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[Bug] Restore usb suspend wakeup delay #21676

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merged 2 commits into from
Aug 2, 2023
Merged

[Bug] Restore usb suspend wakeup delay #21676

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0de58d5
Respect USB_SUSPEND_WAKEUP_DELAY on wakeup
KarlK90 Jul 25, 2023
1275bdc
Remove old, unused and commented testing code
KarlK90 Aug 2, 2023
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31 changes: 8 additions & 23 deletions tmk_core/protocol/chibios/chibios.c
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Original file line number Diff line number Diff line change
Expand Up @@ -80,26 +80,6 @@ void console_task(void);
void midi_ep_task(void);
#endif

/* TESTING
* Amber LED blinker thread, times are in milliseconds.
*/
/* set this variable to non-zero anywhere to blink once */
// static THD_WORKING_AREA(waThread1, 128);
// static THD_FUNCTION(Thread1, arg) {

// (void)arg;
// chRegSetThreadName("blinker");
// while (true) {
// systime_t time;

// time = USB_DRIVER.state == USB_ACTIVE ? 250 : 500;
// palClearLine(LINE_CAPS_LOCK);
// chSysPolledDelayX(MS2RTC(STM32_HCLK, time));
// palSetLine(LINE_CAPS_LOCK);
// chSysPolledDelayX(MS2RTC(STM32_HCLK, time));
// }
// }

/* Early initialisation
*/
__attribute__((weak)) void early_hardware_init_pre(void) {
Expand Down Expand Up @@ -135,9 +115,6 @@ void boardInit(void) {

void protocol_setup(void) {
usb_device_state_init();

// TESTING
// chThdCreateStatic(waThread1, sizeof(waThread1), NORMALPRIO, Thread1, NULL);
}

static host_driver_t *driver = NULL;
Expand Down Expand Up @@ -189,6 +166,14 @@ void protocol_pre_task(void) {
/* issue a remote wakeup event to the host which should resume
* the bus and get our keyboard out of suspension. */
usbWakeupHost(&USB_DRIVER);
# if USB_SUSPEND_WAKEUP_DELAY > 0
/* Some hubs, kvm switches, and monitors do weird things, with
* USB device state bouncing around wildly on wakeup, yielding
* race conditions that can corrupt the keyboard state.
*
* Pause for a while to let things settle... */
wait_ms(USB_SUSPEND_WAKEUP_DELAY);
# endif
}
}
/* after a successful wakeup a USB_EVENT_WAKEUP is signaled to QMK by
Expand Down
27 changes: 6 additions & 21 deletions tmk_core/protocol/chibios/usb_main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -784,34 +784,19 @@ void init_usb_driver(USBDriver *usbp) {
#endif
}

/*
* Activates the USB driver and then the USB bus pull-up on D+.
* Note, a delay is inserted in order to not have to disconnect the cable
* after a reset.
*/
usbDisconnectBus(usbp);
usbStop(usbp);
wait_ms(50);
usbStart(usbp, &usbcfg);
usbConnectBus(usbp);
restart_usb_driver(usbp);

chVTObjectInit(&keyboard_idle_timer);
}

/** @brief Restarts the USB driver and emulates a physical bus reconnection.
* Note that the bus reconnection is MCU and even board specific, so it might
* be a NOP on some hardware platforms.
*/
__attribute__((weak)) void restart_usb_driver(USBDriver *usbp) {
usbDisconnectBus(usbp);
usbStop(usbp);

#if USB_SUSPEND_WAKEUP_DELAY > 0
// Some hubs, kvm switches, and monitors do
// weird things, with USB device state bouncing
// around wildly on wakeup, yielding race
// conditions that can corrupt the keyboard state.
//
// Pause for a while to let things settle...
wait_ms(USB_SUSPEND_WAKEUP_DELAY);
#endif

wait_ms(50);
usbStart(usbp, &usbcfg);
usbConnectBus(usbp);
}
Expand Down