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