From 4d118bd7cc51f8f6e25bc6fb04a45e743eb414bb Mon Sep 17 00:00:00 2001 From: Patrick Wildt Date: Wed, 30 May 2018 13:32:41 +0000 Subject: Clear the DMA select bits in case we use PIO instead of DMA. Some SDHC controllers get confused if the ADMA bit is set even though we don't set the DMA enable flag. This can happen with the SDIO stack which uses PIO for 4 byte read/writes but DMA for larger transfers and thus switches from one mode to the other. ok kettenis@ --- sys/dev/sdmmc/sdhc.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'sys/dev/sdmmc') diff --git a/sys/dev/sdmmc/sdhc.c b/sys/dev/sdmmc/sdhc.c index b73368cb0c5..c2d149c8a90 100644 --- a/sys/dev/sdmmc/sdhc.c +++ b/sys/dev/sdmmc/sdhc.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sdhc.c,v 1.59 2018/05/25 00:04:12 patrick Exp $ */ +/* $OpenBSD: sdhc.c,v 1.60 2018/05/30 13:32:40 patrick Exp $ */ /* * Copyright (c) 2006 Uwe Stuehler @@ -918,7 +918,8 @@ sdhc_start_command(struct sdhc_host *hp, struct sdmmc_command *cmd) HWRITE4(hp, SDHC_ADMA_SYSTEM_ADDR, hp->adma_map->dm_segs[0].ds_addr); - } + } else + HCLR1(hp, SDHC_HOST_CTL, SDHC_DMA_SELECT); DPRINTF(1,("%s: cmd=%#x mode=%#x blksize=%d blkcount=%d\n", DEVNAME(hp->sc), command, mode, blksize, blkcount)); -- cgit v1.2.3