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Linux/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/input.h>
 22 #include <linux/kernel.h>
 23 #include <linux/module.h>
 24 #include <linux/platform_device.h>
 25 #include <linux/slab.h>
 26 
 27 #include <mach/jornada720.h>
 28 
 29 MODULE_AUTHOR("Kristoffer Ericson <Kristoffer.Ericson@gmail.com>");
 30 MODULE_DESCRIPTION("HP Jornada 710/720/728 keyboard driver");
 31 MODULE_LICENSE("GPL v2");
 32 
 33 static unsigned short jornada_std_keymap[128] = {                                       /* ROW */
 34         0, KEY_ESC, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7,             /* #1  */
 35         KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_MUTE,       /*  -> */
 36         0, KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6, KEY_7, KEY_8, KEY_9,               /* #2  */
 37         KEY_0, KEY_MINUS, KEY_EQUAL,0, 0, 0,                                            /*  -> */
 38         0, KEY_Q, KEY_W, KEY_E, KEY_R, KEY_T, KEY_Y, KEY_U, KEY_I, KEY_O,               /* #3  */
 39         KEY_P, KEY_BACKSLASH, KEY_BACKSPACE, 0, 0, 0,                                   /*  -> */
 40         0, KEY_A, KEY_S, KEY_D, KEY_F, KEY_G, KEY_H, KEY_J, KEY_K, KEY_L,               /* #4  */
 41         KEY_SEMICOLON, KEY_LEFTBRACE, KEY_RIGHTBRACE, 0, 0, 0,                          /*  -> */
 42         0, KEY_Z, KEY_X, KEY_C, KEY_V, KEY_B, KEY_N, KEY_M, KEY_COMMA,                  /* #5  */
 43         KEY_DOT, KEY_KPMINUS, KEY_APOSTROPHE, KEY_ENTER, 0, 0,0,                        /*  -> */
 44         0, KEY_TAB, 0, KEY_LEFTSHIFT, 0, KEY_APOSTROPHE, 0, 0, 0, 0,                    /* #6  */
 45         KEY_UP, 0, KEY_RIGHTSHIFT, 0, 0, 0,0, 0, 0, 0, 0, KEY_LEFTALT, KEY_GRAVE,       /*  -> */
 46         0, 0, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0, 0,0, KEY_KPASTERISK,              /*  -> */
 47         KEY_LEFTCTRL, 0, KEY_SPACE, 0, 0, 0, KEY_SLASH, KEY_DELETE, 0, 0,               /*  -> */
 48         0, 0, 0, KEY_POWER,                                                             /*  -> */
 49 };
 50 
 51 struct jornadakbd {
 52         unsigned short keymap[ARRAY_SIZE(jornada_std_keymap)];
 53         struct input_dev *input;
 54 };
 55 
 56 static irqreturn_t jornada720_kbd_interrupt(int irq, void *dev_id)
 57 {
 58         struct platform_device *pdev = dev_id;
 59         struct jornadakbd *jornadakbd = platform_get_drvdata(pdev);
 60         struct input_dev *input = jornadakbd->input;
 61         u8 count, kbd_data, scan_code;
 62 
 63         /* startup ssp with spinlock */
 64         jornada_ssp_start();
 65 
 66         if (jornada_ssp_inout(GETSCANKEYCODE) != TXDUMMY) {
 67                 dev_dbg(&pdev->dev,
 68                         "GetKeycode command failed with ETIMEDOUT, flushed bus\n");
 69         } else {
 70                 /* How many keycodes are waiting for us? */
 71                 count = jornada_ssp_byte(TXDUMMY);
 72 
 73                 /* Lets drag them out one at a time */
 74                 while (count--) {
 75                         /* Exchange TxDummy for location (keymap[kbddata]) */
 76                         kbd_data = jornada_ssp_byte(TXDUMMY);
 77                         scan_code = kbd_data & 0x7f;
 78 
 79                         input_event(input, EV_MSC, MSC_SCAN, scan_code);
 80                         input_report_key(input, jornadakbd->keymap[scan_code],
 81                                          !(kbd_data & 0x80));
 82                         input_sync(input);
 83                 }
 84         }
 85 
 86         /* release spinlock and turn off ssp */
 87         jornada_ssp_end();
 88 
 89         return IRQ_HANDLED;
 90 };
 91 
 92 static int jornada720_kbd_probe(struct platform_device *pdev)
 93 {
 94         struct jornadakbd *jornadakbd;
 95         struct input_dev *input_dev;
 96         int i, err, irq;
 97 
 98         irq = platform_get_irq(pdev, 0);
 99         if (irq <= 0)
100                 return irq < 0 ? irq : -EINVAL;
101 
102         jornadakbd = devm_kzalloc(&pdev->dev, sizeof(*jornadakbd), GFP_KERNEL);
103         input_dev = devm_input_allocate_device(&pdev->dev);
104         if (!jornadakbd || !input_dev)
105                 return -ENOMEM;
106 
107         platform_set_drvdata(pdev, jornadakbd);
108 
109         memcpy(jornadakbd->keymap, jornada_std_keymap,
110                 sizeof(jornada_std_keymap));
111         jornadakbd->input = input_dev;
112 
113         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
114         input_dev->name = "HP Jornada 720 keyboard";
115         input_dev->phys = "jornadakbd/input0";
116         input_dev->keycode = jornadakbd->keymap;
117         input_dev->keycodesize = sizeof(unsigned short);
118         input_dev->keycodemax = ARRAY_SIZE(jornada_std_keymap);
119         input_dev->id.bustype = BUS_HOST;
120         input_dev->dev.parent = &pdev->dev;
121 
122         for (i = 0; i < ARRAY_SIZE(jornadakbd->keymap); i++)
123                 __set_bit(jornadakbd->keymap[i], input_dev->keybit);
124         __clear_bit(KEY_RESERVED, input_dev->keybit);
125 
126         input_set_capability(input_dev, EV_MSC, MSC_SCAN);
127 
128         err = devm_request_irq(&pdev->dev, irq, jornada720_kbd_interrupt,
129                                IRQF_TRIGGER_FALLING, "jornadakbd", pdev);
130         if (err) {
131                 dev_err(&pdev->dev, "unable to grab IRQ%d: %d\n", irq, err);
132                 return err;
133         }
134 
135         return input_register_device(jornadakbd->input);
136 };
137 
138 /* work with hotplug and coldplug */
139 MODULE_ALIAS("platform:jornada720_kbd");
140 
141 static struct platform_driver jornada720_kbd_driver = {
142         .driver  = {
143                 .name    = "jornada720_kbd",
144          },
145         .probe   = jornada720_kbd_probe,
146 };
147 module_platform_driver(jornada720_kbd_driver);
148 

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