| /* |
| * lis3lv02d.c - ST LIS3LV02DL accelerometer driver |
| * |
| * Copyright (C) 2007-2008 Yan Burman |
| * Copyright (C) 2008 Eric Piel |
| * Copyright (C) 2008-2009 Pavel Machek |
| * |
| * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/dmi.h> |
| #include <linux/module.h> |
| #include <linux/types.h> |
| #include <linux/platform_device.h> |
| #include <linux/interrupt.h> |
| #include <linux/input-polldev.h> |
| #include <linux/delay.h> |
| #include <linux/wait.h> |
| #include <linux/poll.h> |
| #include <linux/slab.h> |
| #include <linux/freezer.h> |
| #include <linux/uaccess.h> |
| #include <linux/miscdevice.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/atomic.h> |
| #include "lis3lv02d.h" |
| |
| #define DRIVER_NAME "lis3lv02d" |
| |
| /* joystick device poll interval in milliseconds */ |
| #define MDPS_POLL_INTERVAL 50 |
| #define MDPS_POLL_MIN 0 |
| #define MDPS_POLL_MAX 2000 |
| |
| #define LIS3_SYSFS_POWERDOWN_DELAY 5000 /* In milliseconds */ |
| |
| #define SELFTEST_OK 0 |
| #define SELFTEST_FAIL -1 |
| #define SELFTEST_IRQ -2 |
| |
| #define IRQ_LINE0 0 |
| #define IRQ_LINE1 1 |
| |
| /* |
| * The sensor can also generate interrupts (DRDY) but it's pretty pointless |
| * because they are generated even if the data do not change. So it's better |
| * to keep the interrupt for the free-fall event. The values are updated at |
| * 40Hz (at the lowest frequency), but as it can be pretty time consuming on |
| * some low processor, we poll the sensor only at 20Hz... enough for the |
| * joystick. |
| */ |
| |
| #define LIS3_PWRON_DELAY_WAI_12B (5000) |
| #define LIS3_PWRON_DELAY_WAI_8B (3000) |
| |
| /* |
| * LIS3LV02D spec says 1024 LSBs corresponds 1 G -> 1LSB is 1000/1024 mG |
| * LIS302D spec says: 18 mG / digit |
| * LIS3_ACCURACY is used to increase accuracy of the intermediate |
| * calculation results. |
| */ |
| #define LIS3_ACCURACY 1024 |
| /* Sensitivity values for -2G +2G scale */ |
| #define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024) |
| #define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY) |
| |
| #define LIS3_DEFAULT_FUZZ_12B 3 |
| #define LIS3_DEFAULT_FLAT_12B 3 |
| #define LIS3_DEFAULT_FUZZ_8B 1 |
| #define LIS3_DEFAULT_FLAT_8B 1 |
| |
| struct lis3lv02d lis3_dev = { |
| .misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait), |
| }; |
| EXPORT_SYMBOL_GPL(lis3_dev); |
| |
| /* just like param_set_int() but does sanity-check so that it won't point |
| * over the axis array size |
| */ |
| static int param_set_axis(const char *val, const struct kernel_param *kp) |
| { |
| int ret = param_set_int(val, kp); |
| if (!ret) { |
| int val = *(int *)kp->arg; |
| if (val < 0) |
| val = -val; |
| if (!val || val > 3) |
| return -EINVAL; |
| } |
| return ret; |
| } |
| |
| static struct kernel_param_ops param_ops_axis = { |
| .set = param_set_axis, |
| .get = param_get_int, |
| }; |
| |
| module_param_array_named(axes, lis3_dev.ac.as_array, axis, NULL, 0644); |
| MODULE_PARM_DESC(axes, "Axis-mapping for x,y,z directions"); |
| |
| 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_12(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 |
| * @axis: 1,2,3 - can also be negative |
| * @hw_values: raw values returned by the hardware |
| * |
| * Returns the converted value. |
| */ |
| static inline int lis3lv02d_get_axis(s8 axis, int hw_values[3]) |
| { |
| if (axis > 0) |
| return hw_values[axis - 1]; |
| else |
| return -hw_values[-axis - 1]; |
| } |
| |
| /** |
| * lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer |
| * @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(struct lis3lv02d *lis3, int *x, int *y, int *z) |
| { |
| int position[3]; |
| int i; |
| |
| if (lis3->blkread) { |
| if (lis3_dev.whoami == WAI_12B) { |
| u16 data[3]; |
| lis3->blkread(lis3, OUTX_L, 6, (u8 *)data); |
| for (i = 0; i < 3; i++) |
| position[i] = (s16)le16_to_cpu(data[i]); |
| } else { |
| u8 data[5]; |
| /* Data: x, dummy, y, dummy, z */ |
| lis3->blkread(lis3, OUTX, 5, data); |
| for (i = 0; i < 3; i++) |
| position[i] = (s8)data[i * 2]; |
| } |
| } else { |
| position[0] = lis3->read_data(lis3, OUTX); |
| position[1] = lis3->read_data(lis3, OUTY); |
| position[2] = lis3->read_data(lis3, OUTZ); |
| } |
| |
| for (i = 0; i < 3; i++) |
| position[i] = (position[i] * lis3->scale) / LIS3_ACCURACY; |
| |
| *x = lis3lv02d_get_axis(lis3->ac.x, position); |
| *y = lis3lv02d_get_axis(lis3->ac.y, position); |
| *z = lis3lv02d_get_axis(lis3->ac.z, position); |
| } |
| |
| /* conversion btw sampling rate and the register values */ |
| static int lis3_12_rates[4] = {40, 160, 640, 2560}; |
| static int lis3_8_rates[2] = {100, 400}; |
| static int lis3_3dc_rates[16] = {0, 1, 10, 25, 50, 100, 200, 400, 1600, 5000}; |
| |
| /* ODR is Output Data Rate */ |
| static int lis3lv02d_get_odr(void) |
| { |
| u8 ctrl; |
| int shift; |
| |
| lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl); |
| ctrl &= lis3_dev.odr_mask; |
| shift = ffs(lis3_dev.odr_mask) - 1; |
| return lis3_dev.odrs[(ctrl >> shift)]; |
| } |
| |
| static int lis3lv02d_get_pwron_wait(struct lis3lv02d *lis3) |
| { |
| int div = lis3lv02d_get_odr(); |
| |
| if (WARN_ONCE(div == 0, "device returned spurious data")) |
| return -ENXIO; |
| |
| /* LIS3 power on delay is quite long */ |
| msleep(lis3->pwron_delay / div); |
| return 0; |
| } |
| |
| static int lis3lv02d_set_odr(int rate) |
| { |
| u8 ctrl; |
| int i, len, shift; |
| |
| if (!rate) |
| return -EINVAL; |
| |
| lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl); |
| ctrl &= ~lis3_dev.odr_mask; |
| len = 1 << hweight_long(lis3_dev.odr_mask); /* # of possible values */ |
| shift = ffs(lis3_dev.odr_mask) - 1; |
| |
| for (i = 0; i < len; i++) |
| if (lis3_dev.odrs[i] == rate) { |
| lis3_dev.write(&lis3_dev, CTRL_REG1, |
| ctrl | (i << shift)); |
| return 0; |
| } |
| return -EINVAL; |
| } |
| |
| static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3]) |
| { |
| u8 ctlreg, reg; |
| s16 x, y, z; |
| u8 selftest; |
| int ret; |
| u8 ctrl_reg_data; |
| unsigned char irq_cfg; |
| |
| mutex_lock(&lis3->mutex); |
| |
| irq_cfg = lis3->irq_cfg; |
| if (lis3_dev.whoami == WAI_8B) { |
| lis3->data_ready_count[IRQ_LINE0] = 0; |
| lis3->data_ready_count[IRQ_LINE1] = 0; |
| |
| /* Change interrupt cfg to data ready for selftest */ |
| atomic_inc(&lis3_dev.wake_thread); |
| lis3->irq_cfg = LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY; |
| lis3->read(lis3, CTRL_REG3, &ctrl_reg_data); |
| lis3->write(lis3, CTRL_REG3, (ctrl_reg_data & |
| ~(LIS3_IRQ1_MASK | LIS3_IRQ2_MASK)) | |
| (LIS3_IRQ1_DATA_READY | LIS3_IRQ2_DATA_READY)); |
| } |
| |
| if (lis3_dev.whoami == WAI_3DC) { |
| ctlreg = CTRL_REG4; |
| selftest = CTRL4_ST0; |
| } else { |
| ctlreg = CTRL_REG1; |
| if (lis3_dev.whoami == WAI_12B) |
| selftest = CTRL1_ST; |
| else |
| selftest = CTRL1_STP; |
| } |
| |
| lis3->read(lis3, ctlreg, ®); |
| lis3->write(lis3, ctlreg, (reg | selftest)); |
| ret = lis3lv02d_get_pwron_wait(lis3); |
| if (ret) |
| goto fail; |
| |
| /* Read directly to avoid axis remap */ |
| x = lis3->read_data(lis3, OUTX); |
| y = lis3->read_data(lis3, OUTY); |
| z = lis3->read_data(lis3, OUTZ); |
| |
| /* back to normal settings */ |
| lis3->write(lis3, ctlreg, reg); |
| ret = lis3lv02d_get_pwron_wait(lis3); |
| if (ret) |
| goto fail; |
| |
| results[0] = x - lis3->read_data(lis3, OUTX); |
| results[1] = y - lis3->read_data(lis3, OUTY); |
| results[2] = z - lis3->read_data(lis3, OUTZ); |
| |
| ret = 0; |
| |
| if (lis3_dev.whoami == WAI_8B) { |
| /* Restore original interrupt configuration */ |
| atomic_dec(&lis3_dev.wake_thread); |
| lis3->write(lis3, CTRL_REG3, ctrl_reg_data); |
| lis3->irq_cfg = irq_cfg; |
| |
| if ((irq_cfg & LIS3_IRQ1_MASK) && |
| lis3->data_ready_count[IRQ_LINE0] < 2) { |
| ret = SELFTEST_IRQ; |
| goto fail; |
| } |
| |
| if ((irq_cfg & LIS3_IRQ2_MASK) && |
| lis3->data_ready_count[IRQ_LINE1] < 2) { |
| ret = SELFTEST_IRQ; |
| goto fail; |
| } |
| } |
| |
| if (lis3->pdata) { |
| int i; |
| for (i = 0; i < 3; i++) { |
| /* Check against selftest acceptance limits */ |
| if ((results[i] < lis3->pdata->st_min_limits[i]) || |
| (results[i] > lis3->pdata->st_max_limits[i])) { |
| ret = SELFTEST_FAIL; |
| goto fail; |
| } |
| } |
| } |
| |
| /* test passed */ |
| fail: |
| mutex_unlock(&lis3->mutex); |
| return ret; |
| } |
| |
| /* |
| * Order of registers in the list affects to order of the restore process. |
| * Perhaps it is a good idea to set interrupt enable register as a last one |
| * after all other configurations |
| */ |
| static u8 lis3_wai8_regs[] = { FF_WU_CFG_1, FF_WU_THS_1, FF_WU_DURATION_1, |
| FF_WU_CFG_2, FF_WU_THS_2, FF_WU_DURATION_2, |
| CLICK_CFG, CLICK_SRC, CLICK_THSY_X, CLICK_THSZ, |
| CLICK_TIMELIMIT, CLICK_LATENCY, CLICK_WINDOW, |
| CTRL_REG1, CTRL_REG2, CTRL_REG3}; |
| |
| static u8 lis3_wai12_regs[] = {FF_WU_CFG, FF_WU_THS_L, FF_WU_THS_H, |
| FF_WU_DURATION, DD_CFG, DD_THSI_L, DD_THSI_H, |
| DD_THSE_L, DD_THSE_H, |
| CTRL_REG1, CTRL_REG3, CTRL_REG2}; |
| |
| static inline void lis3_context_save(struct lis3lv02d *lis3) |
| { |
| int i; |
| for (i = 0; i < lis3->regs_size; i++) |
| lis3->read(lis3, lis3->regs[i], &lis3->reg_cache[i]); |
| lis3->regs_stored = true; |
| } |
| |
| static inline void lis3_context_restore(struct lis3lv02d *lis3) |
| { |
| int i; |
| if (lis3->regs_stored) |
| for (i = 0; i < lis3->regs_size; i++) |
| lis3->write(lis3, lis3->regs[i], lis3->reg_cache[i]); |
| } |
| |
| void lis3lv02d_poweroff(struct lis3lv02d *lis3) |
| { |
| if (lis3->reg_ctrl) |
| lis3_context_save(lis3); |
| /* disable X,Y,Z axis and power down */ |
| lis3->write(lis3, CTRL_REG1, 0x00); |
| if (lis3->reg_ctrl) |
| lis3->reg_ctrl(lis3, LIS3_REG_OFF); |
| } |
| EXPORT_SYMBOL_GPL(lis3lv02d_poweroff); |
| |
| int lis3lv02d_poweron(struct lis3lv02d *lis3) |
| { |
| int err; |
| u8 reg; |
| |
| lis3->init(lis3); |
| |
| /* |
| * Common configuration |
| * BDU: (12 bits sensors only) LSB and MSB values are not updated until |
| * both have been read. So the value read will always be correct. |
| * Set BOOT bit to refresh factory tuning values. |
| */ |
| if (lis3->pdata) { |
| lis3->read(lis3, CTRL_REG2, ®); |
| if (lis3->whoami == WAI_12B) |
| reg |= CTRL2_BDU | CTRL2_BOOT; |
| else |
| reg |= CTRL2_BOOT_8B; |
| lis3->write(lis3, CTRL_REG2, reg); |
| } |
| |
| err = lis3lv02d_get_pwron_wait(lis3); |
| if (err) |
| return err; |
| |
| if (lis3->reg_ctrl) |
| lis3_context_restore(lis3); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(lis3lv02d_poweron); |
| |
| |
| static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev) |
| { |
| int x, y, z; |
| |
| mutex_lock(&lis3_dev.mutex); |
| lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z); |
| input_report_abs(pidev->input, ABS_X, x); |
| input_report_abs(pidev->input, ABS_Y, y); |
| input_report_abs(pidev->input, ABS_Z, z); |
| input_sync(pidev->input); |
| mutex_unlock(&lis3_dev.mutex); |
| } |
| |
| static void lis3lv02d_joystick_open(struct input_polled_dev *pidev) |
| { |
| if (lis3_dev.pm_dev) |
| pm_runtime_get_sync(lis3_dev.pm_dev); |
| |
| if (lis3_dev.pdata && lis3_dev.whoami == WAI_8B && lis3_dev.idev) |
| atomic_set(&lis3_dev.wake_thread, 1); |
| /* |
| * Update coordinates for the case where poll interval is 0 and |
| * the chip in running purely under interrupt control |
| */ |
| lis3lv02d_joystick_poll(pidev); |
| } |
| |
| static void lis3lv02d_joystick_close(struct input_polled_dev *pidev) |
| { |
| atomic_set(&lis3_dev.wake_thread, 0); |
| if (lis3_dev.pm_dev) |
| pm_runtime_put(lis3_dev.pm_dev); |
| } |
| |
| static irqreturn_t lis302dl_interrupt(int irq, void *dummy) |
| { |
| if (!test_bit(0, &lis3_dev.misc_opened)) |
| goto out; |
| |
| /* |
| * Be careful: on some HP laptops the bios force DD when on battery and |
| * the lid is closed. This leads to interrupts as soon as a little move |
| * is done. |
| */ |
| atomic_inc(&lis3_dev.count); |
| |
| wake_up_interruptible(&lis3_dev.misc_wait); |
| kill_fasync(&lis3_dev.async_queue, SIGIO, POLL_IN); |
| out: |
| if (atomic_read(&lis3_dev.wake_thread)) |
| return IRQ_WAKE_THREAD; |
| return IRQ_HANDLED; |
| } |
| |
| static void lis302dl_interrupt_handle_click(struct lis3lv02d *lis3) |
| { |
| struct input_dev *dev = lis3->idev->input; |
| u8 click_src; |
| |
| mutex_lock(&lis3->mutex); |
| lis3->read(lis3, CLICK_SRC, &click_src); |
| |
| if (click_src & CLICK_SINGLE_X) { |
| input_report_key(dev, lis3->mapped_btns[0], 1); |
| input_report_key(dev, lis3->mapped_btns[0], 0); |
| } |
| |
| if (click_src & CLICK_SINGLE_Y) { |
| input_report_key(dev, lis3->mapped_btns[1], 1); |
| input_report_key(dev, lis3->mapped_btns[1], 0); |
| } |
| |
| if (click_src & CLICK_SINGLE_Z) { |
| input_report_key(dev, lis3->mapped_btns[2], 1); |
| input_report_key(dev, lis3->mapped_btns[2], 0); |
| } |
| input_sync(dev); |
| mutex_unlock(&lis3->mutex); |
| } |
| |
| static inline void lis302dl_data_ready(struct lis3lv02d *lis3, int index) |
| { |
| int dummy; |
| |
| /* Dummy read to ack interrupt */ |
| lis3lv02d_get_xyz(lis3, &dummy, &dummy, &dummy); |
| lis3->data_ready_count[index]++; |
| } |
| |
| static irqreturn_t lis302dl_interrupt_thread1_8b(int irq, void *data) |
| { |
| struct lis3lv02d *lis3 = data; |
| u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ1_MASK; |
| |
| if (irq_cfg == LIS3_IRQ1_CLICK) |
| lis302dl_interrupt_handle_click(lis3); |
| else if (unlikely(irq_cfg == LIS3_IRQ1_DATA_READY)) |
| lis302dl_data_ready(lis3, IRQ_LINE0); |
| else |
| lis3lv02d_joystick_poll(lis3->idev); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t lis302dl_interrupt_thread2_8b(int irq, void *data) |
| { |
| struct lis3lv02d *lis3 = data; |
| u8 irq_cfg = lis3->irq_cfg & LIS3_IRQ2_MASK; |
| |
| if (irq_cfg == LIS3_IRQ2_CLICK) |
| lis302dl_interrupt_handle_click(lis3); |
| else if (unlikely(irq_cfg == LIS3_IRQ2_DATA_READY)) |
| lis302dl_data_ready(lis3, IRQ_LINE1); |
| else |
| lis3lv02d_joystick_poll(lis3->idev); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static int lis3lv02d_misc_open(struct inode *inode, struct file *file) |
| { |
| if (test_and_set_bit(0, &lis3_dev.misc_opened)) |
| return -EBUSY; /* already open */ |
| |
| if (lis3_dev.pm_dev) |
| pm_runtime_get_sync(lis3_dev.pm_dev); |
| |
| atomic_set(&lis3_dev.count, 0); |
| return 0; |
| } |
| |
| static int lis3lv02d_misc_release(struct inode *inode, struct file *file) |
| { |
| fasync_helper(-1, file, 0, &lis3_dev.async_queue); |
| clear_bit(0, &lis3_dev.misc_opened); /* release the device */ |
| if (lis3_dev.pm_dev) |
| pm_runtime_put(lis3_dev.pm_dev); |
| return 0; |
| } |
| |
| static ssize_t lis3lv02d_misc_read(struct file *file, char __user *buf, |
| size_t count, loff_t *pos) |
| { |
| DECLARE_WAITQUEUE(wait, current); |
| u32 data; |
| unsigned char byte_data; |
| ssize_t retval = 1; |
| |
| if (count < 1) |
| return -EINVAL; |
| |
| add_wait_queue(&lis3_dev.misc_wait, &wait); |
| while (true) { |
| set_current_state(TASK_INTERRUPTIBLE); |
| data = atomic_xchg(&lis3_dev.count, 0); |
| if (data) |
| break; |
| |
| if (file->f_flags & O_NONBLOCK) { |
| retval = -EAGAIN; |
| goto out; |
| } |
| |
| if (signal_pending(current)) { |
| retval = -ERESTARTSYS; |
| goto out; |
| } |
| |
| schedule(); |
| } |
| |
| if (data < 255) |
| byte_data = data; |
| else |
| byte_data = 255; |
| |
| /* make sure we are not going into copy_to_user() with |
| * TASK_INTERRUPTIBLE state */ |
| set_current_state(TASK_RUNNING); |
| if (copy_to_user(buf, &byte_data, sizeof(byte_data))) |
| retval = -EFAULT; |
| |
| out: |
| __set_current_state(TASK_RUNNING); |
| 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, &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, &lis3_dev.async_queue); |
| } |
| |
| static const struct file_operations lis3lv02d_misc_fops = { |
| .owner = THIS_MODULE, |
| .llseek = no_llseek, |
| .read = lis3lv02d_misc_read, |
| .open = lis3lv02d_misc_open, |
| .release = lis3lv02d_misc_release, |
| .poll = lis3lv02d_misc_poll, |
| .fasync = lis3lv02d_misc_fasync, |
| }; |
| |
| static struct miscdevice lis3lv02d_misc_device = { |
| .minor = MISC_DYNAMIC_MINOR, |
| .name = "freefall", |
| .fops = &lis3lv02d_misc_fops, |
| }; |
| |
| int lis3lv02d_joystick_enable(struct lis3lv02d *lis3) |
| { |
| struct input_dev *input_dev; |
| int err; |
| int max_val, fuzz, flat; |
| int btns[] = {BTN_X, BTN_Y, BTN_Z}; |
| |
| if (lis3_dev.idev) |
| return -EINVAL; |
| |
| lis3_dev.idev = input_allocate_polled_device(); |
| if (!lis3_dev.idev) |
| return -ENOMEM; |
| |
| lis3_dev.idev->poll = lis3lv02d_joystick_poll; |
| lis3_dev.idev->open = lis3lv02d_joystick_open; |
| lis3_dev.idev->close = lis3lv02d_joystick_close; |
| lis3_dev.idev->poll_interval = MDPS_POLL_INTERVAL; |
| lis3_dev.idev->poll_interval_min = MDPS_POLL_MIN; |
| lis3_dev.idev->poll_interval_max = MDPS_POLL_MAX; |
| input_dev = lis3_dev.idev->input; |
| |
| input_dev->name = "ST LIS3LV02DL Accelerometer"; |
| input_dev->phys = DRIVER_NAME "/input0"; |
| input_dev->id.bustype = BUS_HOST; |
| input_dev->id.vendor = 0; |
| input_dev->dev.parent = &lis3_dev.pdev->dev; |
| |
| set_bit(EV_ABS, input_dev->evbit); |
| max_val = (lis3_dev.mdps_max_val * lis3_dev.scale) / LIS3_ACCURACY; |
| if (lis3_dev.whoami == WAI_12B) { |
| fuzz = LIS3_DEFAULT_FUZZ_12B; |
| flat = LIS3_DEFAULT_FLAT_12B; |
| } else { |
| fuzz = LIS3_DEFAULT_FUZZ_8B; |
| flat = LIS3_DEFAULT_FLAT_8B; |
| } |
| fuzz = (fuzz * lis3_dev.scale) / LIS3_ACCURACY; |
| flat = (flat * lis3_dev.scale) / LIS3_ACCURACY; |
| |
| input_set_abs_params(input_dev, ABS_X, -max_val, max_val, fuzz, flat); |
| input_set_abs_params(input_dev, ABS_Y, -max_val, max_val, fuzz, flat); |
| input_set_abs_params(input_dev, ABS_Z, -max_val, max_val, fuzz, flat); |
| |
| lis3_dev.mapped_btns[0] = lis3lv02d_get_axis(abs(lis3_dev.ac.x), btns); |
| lis3_dev.mapped_btns[1] = lis3lv02d_get_axis(abs(lis3_dev.ac.y), btns); |
| lis3_dev.mapped_btns[2] = lis3lv02d_get_axis(abs(lis3_dev.ac.z), btns); |
| |
| err = input_register_polled_device(lis3_dev.idev); |
| if (err) { |
| input_free_polled_device(lis3_dev.idev); |
| lis3_dev.idev = NULL; |
| } |
| |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(lis3lv02d_joystick_enable); |
| |
| void lis3lv02d_joystick_disable(struct lis3lv02d *lis3) |
| { |
| if (lis3_dev.irq) |
| free_irq(lis3_dev.irq, &lis3_dev); |
| if (lis3_dev.pdata && lis3_dev.pdata->irq2) |
| free_irq(lis3_dev.pdata->irq2, &lis3_dev); |
| |
| if (!lis3_dev.idev) |
| return; |
| |
| if (lis3_dev.irq) |
| misc_deregister(&lis3lv02d_misc_device); |
| input_unregister_polled_device(lis3_dev.idev); |
| input_free_polled_device(lis3_dev.idev); |
| lis3_dev.idev = NULL; |
| } |
| EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable); |
| |
| /* Sysfs stuff */ |
| static void lis3lv02d_sysfs_poweron(struct lis3lv02d *lis3) |
| { |
| /* |
| * SYSFS functions are fast visitors so put-call |
| * immediately after the get-call. However, keep |
| * chip running for a while and schedule delayed |
| * suspend. This way periodic sysfs calls doesn't |
| * suffer from relatively long power up time. |
| */ |
| |
| if (lis3->pm_dev) { |
| pm_runtime_get_sync(lis3->pm_dev); |
| pm_runtime_put_noidle(lis3->pm_dev); |
| pm_schedule_suspend(lis3->pm_dev, LIS3_SYSFS_POWERDOWN_DELAY); |
| } |
| } |
| |
| static ssize_t lis3lv02d_selftest_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| s16 values[3]; |
| |
| static const char ok[] = "OK"; |
| static const char fail[] = "FAIL"; |
| static const char irq[] = "FAIL_IRQ"; |
| const char *res; |
| |
| lis3lv02d_sysfs_poweron(&lis3_dev); |
| switch (lis3lv02d_selftest(&lis3_dev, values)) { |
| case SELFTEST_FAIL: |
| res = fail; |
| break; |
| case SELFTEST_IRQ: |
| res = irq; |
| break; |
| case SELFTEST_OK: |
| default: |
| res = ok; |
| break; |
| } |
| return sprintf(buf, "%s %d %d %d\n", res, |
| values[0], values[1], values[2]); |
| } |
| |
| static ssize_t lis3lv02d_position_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| int x, y, z; |
| |
| lis3lv02d_sysfs_poweron(&lis3_dev); |
| mutex_lock(&lis3_dev.mutex); |
| lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z); |
| mutex_unlock(&lis3_dev.mutex); |
| return sprintf(buf, "(%d,%d,%d)\n", x, y, z); |
| } |
| |
| static ssize_t lis3lv02d_rate_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| lis3lv02d_sysfs_poweron(&lis3_dev); |
| return sprintf(buf, "%d\n", lis3lv02d_get_odr()); |
| } |
| |
| static ssize_t lis3lv02d_rate_set(struct device *dev, |
| struct device_attribute *attr, const char *buf, |
| size_t count) |
| { |
| unsigned long rate; |
| |
| if (strict_strtoul(buf, 0, &rate)) |
| return -EINVAL; |
| |
| lis3lv02d_sysfs_poweron(&lis3_dev); |
| if (lis3lv02d_set_odr(rate)) |
| return -EINVAL; |
| |
| return count; |
| } |
| |
| static DEVICE_ATTR(selftest, S_IRUSR, lis3lv02d_selftest_show, NULL); |
| static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL); |
| static DEVICE_ATTR(rate, S_IRUGO | S_IWUSR, lis3lv02d_rate_show, |
| lis3lv02d_rate_set); |
| |
| static struct attribute *lis3lv02d_attributes[] = { |
| &dev_attr_selftest.attr, |
| &dev_attr_position.attr, |
| &dev_attr_rate.attr, |
| NULL |
| }; |
| |
| static struct attribute_group lis3lv02d_attribute_group = { |
| .attrs = lis3lv02d_attributes |
| }; |
| |
| |
| static int lis3lv02d_add_fs(struct lis3lv02d *lis3) |
| { |
| 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(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group); |
| } |
| |
| int lis3lv02d_remove_fs(struct lis3lv02d *lis3) |
| { |
| sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group); |
| platform_device_unregister(lis3->pdev); |
| if (lis3->pm_dev) { |
| /* Barrier after the sysfs remove */ |
| pm_runtime_barrier(lis3->pm_dev); |
| |
| /* SYSFS may have left chip running. Turn off if necessary */ |
| if (!pm_runtime_suspended(lis3->pm_dev)) |
| lis3lv02d_poweroff(&lis3_dev); |
| |
| pm_runtime_disable(lis3->pm_dev); |
| pm_runtime_set_suspended(lis3->pm_dev); |
| } |
| kfree(lis3->reg_cache); |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs); |
| |
| static void lis3lv02d_8b_configure(struct lis3lv02d *lis3, |
| struct lis3lv02d_platform_data *p) |
| { |
| int err; |
| int ctrl2 = p->hipass_ctrl; |
| |
| if (p->click_flags) { |
| lis3->write(lis3, CLICK_CFG, p->click_flags); |
| lis3->write(lis3, CLICK_TIMELIMIT, p->click_time_limit); |
| lis3->write(lis3, CLICK_LATENCY, p->click_latency); |
| lis3->write(lis3, CLICK_WINDOW, p->click_window); |
| lis3->write(lis3, CLICK_THSZ, p->click_thresh_z & 0xf); |
| lis3->write(lis3, CLICK_THSY_X, |
| (p->click_thresh_x & 0xf) | |
| (p->click_thresh_y << 4)); |
| |
| if (lis3->idev) { |
| struct input_dev *input_dev = lis3_dev.idev->input; |
| input_set_capability(input_dev, EV_KEY, BTN_X); |
| input_set_capability(input_dev, EV_KEY, BTN_Y); |
| input_set_capability(input_dev, EV_KEY, BTN_Z); |
| } |
| } |
| |
| if (p->wakeup_flags) { |
| lis3->write(lis3, FF_WU_CFG_1, p->wakeup_flags); |
| lis3->write(lis3, FF_WU_THS_1, p->wakeup_thresh & 0x7f); |
| /* pdata value + 1 to keep this backward compatible*/ |
| lis3->write(lis3, FF_WU_DURATION_1, p->duration1 + 1); |
| ctrl2 ^= HP_FF_WU1; /* Xor to keep compatible with old pdata*/ |
| } |
| |
| if (p->wakeup_flags2) { |
| lis3->write(lis3, FF_WU_CFG_2, p->wakeup_flags2); |
| lis3->write(lis3, FF_WU_THS_2, p->wakeup_thresh2 & 0x7f); |
| /* pdata value + 1 to keep this backward compatible*/ |
| lis3->write(lis3, FF_WU_DURATION_2, p->duration2 + 1); |
| ctrl2 ^= HP_FF_WU2; /* Xor to keep compatible with old pdata*/ |
| } |
| /* Configure hipass filters */ |
| lis3->write(lis3, CTRL_REG2, ctrl2); |
| |
| if (p->irq2) { |
| err = request_threaded_irq(p->irq2, |
| NULL, |
| lis302dl_interrupt_thread2_8b, |
| IRQF_TRIGGER_RISING | IRQF_ONESHOT | |
| (p->irq_flags2 & IRQF_TRIGGER_MASK), |
| DRIVER_NAME, &lis3_dev); |
| if (err < 0) |
| pr_err("No second IRQ. Limited functionality\n"); |
| } |
| } |
| |
| /* |
| * Initialise the accelerometer and the various subsystems. |
| * Should be rather independent of the bus system. |
| */ |
| int lis3lv02d_init_device(struct lis3lv02d *lis3) |
| { |
| int err; |
| irq_handler_t thread_fn; |
| int irq_flags = 0; |
| |
| lis3->whoami = lis3lv02d_read_8(lis3, WHO_AM_I); |
| |
| switch (lis3->whoami) { |
| case WAI_12B: |
| pr_info("12 bits sensor found\n"); |
| lis3->read_data = lis3lv02d_read_12; |
| lis3->mdps_max_val = 2048; |
| lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_12B; |
| lis3->odrs = lis3_12_rates; |
| lis3->odr_mask = CTRL1_DF0 | CTRL1_DF1; |
| lis3->scale = LIS3_SENSITIVITY_12B; |
| lis3->regs = lis3_wai12_regs; |
| lis3->regs_size = ARRAY_SIZE(lis3_wai12_regs); |
| break; |
| case WAI_8B: |
| pr_info("8 bits sensor found\n"); |
| lis3->read_data = lis3lv02d_read_8; |
| lis3->mdps_max_val = 128; |
| lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B; |
| lis3->odrs = lis3_8_rates; |
| lis3->odr_mask = CTRL1_DR; |
| lis3->scale = LIS3_SENSITIVITY_8B; |
| lis3->regs = lis3_wai8_regs; |
| lis3->regs_size = ARRAY_SIZE(lis3_wai8_regs); |
| break; |
| case WAI_3DC: |
| pr_info("8 bits 3DC sensor found\n"); |
| lis3->read_data = lis3lv02d_read_8; |
| lis3->mdps_max_val = 128; |
| lis3->pwron_delay = LIS3_PWRON_DELAY_WAI_8B; |
| lis3->odrs = lis3_3dc_rates; |
| lis3->odr_mask = CTRL1_ODR0|CTRL1_ODR1|CTRL1_ODR2|CTRL1_ODR3; |
| lis3->scale = LIS3_SENSITIVITY_8B; |
| break; |
| default: |
| pr_err("unknown sensor type 0x%X\n", lis3->whoami); |
| return -EINVAL; |
| } |
| |
| lis3->reg_cache = kzalloc(max(sizeof(lis3_wai8_regs), |
| sizeof(lis3_wai12_regs)), GFP_KERNEL); |
| |
| if (lis3->reg_cache == NULL) { |
| printk(KERN_ERR DRIVER_NAME "out of memory\n"); |
| return -ENOMEM; |
| } |
| |
| mutex_init(&lis3->mutex); |
| atomic_set(&lis3->wake_thread, 0); |
| |
| lis3lv02d_add_fs(lis3); |
| err = lis3lv02d_poweron(lis3); |
| if (err) { |
| lis3lv02d_remove_fs(lis3); |
| return err; |
| } |
| |
| if (lis3->pm_dev) { |
| pm_runtime_set_active(lis3->pm_dev); |
| pm_runtime_enable(lis3->pm_dev); |
| } |
| |
| if (lis3lv02d_joystick_enable(lis3)) |
| pr_err("joystick initialization failed\n"); |
| |
| /* passing in platform specific data is purely optional and only |
| * used by the SPI transport layer at the moment */ |
| if (lis3->pdata) { |
| struct lis3lv02d_platform_data *p = lis3->pdata; |
| |
| if (lis3->whoami == WAI_8B) |
| lis3lv02d_8b_configure(lis3, p); |
| |
| irq_flags = p->irq_flags1 & IRQF_TRIGGER_MASK; |
| |
| lis3->irq_cfg = p->irq_cfg; |
| if (p->irq_cfg) |
| lis3->write(lis3, CTRL_REG3, p->irq_cfg); |
| |
| if (p->default_rate) |
| lis3lv02d_set_odr(p->default_rate); |
| } |
| |
| /* bail if we did not get an IRQ from the bus layer */ |
| if (!lis3->irq) { |
| pr_debug("No IRQ. Disabling /dev/freefall\n"); |
| goto out; |
| } |
| |
| /* |
| * The sensor can generate interrupts for free-fall and direction |
| * detection (distinguishable with FF_WU_SRC and DD_SRC) but to keep |
| * the things simple and _fast_ we activate it only for free-fall, so |
| * no need to read register (very slow with ACPI). For the same reason, |
| * we forbid shared interrupts. |
| * |
| * IRQF_TRIGGER_RISING seems pointless on HP laptops because the |
| * io-apic is not configurable (and generates a warning) but I keep it |
| * in case of support for other hardware. |
| */ |
| if (lis3->pdata && lis3->whoami == WAI_8B) |
| thread_fn = lis302dl_interrupt_thread1_8b; |
| else |
| thread_fn = NULL; |
| |
| err = request_threaded_irq(lis3->irq, lis302dl_interrupt, |
| thread_fn, |
| IRQF_TRIGGER_RISING | IRQF_ONESHOT | |
| irq_flags, |
| DRIVER_NAME, &lis3_dev); |
| |
| if (err < 0) { |
| pr_err("Cannot get IRQ\n"); |
| goto out; |
| } |
| |
| if (misc_register(&lis3lv02d_misc_device)) |
| pr_err("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"); |