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b43: Changes to enable BCM4311 rev 02 with wireless core revision 13

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The BCM94311MCG rev 02 chip has an 802.11 core with revision 13 and
has not been supported until now. The changes include the following:

(1) Add the 802.11 rev 13 device to the ssb_device_id table to load b43.
(2) Add PHY revision 9 to the supported list.
(3) Change the 2-bit routing code for address extensions to 0b10 rather
    than the 0b01 used for the 32-bit case.
(4) Remove some magic numbers in the DMA setup.

The DMA implementation for this chip supports full 64-bit addressing with
one exception. Whenever the Descriptor Ring Buffer is in high memory, a
fatal DMA error occurs. This problem was not present in 2.6.24-rc2 due
to code to "Bias the placement of kernel pages at lower PFNs". When
commit 44048d70 reverted that code, the DMA error appeared. As a "fix",
use the GFP_DMA flag when allocating the buffer for 64-bit DMA. At present,
this problem is thought to arise from a hardware error.

This patch has been tested on my system and by Cédric Caumont
<icare40@hotmail.com>.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Acked-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Larry Finger 2007-11-26 10:29:47 -06:00 committed by David S. Miller
parent 00e0b8cb74
commit 013978b688
3 changed files with 25 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

30
drivers/net/wireless/b43/dma.c
View file

@ -165,7 +165,7 @@ static void op64_fill_descriptor(struct b43_dmaring *ring,
addrhi = (((u64) dmaaddr >> 32) & ~SSB_DMA_TRANSLATION_MASK);
addrext = (((u64) dmaaddr >> 32) & SSB_DMA_TRANSLATION_MASK)
>> SSB_DMA_TRANSLATION_SHIFT;
addrhi |= ssb_dma_translation(ring->dev->dev);
addrhi |= (ssb_dma_translation(ring->dev->dev) << 1);
if (slot == ring->nr_slots - 1)
ctl0 |= B43_DMA64_DCTL0_DTABLEEND;
if (start)
@ -426,9 +426,21 @@ static inline
static int alloc_ringmemory(struct b43_dmaring *ring)
{
struct device *dev = ring->dev->dev->dev;
gfp_t flags = GFP_KERNEL;
/* The specs call for 4K buffers for 30- and 32-bit DMA with 4K
* alignment and 8K buffers for 64-bit DMA with 8K alignment. Testing
* has shown that 4K is sufficient for the latter as long as the buffer
* does not cross an 8K boundary.
*
* For unknown reasons - possibly a hardware error - the BCM4311 rev
* 02, which uses 64-bit DMA, needs the ring buffer in very low memory,
* which accounts for the GFP_DMA flag below.
*/
if (ring->dma64)
flags |= GFP_DMA;
ring->descbase = dma_alloc_coherent(dev, B43_DMA_RINGMEMSIZE,
&(ring->dmabase), GFP_KERNEL);
&(ring->dmabase), flags);
if (!ring->descbase) {
b43err(ring->dev->wl, "DMA ringmemory allocation failed\n");
return -ENOMEM;
@ -483,7 +495,7 @@ int b43_dmacontroller_rx_reset(struct b43_wldev *dev, u16 mmio_base, int dma64)
return 0;
}
/* Reset the RX DMA channel */
/* Reset the TX DMA channel */
int b43_dmacontroller_tx_reset(struct b43_wldev *dev, u16 mmio_base, int dma64)
{
int i;
@ -647,7 +659,7 @@ static int dmacontroller_setup(struct b43_dmaring *ring)
b43_dma_write(ring, B43_DMA64_TXRINGHI,
((ringbase >> 32) &
~SSB_DMA_TRANSLATION_MASK)
| trans);
| (trans << 1));
} else {
u32 ringbase = (u32) (ring->dmabase);
@ -680,8 +692,9 @@ static int dmacontroller_setup(struct b43_dmaring *ring)
b43_dma_write(ring, B43_DMA64_RXRINGHI,
((ringbase >> 32) &
~SSB_DMA_TRANSLATION_MASK)
| trans);
b43_dma_write(ring, B43_DMA64_RXINDEX, 200);
| (trans << 1));
b43_dma_write(ring, B43_DMA64_RXINDEX, ring->nr_slots *
sizeof(struct b43_dmadesc64));
} else {
u32 ringbase = (u32) (ring->dmabase);
@ -695,11 +708,12 @@ static int dmacontroller_setup(struct b43_dmaring *ring)
b43_dma_write(ring, B43_DMA32_RXRING,
(ringbase & ~SSB_DMA_TRANSLATION_MASK)
| trans);
b43_dma_write(ring, B43_DMA32_RXINDEX, 200);
b43_dma_write(ring, B43_DMA32_RXINDEX, ring->nr_slots *
sizeof(struct b43_dmadesc32));
}
}
out:
out:
return err;
}

3
drivers/net/wireless/b43/main.c
View file

@ -93,6 +93,7 @@ static const struct ssb_device_id b43_ssb_tbl[] = {
SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, 7),
SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, 9),
SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, 10),
SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, 13),
SSB_DEVTABLE_END
};
@ -3078,7 +3079,7 @@ static int b43_phy_versioning(struct b43_wldev *dev)
unsupported = 1;
break;
case B43_PHYTYPE_G:
if (phy_rev > 8)
if (phy_rev > 9)
unsupported = 1;
break;
default:

1
drivers/net/wireless/b43/wa.c
View file

@ -642,6 +642,7 @@ void b43_wa_all(struct b43_wldev *dev)
case 6:
case 7:
case 8:
case 9:
b43_wa_tr_ltov(dev);
b43_wa_crs_ed(dev);
b43_wa_rssi_lt(dev);