m68k: Atari keyboard and mouse support.

Atari keyboard and mouse support.
(reformating and Kconfig fixes by Roman Zippel)

Signed-off-by: Michael Schmitz <schmitz@debian.org>
Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 731 insertions, 0 deletions

diff --git a/arch/m68k/atari/Makefile b/arch/m68k/atari/Makefile
index 8cb6236b39..2cb86191f0 100644
--- a/arch/m68k/atari/Makefile
+++ b/arch/m68k/atari/Makefile
@@ -8,3 +8,4 @@ obj-y		:= config.o time.o debug.o ataints.o stdma.o \
 ifeq ($(CONFIG_PCI),y)
 obj-$(CONFIG_HADES)     += hades-pci.o
 endif
+obj-$(CONFIG_ATARI_KBD_CORE)    += atakeyb.o
diff --git a/arch/m68k/atari/atakeyb.c b/arch/m68k/atari/atakeyb.c
new file mode 100644
index 0000000000..1c29603b16
--- /dev/null
+++ b/arch/m68k/atari/atakeyb.c
@@ -0,0 +1,730 @@
+/*
+ * linux/atari/atakeyb.c
+ *
+ * Atari Keyboard driver for 680x0 Linux
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+/*
+ * Atari support by Robert de Vries
+ * enhanced by Bjoern Brauel and Roman Hodek
+ */
+
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/errno.h>
+#include <linux/keyboard.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/kd.h>
+#include <linux/random.h>
+#include <linux/init.h>
+#include <linux/kbd_kern.h>
+
+#include <asm/atariints.h>
+#include <asm/atarihw.h>
+#include <asm/atarikb.h>
+#include <asm/atari_joystick.h>
+#include <asm/irq.h>
+
+static void atakeyb_rep(unsigned long ignore);
+extern unsigned int keymap_count;
+
+/* Hook for MIDI serial driver */
+void (*atari_MIDI_interrupt_hook) (void);
+/* Hook for mouse driver */
+void (*atari_mouse_interrupt_hook) (char *);
+/* Hook for keyboard inputdev  driver */
+void (*atari_input_keyboard_interrupt_hook) (unsigned char, char);
+/* Hook for mouse inputdev  driver */
+void (*atari_input_mouse_interrupt_hook) (char *);
+
+/* variables for IKBD self test: */
+
+/* state: 0: off; >0: in progress; >1: 0xf1 received */
+static volatile int ikbd_self_test;
+/* timestamp when last received a char */
+static volatile unsigned long self_test_last_rcv;
+/* bitmap of keys reported as broken */
+static unsigned long broken_keys[128/(sizeof(unsigned long)*8)] = { 0, };
+
+#define BREAK_MASK      (0x80)
+
+/*
+ * ++roman: The following changes were applied manually:
+ *
+ *  - The Alt (= Meta) key works in combination with Shift and
+ *    Control, e.g. Alt+Shift+a sends Meta-A (0xc1), Alt+Control+A sends
+ *    Meta-Ctrl-A (0x81) ...
+ *
+ *  - The parentheses on the keypad send '(' and ')' with all
+ *    modifiers (as would do e.g. keypad '+'), but they cannot be used as
+ *    application keys (i.e. sending Esc O c).
+ *
+ *  - HELP and UNDO are mapped to be F21 and F24, resp, that send the
+ *    codes "\E[M" and "\E[P". (This is better than the old mapping to
+ *    F11 and F12, because these codes are on Shift+F1/2 anyway.) This
+ *    way, applications that allow their own keyboard mappings
+ *    (e.g. tcsh, X Windows) can be configured to use them in the way
+ *    the label suggests (providing help or undoing).
+ *
+ *  - Console switching is done with Alt+Fx (consoles 1..10) and
+ *    Shift+Alt+Fx (consoles 11..20).
+ *
+ *  - The misc. special function implemented in the kernel are mapped
+ *    to the following key combinations:
+ *
+ *      ClrHome          -> Home/Find
+ *      Shift + ClrHome  -> End/Select
+ *      Shift + Up       -> Page Up
+ *      Shift + Down     -> Page Down
+ *      Alt + Help       -> show system status
+ *      Shift + Help     -> show memory info
+ *      Ctrl + Help      -> show registers
+ *      Ctrl + Alt + Del -> Reboot
+ *      Alt + Undo       -> switch to last console
+ *      Shift + Undo     -> send interrupt
+ *      Alt + Insert     -> stop/start output (same as ^S/^Q)
+ *      Alt + Up         -> Scroll back console (if implemented)
+ *      Alt + Down       -> Scroll forward console (if implemented)
+ *      Alt + CapsLock   -> NumLock
+ *
+ * ++Andreas:
+ *
+ *  - Help mapped to K_HELP
+ *  - Undo mapped to K_UNDO (= K_F246)
+ *  - Keypad Left/Right Parenthesis mapped to new K_PPAREN[LR]
+ */
+
+static u_short ataplain_map[NR_KEYS] __initdata = {
+        0xf200, 0xf01b, 0xf031, 0xf032, 0xf033, 0xf034, 0xf035, 0xf036,
+        0xf037, 0xf038, 0xf039, 0xf030, 0xf02d, 0xf03d, 0xf008, 0xf009,
+        0xfb71, 0xfb77, 0xfb65, 0xfb72, 0xfb74, 0xfb79, 0xfb75, 0xfb69,
+        0xfb6f, 0xfb70, 0xf05b, 0xf05d, 0xf201, 0xf702, 0xfb61, 0xfb73,
+        0xfb64, 0xfb66, 0xfb67, 0xfb68, 0xfb6a, 0xfb6b, 0xfb6c, 0xf03b,
+        0xf027, 0xf060, 0xf700, 0xf05c, 0xfb7a, 0xfb78, 0xfb63, 0xfb76,
+        0xfb62, 0xfb6e, 0xfb6d, 0xf02c, 0xf02e, 0xf02f, 0xf700, 0xf200,
+        0xf703, 0xf020, 0xf207, 0xf100, 0xf101, 0xf102, 0xf103, 0xf104,
+        0xf105, 0xf106, 0xf107, 0xf108, 0xf109, 0xf200, 0xf200, 0xf114,
+        0xf603, 0xf200, 0xf30b, 0xf601, 0xf200, 0xf602, 0xf30a, 0xf200,
+        0xf600, 0xf200, 0xf115, 0xf07f, 0xf200, 0xf200, 0xf200, 0xf200,
+        0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200,
+        0xf200, 0xf1ff, 0xf11b, 0xf312, 0xf313, 0xf30d, 0xf30c, 0xf307,
+        0xf308, 0xf309, 0xf304, 0xf305, 0xf306, 0xf301, 0xf302, 0xf303,
+        0xf300, 0xf310, 0xf30e, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200,
+        0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200, 0xf200
+};
+
+typedef enum kb_state_t {
+        KEYBOARD, AMOUSE, RMOUSE, JOYSTICK, CLOCK, RESYNC
+} KB_STATE_T;
+
+#define IS_SYNC_CODE(sc)        ((sc) >= 0x04 && (sc) <= 0xfb)
+
+typedef struct keyboard_state {
+        unsigned char buf[6];
+        int len;
+        KB_STATE_T state;
+} KEYBOARD_STATE;
+
+KEYBOARD_STATE kb_state;
+
+#define DEFAULT_KEYB_REP_DELAY  (HZ/4)
+#define DEFAULT_KEYB_REP_RATE   (HZ/25)
+
+/* These could be settable by some ioctl() in future... */
+static unsigned int key_repeat_delay = DEFAULT_KEYB_REP_DELAY;
+static unsigned int key_repeat_rate = DEFAULT_KEYB_REP_RATE;
+
+static unsigned char rep_scancode;
+static struct timer_list atakeyb_rep_timer = {
+        .function = atakeyb_rep,
+};
+
+static void atakeyb_rep(unsigned long ignore)
+{
+        /* Disable keyboard for the time we call handle_scancode(), else a race
+         * in the keyboard tty queue may happen */
+        atari_disable_irq(IRQ_MFP_ACIA);
+        del_timer(&atakeyb_rep_timer);
+
+        /* A keyboard int may have come in before we disabled the irq, so
+         * double-check whether rep_scancode is still != 0 */
+        if (rep_scancode) {
+                init_timer(&atakeyb_rep_timer);
+                atakeyb_rep_timer.expires = jiffies + key_repeat_rate;
+                add_timer(&atakeyb_rep_timer);
+
+                //handle_scancode(rep_scancode, 1);
+                if (atari_input_keyboard_interrupt_hook)
+                        atari_input_keyboard_interrupt_hook(rep_scancode, 1);
+        }
+
+        atari_enable_irq(IRQ_MFP_ACIA);
+}
+
+
+/* ++roman: If a keyboard overrun happened, we can't tell in general how much
+ * bytes have been lost and in which state of the packet structure we are now.
+ * This usually causes keyboards bytes to be interpreted as mouse movements
+ * and vice versa, which is very annoying. It seems better to throw away some
+ * bytes (that are usually mouse bytes) than to misinterpret them. Therefor I
+ * introduced the RESYNC state for IKBD data. In this state, the bytes up to
+ * one that really looks like a key event (0x04..0xf2) or the start of a mouse
+ * packet (0xf8..0xfb) are thrown away, but at most 2 bytes. This at least
+ * speeds up the resynchronization of the event structure, even if maybe a
+ * mouse movement is lost. However, nothing is perfect. For bytes 0x01..0x03,
+ * it's really hard to decide whether they're mouse or keyboard bytes. Since
+ * overruns usually occur when moving the Atari mouse rapidly, they're seen as
+ * mouse bytes here. If this is wrong, only a make code of the keyboard gets
+ * lost, which isn't too bad. Loosing a break code would be disastrous,
+ * because then the keyboard repeat strikes...
+ */
+
+static irqreturn_t atari_keyboard_interrupt(int irq, void *dummy)
+{
+        u_char acia_stat;
+        int scancode;
+        int break_flag;
+
+repeat:
+        if (acia.mid_ctrl & ACIA_IRQ)
+                if (atari_MIDI_interrupt_hook)
+                        atari_MIDI_interrupt_hook();
+        acia_stat = acia.key_ctrl;
+        /* check out if the interrupt came from this ACIA */
+        if (!((acia_stat | acia.mid_ctrl) & ACIA_IRQ))
+                return IRQ_HANDLED;
+
+        if (acia_stat & ACIA_OVRN) {
+                /* a very fast typist or a slow system, give a warning */
+                /* ...happens often if interrupts were disabled for too long */
+                printk(KERN_DEBUG "Keyboard overrun\n");
+                scancode = acia.key_data;
+                /* Turn off autorepeating in case a break code has been lost */
+                del_timer(&atakeyb_rep_timer);
+                rep_scancode = 0;
+                if (ikbd_self_test)
+                        /* During self test, don't do resyncing, just process the code */
+                        goto interpret_scancode;
+                else if (IS_SYNC_CODE(scancode)) {
+                        /* This code seem already to be the start of a new packet or a
+                         * single scancode */
+                        kb_state.state = KEYBOARD;
+                        goto interpret_scancode;
+                } else {
+                        /* Go to RESYNC state and skip this byte */
+                        kb_state.state = RESYNC;
+                        kb_state.len = 1;       /* skip max. 1 another byte */
+                        goto repeat;
+                }
+        }
+
+        if (acia_stat & ACIA_RDRF) {
+                /* received a character */
+                scancode = acia.key_data;       /* get it or reset the ACIA, I'll get it! */
+                tasklet_schedule(&keyboard_tasklet);
+        interpret_scancode:
+                switch (kb_state.state) {
+                case KEYBOARD:
+                        switch (scancode) {
+                        case 0xF7:
+                                kb_state.state = AMOUSE;
+                                kb_state.len = 0;
+                                break;
+
+                        case 0xF8:
+                        case 0xF9:
+                        case 0xFA:
+                        case 0xFB:
+                                kb_state.state = RMOUSE;
+                                kb_state.len = 1;
+                                kb_state.buf[0] = scancode;
+                                break;
+
+                        case 0xFC:
+                                kb_state.state = CLOCK;
+                                kb_state.len = 0;
+                                break;
+
+                        case 0xFE:
+                        case 0xFF:
+                                kb_state.state = JOYSTICK;
+                                kb_state.len = 1;
+                                kb_state.buf[0] = scancode;
+                                break;
+
+                        case 0xF1:
+                                /* during self-test, note that 0xf1 received */
+                                if (ikbd_self_test) {
+                                        ++ikbd_self_test;
+                                        self_test_last_rcv = jiffies;
+                                        break;
+                                }
+                                /* FALL THROUGH */
+
+                        default:
+                                break_flag = scancode & BREAK_MASK;
+                                scancode &= ~BREAK_MASK;
+                                if (ikbd_self_test) {
+                                        /* Scancodes sent during the self-test stand for broken
+                                         * keys (keys being down). The code *should* be a break
+                                         * code, but nevertheless some AT keyboard interfaces send
+                                         * make codes instead. Therefore, simply ignore
+                                         * break_flag...
+                                         */
+                                        int keyval = plain_map[scancode], keytyp;
+
+                                        set_bit(scancode, broken_keys);
+                                        self_test_last_rcv = jiffies;
+                                        keyval = plain_map[scancode];
+                                        keytyp = KTYP(keyval) - 0xf0;
+                                        keyval = KVAL(keyval);
+
+                                        printk(KERN_WARNING "Key with scancode %d ", scancode);
+                                        if (keytyp == KT_LATIN || keytyp == KT_LETTER) {
+                                                if (keyval < ' ')
+                                                        printk("('^%c') ", keyval + '@');
+                                                else
+                                                        printk("('%c') ", keyval);
+                                        }
+                                        printk("is broken -- will be ignored.\n");
+                                        break;
+                                } else if (test_bit(scancode, broken_keys))
+                                        break;
+
+#if 0   // FIXME; hangs at boot
+                                if (break_flag) {
+                                        del_timer(&atakeyb_rep_timer);
+                                        rep_scancode = 0;
+                                } else {
+                                        del_timer(&atakeyb_rep_timer);
+                                        rep_scancode = scancode;
+                                        atakeyb_rep_timer.expires = jiffies + key_repeat_delay;
+                                        add_timer(&atakeyb_rep_timer);
+                                }
+#endif
+
+                                // handle_scancode(scancode, !break_flag);
+                                if (atari_input_keyboard_interrupt_hook)
+                                        atari_input_keyboard_interrupt_hook((unsigned char)scancode, !break_flag);
+                                break;
+                        }
+                        break;
+
+                case AMOUSE:
+                        kb_state.buf[kb_state.len++] = scancode;
+                        if (kb_state.len == 5) {
+                                kb_state.state = KEYBOARD;
+                                /* not yet used */
+                                /* wake up someone waiting for this */
+                        }
+                        break;
+
+                case RMOUSE:
+                        kb_state.buf[kb_state.len++] = scancode;
+                        if (kb_state.len == 3) {
+                                kb_state.state = KEYBOARD;
+                                if (atari_mouse_interrupt_hook)
+                                        atari_mouse_interrupt_hook(kb_state.buf);
+                        }
+                        break;
+
+                case JOYSTICK:
+                        kb_state.buf[1] = scancode;
+                        kb_state.state = KEYBOARD;
+#ifdef FIXED_ATARI_JOYSTICK
+                        atari_joystick_interrupt(kb_state.buf);
+#endif
+                        break;
+
+                case CLOCK:
+                        kb_state.buf[kb_state.len++] = scancode;
+                        if (kb_state.len == 6) {
+                                kb_state.state = KEYBOARD;
+                                /* wake up someone waiting for this.
+                                   But will this ever be used, as Linux keeps its own time.
+                                   Perhaps for synchronization purposes? */
+                                /* wake_up_interruptible(&clock_wait); */
+                        }
+                        break;
+
+                case RESYNC:
+                        if (kb_state.len <= 0 || IS_SYNC_CODE(scancode)) {
+                                kb_state.state = KEYBOARD;
+                                goto interpret_scancode;
+                        }
+                        kb_state.len--;
+                        break;
+                }
+        }
+
+#if 0
+        if (acia_stat & ACIA_CTS)
+                /* cannot happen */;
+#endif
+
+        if (acia_stat & (ACIA_FE | ACIA_PE)) {
+                printk("Error in keyboard communication\n");
+        }
+
+        /* handle_scancode() can take a lot of time, so check again if
+         * some character arrived
+         */
+        goto repeat;
+}
+
+/*
+ * I write to the keyboard without using interrupts, I poll instead.
+ * This takes for the maximum length string allowed (7) at 7812.5 baud
+ * 8 data 1 start 1 stop bit: 9.0 ms
+ * If this takes too long for normal operation, interrupt driven writing
+ * is the solution. (I made a feeble attempt in that direction but I
+ * kept it simple for now.)
+ */
+void ikbd_write(const char *str, int len)
+{
+        u_char acia_stat;
+
+        if ((len < 1) || (len > 7))
+                panic("ikbd: maximum string length exceeded");
+        while (len) {
+                acia_stat = acia.key_ctrl;
+                if (acia_stat & ACIA_TDRE) {
+                        acia.key_data = *str++;
+                        len--;
+                }
+        }
+}
+
+/* Reset (without touching the clock) */
+void ikbd_reset(void)
+{
+        static const char cmd[2] = { 0x80, 0x01 };
+
+        ikbd_write(cmd, 2);
+
+        /*
+         * if all's well code 0xF1 is returned, else the break codes of
+         * all keys making contact
+         */
+}
+
+/* Set mouse button action */
+void ikbd_mouse_button_action(int mode)
+{
+        char cmd[2] = { 0x07, mode };
+
+        ikbd_write(cmd, 2);
+}
+
+/* Set relative mouse position reporting */
+void ikbd_mouse_rel_pos(void)
+{
+        static const char cmd[1] = { 0x08 };
+
+        ikbd_write(cmd, 1);
+}
+
+/* Set absolute mouse position reporting */
+void ikbd_mouse_abs_pos(int xmax, int ymax)
+{
+        char cmd[5] = { 0x09, xmax>>8, xmax&0xFF, ymax>>8, ymax&0xFF };
+
+        ikbd_write(cmd, 5);
+}
+
+/* Set mouse keycode mode */
+void ikbd_mouse_kbd_mode(int dx, int dy)
+{
+        char cmd[3] = { 0x0A, dx, dy };
+
+        ikbd_write(cmd, 3);
+}
+
+/* Set mouse threshold */
+void ikbd_mouse_thresh(int x, int y)
+{
+        char cmd[3] = { 0x0B, x, y };
+
+        ikbd_write(cmd, 3);
+}
+
+/* Set mouse scale */
+void ikbd_mouse_scale(int x, int y)
+{
+        char cmd[3] = { 0x0C, x, y };
+
+        ikbd_write(cmd, 3);
+}
+
+/* Interrogate mouse position */
+void ikbd_mouse_pos_get(int *x, int *y)
+{
+        static const char cmd[1] = { 0x0D };
+
+        ikbd_write(cmd, 1);
+
+        /* wait for returning bytes */
+}
+
+/* Load mouse position */
+void ikbd_mouse_pos_set(int x, int y)
+{
+        char cmd[6] = { 0x0E, 0x00, x>>8, x&0xFF, y>>8, y&0xFF };
+
+        ikbd_write(cmd, 6);
+}
+
+/* Set Y=0 at bottom */
+void ikbd_mouse_y0_bot(void)
+{
+        static const char cmd[1] = { 0x0F };
+
+        ikbd_write(cmd, 1);
+}
+
+/* Set Y=0 at top */
+void ikbd_mouse_y0_top(void)
+{
+        static const char cmd[1] = { 0x10 };
+
+        ikbd_write(cmd, 1);
+}
+
+/* Resume */
+void ikbd_resume(void)
+{
+        static const char cmd[1] = { 0x11 };
+
+        ikbd_write(cmd, 1);
+}
+
+/* Disable mouse */
+void ikbd_mouse_disable(void)
+{
+        static const char cmd[1] = { 0x12 };
+
+        ikbd_write(cmd, 1);
+}
+
+/* Pause output */
+void ikbd_pause(void)
+{
+        static const char cmd[1] = { 0x13 };
+
+        ikbd_write(cmd, 1);
+}
+
+/* Set joystick event reporting */
+void ikbd_joystick_event_on(void)
+{
+        static const char cmd[1] = { 0x14 };
+
+        ikbd_write(cmd, 1);
+}
+
+/* Set joystick interrogation mode */
+void ikbd_joystick_event_off(void)
+{
+        static const char cmd[1] = { 0x15 };
+
+        ikbd_write(cmd, 1);
+}
+
+/* Joystick interrogation */
+void ikbd_joystick_get_state(void)
+{
+        static const char cmd[1] = { 0x16 };
+
+        ikbd_write(cmd, 1);
+}
+
+#if 0
+/* This disables all other ikbd activities !!!! */
+/* Set joystick monitoring */
+void ikbd_joystick_monitor(int rate)
+{
+        static const char cmd[2] = { 0x17, rate };
+
+        ikbd_write(cmd, 2);
+
+        kb_state.state = JOYSTICK_MONITOR;
+}
+#endif
+
+/* some joystick routines not in yet (0x18-0x19) */
+
+/* Disable joysticks */
+void ikbd_joystick_disable(void)
+{
+        static const char cmd[1] = { 0x1A };
+
+        ikbd_write(cmd, 1);
+}
+
+/* Time-of-day clock set */
+void ikbd_clock_set(int year, int month, int day, int hour, int minute, int second)
+{
+        char cmd[7] = { 0x1B, year, month, day, hour, minute, second };
+
+        ikbd_write(cmd, 7);
+}
+
+/* Interrogate time-of-day clock */
+void ikbd_clock_get(int *year, int *month, int *day, int *hour, int *minute, int second)
+{
+        static const char cmd[1] = { 0x1C };
+
+        ikbd_write(cmd, 1);
+}
+
+/* Memory load */
+void ikbd_mem_write(int address, int size, char *data)
+{
+        panic("Attempt to write data into keyboard memory");
+}
+
+/* Memory read */
+void ikbd_mem_read(int address, char data[6])
+{
+        char cmd[3] = { 0x21, address>>8, address&0xFF };
+
+        ikbd_write(cmd, 3);
+
+        /* receive data and put it in data */
+}
+
+/* Controller execute */
+void ikbd_exec(int address)
+{
+        char cmd[3] = { 0x22, address>>8, address&0xFF };
+
+        ikbd_write(cmd, 3);
+}
+
+/* Status inquiries (0x87-0x9A) not yet implemented */
+
+/* Set the state of the caps lock led. */
+void atari_kbd_leds(unsigned int leds)
+{
+        char cmd[6] = {32, 0, 4, 1, 254 + ((leds & 4) != 0), 0};
+
+        ikbd_write(cmd, 6);
+}
+
+/*
+ * The original code sometimes left the interrupt line of
+ * the ACIAs low forever. I hope, it is fixed now.
+ *
+ * Martin Rogge, 20 Aug 1995
+ */
+
+static int atari_keyb_done = 0;
+
+int __init atari_keyb_init(void)
+{
+        if (atari_keyb_done)
+                return 0;
+
+        /* setup key map */
+        memcpy(key_maps[0], ataplain_map, sizeof(plain_map));
+
+        kb_state.state = KEYBOARD;
+        kb_state.len = 0;
+
+        request_irq(IRQ_MFP_ACIA, atari_keyboard_interrupt, IRQ_TYPE_SLOW,
+                    "keyboard/mouse/MIDI", atari_keyboard_interrupt);
+
+        atari_turnoff_irq(IRQ_MFP_ACIA);
+        do {
+                /* reset IKBD ACIA */
+                acia.key_ctrl = ACIA_RESET |
+                                (atari_switches & ATARI_SWITCH_IKBD) ? ACIA_RHTID : 0;
+                (void)acia.key_ctrl;
+                (void)acia.key_data;
+
+                /* reset MIDI ACIA */
+                acia.mid_ctrl = ACIA_RESET |
+                                (atari_switches & ATARI_SWITCH_MIDI) ? ACIA_RHTID : 0;
+                (void)acia.mid_ctrl;
+                (void)acia.mid_data;
+
+                /* divide 500kHz by 64 gives 7812.5 baud */
+                /* 8 data no parity 1 start 1 stop bit */
+                /* receive interrupt enabled */
+                /* RTS low (except if switch selected), transmit interrupt disabled */
+                acia.key_ctrl = (ACIA_DIV64|ACIA_D8N1S|ACIA_RIE) |
+                                ((atari_switches & ATARI_SWITCH_IKBD) ?
+                                 ACIA_RHTID : ACIA_RLTID);
+
+                acia.mid_ctrl = ACIA_DIV16 | ACIA_D8N1S |
+                                (atari_switches & ATARI_SWITCH_MIDI) ? ACIA_RHTID : 0;
+
+        /* make sure the interrupt line is up */
+        } while ((mfp.par_dt_reg & 0x10) == 0);
+
+        /* enable ACIA Interrupts */
+        mfp.active_edge &= ~0x10;
+        atari_turnon_irq(IRQ_MFP_ACIA);
+
+        ikbd_self_test = 1;
+        ikbd_reset();
+        /* wait for a period of inactivity (here: 0.25s), then assume the IKBD's
+         * self-test is finished */
+        self_test_last_rcv = jiffies;
+        while (time_before(jiffies, self_test_last_rcv + HZ/4))
+                barrier();
+        /* if not incremented: no 0xf1 received */
+        if (ikbd_self_test == 1)
+                printk(KERN_ERR "WARNING: keyboard self test failed!\n");
+        ikbd_self_test = 0;
+
+        ikbd_mouse_disable();
+        ikbd_joystick_disable();
+
+#ifdef FIXED_ATARI_JOYSTICK
+        atari_joystick_init();
+#endif
+
+        // flag init done
+        atari_keyb_done = 1;
+        return 0;
+}
+
+
+int atari_kbdrate(struct kbd_repeat *k)
+{
+        if (k->delay > 0) {
+                /* convert from msec to jiffies */
+                key_repeat_delay = (k->delay * HZ + 500) / 1000;
+                if (key_repeat_delay < 1)
+                        key_repeat_delay = 1;
+        }
+        if (k->period > 0) {
+                key_repeat_rate = (k->period * HZ + 500) / 1000;
+                if (key_repeat_rate < 1)
+                        key_repeat_rate = 1;
+        }
+
+        k->delay  = key_repeat_delay * 1000 / HZ;
+        k->period = key_repeat_rate  * 1000 / HZ;
+
+        return 0;
+}
+
+int atari_kbd_translate(unsigned char keycode, unsigned char *keycodep, char raw_mode)
+{
+#ifdef CONFIG_MAGIC_SYSRQ
+        /* ALT+HELP pressed? */
+        if ((keycode == 98) && ((shift_state & 0xff) == 8))
+                *keycodep = 0xff;
+        else
+#endif
+                *keycodep = keycode;
+        return 1;
+}