#include <linux/freezer.h>
#include <linux/uaccess.h>
#include <linux/miscdevice.h>
-#include <acpi/acpi_drivers.h>
#include <asm/atomic.h>
#include "lis3lv02d.h"
* joystick.
*/
-struct acpi_lis3lv02d adev = {
- .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(adev.misc_wait),
+struct lis3lv02d lis3_dev = {
+ .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait),
};
-EXPORT_SYMBOL_GPL(adev);
+EXPORT_SYMBOL_GPL(lis3_dev);
-static int lis3lv02d_add_fs(struct acpi_device *device);
+static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg)
+{
+ s8 lo;
+ if (lis3->read(lis3, reg, &lo) < 0)
+ return 0;
+
+ return lo;
+}
+
+static s16 lis3lv02d_read_16(struct lis3lv02d *lis3, int reg)
+{
+ u8 lo, hi;
+
+ lis3->read(lis3, reg - 1, &lo);
+ lis3->read(lis3, reg, &hi);
+ /* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */
+ return (s16)((hi << 8) | lo);
+}
/**
* lis3lv02d_get_axis - For the given axis, give the value converted
/**
* lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer
- * @handle: the handle to the device
- * @x: where to store the X axis value
- * @y: where to store the Y axis value
- * @z: where to store the Z axis value
+ * @lis3: pointer to the device struct
+ * @x: where to store the X axis value
+ * @y: where to store the Y axis value
+ * @z: where to store the Z axis value
*
* Note that 40Hz input device can eat up about 10% CPU at 800MHZ
*/
-static void lis3lv02d_get_xyz(acpi_handle handle, int *x, int *y, int *z)
+static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z)
{
int position[3];
- position[0] = adev.read_data(handle, OUTX);
- position[1] = adev.read_data(handle, OUTY);
- position[2] = adev.read_data(handle, OUTZ);
+ position[0] = lis3->read_data(lis3, OUTX);
+ position[1] = lis3->read_data(lis3, OUTY);
+ position[2] = lis3->read_data(lis3, OUTZ);
- *x = lis3lv02d_get_axis(adev.ac.x, position);
- *y = lis3lv02d_get_axis(adev.ac.y, position);
- *z = lis3lv02d_get_axis(adev.ac.z, position);
+ *x = lis3lv02d_get_axis(lis3->ac.x, position);
+ *y = lis3lv02d_get_axis(lis3->ac.y, position);
+ *z = lis3lv02d_get_axis(lis3->ac.z, position);
}
-void lis3lv02d_poweroff(acpi_handle handle)
+void lis3lv02d_poweroff(struct lis3lv02d *lis3)
{
- adev.is_on = 0;
+ /* disable X,Y,Z axis and power down */
+ lis3->write(lis3, CTRL_REG1, 0x00);
}
EXPORT_SYMBOL_GPL(lis3lv02d_poweroff);
-void lis3lv02d_poweron(acpi_handle handle)
+void lis3lv02d_poweron(struct lis3lv02d *lis3)
{
- adev.is_on = 1;
- adev.init(handle);
-}
-EXPORT_SYMBOL_GPL(lis3lv02d_poweron);
+ u8 reg;
-/*
- * To be called before starting to use the device. It makes sure that the
- * device will always be on until a call to lis3lv02d_decrease_use(). Not to be
- * used from interrupt context.
- */
-static void lis3lv02d_increase_use(struct acpi_lis3lv02d *dev)
-{
- mutex_lock(&dev->lock);
- dev->usage++;
- if (dev->usage == 1) {
- if (!dev->is_on)
- lis3lv02d_poweron(dev->device->handle);
- }
- mutex_unlock(&dev->lock);
-}
+ lis3->init(lis3);
-/*
- * To be called whenever a usage of the device is stopped.
- * It will make sure to turn off the device when there is not usage.
- */
-static void lis3lv02d_decrease_use(struct acpi_lis3lv02d *dev)
-{
- mutex_lock(&dev->lock);
- dev->usage--;
- if (dev->usage == 0)
- lis3lv02d_poweroff(dev->device->handle);
- mutex_unlock(&dev->lock);
+ /*
+ * Common configuration
+ * BDU: LSB and MSB values are not updated until both have been read.
+ * So the value read will always be correct.
+ */
+ lis3->read(lis3, CTRL_REG2, ®);
+ reg |= CTRL2_BDU;
+ lis3->write(lis3, CTRL_REG2, reg);
}
+EXPORT_SYMBOL_GPL(lis3lv02d_poweron);
+
static irqreturn_t lis302dl_interrupt(int irq, void *dummy)
{
* the lid is closed. This leads to interrupts as soon as a little move
* is done.
*/
- atomic_inc(&adev.count);
+ atomic_inc(&lis3_dev.count);
- wake_up_interruptible(&adev.misc_wait);
- kill_fasync(&adev.async_queue, SIGIO, POLL_IN);
+ wake_up_interruptible(&lis3_dev.misc_wait);
+ kill_fasync(&lis3_dev.async_queue, SIGIO, POLL_IN);
return IRQ_HANDLED;
}
{
int ret;
- if (test_and_set_bit(0, &adev.misc_opened))
+ if (test_and_set_bit(0, &lis3_dev.misc_opened))
return -EBUSY; /* already open */
- atomic_set(&adev.count, 0);
+ atomic_set(&lis3_dev.count, 0);
/*
* The sensor can generate interrupts for free-fall and direction
* io-apic is not configurable (and generates a warning) but I keep it
* in case of support for other hardware.
*/
- ret = request_irq(adev.irq, lis302dl_interrupt, IRQF_TRIGGER_RISING,
- DRIVER_NAME, &adev);
+ ret = request_irq(lis3_dev.irq, lis302dl_interrupt, IRQF_TRIGGER_RISING,
+ DRIVER_NAME, &lis3_dev);
if (ret) {
- clear_bit(0, &adev.misc_opened);
- printk(KERN_ERR DRIVER_NAME ": IRQ%d allocation failed\n", adev.irq);
+ clear_bit(0, &lis3_dev.misc_opened);
+ printk(KERN_ERR DRIVER_NAME ": IRQ%d allocation failed\n", lis3_dev.irq);
return -EBUSY;
}
- lis3lv02d_increase_use(&adev);
- printk("lis3: registered interrupt %d\n", adev.irq);
return 0;
}
static int lis3lv02d_misc_release(struct inode *inode, struct file *file)
{
- fasync_helper(-1, file, 0, &adev.async_queue);
- lis3lv02d_decrease_use(&adev);
- free_irq(adev.irq, &adev);
- clear_bit(0, &adev.misc_opened); /* release the device */
+ fasync_helper(-1, file, 0, &lis3_dev.async_queue);
+ free_irq(lis3_dev.irq, &lis3_dev);
+ clear_bit(0, &lis3_dev.misc_opened); /* release the device */
return 0;
}
if (count < 1)
return -EINVAL;
- add_wait_queue(&adev.misc_wait, &wait);
+ add_wait_queue(&lis3_dev.misc_wait, &wait);
while (true) {
set_current_state(TASK_INTERRUPTIBLE);
- data = atomic_xchg(&adev.count, 0);
+ data = atomic_xchg(&lis3_dev.count, 0);
if (data)
break;
out:
__set_current_state(TASK_RUNNING);
- remove_wait_queue(&adev.misc_wait, &wait);
+ remove_wait_queue(&lis3_dev.misc_wait, &wait);
return retval;
}
static unsigned int lis3lv02d_misc_poll(struct file *file, poll_table *wait)
{
- poll_wait(file, &adev.misc_wait, wait);
- if (atomic_read(&adev.count))
+ poll_wait(file, &lis3_dev.misc_wait, wait);
+ if (atomic_read(&lis3_dev.count))
return POLLIN | POLLRDNORM;
return 0;
}
static int lis3lv02d_misc_fasync(int fd, struct file *file, int on)
{
- return fasync_helper(fd, file, on, &adev.async_queue);
+ return fasync_helper(fd, file, on, &lis3_dev.async_queue);
}
static const struct file_operations lis3lv02d_misc_fops = {
int x, y, z;
while (!kthread_should_stop()) {
- lis3lv02d_get_xyz(adev.device->handle, &x, &y, &z);
- input_report_abs(adev.idev, ABS_X, x - adev.xcalib);
- input_report_abs(adev.idev, ABS_Y, y - adev.ycalib);
- input_report_abs(adev.idev, ABS_Z, z - adev.zcalib);
+ lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z);
+ input_report_abs(lis3_dev.idev, ABS_X, x - lis3_dev.xcalib);
+ input_report_abs(lis3_dev.idev, ABS_Y, y - lis3_dev.ycalib);
+ input_report_abs(lis3_dev.idev, ABS_Z, z - lis3_dev.zcalib);
- input_sync(adev.idev);
+ input_sync(lis3_dev.idev);
try_to_freeze();
msleep_interruptible(MDPS_POLL_INTERVAL);
static int lis3lv02d_joystick_open(struct input_dev *input)
{
- lis3lv02d_increase_use(&adev);
- adev.kthread = kthread_run(lis3lv02d_joystick_kthread, NULL, "klis3lv02d");
- if (IS_ERR(adev.kthread)) {
- lis3lv02d_decrease_use(&adev);
- return PTR_ERR(adev.kthread);
+ lis3_dev.kthread = kthread_run(lis3lv02d_joystick_kthread, NULL, "klis3lv02d");
+ if (IS_ERR(lis3_dev.kthread)) {
+ return PTR_ERR(lis3_dev.kthread);
}
return 0;
static void lis3lv02d_joystick_close(struct input_dev *input)
{
- kthread_stop(adev.kthread);
- lis3lv02d_decrease_use(&adev);
+ kthread_stop(lis3_dev.kthread);
}
static inline void lis3lv02d_calibrate_joystick(void)
{
- lis3lv02d_get_xyz(adev.device->handle, &adev.xcalib, &adev.ycalib, &adev.zcalib);
+ lis3lv02d_get_xyz(&lis3_dev,
+ &lis3_dev.xcalib, &lis3_dev.ycalib, &lis3_dev.zcalib);
}
int lis3lv02d_joystick_enable(void)
{
int err;
- if (adev.idev)
+ if (lis3_dev.idev)
return -EINVAL;
- adev.idev = input_allocate_device();
- if (!adev.idev)
+ lis3_dev.idev = input_allocate_device();
+ if (!lis3_dev.idev)
return -ENOMEM;
lis3lv02d_calibrate_joystick();
- adev.idev->name = "ST LIS3LV02DL Accelerometer";
- adev.idev->phys = DRIVER_NAME "/input0";
- adev.idev->id.bustype = BUS_HOST;
- adev.idev->id.vendor = 0;
- adev.idev->dev.parent = &adev.pdev->dev;
- adev.idev->open = lis3lv02d_joystick_open;
- adev.idev->close = lis3lv02d_joystick_close;
+ lis3_dev.idev->name = "ST LIS3LV02DL Accelerometer";
+ lis3_dev.idev->phys = DRIVER_NAME "/input0";
+ lis3_dev.idev->id.bustype = BUS_HOST;
+ lis3_dev.idev->id.vendor = 0;
+ lis3_dev.idev->dev.parent = &lis3_dev.pdev->dev;
+ lis3_dev.idev->open = lis3lv02d_joystick_open;
+ lis3_dev.idev->close = lis3lv02d_joystick_close;
- set_bit(EV_ABS, adev.idev->evbit);
- input_set_abs_params(adev.idev, ABS_X, -adev.mdps_max_val, adev.mdps_max_val, 3, 3);
- input_set_abs_params(adev.idev, ABS_Y, -adev.mdps_max_val, adev.mdps_max_val, 3, 3);
- input_set_abs_params(adev.idev, ABS_Z, -adev.mdps_max_val, adev.mdps_max_val, 3, 3);
+ set_bit(EV_ABS, lis3_dev.idev->evbit);
+ input_set_abs_params(lis3_dev.idev, ABS_X, -lis3_dev.mdps_max_val, lis3_dev.mdps_max_val, 3, 3);
+ input_set_abs_params(lis3_dev.idev, ABS_Y, -lis3_dev.mdps_max_val, lis3_dev.mdps_max_val, 3, 3);
+ input_set_abs_params(lis3_dev.idev, ABS_Z, -lis3_dev.mdps_max_val, lis3_dev.mdps_max_val, 3, 3);
- err = input_register_device(adev.idev);
+ err = input_register_device(lis3_dev.idev);
if (err) {
- input_free_device(adev.idev);
- adev.idev = NULL;
+ input_free_device(lis3_dev.idev);
+ lis3_dev.idev = NULL;
}
return err;
void lis3lv02d_joystick_disable(void)
{
- if (!adev.idev)
+ if (!lis3_dev.idev)
return;
- misc_deregister(&lis3lv02d_misc_device);
- input_unregister_device(adev.idev);
- adev.idev = NULL;
+ if (lis3_dev.irq)
+ misc_deregister(&lis3lv02d_misc_device);
+ input_unregister_device(lis3_dev.idev);
+ lis3_dev.idev = NULL;
}
EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable);
-/*
- * Initialise the accelerometer and the various subsystems.
- * Should be rather independant of the bus system.
- */
-int lis3lv02d_init_device(struct acpi_lis3lv02d *dev)
-{
- mutex_init(&dev->lock);
- lis3lv02d_add_fs(dev->device);
- lis3lv02d_increase_use(dev);
-
- if (lis3lv02d_joystick_enable())
- printk(KERN_ERR DRIVER_NAME ": joystick initialization failed\n");
-
- printk("lis3_init_device: irq %d\n", dev->irq);
-
- /* if we did not get an IRQ from ACPI - we have nothing more to do */
- if (!dev->irq) {
- printk(KERN_ERR DRIVER_NAME
- ": No IRQ in ACPI. Disabling /dev/freefall\n");
- goto out;
- }
-
- printk("lis3: registering device\n");
- if (misc_register(&lis3lv02d_misc_device))
- printk(KERN_ERR DRIVER_NAME ": misc_register failed\n");
-out:
- lis3lv02d_decrease_use(dev);
- return 0;
-}
-EXPORT_SYMBOL_GPL(lis3lv02d_init_device);
-
/* Sysfs stuff */
static ssize_t lis3lv02d_position_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int x, y, z;
- lis3lv02d_increase_use(&adev);
- lis3lv02d_get_xyz(adev.device->handle, &x, &y, &z);
- lis3lv02d_decrease_use(&adev);
+ lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z);
return sprintf(buf, "(%d,%d,%d)\n", x, y, z);
}
static ssize_t lis3lv02d_calibrate_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "(%d,%d,%d)\n", adev.xcalib, adev.ycalib, adev.zcalib);
+ return sprintf(buf, "(%d,%d,%d)\n", lis3_dev.xcalib, lis3_dev.ycalib, lis3_dev.zcalib);
}
static ssize_t lis3lv02d_calibrate_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
- lis3lv02d_increase_use(&adev);
lis3lv02d_calibrate_joystick();
- lis3lv02d_decrease_use(&adev);
return count;
}
u8 ctrl;
int val;
- lis3lv02d_increase_use(&adev);
- adev.read(adev.device->handle, CTRL_REG1, &ctrl);
- lis3lv02d_decrease_use(&adev);
+ lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl);
val = (ctrl & (CTRL1_DF0 | CTRL1_DF1)) >> 4;
return sprintf(buf, "%d\n", lis3lv02dl_df_val[val]);
}
};
-static int lis3lv02d_add_fs(struct acpi_device *device)
+static int lis3lv02d_add_fs(struct lis3lv02d *lis3)
{
- adev.pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0);
- if (IS_ERR(adev.pdev))
- return PTR_ERR(adev.pdev);
+ lis3->pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0);
+ if (IS_ERR(lis3->pdev))
+ return PTR_ERR(lis3->pdev);
- return sysfs_create_group(&adev.pdev->dev.kobj, &lis3lv02d_attribute_group);
+ return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
}
-int lis3lv02d_remove_fs(void)
+int lis3lv02d_remove_fs(struct lis3lv02d *lis3)
{
- sysfs_remove_group(&adev.pdev->dev.kobj, &lis3lv02d_attribute_group);
- platform_device_unregister(adev.pdev);
+ sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
+ platform_device_unregister(lis3->pdev);
return 0;
}
EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs);
+/*
+ * Initialise the accelerometer and the various subsystems.
+ * Should be rather independant of the bus system.
+ */
+int lis3lv02d_init_device(struct lis3lv02d *dev)
+{
+ dev->whoami = lis3lv02d_read_8(dev, WHO_AM_I);
+
+ switch (dev->whoami) {
+ case LIS_DOUBLE_ID:
+ printk(KERN_INFO DRIVER_NAME ": 2-byte sensor found\n");
+ dev->read_data = lis3lv02d_read_16;
+ dev->mdps_max_val = 2048;
+ break;
+ case LIS_SINGLE_ID:
+ printk(KERN_INFO DRIVER_NAME ": 1-byte sensor found\n");
+ dev->read_data = lis3lv02d_read_8;
+ dev->mdps_max_val = 128;
+ break;
+ default:
+ printk(KERN_ERR DRIVER_NAME
+ ": unknown sensor type 0x%X\n", dev->whoami);
+ return -EINVAL;
+ }
+
+ lis3lv02d_add_fs(dev);
+ lis3lv02d_poweron(dev);
+
+ if (lis3lv02d_joystick_enable())
+ printk(KERN_ERR DRIVER_NAME ": joystick initialization failed\n");
+
+ /* bail if we did not get an IRQ from the bus layer */
+ if (!dev->irq) {
+ printk(KERN_ERR DRIVER_NAME
+ ": No IRQ. Disabling /dev/freefall\n");
+ goto out;
+ }
+
+ if (misc_register(&lis3lv02d_misc_device))
+ printk(KERN_ERR DRIVER_NAME ": misc_register failed\n");
+out:
+ return 0;
+}
+EXPORT_SYMBOL_GPL(lis3lv02d_init_device);
+
MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver");
MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
MODULE_LICENSE("GPL");
git.samba.org / sfrench / cifs-2.6.git / blobdiff