diff options
Diffstat (limited to 'arch/arm/mach-rockchip/px30/px30.c')
| -rw-r--r-- | arch/arm/mach-rockchip/px30/px30.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/arch/arm/mach-rockchip/px30/px30.c b/arch/arm/mach-rockchip/px30/px30.c index 8ce9ac561f0..5a5c119328f 100644 --- a/arch/arm/mach-rockchip/px30/px30.c +++ b/arch/arm/mach-rockchip/px30/px30.c @@ -2,10 +2,14 @@ /* * Copyright (c) 2017 Rockchip Electronics Co., Ltd */ + +#define LOG_CATEGORY LOGC_ARCH + #include <clk.h> #include <dm.h> #include <fdt_support.h> #include <init.h> +#include <misc.h> #include <spl.h> #include <asm/armv8/mmu.h> #include <asm/arch-rockchip/bootrom.h> @@ -15,6 +19,7 @@ #include <asm/arch-rockchip/clock.h> #include <asm/arch-rockchip/cru_px30.h> #include <dt-bindings/clock/px30-cru.h> +#include <linux/bitfield.h> const char * const boot_devices[BROM_LAST_BOOTSOURCE + 1] = { [BROM_BOOTSOURCE_EMMC] = "/mmc@ff390000", @@ -442,3 +447,59 @@ void board_debug_uart_init(void) #endif /* CONFIG_DEBUG_UART_BASE && CONFIG_DEBUG_UART_BASE == ... */ } #endif /* CONFIG_DEBUG_UART_BOARD_INIT */ + +#define PX30_OTP_SPECIFICATION_OFFSET 0x06 + +#define DDR_GRF_BASE_ADDR 0xff630000 +#define DDR_GRF_CON(n) (0 + (n) * 4) + +int checkboard(void) +{ + struct udevice *dev; + u8 specification; + u32 base_soc; + int ret; + + if (!IS_ENABLED(CONFIG_ROCKCHIP_OTP) || !CONFIG_IS_ENABLED(MISC)) + return 0; + + ret = uclass_get_device_by_driver(UCLASS_MISC, + DM_DRIVER_GET(rockchip_otp), &dev); + if (ret) { + log_debug("Could not find otp device, ret=%d\n", ret); + return 0; + } + + /* base SoC: 0x26334b52 for RK3326; 0x30335850 for PX30 */ + ret = misc_read(dev, 0, &base_soc, 4); + if (ret < 0) { + log_debug("Could not read specification, ret=%d\n", ret); + return 0; + } + + if (base_soc != 0x26334b52 && base_soc != 0x30335850) { + log_debug("Could not identify SoC, got 0x%04x in OTP\n", base_soc); + return 0; + } + + /* SoC variant: 0x21 for PX30/PX30S/RK3326/RK3326S; 0x2b for PX30K */ + ret = misc_read(dev, PX30_OTP_SPECIFICATION_OFFSET, &specification, 1); + if (ret < 0) { + log_debug("Could not read specification, ret=%d\n", ret); + return 0; + } + + if (specification == 0x2b) { + printf("SoC: PX30K\n"); + return 0; + } + + /* From vendor kernel: drivers/soc/rockchip/rockchip-cpuinfo.c */ + specification = FIELD_GET(GENMASK(15, 14), + readl(DDR_GRF_BASE_ADDR + DDR_GRF_CON(1))); + log_debug("DDR specification is %d\n", specification); + printf("SoC: %s%s\n", base_soc == 0x26334b52 ? "RK3326" : "PX30", + specification == 0x3 ? "S" : ""); + + return 0; +} |