Merge commit '87ddedd'

1 files changed, 1036 insertions, 0 deletions

diff --git a/drivers/net/tsi108_eth.c b/drivers/net/tsi108_eth.c
new file mode 100644
index 0000000000..524e9daa4c
--- /dev/null
+++ b/drivers/net/tsi108_eth.c
@@ -0,0 +1,1036 @@
+/***********************************************************************
+ *
+ * Copyright (c) 2005 Freescale Semiconductor, Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ * Description:
+ *   Ethernet interface for Tundra TSI108 bridge chip
+ *
+ ***********************************************************************/
+
+#include <config.h>
+
+#if defined(CONFIG_CMD_NET) && defined(CONFIG_NET_MULTI) \
+	&& defined(CONFIG_TSI108_ETH)
+
+#if !defined(CONFIG_TSI108_ETH_NUM_PORTS) || (CONFIG_TSI108_ETH_NUM_PORTS > 2)
+#error "CONFIG_TSI108_ETH_NUM_PORTS must be defined as 1 or 2"
+#endif
+
+#include <common.h>
+#include <malloc.h>
+#include <net.h>
+#include <asm/cache.h>
+
+#ifdef DEBUG
+#define TSI108_ETH_DEBUG 7
+#else
+#define TSI108_ETH_DEBUG 0
+#endif
+
+#if TSI108_ETH_DEBUG > 0
+#define debug_lev(lev, fmt, args...) \
+if (lev <= TSI108_ETH_DEBUG) \
+printf ("%s %d: " fmt, __FUNCTION__, __LINE__, ##args)
+#else
+#define debug_lev(lev, fmt, args...) do{}while(0)
+#endif
+
+#define RX_PRINT_ERRORS
+#define TX_PRINT_ERRORS
+
+#define ETH_BASE	(CFG_TSI108_CSR_BASE + 0x6000)
+
+#define ETH_PORT_OFFSET	0x400
+
+#define __REG32(base, offset) (*((volatile u32 *)((char *)(base) + (offset))))
+
+#define reg_MAC_CONFIG_1(base)		__REG32(base, 0x00000000)
+#define MAC_CONFIG_1_TX_ENABLE		(0x00000001)
+#define MAC_CONFIG_1_SYNC_TX_ENABLE	(0x00000002)
+#define MAC_CONFIG_1_RX_ENABLE		(0x00000004)
+#define MAC_CONFIG_1_SYNC_RX_ENABLE	(0x00000008)
+#define MAC_CONFIG_1_TX_FLOW_CONTROL	(0x00000010)
+#define MAC_CONFIG_1_RX_FLOW_CONTROL	(0x00000020)
+#define MAC_CONFIG_1_LOOP_BACK		(0x00000100)
+#define MAC_CONFIG_1_RESET_TX_FUNCTION	(0x00010000)
+#define MAC_CONFIG_1_RESET_RX_FUNCTION	(0x00020000)
+#define MAC_CONFIG_1_RESET_TX_MAC	(0x00040000)
+#define MAC_CONFIG_1_RESET_RX_MAC	(0x00080000)
+#define MAC_CONFIG_1_SIM_RESET		(0x40000000)
+#define MAC_CONFIG_1_SOFT_RESET		(0x80000000)
+
+#define reg_MAC_CONFIG_2(base)		__REG32(base, 0x00000004)
+#define MAC_CONFIG_2_FULL_DUPLEX	(0x00000001)
+#define MAC_CONFIG_2_CRC_ENABLE		(0x00000002)
+#define MAC_CONFIG_2_PAD_CRC		(0x00000004)
+#define MAC_CONFIG_2_LENGTH_CHECK	(0x00000010)
+#define MAC_CONFIG_2_HUGE_FRAME		(0x00000020)
+#define MAC_CONFIG_2_INTERFACE_MODE(val)	(((val) & 0x3) << 8)
+#define MAC_CONFIG_2_PREAMBLE_LENGTH(val)	(((val) & 0xf) << 12)
+#define INTERFACE_MODE_NIBBLE		1	/* 10/100 Mb/s MII) */
+#define INTERFACE_MODE_BYTE		2	/* 1000 Mb/s GMII/TBI */
+
+#define reg_MAXIMUM_FRAME_LENGTH(base)		__REG32(base, 0x00000010)
+
+#define reg_MII_MGMT_CONFIG(base)		__REG32(base, 0x00000020)
+#define MII_MGMT_CONFIG_MGMT_CLOCK_SELECT(val)	((val) & 0x7)
+#define MII_MGMT_CONFIG_NO_PREAMBLE		(0x00000010)
+#define MII_MGMT_CONFIG_SCAN_INCREMENT		(0x00000020)
+#define MII_MGMT_CONFIG_RESET_MGMT		(0x80000000)
+
+#define reg_MII_MGMT_COMMAND(base)		__REG32(base, 0x00000024)
+#define MII_MGMT_COMMAND_READ_CYCLE		(0x00000001)
+#define MII_MGMT_COMMAND_SCAN_CYCLE		(0x00000002)
+
+#define reg_MII_MGMT_ADDRESS(base)		__REG32(base, 0x00000028)
+#define reg_MII_MGMT_CONTROL(base)		__REG32(base, 0x0000002c)
+#define reg_MII_MGMT_STATUS(base)		__REG32(base, 0x00000030)
+
+#define reg_MII_MGMT_INDICATORS(base)		__REG32(base, 0x00000034)
+#define MII_MGMT_INDICATORS_BUSY		(0x00000001)
+#define MII_MGMT_INDICATORS_SCAN		(0x00000002)
+#define MII_MGMT_INDICATORS_NOT_VALID		(0x00000004)
+
+#define reg_INTERFACE_STATUS(base)		__REG32(base, 0x0000003c)
+#define INTERFACE_STATUS_LINK_FAIL		(0x00000008)
+#define INTERFACE_STATUS_EXCESS_DEFER		(0x00000200)
+
+#define reg_STATION_ADDRESS_1(base)		__REG32(base, 0x00000040)
+#define reg_STATION_ADDRESS_2(base)		__REG32(base, 0x00000044)
+
+#define reg_PORT_CONTROL(base)			__REG32(base, 0x00000200)
+#define PORT_CONTROL_PRI		(0x00000001)
+#define PORT_CONTROL_BPT		(0x00010000)
+#define PORT_CONTROL_SPD		(0x00040000)
+#define PORT_CONTROL_RBC		(0x00080000)
+#define PORT_CONTROL_PRB		(0x00200000)
+#define PORT_CONTROL_DIS		(0x00400000)
+#define PORT_CONTROL_TBI		(0x00800000)
+#define PORT_CONTROL_STE		(0x10000000)
+#define PORT_CONTROL_ZOR		(0x20000000)
+#define PORT_CONTROL_CLR		(0x40000000)
+#define PORT_CONTROL_SRT		(0x80000000)
+
+#define reg_TX_CONFIG(base)		__REG32(base, 0x00000220)
+#define TX_CONFIG_START_Q		(0x00000003)
+#define TX_CONFIG_EHP			(0x00400000)
+#define TX_CONFIG_CHP			(0x00800000)
+#define TX_CONFIG_RST			(0x80000000)
+
+#define reg_TX_CONTROL(base)		__REG32(base, 0x00000224)
+#define TX_CONTROL_GO			(0x00008000)
+#define TX_CONTROL_MP			(0x01000000)
+#define TX_CONTROL_EAI			(0x20000000)
+#define TX_CONTROL_ABT			(0x40000000)
+#define TX_CONTROL_EII			(0x80000000)
+
+#define reg_TX_STATUS(base)		__REG32(base, 0x00000228)
+#define TX_STATUS_QUEUE_USABLE		(0x0000000f)
+#define TX_STATUS_CURR_Q		(0x00000300)
+#define TX_STATUS_ACT			(0x00008000)
+#define TX_STATUS_QUEUE_IDLE		(0x000f0000)
+#define TX_STATUS_EOQ_PENDING		(0x0f000000)
+
+#define reg_TX_EXTENDED_STATUS(base)		__REG32(base, 0x0000022c)
+#define TX_EXTENDED_STATUS_END_OF_QUEUE_CONDITION		(0x0000000f)
+#define TX_EXTENDED_STATUS_END_OF_FRAME_CONDITION		(0x00000f00)
+#define TX_EXTENDED_STATUS_DESCRIPTOR_INTERRUPT_CONDITION	(0x000f0000)
+#define TX_EXTENDED_STATUS_ERROR_FLAG				(0x0f000000)
+
+#define reg_TX_THRESHOLDS(base)			__REG32(base, 0x00000230)
+
+#define reg_TX_DIAGNOSTIC_ADDR(base)           __REG32(base, 0x00000270)
+#define TX_DIAGNOSTIC_ADDR_INDEX		(0x0000007f)
+#define TX_DIAGNOSTIC_ADDR_DFR			(0x40000000)
+#define TX_DIAGNOSTIC_ADDR_AI			(0x80000000)
+
+#define reg_TX_DIAGNOSTIC_DATA(base)		__REG32(base, 0x00000274)
+
+#define reg_TX_ERROR_STATUS(base)		__REG32(base, 0x00000278)
+#define TX_ERROR_STATUS				(0x00000278)
+#define TX_ERROR_STATUS_QUEUE_0_ERROR_RESPONSE	(0x0000000f)
+#define TX_ERROR_STATUS_TEA_ON_QUEUE_0		(0x00000010)
+#define TX_ERROR_STATUS_RER_ON_QUEUE_0		(0x00000020)
+#define TX_ERROR_STATUS_TER_ON_QUEUE_0		(0x00000040)
+#define TX_ERROR_STATUS_DER_ON_QUEUE_0		(0x00000080)
+#define TX_ERROR_STATUS_QUEUE_1_ERROR_RESPONSE	(0x00000f00)
+#define TX_ERROR_STATUS_TEA_ON_QUEUE_1		(0x00001000)
+#define TX_ERROR_STATUS_RER_ON_QUEUE_1		(0x00002000)
+#define TX_ERROR_STATUS_TER_ON_QUEUE_1		(0x00004000)
+#define TX_ERROR_STATUS_DER_ON_QUEUE_1		(0x00008000)
+#define TX_ERROR_STATUS_QUEUE_2_ERROR_RESPONSE	(0x000f0000)
+#define TX_ERROR_STATUS_TEA_ON_QUEUE_2		(0x00100000)
+#define TX_ERROR_STATUS_RER_ON_QUEUE_2		(0x00200000)
+#define TX_ERROR_STATUS_TER_ON_QUEUE_2		(0x00400000)
+#define TX_ERROR_STATUS_DER_ON_QUEUE_2		(0x00800000)
+#define TX_ERROR_STATUS_QUEUE_3_ERROR_RESPONSE	(0x0f000000)
+#define TX_ERROR_STATUS_TEA_ON_QUEUE_3		(0x10000000)
+#define TX_ERROR_STATUS_RER_ON_QUEUE_3		(0x20000000)
+#define TX_ERROR_STATUS_TER_ON_QUEUE_3		(0x40000000)
+#define TX_ERROR_STATUS_DER_ON_QUEUE_3		(0x80000000)
+
+#define reg_TX_QUEUE_0_CONFIG(base)		__REG32(base, 0x00000280)
+#define TX_QUEUE_0_CONFIG_OCN_PORT		(0x0000003f)
+#define TX_QUEUE_0_CONFIG_BSWP			(0x00000400)
+#define TX_QUEUE_0_CONFIG_WSWP			(0x00000800)
+#define TX_QUEUE_0_CONFIG_AM			(0x00004000)
+#define TX_QUEUE_0_CONFIG_GVI			(0x00008000)
+#define TX_QUEUE_0_CONFIG_EEI			(0x00010000)
+#define TX_QUEUE_0_CONFIG_ELI			(0x00020000)
+#define TX_QUEUE_0_CONFIG_ENI			(0x00040000)
+#define TX_QUEUE_0_CONFIG_ESI			(0x00080000)
+#define TX_QUEUE_0_CONFIG_EDI			(0x00100000)
+
+#define reg_TX_QUEUE_0_BUF_CONFIG(base)		__REG32(base, 0x00000284)
+#define TX_QUEUE_0_BUF_CONFIG_OCN_PORT		(0x0000003f)
+#define TX_QUEUE_0_BUF_CONFIG_BURST		(0x00000300)
+#define TX_QUEUE_0_BUF_CONFIG_BSWP		(0x00000400)
+#define TX_QUEUE_0_BUF_CONFIG_WSWP		(0x00000800)
+
+#define OCN_PORT_HLP			0	/* HLP Interface */
+#define OCN_PORT_PCI_X			1	/* PCI-X Interface */
+#define OCN_PORT_PROCESSOR_MASTER	2	/* Processor Interface (master) */
+#define OCN_PORT_PROCESSOR_SLAVE	3	/* Processor Interface (slave) */
+#define OCN_PORT_MEMORY			4	/* Memory Controller */
+#define OCN_PORT_DMA			5	/* DMA Controller */
+#define OCN_PORT_ETHERNET		6	/* Ethernet Controller */
+#define OCN_PORT_PRINT			7	/* Print Engine Interface */
+
+#define reg_TX_QUEUE_0_PTR_LOW(base)		__REG32(base, 0x00000288)
+
+#define reg_TX_QUEUE_0_PTR_HIGH(base)		__REG32(base, 0x0000028c)
+#define TX_QUEUE_0_PTR_HIGH_VALID		(0x80000000)
+
+#define reg_RX_CONFIG(base)			__REG32(base, 0x00000320)
+#define RX_CONFIG_DEF_Q				(0x00000003)
+#define RX_CONFIG_EMF				(0x00000100)
+#define RX_CONFIG_EUF				(0x00000200)
+#define RX_CONFIG_BFE				(0x00000400)
+#define RX_CONFIG_MFE				(0x00000800)
+#define RX_CONFIG_UFE				(0x00001000)
+#define RX_CONFIG_SE				(0x00002000)
+#define RX_CONFIG_ABF				(0x00200000)
+#define RX_CONFIG_APE				(0x00400000)
+#define RX_CONFIG_CHP				(0x00800000)
+#define RX_CONFIG_RST				(0x80000000)
+
+#define reg_RX_CONTROL(base)			__REG32(base, 0x00000324)
+#define GE_E0_RX_CONTROL_QUEUE_ENABLES		(0x0000000f)
+#define GE_E0_RX_CONTROL_GO			(0x00008000)
+#define GE_E0_RX_CONTROL_EAI			(0x20000000)
+#define GE_E0_RX_CONTROL_ABT			(0x40000000)
+#define GE_E0_RX_CONTROL_EII			(0x80000000)
+
+#define reg_RX_EXTENDED_STATUS(base)		__REG32(base, 0x0000032c)
+#define RX_EXTENDED_STATUS			(0x0000032c)
+#define RX_EXTENDED_STATUS_EOQ			(0x0000000f)
+#define RX_EXTENDED_STATUS_EOQ_0		(0x00000001)
+#define RX_EXTENDED_STATUS_EOF			(0x00000f00)
+#define RX_EXTENDED_STATUS_DESCRIPTOR_INTERRUPT_CONDITION	(0x000f0000)
+#define RX_EXTENDED_STATUS_ERROR_FLAG				(0x0f000000)
+
+#define reg_RX_THRESHOLDS(base)			__REG32(base, 0x00000330)
+
+#define reg_RX_DIAGNOSTIC_ADDR(base)		__REG32(base, 0x00000370)
+#define RX_DIAGNOSTIC_ADDR_INDEX		(0x0000007f)
+#define RX_DIAGNOSTIC_ADDR_DFR			(0x40000000)
+#define RX_DIAGNOSTIC_ADDR_AI			(0x80000000)
+
+#define reg_RX_DIAGNOSTIC_DATA(base)		__REG32(base, 0x00000374)
+
+#define reg_RX_QUEUE_0_CONFIG(base)		__REG32(base, 0x00000380)
+#define RX_QUEUE_0_CONFIG_OCN_PORT		(0x0000003f)
+#define RX_QUEUE_0_CONFIG_BSWP			(0x00000400)
+#define RX_QUEUE_0_CONFIG_WSWP			(0x00000800)
+#define RX_QUEUE_0_CONFIG_AM			(0x00004000)
+#define RX_QUEUE_0_CONFIG_EEI			(0x00010000)
+#define RX_QUEUE_0_CONFIG_ELI			(0x00020000)
+#define RX_QUEUE_0_CONFIG_ENI			(0x00040000)
+#define RX_QUEUE_0_CONFIG_ESI			(0x00080000)
+#define RX_QUEUE_0_CONFIG_EDI			(0x00100000)
+
+#define reg_RX_QUEUE_0_BUF_CONFIG(base)		__REG32(base, 0x00000384)
+#define RX_QUEUE_0_BUF_CONFIG_OCN_PORT		(0x0000003f)
+#define RX_QUEUE_0_BUF_CONFIG_BURST		(0x00000300)
+#define RX_QUEUE_0_BUF_CONFIG_BSWP		(0x00000400)
+#define RX_QUEUE_0_BUF_CONFIG_WSWP		(0x00000800)
+
+#define reg_RX_QUEUE_0_PTR_LOW(base)		__REG32(base, 0x00000388)
+
+#define reg_RX_QUEUE_0_PTR_HIGH(base)		__REG32(base, 0x0000038c)
+#define RX_QUEUE_0_PTR_HIGH_VALID		(0x80000000)
+
+/*
+ *  PHY register definitions
+ */
+/* the first 15 PHY registers are standard. */
+#define PHY_CTRL_REG		0	/* Control Register */
+#define PHY_STATUS_REG		1	/* Status Regiser */
+#define PHY_ID1_REG		2	/* Phy Id Reg (word 1) */
+#define PHY_ID2_REG		3	/* Phy Id Reg (word 2) */
+#define PHY_AN_ADV_REG		4	/* Autoneg Advertisement */
+#define PHY_LP_ABILITY_REG	5	/* Link Partner Ability (Base Page) */
+#define PHY_AUTONEG_EXP_REG	6	/* Autoneg Expansion Reg */
+#define PHY_NEXT_PAGE_TX_REG	7	/* Next Page TX */
+#define PHY_LP_NEXT_PAGE_REG	8	/* Link Partner Next Page */
+#define PHY_1000T_CTRL_REG	9	/* 1000Base-T Control Reg */
+#define PHY_1000T_STATUS_REG	10	/* 1000Base-T Status Reg */
+#define PHY_EXT_STATUS_REG	11	/* Extended Status Reg */
+
+/*
+ * PHY Register bit masks.
+ */
+#define PHY_CTRL_RESET		(1 << 15)
+#define PHY_CTRL_LOOPBACK	(1 << 14)
+#define PHY_CTRL_SPEED0		(1 << 13)
+#define PHY_CTRL_AN_EN		(1 << 12)
+#define PHY_CTRL_PWR_DN		(1 << 11)
+#define PHY_CTRL_ISOLATE	(1 << 10)
+#define PHY_CTRL_RESTART_AN	(1 << 9)
+#define PHY_CTRL_FULL_DUPLEX	(1 << 8)
+#define PHY_CTRL_CT_EN		(1 << 7)
+#define PHY_CTRL_SPEED1		(1 << 6)
+
+#define PHY_STAT_100BASE_T4	(1 << 15)
+#define PHY_STAT_100BASE_X_FD	(1 << 14)
+#define PHY_STAT_100BASE_X_HD	(1 << 13)
+#define PHY_STAT_10BASE_T_FD	(1 << 12)
+#define PHY_STAT_10BASE_T_HD	(1 << 11)
+#define PHY_STAT_100BASE_T2_FD	(1 << 10)
+#define PHY_STAT_100BASE_T2_HD	(1 << 9)
+#define PHY_STAT_EXT_STAT	(1 << 8)
+#define PHY_STAT_RESERVED	(1 << 7)
+#define PHY_STAT_MFPS		(1 << 6)	/* Management Frames Preamble Suppression */
+#define PHY_STAT_AN_COMPLETE	(1 << 5)
+#define PHY_STAT_REM_FAULT	(1 << 4)
+#define PHY_STAT_AN_CAP		(1 << 3)
+#define PHY_STAT_LINK_UP	(1 << 2)
+#define PHY_STAT_JABBER		(1 << 1)
+#define PHY_STAT_EXT_CAP	(1 << 0)
+
+#define TBI_CONTROL_2					0x11
+#define TBI_CONTROL_2_ENABLE_COMMA_DETECT		0x0001
+#define TBI_CONTROL_2_ENABLE_WRAP			0x0002
+#define TBI_CONTROL_2_G_MII_MODE			0x0010
+#define TBI_CONTROL_2_RECEIVE_CLOCK_SELECT		0x0020
+#define TBI_CONTROL_2_AUTO_NEGOTIATION_SENSE		0x0100
+#define TBI_CONTROL_2_DISABLE_TRANSMIT_RUNNING_DISPARITY	0x1000
+#define TBI_CONTROL_2_DISABLE_RECEIVE_RUNNING_DISPARITY		0x2000
+#define TBI_CONTROL_2_SHORTCUT_LINK_TIMER			0x4000
+#define TBI_CONTROL_2_SOFT_RESET				0x8000
+
+/* marvel specific */
+#define MV1111_EXT_CTRL1_REG	16	/* PHY Specific Control Reg */
+#define MV1111_SPEC_STAT_REG	17	/* PHY Specific Status Reg */
+#define MV1111_EXT_CTRL2_REG	20	/* Extended PHY Specific Control Reg */
+
+/*
+ * MARVELL 88E1111 PHY register bit masks
+ */
+/* PHY Specific Status Register (MV1111_EXT_CTRL1_REG) */
+
+#define SPEC_STAT_SPEED_MASK	(3 << 14)
+#define SPEC_STAT_FULL_DUP	(1 << 13)
+#define SPEC_STAT_PAGE_RCVD	(1 << 12)
+#define SPEC_STAT_RESOLVED	(1 << 11)	/* Speed and Duplex Resolved */
+#define SPEC_STAT_LINK_UP	(1 << 10)
+#define SPEC_STAT_CABLE_LEN_MASK	(7 << 7)/* Cable Length (100/1000 modes only) */
+#define SPEC_STAT_MDIX		(1 << 6)
+#define SPEC_STAT_POLARITY	(1 << 1)
+#define SPEC_STAT_JABBER	(1 << 0)
+
+#define SPEED_1000		(2 << 14)
+#define SPEED_100		(1 << 14)
+#define SPEED_10		(0 << 14)
+
+#define TBI_ADDR	0x1E	/* Ten Bit Interface address */
+
+/* negotiated link parameters */
+#define LINK_SPEED_UNKNOWN	0
+#define LINK_SPEED_10		1
+#define LINK_SPEED_100		2
+#define LINK_SPEED_1000		3
+
+#define LINK_DUPLEX_UNKNOWN	0
+#define LINK_DUPLEX_HALF	1
+#define LINK_DUPLEX_FULL	2
+
+static unsigned int phy_address[] = { 8, 9 };
+
+#define vuint32 volatile u32
+
+/* TX/RX buffer descriptors. MUST be cache line aligned in memory. (32 byte)
+ * This structure is accessed by the ethernet DMA engine which means it
+ * MUST be in LITTLE ENDIAN format */
+struct dma_descriptor {
+	vuint32 start_addr0;	/* buffer address, least significant bytes. */
+	vuint32 start_addr1;	/* buffer address, most significant bytes. */
+	vuint32 next_descr_addr0;/* next descriptor address, least significant bytes.  Must be 64-bit aligned. */
+	vuint32 next_descr_addr1;/* next descriptor address, most significant bytes. */
+	vuint32 vlan_byte_count;/* VLAN tag(top 2 bytes) and byte countt (bottom 2 bytes). */
+	vuint32 config_status;	/* Configuration/Status. */
+	vuint32 reserved1;	/* reserved to make the descriptor cache line aligned. */
+	vuint32 reserved2;	/* reserved to make the descriptor cache line aligned. */
+};
+
+/* last next descriptor address flag */
+#define DMA_DESCR_LAST		(1 << 31)
+
+/* TX DMA descriptor config status bits */
+#define DMA_DESCR_TX_EOF	(1 <<  0)	/* end of frame */
+#define DMA_DESCR_TX_SOF	(1 <<  1)	/* start of frame */
+#define DMA_DESCR_TX_PFVLAN	(1 <<  2)
+#define DMA_DESCR_TX_HUGE	(1 <<  3)
+#define DMA_DESCR_TX_PAD	(1 <<  4)
+#define DMA_DESCR_TX_CRC	(1 <<  5)
+#define DMA_DESCR_TX_DESCR_INT	(1 << 14)
+#define DMA_DESCR_TX_RETRY_COUNT	0x000F0000
+#define DMA_DESCR_TX_ONE_COLLISION	(1 << 20)
+#define DMA_DESCR_TX_LATE_COLLISION	(1 << 24)
+#define DMA_DESCR_TX_UNDERRUN		(1 << 25)
+#define DMA_DESCR_TX_RETRY_LIMIT	(1 << 26)
+#define DMA_DESCR_TX_OK			(1 << 30)
+#define DMA_DESCR_TX_OWNER		(1 << 31)
+
+/* RX DMA descriptor status bits */
+#define DMA_DESCR_RX_EOF		(1 <<  0)
+#define DMA_DESCR_RX_SOF		(1 <<  1)
+#define DMA_DESCR_RX_VTF		(1 <<  2)
+#define DMA_DESCR_RX_FRAME_IS_TYPE	(1 <<  3)
+#define DMA_DESCR_RX_SHORT_FRAME	(1 <<  4)
+#define DMA_DESCR_RX_HASH_MATCH		(1 <<  7)
+#define DMA_DESCR_RX_BAD_FRAME		(1 <<  8)
+#define DMA_DESCR_RX_OVERRUN		(1 <<  9)
+#define DMA_DESCR_RX_MAX_FRAME_LEN	(1 << 11)
+#define DMA_DESCR_RX_CRC_ERROR		(1 << 12)
+#define DMA_DESCR_RX_DESCR_INT		(1 << 13)
+#define DMA_DESCR_RX_OWNER		(1 << 15)
+
+#define RX_BUFFER_SIZE	PKTSIZE
+#define NUM_RX_DESC	PKTBUFSRX
+
+static struct dma_descriptor tx_descriptor __attribute__ ((aligned(32)));
+
+static struct dma_descriptor rx_descr_array[NUM_RX_DESC]
+	__attribute__ ((aligned(32)));
+
+static struct dma_descriptor *rx_descr_current;
+
+static int tsi108_eth_probe (struct eth_device *dev, bd_t * bis);
+static int tsi108_eth_send (struct eth_device *dev,
+			   volatile void *packet, int length);
+static int tsi108_eth_recv (struct eth_device *dev);
+static void tsi108_eth_halt (struct eth_device *dev);
+static unsigned int read_phy (unsigned int base,
+			     unsigned int phy_addr, unsigned int phy_reg);
+static void write_phy (unsigned int base,
+		      unsigned int phy_addr,
+		      unsigned int phy_reg, unsigned int phy_data);
+
+#if TSI108_ETH_DEBUG > 100
+/*
+ * print phy debug infomation
+ */
+static void dump_phy_regs (unsigned int phy_addr)
+{
+	int i;
+
+	printf ("PHY %d registers\n", phy_addr);
+	for (i = 0; i <= 30; i++) {
+		printf ("%2d  0x%04x\n", i, read_phy (ETH_BASE, phy_addr, i));
+	}
+	printf ("\n");
+
+}
+#else
+#define dump_phy_regs(base) do{}while(0)
+#endif
+
+#if TSI108_ETH_DEBUG > 100
+/*
+ * print debug infomation
+ */
+static void tx_diag_regs (unsigned int base)
+{
+	int i;
+	unsigned long dummy;
+
+	printf ("TX diagnostics registers\n");
+	reg_TX_DIAGNOSTIC_ADDR(base) = 0x00 | TX_DIAGNOSTIC_ADDR_AI;
+	udelay (1000);
+	dummy = reg_TX_DIAGNOSTIC_DATA(base);
+	for (i = 0x00; i <= 0x05; i++) {
+		udelay (1000);
+		printf ("0x%02x  0x%08x\n", i, reg_TX_DIAGNOSTIC_DATA(base));
+	}
+	reg_TX_DIAGNOSTIC_ADDR(base) = 0x40 | TX_DIAGNOSTIC_ADDR_AI;
+	udelay (1000);
+	dummy = reg_TX_DIAGNOSTIC_DATA(base);
+	for (i = 0x40; i <= 0x47; i++) {
+		udelay (1000);
+		printf ("0x%02x  0x%08x\n", i, reg_TX_DIAGNOSTIC_DATA(base));
+	}
+	printf ("\n");
+
+}
+#else
+#define tx_diag_regs(base) do{}while(0)
+#endif
+
+#if TSI108_ETH_DEBUG > 100
+/*
+ * print debug infomation
+ */
+static void rx_diag_regs (unsigned int base)
+{
+	int i;
+	unsigned long dummy;
+
+	printf ("RX diagnostics registers\n");
+	reg_RX_DIAGNOSTIC_ADDR(base) = 0x00 | RX_DIAGNOSTIC_ADDR_AI;
+	udelay (1000);
+	dummy = reg_RX_DIAGNOSTIC_DATA(base);
+	for (i = 0x00; i <= 0x05; i++) {
+		udelay (1000);
+		printf ("0x%02x  0x%08x\n", i, reg_RX_DIAGNOSTIC_DATA(base));
+	}
+	reg_RX_DIAGNOSTIC_ADDR(base) = 0x40 | RX_DIAGNOSTIC_ADDR_AI;
+	udelay (1000);
+	dummy = reg_RX_DIAGNOSTIC_DATA(base);
+	for (i = 0x08; i <= 0x0a; i++) {
+		udelay (1000);
+		printf ("0x%02x  0x%08x\n", i, reg_RX_DIAGNOSTIC_DATA(base));
+	}
+	printf ("\n");
+
+}
+#else
+#define rx_diag_regs(base) do{}while(0)
+#endif
+
+#if TSI108_ETH_DEBUG > 100
+/*
+ * print debug infomation
+ */
+static void debug_mii_regs (unsigned int base)
+{
+	printf ("MII_MGMT_CONFIG     0x%08x\n", reg_MII_MGMT_CONFIG(base));
+	printf ("MII_MGMT_COMMAND    0x%08x\n", reg_MII_MGMT_COMMAND(base));
+	printf ("MII_MGMT_ADDRESS    0x%08x\n", reg_MII_MGMT_ADDRESS(base));
+	printf ("MII_MGMT_CONTROL    0x%08x\n", reg_MII_MGMT_CONTROL(base));
+	printf ("MII_MGMT_STATUS     0x%08x\n", reg_MII_MGMT_STATUS(base));
+	printf ("MII_MGMT_INDICATORS 0x%08x\n", reg_MII_MGMT_INDICATORS(base));
+	printf ("\n");
+
+}
+#else
+#define debug_mii_regs(base) do{}while(0)
+#endif
+
+/*
+ * Wait until the phy bus is non-busy
+ */
+static void phy_wait (unsigned int base, unsigned int condition)
+{
+	int timeout;
+
+	timeout = 0;
+	while (reg_MII_MGMT_INDICATORS(base) & condition) {
+		udelay (10);
+		if (++timeout > 10000) {
+			printf ("ERROR: timeout waiting for phy bus (%d)\n",
+			       condition);
+			break;
+		}
+	}
+}
+
+/*
+ * read phy register
+ */
+static unsigned int read_phy (unsigned int base,
+			     unsigned int phy_addr, unsigned int phy_reg)
+{
+	unsigned int value;
+
+	phy_wait (base, MII_MGMT_INDICATORS_BUSY);
+
+	reg_MII_MGMT_ADDRESS(base) = (phy_addr << 8) | phy_reg;
+
+	/* Ensure that the Read Cycle bit is cleared prior to next read cycle */
+	reg_MII_MGMT_COMMAND(base) = 0;
+
+	/* start the read */
+	reg_MII_MGMT_COMMAND(base) = MII_MGMT_COMMAND_READ_CYCLE;
+
+	/* wait for the read to complete */
+	phy_wait (base,
+		 MII_MGMT_INDICATORS_NOT_VALID | MII_MGMT_INDICATORS_BUSY);
+
+	value = reg_MII_MGMT_STATUS(base);
+
+	reg_MII_MGMT_COMMAND(base) = 0;
+
+	return value;
+}
+
+/*
+ * write phy register
+ */
+static void write_phy (unsigned int base,
+		      unsigned int phy_addr,
+		      unsigned int phy_reg, unsigned int phy_data)
+{
+	phy_wait (base, MII_MGMT_INDICATORS_BUSY);
+
+	reg_MII_MGMT_ADDRESS(base) = (phy_addr << 8) | phy_reg;
+
+	/* Ensure that the Read Cycle bit is cleared prior to next cycle */
+	reg_MII_MGMT_COMMAND(base) = 0;
+
+	/* start the write */
+	reg_MII_MGMT_CONTROL(base) = phy_data;
+}
+
+/*
+ * configure the marvell 88e1111 phy
+ */
+static int marvell_88e_phy_config (struct eth_device *dev, int *speed,
+				  int *duplex)
+{
+	unsigned long base;
+	unsigned long phy_addr;
+	unsigned int phy_status;
+	unsigned int phy_spec_status;
+	int timeout;
+	int phy_speed;
+	int phy_duplex;
+	unsigned int value;
+
+	phy_speed = LINK_SPEED_UNKNOWN;
+	phy_duplex = LINK_DUPLEX_UNKNOWN;
+
+	base = dev->iobase;
+	phy_addr = (unsigned long)dev->priv;
+
+	/* Take the PHY out of reset. */
+	write_phy (ETH_BASE, phy_addr, PHY_CTRL_REG, PHY_CTRL_RESET);
+
+	/* Wait for the reset process to complete. */
+	udelay (10);
+	timeout = 0;
+	while ((phy_status =
+		read_phy (ETH_BASE, phy_addr, PHY_CTRL_REG)) & PHY_CTRL_RESET) {
+		udelay (10);
+		if (++timeout > 10000) {
+			printf ("ERROR: timeout waiting for phy reset\n");
+			break;
+		}
+	}
+
+	/* TBI Configuration. */
+	write_phy (base, TBI_ADDR, TBI_CONTROL_2, TBI_CONTROL_2_G_MII_MODE |
+		  TBI_CONTROL_2_RECEIVE_CLOCK_SELECT);
+	/* Wait for the link to be established. */
+	timeout = 0;
+	do {
+		udelay (20000);
+		phy_status = read_phy (ETH_BASE, phy_addr, PHY_STATUS_REG);
+		if (++timeout > 100) {
+			debug_lev(1, "ERROR: unable to establish link!!!\n");
+			break;
+		}
+	} while ((phy_status & PHY_STAT_LINK_UP) == 0);
+
+	if ((phy_status & PHY_STAT_LINK_UP) == 0)
+		return 0;
+
+	value = 0;
+	phy_spec_status = read_phy (ETH_BASE, phy_addr, MV1111_SPEC_STAT_REG);
+	if (phy_spec_status & SPEC_STAT_RESOLVED) {
+		switch (phy_spec_status & SPEC_STAT_SPEED_MASK) {
+		case SPEED_1000:
+			phy_speed = LINK_SPEED_1000;
+			value |= PHY_CTRL_SPEED1;
+			break;
+		case SPEED_100:
+			phy_speed = LINK_SPEED_100;
+			value |= PHY_CTRL_SPEED0;
+			break;
+		case SPEED_10:
+			phy_speed = LINK_SPEED_10;
+			break;
+		}
+		if (phy_spec_status & SPEC_STAT_FULL_DUP) {
+			phy_duplex = LINK_DUPLEX_FULL;
+			value |= PHY_CTRL_FULL_DUPLEX;
+		} else
+			phy_duplex = LINK_DUPLEX_HALF;
+	}
+	/* set TBI speed */
+	write_phy (base, TBI_ADDR, PHY_CTRL_REG, value);
+	write_phy (base, TBI_ADDR, PHY_AN_ADV_REG, 0x0060);
+
+#if TSI108_ETH_DEBUG > 0
+	printf ("%s link is up", dev->name);
+	phy_spec_status = read_phy (ETH_BASE, phy_addr, MV1111_SPEC_STAT_REG);
+	if (phy_spec_status & SPEC_STAT_RESOLVED) {
+		switch (phy_speed) {
+		case LINK_SPEED_1000:
+			printf (", 1000 Mbps");
+			break;
+		case LINK_SPEED_100:
+			printf (", 100 Mbps");
+			break;
+		case LINK_SPEED_10:
+			printf (", 10 Mbps");
+			break;
+		}
+		if (phy_duplex == LINK_DUPLEX_FULL)
+			printf (", Full duplex");
+		else
+			printf (", Half duplex");
+	}
+	printf ("\n");
+#endif
+
+	dump_phy_regs (TBI_ADDR);
+	if (speed)
+		*speed = phy_speed;
+	if (duplex)
+		*duplex = phy_duplex;
+
+	return 1;
+}
+
+/*
+ * External interface
+ *
+ * register the tsi108 ethernet controllers with the multi-ethernet system
+ */
+int tsi108_eth_initialize (bd_t * bis)
+{
+	struct eth_device *dev;
+	int index;
+
+	for (index = 0; index < CONFIG_TSI108_ETH_NUM_PORTS; index++) {
+		dev = (struct eth_device *)malloc(sizeof(struct eth_device));
+
+		sprintf (dev->name, "TSI108_eth%d", index);
+
+		dev->iobase = ETH_BASE + (index * ETH_PORT_OFFSET);
+		dev->priv = (void *)(phy_address[index]);
+		dev->init = tsi108_eth_probe;
+		dev->halt = tsi108_eth_halt;
+		dev->send = tsi108_eth_send;
+		dev->recv = tsi108_eth_recv;
+
+		eth_register(dev);
+	}
+	return index;
+}
+
+/*
+ * probe for and initialize a single ethernet interface
+ */
+static int tsi108_eth_probe (struct eth_device *dev, bd_t * bis)
+{
+	unsigned long base;
+	unsigned long value;
+	int index;
+	struct dma_descriptor *tx_descr;
+	struct dma_descriptor *rx_descr;
+	int speed;
+	int duplex;
+
+	base = dev->iobase;
+
+	reg_PORT_CONTROL(base) = PORT_CONTROL_STE | PORT_CONTROL_BPT;
+
+	/* Bring DMA/FIFO out of reset. */
+	reg_TX_CONFIG(base) = 0x00000000;
+	reg_RX_CONFIG(base) = 0x00000000;
+
+	reg_TX_THRESHOLDS(base) = (192 << 16) | 192;
+	reg_RX_THRESHOLDS(base) = (192 << 16) | 112;
+
+	/* Bring MAC out of reset. */
+	reg_MAC_CONFIG_1(base) = 0x00000000;
+
+	/* DMA MAC configuration. */
+	reg_MAC_CONFIG_1(base) =
+	    MAC_CONFIG_1_RX_ENABLE | MAC_CONFIG_1_TX_ENABLE;
+
+	reg_MII_MGMT_CONFIG(base) = MII_MGMT_CONFIG_NO_PREAMBLE;
+	reg_MAXIMUM_FRAME_LENGTH(base) = RX_BUFFER_SIZE;
+
+	/* Note: Early tsi108 manual did not have correct byte order
+	 * for the station address.*/
+	reg_STATION_ADDRESS_1(base) = (dev->enetaddr[5] << 24) |
+	    (dev->enetaddr[4] << 16) |
+	    (dev->enetaddr[3] << 8) | (dev->enetaddr[2] << 0);
+
+	reg_STATION_ADDRESS_2(base) = (dev->enetaddr[1] << 24) |
+	    (dev->enetaddr[0] << 16);
+
+	if (marvell_88e_phy_config(dev, &speed, &duplex) == 0)
+		return 0;
+
+	value =
+	    MAC_CONFIG_2_PREAMBLE_LENGTH(7) | MAC_CONFIG_2_PAD_CRC |
+	    MAC_CONFIG_2_CRC_ENABLE;
+	if (speed == LINK_SPEED_1000)
+		value |= MAC_CONFIG_2_INTERFACE_MODE(INTERFACE_MODE_BYTE);
+	else {
+		value |= MAC_CONFIG_2_INTERFACE_MODE(INTERFACE_MODE_NIBBLE);
+		reg_PORT_CONTROL(base) |= PORT_CONTROL_SPD;
+	}
+	if (duplex == LINK_DUPLEX_FULL) {
+		value |= MAC_CONFIG_2_FULL_DUPLEX;
+		reg_PORT_CONTROL(base) &= ~PORT_CONTROL_BPT;
+	} else
+		reg_PORT_CONTROL(base) |= PORT_CONTROL_BPT;
+	reg_MAC_CONFIG_2(base) = value;
+
+	reg_RX_CONFIG(base) = RX_CONFIG_SE;
+	reg_RX_QUEUE_0_CONFIG(base) = OCN_PORT_MEMORY;
+	reg_RX_QUEUE_0_BUF_CONFIG(base) = OCN_PORT_MEMORY;
+
+	/* initialize the RX DMA descriptors */
+	rx_descr = &rx_descr_array[0];
+	rx_descr_current = rx_descr;
+	for (index = 0; index < NUM_RX_DESC; index++) {
+		/* make sure the receive buffers are not in cache */
+		invalidate_dcache_range((unsigned long)NetRxPackets[index],
+					(unsigned long)NetRxPackets[index] +
+					RX_BUFFER_SIZE);
+		rx_descr->start_addr0 =
+		    cpu_to_le32((vuint32) NetRxPackets[index]);
+		rx_descr->start_addr1 = 0;
+		rx_descr->next_descr_addr0 =
+		    cpu_to_le32((vuint32) (rx_descr + 1));
+		rx_descr->next_descr_addr1 = 0;
+		rx_descr->vlan_byte_count = 0;
+		rx_descr->config_status = cpu_to_le32((RX_BUFFER_SIZE << 16) |
+						      DMA_DESCR_RX_OWNER);
+		rx_descr++;
+	}
+	rx_descr--;
+	rx_descr->next_descr_addr0 = 0;
+	rx_descr->next_descr_addr1 = cpu_to_le32(DMA_DESCR_LAST);
+	/* Push the descriptors to RAM so the ethernet DMA can see them */
+	invalidate_dcache_range((unsigned long)rx_descr_array,
+				(unsigned long)rx_descr_array +
+				sizeof(rx_descr_array));
+
+	/* enable RX queue */
+	reg_RX_CONTROL(base) = TX_CONTROL_GO | 0x01;
+	reg_RX_QUEUE_0_PTR_LOW(base) = (u32) rx_descr_current;
+	/* enable receive DMA */
+	reg_RX_QUEUE_0_PTR_HIGH(base) = RX_QUEUE_0_PTR_HIGH_VALID;
+
+	reg_TX_QUEUE_0_CONFIG(base) = OCN_PORT_MEMORY;
+	reg_TX_QUEUE_0_BUF_CONFIG(base) = OCN_PORT_MEMORY;
+
+	/* initialize the TX DMA descriptor */
+	tx_descr = &tx_descriptor;
+
+	tx_descr->start_addr0 = 0;
+	tx_descr->start_addr1 = 0;
+	tx_descr->next_descr_addr0 = 0;
+	tx_descr->next_descr_addr1 = cpu_to_le32(DMA_DESCR_LAST);
+	tx_descr->vlan_byte_count = 0;
+	tx_descr->config_status = cpu_to_le32(DMA_DESCR_TX_OK |
+					      DMA_DESCR_TX_SOF |
+					      DMA_DESCR_TX_EOF);
+	/* enable TX queue */
+	reg_TX_CONTROL(base) = TX_CONTROL_GO | 0x01;
+
+	return 1;
+}
+
+/*
+ * send a packet
+ */
+static int tsi108_eth_send (struct eth_device *dev,
+			   volatile void *packet, int length)
+{
+	unsigned long base;
+	int timeout;
+	struct dma_descriptor *tx_descr;
+	unsigned long status;
+
+	base = dev->iobase;
+	tx_descr = &tx_descriptor;
+
+	/* Wait until the last packet has been transmitted. */
+	timeout = 0;
+	do {
+		/* make sure we see the changes made by the DMA engine */
+		invalidate_dcache_range((unsigned long)tx_descr,
+					(unsigned long)tx_descr +
+					sizeof(struct dma_descriptor));
+
+		if (timeout != 0)
+			udelay (15);
+		if (++timeout > 10000) {
+			tx_diag_regs(base);
+			debug_lev(1,
+				  "ERROR: timeout waiting for last transmit packet to be sent\n");
+			return 0;
+		}
+	} while (tx_descr->config_status & cpu_to_le32(DMA_DESCR_TX_OWNER));
+
+	status = le32_to_cpu(tx_descr->config_status);
+	if ((status & DMA_DESCR_TX_OK) == 0) {
+#ifdef TX_PRINT_ERRORS
+		printf ("TX packet error: 0x%08x\n    %s%s%s%s\n", status,
+		       status & DMA_DESCR_TX_OK ? "tx error, " : "",
+		       status & DMA_DESCR_TX_RETRY_LIMIT ?
+		       "retry limit reached, " : "",
+		       status & DMA_DESCR_TX_UNDERRUN ? "underrun, " : "",
+		       status & DMA_DESCR_TX_LATE_COLLISION ? "late collision, "
+		       : "");
+#endif
+	}
+
+	debug_lev (9, "sending packet %d\n", length);
+	tx_descr->start_addr0 = cpu_to_le32((vuint32) packet);
+	tx_descr->start_addr1 = 0;
+	tx_descr->next_descr_addr0 = 0;
+	tx_descr->next_descr_addr1 = cpu_to_le32(DMA_DESCR_LAST);
+	tx_descr->vlan_byte_count = cpu_to_le32(length);
+	tx_descr->config_status = cpu_to_le32(DMA_DESCR_TX_OWNER |
+					      DMA_DESCR_TX_CRC |
+					      DMA_DESCR_TX_PAD |
+					      DMA_DESCR_TX_SOF |
+					      DMA_DESCR_TX_EOF);
+
+	invalidate_dcache_range((unsigned long)tx_descr,
+				(unsigned long)tx_descr +
+				sizeof(struct dma_descriptor));
+
+	invalidate_dcache_range((unsigned long)packet,
+				(unsigned long)packet + length);
+
+	reg_TX_QUEUE_0_PTR_LOW(base) = (u32) tx_descr;
+	reg_TX_QUEUE_0_PTR_HIGH(base) = TX_QUEUE_0_PTR_HIGH_VALID;
+
+	return length;
+}
+
+/*
+ * Check for received packets and send them up the protocal stack
+ */
+static int tsi108_eth_recv (struct eth_device *dev)
+{
+	struct dma_descriptor *rx_descr;
+	unsigned long base;
+	int length = 0;
+	unsigned long status;
+	volatile uchar *buffer;
+
+	base = dev->iobase;
+
+	/* make sure we see the changes made by the DMA engine */
+	invalidate_dcache_range ((unsigned long)rx_descr_array,
+				(unsigned long)rx_descr_array +
+				sizeof(rx_descr_array));
+
+	/* process all of the received packets */
+	rx_descr = rx_descr_current;
+	while ((rx_descr->config_status & cpu_to_le32(DMA_DESCR_RX_OWNER)) == 0) {
+		/* check for error */
+		status = le32_to_cpu(rx_descr->config_status);
+		if (status & DMA_DESCR_RX_BAD_FRAME) {
+#ifdef RX_PRINT_ERRORS
+			printf ("RX packet error: 0x%08x\n    %s%s%s%s%s%s\n",
+			       status,
+			       status & DMA_DESCR_RX_FRAME_IS_TYPE ? "too big, "
+			       : "",
+			       status & DMA_DESCR_RX_SHORT_FRAME ? "too short, "
+			       : "",
+			       status & DMA_DESCR_RX_BAD_FRAME ? "bad frame, " :
+			       "",
+			       status & DMA_DESCR_RX_OVERRUN ? "overrun, " : "",
+			       status & DMA_DESCR_RX_MAX_FRAME_LEN ?
+			       "max length, " : "",
+			       status & DMA_DESCR_RX_CRC_ERROR ? "CRC error, " :
+			       "");
+#endif
+		} else {
+			length =
+			    le32_to_cpu(rx_descr->vlan_byte_count) & 0xFFFF;
+
+			/*** process packet ***/
+			buffer =
+			    (volatile uchar
+			     *)(le32_to_cpu (rx_descr->start_addr0));
+			NetReceive (buffer, length);
+
+			invalidate_dcache_range ((unsigned long)buffer,
+						(unsigned long)buffer +
+						RX_BUFFER_SIZE);
+		}
+		/* Give this buffer back to the DMA engine */
+		rx_descr->vlan_byte_count = 0;
+		rx_descr->config_status = cpu_to_le32 ((RX_BUFFER_SIZE << 16) |
+						      DMA_DESCR_RX_OWNER);
+		/* move descriptor pointer forward */
+		rx_descr =
+		    (struct dma_descriptor
+		     *)(le32_to_cpu (rx_descr->next_descr_addr0));
+		if (rx_descr == 0)
+			rx_descr = &rx_descr_array[0];
+	}
+	/* remember where we are for next time */
+	rx_descr_current = rx_descr;
+
+	/* If the DMA engine has reached the end of the queue
+	 * start over at the begining */
+	if (reg_RX_EXTENDED_STATUS(base) & RX_EXTENDED_STATUS_EOQ_0) {
+
+		reg_RX_EXTENDED_STATUS(base) = RX_EXTENDED_STATUS_EOQ_0;
+		reg_RX_QUEUE_0_PTR_LOW(base) = (u32) & rx_descr_array[0];
+		reg_RX_QUEUE_0_PTR_HIGH(base) = RX_QUEUE_0_PTR_HIGH_VALID;
+	}
+
+	return length;
+}
+
+/*
+ * disable an ethernet interface
+ */
+static void tsi108_eth_halt (struct eth_device *dev)
+{
+	unsigned long base;
+
+	base = dev->iobase;
+
+	/* Put DMA/FIFO into reset state. */
+	reg_TX_CONFIG(base) = TX_CONFIG_RST;
+	reg_RX_CONFIG(base) = RX_CONFIG_RST;
+
+	/* Put MAC into reset state. */
+	reg_MAC_CONFIG_1(base) = MAC_CONFIG_1_SOFT_RESET;
+}
+
+#endif