diff options
Diffstat (limited to 'drivers/misc/inv_mpu/accel/bma250.c')
| -rw-r--r-- | drivers/misc/inv_mpu/accel/bma250.c | 787 |
1 files changed, 0 insertions, 787 deletions
diff --git a/drivers/misc/inv_mpu/accel/bma250.c b/drivers/misc/inv_mpu/accel/bma250.c deleted file mode 100644 index 6a245f4..0000000 --- a/drivers/misc/inv_mpu/accel/bma250.c +++ /dev/null @@ -1,787 +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 bma250.c - * @brief Accelerometer setup and handling methods for Bosch BMA250. - */ - -/* -------------------------------------------------------------------------- */ - -#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 <linux/mpu.h> -#include "mlsl.h" -#include "mldl_cfg.h" - -/* -------------------------------------------------------------------------- */ - -/* registers */ -#define BMA250_STATUS_REG (0x0A) -#define BMA250_FSR_REG (0x0F) -#define BMA250_ODR_REG (0x10) -#define BMA250_PWR_REG (0x11) -#define BMA250_SOFTRESET_REG (0x14) -#define BMA250_INT_TYPE_REG (0x17) -#define BMA250_INT_DST_REG (0x1A) -#define BMA250_INT_SRC_REG (0x1E) - -/* masks */ -#define BMA250_STATUS_RDY_MASK (0x80) -#define BMA250_FSR_MASK (0x0F) -#define BMA250_ODR_MASK (0x1F) -#define BMA250_PWR_SLEEP_MASK (0x80) -#define BMA250_PWR_AWAKE_MASK (0x00) -#define BMA250_SOFTRESET_MASK (0xB6) -#define BMA250_INT_TYPE_MASK (0x10) -#define BMA250_INT_DST_1_MASK (0x01) -#define BMA250_INT_DST_2_MASK (0x80) -#define BMA250_INT_SRC_MASK (0x00) - -/* -------------------------------------------------------------------------- */ - -struct bma250_config { - unsigned int odr; /** < output data rate in mHz */ - unsigned int fsr; /** < full scale range mg */ - unsigned char irq_type; -}; - -struct bma250_private_data { - struct bma250_config suspend; /** < suspend configuration */ - struct bma250_config resume; /** < resume configuration */ -}; - -/* -------------------------------------------------------------------------- */ -/** - * @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 bma250_set_irq(void *mlsl_handle, - struct ext_slave_platform_data *pdata, - struct bma250_config *config, - int apply, long irq_type) -{ - int result = INV_SUCCESS; - unsigned char irqtype_reg; - unsigned char irqdst_reg; - unsigned char irqsrc_reg; - - switch (irq_type) { - case MPU_SLAVE_IRQ_TYPE_DATA_READY: - /* data ready int. */ - irqtype_reg = BMA250_INT_TYPE_MASK; - /* routed to interrupt pin 1 */ - irqdst_reg = BMA250_INT_DST_1_MASK; - /* from filtered data */ - irqsrc_reg = BMA250_INT_SRC_MASK; - break; - /* unfinished - case MPU_SLAVE_IRQ_TYPE_MOTION: - reg1 = 0x00; - reg2 = config->mot_int1_cfg; - reg3 = ; - break; - */ - case MPU_SLAVE_IRQ_TYPE_NONE: - irqtype_reg = 0x00; - irqdst_reg = 0x00; - irqsrc_reg = 0x00; - break; - default: - return INV_ERROR_INVALID_PARAMETER; - break; - } - - config->irq_type = (unsigned char)irq_type; - - if (apply) { - /* select the type of interrupt to use */ - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA250_INT_TYPE_REG, irqtype_reg); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - /* select to which interrupt pin to route it to */ - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA250_INT_DST_REG, irqdst_reg); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - /* select whether the interrupt works off filtered or - unfiltered data */ - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA250_INT_SRC_REG, irqsrc_reg); - 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 bma250_set_odr(void *mlsl_handle, - struct ext_slave_platform_data *pdata, - struct bma250_config *config, - int apply, - long odr) -{ - int result = INV_SUCCESS; - unsigned char reg_odr; - - /* Table uses bandwidth which is half the sample rate */ - odr = odr >> 1; - if (odr >= 1000000) { - reg_odr = 0x0F; - config->odr = 2000000; - } else if (odr >= 500000) { - reg_odr = 0x0E; - config->odr = 1000000; - } else if (odr >= 250000) { - reg_odr = 0x0D; - config->odr = 500000; - } else if (odr >= 125000) { - reg_odr = 0x0C; - config->odr = 250000; - } else if (odr >= 62500) { - reg_odr = 0x0B; - config->odr = 125000; - } else if (odr >= 31250) { - reg_odr = 0x0A; - config->odr = 62500; - } else if (odr >= 15630) { - reg_odr = 0x09; - config->odr = 31250; - } else { - reg_odr = 0x08; - config->odr = 15630; - } - - if (apply) { - MPL_LOGV("ODR: %d\n", config->odr); - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA250_ODR_REG, reg_odr); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - } - - 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 bma250_set_fsr(void *mlsl_handle, - struct ext_slave_platform_data *pdata, - struct bma250_config *config, - int apply, - long fsr) -{ - int result = INV_SUCCESS; - unsigned char reg_fsr_mask; - - if (fsr <= 2000) { - reg_fsr_mask = 0x03; - config->fsr = 2000; - } else if (fsr <= 4000) { - reg_fsr_mask = 0x05; - config->fsr = 4000; - } else if (fsr <= 8000) { - reg_fsr_mask = 0x08; - config->fsr = 8000; - } else { /* 8001 -> oo */ - reg_fsr_mask = 0x0C; - config->fsr = 16000; - } - - if (apply) { - MPL_LOGV("FSR: %d\n", config->fsr); - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA250_FSR_REG, reg_fsr_mask); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - } - 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 bma250_init(void *mlsl_handle, - struct ext_slave_descr *slave, - struct ext_slave_platform_data *pdata) -{ - int result; - long range; - - struct bma250_private_data *private_data; - private_data = kzalloc(sizeof(struct bma250_private_data), GFP_KERNEL); - - if (!private_data) - return INV_ERROR_MEMORY_EXAUSTED; - - pdata->private_data = private_data; - - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA250_SOFTRESET_REG, BMA250_SOFTRESET_MASK); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - msleep(1); - - result = bma250_set_odr(mlsl_handle, pdata, &private_data->suspend, - false, 0); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - result = bma250_set_odr(mlsl_handle, pdata, &private_data->resume, - false, 200000); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - - range = range_fixedpoint_to_long_mg(slave->range); - result = bma250_set_fsr(mlsl_handle, pdata, &private_data->suspend, - false, range); - result = bma250_set_fsr(mlsl_handle, pdata, &private_data->resume, - false, range); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - - result = bma250_set_irq(mlsl_handle, pdata, &private_data->suspend, - false, MPU_SLAVE_IRQ_TYPE_NONE); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - result = bma250_set_irq(mlsl_handle, pdata, &private_data->resume, - false, MPU_SLAVE_IRQ_TYPE_NONE); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA250_PWR_REG, BMA250_PWR_SLEEP_MASK); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - - return result; -} - -/** - * @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 bma250_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 bma250_config(void *mlsl_handle, - struct ext_slave_descr *slave, - struct ext_slave_platform_data *pdata, - struct ext_slave_config *data) -{ - struct bma250_private_data *private_data = - (struct bma250_private_data *)(pdata->private_data); - - if (!data->data) - return INV_ERROR_INVALID_PARAMETER; - - switch (data->key) { - case MPU_SLAVE_CONFIG_ODR_SUSPEND: - return bma250_set_odr(mlsl_handle, pdata, - &private_data->suspend, - data->apply, - *((long *)data->data)); - case MPU_SLAVE_CONFIG_ODR_RESUME: - return bma250_set_odr(mlsl_handle, pdata, - &private_data->resume, - data->apply, - *((long *)data->data)); - case MPU_SLAVE_CONFIG_FSR_SUSPEND: - return bma250_set_fsr(mlsl_handle, pdata, - &private_data->suspend, - data->apply, - *((long *)data->data)); - case MPU_SLAVE_CONFIG_FSR_RESUME: - return bma250_set_fsr(mlsl_handle, pdata, - &private_data->resume, - data->apply, - *((long *)data->data)); - case MPU_SLAVE_CONFIG_IRQ_SUSPEND: - return bma250_set_irq(mlsl_handle, pdata, - &private_data->suspend, - data->apply, - *((long *)data->data)); - case MPU_SLAVE_CONFIG_IRQ_RESUME: - return bma250_set_irq(mlsl_handle, pdata, - &private_data->resume, - data->apply, - *((long *)data->data)); - default: - 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 bma250_get_config(void *mlsl_handle, - struct ext_slave_descr *slave, - struct ext_slave_platform_data *pdata, - struct ext_slave_config *data) -{ - struct bma250_private_data *private_data = - (struct bma250_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_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: - return INV_ERROR_FEATURE_NOT_IMPLEMENTED; - }; - - return INV_SUCCESS; -} - -/** - * @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 bma250_suspend(void *mlsl_handle, - struct ext_slave_descr *slave, - struct ext_slave_platform_data *pdata) -{ - int result; - struct bma250_config *suspend_config = - &((struct bma250_private_data *)pdata->private_data)->suspend; - - result = bma250_set_odr(mlsl_handle, pdata, suspend_config, - true, suspend_config->odr); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - result = bma250_set_fsr(mlsl_handle, pdata, suspend_config, - true, suspend_config->fsr); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - result = bma250_set_irq(mlsl_handle, pdata, suspend_config, - true, suspend_config->irq_type); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA250_PWR_REG, BMA250_PWR_SLEEP_MASK); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - - msleep(3); /* 3 ms powerup time maximum */ - 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 bma250_resume(void *mlsl_handle, - struct ext_slave_descr *slave, - struct ext_slave_platform_data *pdata) -{ - int result; - struct bma250_config *resume_config = - &((struct bma250_private_data *)pdata->private_data)->resume; - - result = bma250_set_odr(mlsl_handle, pdata, resume_config, - true, resume_config->odr); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - result = bma250_set_fsr(mlsl_handle, pdata, resume_config, - true, resume_config->fsr); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - result = bma250_set_irq(mlsl_handle, pdata, resume_config, - true, resume_config->irq_type); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA250_PWR_REG, BMA250_PWR_AWAKE_MASK); - 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 bma250_read(void *mlsl_handle, - struct ext_slave_descr *slave, - struct ext_slave_platform_data *pdata, - unsigned char *data) -{ - int result = INV_SUCCESS; - result = inv_serial_read(mlsl_handle, pdata->address, - BMA250_STATUS_REG, 1, data); - if (1) { /* KLP - workaroud for small data ready window */ - result = inv_serial_read(mlsl_handle, pdata->address, - slave->read_reg, slave->read_len, data); - return result; - } else - return INV_ERROR_ACCEL_DATA_NOT_READY; -} - -static struct ext_slave_descr bma250_descr = { - .init = bma250_init, - .exit = bma250_exit, - .suspend = bma250_suspend, - .resume = bma250_resume, - .read = bma250_read, - .config = bma250_config, - .get_config = bma250_get_config, - .name = "bma250", - .type = EXT_SLAVE_TYPE_ACCEL, - .id = ACCEL_ID_BMA250, - .read_reg = 0x02, - .read_len = 6, - .endian = EXT_SLAVE_LITTLE_ENDIAN, - .range = {2, 0}, - .trigger = NULL, -}; - -static -struct ext_slave_descr *bma250_get_slave_descr(void) -{ - return &bma250_descr; -} - -/* -------------------------------------------------------------------------- */ - -/* Platform data for the MPU */ -struct bma250_mod_private_data { - struct i2c_client *client; - struct ext_slave_platform_data *pdata; -}; - -static unsigned short normal_i2c[] = { I2C_CLIENT_END }; - -static int bma250_mod_probe(struct i2c_client *client, - const struct i2c_device_id *devid) -{ - struct ext_slave_platform_data *pdata; - struct bma250_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, - bma250_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 bma250_mod_remove(struct i2c_client *client) -{ - struct bma250_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, - bma250_get_slave_descr); - - kfree(private_data); - return 0; -} - -static const struct i2c_device_id bma250_mod_id[] = { - { "bma250", ACCEL_ID_BMA250 }, - {} -}; - -MODULE_DEVICE_TABLE(i2c, bma250_mod_id); - -static struct i2c_driver bma250_mod_driver = { - .class = I2C_CLASS_HWMON, - .probe = bma250_mod_probe, - .remove = bma250_mod_remove, - .id_table = bma250_mod_id, - .driver = { - .owner = THIS_MODULE, - .name = "bma250_mod", - }, - .address_list = normal_i2c, -}; - -static int __init bma250_mod_init(void) -{ - int res = i2c_add_driver(&bma250_mod_driver); - pr_info("%s: Probe name %s\n", __func__, "bma250_mod"); - if (res) - pr_err("%s failed\n", __func__); - return res; -} - -static void __exit bma250_mod_exit(void) -{ - pr_info("%s\n", __func__); - i2c_del_driver(&bma250_mod_driver); -} - -module_init(bma250_mod_init); -module_exit(bma250_mod_exit); - -MODULE_AUTHOR("Invensense Corporation"); -MODULE_DESCRIPTION("Driver to integrate BMA250 sensor with the MPU"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("bma250_mod"); - -/** - * @} - */ |