The lpc32xx has UARTs that are not 8250 compatible. Add support for low level debugging on those high speed UARTs.
Signed-off-by: Alexandre Belloni <[email protected]> --- arch/arm/Kconfig.debug | 18 +++++++++++++++--- arch/arm/include/debug/lpc32xx_hsuart.S | 22 ++++++++++++++++++++++ 2 files changed, 37 insertions(+), 3 deletions(-) create mode 100644 arch/arm/include/debug/lpc32xx_hsuart.S diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 6d6e0330930b..0d4d64f5d3b7 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -530,7 +530,16 @@ choice select DEBUG_UART_8250 help Say Y here if you want kernel low-level debugging support - on NXP LPC32xx based platforms. + on NXP LPC32xx based platforms using an INS16Cx50 compatible + UART. + + config DEBUG_LPC32XX_HSUART + bool "Kernel low-level debugging messages via NXP LPC32xx High Speed UART" + depends on ARCH_LPC32XX + help + Say Y here if you want kernel low-level debugging support + on NXP LPC32xx based platforms using an high speed (14-clock) + UART. config DEBUG_MESON_UARTAO bool "Kernel low-level debugging via Meson6 UARTAO" @@ -1541,6 +1550,7 @@ config DEBUG_LL_INCLUDE DEBUG_IMX6UL_UART || \ DEBUG_IMX7D_UART default "debug/ks8695.S" if DEBUG_KS8695_UART + default "debug/lpc32xx_hsuart.S" if DEBUG_LPC32XX_HSUART default "debug/msm.S" if DEBUG_QCOM_UARTDM default "debug/netx.S" if DEBUG_NETX_UART default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART @@ -1622,6 +1632,7 @@ config DEBUG_UART_PHYS default 0x3e000000 if DEBUG_BCM_KONA_UART default 0x3f201000 if DEBUG_BCM2836 default 0x4000e400 if DEBUG_LL_UART_EFM32 + default 0x40014000 if DEBUG_LPC32XX_HSUART default 0x40028000 if DEBUG_AT91_SAMV7_USART1 default 0x40081000 if DEBUG_LPC18XX_UART0 default 0x40090000 if DEBUG_LPC32XX @@ -1716,7 +1727,7 @@ config DEBUG_UART_PHYS DEBUG_S3C64XX_UART || \ DEBUG_BCM63XX_UART || DEBUG_ASM9260_UART || \ DEBUG_SIRFSOC_UART || DEBUG_DIGICOLOR_UA0 || \ - DEBUG_AT91_UART + DEBUG_AT91_UART || DEBUG_LPC32XX_HSUART config DEBUG_UART_VIRT hex "Virtual base address of debug UART" @@ -1741,6 +1752,7 @@ config DEBUG_UART_VIRT default 0xf1c28400 if DEBUG_SUNXI_UART1 default 0xf1f02800 if DEBUG_SUNXI_R_UART default 0xf31004c0 if DEBUG_MESON_UARTAO + default 0xf4014000 if DEBUG_LPC32XX_HSUART default 0xf4090000 if DEBUG_LPC32XX default 0xf4200000 if DEBUG_GEMINI default 0xf6200000 if DEBUG_PXA_UART1 @@ -1832,7 +1844,7 @@ config DEBUG_UART_VIRT DEBUG_S3C64XX_UART || \ DEBUG_BCM63XX_UART || DEBUG_ASM9260_UART || \ DEBUG_SIRFSOC_UART || DEBUG_DIGICOLOR_UA0 || \ - DEBUG_AT91_UART + DEBUG_AT91_UART || DEBUG_LPC32XX_HSUART config DEBUG_UART_8250_SHIFT int "Register offset shift for the 8250 debug UART" diff --git a/arch/arm/include/debug/lpc32xx_hsuart.S b/arch/arm/include/debug/lpc32xx_hsuart.S new file mode 100644 index 000000000000..e0205368c6ff --- /dev/null +++ b/arch/arm/include/debug/lpc32xx_hsuart.S @@ -0,0 +1,22 @@ +#define LPC_HSU_TX (0x0) +#define LPC_HSU_LEVEL (0x4) +#define LPC_HSU_LEVEL_TX 0xFF00 + + .macro addruart, rp, rv, tmp + ldr \rp, =CONFIG_DEBUG_UART_PHYS @ System peripherals (phys address) + ldr \rv, =CONFIG_DEBUG_UART_VIRT @ System peripherals (virt address) + .endm + + .macro senduart,rd,rx + str \rd, [\rx, #(LPC_HSU_TX)] + .endm + + .macro waituart,rd,rx + .endm + + .macro busyuart,rd,rx +1001: ldr \rd, [\rx, #(LPC_HSU_LEVEL)] + ands \rd, \rd, LPC_HSU_LEVEL_TX + bne 1001b + .endm + -- 2.20.1
