Tundra tsi108 on chip Ethernet controller support.

The following is a brief description of the Ethernet controller:
The Tsi108/9 Ethernet Controller connects Switch Fabric to two independent
Gigabit Ethernet ports,E0 and E1.  It uses a single Management interface
to manage the two physical connection devices (PHYs).  Each Ethernet port
has its own statistics monitor that tracks and reports key interface
statistics.  Each port supports a 256-entry hash table for address
filtering.  In addition, each port is bridged to the Switch Fabric
through a 2-Kbyte transmit FIFO and a 4-Kbyte Receive FIFO.

Each Ethernet port also has a pair of internal Ethernet DMA channels to
support the transmit and receive data flows.  The Ethernet DMA channels
use descriptors set up in memory, the memory map of the device, and
access via the Switch Fabric.  The Ethernet Controller?s DMA arbiter
handles arbitration for the Switch Fabric.  The Controller also
has a register businterface for register accesses and status monitor
control.

The PMD (Physical Media Device) interface operates in MII, GMII, or TBI
modes.  The MII mode is used for connecting with 10 or 100 Mbit/s PMDs.
The GMII and TBI modes are used to connect with Gigabit PMDs.  Internal
data flows to and from the Ethernet Controller through the Switch Fabric.

Each Ethernet port uses its transmit and receive DMA channels to manage
data flows through buffer descriptors that are predefined by the
system (the descriptors can exist anywhere in the system memory map).
These descriptors are data structures that point to buffers filled
with data ready to transmit over Ethernet, or they point to empty
buffers ready to receive data from Ethernet.

Signed-off-by: Alexandre Bounine <alexandreb@tundra.com>
Signed-off-by: Roy Zang <tie-fei.zang@freescale.com>

1 files changed, 1043 insertions, 0 deletions

diff --git a/drivers/tsi108_eth.c b/drivers/tsi108_eth.c
new file mode 100644
index 00000000000..d95a047ce85
--- /dev/null
+++ b/drivers/tsi108_eth.c
@@ -0,0 +1,1043 @@
+/***********************************************************************
+ *
+ * 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 (CONFIG_COMMANDS & CFG_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