unplugged-kernel/drivers/misc/mediatek/lens/mtk/main/common/bu63165af/BU63165AF.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2019 MediaTek Inc.
 */


/*
 * BU63165AF voice coil motor driver
 *
 *
 */

#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/i2c.h>
#include <linux/uaccess.h>

#include "OIS_head.h"
#include "lens_info.h"

#define AF_DRVNAME "BU63165AF_DRV"
#define AF_I2C_SLAVE_ADDR 0x1c
#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;

int s4EEPROM_ReadReg_BU63165AF(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("s4EEPROM_ReadReg2 0x%x, 0x%x\n", addr, *data);

	return 0;
}

int s4AF_WriteReg_BU63165AF(u16 i2c_id, u8 *a_pSendData, u16 a_sizeSendData)
{
	int i4RetValue = 0;

	spin_lock(g_pAF_SpinLock);
	g_pstAF_I2Cclient->addr = i2c_id >> 1;
	spin_unlock(g_pAF_SpinLock);

	i4RetValue =
		i2c_master_send(g_pstAF_I2Cclient, a_pSendData, a_sizeSendData);

	if (i4RetValue != a_sizeSendData) {
		LOG_INF("I2C send failed!!, Addr = 0x%x, Data = 0x%x\n",
			a_pSendData[0], a_pSendData[1]);
		return -1;
	}

	return 0;
}

int s4AF_ReadReg_BU63165AF(u16 i2c_id, u8 *a_pSendData, u16 a_sizeSendData,
			   u8 *a_pRecvData, u16 a_sizeRecvData)
{
	int i4RetValue;
	struct i2c_msg msg[2];

	spin_lock(g_pAF_SpinLock);
	g_pstAF_I2Cclient->addr = i2c_id >> 1;
	spin_unlock(g_pAF_SpinLock);

	msg[0].addr = g_pstAF_I2Cclient->addr;
	msg[0].flags = 0;
	msg[0].len = a_sizeSendData;
	msg[0].buf = a_pSendData;

	msg[1].addr = g_pstAF_I2Cclient->addr;
	msg[1].flags = I2C_M_RD;
	msg[1].len = a_sizeRecvData;
	msg[1].buf = a_pRecvData;

	i4RetValue =
		i2c_transfer(g_pstAF_I2Cclient->adapter, msg, ARRAY_SIZE(msg));

	if (i4RetValue != 2) {
		LOG_INF("I2C Read 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) {
		Main_OIS();
		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 (setVCMPos((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;
}

static inline int setAFPara(__user struct stAF_MotorCmd *pstMotorCmd)
{
	struct stAF_MotorCmd stMotorCmd;

	if (copy_from_user(&stMotorCmd, pstMotorCmd, sizeof(stMotorCmd)))
		LOG_INF("copy to user failed when getting motor command\n");

	LOG_INF("Motor CmdID : %x\n", stMotorCmd.u4CmdID);

	LOG_INF("Motor Param : %x\n", stMotorCmd.u4Param);

	switch (stMotorCmd.u4CmdID) {
	case 1:
		setOISMode((int)stMotorCmd.u4Param); /* 1 : disable */
		break;
	}

	return 0;
}

/* ////////////////////////////////////////////////////////////// */
long BU63165AF_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;

	case AFIOC_S_SETPARA:
		i4RetValue =
			setAFPara((__user struct stAF_MotorCmd *)(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 BU63165AF_Release(struct inode *a_pstInode, struct file *a_pstFile)
{
	LOG_INF("Start\n");

	if (*g_pAF_Opened == 2) {
		LOG_INF("Wait\n");
		OIS_Standby();
		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 BU63165AF_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;

	LOG_INF("SetI2Cclient\n");

	initAF();

	return 1;
}

int BU63165AF_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;
}