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#include <linux/poll.h>
#include <linux/miscdevice.h>
#include <linux/slab.h>
#include "vpapi_dev.h"

/* Defines */
#define GET_DEV_STATUS(deviceId)	vpapi_dev_status[deviceId]
#define GET_LINE_STATUS(lineId)		vpapi_line_status[lineId]
#define REGISTER_DEVICE(deviceId)	\
	vpapi_dev_status[deviceId] = 1;
#define REGISTER_LINE(lineId)		\
	vpapi_line_status[lineId] = 1;

#define MAX_PROFILE_SIZE		128
#define GET_DEVICE(lineId)		(lineId/MAX_LINES_PER_DEVICE)
#define GET_LINE(lineId)		(lineId % MAX_LINES_PER_DEVICE)
#define MAX_EVENT_QUEUE_SIZE		256
#define VPAPI_TICK_TIMER_PERIOD		1
#define VPAPI_MOD_NAME                  "vpapi"

/* VE880 */
#if defined(CONFIG_ZARLINK_SLIC_VE880)

#define MAX_DEVICES			2
#define MAX_LINES			4
#define MAX_LINES_PER_DEVICE		2
	
static VpDevCtxType pDevCtx[MAX_DEVICES];
static VpLineCtxType pLineCtx[MAX_DEVICES][MAX_LINES_PER_DEVICE];
static Vp880DeviceObjectType pDevObj[MAX_DEVICES];
static Vp880LineObjectType pLineObj[MAX_DEVICES][MAX_LINES_PER_DEVICE];

/* VE890 */
#elif defined(CONFIG_ZARLINK_SLIC_VE890)

#define MAX_DEVICES			1
#define MAX_LINES			1
#define MAX_LINES_PER_DEVICE		1
	
static VpDevCtxType pDevCtx[MAX_DEVICES];
static VpLineCtxType pLineCtx[MAX_DEVICES][MAX_LINES_PER_DEVICE];
static Vp890DeviceObjectType pDevObj[MAX_DEVICES];
static Vp890LineObjectType pLineObj[MAX_DEVICES][MAX_LINES_PER_DEVICE];

/* VE792 */
#elif defined(CONFIG_ZARLINK_SLIC_VE792)

#define MAX_DEVICES			4
#define MAX_LINES			32
#define MAX_LINES_PER_DEVICE		8

static VpDevCtxType pDevCtx[MAX_DEVICES];
static VpLineCtxType pLineCtx[MAX_DEVICES][MAX_LINES_PER_DEVICE];
static Vp792DeviceObjectType pDevObj[MAX_DEVICES];
static Vp792LineObjectType pLineObj[MAX_DEVICES][MAX_LINES_PER_DEVICE];

extern int BattOn(int vbhSetting, int vblSetting, int vbpSetting);
extern int BattOff(void);

#endif

static void vpapi_tick_handler(unsigned long data);
static ssize_t vpapi_read(struct file *file, char __user *buf, size_t size, loff_t * ppos);
static ssize_t vpapi_write(struct file *file, const char __user *buf, size_t size, loff_t * ppos);
static unsigned int vpapi_poll(struct file *pFile, poll_table *pPollTable);
static int vpapi_ioctl(struct inode *pInode, struct file *pFile, unsigned int cmd, unsigned long arg);
static int vpapi_open(struct inode *pInode, struct file *pFile);
static int vpapi_release(struct inode *pInode, struct file *pFile);
//static int __init vpapi_module_init(void);
//static void __exit vpapi_module_exit(void);

/* VP-API-II Dispatchers */
static int vpapi_make_dev_object(unsigned long arg);
static int vpapi_make_line_object(unsigned long arg);
static int vpapi_map_line_id(unsigned long arg);
static int vpapi_map_slac_id(unsigned long arg);
static int vpapi_free_line_context(unsigned long arg);
static int vpapi_init_device(unsigned long arg);
static int vpapi_cal_line(unsigned long arg);
static int vpapi_set_line_state(unsigned long arg);
static int vpapi_set_option(unsigned long arg);
int vpapi_get_event(unsigned long arg);
#if defined(CONFIG_ZARLINK_SLIC_VE792)
static int vpapi_batt_on(unsigned long arg);
static int vpapi_batt_off(unsigned long arg);
#endif
#if defined(CONFIG_ZARLINK_SLIC_VE880)
static int vpapi_reg_read(unsigned long arg);
static int vpapi_reg_write(unsigned long arg);
#endif

/* Enumurators */
typedef struct {
	unsigned char valid;		/* valid event */
	VpEventType vp_event;
} vpapi_event;


/* Structs */
static struct file_operations vpapi_fops = {
    owner:      THIS_MODULE,
    llseek:     NULL,
    read:       vpapi_read,
    write:      vpapi_write,
    poll:       vpapi_poll,
    ioctl:      vpapi_ioctl,
    open:       vpapi_open,
    release:    vpapi_release,
    fasync:     NULL
};

/* Globals */
static DEFINE_SPINLOCK(vpapi_lock);
static DECLARE_WAIT_QUEUE_HEAD(vpapi_wait);
static atomic_t event_count;
static atomic_t vpapi_init;
static atomic_t vpapi_in_ioctl;
static vpapi_event event_queue[MAX_EVENT_QUEUE_SIZE];
static u8 vpapi_dev_status[MAX_DEVICES];
static u8 vpapi_line_status[MAX_LINES];
static volatile u32 next_event = 0, curr_event = 0;
static struct timer_list vpapi_timer;
static u16 total_devs = 0, total_lines = 0;


static struct miscdevice vpapi_misc_dev = {
	.minor = SLICDEV_MINOR,
	.name = VPAPI_MOD_NAME,
	.fops = &vpapi_fops,
};

static ssize_t vpapi_read(struct file *file, char __user *buf, size_t size, loff_t * ppos)
{
	return 0;
}

static ssize_t vpapi_write(struct file *file, const char __user *buf, size_t size, loff_t * ppos)
{
	return 0;
}

static unsigned int vpapi_poll(struct file *pFile, poll_table *pPollTable)
{
	int mask = 0;

	poll_wait(pFile, &vpapi_wait, pPollTable);
	
	if(atomic_read(&event_count) > 0) {
		mask |= POLLPRI;
	}

	return mask;
}

static int vpapi_ioctl(struct inode *pInode, struct file *pFile, unsigned int cmd, unsigned long arg)
{
	int ret = 0;

	/* Argument checking */
	if (_IOC_TYPE(cmd) != VPAPI_MOD_IOCTL_MAGIC) {
		printk("%s: invalid VPAPI MOD Magic Num %i %i\n", __func__, _IOC_TYPE(cmd), VPAPI_MOD_IOCTL_MAGIC);
		return -ENOTTY;
	}

	if ((_IOC_NR(cmd) > VPAPI_MOD_IOCTL_MAX) || (_IOC_NR(cmd) < VPAPI_MOD_IOCTL_MIN)) {
		printk("%s: invalid VPAPI MOD IOCTL request\n", __func__);
		return -ENOTTY;
	}

	if (_IOC_DIR(cmd) & _IOC_READ) {
		ret = !access_ok(VERIFY_WRITE, (void __user*)arg, _IOC_SIZE(cmd));
	} 
	else if (_IOC_DIR(cmd) & _IOC_WRITE) {
		ret = !access_ok(VERIFY_READ, (void __user*)arg, _IOC_SIZE(cmd));
	}

	if (ret) {
		printk("%s: invalid VPAPI MOD access type %i from cmd %i\n", __func__, _IOC_DIR(cmd), cmd);
		return -EFAULT;
	}

#if defined(SLIC_TIMER_EVENT_SUPPORT)
	/* Disable timer routine processing */
	atomic_set(&vpapi_in_ioctl, 1);
#endif

	switch (cmd) {
		case VPAPI_MOD_IOX_MK_DEV_OBJ:
			//printk("ioctl: VPAPI_MOD_IOX_MK_DEV_OBJ\n");
			ret = vpapi_make_dev_object(arg);	
			break;
		
		case VPAPI_MOD_IOX_MK_LN_OBJ:
			//printk("ioctl: VPAPI_MOD_IOX_MK_LN_OBJ\n");
			ret = vpapi_make_line_object(arg);
			break;

		case VPAPI_MOD_IOX_MAP_LN_ID:
			//printk("ioctl: VPAPI_MOD_IOX_MAP_LN_ID\n");
			ret = vpapi_map_line_id(arg);
			break;

		case VPAPI_MOD_IOX_MAP_SLAC_ID:
			//printk("ioctl: VPAPI_MOD_IOX_MAP_SLAC_ID\n");
			ret  = vpapi_map_slac_id(arg);
			break;

		case VPAPI_MOD_IOX_FREE_LN_CTX:
			//printk("ioctl: VPAPI_MOD_IOX_FREE_LN_CTX\n");
			ret = vpapi_free_line_context(arg);
			break;

		case VPAPI_MOD_IOX_INIT_DEV:
			//printk("ioctl: VPAPI_MOD_IOX_INIT_DEV\n");
			ret = vpapi_init_device(arg);
			break;

		case VPAPI_MOD_IOX_CAL_LN:
			//printk("ioctl: VPAPI_MOD_IOX_CAL_LN\n");
			ret = vpapi_cal_line(arg);
			break;

		case VPAPI_MOD_IOX_SET_LN_ST:
			//printk("ioctl: VPAPI_MOD_IOX_SET_LN_ST\n");
			ret = vpapi_set_line_state(arg);
			break;

		case VPAPI_MOD_IOX_SET_OPTION:
			//printk("ioctl: VPAPI_MOD_IOX_SET_OPTION\n");
			ret = vpapi_set_option(arg);
			break;

		case VPAPI_MOD_IOX_GET_EVENT:
			//printk("ioctl: VPAPI_MOD_IOX_GET_EVENT\n");
			ret = vpapi_get_event(arg);
			break;

#if defined(CONFIG_ZARLINK_SLIC_VE792)		
		case VPAPI_MOD_IOX_BATT_ON:
			//printk("ioctl: VPAPI_MOD_IOX_BATT_ON\n");
			ret = vpapi_batt_on(arg);
			break;

		case VPAPI_MOD_IOX_BATT_OFF:
			//printk("ioctl: VPAPI_MOD_IOX_BATT_OFF\n");
			ret = vpapi_batt_off(arg);
			break;
#endif
#if defined(CONFIG_ZARLINK_SLIC_VE880)
		case VPAPI_MOD_IOX_REG_READ:
			ret = vpapi_reg_read(arg);
			break;

		case VPAPI_MOD_IOX_REG_WRITE:
			ret = vpapi_reg_write(arg);
			break;
#endif
		default:
			printk("%s: error, ioctl command(0x%x) not supported !!!\n", __func__, cmd);
			ret = -EFAULT;
			break;
	}

#if defined(SLIC_TIMER_EVENT_SUPPORT)
	/* Enable timer routine processing */
	atomic_set(&vpapi_in_ioctl, 0);
#endif

	return ret;
}

static int vpapi_make_dev_object(unsigned long arg)
{
	VpApiModMkDevObjType data;
	VpDeviceType deviceType;
	VpDeviceIdType deviceId;

	/* Get user data */
	if(copy_from_user(&data, (void*)arg, sizeof(VpApiModMkDevObjType))) {
			printk("%s: copy_from_user failed\n", __func__);
			return -EFAULT;
	}

	deviceType = data.deviceType;
	deviceId = data.deviceId;
	
	data.status = VpMakeDeviceObject(deviceType, deviceId, &pDevCtx[deviceId], &pDevObj[deviceId]);

	/* Copy status back to user */
	if(copy_to_user((void*)arg, &data, sizeof(VpApiModMkDevObjType))) {
		printk("%s: copy_to_user failed\n", __func__);
		return  -EFAULT;
	}

	return 0;
}

static int vpapi_make_line_object(unsigned long arg)
{
	VpApiModMkLnObjType data;
	VpTermType termType;
	VpLineIdType lineId;
	VpDeviceIdType deviceId;

	/* Get user data */
	if(copy_from_user(&data, (void*)arg, sizeof(VpApiModMkLnObjType))) {
			printk("%s: copy_from_user failed\n", __func__);
			return -EFAULT;
	}

	termType = data.termType;
	lineId = GET_LINE(data.lineId);
	deviceId = GET_DEVICE(data.lineId);

	data.status = VpMakeLineObject(termType, lineId, &pLineCtx[deviceId][lineId],
                        	&pLineObj[deviceId][lineId], &pDevCtx[deviceId]);

	/* Copy status back to user */
	if(copy_to_user((void*)arg, &data, sizeof(VpApiModMkLnObjType))) {
		printk("%s: copy_to_user failed\n", __func__);
		return  -EFAULT;
	}

	
	return 0;
}

static int vpapi_map_line_id(unsigned long arg)
{
	VpApiModMapLnIdType data;
	VpLineIdType lineId;
	VpDeviceIdType deviceId;

	/* Get user data */
	if(copy_from_user(&data, (void*)arg, sizeof(VpApiModMapLnIdType))) {
			printk("%s: copy_from_user failed\n", __func__);
			return -EFAULT;
	}

	lineId = GET_LINE(data.lineId);
	deviceId = GET_DEVICE(data.lineId);

	data.status = VpMapLineId(&pLineCtx[deviceId][lineId], data.lineId);

	/* Copy status back to user */
	if(copy_to_user((void*)arg, &data, sizeof(VpApiModMapLnIdType))) {
		printk("%s: copy_to_user failed\n", __func__);
		return  -EFAULT;
	}

	return 0;
}

static int vpapi_map_slac_id(unsigned long arg)
{
	VpApiModMapSlacIdType data;
	VpDeviceIdType deviceId;
	u8 slacId;

	/* Get user data */
	if(copy_from_user(&data, (void*)arg, sizeof(VpApiModMapSlacIdType))) {
			printk("%s: copy_from_user failed\n", __func__);
			return -EFAULT;
	}
	
	deviceId = data.deviceId;
	slacId = data.slacId;
#if defined(CONFIG_ZARLINK_SLIC_VE792)
	data.status = VpMapSlacId(&pDevCtx[deviceId], slacId);
#endif
	/* Copy status back to user */
	if(copy_to_user((void*)arg, &data, sizeof(VpApiModMapSlacIdType))) {
		printk("%s: copy_to_user failed\n", __func__);
		return  -EFAULT;
	}

	return 0;
	
}

static int vpapi_free_line_context(unsigned long arg)
{
	VpApiModFreeLnCtxType data;
	VpLineIdType lineId;
	VpDeviceIdType deviceId;

	/* Get user data */
	if(copy_from_user(&data, (void*)arg, sizeof(VpApiModFreeLnCtxType))) {
			printk("%s: copy_from_user failed\n", __func__);
			return -EFAULT;
	}

	lineId = GET_LINE(data.lineId);
	deviceId = GET_DEVICE(data.lineId);

	data.status = VpFreeLineCtx(&pLineCtx[deviceId][lineId]);

	if(data.status == VP_STATUS_SUCCESS) {
		vpapi_line_status[data.lineId] = 0;
		total_lines--;
#if defined(SLIC_TIMER_EVENT_SUPPORT)
		if(total_lines == 0) {
			atomic_set(&vpapi_init, 0);
			del_timer(&vpapi_timer);
		}
#endif
	}

	/* Copy status back to user */
	if(copy_to_user((void*)arg, &data, sizeof(VpApiModFreeLnCtxType))) {
		printk("%s: copy_to_user failed\n", __func__);
		return  -EFAULT;
	}

	return 0;
}

static int vpapi_init_device(unsigned long arg)
{
	VpApiModInitDeviceType data;
	VpDeviceIdType deviceId;
	VpProfileDataType devProfile[MAX_PROFILE_SIZE];
	VpProfileDataType acProfile[MAX_PROFILE_SIZE];
	VpProfileDataType dcProfile[MAX_PROFILE_SIZE];
	VpProfileDataType ringProfile[MAX_PROFILE_SIZE];
	VpProfileDataType fxoAcProfile[MAX_PROFILE_SIZE];
	VpProfileDataType fxoCfgProfile[MAX_PROFILE_SIZE];
	VpProfilePtrType pDevProfile = NULL, pAcProfile = NULL;
	VpProfilePtrType pDcProfile = NULL, pRingProfile = NULL;
	VpProfilePtrType pFxoAcProfile = NULL, pFxoCfgProfile = NULL;
	u16 devProfileSize, acProfileSize, dcProfileSize;
	u16 ringProfileSize, fxoAcProfileSize, fxoCfgProfileSize;

	/* Get user data */
	if(copy_from_user(&data, (void*)arg, sizeof(VpApiModInitDeviceType))) {
			printk("%s: copy_from_user failed\n", __func__);
			return -EFAULT;
	}

	deviceId = data.deviceId;
	devProfileSize = data.devProfileSize;
	acProfileSize = data.acProfileSize;
	dcProfileSize = data.dcProfileSize;
	ringProfileSize = data.ringProfileSize;
	fxoAcProfileSize = data.fxoAcProfileSize;
	fxoCfgProfileSize = data.fxoCfgProfileSize;

	if(devProfileSize) {
		/* Get device profile */
		if(copy_from_user(devProfile, (void*)data.pDevProfile, (sizeof(VpProfileDataType)*devProfileSize))) {
			printk("%s: copy_from_user failed\n", __func__);
			return -EFAULT;
		}
		pDevProfile = devProfile;
	}

	if(acProfileSize) {
		/* Get AC profile */
		if(copy_from_user(acProfile, (void*)data.pAcProfile, (sizeof(VpProfileDataType)*acProfileSize))) {
			printk("%s: copy_from_user failed\n", __func__);
			return -EFAULT;
		}
		pAcProfile = acProfile;
	}

	if(dcProfileSize) {
		/* Get DC profile */
		if(copy_from_user(dcProfile, (void*)data.pDcProfile, (sizeof(VpProfileDataType)*dcProfileSize))) {
			printk("%s: copy_from_user failed\n", __func__);
			return -EFAULT;
		}
		pDcProfile = dcProfile;
	}

	if(ringProfileSize) {
		/* Get ring profile */
		if(copy_from_user(ringProfile, (void*)data.pRingProfile, (sizeof(VpProfileDataType)*ringProfileSize))) {
			printk("%s: copy_from_user failed\n", __func__);
			return -EFAULT;
		}
		pRingProfile = ringProfile;
	}

	if(fxoAcProfileSize) {
		/* Get FXO AC profile */
		if(copy_from_user(fxoAcProfile, (void*)data.pFxoAcProfile, (sizeof(VpProfileDataType)*fxoAcProfileSize))) {
			printk("%s: copy_from_user failed\n", __func__);
			return -EFAULT;
		}
		pFxoAcProfile = fxoAcProfile;
	}

	if(fxoCfgProfileSize) {
		/* Get FXO configuration profile */
		if(copy_from_user(fxoCfgProfile, (void*)data.pFxoCfgProfile,
					 (sizeof(VpProfileDataType)*fxoCfgProfileSize))) {
			printk("%s: copy_from_user failed\n", __func__);
			return -EFAULT;
		}
		pFxoCfgProfile = fxoCfgProfile;
	}

	data.status = VpInitDevice(&pDevCtx[deviceId], pDevProfile, pAcProfile, pDcProfile, pRingProfile,
					 pFxoAcProfile, pFxoCfgProfile);

	if(data.status == VP_STATUS_SUCCESS) {
		total_devs++;
		REGISTER_DEVICE(deviceId);

		if(!atomic_read(&vpapi_init)) {
#if defined(SLIC_TIMER_EVENT_SUPPORT)
			memset(&vpapi_timer, 0, sizeof(struct timer_list));
			init_timer(&vpapi_timer);
    			vpapi_timer.function = vpapi_tick_handler;
    			vpapi_timer.data = -1;
			vpapi_timer.expires = jiffies + VPAPI_TICK_TIMER_PERIOD;
			add_timer(&vpapi_timer);
#endif
			atomic_set(&vpapi_init, 1);
		}
	}

	/* Copy status back to user */
	if(copy_to_user((void*)arg, &data, sizeof(VpApiModInitDeviceType))) {
		printk("%s: copy_to_user failed\n", __func__);
		return  -EFAULT;
	}

	return 0;
}

static int vpapi_cal_line(unsigned long arg)
{
	VpApiModCalLnType data;
	VpLineIdType lineId;
	VpDeviceIdType deviceId;

	/* Get user data */
	if(copy_from_user(&data, (void*)arg, sizeof(VpApiModCalLnType))) {
			printk("%s: copy_from_user failed\n", __func__);
			return -EFAULT;
	}

	lineId = GET_LINE(data.lineId);
	deviceId = GET_DEVICE(data.lineId);

	data.status = VpCalLine(&pLineCtx[deviceId][lineId]);

	if(data.status == VP_STATUS_SUCCESS) {
		total_lines++;
		REGISTER_LINE(data.lineId);
	}

	/* Copy status back to user */
	if(copy_to_user((void*)arg, &data, sizeof(VpApiModCalLnType))) {
		printk("%s: copy_to_user failed\n", __func__);
		return  -EFAULT;
	}

	return 0;
}

static int vpapi_set_line_state(unsigned long arg)
{
	VpApiModSetLnStType data;
	VpLineIdType lineId;
	VpDeviceIdType deviceId;
	VpLineStateType state;

	/* Get user data */
	if(copy_from_user(&data, (void*)arg, sizeof(VpApiModSetLnStType))) {
			printk("%s: copy_from_user failed\n", __func__);
			return -EFAULT;
	}

	lineId = GET_LINE(data.lineId);
	deviceId = GET_DEVICE(data.lineId);
	state = data.state;

	data.status = VpSetLineState(&pLineCtx[deviceId][lineId], state);

	/* Copy status back to user */
	if(copy_to_user((void*)arg, &data, sizeof(VpApiModSetLnStType))) {
		printk("%s: copy_to_user failed\n", __func__);
		return  -EFAULT;
	}

	return 0;
}

static int vpapi_set_option(unsigned long arg)
{
	VpApiModSetOptionType data;
	u8 lineRequest;
	VpLineIdType lineId;
	VpDeviceIdType deviceId;
	VpOptionIdType option;
	void *pOptInfo;
	long size;

	/* Get user data */
	if(copy_from_user(&data, (void*)arg, sizeof(VpApiModSetOptionType))) {
			printk("%s: copy_from_user failed\n", __func__);
			return -EFAULT;
	}

	option = data.option;
	lineRequest = data.lineRequest;
	deviceId = data.deviceId;
	lineId = GET_LINE(data.lineId);

	switch(option) {
		case VP_OPTION_ID_TIMESLOT:
			size = sizeof(VpOptionTimeslotType);
			pOptInfo = (VpOptionTimeslotType*)kmalloc(size, GFP_KERNEL);
			break;
		case VP_OPTION_ID_CODEC:
			size = sizeof(VpOptionCodecType);
			pOptInfo = (VpOptionCodecType*)kmalloc(size, GFP_KERNEL);
			break;
		case VP_OPTION_ID_LOOPBACK:
			size = sizeof(VpOptionLoopbackType);
			pOptInfo = (VpOptionLoopbackType*)kmalloc(size, GFP_KERNEL);
			break;
		case VP_OPTION_ID_EVENT_MASK:
			size = sizeof(VpOptionEventMaskType);
			pOptInfo = (VpOptionEventMaskType*)kmalloc(size, GFP_KERNEL);
			break;
		case VP_OPTION_ID_LINE_STATE:
			size = sizeof(VpOptionLineStateType);
			pOptInfo = (VpOptionLineStateType*)kmalloc(size, GFP_KERNEL);
			break;
		default:
			printk("%s: option(%d) not supported\n",__func__, option);
			return -EFAULT;
	}

	/* Get option info */
	if(copy_from_user(pOptInfo, (void*)data.pValue, size)) {
			printk("%s: copy_from_user failed\n", __func__);
			kfree(pOptInfo);
			return -EFAULT;
	}

	/* Set option to line/device */
	if(lineRequest)
		data.status = VpSetOption(&pLineCtx[deviceId][lineId], VP_NULL, option, pOptInfo);
	else
		data.status = VpSetOption(VP_NULL, &pDevCtx[deviceId], option, pOptInfo);


	kfree(pOptInfo);

	/* Copy status back to user */
	if(copy_to_user((void*)arg, &data, sizeof(VpApiModSetOptionType))) {
		printk("%s: copy_to_user failed\n", __func__);
		return  -EFAULT;
	}

	return 0;
}

int vpapi_get_event(unsigned long arg)
{
	VpApiModGetEventType data;
	VpDeviceIdType deviceId;

	/* Get user data */
	if(copy_from_user(&data, (void*)arg, sizeof(VpApiModGetEventType))) {
			printk("%s: copy_from_user failed\n", __func__);
			return -EFAULT;
	}

	deviceId = data.deviceId;

	if(atomic_read(&event_count) == 0) {
		data.newEvent = FALSE;
	}
	else {
		/* Copy event info back to user */
		if(copy_to_user(data.pEvent, &event_queue[curr_event].vp_event, sizeof(VpEventType))) {
			printk("%s: copy_to_user failed\n", __func__);
			return  -EFAULT;
		}

		event_queue[curr_event].valid = 0;
		data.newEvent = TRUE;
		atomic_dec(&event_count);
		curr_event++;
		if(curr_event == MAX_EVENT_QUEUE_SIZE)
			curr_event = 0;
	}

	/* Copy status and event info back to user */
	if(copy_to_user((void*)arg, &data, sizeof(VpApiModGetEventType))) {
		printk("%s: copy_to_user failed\n", __func__);
		return  -EFAULT;
	}

	return 0;
}
#if defined(CONFIG_ZARLINK_SLIC_VE792)
static int vpapi_batt_on(unsigned long arg)
{
	VpModBatteryOnType data;
	int vbh, vbl, vbp;

	/* Get user data */
	if(copy_from_user(&data, (void*)arg, sizeof(VpModBatteryOnType))) {
			printk("%s: copy_from_user failed\n", __func__);
			return -EFAULT;
	}
	
	vbh = data.vbh;
	vbl = data.vbl;
	vbp = data.vbp;

	data.status = BattOn(vbh, vbl, vbp);

	/* Copy status and event info back to user */
	if(copy_to_user((void*)arg, &data, sizeof(VpModBatteryOnType))) {
		printk("%s: copy_to_user failed\n", __func__);
		return  -EFAULT;
	}

	return 0;
}

static int vpapi_batt_off(unsigned long arg)
{
	VpModBatteryOffType data;

	/* Get user data */
	if(copy_from_user(&data, (void*)arg, sizeof(VpModBatteryOffType))) {
			printk("%s: copy_from_user failed\n", __func__);
			return -EFAULT;
	}
	
	data.status = BattOff();

	/* Copy status and event info back to user */
	if(copy_to_user((void*)arg, &data, sizeof(VpModBatteryOffType))) {
		printk("%s: copy_to_user failed\n", __func__);
		return  -EFAULT;
	}

	return 0;
}
#endif

#if defined(CONFIG_ZARLINK_SLIC_VE880)
static int vpapi_reg_read(unsigned long arg)
{
	VpModRegOpType data;
	VpLineIdType	line_id;
	unsigned char	cmd;
	unsigned short  cmd_len;
	unsigned char *buff_p = NULL;
	unsigned char ec_val[] = {0x1, 0x2};

	/* Get user data */
	if(copy_from_user(&data, (void*)arg, sizeof(VpModRegOpType))) {
			printk("%s: copy_from_user failed\n", __func__);
			return -EFAULT;
	}

	line_id = data.lineId;
	cmd = data.cmd;
	cmd_len = data.cmdLen;
	buff_p = data.buff;

	VpMpiCmd(GET_DEVICE(line_id), ec_val[GET_LINE(line_id)], (cmd | 1), cmd_len, buff_p);

	/* Copy status and event info back to user */
	if(copy_to_user((void*)arg, &data, sizeof(VpModRegOpType))) {
		printk("%s: copy_to_user failed\n", __func__);
		return  -EFAULT;
	}

	return 0;
}

static int vpapi_reg_write(unsigned long arg)
{
	VpModRegOpType data;
	VpLineIdType	line_id;
	unsigned char	cmd;
	unsigned short  cmd_len;
	unsigned char *buff_p = NULL;
	unsigned char ec_val[] = {0x1, 0x2};

	/* Get user data */
	if(copy_from_user(&data, (void*)arg, sizeof(VpModRegOpType))) {
			printk("%s: copy_from_user failed\n", __func__);
			return -EFAULT;
	}

	line_id = data.lineId;
	cmd = data.cmd;
	cmd_len = data.cmdLen;
	buff_p = data.buff;

	VpMpiCmd(GET_DEVICE(line_id), ec_val[GET_LINE(line_id)], cmd, cmd_len, buff_p);

	return 0;
}
#endif

static int vpapi_open(struct inode *pInode, struct file *pFile)
{
	try_module_get(THIS_MODULE);
	return 0;
}

static int vpapi_release(struct inode *pInode, struct file *pFile)
{
	module_put(THIS_MODULE);
	return 0;
}

#if defined(SLIC_TIMER_EVENT_SUPPORT)
static void vpapi_tick_handler(unsigned long data)
{
	u8 deviceId;
	unsigned long flags;
	vpapi_event *pEvent;
#if !defined(CONFIG_ZARLINK_SLIC_VE792)
	bool eventStatus;
#endif

	/* Check if events are already active and not processing IOCTL */
	if((atomic_read(&vpapi_init) == 0) || (atomic_read(&vpapi_in_ioctl) == 1))
		goto timer_exit;

	spin_lock_irqsave(&vpapi_lock, flags);

	for(deviceId = 0; deviceId < MAX_DEVICES; deviceId++) {

		if(GET_DEV_STATUS(deviceId) == 0)
			continue;

		/* Check for free resources */
		if(atomic_read(&event_count) >= MAX_EVENT_QUEUE_SIZE)
			goto timer_exit;

#if !defined(CONFIG_ZARLINK_SLIC_VE792)
		if(VP_STATUS_SUCCESS == VpApiTick(&pDevCtx[deviceId], &eventStatus)) {
			if(eventStatus == TRUE) {
#endif
				pEvent = &event_queue[next_event];
				while(VpGetEvent(&pDevCtx[deviceId], &pEvent->vp_event) == TRUE) {
					if(pEvent->vp_event.status != VP_STATUS_SUCCESS) {
						printk("%s: bad status(%d)\n", __func__, pEvent->vp_event.status);
						break;
					}
					
					if(pEvent->vp_event.eventId == 0)  {
						printk("%s: warning, empty event\n", __func__);
						break;
					}
					
					next_event++;
					if(next_event == MAX_EVENT_QUEUE_SIZE) {
						next_event = 0;
					}

					atomic_inc(&event_count);
					
					if(pEvent->valid == 0) {
						pEvent->valid = 1;			
					}
					else {
						printk("%s: error, event(%u) was overrided\n", __func__, next_event);
						break;
					}

					pEvent = &event_queue[next_event];
				}
#if !defined(CONFIG_ZARLINK_SLIC_VE792)
			}
		}
#endif
	}

	
	spin_unlock_irqrestore(&vpapi_lock, flags);

timer_exit:

	/* Checks if user application should be signaled */
	if(atomic_read(&event_count) > 0) {
		wake_up_interruptible(&vpapi_wait);
	}

	/* Schedule next timer tick */
	vpapi_timer.expires = jiffies + VPAPI_TICK_TIMER_PERIOD;
    	add_timer(&vpapi_timer);
}
#endif

int __init vpapi_module_init(void)
{
	int status;

	printk("Loading Marvell %s device\n", VPAPI_MOD_NAME);
	status = misc_register(&vpapi_misc_dev);

	/* Register VPAPI device module */
	if (status < 0) {
		printk("Error, failed to load %s module(%d)\n", VPAPI_MOD_NAME, status);
		return status;
	}

	atomic_set(&vpapi_init, 0);
	atomic_set(&vpapi_in_ioctl, 0);
	total_devs = 0;
	total_lines = 0;
	next_event = 0;
	curr_event = 0;
	memset(vpapi_dev_status, 0, MAX_DEVICES);
	memset(vpapi_line_status, 0, MAX_LINES);

	/* Reset event counter */
	atomic_set(&event_count, 0);

	/* Clear event queue */
	memset(event_queue, 0, (MAX_EVENT_QUEUE_SIZE * sizeof(vpapi_event)));

	return 0;
}

void __exit vpapi_module_exit(void)
{
	printk("Unloading %s device module\n", VPAPI_MOD_NAME);

#if defined(SLIC_TIMER_EVENT_SUPPORT)
	if(total_lines == 0)
		del_timer(&vpapi_timer);
#endif

	/* Unregister VPAPI misc device */
	misc_deregister(&vpapi_misc_dev);

	return;
}

/* Module stuff */
module_init(vpapi_module_init);
module_exit(vpapi_module_exit);
MODULE_DESCRIPTION("Zarlink VPAPI-II Device");
MODULE_AUTHOR("Eran Ben-Avi <benavi@marvell.com>");
MODULE_LICENSE("GPL");