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8 Commits

Author SHA1 Message Date
Icenowy Zheng
b07e449d15 lib: utils/serial: Add support for Altera JTAG UART 
Altera provides a JTAG UART core that provides virtual UART over JTAG
and can coexist with their virtual JTAG. [1] This core has already been
supported by Linux and the programming interface has always been stable.

Add support for it to OpenSBI to ease JTAG prototype bringing up.

The driver follows the device tree binding in mainline Linux. [2]

[1] https://docs.altera.com/r/docs/683130/25.3/embedded-peripherals-ip-user-guide/jtag-uart-core
[2] https://github.com/torvalds/linux/blob/v6.19-rc1/Documentation/devicetree/bindings/serial/altr%2Cjuart-1.0.yaml

Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20260104065506.70182-1-zhengxingda@iscas.ac.cn
Signed-off-by: Anup Patel <anup@brainfault.org>
 2026-02-20 16:50:35 +05:30
Lad Prabhakar
0021b43737 lib: utils: serial: Add FDT driver for Renesas SCIF 
Add FDT driver for Renesas SCIF.

    dts example:

    soc: soc {
          ....
            scif0: serial@1004b800 {
                    compatible = "renesas,scif-r9a07g043",
                                 "renesas,scif-r9a07g044";
                    reg = <0 0x1004b800 0 0x400>;
                    interrupts = <412 IRQ_TYPE_LEVEL_HIGH>,
                                 <414 IRQ_TYPE_LEVEL_HIGH>,
                                 <415 IRQ_TYPE_LEVEL_HIGH>,
                                 <413 IRQ_TYPE_LEVEL_HIGH>,
                                 <416 IRQ_TYPE_LEVEL_HIGH>,
                                 <416 IRQ_TYPE_LEVEL_HIGH>;
                    interrupt-names = "eri", "rxi", "txi",
                                      "bri", "dri", "tei";
                    clocks = <&cpg CPG_MOD R9A07G043_SCIF0_CLK_PCK>;
                    clock-names = "fck";
                    power-domains = <&cpg>;
                    resets = <&cpg R9A07G043_SCIF0_RST_SYSTEM_N>;
                    status = "disabled";
            };
          ....
    };

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
 2022-12-12 18:50:35 +05:30
Lad Prabhakar
64e8b9f72e lib: utils: serial: Add Renesas SCIF driver 
Add Renesas SCIF driver.

Based on a patch in the BSP by Takeki Hamada
<takeki.hamada.ak@bp.renesas.com>
Link: https://github.com/renesas-rz/rz_opensbi/commits/work/OpenSBI-PMA

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
 2022-12-12 18:50:26 +05:30
Kautuk Consul
7f09fba86e lib: utils/serial: add semihosting support 
We add RISC-V semihosting based serial console for JTAG based early
debugging.

The RISC-V semihosting specification is available at:
https://github.com/riscv/riscv-semihosting-spec/blob/main/riscv-semihosting-spec.adoc

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Signed-off-by: Kautuk Consul <kconsul@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
 2022-09-13 18:24:42 +05:30
Jun Liang Tan
cbaa9b0333 lib: utils: serial: Add Cadence UART driver 
Add Cadence UART driver

Signed-off-by: Jun Liang Tan <junliang.tan@linux.starfivetech.com>
Signed-off-by: Wei Liang Lim <weiliang.lim@linux.starfivetech.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
 2022-08-23 08:40:17 +05:30
Anup Patel
68d7b85ec7 lib: utils/fdt: Use kconfig for enabling/disabling 
We update FDT support makefile to use kconfig for enabling/disabling.
To avoid compilation errors, we also enable FDT for each platform.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
 2022-08-08 09:34:08 +05:30
Anup Patel
3e76a607b5 lib: utils/sys: Use kconfig for enabling/disabling drivers 
We update system drivers makefile to use kconfig for enabling/disabling
drivers. To avoid compile errors, we also enable appropriate system
drivers for each platform.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
 2022-08-08 09:33:31 +05:30
Anup Patel
26bbff5f76 lib: utils/serial: Use kconfig for enabling/disabling drivers 
We update serial drivers makefile to use kconfig for enabling/disabling
drivers. To avoid compile errors, we also enable appropriate serial
drivers for each platform.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
 2022-08-08 09:33:21 +05:30