Added missing tegra files.HEADmaster

1 files changed, 391 insertions, 0 deletions

diff --git a/drivers/misc/inv_mpu/compass/hmc5883.c b/drivers/misc/inv_mpu/compass/hmc5883.c
new file mode 100644
index 00000000000..fdf2ac00565
--- /dev/null
+++ b/drivers/misc/inv_mpu/compass/hmc5883.c
@@ -0,0 +1,391 @@
+/*
+        $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 COMPASSDL
+ *
+ *  @{
+ *      @file   hmc5883.c
+ *      @brief  Magnetometer setup and handling methods for Honeywell
+ *              HMC5883 compass.
+ */
+
+/* -------------------------------------------------------------------------- */
+
+#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-compass"
+
+/* -------------------------------------------------------------------------- */
+enum HMC_REG {
+        HMC_REG_CONF_A = 0x0,
+        HMC_REG_CONF_B = 0x1,
+        HMC_REG_MODE = 0x2,
+        HMC_REG_X_M = 0x3,
+        HMC_REG_X_L = 0x4,
+        HMC_REG_Z_M = 0x5,
+        HMC_REG_Z_L = 0x6,
+        HMC_REG_Y_M = 0x7,
+        HMC_REG_Y_L = 0x8,
+        HMC_REG_STATUS = 0x9,
+        HMC_REG_ID_A = 0xA,
+        HMC_REG_ID_B = 0xB,
+        HMC_REG_ID_C = 0xC
+};
+
+enum HMC_CONF_A {
+        HMC_CONF_A_DRATE_MASK = 0x1C,
+        HMC_CONF_A_DRATE_0_75 = 0x00,
+        HMC_CONF_A_DRATE_1_5 = 0x04,
+        HMC_CONF_A_DRATE_3 = 0x08,
+        HMC_CONF_A_DRATE_7_5 = 0x0C,
+        HMC_CONF_A_DRATE_15 = 0x10,
+        HMC_CONF_A_DRATE_30 = 0x14,
+        HMC_CONF_A_DRATE_75 = 0x18,
+        HMC_CONF_A_MEAS_MASK = 0x3,
+        HMC_CONF_A_MEAS_NORM = 0x0,
+        HMC_CONF_A_MEAS_POS = 0x1,
+        HMC_CONF_A_MEAS_NEG = 0x2
+};
+
+enum HMC_CONF_B {
+        HMC_CONF_B_GAIN_MASK = 0xE0,
+        HMC_CONF_B_GAIN_0_9 = 0x00,
+        HMC_CONF_B_GAIN_1_2 = 0x20,
+        HMC_CONF_B_GAIN_1_9 = 0x40,
+        HMC_CONF_B_GAIN_2_5 = 0x60,
+        HMC_CONF_B_GAIN_4_0 = 0x80,
+        HMC_CONF_B_GAIN_4_6 = 0xA0,
+        HMC_CONF_B_GAIN_5_5 = 0xC0,
+        HMC_CONF_B_GAIN_7_9 = 0xE0
+};
+
+enum HMC_MODE {
+        HMC_MODE_MASK = 0x3,
+        HMC_MODE_CONT = 0x0,
+        HMC_MODE_SINGLE = 0x1,
+        HMC_MODE_IDLE = 0x2,
+        HMC_MODE_SLEEP = 0x3
+};
+
+/* -------------------------------------------------------------------------- */
+static int hmc5883_suspend(void *mlsl_handle,
+                           struct ext_slave_descr *slave,
+                           struct ext_slave_platform_data *pdata)
+{
+        int result = INV_SUCCESS;
+
+        result =
+            inv_serial_single_write(mlsl_handle, pdata->address,
+                                    HMC_REG_MODE, HMC_MODE_SLEEP);
+        if (result) {
+                LOG_RESULT_LOCATION(result);
+                return result;
+        }
+        msleep(3);
+
+        return result;
+}
+
+static int hmc5883_resume(void *mlsl_handle,
+                          struct ext_slave_descr *slave,
+                          struct ext_slave_platform_data *pdata)
+{
+        int result = INV_SUCCESS;
+
+        /* Use single measurement mode. Start at sleep state. */
+        result =
+            inv_serial_single_write(mlsl_handle, pdata->address,
+                                    HMC_REG_MODE, HMC_MODE_SLEEP);
+        if (result) {
+                LOG_RESULT_LOCATION(result);
+                return result;
+        }
+        /* Config normal measurement */
+        result =
+            inv_serial_single_write(mlsl_handle, pdata->address,
+                                    HMC_REG_CONF_A, 0);
+        if (result) {
+                LOG_RESULT_LOCATION(result);
+                return result;
+        }
+        /* Adjust gain to 307 LSB/Gauss */
+        result =
+            inv_serial_single_write(mlsl_handle, pdata->address,
+                                    HMC_REG_CONF_B, HMC_CONF_B_GAIN_5_5);
+        if (result) {
+                LOG_RESULT_LOCATION(result);
+                return result;
+        }
+
+        return result;
+}
+
+static int hmc5883_read(void *mlsl_handle,
+                        struct ext_slave_descr *slave,
+                        struct ext_slave_platform_data *pdata,
+                        unsigned char *data)
+{
+        unsigned char stat;
+        int result = INV_SUCCESS;
+        unsigned char tmp;
+        short axisFixed;
+
+        /* Read status reg. to check if data is ready */
+        result =
+            inv_serial_read(mlsl_handle, pdata->address, HMC_REG_STATUS, 1,
+                            &stat);
+        if (result) {
+                LOG_RESULT_LOCATION(result);
+                return result;
+        }
+        if (stat & 0x01) {
+                result =
+                    inv_serial_read(mlsl_handle, pdata->address,
+                                    HMC_REG_X_M, 6, (unsigned char *)data);
+                if (result) {
+                        LOG_RESULT_LOCATION(result);
+                        return result;
+                }
+
+                /* switch YZ axis to proper position */
+                tmp = data[2];
+                data[2] = data[4];
+                data[4] = tmp;
+                tmp = data[3];
+                data[3] = data[5];
+                data[5] = tmp;
+
+                /*drop data if overflows */
+                if ((data[0] == 0xf0) || (data[2] == 0xf0)
+                    || (data[4] == 0xf0)) {
+                        /* trigger next measurement read */
+                        result =
+                            inv_serial_single_write(mlsl_handle,
+                                                    pdata->address,
+                                                    HMC_REG_MODE,
+                                                    HMC_MODE_SINGLE);
+                        if (result) {
+                                LOG_RESULT_LOCATION(result);
+                                return result;
+                        }
+                        return INV_ERROR_COMPASS_DATA_OVERFLOW;
+                }
+                /* convert to fixed point and apply sensitivity correction for
+                   Z-axis */
+                axisFixed =
+                    (short)((unsigned short)data[5] +
+                            (unsigned short)data[4] * 256);
+                /* scale up by 1.125 (36/32) */
+                axisFixed = (short)(axisFixed * 36);
+                data[4] = axisFixed >> 8;
+                data[5] = axisFixed & 0xFF;
+
+                axisFixed =
+                    (short)((unsigned short)data[3] +
+                            (unsigned short)data[2] * 256);
+                axisFixed = (short)(axisFixed * 32);
+                data[2] = axisFixed >> 8;
+                data[3] = axisFixed & 0xFF;
+
+                axisFixed =
+                    (short)((unsigned short)data[1] +
+                            (unsigned short)data[0] * 256);
+                axisFixed = (short)(axisFixed * 32);
+                data[0] = axisFixed >> 8;
+                data[1] = axisFixed & 0xFF;
+
+                /* trigger next measurement read */
+                result =
+                    inv_serial_single_write(mlsl_handle, pdata->address,
+                                            HMC_REG_MODE, HMC_MODE_SINGLE);
+                if (result) {
+                        LOG_RESULT_LOCATION(result);
+                        return result;
+                }
+
+                return INV_SUCCESS;
+        } else {
+                /* trigger next measurement read */
+                result =
+                    inv_serial_single_write(mlsl_handle, pdata->address,
+                                            HMC_REG_MODE, HMC_MODE_SINGLE);
+                if (result) {
+                        LOG_RESULT_LOCATION(result);
+                        return result;
+                }
+
+                return INV_ERROR_COMPASS_DATA_NOT_READY;
+        }
+}
+
+static struct ext_slave_descr hmc5883_descr = {
+        .init             = NULL,
+        .exit             = NULL,
+        .suspend          = hmc5883_suspend,
+        .resume           = hmc5883_resume,
+        .read             = hmc5883_read,
+        .config           = NULL,
+        .get_config       = NULL,
+        .name             = "hmc5883",
+        .type             = EXT_SLAVE_TYPE_COMPASS,
+        .id               = COMPASS_ID_HMC5883,
+        .read_reg         = 0x06,
+        .read_len         = 6,
+        .endian           = EXT_SLAVE_BIG_ENDIAN,
+        .range            = {10673, 6156},
+        .trigger          = NULL,
+};
+
+static
+struct ext_slave_descr *hmc5883_get_slave_descr(void)
+{
+        return &hmc5883_descr;
+}
+
+/* -------------------------------------------------------------------------- */
+struct hmc5883_mod_private_data {
+        struct i2c_client *client;
+        struct ext_slave_platform_data *pdata;
+};
+
+static unsigned short normal_i2c[] = { I2C_CLIENT_END };
+
+static int hmc5883_mod_probe(struct i2c_client *client,
+                           const struct i2c_device_id *devid)
+{
+        struct ext_slave_platform_data *pdata;
+        struct hmc5883_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,
+                                        hmc5883_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 hmc5883_mod_remove(struct i2c_client *client)
+{
+        struct hmc5883_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,
+                                hmc5883_get_slave_descr);
+
+        kfree(private_data);
+        return 0;
+}
+
+static const struct i2c_device_id hmc5883_mod_id[] = {
+        { "hmc5883", COMPASS_ID_HMC5883 },
+        {}
+};
+
+MODULE_DEVICE_TABLE(i2c, hmc5883_mod_id);
+
+static struct i2c_driver hmc5883_mod_driver = {
+        .class = I2C_CLASS_HWMON,
+        .probe = hmc5883_mod_probe,
+        .remove = hmc5883_mod_remove,
+        .id_table = hmc5883_mod_id,
+        .driver = {
+                   .owner = THIS_MODULE,
+                   .name = "hmc5883_mod",
+                   },
+        .address_list = normal_i2c,
+};
+
+static int __init hmc5883_mod_init(void)
+{
+        int res = i2c_add_driver(&hmc5883_mod_driver);
+        pr_info("%s: Probe name %s\n", __func__, "hmc5883_mod");
+        if (res)
+                pr_err("%s failed\n", __func__);
+        return res;
+}
+
+static void __exit hmc5883_mod_exit(void)
+{
+        pr_info("%s\n", __func__);
+        i2c_del_driver(&hmc5883_mod_driver);
+}
+
+module_init(hmc5883_mod_init);
+module_exit(hmc5883_mod_exit);
+
+MODULE_AUTHOR("Invensense Corporation");
+MODULE_DESCRIPTION("Driver to integrate HMC5883 sensor with the MPU");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("hmc5883_mod");
+
+/**
+ *  @}
+ */