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
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817 lines
20 KiB
817 lines
20 KiB
/*------------------------------------------------------------------------
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* lan91c96.c
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* This is a driver for SMSC's LAN91C96 single-chip Ethernet device, based
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* on the SMC91111 driver from U-boot.
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Rolf Offermanns <rof@sysgo.de>
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*
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* Copyright (C) 2001 Standard Microsystems Corporation (SMSC)
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* Developed by Simple Network Magic Corporation (SNMC)
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* Copyright (C) 1996 by Erik Stahlman (ES)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Information contained in this file was obtained from the LAN91C96
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* manual from SMC. To get a copy, if you really want one, you can find
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* information under www.smsc.com.
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*
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*
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* "Features" of the SMC chip:
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* 6144 byte packet memory. ( for the 91C96 )
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* EEPROM for configuration
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* AUI/TP selection ( mine has 10Base2/10BaseT select )
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*
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* Arguments:
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* io = for the base address
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* irq = for the IRQ
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*
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* author:
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* Erik Stahlman ( erik@vt.edu )
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* Daris A Nevil ( dnevil@snmc.com )
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*
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*
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* Hardware multicast code from Peter Cammaert ( pc@denkart.be )
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*
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* Sources:
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* o SMSC LAN91C96 databook (www.smsc.com)
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* o smc91111.c (u-boot driver)
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* o smc9194.c (linux kernel driver)
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* o lan91c96.c (Intel Diagnostic Manager driver)
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*
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* History:
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* 04/30/03 Mathijs Haarman Modified smc91111.c (u-boot version)
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* for lan91c96
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*---------------------------------------------------------------------------
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*/
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#include <common.h>
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#include <command.h>
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#include <malloc.h>
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#include "lan91c96.h"
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#include <net.h>
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#include <linux/compiler.h>
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/*------------------------------------------------------------------------
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*
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* Configuration options, for the experienced user to change.
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*
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-------------------------------------------------------------------------*/
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/* Use power-down feature of the chip */
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#define POWER_DOWN 0
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/*
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* Wait time for memory to be free. This probably shouldn't be
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* tuned that much, as waiting for this means nothing else happens
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* in the system
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*/
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#define MEMORY_WAIT_TIME 16
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#define SMC_DEBUG 0
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#if (SMC_DEBUG > 2 )
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#define PRINTK3(args...) printf(args)
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#else
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#define PRINTK3(args...)
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#endif
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#if SMC_DEBUG > 1
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#define PRINTK2(args...) printf(args)
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#else
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#define PRINTK2(args...)
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#endif
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#ifdef SMC_DEBUG
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#define PRINTK(args...) printf(args)
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#else
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#define PRINTK(args...)
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#endif
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/*------------------------------------------------------------------------
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*
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* The internal workings of the driver. If you are changing anything
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* here with the SMC stuff, you should have the datasheet and know
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* what you are doing.
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*
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*------------------------------------------------------------------------
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*/
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#define DRIVER_NAME "LAN91C96"
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#define SMC_ALLOC_MAX_TRY 5
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#define SMC_TX_TIMEOUT 30
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#define ETH_ZLEN 60
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#ifdef CONFIG_LAN91C96_USE_32_BIT
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#define USE_32_BIT 1
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#else
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#undef USE_32_BIT
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#endif
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/* See if a MAC address is defined in the current environment. If so use it. If not
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. print a warning and set the environment and other globals with the default.
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. If an EEPROM is present it really should be consulted.
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*/
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static int smc_get_ethaddr(bd_t *bd, struct eth_device *dev);
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static int get_rom_mac(struct eth_device *dev, unsigned char *v_rom_mac);
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/* ------------------------------------------------------------
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* Internal routines
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* ------------------------------------------------------------
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*/
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static unsigned char smc_mac_addr[] = { 0xc0, 0x00, 0x00, 0x1b, 0x62, 0x9c };
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/*
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* This function must be called before smc_open() if you want to override
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* the default mac address.
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*/
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static void smc_set_mac_addr(const unsigned char *addr)
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{
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int i;
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for (i = 0; i < sizeof (smc_mac_addr); i++) {
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smc_mac_addr[i] = addr[i];
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}
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}
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/***********************************************
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* Show available memory *
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***********************************************/
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void dump_memory_info(struct eth_device *dev)
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{
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__maybe_unused word mem_info;
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word old_bank;
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old_bank = SMC_inw(dev, LAN91C96_BANK_SELECT) & 0xF;
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SMC_SELECT_BANK(dev, 0);
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mem_info = SMC_inw(dev, LAN91C96_MIR);
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PRINTK2 ("Memory: %4d available\n", (mem_info >> 8) * 2048);
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SMC_SELECT_BANK(dev, old_bank);
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}
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/*
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* A rather simple routine to print out a packet for debugging purposes.
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*/
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#if SMC_DEBUG > 2
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static void print_packet (byte *, int);
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#endif
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static int poll4int (struct eth_device *dev, byte mask, int timeout)
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{
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int tmo = get_timer (0) + timeout * CONFIG_SYS_HZ;
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int is_timeout = 0;
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word old_bank = SMC_inw(dev, LAN91C96_BANK_SELECT);
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PRINTK2 ("Polling...\n");
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SMC_SELECT_BANK(dev, 2);
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while ((SMC_inw(dev, LAN91C96_INT_STATS) & mask) == 0) {
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if (get_timer (0) >= tmo) {
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is_timeout = 1;
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break;
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}
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}
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/* restore old bank selection */
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SMC_SELECT_BANK(dev, old_bank);
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if (is_timeout)
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return 1;
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else
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return 0;
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}
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/*
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* Function: smc_reset
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* Purpose:
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* This sets the SMC91111 chip to its normal state, hopefully from whatever
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* mess that any other DOS driver has put it in.
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*
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* Maybe I should reset more registers to defaults in here? SOFTRST should
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* do that for me.
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*
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* Method:
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* 1. send a SOFT RESET
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* 2. wait for it to finish
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* 3. enable autorelease mode
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* 4. reset the memory management unit
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* 5. clear all interrupts
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*
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*/
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static void smc_reset(struct eth_device *dev)
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{
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PRINTK2("%s:smc_reset\n", dev->name);
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/* This resets the registers mostly to defaults, but doesn't
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affect EEPROM. That seems unnecessary */
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SMC_SELECT_BANK(dev, 0);
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SMC_outw(dev, LAN91C96_RCR_SOFT_RST, LAN91C96_RCR);
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udelay (10);
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/* Disable transmit and receive functionality */
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SMC_outw(dev, 0, LAN91C96_RCR);
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SMC_outw(dev, 0, LAN91C96_TCR);
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/* set the control register */
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SMC_SELECT_BANK(dev, 1);
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SMC_outw(dev, SMC_inw(dev, LAN91C96_CONTROL) | LAN91C96_CTR_BIT_8,
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LAN91C96_CONTROL);
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/* Disable all interrupts */
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SMC_outb(dev, 0, LAN91C96_INT_MASK);
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}
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/*
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* Function: smc_enable
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* Purpose: let the chip talk to the outside work
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* Method:
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* 1. Initialize the Memory Configuration Register
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* 2. Enable the transmitter
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* 3. Enable the receiver
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*/
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static void smc_enable(struct eth_device *dev)
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{
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PRINTK2("%s:smc_enable\n", dev->name);
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SMC_SELECT_BANK(dev, 0);
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/* Initialize the Memory Configuration Register. See page
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49 of the LAN91C96 data sheet for details. */
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SMC_outw(dev, LAN91C96_MCR_TRANSMIT_PAGES, LAN91C96_MCR);
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/* Initialize the Transmit Control Register */
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SMC_outw(dev, LAN91C96_TCR_TXENA, LAN91C96_TCR);
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/* Initialize the Receive Control Register
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* FIXME:
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* The promiscuous bit set because I could not receive ARP reply
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* packets from the server when I send a ARP request. It only works
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* when I set the promiscuous bit
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*/
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SMC_outw(dev, LAN91C96_RCR_RXEN | LAN91C96_RCR_PRMS, LAN91C96_RCR);
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}
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/*
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* Function: smc_shutdown
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* Purpose: closes down the SMC91xxx chip.
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* Method:
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* 1. zero the interrupt mask
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* 2. clear the enable receive flag
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* 3. clear the enable xmit flags
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*
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* TODO:
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* (1) maybe utilize power down mode.
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* Why not yet? Because while the chip will go into power down mode,
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* the manual says that it will wake up in response to any I/O requests
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* in the register space. Empirical results do not show this working.
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*/
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static void smc_shutdown(struct eth_device *dev)
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{
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PRINTK2("%s:smc_shutdown\n", dev->name);
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/* no more interrupts for me */
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SMC_SELECT_BANK(dev, 2);
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SMC_outb(dev, 0, LAN91C96_INT_MASK);
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/* and tell the card to stay away from that nasty outside world */
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SMC_SELECT_BANK(dev, 0);
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SMC_outb(dev, 0, LAN91C96_RCR);
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SMC_outb(dev, 0, LAN91C96_TCR);
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}
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/*
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* Function: smc_hardware_send_packet(struct net_device * )
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* Purpose:
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* This sends the actual packet to the SMC9xxx chip.
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*
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* Algorithm:
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* First, see if a saved_skb is available.
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* ( this should NOT be called if there is no 'saved_skb'
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* Now, find the packet number that the chip allocated
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* Point the data pointers at it in memory
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* Set the length word in the chip's memory
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* Dump the packet to chip memory
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* Check if a last byte is needed ( odd length packet )
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* if so, set the control flag right
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* Tell the card to send it
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* Enable the transmit interrupt, so I know if it failed
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* Free the kernel data if I actually sent it.
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*/
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static int smc_send_packet(struct eth_device *dev, void *packet,
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int packet_length)
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{
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byte packet_no;
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byte *buf;
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int length;
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int numPages;
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int try = 0;
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int time_out;
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byte status;
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PRINTK3("%s:smc_hardware_send_packet\n", dev->name);
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length = ETH_ZLEN < packet_length ? packet_length : ETH_ZLEN;
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/* allocate memory
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** The MMU wants the number of pages to be the number of 256 bytes
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** 'pages', minus 1 ( since a packet can't ever have 0 pages :) )
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**
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** The 91C111 ignores the size bits, but the code is left intact
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** for backwards and future compatibility.
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**
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** Pkt size for allocating is data length +6 (for additional status
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** words, length and ctl!)
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**
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** If odd size then last byte is included in this header.
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*/
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numPages = ((length & 0xfffe) + 6);
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numPages >>= 8; /* Divide by 256 */
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if (numPages > 7) {
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printf("%s: Far too big packet error. \n", dev->name);
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return 0;
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}
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/* now, try to allocate the memory */
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SMC_SELECT_BANK(dev, 2);
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SMC_outw(dev, LAN91C96_MMUCR_ALLOC_TX | numPages, LAN91C96_MMU);
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again:
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try++;
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time_out = MEMORY_WAIT_TIME;
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do {
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status = SMC_inb(dev, LAN91C96_INT_STATS);
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if (status & LAN91C96_IST_ALLOC_INT) {
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SMC_outb(dev, LAN91C96_IST_ALLOC_INT,
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LAN91C96_INT_STATS);
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break;
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}
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} while (--time_out);
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if (!time_out) {
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PRINTK2 ("%s: memory allocation, try %d failed ...\n",
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dev->name, try);
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if (try < SMC_ALLOC_MAX_TRY)
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goto again;
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else
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return 0;
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}
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PRINTK2 ("%s: memory allocation, try %d succeeded ...\n",
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dev->name, try);
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/* I can send the packet now.. */
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buf = (byte *) packet;
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/* If I get here, I _know_ there is a packet slot waiting for me */
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packet_no = SMC_inb(dev, LAN91C96_ARR);
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if (packet_no & LAN91C96_ARR_FAILED) {
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/* or isn't there? BAD CHIP! */
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printf("%s: Memory allocation failed. \n", dev->name);
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return 0;
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}
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/* we have a packet address, so tell the card to use it */
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SMC_outb(dev, packet_no, LAN91C96_PNR);
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/* point to the beginning of the packet */
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SMC_outw(dev, LAN91C96_PTR_AUTO_INCR, LAN91C96_POINTER);
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PRINTK3("%s: Trying to xmit packet of length %x\n",
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dev->name, length);
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#if SMC_DEBUG > 2
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printf ("Transmitting Packet\n");
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print_packet (buf, length);
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#endif
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/* send the packet length ( +6 for status, length and ctl byte )
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and the status word ( set to zeros ) */
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#ifdef USE_32_BIT
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SMC_outl(dev, (length + 6) << 16, LAN91C96_DATA_HIGH);
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#else
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SMC_outw(dev, 0, LAN91C96_DATA_HIGH);
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/* send the packet length ( +6 for status words, length, and ctl */
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SMC_outw(dev, (length + 6), LAN91C96_DATA_HIGH);
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#endif /* USE_32_BIT */
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/* send the actual data
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* I _think_ it's faster to send the longs first, and then
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* mop up by sending the last word. It depends heavily
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* on alignment, at least on the 486. Maybe it would be
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* a good idea to check which is optimal? But that could take
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* almost as much time as is saved?
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*/
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#ifdef USE_32_BIT
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SMC_outsl(dev, LAN91C96_DATA_HIGH, buf, length >> 2);
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if (length & 0x2)
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SMC_outw(dev, *((word *) (buf + (length & 0xFFFFFFFC))),
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LAN91C96_DATA_HIGH);
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#else
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SMC_outsw(dev, LAN91C96_DATA_HIGH, buf, (length) >> 1);
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#endif /* USE_32_BIT */
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/* Send the last byte, if there is one. */
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if ((length & 1) == 0) {
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SMC_outw(dev, 0, LAN91C96_DATA_HIGH);
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} else {
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SMC_outw(dev, buf[length - 1] | 0x2000, LAN91C96_DATA_HIGH);
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}
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/* and let the chipset deal with it */
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SMC_outw(dev, LAN91C96_MMUCR_ENQUEUE, LAN91C96_MMU);
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/* poll for TX INT */
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if (poll4int (dev, LAN91C96_MSK_TX_INT, SMC_TX_TIMEOUT)) {
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/* sending failed */
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PRINTK2("%s: TX timeout, sending failed...\n", dev->name);
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/* release packet */
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SMC_outw(dev, LAN91C96_MMUCR_RELEASE_TX, LAN91C96_MMU);
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/* wait for MMU getting ready (low) */
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while (SMC_inw(dev, LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY)
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udelay (10);
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PRINTK2("MMU ready\n");
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return 0;
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} else {
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/* ack. int */
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SMC_outw(dev, LAN91C96_IST_TX_INT, LAN91C96_INT_STATS);
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PRINTK2("%s: Sent packet of length %d \n", dev->name, length);
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/* release packet */
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SMC_outw(dev, LAN91C96_MMUCR_RELEASE_TX, LAN91C96_MMU);
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/* wait for MMU getting ready (low) */
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while (SMC_inw(dev, LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY)
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udelay (10);
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PRINTK2 ("MMU ready\n");
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}
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return length;
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}
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/*
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* Open and Initialize the board
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*
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* Set up everything, reset the card, etc ..
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*
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*/
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static int smc_open(bd_t *bd, struct eth_device *dev)
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{
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int i, err; /* used to set hw ethernet address */
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PRINTK2("%s:smc_open\n", dev->name);
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/* reset the hardware */
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smc_reset(dev);
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smc_enable(dev);
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SMC_SELECT_BANK(dev, 1);
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/* set smc_mac_addr, and sync it with u-boot globals */
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err = smc_get_ethaddr(bd, dev);
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if (err < 0)
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return -1;
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#ifdef USE_32_BIT
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for (i = 0; i < 6; i += 2) {
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word address;
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address = smc_mac_addr[i + 1] << 8;
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address |= smc_mac_addr[i];
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SMC_outw(dev, address, LAN91C96_IA0 + i);
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}
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#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, 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;
|
|
}
|
|
|