diff options
Diffstat (limited to 'drivers/net/wireless/b43/phy_g.c')
| -rw-r--r-- | drivers/net/wireless/b43/phy_g.c | 218 |
1 files changed, 120 insertions, 98 deletions
diff --git a/drivers/net/wireless/b43/phy_g.c b/drivers/net/wireless/b43/phy_g.c index bb95c54cd43..fce84896d34 100644 --- a/drivers/net/wireless/b43/phy_g.c +++ b/drivers/net/wireless/b43/phy_g.c @@ -2659,6 +2659,7 @@ static int b43_gphy_op_allocate(struct b43_wldev *dev) /* OFDM-table address caching. */ gphy->ofdmtab_addr_direction = B43_OFDMTAB_DIRECTION_UNKNOWN; + gphy->average_tssi = 0xFF; lo = kzalloc(sizeof(*lo), GFP_KERNEL); if (!lo) { @@ -3011,113 +3012,20 @@ static void b43_put_attenuation_into_ranges(struct b43_wldev *dev, *_bbatt = clamp_val(bbatt, bb_min, bb_max); } -static void b43_gphy_op_xmitpower(struct b43_wldev *dev) +static void b43_gphy_op_adjust_txpower(struct b43_wldev *dev) { - struct ssb_bus *bus = dev->dev->bus; struct b43_phy *phy = &dev->phy; struct b43_phy_g *gphy = phy->g; - u16 tmp; - s8 v0, v1, v2, v3; - s8 average; - int max_pwr; - int desired_pwr, estimated_pwr, pwr_adjust; - int rfatt_delta, bbatt_delta; int rfatt, bbatt; u8 tx_control; - if (gphy->cur_idle_tssi == 0) - return; - if ((bus->boardinfo.vendor == SSB_BOARDVENDOR_BCM) && - (bus->boardinfo.type == SSB_BOARD_BU4306)) - return; - - tmp = b43_shm_read16(dev, B43_SHM_SHARED, 0x0058); - v0 = (s8) (tmp & 0x00FF); - v1 = (s8) ((tmp & 0xFF00) >> 8); - tmp = b43_shm_read16(dev, B43_SHM_SHARED, 0x005A); - v2 = (s8) (tmp & 0x00FF); - v3 = (s8) ((tmp & 0xFF00) >> 8); - tmp = 0; - - if (v0 == 0x7F || v1 == 0x7F || v2 == 0x7F - || v3 == 0x7F) { - tmp = b43_shm_read16(dev, B43_SHM_SHARED, 0x0070); - v0 = (s8) (tmp & 0x00FF); - v1 = (s8) ((tmp & 0xFF00) >> 8); - tmp = b43_shm_read16(dev, B43_SHM_SHARED, 0x0072); - v2 = (s8) (tmp & 0x00FF); - v3 = (s8) ((tmp & 0xFF00) >> 8); - if (v0 == 0x7F || v1 == 0x7F || v2 == 0x7F - || v3 == 0x7F) - return; - v0 = (v0 + 0x20) & 0x3F; - v1 = (v1 + 0x20) & 0x3F; - v2 = (v2 + 0x20) & 0x3F; - v3 = (v3 + 0x20) & 0x3F; - tmp = 1; - } - b43_shm_clear_tssi(dev); - - average = (v0 + v1 + v2 + v3 + 2) / 4; - - if (tmp && (b43_shm_read16(dev, B43_SHM_SHARED, 0x005E) & 0x8)) - average -= 13; - - estimated_pwr = b43_gphy_estimate_power_out(dev, average); - - max_pwr = dev->dev->bus->sprom.maxpwr_bg; - if ((dev->dev->bus->sprom.boardflags_lo - & B43_BFL_PACTRL) && (phy->type == B43_PHYTYPE_G)) - max_pwr -= 0x3; - if (unlikely(max_pwr <= 0)) { - b43warn(dev->wl, - "Invalid max-TX-power value in SPROM.\n"); - max_pwr = 60; /* fake it */ - dev->dev->bus->sprom.maxpwr_bg = max_pwr; - } - - /*TODO: - max_pwr = min(REG - dev->dev->bus->sprom.antennagain_bgphy - 0x6, max_pwr) - where REG is the max power as per the regulatory domain - */ - - /* Get desired power (in Q5.2) */ - desired_pwr = INT_TO_Q52(phy->power_level); - /* And limit it. max_pwr already is Q5.2 */ - desired_pwr = clamp_val(desired_pwr, 0, max_pwr); - if (b43_debug(dev, B43_DBG_XMITPOWER)) { - b43dbg(dev->wl, - "Current TX power output: " Q52_FMT - " dBm, " "Desired TX power output: " - Q52_FMT " dBm\n", Q52_ARG(estimated_pwr), - Q52_ARG(desired_pwr)); - } - - /* Calculate the adjustment delta. */ - pwr_adjust = desired_pwr - estimated_pwr; - - /* RF attenuation delta. */ - rfatt_delta = ((pwr_adjust + 7) / 8); - /* Lower attenuation => Bigger power output. Negate it. */ - rfatt_delta = -rfatt_delta; - - /* Baseband attenuation delta. */ - bbatt_delta = pwr_adjust / 2; - /* Lower attenuation => Bigger power output. Negate it. */ - bbatt_delta = -bbatt_delta; - /* RF att affects power level 4 times as much as - * Baseband attennuation. Subtract it. */ - bbatt_delta -= 4 * rfatt_delta; - - /* So do we finally need to adjust something? */ - if ((rfatt_delta == 0) && (bbatt_delta == 0)) - return; + spin_lock_irq(&dev->wl->irq_lock); /* Calculate the new attenuation values. */ bbatt = gphy->bbatt.att; - bbatt += bbatt_delta; + bbatt += gphy->bbatt_delta; rfatt = gphy->rfatt.att; - rfatt += rfatt_delta; + rfatt += gphy->rfatt_delta; b43_put_attenuation_into_ranges(dev, &bbatt, &rfatt); tx_control = gphy->tx_control; @@ -3152,6 +3060,14 @@ static void b43_gphy_op_xmitpower(struct b43_wldev *dev) gphy->rfatt.att = rfatt; gphy->bbatt.att = bbatt; + /* We drop the lock early, so we can sleep during hardware + * adjustment. Possible races with op_recalc_txpower are harmless, + * as we will be called once again in case we raced. */ + spin_unlock_irq(&dev->wl->irq_lock); + + if (b43_debug(dev, B43_DBG_XMITPOWER)) + b43dbg(dev->wl, "Adjusting TX power\n"); + /* Adjust the hardware */ b43_phy_lock(dev); b43_radio_lock(dev); @@ -3161,6 +3077,111 @@ static void b43_gphy_op_xmitpower(struct b43_wldev *dev) b43_phy_unlock(dev); } +static enum b43_txpwr_result b43_gphy_op_recalc_txpower(struct b43_wldev *dev, + bool ignore_tssi) +{ + struct b43_phy *phy = &dev->phy; + struct b43_phy_g *gphy = phy->g; + unsigned int average_tssi; + int cck_result, ofdm_result; + int estimated_pwr, desired_pwr, pwr_adjust; + int rfatt_delta, bbatt_delta; + unsigned int max_pwr; + + /* First get the average TSSI */ + cck_result = b43_phy_shm_tssi_read(dev, B43_SHM_SH_TSSI_CCK); + ofdm_result = b43_phy_shm_tssi_read(dev, B43_SHM_SH_TSSI_OFDM_G); + if ((cck_result < 0) && (ofdm_result < 0)) { + /* No TSSI information available */ + if (!ignore_tssi) + goto no_adjustment_needed; + cck_result = 0; + ofdm_result = 0; + } + if (cck_result < 0) + average_tssi = ofdm_result; + else if (ofdm_result < 0) + average_tssi = cck_result; + else + average_tssi = (cck_result + ofdm_result) / 2; + /* Merge the average with the stored value. */ + if (likely(gphy->average_tssi != 0xFF)) + average_tssi = (average_tssi + gphy->average_tssi) / 2; + gphy->average_tssi = average_tssi; + B43_WARN_ON(average_tssi >= B43_TSSI_MAX); + + /* Estimate the TX power emission based on the TSSI */ + estimated_pwr = b43_gphy_estimate_power_out(dev, average_tssi); + + B43_WARN_ON(phy->type != B43_PHYTYPE_G); + max_pwr = dev->dev->bus->sprom.maxpwr_bg; + if (dev->dev->bus->sprom.boardflags_lo & B43_BFL_PACTRL) + max_pwr -= 3; /* minus 0.75 */ + if (unlikely(max_pwr >= INT_TO_Q52(30/*dBm*/))) { + b43warn(dev->wl, + "Invalid max-TX-power value in SPROM.\n"); + max_pwr = INT_TO_Q52(20); /* fake it */ + dev->dev->bus->sprom.maxpwr_bg = max_pwr; + } + + /* Get desired power (in Q5.2) */ + if (phy->desired_txpower < 0) + desired_pwr = INT_TO_Q52(0); + else + desired_pwr = INT_TO_Q52(phy->desired_txpower); + /* And limit it. max_pwr already is Q5.2 */ + desired_pwr = clamp_val(desired_pwr, 0, max_pwr); + if (b43_debug(dev, B43_DBG_XMITPOWER)) { + b43dbg(dev->wl, + "[TX power] current = " Q52_FMT + " dBm, desired = " Q52_FMT + " dBm, max = " Q52_FMT "\n", + Q52_ARG(estimated_pwr), + Q52_ARG(desired_pwr), + Q52_ARG(max_pwr)); + } + + /* Calculate the adjustment delta. */ + pwr_adjust = desired_pwr - estimated_pwr; + if (pwr_adjust == 0) + goto no_adjustment_needed; + + /* RF attenuation delta. */ + rfatt_delta = ((pwr_adjust + 7) / 8); + /* Lower attenuation => Bigger power output. Negate it. */ + rfatt_delta = -rfatt_delta; + + /* Baseband attenuation delta. */ + bbatt_delta = pwr_adjust / 2; + /* Lower attenuation => Bigger power output. Negate it. */ + bbatt_delta = -bbatt_delta; + /* RF att affects power level 4 times as much as + * Baseband attennuation. Subtract it. */ + bbatt_delta -= 4 * rfatt_delta; + + if (b43_debug(dev, B43_DBG_XMITPOWER)) { + int dbm = pwr_adjust < 0 ? -pwr_adjust : pwr_adjust; + b43dbg(dev->wl, + "[TX power deltas] %s" Q52_FMT " dBm => " + "bbatt-delta = %d, rfatt-delta = %d\n", + (pwr_adjust < 0 ? "-" : ""), Q52_ARG(dbm), + bbatt_delta, rfatt_delta); + } + /* So do we finally need to adjust something in hardware? */ + if ((rfatt_delta == 0) && (bbatt_delta == 0)) + goto no_adjustment_needed; + + /* Save the deltas for later when we adjust the power. */ + gphy->bbatt_delta = bbatt_delta; + gphy->rfatt_delta = rfatt_delta; + + /* We need to adjust the TX power on the device. */ + return B43_TXPWR_RES_NEED_ADJUST; + +no_adjustment_needed: + return B43_TXPWR_RES_DONE; +} + static void b43_gphy_op_pwork_15sec(struct b43_wldev *dev) { struct b43_phy *phy = &dev->phy; @@ -3223,7 +3244,8 @@ const struct b43_phy_operations b43_phyops_g = { .get_default_chan = b43_gphy_op_get_default_chan, .set_rx_antenna = b43_gphy_op_set_rx_antenna, .interf_mitigation = b43_gphy_op_interf_mitigation, - .xmitpower = b43_gphy_op_xmitpower, + .recalc_txpower = b43_gphy_op_recalc_txpower, + .adjust_txpower = b43_gphy_op_adjust_txpower, .pwork_15sec = b43_gphy_op_pwork_15sec, .pwork_60sec = b43_gphy_op_pwork_60sec, }; |