unplugged-kernel/drivers/misc/mediatek/lens/mtk/sub/common/wv511aaf/WV511AAF.c

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



/*
 * MD218A voice coil motor driver
 *
 *
 */

#include <linux/atomic.h>
#include <linux/cdev.h>
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/uaccess.h>
#ifdef CONFIG_COMPAT
#include <linux/compat.h>
#endif

#include "lens_info.h"

#define AF_DRVNAME "WV511AAF"
#define I2C_SLAVE_ADDRESS 0x18

#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 spinlock_t *g_AF_SpinLock;
static struct i2c_client *g_pstAF_I2Cclient;
static int *g_s4AF_Opened;

static int g_sr;

static unsigned long g_u4AF_INF;
static unsigned long g_u4AF_MACRO = 1023;
static unsigned long g_u4CurrPosition;


static int s4AF_WriteReg(u16 a_u2Data)
{
	int i4RetValue = 0;

	char puSendCmd[2] = {(char)(a_u2Data >> 4),
			     (char)((a_u2Data & 0xF) << 4)};

	/* LOG_INF("g_sr %d, write %d\n", g_sr, a_u2Data); */
	/* g_pstAF_I2Cclient->ext_flag |= I2C_A_FILTER_MSG; */
	i4RetValue = i2c_master_send(g_pstAF_I2Cclient, puSendCmd, 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_s4AF_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;
}

#ifdef LensdrvCM3
static inline int getAFMETA(__user stWV511AAF_MotorMETAInfo *pstMotorMETAInfo)
{
	stWV511AAF_MotorMETAInfo stMotorMETAInfo;

	stMotorMETAInfo.Aperture = 2.8; /* fn */
	stMotorMETAInfo.Facing = 1;
	stMotorMETAInfo.FilterDensity = 1;   /* X */
	stMotorMETAInfo.FocalDistance = 1.0; /* diopters */
	stMotorMETAInfo.FocalLength = 34.0;  /* mm */
	stMotorMETAInfo.FocusRange = 1.0;    /* diopters */
	stMotorMETAInfo.InfoAvalibleApertures = 2.8;
	stMotorMETAInfo.InfoAvalibleFilterDensity = 1;
	stMotorMETAInfo.InfoAvalibleFocalLength = 34.0;
	stMotorMETAInfo.InfoAvalibleHypeDistance = 1.0;
	stMotorMETAInfo.InfoAvalibleMinFocusDistance = 1.0;
	stMotorMETAInfo.InfoAvalibleOptStabilization = 0;
	stMotorMETAInfo.OpticalAxisAng[0] = 0.0;
	stMotorMETAInfo.OpticalAxisAng[1] = 0.0;
	stMotorMETAInfo.Position[0] = 0.0;
	stMotorMETAInfo.Position[1] = 0.0;
	stMotorMETAInfo.Position[2] = 0.0;
	stMotorMETAInfo.State = 0;
	stMotorMETAInfo.u4OIS_Mode = 0;

	if (copy_to_user(pstMotorMETAInfo, &stMotorMETAInfo,
			 sizeof(stWV511AAF_MotorMETAInfo)))
		LOG_INF("copy to user failed when getting motor information\n");

	return 0;
}
#endif

/* initAF include driver initialization and standby mode */
static int initAF(void)
{
	LOG_INF("+\n");

	if (*g_s4AF_Opened == 1) {

		spin_lock(g_AF_SpinLock);
		g_sr = 3;
		*g_s4AF_Opened = 2;
		spin_unlock(g_AF_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_AF_SpinLock);
	g_u4AF_INF = a_u4Position;
	spin_unlock(g_AF_SpinLock);
	return 0;
}

static inline int setAFMacro(unsigned long a_u4Position)
{
	spin_lock(g_AF_SpinLock);
	g_u4AF_MACRO = a_u4Position;
	spin_unlock(g_AF_SpinLock);
	return 0;
}

/* ////////////////////////////////////////////////////////////// */
long WV511AAF_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;
#ifdef LensdrvCM3
	case WV511AAFIOC_G_MOTORMETAINFO:
		i4RetValue =
			getAFMETA((__user struct stAF_MotorInfo *)(a_u4Param));
		break;
#endif
	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 WV511AAF_Release(struct inode *a_pstInode, struct file *a_pstFile)
{
	LOG_INF("Start\n");

	if (*g_s4AF_Opened == 2) {
		spin_lock(g_AF_SpinLock);
		g_sr = 5;
		spin_unlock(g_AF_SpinLock);
		s4AF_WriteReg(200);
		msleep(20);
		s4AF_WriteReg(100);
		msleep(20);
	}

	if (*g_s4AF_Opened) {
		LOG_INF("Free\n");

		spin_lock(g_AF_SpinLock);
		*g_s4AF_Opened = 0;
		spin_unlock(g_AF_SpinLock);
	}

	LOG_INF("End\n");

	return 0;
}

int WV511AAF_SetI2Cclient(struct i2c_client *pstAF_I2Cclient,
			  spinlock_t *pAF_SpinLock, int *pAF_Opened)
{
	g_pstAF_I2Cclient = pstAF_I2Cclient;
	g_AF_SpinLock = pAF_SpinLock;
	g_s4AF_Opened = pAF_Opened;

	initAF();

	return 1;
}

int WV511AAF_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;
}