upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
820 lines
20 KiB
820 lines
20 KiB
/*------------------------------------------------------------------------
|
|
* lan91c96.c
|
|
* This is a driver for SMSC's LAN91C96 single-chip Ethernet device, based
|
|
* on the SMC91111 driver from U-boot.
|
|
*
|
|
* (C) Copyright 2002
|
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
* Rolf Offermanns <rof@sysgo.de>
|
|
*
|
|
* Copyright (C) 2001 Standard Microsystems Corporation (SMSC)
|
|
* Developed by Simple Network Magic Corporation (SNMC)
|
|
* Copyright (C) 1996 by Erik Stahlman (ES)
|
|
*
|
|
* 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
|
|
*
|
|
* Information contained in this file was obtained from the LAN91C96
|
|
* manual from SMC. To get a copy, if you really want one, you can find
|
|
* information under www.smsc.com.
|
|
*
|
|
*
|
|
* "Features" of the SMC chip:
|
|
* 6144 byte packet memory. ( for the 91C96 )
|
|
* EEPROM for configuration
|
|
* AUI/TP selection ( mine has 10Base2/10BaseT select )
|
|
*
|
|
* Arguments:
|
|
* io = for the base address
|
|
* irq = for the IRQ
|
|
*
|
|
* author:
|
|
* Erik Stahlman ( erik@vt.edu )
|
|
* Daris A Nevil ( dnevil@snmc.com )
|
|
*
|
|
*
|
|
* Hardware multicast code from Peter Cammaert ( pc@denkart.be )
|
|
*
|
|
* Sources:
|
|
* o SMSC LAN91C96 databook (www.smsc.com)
|
|
* o smc91111.c (u-boot driver)
|
|
* o smc9194.c (linux kernel driver)
|
|
* o lan91c96.c (Intel Diagnostic Manager driver)
|
|
*
|
|
* History:
|
|
* 04/30/03 Mathijs Haarman Modified smc91111.c (u-boot version)
|
|
* for lan91c96
|
|
*---------------------------------------------------------------------------
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <malloc.h>
|
|
#include "lan91c96.h"
|
|
#include <net.h>
|
|
|
|
/*------------------------------------------------------------------------
|
|
*
|
|
* Configuration options, for the experienced user to change.
|
|
*
|
|
-------------------------------------------------------------------------*/
|
|
|
|
/* Use power-down feature of the chip */
|
|
#define POWER_DOWN 0
|
|
|
|
/*
|
|
* Wait time for memory to be free. This probably shouldn't be
|
|
* tuned that much, as waiting for this means nothing else happens
|
|
* in the system
|
|
*/
|
|
#define MEMORY_WAIT_TIME 16
|
|
|
|
#define SMC_DEBUG 0
|
|
|
|
#if (SMC_DEBUG > 2 )
|
|
#define PRINTK3(args...) printf(args)
|
|
#else
|
|
#define PRINTK3(args...)
|
|
#endif
|
|
|
|
#if SMC_DEBUG > 1
|
|
#define PRINTK2(args...) printf(args)
|
|
#else
|
|
#define PRINTK2(args...)
|
|
#endif
|
|
|
|
#ifdef SMC_DEBUG
|
|
#define PRINTK(args...) printf(args)
|
|
#else
|
|
#define PRINTK(args...)
|
|
#endif
|
|
|
|
|
|
/*------------------------------------------------------------------------
|
|
*
|
|
* The internal workings of the driver. If you are changing anything
|
|
* here with the SMC stuff, you should have the datasheet and know
|
|
* what you are doing.
|
|
*
|
|
*------------------------------------------------------------------------
|
|
*/
|
|
#define DRIVER_NAME "LAN91C96"
|
|
#define SMC_ALLOC_MAX_TRY 5
|
|
#define SMC_TX_TIMEOUT 30
|
|
|
|
#define ETH_ZLEN 60
|
|
|
|
#ifdef CONFIG_LAN91C96_USE_32_BIT
|
|
#define USE_32_BIT 1
|
|
#else
|
|
#undef USE_32_BIT
|
|
#endif
|
|
|
|
/* See if a MAC address is defined in the current environment. If so use it. If not
|
|
. print a warning and set the environment and other globals with the default.
|
|
. If an EEPROM is present it really should be consulted.
|
|
*/
|
|
static int smc_get_ethaddr(bd_t *bd, struct eth_device *dev);
|
|
static int get_rom_mac(struct eth_device *dev, unsigned char *v_rom_mac);
|
|
|
|
/* ------------------------------------------------------------
|
|
* Internal routines
|
|
* ------------------------------------------------------------
|
|
*/
|
|
|
|
static unsigned char smc_mac_addr[] = { 0xc0, 0x00, 0x00, 0x1b, 0x62, 0x9c };
|
|
|
|
/*
|
|
* This function must be called before smc_open() if you want to override
|
|
* the default mac address.
|
|
*/
|
|
|
|
static void smc_set_mac_addr(const unsigned char *addr)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < sizeof (smc_mac_addr); i++) {
|
|
smc_mac_addr[i] = addr[i];
|
|
}
|
|
}
|
|
|
|
/***********************************************
|
|
* Show available memory *
|
|
***********************************************/
|
|
void dump_memory_info(struct eth_device *dev)
|
|
{
|
|
word mem_info;
|
|
word old_bank;
|
|
|
|
old_bank = SMC_inw(dev, LAN91C96_BANK_SELECT) & 0xF;
|
|
|
|
SMC_SELECT_BANK(dev, 0);
|
|
mem_info = SMC_inw(dev, LAN91C96_MIR);
|
|
PRINTK2 ("Memory: %4d available\n", (mem_info >> 8) * 2048);
|
|
|
|
SMC_SELECT_BANK(dev, old_bank);
|
|
}
|
|
|
|
/*
|
|
* A rather simple routine to print out a packet for debugging purposes.
|
|
*/
|
|
#if SMC_DEBUG > 2
|
|
static void print_packet (byte *, int);
|
|
#endif
|
|
|
|
static int poll4int (struct eth_device *dev, byte mask, int timeout)
|
|
{
|
|
int tmo = get_timer (0) + timeout * CONFIG_SYS_HZ;
|
|
int is_timeout = 0;
|
|
word old_bank = SMC_inw(dev, LAN91C96_BANK_SELECT);
|
|
|
|
PRINTK2 ("Polling...\n");
|
|
SMC_SELECT_BANK(dev, 2);
|
|
while ((SMC_inw(dev, LAN91C96_INT_STATS) & mask) == 0) {
|
|
if (get_timer (0) >= tmo) {
|
|
is_timeout = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* restore old bank selection */
|
|
SMC_SELECT_BANK(dev, old_bank);
|
|
|
|
if (is_timeout)
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function: smc_reset
|
|
* Purpose:
|
|
* This sets the SMC91111 chip to its normal state, hopefully from whatever
|
|
* mess that any other DOS driver has put it in.
|
|
*
|
|
* Maybe I should reset more registers to defaults in here? SOFTRST should
|
|
* do that for me.
|
|
*
|
|
* Method:
|
|
* 1. send a SOFT RESET
|
|
* 2. wait for it to finish
|
|
* 3. enable autorelease mode
|
|
* 4. reset the memory management unit
|
|
* 5. clear all interrupts
|
|
*
|
|
*/
|
|
static void smc_reset(struct eth_device *dev)
|
|
{
|
|
PRINTK2("%s:smc_reset\n", dev->name);
|
|
|
|
/* This resets the registers mostly to defaults, but doesn't
|
|
affect EEPROM. That seems unnecessary */
|
|
SMC_SELECT_BANK(dev, 0);
|
|
SMC_outw(dev, LAN91C96_RCR_SOFT_RST, LAN91C96_RCR);
|
|
|
|
udelay (10);
|
|
|
|
/* Disable transmit and receive functionality */
|
|
SMC_outw(dev, 0, LAN91C96_RCR);
|
|
SMC_outw(dev, 0, LAN91C96_TCR);
|
|
|
|
/* set the control register */
|
|
SMC_SELECT_BANK(dev, 1);
|
|
SMC_outw(dev, SMC_inw(dev, LAN91C96_CONTROL) | LAN91C96_CTR_BIT_8,
|
|
LAN91C96_CONTROL);
|
|
|
|
/* Disable all interrupts */
|
|
SMC_outb(dev, 0, LAN91C96_INT_MASK);
|
|
}
|
|
|
|
/*
|
|
* Function: smc_enable
|
|
* Purpose: let the chip talk to the outside work
|
|
* Method:
|
|
* 1. Initialize the Memory Configuration Register
|
|
* 2. Enable the transmitter
|
|
* 3. Enable the receiver
|
|
*/
|
|
static void smc_enable(struct eth_device *dev)
|
|
{
|
|
PRINTK2("%s:smc_enable\n", dev->name);
|
|
SMC_SELECT_BANK(dev, 0);
|
|
|
|
/* Initialize the Memory Configuration Register. See page
|
|
49 of the LAN91C96 data sheet for details. */
|
|
SMC_outw(dev, LAN91C96_MCR_TRANSMIT_PAGES, LAN91C96_MCR);
|
|
|
|
/* Initialize the Transmit Control Register */
|
|
SMC_outw(dev, LAN91C96_TCR_TXENA, LAN91C96_TCR);
|
|
/* Initialize the Receive Control Register
|
|
* FIXME:
|
|
* The promiscuous bit set because I could not receive ARP reply
|
|
* packets from the server when I send a ARP request. It only works
|
|
* when I set the promiscuous bit
|
|
*/
|
|
SMC_outw(dev, LAN91C96_RCR_RXEN | LAN91C96_RCR_PRMS, LAN91C96_RCR);
|
|
}
|
|
|
|
/*
|
|
* Function: smc_shutdown
|
|
* Purpose: closes down the SMC91xxx chip.
|
|
* Method:
|
|
* 1. zero the interrupt mask
|
|
* 2. clear the enable receive flag
|
|
* 3. clear the enable xmit flags
|
|
*
|
|
* TODO:
|
|
* (1) maybe utilize power down mode.
|
|
* Why not yet? Because while the chip will go into power down mode,
|
|
* the manual says that it will wake up in response to any I/O requests
|
|
* in the register space. Empirical results do not show this working.
|
|
*/
|
|
static void smc_shutdown(struct eth_device *dev)
|
|
{
|
|
PRINTK2("%s:smc_shutdown\n", dev->name);
|
|
|
|
/* no more interrupts for me */
|
|
SMC_SELECT_BANK(dev, 2);
|
|
SMC_outb(dev, 0, LAN91C96_INT_MASK);
|
|
|
|
/* and tell the card to stay away from that nasty outside world */
|
|
SMC_SELECT_BANK(dev, 0);
|
|
SMC_outb(dev, 0, LAN91C96_RCR);
|
|
SMC_outb(dev, 0, LAN91C96_TCR);
|
|
}
|
|
|
|
|
|
/*
|
|
* Function: smc_hardware_send_packet(struct net_device * )
|
|
* Purpose:
|
|
* This sends the actual packet to the SMC9xxx chip.
|
|
*
|
|
* Algorithm:
|
|
* First, see if a saved_skb is available.
|
|
* ( this should NOT be called if there is no 'saved_skb'
|
|
* Now, find the packet number that the chip allocated
|
|
* Point the data pointers at it in memory
|
|
* Set the length word in the chip's memory
|
|
* Dump the packet to chip memory
|
|
* Check if a last byte is needed ( odd length packet )
|
|
* if so, set the control flag right
|
|
* Tell the card to send it
|
|
* Enable the transmit interrupt, so I know if it failed
|
|
* Free the kernel data if I actually sent it.
|
|
*/
|
|
static int smc_send_packet(struct eth_device *dev, volatile void *packet,
|
|
int packet_length)
|
|
{
|
|
byte packet_no;
|
|
unsigned long ioaddr;
|
|
byte *buf;
|
|
int length;
|
|
int numPages;
|
|
int try = 0;
|
|
int time_out;
|
|
byte status;
|
|
|
|
|
|
PRINTK3("%s:smc_hardware_send_packet\n", dev->name);
|
|
|
|
length = ETH_ZLEN < packet_length ? packet_length : ETH_ZLEN;
|
|
|
|
/* allocate memory
|
|
** The MMU wants the number of pages to be the number of 256 bytes
|
|
** 'pages', minus 1 ( since a packet can't ever have 0 pages :) )
|
|
**
|
|
** The 91C111 ignores the size bits, but the code is left intact
|
|
** for backwards and future compatibility.
|
|
**
|
|
** Pkt size for allocating is data length +6 (for additional status
|
|
** words, length and ctl!)
|
|
**
|
|
** If odd size then last byte is included in this header.
|
|
*/
|
|
numPages = ((length & 0xfffe) + 6);
|
|
numPages >>= 8; /* Divide by 256 */
|
|
|
|
if (numPages > 7) {
|
|
printf("%s: Far too big packet error. \n", dev->name);
|
|
return 0;
|
|
}
|
|
|
|
/* now, try to allocate the memory */
|
|
|
|
SMC_SELECT_BANK(dev, 2);
|
|
SMC_outw(dev, LAN91C96_MMUCR_ALLOC_TX | numPages, LAN91C96_MMU);
|
|
|
|
again:
|
|
try++;
|
|
time_out = MEMORY_WAIT_TIME;
|
|
do {
|
|
status = SMC_inb(dev, LAN91C96_INT_STATS);
|
|
if (status & LAN91C96_IST_ALLOC_INT) {
|
|
|
|
SMC_outb(dev, LAN91C96_IST_ALLOC_INT,
|
|
LAN91C96_INT_STATS);
|
|
break;
|
|
}
|
|
} while (--time_out);
|
|
|
|
if (!time_out) {
|
|
PRINTK2 ("%s: memory allocation, try %d failed ...\n",
|
|
dev->name, try);
|
|
if (try < SMC_ALLOC_MAX_TRY)
|
|
goto again;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
PRINTK2 ("%s: memory allocation, try %d succeeded ...\n",
|
|
dev->name, try);
|
|
|
|
/* I can send the packet now.. */
|
|
|
|
ioaddr = dev->iobase;
|
|
|
|
buf = (byte *) packet;
|
|
|
|
/* If I get here, I _know_ there is a packet slot waiting for me */
|
|
packet_no = SMC_inb(dev, LAN91C96_ARR);
|
|
if (packet_no & LAN91C96_ARR_FAILED) {
|
|
/* or isn't there? BAD CHIP! */
|
|
printf("%s: Memory allocation failed. \n", dev->name);
|
|
return 0;
|
|
}
|
|
|
|
/* we have a packet address, so tell the card to use it */
|
|
SMC_outb(dev, packet_no, LAN91C96_PNR);
|
|
|
|
/* point to the beginning of the packet */
|
|
SMC_outw(dev, LAN91C96_PTR_AUTO_INCR, LAN91C96_POINTER);
|
|
|
|
PRINTK3("%s: Trying to xmit packet of length %x\n",
|
|
dev->name, length);
|
|
|
|
#if SMC_DEBUG > 2
|
|
printf ("Transmitting Packet\n");
|
|
print_packet (buf, length);
|
|
#endif
|
|
|
|
/* send the packet length ( +6 for status, length and ctl byte )
|
|
and the status word ( set to zeros ) */
|
|
#ifdef USE_32_BIT
|
|
SMC_outl(dev, (length + 6) << 16, LAN91C96_DATA_HIGH);
|
|
#else
|
|
SMC_outw(dev, 0, LAN91C96_DATA_HIGH);
|
|
/* send the packet length ( +6 for status words, length, and ctl */
|
|
SMC_outw(dev, (length + 6), LAN91C96_DATA_HIGH);
|
|
#endif /* USE_32_BIT */
|
|
|
|
/* send the actual data
|
|
* I _think_ it's faster to send the longs first, and then
|
|
* mop up by sending the last word. It depends heavily
|
|
* on alignment, at least on the 486. Maybe it would be
|
|
* a good idea to check which is optimal? But that could take
|
|
* almost as much time as is saved?
|
|
*/
|
|
#ifdef USE_32_BIT
|
|
SMC_outsl(dev, LAN91C96_DATA_HIGH, buf, length >> 2);
|
|
if (length & 0x2)
|
|
SMC_outw(dev, *((word *) (buf + (length & 0xFFFFFFFC))),
|
|
LAN91C96_DATA_HIGH);
|
|
#else
|
|
SMC_outsw(dev, LAN91C96_DATA_HIGH, buf, (length) >> 1);
|
|
#endif /* USE_32_BIT */
|
|
|
|
/* Send the last byte, if there is one. */
|
|
if ((length & 1) == 0) {
|
|
SMC_outw(dev, 0, LAN91C96_DATA_HIGH);
|
|
} else {
|
|
SMC_outw(dev, buf[length - 1] | 0x2000, LAN91C96_DATA_HIGH);
|
|
}
|
|
|
|
/* and let the chipset deal with it */
|
|
SMC_outw(dev, LAN91C96_MMUCR_ENQUEUE, LAN91C96_MMU);
|
|
|
|
/* poll for TX INT */
|
|
if (poll4int (dev, LAN91C96_MSK_TX_INT, SMC_TX_TIMEOUT)) {
|
|
/* sending failed */
|
|
PRINTK2("%s: TX timeout, sending failed...\n", dev->name);
|
|
|
|
/* release packet */
|
|
SMC_outw(dev, LAN91C96_MMUCR_RELEASE_TX, LAN91C96_MMU);
|
|
|
|
/* wait for MMU getting ready (low) */
|
|
while (SMC_inw(dev, LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY)
|
|
udelay (10);
|
|
|
|
PRINTK2("MMU ready\n");
|
|
|
|
|
|
return 0;
|
|
} else {
|
|
/* ack. int */
|
|
SMC_outw(dev, LAN91C96_IST_TX_INT, LAN91C96_INT_STATS);
|
|
|
|
PRINTK2("%s: Sent packet of length %d \n", dev->name, length);
|
|
|
|
/* release packet */
|
|
SMC_outw(dev, LAN91C96_MMUCR_RELEASE_TX, LAN91C96_MMU);
|
|
|
|
/* wait for MMU getting ready (low) */
|
|
while (SMC_inw(dev, LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY)
|
|
udelay (10);
|
|
|
|
PRINTK2 ("MMU ready\n");
|
|
}
|
|
|
|
return length;
|
|
}
|
|
|
|
|
|
/*
|
|
* Open and Initialize the board
|
|
*
|
|
* Set up everything, reset the card, etc ..
|
|
*
|
|
*/
|
|
static int smc_open(bd_t *bd, struct eth_device *dev)
|
|
{
|
|
int i, err; /* used to set hw ethernet address */
|
|
|
|
PRINTK2("%s:smc_open\n", dev->name);
|
|
|
|
/* reset the hardware */
|
|
|
|
smc_reset(dev);
|
|
smc_enable(dev);
|
|
|
|
SMC_SELECT_BANK(dev, 1);
|
|
/* set smc_mac_addr, and sync it with u-boot globals */
|
|
err = smc_get_ethaddr(bd, dev);
|
|
if (err < 0)
|
|
return -1;
|
|
#ifdef USE_32_BIT
|
|
for (i = 0; i < 6; i += 2) {
|
|
word address;
|
|
|
|
address = smc_mac_addr[i + 1] << 8;
|
|
address |= smc_mac_addr[i];
|
|
SMC_outw(dev, address, LAN91C96_IA0 + i);
|
|
}
|
|
#else
|
|
for (i = 0; i < 6; i++)
|
|
SMC_outb(dev, smc_mac_addr[i], LAN91C96_IA0 + i);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
/*-------------------------------------------------------------
|
|
*
|
|
* smc_rcv - receive a packet from the card
|
|
*
|
|
* There is ( at least ) a packet waiting to be read from
|
|
* chip-memory.
|
|
*
|
|
* o Read the status
|
|
* o If an error, record it
|
|
* o otherwise, read in the packet
|
|
*-------------------------------------------------------------
|
|
*/
|
|
static int smc_rcv(struct eth_device *dev)
|
|
{
|
|
int packet_number;
|
|
word status;
|
|
word packet_length;
|
|
int is_error = 0;
|
|
|
|
#ifdef USE_32_BIT
|
|
dword stat_len;
|
|
#endif
|
|
|
|
|
|
SMC_SELECT_BANK(dev, 2);
|
|
packet_number = SMC_inw(dev, LAN91C96_FIFO);
|
|
|
|
if (packet_number & LAN91C96_FIFO_RXEMPTY) {
|
|
return 0;
|
|
}
|
|
|
|
PRINTK3("%s:smc_rcv\n", dev->name);
|
|
/* start reading from the start of the packet */
|
|
SMC_outw(dev, LAN91C96_PTR_READ | LAN91C96_PTR_RCV |
|
|
LAN91C96_PTR_AUTO_INCR, LAN91C96_POINTER);
|
|
|
|
/* First two words are status and packet_length */
|
|
#ifdef USE_32_BIT
|
|
stat_len = SMC_inl(dev, LAN91C96_DATA_HIGH);
|
|
status = stat_len & 0xffff;
|
|
packet_length = stat_len >> 16;
|
|
#else
|
|
status = SMC_inw(dev, LAN91C96_DATA_HIGH);
|
|
packet_length = SMC_inw(dev, LAN91C96_DATA_HIGH);
|
|
#endif
|
|
|
|
packet_length &= 0x07ff; /* mask off top bits */
|
|
|
|
PRINTK2 ("RCV: STATUS %4x LENGTH %4x\n", status, packet_length);
|
|
|
|
if (!(status & FRAME_FILTER)) {
|
|
/* Adjust for having already read the first two words */
|
|
packet_length -= 4; /*4; */
|
|
|
|
|
|
/* set odd length for bug in LAN91C111, */
|
|
/* which never sets RS_ODDFRAME */
|
|
/* TODO ? */
|
|
|
|
|
|
#ifdef USE_32_BIT
|
|
PRINTK3 (" Reading %d dwords (and %d bytes) \n",
|
|
packet_length >> 2, packet_length & 3);
|
|
/* QUESTION: Like in the TX routine, do I want
|
|
to send the DWORDs or the bytes first, or some
|
|
mixture. A mixture might improve already slow PIO
|
|
performance */
|
|
SMC_insl(dev, LAN91C96_DATA_HIGH, NetRxPackets[0],
|
|
packet_length >> 2);
|
|
/* read the left over bytes */
|
|
if (packet_length & 3) {
|
|
int i;
|
|
|
|
byte *tail = (byte *) (NetRxPackets[0] + (packet_length & ~3));
|
|
dword leftover = SMC_inl(dev, LAN91C96_DATA_HIGH);
|
|
|
|
for (i = 0; i < (packet_length & 3); i++)
|
|
*tail++ = (byte) (leftover >> (8 * i)) & 0xff;
|
|
}
|
|
#else
|
|
PRINTK3 (" Reading %d words and %d byte(s) \n",
|
|
(packet_length >> 1), packet_length & 1);
|
|
SMC_insw(dev, LAN91C96_DATA_HIGH, NetRxPackets[0],
|
|
packet_length >> 1);
|
|
|
|
#endif /* USE_32_BIT */
|
|
|
|
#if SMC_DEBUG > 2
|
|
printf ("Receiving Packet\n");
|
|
print_packet((byte *)NetRxPackets[0], packet_length);
|
|
#endif
|
|
} else {
|
|
/* error ... */
|
|
/* TODO ? */
|
|
is_error = 1;
|
|
}
|
|
|
|
while (SMC_inw(dev, LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY)
|
|
udelay (1); /* Wait until not busy */
|
|
|
|
/* error or good, tell the card to get rid of this packet */
|
|
SMC_outw(dev, LAN91C96_MMUCR_RELEASE_RX, LAN91C96_MMU);
|
|
|
|
while (SMC_inw(dev, LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY)
|
|
udelay (1); /* Wait until not busy */
|
|
|
|
if (!is_error) {
|
|
/* Pass the packet up to the protocol layers. */
|
|
NetReceive (NetRxPackets[0], packet_length);
|
|
return packet_length;
|
|
} else {
|
|
return 0;
|
|
}
|
|
|
|
}
|
|
|
|
/*----------------------------------------------------
|
|
* smc_close
|
|
*
|
|
* this makes the board clean up everything that it can
|
|
* and not talk to the outside world. Caused by
|
|
* an 'ifconfig ethX down'
|
|
*
|
|
-----------------------------------------------------*/
|
|
static int smc_close(struct eth_device *dev)
|
|
{
|
|
PRINTK2("%s:smc_close\n", dev->name);
|
|
|
|
/* clear everything */
|
|
smc_shutdown(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if SMC_DEBUG > 2
|
|
static void print_packet(byte *buf, int length)
|
|
{
|
|
#if 0
|
|
int i;
|
|
int remainder;
|
|
int lines;
|
|
|
|
printf ("Packet of length %d \n", length);
|
|
|
|
lines = length / 16;
|
|
remainder = length % 16;
|
|
|
|
for (i = 0; i < lines; i++) {
|
|
int cur;
|
|
|
|
for (cur = 0; cur < 8; cur++) {
|
|
byte a, b;
|
|
|
|
a = *(buf++);
|
|
b = *(buf++);
|
|
printf ("%02x%02x ", a, b);
|
|
}
|
|
printf ("\n");
|
|
}
|
|
for (i = 0; i < remainder / 2; i++) {
|
|
byte a, b;
|
|
|
|
a = *(buf++);
|
|
b = *(buf++);
|
|
printf ("%02x%02x ", a, b);
|
|
}
|
|
printf ("\n");
|
|
#endif /* 0 */
|
|
}
|
|
#endif /* SMC_DEBUG > 2 */
|
|
|
|
static int lan91c96_init(struct eth_device *dev, bd_t *bd)
|
|
{
|
|
return smc_open(bd, dev);
|
|
}
|
|
|
|
static void lan91c96_halt(struct eth_device *dev)
|
|
{
|
|
smc_close(dev);
|
|
}
|
|
|
|
static int lan91c96_recv(struct eth_device *dev)
|
|
{
|
|
return smc_rcv(dev);
|
|
}
|
|
|
|
static int lan91c96_send(struct eth_device *dev, volatile void *packet,
|
|
int length)
|
|
{
|
|
return smc_send_packet(dev, packet, length);
|
|
}
|
|
|
|
/* smc_get_ethaddr
|
|
*
|
|
* This checks both the environment and the ROM for an ethernet address. If
|
|
* found, the environment takes precedence.
|
|
*/
|
|
|
|
static int smc_get_ethaddr(bd_t *bd, struct eth_device *dev)
|
|
{
|
|
uchar v_mac[6];
|
|
|
|
if (!eth_getenv_enetaddr("ethaddr", v_mac)) {
|
|
/* get ROM mac value if any */
|
|
if (!get_rom_mac(dev, v_mac)) {
|
|
printf("\n*** ERROR: ethaddr is NOT set !!\n");
|
|
return -1;
|
|
}
|
|
eth_setenv_enetaddr("ethaddr", v_mac);
|
|
}
|
|
|
|
smc_set_mac_addr(v_mac); /* use old function to update smc default */
|
|
PRINTK("Using MAC Address %pM\n", v_mac);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* get_rom_mac()
|
|
* Note, this has omly been tested for the OMAP730 P2.
|
|
*/
|
|
|
|
static int get_rom_mac(struct eth_device *dev, unsigned char *v_rom_mac)
|
|
{
|
|
#ifdef HARDCODE_MAC /* used for testing or to supress run time warnings */
|
|
char hw_mac_addr[] = { 0x02, 0x80, 0xad, 0x20, 0x31, 0xb8 };
|
|
|
|
memcpy (v_rom_mac, hw_mac_addr, 6);
|
|
return (1);
|
|
#else
|
|
int i;
|
|
SMC_SELECT_BANK(dev, 1);
|
|
for (i=0; i<6; i++)
|
|
{
|
|
v_rom_mac[i] = SMC_inb(dev, LAN91C96_IA0 + i);
|
|
}
|
|
return (1);
|
|
#endif
|
|
}
|
|
|
|
/* Structure to detect the device IDs */
|
|
struct id_type {
|
|
u8 id;
|
|
char *name;
|
|
};
|
|
static struct id_type supported_chips[] = {
|
|
{0, ""}, /* Dummy entry to prevent id check failure */
|
|
{9, "LAN91C110"},
|
|
{8, "LAN91C100FD"},
|
|
{7, "LAN91C100"},
|
|
{5, "LAN91C95"},
|
|
{4, "LAN91C94/96"},
|
|
{3, "LAN91C90/92"},
|
|
};
|
|
/* lan91c96_detect_chip
|
|
* See:
|
|
* http://www.embeddedsys.com/subpages/resources/images/documents/LAN91C96_datasheet.pdf
|
|
* page 71 - that is the closest we get to detect this device
|
|
*/
|
|
static int lan91c96_detect_chip(struct eth_device *dev)
|
|
{
|
|
u8 chip_id;
|
|
int r;
|
|
SMC_SELECT_BANK(dev, 3);
|
|
chip_id = (SMC_inw(dev, 0xA) & LAN91C96_REV_CHIPID) >> 4;
|
|
SMC_SELECT_BANK(dev, 0);
|
|
for (r = 0; r < sizeof(supported_chips) / sizeof(struct id_type); r++)
|
|
if (chip_id == supported_chips[r].id)
|
|
return r;
|
|
return 0;
|
|
}
|
|
|
|
int lan91c96_initialize(u8 dev_num, int base_addr)
|
|
{
|
|
struct eth_device *dev;
|
|
int r = 0;
|
|
|
|
dev = malloc(sizeof(*dev));
|
|
if (!dev) {
|
|
return 0;
|
|
}
|
|
memset(dev, 0, sizeof(*dev));
|
|
|
|
dev->iobase = base_addr;
|
|
|
|
/* Try to detect chip. Will fail if not present. */
|
|
r = lan91c96_detect_chip(dev);
|
|
if (!r) {
|
|
free(dev);
|
|
return 0;
|
|
}
|
|
get_rom_mac(dev, dev->enetaddr);
|
|
|
|
dev->init = lan91c96_init;
|
|
dev->halt = lan91c96_halt;
|
|
dev->send = lan91c96_send;
|
|
dev->recv = lan91c96_recv;
|
|
sprintf(dev->name, "%s-%hu", supported_chips[r].name, dev_num);
|
|
|
|
eth_register(dev);
|
|
return 0;
|
|
}
|
|
|