[PULL 11/18] hw/sd: sd: Only SDSC cards support CMD28/29/30

[Philippe Mathieu-Daudé]

From: Bin Meng <bin.meng@windriver.com>

Per the "Physical Layer Specification Version 8.00", table 4-26
(SD mode) and table 7-3 (SPI mode) command descriptions, the
following commands:

- CMD28 (SET_WRITE_PROT)
- CMD29 (CLR_WRITE_PROT)
- CMD30 (SEND_WRITE_PROT)

are only supported by SDSC cards.

Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210216150225.27996-3-bmeng.cn@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/sd/sd.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index 7adcb4edfaa..dd1ce0bdae4 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -1284,6 +1284,10 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, 
SDRequest req)
 
     /* Write protection (Class 6) */
     case 28:   /* CMD28:  SET_WRITE_PROT */
+        if (sd->size > SDSC_MAX_CAPACITY) {
+            return sd_illegal;
+        }
+
         switch (sd->state) {
         case sd_transfer_state:
             if (addr >= sd->size) {
@@ -1303,6 +1307,10 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, 
SDRequest req)
         break;
 
     case 29:   /* CMD29:  CLR_WRITE_PROT */
+        if (sd->size > SDSC_MAX_CAPACITY) {
+            return sd_illegal;
+        }
+
         switch (sd->state) {
         case sd_transfer_state:
             if (addr >= sd->size) {
@@ -1322,6 +1330,10 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, 
SDRequest req)
         break;
 
     case 30:   /* CMD30:  SEND_WRITE_PROT */
+        if (sd->size > SDSC_MAX_CAPACITY) {
+            return sd_illegal;
+        }
+
         switch (sd->state) {
         case sd_transfer_state:
             sd->state = sd_sendingdata_state;
-- 
2.26.2