Add STM32L552xE support

Makefile

@@ -201,6 +201,11 @@ stm32l433cc: clean
 						DEFINES='STM32L4 STM32L433xx USBD_SOF_DISABLED' \
 						CFLAGS='-mcpu=cortex-m4'
 
+stm32l552xe: clean
+	@$(MAKE) demo STARTUP='$(CMSISDEV)/ST/STM32L5xx/Source/Templates/gcc/startup_stm32l55sxx.s' \
+						LDSCRIPT='demo/stm32l552xe.ld' \
+						DEFINES='STM32L5 STM32L552xx USBD_SOF_DISABLED' \
+						CFLAGS='-mcpu=cortex-m33'
 
 stm32f070xb: clean
 	@$(MAKE) demo STARTUP='$(CMSISDEV)/ST/STM32F0xx/Source/Templates/gcc/startup_stm32f070xb.s' \

demo/stm32l552xe.ld

@@ -0,0 +1,9 @@
+ENTRY(Reset_Handler)
+MEMORY
+{
+    ROM   (rx): ORIGIN = 0x08000000, LENGTH = 512K
+    RAM  (rwx): ORIGIN = 0x30000000, LENGTH = 192K
+    SRAM (rwx): ORIGIN = 0x0A030000, LENGTH = 16K
+}
+
+INCLUDE sections.ld

inc/usb.h

@@ -61,6 +61,20 @@
     #endif
     #endif
 
+#elif defined(STM32L552xx)
+
+    #define USBD_STM32L552
+
+    #if !defined(__ASSEMBLER__)
+    extern const struct usbd_driver usbd_devfs;
+    extern const struct usbd_driver usbd_devfs_asm;
+    #if defined(USBD_ASM_DRIVER)
+    #define usbd_hw usbd_devfs_asm
+    #else
+    #define usbd_hw usbd_devfs
+    #endif
+    #endif
+
 #elif defined(STM32L1)
 
     #define USBD_STM32L100

readme.md

@@ -73,6 +73,16 @@ All requirements can be downloaded into a directory specified in environment var
         <td>usbd_otgfs</td>
         <td>usbd_stm32l476_otgfs.c</td>
     </tr>
+    <tr>
+        <td rowspan="2">STM32L552</td>
+        <td nowrap rowspan="2">Doublebuffered<sup>[2]</sup><br />8<sup>[1]</sup> endpoints<br /> BC1.2</td>
+        <td>usbd_devfs</td>
+        <td>usbd_stm32l552_devfs.c</td>
+    </tr>
+    <tr>
+        <td>usbd_devfs_asm</td>
+        <td>usbd_stm32l552_devfs_asm.S</td>
+    </tr>
     <tr>
         <td>STM32F401 STM32F411</td>
         <td nowrap>Doublebuffered<br/>4 endpoints<br/>VBUS detection<br/>SOF output</td>

src/memmap.inc

@@ -71,6 +71,23 @@
     #define UID_BASE        0x1FFF7590
     #define RCC_USBEN       26
 
+#elif defined(STM32L552xx)
+
+    #define USB_EPBASE      0x4000D400
+    #define USB_REGBASE     0x4000D440
+    #define USB_CNTR        0x00
+    #define USB_ISTR        0x04
+    #define USB_FNR         0x08
+    #define USB_DADDR       0x0C
+    #define USB_BTABLE      0x10
+    #define USB_BCDR        0x18
+    #define USB_PMABASE     0x4000D800
+    #define RCC_BASE        0x40021000
+    #define RCC_APB1RSTR2   0x3C
+    #define RCC_APB1ENR2    0x5C
+    #define UID_BASE        0x0BFA0590
+    #define RCC_USBEN       21
+
 #elif defined(STM32G4)
 
     #define USB_EPBASE      0x40005C00