1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 *  Copyright (c) 2000-2001 Vojtech Pavlik
4 *
5 *  Based on the work of:
6 *	Hamish Macdonald
7 */
8
9/*
10 * Amiga keyboard driver for Linux/m68k
11 */
12
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>
20
21#include <asm/amigaints.h>
22#include <asm/amigahw.h>
23#include <asm/irq.h>
24
25MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
26MODULE_DESCRIPTION("Amiga keyboard driver");
27MODULE_LICENSE("GPL");
28
29#ifdef CONFIG_VT
30static unsigned char amikbd_keycode[0x78] __initdata = {
31	[0]	 = KEY_GRAVE,
32	[1]	 = KEY_1,
33	[2]	 = KEY_2,
34	[3]	 = KEY_3,
35	[4]	 = KEY_4,
36	[5]	 = KEY_5,
37	[6]	 = KEY_6,
38	[7]	 = KEY_7,
39	[8]	 = KEY_8,
40	[9]	 = KEY_9,
41	[10]	 = KEY_0,
42	[11]	 = KEY_MINUS,
43	[12]	 = KEY_EQUAL,
44	[13]	 = KEY_BACKSLASH,
45	[15]	 = KEY_KP0,
46	[16]	 = KEY_Q,
47	[17]	 = KEY_W,
48	[18]	 = KEY_E,
49	[19]	 = KEY_R,
50	[20]	 = KEY_T,
51	[21]	 = KEY_Y,
52	[22]	 = KEY_U,
53	[23]	 = KEY_I,
54	[24]	 = KEY_O,
55	[25]	 = KEY_P,
56	[26]	 = KEY_LEFTBRACE,
57	[27]	 = KEY_RIGHTBRACE,
58	[29]	 = KEY_KP1,
59	[30]	 = KEY_KP2,
60	[31]	 = KEY_KP3,
61	[32]	 = KEY_A,
62	[33]	 = KEY_S,
63	[34]	 = KEY_D,
64	[35]	 = KEY_F,
65	[36]	 = KEY_G,
66	[37]	 = KEY_H,
67	[38]	 = KEY_J,
68	[39]	 = KEY_K,
69	[40]	 = KEY_L,
70	[41]	 = KEY_SEMICOLON,
71	[42]	 = KEY_APOSTROPHE,
72	[43]	 = KEY_BACKSLASH,
73	[45]	 = KEY_KP4,
74	[46]	 = KEY_KP5,
75	[47]	 = KEY_KP6,
76	[48]	 = KEY_102ND,
77	[49]	 = KEY_Z,
78	[50]	 = KEY_X,
79	[51]	 = KEY_C,
80	[52]	 = KEY_V,
81	[53]	 = KEY_B,
82	[54]	 = KEY_N,
83	[55]	 = KEY_M,
84	[56]	 = KEY_COMMA,
85	[57]	 = KEY_DOT,
86	[58]	 = KEY_SLASH,
87	[60]	 = KEY_KPDOT,
88	[61]	 = KEY_KP7,
89	[62]	 = KEY_KP8,
90	[63]	 = KEY_KP9,
91	[64]	 = KEY_SPACE,
92	[65]	 = KEY_BACKSPACE,
93	[66]	 = KEY_TAB,
94	[67]	 = KEY_KPENTER,
95	[68]	 = KEY_ENTER,
96	[69]	 = KEY_ESC,
97	[70]	 = KEY_DELETE,
98	[74]	 = KEY_KPMINUS,
99	[76]	 = KEY_UP,
100	[77]	 = KEY_DOWN,
101	[78]	 = KEY_RIGHT,
102	[79]	 = KEY_LEFT,
103	[80]	 = KEY_F1,
104	[81]	 = KEY_F2,
105	[82]	 = KEY_F3,
106	[83]	 = KEY_F4,
107	[84]	 = KEY_F5,
108	[85]	 = KEY_F6,
109	[86]	 = KEY_F7,
110	[87]	 = KEY_F8,
111	[88]	 = KEY_F9,
112	[89]	 = KEY_F10,
113	[90]	 = KEY_KPLEFTPAREN,
114	[91]	 = KEY_KPRIGHTPAREN,
115	[92]	 = KEY_KPSLASH,
116	[93]	 = KEY_KPASTERISK,
117	[94]	 = KEY_KPPLUS,
118	[95]	 = KEY_HELP,
119	[96]	 = KEY_LEFTSHIFT,
120	[97]	 = KEY_RIGHTSHIFT,
121	[98]	 = KEY_CAPSLOCK,
122	[99]	 = KEY_LEFTCTRL,
123	[100]	 = KEY_LEFTALT,
124	[101]	 = KEY_RIGHTALT,
125	[102]	 = KEY_LEFTMETA,
126	[103]	 = KEY_RIGHTMETA
127};
128
129static void __init amikbd_init_console_keymaps(void)
130{
131	/* We can spare 512 bytes on stack for temp_map in init path. */
132	unsigned short temp_map[NR_KEYS];
133	int i, j;
134
135	for (i = 0; i < MAX_NR_KEYMAPS; i++) {
136		if (!key_maps[i])
137			continue;
138		memset(temp_map, 0, sizeof(temp_map));
139		for (j = 0; j < 0x78; j++) {
140			if (!amikbd_keycode[j])
141				continue;
142			temp_map[j] = key_maps[i][amikbd_keycode[j]];
143		}
144		for (j = 0; j < NR_KEYS; j++) {
145			if (!temp_map[j])
146				temp_map[j] = 0xf200;
147		}
148		memcpy(key_maps[i], temp_map, sizeof(temp_map));
149	}
150}
151#else /* !CONFIG_VT */
152static inline void amikbd_init_console_keymaps(void) {}
153#endif /* !CONFIG_VT */
154
155static 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"
164};
165
166static irqreturn_t amikbd_interrupt(int irq, void *data)
167{
168	struct input_dev *dev = data;
169	unsigned char scancode, down;
170
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 */
175
176	down = !(scancode & 1);		/* lowest bit is release bit */
177	scancode >>= 1;
178
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);
183		} else {
184			input_report_key(dev, scancode, down);
185		}
186
187		input_sync(dev);
188	} else				/* scancodes >= 0x78 are error codes */
189		printk(amikbd_messages[scancode - 0x78]);
190
191	return IRQ_HANDLED;
192}
193
194static int __init amikbd_probe(struct platform_device *pdev)
195{
196	struct input_dev *dev;
197	int i, err;
198
199	dev = devm_input_allocate_device(&pdev->dev);
200	if (!dev) {
201		dev_err(&pdev->dev, "Not enough memory for input device\n");
202		return -ENOMEM;
203	}
204
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;
211
212	dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
213
214	for (i = 0; i < 0x78; i++)
215		set_bit(i, dev->keybit);
216
217	amikbd_init_console_keymaps();
218
219	ciaa.cra &= ~0x41;	 /* serial data in, turn off TA */
220	err = devm_request_irq(&pdev->dev, IRQ_AMIGA_CIAA_SP, amikbd_interrupt,
221			       0, "amikbd", dev);
222	if (err)
223		return err;
224
225	err = input_register_device(dev);
226	if (err)
227		return err;
228
229	platform_set_drvdata(pdev, dev);
230
231	return 0;
232}
233
234static struct platform_driver amikbd_driver = {
235	.driver   = {
236		.name	= "amiga-keyboard",
237	},
238};
239
240module_platform_driver_probe(amikbd_driver, amikbd_probe);
241
242MODULE_ALIAS("platform:amiga-keyboard");
243