libpayload: xhci: Make XHCI stack usable on ARM
This patch updates the libpayload XHCI stack to run on ARM CPUs (tested with the DWC3 controller on an Exynos5420). Firstly, it adds support for 64-byte Slot/Endpoint Context sizes. Since the existing context handling code represented the whole device context as a C struct (whose size has to be known at compile time), it was necessary to refactor the input and device context structures to consist of pointers to the actual contexts instead. Secondly, it moves all data structures that the xHC accesses through DMA to cache-coherent memory. With a similar rationale as in the ARM patches for EHCI, using explicit cache maintenance functions to correctly handle the actual transfer buffers in all cases is presumably impossible. Instead this patch also chooses to create a DMA bounce buffer in the XHCI stack where transfer buffers which are not already cache-coherent will be copied to/from. Change-Id: I14e82fffb43b4d52d687b65415f2e33920e088de Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/169453 Reviewed-by: Stefan Reinauer <reinauer@google.com> (cherry picked from commit 1fa9964063cce6cbd87ba68334806dde8aa2354c) Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com> Reviewed-on: http://review.coreboot.org/6643 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
committed by
Isaac Christensen
parent
d96541f3fc
commit
1f86434227
@@ -40,18 +40,18 @@ xhci_dump_slotctx(const slotctx_t *const sc)
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usb_debug(" FIELD2\t0x%08"PRIx32"\n", sc->f2);
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usb_debug(" FIELD3\t0x%08"PRIx32"\n", sc->f3);
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usb_debug(" FIELD4\t0x%08"PRIx32"\n", sc->f4);
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SC_DUMP(ROUTE, *sc);
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SC_DUMP(SPEED, *sc);
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SC_DUMP(MTT, *sc);
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SC_DUMP(HUB, *sc);
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SC_DUMP(CTXENT, *sc);
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SC_DUMP(RHPORT, *sc);
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SC_DUMP(NPORTS, *sc);
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SC_DUMP(TTID, *sc);
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SC_DUMP(TTPORT, *sc);
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SC_DUMP(TTT, *sc);
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SC_DUMP(UADDR, *sc);
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SC_DUMP(STATE, *sc);
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SC_DUMP(ROUTE, sc);
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SC_DUMP(SPEED, sc);
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SC_DUMP(MTT, sc);
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SC_DUMP(HUB, sc);
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SC_DUMP(CTXENT, sc);
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SC_DUMP(RHPORT, sc);
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SC_DUMP(NPORTS, sc);
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SC_DUMP(TTID, sc);
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SC_DUMP(TTPORT, sc);
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SC_DUMP(TTT, sc);
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SC_DUMP(UADDR, sc);
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SC_DUMP(STATE, sc);
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}
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void
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@@ -63,15 +63,15 @@ xhci_dump_epctx(const epctx_t *const ec)
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usb_debug(" TRDQ_L\t0x%08"PRIx32"\n", ec->tr_dq_low);
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usb_debug(" TRDQ_H\t0x%08"PRIx32"\n", ec->tr_dq_high);
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usb_debug(" FIELD5\t0x%08"PRIx32"\n", ec->f5);
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EC_DUMP(STATE, *ec);
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EC_DUMP(INTVAL, *ec);
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EC_DUMP(CERR, *ec);
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EC_DUMP(TYPE, *ec);
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EC_DUMP(MBS, *ec);
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EC_DUMP(MPS, *ec);
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EC_DUMP(DCS, *ec);
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EC_DUMP(AVRTRB, *ec);
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EC_DUMP(MXESIT, *ec);
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EC_DUMP(STATE, ec);
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EC_DUMP(INTVAL, ec);
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EC_DUMP(CERR, ec);
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EC_DUMP(TYPE, ec);
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EC_DUMP(MBS, ec);
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EC_DUMP(MPS, ec);
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EC_DUMP(DCS, ec);
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EC_DUMP(AVRTRB, ec);
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EC_DUMP(MXESIT, ec);
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}
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void
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@@ -79,19 +79,19 @@ xhci_dump_devctx(const devctx_t *const dc, const u32 ctx_mask)
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{
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int i;
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if (ctx_mask & 1)
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xhci_dump_slotctx(&dc->slot);
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xhci_dump_slotctx(dc->slot);
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for (i = 0; i < SC_GET(CTXENT, dc->slot); ++i) {
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if (ctx_mask & (2 << i))
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xhci_dump_epctx(&dc->all_eps[i]);
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xhci_dump_epctx(dc->ep[i]);
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}
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}
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void
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xhci_dump_inputctx(const inputctx_t *const ic)
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{
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xhci_debug("Input Control add: 0x%08"PRIx32"\n", ic->control.add);
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xhci_debug("Input Control drop: 0x%08"PRIx32"\n", ic->control.drop);
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xhci_dump_devctx(&ic->dev, ic->control.add);
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xhci_debug("Input Control add: 0x%08"PRIx32"\n", *ic->add);
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xhci_debug("Input Control drop: 0x%08"PRIx32"\n", *ic->drop);
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xhci_dump_devctx(&ic->dev, *ic->add);
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}
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void
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