drivers/input/keyboard/jornada720_kbd.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * drivers/input/keyboard/jornada720_kbd.c
   4  *
   5  * HP Jornada 720 keyboard platform driver
   6  *
   7  * Copyright (C) 2006/2007 Kristoffer Ericson <Kristoffer.Ericson@Gmail.com>
   8  *
   9  *    Copyright (C) 2006 jornada 720 kbd driver by
  10                 Filip Zyzniewsk <Filip.Zyzniewski@tefnet.plX
  11  *     based on (C) 2004 jornada 720 kbd driver by
  12                 Alex Lange <chicken@handhelds.org>
  13  */
  14 #include <linux/device.h>
  15 #include <linux/errno.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/input.h>
  18 #include <linux/kernel.h>
  19 #include <linux/module.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/slab.h>
  22
  23 #include <mach/jornada720.h>
  24
  25 MODULE_AUTHOR("Kristoffer Ericson <Kristoffer.Ericson@gmail.com>");
  26 MODULE_DESCRIPTION("HP Jornada 710/720/728 keyboard driver");
  27 MODULE_LICENSE("GPL v2");
  28
  29 static unsigned short jornada_std_keymap[128] = {                                       /* ROW */
  30         0, KEY_ESC, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7,             /* #1  */
  31         KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_MUTE,       /*  -> */
  32         0, KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6, KEY_7, KEY_8, KEY_9,               /* #2  */
  33         KEY_0, KEY_MINUS, KEY_EQUAL,0, 0, 0,                                            /*  -> */
  34         0, KEY_Q, KEY_W, KEY_E, KEY_R, KEY_T, KEY_Y, KEY_U, KEY_I, KEY_O,               /* #3  */
  35         KEY_P, KEY_BACKSLASH, KEY_BACKSPACE, 0, 0, 0,                                   /*  -> */
  36         0, KEY_A, KEY_S, KEY_D, KEY_F, KEY_G, KEY_H, KEY_J, KEY_K, KEY_L,               /* #4  */
  37         KEY_SEMICOLON, KEY_LEFTBRACE, KEY_RIGHTBRACE, 0, 0, 0,                          /*  -> */
  38         0, KEY_Z, KEY_X, KEY_C, KEY_V, KEY_B, KEY_N, KEY_M, KEY_COMMA,                  /* #5  */
  39         KEY_DOT, KEY_KPMINUS, KEY_APOSTROPHE, KEY_ENTER, 0, 0,0,                        /*  -> */
  40         0, KEY_TAB, 0, KEY_LEFTSHIFT, 0, KEY_APOSTROPHE, 0, 0, 0, 0,                    /* #6  */
  41         KEY_UP, 0, KEY_RIGHTSHIFT, 0, 0, 0,0, 0, 0, 0, 0, KEY_LEFTALT, KEY_GRAVE,       /*  -> */
  42         0, 0, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0, 0,0, KEY_KPASTERISK,              /*  -> */
  43         KEY_LEFTCTRL, 0, KEY_SPACE, 0, 0, 0, KEY_SLASH, KEY_DELETE, 0, 0,               /*  -> */
  44         0, 0, 0, KEY_POWER,                                                             /*  -> */
  45 };
  46
  47 struct jornadakbd {
  48         unsigned short keymap[ARRAY_SIZE(jornada_std_keymap)];
  49         struct input_dev *input;
  50 };
  51
  52 static irqreturn_t jornada720_kbd_interrupt(int irq, void *dev_id)
  53 {
  54         struct platform_device *pdev = dev_id;
  55         struct jornadakbd *jornadakbd = platform_get_drvdata(pdev);
  56         struct input_dev *input = jornadakbd->input;
  57         u8 count, kbd_data, scan_code;
  58
  59         /* startup ssp with spinlock */
  60         jornada_ssp_start();
  61
  62         if (jornada_ssp_inout(GETSCANKEYCODE) != TXDUMMY) {
  63                 dev_dbg(&pdev->dev,
  64                         "GetKeycode command failed with ETIMEDOUT, flushed bus\n");
  65         } else {
  66                 /* How many keycodes are waiting for us? */
  67                 count = jornada_ssp_byte(TXDUMMY);
  68
  69                 /* Lets drag them out one at a time */
  70                 while (count--) {
  71                         /* Exchange TxDummy for location (keymap[kbddata]) */
  72                         kbd_data = jornada_ssp_byte(TXDUMMY);
  73                         scan_code = kbd_data & 0x7f;
  74
  75                         input_event(input, EV_MSC, MSC_SCAN, scan_code);
  76                         input_report_key(input, jornadakbd->keymap[scan_code],
  77                                          !(kbd_data & 0x80));
  78                         input_sync(input);
  79                 }
  80         }
  81
  82         /* release spinlock and turn off ssp */
  83         jornada_ssp_end();
  84
  85         return IRQ_HANDLED;
  86 };
  87
  88 static int jornada720_kbd_probe(struct platform_device *pdev)
  89 {
  90         struct jornadakbd *jornadakbd;
  91         struct input_dev *input_dev;
  92         int i, err, irq;
  93
  94         irq = platform_get_irq(pdev, 0);
  95         if (irq <= 0)
  96                 return irq < 0 ? irq : -EINVAL;
  97
  98         jornadakbd = devm_kzalloc(&pdev->dev, sizeof(*jornadakbd), GFP_KERNEL);
  99         input_dev = devm_input_allocate_device(&pdev->dev);
 100         if (!jornadakbd || !input_dev)
 101                 return -ENOMEM;
 102
 103         platform_set_drvdata(pdev, jornadakbd);
 104
 105         memcpy(jornadakbd->keymap, jornada_std_keymap,
 106                 sizeof(jornada_std_keymap));
 107         jornadakbd->input = input_dev;
 108
 109         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
 110         input_dev->name = "HP Jornada 720 keyboard";
 111         input_dev->phys = "jornadakbd/input0";
 112         input_dev->keycode = jornadakbd->keymap;
 113         input_dev->keycodesize = sizeof(unsigned short);
 114         input_dev->keycodemax = ARRAY_SIZE(jornada_std_keymap);
 115         input_dev->id.bustype = BUS_HOST;
 116         input_dev->dev.parent = &pdev->dev;
 117
 118         for (i = 0; i < ARRAY_SIZE(jornadakbd->keymap); i++)
 119                 __set_bit(jornadakbd->keymap[i], input_dev->keybit);
 120         __clear_bit(KEY_RESERVED, input_dev->keybit);
 121
 122         input_set_capability(input_dev, EV_MSC, MSC_SCAN);
 123
 124         err = devm_request_irq(&pdev->dev, irq, jornada720_kbd_interrupt,
 125                                IRQF_TRIGGER_FALLING, "jornadakbd", pdev);
 126         if (err) {
 127                 dev_err(&pdev->dev, "unable to grab IRQ%d: %d\n", irq, err);
 128                 return err;
 129         }
 130
 131         return input_register_device(jornadakbd->input);
 132 };
 133
 134 /* work with hotplug and coldplug */
 135 MODULE_ALIAS("platform:jornada720_kbd");
 136
 137 static struct platform_driver jornada720_kbd_driver = {
 138         .driver  = {
 139                 .name    = "jornada720_kbd",
 140          },
 141         .probe   = jornada720_kbd_probe,
 142 };
 143 module_platform_driver(jornada720_kbd_driver);