allow rp2040 to use max3421e as host controller

- fix warnings build hcd max3421 with rp2040
- add tinyusb_host_max3421 target for rp2040 cmake, -DMAX3421_HOST=1
will enable this
- add max3421 driver implementation for rp2040 family
- update tusb_config for host to allow easy enable host selection for
rp2040 (default/pio-usb/max3421)

1 files changed, 35 insertions, 29 deletions

diff --git a/examples/host/bare_api/src/tusb_config.h b/examples/host/bare_api/src/tusb_config.h
index ede9618d3..05ffbdf75 100644
--- a/examples/host/bare_api/src/tusb_config.h
+++ b/examples/host/bare_api/src/tusb_config.h
@@ -30,28 +30,8 @@
  extern "C" {
 #endif
 
-//--------------------------------------------------------------------+
-// Board Specific Configuration
-//--------------------------------------------------------------------+
-
-#if CFG_TUSB_MCU == OPT_MCU_RP2040
-// change to 1 if using pico-pio-usb as host controller for raspberry rp2040
-#define CFG_TUH_RPI_PIO_USB   0
-#define BOARD_TUH_RHPORT      CFG_TUH_RPI_PIO_USB
-#endif
-
-// RHPort number used for host can be defined by board.mk, default to port 0
-#ifndef BOARD_TUH_RHPORT
-#define BOARD_TUH_RHPORT      0
-#endif
-
-// RHPort max operational speed can defined by board.mk
-#ifndef BOARD_TUH_MAX_SPEED
-#define BOARD_TUH_MAX_SPEED   OPT_MODE_DEFAULT_SPEED
-#endif
-
 //--------------------------------------------------------------------
-// COMMON CONFIGURATION
+// Common Configuration
 //--------------------------------------------------------------------
 
 // defined by compiler flags for flexibility
@@ -67,12 +47,6 @@
 #define CFG_TUSB_DEBUG        0
 #endif
 
-// Enable Host stack
-#define CFG_TUH_ENABLED       1
-
-// Default is max speed that hardware controller could support with on-chip PHY
-#define CFG_TUH_MAX_SPEED     BOARD_TUH_MAX_SPEED
-
 /* USB DMA on some MCUs can only access a specific SRAM region with restriction on alignment.
  * Tinyusb use follows macros to declare transferring memory so that they can be put
  * into those specific section.
@@ -85,11 +59,43 @@
 #endif
 
 #ifndef CFG_TUH_MEM_ALIGN
-#define CFG_TUH_MEM_ALIGN        __attribute__ ((aligned(4)))
+#define CFG_TUH_MEM_ALIGN     __attribute__ ((aligned(4)))
+#endif
+
+//--------------------------------------------------------------------
+// Host Configuration
+//--------------------------------------------------------------------
+
+// Enable Host stack
+#define CFG_TUH_ENABLED       1
+
+#if CFG_TUSB_MCU == OPT_MCU_RP2040
+  // #define CFG_TUH_RPI_PIO_USB   1 // use pio-usb as host controller
+  // #define CFG_TUH_RPI_PIO_USB   1 // use max3421 as host controller
+
+  // host roothub port is 1 if using either pio-usb or max3421
+  #if (defined(CFG_TUH_RPI_PIO_USB) && CFG_TUH_RPI_PIO_USB) || (defined(CFG_TUH_MAX3421) && CFG_TUH_MAX3421)
+    #define BOARD_TUH_RHPORT      1
+  #endif
+#endif
+
+// Default is max speed that hardware controller could support with on-chip PHY
+#define CFG_TUH_MAX_SPEED     BOARD_TUH_MAX_SPEED
+
+//------------------------- Board Specific --------------------------
+
+// RHPort number used for host can be defined by board.mk, default to port 0
+#ifndef BOARD_TUH_RHPORT
+#define BOARD_TUH_RHPORT      0
+#endif
+
+// RHPort max operational speed can defined by board.mk
+#ifndef BOARD_TUH_MAX_SPEED
+#define BOARD_TUH_MAX_SPEED   OPT_MODE_DEFAULT_SPEED
 #endif
 
 //--------------------------------------------------------------------
-// CONFIGURATION
+// Driver Configuration
 //--------------------------------------------------------------------
 
 // Size of buffer to hold descriptors and other data used for enumeration