[Qemu-devel] [RFC 02/10] fdc: add default drive type option

[John Snow <jsnow@redhat.com>]

We want to change the current default drive type,
but to be kind, we need to allow users to specify
the old drive type somehow.

Signed-off-by: John Snow <jsnow@redhat.com>
---
 hw/block/fdc.c               | 13 +++++++++++++
 hw/core/qdev-properties.c    | 12 ++++++++++++
 include/hw/block/fdc.h       |  7 +------
 include/hw/qdev-properties.h |  1 +
 qapi/block.json              | 15 +++++++++++++++
 5 files changed, 42 insertions(+), 6 deletions(-)

diff --git a/hw/block/fdc.c b/hw/block/fdc.c
index cdf9e09..1023a01 100644
--- a/hw/block/fdc.c
+++ b/hw/block/fdc.c
@@ -67,6 +67,8 @@ typedef struct FDFormat {
     FDriveRate rate;
 } FDFormat;
 
+#define FDRIVE_DEFAULT FDRIVE_DRV_144
+
 static const FDFormat fd_formats[] = {
     /* First entry is default format */
     /* 1.44 MB 3"1/2 floppy disks */
@@ -578,6 +580,9 @@ struct FDCtrl {
     /* Timers state */
     uint8_t timer0;
     uint8_t timer1;
+
+    FDriveType defaultA;
+    FDriveType defaultB;
 };
 
 #define TYPE_SYSBUS_FDC "base-sysbus-fdc"
@@ -2423,6 +2428,10 @@ static Property isa_fdc_properties[] = {
     DEFINE_PROP_DRIVE("driveB", FDCtrlISABus, state.drives[1].blk),
     DEFINE_PROP_BIT("check_media_rate", FDCtrlISABus, state.check_media_rate,
                     0, true),
+    DEFINE_PROP_DEFAULT("defaultA", FDCtrlISABus, state.defaultA,
+                        FDRIVE_DEFAULT, qdev_prop_fdc_drive_type, FDriveType),
+    DEFINE_PROP_DEFAULT("defaultB", FDCtrlISABus, state.defaultB,
+                        FDRIVE_DEFAULT, qdev_prop_fdc_drive_type, FDriveType),
     DEFINE_PROP_END_OF_LIST(),
 };
 
@@ -2471,6 +2480,10 @@ static const VMStateDescription vmstate_sysbus_fdc ={
 static Property sysbus_fdc_properties[] = {
     DEFINE_PROP_DRIVE("driveA", FDCtrlSysBus, state.drives[0].blk),
     DEFINE_PROP_DRIVE("driveB", FDCtrlSysBus, state.drives[1].blk),
+    DEFINE_PROP_DEFAULT("defaultA", FDCtrlSysBus, state.defaultA,
+                        FDRIVE_DEFAULT, qdev_prop_fdc_drive_type, FDriveType),
+    DEFINE_PROP_DEFAULT("defaultB", FDCtrlSysBus, state.defaultB,
+                        FDRIVE_DEFAULT, qdev_prop_fdc_drive_type, FDriveType),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c
index 47c1e8f..7ff8030 100644
--- a/hw/core/qdev-properties.c
+++ b/hw/core/qdev-properties.c
@@ -7,6 +7,7 @@
 #include "net/hub.h"
 #include "qapi/visitor.h"
 #include "sysemu/char.h"
+#include "hw/block/fdc.h"
 
 void qdev_prop_set_after_realize(DeviceState *dev, const char *name,
                                   Error **errp)
@@ -543,6 +544,17 @@ PropertyInfo qdev_prop_bios_chs_trans = {
     .set = set_enum,
 };
 
+/* --- FDC default drive types */
+
+PropertyInfo qdev_prop_fdc_drive_type = {
+    .name = "FdcDriveType",
+    .description = "FDC drive type, "
+                   "none/120/144/288",
+    .enum_table = FDRIVE_DRV_lookup,
+    .get = get_enum,
+    .set = set_enum
+};
+
 /* --- pci address --- */
 
 /*
diff --git a/include/hw/block/fdc.h b/include/hw/block/fdc.h
index d48b2f8..f727027 100644
--- a/include/hw/block/fdc.h
+++ b/include/hw/block/fdc.h
@@ -6,12 +6,7 @@
 /* fdc.c */
 #define MAX_FD 2
 
-typedef enum FDriveType {
-    FDRIVE_DRV_144  = 0x00,   /* 1.44 MB 3"5 drive      */
-    FDRIVE_DRV_288  = 0x01,   /* 2.88 MB 3"5 drive      */
-    FDRIVE_DRV_120  = 0x02,   /* 1.2  MB 5"25 drive     */
-    FDRIVE_DRV_NONE = 0x03,   /* No drive connected     */
-} FDriveType;
+typedef FDRIVE_DRV FDriveType;
 
 #define TYPE_ISA_FDC "isa-fdc"
 
diff --git a/include/hw/qdev-properties.h b/include/hw/qdev-properties.h
index 0cfff1c..0872b41 100644
--- a/include/hw/qdev-properties.h
+++ b/include/hw/qdev-properties.h
@@ -20,6 +20,7 @@ extern PropertyInfo qdev_prop_ptr;
 extern PropertyInfo qdev_prop_macaddr;
 extern PropertyInfo qdev_prop_losttickpolicy;
 extern PropertyInfo qdev_prop_bios_chs_trans;
+extern PropertyInfo qdev_prop_fdc_drive_type;
 extern PropertyInfo qdev_prop_drive;
 extern PropertyInfo qdev_prop_netdev;
 extern PropertyInfo qdev_prop_vlan;
diff --git a/qapi/block.json b/qapi/block.json
index aad645c..0c747a1 100644
--- a/qapi/block.json
+++ b/qapi/block.json
@@ -40,6 +40,21 @@
   'data': ['auto', 'none', 'lba', 'large', 'rechs']}
 
 ##
+# FDRIVE_DRV:
+#
+# Type of Floppy drive to be emulated by the Floppy Disk Controller.
+#
+# @144:  1.44MB 3.5" drive
+# @288:  2.88MB 3.5" drive
+# @120:  1.5MB 5.25" drive
+# @none: No drive connected
+#
+# Since: 2.4
+##
+{ 'enum': 'FDRIVE_DRV',
+  'data': ['144', '288', '120', 'none']}
+
+##
 # @BlockdevSnapshotInternal
 #
 # @device: the name of the device to generate the snapshot from
-- 
2.1.0