drivers/net/wireless/ath/ar5523/ar5523.h

   1 /*
   2  * Copyright (c) 2006 Damien Bergamini <damien.bergamini@free.fr>
   3  * Copyright (c) 2006 Sam Leffler, Errno Consulting
   4  * Copyright (c) 2007 Christoph Hellwig <hch@lst.de>
   5  * Copyright (c) 2008-2009 Weongyo Jeong <weongyo@freebsd.org>
   6  * Copyright (c) 2012 Pontus Fuchs <pontus.fuchs@gmail.com>
   7  *
   8  * Permission to use, copy, modify, and/or distribute this software for any
   9  * purpose with or without fee is hereby granted, provided that the above
  10  * copyright notice and this permission notice appear in all copies.
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  13  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  14  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  15  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  16  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  17  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  18  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  19  */
  20
  21 #define AR5523_FLAG_PRE_FIRMWARE        (1 << 0)
  22 #define AR5523_FLAG_ABG                 (1 << 1)
  23
  24 #define AR5523_FIRMWARE_FILE    "ar5523.bin"
  25
  26 #define AR5523_CMD_TX_PIPE      0x01
  27 #define AR5523_DATA_TX_PIPE     0x02
  28 #define AR5523_CMD_RX_PIPE      0x81
  29 #define AR5523_DATA_RX_PIPE     0x82
  30
  31 #define ar5523_cmd_tx_pipe(dev) \
  32         usb_sndbulkpipe((dev), AR5523_CMD_TX_PIPE)
  33 #define ar5523_data_tx_pipe(dev) \
  34         usb_sndbulkpipe((dev), AR5523_DATA_TX_PIPE)
  35 #define ar5523_cmd_rx_pipe(dev) \
  36         usb_rcvbulkpipe((dev), AR5523_CMD_RX_PIPE)
  37 #define ar5523_data_rx_pipe(dev) \
  38         usb_rcvbulkpipe((dev), AR5523_DATA_RX_PIPE)
  39
  40 #define AR5523_DATA_TIMEOUT     10000
  41 #define AR5523_CMD_TIMEOUT      1000
  42
  43 #define AR5523_TX_DATA_COUNT            8
  44 #define AR5523_TX_DATA_RESTART_COUNT    2
  45 #define AR5523_RX_DATA_COUNT            16
  46 #define AR5523_RX_DATA_REFILL_COUNT     8
  47
  48 #define AR5523_CMD_ID   1
  49 #define AR5523_DATA_ID  2
  50
  51 #define AR5523_TX_WD_TIMEOUT    (HZ * 2)
  52 #define AR5523_FLUSH_TIMEOUT    (HZ * 3)
  53
  54 enum AR5523_flags {
  55         AR5523_HW_UP,
  56         AR5523_USB_DISCONNECTED,
  57         AR5523_CONNECTED
  58 };
  59
  60 struct ar5523_tx_cmd {
  61         struct ar5523           *ar;
  62         struct urb              *urb_tx;
  63         void                    *buf_tx;
  64         void                    *odata;
  65         int                     olen;
  66         int                     flags;
  67         int                     res;
  68         struct completion       done;
  69 };
  70
  71 /* This struct is placed in tx_info->driver_data. It must not be larger
  72  *  than IEEE80211_TX_INFO_DRIVER_DATA_SIZE.
  73  */
  74 struct ar5523_tx_data {
  75         struct list_head        list;
  76         struct ar5523           *ar;
  77         struct urb              *urb;
  78 };
  79
  80 struct ar5523_rx_data {
  81         struct  list_head       list;
  82         struct ar5523           *ar;
  83         struct urb              *urb;
  84         struct sk_buff          *skb;
  85 };
  86
  87 struct ar5523 {
  88         struct usb_device       *dev;
  89         struct ieee80211_hw     *hw;
  90
  91         unsigned long           flags;
  92         struct mutex            mutex;
  93         struct workqueue_struct *wq;
  94
  95         struct ar5523_tx_cmd    tx_cmd;
  96
  97         struct delayed_work     stat_work;
  98
  99         struct timer_list       tx_wd_timer;
 100         struct work_struct      tx_wd_work;
 101         struct work_struct      tx_work;
 102         struct list_head        tx_queue_pending;
 103         struct list_head        tx_queue_submitted;
 104         spinlock_t              tx_data_list_lock;
 105         wait_queue_head_t       tx_flush_waitq;
 106
 107         /* Queued + Submitted TX frames */
 108         atomic_t                tx_nr_total;
 109
 110         /* Submitted TX frames */
 111         atomic_t                tx_nr_pending;
 112
 113         void                    *rx_cmd_buf;
 114         struct urb              *rx_cmd_urb;
 115
 116         struct ar5523_rx_data   rx_data[AR5523_RX_DATA_COUNT];
 117         spinlock_t              rx_data_list_lock;
 118         struct list_head        rx_data_free;
 119         struct list_head        rx_data_used;
 120         atomic_t                rx_data_free_cnt;
 121
 122         struct work_struct      rx_refill_work;
 123
 124         unsigned int            rxbufsz;
 125         u8                      serial[16];
 126
 127         struct ieee80211_channel channels[14];
 128         struct ieee80211_rate   rates[12];
 129         struct ieee80211_supported_band band;
 130         struct ieee80211_vif    *vif;
 131 };
 132
 133 /* flags for sending firmware commands */
 134 #define AR5523_CMD_FLAG_READ    (1 << 1)
 135 #define AR5523_CMD_FLAG_MAGIC   (1 << 2)
 136
 137 #define ar5523_dbg(ar, format, arg...) \
 138         dev_dbg(&(ar)->dev->dev, format, ## arg)
 139
 140 /* On USB hot-unplug there can be a lot of URBs in flight and they'll all
 141  * fail. Instead of dealing with them in every possible place just surpress
 142  * any messages on USB disconnect.
 143  */
 144 #define ar5523_err(ar, format, arg...) \
 145 do { \
 146         if (!test_bit(AR5523_USB_DISCONNECTED, &ar->flags)) { \
 147                 dev_err(&(ar)->dev->dev, format, ## arg); \
 148         } \
 149 } while (0)
 150 #define ar5523_info(ar, format, arg...) \
 151         dev_info(&(ar)->dev->dev, format, ## arg)