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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 <[email protected]>");
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");