text: /*
   * drivers/input/keyboard/jornada680_kbd.c
   *
   * HP Jornada 620/660/680/690 scan keyboard platform driver
   *  Copyright (C) 2007  Kristoffer Ericson <Kristoffer.Ericson@gmail.com>
   *
   * Based on hp680_keyb.c
   *  Copyright (C) 2006 Paul Mundt
   *  Copyright (C) 2005 Andriy Skulysh
   * Split from drivers/input/keyboard/hp600_keyb.c
   *  Copyright (C) 2000 Yaegashi Takeshi (hp6xx kbd scan routine and translation table)
   *  Copyright (C) 2000 Niibe Yutaka (HP620 Keyb translation table)
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   */
  
  #include <linux/init.h>
  #include <linux/input.h>
  #include <linux/input-polldev.h>
  #include <linux/interrupt.h>
  #include <linux/jiffies.h>
  #include <linux/kernel.h>
  #include <linux/module.h>
  #include <linux/platform_device.h>
  
  #include <asm/delay.h>
  #include <asm/io.h>
  
  #define PCCR 0xa4000104
  #define PDCR 0xa4000106
  #define PECR 0xa4000108
  #define PFCR 0xa400010a
  #define PCDR 0xa4000124
  #define PDDR 0xa4000126
  #define PEDR 0xa4000128
  #define PFDR 0xa400012a
  #define PGDR 0xa400012c
  #define PHDR 0xa400012e
  #define PJDR 0xa4000130
  #define PKDR 0xa4000132
  #define PLDR 0xa4000134
  
  static const unsigned short jornada_scancodes[] = {
  /* PTD1 */	KEY_CAPSLOCK, KEY_MACRO, KEY_LEFTCTRL, 0, KEY_ESC, KEY_KP5, 0, 0,			/*  1  -> 8   */
  		KEY_F1, KEY_F2, KEY_F3, KEY_F8, KEY_F7, KEY_F6, KEY_F4, KEY_F5,				/*  9  -> 16  */
  /* PTD5 */	KEY_SLASH, KEY_APOSTROPHE, KEY_ENTER, 0, KEY_Z, 0, 0, 0,				/*  17 -> 24  */
  		KEY_X, KEY_C, KEY_V, KEY_DOT, KEY_COMMA, KEY_M, KEY_B, KEY_N,				/*  25 -> 32  */
  /* PTD7 */	KEY_KP2, KEY_KP6, KEY_KP3, 0, 0, 0, 0, 0,						/*  33 -> 40  */
  		KEY_F10, KEY_RO, KEY_F9, KEY_KP4, KEY_NUMLOCK, KEY_SCROLLLOCK, KEY_LEFTALT, KEY_HANJA,	/*  41 -> 48  */
  /* PTE0 */	KEY_KATAKANA, KEY_KP0, KEY_GRAVE, 0, KEY_FINANCE, 0, 0, 0,				/*  49 -> 56  */
  		KEY_KPMINUS, KEY_HIRAGANA, KEY_SPACE, KEY_KPDOT, KEY_VOLUMEUP, 249, 0, 0,		/*  57 -> 64  */
  /* PTE1 */	KEY_SEMICOLON, KEY_RIGHTBRACE, KEY_BACKSLASH, 0, KEY_A, 0, 0, 0,			/*  65 -> 72  */
  		KEY_S, KEY_D, KEY_F, KEY_L, KEY_K, KEY_J, KEY_G, KEY_H,					/*  73 -> 80  */
  /* PTE3 */	KEY_KP8, KEY_LEFTMETA, KEY_RIGHTSHIFT, 0, KEY_TAB, 0, 0, 0,				/*  81 -> 88  */
  		0, KEY_LEFTSHIFT, KEY_KP7, KEY_KP9, KEY_KP1, KEY_F11, KEY_KPPLUS, KEY_KPASTERISK,	/*  89 -> 96  */
  /* PTE6 */	KEY_P, KEY_LEFTBRACE, KEY_BACKSPACE, 0, KEY_Q, 0, 0, 0,					/*  97 -> 104 */
  		KEY_W, KEY_E, KEY_R, KEY_O, KEY_I, KEY_U, KEY_T, KEY_Y,					/* 105 -> 112 */
  /* PTE7 */	KEY_0, KEY_MINUS, KEY_EQUAL, 0, KEY_1, 0, 0, 0,						/* 113 -> 120 */
  		KEY_2, KEY_3, KEY_4, KEY_9, KEY_8, KEY_7, KEY_5, KEY_6,					/* 121 -> 128 */
  /* **** */	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  		0, 0, 0, 0, 0
  };
  
  #define JORNADA_SCAN_SIZE	18
  
  struct jornadakbd {
  	struct input_polled_dev *poll_dev;
  	unsigned short keymap[ARRAY_SIZE(jornada_scancodes)];
  	unsigned char length;
  	unsigned char old_scan[JORNADA_SCAN_SIZE];
  	unsigned char new_scan[JORNADA_SCAN_SIZE];
  };
  
  static void jornada_parse_kbd(struct jornadakbd *jornadakbd)
  {
  	struct input_dev *input_dev = jornadakbd->poll_dev->input;
  	unsigned short *keymap = jornadakbd->keymap;
  	unsigned int sync_me = 0;
  	unsigned int i, j;
  
  	for (i = 0; i < JORNADA_SCAN_SIZE; i++) {
  		unsigned char new = jornadakbd->new_scan[i];
  		unsigned char old = jornadakbd->old_scan[i];
  		unsigned int xor = new ^ old;
  
  		if (xor == 0)
  			continue;
  
  		for (j = 0; j < 8; j++) {
  			unsigned int bit = 1 << j;
  			if (xor & bit) {
  				unsigned int scancode = (i << 3) + j;
  				input_event(input_dev,
  					    EV_MSC, MSC_SCAN, scancode);
  				input_report_key(input_dev,
  						 keymap[scancode],
  						 !(new & bit));
  				sync_me = 1;
  			}
  		}
  	}
  
  	if (sync_me)
  	    input_sync(input_dev);
  }
  
  static void jornada_scan_keyb(unsigned char *s)
  {
  	int i;
  	unsigned short ec_static, dc_static; /* = UINT16_t */
  	unsigned char matrix_switch[] = {
  		0xfd, 0xff,   /* PTD1 PD(1) */
  		0xdf, 0xff,   /* PTD5 PD(5) */
  		0x7f, 0xff,   /* PTD7 PD(7) */
  		0xff, 0xfe,   /* PTE0 PE(0) */
  		0xff, 0xfd,   /* PTE1 PE(1) */
  		0xff, 0xf7,   /* PTE3 PE(3) */
  		0xff, 0xbf,   /* PTE6 PE(6) */
  		0xff, 0x7f,   /* PTE7 PE(7) */
  	}, *t = matrix_switch;
  	/* PD(x) :
  	1.   0xcc0c & (1~(1 << (2*(x)+1)))))
  	2.   (0xf0cf & 0xfffff) */
  	/* PE(x) :
  	1.   0xcc0c & 0xffff
  	2.   0xf0cf & (1~(1 << (2*(x)+1))))) */
  	unsigned short matrix_PDE[] = {
  		0xcc04, 0xf0cf,  /* PD(1) */
  		0xc40c, 0xf0cf,	 /* PD(5) */
  		0x4c0c, 0xf0cf,  /* PD(7) */
  		0xcc0c, 0xf0cd,  /* PE(0) */
  		0xcc0c, 0xf0c7,	 /* PE(1) */
  		0xcc0c, 0xf04f,  /* PE(3) */
  		0xcc0c, 0xd0cf,	 /* PE(6) */
  		0xcc0c, 0x70cf,	 /* PE(7) */
  	}, *y = matrix_PDE;
  
  	/* Save these control reg bits */
  	dc_static = (ctrl_inw(PDCR) & (~0xcc0c));
  	ec_static = (ctrl_inw(PECR) & (~0xf0cf));
  
  	for (i = 0; i < 8; i++) {
  		/* disable output for all but the one we want to scan */
  		ctrl_outw((dc_static | *y++), PDCR);
  		ctrl_outw((ec_static | *y++), PECR);
  		udelay(5);
  
  		/* Get scanline row */
  		ctrl_outb(*t++, PDDR);
  		ctrl_outb(*t++, PEDR);
  		udelay(50);
  
  		/* Read data */
  		*s++ = ctrl_inb(PCDR);
  		*s++ = ctrl_inb(PFDR);
  	}
  	/* Scan no lines */
  	ctrl_outb(0xff, PDDR);
  	ctrl_outb(0xff, PEDR);
  
  	/* Enable all scanlines */
  	ctrl_outw((dc_static | (0x5555 & 0xcc0c)),PDCR);
  	ctrl_outw((ec_static | (0x5555 & 0xf0cf)),PECR);
  
  	/* Ignore extra keys and events */
  	*s++ = ctrl_inb(PGDR);
  	*s++ = ctrl_inb(PHDR);
  }
  
  static void jornadakbd680_poll(struct input_polled_dev *dev)
  {
  	struct jornadakbd *jornadakbd = dev->private;
  
  	jornada_scan_keyb(jornadakbd->new_scan);
  	jornada_parse_kbd(jornadakbd);
  	memcpy(jornadakbd->old_scan, jornadakbd->new_scan, JORNADA_SCAN_SIZE);
  }
  
  static int __devinit jornada680kbd_probe(struct platform_device *pdev)
  {
  	struct jornadakbd *jornadakbd;
  	struct input_polled_dev *poll_dev;
  	struct input_dev *input_dev;
  	int i, error;
  
  	jornadakbd = kzalloc(sizeof(struct jornadakbd), GFP_KERNEL);
  	if (!jornadakbd)
  		return -ENOMEM;
  
  	poll_dev = input_allocate_polled_device();
  	if (!poll_dev) {
  		error = -ENOMEM;
  		goto failed;
  	}
  
  	platform_set_drvdata(pdev, jornadakbd);
  
  	jornadakbd->poll_dev = poll_dev;
  
  	memcpy(jornadakbd->keymap, jornada_scancodes,
  		sizeof(jornadakbd->keymap));
  
  	poll_dev->private = jornadakbd;
  	poll_dev->poll = jornadakbd680_poll;
  	poll_dev->poll_interval = 50; /* msec */
  
  	input_dev = poll_dev->input;
  	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
  	input_dev->name = "HP Jornada 680 keyboard";
  	input_dev->phys = "jornadakbd/input0";
  	input_dev->keycode = jornadakbd->keymap;
  	input_dev->keycodesize = sizeof(unsigned short);
  	input_dev->keycodemax = ARRAY_SIZE(jornada_scancodes);
  	input_dev->dev.parent = &pdev->dev;
  	input_dev->id.bustype = BUS_HOST;
  
  	for (i = 0; i < 128; i++)
  		if (jornadakbd->keymap[i])
  			__set_bit(jornadakbd->keymap[i], input_dev->keybit);
  	__clear_bit(KEY_RESERVED, input_dev->keybit);
  
  	input_set_capability(input_dev, EV_MSC, MSC_SCAN);
  
  	error = input_register_polled_device(jornadakbd->poll_dev);
  	if (error)
  		goto failed;
  
  	return 0;
  
   failed:
  	printk(KERN_ERR "Jornadakbd: failed to register driver, error: %d\n",
  		error);
  	platform_set_drvdata(pdev, NULL);
  	input_free_polled_device(poll_dev);
  	kfree(jornadakbd);
  	return error;
  
  }
  
  static int __devexit jornada680kbd_remove(struct platform_device *pdev)
  {
  	struct jornadakbd *jornadakbd = platform_get_drvdata(pdev);
  
  	platform_set_drvdata(pdev, NULL);
  	input_unregister_polled_device(jornadakbd->poll_dev);
  	input_free_polled_device(jornadakbd->poll_dev);
  	kfree(jornadakbd);
  
  	return 0;
  }
  
  static struct platform_driver jornada680kbd_driver = {
  	.driver	= {
  		.name	= "jornada680_kbd",
  		.owner	= THIS_MODULE,
  	},
  	.probe	= jornada680kbd_probe,
  	.remove	= __devexit_p(jornada680kbd_remove),
  };
  
  static int __init jornada680kbd_init(void)
  {
  	return platform_driver_register(&jornada680kbd_driver);
  }
  
  static void __exit jornada680kbd_exit(void)
  {
  	platform_driver_unregister(&jornada680kbd_driver);
  }
  
  module_init(jornada680kbd_init);
  module_exit(jornada680kbd_exit);
  
  MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
  MODULE_DESCRIPTION("HP Jornada 620/660/680/690 Keyboard Driver");
  MODULE_LICENSE("GPL v2");
  MODULE_ALIAS("platform:jornada680_kbd");
  