linux/drivers/input/keyboard/jornada680_kbd.c
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   1/*
   2 * drivers/input/keyboard/jornada680_kbd.c
   3 *
   4 * HP Jornada 620/660/680/690 scan keyboard platform driver
   5 *  Copyright (C) 2007  Kristoffer Ericson <Kristoffer.Ericson@gmail.com>
   6 *
   7 * Based on hp680_keyb.c
   8 *  Copyright (C) 2006 Paul Mundt
   9 *  Copyright (C) 2005 Andriy Skulysh
  10 * Split from drivers/input/keyboard/hp600_keyb.c
  11 *  Copyright (C) 2000 Yaegashi Takeshi (hp6xx kbd scan routine and translation table)
  12 *  Copyright (C) 2000 Niibe Yutaka (HP620 Keyb translation table)
  13 *
  14 * This program is free software; you can redistribute it and/or modify it
  15 * under the terms of the GNU General Public License version 2 as
  16 * published by the Free Software Foundation.
  17 */
  18
  19#include <linux/device.h>
  20#include <linux/input.h>
  21#include <linux/input-polldev.h>
  22#include <linux/interrupt.h>
  23#include <linux/jiffies.h>
  24#include <linux/kernel.h>
  25#include <linux/module.h>
  26#include <linux/platform_device.h>
  27#include <linux/slab.h>
  28
  29#include <asm/delay.h>
  30#include <asm/io.h>
  31
  32#define PCCR 0xa4000104
  33#define PDCR 0xa4000106
  34#define PECR 0xa4000108
  35#define PFCR 0xa400010a
  36#define PCDR 0xa4000124
  37#define PDDR 0xa4000126
  38#define PEDR 0xa4000128
  39#define PFDR 0xa400012a
  40#define PGDR 0xa400012c
  41#define PHDR 0xa400012e
  42#define PJDR 0xa4000130
  43#define PKDR 0xa4000132
  44#define PLDR 0xa4000134
  45
  46static const unsigned short jornada_scancodes[] = {
  47/* PTD1 */      KEY_CAPSLOCK, KEY_MACRO, KEY_LEFTCTRL, 0, KEY_ESC, KEY_KP5, 0, 0,                       /*  1  -> 8   */
  48                KEY_F1, KEY_F2, KEY_F3, KEY_F8, KEY_F7, KEY_F6, KEY_F4, KEY_F5,                         /*  9  -> 16  */
  49/* PTD5 */      KEY_SLASH, KEY_APOSTROPHE, KEY_ENTER, 0, KEY_Z, 0, 0, 0,                                /*  17 -> 24  */
  50                KEY_X, KEY_C, KEY_V, KEY_DOT, KEY_COMMA, KEY_M, KEY_B, KEY_N,                           /*  25 -> 32  */
  51/* PTD7 */      KEY_KP2, KEY_KP6, KEY_KP3, 0, 0, 0, 0, 0,                                               /*  33 -> 40  */
  52                KEY_F10, KEY_RO, KEY_F9, KEY_KP4, KEY_NUMLOCK, KEY_SCROLLLOCK, KEY_LEFTALT, KEY_HANJA,  /*  41 -> 48  */
  53/* PTE0 */      KEY_KATAKANA, KEY_KP0, KEY_GRAVE, 0, KEY_FINANCE, 0, 0, 0,                              /*  49 -> 56  */
  54                KEY_KPMINUS, KEY_HIRAGANA, KEY_SPACE, KEY_KPDOT, KEY_VOLUMEUP, 249, 0, 0,               /*  57 -> 64  */
  55/* PTE1 */      KEY_SEMICOLON, KEY_RIGHTBRACE, KEY_BACKSLASH, 0, KEY_A, 0, 0, 0,                        /*  65 -> 72  */
  56                KEY_S, KEY_D, KEY_F, KEY_L, KEY_K, KEY_J, KEY_G, KEY_H,                                 /*  73 -> 80  */
  57/* PTE3 */      KEY_KP8, KEY_LEFTMETA, KEY_RIGHTSHIFT, 0, KEY_TAB, 0, 0, 0,                             /*  81 -> 88  */
  58                0, KEY_LEFTSHIFT, KEY_KP7, KEY_KP9, KEY_KP1, KEY_F11, KEY_KPPLUS, KEY_KPASTERISK,       /*  89 -> 96  */
  59/* PTE6 */      KEY_P, KEY_LEFTBRACE, KEY_BACKSPACE, 0, KEY_Q, 0, 0, 0,                                 /*  97 -> 104 */
  60                KEY_W, KEY_E, KEY_R, KEY_O, KEY_I, KEY_U, KEY_T, KEY_Y,                                 /* 105 -> 112 */
  61/* PTE7 */      KEY_0, KEY_MINUS, KEY_EQUAL, 0, KEY_1, 0, 0, 0,                                         /* 113 -> 120 */
  62                KEY_2, KEY_3, KEY_4, KEY_9, KEY_8, KEY_7, KEY_5, KEY_6,                                 /* 121 -> 128 */
  63/* **** */      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  64                0, 0, 0, 0, 0
  65};
  66
  67#define JORNADA_SCAN_SIZE       18
  68
  69struct jornadakbd {
  70        struct input_polled_dev *poll_dev;
  71        unsigned short keymap[ARRAY_SIZE(jornada_scancodes)];
  72        unsigned char length;
  73        unsigned char old_scan[JORNADA_SCAN_SIZE];
  74        unsigned char new_scan[JORNADA_SCAN_SIZE];
  75};
  76
  77static void jornada_parse_kbd(struct jornadakbd *jornadakbd)
  78{
  79        struct input_dev *input_dev = jornadakbd->poll_dev->input;
  80        unsigned short *keymap = jornadakbd->keymap;
  81        unsigned int sync_me = 0;
  82        unsigned int i, j;
  83
  84        for (i = 0; i < JORNADA_SCAN_SIZE; i++) {
  85                unsigned char new = jornadakbd->new_scan[i];
  86                unsigned char old = jornadakbd->old_scan[i];
  87                unsigned int xor = new ^ old;
  88
  89                if (xor == 0)
  90                        continue;
  91
  92                for (j = 0; j < 8; j++) {
  93                        unsigned int bit = 1 << j;
  94                        if (xor & bit) {
  95                                unsigned int scancode = (i << 3) + j;
  96                                input_event(input_dev,
  97                                            EV_MSC, MSC_SCAN, scancode);
  98                                input_report_key(input_dev,
  99                                                 keymap[scancode],
 100                                                 !(new & bit));
 101                                sync_me = 1;
 102                        }
 103                }
 104        }
 105
 106        if (sync_me)
 107            input_sync(input_dev);
 108}
 109
 110static void jornada_scan_keyb(unsigned char *s)
 111{
 112        int i;
 113        unsigned short ec_static, dc_static; /* = UINT16_t */
 114        unsigned char matrix_switch[] = {
 115                0xfd, 0xff,   /* PTD1 PD(1) */
 116                0xdf, 0xff,   /* PTD5 PD(5) */
 117                0x7f, 0xff,   /* PTD7 PD(7) */
 118                0xff, 0xfe,   /* PTE0 PE(0) */
 119                0xff, 0xfd,   /* PTE1 PE(1) */
 120                0xff, 0xf7,   /* PTE3 PE(3) */
 121                0xff, 0xbf,   /* PTE6 PE(6) */
 122                0xff, 0x7f,   /* PTE7 PE(7) */
 123        }, *t = matrix_switch;
 124        /* PD(x) :
 125        1.   0xcc0c & (1~(1 << (2*(x)+1)))))
 126        2.   (0xf0cf & 0xfffff) */
 127        /* PE(x) :
 128        1.   0xcc0c & 0xffff
 129        2.   0xf0cf & (1~(1 << (2*(x)+1))))) */
 130        unsigned short matrix_PDE[] = {
 131                0xcc04, 0xf0cf,  /* PD(1) */
 132                0xc40c, 0xf0cf,  /* PD(5) */
 133                0x4c0c, 0xf0cf,  /* PD(7) */
 134                0xcc0c, 0xf0cd,  /* PE(0) */
 135                0xcc0c, 0xf0c7,  /* PE(1) */
 136                0xcc0c, 0xf04f,  /* PE(3) */
 137                0xcc0c, 0xd0cf,  /* PE(6) */
 138                0xcc0c, 0x70cf,  /* PE(7) */
 139        }, *y = matrix_PDE;
 140
 141        /* Save these control reg bits */
 142        dc_static = (__raw_readw(PDCR) & (~0xcc0c));
 143        ec_static = (__raw_readw(PECR) & (~0xf0cf));
 144
 145        for (i = 0; i < 8; i++) {
 146                /* disable output for all but the one we want to scan */
 147                __raw_writew((dc_static | *y++), PDCR);
 148                __raw_writew((ec_static | *y++), PECR);
 149                udelay(5);
 150
 151                /* Get scanline row */
 152                __raw_writeb(*t++, PDDR);
 153                __raw_writeb(*t++, PEDR);
 154                udelay(50);
 155
 156                /* Read data */
 157                *s++ = __raw_readb(PCDR);
 158                *s++ = __raw_readb(PFDR);
 159        }
 160        /* Scan no lines */
 161        __raw_writeb(0xff, PDDR);
 162        __raw_writeb(0xff, PEDR);
 163
 164        /* Enable all scanlines */
 165        __raw_writew((dc_static | (0x5555 & 0xcc0c)),PDCR);
 166        __raw_writew((ec_static | (0x5555 & 0xf0cf)),PECR);
 167
 168        /* Ignore extra keys and events */
 169        *s++ = __raw_readb(PGDR);
 170        *s++ = __raw_readb(PHDR);
 171}
 172
 173static void jornadakbd680_poll(struct input_polled_dev *dev)
 174{
 175        struct jornadakbd *jornadakbd = dev->private;
 176
 177        jornada_scan_keyb(jornadakbd->new_scan);
 178        jornada_parse_kbd(jornadakbd);
 179        memcpy(jornadakbd->old_scan, jornadakbd->new_scan, JORNADA_SCAN_SIZE);
 180}
 181
 182static int jornada680kbd_probe(struct platform_device *pdev)
 183{
 184        struct jornadakbd *jornadakbd;
 185        struct input_polled_dev *poll_dev;
 186        struct input_dev *input_dev;
 187        int i, error;
 188
 189        jornadakbd = devm_kzalloc(&pdev->dev, sizeof(struct jornadakbd),
 190                                  GFP_KERNEL);
 191        if (!jornadakbd)
 192                return -ENOMEM;
 193
 194        poll_dev = devm_input_allocate_polled_device(&pdev->dev);
 195        if (!poll_dev) {
 196                dev_err(&pdev->dev, "failed to allocate polled input device\n");
 197                return -ENOMEM;
 198        }
 199
 200        jornadakbd->poll_dev = poll_dev;
 201
 202        memcpy(jornadakbd->keymap, jornada_scancodes,
 203                sizeof(jornadakbd->keymap));
 204
 205        poll_dev->private = jornadakbd;
 206        poll_dev->poll = jornadakbd680_poll;
 207        poll_dev->poll_interval = 50; /* msec */
 208
 209        input_dev = poll_dev->input;
 210        input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
 211        input_dev->name = "HP Jornada 680 keyboard";
 212        input_dev->phys = "jornadakbd/input0";
 213        input_dev->keycode = jornadakbd->keymap;
 214        input_dev->keycodesize = sizeof(unsigned short);
 215        input_dev->keycodemax = ARRAY_SIZE(jornada_scancodes);
 216        input_dev->dev.parent = &pdev->dev;
 217        input_dev->id.bustype = BUS_HOST;
 218
 219        for (i = 0; i < 128; i++)
 220                if (jornadakbd->keymap[i])
 221                        __set_bit(jornadakbd->keymap[i], input_dev->keybit);
 222        __clear_bit(KEY_RESERVED, input_dev->keybit);
 223
 224        input_set_capability(input_dev, EV_MSC, MSC_SCAN);
 225
 226        error = input_register_polled_device(jornadakbd->poll_dev);
 227        if (error) {
 228                dev_err(&pdev->dev, "failed to register polled input device\n");
 229                return error;
 230        }
 231
 232        return 0;
 233}
 234
 235static struct platform_driver jornada680kbd_driver = {
 236        .driver = {
 237                .name   = "jornada680_kbd",
 238        },
 239        .probe  = jornada680kbd_probe,
 240};
 241module_platform_driver(jornada680kbd_driver);
 242
 243MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
 244MODULE_DESCRIPTION("HP Jornada 620/660/680/690 Keyboard Driver");
 245MODULE_LICENSE("GPL v2");
 246MODULE_ALIAS("platform:jornada680_kbd");
 247
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