HARD DRIVE ACTIVE PROTECTION SYSTEM (HDAPS) DRIVER
M: Frank Seidel <frank@f-seidel.de>
-L: lm-sensors@lm-sensors.org
+L: platform-driver-x86@vger.kernel.org
W: http://www.kernel.org/pub/linux/kernel/people/fseidel/hdaps/
S: Maintained
-F: drivers/hwmon/hdaps.c
+F: drivers/platform/x86/hdaps.c
HWPOISON MEMORY FAILURE HANDLING
M: Andi Kleen <andi@firstfloor.org>
This driver provides support for the Ultra45 workstation environmental
sensors.
-config SENSORS_HDAPS
- tristate "IBM Hard Drive Active Protection System (hdaps)"
- depends on INPUT && X86
- select INPUT_POLLDEV
- default n
- help
- This driver provides support for the IBM Hard Drive Active Protection
- System (hdaps), which provides an accelerometer and other misc. data.
- ThinkPads starting with the R50, T41, and X40 are supported. The
- accelerometer data is readable via sysfs.
-
- This driver also provides an absolute input class device, allowing
- the laptop to act as a pinball machine-esque joystick.
-
- If your ThinkPad is not recognized by the driver, please update to latest
- BIOS. This is especially the case for some R52 ThinkPads.
-
- Say Y here if you have an applicable laptop and want to experience
- the awesome power of hdaps.
-
config SENSORS_LIS3_SPI
tristate "STMicroeletronics LIS3LV02Dx three-axis digital accelerometer (SPI)"
depends on !ACPI && SPI_MASTER && INPUT
obj-$(CONFIG_SENSORS_GL518SM) += gl518sm.o
obj-$(CONFIG_SENSORS_GL520SM) += gl520sm.o
obj-$(CONFIG_SENSORS_ULTRA45) += ultra45_env.o
-obj-$(CONFIG_SENSORS_HDAPS) += hdaps.o
obj-$(CONFIG_SENSORS_I5K_AMB) += i5k_amb.o
obj-$(CONFIG_SENSORS_IBMAEM) += ibmaem.o
obj-$(CONFIG_SENSORS_IBMPEX) += ibmpex.o
+++ /dev/null
-/*
- * drivers/hwmon/hdaps.c - driver for IBM's Hard Drive Active Protection System
- *
- * Copyright (C) 2005 Robert Love <rml@novell.com>
- * Copyright (C) 2005 Jesper Juhl <jesper.juhl@gmail.com>
- *
- * The HardDisk Active Protection System (hdaps) is present in IBM ThinkPads
- * starting with the R40, T41, and X40. It provides a basic two-axis
- * accelerometer and other data, such as the device's temperature.
- *
- * This driver is based on the document by Mark A. Smith available at
- * http://www.almaden.ibm.com/cs/people/marksmith/tpaps.html and a lot of trial
- * and error.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License v2 as published by the
- * Free Software Foundation.
- *
- * 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/delay.h>
-#include <linux/platform_device.h>
-#include <linux/input-polldev.h>
-#include <linux/kernel.h>
-#include <linux/mutex.h>
-#include <linux/module.h>
-#include <linux/timer.h>
-#include <linux/dmi.h>
-#include <linux/jiffies.h>
-#include <linux/io.h>
-
-#define HDAPS_LOW_PORT 0x1600 /* first port used by hdaps */
-#define HDAPS_NR_PORTS 0x30 /* number of ports: 0x1600 - 0x162f */
-
-#define HDAPS_PORT_STATE 0x1611 /* device state */
-#define HDAPS_PORT_YPOS 0x1612 /* y-axis position */
-#define HDAPS_PORT_XPOS 0x1614 /* x-axis position */
-#define HDAPS_PORT_TEMP1 0x1616 /* device temperature, in Celsius */
-#define HDAPS_PORT_YVAR 0x1617 /* y-axis variance (what is this?) */
-#define HDAPS_PORT_XVAR 0x1619 /* x-axis variance (what is this?) */
-#define HDAPS_PORT_TEMP2 0x161b /* device temperature (again?) */
-#define HDAPS_PORT_UNKNOWN 0x161c /* what is this? */
-#define HDAPS_PORT_KMACT 0x161d /* keyboard or mouse activity */
-
-#define STATE_FRESH 0x50 /* accelerometer data is fresh */
-
-#define KEYBD_MASK 0x20 /* set if keyboard activity */
-#define MOUSE_MASK 0x40 /* set if mouse activity */
-#define KEYBD_ISSET(n) (!! (n & KEYBD_MASK)) /* keyboard used? */
-#define MOUSE_ISSET(n) (!! (n & MOUSE_MASK)) /* mouse used? */
-
-#define INIT_TIMEOUT_MSECS 4000 /* wait up to 4s for device init ... */
-#define INIT_WAIT_MSECS 200 /* ... in 200ms increments */
-
-#define HDAPS_POLL_INTERVAL 50 /* poll for input every 1/20s (50 ms)*/
-#define HDAPS_INPUT_FUZZ 4 /* input event threshold */
-#define HDAPS_INPUT_FLAT 4
-
-#define HDAPS_X_AXIS (1 << 0)
-#define HDAPS_Y_AXIS (1 << 1)
-#define HDAPS_BOTH_AXES (HDAPS_X_AXIS | HDAPS_Y_AXIS)
-
-static struct platform_device *pdev;
-static struct input_polled_dev *hdaps_idev;
-static unsigned int hdaps_invert;
-static u8 km_activity;
-static int rest_x;
-static int rest_y;
-
-static DEFINE_MUTEX(hdaps_mtx);
-
-/*
- * __get_latch - Get the value from a given port. Callers must hold hdaps_mtx.
- */
-static inline u8 __get_latch(u16 port)
-{
- return inb(port) & 0xff;
-}
-
-/*
- * __check_latch - Check a port latch for a given value. Returns zero if the
- * port contains the given value. Callers must hold hdaps_mtx.
- */
-static inline int __check_latch(u16 port, u8 val)
-{
- if (__get_latch(port) == val)
- return 0;
- return -EINVAL;
-}
-
-/*
- * __wait_latch - Wait up to 100us for a port latch to get a certain value,
- * returning zero if the value is obtained. Callers must hold hdaps_mtx.
- */
-static int __wait_latch(u16 port, u8 val)
-{
- unsigned int i;
-
- for (i = 0; i < 20; i++) {
- if (!__check_latch(port, val))
- return 0;
- udelay(5);
- }
-
- return -EIO;
-}
-
-/*
- * __device_refresh - request a refresh from the accelerometer. Does not wait
- * for refresh to complete. Callers must hold hdaps_mtx.
- */
-static void __device_refresh(void)
-{
- udelay(200);
- if (inb(0x1604) != STATE_FRESH) {
- outb(0x11, 0x1610);
- outb(0x01, 0x161f);
- }
-}
-
-/*
- * __device_refresh_sync - request a synchronous refresh from the
- * accelerometer. We wait for the refresh to complete. Returns zero if
- * successful and nonzero on error. Callers must hold hdaps_mtx.
- */
-static int __device_refresh_sync(void)
-{
- __device_refresh();
- return __wait_latch(0x1604, STATE_FRESH);
-}
-
-/*
- * __device_complete - indicate to the accelerometer that we are done reading
- * data, and then initiate an async refresh. Callers must hold hdaps_mtx.
- */
-static inline void __device_complete(void)
-{
- inb(0x161f);
- inb(0x1604);
- __device_refresh();
-}
-
-/*
- * hdaps_readb_one - reads a byte from a single I/O port, placing the value in
- * the given pointer. Returns zero on success or a negative error on failure.
- * Can sleep.
- */
-static int hdaps_readb_one(unsigned int port, u8 *val)
-{
- int ret;
-
- mutex_lock(&hdaps_mtx);
-
- /* do a sync refresh -- we need to be sure that we read fresh data */
- ret = __device_refresh_sync();
- if (ret)
- goto out;
-
- *val = inb(port);
- __device_complete();
-
-out:
- mutex_unlock(&hdaps_mtx);
- return ret;
-}
-
-/* __hdaps_read_pair - internal lockless helper for hdaps_read_pair(). */
-static int __hdaps_read_pair(unsigned int port1, unsigned int port2,
- int *x, int *y)
-{
- /* do a sync refresh -- we need to be sure that we read fresh data */
- if (__device_refresh_sync())
- return -EIO;
-
- *y = inw(port2);
- *x = inw(port1);
- km_activity = inb(HDAPS_PORT_KMACT);
- __device_complete();
-
- /* hdaps_invert is a bitvector to negate the axes */
- if (hdaps_invert & HDAPS_X_AXIS)
- *x = -*x;
- if (hdaps_invert & HDAPS_Y_AXIS)
- *y = -*y;
-
- return 0;
-}
-
-/*
- * hdaps_read_pair - reads the values from a pair of ports, placing the values
- * in the given pointers. Returns zero on success. Can sleep.
- */
-static int hdaps_read_pair(unsigned int port1, unsigned int port2,
- int *val1, int *val2)
-{
- int ret;
-
- mutex_lock(&hdaps_mtx);
- ret = __hdaps_read_pair(port1, port2, val1, val2);
- mutex_unlock(&hdaps_mtx);
-
- return ret;
-}
-
-/*
- * hdaps_device_init - initialize the accelerometer. Returns zero on success
- * and negative error code on failure. Can sleep.
- */
-static int hdaps_device_init(void)
-{
- int total, ret = -ENXIO;
-
- mutex_lock(&hdaps_mtx);
-
- outb(0x13, 0x1610);
- outb(0x01, 0x161f);
- if (__wait_latch(0x161f, 0x00))
- goto out;
-
- /*
- * Most ThinkPads return 0x01.
- *
- * Others--namely the R50p, T41p, and T42p--return 0x03. These laptops
- * have "inverted" axises.
- *
- * The 0x02 value occurs when the chip has been previously initialized.
- */
- if (__check_latch(0x1611, 0x03) &&
- __check_latch(0x1611, 0x02) &&
- __check_latch(0x1611, 0x01))
- goto out;
-
- printk(KERN_DEBUG "hdaps: initial latch check good (0x%02x).\n",
- __get_latch(0x1611));
-
- outb(0x17, 0x1610);
- outb(0x81, 0x1611);
- outb(0x01, 0x161f);
- if (__wait_latch(0x161f, 0x00))
- goto out;
- if (__wait_latch(0x1611, 0x00))
- goto out;
- if (__wait_latch(0x1612, 0x60))
- goto out;
- if (__wait_latch(0x1613, 0x00))
- goto out;
- outb(0x14, 0x1610);
- outb(0x01, 0x1611);
- outb(0x01, 0x161f);
- if (__wait_latch(0x161f, 0x00))
- goto out;
- outb(0x10, 0x1610);
- outb(0xc8, 0x1611);
- outb(0x00, 0x1612);
- outb(0x02, 0x1613);
- outb(0x01, 0x161f);
- if (__wait_latch(0x161f, 0x00))
- goto out;
- if (__device_refresh_sync())
- goto out;
- if (__wait_latch(0x1611, 0x00))
- goto out;
-
- /* we have done our dance, now let's wait for the applause */
- for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) {
- int x, y;
-
- /* a read of the device helps push it into action */
- __hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y);
- if (!__wait_latch(0x1611, 0x02)) {
- ret = 0;
- break;
- }
-
- msleep(INIT_WAIT_MSECS);
- }
-
-out:
- mutex_unlock(&hdaps_mtx);
- return ret;
-}
-
-
-/* Device model stuff */
-
-static int hdaps_probe(struct platform_device *dev)
-{
- int ret;
-
- ret = hdaps_device_init();
- if (ret)
- return ret;
-
- printk(KERN_INFO "hdaps: device successfully initialized.\n");
- return 0;
-}
-
-static int hdaps_resume(struct platform_device *dev)
-{
- return hdaps_device_init();
-}
-
-static struct platform_driver hdaps_driver = {
- .probe = hdaps_probe,
- .resume = hdaps_resume,
- .driver = {
- .name = "hdaps",
- .owner = THIS_MODULE,
- },
-};
-
-/*
- * hdaps_calibrate - Set our "resting" values. Callers must hold hdaps_mtx.
- */
-static void hdaps_calibrate(void)
-{
- __hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &rest_x, &rest_y);
-}
-
-static void hdaps_mousedev_poll(struct input_polled_dev *dev)
-{
- struct input_dev *input_dev = dev->input;
- int x, y;
-
- mutex_lock(&hdaps_mtx);
-
- if (__hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y))
- goto out;
-
- input_report_abs(input_dev, ABS_X, x - rest_x);
- input_report_abs(input_dev, ABS_Y, y - rest_y);
- input_sync(input_dev);
-
-out:
- mutex_unlock(&hdaps_mtx);
-}
-
-
-/* Sysfs Files */
-
-static ssize_t hdaps_position_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- int ret, x, y;
-
- ret = hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y);
- if (ret)
- return ret;
-
- return sprintf(buf, "(%d,%d)\n", x, y);
-}
-
-static ssize_t hdaps_variance_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- int ret, x, y;
-
- ret = hdaps_read_pair(HDAPS_PORT_XVAR, HDAPS_PORT_YVAR, &x, &y);
- if (ret)
- return ret;
-
- return sprintf(buf, "(%d,%d)\n", x, y);
-}
-
-static ssize_t hdaps_temp1_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- u8 temp;
- int ret;
-
- ret = hdaps_readb_one(HDAPS_PORT_TEMP1, &temp);
- if (ret < 0)
- return ret;
-
- return sprintf(buf, "%u\n", temp);
-}
-
-static ssize_t hdaps_temp2_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- u8 temp;
- int ret;
-
- ret = hdaps_readb_one(HDAPS_PORT_TEMP2, &temp);
- if (ret < 0)
- return ret;
-
- return sprintf(buf, "%u\n", temp);
-}
-
-static ssize_t hdaps_keyboard_activity_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- return sprintf(buf, "%u\n", KEYBD_ISSET(km_activity));
-}
-
-static ssize_t hdaps_mouse_activity_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- return sprintf(buf, "%u\n", MOUSE_ISSET(km_activity));
-}
-
-static ssize_t hdaps_calibrate_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return sprintf(buf, "(%d,%d)\n", rest_x, rest_y);
-}
-
-static ssize_t hdaps_calibrate_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- mutex_lock(&hdaps_mtx);
- hdaps_calibrate();
- mutex_unlock(&hdaps_mtx);
-
- return count;
-}
-
-static ssize_t hdaps_invert_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return sprintf(buf, "%u\n", hdaps_invert);
-}
-
-static ssize_t hdaps_invert_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- int invert;
-
- if (sscanf(buf, "%d", &invert) != 1 ||
- invert < 0 || invert > HDAPS_BOTH_AXES)
- return -EINVAL;
-
- hdaps_invert = invert;
- hdaps_calibrate();
-
- return count;
-}
-
-static DEVICE_ATTR(position, 0444, hdaps_position_show, NULL);
-static DEVICE_ATTR(variance, 0444, hdaps_variance_show, NULL);
-static DEVICE_ATTR(temp1, 0444, hdaps_temp1_show, NULL);
-static DEVICE_ATTR(temp2, 0444, hdaps_temp2_show, NULL);
-static DEVICE_ATTR(keyboard_activity, 0444, hdaps_keyboard_activity_show, NULL);
-static DEVICE_ATTR(mouse_activity, 0444, hdaps_mouse_activity_show, NULL);
-static DEVICE_ATTR(calibrate, 0644, hdaps_calibrate_show,hdaps_calibrate_store);
-static DEVICE_ATTR(invert, 0644, hdaps_invert_show, hdaps_invert_store);
-
-static struct attribute *hdaps_attributes[] = {
- &dev_attr_position.attr,
- &dev_attr_variance.attr,
- &dev_attr_temp1.attr,
- &dev_attr_temp2.attr,
- &dev_attr_keyboard_activity.attr,
- &dev_attr_mouse_activity.attr,
- &dev_attr_calibrate.attr,
- &dev_attr_invert.attr,
- NULL,
-};
-
-static struct attribute_group hdaps_attribute_group = {
- .attrs = hdaps_attributes,
-};
-
-
-/* Module stuff */
-
-/* hdaps_dmi_match - found a match. return one, short-circuiting the hunt. */
-static int __init hdaps_dmi_match(const struct dmi_system_id *id)
-{
- printk(KERN_INFO "hdaps: %s detected.\n", id->ident);
- return 1;
-}
-
-/* hdaps_dmi_match_invert - found an inverted match. */
-static int __init hdaps_dmi_match_invert(const struct dmi_system_id *id)
-{
- hdaps_invert = (unsigned long)id->driver_data;
- printk(KERN_INFO "hdaps: inverting axis (%u) readings.\n",
- hdaps_invert);
- return hdaps_dmi_match(id);
-}
-
-#define HDAPS_DMI_MATCH_INVERT(vendor, model, axes) { \
- .ident = vendor " " model, \
- .callback = hdaps_dmi_match_invert, \
- .driver_data = (void *)axes, \
- .matches = { \
- DMI_MATCH(DMI_BOARD_VENDOR, vendor), \
- DMI_MATCH(DMI_PRODUCT_VERSION, model) \
- } \
-}
-
-#define HDAPS_DMI_MATCH_NORMAL(vendor, model) \
- HDAPS_DMI_MATCH_INVERT(vendor, model, 0)
-
-/* Note that HDAPS_DMI_MATCH_NORMAL("ThinkPad T42") would match
- "ThinkPad T42p", so the order of the entries matters.
- If your ThinkPad is not recognized, please update to latest
- BIOS. This is especially the case for some R52 ThinkPads. */
-static struct dmi_system_id __initdata hdaps_whitelist[] = {
- HDAPS_DMI_MATCH_INVERT("IBM", "ThinkPad R50p", HDAPS_BOTH_AXES),
- HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad R50"),
- HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad R51"),
- HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad R52"),
- HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad R61i", HDAPS_BOTH_AXES),
- HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad R61", HDAPS_BOTH_AXES),
- HDAPS_DMI_MATCH_INVERT("IBM", "ThinkPad T41p", HDAPS_BOTH_AXES),
- HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad T41"),
- HDAPS_DMI_MATCH_INVERT("IBM", "ThinkPad T42p", HDAPS_BOTH_AXES),
- HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad T42"),
- HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad T43"),
- HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad T400", HDAPS_BOTH_AXES),
- HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad T60", HDAPS_BOTH_AXES),
- HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad T61p", HDAPS_BOTH_AXES),
- HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad T61", HDAPS_BOTH_AXES),
- HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad X40"),
- HDAPS_DMI_MATCH_INVERT("IBM", "ThinkPad X41", HDAPS_Y_AXIS),
- HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad X60", HDAPS_BOTH_AXES),
- HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad X61s", HDAPS_BOTH_AXES),
- HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad X61", HDAPS_BOTH_AXES),
- HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad Z60m"),
- HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad Z61m", HDAPS_BOTH_AXES),
- HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad Z61p", HDAPS_BOTH_AXES),
- { .ident = NULL }
-};
-
-static int __init hdaps_init(void)
-{
- struct input_dev *idev;
- int ret;
-
- if (!dmi_check_system(hdaps_whitelist)) {
- printk(KERN_WARNING "hdaps: supported laptop not found!\n");
- ret = -ENODEV;
- goto out;
- }
-
- if (!request_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS, "hdaps")) {
- ret = -ENXIO;
- goto out;
- }
-
- ret = platform_driver_register(&hdaps_driver);
- if (ret)
- goto out_region;
-
- pdev = platform_device_register_simple("hdaps", -1, NULL, 0);
- if (IS_ERR(pdev)) {
- ret = PTR_ERR(pdev);
- goto out_driver;
- }
-
- ret = sysfs_create_group(&pdev->dev.kobj, &hdaps_attribute_group);
- if (ret)
- goto out_device;
-
- hdaps_idev = input_allocate_polled_device();
- if (!hdaps_idev) {
- ret = -ENOMEM;
- goto out_group;
- }
-
- hdaps_idev->poll = hdaps_mousedev_poll;
- hdaps_idev->poll_interval = HDAPS_POLL_INTERVAL;
-
- /* initial calibrate for the input device */
- hdaps_calibrate();
-
- /* initialize the input class */
- idev = hdaps_idev->input;
- idev->name = "hdaps";
- idev->phys = "isa1600/input0";
- idev->id.bustype = BUS_ISA;
- idev->dev.parent = &pdev->dev;
- idev->evbit[0] = BIT_MASK(EV_ABS);
- input_set_abs_params(idev, ABS_X,
- -256, 256, HDAPS_INPUT_FUZZ, HDAPS_INPUT_FLAT);
- input_set_abs_params(idev, ABS_Y,
- -256, 256, HDAPS_INPUT_FUZZ, HDAPS_INPUT_FLAT);
-
- ret = input_register_polled_device(hdaps_idev);
- if (ret)
- goto out_idev;
-
- printk(KERN_INFO "hdaps: driver successfully loaded.\n");
- return 0;
-
-out_idev:
- input_free_polled_device(hdaps_idev);
-out_group:
- sysfs_remove_group(&pdev->dev.kobj, &hdaps_attribute_group);
-out_device:
- platform_device_unregister(pdev);
-out_driver:
- platform_driver_unregister(&hdaps_driver);
-out_region:
- release_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS);
-out:
- printk(KERN_WARNING "hdaps: driver init failed (ret=%d)!\n", ret);
- return ret;
-}
-
-static void __exit hdaps_exit(void)
-{
- input_unregister_polled_device(hdaps_idev);
- input_free_polled_device(hdaps_idev);
- sysfs_remove_group(&pdev->dev.kobj, &hdaps_attribute_group);
- platform_device_unregister(pdev);
- platform_driver_unregister(&hdaps_driver);
- release_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS);
-
- printk(KERN_INFO "hdaps: driver unloaded.\n");
-}
-
-module_init(hdaps_init);
-module_exit(hdaps_exit);
-
-module_param_named(invert, hdaps_invert, int, 0);
-MODULE_PARM_DESC(invert, "invert data along each axis. 1 invert x-axis, "
- "2 invert y-axis, 3 invert both axes.");
-
-MODULE_AUTHOR("Robert Love");
-MODULE_DESCRIPTION("IBM Hard Drive Active Protection System (HDAPS) driver");
-MODULE_LICENSE("GPL v2");
If you are not sure, say Y here. The driver enables polling only if
it is strictly necessary to do so.
+config SENSORS_HDAPS
+ tristate "Thinkpad Hard Drive Active Protection System (hdaps)"
+ depends on INPUT && X86
+ select INPUT_POLLDEV
+ default n
+ help
+ This driver provides support for the IBM Hard Drive Active Protection
+ System (hdaps), which provides an accelerometer and other misc. data.
+ ThinkPads starting with the R50, T41, and X40 are supported. The
+ accelerometer data is readable via sysfs.
+
+ This driver also provides an absolute input class device, allowing
+ the laptop to act as a pinball machine-esque joystick.
+
+ If your ThinkPad is not recognized by the driver, please update to latest
+ BIOS. This is especially the case for some R52 ThinkPads.
+
+ Say Y here if you have an applicable laptop and want to experience
+ the awesome power of hdaps.
+
config INTEL_MENLOW
tristate "Thermal Management driver for Intel menlow platform"
depends on ACPI_THERMAL
obj-$(CONFIG_SONY_LAPTOP) += sony-laptop.o
obj-$(CONFIG_IDEAPAD_LAPTOP) += ideapad-laptop.o
obj-$(CONFIG_THINKPAD_ACPI) += thinkpad_acpi.o
+obj-$(CONFIG_SENSORS_HDAPS) += hdaps.o
obj-$(CONFIG_FUJITSU_LAPTOP) += fujitsu-laptop.o
obj-$(CONFIG_PANASONIC_LAPTOP) += panasonic-laptop.o
obj-$(CONFIG_INTEL_MENLOW) += intel_menlow.o
--- /dev/null
+/*
+ * hdaps.c - driver for IBM's Hard Drive Active Protection System
+ *
+ * Copyright (C) 2005 Robert Love <rml@novell.com>
+ * Copyright (C) 2005 Jesper Juhl <jesper.juhl@gmail.com>
+ *
+ * The HardDisk Active Protection System (hdaps) is present in IBM ThinkPads
+ * starting with the R40, T41, and X40. It provides a basic two-axis
+ * accelerometer and other data, such as the device's temperature.
+ *
+ * This driver is based on the document by Mark A. Smith available at
+ * http://www.almaden.ibm.com/cs/people/marksmith/tpaps.html and a lot of trial
+ * and error.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License v2 as published by the
+ * Free Software Foundation.
+ *
+ * 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/delay.h>
+#include <linux/platform_device.h>
+#include <linux/input-polldev.h>
+#include <linux/kernel.h>
+#include <linux/mutex.h>
+#include <linux/module.h>
+#include <linux/timer.h>
+#include <linux/dmi.h>
+#include <linux/jiffies.h>
+#include <linux/io.h>
+
+#define HDAPS_LOW_PORT 0x1600 /* first port used by hdaps */
+#define HDAPS_NR_PORTS 0x30 /* number of ports: 0x1600 - 0x162f */
+
+#define HDAPS_PORT_STATE 0x1611 /* device state */
+#define HDAPS_PORT_YPOS 0x1612 /* y-axis position */
+#define HDAPS_PORT_XPOS 0x1614 /* x-axis position */
+#define HDAPS_PORT_TEMP1 0x1616 /* device temperature, in Celsius */
+#define HDAPS_PORT_YVAR 0x1617 /* y-axis variance (what is this?) */
+#define HDAPS_PORT_XVAR 0x1619 /* x-axis variance (what is this?) */
+#define HDAPS_PORT_TEMP2 0x161b /* device temperature (again?) */
+#define HDAPS_PORT_UNKNOWN 0x161c /* what is this? */
+#define HDAPS_PORT_KMACT 0x161d /* keyboard or mouse activity */
+
+#define STATE_FRESH 0x50 /* accelerometer data is fresh */
+
+#define KEYBD_MASK 0x20 /* set if keyboard activity */
+#define MOUSE_MASK 0x40 /* set if mouse activity */
+#define KEYBD_ISSET(n) (!! (n & KEYBD_MASK)) /* keyboard used? */
+#define MOUSE_ISSET(n) (!! (n & MOUSE_MASK)) /* mouse used? */
+
+#define INIT_TIMEOUT_MSECS 4000 /* wait up to 4s for device init ... */
+#define INIT_WAIT_MSECS 200 /* ... in 200ms increments */
+
+#define HDAPS_POLL_INTERVAL 50 /* poll for input every 1/20s (50 ms)*/
+#define HDAPS_INPUT_FUZZ 4 /* input event threshold */
+#define HDAPS_INPUT_FLAT 4
+
+#define HDAPS_X_AXIS (1 << 0)
+#define HDAPS_Y_AXIS (1 << 1)
+#define HDAPS_BOTH_AXES (HDAPS_X_AXIS | HDAPS_Y_AXIS)
+
+static struct platform_device *pdev;
+static struct input_polled_dev *hdaps_idev;
+static unsigned int hdaps_invert;
+static u8 km_activity;
+static int rest_x;
+static int rest_y;
+
+static DEFINE_MUTEX(hdaps_mtx);
+
+/*
+ * __get_latch - Get the value from a given port. Callers must hold hdaps_mtx.
+ */
+static inline u8 __get_latch(u16 port)
+{
+ return inb(port) & 0xff;
+}
+
+/*
+ * __check_latch - Check a port latch for a given value. Returns zero if the
+ * port contains the given value. Callers must hold hdaps_mtx.
+ */
+static inline int __check_latch(u16 port, u8 val)
+{
+ if (__get_latch(port) == val)
+ return 0;
+ return -EINVAL;
+}
+
+/*
+ * __wait_latch - Wait up to 100us for a port latch to get a certain value,
+ * returning zero if the value is obtained. Callers must hold hdaps_mtx.
+ */
+static int __wait_latch(u16 port, u8 val)
+{
+ unsigned int i;
+
+ for (i = 0; i < 20; i++) {
+ if (!__check_latch(port, val))
+ return 0;
+ udelay(5);
+ }
+
+ return -EIO;
+}
+
+/*
+ * __device_refresh - request a refresh from the accelerometer. Does not wait
+ * for refresh to complete. Callers must hold hdaps_mtx.
+ */
+static void __device_refresh(void)
+{
+ udelay(200);
+ if (inb(0x1604) != STATE_FRESH) {
+ outb(0x11, 0x1610);
+ outb(0x01, 0x161f);
+ }
+}
+
+/*
+ * __device_refresh_sync - request a synchronous refresh from the
+ * accelerometer. We wait for the refresh to complete. Returns zero if
+ * successful and nonzero on error. Callers must hold hdaps_mtx.
+ */
+static int __device_refresh_sync(void)
+{
+ __device_refresh();
+ return __wait_latch(0x1604, STATE_FRESH);
+}
+
+/*
+ * __device_complete - indicate to the accelerometer that we are done reading
+ * data, and then initiate an async refresh. Callers must hold hdaps_mtx.
+ */
+static inline void __device_complete(void)
+{
+ inb(0x161f);
+ inb(0x1604);
+ __device_refresh();
+}
+
+/*
+ * hdaps_readb_one - reads a byte from a single I/O port, placing the value in
+ * the given pointer. Returns zero on success or a negative error on failure.
+ * Can sleep.
+ */
+static int hdaps_readb_one(unsigned int port, u8 *val)
+{
+ int ret;
+
+ mutex_lock(&hdaps_mtx);
+
+ /* do a sync refresh -- we need to be sure that we read fresh data */
+ ret = __device_refresh_sync();
+ if (ret)
+ goto out;
+
+ *val = inb(port);
+ __device_complete();
+
+out:
+ mutex_unlock(&hdaps_mtx);
+ return ret;
+}
+
+/* __hdaps_read_pair - internal lockless helper for hdaps_read_pair(). */
+static int __hdaps_read_pair(unsigned int port1, unsigned int port2,
+ int *x, int *y)
+{
+ /* do a sync refresh -- we need to be sure that we read fresh data */
+ if (__device_refresh_sync())
+ return -EIO;
+
+ *y = inw(port2);
+ *x = inw(port1);
+ km_activity = inb(HDAPS_PORT_KMACT);
+ __device_complete();
+
+ /* hdaps_invert is a bitvector to negate the axes */
+ if (hdaps_invert & HDAPS_X_AXIS)
+ *x = -*x;
+ if (hdaps_invert & HDAPS_Y_AXIS)
+ *y = -*y;
+
+ return 0;
+}
+
+/*
+ * hdaps_read_pair - reads the values from a pair of ports, placing the values
+ * in the given pointers. Returns zero on success. Can sleep.
+ */
+static int hdaps_read_pair(unsigned int port1, unsigned int port2,
+ int *val1, int *val2)
+{
+ int ret;
+
+ mutex_lock(&hdaps_mtx);
+ ret = __hdaps_read_pair(port1, port2, val1, val2);
+ mutex_unlock(&hdaps_mtx);
+
+ return ret;
+}
+
+/*
+ * hdaps_device_init - initialize the accelerometer. Returns zero on success
+ * and negative error code on failure. Can sleep.
+ */
+static int hdaps_device_init(void)
+{
+ int total, ret = -ENXIO;
+
+ mutex_lock(&hdaps_mtx);
+
+ outb(0x13, 0x1610);
+ outb(0x01, 0x161f);
+ if (__wait_latch(0x161f, 0x00))
+ goto out;
+
+ /*
+ * Most ThinkPads return 0x01.
+ *
+ * Others--namely the R50p, T41p, and T42p--return 0x03. These laptops
+ * have "inverted" axises.
+ *
+ * The 0x02 value occurs when the chip has been previously initialized.
+ */
+ if (__check_latch(0x1611, 0x03) &&
+ __check_latch(0x1611, 0x02) &&
+ __check_latch(0x1611, 0x01))
+ goto out;
+
+ printk(KERN_DEBUG "hdaps: initial latch check good (0x%02x).\n",
+ __get_latch(0x1611));
+
+ outb(0x17, 0x1610);
+ outb(0x81, 0x1611);
+ outb(0x01, 0x161f);
+ if (__wait_latch(0x161f, 0x00))
+ goto out;
+ if (__wait_latch(0x1611, 0x00))
+ goto out;
+ if (__wait_latch(0x1612, 0x60))
+ goto out;
+ if (__wait_latch(0x1613, 0x00))
+ goto out;
+ outb(0x14, 0x1610);
+ outb(0x01, 0x1611);
+ outb(0x01, 0x161f);
+ if (__wait_latch(0x161f, 0x00))
+ goto out;
+ outb(0x10, 0x1610);
+ outb(0xc8, 0x1611);
+ outb(0x00, 0x1612);
+ outb(0x02, 0x1613);
+ outb(0x01, 0x161f);
+ if (__wait_latch(0x161f, 0x00))
+ goto out;
+ if (__device_refresh_sync())
+ goto out;
+ if (__wait_latch(0x1611, 0x00))
+ goto out;
+
+ /* we have done our dance, now let's wait for the applause */
+ for (total = INIT_TIMEOUT_MSECS; total > 0; total -= INIT_WAIT_MSECS) {
+ int x, y;
+
+ /* a read of the device helps push it into action */
+ __hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y);
+ if (!__wait_latch(0x1611, 0x02)) {
+ ret = 0;
+ break;
+ }
+
+ msleep(INIT_WAIT_MSECS);
+ }
+
+out:
+ mutex_unlock(&hdaps_mtx);
+ return ret;
+}
+
+
+/* Device model stuff */
+
+static int hdaps_probe(struct platform_device *dev)
+{
+ int ret;
+
+ ret = hdaps_device_init();
+ if (ret)
+ return ret;
+
+ printk(KERN_INFO "hdaps: device successfully initialized.\n");
+ return 0;
+}
+
+static int hdaps_resume(struct platform_device *dev)
+{
+ return hdaps_device_init();
+}
+
+static struct platform_driver hdaps_driver = {
+ .probe = hdaps_probe,
+ .resume = hdaps_resume,
+ .driver = {
+ .name = "hdaps",
+ .owner = THIS_MODULE,
+ },
+};
+
+/*
+ * hdaps_calibrate - Set our "resting" values. Callers must hold hdaps_mtx.
+ */
+static void hdaps_calibrate(void)
+{
+ __hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &rest_x, &rest_y);
+}
+
+static void hdaps_mousedev_poll(struct input_polled_dev *dev)
+{
+ struct input_dev *input_dev = dev->input;
+ int x, y;
+
+ mutex_lock(&hdaps_mtx);
+
+ if (__hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y))
+ goto out;
+
+ input_report_abs(input_dev, ABS_X, x - rest_x);
+ input_report_abs(input_dev, ABS_Y, y - rest_y);
+ input_sync(input_dev);
+
+out:
+ mutex_unlock(&hdaps_mtx);
+}
+
+
+/* Sysfs Files */
+
+static ssize_t hdaps_position_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int ret, x, y;
+
+ ret = hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "(%d,%d)\n", x, y);
+}
+
+static ssize_t hdaps_variance_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int ret, x, y;
+
+ ret = hdaps_read_pair(HDAPS_PORT_XVAR, HDAPS_PORT_YVAR, &x, &y);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "(%d,%d)\n", x, y);
+}
+
+static ssize_t hdaps_temp1_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ u8 temp;
+ int ret;
+
+ ret = hdaps_readb_one(HDAPS_PORT_TEMP1, &temp);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%u\n", temp);
+}
+
+static ssize_t hdaps_temp2_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ u8 temp;
+ int ret;
+
+ ret = hdaps_readb_one(HDAPS_PORT_TEMP2, &temp);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%u\n", temp);
+}
+
+static ssize_t hdaps_keyboard_activity_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%u\n", KEYBD_ISSET(km_activity));
+}
+
+static ssize_t hdaps_mouse_activity_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%u\n", MOUSE_ISSET(km_activity));
+}
+
+static ssize_t hdaps_calibrate_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "(%d,%d)\n", rest_x, rest_y);
+}
+
+static ssize_t hdaps_calibrate_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ mutex_lock(&hdaps_mtx);
+ hdaps_calibrate();
+ mutex_unlock(&hdaps_mtx);
+
+ return count;
+}
+
+static ssize_t hdaps_invert_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%u\n", hdaps_invert);
+}
+
+static ssize_t hdaps_invert_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int invert;
+
+ if (sscanf(buf, "%d", &invert) != 1 ||
+ invert < 0 || invert > HDAPS_BOTH_AXES)
+ return -EINVAL;
+
+ hdaps_invert = invert;
+ hdaps_calibrate();
+
+ return count;
+}
+
+static DEVICE_ATTR(position, 0444, hdaps_position_show, NULL);
+static DEVICE_ATTR(variance, 0444, hdaps_variance_show, NULL);
+static DEVICE_ATTR(temp1, 0444, hdaps_temp1_show, NULL);
+static DEVICE_ATTR(temp2, 0444, hdaps_temp2_show, NULL);
+static DEVICE_ATTR(keyboard_activity, 0444, hdaps_keyboard_activity_show, NULL);
+static DEVICE_ATTR(mouse_activity, 0444, hdaps_mouse_activity_show, NULL);
+static DEVICE_ATTR(calibrate, 0644, hdaps_calibrate_show,hdaps_calibrate_store);
+static DEVICE_ATTR(invert, 0644, hdaps_invert_show, hdaps_invert_store);
+
+static struct attribute *hdaps_attributes[] = {
+ &dev_attr_position.attr,
+ &dev_attr_variance.attr,
+ &dev_attr_temp1.attr,
+ &dev_attr_temp2.attr,
+ &dev_attr_keyboard_activity.attr,
+ &dev_attr_mouse_activity.attr,
+ &dev_attr_calibrate.attr,
+ &dev_attr_invert.attr,
+ NULL,
+};
+
+static struct attribute_group hdaps_attribute_group = {
+ .attrs = hdaps_attributes,
+};
+
+
+/* Module stuff */
+
+/* hdaps_dmi_match - found a match. return one, short-circuiting the hunt. */
+static int __init hdaps_dmi_match(const struct dmi_system_id *id)
+{
+ printk(KERN_INFO "hdaps: %s detected.\n", id->ident);
+ return 1;
+}
+
+/* hdaps_dmi_match_invert - found an inverted match. */
+static int __init hdaps_dmi_match_invert(const struct dmi_system_id *id)
+{
+ hdaps_invert = (unsigned long)id->driver_data;
+ printk(KERN_INFO "hdaps: inverting axis (%u) readings.\n",
+ hdaps_invert);
+ return hdaps_dmi_match(id);
+}
+
+#define HDAPS_DMI_MATCH_INVERT(vendor, model, axes) { \
+ .ident = vendor " " model, \
+ .callback = hdaps_dmi_match_invert, \
+ .driver_data = (void *)axes, \
+ .matches = { \
+ DMI_MATCH(DMI_BOARD_VENDOR, vendor), \
+ DMI_MATCH(DMI_PRODUCT_VERSION, model) \
+ } \
+}
+
+#define HDAPS_DMI_MATCH_NORMAL(vendor, model) \
+ HDAPS_DMI_MATCH_INVERT(vendor, model, 0)
+
+/* Note that HDAPS_DMI_MATCH_NORMAL("ThinkPad T42") would match
+ "ThinkPad T42p", so the order of the entries matters.
+ If your ThinkPad is not recognized, please update to latest
+ BIOS. This is especially the case for some R52 ThinkPads. */
+static struct dmi_system_id __initdata hdaps_whitelist[] = {
+ HDAPS_DMI_MATCH_INVERT("IBM", "ThinkPad R50p", HDAPS_BOTH_AXES),
+ HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad R50"),
+ HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad R51"),
+ HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad R52"),
+ HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad R61i", HDAPS_BOTH_AXES),
+ HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad R61", HDAPS_BOTH_AXES),
+ HDAPS_DMI_MATCH_INVERT("IBM", "ThinkPad T41p", HDAPS_BOTH_AXES),
+ HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad T41"),
+ HDAPS_DMI_MATCH_INVERT("IBM", "ThinkPad T42p", HDAPS_BOTH_AXES),
+ HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad T42"),
+ HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad T43"),
+ HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad T400", HDAPS_BOTH_AXES),
+ HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad T60", HDAPS_BOTH_AXES),
+ HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad T61p", HDAPS_BOTH_AXES),
+ HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad T61", HDAPS_BOTH_AXES),
+ HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad X40"),
+ HDAPS_DMI_MATCH_INVERT("IBM", "ThinkPad X41", HDAPS_Y_AXIS),
+ HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad X60", HDAPS_BOTH_AXES),
+ HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad X61s", HDAPS_BOTH_AXES),
+ HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad X61", HDAPS_BOTH_AXES),
+ HDAPS_DMI_MATCH_NORMAL("IBM", "ThinkPad Z60m"),
+ HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad Z61m", HDAPS_BOTH_AXES),
+ HDAPS_DMI_MATCH_INVERT("LENOVO", "ThinkPad Z61p", HDAPS_BOTH_AXES),
+ { .ident = NULL }
+};
+
+static int __init hdaps_init(void)
+{
+ struct input_dev *idev;
+ int ret;
+
+ if (!dmi_check_system(hdaps_whitelist)) {
+ printk(KERN_WARNING "hdaps: supported laptop not found!\n");
+ ret = -ENODEV;
+ goto out;
+ }
+
+ if (!request_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS, "hdaps")) {
+ ret = -ENXIO;
+ goto out;
+ }
+
+ ret = platform_driver_register(&hdaps_driver);
+ if (ret)
+ goto out_region;
+
+ pdev = platform_device_register_simple("hdaps", -1, NULL, 0);
+ if (IS_ERR(pdev)) {
+ ret = PTR_ERR(pdev);
+ goto out_driver;
+ }
+
+ ret = sysfs_create_group(&pdev->dev.kobj, &hdaps_attribute_group);
+ if (ret)
+ goto out_device;
+
+ hdaps_idev = input_allocate_polled_device();
+ if (!hdaps_idev) {
+ ret = -ENOMEM;
+ goto out_group;
+ }
+
+ hdaps_idev->poll = hdaps_mousedev_poll;
+ hdaps_idev->poll_interval = HDAPS_POLL_INTERVAL;
+
+ /* initial calibrate for the input device */
+ hdaps_calibrate();
+
+ /* initialize the input class */
+ idev = hdaps_idev->input;
+ idev->name = "hdaps";
+ idev->phys = "isa1600/input0";
+ idev->id.bustype = BUS_ISA;
+ idev->dev.parent = &pdev->dev;
+ idev->evbit[0] = BIT_MASK(EV_ABS);
+ input_set_abs_params(idev, ABS_X,
+ -256, 256, HDAPS_INPUT_FUZZ, HDAPS_INPUT_FLAT);
+ input_set_abs_params(idev, ABS_Y,
+ -256, 256, HDAPS_INPUT_FUZZ, HDAPS_INPUT_FLAT);
+
+ ret = input_register_polled_device(hdaps_idev);
+ if (ret)
+ goto out_idev;
+
+ printk(KERN_INFO "hdaps: driver successfully loaded.\n");
+ return 0;
+
+out_idev:
+ input_free_polled_device(hdaps_idev);
+out_group:
+ sysfs_remove_group(&pdev->dev.kobj, &hdaps_attribute_group);
+out_device:
+ platform_device_unregister(pdev);
+out_driver:
+ platform_driver_unregister(&hdaps_driver);
+out_region:
+ release_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS);
+out:
+ printk(KERN_WARNING "hdaps: driver init failed (ret=%d)!\n", ret);
+ return ret;
+}
+
+static void __exit hdaps_exit(void)
+{
+ input_unregister_polled_device(hdaps_idev);
+ input_free_polled_device(hdaps_idev);
+ sysfs_remove_group(&pdev->dev.kobj, &hdaps_attribute_group);
+ platform_device_unregister(pdev);
+ platform_driver_unregister(&hdaps_driver);
+ release_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS);
+
+ printk(KERN_INFO "hdaps: driver unloaded.\n");
+}
+
+module_init(hdaps_init);
+module_exit(hdaps_exit);
+
+module_param_named(invert, hdaps_invert, int, 0);
+MODULE_PARM_DESC(invert, "invert data along each axis. 1 invert x-axis, "
+ "2 invert y-axis, 3 invert both axes.");
+
+MODULE_AUTHOR("Robert Love");
+MODULE_DESCRIPTION("IBM Hard Drive Active Protection System (HDAPS) driver");
+MODULE_LICENSE("GPL v2");
projects / cascardo / linux.git / commitdiff