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 #include <linux/slab.h>
  27
  28 #include <mach/jornada720.h>
  29 #include <mach/hardware.h>
  30
  31 MODULE_AUTHOR("Kristoffer Ericson <Kristoffer.Ericson@gmail.com>");
  32 MODULE_DESCRIPTION("HP Jornada 710/720/728 keyboard driver");
  33 MODULE_LICENSE("GPL v2");
  34
  35 static unsigned short jornada_std_keymap[128] = {                                       /* ROW */
  36         0, KEY_ESC, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7,             /* #1  */
  37         KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_MUTE,       /*  -> */
  38         0, KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6, KEY_7, KEY_8, KEY_9,               /* #2  */
  39         KEY_0, KEY_MINUS, KEY_EQUAL,0, 0, 0,                                            /*  -> */
  40         0, KEY_Q, KEY_W, KEY_E, KEY_R, KEY_T, KEY_Y, KEY_U, KEY_I, KEY_O,               /* #3  */
  41         KEY_P, KEY_BACKSLASH, KEY_BACKSPACE, 0, 0, 0,                                   /*  -> */
  42         0, KEY_A, KEY_S, KEY_D, KEY_F, KEY_G, KEY_H, KEY_J, KEY_K, KEY_L,               /* #4  */
  43         KEY_SEMICOLON, KEY_LEFTBRACE, KEY_RIGHTBRACE, 0, 0, 0,                          /*  -> */
  44         0, KEY_Z, KEY_X, KEY_C, KEY_V, KEY_B, KEY_N, KEY_M, KEY_COMMA,                  /* #5  */
  45         KEY_DOT, KEY_KPMINUS, KEY_APOSTROPHE, KEY_ENTER, 0, 0,0,                        /*  -> */
  46         0, KEY_TAB, 0, KEY_LEFTSHIFT, 0, KEY_APOSTROPHE, 0, 0, 0, 0,                    /* #6  */
  47         KEY_UP, 0, KEY_RIGHTSHIFT, 0, 0, 0,0, 0, 0, 0, 0, KEY_LEFTALT, KEY_GRAVE,       /*  -> */
  48         0, 0, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0, 0,0, KEY_KPASTERISK,              /*  -> */
  49         KEY_LEFTCTRL, 0, KEY_SPACE, 0, 0, 0, KEY_SLASH, KEY_DELETE, 0, 0,               /*  -> */
  50         0, 0, 0, KEY_POWER,                                                             /*  -> */
  51 };
  52
  53 struct jornadakbd {
  54         unsigned short keymap[ARRAY_SIZE(jornada_std_keymap)];
  55         struct input_dev *input;
  56 };
  57
  58 static irqreturn_t jornada720_kbd_interrupt(int irq, void *dev_id)
  59 {
  60         struct platform_device *pdev = dev_id;
  61         struct jornadakbd *jornadakbd = platform_get_drvdata(pdev);
  62         struct input_dev *input = jornadakbd->input;
  63         u8 count, kbd_data, scan_code;
  64
  65         /* startup ssp with spinlock */
  66         jornada_ssp_start();
  67
  68         if (jornada_ssp_inout(GETSCANKEYCODE) != TXDUMMY) {
  69                 printk(KERN_DEBUG
  70                         "jornada720_kbd: "
  71                         "GetKeycode command failed with ETIMEDOUT, "
  72                         "flushed bus\n");
  73         } else {
  74                 /* How many keycodes are waiting for us? */
  75                 count = jornada_ssp_byte(TXDUMMY);
  76
  77                 /* Lets drag them out one at a time */
  78                 while (count--) {
  79                         /* Exchange TxDummy for location (keymap[kbddata]) */
  80                         kbd_data = jornada_ssp_byte(TXDUMMY);
  81                         scan_code = kbd_data & 0x7f;
  82
  83                         input_event(input, EV_MSC, MSC_SCAN, scan_code);
  84                         input_report_key(input, jornadakbd->keymap[scan_code],
  85                                          !(kbd_data & 0x80));
  86                         input_sync(input);
  87                 }
  88         }
  89
  90         /* release spinlock and turn off ssp */
  91         jornada_ssp_end();
  92
  93         return IRQ_HANDLED;
  94 };
  95
  96 static int __devinit jornada720_kbd_probe(struct platform_device *pdev)
  97 {
  98         struct jornadakbd *jornadakbd;
  99         struct input_dev *input_dev;
 100         int i, err;
 101
 102         jornadakbd = kzalloc(sizeof(struct jornadakbd), GFP_KERNEL);
 103         input_dev = input_allocate_device();
 104         if (!jornadakbd || !input_dev) {
 105                 err = -ENOMEM;
 106                 goto fail1;
 107         }
 108
 109         platform_set_drvdata(pdev, jornadakbd);
 110
 111         memcpy(jornadakbd->keymap, jornada_std_keymap,
 112                 sizeof(jornada_std_keymap));
 113         jornadakbd->input = input_dev;
 114
 115         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
 116         input_dev->name = "HP Jornada 720 keyboard";
 117         input_dev->phys = "jornadakbd/input0";
 118         input_dev->keycode = jornadakbd->keymap;
 119         input_dev->keycodesize = sizeof(unsigned short);
 120         input_dev->keycodemax = ARRAY_SIZE(jornada_std_keymap);
 121         input_dev->id.bustype = BUS_HOST;
 122         input_dev->dev.parent = &pdev->dev;
 123
 124         for (i = 0; i < ARRAY_SIZE(jornadakbd->keymap); i++)
 125                 __set_bit(jornadakbd->keymap[i], input_dev->keybit);
 126         __clear_bit(KEY_RESERVED, input_dev->keybit);
 127
 128         input_set_capability(input_dev, EV_MSC, MSC_SCAN);
 129
 130         err = request_irq(IRQ_GPIO0,
 131                           jornada720_kbd_interrupt,
 132                           IRQF_TRIGGER_FALLING,
 133                           "jornadakbd", pdev);
 134         if (err) {
 135                 printk(KERN_INFO "jornadakbd720_kbd: Unable to grab IRQ\n");
 136                 goto fail1;
 137         }
 138
 139         err = input_register_device(jornadakbd->input);
 140         if (err)
 141                 goto fail2;
 142
 143         return 0;
 144
 145  fail2: /* IRQ, DEVICE, MEMORY */
 146         free_irq(IRQ_GPIO0, pdev);
 147  fail1: /* DEVICE, MEMORY */
 148         platform_set_drvdata(pdev, NULL);
 149         input_free_device(input_dev);
 150         kfree(jornadakbd);
 151         return err;
 152 };
 153
 154 static int __devexit jornada720_kbd_remove(struct platform_device *pdev)
 155 {
 156         struct jornadakbd *jornadakbd = platform_get_drvdata(pdev);
 157
 158         free_irq(IRQ_GPIO0, pdev);
 159         platform_set_drvdata(pdev, NULL);
 160         input_unregister_device(jornadakbd->input);
 161         kfree(jornadakbd);
 162
 163         return 0;
 164 }
 165
 166 /* work with hotplug and coldplug */
 167 MODULE_ALIAS("platform:jornada720_kbd");
 168
 169 static struct platform_driver jornada720_kbd_driver = {
 170         .driver  = {
 171                 .name    = "jornada720_kbd",
 172                 .owner  = THIS_MODULE,
 173          },
 174         .probe   = jornada720_kbd_probe,
 175         .remove  = __devexit_p(jornada720_kbd_remove),
 176 };
 177 module_platform_driver(jornada720_kbd_driver);