1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 074728e10225..5a09b9a26e0d 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -89,6 +89,7 @@ struct xhci_cap_regs {
 #define HCS_ERST_MAX(p)         (((p) >> 4) & 0xf)
 /* bit 26 Scratchpad restore - for save/restore HW state - not used yet */
 /* bits 27:31 number of Scratchpad buffers SW must allocate for the HW */
+#define HCS_MAX_SCRATCHPAD(p)   (((p) >> 27) & 0x1f)
 
 /* HCSPARAMS3 - hcs_params3 - bitmasks */
 /* bits 0:7, Max U1 to U0 latency for the roothub ports */
@@ -951,6 +952,13 @@ struct xhci_erst {
         unsigned int            erst_size;
 };
 
+struct xhci_scratchpad {
+        u64 *sp_array;
+        dma_addr_t sp_dma;
+        void **sp_buffers;
+        dma_addr_t *sp_dma_buffers;
+};
+
 /*
  * Each segment table entry is 4*32bits long.  1K seems like an ok size:
  * (1K bytes * 8bytes/bit) / (4*32 bits) = 64 segment entries in the table,
@@ -1005,6 +1013,9 @@ struct xhci_hcd {
         struct xhci_ring        *cmd_ring;
         struct xhci_ring        *event_ring;
         struct xhci_erst        erst;
+        /* Scratchpad */
+        struct xhci_scratchpad  *scratchpad;
+
         /* slot enabling and address device helpers */
         struct completion       addr_dev;
         int slot_id;