diff options
Diffstat (limited to 'drivers/input/keyboard/jornada720_kbd.c')
| -rw-r--r-- | drivers/input/keyboard/jornada720_kbd.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/drivers/input/keyboard/jornada720_kbd.c b/drivers/input/keyboard/jornada720_kbd.c new file mode 100644 index 00000000000000..f785b9964b3ddb --- /dev/null +++ b/drivers/input/keyboard/jornada720_kbd.c @@ -0,0 +1,159 @@ +/* + * drivers/input/keyboard/jornada720_kbd.c + * + * Jornada 720 keyboard interface + * + * Copyright (C) 2006 Filip Zyzniewski <filip.zyzniewski@tefnet.pl> + * Copyright (C) 2004 Alex Lange <chicken@handhelds.org> + * + * 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/input.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/device.h> + +#include <asm/hardware.h> +#include <asm/arch/jornada720_mcu.h> + +MODULE_AUTHOR("Alex Lange <chicken@handhelds.org>"); +MODULE_DESCRIPTION("Jornada 720 keyboard driver"); +MODULE_LICENSE("GPL"); + +/* + * HP Documentation referred in this file: + * http://www.jlime.com/downloads/development/docs/jornada7xx/jornada720.txt + */ + +static struct input_dev *dev; + +static char jornada720_kbd_name[] = "Jornada 720 keyboard"; + +/* line 227 of HP's doc */ +static unsigned char jornada720_normal_keymap[128] = { + 0, 1, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 87, KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_MUTE, + 0, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 0, 0, 0, + 0, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 43, 14, 0, 0, 0, + 0, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, KEY_LEFTBRACE, KEY_RIGHTBRACE, 0, 0, 0, + 0, 44, 45, 46, 47, 48, 49, 50, 51, 52, KEY_KPMINUS, 40, 28, 0, 0, 0, + 0, 15, 0, 42, 0, 40, 0, 0, 0, 0, 103, 0, 54, 0, 0, 0, + 0, 0, 0, 0, 0, 56, KEY_GRAVE, 0, 0, 105, 108, 106, 0, 0, 0, 0, + 0, 55, 29, 0, 57, 0, 0, 0, 53, 111, 0, 0, 0, 0, 0, 116, +}; + +static irqreturn_t jornada720_kbd_interrupt(int irq, void *dev_id) +{ + int key, keycode; + int count, mcu_data=0; + + /* start of dialogue with the MCU (line 217 of HP's doc) */ + if(jornada720_mcu_start(jornada720_mcu_GetScanKeyCode)) { + printk(KERN_WARNING "jornada720_kbd: GetScanKeyCode failed\n"); + jornada720_mcu_end(); + return IRQ_HANDLED; + } + + /* amount of key events (line 218 of HP's doc) */ + count = jornada720_mcu_read(); + + while (count-- > 0) { + /* keycode (line 219 of HP's doc) */ + key = mcu_data = jornada720_mcu_read(); + + if (key < 0) { + jornada720_mcu_end(); + return IRQ_HANDLED; + } + + /* scancode > 128 means key release (line 223 of HP's doc) */ + if (key > 128) + key = key - 128; + + keycode = jornada720_normal_keymap[key]; + + if (mcu_data < 128) { + /* key pressed (line 223 of HP's doc) */ + input_report_key(dev, keycode, 1); + input_sync(dev); + } + else { + /* key released (line 223 of HP's doc) */ + input_report_key(dev, keycode, 0); + input_sync(dev); + } + } + + + jornada720_mcu_end(); + + return IRQ_HANDLED; +} + +static int jornada720_kbd_probe(struct device *_dev) +{ + int i, ret; + + dev = input_allocate_device(); + if (!dev) + return -ENOMEM; + + dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP); + dev->keybit[LONG(KEY_SUSPEND)] |= BIT(KEY_SUSPEND); + + for ( i=0 ; i<=128 ; i++ ) { + if (jornada720_normal_keymap[i]) + set_bit(jornada720_normal_keymap[i], dev->keybit); + } + + dev->name = jornada720_kbd_name; + + /* keyboard is on GPIO0 (line 215 of HP's doc) */ + ret = request_irq(IRQ_GPIO0, + jornada720_kbd_interrupt, + IRQF_DISABLED | IRQF_TRIGGER_FALLING, + jornada720_kbd_name, dev); + if (ret) { + printk(KERN_WARNING "Unable to grab IRQ for %s: %d\n", jornada720_kbd_name, ret); + input_free_device(dev); + return ret; + } + + input_register_device(dev); + + return 0; + +} + +static int jornada720_kbd_remove(struct device *_dev) +{ + free_irq(IRQ_GPIO0, dev); + input_unregister_device(dev); + return 0; +} + +static struct device_driver jornada720_kbd_driver = { + .name = jornada720_mcu_bus_id_kbd, + .bus = &jornada720_mcu_bus_type, + .probe = jornada720_kbd_probe, + .remove = jornada720_kbd_remove, + .owner = THIS_MODULE +}; + +static int __init jornada720_kbd_init(void) +{ + return driver_register(&jornada720_kbd_driver); +} + +static void __exit jornada720_kbd_exit(void) +{ + driver_unregister(&jornada720_kbd_driver); +} + +module_init(jornada720_kbd_init); +module_exit(jornada720_kbd_exit); |