[PATCH v3] lpc32xx: Added ethernet driver

[Kevin Wells]

>This patch adds an ethernet driver for the LPC32xx ARM SoC.
>
>Signed-off-by: Roland Stigge <stigge at antcom.de>
>
>---
> drivers/net/ethernet/Kconfig       |    1 
> drivers/net/ethernet/Makefile      |    1 
> drivers/net/ethernet/nxp/Kconfig   |    8 
> drivers/net/ethernet/nxp/Makefile  |    1 
> drivers/net/ethernet/nxp/lpc_eth.c | 1311 +++++++++++++++++++++++++++++++++++++
> drivers/net/ethernet/nxp/lpc_eth.h |  336 +++++++++
> 6 files changed, 1658 insertions(+)

...

>+#define ENET_MAXF_SIZE 1536
>+#define ENET_RX_DESC 48
>+#define ENET_TX_DESC 16
>+
>+/*
>+ * FIXME
>+ * Dynamic buffer allocation as needed
>+ * Check/fix ethtool support
>+ * Better MAC address support
>+ * Better DMA allocation support (dma pool)
>+ */

Although the packet buffers are handled correctly, the
number of MAC DMA descriptors are hard coded to the
ENET_RX_DESC and ENET_TX_DESC size values. There is
also a 'funky' scheme for doing virt<>phy address
translation for the descriptors.

I'm ok with releasing this driver "as is" with its
current quirks, but I do think these fixmes need to be
fixed at some time.