pkg/tinyusb: add SAM0-based MCU support

Signed-off-by: Dylan Laduranty <dylan.laduranty@mesotic.com>

pkg/tinyusb/Makefile

@@ -71,6 +71,9 @@ tinyusb_host:
 tinyusb_portable_espressif:
 	$(QQ)"$(MAKE)" -C $(PSRC)/portable/espressif/esp32sx -f $(RIOTBASE)/Makefile.base MODULE=$@
 
+tinyusb_portable_microchip:
+	$(QQ)"$(MAKE)" -C $(PSRC)/portable/microchip/samd -f $(RIOTBASE)/Makefile.base MODULE=$@
+
 tinyusb_portable_stm32_fsdev:
 	$(QQ)"$(MAKE)" -C $(PSRC)/portable/st/stm32_fsdev -f $(RIOTBASE)/Makefile.base MODULE=$@
 

pkg/tinyusb/Makefile.dep

@@ -54,6 +54,8 @@ endif
 # tinyUSB hardware driver selection
 ifneq (,$(filter esp32s2 esp32s3,$(CPU_FAM)))
   USEMODULE += tinyusb_portable_espressif
+else ifneq (,$(filter saml21 samd5x samd21,$(CPU)))
+  USEMODULE += tinyusb_portable_microchip
 else ifeq (stm32,$(CPU))
   ifneq (,$(filter f2 f4 f7 h7 l4,$(CPU_FAM)))
     USEMODULE += tinyusb_portable_synopsys_dwc2

pkg/tinyusb/Makefile.include

@@ -12,6 +12,12 @@ else ifeq (esp32s3,$(CPU_FAM))
   CFLAGS += -DCFG_TUSB_MCU=OPT_MCU_ESP32S3
 else ifeq (stm32,$(CPU))
   CFLAGS += -DCFG_TUSB_MCU=OPT_MCU_STM32$(call uppercase_and_underscore,$(CPU_FAM))
+else ifeq (saml21,$(CPU))
+  CFLAGS += -DCFG_TUSB_MCU=OPT_MCU_SAML21
+else ifeq (samd21,$(CPU))
+  CFLAGS += -DCFG_TUSB_MCU=OPT_MCU_SAMD21
+else ifeq (samd5x,$(CPU))
+  CFLAGS += -DCFG_TUSB_MCU=OPT_MCU_SAME5X
 else
   $(error CPU $(CPU) or CPU family $(CPU_FAM) not supported)
 endif

pkg/tinyusb/hw/Makefile

@@ -1,5 +1,9 @@
 MODULE = tinyusb_hw
 
-SRC = hw_$(CPU).c
+ifneq (,$(filter saml21 samd5x samd21,$(CPU)))
+  SRC = hw_sam0.c
+else
+  SRC = hw_$(CPU).c
+endif
 
 include $(RIOTBASE)/Makefile.base

pkg/tinyusb/hw/hw_sam0.c

@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2022 Mesotic SAS
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     pkg_tinyusb
+ * @brief
+ * @{
+ *
+ * @brief       tinyUSB hardware driver for SAM0 MCUs
+ * @author      Dylan Laduranty <dylan.laduranty@mesotic.com>
+ */
+
+#include <errno.h>
+
+#include "periph_conf.h"
+#include "periph/gpio.h"
+#include "pm_layered.h"
+#include "log.h"
+#include "tusb.h"
+#include "device/usbd.h"
+#include "host/usbh.h"
+
+int tinyusb_hw_init(void)
+{
+    /* Initialize GPIO pins */
+    gpio_init(sam_usbdev_config[0].dp, GPIO_IN);
+    gpio_init(sam_usbdev_config[0].dm, GPIO_IN);
+    gpio_init_mux(sam_usbdev_config[0].dm, sam_usbdev_config[0].d_mux);
+    gpio_init_mux(sam_usbdev_config[0].dp, sam_usbdev_config[0].d_mux);
+
+    /* Initialize clocks */
+    sam0_gclk_enable(sam_usbdev_config[0].gclk_src);
+
+#if defined(MCLK)
+    MCLK->AHBMASK.reg |= MCLK_AHBMASK_USB;
+    MCLK->APBBMASK.reg |= MCLK_APBBMASK_USB;
+#else
+    PM->AHBMASK.reg |= PM_AHBMASK_USB;
+    PM->APBBMASK.reg |= PM_APBBMASK_USB;
+#endif
+
+#if defined(CPU_COMMON_SAMD21)
+    GCLK->CLKCTRL.reg = GCLK_CLKCTRL_CLKEN
+                        | GCLK_CLKCTRL_GEN(sam_usbdev_config[0].gclk_src)
+                        | GCLK_CLKCTRL_ID(USB_GCLK_ID);
+    pm_block(SAMD21_PM_IDLE_1);
+#else
+    GCLK->PCHCTRL[USB_GCLK_ID].reg = GCLK_PCHCTRL_CHEN
+                                   | GCLK_PCHCTRL_GEN(sam_usbdev_config[0].gclk_src);
+#endif
+
+    return 0;
+}
+
+void isr_usb(void)
+{
+    /* call device interrupt handler with the first device */
+    if (IS_USED(MODULE_TINYUSB_DEVICE)) {
+        tud_int_handler(TINYUSB_TUD_RHPORT);
+    }
+
+    /* call host interrupt handler with the first device */
+    if (IS_USED(MODULE_TINYUSB_HOST)) {
+        tuh_int_handler(TINYUSB_TUH_RHPORT);
+    }
+
+    cortexm_isr_end();
+}
+
+void isr_usb0(void)
+{
+    isr_usb();
+}
+
+void isr_usb1(void)
+{
+    isr_usb();
+}
+void isr_usb2(void)
+{
+    isr_usb();
+}
+void isr_usb3(void)
+{
+    isr_usb();
+}