aspeed: Add I2C buses to AST1030 model

Instantiate the I2C buses in AST1030 model and create two slave device
for ast1030-evb.

Signed-off-by: Troy Lee <troy_lee@aspeedtech.com>
Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Signed-off-by: Steven Lee <steven_lee@aspeedtech.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
[ clg : - adapted to current AST1030 upstream models
        - changed AST2600 to AST1030 in comment
        - fixed typo in commit log ]
Message-Id: <20220324100439.478317-3-troy_lee@aspeedtech.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>

2 files changed, 31 insertions, 0 deletions

diff --git a/hw/arm/aspeed.c b/hw/arm/aspeed.c
index c49772e..a06f7c1 100644
--- a/hw/arm/aspeed.c
+++ b/hw/arm/aspeed.c
@@ -1397,6 +1397,18 @@ static void aspeed_minibmc_machine_init(MachineState *machine)
                        AST1030_INTERNAL_FLASH_SIZE);
 }
 
+static void ast1030_evb_i2c_init(AspeedMachineState *bmc)
+{
+    AspeedSoCState *soc = &bmc->soc;
+
+    /* U10 24C08 connects to SDA/SCL Groupt 1 by default */
+    uint8_t *eeprom_buf = g_malloc0(32 * 1024);
+    smbus_eeprom_init_one(aspeed_i2c_get_bus(&soc->i2c, 0), 0x50, eeprom_buf);
+
+    /* U11 LM75 connects to SDA/SCL Group 2 by default */
+    i2c_slave_create_simple(aspeed_i2c_get_bus(&soc->i2c, 1), "tmp105", 0x4d);
+}
+
 static void aspeed_minibmc_machine_ast1030_evb_class_init(ObjectClass *oc,
                                                           void *data)
 {
@@ -1408,6 +1420,7 @@ static void aspeed_minibmc_machine_ast1030_evb_class_init(ObjectClass *oc,
     amc->hw_strap1 = 0;
     amc->hw_strap2 = 0;
     mc->init = aspeed_minibmc_machine_init;
+    amc->i2c_init = ast1030_evb_i2c_init;
     mc->default_ram_size = 0;
     mc->default_cpus = mc->min_cpus = mc->max_cpus = 1;
     amc->fmc_model = "sst25vf032b";
diff --git a/hw/arm/aspeed_ast10x0.c b/hw/arm/aspeed_ast10x0.c
index d534541..5df480a 100644
--- a/hw/arm/aspeed_ast10x0.c
+++ b/hw/arm/aspeed_ast10x0.c
@@ -114,6 +114,9 @@ static void aspeed_soc_ast1030_init(Object *obj)
     object_property_add_alias(obj, "hw-strap1", OBJECT(&s->scu), "hw-strap1");
     object_property_add_alias(obj, "hw-strap2", OBJECT(&s->scu), "hw-strap2");
 
+    snprintf(typename, sizeof(typename), "aspeed.i2c-%s", socname);
+    object_initialize_child(obj, "i2c", &s->i2c, typename);
+
     snprintf(typename, sizeof(typename), "aspeed.timer-%s", socname);
     object_initialize_child(obj, "timerctrl", &s->timerctrl, typename);
 
@@ -188,6 +191,21 @@ static void aspeed_soc_ast1030_realize(DeviceState *dev_soc, Error **errp)
     }
     sysbus_mmio_map(SYS_BUS_DEVICE(&s->scu), 0, sc->memmap[ASPEED_DEV_SCU]);
 
+    /* I2C */
+
+    object_property_set_link(OBJECT(&s->i2c), "dram", OBJECT(&s->sram),
+                             &error_abort);
+    if (!sysbus_realize(SYS_BUS_DEVICE(&s->i2c), errp)) {
+        return;
+    }
+    sysbus_mmio_map(SYS_BUS_DEVICE(&s->i2c), 0, sc->memmap[ASPEED_DEV_I2C]);
+    for (i = 0; i < ASPEED_I2C_GET_CLASS(&s->i2c)->num_busses; i++) {
+        qemu_irq irq = qdev_get_gpio_in(DEVICE(&s->armv7m),
+                                        sc->irqmap[ASPEED_DEV_I2C] + i);
+        /* The AST1030 I2C controller has one IRQ per bus. */
+        sysbus_connect_irq(SYS_BUS_DEVICE(&s->i2c.busses[i]), 0, irq);
+    }
+
     /* LPC */
     if (!sysbus_realize(SYS_BUS_DEVICE(&s->lpc), errp)) {
         return;