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https://github.com/freebsd/freebsd-src.git
synced 2024-12-01 02:03:31 +00:00
Detect when we are polling from kernel via cngetc() in the boot process and
reserve the keypresses so they do not get passed to syscons. Submitted by: Hans Petter Selasky
This commit is contained in:
Andrew Thompson
parent
8e7e6335bc
commit
1bdb81f124
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=203896
@ -151,6 +151,7 @@ struct ukbd_softc {
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struct ukbd_data sc_ndata;
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struct ukbd_data sc_odata;
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struct thread *sc_poll_thread;
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struct usb_device *sc_udev;
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struct usb_interface *sc_iface;
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struct usb_xfer *sc_xfer[UKBD_N_TRANSFER];
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@ -174,9 +175,10 @@ struct ukbd_softc {
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#define UKBD_FLAG_APPLE_SWAP 0x0100
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#define UKBD_FLAG_TIMER_RUNNING 0x0200
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int32_t sc_mode; /* input mode (K_XLATE,K_RAW,K_CODE) */
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int32_t sc_state; /* shift/lock key state */
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int32_t sc_accents; /* accent key index (> 0) */
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int sc_mode; /* input mode (K_XLATE,K_RAW,K_CODE) */
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int sc_state; /* shift/lock key state */
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int sc_accents; /* accent key index (> 0) */
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int sc_poll_tick_last;
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uint16_t sc_inputs;
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uint16_t sc_inputhead;
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@ -187,6 +189,7 @@ struct ukbd_softc {
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uint8_t sc_iface_no;
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uint8_t sc_kbd_id;
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uint8_t sc_led_id;
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uint8_t sc_poll_detected;
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};
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#define KEY_ERROR 0x01
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@ -281,6 +284,9 @@ static int ukbd_ioctl(keyboard_t *, u_long, caddr_t);
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static int ukbd_enable(keyboard_t *);
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static int ukbd_disable(keyboard_t *);
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static void ukbd_interrupt(struct ukbd_softc *);
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static int ukbd_is_polling(struct ukbd_softc *);
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static int ukbd_polls_other_thread(struct ukbd_softc *);
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static void ukbd_event_keyinput(struct ukbd_softc *);
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static device_probe_t ukbd_probe;
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static device_attach_t ukbd_attach;
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@ -331,8 +337,21 @@ ukbd_do_poll(struct ukbd_softc *sc, uint8_t wait)
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{
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DPRINTFN(2, "polling\n");
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if (kdb_active == 0)
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/* update stats about last polling event */
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sc->sc_poll_tick_last = ticks;
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sc->sc_poll_detected = 1;
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if (kdb_active == 0) {
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while (sc->sc_inputs == 0) {
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/* make sure the USB code gets a chance to run */
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pause("UKBD", 1);
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/* check if we should wait */
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if (!wait)
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break;
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}
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return; /* Only poll if KDB is active */
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}
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while (sc->sc_inputs == 0) {
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@ -366,9 +385,13 @@ ukbd_get_key(struct ukbd_softc *sc, uint8_t wait)
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/* start transfer, if not already started */
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usbd_transfer_start(sc->sc_xfer[UKBD_INTR_DT]);
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}
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if (sc->sc_flags & UKBD_FLAG_POLLING) {
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if (ukbd_polls_other_thread(sc))
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return (-1);
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if (sc->sc_flags & UKBD_FLAG_POLLING)
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ukbd_do_poll(sc, wait);
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}
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if (sc->sc_inputs == 0) {
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c = -1;
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} else {
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@ -389,14 +412,13 @@ ukbd_interrupt(struct ukbd_softc *sc)
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uint32_t o_mod;
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uint32_t now = sc->sc_time_ms;
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uint32_t dtime;
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uint32_t c;
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uint8_t key;
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uint8_t i;
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uint8_t j;
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if (sc->sc_ndata.keycode[0] == KEY_ERROR) {
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goto done;
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}
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if (sc->sc_ndata.keycode[0] == KEY_ERROR)
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return;
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n_mod = sc->sc_ndata.modifiers;
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o_mod = sc->sc_odata.modifiers;
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if (n_mod != o_mod) {
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@ -469,14 +491,22 @@ pfound: ;
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sc->sc_odata = sc->sc_ndata;
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bcopy(sc->sc_ntime, sc->sc_otime, sizeof(sc->sc_otime));
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memcpy(sc->sc_otime, sc->sc_ntime, sizeof(sc->sc_otime));
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ukbd_event_keyinput(sc);
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}
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static void
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ukbd_event_keyinput(struct ukbd_softc *sc)
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{
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int c;
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if (ukbd_is_polling(sc))
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return;
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if (sc->sc_inputs == 0)
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return;
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if (sc->sc_inputs == 0) {
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goto done;
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}
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if (sc->sc_flags & UKBD_FLAG_POLLING) {
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goto done;
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}
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if (KBD_IS_ACTIVE(&sc->sc_kbd) &&
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KBD_IS_BUSY(&sc->sc_kbd)) {
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/* let the callback function process the input */
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@ -488,8 +518,6 @@ pfound: ;
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c = ukbd_read_char(&sc->sc_kbd, 0);
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} while (c != NOKEY);
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}
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done:
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return;
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}
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static void
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@ -499,12 +527,14 @@ ukbd_timeout(void *arg)
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mtx_assert(&Giant, MA_OWNED);
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if (!(sc->sc_flags & UKBD_FLAG_POLLING)) {
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sc->sc_time_ms += 25; /* milliseconds */
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}
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sc->sc_time_ms += 25; /* milliseconds */
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ukbd_interrupt(sc);
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if (ukbd_any_key_pressed(sc)) {
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/* Make sure any leftover key events gets read out */
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ukbd_event_keyinput(sc);
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if (ukbd_any_key_pressed(sc) || (sc->sc_inputs != 0)) {
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ukbd_start_timer(sc);
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} else {
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sc->sc_flags &= ~UKBD_FLAG_TIMER_RUNNING;
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@ -837,6 +867,18 @@ ukbd_attach(device_t dev)
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*/
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KBD_PROBE_DONE(kbd);
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/*
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* Set boot protocol if we need the quirk.
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*/
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if (usb_test_quirk(uaa, UQ_KBD_BOOTPROTO)) {
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err = usbd_req_set_protocol(sc->sc_udev, NULL,
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sc->sc_iface_index, 0);
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if (err != USB_ERR_NORMAL_COMPLETION) {
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DPRINTF("set protocol error=%s\n", usbd_errstr(err));
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goto detach;
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}
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}
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/* figure out if there is an ID byte in the data */
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err = usbd_req_get_hid_desc(uaa->device, NULL, &hid_ptr,
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&hid_len, M_TEMP, uaa->info.bIfaceIndex);
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@ -880,10 +922,14 @@ ukbd_attach(device_t dev)
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/* ignore if SETIDLE fails, hence it is not crucial */
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err = usbd_req_set_idle(sc->sc_udev, NULL, sc->sc_iface_index, 0, 0);
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mtx_lock(&Giant);
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ukbd_ioctl(kbd, KDSETLED, (caddr_t)&sc->sc_state);
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KBD_INIT_DONE(kbd);
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mtx_unlock(&Giant);
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if (kbd_register(kbd) < 0) {
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goto detach;
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}
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@ -925,9 +971,8 @@ ukbd_detach(device_t dev)
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DPRINTF("\n");
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if (sc->sc_flags & UKBD_FLAG_POLLING) {
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panic("cannot detach polled keyboard\n");
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}
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mtx_lock(&Giant);
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sc->sc_flags |= UKBD_FLAG_GONE;
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usb_callout_stop(&sc->sc_callout);
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@ -954,6 +999,8 @@ ukbd_detach(device_t dev)
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}
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sc->sc_kbd.kb_flags = 0;
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mtx_unlock(&Giant);
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usbd_transfer_unsetup(sc->sc_xfer, UKBD_N_TRANSFER);
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usb_callout_drain(&sc->sc_callout);
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@ -969,8 +1016,12 @@ ukbd_resume(device_t dev)
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{
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struct ukbd_softc *sc = device_get_softc(dev);
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mtx_lock(&Giant);
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ukbd_clear_state(&sc->sc_kbd);
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mtx_unlock(&Giant);
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return (0);
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}
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@ -1076,13 +1127,19 @@ ukbd_check(keyboard_t *kbd)
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mtx_unlock(&Giant);
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return (retval);
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}
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ukbd_do_poll(sc, 0);
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} else {
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/* XXX the keyboard layer requires Giant */
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if (!mtx_owned(&Giant))
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return (0);
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}
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/* check if key belongs to this thread */
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if (ukbd_polls_other_thread(sc))
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return (0);
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if (sc->sc_flags & UKBD_FLAG_POLLING)
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ukbd_do_poll(sc, 0);
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#ifdef UKBD_EMULATE_ATSCANCODE
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if (sc->sc_buffered_char[0]) {
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return (1);
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@ -1118,6 +1175,10 @@ ukbd_check_char(keyboard_t *kbd)
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return (0);
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}
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/* check if key belongs to this thread */
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if (ukbd_polls_other_thread(sc))
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return (0);
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if ((sc->sc_composed_char > 0) &&
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(!(sc->sc_flags & UKBD_FLAG_COMPOSE))) {
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return (1);
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@ -1156,6 +1217,10 @@ ukbd_read(keyboard_t *kbd, int wait)
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return (-1);
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}
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/* check if key belongs to this thread */
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if (ukbd_polls_other_thread(sc))
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return (-1);
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#ifdef UKBD_EMULATE_ATSCANCODE
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if (sc->sc_buffered_char[0]) {
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scancode = sc->sc_buffered_char[0];
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@ -1220,6 +1285,10 @@ ukbd_read_char(keyboard_t *kbd, int wait)
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return (NOKEY);
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}
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/* check if key belongs to this thread */
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if (ukbd_polls_other_thread(sc))
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return (NOKEY);
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next_code:
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/* do we have a composed char to return ? */
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@ -1419,7 +1488,17 @@ ukbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
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* keyboard system must get out of "Giant" first, before the
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* CPU can proceed here ...
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*/
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return (EINVAL);
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switch (cmd) {
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case KDGKBMODE:
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case KDSKBMODE:
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/* workaround for Geli */
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mtx_lock(&Giant);
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i = ukbd_ioctl(kbd, cmd, arg);
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mtx_unlock(&Giant);
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return (i);
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default:
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return (EINVAL);
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}
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}
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switch (cmd) {
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@ -1445,7 +1524,8 @@ ukbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
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case K_RAW:
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case K_CODE:
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if (sc->sc_mode != *(int *)arg) {
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ukbd_clear_state(kbd);
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if (ukbd_is_polling(sc) == 0)
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ukbd_clear_state(kbd);
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sc->sc_mode = *(int *)arg;
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}
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break;
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@ -1552,7 +1632,11 @@ ukbd_clear_state(keyboard_t *kbd)
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struct ukbd_softc *sc = kbd->kb_data;
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if (!mtx_owned(&Giant)) {
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return; /* XXX */
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/* XXX cludge */
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mtx_lock(&Giant);
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ukbd_clear_state(kbd);
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mtx_unlock(&Giant);
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return;
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}
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sc->sc_flags &= ~(UKBD_FLAG_COMPOSE | UKBD_FLAG_POLLING);
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@ -1563,10 +1647,10 @@ ukbd_clear_state(keyboard_t *kbd)
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sc->sc_buffered_char[0] = 0;
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sc->sc_buffered_char[1] = 0;
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#endif
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bzero(&sc->sc_ndata, sizeof(sc->sc_ndata));
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bzero(&sc->sc_odata, sizeof(sc->sc_odata));
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bzero(&sc->sc_ntime, sizeof(sc->sc_ntime));
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bzero(&sc->sc_otime, sizeof(sc->sc_otime));
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memset(&sc->sc_ndata, 0, sizeof(sc->sc_ndata));
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memset(&sc->sc_odata, 0, sizeof(sc->sc_odata));
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memset(&sc->sc_ntime, 0, sizeof(sc->sc_ntime));
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memset(&sc->sc_otime, 0, sizeof(sc->sc_otime));
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}
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/* save the internal state, not used */
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@ -1583,6 +1667,30 @@ ukbd_set_state(keyboard_t *kbd, void *buf, size_t len)
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return (EINVAL);
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}
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static int
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ukbd_is_polling(struct ukbd_softc *sc)
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{
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int delta;
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if (sc->sc_flags & UKBD_FLAG_POLLING)
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return (1); /* polling */
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delta = ticks - sc->sc_poll_tick_last;
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if ((delta < 0) || (delta >= hz)) {
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sc->sc_poll_detected = 0;
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return (0); /* not polling */
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}
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return (sc->sc_poll_detected);
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}
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static int
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ukbd_polls_other_thread(struct ukbd_softc *sc)
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{
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return (ukbd_is_polling(sc) &&
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(sc->sc_poll_thread != curthread));
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}
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static int
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ukbd_poll(keyboard_t *kbd, int on)
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{
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@ -1599,8 +1707,10 @@ ukbd_poll(keyboard_t *kbd, int on)
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if (on) {
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sc->sc_flags |= UKBD_FLAG_POLLING;
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sc->sc_poll_thread = curthread;
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} else {
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sc->sc_flags &= ~UKBD_FLAG_POLLING;
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ukbd_start_timer(sc); /* start timer */
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}
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return (0);
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}
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