opensbi.git/lib/utils/serial, branch v1.5

lib: serial: fix RX path in litex-uart

2024-06-13T16:24:09Z

When used to read characters from the terminal (e.g., when the SBI console is used via ecall from linux with `console=hvc0`), we must acknowledge receipt of each character to "pop" it off the LiteUART hardware queue, and allow the next character to be made available. Fixes: 52af6e4b ("lib: utils: Add LiteX UART support") Suggested-by: Dolu1990 Signed-off-by: Gabriel Somlo Reviewed-by: Anup Patel

lib: utils/serial: Fix fdt_serial to match more dt nodes

2024-06-13T13:09:37Z

If there are multiple dt nodes, the previous code only tries to match the first one, which may lose initialization. Signed-off-by: Xiang W Reviewed-by: Anup Patel

lib: utils/serial: Skip initialize serial when dt is not enabled

2024-06-13T13:06:49Z

When the dt node has a status property and the value is not ok or okay, skip initializing serial. Signed-off-by: Xiang W Reviewed-by: Anup Patel

lib: utils/serial: remove semihosting_putc

2023-11-17T10:33:24Z

For some debuggers that do not implement SYSWRITEC and SYSREADC operations, we have to use SYSWRITE and SYSREAD. Instead of implementing semihosting_putc() using SYSWRITE, let us simply remove semihosting_putc() because console_putc/console_puts are now interchangeable. Signed-off-by: Chen Pei Signed-off-by: Xiang W Reviewed-by: Guo Ren Reviewed-by: Anup Patel

lib: utils/serial: Optimize semihosting_putc implementation

2023-11-16T06:06:44Z

For some debuggers that do not implement SYSWRITEC and SYSREADC operations, we can use SYSWRITE and SYSREAD instead like the implementation of semihosting_getc(). Signed-off-by: Chen Pei Reviewed-by: Xiang W Reviewed-by: Anup Patel

lib: utils/serial: Ensure proper allocation of PMP entries for uart8250

2023-10-06T11:23:25Z

The added memory region should start from the base address. Otherwise, the range will be shifted by reg_offset and not able to merge consecutive NAPOT regions in the root domain, resulting in wasted PMP entries. Fixes: e8bc1621 ("lib: utils/serial: Add shared regions for serial drivers") Signed-off-by: Yu Chien Peter Lin Reviewed-by: Anup Patel

lib: utils/serial: Add shared regions for serial drivers

2023-09-24T11:34:41Z

The serial driver regions used by OpenSBI should be marked as a shared read-write regions between M-mode and SU-mode as those are accessed by earlycon and the corresponding tty serial drivers running in 'S' mode. When the smepmp extension is enabled, PMP entries for these shared regions will get programmed. Signed-off-by: Mayuresh Chitale Signed-off-by: Anup Patel

lib: utils: Improve fdt_serial_init

2023-05-26T07:07:25Z

A final check of all DT nodes does not necessarily find a match, so SBI_ENODEV needs to be returned. Optimize removal of current_driver. Signed-off-by: Xiang W Reviewed-by: Anup Patel

lib: serial: Cadence: Enable compatibility for cdns,uart-r1p8

2023-03-09T15:42:35Z

The Cadence driver does not use the RX byte status feature and hence can be advertised to be compatible with cdns,uart-r1p8 as well. Signed-off-by: Mayuresh Chitale Reviewed-by: Anup Patel

lib: utils/serial: Implement console_puts() for semihosting

2023-02-10T04:34:59Z

We implement console_puts() for semihosting serial driver to speed-up semihosting based prints. Signed-off-by: Anup Patel Reviewed-by: Atish Patra Reviewed-by: Xiang W Reviewed-by: Bin Meng Reviewed-by: Andrew Jones