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| author | Aleksandar Gerasimovski <aleksandar.gerasimovski@hitachienergy.com> | 2021-11-16 12:53:28 +0000 |
|---|---|---|
| committer | Priyanka Jain <priyanka.jain@nxp.com> | 2022-02-01 15:08:07 +0530 |
| commit | de144d5ffe0c15c56e3bbd64832bc4b265bd663f (patch) | |
| tree | 8794afa83661dcc408457fad6e2d6171d3b8dd03 | |
| parent | 70003e52f4ed9b22a75ac4d084ceee65d9b14ea1 (diff) | |
| download | u-boot-de144d5ffe0c15c56e3bbd64832bc4b265bd663f.zip u-boot-de144d5ffe0c15c56e3bbd64832bc4b265bd663f.tar.gz u-boot-de144d5ffe0c15c56e3bbd64832bc4b265bd663f.tar.bz2 | |
km: qrio: add access functions for ebootcount
The EBOOTCNT is a reserved persistent static memory area in QRIO,
and similar to BOOTCNT is intended to be used as boot counter location.
Comparable to BOOTCNT that is reserved for u-boot main bootcount
infrastructure, EBOOTCNT is intended to be used for pg-wcom board
specific purposes (e.g implementing early boot counter for fail-safe
u-boot update).
Signed-off-by: Aleksandar Gerasimovski <aleksandar.gerasimovski@hitachienergy.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
| -rw-r--r-- | board/keymile/common/common.h | 3 | ||||
| -rw-r--r-- | board/keymile/common/qrio.c | 38 |
2 files changed, 41 insertions, 0 deletions
diff --git a/board/keymile/common/common.h b/board/keymile/common/common.h index 15a3c37..fc14728 100644 --- a/board/keymile/common/common.h +++ b/board/keymile/common/common.h @@ -133,6 +133,9 @@ int get_testpin(void); int set_km_env(void); +ulong early_bootcount_load(void); +void early_bootcount_store(ulong ebootcount); + #define DELAY_ABORT_SEQ 62 /* @200kHz 9 clocks = 44us, 62us is ok */ #define DELAY_HALF_PERIOD (500 / (CONFIG_SYS_I2C_SPEED / 1000)) diff --git a/board/keymile/common/qrio.c b/board/keymile/common/qrio.c index 89a9726..5401bdd 100644 --- a/board/keymile/common/qrio.c +++ b/board/keymile/common/qrio.c @@ -270,6 +270,44 @@ void qrio_uprstreq(u8 mode) out_8(qrio_base + RSTCFG_OFF, rstcfg); } +/* Early bootcount memory area is avilable starting from QRIO3 Rev.2 */ +#define QRIO3_ID 0x71 +#define QRIO3_REV 0x02 +#define EBOOTCNT_OFF 0x28 + +ulong early_bootcount_load(void) +{ + void __iomem *qrio_base = (void *)CONFIG_SYS_QRIO_BASE; + u16 id_rev = in_be16(qrio_base + ID_REV_OFF); + u8 id = (id_rev >> 8) & 0xff; + u8 rev = id_rev & 0xff; + u32 ebootcount = 0; + + if (id == QRIO3_ID && rev >= QRIO3_REV) { + ebootcount = in_be32(qrio_base + EBOOTCNT_OFF); + } else { + printf("QRIO: warning: early bootcount not supported, "); + printf("id = %u, rev = %u\n", id, rev); + } + + return ebootcount; +} + +void early_bootcount_store(ulong ebootcount) +{ + void __iomem *qrio_base = (void *)CONFIG_SYS_QRIO_BASE; + u16 id_rev = in_be16(qrio_base + ID_REV_OFF); + u8 id = (id_rev >> 8) & 0xff; + u8 rev = id_rev & 0xff; + + if (id == QRIO3_ID && rev >= QRIO3_REV) { + out_be32(qrio_base + EBOOTCNT_OFF, ebootcount); + } else { + printf("QRIO: warning: early bootcount not supported, "); + printf("id = %u, rev = %u\n", id, rev); + } +} + /* I2C deblocking uses the algorithm defined in board/keymile/common/common.c * 2 dedicated QRIO GPIOs externally pull the SCL and SDA lines * For I2C only the low state is activly driven and high state is pulled-up |