/* $OpenBSD: if_wpi.c,v 1.58 2007/11/19 19:34:25 damien Exp $ */ /*- * Copyright (c) 2006, 2007 * 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. */ /* * Driver for Intel PRO/Wireless 3945ABG 802.11 network adapters. */ #include "bpfilter.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if NBPFILTER > 0 #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static const struct pci_matchid wpi_devices[] = { { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_PRO_WL_3945ABG_1 }, { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_PRO_WL_3945ABG_2 } }; int wpi_match(struct device *, void *, void *); void wpi_attach(struct device *, struct device *, void *); void wpi_sensor_attach(struct wpi_softc *); void wpi_radiotap_attach(struct wpi_softc *); void wpi_power(int, void *); int wpi_dma_contig_alloc(bus_dma_tag_t, struct wpi_dma_info *, void **, bus_size_t, bus_size_t, int); void wpi_dma_contig_free(struct wpi_dma_info *); int wpi_alloc_shared(struct wpi_softc *); void wpi_free_shared(struct wpi_softc *); int wpi_alloc_fwmem(struct wpi_softc *); void wpi_free_fwmem(struct wpi_softc *); struct wpi_rbuf *wpi_alloc_rbuf(struct wpi_softc *); void wpi_free_rbuf(caddr_t, u_int, void *); int wpi_alloc_rpool(struct wpi_softc *); void wpi_free_rpool(struct wpi_softc *); int wpi_alloc_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); void wpi_reset_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); void wpi_free_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); int wpi_alloc_tx_ring(struct wpi_softc *, struct wpi_tx_ring *, int); void wpi_reset_tx_ring(struct wpi_softc *, struct wpi_tx_ring *); void wpi_free_tx_ring(struct wpi_softc *, struct wpi_tx_ring *); struct ieee80211_node *wpi_node_alloc(struct ieee80211com *); void wpi_newassoc(struct ieee80211com *, struct ieee80211_node *, int); int wpi_media_change(struct ifnet *); int wpi_newstate(struct ieee80211com *, enum ieee80211_state, int); void wpi_mem_lock(struct wpi_softc *); void wpi_mem_unlock(struct wpi_softc *); uint32_t wpi_mem_read(struct wpi_softc *, uint16_t); void wpi_mem_write(struct wpi_softc *, uint16_t, uint32_t); void wpi_mem_write_region_4(struct wpi_softc *, uint16_t, const uint32_t *, int); int wpi_read_prom_data(struct wpi_softc *, uint32_t, void *, int); int wpi_load_microcode(struct wpi_softc *, const uint8_t *, int); int wpi_load_firmware(struct wpi_softc *); void wpi_calib_timeout(void *); void wpi_iter_func(void *, struct ieee80211_node *); void wpi_power_calibration(struct wpi_softc *, int); void wpi_rx_intr(struct wpi_softc *, struct wpi_rx_desc *, struct wpi_rx_data *); void wpi_tx_intr(struct wpi_softc *, struct wpi_rx_desc *); void wpi_cmd_intr(struct wpi_softc *, struct wpi_rx_desc *); void wpi_notif_intr(struct wpi_softc *); int wpi_intr(void *); void wpi_read_eeprom(struct wpi_softc *); void wpi_read_eeprom_channels(struct wpi_softc *, int); void wpi_read_eeprom_group(struct wpi_softc *, int); uint8_t wpi_plcp_signal(int); int wpi_tx_data(struct wpi_softc *, struct mbuf *, struct ieee80211_node *, int); void wpi_start(struct ifnet *); void wpi_watchdog(struct ifnet *); int wpi_ioctl(struct ifnet *, u_long, caddr_t); int wpi_cmd(struct wpi_softc *, int, const void *, int, int); int wpi_mrr_setup(struct wpi_softc *); int wpi_set_key(struct ieee80211com *, struct ieee80211_node *, const struct ieee80211_key *); void wpi_updateedca(struct ieee80211com *); void wpi_set_led(struct wpi_softc *, uint8_t, uint8_t, uint8_t); void wpi_enable_tsf(struct wpi_softc *, struct ieee80211_node *); int wpi_set_txpower(struct wpi_softc *, struct ieee80211_channel *, int); int wpi_get_power_index(struct wpi_softc *, struct wpi_power_group *, struct ieee80211_channel *, int); int wpi_auth(struct wpi_softc *); int wpi_scan(struct wpi_softc *, uint16_t); int wpi_config(struct wpi_softc *); void wpi_stop_master(struct wpi_softc *); int wpi_power_up(struct wpi_softc *); int wpi_reset(struct wpi_softc *); void wpi_hw_config(struct wpi_softc *); int wpi_init(struct ifnet *); void wpi_stop(struct ifnet *, int); #ifdef WPI_DEBUG #define DPRINTF(x) do { if (wpi_debug > 0) printf x; } while (0) #define DPRINTFN(n, x) do { if (wpi_debug >= (n)) printf x; } while (0) int wpi_debug = 1; #else #define DPRINTF(x) #define DPRINTFN(n, x) #endif struct cfattach wpi_ca = { sizeof (struct wpi_softc), wpi_match, wpi_attach }; int wpi_match(struct device *parent, void *match, void *aux) { return pci_matchbyid((struct pci_attach_args *)aux, wpi_devices, sizeof (wpi_devices) / sizeof (wpi_devices[0])); } /* Base Address Register */ #define WPI_PCI_BAR0 0x10 void wpi_attach(struct device *parent, struct device *self, void *aux) { struct wpi_softc *sc = (struct wpi_softc *)self; struct ieee80211com *ic = &sc->sc_ic; struct ifnet *ifp = &ic->ic_if; struct pci_attach_args *pa = aux; const char *intrstr; bus_space_tag_t memt; bus_space_handle_t memh; pci_intr_handle_t ih; pcireg_t data; int i, error; sc->sc_pct = pa->pa_pc; sc->sc_pcitag = pa->pa_tag; /* clear device specific PCI configuration register 0x41 */ data = pci_conf_read(sc->sc_pct, sc->sc_pcitag, 0x40); data &= ~0x0000ff00; pci_conf_write(sc->sc_pct, sc->sc_pcitag, 0x40, data); /* map the register window */ error = pci_mapreg_map(pa, WPI_PCI_BAR0, PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_32BIT, 0, &memt, &memh, NULL, &sc->sc_sz, 0); if (error != 0) { printf(": could not map memory space\n"); return; } sc->sc_st = memt; sc->sc_sh = memh; sc->sc_dmat = pa->pa_dmat; if (pci_intr_map(pa, &ih) != 0) { printf(": could not map interrupt\n"); return; } intrstr = pci_intr_string(sc->sc_pct, ih); sc->sc_ih = pci_intr_establish(sc->sc_pct, ih, IPL_NET, wpi_intr, sc, sc->sc_dev.dv_xname); if (sc->sc_ih == NULL) { printf(": could not establish interrupt"); if (intrstr != NULL) printf(" at %s", intrstr); printf("\n"); return; } printf(": %s", intrstr); /* * Put adapter into a known state. */ if ((error = wpi_reset(sc)) != 0) { printf(": could not reset adapter\n"); return; } /* * Allocate DMA memory for firmware transfers. */ if ((error = wpi_alloc_fwmem(sc)) != 0) { printf(": could not allocate firmware memory\n"); return; } /* * Allocate shared page and Tx/Rx rings. */ if ((error = wpi_alloc_shared(sc)) != 0) { printf(": could not allocate shared area\n"); goto fail1; } if ((error = wpi_alloc_rpool(sc)) != 0) { printf(": could not allocate Rx buffers\n"); goto fail2; } for (i = 0; i < WPI_NTXQUEUES; i++) { if ((error = wpi_alloc_tx_ring(sc, &sc->txq[i], i)) != 0) { printf(": could not allocate Tx ring %d\n", i); goto fail3; } } if ((error = wpi_alloc_rx_ring(sc, &sc->rxq)) != 0) { printf(": could not allocate Rx ring\n"); goto fail3; } ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */ ic->ic_state = IEEE80211_S_INIT; /* set device capabilities */ ic->ic_caps = IEEE80211_C_WEP | /* s/w WEP */ IEEE80211_C_MONITOR | /* monitor mode supported */ IEEE80211_C_TXPMGT | /* tx power management */ IEEE80211_C_SHSLOT | /* short slot time supported */ IEEE80211_C_SHPREAMBLE; /* short preamble supported */ /* read supported channels and MAC address from EEPROM */ wpi_read_eeprom(sc); /* set supported .11a, .11b and .11g rates */ ic->ic_sup_rates[IEEE80211_MODE_11A] = ieee80211_std_rateset_11a; ic->ic_sup_rates[IEEE80211_MODE_11B] = ieee80211_std_rateset_11b; ic->ic_sup_rates[IEEE80211_MODE_11G] = ieee80211_std_rateset_11g; /* IBSS channel undefined for now */ ic->ic_ibss_chan = &ic->ic_channels[0]; ifp->if_softc = sc; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; ifp->if_init = wpi_init; ifp->if_ioctl = wpi_ioctl; ifp->if_start = wpi_start; ifp->if_watchdog = wpi_watchdog; IFQ_SET_READY(&ifp->if_snd); memcpy(ifp->if_xname, sc->sc_dev.dv_xname, IFNAMSIZ); if_attach(ifp); ieee80211_ifattach(ifp); ic->ic_node_alloc = wpi_node_alloc; ic->ic_newassoc = wpi_newassoc; ic->ic_set_key = wpi_set_key; ic->ic_updateedca = wpi_updateedca; /* override state transition machine */ sc->sc_newstate = ic->ic_newstate; ic->ic_newstate = wpi_newstate; ieee80211_media_init(ifp, wpi_media_change, ieee80211_media_status); sc->amrr.amrr_min_success_threshold = 1; sc->amrr.amrr_max_success_threshold = 15; wpi_sensor_attach(sc); wpi_radiotap_attach(sc); timeout_set(&sc->calib_to, wpi_calib_timeout, sc); sc->powerhook = powerhook_establish(wpi_power, sc); return; /* free allocated memory if something failed during attachment */ fail3: while (--i >= 0) wpi_free_tx_ring(sc, &sc->txq[i]); wpi_free_rpool(sc); fail2: wpi_free_shared(sc); fail1: wpi_free_fwmem(sc); } /* * Attach the adapter's on-board thermal sensor to the sensors framework. */ void wpi_sensor_attach(struct wpi_softc *sc) { strlcpy(sc->sensordev.xname, sc->sc_dev.dv_xname, sizeof sc->sensordev.xname); strlcpy(sc->sensor.desc, "temperature 0 - 285", sizeof sc->sensor.desc); sc->sensor.type = SENSOR_INTEGER; /* not in muK! */ /* temperature invalid until interface is up */ sc->sensor.value = 0; sc->sensor.flags = SENSOR_FINVALID; sensor_attach(&sc->sensordev, &sc->sensor); sensordev_install(&sc->sensordev); } /* * Attach the interface to 802.11 radiotap. */ void wpi_radiotap_attach(struct wpi_softc *sc) { #if NBPFILTER > 0 bpfattach(&sc->sc_drvbpf, &sc->sc_ic.ic_if, DLT_IEEE802_11_RADIO, sizeof (struct ieee80211_frame) + IEEE80211_RADIOTAP_HDRLEN); sc->sc_rxtap_len = sizeof sc->sc_rxtapu; sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len); sc->sc_rxtap.wr_ihdr.it_present = htole32(WPI_RX_RADIOTAP_PRESENT); sc->sc_txtap_len = sizeof sc->sc_txtapu; sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len); sc->sc_txtap.wt_ihdr.it_present = htole32(WPI_TX_RADIOTAP_PRESENT); #endif } void wpi_power(int why, void *arg) { struct wpi_softc *sc = arg; struct ifnet *ifp; pcireg_t data; int s; if (why != PWR_RESUME) return; /* clear device specific PCI configuration register 0x41 */ data = pci_conf_read(sc->sc_pct, sc->sc_pcitag, 0x40); data &= ~0x0000ff00; pci_conf_write(sc->sc_pct, sc->sc_pcitag, 0x40, data); s = splnet(); ifp = &sc->sc_ic.ic_if; if (ifp->if_flags & IFF_UP) { ifp->if_init(ifp); if (ifp->if_flags & IFF_RUNNING) ifp->if_start(ifp); } splx(s); } int wpi_dma_contig_alloc(bus_dma_tag_t tag, struct wpi_dma_info *dma, void **kvap, bus_size_t size, bus_size_t alignment, int flags) { int nsegs, error; dma->tag = tag; dma->size = size; error = bus_dmamap_create(tag, size, 1, size, 0, flags, &dma->map); if (error != 0) goto fail; error = bus_dmamem_alloc(tag, size, alignment, 0, &dma->seg, 1, &nsegs, flags); if (error != 0) goto fail; error = bus_dmamem_map(tag, &dma->seg, 1, size, &dma->vaddr, flags); if (error != 0) goto fail; error = bus_dmamap_load_raw(tag, dma->map, &dma->seg, 1, size, flags); if (error != 0) goto fail; memset(dma->vaddr, 0, size); dma->paddr = dma->map->dm_segs[0].ds_addr; if (kvap != NULL) *kvap = dma->vaddr; return 0; fail: wpi_dma_contig_free(dma); return error; } void wpi_dma_contig_free(struct wpi_dma_info *dma) { if (dma->map != NULL) { if (dma->vaddr != NULL) { bus_dmamap_unload(dma->tag, dma->map); bus_dmamem_unmap(dma->tag, dma->vaddr, dma->size); bus_dmamem_free(dma->tag, &dma->seg, 1); dma->vaddr = NULL; } bus_dmamap_destroy(dma->tag, dma->map); dma->map = NULL; } } /* * Allocate a shared page between host and NIC. */ int wpi_alloc_shared(struct wpi_softc *sc) { /* must be aligned on a 4K-page boundary */ return wpi_dma_contig_alloc(sc->sc_dmat, &sc->shared_dma, (void **)&sc->shared, sizeof (struct wpi_shared), PAGE_SIZE, BUS_DMA_NOWAIT); } void wpi_free_shared(struct wpi_softc *sc) { wpi_dma_contig_free(&sc->shared_dma); } /* * Allocate DMA-safe memory for firmware transfer. */ int wpi_alloc_fwmem(struct wpi_softc *sc) { /* allocate enough contiguous space to store text and data */ return wpi_dma_contig_alloc(sc->sc_dmat, &sc->fw_dma, NULL, WPI_FW_MAIN_TEXT_MAXSZ + WPI_FW_MAIN_DATA_MAXSZ, 0, BUS_DMA_NOWAIT); } void wpi_free_fwmem(struct wpi_softc *sc) { wpi_dma_contig_free(&sc->fw_dma); } struct wpi_rbuf * wpi_alloc_rbuf(struct wpi_softc *sc) { struct wpi_rbuf *rbuf; rbuf = SLIST_FIRST(&sc->rxq.freelist); if (rbuf == NULL) return NULL; SLIST_REMOVE_HEAD(&sc->rxq.freelist, next); return rbuf; } /* * This is called automatically by the network stack when the mbuf to which our * Rx buffer is attached is freed. */ void wpi_free_rbuf(caddr_t buf, u_int size, void *arg) { struct wpi_rbuf *rbuf = arg; struct wpi_softc *sc = rbuf->sc; /* put the buffer back in the free list */ SLIST_INSERT_HEAD(&sc->rxq.freelist, rbuf, next); } int wpi_alloc_rpool(struct wpi_softc *sc) { struct wpi_rx_ring *ring = &sc->rxq; int i, error; /* allocate a big chunk of DMA'able memory.. */ error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->buf_dma, NULL, WPI_RBUF_COUNT * WPI_RBUF_SIZE, PAGE_SIZE, BUS_DMA_NOWAIT); if (error != 0) { printf("%s: could not allocate Rx buffers DMA memory\n", sc->sc_dev.dv_xname); return error; } /* ..and split it into 3KB chunks */ SLIST_INIT(&ring->freelist); for (i = 0; i < WPI_RBUF_COUNT; i++) { struct wpi_rbuf *rbuf = &ring->rbuf[i]; rbuf->sc = sc; /* backpointer for callbacks */ rbuf->vaddr = ring->buf_dma.vaddr + i * WPI_RBUF_SIZE; rbuf->paddr = ring->buf_dma.paddr + i * WPI_RBUF_SIZE; SLIST_INSERT_HEAD(&ring->freelist, rbuf, next); } return 0; } void wpi_free_rpool(struct wpi_softc *sc) { wpi_dma_contig_free(&sc->rxq.buf_dma); } int wpi_alloc_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) { int i, error; ring->cur = 0; error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->desc_dma, (void **)&ring->desc, WPI_RX_RING_COUNT * sizeof (uint32_t), WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT); if (error != 0) { printf("%s: could not allocate rx ring DMA memory\n", sc->sc_dev.dv_xname); goto fail; } /* * Setup Rx buffers. */ for (i = 0; i < WPI_RX_RING_COUNT; i++) { struct wpi_rx_data *data = &ring->data[i]; struct wpi_rbuf *rbuf; MGETHDR(data->m, M_DONTWAIT, MT_DATA); if (data->m == NULL) { printf("%s: could not allocate rx mbuf\n", sc->sc_dev.dv_xname); error = ENOMEM; goto fail; } if ((rbuf = wpi_alloc_rbuf(sc)) == NULL) { m_freem(data->m); data->m = NULL; printf("%s: could not allocate rx buffer\n", sc->sc_dev.dv_xname); error = ENOMEM; goto fail; } /* attach Rx buffer to mbuf */ MEXTADD(data->m, rbuf->vaddr, WPI_RBUF_SIZE, 0, wpi_free_rbuf, rbuf); ring->desc[i] = htole32(rbuf->paddr); } return 0; fail: wpi_free_rx_ring(sc, ring); return error; } void wpi_reset_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) { int ntries; wpi_mem_lock(sc); WPI_WRITE(sc, WPI_RX_CONFIG, 0); for (ntries = 0; ntries < 100; ntries++) { if (WPI_READ(sc, WPI_RX_STATUS) & WPI_RX_IDLE) break; DELAY(10); } #ifdef WPI_DEBUG if (ntries == 100 && wpi_debug > 0) printf("%s: timeout resetting Rx ring\n", sc->sc_dev.dv_xname); #endif wpi_mem_unlock(sc); ring->cur = 0; } void wpi_free_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) { int i; wpi_dma_contig_free(&ring->desc_dma); for (i = 0; i < WPI_RX_RING_COUNT; i++) { if (ring->data[i].m != NULL) m_freem(ring->data[i].m); } } int wpi_alloc_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring, int qid) { bus_size_t size; int i, error; ring->qid = qid; ring->queued = 0; ring->cur = 0; size = WPI_TX_RING_COUNT * sizeof (struct wpi_tx_desc); error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->desc_dma, (void **)&ring->desc, size, WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT); if (error != 0) { printf("%s: could not allocate tx ring DMA memory\n", sc->sc_dev.dv_xname); goto fail; } /* update shared page with ring's base address */ sc->shared->txbase[qid] = htole32(ring->desc_dma.paddr); size = WPI_TX_RING_COUNT * sizeof (struct wpi_tx_cmd); error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->cmd_dma, (void **)&ring->cmd, size, 4, BUS_DMA_NOWAIT); if (error != 0) { printf("%s: could not allocate tx cmd DMA memory\n", sc->sc_dev.dv_xname); goto fail; } for (i = 0; i < WPI_TX_RING_COUNT; i++) { struct wpi_tx_data *data = &ring->data[i]; error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, WPI_MAX_SCATTER - 1, MCLBYTES, 0, BUS_DMA_NOWAIT, &data->map); if (error != 0) { printf("%s: could not create tx buf DMA map\n", sc->sc_dev.dv_xname); goto fail; } } return 0; fail: wpi_free_tx_ring(sc, ring); return error; } void wpi_reset_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring) { uint32_t tmp; int i, ntries; wpi_mem_lock(sc); WPI_WRITE(sc, WPI_TX_CONFIG(ring->qid), 0); for (ntries = 0; ntries < 100; ntries++) { tmp = WPI_READ(sc, WPI_TX_STATUS); if ((tmp & WPI_TX_IDLE(ring->qid)) == WPI_TX_IDLE(ring->qid)) break; DELAY(10); } #ifdef WPI_DEBUG if (ntries == 100 && wpi_debug > 0) { printf("%s: timeout resetting Tx ring %d\n", sc->sc_dev.dv_xname, ring->qid); } #endif wpi_mem_unlock(sc); for (i = 0; i < WPI_TX_RING_COUNT; i++) { struct wpi_tx_data *data = &ring->data[i]; if (data->m != NULL) { bus_dmamap_unload(sc->sc_dmat, data->map); m_freem(data->m); data->m = NULL; } } ring->queued = 0; ring->cur = 0; } void wpi_free_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring) { int i; wpi_dma_contig_free(&ring->desc_dma); wpi_dma_contig_free(&ring->cmd_dma); for (i = 0; i < WPI_TX_RING_COUNT; i++) { struct wpi_tx_data *data = &ring->data[i]; if (data->m != NULL) { bus_dmamap_unload(sc->sc_dmat, data->map); m_freem(data->m); } } } struct ieee80211_node * wpi_node_alloc(struct ieee80211com *ic) { return malloc(sizeof (struct wpi_node), M_DEVBUF, M_NOWAIT | M_ZERO); } void wpi_newassoc(struct ieee80211com *ic, struct ieee80211_node *ni, int isnew) { struct wpi_softc *sc = ic->ic_if.if_softc; int i; ieee80211_amrr_node_init(&sc->amrr, &((struct wpi_node *)ni)->amn); /* set rate to some reasonable initial value */ for (i = ni->ni_rates.rs_nrates - 1; i > 0 && (ni->ni_rates.rs_rates[i] & IEEE80211_RATE_VAL) > 72; i--); ni->ni_txrate = i; } int wpi_media_change(struct ifnet *ifp) { int error; error = ieee80211_media_change(ifp); if (error != ENETRESET) return error; if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) == (IFF_UP | IFF_RUNNING)) { wpi_stop(ifp, 0); wpi_init(ifp); } return 0; } int wpi_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) { struct ifnet *ifp = &ic->ic_if; struct wpi_softc *sc = ifp->if_softc; struct ieee80211_node *ni; int error; timeout_del(&sc->calib_to); switch (nstate) { case IEEE80211_S_SCAN: /* make the link LED blink while we're scanning */ wpi_set_led(sc, WPI_LED_LINK, 20, 2); if ((error = wpi_scan(sc, IEEE80211_CHAN_G)) != 0) { printf("%s: could not initiate scan\n", sc->sc_dev.dv_xname); return error; } ic->ic_state = nstate; return 0; case IEEE80211_S_ASSOC: if (ic->ic_state != IEEE80211_S_RUN) break; /* FALLTHROUGH */ case IEEE80211_S_AUTH: /* reset state to handle reassociations correctly */ sc->config.associd = 0; sc->config.filter &= ~htole32(WPI_FILTER_BSS); if ((error = wpi_auth(sc)) != 0) { printf("%s: could not send authentication request\n", sc->sc_dev.dv_xname); return error; } break; case IEEE80211_S_RUN: if (ic->ic_opmode == IEEE80211_M_MONITOR) { /* link LED blinks while monitoring */ wpi_set_led(sc, WPI_LED_LINK, 5, 5); break; } ni = ic->ic_bss; wpi_enable_tsf(sc, ni); /* update adapter's configuration */ sc->config.associd = htole16(ni->ni_associd & ~0xc000); /* short preamble/slot time are negotiated when associating */ sc->config.flags &= ~htole32(WPI_CONFIG_SHPREAMBLE | WPI_CONFIG_SHSLOT); if (ic->ic_flags & IEEE80211_F_SHSLOT) sc->config.flags |= htole32(WPI_CONFIG_SHSLOT); if (ic->ic_flags & IEEE80211_F_SHPREAMBLE) sc->config.flags |= htole32(WPI_CONFIG_SHPREAMBLE); sc->config.filter |= htole32(WPI_FILTER_BSS); DPRINTF(("config chan %d flags %x\n", sc->config.chan, sc->config.flags)); error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, sizeof (struct wpi_config), 1); if (error != 0) { printf("%s: could not update configuration\n", sc->sc_dev.dv_xname); return error; } /* configuration has changed, set Tx power accordingly */ if ((error = wpi_set_txpower(sc, ni->ni_chan, 1)) != 0) { printf("%s: could not set Tx power\n", sc->sc_dev.dv_xname); return error; } if (ic->ic_opmode == IEEE80211_M_STA) { /* fake a join to init the tx rate */ wpi_newassoc(ic, ni, 1); } /* start periodic calibration timer */ sc->calib_cnt = 0; timeout_add(&sc->calib_to, hz / 2); /* link LED always on while associated */ wpi_set_led(sc, WPI_LED_LINK, 0, 1); break; case IEEE80211_S_INIT: break; } return sc->sc_newstate(ic, nstate, arg); } /* * Grab exclusive access to NIC memory. */ void wpi_mem_lock(struct wpi_softc *sc) { uint32_t tmp; int ntries; tmp = WPI_READ(sc, WPI_GPIO_CTL); WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_MAC); /* spin until we actually get the lock */ for (ntries = 0; ntries < 1000; ntries++) { if ((WPI_READ(sc, WPI_GPIO_CTL) & (WPI_GPIO_CLOCK | WPI_GPIO_SLEEP)) == WPI_GPIO_CLOCK) break; DELAY(10); } if (ntries == 1000) printf("%s: could not lock memory\n", sc->sc_dev.dv_xname); } /* * Release lock on NIC memory. */ void wpi_mem_unlock(struct wpi_softc *sc) { uint32_t tmp = WPI_READ(sc, WPI_GPIO_CTL); WPI_WRITE(sc, WPI_GPIO_CTL, tmp & ~WPI_GPIO_MAC); } uint32_t wpi_mem_read(struct wpi_softc *sc, uint16_t addr) { WPI_WRITE(sc, WPI_READ_MEM_ADDR, WPI_MEM_4 | addr); return WPI_READ(sc, WPI_READ_MEM_DATA); } void wpi_mem_write(struct wpi_softc *sc, uint16_t addr, uint32_t data) { WPI_WRITE(sc, WPI_WRITE_MEM_ADDR, WPI_MEM_4 | addr); WPI_WRITE(sc, WPI_WRITE_MEM_DATA, data); } void wpi_mem_write_region_4(struct wpi_softc *sc, uint16_t addr, const uint32_t *data, int wlen) { for (; wlen > 0; wlen--, data++, addr += 4) wpi_mem_write(sc, addr, *data); } /* * Read `len' bytes from the EEPROM. We access the EEPROM through the MAC * instead of using the traditional bit-bang method. */ int wpi_read_prom_data(struct wpi_softc *sc, uint32_t addr, void *data, int len) { uint8_t *out = data; uint32_t val; int ntries; wpi_mem_lock(sc); for (; len > 0; len -= 2, addr++) { WPI_WRITE(sc, WPI_EEPROM_CTL, addr << 2); for (ntries = 0; ntries < 10; ntries++) { if ((val = WPI_READ(sc, WPI_EEPROM_CTL)) & WPI_EEPROM_READY) break; DELAY(5); } if (ntries == 10) { printf("%s: could not read EEPROM\n", sc->sc_dev.dv_xname); return ETIMEDOUT; } *out++ = val >> 16; if (len > 1) *out++ = val >> 24; } wpi_mem_unlock(sc); return 0; } /* * The firmware boot code is small and is intended to be copied directly into * the NIC internal memory. */ int wpi_load_microcode(struct wpi_softc *sc, const uint8_t *ucode, int size) { int ntries; size /= sizeof (uint32_t); wpi_mem_lock(sc); /* copy microcode image into NIC memory */ wpi_mem_write_region_4(sc, WPI_MEM_UCODE_BASE, (const uint32_t *)ucode, size); wpi_mem_write(sc, WPI_MEM_UCODE_SRC, 0); wpi_mem_write(sc, WPI_MEM_UCODE_DST, WPI_FW_TEXT); wpi_mem_write(sc, WPI_MEM_UCODE_SIZE, size); /* run microcode */ wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_RUN); /* wait for transfer to complete */ for (ntries = 0; ntries < 1000; ntries++) { if (!(wpi_mem_read(sc, WPI_MEM_UCODE_CTL) & WPI_UC_RUN)) break; DELAY(10); } if (ntries == 1000) { wpi_mem_unlock(sc); printf("%s: could not load boot firmware\n", sc->sc_dev.dv_xname); return ETIMEDOUT; } wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_ENABLE); wpi_mem_unlock(sc); return 0; } int wpi_load_firmware(struct wpi_softc *sc) { struct wpi_dma_info *dma = &sc->fw_dma; const struct wpi_firmware_hdr *hdr; const uint8_t *init_text, *init_data, *main_text, *main_data; const uint8_t *boot_text; uint32_t init_textsz, init_datasz, main_textsz, main_datasz; uint32_t boot_textsz; u_char *fw; size_t size; int error; /* load firmware image from disk */ if ((error = loadfirmware("wpi-3945abg", &fw, &size)) != 0) { printf("%s: error, %d, could not read firmware %s\n", sc->sc_dev.dv_xname, error, "wpi-3945abg"); goto fail1; } /* extract firmware header information */ if (size < sizeof (struct wpi_firmware_hdr)) { printf("%s: truncated firmware header: %d bytes\n", sc->sc_dev.dv_xname, size); error = EINVAL; goto fail2; } hdr = (const struct wpi_firmware_hdr *)fw; main_textsz = letoh32(hdr->main_textsz); main_datasz = letoh32(hdr->main_datasz); init_textsz = letoh32(hdr->init_textsz); init_datasz = letoh32(hdr->init_datasz); boot_textsz = letoh32(hdr->boot_textsz); /* sanity-check firmware segments sizes */ if (main_textsz > WPI_FW_MAIN_TEXT_MAXSZ || main_datasz > WPI_FW_MAIN_DATA_MAXSZ || init_textsz > WPI_FW_INIT_TEXT_MAXSZ || init_datasz > WPI_FW_INIT_DATA_MAXSZ || boot_textsz > WPI_FW_BOOT_TEXT_MAXSZ || (boot_textsz & 3) != 0) { printf("%s: invalid firmware header\n", sc->sc_dev.dv_xname); error = EINVAL; goto fail2; } /* check that all firmware segments are present */ if (size < sizeof (struct wpi_firmware_hdr) + main_textsz + main_datasz + init_textsz + init_datasz + boot_textsz) { printf("%s: firmware file too short: %d bytes\n", sc->sc_dev.dv_xname, size); error = EINVAL; goto fail2; } /* get pointers to firmware segments */ main_text = (const uint8_t *)(hdr + 1); main_data = main_text + main_textsz; init_text = main_data + main_datasz; init_data = init_text + init_textsz; boot_text = init_data + init_datasz; /* copy initialization images into pre-allocated DMA-safe memory */ memcpy(dma->vaddr, init_data, init_datasz); memcpy(dma->vaddr + WPI_FW_INIT_DATA_MAXSZ, init_text, init_textsz); /* tell adapter where to find initialization images */ wpi_mem_lock(sc); wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr); wpi_mem_write(sc, WPI_MEM_DATA_SIZE, init_datasz); wpi_mem_write(sc, WPI_MEM_TEXT_BASE, dma->paddr + WPI_FW_INIT_DATA_MAXSZ); wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, init_textsz); wpi_mem_unlock(sc); /* load firmware boot code */ if ((error = wpi_load_microcode(sc, boot_text, boot_textsz)) != 0) { printf("%s: could not load boot firmware\n", sc->sc_dev.dv_xname); goto fail2; } /* now press "execute" ;-) */ WPI_WRITE(sc, WPI_RESET, 0); /* wait at most one second for first alive notification */ if ((error = tsleep(sc, PCATCH, "wpiinit", hz)) != 0) { /* this isn't what was supposed to happen.. */ printf("%s: timeout waiting for adapter to initialize\n", sc->sc_dev.dv_xname); goto fail2; } /* copy runtime images into pre-allocated DMA-safe memory */ memcpy(dma->vaddr, main_data, main_datasz); memcpy(dma->vaddr + WPI_FW_MAIN_DATA_MAXSZ, main_text, main_textsz); /* tell adapter where to find runtime images */ wpi_mem_lock(sc); wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr); wpi_mem_write(sc, WPI_MEM_DATA_SIZE, main_datasz); wpi_mem_write(sc, WPI_MEM_TEXT_BASE, dma->paddr + WPI_FW_MAIN_DATA_MAXSZ); wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, WPI_FW_UPDATED | main_textsz); wpi_mem_unlock(sc); /* wait at most one second for second alive notification */ if ((error = tsleep(sc, PCATCH, "wpiinit", hz)) != 0) { /* this isn't what was supposed to happen.. */ printf("%s: timeout waiting for adapter to initialize\n", sc->sc_dev.dv_xname); } fail2: free(fw, M_DEVBUF); fail1: return error; } void wpi_calib_timeout(void *arg) { struct wpi_softc *sc = arg; struct ieee80211com *ic = &sc->sc_ic; int temp, s; /* automatic rate control triggered every 500ms */ if (ic->ic_fixed_rate == -1) { s = splnet(); if (ic->ic_opmode == IEEE80211_M_STA) wpi_iter_func(sc, ic->ic_bss); else ieee80211_iterate_nodes(ic, wpi_iter_func, sc); splx(s); } /* update sensor data */ temp = (int)WPI_READ(sc, WPI_TEMPERATURE); sc->sensor.value = temp + 260; /* automatic power calibration every 60s */ if (++sc->calib_cnt >= 120) { wpi_power_calibration(sc, temp); sc->calib_cnt = 0; } timeout_add(&sc->calib_to, hz / 2); } void wpi_iter_func(void *arg, struct ieee80211_node *ni) { struct wpi_softc *sc = arg; struct wpi_node *wn = (struct wpi_node *)ni; ieee80211_amrr_choose(&sc->amrr, ni, &wn->amn); } /* * This function is called periodically (every 60 seconds) to adjust output * power to temperature changes. */ void wpi_power_calibration(struct wpi_softc *sc, int temp) { /* sanity-check read value */ if (temp < -260 || temp > 25) { /* this can't be correct, ignore */ DPRINTF(("out-of-range temperature reported: %d\n", temp)); return; } DPRINTF(("temperature %d->%d\n", sc->temp, temp)); /* adjust Tx power if need be */ if (abs(temp - sc->temp) <= 6) return; sc->temp = temp; if (wpi_set_txpower(sc, sc->sc_ic.ic_bss->ni_chan, 1) != 0) { /* just warn, too bad for the automatic calibration... */ printf("%s: could not adjust Tx power\n", sc->sc_dev.dv_xname); } } void wpi_rx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc, struct wpi_rx_data *data) { struct ieee80211com *ic = &sc->sc_ic; struct ifnet *ifp = &ic->ic_if; struct wpi_rx_ring *ring = &sc->rxq; struct wpi_rx_stat *stat; struct wpi_rx_head *head; struct wpi_rx_tail *tail; struct wpi_rbuf *rbuf; struct ieee80211_frame *wh; struct ieee80211_node *ni; struct mbuf *m, *mnew; stat = (struct wpi_rx_stat *)(desc + 1); if (stat->len > WPI_STAT_MAXLEN) { printf("%s: invalid rx statistic header\n", sc->sc_dev.dv_xname); ifp->if_ierrors++; return; } head = (struct wpi_rx_head *)((caddr_t)(stat + 1) + stat->len); tail = (struct wpi_rx_tail *)((caddr_t)(head + 1) + letoh16(head->len)); DPRINTFN(4, ("rx intr: idx=%d len=%d stat len=%d rssi=%d rate=%x " "chan=%d tstamp=%llu\n", ring->cur, letoh32(desc->len), letoh16(head->len), (int8_t)stat->rssi, head->rate, head->chan, letoh64(tail->tstamp))); /* * Discard Rx frames with bad CRC early (XXX we may want to pass them * to radiotap in monitor mode). */ if ((letoh32(tail->flags) & WPI_RX_NOERROR) != WPI_RX_NOERROR) { DPRINTFN(2, ("rx tail flags error %x\n", letoh32(tail->flags))); ifp->if_ierrors++; return; } m = data->m; /* finalize mbuf */ m->m_pkthdr.rcvif = ifp; m->m_data = (caddr_t)(head + 1); m->m_pkthdr.len = m->m_len = letoh16(head->len); if ((rbuf = SLIST_FIRST(&sc->rxq.freelist)) != NULL) { MGETHDR(mnew, M_DONTWAIT, MT_DATA); if (mnew == NULL) { ifp->if_ierrors++; return; } /* attach Rx buffer to mbuf */ MEXTADD(mnew, rbuf->vaddr, WPI_RBUF_SIZE, 0, wpi_free_rbuf, rbuf); SLIST_REMOVE_HEAD(&sc->rxq.freelist, next); data->m = mnew; /* update Rx descriptor */ ring->desc[ring->cur] = htole32(rbuf->paddr); } else { /* no free rbufs, copy frame */ m = m_copym2(m, 0, M_COPYALL, M_DONTWAIT); if (m == NULL) { /* no free mbufs either, drop frame */ ifp->if_ierrors++; return; } } #if NBPFILTER > 0 if (sc->sc_drvbpf != NULL) { struct mbuf mb; struct wpi_rx_radiotap_header *tap = &sc->sc_rxtap; tap->wr_flags = 0; tap->wr_chan_freq = htole16(ic->ic_channels[head->chan].ic_freq); tap->wr_chan_flags = htole16(ic->ic_channels[head->chan].ic_flags); tap->wr_dbm_antsignal = (int8_t)(stat->rssi - WPI_RSSI_OFFSET); tap->wr_dbm_antnoise = (int8_t)letoh16(stat->noise); tap->wr_tsft = tail->tstamp; tap->wr_antenna = (letoh16(head->flags) >> 4) & 0xf; switch (head->rate) { /* CCK rates */ case 10: tap->wr_rate = 2; break; case 20: tap->wr_rate = 4; break; case 55: tap->wr_rate = 11; break; case 110: tap->wr_rate = 22; break; /* OFDM rates */ case 0xd: tap->wr_rate = 12; break; case 0xf: tap->wr_rate = 18; break; case 0x5: tap->wr_rate = 24; break; case 0x7: tap->wr_rate = 36; break; case 0x9: tap->wr_rate = 48; break; case 0xb: tap->wr_rate = 72; break; case 0x1: tap->wr_rate = 96; break; case 0x3: tap->wr_rate = 108; break; /* unknown rate: should not happen */ default: tap->wr_rate = 0; } if (letoh16(head->flags) & 0x4) tap->wr_flags |= IEEE80211_RADIOTAP_F_SHORTPRE; mb.m_data = (caddr_t)tap; mb.m_len = sc->sc_rxtap_len; mb.m_next = m; mb.m_nextpkt = NULL; mb.m_type = 0; mb.m_flags = 0; bpf_mtap(sc->sc_drvbpf, &mb, BPF_DIRECTION_IN); } #endif /* grab a reference to the source node */ wh = mtod(m, struct ieee80211_frame *); ni = ieee80211_find_rxnode(ic, wh); /* send the frame to the 802.11 layer */ ieee80211_input(ifp, m, ni, stat->rssi, 0); /* node is no longer needed */ ieee80211_release_node(ic, ni); } void wpi_tx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc) { struct ieee80211com *ic = &sc->sc_ic; struct ifnet *ifp = &ic->ic_if; struct wpi_tx_ring *ring = &sc->txq[desc->qid & 0x3]; struct wpi_tx_data *data = &ring->data[desc->idx]; struct wpi_tx_stat *stat = (struct wpi_tx_stat *)(desc + 1); struct wpi_node *wn = (struct wpi_node *)data->ni; DPRINTFN(4, ("tx done: qid=%d idx=%d retries=%d nkill=%d rate=%x " "duration=%d status=%x\n", desc->qid, desc->idx, stat->ntries, stat->nkill, stat->rate, letoh32(stat->duration), letoh32(stat->status))); /* * Update rate control statistics for the node. * XXX we should not count mgmt frames since they're always sent at * the lowest available bit-rate. */ wn->amn.amn_txcnt++; if (stat->ntries > 0) { DPRINTFN(3, ("tx intr ntries %d\n", stat->ntries)); wn->amn.amn_retrycnt++; } if ((letoh32(stat->status) & 0xff) != 1) ifp->if_oerrors++; else ifp->if_opackets++; bus_dmamap_unload(sc->sc_dmat, data->map); m_freem(data->m); data->m = NULL; ieee80211_release_node(ic, data->ni); data->ni = NULL; ring->queued--; sc->sc_tx_timer = 0; ifp->if_flags &= ~IFF_OACTIVE; (*ifp->if_start)(ifp); } void wpi_cmd_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc) { struct wpi_tx_ring *ring = &sc->txq[4]; struct wpi_tx_data *data; if ((desc->qid & 7) != 4) return; /* not a command ack */ data = &ring->data[desc->idx]; /* if the command was mapped in a mbuf, free it */ if (data->m != NULL) { bus_dmamap_unload(sc->sc_dmat, data->map); m_freem(data->m); data->m = NULL; } wakeup(&ring->cmd[desc->idx]); } void wpi_notif_intr(struct wpi_softc *sc) { struct ieee80211com *ic = &sc->sc_ic; struct ifnet *ifp = &ic->ic_if; uint32_t hw; hw = letoh32(sc->shared->next); while (sc->rxq.cur != hw) { struct wpi_rx_data *data = &sc->rxq.data[sc->rxq.cur]; struct wpi_rx_desc *desc = (void *)data->m->m_ext.ext_buf; DPRINTFN(4, ("rx notification qid=%x idx=%d flags=%x type=%d " "len=%d\n", desc->qid, desc->idx, desc->flags, desc->type, letoh32(desc->len))); if (!(desc->qid & 0x80)) /* reply to a command */ wpi_cmd_intr(sc, desc); switch (desc->type) { case WPI_RX_DONE: /* a 802.11 frame was received */ wpi_rx_intr(sc, desc, data); break; case WPI_TX_DONE: /* a 802.11 frame has been transmitted */ wpi_tx_intr(sc, desc); break; case WPI_UC_READY: { struct wpi_ucode_info *uc = (struct wpi_ucode_info *)(desc + 1); /* the microcontroller is ready */ DPRINTF(("microcode alive notification version %x " "alive %x\n", letoh32(uc->version), letoh32(uc->valid))); if (letoh32(uc->valid) != 1) { printf("%s: microcontroller initialization " "failed\n", sc->sc_dev.dv_xname); } break; } case WPI_STATE_CHANGED: { uint32_t *status = (uint32_t *)(desc + 1); /* enabled/disabled notification */ DPRINTF(("state changed to %x\n", letoh32(*status))); if (letoh32(*status) & 1) { /* the radio button has to be pushed */ printf("%s: Radio transmitter is off\n", sc->sc_dev.dv_xname); /* turn the interface down */ ifp->if_flags &= ~IFF_UP; wpi_stop(ifp, 1); return; /* no further processing */ } break; } case WPI_START_SCAN: { struct wpi_start_scan *scan = (struct wpi_start_scan *)(desc + 1); DPRINTFN(2, ("scanning channel %d status %x\n", scan->chan, letoh32(scan->status))); /* fix current channel */ ic->ic_bss->ni_chan = &ic->ic_channels[scan->chan]; break; } case WPI_STOP_SCAN: { struct wpi_stop_scan *scan = (struct wpi_stop_scan *)(desc + 1); DPRINTF(("scan finished nchan=%d status=%d chan=%d\n", scan->nchan, scan->status, scan->chan)); if (scan->status == 1 && scan->chan <= 14) { /* * We just finished scanning 802.11g channels, * start scanning 802.11a ones. */ if (wpi_scan(sc, IEEE80211_CHAN_A) == 0) break; } ieee80211_end_scan(ifp); break; } } sc->rxq.cur = (sc->rxq.cur + 1) % WPI_RX_RING_COUNT; } /* tell the firmware what we have processed */ hw = (hw == 0) ? WPI_RX_RING_COUNT - 1 : hw - 1; WPI_WRITE(sc, WPI_RX_WIDX, hw & ~7); } int wpi_intr(void *arg) { struct wpi_softc *sc = arg; struct ifnet *ifp = &sc->sc_ic.ic_if; uint32_t r; r = WPI_READ(sc, WPI_INTR); if (r == 0 || r == 0xffffffff) return 0; /* not for us */ DPRINTFN(6, ("interrupt reg %x\n", r)); /* disable interrupts */ WPI_WRITE(sc, WPI_MASK, 0); /* ack interrupts */ WPI_WRITE(sc, WPI_INTR, r); if (r & (WPI_SW_ERROR | WPI_HW_ERROR)) { /* SYSTEM FAILURE, SYSTEM FAILURE */ printf("%s: fatal firmware error\n", sc->sc_dev.dv_xname); ifp->if_flags &= ~IFF_UP; wpi_stop(ifp, 1); return 1; } if (r & WPI_RX_INTR) wpi_notif_intr(sc); if (r & WPI_ALIVE_INTR) /* firmware initialized */ wakeup(sc); /* re-enable interrupts */ if (ifp->if_flags & IFF_UP) WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK); return 1; } uint8_t wpi_plcp_signal(int rate) { switch (rate) { /* CCK rates (returned values are device-dependent) */ case 2: return 10; case 4: return 20; case 11: return 55; case 22: return 110; /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ /* R1-R4, (u)ral is R4-R1 */ case 12: return 0xd; case 18: return 0xf; case 24: return 0x5; case 36: return 0x7; case 48: return 0x9; case 72: return 0xb; case 96: return 0x1; case 108: return 0x3; /* unsupported rates (should not get there) */ default: return 0; } } /* quickly determine if a given rate is CCK or OFDM */ #define WPI_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22) int wpi_tx_data(struct wpi_softc *sc, struct mbuf *m0, struct ieee80211_node *ni, int ac) { struct ieee80211com *ic = &sc->sc_ic; struct wpi_tx_ring *ring = &sc->txq[ac]; struct wpi_tx_desc *desc; struct wpi_tx_data *data; struct wpi_tx_cmd *cmd; struct wpi_cmd_data *tx; struct ieee80211_frame *wh; struct mbuf *mnew; u_int hdrlen; int i, rate, error, ovhd = 0; desc = &ring->desc[ring->cur]; data = &ring->data[ring->cur]; wh = mtod(m0, struct ieee80211_frame *); hdrlen = ieee80211_get_hdrlen(wh); /* pickup a rate */ if (IEEE80211_IS_MULTICAST(wh->i_addr1) || ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_MGT)) { /* mgmt/multicast frames are sent at the lowest avail. rate */ rate = ni->ni_rates.rs_rates[0]; } else if (ic->ic_fixed_rate != -1) { rate = ic->ic_sup_rates[ic->ic_curmode]. rs_rates[ic->ic_fixed_rate]; } else rate = ni->ni_rates.rs_rates[ni->ni_txrate]; rate &= IEEE80211_RATE_VAL; #if NBPFILTER > 0 if (sc->sc_drvbpf != NULL) { struct mbuf mb; struct wpi_tx_radiotap_header *tap = &sc->sc_txtap; tap->wt_flags = 0; tap->wt_chan_freq = htole16(ni->ni_chan->ic_freq); tap->wt_chan_flags = htole16(ni->ni_chan->ic_flags); tap->wt_rate = rate; tap->wt_hwqueue = ac; if (wh->i_fc[1] & IEEE80211_FC1_WEP) tap->wt_flags |= IEEE80211_RADIOTAP_F_WEP; mb.m_data = (caddr_t)tap; mb.m_len = sc->sc_txtap_len; mb.m_next = m0; mb.m_nextpkt = NULL; mb.m_type = 0; mb.m_flags = 0; bpf_mtap(sc->sc_drvbpf, &mb, BPF_DIRECTION_OUT); } #endif cmd = &ring->cmd[ring->cur]; cmd->code = WPI_CMD_TX_DATA; cmd->flags = 0; cmd->qid = ring->qid; cmd->idx = ring->cur; tx = (struct wpi_cmd_data *)cmd->data; /* no need to zero tx, all fields are reinitialized here */ tx->flags = 0; if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { const struct ieee80211_key *key = &ic->ic_nw_keys[ic->ic_wep_txkey]; if (key->k_cipher == IEEE80211_CIPHER_WEP40) tx->security = WPI_CIPHER_WEP40; else tx->security = WPI_CIPHER_WEP104; tx->security |= ic->ic_wep_txkey << 6; memcpy(&tx->key[3], key->k_key, key->k_len); /* compute crypto overhead */ ovhd = IEEE80211_WEP_TOTLEN; } else tx->security = 0; if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { tx->id = WPI_ID_BSS; tx->flags |= htole32(WPI_TX_NEED_ACK); } else tx->id = WPI_ID_BROADCAST; /* check if RTS/CTS or CTS-to-self protection must be used */ if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { /* multicast frames are not sent at OFDM rates in 802.11b/g */ if (m0->m_pkthdr.len + ovhd + IEEE80211_CRC_LEN > ic->ic_rtsthreshold) { tx->flags |= htole32(WPI_TX_NEED_RTS | WPI_TX_FULL_TXOP); } else if ((ic->ic_flags & IEEE80211_F_USEPROT) && WPI_RATE_IS_OFDM(rate)) { if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) { tx->flags |= htole32(WPI_TX_NEED_CTS | WPI_TX_FULL_TXOP); } else if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) { tx->flags |= htole32(WPI_TX_NEED_RTS | WPI_TX_FULL_TXOP); } } } tx->flags |= htole32(WPI_TX_AUTO_SEQ); if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_MGT) { uint8_t subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; /* tell h/w to set timestamp in probe responses */ if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) tx->flags |= htole32(WPI_TX_INSERT_TSTAMP); if (subtype == IEEE80211_FC0_SUBTYPE_ASSOC_REQ || subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) tx->timeout = htole16(3); else tx->timeout = htole16(2); } else tx->timeout = htole16(0); tx->len = htole16(m0->m_pkthdr.len); tx->rate = wpi_plcp_signal(rate); tx->rts_ntries = 7; tx->data_ntries = 15; tx->ofdm_mask = 0xff; tx->cck_mask = 0x0f; tx->lifetime = htole32(WPI_LIFETIME_INFINITE); /* copy and trim IEEE802.11 header */ memcpy((uint8_t *)(tx + 1), wh, hdrlen); m_adj(m0, hdrlen); error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0, BUS_DMA_NOWAIT); if (error != 0 && error != EFBIG) { printf("%s: could not map mbuf (error %d)\n", sc->sc_dev.dv_xname, error); m_freem(m0); return error; } if (error != 0) { /* too many fragments, linearize */ MGETHDR(mnew, M_DONTWAIT, MT_DATA); if (mnew == NULL) { m_freem(m0); return ENOMEM; } M_DUP_PKTHDR(mnew, m0); if (m0->m_pkthdr.len > MHLEN) { MCLGET(mnew, M_DONTWAIT); if (!(mnew->m_flags & M_EXT)) { m_freem(m0); m_freem(mnew); return ENOMEM; } } m_copydata(m0, 0, m0->m_pkthdr.len, mtod(mnew, caddr_t)); m_freem(m0); mnew->m_len = mnew->m_pkthdr.len; m0 = mnew; error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0, BUS_DMA_NOWAIT); if (error != 0) { printf("%s: could not map mbuf (error %d)\n", sc->sc_dev.dv_xname, error); m_freem(m0); return error; } } data->m = m0; data->ni = ni; DPRINTFN(4, ("sending data: qid=%d idx=%d len=%d nsegs=%d\n", ring->qid, ring->cur, m0->m_pkthdr.len, data->map->dm_nsegs)); /* first scatter/gather segment is used by the tx data command */ desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | (1 + data->map->dm_nsegs) << 24); desc->segs[0].addr = htole32(ring->cmd_dma.paddr + ring->cur * sizeof (struct wpi_tx_cmd)); desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_data) + ((hdrlen + 3) & ~3)); for (i = 1; i <= data->map->dm_nsegs; i++) { desc->segs[i].addr = htole32(data->map->dm_segs[i - 1].ds_addr); desc->segs[i].len = htole32(data->map->dm_segs[i - 1].ds_len); } ring->queued++; /* kick ring */ ring->cur = (ring->cur + 1) % WPI_TX_RING_COUNT; WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); return 0; } void wpi_start(struct ifnet *ifp) { struct wpi_softc *sc = ifp->if_softc; struct ieee80211com *ic = &sc->sc_ic; struct ieee80211_node *ni; struct mbuf *m0; /* * net80211 may still try to send management frames even if the * IFF_RUNNING flag is not set... */ if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) return; for (;;) { IF_POLL(&ic->ic_mgtq, m0); if (m0 != NULL) { /* management frames go into ring 0 */ if (sc->txq[0].queued >= WPI_TX_RING_COUNT - 8) { ifp->if_flags |= IFF_OACTIVE; break; } IF_DEQUEUE(&ic->ic_mgtq, m0); ni = (struct ieee80211_node *)m0->m_pkthdr.rcvif; m0->m_pkthdr.rcvif = NULL; #if NBPFILTER > 0 if (ic->ic_rawbpf != NULL) bpf_mtap(ic->ic_rawbpf, m0, BPF_DIRECTION_OUT); #endif if (wpi_tx_data(sc, m0, ni, 0) != 0) break; } else { if (ic->ic_state != IEEE80211_S_RUN) break; IFQ_POLL(&ifp->if_snd, m0); if (m0 == NULL) break; if (sc->txq[0].queued >= WPI_TX_RING_COUNT - 8) { /* there is no place left in this ring */ ifp->if_flags |= IFF_OACTIVE; break; } IFQ_DEQUEUE(&ifp->if_snd, m0); #if NBPFILTER > 0 if (ifp->if_bpf != NULL) bpf_mtap(ifp->if_bpf, m0, BPF_DIRECTION_OUT); #endif m0 = ieee80211_encap(ifp, m0, &ni); if (m0 == NULL) continue; #if NBPFILTER > 0 if (ic->ic_rawbpf != NULL) bpf_mtap(ic->ic_rawbpf, m0, BPF_DIRECTION_OUT); #endif if (wpi_tx_data(sc, m0, ni, 0) != 0) { if (ni != NULL) ieee80211_release_node(ic, ni); ifp->if_oerrors++; break; } } sc->sc_tx_timer = 5; ifp->if_timer = 1; } } void wpi_watchdog(struct ifnet *ifp) { struct wpi_softc *sc = ifp->if_softc; ifp->if_timer = 0; if (sc->sc_tx_timer > 0) { if (--sc->sc_tx_timer == 0) { printf("%s: device timeout\n", sc->sc_dev.dv_xname); ifp->if_flags &= ~IFF_UP; wpi_stop(ifp, 1); ifp->if_oerrors++; return; } ifp->if_timer = 1; } ieee80211_watchdog(ifp); } int wpi_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) { struct wpi_softc *sc = ifp->if_softc; struct ieee80211com *ic = &sc->sc_ic; struct ifaddr *ifa; struct ifreq *ifr; int s, error = 0; s = splnet(); switch (cmd) { case SIOCSIFADDR: ifa = (struct ifaddr *)data; ifp->if_flags |= IFF_UP; #ifdef INET if (ifa->ifa_addr->sa_family == AF_INET) arp_ifinit(&ic->ic_ac, ifa); #endif /* FALLTHROUGH */ case SIOCSIFFLAGS: if (ifp->if_flags & IFF_UP) { if (!(ifp->if_flags & IFF_RUNNING)) wpi_init(ifp); } else { if (ifp->if_flags & IFF_RUNNING) wpi_stop(ifp, 1); } break; case SIOCADDMULTI: case SIOCDELMULTI: ifr = (struct ifreq *)data; error = (cmd == SIOCADDMULTI) ? ether_addmulti(ifr, &ic->ic_ac) : ether_delmulti(ifr, &ic->ic_ac); if (error == ENETRESET) error = 0; break; default: error = ieee80211_ioctl(ifp, cmd, data); } if (error == ENETRESET) { if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) == (IFF_UP | IFF_RUNNING)) { wpi_stop(ifp, 0); wpi_init(ifp); } error = 0; } splx(s); return error; } void wpi_read_eeprom(struct wpi_softc *sc) { struct ieee80211com *ic = &sc->sc_ic; char domain[4]; int i; wpi_read_prom_data(sc, WPI_EEPROM_CAPABILITIES, &sc->cap, 1); wpi_read_prom_data(sc, WPI_EEPROM_REVISION, &sc->rev, 2); wpi_read_prom_data(sc, WPI_EEPROM_TYPE, &sc->type, 1); DPRINTF(("cap=%x rev=%x type=%x\n", sc->cap, letoh16(sc->rev), sc->type)); /* read and print regulatory domain */ wpi_read_prom_data(sc, WPI_EEPROM_DOMAIN, domain, 4); printf(", %.4s", domain); /* read and print MAC address */ wpi_read_prom_data(sc, WPI_EEPROM_MAC, ic->ic_myaddr, 6); printf(", address %s\n", ether_sprintf(ic->ic_myaddr)); /* read the list of authorized channels */ for (i = 0; i < WPI_CHAN_BANDS_COUNT; i++) wpi_read_eeprom_channels(sc, i); /* read the list of power groups */ for (i = 0; i < WPI_POWER_GROUPS_COUNT; i++) wpi_read_eeprom_group(sc, i); } void wpi_read_eeprom_channels(struct wpi_softc *sc, int n) { struct ieee80211com *ic = &sc->sc_ic; const struct wpi_chan_band *band = &wpi_bands[n]; struct wpi_eeprom_chan channels[WPI_MAX_CHAN_PER_BAND]; int chan, i; wpi_read_prom_data(sc, band->addr, channels, band->nchan * sizeof (struct wpi_eeprom_chan)); for (i = 0; i < band->nchan; i++) { if (!(channels[i].flags & WPI_EEPROM_CHAN_VALID)) continue; chan = band->chan[i]; if (n == 0) { /* 2GHz band */ ic->ic_channels[chan].ic_freq = ieee80211_ieee2mhz(chan, IEEE80211_CHAN_2GHZ); ic->ic_channels[chan].ic_flags = IEEE80211_CHAN_CCK | IEEE80211_CHAN_OFDM | IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; } else { /* 5GHz band */ /* * Some 3945ABG adapters support channels 7, 8, 11 * and 12 in the 2GHz *and* 5GHz bands. * Because of limitations in our net80211(9) stack, * we can't support these channels in 5GHz band. */ if (chan <= 14) continue; ic->ic_channels[chan].ic_freq = ieee80211_ieee2mhz(chan, IEEE80211_CHAN_5GHZ); ic->ic_channels[chan].ic_flags = IEEE80211_CHAN_A; } /* is active scan allowed on this channel? */ if (!(channels[i].flags & WPI_EEPROM_CHAN_ACTIVE)) { ic->ic_channels[chan].ic_flags |= IEEE80211_CHAN_PASSIVE; } /* save maximum allowed power for this channel */ sc->maxpwr[chan] = channels[i].maxpwr; DPRINTF(("adding chan %d flags=0x%x maxpwr=%d\n", chan, channels[i].flags, sc->maxpwr[chan])); } } void wpi_read_eeprom_group(struct wpi_softc *sc, int n) { struct wpi_power_group *group = &sc->groups[n]; struct wpi_eeprom_group rgroup; int i; wpi_read_prom_data(sc, WPI_EEPROM_POWER_GRP + n * 32, &rgroup, sizeof rgroup); /* save power group information */ group->chan = rgroup.chan; group->maxpwr = rgroup.maxpwr; /* temperature at which the samples were taken */ group->temp = (int16_t)letoh16(rgroup.temp); DPRINTF(("power group %d: chan=%d maxpwr=%d temp=%d\n", n, group->chan, group->maxpwr, group->temp)); for (i = 0; i < WPI_SAMPLES_COUNT; i++) { group->samples[i].index = rgroup.samples[i].index; group->samples[i].power = rgroup.samples[i].power; DPRINTF(("\tsample %d: index=%d power=%d\n", i, group->samples[i].index, group->samples[i].power)); } } /* * Send a command to the firmware. */ int wpi_cmd(struct wpi_softc *sc, int code, const void *buf, int size, int async) { struct wpi_tx_ring *ring = &sc->txq[4]; struct wpi_tx_desc *desc; struct wpi_tx_cmd *cmd; KASSERT(size <= sizeof cmd->data); desc = &ring->desc[ring->cur]; cmd = &ring->cmd[ring->cur]; cmd->code = code; cmd->flags = 0; cmd->qid = ring->qid; cmd->idx = ring->cur; memcpy(cmd->data, buf, size); desc->flags = htole32(WPI_PAD32(size) << 28 | 1 << 24); desc->segs[0].addr = htole32(ring->cmd_dma.paddr + ring->cur * sizeof (struct wpi_tx_cmd)); desc->segs[0].len = htole32(4 + size); /* kick cmd ring */ ring->cur = (ring->cur + 1) % WPI_TX_RING_COUNT; WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); return async ? 0 : tsleep(cmd, PCATCH, "wpicmd", hz); } /* * Configure h/w multi-rate retries. */ int wpi_mrr_setup(struct wpi_softc *sc) { struct ieee80211com *ic = &sc->sc_ic; struct wpi_mrr_setup mrr; int i, error; /* CCK rates (not used with 802.11a) */ for (i = WPI_CCK1; i <= WPI_CCK11; i++) { mrr.rates[i].flags = 0; mrr.rates[i].plcp = wpi_ridx_to_plcp[i]; /* fallback to the immediate lower CCK rate (if any) */ mrr.rates[i].next = (i == WPI_CCK1) ? WPI_CCK1 : i - 1; /* try one time at this rate before falling back to "next" */ mrr.rates[i].ntries = 1; } /* OFDM rates (not used with 802.11b) */ for (i = WPI_OFDM6; i <= WPI_OFDM54; i++) { mrr.rates[i].flags = 0; mrr.rates[i].plcp = wpi_ridx_to_plcp[i]; /* fallback to the immediate lower rate (if any) */ /* we allow fallback from OFDM/6 to CCK/2 in 11b/g mode */ mrr.rates[i].next = (i == WPI_OFDM6) ? ((ic->ic_curmode == IEEE80211_MODE_11A) ? WPI_OFDM6 : WPI_CCK2) : i - 1; /* try one time at this rate before falling back to "next" */ mrr.rates[i].ntries = 1; } /* setup MRR for control frames */ mrr.which = htole32(WPI_MRR_CTL); error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0); if (error != 0) { printf("%s: could not setup MRR for control frames\n", sc->sc_dev.dv_xname); return error; } /* setup MRR for data frames */ mrr.which = htole32(WPI_MRR_DATA); error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0); if (error != 0) { printf("%s: could not setup MRR for data frames\n", sc->sc_dev.dv_xname); return error; } return 0; } /* * Install a pairwise key into the hardware. */ int wpi_set_key(struct ieee80211com *ic, struct ieee80211_node *ni, const struct ieee80211_key *k) { struct wpi_softc *sc = ic->ic_softc; struct wpi_node_info node; if (k->k_flags & IEEE80211_KEY_GROUP) return 0; memset(&node, 0, sizeof node); switch (k->k_cipher) { case IEEE80211_CIPHER_CCMP: node.security = htole16(WPI_CIPHER_CCMP); node.security |= htole16(k->k_id << 8); memcpy(node.key, k->k_key, k->k_len); break; default: return 0; } node.id = WPI_ID_BSS; IEEE80211_ADDR_COPY(node.macaddr, ni->ni_macaddr); node.control = WPI_NODE_UPDATE; node.flags = WPI_FLAG_SET_KEY; return wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 1); } void wpi_updateedca(struct ieee80211com *ic) { #define WPI_EXP2(x) ((1 << (x)) - 1) /* CWmin = 2^ECWmin - 1 */ struct wpi_softc *sc = ic->ic_softc; struct wpi_edca_params cmd; int aci; memset(&cmd, 0, sizeof cmd); cmd.flags = htole32(WPI_EDCA_UPDATE); for (aci = 0; aci < EDCA_NUM_AC; aci++) { const struct ieee80211_edca_ac_params *ac = &ic->ic_edca_ac[aci]; cmd.ac[aci].aifsn = ac->ac_aifsn; cmd.ac[aci].cwmin = htole16(WPI_EXP2(ac->ac_ecwmin)); cmd.ac[aci].cwmax = htole16(WPI_EXP2(ac->ac_ecwmax)); cmd.ac[aci].txoplimit = htole16(IEEE80211_TXOP_TO_US(ac->ac_txoplimit)); } (void)wpi_cmd(sc, WPI_CMD_EDCA_PARAMS, &cmd, sizeof cmd, 1); #undef WPI_EXP2 } void wpi_set_led(struct wpi_softc *sc, uint8_t which, uint8_t off, uint8_t on) { struct wpi_cmd_led led; led.which = which; led.unit = htole32(100000); /* on/off in unit of 100ms */ led.off = off; led.on = on; (void)wpi_cmd(sc, WPI_CMD_SET_LED, &led, sizeof led, 1); } void wpi_enable_tsf(struct wpi_softc *sc, struct ieee80211_node *ni) { struct wpi_cmd_tsf tsf; uint64_t val, mod; memset(&tsf, 0, sizeof tsf); memcpy(&tsf.tstamp, ni->ni_tstamp, sizeof (uint64_t)); tsf.bintval = htole16(ni->ni_intval); tsf.lintval = htole16(10); /* compute remaining time until next beacon */ val = (uint64_t)ni->ni_intval * 1024; /* msecs -> usecs */ mod = letoh64(tsf.tstamp) % val; tsf.binitval = htole32((uint32_t)(val - mod)); DPRINTF(("TSF bintval=%u tstamp=%llu, init=%u\n", ni->ni_intval, letoh64(tsf.tstamp), (uint32_t)(val - mod))); if (wpi_cmd(sc, WPI_CMD_TSF, &tsf, sizeof tsf, 1) != 0) printf("%s: could not enable TSF\n", sc->sc_dev.dv_xname); } /* * Update Tx power to match what is defined for channel `c'. */ int wpi_set_txpower(struct wpi_softc *sc, struct ieee80211_channel *c, int async) { struct ieee80211com *ic = &sc->sc_ic; struct wpi_power_group *group; struct wpi_cmd_txpower txpower; u_int chan; int i; /* get channel number */ chan = ieee80211_chan2ieee(ic, c); /* find the power group to which this channel belongs */ if (IEEE80211_IS_CHAN_5GHZ(c)) { for (group = &sc->groups[1]; group < &sc->groups[4]; group++) if (chan <= group->chan) break; } else group = &sc->groups[0]; memset(&txpower, 0, sizeof txpower); txpower.band = IEEE80211_IS_CHAN_5GHZ(c) ? 0 : 1; txpower.chan = htole16(chan); /* set Tx power for all OFDM and CCK rates */ for (i = 0; i <= 11 ; i++) { /* retrieve Tx power for this channel/rate combination */ int idx = wpi_get_power_index(sc, group, c, wpi_ridx_to_rate[i]); txpower.rates[i].plcp = wpi_ridx_to_plcp[i]; if (IEEE80211_IS_CHAN_5GHZ(c)) { txpower.rates[i].rf_gain = wpi_rf_gain_5ghz[idx]; txpower.rates[i].dsp_gain = wpi_dsp_gain_5ghz[idx]; } else { txpower.rates[i].rf_gain = wpi_rf_gain_2ghz[idx]; txpower.rates[i].dsp_gain = wpi_dsp_gain_2ghz[idx]; } DPRINTF(("chan %d/rate %d: power index %d\n", chan, wpi_ridx_to_rate[i], idx)); } return wpi_cmd(sc, WPI_CMD_TXPOWER, &txpower, sizeof txpower, async); } /* * Determine Tx power index for a given channel/rate combination. * This takes into account the regulatory information from EEPROM and the * current temperature. */ int wpi_get_power_index(struct wpi_softc *sc, struct wpi_power_group *group, struct ieee80211_channel *c, int rate) { /* fixed-point arithmetic division using a n-bit fractional part */ #define fdivround(a, b, n) \ ((((1 << n) * (a)) / (b) + (1 << n) / 2) / (1 << n)) /* linear interpolation */ #define interpolate(x, x1, y1, x2, y2, n) \ ((y1) + fdivround(((x) - (x1)) * ((y2) - (y1)), (x2) - (x1), n)) struct ieee80211com *ic = &sc->sc_ic; struct wpi_power_sample *sample; int pwr, idx; u_int chan; /* get channel number */ chan = ieee80211_chan2ieee(ic, c); /* default power is group's maximum power - 3dB */ pwr = group->maxpwr / 2; /* decrease power for highest OFDM rates to reduce distortion */ switch (rate) { case 72: /* 36Mb/s */ pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 0 : 5; break; case 96: /* 48Mb/s */ pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 7 : 10; break; case 108: /* 54Mb/s */ pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 9 : 12; break; } /* never exceed channel's maximum allowed Tx power */ pwr = min(pwr, sc->maxpwr[chan]); /* retrieve power index into gain tables from samples */ for (sample = group->samples; sample < &group->samples[3]; sample++) if (pwr > sample[1].power) break; /* fixed-point linear interpolation using a 19-bit fractional part */ idx = interpolate(pwr, sample[0].power, sample[0].index, sample[1].power, sample[1].index, 19); /*- * Adjust power index based on current temperature: * - if cooler than factory-calibrated: decrease output power * - if warmer than factory-calibrated: increase output power */ idx -= (sc->temp - group->temp) * 11 / 100; /* decrease power for CCK rates (-5dB) */ if (!WPI_RATE_IS_OFDM(rate)) idx += 10; /* keep power index in a valid range */ if (idx < 0) return 0; if (idx > WPI_MAX_PWR_INDEX) return WPI_MAX_PWR_INDEX; return idx; #undef interpolate #undef fdivround } int wpi_auth(struct wpi_softc *sc) { struct ieee80211com *ic = &sc->sc_ic; struct ieee80211_node *ni = ic->ic_bss; struct wpi_node_info node; int error; /* update adapter's configuration */ IEEE80211_ADDR_COPY(sc->config.bssid, ni->ni_bssid); sc->config.chan = ieee80211_chan2ieee(ic, ni->ni_chan); if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { sc->config.flags |= htole32(WPI_CONFIG_AUTO | WPI_CONFIG_24GHZ); } switch (ic->ic_curmode) { case IEEE80211_MODE_11A: sc->config.cck_mask = 0; sc->config.ofdm_mask = 0x15; break; case IEEE80211_MODE_11B: sc->config.cck_mask = 0x03; sc->config.ofdm_mask = 0; break; default: /* assume 802.11b/g */ sc->config.cck_mask = 0x0f; sc->config.ofdm_mask = 0x15; } if (ic->ic_flags & IEEE80211_F_SHSLOT) sc->config.flags |= htole32(WPI_CONFIG_SHSLOT); if (ic->ic_flags & IEEE80211_F_SHPREAMBLE) sc->config.flags |= htole32(WPI_CONFIG_SHPREAMBLE); DPRINTF(("config chan %d flags %x cck %x ofdm %x\n", sc->config.chan, sc->config.flags, sc->config.cck_mask, sc->config.ofdm_mask)); error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, sizeof (struct wpi_config), 1); if (error != 0) { printf("%s: could not configure\n", sc->sc_dev.dv_xname); return error; } /* configuration has changed, set Tx power accordingly */ if ((error = wpi_set_txpower(sc, ni->ni_chan, 1)) != 0) { printf("%s: could not set Tx power\n", sc->sc_dev.dv_xname); return error; } /* add default node */ memset(&node, 0, sizeof node); IEEE80211_ADDR_COPY(node.macaddr, ni->ni_bssid); node.id = WPI_ID_BSS; node.rate = (ic->ic_curmode == IEEE80211_MODE_11A) ? wpi_plcp_signal(12) : wpi_plcp_signal(2); node.action = htole32(WPI_ACTION_SET_RATE); node.antenna = WPI_ANTENNA_BOTH; error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 1); if (error != 0) { printf("%s: could not add BSS node\n", sc->sc_dev.dv_xname); return error; } return 0; } /* * Send a scan request to the firmware. Since this command is huge, we map it * into a mbuf instead of using the pre-allocated set of commands. */ int wpi_scan(struct wpi_softc *sc, uint16_t flags) { struct ieee80211com *ic = &sc->sc_ic; struct wpi_tx_ring *ring = &sc->txq[4]; struct wpi_tx_desc *desc; struct wpi_tx_data *data; struct wpi_tx_cmd *cmd; struct wpi_scan_hdr *hdr; struct wpi_cmd_data *tx; struct wpi_scan_essid *essid; struct wpi_scan_chan *chan; struct ieee80211_frame *wh; struct ieee80211_rateset *rs; struct ieee80211_channel *c; enum ieee80211_phymode mode; uint8_t *frm; int pktlen, error; desc = &ring->desc[ring->cur]; data = &ring->data[ring->cur]; MGETHDR(data->m, M_DONTWAIT, MT_DATA); if (data->m == NULL) { printf("%s: could not allocate mbuf for scan command\n", sc->sc_dev.dv_xname); return ENOMEM; } MCLGET(data->m, M_DONTWAIT); if (!(data->m->m_flags & M_EXT)) { m_freem(data->m); data->m = NULL; printf("%s: could not allocate mbuf for scan command\n", sc->sc_dev.dv_xname); return ENOMEM; } cmd = mtod(data->m, struct wpi_tx_cmd *); cmd->code = WPI_CMD_SCAN; cmd->flags = 0; cmd->qid = ring->qid; cmd->idx = ring->cur; hdr = (struct wpi_scan_hdr *)cmd->data; memset(hdr, 0, sizeof (struct wpi_scan_hdr)); /* * Move to the next channel if no packets are received within 5 msecs * after sending the probe request (this helps to reduce the duration * of active scans). */ hdr->quiet = htole16(5); /* timeout in milliseconds */ hdr->plcp_threshold = htole16(1); /* min # of packets */ tx = (struct wpi_cmd_data *)(hdr + 1); memset(tx, 0, sizeof (struct wpi_cmd_data)); tx->flags = htole32(WPI_TX_AUTO_SEQ); tx->id = WPI_ID_BROADCAST; tx->lifetime = htole32(WPI_LIFETIME_INFINITE); if (flags & IEEE80211_CHAN_A) { hdr->crc_threshold = htole16(1); /* send probe requests at 6Mbps */ tx->rate = wpi_ridx_to_plcp[WPI_OFDM6]; } else { hdr->flags = htole32(WPI_CONFIG_24GHZ | WPI_CONFIG_AUTO); /* send probe requests at 1Mbps */ tx->rate = wpi_ridx_to_plcp[WPI_CCK1]; } essid = (struct wpi_scan_essid *)(tx + 1); memset(essid, 0, 4 * sizeof (struct wpi_scan_essid)); essid[0].id = IEEE80211_ELEMID_SSID; essid[0].len = ic->ic_des_esslen; memcpy(essid[0].data, ic->ic_des_essid, ic->ic_des_esslen); /* * Build a probe request frame. Most of the following code is a * copy & paste of what is done in net80211. */ wh = (struct ieee80211_frame *)&essid[4]; wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ; wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; IEEE80211_ADDR_COPY(wh->i_addr1, etherbroadcastaddr); IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_myaddr); IEEE80211_ADDR_COPY(wh->i_addr3, etherbroadcastaddr); *(u_int16_t *)&wh->i_dur[0] = 0; /* filled by h/w */ *(u_int16_t *)&wh->i_seq[0] = 0; /* filled by h/w */ frm = (uint8_t *)(wh + 1); /* add SSID IE */ frm = ieee80211_add_ssid(frm, ic->ic_des_essid, ic->ic_des_esslen); mode = ieee80211_chan2mode(ic, ic->ic_ibss_chan); rs = &ic->ic_sup_rates[mode]; /* add supported rates IE */ frm = ieee80211_add_rates(frm, rs); /* add supported xrates IE */ if (rs->rs_nrates > IEEE80211_RATE_SIZE) frm = ieee80211_add_xrates(frm, rs); /* setup length of probe request */ tx->len = htole16(frm - (uint8_t *)wh); chan = (struct wpi_scan_chan *)frm; for (c = &ic->ic_channels[1]; c <= &ic->ic_channels[IEEE80211_CHAN_MAX]; c++) { if ((c->ic_flags & flags) != flags) continue; chan->chan = ieee80211_chan2ieee(ic, c); chan->flags = 0; if (!(c->ic_flags & IEEE80211_CHAN_PASSIVE)) { chan->flags |= WPI_CHAN_ACTIVE; if (ic->ic_des_esslen != 0) chan->flags |= WPI_CHAN_DIRECT; } chan->dsp_gain = 0x6e; if (IEEE80211_IS_CHAN_5GHZ(c)) { chan->rf_gain = 0x3b; chan->active = htole16(10); chan->passive = htole16(110); } else { chan->rf_gain = 0x28; chan->active = htole16(20); chan->passive = htole16(120); } hdr->nchan++; chan++; frm += sizeof (struct wpi_scan_chan); } hdr->len = htole16(frm - (uint8_t *)hdr); pktlen = frm - (uint8_t *)cmd; error = bus_dmamap_load(sc->sc_dmat, data->map, cmd, pktlen, NULL, BUS_DMA_NOWAIT); if (error != 0) { printf("%s: could not map scan command\n", sc->sc_dev.dv_xname); m_freem(data->m); data->m = NULL; return error; } desc->flags = htole32(WPI_PAD32(pktlen) << 28 | 1 << 24); desc->segs[0].addr = htole32(data->map->dm_segs[0].ds_addr); desc->segs[0].len = htole32(data->map->dm_segs[0].ds_len); /* kick cmd ring */ ring->cur = (ring->cur + 1) % WPI_TX_RING_COUNT; WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); return 0; /* will be notified async. of failure/success */ } int wpi_config(struct wpi_softc *sc) { struct ieee80211com *ic = &sc->sc_ic; struct ifnet *ifp = &ic->ic_if; struct wpi_power power; struct wpi_bluetooth bluetooth; struct wpi_node_info node; int error; /* set power mode */ memset(&power, 0, sizeof power); power.flags = htole32(WPI_POWER_CAM | 0x8); error = wpi_cmd(sc, WPI_CMD_SET_POWER_MODE, &power, sizeof power, 0); if (error != 0) { printf("%s: could not set power mode\n", sc->sc_dev.dv_xname); return error; } /* configure bluetooth coexistence */ memset(&bluetooth, 0, sizeof bluetooth); bluetooth.flags = 3; bluetooth.lead = 0xaa; bluetooth.kill = 1; error = wpi_cmd(sc, WPI_CMD_BLUETOOTH, &bluetooth, sizeof bluetooth, 0); if (error != 0) { printf("%s: could not configure bluetooth coexistence\n", sc->sc_dev.dv_xname); return error; } /* configure adapter */ memset(&sc->config, 0, sizeof (struct wpi_config)); IEEE80211_ADDR_COPY(ic->ic_myaddr, LLADDR(ifp->if_sadl)); IEEE80211_ADDR_COPY(sc->config.myaddr, ic->ic_myaddr); /* set default channel */ sc->config.chan = ieee80211_chan2ieee(ic, ic->ic_ibss_chan); sc->config.flags = htole32(WPI_CONFIG_TSF); if (IEEE80211_IS_CHAN_2GHZ(ic->ic_ibss_chan)) { sc->config.flags |= htole32(WPI_CONFIG_AUTO | WPI_CONFIG_24GHZ); } sc->config.filter = 0; switch (ic->ic_opmode) { case IEEE80211_M_STA: sc->config.mode = WPI_MODE_STA; sc->config.filter |= htole32(WPI_FILTER_MULTICAST); break; case IEEE80211_M_IBSS: case IEEE80211_M_AHDEMO: sc->config.mode = WPI_MODE_IBSS; break; case IEEE80211_M_HOSTAP: sc->config.mode = WPI_MODE_HOSTAP; break; case IEEE80211_M_MONITOR: sc->config.mode = WPI_MODE_MONITOR; sc->config.filter |= htole32(WPI_FILTER_MULTICAST | WPI_FILTER_CTL | WPI_FILTER_PROMISC); break; } sc->config.cck_mask = 0x0f; /* not yet negotiated */ sc->config.ofdm_mask = 0xff; /* not yet negotiated */ error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, sizeof (struct wpi_config), 0); if (error != 0) { printf("%s: configure command failed\n", sc->sc_dev.dv_xname); return error; } /* configuration has changed, set Tx power accordingly */ if ((error = wpi_set_txpower(sc, ic->ic_ibss_chan, 0)) != 0) { printf("%s: could not set Tx power\n", sc->sc_dev.dv_xname); return error; } /* add broadcast node */ memset(&node, 0, sizeof node); IEEE80211_ADDR_COPY(node.macaddr, etherbroadcastaddr); node.id = WPI_ID_BROADCAST; node.rate = wpi_plcp_signal(2); node.action = htole32(WPI_ACTION_SET_RATE); node.antenna = WPI_ANTENNA_BOTH; error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 0); if (error != 0) { printf("%s: could not add broadcast node\n", sc->sc_dev.dv_xname); return error; } if ((error = wpi_mrr_setup(sc)) != 0) { printf("%s: could not setup MRR\n", sc->sc_dev.dv_xname); return error; } return 0; } void wpi_stop_master(struct wpi_softc *sc) { uint32_t tmp; int ntries; tmp = WPI_READ(sc, WPI_RESET); WPI_WRITE(sc, WPI_RESET, tmp | WPI_STOP_MASTER); tmp = WPI_READ(sc, WPI_GPIO_CTL); if ((tmp & WPI_GPIO_PWR_STATUS) == WPI_GPIO_PWR_SLEEP) return; /* already asleep */ for (ntries = 0; ntries < 100; ntries++) { if (WPI_READ(sc, WPI_RESET) & WPI_MASTER_DISABLED) break; DELAY(10); } if (ntries == 100) { printf("%s: timeout waiting for master\n", sc->sc_dev.dv_xname); } } int wpi_power_up(struct wpi_softc *sc) { uint32_t tmp; int ntries; wpi_mem_lock(sc); tmp = wpi_mem_read(sc, WPI_MEM_POWER); wpi_mem_write(sc, WPI_MEM_POWER, tmp & ~0x03000000); wpi_mem_unlock(sc); for (ntries = 0; ntries < 5000; ntries++) { if (WPI_READ(sc, WPI_GPIO_STATUS) & WPI_POWERED) break; DELAY(10); } if (ntries == 5000) { printf("%s: timeout waiting for NIC to power up\n", sc->sc_dev.dv_xname); return ETIMEDOUT; } return 0; } int wpi_reset(struct wpi_softc *sc) { uint32_t tmp; int ntries; /* clear any pending interrupts */ WPI_WRITE(sc, WPI_INTR, 0xffffffff); tmp = WPI_READ(sc, WPI_PLL_CTL); WPI_WRITE(sc, WPI_PLL_CTL, tmp | WPI_PLL_INIT); tmp = WPI_READ(sc, WPI_CHICKEN); WPI_WRITE(sc, WPI_CHICKEN, tmp | WPI_CHICKEN_RXNOLOS); tmp = WPI_READ(sc, WPI_GPIO_CTL); WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_INIT); /* wait for clock stabilization */ for (ntries = 0; ntries < 1000; ntries++) { if (WPI_READ(sc, WPI_GPIO_CTL) & WPI_GPIO_CLOCK) break; DELAY(10); } if (ntries == 1000) { printf("%s: timeout waiting for clock stabilization\n", sc->sc_dev.dv_xname); return ETIMEDOUT; } /* initialize EEPROM */ tmp = WPI_READ(sc, WPI_EEPROM_STATUS); if ((tmp & WPI_EEPROM_VERSION) == 0) { printf("%s: EEPROM not found\n", sc->sc_dev.dv_xname); return EIO; } WPI_WRITE(sc, WPI_EEPROM_STATUS, tmp & ~WPI_EEPROM_LOCKED); return 0; } void wpi_hw_config(struct wpi_softc *sc) { uint32_t rev, hw; /* voodoo from the reference driver */ hw = WPI_READ(sc, WPI_HWCONFIG); rev = pci_conf_read(sc->sc_pct, sc->sc_pcitag, PCI_CLASS_REG); rev = PCI_REVISION(rev); if ((rev & 0xc0) == 0x40) hw |= WPI_HW_ALM_MB; else if (!(rev & 0x80)) hw |= WPI_HW_ALM_MM; if (sc->cap == 0x80) hw |= WPI_HW_SKU_MRC; hw &= ~WPI_HW_REV_D; if ((letoh16(sc->rev) & 0xf0) == 0xd0) hw |= WPI_HW_REV_D; if (sc->type > 1) hw |= WPI_HW_TYPE_B; DPRINTF(("setting h/w config %x\n", hw)); WPI_WRITE(sc, WPI_HWCONFIG, hw); } int wpi_init(struct ifnet *ifp) { struct wpi_softc *sc = ifp->if_softc; struct ieee80211com *ic = &sc->sc_ic; uint32_t tmp; int qid, ntries, error; (void)wpi_reset(sc); wpi_mem_lock(sc); wpi_mem_write(sc, WPI_MEM_CLOCK1, 0xa00); DELAY(20); tmp = wpi_mem_read(sc, WPI_MEM_PCIDEV); wpi_mem_write(sc, WPI_MEM_PCIDEV, tmp | 0x800); wpi_mem_unlock(sc); (void)wpi_power_up(sc); wpi_hw_config(sc); /* init Rx ring */ wpi_mem_lock(sc); WPI_WRITE(sc, WPI_RX_BASE, sc->rxq.desc_dma.paddr); WPI_WRITE(sc, WPI_RX_RIDX_PTR, sc->shared_dma.paddr + offsetof(struct wpi_shared, next)); WPI_WRITE(sc, WPI_RX_WIDX, (WPI_RX_RING_COUNT - 1) & ~7); WPI_WRITE(sc, WPI_RX_CONFIG, 0xa9601010); wpi_mem_unlock(sc); /* init Tx rings */ wpi_mem_lock(sc); wpi_mem_write(sc, WPI_MEM_MODE, 2); /* bypass mode */ wpi_mem_write(sc, WPI_MEM_RA, 1); /* enable RA0 */ wpi_mem_write(sc, WPI_MEM_TXCFG, 0x3f); /* enable all 6 Tx rings */ wpi_mem_write(sc, WPI_MEM_BYPASS1, 0x10000); wpi_mem_write(sc, WPI_MEM_BYPASS2, 0x30002); wpi_mem_write(sc, WPI_MEM_MAGIC4, 4); wpi_mem_write(sc, WPI_MEM_MAGIC5, 5); WPI_WRITE(sc, WPI_TX_BASE_PTR, sc->shared_dma.paddr); WPI_WRITE(sc, WPI_MSG_CONFIG, 0xffff05a5); for (qid = 0; qid < 6; qid++) { WPI_WRITE(sc, WPI_TX_CTL(qid), 0); WPI_WRITE(sc, WPI_TX_BASE(qid), 0); WPI_WRITE(sc, WPI_TX_CONFIG(qid), 0x80200008); } wpi_mem_unlock(sc); /* clear "radio off" and "disable command" bits (reversed logic) */ WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); WPI_WRITE(sc, WPI_UCODE_CLR, WPI_DISABLE_CMD); /* clear any pending interrupts */ WPI_WRITE(sc, WPI_INTR, 0xffffffff); /* enable interrupts */ WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK); /* not sure why/if this is necessary... */ WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); if ((error = wpi_load_firmware(sc)) != 0) { printf("%s: could not load firmware\n", sc->sc_dev.dv_xname); goto fail1; } /* check that the radio is not disabled by RF switch */ wpi_mem_lock(sc); tmp = wpi_mem_read(sc, WPI_MEM_RFKILL); wpi_mem_unlock(sc); if (!(tmp & 1)) { printf("%s: radio is disabled by hardware switch\n", sc->sc_dev.dv_xname); error = EPERM; /* XXX ;-) */ goto fail1; } /* wait for thermal sensors to calibrate */ for (ntries = 0; ntries < 1000; ntries++) { if ((sc->temp = (int)WPI_READ(sc, WPI_TEMPERATURE)) != 0) break; DELAY(10); } if (ntries == 1000) { printf("%s: timeout waiting for thermal sensors calibration\n", sc->sc_dev.dv_xname); error = ETIMEDOUT; goto fail1; } DPRINTF(("temperature %d\n", sc->temp)); sc->sensor.value = sc->temp + 260; sc->sensor.flags &= ~SENSOR_FINVALID; if ((error = wpi_config(sc)) != 0) { printf("%s: could not configure device\n", sc->sc_dev.dv_xname); goto fail1; } ifp->if_flags &= ~IFF_OACTIVE; ifp->if_flags |= IFF_RUNNING; if (ic->ic_opmode != IEEE80211_M_MONITOR) ieee80211_begin_scan(ifp); else ieee80211_new_state(ic, IEEE80211_S_RUN, -1); return 0; fail1: wpi_stop(ifp, 1); return error; } void wpi_stop(struct ifnet *ifp, int disable) { struct wpi_softc *sc = ifp->if_softc; struct ieee80211com *ic = &sc->sc_ic; uint32_t tmp; int i; ifp->if_timer = sc->sc_tx_timer = 0; ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); /* in case we were scanning, release the scan "lock" */ ic->ic_scan_lock = IEEE80211_SCAN_UNLOCKED; ieee80211_new_state(ic, IEEE80211_S_INIT, -1); /* disable interrupts */ WPI_WRITE(sc, WPI_MASK, 0); WPI_WRITE(sc, WPI_INTR, WPI_INTR_MASK); WPI_WRITE(sc, WPI_INTR_STATUS, 0xff); WPI_WRITE(sc, WPI_INTR_STATUS, 0x00070000); wpi_mem_lock(sc); wpi_mem_write(sc, WPI_MEM_MODE, 0); wpi_mem_unlock(sc); /* reset all Tx rings */ for (i = 0; i < WPI_NTXQUEUES; i++) wpi_reset_tx_ring(sc, &sc->txq[i]); /* reset Rx ring */ wpi_reset_rx_ring(sc, &sc->rxq); /* temperature is no longer valid */ sc->sensor.value = 0; sc->sensor.flags |= SENSOR_FINVALID; wpi_mem_lock(sc); wpi_mem_write(sc, WPI_MEM_CLOCK2, 0x200); wpi_mem_unlock(sc); DELAY(5); wpi_stop_master(sc); tmp = WPI_READ(sc, WPI_RESET); WPI_WRITE(sc, WPI_RESET, tmp | WPI_SW_RESET); } struct cfdriver wpi_cd = { NULL, "wpi", DV_IFNET };