[PATCH 08/19] hw/sd/sdcard: Fix SET_BLOCK_COUNT command argument on eMMC (CMD23)

[Philippe Mathieu-Daudé]

From: Cédric Le Goater <clg@kaod.org>

The number of blocks is defined in the lower bits [15:0].

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/sd/sd.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index 2dc0209482..7c6f5ccc72 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -171,12 +171,18 @@ struct SDState {
 static void sd_realize(DeviceState *dev, Error **errp);
 
 static const SDProto sd_proto_spi;
+static const SDProto sd_proto_emmc;
 
 static bool sd_is_spi(SDState *sd)
 {
     return sd->proto == &sd_proto_spi;
 }
 
+static bool sd_is_emmc(SDState *sd)
+{
+    return sd->proto == &sd_proto_emmc;
+}
+
 static const char *sd_version_str(enum SDPhySpecificationVersion version)
 {
     static const char *sdphy_version[] = {
@@ -1479,6 +1485,9 @@ static sd_rsp_type_t sd_cmd_SET_BLOCK_COUNT(SDState *sd, 
SDRequest req)
     }
 
     sd->multi_blk_cnt = req.arg;
+    if (sd_is_emmc(sd)) {
+        sd->multi_blk_cnt &= 0xffff;
+    }
     trace_sdcard_set_block_count(sd->multi_blk_cnt);
 
     return sd_r1;
-- 
2.41.0