[parisc-linux] Keyboard driver patch proposal
Xavier Debacker
xavier.debacker@esiee.net
Mon, 30 Apr 2001 00:14:42 +0200
Il s'agit d'un message multivolet au format MIME.
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Grant Grundler a =E9crit :
> Xavier,
> It seems Helge Deller has reviewed and committed most of the ESIEE team=
> work in the past. Any word on if Helge will be able to review/commit
> this patch?
I haven't read from Helge for a long time. He seems quite busy.
> BTW, I'm told the '//' comment style is not ok; "/* ... */" is expecte=
d.
> It's not mentioned in Documentation/CodingStyle so I can't explain it.
this is corrected in the patch joined here.
>
>
> thanks,
> grant
>
> Grant Grundler
> parisc-linux {PCI|IOMMU|SMP} hacker
> +1.408.447.7253
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--- hp_keyb.c Mon Mar 26 02:43:45 2001
+++ hp_keyb.c Sun Apr 29 23:20:17 2001
@@ -7,8 +7,11 @@
* 2000/10/26 Debacker Xavier (debackex@esiee.fr)
* Marteau Thomas (marteaut@esiee.fr)
* Djoudi Malek (djoudim@esiee.fr)
- * fixed some keysym defines and SC_LIM
- */
+ * fixed some keysym defines
+ *
+ * 2001/04/28 Debacker Xavier
+ * scancode translation rewritten (handle_at_scancode).
+ */
#include <linux/config.h>
#include <linux/sched.h>
@@ -179,7 +182,7 @@
/* 60 */ K_NONE, K_HASH, K_NONE, K_NONE, K_NONE, K_NONE, K_BKSP, K_NONE,
/* 68 */ K_NONE, KP_1 , K_NONE, KP_4 , KP_7 , K_NONE, K_NONE, K_NONE,
/* 70 */ KP_0 , KP_DOT, KP_2 , KP_5 , KP_6 , KP_8 , K_ESC , K_NUML,
-/* 78 */ K_F11 , KP_PLS, KP_3 , KP_MNS, KP_STR, KP_9 , K_SCRL, K_NONE,
+/* 78 */ K_F11 , KP_PLS, KP_3 , KP_MNS, KP_STR, KP_9 , K_SCRL, K_PRNT,
K_NONE, K_NONE, K_NONE, K_F7 , K_NONE, K_NONE, K_NONE, K_NONE,
K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE,
K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE,
@@ -193,7 +196,9 @@
K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE,
K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE,
K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE,
- K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE
+ K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE,
+ K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE,
+ K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, K_NONE, KBD_RESEND, K_NONE
};
/* ----- the following code stolen from pc_keyb.c */
@@ -246,7 +251,7 @@
* they needed not before. It does not matter that there are duplicates, as
* long as no duplication occurs for any single keyboard.
*/
-#define SC_LIM 59
+#define SC_LIM 89
#define FOCUS_PF1 85 /* actual code! */
#define FOCUS_PF2 89
@@ -435,6 +440,7 @@
}
} else
*keycode = scancode;
+
return 1;
}
@@ -445,75 +451,75 @@
{
}
-static inline void ps2kbd_key(unsigned int keycode, unsigned int up_flag)
-{
- handle_scancode(keycode, !up_flag);
-}
-
-static unsigned char status;
-static unsigned char ncodes;
-static unsigned char bi;
-static unsigned char buffer[4];
-
void handle_at_scancode(int keyval)
{
- int keysym;
-
- if (keyval > 0x83) {
- switch (keyval) {
- case KBD_ESCAPEE0:
- ncodes = 2;
- bi = 0;
- break;
- case KBD_ESCAPEE1:
- ncodes = 3;
- bi = 0;
- break;
- case KBD_BREAK:
- status |= CODE_BREAK;
- default:
- return;
- }
- }
-
- if (ncodes) {
- buffer[bi++] = keyval;
- ncodes -= 1;
- if (ncodes)
+ static int brk = 0;
+ static int esc0 = 0;
+ static int esc1 = 0;
+ int scancode = 0;
+
+ switch (keyval) {
+ case KBD_BREAK :
+ /* sets the "release_key" bit
+ * when a key is released
+ * HP keyboard send f0 followed by the keycode
+ * while AT keyboard send the keycode with
+ * this bit set.
+ */
+ brk = 0x80;
return;
- keysym = K_NONE;
- switch (buffer[0] << 8 | buffer[1]) {
- case ESCE0(0x11): keysym = K_RALT; break;
- case ESCE0(0x14): keysym = K_RCTL; break;
- case ESCE0(0x4a): keysym = KP_SLH; break;
- case ESCE0(0x5a): keysym = KP_ENT; break;
- case ESCE0(0x69): keysym = K_END; break;
- case ESCE0(0x6b): keysym = K_LEFT; break;
- case ESCE0(0x6c): keysym = K_HOME; break;
- case ESCE0(0x70): keysym = K_INS; break;
- case ESCE0(0x71): keysym = K_DEL; break;
- case ESCE0(0x72): keysym = K_DOWN; break;
- case ESCE0(0x74): keysym = K_RGHT; break;
- case ESCE0(0x75): keysym = K_UP; break;
- case ESCE0(0x7a): keysym = K_PGDN; break;
- case ESCE0(0x7c): keysym = K_PRNT; break;
- case ESCE0(0x7d): keysym = K_PGUP; break;
- case ESCE1(0x14):
- if (buffer[2] == 0x77)
- keysym = K_BRK;
+ case KBD_ESCAPEE0 :
+ /* 2chars sequence, commonly used
+ * to differenciate the two ALT keys
+ * and the two ENTER keys and so on...
+ */
+ esc0 = 2; /* e0-xx are 2 chars */
+ scancode = keyval;
+ break;
+ case KBD_ESCAPEE1 :
+ /* 3chars sequence, only used by the Pause key. */
+ esc1 = 3; /* e1-xx-xx are 3 chars */
+ scancode = keyval;
+ break;
+/* case KBD_RESEND :
+ * dunno what to do when it happens
+ * Request For Comments
+ * printk("\n KBD_RESEND received ");
+ * return;
+ */
+ case 0x14 :
+ /* translates e1-14-77-e1-f0-14-f0-77 to
+ * e1-1d-45-e1-9d-c5 (this is the Pause key)
+ */
+ if (esc1==2) scancode = brk | 0x1d;
+ break;
+ case 0x77 :
+ if (esc1==1) scancode = brk | 0x45;
+ break;
+ case 0x12 :
+ /* an extended key is e0-12-e0-xx e0-f0-xx-e0-f0-12
+ * on HP, while it is e0-2a-e0-xx e0-(xx|80)-f0-aa
+ * on AT.
+ */
+ if (esc0==1) scancode = brk | 0x2a;
break;
- case ESCE0(0x12): /* ignore escaped shift key */
- status = 0;
- return;
- }
- } else {
- bi = 0;
- keysym = keycode_translate[keyval];
}
+
- if (keysym != K_NONE)
- ps2kbd_key(keysym, status & CODE_BREAK);
- else
- printk("%s: K_NONE for %d\n", __FUNCTION__, keyval);
- status = 0;
+ /* translates HP scancodes to AT scancodes */
+ if (!scancode) scancode = brk | keycode_translate[keyval];
+
+
+ if (!scancode) printk("\nunexpected key code %02x ",keyval);
+
+ /* now behaves like an AT keyboard */
+ handle_scancode(scancode,!(scancode&0x80));
+
+ if (esc0) esc0--;
+ if (esc1) esc1--;
+/* printk("0x%02x ",scancode);
+ * if (!esc0 && !esc1 && brk) printk("\n");
+ */
+ /* release key bit must be unset for the next key. */
+ brk=0;
}
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