diff options
Diffstat (limited to 'drivers/misc/inv_mpu/accel/mma8450.c')
| -rw-r--r-- | drivers/misc/inv_mpu/accel/mma8450.c | 804 |
1 files changed, 0 insertions, 804 deletions
diff --git a/drivers/misc/inv_mpu/accel/mma8450.c b/drivers/misc/inv_mpu/accel/mma8450.c deleted file mode 100644 index f698ee9..0000000 --- a/drivers/misc/inv_mpu/accel/mma8450.c +++ /dev/null @@ -1,804 +0,0 @@ -/* - $License: - Copyright (C) 2011 InvenSense Corporation, All Rights Reserved. - - 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, see <http://www.gnu.org/licenses/>. - $ - */ - -/** - * @addtogroup ACCELDL - * @brief Provides the interface to setup and handle an accelerometer. - * - * @{ - * @file mma8450.c - * @brief Accelerometer setup and handling methods for Freescale MMA8450. - */ - -/* -------------------------------------------------------------------------- */ - -#include <linux/i2c.h> -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/slab.h> -#include <linux/delay.h> -#include "mpu-dev.h" - -#include <log.h> -#include <linux/mpu.h> -#include "mlsl.h" -#include "mldl_cfg.h" -#undef MPL_LOG_TAG -#define MPL_LOG_TAG "MPL-acc" - -/* full scale setting - register & mask */ -#define ACCEL_MMA8450_XYZ_DATA_CFG (0x16) - -#define ACCEL_MMA8450_CTRL_REG1 (0x38) -#define ACCEL_MMA8450_CTRL_REG2 (0x39) -#define ACCEL_MMA8450_CTRL_REG4 (0x3B) -#define ACCEL_MMA8450_CTRL_REG5 (0x3C) - -#define ACCEL_MMA8450_CTRL_REG (0x38) -#define ACCEL_MMA8450_CTRL_MASK (0x03) - -#define ACCEL_MMA8450_SLEEP_MASK (0x03) - -/* -------------------------------------------------------------------------- */ - -struct mma8450_config { - unsigned int odr; - unsigned int fsr; /** < full scale range mg */ - unsigned int ths; /** < Motion no-motion thseshold mg */ - unsigned int dur; /** < Motion no-motion duration ms */ - unsigned char reg_ths; - unsigned char reg_dur; - unsigned char ctrl_reg1; - unsigned char irq_type; - unsigned char mot_int1_cfg; -}; - -struct mma8450_private_data { - struct mma8450_config suspend; - struct mma8450_config resume; -}; - - -/* -------------------------------------------------------------------------- */ - -static int mma8450_set_ths(void *mlsl_handle, - struct ext_slave_platform_data *pdata, - struct mma8450_config *config, - int apply, - long ths) -{ - return INV_ERROR_FEATURE_NOT_IMPLEMENTED; -} - -static int mma8450_set_dur(void *mlsl_handle, - struct ext_slave_platform_data *pdata, - struct mma8450_config *config, - int apply, - long dur) -{ - return INV_ERROR_FEATURE_NOT_IMPLEMENTED; -} - -/** - * @brief Sets the IRQ to fire when one of the IRQ events occur. - * Threshold and duration will not be used unless the type is MOT or - * NMOT. - * - * @param mlsl_handle - * the handle to the serial channel the device is connected to. - * @param pdata - * a pointer to the slave platform data. - * @param config - * configuration to apply to, suspend or resume - * @param apply - * whether to apply immediately or save the settings to be applied - * at the next resume. - * @param irq_type - * the type of IRQ. Valid values are - * - MPU_SLAVE_IRQ_TYPE_NONE - * - MPU_SLAVE_IRQ_TYPE_MOTION - * - MPU_SLAVE_IRQ_TYPE_DATA_READY - * - * @return INV_SUCCESS if successful or a non-zero error code. - */ -static int mma8450_set_irq(void *mlsl_handle, - struct ext_slave_platform_data *pdata, - struct mma8450_config *config, - int apply, - long irq_type) -{ - int result = INV_SUCCESS; - unsigned char reg1; - unsigned char reg2; - unsigned char reg3; - - config->irq_type = (unsigned char)irq_type; - if (irq_type == MPU_SLAVE_IRQ_TYPE_DATA_READY) { - reg1 = 0x01; - reg2 = 0x01; - reg3 = 0x07; - } else if (irq_type == MPU_SLAVE_IRQ_TYPE_NONE) { - reg1 = 0x00; - reg2 = 0x00; - reg3 = 0x00; - } else { - return INV_ERROR_FEATURE_NOT_IMPLEMENTED; - } - - if (apply) { - /* XYZ_DATA_CFG: event flag enabled on Z axis */ - result = inv_serial_single_write(mlsl_handle, pdata->address, - ACCEL_MMA8450_XYZ_DATA_CFG, reg3); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - result = inv_serial_single_write(mlsl_handle, pdata->address, - ACCEL_MMA8450_CTRL_REG4, reg1); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - result = inv_serial_single_write(mlsl_handle, pdata->address, - ACCEL_MMA8450_CTRL_REG5, reg2); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - } - - return result; -} - -/** - * @brief Set the output data rate for the particular configuration. - * - * @param mlsl_handle - * the handle to the serial channel the device is connected to. - * @param pdata - * a pointer to the slave platform data. - * @param config - * Config to modify with new ODR. - * @param apply - * whether to apply immediately or save the settings to be applied - * at the next resume. - * @param odr - * Output data rate in units of 1/1000Hz (mHz). - * - * @return INV_SUCCESS if successful or a non-zero error code. - */ -static int mma8450_set_odr(void *mlsl_handle, - struct ext_slave_platform_data *pdata, - struct mma8450_config *config, - int apply, - long odr) -{ - unsigned char bits; - int result = INV_SUCCESS; - - if (odr > 200000) { - config->odr = 400000; - bits = 0x00; - } else if (odr > 100000) { - config->odr = 200000; - bits = 0x04; - } else if (odr > 50000) { - config->odr = 100000; - bits = 0x08; - } else if (odr > 25000) { - config->odr = 50000; - bits = 0x0C; - } else if (odr > 12500) { - config->odr = 25000; - bits = 0x40; /* Sleep -> Auto wake mode */ - } else if (odr > 1563) { - config->odr = 12500; - bits = 0x10; - } else if (odr > 0) { - config->odr = 1563; - bits = 0x14; - } else { - config->ctrl_reg1 = 0; /* Set FS1.FS2 to Standby */ - config->odr = 0; - bits = 0; - } - - config->ctrl_reg1 = bits | (config->ctrl_reg1 & 0x3); - if (apply) { - result = inv_serial_single_write(mlsl_handle, pdata->address, - ACCEL_MMA8450_CTRL_REG1, 0); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - result = inv_serial_single_write(mlsl_handle, pdata->address, - ACCEL_MMA8450_CTRL_REG1, config->ctrl_reg1); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - MPL_LOGV("ODR: %d mHz, 0x%02x\n", - config->odr, (int)config->ctrl_reg1); - } - return result; -} - -/** - * @brief Set the full scale range of the accels - * - * @param mlsl_handle - * the handle to the serial channel the device is connected to. - * @param pdata - * a pointer to the slave platform data. - * @param config - * pointer to configuration. - * @param apply - * whether to apply immediately or save the settings to be applied - * at the next resume. - * @param fsr - * requested full scale range. - * - * @return INV_SUCCESS if successful or a non-zero error code. - */ -static int mma8450_set_fsr(void *mlsl_handle, - struct ext_slave_platform_data *pdata, - struct mma8450_config *config, - int apply, - long fsr) -{ - unsigned char bits; - int result = INV_SUCCESS; - - if (fsr <= 2000) { - bits = 0x01; - config->fsr = 2000; - } else if (fsr <= 4000) { - bits = 0x02; - config->fsr = 4000; - } else { - bits = 0x03; - config->fsr = 8000; - } - - config->ctrl_reg1 = bits | (config->ctrl_reg1 & 0xFC); - if (apply) { - result = inv_serial_single_write(mlsl_handle, pdata->address, - ACCEL_MMA8450_CTRL_REG1, config->ctrl_reg1); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - MPL_LOGV("FSR: %d mg\n", config->fsr); - } - return result; -} - -/** - * @brief suspends the device to put it in its lowest power mode. - * - * @param mlsl_handle - * the handle to the serial channel the device is connected to. - * @param slave - * a pointer to the slave descriptor data structure. - * @param pdata - * a pointer to the slave platform data. - * - * @return INV_SUCCESS if successful or a non-zero error code. - */ -static int mma8450_suspend(void *mlsl_handle, - struct ext_slave_descr *slave, - struct ext_slave_platform_data *pdata) -{ - int result; - struct mma8450_private_data *private_data = pdata->private_data; - - if (private_data->suspend.fsr == 4000) - slave->range.mantissa = 4; - else if (private_data->suspend.fsr == 8000) - slave->range.mantissa = 8; - else - slave->range.mantissa = 2; - slave->range.fraction = 0; - - result = inv_serial_single_write(mlsl_handle, pdata->address, - ACCEL_MMA8450_CTRL_REG1, 0); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - if (private_data->suspend.ctrl_reg1) { - result = inv_serial_single_write(mlsl_handle, pdata->address, - ACCEL_MMA8450_CTRL_REG1, - private_data->suspend.ctrl_reg1); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - } - - result = mma8450_set_irq(mlsl_handle, pdata, - &private_data->suspend, - true, private_data->suspend.irq_type); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - return result; -} - -/** - * @brief resume the device in the proper power state given the configuration - * chosen. - * - * @param mlsl_handle - * the handle to the serial channel the device is connected to. - * @param slave - * a pointer to the slave descriptor data structure. - * @param pdata - * a pointer to the slave platform data. - * - * @return INV_SUCCESS if successful or a non-zero error code. - */ -static int mma8450_resume(void *mlsl_handle, - struct ext_slave_descr *slave, - struct ext_slave_platform_data *pdata) -{ - int result = INV_SUCCESS; - struct mma8450_private_data *private_data = pdata->private_data; - - /* Full Scale */ - if (private_data->resume.fsr == 4000) - slave->range.mantissa = 4; - else if (private_data->resume.fsr == 8000) - slave->range.mantissa = 8; - else - slave->range.mantissa = 2; - slave->range.fraction = 0; - - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - result = inv_serial_single_write(mlsl_handle, pdata->address, - ACCEL_MMA8450_CTRL_REG1, 0); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - if (private_data->resume.ctrl_reg1) { - result = inv_serial_single_write(mlsl_handle, pdata->address, - ACCEL_MMA8450_CTRL_REG1, - private_data->resume.ctrl_reg1); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - } - result = mma8450_set_irq(mlsl_handle, pdata, - &private_data->resume, - true, private_data->resume.irq_type); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - - return result; -} - -/** - * @brief read the sensor data from the device. - * - * @param mlsl_handle - * the handle to the serial channel the device is connected to. - * @param slave - * a pointer to the slave descriptor data structure. - * @param pdata - * a pointer to the slave platform data. - * @param data - * a buffer to store the data read. - * - * @return INV_SUCCESS if successful or a non-zero error code. - */ -static int mma8450_read(void *mlsl_handle, - struct ext_slave_descr *slave, - struct ext_slave_platform_data *pdata, unsigned char *data) -{ - int result; - unsigned char local_data[4]; /* Status register + 3 bytes data */ - result = inv_serial_read(mlsl_handle, pdata->address, - 0x00, sizeof(local_data), local_data); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - memcpy(data, &local_data[1], (slave->read_len) - 1); - - MPL_LOGV("Data Not Ready: %02x %02x %02x %02x\n", - local_data[0], local_data[1], - local_data[2], local_data[3]); - - return result; -} - -/** - * @brief one-time device driver initialization function. - * If the driver is built as a kernel module, this function will be - * called when the module is loaded in the kernel. - * If the driver is built-in in the kernel, this function will be - * called at boot time. - * - * @param mlsl_handle - * the handle to the serial channel the device is connected to. - * @param slave - * a pointer to the slave descriptor data structure. - * @param pdata - * a pointer to the slave platform data. - * - * @return INV_SUCCESS if successful or a non-zero error code. - */ -static int mma8450_init(void *mlsl_handle, - struct ext_slave_descr *slave, - struct ext_slave_platform_data *pdata) -{ - struct mma8450_private_data *private_data; - private_data = (struct mma8450_private_data *) - kzalloc(sizeof(struct mma8450_private_data), GFP_KERNEL); - - if (!private_data) - return INV_ERROR_MEMORY_EXAUSTED; - - pdata->private_data = private_data; - - mma8450_set_odr(mlsl_handle, pdata, &private_data->suspend, - false, 0); - mma8450_set_odr(mlsl_handle, pdata, &private_data->resume, - false, 200000); - mma8450_set_fsr(mlsl_handle, pdata, &private_data->suspend, - false, 2000); - mma8450_set_fsr(mlsl_handle, pdata, &private_data->resume, - false, 2000); - mma8450_set_irq(mlsl_handle, pdata, &private_data->suspend, - false, - MPU_SLAVE_IRQ_TYPE_NONE); - mma8450_set_irq(mlsl_handle, pdata, &private_data->resume, - false, - MPU_SLAVE_IRQ_TYPE_NONE); - return INV_SUCCESS; -} - -/** - * @brief one-time device driver exit function. - * If the driver is built as a kernel module, this function will be - * called when the module is removed from the kernel. - * - * @param mlsl_handle - * the handle to the serial channel the device is connected to. - * @param slave - * a pointer to the slave descriptor data structure. - * @param pdata - * a pointer to the slave platform data. - * - * @return INV_SUCCESS if successful or a non-zero error code. - */ -static int mma8450_exit(void *mlsl_handle, - struct ext_slave_descr *slave, - struct ext_slave_platform_data *pdata) -{ - kfree(pdata->private_data); - return INV_SUCCESS; -} - -/** - * @brief device configuration facility. - * - * @param mlsl_handle - * the handle to the serial channel the device is connected to. - * @param slave - * a pointer to the slave descriptor data structure. - * @param pdata - * a pointer to the slave platform data. - * @param data - * a pointer to the configuration data structure. - * - * @return INV_SUCCESS if successful or a non-zero error code. - */ -static int mma8450_config(void *mlsl_handle, - struct ext_slave_descr *slave, - struct ext_slave_platform_data *pdata, - struct ext_slave_config *data) -{ - struct mma8450_private_data *private_data = pdata->private_data; - if (!data->data) - return INV_ERROR_INVALID_PARAMETER; - - switch (data->key) { - case MPU_SLAVE_CONFIG_ODR_SUSPEND: - return mma8450_set_odr(mlsl_handle, pdata, - &private_data->suspend, - data->apply, - *((long *)data->data)); - case MPU_SLAVE_CONFIG_ODR_RESUME: - return mma8450_set_odr(mlsl_handle, pdata, - &private_data->resume, - data->apply, - *((long *)data->data)); - case MPU_SLAVE_CONFIG_FSR_SUSPEND: - return mma8450_set_fsr(mlsl_handle, pdata, - &private_data->suspend, - data->apply, - *((long *)data->data)); - case MPU_SLAVE_CONFIG_FSR_RESUME: - return mma8450_set_fsr(mlsl_handle, pdata, - &private_data->resume, - data->apply, - *((long *)data->data)); - case MPU_SLAVE_CONFIG_MOT_THS: - return mma8450_set_ths(mlsl_handle, pdata, - &private_data->suspend, - data->apply, - *((long *)data->data)); - case MPU_SLAVE_CONFIG_NMOT_THS: - return mma8450_set_ths(mlsl_handle, pdata, - &private_data->resume, - data->apply, - *((long *)data->data)); - case MPU_SLAVE_CONFIG_MOT_DUR: - return mma8450_set_dur(mlsl_handle, pdata, - &private_data->suspend, - data->apply, - *((long *)data->data)); - case MPU_SLAVE_CONFIG_NMOT_DUR: - return mma8450_set_dur(mlsl_handle, pdata, - &private_data->resume, - data->apply, - *((long *)data->data)); - case MPU_SLAVE_CONFIG_IRQ_SUSPEND: - return mma8450_set_irq(mlsl_handle, pdata, - &private_data->suspend, - data->apply, - *((long *)data->data)); - case MPU_SLAVE_CONFIG_IRQ_RESUME: - return mma8450_set_irq(mlsl_handle, pdata, - &private_data->resume, - data->apply, - *((long *)data->data)); - default: - LOG_RESULT_LOCATION(INV_ERROR_FEATURE_NOT_IMPLEMENTED); - return INV_ERROR_FEATURE_NOT_IMPLEMENTED; - }; - - return INV_SUCCESS; -} - -/** - * @brief facility to retrieve the device configuration. - * - * @param mlsl_handle - * the handle to the serial channel the device is connected to. - * @param slave - * a pointer to the slave descriptor data structure. - * @param pdata - * a pointer to the slave platform data. - * @param data - * a pointer to store the returned configuration data structure. - * - * @return INV_SUCCESS if successful or a non-zero error code. - */ -static int mma8450_get_config(void *mlsl_handle, - struct ext_slave_descr *slave, - struct ext_slave_platform_data *pdata, - struct ext_slave_config *data) -{ - struct mma8450_private_data *private_data = pdata->private_data; - if (!data->data) - return INV_ERROR_INVALID_PARAMETER; - - switch (data->key) { - case MPU_SLAVE_CONFIG_ODR_SUSPEND: - (*(unsigned long *)data->data) = - (unsigned long) private_data->suspend.odr; - break; - case MPU_SLAVE_CONFIG_ODR_RESUME: - (*(unsigned long *)data->data) = - (unsigned long) private_data->resume.odr; - break; - case MPU_SLAVE_CONFIG_FSR_SUSPEND: - (*(unsigned long *)data->data) = - (unsigned long) private_data->suspend.fsr; - break; - case MPU_SLAVE_CONFIG_FSR_RESUME: - (*(unsigned long *)data->data) = - (unsigned long) private_data->resume.fsr; - break; - case MPU_SLAVE_CONFIG_MOT_THS: - (*(unsigned long *)data->data) = - (unsigned long) private_data->suspend.ths; - break; - case MPU_SLAVE_CONFIG_NMOT_THS: - (*(unsigned long *)data->data) = - (unsigned long) private_data->resume.ths; - break; - case MPU_SLAVE_CONFIG_MOT_DUR: - (*(unsigned long *)data->data) = - (unsigned long) private_data->suspend.dur; - break; - case MPU_SLAVE_CONFIG_NMOT_DUR: - (*(unsigned long *)data->data) = - (unsigned long) private_data->resume.dur; - break; - case MPU_SLAVE_CONFIG_IRQ_SUSPEND: - (*(unsigned long *)data->data) = - (unsigned long) private_data->suspend.irq_type; - break; - case MPU_SLAVE_CONFIG_IRQ_RESUME: - (*(unsigned long *)data->data) = - (unsigned long) private_data->resume.irq_type; - break; - default: - LOG_RESULT_LOCATION(INV_ERROR_FEATURE_NOT_IMPLEMENTED); - return INV_ERROR_FEATURE_NOT_IMPLEMENTED; - }; - - return INV_SUCCESS; -} - -static struct ext_slave_descr mma8450_descr = { - .init = mma8450_init, - .exit = mma8450_exit, - .suspend = mma8450_suspend, - .resume = mma8450_resume, - .read = mma8450_read, - .config = mma8450_config, - .get_config = mma8450_get_config, - .name = "mma8450", - .type = EXT_SLAVE_TYPE_ACCEL, - .id = ACCEL_ID_MMA8450, - .read_reg = 0x00, - .read_len = 4, - .endian = EXT_SLAVE_FS8_BIG_ENDIAN, - .range = {2, 0}, - .trigger = NULL, -}; - -static -struct ext_slave_descr *mma8450_get_slave_descr(void) -{ - return &mma8450_descr; -} - -/* -------------------------------------------------------------------------- */ -struct mma8450_mod_private_data { - struct i2c_client *client; - struct ext_slave_platform_data *pdata; -}; - -static unsigned short normal_i2c[] = { I2C_CLIENT_END }; - -static int mma8450_mod_probe(struct i2c_client *client, - const struct i2c_device_id *devid) -{ - struct ext_slave_platform_data *pdata; - struct mma8450_mod_private_data *private_data; - int result = 0; - - dev_info(&client->adapter->dev, "%s: %s\n", __func__, devid->name); - - if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { - result = -ENODEV; - goto out_no_free; - } - - pdata = client->dev.platform_data; - if (!pdata) { - dev_err(&client->adapter->dev, - "Missing platform data for slave %s\n", devid->name); - result = -EFAULT; - goto out_no_free; - } - - private_data = kzalloc(sizeof(*private_data), GFP_KERNEL); - if (!private_data) { - result = -ENOMEM; - goto out_no_free; - } - - i2c_set_clientdata(client, private_data); - private_data->client = client; - private_data->pdata = pdata; - - result = inv_mpu_register_slave(THIS_MODULE, client, pdata, - mma8450_get_slave_descr); - if (result) { - dev_err(&client->adapter->dev, - "Slave registration failed: %s, %d\n", - devid->name, result); - goto out_free_memory; - } - - return result; - -out_free_memory: - kfree(private_data); -out_no_free: - dev_err(&client->adapter->dev, "%s failed %d\n", __func__, result); - return result; - -} - -static int mma8450_mod_remove(struct i2c_client *client) -{ - struct mma8450_mod_private_data *private_data = - i2c_get_clientdata(client); - - dev_dbg(&client->adapter->dev, "%s\n", __func__); - - inv_mpu_unregister_slave(client, private_data->pdata, - mma8450_get_slave_descr); - - kfree(private_data); - return 0; -} - -static const struct i2c_device_id mma8450_mod_id[] = { - { "mma8450", ACCEL_ID_MMA8450 }, - {} -}; - -MODULE_DEVICE_TABLE(i2c, mma8450_mod_id); - -static struct i2c_driver mma8450_mod_driver = { - .class = I2C_CLASS_HWMON, - .probe = mma8450_mod_probe, - .remove = mma8450_mod_remove, - .id_table = mma8450_mod_id, - .driver = { - .owner = THIS_MODULE, - .name = "mma8450_mod", - }, - .address_list = normal_i2c, -}; - -static int __init mma8450_mod_init(void) -{ - int res = i2c_add_driver(&mma8450_mod_driver); - pr_info("%s: Probe name %s\n", __func__, "mma8450_mod"); - if (res) - pr_err("%s failed\n", __func__); - return res; -} - -static void __exit mma8450_mod_exit(void) -{ - pr_info("%s\n", __func__); - i2c_del_driver(&mma8450_mod_driver); -} - -module_init(mma8450_mod_init); -module_exit(mma8450_mod_exit); - -MODULE_AUTHOR("Invensense Corporation"); -MODULE_DESCRIPTION("Driver to integrate MMA8450 sensor with the MPU"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("mma8450_mod"); - -/** - * @} - */ |