static void aju_ac_callout(void *arg) { struct altera_jtag_uart_softc *sc = arg; struct tty *tp = sc->ajus_ttyp; uint32_t v; tty_lock(tp); AJU_LOCK(sc); v = aju_control_read(sc); if (v & ALTERA_JTAG_UART_CONTROL_AC) { v &= ~ALTERA_JTAG_UART_CONTROL_AC; aju_control_write(sc, v); if (*sc->ajus_jtag_presentp == 0) { *sc->ajus_jtag_missedp = 0; *sc->ajus_jtag_presentp = 1; aju_handle_output(sc, tp); } } else if (*sc->ajus_jtag_presentp != 0) { (*sc->ajus_jtag_missedp)++; if (*sc->ajus_jtag_missedp >= AJU_JTAG_MAXMISS) { *sc->ajus_jtag_presentp = 0; aju_handle_output(sc, tp); } } callout_reset(&sc->ajus_ac_callout, AJU_AC_POLLINTERVAL, aju_ac_callout, sc); AJU_UNLOCK(sc); tty_unlock(tp); }
static void aju_intr_disable(struct altera_jtag_uart_softc *sc) { uint32_t v; AJU_LOCK_ASSERT(sc); v = aju_control_read(sc); v &= ~(ALTERA_JTAG_UART_CONTROL_RE | ALTERA_JTAG_UART_CONTROL_WE); aju_control_write(sc, v); }
static void aju_intr_writable_disable(struct altera_jtag_uart_softc *sc) { uint32_t v; AJU_LOCK_ASSERT(sc); atomic_add_int(&aju_intr_writable_disabled, 1); v = aju_control_read(sc); v &= ~ALTERA_JTAG_UART_CONTROL_WE; aju_control_write(sc, v); }
static void aju_ac_callout(void *arg) { struct altera_jtag_uart_softc *sc = arg; struct tty *tp = sc->ajus_ttyp; uint32_t v; tty_lock(tp); AJU_LOCK(sc); v = aju_control_read(sc); if (v & ALTERA_JTAG_UART_CONTROL_AC) { v &= ~ALTERA_JTAG_UART_CONTROL_AC; aju_control_write(sc, v); if (*sc->ajus_jtag_presentp == 0) { *sc->ajus_jtag_presentp = 1; atomic_add_int(&aju_jtag_appeared, 1); aju_handle_output(sc, tp); } /* Any hit eliminates all recent misses. */ *sc->ajus_jtag_missedp = 0; } else if (*sc->ajus_jtag_presentp != 0) { /* * If we've exceeded our tolerance for misses, mark JTAG as * disconnected and drain output. Otherwise, bump the miss * counter. */ if (*sc->ajus_jtag_missedp > AJU_JTAG_MAXMISS) { *sc->ajus_jtag_presentp = 0; atomic_add_int(&aju_jtag_vanished, 1); aju_handle_output(sc, tp); } else (*sc->ajus_jtag_missedp)++; } callout_reset(&sc->ajus_ac_callout, AJU_AC_POLLINTERVAL, aju_ac_callout, sc); AJU_UNLOCK(sc); tty_unlock(tp); }