f66930fd3e
Enabled Async API feature for ns16550 driver using DMA support. Signed-off-by: Anisetti Avinash Krishna <anisetti.avinash.krishna@intel.com>
102 lines
3.1 KiB
Plaintext
102 lines
3.1 KiB
Plaintext
# SPDX-License-Identifier: Apache-2.0
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menuconfig UART_NS16550
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bool "NS16550 serial driver"
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default y
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depends on DT_HAS_NS16550_ENABLED
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select SERIAL_HAS_DRIVER
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select SERIAL_SUPPORT_INTERRUPT
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help
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This option enables the NS16550 serial driver.
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This driver can be used for the serial hardware
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available on x86 boards.
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if UART_NS16550
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config UART_NS16550_LINE_CTRL
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bool "Serial Line Control for Apps"
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depends on UART_LINE_CTRL
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help
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This enables the API for apps to control the serial line,
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such as CTS and RTS.
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Says n if not sure.
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config UART_NS16550_DRV_CMD
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bool "Driver Commands"
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depends on UART_DRV_CMD
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help
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This enables the API for apps to send commands to driver.
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Says n if not sure.
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config UART_NS16550_INTEL_LPSS_DMA
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bool "INTEL LPSS support for NS16550"
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select SERIAL_SUPPORT_ASYNC
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select DMA if UART_ASYNC_API
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help
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This enables the usage of INTEL LPSS internal DMA for Async operations.
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choice UART_NS16550_VARIANT
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prompt "UART variant"
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default UART_NS16550_VARIANT_NS16550
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help
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Select UART device variant
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config UART_NS16550_VARIANT_NS16550
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bool "UART 16550 (16-bytes FIFO)"
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help
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This enables support for 16-bytes FIFO if UART controller is 16550.
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config UART_NS16550_VARIANT_NS16750
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bool "UART 16750 (64-bytes FIFO and auto flow control)"
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help
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This enables support for 64-bytes FIFO and automatic hardware
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flow control if UART controller is 16750.
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config UART_NS16550_VARIANT_NS16950
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bool "UART 16950 (128-bytes FIFO and auto flow control)"
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help
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This enables support for 128-bytes FIFO and automatic hardware flow control.
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endchoice
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config UART_NS16550_ACCESS_WORD_ONLY
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bool "NS16550 only allows word access"
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help
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In some case, e.g. ARC HS Development kit, the peripheral space of ns
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16550 (DesignWare UART) only allows word access, byte access will raise
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exception.
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config UART_NS16550_TI_K3
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bool "Add support for NS16550 variant specific to TI K3 SoCs"
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help
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Enabling this configuration allows the users to use the UART port in
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Texas Instruments K3 SoCs by enabling a vendor specific extended register
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set.
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config UART_NS16550_ITE_HIGH_SPEED_BUADRATE
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bool "IT8XXX2 specific baud rate configuration"
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help
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Enable IT8XXX2 specific baud rate configuration.
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This applies to high-speed baud rate configuration.
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menu "NS16550 Workarounds"
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config UART_NS16550_WA_ISR_REENABLE_INTERRUPT
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bool "Re-enable interrupts by toggling IER at end of ISR"
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depends on UART_INTERRUPT_DRIVEN
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help
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In some configurations (e.g. edge interrupt triggers),
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an interruptible event occurs during ISR and the host interrupt
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controller does not see the new event due to IIR is constantly
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asserting interrupts. For example, the callback handles RX and
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then TX. If another character comes in before end of TX processing
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(TX interrupt still asserts while raising RX interrupt), the host
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interrupt controller may not see this new event. So if needed,
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the IER is being toggled to re-assert interrupts at the end of ISR
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to nudge the host interrupt controller to fire the ISR again.
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endmenu
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endif # UART_NS16550
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