diff options
| author | Ahmad Fatoum <a.fatoum@pengutronix.de> | 2022-06-09 07:59:20 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2022-06-17 08:28:55 +0200 |
| commit | 5f3249f5a1ac75afaf02506b155db63b6dea3bf9 (patch) | |
| tree | 00dbac62737a6b98aea424b0d52b447ecec2a6d1 /arch/arm/mach-bcm283x/include | |
| parent | 4f6ab07e2d485acc05316c3982670e5a5800caa2 (diff) | |
| download | barebox-5f3249f5a1ac75afaf02506b155db63b6dea3bf9.tar.gz barebox-5f3249f5a1ac75afaf02506b155db63b6dea3bf9.tar.xz | |
ARM: rpi: add debug_ll support for Raspberry Pi 4
The mini uart (Pins 8/10) is the primary UART on the Raspberry Pi 4 and
can be set up in firmware by specifying enable_uart=1 in the config.txt.
Add a DEBUG_LL implementation to use this for early debugging.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20220609055922.667016-20-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/mach-bcm283x/include')
| -rw-r--r-- | arch/arm/mach-bcm283x/include/mach/debug_ll.h | 20 | ||||
| -rw-r--r-- | arch/arm/mach-bcm283x/include/mach/platform.h | 1 |
2 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm/mach-bcm283x/include/mach/debug_ll.h b/arch/arm/mach-bcm283x/include/mach/debug_ll.h index db23112aa0..fdb63b4f5a 100644 --- a/arch/arm/mach-bcm283x/include/mach/debug_ll.h +++ b/arch/arm/mach-bcm283x/include/mach/debug_ll.h @@ -18,6 +18,7 @@ #define __MACH_BCM2835_DEBUG_LL_H__ #include <mach/platform.h> +#include <io.h> #ifdef CONFIG_DEBUG_RPI1_UART @@ -66,6 +67,25 @@ static inline void debug_ll_init(void) debug_ll_ns16550_init(divisor); } +#elif defined CONFIG_DEBUG_RPI4_MINI_UART + +static inline uint8_t debug_ll_read_reg(int reg) +{ + return readb(BCM2711_MINIUART_BASE + (reg << 2)); +} + +static inline void debug_ll_write_reg(int reg, uint8_t val) +{ + writeb(val, BCM2711_MINIUART_BASE + (reg << 2)); +} + +#include <debug_ll/ns16550.h> + +static inline void debug_ll_init(void) +{ + /* Configured by ROM */ +} + #else static inline void debug_ll_init(void) diff --git a/arch/arm/mach-bcm283x/include/mach/platform.h b/arch/arm/mach-bcm283x/include/mach/platform.h index 6917e1f345..b957ac8de3 100644 --- a/arch/arm/mach-bcm283x/include/mach/platform.h +++ b/arch/arm/mach-bcm283x/include/mach/platform.h @@ -34,6 +34,7 @@ #define BCM2836_PL011_BASE 0x3f201000UL #define BCM2835_MINIUART_BASE 0x20215040 #define BCM2836_MINIUART_BASE 0x3f215040UL +#define BCM2711_MINIUART_BASE 0xfe215040UL #endif |