adbhid.c

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/*
 * drivers/macintosh/adbhid.c
 *
 * ADB HID driver for Power Macintosh computers.
 *
 * Adapted from drivers/macintosh/mac_keyb.c by Franz Sirl.
 * drivers/macintosh/mac_keyb.c was Copyright (C) 1996 Paul Mackerras
 * with considerable contributions from Ben Herrenschmidt and others.
 *
 * Copyright (C) 2000 Franz Sirl.
 *
 * Adapted to ADB changes and support for more devices by
 * Benjamin Herrenschmidt. Adapted from code in MkLinux
 * and reworked.
 * 
 * Supported devices:
 *
 * - Standard 1 button mouse
 * - All standard Apple Extended protocol (handler ID 4)
 * - mouseman and trackman mice & trackballs 
 * - PowerBook Trackpad (default setup: enable tapping)
 * - MicroSpeed mouse & trackball (needs testing)
 * - CH Products Trackball Pro (needs testing)
 * - Contour Design (Contour Mouse)
 * - Hunter digital (NoHandsMouse)
 * - Kensignton TurboMouse 5 (needs testing)
 * - Mouse Systems A3 mice and trackballs <[e-mail]>
 * - MacAlly 2-buttons mouse (needs testing) <[e-mail]>
 *
 * To do:
 *
 * Improve Kensington support.
 * Split mouse/kbd
 * Move to syfs
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/notifier.h>
#include <linux/input.h>

#include <linux/adb.h>
#include <linux/cuda.h>
#include <linux/pmu.h>

#include <asm/machdep.h>
#ifdef CONFIG_PPC_PMAC
#include <asm/backlight.h>
#include <asm/pmac_feature.h>
#endif

MODULE_AUTHOR("Franz Sirl <[e-mail]>");

static int restore_capslock_events;
module_param(restore_capslock_events, int, 0644);
MODULE_PARM_DESC(restore_capslock_events,
	"Produce keypress events for capslock on both keyup and keydown.");

#define KEYB_KEYREG	0	/* register # for key up/down data */
#define KEYB_LEDREG	2	/* register # for leds on ADB keyboard */
#define MOUSE_DATAREG	0	/* reg# for movement/button codes from mouse */

static int adb_message_handler(struct notifier_block *, unsigned long, void *);
static struct notifier_block adbhid_adb_notifier = {
	.notifier_call	= adb_message_handler,
};

/* Some special keys */
#define ADB_KEY_DEL		0x33
#define ADB_KEY_CMD		0x37
#define ADB_KEY_CAPSLOCK	0x39
#define ADB_KEY_FN		0x3f
#define ADB_KEY_FWDEL		0x75
#define ADB_KEY_POWER_OLD	0x7e
#define ADB_KEY_POWER		0x7f

u16 adb_to_linux_keycodes[128] = {
	/* 0x00 */ KEY_A, 		/*  30 */
	/* 0x01 */ KEY_S, 		/*  31 */
	/* 0x02 */ KEY_D,		/*  32 */
	/* 0x03 */ KEY_F,		/*  33 */
	/* 0x04 */ KEY_H,		/*  35 */
	/* 0x05 */ KEY_G,		/*  34 */
	/* 0x06 */ KEY_Z,		/*  44 */
	/* 0x07 */ KEY_X,		/*  45 */
	/* 0x08 */ KEY_C,		/*  46 */
	/* 0x09 */ KEY_V,		/*  47 */
	/* 0x0a */ KEY_102ND,		/*  86 */
	/* 0x0b */ KEY_B,		/*  48 */
	/* 0x0c */ KEY_Q,		/*  16 */
	/* 0x0d */ KEY_W,		/*  17 */
	/* 0x0e */ KEY_E,		/*  18 */
	/* 0x0f */ KEY_R,		/*  19 */
	/* 0x10 */ KEY_Y,		/*  21 */
	/* 0x11 */ KEY_T,		/*  20 */
	/* 0x12 */ KEY_1,		/*   2 */
	/* 0x13 */ KEY_2,		/*   3 */
	/* 0x14 */ KEY_3,		/*   4 */
	/* 0x15 */ KEY_4,		/*   5 */
	/* 0x16 */ KEY_6,		/*   7 */
	/* 0x17 */ KEY_5,		/*   6 */
	/* 0x18 */ KEY_EQUAL,		/*  13 */
	/* 0x19 */ KEY_9,		/*  10 */
	/* 0x1a */ KEY_7,		/*   8 */
	/* 0x1b */ KEY_MINUS,		/*  12 */
	/* 0x1c */ KEY_8,		/*   9 */
	/* 0x1d */ KEY_0,		/*  11 */
	/* 0x1e */ KEY_RIGHTBRACE,	/*  27 */
	/* 0x1f */ KEY_O,		/*  24 */
	/* 0x20 */ KEY_U,		/*  22 */
	/* 0x21 */ KEY_LEFTBRACE,	/*  26 */
	/* 0x22 */ KEY_I,		/*  23 */
	/* 0x23 */ KEY_P,		/*  25 */
	/* 0x24 */ KEY_ENTER,		/*  28 */
	/* 0x25 */ KEY_L,		/*  38 */
	/* 0x26 */ KEY_J,		/*  36 */
	/* 0x27 */ KEY_APOSTROPHE,	/*  40 */
	/* 0x28 */ KEY_K,		/*  37 */
	/* 0x29 */ KEY_SEMICOLON,	/*  39 */
	/* 0x2a */ KEY_BACKSLASH,	/*  43 */
	/* 0x2b */ KEY_COMMA,		/*  51 */
	/* 0x2c */ KEY_SLASH,		/*  53 */
	/* 0x2d */ KEY_N,		/*  49 */
	/* 0x2e */ KEY_M,		/*  50 */
	/* 0x2f */ KEY_DOT,		/*  52 */
	/* 0x30 */ KEY_TAB,		/*  15 */
	/* 0x31 */ KEY_SPACE,		/*  57 */
	/* 0x32 */ KEY_GRAVE,		/*  41 */
	/* 0x33 */ KEY_BACKSPACE,	/*  14 */
	/* 0x34 */ KEY_KPENTER,		/*  96 */
	/* 0x35 */ KEY_ESC,		/*   1 */
	/* 0x36 */ KEY_LEFTCTRL,	/*  29 */
	/* 0x37 */ KEY_LEFTMETA,	/* 125 */
	/* 0x38 */ KEY_LEFTSHIFT,	/*  42 */
	/* 0x39 */ KEY_CAPSLOCK,	/*  58 */
	/* 0x3a */ KEY_LEFTALT,		/*  56 */
	/* 0x3b */ KEY_LEFT,		/* 105 */
	/* 0x3c */ KEY_RIGHT,		/* 106 */
	/* 0x3d */ KEY_DOWN,		/* 108 */
	/* 0x3e */ KEY_UP,		/* 103 */
	/* 0x3f */ KEY_FN,		/* 0x1d0 */
	/* 0x40 */ 0,
	/* 0x41 */ KEY_KPDOT,		/*  83 */
	/* 0x42 */ 0,
	/* 0x43 */ KEY_KPASTERISK,	/*  55 */
	/* 0x44 */ 0,
	/* 0x45 */ KEY_KPPLUS,		/*  78 */
	/* 0x46 */ 0,
	/* 0x47 */ KEY_NUMLOCK,		/*  69 */
	/* 0x48 */ 0,
	/* 0x49 */ 0,
	/* 0x4a */ 0,
	/* 0x4b */ KEY_KPSLASH,		/*  98 */
	/* 0x4c */ KEY_KPENTER,		/*  96 */
	/* 0x4d */ 0,
	/* 0x4e */ KEY_KPMINUS,		/*  74 */
	/* 0x4f */ 0,
	/* 0x50 */ 0,
	/* 0x51 */ KEY_KPEQUAL,		/* 117 */
	/* 0x52 */ KEY_KP0,		/*  82 */
	/* 0x53 */ KEY_KP1,		/*  79 */
	/* 0x54 */ KEY_KP2,		/*  80 */
	/* 0x55 */ KEY_KP3,		/*  81 */
	/* 0x56 */ KEY_KP4,		/*  75 */
	/* 0x57 */ KEY_KP5,		/*  76 */
	/* 0x58 */ KEY_KP6,		/*  77 */
	/* 0x59 */ KEY_KP7,		/*  71 */
	/* 0x5a */ 0,
	/* 0x5b */ KEY_KP8,		/*  72 */
	/* 0x5c */ KEY_KP9,		/*  73 */
	/* 0x5d */ KEY_YEN,		/* 124 */
	/* 0x5e */ KEY_RO,		/*  89 */
	/* 0x5f */ KEY_KPCOMMA,		/* 121 */
	/* 0x60 */ KEY_F5,		/*  63 */
	/* 0x61 */ KEY_F6,		/*  64 */
	/* 0x62 */ KEY_F7,		/*  65 */
	/* 0x63 */ KEY_F3,		/*  61 */
	/* 0x64 */ KEY_F8,		/*  66 */
	/* 0x65 */ KEY_F9,		/*  67 */
	/* 0x66 */ KEY_HANJA,		/* 123 */
	/* 0x67 */ KEY_F11,		/*  87 */
	/* 0x68 */ KEY_HANGEUL,		/* 122 */
	/* 0x69 */ KEY_SYSRQ,		/*  99 */
	/* 0x6a */ 0,
	/* 0x6b */ KEY_SCROLLLOCK,	/*  70 */
	/* 0x6c */ 0,
	/* 0x6d */ KEY_F10,		/*  68 */
	/* 0x6e */ KEY_COMPOSE,		/* 127 */
	/* 0x6f */ KEY_F12,		/*  88 */
	/* 0x70 */ 0,
	/* 0x71 */ KEY_PAUSE,		/* 119 */
	/* 0x72 */ KEY_INSERT,		/* 110 */
	/* 0x73 */ KEY_HOME,		/* 102 */
	/* 0x74 */ KEY_PAGEUP,		/* 104 */
	/* 0x75 */ KEY_DELETE,		/* 111 */
	/* 0x76 */ KEY_F4,		/*  62 */
	/* 0x77 */ KEY_END,		/* 107 */
	/* 0x78 */ KEY_F2,		/*  60 */
	/* 0x79 */ KEY_PAGEDOWN,	/* 109 */
	/* 0x7a */ KEY_F1,		/*  59 */
	/* 0x7b */ KEY_RIGHTSHIFT,	/*  54 */
	/* 0x7c */ KEY_RIGHTALT,	/* 100 */
	/* 0x7d */ KEY_RIGHTCTRL,	/*  97 */
	/* 0x7e */ KEY_RIGHTMETA,	/* 126 */
	/* 0x7f */ KEY_POWER,		/* 116 */
};

struct adbhid {
	struct input_dev *input;
	int id;
	int default_id;
	int original_handler_id;
	int current_handler_id;
	int mouse_kind;
	u16 *keycode;
	char name[64];
	char phys[32];
	int flags;
};

#define FLAG_FN_KEY_PRESSED	0x00000001
#define FLAG_POWER_FROM_FN	0x00000002
#define FLAG_EMU_FWDEL_DOWN	0x00000004
#define FLAG_CAPSLOCK_TRANSLATE	0x00000008
#define FLAG_CAPSLOCK_DOWN	0x00000010

static struct adbhid *adbhid[16];

static void adbhid_probe(void);

static void adbhid_input_keycode(int, int, int);

static void init_trackpad(int id);
static void init_trackball(int id);
static void init_turbomouse(int id);
static void init_microspeed(int id);
static void init_ms_a3(int id);

static struct adb_ids keyboard_ids;
static struct adb_ids mouse_ids;
static struct adb_ids buttons_ids;

/* Kind of keyboard, see Apple technote 1152  */
#define ADB_KEYBOARD_UNKNOWN	0
#define ADB_KEYBOARD_ANSI	0x0100
#define ADB_KEYBOARD_ISO	0x0200
#define ADB_KEYBOARD_JIS	0x0300

/* Kind of mouse  */
#define ADBMOUSE_STANDARD_100	0	/* Standard 100cpi mouse (handler 1) */
#define ADBMOUSE_STANDARD_200	1	/* Standard 200cpi mouse (handler 2) */
#define ADBMOUSE_EXTENDED	2	/* Apple Extended mouse (handler 4) */
#define ADBMOUSE_TRACKBALL	3	/* TrackBall (handler 4) */
#define ADBMOUSE_TRACKPAD       4	/* Apple's PowerBook trackpad (handler 4) */
#define ADBMOUSE_TURBOMOUSE5    5	/* Turbomouse 5 (previously req. mousehack) */
#define ADBMOUSE_MICROSPEED	6	/* Microspeed mouse (&trackball ?), MacPoint */
#define ADBMOUSE_TRACKBALLPRO	7	/* Trackball Pro (special buttons) */
#define ADBMOUSE_MS_A3		8	/* Mouse systems A3 trackball (handler 3) */
#define ADBMOUSE_MACALLY2	9	/* MacAlly 2-button mouse */

static void
adbhid_keyboard_input(unsigned char *data, int nb, int apoll)
{
	int id = (data[0] >> 4) & 0x0f;

	if (!adbhid[id]) {
		printk(KERN_ERR "ADB HID on ID %d not yet registered, packet %#02x, %#02x, %#02x, %#02x\n",
		       id, data[0], data[1], data[2], data[3]);
		return;
	}

	/* first check this is from register 0 */
	if (nb != 3 || (data[0] & 3) != KEYB_KEYREG)
		return;		/* ignore it */
	adbhid_input_keycode(id, data[1], 0);
	if (!(data[2] == 0xff || (data[2] == 0x7f && data[1] == 0x7f)))
		adbhid_input_keycode(id, data[2], 0);
}

static void
adbhid_input_keycode(int id, int scancode, int repeat)
{
	struct adbhid *ahid = adbhid[id];
	int keycode, up_flag, key;

	keycode = scancode & 0x7f;
	up_flag = scancode & 0x80;

	if (restore_capslock_events) {
		if (keycode == ADB_KEY_CAPSLOCK && !up_flag) {
			/* Key pressed, turning on the CapsLock LED.
			 * The next 0xff will be interpreted as a release. */
			ahid->flags |= FLAG_CAPSLOCK_TRANSLATE
					| FLAG_CAPSLOCK_DOWN;
		} else if (scancode == 0xff) {
			/* Scancode 0xff usually signifies that the capslock
			 * key was either pressed or released. */
			if (ahid->flags & FLAG_CAPSLOCK_TRANSLATE) {
				keycode = ADB_KEY_CAPSLOCK;
				if (ahid->flags & FLAG_CAPSLOCK_DOWN) {
					/* Key released */
					up_flag = 1;
					ahid->flags &= ~FLAG_CAPSLOCK_DOWN;
				} else {
					/* Key pressed */
					up_flag = 0;
					ahid->flags &= ~FLAG_CAPSLOCK_TRANSLATE;
				}
			} else {
				printk(KERN_INFO "Spurious caps lock event "
						"(scancode 0xff).");
			}
		}
	}

	switch (keycode) {
	case ADB_KEY_CAPSLOCK:
		if (!restore_capslock_events) {
			/* Generate down/up events for CapsLock everytime. */
			input_report_key(ahid->input, KEY_CAPSLOCK, 1);
			input_sync(ahid->input);
			input_report_key(ahid->input, KEY_CAPSLOCK, 0);
			input_sync(ahid->input);
			return;
		}
		break;
#ifdef CONFIG_PPC_PMAC
	case ADB_KEY_POWER_OLD: /* Power key on PBook 3400 needs remapping */
		switch(pmac_call_feature(PMAC_FTR_GET_MB_INFO,
			NULL, PMAC_MB_INFO_MODEL, 0)) {
		case PMAC_TYPE_COMET:
		case PMAC_TYPE_HOOPER:
		case PMAC_TYPE_KANGA:
			keycode = ADB_KEY_POWER;
		}
		break;
	case ADB_KEY_POWER:
		/* Fn + Command will produce a bogus "power" keycode */
		if (ahid->flags & FLAG_FN_KEY_PRESSED) {
			keycode = ADB_KEY_CMD;
			if (up_flag)
				ahid->flags &= ~FLAG_POWER_FROM_FN;
			else
				ahid->flags |= FLAG_POWER_FROM_FN;
		} else if (ahid->flags & FLAG_POWER_FROM_FN) {
			keycode = ADB_KEY_CMD;
			ahid->flags &= ~FLAG_POWER_FROM_FN;
		}
		break;
	case ADB_KEY_FN:
		/* Keep track of the Fn key state */
		if (up_flag) {
			ahid->flags &= ~FLAG_FN_KEY_PRESSED;
			/* Emulate Fn+delete = forward delete */
			if (ahid->flags & FLAG_EMU_FWDEL_DOWN) {
				ahid->flags &= ~FLAG_EMU_FWDEL_DOWN;
				keycode = ADB_KEY_FWDEL;
				break;
			}
		} else
			ahid->flags |= FLAG_FN_KEY_PRESSED;
		break;
	case ADB_KEY_DEL:
		/* Emulate Fn+delete = forward delete */
		if (ahid->flags & FLAG_FN_KEY_PRESSED) {
			keycode = ADB_KEY_FWDEL;
			if (up_flag)
				ahid->flags &= ~FLAG_EMU_FWDEL_DOWN;
			else
				ahid->flags |= FLAG_EMU_FWDEL_DOWN;
		}
		break;
#endif /* CONFIG_PPC_PMAC */
	}

	key = adbhid[id]->keycode[keycode];
	if (key) {
		input_report_key(adbhid[id]->input, key, !up_flag);
		input_sync(adbhid[id]->input);
	} else
		printk(KERN_INFO "Unhandled ADB key (scancode %#02x) %s.\n", keycode,
		       up_flag ? "released" : "pressed");

}

static void
adbhid_mouse_input(unsigned char *data, int nb, int autopoll)
{
	int id = (data[0] >> 4) & 0x0f;

	if (!adbhid[id]) {
		printk(KERN_ERR "ADB HID on ID %d not yet registered\n", id);
		return;
	}

  /*
    Handler 1 -- 100cpi original Apple mouse protocol.
    Handler 2 -- 200cpi original Apple mouse protocol.

    For Apple's standard one-button mouse protocol the data array will
    contain the following values:

                BITS    COMMENTS
    data[0] = dddd 1100 ADB command: Talk, register 0, for device dddd.
    data[1] = bxxx xxxx First button and x-axis motion.
    data[2] = byyy yyyy Second button and y-axis motion.

    Handler 4 -- Apple Extended mouse protocol.

    For Apple's 3-button mouse protocol the data array will contain the
    following values:

		BITS    COMMENTS
    data[0] = dddd 1100 ADB command: Talk, register 0, for device dddd.
    data[1] = bxxx xxxx Left button and x-axis motion.