bcm63xx_enet: add support Broadcom BCM6345 Ethernet
This patch adds support for the Broadcom BCM6345 SoC Ethernet. BCM6345
has a slightly different and older DMA engine which requires the
following modifications:
- the width of the DMA channels on BCM6345 is 64 bytes vs 16 bytes,
which means that the helpers enet_dma{c,s} need to account for this
channel width and we can no longer use macros
- BCM6345 DMA engine does not have any internal SRAM for transfering
buffers
- BCM6345 buffer allocation and flow control is not per-channel but
global (done in RSET_ENETDMA)
- the DMA engine bits are right-shifted by 3 compared to other DMA
generations
- the DMA enable/interrupt masks are a little different (we need to
enabled more bits for 6345)
- some register have the same meaning but are offsetted in the ENET_DMAC
space so a lookup table is required to return the proper offset
The MAC itself is identical and requires no modifications to work.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.h b/drivers/net/ethernet/broadcom/bcm63xx_enet.h
index 721ffba..f55af43 100644
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.h
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.h
@@ -339,6 +339,21 @@
/* used to poll switch port state */
struct timer_list swphy_poll;
spinlock_t enetsw_mdio_lock;
+
+ /* dma channel enable mask */
+ u32 dma_chan_en_mask;
+
+ /* dma channel interrupt mask */
+ u32 dma_chan_int_mask;
+
+ /* DMA engine has internal SRAM */
+ bool dma_has_sram;
+
+ /* dma channel width */
+ unsigned int dma_chan_width;
+
+ /* dma descriptor shift value */
+ unsigned int dma_desc_shift;
};