/*
* Linux cfg80211 driver - Dongle Host Driver (DHD) related
*
* Copyright (C) 1999-2013, 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_cfg80211.c,v 1.1.4.1.2.14 2011/02/09 01:40:07 Exp $
*/
#include <net/rtnetlink.h>
#include <bcmutils.h>
#include <wldev_common.h>
#include <wl_cfg80211.h>
#include <dhd_cfg80211.h>
#ifdef PKT_FILTER_SUPPORT
#include <dngl_stats.h>
#include <dhd.h>
#endif
extern struct wl_priv *wlcfg_drv_priv;
#ifdef PKT_FILTER_SUPPORT
extern uint dhd_pkt_filter_enable;
extern uint dhd_master_mode;
extern void dhd_pktfilter_offload_enable(dhd_pub_t * dhd, char *arg, int enable, int master_mode);
#endif
static int dhd_dongle_up = FALSE;
#include <dngl_stats.h>
#include <dhd.h>
#include <dhdioctl.h>
#include <wlioctl.h>
#include <dhd_cfg80211.h>
static s32 wl_dongle_up(struct net_device *ndev, u32 up);
/**
* Function implementations
*/
s32 dhd_cfg80211_init(struct wl_priv *wl)
{
dhd_dongle_up = FALSE;
return 0;
}
s32 dhd_cfg80211_deinit(struct wl_priv *wl)
{
dhd_dongle_up = FALSE;
return 0;
}
s32 dhd_cfg80211_down(struct wl_priv *wl)
{
dhd_dongle_up = FALSE;
return 0;
}
s32 dhd_cfg80211_set_p2p_info(struct wl_priv *wl, int val)
{
dhd_pub_t *dhd = (dhd_pub_t *)(wl->pub);
dhd->op_mode |= val;
WL_ERR(("Set : op_mode=0x%04x\n", dhd->op_mode));
#ifdef ARP_OFFLOAD_SUPPORT
if (dhd->arp_version == 1) {
/* IF P2P is enabled, disable arpoe */
dhd_arp_offload_set(dhd, 0);
dhd_arp_offload_enable(dhd, false);
}
#endif /* ARP_OFFLOAD_SUPPORT */
return 0;
}
s32 dhd_cfg80211_clean_p2p_info(struct wl_priv *wl)
{
dhd_pub_t *dhd = (dhd_pub_t *)(wl->pub);
dhd->op_mode &= ~(DHD_FLAG_P2P_GC_MODE | DHD_FLAG_P2P_GO_MODE);
WL_ERR(("Clean : op_mode=0x%04x\n", dhd->op_mode));
#ifdef ARP_OFFLOAD_SUPPORT
if (dhd->arp_version == 1) {
/* IF P2P is disabled, enable arpoe back for STA mode. */
dhd_arp_offload_set(dhd, dhd_arp_mode);
dhd_arp_offload_enable(dhd, true);
}
#endif /* ARP_OFFLOAD_SUPPORT */
return 0;
}
static s32 wl_dongle_up(struct net_device *ndev, u32 up)
{
s32 err = 0;
err = wldev_ioctl(ndev, WLC_UP, &up, sizeof(up), true);
if (unlikely(err)) {
WL_ERR(("WLC_UP error (%d)\n", err));
}
return err;
}
s32 dhd_config_dongle(struct wl_priv *wl, bool need_lock)
{
#ifndef DHD_SDALIGN
#define DHD_SDALIGN 32
#endif
struct net_device *ndev;
s32 err = 0;
WL_TRACE(("In\n"));
if (dhd_dongle_up) {
WL_ERR(("Dongle is already up\n"));
return err;
}
ndev = wl_to_prmry_ndev(wl);
if (need_lock)
rtnl_lock();
err = wl_dongle_up(ndev, 0);
if (unlikely(err)) {
WL_ERR(("wl_dongle_up failed\n"));
goto default_conf_out;
}
dhd_dongle_up = true;
default_conf_out:
if (need_lock)
rtnl_unlock();
return err;
}
#ifdef CONFIG_NL80211_TESTMODE
int dhd_cfg80211_testmode_cmd(struct wiphy *wiphy, void *data, int len)
{
struct sk_buff *reply;
struct wl_priv *wl;
dhd_pub_t *dhd;
dhd_ioctl_t *ioc = data;
int err = 0;
WL_TRACE(("entry: cmd = %d\n", ioc->cmd));
wl = wiphy_priv(wiphy);
dhd = wl->pub;
DHD_OS_WAKE_LOCK(dhd);
/* send to dongle only if we are not waiting for reload already */
if (dhd->hang_was_sent) {
WL_ERR(("HANG was sent up earlier\n"));
DHD_OS_WAKE_LOCK_CTRL_TIMEOUT_ENABLE(dhd, DHD_EVENT_TIMEOUT_MS);
DHD_OS_WAKE_UNLOCK(dhd);
return OSL_ERROR(BCME_DONGLE_DOWN);
}
/* currently there is only one wiphy for ifidx 0 */
err = dhd_ioctl_process(dhd, 0, ioc);
if (err)
goto done;
/* response data is in ioc->buf so return ioc here */
reply = cfg80211_testmode_alloc_reply_skb(wiphy, sizeof(*ioc));
nla_put(reply, NL80211_ATTR_TESTDATA, sizeof(*ioc), ioc);
err = cfg80211_testmode_reply(reply);
done:
DHD_OS_WAKE_UNLOCK(dhd);
return err;
}
#endif /* CONFIG_NL80211_TESTMODE */
/* TODO: clean up the BT-Coex code, it still have some legacy ioctl/iovar functions */
#define COEX_DHCP
#if defined(COEX_DHCP)
/* use New SCO/eSCO smart YG suppression */
#define BT_DHCP_eSCO_FIX
/* this flag boost wifi pkt priority to max, caution: -not fair to sco */
#define BT_DHCP_USE_FLAGS
/* T1 start SCO/ESCo priority suppression */
#define BT_DHCP_OPPR_WIN_TIME 2500
/* T2 turn off SCO/SCO supperesion is (timeout) */
#define BT_DHCP_FLAG_FORCE_TIME 5500
enum wl_cfg80211_btcoex_status {
BT_DHCP_IDLE,
BT_DHCP_START,
BT_DHCP_OPPR_WIN,
BT_DHCP_FLAG_FORCE_TIMEOUT
};
/*
* get named driver variable to uint register value and return error indication
* calling example: dev_wlc_intvar_get_reg(dev, "btc_params",66, ®_value)
*/
static int
dev_wlc_intvar_get_reg(struct net_device *dev, char *name,
uint reg, int *retval)
{
union {
char buf[WLC_IOCTL_SMLEN];
int val;
} var;
int error;
bcm_mkiovar(name, (char *)(®), sizeof(reg),
(char *)(&var), sizeof(var.buf));
error = wldev_ioctl(dev, WLC_GET_VAR, (char *)(&var), sizeof(var.buf), false);
*retval = dtoh32(var.val);
return (error);
}
static int
dev_wlc_bufvar_set(struct net_device *dev, char *name, char *buf, int len)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 31)
char ioctlbuf_local[1024];
#else
static char ioctlbuf_local[1024];
#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 31) */
bcm_mkiovar(name, buf, len, ioctlbuf_local, sizeof(ioctlbuf_local));
return (wldev_ioctl(dev, WLC_SET_VAR, ioctlbuf_local, sizeof(ioctlbuf_local), true));
}
/*
get named driver variable to uint register value and return error indication
calling example: dev_wlc_intvar_set_reg(dev, "btc_params",66, value)
*/
static int
dev_wlc_intvar_set_reg(struct net_device *dev, char *name, char *addr, char * val)
{
char reg_addr[8];
memset(reg_addr, 0, sizeof(reg_addr));
memcpy((char *)®_addr[0], (char *)addr, 4);
memcpy((char *)®_addr[4], (char *)val, 4);
return (dev_wlc_bufvar_set(dev, name, (char *)®_addr[0], sizeof(reg_addr)));
}
static bool btcoex_is_sco_active(struct net_device *dev)
{
int ioc_res = 0;
bool res = FALSE;
int sco_id_cnt = 0;
int param27;
int i;
for (i = 0; i < 12; i++) {
ioc_res = dev_wlc_intvar_get_reg(dev, "btc_params", 27, ¶m27);
WL_TRACE(("sample[%d], btc params: 27:%x\n", i, param27));
if (ioc_res < 0) {
WL_ERR(("ioc read btc params error\n"));
break;
}
if ((param27 & 0x6) == 2) { /* count both sco & esco */
sco_id_cnt++;
}
if (sco_id_cnt > 2) {
WL_TRACE(("sco/esco detected, pkt id_cnt:%d samples:%d\n",
sco_id_cnt, i));
res = TRUE;
break;
}
OSL_SLEEP(5);
}
return res;
}
#if defined(BT_DHCP_eSCO_FIX)
/* Enhanced BT COEX settings for eSCO compatibility during DHCP window */
static int set_btc_esco_params(struct net_device *dev, bool trump_sco)
{
static bool saved_status = FALSE;
char buf_reg50va_dhcp_on[8] =
{ 50, 00, 00, 00, 0x22, 0x80, 0x00, 0x00 };
char buf_reg51va_dhcp_on[8] =
{ 51, 00, 00, 00, 0x00, 0x00, 0x00, 0x00 };
char buf_reg64va_dhcp_on[8] =
{ 64, 00, 00, 00, 0x00, 0x00, 0x00, 0x00 };
char buf_reg65va_dhcp_on[8] =
{ 65, 00, 00, 00, 0x00, 0x00, 0x00, 0x00 };
char buf_reg71va_dhcp_on[8] =
{ 71, 00, 00, 00, 0x00, 0x00, 0x00, 0x00 };
uint32 regaddr;
static uint32 saved_reg50;
static uint32 saved_reg51;
static uint32 saved_reg64;
static uint32 saved_reg65;
static uint32 saved_reg71;
if (trump_sco) {
/* this should reduce eSCO agressive retransmit
* w/o breaking it
*/
/* 1st save current */
WL_TRACE(("Do new SCO/eSCO coex algo {save &"
"override}\n"));
if ((!dev_wlc_intvar_get_reg(dev, "btc_params", 50, &saved_reg50)) &&
(!dev_wlc_intvar_get_reg(dev, "btc_params", 51, &saved_reg51)) &&
(!dev_wlc_intvar_get_reg(dev, "btc_params", 64, &saved_reg64)) &&
(!dev_wlc_intvar_get_reg(dev, "btc_params", 65, &saved_reg65)) &&
(!dev_wlc_intvar_get_reg(dev, "btc_params", 71, &saved_reg71))) {
saved_status = TRUE;
WL_TRACE(("saved bt_params[50,51,64,65,71]:"
"0x%x 0x%x 0x%x 0x%x 0x%x\n",
saved_reg50, saved_reg51,
saved_reg64, saved_reg65, saved_reg71));
} else {
WL_ERR((":%s: save btc_params failed\n",
__FUNCTION__));
saved_status = FALSE;
return -1;
}
WL_TRACE(("override with [50,51,64,65,71]:"
"0x%x 0x%x 0x%x 0x%x 0x%x\n",
*(u32 *)(buf_reg50va_dhcp_on+4),
*(u32 *)(buf_reg51va_dhcp_on+4),
*(u32 *)(buf_reg64va_dhcp_on+4),
*(u32 *)(buf_reg65va_dhcp_on+4),
*(u32 *)(buf_reg71va_dhcp_on+4)));
dev_wlc_bufvar_set(dev, "btc_params",
(char *)&buf_reg50va_dhcp_on[0], 8);
dev_wlc_bufvar_set(dev, "btc_params",
(char *)&buf_reg51va_dhcp_on[0], 8);
dev_wlc_bufvar_set(dev, "btc_params",
(char *)&buf_reg64va_dhcp_on[0], 8);
dev_wlc_bufvar_set(dev, "btc_params",
(char *)&buf_reg65va_dhcp_on[0], 8);
dev_wlc_bufvar_set(dev, "btc_params",
(char *)&buf_reg71va_dhcp_on[0], 8);
saved_status = TRUE;
} else if (saved_status) {
/* restore previously saved bt params */
WL_TRACE(("Do new SCO/eSCO coex algo {save &"
"override}\n"));
regaddr = 50;
dev_wlc_intvar_set_reg(dev, "btc_params",
(char *)®addr, (char *)&saved_reg50);
regaddr = 51;
dev_wlc_intvar_set_reg(dev, "btc_params",
(char *)®addr, (char *)&saved_reg51);
regaddr = 64;
dev_wlc_intvar_set_reg(dev, "btc_params",
(char *)®addr, (char *)&saved_reg64);
regaddr = 65;
dev_wlc_intvar_set_reg(dev, "btc_params",
(char *)®addr, (char *)&saved_reg65);
regaddr = 71;
dev_wlc_intvar_set_reg(dev, "btc_params",
(char *)®addr, (char *)&saved_reg71);
WL_TRACE(("restore bt_params[50,51,64,65,71]:"
"0x%x 0x%x 0x%x 0x%x 0x%x\n",
saved_reg50, saved_reg51, saved_reg64,
saved_reg65, saved_reg71));
saved_status = FALSE;
} else {
WL_ERR((":%s att to restore not saved BTCOEX params\n",
__FUNCTION__));
return -1;
}
return 0;
}
#endif /* BT_DHCP_eSCO_FIX */
static void
wl_cfg80211_bt_setflag(struct net_device *dev, bool set)
{
#if defined(BT_DHCP_USE_FLAGS)
char buf_flag7_dhcp_on[8] = { 7, 00, 00, 00, 0x1, 0x0, 0x00, 0x00 };
char buf_flag7_default[8] = { 7, 00, 00, 00, 0x0, 0x00, 0x00, 0x00};
#endif
#if defined(BT_DHCP_eSCO_FIX)
/* set = 1, save & turn on 0 - off & restore prev settings */
set_btc_esco_params(dev, set);
#endif
#if defined(BT_DHCP_USE_FLAGS)
WL_TRACE(("WI-FI priority boost via bt flags, set:%d\n", set));
if (set == TRUE)
/* Forcing bt_flag7 */
dev_wlc_bufvar_set(dev, "btc_flags",
(char *)&buf_flag7_dhcp_on[0],
sizeof(buf_flag7_dhcp_on));
else
/* Restoring default bt flag7 */
dev_wlc_bufvar_set(dev, "btc_flags",
(char *)&buf_flag7_default[0],
sizeof(buf_flag7_default));
#endif
}
static void wl_cfg80211_bt_timerfunc(ulong data)
{
struct btcoex_info *bt_local = (struct btcoex_info *)data;
WL_TRACE(("Enter\n"));
bt_local->timer_on = 0;
schedule_work(&bt_local->work);
}
static void wl_cfg80211_bt_handler(struct work_struct *work)
{
struct btcoex_info *btcx_inf;
btcx_inf = container_of(work, struct btcoex_info, work);
if (btcx_inf->timer_on) {
btcx_inf->timer_on = 0;
del_timer_sync(&btcx_inf->timer);
}
switch (btcx_inf->bt_state) {
case BT_DHCP_START:
/* DHCP started
* provide OPPORTUNITY window to get DHCP address
*/
WL_TRACE(("bt_dhcp stm: started \n"));
btcx_inf->bt_state = BT_DHCP_OPPR_WIN;
mod_timer(&btcx_inf->timer,
jiffies + msecs_to_jiffies(BT_DHCP_OPPR_WIN_TIME));
btcx_inf->timer_on = 1;
break;
case BT_DHCP_OPPR_WIN:
if (btcx_inf->dhcp_done) {
WL_TRACE(("DHCP Done before T1 expiration\n"));
goto btc_coex_idle;
}
/* DHCP is not over yet, start lowering BT priority
* enforce btc_params + flags if necessary
*/
WL_TRACE(("DHCP T1:%d expired\n", BT_DHCP_OPPR_WIN_TIME));
if (btcx_inf->dev)
wl_cfg80211_bt_setflag(btcx_inf->dev, TRUE);
btcx_inf->bt_state = BT_DHCP_FLAG_FORCE_TIMEOUT;
mod_timer(&btcx_inf->timer,
jiffies + msecs_to_jiffies(BT_DHCP_FLAG_FORCE_TIME));
btcx_inf->timer_on = 1;
break;
case BT_DHCP_FLAG_FORCE_TIMEOUT:
if (btcx_inf->dhcp_done) {
WL_TRACE(("DHCP Done before T2 expiration\n"));
} else {
/* Noo dhcp during T1+T2, restore BT priority */
WL_TRACE(("DHCP wait interval T2:%d msec expired\n",
BT_DHCP_FLAG_FORCE_TIME));
}
/* Restoring default bt priority */
if (btcx_inf->dev)
wl_cfg80211_bt_setflag(btcx_inf->dev, FALSE);
btc_coex_idle:
btcx_inf->bt_state = BT_DHCP_IDLE;
btcx_inf->timer_on = 0;
break;
default:
WL_ERR(("error g_status=%d !!!\n", btcx_inf->bt_state));
if (btcx_inf->dev)
wl_cfg80211_bt_setflag(btcx_inf->dev, FALSE);
btcx_inf->bt_state = BT_DHCP_IDLE;
btcx_inf->timer_on = 0;
break;
}
net_os_wake_unlock(btcx_inf->dev);
}
int wl_cfg80211_btcoex_init(struct wl_priv *wl)
{
struct btcoex_info *btco_inf = NULL;
btco_inf = kmalloc(sizeof(struct btcoex_info), GFP_KERNEL);
if (!btco_inf)
return -ENOMEM;
btco_inf->bt_state = BT_DHCP_IDLE;
btco_inf->ts_dhcp_start = 0;
btco_inf->ts_dhcp_ok = 0;
/* Set up timer for BT */
btco_inf->timer_ms = 10;
init_timer(&btco_inf->timer);
btco_inf->timer.data = (ulong)btco_inf;
btco_inf->timer.function = wl_cfg80211_bt_timerfunc;
btco_inf->dev = wl->wdev->netdev;
INIT_WORK(&btco_inf->work, wl_cfg80211_bt_handler);
wl->btcoex_info = btco_inf;
return 0;
}
void wl_cfg80211_btcoex_deinit(struct wl_priv *wl)
{
if (!wl->btcoex_info)
return;
if (wl->btcoex_info->timer_on) {
wl->btcoex_info->timer_on = 0;
del_timer_sync(&wl->btcoex_info->timer);
}
cancel_work_sync(&wl->btcoex_info->work);
kfree(wl->btcoex_info);
wl->btcoex_info = NULL;
}
int wl_cfg80211_set_btcoex_dhcp(struct net_device *dev, char *command)
{
struct wl_priv *wl = wlcfg_drv_priv;
char powermode_val = 0;
char buf_reg66va_dhcp_on[8] = { 66, 00, 00, 00, 0x10, 0x27, 0x00, 0x00 };
char buf_reg41va_dhcp_on[8] = { 41, 00, 00, 00, 0x33, 0x00, 0x00, 0x00 };
char buf_reg68va_dhcp_on[8] = { 68, 00, 00, 00, 0x90, 0x01, 0x00, 0x00 };
uint32 regaddr;
static uint32 saved_reg66;
static uint32 saved_reg41;
static uint32 saved_reg68;
static bool saved_status = FALSE;
#ifdef COEX_DHCP
char buf_flag7_default[8] = { 7, 00, 00, 00, 0x0, 0x00, 0x00, 0x00};
struct btcoex_info *btco_inf = wl->btcoex_info;
#endif /* COEX_DHCP */
#ifdef PKT_FILTER_SUPPORT
dhd_pub_t *dhd = (dhd_pub_t *)(wl->pub);
#endif
/* Figure out powermode 1 or o command */
strncpy((char *)&powermode_val, command + strlen("BTCOEXMODE") +1, 1);
if (strnicmp((char *)&powermode_val, "1", strlen("1")) == 0) {
WL_TRACE_HW4(("DHCP session starts\n"));
#ifdef PKT_FILTER_SUPPORT
dhd->dhcp_in_progress = 1;
if (dhd->early_suspended) {
WL_TRACE_HW4(("DHCP in progressing , disable packet filter!!!\n"));
dhd_enable_packet_filter(0, dhd);
}
#endif
/* Retrieve and saved orig regs value */
if ((saved_status == FALSE) &&
(!dev_wlc_intvar_get_reg(dev, "btc_params", 66, &saved_reg66)) &&
(!dev_wlc_intvar_get_reg(dev, "btc_params", 41, &saved_reg41)) &&
(!dev_wlc_intvar_get_reg(dev, "btc_params", 68, &saved_reg68))) {
saved_status = TRUE;
WL_TRACE(("Saved 0x%x 0x%x 0x%x\n",
saved_reg66, saved_reg41, saved_reg68));
/* Disable PM mode during dhpc session */
/* Disable PM mode during dhpc session */
#ifdef COEX_DHCP
/* Start BT timer only for SCO connection */
if (btcoex_is_sco_active(dev)) {
/* btc_params 66 */
dev_wlc_bufvar_set(dev, "btc_params",
(char *)&buf_reg66va_dhcp_on[0],
sizeof(buf_reg66va_dhcp_on));
/* btc_params 41 0x33 */
dev_wlc_bufvar_set(dev, "btc_params",
(char *)&buf_reg41va_dhcp_on[0],
sizeof(buf_reg41va_dhcp_on));
/* btc_params 68 0x190 */
dev_wlc_bufvar_set(dev, "btc_params",
(char *)&buf_reg68va_dhcp_on[0],
sizeof(buf_reg68va_dhcp_on));
saved_status = TRUE;
btco_inf->bt_state = BT_DHCP_START;
btco_inf->timer_on = 1;
mod_timer(&btco_inf->timer, btco_inf->timer.expires);
WL_TRACE(("enable BT DHCP Timer\n"));
}
#endif /* COEX_DHCP */
}
else if (saved_status == TRUE) {
WL_ERR(("was called w/o DHCP OFF. Continue\n"));
}
}
else if (strnicmp((char *)&powermode_val, "2", strlen("2")) == 0) {
#ifdef PKT_FILTER_SUPPORT
dhd->dhcp_in_progress = 0;
WL_TRACE_HW4(("DHCP is complete \n"));
/* Enable packet filtering */
if (dhd->early_suspended) {
WL_TRACE_HW4(("DHCP is complete , enable packet filter!!!\n"));
dhd_enable_packet_filter(1, dhd);
}
#endif /* PKT_FILTER_SUPPORT */
/* Restoring PM mode */
#ifdef COEX_DHCP
/* Stop any bt timer because DHCP session is done */
WL_TRACE(("disable BT DHCP Timer\n"));
if (btco_inf->timer_on) {
btco_inf->timer_on = 0;
del_timer_sync(&btco_inf->timer);
if (btco_inf->bt_state != BT_DHCP_IDLE) {
/* need to restore original btc flags & extra btc params */
WL_TRACE(("bt->bt_state:%d\n", btco_inf->bt_state));
/* wake up btcoex thread to restore btlags+params */
schedule_work(&btco_inf->work);
}
}
/* Restoring btc_flag paramter anyway */
if (saved_status == TRUE)
dev_wlc_bufvar_set(dev, "btc_flags",
(char *)&buf_flag7_default[0], sizeof(buf_flag7_default));
#endif /* COEX_DHCP */
/* Restore original values */
if (saved_status == TRUE) {
regaddr = 66;
dev_wlc_intvar_set_reg(dev, "btc_params",
(char *)®addr, (char *)&saved_reg66);
regaddr = 41;
dev_wlc_intvar_set_reg(dev, "btc_params",
(char *)®addr, (char *)&saved_reg41);
regaddr = 68;
dev_wlc_intvar_set_reg(dev, "btc_params",
(char *)®addr, (char *)&saved_reg68);
WL_TRACE(("restore regs {66,41,68} <- 0x%x 0x%x 0x%x\n",
saved_reg66, saved_reg41, saved_reg68));
}
saved_status = FALSE;
}
else {
WL_ERR(("Unkwown yet power setting, ignored\n"));
}
snprintf(command, 3, "OK");
return (strlen("OK"));
}
#endif