/* $OpenBSD: if_athn_cardbus.c,v 1.14 2015/11/24 17:11:39 mpi Exp $ */ /*- * Copyright (c) 2009 Damien Bergamini * * 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 Atheros 802.11a/g/n chipsets. */ #include "bpfilter.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct athn_cardbus_softc { struct athn_softc sc_sc; /* CardBus specific goo. */ cardbus_devfunc_t sc_ct; pcitag_t sc_tag; void *sc_ih; bus_space_tag_t sc_st; bus_space_handle_t sc_sh; bus_size_t sc_mapsize; pcireg_t sc_bar_val; int sc_intrline; pci_chipset_tag_t sc_pc; }; int athn_cardbus_match(struct device *, void *, void *); void athn_cardbus_attach(struct device *, struct device *, void *); int athn_cardbus_detach(struct device *, int); int athn_cardbus_enable(struct athn_softc *); void athn_cardbus_disable(struct athn_softc *); void athn_cardbus_power(struct athn_softc *, int); void athn_cardbus_setup(struct athn_cardbus_softc *); uint32_t athn_cardbus_read(struct athn_softc *, uint32_t); void athn_cardbus_write(struct athn_softc *, uint32_t, uint32_t); void athn_cardbus_write_barrier(struct athn_softc *); struct cfattach athn_cardbus_ca = { sizeof (struct athn_cardbus_softc), athn_cardbus_match, athn_cardbus_attach, athn_cardbus_detach }; static const struct pci_matchid athn_cardbus_devices[] = { { PCI_VENDOR_ATHEROS, PCI_PRODUCT_ATHEROS_AR5416 }, { PCI_VENDOR_ATHEROS, PCI_PRODUCT_ATHEROS_AR5418 }, { PCI_VENDOR_ATHEROS, PCI_PRODUCT_ATHEROS_AR9160 }, { PCI_VENDOR_ATHEROS, PCI_PRODUCT_ATHEROS_AR9280 }, { PCI_VENDOR_ATHEROS, PCI_PRODUCT_ATHEROS_AR9281 }, { PCI_VENDOR_ATHEROS, PCI_PRODUCT_ATHEROS_AR9285 }, { PCI_VENDOR_ATHEROS, PCI_PRODUCT_ATHEROS_AR2427 }, { PCI_VENDOR_ATHEROS, PCI_PRODUCT_ATHEROS_AR9227 }, { PCI_VENDOR_ATHEROS, PCI_PRODUCT_ATHEROS_AR9287 }, { PCI_VENDOR_ATHEROS, PCI_PRODUCT_ATHEROS_AR9300 } }; int athn_cardbus_match(struct device *parent, void *match, void *aux) { return (cardbus_matchbyid(aux, athn_cardbus_devices, nitems(athn_cardbus_devices))); } void athn_cardbus_attach(struct device *parent, struct device *self, void *aux) { struct athn_cardbus_softc *csc = (struct athn_cardbus_softc *)self; struct athn_softc *sc = &csc->sc_sc; struct cardbus_attach_args *ca = aux; cardbus_devfunc_t ct = ca->ca_ct; bus_addr_t base; int error; sc->sc_dmat = ca->ca_dmat; csc->sc_ct = ct; csc->sc_tag = ca->ca_tag; csc->sc_intrline = ca->ca_intrline; csc->sc_pc = ca->ca_pc; /* Power management hooks. */ sc->sc_enable = athn_cardbus_enable; sc->sc_disable = athn_cardbus_disable; sc->sc_power = athn_cardbus_power; sc->ops.read = athn_cardbus_read; sc->ops.write = athn_cardbus_write; sc->ops.write_barrier = athn_cardbus_write_barrier; /* Map control/status registers. */ error = Cardbus_mapreg_map(ct, CARDBUS_BASE0_REG, PCI_MAPREG_TYPE_MEM, 0, &csc->sc_st, &csc->sc_sh, &base, &csc->sc_mapsize); if (error != 0) { printf(": can't map mem space\n"); return; } csc->sc_bar_val = base | PCI_MAPREG_TYPE_MEM; /* Set up the PCI configuration registers. */ athn_cardbus_setup(csc); printf(": irq %d\n", csc->sc_intrline); athn_attach(sc); Cardbus_function_disable(ct); } int athn_cardbus_detach(struct device *self, int flags) { struct athn_cardbus_softc *csc = (struct athn_cardbus_softc *)self; struct athn_softc *sc = &csc->sc_sc; cardbus_devfunc_t ct = csc->sc_ct; cardbus_chipset_tag_t cc = ct->ct_cc; cardbus_function_tag_t cf = ct->ct_cf; athn_detach(sc); /* Unhook the interrupt handler. */ if (csc->sc_ih != NULL) cardbus_intr_disestablish(cc, cf, csc->sc_ih); /* Release bus space and close window. */ Cardbus_mapreg_unmap(ct, CARDBUS_BASE0_REG, csc->sc_st, csc->sc_sh, csc->sc_mapsize); return (0); } int athn_cardbus_enable(struct athn_softc *sc) { struct athn_cardbus_softc *csc = (struct athn_cardbus_softc *)sc; cardbus_devfunc_t ct = csc->sc_ct; cardbus_chipset_tag_t cc = ct->ct_cc; cardbus_function_tag_t cf = ct->ct_cf; /* Power on the socket. */ Cardbus_function_enable(ct); /* Setup the PCI configuration registers. */ athn_cardbus_setup(csc); /* Map and establish the interrupt handler. */ csc->sc_ih = cardbus_intr_establish(cc, cf, csc->sc_intrline, IPL_NET, athn_intr, sc, sc->sc_dev.dv_xname); if (csc->sc_ih == NULL) { printf("%s: could not establish interrupt at %d\n", sc->sc_dev.dv_xname, csc->sc_intrline); Cardbus_function_disable(ct); return (1); } return (0); } void athn_cardbus_disable(struct athn_softc *sc) { struct athn_cardbus_softc *csc = (struct athn_cardbus_softc *)sc; cardbus_devfunc_t ct = csc->sc_ct; cardbus_chipset_tag_t cc = ct->ct_cc; cardbus_function_tag_t cf = ct->ct_cf; /* Unhook the interrupt handler. */ cardbus_intr_disestablish(cc, cf, csc->sc_ih); csc->sc_ih = NULL; /* Power down the socket. */ Cardbus_function_disable(ct); } void athn_cardbus_power(struct athn_softc *sc, int why) { struct athn_cardbus_softc *csc = (struct athn_cardbus_softc *)sc; if (why == DVACT_RESUME) { /* Restore the PCI configuration registers. */ athn_cardbus_setup(csc); } } void athn_cardbus_setup(struct athn_cardbus_softc *csc) { cardbus_devfunc_t ct = csc->sc_ct; cardbus_chipset_tag_t cc = ct->ct_cc; pci_chipset_tag_t pc = csc->sc_pc; cardbus_function_tag_t cf = ct->ct_cf; pcireg_t reg; /* Program the BAR. */ pci_conf_write(pc, csc->sc_tag, CARDBUS_BASE0_REG, csc->sc_bar_val); /* Make sure the right access type is on the cardbus bridge. */ (*cf->cardbus_ctrl)(cc, CARDBUS_MEM_ENABLE); (*cf->cardbus_ctrl)(cc, CARDBUS_BM_ENABLE); /* Enable the appropriate bits in the PCI CSR. */ reg = pci_conf_read(pc, csc->sc_tag, PCI_COMMAND_STATUS_REG); reg |= PCI_COMMAND_MASTER_ENABLE | PCI_COMMAND_MEM_ENABLE; pci_conf_write(pc, csc->sc_tag, PCI_COMMAND_STATUS_REG, reg); /* * Noone knows why this shit is necessary but there are claims that * not doing this may cause very frequent PCI FATAL interrupts from * the card: http://bugzilla.kernel.org/show_bug.cgi?id=13483 */ reg = pci_conf_read(pc, csc->sc_tag, 0x40); if (reg & 0xff00) pci_conf_write(pc, csc->sc_tag, 0x40, reg & ~0xff00); /* Change latency timer; default value yields poor results. */ reg = pci_conf_read(pc, csc->sc_tag, PCI_BHLC_REG); reg &= ~(PCI_LATTIMER_MASK << PCI_LATTIMER_SHIFT); reg |= 168 << PCI_LATTIMER_SHIFT; pci_conf_write(pc, csc->sc_tag, PCI_BHLC_REG, reg); } uint32_t athn_cardbus_read(struct athn_softc *sc, uint32_t addr) { struct athn_cardbus_softc *csc = (struct athn_cardbus_softc *)sc; return (bus_space_read_4(csc->sc_st, csc->sc_sh, addr)); } void athn_cardbus_write(struct athn_softc *sc, uint32_t addr, uint32_t val) { struct athn_cardbus_softc *csc = (struct athn_cardbus_softc *)sc; bus_space_write_4(csc->sc_st, csc->sc_sh, addr, val); } void athn_cardbus_write_barrier(struct athn_softc *sc) { struct athn_cardbus_softc *csc = (struct athn_cardbus_softc *)sc; bus_space_barrier(csc->sc_st, csc->sc_sh, 0, csc->sc_mapsize, BUS_SPACE_BARRIER_WRITE); }