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qemu/hw/char
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Tong Ho f576e0733c hw/char/pl011: Add support for loopback 
This patch adds loopback for sent characters, sent BREAK,
and modem-control signals.

Loopback of send and modem-control is often used for uart
self tests in real hardware but missing from current pl011
model, resulting in self-test failures when running in QEMU.

This implementation matches what is observed in real pl011
hardware placed in loopback mode:
1. Input characters and BREAK events from serial backend
   are ignored, but
2. Both TX characters and BREAK events are still sent to
   serial backend, in addition to be looped back to RX.

Signed-off-by: Tong Ho <tong.ho@amd.com>
Signed-off-by: Francisco Iglesias <francisco.iglesias@amd.com>
Message-id: 20240227054855.44204-1-tong.ho@amd.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2024-03-05 13:22:55 +00:00
..
avr_usart.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
bcm2835_aux.c hw/char: Constify VMState 2023-12-29 11:17:30 +11:00
cadence_uart.c hw/char: Constify VMState 2023-12-29 11:17:30 +11:00
cmsdk-apb-uart.c hw/char: Constify VMState 2023-12-29 11:17:30 +11:00
debugcon.c qdev: Move softmmu properties to qdev-properties-system.h 2020-12-18 15:20:17 -05:00
digic-uart.c hw/char: Constify VMState 2023-12-29 11:17:30 +11:00
escc.c hw/char: Constify VMState 2023-12-29 11:17:30 +11:00
etraxfs_ser.c bulk: Rename TARGET_FMT_plx -> HWADDR_FMT_plx 2023-01-18 11:14:34 +01:00
exynos4210_uart.c hw/char: Constify VMState 2023-12-29 11:17:30 +11:00
goldfish_tty.c hw/char: Constify VMState 2023-12-29 11:17:30 +11:00
grlib_apbuart.c hw/sparc/grlib: split out the headers for each peripherals 2024-02-15 16:58:46 +01:00
ibex_uart.c hw/char: Constify VMState 2023-12-29 11:17:30 +11:00
imx_serial.c hw/char/imx_serial: Implement receive FIFO and ageing timer 2024-01-26 11:34:21 +00:00
ipoctal232.c hw/char: Constify VMState 2023-12-29 11:17:30 +11:00
Kconfig hw/char: Add config for shakti uart 2021-09-01 11:59:12 +10:00
mcf_uart.c hw/char/mcf_uart: Have mcf_uart_create() return DeviceState 2023-11-01 07:31:05 +01:00
mchp_pfsoc_mmuart.c hw/char: Constify VMState 2023-12-29 11:17:30 +11:00
meson.build meson: Replace softmmu_ss -> system_ss 2023-06-20 10:01:30 +02:00
nrf51_uart.c hw/char: Constify VMState 2023-12-29 11:17:30 +11:00
omap_uart.c hw/arm/omap: Remove unused omap_uart_attach() 2023-06-05 07:43:23 +01:00
parallel-isa.c hw/char/parallel-isa: Implement relocation and enabling/disabling for TYPE_ISA_PARALLEL 2024-02-14 06:09:32 -05:00
parallel.c hw/char/parallel: Move portio_list from ParallelState to ISAParallelState 2024-02-14 06:09:32 -05:00
pl011.c hw/char/pl011: Add support for loopback 2024-03-05 13:22:55 +00:00
renesas_sci.c hw/char: Constify VMState 2023-12-29 11:17:30 +11:00
riscv_htif.c hw/char: riscv_htif: replace exit calls with proper shutdown 2023-10-12 12:35:36 +10:00
sclpconsole-lm.c hw/char: Constify VMState 2023-12-29 11:17:30 +11:00
sclpconsole.c hw/char: Constify VMState 2023-12-29 11:17:30 +11:00
serial-isa.c hw/char/serial-isa: Implement relocation and enabling/disabling for TYPE_ISA_SERIAL 2024-02-14 06:09:32 -05:00
serial-pci-multi.c hw/char: Constify VMState 2023-12-29 11:17:30 +11:00
serial-pci.c hw/char: Constify VMState 2023-12-29 11:17:30 +11:00
serial.c hw/char: Constify VMState 2023-12-29 11:17:30 +11:00
sh_serial.c hw/char/sh_serial: Add device id to trace output 2021-10-30 18:39:37 +02:00
shakti_uart.c hw/char: shakti_uart: Register device in 'input' category 2021-10-07 08:41:33 +10:00
sifive_uart.c hw/char: Constify VMState 2023-12-29 11:17:30 +11:00
spapr_vty.c hw/char: Constify VMState 2023-12-29 11:17:30 +11:00
stm32f2xx_usart.c hw/char/stm32f2xx_usart: Update IRQ when DR is written 2023-11-02 13:36:45 +00:00
terminal3270.c s390x: css: report errors from ccw_dstream_read/write 2021-04-09 10:52:13 +02:00
trace-events hw/xen: update Xen console to XenDevice model 2023-11-07 08:54:20 +00:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
virtio-console.c hw/char: Have FEWatchFunc handlers return G_SOURCE_CONTINUE/REMOVE 2023-08-31 19:47:43 +02:00
virtio-serial-bus.c hw/char: Constify VMState 2023-12-29 11:17:30 +11:00
xen_console.c hw/xen: add support for Xen primary console in emulated mode 2023-11-07 08:54:20 +00:00
xilinx_uartlite.c hw/char/xilinx_uartlite: Expose XILINX_UARTLITE QOM type 2023-02-27 13:27:05 +00:00