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/* $OpenBSD: if_re_cardbus.c,v 1.29 2020/06/17 10:48:44 claudio Exp $ */
/*
* Copyright (c) 2005 Peter Valchev <pvalchev@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Cardbus front-end for the Realtek 8169
*/
#include <sys/param.h>
#include <sys/endian.h>
#include <sys/systm.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/timeout.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_media.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <dev/mii/miivar.h>
#include <dev/pci/pcidevs.h>
#include <dev/cardbus/cardbusvar.h>
#include <dev/ic/rtl81x9reg.h>
#include <dev/ic/revar.h>
struct re_cardbus_softc {
/* General */
struct rl_softc sc_rl;
/* Cardbus-specific data */
cardbus_devfunc_t ct;
pcitag_t sc_tag;
pci_chipset_tag_t sc_pc;
int sc_csr;
int sc_cben;
int sc_bar_reg;
pcireg_t sc_bar_val;
int sc_intrline;
bus_size_t sc_mapsize;
};
int re_cardbus_probe(struct device *, void *, void *);
void re_cardbus_attach(struct device *, struct device *, void *);
int re_cardbus_detach(struct device *, int);
void re_cardbus_setup(struct rl_softc *);
/*
* Cardbus autoconfig definitions
*/
struct cfattach re_cardbus_ca = {
sizeof(struct re_cardbus_softc),
re_cardbus_probe,
re_cardbus_attach,
re_cardbus_detach
};
const struct pci_matchid re_cardbus_devices[] = {
{ PCI_VENDOR_REALTEK, PCI_PRODUCT_REALTEK_RT8169 },
};
/*
* Probe for a Realtek 8169/8110 chip. Check the PCI vendor and device
* IDs against our list and return a device name if we find a match.
*/
int
re_cardbus_probe(struct device *parent, void *match, void *aux)
{
return (cardbus_matchbyid((struct cardbus_attach_args *)aux,
re_cardbus_devices, nitems(re_cardbus_devices)));
}
/*
* Attach the interface. Allocate softc structures, do ifmedia
* setup and ethernet/BPF attach.
*/
void
re_cardbus_attach(struct device *parent, struct device *self, void *aux)
{
struct re_cardbus_softc *csc = (struct re_cardbus_softc *)self;
struct rl_softc *sc = &csc->sc_rl;
struct cardbus_attach_args *ca = aux;
struct cardbus_softc *psc =
(struct cardbus_softc *)sc->sc_dev.dv_parent;
cardbus_chipset_tag_t cc = psc->sc_cc;
cardbus_function_tag_t cf = psc->sc_cf;
cardbus_devfunc_t ct = ca->ca_ct;
bus_addr_t adr;
char intrstr[16];
sc->sc_dmat = ca->ca_dmat;
csc->ct = ct;
csc->sc_tag = ca->ca_tag;
csc->sc_pc = ca->ca_pc;
csc->sc_intrline = ca->ca_intrline;
/*
* Map control/status registers.
*/
if (Cardbus_mapreg_map(ct, RL_PCI_LOMEM, PCI_MAPREG_TYPE_MEM, 0,
&sc->rl_btag, &sc->rl_bhandle, &adr, &csc->sc_mapsize) == 0) {
csc->sc_cben = CARDBUS_MEM_ENABLE;
csc->sc_csr |= PCI_COMMAND_MEM_ENABLE;
csc->sc_bar_reg = RL_PCI_LOMEM;
csc->sc_bar_val = adr | PCI_MAPREG_TYPE_MEM;
} else {
printf(": can't map mem space\n");
return;
}
/* Enable power */
Cardbus_function_enable(ct);
/* Get chip out of powersave mode (if applicable), initialize
* config registers */
re_cardbus_setup(sc);
/* Allocate interrupt */
sc->sc_ih = cardbus_intr_establish(cc, cf, csc->sc_intrline,
IPL_NET, re_intr, sc, sc->sc_dev.dv_xname);
if (sc->sc_ih == NULL) {
printf(": couldn't establish interrupt at %d",
ca->ca_intrline);
Cardbus_function_disable(csc->ct);
return;
}
snprintf(intrstr, sizeof(intrstr), "irq %d", ca->ca_intrline);
sc->sc_product = PCI_PRODUCT(ca->ca_id);
/* Call bus-independent (common) attach routine */
if (re_attach(sc, intrstr)) {
cardbus_intr_disestablish(ct->ct_cc, ct->ct_cf, sc->sc_ih);
Cardbus_mapreg_unmap(ct, csc->sc_bar_reg, sc->rl_btag,
sc->rl_bhandle, csc->sc_mapsize);
}
}
/*
* Get chip out of power-saving mode, init registers
*/
void
re_cardbus_setup(struct rl_softc *sc)
{
struct re_cardbus_softc *csc = (struct re_cardbus_softc *)sc;
cardbus_devfunc_t ct = csc->ct;
cardbus_chipset_tag_t cc = ct->ct_cc;
pci_chipset_tag_t pc = csc->sc_pc;
pcireg_t reg, command;
int pmreg;
/* Handle power management nonsense */
if (pci_get_capability(pc, csc->sc_tag,
PCI_CAP_PWRMGMT, &pmreg, 0)) {
command = pci_conf_read(pc, csc->sc_tag,
pmreg + PCI_PMCSR);
if (command & RL_PSTATE_MASK) {
pcireg_t iobase, membase, irq;
/* Save important PCI config data */
iobase = pci_conf_read(pc, csc->sc_tag, RL_PCI_LOIO);
membase = pci_conf_read(pc, csc->sc_tag, RL_PCI_LOMEM);
irq = pci_conf_read(pc, csc->sc_tag, RL_PCI_INTLINE);
/* Reset the power state */
printf("%s: chip is in D%d power mode "
"-- setting to D0\n", sc->sc_dev.dv_xname,
command & RL_PSTATE_MASK);
command &= RL_PSTATE_MASK;
pci_conf_write(pc, csc->sc_tag, pmreg + PCI_PMCSR,
command);
/* Restore PCI config data */
pci_conf_write(pc, csc->sc_tag, RL_PCI_LOIO, iobase);
pci_conf_write(pc, csc->sc_tag, RL_PCI_LOMEM, membase);
pci_conf_write(pc, csc->sc_tag, RL_PCI_INTLINE, irq);
}
}
/* Make sure the right access type is on the Cardbus bridge */
(*ct->ct_cf->cardbus_ctrl)(cc, csc->sc_cben);
(*ct->ct_cf->cardbus_ctrl)(cc, CARDBUS_BM_ENABLE);
/* Program the BAR */
pci_conf_write(pc, csc->sc_tag, csc->sc_bar_reg, csc->sc_bar_val);
/* Enable proper bits in CARDBUS CSR */
reg = pci_conf_read(pc, csc->sc_tag, PCI_COMMAND_STATUS_REG);
reg &= ~(PCI_COMMAND_IO_ENABLE|PCI_COMMAND_MEM_ENABLE);
reg |= csc->sc_csr;
pci_conf_write(pc, csc->sc_tag, PCI_COMMAND_STATUS_REG, reg);
/* Make sure the latency timer is set to some reasonable value */
reg = pci_conf_read(pc, csc->sc_tag, PCI_BHLC_REG);
if (PCI_LATTIMER(reg) < 0x20) {
reg &= ~(PCI_LATTIMER_MASK << PCI_LATTIMER_SHIFT);
reg |= (0x20 << PCI_LATTIMER_SHIFT);
pci_conf_write(pc, csc->sc_tag, PCI_BHLC_REG, reg);
}
}
/*
* Cardbus detach function: deallocate all resources
*/
int
re_cardbus_detach(struct device *self, int flags)
{
struct re_cardbus_softc *csc = (void *)self;
struct rl_softc *sc = &csc->sc_rl;
struct cardbus_devfunc *ct = csc->ct;
struct ifnet *ifp = &sc->sc_arpcom.ac_if;
/* Remove timeout handler */
timeout_del(&sc->timer_handle);
/* Detach PHY */
if (LIST_FIRST(&sc->sc_mii.mii_phys) != NULL)
mii_detach(&sc->sc_mii, MII_PHY_ANY, MII_OFFSET_ANY);
/* Delete media stuff */
ifmedia_delete_instance(&sc->sc_mii.mii_media, IFM_INST_ANY);
ether_ifdetach(ifp);
if_detach(ifp);
/* Disable interrupts */
if (sc->sc_ih != NULL)
cardbus_intr_disestablish(ct->ct_cc, ct->ct_cf, sc->sc_ih);
/* Free cardbus resources */
Cardbus_mapreg_unmap(ct, csc->sc_bar_reg, sc->rl_btag, sc->rl_bhandle,
csc->sc_mapsize);
return (0);
}
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