1 /* drivers/input/sensors/gyro/Ewtsa.c
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3 * Copyright (C) 2012-2015 ROCKCHIP.
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4 * Author: zhangaihui <zah@rock-chips.com>
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6 * This software is licensed under the terms of the GNU General Public
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7 * License version 2, as published by the Free Software Foundation, and
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8 * may be copied, distributed, and modified under those terms.
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10 * This program is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 * GNU General Public License for more details.
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16 #include <linux/interrupt.h>
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17 #include <linux/i2c.h>
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18 #include <linux/slab.h>
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19 #include <linux/irq.h>
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20 #include <linux/miscdevice.h>
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21 #include <linux/gpio.h>
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22 #include <asm/uaccess.h>
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23 #include <asm/atomic.h>
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24 #include <linux/delay.h>
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25 #include <linux/input.h>
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26 #include <linux/workqueue.h>
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27 #include <linux/freezer.h>
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28 #include <linux/of_gpio.h>
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29 #ifdef CONFIG_HAS_EARLYSUSPEND
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30 #include <linux/earlysuspend.h>
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32 #include <linux/sensor-dev.h>
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34 /** This define controls compilation of the master device interface */
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35 /*#define EWTSA_MASTER_DEVICE*/
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37 #define GYRO_MOUNT_SWAP_XY 0 /* swap X, Y */
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38 #define GYRO_MOUNT_REVERSE_X 0 /* reverse X */
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39 #define GYRO_MOUNT_REVERSE_Y 0 /* reverse Y */
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40 #define GYRO_MOUNT_REVERSE_Z 0 /* reverse Z */
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43 /*#define CHIP_ID 0x68*/
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44 #define DEVICE_NAME "ewtsa"
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47 #define SLEEP_PIN 14
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50 #define MAX_VALUE 32768
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52 /* ewtsa_delay parameter */
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53 #define DELAY_THRES_MIN 1
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54 #define DELAY_THRES_1 4
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55 #define DELAY_THRES_2 9 /* msec x 90% */
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56 #define DELAY_THRES_3 18
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57 #define DELAY_THRES_4 45
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58 #define DELAY_THRES_5 90
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59 #define DELAY_THRES_6 128
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60 #define DELAY_THRES_MAX 255
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61 #define DELAY_DLPF_2 2
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62 #define DELAY_DLPF_3 3
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63 #define DELAY_DLPF_4 4
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64 #define DELAY_DLPF_5 5
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65 #define DELAY_DLPF_6 6
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66 #define DELAY_INTMIN_THRES 9
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68 #define DATA_RATE_1 0x01
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70 /* ewtsa_sleep parameter */
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75 #define EWTSA_POLLING_MODE 0
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76 #define EWTSA_INTERUPT_MODE 1
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78 /* ewtsa register address */
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79 #define REG_SMPL 0x15
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80 #define REG_FS_DLPF 0x16
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81 #define REG_INT_CFG 0x17
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82 #define REG_INT_STATUS 0x1A
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83 #define REG_SELF_O_C 0x29
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84 #define REG_PWR_MGM 0x3E
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85 #define REG_MBURST_ALL 0xFF
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86 #define GYRO_DATA_REG 0x1D
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88 /* ewtsa register param */
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89 #define SELF_O_C_ENABLE 0x00
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90 #define SELF_O_C_DISABLE 0x01
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91 #define SLEEP_CTRL_ACTIVATE 0x40
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92 #define SLEEP_CTRL_SLEEP 0x00
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93 #define INT_CFG_INT_ENABLE 0x01
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94 #define INT_CFG_INT_DISABLE 0x00
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96 /* ewtsa interrupt control */
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97 #define EWSTA_INT_CLEAR 0x00
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98 #define EWSTA_INT_SKIP 0x01
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101 #define EWTSA_BOOST_TIME_0 500
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103 /* sleep setting range */
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104 #define EWTSA_SLP_MIN 0
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105 #define EWTSA_SLP_MAX 1
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107 /* delay setting range */
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108 #define EWTSA_DLY_MIN 1
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109 #define EWTSA_DLY_MAX 255
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111 /* range setting range */
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112 #define EWTSA_RNG_MIN 0
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113 #define EWTSA_RNG_MAX 3
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115 /* soc setting range */
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116 #define EWTSA_SOC_MIN 0
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117 #define EWTSA_SOC_MAX 1
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119 /* event setting range */
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120 #define EWTSA_EVE_MIN 0
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121 #define EWTSA_EVE_MAX 1
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124 #define SLEEP_INIT_VAL (SLEEP_ON)
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125 #define DELAY_INIT_VAL 10
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126 #define RANGE_INIT_VAL 2 /*range 1000*/
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127 #define DLPF_INIT_VAL (DELAY_DLPF_2)
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128 #define CALIB_FUNC_INIT_VAL (EWTSA_ON)
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130 /*config store counter num*/
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131 #define CONFIG_COUNTER_MIN (6+9)
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132 #define CONFIG_COUNTER_MAX (32+9)
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135 #define COMMAND_NAME_SOC 0
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136 #define COMMAND_NAME_DLY 1
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137 #define COMMAND_NAME_RNG 2
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138 #define COMMAND_NAME_EVE 3
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139 #define COMMAND_NAME_SLP 4
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140 #define COMMAND_NAME_NUM 5
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142 #define EWTSA_delay DELAY_INIT_VAL
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143 #define EWTSA_range RANGE_INIT_VAL
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144 #define EWTSA_calib EWTSA_ON
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146 /****************operate according to sensor chip:start************/
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147 static int i2c_read_byte(struct i2c_client *thisClient, unsigned char regAddr, char *pReadData)
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151 ret = i2c_master_send( thisClient, (char*)®Addr, 1);
154 printk("EWTSA send cAddress=0x%x error!\n", regAddr);
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157 ret = i2c_master_recv( thisClient, (char*)pReadData, 1);
160 printk("EWTSAread *pReadData=0x%x error!\n", *pReadData);
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166 static int i2c_write_byte(struct i2c_client *thisClient, unsigned char regAddr, unsigned char writeData)
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168 char write_data[2] = {0};
171 write_data[0] = regAddr;
172 write_data[1] = writeData;
174 ret = i2c_master_send(thisClient, write_data, 2);
177 ret = i2c_master_send(thisClient, write_data, 2);
180 printk("EWTSA send regAddr=0x%x error!\n", regAddr);
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189 static int ewtsa_system_restart(struct i2c_client *client)
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195 err = i2c_write_byte(client, ( unsigned char)REG_SELF_O_C, ( unsigned char)SELF_O_C_DISABLE);
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201 if (EWTSA_delay <= ( unsigned char)DELAY_THRES_2) {
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202 smpl = ( unsigned char)DELAY_INTMIN_THRES;
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204 smpl = ( unsigned char)(EWTSA_delay - ( unsigned char)1);
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206 err = i2c_write_byte(client, ( unsigned char)REG_SMPL, ( unsigned char)smpl);
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212 if (EWTSA_delay >= ( unsigned char)DELAY_THRES_6){
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213 dlpf = ( unsigned char)DELAY_DLPF_6;
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214 }else if (EWTSA_delay >= ( unsigned char)DELAY_THRES_5) {
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215 dlpf = ( unsigned char)DELAY_DLPF_5;
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216 }else if (EWTSA_delay >= ( unsigned char)DELAY_THRES_4){
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217 dlpf = ( unsigned char)DELAY_DLPF_4;
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218 }else if (EWTSA_delay >= ( unsigned char)DELAY_THRES_3) {
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219 dlpf = ( unsigned char)DELAY_DLPF_3;
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221 dlpf = ( unsigned char)DELAY_DLPF_2;
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224 reg = ( unsigned char)(( unsigned char)(EWTSA_range << 3) | dlpf | ( unsigned char)0x80 ) ;
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226 err = i2c_write_byte(client, REG_FS_DLPF, reg);
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231 if (EWTSA_calib== EWTSA_ON) {
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232 printk("EWTSA_set_calibration() start \n");
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233 err = i2c_write_byte(client,( unsigned char)REG_SELF_O_C, ( unsigned char)SELF_O_C_ENABLE);
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238 printk("EWTSA_set_calibration() end \n");
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245 static int ewtsa_disable(struct i2c_client *client)
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247 struct sensor_private_data *sensor =
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248 (struct sensor_private_data *) i2c_get_clientdata(client);
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250 gpio_direction_output(sensor->pdata->standby_pin, GPIO_HIGH);
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252 DBG("%s: end \n",__func__);
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257 static int ewtsa_enable(struct i2c_client *client)
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260 struct sensor_private_data *sensor =
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261 (struct sensor_private_data *) i2c_get_clientdata(client);
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263 gpio_direction_output(sensor->pdata->standby_pin, GPIO_LOW);
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264 err = i2c_write_byte(client, ( unsigned char)REG_PWR_MGM, ( unsigned char)SLEEP_CTRL_ACTIVATE);////0x44
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267 err = ewtsa_system_restart(client);///restart; only when i2c error
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273 err = i2c_write_byte(client, ( unsigned char) REG_INT_CFG, ( unsigned char)INT_CFG_INT_ENABLE);
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277 DBG("%s: end \n",__func__);
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281 void gyro_dev_reset(struct i2c_client *client)
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283 struct sensor_private_data *sensor =
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284 (struct sensor_private_data *) i2c_get_clientdata(client);
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287 DBG("%s\n",__func__);
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288 gpio_direction_output(sensor->pdata->standby_pin, GPIO_HIGH);
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290 gpio_direction_output(sensor->pdata->standby_pin, GPIO_LOW);
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294 static int sensor_active(struct i2c_client *client, int enable, int rate)
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296 struct sensor_private_data *sensor =
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297 (struct sensor_private_data *) i2c_get_clientdata(client);
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300 //register setting according to chip datasheet
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303 result=ewtsa_enable(client);
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307 result=ewtsa_disable(client);
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311 printk("%s:fail to active sensor\n",__func__);
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317 static int sensor_init(struct i2c_client *client)
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319 struct sensor_private_data *sensor =
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320 (struct sensor_private_data *) i2c_get_clientdata(client);
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322 unsigned char buf[5];
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323 unsigned char data = 0;
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327 sensor->status_cur = SENSOR_OFF;
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328 gyro_dev_reset(client);
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329 ewtsa_system_restart(client);
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334 static int gyro_report_value(struct i2c_client *client, struct sensor_axis *axis)
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336 struct sensor_private_data *sensor =
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337 (struct sensor_private_data *) i2c_get_clientdata(client);
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339 /* Report GYRO information */
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340 input_report_rel(sensor->input_dev, ABS_RX, axis->x);
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341 input_report_rel(sensor->input_dev, ABS_RY, axis->y);
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342 input_report_rel(sensor->input_dev, ABS_RZ, axis->z);
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343 input_sync(sensor->input_dev);
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344 DBG("gyro x==%d y==%d z==%d\n",axis->x,axis->y,axis->z);
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349 static int sensor_report_value(struct i2c_client *client)
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351 struct sensor_private_data *sensor =
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352 (struct sensor_private_data *) i2c_get_clientdata(client);
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353 struct sensor_platform_data *pdata = sensor->pdata;
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355 int x = 0, y = 0, z = 0;
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356 struct sensor_axis axis;
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357 char buffer[6] = {0};
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361 memset(buffer, 0, 6);
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363 /* Data bytes from hardware xL, xH, yL, yH, zL, zH */
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365 buffer[0] = sensor->ops->read_reg;
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366 ret = sensor_rx_data(client, buffer, sensor->ops->read_len);
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374 i2c_read_byte(client, sensor->ops->read_reg + i,&buffer[i]);
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378 x = (short) (((buffer[0]) << 8) | buffer[1]);
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379 y = (short) (((buffer[2]) << 8) | buffer[3]);
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380 z = (short) (((buffer[4]) << 8) | buffer[5]);
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382 //printk("%s: x=%d y=%d z=%d \n",__func__, x,y,z);
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383 if(pdata && pdata->orientation)
385 axis.x = (pdata->orientation[0])*x + (pdata->orientation[1])*y + (pdata->orientation[2])*z;
386 axis.y = (pdata->orientation[3])*x + (pdata->orientation[4])*y + (pdata->orientation[5])*z;
387 axis.z = (pdata->orientation[6])*x + (pdata->orientation[7])*y + (pdata->orientation[8])*z;
397 if((abs(axis.x) > pdata->x_min)||(abs(axis.y) > pdata->y_min)||(abs(axis.z) > pdata->z_min))
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399 gyro_report_value(client, &axis);
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401 /* »¥³âµØ»º´æÊý¾Ý. */
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402 mutex_lock(&(sensor->data_mutex) );
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403 sensor->axis = axis;
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404 mutex_unlock(&(sensor->data_mutex) );
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411 struct sensor_operate gyro_ewtsa_ops = {
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413 .type = SENSOR_TYPE_GYROSCOPE,//sensor type and it should be correct
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414 .id_i2c = GYRO_ID_EWTSA, //i2c id number
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415 .read_reg = GYRO_DATA_REG, //read data
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416 .read_len = 6, //data length
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417 .id_reg = -1, //read device id from this register
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418 .id_data = -1, //device id
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419 .precision = 8, //8 bits
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420 .ctrl_reg = REG_PWR_MGM, //enable or disable
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421 .int_status_reg = REG_INT_STATUS, //intterupt status register,if no exist then -1
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422 .range = {-32768,32768}, //range
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423 .trig = IRQF_TRIGGER_HIGH|IRQF_ONESHOT,
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424 .active = sensor_active,
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425 .init = sensor_init,
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426 .report = sensor_report_value,
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429 /****************operate according to sensor chip:end************/
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431 //function name should not be changed
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432 static struct sensor_operate *gyro_get_ops(void)
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434 return &gyro_ewtsa_ops;
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438 static int __init gyro_ewtsa_init(void)
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440 struct sensor_operate *ops = gyro_get_ops();
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442 int type = ops->type;
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443 result = sensor_register_slave(type, NULL, NULL, gyro_get_ops);
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447 static void __exit gyro_ewtsa_exit(void)
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449 struct sensor_operate *ops = gyro_get_ops();
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450 int type = ops->type;
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451 sensor_unregister_slave(type, NULL, NULL, gyro_get_ops);
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455 module_init(gyro_ewtsa_init);
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456 module_exit(gyro_ewtsa_exit);
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