diff options
Diffstat (limited to 'package/mac80211/patches/830-b43-workaround-pcie-bcm4716.patch')
| -rw-r--r-- | package/mac80211/patches/830-b43-workaround-pcie-bcm4716.patch | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/package/mac80211/patches/830-b43-workaround-pcie-bcm4716.patch b/package/mac80211/patches/830-b43-workaround-pcie-bcm4716.patch new file mode 100644 index 000000000..ce9ad7d5c --- /dev/null +++ b/package/mac80211/patches/830-b43-workaround-pcie-bcm4716.patch @@ -0,0 +1,134 @@ +From 4f214b1ead0af7439921637645cb63f378516175 Mon Sep 17 00:00:00 2001 +From: Hauke Mehrtens <hauke@hauke-m.de> +Date: Sat, 21 Jan 2012 18:48:38 +0100 +Subject: [PATCH 33/34] b43: add workaround for b43 on pcie bus of bcm4716. + +bcm4716 (which includes 4717 & 4718), plus 4706 on PCIe can reorder +transactions. As a fix, a read after write is performed on certain +places in the code. Older chips and the newer 5357 family don't require +this fix. +This code is based on the brcmsmac driver. + +Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> +--- + drivers/net/wireless/b43/b43.h | 26 ++++++++++++++++++++++++++ + drivers/net/wireless/b43/bus.h | 10 ++++++++++ + drivers/net/wireless/b43/phy_common.c | 6 ++++++ + drivers/net/wireless/b43/phy_n.c | 10 +++++----- + 4 files changed, 47 insertions(+), 5 deletions(-) + +--- a/drivers/net/wireless/b43/b43.h ++++ b/drivers/net/wireless/b43/b43.h +@@ -1048,6 +1048,32 @@ static inline bool b43_using_pio_transfe + return dev->__using_pio_transfers; + } + ++/* ++ * bcm4716 (which includes 4717 & 4718), plus 4706 on PCIe can reorder ++ * transactions. As a fix, a read after write is performed on certain places ++ * in the code. Older chips and the newer 5357 family don't require this fix. ++ */ ++#ifdef CONFIG_BCM47XX_BCMA ++#include <asm/mach-bcm47xx/bcm47xx.h> ++static inline void b43_wflush16(struct b43_wldev *dev, u16 offset, u16 value) ++{ ++ if (b43_bus_host_is_pci(dev->dev) && ++ bcm47xx_bus_type == BCM47XX_BUS_TYPE_BCMA && ++ (bcm47xx_bus.bcma.bus.chipinfo.id == 0x4716 || ++ bcm47xx_bus.bcma.bus.chipinfo.id == 0x5300)) { ++ b43_write16(dev, offset, value); ++ b43_read16(dev, offset); ++ } else { ++ b43_write16(dev, offset, value); ++ } ++} ++#else ++static inline void b43_wflush16(struct b43_wldev *dev, u16 offset, u16 value) ++{ ++ b43_write16(dev, offset, value); ++} ++#endif ++ + /* Message printing */ + __printf(2, 3) void b43info(struct b43_wl *wl, const char *fmt, ...); + __printf(2, 3) void b43err(struct b43_wl *wl, const char *fmt, ...); +--- a/drivers/net/wireless/b43/bus.h ++++ b/drivers/net/wireless/b43/bus.h +@@ -60,6 +60,16 @@ static inline bool b43_bus_host_is_sdio( + return (dev->bus_type == B43_BUS_SSB && + dev->sdev->bus->bustype == SSB_BUSTYPE_SDIO); + } ++static inline bool b43_bus_host_is_pci(struct b43_bus_dev *dev) ++{ ++ if (dev->bus_type == B43_BUS_SSB) ++ return (dev->sdev->bus->bustype == SSB_BUSTYPE_PCI); ++#ifdef CONFIG_B43_BCMA ++ if (dev->bus_type == B43_BUS_BCMA) ++ return (dev->bdev->bus->hosttype == BCMA_HOSTTYPE_PCI); ++#endif ++ return false; ++} + + struct b43_bus_dev *b43_bus_dev_bcma_init(struct bcma_device *core); + struct b43_bus_dev *b43_bus_dev_ssb_init(struct ssb_device *sdev); +--- a/drivers/net/wireless/b43/phy_common.c ++++ b/drivers/net/wireless/b43/phy_common.c +@@ -266,6 +266,12 @@ void b43_phy_write(struct b43_wldev *dev + { + assert_mac_suspended(dev); + dev->phy.ops->phy_write(dev, reg, value); ++#ifdef CONFIG_BCM47XX ++ if (b43_bus_host_is_pci(dev->dev) && reg == 0x72) { ++ b43_read16(dev, B43_MMIO_PHY_VER); ++ return; ++ } ++#endif + if (++dev->phy.writes_counter == B43_MAX_WRITES_IN_ROW) { + b43_read16(dev, B43_MMIO_PHY_VER); + dev->phy.writes_counter = 0; +--- a/drivers/net/wireless/b43/phy_n.c ++++ b/drivers/net/wireless/b43/phy_n.c +@@ -5423,14 +5423,14 @@ static inline void check_phyreg(struct b + static u16 b43_nphy_op_read(struct b43_wldev *dev, u16 reg) + { + check_phyreg(dev, reg); +- b43_write16(dev, B43_MMIO_PHY_CONTROL, reg); ++ b43_wflush16(dev, B43_MMIO_PHY_CONTROL, reg); + return b43_read16(dev, B43_MMIO_PHY_DATA); + } + + static void b43_nphy_op_write(struct b43_wldev *dev, u16 reg, u16 value) + { + check_phyreg(dev, reg); +- b43_write16(dev, B43_MMIO_PHY_CONTROL, reg); ++ b43_wflush16(dev, B43_MMIO_PHY_CONTROL, reg); + b43_write16(dev, B43_MMIO_PHY_DATA, value); + } + +@@ -5438,7 +5438,7 @@ static void b43_nphy_op_maskset(struct b + u16 set) + { + check_phyreg(dev, reg); +- b43_write16(dev, B43_MMIO_PHY_CONTROL, reg); ++ b43_wflush16(dev, B43_MMIO_PHY_CONTROL, reg); + b43_maskset16(dev, B43_MMIO_PHY_DATA, mask, set); + } + +@@ -5449,7 +5449,7 @@ static u16 b43_nphy_op_radio_read(struct + /* N-PHY needs 0x100 for read access */ + reg |= 0x100; + +- b43_write16(dev, B43_MMIO_RADIO_CONTROL, reg); ++ b43_wflush16(dev, B43_MMIO_RADIO_CONTROL, reg); + return b43_read16(dev, B43_MMIO_RADIO_DATA_LOW); + } + +@@ -5458,7 +5458,7 @@ static void b43_nphy_op_radio_write(stru + /* Register 1 is a 32-bit register. */ + B43_WARN_ON(reg == 1); + +- b43_write16(dev, B43_MMIO_RADIO_CONTROL, reg); ++ b43_wflush16(dev, B43_MMIO_RADIO_CONTROL, reg); + b43_write16(dev, B43_MMIO_RADIO_DATA_LOW, value); + } + |