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Record characteristics of the bus connection at attach time.

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This commit is contained in:
thorpej 2003-10-21 04:35:01 +00:00
parent 8b99487c1e
commit 2cadb9ce85
1 changed files with 50 additions and 2 deletions
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52
sys/dev/pci/if_wm.c
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@ -1,4 +1,4 @@
/* $NetBSD: if_wm.c,v 1.51 2003/10/20 22:52:19 thorpej Exp $ */
/* $NetBSD: if_wm.c,v 1.52 2003/10/21 04:35:01 thorpej Exp $ */
/*
* Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
@ -44,7 +44,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_wm.c,v 1.51 2003/10/20 22:52:19 thorpej Exp $");
__KERNEL_RCSID(0, "$NetBSD: if_wm.c,v 1.52 2003/10/21 04:35:01 thorpej Exp $");
#include "bpfilter.h"
#include "rnd.h"
@ -207,6 +207,7 @@ struct wm_softc {
wm_chip_type sc_type; /* chip type */
int sc_flags; /* flags; see below */
int sc_bus_speed; /* PCI/PCIX bus speed */
void *sc_ih; /* interrupt cookie */
@ -316,6 +317,8 @@ do { \
/* sc_flags */
#define WM_F_HAS_MII 0x01 /* has MII */
#define WM_F_EEPROM_HANDSHAKE 0x02 /* requires EEPROM handshake */
#define WM_F_BUS64 0x10 /* bus is 64-bit */
#define WM_F_PCIX 0x20 /* bus is PCI-X */
#ifdef WM_EVENT_COUNTERS
#define WM_EVCNT_INCR(ev) (ev)->ev_count++
@ -693,6 +696,51 @@ wm_attach(struct device *parent, struct device *self, void *aux)
}
aprint_normal("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
/*
* Determine a few things about the bus we're connected to.
*/
if (sc->sc_type < WM_T_82543) {
/* We don't really know the bus characteristics here. */
sc->sc_bus_speed = 33;
} else {
reg = CSR_READ(sc, WMREG_STATUS);
if (reg & STATUS_BUS64)
sc->sc_flags |= WM_F_BUS64;
if (sc->sc_type >= WM_T_82544 &&
(reg & STATUS_PCIX_MODE) != 0)
sc->sc_flags |= WM_F_PCIX;
/*
* The quad port adapter is special; it has a PCIX-PCIX
* bridge on the board, and can run the secondary bus at
* a higher speed.
*/
if (wmp->wmp_product == PCI_PRODUCT_INTEL_82546EB_QUAD) {
sc->sc_bus_speed = (sc->sc_flags & WM_F_PCIX) ? 120
: 66;
} else if (sc->sc_flags & WM_F_PCIX) {
switch (STATUS_PCIXSPD(reg)) {
case STATUS_PCIXSPD_50_66:
sc->sc_bus_speed = 66;
break;
case STATUS_PCIXSPD_66_100:
sc->sc_bus_speed = 100;
break;
case STATUS_PCIXSPD_100_133:
sc->sc_bus_speed = 133;
break;
default:
aprint_error(
"%s: unknown PCIXSPD %d; assuming 66MHz\n",
sc->sc_dev.dv_xname, STATUS_PCIXSPD(reg));
sc->sc_bus_speed = 66;
}
} else
sc->sc_bus_speed = (reg & STATUS_PCI66) ? 66 : 33;
aprint_verbose("%s: %d-bit %dMHz %s bus\n", sc->sc_dev.dv_xname,
(sc->sc_flags & WM_F_BUS64) ? 64 : 32, sc->sc_bus_speed,
(sc->sc_flags & WM_F_PCIX) ? "PCIX" : "PCI");
}
/*
* Allocate the control data structures, and create and load the
* DMA map for it.