From: Jamin Lin <jamin_...@aspeedtech.com> The Write Protect pin of SDHCI model is default active low to match the SDHCI spec. So, write enable the bit 19 should be 1 and write protected the bit 19 should be 0 at the Present State Register (0x24). However, some boards are design Write Protected pin active high. In other words, write enable the bit 19 should be 0 and write protected the bit 19 should be 1 at the Present State Register (0x24). To support it, introduces a new "wp-inverted" property and set it false by default.
Signed-off-by: Jamin Lin <jamin_...@aspeedtech.com> Acked-by: Cédric Le Goater <c...@redhat.com> Acked-by: Philippe Mathieu-Daudé <phi...@linaro.org> Link: https://lore.kernel.org/r/20241114094839.4128404-3-jamin_...@aspeedtech.com Signed-off-by: Cédric Le Goater <c...@redhat.com> --- include/hw/sd/sdhci.h | 5 +++++ hw/sd/sdhci.c | 6 ++++++ 2 files changed, 11 insertions(+) diff --git a/include/hw/sd/sdhci.h b/include/hw/sd/sdhci.h index 6cd2822f1d13..38c08e285980 100644 --- a/include/hw/sd/sdhci.h +++ b/include/hw/sd/sdhci.h @@ -100,6 +100,11 @@ struct SDHCIState { uint8_t sd_spec_version; uint8_t uhs_mode; uint8_t vendor; /* For vendor specific functionality */ + /* + * Write Protect pin default active low for detecting SD card + * to be protected. Set wp_inverted to invert the signal. + */ + bool wp_inverted; }; typedef struct SDHCIState SDHCIState; diff --git a/hw/sd/sdhci.c b/hw/sd/sdhci.c index 318587ff57ca..99dd4a4e9528 100644 --- a/hw/sd/sdhci.c +++ b/hw/sd/sdhci.c @@ -274,6 +274,10 @@ static void sdhci_set_readonly(DeviceState *dev, bool level) { SDHCIState *s = (SDHCIState *)dev; + if (s->wp_inverted) { + level = !level; + } + if (level) { s->prnsts &= ~SDHC_WRITE_PROTECT; } else { @@ -1555,6 +1559,8 @@ static const Property sdhci_sysbus_properties[] = { false), DEFINE_PROP_LINK("dma", SDHCIState, dma_mr, TYPE_MEMORY_REGION, MemoryRegion *), + DEFINE_PROP_BOOL("wp-inverted", SDHCIState, + wp_inverted, false), }; static void sdhci_sysbus_init(Object *obj) -- 2.48.1
