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 /* 14 */ 15 16 #include <linux/module.h> 17 #include <linux/init.h> 18 #include <linux/input.h> 19 #include <linux/delay.h> 20 #include <linux/interrupt.h> 21 #include <linux/keyboard.h> 22 #include <linux/platform_device.h> 23 24 #include <asm/amigaints.h> 25 #include <asm/amigahw.h> 26 #include <asm/irq.h> 27 28 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 29 MODULE_DESCRIPTION("Amiga keyboard driver"); 30 MODULE_LICENSE("GPL"); 31 32 #ifdef CONFIG_HW_CONSOLE 33 static unsigned char amikbd_keycode[0x78] __initdata = { 34 [0] = KEY_GRAVE, 35 [1] = KEY_1, 36 [2] = KEY_2, 37 [3] = KEY_3, 38 [4] = KEY_4, 39 [5] = KEY_5, 40 [6] = KEY_6, 41 [7] = KEY_7, 42 [8] = KEY_8, 43 [9] = KEY_9, 44 [10] = KEY_0, 45 [11] = KEY_MINUS, 46 [12] = KEY_EQUAL, 47 [13] = KEY_BACKSLASH, 48 [15] = KEY_KP0, 49 [16] = KEY_Q, 50 [17] = KEY_W, 51 [18] = KEY_E, 52 [19] = KEY_R, 53 [20] = KEY_T, 54 [21] = KEY_Y, 55 [22] = KEY_U, 56 [23] = KEY_I, 57 [24] = KEY_O, 58 [25] = KEY_P, 59 [26] = KEY_LEFTBRACE, 60 [27] = KEY_RIGHTBRACE, 61 [29] = KEY_KP1, 62 [30] = KEY_KP2, 63 [31] = KEY_KP3, 64 [32] = KEY_A, 65 [33] = KEY_S, 66 [34] = KEY_D, 67 [35] = KEY_F, 68 [36] = KEY_G, 69 [37] = KEY_H, 70 [38] = KEY_J, 71 [39] = KEY_K, 72 [40] = KEY_L, 73 [41] = KEY_SEMICOLON, 74 [42] = KEY_APOSTROPHE, 75 [43] = KEY_BACKSLASH, 76 [45] = KEY_KP4, 77 [46] = KEY_KP5, 78 [47] = KEY_KP6, 79 [48] = KEY_102ND, 80 [49] = KEY_Z, 81 [50] = KEY_X, 82 [51] = KEY_C, 83 [52] = KEY_V, 84 [53] = KEY_B, 85 [54] = KEY_N, 86 [55] = KEY_M, 87 [56] = KEY_COMMA, 88 [57] = KEY_DOT, 89 [58] = KEY_SLASH, 90 [60] = KEY_KPDOT, 91 [61] = KEY_KP7, 92 [62] = KEY_KP8, 93 [63] = KEY_KP9, 94 [64] = KEY_SPACE, 95 [65] = KEY_BACKSPACE, 96 [66] = KEY_TAB, 97 [67] = KEY_KPENTER, 98 [68] = KEY_ENTER, 99 [69] = KEY_ESC, 100 [70] = KEY_DELETE, 101 [74] = KEY_KPMINUS, 102 [76] = KEY_UP, 103 [77] = KEY_DOWN, 104 [78] = KEY_RIGHT, 105 [79] = KEY_LEFT, 106 [80] = KEY_F1, 107 [81] = KEY_F2, 108 [82] = KEY_F3, 109 [83] = KEY_F4, 110 [84] = KEY_F5, 111 [85] = KEY_F6, 112 [86] = KEY_F7, 113 [87] = KEY_F8, 114 [88] = KEY_F9, 115 [89] = KEY_F10, 116 [90] = KEY_KPLEFTPAREN, 117 [91] = KEY_KPRIGHTPAREN, 118 [92] = KEY_KPSLASH, 119 [93] = KEY_KPASTERISK, 120 [94] = KEY_KPPLUS, 121 [95] = KEY_HELP, 122 [96] = KEY_LEFTSHIFT, 123 [97] = KEY_RIGHTSHIFT, 124 [98] = KEY_CAPSLOCK, 125 [99] = KEY_LEFTCTRL, 126 [100] = KEY_LEFTALT, 127 [101] = KEY_RIGHTALT, 128 [102] = KEY_LEFTMETA, 129 [103] = KEY_RIGHTMETA 130 }; 131 132 static void __init amikbd_init_console_keymaps(void) 133 { 134 /* We can spare 512 bytes on stack for temp_map in init path. */ 135 unsigned short temp_map[NR_KEYS]; 136 int i, j; 137 138 for (i = 0; i < MAX_NR_KEYMAPS; i++) { 139 if (!key_maps[i]) 140 continue; 141 memset(temp_map, 0, sizeof(temp_map)); 142 for (j = 0; j < 0x78; j++) { 143 if (!amikbd_keycode[j]) 144 continue; 145 temp_map[j] = key_maps[i][amikbd_keycode[j]]; 146 } 147 for (j = 0; j < NR_KEYS; j++) { 148 if (!temp_map[j]) 149 temp_map[j] = 0xf200; 150 } 151 memcpy(key_maps[i], temp_map, sizeof(temp_map)); 152 } 153 } 154 #else /* !CONFIG_HW_CONSOLE */ 155 static inline void amikbd_init_console_keymaps(void) {} 156 #endif /* !CONFIG_HW_CONSOLE */ 157 158 static const char *amikbd_messages[8] = { 159 [0] = KERN_ALERT "amikbd: Ctrl-Amiga-Amiga reset warning!!\n", 160 [1] = KERN_WARNING "amikbd: keyboard lost sync\n", 161 [2] = KERN_WARNING "amikbd: keyboard buffer overflow\n", 162 [3] = KERN_WARNING "amikbd: keyboard controller failure\n", 163 [4] = KERN_ERR "amikbd: keyboard selftest failure\n", 164 [5] = KERN_INFO "amikbd: initiate power-up key stream\n", 165 [6] = KERN_INFO "amikbd: terminate power-up key stream\n", 166 [7] = KERN_WARNING "amikbd: keyboard interrupt\n" 167 }; 168 169 static irqreturn_t amikbd_interrupt(int irq, void *data) 170 { 171 struct input_dev *dev = data; 172 unsigned char scancode, down; 173 174 scancode = ~ciaa.sdr; /* get and invert scancode (keyboard is active low) */ 175 ciaa.cra |= 0x40; /* switch SP pin to output for handshake */ 176 udelay(85); /* wait until 85 us have expired */ 177 ciaa.cra &= ~0x40; /* switch CIA serial port to input mode */ 178 179 down = !(scancode & 1); /* lowest bit is release bit */ 180 scancode >>= 1; 181 182 if (scancode < 0x78) { /* scancodes < 0x78 are keys */ 183 if (scancode == 98) { /* CapsLock is a toggle switch key on Amiga */ 184 input_report_key(dev, scancode, 1); 185 input_report_key(dev, scancode, 0); 186 } else { 187 input_report_key(dev, scancode, down); 188 } 189 190 input_sync(dev); 191 } else /* scancodes >= 0x78 are error codes */ 192 printk(amikbd_messages[scancode - 0x78]); 193 194 return IRQ_HANDLED; 195 } 196 197 static int __init amikbd_probe(struct platform_device *pdev) 198 { 199 struct input_dev *dev; 200 int i, err; 201 202 dev = input_allocate_device(); 203 if (!dev) { 204 dev_err(&pdev->dev, "Not enough memory for input device\n"); 205 return -ENOMEM; 206 } 207 208 dev->name = pdev->name; 209 dev->phys = "amikbd/input0"; 210 dev->id.bustype = BUS_AMIGA; 211 dev->id.vendor = 0x0001; 212 dev->id.product = 0x0001; 213 dev->id.version = 0x0100; 214 dev->dev.parent = &pdev->dev; 215 216 dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); 217 218 for (i = 0; i < 0x78; i++) 219 set_bit(i, dev->keybit); 220 221 amikbd_init_console_keymaps(); 222 223 ciaa.cra &= ~0x41; /* serial data in, turn off TA */ 224 err = request_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt, 0, "amikbd", 225 dev); 226 if (err) 227 goto fail2; 228 229 err = input_register_device(dev); 230 if (err) 231 goto fail3; 232 233 platform_set_drvdata(pdev, dev); 234 235 return 0; 236 237 fail3: free_irq(IRQ_AMIGA_CIAA_SP, dev); 238 fail2: input_free_device(dev); 239 return err; 240 } 241 242 static int __exit amikbd_remove(struct platform_device *pdev) 243 { 244 struct input_dev *dev = platform_get_drvdata(pdev); 245 246 free_irq(IRQ_AMIGA_CIAA_SP, dev); 247 input_unregister_device(dev); 248 return 0; 249 } 250 251 static struct platform_driver amikbd_driver = { 252 .remove = __exit_p(amikbd_remove), 253 .driver = { 254 .name = "amiga-keyboard", 255 }, 256 }; 257 258 module_platform_driver_probe(amikbd_driver, amikbd_probe); 259 260 MODULE_ALIAS("platform:amiga-keyboard"); 261