenr);
-
- if (state) {
- if (tty->termios->c_iflag & IXOFF) {
- mr0 = stl_sc26198getreg(portp, MR0);
- stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
- stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
- mr0 |= MR0_SWFRX;
- portp->stats.rxxon++;
- stl_sc26198wait(portp);
- stl_sc26198setreg(portp, MR0, mr0);
- }
-/*
- * 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_sc26198setreg(portp, MR1,
- (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS));
- stl_sc26198setreg(portp, IOPIOR,
- (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS));
- portp->stats.rxrtson++;
- }
- } else {
- if (tty->termios->c_iflag & IXOFF) {
- mr0 = stl_sc26198getreg(portp, MR0);
- stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
- stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
- mr0 &= ~MR0_SWFRX;
- portp->stats.rxxoff++;
- stl_sc26198wait(portp);
- stl_sc26198setreg(portp, MR0, mr0);
- }
- if (tty->termios->c_cflag & CRTSCTS) {
- stl_sc26198setreg(portp, MR1,
- (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS));
- stl_sc26198setreg(portp, IOPIOR,
- (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS));
- portp->stats.rxrtsoff++;
- }
- }
-
- BRDDISABLE(portp->brdnr);
- restore_flags(flags);
-}
-
-/*****************************************************************************/
-
-/*
- * Send a flow control character.
- */
-
-static void stl_sc26198sendflow(stlport_t *portp, int state)
-{
- struct tty_struct *tty;
- unsigned long flags;
- unsigned char mr0;
-
-#if DEBUG
- printk("stl_sc26198sendflow(portp=%x,state=%x)\n", (int) portp, state);
-#endif
-
- if (portp == (stlport_t *) NULL)
- return;
- tty = portp->tty;
- if (tty == (struct tty_struct *) NULL)
- return;
-
- save_flags(flags);
- cli();
- BRDENABLE(portp->brdnr, portp->pagenr);
- if (state) {
- mr0 = stl_sc26198getreg(portp, MR0);
- stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
- stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
- mr0 |= MR0_SWFRX;
- portp->stats.rxxon++;
- stl_sc26198wait(portp);
- stl_sc26198setreg(portp, MR0, mr0);
- } else {
- mr0 = stl_sc26198getreg(portp, MR0);
- stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
- stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
- mr0 &= ~MR0_SWFRX;
- portp->stats.rxxoff++;
- stl_sc26198wait(portp);
- stl_sc26198setreg(portp, MR0, mr0);
- }
- BRDDISABLE(portp->brdnr);
- restore_flags(flags);
-}
-
-/*****************************************************************************/
-
-static void stl_sc26198flush(stlport_t *portp)
-{
- unsigned long flags;
-
-#if DEBUG
- printk("stl_sc26198flush(portp=%x)\n", (int) portp);
-#endif
-
- if (portp == (stlport_t *) NULL)
- return;
-
- save_flags(flags);
- cli();
- BRDENABLE(portp->brdnr, portp->pagenr);
- stl_sc26198setreg(portp, SCCR, CR_TXRESET);
- stl_sc26198setreg(portp, SCCR, portp->crenable);
- BRDDISABLE(portp->brdnr);
- portp->tx.tail = portp->tx.head;
- restore_flags(flags);
-}
-
-/*****************************************************************************/
-
-/*
- * Return the current state of data flow on this port. This is only
- * really interresting when determining if data has fully completed
- * transmission or not... The sc26198 interrupt scheme cannot
- * determine when all data has actually drained, so we need to
- * check the port statusy register to be sure.
- */
-
-static int stl_sc26198datastate(stlport_t *portp)
-{
- unsigned long flags;
- unsigned char sr;
-
-#if DEBUG
- printk("stl_sc26198datastate(portp=%x)\n", (int) portp);
-#endif
-
- if (portp == (stlport_t *) NULL)
- return(0);
- if (test_bit(ASYI_TXBUSY, &portp->istate))
- return(1);
-
- save_flags(flags);
- cli();
- BRDENABLE(portp->brdnr, portp->pagenr);
- sr = stl_sc26198getreg(portp, SR);
- BRDDISABLE(portp->brdnr);
- restore_flags(flags);
-
- return((sr & SR_TXEMPTY) ? 0 : 1);
-}
-
-/*****************************************************************************/
-
-/*
- * Delay for a small amount of time, to give the sc26198 a chance
- * to process a command...
- */
-
-static void stl_sc26198wait(stlport_t *portp)
-{
- int i;
-
-#if DEBUG
- printk("stl_sc26198wait(portp=%x)\n", (int) portp);
-#endif
-
- if (portp == (stlport_t *) NULL)
- return;
-
- for (i = 0; (i < 20); i++)
- stl_sc26198getglobreg(portp, TSTR);
-}
-
-/*****************************************************************************/
-
-/*
- * If we are TX flow controlled and in IXANY mode then we may
- * need to unflow control here. We gotta do this because of the
- * automatic flow control modes of the sc26198.
- */
-
-static inline void stl_sc26198txunflow(stlport_t *portp, struct tty_struct *tty)
-{
- unsigned char mr0;
-
- mr0 = stl_sc26198getreg(portp, MR0);
- stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
- stl_sc26198setreg(portp, SCCR, CR_HOSTXON);
- stl_sc26198wait(portp);
- stl_sc26198setreg(portp, MR0, mr0);
- clear_bit(ASYI_TXFLOWED, &portp->istate);
-}
-
-/*****************************************************************************/
-
-/*
- * Interrupt service routine for sc26198 panels.
- */
-
-static void stl_sc26198intr(stlpanel_t *panelp, unsigned int iobase)
-{
- stlport_t *portp;
- unsigned int iack;
-
-/*
- * Work around bug in sc26198 chip... Cannot have A6 address
- * line of UART high, else iack will be returned as 0.
- */
- outb(0, (iobase + 1));
-
- iack = inb(iobase + XP_IACK);
- portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)];
-
- if (iack & IVR_RXDATA)
- stl_sc26198rxisr(portp, iack);
- else if (iack & IVR_TXDATA)
- stl_sc26198txisr(portp);
- else
- stl_sc26198otherisr(portp, iack);
-}
-
-/*****************************************************************************/
-
-/*
- * 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 sc26198 FIFO.
- * 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 void stl_sc26198txisr(stlport_t *portp)
-{
- unsigned int ioaddr;
- unsigned char mr0;
- int len, stlen;
- char *head, *tail;
-
-#if DEBUG
- printk("stl_sc26198txisr(portp=%x)\n", (int) portp);
-#endif
-
- ioaddr = portp->ioaddr;
- 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(&portp->tqueue, &tq_scheduler);
- }
-
- if (len == 0) {
- outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR));
- mr0 = inb(ioaddr + XP_DATA);
- if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) {
- portp->imr &= ~IR_TXRDY;
- outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR));
- outb(portp->imr, (ioaddr + XP_DATA));
- clear_bit(ASYI_TXBUSY, &portp->istate);
- } else {
- mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY);
- outb(mr0, (ioaddr + XP_DATA));
- }
- } else {
- len = MIN(len, SC26198_TXFIFOSIZE);
- portp->stats.txtotal += len;
- stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
- outb(GTXFIFO, (ioaddr + XP_ADDR));
- outsb((ioaddr + XP_DATA), tail, stlen);
- len -= stlen;
- tail += stlen;
- if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
- tail = portp->tx.buf;
- if (len > 0) {
- outsb((ioaddr + XP_DATA), tail, len);
- tail += len;
- }
- portp->tx.tail = tail;
- }
-}
-
-/*****************************************************************************/
-
-/*
- * 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 void stl_sc26198rxisr(stlport_t *portp, unsigned int iack)
-{
- struct tty_struct *tty;
- unsigned int len, buflen, ioaddr;
-
-#if DEBUG
- printk("stl_sc26198rxisr(portp=%x,iack=%x)\n", (int) portp, iack);
-#endif
-
- tty = portp->tty;
- ioaddr = portp->ioaddr;
- outb(GIBCR, (ioaddr + XP_ADDR));
- len = inb(ioaddr + XP_DATA) + 1;
-
- if ((iack & IVR_TYPEMASK) == IVR_RXDATA) {
- if ((tty == (struct tty_struct *) NULL) ||
- (tty->flip.char_buf_ptr == (char *) NULL) ||
- ((buflen = TTY_FLIPBUF_SIZE - tty->flip.count) == 0)) {
- len = MIN(len, sizeof(stl_unwanted));
- outb(GRXFIFO, (ioaddr + XP_ADDR));
- insb((ioaddr + XP_DATA), &stl_unwanted[0], len);
- portp->stats.rxlost += len;
- portp->stats.rxtotal += len;
- } else {
- len = MIN(len, buflen);
- if (len > 0) {
- outb(GRXFIFO, (ioaddr + XP_ADDR));
- insb((ioaddr + XP_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 {
- stl_sc26198rxbadchars(portp);
- }
-
-/*
- * If we are TX flow controlled and in IXANY mode then we may need
- * to unflow control here. We gotta do this because of the automatic
- * flow control modes of the sc26198.
- */
- if (test_bit(ASYI_TXFLOWED, &portp->istate)) {
- if ((tty != (struct tty_struct *) NULL) &&
- (tty->termios != (struct termios *) NULL) &&
- (tty->termios->c_iflag & IXANY)) {
- stl_sc26198txunflow(portp, tty);
- }
- }
-}
-
-/*****************************************************************************/
-
-/*
- * Process an RX bad character.
- */
-
-static void inline stl_sc26198rxbadch(stlport_t *portp, unsigned char status, char ch)
-{
- struct tty_struct *tty;
- unsigned int ioaddr;
-
- tty = portp->tty;
- ioaddr = portp->ioaddr;
-
- if (status & SR_RXPARITY)
- portp->stats.rxparity++;
- if (status & SR_RXFRAMING)
- portp->stats.rxframing++;
- if (status & SR_RXOVERRUN)
- portp->stats.rxoverrun++;
- if (status & SR_RXBREAK)
- portp->stats.rxbreaks++;
-
- if ((tty != (struct tty_struct *) NULL) &&
- ((portp->rxignoremsk & status) == 0)) {
- if (portp->rxmarkmsk & status) {
- if (status & SR_RXBREAK) {
- status = TTY_BREAK;
- if (portp->flags & ASYNC_SAK) {
- do_SAK(tty);
- BRDENABLE(portp->brdnr, portp->pagenr);
- }
- } else if (status & SR_RXPARITY) {
- status = TTY_PARITY;
- } else if (status & SR_RXFRAMING) {
- status = TTY_FRAME;
- } else if(status & SR_RXOVERRUN) {
- 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);
- }
-
- if (status == 0)
- portp->stats.rxtotal++;
- }
-}
-
-/*****************************************************************************/
-
-/*
- * Process all characters in the RX FIFO of the UART. Check all char
- * status bytes as well, and process as required. We need to check
- * all bytes in the FIFO, in case some more enter the FIFO while we
- * are here. To get the exact character error type we need to switch
- * into CHAR error mode (that is why we need to make sure we empty
- * the FIFO).
- */
-
-static void stl_sc26198rxbadchars(stlport_t *portp)
-{
- unsigned char status, mr1;
- char ch;
-
-/*
- * To get the precise error type for each character we must switch
- * back into CHAR error mode.
- */
- mr1 = stl_sc26198getreg(portp, MR1);
- stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK));
-
- while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) {
- stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR);
- ch = stl_sc26198getreg(portp, RXFIFO);
- stl_sc26198rxbadch(portp, status, ch);
- }
-
-/*
- * To get correct interrupt class we must switch back into BLOCK
- * error mode.
- */
- stl_sc26198setreg(portp, MR1, mr1);
-}
-
-/*****************************************************************************/
-
-/*
- * Other interrupt handler. This includes modem signals, flow
- * control actions, etc. Most stuff is left to off-level interrupt
- * processing time.
- */
-
-static void stl_sc26198otherisr(stlport_t *portp, unsigned int iack)
-{
- unsigned char cir, ipr, xisr;
-
-#if DEBUG
- printk("stl_sc26198otherisr(portp=%x,iack=%x)\n", (int) portp, iack);
-#endif
-
- cir = stl_sc26198getglobreg(portp, CIR);
-
- switch (cir & CIR_SUBTYPEMASK) {
- case CIR_SUBCOS:
- ipr = stl_sc26198getreg(portp, IPR);
- if (ipr & IPR_DCDCHANGE) {
- set_bit(ASYI_DCDCHANGE, &portp->istate);
- queue_task(&portp->tqueue, &tq_scheduler);
- portp->stats.modem++;
- }
- break;
- case CIR_SUBXONXOFF:
- xisr = stl_sc26198getreg(portp, XISR);
- if (xisr & XISR_RXXONGOT) {
- set_bit(ASYI_TXFLOWED, &portp->istate);
- portp->stats.txxoff++;
- }
- if (xisr & XISR_RXXOFFGOT) {
- clear_bit(ASYI_TXFLOWED, &portp->istate);
- portp->stats.txxon++;
- }
- break;
- case CIR_SUBBREAK:
- stl_sc26198setreg(portp, SCCR, CR_BREAKRESET);
- stl_sc26198rxbadchars(portp);
- break;
- default:
- break;
- }
-}
-
-/*****************************************************************************/
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)