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usb.c
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usb.c
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/******************************************************************************
*
* Copyright( c ) 2009-2012 Realtek Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
*
* The full GNU General Public License is included in this distribution in the
* file called LICENSE.
*
* Contact Information:
* wlanfae <wlanfae@realtek.com>
* Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
* Hsinchu 300, Taiwan.
*
*
* Bug Fixes and enhancements for Linux Kernels >= 3.2
* by Benjamin Porter <BenjaminPorter86@gmail.com>
*
* Project homepage: https://github.com/FreedomBen/rtl8188ce-linux-driver
*
*
*****************************************************************************/
#include "wifi.h"
#include "core.h"
#include "usb.h"
#include "base.h"
#include "ps.h"
#include "rtl8192c/fw_common.h"
#include <linux/export.h>
#include <linux/module.h>
MODULE_AUTHOR( "lizhaoming <chaoming_li@realsil.com.cn>" );
MODULE_AUTHOR( "Realtek WlanFAE <wlanfae@realtek.com>" );
MODULE_AUTHOR( "Larry Finger <Larry.FInger@lwfinger.net>" );
MODULE_LICENSE( "GPL" );
MODULE_DESCRIPTION( "USB basic driver for rtlwifi" );
#define REALTEK_USB_VENQT_READ 0xC0
#define REALTEK_USB_VENQT_WRITE 0x40
#define REALTEK_USB_VENQT_CMD_REQ 0x05
#define REALTEK_USB_VENQT_CMD_IDX 0x00
#define MAX_USBCTRL_VENDORREQ_TIMES 10
static void usbctrl_async_callback( struct urb *urb )
{
if ( urb ) {
/* free dr */
kfree( urb->setup_packet );
/* free databuf */
kfree( urb->transfer_buffer );
}
}
static int _usbctrl_vendorreq_async_write( struct usb_device *udev, u8 request,
u16 value, u16 index, void *pdata,
u16 len )
{
int rc;
unsigned int pipe;
u8 reqtype;
struct usb_ctrlrequest *dr;
struct urb *urb;
const u16 databuf_maxlen = REALTEK_USB_VENQT_MAX_BUF_SIZE;
u8 *databuf;
if ( WARN_ON_ONCE( len > databuf_maxlen ) )
len = databuf_maxlen;
pipe = usb_sndctrlpipe( udev, 0 ); /* write_out */
reqtype = REALTEK_USB_VENQT_WRITE;
dr = kzalloc( sizeof( *dr ), GFP_ATOMIC );
if ( !dr )
return -ENOMEM;
databuf = kzalloc( databuf_maxlen, GFP_ATOMIC );
if ( !databuf ) {
kfree( dr );
return -ENOMEM;
}
urb = usb_alloc_urb( 0, GFP_ATOMIC );
if ( !urb ) {
kfree( databuf );
kfree( dr );
return -ENOMEM;
}
dr->bRequestType = reqtype;
dr->bRequest = request;
dr->wValue = cpu_to_le16( value );
dr->wIndex = cpu_to_le16( index );
dr->wLength = cpu_to_le16( len );
/* data are already in little-endian order */
memcpy( databuf, pdata, len );
usb_fill_control_urb( urb, udev, pipe,
( unsigned char * )dr, databuf, len,
usbctrl_async_callback, NULL );
rc = usb_submit_urb( urb, GFP_ATOMIC );
if ( rc < 0 ) {
kfree( databuf );
kfree( dr );
}
usb_free_urb( urb );
return rc;
}
static int _usbctrl_vendorreq_sync_read( struct usb_device *udev, u8 request,
u16 value, u16 index, void *pdata,
u16 len )
{
unsigned int pipe;
int status;
u8 reqtype;
int vendorreq_times = 0;
static int count;
pipe = usb_rcvctrlpipe( udev, 0 ); /* read_in */
reqtype = REALTEK_USB_VENQT_READ;
do {
status = usb_control_msg( udev, pipe, request, reqtype, value,
index, pdata, len, 0 ); /*max. timeout*/
if ( status < 0 ) {
/* firmware download is checksumed, don't retry */
if ( ( value >= FW_8192C_START_ADDRESS &&
value <= FW_8192C_END_ADDRESS ) )
break;
} else {
break;
}
} while ( ++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES );
if ( status < 0 && count++ < 4 )
pr_err( "reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n",
value, status, *( u32 * )pdata );
return status;
}
static u32 _usb_read_sync( struct rtl_priv *rtlpriv, u32 addr, u16 len )
{
struct device *dev = rtlpriv->io.dev;
struct usb_device *udev = to_usb_device( dev );
u8 request;
u16 wvalue;
u16 index;
__le32 *data;
unsigned long flags;
spin_lock_irqsave( &rtlpriv->locks.usb_lock, flags );
if ( ++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT )
rtlpriv->usb_data_index = 0;
data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
spin_unlock_irqrestore( &rtlpriv->locks.usb_lock, flags );
request = REALTEK_USB_VENQT_CMD_REQ;
index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
wvalue = ( u16 )addr;
_usbctrl_vendorreq_sync_read( udev, request, wvalue, index, data, len );
return le32_to_cpu( *data );
}
static u8 _usb_read8_sync( struct rtl_priv *rtlpriv, u32 addr )
{
return ( u8 )_usb_read_sync( rtlpriv, addr, 1 );
}
static u16 _usb_read16_sync( struct rtl_priv *rtlpriv, u32 addr )
{
return ( u16 )_usb_read_sync( rtlpriv, addr, 2 );
}
static u32 _usb_read32_sync( struct rtl_priv *rtlpriv, u32 addr )
{
return _usb_read_sync( rtlpriv, addr, 4 );
}
static void _usb_write_async( struct usb_device *udev, u32 addr, u32 val,
u16 len )
{
u8 request;
u16 wvalue;
u16 index;
__le32 data;
request = REALTEK_USB_VENQT_CMD_REQ;
index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
wvalue = ( u16 )( addr&0x0000ffff );
data = cpu_to_le32( val );
_usbctrl_vendorreq_async_write( udev, request, wvalue, index, &data,
len );
}
static void _usb_write8_async( struct rtl_priv *rtlpriv, u32 addr, u8 val )
{
struct device *dev = rtlpriv->io.dev;
_usb_write_async( to_usb_device( dev ), addr, val, 1 );
}
static void _usb_write16_async( struct rtl_priv *rtlpriv, u32 addr, u16 val )
{
struct device *dev = rtlpriv->io.dev;
_usb_write_async( to_usb_device( dev ), addr, val, 2 );
}
static void _usb_write32_async( struct rtl_priv *rtlpriv, u32 addr, u32 val )
{
struct device *dev = rtlpriv->io.dev;
_usb_write_async( to_usb_device( dev ), addr, val, 4 );
}
static void _usb_writeN_sync( struct rtl_priv *rtlpriv, u32 addr, void *data,
u16 len )
{
struct device *dev = rtlpriv->io.dev;
struct usb_device *udev = to_usb_device( dev );
u8 request = REALTEK_USB_VENQT_CMD_REQ;
u8 reqtype = REALTEK_USB_VENQT_WRITE;
u16 wvalue;
u16 index = REALTEK_USB_VENQT_CMD_IDX;
int pipe = usb_sndctrlpipe( udev, 0 ); /* write_out */
u8 *buffer;
wvalue = ( u16 )( addr & 0x0000ffff );
buffer = kmemdup( data, len, GFP_ATOMIC );
if ( !buffer )
return;
usb_control_msg( udev, pipe, request, reqtype, wvalue,
index, buffer, len, 50 );
kfree( buffer );
}
static void _rtl_usb_io_handler_init( struct device *dev,
struct ieee80211_hw *hw )
{
struct rtl_priv *rtlpriv = rtl_priv( hw );
rtlpriv->io.dev = dev;
mutex_init( &rtlpriv->io.bb_mutex );
rtlpriv->io.write8_async = _usb_write8_async;
rtlpriv->io.write16_async = _usb_write16_async;
rtlpriv->io.write32_async = _usb_write32_async;
rtlpriv->io.read8_sync = _usb_read8_sync;
rtlpriv->io.read16_sync = _usb_read16_sync;
rtlpriv->io.read32_sync = _usb_read32_sync;
rtlpriv->io.writeN_sync = _usb_writeN_sync;
}
static void _rtl_usb_io_handler_release( struct ieee80211_hw *hw )
{
struct rtl_priv __maybe_unused *rtlpriv = rtl_priv( hw );
mutex_destroy( &rtlpriv->io.bb_mutex );
}
/**
*
* Default aggregation handler. Do nothing and just return the oldest skb.
*/
static struct sk_buff *_none_usb_tx_aggregate_hdl( struct ieee80211_hw *hw,
struct sk_buff_head *list )
{
return skb_dequeue( list );
}
#define IS_HIGH_SPEED_USB( udev ) \
( ( USB_SPEED_HIGH == ( udev )->speed ) ? true : false )
static int _rtl_usb_init_tx( struct ieee80211_hw *hw )
{
u32 i;
struct rtl_priv *rtlpriv = rtl_priv( hw );
struct rtl_usb *rtlusb = rtl_usbdev( rtl_usbpriv( hw ) );
rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB( rtlusb->udev )
? USB_HIGH_SPEED_BULK_SIZE
: USB_FULL_SPEED_BULK_SIZE;
RT_TRACE( rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n",
rtlusb->max_bulk_out_size );
for ( i = 0; i < __RTL_TXQ_NUM; i++ ) {
u32 ep_num = rtlusb->ep_map.ep_mapping[i];
if ( !ep_num ) {
RT_TRACE( rtlpriv, COMP_INIT, DBG_DMESG,
"Invalid endpoint map setting!\n" );
return -EINVAL;
}
}
rtlusb->usb_tx_post_hdl =
rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
rtlusb->usb_tx_cleanup =
rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
rtlusb->usb_tx_aggregate_hdl =
( rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl )
? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
: &_none_usb_tx_aggregate_hdl;
init_usb_anchor( &rtlusb->tx_submitted );
for ( i = 0; i < RTL_USB_MAX_EP_NUM; i++ ) {
skb_queue_head_init( &rtlusb->tx_skb_queue[i] );
init_usb_anchor( &rtlusb->tx_pending[i] );
}
return 0;
}
static void _rtl_rx_work( unsigned long param );
static int _rtl_usb_init_rx( struct ieee80211_hw *hw )
{
struct rtl_priv *rtlpriv = rtl_priv( hw );
struct rtl_usb_priv *usb_priv = rtl_usbpriv( hw );
struct rtl_usb *rtlusb = rtl_usbdev( usb_priv );
rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
rtlusb->usb_rx_segregate_hdl =
rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
pr_info( "rx_max_size %d, rx_urb_num %d, in_ep %d\n",
rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep );
init_usb_anchor( &rtlusb->rx_submitted );
init_usb_anchor( &rtlusb->rx_cleanup_urbs );
skb_queue_head_init( &rtlusb->rx_queue );
rtlusb->rx_work_tasklet.func = _rtl_rx_work;
rtlusb->rx_work_tasklet.data = ( unsigned long )rtlusb;
return 0;
}
static int _rtl_usb_init( struct ieee80211_hw *hw )
{
struct rtl_priv *rtlpriv = rtl_priv( hw );
struct rtl_usb_priv *usb_priv = rtl_usbpriv( hw );
struct rtl_usb *rtlusb = rtl_usbdev( usb_priv );
int err;
u8 epidx;
struct usb_interface *usb_intf = rtlusb->intf;
u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
for ( epidx = 0; epidx < epnums; epidx++ ) {
struct usb_endpoint_descriptor *pep_desc;
pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
if ( usb_endpoint_dir_in( pep_desc ) )
rtlusb->in_ep_nums++;
else if ( usb_endpoint_dir_out( pep_desc ) )
rtlusb->out_ep_nums++;
RT_TRACE( rtlpriv, COMP_INIT, DBG_DMESG,
"USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n",
pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
pep_desc->bInterval );
}
if ( rtlusb->in_ep_nums < rtlpriv->cfg->usb_interface_cfg->in_ep_num ) {
pr_err( "Too few input end points found\n" );
return -EINVAL;
}
if ( rtlusb->out_ep_nums == 0 ) {
pr_err( "No output end points found\n" );
return -EINVAL;
}
/* usb endpoint mapping */
err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping( hw );
rtlusb->usb_mq_to_hwq = rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
_rtl_usb_init_tx( hw );
_rtl_usb_init_rx( hw );
return err;
}
static void rtl_usb_init_sw( struct ieee80211_hw *hw )
{
struct rtl_mac *mac = rtl_mac( rtl_priv( hw ) );
struct rtl_hal *rtlhal = rtl_hal( rtl_priv( hw ) );
struct rtl_ps_ctl *ppsc = rtl_psc( rtl_priv( hw ) );
struct rtl_usb *rtlusb = rtl_usbdev( rtl_usbpriv( hw ) );
rtlhal->hw = hw;
ppsc->inactiveps = false;
ppsc->leisure_ps = false;
ppsc->fwctrl_lps = false;
ppsc->reg_fwctrl_lps = 3;
ppsc->reg_max_lps_awakeintvl = 5;
ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
/* IBSS */
mac->beacon_interval = 100;
/* AMPDU */
mac->min_space_cfg = 0;
mac->max_mss_density = 0;
/* set sane AMPDU defaults */
mac->current_ampdu_density = 7;
mac->current_ampdu_factor = 3;
/* QOS */
rtlusb->acm_method = EACMWAY2_SW;
/* IRQ */
/* HIMR - turn all on */
rtlusb->irq_mask[0] = 0xFFFFFFFF;
/* HIMR_EX - turn all on */
rtlusb->irq_mask[1] = 0xFFFFFFFF;
rtlusb->disableHWSM = true;
}
static void _rtl_rx_completed( struct urb *urb );
static int _rtl_prep_rx_urb( struct ieee80211_hw *hw, struct rtl_usb *rtlusb,
struct urb *urb, gfp_t gfp_mask )
{
struct rtl_priv *rtlpriv = rtl_priv( hw );
void *buf;
buf = usb_alloc_coherent( rtlusb->udev, rtlusb->rx_max_size, gfp_mask,
&urb->transfer_dma );
if ( !buf ) {
RT_TRACE( rtlpriv, COMP_USB, DBG_EMERG,
"Failed to usb_alloc_coherent!!\n" );
return -ENOMEM;
}
usb_fill_bulk_urb( urb, rtlusb->udev,
usb_rcvbulkpipe( rtlusb->udev, rtlusb->in_ep ),
buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb );
urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
return 0;
}
static void _rtl_usb_rx_process_agg( struct ieee80211_hw *hw,
struct sk_buff *skb )
{
struct rtl_priv *rtlpriv = rtl_priv( hw );
u8 *rxdesc = skb->data;
struct ieee80211_hdr *hdr;
bool unicast = false;
__le16 fc;
struct ieee80211_rx_status rx_status = {0};
struct rtl_stats stats = {
.signal = 0,
.rate = 0,
};
skb_pull( skb, RTL_RX_DESC_SIZE );
rtlpriv->cfg->ops->query_rx_desc( hw, &stats, &rx_status, rxdesc, skb );
skb_pull( skb, ( stats.rx_drvinfo_size + stats.rx_bufshift ) );
hdr = ( struct ieee80211_hdr * )( skb->data );
fc = hdr->frame_control;
if ( !stats.crc ) {
memcpy( IEEE80211_SKB_RXCB( skb ), &rx_status, sizeof( rx_status ) );
if ( is_broadcast_ether_addr( hdr->addr1 ) ) {
/*TODO*/;
} else if ( is_multicast_ether_addr( hdr->addr1 ) ) {
/*TODO*/
} else {
unicast = true;
rtlpriv->stats.rxbytesunicast += skb->len;
}
if ( ieee80211_is_data( fc ) ) {
rtlpriv->cfg->ops->led_control( hw, LED_CTL_RX );
if ( unicast )
rtlpriv->link_info.num_rx_inperiod++;
}
/* static bcn for roaming */
rtl_beacon_statistic( hw, skb );
}
}
static void _rtl_usb_rx_process_noagg( struct ieee80211_hw *hw,
struct sk_buff *skb )
{
struct rtl_priv *rtlpriv = rtl_priv( hw );
u8 *rxdesc = skb->data;
struct ieee80211_hdr *hdr;
bool unicast = false;
__le16 fc;
struct ieee80211_rx_status rx_status = {0};
struct rtl_stats stats = {
.signal = 0,
.rate = 0,
};
skb_pull( skb, RTL_RX_DESC_SIZE );
rtlpriv->cfg->ops->query_rx_desc( hw, &stats, &rx_status, rxdesc, skb );
skb_pull( skb, ( stats.rx_drvinfo_size + stats.rx_bufshift ) );
hdr = ( struct ieee80211_hdr * )( skb->data );
fc = hdr->frame_control;
if ( !stats.crc ) {
memcpy( IEEE80211_SKB_RXCB( skb ), &rx_status, sizeof( rx_status ) );
if ( is_broadcast_ether_addr( hdr->addr1 ) ) {
/*TODO*/;
} else if ( is_multicast_ether_addr( hdr->addr1 ) ) {
/*TODO*/
} else {
unicast = true;
rtlpriv->stats.rxbytesunicast += skb->len;
}
if ( ieee80211_is_data( fc ) ) {
rtlpriv->cfg->ops->led_control( hw, LED_CTL_RX );
if ( unicast )
rtlpriv->link_info.num_rx_inperiod++;
}
/* static bcn for roaming */
rtl_beacon_statistic( hw, skb );
if ( likely( rtl_action_proc( hw, skb, false ) ) )
ieee80211_rx( hw, skb );
else
dev_kfree_skb_any( skb );
}
}
static void _rtl_rx_pre_process( struct ieee80211_hw *hw, struct sk_buff *skb )
{
struct sk_buff *_skb;
struct sk_buff_head rx_queue;
struct rtl_usb *rtlusb = rtl_usbdev( rtl_usbpriv( hw ) );
skb_queue_head_init( &rx_queue );
if ( rtlusb->usb_rx_segregate_hdl )
rtlusb->usb_rx_segregate_hdl( hw, skb, &rx_queue );
WARN_ON( skb_queue_empty( &rx_queue ) );
while ( !skb_queue_empty( &rx_queue ) ) {
_skb = skb_dequeue( &rx_queue );
_rtl_usb_rx_process_agg( hw, _skb );
ieee80211_rx( hw, _skb );
}
}
#define __RX_SKB_MAX_QUEUED 64
static void _rtl_rx_work( unsigned long param )
{
struct rtl_usb *rtlusb = ( struct rtl_usb * )param;
struct ieee80211_hw *hw = usb_get_intfdata( rtlusb->intf );
struct sk_buff *skb;
while ( ( skb = skb_dequeue( &rtlusb->rx_queue ) ) ) {
if ( unlikely( IS_USB_STOP( rtlusb ) ) ) {
dev_kfree_skb_any( skb );
continue;
}
if ( likely( !rtlusb->usb_rx_segregate_hdl ) ) {
_rtl_usb_rx_process_noagg( hw, skb );
} else {
/* TO DO */
_rtl_rx_pre_process( hw, skb );
pr_err( "rx agg not supported\n" );
}
}
}
static unsigned int _rtl_rx_get_padding( struct ieee80211_hdr *hdr,
unsigned int len )
{
#if NET_IP_ALIGN != 0
unsigned int padding = 0;
#endif
/* make function no-op when possible */
if ( NET_IP_ALIGN == 0 || len < sizeof( *hdr ) )
return 0;
#if NET_IP_ALIGN != 0
/* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */
/* TODO: deduplicate common code, define helper function instead? */
if ( ieee80211_is_data_qos( hdr->frame_control ) ) {
u8 *qc = ieee80211_get_qos_ctl( hdr );
padding ^= NET_IP_ALIGN;
/* Input might be invalid, avoid accessing memory outside
* the buffer.
*/
if ( ( unsigned long )qc - ( unsigned long )hdr < len &&
*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT )
padding ^= NET_IP_ALIGN;
}
if ( ieee80211_has_a4( hdr->frame_control ) )
padding ^= NET_IP_ALIGN;
return padding;
#endif
}
#define __RADIO_TAP_SIZE_RSV 32
static void _rtl_rx_completed( struct urb *_urb )
{
struct rtl_usb *rtlusb = ( struct rtl_usb * )_urb->context;
struct ieee80211_hw *hw = usb_get_intfdata( rtlusb->intf );
struct rtl_priv *rtlpriv = rtl_priv( hw );
int err = 0;
if ( unlikely( IS_USB_STOP( rtlusb ) ) )
goto free;
if ( likely( 0 == _urb->status ) ) {
unsigned int padding;
struct sk_buff *skb;
unsigned int qlen;
unsigned int size = _urb->actual_length;
struct ieee80211_hdr *hdr;
if ( size < RTL_RX_DESC_SIZE + sizeof( struct ieee80211_hdr ) ) {
RT_TRACE( rtlpriv, COMP_USB, DBG_EMERG,
"Too short packet from bulk IN! (len: %d)\n",
size );
goto resubmit;
}
qlen = skb_queue_len( &rtlusb->rx_queue );
if ( qlen >= __RX_SKB_MAX_QUEUED ) {
RT_TRACE( rtlpriv, COMP_USB, DBG_EMERG,
"Pending RX skbuff queue full! (qlen: %d)\n",
qlen );
goto resubmit;
}
hdr = ( void * )( _urb->transfer_buffer + RTL_RX_DESC_SIZE );
padding = _rtl_rx_get_padding( hdr, size - RTL_RX_DESC_SIZE );
skb = dev_alloc_skb( size + __RADIO_TAP_SIZE_RSV + padding );
if ( !skb ) {
RT_TRACE( rtlpriv, COMP_USB, DBG_EMERG,
"Can't allocate skb for bulk IN!\n" );
goto resubmit;
}
_rtl_install_trx_info( rtlusb, skb, rtlusb->in_ep );
/* Make sure the payload data is 4 byte aligned. */
skb_reserve( skb, padding );
/* reserve some space for mac80211's radiotap */
skb_reserve( skb, __RADIO_TAP_SIZE_RSV );
memcpy( skb_put( skb, size ), _urb->transfer_buffer, size );
skb_queue_tail( &rtlusb->rx_queue, skb );
tasklet_schedule( &rtlusb->rx_work_tasklet );
goto resubmit;
}
switch ( _urb->status ) {
/* disconnect */
case -ENOENT:
case -ECONNRESET:
case -ENODEV:
case -ESHUTDOWN:
goto free;
default:
break;
}
resubmit:
usb_anchor_urb( _urb, &rtlusb->rx_submitted );
err = usb_submit_urb( _urb, GFP_ATOMIC );
if ( unlikely( err ) ) {
usb_unanchor_urb( _urb );
goto free;
}
return;
free:
/* On some architectures, usb_free_coherent must not be called from
* hardirq context. Queue urb to cleanup list.
*/
usb_anchor_urb( _urb, &rtlusb->rx_cleanup_urbs );
}
#undef __RADIO_TAP_SIZE_RSV
static void _rtl_usb_cleanup_rx( struct ieee80211_hw *hw )
{
struct rtl_usb *rtlusb = rtl_usbdev( rtl_usbpriv( hw ) );
struct urb *urb;
usb_kill_anchored_urbs( &rtlusb->rx_submitted );
tasklet_kill( &rtlusb->rx_work_tasklet );
skb_queue_purge( &rtlusb->rx_queue );
while ( ( urb = usb_get_from_anchor( &rtlusb->rx_cleanup_urbs ) ) ) {
usb_free_coherent( urb->dev, urb->transfer_buffer_length,
urb->transfer_buffer, urb->transfer_dma );
usb_free_urb( urb );
}
}
static int _rtl_usb_receive( struct ieee80211_hw *hw )
{
struct urb *urb;
int err;
int i;
struct rtl_priv *rtlpriv = rtl_priv( hw );
struct rtl_usb *rtlusb = rtl_usbdev( rtl_usbpriv( hw ) );
WARN_ON( 0 == rtlusb->rx_urb_num );
/* 1600 == 1514 + max WLAN header + rtk info */
WARN_ON( rtlusb->rx_max_size < 1600 );
for ( i = 0; i < rtlusb->rx_urb_num; i++ ) {
err = -ENOMEM;
urb = usb_alloc_urb( 0, GFP_KERNEL );
if ( !urb ) {
RT_TRACE( rtlpriv, COMP_USB, DBG_EMERG,
"Failed to alloc URB!!\n" );
goto err_out;
}
err = _rtl_prep_rx_urb( hw, rtlusb, urb, GFP_KERNEL );
if ( err < 0 ) {
RT_TRACE( rtlpriv, COMP_USB, DBG_EMERG,
"Failed to prep_rx_urb!!\n" );
usb_free_urb( urb );
goto err_out;
}
usb_anchor_urb( urb, &rtlusb->rx_submitted );
err = usb_submit_urb( urb, GFP_KERNEL );
if ( err )
goto err_out;
usb_free_urb( urb );
}
return 0;
err_out:
usb_kill_anchored_urbs( &rtlusb->rx_submitted );
_rtl_usb_cleanup_rx( hw );
return err;
}
static int rtl_usb_start( struct ieee80211_hw *hw )
{
int err;
struct rtl_priv *rtlpriv = rtl_priv( hw );
struct rtl_hal *rtlhal = rtl_hal( rtl_priv( hw ) );
struct rtl_usb *rtlusb = rtl_usbdev( rtl_usbpriv( hw ) );
err = rtlpriv->cfg->ops->hw_init( hw );
if ( !err ) {
rtl_init_rx_config( hw );
/* Enable software */
SET_USB_START( rtlusb );
/* should after adapter start and interrupt enable. */
set_hal_start( rtlhal );
/* Start bulk IN */
err = _rtl_usb_receive( hw );
}
return err;
}
/**
*
*
*/
/*======================= tx =========================================*/
static void rtl_usb_cleanup( struct ieee80211_hw *hw )
{
u32 i;
struct sk_buff *_skb;
struct rtl_usb *rtlusb = rtl_usbdev( rtl_usbpriv( hw ) );
struct ieee80211_tx_info *txinfo;
SET_USB_STOP( rtlusb );
/* clean up rx stuff. */
_rtl_usb_cleanup_rx( hw );
/* clean up tx stuff */
for ( i = 0; i < RTL_USB_MAX_EP_NUM; i++ ) {
while ( ( _skb = skb_dequeue( &rtlusb->tx_skb_queue[i] ) ) ) {
rtlusb->usb_tx_cleanup( hw, _skb );
txinfo = IEEE80211_SKB_CB( _skb );
ieee80211_tx_info_clear_status( txinfo );
txinfo->flags |= IEEE80211_TX_STAT_ACK;
ieee80211_tx_status_irqsafe( hw, _skb );
}
usb_kill_anchored_urbs( &rtlusb->tx_pending[i] );
}
usb_kill_anchored_urbs( &rtlusb->tx_submitted );
}
/**
*
* We may add some struct into struct rtl_usb later. Do deinit here.
*
*/
static void rtl_usb_deinit( struct ieee80211_hw *hw )
{
rtl_usb_cleanup( hw );
}
static void rtl_usb_stop( struct ieee80211_hw *hw )
{
struct rtl_priv *rtlpriv = rtl_priv( hw );
struct rtl_hal *rtlhal = rtl_hal( rtl_priv( hw ) );
struct rtl_usb *rtlusb = rtl_usbdev( rtl_usbpriv( hw ) );
/* should after adapter start and interrupt enable. */
set_hal_stop( rtlhal );
cancel_work_sync( &rtlpriv->works.fill_h2c_cmd );
/* Enable software */
SET_USB_STOP( rtlusb );
rtl_usb_deinit( hw );
rtlpriv->cfg->ops->hw_disable( hw );
}
static void _rtl_submit_tx_urb( struct ieee80211_hw *hw, struct urb *_urb )
{
int err;
struct rtl_priv *rtlpriv = rtl_priv( hw );
struct rtl_usb *rtlusb = rtl_usbdev( rtl_usbpriv( hw ) );
usb_anchor_urb( _urb, &rtlusb->tx_submitted );
err = usb_submit_urb( _urb, GFP_ATOMIC );
if ( err < 0 ) {
struct sk_buff *skb;
RT_TRACE( rtlpriv, COMP_USB, DBG_EMERG,
"Failed to submit urb\n" );
usb_unanchor_urb( _urb );
skb = ( struct sk_buff * )_urb->context;
kfree_skb( skb );
}
usb_free_urb( _urb );
}
static int _usb_tx_post( struct ieee80211_hw *hw, struct urb *urb,
struct sk_buff *skb )
{
struct rtl_priv *rtlpriv = rtl_priv( hw );
struct rtl_usb *rtlusb = rtl_usbdev( rtl_usbpriv( hw ) );
struct ieee80211_tx_info *txinfo;
rtlusb->usb_tx_post_hdl( hw, urb, skb );
skb_pull( skb, RTL_TX_HEADER_SIZE );
txinfo = IEEE80211_SKB_CB( skb );
ieee80211_tx_info_clear_status( txinfo );
txinfo->flags |= IEEE80211_TX_STAT_ACK;
if ( urb->status ) {
RT_TRACE( rtlpriv, COMP_USB, DBG_EMERG,
"Urb has error status 0x%X\n", urb->status );
goto out;
}
/* TODO: statistics */
out:
ieee80211_tx_status_irqsafe( hw, skb );
return urb->status;
}
static void _rtl_tx_complete( struct urb *urb )
{
struct sk_buff *skb = ( struct sk_buff * )urb->context;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB( skb );
struct rtl_usb *rtlusb = ( struct rtl_usb * )info->rate_driver_data[0];
struct ieee80211_hw *hw = usb_get_intfdata( rtlusb->intf );
int err;
if ( unlikely( IS_USB_STOP( rtlusb ) ) )
return;
err = _usb_tx_post( hw, urb, skb );
if ( err ) {
/* Ignore error and keep issuiing other urbs */
return;
}
}
static struct urb *_rtl_usb_tx_urb_setup( struct ieee80211_hw *hw,
struct sk_buff *skb, u32 ep_num )
{
struct rtl_priv *rtlpriv = rtl_priv( hw );
struct rtl_usb *rtlusb = rtl_usbdev( rtl_usbpriv( hw ) );
struct urb *_urb;
WARN_ON( NULL == skb );
_urb = usb_alloc_urb( 0, GFP_ATOMIC );
if ( !_urb ) {
RT_TRACE( rtlpriv, COMP_USB, DBG_EMERG,
"Can't allocate URB for bulk out!\n" );
kfree_skb( skb );
return NULL;
}
_rtl_install_trx_info( rtlusb, skb, ep_num );
usb_fill_bulk_urb( _urb, rtlusb->udev, usb_sndbulkpipe( rtlusb->udev,
ep_num ), skb->data, skb->len, _rtl_tx_complete, skb );
_urb->transfer_flags |= URB_ZERO_PACKET;
return _urb;
}
static void _rtl_usb_transmit( struct ieee80211_hw *hw, struct sk_buff *skb,
enum rtl_txq qnum )
{
struct rtl_priv *rtlpriv = rtl_priv( hw );
struct rtl_usb *rtlusb = rtl_usbdev( rtl_usbpriv( hw ) );
u32 ep_num;
struct urb *_urb = NULL;
struct sk_buff *_skb = NULL;
WARN_ON( NULL == rtlusb->usb_tx_aggregate_hdl );
if ( unlikely( IS_USB_STOP( rtlusb ) ) ) {
RT_TRACE( rtlpriv, COMP_USB, DBG_EMERG,
"USB device is stopping...\n" );
kfree_skb( skb );
return;
}
ep_num = rtlusb->ep_map.ep_mapping[qnum];
_skb = skb;
_urb = _rtl_usb_tx_urb_setup( hw, _skb, ep_num );
if ( unlikely( !_urb ) ) {
RT_TRACE( rtlpriv, COMP_ERR, DBG_EMERG,
"Can't allocate urb. Drop skb!\n" );
kfree_skb( skb );
return;
}
_rtl_submit_tx_urb( hw, _urb );
}
static void _rtl_usb_tx_preprocess( struct ieee80211_hw *hw,
struct ieee80211_sta *sta,
struct sk_buff *skb,
u16 hw_queue )
{
struct rtl_priv *rtlpriv = rtl_priv( hw );
struct rtl_mac *mac = rtl_mac( rtl_priv( hw ) );
struct ieee80211_tx_info *info = IEEE80211_SKB_CB( skb );
struct rtl_tx_desc *pdesc = NULL;
struct rtl_tcb_desc tcb_desc;
struct ieee80211_hdr *hdr = ( struct ieee80211_hdr * )( skb->data );
__le16 fc = hdr->frame_control;
u8 *pda_addr = hdr->addr1;
/* ssn */
u8 *qc = NULL;
u8 tid = 0;
u16 seq_number = 0;
memset( &tcb_desc, 0, sizeof( struct rtl_tcb_desc ) );
if ( ieee80211_is_auth( fc ) ) {
RT_TRACE( rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n" );
rtl_ips_nic_on( hw );
}
if ( rtlpriv->psc.sw_ps_enabled ) {
if ( ieee80211_is_data( fc ) && !ieee80211_is_nullfunc( fc ) &&
!ieee80211_has_pm( fc ) )
hdr->frame_control |= cpu_to_le16( IEEE80211_FCTL_PM );
}
rtl_action_proc( hw, skb, true );
if ( is_multicast_ether_addr( pda_addr ) )
rtlpriv->stats.txbytesmulticast += skb->len;
else if ( is_broadcast_ether_addr( pda_addr ) )
rtlpriv->stats.txbytesbroadcast += skb->len;
else
rtlpriv->stats.txbytesunicast += skb->len;
if ( ieee80211_is_data_qos( fc ) ) {
qc = ieee80211_get_qos_ctl( hdr );
tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
seq_number = ( le16_to_cpu( hdr->seq_ctrl ) &
IEEE80211_SCTL_SEQ ) >> 4;