![Michael Brown](/assets/img/avatar_default.png)
Suggested-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
966 lines
30 KiB
C
966 lines
30 KiB
C
/*
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* Etherboot - BOOTP/TFTP Bootstrap Program
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*
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* w89c840.c -- This file implements the winbond-840 driver for etherboot.
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*
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*/
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/*
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* Adapted by Igor V. Kovalenko
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* -- <garrison@mail.ru>
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* OR
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* -- <iko@crec.mipt.ru>
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* Initial adaptaion stage, including testing, completed 23 August 2000.
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*/
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/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2, or (at
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* 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, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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FILE_LICENCE ( GPL2_OR_LATER );
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/*
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* date version by what
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* Written: Aug 20 2000 V0.10 iko Initial revision.
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* changes: Aug 22 2000 V0.90 iko Works!
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* Aug 23 2000 V0.91 iko Cleanup, posted to etherboot
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* maintainer.
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* Aug 26 2000 V0.92 iko Fixed Rx ring handling.
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* First Linux Kernel (TM)
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* successfully loaded using
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* this driver.
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* Jan 07 2001 V0.93 iko Transmitter timeouts are handled
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* using timer2 routines. Proposed
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* by Ken Yap to eliminate CPU speed
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* dependency.
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* Dec 12 2003 V0.94 timlegge Fixed issues in 5.2, removed
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* interrupt usage, enabled
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* multicast support
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*
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* This is the etherboot driver for cards based on Winbond W89c840F chip.
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*
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* It was written from skeleton source, with Donald Becker's winbond-840.c
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* kernel driver as a guideline. Mostly the w89c840 related definitions
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* and the lower level routines have been cut-and-pasted into this source.
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*
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* Frankly speaking, about 90% of the code was obtained using cut'n'paste
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* sequence :) while the remainder appeared while brainstorming
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* Linux Kernel 2.4.0-testX source code. Thanks, Donald and Linus!
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*
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* There was a demand for using this card in a rather large
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* remote boot environment at MSKP OVTI Lab of
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* Moscow Institute for Physics and Technology (MIPT) -- http://www.mipt.ru/
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* so you may count that for motivation.
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*
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*/
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/*
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* If you want to see debugging output then define W89C840_DEBUG
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*/
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/*
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#define W89C840_DEBUG
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*/
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/*
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* Keep using IO_OPS for Etherboot driver!
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*/
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#define USE_IO_OPS
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#include "etherboot.h"
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#include "nic.h"
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#include <ipxe/pci.h>
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#include <ipxe/ethernet.h>
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static const char *w89c840_version = "driver Version 0.94 - December 12, 2003";
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/* Linux support functions */
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#define virt_to_le32desc(addr) virt_to_bus(addr)
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#define le32desc_to_virt(addr) bus_to_virt(addr)
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/*
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#define cpu_to_le32(val) (val)
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#define le32_to_cpu(val) (val)
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*/
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/* Operational parameters that are set at compile time. */
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/* Keep the ring sizes a power of two for compile efficiency.
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The compiler will convert <unsigned>'%'<2^N> into a bit mask.
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Making the Tx ring too large decreases the effectiveness of channel
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bonding and packet priority.
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There are no ill effects from too-large receive rings. */
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#define TX_RING_SIZE 2
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#define RX_RING_SIZE 2
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/* The presumed FIFO size for working around the Tx-FIFO-overflow bug.
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To avoid overflowing we don't queue again until we have room for a
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full-size packet.
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*/
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#define TX_FIFO_SIZE (2048)
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#define TX_BUG_FIFO_LIMIT (TX_FIFO_SIZE-1514-16)
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/* Operational parameters that usually are not changed. */
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/* Time in jiffies before concluding the transmitter is hung. */
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#define TX_TIMEOUT (10*1000)
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#define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/
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/*
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* Used to be this much CPU loops on Celeron@400 (?),
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* now using real timer and TX_TIMEOUT!
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* #define TX_LOOP_COUNT 10000000
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*/
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#if !defined(__OPTIMIZE__)
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#warning You must compile this file with the correct options!
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#warning See the last lines of the source file.
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#error You must compile this driver with "-O".
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#endif
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enum chip_capability_flags {CanHaveMII=1, HasBrokenTx=2};
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#ifdef USE_IO_OPS
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#define W840_FLAGS (PCI_USES_IO | PCI_ADDR0 | PCI_USES_MASTER)
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#else
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#define W840_FLAGS (PCI_USES_MEM | PCI_ADDR1 | PCI_USES_MASTER)
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#endif
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static u32 driver_flags = CanHaveMII | HasBrokenTx;
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/* This driver was written to use PCI memory space, however some x86 systems
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work only with I/O space accesses. Pass -DUSE_IO_OPS to use PCI I/O space
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accesses instead of memory space. */
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#ifdef USE_IO_OPS
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#undef readb
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#undef readw
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#undef readl
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#undef writeb
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#undef writew
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#undef writel
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#define readb inb
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#define readw inw
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#define readl inl
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#define writeb outb
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#define writew outw
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#define writel outl
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#endif
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/* Offsets to the Command and Status Registers, "CSRs".
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While similar to the Tulip, these registers are longword aligned.
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Note: It's not useful to define symbolic names for every register bit in
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the device. The name can only partially document the semantics and make
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the driver longer and more difficult to read.
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*/
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enum w840_offsets {
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PCIBusCfg=0x00, TxStartDemand=0x04, RxStartDemand=0x08,
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RxRingPtr=0x0C, TxRingPtr=0x10,
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IntrStatus=0x14, NetworkConfig=0x18, IntrEnable=0x1C,
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RxMissed=0x20, EECtrl=0x24, MIICtrl=0x24, BootRom=0x28, GPTimer=0x2C,
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CurRxDescAddr=0x30, CurRxBufAddr=0x34, /* Debug use */
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MulticastFilter0=0x38, MulticastFilter1=0x3C, StationAddr=0x40,
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CurTxDescAddr=0x4C, CurTxBufAddr=0x50,
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};
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/* Bits in the interrupt status/enable registers. */
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/* The bits in the Intr Status/Enable registers, mostly interrupt sources. */
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enum intr_status_bits {
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NormalIntr=0x10000, AbnormalIntr=0x8000,
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IntrPCIErr=0x2000, TimerInt=0x800,
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IntrRxDied=0x100, RxNoBuf=0x80, IntrRxDone=0x40,
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TxFIFOUnderflow=0x20, RxErrIntr=0x10,
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TxIdle=0x04, IntrTxStopped=0x02, IntrTxDone=0x01,
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};
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/* Bits in the NetworkConfig register. */
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enum rx_mode_bits {
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AcceptErr=0x80, AcceptRunt=0x40,
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AcceptBroadcast=0x20, AcceptMulticast=0x10,
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AcceptAllPhys=0x08, AcceptMyPhys=0x02,
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};
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enum mii_reg_bits {
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MDIO_ShiftClk=0x10000, MDIO_DataIn=0x80000, MDIO_DataOut=0x20000,
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MDIO_EnbOutput=0x40000, MDIO_EnbIn = 0x00000,
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};
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/* The Tulip Rx and Tx buffer descriptors. */
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struct w840_rx_desc {
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s32 status;
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s32 length;
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u32 buffer1;
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u32 next_desc;
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};
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struct w840_tx_desc {
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s32 status;
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s32 length;
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u32 buffer1, buffer2; /* We use only buffer 1. */
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};
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/* Bits in network_desc.status */
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enum desc_status_bits {
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DescOwn=0x80000000, DescEndRing=0x02000000, DescUseLink=0x01000000,
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DescWholePkt=0x60000000, DescStartPkt=0x20000000, DescEndPkt=0x40000000,
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DescIntr=0x80000000,
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};
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#define PRIV_ALIGN 15 /* Required alignment mask */
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#define PRIV_ALIGN_BYTES 32
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static struct winbond_private
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{
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/* Descriptor rings first for alignment. */
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struct w840_rx_desc rx_ring[RX_RING_SIZE];
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struct w840_tx_desc tx_ring[TX_RING_SIZE];
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struct net_device *next_module; /* Link for devices of this type. */
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void *priv_addr; /* Unaligned address for kfree */
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const char *product_name;
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/* Frequently used values: keep some adjacent for cache effect. */
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int chip_id, drv_flags;
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struct pci_dev *pci_dev;
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int csr6;
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struct w840_rx_desc *rx_head_desc;
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unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */
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unsigned int rx_buf_sz; /* Based on MTU+slack. */
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unsigned int cur_tx, dirty_tx;
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int tx_q_bytes;
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unsigned int tx_full:1; /* The Tx queue is full. */
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/* These values are keep track of the transceiver/media in use. */
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unsigned int full_duplex:1; /* Full-duplex operation requested. */
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unsigned int duplex_lock:1;
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unsigned int medialock:1; /* Do not sense media. */
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unsigned int default_port:4; /* Last dev->if_port value. */
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/* MII transceiver section. */
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int mii_cnt; /* MII device addresses. */
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u16 advertising; /* NWay media advertisement */
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unsigned char phys[2]; /* MII device addresses. */
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} w840private __attribute__ ((aligned (PRIV_ALIGN_BYTES)));
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/* NIC specific static variables go here */
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static int ioaddr;
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static unsigned short eeprom [0x40];
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struct {
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char rx_packet[PKT_BUF_SZ * RX_RING_SIZE];
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char tx_packet[PKT_BUF_SZ * TX_RING_SIZE];
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} w89c840_buf __shared;
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static int eeprom_read(long ioaddr, int location);
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static int mdio_read(int base_address, int phy_id, int location);
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#if 0
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static void mdio_write(int base_address, int phy_id, int location, int value);
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#endif
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static void check_duplex(void);
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static void set_rx_mode(void);
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static void init_ring(void);
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#if defined(W89C840_DEBUG)
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static void decode_interrupt(u32 intr_status)
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{
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printf("Interrupt status: ");
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#define TRACE_INTR(_intr_) \
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if (intr_status & (_intr_)) { printf (" " #_intr_); }
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TRACE_INTR(NormalIntr);
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TRACE_INTR(AbnormalIntr);
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TRACE_INTR(IntrPCIErr);
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TRACE_INTR(TimerInt);
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TRACE_INTR(IntrRxDied);
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TRACE_INTR(RxNoBuf);
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TRACE_INTR(IntrRxDone);
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TRACE_INTR(TxFIFOUnderflow);
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TRACE_INTR(RxErrIntr);
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TRACE_INTR(TxIdle);
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TRACE_INTR(IntrTxStopped);
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TRACE_INTR(IntrTxDone);
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printf("\n");
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/*sleep(1);*/
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}
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#endif
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/**************************************************************************
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w89c840_reset - Reset adapter
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***************************************************************************/
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static void w89c840_reset(struct nic *nic)
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{
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int i;
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/* Reset the chip to erase previous misconfiguration.
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No hold time required! */
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writel(0x00000001, ioaddr + PCIBusCfg);
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init_ring();
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writel(virt_to_bus(w840private.rx_ring), ioaddr + RxRingPtr);
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writel(virt_to_bus(w840private.tx_ring), ioaddr + TxRingPtr);
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for (i = 0; i < ETH_ALEN; i++)
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writeb(nic->node_addr[i], ioaddr + StationAddr + i);
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/* Initialize other registers. */
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/* Configure the PCI bus bursts and FIFO thresholds.
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486: Set 8 longword cache alignment, 8 longword burst.
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586: Set 16 longword cache alignment, no burst limit.
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Cache alignment bits 15:14 Burst length 13:8
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0000 <not allowed> 0000 align to cache 0800 8 longwords
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4000 8 longwords 0100 1 longword 1000 16 longwords
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8000 16 longwords 0200 2 longwords 2000 32 longwords
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C000 32 longwords 0400 4 longwords
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Wait the specified 50 PCI cycles after a reset by initializing
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Tx and Rx queues and the address filter list. */
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writel(0xE010, ioaddr + PCIBusCfg);
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writel(0, ioaddr + RxStartDemand);
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w840private.csr6 = 0x20022002;
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check_duplex();
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set_rx_mode();
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/* Do not enable the interrupts Etherboot doesn't need them */
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/*
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writel(0x1A0F5, ioaddr + IntrStatus);
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writel(0x1A0F5, ioaddr + IntrEnable);
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*/
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#if defined(W89C840_DEBUG)
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printf("winbond-840 : Done reset.\n");
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#endif
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}
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#if 0
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static void handle_intr(u32 intr_stat)
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{
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if ((intr_stat & (NormalIntr|AbnormalIntr)) == 0) {
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/* we are polling, do not return now */
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/*return 0;*/
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} else {
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/* Acknowledge all of the current interrupt sources ASAP. */
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writel(intr_stat & 0x001ffff, ioaddr + IntrStatus);
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}
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if (intr_stat & AbnormalIntr) {
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/* There was an abnormal interrupt */
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printf("\n-=- Abnormal interrupt.\n");
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#if defined(W89C840_DEBUG)
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decode_interrupt(intr_stat);
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#endif
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if (intr_stat & RxNoBuf) {
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/* There was an interrupt */
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printf("-=- <=> No receive buffers available.\n");
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writel(0, ioaddr + RxStartDemand);
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}
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}
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}
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#endif
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/**************************************************************************
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w89c840_poll - Wait for a frame
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***************************************************************************/
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static int w89c840_poll(struct nic *nic, int retrieve)
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{
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/* return true if there's an ethernet packet ready to read */
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/* nic->packet should contain data on return */
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/* nic->packetlen should contain length of data */
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int packet_received = 0;
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#if defined(W89C840_DEBUG)
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u32 intr_status = readl(ioaddr + IntrStatus);
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#endif
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do {
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/* Code from netdev_rx(dev) */
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int entry = w840private.cur_rx % RX_RING_SIZE;
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struct w840_rx_desc *desc = w840private.rx_head_desc;
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s32 status = desc->status;
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if (status & DescOwn) {
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/* DescOwn bit is still set, we should wait for RX to complete */
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packet_received = 0;
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break;
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}
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if ( !retrieve ) {
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packet_received = 1;
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break;
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}
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if ((status & 0x38008300) != 0x0300) {
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if ((status & 0x38000300) != 0x0300) {
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/* Ingore earlier buffers. */
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if ((status & 0xffff) != 0x7fff) {
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printf("winbond-840 : Oversized Ethernet frame spanned "
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"multiple buffers, entry %d status %X !\n",
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w840private.cur_rx, (unsigned int) status);
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}
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} else if (status & 0x8000) {
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/* There was a fatal error. */
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#if defined(W89C840_DEBUG)
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printf("winbond-840 : Receive error, Rx status %X :", status);
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if (status & 0x0890) {
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printf(" RXLEN_ERROR");
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}
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if (status & 0x004C) {
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printf(", FRAME_ERROR");
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}
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if (status & 0x0002) {
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printf(", CRC_ERROR");
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}
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printf("\n");
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#endif
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/* Simpy do a reset now... */
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w89c840_reset(nic);
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packet_received = 0;
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break;
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}
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} else {
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/* Omit the four octet CRC from the length. */
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int pkt_len = ((status >> 16) & 0x7ff) - 4;
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#if defined(W89C840_DEBUG)
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printf(" netdev_rx() normal Rx pkt ring %d length %d status %X\n", entry, pkt_len, status);
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#endif
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nic->packetlen = pkt_len;
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/* Check if the packet is long enough to accept without copying
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to a minimally-sized skbuff. */
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memcpy(nic->packet, le32desc_to_virt(w840private.rx_ring[entry].buffer1), pkt_len);
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packet_received = 1;
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/* Release buffer to NIC */
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w840private.rx_ring[entry].status = DescOwn;
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#if defined(W89C840_DEBUG)
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/* You will want this info for the initial debug. */
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printf(" Rx data %hhX:%hhX:%hhX:%hhX:%hhX:"
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"%hhX %hhX:%hhX:%hhX:%hhX:%hhX:%hhX %hhX%hhX "
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"%hhX.%hhX.%hhX.%hhX.\n",
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nic->packet[0], nic->packet[1], nic->packet[2], nic->packet[3],
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nic->packet[4], nic->packet[5], nic->packet[6], nic->packet[7],
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nic->packet[8], nic->packet[9], nic->packet[10],
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nic->packet[11], nic->packet[12], nic->packet[13],
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nic->packet[14], nic->packet[15], nic->packet[16],
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nic->packet[17]);
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#endif
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}
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entry = (++w840private.cur_rx) % RX_RING_SIZE;
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w840private.rx_head_desc = &w840private.rx_ring[entry];
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} while (0);
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return packet_received;
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}
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/**************************************************************************
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w89c840_transmit - Transmit a frame
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***************************************************************************/
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static void w89c840_transmit(
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struct nic *nic,
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const char *d, /* Destination */
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unsigned int t, /* Type */
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unsigned int s, /* size */
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const char *p) /* Packet */
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{
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/* send the packet to destination */
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unsigned entry;
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int transmit_status;
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unsigned long ct;
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/* Caution: the write order is important here, set the field
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with the "ownership" bits last. */
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|
|
/* Fill in our transmit buffer */
|
|
entry = w840private.cur_tx % TX_RING_SIZE;
|
|
|
|
memcpy (w89c840_buf.tx_packet, d, ETH_ALEN); /* dst */
|
|
memcpy (w89c840_buf.tx_packet + ETH_ALEN, nic->node_addr, ETH_ALEN);/*src*/
|
|
|
|
*((char *) w89c840_buf.tx_packet + 12) = t >> 8; /* type */
|
|
*((char *) w89c840_buf.tx_packet + 13) = t;
|
|
|
|
memcpy (w89c840_buf.tx_packet + ETH_HLEN, p, s);
|
|
s += ETH_HLEN;
|
|
|
|
while (s < ETH_ZLEN)
|
|
*((char *) w89c840_buf.tx_packet + ETH_HLEN + (s++)) = 0;
|
|
|
|
w840private.tx_ring[entry].buffer1
|
|
= virt_to_le32desc(w89c840_buf.tx_packet);
|
|
|
|
w840private.tx_ring[entry].length = (DescWholePkt | (u32) s);
|
|
if (entry >= TX_RING_SIZE-1) /* Wrap ring */
|
|
w840private.tx_ring[entry].length |= (DescIntr | DescEndRing);
|
|
w840private.tx_ring[entry].status = (DescOwn);
|
|
w840private.cur_tx++;
|
|
|
|
w840private.tx_q_bytes = (u16) s;
|
|
writel(0, ioaddr + TxStartDemand);
|
|
|
|
/* Work around horrible bug in the chip by marking the queue as full
|
|
when we do not have FIFO room for a maximum sized packet. */
|
|
|
|
if ((w840private.drv_flags & HasBrokenTx) && w840private.tx_q_bytes > TX_BUG_FIFO_LIMIT) {
|
|
/* Actually this is left to help finding error tails later in debugging...
|
|
* See Linux kernel driver in winbond-840.c for details.
|
|
*/
|
|
w840private.tx_full = 1;
|
|
}
|
|
|
|
#if defined(W89C840_DEBUG)
|
|
printf("winbond-840 : Transmit frame # %d size %d queued in slot %d.\n", w840private.cur_tx, s, entry);
|
|
#endif
|
|
|
|
/* Now wait for TX to complete. */
|
|
transmit_status = w840private.tx_ring[entry].status;
|
|
|
|
ct = currticks();
|
|
{
|
|
#if defined W89C840_DEBUG
|
|
u32 intr_stat = 0;
|
|
#endif
|
|
while (1) {
|
|
|
|
#if defined(W89C840_DEBUG)
|
|
decode_interrupt(intr_stat);
|
|
#endif
|
|
|
|
while ( (transmit_status & DescOwn) && ct + TX_TIMEOUT < currticks()) {
|
|
|
|
transmit_status = w840private.tx_ring[entry].status;
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
if ((transmit_status & DescOwn) == 0) {
|
|
|
|
#if defined(W89C840_DEBUG)
|
|
printf("winbond-840 : transmission complete after wait loop iterations, status %X\n",
|
|
w840private.tx_ring[entry].status);
|
|
#endif
|
|
|
|
return;
|
|
}
|
|
|
|
/* Transmit timed out... */
|
|
|
|
printf("winbond-840 : transmission TIMEOUT : status %X\n",
|
|
(unsigned int) w840private.tx_ring[entry].status);
|
|
|
|
return;
|
|
}
|
|
|
|
/**************************************************************************
|
|
w89c840_disable - Turn off ethernet interface
|
|
***************************************************************************/
|
|
static void w89c840_disable ( struct nic *nic ) {
|
|
|
|
w89c840_reset(nic);
|
|
|
|
/* Don't know what to do to disable the board. Is this needed at all? */
|
|
/* Yes, a live NIC can corrupt the loaded memory later [Ken] */
|
|
/* Stop the chip's Tx and Rx processes. */
|
|
writel(w840private.csr6 &= ~0x20FA, ioaddr + NetworkConfig);
|
|
}
|
|
|
|
/**************************************************************************
|
|
w89c840_irq - Enable, Disable, or Force interrupts
|
|
***************************************************************************/
|
|
static void w89c840_irq(struct nic *nic __unused, irq_action_t action __unused)
|
|
{
|
|
switch ( action ) {
|
|
case DISABLE :
|
|
break;
|
|
case ENABLE :
|
|
break;
|
|
case FORCE :
|
|
break;
|
|
}
|
|
}
|
|
|
|
static struct nic_operations w89c840_operations = {
|
|
.connect = dummy_connect,
|
|
.poll = w89c840_poll,
|
|
.transmit = w89c840_transmit,
|
|
.irq = w89c840_irq,
|
|
|
|
};
|
|
|
|
static struct pci_device_id w89c840_nics[] = {
|
|
PCI_ROM(0x1050, 0x0840, "winbond840", "Winbond W89C840F", 0),
|
|
PCI_ROM(0x11f6, 0x2011, "compexrl100atx", "Compex RL100ATX", 0),
|
|
};
|
|
|
|
PCI_DRIVER ( w89c840_driver, w89c840_nics, PCI_NO_CLASS );
|
|
|
|
/**************************************************************************
|
|
w89c840_probe - Look for an adapter, this routine's visible to the outside
|
|
***************************************************************************/
|
|
static int w89c840_probe ( struct nic *nic, struct pci_device *p ) {
|
|
|
|
|
|
u16 sum = 0;
|
|
int i;
|
|
unsigned short value;
|
|
|
|
if (p->ioaddr == 0)
|
|
return 0;
|
|
|
|
nic->ioaddr = p->ioaddr;
|
|
nic->irqno = 0;
|
|
|
|
#if defined(W89C840_DEBUG)
|
|
printf("winbond-840: PCI bus %hhX device function %hhX: I/O address: %hX\n", p->bus, p->devfn, ioaddr);
|
|
#endif
|
|
|
|
ioaddr = ioaddr & ~3; /* Mask the bit that says "this is an io addr" */
|
|
|
|
#define PCI_DEVICE_ID_WINBOND2_89C840 0x0840
|
|
#define PCI_DEVICE_ID_COMPEX_RL100ATX 0x2011
|
|
|
|
/* From Matt Hortman <mbhortman@acpthinclient.com> */
|
|
if (p->vendor == PCI_VENDOR_ID_WINBOND2
|
|
&& p->device == PCI_DEVICE_ID_WINBOND2_89C840) {
|
|
|
|
/* detected "Winbond W89c840 Fast Ethernet PCI NIC" */
|
|
|
|
} else if ( p->vendor == PCI_VENDOR_ID_COMPEX
|
|
&& p->device == PCI_DEVICE_ID_COMPEX_RL100ATX) {
|
|
|
|
/* detected "Compex RL100ATX Fast Ethernet PCI NIC" */
|
|
|
|
} else {
|
|
/* Gee, guess what? They missed again. */
|
|
printf("device ID : %X - is not a Compex RL100ATX NIC.\n",
|
|
p->device);
|
|
return 0;
|
|
}
|
|
|
|
printf(" %s\n", w89c840_version);
|
|
|
|
adjust_pci_device(p);
|
|
|
|
/* Ok. Got one. Read the eeprom. */
|
|
for (i = 0; i < 0x40; i++) {
|
|
value = eeprom_read(ioaddr, i);
|
|
eeprom[i] = value;
|
|
sum += value;
|
|
}
|
|
|
|
for (i=0;i<ETH_ALEN;i++) {
|
|
nic->node_addr[i] = (eeprom[i/2] >> (8*(i&1))) & 0xff;
|
|
}
|
|
|
|
DBG ( "Ethernet addr: %s\n", eth_ntoa ( nic->node_addr ) );
|
|
|
|
#if defined(W89C840_DEBUG)
|
|
printf("winbond-840: EEPROM checksum %hX, got eeprom", sum);
|
|
#endif
|
|
|
|
/* Reset the chip to erase previous misconfiguration.
|
|
No hold time required! */
|
|
writel(0x00000001, ioaddr + PCIBusCfg);
|
|
|
|
if (driver_flags & CanHaveMII) {
|
|
int phy, phy_idx = 0;
|
|
for (phy = 1; phy < 32 && phy_idx < 4; phy++) {
|
|
int mii_status = mdio_read(ioaddr, phy, 1);
|
|
if (mii_status != 0xffff && mii_status != 0x0000) {
|
|
w840private.phys[phy_idx++] = phy;
|
|
w840private.advertising = mdio_read(ioaddr, phy, 4);
|
|
|
|
#if defined(W89C840_DEBUG)
|
|
printf("winbond-840 : MII PHY found at address %d, status "
|
|
"%X advertising %hX.\n", phy, mii_status, w840private.advertising);
|
|
#endif
|
|
|
|
}
|
|
}
|
|
|
|
w840private.mii_cnt = phy_idx;
|
|
|
|
if (phy_idx == 0) {
|
|
printf("winbond-840 : MII PHY not found -- this device may not operate correctly.\n");
|
|
}
|
|
}
|
|
|
|
/* point to NIC specific routines */
|
|
nic->nic_op = &w89c840_operations;
|
|
|
|
w89c840_reset(nic);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Read the EEPROM and MII Management Data I/O (MDIO) interfaces. These are
|
|
often serial bit streams generated by the host processor.
|
|
The example below is for the common 93c46 EEPROM, 64 16 bit words. */
|
|
|
|
/* Delay between EEPROM clock transitions.
|
|
No extra delay is needed with 33Mhz PCI, but future 66Mhz access may need
|
|
a delay. Note that pre-2.0.34 kernels had a cache-alignment bug that
|
|
made udelay() unreliable.
|
|
The old method of using an ISA access as a delay, __SLOW_DOWN_IO__, is
|
|
depricated.
|
|
*/
|
|
#define eeprom_delay(ee_addr) readl(ee_addr)
|
|
|
|
enum EEPROM_Ctrl_Bits {
|
|
EE_ShiftClk=0x02, EE_Write0=0x801, EE_Write1=0x805,
|
|
EE_ChipSelect=0x801, EE_DataIn=0x08,
|
|
};
|
|
|
|
/* The EEPROM commands include the alway-set leading bit. */
|
|
enum EEPROM_Cmds {
|
|
EE_WriteCmd=(5 << 6), EE_ReadCmd=(6 << 6), EE_EraseCmd=(7 << 6),
|
|
};
|
|
|
|
static int eeprom_read(long addr, int location)
|
|
{
|
|
int i;
|
|
int retval = 0;
|
|
int ee_addr = addr + EECtrl;
|
|
int read_cmd = location | EE_ReadCmd;
|
|
writel(EE_ChipSelect, ee_addr);
|
|
|
|
/* Shift the read command bits out. */
|
|
for (i = 10; i >= 0; i--) {
|
|
short dataval = (read_cmd & (1 << i)) ? EE_Write1 : EE_Write0;
|
|
writel(dataval, ee_addr);
|
|
eeprom_delay(ee_addr);
|
|
writel(dataval | EE_ShiftClk, ee_addr);
|
|
eeprom_delay(ee_addr);
|
|
}
|
|
writel(EE_ChipSelect, ee_addr);
|
|
|
|
for (i = 16; i > 0; i--) {
|
|
writel(EE_ChipSelect | EE_ShiftClk, ee_addr);
|
|
eeprom_delay(ee_addr);
|
|
retval = (retval << 1) | ((readl(ee_addr) & EE_DataIn) ? 1 : 0);
|
|
writel(EE_ChipSelect, ee_addr);
|
|
eeprom_delay(ee_addr);
|
|
}
|
|
|
|
/* Terminate the EEPROM access. */
|
|
writel(0, ee_addr);
|
|
return retval;
|
|
}
|
|
|
|
/* MII transceiver control section.
|
|
Read and write the MII registers using software-generated serial
|
|
MDIO protocol. See the MII specifications or DP83840A data sheet
|
|
for details.
|
|
|
|
The maximum data clock rate is 2.5 Mhz. The minimum timing is usually
|
|
met by back-to-back 33Mhz PCI cycles. */
|
|
#define mdio_delay(mdio_addr) readl(mdio_addr)
|
|
|
|
/* Set iff a MII transceiver on any interface requires mdio preamble.
|
|
This only set with older tranceivers, so the extra
|
|
code size of a per-interface flag is not worthwhile. */
|
|
static char mii_preamble_required = 1;
|
|
|
|
#define MDIO_WRITE0 (MDIO_EnbOutput)
|
|
#define MDIO_WRITE1 (MDIO_DataOut | MDIO_EnbOutput)
|
|
|
|
/* Generate the preamble required for initial synchronization and
|
|
a few older transceivers. */
|
|
static void mdio_sync(long mdio_addr)
|
|
{
|
|
int bits = 32;
|
|
|
|
/* Establish sync by sending at least 32 logic ones. */
|
|
while (--bits >= 0) {
|
|
writel(MDIO_WRITE1, mdio_addr);
|
|
mdio_delay(mdio_addr);
|
|
writel(MDIO_WRITE1 | MDIO_ShiftClk, mdio_addr);
|
|
mdio_delay(mdio_addr);
|
|
}
|
|
}
|
|
|
|
static int mdio_read(int base_address, int phy_id, int location)
|
|
{
|
|
long mdio_addr = base_address + MIICtrl;
|
|
int mii_cmd = (0xf6 << 10) | (phy_id << 5) | location;
|
|
int i, retval = 0;
|
|
|
|
if (mii_preamble_required)
|
|
mdio_sync(mdio_addr);
|
|
|
|
/* Shift the read command bits out. */
|
|
for (i = 15; i >= 0; i--) {
|
|
int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
|
|
|
|
writel(dataval, mdio_addr);
|
|
mdio_delay(mdio_addr);
|
|
writel(dataval | MDIO_ShiftClk, mdio_addr);
|
|
mdio_delay(mdio_addr);
|
|
}
|
|
/* Read the two transition, 16 data, and wire-idle bits. */
|
|
for (i = 20; i > 0; i--) {
|
|
writel(MDIO_EnbIn, mdio_addr);
|
|
mdio_delay(mdio_addr);
|
|
retval = (retval << 1) | ((readl(mdio_addr) & MDIO_DataIn) ? 1 : 0);
|
|
writel(MDIO_EnbIn | MDIO_ShiftClk, mdio_addr);
|
|
mdio_delay(mdio_addr);
|
|
}
|
|
return (retval>>1) & 0xffff;
|
|
}
|
|
|
|
#if 0
|
|
static void mdio_write(int base_address, int phy_id, int location, int value)
|
|
{
|
|
long mdio_addr = base_address + MIICtrl;
|
|
int mii_cmd = (0x5002 << 16) | (phy_id << 23) | (location<<18) | value;
|
|
int i;
|
|
|
|
if (location == 4 && phy_id == w840private.phys[0])
|
|
w840private.advertising = value;
|
|
|
|
if (mii_preamble_required)
|
|
mdio_sync(mdio_addr);
|
|
|
|
/* Shift the command bits out. */
|
|
for (i = 31; i >= 0; i--) {
|
|
int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
|
|
|
|
writel(dataval, mdio_addr);
|
|
mdio_delay(mdio_addr);
|
|
writel(dataval | MDIO_ShiftClk, mdio_addr);
|
|
mdio_delay(mdio_addr);
|
|
}
|
|
/* Clear out extra bits. */
|
|
for (i = 2; i > 0; i--) {
|
|
writel(MDIO_EnbIn, mdio_addr);
|
|
mdio_delay(mdio_addr);
|
|
writel(MDIO_EnbIn | MDIO_ShiftClk, mdio_addr);
|
|
mdio_delay(mdio_addr);
|
|
}
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
static void check_duplex(void)
|
|
{
|
|
int mii_reg5 = mdio_read(ioaddr, w840private.phys[0], 5);
|
|
int negotiated = mii_reg5 & w840private.advertising;
|
|
int duplex;
|
|
|
|
if (w840private.duplex_lock || mii_reg5 == 0xffff)
|
|
return;
|
|
|
|
duplex = (negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040;
|
|
if (w840private.full_duplex != duplex) {
|
|
w840private.full_duplex = duplex;
|
|
|
|
#if defined(W89C840_DEBUG)
|
|
printf("winbond-840 : Setting %s-duplex based on MII # %d negotiated capability %X\n",
|
|
duplex ? "full" : "half", w840private.phys[0], negotiated);
|
|
#endif
|
|
|
|
w840private.csr6 &= ~0x200;
|
|
w840private.csr6 |= duplex ? 0x200 : 0;
|
|
}
|
|
}
|
|
|
|
static void set_rx_mode(void)
|
|
{
|
|
u32 mc_filter[2]; /* Multicast hash filter */
|
|
u32 rx_mode;
|
|
|
|
/* Accept all multicasts from now on. */
|
|
memset(mc_filter, 0xff, sizeof(mc_filter));
|
|
|
|
/*
|
|
* works OK with multicast enabled.
|
|
*/
|
|
|
|
rx_mode = AcceptBroadcast | AcceptMyPhys | AcceptMulticast;
|
|
|
|
writel(mc_filter[0], ioaddr + MulticastFilter0);
|
|
writel(mc_filter[1], ioaddr + MulticastFilter1);
|
|
w840private.csr6 &= ~0x00F8;
|
|
w840private.csr6 |= rx_mode;
|
|
writel(w840private.csr6, ioaddr + NetworkConfig);
|
|
|
|
#if defined(W89C840_DEBUG)
|
|
printf("winbond-840 : Done setting RX mode.\n");
|
|
#endif
|
|
}
|
|
|
|
/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
|
|
static void init_ring(void)
|
|
{
|
|
int i;
|
|
char * p;
|
|
|
|
w840private.tx_full = 0;
|
|
w840private.tx_q_bytes = w840private.cur_rx = w840private.cur_tx = 0;
|
|
w840private.dirty_rx = w840private.dirty_tx = 0;
|
|
|
|
w840private.rx_buf_sz = PKT_BUF_SZ;
|
|
w840private.rx_head_desc = &w840private.rx_ring[0];
|
|
|
|
/* Initial all Rx descriptors. Fill in the Rx buffers. */
|
|
|
|
p = &w89c840_buf.rx_packet[0];
|
|
|
|
for (i = 0; i < RX_RING_SIZE; i++) {
|
|
w840private.rx_ring[i].length = w840private.rx_buf_sz;
|
|
w840private.rx_ring[i].status = 0;
|
|
w840private.rx_ring[i].next_desc = virt_to_le32desc(&w840private.rx_ring[i+1]);
|
|
|
|
w840private.rx_ring[i].buffer1 = virt_to_le32desc(p + (PKT_BUF_SZ * i));
|
|
w840private.rx_ring[i].status = DescOwn | DescIntr;
|
|
}
|
|
|
|
/* Mark the last entry as wrapping the ring. */
|
|
w840private.rx_ring[i-1].length |= DescEndRing;
|
|
w840private.rx_ring[i-1].next_desc = virt_to_le32desc(&w840private.rx_ring[0]);
|
|
|
|
w840private.dirty_rx = (unsigned int)(i - RX_RING_SIZE);
|
|
|
|
for (i = 0; i < TX_RING_SIZE; i++) {
|
|
w840private.tx_ring[i].status = 0;
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
DRIVER ( "W89C840F", nic_driver, pci_driver, w89c840_driver,
|
|
w89c840_probe, w89c840_disable );
|
|
|
|
/*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* c-indent-level: 8
|
|
* tab-width: 8
|
|
* End:
|
|
*/
|