Merge branch 'devel'

[karo-tx-linux.git] / arch / powerpc / sysdev / bestcomm / bestcomm_priv.h

diff --git a/arch/powerpc/sysdev/bestcomm/bestcomm_priv.h b/arch/powerpc/sysdev/bestcomm/bestcomm_priv.h
index 866a2915ef2fca92f3849480331a81e958bb3d69..eb0d1c883c318434b92278d9623935a95b1c7e98 100644 (file)
--- a/arch/powerpc/sysdev/bestcomm/bestcomm_priv.h
+++ b/arch/powerpc/sysdev/bestcomm/bestcomm_priv.h
@@ -198,8 +198,8 @@ struct bcom_task_header {
 #define BCOM_IPR_SCTMR_1       2
 #define BCOM_IPR_FEC_RX                6
 #define BCOM_IPR_FEC_TX                5
-#define BCOM_IPR_ATA_RX                4
-#define BCOM_IPR_ATA_TX                3
+#define BCOM_IPR_ATA_RX                7
+#define BCOM_IPR_ATA_TX                7
 #define BCOM_IPR_SCPCI_RX      2
 #define BCOM_IPR_SCPCI_TX      2
 #define BCOM_IPR_PSC3_RX       2
@@ -241,6 +241,22 @@ extern void bcom_set_initiator(int task, int initiator);
 
 #define TASK_ENABLE             0x8000
 
+/**
+ * bcom_disable_prefetch - Hook to disable bus prefetching
+ *
+ * ATA DMA and the original MPC5200 need this due to silicon bugs.  At the
+ * moment disabling prefetch is a one-way street.  There is no mechanism
+ * in place to turn prefetch back on after it has been disabled.  There is
+ * no reason it couldn't be done, it would just be more complex to implement.
+ */
+static inline void bcom_disable_prefetch(void)
+{
+       u16 regval;
+
+       regval = in_be16(&bcom_eng->regs->PtdCntrl);
+       out_be16(&bcom_eng->regs->PtdCntrl, regval | 1);
+};
+
 static inline void
 bcom_enable_task(int task)
 {