* Re: gpm-support for serial DECstation mouse (VSXXX-AA)
2001-07-11 21:05 gpm-support for serial DECstation mouse (VSXXX-AA) Karsten Merker
2001-07-12 2:16 ` mipsel rpm jeff_lee
@ 2001-07-12 12:05 ` Maciej W. Rozycki
2001-07-16 20:17 ` Karsten Merker
1 sibling, 1 reply; 5+ messages in thread
From: Maciej W. Rozycki @ 2001-07-12 12:05 UTC (permalink / raw)
To: Karsten Merker; +Cc: linux-mips, debian-mips
On Wed, 11 Jul 2001, Karsten Merker wrote:
> I have added support for the DEC VSXXX-AA mouse (serial mouse used on
> the DECstation 5000/xxx systems) to the Debian gpm package. An
I can't test the patch as I don't have a suitable console device.
However, I can already see a problem with the protocol identification
masks. Also it's worth mentioning the VSXXX-GA mouse as well (it might
not be obvious to everyone the mice are compatible) and the mice are not
just DECstation-specific. I think it's the right place to fully specify
the protocol used -- specs are not widely available and chances are they
might get lost if not cast in stone somewhere.
Following is a patch against your version -- please consider the changes
I propose.
Maciej
--
+ Maciej W. Rozycki, Technical University of Gdansk, Poland +
+--------------------------------------------------------------+
+ e-mail: macro@ds2.pg.gda.pl, PGP key available +
gpm-1.19.3-vsxxxaa.patch
diff -up --recursive --new-file gpm-1.19.3.macro/mice.c gpm-1.19.3/mice.c
--- gpm-1.19.3.macro/mice.c Wed Jul 11 18:12:59 2001
+++ gpm-1.19.3/mice.c Thu Jul 12 00:33:12 2001
@@ -1281,8 +1281,10 @@ static int M_wp(Gpm_Event *state, unsig
}
-/* DECstation 5000/xxx serial mouse (DEC VSXXX-AA) support */
-/* written 2001/07/11 by Karsten Merker (merker@linuxtag.org) */
+/* Support for DEC VSXXX-AA and VSXXX-GA serial mice used on */
+/* DECstation 5000/xxx, DEC 3000 AXP and VAXstation 4000 */
+/* workstations, written 2001/07/11 by Karsten Merker */
+/* (merker@linuxtag.org) */
static int M_vsxxx_aa(Gpm_Event *state, unsigned char *data)
{
state->buttons = data[0]&0x07;
@@ -1292,8 +1294,8 @@ static int M_vsxxx_aa(Gpm_Event *state,
/* Mouse protocol is as follows:
- * 3 data bytes per packet,
* 4800 bits per second, 8 data bits, 1 stop bit, odd parity
+ * 3 data bytes per data packet:
* 7 6 5 4 3 2 1 0
* First Byte: 1 0 0 SignX SignY LMB MMB RMB
* Second Byte 0 DX DX DX DX DX DX DX
@@ -1304,8 +1306,29 @@ static int M_vsxxx_aa(Gpm_Event *state,
* DX and DY: 7-bit-absolute values for delta-X and delta-Y, sign extensions
* are in SignX resp. SignY.
*
- * Initialization is done by sending an "R" to the mouse; before receiving
- * this character, the mouse does not produce a bytestream
+ * There are a few commands the mouse accepts:
+ * "D" selects the prompt mode,
+ * "P" requests the mouse's position (also selects the prompt mode),
+ * "R" selects the incremental stream mode,
+ * "T" performs a self test and identification (power-up-like),
+ * "Z" performs undocumented test functions (a byte follows).
+ * Parity as well as bit #7 of commands are ignored by the mouse.
+ *
+ * 4 data bytes per self test packet (useful for hot-plug):
+ * 7 6 5 4 3 2 1 0
+ * First Byte: 1 0 1 0 R3 R2 R1 R0
+ * Second Byte 0 M2 M1 M0 0 0 1 0
+ * Third Byte 0 E6 E5 E4 E3 E2 E1 E0
+ * Fourth Byte 0 0 0 0 0 LMB MMB RMB
+ *
+ * R3-R0: revision,
+ * M2-M0: manufacturer location code,
+ * E6-E0: error code:
+ * 0x00-0x1f: no error (fourth byte is button state),
+ * 0x3d: button error (fourth byte specifies which),
+ * else: other error.
+ *
+ * The mouse powers up in the prompt mode but we use the stream mode.
*/
}
@@ -1455,7 +1478,7 @@ I_serial(int fd, unsigned short flags,
if (type->fun==M_vsxxx_aa)
{
- setspeed (fd, 4800, 4800, 1, flags);
+ setspeed (fd, 4800, 4800, 0, flags); /* no write */
write(fd, "R", 1); /* initialize mouse, without getting an "R" the */
/* mouse does not send a bytestream */
}
@@ -2057,9 +2080,9 @@ Gpm_Type mice[]={
{"brw", "Fellowes Browser - 4 buttons (and a wheel) (dual protocol?)",
"", M_brw, I_pnp, CS7 | STD_FLG,
{0xc0, 0x40, 0xc0, 0x00}, 4, 1, 0, 0, 0},
- {"vsxxxaa", "For the DEC VSXXX-AA serial mouse on DECstation 5000/xxx.",
+ {"vsxxxaa", "The DEC VSXXX-AA/GA serial mouse on DEC workstations.",
"", M_vsxxx_aa, I_serial, CS8 | PARENB | PARODD | STD_FLG,
- {0x80, 0x80, 0x00, 0x00}, 3, 1, 0, 0, 0},
+ {0xe0, 0x80, 0x80, 0x00}, 3, 1, 0, 0, 0},
#ifdef HAVE_LINUX_JOYSTICK_H
{"js", "Joystick mouse emulation",
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