File: [local] / sys / dev / usb / if_ral.c (download)
Revision 1.1, Tue Mar 4 16:14:21 2008 UTC (16 years, 2 months ago) by nbrk
Branch point for: MAIN
Initial revision
|
/* $OpenBSD: if_ral.c,v 1.100 2007/07/18 18:10:31 damien Exp $ */
/*-
* Copyright (c) 2005, 2006
* Damien Bergamini <damien.bergamini@free.fr>
*
* 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.
*/
/*-
* Ralink Technology RT2500USB chipset driver
* http://www.ralinktech.com.tw/
*/
#include "bpfilter.h"
#include <sys/param.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/timeout.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <machine/endian.h>
#include <machine/intr.h>
#if NBPFILTER > 0
#include <net/bpf.h>
#endif
#include <net/if.h>
#include <net/if_arp.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/if_ether.h>
#include <netinet/ip.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_amrr.h>
#include <net80211/ieee80211_radiotap.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/usb/usbdevs.h>
#include <dev/usb/if_ralreg.h>
#include <dev/usb/if_ralvar.h>
#ifdef USB_DEBUG
#define URAL_DEBUG
#endif
#ifdef URAL_DEBUG
#define DPRINTF(x) do { if (ural_debug) printf x; } while (0)
#define DPRINTFN(n, x) do { if (ural_debug >= (n)) printf x; } while (0)
int ural_debug = 0;
#else
#define DPRINTF(x)
#define DPRINTFN(n, x)
#endif
/* various supported device vendors/products */
static const struct usb_devno ural_devs[] = {
{ USB_VENDOR_ASUS, USB_PRODUCT_ASUS_RT2570 },
{ USB_VENDOR_ASUS, USB_PRODUCT_ASUS_RT2570_2 },
{ USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5D7050 },
{ USB_VENDOR_CISCOLINKSYS, USB_PRODUCT_CISCOLINKSYS_WUSB54G },
{ USB_VENDOR_CISCOLINKSYS, USB_PRODUCT_CISCOLINKSYS_WUSB54GP },
{ USB_VENDOR_CISCOLINKSYS, USB_PRODUCT_CISCOLINKSYS_HU200TS },
{ USB_VENDOR_CONCEPTRONIC2, USB_PRODUCT_CONCEPTRONIC2_C54RU },
{ USB_VENDOR_DLINK, USB_PRODUCT_DLINK_RT2570 },
{ USB_VENDOR_GIGABYTE, USB_PRODUCT_GIGABYTE_GNWBKG },
{ USB_VENDOR_GUILLEMOT, USB_PRODUCT_GUILLEMOT_HWGUSB254 },
{ USB_VENDOR_MELCO, USB_PRODUCT_MELCO_KG54 },
{ USB_VENDOR_MELCO, USB_PRODUCT_MELCO_KG54AI },
{ USB_VENDOR_MELCO, USB_PRODUCT_MELCO_KG54YB },
{ USB_VENDOR_MELCO, USB_PRODUCT_MELCO_NINWIFI },
{ USB_VENDOR_MSI, USB_PRODUCT_MSI_RT2570 },
{ USB_VENDOR_MSI, USB_PRODUCT_MSI_RT2570_2 },
{ USB_VENDOR_MSI, USB_PRODUCT_MSI_RT2570_3 },
{ USB_VENDOR_NOVATECH, USB_PRODUCT_NOVATECH_NV902W },
{ USB_VENDOR_RALINK, USB_PRODUCT_RALINK_RT2570 },
{ USB_VENDOR_RALINK, USB_PRODUCT_RALINK_RT2570_2 },
{ USB_VENDOR_RALINK, USB_PRODUCT_RALINK_RT2570_3 },
{ USB_VENDOR_SPHAIRON, USB_PRODUCT_SPHAIRON_UB801R },
{ USB_VENDOR_SURECOM, USB_PRODUCT_SURECOM_RT2570 },
{ USB_VENDOR_VTECH, USB_PRODUCT_VTECH_RT2570 },
{ USB_VENDOR_ZINWELL, USB_PRODUCT_ZINWELL_RT2570 }
};
int ural_alloc_tx_list(struct ural_softc *);
void ural_free_tx_list(struct ural_softc *);
int ural_alloc_rx_list(struct ural_softc *);
void ural_free_rx_list(struct ural_softc *);
int ural_media_change(struct ifnet *);
void ural_next_scan(void *);
void ural_task(void *);
int ural_newstate(struct ieee80211com *, enum ieee80211_state,
int);
void ural_txeof(usbd_xfer_handle, usbd_private_handle, usbd_status);
void ural_rxeof(usbd_xfer_handle, usbd_private_handle, usbd_status);
#if NBPFILTER > 0
uint8_t ural_rxrate(const struct ural_rx_desc *);
#endif
int ural_ack_rate(struct ieee80211com *, int);
uint16_t ural_txtime(int, int, uint32_t);
uint8_t ural_plcp_signal(int);
void ural_setup_tx_desc(struct ural_softc *, struct ural_tx_desc *,
uint32_t, int, int);
int ural_tx_bcn(struct ural_softc *, struct mbuf *,
struct ieee80211_node *);
int ural_tx_data(struct ural_softc *, struct mbuf *,
struct ieee80211_node *);
void ural_start(struct ifnet *);
void ural_watchdog(struct ifnet *);
int ural_ioctl(struct ifnet *, u_long, caddr_t);
void ural_eeprom_read(struct ural_softc *, uint16_t, void *, int);
uint16_t ural_read(struct ural_softc *, uint16_t);
void ural_read_multi(struct ural_softc *, uint16_t, void *, int);
void ural_write(struct ural_softc *, uint16_t, uint16_t);
void ural_write_multi(struct ural_softc *, uint16_t, void *, int);
void ural_bbp_write(struct ural_softc *, uint8_t, uint8_t);
uint8_t ural_bbp_read(struct ural_softc *, uint8_t);
void ural_rf_write(struct ural_softc *, uint8_t, uint32_t);
void ural_set_chan(struct ural_softc *, struct ieee80211_channel *);
void ural_disable_rf_tune(struct ural_softc *);
void ural_enable_tsf_sync(struct ural_softc *);
void ural_update_slot(struct ural_softc *);
void ural_set_txpreamble(struct ural_softc *);
void ural_set_basicrates(struct ural_softc *);
void ural_set_bssid(struct ural_softc *, const uint8_t *);
void ural_set_macaddr(struct ural_softc *, const uint8_t *);
void ural_update_promisc(struct ural_softc *);
const char *ural_get_rf(int);
void ural_read_eeprom(struct ural_softc *);
int ural_bbp_init(struct ural_softc *);
void ural_set_txantenna(struct ural_softc *, int);
void ural_set_rxantenna(struct ural_softc *, int);
int ural_init(struct ifnet *);
void ural_stop(struct ifnet *, int);
void ural_newassoc(struct ieee80211com *, struct ieee80211_node *,
int);
void ural_amrr_start(struct ural_softc *, struct ieee80211_node *);
void ural_amrr_timeout(void *);
void ural_amrr_update(usbd_xfer_handle, usbd_private_handle,
usbd_status status);
static const struct {
uint16_t reg;
uint16_t val;
} ural_def_mac[] = {
RAL_DEF_MAC
};
static const struct {
uint8_t reg;
uint8_t val;
} ural_def_bbp[] = {
RAL_DEF_BBP
};
static const uint32_t ural_rf2522_r2[] = RAL_RF2522_R2;
static const uint32_t ural_rf2523_r2[] = RAL_RF2523_R2;
static const uint32_t ural_rf2524_r2[] = RAL_RF2524_R2;
static const uint32_t ural_rf2525_r2[] = RAL_RF2525_R2;
static const uint32_t ural_rf2525_hi_r2[] = RAL_RF2525_HI_R2;
static const uint32_t ural_rf2525e_r2[] = RAL_RF2525E_R2;
static const uint32_t ural_rf2526_hi_r2[] = RAL_RF2526_HI_R2;
static const uint32_t ural_rf2526_r2[] = RAL_RF2526_R2;
int ural_match(struct device *, void *, void *);
void ural_attach(struct device *, struct device *, void *);
int ural_detach(struct device *, int);
int ural_activate(struct device *, enum devact);
struct cfdriver ural_cd = {
NULL, "ural", DV_IFNET
};
const struct cfattach ural_ca = {
sizeof(struct ural_softc),
ural_match,
ural_attach,
ural_detach,
ural_activate,
};
int
ural_match(struct device *parent, void *match, void *aux)
{
struct usb_attach_arg *uaa = aux;
if (uaa->iface != NULL)
return UMATCH_NONE;
return (usb_lookup(ural_devs, uaa->vendor, uaa->product) != NULL) ?
UMATCH_VENDOR_PRODUCT : UMATCH_NONE;
}
void
ural_attach(struct device *parent, struct device *self, void *aux)
{
struct ural_softc *sc = (struct ural_softc *)self;
struct usb_attach_arg *uaa = aux;
struct ieee80211com *ic = &sc->sc_ic;
struct ifnet *ifp = &ic->ic_if;
usb_interface_descriptor_t *id;
usb_endpoint_descriptor_t *ed;
usbd_status error;
char *devinfop;
int i;
sc->sc_udev = uaa->device;
devinfop = usbd_devinfo_alloc(uaa->device, 0);
printf("\n%s: %s\n", sc->sc_dev.dv_xname, devinfop);
usbd_devinfo_free(devinfop);
if (usbd_set_config_no(sc->sc_udev, RAL_CONFIG_NO, 0) != 0) {
printf("%s: could not set configuration no\n",
sc->sc_dev.dv_xname);
return;
}
/* get the first interface handle */
error = usbd_device2interface_handle(sc->sc_udev, RAL_IFACE_INDEX,
&sc->sc_iface);
if (error != 0) {
printf("%s: could not get interface handle\n",
sc->sc_dev.dv_xname);
return;
}
/*
* Find endpoints.
*/
id = usbd_get_interface_descriptor(sc->sc_iface);
sc->sc_rx_no = sc->sc_tx_no = -1;
for (i = 0; i < id->bNumEndpoints; i++) {
ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i);
if (ed == NULL) {
printf("%s: no endpoint descriptor for iface %d\n",
sc->sc_dev.dv_xname, i);
return;
}
if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK)
sc->sc_rx_no = ed->bEndpointAddress;
else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK)
sc->sc_tx_no = ed->bEndpointAddress;
}
if (sc->sc_rx_no == -1 || sc->sc_tx_no == -1) {
printf("%s: missing endpoint\n", sc->sc_dev.dv_xname);
return;
}
usb_init_task(&sc->sc_task, ural_task, sc);
timeout_set(&sc->scan_to, ural_next_scan, sc);
sc->amrr.amrr_min_success_threshold = 1;
sc->amrr.amrr_max_success_threshold = 10;
timeout_set(&sc->amrr_to, ural_amrr_timeout, sc);
/* retrieve RT2570 rev. no */
sc->asic_rev = ural_read(sc, RAL_MAC_CSR0);
/* retrieve MAC address and various other things from EEPROM */
ural_read_eeprom(sc);
printf("%s: MAC/BBP RT%04x (rev 0x%02x), RF %s, address %s\n",
sc->sc_dev.dv_xname, sc->macbbp_rev, sc->asic_rev,
ural_get_rf(sc->rf_rev), ether_sprintf(ic->ic_myaddr));
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_IBSS | /* IBSS mode supported */
IEEE80211_C_MONITOR | /* monitor mode supported */
IEEE80211_C_HOSTAP | /* HostAp mode supported */
IEEE80211_C_TXPMGT | /* tx power management */
IEEE80211_C_SHPREAMBLE | /* short preamble supported */
IEEE80211_C_SHSLOT | /* short slot time supported */
IEEE80211_C_WEP; /* s/w WEP */
/* set supported .11b and .11g rates */
ic->ic_sup_rates[IEEE80211_MODE_11B] = ieee80211_std_rateset_11b;
ic->ic_sup_rates[IEEE80211_MODE_11G] = ieee80211_std_rateset_11g;
/* set supported .11b and .11g channels (1 through 14) */
for (i = 1; i <= 14; i++) {
ic->ic_channels[i].ic_freq =
ieee80211_ieee2mhz(i, IEEE80211_CHAN_2GHZ);
ic->ic_channels[i].ic_flags =
IEEE80211_CHAN_CCK | IEEE80211_CHAN_OFDM |
IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ;
}
ifp->if_softc = sc;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_init = ural_init;
ifp->if_ioctl = ural_ioctl;
ifp->if_start = ural_start;
ifp->if_watchdog = ural_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_newassoc = ural_newassoc;
/* override state transition machine */
sc->sc_newstate = ic->ic_newstate;
ic->ic_newstate = ural_newstate;
ieee80211_media_init(ifp, ural_media_change, ieee80211_media_status);
#if NBPFILTER > 0
bpfattach(&sc->sc_drvbpf, ifp, DLT_IEEE802_11_RADIO,
sizeof (struct ieee80211_frame) + 64);
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(RAL_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(RAL_TX_RADIOTAP_PRESENT);
#endif
usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev,
&sc->sc_dev);
}
int
ural_detach(struct device *self, int flags)
{
struct ural_softc *sc = (struct ural_softc *)self;
struct ifnet *ifp = &sc->sc_ic.ic_if;
int s;
s = splusb();
ieee80211_ifdetach(ifp); /* free all nodes */
if_detach(ifp);
usb_rem_task(sc->sc_udev, &sc->sc_task);
timeout_del(&sc->scan_to);
timeout_del(&sc->amrr_to);
if (sc->amrr_xfer != NULL) {
usbd_free_xfer(sc->amrr_xfer);
sc->amrr_xfer = NULL;
}
if (sc->sc_rx_pipeh != NULL) {
usbd_abort_pipe(sc->sc_rx_pipeh);
usbd_close_pipe(sc->sc_rx_pipeh);
}
if (sc->sc_tx_pipeh != NULL) {
usbd_abort_pipe(sc->sc_tx_pipeh);
usbd_close_pipe(sc->sc_tx_pipeh);
}
ural_free_rx_list(sc);
ural_free_tx_list(sc);
splx(s);
usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev,
&sc->sc_dev);
return 0;
}
int
ural_alloc_tx_list(struct ural_softc *sc)
{
int i, error;
sc->tx_cur = sc->tx_queued = 0;
for (i = 0; i < RAL_TX_LIST_COUNT; i++) {
struct ural_tx_data *data = &sc->tx_data[i];
data->sc = sc;
data->xfer = usbd_alloc_xfer(sc->sc_udev);
if (data->xfer == NULL) {
printf("%s: could not allocate tx xfer\n",
sc->sc_dev.dv_xname);
error = ENOMEM;
goto fail;
}
data->buf = usbd_alloc_buffer(data->xfer,
RAL_TX_DESC_SIZE + IEEE80211_MAX_LEN);
if (data->buf == NULL) {
printf("%s: could not allocate tx buffer\n",
sc->sc_dev.dv_xname);
error = ENOMEM;
goto fail;
}
}
return 0;
fail: ural_free_tx_list(sc);
return error;
}
void
ural_free_tx_list(struct ural_softc *sc)
{
int i;
for (i = 0; i < RAL_TX_LIST_COUNT; i++) {
struct ural_tx_data *data = &sc->tx_data[i];
if (data->xfer != NULL) {
usbd_free_xfer(data->xfer);
data->xfer = NULL;
}
/*
* The node has already been freed at that point so don't call
* ieee80211_release_node() here.
*/
data->ni = NULL;
}
}
int
ural_alloc_rx_list(struct ural_softc *sc)
{
int i, error;
for (i = 0; i < RAL_RX_LIST_COUNT; i++) {
struct ural_rx_data *data = &sc->rx_data[i];
data->sc = sc;
data->xfer = usbd_alloc_xfer(sc->sc_udev);
if (data->xfer == NULL) {
printf("%s: could not allocate rx xfer\n",
sc->sc_dev.dv_xname);
error = ENOMEM;
goto fail;
}
if (usbd_alloc_buffer(data->xfer, MCLBYTES) == NULL) {
printf("%s: could not allocate rx buffer\n",
sc->sc_dev.dv_xname);
error = ENOMEM;
goto fail;
}
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;
}
MCLGET(data->m, M_DONTWAIT);
if (!(data->m->m_flags & M_EXT)) {
printf("%s: could not allocate rx mbuf cluster\n",
sc->sc_dev.dv_xname);
error = ENOMEM;
goto fail;
}
data->buf = mtod(data->m, uint8_t *);
}
return 0;
fail: ural_free_tx_list(sc);
return error;
}
void
ural_free_rx_list(struct ural_softc *sc)
{
int i;
for (i = 0; i < RAL_RX_LIST_COUNT; i++) {
struct ural_rx_data *data = &sc->rx_data[i];
if (data->xfer != NULL) {
usbd_free_xfer(data->xfer);
data->xfer = NULL;
}
if (data->m != NULL) {
m_freem(data->m);
data->m = NULL;
}
}
}
int
ural_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))
ural_init(ifp);
return 0;
}
/*
* This function is called periodically (every 200ms) during scanning to
* switch from one channel to another.
*/
void
ural_next_scan(void *arg)
{
struct ural_softc *sc = arg;
struct ieee80211com *ic = &sc->sc_ic;
struct ifnet *ifp = &ic->ic_if;
if (ic->ic_state == IEEE80211_S_SCAN)
ieee80211_next_scan(ifp);
}
void
ural_task(void *arg)
{
struct ural_softc *sc = arg;
struct ieee80211com *ic = &sc->sc_ic;
enum ieee80211_state ostate;
struct ieee80211_node *ni;
struct mbuf *m;
ostate = ic->ic_state;
switch (sc->sc_state) {
case IEEE80211_S_INIT:
if (ostate == IEEE80211_S_RUN) {
/* abort TSF synchronization */
ural_write(sc, RAL_TXRX_CSR19, 0);
/* force tx led to stop blinking */
ural_write(sc, RAL_MAC_CSR20, 0);
}
break;
case IEEE80211_S_SCAN:
ural_set_chan(sc, ic->ic_bss->ni_chan);
timeout_add(&sc->scan_to, hz / 5);
break;
case IEEE80211_S_AUTH:
ural_set_chan(sc, ic->ic_bss->ni_chan);
break;
case IEEE80211_S_ASSOC:
ural_set_chan(sc, ic->ic_bss->ni_chan);
break;
case IEEE80211_S_RUN:
ural_set_chan(sc, ic->ic_bss->ni_chan);
ni = ic->ic_bss;
if (ic->ic_opmode != IEEE80211_M_MONITOR) {
ural_update_slot(sc);
ural_set_txpreamble(sc);
ural_set_basicrates(sc);
ural_set_bssid(sc, ni->ni_bssid);
}
if (ic->ic_opmode == IEEE80211_M_HOSTAP ||
ic->ic_opmode == IEEE80211_M_IBSS) {
m = ieee80211_beacon_alloc(ic, ni);
if (m == NULL) {
printf("%s: could not allocate beacon\n",
sc->sc_dev.dv_xname);
return;
}
if (ural_tx_bcn(sc, m, ni) != 0) {
m_freem(m);
printf("%s: could not transmit beacon\n",
sc->sc_dev.dv_xname);
return;
}
/* beacon is no longer needed */
m_freem(m);
}
/* make tx led blink on tx (controlled by ASIC) */
ural_write(sc, RAL_MAC_CSR20, 1);
if (ic->ic_opmode != IEEE80211_M_MONITOR)
ural_enable_tsf_sync(sc);
if (ic->ic_opmode == IEEE80211_M_STA) {
/* fake a join to init the tx rate */
ural_newassoc(ic, ic->ic_bss, 1);
/* enable automatic rate control in STA mode */
if (ic->ic_fixed_rate == -1)
ural_amrr_start(sc, ic->ic_bss);
}
break;
}
sc->sc_newstate(ic, sc->sc_state, sc->sc_arg);
}
int
ural_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg)
{
struct ural_softc *sc = ic->ic_if.if_softc;
usb_rem_task(sc->sc_udev, &sc->sc_task);
timeout_del(&sc->scan_to);
timeout_del(&sc->amrr_to);
/* do it in a process context */
sc->sc_state = nstate;
sc->sc_arg = arg;
usb_add_task(sc->sc_udev, &sc->sc_task);
return 0;
}
/* quickly determine if a given rate is CCK or OFDM */
#define RAL_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22)
#define RAL_ACK_SIZE 14 /* 10 + 4(FCS) */
#define RAL_CTS_SIZE 14 /* 10 + 4(FCS) */
#define RAL_SIFS 10 /* us */
#define RAL_RXTX_TURNAROUND 5 /* us */
void
ural_txeof(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status)
{
struct ural_tx_data *data = priv;
struct ural_softc *sc = data->sc;
struct ieee80211com *ic = &sc->sc_ic;
struct ifnet *ifp = &ic->ic_if;
int s;
if (status != USBD_NORMAL_COMPLETION) {
if (status == USBD_NOT_STARTED || status == USBD_CANCELLED)
return;
printf("%s: could not transmit buffer: %s\n",
sc->sc_dev.dv_xname, usbd_errstr(status));
if (status == USBD_STALLED)
usbd_clear_endpoint_stall_async(sc->sc_tx_pipeh);
ifp->if_oerrors++;
return;
}
s = splnet();
ieee80211_release_node(ic, data->ni);
data->ni = NULL;
sc->tx_queued--;
ifp->if_opackets++;
DPRINTFN(10, ("tx done\n"));
sc->sc_tx_timer = 0;
ifp->if_flags &= ~IFF_OACTIVE;
ural_start(ifp);
splx(s);
}
void
ural_rxeof(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status)
{
struct ural_rx_data *data = priv;
struct ural_softc *sc = data->sc;
struct ieee80211com *ic = &sc->sc_ic;
struct ifnet *ifp = &ic->ic_if;
const struct ural_rx_desc *desc;
struct ieee80211_frame *wh;
struct ieee80211_node *ni;
struct mbuf *mnew, *m;
int s, len;
if (status != USBD_NORMAL_COMPLETION) {
if (status == USBD_NOT_STARTED || status == USBD_CANCELLED)
return;
if (status == USBD_STALLED)
usbd_clear_endpoint_stall_async(sc->sc_rx_pipeh);
goto skip;
}
usbd_get_xfer_status(xfer, NULL, NULL, &len, NULL);
if (len < RAL_RX_DESC_SIZE + IEEE80211_MIN_LEN) {
DPRINTF(("%s: xfer too short %d\n", sc->sc_dev.dv_xname,
len));
ifp->if_ierrors++;
goto skip;
}
/* rx descriptor is located at the end */
desc = (struct ural_rx_desc *)(data->buf + len - RAL_RX_DESC_SIZE);
if (letoh32(desc->flags) & (RAL_RX_PHY_ERROR | RAL_RX_CRC_ERROR)) {
/*
* This should not happen since we did not request to receive
* those frames when we filled RAL_TXRX_CSR2.
*/
DPRINTFN(5, ("PHY or CRC error\n"));
ifp->if_ierrors++;
goto skip;
}
MGETHDR(mnew, M_DONTWAIT, MT_DATA);
if (mnew == NULL) {
printf("%s: could not allocate rx mbuf\n",
sc->sc_dev.dv_xname);
ifp->if_ierrors++;
goto skip;
}
MCLGET(mnew, M_DONTWAIT);
if (!(mnew->m_flags & M_EXT)) {
printf("%s: could not allocate rx mbuf cluster\n",
sc->sc_dev.dv_xname);
m_freem(mnew);
ifp->if_ierrors++;
goto skip;
}
m = data->m;
data->m = mnew;
data->buf = mtod(data->m, uint8_t *);
/* finalize mbuf */
m->m_pkthdr.rcvif = ifp;
m->m_pkthdr.len = m->m_len = (letoh32(desc->flags) >> 16) & 0xfff;
m_adj(m, -IEEE80211_CRC_LEN); /* trim FCS */
s = splnet();
#if NBPFILTER > 0
if (sc->sc_drvbpf != NULL) {
struct mbuf mb;
struct ural_rx_radiotap_header *tap = &sc->sc_rxtap;
tap->wr_flags = 0;
tap->wr_rate = ural_rxrate(desc);
tap->wr_chan_freq = htole16(ic->ic_bss->ni_chan->ic_freq);
tap->wr_chan_flags = htole16(ic->ic_bss->ni_chan->ic_flags);
tap->wr_antenna = sc->rx_ant;
tap->wr_antsignal = desc->rssi;
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
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, desc->rssi, 0);
/* node is no longer needed */
ieee80211_release_node(ic, ni);
/*
* In HostAP mode, ieee80211_input() will enqueue packets in if_snd
* without calling if_start().
*/
if (!IFQ_IS_EMPTY(&ifp->if_snd) && !(ifp->if_flags & IFF_OACTIVE))
ural_start(ifp);
splx(s);
DPRINTFN(15, ("rx done\n"));
skip: /* setup a new transfer */
usbd_setup_xfer(xfer, sc->sc_rx_pipeh, data, data->buf, MCLBYTES,
USBD_SHORT_XFER_OK, USBD_NO_TIMEOUT, ural_rxeof);
(void)usbd_transfer(xfer);
}
/*
* This function is only used by the Rx radiotap code. It returns the rate at
* which a given frame was received.
*/
#if NBPFILTER > 0
uint8_t
ural_rxrate(const struct ural_rx_desc *desc)
{
if (letoh32(desc->flags) & RAL_RX_OFDM) {
/* reverse function of ural_plcp_signal */
switch (desc->rate) {
case 0xb: return 12;
case 0xf: return 18;
case 0xa: return 24;
case 0xe: return 36;
case 0x9: return 48;
case 0xd: return 72;
case 0x8: return 96;
case 0xc: return 108;
}
} else {
if (desc->rate == 10)
return 2;
if (desc->rate == 20)
return 4;
if (desc->rate == 55)
return 11;
if (desc->rate == 110)
return 22;
}
return 2; /* should not get there */
}
#endif
/*
* Return the expected ack rate for a frame transmitted at rate `rate'.
*/
int
ural_ack_rate(struct ieee80211com *ic, int rate)
{
switch (rate) {
/* CCK rates */
case 2:
return 2;
case 4:
case 11:
case 22:
return (ic->ic_curmode == IEEE80211_MODE_11B) ? 4 : rate;
/* OFDM rates */
case 12:
case 18:
return 12;
case 24:
case 36:
return 24;
case 48:
case 72:
case 96:
case 108:
return 48;
}
/* default to 1Mbps */
return 2;
}
/*
* Compute the duration (in us) needed to transmit `len' bytes at rate `rate'.
* The function automatically determines the operating mode depending on the
* given rate. `flags' indicates whether short preamble is in use or not.
*/
uint16_t
ural_txtime(int len, int rate, uint32_t flags)
{
uint16_t txtime;
if (RAL_RATE_IS_OFDM(rate)) {
/* IEEE Std 802.11g-2003, pp. 44 */
txtime = (8 + 4 * len + 3 + rate - 1) / rate;
txtime = 16 + 4 + 4 * txtime + 6;
} else {
/* IEEE Std 802.11b-1999, pp. 28 */
txtime = (16 * len + rate - 1) / rate;
if (rate != 2 && (flags & IEEE80211_F_SHPREAMBLE))
txtime += 72 + 24;
else
txtime += 144 + 48;
}
return txtime;
}
uint8_t
ural_plcp_signal(int rate)
{
switch (rate) {
/* CCK rates (returned values are device-dependent) */
case 2: return 0x0;
case 4: return 0x1;
case 11: return 0x2;
case 22: return 0x3;
/* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */
case 12: return 0xb;
case 18: return 0xf;
case 24: return 0xa;
case 36: return 0xe;
case 48: return 0x9;
case 72: return 0xd;
case 96: return 0x8;
case 108: return 0xc;
/* unsupported rates (should not get there) */
default: return 0xff;
}
}
void
ural_setup_tx_desc(struct ural_softc *sc, struct ural_tx_desc *desc,
uint32_t flags, int len, int rate)
{
struct ieee80211com *ic = &sc->sc_ic;
uint16_t plcp_length;
int remainder;
desc->flags = htole32(flags);
desc->flags |= htole32(len << 16);
desc->wme = htole16(
RAL_AIFSN(2) |
RAL_LOGCWMIN(3) |
RAL_LOGCWMAX(5));
/* setup PLCP fields */
desc->plcp_signal = ural_plcp_signal(rate);
desc->plcp_service = 4;
len += IEEE80211_CRC_LEN;
if (RAL_RATE_IS_OFDM(rate)) {
desc->flags |= htole32(RAL_TX_OFDM);
plcp_length = len & 0xfff;
desc->plcp_length_hi = plcp_length >> 6;
desc->plcp_length_lo = plcp_length & 0x3f;
} else {
plcp_length = (16 * len + rate - 1) / rate;
if (rate == 22) {
remainder = (16 * len) % 22;
if (remainder != 0 && remainder < 7)
desc->plcp_service |= RAL_PLCP_LENGEXT;
}
desc->plcp_length_hi = plcp_length >> 8;
desc->plcp_length_lo = plcp_length & 0xff;
if (rate != 2 && (ic->ic_flags & IEEE80211_F_SHPREAMBLE))
desc->plcp_signal |= 0x08;
}
desc->iv = 0;
desc->eiv = 0;
}
#define RAL_TX_TIMEOUT 5000
int
ural_tx_bcn(struct ural_softc *sc, struct mbuf *m0, struct ieee80211_node *ni)
{
struct ural_tx_desc *desc;
usbd_xfer_handle xfer;
usbd_status error;
uint8_t cmd = 0;
uint8_t *buf;
int xferlen, rate = 2;
xfer = usbd_alloc_xfer(sc->sc_udev);
if (xfer == NULL)
return ENOMEM;
/* xfer length needs to be a multiple of two! */
xferlen = (RAL_TX_DESC_SIZE + m0->m_pkthdr.len + 1) & ~1;
buf = usbd_alloc_buffer(xfer, xferlen);
if (buf == NULL) {
usbd_free_xfer(xfer);
return ENOMEM;
}
usbd_setup_xfer(xfer, sc->sc_tx_pipeh, NULL, &cmd, sizeof cmd,
USBD_FORCE_SHORT_XFER, RAL_TX_TIMEOUT, NULL);
error = usbd_sync_transfer(xfer);
if (error != 0) {
usbd_free_xfer(xfer);
return error;
}
desc = (struct ural_tx_desc *)buf;
m_copydata(m0, 0, m0->m_pkthdr.len, buf + RAL_TX_DESC_SIZE);
ural_setup_tx_desc(sc, desc, RAL_TX_IFS_NEWBACKOFF | RAL_TX_TIMESTAMP,
m0->m_pkthdr.len, rate);
DPRINTFN(10, ("sending beacon frame len=%u rate=%u xfer len=%u\n",
m0->m_pkthdr.len, rate, xferlen));
usbd_setup_xfer(xfer, sc->sc_tx_pipeh, NULL, buf, xferlen,
USBD_FORCE_SHORT_XFER | USBD_NO_COPY, RAL_TX_TIMEOUT, NULL);
error = usbd_sync_transfer(xfer);
usbd_free_xfer(xfer);
return error;
}
int
ural_tx_data(struct ural_softc *sc, struct mbuf *m0, struct ieee80211_node *ni)
{
struct ieee80211com *ic = &sc->sc_ic;
struct ifnet *ifp = &ic->ic_if;
struct ural_tx_desc *desc;
struct ural_tx_data *data;
struct ieee80211_frame *wh;
uint32_t flags = RAL_TX_NEWSEQ;
uint16_t dur;
usbd_status error;
int rate, xferlen, pktlen, needrts = 0, needcts = 0;
wh = mtod(m0, struct ieee80211_frame *);
if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
m0 = ieee80211_wep_crypt(ifp, m0, 1);
if (m0 == NULL)
return ENOBUFS;
/* packet header may have moved, reset our local pointer */
wh = mtod(m0, struct ieee80211_frame *);
}
/* compute actual packet length (including CRC and crypto overhead) */
pktlen = m0->m_pkthdr.len + IEEE80211_CRC_LEN;
/* 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];
if (rate == 0)
rate = 2; /* XXX should not happen */
rate &= IEEE80211_RATE_VAL;
/* 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 (pktlen > ic->ic_rtsthreshold) {
needrts = 1; /* RTS/CTS based on frame length */
} else if ((ic->ic_flags & IEEE80211_F_USEPROT) &&
RAL_RATE_IS_OFDM(rate)) {
if (ic->ic_protmode == IEEE80211_PROT_CTSONLY)
needcts = 1; /* CTS-to-self */
else if (ic->ic_protmode == IEEE80211_PROT_RTSCTS)
needrts = 1; /* RTS/CTS */
}
}
if (needrts || needcts) {
struct mbuf *mprot;
int protrate, ackrate;
uint16_t dur;
protrate = 2;
ackrate = ural_ack_rate(ic, rate);
dur = ural_txtime(pktlen, rate, ic->ic_flags) +
ural_txtime(RAL_ACK_SIZE, ackrate, ic->ic_flags) +
2 * RAL_SIFS;
if (needrts) {
dur += ural_txtime(RAL_CTS_SIZE, ural_ack_rate(ic,
protrate), ic->ic_flags) + RAL_SIFS;
mprot = ieee80211_get_rts(ic, wh, dur);
} else {
mprot = ieee80211_get_cts_to_self(ic, dur);
}
if (mprot == NULL) {
printf("%s: could not allocate protection frame\n",
sc->sc_dev.dv_xname);
m_freem(m0);
return ENOBUFS;
}
data = &sc->tx_data[sc->tx_cur];
desc = (struct ural_tx_desc *)data->buf;
/* avoid multiple free() of the same node for each fragment */
data->ni = ieee80211_ref_node(ni);
m_copydata(mprot, 0, mprot->m_pkthdr.len,
data->buf + RAL_TX_DESC_SIZE);
ural_setup_tx_desc(sc, desc,
(needrts ? RAL_TX_NEED_ACK : 0) | RAL_TX_RETRY(7),
mprot->m_pkthdr.len, protrate);
/* no roundup necessary here */
xferlen = RAL_TX_DESC_SIZE + mprot->m_pkthdr.len;
/* XXX may want to pass the protection frame to BPF */
/* mbuf is no longer needed */
m_freem(mprot);
usbd_setup_xfer(data->xfer, sc->sc_tx_pipeh, data, data->buf,
xferlen, USBD_FORCE_SHORT_XFER | USBD_NO_COPY,
RAL_TX_TIMEOUT, ural_txeof);
error = usbd_transfer(data->xfer);
if (error != 0 && error != USBD_IN_PROGRESS) {
m_freem(m0);
return error;
}
sc->tx_queued++;
sc->tx_cur = (sc->tx_cur + 1) % RAL_TX_LIST_COUNT;
flags |= RAL_TX_IFS_SIFS;
}
data = &sc->tx_data[sc->tx_cur];
desc = (struct ural_tx_desc *)data->buf;
data->ni = ni;
if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
flags |= RAL_TX_NEED_ACK;
flags |= RAL_TX_RETRY(7);
dur = ural_txtime(RAL_ACK_SIZE, ural_ack_rate(ic, rate),
ic->ic_flags) + RAL_SIFS;
*(uint16_t *)wh->i_dur = htole16(dur);
/* tell hardware to set timestamp in probe responses */
if ((wh->i_fc[0] &
(IEEE80211_FC0_TYPE_MASK | IEEE80211_FC0_SUBTYPE_MASK)) ==
(IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP))
flags |= RAL_TX_TIMESTAMP;
}
#if NBPFILTER > 0
if (sc->sc_drvbpf != NULL) {
struct mbuf mb;
struct ural_tx_radiotap_header *tap = &sc->sc_txtap;
tap->wt_flags = 0;
tap->wt_rate = rate;
tap->wt_chan_freq = htole16(ic->ic_bss->ni_chan->ic_freq);
tap->wt_chan_flags = htole16(ic->ic_bss->ni_chan->ic_flags);
tap->wt_antenna = sc->tx_ant;
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
m_copydata(m0, 0, m0->m_pkthdr.len, data->buf + RAL_TX_DESC_SIZE);
ural_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate);
/* align end on a 2-bytes boundary */
xferlen = (RAL_TX_DESC_SIZE + m0->m_pkthdr.len + 1) & ~1;
/*
* No space left in the last URB to store the extra 2 bytes, force
* sending of another URB.
*/
if ((xferlen % 64) == 0)
xferlen += 2;
DPRINTFN(10, ("sending frame len=%u rate=%u xfer len=%u\n",
m0->m_pkthdr.len, rate, xferlen));
/* mbuf is no longer needed */
m_freem(m0);
usbd_setup_xfer(data->xfer, sc->sc_tx_pipeh, data, data->buf, xferlen,
USBD_FORCE_SHORT_XFER | USBD_NO_COPY, RAL_TX_TIMEOUT, ural_txeof);
error = usbd_transfer(data->xfer);
if (error != 0 && error != USBD_IN_PROGRESS)
return error;
sc->tx_queued++;
sc->tx_cur = (sc->tx_cur + 1) % RAL_TX_LIST_COUNT;
return 0;
}
void
ural_start(struct ifnet *ifp)
{
struct ural_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) {
if (sc->tx_queued >= RAL_TX_LIST_COUNT - 1) {
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 (ural_tx_data(sc, m0, ni) != 0)
break;
} else {
if (ic->ic_state != IEEE80211_S_RUN)
break;
IFQ_POLL(&ifp->if_snd, m0);
if (m0 == NULL)
break;
if (sc->tx_queued >= RAL_TX_LIST_COUNT - 1) {
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 (ural_tx_data(sc, m0, ni) != 0) {
if (ni != NULL)
ieee80211_release_node(ic, ni);
ifp->if_oerrors++;
break;
}
}
sc->sc_tx_timer = 5;
ifp->if_timer = 1;
}
}
void
ural_watchdog(struct ifnet *ifp)
{
struct ural_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);
/*ural_init(ifp); XXX needs a process context! */
ifp->if_oerrors++;
return;
}
ifp->if_timer = 1;
}
ieee80211_watchdog(ifp);
}
int
ural_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct ural_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)
ural_update_promisc(sc);
else
ural_init(ifp);
} else {
if (ifp->if_flags & IFF_RUNNING)
ural_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;
case SIOCS80211CHANNEL:
/*
* This allows for fast channel switching in monitor mode
* (used by kismet). In IBSS mode, we must explicitly reset
* the interface to generate a new beacon frame.
*/
error = ieee80211_ioctl(ifp, cmd, data);
if (error == ENETRESET &&
ic->ic_opmode == IEEE80211_M_MONITOR) {
if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) ==
(IFF_UP | IFF_RUNNING))
ural_set_chan(sc, ic->ic_ibss_chan);
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))
ural_init(ifp);
error = 0;
}
splx(s);
return error;
}
void
ural_eeprom_read(struct ural_softc *sc, uint16_t addr, void *buf, int len)
{
usb_device_request_t req;
usbd_status error;
req.bmRequestType = UT_READ_VENDOR_DEVICE;
req.bRequest = RAL_READ_EEPROM;
USETW(req.wValue, 0);
USETW(req.wIndex, addr);
USETW(req.wLength, len);
error = usbd_do_request(sc->sc_udev, &req, buf);
if (error != 0) {
printf("%s: could not read EEPROM: %s\n",
sc->sc_dev.dv_xname, usbd_errstr(error));
}
}
uint16_t
ural_read(struct ural_softc *sc, uint16_t reg)
{
usb_device_request_t req;
usbd_status error;
uint16_t val;
req.bmRequestType = UT_READ_VENDOR_DEVICE;
req.bRequest = RAL_READ_MAC;
USETW(req.wValue, 0);
USETW(req.wIndex, reg);
USETW(req.wLength, sizeof (uint16_t));
error = usbd_do_request(sc->sc_udev, &req, &val);
if (error != 0) {
printf("%s: could not read MAC register: %s\n",
sc->sc_dev.dv_xname, usbd_errstr(error));
return 0;
}
return letoh16(val);
}
void
ural_read_multi(struct ural_softc *sc, uint16_t reg, void *buf, int len)
{
usb_device_request_t req;
usbd_status error;
req.bmRequestType = UT_READ_VENDOR_DEVICE;
req.bRequest = RAL_READ_MULTI_MAC;
USETW(req.wValue, 0);
USETW(req.wIndex, reg);
USETW(req.wLength, len);
error = usbd_do_request(sc->sc_udev, &req, buf);
if (error != 0) {
printf("%s: could not read MAC register: %s\n",
sc->sc_dev.dv_xname, usbd_errstr(error));
}
}
void
ural_write(struct ural_softc *sc, uint16_t reg, uint16_t val)
{
usb_device_request_t req;
usbd_status error;
req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
req.bRequest = RAL_WRITE_MAC;
USETW(req.wValue, val);
USETW(req.wIndex, reg);
USETW(req.wLength, 0);
error = usbd_do_request(sc->sc_udev, &req, NULL);
if (error != 0) {
printf("%s: could not write MAC register: %s\n",
sc->sc_dev.dv_xname, usbd_errstr(error));
}
}
void
ural_write_multi(struct ural_softc *sc, uint16_t reg, void *buf, int len)
{
usb_device_request_t req;
usbd_status error;
req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
req.bRequest = RAL_WRITE_MULTI_MAC;
USETW(req.wValue, 0);
USETW(req.wIndex, reg);
USETW(req.wLength, len);
error = usbd_do_request(sc->sc_udev, &req, buf);
if (error != 0) {
printf("%s: could not write MAC register: %s\n",
sc->sc_dev.dv_xname, usbd_errstr(error));
}
}
void
ural_bbp_write(struct ural_softc *sc, uint8_t reg, uint8_t val)
{
uint16_t tmp;
int ntries;
for (ntries = 0; ntries < 5; ntries++) {
if (!(ural_read(sc, RAL_PHY_CSR8) & RAL_BBP_BUSY))
break;
}
if (ntries == 5) {
printf("%s: could not write to BBP\n", sc->sc_dev.dv_xname);
return;
}
tmp = reg << 8 | val;
ural_write(sc, RAL_PHY_CSR7, tmp);
}
uint8_t
ural_bbp_read(struct ural_softc *sc, uint8_t reg)
{
uint16_t val;
int ntries;
val = RAL_BBP_WRITE | reg << 8;
ural_write(sc, RAL_PHY_CSR7, val);
for (ntries = 0; ntries < 5; ntries++) {
if (!(ural_read(sc, RAL_PHY_CSR8) & RAL_BBP_BUSY))
break;
}
if (ntries == 5) {
printf("%s: could not read BBP\n", sc->sc_dev.dv_xname);
return 0;
}
return ural_read(sc, RAL_PHY_CSR7) & 0xff;
}
void
ural_rf_write(struct ural_softc *sc, uint8_t reg, uint32_t val)
{
uint32_t tmp;
int ntries;
for (ntries = 0; ntries < 5; ntries++) {
if (!(ural_read(sc, RAL_PHY_CSR10) & RAL_RF_LOBUSY))
break;
}
if (ntries == 5) {
printf("%s: could not write to RF\n", sc->sc_dev.dv_xname);
return;
}
tmp = RAL_RF_BUSY | RAL_RF_20BIT | (val & 0xfffff) << 2 | (reg & 0x3);
ural_write(sc, RAL_PHY_CSR9, tmp & 0xffff);
ural_write(sc, RAL_PHY_CSR10, tmp >> 16);
/* remember last written value in sc */
sc->rf_regs[reg] = val;
DPRINTFN(15, ("RF R[%u] <- 0x%05x\n", reg & 0x3, val & 0xfffff));
}
void
ural_set_chan(struct ural_softc *sc, struct ieee80211_channel *c)
{
struct ieee80211com *ic = &sc->sc_ic;
uint8_t power, tmp;
u_int chan;
chan = ieee80211_chan2ieee(ic, c);
if (chan == 0 || chan == IEEE80211_CHAN_ANY)
return;
power = min(sc->txpow[chan - 1], 31);
DPRINTFN(2, ("setting channel to %u, txpower to %u\n", chan, power));
switch (sc->rf_rev) {
case RAL_RF_2522:
ural_rf_write(sc, RAL_RF1, 0x00814);
ural_rf_write(sc, RAL_RF2, ural_rf2522_r2[chan - 1]);
ural_rf_write(sc, RAL_RF3, power << 7 | 0x00040);
break;
case RAL_RF_2523:
ural_rf_write(sc, RAL_RF1, 0x08804);
ural_rf_write(sc, RAL_RF2, ural_rf2523_r2[chan - 1]);
ural_rf_write(sc, RAL_RF3, power << 7 | 0x38044);
ural_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286);
break;
case RAL_RF_2524:
ural_rf_write(sc, RAL_RF1, 0x0c808);
ural_rf_write(sc, RAL_RF2, ural_rf2524_r2[chan - 1]);
ural_rf_write(sc, RAL_RF3, power << 7 | 0x00040);
ural_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286);
break;
case RAL_RF_2525:
ural_rf_write(sc, RAL_RF1, 0x08808);
ural_rf_write(sc, RAL_RF2, ural_rf2525_hi_r2[chan - 1]);
ural_rf_write(sc, RAL_RF3, power << 7 | 0x18044);
ural_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286);
ural_rf_write(sc, RAL_RF1, 0x08808);
ural_rf_write(sc, RAL_RF2, ural_rf2525_r2[chan - 1]);
ural_rf_write(sc, RAL_RF3, power << 7 | 0x18044);
ural_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286);
break;
case RAL_RF_2525E:
ural_rf_write(sc, RAL_RF1, 0x08808);
ural_rf_write(sc, RAL_RF2, ural_rf2525e_r2[chan - 1]);
ural_rf_write(sc, RAL_RF3, power << 7 | 0x18044);
ural_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00286 : 0x00282);
break;
case RAL_RF_2526:
ural_rf_write(sc, RAL_RF2, ural_rf2526_hi_r2[chan - 1]);
ural_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381);
ural_rf_write(sc, RAL_RF1, 0x08804);
ural_rf_write(sc, RAL_RF2, ural_rf2526_r2[chan - 1]);
ural_rf_write(sc, RAL_RF3, power << 7 | 0x18044);
ural_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381);
break;
}
if (ic->ic_opmode != IEEE80211_M_MONITOR &&
ic->ic_state != IEEE80211_S_SCAN) {
/* set Japan filter bit for channel 14 */
tmp = ural_bbp_read(sc, 70);
tmp &= ~RAL_JAPAN_FILTER;
if (chan == 14)
tmp |= RAL_JAPAN_FILTER;
ural_bbp_write(sc, 70, tmp);
/* clear CRC errors */
ural_read(sc, RAL_STA_CSR0);
DELAY(1000); /* RF needs a 1ms delay here */
ural_disable_rf_tune(sc);
}
}
/*
* Disable RF auto-tuning.
*/
void
ural_disable_rf_tune(struct ural_softc *sc)
{
uint32_t tmp;
if (sc->rf_rev != RAL_RF_2523) {
tmp = sc->rf_regs[RAL_RF1] & ~RAL_RF1_AUTOTUNE;
ural_rf_write(sc, RAL_RF1, tmp);
}
tmp = sc->rf_regs[RAL_RF3] & ~RAL_RF3_AUTOTUNE;
ural_rf_write(sc, RAL_RF3, tmp);
DPRINTFN(2, ("disabling RF autotune\n"));
}
/*
* Refer to IEEE Std 802.11-1999 pp. 123 for more information on TSF
* synchronization.
*/
void
ural_enable_tsf_sync(struct ural_softc *sc)
{
struct ieee80211com *ic = &sc->sc_ic;
uint16_t logcwmin, preload, tmp;
/* first, disable TSF synchronization */
ural_write(sc, RAL_TXRX_CSR19, 0);
tmp = (16 * ic->ic_bss->ni_intval) << 4;
ural_write(sc, RAL_TXRX_CSR18, tmp);
logcwmin = (ic->ic_opmode == IEEE80211_M_IBSS) ? 2 : 0;
preload = (ic->ic_opmode == IEEE80211_M_IBSS) ? 320 : 6;
tmp = logcwmin << 12 | preload;
ural_write(sc, RAL_TXRX_CSR20, tmp);
/* finally, enable TSF synchronization */
tmp = RAL_ENABLE_TSF | RAL_ENABLE_TBCN;
if (ic->ic_opmode == IEEE80211_M_STA)
tmp |= RAL_ENABLE_TSF_SYNC(1);
else
tmp |= RAL_ENABLE_TSF_SYNC(2) | RAL_ENABLE_BEACON_GENERATOR;
ural_write(sc, RAL_TXRX_CSR19, tmp);
DPRINTF(("enabling TSF synchronization\n"));
}
void
ural_update_slot(struct ural_softc *sc)
{
struct ieee80211com *ic = &sc->sc_ic;
uint16_t slottime, sifs, eifs;
slottime = (ic->ic_flags & IEEE80211_F_SHSLOT) ? 9 : 20;
/*
* These settings may sound a bit inconsistent but this is what the
* reference driver does.
*/
if (ic->ic_curmode == IEEE80211_MODE_11B) {
sifs = 16 - RAL_RXTX_TURNAROUND;
eifs = 364;
} else {
sifs = 10 - RAL_RXTX_TURNAROUND;
eifs = 64;
}
ural_write(sc, RAL_MAC_CSR10, slottime);
ural_write(sc, RAL_MAC_CSR11, sifs);
ural_write(sc, RAL_MAC_CSR12, eifs);
}
void
ural_set_txpreamble(struct ural_softc *sc)
{
uint16_t tmp;
tmp = ural_read(sc, RAL_TXRX_CSR10);
tmp &= ~RAL_SHORT_PREAMBLE;
if (sc->sc_ic.ic_flags & IEEE80211_F_SHPREAMBLE)
tmp |= RAL_SHORT_PREAMBLE;
ural_write(sc, RAL_TXRX_CSR10, tmp);
}
void
ural_set_basicrates(struct ural_softc *sc)
{
struct ieee80211com *ic = &sc->sc_ic;
/* update basic rate set */
if (ic->ic_curmode == IEEE80211_MODE_11B) {
/* 11b basic rates: 1, 2Mbps */
ural_write(sc, RAL_TXRX_CSR11, 0x3);
} else {
/* 11b/g basic rates: 1, 2, 5.5, 11Mbps */
ural_write(sc, RAL_TXRX_CSR11, 0xf);
}
}
void
ural_set_bssid(struct ural_softc *sc, const uint8_t *bssid)
{
uint16_t tmp;
tmp = bssid[0] | bssid[1] << 8;
ural_write(sc, RAL_MAC_CSR5, tmp);
tmp = bssid[2] | bssid[3] << 8;
ural_write(sc, RAL_MAC_CSR6, tmp);
tmp = bssid[4] | bssid[5] << 8;
ural_write(sc, RAL_MAC_CSR7, tmp);
DPRINTF(("setting BSSID to %s\n", ether_sprintf((uint8_t *)bssid)));
}
void
ural_set_macaddr(struct ural_softc *sc, const uint8_t *addr)
{
uint16_t tmp;
tmp = addr[0] | addr[1] << 8;
ural_write(sc, RAL_MAC_CSR2, tmp);
tmp = addr[2] | addr[3] << 8;
ural_write(sc, RAL_MAC_CSR3, tmp);
tmp = addr[4] | addr[5] << 8;
ural_write(sc, RAL_MAC_CSR4, tmp);
DPRINTF(("setting MAC address to %s\n",
ether_sprintf((uint8_t *)addr)));
}
void
ural_update_promisc(struct ural_softc *sc)
{
struct ifnet *ifp = &sc->sc_ic.ic_if;
uint16_t tmp;
tmp = ural_read(sc, RAL_TXRX_CSR2);
tmp &= ~RAL_DROP_NOT_TO_ME;
if (!(ifp->if_flags & IFF_PROMISC))
tmp |= RAL_DROP_NOT_TO_ME;
ural_write(sc, RAL_TXRX_CSR2, tmp);
DPRINTF(("%s promiscuous mode\n", (ifp->if_flags & IFF_PROMISC) ?
"entering" : "leaving"));
}
const char *
ural_get_rf(int rev)
{
switch (rev) {
case RAL_RF_2522: return "RT2522";
case RAL_RF_2523: return "RT2523";
case RAL_RF_2524: return "RT2524";
case RAL_RF_2525: return "RT2525";
case RAL_RF_2525E: return "RT2525e";
case RAL_RF_2526: return "RT2526";
case RAL_RF_5222: return "RT5222";
default: return "unknown";
}
}
void
ural_read_eeprom(struct ural_softc *sc)
{
struct ieee80211com *ic = &sc->sc_ic;
uint16_t val;
/* retrieve MAC/BBP type */
ural_eeprom_read(sc, RAL_EEPROM_MACBBP, &val, 2);
sc->macbbp_rev = letoh16(val);
ural_eeprom_read(sc, RAL_EEPROM_CONFIG0, &val, 2);
val = letoh16(val);
sc->rf_rev = (val >> 11) & 0x7;
sc->hw_radio = (val >> 10) & 0x1;
sc->led_mode = (val >> 6) & 0x7;
sc->rx_ant = (val >> 4) & 0x3;
sc->tx_ant = (val >> 2) & 0x3;
sc->nb_ant = val & 0x3;
/* read MAC address */
ural_eeprom_read(sc, RAL_EEPROM_ADDRESS, ic->ic_myaddr, 6);
/* read default values for BBP registers */
ural_eeprom_read(sc, RAL_EEPROM_BBP_BASE, sc->bbp_prom, 2 * 16);
/* read Tx power for all b/g channels */
ural_eeprom_read(sc, RAL_EEPROM_TXPOWER, sc->txpow, 14);
}
int
ural_bbp_init(struct ural_softc *sc)
{
#define N(a) (sizeof (a) / sizeof ((a)[0]))
int i, ntries;
/* wait for BBP to be ready */
for (ntries = 0; ntries < 100; ntries++) {
if (ural_bbp_read(sc, RAL_BBP_VERSION) != 0)
break;
DELAY(1000);
}
if (ntries == 100) {
printf("%s: timeout waiting for BBP\n", sc->sc_dev.dv_xname);
return EIO;
}
/* initialize BBP registers to default values */
for (i = 0; i < N(ural_def_bbp); i++)
ural_bbp_write(sc, ural_def_bbp[i].reg, ural_def_bbp[i].val);
#if 0
/* initialize BBP registers to values stored in EEPROM */
for (i = 0; i < 16; i++) {
if (sc->bbp_prom[i].reg == 0xff)
continue;
ural_bbp_write(sc, sc->bbp_prom[i].reg, sc->bbp_prom[i].val);
}
#endif
return 0;
#undef N
}
void
ural_set_txantenna(struct ural_softc *sc, int antenna)
{
uint16_t tmp;
uint8_t tx;
tx = ural_bbp_read(sc, RAL_BBP_TX) & ~RAL_BBP_ANTMASK;
if (antenna == 1)
tx |= RAL_BBP_ANTA;
else if (antenna == 2)
tx |= RAL_BBP_ANTB;
else
tx |= RAL_BBP_DIVERSITY;
/* need to force I/Q flip for RF 2525e, 2526 and 5222 */
if (sc->rf_rev == RAL_RF_2525E || sc->rf_rev == RAL_RF_2526 ||
sc->rf_rev == RAL_RF_5222)
tx |= RAL_BBP_FLIPIQ;
ural_bbp_write(sc, RAL_BBP_TX, tx);
/* update flags in PHY_CSR5 and PHY_CSR6 too */
tmp = ural_read(sc, RAL_PHY_CSR5) & ~0x7;
ural_write(sc, RAL_PHY_CSR5, tmp | (tx & 0x7));
tmp = ural_read(sc, RAL_PHY_CSR6) & ~0x7;
ural_write(sc, RAL_PHY_CSR6, tmp | (tx & 0x7));
}
void
ural_set_rxantenna(struct ural_softc *sc, int antenna)
{
uint8_t rx;
rx = ural_bbp_read(sc, RAL_BBP_RX) & ~RAL_BBP_ANTMASK;
if (antenna == 1)
rx |= RAL_BBP_ANTA;
else if (antenna == 2)
rx |= RAL_BBP_ANTB;
else
rx |= RAL_BBP_DIVERSITY;
/* need to force no I/Q flip for RF 2525e and 2526 */
if (sc->rf_rev == RAL_RF_2525E || sc->rf_rev == RAL_RF_2526)
rx &= ~RAL_BBP_FLIPIQ;
ural_bbp_write(sc, RAL_BBP_RX, rx);
}
int
ural_init(struct ifnet *ifp)
{
#define N(a) (sizeof (a) / sizeof ((a)[0]))
struct ural_softc *sc = ifp->if_softc;
struct ieee80211com *ic = &sc->sc_ic;
uint16_t tmp;
usbd_status error;
int i, ntries;
ural_stop(ifp, 0);
/* initialize MAC registers to default values */
for (i = 0; i < N(ural_def_mac); i++)
ural_write(sc, ural_def_mac[i].reg, ural_def_mac[i].val);
/* wait for BBP and RF to wake up (this can take a long time!) */
for (ntries = 0; ntries < 100; ntries++) {
tmp = ural_read(sc, RAL_MAC_CSR17);
if ((tmp & (RAL_BBP_AWAKE | RAL_RF_AWAKE)) ==
(RAL_BBP_AWAKE | RAL_RF_AWAKE))
break;
DELAY(1000);
}
if (ntries == 100) {
printf("%s: timeout waiting for BBP/RF to wakeup\n",
sc->sc_dev.dv_xname);
error = EIO;
goto fail;
}
/* we're ready! */
ural_write(sc, RAL_MAC_CSR1, RAL_HOST_READY);
/* set basic rate set (will be updated later) */
ural_write(sc, RAL_TXRX_CSR11, 0x153);
error = ural_bbp_init(sc);
if (error != 0)
goto fail;
/* set default BSS channel */
ic->ic_bss->ni_chan = ic->ic_ibss_chan;
ural_set_chan(sc, ic->ic_bss->ni_chan);
/* clear statistic registers (STA_CSR0 to STA_CSR10) */
ural_read_multi(sc, RAL_STA_CSR0, sc->sta, sizeof sc->sta);
/* set default sensitivity */
ural_bbp_write(sc, 17, 0x48);
ural_set_txantenna(sc, 1);
ural_set_rxantenna(sc, 1);
IEEE80211_ADDR_COPY(ic->ic_myaddr, LLADDR(ifp->if_sadl));
ural_set_macaddr(sc, ic->ic_myaddr);
/*
* Copy WEP keys into adapter's memory (SEC_CSR0 to SEC_CSR31).
*/
for (i = 0; i < IEEE80211_WEP_NKID; i++) {
struct ieee80211_key *k = &ic->ic_nw_keys[i];
ural_write_multi(sc, RAL_SEC_CSR0 + i * IEEE80211_KEYBUF_SIZE,
k->k_key, IEEE80211_KEYBUF_SIZE);
}
/*
* Allocate xfer for AMRR statistics requests.
*/
sc->amrr_xfer = usbd_alloc_xfer(sc->sc_udev);
if (sc->amrr_xfer == NULL) {
printf("%s: could not allocate AMRR xfer\n",
sc->sc_dev.dv_xname);
goto fail;
}
/*
* Open Tx and Rx USB bulk pipes.
*/
error = usbd_open_pipe(sc->sc_iface, sc->sc_tx_no, USBD_EXCLUSIVE_USE,
&sc->sc_tx_pipeh);
if (error != 0) {
printf("%s: could not open Tx pipe: %s\n",
sc->sc_dev.dv_xname, usbd_errstr(error));
goto fail;
}
error = usbd_open_pipe(sc->sc_iface, sc->sc_rx_no, USBD_EXCLUSIVE_USE,
&sc->sc_rx_pipeh);
if (error != 0) {
printf("%s: could not open Rx pipe: %s\n",
sc->sc_dev.dv_xname, usbd_errstr(error));
goto fail;
}
/*
* Allocate Tx and Rx xfer queues.
*/
error = ural_alloc_tx_list(sc);
if (error != 0) {
printf("%s: could not allocate Tx list\n",
sc->sc_dev.dv_xname);
goto fail;
}
error = ural_alloc_rx_list(sc);
if (error != 0) {
printf("%s: could not allocate Rx list\n",
sc->sc_dev.dv_xname);
goto fail;
}
/*
* Start up the receive pipe.
*/
for (i = 0; i < RAL_RX_LIST_COUNT; i++) {
struct ural_rx_data *data = &sc->rx_data[i];
usbd_setup_xfer(data->xfer, sc->sc_rx_pipeh, data, data->buf,
MCLBYTES, USBD_SHORT_XFER_OK, USBD_NO_TIMEOUT, ural_rxeof);
error = usbd_transfer(data->xfer);
if (error != 0 && error != USBD_IN_PROGRESS) {
printf("%s: could not queue Rx transfer\n",
sc->sc_dev.dv_xname);
goto fail;
}
}
/* kick Rx */
tmp = RAL_DROP_PHY_ERROR | RAL_DROP_CRC_ERROR;
if (ic->ic_opmode != IEEE80211_M_MONITOR) {
tmp |= RAL_DROP_CTL | RAL_DROP_VERSION_ERROR;
if (ic->ic_opmode != IEEE80211_M_HOSTAP)
tmp |= RAL_DROP_TODS;
if (!(ifp->if_flags & IFF_PROMISC))
tmp |= RAL_DROP_NOT_TO_ME;
}
ural_write(sc, RAL_TXRX_CSR2, tmp);
ifp->if_flags &= ~IFF_OACTIVE;
ifp->if_flags |= IFF_RUNNING;
if (ic->ic_opmode == IEEE80211_M_MONITOR)
ieee80211_new_state(ic, IEEE80211_S_RUN, -1);
else
ieee80211_new_state(ic, IEEE80211_S_SCAN, -1);
return 0;
fail: ural_stop(ifp, 1);
return error;
#undef N
}
void
ural_stop(struct ifnet *ifp, int disable)
{
struct ural_softc *sc = ifp->if_softc;
struct ieee80211com *ic = &sc->sc_ic;
sc->sc_tx_timer = 0;
ifp->if_timer = 0;
ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
ieee80211_new_state(ic, IEEE80211_S_INIT, -1); /* free all nodes */
/* disable Rx */
ural_write(sc, RAL_TXRX_CSR2, RAL_DISABLE_RX);
/* reset ASIC and BBP (but won't reset MAC registers!) */
ural_write(sc, RAL_MAC_CSR1, RAL_RESET_ASIC | RAL_RESET_BBP);
ural_write(sc, RAL_MAC_CSR1, 0);
if (sc->amrr_xfer != NULL) {
usbd_free_xfer(sc->amrr_xfer);
sc->amrr_xfer = NULL;
}
if (sc->sc_rx_pipeh != NULL) {
usbd_abort_pipe(sc->sc_rx_pipeh);
usbd_close_pipe(sc->sc_rx_pipeh);
sc->sc_rx_pipeh = NULL;
}
if (sc->sc_tx_pipeh != NULL) {
usbd_abort_pipe(sc->sc_tx_pipeh);
usbd_close_pipe(sc->sc_tx_pipeh);
sc->sc_tx_pipeh = NULL;
}
ural_free_rx_list(sc);
ural_free_tx_list(sc);
}
void
ural_newassoc(struct ieee80211com *ic, struct ieee80211_node *ni, int isnew)
{
/* start with lowest Tx rate */
ni->ni_txrate = 0;
}
void
ural_amrr_start(struct ural_softc *sc, struct ieee80211_node *ni)
{
int i;
/* clear statistic registers (STA_CSR0 to STA_CSR10) */
ural_read_multi(sc, RAL_STA_CSR0, sc->sta, sizeof sc->sta);
ieee80211_amrr_node_init(&sc->amrr, &sc->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;
timeout_add(&sc->amrr_to, hz);
}
void
ural_amrr_timeout(void *arg)
{
struct ural_softc *sc = arg;
usb_device_request_t req;
int s;
s = splusb();
/*
* Asynchronously read statistic registers (cleared by read).
*/
req.bmRequestType = UT_READ_VENDOR_DEVICE;
req.bRequest = RAL_READ_MULTI_MAC;
USETW(req.wValue, 0);
USETW(req.wIndex, RAL_STA_CSR0);
USETW(req.wLength, sizeof sc->sta);
usbd_setup_default_xfer(sc->amrr_xfer, sc->sc_udev, sc,
USBD_DEFAULT_TIMEOUT, &req, sc->sta, sizeof sc->sta, 0,
ural_amrr_update);
(void)usbd_transfer(sc->amrr_xfer);
splx(s);
}
void
ural_amrr_update(usbd_xfer_handle xfer, usbd_private_handle priv,
usbd_status status)
{
struct ural_softc *sc = (struct ural_softc *)priv;
struct ifnet *ifp = &sc->sc_ic.ic_if;
if (status != USBD_NORMAL_COMPLETION) {
printf("%s: could not retrieve Tx statistics - cancelling "
"automatic rate control\n", sc->sc_dev.dv_xname);
return;
}
/* count TX retry-fail as Tx errors */
ifp->if_oerrors += letoh16(sc->sta[9]);
sc->amn.amn_retrycnt =
letoh16(sc->sta[7]) + /* TX one-retry ok count */
letoh16(sc->sta[8]) + /* TX more-retry ok count */
letoh16(sc->sta[9]); /* TX retry-fail count */
sc->amn.amn_txcnt =
sc->amn.amn_retrycnt +
letoh16(sc->sta[6]); /* TX no-retry ok count */
ieee80211_amrr_choose(&sc->amrr, sc->sc_ic.ic_bss, &sc->amn);
timeout_add(&sc->amrr_to, hz);
}
int
ural_activate(struct device *self, enum devact act)
{
switch (act) {
case DVACT_ACTIVATE:
break;
case DVACT_DEACTIVATE:
break;
}
return 0;
}
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