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SubjectRe: [PATCH] gamecon (added support for Sega Saturn controller), kernel 2.4.20
Thank you very much for your reply.

Vojtech Pavlik <vojtech@suse.cz> wrote:
> Two in some cases. And that's the number of Saturn pads supported by
> your patch as well, right?
I am sorry. Suggested by you, I find DB9_MULTI_0802_2 on db9.c now. I
will try to hack db9.c. DPP compatible JOY-DB9.C patch previously exists.
(http://www.self-core.org/~kaoru-k/pub/joy_db9_dpp_saturn_2.2.17.patch)
Below patch is preliminaly support for ninth button on db9.c compatible
interface. I have not tested if it works or not. (I have no interface
nor knowledge of 0x37a command register.)

> Gamecon is based on that it uses one input line per device. The Saturn
> needs more than one (four?).
But using gamecon.c might be the easiest way to support more (12 pads
with two multitap on each connector, in maximum) pads, although satun
pad can not live with other pads in my gamecon.c patch.

[Multitap and DirectPad Pro Interface]
+-----------+
| |
| Linux BOX |
| |(1 LPT port)
+-----------+
|
|
|
+-----+
| DPP |(2 connectors)
+-----+
/ \
/ \
/ \
+-----+ +-----+
pad1|multi|pad6 pad7|multi|pad12 (12 gamepads)
pad2| tap |pad5 pad8| tap |pad11
+-----+ +-----+
pad3 pad4 pad9 pad10
(I have only tested with first 6 pad with a multitap.)


--- db9.c.orig Thu Sep 13 07:34:06 2001
+++ db9.c Tue Jan 28 20:18:22 2003
@@ -70,9 +70,9 @@
#define DB9_NOSELECT 0x08

#define DB9_SATURN0 0x00
-#define DB9_SATURN1 0x02
-#define DB9_SATURN2 0x04
-#define DB9_SATURN3 0x06
+#define DB9_SATURN1 (DB9_SATURN0 ^ 0x02)
+#define DB9_SATURN2 (DB9_SATURN0 ^ 0x04)
+#define DB9_SATURN3 (DB9_SATURN1 ^ 0x04)

#define DB9_GENESIS6_DELAY 14
#define DB9_REFRESH_TIME HZ/100
@@ -95,7 +95,7 @@
static short db9_genesis_btn[] = { BTN_START, BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_MODE };
static short db9_cd32_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START };

-static char db9_buttons[DB9_MAX_PAD] = { 0, 1, 2, 4, 0, 6, 8, 8, 1, 1, 7 };
+static char db9_buttons[DB9_MAX_PAD] = { 0, 1, 2, 4, 0, 6, 8, 9, 1, 1, 7 };
static short *db9_btn[DB9_MAX_PAD] = { NULL, db9_multi_btn, db9_multi_btn, db9_genesis_btn, NULL, db9_genesis_btn,
db9_genesis_btn, db9_cd32_btn, db9_multi_btn, db9_multi_btn, db9_cd32_btn };
static char *db9_name[DB9_MAX_PAD] = { NULL, "Multisystem joystick", "Multisystem joystick (2 fire)", "Genesis pad",
@@ -222,27 +222,32 @@

case DB9_SATURN_PAD:

- parport_write_control(port, DB9_SATURN0);
+ parport_write_control(port, DB9_SATURN0); /* low - low */
data = parport_read_data(port);

- input_report_key(dev, BTN_Y, ~data & DB9_LEFT);
- input_report_key(dev, BTN_Z, ~data & DB9_DOWN);
- input_report_key(dev, BTN_TL, ~data & DB9_UP);
+ input_report_key(dev, BTN_X, ~data & DB9_LEFT);
+ input_report_key(dev, BTN_Y, ~data & DB9_DOWN);
+ input_report_key(dev, BTN_Z, ~data & DB9_UP);
input_report_key(dev, BTN_TR, ~data & DB9_RIGHT);

- parport_write_control(port, DB9_SATURN2);
+ parport_write_control(port, DB9_SATURN2); /* high - low */
data = parport_read_data(port);

input_report_abs(dev, ABS_X, (data & DB9_RIGHT ? 0 : 1) - (data & DB9_LEFT ? 0 : 1));
input_report_abs(dev, ABS_Y, (data & DB9_DOWN ? 0 : 1) - (data & DB9_UP ? 0 : 1));

- parport_write_control(port, DB9_NORMAL);
+ parport_write_control(port, DB9_SATURN1); /* low - high */
data = parport_read_data(port);

input_report_key(dev, BTN_A, ~data & DB9_LEFT);
input_report_key(dev, BTN_B, ~data & DB9_UP);
input_report_key(dev, BTN_C, ~data & DB9_DOWN);
- input_report_key(dev, BTN_X, ~data & DB9_RIGHT);
+ input_report_key(dev, BTN_START, ~data & DB9_RIGHT);
+
+ parport_write_control(port, DB9_SATURN3); /* high - high */
+ data = parport_read_data(port);
+
+ input_report_key(dev, BTN_TL, ~data & DB9_RIGHT);
break;

case DB9_CD32_PAD:

yokota

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