* 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 the IBM ThinkPad
- * T41, T42, T43, R50, R50p, R51, and X40, at least. It provides a basic
- * two-axis accelerometer and other data, such as the device's temperature.
+ * 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
*/
#include <linux/delay.h>
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/kernel.h>
#include <linux/module.h>
#define HDAPS_POLL_PERIOD (HZ/20) /* poll for input every 1/20s */
#define HDAPS_INPUT_FUZZ 4 /* input event threshold */
+#define HDAPS_INPUT_FLAT 4
static struct timer_list hdaps_timer;
static struct platform_device *pdev;
+static struct input_dev *hdaps_idev;
static unsigned int hdaps_invert;
static u8 km_activity;
static int rest_x;
/* Device model stuff */
-static int hdaps_probe(struct device *dev)
+static int hdaps_probe(struct platform_device *dev)
{
int ret;
return 0;
}
-static int hdaps_resume(struct device *dev, u32 level)
+static int hdaps_resume(struct platform_device *dev)
{
- if (level == RESUME_ENABLE)
- return hdaps_device_init();
- return 0;
+ return hdaps_device_init();
}
-static struct device_driver hdaps_driver = {
- .name = "hdaps",
- .bus = &platform_bus_type,
- .owner = THIS_MODULE,
+static struct platform_driver hdaps_driver = {
.probe = hdaps_probe,
- .resume = hdaps_resume
-};
-
-/* Input class stuff */
-
-static struct input_dev hdaps_idev = {
- .name = "hdaps",
- .evbit = { BIT(EV_ABS) },
- .absbit = { BIT(ABS_X) | BIT(ABS_Y) },
- .absmin = { [ABS_X] = -256, [ABS_Y] = -256 },
- .absmax = { [ABS_X] = 256, [ABS_Y] = 256 },
- .absfuzz = { [ABS_X] = HDAPS_INPUT_FUZZ, [ABS_Y] = HDAPS_INPUT_FUZZ },
- .absflat = { [ABS_X] = HDAPS_INPUT_FUZZ, [ABS_Y] = HDAPS_INPUT_FUZZ },
+ .resume = hdaps_resume,
+ .driver = {
+ .name = "hdaps",
+ .owner = THIS_MODULE,
+ },
};
/*
if (__hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y))
goto out;
- input_report_abs(&hdaps_idev, ABS_X, x - rest_x);
- input_report_abs(&hdaps_idev, ABS_Y, y - rest_y);
- input_sync(&hdaps_idev);
+ input_report_abs(hdaps_idev, ABS_X, x - rest_x);
+ input_report_abs(hdaps_idev, ABS_Y, y - rest_y);
+ input_sync(hdaps_idev);
mod_timer(&hdaps_timer, jiffies + HDAPS_POLL_PERIOD);
/* Module stuff */
-/*
- * XXX: We should be able to return nonzero and halt the detection process.
- * But there is a bug in dmi_check_system() where a nonzero return from the
- * first match will result in a return of failure from dmi_check_system().
- * I fixed this; the patch is 2.6-git. Once in a released tree, we can make
- * hdaps_dmi_match_invert() return hdaps_dmi_match(), which in turn returns 1.
- */
+/* hdaps_dmi_match - found a match. return one, short-circuiting the hunt. */
static int hdaps_dmi_match(struct dmi_system_id *id)
{
printk(KERN_INFO "hdaps: %s detected.\n", id->ident);
- return 0;
+ return 1;
}
+/* hdaps_dmi_match_invert - found an inverted match. */
static int hdaps_dmi_match_invert(struct dmi_system_id *id)
{
hdaps_invert = 1;
printk(KERN_INFO "hdaps: inverting axis readings.\n");
- return 0;
+ return hdaps_dmi_match(id);
}
#define HDAPS_DMI_MATCH_NORMAL(model) { \
HDAPS_DMI_MATCH_INVERT("ThinkPad R50p"),
HDAPS_DMI_MATCH_NORMAL("ThinkPad R50"),
HDAPS_DMI_MATCH_NORMAL("ThinkPad R51"),
+ HDAPS_DMI_MATCH_NORMAL("ThinkPad R52"),
HDAPS_DMI_MATCH_INVERT("ThinkPad T41p"),
HDAPS_DMI_MATCH_NORMAL("ThinkPad T41"),
HDAPS_DMI_MATCH_INVERT("ThinkPad T42p"),
HDAPS_DMI_MATCH_NORMAL("ThinkPad T43"),
HDAPS_DMI_MATCH_NORMAL("ThinkPad X40"),
HDAPS_DMI_MATCH_NORMAL("ThinkPad X41 Tablet"),
+ HDAPS_DMI_MATCH_NORMAL("ThinkPad X41"),
{ .ident = NULL }
};
goto out;
}
- ret = driver_register(&hdaps_driver);
+ ret = platform_driver_register(&hdaps_driver);
if (ret)
goto out_region;
if (ret)
goto out_device;
+ hdaps_idev = input_allocate_device();
+ if (!hdaps_idev) {
+ ret = -ENOMEM;
+ goto out_group;
+ }
+
/* initial calibrate for the input device */
hdaps_calibrate();
/* initialize the input class */
- hdaps_idev.dev = &pdev->dev;
- input_register_device(&hdaps_idev);
+ hdaps_idev->name = "hdaps";
+ hdaps_idev->cdev.dev = &pdev->dev;
+ hdaps_idev->evbit[0] = BIT(EV_ABS);
+ input_set_abs_params(hdaps_idev, ABS_X,
+ -256, 256, HDAPS_INPUT_FUZZ, HDAPS_INPUT_FLAT);
+ input_set_abs_params(hdaps_idev, ABS_X,
+ -256, 256, HDAPS_INPUT_FUZZ, HDAPS_INPUT_FLAT);
+
+ input_register_device(hdaps_idev);
/* start up our timer for the input device */
init_timer(&hdaps_timer);
printk(KERN_INFO "hdaps: driver successfully loaded.\n");
return 0;
+out_group:
+ sysfs_remove_group(&pdev->dev.kobj, &hdaps_attribute_group);
out_device:
platform_device_unregister(pdev);
out_driver:
- driver_unregister(&hdaps_driver);
+ platform_driver_unregister(&hdaps_driver);
out_region:
release_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS);
out:
static void __exit hdaps_exit(void)
{
del_timer_sync(&hdaps_timer);
- input_unregister_device(&hdaps_idev);
+ input_unregister_device(hdaps_idev);
sysfs_remove_group(&pdev->dev.kobj, &hdaps_attribute_group);
platform_device_unregister(pdev);
- driver_unregister(&hdaps_driver);
+ platform_driver_unregister(&hdaps_driver);
release_region(HDAPS_LOW_PORT, HDAPS_NR_PORTS);
printk(KERN_INFO "hdaps: driver unloaded.\n");
projects / linux-2.6 / blobdiff