Linux-2.6.12-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!
This commit is contained in:
Linus Torvalds
825
drivers/char/ser_a2232.c
Normal file
825
drivers/char/ser_a2232.c
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@@ -0,0 +1,825 @@
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/* drivers/char/ser_a2232.c */
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/* $Id: ser_a2232.c,v 0.4 2000/01/25 12:00:00 ehaase 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
|
||||
* 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
|
||||
* GNU General Public License for more details.
|
||||
*
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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 <linux/tty.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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/* The interrupt service routine */
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static irqreturn_t 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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/* 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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/* 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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/* Helper functions */
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static inline volatile struct a2232memory *a2232mem(unsigned int board)
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{
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return (volatile struct a2232memory *)ZTWO_VADDR(zd_a2232[board]->resource.start);
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}
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static inline volatile struct a2232status *a2232stat(unsigned int board,
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unsigned int portonboard)
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{
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volatile struct a2232memory *mem = a2232mem(board);
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return &(mem->Status[portonboard]);
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}
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static inline void a2232_receive_char(struct a2232_port *port, int ch, int err)
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{
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/* Mostly stolen from other drivers.
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Maybe one could implement a more efficient version by not only
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transferring one character at a time.
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*/
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struct tty_struct *tty = port->gs.tty;
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if (tty->flip.count >= TTY_FLIPBUF_SIZE)
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return;
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tty->flip.count++;
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#if 0
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switch(err) {
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case TTY_BREAK:
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break;
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case TTY_PARITY:
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break;
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case TTY_OVERRUN:
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break;
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case TTY_FRAME:
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break;
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}
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#endif
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*tty->flip.flag_buf_ptr++ = err;
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*tty->flip.char_buf_ptr++ = ch;
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tty_flip_buffer_push(tty);
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}
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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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local_irq_save(flags);
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port->gs.flags &= ~GS_TX_INTEN;
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local_irq_restore(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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local_irq_save(flags);
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port->gs.flags |= GS_TX_INTEN;
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local_irq_restore(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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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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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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local_irq_save(flags);
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port->gs.flags &= ~GS_ACTIVE;
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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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A2232CMD_Close );
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stat->OutFlush = -1;
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stat->Setup = -1;
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}
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local_irq_restore(flags);
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/* After analyzing control flow, I think a2232_shutdown_port
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is actually the last call from the system when at application
|
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level someone issues a "echo Hello >>/dev/ttyY0".
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Therefore I think the MOD_DEC_USE_COUNT should be here and
|
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not in "a2232_close()". See the comment in "sx.c", too.
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If you run into problems, compile this driver into the
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kernel instead of compiling it as a module. */
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}
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static int a2232_set_real_termios(void *ptr)
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{
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unsigned int cflag, baud, chsize, stopb, parity, softflow;
|
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int rate;
|
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int a2232_param, a2232_cmd;
|
||||
unsigned long flags;
|
||||
unsigned int i;
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||||
struct a2232_port *port = ptr;
|
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volatile struct a2232status *status;
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volatile struct a2232memory *mem;
|
||||
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||||
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);
|
||||
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||||
a2232_param = a2232_cmd = 0;
|
||||
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// get baud rate
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baud = port->gs.baud;
|
||||
if (baud == 0) {
|
||||
/* speed == 0 -> drop DTR, do nothing else */
|
||||
local_irq_save(flags);
|
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// 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");
|
||||
Reference in New Issue
Block a user