drivers/input/keyboard/jornada680_kbd.c

   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/input.h>
  20 #include <linux/input-polldev.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/jiffies.h>
  23 #include <linux/kernel.h>
  24 #include <linux/module.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/slab.h>
  27
  28 #include <asm/delay.h>
  29 #include <asm/io.h>
  30
  31 #define PCCR 0xa4000104
  32 #define PDCR 0xa4000106
  33 #define PECR 0xa4000108
  34 #define PFCR 0xa400010a
  35 #define PCDR 0xa4000124
  36 #define PDDR 0xa4000126
  37 #define PEDR 0xa4000128
  38 #define PFDR 0xa400012a
  39 #define PGDR 0xa400012c
  40 #define PHDR 0xa400012e
  41 #define PJDR 0xa4000130
  42 #define PKDR 0xa4000132
  43 #define PLDR 0xa4000134
  44
  45 static const unsigned short jornada_scancodes[] = {
  46 /* PTD1 */      KEY_CAPSLOCK, KEY_MACRO, KEY_LEFTCTRL, 0, KEY_ESC, KEY_KP5, 0, 0,                       /*  1  -> 8   */
  47                 KEY_F1, KEY_F2, KEY_F3, KEY_F8, KEY_F7, KEY_F6, KEY_F4, KEY_F5,                         /*  9  -> 16  */
  48 /* PTD5 */      KEY_SLASH, KEY_APOSTROPHE, KEY_ENTER, 0, KEY_Z, 0, 0, 0,                                /*  17 -> 24  */
  49                 KEY_X, KEY_C, KEY_V, KEY_DOT, KEY_COMMA, KEY_M, KEY_B, KEY_N,                           /*  25 -> 32  */
  50 /* PTD7 */      KEY_KP2, KEY_KP6, KEY_KP3, 0, 0, 0, 0, 0,                                               /*  33 -> 40  */
  51                 KEY_F10, KEY_RO, KEY_F9, KEY_KP4, KEY_NUMLOCK, KEY_SCROLLLOCK, KEY_LEFTALT, KEY_HANJA,  /*  41 -> 48  */
  52 /* PTE0 */      KEY_KATAKANA, KEY_KP0, KEY_GRAVE, 0, KEY_FINANCE, 0, 0, 0,                              /*  49 -> 56  */
  53                 KEY_KPMINUS, KEY_HIRAGANA, KEY_SPACE, KEY_KPDOT, KEY_VOLUMEUP, 249, 0, 0,               /*  57 -> 64  */
  54 /* PTE1 */      KEY_SEMICOLON, KEY_RIGHTBRACE, KEY_BACKSLASH, 0, KEY_A, 0, 0, 0,                        /*  65 -> 72  */
  55                 KEY_S, KEY_D, KEY_F, KEY_L, KEY_K, KEY_J, KEY_G, KEY_H,                                 /*  73 -> 80  */
  56 /* PTE3 */      KEY_KP8, KEY_LEFTMETA, KEY_RIGHTSHIFT, 0, KEY_TAB, 0, 0, 0,                             /*  81 -> 88  */
  57                 0, KEY_LEFTSHIFT, KEY_KP7, KEY_KP9, KEY_KP1, KEY_F11, KEY_KPPLUS, KEY_KPASTERISK,       /*  89 -> 96  */
  58 /* PTE6 */      KEY_P, KEY_LEFTBRACE, KEY_BACKSPACE, 0, KEY_Q, 0, 0, 0,                                 /*  97 -> 104 */
  59                 KEY_W, KEY_E, KEY_R, KEY_O, KEY_I, KEY_U, KEY_T, KEY_Y,                                 /* 105 -> 112 */
  60 /* PTE7 */      KEY_0, KEY_MINUS, KEY_EQUAL, 0, KEY_1, 0, 0, 0,                                         /* 113 -> 120 */
  61                 KEY_2, KEY_3, KEY_4, KEY_9, KEY_8, KEY_7, KEY_5, KEY_6,                                 /* 121 -> 128 */
  62 /* **** */      0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  63                 0, 0, 0, 0, 0
  64 };
  65
  66 #define JORNADA_SCAN_SIZE       18
  67
  68 struct jornadakbd {
  69         struct input_polled_dev *poll_dev;
  70         unsigned short keymap[ARRAY_SIZE(jornada_scancodes)];
  71         unsigned char length;
  72         unsigned char old_scan[JORNADA_SCAN_SIZE];
  73         unsigned char new_scan[JORNADA_SCAN_SIZE];
  74 };
  75
  76 static void jornada_parse_kbd(struct jornadakbd *jornadakbd)
  77 {
  78         struct input_dev *input_dev = jornadakbd->poll_dev->input;
  79         unsigned short *keymap = jornadakbd->keymap;
  80         unsigned int sync_me = 0;
  81         unsigned int i, j;
  82
  83         for (i = 0; i < JORNADA_SCAN_SIZE; i++) {
  84                 unsigned char new = jornadakbd->new_scan[i];
  85                 unsigned char old = jornadakbd->old_scan[i];
  86                 unsigned int xor = new ^ old;
  87
  88                 if (xor == 0)
  89                         continue;
  90
  91                 for (j = 0; j < 8; j++) {
  92                         unsigned int bit = 1 << j;
  93                         if (xor & bit) {
  94                                 unsigned int scancode = (i << 3) + j;
  95                                 input_event(input_dev,
  96                                             EV_MSC, MSC_SCAN, scancode);
  97                                 input_report_key(input_dev,
  98                                                  keymap[scancode],
  99                                                  !(new & bit));
 100                                 sync_me = 1;
 101                         }
 102                 }
 103         }
 104
 105         if (sync_me)
 106             input_sync(input_dev);
 107 }
 108
 109 static void jornada_scan_keyb(unsigned char *s)
 110 {
 111         int i;
 112         unsigned short ec_static, dc_static; /* = UINT16_t */
 113         unsigned char matrix_switch[] = {
 114                 0xfd, 0xff,   /* PTD1 PD(1) */
 115                 0xdf, 0xff,   /* PTD5 PD(5) */
 116                 0x7f, 0xff,   /* PTD7 PD(7) */
 117                 0xff, 0xfe,   /* PTE0 PE(0) */
 118                 0xff, 0xfd,   /* PTE1 PE(1) */
 119                 0xff, 0xf7,   /* PTE3 PE(3) */
 120                 0xff, 0xbf,   /* PTE6 PE(6) */
 121                 0xff, 0x7f,   /* PTE7 PE(7) */
 122         }, *t = matrix_switch;
 123         /* PD(x) :
 124         1.   0xcc0c & (1~(1 << (2*(x)+1)))))
 125         2.   (0xf0cf & 0xfffff) */
 126         /* PE(x) :
 127         1.   0xcc0c & 0xffff
 128         2.   0xf0cf & (1~(1 << (2*(x)+1))))) */
 129         unsigned short matrix_PDE[] = {
 130                 0xcc04, 0xf0cf,  /* PD(1) */
 131                 0xc40c, 0xf0cf,  /* PD(5) */
 132                 0x4c0c, 0xf0cf,  /* PD(7) */
 133                 0xcc0c, 0xf0cd,  /* PE(0) */
 134                 0xcc0c, 0xf0c7,  /* PE(1) */
 135                 0xcc0c, 0xf04f,  /* PE(3) */
 136                 0xcc0c, 0xd0cf,  /* PE(6) */
 137                 0xcc0c, 0x70cf,  /* PE(7) */
 138         }, *y = matrix_PDE;
 139
 140         /* Save these control reg bits */
 141         dc_static = (__raw_readw(PDCR) & (~0xcc0c));
 142         ec_static = (__raw_readw(PECR) & (~0xf0cf));
 143
 144         for (i = 0; i < 8; i++) {
 145                 /* disable output for all but the one we want to scan */
 146                 __raw_writew((dc_static | *y++), PDCR);
 147                 __raw_writew((ec_static | *y++), PECR);
 148                 udelay(5);
 149
 150                 /* Get scanline row */
 151                 __raw_writeb(*t++, PDDR);
 152                 __raw_writeb(*t++, PEDR);
 153                 udelay(50);
 154
 155                 /* Read data */
 156                 *s++ = __raw_readb(PCDR);
 157                 *s++ = __raw_readb(PFDR);
 158         }
 159         /* Scan no lines */
 160         __raw_writeb(0xff, PDDR);
 161         __raw_writeb(0xff, PEDR);
 162
 163         /* Enable all scanlines */
 164         __raw_writew((dc_static | (0x5555 & 0xcc0c)),PDCR);
 165         __raw_writew((ec_static | (0x5555 & 0xf0cf)),PECR);
 166
 167         /* Ignore extra keys and events */
 168         *s++ = __raw_readb(PGDR);
 169         *s++ = __raw_readb(PHDR);
 170 }
 171
 172 static void jornadakbd680_poll(struct input_polled_dev *dev)
 173 {
 174         struct jornadakbd *jornadakbd = dev->private;
 175
 176         jornada_scan_keyb(jornadakbd->new_scan);
 177         jornada_parse_kbd(jornadakbd);
 178         memcpy(jornadakbd->old_scan, jornadakbd->new_scan, JORNADA_SCAN_SIZE);
 179 }
 180
 181 static int jornada680kbd_probe(struct platform_device *pdev)
 182 {
 183         struct jornadakbd *jornadakbd;
 184         struct input_polled_dev *poll_dev;
 185         struct input_dev *input_dev;
 186         int i, error;
 187
 188         jornadakbd = kzalloc(sizeof(struct jornadakbd), GFP_KERNEL);
 189         if (!jornadakbd)
 190                 return -ENOMEM;
 191
 192         poll_dev = input_allocate_polled_device();
 193         if (!poll_dev) {
 194                 error = -ENOMEM;
 195                 goto failed;
 196         }
 197
 198         platform_set_drvdata(pdev, jornadakbd);
 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                 goto failed;
 229
 230         return 0;
 231
 232  failed:
 233         printk(KERN_ERR "Jornadakbd: failed to register driver, error: %d\n",
 234                 error);
 235         input_free_polled_device(poll_dev);
 236         kfree(jornadakbd);
 237         return error;
 238
 239 }
 240
 241 static int jornada680kbd_remove(struct platform_device *pdev)
 242 {
 243         struct jornadakbd *jornadakbd = platform_get_drvdata(pdev);
 244
 245         input_unregister_polled_device(jornadakbd->poll_dev);
 246         input_free_polled_device(jornadakbd->poll_dev);
 247         kfree(jornadakbd);
 248
 249         return 0;
 250 }
 251
 252 static struct platform_driver jornada680kbd_driver = {
 253         .driver = {
 254                 .name   = "jornada680_kbd",
 255                 .owner  = THIS_MODULE,
 256         },
 257         .probe  = jornada680kbd_probe,
 258         .remove = jornada680kbd_remove,
 259 };
 260 module_platform_driver(jornada680kbd_driver);
 261
 262 MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
 263 MODULE_DESCRIPTION("HP Jornada 620/660/680/690 Keyboard Driver");
 264 MODULE_LICENSE("GPL v2");
 265 MODULE_ALIAS("platform:jornada680_kbd");