[src/trunk]: src/sys/arch/arm/ti Support 1-bit mode and force all xfers to bo...

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/f3ba11bcf57e
branches:  trunk
changeset: 846690:f3ba11bcf57e
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Thu Nov 28 23:57:09 2019 +0000

description:
Support 1-bit mode and force all xfers to bounce to workaround a transfer error issue for now

diffstat:

 sys/arch/arm/ti/ti_sdhc.c |  39 +++++++++++++++++++++++++--------------
 1 files changed, 25 insertions(+), 14 deletions(-)

diffs (97 lines):

diff -r c2a4f4c14e4e -r f3ba11bcf57e sys/arch/arm/ti/ti_sdhc.c
--- a/sys/arch/arm/ti/ti_sdhc.c Thu Nov 28 23:49:13 2019 +0000
+++ b/sys/arch/arm/ti/ti_sdhc.c Thu Nov 28 23:57:09 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ti_sdhc.c,v 1.4 2019/11/27 23:03:24 jmcneill Exp $     */
+/*     $NetBSD: ti_sdhc.c,v 1.5 2019/11/28 23:57:09 jmcneill Exp $     */
 /*-
  * Copyright (c) 2011 The NetBSD Foundation, Inc.
  * All rights reserved.
@@ -29,7 +29,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ti_sdhc.c,v 1.4 2019/11/27 23:03:24 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ti_sdhc.c,v 1.5 2019/11/28 23:57:09 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -428,15 +428,21 @@
 ti_sdhc_bus_width(struct sdhc_softc *sc, int width)
 {
        struct ti_sdhc_softc *hmsc = (struct ti_sdhc_softc *)sc;
-       uint32_t con;
+       uint32_t con, hctl;
 
        con = bus_space_read_4(hmsc->sc_bst, hmsc->sc_bsh, MMCHS_CON);
+       hctl = SDHC_READ(hmsc, SDHC_HOST_CTL);
        if (width == 8) {
                con |= CON_DW8;
+       } else if (width == 4) {
+               con &= ~CON_DW8;
+               hctl |= SDHC_4BIT_MODE;
        } else {
                con &= ~CON_DW8;
+               hctl &= ~SDHC_4BIT_MODE;
        }
        bus_space_write_4(hmsc->sc_bst, hmsc->sc_bsh, MMCHS_CON, con);
+       SDHC_WRITE(hmsc, SDHC_HOST_CTL, hctl);
 
        return 0;
 }
@@ -487,6 +493,13 @@
                    error);
                return error;
        }
+       error = bus_dmamap_load(sc->sc.sc_dmat, sc->sc_edma_dmamap,
+           sc->sc_edma_bbuf, MAXPHYS, NULL, BUS_DMA_WAITOK);
+       if (error) {
+               device_printf(sc->sc.sc_dev, "couldn't load dmamap: %d\n",
+                   error);
+               return error;
+       }
 
        return error;
 }
@@ -496,24 +509,23 @@
 {
        struct ti_sdhc_softc *sc = device_private(sdhc_sc->sc_dev);
        const bus_dmamap_t map = cmd->c_dmamap;
-       int seg, error;
        bool bounce;
+       int error;
 
-       for (bounce = false, seg = 0; seg < cmd->c_dmamap->dm_nsegs; seg++) {
-               if ((cmd->c_dmamap->dm_segs[seg].ds_addr & 0x1f) != 0) {
+#if notyet
+       bounce = false;
+       for (int seg = 0; seg < cmd->c_dmamap->dm_nsegs; seg++) {
+               if ((cmd->c_dmamap->dm_segs[seg].ds_addr & 0x1f) != 0 ||
+                   (cmd->c_dmamap->dm_segs[seg].ds_len & 3) != 0) {
                        bounce = true;
                        break;
                }
        }
+#else
+       bounce = true;
+#endif
 
        if (bounce) {
-               error = bus_dmamap_load(sc->sc.sc_dmat, sc->sc_edma_dmamap,
-                   sc->sc_edma_bbuf, MAXPHYS, NULL, BUS_DMA_WAITOK);
-               if (error) {
-                       device_printf(sc->sc.sc_dev,
-                           "[bounce] bus_dmamap_load failed: %d\n", error);
-                       return error;
-               }
                if (ISSET(cmd->c_flags, SCF_CMD_READ)) {
                        bus_dmamap_sync(sc->sc.sc_dmat, sc->sc_edma_dmamap, 0,
                            MAXPHYS, BUS_DMASYNC_PREREAD);
@@ -536,7 +548,6 @@
                        bus_dmamap_sync(sc->sc.sc_dmat, sc->sc_edma_dmamap, 0,
                            MAXPHYS, BUS_DMASYNC_POSTWRITE);
                }
-               bus_dmamap_unload(sc->sc.sc_dmat, sc->sc_edma_dmamap);
                if (ISSET(cmd->c_flags, SCF_CMD_READ) && error == 0) {
                        memcpy(cmd->c_data, sc->sc_edma_bbuf, cmd->c_datalen);
                }