[Qemu-devel] [PATCH 09/20] sdcard: Expose sd_crc*() functions for QTest use

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

Take those functions out of hw/sd/sd.c (via "sdmmc-internal.h")
to be able to write QTests for them.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/sd/sdmmc-internal.h | 22 ++++++++++++++++++++++
 hw/sd/sd.c             | 37 -------------------------------------
 hw/sd/sdmmc-internal.c | 38 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 60 insertions(+), 37 deletions(-)

diff --git a/hw/sd/sdmmc-internal.h b/hw/sd/sdmmc-internal.h
index 9aa04766fc..62c0ff250d 100644
--- a/hw/sd/sdmmc-internal.h
+++ b/hw/sd/sdmmc-internal.h
@@ -36,4 +36,26 @@ const char *sd_cmd_name(uint8_t cmd);
  */
 const char *sd_acmd_name(uint8_t cmd);
 
+/**
+ * sd_crc7:
+ * @data: pointer to the data buffer
+ * @data_len: data length
+ *
+ * Calculate the 7-bit CRC of a SD frame.
+ *
+ * Returns: The frame CRC.
+ */
+uint8_t sd_crc7(const void *data, size_t data_len);
+
+/**
+ * sd_crc16:
+ * @data: pointer to the data buffer
+ * @data_len: data length
+ *
+ * Calculate the 16-bit CRC of a SD data frame.
+ *
+ * Returns: The frame CRC.
+ */
+uint16_t sd_crc16(const void *data, size_t data_len);
+
 #endif
diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index a28ef8de5e..11b4606051 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -237,43 +237,6 @@ static const int sd_cmd_class[SDMMC_CMD_MAX] = {
     7,  7, 10,  7,  9,  9,  9,  8,  8, 10,  8,  8,  8,  8,  8,  8,
 };
 
-static uint8_t sd_crc7(const void *message, size_t width)
-{
-    int i, bit;
-    uint8_t shift_reg = 0x00;
-    const uint8_t *msg = (const uint8_t *)message;
-
-    for (i = 0; i < width; i++, msg++) {
-        for (bit = 7; bit >= 0; bit--) {
-            shift_reg <<= 1;
-            if ((shift_reg >> 7) ^ ((*msg >> bit) & 1)) {
-                shift_reg ^= 0x89;
-            }
-        }
-    }
-
-    return shift_reg;
-}
-
-static uint16_t sd_crc16(const void *message, size_t width)
-{
-    int i, bit;
-    uint16_t shift_reg = 0x0000;
-    const uint16_t *msg = (const uint16_t *)message;
-    width <<= 1;
-
-    for (i = 0; i < width; i++, msg++) {
-        for (bit = 15; bit >= 0; bit--) {
-            shift_reg <<= 1;
-            if ((shift_reg >> 15) ^ ((*msg >> bit) & 1)) {
-                shift_reg ^= 0x1011;
-            }
-        }
-    }
-
-    return shift_reg;
-}
-
 #define OCR_POWER_DELAY_NS      500000 /* 0.5ms */
 
 FIELD(OCR, VDD_VOLTAGE_WINDOW,          0, 24)
diff --git a/hw/sd/sdmmc-internal.c b/hw/sd/sdmmc-internal.c
index 2053def3f1..69ad0a99e6 100644
--- a/hw/sd/sdmmc-internal.c
+++ b/hw/sd/sdmmc-internal.c
@@ -70,3 +70,41 @@ const char *sd_acmd_name(uint8_t cmd)
 
     return acmd_abbrev[cmd] ? acmd_abbrev[cmd] : "UNKNOWN_ACMD";
 }
+
+/* 7 bit CRC with polynomial x^7 + x^3 + 1 */
+uint8_t sd_crc7(const void *message, size_t width)
+{
+    int i, bit;
+    uint8_t shift_reg = 0x00;
+    const uint8_t *msg = (const uint8_t *)message;
+
+    for (i = 0; i < width; i++, msg++) {
+        for (bit = 7; bit >= 0; bit--) {
+            shift_reg <<= 1;
+            if ((shift_reg >> 7) ^ ((*msg >> bit) & 1)) {
+                shift_reg ^= 0x89;
+            }
+        }
+    }
+
+    return shift_reg;
+}
+
+uint16_t sd_crc16(const void *message, size_t width)
+{
+    int i, bit;
+    uint16_t shift_reg = 0x0000;
+    const uint16_t *msg = (const uint16_t *)message;
+    width <<= 1;
+
+    for (i = 0; i < width; i++, msg++) {
+        for (bit = 15; bit >= 0; bit--) {
+            shift_reg <<= 1;
+            if ((shift_reg >> 15) ^ ((*msg >> bit) & 1)) {
+                shift_reg ^= 0x1011;
+            }
+        }
+    }
+
+    return shift_reg;
+}
-- 
2.17.0