patch-1.3.27 linux/drivers/char/stallion.c
Next file: linux/drivers/char/tty_io.c
Previous file: linux/drivers/char/psaux.c
Back to the patch index
Back to the overall index
- Lines: 2974
- Date:
Thu Sep 14 15:03:36 1995
- Orig file:
v1.3.26/linux/drivers/char/stallion.c
- Orig date:
Thu Jan 1 02:00:00 1970
diff -u --recursive --new-file v1.3.26/linux/drivers/char/stallion.c linux/drivers/char/stallion.c
@@ -0,0 +1,2973 @@
+/*****************************************************************************/
+
+/*
+ * stallion.c -- stallion multiport serial driver.
+ *
+ * Copyright (C) 1994,1995 Greg Ungerer (gerg@stallion.oz.au).
+ *
+ * This code is loosely based on the Linux serial driver, written by
+ * Linus Torvalds, Theodore T'so and others.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/*****************************************************************************/
+
+#ifdef MODULE
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#endif
+
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <linux/interrupt.h>
+#include <linux/termios.h>
+#include <linux/fcntl.h>
+#include <linux/tty_driver.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/serial.h>
+#include <linux/cd1400.h>
+#include <linux/string.h>
+#include <linux/malloc.h>
+#include <linux/ioport.h>
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/segment.h>
+
+#ifdef CONFIG_PCI
+#include <linux/pci.h>
+#include <linux/bios32.h>
+#endif
+
+/*****************************************************************************/
+
+/*
+ * Define different board types. At the moment I have only declared
+ * those boards that this driver supports. But I will use the standard
+ * "assigned" board numbers. In the future this driver will support
+ * some of the other Stallion boards. Currently supported boards are
+ * abbreviated as EIO = EasyIO and ECH = EasyConnection 8/32.
+ */
+#define BRD_EASYIO 20
+#define BRD_ECH 21
+#define BRD_ECHMC 22
+#define BRD_ECHPCI 26
+
+/*
+ * Define a configuration structure to hold the board configuration.
+ * Need to set this up in the code (for now) with the boards that are
+ * to be configured into the system. This is what needs to be modified
+ * when adding/removing/modifying boards. Each line entry in the
+ * stl_brdconf[] array is a board. Each line contains io/irq/memory
+ * ranges for that board (as well as what type of board it is).
+ * Some examples:
+ * { BRD_EASYIO, 0x2a0, 0, 0, 10, 0 }
+ * This line would configure an EasyIO board (4 or 8, no difference),
+ * at io addres 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
+ * addres 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 Registery.
+ */
+#ifndef STL_SERIALMAJOR
+#define STL_SERIALMAJOR 24
+#endif
+#ifndef STL_CALLOUTMAJOR
+#define STL_CALLOUTMAJOR 25
+#endif
+
+#define STL_DRVTYPSERIAL 1
+#define STL_DRVTYPCALLOUT 2
+
+#define STL_MAXBRDS 4
+#define STL_MAXPANELS 4
+#define STL_PORTSPERPANEL 16
+#define STL_MAXPORTS 64
+#define STL_MAXDEVS (STL_MAXBRDS * STL_MAXPORTS)
+
+/*
+ * I haven't really decided (or measured) what TX buffer size gives
+ * a good balance between performance and memory usage. These seem
+ * to work pretty well...
+ */
+#define STL_TXBUFLOW 256
+#define STL_TXBUFSIZE 2048
+
+/*****************************************************************************/
+
+/*
+ * Define our local driver identity first. Set up stuff to deal with
+ * all the local structures required by a serial tty driver.
+ */
+static char *stl_drvname = "Stallion Multiport Serial Driver";
+static char *stl_drvversion = "1.0.0";
+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 struct semaphore stl_tmpwritesem = MUTEX;
+
+/*
+ * Define a local default termios struct. All ports will be created
+ * with this termios initially. Basically all it defines is a raw port
+ * at 9600, 8 data bits, 1 stop bit.
+ */
+static struct termios stl_deftermios = {
+ 0,
+ 0,
+ (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
+ 0,
+ 0,
+ INIT_C_CC
+};
+
+/*
+ * 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;
+
+/*****************************************************************************/
+
+/*
+ * Define a set of structures to hold all the board/panel/port info
+ * for our ports. These will be dynamically allocated as required.
+ */
+
+/*
+ * Define a ring queue structure for each port. This will hold the
+ * TX data waiting to be output. Characters are fed into this buffer
+ * from the line discipline (or even direct from user space!) and
+ * then fed into the UARTs during interrupts. Will use a clasic ring
+ * queue here for this. The good thing about this type of ring queue
+ * is that the head and tail pointers can be updated without interrupt
+ * protection - since "write" code only needs to change the head, and
+ * interrupt code only needs to change the tail.
+ */
+typedef struct {
+ char *buf;
+ char *head;
+ char *tail;
+} stlrq_t;
+
+/*
+ * Port, panel and board structures to hold status info about each.
+ * The board structure contains pointers to structures for each panel
+ * connected to it, and in turn each panel structure contains pointers
+ * for each port structure for each port on that panel. Note that
+ * the port structure also contains the board and panel number that it
+ * is associated with, this makes it (fairly) easy to get back to the
+ * board/panel info for a port.
+ */
+typedef struct {
+ int portnr;
+ int panelnr;
+ int brdnr;
+ int ioaddr;
+ int uartaddr;
+ int pagenr;
+ int istate;
+ int flags;
+ int baud_base;
+ int custom_divisor;
+ int close_delay;
+ int closing_wait;
+ int refcount;
+ int openwaitcnt;
+ int brklen;
+ long session;
+ long pgrp;
+ unsigned int sigs;
+ unsigned int rxignoremsk;
+ unsigned int rxmarkmsk;
+ struct tty_struct *tty;
+ struct wait_queue *open_wait;
+ struct wait_queue *close_wait;
+ struct termios normaltermios;
+ struct termios callouttermios;
+ struct tq_struct tqueue;
+ stlrq_t tx;
+} stlport_t;
+
+typedef struct {
+ int panelnr;
+ int brdnr;
+ int pagenr;
+ int nrports;
+ int iobase;
+ unsigned int ackmask;
+ stlport_t *ports[STL_PORTSPERPANEL];
+} stlpanel_t;
+
+typedef struct {
+ int brdnr;
+ int brdtype;
+ int state;
+ int nrpanels;
+ int nrports;
+ int irq;
+ int irqtype;
+ unsigned int ioaddr1;
+ unsigned int ioaddr2;
+ unsigned int iostatus;
+ unsigned int ioctrl;
+ unsigned int ioctrlval;
+ stlpanel_t *panels[STL_MAXPANELS];
+} stlbrd_t;
+
+static stlbrd_t *stl_brds[STL_MAXBRDS];
+
+/*
+ * Per board state flags. Used with the state field of the board struct.
+ * Not really much here yet!
+ */
+#define BRD_FOUND 0x1
+
+/*
+ * Define the port structure istate flags. These set of flags are
+ * modified at interrupt time - so setting and reseting them needs
+ * to be atomic. Use the bit clear/setting routines for this.
+ */
+#define ASYI_TXBUSY 1
+#define ASYI_TXLOW 2
+#define ASYI_DCDCHANGE 3
+
+/*
+ * Define an array of board names as printable strings. Handy for
+ * referencing boards when printing trace and stuff.
+ */
+static char *stl_brdnames[] = {
+ (char *) NULL,
+ (char *) NULL,
+ (char *) NULL,
+ (char *) NULL,
+ (char *) NULL,
+ (char *) NULL,
+ (char *) NULL,
+ (char *) NULL,
+ (char *) NULL,
+ (char *) NULL,
+ (char *) NULL,
+ (char *) NULL,
+ (char *) NULL,
+ (char *) NULL,
+ (char *) NULL,
+ (char *) NULL,
+ (char *) NULL,
+ (char *) NULL,
+ (char *) NULL,
+ (char *) NULL,
+ "EasyIO",
+ "EC8/32-AT",
+ "EC8/32-MC",
+ (char *) NULL,
+ (char *) NULL,
+ (char *) NULL,
+ "EC8/32-PCI",
+};
+
+/*****************************************************************************/
+
+/*
+ * Hardware ID bits for the EasyIO and ECH boards. These defines apply
+ * to the directly accessable io ports of these boards (not the cd1400
+ * uarts - they are in cd1400.h).
+ */
+#define EIO_8PORTRS 0x04
+#define EIO_4PORTRS 0x05
+#define EIO_8PORTDI 0x00
+#define EIO_8PORTM 0x06
+#define EIO_IDBITMASK 0x07
+#define EIO_INTRPEND 0x08
+#define EIO_INTEDGE 0x00
+#define EIO_INTLEVEL 0x08
+
+#define ECH_ID 0xa0
+#define ECH_IDBITMASK 0xe0
+#define ECH_BRDENABLE 0x08
+#define ECH_BRDDISABLE 0x00
+#define ECH_INTENABLE 0x01
+#define ECH_INTDISABLE 0x00
+#define ECH_INTLEVEL 0x02
+#define ECH_INTEDGE 0x00
+#define ECH_INTRPEND 0x01
+#define ECH_BRDRESET 0x01
+
+#define ECHMC_INTENABLE 0x01
+#define ECHMC_BRDRESET 0x02
+
+#define ECH_PNLSTATUS 2
+#define ECH_PNL16PORT 0x20
+#define ECH_PNLIDMASK 0x07
+#define ECH_PNLINTRPEND 0x80
+#define ECH_ADDR2MASK 0x1e0
+
+/*
+ * Define the offsets within the register bank for all io registers.
+ * These io address offsets are common to both the EIO and ECH.
+ */
+#define EREG_ADDR 0
+#define EREG_DATA 4
+#define EREG_RXACK 5
+#define EREG_TXACK 6
+#define EREG_MDACK 7
+
+#define EREG_BANKSIZE 8
+
+/*
+ * Define the vector mapping bits for the programmable interrupt board
+ * hardware. These bits encode the interrupt for the board to use - it
+ * is software selectable (except the EIO-8M).
+ */
+static unsigned char stl_vecmap[] = {
+ 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07,
+ 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03
+};
+
+/*
+ * Set up enable and disable macros for the ECH boards. They require
+ * the secondary io address space to be activated and deactivated.
+ * This way all ECH boards can share their secondary io region.
+ * If this is an ECH-PCI board then also need to set the page pointer
+ * to point to the correct page.
+ */
+#define BRDENABLE(brdnr,pagenr) \
+ if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
+ outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \
+ stl_brds[(brdnr)]->ioctrl); \
+ else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \
+ outb((pagenr), stl_brds[(brdnr)]->ioctrl);
+
+#define BRDDISABLE(brdnr) \
+ if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
+ outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \
+ stl_brds[(brdnr)]->ioctrl);
+
+/*
+ * Define the cd1400 baud rate clocks. These are used when calculating
+ * what clock and divisor to use for the required baud rate. Also
+ * define the maximum baud rate allowed, and the default base baud.
+ */
+static int stl_cd1400clkdivs[] = {
+ CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4
+};
+
+#define STL_MAXBAUD 230400
+#define STL_BAUDBASE 115200
+#define STL_CLOSEDELAY 50
+
+/*****************************************************************************/
+
+/*
+ * Define macros to extract a brd/port number from a minor number.
+ */
+#define MKDEV2BRD(min) (((min) & 0xc0) >> 6)
+#define MKDEV2PORT(min) ((min) & 0x3f)
+
+/*
+ * Define a baud rate table that converts termios baud rate selector
+ * into the actual baud rate value. All baud rate calculates are based
+ * on the actual baud rate required.
+ */
+static unsigned int stl_baudrates[] = {
+ 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
+ 9600, 19200, 38400, 57600, 115200, 230400
+};
+
+/*****************************************************************************/
+
+/*
+ * Memory allocation vars. These keep track of what memory allocation
+ * we can currently use. They help deal with memory in a consistent
+ * way, whether during init or run-time.
+ */
+static int stl_meminited = 0;
+static long stl_memend;
+
+/*****************************************************************************/
+
+/*
+ * Define some handy local macros...
+ */
+#ifndef MIN
+#define MIN(a,b) (((a) <= (b)) ? (a) : (b))
+#endif
+
+/*****************************************************************************/
+
+/*
+ * Declare all those functions in this driver!
+ */
+
+#ifdef MODULE
+int init_module(void);
+void cleanup_module(void);
+#else
+static void stl_meminit(long base);
+static long stl_memhalt(void);
+#endif
+static void *stl_memalloc(int len);
+
+long stl_init(long kmem_start);
+static int stl_open(struct tty_struct *tty, struct file *filp);
+static void stl_close(struct tty_struct *tty, struct file *filp);
+static int stl_write(struct tty_struct *tty, int from_user, const unsigned char *buf, int count);
+static void stl_putchar(struct tty_struct *tty, unsigned char ch);
+static void stl_flushchars(struct tty_struct *tty);
+static int stl_writeroom(struct tty_struct *tty);
+static int stl_charsinbuffer(struct tty_struct *tty);
+static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
+static void stl_settermios(struct tty_struct *tty, struct termios *old);
+static void stl_throttle(struct tty_struct *tty);
+static void stl_unthrottle(struct tty_struct *tty);
+static void stl_stop(struct tty_struct *tty);
+static void stl_start(struct tty_struct *tty);
+static void stl_flushbuffer(struct tty_struct *tty);
+static void stl_hangup(struct tty_struct *tty);
+
+static int stl_initbrds(void);
+static int stl_brdinit(stlbrd_t *brdp);
+static int stl_initeio(stlbrd_t *brdp);
+static int stl_initech(stlbrd_t *brdp);
+static int stl_initports(stlbrd_t *brdp, stlpanel_t *panelp);
+static int stl_mapirq(int irq);
+static void stl_getserial(stlport_t *portp, struct serial_struct *sp);
+static int stl_setserial(stlport_t *portp, struct serial_struct *sp);
+static void stl_setreg(stlport_t *portp, int regnr, int value);
+static int stl_getreg(stlport_t *portp, int regnr);
+static int stl_updatereg(stlport_t *portp, int regnr, int value);
+static void stl_setport(stlport_t *portp, struct termios *tiosp);
+static void stl_getsignals(stlport_t *portp);
+static void stl_setsignals(stlport_t *portp, int dtr, int rts);
+static void stl_ccrwait(stlport_t *portp);
+static void stl_enablerxtx(stlport_t *portp, int rx, int tx);
+static void stl_startrxtx(stlport_t *portp, int rx, int tx);
+static void stl_disableintrs(stlport_t *portp);
+static void stl_sendbreak(stlport_t *portp, long len);
+static int stl_waitcarrier(stlport_t *portp, struct file *filp);
+static void stl_delay(int len);
+static void stl_intr(int irq, struct pt_regs *regs);
+static void stl_offintr(void *private);
+
+#ifdef CONFIG_PCI
+static int stl_findpcibrds(void);
+#endif
+
+/*****************************************************************************/
+
+#ifdef MODULE
+
+/*
+ * Use the kernel version number for modules.
+ */
+char kernel_version[] = UTS_RELEASE;
+
+int init_module()
+{
+ unsigned long flags;
+
+#if DEBUG
+ printk("init_module()\n");
+#endif
+
+ save_flags(flags);
+ cli();
+ stl_init(0);
+ 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("Unloading %s: version %s\n", stl_drvname, stl_drvversion);
+
+ save_flags(flags);
+ cli();
+
+/*
+ * Free up all allocated resources used by the ports. This includes
+ * memory and interrupts. As part of this process we will also do
+ * a hangup on every open port - to try and flush out any processes
+ * hanging onto ports.
+ */
+ i = tty_unregister_driver(&stl_serial);
+ j = tty_unregister_driver(&stl_callout);
+ if (i || j) {
+ printk("STALLION: failed to un-register tty driver, errno=%d,%d\n", -i, -j);
+ restore_flags(flags);
+ return;
+ }
+
+ if (stl_tmpwritebuf != (char *) NULL)
+ kfree_s(stl_tmpwritebuf, STL_TXBUFSIZE);
+
+ for (i = 0; (i < stl_nrbrds); i++) {
+ brdp = stl_brds[i];
+ for (j = 0; (j < STL_MAXPANELS); j++) {
+ panelp = brdp->panels[j];
+ if (panelp != (stlpanel_t *) NULL) {
+ for (k = 0; (k < STL_PORTSPERPANEL); k++) {
+ portp = panelp->ports[k];
+ if (portp != (stlport_t *) NULL) {
+ if (portp->tty != (struct tty_struct *) NULL)
+ stl_hangup(portp->tty);
+ if (portp->tx.buf != (char *) NULL)
+ kfree_s(portp->tx.buf, STL_TXBUFSIZE);
+ kfree_s(portp, sizeof(stlport_t));
+ }
+ }
+ kfree_s(panelp, sizeof(stlpanel_t));
+ }
+
+ }
+
+ if (brdp->brdtype == BRD_ECH) {
+ release_region(brdp->ioaddr1, 2);
+ release_region(brdp->ioaddr2, 32);
+ } else if (brdp->brdtype == BRD_ECHPCI) {
+ release_region(brdp->ioaddr1, 4);
+ release_region(brdp->ioaddr2, 8);
+ } else if (brdp->brdtype == BRD_ECHMC) {
+ release_region(brdp->ioaddr1, 64);
+ } else if (brdp->brdtype == BRD_EASYIO) {
+ release_region(brdp->ioaddr1, 8);
+ }
+
+ kfree_s(brdp, sizeof(stlbrd_t));
+ stl_brds[i] = (stlbrd_t *) NULL;
+ }
+
+ for (i = 0; (i < stl_numintrs); i++)
+ free_irq(stl_gotintrs[i]);
+
+ restore_flags(flags);
+}
+
+#endif
+
+/*****************************************************************************/
+
+/*
+ * Local memory allocation routines. These are used so we can deal with
+ * memory allocation at init time and during run-time in a consistent
+ * way. Everbody just calls the stl_memalloc routine to allocate
+ * memory and it will do the right thing.
+ */
+
+#ifndef MODULE
+
+static void stl_meminit(long base)
+{
+ stl_memend = base;
+ stl_meminited = 1;
+}
+
+static long stl_memhalt()
+{
+ stl_meminited = 0;
+ return(stl_memend);
+}
+
+#endif
+
+static void *stl_memalloc(int len)
+{
+ void *mem;
+
+ if (stl_meminited) {
+ mem = (void *) stl_memend;
+ stl_memend += len;
+ } else {
+ mem = (void *) kmalloc(len, GFP_KERNEL);
+ }
+ return(mem);
+}
+
+/*****************************************************************************/
+
+static int stl_open(struct tty_struct *tty, struct file *filp)
+{
+ stlport_t *portp;
+ stlbrd_t *brdp;
+ unsigned int minordev;
+ int brdnr, panelnr, portnr, rc;
+
+#if DEBUG
+ printk("stl_open(tty=%x,filp=%x): device=%x\n", (int) tty, (int) filp, tty->device);
+#endif
+
+ minordev = MINOR(tty->device);
+ brdnr = MKDEV2BRD(minordev);
+ if (brdnr >= stl_nrbrds)
+ return(-ENODEV);
+ brdp = stl_brds[brdnr];
+ if (brdp == (stlbrd_t *) NULL)
+ return(-ENODEV);
+ minordev = MKDEV2PORT(minordev);
+ for (portnr = -1, panelnr = 0; (panelnr < STL_MAXPANELS); panelnr++) {
+ if (brdp->panels[panelnr] == (stlpanel_t *) NULL)
+ break;
+ if (minordev < brdp->panels[panelnr]->nrports) {
+ portnr = minordev;
+ break;
+ }
+ minordev -= brdp->panels[panelnr]->nrports;
+ }
+ if (portnr < 0)
+ return(-ENODEV);
+
+ portp = brdp->panels[panelnr]->ports[portnr];
+ if (portp == (stlport_t *) NULL)
+ return(-ENODEV);
+
+/*
+ * On the first open of the device setup the port hardware, and
+ * initialize the per port data structure.
+ */
+ portp->tty = tty;
+ tty->driver_data = portp;
+ portp->refcount++;
+
+ if ((portp->flags & ASYNC_INITIALIZED) == 0) {
+ if (portp->tx.buf == (char *) NULL) {
+ portp->tx.buf = (char *) stl_memalloc(STL_TXBUFSIZE);
+ if (portp->tx.buf == (char *) NULL)
+ return(-ENOMEM);
+ portp->tx.head = portp->tx.buf;
+ portp->tx.tail = portp->tx.buf;
+ }
+ stl_setport(portp, tty->termios);
+ 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;
+
+#if DEBUG
+ printk("stl_waitcarrier(portp=%x,filp=%x)\n", (int) portp, (int) filp);
+#endif
+
+ rc = 0;
+
+ save_flags(flags);
+ cli();
+ portp->openwaitcnt++;
+ if (portp->refcount > 0)
+ portp->refcount--;
+
+ for (;;) {
+ if ((portp->flags & ASYNC_CALLOUT_ACTIVE) == 0)
+ stl_setsignals(portp, 1, 1);
+ if (tty_hung_up_p(filp) || ((portp->flags & ASYNC_INITIALIZED) == 0)) {
+ if (portp->flags & ASYNC_HUP_NOTIFY)
+ rc = -EBUSY;
+ else
+ rc = -ERESTARTSYS;
+ break;
+ }
+ if (((portp->flags & ASYNC_CALLOUT_ACTIVE) == 0) &&
+ ((portp->flags & ASYNC_CLOSING) == 0) &&
+ ((portp->tty->termios->c_cflag & CLOCAL) ||
+ (portp->sigs & TIOCM_CD))) {
+ break;
+ }
+ if (current->signal & ~current->blocked) {
+ rc = -ERESTARTSYS;
+ break;
+ }
+ interruptible_sleep_on(&portp->open_wait);
+ }
+
+ if (! tty_hung_up_p(filp))
+ portp->refcount++;
+ portp->openwaitcnt--;
+ restore_flags(flags);
+
+ return(rc);
+}
+
+/*****************************************************************************/
+
+static void stl_close(struct tty_struct *tty, struct file *filp)
+{
+ stlport_t *portp;
+ unsigned long flags;
+
+#if DEBUG
+ printk("stl_close(tty=%x,filp=%x)\n", (int) tty, (int) filp);
+#endif
+
+ portp = tty->driver_data;
+ if (portp == (stlport_t *) NULL)
+ return;
+
+ save_flags(flags);
+ cli();
+ if (tty_hung_up_p(filp)) {
+ restore_flags(flags);
+ return;
+ }
+ if (portp->refcount-- > 1) {
+ restore_flags(flags);
+ return;
+ }
+
+ portp->refcount = 0;
+ portp->flags |= ASYNC_CLOSING;
+
+ if (portp->flags & ASYNC_NORMAL_ACTIVE)
+ portp->normaltermios = *tty->termios;
+ if (portp->flags & ASYNC_CALLOUT_ACTIVE)
+ portp->callouttermios = *tty->termios;
+
+/*
+ * May want to wait for any data to drain before closing. The BUSY
+ * flag keeps track of whether we are still sending or not - it allows
+ * for the FIFO in the cd1400.
+ */
+ tty->closing = 1;
+ if (test_bit(ASYI_TXBUSY, &portp->istate)) {
+ if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
+ tty_wait_until_sent(tty, portp->closing_wait);
+ }
+
+ portp->flags &= ~ASYNC_INITIALIZED;
+ stl_disableintrs(portp);
+ if (tty->termios->c_cflag & HUPCL)
+ stl_setsignals(portp, 0, 0);
+ stl_enablerxtx(portp, 0, 0);
+ stl_flushbuffer(tty);
+ portp->istate = 0;
+ if (portp->tx.buf != (char *) NULL) {
+ kfree_s(portp->tx.buf, STL_TXBUFSIZE);
+ portp->tx.buf = (char *) NULL;
+ portp->tx.head = (char *) NULL;
+ portp->tx.tail = (char *) NULL;
+ }
+ set_bit(TTY_IO_ERROR, &tty->flags);
+ if (tty->ldisc.flush_buffer)
+ (tty->ldisc.flush_buffer)(tty);
+
+ tty->closing = 0;
+ tty->driver_data = (void *) NULL;
+ portp->tty = (struct tty_struct *) NULL;
+
+ if (portp->openwaitcnt) {
+ if (portp->close_delay)
+ stl_delay(portp->close_delay);
+ wake_up_interruptible(&portp->open_wait);
+ }
+
+ portp->flags &= ~(ASYNC_CALLOUT_ACTIVE | ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
+ wake_up_interruptible(&portp->close_wait);
+ restore_flags(flags);
+}
+
+/*****************************************************************************/
+
+/*
+ * Wait for a specified delay period, this is not a busy-loop. It will
+ * give up the processor while waiting. Unfortunately this has some
+ * rather intimate knowledge of the process management stuff.
+ */
+
+static void stl_delay(int len)
+{
+#if DEBUG
+ printk("stl_delay(len=%d)\n", len);
+#endif
+ if (len > 0) {
+ current->state = TASK_INTERRUPTIBLE;
+ current->timeout = jiffies + len;
+ schedule();
+ }
+}
+
+/*****************************************************************************/
+
+/*
+ * Write routine. Take data and stuff it in to the TX ring queue.
+ * If transmit interrupts are not running then start them.
+ */
+
+static int stl_write(struct tty_struct *tty, int from_user, const unsigned char *buf, int count)
+{
+ stlport_t *portp;
+ unsigned int len, stlen;
+ unsigned long flags;
+ unsigned char *chbuf;
+ char *head, *tail;
+
+#if DEBUG
+ printk("stl_write(tty=%x,from_user=%d,buf=%x,count=%d)\n", (int) tty, from_user, (int) buf, count);
+#endif
+
+ if ((tty == (struct tty_struct *) NULL) || (stl_tmpwritebuf == (char *) NULL))
+ return(0);
+ portp = tty->driver_data;
+ if (portp == (stlport_t *) NULL)
+ return(0);
+ if (portp->tx.buf == (char *) NULL)
+ return(0);
+
+/*
+ * If copying direct from user space we must cater for page faults,
+ * causing us to "sleep" here for a while. To handle this copy in all
+ * the data we need now, into a local buffer. Then when we got it all
+ * copy it into the TX buffer.
+ */
+ chbuf = (unsigned char *) buf;
+ if (from_user) {
+ head = portp->tx.head;
+ tail = portp->tx.tail;
+ len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) :
+ (tail - head - 1);
+ count = MIN(len, count);
+
+ save_flags(flags);
+ cli();
+ down(&stl_tmpwritesem);
+ memcpy_fromfs(stl_tmpwritebuf, chbuf, count);
+ up(&stl_tmpwritesem);
+ restore_flags(flags);
+ chbuf = &stl_tmpwritebuf[0];
+ }
+
+ head = portp->tx.head;
+ tail = portp->tx.tail;
+ if (head >= tail) {
+ len = STL_TXBUFSIZE - (head - tail) - 1;
+ stlen = STL_TXBUFSIZE - (head - portp->tx.buf);
+ } else {
+ len = tail - head - 1;
+ stlen = len;
+ }
+
+ len = MIN(len, count);
+ count = 0;
+ while (len > 0) {
+ stlen = MIN(len, stlen);
+ memcpy(head, chbuf, stlen);
+ len -= stlen;
+ chbuf += stlen;
+ count += stlen;
+ head += stlen;
+ if (head >= (portp->tx.buf + STL_TXBUFSIZE)) {
+ head = portp->tx.buf;
+ stlen = tail - head;
+ }
+ }
+ portp->tx.head = head;
+
+ clear_bit(ASYI_TXLOW, &portp->istate);
+ stl_startrxtx(portp, -1, 1);
+
+ return(count);
+}
+
+/*****************************************************************************/
+
+static void stl_putchar(struct tty_struct *tty, unsigned char ch)
+{
+ stlport_t *portp;
+ unsigned int len;
+ char *head, *tail;
+
+#if DEBUG
+ printk("stl_putchar(tty=%x,ch=%x)\n", (int) tty, (int) ch);
+#endif
+
+ if (tty == (struct tty_struct *) NULL)
+ return;
+ portp = tty->driver_data;
+ if (portp == (stlport_t *) NULL)
+ return;
+ if (portp->tx.buf == (char *) NULL)
+ return;
+
+ head = portp->tx.head;
+ tail = portp->tx.tail;
+
+ len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head);
+ len--;
+
+ if (len > 0) {
+ *head++ = ch;
+ if (head >= (portp->tx.buf + STL_TXBUFSIZE))
+ head = portp->tx.buf;
+ }
+ portp->tx.head = head;
+}
+
+/*****************************************************************************/
+
+/*
+ * If there are any characters in the buffer then make sure that TX
+ * interrupts are on and get'em out. Normally used after the putchar
+ * routine has been called.
+ */
+
+static void stl_flushchars(struct tty_struct *tty)
+{
+ stlport_t *portp;
+
+#if DEBUG
+ printk("stl_flushchars(tty=%x)\n", (int) tty);
+#endif
+
+ if (tty == (struct tty_struct *) NULL)
+ return;
+ portp = tty->driver_data;
+ if (portp == (stlport_t *) NULL)
+ return;
+ if (portp->tx.buf == (char *) NULL)
+ return;
+
+#if 0
+ if (tty->stopped || tty->hw_stopped || (portp->tx.head == portp->tx.tail))
+ return;
+#endif
+ stl_startrxtx(portp, -1, 1);
+}
+
+/*****************************************************************************/
+
+static int stl_writeroom(struct tty_struct *tty)
+{
+ stlport_t *portp;
+ char *head, *tail;
+
+#if DEBUG
+ printk("stl_writeroom(tty=%x)\n", (int) tty);
+#endif
+
+ if (tty == (struct tty_struct *) NULL)
+ return(0);
+ portp = tty->driver_data;
+ if (portp == (stlport_t *) NULL)
+ return(0);
+ if (portp->tx.buf == (char *) NULL)
+ return(0);
+
+ head = portp->tx.head;
+ tail = portp->tx.tail;
+ return((head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1));
+}
+
+/*****************************************************************************/
+
+/*
+ * Return number of chars in the TX buffer. Normally we would just
+ * calculate the number of chars in the buffer and return that, but if
+ * the buffer is empty and TX interrupts are still on then we return
+ * that the buffer still has 1 char in it. This way whoever called us
+ * will not think that ALL chars have drained - since the UART still
+ * must have some chars in it (we are busy after all).
+ */
+
+static int stl_charsinbuffer(struct tty_struct *tty)
+{
+ stlport_t *portp;
+ unsigned int size;
+ char *head, *tail;
+
+#if DEBUG
+ printk("stl_charsinbuffer(tty=%x)\n", (int) tty);
+#endif
+
+ if (tty == (struct tty_struct *) NULL)
+ return(0);
+ portp = tty->driver_data;
+ if (portp == (stlport_t *) NULL)
+ return(0);
+ if (portp->tx.buf == (char *) NULL)
+ return(0);
+
+ head = portp->tx.head;
+ tail = portp->tx.tail;
+ size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
+ if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate))
+ size = 1;
+ return(size);
+}
+
+/*****************************************************************************/
+
+/*
+ * Generate the serial struct info.
+ */
+
+static void stl_getserial(stlport_t *portp, struct serial_struct *sp)
+{
+ struct serial_struct sio;
+ stlbrd_t *brdp;
+
+#if DEBUG
+ printk("stl_getserial(portp=%x,sp=%x)\n", (int) portp, (int) sp);
+#endif
+
+ memset(&sio, 0, sizeof(struct serial_struct));
+ sio.type = PORT_CIRRUS;
+ sio.line = portp->portnr;
+ sio.port = portp->ioaddr;
+ sio.flags = portp->flags;
+ sio.baud_base = portp->baud_base;
+ sio.close_delay = portp->close_delay;
+ sio.closing_wait = portp->closing_wait;
+ sio.custom_divisor = portp->custom_divisor;
+ sio.xmit_fifo_size = CD1400_TXFIFOSIZE;
+ sio.hub6 = 0;
+
+ brdp = stl_brds[portp->brdnr];
+ if (brdp != (stlbrd_t *) NULL)
+ sio.irq = brdp->irq;
+
+ memcpy_tofs(sp, &sio, sizeof(struct serial_struct));
+}
+
+/*****************************************************************************/
+
+/*
+ * Set port according to the serial struct info.
+ * At this point we do not do any auto-configure stuff, so we will
+ * just quietly ignore any requests to change irq, etc.
+ */
+
+static int stl_setserial(stlport_t *portp, struct serial_struct *sp)
+{
+ struct serial_struct sio;
+
+#if DEBUG
+ printk("stl_setserial(portp=%x,sp=%x)\n", (int) portp, (int) sp);
+#endif
+
+ memcpy_fromfs(&sio, sp, sizeof(struct serial_struct));
+ if (!suser()) {
+ if ((sio.baud_base != portp->baud_base) ||
+ (sio.close_delay != portp->close_delay) ||
+ ((sio.flags & ~ASYNC_USR_MASK) != (portp->flags & ~ASYNC_USR_MASK)))
+ return(-EPERM);
+ }
+
+ portp->flags = (portp->flags & ~ASYNC_USR_MASK) | (sio.flags & ASYNC_USR_MASK);
+ portp->baud_base = sio.baud_base;
+ portp->close_delay = sio.close_delay;
+ portp->closing_wait = sio.closing_wait;
+ portp->custom_divisor = sio.custom_divisor;
+ stl_setport(portp, portp->tty->termios);
+ return(0);
+}
+
+/*****************************************************************************/
+
+static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
+{
+ stlport_t *portp;
+ int rc;
+
+#if DEBUG
+ printk("stl_ioctl(tty=%x,file=%x,cmd=%x,arg=%x)\n", (int) tty, (int) file, cmd, (int) arg);
+#endif
+
+ if (tty == (struct tty_struct *) NULL)
+ return(-ENODEV);
+ portp = tty->driver_data;
+ if (portp == (stlport_t *) NULL)
+ return(-ENODEV);
+
+ rc = 0;
+
+ switch (cmd) {
+ case TCSBRK:
+ if ((rc = tty_check_change(tty)) == 0) {
+ tty_wait_until_sent(tty, 0);
+ if (! arg)
+ stl_sendbreak(portp, 250);
+ }
+ break;
+ case TCSBRKP:
+ if ((rc = tty_check_change(tty)) == 0) {
+ tty_wait_until_sent(tty, 0);
+ stl_sendbreak(portp, (arg ? (arg * 100) : 250));
+ }
+ break;
+ case TIOCGSOFTCAR:
+ if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(long))) == 0)
+ put_fs_long(((tty->termios->c_cflag & CLOCAL) ? 1 : 0), (unsigned long *) arg);
+ break;
+ case TIOCSSOFTCAR:
+ if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(long))) == 0) {
+ arg = get_fs_long((unsigned long *) arg);
+ tty->termios->c_cflag = (tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0);
+ }
+ break;
+ case TIOCMGET:
+ if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(unsigned int))) == 0) {
+ stl_getsignals(portp);
+ put_fs_long(portp->sigs, (unsigned long *) arg);
+ }
+ break;
+ case TIOCMBIS:
+ if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(long))) == 0) {
+ arg = get_fs_long((unsigned long *) arg);
+ stl_setsignals(portp, ((arg & TIOCM_DTR) ? 1 : -1), ((arg & TIOCM_RTS) ? 1 : -1));
+ }
+ break;
+ case TIOCMBIC:
+ if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(long))) == 0) {
+ arg = get_fs_long((unsigned long *) arg);
+ stl_setsignals(portp, ((arg & TIOCM_DTR) ? 0 : -1), ((arg & TIOCM_RTS) ? 0 : -1));
+ }
+ break;
+ case TIOCMSET:
+ if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(long))) == 0) {
+ arg = get_fs_long((unsigned long *) arg);
+ stl_setsignals(portp, ((arg & TIOCM_DTR) ? 1 : 0), ((arg & TIOCM_RTS) ? 1 : 0));
+ }
+ break;
+ case TIOCGSERIAL:
+ if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(struct serial_struct))) == 0)
+ stl_getserial(portp, (struct serial_struct *) arg);
+ break;
+ case TIOCSSERIAL:
+ if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(struct serial_struct))) == 0)
+ rc = stl_setserial(portp, (struct serial_struct *) arg);
+ break;
+ case TIOCSERCONFIG:
+ case TIOCSERGWILD:
+ case TIOCSERSWILD:
+ case TIOCSERGETLSR:
+ case TIOCSERGSTRUCT:
+ case TIOCSERGETMULTI:
+ case TIOCSERSETMULTI:
+ default:
+ rc = -ENOIOCTLCMD;
+ break;
+ }
+
+ return(rc);
+}
+
+/*****************************************************************************/
+
+static void stl_settermios(struct tty_struct *tty, struct termios *old)
+{
+ stlport_t *portp;
+ struct termios *tiosp;
+
+#if DEBUG
+ printk("stl_settermios(tty=%x,old=%x)\n", (int) tty, (int) old);
+#endif
+
+ if (tty == (struct tty_struct *) NULL)
+ return;
+ portp = tty->driver_data;
+ if (portp == (stlport_t *) NULL)
+ return;
+
+ tiosp = tty->termios;
+ if ((tiosp->c_cflag == old->c_cflag) && (tiosp->c_iflag == old->c_iflag))
+ return;
+
+ stl_setport(portp, tiosp);
+ stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0), -1);
+ if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) {
+ tty->hw_stopped = 0;
+ stl_start(tty);
+ }
+ if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
+ wake_up_interruptible(&portp->open_wait);
+}
+
+/*****************************************************************************/
+
+/*
+ * Attempt to flow control who ever is sending us data. Based on termios
+ * settings use software or/and hardware flow control.
+ */
+
+static void stl_throttle(struct tty_struct *tty)
+{
+ stlport_t *portp;
+ unsigned long flags;
+
+#if DEBUG
+ printk("stl_throttle(tty=%x)\n", (int) tty);
+#endif
+
+ if (tty == (struct tty_struct *) NULL)
+ return;
+ portp = tty->driver_data;
+ if (portp == (stlport_t *) NULL)
+ return;
+
+ save_flags(flags);
+ cli();
+ BRDENABLE(portp->brdnr, portp->pagenr);
+ stl_setreg(portp, CAR, (portp->portnr & 0x03));
+ if (tty->termios->c_iflag & IXOFF) {
+ stl_ccrwait(portp);
+ stl_setreg(portp, CCR, CCR_SENDSCHR2);
+ stl_ccrwait(portp);
+ }
+ if (tty->termios->c_cflag & CRTSCTS) {
+ stl_setreg(portp, MCOR1, (stl_getreg(portp, MCOR1) & 0xf0));
+ stl_setreg(portp, MSVR2, 0);
+ }
+ BRDDISABLE(portp->brdnr);
+ restore_flags(flags);
+}
+
+/*****************************************************************************/
+
+/*
+ * Unflow control the device sending us data...
+ */
+
+static void stl_unthrottle(struct tty_struct *tty)
+{
+ stlport_t *portp;
+ unsigned long flags;
+
+#if DEBUG
+ printk("stl_unthrottle(tty=%x)\n", (int) tty);
+#endif
+
+ if (tty == (struct tty_struct *) NULL)
+ return;
+ portp = tty->driver_data;
+ if (portp == (stlport_t *) NULL)
+ return;
+
+ save_flags(flags);
+ cli();
+ BRDENABLE(portp->brdnr, portp->pagenr);
+ stl_setreg(portp, CAR, (portp->portnr & 0x03));
+ if (tty->termios->c_iflag & IXOFF) {
+ stl_ccrwait(portp);
+ stl_setreg(portp, CCR, CCR_SENDSCHR1);
+ stl_ccrwait(portp);
+ }
+/*
+ * Question: should we return RTS to what it was before? It may have
+ * been set by an ioctl... Suppose not, since if you have hardware
+ * flow control set then it is pretty silly to go and set the RTS line
+ * by hand.
+ */
+ if (tty->termios->c_cflag & CRTSCTS) {
+ stl_setreg(portp, MCOR1, (stl_getreg(portp, MCOR1) | FIFO_RTSTHRESHOLD));
+ stl_setreg(portp, MSVR2, MSVR2_RTS);
+ }
+ BRDDISABLE(portp->brdnr);
+ restore_flags(flags);
+}
+
+/*****************************************************************************/
+
+/*
+ * Stop the transmitter. Basically to do this we will just turn TX
+ * interrupts off.
+ */
+
+static void stl_stop(struct tty_struct *tty)
+{
+ stlport_t *portp;
+
+#if DEBUG
+ printk("stl_stop(tty=%x)\n", (int) tty);
+#endif
+
+ if (tty == (struct tty_struct *) NULL)
+ return;
+ portp = tty->driver_data;
+ if (portp == (stlport_t *) NULL)
+ return;
+
+ stl_startrxtx(portp, -1, 0);
+}
+
+/*****************************************************************************/
+
+/*
+ * Start the transmitter again. Just turn TX interrupts back on.
+ */
+
+static void stl_start(struct tty_struct *tty)
+{
+ stlport_t *portp;
+
+#if DEBUG
+ printk("stl_start(tty=%x)\n", (int) tty);
+#endif
+
+ if (tty == (struct tty_struct *) NULL)
+ return;
+ portp = tty->driver_data;
+ if (portp == (stlport_t *) NULL)
+ return;
+
+ stl_startrxtx(portp, -1, 1);
+}
+
+/*****************************************************************************/
+
+/*
+ * Hangup this port. This is pretty much like closing the port, only
+ * a little more brutal. No waiting for data to drain. Shutdown the
+ * port and maybe drop signals.
+ */
+
+static void stl_hangup(struct tty_struct *tty)
+{
+ stlport_t *portp;
+
+#if DEBUG
+ printk("stl_hangup(tty=%x)\n", (int) tty);
+#endif
+
+ if (tty == (struct tty_struct *) NULL)
+ return;
+ portp = tty->driver_data;
+ if (portp == (stlport_t *) NULL)
+ return;
+
+ portp->flags &= ~ASYNC_INITIALIZED;
+ stl_disableintrs(portp);
+ if (tty->termios->c_cflag & HUPCL)
+ stl_setsignals(portp, 0, 0);
+ stl_enablerxtx(portp, 0, 0);
+ stl_flushbuffer(tty);
+ portp->istate = 0;
+ set_bit(TTY_IO_ERROR, &tty->flags);
+ if (portp->tx.buf != (char *) NULL) {
+ kfree_s(portp->tx.buf, STL_TXBUFSIZE);
+ portp->tx.buf = (char *) NULL;
+ portp->tx.head = (char *) NULL;
+ portp->tx.tail = (char *) NULL;
+ }
+ tty->driver_data = (void *) NULL;
+ portp->tty = (struct tty_struct *) NULL;
+ portp->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CALLOUT_ACTIVE);
+ portp->refcount = 0;
+ wake_up_interruptible(&portp->open_wait);
+}
+
+/*****************************************************************************/
+
+static void stl_flushbuffer(struct tty_struct *tty)
+{
+ stlport_t *portp;
+ unsigned long flags;
+
+#if DEBUG
+ printk("stl_flushbuffer(tty=%x)\n", (int) tty);
+#endif
+
+ if (tty == (struct tty_struct *) NULL)
+ return;
+ portp = tty->driver_data;
+ if (portp == (stlport_t *) NULL)
+ return;
+
+ save_flags(flags);
+ cli();
+ BRDENABLE(portp->brdnr, portp->pagenr);
+ stl_setreg(portp, CAR, (portp->portnr & 0x03));
+ stl_ccrwait(portp);
+ stl_setreg(portp, CCR, CCR_TXFLUSHFIFO);
+ stl_ccrwait(portp);
+ portp->tx.tail = portp->tx.head;
+ BRDDISABLE(portp->brdnr);
+ restore_flags(flags);
+
+ wake_up_interruptible(&tty->write_wait);
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
+ (tty->ldisc.write_wakeup)(tty);
+}
+
+/*****************************************************************************/
+
+/*
+ * These functions get/set/update the registers of the cd1400 UARTs.
+ * Access to the cd1400 registers is via an address/data io port pair.
+ * (Maybe should make this inline...)
+ */
+
+static int stl_getreg(stlport_t *portp, int regnr)
+{
+ outb((regnr + portp->uartaddr), portp->ioaddr);
+ return(inb(portp->ioaddr + EREG_DATA));
+}
+
+static void stl_setreg(stlport_t *portp, int regnr, int value)
+{
+ outb((regnr + portp->uartaddr), portp->ioaddr);
+ outb(value, portp->ioaddr + EREG_DATA);
+}
+
+static int stl_updatereg(stlport_t *portp, int regnr, int value)
+{
+ outb((regnr + portp->uartaddr), portp->ioaddr);
+ if (inb(portp->ioaddr + EREG_DATA) != value) {
+ outb(value, portp->ioaddr + EREG_DATA);
+ return(1);
+ }
+ return(0);
+}
+
+/*****************************************************************************/
+
+/*
+ * Transmit interrupt handler. This has gotta be fast! Handling TX
+ * chars is pretty simple, stuff as many as possible from the TX buffer
+ * into the cd1400 FIFO. Must also handle TX breaks here, since they
+ * are embedded as commands in the data stream. Oh no, had to use a goto!
+ * This could be optimized more, will do when I get time...
+ * In practice it is possible that interrupts are enabled but that the
+ * port has been hung up. Need to handle not having any TX buffer here,
+ * this is done by using the side effect that head and tail will also
+ * be NULL if the buffer has been freed.
+ */
+
+static inline void stl_txisr(stlpanel_t *panelp, int ioaddr)
+{
+ stlport_t *portp;
+ int len, stlen;
+ char *head, *tail;
+ unsigned char ioack, srer;
+
+#if DEBUG
+ printk("stl_txisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr);
+#endif
+
+ ioack = inb(ioaddr + EREG_TXACK);
+ if (((ioack & panelp->ackmask) != 0) || ((ioack & ACK_TYPMASK) != ACK_TYPTX)) {
+ printk("STALLION: bad TX interrupt ack value=%x\n", ioack);
+ return;
+ }
+ portp = panelp->ports[(ioack >> 3)];
+
+/*
+ * Unfortunately we need to handle breaks in the data stream, since
+ * this is the only way to generate them on the cd1400. Do it now if
+ * a break is to be sent.
+ */
+ if (portp->brklen != 0) {
+ if (portp->brklen > 0) {
+ outb((TDR + portp->uartaddr), ioaddr);
+ outb(ETC_CMD, (ioaddr + EREG_DATA));
+ outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
+ outb(ETC_CMD, (ioaddr + EREG_DATA));
+ outb(ETC_DELAY, (ioaddr + EREG_DATA));
+ outb(portp->brklen, (ioaddr + EREG_DATA));
+ outb(ETC_CMD, (ioaddr + EREG_DATA));
+ outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
+ portp->brklen = -1;
+ goto stl_txalldone;
+ } else {
+ outb((COR2 + portp->uartaddr), ioaddr);
+ outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC), (ioaddr + EREG_DATA));
+ portp->brklen = 0;
+ }
+ }
+
+ head = portp->tx.head;
+ tail = portp->tx.tail;
+ len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
+ if ((len == 0) || ((len < STL_TXBUFLOW) && (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
+ set_bit(ASYI_TXLOW, &portp->istate);
+ queue_task_irq_off(&portp->tqueue, &tq_scheduler);
+ }
+
+ if (len == 0) {
+ outb((SRER + portp->uartaddr), ioaddr);
+ srer = inb(ioaddr + EREG_DATA);
+ if (srer & SRER_TXDATA) {
+ srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY;
+ } else {
+ srer &= ~(SRER_TXDATA | SRER_TXEMPTY);
+ clear_bit(ASYI_TXBUSY, &portp->istate);
+ }
+ outb(srer, (ioaddr + EREG_DATA));
+ } else {
+ len = MIN(len, CD1400_TXFIFOSIZE);
+ stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
+ outb((TDR + portp->uartaddr), ioaddr);
+ outsb((ioaddr + EREG_DATA), tail, stlen);
+ len -= stlen;
+ tail += stlen;
+ if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
+ tail = portp->tx.buf;
+ if (len > 0) {
+ outsb((ioaddr + EREG_DATA), tail, len);
+ tail += len;
+ }
+ portp->tx.tail = tail;
+ }
+
+stl_txalldone:
+ outb((EOSRR + portp->uartaddr), ioaddr);
+ outb(0, (ioaddr + EREG_DATA));
+}
+
+/*****************************************************************************/
+
+/*
+ * Receive character interrupt handler. Determine if we have good chars
+ * or bad chars and then process appropriately. Good chars are easy
+ * just shove the lot into the RX buffer and set all status byte to 0.
+ * If a bad RX char then process as required. This routine needs to be
+ * fast! In practice it is possible that we get an interrupt on a port
+ * that is closed. This can happen on hangups - since they completely
+ * shutdown a port not in user context. Need to handle this case.
+ */
+
+static inline void stl_rxisr(stlpanel_t *panelp, int ioaddr)
+{
+ stlport_t *portp;
+ struct tty_struct *tty;
+ unsigned int ioack, len, buflen;
+ unsigned char status;
+ char ch;
+ static char unwanted[CD1400_RXFIFOSIZE];
+
+#if DEBUG
+ printk("stl_rxisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr);
+#endif
+
+ ioack = inb(ioaddr + EREG_RXACK);
+ if ((ioack & panelp->ackmask) != 0) {
+ printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
+ return;
+ }
+ portp = panelp->ports[(ioack >> 3)];
+ tty = portp->tty;
+
+ if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
+ outb((RDCR + portp->uartaddr), ioaddr);
+ len = inb(ioaddr + EREG_DATA);
+ if ((tty == (struct tty_struct *) NULL) || (tty->flip.char_buf_ptr == (char *) NULL) ||
+ ((buflen = TTY_FLIPBUF_SIZE - tty->flip.count) == 0)) {
+ outb((RDSR + portp->uartaddr), ioaddr);
+ insb((ioaddr + EREG_DATA), &unwanted[0], len);
+ } 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);
+ }
+ }
+ } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) {
+ outb((RDSR + portp->uartaddr), ioaddr);
+ status = inb(ioaddr + EREG_DATA);
+ ch = inb(ioaddr + EREG_DATA);
+ if ((tty != (struct tty_struct *) NULL) && ((portp->rxignoremsk & status) == 0)) {
+ if (portp->rxmarkmsk & status) {
+ if (status & ST_BREAK) {
+ status = TTY_BREAK;
+#ifndef MODULE
+ if (portp->flags & ASYNC_SAK)
+ do_SAK(tty);
+#endif
+ } else if (status & ST_PARITY) {
+ status = TTY_PARITY;
+ } else if (status & ST_FRAMING) {
+ status = TTY_FRAME;
+ } else if(status & ST_OVERRUN) {
+ status = TTY_OVERRUN;
+ } else {
+ status = 0;
+ }
+ } else {
+ status = 0;
+ }
+ if (tty->flip.char_buf_ptr != (char *) NULL) {
+ if (tty->flip.count < TTY_FLIPBUF_SIZE) {
+ *tty->flip.flag_buf_ptr++ = status;
+ *tty->flip.char_buf_ptr++ = ch;
+ tty->flip.count++;
+ }
+ tty_schedule_flip(tty);
+ }
+ }
+ } else {
+ printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
+ return;
+ }
+
+ outb((EOSRR + portp->uartaddr), ioaddr);
+ outb(0, (ioaddr + EREG_DATA));
+}
+
+/*****************************************************************************/
+
+/*
+ * Modem interrupt handler. The is called when the modem signal line
+ * (DCD) has changed state. Leave most of the work to the off-level
+ * processing routine.
+ */
+
+static inline void stl_mdmisr(stlpanel_t *panelp, int ioaddr)
+{
+ stlport_t *portp;
+ unsigned int ioack;
+ unsigned char misr;
+
+#if DEBUG
+ printk("stl_mdmisr(panelp=%x)\n", (int) panelp);
+#endif
+
+ ioack = inb(ioaddr + EREG_MDACK);
+ if (((ioack & panelp->ackmask) != 0) || ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) {
+ printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack);
+ return;
+ }
+ portp = panelp->ports[(ioack >> 3)];
+
+ outb((MISR + portp->uartaddr), ioaddr);
+ misr = inb(ioaddr + EREG_DATA);
+ if (misr & MISR_DCD) {
+ set_bit(ASYI_DCDCHANGE, &portp->istate);
+ queue_task_irq_off(&portp->tqueue, &tq_scheduler);
+ }
+
+ outb((EOSRR + portp->uartaddr), ioaddr);
+ outb(0, (ioaddr + EREG_DATA));
+}
+
+/*****************************************************************************/
+
+/*
+ * Interrupt handler for EIO and ECH boards. This code ain't all that
+ * pretty, but the idea is to make it as fast as possible. This code is
+ * well suited to be assemblerized :-) We don't use the general purpose
+ * register access functions here, for speed we will go strait to the
+ * io region.
+ */
+
+static void stl_intr(int irq, struct pt_regs *regs)
+{
+ stlbrd_t *brdp;
+ stlpanel_t *panelp;
+ unsigned char svrtype;
+ int i, panelnr, iobase;
+
+#if DEBUG
+ printk("stl_intr(irq=%d,regs=%x)\n", irq, (int) regs);
+#endif
+
+ panelp = (stlpanel_t *) NULL;
+ for (i = 0; (i < stl_nrbrds); ) {
+ if ((brdp = stl_brds[i]) == (stlbrd_t *) NULL) {
+ i++;
+ continue;
+ }
+ if (brdp->state == 0) {
+ i++;
+ continue;
+ }
+/*
+ * The following section of code handles the subtle differences
+ * between board types. It is sort of similar, but different
+ * enough to handle each separately.
+ */
+ if (brdp->brdtype == BRD_EASYIO) {
+ if ((inb(brdp->iostatus) & EIO_INTRPEND) == 0) {
+ i++;
+ continue;
+ }
+ panelp = brdp->panels[0];
+ iobase = panelp->iobase;
+ outb(SVRR, iobase);
+ svrtype = inb(iobase + EREG_DATA);
+ if (brdp->nrports > 4) {
+ outb((SVRR + 0x80), iobase);
+ svrtype |= inb(iobase + EREG_DATA);
+ }
+ } else if (brdp->brdtype == BRD_ECH) {
+ if ((inb(brdp->iostatus) & ECH_INTRPEND) == 0) {
+ i++;
+ continue;
+ }
+ outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
+ for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) {
+ panelp = brdp->panels[panelnr];
+ iobase = panelp->iobase;
+ if (inb(iobase + ECH_PNLSTATUS) & ECH_PNLINTRPEND)
+ break;
+ if (panelp->nrports > 8) {
+ iobase += 0x8;
+ if (inb(iobase + ECH_PNLSTATUS) & ECH_PNLINTRPEND)
+ break;
+ }
+ }
+ if (panelnr >= brdp->nrpanels) {
+ i++;
+ continue;
+ }
+ outb(SVRR, iobase);
+ svrtype = inb(iobase + EREG_DATA);
+ outb((SVRR + 0x80), iobase);
+ svrtype |= inb(iobase + EREG_DATA);
+ } else if (brdp->brdtype == BRD_ECHPCI) {
+ iobase = brdp->ioaddr2;
+ for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) {
+ panelp = brdp->panels[panelnr];
+ outb(panelp->pagenr, brdp->ioctrl);
+ if (inb(iobase + ECH_PNLSTATUS) & ECH_PNLINTRPEND)
+ break;
+ if (panelp->nrports > 8) {
+ outb((panelp->pagenr + 1), brdp->ioctrl);
+ if (inb(iobase + ECH_PNLSTATUS) & ECH_PNLINTRPEND)
+ break;
+ }
+ }
+ if (panelnr >= brdp->nrpanels) {
+ i++;
+ continue;
+ }
+ outb(SVRR, iobase);
+ svrtype = inb(iobase + EREG_DATA);
+ outb((SVRR + 0x80), iobase);
+ svrtype |= inb(iobase + EREG_DATA);
+ } else if (brdp->brdtype == BRD_ECHMC) {
+ if ((inb(brdp->iostatus) & ECH_INTRPEND) == 0) {
+ i++;
+ continue;
+ }
+ for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) {
+ panelp = brdp->panels[panelnr];
+ iobase = panelp->iobase;
+ if (inb(iobase + ECH_PNLSTATUS) & ECH_PNLINTRPEND)
+ break;
+ if (panelp->nrports > 8) {
+ iobase += 0x8;
+ if (inb(iobase + ECH_PNLSTATUS) & ECH_PNLINTRPEND)
+ break;
+ }
+ }
+ if (panelnr >= brdp->nrpanels) {
+ i++;
+ continue;
+ }
+ outb(SVRR, iobase);
+ svrtype = inb(iobase + EREG_DATA);
+ outb((SVRR + 0x80), iobase);
+ svrtype |= inb(iobase + EREG_DATA);
+ } else {
+ printk("STALLION: unknown board type=%x\n", brdp->brdtype);
+ i++;
+ continue;
+ }
+
+/*
+ * We have determined what type of service is required for a
+ * port. From here on in the service of a port is the same no
+ * matter what the board type...
+ */
+ if (svrtype & SVRR_RX)
+ stl_rxisr(panelp, iobase);
+ if (svrtype & SVRR_TX)
+ stl_txisr(panelp, iobase);
+ if (svrtype & SVRR_MDM)
+ stl_mdmisr(panelp, iobase);
+
+ if (brdp->brdtype == BRD_ECH)
+ outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
+ }
+}
+
+/*****************************************************************************/
+
+/*
+ * Service an off-level request for some channel.
+ */
+
+static void stl_offintr(void *private)
+{
+ stlport_t *portp;
+ struct tty_struct *tty;
+ unsigned int oldsigs;
+
+ portp = private;
+#if DEBUG
+ printk("stl_offintr(portp=%x)\n", (int) portp);
+#endif
+
+ if (portp == (stlport_t *) NULL)
+ return;
+ tty = portp->tty;
+ if (tty == (struct tty_struct *) NULL)
+ return;
+
+ if (test_bit(ASYI_TXLOW, &portp->istate)) {
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
+ (tty->ldisc.write_wakeup)(tty);
+ wake_up_interruptible(&tty->write_wait);
+ }
+ if (test_bit(ASYI_DCDCHANGE, &portp->istate)) {
+ clear_bit(ASYI_DCDCHANGE, &portp->istate);
+ oldsigs = portp->sigs;
+ 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_CALLOUT_ACTIVE) &&
+ (portp->flags & ASYNC_CALLOUT_NOHUP))) {
+ tty_hangup(tty);
+ }
+ }
+ }
+}
+
+/*****************************************************************************/
+
+/*
+ * Wait for the command register to be ready. We will poll this,
+ * since it won't usually take too long to be ready.
+ */
+
+static void stl_ccrwait(stlport_t *portp)
+{
+ int i;
+
+ for (i = 0; (i < CCR_MAXWAIT); i++) {
+ if (stl_getreg(portp, CCR) == 0) {
+ return;
+ }
+ }
+
+ printk("STALLION: cd1400 device not responding, port=%d panel=%d brd=%d\n", portp->portnr, portp->panelnr, portp->brdnr);
+}
+
+/*****************************************************************************/
+
+/*
+ * Set up the cd1400 registers for a port based on the termios port
+ * settings.
+ */
+
+static void stl_setport(stlport_t *portp, struct termios *tiosp)
+{
+ stlbrd_t *brdp;
+ unsigned long flags;
+ unsigned int clkdiv, baudrate;
+ unsigned char cor1, cor2, cor3;
+ unsigned char cor4, cor5, ccr;
+ unsigned char srer, sreron, sreroff;
+ unsigned char mcor1, mcor2, rtpr;
+ unsigned char clk, div;
+
+ cor1 = 0;
+ cor2 = 0;
+ cor3 = 0;
+ cor4 = 0;
+ cor5 = 0;
+ ccr = 0;
+ rtpr = 0;
+ clk = 0;
+ div = 0;
+ mcor1 = 0;
+ mcor2 = 0;
+ sreron = 0;
+ sreroff = 0;
+
+ brdp = stl_brds[portp->brdnr];
+ if (brdp == (stlbrd_t *) NULL)
+ return;
+
+/*
+ * Set up the RX char ignore mask with those RX error types we
+ * can ignore. We can get the cd1400 to help us out a little here,
+ * it will ignore parity errors and breaks for us.
+ */
+ portp->rxignoremsk = 0;
+ if (tiosp->c_iflag & IGNPAR) {
+ portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN);
+ cor1 |= COR1_PARIGNORE;
+ }
+ if (tiosp->c_iflag & IGNBRK) {
+ portp->rxignoremsk |= ST_BREAK;
+ cor4 |= COR4_IGNBRK;
+ }
+
+ portp->rxmarkmsk = ST_OVERRUN;
+ if (tiosp->c_iflag & (INPCK | PARMRK))
+ portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING);
+ if (tiosp->c_iflag & BRKINT)
+ portp->rxmarkmsk |= ST_BREAK;
+
+/*
+ * Go through the char size, parity and stop bits and set all the
+ * option register appropriately.
+ */
+ switch (tiosp->c_cflag & CSIZE) {
+ case CS5:
+ cor1 |= COR1_CHL5;
+ break;
+ case CS6:
+ cor1 |= COR1_CHL6;
+ break;
+ case CS7:
+ cor1 |= COR1_CHL7;
+ break;
+ default:
+ cor1 |= COR1_CHL8;
+ break;
+ }
+
+ if (tiosp->c_cflag & CSTOPB)
+ cor1 |= COR1_STOP2;
+ else
+ cor1 |= COR1_STOP1;
+
+ if (tiosp->c_cflag & PARENB) {
+ if (tiosp->c_cflag & PARODD)
+ cor1 |= (COR1_PARENB | COR1_PARODD);
+ else
+ cor1 |= (COR1_PARENB | COR1_PAREVEN);
+ } else {
+ cor1 |= COR1_PARNONE;
+ }
+
+/*
+ * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
+ * space for hardware flow control and the like. This should be set to
+ * VMIN. Also here we will set the RX data timeout to 10ms - this should
+ * really be based on VTIME.
+ */
+ cor3 |= FIFO_RXTHRESHOLD;
+ rtpr = 2;
+
+/*
+ * Calculate the baud rate timers. For now we will just assume that
+ * the input and output baud are the same. Could have used a baud
+ * table here, but this way we can generate virtually any baud rate
+ * we like!
+ */
+ baudrate = tiosp->c_cflag & CBAUD;
+ if (baudrate & CBAUDEX) {
+ baudrate &= ~CBAUDEX;
+ if ((baudrate < 1) || (baudrate > 2))
+ tiosp->c_cflag &= ~CBAUDEX;
+ else
+ baudrate += 15;
+ }
+ baudrate = stl_baudrates[baudrate];
+ if ((tiosp->c_cflag & CBAUD) == B38400) {
+ if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+ baudrate = 57600;
+ else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+ baudrate = 115200;
+ else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
+ baudrate = (portp->baud_base / portp->custom_divisor);
+ }
+ if (baudrate > STL_MAXBAUD)
+ baudrate = STL_MAXBAUD;
+
+ if (baudrate > 0) {
+ for (clk = 0; (clk < CD1400_NUMCLKS); clk++) {
+ clkdiv = ((CD1400_CLKHZ / 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;
+ }
+
+/*
+ * Setup cd1400 enhanced modes if we can. In particular we want to
+ * handle as much of the flow control as possbile automatically. As
+ * well as saving a few CPU cycles it will also greatly improve flow
+ * control reliablilty.
+ */
+ if (tiosp->c_iflag & IXON) {
+ cor2 |= COR2_TXIBE;
+ cor3 |= (COR3_FCT | COR3_SCD12);
+ if (tiosp->c_iflag & IXANY)
+ cor2 |= COR2_IXM;
+ }
+
+ if (tiosp->c_cflag & CRTSCTS) {
+ cor2 |= COR2_CTSAE;
+ mcor1 |= FIFO_RTSTHRESHOLD;
+ }
+
+/*
+ * All register cd1400 register values calculated so go through and set
+ * them all up.
+ */
+
+#if DEBUG
+ printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", portp->portnr, portp->panelnr, portp->brdnr);
+ printk(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n", cor1, cor2, cor3, cor4, cor5);
+ printk(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n", mcor1, mcor2, rtpr, sreron, sreroff);
+ printk(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div);
+ printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n", tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
+#endif
+
+ save_flags(flags);
+ cli();
+ BRDENABLE(portp->brdnr, portp->pagenr);
+ stl_setreg(portp, CAR, (portp->portnr & 0x3));
+ srer = stl_getreg(portp, SRER);
+ stl_setreg(portp, SRER, 0);
+ if (stl_updatereg(portp, COR1, cor1))
+ ccr = 1;
+ if (stl_updatereg(portp, COR2, cor2))
+ ccr = 1;
+ if (stl_updatereg(portp, COR3, cor3))
+ ccr = 1;
+ if (ccr) {
+ stl_ccrwait(portp);
+ stl_setreg(portp, CCR, CCR_CORCHANGE);
+ }
+ stl_setreg(portp, COR4, cor4);
+ stl_setreg(portp, COR5, cor5);
+ stl_setreg(portp, MCOR1, mcor1);
+ stl_setreg(portp, MCOR2, mcor2);
+ if (baudrate > 0) {
+ stl_setreg(portp, TCOR, clk);
+ stl_setreg(portp, TBPR, div);
+ stl_setreg(portp, RCOR, clk);
+ stl_setreg(portp, RBPR, div);
+ }
+ stl_setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
+ stl_setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
+ stl_setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
+ stl_setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
+ stl_setreg(portp, RTPR, rtpr);
+ mcor1 = stl_getreg(portp, MSVR1);
+ if (mcor1 & MSVR1_DCD)
+ portp->sigs |= TIOCM_CD;
+ else
+ portp->sigs &= ~TIOCM_CD;
+ stl_setreg(portp, SRER, ((srer & ~sreroff) | sreron));
+ BRDDISABLE(portp->brdnr);
+ restore_flags(flags);
+}
+
+/*****************************************************************************/
+
+/*
+ * Set the state of the DTR and RTS signals.
+ */
+
+static void stl_setsignals(stlport_t *portp, int dtr, int rts)
+{
+ unsigned char msvr1, msvr2;
+ unsigned long flags;
+
+#if DEBUG
+ printk("stl_setsignals(portp=%x,dtr=%d,rts=%d)\n", (int) portp, dtr, rts);
+#endif
+
+ msvr1 = 0;
+ msvr2 = 0;
+ if (dtr > 0)
+ msvr1 = MSVR1_DTR;
+ if (rts > 0)
+ msvr2 = MSVR2_RTS;
+
+ save_flags(flags);
+ cli();
+ BRDENABLE(portp->brdnr, portp->pagenr);
+ stl_setreg(portp, CAR, (portp->portnr & 0x03));
+ if (rts >= 0)
+ stl_setreg(portp, MSVR2, msvr2);
+ if (dtr >= 0)
+ stl_setreg(portp, MSVR1, msvr1);
+ BRDDISABLE(portp->brdnr);
+ restore_flags(flags);
+}
+
+/*****************************************************************************/
+
+/*
+ * Get the state of the signals.
+ */
+
+static void stl_getsignals(stlport_t *portp)
+{
+ unsigned char msvr1, msvr2;
+ unsigned long flags;
+
+#if DEBUG
+ printk("stl_getsignals(portp=%x)\n", (int) portp);
+#endif
+
+ save_flags(flags);
+ cli();
+ BRDENABLE(portp->brdnr, portp->pagenr);
+ stl_setreg(portp, CAR, (portp->portnr & 0x03));
+ msvr1 = stl_getreg(portp, MSVR1);
+ msvr2 = stl_getreg(portp, MSVR2);
+ BRDDISABLE(portp->brdnr);
+ portp->sigs = 0;
+ portp->sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
+ portp->sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
+ portp->sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
+ portp->sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
+ portp->sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
+ portp->sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
+ restore_flags(flags);
+}
+
+/*****************************************************************************/
+
+/*
+ * Enable/Disable the Transmitter and/or Reciever.
+ */
+
+static void stl_enablerxtx(stlport_t *portp, int rx, int tx)
+{
+ unsigned char ccr;
+ unsigned long flags;
+
+#if DEBUG
+ printk("stl_enablerxtx(portp=%x,rx=%d,tx=%d)\n", (int) portp, rx, tx);
+#endif
+ ccr = 0;
+
+ if (tx == 0)
+ ccr |= CCR_TXDISABLE;
+ else if (tx > 0)
+ ccr |= CCR_TXENABLE;
+ if (rx == 0)
+ ccr |= CCR_RXDISABLE;
+ else if (rx > 0)
+ ccr |= CCR_RXENABLE;
+
+ save_flags(flags);
+ cli();
+ BRDENABLE(portp->brdnr, portp->pagenr);
+ stl_setreg(portp, CAR, (portp->portnr & 0x03));
+ stl_ccrwait(portp);
+ stl_setreg(portp, CCR, ccr);
+ stl_ccrwait(portp);
+ BRDDISABLE(portp->brdnr);
+ restore_flags(flags);
+}
+
+/*****************************************************************************/
+
+/*
+ * Start/stop the Transmitter and/or Reciever.
+ */
+
+static void stl_startrxtx(stlport_t *portp, int rx, int tx)
+{
+ unsigned char sreron, sreroff;
+ unsigned long flags;
+
+#if DEBUG
+ printk("stl_startrxtx(portp=%x,rx=%d,tx=%d)\n", (int) portp, rx, tx);
+#endif
+
+ sreron = 0;
+ sreroff = 0;
+ if (tx == 0)
+ sreroff |= (SRER_TXDATA | SRER_TXEMPTY);
+ else if (tx == 1)
+ sreron |= SRER_TXDATA;
+ else if (tx >= 2)
+ sreron |= SRER_TXEMPTY;
+ if (rx == 0)
+ sreroff |= SRER_RXDATA;
+ else if (rx > 0)
+ sreron |= SRER_RXDATA;
+
+ save_flags(flags);
+ cli();
+ BRDENABLE(portp->brdnr, portp->pagenr);
+ stl_setreg(portp, CAR, (portp->portnr & 0x03));
+ stl_setreg(portp, SRER, ((stl_getreg(portp, SRER) & ~sreroff) | sreron));
+ BRDDISABLE(portp->brdnr);
+ if (tx > 0)
+ set_bit(ASYI_TXBUSY, &portp->istate);
+ restore_flags(flags);
+}
+
+/*****************************************************************************/
+
+/*
+ * Disable all interrupts from this port.
+ */
+
+static void stl_disableintrs(stlport_t *portp)
+{
+ unsigned long flags;
+
+#if DEBUG
+ printk("stl_disableintrs(portp=%x)\n", (int) portp);
+#endif
+ save_flags(flags);
+ cli();
+ BRDENABLE(portp->brdnr, portp->pagenr);
+ stl_setreg(portp, CAR, (portp->portnr & 0x03));
+ stl_setreg(portp, SRER, 0);
+ BRDDISABLE(portp->brdnr);
+ restore_flags(flags);
+}
+
+/*****************************************************************************/
+
+static void stl_sendbreak(stlport_t *portp, long len)
+{
+ unsigned long flags;
+
+#if DEBUG
+ printk("stl_sendbreak(portp=%x,len=%d)\n", (int) portp, (int) len);
+#endif
+
+ save_flags(flags);
+ cli();
+ BRDENABLE(portp->brdnr, portp->pagenr);
+ stl_setreg(portp, CAR, (portp->portnr & 0x03));
+ stl_setreg(portp, COR2, (stl_getreg(portp, COR2) | COR2_ETC));
+ stl_setreg(portp, SRER, ((stl_getreg(portp, SRER) & ~SRER_TXDATA) | SRER_TXEMPTY));
+ BRDDISABLE(portp->brdnr);
+ len = len / 5;
+ portp->brklen = (len > 255) ? 255 : len;
+ restore_flags(flags);
+}
+
+/*****************************************************************************/
+
+/*
+ * Map in interrupt vector to this driver. Check that we don't
+ * already have this vector mapped, we might be sharing this
+ * interrupt accross multiple boards.
+ */
+
+static int stl_mapirq(int irq)
+{
+ int rc, i;
+
+#if DEBUG
+ printk("stl_mapirq(irq=%d)\n", irq);
+#endif
+
+ rc = 0;
+ for (i = 0; (i < stl_numintrs); i++) {
+ if (stl_gotintrs[i] == irq)
+ break;
+ }
+ if (i >= stl_numintrs) {
+ if (request_irq(irq, stl_intr, SA_INTERRUPT, stl_drvname) != 0) {
+ printk("STALLION: failed to register interrupt routine for irq=%d\n", irq);
+ rc = -ENODEV;
+ } else {
+ stl_gotintrs[stl_numintrs++] = irq;
+ }
+ }
+ return(rc);
+}
+
+/*****************************************************************************/
+
+/*
+ * Try and find and initialize all the ports on a panel. We don't care
+ * what sort of board these ports are on - since the port io registers
+ * are almost identical when dealing with ports.
+ */
+
+static int stl_initports(stlbrd_t *brdp, stlpanel_t *panelp)
+{
+ stlport_t *portp;
+ unsigned int chipmask;
+ unsigned int gfrcr;
+ int nrchips, uartaddr, ioaddr;
+ int i, j;
+
+#if DEBUG
+ printk("stl_initports(panelp=%x)\n", (int) panelp);
+#endif
+
+ BRDENABLE(panelp->brdnr, panelp->pagenr);
+
+/*
+ * Check that each chip is present and started up OK.
+ */
+ chipmask = 0;
+ nrchips = panelp->nrports / CD1400_PORTS;
+ for (i = 0; (i < nrchips); i++) {
+ if (brdp->brdtype == BRD_ECHPCI) {
+ outb((panelp->pagenr + (i >> 1)), brdp->ioctrl);
+ ioaddr = panelp->iobase;
+ } else {
+ ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1));
+ }
+ uartaddr = (i & 0x01) ? 0x080 : 0;
+ outb((GFRCR + uartaddr), ioaddr);
+ outb(0, (ioaddr + EREG_DATA));
+ outb((CCR + uartaddr), ioaddr);
+ outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
+ outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
+ outb((GFRCR + uartaddr), ioaddr);
+ for (j = 0; (j < CCR_MAXWAIT); j++) {
+ if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0)
+ break;
+ }
+ if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) {
+ printk("STALLION: cd1400 not responding, brd=%d panel=%d chip=%d\n", panelp->brdnr, panelp->panelnr, i);
+ continue;
+ }
+ chipmask |= (0x1 << i);
+ outb((PPR + uartaddr), ioaddr);
+ outb(PPR_SCALAR, (ioaddr + EREG_DATA));
+ }
+
+/*
+ * All cd1400's are initialized (if found!). Now go through and setup
+ * each ports data structures. Also init the LIVR register of cd1400
+ * for each port.
+ */
+ ioaddr = panelp->iobase;
+ for (i = 0; (i < panelp->nrports); i++) {
+ if (brdp->brdtype == BRD_ECHPCI) {
+ outb((panelp->pagenr + (i >> 3)), brdp->ioctrl);
+ ioaddr = panelp->iobase;
+ } else {
+ ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 3));
+ }
+ if ((chipmask & (0x1 << (i / 4))) == 0)
+ continue;
+ portp = (stlport_t *) stl_memalloc(sizeof(stlport_t));
+ if (portp == (stlport_t *) NULL) {
+ printk("STALLION: failed to allocate memory (size=%d)\n", sizeof(stlport_t));
+ break;
+ }
+ memset(portp, 0, sizeof(stlport_t));
+ portp->portnr = i;
+ portp->brdnr = panelp->brdnr;
+ portp->panelnr = panelp->panelnr;
+ portp->ioaddr = ioaddr;
+ portp->uartaddr = (i & 0x04) << 5;
+ portp->pagenr = panelp->pagenr + (i >> 3);
+ portp->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;
+ stl_setreg(portp, CAR, (i & 0x03));
+ stl_setreg(portp, LIVR, (i << 3));
+ panelp->ports[i] = portp;
+ }
+
+ BRDDISABLE(panelp->brdnr);
+ return(0);
+}
+
+/*****************************************************************************/
+
+/*
+ * Try to find and initialize an EasyIO board.
+ */
+
+static int stl_initeio(stlbrd_t *brdp)
+{
+ stlpanel_t *panelp;
+ unsigned int status;
+ int rc;
+
+#if DEBUG
+ printk("stl_initeio(brdp=%x)\n", (int) brdp);
+#endif
+
+ brdp->ioctrl = brdp->ioaddr1 + 1;
+ brdp->iostatus = brdp->ioaddr1 + 2;
+
+ status = inb(brdp->iostatus);
+ switch (status & EIO_IDBITMASK) {
+ case EIO_8PORTRS:
+ case EIO_8PORTM:
+ case EIO_8PORTDI:
+ brdp->nrports = 8;
+ break;
+ case EIO_4PORTRS:
+ brdp->nrports = 4;
+ break;
+ default:
+ return(-ENODEV);
+ }
+
+ request_region(brdp->ioaddr1, 8, "serial(EIO)");
+
+/*
+ * Check that the supplied IRQ is good and then use it to setup the
+ * programmable interrupt bits on EIO board. Also set the edge/level
+ * triggered interrupt bit.
+ */
+ if ((brdp->irq < 0) || (brdp->irq > 15) ||
+ (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
+ printk("STALLION: invalid irq=%d for brd=%d\n", brdp->irq, brdp->brdnr);
+ return(-EINVAL);
+ }
+ outb((stl_vecmap[brdp->irq] | ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)), brdp->ioctrl);
+
+ panelp = (stlpanel_t *) stl_memalloc(sizeof(stlpanel_t));
+ if (panelp == (stlpanel_t *) NULL) {
+ printk("STALLION: failed to allocate memory (size=%d)\n", sizeof(stlpanel_t));
+ return(-ENOMEM);
+ }
+ memset(panelp, 0, sizeof(stlpanel_t));
+
+ panelp->brdnr = brdp->brdnr;
+ panelp->panelnr = 0;
+ panelp->nrports = brdp->nrports;
+ panelp->iobase = brdp->ioaddr1;
+ brdp->panels[0] = panelp;
+ brdp->nrpanels = 1;
+ brdp->state |= BRD_FOUND;
+ rc = stl_mapirq(brdp->irq);
+ return(rc);
+}
+
+/*****************************************************************************/
+
+/*
+ * Try to find an ECH board and initialize it. This code is capable of
+ * dealing with all types of ECH board.
+ */
+
+static int stl_initech(stlbrd_t *brdp)
+{
+ stlpanel_t *panelp;
+ unsigned int status, nxtid;
+ int panelnr, ioaddr, i;
+
+#if DEBUG
+ printk("stl_initech(brdp=%x)\n", (int) brdp);
+#endif
+
+/*
+ * Set up the initial board register contents for boards. This varys a
+ * bit between the different board types. So we need to handle each
+ * separately. Also do a check that the supplied IRQ is good.
+ */
+ if (brdp->brdtype == BRD_ECH) {
+ brdp->ioctrl = brdp->ioaddr1 + 1;
+ brdp->iostatus = brdp->ioaddr1 + 1;
+ status = inb(brdp->iostatus);
+ if ((status & ECH_IDBITMASK) != ECH_ID)
+ return(-ENODEV);
+
+ if ((brdp->irq < 0) || (brdp->irq > 15) ||
+ (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
+ printk("STALLION: invalid irq=%d for brd=%d\n", brdp->irq, brdp->brdnr);
+ return(-EINVAL);
+ }
+ status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1);
+ status |= (stl_vecmap[brdp->irq] << 1);
+ outb((status | ECH_BRDRESET), brdp->ioaddr1);
+ brdp->ioctrlval = ECH_INTENABLE | ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE);
+ outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
+ outb(status, brdp->ioaddr1);
+
+ request_region(brdp->ioaddr1, 2, "serial(EC8/32)");
+ request_region(brdp->ioaddr2, 32, "serial(EC8/32-secondary)");
+ } else if (brdp->brdtype == BRD_ECHMC) {
+ brdp->ioctrl = brdp->ioaddr1 + 0x20;
+ brdp->iostatus = brdp->ioctrl;
+ status = inb(brdp->iostatus);
+ if ((status & ECH_IDBITMASK) != ECH_ID)
+ return(-ENODEV);
+
+ if ((brdp->irq < 0) || (brdp->irq > 15) ||
+ (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
+ printk("STALLION: invalid irq=%d for brd=%d\n", brdp->irq, brdp->brdnr);
+ return(-EINVAL);
+ }
+ outb(ECHMC_BRDRESET, brdp->ioctrl);
+ outb(ECHMC_INTENABLE, brdp->ioctrl);
+
+ request_region(brdp->ioaddr1, 64, "serial(EC8/32-MC)");
+ } else if (brdp->brdtype == BRD_ECHPCI) {
+ brdp->ioctrl = brdp->ioaddr1 + 2;
+ request_region(brdp->ioaddr1, 4, "serial(EC8/32-PCI)");
+ request_region(brdp->ioaddr2, 8, "serial(EC8/32-PCI-secondary)");
+ }
+
+/*
+ * Scan through the secondary io address space looking for panels.
+ * As we find'em allocate and initialize panel structures for each.
+ */
+ ioaddr = brdp->ioaddr2;
+ panelnr = 0;
+ nxtid = 0;
+
+ for (i = 0; (i < STL_MAXPANELS); i++) {
+ if (brdp->brdtype == BRD_ECHPCI) {
+ outb(nxtid, brdp->ioctrl);
+ ioaddr = brdp->ioaddr2;
+ }
+ status = inb(ioaddr + ECH_PNLSTATUS);
+ if ((status & ECH_PNLIDMASK) != nxtid)
+ break;
+ panelp = (stlpanel_t *) stl_memalloc(sizeof(stlpanel_t));
+ if (panelp == (stlpanel_t *) NULL) {
+ printk("STALLION: failed to allocate memory (size=%d)\n", sizeof(stlpanel_t));
+ break;
+ }
+ memset(panelp, 0, sizeof(stlpanel_t));
+ panelp->brdnr = brdp->brdnr;
+ panelp->panelnr = panelnr;
+ panelp->iobase = ioaddr;
+ panelp->pagenr = nxtid;
+ if (status & ECH_PNL16PORT) {
+ if ((brdp->nrports + 16) > 32)
+ break;
+ panelp->nrports = 16;
+ panelp->ackmask = 0x80;
+ brdp->nrports += 16;
+ ioaddr += (EREG_BANKSIZE * 2);
+ nxtid += 2;
+ } else {
+ panelp->nrports = 8;
+ panelp->ackmask = 0xc0;
+ brdp->nrports += 8;
+ ioaddr += EREG_BANKSIZE;
+ nxtid++;
+ }
+ brdp->panels[panelnr++] = panelp;
+ brdp->nrpanels++;
+ if (ioaddr >= (brdp->ioaddr2 + 0x20))
+ break;
+ }
+
+ if (brdp->brdtype == BRD_ECH)
+ outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
+
+ brdp->state |= BRD_FOUND;
+ i = stl_mapirq(brdp->irq);
+ return(i);
+}
+
+/*****************************************************************************/
+
+/*
+ * Initialize and configure the specified board.
+ * Scan through all the boards in the configuration and see what we
+ * can find. Handle EIO and the ECH boards a little differently here
+ * since the initial search and setup is too different.
+ */
+
+static int stl_brdinit(stlbrd_t *brdp)
+{
+ int i;
+
+#if DEBUG
+ printk("stl_brdinit(brdp=%x)\n", (int) brdp);
+#endif
+
+ switch (brdp->brdtype) {
+ case BRD_EASYIO:
+ stl_initeio(brdp);
+ break;
+ case BRD_ECH:
+ case BRD_ECHMC:
+ case BRD_ECHPCI:
+ stl_initech(brdp);
+ break;
+ default:
+ printk("STALLION: unit=%d is unknown board type=%d\n", brdp->brdnr, brdp->brdtype);
+ return(ENODEV);
+ }
+
+ stl_brds[brdp->brdnr] = brdp;
+ if ((brdp->state & BRD_FOUND) == 0) {
+ printk("STALLION: %s board not found, unit=%d io=%x irq=%d\n", stl_brdnames[brdp->brdtype], brdp->brdnr, brdp->ioaddr1, brdp->irq);
+ return(ENODEV);
+ }
+
+ for (i = 0; (i < STL_MAXPANELS); i++)
+ if (brdp->panels[i] != (stlpanel_t *) NULL)
+ stl_initports(brdp, brdp->panels[i]);
+
+ printk("STALLION: %s found, unit=%d io=%x irq=%d nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype], brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels, brdp->nrports);
+ return(0);
+}
+
+/*****************************************************************************/
+
+/*
+ * Find any ECH-PCI boards that might be installed. Initialize each
+ * one as it is found.
+ */
+
+#ifdef CONFIG_PCI
+
+static int stl_findpcibrds()
+{
+ stlbrd_t *brdp;
+ unsigned char busnr, devnr, irq;
+ unsigned short class;
+ unsigned int ioaddr;
+ int i, rc;
+
+#if DEBUG
+ printk("stl_findpcibrds()\n");
+#endif
+
+ if (pcibios_present()) {
+ for (i = 0; (i < STL_MAXBRDS); i++) {
+ if (pcibios_find_device(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410, i, &busnr, &devnr))
+ break;
+
+/*
+ * Found a device on the PCI bus that has our vendor and
+ * device ID. Need to check now that it is really us.
+ */
+ if ((rc = pcibios_read_config_word(busnr, devnr, PCI_CLASS_DEVICE, &class))) {
+ printk("STALLION: failed to read class type from PCI board, errno=%x\n", rc);
+ continue;
+ }
+ if (class == PCI_CLASS_STORAGE_IDE)
+ continue;
+
+ if (stl_nrbrds >= STL_MAXBRDS) {
+ printk("STALLION: too many boards found, maximum supported %d\n", STL_MAXBRDS);
+ break;
+ }
+
+/*
+ * We have a Stallion board. Allocate a board structure
+ * and initialize it. Read its IO and IRQ resources
+ * from conf space.
+ */
+ brdp = (stlbrd_t *) stl_memalloc(sizeof(stlbrd_t));
+ if (brdp == (stlbrd_t *) NULL) {
+ printk("STALLION: failed to allocate memory (size=%d)\n", sizeof(stlbrd_t));
+ return(-ENOMEM);
+ }
+ memset(brdp, 0, sizeof(stlbrd_t));
+ brdp->brdnr = stl_nrbrds++;
+ brdp->brdtype = BRD_ECHPCI;
+
+ if ((rc = pcibios_read_config_dword(busnr, devnr, PCI_BASE_ADDRESS_0, &ioaddr))) {
+ printk("STALLION: failed to read BAR register from PCI board, errno=%x\n", rc);
+ continue;
+ }
+ brdp->ioaddr2 = (ioaddr & PCI_BASE_ADDRESS_IO_MASK);
+
+ if ((rc = pcibios_read_config_dword(busnr, devnr, PCI_BASE_ADDRESS_1, &ioaddr))) {
+ printk("STALLION: failed to read BAR register from PCI board, errno=%x\n", rc);
+ continue;
+ }
+ brdp->ioaddr1 = (ioaddr & PCI_BASE_ADDRESS_IO_MASK);
+#if DEBUG
+ printk("%s(%d): BAR0=%x BAR1=%x\n", __FILE__, __LINE__, brdp->ioaddr2, brdp->ioaddr1);
+#endif
+
+ if ((rc = pcibios_read_config_byte(busnr, devnr, PCI_INTERRUPT_LINE, &irq))) {
+ printk("STALLION: failed to read BAR register from PCI board, errno=%x\n", rc);
+ continue;
+ }
+ brdp->irq = irq;
+
+#if 0
+ ioaddr = 0x0c000001;
+ if ((rc = pcibios_write_config_dword(busnr, devnr, 0x40, ioaddr))) {
+ printk("STALLION: failed to write register on PCI board, errno=%x\n", rc);
+ continue;
+ }
+ if ((rc = pcibios_write_config_dword(busnr, devnr, 0x48, ioaddr))) {
+ printk("STALLION: failed to write register on PCI board, errno=%x\n", rc);
+ continue;
+ }
+#endif
+
+ stl_brdinit(brdp);
+ }
+ }
+
+ return(0);
+}
+
+#endif
+
+/*****************************************************************************/
+
+/*
+ * Scan through all the boards in the configuration and see what we
+ * can find. Handle EIO and the ECH boards a little differently here
+ * since the initial search and setup is too different.
+ */
+
+static int stl_initbrds()
+{
+ stlbrd_t *brdp;
+ stlconf_t *confp;
+ int i;
+
+#if DEBUG
+ printk("stl_initbrds()\n");
+#endif
+
+ if (stl_nrbrds > STL_MAXBRDS) {
+ printk("STALLION: too many boards in configuration table, truncating to %d\n", STL_MAXBRDS);
+ stl_nrbrds = STL_MAXBRDS;
+ }
+
+/*
+ * Firstly scan the list of static boards configured. Allocate
+ * resources and initialize the boards as found.
+ */
+ for (i = 0; (i < stl_nrbrds); i++) {
+ confp = &stl_brdconf[i];
+ brdp = (stlbrd_t *) stl_memalloc(sizeof(stlbrd_t));
+ if (brdp == (stlbrd_t *) NULL) {
+ printk("STALLION: failed to allocate memory (size=%d)\n", sizeof(stlbrd_t));
+ return(-ENOMEM);
+ }
+ memset(brdp, 0, sizeof(stlbrd_t));
+
+ brdp->brdnr = i;
+ brdp->brdtype = confp->brdtype;
+ brdp->ioaddr1 = confp->ioaddr1;
+ brdp->ioaddr2 = confp->ioaddr2;
+ brdp->irq = confp->irq;
+ brdp->irqtype = confp->irqtype;
+ stl_brdinit(brdp);
+ }
+
+#ifdef CONFIG_PCI
+/*
+ * If the PCI BIOS support is compiled in then lets go looking for
+ * ECH-PCI boards.
+ */
+ stl_findpcibrds();
+#endif
+
+ return(0);
+}
+
+/*****************************************************************************/
+
+long stl_init(long kmem_start)
+{
+ printk("%s: version %s\n", stl_drvname, stl_drvversion);
+
+#ifndef MODULE
+ stl_meminit(kmem_start);
+#endif
+
+ 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 the tty driver structure and register us as a driver.
+ * Also setup the callout tty device.
+ */
+ memset(&stl_serial, 0, sizeof(struct tty_driver));
+ stl_serial.magic = TTY_DRIVER_MAGIC;
+ stl_serial.name = stl_serialname;
+ stl_serial.major = STL_SERIALMAJOR;
+ stl_serial.minor_start = 0;
+ stl_serial.num = STL_MAXBRDS * STL_MAXPORTS;
+ stl_serial.type = TTY_DRIVER_TYPE_SERIAL;
+ stl_serial.subtype = STL_DRVTYPSERIAL;
+ stl_serial.init_termios = stl_deftermios;
+ stl_serial.flags = TTY_DRIVER_REAL_RAW;
+ stl_serial.refcount = &stl_refcount;
+ stl_serial.table = stl_ttys;
+ stl_serial.termios = stl_termios;
+ stl_serial.termios_locked = stl_termioslocked;
+
+ stl_serial.open = stl_open;
+ stl_serial.close = stl_close;
+ stl_serial.write = stl_write;
+ stl_serial.put_char = stl_putchar;
+ stl_serial.flush_chars = stl_flushchars;
+ stl_serial.write_room = stl_writeroom;
+ stl_serial.chars_in_buffer = stl_charsinbuffer;
+ stl_serial.ioctl = stl_ioctl;
+ stl_serial.set_termios = stl_settermios;
+ stl_serial.throttle = stl_throttle;
+ stl_serial.unthrottle = stl_unthrottle;
+ stl_serial.stop = stl_stop;
+ stl_serial.start = stl_start;
+ stl_serial.hangup = stl_hangup;
+ stl_serial.flush_buffer = stl_flushbuffer;
+
+ stl_callout = stl_serial;
+ stl_callout.name = stl_calloutname;
+ stl_callout.major = STL_CALLOUTMAJOR;
+ stl_callout.subtype = STL_DRVTYPCALLOUT;
+
+ if (tty_register_driver(&stl_serial))
+ printk("STALLION: failed to register serial driver\n");
+ if (tty_register_driver(&stl_callout))
+ printk("STALLION: failed to register callout driver\n");
+
+#ifndef MODULE
+ kmem_start = stl_memhalt();
+#endif
+ return(kmem_start);
+}
+
+/*****************************************************************************/
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov
with Sam's (original) version of this