[PATCH v5 14/18] hw/usb/hcd-ehci: Implement 64-bit siTD descriptor addressing

[Jamin Lin <jamin_lin@aspeedtech.com>]

EHCI supports 64-bit control data structure addressing when the
64-bit Addressing Capability bit in HCCPARAMS is set. In that mode,
the CTRLDSSEGMENT register provides the upper 32 bits that are
concatenated with 32-bit link pointer values to form full 64-bit
descriptor addresses (EHCI 1.0, section 2.3.5 and Appendix B).

siTD link pointers are stored as 32-bit values and must be expanded
to full 64-bit descriptor addresses when 64-bit mode is enabled.
Update the siTD traversal path to use ehci_get_desc_addr() when
following link pointers.

When 64-bit capability is disabled, descriptor addresses remain
32-bit and existing behaviour is unchanged.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/usb/hcd-ehci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c
index 43a01a796f..dfeb8ef70f 100644
--- a/hw/usb/hcd-ehci.c
+++ b/hw/usb/hcd-ehci.c
@@ -1792,7 +1792,7 @@ static int ehci_state_fetchsitd(EHCIState *ehci, int async)
         warn_report("Skipping active siTD");
     }
 
-    ehci_set_fetch_addr(ehci, async, sitd.next);
+    ehci_set_fetch_addr(ehci, async, ehci_get_desc_addr(ehci, sitd.next));
     ehci_set_state(ehci, async, EST_FETCHENTRY);
     return 1;
 }
-- 
2.43.0