hw/arm: Wire up BMC boot flash for npcm750-evb and quanta-gsj

This allows these NPCM7xx-based boards to boot from a flash image, e.g.
one built with OpenBMC. For example like this:

IMAGE=${OPENBMC}/build/tmp/deploy/images/gsj/image-bmc
qemu-system-arm -machine quanta-gsj -nographic \
	-drive file=${IMAGE},if=mtd,bus=0,unit=0,format=raw,snapshot=on

Reviewed-by: Tyrone Ting <kfting@nuvoton.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Havard Skinnemoen <hskinnemoen@google.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20200911052101.2602693-12-hskinnemoen@google.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/hw/arm/npcm7xx_boards.c b/hw/arm/npcm7xx_boards.c
index b4c772d6b5..79e2e2744c 100644
--- a/hw/arm/npcm7xx_boards.c
+++ b/hw/arm/npcm7xx_boards.c
@@ -20,6 +20,7 @@
 #include "hw/arm/npcm7xx.h"
 #include "hw/core/cpu.h"
 #include "hw/loader.h"
+#include "hw/qdev-properties.h"
 #include "qapi/error.h"
 #include "qemu-common.h"
 #include "qemu/units.h"
@@ -55,6 +56,22 @@ static void npcm7xx_load_bootrom(MachineState *machine, NPCM7xxState *soc)
     }
 }
 
+static void npcm7xx_connect_flash(NPCM7xxFIUState *fiu, int cs_no,
+                                  const char *flash_type, DriveInfo *dinfo)
+{
+    DeviceState *flash;
+    qemu_irq flash_cs;
+
+    flash = qdev_new(flash_type);
+    if (dinfo) {
+        qdev_prop_set_drive(flash, "drive", blk_by_legacy_dinfo(dinfo));
+    }
+    qdev_realize_and_unref(flash, BUS(fiu->spi), &error_fatal);
+
+    flash_cs = qdev_get_gpio_in_named(flash, SSI_GPIO_CS, 0);
+    qdev_connect_gpio_out_named(DEVICE(fiu), "cs", cs_no, flash_cs);
+}
+
 static void npcm7xx_connect_dram(NPCM7xxState *soc, MemoryRegion *dram)
 {
     memory_region_add_subregion(get_system_memory(), NPCM7XX_DRAM_BA, dram);
@@ -92,6 +109,7 @@ static void npcm750_evb_init(MachineState *machine)
     qdev_realize(DEVICE(soc), NULL, &error_fatal);
 
     npcm7xx_load_bootrom(machine, soc);
+    npcm7xx_connect_flash(&soc->fiu[0], 0, "w25q256", drive_get(IF_MTD, 0, 0));
     npcm7xx_load_kernel(machine, soc);
 }
 
@@ -104,6 +122,8 @@ static void quanta_gsj_init(MachineState *machine)
     qdev_realize(DEVICE(soc), NULL, &error_fatal);
 
     npcm7xx_load_bootrom(machine, soc);
+    npcm7xx_connect_flash(&soc->fiu[0], 0, "mx25l25635e",
+                          drive_get(IF_MTD, 0, 0));
     npcm7xx_load_kernel(machine, soc);
 }