1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * drivers/input/keyboard/jornada680_kbd.c 4 * 5 * HP Jornada 620/660/680/690 scan keyboard platform driver 6 * Copyright (C) 2007 Kristoffer Ericson <Kristoffer.Ericson@gmail.com> 7 * 8 * Based on hp680_keyb.c 9 * Copyright (C) 2006 Paul Mundt 10 * Copyright (C) 2005 Andriy Skulysh 11 * Split from drivers/input/keyboard/hp600_keyb.c 12 * Copyright (C) 2000 Yaegashi Takeshi (hp6xx kbd scan routine and translation table) 13 * Copyright (C) 2000 Niibe Yutaka (HP620 Keyb translation table) 14 */ 15 16 #include <linux/device.h> 17 #include <linux/input.h> 18 #include <linux/interrupt.h> 19 #include <linux/jiffies.h> 20 #include <linux/kernel.h> 21 #include <linux/module.h> 22 #include <linux/platform_device.h> 23 #include <linux/slab.h> 24 25 #include <asm/delay.h> 26 #include <asm/io.h> 27 28 #define PCCR 0xa4000104 29 #define PDCR 0xa4000106 30 #define PECR 0xa4000108 31 #define PFCR 0xa400010a 32 #define PCDR 0xa4000124 33 #define PDDR 0xa4000126 34 #define PEDR 0xa4000128 35 #define PFDR 0xa400012a 36 #define PGDR 0xa400012c 37 #define PHDR 0xa400012e 38 #define PJDR 0xa4000130 39 #define PKDR 0xa4000132 40 #define PLDR 0xa4000134 41 42 static const unsigned short jornada_scancodes[] = { 43 /* PTD1 */ KEY_CAPSLOCK, KEY_MACRO, KEY_LEFTCTRL, 0, KEY_ESC, KEY_KP5, 0, 0, /* 1 -> 8 */ 44 KEY_F1, KEY_F2, KEY_F3, KEY_F8, KEY_F7, KEY_F6, KEY_F4, KEY_F5, /* 9 -> 16 */ 45 /* PTD5 */ KEY_SLASH, KEY_APOSTROPHE, KEY_ENTER, 0, KEY_Z, 0, 0, 0, /* 17 -> 24 */ 46 KEY_X, KEY_C, KEY_V, KEY_DOT, KEY_COMMA, KEY_M, KEY_B, KEY_N, /* 25 -> 32 */ 47 /* PTD7 */ KEY_KP2, KEY_KP6, KEY_KP3, 0, 0, 0, 0, 0, /* 33 -> 40 */ 48 KEY_F10, KEY_RO, KEY_F9, KEY_KP4, KEY_NUMLOCK, KEY_SCROLLLOCK, KEY_LEFTALT, KEY_HANJA, /* 41 -> 48 */ 49 /* PTE0 */ KEY_KATAKANA, KEY_KP0, KEY_GRAVE, 0, KEY_FINANCE, 0, 0, 0, /* 49 -> 56 */ 50 KEY_KPMINUS, KEY_HIRAGANA, KEY_SPACE, KEY_KPDOT, KEY_VOLUMEUP, 249, 0, 0, /* 57 -> 64 */ 51 /* PTE1 */ KEY_SEMICOLON, KEY_RIGHTBRACE, KEY_BACKSLASH, 0, KEY_A, 0, 0, 0, /* 65 -> 72 */ 52 KEY_S, KEY_D, KEY_F, KEY_L, KEY_K, KEY_J, KEY_G, KEY_H, /* 73 -> 80 */ 53 /* PTE3 */ KEY_KP8, KEY_LEFTMETA, KEY_RIGHTSHIFT, 0, KEY_TAB, 0, 0, 0, /* 81 -> 88 */ 54 0, KEY_LEFTSHIFT, KEY_KP7, KEY_KP9, KEY_KP1, KEY_F11, KEY_KPPLUS, KEY_KPASTERISK, /* 89 -> 96 */ 55 /* PTE6 */ KEY_P, KEY_LEFTBRACE, KEY_BACKSPACE, 0, KEY_Q, 0, 0, 0, /* 97 -> 104 */ 56 KEY_W, KEY_E, KEY_R, KEY_O, KEY_I, KEY_U, KEY_T, KEY_Y, /* 105 -> 112 */ 57 /* PTE7 */ KEY_0, KEY_MINUS, KEY_EQUAL, 0, KEY_1, 0, 0, 0, /* 113 -> 120 */ 58 KEY_2, KEY_3, KEY_4, KEY_9, KEY_8, KEY_7, KEY_5, KEY_6, /* 121 -> 128 */ 59 /* **** */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 60 0, 0, 0, 0, 0 61 }; 62 63 #define JORNADA_SCAN_SIZE 18 64 65 struct jornadakbd { 66 struct input_dev *input; 67 unsigned short keymap[ARRAY_SIZE(jornada_scancodes)]; 68 unsigned char length; 69 unsigned char old_scan[JORNADA_SCAN_SIZE]; 70 unsigned char new_scan[JORNADA_SCAN_SIZE]; 71 }; 72 73 static void jornada_parse_kbd(struct jornadakbd *jornadakbd) 74 { 75 struct input_dev *input_dev = jornadakbd->input; 76 unsigned short *keymap = jornadakbd->keymap; 77 unsigned int sync_me = 0; 78 unsigned int i, j; 79 80 for (i = 0; i < JORNADA_SCAN_SIZE; i++) { 81 unsigned char new = jornadakbd->new_scan[i]; 82 unsigned char old = jornadakbd->old_scan[i]; 83 unsigned int xor = new ^ old; 84 85 if (xor == 0) 86 continue; 87 88 for (j = 0; j < 8; j++) { 89 unsigned int bit = 1 << j; 90 if (xor & bit) { 91 unsigned int scancode = (i << 3) + j; 92 input_event(input_dev, 93 EV_MSC, MSC_SCAN, scancode); 94 input_report_key(input_dev, 95 keymap[scancode], 96 !(new & bit)); 97 sync_me = 1; 98 } 99 } 100 } 101 102 if (sync_me) 103 input_sync(input_dev); 104 } 105 106 static void jornada_scan_keyb(unsigned char *s) 107 { 108 int i; 109 unsigned short ec_static, dc_static; /* = UINT16_t */ 110 unsigned char matrix_switch[] = { 111 0xfd, 0xff, /* PTD1 PD(1) */ 112 0xdf, 0xff, /* PTD5 PD(5) */ 113 0x7f, 0xff, /* PTD7 PD(7) */ 114 0xff, 0xfe, /* PTE0 PE(0) */ 115 0xff, 0xfd, /* PTE1 PE(1) */ 116 0xff, 0xf7, /* PTE3 PE(3) */ 117 0xff, 0xbf, /* PTE6 PE(6) */ 118 0xff, 0x7f, /* PTE7 PE(7) */ 119 }, *t = matrix_switch; 120 /* PD(x) : 121 1. 0xcc0c & (1~(1 << (2*(x)+1))))) 122 2. (0xf0cf & 0xfffff) */ 123 /* PE(x) : 124 1. 0xcc0c & 0xffff 125 2. 0xf0cf & (1~(1 << (2*(x)+1))))) */ 126 unsigned short matrix_PDE[] = { 127 0xcc04, 0xf0cf, /* PD(1) */ 128 0xc40c, 0xf0cf, /* PD(5) */ 129 0x4c0c, 0xf0cf, /* PD(7) */ 130 0xcc0c, 0xf0cd, /* PE(0) */ 131 0xcc0c, 0xf0c7, /* PE(1) */ 132 0xcc0c, 0xf04f, /* PE(3) */ 133 0xcc0c, 0xd0cf, /* PE(6) */ 134 0xcc0c, 0x70cf, /* PE(7) */ 135 }, *y = matrix_PDE; 136 137 /* Save these control reg bits */ 138 dc_static = (__raw_readw(PDCR) & (~0xcc0c)); 139 ec_static = (__raw_readw(PECR) & (~0xf0cf)); 140 141 for (i = 0; i < 8; i++) { 142 /* disable output for all but the one we want to scan */ 143 __raw_writew((dc_static | *y++), PDCR); 144 __raw_writew((ec_static | *y++), PECR); 145 udelay(5); 146 147 /* Get scanline row */ 148 __raw_writeb(*t++, PDDR); 149 __raw_writeb(*t++, PEDR); 150 udelay(50); 151 152 /* Read data */ 153 *s++ = __raw_readb(PCDR); 154 *s++ = __raw_readb(PFDR); 155 } 156 /* Scan no lines */ 157 __raw_writeb(0xff, PDDR); 158 __raw_writeb(0xff, PEDR); 159 160 /* Enable all scanlines */ 161 __raw_writew((dc_static | (0x5555 & 0xcc0c)),PDCR); 162 __raw_writew((ec_static | (0x5555 & 0xf0cf)),PECR); 163 164 /* Ignore extra keys and events */ 165 *s++ = __raw_readb(PGDR); 166 *s++ = __raw_readb(PHDR); 167 } 168 169 static void jornadakbd680_poll(struct input_dev *input) 170 { 171 struct jornadakbd *jornadakbd = input_get_drvdata(input); 172 173 jornada_scan_keyb(jornadakbd->new_scan); 174 jornada_parse_kbd(jornadakbd); 175 memcpy(jornadakbd->old_scan, jornadakbd->new_scan, JORNADA_SCAN_SIZE); 176 } 177 178 static int jornada680kbd_probe(struct platform_device *pdev) 179 { 180 struct jornadakbd *jornadakbd; 181 struct input_dev *input_dev; 182 int i, error; 183 184 jornadakbd = devm_kzalloc(&pdev->dev, sizeof(struct jornadakbd), 185 GFP_KERNEL); 186 if (!jornadakbd) 187 return -ENOMEM; 188 189 input_dev = devm_input_allocate_device(&pdev->dev); 190 if (!input_dev) { 191 dev_err(&pdev->dev, "failed to allocate input device\n"); 192 return -ENOMEM; 193 } 194 195 jornadakbd->input = input_dev; 196 197 memcpy(jornadakbd->keymap, jornada_scancodes, 198 sizeof(jornadakbd->keymap)); 199 200 input_set_drvdata(input_dev, jornadakbd); 201 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP); 202 input_dev->name = "HP Jornada 680 keyboard"; 203 input_dev->phys = "jornadakbd/input0"; 204 input_dev->keycode = jornadakbd->keymap; 205 input_dev->keycodesize = sizeof(unsigned short); 206 input_dev->keycodemax = ARRAY_SIZE(jornada_scancodes); 207 input_dev->id.bustype = BUS_HOST; 208 209 for (i = 0; i < 128; i++) 210 if (jornadakbd->keymap[i]) 211 __set_bit(jornadakbd->keymap[i], input_dev->keybit); 212 __clear_bit(KEY_RESERVED, input_dev->keybit); 213 214 input_set_capability(input_dev, EV_MSC, MSC_SCAN); 215 216 error = input_setup_polling(input_dev, jornadakbd680_poll); 217 if (error) { 218 dev_err(&pdev->dev, "failed to set up polling\n"); 219 return error; 220 } 221 222 input_set_poll_interval(input_dev, 50 /* msec */); 223 224 error = input_register_device(input_dev); 225 if (error) { 226 dev_err(&pdev->dev, "failed to register input device\n"); 227 return error; 228 } 229 230 return 0; 231 } 232 233 static struct platform_driver jornada680kbd_driver = { 234 .driver = { 235 .name = "jornada680_kbd", 236 }, 237 .probe = jornada680kbd_probe, 238 }; 239 module_platform_driver(jornada680kbd_driver); 240 241 MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>"); 242 MODULE_DESCRIPTION("HP Jornada 620/660/680/690 Keyboard Driver"); 243 MODULE_LICENSE("GPL v2"); 244 MODULE_ALIAS("platform:jornada680_kbd"); 245