/* * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting * Copyright (c) 2002-2004 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. * * $Id: ar5210_recv.c,v 1.1.1.1 2008/12/11 04:46:28 alc Exp $ */ #include "opt_ah.h" #include "ah.h" #include "ah_internal.h" #include "ah_desc.h" #include "ar5210/ar5210.h" #include "ar5210/ar5210reg.h" #include "ar5210/ar5210desc.h" /* * Get the RXDP. */ uint32_t ar5210GetRxDP(struct ath_hal *ah) { return OS_REG_READ(ah, AR_RXDP); } /* * Set the RxDP. */ void ar5210SetRxDP(struct ath_hal *ah, uint32_t rxdp) { OS_REG_WRITE(ah, AR_RXDP, rxdp); } /* * Set Receive Enable bits. */ void ar5210EnableReceive(struct ath_hal *ah) { OS_REG_WRITE(ah, AR_CR, AR_CR_RXE); } /* * Stop Receive at the DMA engine */ HAL_BOOL ar5210StopDmaReceive(struct ath_hal *ah) { int i; OS_REG_WRITE(ah, AR_CR, AR_CR_RXD); /* Set receive disable bit */ for (i = 0; i < 1000; i++) { if ((OS_REG_READ(ah, AR_CR) & AR_CR_RXE) == 0) return AH_TRUE; OS_DELAY(10); } #ifdef AH_DEBUG ath_hal_printf(ah, "ar5210: dma receive failed to stop in 10ms\n"); ath_hal_printf(ah, "AR_CR=0x%x\n", OS_REG_READ(ah, AR_CR)); ath_hal_printf(ah, "AR_DIAG_SW=0x%x\n", OS_REG_READ(ah, AR_DIAG_SW)); #endif return AH_FALSE; } /* * Start Transmit at the PCU engine (unpause receive) */ void ar5210StartPcuReceive(struct ath_hal *ah) { OS_REG_WRITE(ah, AR_DIAG_SW, OS_REG_READ(ah, AR_DIAG_SW) & ~(AR_DIAG_SW_DIS_RX)); } /* * Stop Transmit at the PCU engine (pause receive) */ void ar5210StopPcuReceive(struct ath_hal *ah) { OS_REG_WRITE(ah, AR_DIAG_SW, OS_REG_READ(ah, AR_DIAG_SW) | AR_DIAG_SW_DIS_RX); } /* * Set multicast filter 0 (lower 32-bits) * filter 1 (upper 32-bits) */ void ar5210SetMulticastFilter(struct ath_hal *ah, uint32_t filter0, uint32_t filter1) { OS_REG_WRITE(ah, AR_MCAST_FIL0, filter0); OS_REG_WRITE(ah, AR_MCAST_FIL1, filter1); } /* * Clear multicast filter by index */ HAL_BOOL ar5210ClrMulticastFilterIndex(struct ath_hal *ah, uint32_t ix) { uint32_t val; if (ix >= 64) return AH_FALSE; if (ix >= 32) { val = OS_REG_READ(ah, AR_MCAST_FIL1); OS_REG_WRITE(ah, AR_MCAST_FIL1, (val &~ (1<<(ix-32)))); } else { val = OS_REG_READ(ah, AR_MCAST_FIL0); OS_REG_WRITE(ah, AR_MCAST_FIL0, (val &~ (1<= 64) return AH_FALSE; if (ix >= 32) { val = OS_REG_READ(ah, AR_MCAST_FIL1); OS_REG_WRITE(ah, AR_MCAST_FIL1, (val | (1<<(ix-32)))); } else { val = OS_REG_READ(ah, AR_MCAST_FIL0); OS_REG_WRITE(ah, AR_MCAST_FIL0, (val | (1<ds_ctl0 = 0; ads->ds_ctl1 = size & AR_BufLen; if (ads->ds_ctl1 != size) { HALDEBUG(ah, HAL_DEBUG_ANY, "%s: buffer size %u too large\n", __func__, size); return AH_FALSE; } if (flags & HAL_RXDESC_INTREQ) ads->ds_ctl1 |= AR_RxInterReq; ads->ds_status0 = ads->ds_status1 = 0; return AH_TRUE; } /* * Process an RX descriptor, and return the status to the caller. * Copy some hardware specific items into the software portion * of the descriptor. * * NB: the caller is responsible for validating the memory contents * of the descriptor (e.g. flushing any cached copy). */ HAL_STATUS ar5210ProcRxDesc(struct ath_hal *ah, struct ath_desc *ds, uint32_t pa, struct ath_desc *nds, uint64_t tsf, struct ath_rx_status *rs) { struct ar5210_desc *ads = AR5210DESC(ds); struct ar5210_desc *ands = AR5210DESC(nds); uint32_t now, rstamp; if ((ads->ds_status1 & AR_Done) == 0) return HAL_EINPROGRESS; /* * Given the use of a self-linked tail be very sure that the hw is * done with this descriptor; the hw may have done this descriptor * once and picked it up again...make sure the hw has moved on. */ if ((ands->ds_status1 & AR_Done) == 0 && OS_REG_READ(ah, AR_RXDP) == pa) return HAL_EINPROGRESS; rs->rs_datalen = ads->ds_status0 & AR_DataLen; rstamp = MS(ads->ds_status1, AR_RcvTimestamp); /* * Convert timestamp. The value in the * descriptor is bits [10..22] of the TSF. */ now = (OS_REG_READ(ah, AR_TSF_L32) >> 10) & 0xffff; if ((now & 0x1fff) < rstamp) rstamp |= (now - 0x2000) & 0xffff; else rstamp |= now; /* NB: keep only 15 bits for consistency w/ other chips */ rs->rs_tstamp = rstamp & 0x7fff; rs->rs_status = 0; if ((ads->ds_status1 & AR_FrmRcvOK) == 0) { if (ads->ds_status1 & AR_CRCErr) rs->rs_status |= HAL_RXERR_CRC; else if (ads->ds_status1 & AR_DecryptCRCErr) rs->rs_status |= HAL_RXERR_DECRYPT; else if (ads->ds_status1 & AR_FIFOOverrun) rs->rs_status |= HAL_RXERR_FIFO; else { rs->rs_status |= HAL_RXERR_PHY; rs->rs_phyerr = (ads->ds_status1 & AR_PHYErr) >> AR_PHYErr_S; } } /* XXX what about KeyCacheMiss? */ rs->rs_rssi = MS(ads->ds_status0, AR_RcvSigStrength); if (ads->ds_status1 & AR_KeyIdxValid) rs->rs_keyix = MS(ads->ds_status1, AR_KeyIdx); else rs->rs_keyix = HAL_RXKEYIX_INVALID; /* NB: caller expected to do rate table mapping */ rs->rs_rate = MS(ads->ds_status0, AR_RcvRate); rs->rs_antenna = (ads->ds_status0 & AR_RcvAntenna) ? 1 : 0; rs->rs_more = (ads->ds_status0 & AR_More) ? 1 : 0; return HAL_OK; }