From: George <george0505@xxxxxxxxxxx>
Add rtlwifi/rtl8192cu/rf.c. This routine is distinct from the one in
rtl8192ce with the same name.
Signed-off-by: George <george0505@xxxxxxxxxxx>
Signed-off-by: Larry Finger <Larry.Finger@xxxxxxxxxxxx>
---
Index: wireless-testing/drivers/net/wireless/rtlwifi/rtl8192cu/rf.c
===================================================================
--- /dev/null
+++ wireless-testing/drivers/net/wireless/rtlwifi/rtl8192cu/rf.c
@@ -0,0 +1,496 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2009-2010 Realtek Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ * Contact Information:
+ * wlanfae <wlanfae@xxxxxxxxxxx>
+ * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
+ * Hsinchu 300, Taiwan.
+ *
+ * Larry Finger <Larry.Finger@xxxxxxxxxxxx>
+ *
+ *****************************************************************************/
+
+#include "../wifi.h"
+#include "reg.h"
+#include "def.h"
+#include "phy.h"
+#include "rf.h"
+#include "dm.h"
+
+static bool _rtl92c_phy_rf6052_config_parafile(struct ieee80211_hw *hw);
+
+void rtl92c_phy_rf6052_set_bandwidth(struct ieee80211_hw *hw, u8 bandwidth)
+{
+ struct rtl_priv *rtlpriv = rtl_priv(hw);
+ struct rtl_phy *rtlphy = &(rtlpriv->phy);
+
+ switch (bandwidth) {
+ case HT_CHANNEL_WIDTH_20:
+ rtlphy->rfreg_chnlval[0] = ((rtlphy->rfreg_chnlval[0] &
+ 0xfffff3ff) | 0x0400);
+ rtl_set_rfreg(hw, RF90_PATH_A, RF_CHNLBW, RFREG_OFFSET_MASK,
+ rtlphy->rfreg_chnlval[0]);
+ break;
+ case HT_CHANNEL_WIDTH_20_40:
+ rtlphy->rfreg_chnlval[0] = ((rtlphy->rfreg_chnlval[0] &
+ 0xfffff3ff));
+ rtl_set_rfreg(hw, RF90_PATH_A, RF_CHNLBW, RFREG_OFFSET_MASK,
+ rtlphy->rfreg_chnlval[0]);
+ break;
+ default:
+ RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
+ ("unknown bandwidth: %#X\n", bandwidth));
+ break;
+ }
+}
+
+void rtl92c_phy_rf6052_set_cck_txpower(struct ieee80211_hw *hw,
+ u8 *ppowerlevel)
+{
+ struct rtl_priv *rtlpriv = rtl_priv(hw);
+ struct rtl_phy *rtlphy = &(rtlpriv->phy);
+ struct rtl_hal *rtlhal = rtl_hal(rtlpriv);
+ struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
+ struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
+ u32 tx_agc[2] = { 0, 0 }, tmpval = 0;
+ bool turbo_scanoff = false;
+ u8 idx1, idx2;
+ u8 *ptr;
+
+ if (rtlhal->interface == INTF_PCI) {
+ if (rtlefuse->eeprom_regulatory != 0)
+ turbo_scanoff = true;
+ } else {
+ if ((rtlefuse->eeprom_regulatory != 0) ||
+ (rtlefuse->external_pa))
+ turbo_scanoff = true;
+ }
+ if (mac->act_scanning == true) {
+ tx_agc[RF90_PATH_A] = 0x3f3f3f3f;
+ tx_agc[RF90_PATH_B] = 0x3f3f3f3f;
+ if (turbo_scanoff) {
+ for (idx1 = RF90_PATH_A; idx1 <= RF90_PATH_B; idx1++) {
+ tx_agc[idx1] = ppowerlevel[idx1] |
+ (ppowerlevel[idx1] << 8) |
+ (ppowerlevel[idx1] << 16) |
+ (ppowerlevel[idx1] << 24);
+ if (rtlhal->interface == INTF_USB) {
+ if (tx_agc[idx1] > 0x20 &&
+ rtlefuse->external_pa)
+ tx_agc[idx1] = 0x20;
+ }
+ }
+ }
+ } else {
+ if (rtlpriv->dm.dynamic_txhighpower_lvl ==
+ TXHIGHPWRLEVEL_LEVEL1) {
+ tx_agc[RF90_PATH_A] = 0x10101010;
+ tx_agc[RF90_PATH_B] = 0x10101010;
+ } else if (rtlpriv->dm.dynamic_txhighpower_lvl ==
+ TXHIGHPWRLEVEL_LEVEL1) {
+ tx_agc[RF90_PATH_A] = 0x00000000;
+ tx_agc[RF90_PATH_B] = 0x00000000;
+ } else{
+ for (idx1 = RF90_PATH_A; idx1 <= RF90_PATH_B; idx1++) {
+ tx_agc[idx1] = ppowerlevel[idx1] |
+ (ppowerlevel[idx1] << 8) |
+ (ppowerlevel[idx1] << 16) |
+ (ppowerlevel[idx1] << 24);
+ }
+ if (rtlefuse->eeprom_regulatory == 0) {
+ tmpval = (rtlphy->mcs_txpwrlevel_origoffset
+ [0][6]) +
+ (rtlphy->mcs_txpwrlevel_origoffset
+ [0][7] << 8);
+ tx_agc[RF90_PATH_A] += tmpval;
+ tmpval = (rtlphy->mcs_txpwrlevel_origoffset
+ [0][14]) +
+ (rtlphy->mcs_txpwrlevel_origoffset
+ [0][15] << 24);
+ tx_agc[RF90_PATH_B] += tmpval;
+ }
+ }
+ }
+ for (idx1 = RF90_PATH_A; idx1 <= RF90_PATH_B; idx1++) {
+ ptr = (u8 *) (&(tx_agc[idx1]));
+ for (idx2 = 0; idx2 < 4; idx2++) {
+ if (*ptr > RF6052_MAX_TX_PWR)
+ *ptr = RF6052_MAX_TX_PWR;
+ ptr++;
+ }
+ }
+ tmpval = tx_agc[RF90_PATH_A] & 0xff;
+ rtl_set_bbreg(hw, RTXAGC_A_CCK1_MCS32, MASKBYTE1, tmpval);
+
+ RTPRINT(rtlpriv, FPHY, PHY_TXPWR,
+ ("CCK PWR 1M (rf-A) = 0x%x (reg 0x%x)\n", tmpval,
+ RTXAGC_A_CCK1_MCS32));
+
+ tmpval = tx_agc[RF90_PATH_A] >> 8;
+ if (mac->mode == WIRELESS_MODE_B)
+ tmpval = tmpval & 0xff00ffff;
+ rtl_set_bbreg(hw, RTXAGC_B_CCK11_A_CCK2_11, 0xffffff00, tmpval);
+ RTPRINT(rtlpriv, FPHY, PHY_TXPWR,
+ ("CCK PWR 2~11M (rf-A) = 0x%x (reg 0x%x)\n", tmpval,
+ RTXAGC_B_CCK11_A_CCK2_11));
+ tmpval = tx_agc[RF90_PATH_B] >> 24;
+ rtl_set_bbreg(hw, RTXAGC_B_CCK11_A_CCK2_11, MASKBYTE0, tmpval);
+ RTPRINT(rtlpriv, FPHY, PHY_TXPWR,
+ ("CCK PWR 11M (rf-B) = 0x%x (reg 0x%x)\n", tmpval,
+ RTXAGC_B_CCK11_A_CCK2_11));
+ tmpval = tx_agc[RF90_PATH_B] & 0x00ffffff;
+ rtl_set_bbreg(hw, RTXAGC_B_CCK1_55_MCS32, 0xffffff00, tmpval);
+ RTPRINT(rtlpriv, FPHY, PHY_TXPWR,
+ ("CCK PWR 1~5.5M (rf-B) = 0x%x (reg 0x%x)\n", tmpval,
+ RTXAGC_B_CCK1_55_MCS32));
+}
+
+static void rtl92c_phy_get_power_base(struct ieee80211_hw *hw,
+ u8 *ppowerlevel, u8 channel,
+ u32 *ofdmbase, u32 *mcsbase)
+{
+ struct rtl_priv *rtlpriv = rtl_priv(hw);
+ struct rtl_phy *rtlphy = &(rtlpriv->phy);
+ struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
+ u32 powerBase0, powerBase1;
+ u8 legacy_pwrdiff = 0, ht20_pwrdiff = 0;
+ u8 i, powerlevel[2];
+
+ for (i = 0; i < 2; i++) {
+ powerlevel[i] = ppowerlevel[i];
+ legacy_pwrdiff = rtlefuse->txpwr_legacyhtdiff[i][channel - 1];
+ powerBase0 = powerlevel[i] + legacy_pwrdiff;
+ powerBase0 = (powerBase0 << 24) | (powerBase0 << 16) |
+ (powerBase0 << 8) | powerBase0;
+ *(ofdmbase + i) = powerBase0;
+ RTPRINT(rtlpriv, FPHY, PHY_TXPWR,
+ (" [OFDM power base index rf(%c) = 0x%x]\n",
+ ((i == 0) ? 'A' : 'B'), *(ofdmbase + i)));
+ }
+ for (i = 0; i < 2; i++) {
+ if (rtlphy->current_chan_bw == HT_CHANNEL_WIDTH_20) {
+ ht20_pwrdiff = rtlefuse->txpwr_ht20diff[i][channel - 1];
+ powerlevel[i] += ht20_pwrdiff;
+ }
+ powerBase1 = powerlevel[i];
+ powerBase1 = (powerBase1 << 24) |
+ (powerBase1 << 16) | (powerBase1 << 8) | powerBase1;
+ *(mcsbase + i) = powerBase1;
+ RTPRINT(rtlpriv, FPHY, PHY_TXPWR,
+ (" [MCS power base index rf(%c) = 0x%x]\n",
+ ((i == 0) ? 'A' : 'B'), *(mcsbase + i)));
+ }
+}
+
+static void _rtl92c_get_txpower_writeval_by_regulatory(struct ieee80211_hw *hw,
+ u8 channel, u8 index,
+ u32 *powerBase0,
+ u32 *powerBase1,
+ u32 *p_outwriteval)
+{
+ struct rtl_priv *rtlpriv = rtl_priv(hw);
+ struct rtl_phy *rtlphy = &(rtlpriv->phy);
+ struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
+ u8 i, chnlgroup = 0, pwr_diff_limit[4];
+ u32 writeVal, customer_limit, rf;
+
+ for (rf = 0; rf < 2; rf++) {
+ switch (rtlefuse->eeprom_regulatory) {
+ case 0:
+ chnlgroup = 0;
+ writeVal = rtlphy->mcs_txpwrlevel_origoffset
+ [chnlgroup][index + (rf ? 8 : 0)]
+ + ((index < 2) ? powerBase0[rf] : powerBase1[rf]);
+ RTPRINT(rtlpriv, FPHY, PHY_TXPWR,
+ ("RTK better performance,writeVal(%c) = 0x%x\n",
+ ((rf == 0) ? 'A' : 'B'), writeVal));
+ break;
+ case 1:
+ if (rtlphy->pwrgroup_cnt == 1)
+ chnlgroup = 0;
+ if (rtlphy->pwrgroup_cnt >= 3) {
+ if (channel <= 3)
+ chnlgroup = 0;
+ else if (channel >= 4 && channel <= 9)
+ chnlgroup = 1;
+ else if (channel > 9)
+ chnlgroup = 2;
+ if (rtlphy->current_chan_bw ==
+ HT_CHANNEL_WIDTH_20)
+ chnlgroup++;
+ else
+ chnlgroup += 4;
+ }
+ writeVal = rtlphy->mcs_txpwrlevel_origoffset
+ [chnlgroup][index +
+ (rf ? 8 : 0)] +
+ ((index < 2) ? powerBase0[rf] :
+ powerBase1[rf]);
+ RTPRINT(rtlpriv, FPHY, PHY_TXPWR,
+ ("Realtek regulatory, 20MHz, "
+ "writeVal(%c) = 0x%x\n",
+ ((rf == 0) ? 'A' : 'B'), writeVal));
+ break;
+ case 2:
+ writeVal = ((index < 2) ? powerBase0[rf] :
+ powerBase1[rf]);
+ RTPRINT(rtlpriv, FPHY, PHY_TXPWR,
+ ("Better regulatory,writeVal(%c) = 0x%x\n",
+ ((rf == 0) ? 'A' : 'B'), writeVal));
+ break;
+ case 3:
+ chnlgroup = 0;
+ if (rtlphy->current_chan_bw ==
+ HT_CHANNEL_WIDTH_20_40) {
+ RTPRINT(rtlpriv, FPHY, PHY_TXPWR,
+ ("customer's limit, 40MHzrf(%c) = "
+ "0x%x\n", ((rf == 0) ? 'A' : 'B'),
+ rtlefuse->pwrgroup_ht40[rf]
+ [channel - 1]));
+ } else {
+ RTPRINT(rtlpriv, FPHY, PHY_TXPWR,
+ ("customer's limit, 20MHz rf(%c) = "
+ "0x%x\n", ((rf == 0) ? 'A' : 'B'),
+ rtlefuse->pwrgroup_ht20[rf]
+ [channel - 1]));
+ }
+ for (i = 0; i < 4; i++) {
+ pwr_diff_limit[i] =
+ (u8) ((rtlphy->mcs_txpwrlevel_origoffset
+ [chnlgroup][index + (rf ? 8 : 0)]
+ & (0x7f << (i * 8))) >> (i * 8));
+ if (rtlphy->current_chan_bw ==
+ HT_CHANNEL_WIDTH_20_40) {
+ if (pwr_diff_limit[i] >
+ rtlefuse->pwrgroup_ht40[rf]
+ [channel - 1])
+ pwr_diff_limit[i] = rtlefuse->
+ pwrgroup_ht40[rf]
+ [channel - 1];
+ } else {
+ if (pwr_diff_limit[i] >
+ rtlefuse->pwrgroup_ht20[rf]
+ [channel - 1])
+ pwr_diff_limit[i] =
+ rtlefuse->pwrgroup_ht20[rf]
+ [channel - 1];
+ }
+ }
+ customer_limit = (pwr_diff_limit[3] << 24) |
+ (pwr_diff_limit[2] << 16) |
+ (pwr_diff_limit[1] << 8) | (pwr_diff_limit[0]);
+ RTPRINT(rtlpriv, FPHY, PHY_TXPWR,
+ ("Customer's limit rf(%c) = 0x%x\n",
+ ((rf == 0) ? 'A' : 'B'), customer_limit));
+ writeVal = customer_limit + ((index < 2) ?
+ powerBase0[rf] : powerBase1[rf]);
+ RTPRINT(rtlpriv, FPHY, PHY_TXPWR,
+ ("Customer, writeVal rf(%c)= 0x%x\n",
+ ((rf == 0) ? 'A' : 'B'), writeVal));
+ break;
+ default:
+ chnlgroup = 0;
+ writeVal = rtlphy->mcs_txpwrlevel_origoffset[chnlgroup]
+ [index + (rf ? 8 : 0)] + ((index < 2) ?
+ powerBase0[rf] : powerBase1[rf]);
+ RTPRINT(rtlpriv, FPHY, PHY_TXPWR, ("RTK better "
+ "performance, writeValrf(%c) = 0x%x\n",
+ ((rf == 0) ? 'A' : 'B'), writeVal));
+ break;
+ }
+ if (rtlpriv->dm.dynamic_txhighpower_lvl ==
+ TXHIGHPWRLEVEL_LEVEL1)
+ writeVal = 0x14141414;
+ else if (rtlpriv->dm.dynamic_txhighpower_lvl ==
+ TXHIGHPWRLEVEL_LEVEL2)
+ writeVal = 0x00000000;
+ if (rtlpriv->dm.dynamic_txhighpower_lvl == TXHIGHPWRLEVEL_BT1)
+ writeVal = writeVal - 0x06060606;
+ else if (rtlpriv->dm.dynamic_txhighpower_lvl ==
+ TXHIGHPWRLEVEL_BT2)
+ writeVal = writeVal;
+ *(p_outwriteval + rf) = writeVal;
+ }
+}
+
+static void _rtl92c_write_ofdm_power_reg(struct ieee80211_hw *hw,
+ u8 index, u32 *pValue)
+{
+ struct rtl_priv *rtlpriv = rtl_priv(hw);
+ struct rtl_phy *rtlphy = &(rtlpriv->phy);
+ u16 regoffset_a[6] = {
+ RTXAGC_A_RATE18_06, RTXAGC_A_RATE54_24,
+ RTXAGC_A_MCS03_MCS00, RTXAGC_A_MCS07_MCS04,
+ RTXAGC_A_MCS11_MCS08, RTXAGC_A_MCS15_MCS12
+ };
+ u16 regoffset_b[6] = {
+ RTXAGC_B_RATE18_06, RTXAGC_B_RATE54_24,
+ RTXAGC_B_MCS03_MCS00, RTXAGC_B_MCS07_MCS04,
+ RTXAGC_B_MCS11_MCS08, RTXAGC_B_MCS15_MCS12
+ };
+ u8 i, rf, pwr_val[4];
+ u32 writeVal;
+ u16 regoffset;
+
+ for (rf = 0; rf < 2; rf++) {
+ writeVal = pValue[rf];
+ for (i = 0; i < 4; i++) {
+ pwr_val[i] = (u8)((writeVal & (0x7f << (i * 8))) >>
+ (i * 8));
+ if (pwr_val[i] > RF6052_MAX_TX_PWR)
+ pwr_val[i] = RF6052_MAX_TX_PWR;
+ }
+ writeVal = (pwr_val[3] << 24) | (pwr_val[2] << 16) |
+ (pwr_val[1] << 8) | pwr_val[0];
+ if (rf == 0)
+ regoffset = regoffset_a[index];
+ else
+ regoffset = regoffset_b[index];
+ rtl_set_bbreg(hw, regoffset, MASKDWORD, writeVal);
+ RTPRINT(rtlpriv, FPHY, PHY_TXPWR,
+ ("Set 0x%x = %08x\n", regoffset, writeVal));
+ if (((get_rf_type(rtlphy) == RF_2T2R) &&
+ (regoffset == RTXAGC_A_MCS15_MCS12 ||
+ regoffset == RTXAGC_B_MCS15_MCS12)) ||
+ ((get_rf_type(rtlphy) != RF_2T2R) &&
+ (regoffset == RTXAGC_A_MCS07_MCS04 ||
+ regoffset == RTXAGC_B_MCS07_MCS04))) {
+ writeVal = pwr_val[3];
+ if (regoffset == RTXAGC_A_MCS15_MCS12 ||
+ regoffset == RTXAGC_A_MCS07_MCS04)
+ regoffset = 0xc90;
+ if (regoffset == RTXAGC_B_MCS15_MCS12 ||
+ regoffset == RTXAGC_B_MCS07_MCS04)
+ regoffset = 0xc98;
+ for (i = 0; i < 3; i++) {
+ writeVal = (writeVal > 6) ? (writeVal - 6) : 0;
+ rtl_write_byte(rtlpriv, (u32)(regoffset + i),
+ (u8)writeVal);
+ }
+ }
+ }
+}
+
+void rtl92c_phy_rf6052_set_ofdm_txpower(struct ieee80211_hw *hw,
+ u8 *ppowerlevel, u8 channel)
+{
+ u32 writeVal[2], powerBase0[2], powerBase1[2];
+ u8 index = 0;
+
+ rtl92c_phy_get_power_base(hw, ppowerlevel,
+ channel, &powerBase0[0], &powerBase1[0]);
+ for (index = 0; index < 6; index++) {
+ _rtl92c_get_txpower_writeval_by_regulatory(hw,
+ channel, index,
+ &powerBase0[0],
+ &powerBase1[0],
+ &writeVal[0]);
+ _rtl92c_write_ofdm_power_reg(hw, index, &writeVal[0]);
+ }
+}
+
+bool rtl92c_phy_rf6052_config(struct ieee80211_hw *hw)
+{
+ struct rtl_priv *rtlpriv = rtl_priv(hw);
+ struct rtl_phy *rtlphy = &(rtlpriv->phy);
+ bool rtstatus = true;
+ u8 b_reg_hwparafile = 1;
+
+ if (rtlphy->rf_type == RF_1T1R)
+ rtlphy->num_total_rfpath = 1;
+ else
+ rtlphy->num_total_rfpath = 2;
+ if (b_reg_hwparafile == 1)
+ rtstatus = _rtl92c_phy_rf6052_config_parafile(hw);
+ return rtstatus;
+}
+
+static bool _rtl92c_phy_rf6052_config_parafile(struct ieee80211_hw *hw)
+{
+ struct rtl_priv *rtlpriv = rtl_priv(hw);
+ struct rtl_phy *rtlphy = &(rtlpriv->phy);
+ u32 u4_regvalue = 0;
+ u8 rfpath;
+ bool rtstatus = true;
+ struct bb_reg_def *pphyreg;
+
+ for (rfpath = 0; rfpath < rtlphy->num_total_rfpath; rfpath++) {
+ pphyreg = &rtlphy->phyreg_def[rfpath];
+ switch (rfpath) {
+ case RF90_PATH_A:
+ case RF90_PATH_C:
+ u4_regvalue = rtl_get_bbreg(hw, pphyreg->rfintfs,
+ BRFSI_RFENV);
+ break;
+ case RF90_PATH_B:
+ case RF90_PATH_D:
+ u4_regvalue = rtl_get_bbreg(hw, pphyreg->rfintfs,
+ BRFSI_RFENV << 16);
+ break;
+ }
+ rtl_set_bbreg(hw, pphyreg->rfintfe, BRFSI_RFENV << 16, 0x1);
+ udelay(1);
+ rtl_set_bbreg(hw, pphyreg->rfintfo, BRFSI_RFENV, 0x1);
+ udelay(1);
+ rtl_set_bbreg(hw, pphyreg->rfhssi_para2,
+ B3WIREADDREAALENGTH, 0x0);
+ udelay(1);
+ rtl_set_bbreg(hw, pphyreg->rfhssi_para2, B3WIREDATALENGTH, 0x0);
+ udelay(1);
+ switch (rfpath) {
+ case RF90_PATH_A:
+ rtstatus = rtl92c_phy_config_rf_with_headerfile(hw,
+ (enum radio_path) rfpath);
+ break;
+ case RF90_PATH_B:
+ rtstatus = rtl92c_phy_config_rf_with_headerfile(hw,
+ (enum radio_path) rfpath);
+ break;
+ case RF90_PATH_C:
+ break;
+ case RF90_PATH_D:
+ break;
+ }
+ switch (rfpath) {
+ case RF90_PATH_A:
+ case RF90_PATH_C:
+ rtl_set_bbreg(hw, pphyreg->rfintfs,
+ BRFSI_RFENV, u4_regvalue);
+ break;
+ case RF90_PATH_B:
+ case RF90_PATH_D:
+ rtl_set_bbreg(hw, pphyreg->rfintfs,
+ BRFSI_RFENV << 16, u4_regvalue);
+ break;
+ }
+ if (rtstatus != true) {
+ RT_TRACE(rtlpriv, COMP_INIT, DBG_TRACE,
+ ("Radio[%d] Fail!!", rfpath));
+ goto phy_rf_cfg_fail;
+ }
+ }
+ RT_TRACE(rtlpriv, COMP_INIT, DBG_TRACE, ("<---\n"));
+ return rtstatus;
+phy_rf_cfg_fail:
+ return rtstatus;
+}
+
+
+
--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
