From: Antony Pavlov <antonynpavlov@gmail.com>
To: barebox@lists.infradead.org
Subject: [PATCH 2/4] MIPS: ath79: pbl: import hornet_1_1_war routine from U-Boot_mod
Date: Thu, 25 Feb 2016 12:14:51 +0300 [thread overview]
Message-ID: <1456391693-25172-3-git-send-email-antonynpavlov@gmail.com> (raw)
In-Reply-To: <1456391693-25172-1-git-send-email-antonynpavlov@gmail.com>
U-Boot_mod is a popular bootloader for Atheros AR93xx chips,
please see https://github.com/pepe2k/u-boot_mod for details.
It's reasonable to import some lowlevel AR9331 initialization
code from U-Boot_mod.
AR9331 (Hornet) 1.1 currently needs an additional
reset at 1st boot. This patch imports necessary code
from u-boot_mod/u-boot/cpu/mips/start_bootstrap.S.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
---
arch/mips/mach-ath79/include/mach/pbl_macros.h | 43 ++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/arch/mips/mach-ath79/include/mach/pbl_macros.h b/arch/mips/mach-ath79/include/mach/pbl_macros.h
index 810f49d..24cfd60 100644
--- a/arch/mips/mach-ath79/include/mach/pbl_macros.h
+++ b/arch/mips/mach-ath79/include/mach/pbl_macros.h
@@ -223,4 +223,47 @@
.set pop
.endm
+.macro hornet_1_1_war
+ .set push
+ .set noreorder
+
+/*
+ * WAR: Hornet 1.1 currently need a reset once we boot to let the resetb has
+ * enough time to stable, so that trigger reset at 1st boot, system team
+ * is investigaing the issue, will remove in short
+ */
+
+ li t7, 0xbd000000
+ lw t8, 0(t7)
+ li t9, 0x12345678
+
+ /* if value of 0xbd000000 != 0x12345678, go to do_reset */
+ bne t8, t9, do_reset
+ nop
+
+ li t9, 0xffffffff
+ sw t9, 0(t7)
+ b normal_path
+ nop
+
+do_reset:
+ /* put 0x12345678 into 0xbd000000 */
+ sw t9, 0(t7)
+
+ /* reset register 0x1806001c */
+ li t7, 0xb806001c
+ lw t8, 0(t7)
+ /* bit24, fullchip reset */
+ li t9, 0x1000000
+ or t8, t8, t9
+ sw t8, 0(t7)
+
+do_reset_loop:
+ b do_reset_loop
+ nop
+
+normal_path:
+ .set pop
+.endm
+
#endif /* __ASM_MACH_ATH79_PBL_MACROS_H */
--
2.7.0
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next prev parent reply other threads:[~2016-02-25 9:15 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-25 9:14 [PATCH 0/4] MIPS: ath79: pbl: use more lowlevel init code " Antony Pavlov
2016-02-25 9:14 ` [PATCH 1/4] MIPS: ath79: pbl: import AR9331 CP0 init routine " Antony Pavlov
2016-02-25 15:23 ` Yegor Yefremov
2016-02-25 9:14 ` Antony Pavlov [this message]
2016-02-25 15:23 ` [PATCH 2/4] MIPS: ath79: pbl: import hornet_1_1_war " Yegor Yefremov
2016-02-25 9:14 ` [PATCH 3/4] MIPS: tplink-mr3020: pbl: use more lowlevel init code " Antony Pavlov
2016-02-25 15:23 ` Yegor Yefremov
2016-02-25 9:14 ` [PATCH 4/4] MIPS: black-swift: " Antony Pavlov
2016-02-25 15:23 ` Yegor Yefremov
2016-02-26 6:51 ` [PATCH 0/4] MIPS: ath79: " Sascha Hauer
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