input/keyboard/jornada680_kbd.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * drivers/input/keyboard/jornada680_kbd.c
0004  *
0005  * HP Jornada 620/660/680/690 scan keyboard platform driver
0006  *  Copyright (C) 2007  Kristoffer Ericson <Kristoffer.Ericson@gmail.com>
0007  *
0008  * Based on hp680_keyb.c
0009  *  Copyright (C) 2006 Paul Mundt
0010  *  Copyright (C) 2005 Andriy Skulysh
0011  * Split from drivers/input/keyboard/hp600_keyb.c
0012  *  Copyright (C) 2000 Yaegashi Takeshi (hp6xx kbd scan routine and translation table)
0013  *  Copyright (C) 2000 Niibe Yutaka (HP620 Keyb translation table)
0014  */
0015
0016 #include <linux/device.h>
0017 #include <linux/input.h>
0018 #include <linux/interrupt.h>
0019 #include <linux/jiffies.h>
0020 #include <linux/kernel.h>
0021 #include <linux/module.h>
0022 #include <linux/platform_device.h>
0023 #include <linux/slab.h>
0024
0025 #include <asm/delay.h>
0026 #include <asm/io.h>
0027
0028 #define PCCR 0xa4000104
0029 #define PDCR 0xa4000106
0030 #define PECR 0xa4000108
0031 #define PFCR 0xa400010a
0032 #define PCDR 0xa4000124
0033 #define PDDR 0xa4000126
0034 #define PEDR 0xa4000128
0035 #define PFDR 0xa400012a
0036 #define PGDR 0xa400012c
0037 #define PHDR 0xa400012e
0038 #define PJDR 0xa4000130
0039 #define PKDR 0xa4000132
0040 #define PLDR 0xa4000134
0041
0042 static const unsigned short jornada_scancodes[] = {
0043 /* PTD1 */  KEY_CAPSLOCK, KEY_MACRO, KEY_LEFTCTRL, 0, KEY_ESC, KEY_KP5, 0, 0,           /*  1  -> 8   */
0044         KEY_F1, KEY_F2, KEY_F3, KEY_F8, KEY_F7, KEY_F6, KEY_F4, KEY_F5,             /*  9  -> 16  */
0045 /* PTD5 */  KEY_SLASH, KEY_APOSTROPHE, KEY_ENTER, 0, KEY_Z, 0, 0, 0,                /*  17 -> 24  */
0046         KEY_X, KEY_C, KEY_V, KEY_DOT, KEY_COMMA, KEY_M, KEY_B, KEY_N,               /*  25 -> 32  */
0047 /* PTD7 */  KEY_KP2, KEY_KP6, KEY_KP3, 0, 0, 0, 0, 0,                       /*  33 -> 40  */
0048         KEY_F10, KEY_RO, KEY_F9, KEY_KP4, KEY_NUMLOCK, KEY_SCROLLLOCK, KEY_LEFTALT, KEY_HANJA,  /*  41 -> 48  */
0049 /* PTE0 */  KEY_KATAKANA, KEY_KP0, KEY_GRAVE, 0, KEY_FINANCE, 0, 0, 0,              /*  49 -> 56  */
0050         KEY_KPMINUS, KEY_HIRAGANA, KEY_SPACE, KEY_KPDOT, KEY_VOLUMEUP, 249, 0, 0,       /*  57 -> 64  */
0051 /* PTE1 */  KEY_SEMICOLON, KEY_RIGHTBRACE, KEY_BACKSLASH, 0, KEY_A, 0, 0, 0,            /*  65 -> 72  */
0052         KEY_S, KEY_D, KEY_F, KEY_L, KEY_K, KEY_J, KEY_G, KEY_H,                 /*  73 -> 80  */
0053 /* PTE3 */  KEY_KP8, KEY_LEFTMETA, KEY_RIGHTSHIFT, 0, KEY_TAB, 0, 0, 0,             /*  81 -> 88  */
0054         0, KEY_LEFTSHIFT, KEY_KP7, KEY_KP9, KEY_KP1, KEY_F11, KEY_KPPLUS, KEY_KPASTERISK,   /*  89 -> 96  */
0055 /* PTE6 */  KEY_P, KEY_LEFTBRACE, KEY_BACKSPACE, 0, KEY_Q, 0, 0, 0,                 /*  97 -> 104 */
0056         KEY_W, KEY_E, KEY_R, KEY_O, KEY_I, KEY_U, KEY_T, KEY_Y,                 /* 105 -> 112 */
0057 /* PTE7 */  KEY_0, KEY_MINUS, KEY_EQUAL, 0, KEY_1, 0, 0, 0,                     /* 113 -> 120 */
0058         KEY_2, KEY_3, KEY_4, KEY_9, KEY_8, KEY_7, KEY_5, KEY_6,                 /* 121 -> 128 */
0059 /* **** */  0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0060         0, 0, 0, 0, 0
0061 };
0062
0063 #define JORNADA_SCAN_SIZE   18
0064
0065 struct jornadakbd {
0066     struct input_dev *input;
0067     unsigned short keymap[ARRAY_SIZE(jornada_scancodes)];
0068     unsigned char length;
0069     unsigned char old_scan[JORNADA_SCAN_SIZE];
0070     unsigned char new_scan[JORNADA_SCAN_SIZE];
0071 };
0072
0073 static void jornada_parse_kbd(struct jornadakbd *jornadakbd)
0074 {
0075     struct input_dev *input_dev = jornadakbd->input;
0076     unsigned short *keymap = jornadakbd->keymap;
0077     unsigned int sync_me = 0;
0078     unsigned int i, j;
0079
0080     for (i = 0; i < JORNADA_SCAN_SIZE; i++) {
0081         unsigned char new = jornadakbd->new_scan[i];
0082         unsigned char old = jornadakbd->old_scan[i];
0083         unsigned int xor = new ^ old;
0084
0085         if (xor == 0)
0086             continue;
0087
0088         for (j = 0; j < 8; j++) {
0089             unsigned int bit = 1 << j;
0090             if (xor & bit) {
0091                 unsigned int scancode = (i << 3) + j;
0092                 input_event(input_dev,
0093                         EV_MSC, MSC_SCAN, scancode);
0094                 input_report_key(input_dev,
0095                          keymap[scancode],
0096                          !(new & bit));
0097                 sync_me = 1;
0098             }
0099         }
0100     }
0101
0102     if (sync_me)
0103         input_sync(input_dev);
0104 }
0105
0106 static void jornada_scan_keyb(unsigned char *s)
0107 {
0108     int i;
0109     unsigned short ec_static, dc_static; /* = UINT16_t */
0110     unsigned char matrix_switch[] = {
0111         0xfd, 0xff,   /* PTD1 PD(1) */
0112         0xdf, 0xff,   /* PTD5 PD(5) */
0113         0x7f, 0xff,   /* PTD7 PD(7) */
0114         0xff, 0xfe,   /* PTE0 PE(0) */
0115         0xff, 0xfd,   /* PTE1 PE(1) */
0116         0xff, 0xf7,   /* PTE3 PE(3) */
0117         0xff, 0xbf,   /* PTE6 PE(6) */
0118         0xff, 0x7f,   /* PTE7 PE(7) */
0119     }, *t = matrix_switch;
0120     /* PD(x) :
0121     1.   0xcc0c & (1~(1 << (2*(x)+1)))))
0122     2.   (0xf0cf & 0xfffff) */
0123     /* PE(x) :
0124     1.   0xcc0c & 0xffff
0125     2.   0xf0cf & (1~(1 << (2*(x)+1))))) */
0126     unsigned short matrix_PDE[] = {
0127         0xcc04, 0xf0cf,  /* PD(1) */
0128         0xc40c, 0xf0cf,  /* PD(5) */
0129         0x4c0c, 0xf0cf,  /* PD(7) */
0130         0xcc0c, 0xf0cd,  /* PE(0) */
0131         0xcc0c, 0xf0c7,  /* PE(1) */
0132         0xcc0c, 0xf04f,  /* PE(3) */
0133         0xcc0c, 0xd0cf,  /* PE(6) */
0134         0xcc0c, 0x70cf,  /* PE(7) */
0135     }, *y = matrix_PDE;
0136
0137     /* Save these control reg bits */
0138     dc_static = (__raw_readw(PDCR) & (~0xcc0c));
0139     ec_static = (__raw_readw(PECR) & (~0xf0cf));
0140
0141     for (i = 0; i < 8; i++) {
0142         /* disable output for all but the one we want to scan */
0143         __raw_writew((dc_static | *y++), PDCR);
0144         __raw_writew((ec_static | *y++), PECR);
0145         udelay(5);
0146
0147         /* Get scanline row */
0148         __raw_writeb(*t++, PDDR);
0149         __raw_writeb(*t++, PEDR);
0150         udelay(50);
0151
0152         /* Read data */
0153         *s++ = __raw_readb(PCDR);
0154         *s++ = __raw_readb(PFDR);
0155     }
0156     /* Scan no lines */
0157     __raw_writeb(0xff, PDDR);
0158     __raw_writeb(0xff, PEDR);
0159
0160     /* Enable all scanlines */
0161     __raw_writew((dc_static | (0x5555 & 0xcc0c)),PDCR);
0162     __raw_writew((ec_static | (0x5555 & 0xf0cf)),PECR);
0163
0164     /* Ignore extra keys and events */
0165     *s++ = __raw_readb(PGDR);
0166     *s++ = __raw_readb(PHDR);
0167 }
0168
0169 static void jornadakbd680_poll(struct input_dev *input)
0170 {
0171     struct jornadakbd *jornadakbd = input_get_drvdata(input);
0172
0173     jornada_scan_keyb(jornadakbd->new_scan);
0174     jornada_parse_kbd(jornadakbd);
0175     memcpy(jornadakbd->old_scan, jornadakbd->new_scan, JORNADA_SCAN_SIZE);
0176 }
0177
0178 static int jornada680kbd_probe(struct platform_device *pdev)
0179 {
0180     struct jornadakbd *jornadakbd;
0181     struct input_dev *input_dev;
0182     int i, error;
0183
0184     jornadakbd = devm_kzalloc(&pdev->dev, sizeof(struct jornadakbd),
0185                   GFP_KERNEL);
0186     if (!jornadakbd)
0187         return -ENOMEM;
0188
0189     input_dev = devm_input_allocate_device(&pdev->dev);
0190     if (!input_dev) {
0191         dev_err(&pdev->dev, "failed to allocate input device\n");
0192         return -ENOMEM;
0193     }
0194
0195     jornadakbd->input = input_dev;
0196
0197     memcpy(jornadakbd->keymap, jornada_scancodes,
0198         sizeof(jornadakbd->keymap));
0199
0200     input_set_drvdata(input_dev, jornadakbd);
0201     input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
0202     input_dev->name = "HP Jornada 680 keyboard";
0203     input_dev->phys = "jornadakbd/input0";
0204     input_dev->keycode = jornadakbd->keymap;
0205     input_dev->keycodesize = sizeof(unsigned short);
0206     input_dev->keycodemax = ARRAY_SIZE(jornada_scancodes);
0207     input_dev->id.bustype = BUS_HOST;
0208
0209     for (i = 0; i < 128; i++)
0210         if (jornadakbd->keymap[i])
0211             __set_bit(jornadakbd->keymap[i], input_dev->keybit);
0212     __clear_bit(KEY_RESERVED, input_dev->keybit);
0213
0214     input_set_capability(input_dev, EV_MSC, MSC_SCAN);
0215
0216     error = input_setup_polling(input_dev, jornadakbd680_poll);
0217     if (error) {
0218         dev_err(&pdev->dev, "failed to set up polling\n");
0219         return error;
0220     }
0221
0222     input_set_poll_interval(input_dev, 50 /* msec */);
0223
0224     error = input_register_device(input_dev);
0225     if (error) {
0226         dev_err(&pdev->dev, "failed to register input device\n");
0227         return error;
0228     }
0229
0230     return 0;
0231 }
0232
0233 static struct platform_driver jornada680kbd_driver = {
0234     .driver = {
0235         .name   = "jornada680_kbd",
0236     },
0237     .probe  = jornada680kbd_probe,
0238 };
0239 module_platform_driver(jornada680kbd_driver);
0240
0241 MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
0242 MODULE_DESCRIPTION("HP Jornada 620/660/680/690 Keyboard Driver");
0243 MODULE_LICENSE("GPL v2");
0244 MODULE_ALIAS("platform:jornada680_kbd");