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Commit 93e9012f authored by Dmitry Eremin-Solenikov's avatar Dmitry Eremin-Solenikov Committed by Dmitry Torokhov
Browse files

Input: add Tosa keyboard driver 



Add keyboard support on tosa (Sharp Zaurus SL-6000x).
Largely based on patches by Dirk Opfer.

Signed-off-by: default avatarDmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
parent 52fe0cdb

arch/arm/mach-pxa/tosa.c

+43 −0
Original line number Diff line number Diff line
@@ -21,6 +21,8 @@ 
#include <linux/mmc/host.h>

#include <linux/pm.h>

#include <linux/delay.h>

#include <linux/gpio_keys.h>

#include <linux/input.h>



#include <asm/setup.h>

#include <asm/memory.h>
@@ -253,6 +255,46 @@ static struct platform_device tosakbd_device = { 
	.id		= -1,

};



static struct gpio_keys_button tosa_gpio_keys[] = {

	{

		.type	= EV_PWR,

		.code	= KEY_SUSPEND,

		.gpio	= TOSA_GPIO_ON_KEY,

		.desc	= "On key",

		.wakeup	= 1,

		.active_low = 1,

	},

	{

		.type	= EV_KEY,

		.code	= TOSA_KEY_RECORD,

		.gpio	= TOSA_GPIO_RECORD_BTN,

		.desc	= "Record Button",

		.wakeup	= 1,

		.active_low = 1,

	},

	{

		.type	= EV_KEY,

		.code	= TOSA_KEY_SYNC,

		.gpio	= TOSA_GPIO_SYNC,

		.desc	= "Sync Button",

		.wakeup	= 1,

		.active_low = 1,

	},

};



static struct gpio_keys_platform_data tosa_gpio_keys_platform_data = {

	.buttons	= tosa_gpio_keys,

	.nbuttons	= ARRAY_SIZE(tosa_gpio_keys),

};



static struct platform_device tosa_gpio_keys_device = {

	.name	= "gpio-keys",

	.id	= -1,

	.dev	= {

		.platform_data	= &tosa_gpio_keys_platform_data,

	},

};



/*

 * Tosa LEDs

 */
@@ -265,6 +307,7 @@ static struct platform_device *devices[] __initdata = { 
	&tosascoop_device,

	&tosascoop_jc_device,

	&tosakbd_device,

	&tosa_gpio_keys_device,

	&tosaled_device,

};

drivers/input/keyboard/Kconfig

+21 −0
Original line number Diff line number Diff line
@@ -154,6 +154,27 @@ config KEYBOARD_SPITZ 
	  To compile this driver as a module, choose M here: the

	  module will be called spitzkbd.



config KEYBOARD_TOSA

	tristate "Tosa keyboard"

	depends on MACH_TOSA

	default y

	help

	  Say Y here to enable the keyboard on the Sharp Zaurus SL-6000x (Tosa)



	  To compile this driver as a module, choose M here: the

	  module will be called tosakbd.



config KEYBOARD_TOSA_USE_EXT_KEYCODES

	bool "Tosa keyboard: use extended keycodes"

	depends on KEYBOARD_TOSA

	default n

	help

	  Say Y here to enable the tosa keyboard driver to generate extended

	  (>= 127) keycodes. Be aware, that they can't be correctly interpreted

	  by either console keyboard driver or by Kdrive keybd driver.



	  Say Y only if you know, what you are doing!



config KEYBOARD_AMIGA

	tristate "Amiga keyboard"

	depends on AMIGA

drivers/input/keyboard/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ obj-$(CONFIG_KEYBOARD_NEWTON) += newtonkbd.o 
obj-$(CONFIG_KEYBOARD_STOWAWAY)		+= stowaway.o

obj-$(CONFIG_KEYBOARD_CORGI)		+= corgikbd.o

obj-$(CONFIG_KEYBOARD_SPITZ)		+= spitzkbd.o

obj-$(CONFIG_KEYBOARD_TOSA)		+= tosakbd.o

obj-$(CONFIG_KEYBOARD_HIL)		+= hil_kbd.o

obj-$(CONFIG_KEYBOARD_HIL_OLD)		+= hilkbd.o

obj-$(CONFIG_KEYBOARD_OMAP)		+= omap-keypad.o

drivers/input/keyboard/tosakbd.c

0 → 100644
+415 −0
Original line number Diff line number Diff line 
/*

 *  Keyboard driver for Sharp Tosa models (SL-6000x)

 *

 *  Copyright (c) 2005 Dirk Opfer

 *  Copyright (c) 2007 Dmitry Baryshkov

 *

 *  Based on xtkbd.c/locomkbd.c/corgikbd.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/kernel.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/input.h>

#include <linux/delay.h>

#include <linux/interrupt.h>



#include <asm/arch/gpio.h>

#include <asm/arch/tosa.h>



#define KB_ROWMASK(r)		(1 << (r))

#define SCANCODE(r, c)		(((r)<<4) + (c) + 1)

#define NR_SCANCODES		SCANCODE(TOSA_KEY_SENSE_NUM - 1, TOSA_KEY_STROBE_NUM - 1) + 1



#define SCAN_INTERVAL		(HZ/10)



#define KB_DISCHARGE_DELAY	10

#define KB_ACTIVATE_DELAY	10



static unsigned int tosakbd_keycode[NR_SCANCODES] = {

0,

0, KEY_W, 0, 0, 0, KEY_K, KEY_BACKSPACE, KEY_P,

0, 0, 0, 0, 0, 0, 0, 0,

KEY_Q, KEY_E, KEY_T, KEY_Y, 0, KEY_O, KEY_I, KEY_COMMA,

0, 0, 0, 0, 0, 0, 0, 0,

KEY_A, KEY_D, KEY_G, KEY_U, 0, KEY_L, KEY_ENTER, KEY_DOT,

0, 0, 0, 0, 0, 0, 0, 0,

KEY_Z, KEY_C, KEY_V, KEY_J, TOSA_KEY_ADDRESSBOOK, TOSA_KEY_CANCEL, TOSA_KEY_CENTER, TOSA_KEY_OK,

KEY_LEFTSHIFT, 0, 0, 0, 0, 0, 0, 0,

KEY_S, KEY_R, KEY_B, KEY_N, TOSA_KEY_CALENDAR, TOSA_KEY_HOMEPAGE, KEY_LEFTCTRL, TOSA_KEY_LIGHT,

0, KEY_RIGHTSHIFT, 0, 0, 0, 0, 0, 0,

KEY_TAB, KEY_SLASH, KEY_H, KEY_M, TOSA_KEY_MENU, 0, KEY_UP, 0,

0, 0, TOSA_KEY_FN, 0, 0, 0, 0, 0,

KEY_X, KEY_F, KEY_SPACE, KEY_APOSTROPHE, TOSA_KEY_MAIL, KEY_LEFT, KEY_DOWN, KEY_RIGHT,

0, 0, 0,

};



struct tosakbd {

	unsigned int keycode[ARRAY_SIZE(tosakbd_keycode)];

	struct input_dev *input;



	spinlock_t lock; /* protect kbd scanning */

	struct timer_list timer;

};





/* 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.

 */

#define GET_ROWS_STATUS(c)	((GPLR2 & TOSA_GPIO_ALL_SENSE_BIT) >> TOSA_GPIO_ALL_SENSE_RSHIFT)



static inline void tosakbd_discharge_all(void)

{

	/* STROBE All HiZ */

	GPCR1  = TOSA_GPIO_HIGH_STROBE_BIT;

	GPDR1 &= ~TOSA_GPIO_HIGH_STROBE_BIT;

	GPCR2  = TOSA_GPIO_LOW_STROBE_BIT;

	GPDR2 &= ~TOSA_GPIO_LOW_STROBE_BIT;

}



static inline void tosakbd_activate_all(void)

{

	/* STROBE ALL -> High */

	GPSR1  = TOSA_GPIO_HIGH_STROBE_BIT;

	GPDR1 |= TOSA_GPIO_HIGH_STROBE_BIT;

	GPSR2  = TOSA_GPIO_LOW_STROBE_BIT;

	GPDR2 |= TOSA_GPIO_LOW_STROBE_BIT;



	udelay(KB_DISCHARGE_DELAY);



	/* STATE CLEAR */

	GEDR2 |= TOSA_GPIO_ALL_SENSE_BIT;

}



static inline void tosakbd_activate_col(int col)

{

	if (col <= 5) {

		/* STROBE col -> High, not col -> HiZ */

		GPSR1 = TOSA_GPIO_STROBE_BIT(col);

		GPDR1 = (GPDR1 & ~TOSA_GPIO_HIGH_STROBE_BIT) | TOSA_GPIO_STROBE_BIT(col);

	} else {

		/* STROBE col -> High, not col -> HiZ */

		GPSR2 = TOSA_GPIO_STROBE_BIT(col);

		GPDR2 = (GPDR2 & ~TOSA_GPIO_LOW_STROBE_BIT) | TOSA_GPIO_STROBE_BIT(col);

	}

}



static inline void tosakbd_reset_col(int col)

{

	if (col <= 5) {

		/* STROBE col -> Low */

		GPCR1 = TOSA_GPIO_STROBE_BIT(col);

		/* STROBE col -> out, not col -> HiZ */

		GPDR1 = (GPDR1 & ~TOSA_GPIO_HIGH_STROBE_BIT) | TOSA_GPIO_STROBE_BIT(col);

	} else {

		/* STROBE col -> Low */

		GPCR2 = TOSA_GPIO_STROBE_BIT(col);

		/* STROBE col -> out, not col -> HiZ */

		GPDR2 = (GPDR2 & ~TOSA_GPIO_LOW_STROBE_BIT) | TOSA_GPIO_STROBE_BIT(col);

	}

}

/*

 * The tosa keyboard only generates interrupts when a key is pressed.

 * So when a key is pressed, we enable a timer.  This timer scans the

 * keyboard, and this is how we detect when the key is released.

 */



/* Scan the hardware keyboard and push any changes up through the input layer */

static void tosakbd_scankeyboard(struct platform_device *dev)

{

	struct tosakbd *tosakbd = platform_get_drvdata(dev);

	unsigned int row, col, rowd;

	unsigned long flags;

	unsigned int num_pressed = 0;



	spin_lock_irqsave(&tosakbd->lock, flags);



	for (col = 0; col < TOSA_KEY_STROBE_NUM; col++) {

		/*

		 * Discharge the output driver capacitatance

		 * in the keyboard matrix. (Yes it is significant..)

		 */

		tosakbd_discharge_all();

		udelay(KB_DISCHARGE_DELAY);



		tosakbd_activate_col(col);

		udelay(KB_ACTIVATE_DELAY);



		rowd = GET_ROWS_STATUS(col);



		for (row = 0; row < TOSA_KEY_SENSE_NUM; row++) {

			unsigned int scancode, pressed;

			scancode = SCANCODE(row, col);

			pressed = rowd & KB_ROWMASK(row);



			if (pressed && !tosakbd->keycode[scancode])

				dev_warn(&dev->dev,

						"unhandled scancode: 0x%02x\n",

						scancode);



			input_report_key(tosakbd->input,

					tosakbd->keycode[scancode],

					pressed);

			if (pressed)

				num_pressed++;

		}



		tosakbd_reset_col(col);

	}



	tosakbd_activate_all();



	input_sync(tosakbd->input);



	/* if any keys are pressed, enable the timer */

	if (num_pressed)

		mod_timer(&tosakbd->timer, jiffies + SCAN_INTERVAL);



	spin_unlock_irqrestore(&tosakbd->lock, flags);

}



/*

 * tosa keyboard interrupt handler.

 */

static irqreturn_t tosakbd_interrupt(int irq, void *__dev)

{

	struct platform_device *dev = __dev;

	struct tosakbd *tosakbd = platform_get_drvdata(dev);



	if (!timer_pending(&tosakbd->timer)) {

		/** wait chattering delay **/

		udelay(20);

		tosakbd_scankeyboard(dev);

	}



	return IRQ_HANDLED;

}



/*

 * tosa timer checking for released keys

 */

static void tosakbd_timer_callback(unsigned long __dev)

{

	struct platform_device *dev = (struct platform_device *)__dev;

	tosakbd_scankeyboard(dev);

}



#ifdef CONFIG_PM

static int tosakbd_suspend(struct platform_device *dev, pm_message_t state)

{

	struct tosakbd *tosakbd = platform_get_drvdata(dev);



	del_timer_sync(&tosakbd->timer);



	return 0;

}



static int tosakbd_resume(struct platform_device *dev)

{

	tosakbd_scankeyboard(dev);



	return 0;

}

#else

#define tosakbd_suspend		NULL

#define tosakbd_resume		NULL

#endif



static int __devinit tosakbd_probe(struct platform_device *pdev) {



	int i;

	struct tosakbd *tosakbd;

	struct input_dev *input_dev;

	int error;



	tosakbd = kzalloc(sizeof(struct tosakbd), GFP_KERNEL);

	if (!tosakbd)

		return -ENOMEM;



	input_dev = input_allocate_device();

	if (!input_dev) {

		kfree(tosakbd);

		return -ENOMEM;

	}



	platform_set_drvdata(pdev, tosakbd);



	spin_lock_init(&tosakbd->lock);



	/* Init Keyboard rescan timer */

	init_timer(&tosakbd->timer);

	tosakbd->timer.function = tosakbd_timer_callback;

	tosakbd->timer.data = (unsigned long) pdev;



	tosakbd->input = input_dev;



	input_set_drvdata(input_dev, tosakbd);

	input_dev->name = "Tosa Keyboard";

	input_dev->phys = "tosakbd/input0";

	input_dev->dev.parent = &pdev->dev;



	input_dev->id.bustype = BUS_HOST;

	input_dev->id.vendor = 0x0001;

	input_dev->id.product = 0x0001;

	input_dev->id.version = 0x0100;



	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);

	input_dev->keycode = tosakbd->keycode;

	input_dev->keycodesize = sizeof(unsigned int);

	input_dev->keycodemax = ARRAY_SIZE(tosakbd_keycode);



	memcpy(tosakbd->keycode, tosakbd_keycode, sizeof(tosakbd_keycode));



	for (i = 0; i < ARRAY_SIZE(tosakbd_keycode); i++)

		__set_bit(tosakbd->keycode[i], input_dev->keybit);

	clear_bit(0, input_dev->keybit);



	/* Setup sense interrupts - RisingEdge Detect, sense lines as inputs */

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

		int gpio = TOSA_GPIO_KEY_SENSE(i);

		int irq;

		error = gpio_request(gpio, "tosakbd");

		if (error < 0) {

			printk(KERN_ERR "tosakbd: failed to request GPIO %d, "

				" error %d\n", gpio, error);

			goto fail;

		}



		error = gpio_direction_input(TOSA_GPIO_KEY_SENSE(i));

		if (error < 0) {

			printk(KERN_ERR "tosakbd: failed to configure input"

				" direction for GPIO %d, error %d\n",

				gpio, error);

			gpio_free(gpio);

			goto fail;

		}



		irq = gpio_to_irq(gpio);

		if (irq < 0) {

			error = irq;

			printk(KERN_ERR "gpio-keys: Unable to get irq number"

				" for GPIO %d, error %d\n",

				gpio, error);

			gpio_free(gpio);

			goto fail;

		}



		error = request_irq(irq, tosakbd_interrupt,

					IRQF_DISABLED | IRQF_TRIGGER_RISING,

					"tosakbd", pdev);



		if (error) {

			printk("tosakbd: Can't get IRQ: %d: error %d!\n",

					irq, error);

			gpio_free(gpio);

			goto fail;

		}

	}



	/* Set Strobe lines as outputs - set high */

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

		int gpio = TOSA_GPIO_KEY_STROBE(i);

		error = gpio_request(gpio, "tosakbd");

		if (error < 0) {

			printk(KERN_ERR "tosakbd: failed to request GPIO %d, "

				" error %d\n", gpio, error);

			goto fail2;

		}



		error = gpio_direction_output(gpio, 1);

		if (error < 0) {

			printk(KERN_ERR "tosakbd: failed to configure input"

				" direction for GPIO %d, error %d\n",

				gpio, error);

			gpio_free(gpio);

			goto fail;

		}



	}



	error = input_register_device(input_dev);

	if (error) {

		printk(KERN_ERR "tosakbd: Unable to register input device, "

			"error: %d\n", error);

		goto fail;

	}



	printk(KERN_INFO "input: Tosa Keyboard Registered\n");



	return 0;



fail2:

	while (--i >= 0)

		gpio_free(TOSA_GPIO_KEY_STROBE(i));



	i = TOSA_KEY_SENSE_NUM;

fail:

	while (--i >= 0) {

		free_irq(gpio_to_irq(TOSA_GPIO_KEY_SENSE(i)), pdev);

		gpio_free(TOSA_GPIO_KEY_SENSE(i));

	}



	platform_set_drvdata(pdev, NULL);

	input_free_device(input_dev);

	kfree(tosakbd);



	return error;

}



static int __devexit tosakbd_remove(struct platform_device *dev) {



	int i;

	struct tosakbd *tosakbd = platform_get_drvdata(dev);



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

		gpio_free(TOSA_GPIO_KEY_STROBE(i));



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

		free_irq(gpio_to_irq(TOSA_GPIO_KEY_SENSE(i)), dev);

		gpio_free(TOSA_GPIO_KEY_SENSE(i));

	}



	del_timer_sync(&tosakbd->timer);



	input_unregister_device(tosakbd->input);



	kfree(tosakbd);



	return 0;

}



static struct platform_driver tosakbd_driver = {

	.probe		= tosakbd_probe,

	.remove		= __devexit_p(tosakbd_remove),

	.suspend	= tosakbd_suspend,

	.resume		= tosakbd_resume,

	.driver		= {

		.name	= "tosa-keyboard",

	},

};



static int __devinit tosakbd_init(void)

{

	return platform_driver_register(&tosakbd_driver);

}



static void __exit tosakbd_exit(void)

{

	platform_driver_unregister(&tosakbd_driver);

}



module_init(tosakbd_init);

module_exit(tosakbd_exit);



MODULE_AUTHOR("Dirk Opfer <Dirk@Opfer-Online.de>");

MODULE_DESCRIPTION("Tosa Keyboard Driver");

MODULE_LICENSE("GPL v2");

include/asm-arm/arch-pxa/tosa.h

+30 −0
Original line number Diff line number Diff line
@@ -163,4 +163,34 @@ 


extern struct platform_device tosascoop_jc_device;

extern struct platform_device tosascoop_device;



#define TOSA_KEY_SYNC		KEY_102ND /* ??? */





#ifndef CONFIG_KEYBOARD_TOSA_USE_EXT_KEYCODES

#define TOSA_KEY_RECORD		KEY_YEN

#define TOSA_KEY_ADDRESSBOOK	KEY_KATAKANA

#define TOSA_KEY_CANCEL		KEY_ESC

#define TOSA_KEY_CENTER		KEY_HIRAGANA

#define TOSA_KEY_OK		KEY_HENKAN

#define TOSA_KEY_CALENDAR	KEY_KATAKANAHIRAGANA

#define TOSA_KEY_HOMEPAGE	KEY_HANGEUL

#define TOSA_KEY_LIGHT		KEY_MUHENKAN

#define TOSA_KEY_MENU		KEY_HANJA

#define TOSA_KEY_FN		KEY_RIGHTALT

#define TOSA_KEY_MAIL		KEY_ZENKAKUHANKAKU

#else

#define TOSA_KEY_RECORD		KEY_RECORD

#define TOSA_KEY_ADDRESSBOOK	KEY_ADDRESSBOOK

#define TOSA_KEY_CANCEL		KEY_CANCEL

#define TOSA_KEY_CENTER		KEY_SELECT /* ??? */

#define TOSA_KEY_OK		KEY_OK

#define TOSA_KEY_CALENDAR	KEY_CALENDAR

#define TOSA_KEY_HOMEPAGE	KEY_HOMEPAGE

#define TOSA_KEY_LIGHT		KEY_KBDILLUMTOGGLE

#define TOSA_KEY_MENU		KEY_MENU

#define TOSA_KEY_FN		KEY_FN

#define TOSA_KEY_MAIL		KEY_MAIL

#endif



#endif /* _ASM_ARCH_TOSA_H_ */