hw/arm: Add GMAC devices to NPCM7XX SoC

Change-Id: Id8a3461fb5042adc4c3fd6f4fbd1ca0d33e22565
Signed-off-by: Hao Wu <wuhaotsh@google.com>
Signed-off-by: Nabih Estefan <nabihestefan@google.com>
Reviewed-by: Tyrone Ting <kfting@nuvoton.com>
Message-id: 20240131002800.989285-3-nabihestefan@google.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 37 insertions, 2 deletions

diff --git a/hw/arm/npcm7xx.c b/hw/arm/npcm7xx.c
index e3243a5..d9dfdfc 100644
--- a/hw/arm/npcm7xx.c
+++ b/hw/arm/npcm7xx.c
@@ -84,8 +84,10 @@ enum NPCM7xxInterrupt {
     NPCM7XX_UART1_IRQ,
     NPCM7XX_UART2_IRQ,
     NPCM7XX_UART3_IRQ,
+    NPCM7XX_GMAC1_IRQ           = 14,
     NPCM7XX_EMC1RX_IRQ          = 15,
     NPCM7XX_EMC1TX_IRQ,
+    NPCM7XX_GMAC2_IRQ,
     NPCM7XX_MMC_IRQ             = 26,
     NPCM7XX_PSPI2_IRQ           = 28,
     NPCM7XX_PSPI1_IRQ           = 31,
@@ -229,6 +231,12 @@ static const hwaddr npcm7xx_pspi_addr[] = {
     0xf0201000,
 };
 
+/* Register base address for each GMAC Module */
+static const hwaddr npcm7xx_gmac_addr[] = {
+    0xf0802000,
+    0xf0804000,
+};
+
 static const struct {
     hwaddr regs_addr;
     uint32_t unconnected_pins;
@@ -457,6 +465,10 @@ static void npcm7xx_init(Object *obj)
         object_initialize_child(obj, "pspi[*]", &s->pspi[i], TYPE_NPCM_PSPI);
     }
 
+    for (i = 0; i < ARRAY_SIZE(s->gmac); i++) {
+        object_initialize_child(obj, "gmac[*]", &s->gmac[i], TYPE_NPCM_GMAC);
+    }
+
     object_initialize_child(obj, "mmc", &s->mmc, TYPE_NPCM7XX_SDHCI);
 }
 
@@ -689,6 +701,29 @@ static void npcm7xx_realize(DeviceState *dev, Error **errp)
     }
 
     /*
+     * GMAC Modules. Cannot fail.
+     */
+    QEMU_BUILD_BUG_ON(ARRAY_SIZE(npcm7xx_gmac_addr) != ARRAY_SIZE(s->gmac));
+    QEMU_BUILD_BUG_ON(ARRAY_SIZE(s->gmac) != 2);
+    for (i = 0; i < ARRAY_SIZE(s->gmac); i++) {
+        SysBusDevice *sbd = SYS_BUS_DEVICE(&s->gmac[i]);
+
+        /*
+         * The device exists regardless of whether it's connected to a QEMU
+         * netdev backend. So always instantiate it even if there is no
+         * backend.
+         */
+        sysbus_realize(sbd, &error_abort);
+        sysbus_mmio_map(sbd, 0, npcm7xx_gmac_addr[i]);
+        int irq = i == 0 ? NPCM7XX_GMAC1_IRQ : NPCM7XX_GMAC2_IRQ;
+        /*
+         * N.B. The values for the second argument sysbus_connect_irq are
+         * chosen to match the registration order in npcm7xx_emc_realize.
+         */
+        sysbus_connect_irq(sbd, 0, npcm7xx_irq(s, irq));
+    }
+
+    /*
      * Flash Interface Unit (FIU). Can fail if incorrect number of chip selects
      * specified, but this is a programming error.
      */
@@ -750,8 +785,6 @@ static void npcm7xx_realize(DeviceState *dev, Error **errp)
     create_unimplemented_device("npcm7xx.siox[2]",      0xf0102000,   4 * KiB);
     create_unimplemented_device("npcm7xx.ahbpci",       0xf0400000,   1 * MiB);
     create_unimplemented_device("npcm7xx.mcphy",        0xf05f0000,  64 * KiB);
-    create_unimplemented_device("npcm7xx.gmac1",        0xf0802000,   8 * KiB);
-    create_unimplemented_device("npcm7xx.gmac2",        0xf0804000,   8 * KiB);
     create_unimplemented_device("npcm7xx.vcd",          0xf0810000,  64 * KiB);
     create_unimplemented_device("npcm7xx.ece",          0xf0820000,   8 * KiB);
     create_unimplemented_device("npcm7xx.vdma",         0xf0822000,   8 * KiB);
diff --git a/include/hw/arm/npcm7xx.h b/include/hw/arm/npcm7xx.h
index 72c7722..4e0d210 100644
--- a/include/hw/arm/npcm7xx.h
+++ b/include/hw/arm/npcm7xx.h
@@ -29,6 +29,7 @@
 #include "hw/misc/npcm7xx_pwm.h"
 #include "hw/misc/npcm7xx_rng.h"
 #include "hw/net/npcm7xx_emc.h"
+#include "hw/net/npcm_gmac.h"
 #include "hw/nvram/npcm7xx_otp.h"
 #include "hw/timer/npcm7xx_timer.h"
 #include "hw/ssi/npcm7xx_fiu.h"
@@ -104,6 +105,7 @@ struct NPCM7xxState {
     OHCISysBusState     ohci;
     NPCM7xxFIUState     fiu[2];
     NPCM7xxEMCState     emc[2];
+    NPCMGMACState       gmac[2];
     NPCM7xxSDHCIState   mmc;
     NPCMPSPIState       pspi[2];
 };