#include <ssw.h>
#include <mach/mt_ccci_common.h>
#include "cust_gpio_usage.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)

static unsigned int ext_ssw_mode_curr = DUAL_TALK;
static unsigned int sim_mode_curr = SINGLE_TALK_MDSYS;

struct mutex sim_switch_mutex;

static int set_sim_gpio(unsigned int mode);
static int set_ext_sim_gpio(unsigned int mode);

static int get_ext_current_ssw_mode(void);

unsigned int get_sim_switch_type(void)
{
	SSW_DBG("[ccci/ssw]COMBO_FXLA2203_V2\n");
	return SSW_EXT_DUAL_1X2;
}

/*---------------------------------------------------------------------------*/
/*define sysfs entry for configuring debug level and sysrq*/

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);
}

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);
}

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_ext_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 */
		type = (mode & 0xFFFF0000) >> 16;
		mode = mode & 0x0000FFFF;
		if (type == 0) {	/*Internal */
			SSW_DBG("Internal sim switch: %d-->%d\n", sim_mode_curr,
				mode);
			if ((sim_mode_curr != mode)
			    && (SSW_SUCCESS == set_sim_gpio(mode))) {
				sim_mode_curr = mode;
			}
		} else {
			SSW_DBG("External sim switch: %d-->%d\n",
				ext_ssw_mode_curr, mode);
			if (ext_ssw_mode_curr != mode
			    && (SSW_SUCCESS == set_ext_sim_gpio(mode))) {
				ext_ssw_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;
}
/*---------------------------------------------------------------------------*/

/*************************************************************************/
/*external sim switch hardware operation                                                               */
 /**/
/*************************************************************************/
/*Exteranl sim switch hardware initial*/
static int extern_ssw_init(void)
{
	unsigned int mode = DUAL_TALK;
#ifdef CONFIG_MTK_ENABLE_MD1
	mode = SINGLE_TALK_MDSYS;
#ifdef CONFIG_MTK_ENABLE_MD5
	mode = DUAL_TALK;
#endif
#elif defined CONFIG_MTK_ENABLE_MD5
	mode = SINGLE_TALK_MDSYS_LITE;
#endif
	SSW_DBG("extern_ssw_init: %d\n", mode);

	/*initial sim1 select pin: 1, host1->sim slot1; 0, host2->sim slot1 */
	mt_set_gpio_mode(GPIO_EXT_SSW_S1, GPIO_EXT_SSW_S1_M_GPIO);
	mt_set_gpio_dir(GPIO_EXT_SSW_S1, GPIO_DIR_OUT);

	/*initial sim2 select pin: 1, host1->sim slot2; 0, host2->sim slot2 */
	mt_set_gpio_mode(GPIO_EXT_SSW_S2, GPIO_EXT_SSW_S2_M_GPIO);
	mt_set_gpio_dir(GPIO_EXT_SSW_S2, GPIO_DIR_OUT);

	/*initial EN pin: 1, enable sim slot; 0, disable sim slot */
	mt_set_gpio_mode(GPIO_EXT_SSW_EN, GPIO_EXT_SSW_EN_M_GPIO);
	mt_set_gpio_dir(GPIO_EXT_SSW_EN, GPIO_DIR_OUT);

	mt_set_gpio_out(GPIO_EXT_SSW_EN, GPIO_OUT_ONE);	/*SIM_ENABLE */
	SSW_DBG("GPIO_EXT_SSW_EN(%d, %d , %d)\n",
		GPIO_EXT_SSW_EN, mt_get_gpio_mode(GPIO_EXT_SSW_EN),
		mt_get_gpio_out(GPIO_EXT_SSW_EN));

	set_ext_sim_gpio(mode);
	ext_ssw_mode_curr = mode;
	return 0;
}

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

	switch (mode) {
	case SINGLE_TALK_MDSYS:
		set_ext_sim_gpio(SINGLE_TALK_MDSYS);
		break;

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

	return SSW_SUCCESS;
}

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

	switch (mode) {
	case SINGLE_TALK_MDSYS:
		mt_set_gpio_out(GPIO_EXT_SSW_S1, GPIO_OUT_ONE);	/*SIM1_SELECT */
		mt_set_gpio_out(GPIO_EXT_SSW_S2, GPIO_OUT_ONE);	/*SIM2_SELECT */
		break;
	case SINGLE_TALK_MDSYS_LITE:
		mt_set_gpio_out(GPIO_EXT_SSW_S1, GPIO_OUT_ZERO);	/*SIM1_SELECT */
		mt_set_gpio_out(GPIO_EXT_SSW_S2, GPIO_OUT_ZERO);	/*SIM2_SELECT */
		break;
	case DUAL_TALK:
		mt_set_gpio_out(GPIO_EXT_SSW_S1, GPIO_OUT_ONE);	/*SIM1_SELECT */
		mt_set_gpio_out(GPIO_EXT_SSW_S2, GPIO_OUT_ZERO);	/*SIM2_SELECT */
		break;
	case DUAL_TALK_SWAP:
		mt_set_gpio_out(GPIO_EXT_SSW_S1, GPIO_OUT_ZERO);	/*SIM1_SELECT */
		mt_set_gpio_out(GPIO_EXT_SSW_S2, GPIO_OUT_ONE);	/*SIM2_SELECT */
		break;
	default:
		SSW_DBG("Mode(%d) not supported!!!", mode);
		return SSW_INVALID_PARA;
	}
	SSW_DBG
	("Current sim mode(%d), GPIO_EXT_SSW_S1(%d, %d , %d),
		GPIO_EXT_SSW_S2(%d, %d , %d), GPIO_EXT_SSW_EN(%d, %d , %d)\n",
		mode, GPIO_EXT_SSW_S1, mt_get_gpio_mode(GPIO_EXT_SSW_S1),
		mt_get_gpio_out(GPIO_EXT_SSW_S1), GPIO_EXT_SSW_S2,
		mt_get_gpio_mode(GPIO_EXT_SSW_S2),
		mt_get_gpio_out(GPIO_EXT_SSW_S2), GPIO_EXT_SSW_EN,
		mt_get_gpio_mode(GPIO_EXT_SSW_EN),
		mt_get_gpio_out(GPIO_EXT_SSW_EN));

	return SSW_SUCCESS;
}

int get_ext_current_ssw_mode(void)
{
	return ext_ssw_mode_curr;
}

int switch_sim_mode(int id, char *buf, unsigned int len)
{
	unsigned int mode = *((unsigned int *)buf);
	unsigned int type = (mode & 0xFFFF0000) >> 16;

	SSW_DBG("switch_sim_mode:mode=0x%x, type=%d\n", mode, type);
	mode = mode & 0x0000FFFF;

	mutex_lock(&sim_switch_mutex);
	if (type == 0) {	/*Internal */
		SSW_DBG("Internal sim switch: %d --> %d\n", sim_mode_curr,
			mode);
		if ((sim_mode_curr != mode)
		    && (SSW_SUCCESS == set_sim_gpio(mode))) {
			sim_mode_curr = mode;
		}
	} else {		/*External */
		SSW_DBG("External sim switch: %d --> %d\n", ext_ssw_mode_curr,
			mode);
		if (ext_ssw_mode_curr != mode
		    && (SSW_SUCCESS == set_ext_sim_gpio(mode))) {
			ext_ssw_mode_curr = mode;
		}
	}
	mutex_unlock(&sim_switch_mutex);

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

	return 0;

}

/*To decide sim mode according to compile option*/
static int get_sim_mode_init(void)
{
	unsigned int sim_mode = 0;
#if 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;
#endif
	return sim_mode;
}

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

	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;
	}

	extern_ssw_init();

	return 0;
}

static int sim_switch_probe(struct platform_device *dev)
{
	SSW_DBG("Enter sim_switch_probe\n");
	/*move this to sim_switch_driver_init(). Because this function not exceute on device tree branch.   */
	/*mutex_init(&sim_switch_mutex); */
	sim_switch_init();
	/*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("MTK");
MODULE_LICENSE("GPL");