drivers/input/keyboard/jornada720_kbd.c

   1 /*
   2  * drivers/input/keyboard/jornada720_kbd.c
   3  *
   4  * HP Jornada 720 keyboard platform driver
   5  *
   6  * Copyright (C) 2006/2007 Kristoffer Ericson <Kristoffer.Ericson@Gmail.com>
   7  *
   8  *    Copyright (C) 2006 jornada 720 kbd driver by
   9                 Filip Zyzniewsk <Filip.Zyzniewski@tefnet.plX
  10  *     based on (C) 2004 jornada 720 kbd driver by
  11                 Alex Lange <chicken@handhelds.org>
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License version 2 as
  15  * published by the Free Software Foundation.
  16  *
  17  */
  18 #include <linux/device.h>
  19 #include <linux/errno.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/init.h>
  22 #include <linux/input.h>
  23 #include <linux/kernel.h>
  24 #include <linux/module.h>
  25 #include <linux/platform_device.h>
  26
  27 #include <asm/arch/jornada720.h>
  28 #include <asm/hardware.h>
  29
  30 MODULE_AUTHOR("Kristoffer Ericson <Kristoffer.Ericson@gmail.com>");
  31 MODULE_DESCRIPTION("HP Jornada 710/720/728 keyboard driver");
  32 MODULE_LICENSE("GPLv2");
  33
  34 static unsigned short jornada_std_keymap[128] = {                                       /* ROW */
  35         0, KEY_ESC, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7,             /* #1  */
  36         KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_MUTE,       /*  -> */
  37         0, KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6, KEY_7, KEY_8, KEY_9,               /* #2  */
  38         KEY_0, KEY_MINUS, KEY_EQUAL,0, 0, 0,                                            /*  -> */
  39         0, KEY_Q, KEY_W, KEY_E, KEY_R, KEY_T, KEY_Y, KEY_U, KEY_I, KEY_O,               /* #3  */
  40         KEY_P, KEY_BACKSLASH, KEY_BACKSPACE, 0, 0, 0,                                   /*  -> */
  41         0, KEY_A, KEY_S, KEY_D, KEY_F, KEY_G, KEY_H, KEY_J, KEY_K, KEY_L,               /* #4  */
  42         KEY_SEMICOLON, KEY_LEFTBRACE, KEY_RIGHTBRACE, 0, 0, 0,                          /*  -> */
  43         0, KEY_Z, KEY_X, KEY_C, KEY_V, KEY_B, KEY_N, KEY_M, KEY_COMMA,                  /* #5  */
  44         KEY_DOT, KEY_KPMINUS, KEY_APOSTROPHE, KEY_ENTER, 0, 0,0,                        /*  -> */
  45         0, KEY_TAB, 0, KEY_LEFTSHIFT, 0, KEY_APOSTROPHE, 0, 0, 0, 0,                    /* #6  */
  46         KEY_UP, 0, KEY_RIGHTSHIFT, 0, 0, 0,0, 0, 0, 0, 0, KEY_LEFTALT, KEY_GRAVE,       /*  -> */
  47         0, 0, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0, 0,0, KEY_KPASTERISK,              /*  -> */
  48         KEY_LEFTCTRL, 0, KEY_SPACE, 0, 0, 0, KEY_SLASH, KEY_DELETE, 0, 0,               /*  -> */
  49         0, 0, 0, KEY_POWER,                                                             /*  -> */
  50 };
  51
  52 struct jornadakbd {
  53         unsigned short keymap[ARRAY_SIZE(jornada_std_keymap)];
  54         struct input_dev *input;
  55 };
  56
  57 static irqreturn_t jornada720_kbd_interrupt(int irq, void *dev_id)
  58 {
  59         struct platform_device *pdev = dev_id;
  60         struct jornadakbd *jornadakbd = platform_get_drvdata(pdev);
  61         struct input_dev *input = jornadakbd->input;
  62         u8 count, kbd_data, scan_code;
  63
  64         /* startup ssp with spinlock */
  65         jornada_ssp_start();
  66
  67         if (jornada_ssp_inout(GETSCANKEYCODE) != TXDUMMY) {
  68                 printk(KERN_DEBUG
  69                         "jornada720_kbd: "
  70                         "GetKeycode command failed with ETIMEDOUT, "
  71                         "flushed bus\n");
  72         } else {
  73                 /* How many keycodes are waiting for us? */
  74                 count = jornada_ssp_byte(TXDUMMY);
  75
  76                 /* Lets drag them out one at a time */
  77                 while (count--) {
  78                         /* Exchange TxDummy for location (keymap[kbddata]) */
  79                         kbd_data = jornada_ssp_byte(TXDUMMY);
  80                         scan_code = kbd_data & 0x7f;
  81
  82                         input_event(input, EV_MSC, MSC_SCAN, scan_code);
  83                         input_report_key(input, jornadakbd->keymap[scan_code],
  84                                          !(kbd_data & 0x80));
  85                         input_sync(input);
  86                 }
  87         }
  88
  89         /* release spinlock and turn off ssp */
  90         jornada_ssp_end();
  91
  92         return IRQ_HANDLED;
  93 };
  94
  95 static int __devinit jornada720_kbd_probe(struct platform_device *pdev)
  96 {
  97         struct jornadakbd *jornadakbd;
  98         struct input_dev *input_dev;
  99         int i, err;
 100
 101         jornadakbd = kzalloc(sizeof(struct jornadakbd), GFP_KERNEL);
 102         input_dev = input_allocate_device();
 103         if (!jornadakbd || !input_dev) {
 104                 err = -ENOMEM;
 105                 goto fail1;
 106         }
 107
 108         platform_set_drvdata(pdev, jornadakbd);
 109
 110         memcpy(jornadakbd->keymap, jornada_std_keymap,
 111                 sizeof(jornada_std_keymap));
 112         jornadakbd->input = input_dev;
 113
 114         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
 115         input_dev->name = "HP Jornada 720 keyboard";
 116         input_dev->phys = "jornadakbd/input0";
 117         input_dev->keycode = jornadakbd->keymap;
 118         input_dev->keycodesize = sizeof(unsigned short);
 119         input_dev->keycodemax = ARRAY_SIZE(jornada_std_keymap);
 120         input_dev->id.bustype = BUS_HOST;
 121         input_dev->dev.parent = &pdev->dev;
 122
 123         for (i = 0; i < ARRAY_SIZE(jornadakbd->keymap); i++)
 124                 __set_bit(jornadakbd->keymap[i], input_dev->keybit);
 125         __clear_bit(KEY_RESERVED, input_dev->keybit);
 126
 127         input_set_capability(input_dev, EV_MSC, MSC_SCAN);
 128
 129         err = request_irq(IRQ_GPIO0,
 130                           jornada720_kbd_interrupt,
 131                           IRQF_DISABLED | IRQF_TRIGGER_FALLING,
 132                           "jornadakbd", pdev);
 133         if (err) {
 134                 printk(KERN_INFO "jornadakbd720_kbd: Unable to grab IRQ\n");
 135                 goto fail1;
 136         }
 137
 138         err = input_register_device(jornadakbd->input);
 139         if (err)
 140                 goto fail2;
 141
 142         return 0;
 143
 144  fail2: /* IRQ, DEVICE, MEMORY */
 145         free_irq(IRQ_GPIO0, pdev);
 146  fail1: /* DEVICE, MEMORY */
 147         platform_set_drvdata(pdev, NULL);
 148         input_free_device(input_dev);
 149         kfree(jornadakbd);
 150         return err;
 151 };
 152
 153 static int __devexit jornada720_kbd_remove(struct platform_device *pdev)
 154 {
 155         struct jornadakbd *jornadakbd = platform_get_drvdata(pdev);
 156
 157         free_irq(IRQ_GPIO0, pdev);
 158         platform_set_drvdata(pdev, NULL);
 159         input_unregister_device(jornadakbd->input);
 160         kfree(jornadakbd);
 161
 162         return 0;
 163 }
 164
 165 static struct platform_driver jornada720_kbd_driver = {
 166         .driver  = {
 167                 .name    = "jornada720_kbd",
 168          },
 169         .probe   = jornada720_kbd_probe,
 170         .remove  = __devexit_p(jornada720_kbd_remove),
 171 };
 172
 173 static int __init jornada720_kbd_init(void)
 174 {
 175         return platform_driver_register(&jornada720_kbd_driver);
 176 }
 177
 178 static void __exit jornada720_kbd_exit(void)
 179 {
 180         platform_driver_unregister(&jornada720_kbd_driver);
 181 }
 182
 183 module_init(jornada720_kbd_init);
 184 module_exit(jornada720_kbd_exit);