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1192 lines
26 KiB
1192 lines
26 KiB
/* |
|
* Atheros CARL9170 driver |
|
* |
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* USB - frontend |
|
* |
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* Copyright 2008, Johannes Berg <[email protected]> |
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* Copyright 2009, 2010, Christian Lamparter <[email protected]> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; see the file COPYING. If not, see |
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* http://www.gnu.org/licenses/. |
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* |
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* This file incorporates work covered by the following copyright and |
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* permission notice: |
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* Copyright (c) 2007-2008 Atheros Communications, Inc. |
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* |
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* Permission to use, copy, modify, and/or distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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|
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#include <linux/module.h> |
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#include <linux/slab.h> |
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#include <linux/usb.h> |
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#include <linux/firmware.h> |
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#include <linux/etherdevice.h> |
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#include <linux/device.h> |
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#include <net/mac80211.h> |
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#include "carl9170.h" |
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#include "cmd.h" |
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#include "hw.h" |
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#include "fwcmd.h" |
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|
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MODULE_AUTHOR("Johannes Berg <[email protected]>"); |
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MODULE_AUTHOR("Christian Lamparter <[email protected]>"); |
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MODULE_LICENSE("GPL"); |
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MODULE_DESCRIPTION("Atheros AR9170 802.11n USB wireless"); |
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MODULE_FIRMWARE(CARL9170FW_NAME); |
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MODULE_ALIAS("ar9170usb"); |
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MODULE_ALIAS("arusb_lnx"); |
|
|
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/* |
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* Note: |
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* |
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* Always update our wiki's device list (located at: |
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* https://wireless.wiki.kernel.org/en/users/Drivers/ar9170/devices ), |
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* whenever you add a new device. |
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*/ |
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static const struct usb_device_id carl9170_usb_ids[] = { |
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/* Atheros 9170 */ |
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{ USB_DEVICE(0x0cf3, 0x9170) }, |
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/* Atheros TG121N */ |
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{ USB_DEVICE(0x0cf3, 0x1001) }, |
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/* TP-Link TL-WN821N v2 */ |
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{ USB_DEVICE(0x0cf3, 0x1002), .driver_info = CARL9170_WPS_BUTTON | |
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CARL9170_ONE_LED }, |
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/* 3Com Dual Band 802.11n USB Adapter */ |
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{ USB_DEVICE(0x0cf3, 0x1010) }, |
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/* H3C Dual Band 802.11n USB Adapter */ |
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{ USB_DEVICE(0x0cf3, 0x1011) }, |
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/* Cace Airpcap NX */ |
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{ USB_DEVICE(0xcace, 0x0300) }, |
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/* D-Link DWA 160 A1 */ |
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{ USB_DEVICE(0x07d1, 0x3c10) }, |
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/* D-Link DWA 160 A2 */ |
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{ USB_DEVICE(0x07d1, 0x3a09) }, |
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/* D-Link DWA 130 D */ |
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{ USB_DEVICE(0x07d1, 0x3a0f) }, |
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/* Netgear WNA1000 */ |
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{ USB_DEVICE(0x0846, 0x9040) }, |
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/* Netgear WNDA3100 (v1) */ |
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{ USB_DEVICE(0x0846, 0x9010) }, |
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/* Netgear WN111 v2 */ |
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{ USB_DEVICE(0x0846, 0x9001), .driver_info = CARL9170_ONE_LED }, |
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/* Zydas ZD1221 */ |
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{ USB_DEVICE(0x0ace, 0x1221) }, |
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/* Proxim ORiNOCO 802.11n USB */ |
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{ USB_DEVICE(0x1435, 0x0804) }, |
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/* WNC Generic 11n USB Dongle */ |
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{ USB_DEVICE(0x1435, 0x0326) }, |
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/* ZyXEL NWD271N */ |
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{ USB_DEVICE(0x0586, 0x3417) }, |
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/* Z-Com UB81 BG */ |
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{ USB_DEVICE(0x0cde, 0x0023) }, |
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/* Z-Com UB82 ABG */ |
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{ USB_DEVICE(0x0cde, 0x0026) }, |
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/* Sphairon Homelink 1202 */ |
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{ USB_DEVICE(0x0cde, 0x0027) }, |
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/* Arcadyan WN7512 */ |
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{ USB_DEVICE(0x083a, 0xf522) }, |
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/* Planex GWUS300 */ |
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{ USB_DEVICE(0x2019, 0x5304) }, |
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/* IO-Data WNGDNUS2 */ |
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{ USB_DEVICE(0x04bb, 0x093f) }, |
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/* NEC WL300NU-G */ |
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{ USB_DEVICE(0x0409, 0x0249) }, |
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/* NEC WL300NU-AG */ |
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{ USB_DEVICE(0x0409, 0x02b4) }, |
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/* AVM FRITZ!WLAN USB Stick N */ |
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{ USB_DEVICE(0x057c, 0x8401) }, |
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/* AVM FRITZ!WLAN USB Stick N 2.4 */ |
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{ USB_DEVICE(0x057c, 0x8402) }, |
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/* Qwest/Actiontec 802AIN Wireless N USB Network Adapter */ |
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{ USB_DEVICE(0x1668, 0x1200) }, |
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/* Airlive X.USB a/b/g/n */ |
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{ USB_DEVICE(0x1b75, 0x9170) }, |
|
|
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/* terminate */ |
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{} |
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}; |
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MODULE_DEVICE_TABLE(usb, carl9170_usb_ids); |
|
|
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static struct usb_driver carl9170_driver; |
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|
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static void carl9170_usb_submit_data_urb(struct ar9170 *ar) |
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{ |
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struct urb *urb; |
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int err; |
|
|
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if (atomic_inc_return(&ar->tx_anch_urbs) > AR9170_NUM_TX_URBS) |
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goto err_acc; |
|
|
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urb = usb_get_from_anchor(&ar->tx_wait); |
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if (!urb) |
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goto err_acc; |
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|
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usb_anchor_urb(urb, &ar->tx_anch); |
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|
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err = usb_submit_urb(urb, GFP_ATOMIC); |
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if (unlikely(err)) { |
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if (net_ratelimit()) { |
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dev_err(&ar->udev->dev, "tx submit failed (%d)\n", |
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urb->status); |
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} |
|
|
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usb_unanchor_urb(urb); |
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usb_anchor_urb(urb, &ar->tx_err); |
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} |
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|
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usb_free_urb(urb); |
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|
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if (likely(err == 0)) |
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return; |
|
|
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err_acc: |
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atomic_dec(&ar->tx_anch_urbs); |
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} |
|
|
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static void carl9170_usb_tx_data_complete(struct urb *urb) |
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{ |
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struct ar9170 *ar = usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0)); |
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|
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if (WARN_ON_ONCE(!ar)) { |
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dev_kfree_skb_irq(urb->context); |
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return; |
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} |
|
|
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atomic_dec(&ar->tx_anch_urbs); |
|
|
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switch (urb->status) { |
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/* everything is fine */ |
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case 0: |
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carl9170_tx_callback(ar, (void *)urb->context); |
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break; |
|
|
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/* disconnect */ |
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case -ENOENT: |
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case -ECONNRESET: |
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case -ENODEV: |
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case -ESHUTDOWN: |
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/* |
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* Defer the frame clean-up to the tasklet worker. |
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* This is necessary, because carl9170_tx_drop |
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* does not work in an irqsave context. |
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*/ |
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usb_anchor_urb(urb, &ar->tx_err); |
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return; |
|
|
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/* a random transmission error has occurred? */ |
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default: |
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if (net_ratelimit()) { |
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dev_err(&ar->udev->dev, "tx failed (%d)\n", |
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urb->status); |
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} |
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|
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usb_anchor_urb(urb, &ar->tx_err); |
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break; |
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} |
|
|
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if (likely(IS_STARTED(ar))) |
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carl9170_usb_submit_data_urb(ar); |
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} |
|
|
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static int carl9170_usb_submit_cmd_urb(struct ar9170 *ar) |
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{ |
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struct urb *urb; |
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int err; |
|
|
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if (atomic_inc_return(&ar->tx_cmd_urbs) != 1) { |
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atomic_dec(&ar->tx_cmd_urbs); |
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return 0; |
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} |
|
|
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urb = usb_get_from_anchor(&ar->tx_cmd); |
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if (!urb) { |
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atomic_dec(&ar->tx_cmd_urbs); |
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return 0; |
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} |
|
|
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usb_anchor_urb(urb, &ar->tx_anch); |
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err = usb_submit_urb(urb, GFP_ATOMIC); |
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if (unlikely(err)) { |
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usb_unanchor_urb(urb); |
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atomic_dec(&ar->tx_cmd_urbs); |
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} |
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usb_free_urb(urb); |
|
|
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return err; |
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} |
|
|
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static void carl9170_usb_cmd_complete(struct urb *urb) |
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{ |
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struct ar9170 *ar = urb->context; |
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int err = 0; |
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|
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if (WARN_ON_ONCE(!ar)) |
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return; |
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|
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atomic_dec(&ar->tx_cmd_urbs); |
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|
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switch (urb->status) { |
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/* everything is fine */ |
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case 0: |
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break; |
|
|
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/* disconnect */ |
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case -ENOENT: |
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case -ECONNRESET: |
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case -ENODEV: |
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case -ESHUTDOWN: |
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return; |
|
|
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default: |
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err = urb->status; |
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break; |
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} |
|
|
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if (!IS_INITIALIZED(ar)) |
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return; |
|
|
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if (err) |
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dev_err(&ar->udev->dev, "submit cmd cb failed (%d).\n", err); |
|
|
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err = carl9170_usb_submit_cmd_urb(ar); |
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if (err) |
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dev_err(&ar->udev->dev, "submit cmd failed (%d).\n", err); |
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} |
|
|
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static void carl9170_usb_rx_irq_complete(struct urb *urb) |
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{ |
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struct ar9170 *ar = urb->context; |
|
|
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if (WARN_ON_ONCE(!ar)) |
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return; |
|
|
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switch (urb->status) { |
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/* everything is fine */ |
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case 0: |
|
break; |
|
|
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/* disconnect */ |
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case -ENOENT: |
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case -ECONNRESET: |
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case -ENODEV: |
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case -ESHUTDOWN: |
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return; |
|
|
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default: |
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goto resubmit; |
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} |
|
|
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/* |
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* While the carl9170 firmware does not use this EP, the |
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* firmware loader in the EEPROM unfortunately does. |
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* Therefore we need to be ready to handle out-of-band |
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* responses and traps in case the firmware crashed and |
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* the loader took over again. |
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*/ |
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carl9170_handle_command_response(ar, urb->transfer_buffer, |
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urb->actual_length); |
|
|
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resubmit: |
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usb_anchor_urb(urb, &ar->rx_anch); |
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if (unlikely(usb_submit_urb(urb, GFP_ATOMIC))) |
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usb_unanchor_urb(urb); |
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} |
|
|
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static int carl9170_usb_submit_rx_urb(struct ar9170 *ar, gfp_t gfp) |
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{ |
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struct urb *urb; |
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int err = 0, runs = 0; |
|
|
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while ((atomic_read(&ar->rx_anch_urbs) < AR9170_NUM_RX_URBS) && |
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(runs++ < AR9170_NUM_RX_URBS)) { |
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err = -ENOSPC; |
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urb = usb_get_from_anchor(&ar->rx_pool); |
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if (urb) { |
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usb_anchor_urb(urb, &ar->rx_anch); |
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err = usb_submit_urb(urb, gfp); |
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if (unlikely(err)) { |
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usb_unanchor_urb(urb); |
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usb_anchor_urb(urb, &ar->rx_pool); |
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} else { |
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atomic_dec(&ar->rx_pool_urbs); |
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atomic_inc(&ar->rx_anch_urbs); |
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} |
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usb_free_urb(urb); |
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} |
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} |
|
|
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return err; |
|
} |
|
|
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static void carl9170_usb_rx_work(struct ar9170 *ar) |
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{ |
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struct urb *urb; |
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int i; |
|
|
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for (i = 0; i < AR9170_NUM_RX_URBS_POOL; i++) { |
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urb = usb_get_from_anchor(&ar->rx_work); |
|
if (!urb) |
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break; |
|
|
|
atomic_dec(&ar->rx_work_urbs); |
|
if (IS_INITIALIZED(ar)) { |
|
carl9170_rx(ar, urb->transfer_buffer, |
|
urb->actual_length); |
|
} |
|
|
|
usb_anchor_urb(urb, &ar->rx_pool); |
|
atomic_inc(&ar->rx_pool_urbs); |
|
|
|
usb_free_urb(urb); |
|
|
|
carl9170_usb_submit_rx_urb(ar, GFP_ATOMIC); |
|
} |
|
} |
|
|
|
void carl9170_usb_handle_tx_err(struct ar9170 *ar) |
|
{ |
|
struct urb *urb; |
|
|
|
while ((urb = usb_get_from_anchor(&ar->tx_err))) { |
|
struct sk_buff *skb = (void *)urb->context; |
|
|
|
carl9170_tx_drop(ar, skb); |
|
carl9170_tx_callback(ar, skb); |
|
usb_free_urb(urb); |
|
} |
|
} |
|
|
|
static void carl9170_usb_tasklet(struct tasklet_struct *t) |
|
{ |
|
struct ar9170 *ar = from_tasklet(ar, t, usb_tasklet); |
|
|
|
if (!IS_INITIALIZED(ar)) |
|
return; |
|
|
|
carl9170_usb_rx_work(ar); |
|
|
|
/* |
|
* Strictly speaking: The tx scheduler is not part of the USB system. |
|
* But the rx worker returns frames back to the mac80211-stack and |
|
* this is the _perfect_ place to generate the next transmissions. |
|
*/ |
|
if (IS_STARTED(ar)) |
|
carl9170_tx_scheduler(ar); |
|
} |
|
|
|
static void carl9170_usb_rx_complete(struct urb *urb) |
|
{ |
|
struct ar9170 *ar = (struct ar9170 *)urb->context; |
|
int err; |
|
|
|
if (WARN_ON_ONCE(!ar)) |
|
return; |
|
|
|
atomic_dec(&ar->rx_anch_urbs); |
|
|
|
switch (urb->status) { |
|
case 0: |
|
/* rx path */ |
|
usb_anchor_urb(urb, &ar->rx_work); |
|
atomic_inc(&ar->rx_work_urbs); |
|
break; |
|
|
|
case -ENOENT: |
|
case -ECONNRESET: |
|
case -ENODEV: |
|
case -ESHUTDOWN: |
|
/* handle disconnect events*/ |
|
return; |
|
|
|
default: |
|
/* handle all other errors */ |
|
usb_anchor_urb(urb, &ar->rx_pool); |
|
atomic_inc(&ar->rx_pool_urbs); |
|
break; |
|
} |
|
|
|
err = carl9170_usb_submit_rx_urb(ar, GFP_ATOMIC); |
|
if (unlikely(err)) { |
|
/* |
|
* usb_submit_rx_urb reported a problem. |
|
* In case this is due to a rx buffer shortage, |
|
* elevate the tasklet worker priority to |
|
* the highest available level. |
|
*/ |
|
tasklet_hi_schedule(&ar->usb_tasklet); |
|
|
|
if (atomic_read(&ar->rx_anch_urbs) == 0) { |
|
/* |
|
* The system is too slow to cope with |
|
* the enormous workload. We have simply |
|
* run out of active rx urbs and this |
|
* unfortunately leads to an unpredictable |
|
* device. |
|
*/ |
|
|
|
ieee80211_queue_work(ar->hw, &ar->ping_work); |
|
} |
|
} else { |
|
/* |
|
* Using anything less than _high_ priority absolutely |
|
* kills the rx performance my UP-System... |
|
*/ |
|
tasklet_hi_schedule(&ar->usb_tasklet); |
|
} |
|
} |
|
|
|
static struct urb *carl9170_usb_alloc_rx_urb(struct ar9170 *ar, gfp_t gfp) |
|
{ |
|
struct urb *urb; |
|
void *buf; |
|
|
|
buf = kmalloc(ar->fw.rx_size, gfp); |
|
if (!buf) |
|
return NULL; |
|
|
|
urb = usb_alloc_urb(0, gfp); |
|
if (!urb) { |
|
kfree(buf); |
|
return NULL; |
|
} |
|
|
|
usb_fill_bulk_urb(urb, ar->udev, usb_rcvbulkpipe(ar->udev, |
|
AR9170_USB_EP_RX), buf, ar->fw.rx_size, |
|
carl9170_usb_rx_complete, ar); |
|
|
|
urb->transfer_flags |= URB_FREE_BUFFER; |
|
|
|
return urb; |
|
} |
|
|
|
static int carl9170_usb_send_rx_irq_urb(struct ar9170 *ar) |
|
{ |
|
struct urb *urb = NULL; |
|
void *ibuf; |
|
int err = -ENOMEM; |
|
|
|
urb = usb_alloc_urb(0, GFP_KERNEL); |
|
if (!urb) |
|
goto out; |
|
|
|
ibuf = kmalloc(AR9170_USB_EP_CTRL_MAX, GFP_KERNEL); |
|
if (!ibuf) |
|
goto out; |
|
|
|
usb_fill_int_urb(urb, ar->udev, usb_rcvintpipe(ar->udev, |
|
AR9170_USB_EP_IRQ), ibuf, AR9170_USB_EP_CTRL_MAX, |
|
carl9170_usb_rx_irq_complete, ar, 1); |
|
|
|
urb->transfer_flags |= URB_FREE_BUFFER; |
|
|
|
usb_anchor_urb(urb, &ar->rx_anch); |
|
err = usb_submit_urb(urb, GFP_KERNEL); |
|
if (err) |
|
usb_unanchor_urb(urb); |
|
|
|
out: |
|
usb_free_urb(urb); |
|
return err; |
|
} |
|
|
|
static int carl9170_usb_init_rx_bulk_urbs(struct ar9170 *ar) |
|
{ |
|
struct urb *urb; |
|
int i, err = -EINVAL; |
|
|
|
/* |
|
* The driver actively maintains a second shadow |
|
* pool for inactive, but fully-prepared rx urbs. |
|
* |
|
* The pool should help the driver to master huge |
|
* workload spikes without running the risk of |
|
* undersupplying the hardware or wasting time by |
|
* processing rx data (streams) inside the urb |
|
* completion (hardirq context). |
|
*/ |
|
for (i = 0; i < AR9170_NUM_RX_URBS_POOL; i++) { |
|
urb = carl9170_usb_alloc_rx_urb(ar, GFP_KERNEL); |
|
if (!urb) { |
|
err = -ENOMEM; |
|
goto err_out; |
|
} |
|
|
|
usb_anchor_urb(urb, &ar->rx_pool); |
|
atomic_inc(&ar->rx_pool_urbs); |
|
usb_free_urb(urb); |
|
} |
|
|
|
err = carl9170_usb_submit_rx_urb(ar, GFP_KERNEL); |
|
if (err) |
|
goto err_out; |
|
|
|
/* the device now waiting for the firmware. */ |
|
carl9170_set_state_when(ar, CARL9170_STOPPED, CARL9170_IDLE); |
|
return 0; |
|
|
|
err_out: |
|
|
|
usb_scuttle_anchored_urbs(&ar->rx_pool); |
|
usb_scuttle_anchored_urbs(&ar->rx_work); |
|
usb_kill_anchored_urbs(&ar->rx_anch); |
|
return err; |
|
} |
|
|
|
static int carl9170_usb_flush(struct ar9170 *ar) |
|
{ |
|
struct urb *urb; |
|
int ret, err = 0; |
|
|
|
while ((urb = usb_get_from_anchor(&ar->tx_wait))) { |
|
struct sk_buff *skb = (void *)urb->context; |
|
carl9170_tx_drop(ar, skb); |
|
carl9170_tx_callback(ar, skb); |
|
usb_free_urb(urb); |
|
} |
|
|
|
ret = usb_wait_anchor_empty_timeout(&ar->tx_cmd, 1000); |
|
if (ret == 0) |
|
err = -ETIMEDOUT; |
|
|
|
/* lets wait a while until the tx - queues are dried out */ |
|
ret = usb_wait_anchor_empty_timeout(&ar->tx_anch, 1000); |
|
if (ret == 0) |
|
err = -ETIMEDOUT; |
|
|
|
usb_kill_anchored_urbs(&ar->tx_anch); |
|
carl9170_usb_handle_tx_err(ar); |
|
|
|
return err; |
|
} |
|
|
|
static void carl9170_usb_cancel_urbs(struct ar9170 *ar) |
|
{ |
|
int err; |
|
|
|
carl9170_set_state(ar, CARL9170_UNKNOWN_STATE); |
|
|
|
err = carl9170_usb_flush(ar); |
|
if (err) |
|
dev_err(&ar->udev->dev, "stuck tx urbs!\n"); |
|
|
|
usb_poison_anchored_urbs(&ar->tx_anch); |
|
carl9170_usb_handle_tx_err(ar); |
|
usb_poison_anchored_urbs(&ar->rx_anch); |
|
|
|
tasklet_kill(&ar->usb_tasklet); |
|
|
|
usb_scuttle_anchored_urbs(&ar->rx_work); |
|
usb_scuttle_anchored_urbs(&ar->rx_pool); |
|
usb_scuttle_anchored_urbs(&ar->tx_cmd); |
|
} |
|
|
|
int __carl9170_exec_cmd(struct ar9170 *ar, struct carl9170_cmd *cmd, |
|
const bool free_buf) |
|
{ |
|
struct urb *urb; |
|
int err = 0; |
|
|
|
if (!IS_INITIALIZED(ar)) { |
|
err = -EPERM; |
|
goto err_free; |
|
} |
|
|
|
if (WARN_ON(cmd->hdr.len > CARL9170_MAX_CMD_LEN - 4)) { |
|
err = -EINVAL; |
|
goto err_free; |
|
} |
|
|
|
urb = usb_alloc_urb(0, GFP_ATOMIC); |
|
if (!urb) { |
|
err = -ENOMEM; |
|
goto err_free; |
|
} |
|
|
|
if (ar->usb_ep_cmd_is_bulk) |
|
usb_fill_bulk_urb(urb, ar->udev, |
|
usb_sndbulkpipe(ar->udev, AR9170_USB_EP_CMD), |
|
cmd, cmd->hdr.len + 4, |
|
carl9170_usb_cmd_complete, ar); |
|
else |
|
usb_fill_int_urb(urb, ar->udev, |
|
usb_sndintpipe(ar->udev, AR9170_USB_EP_CMD), |
|
cmd, cmd->hdr.len + 4, |
|
carl9170_usb_cmd_complete, ar, 1); |
|
|
|
if (free_buf) |
|
urb->transfer_flags |= URB_FREE_BUFFER; |
|
|
|
usb_anchor_urb(urb, &ar->tx_cmd); |
|
usb_free_urb(urb); |
|
|
|
return carl9170_usb_submit_cmd_urb(ar); |
|
|
|
err_free: |
|
if (free_buf) |
|
kfree(cmd); |
|
|
|
return err; |
|
} |
|
|
|
int carl9170_exec_cmd(struct ar9170 *ar, const enum carl9170_cmd_oids cmd, |
|
unsigned int plen, void *payload, unsigned int outlen, void *out) |
|
{ |
|
int err = -ENOMEM; |
|
unsigned long time_left; |
|
|
|
if (!IS_ACCEPTING_CMD(ar)) |
|
return -EIO; |
|
|
|
if (!(cmd & CARL9170_CMD_ASYNC_FLAG)) |
|
might_sleep(); |
|
|
|
ar->cmd.hdr.len = plen; |
|
ar->cmd.hdr.cmd = cmd; |
|
/* writing multiple regs fills this buffer already */ |
|
if (plen && payload != (u8 *)(ar->cmd.data)) |
|
memcpy(ar->cmd.data, payload, plen); |
|
|
|
spin_lock_bh(&ar->cmd_lock); |
|
ar->readbuf = (u8 *)out; |
|
ar->readlen = outlen; |
|
spin_unlock_bh(&ar->cmd_lock); |
|
|
|
reinit_completion(&ar->cmd_wait); |
|
err = __carl9170_exec_cmd(ar, &ar->cmd, false); |
|
|
|
if (!(cmd & CARL9170_CMD_ASYNC_FLAG)) { |
|
time_left = wait_for_completion_timeout(&ar->cmd_wait, HZ); |
|
if (time_left == 0) { |
|
err = -ETIMEDOUT; |
|
goto err_unbuf; |
|
} |
|
|
|
if (ar->readlen != outlen) { |
|
err = -EMSGSIZE; |
|
goto err_unbuf; |
|
} |
|
} |
|
|
|
return 0; |
|
|
|
err_unbuf: |
|
/* Maybe the device was removed in the moment we were waiting? */ |
|
if (IS_STARTED(ar)) { |
|
dev_err(&ar->udev->dev, "no command feedback " |
|
"received (%d).\n", err); |
|
|
|
/* provide some maybe useful debug information */ |
|
print_hex_dump_bytes("carl9170 cmd: ", DUMP_PREFIX_NONE, |
|
&ar->cmd, plen + 4); |
|
|
|
carl9170_restart(ar, CARL9170_RR_COMMAND_TIMEOUT); |
|
} |
|
|
|
/* invalidate to avoid completing the next command prematurely */ |
|
spin_lock_bh(&ar->cmd_lock); |
|
ar->readbuf = NULL; |
|
ar->readlen = 0; |
|
spin_unlock_bh(&ar->cmd_lock); |
|
|
|
return err; |
|
} |
|
|
|
void carl9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb) |
|
{ |
|
struct urb *urb; |
|
struct ar9170_stream *tx_stream; |
|
void *data; |
|
unsigned int len; |
|
|
|
if (!IS_STARTED(ar)) |
|
goto err_drop; |
|
|
|
urb = usb_alloc_urb(0, GFP_ATOMIC); |
|
if (!urb) |
|
goto err_drop; |
|
|
|
if (ar->fw.tx_stream) { |
|
tx_stream = (void *) (skb->data - sizeof(*tx_stream)); |
|
|
|
len = skb->len + sizeof(*tx_stream); |
|
tx_stream->length = cpu_to_le16(len); |
|
tx_stream->tag = cpu_to_le16(AR9170_TX_STREAM_TAG); |
|
data = tx_stream; |
|
} else { |
|
data = skb->data; |
|
len = skb->len; |
|
} |
|
|
|
usb_fill_bulk_urb(urb, ar->udev, usb_sndbulkpipe(ar->udev, |
|
AR9170_USB_EP_TX), data, len, |
|
carl9170_usb_tx_data_complete, skb); |
|
|
|
urb->transfer_flags |= URB_ZERO_PACKET; |
|
|
|
usb_anchor_urb(urb, &ar->tx_wait); |
|
|
|
usb_free_urb(urb); |
|
|
|
carl9170_usb_submit_data_urb(ar); |
|
return; |
|
|
|
err_drop: |
|
carl9170_tx_drop(ar, skb); |
|
carl9170_tx_callback(ar, skb); |
|
} |
|
|
|
static void carl9170_release_firmware(struct ar9170 *ar) |
|
{ |
|
if (ar->fw.fw) { |
|
release_firmware(ar->fw.fw); |
|
memset(&ar->fw, 0, sizeof(ar->fw)); |
|
} |
|
} |
|
|
|
void carl9170_usb_stop(struct ar9170 *ar) |
|
{ |
|
int ret; |
|
|
|
carl9170_set_state_when(ar, CARL9170_IDLE, CARL9170_STOPPED); |
|
|
|
ret = carl9170_usb_flush(ar); |
|
if (ret) |
|
dev_err(&ar->udev->dev, "kill pending tx urbs.\n"); |
|
|
|
usb_poison_anchored_urbs(&ar->tx_anch); |
|
carl9170_usb_handle_tx_err(ar); |
|
|
|
/* kill any pending command */ |
|
spin_lock_bh(&ar->cmd_lock); |
|
ar->readlen = 0; |
|
spin_unlock_bh(&ar->cmd_lock); |
|
complete(&ar->cmd_wait); |
|
|
|
/* |
|
* 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... |
|
*/ |
|
} |
|
|
|
int carl9170_usb_open(struct ar9170 *ar) |
|
{ |
|
usb_unpoison_anchored_urbs(&ar->tx_anch); |
|
|
|
carl9170_set_state_when(ar, CARL9170_STOPPED, CARL9170_IDLE); |
|
return 0; |
|
} |
|
|
|
static int carl9170_usb_load_firmware(struct ar9170 *ar) |
|
{ |
|
const u8 *data; |
|
u8 *buf; |
|
unsigned int transfer; |
|
size_t len; |
|
u32 addr; |
|
int err = 0; |
|
|
|
buf = kmalloc(4096, GFP_KERNEL); |
|
if (!buf) { |
|
err = -ENOMEM; |
|
goto err_out; |
|
} |
|
|
|
data = ar->fw.fw->data; |
|
len = ar->fw.fw->size; |
|
addr = ar->fw.address; |
|
|
|
/* this removes the miniboot image */ |
|
data += ar->fw.offset; |
|
len -= ar->fw.offset; |
|
|
|
while (len) { |
|
transfer = min_t(unsigned int, len, 4096u); |
|
memcpy(buf, data, transfer); |
|
|
|
err = usb_control_msg(ar->udev, usb_sndctrlpipe(ar->udev, 0), |
|
0x30 /* FW DL */, 0x40 | USB_DIR_OUT, |
|
addr >> 8, 0, buf, transfer, 100); |
|
|
|
if (err < 0) { |
|
kfree(buf); |
|
goto err_out; |
|
} |
|
|
|
len -= transfer; |
|
data += transfer; |
|
addr += transfer; |
|
} |
|
kfree(buf); |
|
|
|
err = usb_control_msg(ar->udev, usb_sndctrlpipe(ar->udev, 0), |
|
0x31 /* FW DL COMPLETE */, |
|
0x40 | USB_DIR_OUT, 0, 0, NULL, 0, 200); |
|
|
|
if (wait_for_completion_timeout(&ar->fw_boot_wait, HZ) == 0) { |
|
err = -ETIMEDOUT; |
|
goto err_out; |
|
} |
|
|
|
err = carl9170_echo_test(ar, 0x4a110123); |
|
if (err) |
|
goto err_out; |
|
|
|
/* now, start the command response counter */ |
|
ar->cmd_seq = -1; |
|
|
|
return 0; |
|
|
|
err_out: |
|
dev_err(&ar->udev->dev, "firmware upload failed (%d).\n", err); |
|
return err; |
|
} |
|
|
|
int carl9170_usb_restart(struct ar9170 *ar) |
|
{ |
|
int err = 0; |
|
|
|
if (ar->intf->condition != USB_INTERFACE_BOUND) |
|
return 0; |
|
|
|
/* |
|
* Disable the command response sequence counter check. |
|
* We already know that the device/firmware is in a bad state. |
|
* So, no extra points are awarded to anyone who reminds the |
|
* driver about that. |
|
*/ |
|
ar->cmd_seq = -2; |
|
|
|
err = carl9170_reboot(ar); |
|
|
|
carl9170_usb_stop(ar); |
|
|
|
if (err) |
|
goto err_out; |
|
|
|
tasklet_schedule(&ar->usb_tasklet); |
|
|
|
/* The reboot procedure can take quite a while to complete. */ |
|
msleep(1100); |
|
|
|
err = carl9170_usb_open(ar); |
|
if (err) |
|
goto err_out; |
|
|
|
err = carl9170_usb_load_firmware(ar); |
|
if (err) |
|
goto err_out; |
|
|
|
return 0; |
|
|
|
err_out: |
|
carl9170_usb_cancel_urbs(ar); |
|
return err; |
|
} |
|
|
|
void carl9170_usb_reset(struct ar9170 *ar) |
|
{ |
|
/* |
|
* This is the last resort to get the device going again |
|
* without any *user replugging action*. |
|
* |
|
* But there is a catch: usb_reset really is like a physical |
|
* *reconnect*. The mac80211 state will be lost in the process. |
|
* Therefore a userspace application, which is monitoring |
|
* the link must step in. |
|
*/ |
|
carl9170_usb_cancel_urbs(ar); |
|
|
|
carl9170_usb_stop(ar); |
|
|
|
usb_queue_reset_device(ar->intf); |
|
} |
|
|
|
static int carl9170_usb_init_device(struct ar9170 *ar) |
|
{ |
|
int err; |
|
|
|
/* |
|
* The carl9170 firmware let's the driver know when it's |
|
* ready for action. But we have to be prepared to gracefully |
|
* handle all spurious [flushed] messages after each (re-)boot. |
|
* Thus the command response counter remains disabled until it |
|
* can be safely synchronized. |
|
*/ |
|
ar->cmd_seq = -2; |
|
|
|
err = carl9170_usb_send_rx_irq_urb(ar); |
|
if (err) |
|
goto err_out; |
|
|
|
err = carl9170_usb_init_rx_bulk_urbs(ar); |
|
if (err) |
|
goto err_unrx; |
|
|
|
err = carl9170_usb_open(ar); |
|
if (err) |
|
goto err_unrx; |
|
|
|
mutex_lock(&ar->mutex); |
|
err = carl9170_usb_load_firmware(ar); |
|
mutex_unlock(&ar->mutex); |
|
if (err) |
|
goto err_stop; |
|
|
|
return 0; |
|
|
|
err_stop: |
|
carl9170_usb_stop(ar); |
|
|
|
err_unrx: |
|
carl9170_usb_cancel_urbs(ar); |
|
|
|
err_out: |
|
return err; |
|
} |
|
|
|
static void carl9170_usb_firmware_failed(struct ar9170 *ar) |
|
{ |
|
/* Store a copies of the usb_interface and usb_device pointer locally. |
|
* This is because release_driver initiates carl9170_usb_disconnect, |
|
* which in turn frees our driver context (ar). |
|
*/ |
|
struct usb_interface *intf = ar->intf; |
|
struct usb_device *udev = ar->udev; |
|
|
|
complete(&ar->fw_load_wait); |
|
/* at this point 'ar' could be already freed. Don't use it anymore */ |
|
ar = NULL; |
|
|
|
/* unbind anything failed */ |
|
usb_lock_device(udev); |
|
usb_driver_release_interface(&carl9170_driver, intf); |
|
usb_unlock_device(udev); |
|
|
|
usb_put_intf(intf); |
|
} |
|
|
|
static void carl9170_usb_firmware_finish(struct ar9170 *ar) |
|
{ |
|
struct usb_interface *intf = ar->intf; |
|
int err; |
|
|
|
err = carl9170_parse_firmware(ar); |
|
if (err) |
|
goto err_freefw; |
|
|
|
err = carl9170_usb_init_device(ar); |
|
if (err) |
|
goto err_freefw; |
|
|
|
err = carl9170_register(ar); |
|
|
|
carl9170_usb_stop(ar); |
|
if (err) |
|
goto err_unrx; |
|
|
|
complete(&ar->fw_load_wait); |
|
usb_put_intf(intf); |
|
return; |
|
|
|
err_unrx: |
|
carl9170_usb_cancel_urbs(ar); |
|
|
|
err_freefw: |
|
carl9170_release_firmware(ar); |
|
carl9170_usb_firmware_failed(ar); |
|
} |
|
|
|
static void carl9170_usb_firmware_step2(const struct firmware *fw, |
|
void *context) |
|
{ |
|
struct ar9170 *ar = context; |
|
|
|
if (fw) { |
|
ar->fw.fw = fw; |
|
carl9170_usb_firmware_finish(ar); |
|
return; |
|
} |
|
|
|
dev_err(&ar->udev->dev, "firmware not found.\n"); |
|
carl9170_usb_firmware_failed(ar); |
|
} |
|
|
|
static int carl9170_usb_probe(struct usb_interface *intf, |
|
const struct usb_device_id *id) |
|
{ |
|
struct usb_endpoint_descriptor *ep; |
|
struct ar9170 *ar; |
|
struct usb_device *udev; |
|
int i, err; |
|
|
|
err = usb_reset_device(interface_to_usbdev(intf)); |
|
if (err) |
|
return err; |
|
|
|
ar = carl9170_alloc(sizeof(*ar)); |
|
if (IS_ERR(ar)) |
|
return PTR_ERR(ar); |
|
|
|
udev = interface_to_usbdev(intf); |
|
ar->udev = udev; |
|
ar->intf = intf; |
|
ar->features = id->driver_info; |
|
|
|
/* We need to remember the type of endpoint 4 because it differs |
|
* between high- and full-speed configuration. The high-speed |
|
* configuration specifies it as interrupt and the full-speed |
|
* configuration as bulk endpoint. This information is required |
|
* later when sending urbs to that endpoint. |
|
*/ |
|
for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; ++i) { |
|
ep = &intf->cur_altsetting->endpoint[i].desc; |
|
|
|
if (usb_endpoint_num(ep) == AR9170_USB_EP_CMD && |
|
usb_endpoint_dir_out(ep) && |
|
usb_endpoint_type(ep) == USB_ENDPOINT_XFER_BULK) |
|
ar->usb_ep_cmd_is_bulk = true; |
|
} |
|
|
|
usb_set_intfdata(intf, ar); |
|
SET_IEEE80211_DEV(ar->hw, &intf->dev); |
|
|
|
init_usb_anchor(&ar->rx_anch); |
|
init_usb_anchor(&ar->rx_pool); |
|
init_usb_anchor(&ar->rx_work); |
|
init_usb_anchor(&ar->tx_wait); |
|
init_usb_anchor(&ar->tx_anch); |
|
init_usb_anchor(&ar->tx_cmd); |
|
init_usb_anchor(&ar->tx_err); |
|
init_completion(&ar->cmd_wait); |
|
init_completion(&ar->fw_boot_wait); |
|
init_completion(&ar->fw_load_wait); |
|
tasklet_setup(&ar->usb_tasklet, carl9170_usb_tasklet); |
|
|
|
atomic_set(&ar->tx_cmd_urbs, 0); |
|
atomic_set(&ar->tx_anch_urbs, 0); |
|
atomic_set(&ar->rx_work_urbs, 0); |
|
atomic_set(&ar->rx_anch_urbs, 0); |
|
atomic_set(&ar->rx_pool_urbs, 0); |
|
|
|
usb_get_intf(intf); |
|
|
|
carl9170_set_state(ar, CARL9170_STOPPED); |
|
|
|
err = request_firmware_nowait(THIS_MODULE, 1, CARL9170FW_NAME, |
|
&ar->udev->dev, GFP_KERNEL, ar, carl9170_usb_firmware_step2); |
|
if (err) { |
|
usb_put_intf(intf); |
|
carl9170_free(ar); |
|
} |
|
return err; |
|
} |
|
|
|
static void carl9170_usb_disconnect(struct usb_interface *intf) |
|
{ |
|
struct ar9170 *ar = usb_get_intfdata(intf); |
|
|
|
if (WARN_ON(!ar)) |
|
return; |
|
|
|
wait_for_completion(&ar->fw_load_wait); |
|
|
|
if (IS_INITIALIZED(ar)) { |
|
carl9170_reboot(ar); |
|
carl9170_usb_stop(ar); |
|
} |
|
|
|
carl9170_usb_cancel_urbs(ar); |
|
carl9170_unregister(ar); |
|
|
|
usb_set_intfdata(intf, NULL); |
|
|
|
carl9170_release_firmware(ar); |
|
carl9170_free(ar); |
|
} |
|
|
|
#ifdef CONFIG_PM |
|
static int carl9170_usb_suspend(struct usb_interface *intf, |
|
pm_message_t message) |
|
{ |
|
struct ar9170 *ar = usb_get_intfdata(intf); |
|
|
|
if (!ar) |
|
return -ENODEV; |
|
|
|
carl9170_usb_cancel_urbs(ar); |
|
|
|
return 0; |
|
} |
|
|
|
static int carl9170_usb_resume(struct usb_interface *intf) |
|
{ |
|
struct ar9170 *ar = usb_get_intfdata(intf); |
|
int err; |
|
|
|
if (!ar) |
|
return -ENODEV; |
|
|
|
usb_unpoison_anchored_urbs(&ar->rx_anch); |
|
carl9170_set_state(ar, CARL9170_STOPPED); |
|
|
|
/* |
|
* The USB documentation demands that [for suspend] all traffic |
|
* to and from the device has to stop. This would be fine, but |
|
* there's a catch: the device[usb phy] does not come back. |
|
* |
|
* Upon resume the firmware will "kill" itself and the |
|
* boot-code sorts out the magic voodoo. |
|
* Not very nice, but there's not much what could go wrong. |
|
*/ |
|
msleep(1100); |
|
|
|
err = carl9170_usb_init_device(ar); |
|
if (err) |
|
goto err_unrx; |
|
|
|
return 0; |
|
|
|
err_unrx: |
|
carl9170_usb_cancel_urbs(ar); |
|
|
|
return err; |
|
} |
|
#endif /* CONFIG_PM */ |
|
|
|
static struct usb_driver carl9170_driver = { |
|
.name = KBUILD_MODNAME, |
|
.probe = carl9170_usb_probe, |
|
.disconnect = carl9170_usb_disconnect, |
|
.id_table = carl9170_usb_ids, |
|
.soft_unbind = 1, |
|
#ifdef CONFIG_PM |
|
.suspend = carl9170_usb_suspend, |
|
.resume = carl9170_usb_resume, |
|
.reset_resume = carl9170_usb_resume, |
|
#endif /* CONFIG_PM */ |
|
.disable_hub_initiated_lpm = 1, |
|
}; |
|
|
|
module_usb_driver(carl9170_driver);
|
|
|