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freebsd-nq/sys/dev/usb/if_ural.c
Ian Dowse 9145721957 Use a different task queue for host controller and peripheral driver 
tasks. Since the host controllers rely on tasks to process transfer
timeouts, if a synchronous transfer from a driver was invoked from
a task and timed out, it would never complete because the single
task thread was stuck performing the synchronous transfer so couldn't
process the timeout.

This affected the axe, udav and ural drivers.

Problem hardware provided by:	guido
2006-10-19 01:15:58 +00:00

2521 lines
63 KiB
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Raw Blame History

/* $FreeBSD$ */
/*-
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*-
* Ralink Technology RT2500USB chipset driver
* http://www.ralinktech.com/
*/
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <net/bpf.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <net/ethernet.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_radiotap.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/if_ether.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include "usbdevs.h"
#include <dev/usb/if_uralreg.h>
#include <dev/usb/if_uralvar.h>
#ifdef USB_DEBUG
#define DPRINTF(x) do { if (uraldebug > 0) logprintf x; } while (0)
#define DPRINTFN(n, x) do { if (uraldebug >= (n)) logprintf x; } while (0)
int uraldebug = 0;
SYSCTL_NODE(_hw_usb, OID_AUTO, ural, CTLFLAG_RW, 0, "USB ural");
SYSCTL_INT(_hw_usb_ural, OID_AUTO, debug, CTLFLAG_RW, &uraldebug, 0,
"ural debug level");
#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_WL167G },
{ USB_VENDOR_ASUS, USB_PRODUCT_RALINK_RT2570 },
{ USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5D7050 },
{ USB_VENDOR_CONCEPTRONIC, USB_PRODUCT_CONCEPTRONIC_C54U },
{ USB_VENDOR_DLINK, USB_PRODUCT_DLINK_DWLG122 },
{ USB_VENDOR_GIGABYTE, USB_PRODUCT_GIGABYTE_GNWBKG },
{ USB_VENDOR_GUILLEMOT, USB_PRODUCT_GUILLEMOT_HWGUSB254 },
{ USB_VENDOR_LINKSYS4, USB_PRODUCT_LINKSYS4_WUSB54G },
{ USB_VENDOR_LINKSYS4, USB_PRODUCT_LINKSYS4_WUSB54GP },
{ USB_VENDOR_LINKSYS4, USB_PRODUCT_LINKSYS4_HU200TS },
{ 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_NV902 },
{ USB_VENDOR_RALINK, USB_PRODUCT_RALINK_RT2570 },
{ USB_VENDOR_RALINK, USB_PRODUCT_RALINK_RT2570_2 },
{ USB_VENDOR_VTECH, USB_PRODUCT_VTECH_RT2570 },
{ USB_VENDOR_ZINWELL, USB_PRODUCT_ZINWELL_RT2570 }
};
MODULE_DEPEND(ural, wlan, 1, 1, 1);
static int ural_alloc_tx_list(struct ural_softc *);
static void ural_free_tx_list(struct ural_softc *);
static int ural_alloc_rx_list(struct ural_softc *);
static void ural_free_rx_list(struct ural_softc *);
static int ural_media_change(struct ifnet *);
static void ural_next_scan(void *);
static void ural_task(void *);
static int ural_newstate(struct ieee80211com *,
enum ieee80211_state, int);
static int ural_rxrate(struct ural_rx_desc *);
static void ural_txeof(usbd_xfer_handle, usbd_private_handle,
usbd_status);
static void ural_rxeof(usbd_xfer_handle, usbd_private_handle,
usbd_status);
static int ural_ack_rate(struct ieee80211com *, int);
static uint16_t ural_txtime(int, int, uint32_t);
static uint8_t ural_plcp_signal(int);
static void ural_setup_tx_desc(struct ural_softc *,
struct ural_tx_desc *, uint32_t, int, int);
static int ural_tx_bcn(struct ural_softc *, struct mbuf *,
struct ieee80211_node *);
static int ural_tx_mgt(struct ural_softc *, struct mbuf *,
struct ieee80211_node *);
static int ural_tx_data(struct ural_softc *, struct mbuf *,
struct ieee80211_node *);
static void ural_start(struct ifnet *);
static void ural_watchdog(struct ifnet *);
static int ural_reset(struct ifnet *);
static int ural_ioctl(struct ifnet *, u_long, caddr_t);
static void ural_set_testmode(struct ural_softc *);
static void ural_eeprom_read(struct ural_softc *, uint16_t, void *,
int);
static uint16_t ural_read(struct ural_softc *, uint16_t);
static void ural_read_multi(struct ural_softc *, uint16_t, void *,
int);
static void ural_write(struct ural_softc *, uint16_t, uint16_t);
static void ural_write_multi(struct ural_softc *, uint16_t, void *,
int);
static void ural_bbp_write(struct ural_softc *, uint8_t, uint8_t);
static uint8_t ural_bbp_read(struct ural_softc *, uint8_t);
static void ural_rf_write(struct ural_softc *, uint8_t, uint32_t);
static void ural_set_chan(struct ural_softc *,
struct ieee80211_channel *);
static void ural_disable_rf_tune(struct ural_softc *);
static void ural_enable_tsf_sync(struct ural_softc *);
static void ural_update_slot(struct ifnet *);
static void ural_set_txpreamble(struct ural_softc *);
static void ural_set_basicrates(struct ural_softc *);
static void ural_set_bssid(struct ural_softc *, uint8_t *);
static void ural_set_macaddr(struct ural_softc *, uint8_t *);
static void ural_update_promisc(struct ural_softc *);
static const char *ural_get_rf(int);
static void ural_read_eeprom(struct ural_softc *);
static int ural_bbp_init(struct ural_softc *);
static void ural_set_txantenna(struct ural_softc *, int);
static void ural_set_rxantenna(struct ural_softc *, int);
static void ural_init(void *);
static void ural_stop(void *);
static int ural_raw_xmit(struct ieee80211_node *, struct mbuf *,
const struct ieee80211_bpf_params *);
static void ural_amrr_start(struct ural_softc *,
struct ieee80211_node *);
static void ural_amrr_timeout(void *);
static void ural_amrr_update(usbd_xfer_handle, usbd_private_handle,
usbd_status status);
static void ural_ratectl(struct ural_amrr *,
struct ieee80211_node *);
/*
* Supported rates for 802.11a/b/g modes (in 500Kbps unit).
*/
static const struct ieee80211_rateset ural_rateset_11a =
{ 8, { 12, 18, 24, 36, 48, 72, 96, 108 } };
static const struct ieee80211_rateset ural_rateset_11b =
{ 4, { 2, 4, 11, 22 } };
static const struct ieee80211_rateset ural_rateset_11g =
{ 12, { 2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108 } };
/*
* Default values for MAC registers; values taken from the reference driver.
*/
static const struct {
uint16_t reg;
uint16_t val;
} ural_def_mac[] = {
{ RAL_TXRX_CSR5, 0x8c8d },
{ RAL_TXRX_CSR6, 0x8b8a },
{ RAL_TXRX_CSR7, 0x8687 },
{ RAL_TXRX_CSR8, 0x0085 },
{ RAL_MAC_CSR13, 0x1111 },
{ RAL_MAC_CSR14, 0x1e11 },
{ RAL_TXRX_CSR21, 0xe78f },
{ RAL_MAC_CSR9, 0xff1d },
{ RAL_MAC_CSR11, 0x0002 },
{ RAL_MAC_CSR22, 0x0053 },
{ RAL_MAC_CSR15, 0x0000 },
{ RAL_MAC_CSR8, 0x0780 },
{ RAL_TXRX_CSR19, 0x0000 },
{ RAL_TXRX_CSR18, 0x005a },
{ RAL_PHY_CSR2, 0x0000 },
{ RAL_TXRX_CSR0, 0x1ec0 },
{ RAL_PHY_CSR4, 0x000f }
};
/*
* Default values for BBP registers; values taken from the reference driver.
*/
static const struct {
uint8_t reg;
uint8_t val;
} ural_def_bbp[] = {
{ 3, 0x02 },
{ 4, 0x19 },
{ 14, 0x1c },
{ 15, 0x30 },
{ 16, 0xac },
{ 17, 0x48 },
{ 18, 0x18 },
{ 19, 0xff },
{ 20, 0x1e },
{ 21, 0x08 },
{ 22, 0x08 },
{ 23, 0x08 },
{ 24, 0x80 },
{ 25, 0x50 },
{ 26, 0x08 },
{ 27, 0x23 },
{ 30, 0x10 },
{ 31, 0x2b },
{ 32, 0xb9 },
{ 34, 0x12 },
{ 35, 0x50 },
{ 39, 0xc4 },
{ 40, 0x02 },
{ 41, 0x60 },
{ 53, 0x10 },
{ 54, 0x18 },
{ 56, 0x08 },
{ 57, 0x10 },
{ 58, 0x08 },
{ 61, 0x60 },
{ 62, 0x10 },
{ 75, 0xff }
};
/*
* Default values for RF register R2 indexed by channel numbers.
*/
static const uint32_t ural_rf2522_r2[] = {
0x307f6, 0x307fb, 0x30800, 0x30805, 0x3080a, 0x3080f, 0x30814,
0x30819, 0x3081e, 0x30823, 0x30828, 0x3082d, 0x30832, 0x3083e
};
static const uint32_t ural_rf2523_r2[] = {
0x00327, 0x00328, 0x00329, 0x0032a, 0x0032b, 0x0032c, 0x0032d,
0x0032e, 0x0032f, 0x00340, 0x00341, 0x00342, 0x00343, 0x00346
};
static const uint32_t ural_rf2524_r2[] = {
0x00327, 0x00328, 0x00329, 0x0032a, 0x0032b, 0x0032c, 0x0032d,
0x0032e, 0x0032f, 0x00340, 0x00341, 0x00342, 0x00343, 0x00346
};
static const uint32_t ural_rf2525_r2[] = {
0x20327, 0x20328, 0x20329, 0x2032a, 0x2032b, 0x2032c, 0x2032d,
0x2032e, 0x2032f, 0x20340, 0x20341, 0x20342, 0x20343, 0x20346
};
static const uint32_t ural_rf2525_hi_r2[] = {
0x2032f, 0x20340, 0x20341, 0x20342, 0x20343, 0x20344, 0x20345,
0x20346, 0x20347, 0x20348, 0x20349, 0x2034a, 0x2034b, 0x2034e
};
static const uint32_t ural_rf2525e_r2[] = {
0x2044d, 0x2044e, 0x2044f, 0x20460, 0x20461, 0x20462, 0x20463,
0x20464, 0x20465, 0x20466, 0x20467, 0x20468, 0x20469, 0x2046b
};
static const uint32_t ural_rf2526_hi_r2[] = {
0x0022a, 0x0022b, 0x0022b, 0x0022c, 0x0022c, 0x0022d, 0x0022d,
0x0022e, 0x0022e, 0x0022f, 0x0022d, 0x00240, 0x00240, 0x00241
};
static const uint32_t ural_rf2526_r2[] = {
0x00226, 0x00227, 0x00227, 0x00228, 0x00228, 0x00229, 0x00229,
0x0022a, 0x0022a, 0x0022b, 0x0022b, 0x0022c, 0x0022c, 0x0022d
};
/*
* For dual-band RF, RF registers R1 and R4 also depend on channel number;
* values taken from the reference driver.
*/
static const struct {
uint8_t chan;
uint32_t r1;
uint32_t r2;
uint32_t r4;
} ural_rf5222[] = {
{ 1, 0x08808, 0x0044d, 0x00282 },
{ 2, 0x08808, 0x0044e, 0x00282 },
{ 3, 0x08808, 0x0044f, 0x00282 },
{ 4, 0x08808, 0x00460, 0x00282 },
{ 5, 0x08808, 0x00461, 0x00282 },
{ 6, 0x08808, 0x00462, 0x00282 },
{ 7, 0x08808, 0x00463, 0x00282 },
{ 8, 0x08808, 0x00464, 0x00282 },
{ 9, 0x08808, 0x00465, 0x00282 },
{ 10, 0x08808, 0x00466, 0x00282 },
{ 11, 0x08808, 0x00467, 0x00282 },
{ 12, 0x08808, 0x00468, 0x00282 },
{ 13, 0x08808, 0x00469, 0x00282 },
{ 14, 0x08808, 0x0046b, 0x00286 },
{ 36, 0x08804, 0x06225, 0x00287 },
{ 40, 0x08804, 0x06226, 0x00287 },
{ 44, 0x08804, 0x06227, 0x00287 },
{ 48, 0x08804, 0x06228, 0x00287 },
{ 52, 0x08804, 0x06229, 0x00287 },
{ 56, 0x08804, 0x0622a, 0x00287 },
{ 60, 0x08804, 0x0622b, 0x00287 },
{ 64, 0x08804, 0x0622c, 0x00287 },
{ 100, 0x08804, 0x02200, 0x00283 },
{ 104, 0x08804, 0x02201, 0x00283 },
{ 108, 0x08804, 0x02202, 0x00283 },
{ 112, 0x08804, 0x02203, 0x00283 },
{ 116, 0x08804, 0x02204, 0x00283 },
{ 120, 0x08804, 0x02205, 0x00283 },
{ 124, 0x08804, 0x02206, 0x00283 },
{ 128, 0x08804, 0x02207, 0x00283 },
{ 132, 0x08804, 0x02208, 0x00283 },
{ 136, 0x08804, 0x02209, 0x00283 },
{ 140, 0x08804, 0x0220a, 0x00283 },
{ 149, 0x08808, 0x02429, 0x00281 },
{ 153, 0x08808, 0x0242b, 0x00281 },
{ 157, 0x08808, 0x0242d, 0x00281 },
{ 161, 0x08808, 0x0242f, 0x00281 }
};
USB_DECLARE_DRIVER(ural);
USB_MATCH(ural)
{
USB_MATCH_START(ural, uaa);
if (uaa->iface != NULL)
return UMATCH_NONE;
return (usb_lookup(ural_devs, uaa->vendor, uaa->product) != NULL) ?
UMATCH_VENDOR_PRODUCT : UMATCH_NONE;
}
USB_ATTACH(ural)
{
USB_ATTACH_START(ural, sc, uaa);
struct ifnet *ifp;
struct ieee80211com *ic = &sc->sc_ic;
usb_interface_descriptor_t *id;
usb_endpoint_descriptor_t *ed;
usbd_status error;
char devinfo[1024];
int i;
sc->sc_udev = uaa->device;
usbd_devinfo(sc->sc_udev, 0, devinfo);
USB_ATTACH_SETUP;
if (usbd_set_config_no(sc->sc_udev, RAL_CONFIG_NO, 0) != 0) {
printf("%s: could not set configuration no\n",
device_get_nameunit(sc->sc_dev));
USB_ATTACH_ERROR_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",
device_get_nameunit(sc->sc_dev));
USB_ATTACH_ERROR_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 %d\n",
device_get_nameunit(sc->sc_dev), i);
USB_ATTACH_ERROR_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", device_get_nameunit(sc->sc_dev));
USB_ATTACH_ERROR_RETURN;
}
mtx_init(&sc->sc_mtx, device_get_nameunit(sc->sc_dev), MTX_NETWORK_LOCK,
MTX_DEF | MTX_RECURSE);
usb_init_task(&sc->sc_task, ural_task, sc);
callout_init(&sc->scan_ch, debug_mpsafenet ? CALLOUT_MPSAFE : 0);
callout_init(&sc->amrr_ch, 0);
/* 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 RT2570 (rev 0x%02x), RF %s\n",
device_get_nameunit(sc->sc_dev), sc->asic_rev, ural_get_rf(sc->rf_rev));
ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
if (ifp == NULL) {
printf("%s: can not if_alloc()\n", device_get_nameunit(sc->sc_dev));
USB_ATTACH_ERROR_RETURN;
}
ifp->if_softc = sc;
if_initname(ifp, "ural", device_get_unit(sc->sc_dev));
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST |
IFF_NEEDSGIANT; /* USB stack is still under Giant lock */
ifp->if_init = ural_init;
ifp->if_ioctl = ural_ioctl;
ifp->if_start = ural_start;
ifp->if_watchdog = ural_watchdog;
IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN);
ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN;
IFQ_SET_READY(&ifp->if_snd);
ic->ic_ifp = ifp;
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_WPA; /* 802.11i */
if (sc->rf_rev == RAL_RF_5222) {
/* set supported .11a rates */
ic->ic_sup_rates[IEEE80211_MODE_11A] = ural_rateset_11a;
/* set supported .11a channels */
for (i = 36; i <= 64; i += 4) {
ic->ic_channels[i].ic_freq =
ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ);
ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A;
}
for (i = 100; i <= 140; i += 4) {
ic->ic_channels[i].ic_freq =
ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ);
ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A;
}
for (i = 149; i <= 161; i += 4) {
ic->ic_channels[i].ic_freq =
ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ);
ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A;
}
}
/* set supported .11b and .11g rates */
ic->ic_sup_rates[IEEE80211_MODE_11B] = ural_rateset_11b;
ic->ic_sup_rates[IEEE80211_MODE_11G] = ural_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;
}
ieee80211_ifattach(ic);
ic->ic_reset = ural_reset;
/* enable s/w bmiss handling in sta mode */
ic->ic_flags_ext |= IEEE80211_FEXT_SWBMISS;
/* override state transition machine */
sc->sc_newstate = ic->ic_newstate;
ic->ic_newstate = ural_newstate;
ic->ic_raw_xmit = ural_raw_xmit;
ieee80211_media_init(ic, ural_media_change, ieee80211_media_status);
bpfattach2(ifp, DLT_IEEE802_11_RADIO,
sizeof (struct ieee80211_frame) + 64, &sc->sc_drvbpf);
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);
if (bootverbose)
ieee80211_announce(ic);
USB_ATTACH_SUCCESS_RETURN;
}
USB_DETACH(ural)
{
USB_DETACH_START(ural, sc);
struct ieee80211com *ic = &sc->sc_ic;
struct ifnet *ifp = ic->ic_ifp;
ural_stop(sc);
usb_rem_task(sc->sc_udev, &sc->sc_task);
callout_stop(&sc->scan_ch);
callout_stop(&sc->amrr_ch);
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);
bpfdetach(ifp);
ieee80211_ifdetach(ic);
if_free(ifp);
mtx_destroy(&sc->sc_mtx);
return 0;
}
static int
ural_alloc_tx_list(struct ural_softc *sc)
{
struct ural_tx_data *data;
int i, error;
sc->tx_queued = 0;
for (i = 0; i < RAL_TX_LIST_COUNT; i++) {
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",
device_get_nameunit(sc->sc_dev));
error = ENOMEM;
goto fail;
}
data->buf = usbd_alloc_buffer(data->xfer,
RAL_TX_DESC_SIZE + MCLBYTES);
if (data->buf == NULL) {
printf("%s: could not allocate tx buffer\n",
device_get_nameunit(sc->sc_dev));
error = ENOMEM;
goto fail;
}
}
return 0;
fail: ural_free_tx_list(sc);
return error;
}
static void
ural_free_tx_list(struct ural_softc *sc)
{
struct ural_tx_data *data;
int i;
for (i = 0; i < RAL_TX_LIST_COUNT; i++) {
data = &sc->tx_data[i];
if (data->xfer != NULL) {
usbd_free_xfer(data->xfer);
data->xfer = NULL;
}
if (data->ni != NULL) {
ieee80211_free_node(data->ni);
data->ni = NULL;
}
}
}
static int
ural_alloc_rx_list(struct ural_softc *sc)
{
struct ural_rx_data *data;
int i, error;
for (i = 0; i < RAL_RX_LIST_COUNT; i++) {
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",
device_get_nameunit(sc->sc_dev));
error = ENOMEM;
goto fail;
}
if (usbd_alloc_buffer(data->xfer, MCLBYTES) == NULL) {
printf("%s: could not allocate rx buffer\n",
device_get_nameunit(sc->sc_dev));
error = ENOMEM;
goto fail;
}
data->m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
if (data->m == NULL) {
printf("%s: could not allocate rx mbuf\n",
device_get_nameunit(sc->sc_dev));
error = ENOMEM;
goto fail;
}
data->buf = mtod(data->m, uint8_t *);
}
return 0;
fail: ural_free_tx_list(sc);
return error;
}
static void
ural_free_rx_list(struct ural_softc *sc)
{
struct ural_rx_data *data;
int i;
for (i = 0; i < RAL_RX_LIST_COUNT; i++) {
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;
}
}
}
static int
ural_media_change(struct ifnet *ifp)
{
struct ural_softc *sc = ifp->if_softc;
int error;
RAL_LOCK(sc);
error = ieee80211_media_change(ifp);
if (error != ENETRESET) {
RAL_UNLOCK(sc);
return error;
}
if ((ifp->if_flags & IFF_UP) &&
(ifp->if_drv_flags & IFF_DRV_RUNNING))
ural_init(sc);
RAL_UNLOCK(sc);
return 0;
}
/*
* This function is called periodically (every 200ms) during scanning to
* switch from one channel to another.
*/
static void
ural_next_scan(void *arg)
{
struct ural_softc *sc = arg;
struct ieee80211com *ic = &sc->sc_ic;
if (ic->ic_state == IEEE80211_S_SCAN)
ieee80211_next_scan(ic);
}
static 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_curchan);
callout_reset(&sc->scan_ch, hz / 5, ural_next_scan, sc);
break;
case IEEE80211_S_AUTH:
ural_set_chan(sc, ic->ic_curchan);
break;
case IEEE80211_S_ASSOC:
ural_set_chan(sc, ic->ic_curchan);
break;
case IEEE80211_S_RUN:
ural_set_chan(sc, ic->ic_curchan);
ni = ic->ic_bss;
if (ic->ic_opmode != IEEE80211_M_MONITOR) {
ural_update_slot(ic->ic_ifp);
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, &sc->sc_bo);
if (m == NULL) {
printf("%s: could not allocate beacon\n",
device_get_nameunit(sc->sc_dev));
return;
}
if (ural_tx_bcn(sc, m, ni) != 0) {
printf("%s: could not send beacon\n",
device_get_nameunit(sc->sc_dev));
return;
}
}
/* 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);
/* enable automatic rate adaptation in STA mode */
if (ic->ic_opmode == IEEE80211_M_STA &&
ic->ic_fixed_rate == IEEE80211_FIXED_RATE_NONE)
ural_amrr_start(sc, ni);
break;
}
sc->sc_newstate(ic, sc->sc_state, -1);
}
static int
ural_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg)
{
struct ural_softc *sc = ic->ic_ifp->if_softc;
usb_rem_task(sc->sc_udev, &sc->sc_task);
callout_stop(&sc->scan_ch);
callout_stop(&sc->amrr_ch);
/* do it in a process context */
sc->sc_state = nstate;
usb_add_task(sc->sc_udev, &sc->sc_task, USB_TASKQ_DRIVER);
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 */
/*
* This function is only used by the Rx radiotap code.
*/
static int
ural_rxrate(struct ural_rx_desc *desc)
{
if (le32toh(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 */
}
static 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 ifnet *ifp = sc->sc_ic.ic_ifp;
if (status != USBD_NORMAL_COMPLETION) {
if (status == USBD_NOT_STARTED || status == USBD_CANCELLED)
return;
printf("%s: could not transmit buffer: %s\n",
device_get_nameunit(sc->sc_dev), usbd_errstr(status));
if (status == USBD_STALLED)
usbd_clear_endpoint_stall_async(sc->sc_rx_pipeh);
ifp->if_oerrors++;
return;
}
m_freem(data->m);
data->m = NULL;
ieee80211_free_node(data->ni);
data->ni = NULL;
sc->tx_queued--;
ifp->if_opackets++;
DPRINTFN(10, ("tx done\n"));
sc->sc_tx_timer = 0;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
ural_start(ifp);
}
static 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_ifp;
struct ural_rx_desc *desc;
struct ieee80211_frame *wh;
struct ieee80211_node *ni;
struct mbuf *mnew, *m;
int 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", device_get_nameunit(sc->sc_dev),
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 ((le32toh(desc->flags) & RAL_RX_PHY_ERROR) ||
(le32toh(desc->flags) & 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;
}
mnew = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
if (mnew == NULL) {
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 = (le32toh(desc->flags) >> 16) & 0xfff;
m->m_flags |= M_HASFCS; /* h/w leaves FCS */
if (bpf_peers_present(sc->sc_drvbpf)) {
struct ural_rx_radiotap_header *tap = &sc->sc_rxtap;
tap->wr_flags = IEEE80211_RADIOTAP_F_FCS;
tap->wr_rate = ural_rxrate(desc);
tap->wr_chan_freq = htole16(ic->ic_curchan->ic_freq);
tap->wr_chan_flags = htole16(ic->ic_curchan->ic_flags);
tap->wr_antenna = sc->rx_ant;
tap->wr_antsignal = desc->rssi;
bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_rxtap_len, m);
}
wh = mtod(m, struct ieee80211_frame *);
ni = ieee80211_find_rxnode(ic, (struct ieee80211_frame_min *)wh);
/* send the frame to the 802.11 layer */
ieee80211_input(ic, m, ni, desc->rssi, 0);
/* node is no longer needed */
ieee80211_free_node(ni);
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);
usbd_transfer(xfer);
}
/*
* Return the expected ack rate for a frame transmitted at rate `rate'.
* XXX: this should depend on the destination node basic rate set.
*/
static 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.
*/
static uint16_t
ural_txtime(int len, int rate, uint32_t flags)
{
uint16_t txtime;
if (RAL_RATE_IS_OFDM(rate)) {
/* IEEE Std 802.11a-1999, pp. 37 */
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;
}
static 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;
}
}
static 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(RAL_TX_NEWSEQ);
desc->flags |= htole32(len << 16);
desc->wme = htole16(RAL_AIFSN(2) | RAL_LOGCWMIN(3) | RAL_LOGCWMAX(5));
desc->wme |= htole16(RAL_IVOFFSET(sizeof (struct ieee80211_frame)));
/* 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
static int
ural_tx_bcn(struct ural_softc *sc, struct mbuf *m0, struct ieee80211_node *ni)
{
struct ural_tx_desc *desc;
usbd_xfer_handle xfer;
uint8_t cmd = 0;
usbd_status error;
uint8_t *buf;
int xferlen, rate;
rate = IEEE80211_IS_CHAN_5GHZ(ni->ni_chan) ? 12 : 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;
}
static int
ural_tx_mgt(struct ural_softc *sc, struct mbuf *m0, struct ieee80211_node *ni)
{
struct ieee80211com *ic = &sc->sc_ic;
struct ural_tx_desc *desc;
struct ural_tx_data *data;
struct ieee80211_frame *wh;
uint32_t flags = 0;
uint16_t dur;
usbd_status error;
int xferlen, rate;
data = &sc->tx_data[0];
desc = (struct ural_tx_desc *)data->buf;
rate = IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan) ? 12 : 2;
data->m = m0;
data->ni = ni;
wh = mtod(m0, struct ieee80211_frame *);
if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
flags |= RAL_TX_ACK;
dur = ural_txtime(RAL_ACK_SIZE, rate, ic->ic_flags) + RAL_SIFS;
*(uint16_t *)wh->i_dur = htole16(dur);
/* tell hardware to add timestamp for probe responses */
if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) ==
IEEE80211_FC0_TYPE_MGT &&
(wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) ==
IEEE80211_FC0_SUBTYPE_PROBE_RESP)
flags |= RAL_TX_TIMESTAMP;
}
if (bpf_peers_present(sc->sc_drvbpf)) {
struct ural_tx_radiotap_header *tap = &sc->sc_txtap;
tap->wt_flags = 0;
tap->wt_rate = rate;
tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq);
tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags);
tap->wt_antenna = sc->tx_ant;
bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0);
}
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 mgt frame len=%u rate=%u xfer len=%u\n",
m0->m_pkthdr.len, rate, xferlen));
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 != USBD_NORMAL_COMPLETION && error != USBD_IN_PROGRESS)
return error;
sc->tx_queued++;
return 0;
}
static int
ural_tx_raw(struct ural_softc *sc, struct mbuf *m0, struct ieee80211_node *ni,
const struct ieee80211_bpf_params *params)
{
struct ieee80211com *ic = &sc->sc_ic;
struct ural_tx_desc *desc;
struct ural_tx_data *data;
uint32_t flags;
usbd_status error;
int xferlen, rate;
data = &sc->tx_data[0];
desc = (struct ural_tx_desc *)data->buf;
rate = params->ibp_rate0 & IEEE80211_RATE_VAL;
/* XXX validate */
if (rate == 0)
return EINVAL;
if (bpf_peers_present(sc->sc_drvbpf)) {
struct ural_tx_radiotap_header *tap = &sc->sc_txtap;
tap->wt_flags = 0;
tap->wt_rate = rate;
tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq);
tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags);
tap->wt_antenna = sc->tx_ant;
bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0);
}
data->m = m0;
data->ni = ni;
flags = 0;
if ((params->ibp_flags & IEEE80211_BPF_NOACK) == 0)
flags |= RAL_TX_ACK;
m_copydata(m0, 0, m0->m_pkthdr.len, data->buf + RAL_TX_DESC_SIZE);
/* XXX need to setup descriptor ourself */
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 raw frame len=%u rate=%u xfer len=%u\n",
m0->m_pkthdr.len, rate, xferlen));
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 != USBD_NORMAL_COMPLETION && error != USBD_IN_PROGRESS)
return error;
sc->tx_queued++;
return 0;
}
static int
ural_tx_data(struct ural_softc *sc, struct mbuf *m0, struct ieee80211_node *ni)
{
struct ieee80211com *ic = &sc->sc_ic;
struct ural_tx_desc *desc;
struct ural_tx_data *data;
struct ieee80211_frame *wh;
struct ieee80211_key *k;
uint32_t flags = 0;
uint16_t dur;
usbd_status error;
int xferlen, rate;
wh = mtod(m0, struct ieee80211_frame *);
if (ic->ic_fixed_rate != IEEE80211_FIXED_RATE_NONE)
rate = ic->ic_bss->ni_rates.rs_rates[ic->ic_fixed_rate];
else
rate = ni->ni_rates.rs_rates[ni->ni_txrate];
rate &= IEEE80211_RATE_VAL;
if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
k = ieee80211_crypto_encap(ic, ni, m0);
if (k == NULL) {
m_freem(m0);
return ENOBUFS;
}
/* packet header may have moved, reset our local pointer */
wh = mtod(m0, struct ieee80211_frame *);
}
data = &sc->tx_data[0];
desc = (struct ural_tx_desc *)data->buf;
data->m = m0;
data->ni = ni;
if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
flags |= RAL_TX_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);
}
if (bpf_peers_present(sc->sc_drvbpf)) {
struct ural_tx_radiotap_header *tap = &sc->sc_txtap;
tap->wt_flags = 0;
tap->wt_rate = rate;
tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq);
tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags);
tap->wt_antenna = sc->tx_ant;
bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0);
}
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 data frame len=%u rate=%u xfer len=%u\n",
m0->m_pkthdr.len, rate, xferlen));
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 != USBD_NORMAL_COMPLETION && error != USBD_IN_PROGRESS)
return error;
sc->tx_queued++;
return 0;
}
static void
ural_start(struct ifnet *ifp)
{
struct ural_softc *sc = ifp->if_softc;
struct ieee80211com *ic = &sc->sc_ic;
struct mbuf *m0;
struct ether_header *eh;
struct ieee80211_node *ni;
for (;;) {
IF_POLL(&ic->ic_mgtq, m0);
if (m0 != NULL) {
if (sc->tx_queued >= RAL_TX_LIST_COUNT) {
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
break;
}
IF_DEQUEUE(&ic->ic_mgtq, m0);
ni = (struct ieee80211_node *)m0->m_pkthdr.rcvif;
m0->m_pkthdr.rcvif = NULL;
if (bpf_peers_present(ic->ic_rawbpf))
bpf_mtap(ic->ic_rawbpf, m0);
if (ural_tx_mgt(sc, m0, ni) != 0)
break;
} else {
if (ic->ic_state != IEEE80211_S_RUN)
break;
IFQ_DRV_DEQUEUE(&ifp->if_snd, m0);
if (m0 == NULL)
break;
if (sc->tx_queued >= RAL_TX_LIST_COUNT) {
IFQ_DRV_PREPEND(&ifp->if_snd, m0);
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
break;
}
if (m0->m_len < sizeof (struct ether_header) &&
!(m0 = m_pullup(m0, sizeof (struct ether_header))))
continue;
eh = mtod(m0, struct ether_header *);
ni = ieee80211_find_txnode(ic, eh->ether_dhost);
if (ni == NULL) {
m_freem(m0);
continue;
}
BPF_MTAP(ifp, m0);
m0 = ieee80211_encap(ic, m0, ni);
if (m0 == NULL) {
ieee80211_free_node(ni);
continue;
}
if (bpf_peers_present(ic->ic_rawbpf))
bpf_mtap(ic->ic_rawbpf, m0);
if (ural_tx_data(sc, m0, ni) != 0) {
ieee80211_free_node(ni);
ifp->if_oerrors++;
break;
}
}
sc->sc_tx_timer = 5;
ifp->if_timer = 1;
}
}
static void
ural_watchdog(struct ifnet *ifp)
{
struct ural_softc *sc = ifp->if_softc;
struct ieee80211com *ic = &sc->sc_ic;
RAL_LOCK(sc);
ifp->if_timer = 0;
if (sc->sc_tx_timer > 0) {
if (--sc->sc_tx_timer == 0) {
device_printf(sc->sc_dev, "device timeout\n");
/*ural_init(sc); XXX needs a process context! */
ifp->if_oerrors++;
RAL_UNLOCK(sc);
return;
}
ifp->if_timer = 1;
}
ieee80211_watchdog(ic);
RAL_UNLOCK(sc);
}
/*
* This function allows for fast channel switching in monitor mode (used by
* net-mgmt/kismet). In IBSS mode, we must explicitly reset the interface to
* generate a new beacon frame.
*/
static int
ural_reset(struct ifnet *ifp)
{
struct ural_softc *sc = ifp->if_softc;
struct ieee80211com *ic = &sc->sc_ic;
if (ic->ic_opmode != IEEE80211_M_MONITOR)
return ENETRESET;
ural_set_chan(sc, ic->ic_curchan);
return 0;
}
static 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;
int error = 0;
RAL_LOCK(sc);
switch (cmd) {
case SIOCSIFFLAGS:
if (ifp->if_flags & IFF_UP) {
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
ural_update_promisc(sc);
else
ural_init(sc);
} else {
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
ural_stop(sc);
}
break;
default:
error = ieee80211_ioctl(ic, cmd, data);
}
if (error == ENETRESET) {
if ((ifp->if_flags & IFF_UP) &&
(ifp->if_drv_flags & IFF_DRV_RUNNING) &&
(ic->ic_roaming != IEEE80211_ROAMING_MANUAL))
ural_init(sc);
error = 0;
}
RAL_UNLOCK(sc);
return error;
}
static void
ural_set_testmode(struct ural_softc *sc)
{
usb_device_request_t req;
usbd_status error;
req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
req.bRequest = RAL_VENDOR_REQUEST;
USETW(req.wValue, 4);
USETW(req.wIndex, 1);
USETW(req.wLength, 0);
error = usbd_do_request(sc->sc_udev, &req, NULL);
if (error != 0) {
printf("%s: could not set test mode: %s\n",
device_get_nameunit(sc->sc_dev), usbd_errstr(error));
}
}
static 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",
device_get_nameunit(sc->sc_dev), usbd_errstr(error));
}
}
static 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",
device_get_nameunit(sc->sc_dev), usbd_errstr(error));
return 0;
}
return le16toh(val);
}
static 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",
device_get_nameunit(sc->sc_dev), usbd_errstr(error));
}
}
static 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",
device_get_nameunit(sc->sc_dev), usbd_errstr(error));
}
}
static 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",
device_get_nameunit(sc->sc_dev), usbd_errstr(error));
}
}
static 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", device_get_nameunit(sc->sc_dev));
return;
}
tmp = reg << 8 | val;
ural_write(sc, RAL_PHY_CSR7, tmp);
}
static 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", device_get_nameunit(sc->sc_dev));
return 0;
}
return ural_read(sc, RAL_PHY_CSR7) & 0xff;
}
static 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", device_get_nameunit(sc->sc_dev));
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));
}
static void
ural_set_chan(struct ural_softc *sc, struct ieee80211_channel *c)
{
struct ieee80211com *ic = &sc->sc_ic;
uint8_t power, tmp;
u_int i, chan;
chan = ieee80211_chan2ieee(ic, c);
if (chan == 0 || chan == IEEE80211_CHAN_ANY)
return;
if (IEEE80211_IS_CHAN_2GHZ(c))
power = min(sc->txpow[chan - 1], 31);
else
power = 31;
/* adjust txpower using ifconfig settings */
power -= (100 - ic->ic_txpowlimit) / 8;
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;
/* dual-band RF */
case RAL_RF_5222:
for (i = 0; ural_rf5222[i].chan != chan; i++);
ural_rf_write(sc, RAL_RF1, ural_rf5222[i].r1);
ural_rf_write(sc, RAL_RF2, ural_rf5222[i].r2);
ural_rf_write(sc, RAL_RF3, power << 7 | 0x00040);
ural_rf_write(sc, RAL_RF4, ural_rf5222[i].r4);
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(10000);
ural_disable_rf_tune(sc);
}
}
/*
* Disable RF auto-tuning.
*/
static 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.
*/
static 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"));
}
static void
ural_update_slot(struct ifnet *ifp)
{
struct ural_softc *sc = ifp->if_softc;
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);
}
static 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);
}
static 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 if (IEEE80211_IS_CHAN_5GHZ(ic->ic_bss->ni_chan)) {
/* 11a basic rates: 6, 12, 24Mbps */
ural_write(sc, RAL_TXRX_CSR11, 0x150);
} else {
/* 11g basic rates: 1, 2, 5.5, 11, 6, 12, 24Mbps */
ural_write(sc, RAL_TXRX_CSR11, 0x15f);
}
}
static void
ural_set_bssid(struct ural_softc *sc, 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 %6D\n", bssid, ":"));
}
static void
ural_set_macaddr(struct ural_softc *sc, 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 %6D\n", addr, ":"));
}
static void
ural_update_promisc(struct ural_softc *sc)
{
struct ifnet *ifp = sc->sc_ic.ic_ifp;
uint32_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"));
}
static 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";
}
}
static void
ural_read_eeprom(struct ural_softc *sc)
{
struct ieee80211com *ic = &sc->sc_ic;
uint16_t val;
ural_eeprom_read(sc, RAL_EEPROM_CONFIG0, &val, 2);
val = le16toh(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);
}
static 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) {
device_printf(sc->sc_dev, "timeout waiting for BBP\n");
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
}
static 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 values in PHY_CSR5 and PHY_CSR6 */
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));
}
static 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);
}
static void
ural_init(void *priv)
{
#define N(a) (sizeof (a) / sizeof ((a)[0]))
struct ural_softc *sc = priv;
struct ieee80211com *ic = &sc->sc_ic;
struct ifnet *ifp = ic->ic_ifp;
struct ieee80211_key *wk;
struct ural_rx_data *data;
uint16_t tmp;
usbd_status error;
int i, ntries;
ural_set_testmode(sc);
ural_write(sc, 0x308, 0x00f0); /* XXX magic */
ural_stop(sc);
/* 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",
device_get_nameunit(sc->sc_dev));
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, 0x15f);
if (ural_bbp_init(sc) != 0)
goto fail;
/* set default BSS channel */
ural_set_chan(sc, ic->ic_curchan);
/* clear statistic registers (STA_CSR0 to STA_CSR10) */
ural_read_multi(sc, RAL_STA_CSR0, sc->sta, sizeof sc->sta);
ural_set_txantenna(sc, sc->tx_ant);
ural_set_rxantenna(sc, sc->rx_ant);
IEEE80211_ADDR_COPY(ic->ic_myaddr, IF_LLADDR(ifp));
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++) {
wk = &ic->ic_crypto.cs_nw_keys[i];
ural_write_multi(sc, wk->wk_keyix * IEEE80211_KEYBUF_SIZE +
RAL_SEC_CSR0, wk->wk_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",
device_get_nameunit(sc->sc_dev));
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",
device_get_nameunit(sc->sc_dev), 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",
device_get_nameunit(sc->sc_dev), 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",
device_get_nameunit(sc->sc_dev));
goto fail;
}
error = ural_alloc_rx_list(sc);
if (error != 0) {
printf("%s: could not allocate Rx list\n",
device_get_nameunit(sc->sc_dev));
goto fail;
}
/*
* Start up the receive pipe.
*/
for (i = 0; i < RAL_RX_LIST_COUNT; i++) {
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);
usbd_transfer(data->xfer);
}
/* kick Rx */
tmp = RAL_DROP_PHY | RAL_DROP_CRC;
if (ic->ic_opmode != IEEE80211_M_MONITOR) {
tmp |= RAL_DROP_CTL | RAL_DROP_BAD_VERSION;
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_drv_flags &= ~IFF_DRV_OACTIVE;
ifp->if_drv_flags |= IFF_DRV_RUNNING;
if (ic->ic_opmode != IEEE80211_M_MONITOR) {
if (ic->ic_roaming != IEEE80211_ROAMING_MANUAL)
ieee80211_new_state(ic, IEEE80211_S_SCAN, -1);
} else
ieee80211_new_state(ic, IEEE80211_S_RUN, -1);
return;
fail: ural_stop(sc);
#undef N
}
static void
ural_stop(void *priv)
{
struct ural_softc *sc = priv;
struct ieee80211com *ic = &sc->sc_ic;
struct ifnet *ifp = ic->ic_ifp;
ieee80211_new_state(ic, IEEE80211_S_INIT, -1);
sc->sc_tx_timer = 0;
ifp->if_timer = 0;
ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
/* 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);
}
static int
ural_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
const struct ieee80211_bpf_params *params)
{
struct ieee80211com *ic = ni->ni_ic;
struct ifnet *ifp = ic->ic_ifp;
struct ural_softc *sc = ifp->if_softc;
/* prevent management frames from being sent if we're not ready */
if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
return ENETDOWN;
if (sc->tx_queued >= RAL_TX_LIST_COUNT) {
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
return EIO;
}
if (bpf_peers_present(ic->ic_rawbpf))
bpf_mtap(ic->ic_rawbpf, m);
ifp->if_opackets++;
if (params == NULL) {
/*
* Legacy path; interpret frame contents to decide
* precisely how to send the frame.
*/
if (ural_tx_mgt(sc, m, ni) != 0)
goto bad;
} else {
/*
* Caller supplied explicit parameters to use in
* sending the frame.
*/
if (ural_tx_raw(sc, m, ni, params) != 0)
goto bad;
}
sc->sc_tx_timer = 5;
ifp->if_timer = 1;
return 0;
bad:
ifp->if_oerrors++;
ieee80211_free_node(ni);
return EIO; /* XXX */
}
#define URAL_AMRR_MIN_SUCCESS_THRESHOLD 1
#define URAL_AMRR_MAX_SUCCESS_THRESHOLD 10
static void
ural_amrr_start(struct ural_softc *sc, struct ieee80211_node *ni)
{
struct ural_amrr *amrr = &sc->amrr;
int i;
/* clear statistic registers (STA_CSR0 to STA_CSR10) */
ural_read_multi(sc, RAL_STA_CSR0, sc->sta, sizeof sc->sta);
amrr->success = 0;
amrr->recovery = 0;
amrr->txcnt = amrr->retrycnt = 0;
amrr->success_threshold = URAL_AMRR_MIN_SUCCESS_THRESHOLD;
/* 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;
callout_reset(&sc->amrr_ch, hz, ural_amrr_timeout, sc);
}
static void
ural_amrr_timeout(void *arg)
{
struct ural_softc *sc = (struct ural_softc *)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);
}
static void
ural_amrr_update(usbd_xfer_handle xfer, usbd_private_handle priv,
usbd_status status)
{
struct ural_softc *sc = (struct ural_softc *)priv;
struct ural_amrr *amrr = &sc->amrr;
struct ifnet *ifp = sc->sc_ic.ic_ifp;
if (status != USBD_NORMAL_COMPLETION) {
device_printf(sc->sc_dev, "could not retrieve Tx statistics - "
"cancelling automatic rate control\n");
return;
}
/* count TX retry-fail as Tx errors */
ifp->if_oerrors += sc->sta[9];
amrr->retrycnt =
sc->sta[7] + /* TX one-retry ok count */
sc->sta[8] + /* TX more-retry ok count */
sc->sta[9]; /* TX retry-fail count */
amrr->txcnt =
amrr->retrycnt +
sc->sta[6]; /* TX no-retry ok count */
ural_ratectl(amrr, sc->sc_ic.ic_bss);
callout_reset(&sc->amrr_ch, hz, ural_amrr_timeout, sc);
}
/*-
* Naive implementation of the Adaptive Multi Rate Retry algorithm:
* "IEEE 802.11 Rate Adaptation: A Practical Approach"
* Mathieu Lacage, Hossein Manshaei, Thierry Turletti
* INRIA Sophia - Projet Planete
* http://www-sop.inria.fr/rapports/sophia/RR-5208.html
*
* This algorithm is particularly well suited for ural since it does not
* require per-frame retry statistics. Note however that since h/w does
* not provide per-frame stats, we can't do per-node rate adaptation and
* thus automatic rate adaptation is only enabled in STA operating mode.
*/
#define is_success(amrr) \
((amrr)->retrycnt < (amrr)->txcnt / 10)
#define is_failure(amrr) \
((amrr)->retrycnt > (amrr)->txcnt / 3)
#define is_enough(amrr) \
((amrr)->txcnt > 10)
#define is_min_rate(ni) \
((ni)->ni_txrate == 0)
#define is_max_rate(ni) \
((ni)->ni_txrate == (ni)->ni_rates.rs_nrates - 1)
#define increase_rate(ni) \
((ni)->ni_txrate++)
#define decrease_rate(ni) \
((ni)->ni_txrate--)
#define reset_cnt(amrr) \
do { (amrr)->txcnt = (amrr)->retrycnt = 0; } while (0)
static void
ural_ratectl(struct ural_amrr *amrr, struct ieee80211_node *ni)
{
int need_change = 0;
if (is_success(amrr) && is_enough(amrr)) {
amrr->success++;
if (amrr->success >= amrr->success_threshold &&
!is_max_rate(ni)) {
amrr->recovery = 1;
amrr->success = 0;
increase_rate(ni);
need_change = 1;
} else {
amrr->recovery = 0;
}
} else if (is_failure(amrr)) {
amrr->success = 0;
if (!is_min_rate(ni)) {
if (amrr->recovery) {
amrr->success_threshold *= 2;
if (amrr->success_threshold >
URAL_AMRR_MAX_SUCCESS_THRESHOLD)
amrr->success_threshold =
URAL_AMRR_MAX_SUCCESS_THRESHOLD;
} else {
amrr->success_threshold =
URAL_AMRR_MIN_SUCCESS_THRESHOLD;
}
decrease_rate(ni);
need_change = 1;
}
amrr->recovery = 0; /* original paper was incorrect */
}
if (is_enough(amrr) || need_change)
reset_cnt(amrr);
}
DRIVER_MODULE(ural, uhub, ural_driver, ural_devclass, usbd_driver_load, 0);
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