hw/arm/aspeed: Add fby35 machine type

Add the 'fby35-bmc' machine type based on the kernel DTS[1] and userspace
i2c setup scripts[2]. Undefined values are inherited from the AST2600-EVB.

Reference images can be found in Facebook OpenBMC Github Release assets
as "fby35.mtd". [3]

You can boot the reference images as follows (fby35 uses dual-flash):

qemu-system-arm -machine fby35-bmc \
    -drive file=fby35.mtd,format=raw,if=mtd \
    -drive file=fby35.mtd,format=raw,if=mtd \
    -nographic

[1] https://github.com/facebook/openbmc-linux/blob/412d5053258007117e94b1e36015aefc1301474b/arch/arm/boot/dts/aspeed-bmc-facebook-fby35.dts
[2] https://github.com/facebook/openbmc/blob/e2294ff5d31dd65c248fe396a385286d6d5c463d/meta-facebook/meta-fby35/recipes-fby35/plat-utils/files/setup-dev.sh
[3] https://github.com/facebook/openbmc/releases

Signed-off-by: Peter Delevoryas <pdel@fb.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220503225925.1798324-2-pdel@fb.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>

1 files changed, 63 insertions, 0 deletions

diff --git a/hw/arm/aspeed.c b/hw/arm/aspeed.c
index a74c13ab0f..725c169488 100644
--- a/hw/arm/aspeed.c
+++ b/hw/arm/aspeed.c
@@ -21,6 +21,7 @@
 #include "hw/misc/led.h"
 #include "hw/qdev-properties.h"
 #include "sysemu/block-backend.h"
+#include "sysemu/reset.h"
 #include "hw/loader.h"
 #include "qemu/error-report.h"
 #include "qemu/units.h"
@@ -951,6 +952,35 @@ static void bletchley_bmc_i2c_init(AspeedMachineState *bmc)
     i2c_slave_create_simple(i2c[12], TYPE_PCA9552, 0x67);
 }
 
+static void fby35_i2c_init(AspeedMachineState *bmc)
+{
+    AspeedSoCState *soc = &bmc->soc;
+    I2CBus *i2c[16];
+
+    for (int i = 0; i < 16; i++) {
+        i2c[i] = aspeed_i2c_get_bus(&soc->i2c, i);
+    }
+
+    i2c_slave_create_simple(i2c[2], TYPE_LM75, 0x4f);
+    i2c_slave_create_simple(i2c[8], TYPE_TMP421, 0x1f);
+    /* Hotswap controller is actually supposed to be mp5920 or ltc4282. */
+    i2c_slave_create_simple(i2c[11], "adm1272", 0x44);
+    i2c_slave_create_simple(i2c[12], TYPE_LM75, 0x4e);
+    i2c_slave_create_simple(i2c[12], TYPE_LM75, 0x4f);
+
+    aspeed_eeprom_init(i2c[4], 0x51, 128 * KiB);
+    aspeed_eeprom_init(i2c[6], 0x51, 128 * KiB);
+    aspeed_eeprom_init(i2c[8], 0x50, 32 * KiB);
+    aspeed_eeprom_init(i2c[11], 0x51, 128 * KiB);
+    aspeed_eeprom_init(i2c[11], 0x54, 128 * KiB);
+
+    /*
+     * TODO: There is a multi-master i2c connection to an AST1030 MiniBMC on
+     * buses 0, 1, 2, 3, and 9. Source address 0x10, target address 0x20 on
+     * each.
+     */
+}
+
 static bool aspeed_get_mmio_exec(Object *obj, Error **errp)
 {
     return ASPEED_MACHINE(obj)->mmio_exec;
@@ -1293,6 +1323,35 @@ static void aspeed_machine_bletchley_class_init(ObjectClass *oc, void *data)
         aspeed_soc_num_cpus(amc->soc_name);
 }
 
+static void fby35_reset(MachineState *state)
+{
+    AspeedMachineState *bmc = ASPEED_MACHINE(state);
+    AspeedGPIOState *gpio = &bmc->soc.gpio;
+
+    qemu_devices_reset();
+
+    /* Board ID */
+    object_property_set_bool(OBJECT(gpio), "gpioV4", true, &error_fatal);
+    object_property_set_bool(OBJECT(gpio), "gpioV5", true, &error_fatal);
+    object_property_set_bool(OBJECT(gpio), "gpioV6", true, &error_fatal);
+    object_property_set_bool(OBJECT(gpio), "gpioV7", false, &error_fatal);
+}
+
+static void aspeed_machine_fby35_class_init(ObjectClass *oc, void *data)
+{
+    MachineClass *mc = MACHINE_CLASS(oc);
+    AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
+
+    mc->desc       = "Facebook fby35 BMC (Cortex-A7)";
+    mc->reset      = fby35_reset;
+    amc->fmc_model = "mx66l1g45g";
+    amc->num_cs    = 2;
+    amc->macs_mask = ASPEED_MAC3_ON;
+    amc->i2c_init  = fby35_i2c_init;
+    /* FIXME: Replace this macro with something more general */
+    mc->default_ram_size = FUJI_BMC_RAM_SIZE;
+}
+
 #define AST1030_INTERNAL_FLASH_SIZE (1024 * 1024)
 /* Main SYSCLK frequency in Hz (200MHz) */
 #define SYSCLK_FRQ 200000000ULL
@@ -1412,6 +1471,10 @@ static const TypeInfo aspeed_machine_types[] = {
         .parent        = TYPE_ASPEED_MACHINE,
         .class_init    = aspeed_machine_bletchley_class_init,
     }, {
+        .name          = MACHINE_TYPE_NAME("fby35-bmc"),
+        .parent        = MACHINE_TYPE_NAME("ast2600-evb"),
+        .class_init    = aspeed_machine_fby35_class_init,
+    }, {
         .name           = MACHINE_TYPE_NAME("ast1030-evb"),
         .parent         = TYPE_ASPEED_MACHINE,
         .class_init     = aspeed_minibmc_machine_ast1030_evb_class_init,