// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2019 MediaTek Inc. */ /* * LC898214AF voice coil motor driver * * */ #include #include #include #include #include "lens_info.h" #define AF_DRVNAME "LC898214AF_DRV" #define AF_I2C_SLAVE_ADDR 0xE4 #define EEPROM_I2C_SLAVE_ADDR 0xA0 #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; #define Min_Pos 0 #define Max_Pos 1023 static signed short Hall_Max = 0x4500; static signed short Hall_Min = 0xBB00; static int s4EEPROM_ReadReg(u16 addr, u16 *data) { u8 u8data[2]; u8 pu_send_cmd[2] = {(u8)(addr >> 8), (u8)(addr & 0xFF)}; g_pstAF_I2Cclient->addr = (EEPROM_I2C_SLAVE_ADDR) >> 1; if (i2c_master_send(g_pstAF_I2Cclient, pu_send_cmd, 2) < 0) { LOG_INF("read I2C send failed!!\n"); return -1; } if (i2c_master_recv(g_pstAF_I2Cclient, u8data, 2) < 0) { LOG_INF("EEPROM_ReadReg failed!!\n"); return -1; } LOG_INF("u8data[0] = 0x%x\n", u8data[0]); LOG_INF("u8data[1] = 0x%x\n", u8data[1]); *data = u8data[1] << 8 | u8data[0]; LOG_INF("EEPROM 0x%x, 0x%x\n", addr, *data); return 0; } 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("ReadI2C 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; 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 unsigned short AF_convert(int position) { return (((Max_Pos - position) * (unsigned short)(Hall_Max - Hall_Min) / (Max_Pos - Min_Pos)) + Hall_Min) & 0xFFFF; } 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) { unsigned char Temp; unsigned short Data; unsigned short Cnt; s4EEPROM_ReadReg(0x0F63, &Data); if (Data > 0 && Data < 0xFFFF) Hall_Max = Data; s4EEPROM_ReadReg(0x0F65, &Data); if (Data > 0 && Data < 0xFFFF) Hall_Min = Data; s4AF_ReadReg(0xF0, &Temp); if (Temp != 0x42) { LOG_INF("Check Read F0h fail\n"); return -1; } s4AF_WriteReg(0, 0xE0, 0x1); Cnt = 0; while (1) { msleep(20); s4AF_ReadReg(0xE0, &Temp); Cnt++; if (Temp == 0 || Cnt > 3) break; } 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(1, 0xA0, (unsigned short)AF_convert( 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 LC898214AF_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 LC898214AF_Release(struct inode *a_pstInode, struct file *a_pstFile) { LOG_INF("Start\n"); if (*g_pAF_Opened == 2) { LOG_INF("Wait\n"); LOG_INF("Close\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 0; } int LC898214AF_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 LC898214AF_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; }