From bd5f47ec961594b1091839333600008f8166fd00 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Thu, 28 Oct 2010 20:31:50 +0200 Subject: Move ams driver to macintosh The ams driver isn't a hardware monitoring driver, so it shouldn't live under driver/hwmon. drivers/macintosh seems much more appropriate, as the driver is only useful on PowerBooks and iBooks. Signed-off-by: Jean Delvare Cc: Guenter Roeck Cc: Stelian Pop Cc: Michael Hanselmann Cc: Benjamin Herrenschmidt Cc: Grant Likely --- drivers/macintosh/ams/ams-input.c | 157 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 157 insertions(+) create mode 100644 drivers/macintosh/ams/ams-input.c (limited to 'drivers/macintosh/ams/ams-input.c') diff --git a/drivers/macintosh/ams/ams-input.c b/drivers/macintosh/ams/ams-input.c new file mode 100644 index 000000000000..8a712392cd38 --- /dev/null +++ b/drivers/macintosh/ams/ams-input.c @@ -0,0 +1,157 @@ +/* + * Apple Motion Sensor driver (joystick emulation) + * + * 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. + */ + +#include + +#include +#include +#include +#include + +#include "ams.h" + +static unsigned int joystick; +module_param(joystick, bool, S_IRUGO); +MODULE_PARM_DESC(joystick, "Enable the input class device on module load"); + +static unsigned int invert; +module_param(invert, bool, S_IWUSR | S_IRUGO); +MODULE_PARM_DESC(invert, "Invert input data on X and Y axis"); + +static DEFINE_MUTEX(ams_input_mutex); + +static void ams_idev_poll(struct input_polled_dev *dev) +{ + struct input_dev *idev = dev->input; + s8 x, y, z; + + mutex_lock(&ams_info.lock); + + ams_sensors(&x, &y, &z); + + x -= ams_info.xcalib; + y -= ams_info.ycalib; + z -= ams_info.zcalib; + + input_report_abs(idev, ABS_X, invert ? -x : x); + input_report_abs(idev, ABS_Y, invert ? -y : y); + input_report_abs(idev, ABS_Z, z); + + input_sync(idev); + + mutex_unlock(&ams_info.lock); +} + +/* Call with ams_info.lock held! */ +static int ams_input_enable(void) +{ + struct input_dev *input; + s8 x, y, z; + int error; + + ams_sensors(&x, &y, &z); + ams_info.xcalib = x; + ams_info.ycalib = y; + ams_info.zcalib = z; + + ams_info.idev = input_allocate_polled_device(); + if (!ams_info.idev) + return -ENOMEM; + + ams_info.idev->poll = ams_idev_poll; + ams_info.idev->poll_interval = 25; + + input = ams_info.idev->input; + input->name = "Apple Motion Sensor"; + input->id.bustype = ams_info.bustype; + input->id.vendor = 0; + input->dev.parent = &ams_info.of_dev->dev; + + input_set_abs_params(input, ABS_X, -50, 50, 3, 0); + input_set_abs_params(input, ABS_Y, -50, 50, 3, 0); + input_set_abs_params(input, ABS_Z, -50, 50, 3, 0); + + set_bit(EV_ABS, input->evbit); + set_bit(EV_KEY, input->evbit); + set_bit(BTN_TOUCH, input->keybit); + + error = input_register_polled_device(ams_info.idev); + if (error) { + input_free_polled_device(ams_info.idev); + ams_info.idev = NULL; + return error; + } + + joystick = 1; + + return 0; +} + +static void ams_input_disable(void) +{ + if (ams_info.idev) { + input_unregister_polled_device(ams_info.idev); + input_free_polled_device(ams_info.idev); + ams_info.idev = NULL; + } + + joystick = 0; +} + +static ssize_t ams_input_show_joystick(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "%d\n", joystick); +} + +static ssize_t ams_input_store_joystick(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + unsigned long enable; + int error = 0; + + if (strict_strtoul(buf, 0, &enable) || enable > 1) + return -EINVAL; + + mutex_lock(&ams_input_mutex); + + if (enable != joystick) { + if (enable) + error = ams_input_enable(); + else + ams_input_disable(); + } + + mutex_unlock(&ams_input_mutex); + + return error ? error : count; +} + +static DEVICE_ATTR(joystick, S_IRUGO | S_IWUSR, + ams_input_show_joystick, ams_input_store_joystick); + +int ams_input_init(void) +{ + if (joystick) + ams_input_enable(); + + return device_create_file(&ams_info.of_dev->dev, &dev_attr_joystick); +} + +void ams_input_exit(void) +{ + device_remove_file(&ams_info.of_dev->dev, &dev_attr_joystick); + + mutex_lock(&ams_input_mutex); + ams_input_disable(); + mutex_unlock(&ams_input_mutex); +} -- cgit v1.2.3