/*
 * Linux cfg80211 driver - Android related functions
 *
 * Copyright (C) 1999-2011, Broadcom Corporation
 *
 *         Unless you and Broadcom execute a separate written software license
 * agreement governing use of this software, this software is licensed to you
 * under the terms of the GNU General Public License version 2 (the "GPL"),
 * available at http://www.broadcom.com/licenses/GPLv2.php, with the
 * following added to such license:
 *
 *      As a special exception, the copyright holders of this software give you
 * permission to link this software with independent modules, and to copy and
 * distribute the resulting executable under terms of your choice, provided that
 * you also meet, for each linked independent module, the terms and conditions of
 * the license of that module.  An independent module is a module which is not
 * derived from this software.  The special exception does not apply to any
 * modifications of the software.
 *
 *      Notwithstanding the above, under no circumstances may you combine this
 * software in any way with any other Broadcom software provided under a license
 * other than the GPL, without Broadcom's express prior written consent.
 *
 * $Id: wl_android.c,v 1.1.4.1.2.14 2011/02/09 01:40:07 Exp $
 */

#include <linux/module.h>
#include <linux/netdevice.h>

#include <wl_android.h>
#include <wldev_common.h>
#include <wlioctl.h>
#include <bcmutils.h>
#include <linux_osl.h>
#include <dhd_dbg.h>
#include <dngl_stats.h>
#include <dhd.h>
#include <bcmsdbus.h>

#if defined(CONFIG_WIFI_CONTROL_FUNC)
#include <linux/platform_device.h>
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 35))
#include <linux/wlan_plat.h>
#else
#include <linux/wifi_tiwlan.h>
#endif
#endif /* CONFIG_WIFI_CONTROL_FUNC */

/*
 * Android private command strings, PLEASE define new private commands here
 * so they can be updated easily in the future (if needed)
 */

#define CMD_START		"START"
#define CMD_STOP		"STOP"
#define	CMD_SCAN_ACTIVE		"SCAN-ACTIVE"
#define	CMD_SCAN_PASSIVE	"SCAN-PASSIVE"
#define CMD_RSSI		"RSSI"
#define CMD_LINKSPEED		"LINKSPEED"
#define CMD_RXFILTER_START	"RXFILTER-START"
#define CMD_RXFILTER_STOP	"RXFILTER-STOP"
#define CMD_BTCOEXSCAN_START	"BTCOEXSCAN-START"
#define CMD_BTCOEXSCAN_STOP	"BTCOEXSCAN-STOP"
#define CMD_BTCOEXMODE		"BTCOEXMODE"
#define CMD_SETSUSPENDOPT	"SETSUSPENDOPT"
#define CMD_SETFWPATH		"SETFWPATH"

typedef struct android_wifi_priv_cmd {
	char *buf;
	int used_len;
	int total_len;
} android_wifi_priv_cmd;

/**
 * Extern function declarations (TODO: move them to dhd_linux.h)
 */
void dhd_customer_gpio_wlan_ctrl(int onoff);
uint dhd_dev_reset(struct net_device *dev, uint8 flag);
void dhd_dev_init_ioctl(struct net_device *dev);
int net_os_set_dtim_skip(struct net_device *dev, int val);
int net_os_set_suspend_disable(struct net_device *dev, int val);
int net_os_set_suspend(struct net_device *dev, int val);

extern bool ap_fw_loaded;
#ifdef CUSTOMER_HW2
extern char iface_name[IFNAMSIZ];
#endif

/**
 * Local (static) functions and variables
 */

/* Initialize g_wifi_on to 1 so dhd_bus_start will be called for the first
 * time (only) in dhd_open, subsequential wifi on will be handled by
 * wl_android_wifi_on
 */
static int g_wifi_on = TRUE;

/**
 * Local (static) function definitions
 */
static int wl_android_get_link_speed(struct net_device *net, char *command, int total_len)
{
	int link_speed;
	int bytes_written;
	int error;

	error = wldev_get_link_speed(net, &link_speed);
	if (error)
		return -1;

	/* Convert Kbps to Android Mbps */
	link_speed = link_speed / 1000;
	bytes_written = snprintf(command, total_len, "LinkSpeed %d", link_speed);
	DHD_INFO(("%s: command result is %s\n", __FUNCTION__, command));
	return bytes_written;
}

static int wl_android_get_rssi(struct net_device *net, char *command, int total_len)
{
	wlc_ssid_t ssid;
	int rssi;
	int bytes_written;
	int error;

	error = wldev_get_rssi(net, &rssi);
	if (error)
		return -1;

	error = wldev_get_ssid(net, &ssid);
	if (error)
		return -1;
	memcpy(command, ssid.SSID, ssid.SSID_len);
	bytes_written = ssid.SSID_len;
	bytes_written += snprintf(&command[bytes_written], total_len, " rssi %d", rssi);
	DHD_INFO(("%s: command result is %s \n", __FUNCTION__, command));
	return bytes_written;
}

static int wl_android_set_suspendopt(struct net_device *dev, char *command, int total_len)
{
	int suspend_flag;
	int ret_now;
	int ret = 0;

	suspend_flag = *(command + strlen(CMD_SETSUSPENDOPT) + 1) - '0';

	if (suspend_flag != 0)
		suspend_flag = 1;
	ret_now = net_os_set_suspend_disable(dev, suspend_flag);

	if (ret_now != suspend_flag) {
		if (!(ret = net_os_set_suspend(dev, ret_now)))
			DHD_INFO(("%s: Suspend Flag %d -> %d\n",
					__FUNCTION__, ret_now, suspend_flag));
		else
			DHD_ERROR(("%s: failed %d\n", __FUNCTION__, ret));
	}
	return ret;
}

/**
 * Global function definitions (declared in wl_android.h)
 */

int wl_android_wifi_on(struct net_device *dev)
{
	int ret = 0;

	printk("%s in\n", __FUNCTION__);
	if (!dev) {
		DHD_ERROR(("%s: dev is null\n", __FUNCTION__));
		return -EINVAL;
	}

	dhd_net_if_lock(dev);
	if (!g_wifi_on) {
		dhd_customer_gpio_wlan_ctrl(WLAN_RESET_ON);
		sdioh_start(NULL, 0);
		ret = dhd_dev_reset(dev, FALSE);
		sdioh_start(NULL, 1);
		dhd_dev_init_ioctl(dev);
		g_wifi_on = 1;
	}
	dhd_net_if_unlock(dev);

	return ret;
}

int wl_android_wifi_off(struct net_device *dev)
{
	int ret = 0;

	printk("%s in\n", __FUNCTION__);
	if (!dev) {
		DHD_TRACE(("%s: dev is null\n", __FUNCTION__));
		return -EINVAL;
	}

	dhd_net_if_lock(dev);
	if (g_wifi_on) {
		dhd_dev_reset(dev, 1);
		dhd_customer_gpio_wlan_ctrl(WLAN_RESET_OFF);
		sdioh_stop(NULL);
		/* clean up dtim_skip setting */
		net_os_set_dtim_skip(dev, TRUE);
		g_wifi_on = 0;
	}
	dhd_net_if_unlock(dev);

	return ret;
}

static int wl_android_set_fwpath(struct net_device *net, char *command, int total_len)
{
	if ((strlen(command) - strlen(CMD_SETFWPATH)) > MOD_PARAM_PATHLEN)
		return -1;
	bcm_strncpy_s(fw_path, sizeof(fw_path),
		command + strlen(CMD_SETFWPATH) + 1, MOD_PARAM_PATHLEN - 1);
	if (strstr(fw_path, "apsta") != NULL) {
		DHD_INFO(("GOT APSTA FIRMWARE\n"));
		ap_fw_loaded = TRUE;
	} else {
		DHD_INFO(("GOT STA FIRMWARE\n"));
		ap_fw_loaded = FALSE;
	}
	return 0;
}

int wl_android_priv_cmd(struct net_device *net, struct ifreq *ifr, int cmd)
{
	int ret = 0;
	char *command = NULL;
	int bytes_written = 0;
	android_wifi_priv_cmd *priv_cmd;

	/* net_os_wake_lock(dev); */

	priv_cmd = (android_wifi_priv_cmd*)ifr->ifr_data;
	if (!priv_cmd)
	{
		ret = -EINVAL;
		goto exit;
	}
	command = kmalloc(priv_cmd->total_len, GFP_KERNEL);
	if (!command)
	{
		DHD_ERROR(("%s: failed to allocate memory\n", __FUNCTION__));
		ret = -ENOMEM;
		goto exit;
	}
	if (copy_from_user(command, priv_cmd->buf, priv_cmd->total_len)) {
		ret = -EFAULT;
		goto exit;
	}

	DHD_INFO(("%s: Android private cmd \"%s\" on %s\n", __FUNCTION__, command, ifr->ifr_name));

	if (strnicmp(command, CMD_START, strlen(CMD_START)) == 0) {
		DHD_INFO(("%s, Received regular START command\n", __FUNCTION__));
		bytes_written = wl_android_wifi_on(net);
	}
	else if (strnicmp(command, CMD_SETFWPATH, strlen(CMD_SETFWPATH)) == 0) {
		bytes_written = wl_android_set_fwpath(net, command, priv_cmd->total_len);
	}

	if (!g_wifi_on) {
		DHD_ERROR(("%s: Ignore private cmd \"%s\" - iface %s is down\n",
				__FUNCTION__, command, ifr->ifr_name));
		ret = 0;
		goto exit;
	}

	if (strnicmp(command, CMD_STOP, strlen(CMD_STOP)) == 0) {
		bytes_written = wl_android_wifi_off(net);
	}
	else if (strnicmp(command, CMD_SCAN_ACTIVE, strlen(CMD_SCAN_ACTIVE)) == 0) {
		/* TBD: SCAN-ACTIVE */
	}
	else if (strnicmp(command, CMD_SCAN_PASSIVE, strlen(CMD_SCAN_PASSIVE)) == 0) {
		/* TBD: SCAN-PASSIVE */
	}
	else if (strnicmp(command, CMD_RSSI, strlen(CMD_RSSI)) == 0) {
		bytes_written = wl_android_get_rssi(net, command, priv_cmd->total_len);
	}
	else if (strnicmp(command, CMD_LINKSPEED, strlen(CMD_LINKSPEED)) == 0) {
		bytes_written = wl_android_get_link_speed(net, command, priv_cmd->total_len);
	}
	else if (strnicmp(command, CMD_RXFILTER_START, strlen(CMD_RXFILTER_START)) == 0) {
		/* TBD: RXFILTER-START */
	}
	else if (strnicmp(command, CMD_RXFILTER_STOP, strlen(CMD_RXFILTER_STOP)) == 0) {
		/* TBD: RXFILTER-STOP */
	}
	else if (strnicmp(command, CMD_BTCOEXSCAN_START, strlen(CMD_BTCOEXSCAN_START)) == 0) {
		/* TBD: BTCOEXSCAN-START */
	}
	else if (strnicmp(command, CMD_BTCOEXSCAN_STOP, strlen(CMD_BTCOEXSCAN_STOP)) == 0) {
		/* TBD: BTCOEXSCAN-STOP */
	}
	else if (strnicmp(command, CMD_BTCOEXMODE, strlen(CMD_BTCOEXMODE)) == 0) {
		/* TBD: BTCOEXMODE */
	}
	else if (strnicmp(command, CMD_SETSUSPENDOPT, strlen(CMD_SETSUSPENDOPT)) == 0) {
		bytes_written = wl_android_set_suspendopt(net, command, priv_cmd->total_len);
	} else {
		DHD_ERROR(("Unknown PRIVATE command %s - ignored\n", command));
		snprintf(command, 3, "OK");
		bytes_written = strlen("OK") + 1;
	}

	if (bytes_written > 0) {
		priv_cmd->used_len = bytes_written;
		if (copy_to_user(priv_cmd->buf, command, bytes_written)) {
			DHD_ERROR(("%s: failed to copy data to user buffer\n", __FUNCTION__));
			ret = -EFAULT;
		}
	} else {
		ret = bytes_written;
	}

exit:
	/* net_os_wake_unlock(dev); */
	if (command) {
		kfree(command);
	}

	return ret;
}

int wl_android_init(void)
{
	int ret = 0;

	dhd_msg_level = DHD_ERROR_VAL;
#ifdef ENABLE_INSMOD_NO_FW_LOAD
	dhd_download_fw_on_driverload = FALSE;
#endif /* ENABLE_INSMOD_NO_FW_LOAD */
#ifdef CUSTOMER_HW2
	if (!iface_name[0])
		bcm_strncpy_s(iface_name, IFNAMSIZ, "wlan", IFNAMSIZ);
#endif /* CUSTOMER_HW2 */
	return ret;
}

int wl_android_exit(void)
{
	int ret = 0;

	return ret;
}


/**
 * Functions for Android WiFi card detection
 */
#if defined(CONFIG_WIFI_CONTROL_FUNC)

static int g_wifidev_registered = 0;
static struct semaphore wifi_control_sem;
static struct wifi_platform_data *wifi_control_data = NULL;
static struct resource *wifi_irqres = NULL;

static int wifi_add_dev(void);
static void wifi_del_dev(void);

int wl_android_wifictrl_func_add(void)
{
	int ret = 0;
	sema_init(&wifi_control_sem, 0);

	ret = wifi_add_dev();
	if (ret) {
		DHD_ERROR(("%s: platform_driver_register failed\n", __FUNCTION__));
		return ret;
	}
	g_wifidev_registered = 1;

	/* Waiting callback after platform_driver_register is done or exit with error */
	if (down_timeout(&wifi_control_sem,  msecs_to_jiffies(1000)) != 0) {
		ret = -EINVAL;
		DHD_ERROR(("%s: platform_driver_register timeout\n", __FUNCTION__));
	}

	return ret;
}

void wl_android_wifictrl_func_del(void)
{
	if (g_wifidev_registered)
	{
		wifi_del_dev();
		g_wifidev_registered = 0;
	}
}

void* wl_android_prealloc(int section, unsigned long size)
{
	void *alloc_ptr = NULL;
	if (wifi_control_data && wifi_control_data->mem_prealloc) {
		alloc_ptr = wifi_control_data->mem_prealloc(section, size);
		if (alloc_ptr) {
			DHD_INFO(("success alloc section %d\n", section));
			bzero(alloc_ptr, size);
			return alloc_ptr;
		}
	}

	DHD_ERROR(("can't alloc section %d\n", section));
	return 0;
}

int wifi_get_irq_number(unsigned long *irq_flags_ptr)
{
	if (wifi_irqres) {
		*irq_flags_ptr = wifi_irqres->flags & IRQF_TRIGGER_MASK;
		return (int)wifi_irqres->start;
	}
#ifdef CUSTOM_OOB_GPIO_NUM
	return CUSTOM_OOB_GPIO_NUM;
#else
	return -1;
#endif
}

int wifi_set_power(int on, unsigned long msec)
{
	DHD_ERROR(("%s = %d\n", __FUNCTION__, on));
	if (wifi_control_data && wifi_control_data->set_power) {
		wifi_control_data->set_power(on);
	}
	if (msec)
		mdelay(msec);
	return 0;
}

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 35))
int wifi_get_mac_addr(unsigned char *buf)
{
	DHD_ERROR(("%s\n", __FUNCTION__));
	if (!buf)
		return -EINVAL;
	if (wifi_control_data && wifi_control_data->get_mac_addr) {
		return wifi_control_data->get_mac_addr(buf);
	}
	return -EOPNOTSUPP;
}
#endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 35)) */

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39))
void *wifi_get_country_code(char *ccode)
{
	DHD_TRACE(("%s\n", __FUNCTION__));
	if (!ccode)
		return NULL;
	if (wifi_control_data && wifi_control_data->get_country_code) {
		return wifi_control_data->get_country_code(ccode);
	}
	return NULL;
}
#endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 39)) */

static int wifi_set_carddetect(int on)
{
	DHD_ERROR(("%s = %d\n", __FUNCTION__, on));
	if (wifi_control_data && wifi_control_data->set_carddetect) {
		wifi_control_data->set_carddetect(on);
	}
	return 0;
}

static int wifi_probe(struct platform_device *pdev)
{
	struct wifi_platform_data *wifi_ctrl =
		(struct wifi_platform_data *)(pdev->dev.platform_data);

	DHD_ERROR(("## %s\n", __FUNCTION__));
	wifi_irqres = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "bcmdhd_wlan_irq");
	if (wifi_irqres == NULL)
		wifi_irqres = platform_get_resource_byname(pdev,
			IORESOURCE_IRQ, "bcm4329_wlan_irq");
	wifi_control_data = wifi_ctrl;

	wifi_set_power(1, 0);	/* Power On */
	wifi_set_carddetect(1);	/* CardDetect (0->1) */

	up(&wifi_control_sem);
	return 0;
}

static int wifi_remove(struct platform_device *pdev)
{
	struct wifi_platform_data *wifi_ctrl =
		(struct wifi_platform_data *)(pdev->dev.platform_data);

	DHD_ERROR(("## %s\n", __FUNCTION__));
	wifi_control_data = wifi_ctrl;

	wifi_set_power(0, 0);	/* Power Off */
	wifi_set_carddetect(0);	/* CardDetect (1->0) */

	up(&wifi_control_sem);
	return 0;
}

static int wifi_suspend(struct platform_device *pdev, pm_message_t state)
{
	DHD_TRACE(("##> %s\n", __FUNCTION__));
#if defined(OOB_INTR_ONLY)
	bcmsdh_oob_intr_set(0);
#endif /* (OOB_INTR_ONLY) */
	return 0;
}

static int wifi_resume(struct platform_device *pdev)
{
	DHD_TRACE(("##> %s\n", __FUNCTION__));
#if defined(OOB_INTR_ONLY)
	bcmsdh_oob_intr_set(1);
#endif /* (OOB_INTR_ONLY) */
	return 0;
}

static struct platform_driver wifi_device = {
	.probe          = wifi_probe,
	.remove         = wifi_remove,
	.suspend        = wifi_suspend,
	.resume         = wifi_resume,
	.driver         = {
	.name   = "bcmdhd_wlan",
	}
};

static struct platform_driver wifi_device_legacy = {
	.probe          = wifi_probe,
	.remove         = wifi_remove,
	.suspend        = wifi_suspend,
	.resume         = wifi_resume,
	.driver         = {
	.name   = "bcm4329_wlan",
	}
};

static int wifi_add_dev(void)
{
	DHD_TRACE(("## Calling platform_driver_register\n"));
	platform_driver_register(&wifi_device);
	platform_driver_register(&wifi_device_legacy);
	return 0;
}

static void wifi_del_dev(void)
{
	DHD_TRACE(("## Unregister platform_driver_register\n"));
	platform_driver_unregister(&wifi_device);
	platform_driver_unregister(&wifi_device_legacy);
}
#endif /* defined(CONFIG_WIFI_CONTROL_FUNC) */