[ot] hw/opentitan: ot_spi_device: Create GPIOs and prop for Passthrough

Signed-off-by: Alice Ziuziakowska <[email protected]>

Author: ziuziakowska

hw/opentitan/Kconfig

@@ -177,6 +177,7 @@ config OT_SOCDBG_CTRL
 
 config OT_SPI_DEVICE
     bool
+    select OT_SPI_HOST
 
 config OT_SPI_HOST
     bool

hw/opentitan/ot_spi_device.c

@@ -36,6 +36,7 @@
 #include "hw/opentitan/ot_common.h"
 #include "hw/opentitan/ot_fifo32.h"
 #include "hw/opentitan/ot_spi_device.h"
+#include "hw/opentitan/ot_spi_host.h"
 #include "hw/qdev-properties-system.h"
 #include "hw/qdev-properties.h"
 #include "hw/registerfields.h"
@@ -471,6 +472,11 @@ struct OtSPIDeviceState {
     SpiDeviceFlash flash;
     SpiDeviceTpm tpm;
 
+    OtSPIHostState *spihost;
+    /* CS signal for downstream flash in passthrough mode, active low */
+    IbexIRQ passthrough_cs;
+    IbexIRQ passthrough_en;
+
     uint32_t *spi_regs; /* Registers */
     uint32_t *tpm_regs; /* Registers */
     uint32_t *sram; /* SRAM (DPRAM on EG, E/I on DJ) */
@@ -2320,6 +2326,8 @@ static int ot_spi_device_chr_be_change(void *opaque)
 static Property ot_spi_device_properties[] = {
     DEFINE_PROP_STRING(OT_COMMON_DEV_ID, OtSPIDeviceState, ot_id),
     DEFINE_PROP_CHR("chardev", OtSPIDeviceState, chr),
+    DEFINE_PROP_LINK("spihost", OtSPIDeviceState, spihost, TYPE_OT_SPI_HOST,
+                     OtSPIHostState *),
     DEFINE_PROP_END_OF_LIST(),
 };
 
@@ -2393,6 +2401,12 @@ static void ot_spi_device_realize(DeviceState *dev, Error **errp)
 
     g_assert(s->ot_id);
 
+    /* CS is active low, Passthrough enable is active high */
+    ibex_qdev_init_irq_default(OBJECT(s), &s->passthrough_cs, "passthrough-cs",
+                               1);
+    ibex_qdev_init_irq_default(OBJECT(s), &s->passthrough_en, "passthrough-en",
+                               0);
+
     qemu_chr_fe_set_handlers(&s->chr, &ot_spi_device_chr_can_receive,
                              &ot_spi_device_chr_receive,
                              &ot_spi_device_chr_event_hander,