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Subject[PATCH 02/37] Input: locomokbd - add 'off' button support for Sharp Collie/Poodle
From
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>
---
drivers/input/keyboard/locomokbd.c | 73 +++++++++++++++++++++++------------
1 files changed, 48 insertions(+), 25 deletions(-)

diff --git a/drivers/input/keyboard/locomokbd.c b/drivers/input/keyboard/locomokbd.c
index 5a0ca18..9caed30 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)
--
1.5.5.rc2.6.gf58d



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