Justin Hibbits 09ef538713 uart: Add primitive noise filtering on RX ... A long cable attached to the UART can act as an antenna if disconnected from the other end. This can cause noise on the receive side, possibly as reflections from the transmit side, leading to an interrupt storm. Filter this by adding a threshold of received characters without TX ready, above which characters are dropped. This is disabled by default, but has been tested with a threshold of 1000+. A high threshold is recommended to avoid dropping characters during, for instance, a large copy/paste from the other end. Sponsored by: Juniper Networks, Inc.		2024-11-27 09:17:09 -05:00
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uart.h	uart: Add a signal to compute rclk from baudrate	2024-10-14 16:03:58 -06:00
uart_bus.h	dev/uart: name uart_class_set DATA_SET macro UART_CLASS()	2024-02-22 22:43:22 +00:00
uart_bus_acpi.c	sys: Automated cleanup of cdefs and other formatting	2023-11-26 22:24:00 -07:00
uart_bus_fdt.c	uart: Honour clock-frequency in FDT for UART_FDT_CLASS if present	2024-05-15 16:53:33 +01:00
uart_bus_isa.c	sys: Automated cleanup of cdefs and other formatting	2023-11-26 22:24:00 -07:00
uart_bus_pci.c	Add support for Intel Atom S1200 UART	2024-04-19 16:52:51 -06:00
uart_bus_puc.c	sys: Automated cleanup of cdefs and other formatting	2023-11-26 22:24:00 -07:00
uart_bus_scc.c	sys: Automated cleanup of cdefs and other formatting	2023-11-26 22:24:00 -07:00
uart_core.c	uart: Go back to returning '0' when we've probed the device.	2024-10-15 04:59:29 -06:00
uart_cpu.h	sys: Remove $FreeBSD$: two-line .h pattern	2023-08-16 11:54:11 -06:00
uart_cpu_acpi.c	uart: Implement SPCR rev 3 and 4 for PreciseBaudrate and UartClkFreq	2024-10-15 05:00:11 -06:00
uart_cpu_acpi.h	uart: Add uart_cpu_acpi_setup to setup the uart	2024-03-18 16:20:52 +00:00
uart_cpu_arm64.c	uart: Add uart_cpu_acpi_setup to setup the uart	2024-03-18 16:20:52 +00:00
uart_cpu_fdt.c	uart: Small style tweak	2024-10-11 15:27:46 -06:00
uart_cpu_fdt.h	sys: Remove $FreeBSD$: two-line .h pattern	2023-08-16 11:54:11 -06:00
uart_cpu_powerpc.c	sys: Automated cleanup of cdefs and other formatting	2023-11-26 22:24:00 -07:00
uart_cpu_x86.c	uart: Add uart_cpu_acpi_setup to setup the uart	2024-03-18 16:20:52 +00:00
uart_dbg.c	sys: Automated cleanup of cdefs and other formatting	2023-11-26 22:24:00 -07:00
uart_dev_imx.c	clk: Move clock code in dev/clk	2024-01-10 19:20:26 +01:00
uart_dev_imx.h	sys: Remove $FreeBSD$: two-line .h pattern	2023-08-16 11:54:11 -06:00
uart_dev_lowrisc.c	sys: Remove $FreeBSD$: one-line .c pattern	2023-08-16 11:54:36 -06:00
uart_dev_lowrisc.h	sys: Remove $FreeBSD$: two-line .h pattern	2023-08-16 11:54:11 -06:00
uart_dev_msm.c	sys: Remove $FreeBSD$: one-line .c pattern	2023-08-16 11:54:36 -06:00
uart_dev_msm.h	sys: Remove $FreeBSD$: two-line .h pattern	2023-08-16 11:54:11 -06:00
uart_dev_mu.c	sys: Automated cleanup of cdefs and other formatting	2023-11-26 22:24:00 -07:00
uart_dev_mvebu.c	sys: Simplify enabling EARLY_PRINTF uarts	2024-02-13 11:48:52 +00:00
uart_dev_ns8250.c	uart: Add primitive noise filtering on RX	2024-11-27 09:17:09 -05:00
uart_dev_ns8250.h	uart: Add primitive noise filtering on RX	2024-11-27 09:17:09 -05:00
uart_dev_pl011.c	uart/pl011: Add support for computing rclk	2024-10-15 04:58:49 -06:00
uart_dev_quicc.c	uart: Use device_set_descf()	2024-06-02 19:38:41 -04:00
uart_dev_snps.c	uart_snps: Register a device xref for UARTs	2024-04-12 17:04:23 +00:00
uart_dev_ti8250.c	uart(4): Honor hardware state of NS8250-class for tsw_busy	2024-01-14 08:03:59 +01:00
uart_dev_z8530.c	uart: Use device_set_descf()	2024-06-02 19:38:41 -04:00
uart_if.m	uart(4): Honor hardware state of NS8250-class for tsw_busy	2024-01-14 08:03:59 +01:00
uart_ppstypes.h	sys: Remove $FreeBSD$: two-line .h pattern	2023-08-16 11:54:11 -06:00
uart_subr.c	uart: uart_getenv: check for NULL class last, not first	2024-10-14 16:03:59 -06:00
uart_tty.c	uart(4): Honor hardware state of NS8250-class for tsw_busy	2024-01-14 08:03:59 +01:00