mirror of
https://git.FreeBSD.org/src.git
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ca2190f252
close PR #13757, however I'm waiting on user feedback before declaring the PR officially closed. Among other things, this improves UDP transmit performance, and tx underruns are now detected and the TX start threshold adjusted accordingly.
593 lines
18 KiB
C
593 lines
18 KiB
C
/*
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* Copyright (c) 1997, 1998
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* Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Bill Paul.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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struct tl_type {
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u_int16_t tl_vid;
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u_int16_t tl_did;
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char *tl_name;
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};
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/*
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* ThunderLAN TX/RX list format. The TX and RX lists are pretty much
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* identical: the list begins with a 32-bit forward pointer which points
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* at the next list in the chain, followed by 16 bits for the total
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* frame size, and a 16 bit status field. This is followed by a series
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* of 10 32-bit data count/data address pairs that point to the fragments
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* that make up the complete frame.
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*/
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#define TL_MAXFRAGS 10
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#define TL_RX_LIST_CNT 64
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#define TL_TX_LIST_CNT 128
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#define TL_MIN_FRAMELEN 64
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struct tl_frag {
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u_int32_t tlist_dcnt;
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u_int32_t tlist_dadr;
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};
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struct tl_list {
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u_int32_t tlist_fptr; /* phys address of next list */
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u_int16_t tlist_cstat; /* status word */
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u_int16_t tlist_frsize; /* size of data in frame */
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struct tl_frag tl_frag[TL_MAXFRAGS];
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};
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/*
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* This is a special case of an RX list. By setting the One_Frag
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* bit in the NETCONFIG register, the driver can force the ThunderLAN
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* chip to use only one fragment when DMAing RX frames.
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*/
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struct tl_list_onefrag {
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u_int32_t tlist_fptr;
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u_int16_t tlist_cstat;
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u_int16_t tlist_frsize;
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struct tl_frag tl_frag;
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};
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struct tl_list_data {
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struct tl_list_onefrag tl_rx_list[TL_RX_LIST_CNT];
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struct tl_list tl_tx_list[TL_TX_LIST_CNT];
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unsigned char tl_pad[TL_MIN_FRAMELEN];
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};
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struct tl_chain {
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struct tl_list *tl_ptr;
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struct mbuf *tl_mbuf;
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struct tl_chain *tl_next;
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};
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struct tl_chain_onefrag {
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struct tl_list_onefrag *tl_ptr;
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struct mbuf *tl_mbuf;
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struct tl_chain_onefrag *tl_next;
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};
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struct tl_chain_data {
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struct tl_chain_onefrag tl_rx_chain[TL_RX_LIST_CNT];
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struct tl_chain tl_tx_chain[TL_TX_LIST_CNT];
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struct tl_chain_onefrag *tl_rx_head;
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struct tl_chain_onefrag *tl_rx_tail;
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struct tl_chain *tl_tx_head;
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struct tl_chain *tl_tx_tail;
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struct tl_chain *tl_tx_free;
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};
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struct tl_softc {
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struct arpcom arpcom; /* interface info */
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struct ifmedia ifmedia; /* media info */
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bus_space_handle_t tl_bhandle;
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bus_space_tag_t tl_btag;
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void *tl_intrhand;
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struct resource *tl_irq;
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struct resource *tl_res;
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device_t tl_miibus;
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struct tl_type *tl_dinfo; /* ThunderLAN adapter info */
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u_int8_t tl_unit; /* interface number */
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u_int8_t tl_eeaddr;
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struct tl_list_data *tl_ldata; /* TX/RX lists and mbufs */
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struct tl_chain_data tl_cdata;
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u_int8_t tl_txeoc;
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u_int8_t tl_bitrate;
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int tl_if_flags;
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struct callout_handle tl_stat_ch;
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};
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/*
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* Transmit interrupt threshold.
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*/
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#define TX_THR 0x00000004
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/*
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* General constants that are fun to know.
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*
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* The ThunderLAN controller is made by Texas Instruments. The
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* manual indicates that if the EEPROM checksum fails, the PCI
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* vendor and device ID registers will be loaded with TI-specific
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* values.
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*/
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#define TI_VENDORID 0x104C
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#define TI_DEVICEID_THUNDERLAN 0x0500
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/*
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* These are the PCI vendor and device IDs for Compaq ethernet
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* adapters based on the ThunderLAN controller.
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*/
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#define COMPAQ_VENDORID 0x0E11
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#define COMPAQ_DEVICEID_NETEL_10_100 0xAE32
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#define COMPAQ_DEVICEID_NETEL_UNKNOWN 0xAE33
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#define COMPAQ_DEVICEID_NETEL_10 0xAE34
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#define COMPAQ_DEVICEID_NETFLEX_3P_INTEGRATED 0xAE35
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#define COMPAQ_DEVICEID_NETEL_10_100_DUAL 0xAE40
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#define COMPAQ_DEVICEID_NETEL_10_100_PROLIANT 0xAE43
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#define COMPAQ_DEVICEID_NETEL_10_100_EMBEDDED 0xB011
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#define COMPAQ_DEVICEID_NETEL_10_T2_UTP_COAX 0xB012
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#define COMPAQ_DEVICEID_NETEL_10_100_TX_UTP 0xB030
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#define COMPAQ_DEVICEID_NETFLEX_3P 0xF130
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#define COMPAQ_DEVICEID_NETFLEX_3P_BNC 0xF150
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/*
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* These are the PCI vendor and device IDs for Olicom
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* adapters based on the ThunderLAN controller.
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*/
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#define OLICOM_VENDORID 0x108D
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#define OLICOM_DEVICEID_OC2183 0x0013
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#define OLICOM_DEVICEID_OC2325 0x0012
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#define OLICOM_DEVICEID_OC2326 0x0014
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/*
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* PCI low memory base and low I/O base
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*/
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#define TL_PCI_LOIO 0x10
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#define TL_PCI_LOMEM 0x14
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/*
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* PCI latency timer (it's actually 0x0D, but we want a value
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* that's longword aligned).
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*/
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#define TL_PCI_LATENCY_TIMER 0x0C
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#define TL_DIO_ADDR_INC 0x8000 /* Increment addr on each read */
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#define TL_DIO_RAM_SEL 0x4000 /* RAM address select */
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#define TL_DIO_ADDR_MASK 0x3FFF /* address bits mask */
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/*
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* Interrupt types
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*/
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#define TL_INTR_INVALID 0x0
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#define TL_INTR_TXEOF 0x1
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#define TL_INTR_STATOFLOW 0x2
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#define TL_INTR_RXEOF 0x3
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#define TL_INTR_DUMMY 0x4
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#define TL_INTR_TXEOC 0x5
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#define TL_INTR_ADCHK 0x6
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#define TL_INTR_RXEOC 0x7
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#define TL_INT_MASK 0x001C
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#define TL_VEC_MASK 0x1FE0
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/*
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* Host command register bits
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*/
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#define TL_CMD_GO 0x80000000
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#define TL_CMD_STOP 0x40000000
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#define TL_CMD_ACK 0x20000000
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#define TL_CMD_CHSEL7 0x10000000
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#define TL_CMD_CHSEL6 0x08000000
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#define TL_CMD_CHSEL5 0x04000000
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#define TL_CMD_CHSEL4 0x02000000
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#define TL_CMD_CHSEL3 0x01000000
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#define TL_CMD_CHSEL2 0x00800000
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#define TL_CMD_CHSEL1 0x00400000
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#define TL_CMD_CHSEL0 0x00200000
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#define TL_CMD_EOC 0x00100000
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#define TL_CMD_RT 0x00080000
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#define TL_CMD_NES 0x00040000
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#define TL_CMD_ZERO0 0x00020000
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#define TL_CMD_ZERO1 0x00010000
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#define TL_CMD_ADRST 0x00008000
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#define TL_CMD_LDTMR 0x00004000
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#define TL_CMD_LDTHR 0x00002000
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#define TL_CMD_REQINT 0x00001000
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#define TL_CMD_INTSOFF 0x00000800
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#define TL_CMD_INTSON 0x00000400
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#define TL_CMD_RSVD0 0x00000200
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#define TL_CMD_RSVD1 0x00000100
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#define TL_CMD_ACK7 0x00000080
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#define TL_CMD_ACK6 0x00000040
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#define TL_CMD_ACK5 0x00000020
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#define TL_CMD_ACK4 0x00000010
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#define TL_CMD_ACK3 0x00000008
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#define TL_CMD_ACK2 0x00000004
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#define TL_CMD_ACK1 0x00000002
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#define TL_CMD_ACK0 0x00000001
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#define TL_CMD_CHSEL_MASK 0x01FE0000
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#define TL_CMD_ACK_MASK 0xFF
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/*
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* EEPROM address where station address resides.
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*/
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#define TL_EEPROM_EADDR 0x83
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#define TL_EEPROM_EADDR2 0x99
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#define TL_EEPROM_EADDR3 0xAF
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#define TL_EEPROM_EADDR_OC 0xF8 /* Olicom cards use a different
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address than Compaqs. */
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/*
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* ThunderLAN host command register offsets.
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* (Can be accessed either by IO ports or memory map.)
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*/
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#define TL_HOSTCMD 0x00
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#define TL_CH_PARM 0x04
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#define TL_DIO_ADDR 0x08
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#define TL_HOST_INT 0x0A
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#define TL_DIO_DATA 0x0C
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/*
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* ThunderLAN internal registers
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*/
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#define TL_NETCMD 0x00
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#define TL_NETSIO 0x01
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#define TL_NETSTS 0x02
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#define TL_NETMASK 0x03
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#define TL_NETCONFIG 0x04
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#define TL_MANTEST 0x06
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#define TL_VENID_LSB 0x08
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#define TL_VENID_MSB 0x09
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#define TL_DEVID_LSB 0x0A
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#define TL_DEVID_MSB 0x0B
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#define TL_REVISION 0x0C
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#define TL_SUBCLASS 0x0D
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#define TL_MINLAT 0x0E
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#define TL_MAXLAT 0x0F
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#define TL_AREG0_B5 0x10
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#define TL_AREG0_B4 0x11
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#define TL_AREG0_B3 0x12
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#define TL_AREG0_B2 0x13
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#define TL_AREG0_B1 0x14
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#define TL_AREG0_B0 0x15
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#define TL_AREG1_B5 0x16
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#define TL_AREG1_B4 0x17
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#define TL_AREG1_B3 0x18
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#define TL_AREG1_B2 0x19
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#define TL_AREG1_B1 0x1A
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#define TL_AREG1_B0 0x1B
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#define TL_AREG2_B5 0x1C
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#define TL_AREG2_B4 0x1D
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#define TL_AREG2_B3 0x1E
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#define TL_AREG2_B2 0x1F
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#define TL_AREG2_B1 0x20
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#define TL_AREG2_B0 0x21
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#define TL_AREG3_B5 0x22
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#define TL_AREG3_B4 0x23
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#define TL_AREG3_B3 0x24
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#define TL_AREG3_B2 0x25
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#define TL_AREG3_B1 0x26
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#define TL_AREG3_B0 0x27
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#define TL_HASH1 0x28
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#define TL_HASH2 0x2C
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#define TL_TXGOODFRAMES 0x30
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#define TL_TXUNDERRUN 0x33
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#define TL_RXGOODFRAMES 0x34
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#define TL_RXOVERRUN 0x37
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#define TL_DEFEREDTX 0x38
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#define TL_CRCERROR 0x3A
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#define TL_CODEERROR 0x3B
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#define TL_MULTICOLTX 0x3C
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#define TL_SINGLECOLTX 0x3E
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#define TL_EXCESSIVECOL 0x40
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#define TL_LATECOL 0x41
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#define TL_CARRIERLOSS 0x42
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#define TL_ACOMMIT 0x43
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#define TL_LDREG 0x44
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#define TL_BSIZEREG 0x45
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#define TL_MAXRX 0x46
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/*
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* ThunderLAN SIO register bits
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*/
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#define TL_SIO_MINTEN 0x80
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#define TL_SIO_ECLOK 0x40
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#define TL_SIO_ETXEN 0x20
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#define TL_SIO_EDATA 0x10
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#define TL_SIO_NMRST 0x08
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#define TL_SIO_MCLK 0x04
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#define TL_SIO_MTXEN 0x02
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#define TL_SIO_MDATA 0x01
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/*
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* Thunderlan NETCONFIG bits
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*/
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#define TL_CFG_RCLKTEST 0x8000
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#define TL_CFG_TCLKTEST 0x4000
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#define TL_CFG_BITRATE 0x2000
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#define TL_CFG_RXCRC 0x1000
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#define TL_CFG_PEF 0x0800
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#define TL_CFG_ONEFRAG 0x0400
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#define TL_CFG_ONECHAN 0x0200
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#define TL_CFG_MTEST 0x0100
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#define TL_CFG_PHYEN 0x0080
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#define TL_CFG_MACSEL6 0x0040
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#define TL_CFG_MACSEL5 0x0020
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#define TL_CFG_MACSEL4 0x0010
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#define TL_CFG_MACSEL3 0x0008
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#define TL_CFG_MACSEL2 0x0004
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#define TL_CFG_MACSEL1 0x0002
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#define TL_CFG_MACSEL0 0x0001
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/*
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* ThunderLAN NETSTS bits
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*/
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#define TL_STS_MIRQ 0x80
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#define TL_STS_HBEAT 0x40
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#define TL_STS_TXSTOP 0x20
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#define TL_STS_RXSTOP 0x10
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/*
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* ThunderLAN NETCMD bits
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*/
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#define TL_CMD_NRESET 0x80
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#define TL_CMD_NWRAP 0x40
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#define TL_CMD_CSF 0x20
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#define TL_CMD_CAF 0x10
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#define TL_CMD_NOBRX 0x08
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#define TL_CMD_DUPLEX 0x04
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#define TL_CMD_TRFRAM 0x02
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#define TL_CMD_TXPACE 0x01
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/*
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* ThunderLAN NETMASK bits
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*/
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#define TL_MASK_MASK7 0x80
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#define TL_MASK_MASK6 0x40
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#define TL_MASK_MASK5 0x20
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#define TL_MASK_MASK4 0x10
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/*
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* MII frame format
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*/
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#ifdef ANSI_DOESNT_ALLOW_BITFIELDS
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struct tl_mii_frame {
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u_int16_t mii_stdelim:2,
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mii_opcode:2,
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mii_phyaddr:5,
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mii_regaddr:5,
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mii_turnaround:2;
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u_int16_t mii_data;
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};
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#else
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struct tl_mii_frame {
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u_int8_t mii_stdelim;
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u_int8_t mii_opcode;
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u_int8_t mii_phyaddr;
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u_int8_t mii_regaddr;
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u_int8_t mii_turnaround;
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u_int16_t mii_data;
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};
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#endif
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/*
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* MII constants
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*/
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#define TL_MII_STARTDELIM 0x01
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#define TL_MII_READOP 0x02
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#define TL_MII_WRITEOP 0x01
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#define TL_MII_TURNAROUND 0x02
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#define TL_LAST_FRAG 0x80000000
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#define TL_CSTAT_UNUSED 0x8000
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#define TL_CSTAT_FRAMECMP 0x4000
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#define TL_CSTAT_READY 0x3000
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#define TL_CSTAT_UNUSED13 0x2000
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#define TL_CSTAT_UNUSED12 0x1000
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#define TL_CSTAT_EOC 0x0800
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#define TL_CSTAT_RXERROR 0x0400
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#define TL_CSTAT_PASSCRC 0x0200
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#define TL_CSTAT_DPRIO 0x0100
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#define TL_FRAME_MASK 0x00FFFFFF
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#define tl_tx_goodframes(x) (x.tl_txstat & TL_FRAME_MASK)
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#define tl_tx_underrun(x) ((x.tl_txstat & ~TL_FRAME_MASK) >> 24)
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#define tl_rx_goodframes(x) (x.tl_rxstat & TL_FRAME_MASK)
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#define tl_rx_overrun(x) ((x.tl_rxstat & ~TL_FRAME_MASK) >> 24)
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struct tl_stats {
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u_int32_t tl_txstat;
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u_int32_t tl_rxstat;
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u_int16_t tl_deferred;
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u_int8_t tl_crc_errors;
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u_int8_t tl_code_errors;
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u_int16_t tl_tx_multi_collision;
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u_int16_t tl_tx_single_collision;
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u_int8_t tl_excessive_collision;
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u_int8_t tl_late_collision;
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u_int8_t tl_carrier_loss;
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u_int8_t acommit;
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};
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/*
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* ACOMMIT register bits. These are used only when a bitrate
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* PHY is selected ('bitrate' bit in netconfig register is set).
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*/
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#define TL_AC_MTXER 0x01 /* reserved */
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#define TL_AC_MTXD1 0x02 /* 0 == 10baseT 1 == AUI */
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#define TL_AC_MTXD2 0x04 /* loopback disable */
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#define TL_AC_MTXD3 0x08 /* full duplex disable */
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#define TL_AC_TXTHRESH 0xF0
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#define TL_AC_TXTHRESH_16LONG 0x00
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#define TL_AC_TXTHRESH_32LONG 0x10
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#define TL_AC_TXTHRESH_64LONG 0x20
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#define TL_AC_TXTHRESH_128LONG 0x30
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#define TL_AC_TXTHRESH_256LONG 0x40
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|
#define TL_AC_TXTHRESH_WHOLEPKT 0x50
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|
|
|
/*
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|
* PCI burst size register (TL_BSIZEREG).
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|
*/
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|
#define TL_RXBURST 0x0F
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#define TL_TXBURST 0xF0
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|
|
|
#define TL_RXBURST_4LONG 0x00
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|
#define TL_RXBURST_8LONG 0x01
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#define TL_RXBURST_16LONG 0x02
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#define TL_RXBURST_32LONG 0x03
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|
#define TL_RXBURST_64LONG 0x04
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#define TL_RXBURST_128LONG 0x05
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|
|
|
#define TL_TXBURST_4LONG 0x00
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#define TL_TXBURST_8LONG 0x10
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#define TL_TXBURST_16LONG 0x20
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|
#define TL_TXBURST_32LONG 0x30
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#define TL_TXBURST_64LONG 0x40
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|
#define TL_TXBURST_128LONG 0x50
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|
|
|
/*
|
|
* register space access macros
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|
*/
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|
#define CSR_WRITE_4(sc, reg, val) \
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bus_space_write_4(sc->tl_btag, sc->tl_bhandle, reg, val)
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|
#define CSR_WRITE_2(sc, reg, val) \
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|
bus_space_write_2(sc->tl_btag, sc->tl_bhandle, reg, val)
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#define CSR_WRITE_1(sc, reg, val) \
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bus_space_write_1(sc->tl_btag, sc->tl_bhandle, reg, val)
|
|
|
|
#define CSR_READ_4(sc, reg) \
|
|
bus_space_read_4(sc->tl_btag, sc->tl_bhandle, reg)
|
|
#define CSR_READ_2(sc, reg) \
|
|
bus_space_read_2(sc->tl_btag, sc->tl_bhandle, reg)
|
|
#define CSR_READ_1(sc, reg) \
|
|
bus_space_read_1(sc->tl_btag, sc->tl_bhandle, reg)
|
|
|
|
#define CMD_PUT(sc, x) CSR_WRITE_4(sc, TL_HOSTCMD, x)
|
|
#define CMD_SET(sc, x) \
|
|
CSR_WRITE_4(sc, TL_HOSTCMD, CSR_READ_4(sc, TL_HOSTCMD) | (x))
|
|
#define CMD_CLR(sc, x) \
|
|
CSR_WRITE_4(sc, TL_HOSTCMD, CSR_READ_4(sc, TL_HOSTCMD) & ~(x))
|
|
|
|
/*
|
|
* ThunderLAN adapters typically have a serial EEPROM containing
|
|
* configuration information. The main reason we're interested in
|
|
* it is because it also contains the adapters's station address.
|
|
*
|
|
* Access to the EEPROM is a bit goofy since it is a serial device:
|
|
* you have to do reads and writes one bit at a time. The state of
|
|
* the DATA bit can only change while the CLOCK line is held low.
|
|
* Transactions work basically like this:
|
|
*
|
|
* 1) Send the EEPROM_START sequence to prepare the EEPROM for
|
|
* accepting commands. This pulls the clock high, sets
|
|
* the data bit to 0, enables transmission to the EEPROM,
|
|
* pulls the data bit up to 1, then pulls the clock low.
|
|
* The idea is to do a 0 to 1 transition of the data bit
|
|
* while the clock pin is held high.
|
|
*
|
|
* 2) To write a bit to the EEPROM, set the TXENABLE bit, then
|
|
* set the EDATA bit to send a 1 or clear it to send a 0.
|
|
* Finally, set and then clear ECLOK. Strobing the clock
|
|
* transmits the bit. After 8 bits have been written, the
|
|
* EEPROM should respond with an ACK, which should be read.
|
|
*
|
|
* 3) To read a bit from the EEPROM, clear the TXENABLE bit,
|
|
* then set ECLOK. The bit can then be read by reading EDATA.
|
|
* ECLOCK should then be cleared again. This can be repeated
|
|
* 8 times to read a whole byte, after which the
|
|
*
|
|
* 4) We need to send the address byte to the EEPROM. For this
|
|
* we have to send the write control byte to the EEPROM to
|
|
* tell it to accept data. The byte is 0xA0. The EEPROM should
|
|
* ack this. The address byte can be send after that.
|
|
*
|
|
* 5) Now we have to tell the EEPROM to send us data. For that we
|
|
* have to transmit the read control byte, which is 0xA1. This
|
|
* byte should also be acked. We can then read the data bits
|
|
* from the EEPROM.
|
|
*
|
|
* 6) When we're all finished, send the EEPROM_STOP sequence.
|
|
*
|
|
* Note that we use the ThunderLAN's NetSio register to access the
|
|
* EEPROM, however there is an alternate method. There is a PCI NVRAM
|
|
* register at PCI offset 0xB4 which can also be used with minor changes.
|
|
* The difference is that access to PCI registers via pci_conf_read()
|
|
* and pci_conf_write() is done using programmed I/O, which we want to
|
|
* avoid.
|
|
*/
|
|
|
|
/*
|
|
* Note that EEPROM_START leaves transmission enabled.
|
|
*/
|
|
#define EEPROM_START \
|
|
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_ECLOK); /* Pull clock pin high */\
|
|
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_EDATA); /* Set DATA bit to 1 */ \
|
|
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_ETXEN); /* Enable xmit to write bit */\
|
|
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_EDATA); /* Pull DATA bit to 0 again */\
|
|
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_ECLOK); /* Pull clock low again */
|
|
|
|
/*
|
|
* EEPROM_STOP ends access to the EEPROM and clears the ETXEN bit so
|
|
* that no further data can be written to the EEPROM I/O pin.
|
|
*/
|
|
#define EEPROM_STOP \
|
|
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_ETXEN); /* Disable xmit */ \
|
|
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_EDATA); /* Pull DATA to 0 */ \
|
|
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_ECLOK); /* Pull clock high */ \
|
|
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_ETXEN); /* Enable xmit */ \
|
|
tl_dio_setbit(sc, TL_NETSIO, TL_SIO_EDATA); /* Toggle DATA to 1 */ \
|
|
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_ETXEN); /* Disable xmit. */ \
|
|
tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_ECLOK); /* Pull clock low again */
|
|
|
|
|
|
/*
|
|
* Microchip Technology 24Cxx EEPROM control bytes
|
|
*/
|
|
#define EEPROM_CTL_READ 0xA1 /* 0101 0001 */
|
|
#define EEPROM_CTL_WRITE 0xA0 /* 0101 0000 */
|
|
|
|
#ifdef __alpha__
|
|
#undef vtophys
|
|
#define vtophys(va) alpha_XXX_dmamap((vm_offset_t)va)
|
|
#endif
|