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authorRafał Miłecki <zajec5@gmail.com>2013-01-08 20:06:23 +0000
committerDavid S. Miller <davem@davemloft.net>2013-01-09 23:37:03 -0800
commitdd4544f05469aaaeee891d7dc54d66430344321e (patch)
treecf40cf96b106a2862dea62dfb730bccbe300124c /drivers/bcma
parentaaeb6cdfa5c07533c2cd6d2c381374c69f7db9dc (diff)
downloadvexpress-lsk-dd4544f05469aaaeee891d7dc54d66430344321e.tar.gz
bgmac: driver for GBit MAC core on BCMA bus
BCMA is a Broadcom specific bus with devices AKA cores. All recent BCMA based SoCs have gigabit ethernet provided by the GBit MAC core. This patch adds driver for such a cores registering itself as a netdev. It has been tested on a BCM4706 and BCM4718 chipsets. In the kernel tree there is already b44 driver which has some common things with bgmac, however there are many differences that has led to the decision or writing a new driver: 1) GBit MAC cores appear on BCMA bus (not SSB as in case of b44) 2) There is 64bit DMA engine which differs from 32bit one 3) There is no CAM (Content Addressable Memory) in GBit MAC 4) We have 4 TX queues on GBit MAC devices (instead of 1) 5) Many registers have different addresses/values 6) RX header flags are also different The driver in it's state is functional how, however there is of course place for improvements: 1) Supporting more net_device_ops 2) SUpporting more ethtool_ops 3) Unaligned addressing in DMA 4) Writing separated PHY driver Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/bcma')
-rw-r--r--drivers/bcma/driver_chipcommon_pmu.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/bcma/driver_chipcommon_pmu.c b/drivers/bcma/driver_chipcommon_pmu.c
index c62c788b328..932b101dee3 100644
--- a/drivers/bcma/driver_chipcommon_pmu.c
+++ b/drivers/bcma/driver_chipcommon_pmu.c
@@ -264,7 +264,7 @@ static u32 bcma_pmu_pll_clock_bcm4706(struct bcma_drv_cc *cc, u32 pll0, u32 m)
}
/* query bus clock frequency for PMU-enabled chipcommon */
-static u32 bcma_pmu_get_bus_clock(struct bcma_drv_cc *cc)
+u32 bcma_pmu_get_bus_clock(struct bcma_drv_cc *cc)
{
struct bcma_bus *bus = cc->core->bus;
@@ -293,6 +293,7 @@ static u32 bcma_pmu_get_bus_clock(struct bcma_drv_cc *cc)
}
return BCMA_CC_PMU_HT_CLOCK;
}
+EXPORT_SYMBOL_GPL(bcma_pmu_get_bus_clock);
/* query cpu clock frequency for PMU-enabled chipcommon */
u32 bcma_pmu_get_cpu_clock(struct bcma_drv_cc *cc)