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authorMike Frysinger <vapier@gentoo.org>2008-12-06 18:06:58 -0500
committerMike Frysinger <vapier@gentoo.org>2009-03-23 15:14:54 -0400
commit3986e981f565c08f10c7e526af8cb518d741c349 (patch)
tree12b89f7b7d1adba7b149f5bb97bb7ca33960e2b1
parent7e1d212b6da492c6ea32c62af92e185284f41291 (diff)
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Blackfin: handle reboot anomaly 432
Workaround anomaly 432: The bfrom_SysControl() firmware function does not clear the SIC_IWR1 register before executing the PLL programming sequence. Therefore, any interrupt enabled in the SIC_IWR1 register prior to the call to bfrom_SysControl() can prematurely terminate the idle sequence required for the PLL to relock properly. SIC_IWR0 is properly handled. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
-rw-r--r--cpu/blackfin/initcode.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/cpu/blackfin/initcode.c b/cpu/blackfin/initcode.c
index 342b96a..1b58f99 100644
--- a/cpu/blackfin/initcode.c
+++ b/cpu/blackfin/initcode.c
@@ -273,8 +273,14 @@ void initcode(ADI_BOOT_DATA *bootstruct)
memory_settings.uwPllCtl = CONFIG_PLL_CTL_VAL;
memory_settings.uwPllDiv = CONFIG_PLL_DIV_VAL;
memory_settings.uwPllLockCnt = CONFIG_PLL_LOCKCNT_VAL;
+#if ANOMALY_05000432
+ bfin_write_SIC_IWR1(0);
+#endif
syscontrol(SYSCTRL_WRITE | SYSCTRL_VRCTL | SYSCTRL_PLLCTL | SYSCTRL_PLLDIV | SYSCTRL_LOCKCNT |
(CONFIG_VR_CTL_VAL & FREQ_MASK ? SYSCTRL_INTVOLTAGE : SYSCTRL_EXTVOLTAGE), &memory_settings, NULL);
+#if ANOMALY_05000432
+ bfin_write_SIC_IWR1(-1);
+#endif
} else {
serial_putc('L');