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-rw-r--r--src/dev/char/pckbd.c214
1 files changed, 214 insertions, 0 deletions
diff --git a/src/dev/char/pckbd.c b/src/dev/char/pckbd.c
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--- /dev/null
+++ b/src/dev/char/pckbd.c
@@ -0,0 +1,214 @@
+/*
+ * <pckbd.c>
+ *
+ * Open Hack'Ware BIOS PC keyboard driver.
+ *
+ * Copyright (c) 2005 Jocelyn Mayer
+ *
+ * This code is a rework (mostly simplification) from code
+ * proposed by Matthew Wood <mwood@realmsys.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License V2
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include "bios.h"
+
+/* IO definitions */
+#define PCKBD_IO_BASE 0x60
+#define PCKBD_COMMAND_OFFSET 0x4
+#define PCKBD_STATUS_OFFSET 0x4
+
+/* Indexes for keyboard state */
+#define SHIFT 0x1
+#define CTRL 0x2
+#define ALT 0x4
+
+/* Scan codes */
+#define L_SHIFT 0x2a
+#define R_SHIFT 0x36
+#define L_CTRL 0x1d
+/* XXX: R_CTRL ? */
+#define L_ALT 0x38
+/* XXX: missing capslock */
+/* XXX: TODO: add keypad/numlock ... (pc105 kbd) */
+
+typedef struct kbdmap_t kbdmap_t;
+struct kbdmap_t {
+ char translate[8];
+};
+
+typedef struct pckbd_t pckbd_t;
+struct pckbd_t {
+ int modifiers;
+ kbdmap_t *map;
+ int maplen;
+ int io_base;
+};
+
+/* XXX: should not be here cause it's locale dependent */
+static kbdmap_t pc_map_us[] = {
+ /* 0x00 */
+ { { -1, -1, -1, -1, -1, -1, -1, -1, }, },
+ { { 0x1b, 0x1b, 0x1b, 0x1b, 0x1b, 0x1b, 0x1b, 0x1b, }, },
+ { { '1', '!', -1, -1, '1', '!', -1, -1, }, },
+ { { '2', '\'', '\'', -1, -1, '2', '\'', '\'', }, },
+ { { '3', '#', -1, -1, '3', '#', -1, -1, }, },
+ { { '4', '$', -1, -1, '4', '$', -1, -1, }, },
+ { { '5', '%', -1, -1, '5', '%', -1, -1, }, },
+ { { '6', '^', -1, -1, '6', '^', -1, -1, }, },
+ /* 0x08 */
+ { { '7', '&', -1, -1, '7', '&', -1, -1, }, },
+ { { '8', '*', -1, -1, '8', '*', -1, -1, }, },
+ { { '9', '(', -1, -1, '9', '(', -1, -1, }, },
+ { { '0', ')', -1, -1, '0', ')', -1, -1, }, },
+ { { '-', '_', -1, -1, '-', '_', -1, -1, }, },
+ { { '=', '+', -1, -1, '=', '+', -1, -1, }, },
+ { { 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, }, },
+ { { 0x2a, -1, -1, -1, 0x2a, -1, -1, -1, }, },
+ /* 0x10 */
+ { { 'q', 'Q', -1, -1, 'q', 'Q', -1, -1, }, },
+ { { 'w', 'W', -1, -1, 'w', 'W', -1, -1, }, },
+ { { 'e', 'E', -1, -1, 'e', 'E', -1, -1, }, },
+ { { 'r', 'R', -1, -1, 'r', 'R', -1, -1, }, },
+ { { 't', 'T', -1, -1, 't', 'T', -1, -1, }, },
+ { { 'y', 'Y', -1, -1, 'y', 'Y', -1, -1, }, },
+ { { 'u', 'U', -1, -1, 'u', 'U', -1, -1, }, },
+ { { 'i', 'I', -1, -1, 'i', 'I', -1, -1, }, },
+ /* 0x18 */
+ { { 'o', 'O', -1, -1, 'o', 'O', -1, -1, }, },
+ { { 'p', 'P', -1, -1, 'p', 'P', -1, -1, }, },
+ { { '[', '{', 0x1b, 0x1b, '[', '{', 0x1b, 0x1b, }, },
+ { { ']', '}', -1, -1, ']', '}', -1, -1, }, },
+ { { 0x0d, 0x0d, '\r', '\r', 0x0d, 0x0d, '\r', '\r', }, },
+ { { -1, -1, -1, -1, -1, -1, -1, -1, }, },
+ { { 'a', 'A', -1, -1, 'a', 'A', -1, -1, }, },
+ { { 's', 'S', -1, -1, 's', 'S', -1, -1, }, },
+ /* 0x20 */
+ { { 'd', 'D', -1, -1, 'd', 'D', -1, -1, }, },
+ { { 'f', 'F', -1, -1, 'f', 'F', -1, -1, }, },
+ { { 'g', 'G', 0x07, 0x07, 'g', 'G', 0x07, 0x07, }, },
+ { { 'h', 'H', 0x08, 0x08, 'h', 'H', 0x08, 0x08, }, },
+ { { 'j', 'J', '\r', '\r', 'j', 'J', '\r', '\r', }, },
+ { { 'k', 'K', -1, -1, 'k', 'K', -1, -1, }, },
+ { { 'l', 'L', -1, -1, 'l', 'L', -1, -1, }, },
+ { { ';', ':', -1, -1, ';', ':', -1, -1, }, },
+ /* 0x28 */
+ { { '\'', '"', -1, -1, '\'', '"', -1, -1, }, },
+ { { '`', '~', -1, -1, '`', '~', -1, -1, }, },
+ { { 0x02, -1, -1, -1, -1, -1, -1, -1, }, },
+ { { '\\', '|', -1, -1, '\\', '|', -1, -1, }, },
+ { { 'z', 'Z', -1, -1, 'z', 'Z', -1, -1, }, },
+ { { 'x', 'X', -1, -1, 'x', 'X', -1, -1, }, },
+ { { 'c', 'C', -1, -1, 'c', 'C', -1, -1, }, },
+ { { 'v', 'V', 0x16, 0x16, 'v', 'V', -1, -1, }, },
+ /* 0x30 */
+ { { 'b', 'B', -1, -1, 'b', 'B', -1, -1, }, },
+ { { 'n', 'N', -1, -1, 'n', 'N', -1, -1, }, },
+ { { 'm', 'M', 0x0d, 0x0d, 'm', 'M', 0x0d, 0x0d, }, },
+ { { ',', '<', -1, -1, ',', '<', -1, -1, }, },
+ { { '.', '>', -1, -1, '.', '>', -1, -1, }, },
+ { { '/', '?', -1, -1, '/', '?', -1, -1, }, },
+ { { -1, -1, -1, -1, -1, -1, -1, -1, }, },
+ { { '*', '*', -1, -1, '*', '*', -1, -1, }, },
+ /* 0x38 */
+ { { -1, -1, -1, -1, -1, -1, -1, -1, }, },
+ { { ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', }, },
+};
+
+static int pckbd_open (unused void *private)
+{
+ return 0;
+}
+
+static int pckbd_close (unused void *private)
+{
+ return 0;
+}
+
+static int pckbd_readb (void *private)
+{
+ pckbd_t *kbd = private;
+ int status, key, up, mod;
+ int ret;
+
+ for (ret = -1; ret < 0; ) {
+ status = inb(kbd->io_base + PCKBD_STATUS_OFFSET);
+ if (!(status & 1)) {
+ /* No more data available */
+ break;
+ }
+ key = inb(kbd->io_base);
+ up = (key & 0x80) != 0;
+ key &= ~0x80;
+ switch (key) {
+ case 0:
+ break;
+ case L_ALT:
+ mod = ALT;
+ goto set_modifiers;
+ case L_SHIFT:
+ case R_SHIFT:
+ mod = SHIFT;
+ goto set_modifiers;
+ case L_CTRL:
+#if 0 /* XXX: missing definition */
+ case R_CTRL:
+#endif
+ mod = CTRL;
+ set_modifiers:
+ if (up)
+ kbd->modifiers &= ~mod;
+ else
+ kbd->modifiers |= mod;
+ break;
+ default:
+ /* We don't care about up events or unknown keys */
+ if (!up && key < kbd->maplen)
+ ret = kbd->map[key].translate[kbd->modifiers];
+ break;
+ }
+ }
+
+ return ret;
+}
+
+static cops_t pckbd_ops = {
+ &pckbd_open,
+ &pckbd_close,
+ &pckbd_readb,
+ NULL,
+};
+
+int pckbd_register (void)
+{
+ pckbd_t *kbd;
+
+ kbd = malloc(sizeof(pckbd_t));
+ if (kbd == NULL)
+ return -1;
+ memset(kbd, 0, sizeof(pckbd_t));
+ /* Set IO base */
+ /* XXX: should be a parameter... */
+ kbd->io_base = PCKBD_IO_BASE;
+ /* Set default keymap */
+ kbd->map = pc_map_us;
+ kbd->maplen = sizeof(pc_map_us) / sizeof(kbdmap_t);
+ /* Reset modifiers state */
+ kbd->modifiers = 0x00;
+ chardev_register(CHARDEV_KBD, &pckbd_ops, kbd);
+
+ return 0;
+}
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