[freenos] r272 committed - Implemented a PS2 keyboard driver using the new Device class....
- From: codesite-noreply@xxxxxxxxxx
- To: freenos@xxxxxxxxxxxxx
- Date: Sun, 02 Aug 2009 12:47:38 +0000
Revision: 272
Author: nieklinnenbank
Date: Sun Aug 2 04:56:56 2009
Log: Implemented a PS2 keyboard driver using the new Device class.
It is usable via /dev/keyboard0 and implements the interrupt() function
to update it's state when a key status has changed.
http://code.google.com/p/freenos/source/detail?r=272
Added:
/trunk/srv/input
/trunk/srv/input/SConscript
/trunk/srv/input/keyboard
/trunk/srv/input/keyboard/Keyboard.cpp
/trunk/srv/input/keyboard/Keyboard.h
/trunk/srv/input/keyboard/Main.cpp
/trunk/srv/input/keyboard/SConscript
=======================================
--- /dev/null
+++ /trunk/srv/input/SConscript Sun Aug 2 04:56:56 2009
@@ -0,0 +1,18 @@
+#
+# Copyright (C) 2009 Niek Linnenbank
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# 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, see <http://www.gnu.org/licenses/>.
+#
+
+SConscript(dirs = [ 'keyboard' ])
=======================================
--- /dev/null
+++ /trunk/srv/input/keyboard/Keyboard.cpp Sun Aug 2 04:56:56 2009
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2009 Niek Linnenbank
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <API/ProcessCtl.h>
+#include <Macros.h>
+#include <Error.h>
+#include <Config.h>
+#include "Keyboard.h"
+
+/**
+ * Temporary hardcoded keyboard map, from kb.c in SkelixOS.
+ * @see http://www.skelix.org
+ */
+const char Keyboard::keymap[0x3a][2] =
+{
+ /*00*/{0x0, 0x0}, {0x0, 0x0}, {'1', '!'}, {'2', '@'},
+ /*04*/{'3', '#'}, {'4', '$'}, {'5', '%'}, {'6', '^'},
+ /*08*/{'7', '&'}, {'8', '*'}, {'9', '('}, {'0', ')'},
+ /*0c*/{'-', '_'}, {'=', '+'}, {'\b','\b'},{'\t','\t'},
+ /*10*/{'q', 'Q'}, {'w', 'W'}, {'e', 'E'}, {'r', 'R'},
+ /*14*/{'t', 'T'}, {'y', 'Y'}, {'u', 'U'}, {'i', 'I'},
+ /*18*/{'o', 'O'}, {'p', 'P'}, {'[', '{'}, {']', '}'},
+ /*1c*/{'\n','\n'},{0x0, 0x0}, {'a', 'A'}, {'s', 'S'},
+ /*20*/{'d', 'D'}, {'f', 'F'}, {'g', 'G'}, {'h', 'H'},
+ /*24*/{'j', 'J'}, {'k', 'K'}, {'l', 'L'}, {';', ':'},
+ /*28*/{'\'','\"'},{'`', '~'}, {0x0, 0x0}, {'\\','|'},
+ /*2c*/{'z', 'Z'}, {'x', 'X'}, {'c', 'C'}, {'v', 'V'},
+ /*30*/{'b', 'B'}, {'n', 'N'}, {'m', 'M'}, {',', '<'},
+ /*34*/{'.', '>'}, {'/', '?'}, {0x0, 0x0}, {'*', '*'},
+ /*38*/{0x0, 0x0}, {' ', ' '}
+};
+
+Keyboard::Keyboard() : shiftState(ZERO)
+{
+}
+
+Error Keyboard::initialize()
+{
+ return ProcessCtl(SELF, AllowIO, PS2_PORT);
+}
+
+Error Keyboard::interrupt(Size vector)
+{
+ pending = true;
+ return ESUCCESS;
+}
+
+Error Keyboard::read(s8 *buffer, Size size, Size offset)
+{
+ /* Do we have any new key events? */
+ if (pending)
+ {
+ pending = false;
+
+ /*
+ * Read byte from the keyboard.
+ */
+ u8 keycode = inb(PS2_PORT);
+
+ /* Update shift state. */
+ if (keycode == 0x2a || keycode == 0xaa)
+ {
+ shiftState ^= 1;
+ }
+ /* Don't do anything on release. */
+ else if (!(keycode & PS2_RELEASE) &&
+ (keymap[keycode & 0x7f][shiftState]))
+ {
+ /* Write to buffer. */
+ buffer[0] = keymap[keycode & 0x7f][shiftState];
+ return 1;
+ }
+ }
+ return EAGAIN;
+}
=======================================
--- /dev/null
+++ /trunk/srv/input/keyboard/Keyboard.h Sun Aug 2 04:56:56 2009
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2009 Niek Linnenbank
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __INPUT_KEYBOARD_H
+#define __INPUT_KEYBOARD_H
+
+#include <Device.h>
+#include <Macros.h>
+#include <Types.h>
+#include <Error.h>
+
+/** PS2 Keyboard input port. */
+#define PS2_PORT 0x60
+
+/** Interrupt number of the i8042 controller. */
+#define PS2_IRQ 1
+
+/** Bit is set in the scancode, if a key is released. */
+#define PS2_RELEASE 0x80
+
+/**
+ * @brief PS2 Keyboard device driver.
+ */
+class Keyboard : public Device
+{
+ public:
+
+ /**
+ * @brief Constructor function.
+ */
+ Keyboard();
+
+ /**
+ * @brief Initialize the PS2 Keyboard driver.
+ * @return Error status code.
+ */
+ Error initialize();
+
+ /**
+ * @brief Executed when a key state has changed.
+ * @param vector Interrupt vector.
+ * @return Error status code.
+ */
+ Error interrupt(Size vector);
+
+ /**
+ * @brief Read a character from the keyboard.
+ *
+ * @param buffer Output buffer.
+ * @param size Number of bytes to read.
+ * @param offset Unused.
+ * @return Number of bytes read or error code on failure.
+ */
+ Error read(s8 *buffer, Size size, Size offset);
+
+ private:
+
+ /**
+ * @brief Keyboard map table.
+ */
+ static const char keymap[0x3a][2];
+
+ /**
+ * @brief State of the shift key.
+ *
+ * Non-zero if pressed, and ZERO otherwise.
+ */
+ u8 shiftState;
+
+ /** Do we have a byte ready? */
+ bool pending;
+};
+
+#endif /* __INPUT_KEYBOARD_H */
=======================================
--- /dev/null
+++ /trunk/srv/input/keyboard/Main.cpp Sun Aug 2 04:56:56 2009
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2009 Niek Linnenbank
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <FileType.h>
+#include <DeviceServer.h>
+#include "Keyboard.h"
+#include <stdlib.h>
+#include <unistd.h>
+
+int main(int argc, char **argv)
+{
+ DeviceServer server("keyboard", CharacterDeviceFile);
+
+ /* Create a new keyboard object. */
+ Keyboard *kb = new Keyboard;
+
+ /* Register it with the DeviceServer. */
+ server.add(kb);
+ server.interrupt(kb, PS2_IRQ);
+
+ /*
+ * Start processing requests.
+ */
+ return server.run();
+}
=======================================
--- /dev/null
+++ /trunk/srv/input/keyboard/SConscript Sun Aug 2 04:56:56 2009
@@ -0,0 +1,24 @@
+#
+# Copyright (C) 2009 Niek Linnenbank
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# 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, see <http://www.gnu.org/licenses/>.
+#
+
+from build import *
+
+env = Prepare(target,
[ 'libcrt', 'liballoc', 'libposix', 'libexec', 'libc', 'libteken' ],
+ [ 'filesystem', 'process', 'memory' ])
+
+env.Program('server', [ 'Keyboard.cpp', 'Main.cpp' ],
+ LIBS = env['LIBS'], LIBPATH = env['LIBPATH'])
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- » [freenos] r272 committed - Implemented a PS2 keyboard driver using the new Device class.... - codesite-noreply
