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/*

 * $Id: amikbd.c,v 1.13 2002/02/01 16:02:24 vojtech Exp $

 *

 *  Copyright (c) 2000-2001 Vojtech Pavlik

 *

 *  Based on the work of:

 *      Hamish Macdonald

 */

/*

 * Amiga keyboard driver for Linux/m68k

 */

/*

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

 *

 * Should you need to contact me, the author, you can do so either by

 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:

 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic

 */

#include <linux/module.h>

#include <linux/init.h>

#include <linux/input.h>

#include <linux/delay.h>

#include <linux/interrupt.h>

#include <linux/keyboard.h>

#include <asm/amigaints.h>

#include <asm/amigahw.h>

#include <asm/irq.h>

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");

MODULE_DESCRIPTION("Amiga keyboard driver");

MODULE_LICENSE("GPL");

static unsigned char amikbd_keycode[0x78] __initdata = {

        [0]       = KEY_GRAVE,

        [1]      = KEY_1,

        [2]      = KEY_2,

        [3]      = KEY_3,

        [4]      = KEY_4,

        [5]      = KEY_5,

        [6]      = KEY_6,

        [7]      = KEY_7,

        [8]      = KEY_8,

        [9]      = KEY_9,

        [10]     = KEY_0,

        [11]     = KEY_MINUS,

        [12]     = KEY_EQUAL,

        [13]     = KEY_BACKSLASH,

        [15]     = KEY_KP0,

        [16]     = KEY_Q,

        [17]     = KEY_W,

        [18]     = KEY_E,

        [19]     = KEY_R,

        [20]     = KEY_T,

        [21]     = KEY_Y,

        [22]     = KEY_U,

        [23]     = KEY_I,

        [24]     = KEY_O,

        [25]     = KEY_P,

        [26]     = KEY_LEFTBRACE,

        [27]     = KEY_RIGHTBRACE,

        [29]     = KEY_KP1,

        [30]     = KEY_KP2,

        [31]     = KEY_KP3,

        [32]     = KEY_A,

        [33]     = KEY_S,

        [34]     = KEY_D,

        [35]     = KEY_F,

        [36]     = KEY_G,

        [37]     = KEY_H,

        [38]     = KEY_J,

        [39]     = KEY_K,

        [40]     = KEY_L,

        [41]     = KEY_SEMICOLON,

        [42]     = KEY_APOSTROPHE,

        [43]     = KEY_BACKSLASH,

        [45]     = KEY_KP4,

        [46]     = KEY_KP5,

        [47]     = KEY_KP6,

        [48]     = KEY_102ND,

        [49]     = KEY_Z,

        [50]     = KEY_X,

        [51]     = KEY_C,

        [52]     = KEY_V,

        [53]     = KEY_B,

        [54]     = KEY_N,

        [55]     = KEY_M,

        [56]     = KEY_COMMA,

        [57]     = KEY_DOT,

        [58]     = KEY_SLASH,

        [60]     = KEY_KPDOT,

        [61]     = KEY_KP7,

        [62]     = KEY_KP8,

        [63]     = KEY_KP9,

        [64]     = KEY_SPACE,

        [65]     = KEY_BACKSPACE,

        [66]     = KEY_TAB,

        [67]     = KEY_KPENTER,

        [68]     = KEY_ENTER,

        [69]     = KEY_ESC,

        [70]     = KEY_DELETE,

        [74]     = KEY_KPMINUS,

        [76]     = KEY_UP,

        [77]     = KEY_DOWN,

        [78]     = KEY_RIGHT,

        [79]     = KEY_LEFT,

        [80]     = KEY_F1,

        [81]     = KEY_F2,

        [82]     = KEY_F3,

        [83]     = KEY_F4,

        [84]     = KEY_F5,

        [85]     = KEY_F6,

        [86]     = KEY_F7,

        [87]     = KEY_F8,

        [88]     = KEY_F9,

        [89]     = KEY_F10,

        [90]     = KEY_KPLEFTPAREN,

        [91]     = KEY_KPRIGHTPAREN,

        [92]     = KEY_KPSLASH,

        [93]     = KEY_KPASTERISK,

        [94]     = KEY_KPPLUS,

        [95]     = KEY_HELP,

        [96]     = KEY_LEFTSHIFT,

        [97]     = KEY_RIGHTSHIFT,

        [98]     = KEY_CAPSLOCK,

        [99]     = KEY_LEFTCTRL,

        [100]    = KEY_LEFTALT,

        [101]    = KEY_RIGHTALT,

        [102]    = KEY_LEFTMETA,

        [103]    = KEY_RIGHTMETA

};

static const char *amikbd_messages[8] = {

        [0] = KERN_ALERT "amikbd: Ctrl-Amiga-Amiga reset warning!!\n",

        [1] = KERN_WARNING "amikbd: keyboard lost sync\n",

        [2] = KERN_WARNING "amikbd: keyboard buffer overflow\n",

        [3] = KERN_WARNING "amikbd: keyboard controller failure\n",

        [4] = KERN_ERR "amikbd: keyboard selftest failure\n",

        [5] = KERN_INFO "amikbd: initiate power-up key stream\n",

        [6] = KERN_INFO "amikbd: terminate power-up key stream\n",

        [7] = KERN_WARNING "amikbd: keyboard interrupt\n"

};

static struct input_dev *amikbd_dev;

static irqreturn_t amikbd_interrupt(int irq, void *dummy)

{

        unsigned char scancode, down;

        scancode = ~ciaa.sdr;           /* get and invert scancode (keyboard is active low) */

        ciaa.cra |= 0x40;               /* switch SP pin to output for handshake */

        udelay(85);                     /* wait until 85 us have expired */

        ciaa.cra &= ~0x40;              /* switch CIA serial port to input mode */

        down = !(scancode & 1);         /* lowest bit is release bit */

        scancode >>= 1;

        if (scancode < 0x78) {          /* scancodes < 0x78 are keys */

                if (scancode == 98) {   /* CapsLock is a toggle switch key on Amiga */

                        input_report_key(amikbd_dev, scancode, 1);

                        input_report_key(amikbd_dev, scancode, 0);

                } else {

                        input_report_key(amikbd_dev, scancode, down);

                }

                input_sync(amikbd_dev);

        } else                          /* scancodes >= 0x78 are error codes */

                printk(amikbd_messages[scancode - 0x78]);

        return IRQ_HANDLED;

}

static int __init amikbd_init(void)

{

        int i, j, err;

        if (!AMIGAHW_PRESENT(AMI_KEYBOARD))

                return -ENODEV;

        if (!request_mem_region(CIAA_PHYSADDR-1+0xb00, 0x100, "amikeyb"))

                return -EBUSY;

        amikbd_dev = input_allocate_device();

        if (!amikbd_dev) {

                printk(KERN_ERR "amikbd: not enough memory for input device\n");

                err = -ENOMEM;

                goto fail1;

        }

        amikbd_dev->name = "Amiga Keyboard";

        amikbd_dev->phys = "amikbd/input0";

        amikbd_dev->id.bustype = BUS_AMIGA;

        amikbd_dev->id.vendor = 0x0001;

        amikbd_dev->id.product = 0x0001;

        amikbd_dev->id.version = 0x0100;

        amikbd_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);

        for (i = 0; i < 0x78; i++)

                set_bit(i, amikbd_dev->keybit);

        for (i = 0; i < MAX_NR_KEYMAPS; i++) {

                static u_short temp_map[NR_KEYS] __initdata;

                if (!key_maps[i])

                        continue;

                memset(temp_map, 0, sizeof(temp_map));

                for (j = 0; j < 0x78; j++) {

                        if (!amikbd_keycode[j])

                                continue;

                        temp_map[j] = key_maps[i][amikbd_keycode[j]];

                }

                for (j = 0; j < NR_KEYS; j++) {

                        if (!temp_map[j])

                                temp_map[j] = 0xf200;

                }

                memcpy(key_maps[i], temp_map, sizeof(temp_map));

        }

        ciaa.cra &= ~0x41;       /* serial data in, turn off TA */

        if (request_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt, 0, "amikbd",

                        amikbd_interrupt)) {

                err = -EBUSY;

                goto fail2;

        }

        err = input_register_device(amikbd_dev);

        if (err)

                goto fail3;

        return 0;

 fail3: free_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt);

 fail2: input_free_device(amikbd_dev);

 fail1: release_mem_region(CIAA_PHYSADDR - 1 + 0xb00, 0x100);

        return err;

}

static void __exit amikbd_exit(void)

{

        free_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt);

        input_unregister_device(amikbd_dev);

        release_mem_region(CIAA_PHYSADDR - 1 + 0xb00, 0x100);

}

module_init(amikbd_init);

module_exit(amikbd_exit);