| 1 |
1622 |
jcastillo |
/*
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| 2 |
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* linux/arch/arm/drivers/block/keyboard.c
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| 3 |
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*
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| 4 |
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* Keyboard driver for ARM Linux.
|
| 5 |
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*/
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| 6 |
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| 7 |
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#include <linux/config.h>
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| 8 |
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#include <linux/sched.h>
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| 9 |
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#include <linux/interrupt.h>
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| 10 |
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#include <linux/tty.h>
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| 11 |
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#include <linux/tty_flip.h>
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| 12 |
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#include <linux/mm.h>
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| 13 |
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#include <linux/malloc.h>
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| 14 |
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#include <linux/ptrace.h>
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| 15 |
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#include <linux/signal.h>
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| 16 |
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#include <linux/timer.h>
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| 17 |
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#include <linux/random.h>
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| 18 |
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#include <linux/ctype.h>
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| 19 |
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| 20 |
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#include <asm/bitops.h>
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| 21 |
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#include <asm/irq.h>
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| 22 |
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#include <asm/hardware.h>
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| 23 |
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| 24 |
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#include "kbd_kern.h"
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| 25 |
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#include "diacr.h"
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| 26 |
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#include "vt_kern.h"
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| 27 |
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| 28 |
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#define IRQ_KEYBOARDRX 15
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| 29 |
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#define IRQ_KEYBOARDTX 14
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| 30 |
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| 31 |
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extern void kbd_keyboardkey(unsigned int keycode, unsigned int up_flag);
|
| 32 |
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extern void kbd_reset(void);
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| 33 |
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extern void kbd_setregs(struct pt_regs *regs);
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| 34 |
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| 35 |
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#define VERSION 107
|
| 36 |
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|
| 37 |
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#define KBD_REPORT_ERR
|
| 38 |
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#define KBD_REPORT_UNKN
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| 39 |
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|
| 40 |
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#include <asm/io.h>
|
| 41 |
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#include <asm/system.h>
|
| 42 |
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|
| 43 |
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static char kbd_txval;
|
| 44 |
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static int kbd_id = -1;
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| 45 |
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static struct wait_queue *kbd_waitq;
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| 46 |
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| 47 |
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/*
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| 48 |
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* Protocol codes to send the keyboard.
|
| 49 |
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*/
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| 50 |
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#define HRST 0xff /* reset keyboard */
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| 51 |
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#define RAK1 0xfe /* reset response */
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| 52 |
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#define RAK2 0xfd /* reset response */
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| 53 |
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#define BACK 0x3f /* Ack for first keyboard pair */
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| 54 |
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#define SMAK 0x33 /* Last data byte ack (key scanning + mouse movement scanning) */
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| 55 |
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#define MACK 0x32 /* Last data byte ack (mouse movement scanning) */
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| 56 |
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#define SACK 0x31 /* Last data byte ack (key scanning) */
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| 57 |
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#define NACK 0x30 /* Last data byte ack (no scanning, mouse data) */
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| 58 |
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#define RQMP 0x22 /* Request mouse data */
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| 59 |
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#define PRST 0x21 /* nothing */
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| 60 |
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#define RQID 0x20 /* Request ID */
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| 61 |
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| 62 |
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#define UP_FLAG 1
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| 63 |
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|
| 64 |
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/*
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| 65 |
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* This array converts the scancode that we get from the keyboard to the
|
| 66 |
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* real rows/columns on the A5000 keyboard. This might be keyboard specific...
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| 67 |
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*
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| 68 |
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* It is these values that we use to maintain the key down array. That way, we
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| 69 |
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* should pick up on the ghost key presses (which is what happens when you press
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| 70 |
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* three keys, and the keyboard thinks you have pressed four!)
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| 71 |
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*
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| 72 |
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* Row 8 (0x80+c) is actually a column with one key per row. It is isolated from
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| 73 |
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* the other keys, and can't cause these problems (its used for shift, ctrl, alt etc).
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| 74 |
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*
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| 75 |
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* Illegal scancodes are denoted by an 0xff (in other words, we don't know about
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| 76 |
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* them, and can't process them for ghosts). This does however, cause problems with
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| 77 |
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* autorepeat processing...
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| 78 |
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*/
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| 79 |
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static unsigned char scancode_2_colrow[256] = {
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| 80 |
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0x01, 0x42, 0x32, 0x33, 0x43, 0x56, 0x5a, 0x6c, 0x7c, 0x5c, 0x5b, 0x6b, 0x7b, 0x84, 0x70, 0x60,
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| 81 |
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0x11, 0x51, 0x62, 0x63, 0x44, 0x54, 0x55, 0x45, 0x46, 0x4a, 0x3c, 0x4b, 0x59, 0x49, 0x69, 0x79,
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| 82 |
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0x83, 0x40, 0x30, 0x3b, 0x39, 0x38, 0x31, 0x61, 0x72, 0x73, 0x64, 0x74, 0x75, 0x65, 0x66, 0x6a,
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| 83 |
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0x1c, 0x2c, 0x7a, 0x36, 0x48, 0x68, 0x78, 0x20, 0x2b, 0x29, 0x28, 0x81, 0x71, 0x22, 0x23, 0x34,
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| 84 |
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0x24, 0x25, 0x35, 0x26, 0x3a, 0x0c, 0x2a, 0x76, 0x10, 0x1b, 0x19, 0x18, 0x82, 0xff, 0x21, 0x12,
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| 85 |
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0x13, 0x14, 0x04, 0x05, 0x15, 0x16, 0x1a, 0x0a, 0x85, 0x77, 0x00, 0x0b, 0x09, 0x02, 0x80, 0x03,
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| 86 |
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0x87, 0x86, 0x06, 0x17, 0x27, 0x07, 0x37, 0x08, 0xff,
|
| 87 |
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};
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| 88 |
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| 89 |
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#define BITS_PER_SHORT (8*sizeof(unsigned short))
|
| 90 |
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static unsigned short ghost_down[128/BITS_PER_SHORT];
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| 91 |
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| 92 |
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static void kbd_drv_key(unsigned int keycode, unsigned int up_flag)
|
| 93 |
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{
|
| 94 |
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unsigned int real_keycode;
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| 95 |
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|
| 96 |
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if (keycode > 0x72) {
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| 97 |
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#ifdef KBD_REPORT_UNKN
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| 98 |
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printk ("kbd: unknown scancode 0x%04x\n", keycode);
|
| 99 |
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#endif
|
| 100 |
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return;
|
| 101 |
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}
|
| 102 |
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if (keycode >= 0x70) {
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| 103 |
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#ifdef CONFIG_KBDMOUSE
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| 104 |
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unsigned char buttons;
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| 105 |
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switch (keycode) {
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| 106 |
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case 0x70: /* Left mouse button */
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| 107 |
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buttons = add_mouse_buttonchange(4, up_flag ? 4 : 0);
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| 108 |
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break;
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| 109 |
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| 110 |
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case 0x71: /* Middle mouse button */
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| 111 |
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buttons = add_mouse_buttonchange(2, up_flag ? 2 : 0);
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| 112 |
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break;
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| 113 |
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|
| 114 |
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case 0x72:/* Right mouse button */
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| 115 |
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buttons = add_mouse_buttonchange(1, up_flag ? 1 : 0);
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| 116 |
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break;
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| 117 |
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default:
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| 118 |
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buttons = 0;
|
| 119 |
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}
|
| 120 |
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add_mouse_randomness (buttons << 16);
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| 121 |
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#endif
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| 122 |
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return;
|
| 123 |
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}
|
| 124 |
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|
| 125 |
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/*
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| 126 |
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* We have to work out if we accept this key press as a real key, or
|
| 127 |
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* if it is a ghost. IE. If you press three keys, the keyboard will think
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| 128 |
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* that you've pressed a fouth: (@ = key down, # = ghost)
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| 129 |
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*
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| 130 |
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* 0 1 2 3 4 5 6 7
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| 131 |
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* | | | | | | | |
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| 132 |
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* 0-+-+-+-+-+-+-+-+-
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| 133 |
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* | | | | | | | |
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| 134 |
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* 1-+-@-+-+-+-@-+-+-
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| 135 |
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* | | | | | | | |
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| 136 |
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* 2-+-+-+-+-+-+-+-+-
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| 137 |
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* | | | | | | | |
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| 138 |
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* 3-+-@-+-+-+-#-+-+-
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| 139 |
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* | | | | | | | |
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| 140 |
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*
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| 141 |
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* This is what happens when you have a matrix keyboard...
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| 142 |
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*/
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| 143 |
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| 144 |
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real_keycode = scancode_2_colrow[keycode];
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| 145 |
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|
| 146 |
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if ((real_keycode & 0x80) == 0) {
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| 147 |
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int rr, kc = (real_keycode >> 4) & 7;
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| 148 |
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int cc;
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| 149 |
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unsigned short res, kdownkc;
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| 150 |
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| 151 |
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kdownkc = ghost_down[kc] | (1 << (real_keycode & 15));
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| 152 |
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| 153 |
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for (rr = 0; rr < 128/BITS_PER_SHORT; rr++)
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| 154 |
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if (rr != kc && (res = ghost_down[rr] & kdownkc)) {
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| 155 |
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/*
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| 156 |
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* we have found a second row with at least one key pressed in the
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| 157 |
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* same column.
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| 158 |
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*/
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| 159 |
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for (cc = 0; res; res >>= 1)
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| 160 |
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cc += (res & 1);
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| 161 |
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if (cc > 1)
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| 162 |
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return; /* ignore it */
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| 163 |
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}
|
| 164 |
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if (up_flag)
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| 165 |
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clear_bit (real_keycode, ghost_down);
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| 166 |
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else
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| 167 |
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set_bit (real_keycode, ghost_down);
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| 168 |
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}
|
| 169 |
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|
| 170 |
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kbd_keyboardkey(keycode, up_flag);
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| 171 |
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}
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| 172 |
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| 173 |
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static inline void kbd_drv_sendbyte(unsigned char val)
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| 174 |
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{
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| 175 |
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kbd_txval = val;
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| 176 |
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enable_irq(IRQ_KEYBOARDTX);
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| 177 |
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}
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| 178 |
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|
| 179 |
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static inline void kbd_drv_reset(void)
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| 180 |
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{
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| 181 |
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int i;
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| 182 |
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|
| 183 |
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for (i = 0; i < 128/BITS_PER_SHORT; i++)
|
| 184 |
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ghost_down[i] = 0;
|
| 185 |
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|
| 186 |
|
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kbd_reset();
|
| 187 |
|
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}
|
| 188 |
|
|
|
| 189 |
|
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void kbd_drv_setleds(unsigned int leds)
|
| 190 |
|
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{
|
| 191 |
|
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leds = ((leds & (1<<VC_SCROLLOCK))?4:0) | ((leds & (1<<VC_NUMLOCK))?2:0) |
|
| 192 |
|
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((leds & (1<<VC_CAPSLOCK))?1:0);
|
| 193 |
|
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kbd_drv_sendbyte(leds);
|
| 194 |
|
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}
|
| 195 |
|
|
|
| 196 |
|
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/*
|
| 197 |
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* Keyboard states:
|
| 198 |
|
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* 0 initial reset condition, sent HRST, wait for HRST
|
| 199 |
|
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* 1 Send HRST, wait for HRST acknowledge
|
| 200 |
|
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* 2 Sent RAK1, wait for RAK1
|
| 201 |
|
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* 3 Sent RAK2, wait for RAK2
|
| 202 |
|
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* 4 Sent SMAK, wait for anything
|
| 203 |
|
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* 5 Wait for second keyboard nibble for key pressed
|
| 204 |
|
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* 6 Wait for second keyboard nibble for key released
|
| 205 |
|
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* 7 Wait for second part of mouse data
|
| 206 |
|
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*/
|
| 207 |
|
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#define KBD_INITRST 0
|
| 208 |
|
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#define KBD_RAK1 1
|
| 209 |
|
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#define KBD_RAK2 2
|
| 210 |
|
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#define KBD_ID 3
|
| 211 |
|
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#define KBD_IDLE 4
|
| 212 |
|
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#define KBD_KEYDOWN 5
|
| 213 |
|
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#define KBD_KEYUP 6
|
| 214 |
|
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#define KBD_MOUSE 7
|
| 215 |
|
|
|
| 216 |
|
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static int handle_rawcode(unsigned int keyval)
|
| 217 |
|
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{
|
| 218 |
|
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static signed char kbd_mousedx = 0;
|
| 219 |
|
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signed char kbd_mousedy;
|
| 220 |
|
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static unsigned char kbd_state = KBD_INITRST;
|
| 221 |
|
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static unsigned char kbd_keyhigh=0;
|
| 222 |
|
|
|
| 223 |
|
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switch(kbd_state) {
|
| 224 |
|
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case KBD_INITRST: /* hard reset - sent HRST */
|
| 225 |
|
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if (keyval == HRST) {
|
| 226 |
|
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kbd_drv_reset ();
|
| 227 |
|
|
kbd_drv_sendbyte (RAK1);
|
| 228 |
|
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kbd_state = KBD_RAK1;
|
| 229 |
|
|
} else
|
| 230 |
|
|
goto kbd_wontreset;
|
| 231 |
|
|
break;
|
| 232 |
|
|
|
| 233 |
|
|
case KBD_RAK1:/* Sent RAK1 */
|
| 234 |
|
|
switch (keyval) {
|
| 235 |
|
|
case HRST:
|
| 236 |
|
|
kbd_drv_sendbyte (RAK1);
|
| 237 |
|
|
kbd_state = KBD_INITRST;
|
| 238 |
|
|
break;
|
| 239 |
|
|
case RAK1:
|
| 240 |
|
|
kbd_drv_sendbyte (RAK2);
|
| 241 |
|
|
kbd_state = KBD_RAK2;
|
| 242 |
|
|
break;
|
| 243 |
|
|
default:
|
| 244 |
|
|
goto kbd_wontreset;
|
| 245 |
|
|
}
|
| 246 |
|
|
break;
|
| 247 |
|
|
|
| 248 |
|
|
case KBD_RAK2:/* Sent RAK2 */
|
| 249 |
|
|
switch (keyval) {
|
| 250 |
|
|
case HRST:
|
| 251 |
|
|
kbd_drv_sendbyte (HRST);
|
| 252 |
|
|
kbd_state = KBD_INITRST;
|
| 253 |
|
|
break;
|
| 254 |
|
|
case RAK2:
|
| 255 |
|
|
if (kbd_id == -1) {
|
| 256 |
|
|
kbd_drv_sendbyte (NACK);
|
| 257 |
|
|
kbd_drv_sendbyte (RQID);
|
| 258 |
|
|
kbd_state = KBD_ID;
|
| 259 |
|
|
} else {
|
| 260 |
|
|
kbd_drv_sendbyte (SMAK);
|
| 261 |
|
|
kbd_state = KBD_IDLE;
|
| 262 |
|
|
}
|
| 263 |
|
|
break;
|
| 264 |
|
|
default:
|
| 265 |
|
|
goto kbd_wontreset;
|
| 266 |
|
|
}
|
| 267 |
|
|
break;
|
| 268 |
|
|
|
| 269 |
|
|
case KBD_ID:
|
| 270 |
|
|
if (keyval == HRST) {
|
| 271 |
|
|
kbd_drv_sendbyte (HRST);
|
| 272 |
|
|
kbd_state = KBD_INITRST;
|
| 273 |
|
|
kbd_id = -2;
|
| 274 |
|
|
wake_up(&kbd_waitq);
|
| 275 |
|
|
break;
|
| 276 |
|
|
} else
|
| 277 |
|
|
if ((keyval & 0xc0) == 0x80) {
|
| 278 |
|
|
kbd_id = keyval & 0x3f;
|
| 279 |
|
|
kbd_drv_sendbyte (SMAK);
|
| 280 |
|
|
kbd_state = KBD_IDLE;
|
| 281 |
|
|
wake_up(&kbd_waitq);
|
| 282 |
|
|
break;
|
| 283 |
|
|
}
|
| 284 |
|
|
break;
|
| 285 |
|
|
|
| 286 |
|
|
case KBD_IDLE:/* Send SMAK, ready for any reply */
|
| 287 |
|
|
if (keyval == HRST) {
|
| 288 |
|
|
kbd_drv_sendbyte (HRST);
|
| 289 |
|
|
kbd_state = KBD_INITRST;
|
| 290 |
|
|
} else
|
| 291 |
|
|
if (keyval & 0x80) {
|
| 292 |
|
|
if (!(keyval & 0x40)) {
|
| 293 |
|
|
if (kbd_id == -1)
|
| 294 |
|
|
kbd_id = keyval & 0x3f;
|
| 295 |
|
|
else {
|
| 296 |
|
|
kbd_state = KBD_INITRST;
|
| 297 |
|
|
kbd_drv_sendbyte (HRST);
|
| 298 |
|
|
}
|
| 299 |
|
|
break;
|
| 300 |
|
|
}
|
| 301 |
|
|
switch (keyval & 0xf0) {
|
| 302 |
|
|
case 0xc0:
|
| 303 |
|
|
kbd_keyhigh = keyval;
|
| 304 |
|
|
kbd_state = KBD_KEYDOWN;
|
| 305 |
|
|
kbd_drv_sendbyte (BACK);
|
| 306 |
|
|
break;
|
| 307 |
|
|
|
| 308 |
|
|
case 0xd0:
|
| 309 |
|
|
kbd_keyhigh = keyval;
|
| 310 |
|
|
kbd_state = KBD_KEYUP;
|
| 311 |
|
|
kbd_drv_sendbyte (BACK);
|
| 312 |
|
|
break;
|
| 313 |
|
|
|
| 314 |
|
|
default:
|
| 315 |
|
|
kbd_state = KBD_INITRST;
|
| 316 |
|
|
kbd_drv_sendbyte (HRST);
|
| 317 |
|
|
}
|
| 318 |
|
|
} else {
|
| 319 |
|
|
kbd_mousedx = keyval & 0x40 ? keyval|0x80 : keyval;
|
| 320 |
|
|
kbd_state = KBD_MOUSE;
|
| 321 |
|
|
kbd_drv_sendbyte (BACK);
|
| 322 |
|
|
}
|
| 323 |
|
|
break;
|
| 324 |
|
|
|
| 325 |
|
|
case KBD_KEYDOWN:
|
| 326 |
|
|
if ((keyval & 0xf0) != 0xc0)
|
| 327 |
|
|
goto kbd_error;
|
| 328 |
|
|
else {
|
| 329 |
|
|
kbd_state = KBD_IDLE;
|
| 330 |
|
|
kbd_drv_sendbyte (SMAK);
|
| 331 |
|
|
if (((kbd_keyhigh ^ keyval) & 0xf0) == 0)
|
| 332 |
|
|
kbd_drv_key ((keyval & 0x0f) | ((kbd_keyhigh << 4) & 0xf0), 0);
|
| 333 |
|
|
return 1;
|
| 334 |
|
|
}
|
| 335 |
|
|
break;
|
| 336 |
|
|
|
| 337 |
|
|
case KBD_KEYUP:
|
| 338 |
|
|
if ((keyval & 0xf0) != 0xd0)
|
| 339 |
|
|
goto kbd_error;
|
| 340 |
|
|
else {
|
| 341 |
|
|
kbd_state = KBD_IDLE;
|
| 342 |
|
|
kbd_drv_sendbyte (SMAK);
|
| 343 |
|
|
if (((kbd_keyhigh ^ keyval) & 0xf0) == 0)
|
| 344 |
|
|
kbd_drv_key ((keyval & 0x0f) | ((kbd_keyhigh << 4) & 0xf0), UP_FLAG);
|
| 345 |
|
|
return 1;
|
| 346 |
|
|
}
|
| 347 |
|
|
break;
|
| 348 |
|
|
|
| 349 |
|
|
case KBD_MOUSE:
|
| 350 |
|
|
if (keyval & 0x80)
|
| 351 |
|
|
goto kbd_error;
|
| 352 |
|
|
else {
|
| 353 |
|
|
kbd_state = KBD_IDLE;
|
| 354 |
|
|
kbd_drv_sendbyte (SMAK);
|
| 355 |
|
|
kbd_mousedy = (char)(keyval & 0x40 ? keyval | 0x80 : keyval);
|
| 356 |
|
|
#ifdef CONFIG_KBDMOUSE
|
| 357 |
|
|
add_mouse_movement((int)kbd_mousedx, (int)kbd_mousedy);
|
| 358 |
|
|
add_mouse_randomness((kbd_mousedy << 8) + kbd_mousedx);
|
| 359 |
|
|
#endif
|
| 360 |
|
|
}
|
| 361 |
|
|
return 1;
|
| 362 |
|
|
}
|
| 363 |
|
|
return 0;
|
| 364 |
|
|
|
| 365 |
|
|
kbd_wontreset:
|
| 366 |
|
|
#ifdef KBD_REPORT_ERR
|
| 367 |
|
|
printk ("kbd: keyboard won't reset (kbdstate %d, keyval %02X)\n",
|
| 368 |
|
|
kbd_state, keyval);
|
| 369 |
|
|
#endif
|
| 370 |
|
|
kbd_drv_sendbyte (HRST);
|
| 371 |
|
|
kbd_state = KBD_INITRST;
|
| 372 |
|
|
return 0;
|
| 373 |
|
|
|
| 374 |
|
|
kbd_error:
|
| 375 |
|
|
#ifdef KBD_REPORT_ERR
|
| 376 |
|
|
printk ("kbd: keyboard out of sync - resetting\n");
|
| 377 |
|
|
#endif
|
| 378 |
|
|
kbd_drv_sendbyte (HRST);
|
| 379 |
|
|
kbd_state = KBD_INITRST;
|
| 380 |
|
|
return 0;
|
| 381 |
|
|
}
|
| 382 |
|
|
|
| 383 |
|
|
static void kbd_drv_rx(int irq, void *dev_id, struct pt_regs *regs)
|
| 384 |
|
|
{
|
| 385 |
|
|
if (handle_rawcode(inb(IOC_KARTRX)))
|
| 386 |
|
|
mark_bh (KEYBOARD_BH);
|
| 387 |
|
|
kbd_setregs(regs);
|
| 388 |
|
|
}
|
| 389 |
|
|
|
| 390 |
|
|
static void kbd_drv_tx(int irq, void *dev_id, struct pt_regs *regs)
|
| 391 |
|
|
{
|
| 392 |
|
|
outb (kbd_txval, IOC_KARTTX);
|
| 393 |
|
|
}
|
| 394 |
|
|
|
| 395 |
|
|
int kbd_drv_init (void)
|
| 396 |
|
|
{
|
| 397 |
|
|
unsigned long flags;
|
| 398 |
|
|
|
| 399 |
|
|
save_flags_cli (flags);
|
| 400 |
|
|
if (request_irq (IRQ_KEYBOARDRX, kbd_drv_rx, 0, "keyboard", NULL) != 0)
|
| 401 |
|
|
panic("Could not allocate keyboard receive IRQ!");
|
| 402 |
|
|
if (request_irq (IRQ_KEYBOARDTX, kbd_drv_tx, 0, "keyboard", NULL) != 0)
|
| 403 |
|
|
panic("Could not allocate keyboard transmit IRQ!");
|
| 404 |
|
|
disable_irq (IRQ_KEYBOARDTX);
|
| 405 |
|
|
(void)inb(IOC_KARTRX);
|
| 406 |
|
|
restore_flags (flags);
|
| 407 |
|
|
|
| 408 |
|
|
kbd_drv_sendbyte (HRST);
|
| 409 |
|
|
|
| 410 |
|
|
current->timeout = jiffies + HZ; /* wait 1s for keyboard to initialise */
|
| 411 |
|
|
interruptible_sleep_on(&kbd_waitq);
|
| 412 |
|
|
|
| 413 |
|
|
printk (KERN_INFO "Keyboard driver v%d.%02d. (", VERSION/100, VERSION%100);
|
| 414 |
|
|
if (kbd_id != -1)
|
| 415 |
|
|
printk ("id=%d ", kbd_id);
|
| 416 |
|
|
printk ("English)\n");
|
| 417 |
|
|
return 0;
|
| 418 |
|
|
}
|
