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| author | Michael Riesch <michael.riesch@wolfvision.net> | 2021-09-13 14:13:50 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2021-10-04 11:58:57 +0200 |
| commit | 2468a842885c8b75aed695bde59850bca0ecd4b6 (patch) | |
| tree | be74b06fb3ebdbd8dc43f7fb9902d6dccb9f7fa8 /arch | |
| parent | 4304301019726ddabc1dfbf277159bbaeaa02529 (diff) | |
| download | barebox-2468a842885c8b75aed695bde59850bca0ecd4b6.tar.gz barebox-2468a842885c8b75aed695bde59850bca0ecd4b6.tar.xz | |
arm: zynqmp: add boot source support
The ZynqMP reports the mode pins sampled at POR via the register
ZYNQMP_CRL_APB_BOOT_MODE_USER. This commit adds a function that reads
the register and populates the boot source.
Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net>
Link: https://lore.barebox.org/20210913121350.9307-4-michael.riesch@wolfvision.net
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-zynqmp/zynqmp.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/arch/arm/mach-zynqmp/zynqmp.c b/arch/arm/mach-zynqmp/zynqmp.c index 5871c145be..610d4bba6e 100644 --- a/arch/arm/mach-zynqmp/zynqmp.c +++ b/arch/arm/mach-zynqmp/zynqmp.c @@ -6,11 +6,36 @@ #include <common.h> #include <init.h> #include <linux/types.h> +#include <bootsource.h> #include <reset_source.h> #define ZYNQMP_CRL_APB_BASE 0xff5e0000 +#define ZYNQMP_CRL_APB_BOOT_MODE_USER (ZYNQMP_CRL_APB_BASE + 0x200) #define ZYNQMP_CRL_APB_RESET_REASON (ZYNQMP_CRL_APB_BASE + 0x220) +/* PSJTAG interface, PS dedicated pins. */ +#define ZYNQMP_CRL_APB_BOOT_MODE_PSJTAG 0x0 +/* SPI 24-bit addressing */ +#define ZYNQMP_CRL_APB_BOOT_MODE_QSPI24 0x1 +/* SPI 32-bit addressing */ +#define ZYNQMP_CRL_APB_BOOT_MODE_QSPI32 0x2 +/* SD 2.0 card @ controller 0 */ +#define ZYNQMP_CRL_APB_BOOT_MODE_SD0 0x3 +/* SPI NAND flash */ +#define ZYNQMP_CRL_APB_BOOT_MODE_NAND 0x4 +/* SD 2.0 card @ controller 1 */ +#define ZYNQMP_CRL_APB_BOOT_MODE_SD1 0x5 +/* eMMC @ controller 1 */ +#define ZYNQMP_CRL_APB_BOOT_MODE_EMMC 0x6 +/* USB 2.0 */ +#define ZYNQMP_CRL_APB_BOOT_MODE_USB 0x7 +/* PJTAG connection 0 option. */ +#define ZYNQMP_CRL_APB_BOOT_MODE_PJTAG0 0x8 +/* PJTAG connection 1 option. */ +#define ZYNQMP_CRL_APB_BOOT_MODE_PJTAG1 0x9 +/* SD 3.0 card (level-shifted) @ controller 1 */ +#define ZYNQMP_CRL_APB_BOOT_MODE_SD1LS 0xE + /* External POR: The PS_POR_B reset signal pin was asserted. */ #define ZYNQMP_CRL_APB_RESET_REASON_EXTERNAL BIT(0) /* Internal POR: A system error triggered a POR reset. */ @@ -26,6 +51,60 @@ /* Software debugger reset: Write to BLOCKONLY_RST [debug_only]. */ #define ZYNQMP_CRL_APB_RESET_REASON_DEBUG_SYS BIT(6) +static void zynqmp_get_bootsource(enum bootsource *src, int *instance) +{ + u32 v; + + if (!src || !instance) + return; + + v = readl(ZYNQMP_CRL_APB_BOOT_MODE_USER); + v &= 0x0F; + + /* cf. Table 11-1 "Boot Modes" in UG1085 Zynq UltraScale+ Device TRM */ + switch (v) { + case ZYNQMP_CRL_APB_BOOT_MODE_PSJTAG: + case ZYNQMP_CRL_APB_BOOT_MODE_PJTAG0: + case ZYNQMP_CRL_APB_BOOT_MODE_PJTAG1: + *src = BOOTSOURCE_JTAG; + *instance = 0; + break; + + case ZYNQMP_CRL_APB_BOOT_MODE_QSPI24: + case ZYNQMP_CRL_APB_BOOT_MODE_QSPI32: + *src = BOOTSOURCE_SPI; + *instance = 0; + break; + + case ZYNQMP_CRL_APB_BOOT_MODE_SD0: + *src = BOOTSOURCE_MMC; + *instance = 0; + break; + + case ZYNQMP_CRL_APB_BOOT_MODE_NAND: + *src = BOOTSOURCE_SPI_NAND; + *instance = 0; + break; + + case ZYNQMP_CRL_APB_BOOT_MODE_SD1: + case ZYNQMP_CRL_APB_BOOT_MODE_EMMC: + case ZYNQMP_CRL_APB_BOOT_MODE_SD1LS: + *src = BOOTSOURCE_MMC; + *instance = 1; + break; + + case ZYNQMP_CRL_APB_BOOT_MODE_USB: + *src = BOOTSOURCE_USB; + *instance = 0; + break; + + default: + *src = BOOTSOURCE_UNKNOWN; + *instance = BOOTSOURCE_INSTANCE_UNKNOWN; + break; + } +} + struct zynqmp_reset_reason { u32 mask; enum reset_src_type type; @@ -65,6 +144,13 @@ static enum reset_src_type zynqmp_get_reset_src(void) static int zynqmp_init(void) { + enum bootsource boot_src; + int boot_instance; + + zynqmp_get_bootsource(&boot_src, &boot_instance); + bootsource_set(boot_src); + bootsource_set_instance(boot_instance); + reset_source_set(zynqmp_get_reset_src()); return 0; |