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[Qemu-devel] [PATCH v3 12/14] hw/sd.c, hw/sd.h: add receive ready query

From: Evgeny Voevodin
Subject: [Qemu-devel] [PATCH v3 12/14] hw/sd.c, hw/sd.h: add receive ready query routine to SD/MMC API
Date: Mon, 12 Dec 2011 10:43:24 +0400

From: Mitsyanko Igor <address@hidden>

Data transfer direction between host controller and SD/MMC card is selected by
host controller configuration registers, but whether we actually need or need
not perform data transfer depends on type of last issued command. To avoid
memorization of which type of command host controller issued the last time, we
can use simple query procedures, to make sure that SD/MMC card is in the
right state. The only query routine currently presented in SD/MMC card
emulation is sd_data_ready(), this patch adds sd_receive_ready() routine.

Signed-off-by: Evgeny Voevodin <address@hidden>
 hw/sd.c |    5 +++++
 hw/sd.h |    1 +
 2 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/hw/sd.c b/hw/sd.c
index 10e26ad..b0a8557 100644
--- a/hw/sd.c
+++ b/hw/sd.c
@@ -1670,3 +1670,8 @@ void sd_enable(SDState *sd, int enable)
     sd->enable = enable;
+int sd_receive_ready(SDState *sd)
+    return sd->state == sd_receivingdata_state;
diff --git a/hw/sd.h b/hw/sd.h
index ac4b7c4..71ab781 100644
--- a/hw/sd.h
+++ b/hw/sd.h
@@ -75,5 +75,6 @@ uint8_t sd_read_data(SDState *sd);
 void sd_set_cb(SDState *sd, qemu_irq readonly, qemu_irq insert);
 int sd_data_ready(SDState *sd);
 void sd_enable(SDState *sd, int enable);
+int sd_receive_ready(SDState *sd);
 #endif /* __hw_sd_h */

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