[Qemu-devel] [PATCH v2 09/14] sdcard: Add sd_frame136_verify_checksum()

["Philippe Mathieu-Daudé" <f4bug@amsat.org>]

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 include/hw/sd/sd.h     | 10 ++++++++++
 hw/sd/sdmmc-internal.c |  6 ++++++
 tests/sdcard-test.c    | 12 ++++++++++++
 3 files changed, 28 insertions(+)

diff --git a/include/hw/sd/sd.h b/include/hw/sd/sd.h
index 752d8edd6c..83399cd42d 100644
--- a/include/hw/sd/sd.h
+++ b/include/hw/sd/sd.h
@@ -160,6 +160,16 @@ uint8_t sd_frame136_calc_checksum(const void *content);
  */
 bool sd_frame48_verify_checksum(const void *content);
 
+/**
+ * sd_frame136_verify_checksum:
+ * @content: pointer to the frame content
+ *
+ * Verify the 7-bit CRC checksum of a 136-bit SD frame.
+ *
+ * Returns: A boolean indicating whether the frame 7-bit CRC is correct.
+ */
+bool sd_frame136_verify_checksum(const void *content);
+
 /* Legacy functions to be used only by non-qdevified callers */
 SDState *sd_init(BlockBackend *bs, bool is_spi);
 int sd_do_command(SDState *sd, SDRequest *req,
diff --git a/hw/sd/sdmmc-internal.c b/hw/sd/sdmmc-internal.c
index a9d19ce3eb..f709211401 100644
--- a/hw/sd/sdmmc-internal.c
+++ b/hw/sd/sdmmc-internal.c
@@ -111,3 +111,9 @@ bool sd_frame48_verify_checksum(const void *content)
     return sd_frame48_calc_checksum(content)
            == ((const uint8_t *)content)[F48_CONTENT_LENGTH];
 }
+
+bool sd_frame136_verify_checksum(const void *content)
+{
+    return sd_frame136_calc_checksum(content)
+           == ((const uint8_t *)content)[F136_CONTENT_LENGTH];
+}
diff --git a/tests/sdcard-test.c b/tests/sdcard-test.c
index c59af28382..81789d1f88 100644
--- a/tests/sdcard-test.c
+++ b/tests/sdcard-test.c
@@ -23,6 +23,17 @@ static void test_sd_response_frame136_crc7(void)
            sizeof(buf));
     buf[15] = sd_frame136_calc_checksum(buf);
     g_assert_cmphex(buf[15], ==, 0xad);
+
+    g_assert_true(sd_frame136_verify_checksum(buf));
+}
+
+static void test_sd_verify_cksum_frame136(void)
+{
+    uint8_t buf[16];
+
+    memset(buf, 69, sizeof(buf));
+    buf[15] = sd_frame136_calc_checksum(buf);
+    g_assert_true(sd_frame136_verify_checksum(buf));
 }
 
 int main(int argc, char *argv[])
@@ -30,6 +41,7 @@ int main(int argc, char *argv[])
     g_test_init(&argc, &argv, NULL);
 
     qtest_add_func("sd/prepare_resp136_crc7", test_sd_response_frame136_crc7);
+    qtest_add_func("sd/verify_cksum_frame136", test_sd_verify_cksum_frame136);
 
     return g_test_run();
 }
-- 
2.17.0