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