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staging: brcm80211: removed unused MIPS specific SDRAM swap window

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Certain Mips based, big endian Broadcom products contain a memory window
for endianness swap purposes. However, this is too system specific for
this driver as there are more big endian platforms to support. Thus, this
'window' functionality is not to be used and can be removed.

The swap window would be a performance improvement and could be provided
with a dedicated mapping function in the platform specific code.

Tested on BCM63281.

Reviewed-by: Henry Ptasinski <henryp@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Tested-by: Jonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Roland Vossen
2011-08-15 15:34:27 +02:00
committed by Greg Kroah-Hartman
parent adf27befdc
commit dcaf762fa4
2 changed files with 0 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/staging/brcm80211/brcmsmac/aiutils.h
View File

@@ -30,8 +30,6 @@
#define SI_PCI_MEM_SZ (64 * 1024 * 1024)
/* Host Mode sb2pcitranslation1 (64 MB) */
#define SI_PCI_CFG 0x0c000000
/* Byteswapped Physical SDRAM */
#define SI_SDRAM_SWAPPED 0x10000000
/* Region 2 for sdram (512 MB) */
#define SI_SDRAM_R2 0x80000000

8
drivers/staging/brcm80211/brcmsmac/dma.c
View File

@@ -442,9 +442,6 @@ struct dma_pub *dma_attach(char *name, struct si_pub *sih,
di->ddoffsethigh = SI_PCIE_DMA_H32;
di->dataoffsetlow = di->ddoffsetlow;
di->dataoffsethigh = di->ddoffsethigh;
#if defined(__mips__) && defined(IL_BIGENDIAN)
di->dataoffsetlow = di->dataoffsetlow + SI_SDRAM_SWAPPED;
#endif /* defined(__mips__) && defined(IL_BIGENDIAN) */
/* WAR64450 : DMACtl.Addr ext fields are not supported in SDIOD core. */
if ((ai_coreid(sih) == SDIOD_CORE_ID)
&& ((ai_corerev(sih) > 0) && (ai_corerev(sih) <= 2)))
@@ -570,12 +567,7 @@ dma64_dd_upd(struct dma_info *di, struct dma64desc *ddring,
u32 ctrl2 = bufcount & D64_CTRL2_BC_MASK;
/* PCI bus with big(>1G) physical address, use address extension */
#if defined(__mips__) && defined(IL_BIGENDIAN)
if ((di->dataoffsetlow == SI_SDRAM_SWAPPED)
|| !(pa & PCI32ADDR_HIGH)) {
#else
if ((di->dataoffsetlow == 0) || !(pa & PCI32ADDR_HIGH)) {
#endif /* defined(__mips__) && defined(IL_BIGENDIAN) */
ddring[outidx].addrlow = cpu_to_le32(pa + di->dataoffsetlow);
ddring[outidx].addrhigh = cpu_to_le32(di->dataoffsethigh);
ddring[outidx].ctrl1 = cpu_to_le32(*flags);