#include <ssw.h>
#include <mach/mtk_ccci_helper.h>
/*--------------Feature option---------------*/
#define __ENABLE_SSW_SYSFS 1

/*--------------SIM mode list----------------*/
#define SINGLE_TALK_MDSYS				(0x1)
#define SINGLE_TALK_MDSYS_LITE			(0x2)
#define DUAL_TALK						(0x3)
#define DUAL_TALK_SWAP					(0x4)

/*----------------Error Code-----------------*/
#define SSW_SUCCESS					(0)
#define SSW_INVALID_PARA				(-1)

/*--------------Global varible---------------*/
unsigned int sim_mode_curr = SINGLE_TALK_MDSYS;

unsigned int get_sim_switch_type(void)
{
	SSW_DBG("[ccci/ssw]SSW_GENERIC\n");
	return SSW_INTERN;
}

struct mutex sim_switch_mutex;

static inline void sim_switch_writel(void *addr, unsigned offset, u32 data)
{
	*((volatile unsigned int *)(addr + offset)) = data;
}

static inline u32 sim_switch_readl(const void *addr, unsigned offset)
{
	u32 rc = 0;

	rc = *((volatile unsigned int *)(addr + offset));
	return rc;
}

static int set_sim_gpio(unsigned int mode);
static int get_current_ssw_mode(void);

/*---------------------------------------------------------------------------*/
/*define sysfs entry for configuring debug level and sysrq*/
static ssize_t ssw_attr_show(struct kobject *kobj, struct attribute *attr,
			     char *buffer)
{
	struct ssw_sys_entry *entry =
	    container_of(attr, struct ssw_sys_entry, attr);

	return entry->show(kobj, buffer);
}

static ssize_t ssw_attr_store(struct kobject *kobj, struct attribute *attr,
			      const char *buffer, size_t size)
{
	struct ssw_sys_entry *entry =
	    container_of(attr, struct ssw_sys_entry, attr);

	return entry->store(kobj, buffer, size);
}

static ssize_t ssw_mode_show(struct kobject *kobj, char *buffer)
{
	int remain = PAGE_SIZE;
	int len;
	char *ptr = buffer;

	len = scnprintf(ptr, remain, "0x%x\n", get_current_ssw_mode());
	ptr += len;
	remain -= len;
	SSW_DBG("ssw_mode_show\n");

	return PAGE_SIZE - remain;
}

ssize_t ssw_mode_store(struct kobject *kobj, const char *buffer, size_t size)
{
	unsigned int mode;
	int res = kstrtoint(buffer, 0, &mode);
	unsigned int type;

	if (res != 1) {
		SSW_DBG("%s: expect 1 numbers\n", __func__);
	} else {
		SSW_DBG("ssw_mode_store %x\n", mode);
		/*Switch sim mode */
		if ((sim_mode_curr != mode)
		    && (SSW_SUCCESS == set_sim_gpio(mode))) {
			sim_mode_curr = mode;
		}
	}
	return size;
}

const struct sysfs_ops ssw_sysfs_ops = {
	.show = ssw_attr_show,
	.store = ssw_attr_store,
};

struct ssw_sys_entry {
	struct attribute attr;
	 ssize_t (*show)(struct kobject *kobj, char *page);
	 ssize_t (*store)(struct kobject *kobj, const char *page, size_t size);
};

static struct ssw_sys_entry mode_entry = {
	{.name = "mode", .mode = S_IRUGO | S_IWUSR},	/*remove  .owner = NULL, */
	ssw_mode_show,
	ssw_mode_store,
};

struct attribute *ssw_attributes[] = {
	&mode_entry.attr,
	NULL,
};

struct kobj_type ssw_ktype = {
	.sysfs_ops = &ssw_sysfs_ops,
	.default_attrs = ssw_attributes,
};

static struct ssw_sysobj_t {
	struct kobject kobj;
} ssw_sysobj;

int ssw_sysfs_init(void)
{
	struct ssw_sysobj_t *obj = &ssw_sysobj;

	memset(&obj->kobj, 0x00, sizeof(obj->kobj));

	obj->kobj.parent = kernel_kobj;
	if (kobject_init_and_add(&obj->kobj, &ssw_ktype, NULL, "mtk_ssw")) {
		kobject_put(&obj->kobj);
		return -ENOMEM;
	}
	kobject_uevent(&obj->kobj, KOBJ_ADD);

	return 0;
}
/*---------------------------------------------------------------------------*/

int get_current_ssw_mode(void)
{
	return sim_mode_curr;
}

static int set_sim_gpio(unsigned int mode)
{
	SSW_DBG("set_sim_gpio %d\n", mode);

	switch (mode) {
	case SINGLE_TALK_MDSYS:
#if defined(GPIO_SIM1_SCLK) && defined(GPIO_SIM1_SIO) && defined(GPIO_SIM2_SCLK) && defined(GPIO_SIM2_SIO)
		mt_set_gpio_mode(GPIO_SIM1_SCLK, 1);	/*SIM1_SCLK     */
		mt_set_gpio_mode(GPIO_SIM1_SIO, 1);	/*SIM1_SIO */
		mt_set_gpio_mode(GPIO_SIM2_SCLK, 1);	/*SIM2_SCLK */
		mt_set_gpio_mode(GPIO_SIM2_SIO, 1);	/*SIM2_SIO */
		/*mt_set_gpio_mode(GPIO_SIM1_SRST, 4);  SIM1_SRST, 6582 not use reset pin */
		/*mt_set_gpio_mode(GPIO_SIM2_SRST, 4);  SIM2_SRST, 6582 not use reset pin */
#endif
		break;

	default:
		SSW_DBG("Mode(%d) not supported!!!", mode);
		return SSW_INVALID_PARA;
	}

#if 0
	SSW_DBG
	("Current sim mode(%d), GPIO0_MODE(%d, %d), GPIO1_MODE(%d, %d),
	GPIO2_MODE(%d, %d), GPIO3_MODE(%d, %d),
	GPIO89_MODE(%d, %d), GPIO90_MODE(%d, %d)\n",
	mode, mt_get_gpio_mode(GPIO0), mt_get_gpio_dir(GPIO0),
	mt_get_gpio_mode(GPIO1), mt_get_gpio_dir(GPIO1),
	mt_get_gpio_mode(GPIO2), mt_get_gpio_dir(GPIO2),
	mt_get_gpio_mode(GPIO3), mt_get_gpio_dir(GPIO3),
	mt_get_gpio_mode(GPIO89), mt_get_gpio_dir(GPIO89),
	mt_get_gpio_mode(GPIO90), mt_get_gpio_dir(GPIO90));
#else
#if defined(GPIO_SIM1_SCLK) && defined(GPIO_SIM1_SIO) && defined(GPIO_SIM2_SCLK) && defined(GPIO_SIM2_SIO)
	SSW_DBG
	("Current sim mode(%d), GPIO_SIM1_SCLK_MODE(%d, %d),
	GPIO_SIM1_SIO_MODE(%d, %d), GPIO_SIM2_SCLK_MODE(%d, %d),
	GPIO_SIM2_SIO_MODE(%d, %d)\n",
	mode, mt_get_gpio_mode(GPIO_SIM1_SCLK),
	mt_get_gpio_dir(GPIO_SIM1_SCLK), mt_get_gpio_mode(GPIO_SIM1_SIO),
	mt_get_gpio_dir(GPIO_SIM1_SIO), mt_get_gpio_mode(GPIO_SIM2_SCLK),
	mt_get_gpio_dir(GPIO_SIM2_SCLK), mt_get_gpio_mode(GPIO_SIM2_SIO),
	mt_get_gpio_dir(GPIO_SIM2_SIO));
#endif
#endif

	return SSW_SUCCESS;
}

int switch_sim_mode(int id, char *buf, unsigned int len)
{
	unsigned int mode = *((unsigned int *)buf);

	SSW_DBG("sim switch: %d(%d)\n", mode, sim_mode_curr);

	mutex_lock(&sim_switch_mutex);

	if ((sim_mode_curr != mode) && (SSW_SUCCESS == set_sim_gpio(mode)))
		sim_mode_curr = mode;

	mutex_unlock(&sim_switch_mutex);

	SSW_DBG("sim switch(%d) OK\n", sim_mode_curr);

	return 0;

}

/*To decide sim mode according to compile option*/
static int get_sim_mode_init(void)
{
	unsigned int sim_mode = 0;
	unsigned int md1_enable, md2_enable = 0;

	md1_enable = get_modem_is_enabled(MD_SYS1);
	md2_enable = get_modem_is_enabled(MD_SYS2);

	if (md1_enable) {
		sim_mode = SINGLE_TALK_MDSYS;
		if (md2_enable)
			sim_mode = DUAL_TALK;
	} else if (md2_enable)
		sim_mode = SINGLE_TALK_MDSYS_LITE;

	return sim_mode;
}

/*sim switch hardware initial*/
static int sim_switch_init(void)
{
	SSW_DBG("sim_switch_init\n");

	/*better to set pull_en and pull_sel first, then mode */
	/*if GPIO in sim mode, no need to set direction, because hw has done this when setting mode */
	/*
	   mt_set_gpio_dir(GPIO_SIM1_SCLK, GPIO_DIR_OUT);       /*GPIO0->SIM2_CLK, out */
	mt_set_gpio_dir(GPIO_SIM1_SIO, GPIO_DIR_IN);	/*GPIO1->SIM2_SIO, in */
	mt_set_gpio_dir(GPIO_SIM2_SCLK, GPIO_DIR_OUT);	/*GPIO2->SIM1_CLK, out */
	mt_set_gpio_dir(GPIO_SIM2_SIO, GPIO_DIR_IN);	/*GPIO3->SIM1_SIO, in */
	*/
	    /*mt_set_gpio_dir(GPIO89, GPIO_DIR_OUT);        GPIO89->SIM1_SRST, out, 6572 not use reset pin */
	    /*mt_set_gpio_dir(GPIO90, GPIO_DIR_OUT);        GPIO90->SIM2_SRST, out, 6572 not use reset pin  */
	    sim_mode_curr = get_sim_mode_init();
	if (SSW_SUCCESS != set_sim_gpio(sim_mode_curr)) {
		SSW_DBG("sim_switch_init fail\n");
		return SSW_INVALID_PARA;
	}

	return 0;
}

static int sim_switch_probe(struct platform_device *dev)
{
	SSW_DBG("Enter sim_switch_probe\n");

	/*sim_switch_init(); */

	/*move this to sim_switch_driver_init(). Because this function not exceute on device tree branch.   */
	/*mutex_init(&sim_switch_mutex); */

	/*register_ccci_kern_func(ID_SSW_SWITCH_MODE, switch_sim_mode); */

	return 0;
}

static int sim_switch_remove(struct platform_device *dev)
{
	/*SSW_DBG("sim_switch_remove\n"); */
	return 0;
}

static void sim_switch_shutdown(struct platform_device *dev)
{
	/*SSW_DBG("sim_switch_shutdown\n"); */
}

static int sim_switch_suspend(struct platform_device *dev, pm_message_t state)
{
	/*SSW_DBG("sim_switch_suspend\n"); */
	return 0;
}

static int sim_switch_resume(struct platform_device *dev)
{
	/*SSW_DBG("sim_switch_resume\n"); */
	return 0;
}

static struct platform_driver sim_switch_driver = {
	.driver = {
		   .name = "sim-switch",
		   },
	.probe = sim_switch_probe,
	.remove = sim_switch_remove,
	.shutdown = sim_switch_shutdown,
	.suspend = sim_switch_suspend,
	.resume = sim_switch_resume,
};

static int __init sim_switch_driver_init(void)
{
	int ret = 0;

	SSW_DBG("sim_switch_driver_init\n");
	ret = platform_driver_register(&sim_switch_driver);
	if (ret) {
		SSW_DBG("ssw_driver register fail(%d)\n", ret);
		return ret;
	}

	mutex_init(&sim_switch_mutex);

#if __ENABLE_SSW_SYSFS
	ssw_sysfs_init();
#endif

	sim_switch_init();

	return ret;
}

static void __exit sim_switch_driver_exit(void)
{
}

module_init(sim_switch_driver_init);
module_exit(sim_switch_driver_exit);

MODULE_DESCRIPTION("MTK SIM Switch Driver");
MODULE_AUTHOR("Anny <Anny.Hu@mediatek.com>");
MODULE_LICENSE("GPL");