[PATCH v2 03/12] hw/sd/sdcard: Track last command used to help logging

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

The command is selected on the I/O lines, and further
processing might be done on the DAT lines via the
sd_read_byte() and sd_write_byte() handlers. Since
these methods can't distinct between normal and APP
commands, keep the name of the current command in
the SDState and use it in the DAT handlers. This
fixes a bug that all normal commands were displayed
as APP commands.

Fixes: 2ed61fb57b ("sdcard: Display command name when tracing CMD/ACMD")
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Cédric Le Goater <clg@redhat.com>
---
 hw/sd/sd.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index ec58c5e2a6..14bfcc5d6b 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -134,6 +134,7 @@ struct SDState {
     uint32_t pwd_len;
     uint8_t function_group[6];
     uint8_t current_cmd;
+    const char *last_cmd_name;
     /* True if we will handle the next command as an ACMD. Note that this does
      * *not* track the APP_CMD status bit!
      */
@@ -1150,12 +1151,13 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req)
     uint16_t rca;
     uint64_t addr;
 
+    sd->last_cmd_name = sd_cmd_name(req.cmd);
     /* CMD55 precedes an ACMD, so we are not interested in tracing it.
      * However there is no ACMD55, so we want to trace this particular case.
      */
     if (req.cmd != 55 || sd->expecting_acmd) {
         trace_sdcard_normal_command(sd_proto(sd)->name,
-                                    sd_cmd_name(req.cmd), req.cmd,
+                                    sd->last_cmd_name, req.cmd,
                                     req.arg, sd_state_name(sd->state));
     }
 
@@ -1616,7 +1618,8 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req)
 static sd_rsp_type_t sd_app_command(SDState *sd,
                                     SDRequest req)
 {
-    trace_sdcard_app_command(sd_proto(sd)->name, sd_acmd_name(req.cmd),
+    sd->last_cmd_name = sd_acmd_name(req.cmd);
+    trace_sdcard_app_command(sd_proto(sd)->name, sd->last_cmd_name,
                              req.cmd, req.arg, sd_state_name(sd->state));
     sd->card_status |= APP_CMD;
 
@@ -1909,7 +1912,7 @@ void sd_write_byte(SDState *sd, uint8_t value)
         return;
 
     trace_sdcard_write_data(sd_proto(sd)->name,
-                            sd_acmd_name(sd->current_cmd),
+                            sd->last_cmd_name,
                             sd->current_cmd, value);
     switch (sd->current_cmd) {
     case 24:  /* CMD24:  WRITE_SINGLE_BLOCK */
@@ -2065,7 +2068,7 @@ uint8_t sd_read_byte(SDState *sd)
     io_len = (sd->ocr & (1 << 30)) ? 512 : sd->blk_len;
 
     trace_sdcard_read_data(sd_proto(sd)->name,
-                           sd_acmd_name(sd->current_cmd),
+                           sd->last_cmd_name,
                            sd->current_cmd, io_len);
     switch (sd->current_cmd) {
     case 6:  /* CMD6:   SWITCH_FUNCTION */
@@ -2210,6 +2213,7 @@ static void sd_instance_init(Object *obj)
 {
     SDState *sd = SD_CARD(obj);
 
+    sd->last_cmd_name = "UNSET";
     sd->enable = true;
     sd->ocr_power_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, sd_ocr_powerup, sd);
 }
-- 
2.41.0