[PATCH 14/23] hw/sd/sdcard: Factor sd_req_get_rca() method out

[Philippe Mathieu-Daudé]

Extract sd_req_get_rca() so we can re-use it in various
SDProto handlers. Return a 16-bit value since RCA is 16-bit.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/sd/sd.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index 510784fc82..bc47ae36bc 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -471,6 +471,14 @@ static void sd_set_csd(SDState *sd, uint64_t size)
     sd->csd[15] = (sd_crc7(sd->csd, 15) << 1) | 1;
 }
 
+static uint16_t sd_req_get_rca(SDState *s, SDRequest req)
+{
+    if (sd_cmd_type[req.cmd] == sd_ac || sd_cmd_type[req.cmd] == sd_adtc) {
+        return req.arg >> 16;
+    }
+    return 0;
+}
+
 FIELD(CSR, AKE_SEQ_ERROR,               3,  1)
 FIELD(CSR, APP_CMD,                     5,  1)
 FIELD(CSR, FX_EVENT,                    6,  1)
@@ -1094,7 +1102,7 @@ static sd_rsp_type_t sd_cmd_SET_BLOCK_COUNT(SDState *sd, 
SDRequest req)
 
 static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req)
 {
-    uint32_t rca = 0x0000;
+    uint16_t rca = sd_req_get_rca(sd, req);
     uint64_t addr = (sd->ocr & (1 << 30)) ? (uint64_t) req.arg << 9 : req.arg;
 
     sd->last_cmd_name = sd_cmd_name(req.cmd);
@@ -1110,11 +1118,6 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, 
SDRequest req)
     /* Not interpreting this as an app command */
     sd->card_status &= ~APP_CMD;
 
-    if (sd_cmd_type[req.cmd] == sd_ac
-        || sd_cmd_type[req.cmd] == sd_adtc) {
-        rca = req.arg >> 16;
-    }
-
     /* CMD23 (set block count) must be immediately followed by CMD18 or CMD25
      * if not, its effects are cancelled */
     if (sd->multi_blk_cnt != 0 && !(req.cmd == 18 || req.cmd == 25)) {
-- 
2.41.0