Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 825 insertions, 0 deletions

diff --git a/drivers/char/ser_a2232.c b/drivers/char/ser_a2232.c
new file mode 100644
index 000000000000..6b4e9d155f50
--- /dev/null
+++ b/drivers/char/ser_a2232.c
@@ -0,0 +1,825 @@
+/* drivers/char/ser_a2232.c */
+
+/* $Id: ser_a2232.c,v 0.4 2000/01/25 12:00:00 ehaase Exp $ */
+
+/* Linux serial driver for the Amiga A2232 board */
+
+/* This driver is MAINTAINED. Before applying any changes, please contact
+ * the author.
+ */
+
+/* Copyright (c) 2000-2001 Enver Haase    <ehaase@inf.fu-berlin.de>
+ *                   alias The A2232 driver project <A2232@gmx.net>
+ * All rights reserved.
+ *
+ *   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.
+ *
+ */
+/***************************** Documentation ************************/
+/*
+ * This driver is in EXPERIMENTAL state. That means I could not find
+ * someone with five A2232 boards with 35 ports running at 19200 bps
+ * at the same time and test the machine's behaviour.
+ * However, I know that you can performance-tweak this driver (see
+ * the source code).
+ * One thing to consider is the time this driver consumes during the
+ * Amiga's vertical blank interrupt. Everything that is to be done
+ * _IS DONE_ when entering the vertical blank interrupt handler of
+ * this driver.
+ * However, it would be more sane to only do the job for only ONE card
+ * instead of ALL cards at a time; or, more generally, to handle only
+ * SOME ports instead of ALL ports at a time.
+ * However, as long as no-one runs into problems I guess I shouldn't
+ * change the driver as it runs fine for me :) .
+ *
+ * Version history of this file:
+ * 0.4  Resolved licensing issues.
+ * 0.3  Inclusion in the Linux/m68k tree, small fixes.
+ * 0.2  Added documentation, minor typo fixes.
+ * 0.1  Initial release.
+ *
+ * TO DO:
+ * -    Handle incoming BREAK events. I guess "Stevens: Advanced
+ *      Programming in the UNIX(R) Environment" is a good reference
+ *      on what is to be done.
+ * -    When installing as a module, don't simply 'printk' text, but
+ *      send it to the TTY used by the user.
+ *
+ * THANKS TO:
+ * -    Jukka Marin (65EC02 code).
+ * -    The other NetBSD developers on whose A2232 driver I had a
+ *      pretty close look. However, I didn't copy any code so it
+ *      is okay to put my code under the GPL and include it into
+ *      Linux.
+ */
+/***************************** End of Documentation *****************/
+
+/***************************** Defines ******************************/
+/*
+ * Enables experimental 115200 (normal) 230400 (turbo) baud rate.
+ * The A2232 specification states it can only operate at speeds up to
+ * 19200 bits per second, and I was not able to send a file via
+ * "sz"/"rz" and a null-modem cable from one A2232 port to another
+ * at 115200 bits per second.
+ * However, this might work for you.
+ */
+#undef A2232_SPEEDHACK
+/*
+ * Default is not to use RTS/CTS so you could be talked to death.
+ */
+#define A2232_SUPPRESS_RTSCTS_WARNING
+/************************* End of Defines ***************************/
+
+/***************************** Includes *****************************/
+#include <linux/module.h>
+
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/tty.h>
+
+#include <asm/setup.h>
+#include <asm/amigaints.h>
+#include <asm/amigahw.h>
+#include <linux/zorro.h>
+#include <asm/irq.h>
+#include <asm/semaphore.h>
+
+#include <linux/delay.h>
+
+#include <linux/serial.h>
+#include <linux/generic_serial.h>
+
+#include "ser_a2232.h"
+#include "ser_a2232fw.h"
+/************************* End of Includes **************************/
+
+/***************************** Prototypes ***************************/
+/* The interrupt service routine */
+static irqreturn_t a2232_vbl_inter(int irq, void *data, struct pt_regs *fp);
+/* Initialize the port structures */
+static void a2232_init_portstructs(void);
+/* Initialize and register TTY drivers. */
+/* returns 0 IFF successful */
+static int a2232_init_drivers(void); 
+
+/* BEGIN GENERIC_SERIAL PROTOTYPES */
+static void a2232_disable_tx_interrupts(void *ptr);
+static void a2232_enable_tx_interrupts(void *ptr);
+static void a2232_disable_rx_interrupts(void *ptr);
+static void a2232_enable_rx_interrupts(void *ptr);
+static int  a2232_get_CD(void *ptr);
+static void a2232_shutdown_port(void *ptr);
+static int  a2232_set_real_termios(void *ptr);
+static int  a2232_chars_in_buffer(void *ptr);
+static void a2232_close(void *ptr);
+static void a2232_hungup(void *ptr);
+/* static void a2232_getserial (void *ptr, struct serial_struct *sp); */
+/* END GENERIC_SERIAL PROTOTYPES */
+
+/* Functions that the TTY driver struct expects */
+static int  a2232_ioctl(struct tty_struct *tty, struct file *file,
+                                                                                unsigned int cmd, unsigned long arg);
+static void a2232_throttle(struct tty_struct *tty);
+static void a2232_unthrottle(struct tty_struct *tty);
+static int  a2232_open(struct tty_struct * tty, struct file * filp);
+/************************* End of Prototypes ************************/
+
+/***************************** Global variables *********************/
+/*---------------------------------------------------------------------------
+ * Interface from generic_serial.c back here
+ *--------------------------------------------------------------------------*/
+static struct real_driver a2232_real_driver = {
+        a2232_disable_tx_interrupts,
+        a2232_enable_tx_interrupts,
+        a2232_disable_rx_interrupts,
+        a2232_enable_rx_interrupts,
+        a2232_get_CD,
+        a2232_shutdown_port,
+        a2232_set_real_termios,
+        a2232_chars_in_buffer,
+        a2232_close,
+        a2232_hungup,
+        NULL    /* a2232_getserial */
+};
+
+static void *a2232_driver_ID = &a2232_driver_ID; // Some memory address WE own.
+
+/* Ports structs */
+static struct a2232_port a2232_ports[MAX_A2232_BOARDS*NUMLINES];
+
+/* TTY driver structs */
+static struct tty_driver *a2232_driver;
+
+/* nr of cards completely (all ports) and correctly configured */
+static int nr_a2232; 
+
+/* zorro_dev structs for the A2232's */
+static struct zorro_dev *zd_a2232[MAX_A2232_BOARDS]; 
+/***************************** End of Global variables **************/
+
+/* Helper functions */
+
+static inline volatile struct a2232memory *a2232mem(unsigned int board)
+{
+        return (volatile struct a2232memory *)ZTWO_VADDR(zd_a2232[board]->resource.start);
+}
+
+static inline volatile struct a2232status *a2232stat(unsigned int board,
+                                                     unsigned int portonboard)
+{
+        volatile struct a2232memory *mem = a2232mem(board);
+        return &(mem->Status[portonboard]);
+}
+
+static inline void a2232_receive_char(struct a2232_port *port, int ch, int err)
+{
+/*      Mostly stolen from other drivers.
+        Maybe one could implement a more efficient version by not only
+        transferring one character at a time.
+*/
+        struct tty_struct *tty = port->gs.tty;
+
+        if (tty->flip.count >= TTY_FLIPBUF_SIZE)
+                return;
+
+        tty->flip.count++;
+
+#if 0
+        switch(err) {
+        case TTY_BREAK:
+                break;
+        case TTY_PARITY:
+                break;
+        case TTY_OVERRUN:
+                break;
+        case TTY_FRAME:
+                break;
+        }
+#endif
+
+        *tty->flip.flag_buf_ptr++ = err;
+        *tty->flip.char_buf_ptr++ = ch;
+        tty_flip_buffer_push(tty);
+}
+
+/***************************** Functions ****************************/
+/*** BEGIN OF REAL_DRIVER FUNCTIONS ***/
+
+static void a2232_disable_tx_interrupts(void *ptr)
+{
+        struct a2232_port *port;
+        volatile struct a2232status *stat;
+        unsigned long flags;
+  
+        port = ptr;
+        stat = a2232stat(port->which_a2232, port->which_port_on_a2232);
+        stat->OutDisable = -1;
+
+        /* Does this here really have to be? */
+        local_irq_save(flags);
+        port->gs.flags &= ~GS_TX_INTEN;
+        local_irq_restore(flags);
+}
+
+static void a2232_enable_tx_interrupts(void *ptr)
+{
+        struct a2232_port *port;
+        volatile struct a2232status *stat;
+        unsigned long flags;
+
+        port = ptr;
+        stat = a2232stat(port->which_a2232, port->which_port_on_a2232);
+        stat->OutDisable = 0;
+
+        /* Does this here really have to be? */
+        local_irq_save(flags);
+        port->gs.flags |= GS_TX_INTEN;
+        local_irq_restore(flags);
+}
+
+static void a2232_disable_rx_interrupts(void *ptr)
+{
+        struct a2232_port *port;
+        port = ptr;
+        port->disable_rx = -1;
+}
+
+static void a2232_enable_rx_interrupts(void *ptr)
+{
+        struct a2232_port *port;
+        port = ptr;
+        port->disable_rx = 0;
+}
+
+static int  a2232_get_CD(void *ptr)
+{
+        return ((struct a2232_port *) ptr)->cd_status;
+}
+
+static void a2232_shutdown_port(void *ptr)
+{
+        struct a2232_port *port;
+        volatile struct a2232status *stat;
+        unsigned long flags;
+
+        port = ptr;
+        stat = a2232stat(port->which_a2232, port->which_port_on_a2232);
+
+        local_irq_save(flags);
+
+        port->gs.flags &= ~GS_ACTIVE;
+        
+        if (port->gs.tty && port->gs.tty->termios->c_cflag & HUPCL) {
+                /* Set DTR and RTS to Low, flush output.
+                   The NetBSD driver "msc.c" does it this way. */
+                stat->Command = (       (stat->Command & ~A2232CMD_CMask) | 
+                                        A2232CMD_Close );
+                stat->OutFlush = -1;
+                stat->Setup = -1;
+        }
+
+        local_irq_restore(flags);
+        
+        /* After analyzing control flow, I think a2232_shutdown_port
+                is actually the last call from the system when at application
+                level someone issues a "echo Hello >>/dev/ttyY0".
+                Therefore I think the MOD_DEC_USE_COUNT should be here and
+                not in "a2232_close()". See the comment in "sx.c", too.
+                If you run into problems, compile this driver into the
+                kernel instead of compiling it as a module. */
+}
+
+static int  a2232_set_real_termios(void *ptr)
+{
+        unsigned int cflag, baud, chsize, stopb, parity, softflow;
+        int rate;
+        int a2232_param, a2232_cmd;
+        unsigned long flags;
+        unsigned int i;
+        struct a2232_port *port = ptr;
+        volatile struct a2232status *status;
+        volatile struct a2232memory *mem;
+
+        if (!port->gs.tty || !port->gs.tty->termios) return 0;
+
+        status = a2232stat(port->which_a2232, port->which_port_on_a2232);
+        mem = a2232mem(port->which_a2232);
+        
+        a2232_param = a2232_cmd = 0;
+
+        // get baud rate
+        baud = port->gs.baud;
+        if (baud == 0) {
+                /* speed == 0 -> drop DTR, do nothing else */
+                local_irq_save(flags);
+                // Clear DTR (and RTS... mhhh).
+                status->Command = (     (status->Command & ~A2232CMD_CMask) |
+                                        A2232CMD_Close );
+                status->OutFlush = -1;
+                status->Setup = -1;
+                
+                local_irq_restore(flags);
+                return 0;
+        }
+        
+        rate = A2232_BAUD_TABLE_NOAVAIL;
+        for (i=0; i < A2232_BAUD_TABLE_NUM_RATES * 3; i += 3){
+                if (a2232_baud_table[i] == baud){
+                        if (mem->Common.Crystal == A2232_TURBO) rate = a2232_baud_table[i+2];
+                        else                                    rate = a2232_baud_table[i+1];
+                }
+        }
+        if (rate == A2232_BAUD_TABLE_NOAVAIL){
+                printk("a2232: Board %d Port %d unsupported baud rate: %d baud. Using another.\n",port->which_a2232,port->which_port_on_a2232,baud);
+                // This is useful for both (turbo or normal) Crystal versions.
+                rate = A2232PARAM_B9600;
+        }
+        a2232_param |= rate;
+
+        cflag  = port->gs.tty->termios->c_cflag;
+
+        // get character size
+        chsize = cflag & CSIZE;
+        switch (chsize){
+                case CS8:       a2232_param |= A2232PARAM_8Bit; break;
+                case CS7:       a2232_param |= A2232PARAM_7Bit; break;
+                case CS6:       a2232_param |= A2232PARAM_6Bit; break;
+                case CS5:       a2232_param |= A2232PARAM_5Bit; break;
+                default:        printk("a2232: Board %d Port %d unsupported character size: %d. Using 8 data bits.\n",
+                                        port->which_a2232,port->which_port_on_a2232,chsize);
+                                a2232_param |= A2232PARAM_8Bit; break;
+        }
+
+        // get number of stop bits
+        stopb  = cflag & CSTOPB;
+        if (stopb){ // two stop bits instead of one
+                printk("a2232: Board %d Port %d 2 stop bits unsupported. Using 1 stop bit.\n",
+                        port->which_a2232,port->which_port_on_a2232);
+        }
+
+        // Warn if RTS/CTS not wanted
+        if (!(cflag & CRTSCTS)){
+#ifndef A2232_SUPPRESS_RTSCTS_WARNING
+                printk("a2232: Board %d Port %d cannot switch off firmware-implemented RTS/CTS hardware flow control.\n",
+                        port->which_a2232,port->which_port_on_a2232);
+#endif
+        }
+
+        /*      I think this is correct.
+                However, IXOFF means _input_ flow control and I wonder
+                if one should care about IXON _output_ flow control,
+                too. If this makes problems, one should turn the A2232
+                firmware XON/XOFF "SoftFlow" flow control off and use
+                the conventional way of inserting START/STOP characters
+                by hand in throttle()/unthrottle().
+        */
+        softflow = !!( port->gs.tty->termios->c_iflag & IXOFF );
+
+        // get Parity (Enabled/Disabled? If Enabled, Odd or Even?)
+        parity = cflag & (PARENB | PARODD);
+        if (parity & PARENB){
+                if (parity & PARODD){
+                        a2232_cmd |= A2232CMD_OddParity;
+                }
+                else{
+                        a2232_cmd |= A2232CMD_EvenParity;
+                }
+        }
+        else a2232_cmd |= A2232CMD_NoParity;
+
+
+        /*      Hmm. Maybe an own a2232_port structure
+                member would be cleaner?        */
+        if (cflag & CLOCAL)
+                port->gs.flags &= ~ASYNC_CHECK_CD;
+        else
+                port->gs.flags |= ASYNC_CHECK_CD;
+
+
+        /* Now we have all parameters and can go to set them: */
+        local_irq_save(flags);
+
+        status->Param = a2232_param | A2232PARAM_RcvBaud;
+        status->Command = a2232_cmd | A2232CMD_Open |  A2232CMD_Enable;
+        status->SoftFlow = softflow;
+        status->OutDisable = 0;
+        status->Setup = -1;
+
+        local_irq_restore(flags);
+        return 0;
+}
+
+static int  a2232_chars_in_buffer(void *ptr)
+{
+        struct a2232_port *port;
+        volatile struct a2232status *status; 
+        unsigned char ret; /* we need modulo-256 arithmetics */
+        port = ptr;
+        status = a2232stat(port->which_a2232, port->which_port_on_a2232);
+#if A2232_IOBUFLEN != 256
+#error "Re-Implement a2232_chars_in_buffer()!"
+#endif
+        ret = (status->OutHead - status->OutTail);
+        return ret;
+}
+
+static void a2232_close(void *ptr)
+{
+        a2232_disable_tx_interrupts(ptr);
+        a2232_disable_rx_interrupts(ptr);
+        /* see the comment in a2232_shutdown_port above. */
+}
+
+static void a2232_hungup(void *ptr)
+{
+        a2232_close(ptr);
+}
+/*** END   OF REAL_DRIVER FUNCTIONS ***/
+
+/*** BEGIN  FUNCTIONS EXPECTED BY TTY DRIVER STRUCTS ***/
+static int a2232_ioctl( struct tty_struct *tty, struct file *file,
+                        unsigned int cmd, unsigned long arg)
+{
+        return -ENOIOCTLCMD;
+}
+
+static void a2232_throttle(struct tty_struct *tty)
+{
+/* Throttle: System cannot take another chars: Drop RTS or
+             send the STOP char or whatever.
+   The A2232 firmware does RTS/CTS anyway, and XON/XOFF
+   if switched on. So the only thing we can do at this
+   layer here is not taking any characters out of the
+   A2232 buffer any more. */
+        struct a2232_port *port = (struct a2232_port *) tty->driver_data;
+        port->throttle_input = -1;
+}
+
+static void a2232_unthrottle(struct tty_struct *tty)
+{
+/* Unthrottle: dual to "throttle()" above. */
+        struct a2232_port *port = (struct a2232_port *) tty->driver_data;
+        port->throttle_input = 0;
+}
+
+static int  a2232_open(struct tty_struct * tty, struct file * filp)
+{
+/* More or less stolen from other drivers. */
+        int line;
+        int retval;
+        struct a2232_port *port;
+
+        line = tty->index;
+        port = &a2232_ports[line];
+        
+        tty->driver_data = port;
+        port->gs.tty = tty;
+        port->gs.count++;
+        retval = gs_init_port(&port->gs);
+        if (retval) {
+                port->gs.count--;
+                return retval;
+        }
+        port->gs.flags |= GS_ACTIVE;
+        retval = gs_block_til_ready(port, filp);
+
+        if (retval) {
+                port->gs.count--;
+                return retval;
+        }
+
+        a2232_enable_rx_interrupts(port);
+        
+        return 0;
+}
+/*** END OF FUNCTIONS EXPECTED BY TTY DRIVER STRUCTS ***/
+
+static irqreturn_t a2232_vbl_inter(int irq, void *data, struct pt_regs *fp)
+{
+#if A2232_IOBUFLEN != 256
+#error "Re-Implement a2232_vbl_inter()!"
+#endif
+
+struct a2232_port *port;
+volatile struct a2232memory *mem;
+volatile struct a2232status *status;
+unsigned char newhead;
+unsigned char bufpos; /* Must be unsigned char. We need the modulo-256 arithmetics */
+unsigned char ncd, ocd, ccd; /* names consistent with the NetBSD driver */
+volatile u_char *ibuf, *cbuf, *obuf;
+int ch, err, n, p;
+        for (n = 0; n < nr_a2232; n++){         /* for every completely initialized A2232 board */
+                mem = a2232mem(n);
+                for (p = 0; p < NUMLINES; p++){ /* for every port on this board */
+                        err = 0;
+                        port = &a2232_ports[n*NUMLINES+p];
+                        if ( port->gs.flags & GS_ACTIVE ){ /* if the port is used */
+
+                                status = a2232stat(n,p);
+
+                                if (!port->disable_rx && !port->throttle_input){ /* If input is not disabled */
+                                        newhead = status->InHead;               /* 65EC02 write pointer */
+                                        bufpos = status->InTail;
+
+                                        /* check for input for this port */
+                                        if (newhead != bufpos) {
+                                                /* buffer for input chars/events */
+                                                ibuf = mem->InBuf[p];
+ 
+                                                /* data types of bytes in ibuf */
+                                                cbuf = mem->InCtl[p];
+ 
+                                                /* do for all chars */
+                                                while (bufpos != newhead) {
+                                                        /* which type of input data? */
+                                                        switch (cbuf[bufpos]) {
+                                                                /* switch on input event (CD, BREAK, etc.) */
+                                                        case A2232INCTL_EVENT:
+                                                                switch (ibuf[bufpos++]) {
+                                                                case A2232EVENT_Break:
+                                                                        /* TODO: Handle BREAK signal */
+                                                                        break;
+                                                                        /*      A2232EVENT_CarrierOn and A2232EVENT_CarrierOff are
+                                                                                handled in a separate queue and should not occur here. */
+                                                                case A2232EVENT_Sync:
+                                                                        printk("A2232: 65EC02 software sent SYNC event, don't know what to do. Ignoring.");
+                                                                        break;
+                                                                default:
+                                                                        printk("A2232: 65EC02 software broken, unknown event type %d occurred.\n",ibuf[bufpos-1]);
+                                                                } /* event type switch */
+                                                                break;
+                                                        case A2232INCTL_CHAR:
+                                                                /* Receive incoming char */
+                                                                a2232_receive_char(port, ibuf[bufpos], err);
+                                                                bufpos++;
+                                                                break;
+                                                        default:
+                                                                printk("A2232: 65EC02 software broken, unknown data type %d occurred.\n",cbuf[bufpos]);
+                                                                bufpos++;
+                                                        } /* switch on input data type */
+                                                } /* while there's something in the buffer */
+
+                                                status->InTail = bufpos;            /* tell 65EC02 what we've read */
+                                                
+                                        } /* if there was something in the buffer */                          
+                                } /* If input is not disabled */
+
+                                /* Now check if there's something to output */
+                                obuf = mem->OutBuf[p];
+                                bufpos = status->OutHead;
+                                while ( (port->gs.xmit_cnt > 0)         &&
+                                        (!port->gs.tty->stopped)        &&
+                                        (!port->gs.tty->hw_stopped) ){  /* While there are chars to transmit */
+                                        if (((bufpos+1) & A2232_IOBUFLENMASK) != status->OutTail) { /* If the A2232 buffer is not full */
+                                                ch = port->gs.xmit_buf[port->gs.xmit_tail];                                     /* get the next char to transmit */
+                                                port->gs.xmit_tail = (port->gs.xmit_tail+1) & (SERIAL_XMIT_SIZE-1); /* modulo-addition for the gs.xmit_buf ring-buffer */
+                                                obuf[bufpos++] = ch;                                                                                                                            /* put it into the A2232 buffer */
+                                                port->gs.xmit_cnt--;
+                                        }
+                                        else{                                                                                                                                                                                                   /* If A2232 the buffer is full */
+                                                break;                                                                                                                                                                                  /* simply stop filling it. */
+                                        }                                                                                                       
+                                }                                       
+                                status->OutHead = bufpos;
+                                        
+                                /* WakeUp if output buffer runs low */
+                                if ((port->gs.xmit_cnt <= port->gs.wakeup_chars) && port->gs.tty) {
+                                        tty_wakeup(port->gs.tty);
+                                }
+                        } // if the port is used
+                } // for every port on the board
+                        
+                /* Now check the CD message queue */
+                newhead = mem->Common.CDHead;
+                bufpos = mem->Common.CDTail;
+                if (newhead != bufpos){                         /* There are CD events in queue */
+                        ocd = mem->Common.CDStatus;             /* get old status bits */
+                        while (newhead != bufpos){              /* read all events */
+                                ncd = mem->CDBuf[bufpos++];     /* get one event */
+                                ccd = ncd ^ ocd;                /* mask of changed lines */
+                                ocd = ncd;                      /* save new status bits */
+                                for(p=0; p < NUMLINES; p++){    /* for all ports */
+                                        if (ccd & 1){           /* this one changed */
+
+                                                struct a2232_port *port = &a2232_ports[n*7+p];
+                                                port->cd_status = !(ncd & 1); /* ncd&1 <=> CD is now off */
+
+                                                if (!(port->gs.flags & ASYNC_CHECK_CD))
+                                                        ;       /* Don't report DCD changes */
+                                                else if (port->cd_status) { // if DCD on: DCD went UP!
+                                                        
+                                                        /* Are we blocking in open?*/
+                                                        wake_up_interruptible(&port->gs.open_wait);
+                                                }
+                                                else { // if DCD off: DCD went DOWN!
+                                                        if (port->gs.tty)
+                                                                tty_hangup (port->gs.tty);
+                                                }
+                                                
+                                        } // if CD changed for this port
+                                        ccd >>= 1;
+                                        ncd >>= 1;                                                                      /* Shift bits for next line */
+                                } // for every port
+                        } // while CD events in queue
+                        mem->Common.CDStatus = ocd; /* save new status */
+                        mem->Common.CDTail = bufpos; /* remove events */
+                } // if events in CD queue
+                
+        } // for every completely initialized A2232 board
+        return IRQ_HANDLED;
+}
+
+static void a2232_init_portstructs(void)
+{
+        struct a2232_port *port;
+        int i;
+
+        for (i = 0; i < MAX_A2232_BOARDS*NUMLINES; i++) {
+                port = a2232_ports + i;
+                port->which_a2232 = i/NUMLINES;
+                port->which_port_on_a2232 = i%NUMLINES;
+                port->disable_rx = port->throttle_input = port->cd_status = 0;
+                port->gs.magic = A2232_MAGIC;
+                port->gs.close_delay = HZ/2;
+                port->gs.closing_wait = 30 * HZ;
+                port->gs.rd = &a2232_real_driver;
+#ifdef NEW_WRITE_LOCKING
+                init_MUTEX(&(port->gs.port_write_sem));
+#endif
+                init_waitqueue_head(&port->gs.open_wait);
+                init_waitqueue_head(&port->gs.close_wait);
+        }
+}
+
+static struct tty_operations a2232_ops = {
+        .open = a2232_open,
+        .close = gs_close,
+        .write = gs_write,
+        .put_char = gs_put_char,
+        .flush_chars = gs_flush_chars,
+        .write_room = gs_write_room,
+        .chars_in_buffer = gs_chars_in_buffer,
+        .flush_buffer = gs_flush_buffer,
+        .ioctl = a2232_ioctl,
+        .throttle = a2232_throttle,
+        .unthrottle = a2232_unthrottle,
+        .set_termios = gs_set_termios,
+        .stop = gs_stop,
+        .start = gs_start,
+        .hangup = gs_hangup,
+};
+
+static int a2232_init_drivers(void)
+{
+        int error;
+
+        a2232_driver = alloc_tty_driver(NUMLINES * nr_a2232);
+        if (!a2232_driver)
+                return -ENOMEM;
+        a2232_driver->owner = THIS_MODULE;
+        a2232_driver->driver_name = "commodore_a2232";
+        a2232_driver->name = "ttyY";
+        a2232_driver->major = A2232_NORMAL_MAJOR;
+        a2232_driver->type = TTY_DRIVER_TYPE_SERIAL;
+        a2232_driver->subtype = SERIAL_TYPE_NORMAL;
+        a2232_driver->init_termios = tty_std_termios;
+        a2232_driver->init_termios.c_cflag =
+                B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+        a2232_driver->flags = TTY_DRIVER_REAL_RAW;
+        tty_set_operations(a2232_driver, &a2232_ops);
+        if ((error = tty_register_driver(a2232_driver))) {
+                printk(KERN_ERR "A2232: Couldn't register A2232 driver, error = %d\n",
+                       error);
+                put_tty_driver(a2232_driver);
+                return 1;
+        }
+        return 0;
+}
+
+static int __init a2232board_init(void)
+{
+        struct zorro_dev *z;
+
+        unsigned int boardaddr;
+        int bcount;
+        short start;
+        u_char *from;
+        volatile u_char *to;
+        volatile struct a2232memory *mem;
+
+#ifdef CONFIG_SMP
+        return -ENODEV; /* This driver is not SMP aware. Is there an SMP ZorroII-bus-machine? */
+#endif
+
+        if (!MACH_IS_AMIGA){
+                return -ENODEV;
+        }
+
+        printk("Commodore A2232 driver initializing.\n"); /* Say that we're alive. */
+
+        z = NULL;
+        nr_a2232 = 0;
+        while ( (z = zorro_find_device(ZORRO_WILDCARD, z)) ){
+                if (    (z->id != ZORRO_PROD_CBM_A2232_PROTOTYPE) && 
+                        (z->id != ZORRO_PROD_CBM_A2232) ){
+                        continue;       // The board found was no A2232
+                }
+                if (!zorro_request_device(z,"A2232 driver"))
+                        continue;
+
+                printk("Commodore A2232 found (#%d).\n",nr_a2232);
+
+                zd_a2232[nr_a2232] = z;
+
+                boardaddr = ZTWO_VADDR( z->resource.start );
+                printk("Board is located at address 0x%x, size is 0x%x.\n", boardaddr, (unsigned int) ((z->resource.end+1) - (z->resource.start)));
+
+                mem = (volatile struct a2232memory *) boardaddr;
+
+                (void) mem->Enable6502Reset;   /* copy the code across to the board */
+                to = (u_char *)mem;  from = a2232_65EC02code; bcount = sizeof(a2232_65EC02code) - 2;
+                start = *(short *)from;
+                from += sizeof(start);
+                to += start;
+                while(bcount--) *to++ = *from++;
+                printk("65EC02 software uploaded to the A2232 memory.\n");
+  
+                mem->Common.Crystal = A2232_UNKNOWN;  /* use automatic speed check */
+  
+                /* start 6502 running */
+                (void) mem->ResetBoard;
+                printk("A2232's 65EC02 CPU up and running.\n");
+  
+                /* wait until speed detector has finished */
+                for (bcount = 0; bcount < 2000; bcount++) {
+                        udelay(1000);
+                        if (mem->Common.Crystal)
+                                break;
+                }
+                printk((mem->Common.Crystal?"A2232 oscillator crystal detected by 65EC02 software: ":"65EC02 software could not determine A2232 oscillator crystal: "));
+                switch (mem->Common.Crystal){
+                case A2232_UNKNOWN:
+                        printk("Unknown crystal.\n");
+                        break;
+                case A2232_NORMAL:
+                        printk ("Normal crystal.\n");
+                        break;
+                case A2232_TURBO:
+                        printk ("Turbo crystal.\n");
+                        break;
+                default:
+                        printk ("0x%x. Huh?\n",mem->Common.Crystal);
+                }
+
+                nr_a2232++;
+
+        }       
+
+        printk("Total: %d A2232 boards initialized.\n.", nr_a2232); /* Some status report if no card was found */
+
+        a2232_init_portstructs();
+
+        /*
+                a2232_init_drivers also registers the drivers. Must be here because all boards
+                have to be detected first.
+        */
+        if (a2232_init_drivers()) return -ENODEV; // maybe we should use a different -Exxx?
+
+        request_irq(IRQ_AMIGA_VERTB, a2232_vbl_inter, 0, "A2232 serial VBL", a2232_driver_ID);
+        return 0;
+}
+
+static void __exit a2232board_exit(void)
+{
+        int i;
+
+        for (i = 0; i < nr_a2232; i++) {
+                zorro_release_device(zd_a2232[i]);
+        }
+
+        tty_unregister_driver(a2232_driver);
+        put_tty_driver(a2232_driver);
+        free_irq(IRQ_AMIGA_VERTB, a2232_driver_ID);
+}
+
+module_init(a2232board_init);
+module_exit(a2232board_exit);
+
+MODULE_AUTHOR("Enver Haase");
+MODULE_DESCRIPTION("Amiga A2232 multi-serial board driver");
+MODULE_LICENSE("GPL");