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NetBSD/sys/dev/pci/if_fxp_pci.c

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/* $NetBSD: if_fxp_pci.c,v 1.29 2002/10/02 16:51:24 thorpej Exp $ */
/*-
* Copyright (c) 1997, 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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.
*/
/*
* PCI bus front-end for the Intel i82557 fast Ethernet controller
* driver. Works with Intel Etherexpress Pro 10+, 100B, 100+ cards.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_fxp_pci.c,v 1.29 2002/10/02 16:51:24 thorpej Exp $");
#include "rnd.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/device.h>
#if NRND > 0
#include <sys/rnd.h>
#endif
#include <machine/endian.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_ether.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <dev/mii/miivar.h>
#include <dev/ic/i82557reg.h>
#include <dev/ic/i82557var.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
struct fxp_pci_softc {
struct fxp_softc psc_fxp;
pci_chipset_tag_t psc_pc; /* pci chipset tag */
pcireg_t psc_regs[0x20>>2]; /* saved PCI config regs (sparse) */
pcitag_t psc_tag; /* pci register tag */
void *psc_powerhook; /* power hook */
int psc_pwrmgmt_csr_reg; /* ACPI power management register */
pcireg_t psc_pwrmgmt_csr; /* ...and the contents at D0 */
};
int fxp_pci_match __P((struct device *, struct cfdata *, void *));
void fxp_pci_attach __P((struct device *, struct device *, void *));
int fxp_pci_enable __P((struct fxp_softc *));
void fxp_pci_disable __P((struct fxp_softc *));
static void fxp_pci_confreg_restore __P((struct fxp_pci_softc *psc));
static void fxp_pci_power __P((int why, void *arg));
CFATTACH_DECL(fxp_pci, sizeof(struct fxp_pci_softc),
fxp_pci_match, fxp_pci_attach, NULL, NULL);
const struct fxp_pci_product {
u_int32_t fpp_prodid; /* PCI product ID */
const char *fpp_name; /* device name */
} fxp_pci_products[] = {
{ PCI_PRODUCT_INTEL_82557,
"Intel i82557 Ethernet" },
{ PCI_PRODUCT_INTEL_82559ER,
"Intel i82559ER Ethernet" },
{ PCI_PRODUCT_INTEL_IN_BUSINESS,
"Intel InBusiness Ethernet" },
{ PCI_PRODUCT_INTEL_82801BA_LAN,
"Intel i82562 Ethernet" },
{ PCI_PRODUCT_INTEL_82801E_LAN_1,
"Intel i82559 Ethernet" },
{ PCI_PRODUCT_INTEL_82801E_LAN_2,
"Intel i82559 Ethernet" },
{ PCI_PRODUCT_INTEL_PRO_100_VE_0,
"Intel PRO/100 VE Network Controller" },
{ PCI_PRODUCT_INTEL_PRO_100_VE_1,
"Intel PRO/100 VE Network Controller" },
{ PCI_PRODUCT_INTEL_PRO_100_VE_2,
"Intel PRO/100 VE Network Controller with 82562ET/EZ PHY" },
{ PCI_PRODUCT_INTEL_PRO_100_VE_3,
"Intel PRO/100 VE Network Controller with 82562ET/EZ (CNR) PHY" },
{ PCI_PRODUCT_INTEL_PRO_100_VE_4,
"Intel PRO/100 VE (MOB) Network Controller" },
{ PCI_PRODUCT_INTEL_PRO_100_VM_0,
"Intel PRO/100 VM Network Controller" },
{ PCI_PRODUCT_INTEL_PRO_100_VM_1,
"Intel PRO/100 VM Network Controller" },
{ PCI_PRODUCT_INTEL_PRO_100_VM_2,
"Intel PRO/100 VM Network Controller" },
{ 0,
NULL },
};
static const struct fxp_pci_product *
fxp_pci_lookup(const struct pci_attach_args *pa)
{
const struct fxp_pci_product *fpp;
if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_INTEL)
return (NULL);
for (fpp = fxp_pci_products; fpp->fpp_name != NULL; fpp++)
if (PCI_PRODUCT(pa->pa_id) == fpp->fpp_prodid)
return (fpp);
return (NULL);
}
int
fxp_pci_match(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct pci_attach_args *pa = aux;
if (fxp_pci_lookup(pa) != NULL)
return (1);
return (0);
}
/*
* Restore PCI configuration registers that may have been clobbered.
* This is necessary due to bugs on the Sony VAIO Z505-series on-board
* ethernet, after an APM suspend/resume, as well as after an ACPI
* D3->D0 transition. We call this function from a power hook after
* APM resume events, as well as after the ACPI D3->D0 transition.
*/
static void
fxp_pci_confreg_restore(psc)
struct fxp_pci_softc *psc;
{
pcireg_t reg;
#if 0
/*
* Check to see if the command register is blank -- if so, then
* we'll assume that all the clobberable-registers have been
* clobbered.
*/
/*
* In general, the above metric is accurate. Unfortunately,
* it is inaccurate across a hibernation. Ideally APM/ACPI
* code should take note of hibernation events and execute
* a hibernation wakeup hook, but at present a hibernation wake
* is indistinguishable from a suspend wake.
*/
if (((reg = pci_conf_read(psc->psc_pc, psc->psc_tag,
PCI_COMMAND_STATUS_REG)) & 0xffff) != 0)
return;
#else
reg = pci_conf_read(psc->psc_pc, psc->psc_tag, PCI_COMMAND_STATUS_REG);
#endif
pci_conf_write(psc->psc_pc, psc->psc_tag,
PCI_COMMAND_STATUS_REG,
(reg & 0xffff0000) |
(psc->psc_regs[PCI_COMMAND_STATUS_REG>>2] & 0xffff));
pci_conf_write(psc->psc_pc, psc->psc_tag, PCI_BHLC_REG,
psc->psc_regs[PCI_BHLC_REG>>2]);
pci_conf_write(psc->psc_pc, psc->psc_tag, PCI_MAPREG_START+0x0,
psc->psc_regs[(PCI_MAPREG_START+0x0)>>2]);
pci_conf_write(psc->psc_pc, psc->psc_tag, PCI_MAPREG_START+0x4,
psc->psc_regs[(PCI_MAPREG_START+0x4)>>2]);
pci_conf_write(psc->psc_pc, psc->psc_tag, PCI_MAPREG_START+0x8,
psc->psc_regs[(PCI_MAPREG_START+0x8)>>2]);
}
/*
* Power handler routine. Called when the system is transitioning into/out
* of power save modes. We restore the (bashed) PCI configuration registers
* on a resume.
*/
static void
fxp_pci_power(why, arg)
int why;
void *arg;
{
struct fxp_pci_softc *psc = arg;
if (why == PWR_RESUME)
fxp_pci_confreg_restore(psc);
}
void
fxp_pci_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct fxp_pci_softc *psc = (struct fxp_pci_softc *)self;
struct fxp_softc *sc = (struct fxp_softc *)self;
struct pci_attach_args *pa = aux;
pci_chipset_tag_t pc = pa->pa_pc;
pci_intr_handle_t ih;
const struct fxp_pci_product *fpp;
const char *intrstr = NULL;
bus_space_tag_t iot, memt;
bus_space_handle_t ioh, memh;
int ioh_valid, memh_valid;
bus_addr_t addr;
bus_size_t size;
int flags;
int pci_pwrmgmt_cap_reg;
/*
* Map control/status registers.
*/
ioh_valid = (pci_mapreg_map(pa, FXP_PCI_IOBA,
PCI_MAPREG_TYPE_IO, 0,
&iot, &ioh, NULL, NULL) == 0);
/*
* Version 2.1 of the PCI spec, page 196, "Address Maps":
*
* Prefetchable
*
* Set to one if there are no side effects on reads, the
* device returns all bytes regardless of the byte enables,
* and host bridges can merge processor writes into this
* range without causing errors. Bit must be set to zero
* otherwise.
*
* The 82557 incorrectly sets the "prefetchable" bit, resulting
* in errors on systems which will do merged reads and writes.
* These errors manifest themselves as all-bits-set when reading
* from the EEPROM or other < 4 byte registers.
*
* We must work around this problem by always forcing the mapping
* for memory space to be uncacheable. On systems which cannot
* create an uncacheable mapping (because the firmware mapped it
* into only cacheable/prefetchable space due to the "prefetchable"
* bit), we can fall back onto i/o mapped access.
*/
memh_valid = 0;
memt = pa->pa_memt;
if (((pa->pa_flags & PCI_FLAGS_MEM_ENABLED) != 0) &&
pci_mapreg_info(pa->pa_pc, pa->pa_tag, FXP_PCI_MMBA,
PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT,
&addr, &size, &flags) == 0) {
flags &= ~BUS_SPACE_MAP_PREFETCHABLE;
if (bus_space_map(memt, addr, size, flags, &memh) == 0)
memh_valid = 1;
}
if (memh_valid) {
sc->sc_st = memt;
sc->sc_sh = memh;
} else if (ioh_valid) {
sc->sc_st = iot;
sc->sc_sh = ioh;
} else {
printf(": unable to map device registers\n");
return;
}
sc->sc_dmat = pa->pa_dmat;
fpp = fxp_pci_lookup(pa);
if (fpp == NULL) {
printf("\n");
panic("fxp_pci_attach: impossible");
}
sc->sc_rev = PCI_REVISION(pa->pa_class);
switch (fpp->fpp_prodid) {
case PCI_PRODUCT_INTEL_82557:
case PCI_PRODUCT_INTEL_82559ER:
case PCI_PRODUCT_INTEL_IN_BUSINESS:
{
const char *chipname = NULL;
if (sc->sc_rev >= FXP_REV_82558_A4) {
chipname = "i82558 Ethernet";
/*
* Enable the MWI command for memory writes.
*/
if (pa->pa_flags & PCI_FLAGS_MWI_OKAY)
sc->sc_flags |= FXPF_MWI;
}
if (sc->sc_rev >= FXP_REV_82559_A0)
chipname = "i82559 Ethernet";
if (sc->sc_rev >= FXP_REV_82559S_A)
chipname = "i82559S Ethernet";
if (sc->sc_rev >= FXP_REV_82550)
chipname = "i82550 Ethernet";
/*
* Mark all i82559 and i82550 revisions as having
* the "resume bug". See i82557.c for details.
*/
if (sc->sc_rev >= FXP_REV_82559_A0)
sc->sc_flags |= FXPF_HAS_RESUME_BUG;
printf(": %s, rev %d\n", chipname != NULL ? chipname :
fpp->fpp_name, sc->sc_rev);
break;
}
case PCI_PRODUCT_INTEL_82801BA_LAN:
printf(": %s, rev %d\n", fpp->fpp_name, sc->sc_rev);
/*
* The 82801BA Ethernet has a bug which requires us to send a
* NOP before a CU_RESUME if we're in 10baseT mode.
*/
if (fpp->fpp_prodid == PCI_PRODUCT_INTEL_82801BA_LAN)
sc->sc_flags |= FXPF_HAS_RESUME_BUG;
break;
case PCI_PRODUCT_INTEL_PRO_100_VE_0:
case PCI_PRODUCT_INTEL_PRO_100_VE_1:
case PCI_PRODUCT_INTEL_PRO_100_VM_0:
case PCI_PRODUCT_INTEL_PRO_100_VM_1:
case PCI_PRODUCT_INTEL_82562EH_HPNA_0:
case PCI_PRODUCT_INTEL_82562EH_HPNA_1:
case PCI_PRODUCT_INTEL_82562EH_HPNA_2:
case PCI_PRODUCT_INTEL_PRO_100_VM_2:
printf(": %s, rev %d\n", fpp->fpp_name, sc->sc_rev);
/*
* ICH3 chips apparently have problems with the enhanced
* features, so just treat them as an i82557. It also
* has the resume bug that the ICH2 has.
*/
sc->sc_rev = 1;
sc->sc_flags |= FXPF_HAS_RESUME_BUG;
break;
case PCI_PRODUCT_INTEL_82801E_LAN_1:
case PCI_PRODUCT_INTEL_82801E_LAN_2:
printf(": %s, rev %d\n", fpp->fpp_name, sc->sc_rev);
/*
* XXX We have to read the C-ICH's developer's manual
* in detail
*/
break;
}
/* Make sure bus-mastering is enabled. */
pci_conf_write(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG) |
PCI_COMMAND_MASTER_ENABLE);
/*
* Under some circumstances (such as APM suspend/resume
* cycles, and across ACPI power state changes), the
* i82257-family can lose the contents of critical PCI
* configuration registers, causing the card to be
* non-responsive and useless. This occurs on the Sony VAIO
* Z505-series, among others. Preserve them here so they can
* be later restored (by fxp_pci_confreg_restore()).
*/
psc->psc_pc = pc;
psc->psc_tag = pa->pa_tag;
psc->psc_regs[PCI_COMMAND_STATUS_REG>>2] =
pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
psc->psc_regs[PCI_BHLC_REG>>2] =
pci_conf_read(pc, pa->pa_tag, PCI_BHLC_REG);
psc->psc_regs[(PCI_MAPREG_START+0x0)>>2] =
pci_conf_read(pc, pa->pa_tag, PCI_MAPREG_START+0x0);
psc->psc_regs[(PCI_MAPREG_START+0x4)>>2] =
pci_conf_read(pc, pa->pa_tag, PCI_MAPREG_START+0x4);
psc->psc_regs[(PCI_MAPREG_START+0x8)>>2] =
pci_conf_read(pc, pa->pa_tag, PCI_MAPREG_START+0x8);
/*
* Work around BIOS ACPI bugs where the chip is inadvertantly
* left in ACPI D3 (lowest power state). First confirm the device
* supports ACPI power management, then move it to the D0 (fully
* functional) state if it is not already there.
*/
if (pci_get_capability(pc, pa->pa_tag, PCI_CAP_PWRMGMT,
&pci_pwrmgmt_cap_reg, 0)) {
pcireg_t reg;
sc->sc_enable = fxp_pci_enable;
sc->sc_disable = fxp_pci_disable;
psc->psc_pwrmgmt_csr_reg = pci_pwrmgmt_cap_reg + 4;
reg = pci_conf_read(pc, pa->pa_tag, psc->psc_pwrmgmt_csr_reg);
psc->psc_pwrmgmt_csr = (reg & ~PCI_PMCSR_STATE_MASK) |
PCI_PMCSR_STATE_D0;
if ((reg & PCI_PMCSR_STATE_MASK) != PCI_PMCSR_STATE_D0)
pci_conf_write(pc, pa->pa_tag, psc->psc_pwrmgmt_csr_reg,
psc->psc_pwrmgmt_csr);
}
/* Restore PCI configuration registers. */
fxp_pci_confreg_restore(psc);
sc->sc_enabled = 1;
/*
* Map and establish our interrupt.
*/
if (pci_intr_map(pa, &ih)) {
printf("%s: couldn't map interrupt\n", sc->sc_dev.dv_xname);
return;
}
intrstr = pci_intr_string(pc, ih);
sc->sc_ih = pci_intr_establish(pc, ih, IPL_NET, fxp_intr, sc);
if (sc->sc_ih == NULL) {
printf("%s: couldn't establish interrupt",
sc->sc_dev.dv_xname);
if (intrstr != NULL)
printf(" at %s", intrstr);
printf("\n");
return;
}
printf("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr);
/* Finish off the attach. */
fxp_attach(sc);
if (sc->sc_disable != NULL)
fxp_disable(sc);
/* Add a suspend hook to restore PCI config state */
psc->psc_powerhook = powerhook_establish(fxp_pci_power, psc);
if (psc->psc_powerhook == NULL)
printf ("%s: WARNING: unable to establish pci power hook\n",
sc->sc_dev.dv_xname);
}
int
fxp_pci_enable(struct fxp_softc *sc)
{
struct fxp_pci_softc *psc = (void *) sc;
#if 0
printf("%s: going to power state D0\n", sc->sc_dev.dv_xname);
#endif
/* Bring the device into D0 power state. */
pci_conf_write(psc->psc_pc, psc->psc_tag,
psc->psc_pwrmgmt_csr_reg, psc->psc_pwrmgmt_csr);
/* Now restore the configuration registers. */
fxp_pci_confreg_restore(psc);
return (0);
}
void
fxp_pci_disable(struct fxp_softc *sc)
{
struct fxp_pci_softc *psc = (void *) sc;
/*
* for some 82558_A4 and 82558_B0, entering D3 state makes
* media detection disordered.
*/
if (sc->sc_rev <= FXP_REV_82558_B0)
return;
#if 0
printf("%s: going to power state D3\n", sc->sc_dev.dv_xname);
#endif
/* Put the device into D3 state. */
pci_conf_write(psc->psc_pc, psc->psc_tag,
psc->psc_pwrmgmt_csr_reg, (psc->psc_pwrmgmt_csr &
~PCI_PMCSR_STATE_MASK) | PCI_PMCSR_STATE_D3);
}
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