// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2019 MediaTek Inc. */ /* * AD5823AF voice coil motor driver * * */ #include #include #include #include #include "lens_info.h" #define AF_DRVNAME "AD5823AF_DRV" #define AF_I2C_SLAVE_ADDR 0x0C #define AF_DEBUG #ifdef AF_DEBUG #define LOG_INF(format, args...) \ pr_debug(AF_DRVNAME " [%s] " format, __func__, ##args) #else #define LOG_INF(format, args...) #endif static struct i2c_client *g_pstAF_I2Cclient; static int *g_pAF_Opened; static spinlock_t *g_pAF_SpinLock; static unsigned long g_u4AF_INF; static unsigned long g_u4AF_MACRO = 1023; static unsigned long g_u4CurrPosition; static int s4AF_ReadReg(unsigned short *a_pu2Result) { int i4RetValue = 0; char pBuff[2]; char VCMMSB[1] = {(char)(0x04)}; char VCMLSB[1] = {(char)(0x05)}; g_pstAF_I2Cclient->addr = AF_I2C_SLAVE_ADDR; g_pstAF_I2Cclient->addr = g_pstAF_I2Cclient->addr >> 1; /* Read MSB */ i4RetValue = i2c_master_send(g_pstAF_I2Cclient, VCMMSB, 1); if (i4RetValue < 0) { LOG_INF("I2C read MSB send failed!!\n"); return -1; } i4RetValue = i2c_master_recv(g_pstAF_I2Cclient, &pBuff[1], 1); if (i4RetValue < 0) { LOG_INF("I2C read MSB recv failed!!\n"); return -1; } /* Read LSB */ i4RetValue = i2c_master_send(g_pstAF_I2Cclient, VCMLSB, 1); if (i4RetValue < 0) { LOG_INF("I2C read LSB send failed!!\n"); return -1; } i4RetValue = i2c_master_recv(g_pstAF_I2Cclient, &pBuff[0], 1); if (i4RetValue < 0) { LOG_INF("I2C read LSB recv failed!!\n"); return -1; } *a_pu2Result = ((u16)pBuff[0] + (u16)(pBuff[1] << 8)); return 0; } static int s4AF_WriteReg(u16 a_u2Data) { int i4RetValue = 0; /* 0x04[1:0] VCM MSB data */ /* 0x05[7:0] VCM LSB data */ char VCMMSB[2] = {(char)(0x04), (char)((a_u2Data >> 8) & 0x03)}; char VCMLSB[2] = {(char)(0x05), (char)(a_u2Data & 0xFF)}; g_pstAF_I2Cclient->addr = AF_I2C_SLAVE_ADDR; g_pstAF_I2Cclient->addr = g_pstAF_I2Cclient->addr >> 1; i4RetValue = i2c_master_send(g_pstAF_I2Cclient, VCMMSB, 2); i4RetValue = i2c_master_send(g_pstAF_I2Cclient, VCMLSB, 2); if (i4RetValue < 0) { LOG_INF("I2C send failed!!\n"); return -1; } return 0; } static inline int getAFInfo(__user struct stAF_MotorInfo *pstMotorInfo) { struct stAF_MotorInfo stMotorInfo; stMotorInfo.u4MacroPosition = g_u4AF_MACRO; stMotorInfo.u4InfPosition = g_u4AF_INF; stMotorInfo.u4CurrentPosition = g_u4CurrPosition; stMotorInfo.bIsSupportSR = 1; stMotorInfo.bIsMotorMoving = 1; if (*g_pAF_Opened >= 1) stMotorInfo.bIsMotorOpen = 1; else stMotorInfo.bIsMotorOpen = 0; if (copy_to_user(pstMotorInfo, &stMotorInfo, sizeof(struct stAF_MotorInfo))) LOG_INF("copy to user failed when getting motor information\n"); return 0; } /* initAF include driver initialization and standby mode */ static int initAF(void) { LOG_INF("+\n"); if (*g_pAF_Opened == 1) { int i4RetValue = 0; char Mode[2] = {(char)(0x02), (char)(0x01)}; char MoveTime[2] = {(char)(0x03), (char)(0x4B)}; char VCMMSB[2] = {(char)(0x04), (char)(0x05)}; char VCMLSB[2] = {(char)(0x05), (char)(0x32)}; LOG_INF("mode_init : 0x02\n"); g_pstAF_I2Cclient->addr = AF_I2C_SLAVE_ADDR; g_pstAF_I2Cclient->addr = g_pstAF_I2Cclient->addr >> 1; i4RetValue = i2c_master_send(g_pstAF_I2Cclient, Mode, 2); i4RetValue = i2c_master_send(g_pstAF_I2Cclient, MoveTime, 2); i4RetValue = i2c_master_send(g_pstAF_I2Cclient, VCMMSB, 2); i4RetValue = i2c_master_send(g_pstAF_I2Cclient, VCMLSB, 2); spin_lock(g_pAF_SpinLock); *g_pAF_Opened = 2; spin_unlock(g_pAF_SpinLock); } LOG_INF("-\n"); return 0; } /* moveAF only use to control moving the motor */ static inline int moveAF(unsigned long a_u4Position) { int ret = 0; if (s4AF_WriteReg((unsigned short)a_u4Position) == 0) { g_u4CurrPosition = a_u4Position; ret = 0; } else { LOG_INF("set I2C failed when moving the motor\n"); ret = -1; } return ret; } static inline int setAFInf(unsigned long a_u4Position) { spin_lock(g_pAF_SpinLock); g_u4AF_INF = a_u4Position; spin_unlock(g_pAF_SpinLock); return 0; } static inline int setAFMacro(unsigned long a_u4Position) { spin_lock(g_pAF_SpinLock); g_u4AF_MACRO = a_u4Position; spin_unlock(g_pAF_SpinLock); return 0; } /* ////////////////////////////////////////////////////////////// */ long AD5823AF_Ioctl(struct file *a_pstFile, unsigned int a_u4Command, unsigned long a_u4Param) { long i4RetValue = 0; switch (a_u4Command) { case AFIOC_G_MOTORINFO: i4RetValue = getAFInfo((__user struct stAF_MotorInfo *)(a_u4Param)); break; case AFIOC_T_MOVETO: i4RetValue = moveAF(a_u4Param); break; case AFIOC_T_SETINFPOS: i4RetValue = setAFInf(a_u4Param); break; case AFIOC_T_SETMACROPOS: i4RetValue = setAFMacro(a_u4Param); break; default: LOG_INF("No CMD\n"); i4RetValue = -EPERM; break; } return i4RetValue; } /* Main jobs: */ /* 1.Deallocate anything that "open" allocated in private_data. */ /* 2.Shut down the device on last close. */ /* 3.Only called once on last time. */ /* Q1 : Try release multiple times. */ int AD5823AF_Release(struct inode *a_pstInode, struct file *a_pstFile) { LOG_INF("Start\n"); if (*g_pAF_Opened == 2) { LOG_INF("Wait\n"); s4AF_WriteReg(200); msleep(20); s4AF_WriteReg(100); msleep(20); } if (*g_pAF_Opened) { LOG_INF("Free\n"); spin_lock(g_pAF_SpinLock); *g_pAF_Opened = 0; spin_unlock(g_pAF_SpinLock); } LOG_INF("End\n"); return 0; } int AD5823AF_SetI2Cclient(struct i2c_client *pstAF_I2Cclient, spinlock_t *pAF_SpinLock, int *pAF_Opened) { g_pstAF_I2Cclient = pstAF_I2Cclient; g_pAF_SpinLock = pAF_SpinLock; g_pAF_Opened = pAF_Opened; initAF(); return 1; } int AD5823AF_GetFileName(unsigned char *pFileName) { #if SUPPORT_GETTING_LENS_FOLDER_NAME char FilePath[256]; char *FileString; sprintf(FilePath, "%s", __FILE__); FileString = strrchr(FilePath, '/'); *FileString = '\0'; FileString = (strrchr(FilePath, '/') + 1); strncpy(pFileName, FileString, AF_MOTOR_NAME); LOG_INF("FileName : %s\n", pFileName); #else pFileName[0] = '\0'; #endif return 1; }