12d984b608
been abandoned in favor of a (device) name-based approach. Submitted by: phk Tested on: alpha
576 lines
14 KiB
C
576 lines
14 KiB
C
/*
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* Copyright (c) 2003 Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/cons.h>
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#include <sys/fcntl.h>
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#include <sys/interrupt.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/reboot.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <sys/termios.h>
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#include <sys/tty.h>
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#include <machine/resource.h>
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#include <machine/stdarg.h>
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#include <dev/uart/uart.h>
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#include <dev/uart/uart_bus.h>
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#include <dev/uart/uart_cpu.h>
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#include "uart_if.h"
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#define UART_MINOR_CALLOUT 0x10000
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static cn_probe_t uart_cnprobe;
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static cn_init_t uart_cninit;
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static cn_term_t uart_cnterm;
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static cn_getc_t uart_cngetc;
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static cn_checkc_t uart_cncheckc;
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static cn_putc_t uart_cnputc;
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CONS_DRIVER(uart, uart_cnprobe, uart_cninit, uart_cnterm, uart_cngetc,
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uart_cncheckc, uart_cnputc, NULL);
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static d_open_t uart_tty_open;
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static d_close_t uart_tty_close;
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static d_ioctl_t uart_tty_ioctl;
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static struct cdevsw uart_cdevsw = {
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.d_open = uart_tty_open,
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.d_close = uart_tty_close,
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.d_read = ttyread,
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.d_write = ttywrite,
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.d_ioctl = uart_tty_ioctl,
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.d_poll = ttypoll,
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.d_name = uart_driver_name,
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.d_maj = MAJOR_AUTO,
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.d_flags = D_TTY,
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.d_kqfilter = ttykqfilter,
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};
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static struct uart_devinfo uart_console;
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static void
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uart_cnprobe(struct consdev *cp)
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{
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cp->cn_pri = CN_DEAD;
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KASSERT(uart_console.cookie == NULL, ("foo"));
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if (uart_cpu_getdev(UART_DEV_CONSOLE, &uart_console))
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return;
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if (uart_probe(&uart_console))
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return;
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cp->cn_pri = (boothowto & RB_SERIAL) ? CN_REMOTE : CN_NORMAL;
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cp->cn_arg = &uart_console;
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}
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static void
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uart_cninit(struct consdev *cp)
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{
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struct uart_devinfo *di;
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/*
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* Yedi trick: we need to be able to define cn_dev before we go
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* single- or multi-user. The problem is that we don't know at
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* this time what the device will be. Hence, we need to link from
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* the uart_devinfo to the consdev that corresponds to it so that
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* we can define cn_dev in uart_bus_attach() when we find the
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* device during bus enumeration. That's when we'll know what the
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* the unit number will be.
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*/
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di = cp->cn_arg;
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KASSERT(di->cookie == NULL, ("foo"));
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di->cookie = cp;
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di->type = UART_DEV_CONSOLE;
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uart_add_sysdev(di);
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uart_init(di);
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}
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static void
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uart_cnterm(struct consdev *cp)
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{
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uart_term(cp->cn_arg);
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}
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static void
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uart_cnputc(struct consdev *cp, int c)
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{
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uart_putc(cp->cn_arg, c);
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}
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static int
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uart_cncheckc(struct consdev *cp)
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{
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return (uart_poll(cp->cn_arg));
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}
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static int
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uart_cngetc(struct consdev *cp)
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{
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return (uart_getc(cp->cn_arg));
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}
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static void
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uart_tty_oproc(struct tty *tp)
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{
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struct uart_softc *sc;
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KASSERT(tp->t_dev != NULL, ("foo"));
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sc = tp->t_dev->si_drv1;
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if (sc == NULL || sc->sc_leaving)
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return;
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/*
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* Handle input flow control. Note that if we have hardware support,
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* we don't do anything here. We continue to receive until our buffer
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* is full. At that time we cannot empty the UART itself and it will
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* de-assert RTS for us. In that situation we're completely stuffed.
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* Without hardware support, we need to toggle RTS ourselves.
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*/
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if ((tp->t_cflag & CRTS_IFLOW) && !sc->sc_hwiflow) {
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if ((tp->t_state & TS_TBLOCK) &&
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(sc->sc_hwsig & UART_SIG_RTS))
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UART_SETSIG(sc, UART_SIG_DRTS);
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else if (!(tp->t_state & TS_TBLOCK) &&
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!(sc->sc_hwsig & UART_SIG_RTS))
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UART_SETSIG(sc, UART_SIG_DRTS|UART_SIG_RTS);
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}
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if (tp->t_state & TS_TTSTOP)
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return;
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if ((tp->t_state & TS_BUSY) || sc->sc_txbusy)
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return;
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if (tp->t_outq.c_cc == 0) {
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ttwwakeup(tp);
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return;
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}
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sc->sc_txdatasz = q_to_b(&tp->t_outq, sc->sc_txbuf, sc->sc_txfifosz);
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tp->t_state |= TS_BUSY;
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UART_TRANSMIT(sc);
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ttwwakeup(tp);
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}
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static int
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uart_tty_param(struct tty *tp, struct termios *t)
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{
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struct uart_softc *sc;
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int databits, parity, stopbits;
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KASSERT(tp->t_dev != NULL, ("foo"));
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sc = tp->t_dev->si_drv1;
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if (sc == NULL || sc->sc_leaving)
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return (ENODEV);
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if (t->c_ispeed != t->c_ospeed && t->c_ospeed != 0)
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return (EINVAL);
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/* Fixate certain parameters for system devices. */
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if (sc->sc_sysdev != NULL) {
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t->c_ispeed = t->c_ospeed = sc->sc_sysdev->baudrate;
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t->c_cflag |= CLOCAL;
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t->c_cflag &= ~HUPCL;
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}
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if (t->c_ospeed == 0) {
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UART_SETSIG(sc, UART_SIG_DDTR | UART_SIG_DRTS);
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return (0);
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}
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switch (t->c_cflag & CSIZE) {
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case CS5: databits = 5; break;
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case CS6: databits = 6; break;
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case CS7: databits = 7; break;
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default: databits = 8; break;
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}
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stopbits = (t->c_cflag & CSTOPB) ? 2 : 1;
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if (t->c_cflag & PARENB)
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parity = (t->c_cflag & PARODD) ? UART_PARITY_ODD
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: UART_PARITY_EVEN;
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else
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parity = UART_PARITY_NONE;
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UART_PARAM(sc, t->c_ospeed, databits, stopbits, parity);
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UART_SETSIG(sc, UART_SIG_DDTR | UART_SIG_DTR);
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/* Set input flow control state. */
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if (!sc->sc_hwiflow) {
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if ((t->c_cflag & CRTS_IFLOW) && (tp->t_state & TS_TBLOCK))
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UART_SETSIG(sc, UART_SIG_DRTS);
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else
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UART_SETSIG(sc, UART_SIG_DRTS | UART_SIG_RTS);
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} else
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UART_IOCTL(sc, UART_IOCTL_IFLOW, (t->c_cflag & CRTS_IFLOW));
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/* Set output flow control state. */
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if (sc->sc_hwoflow)
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UART_IOCTL(sc, UART_IOCTL_OFLOW, (t->c_cflag & CCTS_OFLOW));
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ttsetwater(tp);
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return (0);
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}
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static void
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uart_tty_stop(struct tty *tp, int rw)
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{
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struct uart_softc *sc;
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KASSERT(tp->t_dev != NULL, ("foo"));
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sc = tp->t_dev->si_drv1;
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if (sc == NULL || sc->sc_leaving)
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return;
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if (rw & FWRITE) {
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if (sc->sc_txbusy) {
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sc->sc_txbusy = 0;
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UART_FLUSH(sc, UART_FLUSH_TRANSMITTER);
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}
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tp->t_state &= ~TS_BUSY;
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}
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if (rw & FREAD) {
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UART_FLUSH(sc, UART_FLUSH_RECEIVER);
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sc->sc_rxget = sc->sc_rxput = 0;
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}
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}
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void
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uart_tty_intr(void *arg)
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{
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struct uart_softc *sc = arg;
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struct tty *tp;
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int c, pend, sig, xc;
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if (sc->sc_leaving)
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return;
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pend = atomic_readandclear_32(&sc->sc_ttypend);
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if (!(pend & UART_IPEND_MASK))
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return;
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tp = sc->sc_u.u_tty.tp;
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if (pend & UART_IPEND_RXREADY) {
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while (!uart_rx_empty(sc) && !(tp->t_state & TS_TBLOCK)) {
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xc = uart_rx_get(sc);
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c = xc & 0xff;
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if (xc & UART_STAT_FRAMERR)
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c |= TTY_FE;
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if (xc & UART_STAT_PARERR)
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c |= TTY_PE;
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(*linesw[tp->t_line].l_rint)(c, tp);
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}
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}
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if (pend & UART_IPEND_BREAK) {
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if (tp != NULL && !(tp->t_iflag & IGNBRK))
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(*linesw[tp->t_line].l_rint)(0, tp);
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}
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if (pend & UART_IPEND_SIGCHG) {
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sig = pend & UART_IPEND_SIGMASK;
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if (sig & UART_SIG_DDCD)
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(*linesw[tp->t_line].l_modem)(tp, sig & UART_SIG_DCD);
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if ((sig & UART_SIG_DCTS) && (tp->t_cflag & CCTS_OFLOW) &&
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!sc->sc_hwoflow) {
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if (sig & UART_SIG_CTS) {
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tp->t_state &= ~TS_TTSTOP;
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(*linesw[tp->t_line].l_start)(tp);
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} else
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tp->t_state |= TS_TTSTOP;
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}
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}
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if (pend & UART_IPEND_TXIDLE) {
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tp->t_state &= ~TS_BUSY;
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(*linesw[tp->t_line].l_start)(tp);
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}
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}
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int
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uart_tty_attach(struct uart_softc *sc)
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{
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struct tty *tp;
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tp = ttymalloc(NULL);
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sc->sc_u.u_tty.tp = tp;
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sc->sc_u.u_tty.si[0] = make_dev(&uart_cdevsw,
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device_get_unit(sc->sc_dev), UID_ROOT, GID_WHEEL, 0600, "ttyu%r",
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device_get_unit(sc->sc_dev));
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sc->sc_u.u_tty.si[0]->si_drv1 = sc;
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sc->sc_u.u_tty.si[0]->si_tty = tp;
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sc->sc_u.u_tty.si[1] = make_dev(&uart_cdevsw,
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device_get_unit(sc->sc_dev) | UART_MINOR_CALLOUT, UID_UUCP,
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GID_DIALER, 0660, "uart%r", device_get_unit(sc->sc_dev));
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sc->sc_u.u_tty.si[1]->si_drv1 = sc;
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sc->sc_u.u_tty.si[1]->si_tty = tp;
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tp->t_oproc = uart_tty_oproc;
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tp->t_param = uart_tty_param;
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tp->t_stop = uart_tty_stop;
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if (sc->sc_sysdev != NULL && sc->sc_sysdev->type == UART_DEV_CONSOLE) {
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sprintf(((struct consdev *)sc->sc_sysdev->cookie)->cn_name,
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"ttyu%r", device_get_unit(sc->sc_dev));
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}
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swi_add(&tty_ithd, uart_driver_name, uart_tty_intr, sc, SWI_TTY,
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INTR_TYPE_TTY, &sc->sc_softih);
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return (0);
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}
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int uart_tty_detach(struct uart_softc *sc)
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{
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ithread_remove_handler(sc->sc_softih);
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destroy_dev(sc->sc_u.u_tty.si[0]);
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destroy_dev(sc->sc_u.u_tty.si[1]);
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/* ttyfree(sc->sc_u.u_tty.tp); */
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return (0);
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}
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static int
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uart_tty_open(dev_t dev, int flags, int mode, struct thread *td)
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{
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struct uart_softc *sc;
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struct tty *tp;
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int error;
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sc = dev->si_drv1;
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if (sc == NULL || sc->sc_leaving)
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return (ENODEV);
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tp = dev->si_tty;
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loop:
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if (sc->sc_opened) {
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KASSERT(tp->t_state & TS_ISOPEN, ("foo"));
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/*
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* The device is open, so everything has been initialized.
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* Handle conflicts.
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*/
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if (minor(dev) & UART_MINOR_CALLOUT) {
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if (!sc->sc_callout)
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return (EBUSY);
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} else {
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if (sc->sc_callout) {
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if (flags & O_NONBLOCK)
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return (EBUSY);
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error = tsleep(sc, TTIPRI|PCATCH, "uartbi", 0);
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if (error)
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return (error);
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sc = dev->si_drv1;
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if (sc == NULL || sc->sc_leaving)
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return (ENODEV);
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goto loop;
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}
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}
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if (tp->t_state & TS_XCLUDE && suser(td) != 0)
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return (EBUSY);
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} else {
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KASSERT(!(tp->t_state & TS_ISOPEN), ("foo"));
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/*
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* The device isn't open, so there are no conflicts.
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* Initialize it. Initialization is done twice in many
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* cases: to preempt sleeping callin opens if we are
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* callout, and to complete a callin open after DCD rises.
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*/
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sc->sc_callout = (minor(dev) & UART_MINOR_CALLOUT) ? 1 : 0;
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tp->t_dev = dev;
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tp->t_cflag = TTYDEF_CFLAG;
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tp->t_iflag = TTYDEF_IFLAG;
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tp->t_lflag = TTYDEF_LFLAG;
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tp->t_oflag = TTYDEF_OFLAG;
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tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
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ttychars(tp);
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error = uart_tty_param(tp, &tp->t_termios);
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if (error)
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return (error);
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/*
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* Handle initial DCD.
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*/
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if ((sc->sc_hwsig & UART_SIG_DCD) || sc->sc_callout)
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(*linesw[tp->t_line].l_modem)(tp, 1);
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}
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/*
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* Wait for DCD if necessary.
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*/
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if (!(tp->t_state & TS_CARR_ON) && !sc->sc_callout &&
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!(tp->t_cflag & CLOCAL) && !(flags & O_NONBLOCK)) {
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error = tsleep(TSA_CARR_ON(tp), TTIPRI|PCATCH, "uartdcd", 0);
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if (error)
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return (error);
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sc = dev->si_drv1;
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if (sc == NULL || sc->sc_leaving)
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return (ENODEV);
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goto loop;
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}
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error = ttyopen(dev, tp);
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if (error)
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return (error);
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error = (*linesw[tp->t_line].l_open)(dev, tp);
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if (error)
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return (error);
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KASSERT(tp->t_state & TS_ISOPEN, ("foo"));
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sc->sc_opened = 1;
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return (0);
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}
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static int
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uart_tty_close(dev_t dev, int flags, int mode, struct thread *td)
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{
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struct uart_softc *sc;
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struct tty *tp;
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sc = dev->si_drv1;
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if (sc == NULL || sc->sc_leaving)
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return (ENODEV);
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tp = dev->si_tty;
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if (!sc->sc_opened) {
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KASSERT(!(tp->t_state & TS_ISOPEN), ("foo"));
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return (0);
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}
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KASSERT(tp->t_state & TS_ISOPEN, ("foo"));
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if (sc->sc_hwiflow)
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UART_IOCTL(sc, UART_IOCTL_IFLOW, 0);
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if (sc->sc_hwoflow)
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UART_IOCTL(sc, UART_IOCTL_OFLOW, 0);
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if (sc->sc_sysdev == NULL)
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UART_SETSIG(sc, UART_SIG_DDTR | UART_SIG_DRTS);
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/* Disable pulse capturing. */
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sc->sc_pps.ppsparam.mode = 0;
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(*linesw[tp->t_line].l_close)(tp, flags);
|
|
ttyclose(tp);
|
|
wakeup(sc);
|
|
wakeup(TSA_CARR_ON(tp));
|
|
KASSERT(!(tp->t_state & TS_ISOPEN), ("foo"));
|
|
sc->sc_opened = 0;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
uart_tty_ioctl(dev_t dev, u_long cmd, caddr_t data, int flags,
|
|
struct thread *td)
|
|
{
|
|
struct uart_softc *sc;
|
|
struct tty *tp;
|
|
int bits, error, sig;
|
|
|
|
sc = dev->si_drv1;
|
|
if (sc == NULL || sc->sc_leaving)
|
|
return (ENODEV);
|
|
|
|
tp = dev->si_tty;
|
|
error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flags, td);
|
|
if (error != ENOIOCTL)
|
|
return (error);
|
|
error = ttioctl(tp, cmd, data, flags);
|
|
if (error != ENOIOCTL)
|
|
return (error);
|
|
|
|
error = 0;
|
|
switch (cmd) {
|
|
case TIOCSBRK:
|
|
UART_IOCTL(sc, UART_IOCTL_BREAK, 1);
|
|
break;
|
|
case TIOCCBRK:
|
|
UART_IOCTL(sc, UART_IOCTL_BREAK, 0);
|
|
break;
|
|
case TIOCSDTR:
|
|
UART_SETSIG(sc, UART_SIG_DDTR | UART_SIG_DTR);
|
|
break;
|
|
case TIOCCDTR:
|
|
UART_SETSIG(sc, UART_SIG_DDTR);
|
|
break;
|
|
case TIOCMSET:
|
|
bits = *(int*)data;
|
|
sig = UART_SIG_DDTR | UART_SIG_DRTS;
|
|
if (bits & TIOCM_DTR)
|
|
sig |= UART_SIG_DTR;
|
|
if (bits & TIOCM_RTS)
|
|
sig |= UART_SIG_RTS;
|
|
UART_SETSIG(sc, sig);
|
|
break;
|
|
case TIOCMBIS:
|
|
bits = *(int*)data;
|
|
sig = 0;
|
|
if (bits & TIOCM_DTR)
|
|
sig |= UART_SIG_DDTR | UART_SIG_DTR;
|
|
if (bits & TIOCM_RTS)
|
|
sig |= UART_SIG_DRTS | UART_SIG_RTS;
|
|
UART_SETSIG(sc, sig);
|
|
break;
|
|
case TIOCMBIC:
|
|
bits = *(int*)data;
|
|
sig = 0;
|
|
if (bits & TIOCM_DTR)
|
|
sig |= UART_SIG_DDTR;
|
|
if (bits & TIOCM_RTS)
|
|
sig |= UART_SIG_DRTS;
|
|
UART_SETSIG(sc, sig);
|
|
break;
|
|
case TIOCMGET:
|
|
sig = sc->sc_hwsig;
|
|
bits = TIOCM_LE;
|
|
if (sig & UART_SIG_DTR)
|
|
bits |= TIOCM_DTR;
|
|
if (sig & UART_SIG_RTS)
|
|
bits |= TIOCM_RTS;
|
|
if (sig & UART_SIG_DSR)
|
|
bits |= TIOCM_DSR;
|
|
if (sig & UART_SIG_CTS)
|
|
bits |= TIOCM_CTS;
|
|
if (sig & UART_SIG_DCD)
|
|
bits |= TIOCM_CD;
|
|
if (sig & (UART_SIG_DRI | UART_SIG_RI))
|
|
bits |= TIOCM_RI;
|
|
*(int*)data = bits;
|
|
break;
|
|
default:
|
|
error = pps_ioctl(cmd, data, &sc->sc_pps);
|
|
if (error == ENODEV)
|
|
error = ENOTTY;
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|