drivers/input/keyboard/jornada680_kbd.c

   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");