qemu/include/hw/char/escc.h
Henrik Carlqvist 6b90a4cdc0 escc: emulate dip switch language layout settings on SUN keyboard
SUN Type 4, 5 and 5c keyboards have dip switches to choose the language layout
of the keyboard. Solaris makes an ioctl to query the value of the dipswitches
and uses that value to select keyboard layout.  Also the SUN bios like the one
in the file ss5.bin uses this value to support at least some keyboard layouts.
However, the OpenBIOS provided with qemu is hardcoded to always use an US
keyboard layout.

Before this patch, qemu allways gave dip switch value 0x21 (US keyboard),
this patch uses a command line switch like
"-global escc.chnA-sunkbd-layout=de" to select dip switch value. A table is
used to lookup values from arguments like:

-global escc.chnA-sunkbd-layout=fr
-global escc.chnA-sunkbd-layout=es

But the patch also accepts numeric dip switch values directly:

-global escc.chnA-sunkbd-layout=0x2b
-global escc.chnA-sunkbd-layout=43

Both values above are the same and select swedish keyboard as explained in
table 3-15 at
https://docs.oracle.com/cd/E19683-01/806-6642/new-43/index.html

Unless you want to do a full Solaris installation but happen to have
access to a Sun bios file, the easiest way to test that the patch works
is to:

qemu-system-sparc -global escc.chnA-sunkbd-layout=sv -bios /path/to/ss5.bin

If you already happen to have a Solaris installation in a qemu disk image
file you can easily try different keyboard layouts after this patch is
applied.

Signed-off-by: Henrik Carlqvist <hc1245@poolhem.se>
Message-Id: <20230623203007.56d3d182.hc981@poolhem.se>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
[MCA edit: update unsigned char to uint8_t, fix spacing issues]
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2023-06-28 10:54:25 +01:00

63 lines
1.3 KiB
C

#ifndef HW_ESCC_H
#define HW_ESCC_H
#include "chardev/char-fe.h"
#include "chardev/char-serial.h"
#include "hw/sysbus.h"
#include "ui/input.h"
#include "qom/object.h"
/* escc.c */
#define TYPE_ESCC "escc"
#define ESCC_SIZE 4
OBJECT_DECLARE_SIMPLE_TYPE(ESCCState, ESCC)
typedef enum {
escc_chn_a, escc_chn_b,
} ESCCChnID;
typedef enum {
escc_serial, escc_kbd, escc_mouse,
} ESCCChnType;
#define ESCC_SERIO_QUEUE_SIZE 256
typedef struct {
uint8_t data[ESCC_SERIO_QUEUE_SIZE];
int rptr, wptr, count;
} ESCCSERIOQueue;
#define ESCC_SERIAL_REGS 16
typedef struct ESCCChannelState {
qemu_irq irq;
uint32_t rxint, txint, rxint_under_svc, txint_under_svc;
struct ESCCChannelState *otherchn;
uint32_t reg;
uint8_t wregs[ESCC_SERIAL_REGS], rregs[ESCC_SERIAL_REGS];
ESCCSERIOQueue queue;
CharBackend chr;
int e0_mode, led_mode, caps_lock_mode, num_lock_mode;
int disabled;
int clock;
uint32_t vmstate_dummy;
ESCCChnID chn; /* this channel, A (base+4) or B (base+0) */
ESCCChnType type;
uint8_t rx, tx;
QemuInputHandlerState *hs;
char *sunkbd_layout;
} ESCCChannelState;
struct ESCCState {
SysBusDevice parent_obj;
struct ESCCChannelState chn[2];
uint32_t it_shift;
bool bit_swap;
MemoryRegion mmio;
uint32_t disabled;
uint32_t frequency;
};
#endif