realview: break out versatile i2c controller code

The versatile i2c controller implementation was separated to
its own file called versatile_i2c.c. This is done as a preparation
for adding i2c support to the versatilepb board.

Signed-off-by: Oskar Andero <oskar.andero@gmail.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Makefile.target

@@ -364,6 +364,7 @@ endif
 obj-arm-y = integratorcp.o versatilepb.o arm_pic.o arm_timer.o
 obj-arm-y += arm_boot.o pl011.o pl031.o pl050.o pl080.o pl110.o pl181.o pl190.o
 obj-arm-y += versatile_pci.o
+obj-arm-y += versatile_i2c.o
 obj-arm-y += cadence_uart.o
 obj-arm-y += cadence_ttc.o
 obj-arm-y += cadence_gem.o

hw/realview.c

@@ -15,91 +15,13 @@
 #include "net.h"
 #include "sysemu.h"
 #include "boards.h"
-#include "bitbang_i2c.h"
+#include "i2c.h"
 #include "blockdev.h"
 #include "exec-memory.h"
 
 #define SMP_BOOT_ADDR 0xe0000000
 #define SMP_BOOTREG_ADDR 0x10000030
 
-typedef struct {
-    SysBusDevice busdev;
-    MemoryRegion iomem;
-    bitbang_i2c_interface *bitbang;
-    int out;
-    int in;
-} RealViewI2CState;
-
-static uint64_t realview_i2c_read(void *opaque, target_phys_addr_t offset,
-                                  unsigned size)
-{
-    RealViewI2CState *s = (RealViewI2CState *)opaque;
-
-    if (offset == 0) {
-        return (s->out & 1) | (s->in << 1);
-    } else {
-        hw_error("realview_i2c_read: Bad offset 0x%x\n", (int)offset);
-        return -1;
-    }
-}
-
-static void realview_i2c_write(void *opaque, target_phys_addr_t offset,
-                               uint64_t value, unsigned size)
-{
-    RealViewI2CState *s = (RealViewI2CState *)opaque;
-
-    switch (offset) {
-    case 0:
-        s->out |= value & 3;
-        break;
-    case 4:
-        s->out &= ~value;
-        break;
-    default:
-        hw_error("realview_i2c_write: Bad offset 0x%x\n", (int)offset);
-    }
-    bitbang_i2c_set(s->bitbang, BITBANG_I2C_SCL, (s->out & 1) != 0);
-    s->in = bitbang_i2c_set(s->bitbang, BITBANG_I2C_SDA, (s->out & 2) != 0);
-}
-
-static const MemoryRegionOps realview_i2c_ops = {
-    .read = realview_i2c_read,
-    .write = realview_i2c_write,
-    .endianness = DEVICE_NATIVE_ENDIAN,
-};
-
-static int realview_i2c_init(SysBusDevice *dev)
-{
-    RealViewI2CState *s = FROM_SYSBUS(RealViewI2CState, dev);
-    i2c_bus *bus;
-
-    bus = i2c_init_bus(&dev->qdev, "i2c");
-    s->bitbang = bitbang_i2c_init(bus);
-    memory_region_init_io(&s->iomem, &realview_i2c_ops, s,
-                          "realview-i2c", 0x1000);
-    sysbus_init_mmio(dev, &s->iomem);
-    return 0;
-}
-
-static void realview_i2c_class_init(ObjectClass *klass, void *data)
-{
-    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
-
-    k->init = realview_i2c_init;
-}
-
-static TypeInfo realview_i2c_info = {
-    .name          = "realview_i2c",
-    .parent        = TYPE_SYS_BUS_DEVICE,
-    .instance_size = sizeof(RealViewI2CState),
-    .class_init    = realview_i2c_class_init,
-};
-
-static void realview_register_types(void)
-{
-    type_register_static(&realview_i2c_info);
-}
-
 /* Board init.  */
 
 static struct arm_boot_info realview_binfo = {
@@ -328,7 +250,7 @@ static void realview_init(ram_addr_t ram_size,
         }
     }
 
-    dev = sysbus_create_simple("realview_i2c", 0x10002000, NULL);
+    dev = sysbus_create_simple("versatile_i2c", 0x10002000, NULL);
     i2c = (i2c_bus *)qdev_get_child_bus(dev, "i2c");
     i2c_create_slave(i2c, "ds1338", 0x68);
 
@@ -492,4 +414,3 @@ static void realview_machine_init(void)
 }
 
 machine_init(realview_machine_init);
-type_init(realview_register_types)

hw/versatile_i2c.c

@@ -0,0 +1,105 @@
+/*
+ * ARM Versatile I2C controller
+ *
+ * Copyright (c) 2006-2007 CodeSourcery.
+ * Copyright (c) 2012 Oskar Andero <oskar.andero@gmail.com>
+ *
+ * This file is derived from hw/realview.c by Paul Brook
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "sysbus.h"
+#include "bitbang_i2c.h"
+
+typedef struct {
+    SysBusDevice busdev;
+    MemoryRegion iomem;
+    bitbang_i2c_interface *bitbang;
+    int out;
+    int in;
+} VersatileI2CState;
+
+static uint64_t versatile_i2c_read(void *opaque, target_phys_addr_t offset,
+                                   unsigned size)
+{
+    VersatileI2CState *s = (VersatileI2CState *)opaque;
+
+    if (offset == 0) {
+        return (s->out & 1) | (s->in << 1);
+    } else {
+        hw_error("%s: Bad offset 0x%x\n", __func__, (int)offset);
+        return -1;
+    }
+}
+
+static void versatile_i2c_write(void *opaque, target_phys_addr_t offset,
+                                uint64_t value, unsigned size)
+{
+    VersatileI2CState *s = (VersatileI2CState *)opaque;
+
+    switch (offset) {
+    case 0:
+        s->out |= value & 3;
+        break;
+    case 4:
+        s->out &= ~value;
+        break;
+    default:
+        hw_error("%s: Bad offset 0x%x\n", __func__, (int)offset);
+    }
+    bitbang_i2c_set(s->bitbang, BITBANG_I2C_SCL, (s->out & 1) != 0);
+    s->in = bitbang_i2c_set(s->bitbang, BITBANG_I2C_SDA, (s->out & 2) != 0);
+}
+
+static const MemoryRegionOps versatile_i2c_ops = {
+    .read = versatile_i2c_read,
+    .write = versatile_i2c_write,
+    .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static int versatile_i2c_init(SysBusDevice *dev)
+{
+    VersatileI2CState *s = FROM_SYSBUS(VersatileI2CState, dev);
+    i2c_bus *bus;
+
+    bus = i2c_init_bus(&dev->qdev, "i2c");
+    s->bitbang = bitbang_i2c_init(bus);
+    memory_region_init_io(&s->iomem, &versatile_i2c_ops, s,
+                          "versatile_i2c", 0x1000);
+    sysbus_init_mmio(dev, &s->iomem);
+    return 0;
+}
+
+static void versatile_i2c_class_init(ObjectClass *klass, void *data)
+{
+    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
+
+    k->init = versatile_i2c_init;
+}
+
+static const TypeInfo versatile_i2c_info = {
+    .name          = "versatile_i2c",
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(VersatileI2CState),
+    .class_init    = versatile_i2c_class_init,
+};
+
+static void versatile_i2c_register_types(void)
+{
+    type_register_static(&versatile_i2c_info);
+}
+
+type_init(versatile_i2c_register_types)