blackfin: bf60x: anomaly: Add a temporary anomaly 0501001

Add a temporary anomaly 0501001 for data loss in MMR reading if interrupted. Add work around for bfin serial driver as well. Signed-off-by: Sonic Zhang <[email protected]> Signed-off-by: Bob Liu <[email protected]>
goeke · May 21, 2012 · 913f2f2 · 913f2f2
1 parent 8bf7135
commit 913f2f2
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diff --git a/arch/blackfin/include/asm/bfin_serial.h b/arch/blackfin/include/asm/bfin_serial.h
@@ -282,7 +282,19 @@ struct bfin_uart_regs {
 #define UART_GET_GCTL(p)      UART_GET_CTL(p)
 #define UART_GET_LCR(p)       UART_GET_CTL(p)
 #define UART_GET_MCR(p)       UART_GET_CTL(p)
+#if ANOMALY_05001001
+#define UART_GET_STAT(p) \
+({ \
+	u32 __ret; \
+	unsigned long flags; \
+	flags = hard_local_irq_save(); \
+	__ret = bfin_read32(port_membase(p) + OFFSET_STAT); \
+	hard_local_irq_restore(flags); \
+	__ret; \
+})
+#else
 #define UART_GET_STAT(p)      bfin_read32(port_membase(p) + OFFSET_STAT)
+#endif
 #define UART_GET_MSR(p)       UART_GET_STAT(p)
 
 #define UART_PUT_CHAR(p, v)   bfin_write32(port_membase(p) + OFFSET_THR, v)

diff --git a/arch/blackfin/mach-bf609/include/mach/anomaly.h b/arch/blackfin/mach-bf609/include/mach/anomaly.h
@@ -57,6 +57,8 @@
 #define ANOMALY_05000481 (1)
 /* IFLUSH sucks at life */
 #define ANOMALY_05000491 (1)
+/* Tempopary anomaly ID for data loss in MMR read operation if interrupted */
+#define ANOMALY_05001001 (__SILICON_REVISION__ < 1)
 
 /* Anomalies that don't exist on this proc */
 #define ANOMALY_05000099 (0)