--- /dev/null
+/*
+ * Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org>
+ * Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com>
+ *
+ * Lightly modified for iPXE, July 2009, by Joshua Oreman <oremanj@rwcr.net>.
+ *
+ * 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.
+ *
+ */
+
+FILE_LICENCE ( MIT );
+
+/********************************************\
+Queue Control Unit, DFS Control Unit Functions
+\********************************************/
+
+#include "ath5k.h"
+#include "reg.h"
+#include "base.h"
+
+/*
+ * Set properties for a transmit queue
+ */
+int ath5k_hw_set_tx_queueprops(struct ath5k_hw *ah,
+ const struct ath5k_txq_info *queue_info)
+{
+ if (ah->ah_txq.tqi_type == AR5K_TX_QUEUE_INACTIVE)
+ return -EIO;
+
+ memcpy(&ah->ah_txq, queue_info, sizeof(struct ath5k_txq_info));
+
+ /*XXX: Is this supported on 5210 ?*/
+ if ((queue_info->tqi_type == AR5K_TX_QUEUE_DATA &&
+ ((queue_info->tqi_subtype == AR5K_WME_AC_VI) ||
+ (queue_info->tqi_subtype == AR5K_WME_AC_VO))) ||
+ queue_info->tqi_type == AR5K_TX_QUEUE_UAPSD)
+ ah->ah_txq.tqi_flags |= AR5K_TXQ_FLAG_POST_FR_BKOFF_DIS;
+
+ return 0;
+}
+
+/*
+ * Initialize a transmit queue
+ */
+int ath5k_hw_setup_tx_queue(struct ath5k_hw *ah, enum ath5k_tx_queue queue_type,
+ struct ath5k_txq_info *queue_info)
+{
+ int ret;
+
+ /*
+ * Setup internal queue structure
+ */
+ memset(&ah->ah_txq, 0, sizeof(struct ath5k_txq_info));
+ ah->ah_txq.tqi_type = queue_type;
+
+ if (queue_info != NULL) {
+ queue_info->tqi_type = queue_type;
+ ret = ath5k_hw_set_tx_queueprops(ah, queue_info);
+ if (ret)
+ return ret;
+ }
+
+ /*
+ * We use ah_txq_status to hold a temp value for
+ * the Secondary interrupt mask registers on 5211+
+ * check out ath5k_hw_reset_tx_queue
+ */
+ AR5K_Q_ENABLE_BITS(ah->ah_txq_status, 0);
+
+ return 0;
+}
+
+/*
+ * Set a transmit queue inactive
+ */
+void ath5k_hw_release_tx_queue(struct ath5k_hw *ah)
+{
+ /* This queue will be skipped in further operations */
+ ah->ah_txq.tqi_type = AR5K_TX_QUEUE_INACTIVE;
+ /*For SIMR setup*/
+ AR5K_Q_DISABLE_BITS(ah->ah_txq_status, 0);
+}
+
+/*
+ * Set DFS properties for a transmit queue on DCU
+ */
+int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah)
+{
+ u32 cw_min, cw_max, retry_lg, retry_sh;
+ struct ath5k_txq_info *tq = &ah->ah_txq;
+ const int queue = 0;
+
+ tq = &ah->ah_txq;
+
+ if (tq->tqi_type == AR5K_TX_QUEUE_INACTIVE)
+ return 0;
+
+ if (ah->ah_version == AR5K_AR5210) {
+ /* Only handle data queues, others will be ignored */
+ if (tq->tqi_type != AR5K_TX_QUEUE_DATA)
+ return 0;
+
+ /* Set Slot time */
+ ath5k_hw_reg_write(ah, ah->ah_turbo ?
+ AR5K_INIT_SLOT_TIME_TURBO : AR5K_INIT_SLOT_TIME,
+ AR5K_SLOT_TIME);
+ /* Set ACK_CTS timeout */
+ ath5k_hw_reg_write(ah, ah->ah_turbo ?
+ AR5K_INIT_ACK_CTS_TIMEOUT_TURBO :
+ AR5K_INIT_ACK_CTS_TIMEOUT, AR5K_SLOT_TIME);
+ /* Set Transmit Latency */
+ ath5k_hw_reg_write(ah, ah->ah_turbo ?
+ AR5K_INIT_TRANSMIT_LATENCY_TURBO :
+ AR5K_INIT_TRANSMIT_LATENCY, AR5K_USEC_5210);
+
+ /* Set IFS0 */
+ if (ah->ah_turbo) {
+ ath5k_hw_reg_write(ah, ((AR5K_INIT_SIFS_TURBO +
+ (ah->ah_aifs + tq->tqi_aifs) *
+ AR5K_INIT_SLOT_TIME_TURBO) <<
+ AR5K_IFS0_DIFS_S) | AR5K_INIT_SIFS_TURBO,
+ AR5K_IFS0);
+ } else {
+ ath5k_hw_reg_write(ah, ((AR5K_INIT_SIFS +
+ (ah->ah_aifs + tq->tqi_aifs) *
+ AR5K_INIT_SLOT_TIME) << AR5K_IFS0_DIFS_S) |
+ AR5K_INIT_SIFS, AR5K_IFS0);
+ }
+
+ /* Set IFS1 */
+ ath5k_hw_reg_write(ah, ah->ah_turbo ?
+ AR5K_INIT_PROTO_TIME_CNTRL_TURBO :
+ AR5K_INIT_PROTO_TIME_CNTRL, AR5K_IFS1);
+ /* Set AR5K_PHY_SETTLING */
+ ath5k_hw_reg_write(ah, ah->ah_turbo ?
+ (ath5k_hw_reg_read(ah, AR5K_PHY_SETTLING) & ~0x7F)
+ | 0x38 :
+ (ath5k_hw_reg_read(ah, AR5K_PHY_SETTLING) & ~0x7F)
+ | 0x1C,
+ AR5K_PHY_SETTLING);
+ /* Set Frame Control Register */
+ ath5k_hw_reg_write(ah, ah->ah_turbo ?
+ (AR5K_PHY_FRAME_CTL_INI | AR5K_PHY_TURBO_MODE |
+ AR5K_PHY_TURBO_SHORT | 0x2020) :
+ (AR5K_PHY_FRAME_CTL_INI | 0x1020),
+ AR5K_PHY_FRAME_CTL_5210);
+ }
+
+ /*
+ * Calculate cwmin/max by channel mode
+ */
+ cw_min = ah->ah_cw_min = AR5K_TUNE_CWMIN;
+ cw_max = ah->ah_cw_max = AR5K_TUNE_CWMAX;
+ ah->ah_aifs = AR5K_TUNE_AIFS;
+ /*XR is only supported on 5212*/
+ if (IS_CHAN_XR(ah->ah_current_channel) &&
+ ah->ah_version == AR5K_AR5212) {
+ cw_min = ah->ah_cw_min = AR5K_TUNE_CWMIN_XR;
+ cw_max = ah->ah_cw_max = AR5K_TUNE_CWMAX_XR;
+ ah->ah_aifs = AR5K_TUNE_AIFS_XR;
+ /*B mode is not supported on 5210*/
+ } else if (IS_CHAN_B(ah->ah_current_channel) &&
+ ah->ah_version != AR5K_AR5210) {
+ cw_min = ah->ah_cw_min = AR5K_TUNE_CWMIN_11B;
+ cw_max = ah->ah_cw_max = AR5K_TUNE_CWMAX_11B;
+ ah->ah_aifs = AR5K_TUNE_AIFS_11B;
+ }
+
+ cw_min = 1;
+ while (cw_min < ah->ah_cw_min)
+ cw_min = (cw_min << 1) | 1;
+
+ cw_min = tq->tqi_cw_min < 0 ? (cw_min >> (-tq->tqi_cw_min)) :
+ ((cw_min << tq->tqi_cw_min) + (1 << tq->tqi_cw_min) - 1);
+ cw_max = tq->tqi_cw_max < 0 ? (cw_max >> (-tq->tqi_cw_max)) :
+ ((cw_max << tq->tqi_cw_max) + (1 << tq->tqi_cw_max) - 1);
+
+ /*
+ * Calculate and set retry limits
+ */
+ if (ah->ah_software_retry) {
+ /* XXX Need to test this */
+ retry_lg = ah->ah_limit_tx_retries;
+ retry_sh = retry_lg = retry_lg > AR5K_DCU_RETRY_LMT_SH_RETRY ?
+ AR5K_DCU_RETRY_LMT_SH_RETRY : retry_lg;
+ } else {
+ retry_lg = AR5K_INIT_LG_RETRY;
+ retry_sh = AR5K_INIT_SH_RETRY;
+ }
+
+ /*No QCU/DCU [5210]*/
+ if (ah->ah_version == AR5K_AR5210) {
+ ath5k_hw_reg_write(ah,
+ (cw_min << AR5K_NODCU_RETRY_LMT_CW_MIN_S)
+ | AR5K_REG_SM(AR5K_INIT_SLG_RETRY,
+ AR5K_NODCU_RETRY_LMT_SLG_RETRY)
+ | AR5K_REG_SM(AR5K_INIT_SSH_RETRY,
+ AR5K_NODCU_RETRY_LMT_SSH_RETRY)
+ | AR5K_REG_SM(retry_lg, AR5K_NODCU_RETRY_LMT_LG_RETRY)
+ | AR5K_REG_SM(retry_sh, AR5K_NODCU_RETRY_LMT_SH_RETRY),
+ AR5K_NODCU_RETRY_LMT);
+ } else {
+ /*QCU/DCU [5211+]*/
+ ath5k_hw_reg_write(ah,
+ AR5K_REG_SM(AR5K_INIT_SLG_RETRY,
+ AR5K_DCU_RETRY_LMT_SLG_RETRY) |
+ AR5K_REG_SM(AR5K_INIT_SSH_RETRY,
+ AR5K_DCU_RETRY_LMT_SSH_RETRY) |
+ AR5K_REG_SM(retry_lg, AR5K_DCU_RETRY_LMT_LG_RETRY) |
+ AR5K_REG_SM(retry_sh, AR5K_DCU_RETRY_LMT_SH_RETRY),
+ AR5K_QUEUE_DFS_RETRY_LIMIT(queue));
+
+ /*===Rest is also for QCU/DCU only [5211+]===*/
+
+ /*
+ * Set initial content window (cw_min/cw_max)
+ * and arbitrated interframe space (aifs)...
+ */
+ ath5k_hw_reg_write(ah,
+ AR5K_REG_SM(cw_min, AR5K_DCU_LCL_IFS_CW_MIN) |
+ AR5K_REG_SM(cw_max, AR5K_DCU_LCL_IFS_CW_MAX) |
+ AR5K_REG_SM(ah->ah_aifs + tq->tqi_aifs,
+ AR5K_DCU_LCL_IFS_AIFS),
+ AR5K_QUEUE_DFS_LOCAL_IFS(queue));
+
+ /*
+ * Set misc registers
+ */
+ /* Enable DCU early termination for this queue */
+ AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_MISC(queue),
+ AR5K_QCU_MISC_DCU_EARLY);
+
+ /* Enable DCU to wait for next fragment from QCU */
+ AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_DFS_MISC(queue),
+ AR5K_DCU_MISC_FRAG_WAIT);
+
+ /* On Maui and Spirit use the global seqnum on DCU */
+ if (ah->ah_mac_version < AR5K_SREV_AR5211)
+ AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_DFS_MISC(queue),
+ AR5K_DCU_MISC_SEQNUM_CTL);
+
+ if (tq->tqi_cbr_period) {
+ ath5k_hw_reg_write(ah, AR5K_REG_SM(tq->tqi_cbr_period,
+ AR5K_QCU_CBRCFG_INTVAL) |
+ AR5K_REG_SM(tq->tqi_cbr_overflow_limit,
+ AR5K_QCU_CBRCFG_ORN_THRES),
+ AR5K_QUEUE_CBRCFG(queue));
+ AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_MISC(queue),
+ AR5K_QCU_MISC_FRSHED_CBR);
+ if (tq->tqi_cbr_overflow_limit)
+ AR5K_REG_ENABLE_BITS(ah,
+ AR5K_QUEUE_MISC(queue),
+ AR5K_QCU_MISC_CBR_THRES_ENABLE);
+ }
+
+ if (tq->tqi_ready_time &&
+ (tq->tqi_type != AR5K_TX_QUEUE_CAB))
+ ath5k_hw_reg_write(ah, AR5K_REG_SM(tq->tqi_ready_time,
+ AR5K_QCU_RDYTIMECFG_INTVAL) |
+ AR5K_QCU_RDYTIMECFG_ENABLE,
+ AR5K_QUEUE_RDYTIMECFG(queue));
+
+ if (tq->tqi_burst_time) {
+ ath5k_hw_reg_write(ah, AR5K_REG_SM(tq->tqi_burst_time,
+ AR5K_DCU_CHAN_TIME_DUR) |
+ AR5K_DCU_CHAN_TIME_ENABLE,
+ AR5K_QUEUE_DFS_CHANNEL_TIME(queue));
+
+ if (tq->tqi_flags
+ & AR5K_TXQ_FLAG_RDYTIME_EXP_POLICY_ENABLE)
+ AR5K_REG_ENABLE_BITS(ah,
+ AR5K_QUEUE_MISC(queue),
+ AR5K_QCU_MISC_RDY_VEOL_POLICY);
+ }
+
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_BACKOFF_DISABLE)
+ ath5k_hw_reg_write(ah, AR5K_DCU_MISC_POST_FR_BKOFF_DIS,
+ AR5K_QUEUE_DFS_MISC(queue));
+
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_FRAG_BURST_BACKOFF_ENABLE)
+ ath5k_hw_reg_write(ah, AR5K_DCU_MISC_BACKOFF_FRAG,
+ AR5K_QUEUE_DFS_MISC(queue));
+
+ /* TODO: Handle frame compression */
+
+ /*
+ * Enable interrupts for this tx queue
+ * in the secondary interrupt mask registers
+ */
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_TXOKINT_ENABLE)
+ AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_txok, queue);
+
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_TXERRINT_ENABLE)
+ AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_txerr, queue);
+
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_TXURNINT_ENABLE)
+ AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_txurn, queue);
+
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_TXDESCINT_ENABLE)
+ AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_txdesc, queue);
+
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_TXEOLINT_ENABLE)
+ AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_txeol, queue);
+
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_CBRORNINT_ENABLE)
+ AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_cbrorn, queue);
+
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_CBRURNINT_ENABLE)
+ AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_cbrurn, queue);
+
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_QTRIGINT_ENABLE)
+ AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_qtrig, queue);
+
+ if (tq->tqi_flags & AR5K_TXQ_FLAG_TXNOFRMINT_ENABLE)
+ AR5K_Q_ENABLE_BITS(ah->ah_txq_imr_nofrm, queue);
+
+ /* Update secondary interrupt mask registers */
+
+ /* Filter out inactive queues */
+ ah->ah_txq_imr_txok &= ah->ah_txq_status;
+ ah->ah_txq_imr_txerr &= ah->ah_txq_status;
+ ah->ah_txq_imr_txurn &= ah->ah_txq_status;
+ ah->ah_txq_imr_txdesc &= ah->ah_txq_status;
+ ah->ah_txq_imr_txeol &= ah->ah_txq_status;
+ ah->ah_txq_imr_cbrorn &= ah->ah_txq_status;
+ ah->ah_txq_imr_cbrurn &= ah->ah_txq_status;
+ ah->ah_txq_imr_qtrig &= ah->ah_txq_status;
+ ah->ah_txq_imr_nofrm &= ah->ah_txq_status;
+
+ ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txq_imr_txok,
+ AR5K_SIMR0_QCU_TXOK) |
+ AR5K_REG_SM(ah->ah_txq_imr_txdesc,
+ AR5K_SIMR0_QCU_TXDESC), AR5K_SIMR0);
+ ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txq_imr_txerr,
+ AR5K_SIMR1_QCU_TXERR) |
+ AR5K_REG_SM(ah->ah_txq_imr_txeol,
+ AR5K_SIMR1_QCU_TXEOL), AR5K_SIMR1);
+ /* Update simr2 but don't overwrite rest simr2 settings */
+ AR5K_REG_DISABLE_BITS(ah, AR5K_SIMR2, AR5K_SIMR2_QCU_TXURN);
+ AR5K_REG_ENABLE_BITS(ah, AR5K_SIMR2,
+ AR5K_REG_SM(ah->ah_txq_imr_txurn,
+ AR5K_SIMR2_QCU_TXURN));
+ ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txq_imr_cbrorn,
+ AR5K_SIMR3_QCBRORN) |
+ AR5K_REG_SM(ah->ah_txq_imr_cbrurn,
+ AR5K_SIMR3_QCBRURN), AR5K_SIMR3);
+ ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txq_imr_qtrig,
+ AR5K_SIMR4_QTRIG), AR5K_SIMR4);
+ /* Set TXNOFRM_QCU for the queues with TXNOFRM enabled */
+ ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txq_imr_nofrm,
+ AR5K_TXNOFRM_QCU), AR5K_TXNOFRM);
+ /* No queue has TXNOFRM enabled, disable the interrupt
+ * by setting AR5K_TXNOFRM to zero */
+ if (ah->ah_txq_imr_nofrm == 0)
+ ath5k_hw_reg_write(ah, 0, AR5K_TXNOFRM);
+
+ /* Set QCU mask for this DCU to save power */
+ AR5K_REG_WRITE_Q(ah, AR5K_QUEUE_QCUMASK(queue), queue);
+ }
+
+ return 0;
+}
+
+/*
+ * Set slot time on DCU
+ */
+int ath5k_hw_set_slot_time(struct ath5k_hw *ah, unsigned int slot_time)
+{
+ if (slot_time < AR5K_SLOT_TIME_9 || slot_time > AR5K_SLOT_TIME_MAX)
+ return -EINVAL;
+
+ if (ah->ah_version == AR5K_AR5210)
+ ath5k_hw_reg_write(ah, ath5k_hw_htoclock(slot_time,
+ ah->ah_turbo), AR5K_SLOT_TIME);
+ else
+ ath5k_hw_reg_write(ah, slot_time, AR5K_DCU_GBL_IFS_SLOT);
+
+ return 0;
+}
+
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