hw/arm/fsl-imx8mp: Add USDHC storage controllers

The USDHC emulation allows for running real-world images such as those generated
by Buildroot. Convert the board documentation accordingly instead of running a
Linux kernel with ephemeral storage.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Message-id: 20250223114708.1780-8-shentey@gmail.com
[PMM: drop 'static const' from usdhc_table[] for GCC 7.5]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 28 insertions, 0 deletions

diff --git a/hw/arm/fsl-imx8mp.c b/hw/arm/fsl-imx8mp.c
index 18c9c54..da9eaeb 100644
--- a/hw/arm/fsl-imx8mp.c
+++ b/hw/arm/fsl-imx8mp.c
@@ -207,6 +207,11 @@ static void fsl_imx8mp_init(Object *obj)
         g_autofree char *name = g_strdup_printf("uart%d", i + 1);
         object_initialize_child(obj, name, &s->uart[i], TYPE_IMX_SERIAL);
     }
+
+    for (i = 0; i < FSL_IMX8MP_NUM_USDHCS; i++) {
+        g_autofree char *name = g_strdup_printf("usdhc%d", i + 1);
+        object_initialize_child(obj, name, &s->usdhc[i], TYPE_IMX_USDHC);
+    }
 }
 
 static void fsl_imx8mp_realize(DeviceState *dev, Error **errp)
@@ -346,6 +351,28 @@ static void fsl_imx8mp_realize(DeviceState *dev, Error **errp)
                            qdev_get_gpio_in(gicdev, serial_table[i].irq));
     }
 
+    /* USDHCs */
+    for (i = 0; i < FSL_IMX8MP_NUM_USDHCS; i++) {
+        struct {
+            hwaddr addr;
+            unsigned int irq;
+        } usdhc_table[FSL_IMX8MP_NUM_USDHCS] = {
+            { fsl_imx8mp_memmap[FSL_IMX8MP_USDHC1].addr, FSL_IMX8MP_USDHC1_IRQ },
+            { fsl_imx8mp_memmap[FSL_IMX8MP_USDHC2].addr, FSL_IMX8MP_USDHC2_IRQ },
+            { fsl_imx8mp_memmap[FSL_IMX8MP_USDHC3].addr, FSL_IMX8MP_USDHC3_IRQ },
+        };
+
+        object_property_set_uint(OBJECT(&s->usdhc[i]), "vendor",
+                                 SDHCI_VENDOR_IMX, &error_abort);
+        if (!sysbus_realize(SYS_BUS_DEVICE(&s->usdhc[i]), errp)) {
+            return;
+        }
+
+        sysbus_mmio_map(SYS_BUS_DEVICE(&s->usdhc[i]), 0, usdhc_table[i].addr);
+        sysbus_connect_irq(SYS_BUS_DEVICE(&s->usdhc[i]), 0,
+                           qdev_get_gpio_in(gicdev, usdhc_table[i].irq));
+    }
+
     /* SNVS */
     if (!sysbus_realize(SYS_BUS_DEVICE(&s->snvs), errp)) {
         return;
@@ -363,6 +390,7 @@ static void fsl_imx8mp_realize(DeviceState *dev, Error **errp)
         case FSL_IMX8MP_RAM:
         case FSL_IMX8MP_SNVS_HP:
         case FSL_IMX8MP_UART1 ... FSL_IMX8MP_UART4:
+        case FSL_IMX8MP_USDHC1 ... FSL_IMX8MP_USDHC3:
             /* device implemented and treated above */
             break;