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-rw-r--r--drivers/misc/inv_mpu/accel/kxsd9.c264
1 files changed, 264 insertions, 0 deletions
diff --git a/drivers/misc/inv_mpu/accel/kxsd9.c b/drivers/misc/inv_mpu/accel/kxsd9.c
new file mode 100644
index 0000000..5cb4eaf
--- /dev/null
+++ b/drivers/misc/inv_mpu/accel/kxsd9.c
@@ -0,0 +1,264 @@
+/*
+ $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 Accelerometer setup and handling methods for Kionix KXSD9.
+ *
+ * @{
+ * @file kxsd9.c
+ * @brief Accelerometer setup and handling methods for Kionix KXSD9.
+ */
+
+/* -------------------------------------------------------------------------- */
+
+#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"
+
+/* -------------------------------------------------------------------------- */
+
+static int kxsd9_suspend(void *mlsl_handle,
+ struct ext_slave_descr *slave,
+ struct ext_slave_platform_data *pdata)
+{
+ int result;
+ /* CTRL_REGB: low-power standby mode */
+ result =
+ inv_serial_single_write(mlsl_handle, pdata->address, 0x0d, 0x0);
+ if (result) {
+ LOG_RESULT_LOCATION(result);
+ return result;
+ }
+ return result;
+}
+
+/* full scale setting - register and mask */
+#define ACCEL_KIONIX_CTRL_REG (0x0C)
+#define ACCEL_KIONIX_CTRL_MASK (0x3)
+
+static int kxsd9_resume(void *mlsl_handle,
+ struct ext_slave_descr *slave,
+ struct ext_slave_platform_data *pdata)
+{
+ int result = INV_SUCCESS;
+ unsigned char reg;
+
+ /* Full Scale */
+ reg = 0x0;
+ reg &= ~ACCEL_KIONIX_CTRL_MASK;
+ reg |= 0x00;
+ if (slave->range.mantissa == 4) { /* 4g scale = 4.9951 */
+ reg |= 0x2;
+ slave->range.fraction = 9951;
+ } else if (slave->range.mantissa == 7) { /* 6g scale = 7.5018 */
+ reg |= 0x1;
+ slave->range.fraction = 5018;
+ } else if (slave->range.mantissa == 9) { /* 8g scale = 9.9902 */
+ reg |= 0x0;
+ slave->range.fraction = 9902;
+ } else {
+ slave->range.mantissa = 2; /* 2g scale = 2.5006 */
+ slave->range.fraction = 5006;
+ reg |= 0x3;
+ }
+ reg |= 0xC0; /* 100Hz LPF */
+ result =
+ inv_serial_single_write(mlsl_handle, pdata->address,
+ ACCEL_KIONIX_CTRL_REG, reg);
+ if (result) {
+ LOG_RESULT_LOCATION(result);
+ return result;
+ }
+ /* normal operation */
+ result =
+ inv_serial_single_write(mlsl_handle, pdata->address, 0x0d, 0x40);
+ if (result) {
+ LOG_RESULT_LOCATION(result);
+ return result;
+ }
+
+ return INV_SUCCESS;
+}
+
+static int kxsd9_read(void *mlsl_handle,
+ struct ext_slave_descr *slave,
+ struct ext_slave_platform_data *pdata,
+ unsigned char *data)
+{
+ int result;
+ result = inv_serial_read(mlsl_handle, pdata->address,
+ slave->read_reg, slave->read_len, data);
+ return result;
+}
+
+static struct ext_slave_descr kxsd9_descr = {
+ .init = NULL,
+ .exit = NULL,
+ .suspend = kxsd9_suspend,
+ .resume = kxsd9_resume,
+ .read = kxsd9_read,
+ .config = NULL,
+ .get_config = NULL,
+ .name = "kxsd9",
+ .type = EXT_SLAVE_TYPE_ACCEL,
+ .id = ACCEL_ID_KXSD9,
+ .read_reg = 0x00,
+ .read_len = 6,
+ .endian = EXT_SLAVE_BIG_ENDIAN,
+ .range = {2, 5006},
+ .trigger = NULL,
+};
+
+static
+struct ext_slave_descr *kxsd9_get_slave_descr(void)
+{
+ return &kxsd9_descr;
+}
+
+/* -------------------------------------------------------------------------- */
+struct kxsd9_mod_private_data {
+ struct i2c_client *client;
+ struct ext_slave_platform_data *pdata;
+};
+
+static unsigned short normal_i2c[] = { I2C_CLIENT_END };
+
+static int kxsd9_mod_probe(struct i2c_client *client,
+ const struct i2c_device_id *devid)
+{
+ struct ext_slave_platform_data *pdata;
+ struct kxsd9_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,
+ kxsd9_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 kxsd9_mod_remove(struct i2c_client *client)
+{
+ struct kxsd9_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,
+ kxsd9_get_slave_descr);
+
+ kfree(private_data);
+ return 0;
+}
+
+static const struct i2c_device_id kxsd9_mod_id[] = {
+ { "kxsd9", ACCEL_ID_KXSD9 },
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, kxsd9_mod_id);
+
+static struct i2c_driver kxsd9_mod_driver = {
+ .class = I2C_CLASS_HWMON,
+ .probe = kxsd9_mod_probe,
+ .remove = kxsd9_mod_remove,
+ .id_table = kxsd9_mod_id,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "kxsd9_mod",
+ },
+ .address_list = normal_i2c,
+};
+
+static int __init kxsd9_mod_init(void)
+{
+ int res = i2c_add_driver(&kxsd9_mod_driver);
+ pr_info("%s: Probe name %s\n", __func__, "kxsd9_mod");
+ if (res)
+ pr_err("%s failed\n", __func__);
+ return res;
+}
+
+static void __exit kxsd9_mod_exit(void)
+{
+ pr_info("%s\n", __func__);
+ i2c_del_driver(&kxsd9_mod_driver);
+}
+
+module_init(kxsd9_mod_init);
+module_exit(kxsd9_mod_exit);
+
+MODULE_AUTHOR("Invensense Corporation");
+MODULE_DESCRIPTION("Driver to integrate KXSD9 sensor with the MPU");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("kxsd9_mod");
+
+/**
+ * @}
+ */
generated by cgit v1.1 at 2024-05-17 05:50:08 +0000