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fdc: Add fallback option

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Currently, QEMU chooses a drive type automatically based on the inserted
media. If there is no disk inserted, it chooses a 1.44MB drive type.

Change this behavior to be configurable, but leave it defaulted to 1.44.

This is not earnestly intended to be used by a user or a management
library, but rather exists so that pre-2.6 board types can configure it
to be a legacy value.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 1453495865-9649-8-git-send-email-jsnow@redhat.com
This commit is contained in:
John Snow 2016-01-22 15:51:00 -05:00
parent d5d47efc85
commit a73275dd6f
3 changed files with 35 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
hw/block/fdc.c
View File

@ -154,6 +154,9 @@ typedef struct FDrive {
bool media_validated; /* Have we validated the media? */
} FDrive;
static FloppyDriveType get_fallback_drive_type(FDrive *drv);
static void fd_init(FDrive *drv)
{
/* Drive */
@ -314,8 +317,7 @@ static void pick_drive_type(FDrive *drv)
if (pick_geometry(drv) == 0) {
drv->drive = drv->disk;
} else {
/* Legacy behavior: default to 1.44MB floppy */
drv->drive = FLOPPY_DRIVE_TYPE_144;
drv->drive = get_fallback_drive_type(drv);
}
}
@ -598,11 +600,17 @@ struct FDCtrl {
FDrive drives[MAX_FD];
int reset_sensei;
uint32_t check_media_rate;
FloppyDriveType fallback; /* type=auto failure fallback */
/* Timers state */
uint8_t timer0;
uint8_t timer1;
};
static FloppyDriveType get_fallback_drive_type(FDrive *drv)
{
return drv->fdctrl->fallback;
}
#define TYPE_SYSBUS_FDC "base-sysbus-fdc"
#define SYSBUS_FDC(obj) OBJECT_CHECK(FDCtrlSysBus, (obj), TYPE_SYSBUS_FDC)
@ -2338,6 +2346,10 @@ static void fdctrl_realize_common(FDCtrl *fdctrl, Error **errp)
int i, j;
static int command_tables_inited = 0;
if (fdctrl->fallback == FLOPPY_DRIVE_TYPE_AUTO) {
error_setg(errp, "Cannot choose a fallback FDrive type of 'auto'");
}
/* Fill 'command_to_handler' lookup table */
if (!command_tables_inited) {
command_tables_inited = 1;
@ -2463,6 +2475,9 @@ 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("fallback", FDCtrlISABus, state.fallback,
FLOPPY_DRIVE_TYPE_144, qdev_prop_fdc_drive_type,
FloppyDriveType),
DEFINE_PROP_END_OF_LIST(),
};
@ -2511,6 +2526,9 @@ 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("fallback", FDCtrlISABus, state.fallback,
FLOPPY_DRIVE_TYPE_144, qdev_prop_fdc_drive_type,
FloppyDriveType),
DEFINE_PROP_END_OF_LIST(),
};
@ -2531,6 +2549,9 @@ static const TypeInfo sysbus_fdc_info = {
static Property sun4m_fdc_properties[] = {
DEFINE_PROP_DRIVE("drive", FDCtrlSysBus, state.drives[0].blk),
DEFINE_PROP_DEFAULT("fallback", FDCtrlISABus, state.fallback,
FLOPPY_DRIVE_TYPE_144, qdev_prop_fdc_drive_type,
FloppyDriveType),
DEFINE_PROP_END_OF_LIST(),
};

11
hw/core/qdev-properties.c
View File

@ -541,6 +541,17 @@ 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, "
"144/288/120/none/auto",
.enum_table = FloppyDriveType_lookup,
.get = get_enum,
.set = set_enum
};
/* --- pci address --- */
/*

1
include/hw/qdev-properties.h
View File

@ -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;