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NetBSD/sys/arch/sandpoint/stand/netboot/nvt.c
nisimura ad5b6b45cd - add brdsetup.c left uncomitted over half month. 
- fixes on tlp.c; more cautious about TCH/TER/RCH/RER usage and
avoid self-pointing TER.
- stylize structs and #define order to highlight similarities and
differences.
2008-05-30 14:54:16 +00:00

423 lines
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/* $NetBSD: nvt.c,v 1.15 2008/05/30 14:54:16 nisimura Exp $ */
/*-
* Copyright (c) 2007 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Tohru Nishimura.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/param.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <lib/libsa/stand.h>
#include <lib/libsa/net.h>
#include "globals.h"
/*
* - reverse endian access every CSR.
* - no vtophys() translation, vaddr_t == paddr_t.
* - PIPT writeback cache aware.
*/
#define CSR_WRITE_1(l, r, v) *(volatile uint8_t *)((l)->csr+(r)) = (v)
#define CSR_READ_1(l, r) *(volatile uint8_t *)((l)->csr+(r))
#define CSR_WRITE_2(l, r, v) out16rb((l)->csr+(r), (v))
#define CSR_READ_2(l, r) in16rb((l)->csr+(r))
#define CSR_WRITE_4(l, r, v) out32rb((l)->csr+(r), (v))
#define CSR_READ_4(l, r) in32rb((l)->csr+(r))
#define VTOPHYS(va) (uint32_t)(va)
#define DEVTOV(pa) (uint32_t)(pa)
#define wbinv(adr, siz) _wbinv(VTOPHYS(adr), (uint32_t)(siz))
#define inv(adr, siz) _inv(VTOPHYS(adr), (uint32_t)(siz))
#define DELAY(n) delay(n)
#define ALLOC(T,A) (T *)((unsigned)alloc(sizeof(T) + (A)) &~ ((A) - 1))
int nvt_match(unsigned, void *);
void *nvt_init(unsigned, void *);
int nvt_send(void *, char *, unsigned);
int nvt_recv(void *, char *, unsigned, unsigned);
struct desc {
uint32_t xd0, xd1, xd2, xd3;
};
#define T0_OWN (1U << 31) /* 1: loaded for HW to send */
#define T0_TERR (1U << 15) /* Tx error; ABT|CBH */
#define T0_UDF (1U << 11) /* FIFO underflow */
#define T0_CRS (1U << 10) /* found carrier sense lost */
#define T0_OWC (1U << 9) /* found out of window collision */
#define T0_ABT (1U << 8) /* excess collision Tx abort */
#define T0_CBH (1U << 7) /* heartbeat check failure */
#define T0_COLS (1U << 4) /* collision detected */
#define T0_NCRMASK 0x3 /* number of collision retries */
#define T1_IC (1U << 23) /* post Tx done interrupt */
#define T1_STP (1U << 22) /* first frame segment */
#define T1_EDP (1U << 21) /* last frame segment */
#define T1_CRC (1U << 16) /* _disable_ CRC generation */
#define T1_CHN (1U << 15) /* "more bit," not the last seg. */
#define T_FLMASK 0x00007fff /* Tx frame/segment length */
#define R0_OWN (1U << 31) /* 1: empty for HW to load anew */
#define R0_FLMASK 0x7fff0000 /* frame length */
#define R0_RXOK (1U << 15)
#define R0_MAR (1U << 13) /* multicast frame */
#define R0_BAR (1U << 12) /* broadcast frame */
#define R0_PHY (1U << 11) /* unicast frame */
#define R0_CHN (1U << 10) /* "more bit," not the last seg. */
#define R0_STP (1U << 9) /* first frame segment */
#define R0_EDP (1U << 8) /* last frame segment */
#define R0_BUFF (1U << 7) /* segment chain was broken */
#define R0_RUNT (1U << 5) /* runt frame received */
#define R0_LONG (1U << 4) /* frame too long */
#define R0_FOV (1U << 3) /* Rx FIFO overflow */
#define R0_FAE (1U << 2) /* frame alignment error */
#define R0_CRCE (1U << 1) /* CRC error */
#define R0_RERR (1U << 0) /* Rx error summary */
#define R1_FLMASK 0x00007ffc /* Rx segment buffer length */
#define VR_PAR0 0x00 /* SA [0] */
#define VR_PAR1 0x01 /* SA [1] */
#define VR_PAR2 0x02 /* SA [2] */
#define VR_PAR3 0x03 /* SA [3] */
#define VR_PAR4 0x04 /* SA [4] */
#define VR_PAR5 0x05 /* SA [5] */
#define VR_RCR 0x06 /* Rx control */
#define RCR_PROM (1U << 4) /* accept any frame */
#define RCR_AB (1U << 3) /* accept broadcast frame */
#define RCR_AM (1U << 2) /* use multicast filter */
#define VR_TCR 0x07 /* Tx control */
#define VR_CTL0 0x08 /* control #0 */
#define CTL0_RDMD (1U << 6) /* instruct Rx descriptor poll */
#define CTL0_TDMD (1U << 5) /* instruct Tx descriptor poll */
#define CTL0_TXON (1U << 4) /* enable Tx DMA */
#define CTL0_RXON (1U << 3) /* enable Rx DMA */
#define CTL0_STOP (1U << 2) /* activate stop processing */
#define CTL0_START (1U << 1) /* start and activate */
#define VR_CTL1 0x09 /* control #1 */
#define CTL1_RESET (1U << 7) /* SW reset, self-clearing */
#define CTL1_DPOLL (1U << 3) /* _disable_ Tx auto polling */
#define CTL1_FDX (1U << 2) /* set full duplex */
#define VR_ISR 0x0c /* interrupt status */
#define VR_IEN 0x0e /* interrupt enable */
#define VR_RDBA 0x18 /* Rx descriptor list base */
#define VR_TDBA 0x1c /* Tx descriptor list base */
#define VR_MIICFG 0x6c /* 4:0 PHY number */
#define VR_MIISR 0x6d /* MII status */
#define VR_MIICR 0x70 /* MII control */
#define MIICR_MAUTO (1U << 7) /* activate autopoll mode */
#define MIICR_RCMD (1U << 6) /* MII read operation */
#define MIICR_WCMD (1U << 5) /* MII write operation */
#define VR_MIIADR 0x71 /* MII indirect */
#define MIIADR_MIDLE (1U << 7) /* not in auto polling */
#define VR_MIIDATA 0x72 /* MII read/write */
#define VR_RXC 0x7e /* Rx feature control */
#define VR_TXC 0x7f /* Tx feature control */
#define VR_MCR0 0x80 /* misc control #0 */
#define MCR0_RFDXFLC (1U << 3) /* FCR1? */
#define MCR0_HDXFLC (1U << 2) /* FCR2? */
#define VR_MCR1 0x81 /* misc control #1 */
#define FRAMESIZE 1536
struct local {
struct desc txd;
struct desc rxd[2];
uint8_t rxstore[2][FRAMESIZE];
unsigned csr, rx;
unsigned phy, bmsr, anlpar;
unsigned ctl0;
};
static void mii_autopoll(struct local *);
static void mii_stoppoll(struct local *);
static int mii_read(struct local *, int, int);
static void mii_write(struct local *, int, int, int);
static void mii_dealan(struct local *, unsigned);
int
nvt_match(unsigned tag, void *data)
{
unsigned v;
v = pcicfgread(tag, PCI_ID_REG);
switch (v) {
case PCI_DEVICE(0x1106, 0x3053):
case PCI_DEVICE(0x1106, 0x3065):
return 1;
}
return 0;
}
void *
nvt_init(unsigned tag, void *data)
{
unsigned val, fdx;
struct local *l;
struct desc *txd, *rxd;
uint8_t *en;
val = pcicfgread(tag, PCI_ID_REG);
if (PCI_DEVICE(0x1106, 0x3053) != val
&& PCI_DEVICE(0x1106, 0x3065) != val)
return NULL;
l = ALLOC(struct local, sizeof(struct desc)); /* desc alignment */
memset(l, 0, sizeof(struct local));
l->csr = DEVTOV(pcicfgread(tag, 0x14)); /* use mem space */
val = CTL1_RESET;
CSR_WRITE_1(l, VR_CTL1, val);
do {
val = CSR_READ_1(l, VR_CTL1);
} while (val & CTL1_RESET);
l->phy = CSR_READ_1(l, VR_MIICFG) & 0x1f;
en = data;
en[0] = CSR_READ_1(l, VR_PAR0);
en[1] = CSR_READ_1(l, VR_PAR1);
en[2] = CSR_READ_1(l, VR_PAR2);
en[3] = CSR_READ_1(l, VR_PAR3);
en[4] = CSR_READ_1(l, VR_PAR4);
en[5] = CSR_READ_1(l, VR_PAR5);
printf("MAC address %02x:%02x:%02x:%02x:%02x:%02x\n",
en[0], en[1], en[2], en[3], en[4], en[5]);
printf("PHY %d (%04x.%04x)\n", l->phy,
mii_read(l, l->phy, 2), mii_read(l, l->phy, 3));
mii_dealan(l, 5);
/* speed and duplexity can be seen in MII 20 */
val = mii_read(l, l->phy, 20);
fdx = !!(val & (1U << 0));
printf("%s", (val & (1U << 1)) ? "100Mbps" : "10Mbps");
if (fdx)
printf("-FDX");
printf("\n");
txd = &l->txd;
rxd = &l->rxd[0];
rxd[0].xd0 = htole32(R0_OWN);
rxd[0].xd1 = htole32(FRAMESIZE << 16);
rxd[0].xd2 = htole32(VTOPHYS(l->rxstore[0]));
rxd[0].xd3 = htole32(VTOPHYS(&rxd[1]));
rxd[1].xd0 = htole32(R0_OWN);
rxd[1].xd1 = htole32(VTOPHYS(l->rxstore[1]));
rxd[1].xd2 = htole32(FRAMESIZE << 16);
rxd[1].xd3 = htole32(VTOPHYS(&rxd[0]));
wbinv(l, sizeof(struct local));
l->rx = 0;
/* enable transmitter and receiver */
l->ctl0 = CTL0_TXON | CTL0_RXON | CTL0_START;
CSR_WRITE_4(l, VR_RDBA, VTOPHYS(rxd));
CSR_WRITE_4(l, VR_TDBA, VTOPHYS(txd));
CSR_WRITE_1(l, VR_RCR, 0);
CSR_WRITE_1(l, VR_TCR, 0);
CSR_WRITE_2(l, VR_ISR, ~0);
CSR_WRITE_2(l, VR_IEN, 0);
if (fdx)
CSR_WRITE_1(l, VR_CTL1, CTL1_FDX);
CSR_WRITE_1(l, VR_CTL0, CTL0_START);
CSR_WRITE_1(l, VR_CTL0, l->ctl0);
return l;
}
int
nvt_send(void *dev, char *buf, unsigned len)
{
struct local *l = dev;
volatile struct desc *txd;
unsigned loop;
len = (len & T_FLMASK);
if (len < 60)
len = 60; /* needs to stretch to ETHER_MIN_LEN - 4 */
wbinv(buf, len);
txd = &l->txd;
txd->xd3 = htole32(txd);
txd->xd2 = htole32(VTOPHYS(buf));
txd->xd1 = htole32(T1_STP | T1_EDP | len);
txd->xd0 = htole32(T0_OWN);
wbinv(txd, sizeof(struct desc));
CSR_WRITE_1(l, VR_CTL0, l->ctl0 | CTL0_TDMD);
loop = 100;
do {
if ((le32toh(txd->xd0) & T0_OWN) == 0)
goto done;
DELAY(10);
inv(txd, sizeof(struct desc));
} while (--loop > 0);
printf("xmit failed\n");
return -1;
done:
return len;
}
int
nvt_recv(void *dev, char *buf, unsigned maxlen, unsigned timo)
{
struct local *l = dev;
volatile struct desc *rxd;
unsigned bound, rxstat, len;
uint8_t *ptr;
bound = 1000 * timo;
printf("recving with %u sec. timeout\n", timo);
again:
rxd = &l->rxd[l->rx];
do {
inv(rxd, sizeof(struct desc));
rxstat = le32toh(rxd->xd0);
if ((rxstat & R0_OWN) == 0)
goto gotone;
DELAY(1000); /* 1 milli second */
} while (--bound > 0);
errno = 0;
return -1;
gotone:
if ((rxstat & R0_RXOK) == 0) {
rxd->xd0 = htole32(R0_OWN);
wbinv(rxd, sizeof(struct desc));
l->rx ^= 1;
goto again;
}
len = ((rxstat & R0_FLMASK) >> 16) - 4 /* HASFCS */;
if (len > maxlen)
len = maxlen;
ptr = l->rxstore[l->rx];
inv(ptr, len);
memcpy(buf, ptr, len);
rxd->xd0 = htole32(R0_OWN);
wbinv(rxd, sizeof(struct desc));
l->rx ^= 1;
return len;
}
static void
mii_autopoll(struct local *l)
{
int v;
CSR_WRITE_1(l, VR_MIICR, 0);
do {
DELAY(1);
v = CSR_READ_1(l, VR_MIISR);
} while ((v & MIIADR_MIDLE) == 0);
CSR_WRITE_1(l, VR_MIICR, MIICR_MAUTO);
do {
DELAY(1);
v = CSR_READ_1(l, VR_MIISR);
} while ((v & MIIADR_MIDLE) != 0);
}
static void
mii_stoppoll(struct local *l)
{
int v;
CSR_WRITE_1(l, VR_MIICR, 0);
do {
DELAY(1);
v = CSR_READ_1(l, VR_MIISR);
} while ((v & MIIADR_MIDLE) == 0);
}
static int
mii_read(struct local *l, int phy, int reg)
{
int v;
mii_stoppoll(l);
CSR_WRITE_1(l, VR_MIICFG, phy);
CSR_WRITE_1(l, VR_MIIADR, reg);
CSR_WRITE_1(l, VR_MIICR, MIICR_RCMD);
do {
v = CSR_READ_1(l, VR_MIICR);
} while (v & MIICR_RCMD);
v = CSR_READ_2(l, VR_MIIDATA);
mii_autopoll(l);
return v;
}
static void
mii_write(struct local *l, int phy, int reg, int data)
{
int v;
mii_stoppoll(l);
CSR_WRITE_2(l, VR_MIIDATA, data);
CSR_WRITE_1(l, VR_MIICFG, phy);
CSR_WRITE_1(l, VR_MIIADR, reg);
CSR_WRITE_1(l, VR_MIICR, MIICR_WCMD);
do {
v = CSR_READ_1(l, VR_MIICR);
} while (v & MIICR_WCMD);
mii_autopoll(l);
}
#define MII_BMCR 0x00 /* Basic mode control register (rw) */
#define BMCR_RESET 0x8000 /* reset */
#define BMCR_AUTOEN 0x1000 /* autonegotiation enable */
#define BMCR_ISO 0x0400 /* isolate */
#define BMCR_STARTNEG 0x0200 /* restart autonegotiation */
#define MII_BMSR 0x01 /* Basic mode status register (ro) */
#define BMSR_ACOMP 0x0020 /* Autonegotiation complete */
#define BMSR_LINK 0x0004 /* Link status */
#define MII_ANAR 0x04 /* Autonegotiation advertisement (rw) */
#define ANAR_FC 0x0400 /* local device supports PAUSE */
#define ANAR_TX_FD 0x0100 /* local device supports 100bTx FD */
#define ANAR_TX 0x0080 /* local device supports 100bTx */
#define ANAR_10_FD 0x0040 /* local device supports 10bT FD */
#define ANAR_10 0x0020 /* local device supports 10bT */
#define ANAR_CSMA 0x0001 /* protocol selector CSMA/CD */
#define MII_ANLPAR 0x05 /* Autonegotiation lnk partner abilities (rw) */
void
mii_dealan(struct local *l, unsigned timo)
{
unsigned anar, bound;
anar = ANAR_TX_FD | ANAR_TX | ANAR_10_FD | ANAR_10 | ANAR_CSMA;
mii_write(l, l->phy, MII_ANAR, anar);
mii_write(l, l->phy, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
l->anlpar = 0;
bound = getsecs() + timo;
do {
l->bmsr = mii_read(l, l->phy, MII_BMSR) |
mii_read(l, l->phy, MII_BMSR); /* read twice */
if ((l->bmsr & BMSR_LINK) && (l->bmsr & BMSR_ACOMP)) {
l->anlpar = mii_read(l, l->phy, MII_ANLPAR);
break;
}
DELAY(10 * 1000);
} while (getsecs() < bound);
return;
}
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