1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (c) 2000-2001 Vojtech Pavlik
5 * Based on the work of:
10 * Amiga keyboard driver for Linux/m68k
13 #include <linux/module.h>
14 #include <linux/init.h>
15 #include <linux/input.h>
16 #include <linux/delay.h>
17 #include <linux/interrupt.h>
18 #include <linux/keyboard.h>
19 #include <linux/platform_device.h>
21 #include <asm/amigaints.h>
22 #include <asm/amigahw.h>
25 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
26 MODULE_DESCRIPTION("Amiga keyboard driver");
27 MODULE_LICENSE("GPL");
29 #ifdef CONFIG_HW_CONSOLE
30 static unsigned char amikbd_keycode[0x78] __initdata = {
57 [27] = KEY_RIGHTBRACE,
71 [42] = KEY_APOSTROPHE,
113 [90] = KEY_KPLEFTPAREN,
114 [91] = KEY_KPRIGHTPAREN,
116 [93] = KEY_KPASTERISK,
119 [96] = KEY_LEFTSHIFT,
120 [97] = KEY_RIGHTSHIFT,
124 [101] = KEY_RIGHTALT,
125 [102] = KEY_LEFTMETA,
126 [103] = KEY_RIGHTMETA
129 static void __init amikbd_init_console_keymaps(void)
131 /* We can spare 512 bytes on stack for temp_map in init path. */
132 unsigned short temp_map[NR_KEYS];
135 for (i = 0; i < MAX_NR_KEYMAPS; i++) {
138 memset(temp_map, 0, sizeof(temp_map));
139 for (j = 0; j < 0x78; j++) {
140 if (!amikbd_keycode[j])
142 temp_map[j] = key_maps[i][amikbd_keycode[j]];
144 for (j = 0; j < NR_KEYS; j++) {
146 temp_map[j] = 0xf200;
148 memcpy(key_maps[i], temp_map, sizeof(temp_map));
151 #else /* !CONFIG_HW_CONSOLE */
152 static inline void amikbd_init_console_keymaps(void) {}
153 #endif /* !CONFIG_HW_CONSOLE */
155 static const char *amikbd_messages[8] = {
156 [0] = KERN_ALERT "amikbd: Ctrl-Amiga-Amiga reset warning!!\n",
157 [1] = KERN_WARNING "amikbd: keyboard lost sync\n",
158 [2] = KERN_WARNING "amikbd: keyboard buffer overflow\n",
159 [3] = KERN_WARNING "amikbd: keyboard controller failure\n",
160 [4] = KERN_ERR "amikbd: keyboard selftest failure\n",
161 [5] = KERN_INFO "amikbd: initiate power-up key stream\n",
162 [6] = KERN_INFO "amikbd: terminate power-up key stream\n",
163 [7] = KERN_WARNING "amikbd: keyboard interrupt\n"
166 static irqreturn_t amikbd_interrupt(int irq, void *data)
168 struct input_dev *dev = data;
169 unsigned char scancode, down;
171 scancode = ~ciaa.sdr; /* get and invert scancode (keyboard is active low) */
172 ciaa.cra |= 0x40; /* switch SP pin to output for handshake */
173 udelay(85); /* wait until 85 us have expired */
174 ciaa.cra &= ~0x40; /* switch CIA serial port to input mode */
176 down = !(scancode & 1); /* lowest bit is release bit */
179 if (scancode < 0x78) { /* scancodes < 0x78 are keys */
180 if (scancode == 98) { /* CapsLock is a toggle switch key on Amiga */
181 input_report_key(dev, scancode, 1);
182 input_report_key(dev, scancode, 0);
184 input_report_key(dev, scancode, down);
188 } else /* scancodes >= 0x78 are error codes */
189 printk(amikbd_messages[scancode - 0x78]);
194 static int __init amikbd_probe(struct platform_device *pdev)
196 struct input_dev *dev;
199 dev = devm_input_allocate_device(&pdev->dev);
201 dev_err(&pdev->dev, "Not enough memory for input device\n");
205 dev->name = pdev->name;
206 dev->phys = "amikbd/input0";
207 dev->id.bustype = BUS_AMIGA;
208 dev->id.vendor = 0x0001;
209 dev->id.product = 0x0001;
210 dev->id.version = 0x0100;
212 dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
214 for (i = 0; i < 0x78; i++)
215 set_bit(i, dev->keybit);
217 amikbd_init_console_keymaps();
219 ciaa.cra &= ~0x41; /* serial data in, turn off TA */
220 err = devm_request_irq(&pdev->dev, IRQ_AMIGA_CIAA_SP, amikbd_interrupt,
225 err = input_register_device(dev);
229 platform_set_drvdata(pdev, dev);
234 static struct platform_driver amikbd_driver = {
236 .name = "amiga-keyboard",
240 module_platform_driver_probe(amikbd_driver, amikbd_probe);
242 MODULE_ALIAS("platform:amiga-keyboard");