hw/arm: Connect BSC to BCM2835 board as I2C0, I2C1 and I2C2

BCM2835 has three I2C controllers. All of them share the same interrupt line.

Signed-off-by: Rayhan Faizel <rayhan.faizel@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20240224191038.2409945-3-rayhan.faizel@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 42 insertions, 3 deletions

diff --git a/hw/arm/bcm2835_peripherals.c b/hw/arm/bcm2835_peripherals.c
index a0bbe76..1695d8b 100644
--- a/hw/arm/bcm2835_peripherals.c
+++ b/hw/arm/bcm2835_peripherals.c
@@ -30,6 +30,9 @@
 #define SEPARATE_DMA_IRQ_MAX 10
 #define ORGATED_DMA_IRQ_COUNT 4
 
+/* All three I2C controllers share the same IRQ */
+#define ORGATED_I2C_IRQ_COUNT 3
+
 void create_unimp(BCMSocPeripheralBaseState *ps,
                   UnimplementedDeviceState *uds,
                   const char *name, hwaddr ofs, hwaddr size)
@@ -157,6 +160,19 @@ static void raspi_peripherals_base_init(Object *obj)
     /* SPI */
     object_initialize_child(obj, "bcm2835-spi0", &s->spi[0],
                             TYPE_BCM2835_SPI);
+
+    /* I2C */
+    object_initialize_child(obj, "bcm2835-i2c0", &s->i2c[0],
+                            TYPE_BCM2835_I2C);
+    object_initialize_child(obj, "bcm2835-i2c1", &s->i2c[1],
+                            TYPE_BCM2835_I2C);
+    object_initialize_child(obj, "bcm2835-i2c2", &s->i2c[2],
+                            TYPE_BCM2835_I2C);
+
+    object_initialize_child(obj, "orgated-i2c-irq",
+                            &s->orgated_i2c_irq, TYPE_OR_IRQ);
+    object_property_set_int(OBJECT(&s->orgated_i2c_irq), "num-lines",
+                            ORGATED_I2C_IRQ_COUNT, &error_abort);
 }
 
 static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
@@ -453,14 +469,37 @@ void bcm_soc_peripherals_common_realize(DeviceState *dev, Error **errp)
                                               BCM2835_IC_GPU_IRQ,
                                               INTERRUPT_SPI));
 
+    /* I2C */
+    for (n = 0; n < 3; n++) {
+        if (!sysbus_realize(SYS_BUS_DEVICE(&s->i2c[n]), errp)) {
+            return;
+        }
+    }
+
+    memory_region_add_subregion(&s->peri_mr, BSC0_OFFSET,
+            sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->i2c[0]), 0));
+    memory_region_add_subregion(&s->peri_mr, BSC1_OFFSET,
+            sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->i2c[1]), 0));
+    memory_region_add_subregion(&s->peri_mr, BSC2_OFFSET,
+            sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->i2c[2]), 0));
+
+    if (!qdev_realize(DEVICE(&s->orgated_i2c_irq), NULL, errp)) {
+        return;
+    }
+    for (n = 0; n < ORGATED_I2C_IRQ_COUNT; n++) {
+        sysbus_connect_irq(SYS_BUS_DEVICE(&s->i2c[n]), 0,
+                           qdev_get_gpio_in(DEVICE(&s->orgated_i2c_irq), n));
+    }
+    qdev_connect_gpio_out(DEVICE(&s->orgated_i2c_irq), 0,
+                          qdev_get_gpio_in_named(DEVICE(&s->ic),
+                                                 BCM2835_IC_GPU_IRQ,
+                                                 INTERRUPT_I2C));
+
     create_unimp(s, &s->txp, "bcm2835-txp", TXP_OFFSET, 0x1000);
     create_unimp(s, &s->armtmr, "bcm2835-sp804", ARMCTRL_TIMER0_1_OFFSET, 0x40);
     create_unimp(s, &s->i2s, "bcm2835-i2s", I2S_OFFSET, 0x100);
     create_unimp(s, &s->smi, "bcm2835-smi", SMI_OFFSET, 0x100);
     create_unimp(s, &s->bscsl, "bcm2835-spis", BSC_SL_OFFSET, 0x100);
-    create_unimp(s, &s->i2c[0], "bcm2835-i2c0", BSC0_OFFSET, 0x20);
-    create_unimp(s, &s->i2c[1], "bcm2835-i2c1", BSC1_OFFSET, 0x20);
-    create_unimp(s, &s->i2c[2], "bcm2835-i2c2", BSC2_OFFSET, 0x20);
     create_unimp(s, &s->otp, "bcm2835-otp", OTP_OFFSET, 0x80);
     create_unimp(s, &s->dbus, "bcm2835-dbus", DBUS_OFFSET, 0x8000);
     create_unimp(s, &s->ave0, "bcm2835-ave0", AVE0_OFFSET, 0x8000);