[PATCH v3 12/22] ppc/ppc405: QOM'ify GPIO

["Cédric Le Goater" <clg@kaod.org>]

The GPIO controller is currently modeled as a simple SysBus device
with a unique memory region.

Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 hw/ppc/ppc405.h    | 21 +++++++++++++++++++
 hw/ppc/ppc405_uc.c | 50 +++++++++++++++++++++-------------------------
 2 files changed, 44 insertions(+), 27 deletions(-)

diff --git a/hw/ppc/ppc405.h b/hw/ppc/ppc405.h
index a5b493d3e7bf..21f6cb358501 100644
--- a/hw/ppc/ppc405.h
+++ b/hw/ppc/ppc405.h
@@ -63,6 +63,26 @@ struct ppc4xx_bd_info_t {
     uint32_t bi_iic_fast[2];
 };
 
+/* GPIO */
+#define TYPE_PPC405_GPIO "ppc405-gpio"
+OBJECT_DECLARE_SIMPLE_TYPE(Ppc405GpioState, PPC405_GPIO);
+struct Ppc405GpioState {
+    SysBusDevice parent_obj;
+
+    MemoryRegion io;
+    uint32_t or;
+    uint32_t tcr;
+    uint32_t osrh;
+    uint32_t osrl;
+    uint32_t tsrh;
+    uint32_t tsrl;
+    uint32_t odr;
+    uint32_t ir;
+    uint32_t rr1;
+    uint32_t isr1h;
+    uint32_t isr1l;
+};
+
 /* On Chip Memory */
 #define TYPE_PPC405_OCM "ppc405-ocm"
 OBJECT_DECLARE_SIMPLE_TYPE(Ppc405OcmState, PPC405_OCM);
@@ -152,6 +172,7 @@ struct Ppc405SoCState {
     Ppc405CpcState cpc;
     Ppc405GptState gpt;
     Ppc405OcmState ocm;
+    Ppc405GpioState gpio;
 };
 
 /* PowerPC 405 core */
diff --git a/hw/ppc/ppc405_uc.c b/hw/ppc/ppc405_uc.c
index 961a7c851d4a..768e6909a831 100644
--- a/hw/ppc/ppc405_uc.c
+++ b/hw/ppc/ppc405_uc.c
@@ -713,23 +713,6 @@ static void ppc405_dma_init(CPUPPCState *env, qemu_irq irqs[4])
 }
 
 /*****************************************************************************/
-/* GPIO */
-typedef struct ppc405_gpio_t ppc405_gpio_t;
-struct ppc405_gpio_t {
-    MemoryRegion io;
-    uint32_t or;
-    uint32_t tcr;
-    uint32_t osrh;
-    uint32_t osrl;
-    uint32_t tsrh;
-    uint32_t tsrl;
-    uint32_t odr;
-    uint32_t ir;
-    uint32_t rr1;
-    uint32_t isr1h;
-    uint32_t isr1l;
-};
-
 static uint64_t ppc405_gpio_read(void *opaque, hwaddr addr, unsigned size)
 {
     trace_ppc405_gpio_read(addr, size);
@@ -748,20 +731,22 @@ static const MemoryRegionOps ppc405_gpio_ops = {
     .endianness = DEVICE_NATIVE_ENDIAN,
 };
 
-static void ppc405_gpio_reset (void *opaque)
+static void ppc405_gpio_realize(DeviceState *dev, Error **errp)
 {
+    Ppc405GpioState *s = PPC405_GPIO(dev);
+    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
+
+    memory_region_init_io(&s->io, OBJECT(s), &ppc405_gpio_ops, s, "gpio",
+                          0x038);
+    sysbus_init_mmio(sbd, &s->io);
 }
 
-static void ppc405_gpio_init(hwaddr base)
+static void ppc405_gpio_class_init(ObjectClass *oc, void *data)
 {
-    ppc405_gpio_t *gpio;
-
-    trace_ppc405_gpio_init(base);
+    DeviceClass *dc = DEVICE_CLASS(oc);
 
-    gpio = g_new0(ppc405_gpio_t, 1);
-    memory_region_init_io(&gpio->io, NULL, &ppc405_gpio_ops, gpio, "pgio", 0x038);
-    memory_region_add_subregion(get_system_memory(), base, &gpio->io);
-    qemu_register_reset(&ppc405_gpio_reset, gpio);
+    dc->realize = ppc405_gpio_realize;
+    dc->user_creatable = false;
 }
 
 /*****************************************************************************/
@@ -1405,6 +1390,8 @@ static void ppc405_soc_instance_init(Object *obj)
     object_initialize_child(obj, "gpt", &s->gpt, TYPE_PPC405_GPT);
 
     object_initialize_child(obj, "ocm", &s->ocm, TYPE_PPC405_OCM);
+
+    object_initialize_child(obj, "gpio", &s->gpio, TYPE_PPC405_GPIO);
 }
 
 static void ppc405_soc_realize(DeviceState *dev, Error **errp)
@@ -1477,8 +1464,12 @@ static void ppc405_soc_realize(DeviceState *dev, Error **errp)
     /* I2C controller */
     sysbus_create_simple(TYPE_PPC4xx_I2C, 0xef600500,
                          qdev_get_gpio_in(s->uic, 2));
+
     /* GPIO */
-    ppc405_gpio_init(0xef600700);
+    if (!sysbus_realize(SYS_BUS_DEVICE(&s->gpio), errp)) {
+        return;
+    }
+    sysbus_mmio_map(SYS_BUS_DEVICE(&s->gpio), 0, 0xef600700);
 
     /* Serial ports */
     if (serial_hd(0) != NULL) {
@@ -1540,6 +1531,11 @@ static void ppc405_soc_class_init(ObjectClass *oc, void *data)
 
 static const TypeInfo ppc405_types[] = {
     {
+        .name           = TYPE_PPC405_GPIO,
+        .parent         = TYPE_SYS_BUS_DEVICE,
+        .instance_size  = sizeof(Ppc405GpioState),
+        .class_init     = ppc405_gpio_class_init,
+    }, {
         .name           = TYPE_PPC405_OCM,
         .parent         = TYPE_PPC4xx_DCR_DEVICE,
         .instance_size  = sizeof(Ppc405OcmState),
-- 
2.37.1