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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.
*
* 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.
*
*****************************************************************************/
#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, 1000);
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)
{
void *buf;
buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask,
&urb->transfer_dma);
if (!buf) {
pr_err("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);
} 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;
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)) {
pr_err("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) {
pr_err("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) {
pr_err("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_priv *rtlpriv = rtl_priv(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);
cancel_work_sync(&rtlpriv->works.lps_change_work);
flush_workqueue(rtlpriv->works.rtl_wq);
destroy_workqueue(rtlpriv->works.rtl_wq);
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_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)
goto err_out;
err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
if (err < 0) {
pr_err("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;
/* 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));
struct urb *urb;
/* 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);
/* free pre-allocated URBs from rtl_usb_start() */
usb_kill_anchored_urbs(&rtlusb->rx_submitted);
tasklet_kill(&rtlusb->rx_work_tasklet);
cancel_work_sync(&rtlpriv->works.lps_change_work);
flush_workqueue(rtlpriv->works.rtl_wq);
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);
}
rtlpriv->cfg->ops->hw_disable(hw);
}
static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
{
int err;
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;
pr_err("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_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) {
pr_err("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_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
struct urb *_urb;
WARN_ON(NULL == skb);
_urb = usb_alloc_urb(0, GFP_ATOMIC);
if (!_urb) {
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_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))) {
pr_err("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)) {
pr_err("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;
seq_number += 1;
seq_number <<= 4;
}
rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, NULL, info, sta, skb,
hw_queue, &tcb_desc);
if (!ieee80211_has_morefrags(hdr->frame_control)) {
if (qc)
mac->tids[tid].seq_number = seq_number;
}
if (ieee80211_is_data(fc))