diff options
Diffstat (limited to 'drivers/misc/inv_mpu/accel/bma150.c')
| -rw-r--r-- | drivers/misc/inv_mpu/accel/bma150.c | 776 |
1 files changed, 0 insertions, 776 deletions
diff --git a/drivers/misc/inv_mpu/accel/bma150.c b/drivers/misc/inv_mpu/accel/bma150.c deleted file mode 100644 index c35f43a..0000000 --- a/drivers/misc/inv_mpu/accel/bma150.c +++ /dev/null @@ -1,776 +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 bma150.c - * @brief Accelerometer setup and handling methods for Bosch BMA150. - */ - -/* -------------------------------------------------------------------------- */ -#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 BMA150_CTRL_REG (0x14) -#define BMA150_INT_REG (0x15) -#define BMA150_PWR_REG (0x0A) - -/* masks */ -#define BMA150_CTRL_MASK (0x18) -#define BMA150_CTRL_MASK_ODR (0xF8) -#define BMA150_CTRL_MASK_FSR (0xE7) -#define BMA150_INT_MASK_WUP (0xF8) -#define BMA150_INT_MASK_IRQ (0xDF) -#define BMA150_PWR_MASK_SLEEP (0x01) -#define BMA150_PWR_MASK_SOFT_RESET (0x02) - -/* -------------------------------------------------------------------------- */ -struct bma150_config { - unsigned int odr; /** < output data rate mHz */ - unsigned int fsr; /** < full scale range mgees */ - unsigned int irq_type; /** < type of IRQ, see bma150_set_irq */ - unsigned char ctrl_reg; /** < control register value */ - unsigned char int_reg; /** < interrupt control register value */ -}; - -struct bma150_private_data { - struct bma150_config suspend; /** < suspend configuration */ - struct bma150_config resume; /** < resume configuration */ -}; - -/** - * @brief Simply disables the IRQ since it is not usable on BMA150 devices. - * - * @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 - * The only supported IRQ type is MPU_SLAVE_IRQ_TYPE_NONE which - * corresponds to disabling the IRQ completely. - * - * @return INV_SUCCESS if successful or a non-zero error code. - */ -static int bma150_set_irq(void *mlsl_handle, - struct ext_slave_platform_data *pdata, - struct bma150_config *config, - int apply, - long irq_type) -{ - int result = INV_SUCCESS; - - if (irq_type != MPU_SLAVE_IRQ_TYPE_NONE) - return INV_ERROR_FEATURE_NOT_IMPLEMENTED; - - config->irq_type = MPU_SLAVE_IRQ_TYPE_NONE; - config->int_reg = 0x00; - - if (apply) { - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA150_CTRL_REG, config->ctrl_reg); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA150_INT_REG, config->int_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 bma150_set_odr(void *mlsl_handle, - struct ext_slave_platform_data *pdata, - struct bma150_config *config, - int apply, - long odr) -{ - unsigned char odr_bits = 0; - unsigned char wup_bits = 0; - int result = INV_SUCCESS; - - if (odr > 100000) { - config->odr = 190000; - odr_bits = 0x03; - } else if (odr > 50000) { - config->odr = 100000; - odr_bits = 0x02; - } else if (odr > 25000) { - config->odr = 50000; - odr_bits = 0x01; - } else if (odr > 0) { - config->odr = 25000; - odr_bits = 0x00; - } else { - config->odr = 0; - wup_bits = 0x00; - } - - config->int_reg &= BMA150_INT_MASK_WUP; - config->ctrl_reg &= BMA150_CTRL_MASK_ODR; - config->ctrl_reg |= odr_bits; - - MPL_LOGV("ODR: %d\n", config->odr); - if (apply) { - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA150_CTRL_REG, config->ctrl_reg); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA150_INT_REG, config->int_reg); - 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 bma150_set_fsr(void *mlsl_handle, - struct ext_slave_platform_data *pdata, - struct bma150_config *config, - int apply, - long fsr) -{ - unsigned char fsr_bits; - int result = INV_SUCCESS; - - if (fsr <= 2048) { - fsr_bits = 0x00; - config->fsr = 2048; - } else if (fsr <= 4096) { - fsr_bits = 0x08; - config->fsr = 4096; - } else { - fsr_bits = 0x10; - config->fsr = 8192; - } - - config->ctrl_reg &= BMA150_CTRL_MASK_FSR; - config->ctrl_reg |= fsr_bits; - - MPL_LOGV("FSR: %d\n", config->fsr); - if (apply) { - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA150_CTRL_REG, config->ctrl_reg); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA150_CTRL_REG, config->ctrl_reg); - 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 bma150_init(void *mlsl_handle, - struct ext_slave_descr *slave, - struct ext_slave_platform_data *pdata) -{ - int result; - unsigned char reg; - long range; - - struct bma150_private_data *private_data; - private_data = (struct bma150_private_data *) - kzalloc(sizeof(struct bma150_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, - BMA150_PWR_REG, BMA150_PWR_MASK_SOFT_RESET); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - msleep(1); - - result = inv_serial_read(mlsl_handle, pdata->address, - BMA150_CTRL_REG, 1, ®); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - private_data->resume.ctrl_reg = reg; - private_data->suspend.ctrl_reg = reg; - - result = inv_serial_read(mlsl_handle, pdata->address, - BMA150_INT_REG, 1, ®); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - private_data->resume.int_reg = reg; - private_data->suspend.int_reg = reg; - - result = bma150_set_odr(mlsl_handle, pdata, &private_data->suspend, - false, 0); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - result = bma150_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 = bma150_set_fsr(mlsl_handle, pdata, &private_data->suspend, - false, range); - result = bma150_set_fsr(mlsl_handle, pdata, &private_data->resume, - false, range); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - - result = bma150_set_irq(mlsl_handle, pdata, &private_data->suspend, - false, MPU_SLAVE_IRQ_TYPE_NONE); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - result = bma150_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, - BMA150_PWR_REG, BMA150_PWR_MASK_SLEEP); - 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 bma150_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 bma150_config(void *mlsl_handle, - struct ext_slave_descr *slave, - struct ext_slave_platform_data *pdata, - struct ext_slave_config *data) -{ - struct bma150_private_data *private_data = - (struct bma150_private_data *)(pdata->private_data); - - if (!data->data) - return INV_ERROR_INVALID_PARAMETER; - - switch (data->key) { - case MPU_SLAVE_CONFIG_ODR_SUSPEND: - return bma150_set_odr(mlsl_handle, pdata, - &private_data->suspend, - data->apply, - *((long *)data->data)); - case MPU_SLAVE_CONFIG_ODR_RESUME: - return bma150_set_odr(mlsl_handle, pdata, - &private_data->resume, - data->apply, - *((long *)data->data)); - case MPU_SLAVE_CONFIG_FSR_SUSPEND: - return bma150_set_fsr(mlsl_handle, pdata, - &private_data->suspend, - data->apply, - *((long *)data->data)); - case MPU_SLAVE_CONFIG_FSR_RESUME: - return bma150_set_fsr(mlsl_handle, pdata, - &private_data->resume, - data->apply, - *((long *)data->data)); - case MPU_SLAVE_CONFIG_IRQ_SUSPEND: - return bma150_set_irq(mlsl_handle, pdata, - &private_data->suspend, - data->apply, - *((long *)data->data)); - case MPU_SLAVE_CONFIG_IRQ_RESUME: - return bma150_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 bma150_get_config(void *mlsl_handle, - struct ext_slave_descr *slave, - struct ext_slave_platform_data *pdata, - struct ext_slave_config *data) -{ - struct bma150_private_data *private_data = - (struct bma150_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 bma150_suspend(void *mlsl_handle, - struct ext_slave_descr *slave, - struct ext_slave_platform_data *pdata) -{ - int result; - unsigned char ctrl_reg; - unsigned char int_reg; - - struct bma150_private_data *private_data = - (struct bma150_private_data *)(pdata->private_data); - - ctrl_reg = private_data->suspend.ctrl_reg; - int_reg = private_data->suspend.int_reg; - - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA150_PWR_REG, BMA150_PWR_MASK_SOFT_RESET); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - msleep(1); - - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA150_CTRL_REG, ctrl_reg); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA150_INT_REG, int_reg); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA150_PWR_REG, BMA150_PWR_MASK_SLEEP); - 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 bma150_resume(void *mlsl_handle, - struct ext_slave_descr *slave, - struct ext_slave_platform_data *pdata) -{ - int result; - unsigned char ctrl_reg; - unsigned char int_reg; - - struct bma150_private_data *private_data = - (struct bma150_private_data *)(pdata->private_data); - - ctrl_reg = private_data->resume.ctrl_reg; - int_reg = private_data->resume.int_reg; - - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA150_PWR_REG, BMA150_PWR_MASK_SOFT_RESET); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - msleep(1); - - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA150_CTRL_REG, ctrl_reg); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA150_INT_REG, int_reg); - if (result) { - LOG_RESULT_LOCATION(result); - return result; - } - - result = inv_serial_single_write(mlsl_handle, pdata->address, - BMA150_PWR_REG, 0x00); - 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 bma150_read(void *mlsl_handle, - struct ext_slave_descr *slave, - struct ext_slave_platform_data *pdata, - unsigned char *data) -{ - return inv_serial_read(mlsl_handle, pdata->address, - slave->read_reg, slave->read_len, data); -} - -static struct ext_slave_descr bma150_descr = { - .init = bma150_init, - .exit = bma150_exit, - .suspend = bma150_suspend, - .resume = bma150_resume, - .read = bma150_read, - .config = bma150_config, - .get_config = bma150_get_config, - .name = "bma150", - .type = EXT_SLAVE_TYPE_ACCEL, - .id = ACCEL_ID_BMA150, - .read_reg = 0x02, - .read_len = 6, - .endian = EXT_SLAVE_LITTLE_ENDIAN, - .range = {2, 0}, - .trigger = NULL, -}; - -static -struct ext_slave_descr *bma150_get_slave_descr(void) -{ - return &bma150_descr; -} - -/* -------------------------------------------------------------------------- */ - -/* Platform data for the MPU */ -struct bma150_mod_private_data { - struct i2c_client *client; - struct ext_slave_platform_data *pdata; -}; - -static unsigned short normal_i2c[] = { I2C_CLIENT_END }; - -static int bma150_mod_probe(struct i2c_client *client, - const struct i2c_device_id *devid) -{ - struct ext_slave_platform_data *pdata; - struct bma150_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, - bma150_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 bma150_mod_remove(struct i2c_client *client) -{ - struct bma150_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, - bma150_get_slave_descr); - - kfree(private_data); - return 0; -} - -static const struct i2c_device_id bma150_mod_id[] = { - { "bma150", ACCEL_ID_BMA150 }, - {} -}; - -MODULE_DEVICE_TABLE(i2c, bma150_mod_id); - -static struct i2c_driver bma150_mod_driver = { - .class = I2C_CLASS_HWMON, - .probe = bma150_mod_probe, - .remove = bma150_mod_remove, - .id_table = bma150_mod_id, - .driver = { - .owner = THIS_MODULE, - .name = "bma150_mod", - }, - .address_list = normal_i2c, -}; - -static int __init bma150_mod_init(void) -{ - int res = i2c_add_driver(&bma150_mod_driver); - pr_info("%s: Probe name %s\n", __func__, "bma150_mod"); - if (res) - pr_err("%s failed\n", __func__); - return res; -} - -static void __exit bma150_mod_exit(void) -{ - pr_info("%s\n", __func__); - i2c_del_driver(&bma150_mod_driver); -} - -module_init(bma150_mod_init); -module_exit(bma150_mod_exit); - -MODULE_AUTHOR("Invensense Corporation"); -MODULE_DESCRIPTION("Driver to integrate BMA150 sensor with the MPU"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("bma150_mod"); - -/** - * @} - */ |