--- /dev/null
+/******************************************************************************
+ *
+ * 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.
+ *
+ *****************************************************************************/
+
+#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)
+{
+ 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_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_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;
+
+ /* 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);
+ 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;
+ 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))
+ rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
+}
+
+static int rtl_usb_tx(struct ieee80211_hw *hw,
+ struct ieee80211_sta *sta,
+ struct sk_buff *skb,
+ struct rtl_tcb_desc *dummy)
+{
+ struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
+ struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
+ __le16 fc = hdr->frame_control;
+ u16 hw_queue;
+
+ if (unlikely(is_hal_stop(rtlhal)))
+ goto err_free;
+ hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
+ _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue);
+ _rtl_usb_transmit(hw, skb, hw_queue);
+ return NETDEV_TX_OK;
+
+err_free:
+ dev_kfree_skb_any(skb);
+ return NETDEV_TX_OK;
+}
+
+static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
+ struct ieee80211_sta *sta,
+ struct sk_buff *skb)
+{
+ return false;
+}
+
+static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work)
+{
+ struct rtl_works *rtlworks =
+ container_of(work, struct rtl_works, fill_h2c_cmd);
+ struct ieee80211_hw *hw = rtlworks->hw;
+ struct rtl_priv *rtlpriv = rtl_priv(hw);
+
+ rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask);
+}
+
+static struct rtl_intf_ops rtl_usb_ops = {
+ .adapter_start = rtl_usb_start,
+ .adapter_stop = rtl_usb_stop,
+ .adapter_tx = rtl_usb_tx,
+ .waitq_insert = rtl_usb_tx_chk_waitq_insert,
+};
+
+int rtl_usb_probe(struct usb_interface *intf,
+ const struct usb_device_id *id,
+ struct rtl_hal_cfg *rtl_hal_cfg)
+{
+ int err;
+ struct ieee80211_hw *hw = NULL;
+ struct rtl_priv *rtlpriv = NULL;
+ struct usb_device *udev;
+ struct rtl_usb_priv *usb_priv;
+
+ hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
+ sizeof(struct rtl_usb_priv), &rtl_ops);
+ if (!hw) {
+ RT_ASSERT(false, "ieee80211 alloc failed\n");
+ return -ENOMEM;
+ }
+ rtlpriv = hw->priv;
+ rtlpriv->usb_data = kzalloc(RTL_USB_MAX_RX_COUNT * sizeof(u32),
+ GFP_KERNEL);
+ if (!rtlpriv->usb_data)
+ return -ENOMEM;
+
+ /* this spin lock must be initialized early */
+ spin_lock_init(&rtlpriv->locks.usb_lock);
+ INIT_WORK(&rtlpriv->works.fill_h2c_cmd,
+ rtl_fill_h2c_cmd_work_callback);
+ INIT_WORK(&rtlpriv->works.lps_change_work,
+ rtl_lps_change_work_callback);
+
+ rtlpriv->usb_data_index = 0;
+ init_completion(&rtlpriv->firmware_loading_complete);
+ SET_IEEE80211_DEV(hw, &intf->dev);
+ udev = interface_to_usbdev(intf);
+ usb_get_dev(udev);
+ usb_priv = rtl_usbpriv(hw);
+ memset(usb_priv, 0, sizeof(*usb_priv));
+ usb_priv->dev.intf = intf;
+ usb_priv->dev.udev = udev;
+ usb_set_intfdata(intf, hw);
+ /* init cfg & intf_ops */
+ rtlpriv->rtlhal.interface = INTF_USB;
+ rtlpriv->cfg = rtl_hal_cfg;
+ rtlpriv->intf_ops = &rtl_usb_ops;
+ rtl_dbgp_flag_init(hw);
+ /* Init IO handler */
+ _rtl_usb_io_handler_init(&udev->dev, hw);
+ rtlpriv->cfg->ops->read_chip_version(hw);
+ /*like read eeprom and so on */
+ rtlpriv->cfg->ops->read_eeprom_info(hw);
+ err = _rtl_usb_init(hw);
+ if (err)
+ goto error_out;
+ rtl_usb_init_sw(hw);
+ /* Init mac80211 sw */
+ err = rtl_init_core(hw);
+ if (err) {
+ RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
+ "Can't allocate sw for mac80211\n");
+ goto error_out;
+ }
+ if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
+ RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, "Can't init_sw_vars\n");
+ goto error_out;
+ }
+ rtlpriv->cfg->ops->init_sw_leds(hw);
+
+ err = ieee80211_register_hw(hw);
+ if (err) {
+ RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
+ "Can't register mac80211 hw.\n");
+ err = -ENODEV;
+ goto error_out;
+ }
+ rtlpriv->mac80211.mac80211_registered = 1;
+
+ set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
+ return 0;
+
+error_out:
+ rtl_deinit_core(hw);
+ _rtl_usb_io_handler_release(hw);
+ usb_put_dev(udev);
+ complete(&rtlpriv->firmware_loading_complete);
+ return -ENODEV;
+}
+EXPORT_SYMBOL(rtl_usb_probe);
+
+void rtl_usb_disconnect(struct usb_interface *intf)
+{
+ struct ieee80211_hw *hw = usb_get_intfdata(intf);
+ struct rtl_priv *rtlpriv = rtl_priv(hw);
+ struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
+ struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
+
+ if (unlikely(!rtlpriv))
+ return;
+ /* just in case driver is removed before firmware callback */
+ wait_for_completion(&rtlpriv->firmware_loading_complete);
+ clear_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);
+ /*ieee80211_unregister_hw will call ops_stop */
+ if (rtlmac->mac80211_registered == 1) {
+ ieee80211_unregister_hw(hw);
+ rtlmac->mac80211_registered = 0;
+ } else {
+ rtl_deinit_deferred_work(hw);
+ rtlpriv->intf_ops->adapter_stop(hw);
+ }
+ /*deinit rfkill */
+ /* rtl_deinit_rfkill(hw); */
+ rtl_usb_deinit(hw);
+ rtl_deinit_core(hw);
+ kfree(rtlpriv->usb_data);
+ rtlpriv->cfg->ops->deinit_sw_leds(hw);
+ rtlpriv->cfg->ops->deinit_sw_vars(hw);
+ _rtl_usb_io_handler_release(hw);
+ usb_put_dev(rtlusb->udev);
+ usb_set_intfdata(intf, NULL);
+ ieee80211_free_hw(hw);
+}
+EXPORT_SYMBOL(rtl_usb_disconnect);
+
+int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
+{
+ return 0;
+}
+EXPORT_SYMBOL(rtl_usb_suspend);
+
+int rtl_usb_resume(struct usb_interface *pusb_intf)
+{
+ return 0;
+}
+EXPORT_SYMBOL(rtl_usb_resume);
Code Review / kvmfornfv.git / blobdiff