[RFC PATCH 05/10] hw/sd: Add sd_cmd_illegal() handler

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

Log illegal commands as GUEST_ERROR.

Note: we are logging back the SDIO commands (CMD5, CMD52-54).

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/sd/sd.c | 57 ++++++++++++++++++++++--------------------------------
 1 file changed, 23 insertions(+), 34 deletions(-)

diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index ce1eec0374f..0215bdb3689 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -965,6 +965,14 @@ static sd_rsp_type_t sd_invalid_state_for_cmd(SDState *sd, SDRequest req)
     return sd_illegal;
 }
 
+static sd_rsp_type_t sd_cmd_illegal(SDState *sd, SDRequest req)
+{
+    qemu_log_mask(LOG_GUEST_ERROR, "%s: Unknown CMD%i\n",
+                  sd->proto->name, req.cmd);
+
+    return sd_illegal;
+}
+
 static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req)
 {
     uint32_t rca = 0x0000;
@@ -1017,15 +1025,10 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req)
         break;
 
     case 1:	/* CMD1:   SEND_OP_CMD */
-        if (!sd->spi)
-            goto bad_cmd;
-
         sd->state = sd_transfer_state;
         return sd_r1;
 
     case 2:	/* CMD2:   ALL_SEND_CID */
-        if (sd->spi)
-            goto bad_cmd;
         switch (sd->state) {
         case sd_ready_state:
             sd->state = sd_identification_state;
@@ -1037,8 +1040,6 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req)
         break;
 
     case 3:	/* CMD3:   SEND_RELATIVE_ADDR */
-        if (sd->spi)
-            goto bad_cmd;
         switch (sd->state) {
         case sd_identification_state:
         case sd_standby_state:
@@ -1052,8 +1053,6 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req)
         break;
 
     case 4:	/* CMD4:   SEND_DSR */
-        if (sd->spi)
-            goto bad_cmd;
         switch (sd->state) {
         case sd_standby_state:
             break;
@@ -1063,9 +1062,6 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req)
         }
         break;
 
-    case 5: /* CMD5: reserved for SDIO cards */
-        return sd_illegal;
-
     case 6:	/* CMD6:   SWITCH_FUNCTION */
         switch (sd->mode) {
         case sd_data_transfer_mode:
@@ -1081,8 +1077,6 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req)
         break;
 
     case 7:	/* CMD7:   SELECT/DESELECT_CARD */
-        if (sd->spi)
-            goto bad_cmd;
         switch (sd->state) {
         case sd_standby_state:
             if (sd->rca != rca)
@@ -1212,8 +1206,6 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req)
         break;
 
     case 15:	/* CMD15:  GO_INACTIVE_STATE */
-        if (sd->spi)
-            goto bad_cmd;
         switch (sd->mode) {
         case sd_data_transfer_mode:
             if (sd->rca != rca)
@@ -1320,8 +1312,6 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req)
         break;
 
     case 26:	/* CMD26:  PROGRAM_CID */
-        if (sd->spi)
-            goto bad_cmd;
         switch (sd->state) {
         case sd_transfer_state:
             sd->state = sd_receivingdata_state;
@@ -1466,15 +1456,6 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req)
         }
         break;
 
-    case 52 ... 54:
-        /* CMD52, CMD53, CMD54: reserved for SDIO cards
-         * (see the SDIO Simplified Specification V2.0)
-         * Handle as illegal command but do not complain
-         * on stderr, as some OSes may use these in their
-         * probing for presence of an SDIO card.
-         */
-        return sd_illegal;
-
     /* Application specific commands (Class 8) */
     case 55:	/* CMD55:  APP_CMD */
         switch (sd->state) {
@@ -1515,19 +1496,12 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req)
         break;
 
     case 58:    /* CMD58:   READ_OCR (SPI) */
-        if (!sd->spi) {
-            goto bad_cmd;
-        }
         return sd_r3;
 
     case 59:    /* CMD59:   CRC_ON_OFF (SPI) */
-        if (!sd->spi) {
-            goto bad_cmd;
-        }
         return sd_r1;
 
     default:
-    bad_cmd:
         qemu_log_mask(LOG_GUEST_ERROR, "SD: Unknown CMD%i\n", req.cmd);
         return sd_illegal;
     }
@@ -2114,10 +2088,25 @@ void sd_enable(SDState *sd, bool enable)
 
 static const SDProto sd_proto_spi = {
     .name = "SPI",
+    .cmd = {
+        [2 ... 4]   = sd_cmd_illegal,
+        [5]         = sd_cmd_illegal,
+        [7]         = sd_cmd_illegal,
+        [15]        = sd_cmd_illegal,
+        [26]        = sd_cmd_illegal,
+        [52 ... 54] = sd_cmd_illegal,
+    },
 };
 
 static const SDProto sd_proto_sd = {
     .name = "SD",
+    .cmd = {
+        [1]         = sd_cmd_illegal,
+        [5]         = sd_cmd_illegal,
+        [52 ... 54] = sd_cmd_illegal,
+        [58]        = sd_cmd_illegal,
+        [59]        = sd_cmd_illegal,
+    },
 };
 
 static void sd_instance_init(Object *obj)
-- 
2.31.1