diff options
Diffstat (limited to 'drivers/hwmon/ams/ams-core.c')
| -rw-r--r-- | drivers/hwmon/ams/ams-core.c | 250 |
1 files changed, 0 insertions, 250 deletions
diff --git a/drivers/hwmon/ams/ams-core.c b/drivers/hwmon/ams/ams-core.c deleted file mode 100644 index 2ad62c339cd2..000000000000 --- a/drivers/hwmon/ams/ams-core.c +++ /dev/null @@ -1,250 +0,0 @@ -/* - * 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> -#include <linux/of_platform.h> -#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) -{ - unsigned long flags; - u8 irqs_to_clear; - - mutex_lock(&ams_info.lock); - - spin_lock_irqsave(&ams_info.irq_lock, flags); - irqs_to_clear = ams_info.worker_irqs; - - if (ams_info.worker_irqs & AMS_IRQ_FREEFALL) { - if (verbose) - printk(KERN_INFO "ams: freefall detected!\n"); - - ams_info.worker_irqs &= ~AMS_IRQ_FREEFALL; - } - - if (ams_info.worker_irqs & AMS_IRQ_SHOCK) { - if (verbose) - printk(KERN_INFO "ams: shock detected!\n"); - - ams_info.worker_irqs &= ~AMS_IRQ_SHOCK; - } - - spin_unlock_irqrestore(&ams_info.irq_lock, flags); - - ams_info.clear_irq(irqs_to_clear); - - mutex_unlock(&ams_info.lock); -} - -/* Call with ams_info.lock held! */ -int ams_sensor_attach(void) -{ - int result; - const u32 *prop; - - /* Get orientation */ - prop = of_get_property(ams_info.of_node, "orientation", NULL); - 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"); - if (np && of_device_is_compatible(np, "AAPL,accelerometer_1")) - /* Found I2C motion sensor */ - return ams_i2c_init(np); -#endif - -#ifdef CONFIG_SENSORS_AMS_PMU - np = of_find_node_by_name(NULL, "sms"); - if (np && of_device_is_compatible(np, "sms")) - /* Found PMU motion sensor */ - return ams_pmu_init(np); -#endif - return -ENODEV; -} - -void ams_sensor_detach(void) -{ - /* Remove input device */ - ams_input_exit(); - - /* Remove attributes */ - device_remove_file(&ams_info.of_dev->dev, &dev_attr_current); - - /* Flush interrupt worker - * - * We do this after ams_info.exit(), because an interrupt might - * have arrived before disabling them. - */ - flush_scheduled_work(); - - /* Remove device */ - of_device_unregister(ams_info.of_dev); - - /* Remove handler */ - pmf_unregister_irq_client(&ams_shock_client); - pmf_unregister_irq_client(&ams_freefall_client); -} - -static void __exit ams_exit(void) -{ - /* Shut down implementation */ - ams_info.exit(); -} - -MODULE_AUTHOR("Stelian Pop, Michael Hanselmann"); -MODULE_DESCRIPTION("Apple Motion Sensor driver"); -MODULE_LICENSE("GPL"); - -module_init(ams_init); -module_exit(ams_exit); |