dwc2: Add dcache support

[karo-tx-uboot.git] / drivers / usb / host / dwc2.c

diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c
index 702ef63f87451466eea7b7601e3bf056270bfa64..09f91f190af3d07245b186d7765b3eac149d4b51 100644 (file)
--- a/drivers/usb/host/dwc2.c
+++ b/drivers/usb/host/dwc2.c
@@ -27,8 +27,8 @@
 
 struct dwc2_priv {
 #ifdef CONFIG_DM_USB
-       uint8_t aligned_buffer[DWC2_DATA_BUF_SIZE] __aligned(8);
-       uint8_t status_buffer[DWC2_STATUS_BUF_SIZE] __aligned(8);
+       uint8_t aligned_buffer[DWC2_DATA_BUF_SIZE] __aligned(ARCH_DMA_MINALIGN);
+       uint8_t status_buffer[DWC2_STATUS_BUF_SIZE] __aligned(ARCH_DMA_MINALIGN);
 #else
        uint8_t *aligned_buffer;
        uint8_t *status_buffer;
@@ -39,9 +39,11 @@ struct dwc2_priv {
 };
 
 #ifndef CONFIG_DM_USB
-/* We need doubleword-aligned buffers for DMA transfers */
-DEFINE_ALIGN_BUFFER(uint8_t, aligned_buffer_addr, DWC2_DATA_BUF_SIZE, 8);
-DEFINE_ALIGN_BUFFER(uint8_t, status_buffer_addr, DWC2_STATUS_BUF_SIZE, 8);
+/* We need cacheline-aligned buffers for DMA transfers and dcache support */
+DEFINE_ALIGN_BUFFER(uint8_t, aligned_buffer_addr, DWC2_DATA_BUF_SIZE,
+               ARCH_DMA_MINALIGN);
+DEFINE_ALIGN_BUFFER(uint8_t, status_buffer_addr, DWC2_STATUS_BUF_SIZE,
+               ARCH_DMA_MINALIGN);
 
 static struct dwc2_priv local;
 #endif
@@ -821,8 +823,11 @@ int chunk_msg(struct dwc2_priv *priv, struct usb_device *dev,
                       &hc_regs->hctsiz);
 
                if (!in) {
-                       memcpy(priv->aligned_buffer, (char *)buffer + done,
-                              len);
+                       memcpy(priv->aligned_buffer, (char *)buffer + done, len);
+
+                       flush_dcache_range((unsigned long)priv->aligned_buffer,
+                               (unsigned long)((void *)priv->aligned_buffer +
+                               roundup(len, ARCH_DMA_MINALIGN)));
                }
 
                writel(phys_to_bus((unsigned long)priv->aligned_buffer),
@@ -840,6 +845,11 @@ int chunk_msg(struct dwc2_priv *priv, struct usb_device *dev,
 
                if (in) {
                        xfer_len -= sub;
+
+                       invalidate_dcache_range((unsigned long)priv->aligned_buffer,
+                               (unsigned long)((void *)priv->aligned_buffer +
+                               roundup(xfer_len, ARCH_DMA_MINALIGN)));
+
                        memcpy(buffer + done, priv->aligned_buffer, xfer_len);
                        if (sub)
                                stop_transfer = 1;