[linux-2.6-block.git] / drivers / input / keyboard / corgikbd.c

/*
 *  Keyboard driver for Sharp Corgi models (SL-C7xx)
 *
 *  Copyright (c) 2004-2005 Richard Purdie
 *
 *  Based on xtkbd.c/locomkbd.c
 *
 *  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/delay.h>
#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/jiffies.h>
#include <linux/module.h>
#include <linux/slab.h>

#include <asm/arch/corgi.h>
#include <asm/arch/hardware.h>
#include <asm/arch/pxa-regs.h>
#include <asm/hardware/scoop.h>

#define KB_ROWS				8
#define KB_COLS				12
#define KB_ROWMASK(r)		(1 << (r))
#define SCANCODE(r,c)		( ((r)<<4) + (c) + 1 )
/* zero code, 124 scancodes */
#define	NR_SCANCODES		( SCANCODE(KB_ROWS-1,KB_COLS-1) +1 +1 )

#define SCAN_INTERVAL		(50) /* ms */
#define HINGE_SCAN_INTERVAL	(250) /* ms */

#define CORGI_KEY_CALENDER	KEY_F1
#define CORGI_KEY_ADDRESS	KEY_F2
#define CORGI_KEY_FN		KEY_F3
#define CORGI_KEY_CANCEL	KEY_F4
#define CORGI_KEY_OFF		KEY_SUSPEND
#define CORGI_KEY_EXOK		KEY_F5
#define CORGI_KEY_EXCANCEL	KEY_F6
#define CORGI_KEY_EXJOGDOWN	KEY_F7
#define CORGI_KEY_EXJOGUP	KEY_F8
#define CORGI_KEY_JAP1		KEY_LEFTCTRL
#define CORGI_KEY_JAP2		KEY_LEFTALT
#define CORGI_KEY_MAIL		KEY_F10
#define CORGI_KEY_OK		KEY_F11
#define CORGI_KEY_MENU		KEY_F12

static unsigned char corgikbd_keycode[NR_SCANCODES] = {
	0,                                                                                                                /* 0 */
	0, KEY_1, KEY_3, KEY_5, KEY_6, KEY_7, KEY_9, KEY_0, KEY_BACKSPACE, 0, 0, 0, 0, 0, 0, 0, 	                      /* 1-16 */
	0, KEY_2, KEY_4, KEY_R, KEY_Y, KEY_8, KEY_I, KEY_O, KEY_P, 0, 0, 0, 0, 0, 0, 0,                                   /* 17-32 */
	KEY_TAB, KEY_Q, KEY_E, KEY_T, KEY_G, KEY_U, KEY_J, KEY_K, 0, 0, 0, 0, 0, 0, 0, 0,                                 /* 33-48 */
	CORGI_KEY_CALENDER, KEY_W, KEY_S, KEY_F, KEY_V, KEY_H, KEY_M, KEY_L, 0, KEY_RIGHTSHIFT, 0, 0, 0, 0, 0, 0,         /* 49-64 */
	CORGI_KEY_ADDRESS, KEY_A, KEY_D, KEY_C, KEY_B, KEY_N, KEY_DOT, 0, KEY_ENTER, 0, KEY_LEFTSHIFT, 0, 0, 0, 0, 0, 	  /* 65-80 */
	CORGI_KEY_MAIL, KEY_Z, KEY_X, KEY_MINUS, KEY_SPACE, KEY_COMMA, 0, KEY_UP, 0, 0, 0, CORGI_KEY_FN, 0, 0, 0, 0,            /* 81-96 */
	KEY_SYSRQ, CORGI_KEY_JAP1, CORGI_KEY_JAP2, CORGI_KEY_CANCEL, CORGI_KEY_OK, CORGI_KEY_MENU, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0, 0, 0, 0, 0,  /* 97-112 */
	CORGI_KEY_OFF, CORGI_KEY_EXOK, CORGI_KEY_EXCANCEL, CORGI_KEY_EXJOGDOWN, CORGI_KEY_EXJOGUP, 0, 0, 0, 0, 0, 0, 0,   /* 113-124 */
};


struct corgikbd {
	unsigned char keycode[ARRAY_SIZE(corgikbd_keycode)];
	struct input_dev *input;

	spinlock_t lock;
	struct timer_list timer;
	struct timer_list htimer;

	unsigned int suspended;
	unsigned long suspend_jiffies;
};

#define KB_DISCHARGE_DELAY	10
#define KB_ACTIVATE_DELAY	10

/* Helper functions for reading the keyboard matrix
 * Note: We should really be using pxa_gpio_mode to alter GPDR but it
 *       requires a function call per GPIO bit which is excessive
 *       when we need to access 12 bits at once multiple times.
 * These functions must be called within local_irq_save()/local_irq_restore()
 * or similar.
 */
static inline void corgikbd_discharge_all(void)
{
	/* STROBE All HiZ */
	GPCR2  = CORGI_GPIO_ALL_STROBE_BIT;
	GPDR2 &= ~CORGI_GPIO_ALL_STROBE_BIT;
}

static inline void corgikbd_activate_all(void)
{
	/* STROBE ALL -> High */
	GPSR2  = CORGI_GPIO_ALL_STROBE_BIT;
	GPDR2 |= CORGI_GPIO_ALL_STROBE_BIT;

	udelay(KB_DISCHARGE_DELAY);

	/* Clear any interrupts we may have triggered when altering the GPIO lines */
	GEDR1 = CORGI_GPIO_HIGH_SENSE_BIT;
	GEDR2 = CORGI_GPIO_LOW_SENSE_BIT;
}

static inline void corgikbd_activate_col(int col)
{
	/* STROBE col -> High, not col -> HiZ */
	GPSR2 = CORGI_GPIO_STROBE_BIT(col);
	GPDR2 = (GPDR2 & ~CORGI_GPIO_ALL_STROBE_BIT) | CORGI_GPIO_STROBE_BIT(col);
}

static inline void corgikbd_reset_col(int col)
{
	/* STROBE col -> Low */
	GPCR2 = CORGI_GPIO_STROBE_BIT(col);
	/* STROBE col -> out, not col -> HiZ */
	GPDR2 = (GPDR2 & ~CORGI_GPIO_ALL_STROBE_BIT) | CORGI_GPIO_STROBE_BIT(col);
}

#define GET_ROWS_STATUS(c)	(((GPLR1 & CORGI_GPIO_HIGH_SENSE_BIT) >> CORGI_GPIO_HIGH_SENSE_RSHIFT) | ((GPLR2 & CORGI_GPIO_LOW_SENSE_BIT) << CORGI_GPIO_LOW_SENSE_LSHIFT))

/*
 * The corgi keyboard only generates interrupts when a key is pressed.
 * When a key is pressed, we enable a timer which then scans the
 * keyboard to detect when the key is released.
 */

/* Scan the hardware keyboard and push any changes up through the input layer */
static void corgikbd_scankeyboard(struct corgikbd *corgikbd_data)
{
	unsigned int row, col, rowd;
	unsigned long flags;
	unsigned int num_pressed;

	if (corgikbd_data->suspended)
		return;

	spin_lock_irqsave(&corgikbd_data->lock, flags);

	num_pressed = 0;
	for (col = 0; col < KB_COLS; col++) {
		/*
		 * Discharge the output driver capacitatance
		 * in the keyboard matrix. (Yes it is significant..)
		 */

		corgikbd_discharge_all();
		udelay(KB_DISCHARGE_DELAY);

		corgikbd_activate_col(col);
		udelay(KB_ACTIVATE_DELAY);

		rowd = GET_ROWS_STATUS(col);
		for (row = 0; row < KB_ROWS; row++) {
			unsigned int scancode, pressed;

			scancode = SCANCODE(row, col);
			pressed = rowd & KB_ROWMASK(row);

			input_report_key(corgikbd_data->input, corgikbd_data->keycode[scancode], pressed);

			if (pressed)
				num_pressed++;

			if (pressed && (corgikbd_data->keycode[scancode] == CORGI_KEY_OFF)
					&& time_after(jiffies, corgikbd_data->suspend_jiffies + HZ)) {
				input_event(corgikbd_data->input, EV_PWR, CORGI_KEY_OFF, 1);
				corgikbd_data->suspend_jiffies=jiffies;
			}
		}
		corgikbd_reset_col(col);
	}

	corgikbd_activate_all();

	input_sync(corgikbd_data->input);

	/* if any keys are pressed, enable the timer */
	if (num_pressed)
		mod_timer(&corgikbd_data->timer, jiffies + msecs_to_jiffies(SCAN_INTERVAL));

	spin_unlock_irqrestore(&corgikbd_data->lock, flags);
}

/*
 * corgi keyboard interrupt handler.
 */
static irqreturn_t corgikbd_interrupt(int irq, void *dev_id)
{
	struct corgikbd *corgikbd_data = dev_id;

	if (!timer_pending(&corgikbd_data->timer)) {
		/** wait chattering delay **/
		udelay(20);
		corgikbd_scankeyboard(corgikbd_data);
	}

	return IRQ_HANDLED;
}

/*
 * corgi timer checking for released keys
 */
static void corgikbd_timer_callback(unsigned long data)
{
	struct corgikbd *corgikbd_data = (struct corgikbd *) data;
	corgikbd_scankeyboard(corgikbd_data, NULL);
}

/*
 * The hinge switches generate no interrupt so they need to be
 * monitored by a timer.
 *
 * We debounce the switches and pass them to the input system.
 *
 *  gprr == 0x00 - Keyboard with Landscape Screen
 *          0x08 - No Keyboard with Portrait Screen
 *          0x0c - Keyboard and Screen Closed
 */

#define READ_GPIO_BIT(x)    (GPLR(x) & GPIO_bit(x))
#define HINGE_STABLE_COUNT 2
static int sharpsl_hinge_state;
static int hinge_count;

static void corgikbd_hinge_timer(unsigned long data)
{
	struct corgikbd *corgikbd_data = (struct corgikbd *) data;
	unsigned long gprr;
	unsigned long flags;

	gprr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_GPRR) & (CORGI_SCP_SWA | CORGI_SCP_SWB);
	gprr |= (READ_GPIO_BIT(CORGI_GPIO_AK_INT) != 0);
	if (gprr != sharpsl_hinge_state) {
		hinge_count = 0;
		sharpsl_hinge_state = gprr;
	} else if (hinge_count < HINGE_STABLE_COUNT) {
		hinge_count++;
		if (hinge_count >= HINGE_STABLE_COUNT) {
			spin_lock_irqsave(&corgikbd_data->lock, flags);

			input_report_switch(corgikbd_data->input, SW_LID, ((sharpsl_hinge_state & CORGI_SCP_SWA) != 0));
			input_report_switch(corgikbd_data->input, SW_TABLET_MODE, ((sharpsl_hinge_state & CORGI_SCP_SWB) != 0));
			input_report_switch(corgikbd_data->input, SW_HEADPHONE_INSERT, (READ_GPIO_BIT(CORGI_GPIO_AK_INT) != 0));
			input_sync(corgikbd_data->input);

			spin_unlock_irqrestore(&corgikbd_data->lock, flags);
		}
	}
	mod_timer(&corgikbd_data->htimer, jiffies + msecs_to_jiffies(HINGE_SCAN_INTERVAL));
}

#ifdef CONFIG_PM
static int corgikbd_suspend(struct platform_device *dev, pm_message_t state)
{
	int i;
	struct corgikbd *corgikbd = platform_get_drvdata(dev);

	corgikbd->suspended = 1;
	/* strobe 0 is the power key so this can't be made an input for
	   powersaving therefore i = 1 */
	for (i = 1; i < CORGI_KEY_STROBE_NUM; i++)
		pxa_gpio_mode(CORGI_GPIO_KEY_STROBE(i) | GPIO_IN);

	return 0;
}

static int corgikbd_resume(struct platform_device *dev)
{
	int i;
	struct corgikbd *corgikbd = platform_get_drvdata(dev);

	for (i = 1; i < CORGI_KEY_STROBE_NUM; i++)
		pxa_gpio_mode(CORGI_GPIO_KEY_STROBE(i) | GPIO_OUT | GPIO_DFLT_HIGH);

	/* Upon resume, ignore the suspend key for a short while */
	corgikbd->suspend_jiffies=jiffies;
	corgikbd->suspended = 0;

	return 0;
}
#else
#define corgikbd_suspend	NULL
#define corgikbd_resume		NULL
#endif

static int __init corgikbd_probe(struct platform_device *pdev)
{
	struct corgikbd *corgikbd;
	struct input_dev *input_dev;
	int i;

	corgikbd = kzalloc(sizeof(struct corgikbd), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!corgikbd || !input_dev) {
		kfree(corgikbd);
		input_free_device(input_dev);
		return -ENOMEM;
	}

	platform_set_drvdata(pdev, corgikbd);

	corgikbd->input = input_dev;
	spin_lock_init(&corgikbd->lock);

	/* Init Keyboard rescan timer */
	init_timer(&corgikbd->timer);
	corgikbd->timer.function = corgikbd_timer_callback;
	corgikbd->timer.data = (unsigned long) corgikbd;

	/* Init Hinge Timer */
	init_timer(&corgikbd->htimer);
	corgikbd->htimer.function = corgikbd_hinge_timer;
	corgikbd->htimer.data = (unsigned long) corgikbd;

	corgikbd->suspend_jiffies=jiffies;

	memcpy(corgikbd->keycode, corgikbd_keycode, sizeof(corgikbd->keycode));

	input_dev->name = "Corgi Keyboard";
	input_dev->phys = "corgikbd/input0";
	input_dev->id.bustype = BUS_HOST;
	input_dev->id.vendor = 0x0001;
	input_dev->id.product = 0x0001;
	input_dev->id.version = 0x0100;
	input_dev->cdev.dev = &pdev->dev;
	input_dev->private = corgikbd;

	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP) | BIT(EV_PWR) | BIT(EV_SW);
	input_dev->keycode = corgikbd->keycode;
	input_dev->keycodesize = sizeof(unsigned char);
	input_dev->keycodemax = ARRAY_SIZE(corgikbd_keycode);

	for (i = 0; i < ARRAY_SIZE(corgikbd_keycode); i++)
		set_bit(corgikbd->keycode[i], input_dev->keybit);
	clear_bit(0, input_dev->keybit);
	set_bit(SW_LID, input_dev->swbit);
	set_bit(SW_TABLET_MODE, input_dev->swbit);
	set_bit(SW_HEADPHONE_INSERT, input_dev->swbit);

	input_register_device(corgikbd->input);

	mod_timer(&corgikbd->htimer, jiffies + msecs_to_jiffies(HINGE_SCAN_INTERVAL));

	/* Setup sense interrupts - RisingEdge Detect, sense lines as inputs */
	for (i = 0; i < CORGI_KEY_SENSE_NUM; i++) {
		pxa_gpio_mode(CORGI_GPIO_KEY_SENSE(i) | GPIO_IN);
		if (request_irq(CORGI_IRQ_GPIO_KEY_SENSE(i), corgikbd_interrupt,
				IRQF_DISABLED | IRQF_TRIGGER_RISING,
				"corgikbd", corgikbd))
			printk(KERN_WARNING "corgikbd: Can't get IRQ: %d!\n", i);
	}

	/* Set Strobe lines as outputs - set high */
	for (i = 0; i < CORGI_KEY_STROBE_NUM; i++)
		pxa_gpio_mode(CORGI_GPIO_KEY_STROBE(i) | GPIO_OUT | GPIO_DFLT_HIGH);

	/* Setup the headphone jack as an input */
	pxa_gpio_mode(CORGI_GPIO_AK_INT | GPIO_IN);

	return 0;
}

static int corgikbd_remove(struct platform_device *pdev)
{
	int i;
	struct corgikbd *corgikbd = platform_get_drvdata(pdev);

	for (i = 0; i < CORGI_KEY_SENSE_NUM; i++)
		free_irq(CORGI_IRQ_GPIO_KEY_SENSE(i), corgikbd);

	del_timer_sync(&corgikbd->htimer);
	del_timer_sync(&corgikbd->timer);

	input_unregister_device(corgikbd->input);

	kfree(corgikbd);

	return 0;
}

static struct platform_driver corgikbd_driver = {
	.probe		= corgikbd_probe,
	.remove		= corgikbd_remove,
	.suspend	= corgikbd_suspend,
	.resume		= corgikbd_resume,
	.driver		= {
		.name	= "corgi-keyboard",
	},
};

static int __devinit corgikbd_init(void)
{
	return platform_driver_register(&corgikbd_driver);
}

static void __exit corgikbd_exit(void)
{
	platform_driver_unregister(&corgikbd_driver);
}

module_init(corgikbd_init);
module_exit(corgikbd_exit);

MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>");
MODULE_DESCRIPTION("Corgi Keyboard Driver");
MODULE_LICENSE("GPLv2");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Keyboard driver for Sharp Corgi models (SL-C7xx)
	3	*
	4	* Copyright (c) 2004-2005 Richard Purdie
	5	*
	6	* Based on xtkbd.c/locomkbd.c
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*
	12	*/
	13
	14	#include <linux/delay.h>
d052d1be	15	#include <linux/platform_device.h>
1da177e4 LT	16	#include <linux/init.h>
	17	#include <linux/input.h>
	18	#include <linux/interrupt.h>
8240a4a4	19	#include <linux/jiffies.h>
1da177e4 LT	20	#include <linux/module.h>
1da177e4 LT	21	#include <linux/slab.h>
1da177e4 LT	22
	23	#include <asm/arch/corgi.h>
	24	#include <asm/arch/hardware.h>
	25	#include <asm/arch/pxa-regs.h>
	26	#include <asm/hardware/scoop.h>
	27
	28	#define KB_ROWS 8
	29	#define KB_COLS 12
	30	#define KB_ROWMASK(r) (1 << (r))
	31	#define SCANCODE(r,c) ( ((r)<<4) + (c) + 1 )
4872f788 RP	32	/* zero code, 124 scancodes */
4872f788 RP	33	#define NR_SCANCODES ( SCANCODE(KB_ROWS-1,KB_COLS-1) +1 +1 )
1da177e4	34
4872f788 RP	35	#define SCAN_INTERVAL (50) /* ms */
4872f788 RP	36	#define HINGE_SCAN_INTERVAL (250) /* ms */
1da177e4 LT	37
	38	#define CORGI_KEY_CALENDER KEY_F1
	39	#define CORGI_KEY_ADDRESS KEY_F2
	40	#define CORGI_KEY_FN KEY_F3
6af2cf59	41	#define CORGI_KEY_CANCEL KEY_F4
1da177e4 LT	42	#define CORGI_KEY_OFF KEY_SUSPEND
	43	#define CORGI_KEY_EXOK KEY_F5
	44	#define CORGI_KEY_EXCANCEL KEY_F6
	45	#define CORGI_KEY_EXJOGDOWN KEY_F7
	46	#define CORGI_KEY_EXJOGUP KEY_F8
	47	#define CORGI_KEY_JAP1 KEY_LEFTCTRL
	48	#define CORGI_KEY_JAP2 KEY_LEFTALT
6af2cf59	49	#define CORGI_KEY_MAIL KEY_F10
1da177e4 LT	50	#define CORGI_KEY_OK KEY_F11
1da177e4 LT	51	#define CORGI_KEY_MENU KEY_F12
1da177e4 LT	52
	53	static unsigned char corgikbd_keycode[NR_SCANCODES] = {
	54	0, /* 0 */
	55	0, KEY_1, KEY_3, KEY_5, KEY_6, KEY_7, KEY_9, KEY_0, KEY_BACKSPACE, 0, 0, 0, 0, 0, 0, 0, /* 1-16 */
	56	0, KEY_2, KEY_4, KEY_R, KEY_Y, KEY_8, KEY_I, KEY_O, KEY_P, 0, 0, 0, 0, 0, 0, 0, /* 17-32 */
	57	KEY_TAB, KEY_Q, KEY_E, KEY_T, KEY_G, KEY_U, KEY_J, KEY_K, 0, 0, 0, 0, 0, 0, 0, 0, /* 33-48 */
	58	CORGI_KEY_CALENDER, KEY_W, KEY_S, KEY_F, KEY_V, KEY_H, KEY_M, KEY_L, 0, KEY_RIGHTSHIFT, 0, 0, 0, 0, 0, 0, /* 49-64 */
	59	CORGI_KEY_ADDRESS, KEY_A, KEY_D, KEY_C, KEY_B, KEY_N, KEY_DOT, 0, KEY_ENTER, 0, KEY_LEFTSHIFT, 0, 0, 0, 0, 0, /* 65-80 */
6af2cf59 RP	60	CORGI_KEY_MAIL, KEY_Z, KEY_X, KEY_MINUS, KEY_SPACE, KEY_COMMA, 0, KEY_UP, 0, 0, 0, CORGI_KEY_FN, 0, 0, 0, 0, /* 81-96 */
6af2cf59 RP	61	KEY_SYSRQ, CORGI_KEY_JAP1, CORGI_KEY_JAP2, CORGI_KEY_CANCEL, CORGI_KEY_OK, CORGI_KEY_MENU, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0, 0, 0, 0, 0, /* 97-112 */
1da177e4	62	CORGI_KEY_OFF, CORGI_KEY_EXOK, CORGI_KEY_EXCANCEL, CORGI_KEY_EXJOGDOWN, CORGI_KEY_EXJOGUP, 0, 0, 0, 0, 0, 0, 0, /* 113-124 */
1da177e4 LT	63	};
	64
	65
	66	struct corgikbd {
	67	unsigned char keycode[ARRAY_SIZE(corgikbd_keycode)];
3c42f0c3	68	struct input_dev *input;
1da177e4	69
1da177e4	70	spinlock_t lock;
1da177e4 LT	71	struct timer_list timer;
1da177e4 LT	72	struct timer_list htimer;
8240a4a4 RP	73
	74	unsigned int suspended;
	75	unsigned long suspend_jiffies;
1da177e4 LT	76	};
1da177e4 LT	77
1da177e4 LT	78	#define KB_DISCHARGE_DELAY 10
	79	#define KB_ACTIVATE_DELAY 10
	80
	81	/* Helper functions for reading the keyboard matrix
	82	* Note: We should really be using pxa_gpio_mode to alter GPDR but it
	83	* requires a function call per GPIO bit which is excessive
	84	* when we need to access 12 bits at once multiple times.
	85	* These functions must be called within local_irq_save()/local_irq_restore()
	86	* or similar.
	87	*/
	88	static inline void corgikbd_discharge_all(void)
	89	{
948e12f0	90	/* STROBE All HiZ */
1da177e4 LT	91	GPCR2 = CORGI_GPIO_ALL_STROBE_BIT;
	92	GPDR2 &= ~CORGI_GPIO_ALL_STROBE_BIT;
	93	}
	94
	95	static inline void corgikbd_activate_all(void)
	96	{
948e12f0	97	/* STROBE ALL -> High */
1da177e4 LT	98	GPSR2 = CORGI_GPIO_ALL_STROBE_BIT;
	99	GPDR2 \|= CORGI_GPIO_ALL_STROBE_BIT;
	100
	101	udelay(KB_DISCHARGE_DELAY);
	102
948e12f0	103	/* Clear any interrupts we may have triggered when altering the GPIO lines */
1da177e4 LT	104	GEDR1 = CORGI_GPIO_HIGH_SENSE_BIT;
	105	GEDR2 = CORGI_GPIO_LOW_SENSE_BIT;
	106	}
	107
	108	static inline void corgikbd_activate_col(int col)
	109	{
948e12f0	110	/* STROBE col -> High, not col -> HiZ */
1da177e4 LT	111	GPSR2 = CORGI_GPIO_STROBE_BIT(col);
	112	GPDR2 = (GPDR2 & ~CORGI_GPIO_ALL_STROBE_BIT) \| CORGI_GPIO_STROBE_BIT(col);
	113	}
	114
	115	static inline void corgikbd_reset_col(int col)
	116	{
948e12f0	117	/* STROBE col -> Low */
1da177e4	118	GPCR2 = CORGI_GPIO_STROBE_BIT(col);
948e12f0	119	/* STROBE col -> out, not col -> HiZ */
1da177e4 LT	120	GPDR2 = (GPDR2 & ~CORGI_GPIO_ALL_STROBE_BIT) \| CORGI_GPIO_STROBE_BIT(col);
	121	}
	122
	123	#define GET_ROWS_STATUS(c) (((GPLR1 & CORGI_GPIO_HIGH_SENSE_BIT) >> CORGI_GPIO_HIGH_SENSE_RSHIFT) \| ((GPLR2 & CORGI_GPIO_LOW_SENSE_BIT) << CORGI_GPIO_LOW_SENSE_LSHIFT))
	124
	125	/*
	126	* The corgi keyboard only generates interrupts when a key is pressed.
	127	* When a key is pressed, we enable a timer which then scans the
	128	* keyboard to detect when the key is released.
	129	*/
	130
	131	/* Scan the hardware keyboard and push any changes up through the input layer */
7d12e780	132	static void corgikbd_scankeyboard(struct corgikbd *corgikbd_data)
1da177e4	133	{
948e12f0	134	unsigned int row, col, rowd;
1da177e4 LT	135	unsigned long flags;
	136	unsigned int num_pressed;
	137
8240a4a4 RP	138	if (corgikbd_data->suspended)
	139	return;
	140
1da177e4 LT	141	spin_lock_irqsave(&corgikbd_data->lock, flags);
1da177e4 LT	142
1da177e4 LT	143	num_pressed = 0;
	144	for (col = 0; col < KB_COLS; col++) {
	145	/*
	146	* Discharge the output driver capacitatance
	147	* in the keyboard matrix. (Yes it is significant..)
	148	*/
	149
	150	corgikbd_discharge_all();
	151	udelay(KB_DISCHARGE_DELAY);
	152
	153	corgikbd_activate_col(col);
	154	udelay(KB_ACTIVATE_DELAY);
	155
	156	rowd = GET_ROWS_STATUS(col);
	157	for (row = 0; row < KB_ROWS; row++) {
948e12f0 RP	158	unsigned int scancode, pressed;
948e12f0 RP	159
1da177e4	160	scancode = SCANCODE(row, col);
948e12f0 RP	161	pressed = rowd & KB_ROWMASK(row);
948e12f0 RP	162
3c42f0c3	163	input_report_key(corgikbd_data->input, corgikbd_data->keycode[scancode], pressed);
948e12f0 RP	164
948e12f0 RP	165	if (pressed)
1da177e4	166	num_pressed++;
948e12f0 RP	167
	168	if (pressed && (corgikbd_data->keycode[scancode] == CORGI_KEY_OFF)
	169	&& time_after(jiffies, corgikbd_data->suspend_jiffies + HZ)) {
3c42f0c3	170	input_event(corgikbd_data->input, EV_PWR, CORGI_KEY_OFF, 1);
948e12f0 RP	171	corgikbd_data->suspend_jiffies=jiffies;
948e12f0 RP	172	}
1da177e4 LT	173	}
	174	corgikbd_reset_col(col);
	175	}
	176
	177	corgikbd_activate_all();
	178
3c42f0c3	179	input_sync(corgikbd_data->input);
1da177e4 LT	180
	181	/* if any keys are pressed, enable the timer */
	182	if (num_pressed)
4872f788	183	mod_timer(&corgikbd_data->timer, jiffies + msecs_to_jiffies(SCAN_INTERVAL));
1da177e4 LT	184
	185	spin_unlock_irqrestore(&corgikbd_data->lock, flags);
	186	}
	187
	188	/*
	189	* corgi keyboard interrupt handler.
	190	*/
7d12e780	191	static irqreturn_t corgikbd_interrupt(int irq, void *dev_id)
1da177e4 LT	192	{
	193	struct corgikbd *corgikbd_data = dev_id;
	194
	195	if (!timer_pending(&corgikbd_data->timer)) {
	196	/ wait chattering delay /
	197	udelay(20);
7d12e780	198	corgikbd_scankeyboard(corgikbd_data);
1da177e4 LT	199	}
	200
	201	return IRQ_HANDLED;
	202	}
	203
	204	/*
	205	* corgi timer checking for released keys
	206	*/
	207	static void corgikbd_timer_callback(unsigned long data)
	208	{
	209	struct corgikbd corgikbd_data = (struct corgikbd ) data;
	210	corgikbd_scankeyboard(corgikbd_data, NULL);
	211	}
	212
	213	/*
	214	* The hinge switches generate no interrupt so they need to be
	215	* monitored by a timer.
	216	*
948e12f0 RP	217	* We debounce the switches and pass them to the input system.
	218	*
	219	* gprr == 0x00 - Keyboard with Landscape Screen
	220	* 0x08 - No Keyboard with Portrait Screen
	221	* 0x0c - Keyboard and Screen Closed
1da177e4 LT	222	*/
1da177e4 LT	223
4872f788	224	#define READ_GPIO_BIT(x) (GPLR(x) & GPIO_bit(x))
1da177e4 LT	225	#define HINGE_STABLE_COUNT 2
	226	static int sharpsl_hinge_state;
	227	static int hinge_count;
	228
	229	static void corgikbd_hinge_timer(unsigned long data)
	230	{
	231	struct corgikbd corgikbd_data = (struct corgikbd ) data;
	232	unsigned long gprr;
	233	unsigned long flags;
	234
aba5a4c0	235	gprr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_GPRR) & (CORGI_SCP_SWA \| CORGI_SCP_SWB);
4872f788	236	gprr \|= (READ_GPIO_BIT(CORGI_GPIO_AK_INT) != 0);
1da177e4 LT	237	if (gprr != sharpsl_hinge_state) {
	238	hinge_count = 0;
	239	sharpsl_hinge_state = gprr;
	240	} else if (hinge_count < HINGE_STABLE_COUNT) {
	241	hinge_count++;
	242	if (hinge_count >= HINGE_STABLE_COUNT) {
	243	spin_lock_irqsave(&corgikbd_data->lock, flags);
	244
ed8f9e2f RP	245	input_report_switch(corgikbd_data->input, SW_LID, ((sharpsl_hinge_state & CORGI_SCP_SWA) != 0));
	246	input_report_switch(corgikbd_data->input, SW_TABLET_MODE, ((sharpsl_hinge_state & CORGI_SCP_SWB) != 0));
	247	input_report_switch(corgikbd_data->input, SW_HEADPHONE_INSERT, (READ_GPIO_BIT(CORGI_GPIO_AK_INT) != 0));
3c42f0c3	248	input_sync(corgikbd_data->input);
1da177e4 LT	249
	250	spin_unlock_irqrestore(&corgikbd_data->lock, flags);
	251	}
	252	}
4872f788	253	mod_timer(&corgikbd_data->htimer, jiffies + msecs_to_jiffies(HINGE_SCAN_INTERVAL));
1da177e4 LT	254	}
1da177e4 LT	255
8240a4a4	256	#ifdef CONFIG_PM
3ae5eaec	257	static int corgikbd_suspend(struct platform_device *dev, pm_message_t state)
8240a4a4	258	{
4872f788	259	int i;
3ae5eaec	260	struct corgikbd *corgikbd = platform_get_drvdata(dev);
4872f788	261
9480e307	262	corgikbd->suspended = 1;
4872f788 RP	263	/* strobe 0 is the power key so this can't be made an input for
	264	powersaving therefore i = 1 */
	265	for (i = 1; i < CORGI_KEY_STROBE_NUM; i++)
	266	pxa_gpio_mode(CORGI_GPIO_KEY_STROBE(i) \| GPIO_IN);
9480e307	267
8240a4a4 RP	268	return 0;
	269	}
	270
3ae5eaec	271	static int corgikbd_resume(struct platform_device *dev)
8240a4a4	272	{
4872f788	273	int i;
3ae5eaec	274	struct corgikbd *corgikbd = platform_get_drvdata(dev);
9480e307	275
4872f788 RP	276	for (i = 1; i < CORGI_KEY_STROBE_NUM; i++)
	277	pxa_gpio_mode(CORGI_GPIO_KEY_STROBE(i) \| GPIO_OUT \| GPIO_DFLT_HIGH);
	278
9480e307 RK	279	/* Upon resume, ignore the suspend key for a short while */
	280	corgikbd->suspend_jiffies=jiffies;
	281	corgikbd->suspended = 0;
8240a4a4	282
8240a4a4 RP	283	return 0;
	284	}
	285	#else
	286	#define corgikbd_suspend NULL
	287	#define corgikbd_resume NULL
	288	#endif
	289
3ae5eaec	290	static int __init corgikbd_probe(struct platform_device *pdev)
1da177e4	291	{
1da177e4	292	struct corgikbd *corgikbd;
3c42f0c3 DT	293	struct input_dev *input_dev;
3c42f0c3 DT	294	int i;
1da177e4	295
a97e148a	296	corgikbd = kzalloc(sizeof(struct corgikbd), GFP_KERNEL);
3c42f0c3 DT	297	input_dev = input_allocate_device();
	298	if (!corgikbd \|\| !input_dev) {
	299	kfree(corgikbd);
	300	input_free_device(input_dev);
1da177e4	301	return -ENOMEM;
3c42f0c3	302	}
1da177e4	303
3ae5eaec	304	platform_set_drvdata(pdev, corgikbd);
1da177e4	305
3c42f0c3	306	corgikbd->input = input_dev;
aba5a4c0	307	spin_lock_init(&corgikbd->lock);
1da177e4 LT	308
	309	/* Init Keyboard rescan timer */
	310	init_timer(&corgikbd->timer);
	311	corgikbd->timer.function = corgikbd_timer_callback;
	312	corgikbd->timer.data = (unsigned long) corgikbd;
	313
	314	/* Init Hinge Timer */
	315	init_timer(&corgikbd->htimer);
	316	corgikbd->htimer.function = corgikbd_hinge_timer;
	317	corgikbd->htimer.data = (unsigned long) corgikbd;
	318
8240a4a4 RP	319	corgikbd->suspend_jiffies=jiffies;
8240a4a4 RP	320
1da177e4	321	memcpy(corgikbd->keycode, corgikbd_keycode, sizeof(corgikbd->keycode));
3c42f0c3 DT	322
	323	input_dev->name = "Corgi Keyboard";
	324	input_dev->phys = "corgikbd/input0";
	325	input_dev->id.bustype = BUS_HOST;
	326	input_dev->id.vendor = 0x0001;
	327	input_dev->id.product = 0x0001;
	328	input_dev->id.version = 0x0100;
3ae5eaec	329	input_dev->cdev.dev = &pdev->dev;
3c42f0c3 DT	330	input_dev->private = corgikbd;
	331
	332	input_dev->evbit[0] = BIT(EV_KEY) \| BIT(EV_REP) \| BIT(EV_PWR) \| BIT(EV_SW);
	333	input_dev->keycode = corgikbd->keycode;
	334	input_dev->keycodesize = sizeof(unsigned char);
	335	input_dev->keycodemax = ARRAY_SIZE(corgikbd_keycode);
	336
1da177e4	337	for (i = 0; i < ARRAY_SIZE(corgikbd_keycode); i++)
3c42f0c3 DT	338	set_bit(corgikbd->keycode[i], input_dev->keybit);
3c42f0c3 DT	339	clear_bit(0, input_dev->keybit);
ed8f9e2f RP	340	set_bit(SW_LID, input_dev->swbit);
	341	set_bit(SW_TABLET_MODE, input_dev->swbit);
	342	set_bit(SW_HEADPHONE_INSERT, input_dev->swbit);
3c42f0c3 DT	343
3c42f0c3 DT	344	input_register_device(corgikbd->input);
1da177e4	345
4872f788	346	mod_timer(&corgikbd->htimer, jiffies + msecs_to_jiffies(HINGE_SCAN_INTERVAL));
1da177e4 LT	347
	348	/* Setup sense interrupts - RisingEdge Detect, sense lines as inputs */
	349	for (i = 0; i < CORGI_KEY_SENSE_NUM; i++) {
	350	pxa_gpio_mode(CORGI_GPIO_KEY_SENSE(i) \| GPIO_IN);
	351	if (request_irq(CORGI_IRQ_GPIO_KEY_SENSE(i), corgikbd_interrupt,
dace1453	352	IRQF_DISABLED \| IRQF_TRIGGER_RISING,
9ded96f2	353	"corgikbd", corgikbd))
1da177e4	354	printk(KERN_WARNING "corgikbd: Can't get IRQ: %d!\n", i);
1da177e4 LT	355	}
	356
	357	/* Set Strobe lines as outputs - set high */
	358	for (i = 0; i < CORGI_KEY_STROBE_NUM; i++)
	359	pxa_gpio_mode(CORGI_GPIO_KEY_STROBE(i) \| GPIO_OUT \| GPIO_DFLT_HIGH);
	360
4872f788 RP	361	/* Setup the headphone jack as an input */
	362	pxa_gpio_mode(CORGI_GPIO_AK_INT \| GPIO_IN);
	363
1da177e4 LT	364	return 0;
	365	}
	366
3ae5eaec	367	static int corgikbd_remove(struct platform_device *pdev)
1da177e4 LT	368	{
1da177e4 LT	369	int i;
3ae5eaec	370	struct corgikbd *corgikbd = platform_get_drvdata(pdev);
1da177e4 LT	371
	372	for (i = 0; i < CORGI_KEY_SENSE_NUM; i++)
	373	free_irq(CORGI_IRQ_GPIO_KEY_SENSE(i), corgikbd);
	374
	375	del_timer_sync(&corgikbd->htimer);
	376	del_timer_sync(&corgikbd->timer);
	377
3c42f0c3	378	input_unregister_device(corgikbd->input);
1da177e4 LT	379
	380	kfree(corgikbd);
	381
	382	return 0;
	383	}
	384
3ae5eaec	385	static struct platform_driver corgikbd_driver = {
1da177e4 LT	386	.probe = corgikbd_probe,
1da177e4 LT	387	.remove = corgikbd_remove,
8240a4a4 RP	388	.suspend = corgikbd_suspend,
8240a4a4 RP	389	.resume = corgikbd_resume,
3ae5eaec RK	390	.driver = {
	391	.name = "corgi-keyboard",
	392	},
1da177e4 LT	393	};
	394
	395	static int __devinit corgikbd_init(void)
	396	{
3ae5eaec	397	return platform_driver_register(&corgikbd_driver);
1da177e4 LT	398	}
	399
	400	static void __exit corgikbd_exit(void)
	401	{
3ae5eaec	402	platform_driver_unregister(&corgikbd_driver);
1da177e4 LT	403	}
	404
	405	module_init(corgikbd_init);
	406	module_exit(corgikbd_exit);
	407
	408	MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>");
	409	MODULE_DESCRIPTION("Corgi Keyboard Driver");
	410	MODULE_LICENSE("GPLv2");