Add tuh_rhport_is_active() and tuh_rhport_reset_bus()

- also improve ehci bus reset
- seperate bus reset delay and contact debouncing delay in enumeration

src/portable/chipidea/ci_hs/hcd_ci_hs.c

@@ -39,24 +39,27 @@
 #include "ci_hs_type.h"
 
 #if CFG_TUSB_MCU == OPT_MCU_MIMXRT1XXX
-  #include "ci_hs_imxrt.h"
 
-  bool hcd_dcache_clean(void const* addr, uint32_t data_size) {
-    return imxrt_dcache_clean(addr, data_size);
-  }
+#include "ci_hs_imxrt.h"
 
-  bool hcd_dcache_invalidate(void const* addr, uint32_t data_size) {
-    return imxrt_dcache_invalidate(addr, data_size);
-  }
+bool hcd_dcache_clean(void const* addr, uint32_t data_size) {
+  return imxrt_dcache_clean(addr, data_size);
+}
 
-  bool hcd_dcache_clean_invalidate(void const* addr, uint32_t data_size) {
-    return imxrt_dcache_clean_invalidate(addr, data_size);
-  }
+bool hcd_dcache_invalidate(void const* addr, uint32_t data_size) {
+  return imxrt_dcache_invalidate(addr, data_size);
+}
+
+bool hcd_dcache_clean_invalidate(void const* addr, uint32_t data_size) {
+  return imxrt_dcache_clean_invalidate(addr, data_size);
+}
 
 #elif TU_CHECK_MCU(OPT_MCU_LPC18XX, OPT_MCU_LPC43XX)
-  #include "ci_hs_lpc18_43.h"
+
+#include "ci_hs_lpc18_43.h"
+
 #else
-  #error "Unsupported MCUs"
+#error "Unsupported MCUs"
 #endif
 
 //--------------------------------------------------------------------+
@@ -67,25 +70,25 @@
 // Controller API
 //--------------------------------------------------------------------+
 
-bool hcd_init(uint8_t rhport)
-{
-  ci_hs_regs_t* hcd_reg = CI_HS_REG(rhport);
+bool hcd_init(uint8_t rhport) {
+  ci_hs_regs_t *hcd_reg = CI_HS_REG(rhport);
 
   // Reset controller
   hcd_reg->USBCMD |= USBCMD_RESET;
-  while( hcd_reg->USBCMD & USBCMD_RESET ) {}
+  while ( hcd_reg->USBCMD & USBCMD_RESET ) {}
 
   // Set mode to device, must be set immediately after reset
 #if CFG_TUSB_MCU == OPT_MCU_LPC18XX || CFG_TUSB_MCU == OPT_MCU_LPC43XX
   // LPC18XX/43XX need to set VBUS Power Select to HIGH
   // RHPORT1 is fullspeed only (need external PHY for Highspeed)
   hcd_reg->USBMODE = USBMODE_CM_HOST | USBMODE_VBUS_POWER_SELECT;
-  if (rhport == 1) hcd_reg->PORTSC1 |= PORTSC1_FORCE_FULL_SPEED;
+  if ( rhport == 1 ) hcd_reg->PORTSC1 |= PORTSC1_FORCE_FULL_SPEED;
 #else
   hcd_reg->USBMODE = USBMODE_CM_HOST;
 #endif
 
   // FIXME force full speed, still have issue with Highspeed enumeration
+  // probably due to physical connection bouncing when plug/unplug
   // 1. Have issue when plug/unplug devices, maybe the port is not reset properly
   // 2. Also does not seems to detect disconnection
   hcd_reg->PORTSC1 |= PORTSC1_FORCE_FULL_SPEED;
@@ -93,13 +96,11 @@ bool hcd_init(uint8_t rhport)
   return ehci_init(rhport, (uint32_t) &hcd_reg->CAPLENGTH, (uint32_t) &hcd_reg->USBCMD);
 }
 
-void hcd_int_enable(uint8_t rhport)
-{
+void hcd_int_enable(uint8_t rhport) {
   CI_HCD_INT_ENABLE(rhport);
 }
 
-void hcd_int_disable(uint8_t rhport)
-{
+void hcd_int_disable(uint8_t rhport) {
   CI_HCD_INT_DISABLE(rhport);
 }
 

src/portable/ehci/ehci.c

@@ -188,6 +188,11 @@ void hcd_port_reset(uint8_t rhport)
 
   ehci_registers_t* regs = ehci_data.regs;
 
+  // skip if already in reset
+  if (regs->portsc_bm.port_reset) {
+    return;
+  }
+
   // mask out Write-1-to-Clear bits
   uint32_t portsc = regs->portsc & ~EHCI_PORTSC_MASK_W1C;
 
@@ -202,16 +207,18 @@ void hcd_port_reset(uint8_t rhport)
 void hcd_port_reset_end(uint8_t rhport)
 {
   (void) rhport;
-
-#if 0 // TODO check if this is necessary
   ehci_registers_t* regs = ehci_data.regs;
 
+  // skip if reset is already complete
+  if (!regs->portsc_bm.port_reset) {
+    return;
+  }
+
   // mask out all change bits since they are Write 1 to clear
-  uint32_t portsc = regs->portsc & ~EHCI_PORTSC_MASK_CHANGE_ALL;
-  portsc &= ~(EHCI_PORTSC_MASK_PORT_RESET);
+  uint32_t portsc = regs->portsc & ~EHCI_PORTSC_MASK_W1C;
+  portsc &= ~EHCI_PORTSC_MASK_PORT_RESET;
 
   regs->portsc = portsc;
-#endif
 }
 
 bool hcd_port_connect_status(uint8_t rhport)
@@ -426,6 +433,11 @@ bool hcd_setup_send(uint8_t rhport, uint8_t dev_addr, uint8_t const setup_packet
 
   hcd_dcache_clean(setup_packet, 8);
 
+  // Control endpoint never be stalled. Skip reset Data Toggle since it is fixed per stage
+  if (qhd->qtd_overlay.halted) {
+    qhd->qtd_overlay.halted = false;
+  }
+
   // attach TD to QHD -> start transferring
   qhd_attach_qtd(qhd, td);
 
@@ -662,7 +674,7 @@ void hcd_int_handler(uint8_t rhport)
   if (int_status & EHCI_INT_MASK_PORT_CHANGE) {
     // Including: Force port resume, over-current change, enable/disable change and connect status change.
     uint32_t const port_status = regs->portsc & EHCI_PORTSC_MASK_W1C;
-    print_portsc(regs);
+    // print_portsc(regs);
 
     if (regs->portsc_bm.connect_status_change) {
       port_connect_status_change_isr(rhport);