From 6917f96fccec8030750f87dd808a63d388b96153 Mon Sep 17 00:00:00 2001 From: lyx Date: Fri, 25 Mar 2011 19:16:16 -0700 Subject: [PATCH] move compass driver from staging to input --- drivers/input/Kconfig | 2 + drivers/input/Makefile | 1 + drivers/input/magnetometer/Kconfig | 25 + drivers/input/magnetometer/Makefile | 5 + drivers/input/magnetometer/ak8973.c | 751 +++++++++++++++++++++++ drivers/input/magnetometer/ak8973.h | 53 ++ drivers/input/magnetometer/ak8975.c | 910 ++++++++++++++++++++++++++++ drivers/input/magnetometer/ak8975.h | 86 +++ drivers/input/magnetometer/magnet.h | 31 + 9 files changed, 1864 insertions(+) mode change 100644 => 100755 drivers/input/Kconfig mode change 100644 => 100755 drivers/input/Makefile create mode 100755 drivers/input/magnetometer/Kconfig create mode 100755 drivers/input/magnetometer/Makefile create mode 100755 drivers/input/magnetometer/ak8973.c create mode 100755 drivers/input/magnetometer/ak8973.h create mode 100755 drivers/input/magnetometer/ak8975.c create mode 100755 drivers/input/magnetometer/ak8975.h create mode 100755 drivers/input/magnetometer/magnet.h diff --git a/drivers/input/Kconfig b/drivers/input/Kconfig old mode 100644 new mode 100755 index 6e8cf060fe0e..2969c752afd4 --- a/drivers/input/Kconfig +++ b/drivers/input/Kconfig @@ -181,6 +181,8 @@ source "drivers/input/touchscreen/Kconfig" source "drivers/input/misc/Kconfig" +source "drivers/input/magnetometer/Kconfig" + source "drivers/input/gsensor/Kconfig" source "drivers/input/jogball/Kconfig" diff --git a/drivers/input/Makefile b/drivers/input/Makefile old mode 100644 new mode 100755 index b5a3c9b48fdd..fb698381957d --- a/drivers/input/Makefile +++ b/drivers/input/Makefile @@ -28,3 +28,4 @@ obj-$(CONFIG_INPUT_APMPOWER) += apm-power.o obj-$(CONFIG_INPUT_KEYRESET) += keyreset.o obj-$(CONFIG_XEN_KBDDEV_FRONTEND) += xen-kbdfront.o +obj-y += magnetometer/ \ No newline at end of file diff --git a/drivers/input/magnetometer/Kconfig b/drivers/input/magnetometer/Kconfig new file mode 100755 index 000000000000..44c69a239545 --- /dev/null +++ b/drivers/input/magnetometer/Kconfig @@ -0,0 +1,25 @@ +# +# Magnetometer sensors +# + +comment "Magnetometer sensors" + +config COMPASS_AK8975 + tristate "Asahi Kasei AK8975 3-Axis Magnetometer" + depends on I2C + help + Say yes here to build support for Asahi Kasei AK8975 3-Axis + Magnetometer. + + To compile this driver as a module, choose M here: the module + will be called ak8975. + +config COMPASS_AK8973 + tristate "Asahi Kasei AK8973 3-Axis Magnetometer" + depends on I2C + help + Say yes here to build support for Asahi Kasei AK8973 3-Axis + Magnetometer. + + To compile this driver as a module, choose M here: the module + will be called ak8973. diff --git a/drivers/input/magnetometer/Makefile b/drivers/input/magnetometer/Makefile new file mode 100755 index 000000000000..0ffa821f6ab9 --- /dev/null +++ b/drivers/input/magnetometer/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for industrial I/O Magnetometer sensors +# +obj-$(CONFIG_COMPASS_AK8975) := ak8975.o +obj-$(CONFIG_COMPASS_AK8973) := ak8973.o \ No newline at end of file diff --git a/drivers/input/magnetometer/ak8973.c b/drivers/input/magnetometer/ak8973.c new file mode 100755 index 000000000000..6d0b2ca5fabf --- /dev/null +++ b/drivers/input/magnetometer/ak8973.c @@ -0,0 +1,751 @@ +/* + * drivers/i2c/chips/ak8973.c - ak8973 compass driver + * + * Copyright (C) 2008 viral wang + * + * 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; version 2 of the License. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "ak8973.h" +#include + +#define DEBUG 0 +#define MAX_FAILURE_COUNT 3 + +static struct i2c_client *this_client; + +struct akm8973_data { + struct input_dev *input_dev; + struct work_struct work; +#ifdef CONFIG_HAS_EARLYSUSPEND + struct early_suspend early_suspend_akm; +#endif +}; + +/* Addresses to scan -- protected by sense_data_mutex */ +static char sense_data[RBUFF_SIZE + 1]; +static struct mutex sense_data_mutex; +#define AKM8973_RETRY_COUNT 10 +static DECLARE_WAIT_QUEUE_HEAD(data_ready_wq); +static DECLARE_WAIT_QUEUE_HEAD(open_wq); + +static atomic_t data_ready; +static atomic_t open_count; +static atomic_t open_flag; +static atomic_t reserve_open_flag; + +static atomic_t m_flag; +static atomic_t a_flag; +static atomic_t t_flag; +static atomic_t mv_flag; + +static int failure_count = 0; + +static short akmd_delay = 0; +#ifdef CONFIG_HAS_EARLYSUSPEND +static atomic_t suspend_flag = ATOMIC_INIT(0); +#endif + +static int AKI2C_RxData(char *rxData, int length) +{ + uint8_t loop_i; + struct i2c_msg msgs[] = { + { + .addr = this_client->addr, + .flags = 0, + .len = 1, + .buf = rxData, + }, + { + .addr = this_client->addr, + .flags = I2C_M_RD, + .len = length, + .buf = rxData, + }, + }; + + for (loop_i = 0; loop_i < AKM8973_RETRY_COUNT; loop_i++) { + if (i2c_transfer(this_client->adapter, msgs, 2) > 0) { + break; + } + mdelay(10); + } + + if (loop_i >= AKM8973_RETRY_COUNT) { + printk(KERN_ERR "%s retry over %d\n", __func__, AKM8973_RETRY_COUNT); + return -EIO; + } + return 0; +} + +static int AKI2C_TxData(char *txData, int length) +{ + uint8_t loop_i; + struct i2c_msg msg[] = { + { + .addr = this_client->addr, + .flags = 0, + .len = length, + .buf = txData, + }, + }; + + for (loop_i = 0; loop_i < AKM8973_RETRY_COUNT; loop_i++) { + if (i2c_transfer(this_client->adapter, msg, 1) > 0) { + break; + } + mdelay(10); + } + + if (loop_i >= AKM8973_RETRY_COUNT) { + printk(KERN_ERR "%s retry over %d\n", __func__, AKM8973_RETRY_COUNT); + return -EIO; + } + return 0; +} + +static int AKECS_StartMeasure(void) +{ + char buffer[2]; + + /* Set measure mode */ + buffer[0] = AKECS_REG_MS1; + buffer[1] = AKECS_MODE_MEASURE; + + /* Set data */ + return AKI2C_TxData(buffer, 2); +} + +static int AKECS_PowerDown(void) +{ + char buffer[2]; + int ret; + + /* Set powerdown mode */ + buffer[0] = AKECS_REG_MS1; + buffer[1] = AKECS_MODE_POWERDOWN; + /* Set data */ + ret = AKI2C_TxData(buffer, 2); + if (ret < 0) + return ret; + + /* Dummy read for clearing INT pin */ + buffer[0] = AKECS_REG_TMPS; + /* Read data */ + ret = AKI2C_RxData(buffer, 1); + if (ret < 0) + return ret; + return ret; +} + +static int AKECS_StartE2PRead(void) +{ + char buffer[2]; + + /* Set measure mode */ + buffer[0] = AKECS_REG_MS1; + buffer[1] = AKECS_MODE_E2P_READ; + /* Set data */ + return AKI2C_TxData(buffer, 2); +} + +static int AKECS_GetData(void) +{ + char buffer[RBUFF_SIZE + 1]; + int ret; + + memset(buffer, 0, RBUFF_SIZE + 1); + buffer[0] = AKECS_REG_ST; + ret = AKI2C_RxData(buffer, RBUFF_SIZE+1); + if (ret < 0) + return ret; + + mutex_lock(&sense_data_mutex); + memcpy(sense_data, buffer, sizeof(buffer)); + atomic_set(&data_ready, 1); + wake_up(&data_ready_wq); + mutex_unlock(&sense_data_mutex); + + return 0; +} + +static int AKECS_SetMode(char mode) +{ + int ret; + + switch (mode) { + case AKECS_MODE_MEASURE: + ret = AKECS_StartMeasure(); + break; + case AKECS_MODE_E2P_READ: + ret = AKECS_StartE2PRead(); + break; + case AKECS_MODE_POWERDOWN: + ret = AKECS_PowerDown(); + break; + default: + return -EINVAL; + } + + /* wait at least 300us after changing mode */ + msleep(1); + return ret; +} + +static int AKECS_TransRBuff(char *rbuf, int size) +{ + wait_event_interruptible_timeout(data_ready_wq, + atomic_read(&data_ready), 1000); + if (!atomic_read(&data_ready)) { + #ifdef CONFIG_HAS_EARLYSUSPEND + if (!atomic_read(&suspend_flag)) { + printk(KERN_ERR + "AKM8973 AKECS_TransRBUFF: Data not ready\n"); + failure_count++; + if (failure_count >= MAX_FAILURE_COUNT) { + printk(KERN_ERR + "AKM8973 AKECS_TransRBUFF: successive %d failure.\n", + failure_count); + atomic_set(&open_flag, -1); + wake_up(&open_wq); + failure_count = 0; + } + } + #endif + return -1; + } + + mutex_lock(&sense_data_mutex); + memcpy(&rbuf[1], &sense_data[1], size); + atomic_set(&data_ready, 0); + mutex_unlock(&sense_data_mutex); + + failure_count = 0; + return 0; +} + + +static void AKECS_Report_Value(short *rbuf) +{ + struct akm8973_data *data = i2c_get_clientdata(this_client); +#if DEBUG + printk(KERN_INFO"AKECS_Report_Value: yaw = %d, pitch = %d, roll = %d\n", rbuf[0], + rbuf[1], rbuf[2]); + printk(KERN_INFO" tmp = %d, m_stat= %d, g_stat=%d\n", rbuf[3], + rbuf[4], rbuf[5]); + printk(KERN_INFO" G_Sensor: x = %d LSB, y = %d LSB, z = %d LSB\n", + rbuf[6], rbuf[7], rbuf[8]); +#endif + /* Report magnetic sensor information */ + if (atomic_read(&m_flag)) { + input_report_abs(data->input_dev, ABS_RX, rbuf[0]); + input_report_abs(data->input_dev, ABS_RY, rbuf[1]); + input_report_abs(data->input_dev, ABS_RZ, rbuf[2]); + input_report_abs(data->input_dev, ABS_RUDDER, rbuf[4]); + } + + /* Report acceleration sensor information */ + if (atomic_read(&a_flag)) { + input_report_abs(data->input_dev, ABS_X, rbuf[6]); + input_report_abs(data->input_dev, ABS_Y, rbuf[7]); + input_report_abs(data->input_dev, ABS_Z, rbuf[8]); + input_report_abs(data->input_dev, ABS_WHEEL, rbuf[5]); + } + + /* Report temperature information */ + if (atomic_read(&t_flag)) + input_report_abs(data->input_dev, ABS_THROTTLE, rbuf[3]); + + if (atomic_read(&mv_flag)) { + input_report_abs(data->input_dev, ABS_HAT0X, rbuf[9]); + input_report_abs(data->input_dev, ABS_HAT0Y, rbuf[10]); + input_report_abs(data->input_dev, ABS_BRAKE, rbuf[11]); + } + + input_sync(data->input_dev); +} + +static int AKECS_GetOpenStatus(void) +{ + wait_event_interruptible(open_wq, (atomic_read(&open_flag) != 0)); + return atomic_read(&open_flag); +} + +static int AKECS_GetCloseStatus(void) +{ + wait_event_interruptible(open_wq, (atomic_read(&open_flag) <= 0)); + return atomic_read(&open_flag); +} + +static void AKECS_CloseDone(void) +{ + atomic_set(&m_flag, 1); + atomic_set(&a_flag, 1); + atomic_set(&t_flag, 1); + atomic_set(&mv_flag, 1); +} + +static int akm_aot_open(struct inode *inode, struct file *file) +{ + int ret = -1; + if (atomic_cmpxchg(&open_count, 0, 1) == 0) { + if (atomic_cmpxchg(&open_flag, 0, 1) == 0) { + atomic_set(&reserve_open_flag, 1); + wake_up(&open_wq); + ret = 0; + } + } + return ret; +} + +static int akm_aot_release(struct inode *inode, struct file *file) +{ + atomic_set(&reserve_open_flag, 0); + atomic_set(&open_flag, 0); + atomic_set(&open_count, 0); + wake_up(&open_wq); + return 0; +} + +static int +akm_aot_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + void __user *argp = (void __user *)arg; + short flag; + + switch (cmd) { + case ECS_IOCTL_APP_SET_MFLAG: + case ECS_IOCTL_APP_SET_AFLAG: + case ECS_IOCTL_APP_SET_TFLAG: + case ECS_IOCTL_APP_SET_MVFLAG: + if (copy_from_user(&flag, argp, sizeof(flag))) + return -EFAULT; + if (flag < 0 || flag > 1) + return -EINVAL; + break; + case ECS_IOCTL_APP_SET_DELAY: + if (copy_from_user(&flag, argp, sizeof(flag))) + return -EFAULT; + break; + default: + break; + } + + switch (cmd) { + case ECS_IOCTL_APP_SET_MFLAG: + atomic_set(&m_flag, flag); + break; + case ECS_IOCTL_APP_GET_MFLAG: + flag = atomic_read(&m_flag); + break; + case ECS_IOCTL_APP_SET_AFLAG: + atomic_set(&a_flag, flag); + break; + case ECS_IOCTL_APP_GET_AFLAG: + flag = atomic_read(&a_flag); + break; + case ECS_IOCTL_APP_SET_TFLAG: + atomic_set(&t_flag, flag); + break; + case ECS_IOCTL_APP_GET_TFLAG: + flag = atomic_read(&t_flag); + break; + case ECS_IOCTL_APP_SET_MVFLAG: + atomic_set(&mv_flag, flag); + break; + case ECS_IOCTL_APP_GET_MVFLAG: + flag = atomic_read(&mv_flag); + break; + case ECS_IOCTL_APP_SET_DELAY: + akmd_delay = flag; + break; + case ECS_IOCTL_APP_GET_DELAY: + flag = akmd_delay; + break; + default: + return -ENOTTY; + } + + switch (cmd) { + case ECS_IOCTL_APP_GET_MFLAG: + case ECS_IOCTL_APP_GET_AFLAG: + case ECS_IOCTL_APP_GET_TFLAG: + case ECS_IOCTL_APP_GET_MVFLAG: + case ECS_IOCTL_APP_GET_DELAY: + if (copy_to_user(argp, &flag, sizeof(flag))) + return -EFAULT; + break; + default: + break; + } + + return 0; +} + +static int akmd_open(struct inode *inode, struct file *file) +{ + return nonseekable_open(inode, file); +} + +static int akmd_release(struct inode *inode, struct file *file) +{ + AKECS_CloseDone(); + return 0; +} + +static int +akmd_ioctl(struct inode *inode, struct file *file, unsigned int cmd, + unsigned long arg) +{ + + void __user *argp = (void __user *)arg; + + char msg[RBUFF_SIZE + 1], rwbuf[5]; + int ret = -1, status; + short mode, value[12], delay; + + switch (cmd) { + case ECS_IOCTL_WRITE: + case ECS_IOCTL_READ: + if (copy_from_user(&rwbuf, argp, sizeof(rwbuf))) + return -EFAULT; + break; + case ECS_IOCTL_SET_MODE: + if (copy_from_user(&mode, argp, sizeof(mode))) + return -EFAULT; + break; + case ECS_IOCTL_SET_YPR: + if (copy_from_user(&value, argp, sizeof(value))) + return -EFAULT; + break; + default: + break; + } + + switch (cmd) { + case ECS_IOCTL_WRITE: + if (rwbuf[0] < 2) + return -EINVAL; + ret = AKI2C_TxData(&rwbuf[1], rwbuf[0]); + if (ret < 0) + return ret; + break; + case ECS_IOCTL_READ: + if (rwbuf[0] < 1) + return -EINVAL; + ret = AKI2C_RxData(&rwbuf[1], rwbuf[0]); + if (ret < 0) + return ret; + break; + case ECS_IOCTL_SET_MODE: + ret = AKECS_SetMode((char)mode); + if (ret < 0) + return ret; + break; + case ECS_IOCTL_GETDATA: + ret = AKECS_TransRBuff(msg, RBUFF_SIZE); + if (ret < 0) + return ret; + break; + case ECS_IOCTL_SET_YPR: + AKECS_Report_Value(value); + break; + case ECS_IOCTL_GET_OPEN_STATUS: + status = AKECS_GetOpenStatus(); + break; + case ECS_IOCTL_GET_CLOSE_STATUS: + status = AKECS_GetCloseStatus(); + break; + case ECS_IOCTL_GET_DELAY: + delay = akmd_delay; + break; + default: + return -ENOTTY; + } + + switch (cmd) { + case ECS_IOCTL_READ: + if (copy_to_user(argp, &rwbuf, sizeof(rwbuf))) + return -EFAULT; + break; + case ECS_IOCTL_GETDATA: + if (copy_to_user(argp, &msg, sizeof(msg))) + return -EFAULT; + break; + case ECS_IOCTL_GET_OPEN_STATUS: + case ECS_IOCTL_GET_CLOSE_STATUS: + if (copy_to_user(argp, &status, sizeof(status))) + return -EFAULT; + break; + case ECS_IOCTL_GET_DELAY: + if (copy_to_user(argp, &delay, sizeof(delay))) + return -EFAULT; + break; + default: + break; + } + + return 0; +} + +static void akm_work_func(struct work_struct *work) +{ + if (AKECS_GetData() < 0) + printk(KERN_ERR "AKM8973 akm_work_func: Get data failed\n"); + enable_irq(this_client->irq); +} + +static irqreturn_t akm8973_interrupt(int irq, void *dev_id) +{ + struct akm8973_data *data = dev_id; + disable_irq(this_client->irq); + schedule_work(&data->work); + return IRQ_HANDLED; +} +#ifdef CONFIG_HAS_EARLYSUSPEND +static void akm8973_early_suspend(struct early_suspend *handler) +{ + atomic_set(&suspend_flag, 1); + atomic_set(&reserve_open_flag, atomic_read(&open_flag)); + atomic_set(&open_flag, 0); + wake_up(&open_wq); + disable_irq(this_client->irq); +} + +static void akm8973_early_resume(struct early_suspend *handler) +{ + enable_irq(this_client->irq); + atomic_set(&suspend_flag, 0); + atomic_set(&open_flag, atomic_read(&reserve_open_flag)); + wake_up(&open_wq); +} +#endif +static struct file_operations akmd_fops = { + .owner = THIS_MODULE, + .open = akmd_open, + .release = akmd_release, + .ioctl = akmd_ioctl, +}; + +static struct file_operations akm_aot_fops = { + .owner = THIS_MODULE, + .open = akm_aot_open, + .release = akm_aot_release, + .ioctl = akm_aot_ioctl, +}; + + +static struct miscdevice akm_aot_device = { + .minor = MISC_DYNAMIC_MINOR, + .name = "akm8973_aot", + .fops = &akm_aot_fops, +}; + + +static struct miscdevice akmd_device = { + .minor = MISC_DYNAMIC_MINOR, + .name = "akm8973_daemon", + .fops = &akmd_fops, +}; + +static ssize_t compass_reset_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + int val; + + val = -1; + sscanf(buf, "%u", &val); + if (val != 1) + return -EINVAL; + + return count; +} + +static DEVICE_ATTR(reset, 0644, NULL, compass_reset_store); + +int akm8973_probe(struct i2c_client *client, const struct i2c_device_id *id) +{ + struct akm8973_data *akm; + int err = 0; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { + err = -ENODEV; + goto exit_check_functionality_failed; + } + + akm = kzalloc(sizeof(struct akm8973_data), GFP_KERNEL); + if (!akm) { + err = -ENOMEM; + goto exit_alloc_data_failed; + } + + INIT_WORK(&akm->work, akm_work_func); + i2c_set_clientdata(client, akm); + + this_client = client; + + err = AKECS_PowerDown(); + if (err < 0) { + printk(KERN_ERR"AKM8973 akm8973_probe: set power down mode error\n"); + goto exit_set_mode_failed; + } + + err = request_irq(client->irq, akm8973_interrupt, IRQF_TRIGGER_HIGH, + "akm8973", akm); + + if (err < 0) { + printk(KERN_ERR"AKM8973 akm8973_probe: request irq failed\n"); + goto exit_irq_request_failed; + } + + akm->input_dev = input_allocate_device(); + + if (!akm->input_dev) { + err = -ENOMEM; + printk(KERN_ERR + "AKM8973 akm8973_probe: Failed to allocate input device\n"); + goto exit_input_dev_alloc_failed; + } + + set_bit(EV_ABS, akm->input_dev->evbit); + /* yaw */ + input_set_abs_params(akm->input_dev, ABS_RX, 0, 360, 0, 0); + /* pitch */ + input_set_abs_params(akm->input_dev, ABS_RY, -180, 180, 0, 0); + /* roll */ + input_set_abs_params(akm->input_dev, ABS_RZ, -90, 90, 0, 0); + /* x-axis acceleration */ + input_set_abs_params(akm->input_dev, ABS_X, -1872, 1872, 0, 0); + /* y-axis acceleration */ + input_set_abs_params(akm->input_dev, ABS_Y, -1872, 1872, 0, 0); + /* z-axis acceleration */ + input_set_abs_params(akm->input_dev, ABS_Z, -1872, 1872, 0, 0); + /* temparature */ + input_set_abs_params(akm->input_dev, ABS_THROTTLE, -30, 85, 0, 0); + /* status of magnetic sensor */ + input_set_abs_params(akm->input_dev, ABS_RUDDER, -32768, 3, 0, 0); + /* status of acceleration sensor */ + input_set_abs_params(akm->input_dev, ABS_WHEEL, -32768, 3, 0, 0); + /* step count */ + input_set_abs_params(akm->input_dev, ABS_GAS, 0, 65535, 0, 0); + /* x-axis of raw magnetic vector */ + input_set_abs_params(akm->input_dev, ABS_HAT0X, -2048, 2032, 0, 0); + /* y-axis of raw magnetic vector */ + input_set_abs_params(akm->input_dev, ABS_HAT0Y, -2048, 2032, 0, 0); + /* z-axis of raw magnetic vector */ + input_set_abs_params(akm->input_dev, ABS_BRAKE, -2048, 2032, 0, 0); + + akm->input_dev->name = "compass"; + + err = input_register_device(akm->input_dev); + + if (err) { + printk(KERN_ERR + "AKM8973 akm8973_probe: Unable to register input device: %s\n", + akm->input_dev->name); + goto exit_input_register_device_failed; + } + + err = misc_register(&akmd_device); + if (err) { + printk(KERN_ERR "AKM8973 akm8973_probe: akmd_device register failed\n"); + goto exit_misc_device_register_failed; + } + + err = misc_register(&akm_aot_device); + if (err) { + printk(KERN_ERR + "AKM8973 akm8973_probe: akm_aot_device register failed\n"); + goto exit_misc_device_register_failed; + } + + mutex_init(&sense_data_mutex); + + init_waitqueue_head(&data_ready_wq); + init_waitqueue_head(&open_wq); + + /* As default, report all information */ + atomic_set(&m_flag, 1); + atomic_set(&a_flag, 1); + atomic_set(&t_flag, 1); + atomic_set(&mv_flag, 1); +#ifdef CONFIG_HAS_EARLYSUSPEND + akm->early_suspend_akm.suspend = akm8973_early_suspend; + akm->early_suspend_akm.resume = akm8973_early_resume; + register_early_suspend(&akm->early_suspend_akm); +#endif + err = device_create_file(&client->dev, &dev_attr_reset); + if (err) + printk(KERN_ERR + "AKM8973 akm8973_probe: create dev_attr_reset failed\n"); + + return 0; + +exit_misc_device_register_failed: +exit_input_register_device_failed: + input_free_device(akm->input_dev); +exit_input_dev_alloc_failed: + free_irq(client->irq, akm); +exit_irq_request_failed: +exit_set_mode_failed: + kfree(akm); +exit_alloc_data_failed: +exit_check_functionality_failed: + return err; + +} + +static int akm8973_remove(struct i2c_client *client) +{ + struct akm8973_data *akm = i2c_get_clientdata(client); + free_irq(client->irq, akm); + input_unregister_device(akm->input_dev); + kfree(akm); + return 0; +} +static const struct i2c_device_id akm8973_id[] = { + { AKM8973_I2C_NAME, 0 }, + { } +}; + +static struct i2c_driver akm8973_driver = { + .probe = akm8973_probe, + .remove = akm8973_remove, + .id_table = akm8973_id, + .driver = { + .name = AKM8973_I2C_NAME, + }, +}; + +static int __init akm8973_init(void) +{ + printk(KERN_INFO "AKM8973 compass driver: init\n"); + return i2c_add_driver(&akm8973_driver); +} + +static void __exit akm8973_exit(void) +{ + i2c_del_driver(&akm8973_driver); +} + +module_init(akm8973_init); +module_exit(akm8973_exit); + +MODULE_AUTHOR("viral wang "); +MODULE_DESCRIPTION("AKM8973 compass driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/input/magnetometer/ak8973.h b/drivers/input/magnetometer/ak8973.h new file mode 100755 index 000000000000..350eba7dbe6c --- /dev/null +++ b/drivers/input/magnetometer/ak8973.h @@ -0,0 +1,53 @@ +/* + * Definitions for ak8973 compass chip. + */ +#ifndef AKM8973_H +#define AKM8973_H + +#include + +#define AKM8973_I2C_NAME "ak8973" + +/* Compass device dependent definition */ +#define AKECS_MODE_MEASURE 0x00 /* Starts measurement. Please use AKECS_MODE_MEASURE_SNG */ + /* or AKECS_MODE_MEASURE_SEQ instead of this. */ +#define AKECS_MODE_E2P_READ 0x02 /* E2P access mode (read). */ +#define AKECS_MODE_POWERDOWN 0x03 /* Power down mode */ + +#define RBUFF_SIZE 4 /* Rx buffer size */ + +/* AK8973 register address */ +#define AKECS_REG_ST 0xC0 +#define AKECS_REG_TMPS 0xC1 +#define AKECS_REG_MS1 0xE0 + +#define AKMIO 0xA1 + +/* IOCTLs for AKM library */ +#define ECS_IOCTL_WRITE _IOW(AKMIO, 0x01, char[5]) +#define ECS_IOCTL_READ _IOWR(AKMIO, 0x02, char[5]) +#define ECS_IOCTL_RESET _IO(AKMIO, 0x03) +#define ECS_IOCTL_SET_MODE _IOW(AKMIO, 0x04, short) +#define ECS_IOCTL_GETDATA _IOR(AKMIO, 0x05, char[RBUFF_SIZE+1]) +#define ECS_IOCTL_SET_YPR _IOW(AKMIO, 0x06, short[12]) +#define ECS_IOCTL_GET_OPEN_STATUS _IOR(AKMIO, 0x07, int) +#define ECS_IOCTL_GET_CLOSE_STATUS _IOR(AKMIO, 0x08, int) +#define ECS_IOCTL_GET_DELAY _IOR(AKMIO, 0x30, short) + +/* IOCTLs for APPs */ +#define ECS_IOCTL_APP_SET_MODE _IOW(AKMIO, 0x10, short) +#define ECS_IOCTL_APP_SET_MFLAG _IOW(AKMIO, 0x11, short) +#define ECS_IOCTL_APP_GET_MFLAG _IOW(AKMIO, 0x12, short) +#define ECS_IOCTL_APP_SET_AFLAG _IOW(AKMIO, 0x13, short) +#define ECS_IOCTL_APP_GET_AFLAG _IOR(AKMIO, 0x14, short) +#define ECS_IOCTL_APP_SET_TFLAG _IOR(AKMIO, 0x15, short) +#define ECS_IOCTL_APP_GET_TFLAG _IOR(AKMIO, 0x16, short) +#define ECS_IOCTL_APP_RESET_PEDOMETER _IO(AKMIO, 0x17) +#define ECS_IOCTL_APP_SET_DELAY _IOW(AKMIO, 0x18, short) +#define ECS_IOCTL_APP_GET_DELAY ECS_IOCTL_GET_DELAY +#define ECS_IOCTL_APP_SET_MVFLAG _IOW(AKMIO, 0x19, short) /* Set raw magnetic vector flag */ +#define ECS_IOCTL_APP_GET_MVFLAG _IOR(AKMIO, 0x1A, short) /* Get raw magnetic vector flag */ + + +#endif + diff --git a/drivers/input/magnetometer/ak8975.c b/drivers/input/magnetometer/ak8975.c new file mode 100755 index 000000000000..78210a1d9e11 --- /dev/null +++ b/drivers/input/magnetometer/ak8975.c @@ -0,0 +1,910 @@ +/* drivers/i2c/chips/akm8975.c - akm8975 compass driver + * + * Copyright (C) 2007-2008 HTC Corporation. + * Author: Hou-Kun Chen + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + * + */ + +/* + * Revised by AKM 2009/04/02 + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "ak8975.h" + +#define AKM8975_DEBUG 1 +#define AKM8975_DEBUG_MSG 1 +#define AKM8975_DEBUG_FUNC 0 +#define AKM8975_DEBUG_DATA 0 +#define MAX_FAILURE_COUNT 3 +#define AKM8975_RETRY_COUNT 10 +#define AKM8975_DEFAULT_DELAY 100 + +#if AKM8975_DEBUG_MSG +#define AKMDBG(format, ...) printk(KERN_INFO "AKM8975 " format "\n", ## __VA_ARGS__) +#else +#define AKMDBG(format, ...) +#endif + +#if AKM8975_DEBUG_FUNC +#define AKMFUNC(func) printk(KERN_INFO "AKM8975 " func " is called\n") +#else +#define AKMFUNC(func) +#endif + +static struct i2c_client *this_client; + +struct akm8975_data { + struct i2c_client *client; + struct input_dev *input_dev; + struct work_struct work; + struct early_suspend akm_early_suspend; + int eoc_irq; +}; + +/* Addresses to scan -- protected by sense_data_mutex */ +static char sense_data[SENSOR_DATA_SIZE]; +static struct mutex sense_data_mutex; +static DECLARE_WAIT_QUEUE_HEAD(data_ready_wq); +static DECLARE_WAIT_QUEUE_HEAD(open_wq); + +static atomic_t data_ready; +static atomic_t open_count; +static atomic_t open_flag; +static atomic_t reserve_open_flag; + +static atomic_t m_flag; +static atomic_t a_flag; +static atomic_t mv_flag; + +static int failure_count = 0; + +static short akmd_delay = AKM8975_DEFAULT_DELAY; + +static atomic_t suspend_flag = ATOMIC_INIT(0); + +//static struct akm8975_platform_data *pdata; + +static int AKI2C_RxData(char *rxData, int length) +{ + uint8_t loop_i; + struct i2c_msg msgs[] = { + { + .addr = this_client->addr, + .flags = 0, + .len = 1, + .buf = rxData, + }, + { + .addr = this_client->addr, + .flags = I2C_M_RD, + .len = length, + .buf = rxData, + }, + }; +#if AKM8975_DEBUG_DATA + int i; + char addr = rxData[0]; +#endif +#ifdef AKM8975_DEBUG + /* Caller should check parameter validity.*/ + if ((rxData == NULL) || (length < 1)) { + return -EINVAL; + } +#endif + for (loop_i = 0; loop_i < AKM8975_RETRY_COUNT; loop_i++) { + if (i2c_transfer(this_client->adapter, msgs, 2) > 0) { + break; + } + mdelay(10); + } + + if (loop_i >= AKM8975_RETRY_COUNT) { + printk(KERN_ERR "%s retry over %d\n", __func__, AKM8975_RETRY_COUNT); + return -EIO; + } +#if AKM8975_DEBUG_DATA + printk(KERN_INFO "RxData: len=%02x, addr=%02x\n data=", length, addr); + for (i = 0; i < length; i++) { + printk(KERN_INFO " %02x", rxData[i]); + } + printk(KERN_INFO "\n"); +#endif + return 0; +} + +static int AKI2C_TxData(char *txData, int length) +{ + uint8_t loop_i; + struct i2c_msg msg[] = { + { + .addr = this_client->addr, + .flags = 0, + .len = length, + .buf = txData, + }, + }; +#if AKM8975_DEBUG_DATA + int i; +#endif +#ifdef AKM8975_DEBUG + /* Caller should check parameter validity.*/ + if ((txData == NULL) || (length < 2)) { + return -EINVAL; + } +#endif + for (loop_i = 0; loop_i < AKM8975_RETRY_COUNT; loop_i++) { + if (i2c_transfer(this_client->adapter, msg, 1) > 0) { + break; + } + mdelay(10); + } + + if (loop_i >= AKM8975_RETRY_COUNT) { + printk(KERN_ERR "%s retry over %d\n", __func__, AKM8975_RETRY_COUNT); + return -EIO; + } +#if AKM8975_DEBUG_DATA + printk(KERN_INFO "TxData: len=%02x, addr=%02x\n data=", length, txData[0]); + for (i = 0; i < (length-1); i++) { + printk(KERN_INFO " %02x", txData[i + 1]); + } + printk(KERN_INFO "\n"); +#endif + return 0; +} + +static int AKECS_SetMode_SngMeasure(void) +{ + char buffer[2]; + + atomic_set(&data_ready, 0); + + /* Set measure mode */ + buffer[0] = AK8975_REG_CNTL; + buffer[1] = AK8975_MODE_SNG_MEASURE; + + /* Set data */ + return AKI2C_TxData(buffer, 2); +} + +static int AKECS_SetMode_SelfTest(void) +{ + char buffer[2]; + + /* Set measure mode */ + buffer[0] = AK8975_REG_CNTL; + buffer[1] = AK8975_MODE_SELF_TEST; + /* Set data */ + return AKI2C_TxData(buffer, 2); +} + +static int AKECS_SetMode_FUSEAccess(void) +{ + char buffer[2]; + + /* Set measure mode */ + buffer[0] = AK8975_REG_CNTL; + buffer[1] = AK8975_MODE_FUSE_ACCESS; + /* Set data */ + return AKI2C_TxData(buffer, 2); +} + +static int AKECS_SetMode_PowerDown(void) +{ + char buffer[2]; + + /* Set powerdown mode */ + buffer[0] = AK8975_REG_CNTL; + buffer[1] = AK8975_MODE_POWERDOWN; + /* Set data */ + return AKI2C_TxData(buffer, 2); +} + +static int AKECS_SetMode(char mode) +{ + int ret; + + switch (mode) { + case AK8975_MODE_SNG_MEASURE: + ret = AKECS_SetMode_SngMeasure(); + break; + case AK8975_MODE_SELF_TEST: + ret = AKECS_SetMode_SelfTest(); + break; + case AK8975_MODE_FUSE_ACCESS: + ret = AKECS_SetMode_FUSEAccess(); + break; + case AK8975_MODE_POWERDOWN: + ret = AKECS_SetMode_PowerDown(); + /* wait at least 100us after changing mode */ + udelay(100); + break; + default: + AKMDBG("%s: Unknown mode(%d)", __func__, mode); + return -EINVAL; + } + + return ret; +} + +static int AKECS_CheckDevice(void) +{ + char buffer[2]; + int ret; + + /* Set measure mode */ + buffer[0] = AK8975_REG_WIA; + + /* Read data */ + ret = AKI2C_RxData(buffer, 1); + if (ret < 0) { + return ret; + } + /* Check read data */ + if (buffer[0] != 0x48) { + return -ENXIO; + } + + return 0; +} + +static int AKECS_GetData(char *rbuf, int size) +{ +#ifdef AKM8975_DEBUG + /* This function is not exposed, so parameters + should be checked internally.*/ + if ((rbuf == NULL) || (size < SENSOR_DATA_SIZE)) { + return -EINVAL; + } +#endif + wait_event_interruptible_timeout(data_ready_wq, + atomic_read(&data_ready), 1000); + if (!atomic_read(&data_ready)) { + AKMDBG("%s: data_ready is not set.", __func__); + if (!atomic_read(&suspend_flag)) { + AKMDBG("%s: suspend_flag is not set.", __func__); + failure_count++; + if (failure_count >= MAX_FAILURE_COUNT) { + printk(KERN_ERR + "AKM8975 AKECS_GetData: successive %d failure.\n", + failure_count); + atomic_set(&open_flag, -1); + wake_up(&open_wq); + failure_count = 0; + } + } + return -1; + } + + mutex_lock(&sense_data_mutex); + memcpy(rbuf, sense_data, size); + atomic_set(&data_ready, 0); + mutex_unlock(&sense_data_mutex); + + failure_count = 0; + return 0; +} + +static void AKECS_SetYPR(short *rbuf) +{ + struct akm8975_data *data = i2c_get_clientdata(this_client); +#if AKM8975_DEBUG_DATA + printk(KERN_INFO "AKM8975 %s:\n", __func__); + printk(KERN_INFO " yaw =%6d, pitch =%6d, roll =%6d\n", + rbuf[0], rbuf[1], rbuf[2]); + printk(KERN_INFO " tmp =%6d, m_stat =%6d, g_stat =%6d\n", + rbuf[3], rbuf[4], rbuf[5]); + printk(KERN_INFO " Acceleration[LSB]: %6d,%6d,%6d\n", + rbuf[6], rbuf[7], rbuf[8]); + printk(KERN_INFO " Geomagnetism[LSB]: %6d,%6d,%6d\n", + rbuf[9], rbuf[10], rbuf[11]); +#endif + /* Report magnetic sensor information */ + if (atomic_read(&m_flag)) { + input_report_abs(data->input_dev, ABS_RX, rbuf[0]); + input_report_abs(data->input_dev, ABS_RY, rbuf[1]); + input_report_abs(data->input_dev, ABS_RZ, rbuf[2]); + input_report_abs(data->input_dev, ABS_RUDDER, rbuf[4]); + } + + /* Report acceleration sensor information */ + if (atomic_read(&a_flag)) { + input_report_abs(data->input_dev, ABS_X, rbuf[6]); + input_report_abs(data->input_dev, ABS_Y, rbuf[7]); + input_report_abs(data->input_dev, ABS_Z, rbuf[8]); + input_report_abs(data->input_dev, ABS_WHEEL, rbuf[5]); + } + + /* Report magnetic vector information */ + if (atomic_read(&mv_flag)) { + input_report_abs(data->input_dev, ABS_HAT0X, rbuf[9]); + input_report_abs(data->input_dev, ABS_HAT0Y, rbuf[10]); + input_report_abs(data->input_dev, ABS_BRAKE, rbuf[11]); + } + + input_sync(data->input_dev); +} + +static int AKECS_GetOpenStatus(void) +{ + wait_event_interruptible(open_wq, (atomic_read(&open_flag) != 0)); + return atomic_read(&open_flag); +} + +static int AKECS_GetCloseStatus(void) +{ + wait_event_interruptible(open_wq, (atomic_read(&open_flag) <= 0)); + return atomic_read(&open_flag); +} + +static void AKECS_CloseDone(void) +{ + atomic_set(&m_flag, 1); + atomic_set(&a_flag, 1); + atomic_set(&mv_flag, 1); +} + +/***** akm_aot functions ***************************************/ +static int akm_aot_open(struct inode *inode, struct file *file) +{ + int ret = -1; + + AKMFUNC("akm_aot_open"); + if (atomic_cmpxchg(&open_count, 0, 1) == 0) { + if (atomic_cmpxchg(&open_flag, 0, 1) == 0) { + atomic_set(&reserve_open_flag, 1); + wake_up(&open_wq); + ret = 0; + } + } + return ret; +} + +static int akm_aot_release(struct inode *inode, struct file *file) +{ + AKMFUNC("akm_aot_release"); + atomic_set(&reserve_open_flag, 0); + atomic_set(&open_flag, 0); + atomic_set(&open_count, 0); + wake_up(&open_wq); + return 0; +} + +static int +akm_aot_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + void __user *argp = (void __user *)arg; + short flag; + + switch (cmd) { + case ECS_IOCTL_APP_SET_MFLAG: + case ECS_IOCTL_APP_SET_AFLAG: + case ECS_IOCTL_APP_SET_MVFLAG: + if (copy_from_user(&flag, argp, sizeof(flag))) { + return -EFAULT; + } + if (flag < 0 || flag > 1) { + return -EINVAL; + } + break; + case ECS_IOCTL_APP_SET_DELAY: + if (copy_from_user(&flag, argp, sizeof(flag))) { + return -EFAULT; + } + break; + default: + break; + } + + switch (cmd) { + case ECS_IOCTL_APP_SET_MFLAG: + atomic_set(&m_flag, flag); + AKMDBG("MFLAG is set to %d", flag); + break; + case ECS_IOCTL_APP_GET_MFLAG: + flag = atomic_read(&m_flag); + break; + case ECS_IOCTL_APP_SET_AFLAG: + atomic_set(&a_flag, flag); + AKMDBG("AFLAG is set to %d", flag); + break; + case ECS_IOCTL_APP_GET_AFLAG: + flag = atomic_read(&a_flag); + break; + case ECS_IOCTL_APP_SET_MVFLAG: + atomic_set(&mv_flag, flag); + AKMDBG("MVFLAG is set to %d", flag); + break; + case ECS_IOCTL_APP_GET_MVFLAG: + flag = atomic_read(&mv_flag); + break; + case ECS_IOCTL_APP_SET_DELAY: + akmd_delay = flag; + AKMDBG("Delay is set to %d", flag); + break; + case ECS_IOCTL_APP_GET_DELAY: + flag = akmd_delay; + break; + default: + return -ENOTTY; + } + + switch (cmd) { + case ECS_IOCTL_APP_GET_MFLAG: + case ECS_IOCTL_APP_GET_AFLAG: + case ECS_IOCTL_APP_GET_MVFLAG: + case ECS_IOCTL_APP_GET_DELAY: + if (copy_to_user(argp, &flag, sizeof(flag))) { + return -EFAULT; + } + break; + default: + break; + } + + return 0; +} + +/***** akmd functions ********************************************/ +static int akmd_open(struct inode *inode, struct file *file) +{ + AKMFUNC("akmd_open"); + return nonseekable_open(inode, file); +} + +static int akmd_release(struct inode *inode, struct file *file) +{ + AKMFUNC("akmd_release"); + AKECS_CloseDone(); + return 0; +} + +static int +akmd_ioctl(struct inode *inode, struct file *file, unsigned int cmd, + unsigned long arg) +{ + void __user *argp = (void __user *)arg; + + /* NOTE: In this function the size of "char" should be 1-byte. */ + char sData[SENSOR_DATA_SIZE];/* for GETDATA */ + char rwbuf[RWBUF_SIZE]; /* for READ/WRITE */ + char mode; /* for SET_MODE*/ + short value[12]; /* for SET_YPR */ + short delay; /* for GET_DELAY */ + int status; /* for OPEN/CLOSE_STATUS */ + int ret = -1; /* Return value. */ + /*AKMDBG("%s (0x%08X).", __func__, cmd);*/ + + switch (cmd) { + case ECS_IOCTL_WRITE: + case ECS_IOCTL_READ: + if (argp == NULL) { + AKMDBG("invalid argument."); + return -EINVAL; + } + if (copy_from_user(&rwbuf, argp, sizeof(rwbuf))) { + AKMDBG("copy_from_user failed."); + return -EFAULT; + } + break; + case ECS_IOCTL_SET_MODE: + if (argp == NULL) { + AKMDBG("invalid argument."); + return -EINVAL; + } + if (copy_from_user(&mode, argp, sizeof(mode))) { + AKMDBG("copy_from_user failed."); + return -EFAULT; + } + break; + case ECS_IOCTL_SET_YPR: + if (argp == NULL) { + AKMDBG("invalid argument."); + return -EINVAL; + } + if (copy_from_user(&value, argp, sizeof(value))) { + AKMDBG("copy_from_user failed."); + return -EFAULT; + } + break; + default: + break; + } + + switch (cmd) { + case ECS_IOCTL_WRITE: + AKMFUNC("IOCTL_WRITE"); + if ((rwbuf[0] < 2) || (rwbuf[0] > (RWBUF_SIZE-1))) { + AKMDBG("invalid argument."); + return -EINVAL; + } + ret = AKI2C_TxData(&rwbuf[1], rwbuf[0]); + if (ret < 0) { + return ret; + } + break; + case ECS_IOCTL_READ: + AKMFUNC("IOCTL_READ"); + if ((rwbuf[0] < 1) || (rwbuf[0] > (RWBUF_SIZE-1))) { + AKMDBG("invalid argument."); + return -EINVAL; + } + ret = AKI2C_RxData(&rwbuf[1], rwbuf[0]); + if (ret < 0) { + return ret; + } + break; + case ECS_IOCTL_SET_MODE: + AKMFUNC("IOCTL_SET_MODE"); + ret = AKECS_SetMode(mode); + if (ret < 0) { + return ret; + } + break; + case ECS_IOCTL_GETDATA: + AKMFUNC("IOCTL_GET_DATA"); + ret = AKECS_GetData(sData, SENSOR_DATA_SIZE); + if (ret < 0) { + return ret; + } + break; + case ECS_IOCTL_SET_YPR: + AKECS_SetYPR(value); + break; + case ECS_IOCTL_GET_OPEN_STATUS: + AKMFUNC("IOCTL_GET_OPEN_STATUS"); + status = AKECS_GetOpenStatus(); + AKMDBG("AKECS_GetOpenStatus returned (%d)", status); + break; + case ECS_IOCTL_GET_CLOSE_STATUS: + AKMFUNC("IOCTL_GET_CLOSE_STATUS"); + status = AKECS_GetCloseStatus(); + AKMDBG("AKECS_GetCloseStatus returned (%d)", status); + break; + case ECS_IOCTL_GET_DELAY: + AKMFUNC("IOCTL_GET_DELAY"); + delay = akmd_delay; + break; + default: + return -ENOTTY; + } + + switch (cmd) { + case ECS_IOCTL_READ: + if (copy_to_user(argp, &rwbuf, rwbuf[0]+1)) { + AKMDBG("copy_to_user failed."); + return -EFAULT; + } + break; + case ECS_IOCTL_GETDATA: + if (copy_to_user(argp, &sData, sizeof(sData))) { + AKMDBG("copy_to_user failed."); + return -EFAULT; + } + break; + case ECS_IOCTL_GET_OPEN_STATUS: + case ECS_IOCTL_GET_CLOSE_STATUS: + if (copy_to_user(argp, &status, sizeof(status))) { + AKMDBG("copy_to_user failed."); + return -EFAULT; + } + break; + case ECS_IOCTL_GET_DELAY: + if (copy_to_user(argp, &delay, sizeof(delay))) { + AKMDBG("copy_to_user failed."); + return -EFAULT; + } + break; + default: + break; + } + + return 0; +} + +static void akm8975_work_func(struct work_struct *work) +{ + char buffer[SENSOR_DATA_SIZE]; + int ret; + + memset(buffer, 0, SENSOR_DATA_SIZE); + buffer[0] = AK8975_REG_ST1; + ret = AKI2C_RxData(buffer, SENSOR_DATA_SIZE); + if (ret < 0) { + printk(KERN_ERR "AKM8975 akm8975_work_func: I2C failed\n"); + return; + } + /* Check ST bit */ + if ((buffer[0] & 0x01) != 0x01) { + printk(KERN_ERR "AKM8975 akm8975_work_func: ST is not set\n"); + return; + } + + mutex_lock(&sense_data_mutex); + memcpy(sense_data, buffer, SENSOR_DATA_SIZE); + atomic_set(&data_ready, 1); + wake_up(&data_ready_wq); + mutex_unlock(&sense_data_mutex); + + enable_irq(this_client->irq); + + AKMFUNC("akm8975_work_func"); +} + +static irqreturn_t akm8975_interrupt(int irq, void *dev_id) +{ + struct akm8975_data *data = dev_id; + AKMFUNC("akm8975_interrupt"); + disable_irq(this_client->irq); + schedule_work(&data->work); + return IRQ_HANDLED; +} + +static void akm8975_early_suspend(struct early_suspend *handler) +{ + AKMFUNC("akm8975_early_suspend"); + atomic_set(&suspend_flag, 1); + atomic_set(&reserve_open_flag, atomic_read(&open_flag)); + atomic_set(&open_flag, 0); + wake_up(&open_wq); + disable_irq(this_client->irq); + AKMDBG("suspended with flag=%d", + atomic_read(&reserve_open_flag)); +} + +static void akm8975_early_resume(struct early_suspend *handler) +{ + AKMFUNC("akm8975_early_resume"); + enable_irq(this_client->irq); + atomic_set(&suspend_flag, 0); + atomic_set(&open_flag, atomic_read(&reserve_open_flag)); + wake_up(&open_wq); + AKMDBG("resumed with flag=%d", + atomic_read(&reserve_open_flag)); +} + +/*********************************************/ +static struct file_operations akmd_fops = { + .owner = THIS_MODULE, + .open = akmd_open, + .release = akmd_release, + .ioctl = akmd_ioctl, +}; + +static struct file_operations akm_aot_fops = { + .owner = THIS_MODULE, + .open = akm_aot_open, + .release = akm_aot_release, + .ioctl = akm_aot_ioctl, +}; + +static struct miscdevice akmd_device = { + .minor = MISC_DYNAMIC_MINOR, + .name = "akm8975_dev", + .fops = &akmd_fops, +}; + +static struct miscdevice akm_aot_device = { + .minor = MISC_DYNAMIC_MINOR, + .name = "akm8975_aot", + .fops = &akm_aot_fops, +}; + +/*********************************************/ +int akm8975_probe(struct i2c_client *client, const struct i2c_device_id *id) +{ + struct akm8975_data *akm; + int err = 0; + + AKMFUNC("akm8975_probe"); + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { + printk(KERN_ERR "AKM8975 akm8975_probe: check_functionality failed.\n"); + err = -ENODEV; + goto exit0; + } + + /* Allocate memory for driver data */ + akm = kzalloc(sizeof(struct akm8975_data), GFP_KERNEL); + if (!akm) { + printk(KERN_ERR "AKM8975 akm8975_probe: memory allocation failed.\n"); + err = -ENOMEM; + goto exit1; + } + + INIT_WORK(&akm->work, akm8975_work_func); + i2c_set_clientdata(client, akm); + + this_client = client; + + /* Check connection */ + err = AKECS_CheckDevice(); + if (err < 0) { + printk(KERN_ERR "AKM8975 akm8975_probe: set power down mode error\n"); + goto exit3; + } + akm->eoc_irq = client->irq; + if (!akm->eoc_irq) { + dev_dbg(&akm->client->dev, "no IRQ?\n"); + return -ENODEV; + }else{ + akm->eoc_irq = gpio_to_irq(akm->eoc_irq); + } + err = gpio_request(client->irq, "ak_8975"); + if (err < 0) { + dev_err(&client->dev, "failed to request GPIO, error %d\n", err); + goto exit3; + } + /* IRQ */ + err = request_irq(akm->eoc_irq, akm8975_interrupt, IRQ_TYPE_EDGE_RISING, + "akm8975_DRDY", akm); + if (err < 0) { + printk(KERN_ERR "AKM8975 akm8975_probe: request irq failed\n"); + goto exit4; + } + + /* Declare input device */ + akm->input_dev = input_allocate_device(); + if (!akm->input_dev) { + err = -ENOMEM; + printk(KERN_ERR + "AKM8975 akm8975_probe: Failed to allocate input device\n"); + goto exit5; + } + /* Setup input device */ + set_bit(EV_ABS, akm->input_dev->evbit); + /* yaw (0, 360) */ + input_set_abs_params(akm->input_dev, ABS_RX, 0, 23040, 0, 0); + /* pitch (-180, 180) */ + input_set_abs_params(akm->input_dev, ABS_RY, -11520, 11520, 0, 0); + /* roll (-90, 90) */ + input_set_abs_params(akm->input_dev, ABS_RZ, -5760, 5760, 0, 0); + /* x-axis acceleration (720 x 8G) */ + input_set_abs_params(akm->input_dev, ABS_X, -5760, 5760, 0, 0); + /* y-axis acceleration (720 x 8G) */ + input_set_abs_params(akm->input_dev, ABS_Y, -5760, 5760, 0, 0); + /* z-axis acceleration (720 x 8G) */ + input_set_abs_params(akm->input_dev, ABS_Z, -5760, 5760, 0, 0); + /* temparature */ + /* + input_set_abs_params(akm->input_dev, ABS_THROTTLE, -30, 85, 0, 0); + */ + /* status of magnetic sensor */ + input_set_abs_params(akm->input_dev, ABS_RUDDER, -32768, 3, 0, 0); + /* status of acceleration sensor */ + input_set_abs_params(akm->input_dev, ABS_WHEEL, -32768, 3, 0, 0); + /* x-axis of raw magnetic vector (-4096, 4095) */ + input_set_abs_params(akm->input_dev, ABS_HAT0X, -20480, 20479, 0, 0); + /* y-axis of raw magnetic vector (-4096, 4095) */ + input_set_abs_params(akm->input_dev, ABS_HAT0Y, -20480, 20479, 0, 0); + /* z-axis of raw magnetic vector (-4096, 4095) */ + input_set_abs_params(akm->input_dev, ABS_BRAKE, -20480, 20479, 0, 0); + /* Set name */ + akm->input_dev->name = "compass"; + + /* Register */ + err = input_register_device(akm->input_dev); + if (err) { + printk(KERN_ERR + "AKM8975 akm8975_probe: Unable to register input device\n"); + goto exit6; + } + + err = misc_register(&akmd_device); + if (err) { + printk(KERN_ERR + "AKM8975 akm8975_probe: akmd_device register failed\n"); + goto exit7; + } + + err = misc_register(&akm_aot_device); + if (err) { + printk(KERN_ERR + "AKM8975 akm8975_probe: akm_aot_device register failed\n"); + goto exit8; + } + + mutex_init(&sense_data_mutex); + + init_waitqueue_head(&data_ready_wq); + init_waitqueue_head(&open_wq); + + /* As default, report all information */ + atomic_set(&m_flag, 1); + atomic_set(&a_flag, 1); + atomic_set(&mv_flag, 1); + + akm->akm_early_suspend.suspend = akm8975_early_suspend; + akm->akm_early_suspend.resume = akm8975_early_resume; + register_early_suspend(&akm->akm_early_suspend); + + AKMDBG("successfully probed."); + return 0; + +exit8: + misc_deregister(&akmd_device); +exit7: + input_unregister_device(akm->input_dev); +exit6: + input_free_device(akm->input_dev); +exit5: + free_irq(client->irq, akm); +exit4: +exit3: + kfree(akm); +exit1: +exit0: + return err; + +} + +static int akm8975_remove(struct i2c_client *client) +{ + struct akm8975_data *akm = i2c_get_clientdata(client); + AKMFUNC("akm8975_remove"); + unregister_early_suspend(&akm->akm_early_suspend); + misc_deregister(&akm_aot_device); + misc_deregister(&akmd_device); + input_unregister_device(akm->input_dev); + free_irq(client->irq, akm); + kfree(akm); + AKMDBG("successfully removed."); + return 0; +} + +static const struct i2c_device_id akm8975_id[] = { + {AKM8975_I2C_NAME, 0 }, + { } +}; + +static struct i2c_driver akm8975_driver = { + .probe = akm8975_probe, + .remove = akm8975_remove, + .id_table = akm8975_id, + .driver = { + .name = AKM8975_I2C_NAME, + }, +}; + +static int __init akm8975_init(void) +{ + printk(KERN_INFO "AKM8975 compass driver: initialize\n"); + return i2c_add_driver(&akm8975_driver); +} + +static void __exit akm8975_exit(void) +{ + printk(KERN_INFO "AKM8975 compass driver: release\n"); + i2c_del_driver(&akm8975_driver); +} + +module_init(akm8975_init); +module_exit(akm8975_exit); + +MODULE_AUTHOR("viral wang "); +MODULE_DESCRIPTION("AKM8975 compass driver"); +MODULE_LICENSE("GPL"); + diff --git a/drivers/input/magnetometer/ak8975.h b/drivers/input/magnetometer/ak8975.h new file mode 100755 index 000000000000..dd6628552d18 --- /dev/null +++ b/drivers/input/magnetometer/ak8975.h @@ -0,0 +1,86 @@ +/* + * Definitions for akm8975 compass chip. + */ +#ifndef AKM8975_H +#define AKM8975_H + +#include + +#define AKM8975_I2C_NAME "ak8975" + +/*! \name AK8975 operation mode + \anchor AK8975_Mode + Defines an operation mode of the AK8975.*/ +/*! @{*/ +#define AK8975_MODE_SNG_MEASURE 0x01 +#define AK8975_MODE_SELF_TEST 0x08 +#define AK8975_MODE_FUSE_ACCESS 0x0F +#define AK8975_MODE_POWERDOWN 0x00 +/*! @}*/ + +#define SENSOR_DATA_SIZE 8 /* Rx buffer size, i.e from ST1 to ST2 */ +#define RWBUF_SIZE 16 /* Read/Write buffer size.*/ + + +/*! \name AK8975 register address +\anchor AK8975_REG +Defines a register address of the AK8975.*/ +/*! @{*/ +#define AK8975_REG_WIA 0x00 +#define AK8975_REG_INFO 0x01 +#define AK8975_REG_ST1 0x02 +#define AK8975_REG_HXL 0x03 +#define AK8975_REG_HXH 0x04 +#define AK8975_REG_HYL 0x05 +#define AK8975_REG_HYH 0x06 +#define AK8975_REG_HZL 0x07 +#define AK8975_REG_HZH 0x08 +#define AK8975_REG_ST2 0x09 +#define AK8975_REG_CNTL 0x0A +#define AK8975_REG_RSV 0x0B +#define AK8975_REG_ASTC 0x0C +#define AK8975_REG_TS1 0x0D +#define AK8975_REG_TS2 0x0E +#define AK8975_REG_I2CDIS 0x0F +/*! @}*/ + +/*! \name AK8975 fuse-rom address +\anchor AK8975_FUSE +Defines a read-only address of the fuse ROM of the AK8975.*/ +/*! @{*/ +#define AK8975_FUSE_ASAX 0x10 +#define AK8975_FUSE_ASAY 0x11 +#define AK8975_FUSE_ASAZ 0x12 +/*! @}*/ + +#define AKMIO 0xA1 + +/* IOCTLs for AKM library */ +#define ECS_IOCTL_WRITE _IOW(AKMIO, 0x01, char*) +#define ECS_IOCTL_READ _IOWR(AKMIO, 0x02, char*) +#define ECS_IOCTL_RESET _IO(AKMIO, 0x03) /* NOT used in AK8975 */ +#define ECS_IOCTL_SET_MODE _IOW(AKMIO, 0x04, short) +#define ECS_IOCTL_GETDATA _IOR(AKMIO, 0x05, char[SENSOR_DATA_SIZE]) +#define ECS_IOCTL_SET_YPR _IOW(AKMIO, 0x06, short[12]) +#define ECS_IOCTL_GET_OPEN_STATUS _IOR(AKMIO, 0x07, int) +#define ECS_IOCTL_GET_CLOSE_STATUS _IOR(AKMIO, 0x08, int) +#define ECS_IOCTL_GET_DELAY _IOR(AKMIO, 0x30, short) +#define ECS_IOCTL_GET_PROJECT_NAME _IOR(AKMIO, 0x0D, char[64]) +#define ECS_IOCTL_GET_MATRIX _IOR(AKMIO, 0x0E, short [4][3][3]) + +/* IOCTLs for APPs */ +#define ECS_IOCTL_APP_SET_MODE _IOW(AKMIO, 0x10, short) +#define ECS_IOCTL_APP_SET_MFLAG _IOW(AKMIO, 0x11, short) +#define ECS_IOCTL_APP_GET_MFLAG _IOW(AKMIO, 0x12, short) +#define ECS_IOCTL_APP_SET_AFLAG _IOW(AKMIO, 0x13, short) +#define ECS_IOCTL_APP_GET_AFLAG _IOR(AKMIO, 0x14, short) +#define ECS_IOCTL_APP_SET_TFLAG _IOR(AKMIO, 0x15, short)/* NOT use */ +#define ECS_IOCTL_APP_GET_TFLAG _IOR(AKMIO, 0x16, short)/* NOT use */ +#define ECS_IOCTL_APP_RESET_PEDOMETER _IO(AKMIO, 0x17) /* NOT use */ +#define ECS_IOCTL_APP_SET_DELAY _IOW(AKMIO, 0x18, short) +#define ECS_IOCTL_APP_GET_DELAY ECS_IOCTL_GET_DELAY +#define ECS_IOCTL_APP_SET_MVFLAG _IOW(AKMIO, 0x19, short) +#define ECS_IOCTL_APP_GET_MVFLAG _IOR(AKMIO, 0x1A, short) + +#endif + diff --git a/drivers/input/magnetometer/magnet.h b/drivers/input/magnetometer/magnet.h new file mode 100755 index 000000000000..64338301f8df --- /dev/null +++ b/drivers/input/magnetometer/magnet.h @@ -0,0 +1,31 @@ + +#include "../sysfs.h" + +/* Magnetometer types of attribute */ + +#define IIO_DEV_ATTR_MAGN_X_OFFSET(_mode, _show, _store, _addr) \ + IIO_DEVICE_ATTR(magn_x_offset, _mode, _show, _store, _addr) + +#define IIO_DEV_ATTR_MAGN_Y_OFFSET(_mode, _show, _store, _addr) \ + IIO_DEVICE_ATTR(magn_y_offset, _mode, _show, _store, _addr) + +#define IIO_DEV_ATTR_MAGN_Z_OFFSET(_mode, _show, _store, _addr) \ + IIO_DEVICE_ATTR(magn_z_offset, _mode, _show, _store, _addr) + +#define IIO_DEV_ATTR_MAGN_X_GAIN(_mode, _show, _store, _addr) \ + IIO_DEVICE_ATTR(magn_x_gain, _mode, _show, _store, _addr) + +#define IIO_DEV_ATTR_MAGN_Y_GAIN(_mode, _show, _store, _addr) \ + IIO_DEVICE_ATTR(magn_y_gain, _mode, _show, _store, _addr) + +#define IIO_DEV_ATTR_MAGN_Z_GAIN(_mode, _show, _store, _addr) \ + IIO_DEVICE_ATTR(magn_z_gain, _mode, _show, _store, _addr) + +#define IIO_DEV_ATTR_MAGN_X(_show, _addr) \ + IIO_DEVICE_ATTR(magn_x_raw, S_IRUGO, _show, NULL, _addr) + +#define IIO_DEV_ATTR_MAGN_Y(_show, _addr) \ + IIO_DEVICE_ATTR(magn_y_raw, S_IRUGO, _show, NULL, _addr) + +#define IIO_DEV_ATTR_MAGN_Z(_show, _addr) \ + IIO_DEVICE_ATTR(magn_z_raw, S_IRUGO, _show, NULL, _addr) -- 2.34.1