// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2019 MediaTek Inc. */ /* * LC898229AF voice coil motor driver * * */ #include #include #include #include #include #include "lens_info.h" #define AF_DRVNAME "LC898229AF_DRV" #define AF_I2C_SLAVE_ADDR 0xE4 #define AF_DEBUG #ifdef AF_DEBUG #define LOG_INF(format, args...) \ pr_info(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; #define Min_Pos 0 #define Max_Pos 1023 static int s4AF_ReadReg(u8 a_uAddr, u8 *a_uData) { g_pstAF_I2Cclient->addr = (AF_I2C_SLAVE_ADDR) >> 1; if (i2c_master_send(g_pstAF_I2Cclient, &a_uAddr, 1) < 0) { LOG_INF("ReadI2C send failed!!\n"); return -1; } if (i2c_master_recv(g_pstAF_I2Cclient, a_uData, 1) < 0) { LOG_INF("ReadI2C recv failed!!\n"); return -1; } /* LOG_INF("RDI2C 0x%x, 0x%x\n", a_uAddr, *a_uData); */ return 0; } static int s4AF_WriteReg(u8 a_uLength, u8 a_uAddr, u16 a_u2Data) { u8 puSendCmd[2] = {a_uAddr, (u8)(a_u2Data & 0xFF)}; u8 puSendCmd2[3] = {a_uAddr, (u8)((a_u2Data >> 8) & 0xFF), (u8)(a_u2Data & 0xFF)}; g_pstAF_I2Cclient->addr = (AF_I2C_SLAVE_ADDR) >> 1; /* LOG_INF("WRI2C 0x%04x, 0x%x\n", a_uAddr, a_u2Data); */ if (a_uLength == 0) { if (i2c_master_send(g_pstAF_I2Cclient, puSendCmd, 2) < 0) { LOG_INF("WriteI2C failed!!\n"); return -1; } } else if (a_uLength == 1) { if (i2c_master_send(g_pstAF_I2Cclient, puSendCmd2, 3) < 0) { LOG_INF("WriteI2C 2 failed!!\n"); return -1; } } return 0; } static int setPosition(unsigned short UsPosition) { unsigned short TarPos; unsigned char UcPosH; unsigned char UcPosL; unsigned int i4RetValue = 0; TarPos = UsPosition; /* LOG_INF("DAC(%04d) -> %03x\n", UsPosition, TarPos); */ UcPosH = (unsigned char)(TarPos >> 8); UcPosL = (unsigned char)(TarPos & 0x00FF); i4RetValue = s4AF_WriteReg(0, 0x84, UcPosH); if (i4RetValue != 0) return -1; i4RetValue = s4AF_WriteReg(0, 0x85, UcPosL); /* set target position */ return i4RetValue; } 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"); //wait driver ic ready mdelay(5); if (*g_pAF_Opened == 1) { int i4RetValue = 0; int ret = 0; int cnt = 0; unsigned char Temp; s4AF_ReadReg(0xF0, &Temp); LOG_INF("Check HW version: %x\n", Temp); if (Temp == 0xA5) { s4AF_WriteReg(0, 0xE0, 0x01); while (1) { mdelay(20); ret = s4AF_ReadReg(0xB3, &Temp); LOG_INF("Check LSI wake up or not: %x\n", Temp); if (Temp == 0 && ret == 0) { i4RetValue = 1; break; } if (cnt >= 20) break; cnt++; } mdelay(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 (setPosition((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 LC898229AF_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 LC898229AF_Release(struct inode *a_pstInode, struct file *a_pstFile) { int Ret = 0; LOG_INF("Start\n"); 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 Ret; } int LC898229AF_PowerDown(struct i2c_client *pstAF_I2Cclient, int *pAF_Opened) { g_pstAF_I2Cclient = pstAF_I2Cclient; g_pAF_Opened = pAF_Opened; LOG_INF("+\n"); if (*g_pAF_Opened == 0) { LOG_INF("Set power donw +\n"); LOG_INF("Set power donw -\n"); } LOG_INF("-\n"); return 0; } int LC898229AF_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 LC898229AF_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; }