* Patch by Thomas Frieden, 13 Nov 2002:
Add code for AmigaOne board
(preliminary merge to U-Boot, still WIP)
* Patch by Jon Diekema, 12 Nov 2002:
- Adding URL for IEEE OUI lookup
- Making the autoboot #defines dependent on CONFIG_AUTOBOOT_KEYED
being defined.
- In the CONFIG_EXTRA_ENV_SETTINGS #define, the root-on-initrd and
root-on-nfs macros are designed to switch how the default boot
method gets defined.
diff --git a/board/MAI/AmigaOneG3SE/enet.c b/board/MAI/AmigaOneG3SE/enet.c
new file mode 100644
index 0000000..0aaa8bf
--- /dev/null
+++ b/board/MAI/AmigaOneG3SE/enet.c
@@ -0,0 +1,886 @@
+/*
+ * (C) Copyright 2002
+ * Adam Kowalczyk, ACK Software Controls Inc. akowalczyk@cogeco.ca
+ *
+ * Some portions taken from 3c59x.c Written 1996-1999 by Donald Becker.
+ *
+ * Outline of the program based on eepro100.c which is
+ *
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * 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
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <net.h>
+#include <asm/io.h>
+#include <pci.h>
+
+#include "articiaS.h"
+#include "memio.h"
+
+/* 3Com Ethernet PCI definitions*/
+
+// #define PCI_VENDOR_ID_3COM 0x10B7
+#define PCI_DEVICE_ID_3COM_3C905C 0x9200
+
+/* 3Com Commands, top 5 bits are command and bottom 11 bits are parameters */
+
+#define TotalReset (0<<11)
+#define SelectWindow (1<<11)
+#define StartCoax (2<<11)
+#define RxDisable (3<<11)
+#define RxEnable (4<<11)
+#define RxReset (5<<11)
+#define UpStall (6<<11)
+#define UpUnstall (6<<11)+1
+#define DownStall (6<<11)+2
+#define DownUnstall (6<<11)+3
+#define RxDiscard (8<<11)
+#define TxEnable (9<<11)
+#define TxDisable (10<<11)
+#define TxReset (11<<11)
+#define FakeIntr (12<<11)
+#define AckIntr (13<<11)
+#define SetIntrEnb (14<<11)
+#define SetStatusEnb (15<<11)
+#define SetRxFilter (16<<11)
+#define SetRxThreshold (17<<11)
+#define SetTxThreshold (18<<11)
+#define SetTxStart (19<<11)
+#define StartDMAUp (20<<11)
+#define StartDMADown (20<<11)+1
+#define StatsEnable (21<<11)
+#define StatsDisable (22<<11)
+#define StopCoax (23<<11)
+#define SetFilterBit (25<<11)
+
+/* The SetRxFilter command accepts the following classes */
+
+#define RxStation 1
+#define RxMulticast 2
+#define RxBroadcast 4
+#define RxProm 8
+
+/* 3Com status word defnitions */
+
+#define IntLatch 0x0001
+#define HostError 0x0002
+#define TxComplete 0x0004
+#define TxAvailable 0x0008
+#define RxComplete 0x0010
+#define RxEarly 0x0020
+#define IntReq 0x0040
+#define StatsFull 0x0080
+#define DMADone (1<<8)
+#define DownComplete (1<<9)
+#define UpComplete (1<<10)
+#define DMAInProgress (1<<11) /* DMA controller is still busy.*/
+#define CmdInProgress (1<<12) /* EL3_CMD is still busy.*/
+
+/* Polling Registers */
+
+#define DnPoll 0x2d
+#define UpPoll 0x3d
+
+/* Register window 0 offets */
+
+#define Wn0EepromCmd 10 /* Window 0: EEPROM command register. */
+#define Wn0EepromData 12 /* Window 0: EEPROM results register. */
+#define IntrStatus 0x0E /* Valid in all windows. */
+
+/* Register window 0 EEPROM bits */
+
+#define EEPROM_Read 0x80
+#define EEPROM_WRITE 0x40
+#define EEPROM_ERASE 0xC0
+#define EEPROM_EWENB 0x30 /* Enable erasing/writing for 10 msec. */
+#define EEPROM_EWDIS 0x00 /* Disable EWENB before 10 msec timeout. */
+
+/* EEPROM locations. */
+
+#define PhysAddr01 0
+#define PhysAddr23 1
+#define PhysAddr45 2
+#define ModelID 3
+#define EtherLink3ID 7
+#define IFXcvrIO 8
+#define IRQLine 9
+#define NodeAddr01 10
+#define NodeAddr23 11
+#define NodeAddr45 12
+#define DriverTune 13
+#define Checksum 15
+
+/* Register window 1 offsets, the window used in normal operation */
+
+#define TX_FIFO 0x10
+#define RX_FIFO 0x10
+#define RxErrors 0x14
+#define RxStatus 0x18
+#define Timer 0x1A
+#define TxStatus 0x1B
+#define TxFree 0x1C /* Remaining free bytes in Tx buffer. */
+
+/* Register Window 2 */
+
+#define Wn2_ResetOptions 12
+
+/* Register Window 3: MAC/config bits */
+
+#define Wn3_Config 0 /* Internal Configuration */
+#define Wn3_MAC_Ctrl 6
+#define Wn3_Options 8
+
+#define BFEXT(value, offset, bitcount) \
+ ((((unsigned long)(value)) >> (offset)) & ((1 << (bitcount)) - 1))
+
+#define BFINS(lhs, rhs, offset, bitcount) \
+ (((lhs) & ~((((1 << (bitcount)) - 1)) << (offset))) | \
+ (((rhs) & ((1 << (bitcount)) - 1)) << (offset)))
+
+#define RAM_SIZE(v) BFEXT(v, 0, 3)
+#define RAM_WIDTH(v) BFEXT(v, 3, 1)
+#define RAM_SPEED(v) BFEXT(v, 4, 2)
+#define ROM_SIZE(v) BFEXT(v, 6, 2)
+#define RAM_SPLIT(v) BFEXT(v, 16, 2)
+#define XCVR(v) BFEXT(v, 20, 4)
+#define AUTOSELECT(v) BFEXT(v, 24, 1)
+
+/* Register Window 4: Xcvr/media bits */
+
+#define Wn4_FIFODiag 4
+#define Wn4_NetDiag 6
+#define Wn4_PhysicalMgmt 8
+#define Wn4_Media 10
+
+#define Media_SQE 0x0008 /* Enable SQE error counting for AUI. */
+#define Media_10TP 0x00C0 /* Enable link beat and jabber for 10baseT. */
+#define Media_Lnk 0x0080 /* Enable just link beat for 100TX/100FX. */
+#define Media_LnkBeat 0x0800
+
+/* Register Window 7: Bus Master control */
+
+#define Wn7_MasterAddr 0
+#define Wn7_MasterLen 6
+#define Wn7_MasterStatus 12
+
+/* Boomerang bus master control registers. */
+
+#define PktStatus 0x20
+#define DownListPtr 0x24
+#define FragAddr 0x28
+#define FragLen 0x2c
+#define TxFreeThreshold 0x2f
+#define UpPktStatus 0x30
+#define UpListPtr 0x38
+
+/* The Rx and Tx descriptor lists. */
+
+#define LAST_FRAG 0x80000000 /* Last Addr/Len pair in descriptor. */
+#define DN_COMPLETE 0x00010000 /* This packet has been downloaded */
+
+struct rx_desc_3com {
+ u32 next; /* Last entry points to 0 */
+ u32 status; /* FSH -> Frame Start Header */
+ u32 addr; /* Up to 63 addr/len pairs possible */
+ u32 length; /* Set LAST_FRAG to indicate last pair */
+};
+
+/* Values for the Rx status entry. */
+
+#define RxDComplete 0x00008000
+#define RxDError 0x4000
+#define IPChksumErr (1<<25)
+#define TCPChksumErr (1<<26)
+#define UDPChksumErr (1<<27)
+#define IPChksumValid (1<<29)
+#define TCPChksumValid (1<<30)
+#define UDPChksumValid (1<<31)
+
+struct tx_desc_3com {
+ u32 next; /* Last entry points to 0 */
+ u32 status; /* bits 0:12 length, others see below */
+ u32 addr;
+ u32 length;
+};
+
+/* Values for the Tx status entry. */
+
+#define CRCDisable 0x2000
+#define TxDComplete 0x8000
+#define AddIPChksum 0x02000000
+#define AddTCPChksum 0x04000000
+#define AddUDPChksum 0x08000000
+#define TxIntrUploaded 0x80000000 /* IRQ when in FIFO, but maybe not sent. */
+
+/* XCVR Types */
+
+#define XCVR_10baseT 0
+#define XCVR_AUI 1
+#define XCVR_10baseTOnly 2
+#define XCVR_10base2 3
+#define XCVR_100baseTx 4
+#define XCVR_100baseFx 5
+#define XCVR_MII 6
+#define XCVR_NWAY 8
+#define XCVR_ExtMII 9
+#define XCVR_Default 10 /* I don't think this is correct -> should have been 0x10 if Auto Negotiate */
+
+struct descriptor { /* A generic descriptor. */
+ u32 next; /* Last entry points to 0 */
+ u32 status; /* FSH -> Frame Start Header */
+ u32 addr; /* Up to 63 addr/len pairs possible */
+ u32 length; /* Set LAST_FRAG to indicate last pair */
+};
+
+/* Misc. definitions */
+
+#define NUM_RX_DESC PKTBUFSRX * 10
+#define NUM_TX_DESC 1 /* Number of TX descriptors */
+
+#define TOUT_LOOP 1000000
+
+#define ETH_ALEN 6
+
+#define EL3WINDOW(dev, win_num) ETH_OUTW(dev, SelectWindow + (win_num), EL3_CMD)
+#define EL3_CMD 0x0e
+#define EL3_STATUS 0x0e
+
+
+#undef ETH_DEBUG
+
+#ifdef ETH_DEBUG
+#define PRINTF(fmt,args...) printf (fmt ,##args)
+#else
+#define PRINTF(fmt,args...)
+#endif
+
+
+static struct rx_desc_3com *rx_ring; /* RX descriptor ring */
+static struct tx_desc_3com *tx_ring; /* TX descriptor ring */
+static u8 rx_buffer[NUM_RX_DESC][PKTSIZE_ALIGN]; /* storage for the incoming messages */
+static int rx_next = 0; /* RX descriptor ring pointer */
+static int tx_next = 0; /* TX descriptor ring pointer */
+static int tx_threshold;
+
+static void init_rx_ring(struct eth_device* dev);
+static void purge_tx_ring(struct eth_device* dev);
+
+static void read_hw_addr(struct eth_device* dev, bd_t * bis);
+
+static int eth_3com_init(struct eth_device* dev, bd_t *bis);
+static int eth_3com_send(struct eth_device* dev, volatile void *packet, int length);
+static int eth_3com_recv(struct eth_device* dev);
+static void eth_3com_halt(struct eth_device* dev);
+
+#define io_to_phys(a) pci_io_to_phys((pci_dev_t)dev->priv, a)
+#define phys_to_io(a) pci_phys_to_io((pci_dev_t)dev->priv, a)
+#define mem_to_phys(a) pci_mem_to_phys((pci_dev_t)dev->priv, a)
+#define phys_to_mem(a) pci_phys_to_mem((pci_dev_t)dev->priv, a)
+
+static inline int ETH_INL(struct eth_device* dev, u_long addr)
+{
+ __asm volatile ("eieio");
+ return le32_to_cpu(*(volatile u32 *)io_to_phys(addr + dev->iobase));
+}
+
+static inline int ETH_INW(struct eth_device* dev, u_long addr)
+{
+ __asm volatile ("eieio");
+ return le16_to_cpu(*(volatile u16 *)io_to_phys(addr + dev->iobase));
+}
+
+static inline int ETH_INB(struct eth_device* dev, u_long addr)
+{
+ __asm volatile ("eieio");
+ return *(volatile u8 *)io_to_phys(addr + dev->iobase);
+}
+
+static inline void ETH_OUTB(struct eth_device* dev, int command, u_long addr)
+{
+ *(volatile u8 *)io_to_phys(addr + dev->iobase) = command;
+ __asm volatile ("eieio");
+}
+
+static inline void ETH_OUTW(struct eth_device* dev, int command, u_long addr)
+{
+ *(volatile u16 *)io_to_phys(addr + dev->iobase) = cpu_to_le16(command);
+ __asm volatile ("eieio");
+}
+
+static inline void ETH_OUTL(struct eth_device* dev, int command, u_long addr)
+{
+ *(volatile u32 *)io_to_phys(addr + dev->iobase) = cpu_to_le32(command);
+ __asm volatile ("eieio");
+}
+
+static inline int ETH_STATUS(struct eth_device* dev)
+{
+ __asm volatile ("eieio");
+ return le16_to_cpu(*(volatile u16 *)io_to_phys(EL3_STATUS + dev->iobase));
+}
+
+static inline void ETH_CMD(struct eth_device* dev, int command)
+{
+ *(volatile u16 *)io_to_phys(EL3_CMD + dev->iobase) = cpu_to_le16(command);
+ __asm volatile ("eieio");
+}
+
+/* Command register is always in the same spot in all the register windows */
+/* This function issues a command and waits for it so complete by checking the CmdInProgress bit */
+
+static int issue_and_wait(struct eth_device* dev, int command)
+{
+
+ int i, status;
+
+ ETH_CMD(dev, command);
+ for (i = 0; i < 2000; i++) {
+ status = ETH_STATUS(dev);
+ //printf ("Issue: status 0x%4x.\n", status);
+ if (!(status & CmdInProgress))
+ return 1;
+ }
+
+ /* OK, that didn't work. Do it the slow way. One second */
+ for (i = 0; i < 100000; i++) {
+ status = ETH_STATUS(dev);
+ //printf ("Issue: status 0x%4x.\n", status);
+ return 1;
+ udelay(10);
+ }
+ PRINTF("Ethernet command: 0x%4x did not complete! Status: 0x%4x\n", command, ETH_STATUS(dev) );
+ return 0;
+}
+
+/* Determine network media type and set up 3com accordingly */
+/* I think I'm going to start with something known first like 10baseT */
+
+static int auto_negotiate(struct eth_device* dev)
+{
+ int i;
+
+ EL3WINDOW(dev, 1);
+
+ // Wait for Auto negotiation to complete
+ for (i = 0; i <= 1000; i++)
+ {
+ if (ETH_INW(dev, 2) & 0x04)
+ break;
+ udelay(100);
+
+ if (i == 1000)
+ {
+ PRINTF("Error: Auto negotiation failed\n");
+ return 0;
+ }
+ }
+
+
+
+ return 1;
+}
+
+void eth_interrupt(struct eth_device *dev)
+{
+ u16 status = ETH_STATUS(dev);
+
+ printf("eth0: status = 0x%04x\n", status);
+
+ if (!(status & IntLatch))
+ return;
+
+ if (status & (1<<6))
+ {
+ ETH_CMD(dev, AckIntr | (1<<6));
+ printf("Acknowledged Interrupt command\n");
+ }
+
+ if (status & DownComplete)
+ {
+ ETH_CMD(dev, AckIntr | DownComplete);
+ printf("Acknowledged DownComplete\n");
+ }
+
+ if (status & UpComplete)
+ {
+ ETH_CMD(dev, AckIntr | UpComplete);
+ printf("Acknowledged UpComplete\n");
+ }
+
+ ETH_CMD(dev, AckIntr | IntLatch);
+ printf("Acknowledged IntLatch\n");
+}
+
+int eth_3com_initialize(bd_t *bis)
+{
+ u32 eth_iobase = 0, status;
+ int card_number = 0, ret;
+ struct eth_device* dev;
+ pci_dev_t devno;
+ char *s;
+
+ s = getenv("3com_base");
+
+ /* Find ethernet controller on the PCI bus */
+
+ if ((devno = pci_find_device(PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3C905C, 0)) < 0)
+ {
+ PRINTF("Error: Cannot find the ethernet device on the PCI bus\n");
+ goto Done;
+ }
+
+ if (s)
+ {
+ unsigned long base = atoi(s);
+ pci_write_config_dword(devno, PCI_BASE_ADDRESS_0, base | 0x01);
+ }
+
+ ret = pci_read_config_dword(devno, PCI_BASE_ADDRESS_0, ð_iobase);
+ eth_iobase &= ~0xf;
+
+ PRINTF("eth: 3Com Found at Address: 0x%x\n", eth_iobase);
+
+ pci_write_config_dword(devno, PCI_COMMAND, PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
+
+ /* Check if I/O accesses and Bus Mastering are enabled */
+
+ ret = pci_read_config_dword(devno, PCI_COMMAND, &status);
+
+ if (!(status & PCI_COMMAND_IO))
+ {
+ printf("Error: Cannot enable IO access.\n");
+ goto Done;
+ }
+
+ if (!(status & PCI_COMMAND_MEMORY))
+ {
+ printf("Error: Cannot enable MEMORY access.\n");
+ goto Done;
+ }
+
+ if (!(status & PCI_COMMAND_MASTER))
+ {
+ printf("Error: Cannot enable Bus Mastering.\n");
+ goto Done;
+ }
+
+ dev = (struct eth_device*) malloc(sizeof(*dev)); //struct eth_device));
+
+ sprintf(dev->name, "3Com 3c920c#%d", card_number);
+ dev->iobase = eth_iobase;
+ dev->priv = (void*) devno;
+ dev->init = eth_3com_init;
+ dev->halt = eth_3com_halt;
+ dev->send = eth_3com_send;
+ dev->recv = eth_3com_recv;
+
+ eth_register(dev);
+
+/* { */
+/* char interrupt; */
+/* devno = pci_find_device(PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3C905C, 0); */
+/* pci_read_config_byte(devno, PCI_INTERRUPT_LINE, &interrupt); */
+
+/* printf("Installing eth0 interrupt handler to %d\n", interrupt); */
+/* irq_install_handler(interrupt, eth_interrupt, dev); */
+/* } */
+
+ card_number++;
+
+ /* Set the latency timer for value */
+ s = getenv("3com_latency");
+ if (s)
+ {
+ ret = pci_write_config_byte(devno, PCI_LATENCY_TIMER, (unsigned char)atoi(s));
+ }
+ else ret = pci_write_config_byte(devno, PCI_LATENCY_TIMER, 0x0a);
+
+ read_hw_addr(dev, bis); /* get the MAC address from Window 2*/
+
+ /* Reset the ethernet controller */
+
+ PRINTF ("Issuing reset command....\n");
+ if (!issue_and_wait(dev, TotalReset))
+ {
+ printf("Error: Cannot reset ethernet controller.\n");
+ goto Done;
+ }
+ else
+ PRINTF ("Ethernet controller reset.\n");
+
+ /* allocate memory for rx and tx rings */
+
+ if(!(rx_ring = memalign(sizeof(struct rx_desc_3com) * NUM_RX_DESC, 16)))
+ {
+ PRINTF ("Cannot allocate memory for RX_RING.....\n");
+ goto Done;
+ }
+
+ if (!(tx_ring = memalign(sizeof(struct tx_desc_3com) * NUM_TX_DESC, 16)))
+ {
+ PRINTF ("Cannot allocate memory for TX_RING.....\n");
+ goto Done;
+ }
+
+Done:
+ return status;
+}
+
+
+static int eth_3com_init(struct eth_device* dev, bd_t *bis)
+{
+ int i, status = 0;
+ int tx_cur, loop;
+ u16 status_enable, intr_enable;
+ struct descriptor *ias_cmd;
+
+ /* Determine what type of network the machine is connected to */
+ /* presently drops the connect to 10Mbps */
+
+ if (!auto_negotiate(dev))
+ {
+ printf("Error: Cannot determine network media.\n");
+ goto Done;
+ }
+
+ issue_and_wait(dev, TxReset);
+ issue_and_wait(dev, RxReset|0x04);
+
+ /* Switch to register set 7 for normal use. */
+ EL3WINDOW(dev, 7);
+
+ /* Initialize Rx and Tx rings */
+
+ init_rx_ring(dev);
+ purge_tx_ring(dev);
+
+ ETH_CMD(dev, SetRxFilter | RxStation | RxBroadcast | RxProm);
+
+ issue_and_wait(dev,SetTxStart|0x07ff);
+
+ /* Below sets which indication bits to be seen. */
+
+ status_enable = SetStatusEnb | HostError | DownComplete | UpComplete | (1<<6);
+ ETH_CMD(dev, status_enable);
+
+ /* Below sets no bits are to cause an interrupt since this is just polling */
+
+ intr_enable = SetIntrEnb;
+// intr_enable = SetIntrEnb | (1<<9) | (1<<10) | (1<<6);
+ ETH_CMD(dev, intr_enable);
+ ETH_OUTB(dev, 127, UpPoll);
+
+ /* Ack all pending events, and set active indicator mask */
+
+ ETH_CMD(dev, AckIntr | IntLatch | TxAvailable | RxEarly | IntReq);
+ ETH_CMD(dev, intr_enable);
+
+ /* Tell the adapter where the RX ring is located */
+
+ issue_and_wait(dev,UpStall); /* Stall and set the UplistPtr */
+ ETH_OUTL(dev, (u32)&rx_ring[rx_next], UpListPtr);
+ ETH_CMD(dev, RxEnable); /* Enable the receiver. */
+ issue_and_wait(dev,UpUnstall);
+
+ /* Send the Individual Address Setup frame */
+
+ tx_cur = tx_next;
+ tx_next = ((tx_next+1) % NUM_TX_DESC);
+
+ ias_cmd = (struct descriptor *)&tx_ring[tx_cur];
+ ias_cmd->status = cpu_to_le32(1<<31); /* set DnIndicate bit. */
+ ias_cmd->next = 0;
+ ias_cmd->addr = cpu_to_le32((u32)&bis->bi_enetaddr[0]);
+ ias_cmd->length = cpu_to_le32(6 | LAST_FRAG);
+
+ /* Tell the adapter where the TX ring is located */
+
+ ETH_CMD(dev, TxEnable); /* Enable transmitter. */
+ issue_and_wait(dev, DownStall); /* Stall and set the DownListPtr. */
+ ETH_OUTL(dev, (u32)&tx_ring[tx_cur], DownListPtr);
+ issue_and_wait(dev, DownUnstall);
+ for (i=0; !(ETH_STATUS(dev) & DownComplete); i++)
+ {
+ if (i >= TOUT_LOOP)
+ {
+ PRINTF("TX Ring status (Init): 0x%4x\n", le32_to_cpu(tx_ring[tx_cur].status));
+ PRINTF("ETH_STATUS: 0x%x\n", ETH_STATUS(dev));
+ goto Done;
+ }
+ }
+ if (ETH_STATUS(dev) & DownComplete) /* If DownLoad Complete ACK the bit */
+ {
+ ETH_CMD(dev, AckIntr | DownComplete); /* acknowledge the indication bit */
+ issue_and_wait(dev, DownStall); /* stall and clear DownListPtr */
+ ETH_OUTL(dev, 0, DownListPtr);
+ issue_and_wait(dev, DownUnstall);
+ }
+ status = 1;
+
+Done:
+ return status;
+}
+
+int eth_3com_send(struct eth_device* dev, volatile void *packet, int length)
+{
+ int i, status = 0;
+ int tx_cur;
+
+ if (length <= 0)
+ {
+ PRINTF("eth: bad packet size: %d\n", length);
+ goto Done;
+ }
+
+ tx_cur = tx_next;
+ tx_next = (tx_next+1) % NUM_TX_DESC;
+
+ tx_ring[tx_cur].status = cpu_to_le32(1<<31); /* set DnIndicate bit */
+ tx_ring[tx_cur].next = 0;
+ tx_ring[tx_cur].addr = cpu_to_le32(((u32) packet));
+ tx_ring[tx_cur].length = cpu_to_le32(length | LAST_FRAG);
+
+ /* Send the packet */
+
+ issue_and_wait(dev, DownStall); /* stall and set the DownListPtr */
+ ETH_OUTL(dev, (u32) &tx_ring[tx_cur], DownListPtr);
+ issue_and_wait(dev, DownUnstall);
+
+ for (i=0; !(ETH_STATUS(dev) & DownComplete); i++)
+ {
+ if (i >= TOUT_LOOP)
+ {
+ PRINTF("TX Ring status (send): 0x%4x\n", le32_to_cpu(tx_ring[tx_cur].status));
+ goto Done;
+ }
+ }
+ if (ETH_STATUS(dev) & DownComplete) /* If DownLoad Complete ACK the bit */
+ {
+ ETH_CMD(dev, AckIntr | DownComplete); /* acknowledge the indication bit */
+ issue_and_wait(dev, DownStall); /* stall and clear DownListPtr */
+ ETH_OUTL(dev, 0, DownListPtr);
+ issue_and_wait(dev, DownUnstall);
+ }
+ status=1;
+ Done:
+ return status;
+}
+
+void PrintPacket (uchar *packet, int length)
+{
+int loop;
+uchar *ptr;
+
+ printf ("Printing packet of length %x.\n\n", length);
+ ptr = packet;
+ for (loop = 1; loop <= length; loop++)
+ {
+ printf ("%2x ", *ptr++);
+ if ((loop % 40)== 0)
+ printf ("\n");
+ }
+}
+
+int eth_3com_recv(struct eth_device* dev)
+{
+ u16 stat = 0;
+ u32 status;
+ int rx_prev, length = 0;
+
+ while (!(ETH_STATUS(dev) & UpComplete)) /* wait on receipt of packet */
+ ;
+
+ status = le32_to_cpu(rx_ring[rx_next].status); /* packet status */
+
+ while (status & (1<<15))
+ {
+ /* A packet has been received */
+
+ if (status & (1<<15))
+ {
+ /* A valid frame received */
+
+ length = le32_to_cpu(rx_ring[rx_next].status) & 0x1fff; /* length is in bits 0 - 12 */
+
+ /* Pass the packet up to the protocol layers */
+
+ NetReceive((uchar *)le32_to_cpu(rx_ring[rx_next].addr), length);
+ rx_ring[rx_next].status = 0; /* clear the status word */
+ ETH_CMD(dev, AckIntr | UpComplete);
+ issue_and_wait(dev, UpUnstall);
+ }
+ else
+ if (stat & HostError)
+ {
+ /* There was an error */
+
+ printf("Rx error status: 0x%4x\n", stat);
+ init_rx_ring(dev);
+ goto Done;
+ }
+
+ rx_prev = rx_next;
+ rx_next = (rx_next + 1) % NUM_RX_DESC;
+ stat = ETH_STATUS(dev); /* register status */
+ status = le32_to_cpu(rx_ring[rx_next].status); /* packet status */
+ }
+
+Done:
+ return length;
+}
+
+void eth_3com_halt(struct eth_device* dev)
+{
+ if (!(dev->iobase))
+ {
+ goto Done;
+ }
+
+ issue_and_wait(dev, DownStall); /* shut down transmit and receive */
+ issue_and_wait(dev, UpStall);
+ issue_and_wait(dev, RxDisable);
+ issue_and_wait(dev, TxDisable);
+
+// free(tx_ring); /* release memory allocated to the DPD and UPD rings */
+// free(rx_ring);
+
+Done:
+ return;
+}
+
+static void init_rx_ring(struct eth_device* dev)
+{
+ int i;
+
+ PRINTF("Initializing rx_ring. rx_buffer = %p\n", rx_buffer);
+ issue_and_wait(dev, UpStall);
+
+ for (i = 0; i < NUM_RX_DESC; i++)
+ {
+ rx_ring[i].next = cpu_to_le32(((u32) &rx_ring[(i+1) % NUM_RX_DESC]));
+ rx_ring[i].status = 0;
+ rx_ring[i].addr = cpu_to_le32(((u32) &rx_buffer[i][0]));
+ rx_ring[i].length = cpu_to_le32(PKTSIZE_ALIGN | LAST_FRAG);
+ }
+ rx_next = 0;
+}
+
+static void purge_tx_ring(struct eth_device* dev)
+{
+ int i;
+
+ PRINTF("Purging tx_ring.\n");
+
+ tx_next = 0;
+
+ for (i = 0; i < NUM_TX_DESC; i++)
+ {
+ tx_ring[i].next = 0;
+ tx_ring[i].status = 0;
+ tx_ring[i].addr = 0;
+ tx_ring[i].length = 0;
+ }
+}
+
+static void read_hw_addr(struct eth_device* dev, bd_t *bis)
+{
+ u8 hw_addr[ETH_ALEN];
+ unsigned int eeprom[0x40];
+ unsigned int checksum = 0;
+ int i, j, timer;
+
+ /* Read the station address from the EEPROM. */
+
+ EL3WINDOW(dev, 0);
+ for (i = 0; i < 0x40; i++)
+ {
+ ETH_OUTW(dev, EEPROM_Read + i, Wn0EepromCmd);
+ /* Pause for at least 162 us. for the read to take place. */
+ for (timer = 10; timer >= 0; timer--)
+ {
+ udelay(162);
+ if ((ETH_INW(dev, Wn0EepromCmd) & 0x8000) == 0)
+ break;
+ }
+ eeprom[i] = ETH_INW(dev, Wn0EepromData);
+ }
+
+ /* Checksum calculation. I'm not sure about this part and there seems to be a bug on the 3com side of things */
+
+ for (i = 0; i < 0x21; i++)
+ checksum ^= eeprom[i];
+ checksum = (checksum ^ (checksum >> 8)) & 0xff;
+
+ if (checksum != 0xbb)
+ printf(" *** INVALID EEPROM CHECKSUM %4.4x *** \n", checksum);
+
+ for (i = 0, j = 0; i < 3; i++)
+ {
+ hw_addr[j++] = (u8)((eeprom[i+10] >> 8) & 0xff);
+ hw_addr[j++] = (u8)(eeprom[i+10] & 0xff);
+ }
+
+ /* MAC Address is in window 2, write value from EEPROM to window 2 */
+
+ EL3WINDOW(dev, 2);
+ for (i = 0; i < 6; i++)
+ ETH_OUTB(dev, hw_addr[i], i);
+
+ for (j = 0; j < ETH_ALEN; j+=2)
+ {
+ hw_addr[j] = (u8)(ETH_INW(dev, j) & 0xff);
+ hw_addr[j+1] = (u8)((ETH_INW(dev, j) >> 8) & 0xff);
+ }
+
+ for (i=0;i<ETH_ALEN;i++)
+ {
+ if (hw_addr[i] != bis->bi_enetaddr[i])
+ {
+/* printf("Warning: HW address don't match:\n"); */
+/* printf("Address in 3Com Window 2 is " */
+/* "%02X:%02X:%02X:%02X:%02X:%02X\n", */
+/* hw_addr[0], hw_addr[1], hw_addr[2], */
+/* hw_addr[3], hw_addr[4], hw_addr[5]); */
+/* printf("Address used by U-Boot is " */
+/* "%02X:%02X:%02X:%02X:%02X:%02X\n", */
+/* bis->bi_enetaddr[0], bis->bi_enetaddr[1], */
+/* bis->bi_enetaddr[2], bis->bi_enetaddr[3], */
+/* bis->bi_enetaddr[4], bis->bi_enetaddr[5]); */
+/* goto Done; */
+ char buffer[256];
+ if (bis->bi_enetaddr[0] == 0 && bis->bi_enetaddr[1] == 0 &&
+ bis->bi_enetaddr[2] == 0 && bis->bi_enetaddr[3] == 0 &&
+ bis->bi_enetaddr[4] == 0 && bis->bi_enetaddr[5] == 0)
+ {
+
+ sprintf(buffer, "%02X:%02X:%02X:%02X:%02X:%02X",
+ hw_addr[0], hw_addr[1], hw_addr[2],
+ hw_addr[3], hw_addr[4], hw_addr[5]);
+ setenv("ethaddr", buffer);
+ }
+ }
+ }
+
+ for(i=0; i<ETH_ALEN; i++) dev->enetaddr[i] = hw_addr[i];
+
+Done:
+ return;
+}
+