按键芯片jornada680 linux驱动程序

标签：__ jornadakbd 驱动程序 unsigned dev jornada680 KEY linux input

drivers/input/keyboard/jornada680_kbd.c
HP Jornada 620/660/680/690 scan keyboard platform driver
Based on hp680_keyb.c
Copyright © 2006 Paul Mundt
Copyright © 2005 Andriy Skulysh
Split from drivers/input/keyboard/hp600_keyb.c
Copyright © 2000 Yaegashi Takeshi (hp6xx kbd scan routine and translation table)
Copyright © 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/device.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 <linux/slab.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 = (__raw_readw(PDCR) & (~0xcc0c));
ec_static = (__raw_readw(PECR) & (~0xf0cf));

for (i = 0; i < 8; i++) {
	/* disable output for all but the one we want to scan */
	__raw_writew((dc_static | *y++), PDCR);
	__raw_writew((ec_static | *y++), PECR);
	udelay(5);

	/* Get scanline row */
	__raw_writeb(*t++, PDDR);
	__raw_writeb(*t++, PEDR);
	udelay(50);

	/* Read data */
	*s++ = __raw_readb(PCDR);
	*s++ = __raw_readb(PFDR);
}
/* Scan no lines */
__raw_writeb(0xff, PDDR);
__raw_writeb(0xff, PEDR);

/* Enable all scanlines */
__raw_writew((dc_static | (0x5555 & 0xcc0c)),PDCR);
__raw_writew((ec_static | (0x5555 & 0xf0cf)),PECR);

/* Ignore extra keys and events */
*s++ = __raw_readb(PGDR);
*s++ = __raw_readb(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 jornada680kbd_probe(struct platform_device *pdev)
{
struct jornadakbd *jornadakbd;
struct input_polled_dev *poll_dev;
struct input_dev *input_dev;
int i, error;

jornadakbd = devm_kzalloc(&pdev->dev, sizeof(struct jornadakbd),
			  GFP_KERNEL);
if (!jornadakbd)
	return -ENOMEM;

poll_dev = devm_input_allocate_polled_device(&pdev->dev);
if (!poll_dev) {
	dev_err(&pdev->dev, "failed to allocate polled input device\n");
	return -ENOMEM;
}

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) {
	dev_err(&pdev->dev, "failed to register polled input device\n");
	return error;
}

return 0;

}

static struct platform_driver jornada680kbd_driver = {
.driver = {
.name = “jornada680_kbd”,
},
.probe = jornada680kbd_probe,
};
module_platform_driver(jornada680kbd_driver);

MODULE_AUTHOR(“xxx”);
MODULE_DESCRIPTION(“HP Jornada 620/660/680/690 Keyboard Driver”);
MODULE_LICENSE(“GPL v2”);
MODULE_ALIAS(“platform:jornada680_kbd”);

标签：__,jornadakbd,驱动程序,unsigned,dev,jornada680,KEY,linux,input
From： https://blog.csdn.net/baidu_37552881/article/details/144049788

按键芯片jornada680 linux驱动程序

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按键 芯片jornada680 linux驱动程序

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按键芯片jornada680 linux驱动程序