summaryrefslogtreecommitdiffstats
path: root/arch/blackfin
diff options
context:
space:
mode:
authorSonic Zhang <sonic.zhang@analog.com>2012-05-15 16:20:33 +0800
committerBob Liu <lliubbo@gmail.com>2012-05-21 14:55:03 +0800
commitc41704f509d1649f7ba0815c8d47c9563ff9b107 (patch)
tree38bfd638944b53e31567e2cf9dc9d8979d8fb3a2 /arch/blackfin
parent1e92bf6d80b5a0a137455c96bf6cdd9c1a5b531e (diff)
downloadlinux-c41704f509d1649f7ba0815c8d47c9563ff9b107.tar.bz2
blackfin: bf60x: twi: work around temporary anomaly 0501001
Disable IRQ when reading MMR rcv_data8 and rcv_data16. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bob Liu <lliubbo@gmail.com>
Diffstat (limited to 'arch/blackfin')
-rw-r--r--arch/blackfin/include/asm/bfin_twi.h27
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/bfin_twi.h b/arch/blackfin/include/asm/bfin_twi.h
index 72092108df1c..87e6007b8f4a 100644
--- a/arch/blackfin/include/asm/bfin_twi.h
+++ b/arch/blackfin/include/asm/bfin_twi.h
@@ -83,8 +83,35 @@ DEFINE_TWI_REG(FIFO_CTL, fifo_ctl)
DEFINE_TWI_REG(FIFO_STAT, fifo_stat)
DEFINE_TWI_REG(XMT_DATA8, xmt_data8)
DEFINE_TWI_REG(XMT_DATA16, xmt_data16)
+#if !ANOMALY_05001001
DEFINE_TWI_REG(RCV_DATA8, rcv_data8)
DEFINE_TWI_REG(RCV_DATA16, rcv_data16)
+#else
+static inline u16 read_RCV_DATA8(struct bfin_twi_iface *iface)
+{
+ u16 ret;
+ unsigned long flags;
+
+ flags = hard_local_irq_save();
+ ret = iface->regs_base->rcv_data8;
+ hard_local_irq_restore(flags);
+
+ return ret;
+}
+
+static inline u16 read_RCV_DATA16(struct bfin_twi_iface *iface)
+{
+ u16 ret;
+ unsigned long flags;
+
+ flags = hard_local_irq_save();
+ ret = iface->regs_base->rcv_data16;
+ hard_local_irq_restore(flags);
+
+ return ret;
+}
+#endif
+
/* ******************** TWO-WIRE INTERFACE (TWI) MASKS ***********************/
/* TWI_CLKDIV Macros (Use: *pTWI_CLKDIV = CLKLOW(x)|CLKHI(y); ) */