![Alan Cox](/assets/img/avatar_default.png)
This is the grungy swap all the occurrences in the right places patch that goes with the updates. At this point we have the same functionality as before (except that sgttyb() returns speeds not zero) and are ready to begin turning new stuff on providing nobody reports lots of bugs If you are a tty driver author converting an out of tree driver the only impact should be termios->ktermios name changes for the speed/property setting functions from your upper layers. If you are implementing your own TCGETS function before then your driver was broken already and its about to get a whole lot more painful for you so please fix it 8) Also fill in c_ispeed/ospeed on init for most devices, although the current code will do this for you anyway but I'd like eventually to lose that extra paranoia [akpm@osdl.org: bluetooth fix] [mp3@de.ibm.com: sclp fix] [mp3@de.ibm.com: warning fix for tty3270] [hugh@veritas.com: fix tty_ioctl powerpc build] [jdike@addtoit.com: uml: fix ->set_termios declaration] Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Martin Peschke <mp3@de.ibm.com> Acked-by: Peter Oberparleiter <oberpar@de.ibm.com> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
816 lines
20 KiB
C
816 lines
20 KiB
C
/*
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* dz.c: Serial port driver for DECstations equipped
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* with the DZ chipset.
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*
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* Copyright (C) 1998 Olivier A. D. Lebaillif
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*
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* Email: olivier.lebaillif@ifrsys.com
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*
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* Copyright (C) 2004, 2006 Maciej W. Rozycki
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*
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* [31-AUG-98] triemer
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* Changed IRQ to use Harald's dec internals interrupts.h
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* removed base_addr code - moving address assignment to setup.c
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* Changed name of dz_init to rs_init to be consistent with tc code
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* [13-NOV-98] triemer fixed code to receive characters
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* after patches by harald to irq code.
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* [09-JAN-99] triemer minor fix for schedule - due to removal of timeout
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* field from "current" - somewhere between 2.1.121 and 2.1.131
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Qua Jun 27 15:02:26 BRT 2001
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* [27-JUN-2001] Arnaldo Carvalho de Melo <acme@conectiva.com.br> - cleanups
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*
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* Parts (C) 1999 David Airlie, airlied@linux.ie
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* [07-SEP-99] Bugfixes
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*
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* [06-Jan-2002] Russell King <rmk@arm.linux.org.uk>
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* Converted to new serial core
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*/
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#undef DEBUG_DZ
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#if defined(CONFIG_SERIAL_DZ_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
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#define SUPPORT_SYSRQ
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#endif
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/console.h>
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#include <linux/sysrq.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/serial_core.h>
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#include <linux/serial.h>
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#include <asm/bootinfo.h>
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#include <asm/dec/interrupts.h>
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#include <asm/dec/kn01.h>
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#include <asm/dec/kn02.h>
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#include <asm/dec/machtype.h>
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#include <asm/dec/prom.h>
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#include <asm/irq.h>
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#include <asm/system.h>
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#include <asm/uaccess.h>
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#include "dz.h"
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static char *dz_name = "DECstation DZ serial driver version ";
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static char *dz_version = "1.03";
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struct dz_port {
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struct uart_port port;
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unsigned int cflag;
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};
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static struct dz_port dz_ports[DZ_NB_PORT];
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/*
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* ------------------------------------------------------------
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* dz_in () and dz_out ()
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*
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* These routines are used to access the registers of the DZ
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* chip, hiding relocation differences between implementation.
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* ------------------------------------------------------------
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*/
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static inline unsigned short dz_in(struct dz_port *dport, unsigned offset)
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{
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volatile unsigned short *addr =
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(volatile unsigned short *) (dport->port.membase + offset);
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return *addr;
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}
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static inline void dz_out(struct dz_port *dport, unsigned offset,
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unsigned short value)
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{
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volatile unsigned short *addr =
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(volatile unsigned short *) (dport->port.membase + offset);
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*addr = value;
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}
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/*
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* ------------------------------------------------------------
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* rs_stop () and rs_start ()
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*
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* These routines are called before setting or resetting
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* tty->stopped. They enable or disable transmitter interrupts,
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* as necessary.
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* ------------------------------------------------------------
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*/
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static void dz_stop_tx(struct uart_port *uport)
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{
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struct dz_port *dport = (struct dz_port *)uport;
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unsigned short tmp, mask = 1 << dport->port.line;
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unsigned long flags;
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spin_lock_irqsave(&dport->port.lock, flags);
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tmp = dz_in(dport, DZ_TCR); /* read the TX flag */
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tmp &= ~mask; /* clear the TX flag */
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dz_out(dport, DZ_TCR, tmp);
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spin_unlock_irqrestore(&dport->port.lock, flags);
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}
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static void dz_start_tx(struct uart_port *uport)
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{
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struct dz_port *dport = (struct dz_port *)uport;
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unsigned short tmp, mask = 1 << dport->port.line;
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unsigned long flags;
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spin_lock_irqsave(&dport->port.lock, flags);
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tmp = dz_in(dport, DZ_TCR); /* read the TX flag */
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tmp |= mask; /* set the TX flag */
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dz_out(dport, DZ_TCR, tmp);
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spin_unlock_irqrestore(&dport->port.lock, flags);
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}
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static void dz_stop_rx(struct uart_port *uport)
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{
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struct dz_port *dport = (struct dz_port *)uport;
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unsigned long flags;
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spin_lock_irqsave(&dport->port.lock, flags);
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dport->cflag &= ~DZ_CREAD;
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dz_out(dport, DZ_LPR, dport->cflag | dport->port.line);
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spin_unlock_irqrestore(&dport->port.lock, flags);
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}
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static void dz_enable_ms(struct uart_port *port)
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{
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/* nothing to do */
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}
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/*
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* ------------------------------------------------------------
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*
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* Here start the interrupt handling routines. All of the following
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* subroutines are declared as inline and are folded into
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* dz_interrupt. They were separated out for readability's sake.
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*
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* Note: dz_interrupt() is a "fast" interrupt, which means that it
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* runs with interrupts turned off. People who may want to modify
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* dz_interrupt() should try to keep the interrupt handler as fast as
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* possible. After you are done making modifications, it is not a bad
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* idea to do:
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*
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* make drivers/serial/dz.s
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*
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* and look at the resulting assemble code in dz.s.
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*
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* ------------------------------------------------------------
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*/
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/*
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* ------------------------------------------------------------
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* receive_char ()
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*
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* This routine deals with inputs from any lines.
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* ------------------------------------------------------------
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*/
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static inline void dz_receive_chars(struct dz_port *dport_in,
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struct pt_regs *regs)
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{
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struct dz_port *dport;
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struct tty_struct *tty = NULL;
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struct uart_icount *icount;
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int lines_rx[DZ_NB_PORT] = { [0 ... DZ_NB_PORT - 1] = 0 };
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unsigned short status;
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unsigned char ch, flag;
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int i;
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while ((status = dz_in(dport_in, DZ_RBUF)) & DZ_DVAL) {
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dport = &dz_ports[LINE(status)];
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tty = dport->port.info->tty; /* point to the proper dev */
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ch = UCHAR(status); /* grab the char */
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icount = &dport->port.icount;
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icount->rx++;
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flag = TTY_NORMAL;
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if (status & DZ_FERR) { /* frame error */
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/*
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* There is no separate BREAK status bit, so
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* treat framing errors as BREAKs for Magic SysRq
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* and SAK; normally, otherwise.
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*/
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if (uart_handle_break(&dport->port))
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continue;
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if (dport->port.flags & UPF_SAK)
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flag = TTY_BREAK;
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else
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flag = TTY_FRAME;
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} else if (status & DZ_OERR) /* overrun error */
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flag = TTY_OVERRUN;
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else if (status & DZ_PERR) /* parity error */
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flag = TTY_PARITY;
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/* keep track of the statistics */
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switch (flag) {
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case TTY_FRAME:
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icount->frame++;
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break;
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case TTY_PARITY:
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icount->parity++;
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break;
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case TTY_OVERRUN:
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icount->overrun++;
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break;
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case TTY_BREAK:
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icount->brk++;
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break;
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default:
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break;
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}
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if (uart_handle_sysrq_char(&dport->port, ch, regs))
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continue;
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if ((status & dport->port.ignore_status_mask) == 0) {
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uart_insert_char(&dport->port,
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status, DZ_OERR, ch, flag);
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lines_rx[LINE(status)] = 1;
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}
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}
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for (i = 0; i < DZ_NB_PORT; i++)
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if (lines_rx[i])
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tty_flip_buffer_push(dz_ports[i].port.info->tty);
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}
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/*
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* ------------------------------------------------------------
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* transmit_char ()
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*
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* This routine deals with outputs to any lines.
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* ------------------------------------------------------------
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*/
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static inline void dz_transmit_chars(struct dz_port *dport_in)
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{
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struct dz_port *dport;
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struct circ_buf *xmit;
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unsigned short status;
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unsigned char tmp;
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status = dz_in(dport_in, DZ_CSR);
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dport = &dz_ports[LINE(status)];
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xmit = &dport->port.info->xmit;
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if (dport->port.x_char) { /* XON/XOFF chars */
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dz_out(dport, DZ_TDR, dport->port.x_char);
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dport->port.icount.tx++;
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dport->port.x_char = 0;
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return;
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}
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/* If nothing to do or stopped or hardware stopped. */
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if (uart_circ_empty(xmit) || uart_tx_stopped(&dport->port)) {
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dz_stop_tx(&dport->port);
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return;
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}
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/*
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* If something to do... (remember the dz has no output fifo,
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* so we go one char at a time) :-<
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*/
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tmp = xmit->buf[xmit->tail];
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xmit->tail = (xmit->tail + 1) & (DZ_XMIT_SIZE - 1);
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dz_out(dport, DZ_TDR, tmp);
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dport->port.icount.tx++;
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if (uart_circ_chars_pending(xmit) < DZ_WAKEUP_CHARS)
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uart_write_wakeup(&dport->port);
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/* Are we are done. */
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if (uart_circ_empty(xmit))
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dz_stop_tx(&dport->port);
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}
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/*
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* ------------------------------------------------------------
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* check_modem_status()
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*
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* DS 3100 & 5100: Only valid for the MODEM line, duh!
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* DS 5000/200: Valid for the MODEM and PRINTER line.
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* ------------------------------------------------------------
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*/
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static inline void check_modem_status(struct dz_port *dport)
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{
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/*
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* FIXME:
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* 1. No status change interrupt; use a timer.
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* 2. Handle the 3100/5000 as appropriate. --macro
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*/
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unsigned short status;
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/* If not the modem line just return. */
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if (dport->port.line != DZ_MODEM)
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return;
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status = dz_in(dport, DZ_MSR);
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/* it's easy, since DSR2 is the only bit in the register */
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if (status)
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dport->port.icount.dsr++;
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}
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/*
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* ------------------------------------------------------------
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* dz_interrupt ()
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*
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* this is the main interrupt routine for the DZ chip.
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* It deals with the multiple ports.
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* ------------------------------------------------------------
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*/
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static irqreturn_t dz_interrupt(int irq, void *dev)
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{
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struct dz_port *dport = (struct dz_port *)dev;
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unsigned short status;
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/* get the reason why we just got an irq */
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status = dz_in(dport, DZ_CSR);
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if ((status & (DZ_RDONE | DZ_RIE)) == (DZ_RDONE | DZ_RIE))
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dz_receive_chars(dport, regs);
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if ((status & (DZ_TRDY | DZ_TIE)) == (DZ_TRDY | DZ_TIE))
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dz_transmit_chars(dport);
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return IRQ_HANDLED;
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}
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/*
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* -------------------------------------------------------------------
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* Here ends the DZ interrupt routines.
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* -------------------------------------------------------------------
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*/
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static unsigned int dz_get_mctrl(struct uart_port *uport)
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{
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/*
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* FIXME: Handle the 3100/5000 as appropriate. --macro
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*/
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struct dz_port *dport = (struct dz_port *)uport;
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unsigned int mctrl = TIOCM_CAR | TIOCM_DSR | TIOCM_CTS;
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if (dport->port.line == DZ_MODEM) {
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if (dz_in(dport, DZ_MSR) & DZ_MODEM_DSR)
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mctrl &= ~TIOCM_DSR;
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}
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return mctrl;
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}
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static void dz_set_mctrl(struct uart_port *uport, unsigned int mctrl)
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{
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/*
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* FIXME: Handle the 3100/5000 as appropriate. --macro
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*/
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struct dz_port *dport = (struct dz_port *)uport;
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unsigned short tmp;
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if (dport->port.line == DZ_MODEM) {
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tmp = dz_in(dport, DZ_TCR);
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if (mctrl & TIOCM_DTR)
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tmp &= ~DZ_MODEM_DTR;
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else
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tmp |= DZ_MODEM_DTR;
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dz_out(dport, DZ_TCR, tmp);
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}
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}
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/*
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* -------------------------------------------------------------------
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* startup ()
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*
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* various initialization tasks
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* -------------------------------------------------------------------
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*/
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static int dz_startup(struct uart_port *uport)
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{
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struct dz_port *dport = (struct dz_port *)uport;
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unsigned long flags;
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unsigned short tmp;
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spin_lock_irqsave(&dport->port.lock, flags);
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/* enable the interrupt and the scanning */
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tmp = dz_in(dport, DZ_CSR);
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tmp |= DZ_RIE | DZ_TIE | DZ_MSE;
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dz_out(dport, DZ_CSR, tmp);
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spin_unlock_irqrestore(&dport->port.lock, flags);
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return 0;
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}
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/*
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* -------------------------------------------------------------------
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* shutdown ()
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*
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* This routine will shutdown a serial port; interrupts are disabled, and
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* DTR is dropped if the hangup on close termio flag is on.
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* -------------------------------------------------------------------
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*/
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static void dz_shutdown(struct uart_port *uport)
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{
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dz_stop_tx(uport);
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}
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/*
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* -------------------------------------------------------------------
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* dz_tx_empty() -- get the transmitter empty status
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*
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* Purpose: Let user call ioctl() to get info when the UART physically
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* is emptied. On bus types like RS485, the transmitter must
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* release the bus after transmitting. This must be done when
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* the transmit shift register is empty, not be done when the
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* transmit holding register is empty. This functionality
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* allows an RS485 driver to be written in user space.
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* -------------------------------------------------------------------
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*/
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static unsigned int dz_tx_empty(struct uart_port *uport)
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{
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struct dz_port *dport = (struct dz_port *)uport;
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unsigned short tmp, mask = 1 << dport->port.line;
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tmp = dz_in(dport, DZ_TCR);
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tmp &= mask;
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return tmp ? 0 : TIOCSER_TEMT;
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}
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static void dz_break_ctl(struct uart_port *uport, int break_state)
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{
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/*
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* FIXME: Can't access BREAK bits in TDR easily;
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* reuse the code for polled TX. --macro
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*/
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struct dz_port *dport = (struct dz_port *)uport;
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unsigned long flags;
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unsigned short tmp, mask = 1 << dport->port.line;
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spin_lock_irqsave(&uport->lock, flags);
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tmp = dz_in(dport, DZ_TCR);
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if (break_state)
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tmp |= mask;
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else
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tmp &= ~mask;
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dz_out(dport, DZ_TCR, tmp);
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spin_unlock_irqrestore(&uport->lock, flags);
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}
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static void dz_set_termios(struct uart_port *uport, struct ktermios *termios,
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struct ktermios *old_termios)
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{
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struct dz_port *dport = (struct dz_port *)uport;
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unsigned long flags;
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unsigned int cflag, baud;
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cflag = dport->port.line;
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switch (termios->c_cflag & CSIZE) {
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case CS5:
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cflag |= DZ_CS5;
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break;
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case CS6:
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cflag |= DZ_CS6;
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break;
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case CS7:
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cflag |= DZ_CS7;
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break;
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case CS8:
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default:
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cflag |= DZ_CS8;
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}
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if (termios->c_cflag & CSTOPB)
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cflag |= DZ_CSTOPB;
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if (termios->c_cflag & PARENB)
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cflag |= DZ_PARENB;
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if (termios->c_cflag & PARODD)
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cflag |= DZ_PARODD;
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baud = uart_get_baud_rate(uport, termios, old_termios, 50, 9600);
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switch (baud) {
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case 50:
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cflag |= DZ_B50;
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break;
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case 75:
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cflag |= DZ_B75;
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break;
|
|
case 110:
|
|
cflag |= DZ_B110;
|
|
break;
|
|
case 134:
|
|
cflag |= DZ_B134;
|
|
break;
|
|
case 150:
|
|
cflag |= DZ_B150;
|
|
break;
|
|
case 300:
|
|
cflag |= DZ_B300;
|
|
break;
|
|
case 600:
|
|
cflag |= DZ_B600;
|
|
break;
|
|
case 1200:
|
|
cflag |= DZ_B1200;
|
|
break;
|
|
case 1800:
|
|
cflag |= DZ_B1800;
|
|
break;
|
|
case 2000:
|
|
cflag |= DZ_B2000;
|
|
break;
|
|
case 2400:
|
|
cflag |= DZ_B2400;
|
|
break;
|
|
case 3600:
|
|
cflag |= DZ_B3600;
|
|
break;
|
|
case 4800:
|
|
cflag |= DZ_B4800;
|
|
break;
|
|
case 7200:
|
|
cflag |= DZ_B7200;
|
|
break;
|
|
case 9600:
|
|
default:
|
|
cflag |= DZ_B9600;
|
|
}
|
|
|
|
if (termios->c_cflag & CREAD)
|
|
cflag |= DZ_RXENAB;
|
|
|
|
spin_lock_irqsave(&dport->port.lock, flags);
|
|
|
|
dz_out(dport, DZ_LPR, cflag | dport->port.line);
|
|
dport->cflag = cflag;
|
|
|
|
/* setup accept flag */
|
|
dport->port.read_status_mask = DZ_OERR;
|
|
if (termios->c_iflag & INPCK)
|
|
dport->port.read_status_mask |= DZ_FERR | DZ_PERR;
|
|
|
|
/* characters to ignore */
|
|
uport->ignore_status_mask = 0;
|
|
if (termios->c_iflag & IGNPAR)
|
|
dport->port.ignore_status_mask |= DZ_FERR | DZ_PERR;
|
|
|
|
spin_unlock_irqrestore(&dport->port.lock, flags);
|
|
}
|
|
|
|
static const char *dz_type(struct uart_port *port)
|
|
{
|
|
return "DZ";
|
|
}
|
|
|
|
static void dz_release_port(struct uart_port *port)
|
|
{
|
|
/* nothing to do */
|
|
}
|
|
|
|
static int dz_request_port(struct uart_port *port)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void dz_config_port(struct uart_port *port, int flags)
|
|
{
|
|
if (flags & UART_CONFIG_TYPE)
|
|
port->type = PORT_DZ;
|
|
}
|
|
|
|
/*
|
|
* verify the new serial_struct (for TIOCSSERIAL).
|
|
*/
|
|
static int dz_verify_port(struct uart_port *port, struct serial_struct *ser)
|
|
{
|
|
int ret = 0;
|
|
if (ser->type != PORT_UNKNOWN && ser->type != PORT_DZ)
|
|
ret = -EINVAL;
|
|
if (ser->irq != port->irq)
|
|
ret = -EINVAL;
|
|
return ret;
|
|
}
|
|
|
|
static struct uart_ops dz_ops = {
|
|
.tx_empty = dz_tx_empty,
|
|
.get_mctrl = dz_get_mctrl,
|
|
.set_mctrl = dz_set_mctrl,
|
|
.stop_tx = dz_stop_tx,
|
|
.start_tx = dz_start_tx,
|
|
.stop_rx = dz_stop_rx,
|
|
.enable_ms = dz_enable_ms,
|
|
.break_ctl = dz_break_ctl,
|
|
.startup = dz_startup,
|
|
.shutdown = dz_shutdown,
|
|
.set_termios = dz_set_termios,
|
|
.type = dz_type,
|
|
.release_port = dz_release_port,
|
|
.request_port = dz_request_port,
|
|
.config_port = dz_config_port,
|
|
.verify_port = dz_verify_port,
|
|
};
|
|
|
|
static void __init dz_init_ports(void)
|
|
{
|
|
static int first = 1;
|
|
struct dz_port *dport;
|
|
unsigned long base;
|
|
int i;
|
|
|
|
if (!first)
|
|
return;
|
|
first = 0;
|
|
|
|
if (mips_machtype == MACH_DS23100 ||
|
|
mips_machtype == MACH_DS5100)
|
|
base = CKSEG1ADDR(KN01_SLOT_BASE + KN01_DZ11);
|
|
else
|
|
base = CKSEG1ADDR(KN02_SLOT_BASE + KN02_DZ11);
|
|
|
|
for (i = 0, dport = dz_ports; i < DZ_NB_PORT; i++, dport++) {
|
|
spin_lock_init(&dport->port.lock);
|
|
dport->port.membase = (char *) base;
|
|
dport->port.iotype = UPIO_MEM;
|
|
dport->port.irq = dec_interrupt[DEC_IRQ_DZ11];
|
|
dport->port.line = i;
|
|
dport->port.fifosize = 1;
|
|
dport->port.ops = &dz_ops;
|
|
dport->port.flags = UPF_BOOT_AUTOCONF;
|
|
}
|
|
}
|
|
|
|
static void dz_reset(struct dz_port *dport)
|
|
{
|
|
dz_out(dport, DZ_CSR, DZ_CLR);
|
|
while (dz_in(dport, DZ_CSR) & DZ_CLR);
|
|
iob();
|
|
|
|
/* enable scanning */
|
|
dz_out(dport, DZ_CSR, DZ_MSE);
|
|
}
|
|
|
|
#ifdef CONFIG_SERIAL_DZ_CONSOLE
|
|
/*
|
|
* -------------------------------------------------------------------
|
|
* dz_console_putchar() -- transmit a character
|
|
*
|
|
* Polled transmission. This is tricky. We need to mask transmit
|
|
* interrupts so that they do not interfere, enable the transmitter
|
|
* for the line requested and then wait till the transmit scanner
|
|
* requests data for this line. But it may request data for another
|
|
* line first, in which case we have to disable its transmitter and
|
|
* repeat waiting till our line pops up. Only then the character may
|
|
* be transmitted. Finally, the state of the transmitter mask is
|
|
* restored. Welcome to the world of PDP-11!
|
|
* -------------------------------------------------------------------
|
|
*/
|
|
static void dz_console_putchar(struct uart_port *uport, int ch)
|
|
{
|
|
struct dz_port *dport = (struct dz_port *)uport;
|
|
unsigned long flags;
|
|
unsigned short csr, tcr, trdy, mask;
|
|
int loops = 10000;
|
|
|
|
spin_lock_irqsave(&dport->port.lock, flags);
|
|
csr = dz_in(dport, DZ_CSR);
|
|
dz_out(dport, DZ_CSR, csr & ~DZ_TIE);
|
|
tcr = dz_in(dport, DZ_TCR);
|
|
tcr |= 1 << dport->port.line;
|
|
mask = tcr;
|
|
dz_out(dport, DZ_TCR, mask);
|
|
iob();
|
|
spin_unlock_irqrestore(&dport->port.lock, flags);
|
|
|
|
while (loops--) {
|
|
trdy = dz_in(dport, DZ_CSR);
|
|
if (!(trdy & DZ_TRDY))
|
|
continue;
|
|
trdy = (trdy & DZ_TLINE) >> 8;
|
|
if (trdy == dport->port.line)
|
|
break;
|
|
mask &= ~(1 << trdy);
|
|
dz_out(dport, DZ_TCR, mask);
|
|
iob();
|
|
udelay(2);
|
|
}
|
|
|
|
if (loops) /* Cannot send otherwise. */
|
|
dz_out(dport, DZ_TDR, ch);
|
|
|
|
dz_out(dport, DZ_TCR, tcr);
|
|
dz_out(dport, DZ_CSR, csr);
|
|
}
|
|
|
|
/*
|
|
* -------------------------------------------------------------------
|
|
* dz_console_print ()
|
|
*
|
|
* dz_console_print is registered for printk.
|
|
* The console must be locked when we get here.
|
|
* -------------------------------------------------------------------
|
|
*/
|
|
static void dz_console_print(struct console *co,
|
|
const char *str,
|
|
unsigned int count)
|
|
{
|
|
struct dz_port *dport = &dz_ports[co->index];
|
|
#ifdef DEBUG_DZ
|
|
prom_printf((char *) str);
|
|
#endif
|
|
uart_console_write(&dport->port, str, count, dz_console_putchar);
|
|
}
|
|
|
|
static int __init dz_console_setup(struct console *co, char *options)
|
|
{
|
|
struct dz_port *dport = &dz_ports[co->index];
|
|
int baud = 9600;
|
|
int bits = 8;
|
|
int parity = 'n';
|
|
int flow = 'n';
|
|
|
|
if (options)
|
|
uart_parse_options(options, &baud, &parity, &bits, &flow);
|
|
|
|
dz_reset(dport);
|
|
|
|
return uart_set_options(&dport->port, co, baud, parity, bits, flow);
|
|
}
|
|
|
|
static struct uart_driver dz_reg;
|
|
static struct console dz_sercons = {
|
|
.name = "ttyS",
|
|
.write = dz_console_print,
|
|
.device = uart_console_device,
|
|
.setup = dz_console_setup,
|
|
.flags = CON_PRINTBUFFER,
|
|
.index = -1,
|
|
.data = &dz_reg,
|
|
};
|
|
|
|
static int __init dz_serial_console_init(void)
|
|
{
|
|
if (!IOASIC) {
|
|
dz_init_ports();
|
|
register_console(&dz_sercons);
|
|
return 0;
|
|
} else
|
|
return -ENXIO;
|
|
}
|
|
|
|
console_initcall(dz_serial_console_init);
|
|
|
|
#define SERIAL_DZ_CONSOLE &dz_sercons
|
|
#else
|
|
#define SERIAL_DZ_CONSOLE NULL
|
|
#endif /* CONFIG_SERIAL_DZ_CONSOLE */
|
|
|
|
static struct uart_driver dz_reg = {
|
|
.owner = THIS_MODULE,
|
|
.driver_name = "serial",
|
|
.dev_name = "ttyS",
|
|
.major = TTY_MAJOR,
|
|
.minor = 64,
|
|
.nr = DZ_NB_PORT,
|
|
.cons = SERIAL_DZ_CONSOLE,
|
|
};
|
|
|
|
static int __init dz_init(void)
|
|
{
|
|
int ret, i;
|
|
|
|
if (IOASIC)
|
|
return -ENXIO;
|
|
|
|
printk("%s%s\n", dz_name, dz_version);
|
|
|
|
dz_init_ports();
|
|
|
|
#ifndef CONFIG_SERIAL_DZ_CONSOLE
|
|
/* reset the chip */
|
|
dz_reset(&dz_ports[0]);
|
|
#endif
|
|
|
|
if (request_irq(dz_ports[0].port.irq, dz_interrupt,
|
|
IRQF_DISABLED, "DZ", &dz_ports[0]))
|
|
panic("Unable to register DZ interrupt");
|
|
|
|
ret = uart_register_driver(&dz_reg);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
for (i = 0; i < DZ_NB_PORT; i++)
|
|
uart_add_one_port(&dz_reg, &dz_ports[i].port);
|
|
|
|
return ret;
|
|
}
|
|
|
|
module_init(dz_init);
|
|
|
|
MODULE_DESCRIPTION("DECstation DZ serial driver");
|
|
MODULE_LICENSE("GPL");
|