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Diffstat (limited to 'arch/powerpc/sysdev/bestcomm/bestcomm_priv.h')
-rw-r--r--arch/powerpc/sysdev/bestcomm/bestcomm_priv.h20
1 files changed, 18 insertions, 2 deletions
diff --git a/arch/powerpc/sysdev/bestcomm/bestcomm_priv.h b/arch/powerpc/sysdev/bestcomm/bestcomm_priv.h
index 866a291..eb0d1c8 100644
--- 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)
{
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