/*
* Copyright (c) 2006 Damien Bergamini <damien.bergamini@free.fr>
* Copyright (c) 2006 Sam Leffler, Errno Consulting
* Copyright (c) 2007 Christoph Hellwig <hch@lst.de>
* Copyright (c) 2008-2009 Weongyo Jeong <weongyo@freebsd.org>
* Copyright (c) 2012 Pontus Fuchs <pontus.fuchs@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define AR5523_FLAG_PRE_FIRMWARE (1 << 0)
#define AR5523_FLAG_ABG (1 << 1)
#define AR5523_FIRMWARE_FILE "ar5523.bin"
#define AR5523_CMD_TX_PIPE 0x01
#define AR5523_DATA_TX_PIPE 0x02
#define AR5523_CMD_RX_PIPE 0x81
#define AR5523_DATA_RX_PIPE 0x82
#define ar5523_cmd_tx_pipe(dev) \
usb_sndbulkpipe((dev), AR5523_CMD_TX_PIPE)
#define ar5523_data_tx_pipe(dev) \
usb_sndbulkpipe((dev), AR5523_DATA_TX_PIPE)
#define ar5523_cmd_rx_pipe(dev) \
usb_rcvbulkpipe((dev), AR5523_CMD_RX_PIPE)
#define ar5523_data_rx_pipe(dev) \
usb_rcvbulkpipe((dev), AR5523_DATA_RX_PIPE)
#define AR5523_DATA_TIMEOUT 10000
#define AR5523_CMD_TIMEOUT 1000
#define AR5523_TX_DATA_COUNT 8
#define AR5523_TX_DATA_RESTART_COUNT 2
#define AR5523_RX_DATA_COUNT 16
#define AR5523_RX_DATA_REFILL_COUNT 8
#define AR5523_CMD_ID 1
#define AR5523_DATA_ID 2
#define AR5523_TX_WD_TIMEOUT (HZ * 2)
#define AR5523_FLUSH_TIMEOUT (HZ * 3)
enum AR5523_flags {
AR5523_HW_UP,
AR5523_USB_DISCONNECTED,
AR5523_CONNECTED
};
struct ar5523_tx_cmd {
struct ar5523 *ar;
struct urb *urb_tx;
void *buf_tx;
void *odata;
int olen;
int flags;
int res;
struct completion done;
};
/* This struct is placed in tx_info->driver_data. It must not be larger
* than IEEE80211_TX_INFO_DRIVER_DATA_SIZE.
*/
struct ar5523_tx_data {
struct list_head list;
struct ar5523 *ar;
struct urb *urb;
};
struct ar5523_rx_data {
struct list_head list;
struct ar5523 *ar;
struct urb *urb;
struct sk_buff *skb;
};
struct ar5523 {
struct usb_device *dev;
struct ieee80211_hw *hw;
unsigned long flags;
struct mutex mutex;
struct workqueue_struct *wq;
struct ar5523_tx_cmd tx_cmd;
struct delayed_work stat_work;
struct timer_list tx_wd_timer;
struct work_struct tx_wd_work;
struct work_struct tx_work;
struct list_head tx_queue_pending;
struct list_head tx_queue_submitted;
spinlock_t tx_data_list_lock;
wait_queue_head_t tx_flush_waitq;
/* Queued + Submitted TX frames */
atomic_t tx_nr_total;
/* Submitted TX frames */
atomic_t tx_nr_pending;
void *rx_cmd_buf;
struct urb *rx_cmd_urb;
struct ar5523_rx_data rx_data[AR5523_RX_DATA_COUNT];
spinlock_t rx_data_list_lock;
struct list_head rx_data_free;
struct list_head rx_data_used;
atomic_t rx_data_free_cnt;
struct work_struct rx_refill_work;
unsigned int rxbufsz;
u8 serial[16];
struct ieee80211_channel channels[14];
struct ieee80211_rate rates[12];
struct ieee80211_supported_band band;
struct ieee80211_vif *vif;
};
/* flags for sending firmware commands */
#define AR5523_CMD_FLAG_READ (1 << 1)
#define AR5523_CMD_FLAG_MAGIC (1 << 2)
#define ar5523_dbg(ar, format, arg...) \
dev_dbg(&(ar)->dev->dev, format, ## arg)
/* On USB hot-unplug there can be a lot of URBs in flight and they'll all
* fail. Instead of dealing with them in every possible place just surpress
* any messages on USB disconnect.
*/
#define ar5523_err(ar, format, arg...) \
do { \
if (!test_bit(AR5523_USB_DISCONNECTED, &ar->flags)) { \
dev_err(&(ar)->dev->dev, format, ## arg); \
} \
} while (0)
#define ar5523_info(ar, format, arg...) \
dev_info(&(ar)->dev->dev, format, ## arg)