Update b43 to work in AP mode

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12300 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 0 insertions, 842 deletions

diff --git a/package/b43/src/pio.c b/package/b43/src/pio.c
index 8b1555d95f..e69de29bb2 100644
--- a/package/b43/src/pio.c
+++ b/package/b43/src/pio.c
@@ -1,842 +0,0 @@
-/*
-
-  Broadcom B43 wireless driver
-
-  PIO data transfer
-
-  Copyright (c) 2005-2008 Michael Buesch <mb@bu3sch.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, write to
-  the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
-  Boston, MA 02110-1301, USA.
-
-*/
-
-#include "b43.h"
-#include "pio.h"
-#include "dma.h"
-#include "main.h"
-#include "xmit.h"
-
-#include <linux/delay.h>
-
-
-static void b43_pio_rx_work(struct work_struct *work);
-
-
-static u16 generate_cookie(struct b43_pio_txqueue *q,
-			   struct b43_pio_txpacket *pack)
-{
-	u16 cookie;
-
-	/* Use the upper 4 bits of the cookie as
-	 * PIO controller ID and store the packet index number
-	 * in the lower 12 bits.
-	 * Note that the cookie must never be 0, as this
-	 * is a special value used in RX path.
-	 * It can also not be 0xFFFF because that is special
-	 * for multicast frames.
-	 */
-	cookie = (((u16)q->index + 1) << 12);
-	cookie |= pack->index;
-
-	return cookie;
-}
-
-static
-struct b43_pio_txqueue * parse_cookie(struct b43_wldev *dev,
-				      u16 cookie,
-				      struct b43_pio_txpacket **pack)
-{
-	struct b43_pio *pio = &dev->pio;
-	struct b43_pio_txqueue *q = NULL;
-	unsigned int pack_index;
-
-	switch (cookie & 0xF000) {
-	case 0x1000:
-		q = pio->tx_queue_AC_BK;
-		break;
-	case 0x2000:
-		q = pio->tx_queue_AC_BE;
-		break;
-	case 0x3000:
-		q = pio->tx_queue_AC_VI;
-		break;
-	case 0x4000:
-		q = pio->tx_queue_AC_VO;
-		break;
-	case 0x5000:
-		q = pio->tx_queue_mcast;
-		break;
-	}
-	if (B43_WARN_ON(!q))
-		return NULL;
-	pack_index = (cookie & 0x0FFF);
-	if (B43_WARN_ON(pack_index >= ARRAY_SIZE(q->packets)))
-		return NULL;
-	*pack = &q->packets[pack_index];
-
-	return q;
-}
-
-static u16 index_to_pioqueue_base(struct b43_wldev *dev,
-				  unsigned int index)
-{
-	static const u16 bases[] = {
-		B43_MMIO_PIO_BASE0,
-		B43_MMIO_PIO_BASE1,
-		B43_MMIO_PIO_BASE2,
-		B43_MMIO_PIO_BASE3,
-		B43_MMIO_PIO_BASE4,
-		B43_MMIO_PIO_BASE5,
-		B43_MMIO_PIO_BASE6,
-		B43_MMIO_PIO_BASE7,
-	};
-	static const u16 bases_rev11[] = {
-		B43_MMIO_PIO11_BASE0,
-		B43_MMIO_PIO11_BASE1,
-		B43_MMIO_PIO11_BASE2,
-		B43_MMIO_PIO11_BASE3,
-		B43_MMIO_PIO11_BASE4,
-		B43_MMIO_PIO11_BASE5,
-	};
-
-	if (dev->dev->id.revision >= 11) {
-		B43_WARN_ON(index >= ARRAY_SIZE(bases_rev11));
-		return bases_rev11[index];
-	}
-	B43_WARN_ON(index >= ARRAY_SIZE(bases));
-	return bases[index];
-}
-
-static u16 pio_txqueue_offset(struct b43_wldev *dev)
-{
-	if (dev->dev->id.revision >= 11)
-		return 0x18;
-	return 0;
-}
-
-static u16 pio_rxqueue_offset(struct b43_wldev *dev)
-{
-	if (dev->dev->id.revision >= 11)
-		return 0x38;
-	return 8;
-}
-
-static struct b43_pio_txqueue * b43_setup_pioqueue_tx(struct b43_wldev *dev,
-						      unsigned int index)
-{
-	struct b43_pio_txqueue *q;
-	struct b43_pio_txpacket *p;
-	unsigned int i;
-
-	q = kzalloc(sizeof(*q), GFP_KERNEL);
-	if (!q)
-		return NULL;
-	spin_lock_init(&q->lock);
-	q->dev = dev;
-	q->rev = dev->dev->id.revision;
-	q->mmio_base = index_to_pioqueue_base(dev, index) +
-		       pio_txqueue_offset(dev);
-	q->index = index;
-
-	q->free_packet_slots = B43_PIO_MAX_NR_TXPACKETS;
-	if (q->rev >= 8) {
-		q->buffer_size = 1920; //FIXME this constant is wrong.
-	} else {
-		q->buffer_size = b43_piotx_read16(q, B43_PIO_TXQBUFSIZE);
-		q->buffer_size -= 80;
-	}
-
-	INIT_LIST_HEAD(&q->packets_list);
-	for (i = 0; i < ARRAY_SIZE(q->packets); i++) {
-		p = &(q->packets[i]);
-		INIT_LIST_HEAD(&p->list);
-		p->index = i;
-		p->queue = q;
-		list_add(&p->list, &q->packets_list);
-	}
-
-	return q;
-}
-
-static struct b43_pio_rxqueue * b43_setup_pioqueue_rx(struct b43_wldev *dev,
-						      unsigned int index)
-{
-	struct b43_pio_rxqueue *q;
-
-	q = kzalloc(sizeof(*q), GFP_KERNEL);
-	if (!q)
-		return NULL;
-	spin_lock_init(&q->lock);
-	q->dev = dev;
-	q->rev = dev->dev->id.revision;
-	q->mmio_base = index_to_pioqueue_base(dev, index) +
-		       pio_rxqueue_offset(dev);
-	INIT_WORK(&q->rx_work, b43_pio_rx_work);
-
-	/* Enable Direct FIFO RX (PIO) on the engine. */
-	b43_dma_direct_fifo_rx(dev, index, 1);
-
-	return q;
-}
-
-static void b43_pio_cancel_tx_packets(struct b43_pio_txqueue *q)
-{
-	struct b43_pio_txpacket *pack;
-	unsigned int i;
-
-	for (i = 0; i < ARRAY_SIZE(q->packets); i++) {
-		pack = &(q->packets[i]);
-		if (pack->skb) {
-			dev_kfree_skb_any(pack->skb);
-			pack->skb = NULL;
-		}
-	}
-}
-
-static void b43_destroy_pioqueue_tx(struct b43_pio_txqueue *q,
-				    const char *name)
-{
-	if (!q)
-		return;
-	b43_pio_cancel_tx_packets(q);
-	kfree(q);
-}
-
-static void b43_destroy_pioqueue_rx(struct b43_pio_rxqueue *q,
-				    const char *name)
-{
-	if (!q)
-		return;
-	kfree(q);
-}
-
-#define destroy_queue_tx(pio, queue) do {				\
-	b43_destroy_pioqueue_tx((pio)->queue, __stringify(queue));	\
-	(pio)->queue = NULL;						\
-  } while (0)
-
-#define destroy_queue_rx(pio, queue) do {				\
-	b43_destroy_pioqueue_rx((pio)->queue, __stringify(queue));	\
-	(pio)->queue = NULL;						\
-  } while (0)
-
-void b43_pio_free(struct b43_wldev *dev)
-{
-	struct b43_pio *pio;
-
-	if (!b43_using_pio_transfers(dev))
-		return;
-	pio = &dev->pio;
-
-	destroy_queue_rx(pio, rx_queue);
-	destroy_queue_tx(pio, tx_queue_mcast);
-	destroy_queue_tx(pio, tx_queue_AC_VO);
-	destroy_queue_tx(pio, tx_queue_AC_VI);
-	destroy_queue_tx(pio, tx_queue_AC_BE);
-	destroy_queue_tx(pio, tx_queue_AC_BK);
-}
-
-void b43_pio_stop(struct b43_wldev *dev)
-{
-	if (!b43_using_pio_transfers(dev))
-		return;
-	cancel_work_sync(&dev->pio.rx_queue->rx_work);
-}
-
-int b43_pio_init(struct b43_wldev *dev)
-{
-	struct b43_pio *pio = &dev->pio;
-	int err = -ENOMEM;
-
-	b43_write32(dev, B43_MMIO_MACCTL, b43_read32(dev, B43_MMIO_MACCTL)
-		    & ~B43_MACCTL_BE);
-	b43_shm_write16(dev, B43_SHM_SHARED, B43_SHM_SH_RXPADOFF, 0);
-
-	pio->tx_queue_AC_BK = b43_setup_pioqueue_tx(dev, 0);
-	if (!pio->tx_queue_AC_BK)
-		goto out;
-
-	pio->tx_queue_AC_BE = b43_setup_pioqueue_tx(dev, 1);
-	if (!pio->tx_queue_AC_BE)
-		goto err_destroy_bk;
-
-	pio->tx_queue_AC_VI = b43_setup_pioqueue_tx(dev, 2);
-	if (!pio->tx_queue_AC_VI)
-		goto err_destroy_be;
-
-	pio->tx_queue_AC_VO = b43_setup_pioqueue_tx(dev, 3);
-	if (!pio->tx_queue_AC_VO)
-		goto err_destroy_vi;
-
-	pio->tx_queue_mcast = b43_setup_pioqueue_tx(dev, 4);
-	if (!pio->tx_queue_mcast)
-		goto err_destroy_vo;
-
-	pio->rx_queue = b43_setup_pioqueue_rx(dev, 0);
-	if (!pio->rx_queue)
-		goto err_destroy_mcast;
-
-	b43dbg(dev->wl, "PIO initialized\n");
-	err = 0;
-out:
-	return err;
-
-err_destroy_mcast:
-	destroy_queue_tx(pio, tx_queue_mcast);
-err_destroy_vo:
-	destroy_queue_tx(pio, tx_queue_AC_VO);
-err_destroy_vi:
-	destroy_queue_tx(pio, tx_queue_AC_VI);
-err_destroy_be:
-	destroy_queue_tx(pio, tx_queue_AC_BE);
-err_destroy_bk:
-	destroy_queue_tx(pio, tx_queue_AC_BK);
-	return err;
-}
-
-/* Static mapping of mac80211's queues (priorities) to b43 PIO queues. */
-static struct b43_pio_txqueue * select_queue_by_priority(struct b43_wldev *dev,
-							 u8 queue_prio)
-{
-	struct b43_pio_txqueue *q;
-
-	if (b43_modparam_qos) {
-		/* 0 = highest priority */
-		switch (queue_prio) {
-		default:
-			B43_WARN_ON(1);
-			/* fallthrough */
-		case 0:
-			q = dev->pio.tx_queue_AC_VO;
-			break;
-		case 1:
-			q = dev->pio.tx_queue_AC_VI;
-			break;
-		case 2:
-			q = dev->pio.tx_queue_AC_BE;
-			break;
-		case 3:
-			q = dev->pio.tx_queue_AC_BK;
-			break;
-		}
-	} else
-		q = dev->pio.tx_queue_AC_BE;
-
-	return q;
-}
-
-static u16 tx_write_2byte_queue(struct b43_pio_txqueue *q,
-				u16 ctl,
-				const void *_data,
-				unsigned int data_len)
-{
-	struct b43_wldev *dev = q->dev;
-	const u8 *data = _data;
-
-	ctl |= B43_PIO_TXCTL_WRITELO | B43_PIO_TXCTL_WRITEHI;
-	b43_piotx_write16(q, B43_PIO_TXCTL, ctl);
-
-	ssb_block_write(dev->dev, data, (data_len & ~1),
-			q->mmio_base + B43_PIO_TXDATA,
-			sizeof(u16));
-	if (data_len & 1) {
-		/* Write the last byte. */
-		ctl &= ~B43_PIO_TXCTL_WRITEHI;
-		b43_piotx_write16(q, B43_PIO_TXCTL, ctl);
-		b43_piotx_write16(q, B43_PIO_TXDATA, data[data_len - 1]);
-	}
-
-	return ctl;
-}
-
-static void pio_tx_frame_2byte_queue(struct b43_pio_txpacket *pack,
-				     const u8 *hdr, unsigned int hdrlen)
-{
-	struct b43_pio_txqueue *q = pack->queue;
-	const char *frame = pack->skb->data;
-	unsigned int frame_len = pack->skb->len;
-	u16 ctl;
-
-	ctl = b43_piotx_read16(q, B43_PIO_TXCTL);
-	ctl |= B43_PIO_TXCTL_FREADY;
-	ctl &= ~B43_PIO_TXCTL_EOF;
-
-	/* Transfer the header data. */
-	ctl = tx_write_2byte_queue(q, ctl, hdr, hdrlen);
-	/* Transfer the frame data. */
-	ctl = tx_write_2byte_queue(q, ctl, frame, frame_len);
-
-	ctl |= B43_PIO_TXCTL_EOF;
-	b43_piotx_write16(q, B43_PIO_TXCTL, ctl);
-}
-
-static u32 tx_write_4byte_queue(struct b43_pio_txqueue *q,
-				u32 ctl,
-				const void *_data,
-				unsigned int data_len)
-{
-	struct b43_wldev *dev = q->dev;
-	const u8 *data = _data;
-
-	ctl |= B43_PIO8_TXCTL_0_7 | B43_PIO8_TXCTL_8_15 |
-	       B43_PIO8_TXCTL_16_23 | B43_PIO8_TXCTL_24_31;
-	b43_piotx_write32(q, B43_PIO8_TXCTL, ctl);
-
-	ssb_block_write(dev->dev, data, (data_len & ~3),
-			q->mmio_base + B43_PIO8_TXDATA,
-			sizeof(u32));
-	if (data_len & 3) {
-		u32 value = 0;
-
-		/* Write the last few bytes. */
-		ctl &= ~(B43_PIO8_TXCTL_8_15 | B43_PIO8_TXCTL_16_23 |
-			 B43_PIO8_TXCTL_24_31);
-		data = &(data[data_len - 1]);
-		switch (data_len & 3) {
-		case 3:
-			ctl |= B43_PIO8_TXCTL_16_23;
-			value |= (u32)(*data) << 16;
-			data--;
-		case 2:
-			ctl |= B43_PIO8_TXCTL_8_15;
-			value |= (u32)(*data) << 8;
-			data--;
-		case 1:
-			value |= (u32)(*data);
-		}
-		b43_piotx_write32(q, B43_PIO8_TXCTL, ctl);
-		b43_piotx_write32(q, B43_PIO8_TXDATA, value);
-	}
-
-	return ctl;
-}
-
-static void pio_tx_frame_4byte_queue(struct b43_pio_txpacket *pack,
-				     const u8 *hdr, unsigned int hdrlen)
-{
-	struct b43_pio_txqueue *q = pack->queue;
-	const char *frame = pack->skb->data;
-	unsigned int frame_len = pack->skb->len;
-	u32 ctl;
-
-	ctl = b43_piotx_read32(q, B43_PIO8_TXCTL);
-	ctl |= B43_PIO8_TXCTL_FREADY;
-	ctl &= ~B43_PIO8_TXCTL_EOF;
-
-	/* Transfer the header data. */
-	ctl = tx_write_4byte_queue(q, ctl, hdr, hdrlen);
-	/* Transfer the frame data. */
-	ctl = tx_write_4byte_queue(q, ctl, frame, frame_len);
-
-	ctl |= B43_PIO8_TXCTL_EOF;
-	b43_piotx_write32(q, B43_PIO_TXCTL, ctl);
-}
-
-static int pio_tx_frame(struct b43_pio_txqueue *q,
-			struct sk_buff *skb)
-{
-	struct b43_pio_txpacket *pack;
-	struct b43_txhdr txhdr;
-	u16 cookie;
-	int err;
-	unsigned int hdrlen;
-	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-
-	B43_WARN_ON(list_empty(&q->packets_list));
-	pack = list_entry(q->packets_list.next,
-			  struct b43_pio_txpacket, list);
-
-	cookie = generate_cookie(q, pack);
-	hdrlen = b43_txhdr_size(q->dev);
-	err = b43_generate_txhdr(q->dev, (u8 *)&txhdr, skb->data,
-				 skb->len, info, cookie);
-	if (err)
-		return err;
-
-	if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
-		/* Tell the firmware about the cookie of the last
-		 * mcast frame, so it can clear the more-data bit in it. */
-		b43_shm_write16(q->dev, B43_SHM_SHARED,
-				B43_SHM_SH_MCASTCOOKIE, cookie);
-	}
-
-	pack->skb = skb;
-	if (q->rev >= 8)
-		pio_tx_frame_4byte_queue(pack, (const u8 *)&txhdr, hdrlen);
-	else
-		pio_tx_frame_2byte_queue(pack, (const u8 *)&txhdr, hdrlen);
-
-	/* Remove it from the list of available packet slots.
-	 * It will be put back when we receive the status report. */
-	list_del(&pack->list);
-
-	/* Update the queue statistics. */
-	q->buffer_used += roundup(skb->len + hdrlen, 4);
-	q->free_packet_slots -= 1;
-
-	return 0;
-}
-
-int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb)
-{
-	struct b43_pio_txqueue *q;
-	struct ieee80211_hdr *hdr;
-	unsigned long flags;
-	unsigned int hdrlen, total_len;
-	int err = 0;
-	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-
-	hdr = (struct ieee80211_hdr *)skb->data;
-
-	if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
-		/* The multicast queue will be sent after the DTIM. */
-		q = dev->pio.tx_queue_mcast;
-		/* Set the frame More-Data bit. Ucode will clear it
-		 * for us on the last frame. */
-		hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA);
-	} else {
-		/* Decide by priority where to put this frame. */
-		q = select_queue_by_priority(dev, skb_get_queue_mapping(skb));
-	}
-
-	spin_lock_irqsave(&q->lock, flags);
-
-	hdrlen = b43_txhdr_size(dev);
-	total_len = roundup(skb->len + hdrlen, 4);
-
-	if (unlikely(total_len > q->buffer_size)) {
-		err = -ENOBUFS;
-		b43dbg(dev->wl, "PIO: TX packet longer than queue.\n");
-		goto out_unlock;
-	}
-	if (unlikely(q->free_packet_slots == 0)) {
-		err = -ENOBUFS;
-		b43warn(dev->wl, "PIO: TX packet overflow.\n");
-		goto out_unlock;
-	}
-	B43_WARN_ON(q->buffer_used > q->buffer_size);
-
-	if (total_len > (q->buffer_size - q->buffer_used)) {
-		/* Not enough memory on the queue. */
-		err = -EBUSY;
-		ieee80211_stop_queue(dev->wl->hw, skb_get_queue_mapping(skb));
-		q->stopped = 1;
-		goto out_unlock;
-	}
-
-	/* Assign the queue number to the ring (if not already done before)
-	 * so TX status handling can use it. The mac80211-queue to b43-queue
-	 * mapping is static, so we don't need to store it per frame. */
-	q->queue_prio = skb_get_queue_mapping(skb);
-
-	err = pio_tx_frame(q, skb);
-	if (unlikely(err == -ENOKEY)) {
-		/* Drop this packet, as we don't have the encryption key
-		 * anymore and must not transmit it unencrypted. */
-		dev_kfree_skb_any(skb);
-		err = 0;
-		goto out_unlock;
-	}
-	if (unlikely(err)) {
-		b43err(dev->wl, "PIO transmission failure\n");
-		goto out_unlock;
-	}
-	q->nr_tx_packets++;
-
-	B43_WARN_ON(q->buffer_used > q->buffer_size);
-	if (((q->buffer_size - q->buffer_used) < roundup(2 + 2 + 6, 4)) ||
-	    (q->free_packet_slots == 0)) {
-		/* The queue is full. */
-		ieee80211_stop_queue(dev->wl->hw, skb_get_queue_mapping(skb));
-		q->stopped = 1;
-	}
-
-out_unlock:
-	spin_unlock_irqrestore(&q->lock, flags);
-
-	return err;
-}
-
-/* Called with IRQs disabled. */
-void b43_pio_handle_txstatus(struct b43_wldev *dev,
-			     const struct b43_txstatus *status)
-{
-	struct b43_pio_txqueue *q;
-	struct b43_pio_txpacket *pack = NULL;
-	unsigned int total_len;
-	struct ieee80211_tx_info *info;
-
-	q = parse_cookie(dev, status->cookie, &pack);
-	if (unlikely(!q))
-		return;
-	B43_WARN_ON(!pack);
-
-	spin_lock(&q->lock); /* IRQs are already disabled. */
-
-	info = (void *)pack->skb;
-	memset(&info->status, 0, sizeof(info->status));
-
-	b43_fill_txstatus_report(info, status);
-
-	total_len = pack->skb->len + b43_txhdr_size(dev);
-	total_len = roundup(total_len, 4);
-	q->buffer_used -= total_len;
-	q->free_packet_slots += 1;
-
-	ieee80211_tx_status_irqsafe(dev->wl->hw, pack->skb);
-	pack->skb = NULL;
-	list_add(&pack->list, &q->packets_list);
-
-	if (q->stopped) {
-		ieee80211_wake_queue(dev->wl->hw, q->queue_prio);
-		q->stopped = 0;
-	}
-
-	spin_unlock(&q->lock);
-}
-
-void b43_pio_get_tx_stats(struct b43_wldev *dev,
-			  struct ieee80211_tx_queue_stats *stats)
-{
-	const int nr_queues = dev->wl->hw->queues;
-	struct b43_pio_txqueue *q;
-	unsigned long flags;
-	int i;
-
-	for (i = 0; i < nr_queues; i++) {
-		q = select_queue_by_priority(dev, i);
-
-		spin_lock_irqsave(&q->lock, flags);
-		stats[i].len = B43_PIO_MAX_NR_TXPACKETS - q->free_packet_slots;
-		stats[i].limit = B43_PIO_MAX_NR_TXPACKETS;
-		stats[i].count = q->nr_tx_packets;
-		spin_unlock_irqrestore(&q->lock, flags);
-	}
-}
-
-/* Returns whether we should fetch another frame. */
-static bool pio_rx_frame(struct b43_pio_rxqueue *q)
-{
-	struct b43_wldev *dev = q->dev;
-	struct b43_rxhdr_fw4 rxhdr;
-	u16 len;
-	u32 macstat;
-	unsigned int i, padding;
-	struct sk_buff *skb;
-	const char *err_msg = NULL;
-
-	memset(&rxhdr, 0, sizeof(rxhdr));
-
-	/* Check if we have data and wait for it to get ready. */
-	if (q->rev >= 8) {
-		u32 ctl;
-
-		ctl = b43_piorx_read32(q, B43_PIO8_RXCTL);
-		if (!(ctl & B43_PIO8_RXCTL_FRAMERDY))
-			return 0;
-		b43_piorx_write32(q, B43_PIO8_RXCTL,
-				  B43_PIO8_RXCTL_FRAMERDY);
-		for (i = 0; i < 10; i++) {
-			ctl = b43_piorx_read32(q, B43_PIO8_RXCTL);
-			if (ctl & B43_PIO8_RXCTL_DATARDY)
-				goto data_ready;
-			udelay(10);
-		}
-	} else {
-		u16 ctl;
-
-		ctl = b43_piorx_read16(q, B43_PIO_RXCTL);
-		if (!(ctl & B43_PIO_RXCTL_FRAMERDY))
-			return 0;
-		b43_piorx_write16(q, B43_PIO_RXCTL,
-				  B43_PIO_RXCTL_FRAMERDY);
-		for (i = 0; i < 10; i++) {
-			ctl = b43_piorx_read16(q, B43_PIO_RXCTL);
-			if (ctl & B43_PIO_RXCTL_DATARDY)
-				goto data_ready;
-			udelay(10);
-		}
-	}
-	b43dbg(q->dev->wl, "PIO RX timed out\n");
-	return 1;
-data_ready:
-
-	/* Get the preamble (RX header) */
-	if (q->rev >= 8) {
-		ssb_block_read(dev->dev, &rxhdr, sizeof(rxhdr),
-			       q->mmio_base + B43_PIO8_RXDATA,
-			       sizeof(u32));
-	} else {
-		ssb_block_read(dev->dev, &rxhdr, sizeof(rxhdr),
-			       q->mmio_base + B43_PIO_RXDATA,
-			       sizeof(u16));
-	}
-	/* Sanity checks. */
-	len = le16_to_cpu(rxhdr.frame_len);
-	if (unlikely(len > 0x700)) {
-		err_msg = "len > 0x700";
-		goto rx_error;
-	}
-	if (unlikely(len == 0)) {
-		err_msg = "len == 0";
-		goto rx_error;
-	}
-
-	macstat = le32_to_cpu(rxhdr.mac_status);
-	if (macstat & B43_RX_MAC_FCSERR) {
-		if (!(q->dev->wl->filter_flags & FIF_FCSFAIL)) {
-			/* Drop frames with failed FCS. */
-			err_msg = "Frame FCS error";
-			goto rx_error;
-		}
-	}
-
-	/* We always pad 2 bytes, as that's what upstream code expects
-	 * due to the RX-header being 30 bytes. In case the frame is
-	 * unaligned, we pad another 2 bytes. */
-	padding = (macstat & B43_RX_MAC_PADDING) ? 2 : 0;
-	skb = dev_alloc_skb(len + padding + 2);
-	if (unlikely(!skb)) {
-		err_msg = "Out of memory";
-		goto rx_error;
-	}
-	skb_reserve(skb, 2);
-	skb_put(skb, len + padding);
-	if (q->rev >= 8) {
-		ssb_block_read(dev->dev, skb->data + padding, (len & ~3),
-			       q->mmio_base + B43_PIO8_RXDATA,
-			       sizeof(u32));
-		if (len & 3) {
-			u32 value;
-			char *data;
-
-			/* Read the last few bytes. */
-			value = b43_piorx_read32(q, B43_PIO8_RXDATA);
-			data = &(skb->data[len + padding - 1]);
-			switch (len & 3) {
-			case 3:
-				*data = (value >> 16);
-				data--;
-			case 2:
-				*data = (value >> 8);
-				data--;
-			case 1:
-				*data = value;
-			}
-		}
-	} else {
-		ssb_block_read(dev->dev, skb->data + padding, (len & ~1),
-			       q->mmio_base + B43_PIO_RXDATA,
-			       sizeof(u16));
-		if (len & 1) {
-			u16 value;
-
-			/* Read the last byte. */
-			value = b43_piorx_read16(q, B43_PIO_RXDATA);
-			skb->data[len + padding - 1] = value;
-		}
-	}
-
-	b43_rx(q->dev, skb, &rxhdr);
-
-	return 1;
-
-rx_error:
-	if (err_msg)
-		b43dbg(q->dev->wl, "PIO RX error: %s\n", err_msg);
-	b43_piorx_write16(q, B43_PIO_RXCTL, B43_PIO_RXCTL_DATARDY);
-	return 1;
-}
-
-/* RX workqueue. We can sleep, yay! */
-static void b43_pio_rx_work(struct work_struct *work)
-{
-	struct b43_pio_rxqueue *q = container_of(work, struct b43_pio_rxqueue,
-						 rx_work);
-	unsigned int budget = 50;
-	bool stop;
-
-	do {
-		spin_lock_irq(&q->lock);
-		stop = (pio_rx_frame(q) == 0);
-		spin_unlock_irq(&q->lock);
-		cond_resched();
-		if (stop)
-			break;
-	} while (--budget);
-}
-
-/* Called with IRQs disabled. */
-void b43_pio_rx(struct b43_pio_rxqueue *q)
-{
-	/* Due to latency issues we must run the RX path in
-	 * a workqueue to be able to schedule between packets. */
-	queue_work(q->dev->wl->hw->workqueue, &q->rx_work);
-}
-
-static void b43_pio_tx_suspend_queue(struct b43_pio_txqueue *q)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&q->lock, flags);
-	if (q->rev >= 8) {
-		b43_piotx_write32(q, B43_PIO8_TXCTL,
-				  b43_piotx_read32(q, B43_PIO8_TXCTL)
-				  | B43_PIO8_TXCTL_SUSPREQ);
-	} else {
-		b43_piotx_write16(q, B43_PIO_TXCTL,
-				  b43_piotx_read16(q, B43_PIO_TXCTL)
-				  | B43_PIO_TXCTL_SUSPREQ);
-	}
-	spin_unlock_irqrestore(&q->lock, flags);
-}
-
-static void b43_pio_tx_resume_queue(struct b43_pio_txqueue *q)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&q->lock, flags);
-	if (q->rev >= 8) {
-		b43_piotx_write32(q, B43_PIO8_TXCTL,
-				  b43_piotx_read32(q, B43_PIO8_TXCTL)
-				  & ~B43_PIO8_TXCTL_SUSPREQ);
-	} else {
-		b43_piotx_write16(q, B43_PIO_TXCTL,
-				  b43_piotx_read16(q, B43_PIO_TXCTL)
-				  & ~B43_PIO_TXCTL_SUSPREQ);
-	}
-	spin_unlock_irqrestore(&q->lock, flags);
-}
-
-void b43_pio_tx_suspend(struct b43_wldev *dev)
-{
-	b43_power_saving_ctl_bits(dev, B43_PS_AWAKE);
-	b43_pio_tx_suspend_queue(dev->pio.tx_queue_AC_BK);
-	b43_pio_tx_suspend_queue(dev->pio.tx_queue_AC_BE);
-	b43_pio_tx_suspend_queue(dev->pio.tx_queue_AC_VI);
-	b43_pio_tx_suspend_queue(dev->pio.tx_queue_AC_VO);
-	b43_pio_tx_suspend_queue(dev->pio.tx_queue_mcast);
-}
-
-void b43_pio_tx_resume(struct b43_wldev *dev)
-{
-	b43_pio_tx_resume_queue(dev->pio.tx_queue_mcast);
-	b43_pio_tx_resume_queue(dev->pio.tx_queue_AC_VO);
-	b43_pio_tx_resume_queue(dev->pio.tx_queue_AC_VI);
-	b43_pio_tx_resume_queue(dev->pio.tx_queue_AC_BE);
-	b43_pio_tx_resume_queue(dev->pio.tx_queue_AC_BK);
-	b43_power_saving_ctl_bits(dev, 0);
-}