/* * Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org> * Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com> * Copyright (c) 2007-2008 Luis Rodriguez <mcgrof@winlab.rutgers.edu> * Copyright (c) 2007-2008 Pavel Roskin <proski@gnu.org> * Copyright (c) 2007-2008 Jiri Slaby <jirislaby@gmail.com> * * 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. *
*/
/****************************\ Reset function and helpers
\****************************/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/unaligned.h>
#include <linux/pci.h> /* To determine if a card is pci-e */ #include <linux/log2.h> #include <linux/platform_device.h> #include"ath5k.h" #include"reg.h" #include"debug.h"
/** * DOC: Reset function and helpers * * Here we implement the main reset routine, used to bring the card * to a working state and ready to receive. We also handle routines * that don't fit on other places such as clock, sleep and power control
*/
/** * ath5k_hw_register_timeout() - Poll a register for a flag/field change * @ah: The &struct ath5k_hw * @reg: The register to read * @flag: The flag/field to check on the register * @val: The field value we expect (if we check a field) * @is_set: Instead of checking if the flag got cleared, check if it got set * * Some registers contain flags that indicate that an operation is * running. We use this function to poll these registers and check * if these flags get cleared. We also use it to poll a register * field (containing multiple flags) until it gets a specific value. * * Returns -EAGAIN if we exceeded AR5K_TUNE_REGISTER_TIMEOUT * 15us or 0
*/ int
ath5k_hw_register_timeout(struct ath5k_hw *ah, u32 reg, u32 flag, u32 val, bool is_set)
{ int i;
u32 data;
for (i = AR5K_TUNE_REGISTER_TIMEOUT; i > 0; i--) {
data = ath5k_hw_reg_read(ah, reg); if (is_set && (data & flag)) break; elseif ((data & flag) == val) break;
udelay(15);
}
return (i <= 0) ? -EAGAIN : 0;
}
/*************************\ * Clock related functions *
\*************************/
/** * ath5k_hw_htoclock() - Translate usec to hw clock units * @ah: The &struct ath5k_hw * @usec: value in microseconds * * Translate usecs to hw clock units based on the current * hw clock rate. * * Returns number of clock units
*/ unsignedint
ath5k_hw_htoclock(struct ath5k_hw *ah, unsignedint usec)
{ struct ath_common *common = ath5k_hw_common(ah); return usec * common->clockrate;
}
/** * ath5k_hw_clocktoh() - Translate hw clock units to usec * @ah: The &struct ath5k_hw * @clock: value in hw clock units * * Translate hw clock units to usecs based on the current * hw clock rate. * * Returns number of usecs
*/ unsignedint
ath5k_hw_clocktoh(struct ath5k_hw *ah, unsignedint clock)
{ struct ath_common *common = ath5k_hw_common(ah); return clock / common->clockrate;
}
/* * Set core clock frequency
*/ switch (channel->hw_value) { case AR5K_MODE_11A:
clock = 40; break; case AR5K_MODE_11B:
clock = 22; break; case AR5K_MODE_11G: default:
clock = 44; break;
}
/* Use clock multiplier for non-default
* bwmode */ switch (ah->ah_bwmode) { case AR5K_BWMODE_40MHZ:
clock *= 2; break; case AR5K_BWMODE_10MHZ:
clock /= 2; break; case AR5K_BWMODE_5MHZ:
clock /= 4; break; default: break;
}
common->clockrate = clock;
/* * Set USEC parameters
*/ /* Set USEC counter on PCU*/
usec = clock - 1;
usec = AR5K_REG_SM(usec, AR5K_USEC_1);
/* Set usec duration on DCU */ if (ah->ah_version != AR5K_AR5210)
AR5K_REG_WRITE_BITS(ah, AR5K_DCU_GBL_IFS_MISC,
AR5K_DCU_GBL_IFS_MISC_USEC_DUR,
clock);
/* * Set default Tx frame to Tx data start delay
*/
txf2txs = AR5K_INIT_TXF2TXD_START_DEFAULT;
/* * 5210 initvals don't include usec settings * so we need to use magic values here for * tx/rx latencies
*/ if (ah->ah_version == AR5K_AR5210) { /* same for turbo */
txlat = AR5K_INIT_TX_LATENCY_5210;
rxlat = AR5K_INIT_RX_LATENCY_5210;
}
if (ah->ah_mac_srev < AR5K_SREV_AR5211) { /* 5311 has different tx/rx latency masks * from 5211, since we deal 5311 the same * as 5211 when setting initvals, shift * values here to their proper locations * * Note: Initvals indicate tx/rx/ latencies
* are the same for turbo mode */
txlat = AR5K_REG_SM(txlat, AR5K_USEC_TX_LATENCY_5210);
rxlat = AR5K_REG_SM(rxlat, AR5K_USEC_RX_LATENCY_5210);
} else switch (ah->ah_bwmode) { case AR5K_BWMODE_10MHZ:
txlat = AR5K_REG_SM(txlat * 2,
AR5K_USEC_TX_LATENCY_5211);
rxlat = AR5K_REG_SM(AR5K_INIT_RX_LAT_MAX,
AR5K_USEC_RX_LATENCY_5211);
txf2txs = AR5K_INIT_TXF2TXD_START_DELAY_10MHZ; break; case AR5K_BWMODE_5MHZ:
txlat = AR5K_REG_SM(txlat * 4,
AR5K_USEC_TX_LATENCY_5211);
rxlat = AR5K_REG_SM(AR5K_INIT_RX_LAT_MAX,
AR5K_USEC_RX_LATENCY_5211);
txf2txs = AR5K_INIT_TXF2TXD_START_DELAY_5MHZ; break; case AR5K_BWMODE_40MHZ:
txlat = AR5K_INIT_TX_LAT_MIN;
rxlat = AR5K_REG_SM(rxlat / 2,
AR5K_USEC_RX_LATENCY_5211);
txf2txs = AR5K_INIT_TXF2TXD_START_DEFAULT; break; default: break;
}
/* On 5112 set tx frame to tx data start delay */ if (ah->ah_radio == AR5K_RF5112) {
AR5K_REG_WRITE_BITS(ah, AR5K_PHY_RF_CTL2,
AR5K_PHY_RF_CTL2_TXF2TXD_START,
txf2txs);
}
}
/** * ath5k_hw_set_sleep_clock() - Setup sleep clock operation * @ah: The &struct ath5k_hw * @enable: Enable sleep clock operation (false to disable) * * If there is an external 32KHz crystal available, use it * as ref. clock instead of 32/40MHz clock and baseband clocks * to save power during sleep or restore normal 32/40MHz * operation. * * NOTE: When operating on 32KHz certain PHY registers (27 - 31, * 123 - 127) require delay on access.
*/ staticvoid
ath5k_hw_set_sleep_clock(struct ath5k_hw *ah, bool enable)
{ struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
u32 scal, spending, sclock;
/* Only set 32KHz settings if we have an external
* 32KHz crystal present */ if ((AR5K_EEPROM_HAS32KHZCRYSTAL(ee->ee_misc1) ||
AR5K_EEPROM_HAS32KHZCRYSTAL_OLD(ee->ee_misc1)) &&
enable) {
/* 1 usec/cycle */
AR5K_REG_WRITE_BITS(ah, AR5K_USEC_5211, AR5K_USEC_32, 1); /* Set up tsf increment on each cycle */
AR5K_REG_WRITE_BITS(ah, AR5K_TSF_PARM, AR5K_TSF_PARM_INC, 61);
/* Set baseband sleep control registers
* and sleep control rate */
ath5k_hw_reg_write(ah, 0x1f, AR5K_PHY_SCR);
/*********************\ * Reset/Sleep control *
\*********************/
/** * ath5k_hw_nic_reset() - Reset the various chipset units * @ah: The &struct ath5k_hw * @val: Mask to indicate what units to reset * * To reset the various chipset units we need to write * the mask to AR5K_RESET_CTL and poll the register until * all flags are cleared. * * Returns 0 if we are O.K. or -EAGAIN (from athk5_hw_register_timeout)
*/ staticint
ath5k_hw_nic_reset(struct ath5k_hw *ah, u32 val)
{ int ret;
u32 mask = val ? val : ~0U;
ret = ath5k_hw_register_timeout(ah, AR5K_RESET_CTL, mask, val, false);
/* * Reset configuration register (for hw byte-swap). Note that this * is only set for big endian. We do the necessary magic in * AR5K_INIT_CFG.
*/ if ((val & AR5K_RESET_CTL_PCU) == 0)
ath5k_hw_reg_write(ah, AR5K_INIT_CFG, AR5K_CFG);
return ret;
}
/** * ath5k_hw_wisoc_reset() - Reset AHB chipset * @ah: The &struct ath5k_hw * @flags: Mask to indicate what units to reset * * Same as ath5k_hw_nic_reset but for AHB based devices * * Returns 0 if we are O.K. or -EAGAIN (from athk5_hw_register_timeout)
*/ staticint
ath5k_hw_wisoc_reset(struct ath5k_hw *ah, u32 flags)
{
u32 mask = flags ? flags : ~0U;
u32 __iomem *reg;
u32 regval;
u32 val = 0;
/* ah->ah_mac_srev is not available at this point yet */ if (ah->devid >= AR5K_SREV_AR2315_R6) {
reg = (u32 __iomem *) AR5K_AR2315_RESET; if (mask & AR5K_RESET_CTL_PCU)
val |= AR5K_AR2315_RESET_WMAC; if (mask & AR5K_RESET_CTL_BASEBAND)
val |= AR5K_AR2315_RESET_BB_WARM;
} else {
reg = (u32 __iomem *) AR5K_AR5312_RESET; if (to_platform_device(ah->dev)->id == 0) { if (mask & AR5K_RESET_CTL_PCU)
val |= AR5K_AR5312_RESET_WMAC0; if (mask & AR5K_RESET_CTL_BASEBAND)
val |= AR5K_AR5312_RESET_BB0_COLD |
AR5K_AR5312_RESET_BB0_WARM;
} else { if (mask & AR5K_RESET_CTL_PCU)
val |= AR5K_AR5312_RESET_WMAC1; if (mask & AR5K_RESET_CTL_BASEBAND)
val |= AR5K_AR5312_RESET_BB1_COLD |
AR5K_AR5312_RESET_BB1_WARM;
}
}
/* Put BB/MAC into reset */
regval = ioread32(reg);
iowrite32(regval | val, reg);
regval = ioread32(reg);
udelay(100); /* NB: should be atomic */
/* Bring BB/MAC out of reset */
iowrite32(regval & ~val, reg);
regval = ioread32(reg);
/* * Reset configuration register (for hw byte-swap). Note that this * is only set for big endian. We do the necessary magic in * AR5K_INIT_CFG.
*/ if ((flags & AR5K_RESET_CTL_PCU) == 0)
ath5k_hw_reg_write(ah, AR5K_INIT_CFG, AR5K_CFG);
return 0;
}
/** * ath5k_hw_set_power_mode() - Set power mode * @ah: The &struct ath5k_hw * @mode: One of enum ath5k_power_mode * @set_chip: Set to true to write sleep control register * @sleep_duration: How much time the device is allowed to sleep * when sleep logic is enabled (in 128 microsecond increments). * * This function is used to configure sleep policy and allowed * sleep modes. For more information check out the sleep control * register on reg.h and STA_ID1. * * Returns 0 on success, -EIO if chip didn't wake up or -EINVAL if an invalid * mode is requested.
*/ staticint
ath5k_hw_set_power_mode(struct ath5k_hw *ah, enum ath5k_power_mode mode, bool set_chip, u16 sleep_duration)
{ unsignedint i;
u32 staid, data;
staid = ath5k_hw_reg_read(ah, AR5K_STA_ID1);
switch (mode) { case AR5K_PM_AUTO:
staid &= ~AR5K_STA_ID1_DEFAULT_ANTENNA;
fallthrough; case AR5K_PM_NETWORK_SLEEP: if (set_chip)
ath5k_hw_reg_write(ah,
AR5K_SLEEP_CTL_SLE_ALLOW |
sleep_duration,
AR5K_SLEEP_CTL);
staid |= AR5K_STA_ID1_PWR_SV; break;
case AR5K_PM_FULL_SLEEP: if (set_chip)
ath5k_hw_reg_write(ah, AR5K_SLEEP_CTL_SLE_SLP,
AR5K_SLEEP_CTL);
staid |= AR5K_STA_ID1_PWR_SV; break;
case AR5K_PM_AWAKE:
staid &= ~AR5K_STA_ID1_PWR_SV;
if (!set_chip) goto commit;
data = ath5k_hw_reg_read(ah, AR5K_SLEEP_CTL);
/* If card is down we 'll get 0xffff... so we * need to clean this up before we write the register
*/ if (data & 0xffc00000)
data = 0; else /* Preserve sleep duration etc */
data = data & ~AR5K_SLEEP_CTL_SLE;
ath5k_hw_reg_write(ah, data | AR5K_SLEEP_CTL_SLE_WAKE,
AR5K_SLEEP_CTL);
usleep_range(15, 20);
for (i = 200; i > 0; i--) { /* Check if the chip did wake up */ if ((ath5k_hw_reg_read(ah, AR5K_PCICFG) &
AR5K_PCICFG_SPWR_DN) == 0) break;
/* Wait a bit and retry */
usleep_range(50, 75);
ath5k_hw_reg_write(ah, data | AR5K_SLEEP_CTL_SLE_WAKE,
AR5K_SLEEP_CTL);
}
/* Fail if the chip didn't wake up */ if (i == 0) return -EIO;
/** * ath5k_hw_on_hold() - Put device on hold * @ah: The &struct ath5k_hw * * Put MAC and Baseband on warm reset and keep that state * (don't clean sleep control register). After this MAC * and Baseband are disabled and a full reset is needed * to come back. This way we save as much power as possible * without putting the card on full sleep. * * Returns 0 on success or -EIO on error
*/ int
ath5k_hw_on_hold(struct ath5k_hw *ah)
{ struct pci_dev *pdev = ah->pdev;
u32 bus_flags; int ret;
if (ath5k_get_bus_type(ah) == ATH_AHB) return 0;
/* Make sure device is awake */
ret = ath5k_hw_set_power_mode(ah, AR5K_PM_AWAKE, true, 0); if (ret) {
ATH5K_ERR(ah, "failed to wakeup the MAC Chip\n"); return ret;
}
/* * Put chipset on warm reset... * * Note: putting PCI core on warm reset on PCI-E cards * results card to hang and always return 0xffff... so * we ignore that flag for PCI-E cards. On PCI cards * this flag gets cleared after 64 PCI clocks.
*/
bus_flags = (pdev && pci_is_pcie(pdev)) ? 0 : AR5K_RESET_CTL_PCI;
if (ret) {
ATH5K_ERR(ah, "failed to put device on warm reset\n"); return -EIO;
}
/* ...wakeup again!*/
ret = ath5k_hw_set_power_mode(ah, AR5K_PM_AWAKE, true, 0); if (ret) {
ATH5K_ERR(ah, "failed to put device on hold\n"); return ret;
}
return ret;
}
/** * ath5k_hw_nic_wakeup() - Force card out of sleep * @ah: The &struct ath5k_hw * @channel: The &struct ieee80211_channel * * Bring up MAC + PHY Chips and program PLL * NOTE: Channel is NULL for the initial wakeup. * * Returns 0 on success, -EIO on hw failure or -EINVAL for false channel infos
*/ int
ath5k_hw_nic_wakeup(struct ath5k_hw *ah, struct ieee80211_channel *channel)
{ struct pci_dev *pdev = ah->pdev;
u32 turbo, mode, clock, bus_flags; int ret;
turbo = 0;
mode = 0;
clock = 0;
if ((ath5k_get_bus_type(ah) != ATH_AHB) || channel) { /* Wakeup the device */
ret = ath5k_hw_set_power_mode(ah, AR5K_PM_AWAKE, true, 0); if (ret) {
ATH5K_ERR(ah, "failed to wakeup the MAC Chip\n"); return ret;
}
}
/* * Put chipset on warm reset... * * Note: putting PCI core on warm reset on PCI-E cards * results card to hang and always return 0xffff... so * we ignore that flag for PCI-E cards. On PCI cards * this flag gets cleared after 64 PCI clocks.
*/
bus_flags = (pdev && pci_is_pcie(pdev)) ? 0 : AR5K_RESET_CTL_PCI;
if (ah->ah_version == AR5K_AR5210) {
ret = ath5k_hw_nic_reset(ah, AR5K_RESET_CTL_PCU |
AR5K_RESET_CTL_MAC | AR5K_RESET_CTL_DMA |
AR5K_RESET_CTL_PHY | AR5K_RESET_CTL_PCI);
usleep_range(2000, 2500);
} else { if (ath5k_get_bus_type(ah) == ATH_AHB)
ret = ath5k_hw_wisoc_reset(ah, AR5K_RESET_CTL_PCU |
AR5K_RESET_CTL_BASEBAND); else
ret = ath5k_hw_nic_reset(ah, AR5K_RESET_CTL_PCU |
AR5K_RESET_CTL_BASEBAND | bus_flags);
}
if (ret) {
ATH5K_ERR(ah, "failed to reset the MAC Chip\n"); return -EIO;
}
/* ...wakeup again!...*/
ret = ath5k_hw_set_power_mode(ah, AR5K_PM_AWAKE, true, 0); if (ret) {
ATH5K_ERR(ah, "failed to resume the MAC Chip\n"); return ret;
}
/* ...reset configuration register on Wisoc ... * ...clear reset control register and pull device out of
* warm reset on others */ if (ath5k_get_bus_type(ah) == ATH_AHB)
ret = ath5k_hw_wisoc_reset(ah, 0); else
ret = ath5k_hw_nic_reset(ah, 0);
if (ret) {
ATH5K_ERR(ah, "failed to warm reset the MAC Chip\n"); return -EIO;
}
/* On initialization skip PLL programming since we don't have
* a channel / mode set yet */ if (!channel) return 0;
if (ah->ah_version != AR5K_AR5210) { /* * Get channel mode flags
*/
if (channel->hw_value == AR5K_MODE_11B) {
mode |= AR5K_PHY_MODE_MOD_CCK;
} else { /* XXX Dynamic OFDM/CCK is not supported by the * AR5211 so we set MOD_OFDM for plain g (no * CCK headers) operation. We need to test * this, 5211 might support ofdm-only g after * all, there are also initial register values * in the code for g mode (see initvals.c).
*/ if (ah->ah_version == AR5K_AR5211)
mode |= AR5K_PHY_MODE_MOD_OFDM; else
mode |= AR5K_PHY_MODE_MOD_DYN;
}
} elseif (channel->band == NL80211_BAND_5GHZ) {
mode |= (AR5K_PHY_MODE_FREQ_5GHZ |
AR5K_PHY_MODE_MOD_OFDM);
/* Different PLL setting for 5413 */ if (ah->ah_radio == AR5K_RF5413)
clock = AR5K_PHY_PLL_40MHZ_5413; else
clock |= AR5K_PHY_PLL_40MHZ;
} else {
ATH5K_ERR(ah, "invalid radio frequency mode\n"); return -EINVAL;
}
/*XXX: Can bwmode be used with dynamic mode ?
* (I don't think it supports 44MHz) */ /* On 2425 initvals TURBO_SHORT is not present */ if (ah->ah_bwmode == AR5K_BWMODE_40MHZ) {
turbo = AR5K_PHY_TURBO_MODE; if (ah->ah_radio != AR5K_RF2425)
turbo |= AR5K_PHY_TURBO_SHORT;
} elseif (ah->ah_bwmode != AR5K_BWMODE_DEFAULT) { if (ah->ah_radio == AR5K_RF5413) {
mode |= (ah->ah_bwmode == AR5K_BWMODE_10MHZ) ?
AR5K_PHY_MODE_HALF_RATE :
AR5K_PHY_MODE_QUARTER_RATE;
} elseif (ah->ah_version == AR5K_AR5212) {
clock |= (ah->ah_bwmode == AR5K_BWMODE_10MHZ) ?
AR5K_PHY_PLL_HALF_RATE :
AR5K_PHY_PLL_QUARTER_RATE;
}
}
} else { /* Reset the device */
/* ...enable Atheros turbo mode if requested */ if (ah->ah_bwmode == AR5K_BWMODE_40MHZ)
ath5k_hw_reg_write(ah, AR5K_PHY_TURBO_MODE,
AR5K_PHY_TURBO);
}
if (ah->ah_version != AR5K_AR5210) {
/* ...update PLL if needed */ if (ath5k_hw_reg_read(ah, AR5K_PHY_PLL) != clock) {
ath5k_hw_reg_write(ah, clock, AR5K_PHY_PLL);
usleep_range(300, 350);
}
/** * ath5k_hw_tweak_initval_settings() - Tweak initial settings * @ah: The &struct ath5k_hw * @channel: The &struct ieee80211_channel * * Some settings are not handled on initvals, e.g. bwmode * settings, some phy settings, workarounds etc that in general * don't fit anywhere else or are too small to introduce a separate * function for each one. So we have this function to handle * them all during reset and complete card's initialization.
*/ staticvoid
ath5k_hw_tweak_initval_settings(struct ath5k_hw *ah, struct ieee80211_channel *channel)
{ if (ah->ah_version == AR5K_AR5212 &&
ah->ah_phy_revision >= AR5K_SREV_PHY_5212A) {
/* Only update if needed */ if (ath5k_hw_reg_read(ah, AR5K_PHY_FAST_ADC) != fast_adc)
ath5k_hw_reg_write(ah, fast_adc,
AR5K_PHY_FAST_ADC);
}
/* Fix for first revision of the RF5112 RF chipset */ if (ah->ah_radio == AR5K_RF5112 &&
ah->ah_radio_5ghz_revision <
AR5K_SREV_RAD_5112A) {
u32 data;
ath5k_hw_reg_write(ah, AR5K_PHY_CCKTXCTL_WORLD,
AR5K_PHY_CCKTXCTL); if (channel->band == NL80211_BAND_5GHZ)
data = 0xffb81020; else
data = 0xffb80d20;
ath5k_hw_reg_write(ah, data, AR5K_PHY_FRAME_CTL);
}
if (ah->ah_bwmode) { /* Increase PHY switch and AGC settling time * on turbo mode (ath5k_hw_commit_eeprom_settings
* will override settling time if available) */ if (ah->ah_bwmode == AR5K_BWMODE_40MHZ) {
/* XXX: Initvals indicate we only increase * switch time on AR5212, 5211 and 5210
* only change agc time (bug?) */ if (ah->ah_version == AR5K_AR5212)
AR5K_REG_WRITE_BITS(ah, AR5K_PHY_SETTLING,
AR5K_PHY_SETTLING_SWITCH,
AR5K_SWITCH_SETTLING_TURBO);
if (ah->ah_version == AR5K_AR5210) { /* Set Frame Control Register */
ath5k_hw_reg_write(ah,
(AR5K_PHY_FRAME_CTL_INI |
AR5K_PHY_TURBO_MODE |
AR5K_PHY_TURBO_SHORT | 0x2020),
AR5K_PHY_FRAME_CTL_5210);
} /* On 5413 PHY force window length for half/quarter rate*/
} elseif ((ah->ah_mac_srev >= AR5K_SREV_AR5424) &&
(ah->ah_mac_srev <= AR5K_SREV_AR5414)) {
AR5K_REG_WRITE_BITS(ah, AR5K_PHY_FRAME_CTL_5211,
AR5K_PHY_FRAME_CTL_WIN_LEN,
3);
}
} elseif (ah->ah_version == AR5K_AR5210) { /* Set Frame Control Register for normal operation */
ath5k_hw_reg_write(ah, (AR5K_PHY_FRAME_CTL_INI | 0x1020),
AR5K_PHY_FRAME_CTL_5210);
}
}
/** * ath5k_hw_commit_eeprom_settings() - Commit settings from EEPROM * @ah: The &struct ath5k_hw * @channel: The &struct ieee80211_channel * * Use settings stored on EEPROM to properly initialize the card * based on various infos and per-mode calibration data.
*/ staticvoid
ath5k_hw_commit_eeprom_settings(struct ath5k_hw *ah, struct ieee80211_channel *channel)
{ struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
s16 cck_ofdm_pwr_delta;
u8 ee_mode;
/* TODO: Add support for AR5210 EEPROM */ if (ah->ah_version == AR5K_AR5210) return;
/* Adjust power delta for channel 14 */ if (channel->center_freq == 2484)
cck_ofdm_pwr_delta =
((ee->ee_cck_ofdm_power_delta -
ee->ee_scaled_cck_delta) * 2) / 10; else
cck_ofdm_pwr_delta =
(ee->ee_cck_ofdm_power_delta * 2) / 10;
/* Set CCK to OFDM power delta on tx power
* adjustment register */ if (ah->ah_phy_revision >= AR5K_SREV_PHY_5212A) { if (channel->hw_value == AR5K_MODE_11G)
ath5k_hw_reg_write(ah,
AR5K_REG_SM((ee->ee_cck_ofdm_gain_delta * -1),
AR5K_PHY_TX_PWR_ADJ_CCK_GAIN_DELTA) |
AR5K_REG_SM((cck_ofdm_pwr_delta * -1),
AR5K_PHY_TX_PWR_ADJ_CCK_PCDAC_INDEX),
AR5K_PHY_TX_PWR_ADJ); else
ath5k_hw_reg_write(ah, 0, AR5K_PHY_TX_PWR_ADJ);
} else { /* For older revs we scale power on sw during tx power
* setup */
ah->ah_txpower.txp_cck_ofdm_pwr_delta = cck_ofdm_pwr_delta;
ah->ah_txpower.txp_cck_ofdm_gainf_delta =
ee->ee_cck_ofdm_gain_delta;
}
/* XXX: necessary here? is called from ath5k_hw_set_antenna_mode()
* too */
ath5k_hw_set_antenna_switch(ah, ee_mode);
/* False detect backoff for channels * that have spur noise. Write the new
* cyclic power RSSI threshold. */ if (ath5k_hw_chan_has_spur_noise(ah, channel))
AR5K_REG_WRITE_BITS(ah, AR5K_PHY_OFDM_SELFCORR,
AR5K_PHY_OFDM_SELFCORR_CYPWR_THR1,
AR5K_INIT_CYCRSSI_THR1 +
ee->ee_false_detect[ee_mode]); else
AR5K_REG_WRITE_BITS(ah, AR5K_PHY_OFDM_SELFCORR,
AR5K_PHY_OFDM_SELFCORR_CYPWR_THR1,
AR5K_INIT_CYCRSSI_THR1);
/* I/Q correction (set enable bit last to match HAL sources) */ /* TODO: Per channel i/q infos ? */ if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_4_0) {
AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_Q_I_COFF,
ee->ee_i_cal[ee_mode]);
AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_Q_Q_COFF,
ee->ee_q_cal[ee_mode]);
AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_ENABLE);
}
/* Heavy clipping -disable for now */ if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_5_1)
ath5k_hw_reg_write(ah, 0, AR5K_PHY_HEAVY_CLIP_ENABLE);
}
/*********************\ * Main reset function *
\*********************/
/** * ath5k_hw_reset() - The main reset function * @ah: The &struct ath5k_hw * @op_mode: One of enum nl80211_iftype * @channel: The &struct ieee80211_channel * @fast: Enable fast channel switching * @skip_pcu: Skip pcu initialization * * This is the function we call each time we want to (re)initialize the * card and pass new settings to hw. We also call it when hw runs into * trouble to make it come back to a working state. * * Returns 0 on success, -EINVAL on false op_mode or channel infos, or -EIO * on failure.
*/ int
ath5k_hw_reset(struct ath5k_hw *ah, enum nl80211_iftype op_mode, struct ieee80211_channel *channel, bool fast, bool skip_pcu)
{
u32 s_seq[10], s_led[3], tsf_up, tsf_lo;
u8 mode; int i, ret;
tsf_up = 0;
tsf_lo = 0;
mode = 0;
/* * Sanity check for fast flag * Fast channel change only available * on AR2413/AR5413.
*/ if (fast && (ah->ah_radio != AR5K_RF2413) &&
(ah->ah_radio != AR5K_RF5413))
fast = false;
/* Disable sleep clock operation * to avoid register access delay on certain
* PHY registers */ if (ah->ah_version == AR5K_AR5212)
ath5k_hw_set_sleep_clock(ah, false);
mode = channel->hw_value; switch (mode) { case AR5K_MODE_11A: break; case AR5K_MODE_11G: if (ah->ah_version <= AR5K_AR5211) {
ATH5K_ERR(ah, "G mode not available on 5210/5211"); return -EINVAL;
} break; case AR5K_MODE_11B: if (ah->ah_version < AR5K_AR5211) {
ATH5K_ERR(ah, "B mode not available on 5210"); return -EINVAL;
} break; default:
ATH5K_ERR(ah, "invalid channel: %d\n", channel->center_freq); return -EINVAL;
}
/* * If driver requested fast channel change and DMA has stopped * go on. If it fails continue with a normal reset.
*/ if (fast) {
ret = ath5k_hw_phy_init(ah, channel, mode, true); if (ret) {
ATH5K_DBG(ah, ATH5K_DEBUG_RESET, "fast chan change failed, falling back to normal reset\n"); /* Non fatal, can happen eg.
* on mode change */
ret = 0;
} else {
ATH5K_DBG(ah, ATH5K_DEBUG_RESET, "fast chan change successful\n"); return 0;
}
}
/* * Save some registers before a reset
*/ if (ah->ah_version != AR5K_AR5210) { /* * Save frame sequence count * For revs. after Oahu, only save * seq num for DCU 0 (Global seq num)
*/ if (ah->ah_mac_srev < AR5K_SREV_AR5211) {
for (i = 0; i < 10; i++)
s_seq[i] = ath5k_hw_reg_read(ah,
AR5K_QUEUE_DCU_SEQNUM(i));
/* TSF accelerates on AR5211 during reset * As a workaround save it here and restore * it later so that it's back in time after * reset. This way it'll get re-synced on the * next beacon without breaking ad-hoc. * * On AR5212 TSF is almost preserved across a * reset so it stays back in time anyway and * we don't have to save/restore it. * * XXX: Since this breaks power saving we have * to disable power saving until we receive the
* next beacon, so we can resync beacon timers */ if (ah->ah_version == AR5K_AR5211) {
tsf_up = ath5k_hw_reg_read(ah, AR5K_TSF_U32);
tsf_lo = ath5k_hw_reg_read(ah, AR5K_TSF_L32);
}
}
/* * Since we are going to write rf buffer * check if we have any pending gain_F * optimization settings
*/ if (ah->ah_version == AR5K_AR5212 &&
(ah->ah_radio <= AR5K_RF5112)) { if (!fast && ah->ah_rf_banks != NULL)
ath5k_hw_gainf_calibrate(ah);
}
/* Wakeup the device */
ret = ath5k_hw_nic_wakeup(ah, channel); if (ret) return ret;
/* * Enable 32KHz clock function for AR5212+ chips * Set clocks to 32KHz operation and use an * external 32KHz crystal when sleeping if one * exists. * Disabled by default because it is also disabled in * other drivers and it is known to cause stability * issues on some devices
*/ if (ah->ah_use_32khz_clock && ah->ah_version == AR5K_AR5212 &&
op_mode != NL80211_IFTYPE_AP)
ath5k_hw_set_sleep_clock(ah, true);
/* * Disable beacons and reset the TSF
*/
AR5K_REG_DISABLE_BITS(ah, AR5K_BEACON, AR5K_BEACON_ENABLE);
ath5k_hw_reset_tsf(ah); return 0;
}
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