2 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
3 * Copyright (c) 2002-2004 Atheros Communications, Inc.
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 #include "ah_internal.h"
25 #include "ar5210/ar5210.h"
26 #include "ar5210/ar5210reg.h"
27 #include "ar5210/ar5210desc.h"
33 ar5210GetRxDP(struct ath_hal *ah, HAL_RX_QUEUE qtype)
36 HALASSERT(qtype == HAL_RX_QUEUE_HP);
37 return OS_REG_READ(ah, AR_RXDP);
44 ar5210SetRxDP(struct ath_hal *ah, uint32_t rxdp, HAL_RX_QUEUE qtype)
47 HALASSERT(qtype == HAL_RX_QUEUE_HP);
48 OS_REG_WRITE(ah, AR_RXDP, rxdp);
53 * Set Receive Enable bits.
56 ar5210EnableReceive(struct ath_hal *ah)
58 OS_REG_WRITE(ah, AR_CR, AR_CR_RXE);
62 * Stop Receive at the DMA engine
65 ar5210StopDmaReceive(struct ath_hal *ah)
69 OS_REG_WRITE(ah, AR_CR, AR_CR_RXD); /* Set receive disable bit */
70 for (i = 0; i < 1000; i++) {
71 if ((OS_REG_READ(ah, AR_CR) & AR_CR_RXE) == 0)
76 ath_hal_printf(ah, "ar5210: dma receive failed to stop in 10ms\n");
77 ath_hal_printf(ah, "AR_CR=0x%x\n", OS_REG_READ(ah, AR_CR));
78 ath_hal_printf(ah, "AR_DIAG_SW=0x%x\n", OS_REG_READ(ah, AR_DIAG_SW));
84 * Start Transmit at the PCU engine (unpause receive)
87 ar5210StartPcuReceive(struct ath_hal *ah)
89 ar5210UpdateDiagReg(ah,
90 OS_REG_READ(ah, AR_DIAG_SW) & ~(AR_DIAG_SW_DIS_RX));
94 * Stop Transmit at the PCU engine (pause receive)
97 ar5210StopPcuReceive(struct ath_hal *ah)
99 ar5210UpdateDiagReg(ah,
100 OS_REG_READ(ah, AR_DIAG_SW) | AR_DIAG_SW_DIS_RX);
104 * Set multicast filter 0 (lower 32-bits)
105 * filter 1 (upper 32-bits)
108 ar5210SetMulticastFilter(struct ath_hal *ah, uint32_t filter0, uint32_t filter1)
110 OS_REG_WRITE(ah, AR_MCAST_FIL0, filter0);
111 OS_REG_WRITE(ah, AR_MCAST_FIL1, filter1);
115 * Clear multicast filter by index
118 ar5210ClrMulticastFilterIndex(struct ath_hal *ah, uint32_t ix)
125 val = OS_REG_READ(ah, AR_MCAST_FIL1);
126 OS_REG_WRITE(ah, AR_MCAST_FIL1, (val &~ (1<<(ix-32))));
128 val = OS_REG_READ(ah, AR_MCAST_FIL0);
129 OS_REG_WRITE(ah, AR_MCAST_FIL0, (val &~ (1<<ix)));
135 * Set multicast filter by index
138 ar5210SetMulticastFilterIndex(struct ath_hal *ah, uint32_t ix)
145 val = OS_REG_READ(ah, AR_MCAST_FIL1);
146 OS_REG_WRITE(ah, AR_MCAST_FIL1, (val | (1<<(ix-32))));
148 val = OS_REG_READ(ah, AR_MCAST_FIL0);
149 OS_REG_WRITE(ah, AR_MCAST_FIL0, (val | (1<<ix)));
155 * Return the receive packet filter.
158 ar5210GetRxFilter(struct ath_hal *ah)
160 /* XXX can't be sure if promiscuous mode is set because of PHYRADAR */
161 return OS_REG_READ(ah, AR_RX_FILTER);
165 * Turn off/on bits in the receive packet filter.
168 ar5210SetRxFilter(struct ath_hal *ah, uint32_t bits)
170 if (bits & HAL_RX_FILTER_PHYRADAR) {
171 /* must enable promiscuous mode to get radar */
172 bits = (bits &~ HAL_RX_FILTER_PHYRADAR) | AR_RX_FILTER_PROMISCUOUS;
174 OS_REG_WRITE(ah, AR_RX_FILTER, bits);
178 * Initialize RX descriptor, by clearing the status and clearing
179 * the size. This is not strictly HW dependent, but we want the
180 * control and status words to be opaque above the hal.
183 ar5210SetupRxDesc(struct ath_hal *ah, struct ath_desc *ds,
184 uint32_t size, u_int flags)
186 struct ar5210_desc *ads = AR5210DESC(ds);
191 ads->ds_ctl1 = size & AR_BufLen;
192 if (ads->ds_ctl1 != size) {
193 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: buffer size %u too large\n",
197 if (flags & HAL_RXDESC_INTREQ)
198 ads->ds_ctl1 |= AR_RxInterReq;
199 ads->ds_status0 = ads->ds_status1 = 0;
205 * Process an RX descriptor, and return the status to the caller.
206 * Copy some hardware specific items into the software portion
209 * NB: the caller is responsible for validating the memory contents
210 * of the descriptor (e.g. flushing any cached copy).
213 ar5210ProcRxDesc(struct ath_hal *ah, struct ath_desc *ds,
214 uint32_t pa, struct ath_desc *nds, uint64_t tsf,
215 struct ath_rx_status *rs)
217 struct ar5210_desc *ads = AR5210DESC(ds);
218 struct ar5210_desc *ands = AR5210DESC(nds);
219 uint32_t now, rstamp;
221 if ((ads->ds_status1 & AR_Done) == 0)
222 return HAL_EINPROGRESS;
224 * Given the use of a self-linked tail be very sure that the hw is
225 * done with this descriptor; the hw may have done this descriptor
226 * once and picked it up again...make sure the hw has moved on.
228 if ((ands->ds_status1 & AR_Done) == 0 && OS_REG_READ(ah, AR_RXDP) == pa)
229 return HAL_EINPROGRESS;
231 rs->rs_datalen = ads->ds_status0 & AR_DataLen;
232 rstamp = MS(ads->ds_status1, AR_RcvTimestamp);
234 * Convert timestamp. The value in the
235 * descriptor is bits [10..22] of the TSF.
237 now = (OS_REG_READ(ah, AR_TSF_L32) >> 10) & 0xffff;
238 if ((now & 0x1fff) < rstamp)
239 rstamp |= (now - 0x2000) & 0xffff;
242 /* NB: keep only 15 bits for consistency w/ other chips */
243 rs->rs_tstamp = rstamp & 0x7fff;
245 if ((ads->ds_status1 & AR_FrmRcvOK) == 0) {
246 if (ads->ds_status1 & AR_CRCErr)
247 rs->rs_status |= HAL_RXERR_CRC;
248 else if (ads->ds_status1 & AR_DecryptCRCErr)
249 rs->rs_status |= HAL_RXERR_DECRYPT;
250 else if (ads->ds_status1 & AR_FIFOOverrun)
251 rs->rs_status |= HAL_RXERR_FIFO;
253 rs->rs_status |= HAL_RXERR_PHY;
255 (ads->ds_status1 & AR_PHYErr) >> AR_PHYErr_S;
258 /* XXX what about KeyCacheMiss? */
259 rs->rs_rssi = MS(ads->ds_status0, AR_RcvSigStrength);
260 if (ads->ds_status1 & AR_KeyIdxValid)
261 rs->rs_keyix = MS(ads->ds_status1, AR_KeyIdx);
263 rs->rs_keyix = HAL_RXKEYIX_INVALID;
264 /* NB: caller expected to do rate table mapping */
265 rs->rs_rate = MS(ads->ds_status0, AR_RcvRate);
266 rs->rs_antenna = (ads->ds_status0 & AR_RcvAntenna) ? 1 : 0;
267 rs->rs_more = (ads->ds_status0 & AR_More) ? 1 : 0;