diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/ar9003_rtt.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/ar9003_rtt.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_rtt.c b/drivers/net/wireless/ath/ath9k/ar9003_rtt.c new file mode 100644 index 000000000000..48803ee9c0d6 --- /dev/null +++ b/drivers/net/wireless/ath/ath9k/ar9003_rtt.c @@ -0,0 +1,153 @@ +/* + * Copyright (c) 2010-2011 Atheros Communications Inc. + * + * Permission to use, copy, modify, and/or 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 "hw.h" +#include "ar9003_phy.h" + +#define RTT_RESTORE_TIMEOUT 1000 +#define RTT_ACCESS_TIMEOUT 100 +#define RTT_BAD_VALUE 0x0bad0bad + +/* + * RTT (Radio Retention Table) hardware implementation information + * + * There is an internal table (i.e. the rtt) for each chain (or bank). + * Each table contains 6 entries and each entry is corresponding to + * a specific calibration parameter as depicted below. + * 0~2 - DC offset DAC calibration: loop, low, high (offsetI/Q_...) + * 3 - Filter cal (filterfc) + * 4 - RX gain settings + * 5 - Peak detector offset calibration (agc_caldac) + */ + +void ar9003_hw_rtt_enable(struct ath_hw *ah) +{ + REG_WRITE(ah, AR_PHY_RTT_CTRL, 1); +} + +void ar9003_hw_rtt_disable(struct ath_hw *ah) +{ + REG_WRITE(ah, AR_PHY_RTT_CTRL, 0); +} + +void ar9003_hw_rtt_set_mask(struct ath_hw *ah, u32 rtt_mask) +{ + REG_RMW_FIELD(ah, AR_PHY_RTT_CTRL, + AR_PHY_RTT_CTRL_RESTORE_MASK, rtt_mask); +} + +bool ar9003_hw_rtt_force_restore(struct ath_hw *ah) +{ + if (!ath9k_hw_wait(ah, AR_PHY_RTT_CTRL, + AR_PHY_RTT_CTRL_FORCE_RADIO_RESTORE, + 0, RTT_RESTORE_TIMEOUT)) + return false; + + REG_RMW_FIELD(ah, AR_PHY_RTT_CTRL, + AR_PHY_RTT_CTRL_FORCE_RADIO_RESTORE, 1); + + if (!ath9k_hw_wait(ah, AR_PHY_RTT_CTRL, + AR_PHY_RTT_CTRL_FORCE_RADIO_RESTORE, + 0, RTT_RESTORE_TIMEOUT)) + return false; + + return true; +} + +static void ar9003_hw_rtt_load_hist_entry(struct ath_hw *ah, u8 chain, + u32 index, u32 data28) +{ + u32 val; + + val = SM(data28, AR_PHY_RTT_SW_RTT_TABLE_DATA); + REG_WRITE(ah, AR_PHY_RTT_TABLE_SW_INTF_1_B(chain), val); + + val = SM(0, AR_PHY_RTT_SW_RTT_TABLE_ACCESS) | + SM(1, AR_PHY_RTT_SW_RTT_TABLE_WRITE) | + SM(index, AR_PHY_RTT_SW_RTT_TABLE_ADDR); + REG_WRITE(ah, AR_PHY_RTT_TABLE_SW_INTF_B(chain), val); + udelay(1); + + val |= SM(1, AR_PHY_RTT_SW_RTT_TABLE_ACCESS); + REG_WRITE(ah, AR_PHY_RTT_TABLE_SW_INTF_B(chain), val); + udelay(1); + + if (!ath9k_hw_wait(ah, AR_PHY_RTT_TABLE_SW_INTF_B(chain), + AR_PHY_RTT_SW_RTT_TABLE_ACCESS, 0, + RTT_ACCESS_TIMEOUT)) + return; + + val &= ~SM(1, AR_PHY_RTT_SW_RTT_TABLE_WRITE); + REG_WRITE(ah, AR_PHY_RTT_TABLE_SW_INTF_B(chain), val); + udelay(1); + + ath9k_hw_wait(ah, AR_PHY_RTT_TABLE_SW_INTF_B(chain), + AR_PHY_RTT_SW_RTT_TABLE_ACCESS, 0, + RTT_ACCESS_TIMEOUT); +} + +void ar9003_hw_rtt_load_hist(struct ath_hw *ah, u8 chain, u32 *table) +{ + int i; + + for (i = 0; i < MAX_RTT_TABLE_ENTRY; i++) + ar9003_hw_rtt_load_hist_entry(ah, chain, i, table[i]); +} + +static int ar9003_hw_rtt_fill_hist_entry(struct ath_hw *ah, u8 chain, u32 index) +{ + u32 val; + + val = SM(0, AR_PHY_RTT_SW_RTT_TABLE_ACCESS) | + SM(0, AR_PHY_RTT_SW_RTT_TABLE_WRITE) | + SM(index, AR_PHY_RTT_SW_RTT_TABLE_ADDR); + + REG_WRITE(ah, AR_PHY_RTT_TABLE_SW_INTF_B(chain), val); + udelay(1); + + val |= SM(1, AR_PHY_RTT_SW_RTT_TABLE_ACCESS); + REG_WRITE(ah, AR_PHY_RTT_TABLE_SW_INTF_B(chain), val); + udelay(1); + + if (!ath9k_hw_wait(ah, AR_PHY_RTT_TABLE_SW_INTF_B(chain), + AR_PHY_RTT_SW_RTT_TABLE_ACCESS, 0, + RTT_ACCESS_TIMEOUT)) + return RTT_BAD_VALUE; + + val = REG_READ(ah, AR_PHY_RTT_TABLE_SW_INTF_1_B(chain)); + + return val; +} + +void ar9003_hw_rtt_fill_hist(struct ath_hw *ah, u8 chain, u32 *table) +{ + int i; + + for (i = 0; i < MAX_RTT_TABLE_ENTRY; i++) + table[i] = ar9003_hw_rtt_fill_hist_entry(ah, chain, i); +} + +void ar9003_hw_rtt_clear_hist(struct ath_hw *ah) +{ + int i, j; + + for (i = 0; i < AR9300_MAX_CHAINS; i++) { + if (!(ah->rxchainmask & (1 << i))) + continue; + for (j = 0; j < MAX_RTT_TABLE_ENTRY; j++) + ar9003_hw_rtt_load_hist_entry(ah, i, j, 0); + } +} |