int b43_switch_channel(struct b43_wldev *dev, unsigned int new_channel)
{
struct b43_phy *phy = &(dev->phy);
u16 channelcookie, savedcookie;
int err;
if (new_channel == B43_DEFAULT_CHANNEL)
new_channel = phy->ops->get_default_chan(dev);
/* First we set the channel radio code to prevent the
* firmware from sending ghost packets.
*/
channelcookie = new_channel;
if (b43_current_band(dev->wl) == IEEE80211_BAND_5GHZ)
channelcookie |= B43_SHM_SH_CHAN_5GHZ;
/* FIXME: set 40Mhz flag if required */
if (0)
channelcookie |= B43_SHM_SH_CHAN_40MHZ;
savedcookie = b43_shm_read16(dev, B43_SHM_SHARED, B43_SHM_SH_CHAN);
b43_shm_write16(dev, B43_SHM_SHARED, B43_SHM_SH_CHAN, channelcookie);
/* Now try to switch the PHY hardware channel. */
err = phy->ops->switch_channel(dev, new_channel);
if (err)
goto err_restore_cookie;
dev->phy.channel = new_channel;
/* Wait for the radio to tune to the channel and stabilize. */
msleep(8);
return 0;
err_restore_cookie:
b43_shm_write16(dev, B43_SHM_SHARED,
B43_SHM_SH_CHAN, savedcookie);
return err;
}
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 int pio_tx_frame(struct b43_pio_txqueue *q,
struct sk_buff *skb)
{
struct b43_wldev *dev = q->dev;
struct b43_wl *wl = dev->wl;
struct b43_pio_txpacket *pack;
u16 cookie;
int err;
unsigned int hdrlen;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct b43_txhdr *txhdr = (struct b43_txhdr *)wl->pio_scratchspace;
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(dev);
BUILD_BUG_ON(sizeof(wl->pio_scratchspace) < sizeof(struct b43_txhdr));
B43_WARN_ON(sizeof(wl->pio_scratchspace) < hdrlen);
err = b43_generate_txhdr(dev, (u8 *)txhdr, skb,
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(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;
}
static int pio_tx_frame(struct b43_pio_txqueue *q,
struct sk_buff *skb)
{
struct b43_wldev *dev = q->dev;
struct b43_wl *wl = dev->wl;
struct b43_pio_txpacket *pack;
u16 cookie;
int err;
unsigned int hdrlen;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct b43_txhdr *txhdr = (struct b43_txhdr *)wl->pio_scratchspace;
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(dev);
BUILD_BUG_ON(sizeof(wl->pio_scratchspace) < sizeof(struct b43_txhdr));
B43_WARN_ON(sizeof(wl->pio_scratchspace) < hdrlen);
err = b43_generate_txhdr(dev, (u8 *)txhdr, skb,
info, cookie);
if (err)
return err;
if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
b43_shm_write16(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);
list_del(&pack->list);
q->buffer_used += roundup(skb->len + hdrlen, 4);
q->free_packet_slots -= 1;
return 0;
}
static void lo_read_power_vector(struct b43_wldev *dev)
{
struct b43_phy *phy = &dev->phy;
struct b43_txpower_lo_control *lo = phy->lo_control;
u16 i;
u64 tmp;
u64 power_vector = 0;
int rf_offset, bb_offset;
struct b43_loctl *loctl;
for (i = 0; i < 8; i += 2) {
tmp = b43_shm_read16(dev, B43_SHM_SHARED, 0x310 + i);
/* Clear the top byte. We get holes in the bitmap... */
tmp &= 0xFF;
power_vector |= (tmp << (i * 8));
/* Clear the vector on the device. */
b43_shm_write16(dev, B43_SHM_SHARED, 0x310 + i, 0);
}
if (power_vector)
lo->power_vector = power_vector;
power_vector = lo->power_vector;
for (i = 0; i < 64; i++) {
if (power_vector & ((u64) 1ULL << i)) {
/* Now figure out which b43_loctl corresponds
* to this bit.
*/
rf_offset = i / lo->rfatt_list.len;
bb_offset = i % lo->rfatt_list.len; //FIXME?
loctl =
b43_get_lo_g_ctl(dev,
&lo->rfatt_list.list[rf_offset],
&lo->bbatt_list.list[bb_offset]);
/* And mark it as "used", as the device told us
* through the bitmap it is using it.
*/
loctl->used = 1;
}
}
}
static int dma_tx_fragment(struct b43_dmaring *ring,
struct sk_buff *skb)
{
const struct b43_dma_ops *ops = ring->ops;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct b43_private_tx_info *priv_info = b43_get_priv_tx_info(info);
u8 *header;
int slot, old_top_slot, old_used_slots;
int err;
struct b43_dmadesc_generic *desc;
struct b43_dmadesc_meta *meta;
struct b43_dmadesc_meta *meta_hdr;
u16 cookie;
size_t hdrsize = b43_txhdr_size(ring->dev);
/* Important note: If the number of used DMA slots per TX frame
* is changed here, the TX_SLOTS_PER_FRAME definition at the top of
* the file has to be updated, too!
*/
old_top_slot = ring->current_slot;
old_used_slots = ring->used_slots;
/* Get a slot for the header. */
slot = request_slot(ring);
desc = ops->idx2desc(ring, slot, &meta_hdr);
memset(meta_hdr, 0, sizeof(*meta_hdr));
header = &(ring->txhdr_cache[(slot / TX_SLOTS_PER_FRAME) * hdrsize]);
cookie = generate_cookie(ring, slot);
err = b43_generate_txhdr(ring->dev, header,
skb, info, cookie);
if (unlikely(err)) {
ring->current_slot = old_top_slot;
ring->used_slots = old_used_slots;
return err;
}
meta_hdr->dmaaddr = map_descbuffer(ring, (unsigned char *)header,
hdrsize, 1);
if (b43_dma_mapping_error(ring, meta_hdr->dmaaddr, hdrsize, 1)) {
ring->current_slot = old_top_slot;
ring->used_slots = old_used_slots;
return -EIO;
}
ops->fill_descriptor(ring, desc, meta_hdr->dmaaddr,
hdrsize, 1, 0, 0);
/* Get a slot for the payload. */
slot = request_slot(ring);
desc = ops->idx2desc(ring, slot, &meta);
memset(meta, 0, sizeof(*meta));
meta->skb = skb;
meta->is_last_fragment = true;
priv_info->bouncebuffer = NULL;
meta->dmaaddr = map_descbuffer(ring, skb->data, skb->len, 1);
/* create a bounce buffer in zone_dma on mapping failure. */
if (b43_dma_mapping_error(ring, meta->dmaaddr, skb->len, 1)) {
priv_info->bouncebuffer = kmemdup(skb->data, skb->len,
GFP_ATOMIC | GFP_DMA);
if (!priv_info->bouncebuffer) {
ring->current_slot = old_top_slot;
ring->used_slots = old_used_slots;
err = -ENOMEM;
goto out_unmap_hdr;
}
meta->dmaaddr = map_descbuffer(ring, priv_info->bouncebuffer, skb->len, 1);
if (b43_dma_mapping_error(ring, meta->dmaaddr, skb->len, 1)) {
kfree(priv_info->bouncebuffer);
priv_info->bouncebuffer = NULL;
ring->current_slot = old_top_slot;
ring->used_slots = old_used_slots;
err = -EIO;
goto out_unmap_hdr;
}
}
ops->fill_descriptor(ring, desc, meta->dmaaddr, skb->len, 0, 1, 1);
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(ring->dev, B43_SHM_SHARED,
B43_SHM_SH_MCASTCOOKIE, cookie);
}
/* Now transfer the whole frame. */
wmb();
ops->poke_tx(ring, next_slot(ring, slot));
return 0;
out_unmap_hdr:
unmap_descbuffer(ring, meta_hdr->dmaaddr,
hdrsize, 1);
return err;
}
static int dma_tx_fragment(struct b43_dmaring *ring,
struct sk_buff *skb)
{
const struct b43_dma_ops *ops = ring->ops;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct b43_private_tx_info *priv_info = b43_get_priv_tx_info(info);
u8 *header;
int slot, old_top_slot, old_used_slots;
int err;
struct b43_dmadesc_generic *desc;
struct b43_dmadesc_meta *meta;
struct b43_dmadesc_meta *meta_hdr;
u16 cookie;
size_t hdrsize = b43_txhdr_size(ring->dev);
old_top_slot = ring->current_slot;
old_used_slots = ring->used_slots;
slot = request_slot(ring);
desc = ops->idx2desc(ring, slot, &meta_hdr);
memset(meta_hdr, 0, sizeof(*meta_hdr));
header = &(ring->txhdr_cache[(slot / TX_SLOTS_PER_FRAME) * hdrsize]);
cookie = generate_cookie(ring, slot);
err = b43_generate_txhdr(ring->dev, header,
skb, info, cookie);
if (unlikely(err)) {
ring->current_slot = old_top_slot;
ring->used_slots = old_used_slots;
return err;
}
meta_hdr->dmaaddr = map_descbuffer(ring, (unsigned char *)header,
hdrsize, 1);
if (b43_dma_mapping_error(ring, meta_hdr->dmaaddr, hdrsize, 1)) {
ring->current_slot = old_top_slot;
ring->used_slots = old_used_slots;
return -EIO;
}
ops->fill_descriptor(ring, desc, meta_hdr->dmaaddr,
hdrsize, 1, 0, 0);
slot = request_slot(ring);
desc = ops->idx2desc(ring, slot, &meta);
memset(meta, 0, sizeof(*meta));
meta->skb = skb;
meta->is_last_fragment = true;
priv_info->bouncebuffer = NULL;
meta->dmaaddr = map_descbuffer(ring, skb->data, skb->len, 1);
if (b43_dma_mapping_error(ring, meta->dmaaddr, skb->len, 1)) {
priv_info->bouncebuffer = kmemdup(skb->data, skb->len,
GFP_ATOMIC | GFP_DMA);
if (!priv_info->bouncebuffer) {
ring->current_slot = old_top_slot;
ring->used_slots = old_used_slots;
err = -ENOMEM;
goto out_unmap_hdr;
}
meta->dmaaddr = map_descbuffer(ring, priv_info->bouncebuffer, skb->len, 1);
if (b43_dma_mapping_error(ring, meta->dmaaddr, skb->len, 1)) {
kfree(priv_info->bouncebuffer);
priv_info->bouncebuffer = NULL;
ring->current_slot = old_top_slot;
ring->used_slots = old_used_slots;
err = -EIO;
goto out_unmap_hdr;
}
}
ops->fill_descriptor(ring, desc, meta->dmaaddr, skb->len, 0, 1, 1);
if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
b43_shm_write16(ring->dev, B43_SHM_SHARED,
B43_SHM_SH_MCASTCOOKIE, cookie);
}
wmb();
ops->poke_tx(ring, next_slot(ring, slot));
return 0;
out_unmap_hdr:
unmap_descbuffer(ring, meta_hdr->dmaaddr,
hdrsize, 1);
return err;
}
