1 /*- 2 * SPDX-License-Identifier: ISC 3 * 4 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 5 * Copyright (c) 2002-2008 Atheros Communications, Inc. 6 * 7 * Permission to use, copy, modify, and/or distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 * 19 * $FreeBSD$ 20 */ 21 #include "opt_ah.h" 22 23 #include "ah.h" 24 #include "ah_internal.h" 25 26 #include "ar5212/ar5212.h" 27 #include "ar5212/ar5212reg.h" 28 #include "ar5212/ar5212phy.h" 29 30 /* 31 * Checks to see if an interrupt is pending on our NIC 32 * 33 * Returns: TRUE if an interrupt is pending 34 * FALSE if not 35 */ 36 HAL_BOOL 37 ar5212IsInterruptPending(struct ath_hal *ah) 38 { 39 /* 40 * Some platforms trigger our ISR before applying power to 41 * the card, so make sure the INTPEND is really 1, not 0xffffffff. 42 */ 43 return (OS_REG_READ(ah, AR_INTPEND) == AR_INTPEND_TRUE); 44 } 45 46 /* 47 * Reads the Interrupt Status Register value from the NIC, thus deasserting 48 * the interrupt line, and returns both the masked and unmasked mapped ISR 49 * values. The value returned is mapped to abstract the hw-specific bit 50 * locations in the Interrupt Status Register. 51 * 52 * Returns: A hardware-abstracted bitmap of all non-masked-out 53 * interrupts pending, as well as an unmasked value 54 */ 55 HAL_BOOL 56 ar5212GetPendingInterrupts(struct ath_hal *ah, HAL_INT *masked) 57 { 58 uint32_t isr, isr0, isr1; 59 uint32_t mask2; 60 struct ath_hal_5212 *ahp = AH5212(ah); 61 62 isr = OS_REG_READ(ah, AR_ISR); 63 mask2 = 0; 64 if (isr & AR_ISR_BCNMISC) { 65 uint32_t isr2 = OS_REG_READ(ah, AR_ISR_S2); 66 if (isr2 & AR_ISR_S2_TIM) 67 mask2 |= HAL_INT_TIM; 68 if (isr2 & AR_ISR_S2_DTIM) 69 mask2 |= HAL_INT_DTIM; 70 if (isr2 & AR_ISR_S2_DTIMSYNC) 71 mask2 |= HAL_INT_DTIMSYNC; 72 if (isr2 & AR_ISR_S2_CABEND) 73 mask2 |= HAL_INT_CABEND; 74 if (isr2 & AR_ISR_S2_TBTT) 75 mask2 |= HAL_INT_TBTT; 76 } 77 isr = OS_REG_READ(ah, AR_ISR_RAC); 78 if (isr == 0xffffffff) { 79 *masked = 0; 80 return AH_FALSE; 81 } 82 83 *masked = isr & HAL_INT_COMMON; 84 85 if (isr & AR_ISR_HIUERR) 86 *masked |= HAL_INT_FATAL; 87 if (isr & (AR_ISR_RXOK | AR_ISR_RXERR)) 88 *masked |= HAL_INT_RX; 89 if (isr & (AR_ISR_TXOK | AR_ISR_TXDESC | AR_ISR_TXERR | AR_ISR_TXEOL)) { 90 *masked |= HAL_INT_TX; 91 isr0 = OS_REG_READ(ah, AR_ISR_S0_S); 92 ahp->ah_intrTxqs |= MS(isr0, AR_ISR_S0_QCU_TXOK); 93 ahp->ah_intrTxqs |= MS(isr0, AR_ISR_S0_QCU_TXDESC); 94 isr1 = OS_REG_READ(ah, AR_ISR_S1_S); 95 ahp->ah_intrTxqs |= MS(isr1, AR_ISR_S1_QCU_TXERR); 96 ahp->ah_intrTxqs |= MS(isr1, AR_ISR_S1_QCU_TXEOL); 97 } 98 99 /* 100 * Receive overrun is usually non-fatal on Oahu/Spirit. 101 * BUT on some parts rx could fail and the chip must be reset. 102 * So we force a hardware reset in all cases. 103 */ 104 if ((isr & AR_ISR_RXORN) && AH_PRIVATE(ah)->ah_rxornIsFatal) { 105 HALDEBUG(ah, HAL_DEBUG_ANY, 106 "%s: receive FIFO overrun interrupt\n", __func__); 107 *masked |= HAL_INT_FATAL; 108 } 109 *masked |= mask2; 110 111 /* 112 * On fatal errors collect ISR state for debugging. 113 */ 114 if (*masked & HAL_INT_FATAL) { 115 AH_PRIVATE(ah)->ah_fatalState[0] = isr; 116 AH_PRIVATE(ah)->ah_fatalState[1] = OS_REG_READ(ah, AR_ISR_S0_S); 117 AH_PRIVATE(ah)->ah_fatalState[2] = OS_REG_READ(ah, AR_ISR_S1_S); 118 AH_PRIVATE(ah)->ah_fatalState[3] = OS_REG_READ(ah, AR_ISR_S2_S); 119 AH_PRIVATE(ah)->ah_fatalState[4] = OS_REG_READ(ah, AR_ISR_S3_S); 120 AH_PRIVATE(ah)->ah_fatalState[5] = OS_REG_READ(ah, AR_ISR_S4_S); 121 HALDEBUG(ah, HAL_DEBUG_ANY, 122 "%s: fatal error, ISR_RAC=0x%x ISR_S2_S=0x%x\n", 123 __func__, isr, AH_PRIVATE(ah)->ah_fatalState[3]); 124 } 125 return AH_TRUE; 126 } 127 128 HAL_INT 129 ar5212GetInterrupts(struct ath_hal *ah) 130 { 131 return AH5212(ah)->ah_maskReg; 132 } 133 134 /* 135 * Atomically enables NIC interrupts. Interrupts are passed in 136 * via the enumerated bitmask in ints. 137 */ 138 HAL_INT 139 ar5212SetInterrupts(struct ath_hal *ah, HAL_INT ints) 140 { 141 struct ath_hal_5212 *ahp = AH5212(ah); 142 uint32_t omask = ahp->ah_maskReg; 143 uint32_t mask, mask2; 144 145 HALDEBUG(ah, HAL_DEBUG_INTERRUPT, "%s: 0x%x => 0x%x\n", 146 __func__, omask, ints); 147 148 if (omask & HAL_INT_GLOBAL) { 149 HALDEBUG(ah, HAL_DEBUG_INTERRUPT, "%s: disable IER\n", __func__); 150 OS_REG_WRITE(ah, AR_IER, AR_IER_DISABLE); 151 (void) OS_REG_READ(ah, AR_IER); /* flush write to HW */ 152 } 153 154 mask = ints & HAL_INT_COMMON; 155 mask2 = 0; 156 if (ints & HAL_INT_TX) { 157 if (ahp->ah_txOkInterruptMask) 158 mask |= AR_IMR_TXOK; 159 if (ahp->ah_txErrInterruptMask) 160 mask |= AR_IMR_TXERR; 161 if (ahp->ah_txDescInterruptMask) 162 mask |= AR_IMR_TXDESC; 163 if (ahp->ah_txEolInterruptMask) 164 mask |= AR_IMR_TXEOL; 165 } 166 if (ints & HAL_INT_RX) 167 mask |= AR_IMR_RXOK | AR_IMR_RXERR | AR_IMR_RXDESC; 168 if (ints & (HAL_INT_BMISC)) { 169 mask |= AR_IMR_BCNMISC; 170 if (ints & HAL_INT_TIM) 171 mask2 |= AR_IMR_S2_TIM; 172 if (ints & HAL_INT_DTIM) 173 mask2 |= AR_IMR_S2_DTIM; 174 if (ints & HAL_INT_DTIMSYNC) 175 mask2 |= AR_IMR_S2_DTIMSYNC; 176 if (ints & HAL_INT_CABEND) 177 mask2 |= AR_IMR_S2_CABEND; 178 if (ints & HAL_INT_TBTT) 179 mask2 |= AR_IMR_S2_TBTT; 180 } 181 if (ints & HAL_INT_FATAL) { 182 /* 183 * NB: ar5212Reset sets MCABT+SSERR+DPERR in AR_IMR_S2 184 * so enabling HIUERR enables delivery. 185 */ 186 mask |= AR_IMR_HIUERR; 187 } 188 189 /* Write the new IMR and store off our SW copy. */ 190 HALDEBUG(ah, HAL_DEBUG_INTERRUPT, "%s: new IMR 0x%x\n", __func__, mask); 191 OS_REG_WRITE(ah, AR_IMR, mask); 192 OS_REG_WRITE(ah, AR_IMR_S2, 193 (OS_REG_READ(ah, AR_IMR_S2) &~ AR_IMR_SR2_BCNMISC) | mask2); 194 ahp->ah_maskReg = ints; 195 196 /* Re-enable interrupts if they were enabled before. */ 197 if (ints & HAL_INT_GLOBAL) { 198 HALDEBUG(ah, HAL_DEBUG_INTERRUPT, "%s: enable IER\n", __func__); 199 OS_REG_WRITE(ah, AR_IER, AR_IER_ENABLE); 200 } 201 return omask; 202 } 203