# Atmel SAM Ethernet (GMAC) driver configuration options

# Copyright (c) 2016 Piotr Mienkowski
# SPDX-License-Identifier: Apache-2.0

menuconfig ETH_SAM_GMAC
	bool "Atmel SAM Ethernet driver"
	default y
	depends on NET_BUF_FIXED_DATA_SIZE
	depends on DT_HAS_ATMEL_SAM_GMAC_ENABLED || \
		   DT_HAS_ATMEL_SAM0_GMAC_ENABLED
	select NOCACHE_MEMORY if ARCH_HAS_NOCACHE_MEMORY_SUPPORT
	select MDIO
	select ETH_DSA_SUPPORT
	select PINCTRL
	help
	  Enable Atmel SAM MCU Family Ethernet driver.

if ETH_SAM_GMAC

# Workaround for not being able to have commas in macro arguments
DT_ETH_SAM_GMAC_PATH := $(dt_nodelabel_path,gmac)

# Just for readability, to keep the following lines shorter.
DT_ETH_SAM_GMAC_NQ := $(dt_node_int_prop_int,$(DT_ETH_SAM_GMAC_PATH),num-queues)

config ETH_SAM_GMAC_QUEUES
	int "Number of active hardware TX and RX queues"
	default 1
	range 1 $(DT_ETH_SAM_GMAC_NQ) if SOC_SERIES_SAME70 || \
						SOC_SERIES_SAMV71 || \
						SOC_SERIES_SAM4E || \
						SOC_SERIES_SAME54
	help
	  Select the number of hardware queues used by the driver. Packets will be
	  routed to appropriate queues based on their priority.

config ETH_SAM_GMAC_FORCE_QUEUE
	bool "Force all traffic to be routed through a specific queue"
	depends on ETH_SAM_GMAC_QUEUES > 1
	depends on NET_TC_RX_COUNT < 5
	help
	  This option is meant to be used only for debugging. Use it to force all
	  traffic to be routed through a specific hardware queue. With this enabled
	  it is easier to verify whether the chosen hardware queue actually works.
	  This works only if there are four or fewer RX traffic classes enabled, as
	  the SAM GMAC hardware supports screening up to four traffic classes.

config ETH_SAM_GMAC_FORCED_QUEUE
	int "Queue to force the packets to"
	depends on ETH_SAM_GMAC_FORCE_QUEUE
	default 0
	range 0 1 if ETH_SAM_GMAC_QUEUES = 2
	range 0 2 if ETH_SAM_GMAC_QUEUES = 3
	range 0 3 if ETH_SAM_GMAC_QUEUES = 4
	range 0 4 if ETH_SAM_GMAC_QUEUES = 5
	range 0 5 if ETH_SAM_GMAC_QUEUES = 6
	help
	  Which queue to force the routing to. This affects both the TX and RX queues
	  setup.

config ETH_SAM_GMAC_BUF_RX_COUNT
	int "Network RX buffers preallocated by the SAM ETH driver"
	default 12
	help
	  Number of network buffers that will be permanently allocated by the
	  Ethernet driver. These buffers are used in receive path. They are
	  preallocated by the driver and made available to the GMAC module to be
	  filled in with incoming data. Their number has to be large enough to fit
	  at least one complete Ethernet frame. SAM ETH driver will always allocate
	  that amount of buffers for itself thus reducing the NET_BUF_RX_COUNT
	  which is a total amount of RX data buffers used by the whole networking
	  stack. One has to ensure that NET_PKT_RX_COUNT is large enough to
	  fit at least two Ethernet frames: one being received by the GMAC module
	  and the other being processed by the higher layer networking stack.

config ETH_SAM_GMAC_MAC_I2C_EEPROM
	bool "Read from an I2C EEPROM"
	help
	  Read MAC address from an I2C EEPROM.

if ETH_SAM_GMAC_MAC_I2C_EEPROM

config ETH_SAM_GMAC_MAC_I2C_INT_ADDRESS
	hex "I2C EEPROM internal address"
	range 0 0xffffffff
	help
	  Internal address of the EEPROM chip where the MAC address is stored.
	  Chips with 1 to 4 byte internal address size are supported. Address
	  size has to be configured in a separate Kconfig option.

config ETH_SAM_GMAC_MAC_I2C_INT_ADDRESS_SIZE
	int "I2C EEPROM internal address size"
	default 1
	range 1 4
	help
	  Size (in bytes) of the internal EEPROM address.

endif # ETH_SAM_GMAC_MAC_I2C_EEPROM

config PTP_CLOCK_SAM_GMAC
	bool "SAM GMAC PTP clock driver support"
	default y
	depends on PTP_CLOCK
	help
	  Enable SAM GMAC PTP Clock support.

endif # ETH_SAM_GMAC