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linux-sg2042/drivers/char/ser_a2232.c

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/* 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/interrupt.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/sched.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 <linux/mutex.h>
#include <linux/delay.h>
#include <linux/serial.h>
#include <linux/generic_serial.h>
#include <linux/tty_flip.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);
/* 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_carrier_raised(struct tty_port *port);
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_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.port.tty;
#if 0
switch(err) {
case TTY_BREAK:
break;
case TTY_PARITY:
break;
case TTY_OVERRUN:
break;
case TTY_FRAME:
break;
}
#endif
tty_insert_flip_char(tty, ch, err);
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.port.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.port.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_carrier_raised(struct tty_port *port)
{
struct a2232_port *ap = container_of(port, struct a2232_port, gs.port);
return ap->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.port.flags &= ~GS_ACTIVE;
if (port->gs.port.tty && port->gs.port.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.port.tty || !port->gs.port.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.port.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.port.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.port.flags &= ~ASYNC_CHECK_CD;
else
port->gs.port.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 = tty->driver_data;
port->throttle_input = -1;
}
static void a2232_unthrottle(struct tty_struct *tty)
{
/* Unthrottle: dual to "throttle()" above. */
struct a2232_port *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.port.tty = tty;
port->gs.port.count++;
retval = gs_init_port(&port->gs);
if (retval) {
port->gs.port.count--;
return retval;
}
port->gs.port.flags |= GS_ACTIVE;
retval = gs_block_til_ready(port, filp);
if (retval) {
port->gs.port.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)
{
#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.port.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.port.tty->stopped) &&
(!port->gs.port.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.port.tty) {
tty_wakeup(port->gs.port.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.port.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.port.open_wait);
}
else { // if DCD off: DCD went DOWN!
if (port->gs.port.tty)
tty_hangup (port->gs.port.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 const struct tty_port_operations a2232_port_ops = {
.carrier_raised = a2232_carrier_raised,
};
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;
tty_port_init(&port->gs.port);
port->gs.port.ops = &a2232_port_ops;
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;
}
}
static const 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->init_termios.c_ispeed = 9600;
a2232_driver->init_termios.c_ospeed = 9600;
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;
int error, i;
#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?
error = request_irq(IRQ_AMIGA_VERTB, a2232_vbl_inter, 0,
"A2232 serial VBL", a2232_driver_ID);
if (error) {
for (i = 0; i < nr_a2232; i++)
zorro_release_device(zd_a2232[i]);
tty_unregister_driver(a2232_driver);
put_tty_driver(a2232_driver);
}
return error;
}
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");
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