MAX78000: Add UART to SOC

This commit adds UART to max78000_soc

Signed-off-by: Jackson Donaldson <jcksn@duck.com>
Reviewed-by: Peter Maydell <petermaydell@linaro.org>
Message-id: 20250704223239.248781-6-jcksn@duck.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 27 insertions, 4 deletions

diff --git a/hw/arm/max78000_soc.c b/hw/arm/max78000_soc.c
index 0c83b08..2f93ab8 100644
--- a/hw/arm/max78000_soc.c
+++ b/hw/arm/max78000_soc.c
@@ -18,6 +18,10 @@
 #include "hw/misc/unimp.h"
 
 static const uint32_t max78000_icc_addr[] = {0x4002a000, 0x4002a800};
+static const uint32_t max78000_uart_addr[] = {0x40042000, 0x40043000,
+                                              0x40044000};
+
+static const int max78000_uart_irq[] = {14, 15, 34};
 
 static void max78000_soc_initfn(Object *obj)
 {
@@ -31,6 +35,12 @@ static void max78000_soc_initfn(Object *obj)
         object_initialize_child(obj, name, &s->icc[i], TYPE_MAX78000_ICC);
     }
 
+    for (i = 0; i < MAX78000_NUM_UART; i++) {
+        g_autofree char *name = g_strdup_printf("uart%d", i);
+        object_initialize_child(obj, name, &s->uart[i],
+                                TYPE_MAX78000_UART);
+    }
+
     s->sysclk = qdev_init_clock_in(DEVICE(s), "sysclk", NULL, NULL, 0);
 }
 
@@ -39,6 +49,7 @@ static void max78000_soc_realize(DeviceState *dev_soc, Error **errp)
     MAX78000State *s = MAX78000_SOC(dev_soc);
     MemoryRegion *system_memory = get_system_memory();
     DeviceState *dev, *armv7m;
+    SysBusDevice *busdev;
     Error *err = NULL;
     int i;
 
@@ -89,6 +100,19 @@ static void max78000_soc_realize(DeviceState *dev_soc, Error **errp)
         sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, max78000_icc_addr[i]);
     }
 
+    for (i = 0; i < MAX78000_NUM_UART; i++) {
+        dev = DEVICE(&(s->uart[i]));
+        qdev_prop_set_chr(dev, "chardev", serial_hd(i));
+        if (!sysbus_realize(SYS_BUS_DEVICE(&s->uart[i]), errp)) {
+            return;
+        }
+
+        busdev = SYS_BUS_DEVICE(dev);
+        sysbus_mmio_map(busdev, 0, max78000_uart_addr[i]);
+        sysbus_connect_irq(busdev, 0, qdev_get_gpio_in(armv7m,
+                                                       max78000_uart_irq[i]));
+    }
+
     create_unimplemented_device("globalControl",        0x40000000, 0x400);
     create_unimplemented_device("systemInterface",      0x40000400, 0x400);
     create_unimplemented_device("functionControl",      0x40000800, 0x400);
@@ -127,10 +151,6 @@ static void max78000_soc_realize(DeviceState *dev_soc, Error **errp)
     create_unimplemented_device("oneWireMaster",        0x4003d000, 0x1000);
     create_unimplemented_device("semaphore",            0x4003e000, 0x1000);
 
-    create_unimplemented_device("uart0",                0x40042000, 0x1000);
-    create_unimplemented_device("uart1",                0x40043000, 0x1000);
-    create_unimplemented_device("uart2",                0x40044000, 0x1000);
-
     create_unimplemented_device("spi1",                 0x40046000, 0x2000);
     create_unimplemented_device("trng",                 0x4004d000, 0x1000);
     create_unimplemented_device("i2s",                  0x40060000, 0x1000);
diff --git a/include/hw/arm/max78000_soc.h b/include/hw/arm/max78000_soc.h
index 27b506d..57894f0 100644
--- a/include/hw/arm/max78000_soc.h
+++ b/include/hw/arm/max78000_soc.h
@@ -12,6 +12,7 @@
 #include "hw/or-irq.h"
 #include "hw/arm/armv7m.h"
 #include "hw/misc/max78000_icc.h"
+#include "hw/char/max78000_uart.h"
 #include "qom/object.h"
 
 #define TYPE_MAX78000_SOC "max78000-soc"
@@ -24,6 +25,7 @@ OBJECT_DECLARE_SIMPLE_TYPE(MAX78000State, MAX78000_SOC)
 
 /* The MAX78k has 2 instruction caches; only icc0 matters, icc1 is for RISC */
 #define MAX78000_NUM_ICC 2
+#define MAX78000_NUM_UART 3
 
 struct MAX78000State {
     SysBusDevice parent_obj;
@@ -34,6 +36,7 @@ struct MAX78000State {
     MemoryRegion flash;
 
     Max78000IccState icc[MAX78000_NUM_ICC];
+    Max78000UartState uart[MAX78000_NUM_UART];
 
     Clock *sysclk;
 };