2006-12-12 10:18:30 -07:00
|
|
|
/*
|
|
|
|
* Apple Motion Sensor driver
|
|
|
|
*
|
|
|
|
* Copyright (C) 2005 Stelian Pop (stelian@popies.net)
|
|
|
|
* Copyright (C) 2006 Michael Hanselmann (linux-kernel@hansmi.ch)
|
|
|
|
*
|
|
|
|
* 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
|
|
|
|
* (at your option) any later version.
|
|
|
|
*
|
|
|
|
* This program is distributed in the hope that it will be useful,
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
|
* GNU General Public License for more details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
|
|
* along with this program; if not, write to the Free Software
|
|
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/types.h>
|
|
|
|
#include <linux/errno.h>
|
|
|
|
#include <linux/init.h>
|
2008-05-23 00:25:50 -06:00
|
|
|
#include <linux/of_platform.h>
|
2006-12-12 10:18:30 -07:00
|
|
|
#include <asm/pmac_pfunc.h>
|
|
|
|
|
|
|
|
#include "ams.h"
|
|
|
|
|
|
|
|
/* There is only one motion sensor per machine */
|
|
|
|
struct ams ams_info;
|
|
|
|
|
|
|
|
static unsigned int verbose;
|
|
|
|
module_param(verbose, bool, 0644);
|
|
|
|
MODULE_PARM_DESC(verbose, "Show free falls and shocks in kernel output");
|
|
|
|
|
|
|
|
/* Call with ams_info.lock held! */
|
|
|
|
void ams_sensors(s8 *x, s8 *y, s8 *z)
|
|
|
|
{
|
|
|
|
u32 orient = ams_info.vflag? ams_info.orient1 : ams_info.orient2;
|
|
|
|
|
|
|
|
if (orient & 0x80)
|
|
|
|
/* X and Y swapped */
|
|
|
|
ams_info.get_xyz(y, x, z);
|
|
|
|
else
|
|
|
|
ams_info.get_xyz(x, y, z);
|
|
|
|
|
|
|
|
if (orient & 0x04)
|
|
|
|
*z = ~(*z);
|
|
|
|
if (orient & 0x02)
|
|
|
|
*y = ~(*y);
|
|
|
|
if (orient & 0x01)
|
|
|
|
*x = ~(*x);
|
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t ams_show_current(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
|
|
|
s8 x, y, z;
|
|
|
|
|
|
|
|
mutex_lock(&ams_info.lock);
|
|
|
|
ams_sensors(&x, &y, &z);
|
|
|
|
mutex_unlock(&ams_info.lock);
|
|
|
|
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%d %d %d\n", x, y, z);
|
|
|
|
}
|
|
|
|
|
|
|
|
static DEVICE_ATTR(current, S_IRUGO, ams_show_current, NULL);
|
|
|
|
|
|
|
|
static void ams_handle_irq(void *data)
|
|
|
|
{
|
|
|
|
enum ams_irq irq = *((enum ams_irq *)data);
|
|
|
|
|
|
|
|
spin_lock(&ams_info.irq_lock);
|
|
|
|
|
|
|
|
ams_info.worker_irqs |= irq;
|
|
|
|
schedule_work(&ams_info.worker);
|
|
|
|
|
|
|
|
spin_unlock(&ams_info.irq_lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
static enum ams_irq ams_freefall_irq_data = AMS_IRQ_FREEFALL;
|
|
|
|
static struct pmf_irq_client ams_freefall_client = {
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.handler = ams_handle_irq,
|
|
|
|
.data = &ams_freefall_irq_data,
|
|
|
|
};
|
|
|
|
|
|
|
|
static enum ams_irq ams_shock_irq_data = AMS_IRQ_SHOCK;
|
|
|
|
static struct pmf_irq_client ams_shock_client = {
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.handler = ams_handle_irq,
|
|
|
|
.data = &ams_shock_irq_data,
|
|
|
|
};
|
|
|
|
|
|
|
|
/* Once hard disk parking is implemented in the kernel, this function can
|
|
|
|
* trigger it.
|
|
|
|
*/
|
|
|
|
static void ams_worker(struct work_struct *work)
|
|
|
|
{
|
2008-10-17 09:51:13 -06:00
|
|
|
unsigned long flags;
|
|
|
|
u8 irqs_to_clear;
|
2006-12-12 10:18:30 -07:00
|
|
|
|
2008-10-17 09:51:13 -06:00
|
|
|
mutex_lock(&ams_info.lock);
|
2006-12-12 10:18:30 -07:00
|
|
|
|
2008-10-17 09:51:13 -06:00
|
|
|
spin_lock_irqsave(&ams_info.irq_lock, flags);
|
|
|
|
irqs_to_clear = ams_info.worker_irqs;
|
2006-12-12 10:18:30 -07:00
|
|
|
|
2008-10-17 09:51:13 -06:00
|
|
|
if (ams_info.worker_irqs & AMS_IRQ_FREEFALL) {
|
|
|
|
if (verbose)
|
|
|
|
printk(KERN_INFO "ams: freefall detected!\n");
|
2006-12-12 10:18:30 -07:00
|
|
|
|
2008-10-17 09:51:13 -06:00
|
|
|
ams_info.worker_irqs &= ~AMS_IRQ_FREEFALL;
|
|
|
|
}
|
2006-12-12 10:18:30 -07:00
|
|
|
|
2008-10-17 09:51:13 -06:00
|
|
|
if (ams_info.worker_irqs & AMS_IRQ_SHOCK) {
|
|
|
|
if (verbose)
|
|
|
|
printk(KERN_INFO "ams: shock detected!\n");
|
2006-12-12 10:18:30 -07:00
|
|
|
|
2008-10-17 09:51:13 -06:00
|
|
|
ams_info.worker_irqs &= ~AMS_IRQ_SHOCK;
|
|
|
|
}
|
2006-12-12 10:18:30 -07:00
|
|
|
|
2008-10-17 09:51:13 -06:00
|
|
|
spin_unlock_irqrestore(&ams_info.irq_lock, flags);
|
2006-12-12 10:18:30 -07:00
|
|
|
|
2008-10-17 09:51:13 -06:00
|
|
|
ams_info.clear_irq(irqs_to_clear);
|
2006-12-12 10:18:30 -07:00
|
|
|
|
|
|
|
mutex_unlock(&ams_info.lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Call with ams_info.lock held! */
|
|
|
|
int ams_sensor_attach(void)
|
|
|
|
{
|
|
|
|
int result;
|
2007-04-02 18:52:17 -06:00
|
|
|
const u32 *prop;
|
2006-12-12 10:18:30 -07:00
|
|
|
|
|
|
|
/* Get orientation */
|
2007-04-30 21:54:02 -06:00
|
|
|
prop = of_get_property(ams_info.of_node, "orientation", NULL);
|
2006-12-12 10:18:30 -07:00
|
|
|
if (!prop)
|
|
|
|
return -ENODEV;
|
|
|
|
ams_info.orient1 = *prop;
|
|
|
|
ams_info.orient2 = *(prop + 1);
|
|
|
|
|
|
|
|
/* Register freefall interrupt handler */
|
|
|
|
result = pmf_register_irq_client(ams_info.of_node,
|
|
|
|
"accel-int-1",
|
|
|
|
&ams_freefall_client);
|
|
|
|
if (result < 0)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
/* Reset saved irqs */
|
|
|
|
ams_info.worker_irqs = 0;
|
|
|
|
|
|
|
|
/* Register shock interrupt handler */
|
|
|
|
result = pmf_register_irq_client(ams_info.of_node,
|
|
|
|
"accel-int-2",
|
|
|
|
&ams_shock_client);
|
|
|
|
if (result < 0)
|
|
|
|
goto release_freefall;
|
|
|
|
|
|
|
|
/* Create device */
|
|
|
|
ams_info.of_dev = of_platform_device_create(ams_info.of_node, "ams", NULL);
|
|
|
|
if (!ams_info.of_dev) {
|
|
|
|
result = -ENODEV;
|
|
|
|
goto release_shock;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Create attributes */
|
|
|
|
result = device_create_file(&ams_info.of_dev->dev, &dev_attr_current);
|
|
|
|
if (result)
|
|
|
|
goto release_of;
|
|
|
|
|
|
|
|
ams_info.vflag = !!(ams_info.get_vendor() & 0x10);
|
|
|
|
|
|
|
|
/* Init input device */
|
|
|
|
result = ams_input_init();
|
|
|
|
if (result)
|
|
|
|
goto release_device_file;
|
|
|
|
|
|
|
|
return result;
|
|
|
|
release_device_file:
|
|
|
|
device_remove_file(&ams_info.of_dev->dev, &dev_attr_current);
|
|
|
|
release_of:
|
|
|
|
of_device_unregister(ams_info.of_dev);
|
|
|
|
release_shock:
|
|
|
|
pmf_unregister_irq_client(&ams_shock_client);
|
|
|
|
release_freefall:
|
|
|
|
pmf_unregister_irq_client(&ams_freefall_client);
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
int __init ams_init(void)
|
|
|
|
{
|
|
|
|
struct device_node *np;
|
|
|
|
|
|
|
|
spin_lock_init(&ams_info.irq_lock);
|
|
|
|
mutex_init(&ams_info.lock);
|
|
|
|
INIT_WORK(&ams_info.worker, ams_worker);
|
|
|
|
|
|
|
|
#ifdef CONFIG_SENSORS_AMS_I2C
|
|
|
|
np = of_find_node_by_name(NULL, "accelerometer");
|
2007-05-03 01:26:52 -06:00
|
|
|
if (np && of_device_is_compatible(np, "AAPL,accelerometer_1"))
|
2006-12-12 10:18:30 -07:00
|
|
|
/* Found I2C motion sensor */
|
|
|
|
return ams_i2c_init(np);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#ifdef CONFIG_SENSORS_AMS_PMU
|
|
|
|
np = of_find_node_by_name(NULL, "sms");
|
2007-05-03 01:26:52 -06:00
|
|
|
if (np && of_device_is_compatible(np, "sms"))
|
2006-12-12 10:18:30 -07:00
|
|
|
/* Found PMU motion sensor */
|
|
|
|
return ams_pmu_init(np);
|
|
|
|
#endif
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
void ams_exit(void)
|
|
|
|
{
|
2008-10-17 09:51:12 -06:00
|
|
|
/* Remove input device */
|
|
|
|
ams_input_exit();
|
2006-12-12 10:18:30 -07:00
|
|
|
|
2008-10-17 09:51:12 -06:00
|
|
|
/* Remove attributes */
|
|
|
|
device_remove_file(&ams_info.of_dev->dev, &dev_attr_current);
|
2006-12-12 10:18:30 -07:00
|
|
|
|
2008-10-17 09:51:12 -06:00
|
|
|
/* Shut down implementation */
|
|
|
|
ams_info.exit();
|
2006-12-12 10:18:30 -07:00
|
|
|
|
2008-10-17 09:51:12 -06:00
|
|
|
/* Flush interrupt worker
|
|
|
|
*
|
|
|
|
* We do this after ams_info.exit(), because an interrupt might
|
|
|
|
* have arrived before disabling them.
|
|
|
|
*/
|
|
|
|
flush_scheduled_work();
|
2006-12-12 10:18:30 -07:00
|
|
|
|
2008-10-17 09:51:12 -06:00
|
|
|
/* Remove device */
|
|
|
|
of_device_unregister(ams_info.of_dev);
|
2006-12-12 10:18:30 -07:00
|
|
|
|
2008-10-17 09:51:12 -06:00
|
|
|
/* Remove handler */
|
|
|
|
pmf_unregister_irq_client(&ams_shock_client);
|
|
|
|
pmf_unregister_irq_client(&ams_freefall_client);
|
2006-12-12 10:18:30 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Stelian Pop, Michael Hanselmann");
|
|
|
|
MODULE_DESCRIPTION("Apple Motion Sensor driver");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|
|
|
|
module_init(ams_init);
|
|
|
|
module_exit(ams_exit);
|