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 25 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 26 MODULE_DESCRIPTION("Amiga keyboard driver"); 27 MODULE_LICENSE("GPL"); 28 29 #ifdef CONFIG_VT 30 static 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 }; 128 129 static 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 */ 152 static inline void amikbd_init_console_keymaps(void) {} 153 #endif /* !CONFIG_VT */ 154 155 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" 164 }; 165 166 static 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 } 193 194 static 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 } 233 234 static struct platform_driver amikbd_driver = { 235 .driver = { 236 .name = "amiga-keyboard", 237 }, 238 }; 239 240 module_platform_driver_probe(amikbd_driver, amikbd_probe); 241 242 MODULE_ALIAS("platform:amiga-keyboard"); 243