// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2019 MediaTek Inc. */ /* * DW9718SAF voice coil motor driver * * */ #include #include #include #include #include "lens_info.h" #define AF_DRVNAME "DW9718SAF_DRV" #define AF_I2C_SLAVE_ADDR 0x18 #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; static int i2c_read(u8 a_u2Addr, u8 *a_puBuff) { int i4RetValue = 0; char puReadCmd[1] = {(char)(a_u2Addr)}; g_pstAF_I2Cclient->addr = AF_I2C_SLAVE_ADDR; g_pstAF_I2Cclient->addr = g_pstAF_I2Cclient->addr >> 1; i4RetValue = i2c_master_send(g_pstAF_I2Cclient, puReadCmd, 1); if (i4RetValue < 0) { LOG_INF(" I2C write failed!!\n"); return -1; } i4RetValue = i2c_master_recv(g_pstAF_I2Cclient, (char *)a_puBuff, 1); if (i4RetValue < 0) { LOG_INF(" I2C read failed!!\n"); return -1; } return 0; } static u8 read_data(u8 addr) { u8 get_byte = 0xFF; i2c_read(addr, &get_byte); return get_byte; } static int s4AF_WriteReg(u16 a_u2Data) { int i4RetValue = 0; char puSendCmd[3] = {0x02, (char)(a_u2Data >> 8), (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, puSendCmd, 3); 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) { u8 data = 0xFF; int i4RetValue = 0; char puSendCmd0[2] = {0x00, 0x01}; /* Reset */ char puSendCmd1[2] = {0x00, 0x00}; /* Power on */ char puSendCmd2[2] = {0x02, 0x00}; char puSendCmd3[2] = {0x03, 0xD2}; /* Move 210 Code */ char puSendCmd4[2] = {0x01, 0x39}; /* sac3 Mode */ char puSendCmd5[2] = {0x05, 0x7C}; /* SAC period Setting */ g_pstAF_I2Cclient->addr = AF_I2C_SLAVE_ADDR; g_pstAF_I2Cclient->addr = g_pstAF_I2Cclient->addr >> 1; i4RetValue = i2c_master_send(g_pstAF_I2Cclient, puSendCmd0, 2); if (i4RetValue < 0) { LOG_INF("I2C send 0x00 failed!!\n"); return -1; } mdelay(1); i4RetValue = i2c_master_send(g_pstAF_I2Cclient, puSendCmd1, 2); if (i4RetValue < 0) { LOG_INF("I2C send 0x00 failed!!\n"); return -1; } data = read_data(0x00); LOG_INF("Addr:0x00 Data:0x%x\n", data); if (data != 0x0) return -1; mdelay(1); i4RetValue = i2c_master_send(g_pstAF_I2Cclient, puSendCmd2, 2); if (i4RetValue < 0) { LOG_INF("I2C send 0x02 failed!!\n"); return -1; } mdelay(1); i4RetValue = i2c_master_send(g_pstAF_I2Cclient, puSendCmd3, 2); if (i4RetValue < 0) { LOG_INF("I2C send 0x03 failed!!\n"); return -1; } mdelay(1); i4RetValue = i2c_master_send(g_pstAF_I2Cclient, puSendCmd4, 2); if (i4RetValue < 0) { LOG_INF("I2C send 0x01 failed!!\n"); return -1; } mdelay(1); i4RetValue = i2c_master_send(g_pstAF_I2Cclient, puSendCmd5, 2); if (i4RetValue < 0) { LOG_INF("I2C send 0x05 failed!!\n"); return -1; } LOG_INF("driver init success!!\n"); 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 DW9718SAF_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 DW9718SAF_Release(struct inode *a_pstInode, struct file *a_pstFile) { /* power down mode */ char puSendCmd[2] = {0x00, 0x01}; LOG_INF("Start\n"); if (*g_pAF_Opened == 2) { LOG_INF("apply +\n"); LOG_INF("apply -\n"); } if (*g_pAF_Opened) { LOG_INF("Free\n"); spin_lock(g_pAF_SpinLock); *g_pAF_Opened = 0; spin_unlock(g_pAF_SpinLock); } if (i2c_master_send(g_pstAF_I2Cclient, puSendCmd, 2) < 0) LOG_INF("DW9718S Power down mode fail!\n"); LOG_INF("End\n"); return 0; } int DW9718SAF_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) { int i4RetValue = 0; u8 data = 0x0; char puSendCmd[2] = {0x00, 0x01}; g_pstAF_I2Cclient->addr = AF_I2C_SLAVE_ADDR; g_pstAF_I2Cclient->addr = g_pstAF_I2Cclient->addr >> 1; i4RetValue = i2c_master_send(g_pstAF_I2Cclient, puSendCmd, 2); data = read_data(0x00); LOG_INF("Addr:0x00 Data:0x%x\n", data); LOG_INF("apply - %d\n", i4RetValue); if (i4RetValue < 0) return -1; } LOG_INF("-\n"); return 0; } int DW9718SAF_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 DW9718SAF_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; }