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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522 lines
13 KiB
522 lines
13 KiB
/*------------------------------------------------------------------------
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. 3c589.c
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. This is a driver for 3Com's 3C589 (Etherlink III) PCMCIA Ethernet device.
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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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. 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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----------------------------------------------------------------------------*/
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#include <common.h>
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#include <command.h>
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#include <net.h>
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#ifdef CONFIG_DRIVER_3C589
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#include "3c589.h"
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/* Use power-down feature of the chip */
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#define POWER_DOWN 0
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#define NO_AUTOPROBE
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static const char version[] =
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"Your ad here! :P\n";
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#undef EL_DEBUG
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typedef unsigned char byte;
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typedef unsigned short word;
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typedef unsigned long int dword;
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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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/*
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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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#if (EL_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 EL_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 EL_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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#define outb(args...) mmio_outb(args)
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#define mmio_outb(value, addr) (*((volatile byte *)(addr)) = value)
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#define inb(args...) mmio_inb(args)
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#define mmio_inb(addr) (*((volatile byte *)(addr)))
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#define outw(args...) mmio_outw(args)
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#define mmio_outw(value, addr) (*((volatile word *)(addr)) = value)
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#define inw(args...) mmio_inw(args)
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#define mmio_inw(addr) (*((volatile word *)(addr)))
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#define outsw(args...) mmio_outsw(args)
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#define mmio_outsw(r,b,l) ({ int __i; \
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word *__b2; \
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__b2 = (word *) b; \
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for (__i = 0; __i < l; __i++) { \
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mmio_outw( *(__b2 + __i), r); \
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} \
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})
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#define insw(args...) mmio_insw(args)
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#define mmio_insw(r,b,l) ({ int __i ; \
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word *__b2; \
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__b2 = (word *) b; \
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for (__i = 0; __i < l; __i++) { \
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*(__b2 + __i) = mmio_inw(r); \
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mmio_inw(0); \
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}; \
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})
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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 3Com 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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#define EL_BASE_ADDR 0x20000000
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/* Offsets from base I/O address. */
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#define EL3_DATA 0x00
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#define EL3_TIMER 0x0a
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#define EL3_CMD 0x0e
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#define EL3_STATUS 0x0e
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#define EEPROM_READ 0x0080
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#define EL3WINDOW(win_num) mmio_outw(SelectWindow + (win_num), EL_BASE_ADDR + EL3_CMD)
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/* The top five bits written to EL3_CMD are a command, the lower
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11 bits are the parameter, if applicable. */
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enum c509cmd {
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TotalReset = 0<<11, SelectWindow = 1<<11, StartCoax = 2<<11,
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RxDisable = 3<<11, RxEnable = 4<<11, RxReset = 5<<11, RxDiscard = 8<<11,
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TxEnable = 9<<11, TxDisable = 10<<11, TxReset = 11<<11,
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FakeIntr = 12<<11, AckIntr = 13<<11, SetIntrEnb = 14<<11,
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SetStatusEnb = 15<<11, SetRxFilter = 16<<11, SetRxThreshold = 17<<11,
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SetTxThreshold = 18<<11, SetTxStart = 19<<11, StatsEnable = 21<<11,
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StatsDisable = 22<<11, StopCoax = 23<<11,
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};
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enum c509status {
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IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004,
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TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
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IntReq = 0x0040, StatsFull = 0x0080, CmdBusy = 0x1000
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};
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/* The SetRxFilter command accepts the following classes: */
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enum RxFilter {
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RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8
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};
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/* Register window 1 offsets, the window used in normal operation. */
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#define TX_FIFO 0x00
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#define RX_FIFO 0x00
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#define RX_STATUS 0x08
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#define TX_STATUS 0x0B
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#define TX_FREE 0x0C /* Remaining free bytes in Tx buffer. */
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/*
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Read a word from the EEPROM using the regular EEPROM access register.
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Assume that we are in register window zero.
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*/
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static word read_eeprom(dword ioaddr, int index)
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{
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int i;
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outw(EEPROM_READ + index, ioaddr + 0xa);
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/* Reading the eeprom takes 162 us */
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for (i = 1620; i >= 0; i--)
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if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
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break;
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return inw(ioaddr + 0xc);
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}
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static void el_get_mac_addr( unsigned char *mac_addr )
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{
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int i;
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union
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{
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word w;
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unsigned char b[2];
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} wrd;
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unsigned char old_window = inw( EL_BASE_ADDR + EL3_STATUS ) >> 13;
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GO_WINDOW(0);
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VX_BUSY_WAIT;
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for (i = 0; i < 3; i++)
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{
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wrd.w = read_eeprom(EL_BASE_ADDR, 0xa+i);
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#ifdef __BIG_ENDIAN
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mac_addr[2*i] = wrd.b[0];
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mac_addr[2*i+1] = wrd.b[1];
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#else
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mac_addr[2*i] = wrd.b[1];
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mac_addr[2*i+1] = wrd.b[0];
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#endif
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}
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GO_WINDOW(old_window);
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VX_BUSY_WAIT;
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}
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#if EL_DEBUG > 1
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static void print_packet( byte * buf, int length )
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{
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int i;
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int remainder;
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int lines;
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PRINTK2("Packet of length %d \n", length );
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lines = length / 16;
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remainder = length % 16;
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for ( i = 0; i < lines ; i ++ ) {
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int cur;
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for ( cur = 0; cur < 8; cur ++ ) {
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byte a, b;
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a = *(buf ++ );
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b = *(buf ++ );
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PRINTK2("%02x%02x ", a, b );
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}
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PRINTK2("\n");
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}
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for ( i = 0; i < remainder/2 ; i++ ) {
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byte a, b;
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a = *(buf ++ );
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b = *(buf ++ );
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PRINTK2("%02x%02x ", a, b );
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}
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PRINTK2("\n");
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}
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#endif /* EL_DEBUG > 1 */
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/**************************************************************************
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ETH_RESET - Reset adapter
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***************************************************************************/
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static void el_reset(bd_t *bd)
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{
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/***********************************************************
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Reset 3Com 595 card
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*************************************************************/
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/* QUICK HACK
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* - adjust timing for 3c589
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* - enable io for PCMCIA */
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outw(0x0004, 0xa0000018);
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udelay(100);
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outw(0x0041, 0x28010000);
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udelay(100);
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/* issue global reset */
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outw(GLOBAL_RESET, BASE + VX_COMMAND);
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/* must wait for at least 1ms */
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udelay(100000000);
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/* set mac addr */
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{
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unsigned char *mac_addr = bd->bi_enetaddr;
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int i;
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el_get_mac_addr( mac_addr );
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GO_WINDOW(2);
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VX_BUSY_WAIT;
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printf("3C589 MAC Addr.: ");
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for (i = 0; i < 6; i++)
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{
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printf("%02x", mac_addr[i]);
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outb(mac_addr[i], BASE + VX_W2_ADDR_0 + i);
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VX_BUSY_WAIT;
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}
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printf("\n\n");
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}
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/* set RX filter */
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outw(SET_RX_FILTER | FIL_INDIVIDUAL | FIL_BRDCST, BASE + VX_COMMAND);
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VX_BUSY_WAIT;
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/* set irq mask and read_zero */
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outw(SET_RD_0_MASK | S_CARD_FAILURE | S_RX_COMPLETE |
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S_TX_COMPLETE | S_TX_AVAIL, BASE + VX_COMMAND);
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VX_BUSY_WAIT;
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outw(SET_INTR_MASK | S_CARD_FAILURE | S_RX_COMPLETE |
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S_TX_COMPLETE | S_TX_AVAIL, BASE + VX_COMMAND);
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VX_BUSY_WAIT;
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/* enable TP Linkbeat */
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GO_WINDOW(4);
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VX_BUSY_WAIT;
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outw( ENABLE_UTP, BASE + VX_W4_MEDIA_TYPE);
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VX_BUSY_WAIT;
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/*
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* Attempt to get rid of any stray interrupts that occured during
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* configuration. On the i386 this isn't possible because one may
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* already be queued. However, a single stray interrupt is
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* unimportant.
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*/
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outw(ACK_INTR | 0xff, BASE + VX_COMMAND);
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VX_BUSY_WAIT;
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/* enable TX and RX */
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outw( RX_ENABLE, BASE + VX_COMMAND );
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VX_BUSY_WAIT;
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outw( TX_ENABLE, BASE + VX_COMMAND );
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VX_BUSY_WAIT;
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/* print the diag. regs. */
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PRINTK2("Diag. Regs\n");
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PRINTK2("--> MEDIA_TYPE: %04x\n", inw(BASE + VX_W4_MEDIA_TYPE));
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PRINTK2("--> NET_DIAG: %04x\n", inw(BASE + VX_W4_NET_DIAG));
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PRINTK2("--> FIFO_DIAG: %04x\n", inw(BASE + VX_W4_FIFO_DIAG));
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PRINTK2("--> CTRLR_STATUS: %04x\n", inw(BASE + VX_W4_CTRLR_STATUS));
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PRINTK2("\n\n");
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/* enter working mode */
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GO_WINDOW(1);
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VX_BUSY_WAIT;
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/* wait for another 1ms */
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udelay(100000000);
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}
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/*-----------------------------------------------------------------
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.
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. The driver can be entered at any of the following entry points.
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.
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.------------------------------------------------------------------ */
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extern int eth_init(bd_t *bd);
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extern void eth_halt(void);
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extern int eth_rx(void);
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extern int eth_send(volatile void *packet, int length);
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/*
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------------------------------------------------------------
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.
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. Internal routines
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.
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------------------------------------------------------------
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*/
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int eth_init(bd_t *bd)
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{
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el_reset(bd);
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return 0;
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}
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void eth_halt() {
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return;
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}
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#define EDEBUG 1
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/**************************************************************************
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ETH_POLL - Wait for a frame
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***************************************************************************/
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int eth_rx()
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{
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word status, rx_status, packet_size;
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VX_BUSY_WAIT;
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status = inw( BASE + VX_STATUS );
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if ( (status & S_RX_COMPLETE) == 0 ) return 0; /* nothing to do */
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/* Packet waiting -> check RX_STATUS */
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rx_status = inw( BASE + VX_W1_RX_STATUS );
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if ( rx_status & ERR_RX )
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{
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/* error in packet -> discard */
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PRINTK("[ERROR] Invalid packet -> discarding\n");
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PRINTK("-- error code 0x%02x\n", rx_status & ERR_MASK);
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PRINTK("-- rx bytes 0x%04d\n", rx_status & ((1<<11) - 1));
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PRINTK("[ERROR] Invalid packet -> discarding\n");
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outw( RX_DISCARD_TOP_PACK, BASE + VX_COMMAND );
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return 0;
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}
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/* correct pack. waiting in fifo */
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packet_size = rx_status & RX_BYTES_MASK;
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PRINTK("Correct packet waiting in fifo, size: %d\n", packet_size);
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{
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volatile word *packet_start = (word *)(BASE + VX_W1_RX_PIO_RD_1);
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word *RcvBuffer = (word *)(NetRxPackets[0]);
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int wcount = 0;
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for (wcount = 0; wcount < (packet_size >> 1); wcount++)
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{
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*RcvBuffer++ = *(packet_start);
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}
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/* handle odd packets */
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if ( packet_size & 1 )
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{
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*RcvBuffer++ = *(packet_start);
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}
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}
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/* fifo should now be empty (besides the padding bytes) */
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if ( ((*((word *)(BASE + VX_W1_RX_STATUS))) & RX_BYTES_MASK) > 3 )
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{
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PRINTK("[ERROR] Fifo not empty after packet read (remaining pkts: %d)\n",
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(((*(word *)(BASE + VX_W1_RX_STATUS))) & RX_BYTES_MASK));
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}
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/* discard packet */
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*((word *)(BASE + VX_COMMAND)) = RX_DISCARD_TOP_PACK;
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/* Pass Packets to upper Layer */
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NetReceive(NetRxPackets[0], packet_size);
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return packet_size;
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}
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/**************************************************************************
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ETH_TRANSMIT - Transmit a frame
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***************************************************************************/
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static char padmap[] = {
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0, 3, 2, 1};
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int eth_send(volatile void *packet, int length) {
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int pad;
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int status;
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volatile word *buf = (word *)packet;
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int dummy = 0;
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/* padding stuff */
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pad = padmap[length & 3];
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PRINTK("eth_send(), length: %d\n", length);
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/* drop acknowledgements */
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while(( status=inb(EL_BASE_ADDR + VX_W1_TX_STATUS) )& TXS_COMPLETE ) {
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if(status & (TXS_UNDERRUN|TXS_MAX_COLLISION|TXS_STATUS_OVERFLOW)) {
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outw(TX_RESET, EL_BASE_ADDR + VX_COMMAND);
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outw(TX_ENABLE, EL_BASE_ADDR + VX_COMMAND);
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PRINTK("Bad status, resetting and reenabling transmitter\n");
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}
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outb(0x0, EL_BASE_ADDR + VX_W1_TX_STATUS);
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}
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while (inw(EL_BASE_ADDR + VX_W1_FREE_TX) < length + pad + 4) {
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/* no room in FIFO */
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if (dummy == 0)
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{
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PRINTK("No room in FIFO, waiting...\n");
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dummy++;
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}
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}
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PRINTK(" ---> FIFO ready\n");
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outw(length, EL_BASE_ADDR + VX_W1_TX_PIO_WR_1);
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/* Second dword meaningless */
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outw(0x0, EL_BASE_ADDR + VX_W1_TX_PIO_WR_1);
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#if EL_DEBUG > 1
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print_packet((byte *)buf, length);
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#endif
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/* write packet */
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{
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unsigned int i, totw;
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totw = ((length + 1) >> 1);
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PRINTK("Buffer: (totw = %d)\n", totw);
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for (i = 0; i < totw; i++) {
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outw( *(buf+i), EL_BASE_ADDR + VX_W1_TX_PIO_WR_1);
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udelay(10);
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}
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if(totw & 1)
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{ /* pad to double word length */
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outw( 0, EL_BASE_ADDR + VX_W1_TX_PIO_WR_1);
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udelay(10);
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}
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PRINTK("\n\n");
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}
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/* wait for Tx complete */
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PRINTK("Waiting for Tx to complete...\n");
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while(((status = inw(EL_BASE_ADDR + VX_STATUS)) & S_COMMAND_IN_PROGRESS) != 0)
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{
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udelay(10);
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}
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PRINTK(" ---> Tx completed, status = 0x%04x\n", status);
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return length;
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}
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#endif /* CONFIG_DRIVER_3C589 */
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