b43: finish removal of pio support

As suggested in "b43: Remove PIO support"...

Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 0 insertions, 805 deletions

diff --git a/drivers/net/wireless/b43/pio.c b/drivers/net/wireless/b43/pio.c
deleted file mode 100644
index 67752a28eb9c..000000000000
--- a/drivers/net/wireless/b43/pio.c
+++ /dev/null
@@ -1,652 +0,0 @@
-/*
-
-  Broadcom B43 wireless driver
-
-  PIO Transmission
-
-  Copyright (c) 2005 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 "main.h"
-#include "xmit.h"
-
-#include <linux/delay.h>
-
-static void tx_start(struct b43_pioqueue *queue)
-{
-        b43_pio_write(queue, B43_PIO_TXCTL, B43_PIO_TXCTL_INIT);
-}
-
-static void tx_octet(struct b43_pioqueue *queue, u8 octet)
-{
-        if (queue->need_workarounds) {
-                b43_pio_write(queue, B43_PIO_TXDATA, octet);
-                b43_pio_write(queue, B43_PIO_TXCTL, B43_PIO_TXCTL_WRITELO);
-        } else {
-                b43_pio_write(queue, B43_PIO_TXCTL, B43_PIO_TXCTL_WRITELO);
-                b43_pio_write(queue, B43_PIO_TXDATA, octet);
-        }
-}
-
-static u16 tx_get_next_word(const u8 * txhdr,
-                            const u8 * packet,
-                            size_t txhdr_size, unsigned int *pos)
-{
-        const u8 *source;
-        unsigned int i = *pos;
-        u16 ret;
-
-        if (i < txhdr_size) {
-                source = txhdr;
-        } else {
-                source = packet;
-                i -= txhdr_size;
-        }
-        ret = le16_to_cpu(*((__le16 *)(source + i)));
-        *pos += 2;
-
-        return ret;
-}
-
-static void tx_data(struct b43_pioqueue *queue,
-                    u8 * txhdr, const u8 * packet, unsigned int octets)
-{
-        u16 data;
-        unsigned int i = 0;
-
-        if (queue->need_workarounds) {
-                data = tx_get_next_word(txhdr, packet,
-                                        sizeof(struct b43_txhdr_fw4), &i);
-                b43_pio_write(queue, B43_PIO_TXDATA, data);
-        }
-        b43_pio_write(queue, B43_PIO_TXCTL,
-                      B43_PIO_TXCTL_WRITELO | B43_PIO_TXCTL_WRITEHI);
-        while (i < octets - 1) {
-                data = tx_get_next_word(txhdr, packet,
-                                        sizeof(struct b43_txhdr_fw4), &i);
-                b43_pio_write(queue, B43_PIO_TXDATA, data);
-        }
-        if (octets % 2)
-                tx_octet(queue,
-                         packet[octets - sizeof(struct b43_txhdr_fw4) - 1]);
-}
-
-static void tx_complete(struct b43_pioqueue *queue, struct sk_buff *skb)
-{
-        if (queue->need_workarounds) {
-                b43_pio_write(queue, B43_PIO_TXDATA, skb->data[skb->len - 1]);
-                b43_pio_write(queue, B43_PIO_TXCTL,
-                              B43_PIO_TXCTL_WRITELO | B43_PIO_TXCTL_COMPLETE);
-        } else {
-                b43_pio_write(queue, B43_PIO_TXCTL, B43_PIO_TXCTL_COMPLETE);
-        }
-}
-
-static u16 generate_cookie(struct b43_pioqueue *queue,
-                           struct b43_pio_txpacket *packet)
-{
-        u16 cookie = 0x0000;
-        u16 packetindex;
-
-        /* We use the upper 4 bits for the PIO
-         * controller ID and the lower 12 bits
-         * for the packet index (in the cache).
-         */
-        switch (queue->mmio_base) {
-        case B43_MMIO_PIO1_BASE:
-                break;
-        case B43_MMIO_PIO2_BASE:
-                cookie = 0x1000;
-                break;
-        case B43_MMIO_PIO3_BASE:
-                cookie = 0x2000;
-                break;
-        case B43_MMIO_PIO4_BASE:
-                cookie = 0x3000;
-                break;
-        default:
-                B43_WARN_ON(1);
-        }
-        packetindex = packet->index;
-        B43_WARN_ON(packetindex & ~0x0FFF);
-        cookie |= (u16) packetindex;
-
-        return cookie;
-}
-
-static
-struct b43_pioqueue *parse_cookie(struct b43_wldev *dev,
-                                  u16 cookie, struct b43_pio_txpacket **packet)
-{
-        struct b43_pio *pio = &dev->pio;
-        struct b43_pioqueue *queue = NULL;
-        int packetindex;
-
-        switch (cookie & 0xF000) {
-        case 0x0000:
-                queue = pio->queue0;
-                break;
-        case 0x1000:
-                queue = pio->queue1;
-                break;
-        case 0x2000:
-                queue = pio->queue2;
-                break;
-        case 0x3000:
-                queue = pio->queue3;
-                break;
-        default:
-                B43_WARN_ON(1);
-        }
-        packetindex = (cookie & 0x0FFF);
-        B43_WARN_ON(!(packetindex >= 0 && packetindex < B43_PIO_MAXTXPACKETS));
-        *packet = &(queue->tx_packets_cache[packetindex]);
-
-        return queue;
-}
-
-union txhdr_union {
-        struct b43_txhdr_fw4 txhdr_fw4;
-};
-
-static void pio_tx_write_fragment(struct b43_pioqueue *queue,
-                                  struct sk_buff *skb,
-                                  struct b43_pio_txpacket *packet,
-                                  size_t txhdr_size)
-{
-        union txhdr_union txhdr_data;
-        u8 *txhdr = NULL;
-        unsigned int octets;
-
-        txhdr = (u8 *) (&txhdr_data.txhdr_fw4);
-
-        B43_WARN_ON(skb_shinfo(skb)->nr_frags);
-        b43_generate_txhdr(queue->dev,
-                           txhdr, skb->data, skb->len,
-                           &packet->txstat.control,
-                           generate_cookie(queue, packet));
-
-        tx_start(queue);
-        octets = skb->len + txhdr_size;
-        if (queue->need_workarounds)
-                octets--;
-        tx_data(queue, txhdr, (u8 *) skb->data, octets);
-        tx_complete(queue, skb);
-}
-
-static void free_txpacket(struct b43_pio_txpacket *packet)
-{
-        struct b43_pioqueue *queue = packet->queue;
-
-        if (packet->skb)
-                dev_kfree_skb_any(packet->skb);
-        list_move(&packet->list, &queue->txfree);
-        queue->nr_txfree++;
-}
-
-static int pio_tx_packet(struct b43_pio_txpacket *packet)
-{
-        struct b43_pioqueue *queue = packet->queue;
-        struct sk_buff *skb = packet->skb;
-        u16 octets;
-
-        octets = (u16) skb->len + sizeof(struct b43_txhdr_fw4);
-        if (queue->tx_devq_size < octets) {
-                b43warn(queue->dev->wl, "PIO queue too small. "
-                        "Dropping packet.\n");
-                /* Drop it silently (return success) */
-                free_txpacket(packet);
-                return 0;
-        }
-        B43_WARN_ON(queue->tx_devq_packets > B43_PIO_MAXTXDEVQPACKETS);
-        B43_WARN_ON(queue->tx_devq_used > queue->tx_devq_size);
-        /* Check if there is sufficient free space on the device
-         * TX queue. If not, return and let the TX tasklet
-         * retry later.
-         */
-        if (queue->tx_devq_packets == B43_PIO_MAXTXDEVQPACKETS)
-                return -EBUSY;
-        if (queue->tx_devq_used + octets > queue->tx_devq_size)
-                return -EBUSY;
-        /* Now poke the device. */
-        pio_tx_write_fragment(queue, skb, packet, sizeof(struct b43_txhdr_fw4));
-
-        /* Account for the packet size.
-         * (We must not overflow the device TX queue)
-         */
-        queue->tx_devq_packets++;
-        queue->tx_devq_used += octets;
-
-        /* Transmission started, everything ok, move the
-         * packet to the txrunning list.
-         */
-        list_move_tail(&packet->list, &queue->txrunning);
-
-        return 0;
-}
-
-static void tx_tasklet(unsigned long d)
-{
-        struct b43_pioqueue *queue = (struct b43_pioqueue *)d;
-        struct b43_wldev *dev = queue->dev;
-        unsigned long flags;
-        struct b43_pio_txpacket *packet, *tmp_packet;
-        int err;
-        u16 txctl;
-
-        spin_lock_irqsave(&dev->wl->irq_lock, flags);
-        if (queue->tx_frozen)
-                goto out_unlock;
-        txctl = b43_pio_read(queue, B43_PIO_TXCTL);
-        if (txctl & B43_PIO_TXCTL_SUSPEND)
-                goto out_unlock;
-
-        list_for_each_entry_safe(packet, tmp_packet, &queue->txqueue, list) {
-                /* Try to transmit the packet. This can fail, if
-                 * the device queue is full. In case of failure, the
-                 * packet is left in the txqueue.
-                 * If transmission succeed, the packet is moved to txrunning.
-                 * If it is impossible to transmit the packet, it
-                 * is dropped.
-                 */
-                err = pio_tx_packet(packet);
-                if (err)
-                        break;
-        }
-      out_unlock:
-        spin_unlock_irqrestore(&dev->wl->irq_lock, flags);
-}
-
-static void setup_txqueues(struct b43_pioqueue *queue)
-{
-        struct b43_pio_txpacket *packet;
-        int i;
-
-        queue->nr_txfree = B43_PIO_MAXTXPACKETS;
-        for (i = 0; i < B43_PIO_MAXTXPACKETS; i++) {
-                packet = &(queue->tx_packets_cache[i]);
-
-                packet->queue = queue;
-                INIT_LIST_HEAD(&packet->list);
-                packet->index = i;
-
-                list_add(&packet->list, &queue->txfree);
-        }
-}
-
-static
-struct b43_pioqueue *b43_setup_pioqueue(struct b43_wldev *dev,
-                                        u16 pio_mmio_base)
-{
-        struct b43_pioqueue *queue;
-        u16 qsize;
-
-        queue = kzalloc(sizeof(*queue), GFP_KERNEL);
-        if (!queue)
-                goto out;
-
-        queue->dev = dev;
-        queue->mmio_base = pio_mmio_base;
-        queue->need_workarounds = (dev->dev->id.revision < 3);
-
-        INIT_LIST_HEAD(&queue->txfree);
-        INIT_LIST_HEAD(&queue->txqueue);
-        INIT_LIST_HEAD(&queue->txrunning);
-        tasklet_init(&queue->txtask, tx_tasklet, (unsigned long)queue);
-
-        b43_write32(dev, B43_MMIO_MACCTL, b43_read32(dev, B43_MMIO_MACCTL)
-                    & ~B43_MACCTL_BE);
-
-        qsize = b43_read16(dev, queue->mmio_base + B43_PIO_TXQBUFSIZE);
-        if (qsize == 0) {
-                b43err(dev->wl, "This card does not support PIO "
-                       "operation mode. Please use DMA mode "
-                       "(module parameter pio=0).\n");
-                goto err_freequeue;
-        }
-        if (qsize <= B43_PIO_TXQADJUST) {
-                b43err(dev->wl, "PIO tx device-queue too small (%u)\n", qsize);
-                goto err_freequeue;
-        }
-        qsize -= B43_PIO_TXQADJUST;
-        queue->tx_devq_size = qsize;
-
-        setup_txqueues(queue);
-
-      out:
-        return queue;
-
-      err_freequeue:
-        kfree(queue);
-        queue = NULL;
-        goto out;
-}
-
-static void cancel_transfers(struct b43_pioqueue *queue)
-{
-        struct b43_pio_txpacket *packet, *tmp_packet;
-
-        tasklet_disable(&queue->txtask);
-
-        list_for_each_entry_safe(packet, tmp_packet, &queue->txrunning, list)
-            free_txpacket(packet);
-        list_for_each_entry_safe(packet, tmp_packet, &queue->txqueue, list)
-            free_txpacket(packet);
-}
-
-static void b43_destroy_pioqueue(struct b43_pioqueue *queue)
-{
-        if (!queue)
-                return;
-
-        cancel_transfers(queue);
-        kfree(queue);
-}
-
-void b43_pio_free(struct b43_wldev *dev)
-{
-        struct b43_pio *pio;
-
-        if (!b43_using_pio(dev))
-                return;
-        pio = &dev->pio;
-
-        b43_destroy_pioqueue(pio->queue3);
-        pio->queue3 = NULL;
-        b43_destroy_pioqueue(pio->queue2);
-        pio->queue2 = NULL;
-        b43_destroy_pioqueue(pio->queue1);
-        pio->queue1 = NULL;
-        b43_destroy_pioqueue(pio->queue0);
-        pio->queue0 = NULL;
-}
-
-int b43_pio_init(struct b43_wldev *dev)
-{
-        struct b43_pio *pio = &dev->pio;
-        struct b43_pioqueue *queue;
-        int err = -ENOMEM;
-
-        queue = b43_setup_pioqueue(dev, B43_MMIO_PIO1_BASE);
-        if (!queue)
-                goto out;
-        pio->queue0 = queue;
-
-        queue = b43_setup_pioqueue(dev, B43_MMIO_PIO2_BASE);
-        if (!queue)
-                goto err_destroy0;
-        pio->queue1 = queue;
-
-        queue = b43_setup_pioqueue(dev, B43_MMIO_PIO3_BASE);
-        if (!queue)
-                goto err_destroy1;
-        pio->queue2 = queue;
-
-        queue = b43_setup_pioqueue(dev, B43_MMIO_PIO4_BASE);
-        if (!queue)
-                goto err_destroy2;
-        pio->queue3 = queue;
-
-        if (dev->dev->id.revision < 3)
-                dev->irq_savedstate |= B43_IRQ_PIO_WORKAROUND;
-
-        b43dbg(dev->wl, "PIO initialized\n");
-        err = 0;
-      out:
-        return err;
-
-      err_destroy2:
-        b43_destroy_pioqueue(pio->queue2);
-        pio->queue2 = NULL;
-      err_destroy1:
-        b43_destroy_pioqueue(pio->queue1);
-        pio->queue1 = NULL;
-      err_destroy0:
-        b43_destroy_pioqueue(pio->queue0);
-        pio->queue0 = NULL;
-        goto out;
-}
-
-int b43_pio_tx(struct b43_wldev *dev,
-               struct sk_buff *skb, struct ieee80211_tx_control *ctl)
-{
-        struct b43_pioqueue *queue = dev->pio.queue1;
-        struct b43_pio_txpacket *packet;
-
-        B43_WARN_ON(queue->tx_suspended);
-        B43_WARN_ON(list_empty(&queue->txfree));
-
-        packet = list_entry(queue->txfree.next, struct b43_pio_txpacket, list);
-        packet->skb = skb;
-
-        memset(&packet->txstat, 0, sizeof(packet->txstat));
-        memcpy(&packet->txstat.control, ctl, sizeof(*ctl));
-
-        list_move_tail(&packet->list, &queue->txqueue);
-        queue->nr_txfree--;
-        queue->nr_tx_packets++;
-        B43_WARN_ON(queue->nr_txfree >= B43_PIO_MAXTXPACKETS);
-
-        tasklet_schedule(&queue->txtask);
-
-        return 0;
-}
-
-void b43_pio_handle_txstatus(struct b43_wldev *dev,
-                             const struct b43_txstatus *status)
-{
-        struct b43_pioqueue *queue;
-        struct b43_pio_txpacket *packet;
-
-        queue = parse_cookie(dev, status->cookie, &packet);
-        if (B43_WARN_ON(!queue))
-                return;
-
-        queue->tx_devq_packets--;
-        queue->tx_devq_used -=
-            (packet->skb->len + sizeof(struct b43_txhdr_fw4));
-
-        if (status->acked) {
-                packet->txstat.flags |= IEEE80211_TX_STATUS_ACK;
-        } else {
-                if (!(packet->txstat.control.flags & IEEE80211_TXCTL_NO_ACK))
-                        packet->txstat.excessive_retries = 1;
-        }
-        if (status->frame_count == 0) {
-                /* The frame was not transmitted at all. */
-                packet->txstat.retry_count = 0;
-        } else
-                packet->txstat.retry_count = status->frame_count - 1;
-        ieee80211_tx_status_irqsafe(dev->wl->hw, packet->skb,
-                                    &(packet->txstat));
-        packet->skb = NULL;
-
-        free_txpacket(packet);
-        /* If there are packets on the txqueue, poke the tasklet
-         * to transmit them.
-         */
-        if (!list_empty(&queue->txqueue))
-                tasklet_schedule(&queue->txtask);
-}
-
-void b43_pio_get_tx_stats(struct b43_wldev *dev,
-                          struct ieee80211_tx_queue_stats *stats)
-{
-        struct b43_pio *pio = &dev->pio;
-        struct b43_pioqueue *queue;
-        struct ieee80211_tx_queue_stats_data *data;
-
-        queue = pio->queue1;
-        data = &(stats->data[0]);
-        data->len = B43_PIO_MAXTXPACKETS - queue->nr_txfree;
-        data->limit = B43_PIO_MAXTXPACKETS;
-        data->count = queue->nr_tx_packets;
-}
-
-static void pio_rx_error(struct b43_pioqueue *queue,
-                         int clear_buffers, const char *error)
-{
-        int i;
-
-        b43err(queue->dev->wl, "PIO RX error: %s\n", error);
-        b43_pio_write(queue, B43_PIO_RXCTL, B43_PIO_RXCTL_READY);
-        if (clear_buffers) {
-                B43_WARN_ON(queue->mmio_base != B43_MMIO_PIO1_BASE);
-                for (i = 0; i < 15; i++) {
-                        /* Dummy read. */
-                        b43_pio_read(queue, B43_PIO_RXDATA);
-                }
-        }
-}
-
-void b43_pio_rx(struct b43_pioqueue *queue)
-{
-        __le16 preamble[21] = { 0 };
-        struct b43_rxhdr_fw4 *rxhdr;
-        u16 tmp, len;
-        u32 macstat;
-        int i, preamble_readwords;
-        struct sk_buff *skb;
-
-        tmp = b43_pio_read(queue, B43_PIO_RXCTL);
-        if (!(tmp & B43_PIO_RXCTL_DATAAVAILABLE))
-                return;
-        b43_pio_write(queue, B43_PIO_RXCTL, B43_PIO_RXCTL_DATAAVAILABLE);
-
-        for (i = 0; i < 10; i++) {
-                tmp = b43_pio_read(queue, B43_PIO_RXCTL);
-                if (tmp & B43_PIO_RXCTL_READY)
-                        goto data_ready;
-                udelay(10);
-        }
-        b43dbg(queue->dev->wl, "PIO RX timed out\n");
-        return;
-data_ready:
-
-        len = b43_pio_read(queue, B43_PIO_RXDATA);
-        if (unlikely(len > 0x700)) {
-                pio_rx_error(queue, 0, "len > 0x700");
-                return;
-        }
-        if (unlikely(len == 0 && queue->mmio_base != B43_MMIO_PIO4_BASE)) {
-                pio_rx_error(queue, 0, "len == 0");
-                return;
-        }
-        preamble[0] = cpu_to_le16(len);
-        if (queue->mmio_base == B43_MMIO_PIO4_BASE)
-                preamble_readwords = 14 / sizeof(u16);
-        else
-                preamble_readwords = 18 / sizeof(u16);
-        for (i = 0; i < preamble_readwords; i++) {
-                tmp = b43_pio_read(queue, B43_PIO_RXDATA);
-                preamble[i + 1] = cpu_to_le16(tmp);
-        }
-        rxhdr = (struct b43_rxhdr_fw4 *)preamble;
-        macstat = le32_to_cpu(rxhdr->mac_status);
-        if (macstat & B43_RX_MAC_FCSERR) {
-                pio_rx_error(queue,
-                             (queue->mmio_base == B43_MMIO_PIO1_BASE),
-                             "Frame FCS error");
-                return;
-        }
-        if (queue->mmio_base == B43_MMIO_PIO4_BASE) {
-                /* We received an xmit status. */
-                struct b43_hwtxstatus *hw;
-
-                hw = (struct b43_hwtxstatus *)(preamble + 1);
-                b43_handle_hwtxstatus(queue->dev, hw);
-
-                return;
-        }
-
-        skb = dev_alloc_skb(len);
-        if (unlikely(!skb)) {
-                pio_rx_error(queue, 1, "OOM");
-                return;
-        }
-        skb_put(skb, len);
-        for (i = 0; i < len - 1; i += 2) {
-                tmp = b43_pio_read(queue, B43_PIO_RXDATA);
-                *((__le16 *)(skb->data + i)) = cpu_to_le16(tmp);
-        }
-        if (len % 2) {
-                tmp = b43_pio_read(queue, B43_PIO_RXDATA);
-                skb->data[len - 1] = (tmp & 0x00FF);
-/* The specs say the following is required, but
- * it is wrong and corrupts the PLCP. If we don't do
- * this, the PLCP seems to be correct. So ifdef it out for now.
- */
-#if 0
-                if (rxflags2 & B43_RXHDR_FLAGS2_TYPE2FRAME)
-                        skb->data[2] = (tmp & 0xFF00) >> 8;
-                else
-                        skb->data[0] = (tmp & 0xFF00) >> 8;
-#endif
-        }
-        b43_rx(queue->dev, skb, rxhdr);
-}
-
-void b43_pio_tx_suspend(struct b43_pioqueue *queue)
-{
-        b43_power_saving_ctl_bits(queue->dev, B43_PS_AWAKE);
-        b43_pio_write(queue, B43_PIO_TXCTL, b43_pio_read(queue, B43_PIO_TXCTL)
-                      | B43_PIO_TXCTL_SUSPEND);
-}
-
-void b43_pio_tx_resume(struct b43_pioqueue *queue)
-{
-        b43_pio_write(queue, B43_PIO_TXCTL, b43_pio_read(queue, B43_PIO_TXCTL)
-                      & ~B43_PIO_TXCTL_SUSPEND);
-        b43_power_saving_ctl_bits(queue->dev, 0);
-        tasklet_schedule(&queue->txtask);
-}
-
-void b43_pio_freeze_txqueues(struct b43_wldev *dev)
-{
-        struct b43_pio *pio;
-
-        B43_WARN_ON(!b43_using_pio(dev));
-        pio = &dev->pio;
-        pio->queue0->tx_frozen = 1;
-        pio->queue1->tx_frozen = 1;
-        pio->queue2->tx_frozen = 1;
-        pio->queue3->tx_frozen = 1;
-}
-
-void b43_pio_thaw_txqueues(struct b43_wldev *dev)
-{
-        struct b43_pio *pio;
-
-        B43_WARN_ON(!b43_using_pio(dev));
-        pio = &dev->pio;
-        pio->queue0->tx_frozen = 0;
-        pio->queue1->tx_frozen = 0;
-        pio->queue2->tx_frozen = 0;
-        pio->queue3->tx_frozen = 0;
-        if (!list_empty(&pio->queue0->txqueue))
-                tasklet_schedule(&pio->queue0->txtask);
-        if (!list_empty(&pio->queue1->txqueue))
-                tasklet_schedule(&pio->queue1->txtask);
-        if (!list_empty(&pio->queue2->txqueue))
-                tasklet_schedule(&pio->queue2->txtask);
-        if (!list_empty(&pio->queue3->txqueue))
-                tasklet_schedule(&pio->queue3->txtask);
-}
diff --git a/drivers/net/wireless/b43/pio.h b/drivers/net/wireless/b43/pio.h
deleted file mode 100644
index 3488f2447bbf..000000000000
--- a/drivers/net/wireless/b43/pio.h
+++ /dev/null
@@ -1,153 +0,0 @@
-#ifndef B43_PIO_H_
-#define B43_PIO_H_
-
-#include "b43.h"
-
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/list.h>
-#include <linux/skbuff.h>
-
-#define B43_PIO_TXCTL           0x00
-#define B43_PIO_TXDATA          0x02
-#define B43_PIO_TXQBUFSIZE              0x04
-#define B43_PIO_RXCTL           0x08
-#define B43_PIO_RXDATA          0x0A
-
-#define B43_PIO_TXCTL_WRITELO   (1 << 0)
-#define B43_PIO_TXCTL_WRITEHI   (1 << 1)
-#define B43_PIO_TXCTL_COMPLETE  (1 << 2)
-#define B43_PIO_TXCTL_INIT              (1 << 3)
-#define B43_PIO_TXCTL_SUSPEND   (1 << 7)
-
-#define B43_PIO_RXCTL_DATAAVAILABLE     (1 << 0)
-#define B43_PIO_RXCTL_READY             (1 << 1)
-
-/* PIO constants */
-#define B43_PIO_MAXTXDEVQPACKETS        31
-#define B43_PIO_TXQADJUST               80
-
-/* PIO tuning knobs */
-#define B43_PIO_MAXTXPACKETS    256
-
-#ifdef CONFIG_B43_PIO
-
-struct b43_pioqueue;
-struct b43_xmitstatus;
-
-struct b43_pio_txpacket {
-        struct b43_pioqueue *queue;
-        struct sk_buff *skb;
-        struct ieee80211_tx_status txstat;
-        struct list_head list;
-        u16 index; /* Index in the tx_packets_cache */
-};
-
-struct b43_pioqueue {
-        struct b43_wldev *dev;
-        u16 mmio_base;
-
-        bool tx_suspended;
-        bool tx_frozen;
-        bool need_workarounds;  /* Workarounds needed for core.rev < 3 */
-
-        /* Adjusted size of the device internal TX buffer. */
-        u16 tx_devq_size;
-        /* Used octets of the device internal TX buffer. */
-        u16 tx_devq_used;
-        /* Used packet slots in the device internal TX buffer. */
-        u8 tx_devq_packets;
-        /* Packets from the txfree list can
-         * be taken on incoming TX requests.
-         */
-        struct list_head txfree;
-        unsigned int nr_txfree;
-        /* Packets on the txqueue are queued,
-         * but not completely written to the chip, yet.
-         */
-        struct list_head txqueue;
-        /* Packets on the txrunning queue are completely
-         * posted to the device. We are waiting for the txstatus.
-         */
-        struct list_head txrunning;
-        /* Total number or packets sent.
-         * (This counter can obviously wrap).
-         */
-        unsigned int nr_tx_packets;
-        struct tasklet_struct txtask;
-        struct b43_pio_txpacket tx_packets_cache[B43_PIO_MAXTXPACKETS];
-};
-
-static inline u16 b43_pio_read(struct b43_pioqueue *queue, u16 offset)
-{
-        return b43_read16(queue->dev, queue->mmio_base + offset);
-}
-
-static inline
-    void b43_pio_write(struct b43_pioqueue *queue, u16 offset, u16 value)
-{
-        b43_write16(queue->dev, queue->mmio_base + offset, value);
-        mmiowb();
-}
-
-int b43_pio_init(struct b43_wldev *dev);
-void b43_pio_free(struct b43_wldev *dev);
-
-int b43_pio_tx(struct b43_wldev *dev,
-               struct sk_buff *skb, struct ieee80211_tx_control *ctl);
-void b43_pio_handle_txstatus(struct b43_wldev *dev,
-                             const struct b43_txstatus *status);
-void b43_pio_get_tx_stats(struct b43_wldev *dev,
-                          struct ieee80211_tx_queue_stats *stats);
-void b43_pio_rx(struct b43_pioqueue *queue);
-
-/* Suspend TX queue in hardware. */
-void b43_pio_tx_suspend(struct b43_pioqueue *queue);
-void b43_pio_tx_resume(struct b43_pioqueue *queue);
-/* Suspend (freeze) the TX tasklet (software level). */
-void b43_pio_freeze_txqueues(struct b43_wldev *dev);
-void b43_pio_thaw_txqueues(struct b43_wldev *dev);
-
-#else /* CONFIG_B43_PIO */
-
-static inline int b43_pio_init(struct b43_wldev *dev)
-{
-        return 0;
-}
-static inline void b43_pio_free(struct b43_wldev *dev)
-{
-}
-static inline
-    int b43_pio_tx(struct b43_wldev *dev,
-                   struct sk_buff *skb, struct ieee80211_tx_control *ctl)
-{
-        return 0;
-}
-static inline
-    void b43_pio_handle_txstatus(struct b43_wldev *dev,
-                                 const struct b43_txstatus *status)
-{
-}
-static inline
-    void b43_pio_get_tx_stats(struct b43_wldev *dev,
-                              struct ieee80211_tx_queue_stats *stats)
-{
-}
-static inline void b43_pio_rx(struct b43_pioqueue *queue)
-{
-}
-static inline void b43_pio_tx_suspend(struct b43_pioqueue *queue)
-{
-}
-static inline void b43_pio_tx_resume(struct b43_pioqueue *queue)
-{
-}
-static inline void b43_pio_freeze_txqueues(struct b43_wldev *dev)
-{
-}
-static inline void b43_pio_thaw_txqueues(struct b43_wldev *dev)
-{
-}
-
-#endif /* CONFIG_B43_PIO */
-#endif /* B43_PIO_H_ */