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-rw-r--r--hw/sd/sd.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index 2e0ef3e5aa..346d86f69c 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -43,6 +43,8 @@ do { fprintf(stderr, "SD: " fmt , ## __VA_ARGS__); } while (0)
#define DPRINTF(fmt, ...) do {} while(0)
#endif
+#define ACMD41_ENQUIRY_MASK 0x00ffffff
+
typedef enum {
sd_r0 = 0, /* no response */
sd_r1, /* normal response command */
@@ -1277,9 +1279,14 @@ static sd_rsp_type_t sd_app_command(SDState *sd,
}
switch (sd->state) {
case sd_idle_state:
- /* We accept any voltage. 10000 V is nothing. */
- if (req.arg)
+ /* We accept any voltage. 10000 V is nothing.
+ *
+ * We don't model init delay so just advance straight to ready state
+ * unless it's an enquiry ACMD41 (bits 23:0 == 0).
+ */
+ if (req.arg & ACMD41_ENQUIRY_MASK) {
sd->state = sd_ready_state;
+ }
return sd_r3;