[src/trunk]: src/sys/dev/adb fix Kensington Turbo Mouse support properly

[macallan <macallan%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/03c4f9a63333
branches:  trunk
changeset: 463576:03c4f9a63333
user:      macallan <macallan%NetBSD.org@localhost>
date:      Sat Aug 31 02:14:51 2019 +0000

description:
fix Kensington Turbo Mouse support properly
- program the buttons sanely ( as left & right mouse buttons, no toggles and
  no ridiculous debounce delay either ) - apparently the init values were
  cargo culted from cthulhu knows where
- don't fudge buttons anymore, now that they behave sanely
- add comments on what I could figure out the init command actually does
- leave in code to find checksum values for init commands, at least until I
  can figure out what exactly the checksum is
Todo: deal with models that have more than 2 buttons, figure out what the rest
      of the init command does

diffstat:

 sys/dev/adb/adb_ms.c |  63 +++++++++++++++++++++++++++++++++++++++++++++++----
 1 files changed, 57 insertions(+), 6 deletions(-)

diffs (102 lines):

diff -r ce4483677d54 -r 03c4f9a63333 sys/dev/adb/adb_ms.c
--- a/sys/dev/adb/adb_ms.c      Sat Aug 31 01:49:45 2019 +0000
+++ b/sys/dev/adb/adb_ms.c      Sat Aug 31 02:14:51 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: adb_ms.c,v 1.17 2019/08/30 19:24:03 macallan Exp $     */
+/*     $NetBSD: adb_ms.c,v 1.18 2019/08/31 02:14:51 macallan Exp $     */
 
 /*
  * Copyright (C) 1998  Colin Wood
@@ -32,7 +32,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: adb_ms.c,v 1.17 2019/08/30 19:24:03 macallan Exp $");
+__KERNEL_RCSID(0, "$NetBSD: adb_ms.c,v 1.18 2019/08/31 02:14:51 macallan Exp $");
 
 #include <sys/param.h>
 #include <sys/device.h>
@@ -326,18 +326,72 @@
        uint8_t addr;
 
        /* Found Kensington Turbo Mouse */
+
+/*
+ * byte 1 assigns what which button does
+ - 0x08 - button 1 - 1, button 2 - nothing
+ - 0x09 - both buttons - 1
+ - 0x0a - butoon 1 - 1, button 2 - toggle 1
+ - 0x0b - button 1 - 1, button 2 - nothing
+ - 0x0c - button 1 - 1, button 2 - 2
+ - 0x0e - button 1 - 1, button 2 - 3
+ - 0x0f - button 1 - 1, button 2 - toggle 3
+ - 0x10 - button 1 toggle 1, button 2 nothing
+ - 0x11 - button 1 - toggle 1, button 2 - 1
+ - 0x12 - both toggle 1
+ - 0x14 - button 1 toggle 1, button 2 - 2
+ - 0x21 - button 1 - 2, button 2 - 1
+ - 0x31 - button 1 - 3, button 2 - 1
+ * byte 4 programs a delay for button presses, apparently in 1/100 seconds
+ * byte 7 is some sort of checksum, writes will only stick if it's valid
+          no idea how exactly it works yet, can't be too complicated considering
+          the device's age
+ */
+ 
+/*
+ * XXX
+ * I doubt the first command is actually necessary. Leave in for now since it 
+ * doesn't do any harm either
+ */
        static u_char data1[] =
                { 0xe7, 0x8c, 0, 0, 0, 0xff, 0xff, 0x94 };
+
+       /* this seems to be the most reasonable default */
        static u_char data2[] =
-               { 0xa5, 0x14, 0, 0, 0x69, 0xff, 0xff, 0x27 };
+               { 0xa5, 0x0e, 0, 0, 1, 0xff, 0xff, 0x55 };
 
        addr = sc->sc_adbdev->current_addr;
 
+#ifdef ADBMS_DEBUG
+       {
+               int i;
+               adbms_send_sync(sc, ADBTALK(addr, 2), 0, NULL);
+               printf("reg *");
+               for (i = 0; i < sc->sc_msg_len; i++)
+                       printf(" %02x", sc->sc_buffer[i]);
+               printf("\n");
+       }
+#endif
+
        adbms_send_sync(sc, ADBFLUSH(addr), 0, NULL);
        adbms_send_sync(sc, ADBLISTEN(addr, 2), 8, data1);
        adbms_send_sync(sc, ADBFLUSH(addr), 0, NULL);
        adbms_send_sync(sc, ADBLISTEN(addr, 2), 8, data2);
 
+#ifdef ADBMS_BRUTEFORCE
+       sc->sc_buffer[1] = 0;
+       int y = 0;
+       while ((sc->sc_buffer[1] != data2[1]) && (y < 0x100)) {
+               data2[7] = y;
+               y++;
+               adbms_send_sync(sc, ADBFLUSH(addr), 0, NULL);
+               adbms_send_sync(sc, ADBLISTEN(addr, 2), 8, data2);
+               adbms_send_sync(sc, ADBFLUSH(addr), 0, NULL);
+               adbms_send_sync(sc, ADBTALK(addr, 2), 0, NULL);
+       }
+       printf("y %02x\n", data2[7]);   
+#endif
+
 #ifdef ADBMS_DEBUG
        int i, reg;
        for (reg = 1; reg < 4; reg++) {
@@ -607,9 +661,6 @@
 #ifdef ADBMS_DEBUG
                printf("%d %d %08x %d\n", dx, dy, smask, shift);
 #endif
-               if (sc->sc_adbdev->handler_id == ADBMS_TURBO) {
-                       buttons = (buttons != 0) ? 1 : 0;
-               }
        }
 
        if (sc->sc_class == MSCLASS_TRACKPAD) {