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[Qemu-devel] [PATCH v4 1/4] sd: sdhci: mask transfer mode register value
From: |
P J P |
Subject: |
[Qemu-devel] [PATCH v4 1/4] sd: sdhci: mask transfer mode register value |
Date: |
Wed, 15 Feb 2017 00:22:22 +0530 |
From: Prasad J Pandit <address@hidden>
In SDHCI protocol, the transfer mode register is defined
to be of 6 bits. Mask its value with '0x0037' so that an
invalid value could not be assigned.
Signed-off-by: Prasad J Pandit <address@hidden>
---
hw/sd/sdhci.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
Update per: use macro for the mask value
-> https://lists.gnu.org/archive/html/qemu-devel/2017-02/msg02774.html
diff --git a/hw/sd/sdhci.c b/hw/sd/sdhci.c
index 5bd5ab6..cf647fa 100644
--- a/hw/sd/sdhci.c
+++ b/hw/sd/sdhci.c
@@ -119,6 +119,7 @@
(SDHC_CAPAB_BASECLKFREQ << 8) | (SDHC_CAPAB_TOUNIT << 7) | \
(SDHC_CAPAB_TOCLKFREQ))
+#define MASK_TRNMOD 0x0037
#define MASKED_WRITE(reg, mask, val) (reg = (reg & (mask)) | (val))
static uint8_t sdhci_slotint(SDHCIState *s)
@@ -1050,7 +1051,7 @@ sdhci_write(void *opaque, hwaddr offset, uint64_t val,
unsigned size)
if (!(s->capareg & SDHC_CAN_DO_DMA)) {
value &= ~SDHC_TRNS_DMA;
}
- MASKED_WRITE(s->trnmod, mask, value);
+ MASKED_WRITE(s->trnmod, mask, value & MASK_TRNMOD);
MASKED_WRITE(s->cmdreg, mask >> 16, value >> 16);
/* Writing to the upper byte of CMDREG triggers SD command generation
*/
--
2.9.3
[Qemu-devel] [PATCH v4 3/4] sd: sdhci: conditionally invoke multi block transfer, P J P, 2017/02/14
[Qemu-devel] [PATCH v4 4/4] sd: sdhci: Remove block count enable check in single block transfers, P J P, 2017/02/14
Re: [Qemu-devel] [PATCH v4 0/4] sd: sdhci: correct transfer mode register usage, Peter Maydell, 2017/02/17