hw/sd/ssi-sd: Do not create SD card within controller's realize

ssi_sd_realize() creates an "sd-card" device.  This is inappropriate,
and marked FIXME.

Move it to the boards that create these devices.  Prior art: commit
eb4f566bbb for device "generic-sdhci", and commit 26c607b86b for
device "pl181".

The device remains not user-creatable, because its users should (and
do) wire up its GPIO chip-select line.

Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Alistair Francis <Alistair.Francis@wdc.com>
Cc: Bin Meng <bin.meng@windriver.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: "Philippe Mathieu-Daudé" <f4bug@amsat.org>
Cc: qemu-arm@nongnu.org
Cc: qemu-riscv@nongnu.org
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20211117163409.3587705-2-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

hw/arm/stellaris.c

@@ -10,6 +10,7 @@
 #include "qemu/osdep.h"
 #include "qapi/error.h"
 #include "hw/sysbus.h"
+#include "hw/sd/sd.h"
 #include "hw/ssi/ssi.h"
 #include "hw/arm/boot.h"
 #include "qemu/timer.h"
@@ -1157,6 +1158,9 @@ static void stellaris_init(MachineState *ms, stellaris_board_info *board)
             void *bus;
             DeviceState *sddev;
             DeviceState *ssddev;
+            DriveInfo *dinfo;
+            DeviceState *carddev;
+            BlockBackend *blk;
 
             /*
              * Some boards have both an OLED controller and SD card connected to
@@ -1221,8 +1225,17 @@ static void stellaris_init(MachineState *ms, stellaris_board_info *board)
              *  - Make the ssd0323 OLED controller chipselect active-low
              */
             bus = qdev_get_child_bus(dev, "ssi");
-
             sddev = ssi_create_peripheral(bus, "ssi-sd");
+
+            dinfo = drive_get(IF_SD, 0, 0);
+            blk = dinfo ? blk_by_legacy_dinfo(dinfo) : NULL;
+            carddev = qdev_new(TYPE_SD_CARD);
+            qdev_prop_set_drive_err(carddev, "drive", blk, &error_fatal);
+            qdev_prop_set_bit(carddev, "spi", true);
+            qdev_realize_and_unref(carddev,
+                                   qdev_get_child_bus(sddev, "sd-bus"),
+                                   &error_fatal);
+
             ssddev = ssi_create_peripheral(bus, "ssd0323");
             gpio_out[GPIO_D][0] = qemu_irq_split(
                     qdev_get_gpio_in_named(sddev, SSI_GPIO_CS, 0),

hw/riscv/sifive_u.c

@@ -46,6 +46,7 @@
 #include "hw/char/serial.h"
 #include "hw/cpu/cluster.h"
 #include "hw/misc/unimp.h"
+#include "hw/sd/sd.h"
 #include "hw/ssi/ssi.h"
 #include "target/riscv/cpu.h"
 #include "hw/riscv/riscv_hart.h"
@@ -536,7 +537,8 @@ static void sifive_u_machine_init(MachineState *machine)
     uint32_t fdt_load_addr;
     uint64_t kernel_entry;
     DriveInfo *dinfo;
-    DeviceState *flash_dev, *sd_dev;
+    BlockBackend *blk;
+    DeviceState *flash_dev, *sd_dev, *card_dev;
     qemu_irq flash_cs, sd_cs;
 
     /* Initialize SoC */
@@ -686,6 +688,15 @@ static void sifive_u_machine_init(MachineState *machine)
 
     sd_cs = qdev_get_gpio_in_named(sd_dev, SSI_GPIO_CS, 0);
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->soc.spi2), 1, sd_cs);
+
+    dinfo = drive_get(IF_SD, 0, 0);
+    blk = dinfo ? blk_by_legacy_dinfo(dinfo) : NULL;
+    card_dev = qdev_new(TYPE_SD_CARD);
+    qdev_prop_set_drive_err(card_dev, "drive", blk, &error_fatal);
+    qdev_prop_set_bit(card_dev, "spi", true);
+    qdev_realize_and_unref(card_dev,
+                           qdev_get_child_bus(sd_dev, "sd-bus"),
+                           &error_fatal);
 }
 
 static bool sifive_u_machine_get_start_in_flash(Object *obj, Error **errp)

hw/sd/ssi-sd.c

@@ -368,36 +368,9 @@ static const VMStateDescription vmstate_ssi_sd = {
 
 static void ssi_sd_realize(SSIPeripheral *d, Error **errp)
 {
-    ERRP_GUARD();
     ssi_sd_state *s = SSI_SD(d);
-    DeviceState *carddev;
-    DriveInfo *dinfo;
 
     qbus_init(&s->sdbus, sizeof(s->sdbus), TYPE_SD_BUS, DEVICE(d), "sd-bus");
-
-    /* Create and plug in the sd card */
-    /* FIXME use a qdev drive property instead of drive_get_next() */
-    dinfo = drive_get_next(IF_SD);
-    carddev = qdev_new(TYPE_SD_CARD);
-    if (dinfo) {
-        if (!qdev_prop_set_drive_err(carddev, "drive",
-                                     blk_by_legacy_dinfo(dinfo), errp)) {
-            goto fail;
-        }
-    }
-
-    if (!object_property_set_bool(OBJECT(carddev), "spi", true, errp)) {
-        goto fail;
-    }
-
-    if (!qdev_realize_and_unref(carddev, BUS(&s->sdbus), errp)) {
-        goto fail;
-    }
-
-    return;
-
-fail:
-    error_prepend(errp, "failed to init SD card: ");
 }
 
 static void ssi_sd_reset(DeviceState *dev)
@@ -426,7 +399,7 @@ static void ssi_sd_class_init(ObjectClass *klass, void *data)
     k->cs_polarity = SSI_CS_LOW;
     dc->vmsd = &vmstate_ssi_sd;
     dc->reset = ssi_sd_reset;
-    /* Reason: init() method uses drive_get_next() */
+    /* Reason: GPIO chip-select line should be wired up */
     dc->user_creatable = false;
 }