ar9170: ar9170: USB frontend driver
authorChristian Lamparter <chunkeey@web.de>
Sat, 21 Mar 2009 22:05:48 +0000 (23:05 +0100)
committerJohn W. Linville <linville@tuxdriver.com>
Sat, 28 Mar 2009 00:13:09 +0000 (20:13 -0400)
USB frontend driver code for Atheros' AR9170 modules.

Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
drivers/net/wireless/ar9170/usb.c [new file with mode: 0644]
drivers/net/wireless/ar9170/usb.h [new file with mode: 0644]

diff --git a/drivers/net/wireless/ar9170/usb.c b/drivers/net/wireless/ar9170/usb.c
new file mode 100644 (file)
index 0000000..ede511e
--- /dev/null
@@ -0,0 +1,747 @@
+/*
+ * Atheros AR9170 driver
+ *
+ * USB - frontend
+ *
+ * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2009, Christian Lamparter <chunkeey@web.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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; see the file COPYING.  If not, see
+ * http://www.gnu.org/licenses/.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *    Copyright (c) 2007-2008 Atheros Communications, Inc.
+ *
+ *    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.
+ */
+
+#include <linux/module.h>
+#include <linux/usb.h>
+#include <linux/firmware.h>
+#include <linux/etherdevice.h>
+#include <net/mac80211.h>
+#include "ar9170.h"
+#include "cmd.h"
+#include "hw.h"
+#include "usb.h"
+
+MODULE_AUTHOR("Christian Lamparter <chunkeey@web.de>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("USB Driver for Atheros AR9170 based devices");
+MODULE_FIRMWARE("ar9170-1.fw");
+MODULE_FIRMWARE("ar9170-2.fw");
+
+static struct usb_device_id ar9170_usb_ids[] = {
+       /* Atheros 9170 */
+       { USB_DEVICE(0x0cf3, 0x9170) },
+       /* Atheros TG121N */
+       { USB_DEVICE(0x0cf3, 0x1001) },
+       /* D-Link DWA 160A */
+       { USB_DEVICE(0x07d1, 0x3c10) },
+       /* Netgear WNDA3100 */
+       { USB_DEVICE(0x0846, 0x9010) },
+       /* Netgear WN111 v2 */
+       { USB_DEVICE(0x0846, 0x9001) },
+       /* Zydas ZD1221 */
+       { USB_DEVICE(0x0ace, 0x1221) },
+       /* Z-Com UB81 BG */
+       { USB_DEVICE(0x0cde, 0x0023) },
+       /* Z-Com UB82 ABG */
+       { USB_DEVICE(0x0cde, 0x0026) },
+       /* Arcadyan WN7512 */
+       { USB_DEVICE(0x083a, 0xf522) },
+       /* Planex GWUS300 */
+       { USB_DEVICE(0x2019, 0x5304) },
+       /* IO-Data WNGDNUS2 */
+       { USB_DEVICE(0x04bb, 0x093f) },
+
+       /* terminate */
+       {}
+};
+MODULE_DEVICE_TABLE(usb, ar9170_usb_ids);
+
+static void ar9170_usb_tx_urb_complete_free(struct urb *urb)
+{
+       struct sk_buff *skb = urb->context;
+       struct ar9170_usb *aru = (struct ar9170_usb *)
+             usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
+
+       if (!aru) {
+               dev_kfree_skb_irq(skb);
+               return ;
+       }
+
+       ar9170_handle_tx_status(&aru->common, skb, false,
+                               AR9170_TX_STATUS_COMPLETE);
+}
+
+static void ar9170_usb_tx_urb_complete(struct urb *urb)
+{
+}
+
+static void ar9170_usb_irq_completed(struct urb *urb)
+{
+       struct ar9170_usb *aru = urb->context;
+
+       switch (urb->status) {
+       /* everything is fine */
+       case 0:
+               break;
+
+       /* disconnect */
+       case -ENOENT:
+       case -ECONNRESET:
+       case -ENODEV:
+       case -ESHUTDOWN:
+               goto free;
+
+       default:
+               goto resubmit;
+       }
+
+       print_hex_dump_bytes("ar9170 irq: ", DUMP_PREFIX_OFFSET,
+                            urb->transfer_buffer, urb->actual_length);
+
+resubmit:
+       usb_anchor_urb(urb, &aru->rx_submitted);
+       if (usb_submit_urb(urb, GFP_ATOMIC)) {
+               usb_unanchor_urb(urb);
+               goto free;
+       }
+
+       return;
+
+free:
+       usb_buffer_free(aru->udev, 64, urb->transfer_buffer, urb->transfer_dma);
+}
+
+static void ar9170_usb_rx_completed(struct urb *urb)
+{
+       struct sk_buff *skb = urb->context;
+       struct ar9170_usb *aru = (struct ar9170_usb *)
+               usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
+       int err;
+
+       if (!aru)
+               goto free;
+
+       switch (urb->status) {
+       /* everything is fine */
+       case 0:
+               break;
+
+       /* disconnect */
+       case -ENOENT:
+       case -ECONNRESET:
+       case -ENODEV:
+       case -ESHUTDOWN:
+               goto free;
+
+       default:
+               goto resubmit;
+       }
+
+       skb_put(skb, urb->actual_length);
+       ar9170_rx(&aru->common, skb);
+
+resubmit:
+       skb_reset_tail_pointer(skb);
+       skb_trim(skb, 0);
+
+       usb_anchor_urb(urb, &aru->rx_submitted);
+       err = usb_submit_urb(urb, GFP_ATOMIC);
+       if (err) {
+               usb_unanchor_urb(urb);
+               dev_kfree_skb_irq(skb);
+       }
+
+       return ;
+
+free:
+       dev_kfree_skb_irq(skb);
+       return;
+}
+
+static int ar9170_usb_prep_rx_urb(struct ar9170_usb *aru,
+                                 struct urb *urb, gfp_t gfp)
+{
+       struct sk_buff *skb;
+
+       skb = __dev_alloc_skb(AR9170_MAX_RX_BUFFER_SIZE + 32, gfp);
+       if (!skb)
+               return -ENOMEM;
+
+       /* reserve some space for mac80211's radiotap */
+       skb_reserve(skb, 32);
+
+       usb_fill_bulk_urb(urb, aru->udev,
+                         usb_rcvbulkpipe(aru->udev, AR9170_EP_RX),
+                         skb->data, min(skb_tailroom(skb),
+                         AR9170_MAX_RX_BUFFER_SIZE),
+                         ar9170_usb_rx_completed, skb);
+
+       return 0;
+}
+
+static int ar9170_usb_alloc_rx_irq_urb(struct ar9170_usb *aru)
+{
+       struct urb *urb = NULL;
+       void *ibuf;
+       int err = -ENOMEM;
+
+       /* initialize interrupt endpoint */
+       urb = usb_alloc_urb(0, GFP_KERNEL);
+       if (!urb)
+               goto out;
+
+       ibuf = usb_buffer_alloc(aru->udev, 64, GFP_KERNEL, &urb->transfer_dma);
+       if (!ibuf)
+               goto out;
+
+       usb_fill_int_urb(urb, aru->udev,
+                        usb_rcvintpipe(aru->udev, AR9170_EP_IRQ), ibuf,
+                        64, ar9170_usb_irq_completed, aru, 1);
+       urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+       usb_anchor_urb(urb, &aru->rx_submitted);
+       err = usb_submit_urb(urb, GFP_KERNEL);
+       if (err) {
+               usb_unanchor_urb(urb);
+               usb_buffer_free(aru->udev, 64, urb->transfer_buffer,
+                               urb->transfer_dma);
+       }
+
+out:
+       usb_free_urb(urb);
+       return err;
+}
+
+static int ar9170_usb_alloc_rx_bulk_urbs(struct ar9170_usb *aru)
+{
+       struct urb *urb;
+       int i;
+       int err = -EINVAL;
+
+       for (i = 0; i < AR9170_NUM_RX_URBS; i++) {
+               err = -ENOMEM;
+               urb = usb_alloc_urb(0, GFP_KERNEL);
+               if (!urb)
+                       goto err_out;
+
+               err = ar9170_usb_prep_rx_urb(aru, urb, GFP_KERNEL);
+               if (err) {
+                       usb_free_urb(urb);
+                       goto err_out;
+               }
+
+               usb_anchor_urb(urb, &aru->rx_submitted);
+               err = usb_submit_urb(urb, GFP_KERNEL);
+               if (err) {
+                       usb_unanchor_urb(urb);
+                       dev_kfree_skb_any((void *) urb->transfer_buffer);
+                       usb_free_urb(urb);
+                       goto err_out;
+               }
+               usb_free_urb(urb);
+       }
+
+       /* the device now waiting for a firmware. */
+       aru->common.state = AR9170_IDLE;
+       return 0;
+
+err_out:
+
+       usb_kill_anchored_urbs(&aru->rx_submitted);
+       return err;
+}
+
+static void ar9170_usb_cancel_urbs(struct ar9170_usb *aru)
+{
+       int ret;
+
+       aru->common.state = AR9170_UNKNOWN_STATE;
+
+       usb_unlink_anchored_urbs(&aru->tx_submitted);
+
+       /* give the LED OFF command and the deauth frame a chance to air. */
+       ret = usb_wait_anchor_empty_timeout(&aru->tx_submitted,
+                                           msecs_to_jiffies(100));
+       if (ret == 0)
+               dev_err(&aru->udev->dev, "kill pending tx urbs.\n");
+       usb_poison_anchored_urbs(&aru->tx_submitted);
+
+       usb_poison_anchored_urbs(&aru->rx_submitted);
+}
+
+static int ar9170_usb_exec_cmd(struct ar9170 *ar, enum ar9170_cmd cmd,
+                              unsigned int plen, void *payload,
+                              unsigned int outlen, void *out)
+{
+       struct ar9170_usb *aru = (void *) ar;
+       struct urb *urb = NULL;
+       unsigned long flags;
+       int err = -ENOMEM;
+
+       if (unlikely(!IS_ACCEPTING_CMD(ar)))
+               return -EPERM;
+
+       if (WARN_ON(plen > AR9170_MAX_CMD_LEN - 4))
+               return -EINVAL;
+
+       urb = usb_alloc_urb(0, GFP_ATOMIC);
+       if (unlikely(!urb))
+               goto err_free;
+
+       ar->cmdbuf[0] = cpu_to_le32(plen);
+       ar->cmdbuf[0] |= cpu_to_le32(cmd << 8);
+       /* writing multiple regs fills this buffer already */
+       if (plen && payload != (u8 *)(&ar->cmdbuf[1]))
+               memcpy(&ar->cmdbuf[1], payload, plen);
+
+       spin_lock_irqsave(&aru->common.cmdlock, flags);
+       aru->readbuf = (u8 *)out;
+       aru->readlen = outlen;
+       spin_unlock_irqrestore(&aru->common.cmdlock, flags);
+
+       usb_fill_int_urb(urb, aru->udev,
+                        usb_sndbulkpipe(aru->udev, AR9170_EP_CMD),
+                        aru->common.cmdbuf, plen + 4,
+                        ar9170_usb_tx_urb_complete, NULL, 1);
+
+       usb_anchor_urb(urb, &aru->tx_submitted);
+       err = usb_submit_urb(urb, GFP_ATOMIC);
+       if (err) {
+               usb_unanchor_urb(urb);
+               usb_free_urb(urb);
+               goto err_unbuf;
+       }
+       usb_free_urb(urb);
+
+       err = wait_for_completion_timeout(&aru->cmd_wait, HZ);
+       if (err == 0) {
+               err = -ETIMEDOUT;
+               goto err_unbuf;
+       }
+
+       if (outlen >= 0 && aru->readlen != outlen) {
+               err = -EMSGSIZE;
+               goto err_unbuf;
+       }
+
+       return 0;
+
+err_unbuf:
+       /* Maybe the device was removed in the second we were waiting? */
+       if (IS_STARTED(ar)) {
+               dev_err(&aru->udev->dev, "no command feedback "
+                                        "received (%d).\n", err);
+
+               /* provide some maybe useful debug information */
+               print_hex_dump_bytes("ar9170 cmd: ", DUMP_PREFIX_NONE,
+                                    aru->common.cmdbuf, plen + 4);
+               dump_stack();
+       }
+
+       /* invalidate to avoid completing the next prematurely */
+       spin_lock_irqsave(&aru->common.cmdlock, flags);
+       aru->readbuf = NULL;
+       aru->readlen = 0;
+       spin_unlock_irqrestore(&aru->common.cmdlock, flags);
+
+err_free:
+
+       return err;
+}
+
+static int ar9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb,
+                        bool txstatus_needed, unsigned int extra_len)
+{
+       struct ar9170_usb *aru = (struct ar9170_usb *) ar;
+       struct urb *urb;
+       int err;
+
+       if (unlikely(!IS_STARTED(ar))) {
+               /* Seriously, what were you drink... err... thinking!? */
+               return -EPERM;
+       }
+
+       urb = usb_alloc_urb(0, GFP_ATOMIC);
+       if (unlikely(!urb))
+               return -ENOMEM;
+
+       usb_fill_bulk_urb(urb, aru->udev,
+                         usb_sndbulkpipe(aru->udev, AR9170_EP_TX),
+                         skb->data, skb->len + extra_len, (txstatus_needed ?
+                         ar9170_usb_tx_urb_complete :
+                         ar9170_usb_tx_urb_complete_free), skb);
+       urb->transfer_flags |= URB_ZERO_PACKET;
+
+       usb_anchor_urb(urb, &aru->tx_submitted);
+       err = usb_submit_urb(urb, GFP_ATOMIC);
+       if (unlikely(err))
+               usb_unanchor_urb(urb);
+
+       usb_free_urb(urb);
+       return err;
+}
+
+static void ar9170_usb_callback_cmd(struct ar9170 *ar, u32 len , void *buffer)
+{
+       struct ar9170_usb *aru = (void *) ar;
+       unsigned long flags;
+       u32 in, out;
+
+       if (!buffer)
+               return ;
+
+       in = le32_to_cpup((__le32 *)buffer);
+       out = le32_to_cpu(ar->cmdbuf[0]);
+
+       /* mask off length byte */
+       out &= ~0xFF;
+
+       if (aru->readlen >= 0) {
+               /* add expected length */
+               out |= aru->readlen;
+       } else {
+               /* add obtained length */
+               out |= in & 0xFF;
+       }
+
+       /*
+        * Some commands (e.g: AR9170_CMD_FREQUENCY) have a variable response
+        * length and we cannot predict the correct length in advance.
+        * So we only check if we provided enough space for the data.
+        */
+       if (unlikely(out < in)) {
+               dev_warn(&aru->udev->dev, "received invalid command response "
+                                         "got %d bytes, instead of %d bytes "
+                                         "and the resp length is %d bytes\n",
+                        in, out, len);
+               print_hex_dump_bytes("ar9170 invalid resp: ",
+                                    DUMP_PREFIX_OFFSET, buffer, len);
+               /*
+                * Do not complete, then the command times out,
+                * and we get a stack trace from there.
+                */
+               return ;
+       }
+
+       spin_lock_irqsave(&aru->common.cmdlock, flags);
+       if (aru->readbuf && len > 0) {
+               memcpy(aru->readbuf, buffer + 4, len - 4);
+               aru->readbuf = NULL;
+       }
+       complete(&aru->cmd_wait);
+       spin_unlock_irqrestore(&aru->common.cmdlock, flags);
+}
+
+static int ar9170_usb_upload(struct ar9170_usb *aru, const void *data,
+                            size_t len, u32 addr, bool complete)
+{
+       int transfer, err;
+       u8 *buf = kmalloc(4096, GFP_KERNEL);
+
+       if (!buf)
+               return -ENOMEM;
+
+       while (len) {
+               transfer = min_t(int, len, 4096);
+               memcpy(buf, data, transfer);
+
+               err = usb_control_msg(aru->udev, usb_sndctrlpipe(aru->udev, 0),
+                                     0x30 /* FW DL */, 0x40 | USB_DIR_OUT,
+                                     addr >> 8, 0, buf, transfer, 1000);
+
+               if (err < 0) {
+                       kfree(buf);
+                       return err;
+               }
+
+               len -= transfer;
+               data += transfer;
+               addr += transfer;
+       }
+       kfree(buf);
+
+       if (complete) {
+               err = usb_control_msg(aru->udev, usb_sndctrlpipe(aru->udev, 0),
+                                     0x31 /* FW DL COMPLETE */,
+                                     0x40 | USB_DIR_OUT, 0, 0, NULL, 0, 5000);
+       }
+
+       return 0;
+}
+
+static int ar9170_usb_request_firmware(struct ar9170_usb *aru)
+{
+       int err = 0;
+
+       err = request_firmware(&aru->init_values, "ar9170-1.fw",
+                              &aru->udev->dev);
+       if (err) {
+               dev_err(&aru->udev->dev, "file with init values not found.\n");
+               return err;
+       }
+
+       err = request_firmware(&aru->firmware, "ar9170-2.fw", &aru->udev->dev);
+       if (err) {
+               release_firmware(aru->init_values);
+               dev_err(&aru->udev->dev, "firmware file not found.\n");
+               return err;
+       }
+
+       return err;
+}
+
+static int ar9170_usb_reset(struct ar9170_usb *aru)
+{
+       int ret, lock = (aru->intf->condition != USB_INTERFACE_BINDING);
+
+       if (lock) {
+               ret = usb_lock_device_for_reset(aru->udev, aru->intf);
+               if (ret < 0) {
+                       dev_err(&aru->udev->dev, "unable to lock device "
+                               "for reset (%d).\n", ret);
+                       return ret;
+               }
+       }
+
+       ret = usb_reset_device(aru->udev);
+       if (lock)
+               usb_unlock_device(aru->udev);
+
+       /* let it rest - for a second - */
+       msleep(1000);
+
+       return ret;
+}
+
+static int ar9170_usb_upload_firmware(struct ar9170_usb *aru)
+{
+       int err;
+
+       /* First, upload initial values to device RAM */
+       err = ar9170_usb_upload(aru, aru->init_values->data,
+                               aru->init_values->size, 0x102800, false);
+       if (err) {
+               dev_err(&aru->udev->dev, "firmware part 1 "
+                       "upload failed (%d).\n", err);
+               return err;
+       }
+
+       /* Then, upload the firmware itself and start it */
+       return ar9170_usb_upload(aru, aru->firmware->data, aru->firmware->size,
+                               0x200000, true);
+}
+
+static int ar9170_usb_init_transport(struct ar9170_usb *aru)
+{
+       struct ar9170 *ar = (void *) &aru->common;
+       int err;
+
+       ar9170_regwrite_begin(ar);
+
+       /* Set USB Rx stream mode MAX packet number to 2 */
+       ar9170_regwrite(AR9170_USB_REG_MAX_AGG_UPLOAD, 0x4);
+
+       /* Set USB Rx stream mode timeout to 10us */
+       ar9170_regwrite(AR9170_USB_REG_UPLOAD_TIME_CTL, 0x80);
+
+       ar9170_regwrite_finish();
+
+       err = ar9170_regwrite_result();
+       if (err)
+               dev_err(&aru->udev->dev, "USB setup failed (%d).\n", err);
+
+       return err;
+}
+
+static void ar9170_usb_stop(struct ar9170 *ar)
+{
+       struct ar9170_usb *aru = (void *) ar;
+       int ret;
+
+       if (IS_ACCEPTING_CMD(ar))
+               aru->common.state = AR9170_STOPPED;
+
+       /* lets wait a while until the tx - queues are dried out */
+       ret = usb_wait_anchor_empty_timeout(&aru->tx_submitted,
+                                           msecs_to_jiffies(1000));
+       if (ret == 0)
+               dev_err(&aru->udev->dev, "kill pending tx urbs.\n");
+
+       usb_poison_anchored_urbs(&aru->tx_submitted);
+
+       /*
+        * Note:
+        * So far we freed all tx urbs, but we won't dare to touch any rx urbs.
+        * Else we would end up with a unresponsive device...
+        */
+}
+
+static int ar9170_usb_open(struct ar9170 *ar)
+{
+       struct ar9170_usb *aru = (void *) ar;
+       int err;
+
+       usb_unpoison_anchored_urbs(&aru->tx_submitted);
+       err = ar9170_usb_init_transport(aru);
+       if (err) {
+               usb_poison_anchored_urbs(&aru->tx_submitted);
+               return err;
+       }
+
+       aru->common.state = AR9170_IDLE;
+       return 0;
+}
+
+static int ar9170_usb_probe(struct usb_interface *intf,
+                       const struct usb_device_id *id)
+{
+       struct ar9170_usb *aru;
+       struct ar9170 *ar;
+       struct usb_device *udev;
+       int err;
+
+       aru = ar9170_alloc(sizeof(*aru));
+       if (IS_ERR(aru)) {
+               err = PTR_ERR(aru);
+               goto out;
+       }
+
+       udev = interface_to_usbdev(intf);
+       usb_get_dev(udev);
+       aru->udev = udev;
+       aru->intf = intf;
+       ar = &aru->common;
+
+       usb_set_intfdata(intf, aru);
+       SET_IEEE80211_DEV(ar->hw, &udev->dev);
+
+       init_usb_anchor(&aru->rx_submitted);
+       init_usb_anchor(&aru->tx_submitted);
+       init_completion(&aru->cmd_wait);
+
+       aru->common.stop = ar9170_usb_stop;
+       aru->common.open = ar9170_usb_open;
+       aru->common.tx = ar9170_usb_tx;
+       aru->common.exec_cmd = ar9170_usb_exec_cmd;
+       aru->common.callback_cmd = ar9170_usb_callback_cmd;
+
+       err = ar9170_usb_reset(aru);
+       if (err)
+               goto err_unlock;
+
+       err = ar9170_usb_request_firmware(aru);
+       if (err)
+               goto err_unlock;
+
+       err = ar9170_usb_alloc_rx_irq_urb(aru);
+       if (err)
+               goto err_freefw;
+
+       err = ar9170_usb_alloc_rx_bulk_urbs(aru);
+       if (err)
+               goto err_unrx;
+
+       err = ar9170_usb_upload_firmware(aru);
+       if (err) {
+               err = ar9170_echo_test(&aru->common, 0x60d43110);
+               if (err) {
+                       /* force user invention, by disabling the device */
+                       err = usb_driver_set_configuration(aru->udev, -1);
+                       dev_err(&aru->udev->dev, "device is in a bad state. "
+                                                "please reconnect it!\n");
+                       goto err_unrx;
+               }
+       }
+
+       err = ar9170_usb_open(ar);
+       if (err)
+               goto err_unrx;
+
+       err = ar9170_register(ar, &udev->dev);
+
+       ar9170_usb_stop(ar);
+       if (err)
+               goto err_unrx;
+
+       return 0;
+
+err_unrx:
+       ar9170_usb_cancel_urbs(aru);
+
+err_freefw:
+       release_firmware(aru->init_values);
+       release_firmware(aru->firmware);
+
+err_unlock:
+       usb_set_intfdata(intf, NULL);
+       usb_put_dev(udev);
+       ieee80211_free_hw(ar->hw);
+out:
+       return err;
+}
+
+static void ar9170_usb_disconnect(struct usb_interface *intf)
+{
+       struct ar9170_usb *aru = usb_get_intfdata(intf);
+
+       if (!aru)
+               return;
+
+       aru->common.state = AR9170_IDLE;
+       ar9170_unregister(&aru->common);
+       ar9170_usb_cancel_urbs(aru);
+
+       release_firmware(aru->init_values);
+       release_firmware(aru->firmware);
+
+       usb_put_dev(aru->udev);
+       usb_set_intfdata(intf, NULL);
+       ieee80211_free_hw(aru->common.hw);
+}
+
+static struct usb_driver ar9170_driver = {
+       .name = "ar9170usb",
+       .probe = ar9170_usb_probe,
+       .disconnect = ar9170_usb_disconnect,
+       .id_table = ar9170_usb_ids,
+       .soft_unbind = 1,
+};
+
+static int __init ar9170_init(void)
+{
+       return usb_register(&ar9170_driver);
+}
+
+static void __exit ar9170_exit(void)
+{
+       usb_deregister(&ar9170_driver);
+}
+
+module_init(ar9170_init);
+module_exit(ar9170_exit);
diff --git a/drivers/net/wireless/ar9170/usb.h b/drivers/net/wireless/ar9170/usb.h
new file mode 100644 (file)
index 0000000..f585292
--- /dev/null
@@ -0,0 +1,74 @@
+/*
+ * Atheros AR9170 USB driver
+ *
+ * Driver specific definitions
+ *
+ * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2009, Christian Lamparter <chunkeey@web.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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; see the file COPYING.  If not, see
+ * http://www.gnu.org/licenses/.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *    Copyright (c) 2007-2008 Atheros Communications, Inc.
+ *
+ *    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.
+ */
+#ifndef __USB_H
+#define __USB_H
+
+#include <linux/usb.h>
+#include <linux/completion.h>
+#include <linux/spinlock.h>
+#include <linux/leds.h>
+#include <net/wireless.h>
+#include <net/mac80211.h>
+#include <linux/firmware.h>
+#include "eeprom.h"
+#include "hw.h"
+#include "ar9170.h"
+
+#define AR9170_NUM_RX_URBS                     16
+
+struct firmware;
+
+struct ar9170_usb {
+       struct ar9170 common;
+       struct usb_device *udev;
+       struct usb_interface *intf;
+
+       struct usb_anchor rx_submitted;
+       struct usb_anchor tx_submitted;
+
+       spinlock_t cmdlock;
+       struct completion cmd_wait;
+       int readlen;
+       u8 *readbuf;
+
+       const struct firmware *init_values;
+       const struct firmware *firmware;
+};
+
+#endif /* __USB_H */