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#include "mvSysHwConfig.h"
#include "mvSysTdmConfig.h"
#include "tdm_dev.h"
#include "mv_phone/tdm/tdm_if.h"
#include "mv_phone/tdm/tal.h"
#include <linux/module.h>
#include <linux/init.h>
#include <linux/poll.h>
#include <linux/miscdevice.h>
#ifdef CONFIG_MV_TDM_SUPPORT
 #include "voiceband/tdm/mvTdm.h"
#else
 #include "voiceband/commUnit/mvCommUnit.h"
#endif

#define TDM_DEV_NAME 	"tdm"
#define DISABLE		0
#define ENABLE		1
#define MAX_POLL	12 /* millisecond */

#ifdef CONFIG_MV_PHONE_USE_FIQ_PROCESSING
extern unsigned int mvCtrlTdmUnitIrqGet(void);
extern void mv_mask_fiq(unsigned int irq);
extern void mv_unmask_fiq(unsigned int irq);
#endif /* CONFIG_MV_PHONE_USE_FIQ_PROCESSING */

/* Globals */
static DECLARE_WAIT_QUEUE_HEAD(tdm_dev_wait);
static DEFINE_SPINLOCK(tdm_dev_lock);
static tal_params_t tdm_dev_params;
static tal_mmp_ops_t tdm_dev_ops;
static atomic_t tdm_init, rx_ready, tx_ready;
static unsigned char *rx_buff_p = NULL, *tx_buff_p = NULL;
static unsigned char rx_temp_buff[MV_TDM_TOTAL_CHANNELS * MV_TDM_TOTAL_CH_SAMPLES * 4];
#if defined(MV_TDM_USE_DCO)
static tdm_dev_clk_t tdm_dev_clk;
#endif

/* Forward declarations */
static int tdm_dev_tdm_start(unsigned long arg);
static ssize_t tdm_dev_read(struct file *file_p, char __user *buf, size_t size, loff_t * ppos);
static ssize_t tdm_dev_write(struct file *file_p, const char __user *buf, size_t size, loff_t * ppos);
static unsigned int tdm_dev_poll(struct file *file_p, poll_table *poll_table_p);
static int tdm_dev_ioctl(struct inode *inode_p, struct file *file_p, unsigned int cmd, unsigned long arg);
static int tdm_dev_open(struct inode *inode_p, struct file *file_p);
static int tdm_dev_release(struct inode *inode_p, struct file *file_p);
void tdm_dev_tx_callback(unsigned char* tx_buff, int size);
void tdm_dev_rx_callback(unsigned char* rx_buff, int size);
static int __init tdm_dev_init(void);
static void __exit tdm_dev_exit(void);

static struct file_operations tdm_dev_fops = {
    owner:      THIS_MODULE,
    llseek:     NULL,
    read:       tdm_dev_read,
    write:      tdm_dev_write,
    poll:       tdm_dev_poll,
    ioctl:      tdm_dev_ioctl,
    open:       tdm_dev_open,
    release:    tdm_dev_release,
    fasync:     NULL
};

static struct miscdevice tdm_dev_misc_dev = {
	.minor = TDMDEV_MINOR,
	.name = TDM_DEV_NAME,
	.fops = &tdm_dev_fops,
};


static int __init tdm_dev_init(void)
{
	int status;

	printk("Loading Marvell tdm device\n");
	status = misc_register(&tdm_dev_misc_dev);

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

	atomic_set(&tdm_init, DISABLE);

	return 0;
}

static int tdm_dev_tdm_start(unsigned long arg)
{
	tdm_dev_params_t data;
	int i;

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

	/* Check parameters */
	if((data.pcm_format != 1) && (data.pcm_format != 2) && (data.pcm_format != 4)) {
		printk("%s: bad parameter(pcm_format=%u)\n", __FUNCTION__, data.pcm_format);
		return -EFAULT;
	}

	if(data.total_lines > MV_TDM_TOTAL_CHANNELS) {
		printk("%s: bad parameter(data.total_lines=%u)\n", __FUNCTION__, data.total_lines);
		return -EFAULT;
	}

	tdm_dev_params.pcm_format = (tal_pcm_format_t)data.pcm_format;
	/* Fill time slot table */
	for(i = 0; i < data.total_lines; i++)
		tdm_dev_params.pcm_slot[i] = ((i+1) * data.pcm_format); /* skip time slot #0 */

	tdm_dev_params.sampling_period = MV_TDM_BASE_SAMPLING_PERIOD;
	tdm_dev_params.total_lines = data.total_lines;
	tdm_dev_params.test_enable = 1;

	/* Assign Rx/Tx callbacks */
	tdm_dev_ops.tal_mmp_rx_callback = tdm_dev_rx_callback;
	tdm_dev_ops.tal_mmp_tx_callback = tdm_dev_tx_callback;

	if(tal_init(&tdm_dev_params, &tdm_dev_ops) != MV_OK) {
		printk("%s: Error, could not init tdm driver\n",__FUNCTION__);
		return -EFAULT;
	}

	/* Prepare globals */
	atomic_set(&tdm_init, ENABLE);
	atomic_set(&rx_ready, DISABLE);
	atomic_set(&tx_ready, DISABLE);
	rx_buff_p = NULL;
	tx_buff_p = NULL;

	return 0;
}

static ssize_t tdm_dev_read(struct file *file_p, char __user *buf, size_t size, loff_t * ppos)
{
	size_t ret = size;

	TRC_REC("->%s\n",__FUNCTION__);

#ifdef CONFIG_MV_PHONE_USE_FIQ_PROCESSING
	mv_mask_fiq(mvCtrlTdmUnitIrqGet());
#endif /* CONFIG_MV_PHONE_USE_FIQ_PROCESSING */
	if(rx_buff_p != NULL) {
		if (copy_to_user(buf, rx_buff_p, size))
			ret = -EFAULT;
		rx_buff_p = NULL;
		atomic_set(&rx_ready, DISABLE);
	} else {
		ret = 0;
		TRC_REC("%s: missed Rx buffer\n",__FUNCTION__);
	}

	TRC_REC("<-%s\n",__FUNCTION__);

#ifdef CONFIG_MV_PHONE_USE_FIQ_PROCESSING
	mv_unmask_fiq(mvCtrlTdmUnitIrqGet());
#endif /* CONFIG_MV_PHONE_USE_FIQ_PROCESSING */
	return ret;
}

static ssize_t tdm_dev_write(struct file *file_p, const char __user *buf, size_t size, loff_t * ppos)
{
	unsigned long flags = 0;
	MV_STATUS status;
	size_t ret = size;

	TRC_REC("->%s\n",__FUNCTION__);

#ifdef CONFIG_MV_PHONE_USE_FIQ_PROCESSING
	mv_mask_fiq(mvCtrlTdmUnitIrqGet());
#endif /* CONFIG_MV_PHONE_USE_FIQ_PROCESSING */
	if(tx_buff_p != NULL) {
		if (copy_from_user(tx_buff_p, buf, size))
			ret = -EFAULT;
		atomic_set(&tx_ready, DISABLE);
		spin_lock_irqsave(&tdm_dev_lock, flags);
#ifdef CONFIG_MV_TDM_SUPPORT
		status = mvTdmTx(tx_buff_p);
#else
		status = mvCommUnitTx(tx_buff_p);
#endif
		spin_unlock_irqrestore(&tdm_dev_lock, flags);
		tx_buff_p = NULL;
		if(status != MV_OK)
			printk("%s: could not fill Tx buffer\n",__FUNCTION__);
	} else {
		ret = 0;
		TRC_REC("%s: missed Tx buffer\n",__FUNCTION__);
	}
	TRC_REC("<-%s\n",__FUNCTION__);

#ifdef CONFIG_MV_PHONE_USE_FIQ_PROCESSING
	mv_unmask_fiq(mvCtrlTdmUnitIrqGet());
#endif /* CONFIG_MV_PHONE_USE_FIQ_PROCESSING */
	return ret;
}

static unsigned int tdm_dev_poll(struct file *file_p, poll_table *poll_table_p)
{
	int mask = 0, max_poll = 0;

#ifdef CONFIG_MV_PHONE_USE_FIQ_PROCESSING
	while (!atomic_read(&rx_ready) && !atomic_read(&tx_ready) && (max_poll < MAX_POLL)) {
		mdelay(1);
		max_poll++;
	}

	if (max_poll >= MAX_POLL)
		printk("%s: Warning, no Rx/Tx callback for at least 10ms\n",__FUNCTION__);

	if (atomic_read(&rx_ready)) {
		atomic_set(&rx_ready, DISABLE);
		mask |= POLLIN | POLLRDNORM;	/* readable */
		TRC_REC("poll can read\n");
	}

	if (atomic_read(&tx_ready)) {
		atomic_set(&tx_ready, DISABLE);
		mask |= POLLOUT | POLLWRNORM;	/* writable */
		TRC_REC("poll can write\n");
	}
#else /* CONFIG_MV_PHONE_USE_FIQ_PROCESSING */
	TRC_REC("->%s\n",__FUNCTION__);

	poll_wait(file_p, &tdm_dev_wait, poll_table_p);

	if(atomic_read(&rx_ready)) {
		mask |= POLLIN | POLLRDNORM;	/* readable */
		TRC_REC("poll can read\n");
	}

	if(atomic_read(&tx_ready)) {
		mask |= POLLOUT | POLLWRNORM;	/* writable */
		TRC_REC("poll can write\n");
	}

	TRC_REC("<-%s\n",__FUNCTION__);
#endif /* CONFIG_MV_PHONE_USE_FIQ_PROCESSING */

	return mask;
}

static int tdm_dev_ioctl(struct inode *inode_p, struct file *file_p, unsigned int cmd, unsigned long arg)
{
	int ret = 0;

	/* Argument checking */
	if (_IOC_TYPE(cmd) != TDM_DEV_IOCTL_MAGIC) {
		printk("%s: invalid TDM DEV Magic Num %i %i\n", __FUNCTION__, _IOC_TYPE(cmd), TDM_DEV_IOCTL_MAGIC);
		return -ENOTTY;
	}

	if ((_IOC_NR(cmd) > TDM_DEV_IOCTL_MAX) || (_IOC_NR(cmd) < TDM_DEV_IOCTL_MIN)) {
		printk("%s: invalid TDM DEV IOCTL request\n", __FUNCTION__);
		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 TDM DEV access type %i from cmd %i\n", __FUNCTION__, _IOC_DIR(cmd), cmd);
		return -EFAULT;
	}

	switch (cmd) {
		case TDM_DEV_TDM_START:
			printk("ioctl: TDM_DEV_TDM_START\n");
			ret = tdm_dev_tdm_start(arg);
			break;

		case TDM_DEV_TDM_STOP:
			atomic_set(&tdm_init, DISABLE);
			tal_exit();
			printk("ioctl: TDM_DEV_TDM_STOP\n");
			break;

		case TDM_DEV_PCM_START:
			printk("ioctl: TDM_DEV_PCM_START\n");
			atomic_set(&rx_ready, DISABLE);
			atomic_set(&tx_ready, DISABLE);
			rx_buff_p = NULL;
			tx_buff_p = NULL;
			tal_pcm_start();
			break;

		case TDM_DEV_PCM_STOP:
			tal_pcm_stop();
			printk("ioctl: TDM_DEV_PCM_STOP\n");
			break;

#if defined(MV_TDM_USE_DCO)
		case TDM_DEV_TDM_CLK_CONFIG:
			mvCtrlTdmClkCtrlConfig();
			printk("ioctl: TDM_DEV_TDM_CLK_CONFIG\n");
			break;

		case TDM_DEV_TDM_CLK_GET:
			tdm_dev_clk.correction=mvCtrlTdmClkCtrlGet();
			printk("ioctl: TDM_DEV_TDM_CLK_GET: %x\n", tdm_dev_clk.correction);
			/* Put user data */
			if(copy_to_user((void*)arg, &tdm_dev_clk, sizeof(tdm_dev_clk_t))) {
				printk("%s: copy_to_user failed\n", __FUNCTION__);
			return -EFAULT;
			}
			printk("ioctl: TDM_DEV_TDM_CLK_GET\n");
			break;

		case TDM_DEV_TDM_CLK_SET:
			/* Get user data */
			if(copy_from_user(&tdm_dev_clk, (void*)arg, sizeof(tdm_dev_clk_t))) {
				printk("%s: copy_from_user failed\n", __FUNCTION__);
			return -EFAULT;
			}
			printk("ioctl: TDM_DEV_TDM_CLK_SET: %x\n", tdm_dev_clk.correction);
			mvCtrlTdmClkCtrlSet(tdm_dev_clk.correction);
			printk("ioctl: TDM_DEV_TDM_CLK_SET\n");
			break;
#endif
	}

	return ret;
}
static int tdm_dev_open(struct inode *inode_p, struct file *file_p)
{
	try_module_get(THIS_MODULE);
	return 0;
}

static int tdm_dev_release(struct inode *inode_p, struct file *file_p)
{
	module_put(THIS_MODULE);
	return 0;
}

void tdm_dev_tx_callback(unsigned char* tx_buff, int size)
{
	TRC_REC("->%s\n",__FUNCTION__);

	tx_buff_p = tx_buff;
	atomic_set(&tx_ready, ENABLE);
#ifndef CONFIG_MV_PHONE_USE_FIQ_PROCESSING
	wake_up_interruptible(&tdm_dev_wait);
#endif /* CONFIG_MV_PHONE_USE_FIQ_PROCESSING */

	TRC_REC("<-%s\n",__FUNCTION__);
	return;
}

void tdm_dev_rx_callback(unsigned char* rx_buff, int size)
{
	TRC_REC("->%s\n",__FUNCTION__);

	rx_buff_p = rx_temp_buff;
	memcpy(rx_buff_p, rx_buff, size);
	atomic_set(&rx_ready, ENABLE);
#ifndef CONFIG_MV_PHONE_USE_FIQ_PROCESSING
	wake_up_interruptible(&tdm_dev_wait);
#endif /* CONFIG_MV_PHONE_USE_FIQ_PROCESSING */

	TRC_REC("<-%s\n",__FUNCTION__);
	return;
}

static void __exit tdm_dev_exit(void)
{
	printk("Marvell telephony test device exits\n");

	/* Stop TDM channels and release all resources */
	tal_exit();

	/* Unregister tdm misc device */
	misc_deregister(&tdm_dev_misc_dev);
}

/* Module stuff */
module_init(tdm_dev_init);
module_exit(tdm_dev_exit);
MODULE_DESCRIPTION("Marvell Telephony Test Device - www.marvell.com");
MODULE_AUTHOR("Eran Ben-Avi <benavi@marvell.com>");
MODULE_LICENSE("GPL");