/*
* Copyright (c) 2000-2001 Vojtech Pavlik
*
* Based on the work of:
* Hamish Macdonald
*/
/*
* Amiga keyboard driver for Linux/m68k
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Should you need to contact me, the author, you can do so either by
* e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/keyboard.h>
#include <linux/platform_device.h>
#include <asm/amigaints.h>
#include <asm/amigahw.h>
#include <asm/irq.h>
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION("Amiga keyboard driver");
MODULE_LICENSE("GPL");
#ifdef CONFIG_HW_CONSOLE
static unsigned char amikbd_keycode[0x78] __initdata = {
[0] = KEY_GRAVE,
[1] = KEY_1,
[2] = KEY_2,
[3] = KEY_3,
[4] = KEY_4,
[5] = KEY_5,
[6] = KEY_6,
[7] = KEY_7,
[8] = KEY_8,
[9] = KEY_9,
[10] = KEY_0,
[11] = KEY_MINUS,
[12] = KEY_EQUAL,
[13] = KEY_BACKSLASH,
[15] = KEY_KP0,
[16] = KEY_Q,
[17] = KEY_W,
[18] = KEY_E,
[19] = KEY_R,
[20] = KEY_T,
[21] = KEY_Y,
[22] = KEY_U,
[23] = KEY_I,
[24] = KEY_O,
[25] = KEY_P,
[26] = KEY_LEFTBRACE,
[27] = KEY_RIGHTBRACE,
[29] = KEY_KP1,
[30] = KEY_KP2,
[31] = KEY_KP3,
[32] = KEY_A,
[33] = KEY_S,
[34] = KEY_D,
[35] = KEY_F,
[36] = KEY_G,
[37] = KEY_H,
[38] = KEY_J,
[39] = KEY_K,
[40] = KEY_L,
[41] = KEY_SEMICOLON,
[42] = KEY_APOSTROPHE,
[43] = KEY_BACKSLASH,
[45] = KEY_KP4,
[46] = KEY_KP5,
[47] = KEY_KP6,
[48] = KEY_102ND,
[49] = KEY_Z,
[50] = KEY_X,
[51] = KEY_C,
[52] = KEY_V,
[53] = KEY_B,
[54] = KEY_N,
[55] = KEY_M,
[56] = KEY_COMMA,
[57] = KEY_DOT,
[58] = KEY_SLASH,
[60] = KEY_KPDOT,
[61] = KEY_KP7,
[62] = KEY_KP8,
[63] = KEY_KP9,
[64] = KEY_SPACE,
[65] = KEY_BACKSPACE,
[66] = KEY_TAB,
[67] = KEY_KPENTER,
[68] = KEY_ENTER,
[69] = KEY_ESC,
[70] = KEY_DELETE,
[74] = KEY_KPMINUS,
[76] = KEY_UP,
[77] = KEY_DOWN,
[78] = KEY_RIGHT,
[79] = KEY_LEFT,
[80] = KEY_F1,
[81] = KEY_F2,
[82] = KEY_F3,
[83] = KEY_F4,
[84] = KEY_F5,
[85] = KEY_F6,
[86] = KEY_F7,
[87] = KEY_F8,
[88] = KEY_F9,
[89] = KEY_F10,
[90] = KEY_KPLEFTPAREN,
[91] = KEY_KPRIGHTPAREN,
[92] = KEY_KPSLASH,
[93] = KEY_KPASTERISK,
[94] = KEY_KPPLUS,
[95] = KEY_HELP,
[96] = KEY_LEFTSHIFT,
[97] = KEY_RIGHTSHIFT,
[98] = KEY_CAPSLOCK,
[99] = KEY_LEFTCTRL,
[100] = KEY_LEFTALT,
[101] = KEY_RIGHTALT,
[102] = KEY_LEFTMETA,
[103] = KEY_RIGHTMETA
};
static void __init amikbd_init_console_keymaps(void)
{
/* We can spare 512 bytes on stack for temp_map in init path. */
unsigned short temp_map[NR_KEYS];
int i, j;
for (i = 0; i < MAX_NR_KEYMAPS; i++) {
if (!key_maps[i])
continue;
memset(temp_map, 0, sizeof(temp_map));
for (j = 0; j < 0x78; j++) {
if (!amikbd_keycode[j])
continue;
temp_map[j] = key_maps[i][amikbd_keycode[j]];
}
for (j = 0; j < NR_KEYS; j++) {
if (!temp_map[j])
temp_map[j] = 0xf200;
}
memcpy(key_maps[i], temp_map, sizeof(temp_map));
}
}
#else /* !CONFIG_HW_CONSOLE */
static inline void amikbd_init_console_keymaps(void) {}
#endif /* !CONFIG_HW_CONSOLE */
static const char *amikbd_messages[8] = {
[0] = KERN_ALERT "amikbd: Ctrl-Amiga-Amiga reset warning!!
",
[1] = KERN_WARNING "amikbd: keyboard lost sync
",
[2] = KERN_WARNING "amikbd: keyboard buffer overflow
",
[3] = KERN_WARNING "amikbd: keyboard controller failure
",
[4] = KERN_ERR "amikbd: keyboard selftest failure
",
[5] = KERN_INFO "amikbd: initiate power-up key stream
",
[6] = KERN_INFO "amikbd: terminate power-up key stream
",
[7] = KERN_WARNING "amikbd: keyboard interrupt
"
};
static irqreturn_t amikbd_interrupt(int irq, void *data)
{
struct input_dev *dev = data;
unsigned char scancode, down;
scancode = ~ciaa.sdr; /* get and invert scancode (keyboard is active low) */
ciaa.cra |= 0x40; /* switch SP pin to output for handshake */
udelay(85); /* wait until 85 us have expired */
ciaa.cra &= ~0x40; /* switch CIA serial port to input mode */
down = !(scancode & 1); /* lowest bit is release bit */
scancode >>= 1;
if (scancode < 0x78) { /* scancodes < 0x78 are keys */
if (scancode == 98) { /* CapsLock is a toggle switch key on Amiga */
input_report_key(dev, scancode, 1);
input_report_key(dev, scancode, 0);
} else {
input_report_key(dev, scancode, down);
}
input_sync(dev);
} else /* scancodes >= 0x78 are error codes */
printk(amikbd_messages[scancode - 0x78]);
return IRQ_HANDLED;
}
static int __init amikbd_probe(struct platform_device *pdev)
{
struct input_dev *dev;
int i, err;
dev = input_allocate_device();
if (!dev) {
dev_err(&pdev->dev, "Not enough memory for input device
");
return -ENOMEM;
}
dev->name = pdev->name;
dev->phys = "amikbd/input0";
dev->id.bustype = BUS_AMIGA;
dev->id.vendor = 0x0001;
dev->id.product = 0x0001;
dev->id.version = 0x0100;
dev->dev.parent = &pdev->dev;
dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
for (i = 0; i < 0x78; i++)
set_bit(i, dev->keybit);
amikbd_init_console_keymaps();
ciaa.cra &= ~0x41; /* serial data in, turn off TA */
err = request_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt, 0, "amikbd",
dev);
if (err)
goto fail2;
err = input_register_device(dev);
if (err)
goto fail3;
/*
probe函数中定义的局部变量，如果我想在其他地方使用它怎么办呢？ 这就需要把它保存起来。
内核提供了这个方法，使用函数platform_set_drvdata()可以将ndev保存成平台总线设备的私有数据。
以后再 要使用它时只需调用platform_get_drvdata()就可以了。
*/
platform_set_drvdata(pdev, dev);
return 0;
fail3: free_irq(IRQ_AMIGA_CIAA_SP, dev);
fail2: input_free_device(dev);
return err;
}
static int __exit amikbd_remove(struct platform_device *pdev)
{
struct input_dev *dev = platform_get_drvdata(pdev);
free_irq(IRQ_AMIGA_CIAA_SP, dev);
input_unregister_device(dev);
return 0;
}
static struct platform_driver amikbd_driver = {
.remove = __exit_p(amikbd_remove),
.driver = {
.name = "amiga-keyboard",
},
};
module_platform_driver_probe(amikbd_driver, amikbd_probe);
MODULE_ALIAS("platform:amiga-keyboard");