Input: locomokbd - add 'off' button support for Sharp Collie/Poodle

Enables the Sharp Zaurus Collie and Poodle devices to be turned off
by pressing the "Cancel" button for a few seconds (as designed by
Sharp).

Additional small cleanups:
- removal of unused #defines and variables
- add missing __devinit/__devexit/__devinitconst annotations
- reorganized copyright notice

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 48 insertions, 25 deletions

diff --git a/drivers/input/keyboard/locomokbd.c b/drivers/input/keyboard/locomokbd.c
index 5a0ca18d6755..9caed30f3bbb 100644
--- a/drivers/input/keyboard/locomokbd.c
+++ b/drivers/input/keyboard/locomokbd.c
@@ -1,14 +1,12 @@
 /*
- *  Copyright (c) 2005 John Lenz
+ * LoCoMo keyboard driver for Linux-based ARM PDAs:
+ *      - SHARP Zaurus Collie (SL-5500)
+ *      - SHARP Zaurus Poodle (SL-5600)
  *
+ * Copyright (c) 2005 John Lenz
  * Based on from xtkbd.c
- */
-
-/*
- * LoCoMo keyboard driver for Linux/ARM
- */
-
-/*
+ *
+ *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
@@ -47,7 +45,8 @@ MODULE_LICENSE("GPL");
 #define KEY_CONTACT             KEY_F18
 #define KEY_CENTER              KEY_F15
 
-static unsigned char locomokbd_keycode[LOCOMOKBD_NUMKEYS] = {
+static const unsigned char
+locomokbd_keycode[LOCOMOKBD_NUMKEYS] __devinitconst = {
         0, KEY_ESC, KEY_ACTIVITY, 0, 0, 0, 0, 0, 0, 0,                          /* 0 - 9 */
         0, 0, 0, 0, 0, 0, 0, KEY_MENU, KEY_HOME, KEY_CONTACT,                   /* 10 - 19 */
         0, 0, 0, 0, 0, 0, 0, 0, 0, 0,                                           /* 20 - 29 */
@@ -67,22 +66,21 @@ static unsigned char locomokbd_keycode[LOCOMOKBD_NUMKEYS] = {
 #define KB_COLS                 8
 #define KB_ROWMASK(r)           (1 << (r))
 #define SCANCODE(c,r)           ( ((c)<<4) + (r) + 1 )
-#define NR_SCANCODES            128
 
 #define KB_DELAY                8
 #define SCAN_INTERVAL           (HZ/10)
-#define LOCOMOKBD_PRESSED       1
 
 struct locomokbd {
         unsigned char keycode[LOCOMOKBD_NUMKEYS];
         struct input_dev *input;
         char phys[32];
 
-        struct locomo_dev *ldev;
         unsigned long base;
         spinlock_t lock;
 
         struct timer_list timer;
+        unsigned long suspend_jiffies;
+        unsigned int count_cancel;
 };
 
 /* helper functions for reading the keyboard matrix */
@@ -128,7 +126,7 @@ static inline void locomokbd_reset_col(unsigned long membase, int col)
 /* Scan the hardware keyboard and push any changes up through the input layer */
 static void locomokbd_scankeyboard(struct locomokbd *locomokbd)
 {
-        unsigned int row, col, rowd, scancode;
+        unsigned int row, col, rowd;
         unsigned long flags;
         unsigned int num_pressed;
         unsigned long membase = locomokbd->base;
@@ -145,13 +143,33 @@ static void locomokbd_scankeyboard(struct locomokbd *locomokbd)
 
                 rowd = ~locomo_readl(membase + LOCOMO_KIB);
                 for (row = 0; row < KB_ROWS; row++) {
+                        unsigned int scancode, pressed, key;
+
                         scancode = SCANCODE(col, row);
-                        if (rowd & KB_ROWMASK(row)) {
-                                num_pressed += 1;
-                                input_report_key(locomokbd->input, locomokbd->keycode[scancode], 1);
-                        } else {
-                                input_report_key(locomokbd->input, locomokbd->keycode[scancode], 0);
-                        }
+                        pressed = rowd & KB_ROWMASK(row);
+                        key = locomokbd->keycode[scancode];
+
+                        input_report_key(locomokbd->input, key, pressed);
+                        if (likely(!pressed))
+                                continue;
+
+                        num_pressed++;
+
+                        /* The "Cancel/ESC" key is labeled "On/Off" on
+                         * Collie and Poodle and should suspend the device
+                         * if it was pressed for more than a second. */
+                        if (unlikely(key == KEY_ESC)) {
+                                if (!time_after(jiffies,
+                                        locomokbd->suspend_jiffies + HZ))
+                                        continue;
+                                if (locomokbd->count_cancel++
+                                        != (HZ/SCAN_INTERVAL + 1))
+                                        continue;
+                                input_event(locomokbd->input, EV_PWR,
+                                        KEY_SUSPEND, 1);
+                                locomokbd->suspend_jiffies = jiffies;
+                        } else
+                                locomokbd->count_cancel = 0;
                 }
                 locomokbd_reset_col(membase, col);
         }
@@ -162,6 +180,8 @@ static void locomokbd_scankeyboard(struct locomokbd *locomokbd)
         /* if any keys are pressed, enable the timer */
         if (num_pressed)
                 mod_timer(&locomokbd->timer, jiffies + SCAN_INTERVAL);
+        else
+                locomokbd->count_cancel = 0;
 
         spin_unlock_irqrestore(&locomokbd->lock, flags);
 }
@@ -186,10 +206,11 @@ static irqreturn_t locomokbd_interrupt(int irq, void *dev_id)
 static void locomokbd_timer_callback(unsigned long data)
 {
         struct locomokbd *locomokbd = (struct locomokbd *) data;
+
         locomokbd_scankeyboard(locomokbd);
 }
 
-static int locomokbd_probe(struct locomo_dev *dev)
+static int __devinit locomokbd_probe(struct locomo_dev *dev)
 {
         struct locomokbd *locomokbd;
         struct input_dev *input_dev;
@@ -211,7 +232,6 @@ static int locomokbd_probe(struct locomo_dev *dev)
                 goto err_free_mem;
         }
 
-        locomokbd->ldev = dev;
         locomo_set_drvdata(dev, locomokbd);
 
         locomokbd->base = (unsigned long) dev->mapbase;
@@ -222,6 +242,8 @@ static int locomokbd_probe(struct locomo_dev *dev)
         locomokbd->timer.function = locomokbd_timer_callback;
         locomokbd->timer.data = (unsigned long) locomokbd;
 
+        locomokbd->suspend_jiffies = jiffies;
+
         locomokbd->input = input_dev;
         strcpy(locomokbd->phys, "locomokbd/input0");
 
@@ -233,9 +255,10 @@ static int locomokbd_probe(struct locomo_dev *dev)
         input_dev->id.version = 0x0100;
         input_dev->dev.parent = &dev->dev;
 
-        input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
+        input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) |
+                                BIT_MASK(EV_PWR);
         input_dev->keycode = locomokbd->keycode;
-        input_dev->keycodesize = sizeof(unsigned char);
+        input_dev->keycodesize = sizeof(locomokbd_keycode[0]);
         input_dev->keycodemax = ARRAY_SIZE(locomokbd_keycode);
 
         memcpy(locomokbd->keycode, locomokbd_keycode, sizeof(locomokbd->keycode));
@@ -268,7 +291,7 @@ static int locomokbd_probe(struct locomo_dev *dev)
         return err;
 }
 
-static int locomokbd_remove(struct locomo_dev *dev)
+static int __devexit locomokbd_remove(struct locomo_dev *dev)
 {
         struct locomokbd *locomokbd = locomo_get_drvdata(dev);
 
@@ -292,7 +315,7 @@ static struct locomo_driver keyboard_driver = {
         },
         .devid  = LOCOMO_DEVID_KEYBOARD,
         .probe  = locomokbd_probe,
-        .remove = locomokbd_remove,
+        .remove = __devexit_p(locomokbd_remove),
 };
 
 static int __init locomokbd_init(void)