From 203c4805e91786f9a010bc7945a0fde70c9da28e Mon Sep 17 00:00:00 2001 From: "Luis R. Rodriguez" Date: Mon, 30 Mar 2009 22:30:33 -0400 Subject: atheros: put atheros wireless drivers into ath/ Signed-off-by: Luis R. Rodriguez Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ar9170/usb.c | 822 ++++++++++++++++++++++++++++++++++ 1 file changed, 822 insertions(+) create mode 100644 drivers/net/wireless/ath/ar9170/usb.c (limited to 'drivers/net/wireless/ath/ar9170/usb.c') diff --git a/drivers/net/wireless/ath/ar9170/usb.c b/drivers/net/wireless/ath/ar9170/usb.c new file mode 100644 index 000000000000..fddda477095c --- /dev/null +++ b/drivers/net/wireless/ath/ar9170/usb.c @@ -0,0 +1,822 @@ +/* + * Atheros AR9170 driver + * + * USB - frontend + * + * Copyright 2008, Johannes Berg + * Copyright 2009, Christian Lamparter + * + * 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 +#include +#include +#include +#include +#include "ar9170.h" +#include "cmd.h" +#include "hw.h" +#include "usb.h" + +MODULE_AUTHOR("Johannes Berg "); +MODULE_AUTHOR("Christian Lamparter "); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Atheros AR9170 802.11n USB wireless"); +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) }, + /* Cace Airpcap NX */ + { USB_DEVICE(0xcace, 0x0300) }, + /* 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) }, + /* ZyXEL NWD271N */ + { USB_DEVICE(0x0586, 0x3417) }, + /* 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_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 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_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); + + /* + * FIXME: firmware upload will fail on resume. + * but this is better than a hang! + */ + + 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, +#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); -- cgit v1.2.3 From 90ccda9baccec8223ca5456fbe49adf7264d1543 Mon Sep 17 00:00:00 2001 From: Christian Lamparter Date: Sat, 25 Apr 2009 21:32:09 +0200 Subject: ar9170usb: reset device on resume This patch takes care of an outstanding comment in "[PATCH] ar9170usb: fix hang on resume" commit message. >However, the device does not accept the firmware on resume. >and it will exit with: > >> firmware part 1 upload failed (-71). >> device is in a bad state. please reconnect it! Reported-by: Johannes Berg Signed-off-by: Christian Lamparter Tested-by: Johannes Berg Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ar9170/usb.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/net/wireless/ath/ar9170/usb.c') diff --git a/drivers/net/wireless/ath/ar9170/usb.c b/drivers/net/wireless/ath/ar9170/usb.c index fddda477095c..368fc2d42641 100644 --- a/drivers/net/wireless/ath/ar9170/usb.c +++ b/drivers/net/wireless/ath/ar9170/usb.c @@ -689,6 +689,7 @@ static int ar9170_usb_probe(struct usb_interface *intf, aru->common.exec_cmd = ar9170_usb_exec_cmd; aru->common.callback_cmd = ar9170_usb_callback_cmd; + udev->reset_resume = 1; err = ar9170_usb_reset(aru); if (err) goto err_freehw; @@ -805,6 +806,7 @@ static struct usb_driver ar9170_driver = { #ifdef CONFIG_PM .suspend = ar9170_suspend, .resume = ar9170_resume, + .reset_resume = ar9170_resume, #endif /* CONFIG_PM */ }; -- cgit v1.2.3 From ba5101d098d6a8471d1a3147fb610b2ee3dbb397 Mon Sep 17 00:00:00 2001 From: Roel Kluin Date: Sun, 26 Apr 2009 14:40:59 +0200 Subject: ar9170: wrong test on outlen in ar9170_usb_exec_cmd() ? remove redundant test: outlen is unsigned Signed-off-by: Roel Kluin Acked-by: Christian Lamparter Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ar9170/usb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/net/wireless/ath/ar9170/usb.c') diff --git a/drivers/net/wireless/ath/ar9170/usb.c b/drivers/net/wireless/ath/ar9170/usb.c index 368fc2d42641..d7b562dcebd2 100644 --- a/drivers/net/wireless/ath/ar9170/usb.c +++ b/drivers/net/wireless/ath/ar9170/usb.c @@ -350,7 +350,7 @@ static int ar9170_usb_exec_cmd(struct ar9170 *ar, enum ar9170_cmd cmd, goto err_unbuf; } - if (outlen >= 0 && aru->readlen != outlen) { + if (aru->readlen != outlen) { err = -EMSGSIZE; goto err_unbuf; } -- cgit v1.2.3 From 8a7130404948b966e98b1285e777972b4b3f2fa2 Mon Sep 17 00:00:00 2001 From: Alexander Beregalov Date: Mon, 4 May 2009 20:46:25 +0400 Subject: ar9170: fix build when !CONFIG_PM Fix this build error when CONFIG_PM is not set: drivers/net/wireless/ath/ar9170/usb.c: In function 'ar9170_usb_probe': drivers/net/wireless/ath/ar9170/usb.c:692: error: 'struct usb_device' has no member named 'reset_resume' Signed-off-by: Alexander Beregalov Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ar9170/usb.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/net/wireless/ath/ar9170/usb.c') diff --git a/drivers/net/wireless/ath/ar9170/usb.c b/drivers/net/wireless/ath/ar9170/usb.c index d7b562dcebd2..d7c13c0177ca 100644 --- a/drivers/net/wireless/ath/ar9170/usb.c +++ b/drivers/net/wireless/ath/ar9170/usb.c @@ -689,7 +689,9 @@ static int ar9170_usb_probe(struct usb_interface *intf, aru->common.exec_cmd = ar9170_usb_exec_cmd; aru->common.callback_cmd = ar9170_usb_callback_cmd; +#ifdef CONFIG_PM udev->reset_resume = 1; +#endif err = ar9170_usb_reset(aru); if (err) goto err_freehw; -- cgit v1.2.3 From c768b58d62d3106f0f670d35d1e7820c14ba769a Mon Sep 17 00:00:00 2001 From: "Luis R. Rodriguez" Date: Thu, 28 May 2009 17:36:04 -0400 Subject: ar9170: add support for 1-stage firmware You can get the stage 1 firmware from here: http://www.kernel.org/pub/linux/kernel/people/mcgrof/firmware/ar9170/ar9170.fw md5sum: 34feec4ec0eae3bb92c7c1ea2dfb4530 sha1sum: 6e5250498b815c2940d97242de31e054ae44e079 Its license: http://www.kernel.org/pub/linux/kernel/people/mcgrof/firmware/ar9170/LICENSE This is a new firmware, tested with WNDA3100. Cc: Peter Grabienski Cc: Stephen Chen Cc: Michael Fortin Cc: Johnny Cheng Cc: Yuan-Gu Wei Cc: Joerg Albert Signed-off-by: Luis R. Rodriguez Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ar9170/usb.c | 22 +++++++++++++++++----- 1 file changed, 17 insertions(+), 5 deletions(-) (limited to 'drivers/net/wireless/ath/ar9170/usb.c') diff --git a/drivers/net/wireless/ath/ar9170/usb.c b/drivers/net/wireless/ath/ar9170/usb.c index d7c13c0177ca..3c97c0985e2a 100644 --- a/drivers/net/wireless/ath/ar9170/usb.c +++ b/drivers/net/wireless/ath/ar9170/usb.c @@ -51,6 +51,7 @@ MODULE_AUTHOR("Johannes Berg "); MODULE_AUTHOR("Christian Lamparter "); 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"); @@ -504,17 +505,23 @@ static int ar9170_usb_request_firmware(struct ar9170_usb *aru) { int err = 0; - err = request_firmware(&aru->init_values, "ar9170-1.fw", + err = request_firmware(&aru->firmware, "ar9170.fw", &aru->udev->dev); - if (err) { - dev_err(&aru->udev->dev, "file with init values not found.\n"); - return err; + if (!err) { + aru->init_values = NULL; + return 0; } + 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); + 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"); + dev_err(&aru->udev->dev, "file with init values not found.\n"); return err; } @@ -548,6 +555,9 @@ 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); @@ -557,6 +567,8 @@ static int ar9170_usb_upload_firmware(struct ar9170_usb *aru) 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); -- cgit v1.2.3 From bdf6d32f933bf28dfdca325281ee5266c753dc67 Mon Sep 17 00:00:00 2001 From: "Luis R. Rodriguez" Date: Thu, 28 May 2009 17:36:05 -0400 Subject: ar9170: add AVM FRITZ devices This adds: USB 0x057C:0x8401 AVM FRITZ!WLAN USB Stick N USB 0x057C:0x8402 AVM FRITZ!WLAN USB Stick N 2.4 These devices require the 1-stage firmware, if not present we don't continue. Cc: Peter Grabienski Cc: Stephen Chen Cc: Michael Fortin Cc: Johnny Cheng Cc: Yuan-Gu Wei Cc: Joerg Albert Signed-off-by: Luis R. Rodriguez Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ar9170/usb.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'drivers/net/wireless/ath/ar9170/usb.c') diff --git a/drivers/net/wireless/ath/ar9170/usb.c b/drivers/net/wireless/ath/ar9170/usb.c index 3c97c0985e2a..71579e4d2fce 100644 --- a/drivers/net/wireless/ath/ar9170/usb.c +++ b/drivers/net/wireless/ath/ar9170/usb.c @@ -55,6 +55,10 @@ 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) }, @@ -82,6 +86,10 @@ static struct usb_device_id ar9170_usb_ids[] = { { 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 */ {} @@ -512,6 +520,12 @@ static int ar9170_usb_request_firmware(struct ar9170_usb *aru) 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"); @@ -668,6 +682,15 @@ 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) { @@ -688,6 +711,8 @@ static int ar9170_usb_probe(struct usb_interface *intf, 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, &udev->dev); -- cgit v1.2.3 From 66d008139c61d610f3ade9b46ad610e2cd277fb9 Mon Sep 17 00:00:00 2001 From: Christian Lamparter Date: Thu, 28 May 2009 17:04:27 +0200 Subject: ar9170usb: more minor fixes This patch contains a few more mostly random fixes for the USB front-end. 1. handle irq command response, instead of printing it to the console. 2. remove fixed FIXME. (real fix: "ar9170usb: reset device on resume". ) 3. some more one-liner. - get rid of a useless "return;" - add a few branch prediction hints in hot-paths etc. Signed-off-by: Christian Lamparter Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ar9170/usb.c | 22 ++++++++-------------- 1 file changed, 8 insertions(+), 14 deletions(-) (limited to 'drivers/net/wireless/ath/ar9170/usb.c') diff --git a/drivers/net/wireless/ath/ar9170/usb.c b/drivers/net/wireless/ath/ar9170/usb.c index 71579e4d2fce..f752698669d2 100644 --- a/drivers/net/wireless/ath/ar9170/usb.c +++ b/drivers/net/wireless/ath/ar9170/usb.c @@ -102,7 +102,7 @@ static void ar9170_usb_tx_urb_complete_free(struct urb *urb) struct ar9170_usb *aru = (struct ar9170_usb *) usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0)); - if (!aru) { + if (unlikely(!aru)) { dev_kfree_skb_irq(skb); return ; } @@ -135,8 +135,8 @@ static void ar9170_usb_irq_completed(struct urb *urb) goto resubmit; } - print_hex_dump_bytes("ar9170 irq: ", DUMP_PREFIX_OFFSET, - urb->transfer_buffer, urb->actual_length); + ar9170_handle_command_response(&aru->common, urb->transfer_buffer, + urb->actual_length); resubmit: usb_anchor_urb(urb, &aru->rx_submitted); @@ -186,16 +186,15 @@ resubmit: usb_anchor_urb(urb, &aru->rx_submitted); err = usb_submit_urb(urb, GFP_ATOMIC); - if (err) { + if (unlikely(err)) { usb_unanchor_urb(urb); - dev_kfree_skb_irq(skb); + goto free; } return ; free: dev_kfree_skb_irq(skb); - return; } static int ar9170_usb_prep_rx_urb(struct ar9170_usb *aru, @@ -346,7 +345,7 @@ static int ar9170_usb_exec_cmd(struct ar9170 *ar, enum ar9170_cmd cmd, usb_anchor_urb(urb, &aru->tx_submitted); err = usb_submit_urb(urb, GFP_ATOMIC); - if (err) { + if (unlikely(err)) { usb_unanchor_urb(urb); usb_free_urb(urb); goto err_unbuf; @@ -427,7 +426,7 @@ static void ar9170_usb_callback_cmd(struct ar9170 *ar, u32 len , void *buffer) unsigned long flags; u32 in, out; - if (!buffer) + if (unlikely(!buffer)) return ; in = le32_to_cpup((__le32 *)buffer); @@ -728,7 +727,7 @@ static int ar9170_usb_probe(struct usb_interface *intf, #ifdef CONFIG_PM udev->reset_resume = 1; -#endif +#endif /* CONFIG_PM */ err = ar9170_usb_reset(aru); if (err) goto err_freehw; @@ -813,11 +812,6 @@ static int ar9170_resume(struct usb_interface *intf) usb_unpoison_anchored_urbs(&aru->rx_submitted); usb_unpoison_anchored_urbs(&aru->tx_submitted); - /* - * FIXME: firmware upload will fail on resume. - * but this is better than a hang! - */ - err = ar9170_usb_init_device(aru); if (err) goto err_unrx; -- cgit v1.2.3 From 9b9c5aaeedfda256ed77094303e2a7242c3290da Mon Sep 17 00:00:00 2001 From: Christian Lamparter Date: Sat, 6 Jun 2009 05:07:23 +0200 Subject: ar9170: xmit code revamp This patch is a back-port from aggregation testing code. In the past, we didn't limit the amount of active tx urbs. However, ar9170 only has a limited buffer reserved for pending data frames. This wasn't much of a problem with the slower 802.11b/g. We simply stopped the full queue and moved on to something different in the mean time. But - as you guessed it - this simple approach stands in way for a decent aggregation implementation. Signed-off-by: Christian Lamparter Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ar9170/usb.c | 122 +++++++++++++++++++++++++++------- 1 file changed, 97 insertions(+), 25 deletions(-) (limited to 'drivers/net/wireless/ath/ar9170/usb.c') diff --git a/drivers/net/wireless/ath/ar9170/usb.c b/drivers/net/wireless/ath/ar9170/usb.c index f752698669d2..754b1f8d8da9 100644 --- a/drivers/net/wireless/ath/ar9170/usb.c +++ b/drivers/net/wireless/ath/ar9170/usb.c @@ -96,7 +96,49 @@ static struct usb_device_id ar9170_usb_ids[] = { }; MODULE_DEVICE_TABLE(usb, ar9170_usb_ids); -static void ar9170_usb_tx_urb_complete_free(struct urb *urb) +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 (aru->tx_submitted_urbs >= AR9170_NUM_TX_URBS) { + spin_unlock_irqrestore(&aru->tx_urb_lock, flags); + return ; + } + aru->tx_submitted_urbs++; + + urb = usb_get_from_anchor(&aru->tx_pending); + if (!urb) { + 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); + 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 *) @@ -107,8 +149,11 @@ static void ar9170_usb_tx_urb_complete_free(struct urb *urb) return ; } - ar9170_handle_tx_status(&aru->common, skb, false, - AR9170_TX_STATUS_COMPLETE); + 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) @@ -290,21 +335,47 @@ err_out: return err; } -static void ar9170_usb_cancel_urbs(struct ar9170_usb *aru) +static int ar9170_usb_flush(struct ar9170 *ar) { - int ret; + struct ar9170_usb *aru = (void *) ar; + struct urb *urb; + int ret, err = 0; - aru->common.state = AR9170_UNKNOWN_STATE; + if (IS_STARTED(ar)) + aru->common.state = AR9170_IDLE; - usb_unlink_anchored_urbs(&aru->tx_submitted); + 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); + } - /* give the LED OFF command and the deauth frame a chance to air. */ + /* 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) - dev_err(&aru->udev->dev, "kill pending tx urbs.\n"); - usb_poison_anchored_urbs(&aru->tx_submitted); + 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); } @@ -388,12 +459,10 @@ err_free: return err; } -static int ar9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb, - bool txstatus_needed, unsigned int extra_len) +static int ar9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb) { 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!? */ @@ -406,18 +475,17 @@ static int ar9170_usb_tx(struct ar9170 *ar, struct sk_buff *skb, 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); + skb->data, skb->len, + ar9170_usb_tx_urb_complete_frame, 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_anchor_urb(urb, &aru->tx_pending); + aru->tx_pending_urbs++; usb_free_urb(urb); - return err; + + ar9170_usb_submit_urb(aru); + return 0; } static void ar9170_usb_callback_cmd(struct ar9170 *ar, u32 len , void *buffer) @@ -617,10 +685,8 @@ static void ar9170_usb_stop(struct ar9170 *ar) 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) + ret = ar9170_usb_flush(ar); + if (ret) dev_err(&aru->udev->dev, "kill pending tx urbs.\n"); usb_poison_anchored_urbs(&aru->tx_submitted); @@ -716,10 +782,16 @@ static int ar9170_usb_probe(struct usb_interface *intf, SET_IEEE80211_DEV(ar->hw, &udev->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; + 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; -- cgit v1.2.3