[Qemu-devel] [PATCH v2 13/25] sdcard: let function handling response codes returns the response size

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

this will ease cases when the response is different regarding the protocol
use (SPI, MMC).

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/sd/sd.c | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index e6a6e0b2ad..7e9d7366fe 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -460,7 +460,7 @@ static int sd_req_crc_validate(SDRequest *req)
     return sd_crc7(buffer, 5) != req->crc;	/* TODO */
 }
 
-static void sd_response_r1_make(SDState *sd, uint8_t *response)
+static size_t sd_response_r1_make(SDState *sd, uint8_t *response)
 {
     uint32_t status = sd->card_status;
     /* Clear the "clear on read" status bits */
@@ -470,14 +470,25 @@ static void sd_response_r1_make(SDState *sd, uint8_t *response)
     response[1] = (status >> 16) & 0xff;
     response[2] = (status >> 8) & 0xff;
     response[3] = (status >> 0) & 0xff;
+
+    return 4;
+}
+
+static size_t sd_response_r2s_make(SDState *sd, uint8_t *response)
+{
+    memcpy(response, sd->csd, sizeof(sd->csd));
+
+    return 16;
 }
 
-static void sd_response_r3_make(SDState *sd, uint8_t *response)
+static size_t sd_response_r3_make(SDState *sd, uint8_t *response)
 {
     response[0] = (sd->ocr >> 24) & 0xff;
     response[1] = (sd->ocr >> 16) & 0xff;
     response[2] = (sd->ocr >> 8) & 0xff;
     response[3] = (sd->ocr >> 0) & 0xff;
+
+    return 4;
 }
 
 static void sd_response_r6_make(SDState *sd, uint8_t *response)
@@ -1513,8 +1524,7 @@ send_response:
     switch (rtype) {
     case sd_r1:
     case sd_r1b:
-        sd_response_r1_make(sd, response);
-        rsplen = 4;
+        rsplen = sd_response_r1_make(sd, response);
         break;
 
     case sd_r2_i:
@@ -1523,13 +1533,11 @@ send_response:
         break;
 
     case sd_r2_s:
-        memcpy(response, sd->csd, sizeof(sd->csd));
-        rsplen = 16;
+        rsplen = sd_response_r2s_make(sd, response);
         break;
 
     case sd_r3:
-        sd_response_r3_make(sd, response);
-        rsplen = 4;
+        rsplen = sd_response_r3_make(sd, response);
         break;
 
     case sd_r6:
-- 
2.15.1