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linux/drivers/net/wireless/ath/ar5523/ar5523.c

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/*
* 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.
*/
/*
* This driver is based on the uath driver written by Damien Bergamini for
* OpenBSD, who did black-box analysis of the Windows binary driver to find
* out how the hardware works. It contains a lot magic numbers because of
* that and only has minimal functionality.
*/
#include <linux/compiler.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/list.h>
#include <linux/completion.h>
#include <linux/firmware.h>
#include <linux/skbuff.h>
#include <linux/usb.h>
#include <net/mac80211.h>
#include "ar5523.h"
#include "ar5523_hw.h"
/*
* Various supported device vendors/products.
* UB51: AR5005UG 802.11b/g, UB52: AR5005UX 802.11a/b/g
*/
static int ar5523_submit_rx_cmd(struct ar5523 *ar);
static void ar5523_data_tx_pkt_put(struct ar5523 *ar);
static void ar5523_read_reply(struct ar5523 *ar, struct ar5523_cmd_hdr *hdr,
struct ar5523_tx_cmd *cmd)
{
int dlen, olen;
__be32 *rp;
dlen = be32_to_cpu(hdr->len) - sizeof(*hdr);
if (dlen < 0) {
WARN_ON(1);
goto out;
}
ar5523_dbg(ar, "Code = %d len = %d\n", be32_to_cpu(hdr->code) & 0xff,
dlen);
rp = (__be32 *)(hdr + 1);
if (dlen >= sizeof(u32)) {
olen = be32_to_cpu(rp[0]);
dlen -= sizeof(u32);
if (olen == 0) {
/* convention is 0 =>'s one word */
olen = sizeof(u32);
}
} else
olen = 0;
if (cmd->odata) {
if (cmd->olen < olen) {
ar5523_err(ar, "olen to small %d < %d\n",
cmd->olen, olen);
cmd->olen = 0;
cmd->res = -EOVERFLOW;
} else {
cmd->olen = olen;
memcpy(cmd->odata, &rp[1], olen);
cmd->res = 0;
}
}
out:
complete(&cmd->done);
}
static void ar5523_cmd_rx_cb(struct urb *urb)
{
struct ar5523 *ar = urb->context;
struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
struct ar5523_cmd_hdr *hdr = ar->rx_cmd_buf;
int dlen;
u32 code, hdrlen;
if (urb->status) {
if (urb->status != -ESHUTDOWN)
ar5523_err(ar, "RX USB error %d.\n", urb->status);
goto skip;
}
if (urb->actual_length < sizeof(struct ar5523_cmd_hdr)) {
ar5523_err(ar, "RX USB to short.\n");
goto skip;
}
ar5523_dbg(ar, "%s code %02x priv %d\n", __func__,
be32_to_cpu(hdr->code) & 0xff, hdr->priv);
code = be32_to_cpu(hdr->code);
hdrlen = be32_to_cpu(hdr->len);
switch (code & 0xff) {
default:
/* reply to a read command */
if (hdr->priv != AR5523_CMD_ID) {
ar5523_err(ar, "Unexpected command id: %02x\n",
code & 0xff);
goto skip;
}
ar5523_read_reply(ar, hdr, cmd);
break;
case WDCMSG_DEVICE_AVAIL:
ar5523_dbg(ar, "WDCMSG_DEVICE_AVAIL\n");
cmd->res = 0;
cmd->olen = 0;
complete(&cmd->done);
break;
case WDCMSG_SEND_COMPLETE:
ar5523_dbg(ar, "WDCMSG_SEND_COMPLETE: %d pending\n",
atomic_read(&ar->tx_nr_pending));
if (!test_bit(AR5523_HW_UP, &ar->flags))
ar5523_dbg(ar, "Unexpected WDCMSG_SEND_COMPLETE\n");
else {
mod_timer(&ar->tx_wd_timer,
jiffies + AR5523_TX_WD_TIMEOUT);
ar5523_data_tx_pkt_put(ar);
}
break;
case WDCMSG_TARGET_START:
/* This command returns a bogus id so it needs special
handling */
dlen = hdrlen - sizeof(*hdr);
if (dlen != (int)sizeof(u32)) {
ar5523_err(ar, "Invalid reply to WDCMSG_TARGET_START");
return;
}
memcpy(cmd->odata, hdr + 1, sizeof(u32));
cmd->olen = sizeof(u32);
cmd->res = 0;
complete(&cmd->done);
break;
case WDCMSG_STATS_UPDATE:
ar5523_dbg(ar, "WDCMSG_STATS_UPDATE\n");
break;
}
skip:
ar5523_submit_rx_cmd(ar);
}
static int ar5523_alloc_rx_cmd(struct ar5523 *ar)
{
ar->rx_cmd_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!ar->rx_cmd_urb)
return -ENOMEM;
ar->rx_cmd_buf = usb_alloc_coherent(ar->dev, AR5523_MAX_RXCMDSZ,
GFP_KERNEL,
&ar->rx_cmd_urb->transfer_dma);
if (!ar->rx_cmd_buf) {
usb_free_urb(ar->rx_cmd_urb);
return -ENOMEM;
}
return 0;
}
static void ar5523_cancel_rx_cmd(struct ar5523 *ar)
{
usb_kill_urb(ar->rx_cmd_urb);
}
static void ar5523_free_rx_cmd(struct ar5523 *ar)
{
usb_free_coherent(ar->dev, AR5523_MAX_RXCMDSZ,
ar->rx_cmd_buf, ar->rx_cmd_urb->transfer_dma);
usb_free_urb(ar->rx_cmd_urb);
}
static int ar5523_submit_rx_cmd(struct ar5523 *ar)
{
int error;
usb_fill_bulk_urb(ar->rx_cmd_urb, ar->dev,
ar5523_cmd_rx_pipe(ar->dev), ar->rx_cmd_buf,
AR5523_MAX_RXCMDSZ, ar5523_cmd_rx_cb, ar);
ar->rx_cmd_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
error = usb_submit_urb(ar->rx_cmd_urb, GFP_ATOMIC);
if (error) {
if (error != -ENODEV)
ar5523_err(ar, "error %d when submitting rx urb\n",
error);
return error;
}
return 0;
}
/*
* Command submitted cb
*/
static void ar5523_cmd_tx_cb(struct urb *urb)
{
struct ar5523_tx_cmd *cmd = urb->context;
struct ar5523 *ar = cmd->ar;
if (urb->status) {
ar5523_err(ar, "Failed to TX command. Status = %d\n",
urb->status);
cmd->res = urb->status;
complete(&cmd->done);
return;
}
if (!(cmd->flags & AR5523_CMD_FLAG_READ)) {
cmd->res = 0;
complete(&cmd->done);
}
}
static int ar5523_cmd(struct ar5523 *ar, u32 code, const void *idata,
int ilen, void *odata, int olen, int flags)
{
struct ar5523_cmd_hdr *hdr;
struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
int xferlen, error;
/* always bulk-out a multiple of 4 bytes */
xferlen = (sizeof(struct ar5523_cmd_hdr) + ilen + 3) & ~3;
hdr = (struct ar5523_cmd_hdr *)cmd->buf_tx;
memset(hdr, 0, sizeof(struct ar5523_cmd_hdr));
hdr->len = cpu_to_be32(xferlen);
hdr->code = cpu_to_be32(code);
hdr->priv = AR5523_CMD_ID;
if (flags & AR5523_CMD_FLAG_MAGIC)
hdr->magic = cpu_to_be32(1 << 24);
memcpy(hdr + 1, idata, ilen);
cmd->odata = odata;
cmd->olen = olen;
cmd->flags = flags;
ar5523_dbg(ar, "do cmd %02x\n", code);
usb_fill_bulk_urb(cmd->urb_tx, ar->dev, ar5523_cmd_tx_pipe(ar->dev),
cmd->buf_tx, xferlen, ar5523_cmd_tx_cb, cmd);
cmd->urb_tx->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
error = usb_submit_urb(cmd->urb_tx, GFP_KERNEL);
if (error) {
ar5523_err(ar, "could not send command 0x%x, error=%d\n",
code, error);
return error;
}
if (!wait_for_completion_timeout(&cmd->done, 2 * HZ)) {
cmd->odata = NULL;
ar5523_err(ar, "timeout waiting for command %02x reply\n",
code);
cmd->res = -ETIMEDOUT;
}
return cmd->res;
}
static int ar5523_cmd_write(struct ar5523 *ar, u32 code, const void *data,
int len, int flags)
{
flags &= ~AR5523_CMD_FLAG_READ;
return ar5523_cmd(ar, code, data, len, NULL, 0, flags);
}
static int ar5523_cmd_read(struct ar5523 *ar, u32 code, const void *idata,
int ilen, void *odata, int olen, int flags)
{
flags |= AR5523_CMD_FLAG_READ;
return ar5523_cmd(ar, code, idata, ilen, odata, olen, flags);
}
static int ar5523_config(struct ar5523 *ar, u32 reg, u32 val)
{
struct ar5523_write_mac write;
int error;
write.reg = cpu_to_be32(reg);
write.len = cpu_to_be32(0); /* 0 = single write */
*(__be32 *)write.data = cpu_to_be32(val);
error = ar5523_cmd_write(ar, WDCMSG_TARGET_SET_CONFIG, &write,
3 * sizeof(u32), 0);
if (error != 0)
ar5523_err(ar, "could not write register 0x%02x\n", reg);
return error;
}
static int ar5523_config_multi(struct ar5523 *ar, u32 reg, const void *data,
int len)
{
struct ar5523_write_mac write;
int error;
write.reg = cpu_to_be32(reg);
write.len = cpu_to_be32(len);
memcpy(write.data, data, len);
/* properly handle the case where len is zero (reset) */
error = ar5523_cmd_write(ar, WDCMSG_TARGET_SET_CONFIG, &write,
(len == 0) ? sizeof(u32) : 2 * sizeof(u32) + len, 0);
if (error != 0)
ar5523_err(ar, "could not write %d bytes to register 0x%02x\n",
len, reg);
return error;
}
static int ar5523_get_status(struct ar5523 *ar, u32 which, void *odata,
int olen)
{
int error;
__be32 which_be;
which_be = cpu_to_be32(which);
error = ar5523_cmd_read(ar, WDCMSG_TARGET_GET_STATUS,
&which_be, sizeof(which_be), odata, olen, AR5523_CMD_FLAG_MAGIC);
if (error != 0)
ar5523_err(ar, "could not read EEPROM offset 0x%02x\n", which);
return error;
}
static int ar5523_get_capability(struct ar5523 *ar, u32 cap, u32 *val)
{
int error;
__be32 cap_be, val_be;
cap_be = cpu_to_be32(cap);
error = ar5523_cmd_read(ar, WDCMSG_TARGET_GET_CAPABILITY, &cap_be,
sizeof(cap_be), &val_be, sizeof(__be32),
AR5523_CMD_FLAG_MAGIC);
if (error != 0) {
ar5523_err(ar, "could not read capability %u\n", cap);
return error;
}
*val = be32_to_cpu(val_be);
return error;
}
static int ar5523_get_devcap(struct ar5523 *ar)
{
#define GETCAP(x) do { \
error = ar5523_get_capability(ar, x, &cap); \
if (error != 0) \
return error; \
ar5523_info(ar, "Cap: " \
"%s=0x%08x\n", #x, cap); \
} while (0)
int error;
u32 cap;
/* collect device capabilities */
GETCAP(CAP_TARGET_VERSION);
GETCAP(CAP_TARGET_REVISION);
GETCAP(CAP_MAC_VERSION);
GETCAP(CAP_MAC_REVISION);
GETCAP(CAP_PHY_REVISION);
GETCAP(CAP_ANALOG_5GHz_REVISION);
GETCAP(CAP_ANALOG_2GHz_REVISION);
GETCAP(CAP_REG_DOMAIN);
GETCAP(CAP_REG_CAP_BITS);
GETCAP(CAP_WIRELESS_MODES);
GETCAP(CAP_CHAN_SPREAD_SUPPORT);
GETCAP(CAP_COMPRESS_SUPPORT);
GETCAP(CAP_BURST_SUPPORT);
GETCAP(CAP_FAST_FRAMES_SUPPORT);
GETCAP(CAP_CHAP_TUNING_SUPPORT);
GETCAP(CAP_TURBOG_SUPPORT);
GETCAP(CAP_TURBO_PRIME_SUPPORT);
GETCAP(CAP_DEVICE_TYPE);
GETCAP(CAP_WME_SUPPORT);
GETCAP(CAP_TOTAL_QUEUES);
GETCAP(CAP_CONNECTION_ID_MAX);
GETCAP(CAP_LOW_5GHZ_CHAN);
GETCAP(CAP_HIGH_5GHZ_CHAN);
GETCAP(CAP_LOW_2GHZ_CHAN);
GETCAP(CAP_HIGH_2GHZ_CHAN);
GETCAP(CAP_TWICE_ANTENNAGAIN_5G);
GETCAP(CAP_TWICE_ANTENNAGAIN_2G);
GETCAP(CAP_CIPHER_AES_CCM);
GETCAP(CAP_CIPHER_TKIP);
GETCAP(CAP_MIC_TKIP);
return 0;
}
static int ar5523_set_ledsteady(struct ar5523 *ar, int lednum, int ledmode)
{
struct ar5523_cmd_ledsteady led;
led.lednum = cpu_to_be32(lednum);
led.ledmode = cpu_to_be32(ledmode);
ar5523_dbg(ar, "set %s led %s (steady)\n",
(lednum == UATH_LED_LINK) ? "link" : "activity",
ledmode ? "on" : "off");
return ar5523_cmd_write(ar, WDCMSG_SET_LED_STEADY, &led, sizeof(led),
0);
}
static int ar5523_set_rxfilter(struct ar5523 *ar, u32 bits, u32 op)
{
struct ar5523_cmd_rx_filter rxfilter;
rxfilter.bits = cpu_to_be32(bits);
rxfilter.op = cpu_to_be32(op);
ar5523_dbg(ar, "setting Rx filter=0x%x flags=0x%x\n", bits, op);
return ar5523_cmd_write(ar, WDCMSG_RX_FILTER, &rxfilter,
sizeof(rxfilter), 0);
}
static int ar5523_reset_tx_queues(struct ar5523 *ar)
{
__be32 qid = cpu_to_be32(0);
ar5523_dbg(ar, "resetting Tx queue\n");
return ar5523_cmd_write(ar, WDCMSG_RELEASE_TX_QUEUE,
&qid, sizeof(qid), 0);
}
static int ar5523_set_chan(struct ar5523 *ar)
{
struct ieee80211_conf *conf = &ar->hw->conf;
struct ar5523_cmd_reset reset;
memset(&reset, 0, sizeof(reset));
reset.flags |= cpu_to_be32(UATH_CHAN_2GHZ);
reset.flags |= cpu_to_be32(UATH_CHAN_OFDM);
reset.freq = cpu_to_be32(conf->chandef.chan->center_freq);
reset.maxrdpower = cpu_to_be32(50); /* XXX */
reset.channelchange = cpu_to_be32(1);
reset.keeprccontent = cpu_to_be32(0);
ar5523_dbg(ar, "set chan flags 0x%x freq %d\n",
be32_to_cpu(reset.flags),
conf->chandef.chan->center_freq);
return ar5523_cmd_write(ar, WDCMSG_RESET, &reset, sizeof(reset), 0);
}
static int ar5523_queue_init(struct ar5523 *ar)
{
struct ar5523_cmd_txq_setup qinfo;
ar5523_dbg(ar, "setting up Tx queue\n");
qinfo.qid = cpu_to_be32(0);
qinfo.len = cpu_to_be32(sizeof(qinfo.attr));
qinfo.attr.priority = cpu_to_be32(0); /* XXX */
qinfo.attr.aifs = cpu_to_be32(3);
qinfo.attr.logcwmin = cpu_to_be32(4);
qinfo.attr.logcwmax = cpu_to_be32(10);
qinfo.attr.bursttime = cpu_to_be32(0);
qinfo.attr.mode = cpu_to_be32(0);
qinfo.attr.qflags = cpu_to_be32(1); /* XXX? */
return ar5523_cmd_write(ar, WDCMSG_SETUP_TX_QUEUE, &qinfo,
sizeof(qinfo), 0);
}
static int ar5523_switch_chan(struct ar5523 *ar)
{
int error;
error = ar5523_set_chan(ar);
if (error) {
ar5523_err(ar, "could not set chan, error %d\n", error);
goto out_err;
}
/* reset Tx rings */
error = ar5523_reset_tx_queues(ar);
if (error) {
ar5523_err(ar, "could not reset Tx queues, error %d\n",
error);
goto out_err;
}
/* set Tx rings WME properties */
error = ar5523_queue_init(ar);
if (error)
ar5523_err(ar, "could not init wme, error %d\n", error);
out_err:
return error;
}
static void ar5523_rx_data_put(struct ar5523 *ar,
struct ar5523_rx_data *data)
{
unsigned long flags;
spin_lock_irqsave(&ar->rx_data_list_lock, flags);
list_move(&data->list, &ar->rx_data_free);
spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
}
static void ar5523_data_rx_cb(struct urb *urb)
{
struct ar5523_rx_data *data = urb->context;
struct ar5523 *ar = data->ar;
struct ar5523_rx_desc *desc;
struct ar5523_chunk *chunk;
struct ieee80211_hw *hw = ar->hw;
struct ieee80211_rx_status *rx_status;
u32 rxlen;
int usblen = urb->actual_length;
int hdrlen, pad;
ar5523_dbg(ar, "%s\n", __func__);
/* sync/async unlink faults aren't errors */
if (urb->status) {
if (urb->status != -ESHUTDOWN)
ar5523_err(ar, "%s: USB err: %d\n", __func__,
urb->status);
goto skip;
}
if (usblen < AR5523_MIN_RXBUFSZ) {
ar5523_err(ar, "RX: wrong xfer size (usblen=%d)\n", usblen);
goto skip;
}
chunk = (struct ar5523_chunk *) data->skb->data;
if (((chunk->flags & UATH_CFLAGS_FINAL) == 0) ||
chunk->seqnum != 0) {
ar5523_dbg(ar, "RX: No final flag. s: %d f: %02x l: %d\n",
chunk->seqnum, chunk->flags,
be16_to_cpu(chunk->length));
goto skip;
}
/* Rx descriptor is located at the end, 32-bit aligned */
desc = (struct ar5523_rx_desc *)
(data->skb->data + usblen - sizeof(struct ar5523_rx_desc));
rxlen = be32_to_cpu(desc->len);
if (rxlen > ar->rxbufsz) {
ar5523_dbg(ar, "RX: Bad descriptor (len=%d)\n",
be32_to_cpu(desc->len));
goto skip;
}
if (!rxlen) {
ar5523_dbg(ar, "RX: rxlen is 0\n");
goto skip;
}
if (be32_to_cpu(desc->status) != 0) {
ar5523_dbg(ar, "Bad RX status (0x%x len = %d). Skip\n",
be32_to_cpu(desc->status), be32_to_cpu(desc->len));
goto skip;
}
skb_reserve(data->skb, sizeof(*chunk));
skb_put(data->skb, rxlen - sizeof(struct ar5523_rx_desc));
hdrlen = ieee80211_get_hdrlen_from_skb(data->skb);
if (!IS_ALIGNED(hdrlen, 4)) {
ar5523_dbg(ar, "eek, alignment workaround activated\n");
pad = ALIGN(hdrlen, 4) - hdrlen;
memmove(data->skb->data + pad, data->skb->data, hdrlen);
skb_pull(data->skb, pad);
skb_put(data->skb, pad);
}
rx_status = IEEE80211_SKB_RXCB(data->skb);
memset(rx_status, 0, sizeof(*rx_status));
rx_status->freq = be32_to_cpu(desc->channel);
rx_status->band = hw->conf.chandef.chan->band;
rx_status->signal = -95 + be32_to_cpu(desc->rssi);
ieee80211_rx_irqsafe(hw, data->skb);
data->skb = NULL;
skip:
if (data->skb) {
dev_kfree_skb_irq(data->skb);
data->skb = NULL;
}
ar5523_rx_data_put(ar, data);
if (atomic_inc_return(&ar->rx_data_free_cnt) >=
AR5523_RX_DATA_REFILL_COUNT &&
test_bit(AR5523_HW_UP, &ar->flags))
queue_work(ar->wq, &ar->rx_refill_work);
}
static void ar5523_rx_refill_work(struct work_struct *work)
{
struct ar5523 *ar = container_of(work, struct ar5523, rx_refill_work);
struct ar5523_rx_data *data;
unsigned long flags;
int error;
ar5523_dbg(ar, "%s\n", __func__);
do {
spin_lock_irqsave(&ar->rx_data_list_lock, flags);
if (!list_empty(&ar->rx_data_free))
data = (struct ar5523_rx_data *) ar->rx_data_free.next;
else
data = NULL;
spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
if (!data)
goto done;
data->skb = alloc_skb(ar->rxbufsz, GFP_KERNEL);
if (!data->skb) {
ar5523_err(ar, "could not allocate rx skbuff\n");
return;
}
usb_fill_bulk_urb(data->urb, ar->dev,
ar5523_data_rx_pipe(ar->dev), data->skb->data,
ar->rxbufsz, ar5523_data_rx_cb, data);
spin_lock_irqsave(&ar->rx_data_list_lock, flags);
list_move(&data->list, &ar->rx_data_used);
spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
atomic_dec(&ar->rx_data_free_cnt);
error = usb_submit_urb(data->urb, GFP_KERNEL);
if (error) {
kfree_skb(data->skb);
if (error != -ENODEV)
ar5523_err(ar, "Err sending rx data urb %d\n",
error);
ar5523_rx_data_put(ar, data);
atomic_inc(&ar->rx_data_free_cnt);
return;
}
} while (true);
done:
return;
}
static void ar5523_cancel_rx_bufs(struct ar5523 *ar)
{
struct ar5523_rx_data *data;
unsigned long flags;
do {
spin_lock_irqsave(&ar->rx_data_list_lock, flags);
if (!list_empty(&ar->rx_data_used))
data = (struct ar5523_rx_data *) ar->rx_data_used.next;
else
data = NULL;
spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
if (!data)
break;
usb_kill_urb(data->urb);
list_move(&data->list, &ar->rx_data_free);
atomic_inc(&ar->rx_data_free_cnt);
} while (data);
}
static void ar5523_free_rx_bufs(struct ar5523 *ar)
{
struct ar5523_rx_data *data;
ar5523_cancel_rx_bufs(ar);
while (!list_empty(&ar->rx_data_free)) {
data = (struct ar5523_rx_data *) ar->rx_data_free.next;
list_del(&data->list);
usb_free_urb(data->urb);
}
}
static int ar5523_alloc_rx_bufs(struct ar5523 *ar)
{
int i;
for (i = 0; i < AR5523_RX_DATA_COUNT; i++) {
struct ar5523_rx_data *data = &ar->rx_data[i];
data->ar = ar;
data->urb = usb_alloc_urb(0, GFP_KERNEL);
if (!data->urb)
goto err;
list_add_tail(&data->list, &ar->rx_data_free);
atomic_inc(&ar->rx_data_free_cnt);
}
return 0;
err:
ar5523_free_rx_bufs(ar);
return -ENOMEM;
}
static void ar5523_data_tx_pkt_put(struct ar5523 *ar)
{
atomic_dec(&ar->tx_nr_total);
if (!atomic_dec_return(&ar->tx_nr_pending)) {
del_timer(&ar->tx_wd_timer);
wake_up(&ar->tx_flush_waitq);
}
if (atomic_read(&ar->tx_nr_total) < AR5523_TX_DATA_RESTART_COUNT) {
ar5523_dbg(ar, "restart tx queue\n");
ieee80211_wake_queues(ar->hw);
}
}
static void ar5523_data_tx_cb(struct urb *urb)
{
struct sk_buff *skb = urb->context;
struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
struct ar5523_tx_data *data = (struct ar5523_tx_data *)
txi->driver_data;
struct ar5523 *ar = data->ar;
unsigned long flags;
ar5523_dbg(ar, "data tx urb completed: %d\n", urb->status);
spin_lock_irqsave(&ar->tx_data_list_lock, flags);
list_del(&data->list);
spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
if (urb->status) {
ar5523_dbg(ar, "%s: urb status: %d\n", __func__, urb->status);
ar5523_data_tx_pkt_put(ar);
ieee80211_free_txskb(ar->hw, skb);
} else {
skb_pull(skb, sizeof(struct ar5523_tx_desc) + sizeof(__be32));
ieee80211_tx_status_irqsafe(ar->hw, skb);
}
usb_free_urb(urb);
}
static void ar5523_tx(struct ieee80211_hw *hw,
struct ieee80211_tx_control *control,
struct sk_buff *skb)
{
struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
struct ar5523_tx_data *data = (struct ar5523_tx_data *)
txi->driver_data;
struct ar5523 *ar = hw->priv;
unsigned long flags;
ar5523_dbg(ar, "tx called\n");
if (atomic_inc_return(&ar->tx_nr_total) >= AR5523_TX_DATA_COUNT) {
ar5523_dbg(ar, "tx queue full\n");
ar5523_dbg(ar, "stop queues (tot %d pend %d)\n",
atomic_read(&ar->tx_nr_total),
atomic_read(&ar->tx_nr_pending));
ieee80211_stop_queues(hw);
}
spin_lock_irqsave(&ar->tx_data_list_lock, flags);
list_add_tail(&data->list, &ar->tx_queue_pending);
spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
ieee80211_queue_work(ar->hw, &ar->tx_work);
}
static void ar5523_tx_work_locked(struct ar5523 *ar)
{
struct ar5523_tx_data *data;
struct ar5523_tx_desc *desc;
struct ar5523_chunk *chunk;
struct ieee80211_tx_info *txi;
struct urb *urb;
struct sk_buff *skb;
int error = 0, paylen;
u32 txqid;
unsigned long flags;
BUILD_BUG_ON(sizeof(struct ar5523_tx_data) >
IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
ar5523_dbg(ar, "%s\n", __func__);
do {
spin_lock_irqsave(&ar->tx_data_list_lock, flags);
if (!list_empty(&ar->tx_queue_pending)) {
data = (struct ar5523_tx_data *)
ar->tx_queue_pending.next;
list_del(&data->list);
} else
data = NULL;
spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
if (!data)
break;
txi = container_of((void *)data, struct ieee80211_tx_info,
driver_data);
txqid = 0;
skb = container_of((void *)txi, struct sk_buff, cb);
paylen = skb->len;
urb = usb_alloc_urb(0, GFP_KERNEL);
if (!urb) {
ieee80211_free_txskb(ar->hw, skb);
continue;
}
data->ar = ar;
data->urb = urb;
desc = skb_push(skb, sizeof(*desc));
chunk = skb_push(skb, sizeof(*chunk));
chunk->seqnum = 0;
chunk->flags = UATH_CFLAGS_FINAL;
chunk->length = cpu_to_be16(skb->len);
desc->msglen = cpu_to_be32(skb->len);
desc->msgid = AR5523_DATA_ID;
desc->buflen = cpu_to_be32(paylen);
desc->type = cpu_to_be32(WDCMSG_SEND);
desc->flags = cpu_to_be32(UATH_TX_NOTIFY);
if (test_bit(AR5523_CONNECTED, &ar->flags))
desc->connid = cpu_to_be32(AR5523_ID_BSS);
else
desc->connid = cpu_to_be32(AR5523_ID_BROADCAST);
if (txi->flags & IEEE80211_TX_CTL_USE_MINRATE)
txqid |= UATH_TXQID_MINRATE;
desc->txqid = cpu_to_be32(txqid);
urb->transfer_flags = URB_ZERO_PACKET;
usb_fill_bulk_urb(urb, ar->dev, ar5523_data_tx_pipe(ar->dev),
skb->data, skb->len, ar5523_data_tx_cb, skb);
spin_lock_irqsave(&ar->tx_data_list_lock, flags);
list_add_tail(&data->list, &ar->tx_queue_submitted);
spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
mod_timer(&ar->tx_wd_timer, jiffies + AR5523_TX_WD_TIMEOUT);
atomic_inc(&ar->tx_nr_pending);
ar5523_dbg(ar, "TX Frame (%d pending)\n",
atomic_read(&ar->tx_nr_pending));
error = usb_submit_urb(urb, GFP_KERNEL);
if (error) {
ar5523_err(ar, "error %d when submitting tx urb\n",
error);
spin_lock_irqsave(&ar->tx_data_list_lock, flags);
list_del(&data->list);
spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
atomic_dec(&ar->tx_nr_pending);
ar5523_data_tx_pkt_put(ar);
usb_free_urb(urb);
ieee80211_free_txskb(ar->hw, skb);
}
} while (true);
}
static void ar5523_tx_work(struct work_struct *work)
{
struct ar5523 *ar = container_of(work, struct ar5523, tx_work);
ar5523_dbg(ar, "%s\n", __func__);
mutex_lock(&ar->mutex);
ar5523_tx_work_locked(ar);
mutex_unlock(&ar->mutex);
}
static void ar5523_tx_wd_timer(struct timer_list *t)
{
struct ar5523 *ar = from_timer(ar, t, tx_wd_timer);
ar5523_dbg(ar, "TX watchdog timer triggered\n");
ieee80211_queue_work(ar->hw, &ar->tx_wd_work);
}
static void ar5523_tx_wd_work(struct work_struct *work)
{
struct ar5523 *ar = container_of(work, struct ar5523, tx_wd_work);
/* Occasionally the TX queues stop responding. The only way to
* recover seems to be to reset the dongle.
*/
mutex_lock(&ar->mutex);
ar5523_err(ar, "TX queue stuck (tot %d pend %d)\n",
atomic_read(&ar->tx_nr_total),
atomic_read(&ar->tx_nr_pending));
ar5523_err(ar, "Will restart dongle.\n");
ar5523_cmd_write(ar, WDCMSG_TARGET_RESET, NULL, 0, 0);
mutex_unlock(&ar->mutex);
}
static void ar5523_flush_tx(struct ar5523 *ar)
{
ar5523_tx_work_locked(ar);
/* Don't waste time trying to flush if USB is disconnected */
if (test_bit(AR5523_USB_DISCONNECTED, &ar->flags))
return;
if (!wait_event_timeout(ar->tx_flush_waitq,
!atomic_read(&ar->tx_nr_pending), AR5523_FLUSH_TIMEOUT))
ar5523_err(ar, "flush timeout (tot %d pend %d)\n",
atomic_read(&ar->tx_nr_total),
atomic_read(&ar->tx_nr_pending));
}
static void ar5523_free_tx_cmd(struct ar5523 *ar)
{
struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
usb_free_coherent(ar->dev, AR5523_MAX_RXCMDSZ, cmd->buf_tx,
cmd->urb_tx->transfer_dma);
usb_free_urb(cmd->urb_tx);
}
static int ar5523_alloc_tx_cmd(struct ar5523 *ar)
{
struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
cmd->ar = ar;
init_completion(&cmd->done);
cmd->urb_tx = usb_alloc_urb(0, GFP_KERNEL);
if (!cmd->urb_tx)
return -ENOMEM;
cmd->buf_tx = usb_alloc_coherent(ar->dev, AR5523_MAX_TXCMDSZ,
GFP_KERNEL,
&cmd->urb_tx->transfer_dma);
if (!cmd->buf_tx) {
usb_free_urb(cmd->urb_tx);
return -ENOMEM;
}
return 0;
}
/*
* This function is called periodically (every second) when associated to
* query device statistics.
*/
static void ar5523_stat_work(struct work_struct *work)
{
struct ar5523 *ar = container_of(work, struct ar5523, stat_work.work);
int error;
ar5523_dbg(ar, "%s\n", __func__);
mutex_lock(&ar->mutex);
/*
* Send request for statistics asynchronously once a second. This
* seems to be important. Throughput is a lot better if this is done.
*/
error = ar5523_cmd_write(ar, WDCMSG_TARGET_GET_STATS, NULL, 0, 0);
if (error)
ar5523_err(ar, "could not query stats, error %d\n", error);
mutex_unlock(&ar->mutex);
ieee80211_queue_delayed_work(ar->hw, &ar->stat_work, HZ);
}
/*
* Interface routines to the mac80211 stack.
*/
static int ar5523_start(struct ieee80211_hw *hw)
{
struct ar5523 *ar = hw->priv;
int error;
__be32 val;
ar5523_dbg(ar, "start called\n");
mutex_lock(&ar->mutex);
val = cpu_to_be32(0);
ar5523_cmd_write(ar, WDCMSG_BIND, &val, sizeof(val), 0);
/* set MAC address */
ar5523_config_multi(ar, CFG_MAC_ADDR, &ar->hw->wiphy->perm_addr,
ETH_ALEN);
/* XXX honor net80211 state */
ar5523_config(ar, CFG_RATE_CONTROL_ENABLE, 0x00000001);
ar5523_config(ar, CFG_DIVERSITY_CTL, 0x00000001);
ar5523_config(ar, CFG_ABOLT, 0x0000003f);
ar5523_config(ar, CFG_WME_ENABLED, 0x00000000);
ar5523_config(ar, CFG_SERVICE_TYPE, 1);
ar5523_config(ar, CFG_TP_SCALE, 0x00000000);
ar5523_config(ar, CFG_TPC_HALF_DBM5, 0x0000003c);
ar5523_config(ar, CFG_TPC_HALF_DBM2, 0x0000003c);
ar5523_config(ar, CFG_OVERRD_TX_POWER, 0x00000000);
ar5523_config(ar, CFG_GMODE_PROTECTION, 0x00000000);
ar5523_config(ar, CFG_GMODE_PROTECT_RATE_INDEX, 0x00000003);
ar5523_config(ar, CFG_PROTECTION_TYPE, 0x00000000);
ar5523_config(ar, CFG_MODE_CTS, 0x00000002);
error = ar5523_cmd_read(ar, WDCMSG_TARGET_START, NULL, 0,
&val, sizeof(val), AR5523_CMD_FLAG_MAGIC);
if (error) {
ar5523_dbg(ar, "could not start target, error %d\n", error);
goto err;
}
ar5523_dbg(ar, "WDCMSG_TARGET_START returns handle: 0x%x\n",
be32_to_cpu(val));
ar5523_switch_chan(ar);
val = cpu_to_be32(TARGET_DEVICE_AWAKE);
ar5523_cmd_write(ar, WDCMSG_SET_PWR_MODE, &val, sizeof(val), 0);
/* XXX? check */
ar5523_cmd_write(ar, WDCMSG_RESET_KEY_CACHE, NULL, 0, 0);
set_bit(AR5523_HW_UP, &ar->flags);
queue_work(ar->wq, &ar->rx_refill_work);
/* enable Rx */
ar5523_set_rxfilter(ar, 0, UATH_FILTER_OP_INIT);
ar5523_set_rxfilter(ar,
UATH_FILTER_RX_UCAST | UATH_FILTER_RX_MCAST |
UATH_FILTER_RX_BCAST | UATH_FILTER_RX_BEACON,
UATH_FILTER_OP_SET);
ar5523_set_ledsteady(ar, UATH_LED_ACTIVITY, UATH_LED_ON);
ar5523_dbg(ar, "start OK\n");
err:
mutex_unlock(&ar->mutex);
return error;
}
static void ar5523_stop(struct ieee80211_hw *hw)
{
struct ar5523 *ar = hw->priv;
ar5523_dbg(ar, "stop called\n");
cancel_delayed_work_sync(&ar->stat_work);
mutex_lock(&ar->mutex);
clear_bit(AR5523_HW_UP, &ar->flags);
ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_OFF);
ar5523_set_ledsteady(ar, UATH_LED_ACTIVITY, UATH_LED_OFF);
ar5523_cmd_write(ar, WDCMSG_TARGET_STOP, NULL, 0, 0);
del_timer_sync(&ar->tx_wd_timer);
cancel_work_sync(&ar->tx_wd_work);
cancel_work_sync(&ar->rx_refill_work);
ar5523_cancel_rx_bufs(ar);
mutex_unlock(&ar->mutex);
}
static int ar5523_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
{
struct ar5523 *ar = hw->priv;
int ret;
ar5523_dbg(ar, "set_rts_threshold called\n");
mutex_lock(&ar->mutex);
ret = ar5523_config(ar, CFG_USER_RTS_THRESHOLD, value);
mutex_unlock(&ar->mutex);
return ret;
}
static void ar5523_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
u32 queues, bool drop)
{
struct ar5523 *ar = hw->priv;
ar5523_dbg(ar, "flush called\n");
ar5523_flush_tx(ar);
}
static int ar5523_add_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct ar5523 *ar = hw->priv;
ar5523_dbg(ar, "add interface called\n");
if (ar->vif) {
ar5523_dbg(ar, "invalid add_interface\n");
return -EOPNOTSUPP;
}
switch (vif->type) {
case NL80211_IFTYPE_STATION:
ar->vif = vif;
break;
default:
return -EOPNOTSUPP;
}
return 0;
}
static void ar5523_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct ar5523 *ar = hw->priv;
ar5523_dbg(ar, "remove interface called\n");
ar->vif = NULL;
}
static int ar5523_hwconfig(struct ieee80211_hw *hw, u32 changed)
{
struct ar5523 *ar = hw->priv;
ar5523_dbg(ar, "config called\n");
mutex_lock(&ar->mutex);
if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
ar5523_dbg(ar, "Do channel switch\n");
ar5523_flush_tx(ar);
ar5523_switch_chan(ar);
}
mutex_unlock(&ar->mutex);
return 0;
}
static int ar5523_get_wlan_mode(struct ar5523 *ar,
struct ieee80211_bss_conf *bss_conf)
{
struct ieee80211_supported_band *band;
int bit;
struct ieee80211_sta *sta;
u32 sta_rate_set;
band = ar->hw->wiphy->bands[ar->hw->conf.chandef.chan->band];
sta = ieee80211_find_sta(ar->vif, bss_conf->bssid);
if (!sta) {
ar5523_info(ar, "STA not found!\n");
return WLAN_MODE_11b;
}
sta_rate_set = sta->supp_rates[ar->hw->conf.chandef.chan->band];
for (bit = 0; bit < band->n_bitrates; bit++) {
if (sta_rate_set & 1) {
int rate = band->bitrates[bit].bitrate;
switch (rate) {
case 60:
case 90:
case 120:
case 180:
case 240:
case 360:
case 480:
case 540:
return WLAN_MODE_11g;
}
}
sta_rate_set >>= 1;
}
return WLAN_MODE_11b;
}
static void ar5523_create_rateset(struct ar5523 *ar,
struct ieee80211_bss_conf *bss_conf,
struct ar5523_cmd_rateset *rs,
bool basic)
{
struct ieee80211_supported_band *band;
struct ieee80211_sta *sta;
int bit, i = 0;
u32 sta_rate_set, basic_rate_set;
sta = ieee80211_find_sta(ar->vif, bss_conf->bssid);
basic_rate_set = bss_conf->basic_rates;
if (!sta) {
ar5523_info(ar, "STA not found. Cannot set rates\n");
sta_rate_set = bss_conf->basic_rates;
} else
sta_rate_set = sta->supp_rates[ar->hw->conf.chandef.chan->band];
ar5523_dbg(ar, "sta rate_set = %08x\n", sta_rate_set);
band = ar->hw->wiphy->bands[ar->hw->conf.chandef.chan->band];
for (bit = 0; bit < band->n_bitrates; bit++) {
BUG_ON(i >= AR5523_MAX_NRATES);
ar5523_dbg(ar, "Considering rate %d : %d\n",
band->bitrates[bit].hw_value, sta_rate_set & 1);
if (sta_rate_set & 1) {
rs->set[i] = band->bitrates[bit].hw_value;
if (basic_rate_set & 1 && basic)
rs->set[i] |= 0x80;
i++;
}
sta_rate_set >>= 1;
basic_rate_set >>= 1;
}
rs->length = i;
}
static int ar5523_set_basic_rates(struct ar5523 *ar,
struct ieee80211_bss_conf *bss)
{
struct ar5523_cmd_rates rates;
memset(&rates, 0, sizeof(rates));
rates.connid = cpu_to_be32(2); /* XXX */
rates.size = cpu_to_be32(sizeof(struct ar5523_cmd_rateset));
ar5523_create_rateset(ar, bss, &rates.rateset, true);
return ar5523_cmd_write(ar, WDCMSG_SET_BASIC_RATE, &rates,
sizeof(rates), 0);
}
static int ar5523_create_connection(struct ar5523 *ar,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *bss)
{
struct ar5523_cmd_create_connection create;
int wlan_mode;
memset(&create, 0, sizeof(create));
create.connid = cpu_to_be32(2);
create.bssid = cpu_to_be32(0);
/* XXX packed or not? */
create.size = cpu_to_be32(sizeof(struct ar5523_cmd_rateset));
ar5523_create_rateset(ar, bss, &create.connattr.rateset, false);
wlan_mode = ar5523_get_wlan_mode(ar, bss);
create.connattr.wlanmode = cpu_to_be32(wlan_mode);
return ar5523_cmd_write(ar, WDCMSG_CREATE_CONNECTION, &create,
sizeof(create), 0);
}
static int ar5523_write_associd(struct ar5523 *ar,
struct ieee80211_bss_conf *bss)
{
struct ar5523_cmd_set_associd associd;
memset(&associd, 0, sizeof(associd));
associd.defaultrateix = cpu_to_be32(0); /* XXX */
associd.associd = cpu_to_be32(bss->aid);
associd.timoffset = cpu_to_be32(0x3b); /* XXX */
memcpy(associd.bssid, bss->bssid, ETH_ALEN);
return ar5523_cmd_write(ar, WDCMSG_WRITE_ASSOCID, &associd,
sizeof(associd), 0);
}
static void ar5523_bss_info_changed(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *bss,
u32 changed)
{
struct ar5523 *ar = hw->priv;
int error;
ar5523_dbg(ar, "bss_info_changed called\n");
mutex_lock(&ar->mutex);
if (!(changed & BSS_CHANGED_ASSOC))
goto out_unlock;
if (bss->assoc) {
error = ar5523_create_connection(ar, vif, bss);
if (error) {
ar5523_err(ar, "could not create connection\n");
goto out_unlock;
}
error = ar5523_set_basic_rates(ar, bss);
if (error) {
ar5523_err(ar, "could not set negotiated rate set\n");
goto out_unlock;
}
error = ar5523_write_associd(ar, bss);
if (error) {
ar5523_err(ar, "could not set association\n");
goto out_unlock;
}
/* turn link LED on */
ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_ON);
set_bit(AR5523_CONNECTED, &ar->flags);
ieee80211_queue_delayed_work(hw, &ar->stat_work, HZ);
} else {
cancel_delayed_work(&ar->stat_work);
clear_bit(AR5523_CONNECTED, &ar->flags);
ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_OFF);
}
out_unlock:
mutex_unlock(&ar->mutex);
}
#define AR5523_SUPPORTED_FILTERS (FIF_ALLMULTI | \
FIF_FCSFAIL | \
FIF_OTHER_BSS)
static void ar5523_configure_filter(struct ieee80211_hw *hw,
unsigned int changed_flags,
unsigned int *total_flags,
u64 multicast)
{
struct ar5523 *ar = hw->priv;
u32 filter = 0;
ar5523_dbg(ar, "configure_filter called\n");
mutex_lock(&ar->mutex);
ar5523_flush_tx(ar);
*total_flags &= AR5523_SUPPORTED_FILTERS;
/* The filters seems strange. UATH_FILTER_RX_BCAST and
* UATH_FILTER_RX_MCAST does not result in those frames being RXed.
* The only way I have found to get [mb]cast frames seems to be
* to set UATH_FILTER_RX_PROM. */
filter |= UATH_FILTER_RX_UCAST | UATH_FILTER_RX_MCAST |
UATH_FILTER_RX_BCAST | UATH_FILTER_RX_BEACON |
UATH_FILTER_RX_PROM;
ar5523_set_rxfilter(ar, 0, UATH_FILTER_OP_INIT);
ar5523_set_rxfilter(ar, filter, UATH_FILTER_OP_SET);
mutex_unlock(&ar->mutex);
}
static const struct ieee80211_ops ar5523_ops = {
.start = ar5523_start,
.stop = ar5523_stop,
.tx = ar5523_tx,
.set_rts_threshold = ar5523_set_rts_threshold,
.add_interface = ar5523_add_interface,
.remove_interface = ar5523_remove_interface,
.config = ar5523_hwconfig,
.bss_info_changed = ar5523_bss_info_changed,
.configure_filter = ar5523_configure_filter,
.flush = ar5523_flush,
};
static int ar5523_host_available(struct ar5523 *ar)
{
struct ar5523_cmd_host_available setup;
/* inform target the host is available */
setup.sw_ver_major = cpu_to_be32(ATH_SW_VER_MAJOR);
setup.sw_ver_minor = cpu_to_be32(ATH_SW_VER_MINOR);
setup.sw_ver_patch = cpu_to_be32(ATH_SW_VER_PATCH);
setup.sw_ver_build = cpu_to_be32(ATH_SW_VER_BUILD);
return ar5523_cmd_read(ar, WDCMSG_HOST_AVAILABLE,
&setup, sizeof(setup), NULL, 0, 0);
}
static int ar5523_get_devstatus(struct ar5523 *ar)
{
u8 macaddr[ETH_ALEN];
int error;
/* retrieve MAC address */
error = ar5523_get_status(ar, ST_MAC_ADDR, macaddr, ETH_ALEN);
if (error) {
ar5523_err(ar, "could not read MAC address\n");
return error;
}
SET_IEEE80211_PERM_ADDR(ar->hw, macaddr);
error = ar5523_get_status(ar, ST_SERIAL_NUMBER,
&ar->serial[0], sizeof(ar->serial));
if (error) {
ar5523_err(ar, "could not read device serial number\n");
return error;
}
return 0;
}
#define AR5523_SANE_RXBUFSZ 2000
static int ar5523_get_max_rxsz(struct ar5523 *ar)
{
int error;
__be32 rxsize;
/* Get max rx size */
error = ar5523_get_status(ar, ST_WDC_TRANSPORT_CHUNK_SIZE, &rxsize,
sizeof(rxsize));
if (error != 0) {
ar5523_err(ar, "could not read max RX size\n");
return error;
}
ar->rxbufsz = be32_to_cpu(rxsize);
if (!ar->rxbufsz || ar->rxbufsz > AR5523_SANE_RXBUFSZ) {
ar5523_err(ar, "Bad rxbufsz from device. Using %d instead\n",
AR5523_SANE_RXBUFSZ);
ar->rxbufsz = AR5523_SANE_RXBUFSZ;
}
ar5523_dbg(ar, "Max RX buf size: %d\n", ar->rxbufsz);
return 0;
}
/*
* This is copied from rtl818x, but we should probably move this
* to common code as in OpenBSD.
*/
static const struct ieee80211_rate ar5523_rates[] = {
{ .bitrate = 10, .hw_value = 2, },
{ .bitrate = 20, .hw_value = 4 },
{ .bitrate = 55, .hw_value = 11, },
{ .bitrate = 110, .hw_value = 22, },
{ .bitrate = 60, .hw_value = 12, },
{ .bitrate = 90, .hw_value = 18, },
{ .bitrate = 120, .hw_value = 24, },
{ .bitrate = 180, .hw_value = 36, },
{ .bitrate = 240, .hw_value = 48, },
{ .bitrate = 360, .hw_value = 72, },
{ .bitrate = 480, .hw_value = 96, },
{ .bitrate = 540, .hw_value = 108, },
};
static const struct ieee80211_channel ar5523_channels[] = {
{ .center_freq = 2412 },
{ .center_freq = 2417 },
{ .center_freq = 2422 },
{ .center_freq = 2427 },
{ .center_freq = 2432 },
{ .center_freq = 2437 },
{ .center_freq = 2442 },
{ .center_freq = 2447 },
{ .center_freq = 2452 },
{ .center_freq = 2457 },
{ .center_freq = 2462 },
{ .center_freq = 2467 },
{ .center_freq = 2472 },
{ .center_freq = 2484 },
};
static int ar5523_init_modes(struct ar5523 *ar)
{
BUILD_BUG_ON(sizeof(ar->channels) != sizeof(ar5523_channels));
BUILD_BUG_ON(sizeof(ar->rates) != sizeof(ar5523_rates));
memcpy(ar->channels, ar5523_channels, sizeof(ar5523_channels));
memcpy(ar->rates, ar5523_rates, sizeof(ar5523_rates));
ar->band.band = NL80211_BAND_2GHZ;
ar->band.channels = ar->channels;
ar->band.n_channels = ARRAY_SIZE(ar5523_channels);
ar->band.bitrates = ar->rates;
ar->band.n_bitrates = ARRAY_SIZE(ar5523_rates);
ar->hw->wiphy->bands[NL80211_BAND_2GHZ] = &ar->band;
return 0;
}
/*
* Load the MIPS R4000 microcode into the device. Once the image is loaded,
* the device will detach itself from the bus and reattach later with a new
* product Id (a la ezusb).
*/
static int ar5523_load_firmware(struct usb_device *dev)
{
struct ar5523_fwblock *txblock, *rxblock;
const struct firmware *fw;
void *fwbuf;
int len, offset;
int foolen; /* XXX(hch): handle short transfers */
int error = -ENXIO;
if (request_firmware(&fw, AR5523_FIRMWARE_FILE, &dev->dev)) {
dev_err(&dev->dev, "no firmware found: %s\n",
AR5523_FIRMWARE_FILE);
return -ENOENT;
}
txblock = kmalloc(sizeof(*txblock), GFP_KERNEL);
if (!txblock)
goto out;
rxblock = kmalloc(sizeof(*rxblock), GFP_KERNEL);
if (!rxblock)
goto out_free_txblock;
fwbuf = kmalloc(AR5523_MAX_FWBLOCK_SIZE, GFP_KERNEL);
if (!fwbuf)
goto out_free_rxblock;
memset(txblock, 0, sizeof(struct ar5523_fwblock));
txblock->flags = cpu_to_be32(AR5523_WRITE_BLOCK);
txblock->total = cpu_to_be32(fw->size);
offset = 0;
len = fw->size;
while (len > 0) {
int mlen = min(len, AR5523_MAX_FWBLOCK_SIZE);
txblock->remain = cpu_to_be32(len - mlen);
txblock->len = cpu_to_be32(mlen);
/* send firmware block meta-data */
error = usb_bulk_msg(dev, ar5523_cmd_tx_pipe(dev),
txblock, sizeof(*txblock), &foolen,
AR5523_CMD_TIMEOUT);
if (error) {
dev_err(&dev->dev,
"could not send firmware block info\n");
goto out_free_fwbuf;
}
/* send firmware block data */
memcpy(fwbuf, fw->data + offset, mlen);
error = usb_bulk_msg(dev, ar5523_data_tx_pipe(dev),
fwbuf, mlen, &foolen,
AR5523_DATA_TIMEOUT);
if (error) {
dev_err(&dev->dev,
"could not send firmware block data\n");
goto out_free_fwbuf;
}
/* wait for ack from firmware */
error = usb_bulk_msg(dev, ar5523_cmd_rx_pipe(dev),
rxblock, sizeof(*rxblock), &foolen,
AR5523_CMD_TIMEOUT);
if (error) {
dev_err(&dev->dev,
"could not read firmware answer\n");
goto out_free_fwbuf;
}
len -= mlen;
offset += mlen;
}
/*
* Set the error to -ENXIO to make sure we continue probing for
* a driver.
*/
error = -ENXIO;
out_free_fwbuf:
kfree(fwbuf);
out_free_rxblock:
kfree(rxblock);
out_free_txblock:
kfree(txblock);
out:
release_firmware(fw);
return error;
}
static int ar5523_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct usb_device *dev = interface_to_usbdev(intf);
struct ieee80211_hw *hw;
struct ar5523 *ar;
int error = -ENOMEM;
/*
* Load firmware if the device requires it. This will return
* -ENXIO on success and we'll get called back afer the usb
* id changes to indicate that the firmware is present.
*/
if (id->driver_info & AR5523_FLAG_PRE_FIRMWARE)
return ar5523_load_firmware(dev);
hw = ieee80211_alloc_hw(sizeof(*ar), &ar5523_ops);
if (!hw)
goto out;
SET_IEEE80211_DEV(hw, &intf->dev);
ar = hw->priv;
ar->hw = hw;
ar->dev = dev;
mutex_init(&ar->mutex);
INIT_DELAYED_WORK(&ar->stat_work, ar5523_stat_work);
timer_setup(&ar->tx_wd_timer, ar5523_tx_wd_timer, 0);
INIT_WORK(&ar->tx_wd_work, ar5523_tx_wd_work);
INIT_WORK(&ar->tx_work, ar5523_tx_work);
INIT_LIST_HEAD(&ar->tx_queue_pending);
INIT_LIST_HEAD(&ar->tx_queue_submitted);
spin_lock_init(&ar->tx_data_list_lock);
atomic_set(&ar->tx_nr_total, 0);
atomic_set(&ar->tx_nr_pending, 0);
init_waitqueue_head(&ar->tx_flush_waitq);
atomic_set(&ar->rx_data_free_cnt, 0);
INIT_WORK(&ar->rx_refill_work, ar5523_rx_refill_work);
INIT_LIST_HEAD(&ar->rx_data_free);
INIT_LIST_HEAD(&ar->rx_data_used);
spin_lock_init(&ar->rx_data_list_lock);
ar->wq = create_singlethread_workqueue("ar5523");
if (!ar->wq) {
ar5523_err(ar, "Could not create wq\n");
goto out_free_ar;
}
error = ar5523_alloc_rx_bufs(ar);
if (error) {
ar5523_err(ar, "Could not allocate rx buffers\n");
goto out_free_wq;
}
error = ar5523_alloc_rx_cmd(ar);
if (error) {
ar5523_err(ar, "Could not allocate rx command buffers\n");
goto out_free_rx_bufs;
}
error = ar5523_alloc_tx_cmd(ar);
if (error) {
ar5523_err(ar, "Could not allocate tx command buffers\n");
goto out_free_rx_cmd;
}
error = ar5523_submit_rx_cmd(ar);
if (error) {
ar5523_err(ar, "Failed to submit rx cmd\n");
goto out_free_tx_cmd;
}
/*
* We're now ready to send/receive firmware commands.
*/
error = ar5523_host_available(ar);
if (error) {
ar5523_err(ar, "could not initialize adapter\n");
goto out_cancel_rx_cmd;
}
error = ar5523_get_max_rxsz(ar);
if (error) {
ar5523_err(ar, "could not get caps from adapter\n");
goto out_cancel_rx_cmd;
}
error = ar5523_get_devcap(ar);
if (error) {
ar5523_err(ar, "could not get caps from adapter\n");
goto out_cancel_rx_cmd;
}
error = ar5523_get_devstatus(ar);
if (error != 0) {
ar5523_err(ar, "could not get device status\n");
goto out_cancel_rx_cmd;
}
ar5523_info(ar, "MAC/BBP AR5523, RF AR%c112\n",
(id->driver_info & AR5523_FLAG_ABG) ? '5' : '2');
ar->vif = NULL;
ieee80211_hw_set(hw, HAS_RATE_CONTROL);
ieee80211_hw_set(hw, RX_INCLUDES_FCS);
ieee80211_hw_set(hw, SIGNAL_DBM);
hw->extra_tx_headroom = sizeof(struct ar5523_tx_desc) +
sizeof(struct ar5523_chunk);
hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
hw->queues = 1;
error = ar5523_init_modes(ar);
if (error)
goto out_cancel_rx_cmd;
wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
usb_set_intfdata(intf, hw);
error = ieee80211_register_hw(hw);
if (error) {
ar5523_err(ar, "could not register device\n");
goto out_cancel_rx_cmd;
}
ar5523_info(ar, "Found and initialized AR5523 device\n");
return 0;
out_cancel_rx_cmd:
ar5523_cancel_rx_cmd(ar);
out_free_tx_cmd:
ar5523_free_tx_cmd(ar);
out_free_rx_cmd:
ar5523_free_rx_cmd(ar);
out_free_rx_bufs:
ar5523_free_rx_bufs(ar);
out_free_wq:
destroy_workqueue(ar->wq);
out_free_ar:
ieee80211_free_hw(hw);
out:
return error;
}
static void ar5523_disconnect(struct usb_interface *intf)
{
struct ieee80211_hw *hw = usb_get_intfdata(intf);
struct ar5523 *ar = hw->priv;
ar5523_dbg(ar, "detaching\n");
set_bit(AR5523_USB_DISCONNECTED, &ar->flags);
ieee80211_unregister_hw(hw);
ar5523_cancel_rx_cmd(ar);
ar5523_free_tx_cmd(ar);
ar5523_free_rx_cmd(ar);
ar5523_free_rx_bufs(ar);
destroy_workqueue(ar->wq);
ieee80211_free_hw(hw);
usb_set_intfdata(intf, NULL);
}
#define AR5523_DEVICE_UG(vendor, device) \
{ USB_DEVICE((vendor), (device)) }, \
{ USB_DEVICE((vendor), (device) + 1), \
.driver_info = AR5523_FLAG_PRE_FIRMWARE }
#define AR5523_DEVICE_UX(vendor, device) \
{ USB_DEVICE((vendor), (device)), \
.driver_info = AR5523_FLAG_ABG }, \
{ USB_DEVICE((vendor), (device) + 1), \
.driver_info = AR5523_FLAG_ABG|AR5523_FLAG_PRE_FIRMWARE }
static const struct usb_device_id ar5523_id_table[] = {
AR5523_DEVICE_UG(0x168c, 0x0001), /* Atheros / AR5523 */
AR5523_DEVICE_UG(0x0cf3, 0x0001), /* Atheros2 / AR5523_1 */
AR5523_DEVICE_UG(0x0cf3, 0x0003), /* Atheros2 / AR5523_2 */
AR5523_DEVICE_UX(0x0cf3, 0x0005), /* Atheros2 / AR5523_3 */
AR5523_DEVICE_UG(0x0d8e, 0x7801), /* Conceptronic / AR5523_1 */
AR5523_DEVICE_UX(0x0d8e, 0x7811), /* Conceptronic / AR5523_2 */
AR5523_DEVICE_UX(0x2001, 0x3a00), /* Dlink / DWLAG132 */
AR5523_DEVICE_UG(0x2001, 0x3a02), /* Dlink / DWLG132 */
AR5523_DEVICE_UX(0x2001, 0x3a04), /* Dlink / DWLAG122 */
AR5523_DEVICE_UG(0x07d1, 0x3a07), /* D-Link / WUA-2340 rev A1 */
AR5523_DEVICE_UG(0x1690, 0x0712), /* Gigaset / AR5523 */
AR5523_DEVICE_UG(0x1690, 0x0710), /* Gigaset / SMCWUSBTG */
AR5523_DEVICE_UG(0x129b, 0x160b), /* Gigaset / USB stick 108
(CyberTAN Technology) */
AR5523_DEVICE_UG(0x16ab, 0x7801), /* Globalsun / AR5523_1 */
AR5523_DEVICE_UX(0x16ab, 0x7811), /* Globalsun / AR5523_2 */
AR5523_DEVICE_UG(0x0d8e, 0x7802), /* Globalsun / AR5523_3 */
AR5523_DEVICE_UX(0x0846, 0x4300), /* Netgear / WG111U */
AR5523_DEVICE_UG(0x0846, 0x4250), /* Netgear / WG111T */
AR5523_DEVICE_UG(0x0846, 0x5f00), /* Netgear / WPN111 */
AR5523_DEVICE_UG(0x157e, 0x3006), /* Umedia / AR5523_1 */
AR5523_DEVICE_UX(0x157e, 0x3205), /* Umedia / AR5523_2 */
AR5523_DEVICE_UG(0x157e, 0x3006), /* Umedia / TEW444UBEU */
AR5523_DEVICE_UG(0x1435, 0x0826), /* Wistronneweb / AR5523_1 */
AR5523_DEVICE_UX(0x1435, 0x0828), /* Wistronneweb / AR5523_2 */
AR5523_DEVICE_UG(0x0cde, 0x0012), /* Zcom / AR5523 */
AR5523_DEVICE_UG(0x1385, 0x4250), /* Netgear3 / WG111T (2) */
AR5523_DEVICE_UG(0x1385, 0x5f00), /* Netgear / WPN111 */
AR5523_DEVICE_UG(0x1385, 0x5f02), /* Netgear / WPN111 */
{ }
};
MODULE_DEVICE_TABLE(usb, ar5523_id_table);
static struct usb_driver ar5523_driver = {
.name = "ar5523",
.id_table = ar5523_id_table,
.probe = ar5523_probe,
.disconnect = ar5523_disconnect,
};
module_usb_driver(ar5523_driver);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_FIRMWARE(AR5523_FIRMWARE_FILE);
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