Revert "[Bug] Restore usb suspend wakeup delay (qmk#21676)"

This reverts commit e8e989f.
drashna · Aug 24, 2023 · 5570a16 · 5570a16
1 parent 5d828a9
commit 5570a16
Show file tree

Hide file tree

Showing 2 changed files with 44 additions and 14 deletions.
diff --git a/tmk_core/protocol/chibios/chibios.c b/tmk_core/protocol/chibios/chibios.c
@@ -80,6 +80,26 @@ 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) {
@@ -115,6 +135,9 @@ 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;
@@ -166,14 +189,6 @@ void protocol_pre_task(void) {
             if ((USB_DRIVER.status & USB_GETSTATUS_REMOTE_WAKEUP_ENABLED) && suspend_wakeup_condition()) {
                 usbWakeupHost(&USB_DRIVER);
                 restart_usb_driver(&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
             }
         }
         /* Woken up */

diff --git a/tmk_core/protocol/chibios/usb_main.c b/tmk_core/protocol/chibios/usb_main.c
@@ -784,19 +784,34 @@ void init_usb_driver(USBDriver *usbp) {
 #endif
     }
 
-    restart_usb_driver(usbp);
+    /*
+     * 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);
 
     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);
-    wait_ms(50);
+
+#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
+
     usbStart(usbp, &usbcfg);
     usbConnectBus(usbp);
 }