316 lines
6.3 KiB
C
316 lines
6.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2019 MediaTek Inc.
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*/
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/*
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* LC898214AF voice coil motor driver
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*
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*
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*/
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#include <linux/delay.h>
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#include <linux/fs.h>
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#include <linux/i2c.h>
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#include <linux/uaccess.h>
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#include "lens_info.h"
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#define AF_DRVNAME "LC898214AF_DRV"
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#define AF_I2C_SLAVE_ADDR 0xE4
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#define EEPROM_I2C_SLAVE_ADDR 0xA0
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#define AF_DEBUG
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#ifdef AF_DEBUG
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#define LOG_INF(format, args...) \
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pr_debug(AF_DRVNAME " [%s] " format, __func__, ##args)
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#else
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#define LOG_INF(format, args...)
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#endif
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static struct i2c_client *g_pstAF_I2Cclient;
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static int *g_pAF_Opened;
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static spinlock_t *g_pAF_SpinLock;
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static unsigned long g_u4AF_INF;
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static unsigned long g_u4AF_MACRO = 1023;
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static unsigned long g_u4CurrPosition;
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#define Min_Pos 0
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#define Max_Pos 1023
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static signed short Hall_Max = 0x4500;
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static signed short Hall_Min = 0xBB00;
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static int s4EEPROM_ReadReg(u16 addr, u16 *data)
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{
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u8 u8data[2];
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u8 pu_send_cmd[2] = {(u8)(addr >> 8), (u8)(addr & 0xFF)};
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g_pstAF_I2Cclient->addr = (EEPROM_I2C_SLAVE_ADDR) >> 1;
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if (i2c_master_send(g_pstAF_I2Cclient, pu_send_cmd, 2) < 0) {
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LOG_INF("read I2C send failed!!\n");
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return -1;
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}
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if (i2c_master_recv(g_pstAF_I2Cclient, u8data, 2) < 0) {
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LOG_INF("EEPROM_ReadReg failed!!\n");
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return -1;
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}
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LOG_INF("u8data[0] = 0x%x\n", u8data[0]);
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LOG_INF("u8data[1] = 0x%x\n", u8data[1]);
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*data = u8data[1] << 8 | u8data[0];
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LOG_INF("EEPROM 0x%x, 0x%x\n", addr, *data);
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return 0;
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}
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static int s4AF_ReadReg(u8 a_uAddr, u8 *a_uData)
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{
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g_pstAF_I2Cclient->addr = (AF_I2C_SLAVE_ADDR) >> 1;
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if (i2c_master_send(g_pstAF_I2Cclient, &a_uAddr, 1) < 0) {
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LOG_INF("ReadI2C send failed!!\n");
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return -1;
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}
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if (i2c_master_recv(g_pstAF_I2Cclient, a_uData, 1) < 0) {
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LOG_INF("ReadI2C recv failed!!\n");
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return -1;
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}
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/* LOG_INF("ReadI2C 0x%x, 0x%x\n", a_uAddr, *a_uData); */
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return 0;
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}
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static int s4AF_WriteReg(u8 a_uLength, u8 a_uAddr, u16 a_u2Data)
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{
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u8 puSendCmd[2] = {a_uAddr, (u8)(a_u2Data & 0xFF)};
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u8 puSendCmd2[3] = {a_uAddr, (u8)((a_u2Data >> 8) & 0xFF),
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(u8)(a_u2Data & 0xFF)};
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g_pstAF_I2Cclient->addr = (AF_I2C_SLAVE_ADDR) >> 1;
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if (a_uLength == 0) {
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if (i2c_master_send(g_pstAF_I2Cclient, puSendCmd, 2) < 0) {
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LOG_INF("WriteI2C failed!!\n");
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return -1;
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}
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} else if (a_uLength == 1) {
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if (i2c_master_send(g_pstAF_I2Cclient, puSendCmd2, 3) < 0) {
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LOG_INF("WriteI2C 2 failed!!\n");
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return -1;
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}
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}
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return 0;
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}
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static unsigned short AF_convert(int position)
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{
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return (((Max_Pos - position) * (unsigned short)(Hall_Max - Hall_Min) /
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(Max_Pos - Min_Pos)) + Hall_Min) & 0xFFFF;
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}
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static inline int getAFInfo(__user struct stAF_MotorInfo *pstMotorInfo)
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{
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struct stAF_MotorInfo stMotorInfo;
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stMotorInfo.u4MacroPosition = g_u4AF_MACRO;
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stMotorInfo.u4InfPosition = g_u4AF_INF;
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stMotorInfo.u4CurrentPosition = g_u4CurrPosition;
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stMotorInfo.bIsSupportSR = 1;
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stMotorInfo.bIsMotorMoving = 1;
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if (*g_pAF_Opened >= 1)
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stMotorInfo.bIsMotorOpen = 1;
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else
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stMotorInfo.bIsMotorOpen = 0;
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if (copy_to_user(pstMotorInfo, &stMotorInfo,
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sizeof(struct stAF_MotorInfo)))
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LOG_INF("copy to user failed when getting motor information\n");
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return 0;
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}
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/* initAF include driver initialization and standby mode */
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static int initAF(void)
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{
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LOG_INF("+\n");
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if (*g_pAF_Opened == 1) {
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unsigned char Temp;
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unsigned short Data;
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unsigned short Cnt;
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s4EEPROM_ReadReg(0x0F63, &Data);
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if (Data > 0 && Data < 0xFFFF)
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Hall_Max = Data;
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s4EEPROM_ReadReg(0x0F65, &Data);
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if (Data > 0 && Data < 0xFFFF)
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Hall_Min = Data;
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s4AF_ReadReg(0xF0, &Temp);
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if (Temp != 0x42) {
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LOG_INF("Check Read F0h fail\n");
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return -1;
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}
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s4AF_WriteReg(0, 0xE0, 0x1);
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Cnt = 0;
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while (1) {
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msleep(20);
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s4AF_ReadReg(0xE0, &Temp);
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Cnt++;
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if (Temp == 0 || Cnt > 3)
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break;
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}
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spin_lock(g_pAF_SpinLock);
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*g_pAF_Opened = 2;
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spin_unlock(g_pAF_SpinLock);
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}
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LOG_INF("-\n");
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return 0;
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}
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/* moveAF only use to control moving the motor */
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static inline int moveAF(unsigned long a_u4Position)
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{
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int ret = 0;
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if (s4AF_WriteReg(1, 0xA0, (unsigned short)AF_convert(
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a_u4Position)) == 0) {
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g_u4CurrPosition = a_u4Position;
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ret = 0;
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} else {
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LOG_INF("set I2C failed when moving the motor\n");
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ret = -1;
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}
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return ret;
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}
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static inline int setAFInf(unsigned long a_u4Position)
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{
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spin_lock(g_pAF_SpinLock);
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g_u4AF_INF = a_u4Position;
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spin_unlock(g_pAF_SpinLock);
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return 0;
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}
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static inline int setAFMacro(unsigned long a_u4Position)
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{
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spin_lock(g_pAF_SpinLock);
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g_u4AF_MACRO = a_u4Position;
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spin_unlock(g_pAF_SpinLock);
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return 0;
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}
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/* ////////////////////////////////////////////////////////////// */
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long LC898214AF_Ioctl(struct file *a_pstFile, unsigned int a_u4Command,
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unsigned long a_u4Param)
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{
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long i4RetValue = 0;
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switch (a_u4Command) {
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case AFIOC_G_MOTORINFO:
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i4RetValue =
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getAFInfo((__user struct stAF_MotorInfo *)(a_u4Param));
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break;
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case AFIOC_T_MOVETO:
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i4RetValue = moveAF(a_u4Param);
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break;
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case AFIOC_T_SETINFPOS:
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i4RetValue = setAFInf(a_u4Param);
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break;
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case AFIOC_T_SETMACROPOS:
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i4RetValue = setAFMacro(a_u4Param);
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break;
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default:
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LOG_INF("No CMD\n");
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i4RetValue = -EPERM;
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break;
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}
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return i4RetValue;
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}
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/* Main jobs: */
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/* 1.Deallocate anything that "open" allocated in private_data. */
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/* 2.Shut down the device on last close. */
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/* 3.Only called once on last time. */
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/* Q1 : Try release multiple times. */
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int LC898214AF_Release(struct inode *a_pstInode, struct file *a_pstFile)
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{
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LOG_INF("Start\n");
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if (*g_pAF_Opened == 2) {
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LOG_INF("Wait\n");
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LOG_INF("Close\n");
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}
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if (*g_pAF_Opened) {
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LOG_INF("Free\n");
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spin_lock(g_pAF_SpinLock);
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*g_pAF_Opened = 0;
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spin_unlock(g_pAF_SpinLock);
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}
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LOG_INF("End\n");
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return 0;
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}
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int LC898214AF_SetI2Cclient(struct i2c_client *pstAF_I2Cclient,
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spinlock_t *pAF_SpinLock, int *pAF_Opened)
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{
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g_pstAF_I2Cclient = pstAF_I2Cclient;
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g_pAF_SpinLock = pAF_SpinLock;
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g_pAF_Opened = pAF_Opened;
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initAF();
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return 1;
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}
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int LC898214AF_GetFileName(unsigned char *pFileName)
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{
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#if SUPPORT_GETTING_LENS_FOLDER_NAME
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char FilePath[256];
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char *FileString;
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sprintf(FilePath, "%s", __FILE__);
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FileString = strrchr(FilePath, '/');
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*FileString = '\0';
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FileString = (strrchr(FilePath, '/') + 1);
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strncpy(pFileName, FileString, AF_MOTOR_NAME);
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LOG_INF("FileName : %s\n", pFileName);
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#else
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pFileName[0] = '\0';
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#endif
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return 1;
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}
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