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1275 |
phoenix |
/* drivers/char/ser_a2232.c */
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/* $Id: ser_a2232.c,v 1.1.1.1 2004-04-15 02:00:44 phoenix Exp $ */
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/* Linux serial driver for the Amiga A2232 board */
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/* This driver is MAINTAINED. Before applying any changes, please contact
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* the author.
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*/
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/* Copyright (c) 2000-2001 Enver Haase <ehaase@inf.fu-berlin.de>
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* alias The A2232 driver project <A2232@gmx.net>
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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/***************************** Documentation ************************/
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/*
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* This driver is in EXPERIMENTAL state. That means I could not find
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* someone with five A2232 boards with 35 ports running at 19200 bps
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* at the same time and test the machine's behaviour.
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* However, I know that you can performance-tweak this driver (see
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* the source code).
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* One thing to consider is the time this driver consumes during the
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* Amiga's vertical blank interrupt. Everything that is to be done
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* _IS DONE_ when entering the vertical blank interrupt handler of
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* this driver.
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* However, it would be more sane to only do the job for only ONE card
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* instead of ALL cards at a time; or, more generally, to handle only
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* SOME ports instead of ALL ports at a time.
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* However, as long as no-one runs into problems I guess I shouldn't
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* change the driver as it runs fine for me :) .
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*
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* Version history of this file:
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* 0.4 Resolved licensing issues.
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* 0.3 Inclusion in the Linux/m68k tree, small fixes.
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* 0.2 Added documentation, minor typo fixes.
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* 0.1 Initial release.
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*
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* TO DO:
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* - Handle incoming BREAK events. I guess "Stevens: Advanced
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* Programming in the UNIX(R) Environment" is a good reference
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* on what is to be done.
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* - When installing as a module, don't simply 'printk' text, but
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* send it to the TTY used by the user.
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*
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* THANKS TO:
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* - Jukka Marin (65EC02 code).
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* - The other NetBSD developers on whose A2232 driver I had a
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* pretty close look. However, I didn't copy any code so it
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* is okay to put my code under the GPL and include it into
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* Linux.
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*/
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/***************************** End of Documentation *****************/
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/***************************** Defines ******************************/
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/*
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* Enables experimental 115200 (normal) 230400 (turbo) baud rate.
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* The A2232 specification states it can only operate at speeds up to
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* 19200 bits per second, and I was not able to send a file via
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* "sz"/"rz" and a null-modem cable from one A2232 port to another
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* at 115200 bits per second.
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* However, this might work for you.
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*/
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#undef A2232_SPEEDHACK
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/*
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* Default is not to use RTS/CTS so you could be talked to death.
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*/
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#define A2232_SUPPRESS_RTSCTS_WARNING
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/************************* End of Defines ***************************/
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/***************************** Includes *****************************/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <asm/setup.h>
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#include <asm/amigaints.h>
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#include <asm/amigahw.h>
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#include <linux/zorro.h>
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#include <asm/irq.h>
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#include <asm/semaphore.h>
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#include <linux/delay.h>
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#include <linux/serial.h>
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#include <linux/generic_serial.h>
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#include "ser_a2232.h"
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#include "ser_a2232fw.h"
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/************************* End of Includes **************************/
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/***************************** Prototypes ***************************/
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/* Helper functions */
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static __inline__ volatile struct a2232status *a2232stat(unsigned int board,
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unsigned int portonboard);
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static __inline__ volatile struct a2232memory *a2232mem (unsigned int board);
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static __inline__ void a2232_receive_char( struct a2232_port *port,
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int ch, int err );
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/* The interrupt service routine */
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static void a2232_vbl_inter(int irq, void *data, struct pt_regs *fp);
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/* Initialize the port structures */
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static void a2232_init_portstructs(void);
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/* Initialize and register TTY drivers. */
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/* returns 0 IFF successful */
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static int a2232_init_drivers(void);
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/* Initialize all A2232 boards; main entry point. */
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int a2232board_init(void);
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/* BEGIN GENERIC_SERIAL PROTOTYPES */
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static void a2232_disable_tx_interrupts(void *ptr);
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static void a2232_enable_tx_interrupts(void *ptr);
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static void a2232_disable_rx_interrupts(void *ptr);
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static void a2232_enable_rx_interrupts(void *ptr);
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static int a2232_get_CD(void *ptr);
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static void a2232_shutdown_port(void *ptr);
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static int a2232_set_real_termios(void *ptr);
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static int a2232_chars_in_buffer(void *ptr);
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static void a2232_close(void *ptr);
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static void a2232_hungup(void *ptr);
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/* static void a2232_getserial (void *ptr, struct serial_struct *sp); */
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/* END GENERIC_SERIAL PROTOTYPES */
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/* Functions that the TTY driver struct expects */
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static int a2232_ioctl(struct tty_struct *tty, struct file *file,
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unsigned int cmd, unsigned long arg);
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static void a2232_throttle(struct tty_struct *tty);
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static void a2232_unthrottle(struct tty_struct *tty);
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static int a2232_open(struct tty_struct * tty, struct file * filp);
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/************************* End of Prototypes ************************/
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/***************************** Global variables *********************/
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/*---------------------------------------------------------------------------
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* Interface from generic_serial.c back here
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*--------------------------------------------------------------------------*/
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static struct real_driver a2232_real_driver = {
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a2232_disable_tx_interrupts,
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a2232_enable_tx_interrupts,
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a2232_disable_rx_interrupts,
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a2232_enable_rx_interrupts,
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a2232_get_CD,
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a2232_shutdown_port,
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a2232_set_real_termios,
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a2232_chars_in_buffer,
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a2232_close,
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a2232_hungup,
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NULL /* a2232_getserial */
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};
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static void *a2232_driver_ID = &a2232_driver_ID; // Some memory address WE own.
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/* Ports structs */
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static struct a2232_port a2232_ports[MAX_A2232_BOARDS*NUMLINES];
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/* TTY driver structs */
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static struct tty_driver a2232_driver;
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static struct tty_driver a2232_callout_driver;
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/* Variables used by the TTY driver */
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static int a2232_refcount;
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static struct tty_struct *a2232_table[MAX_A2232_BOARDS*NUMLINES] = { NULL, };
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static struct termios *a2232_termios[MAX_A2232_BOARDS*NUMLINES];
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static struct termios *a2232_termios_locked[MAX_A2232_BOARDS*NUMLINES];
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/* nr of cards completely (all ports) and correctly configured */
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static int nr_a2232;
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/* zorro_dev structs for the A2232's */
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static struct zorro_dev *zd_a2232[MAX_A2232_BOARDS];
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/***************************** End of Global variables **************/
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/***************************** Functions ****************************/
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/*** BEGIN OF REAL_DRIVER FUNCTIONS ***/
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static void a2232_disable_tx_interrupts(void *ptr)
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{
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struct a2232_port *port;
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volatile struct a2232status *stat;
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unsigned long flags;
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port = ptr;
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stat = a2232stat(port->which_a2232, port->which_port_on_a2232);
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stat->OutDisable = -1;
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/* Does this here really have to be? */
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save_flags(flags);
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cli();
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port->gs.flags &= ~GS_TX_INTEN;
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restore_flags(flags);
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}
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static void a2232_enable_tx_interrupts(void *ptr)
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{
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struct a2232_port *port;
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volatile struct a2232status *stat;
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unsigned long flags;
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port = ptr;
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stat = a2232stat(port->which_a2232, port->which_port_on_a2232);
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stat->OutDisable = 0;
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/* Does this here really have to be? */
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save_flags(flags);
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cli();
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port->gs.flags |= GS_TX_INTEN;
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restore_flags(flags);
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}
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static void a2232_disable_rx_interrupts(void *ptr)
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{
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struct a2232_port *port;
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port = ptr;
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port->disable_rx = -1;
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}
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static void a2232_enable_rx_interrupts(void *ptr)
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{
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struct a2232_port *port;
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port = ptr;
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port->disable_rx = 0;
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}
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| 240 |
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static int a2232_get_CD(void *ptr)
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{
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return ((struct a2232_port *) ptr)->cd_status;
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}
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static void a2232_shutdown_port(void *ptr)
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{
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struct a2232_port *port;
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| 248 |
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volatile struct a2232status *stat;
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| 249 |
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unsigned long flags;
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port = ptr;
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stat = a2232stat(port->which_a2232, port->which_port_on_a2232);
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| 254 |
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save_flags(flags);
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cli();
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port->gs.flags &= ~GS_ACTIVE;
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| 259 |
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if (port->gs.tty && port->gs.tty->termios->c_cflag & HUPCL) {
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/* Set DTR and RTS to Low, flush output.
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The NetBSD driver "msc.c" does it this way. */
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stat->Command = ( (stat->Command & ~A2232CMD_CMask) |
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| 263 |
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A2232CMD_Close );
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stat->OutFlush = -1;
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| 265 |
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stat->Setup = -1;
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| 266 |
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}
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| 267 |
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| 268 |
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restore_flags(flags);
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| 269 |
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|
| 270 |
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/* After analyzing control flow, I think a2232_shutdown_port
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| 271 |
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is actually the last call from the system when at application
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| 272 |
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level someone issues a "echo Hello >>/dev/ttyY0".
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| 273 |
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Therefore I think the MOD_DEC_USE_COUNT should be here and
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| 274 |
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not in "a2232_close()". See the comment in "sx.c", too.
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| 275 |
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If you run into problems, compile this driver into the
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| 276 |
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kernel instead of compiling it as a module. */
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| 277 |
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MOD_DEC_USE_COUNT;
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| 278 |
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}
|
| 279 |
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|
| 280 |
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static int a2232_set_real_termios(void *ptr)
|
| 281 |
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{
|
| 282 |
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unsigned int cflag, baud, chsize, stopb, parity, softflow;
|
| 283 |
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int rate;
|
| 284 |
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int a2232_param, a2232_cmd;
|
| 285 |
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unsigned long flags;
|
| 286 |
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unsigned int i;
|
| 287 |
|
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struct a2232_port *port = ptr;
|
| 288 |
|
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volatile struct a2232status *status;
|
| 289 |
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volatile struct a2232memory *mem;
|
| 290 |
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|
| 291 |
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if (!port->gs.tty || !port->gs.tty->termios) return 0;
|
| 292 |
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|
| 293 |
|
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status = a2232stat(port->which_a2232, port->which_port_on_a2232);
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| 294 |
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mem = a2232mem(port->which_a2232);
|
| 295 |
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| 296 |
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a2232_param = a2232_cmd = 0;
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| 297 |
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| 298 |
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// get baud rate
|
| 299 |
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baud = port->gs.baud;
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| 300 |
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if (baud == 0) {
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| 301 |
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/* speed == 0 -> drop DTR, do nothing else */
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| 302 |
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save_flags(flags);
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| 303 |
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cli();
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| 304 |
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// Clear DTR (and RTS... mhhh).
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| 305 |
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status->Command = ( (status->Command & ~A2232CMD_CMask) |
|
| 306 |
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A2232CMD_Close );
|
| 307 |
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status->OutFlush = -1;
|
| 308 |
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status->Setup = -1;
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| 309 |
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| 310 |
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restore_flags(flags);
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| 311 |
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return 0;
|
| 312 |
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}
|
| 313 |
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|
| 314 |
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rate = A2232_BAUD_TABLE_NOAVAIL;
|
| 315 |
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for (i=0; i < A2232_BAUD_TABLE_NUM_RATES * 3; i += 3){
|
| 316 |
|
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if (a2232_baud_table[i] == baud){
|
| 317 |
|
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if (mem->Common.Crystal == A2232_TURBO) rate = a2232_baud_table[i+2];
|
| 318 |
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else rate = a2232_baud_table[i+1];
|
| 319 |
|
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}
|
| 320 |
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}
|
| 321 |
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|
if (rate == A2232_BAUD_TABLE_NOAVAIL){
|
| 322 |
|
|
printk("a2232: Board %d Port %d unsupported baud rate: %d baud. Using another.\n",port->which_a2232,port->which_port_on_a2232,baud);
|
| 323 |
|
|
// This is useful for both (turbo or normal) Crystal versions.
|
| 324 |
|
|
rate = A2232PARAM_B9600;
|
| 325 |
|
|
}
|
| 326 |
|
|
a2232_param |= rate;
|
| 327 |
|
|
|
| 328 |
|
|
cflag = port->gs.tty->termios->c_cflag;
|
| 329 |
|
|
|
| 330 |
|
|
// get character size
|
| 331 |
|
|
chsize = cflag & CSIZE;
|
| 332 |
|
|
switch (chsize){
|
| 333 |
|
|
case CS8: a2232_param |= A2232PARAM_8Bit; break;
|
| 334 |
|
|
case CS7: a2232_param |= A2232PARAM_7Bit; break;
|
| 335 |
|
|
case CS6: a2232_param |= A2232PARAM_6Bit; break;
|
| 336 |
|
|
case CS5: a2232_param |= A2232PARAM_5Bit; break;
|
| 337 |
|
|
default: printk("a2232: Board %d Port %d unsupported character size: %d. Using 8 data bits.\n",
|
| 338 |
|
|
port->which_a2232,port->which_port_on_a2232,chsize);
|
| 339 |
|
|
a2232_param |= A2232PARAM_8Bit; break;
|
| 340 |
|
|
}
|
| 341 |
|
|
|
| 342 |
|
|
// get number of stop bits
|
| 343 |
|
|
stopb = cflag & CSTOPB;
|
| 344 |
|
|
if (stopb){ // two stop bits instead of one
|
| 345 |
|
|
printk("a2232: Board %d Port %d 2 stop bits unsupported. Using 1 stop bit.\n",
|
| 346 |
|
|
port->which_a2232,port->which_port_on_a2232);
|
| 347 |
|
|
}
|
| 348 |
|
|
|
| 349 |
|
|
// Warn if RTS/CTS not wanted
|
| 350 |
|
|
if (!(cflag & CRTSCTS)){
|
| 351 |
|
|
#ifndef A2232_SUPPRESS_RTSCTS_WARNING
|
| 352 |
|
|
printk("a2232: Board %d Port %d cannot switch off firmware-implemented RTS/CTS hardware flow control.\n",
|
| 353 |
|
|
port->which_a2232,port->which_port_on_a2232);
|
| 354 |
|
|
#endif
|
| 355 |
|
|
}
|
| 356 |
|
|
|
| 357 |
|
|
/* I think this is correct.
|
| 358 |
|
|
However, IXOFF means _input_ flow control and I wonder
|
| 359 |
|
|
if one should care about IXON _output_ flow control,
|
| 360 |
|
|
too. If this makes problems, one should turn the A2232
|
| 361 |
|
|
firmware XON/XOFF "SoftFlow" flow control off and use
|
| 362 |
|
|
the conventional way of inserting START/STOP characters
|
| 363 |
|
|
by hand in throttle()/unthrottle().
|
| 364 |
|
|
*/
|
| 365 |
|
|
softflow = !!( port->gs.tty->termios->c_iflag & IXOFF );
|
| 366 |
|
|
|
| 367 |
|
|
// get Parity (Enabled/Disabled? If Enabled, Odd or Even?)
|
| 368 |
|
|
parity = cflag & (PARENB | PARODD);
|
| 369 |
|
|
if (parity & PARENB){
|
| 370 |
|
|
if (parity & PARODD){
|
| 371 |
|
|
a2232_cmd |= A2232CMD_OddParity;
|
| 372 |
|
|
}
|
| 373 |
|
|
else{
|
| 374 |
|
|
a2232_cmd |= A2232CMD_EvenParity;
|
| 375 |
|
|
}
|
| 376 |
|
|
}
|
| 377 |
|
|
else a2232_cmd |= A2232CMD_NoParity;
|
| 378 |
|
|
|
| 379 |
|
|
|
| 380 |
|
|
/* Hmm. Maybe an own a2232_port structure
|
| 381 |
|
|
member would be cleaner? */
|
| 382 |
|
|
if (cflag & CLOCAL)
|
| 383 |
|
|
port->gs.flags &= ~ASYNC_CHECK_CD;
|
| 384 |
|
|
else
|
| 385 |
|
|
port->gs.flags |= ASYNC_CHECK_CD;
|
| 386 |
|
|
|
| 387 |
|
|
|
| 388 |
|
|
/* Now we have all parameters and can go to set them: */
|
| 389 |
|
|
save_flags(flags);
|
| 390 |
|
|
cli();
|
| 391 |
|
|
|
| 392 |
|
|
status->Param = a2232_param | A2232PARAM_RcvBaud;
|
| 393 |
|
|
status->Command = a2232_cmd | A2232CMD_Open | A2232CMD_Enable;
|
| 394 |
|
|
status->SoftFlow = softflow;
|
| 395 |
|
|
status->OutDisable = 0;
|
| 396 |
|
|
status->Setup = -1;
|
| 397 |
|
|
|
| 398 |
|
|
restore_flags(flags);
|
| 399 |
|
|
return 0;
|
| 400 |
|
|
}
|
| 401 |
|
|
|
| 402 |
|
|
static int a2232_chars_in_buffer(void *ptr)
|
| 403 |
|
|
{
|
| 404 |
|
|
struct a2232_port *port;
|
| 405 |
|
|
volatile struct a2232status *status;
|
| 406 |
|
|
unsigned char ret; /* we need modulo-256 arithmetics */
|
| 407 |
|
|
port = ptr;
|
| 408 |
|
|
status = a2232stat(port->which_a2232, port->which_port_on_a2232);
|
| 409 |
|
|
#if A2232_IOBUFLEN != 256
|
| 410 |
|
|
#error "Re-Implement a2232_chars_in_buffer()!"
|
| 411 |
|
|
#endif
|
| 412 |
|
|
ret = (status->OutHead - status->OutTail);
|
| 413 |
|
|
return ret;
|
| 414 |
|
|
}
|
| 415 |
|
|
|
| 416 |
|
|
static void a2232_close(void *ptr)
|
| 417 |
|
|
{
|
| 418 |
|
|
a2232_disable_tx_interrupts(ptr);
|
| 419 |
|
|
a2232_disable_rx_interrupts(ptr);
|
| 420 |
|
|
/* see the comment in a2232_shutdown_port above. */
|
| 421 |
|
|
/* MOD_DEC_USE_COUNT; */
|
| 422 |
|
|
}
|
| 423 |
|
|
|
| 424 |
|
|
static void a2232_hungup(void *ptr)
|
| 425 |
|
|
{
|
| 426 |
|
|
a2232_close(ptr);
|
| 427 |
|
|
}
|
| 428 |
|
|
/*** END OF REAL_DRIVER FUNCTIONS ***/
|
| 429 |
|
|
|
| 430 |
|
|
/*** BEGIN FUNCTIONS EXPECTED BY TTY DRIVER STRUCTS ***/
|
| 431 |
|
|
static int a2232_ioctl( struct tty_struct *tty, struct file *file,
|
| 432 |
|
|
unsigned int cmd, unsigned long arg)
|
| 433 |
|
|
{
|
| 434 |
|
|
return -ENOIOCTLCMD;
|
| 435 |
|
|
}
|
| 436 |
|
|
|
| 437 |
|
|
static void a2232_throttle(struct tty_struct *tty)
|
| 438 |
|
|
{
|
| 439 |
|
|
/* Throttle: System cannot take another chars: Drop RTS or
|
| 440 |
|
|
send the STOP char or whatever.
|
| 441 |
|
|
The A2232 firmware does RTS/CTS anyway, and XON/XOFF
|
| 442 |
|
|
if switched on. So the only thing we can do at this
|
| 443 |
|
|
layer here is not taking any characters out of the
|
| 444 |
|
|
A2232 buffer any more. */
|
| 445 |
|
|
struct a2232_port *port = (struct a2232_port *) tty->driver_data;
|
| 446 |
|
|
port->throttle_input = -1;
|
| 447 |
|
|
}
|
| 448 |
|
|
|
| 449 |
|
|
static void a2232_unthrottle(struct tty_struct *tty)
|
| 450 |
|
|
{
|
| 451 |
|
|
/* Unthrottle: dual to "throttle()" above. */
|
| 452 |
|
|
struct a2232_port *port = (struct a2232_port *) tty->driver_data;
|
| 453 |
|
|
port->throttle_input = 0;
|
| 454 |
|
|
}
|
| 455 |
|
|
|
| 456 |
|
|
static int a2232_open(struct tty_struct * tty, struct file * filp)
|
| 457 |
|
|
{
|
| 458 |
|
|
/* More or less stolen from other drivers. */
|
| 459 |
|
|
int line;
|
| 460 |
|
|
int retval;
|
| 461 |
|
|
struct a2232_port *port;
|
| 462 |
|
|
|
| 463 |
|
|
line = MINOR(tty->device);
|
| 464 |
|
|
port = &a2232_ports[line];
|
| 465 |
|
|
|
| 466 |
|
|
tty->driver_data = port;
|
| 467 |
|
|
port->gs.tty = tty;
|
| 468 |
|
|
port->gs.count++;
|
| 469 |
|
|
retval = gs_init_port(&port->gs);
|
| 470 |
|
|
if (retval) {
|
| 471 |
|
|
port->gs.count--;
|
| 472 |
|
|
return retval;
|
| 473 |
|
|
}
|
| 474 |
|
|
port->gs.flags |= GS_ACTIVE;
|
| 475 |
|
|
if (port->gs.count == 1) {
|
| 476 |
|
|
MOD_INC_USE_COUNT;
|
| 477 |
|
|
}
|
| 478 |
|
|
retval = gs_block_til_ready(port, filp);
|
| 479 |
|
|
|
| 480 |
|
|
if (retval) {
|
| 481 |
|
|
MOD_DEC_USE_COUNT;
|
| 482 |
|
|
port->gs.count--;
|
| 483 |
|
|
return retval;
|
| 484 |
|
|
}
|
| 485 |
|
|
|
| 486 |
|
|
if ((port->gs.count == 1) && (port->gs.flags & ASYNC_SPLIT_TERMIOS)){
|
| 487 |
|
|
if (tty->driver.subtype == A2232_TTY_SUBTYPE_NORMAL)
|
| 488 |
|
|
*tty->termios = port->gs.normal_termios;
|
| 489 |
|
|
else
|
| 490 |
|
|
*tty->termios = port->gs.callout_termios;
|
| 491 |
|
|
a2232_set_real_termios (port);
|
| 492 |
|
|
}
|
| 493 |
|
|
|
| 494 |
|
|
port->gs.session = current->session;
|
| 495 |
|
|
port->gs.pgrp = current->pgrp;
|
| 496 |
|
|
|
| 497 |
|
|
a2232_enable_rx_interrupts(port);
|
| 498 |
|
|
|
| 499 |
|
|
return 0;
|
| 500 |
|
|
}
|
| 501 |
|
|
/*** END OF FUNCTIONS EXPECTED BY TTY DRIVER STRUCTS ***/
|
| 502 |
|
|
|
| 503 |
|
|
static __inline__ volatile struct a2232status *a2232stat(unsigned int board, unsigned int portonboard)
|
| 504 |
|
|
{
|
| 505 |
|
|
volatile struct a2232memory *mem = a2232mem(board);
|
| 506 |
|
|
return &(mem->Status[portonboard]);
|
| 507 |
|
|
}
|
| 508 |
|
|
|
| 509 |
|
|
static __inline__ volatile struct a2232memory *a2232mem (unsigned int board)
|
| 510 |
|
|
{
|
| 511 |
|
|
return (volatile struct a2232memory *) ZTWO_VADDR( zd_a2232[board]->resource.start );
|
| 512 |
|
|
}
|
| 513 |
|
|
|
| 514 |
|
|
static __inline__ void a2232_receive_char( struct a2232_port *port,
|
| 515 |
|
|
int ch, int err )
|
| 516 |
|
|
{
|
| 517 |
|
|
/* Mostly stolen from other drivers.
|
| 518 |
|
|
Maybe one could implement a more efficient version by not only
|
| 519 |
|
|
transferring one character at a time.
|
| 520 |
|
|
*/
|
| 521 |
|
|
struct tty_struct *tty = port->gs.tty;
|
| 522 |
|
|
|
| 523 |
|
|
if (tty->flip.count >= TTY_FLIPBUF_SIZE)
|
| 524 |
|
|
return;
|
| 525 |
|
|
|
| 526 |
|
|
tty->flip.count++;
|
| 527 |
|
|
|
| 528 |
|
|
#if 0
|
| 529 |
|
|
switch(err) {
|
| 530 |
|
|
case TTY_BREAK:
|
| 531 |
|
|
break;
|
| 532 |
|
|
case TTY_PARITY:
|
| 533 |
|
|
break;
|
| 534 |
|
|
case TTY_OVERRUN:
|
| 535 |
|
|
break;
|
| 536 |
|
|
case TTY_FRAME:
|
| 537 |
|
|
break;
|
| 538 |
|
|
}
|
| 539 |
|
|
#endif
|
| 540 |
|
|
|
| 541 |
|
|
*tty->flip.flag_buf_ptr++ = err;
|
| 542 |
|
|
*tty->flip.char_buf_ptr++ = ch;
|
| 543 |
|
|
tty_flip_buffer_push(tty);
|
| 544 |
|
|
}
|
| 545 |
|
|
|
| 546 |
|
|
static void a2232_vbl_inter(int irq, void *data, struct pt_regs *fp)
|
| 547 |
|
|
{
|
| 548 |
|
|
#if A2232_IOBUFLEN != 256
|
| 549 |
|
|
#error "Re-Implement a2232_vbl_inter()!"
|
| 550 |
|
|
#endif
|
| 551 |
|
|
|
| 552 |
|
|
struct a2232_port *port;
|
| 553 |
|
|
volatile struct a2232memory *mem;
|
| 554 |
|
|
volatile struct a2232status *status;
|
| 555 |
|
|
unsigned char newhead;
|
| 556 |
|
|
unsigned char bufpos; /* Must be unsigned char. We need the modulo-256 arithmetics */
|
| 557 |
|
|
unsigned char ncd, ocd, ccd; /* names consistent with the NetBSD driver */
|
| 558 |
|
|
volatile u_char *ibuf, *cbuf, *obuf;
|
| 559 |
|
|
int ch, err, n, p;
|
| 560 |
|
|
for (n = 0; n < nr_a2232; n++){ /* for every completely initialized A2232 board */
|
| 561 |
|
|
mem = a2232mem(n);
|
| 562 |
|
|
for (p = 0; p < NUMLINES; p++){ /* for every port on this board */
|
| 563 |
|
|
err = 0;
|
| 564 |
|
|
port = &a2232_ports[n*NUMLINES+p];
|
| 565 |
|
|
if ( port->gs.flags & GS_ACTIVE ){ /* if the port is used */
|
| 566 |
|
|
|
| 567 |
|
|
status = a2232stat(n,p);
|
| 568 |
|
|
|
| 569 |
|
|
if (!port->disable_rx && !port->throttle_input){ /* If input is not disabled */
|
| 570 |
|
|
newhead = status->InHead; /* 65EC02 write pointer */
|
| 571 |
|
|
bufpos = status->InTail;
|
| 572 |
|
|
|
| 573 |
|
|
/* check for input for this port */
|
| 574 |
|
|
if (newhead != bufpos) {
|
| 575 |
|
|
/* buffer for input chars/events */
|
| 576 |
|
|
ibuf = mem->InBuf[p];
|
| 577 |
|
|
|
| 578 |
|
|
/* data types of bytes in ibuf */
|
| 579 |
|
|
cbuf = mem->InCtl[p];
|
| 580 |
|
|
|
| 581 |
|
|
/* do for all chars */
|
| 582 |
|
|
while (bufpos != newhead) {
|
| 583 |
|
|
/* which type of input data? */
|
| 584 |
|
|
switch (cbuf[bufpos]) {
|
| 585 |
|
|
/* switch on input event (CD, BREAK, etc.) */
|
| 586 |
|
|
case A2232INCTL_EVENT:
|
| 587 |
|
|
switch (ibuf[bufpos++]) {
|
| 588 |
|
|
case A2232EVENT_Break:
|
| 589 |
|
|
/* TODO: Handle BREAK signal */
|
| 590 |
|
|
break;
|
| 591 |
|
|
/* A2232EVENT_CarrierOn and A2232EVENT_CarrierOff are
|
| 592 |
|
|
handled in a separate queue and should not occur here. */
|
| 593 |
|
|
case A2232EVENT_Sync:
|
| 594 |
|
|
printk("A2232: 65EC02 software sent SYNC event, don't know what to do. Ignoring.");
|
| 595 |
|
|
break;
|
| 596 |
|
|
default:
|
| 597 |
|
|
printk("A2232: 65EC02 software broken, unknown event type %d occured.\n",ibuf[bufpos-1]);
|
| 598 |
|
|
} /* event type switch */
|
| 599 |
|
|
break;
|
| 600 |
|
|
case A2232INCTL_CHAR:
|
| 601 |
|
|
/* Receive incoming char */
|
| 602 |
|
|
a2232_receive_char(port, ibuf[bufpos], err);
|
| 603 |
|
|
bufpos++;
|
| 604 |
|
|
break;
|
| 605 |
|
|
default:
|
| 606 |
|
|
printk("A2232: 65EC02 software broken, unknown data type %d occured.\n",cbuf[bufpos]);
|
| 607 |
|
|
bufpos++;
|
| 608 |
|
|
} /* switch on input data type */
|
| 609 |
|
|
} /* while there's something in the buffer */
|
| 610 |
|
|
|
| 611 |
|
|
status->InTail = bufpos; /* tell 65EC02 what we've read */
|
| 612 |
|
|
|
| 613 |
|
|
} /* if there was something in the buffer */
|
| 614 |
|
|
} /* If input is not disabled */
|
| 615 |
|
|
|
| 616 |
|
|
/* Now check if there's something to output */
|
| 617 |
|
|
obuf = mem->OutBuf[p];
|
| 618 |
|
|
bufpos = status->OutHead;
|
| 619 |
|
|
while ( (port->gs.xmit_cnt > 0) &&
|
| 620 |
|
|
(!port->gs.tty->stopped) &&
|
| 621 |
|
|
(!port->gs.tty->hw_stopped) ){ /* While there are chars to transmit */
|
| 622 |
|
|
if (((bufpos+1) & A2232_IOBUFLENMASK) != status->OutTail) { /* If the A2232 buffer is not full */
|
| 623 |
|
|
ch = port->gs.xmit_buf[port->gs.xmit_tail]; /* get the next char to transmit */
|
| 624 |
|
|
port->gs.xmit_tail = (port->gs.xmit_tail+1) & (SERIAL_XMIT_SIZE-1); /* modulo-addition for the gs.xmit_buf ring-buffer */
|
| 625 |
|
|
obuf[bufpos++] = ch; /* put it into the A2232 buffer */
|
| 626 |
|
|
port->gs.xmit_cnt--;
|
| 627 |
|
|
}
|
| 628 |
|
|
else{ /* If A2232 the buffer is full */
|
| 629 |
|
|
break; /* simply stop filling it. */
|
| 630 |
|
|
}
|
| 631 |
|
|
}
|
| 632 |
|
|
status->OutHead = bufpos;
|
| 633 |
|
|
|
| 634 |
|
|
/* WakeUp if output buffer runs low */
|
| 635 |
|
|
if ((port->gs.xmit_cnt <= port->gs.wakeup_chars) && port->gs.tty) {
|
| 636 |
|
|
if ((port->gs.tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && port->gs.tty->ldisc.write_wakeup){
|
| 637 |
|
|
(port->gs.tty->ldisc.write_wakeup)(port->gs.tty);
|
| 638 |
|
|
}
|
| 639 |
|
|
wake_up_interruptible(&port->gs.tty->write_wait);
|
| 640 |
|
|
}
|
| 641 |
|
|
} // if the port is used
|
| 642 |
|
|
} // for every port on the board
|
| 643 |
|
|
|
| 644 |
|
|
/* Now check the CD message queue */
|
| 645 |
|
|
newhead = mem->Common.CDHead;
|
| 646 |
|
|
bufpos = mem->Common.CDTail;
|
| 647 |
|
|
if (newhead != bufpos){ /* There are CD events in queue */
|
| 648 |
|
|
ocd = mem->Common.CDStatus; /* get old status bits */
|
| 649 |
|
|
while (newhead != bufpos){ /* read all events */
|
| 650 |
|
|
ncd = mem->CDBuf[bufpos++]; /* get one event */
|
| 651 |
|
|
ccd = ncd ^ ocd; /* mask of changed lines */
|
| 652 |
|
|
ocd = ncd; /* save new status bits */
|
| 653 |
|
|
for(p=0; p < NUMLINES; p++){ /* for all ports */
|
| 654 |
|
|
if (ccd & 1){ /* this one changed */
|
| 655 |
|
|
|
| 656 |
|
|
struct a2232_port *port = &a2232_ports[n*7+p];
|
| 657 |
|
|
port->cd_status = !(ncd & 1); /* ncd&1 <=> CD is now off */
|
| 658 |
|
|
|
| 659 |
|
|
if (!(port->gs.flags & ASYNC_CHECK_CD))
|
| 660 |
|
|
; /* Don't report DCD changes */
|
| 661 |
|
|
else if (port->cd_status) { // if DCD on: DCD went UP!
|
| 662 |
|
|
if (~(port->gs.flags & ASYNC_NORMAL_ACTIVE) ||
|
| 663 |
|
|
~(port->gs.flags & ASYNC_CALLOUT_ACTIVE)) {
|
| 664 |
|
|
/* Are we blocking in open?*/
|
| 665 |
|
|
wake_up_interruptible(&port->gs.open_wait);
|
| 666 |
|
|
}
|
| 667 |
|
|
}
|
| 668 |
|
|
else { // if DCD off: DCD went DOWN!
|
| 669 |
|
|
if (!((port->gs.flags & ASYNC_CALLOUT_ACTIVE) &&
|
| 670 |
|
|
(port->gs.flags & ASYNC_CALLOUT_NOHUP))) {
|
| 671 |
|
|
if (port->gs.tty)
|
| 672 |
|
|
tty_hangup (port->gs.tty);
|
| 673 |
|
|
}
|
| 674 |
|
|
}
|
| 675 |
|
|
|
| 676 |
|
|
} // if CD changed for this port
|
| 677 |
|
|
ccd >>= 1;
|
| 678 |
|
|
ncd >>= 1; /* Shift bits for next line */
|
| 679 |
|
|
} // for every port
|
| 680 |
|
|
} // while CD events in queue
|
| 681 |
|
|
mem->Common.CDStatus = ocd; /* save new status */
|
| 682 |
|
|
mem->Common.CDTail = bufpos; /* remove events */
|
| 683 |
|
|
} // if events in CD queue
|
| 684 |
|
|
|
| 685 |
|
|
} // for every completely initialized A2232 board
|
| 686 |
|
|
}
|
| 687 |
|
|
|
| 688 |
|
|
static void a2232_init_portstructs(void)
|
| 689 |
|
|
{
|
| 690 |
|
|
struct a2232_port *port;
|
| 691 |
|
|
int i;
|
| 692 |
|
|
|
| 693 |
|
|
for (i = 0; i < MAX_A2232_BOARDS*NUMLINES; i++) {
|
| 694 |
|
|
port = a2232_ports + i;
|
| 695 |
|
|
port->which_a2232 = i/NUMLINES;
|
| 696 |
|
|
port->which_port_on_a2232 = i%NUMLINES;
|
| 697 |
|
|
port->disable_rx = port->throttle_input = port->cd_status = 0;
|
| 698 |
|
|
port->gs.callout_termios = tty_std_termios;
|
| 699 |
|
|
port->gs.normal_termios = tty_std_termios;
|
| 700 |
|
|
port->gs.magic = A2232_MAGIC;
|
| 701 |
|
|
port->gs.close_delay = HZ/2;
|
| 702 |
|
|
port->gs.closing_wait = 30 * HZ;
|
| 703 |
|
|
port->gs.rd = &a2232_real_driver;
|
| 704 |
|
|
#ifdef NEW_WRITE_LOCKING
|
| 705 |
|
|
init_MUTEX(&(port->gs.port_write_sem));
|
| 706 |
|
|
#endif
|
| 707 |
|
|
init_waitqueue_head(&port->gs.open_wait);
|
| 708 |
|
|
init_waitqueue_head(&port->gs.close_wait);
|
| 709 |
|
|
}
|
| 710 |
|
|
}
|
| 711 |
|
|
|
| 712 |
|
|
static int a2232_init_drivers(void)
|
| 713 |
|
|
{
|
| 714 |
|
|
int error;
|
| 715 |
|
|
|
| 716 |
|
|
memset(&a2232_driver, 0, sizeof(a2232_driver));
|
| 717 |
|
|
a2232_driver.magic = TTY_DRIVER_MAGIC;
|
| 718 |
|
|
a2232_driver.driver_name = "commodore_a2232";
|
| 719 |
|
|
a2232_driver.name = "ttyY";
|
| 720 |
|
|
a2232_driver.major = A2232_NORMAL_MAJOR;
|
| 721 |
|
|
a2232_driver.num = NUMLINES * nr_a2232;
|
| 722 |
|
|
a2232_driver.type = TTY_DRIVER_TYPE_SERIAL;
|
| 723 |
|
|
a2232_driver.subtype = A2232_TTY_SUBTYPE_NORMAL;
|
| 724 |
|
|
a2232_driver.init_termios = tty_std_termios;
|
| 725 |
|
|
a2232_driver.init_termios.c_cflag =
|
| 726 |
|
|
B9600 | CS8 | CREAD | HUPCL | CLOCAL;
|
| 727 |
|
|
a2232_driver.flags = TTY_DRIVER_REAL_RAW;
|
| 728 |
|
|
a2232_driver.refcount = &a2232_refcount;
|
| 729 |
|
|
a2232_driver.table = a2232_table;
|
| 730 |
|
|
a2232_driver.termios = a2232_termios;
|
| 731 |
|
|
a2232_driver.termios_locked = a2232_termios_locked;
|
| 732 |
|
|
|
| 733 |
|
|
a2232_driver.open = a2232_open;
|
| 734 |
|
|
a2232_driver.close = gs_close;
|
| 735 |
|
|
a2232_driver.write = gs_write;
|
| 736 |
|
|
a2232_driver.put_char = gs_put_char;
|
| 737 |
|
|
a2232_driver.flush_chars = gs_flush_chars;
|
| 738 |
|
|
a2232_driver.write_room = gs_write_room;
|
| 739 |
|
|
a2232_driver.chars_in_buffer = gs_chars_in_buffer;
|
| 740 |
|
|
a2232_driver.flush_buffer = gs_flush_buffer;
|
| 741 |
|
|
a2232_driver.ioctl = a2232_ioctl;
|
| 742 |
|
|
a2232_driver.throttle = a2232_throttle;
|
| 743 |
|
|
a2232_driver.unthrottle = a2232_unthrottle;
|
| 744 |
|
|
a2232_driver.set_termios = gs_set_termios;
|
| 745 |
|
|
a2232_driver.stop = gs_stop;
|
| 746 |
|
|
a2232_driver.start = gs_start;
|
| 747 |
|
|
a2232_driver.hangup = gs_hangup;
|
| 748 |
|
|
|
| 749 |
|
|
a2232_callout_driver = a2232_driver;
|
| 750 |
|
|
a2232_callout_driver.name = "cuy";
|
| 751 |
|
|
a2232_callout_driver.major = A2232_CALLOUT_MAJOR;
|
| 752 |
|
|
a2232_callout_driver.subtype = A2232_TTY_SUBTYPE_CALLOUT;
|
| 753 |
|
|
|
| 754 |
|
|
if ((error = tty_register_driver(&a2232_driver))) {
|
| 755 |
|
|
printk(KERN_ERR "A2232: Couldn't register A2232 driver, error = %d\n",
|
| 756 |
|
|
error);
|
| 757 |
|
|
return 1;
|
| 758 |
|
|
}
|
| 759 |
|
|
if ((error = tty_register_driver(&a2232_callout_driver))) {
|
| 760 |
|
|
tty_unregister_driver(&a2232_driver);
|
| 761 |
|
|
printk(KERN_ERR "A2232: Couldn't register A2232 callout driver, error = %d\n",
|
| 762 |
|
|
error);
|
| 763 |
|
|
return 1;
|
| 764 |
|
|
}
|
| 765 |
|
|
return 0;
|
| 766 |
|
|
}
|
| 767 |
|
|
|
| 768 |
|
|
int a2232board_init(void)
|
| 769 |
|
|
{
|
| 770 |
|
|
struct zorro_dev *z;
|
| 771 |
|
|
|
| 772 |
|
|
unsigned int boardaddr;
|
| 773 |
|
|
int bcount;
|
| 774 |
|
|
short start;
|
| 775 |
|
|
u_char *from;
|
| 776 |
|
|
volatile u_char *to;
|
| 777 |
|
|
volatile struct a2232memory *mem;
|
| 778 |
|
|
|
| 779 |
|
|
#ifdef CONFIG_SMP
|
| 780 |
|
|
return -ENODEV; /* This driver is not SMP aware. Is there an SMP ZorroII-bus-machine? */
|
| 781 |
|
|
#endif
|
| 782 |
|
|
|
| 783 |
|
|
if (!MACH_IS_AMIGA){
|
| 784 |
|
|
return -ENODEV;
|
| 785 |
|
|
}
|
| 786 |
|
|
|
| 787 |
|
|
printk("Commodore A2232 driver initializing.\n"); /* Say that we're alive. */
|
| 788 |
|
|
|
| 789 |
|
|
z = NULL;
|
| 790 |
|
|
nr_a2232 = 0;
|
| 791 |
|
|
while ( (z = zorro_find_device(ZORRO_WILDCARD, z)) ){
|
| 792 |
|
|
if ( (z->id != ZORRO_PROD_CBM_A2232_PROTOTYPE) &&
|
| 793 |
|
|
(z->id != ZORRO_PROD_CBM_A2232) ){
|
| 794 |
|
|
continue; // The board found was no A2232
|
| 795 |
|
|
}
|
| 796 |
|
|
if (!zorro_request_device(z,"A2232 driver"))
|
| 797 |
|
|
continue;
|
| 798 |
|
|
|
| 799 |
|
|
printk("Commodore A2232 found (#%d).\n",nr_a2232);
|
| 800 |
|
|
|
| 801 |
|
|
zd_a2232[nr_a2232] = z;
|
| 802 |
|
|
|
| 803 |
|
|
boardaddr = ZTWO_VADDR( z->resource.start );
|
| 804 |
|
|
printk("Board is located at address 0x%x, size is 0x%x.\n", boardaddr, (unsigned int) ((z->resource.end+1) - (z->resource.start)));
|
| 805 |
|
|
|
| 806 |
|
|
mem = (volatile struct a2232memory *) boardaddr;
|
| 807 |
|
|
|
| 808 |
|
|
(void) mem->Enable6502Reset; /* copy the code across to the board */
|
| 809 |
|
|
to = (u_char *)mem; from = a2232_65EC02code; bcount = sizeof(a2232_65EC02code) - 2;
|
| 810 |
|
|
start = *(short *)from;
|
| 811 |
|
|
from += sizeof(start);
|
| 812 |
|
|
to += start;
|
| 813 |
|
|
while(bcount--) *to++ = *from++;
|
| 814 |
|
|
printk("65EC02 software uploaded to the A2232 memory.\n");
|
| 815 |
|
|
|
| 816 |
|
|
mem->Common.Crystal = A2232_UNKNOWN; /* use automatic speed check */
|
| 817 |
|
|
|
| 818 |
|
|
/* start 6502 running */
|
| 819 |
|
|
(void) mem->ResetBoard;
|
| 820 |
|
|
printk("A2232's 65EC02 CPU up and running.\n");
|
| 821 |
|
|
|
| 822 |
|
|
/* wait until speed detector has finished */
|
| 823 |
|
|
for (bcount = 0; bcount < 2000; bcount++) {
|
| 824 |
|
|
udelay(1000);
|
| 825 |
|
|
if (mem->Common.Crystal)
|
| 826 |
|
|
break;
|
| 827 |
|
|
}
|
| 828 |
|
|
printk((mem->Common.Crystal?"A2232 oscillator crystal detected by 65EC02 software: ":"65EC02 software could not determine A2232 oscillator crystal: "));
|
| 829 |
|
|
switch (mem->Common.Crystal){
|
| 830 |
|
|
case A2232_UNKNOWN:
|
| 831 |
|
|
printk("Unknown crystal.\n");
|
| 832 |
|
|
break;
|
| 833 |
|
|
case A2232_NORMAL:
|
| 834 |
|
|
printk ("Normal crystal.\n");
|
| 835 |
|
|
break;
|
| 836 |
|
|
case A2232_TURBO:
|
| 837 |
|
|
printk ("Turbo crystal.\n");
|
| 838 |
|
|
break;
|
| 839 |
|
|
default:
|
| 840 |
|
|
printk ("0x%x. Huh?\n",mem->Common.Crystal);
|
| 841 |
|
|
}
|
| 842 |
|
|
|
| 843 |
|
|
nr_a2232++;
|
| 844 |
|
|
|
| 845 |
|
|
}
|
| 846 |
|
|
|
| 847 |
|
|
printk("Total: %d A2232 boards initialized.\n.", nr_a2232); /* Some status report if no card was found */
|
| 848 |
|
|
|
| 849 |
|
|
a2232_init_portstructs();
|
| 850 |
|
|
|
| 851 |
|
|
/*
|
| 852 |
|
|
a2232_init_drivers also registers the drivers. Must be here because all boards
|
| 853 |
|
|
have to be detected first.
|
| 854 |
|
|
*/
|
| 855 |
|
|
if (a2232_init_drivers()) return -ENODEV; // maybe we should use a different -Exxx?
|
| 856 |
|
|
|
| 857 |
|
|
request_irq(IRQ_AMIGA_VERTB, a2232_vbl_inter, 0, "A2232 serial VBL", a2232_driver_ID);
|
| 858 |
|
|
return 0;
|
| 859 |
|
|
}
|
| 860 |
|
|
|
| 861 |
|
|
#ifdef MODULE
|
| 862 |
|
|
int init_module(void)
|
| 863 |
|
|
{
|
| 864 |
|
|
return a2232board_init();
|
| 865 |
|
|
}
|
| 866 |
|
|
|
| 867 |
|
|
void cleanup_module(void)
|
| 868 |
|
|
{
|
| 869 |
|
|
int i;
|
| 870 |
|
|
|
| 871 |
|
|
for (i = 0; i < nr_a2232; i++) {
|
| 872 |
|
|
zorro_release_device(zd_a2232[i]);
|
| 873 |
|
|
}
|
| 874 |
|
|
|
| 875 |
|
|
tty_unregister_driver(&a2232_driver);
|
| 876 |
|
|
tty_unregister_driver(&a2232_callout_driver);
|
| 877 |
|
|
free_irq(IRQ_AMIGA_VERTB, a2232_driver_ID);
|
| 878 |
|
|
}
|
| 879 |
|
|
#endif
|
| 880 |
|
|
/***************************** End of Functions *********************/
|
| 881 |
|
|
|
| 882 |
|
|
MODULE_AUTHOR("Enver Haase");
|
| 883 |
|
|
MODULE_DESCRIPTION("Amiga A2232 multi-serial board driver");
|
| 884 |
|
|
MODULE_LICENSE("GPL");
|
