[U-Boot] [RFC 17/22] ahci: support 64bit systems

[Tim Harvey]

Signed-off-by: Tim Harvey <tharvey at gateworks.com>
---
 drivers/ata/ahci.c | 26 +++++++++++++++++---------
 include/ahci.h     |  3 +++
 2 files changed, 20 insertions(+), 9 deletions(-)

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index d6753f140d..81d16925dd 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -26,6 +26,9 @@
 #include <dm/device-internal.h>
 #include <dm/lists.h>
 
+#define LOWER32(val)	(u32)((u64)(val) & 0xffffffff)
+#define UPPER32(val)	(u32)(((u64)(val) & 0xffffffff00000000) >> 32)
+
 static int ata_io_flush(struct ahci_uc_priv *uc_priv, u8 port);
 
 #ifndef CONFIG_DM_SCSI
@@ -517,8 +520,9 @@ static int ahci_fill_sg(struct ahci_uc_priv *uc_priv, u8 port,
 
 	for (i = 0; i < sg_count; i++) {
 		ahci_sg->addr =
-		    cpu_to_le32((unsigned long) buf + i * MAX_DATA_BYTE_COUNT);
-		ahci_sg->addr_hi = 0;
+			cpu_to_le32(LOWER32(buf + i * MAX_DATA_BYTE_COUNT));
+		ahci_sg->addr_hi =
+			cpu_to_le32(UPPER32(buf + i * MAX_DATA_BYTE_COUNT));
 		ahci_sg->flags_size = cpu_to_le32(0x3fffff &
 					  (buf_len < MAX_DATA_BYTE_COUNT
 					   ? (buf_len - 1)
@@ -535,11 +539,8 @@ static void ahci_fill_cmd_slot(struct ahci_ioports *pp, u32 opts)
 {
 	pp->cmd_slot->opts = cpu_to_le32(opts);
 	pp->cmd_slot->status = 0;
-	pp->cmd_slot->tbl_addr = cpu_to_le32((u32)pp->cmd_tbl & 0xffffffff);
-#ifdef CONFIG_PHYS_64BIT
-	pp->cmd_slot->tbl_addr_hi =
-	    cpu_to_le32((u32)(((pp->cmd_tbl) >> 16) >> 16));
-#endif
+	pp->cmd_slot->tbl_addr = cpu_to_le32(LOWER32(pp->cmd_tbl));
+	pp->cmd_slot->tbl_addr_hi = cpu_to_le32(UPPER32(pp->cmd_tbl));
 }
 
 static int wait_spinup(void __iomem *port_mmio)
@@ -609,10 +610,17 @@ static int ahci_port_start(struct ahci_uc_priv *uc_priv, u8 port)
 	pp->cmd_tbl_sg =
 			(struct ahci_sg *)(uintptr_t)virt_to_phys((void *)mem);
 
-	writel_with_flush((unsigned long)pp->cmd_slot,
+	if (uc_priv->cap & HOST_CAP_64)
+		writel_with_flush(cpu_to_le32(UPPER32(pp->cmd_slot)),
+				  port_mmio + PORT_LST_ADDR_HI);
+	writel_with_flush(cpu_to_le32(LOWER32(pp->cmd_slot)),
 			  port_mmio + PORT_LST_ADDR);
 
-	writel_with_flush(pp->rx_fis, port_mmio + PORT_FIS_ADDR);
+	if (uc_priv->cap & HOST_CAP_64)
+		writel_with_flush(cpu_to_le32(UPPER32(pp->rx_fis)),
+				  port_mmio + PORT_FIS_ADDR_HI);
+	writel_with_flush(cpu_to_le32(LOWER32(pp->rx_fis)),
+			  port_mmio + PORT_FIS_ADDR);
 
 #ifdef CONFIG_SUNXI_AHCI
 	sunxi_dma_init(port_mmio);
diff --git a/include/ahci.h b/include/ahci.h
index b42df6c77e..6e439c184c 100644
--- a/include/ahci.h
+++ b/include/ahci.h
@@ -40,6 +40,9 @@
 #define HOST_IRQ_EN		(1 << 1)  /* global IRQ enable */
 #define HOST_AHCI_EN		(1 << 31) /* AHCI enabled */
 
+/* HOST_CAP bits */
+#define HOST_CAP_64		(1 << 31) /* 64-bit addressing supported */
+
 /* Registers for each SATA port */
 #define PORT_LST_ADDR		0x00 /* command list DMA addr */
 #define PORT_LST_ADDR_HI	0x04 /* command list DMA addr hi */
-- 
2.17.1