net: Add support for the KS8695 ethernet devices.

Implements the KS8695 ethernet device (ks8695net).

This driver is only of use on the KS8695 which is an ARM9 based SoC. The
documentation on this SoC is sparse and poor, with barely a register
description and a rough outline of how the ethernet works, this driver was
therefore written with strong reference to the Micrel supplied Linux 2.6.9
port, and to Andrew Victor's ks8695eth driver.

Signed-off-by: Daniel Silverstone <dsilvers@simtec.co.uk>
Signed-off-by: Vincent Sanders <vince@simtec.co.uk>
Acked-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/arm/Kconfig

@@ -40,6 +40,14 @@ config ARM_AT91_ETHER
 	  If you wish to compile a kernel for the AT91RM9200 and enable
 	  ethernet support, then you should always answer Y to this.
 
+config ARM_KS8695_ETHER
+	tristate "KS8695 Ethernet support"
+	depends on ARM && ARCH_KS8695
+	select MII
+	help
+	  If you wish to compile a kernel for the KS8695 and want to
+	  use the internal ethernet then you should answer Y to this.
+
 config EP93XX_ETH
 	tristate "EP93xx Ethernet support"
 	depends on ARM && ARCH_EP93XX

drivers/net/arm/Makefile

@@ -8,5 +8,6 @@ obj-$(CONFIG_ARM_ETHERH)	+= etherh.o ../8390.o
 obj-$(CONFIG_ARM_ETHER3)	+= ether3.o
 obj-$(CONFIG_ARM_ETHER1)	+= ether1.o
 obj-$(CONFIG_ARM_AT91_ETHER)	+= at91_ether.o
+obj-$(CONFIG_ARM_KS8695_ETHER)	+= ks8695net.o
 obj-$(CONFIG_EP93XX_ETH)	+= ep93xx_eth.o
 obj-$(CONFIG_IXP4XX_ETH)	+= ixp4xx_eth.o

drivers/net/arm/ks8695net.h

@@ -0,0 +1,107 @@
+/*
+ * Micrel KS8695 (Centaur) Ethernet.
+ *
+ * Copyright 2008 Simtec Electronics
+ *		  Daniel Silverstone <dsilvers@simtec.co.uk>
+ *		  Vincent Sanders <vince@simtec.co.uk>
+ */
+
+#ifndef KS8695NET_H
+#define KS8695NET_H
+
+/* Receive descriptor flags */
+#define RDES_OWN	(1 << 31)	/* Ownership */
+#define RDES_FS		(1 << 30)	/* First Descriptor */
+#define RDES_LS		(1 << 29)	/* Last Descriptor */
+#define RDES_IPE	(1 << 28)	/* IP Checksum error */
+#define RDES_TCPE	(1 << 27)	/* TCP Checksum error */
+#define RDES_UDPE	(1 << 26)	/* UDP Checksum error */
+#define RDES_ES		(1 << 25)	/* Error summary */
+#define RDES_MF		(1 << 24)	/* Multicast Frame */
+#define RDES_RE		(1 << 19)	/* MII Error reported */
+#define RDES_TL		(1 << 18)	/* Frame too Long */
+#define RDES_RF		(1 << 17)	/* Runt Frame */
+#define RDES_CE		(1 << 16)	/* CRC error */
+#define RDES_FT		(1 << 15)	/* Frame Type */
+#define RDES_FLEN	(0x7ff)		/* Frame Length */
+
+#define RDES_RER	(1 << 25)	/* Receive End of Ring */
+#define RDES_RBS	(0x7ff)		/* Receive Buffer Size */
+
+/* Transmit descriptor flags */
+
+#define TDES_OWN	(1 << 31)	/* Ownership */
+
+#define TDES_IC		(1 << 31)	/* Interrupt on Completion */
+#define TDES_FS		(1 << 30)	/* First Segment */
+#define TDES_LS		(1 << 29)	/* Last Segment */
+#define TDES_IPCKG	(1 << 28)	/* IP Checksum generate */
+#define TDES_TCPCKG	(1 << 27)	/* TCP Checksum generate */
+#define TDES_UDPCKG	(1 << 26)	/* UDP Checksum generate */
+#define TDES_TER	(1 << 25)	/* Transmit End of Ring */
+#define TDES_TBS	(0x7ff)		/* Transmit Buffer Size */
+
+/*
+ * Network controller register offsets
+ */
+#define KS8695_DTXC		(0x00)		/* DMA Transmit Control */
+#define KS8695_DRXC		(0x04)		/* DMA Receive Control */
+#define KS8695_DTSC		(0x08)		/* DMA Transmit Start Command */
+#define KS8695_DRSC		(0x0c)		/* DMA Receive Start Command */
+#define KS8695_TDLB		(0x10)		/* Transmit Descriptor List
+						 * Base Address
+						 */
+#define KS8695_RDLB		(0x14)		/* Receive Descriptor List
+						 * Base Address
+						 */
+#define KS8695_MAL		(0x18)		/* MAC Station Address Low */
+#define KS8695_MAH		(0x1c)		/* MAC Station Address High */
+#define KS8695_AAL_(n)		(0x80 + ((n)*8))	/* MAC Additional
+							 * Station Address
+							 * (0..15) Low
+							 */
+#define KS8695_AAH_(n)		(0x84 + ((n)*8))	/* MAC Additional
+							 * Station Address
+							 * (0..15) High
+							 */
+
+
+/* DMA Transmit Control Register */
+#define DTXC_TRST		(1    << 31)	/* Soft Reset */
+#define DTXC_TBS		(0x3f << 24)	/* Transmit Burst Size */
+#define DTXC_TUCG		(1    << 18)	/* Transmit UDP
+						 * Checksum Generate
+						 */
+#define DTXC_TTCG		(1    << 17)	/* Transmit TCP
+						 * Checksum Generate
+						 */
+#define DTXC_TICG		(1    << 16)	/* Transmit IP
+						 * Checksum Generate
+						 */
+#define DTXC_TFCE		(1    <<  9)	/* Transmit Flow
+						 * Control Enable
+						 */
+#define DTXC_TLB		(1    <<  8)	/* Loopback mode */
+#define DTXC_TEP		(1    <<  2)	/* Transmit Enable Padding */
+#define DTXC_TAC		(1    <<  1)	/* Transmit Add CRC */
+#define DTXC_TE			(1    <<  0)	/* TX Enable */
+
+/* DMA Receive Control Register */
+#define DRXC_RBS		(0x3f << 24)	/* Receive Burst Size */
+#define DRXC_RUCC		(1    << 18)	/* Receive UDP Checksum check */
+#define DRXC_RTCG		(1    << 17)	/* Receive TCP Checksum check */
+#define DRXC_RICG		(1    << 16)	/* Receive IP Checksum check */
+#define DRXC_RFCE		(1    <<  9)	/* Receive Flow Control
+						 * Enable
+						 */
+#define DRXC_RB			(1    <<  6)	/* Receive Broadcast */
+#define DRXC_RM			(1    <<  5)	/* Receive Multicast */
+#define DRXC_RU			(1    <<  4)	/* Receive Unicast */
+#define DRXC_RERR		(1    <<  3)	/* Receive Error Frame */
+#define DRXC_RA			(1    <<  2)	/* Receive All */
+#define DRXC_RE			(1    <<  0)	/* RX Enable */
+
+/* Additional Station Address High */
+#define AAH_E			(1    << 31)	/* Address Enabled */
+
+#endif /* KS8695NET_H */