| /* |
| * 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("Johannes Berg <johannes@sipsolutions.net>"); |
| MODULE_AUTHOR("Christian Lamparter <chunkeey@web.de>"); |
| MODULE_LICENSE("GPL"); |
| MODULE_DESCRIPTION("Atheros AR9170 802.11n USB wireless"); |
| MODULE_FIRMWARE("ar9170.fw"); |
| MODULE_FIRMWARE("ar9170-1.fw"); |
| MODULE_FIRMWARE("ar9170-2.fw"); |
| |
| enum ar9170_requirements { |
| AR9170_REQ_FW1_ONLY = 1, |
| }; |
| |
| static struct usb_device_id ar9170_usb_ids[] = { |
| /* Atheros 9170 */ |
| { USB_DEVICE(0x0cf3, 0x9170) }, |
| /* Atheros TG121N */ |
| { USB_DEVICE(0x0cf3, 0x1001) }, |
| /* TP-Link TL-WN821N v2 */ |
| { USB_DEVICE(0x0cf3, 0x1002) }, |
| /* Cace Airpcap NX */ |
| { USB_DEVICE(0xcace, 0x0300) }, |
| /* D-Link DWA 160 A1 */ |
| { USB_DEVICE(0x07d1, 0x3c10) }, |
| /* D-Link DWA 160 A2 */ |
| { USB_DEVICE(0x07d1, 0x3a09) }, |
| /* Netgear WNDA3100 */ |
| { USB_DEVICE(0x0846, 0x9010) }, |
| /* Netgear WN111 v2 */ |
| { USB_DEVICE(0x0846, 0x9001) }, |
| /* Zydas ZD1221 */ |
| { USB_DEVICE(0x0ace, 0x1221) }, |
| /* ZyXEL NWD271N */ |
| { USB_DEVICE(0x0586, 0x3417) }, |
| /* Z-Com UB81 BG */ |
| { USB_DEVICE(0x0cde, 0x0023) }, |
| /* Z-Com UB82 ABG */ |
| { USB_DEVICE(0x0cde, 0x0026) }, |
| /* Sphairon Homelink 1202 */ |
| { USB_DEVICE(0x0cde, 0x0027) }, |
| /* Arcadyan WN7512 */ |
| { USB_DEVICE(0x083a, 0xf522) }, |
| /* Planex GWUS300 */ |
| { USB_DEVICE(0x2019, 0x5304) }, |
| /* IO-Data WNGDNUS2 */ |
| { USB_DEVICE(0x04bb, 0x093f) }, |
| /* AVM FRITZ!WLAN USB Stick N */ |
| { USB_DEVICE(0x057C, 0x8401) }, |
| /* AVM FRITZ!WLAN USB Stick N 2.4 */ |
| { USB_DEVICE(0x057C, 0x8402), .driver_info = AR9170_REQ_FW1_ONLY }, |
| |
| /* terminate */ |
| {} |
| }; |
| MODULE_DEVICE_TABLE(usb, ar9170_usb_ids); |
| |
| static void ar9170_usb_submit_urb(struct ar9170_usb *aru) |
| { |
| struct urb *urb; |
| unsigned long flags; |
| int err; |
| |
| if (unlikely(!IS_STARTED(&aru->common))) |
| return ; |
| |
| spin_lock_irqsave(&aru->tx_urb_lock, flags); |
| if (atomic_read(&aru->tx_submitted_urbs) >= AR9170_NUM_TX_URBS) { |
| spin_unlock_irqrestore(&aru->tx_urb_lock, flags); |
| return ; |
| } |
| atomic_inc(&aru->tx_submitted_urbs); |
| |
| urb = usb_get_from_anchor(&aru->tx_pending); |
| if (!urb) { |
| atomic_dec(&aru->tx_submitted_urbs); |
| spin_unlock_irqrestore(&aru->tx_urb_lock, flags); |
| |
| return ; |
| } |
| spin_unlock_irqrestore(&aru->tx_urb_lock, flags); |
| |
| aru->tx_pending_urbs--; |
| usb_anchor_urb(urb, &aru->tx_submitted); |
| |
| err = usb_submit_urb(urb, GFP_ATOMIC); |
| if (unlikely(err)) { |
| if (ar9170_nag_limiter(&aru->common)) |
| dev_err(&aru->udev->dev, "submit_urb failed (%d).\n", |
| err); |
| |
| usb_unanchor_urb(urb); |
| atomic_dec(&aru->tx_submitted_urbs); |
| ar9170_tx_callback(&aru->common, urb->context); |
| } |
| |
| usb_free_urb(urb); |
| } |
| |
| static void ar9170_usb_tx_urb_complete_frame(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 (unlikely(!aru)) { |
| dev_kfree_skb_irq(skb); |
| return ; |
| } |
| |
| atomic_dec(&aru->tx_submitted_urbs); |
| |
| ar9170_tx_callback(&aru->common, skb); |
| |
| ar9170_usb_submit_urb(aru); |
| } |
| |
| 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; |
| } |
| |
| ar9170_handle_command_response(&aru->common, 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 (unlikely(err)) { |
| usb_unanchor_urb(urb); |
| goto free; |
| } |
| |
| return ; |
| |
| free: |
| dev_kfree_skb_irq(skb); |
| } |
| |
| 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 int ar9170_usb_flush(struct ar9170 *ar) |
| { |
| struct ar9170_usb *aru = (void *) ar; |
| struct urb *urb; |
| int ret, err = 0; |
| |
| if (IS_STARTED(ar)) |
| aru->common.state = AR9170_IDLE; |
| |
| usb_wait_anchor_empty_timeout(&aru->tx_pending, |
| msecs_to_jiffies(800)); |
| while ((urb = usb_get_from_anchor(&aru->tx_pending))) { |
| ar9170_tx_callback(&aru->common, (void *) urb->context); |
| usb_free_urb(urb); |
| } |
| |
| /* lets wait a while until the tx - queues are dried out */ |
| ret = usb_wait_anchor_empty_timeout(&aru->tx_submitted, |
| msecs_to_jiffies(100)); |
| if (ret == 0) |
| err = -ETIMEDOUT; |
| |
| usb_kill_anchored_urbs(&aru->tx_submitted); |
| |
| if (IS_ACCEPTING_CMD(ar)) |
| aru->common.state = AR9170_STARTED; |
| |
| return err; |
| } |
| |
| static void ar9170_usb_cancel_urbs(struct ar9170_usb *aru) |
| { |
| int err; |
| |
| aru->common.state = AR9170_UNKNOWN_STATE; |
| |
| err = ar9170_usb_flush(&aru->common); |
| if (err) |
| dev_err(&aru->udev->dev, "stuck 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 (unlikely(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 (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) |
| { |
| struct ar9170_usb *aru = (struct ar9170_usb *) ar; |
| struct urb *urb; |
| |
| 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, |
| ar9170_usb_tx_urb_complete_frame, skb); |
| urb->transfer_flags |= URB_ZERO_PACKET; |
| |
| usb_anchor_urb(urb, &aru->tx_pending); |
| aru->tx_pending_urbs++; |
| |
| usb_free_urb(urb); |
| |
| ar9170_usb_submit_urb(aru); |
| return 0; |
| } |
| |
| 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 (unlikely(!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->firmware, "ar9170.fw", |
| &aru->udev->dev); |
| if (!err) { |
| aru->init_values = NULL; |
| return 0; |
| } |
| |
| if (aru->req_one_stage_fw) { |
| dev_err(&aru->udev->dev, "ar9170.fw firmware file " |
| "not found and is required for this device\n"); |
| return -EINVAL; |
| } |
| |
| dev_err(&aru->udev->dev, "ar9170.fw firmware file " |
| "not found, trying old firmware...\n"); |
| |
| 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; |
| |
| if (!aru->init_values) |
| goto upload_fw_start; |
| |
| /* 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; |
| } |
| |
| upload_fw_start: |
| |
| /* 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; |
| |
| ret = ar9170_usb_flush(ar); |
| if (ret) |
| 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_init_device(struct ar9170_usb *aru) |
| { |
| int err; |
| |
| err = ar9170_usb_alloc_rx_irq_urb(aru); |
| if (err) |
| goto err_out; |
| |
| 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; |
| } |
| } |
| |
| return 0; |
| |
| err_unrx: |
| ar9170_usb_cancel_urbs(aru); |
| |
| err_out: |
| return err; |
| } |
| |
| static bool ar9170_requires_one_stage(const struct usb_device_id *id) |
| { |
| if (!id->driver_info) |
| return false; |
| if (id->driver_info == AR9170_REQ_FW1_ONLY) |
| return true; |
| return false; |
| } |
| |
| 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; |
| |
| aru->req_one_stage_fw = ar9170_requires_one_stage(id); |
| |
| usb_set_intfdata(intf, aru); |
| SET_IEEE80211_DEV(ar->hw, &intf->dev); |
| |
| init_usb_anchor(&aru->rx_submitted); |
| init_usb_anchor(&aru->tx_pending); |
| init_usb_anchor(&aru->tx_submitted); |
| init_completion(&aru->cmd_wait); |
| spin_lock_init(&aru->tx_urb_lock); |
| |
| aru->tx_pending_urbs = 0; |
| atomic_set(&aru->tx_submitted_urbs, 0); |
| |
| aru->common.stop = ar9170_usb_stop; |
| aru->common.flush = ar9170_usb_flush; |
| 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; |
| |
| #ifdef CONFIG_PM |
| udev->reset_resume = 1; |
| #endif /* CONFIG_PM */ |
| err = ar9170_usb_reset(aru); |
| if (err) |
| goto err_freehw; |
| |
| err = ar9170_usb_request_firmware(aru); |
| if (err) |
| goto err_freehw; |
| |
| err = ar9170_usb_init_device(aru); |
| if (err) |
| goto err_freefw; |
| |
| 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_freehw: |
| 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); |
| } |
| |
| #ifdef CONFIG_PM |
| static int ar9170_suspend(struct usb_interface *intf, |
| pm_message_t message) |
| { |
| struct ar9170_usb *aru = usb_get_intfdata(intf); |
| |
| if (!aru) |
| return -ENODEV; |
| |
| aru->common.state = AR9170_IDLE; |
| ar9170_usb_cancel_urbs(aru); |
| |
| return 0; |
| } |
| |
| static int ar9170_resume(struct usb_interface *intf) |
| { |
| struct ar9170_usb *aru = usb_get_intfdata(intf); |
| int err; |
| |
| if (!aru) |
| return -ENODEV; |
| |
| usb_unpoison_anchored_urbs(&aru->rx_submitted); |
| usb_unpoison_anchored_urbs(&aru->tx_submitted); |
| |
| err = ar9170_usb_init_device(aru); |
| if (err) |
| goto err_unrx; |
| |
| err = ar9170_usb_open(&aru->common); |
| if (err) |
| goto err_unrx; |
| |
| return 0; |
| |
| err_unrx: |
| aru->common.state = AR9170_IDLE; |
| ar9170_usb_cancel_urbs(aru); |
| |
| return err; |
| } |
| #endif /* CONFIG_PM */ |
| |
| static struct usb_driver ar9170_driver = { |
| .name = "ar9170usb", |
| .probe = ar9170_usb_probe, |
| .disconnect = ar9170_usb_disconnect, |
| .id_table = ar9170_usb_ids, |
| .soft_unbind = 1, |
| #ifdef CONFIG_PM |
| .suspend = ar9170_suspend, |
| .resume = ar9170_resume, |
| .reset_resume = ar9170_resume, |
| #endif /* CONFIG_PM */ |
| }; |
| |
| 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); |