+++ /dev/null
-/* $OpenBSD: sxiuart.c,v 1.13 2016/08/15 04:32:57 mglocker Exp $ */
-/*
- * Copyright (c) 2005 Dale Rahn <drahn@motorola.com>
- * Copyright (c) 2013 Artturi Alm
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-
-#include <sys/param.h>
-#include <sys/ioctl.h>
-#include <sys/proc.h>
-#include <sys/tty.h>
-#include <sys/uio.h>
-#include <sys/systm.h>
-#include <sys/time.h>
-#include <sys/device.h>
-#include <sys/syslog.h>
-#include <sys/conf.h>
-#include <sys/fcntl.h>
-#include <sys/select.h>
-#include <sys/kernel.h>
-
-#include <dev/cons.h>
-
-#ifdef DDB
-#include <ddb/db_var.h>
-#endif
-
-#include <machine/bus.h>
-#include <machine/fdt.h>
-
-#include <arm/armv7/armv7var.h>
-#include <armv7/armv7/armv7var.h>
-#include <armv7/armv7/armv7_machdep.h>
-#include <armv7/sunxi/sxiuartreg.h>
-#include <armv7/sunxi/sunxireg.h>
-
-#include <dev/ofw/openfirm.h>
-#include <dev/ofw/ofw_pinctrl.h>
-#include <dev/ofw/fdt.h>
-
-#define DEVUNIT(x) (minor(x) & 0x7f)
-#define DEVCUA(x) (minor(x) & 0x80)
-
-struct sxiuart_softc {
- struct device sc_dev;
- bus_space_tag_t sc_iot;
- bus_space_handle_t sc_ioh;
- struct soft_intrhand *sc_si;
- void *sc_irq;
- struct tty *sc_tty;
- struct timeout sc_diag_tmo;
- struct timeout sc_dtr_tmo;
- int sc_overflows;
- int sc_floods;
- int sc_errors;
- int sc_halt;
- uint8_t sc_ier;
- uint8_t sc_mcr;
- uint8_t sc_msr;
- uint8_t sc_dtr;
- uint8_t sc_lcr;
- int sc_frequency;
- uint8_t sc_hwflags;
-#define COM_HW_NOIEN 0x01
-#define COM_HW_FIFO 0x02
-#define COM_HW_SIR 0x20
-#define COM_HW_CONSOLE 0x40
-#define COM_HW_KGDB 0x80
- uint8_t sc_swflags;
-#define COM_SW_SOFTCAR 0x01
-#define COM_SW_CLOCAL 0x02
-#define COM_SW_CRTSCTS 0x04
-#define COM_SW_MDMBUF 0x08
-#define COM_SW_PPS 0x10
-
- uint8_t sc_initialize;
- uint8_t sc_cua;
- uint8_t *sc_ibuf, *sc_ibufp, *sc_ibufhigh, *sc_ibufend;
-#define SXIUART_IBUFSIZE 128
-#define SXIUART_IHIGHWATER 100
- uint8_t sc_ibufs[2][SXIUART_IBUFSIZE];
-};
-
-
-int sxiuartprobe(struct device *, void *, void *);
-int sxiuart_match(struct device *, void *, void *);
-void sxiuart_attach(struct device *, struct device *, void *);
-
-void sxiuartcnprobe(struct consdev *);
-void sxiuartcninit(struct consdev *);
-int sxiuartcnattach(bus_space_tag_t, bus_addr_t, int, long, tcflag_t);
-int sxiuartcngetc(dev_t);
-void sxiuartcnputc(dev_t, int);
-void sxiuartcnpollc(dev_t, int);
-int sxiuart_param(struct tty *, struct termios *);
-void sxiuart_start(struct tty *);
-void sxiuart_pwroff(struct sxiuart_softc *);
-void sxiuart_diag(void *);
-void sxiuart_raisedtr(void *);
-void sxiuart_softint(void *);
-int sxiuart_intr(void *);
-
-extern int comcnspeed;
-extern int comcnmode;
-
-struct sxiuart_softc *sxiuart_sc(dev_t);
-
-/* XXX - we imitate 'com' serial ports and take over their entry points */
-/* XXX: These belong elsewhere */
-cdev_decl(sxiuart);
-
-struct cfattach sxiuart_ca = {
- sizeof(struct sxiuart_softc), sxiuart_match, sxiuart_attach
-};
-
-struct cfdriver sxiuart_cd = {
- NULL, "sxiuart", DV_TTY
-};
-
-struct consdev sxiuartcons = {
- sxiuartcnprobe, sxiuartcninit,
- sxiuartcngetc, sxiuartcnputc,
- sxiuartcnpollc, NULL,
- NODEV, CN_HIGHPRI
-};
-
-bus_space_tag_t sxiuartconsiot;
-bus_space_handle_t sxiuartconsioh;
-bus_addr_t sxiuartconsaddr;
-tcflag_t sxiuartconscflag = TTYDEF_CFLAG;
-int sxiuartdefaultrate = B115200;
-
-struct cdevsw sxiuartdev =
- cdev_tty_init(1/*XXX NIMXUART */ , sxiuart); /* 12: serial port */
-
-void
-sxiuart_init_cons(void)
-{
- struct fdt_reg reg;
- void *node;
-
- if ((node = fdt_find_cons("snps,dw-apb-uart")) == NULL)
- return;
- if (fdt_get_reg(node, 0, ®))
- return;
-
- sxiuartcnattach(&armv7_a4x_bs_tag, reg.addr, comcnspeed, 24000000,
- comcnmode);
-}
-
-int
-sxiuart_match(struct device *parent, void *match, void *aux)
-{
- struct fdt_attach_args *faa = aux;
-
- return OF_is_compatible(faa->fa_node, "snps,dw-apb-uart");
-}
-
-void
-sxiuart_attach(struct device *parent, struct device *self, void *aux)
-{
- struct sxiuart_softc *sc = (struct sxiuart_softc *) self;
- struct fdt_attach_args *faa = aux;
- bus_space_tag_t iot;
- bus_space_handle_t ioh;
- int s;
-
- if (faa->fa_nreg < 1)
- return;
-
- pinctrl_byname(faa->fa_node, "default");
-
- sc->sc_iot = iot = faa->fa_iot;
- if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
- faa->fa_reg[0].size, 0, &sc->sc_ioh))
- panic("sxiuartattach: bus_space_map failed!");
- ioh = sc->sc_ioh;
-
- if (faa->fa_reg[0].addr == sxiuartconsaddr) {
- cn_tab->cn_dev = makedev(12 /* XXX */, 0);
- cdevsw[12] = sxiuartdev; /* KLUDGE */
-
- printf(": console");
- /* XXX compare uses of COM_HW_CONSOLE against com.c */
- SET(sc->sc_hwflags, COM_HW_CONSOLE);
- SET(sc->sc_swflags, COM_SW_SOFTCAR);
- sxiuartconsiot = iot;
- sxiuartconsioh = ioh;
- }
-
- timeout_set(&sc->sc_diag_tmo, sxiuart_diag, sc);
- timeout_set(&sc->sc_dtr_tmo, sxiuart_raisedtr, sc);
- sc->sc_si = softintr_establish(IPL_TTY, sxiuart_softint, sc);
- if(sc->sc_si == NULL)
- panic("%s: can't establish soft interrupt.",
- sc->sc_dev.dv_xname);
-
- sc->sc_frequency = 24000000; /* XXX */
-
- if ((bus_space_read_1(sc->sc_iot, sc->sc_ioh, SXIUART_IIR) &
- IIR_BUSY) == IIR_BUSY)
- (void)bus_space_read_4(sc->sc_iot, sc->sc_ioh, SXIUART_USR);
- sc->sc_ier = 0;
- /* disable interrupts */
- bus_space_write_1(iot, ioh, SXIUART_IER, sc->sc_ier);
-
- /* clear and disable fifo */
- bus_space_write_1(iot, ioh, SXIUART_FCR, 0 | RFIFOR | XFIFOR);
-
- s = splhigh();
- SET(sc->sc_mcr, MCR_DTR | MCR_RTS | MCR_IENABLE);
- bus_space_write_1(sc->sc_iot, sc->sc_ioh, SXIUART_MCR, sc->sc_mcr);
- splx(s);
-
- arm_intr_establish_fdt(faa->fa_node, IPL_TTY,
- sxiuart_intr, sc, sc->sc_dev.dv_xname);
-
- printf("\n");
-}
-
-int
-sxiuart_intr(void *arg)
-{
- struct sxiuart_softc *sc = arg;
- bus_space_tag_t iot = sc->sc_iot;
- bus_space_handle_t ioh = sc->sc_ioh;
- struct tty *tp;
- uint32_t cnt;
- uint8_t c, iir, lsr, msr, delta;
- uint8_t *p;
-
- iir = bus_space_read_1(iot, ioh, SXIUART_IIR);
-
- if ((iir & IIR_IMASK) == IIR_BUSY) {
- (void)bus_space_read_1(iot, ioh, SXIUART_USR);
- return (0);
- }
- if (ISSET(iir, IIR_NOPEND))
- return (0);
-
- if (sc->sc_tty == NULL)
- return (0);
-
- tp = sc->sc_tty;
- cnt = 0;
-loop:
- lsr = bus_space_read_1(iot, ioh, SXIUART_LSR);
- if (ISSET(lsr, LSR_RXRDY)) {
- if (cnt == 0) {
- p = sc->sc_ibufp;
- softintr_schedule(sc->sc_si);
- }
- cnt++;
-
- c = bus_space_read_1(iot, ioh, SXIUART_RBR);
- if (ISSET(lsr, LSR_BI)) {
-#if defined(DDB)
- if (ISSET(sc->sc_hwflags,
- COM_HW_CONSOLE)) {
- if (db_console)
- Debugger();
- goto loop;
- }
-#endif
- c = 0;
- }
- if (p >= sc->sc_ibufend) {
- sc->sc_floods++;
- if (sc->sc_errors++ == 0)
- timeout_add_sec(&sc->sc_diag_tmo, 60);
- } else {
- *p++ = c;
- *p++ = lsr;
- if (p == sc->sc_ibufhigh &&
- ISSET(tp->t_cflag, CRTSCTS)) {
- /* XXX */
- CLR(sc->sc_mcr, MCR_RTS);
- bus_space_write_1(iot, ioh, SXIUART_MCR, sc->sc_mcr);
- }
- }
- goto loop;
- } else if (cnt > 0)
- sc->sc_ibufp = p;
-
- msr = bus_space_read_1(iot, ioh, SXIUART_MSR);
- if (msr != sc->sc_msr) {
- delta = msr ^ sc->sc_msr;
-
- ttytstamp(tp, sc->sc_msr & MSR_CTS,
- msr & MSR_CTS, sc->sc_msr & MSR_DCD,
- msr & MSR_DCD);
-
- sc->sc_msr = msr;
- if (ISSET(delta, MSR_DCD)) {
- if (!ISSET(sc->sc_swflags, COM_SW_SOFTCAR) &&
- (*linesw[tp->t_line].l_modem)(tp,
- ISSET(msr, MSR_DCD)) == 0) {
- CLR(sc->sc_mcr, sc->sc_dtr);
- bus_space_write_1(iot, ioh, SXIUART_MCR,
- sc->sc_mcr);
- }
- }
- if (ISSET(delta & msr, MSR_CTS) &&
- ISSET(tp->t_cflag, CRTSCTS))
- (*linesw[tp->t_line].l_start)(tp);
- }
-
- if (ISSET(tp->t_state, TS_BUSY) && ISSET(lsr, LSR_TXRDY)) {
- CLR(tp->t_state, TS_BUSY | TS_FLUSH);
- if (sc->sc_halt > 0)
- wakeup(&tp->t_outq);
- (*linesw[tp->t_line].l_start)(tp);
- }
-
- iir = bus_space_read_1(iot, ioh, SXIUART_IIR);
-
- if (ISSET(iir, IIR_NOPEND))
- goto done;
-
- cnt = 0;
- goto loop;
-done:
- return (1);
-}
-
-int
-sxiuart_param(struct tty *tp, struct termios *t)
-{
- struct sxiuart_softc *sc = sxiuart_cd.cd_devs[DEVUNIT(tp->t_dev)];
- bus_space_tag_t iot = sc->sc_iot;
- bus_space_handle_t ioh = sc->sc_ioh;
- int ospeed = t->c_ospeed;
- int error;
- tcflag_t oldcflag;
- uint16_t ratediv;
- uint8_t lcr = 0;
-
- if (t->c_ospeed < 0 || (t->c_ispeed && t->c_ispeed != t->c_ospeed))
- return (EINVAL);
-
- /* XXX get prev state of SXIUART_LCR_SBREAK bit */
-
- switch (ISSET(t->c_cflag, CSIZE)) {
- case CS5:
- SET(lcr, LCR_5BITS);
- break;
- case CS6:
- SET(lcr, LCR_6BITS);
- break;
- case CS7:
- SET(lcr, LCR_7BITS);
- break;
- case CS8:
- SET(lcr, LCR_8BITS);
- break;
- }
- if (ISSET(t->c_cflag, PARENB)) {
- SET(lcr, LCR_PENAB);
- if (!ISSET(t->c_cflag, PARODD))
- SET(lcr, LCR_PEVEN);
- }
- if (ISSET(t->c_cflag, CSTOPB))
- SET(lcr, LCR_STOPB);
-
- sc->sc_lcr = lcr;
-
- if (ospeed == 0) {
- CLR(sc->sc_mcr, MCR_DTR);
- bus_space_write_1(iot, ioh, SXIUART_MCR, sc->sc_mcr);
- }
-
- if (sc->sc_initialize || (tp->t_ispeed != t->c_ispeed)) {
- sc->sc_initialize = 0;
-
- if (ospeed != 0) {
- while (ISSET(tp->t_state, TS_BUSY)) {
- ++sc->sc_halt;
- error = ttysleep(tp, &tp->t_outq,
- TTOPRI | PCATCH, "sxiuartprm", 0);
- --sc->sc_halt;
- if (error) {
- sxiuart_start(tp);
- return (error);
- }
- }
-
- bus_space_write_1(iot, ioh, SXIUART_LCR,
- lcr | LCR_DLAB);
- ratediv = 13;
- bus_space_write_1(iot, ioh, SXIUART_DLL, ratediv);
- bus_space_write_1(iot, ioh, SXIUART_DLH, ratediv >> 8);
- bus_space_write_1(iot, ioh, SXIUART_LCR, lcr);
- SET(sc->sc_mcr, MCR_DTR);
- bus_space_write_1(iot, ioh, SXIUART_MCR, sc->sc_mcr);
- } else
- bus_space_write_1(iot, ioh, SXIUART_LCR, lcr);
-
- /* setup fifo */
- bus_space_write_1(iot, ioh, SXIUART_FCR, FIFOE | FIFO_RXT0);
- } else
- bus_space_write_1(iot, ioh, SXIUART_LCR, lcr);
-
- /* When not using CRTSCTS, RTS follows DTR. */
- if (!ISSET(t->c_cflag, CRTSCTS)) {
- if (ISSET(sc->sc_mcr, MCR_DTR)) {
- if (!ISSET(sc->sc_mcr, MCR_RTS)) {
- SET(sc->sc_mcr, MCR_RTS);
- bus_space_write_1(iot, ioh, SXIUART_MCR, sc->sc_mcr);
- }
- } else {
- if (ISSET(sc->sc_mcr, MCR_RTS)) {
- CLR(sc->sc_mcr, MCR_RTS);
- bus_space_write_1(iot, ioh, SXIUART_MCR, sc->sc_mcr);
- }
- }
- sc->sc_dtr = MCR_DTR | MCR_RTS;
- } else
- sc->sc_dtr = MCR_DTR;
-
-
- /* and copy to tty */
- tp->t_ispeed = t->c_ispeed;
- tp->t_ospeed = t->c_ospeed;
- oldcflag = tp->t_cflag;
- tp->t_cflag = t->c_cflag;
-
- /*
- * If DCD is off and MDMBUF is changed, ask the tty layer if we should
- * stop the device.
- */
- if (!ISSET(sc->sc_msr, MSR_DCD) &&
- !ISSET(sc->sc_swflags, COM_SW_SOFTCAR) &&
- ISSET(oldcflag, MDMBUF) != ISSET(tp->t_cflag, MDMBUF) &&
- (*linesw[tp->t_line].l_modem)(tp, 0) == 0) {
- CLR(sc->sc_mcr, sc->sc_dtr);
- bus_space_write_1(iot, ioh, SXIUART_MCR, sc->sc_mcr);
- }
-
-
- sxiuart_start(tp);
-
- return (0);
-}
-
-void
-sxiuart_start(struct tty *tp)
-{
- struct sxiuart_softc *sc = sxiuart_sc(tp->t_dev);
- bus_space_tag_t iot = sc->sc_iot;
- bus_space_handle_t ioh = sc->sc_ioh;
- int i, n, s;
- uint8_t buf[64];
-
- s = spltty();
- if (ISSET(tp->t_state, TS_BUSY)) {
- splx(s);
- return;
- }
- if (ISSET(tp->t_state, TS_TIMEOUT | TS_TTSTOP) || sc->sc_halt > 0)
- goto stopped;
- if (ISSET(tp->t_cflag, CRTSCTS) && !ISSET(sc->sc_msr, MSR_CTS))
- goto stopped;
-#if 0
- if (tp->t_outq.c_cc <= tp->t_lowat) {
- if (ISSET(tp->t_state, TS_ASLEEP)) {
- CLR(tp->t_state, TS_ASLEEP);
- wakeup(&tp->t_outq);
- }
- if (tp->t_outq.c_cc == 0)
- goto stopped;
- selwakeup(&tp->t_wsel);
- }
-#else
- ttwakeupwr(tp);
- if (tp->t_outq.c_cc == 0)
- goto stopped;
-#endif
- SET(tp->t_state, TS_BUSY);
-
- if (!ISSET(sc->sc_ier, IER_ETXRDY)) {
- SET(sc->sc_ier, IER_ETXRDY);
- bus_space_write_1(iot, ioh, SXIUART_IER, sc->sc_ier);
- }
-
- n = q_to_b(&tp->t_outq, buf, sizeof(buf));
- for (i = 0; i < n; i++)
- bus_space_write_1(iot, ioh, SXIUART_THR, buf[i]);
- bzero(buf, n);
- splx(s);
- return;
-stopped:
- if (ISSET(sc->sc_ier, IER_ETXRDY)) {
- CLR(sc->sc_ier, IER_ETXRDY);
- bus_space_write_1(iot, ioh, SXIUART_IER, sc->sc_ier);
- }
- splx(s);
-}
-
-void
-sxiuart_pwroff(struct sxiuart_softc *sc)
-{
-}
-
-void
-sxiuart_diag(void *arg)
-{
- struct sxiuart_softc *sc = arg;
- int overflows, floods;
- int s = spltty();
- sc->sc_errors = 0;
- overflows = sc->sc_overflows;
- sc->sc_overflows = 0;
- floods = sc->sc_floods;
- sc->sc_floods = 0;
- splx(s);
- log(LOG_WARNING, "%s: %d silo overflow%s, %d ibuf overflow%s\n",
- sc->sc_dev.dv_xname,
- overflows, overflows == 1 ? "" : "s",
- floods, floods == 1 ? "" : "s");
-}
-
-void
-sxiuart_raisedtr(void *arg)
-{
- struct sxiuart_softc *sc = arg;
-
- SET(sc->sc_mcr, MCR_DTR | MCR_RTS);
- bus_space_write_1(sc->sc_iot, sc->sc_ioh, SXIUART_MCR, sc->sc_mcr);
-}
-
-void
-sxiuart_softint(void *arg)
-{
- struct sxiuart_softc *sc = arg;
- struct tty *tp;
- uint8_t *ibufp;
- uint8_t *ibufend;
- int c, s;
- static int lsrmap[8] = {
- 0, TTY_PE,
- TTY_FE, TTY_PE|TTY_FE,
- TTY_FE, TTY_PE|TTY_FE,
- TTY_FE, TTY_PE|TTY_FE
- };
-
- if (sc == NULL || sc->sc_ibufp == sc->sc_ibuf)
- return;
- tp = sc->sc_tty;
-
- s = spltty();
-
- ibufp = sc->sc_ibuf;
- ibufend = sc->sc_ibufp;
-
- if (ibufp == ibufend) {
- splx(s);
- return;
- }
-
- sc->sc_ibufp = sc->sc_ibuf = (ibufp == sc->sc_ibufs[0]) ?
- sc->sc_ibufs[1] : sc->sc_ibufs[0];
- sc->sc_ibufhigh = sc->sc_ibuf + SXIUART_IHIGHWATER;
- sc->sc_ibufend = sc->sc_ibuf + SXIUART_IBUFSIZE;
-
- if (tp == NULL || !ISSET(tp->t_state, TS_ISOPEN)) {
- splx(s);
- return;
- }
-
- if (ISSET(tp->t_cflag, CRTSCTS) &&
- !ISSET(sc->sc_mcr, MCR_RTS)) {
- /* XXX */
- SET(sc->sc_mcr, MCR_RTS);
- bus_space_write_1(sc->sc_iot, sc->sc_ioh, SXIUART_MCR,
- sc->sc_mcr);
- }
-
- splx(s);
-
- while (ibufp < ibufend) {
- c = *ibufp++;
- if (ISSET(*ibufp, LSR_OE)) {
- sc->sc_overflows++;
- if (sc->sc_errors++ == 0)
- timeout_add_sec(&sc->sc_diag_tmo, 60);
- }
- /* This is ugly, but fast. */
-#define ASD (LSR_BI | LSR_FE | LSR_PE)
- c |= lsrmap[(*ibufp++ & ASD) >> 2];
-#undef ASD
- (*linesw[tp->t_line].l_rint)(c, tp);
- }
-}
-
-int
-sxiuartopen(dev_t dev, int flag, int mode, struct proc *p)
-{
- struct sxiuart_softc *sc;
- bus_space_tag_t iot;
- bus_space_handle_t ioh;
- struct tty *tp;
- int s;
- int error = 0;
-
- sc = sxiuart_sc(dev);
- if (sc == NULL)
- return (ENXIO);
-
- s = spltty();
- if (sc->sc_tty == NULL)
- tp = sc->sc_tty = ttymalloc(1000000);
- else
- tp = sc->sc_tty;
- splx(s);
-
- tp->t_oproc = sxiuart_start;
- tp->t_param = sxiuart_param;
- tp->t_dev = dev;
-
- if (!ISSET(tp->t_state, TS_ISOPEN)) {
- SET(tp->t_state, TS_WOPEN);
- ttychars(tp);
- tp->t_iflag = TTYDEF_IFLAG;
- tp->t_oflag = TTYDEF_OFLAG;
-
- if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE))
- tp->t_cflag = sxiuartconscflag;
- else
- tp->t_cflag = TTYDEF_CFLAG;
- if (ISSET(sc->sc_swflags, COM_SW_CLOCAL))
- SET(tp->t_cflag, CLOCAL);
- if (ISSET(sc->sc_swflags, COM_SW_CRTSCTS))
- SET(tp->t_cflag, CRTSCTS);
- if (ISSET(sc->sc_swflags, COM_SW_MDMBUF))
- SET(tp->t_cflag, MDMBUF);
- tp->t_lflag = TTYDEF_LFLAG;
- tp->t_ispeed = tp->t_ospeed = sxiuartdefaultrate;
-
- s = spltty();
-
- sc->sc_initialize = 1;
- sxiuart_param(tp, &tp->t_termios);
- ttsetwater(tp);
-
- sc->sc_ibufp = sc->sc_ibuf = sc->sc_ibufs[0];
- sc->sc_ibufhigh = sc->sc_ibuf + SXIUART_IHIGHWATER;
- sc->sc_ibufend = sc->sc_ibuf + SXIUART_IBUFSIZE;
-
- iot = sc->sc_iot;
- ioh = sc->sc_ioh;
-
- /* (Re)enable and drain FIFOs. */
- for (;;) {
- bus_space_write_1(iot, ioh, SXIUART_FCR, 0);
- delay(100);
- (void)bus_space_read_1(iot, ioh, SXIUART_RBR);
- bus_space_write_1(iot, ioh, SXIUART_FCR,
- FIFOE | FIFO_RXT0);
- delay(100);
- if (!ISSET(bus_space_read_1(iot, ioh, SXIUART_LSR),
- LSR_RXRDY))
- break;
- }
-
- sc->sc_mcr = MCR_DTR | MCR_RTS | MCR_IENABLE;
- bus_space_write_1(iot, ioh, SXIUART_MCR, sc->sc_mcr);
-
- sc->sc_ier = IER_ERXRDY | IER_ERLS | IER_EMSC;
- bus_space_write_1(iot, ioh, SXIUART_IER, sc->sc_ier);
-
- sc->sc_msr = bus_space_read_1(iot, ioh, SXIUART_MSR);
- if (ISSET(sc->sc_swflags, COM_SW_SOFTCAR) || DEVCUA(dev) ||
- ISSET(sc->sc_msr, MSR_DCD) ||
- ISSET(tp->t_cflag, MDMBUF))
- SET(tp->t_state, TS_CARR_ON);
- else
- CLR(tp->t_state, TS_CARR_ON);
-
-
- } else if (ISSET(tp->t_state, TS_XCLUDE) && suser(p, 0) != 0)
- return (EBUSY);
- else
- s = spltty();
-
- if (DEVCUA(dev)) {
- if (ISSET(tp->t_state, TS_ISOPEN)) {
- splx(s);
- return (EBUSY);
- }
- sc->sc_cua = 1;
- } else {
- /* tty (not cua) device; wait for carrier if necessary */
- if (ISSET(flag, O_NONBLOCK)) {
- if (sc->sc_cua) {
- /* Opening TTY non-blocking... but the CUA is busy */
- splx(s);
- return (EBUSY);
- }
- } else {
- while (sc->sc_cua ||
- (!ISSET(tp->t_cflag, CLOCAL) &&
- !ISSET(tp->t_state, TS_CARR_ON))) {
- SET(tp->t_state, TS_WOPEN);
- error = ttysleep(tp, &tp->t_rawq,
- TTIPRI | PCATCH, ttopen, 0);
- /*
- * If TS_WOPEN has been reset, that means the
- * cua device has been closed. We don't want
- * to fail in that case,
- * so just go around again.
- */
- if (error && ISSET(tp->t_state, TS_WOPEN)) {
- CLR(tp->t_state, TS_WOPEN);
- if (!sc->sc_cua && !ISSET(tp->t_state,
- TS_ISOPEN))
- sxiuart_pwroff(sc);
- splx(s);
- return (error);
- }
- }
- }
- }
- splx(s);
-
- return (*linesw[tp->t_line].l_open)(dev, tp, p);
-}
-
-int
-sxiuartclose(dev_t dev, int flag, int mode, struct proc *p)
-{
- int unit = DEVUNIT(dev);
- struct sxiuart_softc *sc = sxiuart_cd.cd_devs[unit];
- bus_space_tag_t iot = sc->sc_iot;
- bus_space_handle_t ioh = sc->sc_ioh;
- struct tty *tp = sc->sc_tty;
- int s;
-
- /* XXX This is for cons.c. */
- if (!ISSET(tp->t_state, TS_ISOPEN))
- return (0);
-
- (*linesw[tp->t_line].l_close)(tp, flag, p);
- s = spltty();
- if (ISSET(tp->t_state, TS_WOPEN)) {
- /* tty device is waiting for carrier; drop dtr then re-raise */
- CLR(sc->sc_mcr, MCR_DTR | MCR_RTS);
- bus_space_write_1(iot, ioh, SXIUART_MCR, sc->sc_mcr);
- timeout_add(&sc->sc_dtr_tmo, hz * 2);
- } else {
- /* no one else waiting; turn off the uart */
- sxiuart_pwroff(sc);
- }
- CLR(tp->t_state, TS_BUSY | TS_FLUSH);
-
- sc->sc_cua = 0;
- splx(s);
- ttyclose(tp);
-
- return (0);
-}
-
-int
-sxiuartread(dev_t dev, struct uio *uio, int flag)
-{
- struct tty *tty;
-
- tty = sxiuarttty(dev);
- if (tty == NULL)
- return (ENODEV);
-
- return ((*linesw[tty->t_line].l_read)(tty, uio, flag));
-}
-
-int
-sxiuartwrite(dev_t dev, struct uio *uio, int flag)
-{
- struct tty *tty;
-
- tty = sxiuarttty(dev);
- if (tty == NULL)
- return (ENODEV);
-
- return ((*linesw[tty->t_line].l_write)(tty, uio, flag));
-}
-
-static u_char tiocm_xxx2mcr(int);
-
-static u_char
-tiocm_xxx2mcr(int data)
-{
- u_char m = 0;
-
- if (ISSET(data, TIOCM_DTR))
- SET(m, MCR_DTR);
- if (ISSET(data, TIOCM_RTS))
- SET(m, MCR_RTS);
- return m;
-}
-
-int
-sxiuartioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
-{
- struct sxiuart_softc *sc;
- struct tty *tp;
- bus_space_tag_t iot;
- bus_space_handle_t ioh;
- int error;
-
- sc = sxiuart_sc(dev);
- if (sc == NULL)
- return (ENODEV);
-
- tp = sc->sc_tty;
- if (tp == NULL)
- return (ENXIO);
-
- error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, p);
- if (error >= 0)
- return (error);
-
- error = ttioctl(tp, cmd, data, flag, p);
- if (error >= 0)
- return (error);
-
- iot = sc->sc_iot;
- ioh = sc->sc_ioh;
-
- switch (cmd) {
- case TIOCSBRK:
- SET(sc->sc_lcr, LCR_SBREAK);
- bus_space_write_1(iot, ioh, SXIUART_LCR, sc->sc_lcr);
- break;
- case TIOCCBRK:
- CLR(sc->sc_lcr, LCR_SBREAK);
- bus_space_write_1(iot, ioh, SXIUART_LCR, sc->sc_lcr);
- break;
- case TIOCSDTR:
- SET(sc->sc_mcr, sc->sc_dtr);
- bus_space_write_1(iot, ioh, SXIUART_MCR, sc->sc_mcr);
- break;
- case TIOCCDTR:
- CLR(sc->sc_mcr, sc->sc_dtr);
- bus_space_write_1(iot, ioh, SXIUART_MCR, sc->sc_mcr);
- break;
- case TIOCMSET:
- CLR(sc->sc_mcr, MCR_DTR | MCR_RTS);
- case TIOCMBIS:
- SET(sc->sc_mcr, tiocm_xxx2mcr(*(int *)data));
- bus_space_write_1(iot, ioh, SXIUART_MCR, sc->sc_mcr);
- break;
- case TIOCMBIC:
- CLR(sc->sc_mcr, tiocm_xxx2mcr(*(int *)data));
- bus_space_write_1(iot, ioh, SXIUART_MCR, sc->sc_mcr);
- break;
- case TIOCMGET: {
- u_char m;
- int bits = 0;
-
- m = sc->sc_mcr;
- if (ISSET(m, MCR_DTR))
- SET(bits, TIOCM_DTR);
- if (ISSET(m, MCR_RTS))
- SET(bits, TIOCM_RTS);
- m = sc->sc_msr;
- if (ISSET(m, MSR_DCD))
- SET(bits, TIOCM_CD);
- if (ISSET(m, MSR_CTS))
- SET(bits, TIOCM_CTS);
- if (ISSET(m, MSR_DSR))
- SET(bits, TIOCM_DSR);
- if (ISSET(m, MSR_RI | MSR_TERI))
- SET(bits, TIOCM_RI);
- if (bus_space_read_1(iot, ioh, SXIUART_IER))
- SET(bits, TIOCM_LE);
- *(int *)data = bits;
- break;
- }
- case TIOCGFLAGS: {
- int driverbits, userbits = 0;
-
- driverbits = sc->sc_swflags;
- if (ISSET(driverbits, COM_SW_SOFTCAR))
- SET(userbits, TIOCFLAG_SOFTCAR);
- if (ISSET(driverbits, COM_SW_CLOCAL))
- SET(userbits, TIOCFLAG_CLOCAL);
- if (ISSET(driverbits, COM_SW_CRTSCTS))
- SET(userbits, TIOCFLAG_CRTSCTS);
- if (ISSET(driverbits, COM_SW_MDMBUF))
- SET(userbits, TIOCFLAG_MDMBUF);
- if (ISSET(driverbits, COM_SW_PPS))
- SET(userbits, TIOCFLAG_PPS);
-
- *(int *)data = userbits;
- break;
- }
- case TIOCSFLAGS: {
- int userbits, driverbits = 0;
-
- error = suser(p, 0);
- if (error != 0)
- return(EPERM);
-
- userbits = *(int *)data;
- if (ISSET(userbits, TIOCFLAG_SOFTCAR) ||
- ISSET(sc->sc_hwflags, COM_HW_CONSOLE))
- SET(driverbits, COM_SW_SOFTCAR);
- if (ISSET(userbits, TIOCFLAG_CLOCAL))
- SET(driverbits, COM_SW_CLOCAL);
- if (ISSET(userbits, TIOCFLAG_CRTSCTS))
- SET(driverbits, COM_SW_CRTSCTS);
- if (ISSET(userbits, TIOCFLAG_MDMBUF))
- SET(driverbits, COM_SW_MDMBUF);
- if (ISSET(userbits, TIOCFLAG_PPS))
- SET(driverbits, COM_SW_PPS);
-
- sc->sc_swflags = driverbits;
- break;
- }
- default:
- return (ENOTTY);
- }
-
- return (0);
-}
-
-
-int
-sxiuartstop(struct tty *tp, int flag)
-{
- return (0);
-}
-
-struct tty *
-sxiuarttty(dev_t dev)
-{
- int unit;
- struct sxiuart_softc *sc;
- unit = DEVUNIT(dev);
- if (unit >= sxiuart_cd.cd_ndevs)
- return (NULL);
- sc = (struct sxiuart_softc *)sxiuart_cd.cd_devs[unit];
- if (sc == NULL)
- return (NULL);
- return (sc->sc_tty);
-}
-
-struct sxiuart_softc *
-sxiuart_sc(dev_t dev)
-{
- int unit;
- struct sxiuart_softc *sc;
- unit = DEVUNIT(dev);
- if (unit >= sxiuart_cd.cd_ndevs)
- return (NULL);
- sc = (struct sxiuart_softc *)sxiuart_cd.cd_devs[unit];
- return (sc);
-}
-
-/* serial console */
-void
-sxiuartcnprobe(struct consdev *cp)
-{
- cp->cn_dev = makedev(12 /* XXX */, 0);
- cp->cn_pri = CN_HIGHPRI;
-}
-
-void
-sxiuartcninit(struct consdev *cp)
-{
-}
-
-int
-sxiuartcnattach(bus_space_tag_t iot, bus_addr_t iobase, int rate, long freq,
- tcflag_t cflag)
-{
- int s;
- uint16_t ratediv;
-
- if (bus_space_map(iot, iobase, UARTx_SIZE, 0, &sxiuartconsioh))
- return (ENOMEM);
-
- sxiuartconsiot = iot;
- sxiuartconsaddr = iobase;
- sxiuartconscflag = cflag;
-
- s = splhigh();
- bus_space_write_1(iot, sxiuartconsioh, SXIUART_LCR, LCR_DLAB);
-
- ratediv = 13; /* for 115200baud with 24000000hz freq */
- bus_space_write_1(iot, sxiuartconsioh, SXIUART_DLL, ratediv);
- bus_space_write_1(iot, sxiuartconsioh, SXIUART_DLH, ratediv >> 8);
- bus_space_write_1(iot, sxiuartconsioh, SXIUART_LCR, LCR_8BITS);
-
- bus_space_write_1(iot, sxiuartconsioh, SXIUART_MCR, MCR_DTR | MCR_RTS);
- bus_space_write_1(iot, sxiuartconsioh, SXIUART_IER, 0);
-
- bus_space_write_1(iot, sxiuartconsioh, SXIUART_FCR, FIFOE | FIFO_RXT0);
-
- (void)bus_space_read_1(iot, sxiuartconsioh, SXIUART_IIR);
- splx(s);
-
- cn_tab = &sxiuartcons;
-
- return (0);
-}
-
-int
-sxiuartcngetc(dev_t dev)
-{
- int s;
- uint8_t c;
-
- s = splhigh();
-
- while (!ISSET(bus_space_read_1(sxiuartconsiot, sxiuartconsioh,
- SXIUART_LSR), LSR_RXRDY))
- continue;
- c = bus_space_read_1(sxiuartconsiot, sxiuartconsioh, SXIUART_RBR);
-
- /* clear any pending interrupts */
- (void)bus_space_read_1(sxiuartconsiot, sxiuartconsioh, SXIUART_IIR);
-
- splx(s);
- return (c);
-}
-
-void
-sxiuartcnputc(dev_t dev, int c)
-{
- int s = spltty();
- int timo = 500;
-
- while (!ISSET(bus_space_read_1(sxiuartconsiot, sxiuartconsioh,
- SXIUART_LSR), LSR_THRE) && --timo)
- continue;
-
- bus_space_write_1(sxiuartconsiot, sxiuartconsioh, SXIUART_THR,
- (uint8_t)c);
- bus_space_barrier(sxiuartconsiot, sxiuartconsioh, 0, 1,
- BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE);
-
- splx(s);
-}
-
-void
-sxiuartcnpollc(dev_t dev, int on)
-{
-}
projects / openbsd / commitdiff