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drivers: udc: add new UDC driver for SAM0 USB controller

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The UDC driver for this beautiful USB controller is mostly rewritten
from scratch. USB Pad Calibration and clock handling are copied from the
usb_dc_sam0 driver.

The driver uses multipacket transfers for all endpoints except the OUT
control endpoint. The OUT control endpoint has a buffer that is always
mapped to the endpoint buffer register so that it always has a valid
buffer. The driver provides up to 7 IN and 7 OUT endpoints that support
any type of transfer. Double buffering is not used, for the possible
case of isochronous transfers some changes would be required in the
future.

Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>
This commit is contained in:
Johann Fischer 2025-02-26 22:14:56 +01:00 • committed by Benjamin Cabé
commit c8eaa11a0b
4 changed files with 1287 additions and 0 deletions
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1
drivers/usb/udc/CMakeLists.txt
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@ -21,3 +21,4 @@ zephyr_library_sources_ifdef(CONFIG_UDC_RPI_PICO udc_rpi_pico.c)
zephyr_library_sources_ifdef(CONFIG_UDC_AMBIQ udc_ambiq.c)
zephyr_library_sources_ifdef(CONFIG_UDC_RENESAS_RA udc_renesas_ra.c)
zephyr_library_sources_ifdef(CONFIG_UDC_MAX32 udc_max32.c)
zephyr_library_sources_ifdef(CONFIG_UDC_SAM0 udc_sam0.c)

1
drivers/usb/udc/Kconfig
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@ -78,5 +78,6 @@ source "drivers/usb/udc/Kconfig.rpi_pico"
source "drivers/usb/udc/Kconfig.ambiq"
source "drivers/usb/udc/Kconfig.renesas_ra"
source "drivers/usb/udc/Kconfig.max32"
source "drivers/usb/udc/Kconfig.sam0"
endif # UDC_DRIVER

28
drivers/usb/udc/Kconfig.sam0 Normal file
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@ -0,0 +1,28 @@
# Copyright (c) 2025 Nordic Semiconductor ASA
# SPDX-License-Identifier: Apache-2.0
config UDC_SAM0
bool "Driver for SAM0 family USB device controller"
default y
depends on DT_HAS_ATMEL_SAM0_USB_ENABLED
select PINCTRL
select SYS_MEM_BLOCKS
select EVENTS
help
Driver for SAM0 family USB device controller.
if UDC_SAM0
config UDC_SAM0_STACK_SIZE
int "UDC controller driver internal thread stack size"
default 512
help
Device controller driver internal thread stack size.
config UDC_SAM0_THREAD_PRIORITY
int "UDC controller driver thread priority"
default 8
help
Device controller driver thread priority.
endif # UDC_SAM0

1257
drivers/usb/udc/udc_sam0.c Normal file
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