[PATCH v3 06/30] hw/arm/aspeed: Split G220A machine into a separate source file for better maintenance

[Jamin Lin via <qemu-devel@nongnu.org>]

This commit refactors the Bytedance G220A BMC machine by moving its
implementation from aspeed.c into a new dedicated file
aspeed_ast2500_g220a.c.

The goal is to improve modularity and maintainability of Aspeed
machine definitions by isolating each platform into its own source
file. This aligns with ongoing efforts to simplify aspeed.c,
which previously contained all machine configurations.

Key updates include:

- Moved G220A_BMC_HW_STRAP1 definition and
g220a_bmc_i2c_init() function into aspeed_ast2500_g220a.c.
- Moved aspeed_machine_g220a_class_init() and related type
registration to the new file.
- Added the new file to the build system (meson.build).
- Removed all G220A-specific code from aspeed.c.

No functional changes.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
---
 hw/arm/aspeed.c               | 72 ---------------------------
 hw/arm/aspeed_ast2500_g220a.c | 93 +++++++++++++++++++++++++++++++++++
 hw/arm/meson.build            |  1 +
 3 files changed, 94 insertions(+), 72 deletions(-)
 create mode 100644 hw/arm/aspeed_ast2500_g220a.c

diff --git a/hw/arm/aspeed.c b/hw/arm/aspeed.c
index 3dcd5fc540..ed8ef6a2d0 100644
--- a/hw/arm/aspeed.c
+++ b/hw/arm/aspeed.c
@@ -117,20 +117,6 @@ static struct arm_boot_info aspeed_board_binfo = {
         SCU_HW_STRAP_VGA_SIZE_SET(VGA_16M_DRAM) |                       \
         SCU_AST2500_HW_STRAP_RESERVED1)
 
-#define G220A_BMC_HW_STRAP1 (                                      \
-        SCU_AST2500_HW_STRAP_SPI_AUTOFETCH_ENABLE |                     \
-        SCU_AST2500_HW_STRAP_GPIO_STRAP_ENABLE |                        \
-        SCU_AST2500_HW_STRAP_UART_DEBUG |                               \
-        SCU_AST2500_HW_STRAP_RESERVED28 |                               \
-        SCU_AST2500_HW_STRAP_DDR4_ENABLE |                              \
-        SCU_HW_STRAP_2ND_BOOT_WDT |                                     \
-        SCU_HW_STRAP_VGA_CLASS_CODE |                                   \
-        SCU_HW_STRAP_LPC_RESET_PIN |                                    \
-        SCU_HW_STRAP_SPI_MODE(SCU_HW_STRAP_SPI_MASTER) |                \
-        SCU_AST2500_HW_STRAP_SET_AXI_AHB_RATIO(AXI_AHB_RATIO_2_1) |     \
-        SCU_HW_STRAP_VGA_SIZE_SET(VGA_64M_DRAM) |                       \
-        SCU_AST2500_HW_STRAP_RESERVED1)
-
 /* Witherspoon hardware value: 0xF10AD216 (but use romulus definition) */
 #define WITHERSPOON_BMC_HW_STRAP1 ROMULUS_BMC_HW_STRAP1
 
@@ -635,42 +621,6 @@ static void witherspoon_bmc_i2c_init(AspeedMachineState *bmc)
     /* Bus 11: TODO ucd90160@64 */
 }
 
-static void g220a_bmc_i2c_init(AspeedMachineState *bmc)
-{
-    AspeedSoCState *soc = bmc->soc;
-    DeviceState *dev;
-
-    dev = DEVICE(i2c_slave_create_simple(aspeed_i2c_get_bus(&soc->i2c, 3),
-                                         "emc1413", 0x4c));
-    object_property_set_int(OBJECT(dev), "temperature0", 31000, &error_abort);
-    object_property_set_int(OBJECT(dev), "temperature1", 28000, &error_abort);
-    object_property_set_int(OBJECT(dev), "temperature2", 20000, &error_abort);
-
-    dev = DEVICE(i2c_slave_create_simple(aspeed_i2c_get_bus(&soc->i2c, 12),
-                                         "emc1413", 0x4c));
-    object_property_set_int(OBJECT(dev), "temperature0", 31000, &error_abort);
-    object_property_set_int(OBJECT(dev), "temperature1", 28000, &error_abort);
-    object_property_set_int(OBJECT(dev), "temperature2", 20000, &error_abort);
-
-    dev = DEVICE(i2c_slave_create_simple(aspeed_i2c_get_bus(&soc->i2c, 13),
-                                         "emc1413", 0x4c));
-    object_property_set_int(OBJECT(dev), "temperature0", 31000, &error_abort);
-    object_property_set_int(OBJECT(dev), "temperature1", 28000, &error_abort);
-    object_property_set_int(OBJECT(dev), "temperature2", 20000, &error_abort);
-
-    static uint8_t eeprom_buf[2 * 1024] = {
-            0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0xfe,
-            0x01, 0x06, 0x00, 0xc9, 0x42, 0x79, 0x74, 0x65,
-            0x64, 0x61, 0x6e, 0x63, 0x65, 0xc5, 0x47, 0x32,
-            0x32, 0x30, 0x41, 0xc4, 0x41, 0x41, 0x42, 0x42,
-            0xc4, 0x43, 0x43, 0x44, 0x44, 0xc4, 0x45, 0x45,
-            0x46, 0x46, 0xc4, 0x48, 0x48, 0x47, 0x47, 0xc1,
-            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa7,
-    };
-    smbus_eeprom_init_one(aspeed_i2c_get_bus(&soc->i2c, 4), 0x57,
-                          eeprom_buf);
-}
-
 static void rainier_bmc_i2c_init(AspeedMachineState *bmc)
 {
     AspeedSoCState *soc = bmc->soc;
@@ -1549,23 +1499,6 @@ static void aspeed_machine_ast2600_evb_class_init(ObjectClass *oc,
     aspeed_machine_ast2600_class_emmc_init(oc);
 };
 
-static void aspeed_machine_g220a_class_init(ObjectClass *oc, const void *data)
-{
-    MachineClass *mc = MACHINE_CLASS(oc);
-    AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
-
-    mc->desc       = "Bytedance G220A BMC (ARM1176)";
-    amc->soc_name  = "ast2500-a1";
-    amc->hw_strap1 = G220A_BMC_HW_STRAP1;
-    amc->fmc_model = "n25q512a";
-    amc->spi_model = "mx25l25635e";
-    amc->num_cs    = 2;
-    amc->macs_mask  = ASPEED_MAC0_ON | ASPEED_MAC1_ON;
-    amc->i2c_init  = g220a_bmc_i2c_init;
-    mc->default_ram_size = 1024 * MiB;
-    aspeed_machine_class_init_cpus_defaults(mc);
-};
-
 static void aspeed_machine_rainier_class_init(ObjectClass *oc, const void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
@@ -1939,11 +1872,6 @@ static const TypeInfo aspeed_machine_types[] = {
         .parent        = TYPE_ASPEED_MACHINE,
         .class_init    = aspeed_machine_tiogapass_class_init,
         .interfaces    = arm_machine_interfaces,
-    }, {
-        .name          = MACHINE_TYPE_NAME("g220a-bmc"),
-        .parent        = TYPE_ASPEED_MACHINE,
-        .class_init    = aspeed_machine_g220a_class_init,
-        .interfaces    = arm_machine_interfaces,
     }, {
         .name          = MACHINE_TYPE_NAME("qcom-dc-scm-v1-bmc"),
         .parent        = TYPE_ASPEED_MACHINE,
diff --git a/hw/arm/aspeed_ast2500_g220a.c b/hw/arm/aspeed_ast2500_g220a.c
new file mode 100644
index 0000000000..c7899ed1df
--- /dev/null
+++ b/hw/arm/aspeed_ast2500_g220a.c
@@ -0,0 +1,93 @@
+/*
+ * Bytedance G220A
+ *
+ * Copyright (C) 2025 ASPEED Technology Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "hw/arm/machines-qom.h"
+#include "hw/arm/aspeed.h"
+#include "hw/arm/aspeed_soc.h"
+#include "hw/i2c/smbus_eeprom.h"
+
+#define G220A_BMC_HW_STRAP1 (                                      \
+        SCU_AST2500_HW_STRAP_SPI_AUTOFETCH_ENABLE |                     \
+        SCU_AST2500_HW_STRAP_GPIO_STRAP_ENABLE |                        \
+        SCU_AST2500_HW_STRAP_UART_DEBUG |                               \
+        SCU_AST2500_HW_STRAP_RESERVED28 |                               \
+        SCU_AST2500_HW_STRAP_DDR4_ENABLE |                              \
+        SCU_HW_STRAP_2ND_BOOT_WDT |                                     \
+        SCU_HW_STRAP_VGA_CLASS_CODE |                                   \
+        SCU_HW_STRAP_LPC_RESET_PIN |                                    \
+        SCU_HW_STRAP_SPI_MODE(SCU_HW_STRAP_SPI_MASTER) |                \
+        SCU_AST2500_HW_STRAP_SET_AXI_AHB_RATIO(AXI_AHB_RATIO_2_1) |     \
+        SCU_HW_STRAP_VGA_SIZE_SET(VGA_64M_DRAM) |                       \
+        SCU_AST2500_HW_STRAP_RESERVED1)
+
+static void g220a_bmc_i2c_init(AspeedMachineState *bmc)
+{
+    AspeedSoCState *soc = bmc->soc;
+    DeviceState *dev;
+
+    dev = DEVICE(i2c_slave_create_simple(aspeed_i2c_get_bus(&soc->i2c, 3),
+                                         "emc1413", 0x4c));
+    object_property_set_int(OBJECT(dev), "temperature0", 31000, &error_abort);
+    object_property_set_int(OBJECT(dev), "temperature1", 28000, &error_abort);
+    object_property_set_int(OBJECT(dev), "temperature2", 20000, &error_abort);
+
+    dev = DEVICE(i2c_slave_create_simple(aspeed_i2c_get_bus(&soc->i2c, 12),
+                                         "emc1413", 0x4c));
+    object_property_set_int(OBJECT(dev), "temperature0", 31000, &error_abort);
+    object_property_set_int(OBJECT(dev), "temperature1", 28000, &error_abort);
+    object_property_set_int(OBJECT(dev), "temperature2", 20000, &error_abort);
+
+    dev = DEVICE(i2c_slave_create_simple(aspeed_i2c_get_bus(&soc->i2c, 13),
+                                         "emc1413", 0x4c));
+    object_property_set_int(OBJECT(dev), "temperature0", 31000, &error_abort);
+    object_property_set_int(OBJECT(dev), "temperature1", 28000, &error_abort);
+    object_property_set_int(OBJECT(dev), "temperature2", 20000, &error_abort);
+
+    static uint8_t eeprom_buf[2 * 1024] = {
+            0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0xfe,
+            0x01, 0x06, 0x00, 0xc9, 0x42, 0x79, 0x74, 0x65,
+            0x64, 0x61, 0x6e, 0x63, 0x65, 0xc5, 0x47, 0x32,
+            0x32, 0x30, 0x41, 0xc4, 0x41, 0x41, 0x42, 0x42,
+            0xc4, 0x43, 0x43, 0x44, 0x44, 0xc4, 0x45, 0x45,
+            0x46, 0x46, 0xc4, 0x48, 0x48, 0x47, 0x47, 0xc1,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa7,
+    };
+    smbus_eeprom_init_one(aspeed_i2c_get_bus(&soc->i2c, 4), 0x57,
+                          eeprom_buf);
+}
+
+static void aspeed_machine_g220a_class_init(ObjectClass *oc, const void *data)
+{
+    MachineClass *mc = MACHINE_CLASS(oc);
+    AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
+
+    mc->desc       = "Bytedance G220A BMC (ARM1176)";
+    amc->soc_name  = "ast2500-a1";
+    amc->hw_strap1 = G220A_BMC_HW_STRAP1;
+    amc->fmc_model = "n25q512a";
+    amc->spi_model = "mx25l25635e";
+    amc->num_cs    = 2;
+    amc->macs_mask  = ASPEED_MAC0_ON | ASPEED_MAC1_ON;
+    amc->i2c_init  = g220a_bmc_i2c_init;
+    mc->default_ram_size = 1024 * MiB;
+    aspeed_machine_class_init_cpus_defaults(mc);
+};
+
+static const TypeInfo aspeed_ast2500_g220a_types[] = {
+    {
+        .name          = MACHINE_TYPE_NAME("g220a-bmc"),
+        .parent        = TYPE_ASPEED_MACHINE,
+        .class_init    = aspeed_machine_g220a_class_init,
+        .interfaces    = arm_machine_interfaces,
+    }
+};
+
+DEFINE_TYPES(aspeed_ast2500_g220a_types)
+
diff --git a/hw/arm/meson.build b/hw/arm/meson.build
index ed637f2687..91bdefd203 100644
--- a/hw/arm/meson.build
+++ b/hw/arm/meson.build
@@ -45,6 +45,7 @@ arm_ss.add(when: 'CONFIG_ASPEED_SOC', if_true: files(
   'aspeed_soc_common.c',
   'aspeed_ast2400.c',
   'aspeed_ast2500_fp5280g2.c',
+  'aspeed_ast2500_g220a.c',
   'aspeed_ast2600.c',
   'aspeed_ast10x0.c',
   'aspeed_eeprom.c',
-- 
2.43.0