Commit 84656762 authored by Nick Kossifidis's avatar Nick Kossifidis Committed by John W. Linville
Browse files

ath5k: Minor QCU updates 



* Sync qcu.c with legacy-hal
* Add some more comments
* Set QCU mask to save power (QCU mask controls which QCUs are attached
  to each DCU, we do a 1:1 mapping)

TODO: Use max QCU from EEPROM, further sync with legacy-hal and sam's
hal and a few more minor fixes.

I think after this we are ready to implement WME on the driver
part. Anyone interested ?

Signed-Off-by: default avatarNick Kossifidis <mickflemm@gmail.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 8fe12920

drivers/net/wireless/ath5k/qcu.c

+36 −11
Original line number Diff line number Diff line
@@ -148,6 +148,7 @@ int ath5k_hw_setup_tx_queue(struct ath5k_hw *ah, enum ath5k_tx_queue queue_type, 
 */

u32 ath5k_hw_num_tx_pending(struct ath5k_hw *ah, unsigned int queue)

{

	u32 pending;

	ATH5K_TRACE(ah->ah_sc);

	AR5K_ASSERT_ENTRY(queue, ah->ah_capabilities.cap_queues.q_tx_num);
@@ -159,7 +160,15 @@ u32 ath5k_hw_num_tx_pending(struct ath5k_hw *ah, unsigned int queue) 
	if (ah->ah_version == AR5K_AR5210)

		return false;



	return AR5K_QUEUE_STATUS(queue) & AR5K_QCU_STS_FRMPENDCNT;

	pending = (AR5K_QUEUE_STATUS(queue) & AR5K_QCU_STS_FRMPENDCNT);



	/* It's possible to have no frames pending even if TXE

	 * is set. To indicate that q has not stopped return

	 * true */

	if (!pending && AR5K_REG_READ_Q(ah, AR5K_QCU_TXE, queue))

		return true;



	return pending;

}



/*
@@ -324,8 +333,18 @@ int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue) 
		/*

		 * Set misc registers

		 */

		ath5k_hw_reg_write(ah, AR5K_QCU_MISC_DCU_EARLY,

			AR5K_QUEUE_MISC(queue));

		/* 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,
@@ -341,7 +360,8 @@ int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue) 
					AR5K_QCU_MISC_CBR_THRES_ENABLE);

		}



		if (tq->tqi_ready_time)

		if (tq->tqi_ready_time &&

		(tq->tqi_type != AR5K_TX_QUEUE_ID_CAB))

			ath5k_hw_reg_write(ah, AR5K_REG_SM(tq->tqi_ready_time,

				AR5K_QCU_RDYTIMECFG_INTVAL) |

				AR5K_QCU_RDYTIMECFG_ENABLE,
@@ -383,13 +403,6 @@ int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue) 
				AR5K_DCU_MISC_ARBLOCK_CTL_S) |

				AR5K_DCU_MISC_POST_FR_BKOFF_DIS |

				AR5K_DCU_MISC_BCN_ENABLE);



			ath5k_hw_reg_write(ah, ((AR5K_TUNE_BEACON_INTERVAL -

				(AR5K_TUNE_SW_BEACON_RESP -

				AR5K_TUNE_DMA_BEACON_RESP) -

				AR5K_TUNE_ADDITIONAL_SWBA_BACKOFF) * 1024) |

				AR5K_QCU_RDYTIMECFG_ENABLE,

				AR5K_QUEUE_RDYTIMECFG(queue));

			break;



		case AR5K_TX_QUEUE_CAB:
@@ -398,6 +411,13 @@ int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue) 
				AR5K_QCU_MISC_CBREXP_DIS |

				AR5K_QCU_MISC_CBREXP_BCN_DIS);



			ath5k_hw_reg_write(ah, ((AR5K_TUNE_BEACON_INTERVAL -

				(AR5K_TUNE_SW_BEACON_RESP -

				AR5K_TUNE_DMA_BEACON_RESP) -

				AR5K_TUNE_ADDITIONAL_SWBA_BACKOFF) * 1024) |

				AR5K_QCU_RDYTIMECFG_ENABLE,

				AR5K_QUEUE_RDYTIMECFG(queue));



			AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_DFS_MISC(queue),

				(AR5K_DCU_MISC_ARBLOCK_CTL_GLOBAL <<

				AR5K_DCU_MISC_ARBLOCK_CTL_S));
@@ -413,6 +433,8 @@ int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue) 
			break;

		}



		/* TODO: Handle frame compression */



		/*

		 * Enable interrupts for this tx queue

		 * in the secondary interrupt mask registers
@@ -483,6 +505,9 @@ int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue) 
		 * 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;

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