![Daniel Mack](/assets/img/avatar_default.png)
In particular, several occurances of funny versions of 'success', 'unknown', 'therefore', 'acknowledge', 'argument', 'achieve', 'address', 'beginning', 'desirable', 'separate' and 'necessary' are fixed. Signed-off-by: Daniel Mack <daniel@caiaq.de> Cc: Joe Perches <joe@perches.com> Cc: Junio C Hamano <gitster@pobox.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
642 lines
16 KiB
C
642 lines
16 KiB
C
/*
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* Atari Keyboard driver for 680x0 Linux
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive
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* for more details.
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*/
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/*
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* Atari support by Robert de Vries
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* enhanced by Bjoern Brauel and Roman Hodek
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*
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* 2.6 and input cleanup (removed autorepeat stuff) for 2.6.21
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* 06/07 Michael Schmitz
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*/
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/interrupt.h>
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#include <linux/errno.h>
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#include <linux/keyboard.h>
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#include <linux/delay.h>
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#include <linux/timer.h>
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#include <linux/kd.h>
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#include <linux/random.h>
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#include <linux/init.h>
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#include <linux/kbd_kern.h>
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#include <asm/atariints.h>
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#include <asm/atarihw.h>
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#include <asm/atarikb.h>
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#include <asm/atari_joystick.h>
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#include <asm/irq.h>
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/* Hook for MIDI serial driver */
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void (*atari_MIDI_interrupt_hook) (void);
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/* Hook for mouse driver */
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void (*atari_mouse_interrupt_hook) (char *);
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/* Hook for keyboard inputdev driver */
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void (*atari_input_keyboard_interrupt_hook) (unsigned char, char);
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/* Hook for mouse inputdev driver */
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void (*atari_input_mouse_interrupt_hook) (char *);
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EXPORT_SYMBOL(atari_mouse_interrupt_hook);
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EXPORT_SYMBOL(atari_input_keyboard_interrupt_hook);
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EXPORT_SYMBOL(atari_input_mouse_interrupt_hook);
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/* variables for IKBD self test: */
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/* state: 0: off; >0: in progress; >1: 0xf1 received */
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static volatile int ikbd_self_test;
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/* timestamp when last received a char */
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static volatile unsigned long self_test_last_rcv;
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/* bitmap of keys reported as broken */
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static unsigned long broken_keys[128/(sizeof(unsigned long)*8)] = { 0, };
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#define BREAK_MASK (0x80)
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/*
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* ++roman: The following changes were applied manually:
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*
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* - The Alt (= Meta) key works in combination with Shift and
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* Control, e.g. Alt+Shift+a sends Meta-A (0xc1), Alt+Control+A sends
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* Meta-Ctrl-A (0x81) ...
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*
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* - The parentheses on the keypad send '(' and ')' with all
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* modifiers (as would do e.g. keypad '+'), but they cannot be used as
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* application keys (i.e. sending Esc O c).
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*
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* - HELP and UNDO are mapped to be F21 and F24, resp, that send the
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* codes "\E[M" and "\E[P". (This is better than the old mapping to
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* F11 and F12, because these codes are on Shift+F1/2 anyway.) This
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* way, applications that allow their own keyboard mappings
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* (e.g. tcsh, X Windows) can be configured to use them in the way
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* the label suggests (providing help or undoing).
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*
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* - Console switching is done with Alt+Fx (consoles 1..10) and
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* Shift+Alt+Fx (consoles 11..20).
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*
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* - The misc. special function implemented in the kernel are mapped
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* to the following key combinations:
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*
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* ClrHome -> Home/Find
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* Shift + ClrHome -> End/Select
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* Shift + Up -> Page Up
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* Shift + Down -> Page Down
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* Alt + Help -> show system status
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* Shift + Help -> show memory info
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* Ctrl + Help -> show registers
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* Ctrl + Alt + Del -> Reboot
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* Alt + Undo -> switch to last console
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* Shift + Undo -> send interrupt
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* Alt + Insert -> stop/start output (same as ^S/^Q)
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* Alt + Up -> Scroll back console (if implemented)
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* Alt + Down -> Scroll forward console (if implemented)
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* Alt + CapsLock -> NumLock
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*
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* ++Andreas:
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*
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* - Help mapped to K_HELP
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* - Undo mapped to K_UNDO (= K_F246)
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* - Keypad Left/Right Parenthesis mapped to new K_PPAREN[LR]
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*/
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typedef enum kb_state_t {
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KEYBOARD, AMOUSE, RMOUSE, JOYSTICK, CLOCK, RESYNC
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} KB_STATE_T;
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#define IS_SYNC_CODE(sc) ((sc) >= 0x04 && (sc) <= 0xfb)
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typedef struct keyboard_state {
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unsigned char buf[6];
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int len;
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KB_STATE_T state;
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} KEYBOARD_STATE;
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KEYBOARD_STATE kb_state;
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/* ++roman: If a keyboard overrun happened, we can't tell in general how much
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* bytes have been lost and in which state of the packet structure we are now.
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* This usually causes keyboards bytes to be interpreted as mouse movements
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* and vice versa, which is very annoying. It seems better to throw away some
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* bytes (that are usually mouse bytes) than to misinterpret them. Therefore I
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* introduced the RESYNC state for IKBD data. In this state, the bytes up to
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* one that really looks like a key event (0x04..0xf2) or the start of a mouse
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* packet (0xf8..0xfb) are thrown away, but at most 2 bytes. This at least
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* speeds up the resynchronization of the event structure, even if maybe a
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* mouse movement is lost. However, nothing is perfect. For bytes 0x01..0x03,
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* it's really hard to decide whether they're mouse or keyboard bytes. Since
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* overruns usually occur when moving the Atari mouse rapidly, they're seen as
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* mouse bytes here. If this is wrong, only a make code of the keyboard gets
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* lost, which isn't too bad. Loosing a break code would be disastrous,
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* because then the keyboard repeat strikes...
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*/
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static irqreturn_t atari_keyboard_interrupt(int irq, void *dummy)
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{
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u_char acia_stat;
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int scancode;
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int break_flag;
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repeat:
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if (acia.mid_ctrl & ACIA_IRQ)
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if (atari_MIDI_interrupt_hook)
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atari_MIDI_interrupt_hook();
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acia_stat = acia.key_ctrl;
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/* check out if the interrupt came from this ACIA */
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if (!((acia_stat | acia.mid_ctrl) & ACIA_IRQ))
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return IRQ_HANDLED;
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if (acia_stat & ACIA_OVRN) {
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/* a very fast typist or a slow system, give a warning */
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/* ...happens often if interrupts were disabled for too long */
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printk(KERN_DEBUG "Keyboard overrun\n");
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scancode = acia.key_data;
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if (ikbd_self_test)
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/* During self test, don't do resyncing, just process the code */
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goto interpret_scancode;
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else if (IS_SYNC_CODE(scancode)) {
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/* This code seem already to be the start of a new packet or a
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* single scancode */
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kb_state.state = KEYBOARD;
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goto interpret_scancode;
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} else {
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/* Go to RESYNC state and skip this byte */
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kb_state.state = RESYNC;
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kb_state.len = 1; /* skip max. 1 another byte */
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goto repeat;
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}
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}
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if (acia_stat & ACIA_RDRF) {
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/* received a character */
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scancode = acia.key_data; /* get it or reset the ACIA, I'll get it! */
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tasklet_schedule(&keyboard_tasklet);
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interpret_scancode:
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switch (kb_state.state) {
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case KEYBOARD:
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switch (scancode) {
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case 0xF7:
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kb_state.state = AMOUSE;
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kb_state.len = 0;
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break;
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case 0xF8:
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case 0xF9:
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case 0xFA:
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case 0xFB:
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kb_state.state = RMOUSE;
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kb_state.len = 1;
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kb_state.buf[0] = scancode;
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break;
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case 0xFC:
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kb_state.state = CLOCK;
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kb_state.len = 0;
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break;
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case 0xFE:
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case 0xFF:
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kb_state.state = JOYSTICK;
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kb_state.len = 1;
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kb_state.buf[0] = scancode;
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break;
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case 0xF1:
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/* during self-test, note that 0xf1 received */
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if (ikbd_self_test) {
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++ikbd_self_test;
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self_test_last_rcv = jiffies;
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break;
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}
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/* FALL THROUGH */
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default:
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break_flag = scancode & BREAK_MASK;
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scancode &= ~BREAK_MASK;
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if (ikbd_self_test) {
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/* Scancodes sent during the self-test stand for broken
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* keys (keys being down). The code *should* be a break
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* code, but nevertheless some AT keyboard interfaces send
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* make codes instead. Therefore, simply ignore
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* break_flag...
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*/
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int keyval, keytyp;
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set_bit(scancode, broken_keys);
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self_test_last_rcv = jiffies;
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/* new Linux scancodes; approx. */
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keyval = scancode;
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keytyp = KTYP(keyval) - 0xf0;
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keyval = KVAL(keyval);
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printk(KERN_WARNING "Key with scancode %d ", scancode);
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if (keytyp == KT_LATIN || keytyp == KT_LETTER) {
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if (keyval < ' ')
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printk("('^%c') ", keyval + '@');
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else
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printk("('%c') ", keyval);
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}
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printk("is broken -- will be ignored.\n");
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break;
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} else if (test_bit(scancode, broken_keys))
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break;
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if (atari_input_keyboard_interrupt_hook)
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atari_input_keyboard_interrupt_hook((unsigned char)scancode, !break_flag);
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break;
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}
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break;
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case AMOUSE:
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kb_state.buf[kb_state.len++] = scancode;
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if (kb_state.len == 5) {
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kb_state.state = KEYBOARD;
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/* not yet used */
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/* wake up someone waiting for this */
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}
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break;
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case RMOUSE:
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kb_state.buf[kb_state.len++] = scancode;
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if (kb_state.len == 3) {
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kb_state.state = KEYBOARD;
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if (atari_mouse_interrupt_hook)
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atari_mouse_interrupt_hook(kb_state.buf);
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}
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break;
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case JOYSTICK:
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kb_state.buf[1] = scancode;
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kb_state.state = KEYBOARD;
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#ifdef FIXED_ATARI_JOYSTICK
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atari_joystick_interrupt(kb_state.buf);
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#endif
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break;
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case CLOCK:
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kb_state.buf[kb_state.len++] = scancode;
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if (kb_state.len == 6) {
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kb_state.state = KEYBOARD;
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/* wake up someone waiting for this.
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But will this ever be used, as Linux keeps its own time.
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Perhaps for synchronization purposes? */
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/* wake_up_interruptible(&clock_wait); */
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}
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break;
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case RESYNC:
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if (kb_state.len <= 0 || IS_SYNC_CODE(scancode)) {
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kb_state.state = KEYBOARD;
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goto interpret_scancode;
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}
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kb_state.len--;
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break;
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}
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}
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#if 0
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if (acia_stat & ACIA_CTS)
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/* cannot happen */;
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#endif
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if (acia_stat & (ACIA_FE | ACIA_PE)) {
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printk("Error in keyboard communication\n");
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}
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/* handle_scancode() can take a lot of time, so check again if
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* some character arrived
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*/
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goto repeat;
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}
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/*
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* I write to the keyboard without using interrupts, I poll instead.
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* This takes for the maximum length string allowed (7) at 7812.5 baud
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* 8 data 1 start 1 stop bit: 9.0 ms
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* If this takes too long for normal operation, interrupt driven writing
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* is the solution. (I made a feeble attempt in that direction but I
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* kept it simple for now.)
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*/
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void ikbd_write(const char *str, int len)
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{
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u_char acia_stat;
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if ((len < 1) || (len > 7))
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panic("ikbd: maximum string length exceeded");
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while (len) {
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acia_stat = acia.key_ctrl;
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if (acia_stat & ACIA_TDRE) {
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acia.key_data = *str++;
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len--;
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}
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}
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}
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/* Reset (without touching the clock) */
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void ikbd_reset(void)
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{
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static const char cmd[2] = { 0x80, 0x01 };
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ikbd_write(cmd, 2);
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/*
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* if all's well code 0xF1 is returned, else the break codes of
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* all keys making contact
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*/
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}
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/* Set mouse button action */
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void ikbd_mouse_button_action(int mode)
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{
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char cmd[2] = { 0x07, mode };
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ikbd_write(cmd, 2);
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}
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/* Set relative mouse position reporting */
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void ikbd_mouse_rel_pos(void)
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{
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static const char cmd[1] = { 0x08 };
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ikbd_write(cmd, 1);
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}
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EXPORT_SYMBOL(ikbd_mouse_rel_pos);
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/* Set absolute mouse position reporting */
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void ikbd_mouse_abs_pos(int xmax, int ymax)
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{
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char cmd[5] = { 0x09, xmax>>8, xmax&0xFF, ymax>>8, ymax&0xFF };
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ikbd_write(cmd, 5);
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}
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/* Set mouse keycode mode */
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void ikbd_mouse_kbd_mode(int dx, int dy)
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{
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char cmd[3] = { 0x0A, dx, dy };
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ikbd_write(cmd, 3);
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}
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/* Set mouse threshold */
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void ikbd_mouse_thresh(int x, int y)
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{
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char cmd[3] = { 0x0B, x, y };
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ikbd_write(cmd, 3);
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}
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EXPORT_SYMBOL(ikbd_mouse_thresh);
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/* Set mouse scale */
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void ikbd_mouse_scale(int x, int y)
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{
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char cmd[3] = { 0x0C, x, y };
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ikbd_write(cmd, 3);
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}
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/* Interrogate mouse position */
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void ikbd_mouse_pos_get(int *x, int *y)
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{
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static const char cmd[1] = { 0x0D };
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ikbd_write(cmd, 1);
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/* wait for returning bytes */
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}
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/* Load mouse position */
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void ikbd_mouse_pos_set(int x, int y)
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{
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char cmd[6] = { 0x0E, 0x00, x>>8, x&0xFF, y>>8, y&0xFF };
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ikbd_write(cmd, 6);
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}
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/* Set Y=0 at bottom */
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void ikbd_mouse_y0_bot(void)
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{
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static const char cmd[1] = { 0x0F };
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ikbd_write(cmd, 1);
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}
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/* Set Y=0 at top */
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void ikbd_mouse_y0_top(void)
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{
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static const char cmd[1] = { 0x10 };
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ikbd_write(cmd, 1);
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}
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EXPORT_SYMBOL(ikbd_mouse_y0_top);
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/* Resume */
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void ikbd_resume(void)
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{
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static const char cmd[1] = { 0x11 };
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ikbd_write(cmd, 1);
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}
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/* Disable mouse */
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void ikbd_mouse_disable(void)
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{
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static const char cmd[1] = { 0x12 };
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ikbd_write(cmd, 1);
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}
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EXPORT_SYMBOL(ikbd_mouse_disable);
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/* Pause output */
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void ikbd_pause(void)
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{
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static const char cmd[1] = { 0x13 };
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ikbd_write(cmd, 1);
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}
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/* Set joystick event reporting */
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void ikbd_joystick_event_on(void)
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{
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static const char cmd[1] = { 0x14 };
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ikbd_write(cmd, 1);
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}
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/* Set joystick interrogation mode */
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void ikbd_joystick_event_off(void)
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{
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static const char cmd[1] = { 0x15 };
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ikbd_write(cmd, 1);
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}
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/* Joystick interrogation */
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void ikbd_joystick_get_state(void)
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{
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static const char cmd[1] = { 0x16 };
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ikbd_write(cmd, 1);
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}
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#if 0
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/* This disables all other ikbd activities !!!! */
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/* Set joystick monitoring */
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void ikbd_joystick_monitor(int rate)
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{
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static const char cmd[2] = { 0x17, rate };
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ikbd_write(cmd, 2);
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kb_state.state = JOYSTICK_MONITOR;
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}
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#endif
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/* some joystick routines not in yet (0x18-0x19) */
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/* Disable joysticks */
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void ikbd_joystick_disable(void)
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{
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static const char cmd[1] = { 0x1A };
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ikbd_write(cmd, 1);
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}
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/* Time-of-day clock set */
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void ikbd_clock_set(int year, int month, int day, int hour, int minute, int second)
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{
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char cmd[7] = { 0x1B, year, month, day, hour, minute, second };
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ikbd_write(cmd, 7);
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}
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/* Interrogate time-of-day clock */
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void ikbd_clock_get(int *year, int *month, int *day, int *hour, int *minute, int second)
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{
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static const char cmd[1] = { 0x1C };
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ikbd_write(cmd, 1);
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}
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|
/* 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 atari_keyb_init(void)
|
|
{
|
|
int error;
|
|
|
|
if (atari_keyb_done)
|
|
return 0;
|
|
|
|
kb_state.state = KEYBOARD;
|
|
kb_state.len = 0;
|
|
|
|
error = request_irq(IRQ_MFP_ACIA, atari_keyboard_interrupt,
|
|
IRQ_TYPE_SLOW, "keyboard/mouse/MIDI",
|
|
atari_keyboard_interrupt);
|
|
if (error)
|
|
return error;
|
|
|
|
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 ((st_mfp.par_dt_reg & 0x10) == 0);
|
|
|
|
/* enable ACIA Interrupts */
|
|
st_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;
|
|
}
|
|
EXPORT_SYMBOL_GPL(atari_keyb_init);
|