mirror of https://gitee.com/openkylin/linux.git
183 lines
4.8 KiB
C
183 lines
4.8 KiB
C
/*
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* Keyboard driver for the AAED-2000 dev board
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*
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* Copyright (c) 2006 Nicolas Bellido Y Ortega
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*
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* Based on corgikbd.c
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <linux/init.h>
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#include <linux/input-polldev.h>
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#include <linux/interrupt.h>
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#include <linux/jiffies.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <asm/arch/hardware.h>
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#include <asm/arch/aaed2000.h>
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#define KB_ROWS 12
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#define KB_COLS 8
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#define KB_ROWMASK(r) (1 << (r))
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#define SCANCODE(r,c) (((c) * KB_ROWS) + (r))
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#define NR_SCANCODES (KB_COLS * KB_ROWS)
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#define SCAN_INTERVAL (50) /* ms */
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#define KB_ACTIVATE_DELAY (20) /* us */
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static unsigned char aaedkbd_keycode[NR_SCANCODES] = {
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KEY_9, KEY_0, KEY_MINUS, KEY_EQUAL, KEY_BACKSPACE, 0, KEY_SPACE, KEY_KP6, 0, KEY_KPDOT, 0, 0,
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KEY_K, KEY_M, KEY_O, KEY_DOT, KEY_SLASH, 0, KEY_F, 0, 0, 0, KEY_LEFTSHIFT, 0,
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KEY_I, KEY_P, KEY_LEFTBRACE, KEY_RIGHTBRACE, KEY_BACKSLASH, 0, 0, 0, 0, 0, KEY_RIGHTSHIFT, 0,
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KEY_8, KEY_L, KEY_SEMICOLON, KEY_APOSTROPHE, KEY_ENTER, 0, 0, 0, 0, 0, 0, 0,
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KEY_J, KEY_H, KEY_B, KEY_KP8, KEY_KP4, 0, KEY_C, KEY_D, KEY_S, KEY_A, 0, KEY_CAPSLOCK,
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KEY_Y, KEY_U, KEY_N, KEY_T, 0, 0, KEY_R, KEY_E, KEY_W, KEY_Q, 0, KEY_TAB,
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KEY_7, KEY_6, KEY_G, 0, KEY_5, 0, KEY_4, KEY_3, KEY_2, KEY_1, 0, KEY_GRAVE,
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0, 0, KEY_COMMA, 0, KEY_KP2, 0, KEY_V, KEY_LEFTALT, KEY_X, KEY_Z, 0, KEY_LEFTCTRL
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};
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struct aaedkbd {
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unsigned char keycode[ARRAY_SIZE(aaedkbd_keycode)];
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struct input_polled_dev *poll_dev;
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int kbdscan_state[KB_COLS];
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int kbdscan_count[KB_COLS];
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};
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#define KBDSCAN_STABLE_COUNT 2
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static void aaedkbd_report_col(struct aaedkbd *aaedkbd,
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unsigned int col, unsigned int rowd)
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{
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unsigned int scancode, pressed;
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unsigned int row;
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for (row = 0; row < KB_ROWS; row++) {
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scancode = SCANCODE(row, col);
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pressed = rowd & KB_ROWMASK(row);
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input_report_key(aaedkbd->poll_dev->input,
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aaedkbd->keycode[scancode], pressed);
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}
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}
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/* Scan the hardware keyboard and push any changes up through the input layer */
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static void aaedkbd_poll(struct input_polled_dev *dev)
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{
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struct aaedkbd *aaedkbd = dev->private;
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unsigned int col, rowd;
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col = 0;
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do {
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AAEC_GPIO_KSCAN = col + 8;
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udelay(KB_ACTIVATE_DELAY);
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rowd = AAED_EXT_GPIO & AAED_EGPIO_KBD_SCAN;
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if (rowd != aaedkbd->kbdscan_state[col]) {
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aaedkbd->kbdscan_count[col] = 0;
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aaedkbd->kbdscan_state[col] = rowd;
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} else if (++aaedkbd->kbdscan_count[col] >= KBDSCAN_STABLE_COUNT) {
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aaedkbd_report_col(aaedkbd, col, rowd);
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col++;
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}
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} while (col < KB_COLS);
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AAEC_GPIO_KSCAN = 0x07;
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input_sync(dev->input);
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}
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static int __devinit aaedkbd_probe(struct platform_device *pdev)
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{
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struct aaedkbd *aaedkbd;
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struct input_polled_dev *poll_dev;
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struct input_dev *input_dev;
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int i;
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int error;
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aaedkbd = kzalloc(sizeof(struct aaedkbd), GFP_KERNEL);
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poll_dev = input_allocate_polled_device();
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if (!aaedkbd || !poll_dev) {
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error = -ENOMEM;
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goto fail;
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}
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platform_set_drvdata(pdev, aaedkbd);
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aaedkbd->poll_dev = poll_dev;
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memcpy(aaedkbd->keycode, aaedkbd_keycode, sizeof(aaedkbd->keycode));
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poll_dev->private = aaedkbd;
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poll_dev->poll = aaedkbd_poll;
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poll_dev->poll_interval = SCAN_INTERVAL;
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input_dev = poll_dev->input;
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input_dev->name = "AAED-2000 Keyboard";
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input_dev->phys = "aaedkbd/input0";
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input_dev->id.bustype = BUS_HOST;
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input_dev->id.vendor = 0x0001;
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input_dev->id.product = 0x0001;
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input_dev->id.version = 0x0100;
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input_dev->dev.parent = &pdev->dev;
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input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
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input_dev->keycode = aaedkbd->keycode;
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input_dev->keycodesize = sizeof(unsigned char);
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input_dev->keycodemax = ARRAY_SIZE(aaedkbd_keycode);
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for (i = 0; i < ARRAY_SIZE(aaedkbd_keycode); i++)
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set_bit(aaedkbd->keycode[i], input_dev->keybit);
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clear_bit(0, input_dev->keybit);
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error = input_register_polled_device(aaedkbd->poll_dev);
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if (error)
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goto fail;
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return 0;
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fail: kfree(aaedkbd);
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input_free_polled_device(poll_dev);
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return error;
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}
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static int __devexit aaedkbd_remove(struct platform_device *pdev)
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{
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struct aaedkbd *aaedkbd = platform_get_drvdata(pdev);
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input_unregister_polled_device(aaedkbd->poll_dev);
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input_free_polled_device(aaedkbd->poll_dev);
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kfree(aaedkbd);
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return 0;
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}
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static struct platform_driver aaedkbd_driver = {
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.probe = aaedkbd_probe,
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.remove = __devexit_p(aaedkbd_remove),
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.driver = {
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.name = "aaed2000-keyboard",
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},
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};
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static int __init aaedkbd_init(void)
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{
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return platform_driver_register(&aaedkbd_driver);
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}
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static void __exit aaedkbd_exit(void)
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{
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platform_driver_unregister(&aaedkbd_driver);
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}
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module_init(aaedkbd_init);
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module_exit(aaedkbd_exit);
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MODULE_AUTHOR("Nicolas Bellido Y Ortega");
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MODULE_DESCRIPTION("AAED-2000 Keyboard Driver");
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MODULE_LICENSE("GPLv2");
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