/*
   * IBM ASM Service Processor Device Driver
   *
   * 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.
   *
   * Copyright (C) IBM Corporation, 2004
   *

   * Authors: Max Asböck <amax@us.ibm.com>

   *          Vernon Mauery <vernux@us.ibm.com>

   *
   */
  
  /* Remote mouse and keyboard event handling functions */

  #include <linux/pci.h>

  #include "ibmasm.h"
  #include "remote.h"

  #define MOUSE_X_MAX	1600
  #define MOUSE_Y_MAX	1200

  static const unsigned short xlate_high[XLATE_SIZE] = {

  	[KEY_SYM_ENTER & 0xff] = KEY_ENTER,
  	[KEY_SYM_KPSLASH & 0xff] = KEY_KPSLASH,
  	[KEY_SYM_KPSTAR & 0xff] = KEY_KPASTERISK,
  	[KEY_SYM_KPMINUS & 0xff] = KEY_KPMINUS,
  	[KEY_SYM_KPDOT & 0xff] = KEY_KPDOT,
  	[KEY_SYM_KPPLUS & 0xff] = KEY_KPPLUS,
  	[KEY_SYM_KP0 & 0xff] = KEY_KP0,
  	[KEY_SYM_KP1 & 0xff] = KEY_KP1,
  	[KEY_SYM_KP2 & 0xff] = KEY_KP2, [KEY_SYM_KPDOWN & 0xff] = KEY_KP2,
  	[KEY_SYM_KP3 & 0xff] = KEY_KP3,
  	[KEY_SYM_KP4 & 0xff] = KEY_KP4, [KEY_SYM_KPLEFT & 0xff] = KEY_KP4,
  	[KEY_SYM_KP5 & 0xff] = KEY_KP5,
  	[KEY_SYM_KP6 & 0xff] = KEY_KP6, [KEY_SYM_KPRIGHT & 0xff] = KEY_KP6,
  	[KEY_SYM_KP7 & 0xff] = KEY_KP7,
  	[KEY_SYM_KP8 & 0xff] = KEY_KP8, [KEY_SYM_KPUP & 0xff] = KEY_KP8,
  	[KEY_SYM_KP9 & 0xff] = KEY_KP9,
  	[KEY_SYM_BK_SPC & 0xff] = KEY_BACKSPACE,
  	[KEY_SYM_TAB & 0xff] = KEY_TAB,
  	[KEY_SYM_CTRL & 0xff] = KEY_LEFTCTRL,
  	[KEY_SYM_ALT & 0xff] = KEY_LEFTALT,
  	[KEY_SYM_INSERT & 0xff] = KEY_INSERT,
  	[KEY_SYM_DELETE & 0xff] = KEY_DELETE,
  	[KEY_SYM_SHIFT & 0xff] = KEY_LEFTSHIFT,
  	[KEY_SYM_UARROW & 0xff] = KEY_UP,
  	[KEY_SYM_DARROW & 0xff] = KEY_DOWN,
  	[KEY_SYM_LARROW & 0xff] = KEY_LEFT,
  	[KEY_SYM_RARROW & 0xff] = KEY_RIGHT,
  	[KEY_SYM_ESCAPE & 0xff] = KEY_ESC,
          [KEY_SYM_PAGEUP & 0xff] = KEY_PAGEUP,
          [KEY_SYM_PAGEDOWN & 0xff] = KEY_PAGEDOWN,
          [KEY_SYM_HOME & 0xff] = KEY_HOME,
          [KEY_SYM_END & 0xff] = KEY_END,
  	[KEY_SYM_F1 & 0xff] = KEY_F1,
  	[KEY_SYM_F2 & 0xff] = KEY_F2,
  	[KEY_SYM_F3 & 0xff] = KEY_F3,
  	[KEY_SYM_F4 & 0xff] = KEY_F4,
  	[KEY_SYM_F5 & 0xff] = KEY_F5,
  	[KEY_SYM_F6 & 0xff] = KEY_F6,
  	[KEY_SYM_F7 & 0xff] = KEY_F7,
  	[KEY_SYM_F8 & 0xff] = KEY_F8,
  	[KEY_SYM_F9 & 0xff] = KEY_F9,
  	[KEY_SYM_F10 & 0xff] = KEY_F10,
  	[KEY_SYM_F11 & 0xff] = KEY_F11,
  	[KEY_SYM_F12 & 0xff] = KEY_F12,
  	[KEY_SYM_CAP_LOCK & 0xff] = KEY_CAPSLOCK,
  	[KEY_SYM_NUM_LOCK & 0xff] = KEY_NUMLOCK,
  	[KEY_SYM_SCR_LOCK & 0xff] = KEY_SCROLLLOCK,
  };

  
  static const unsigned short xlate[XLATE_SIZE] = {

  	[NO_KEYCODE] = KEY_RESERVED,
  	[KEY_SYM_SPACE] = KEY_SPACE,
  	[KEY_SYM_TILDE] = KEY_GRAVE,        [KEY_SYM_BKTIC] = KEY_GRAVE,
  	[KEY_SYM_ONE] = KEY_1,              [KEY_SYM_BANG] = KEY_1,
  	[KEY_SYM_TWO] = KEY_2,              [KEY_SYM_AT] = KEY_2,
  	[KEY_SYM_THREE] = KEY_3,            [KEY_SYM_POUND] = KEY_3,
  	[KEY_SYM_FOUR] = KEY_4,             [KEY_SYM_DOLLAR] = KEY_4,
  	[KEY_SYM_FIVE] = KEY_5,             [KEY_SYM_PERCENT] = KEY_5,
  	[KEY_SYM_SIX] = KEY_6,              [KEY_SYM_CARAT] = KEY_6,
  	[KEY_SYM_SEVEN] = KEY_7,            [KEY_SYM_AMPER] = KEY_7,
  	[KEY_SYM_EIGHT] = KEY_8,            [KEY_SYM_STAR] = KEY_8,
  	[KEY_SYM_NINE] = KEY_9,             [KEY_SYM_LPAREN] = KEY_9,
  	[KEY_SYM_ZERO] = KEY_0,             [KEY_SYM_RPAREN] = KEY_0,
  	[KEY_SYM_MINUS] = KEY_MINUS,        [KEY_SYM_USCORE] = KEY_MINUS,
  	[KEY_SYM_EQUAL] = KEY_EQUAL,        [KEY_SYM_PLUS] = KEY_EQUAL,
  	[KEY_SYM_LBRKT] = KEY_LEFTBRACE,    [KEY_SYM_LCURLY] = KEY_LEFTBRACE,
  	[KEY_SYM_RBRKT] = KEY_RIGHTBRACE,   [KEY_SYM_RCURLY] = KEY_RIGHTBRACE,
  	[KEY_SYM_SLASH] = KEY_BACKSLASH,    [KEY_SYM_PIPE] = KEY_BACKSLASH,
  	[KEY_SYM_TIC] = KEY_APOSTROPHE,     [KEY_SYM_QUOTE] = KEY_APOSTROPHE,
  	[KEY_SYM_SEMIC] = KEY_SEMICOLON,    [KEY_SYM_COLON] = KEY_SEMICOLON,
  	[KEY_SYM_COMMA] = KEY_COMMA,        [KEY_SYM_LT] = KEY_COMMA,
  	[KEY_SYM_PERIOD] = KEY_DOT,         [KEY_SYM_GT] = KEY_DOT,
  	[KEY_SYM_BSLASH] = KEY_SLASH,       [KEY_SYM_QMARK] = KEY_SLASH,
  	[KEY_SYM_A] = KEY_A,                [KEY_SYM_a] = KEY_A,
  	[KEY_SYM_B] = KEY_B,                [KEY_SYM_b] = KEY_B,
  	[KEY_SYM_C] = KEY_C,                [KEY_SYM_c] = KEY_C,
  	[KEY_SYM_D] = KEY_D,                [KEY_SYM_d] = KEY_D,
  	[KEY_SYM_E] = KEY_E,                [KEY_SYM_e] = KEY_E,
  	[KEY_SYM_F] = KEY_F,                [KEY_SYM_f] = KEY_F,
  	[KEY_SYM_G] = KEY_G,                [KEY_SYM_g] = KEY_G,
  	[KEY_SYM_H] = KEY_H,                [KEY_SYM_h] = KEY_H,
  	[KEY_SYM_I] = KEY_I,                [KEY_SYM_i] = KEY_I,
  	[KEY_SYM_J] = KEY_J,                [KEY_SYM_j] = KEY_J,
  	[KEY_SYM_K] = KEY_K,                [KEY_SYM_k] = KEY_K,
  	[KEY_SYM_L] = KEY_L,                [KEY_SYM_l] = KEY_L,
  	[KEY_SYM_M] = KEY_M,                [KEY_SYM_m] = KEY_M,
  	[KEY_SYM_N] = KEY_N,                [KEY_SYM_n] = KEY_N,
  	[KEY_SYM_O] = KEY_O,                [KEY_SYM_o] = KEY_O,
  	[KEY_SYM_P] = KEY_P,                [KEY_SYM_p] = KEY_P,
  	[KEY_SYM_Q] = KEY_Q,                [KEY_SYM_q] = KEY_Q,
  	[KEY_SYM_R] = KEY_R,                [KEY_SYM_r] = KEY_R,
  	[KEY_SYM_S] = KEY_S,                [KEY_SYM_s] = KEY_S,
  	[KEY_SYM_T] = KEY_T,                [KEY_SYM_t] = KEY_T,
  	[KEY_SYM_U] = KEY_U,                [KEY_SYM_u] = KEY_U,
  	[KEY_SYM_V] = KEY_V,                [KEY_SYM_v] = KEY_V,
  	[KEY_SYM_W] = KEY_W,                [KEY_SYM_w] = KEY_W,
  	[KEY_SYM_X] = KEY_X,                [KEY_SYM_x] = KEY_X,
  	[KEY_SYM_Y] = KEY_Y,                [KEY_SYM_y] = KEY_Y,
  	[KEY_SYM_Z] = KEY_Z,                [KEY_SYM_z] = KEY_Z,
  };

  static void print_input(struct remote_input *input)

  {

  	if (input->type == INPUT_TYPE_MOUSE) {
  		unsigned char buttons = input->mouse_buttons;
  		dbg("remote mouse movement: (x,y)=(%d,%d)%s%s%s%s
  ",
  			input->data.mouse.x, input->data.mouse.y,

  			(buttons) ? " -- buttons:" : "",
  			(buttons & REMOTE_BUTTON_LEFT) ? "left " : "",
  			(buttons & REMOTE_BUTTON_MIDDLE) ? "middle " : "",
  			(buttons & REMOTE_BUTTON_RIGHT) ? "right" : ""

  		      );
  	} else {
  		dbg("remote keypress (code, flag, down):"
  			   "%d (0x%x) [0x%x] [0x%x]
  ",
  				input->data.keyboard.key_code,
  				input->data.keyboard.key_code,
  				input->data.keyboard.key_flag,
  				input->data.keyboard.key_down
  		      );
  	}

  }

  static void send_mouse_event(struct input_dev *dev, struct remote_input *input)

  {

  	unsigned char buttons = input->mouse_buttons;

  	input_report_abs(dev, ABS_X, input->data.mouse.x);
  	input_report_abs(dev, ABS_Y, input->data.mouse.y);
  	input_report_key(dev, BTN_LEFT, buttons & REMOTE_BUTTON_LEFT);
  	input_report_key(dev, BTN_MIDDLE, buttons & REMOTE_BUTTON_MIDDLE);
  	input_report_key(dev, BTN_RIGHT, buttons & REMOTE_BUTTON_RIGHT);
  	input_sync(dev);

  }

  static void send_keyboard_event(struct input_dev *dev,

  		struct remote_input *input)

  {

  	unsigned int key;
  	unsigned short code = input->data.keyboard.key_code;

  	if (code & 0xff00)
  		key = xlate_high[code & 0xff];
  	else
  		key = xlate[code];

  	input_report_key(dev, key, input->data.keyboard.key_down);

  	input_sync(dev);

  }

  void ibmasm_handle_mouse_interrupt(struct service_processor *sp)

  {

  	unsigned long reader;
  	unsigned long writer;
  	struct remote_input input;

  	reader = get_queue_reader(sp);
  	writer = get_queue_writer(sp);

  	while (reader != writer) {
  		memcpy_fromio(&input, get_queue_entry(sp, reader),
  				sizeof(struct remote_input));

  		print_input(&input);
  		if (input.type == INPUT_TYPE_MOUSE) {

  			send_mouse_event(sp->remote.mouse_dev, &input);

  		} else if (input.type == INPUT_TYPE_KEYBOARD) {

  			send_keyboard_event(sp->remote.keybd_dev, &input);

  		} else
  			break;

  		reader = advance_queue_reader(sp, reader);
  		writer = get_queue_writer(sp);
  	}

  }

  int ibmasm_init_remote_input_dev(struct service_processor *sp)

  {

  	/* set up the mouse input device */

  	struct input_dev *mouse_dev, *keybd_dev;

  	struct pci_dev *pdev = to_pci_dev(sp->dev);

  	int error = -ENOMEM;

  	int i;

  	sp->remote.mouse_dev = mouse_dev = input_allocate_device();
  	sp->remote.keybd_dev = keybd_dev = input_allocate_device();

  	if (!mouse_dev || !keybd_dev)
  		goto err_free_devices;

  	mouse_dev->id.bustype = BUS_PCI;
  	mouse_dev->id.vendor = pdev->vendor;
  	mouse_dev->id.product = pdev->device;
  	mouse_dev->id.version = 1;

  	mouse_dev->dev.parent = sp->dev;

  	mouse_dev->evbit[0]  = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
  	mouse_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
  		BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);

  	set_bit(BTN_TOUCH, mouse_dev->keybit);

  	mouse_dev->name = "ibmasm RSA I remote mouse";
  	input_set_abs_params(mouse_dev, ABS_X, 0, MOUSE_X_MAX, 0, 0);
  	input_set_abs_params(mouse_dev, ABS_Y, 0, MOUSE_Y_MAX, 0, 0);

  	keybd_dev->id.bustype = BUS_PCI;

  	keybd_dev->id.vendor = pdev->vendor;
  	keybd_dev->id.product = pdev->device;

  	keybd_dev->id.version = 2;
  	keybd_dev->dev.parent = sp->dev;

  	keybd_dev->evbit[0]  = BIT_MASK(EV_KEY);

  	keybd_dev->name = "ibmasm RSA I remote keyboard";

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

  		if (xlate_high[i])

  			set_bit(xlate_high[i], keybd_dev->keybit);

  		if (xlate[i])

  			set_bit(xlate[i], keybd_dev->keybit);

  	}

  	error = input_register_device(mouse_dev);
  	if (error)
  		goto err_free_devices;
  
  	error = input_register_device(keybd_dev);
  	if (error)
  		goto err_unregister_mouse_dev;

  	enable_mouse_interrupts(sp);

  	printk(KERN_INFO "ibmasm remote responding to events on RSA card %d
  ", sp->number);

  	return 0;

  
   err_unregister_mouse_dev:
  	input_unregister_device(mouse_dev);

  	mouse_dev = NULL; /* so we don't try to free it again below */

   err_free_devices:
  	input_free_device(mouse_dev);
  	input_free_device(keybd_dev);
  
  	return error;

  }

  void ibmasm_free_remote_input_dev(struct service_processor *sp)
  {
  	disable_mouse_interrupts(sp);

  	input_unregister_device(sp->remote.mouse_dev);
  	input_unregister_device(sp->remote.keybd_dev);

  }